From jmcmonagle at velseis.com.au  Mon May 19 18:44:05 2008
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Tue, 20 May 2008 08:44:05 +1000
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
In-Reply-To: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
Message-ID: <483202B5.2000109@velseis.com.au>

notnorwegian at yahoo.se wrote:
> ' '.join([`x  x` for x in range(1, 6)])
> 
> anyone can tell me what im doing wrong?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


' '.join(['%s %s' % (str(x), str(x)) for x in range(1,6)])

or

' '.join([str(x)+' '+str(x) for x in range(1,6)])


outputs....

'1 1 2 2 3 3 4 4 5 5'


Is that what you were after ?


From slesarev.anton at gmail.com  Wed May  7 06:13:04 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Wed, 7 May 2008 03:13:04 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
Message-ID: <b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>

I try to save my time not cpu cycles)

I've got file which I really need to parse:
-rw-rw-r--  1 xxx  xxx  3381564736 May  7 09:29 bigfile

That's my results:

$ time grep "python" bigfile | wc -l
    2470

real    0m4.744s
user    0m2.441s
sys     0m2.307s

And python scripts:

import sys

if len(sys.argv) != 3:
   print 'grep.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r')

print ''.join((line for line in f if sys.argv[1] in line)),

$ time python grep.py "python" bigfile | wc -l
    2470

real    0m37.225s
user    0m34.215s
sys     0m3.009s

Second script:

import sys

if len(sys.argv) != 3:
   print 'grepwc.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r',100000000)

print sum((1 for line in f if sys.argv[1] in line)),


time python grepwc.py "python" bigfile
2470

real    0m39.357s
user    0m34.410s
sys     0m4.491s

40 sec and 5. This is really sad...

That was on freeBSD.



On windows cygwin.

Size of bigfile is ~50 mb

$ time grep "python" bigfile | wc -l
51

real    0m0.196s
user    0m0.169s
sys     0m0.046s

$ time python grepwc.py "python" bigfile
51

real    0m25.485s
user    0m2.733s
sys     0m0.375s



From tjreedy at udel.edu  Sun May 25 21:23:42 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:23:42 -0400
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
	<eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com><83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com><59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>
	<g1cu8n$5g4$1@aioe.org>
Message-ID: <g1d3et$ep4$1@ger.gmane.org>


"Martin Manns" <mmanns at gmx.net> wrote in message 
news:g1cu8n$5g4$1 at aioe.org...
| On Sun, 25 May 2008 14:39:28 -0700 (PDT)
| bearophileHUGS at lycos.com wrote:
|
| > This may have some bugs left, but it looks a bit better:
| [...]
| >         self._hash = hash(self._func.func_code) ^ \
| >                      hash(tuple(signature[0]) + tuple(signature[1:3]))
| >     def __eq__(self, other):
| >         return self._func.func_code == other._func.func_code and \
| >                getargspec(self._func) == getargspec(other._func)
| >     def __hash__(self):
| >         return self._hash
| >     def __call__(self, *args, **kwargs):
| >         return self._func(*args, **kwargs)
| >
| > I haven't put a full hashing of getargspec(self._func) too into the
| > __init__() because it may contain too much nested unhashable
| > structures, but the __eq__() is able to tell them apart anyway, with
| > some collisions.
|
| Looking at a function:
|
| >>> a=lambda x:x
| >>> dir(a)
| ['__call__', '__class__', '__delattr__', '__dict__', '__doc__',
| '__get__', '__getattribute__', '__hash__', '__init__', '__module__',
| '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',
| '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults',
| 'func_dict', 'func_doc', 'func_globals', 'func_name']
|
| Should func_globals and func_name also be taken into account for
| __eq__()?

It depends on what *you* want == to mean.

tjr





From castironpi at gmail.com  Sat May  3 19:54:54 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 3 May 2008 16:54:54 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
Message-ID: <9c6347c2-1d28-407d-80db-37d73c5a8f22@w74g2000hsh.googlegroups.com>

On May 3, 1:59?pm, bearophileH... at lycos.com wrote:
> Sometimes different languages suggests me ways to cross-pollinate
> them.
>
> (Note: probably someone has already suggested (and even implemented)
> the following ideas, but I like to know why they aren't fit for
> Python).
>
> Python generators now allow me to package some code patterns common in
> my code, that other (older) languages didn't allow me to extract; for
> example given a sequence (array, list, etc) of items now and then I
> need to scan all the upper triangle of their cross matrix:
>
> def xpairs(seq):
>
> ? ? len_seq = len(seq)
>
> ? ? for i, e1 in enumerate(seq):
>
> ? ? ? ? for j in xrange(i+1, len_seq):
>
> ? ? ? ? ? ? yield e1, seq[j]
>
> Or adjacent ones (there are ways to generalize the following function,
> but this the most common situation for me):
>
> def xpairwise(iterable):
>
> ? ? return izip(iterable, islice(iterable, 1, None))
>
> That xpairs() generator is nice, but it's not the best possible code
> (but you may disagree with me, and you may think that code better than
> the successive D code that uses two slices). Inside it I can't use a
> list slicing because it copies subparts of the list, probably becoming
> too much slow (for example if len(seq) == 1000).
>
> Compared to Python, the D language is at lower level, so you may
> expect it to have a worse syntax (but the ShedSkin compiler has shown
> me once for all that you can have a language that is both high-level,
> with a short & sexy syntax, and very fast), but you can define a
> xpairs() iterable class in it too, and the core of that iterable class
> there's a method that may look like this:
>
> if (this.seq.length > 1)
>
> ? foreach (i, e1; this.seq[0 .. $-1])
>
> ? ? foreach (e2; this.seq[i+1 .. $]) {
>
> ? ? ? result = dg(e1, e2); if (result) break; // yield
>
> ? ? }
>
> Where the strange last line is the yield, and the $ inside [] is the
> length of the current array (a very clever idea that avoids the need
> for negative indexes).
>
> That D code is as fast or faster than the code you can back-translate
> from Python, this is possible because in D arrays slices are very
> light, they are a struct of <length, pointer> (in the future they may
> change to a couple of pointers, to speed up the array slice scanning).
> So if you slice an array you don't copy its contents, just the start-
> end points of the slice. If you read/scan the slice that's all you
> have, while if you write on it, D uses a Copy-On-Write strategy, that
> is a just-in-time copy of the slice contents.
>
> In practice this speeds up lot of code that manages strings and arrays
> (like a XML parser, making it among the faster ones).
>
> Being the slice a struct, it's stack allocated, so the inner foreach
> doesn't even create a slice object in the heap each time the outer
> foreach loops.
>
> One problem with this strategy is that if you have a huge string, and
> you keep only a little slice of it, the D garbage collector will keep
> it all in memory. To avoid that problem you have to duplicate the
> slice manually:
>
> somestring[inf...sup].dup;
>
> I think Psyco in some situations is able to manage string slices
> avoiding the copy.
>
> I think Python 3.0 too may enjoy a similar strategy of light slices +
> COW for strings, lists and arrays (tuples and strings don't need the
> COW).
>
> Bye,
>
> bearophile

In my understanding, the operating system links files across multiple
sections on a disk, while keeping those details from client software.

Files:

AAAA    BBBB AA CCCCCCCCC

While File A still reads as: AAAAAA, correctly.

Modifications to B as follow:

Files:

AAAA    BBBB AA CCCCCCCCC BBBB

In the case of a large mutable string, modifications can cause linear-
time operations, even if only making a constant-time change.

String:

abcdefg

Modification:

aAbcdefg

causes the entire string to be recopied.  Expensive at scale.

A string-on-disk structure could provide linking, such as a String
File Allocation Table.

abcdefg  A

correctly reads as:

aAbcdefg


From ivlenin at gmail.com  Fri May 23 04:27:27 2008
From: ivlenin at gmail.com (I V)
Date: Fri, 23 May 2008 08:27:27 GMT
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <PdvZj.257$xZ.218@nlpi070.nbdc.sbc.com>

On Fri, 23 May 2008 00:12:35 -0700, Marc Oldenhof wrote:
> It seems that Python calls numpy's "all" instead of the standard one, is
> that right? If so, how can I call the standard "all" after the numpy
> import? ["import numpy" is not a desirable option, I use a lot of math
> in my progs]

I think the ideal solution is to try and persuade yourself that typing 
"numpy." in front of some functions now and then is not that big a price 
to pay to avoid name collisions; using an editor with code completion 
would probably help in that task.

You could also try:

import numpy as n

which reduces the typing a bit and limits you to one possible name 
collision, or

from numpy import array, gradient #and whatever else you need

or 

import numpy

array = numpy.array
gradient = numpy.gradient # Then you can access the names you use a lot 
		 	  # directly, while accessing stuff you use less
			  # frequently via numpy.whatever

in which case you'll know exactly which names you're overwriting. Peter's 
solution, of explicitly deleting some names that you've imported, strikes 
me as less good, because you might find the same problem recurs later, if 
the numpy developers add new names to the module.


From beema.shafreen at gmail.com  Wed May 21 04:40:26 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Wed, 21 May 2008 14:10:26 +0530
Subject: Typeerror
Message-ID: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>

Hi all,
I getting the following error when i run my scirpt ,
can somebody help me regarding this to solve the type error problem


Traceback (most recent call last):
  File "get_one_prt_pep.py", line 59, in ?
    if len(data[res])<=1:
TypeError: string indices must be integers


-- 
Beema Shafreen
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From george.sakkis at gmail.com  Thu May  1 19:50:20 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 16:50:20 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.432.1209678316.12834.python-list@python.org>
	<b99f71ed-4279-4412-82d0-b2a8ef6a4a87@j33g2000pri.googlegroups.com>
Message-ID: <4b35fb1d-e273-4c94-b49c-c9e6cdee06c0@24g2000hsh.googlegroups.com>

On May 1, 7:13?pm, Graham Dumpleton <Graham.Dumple... at gmail.com>
wrote:
> On May 2, 7:45 am, Christian Heimes <li... at cheimes.de> wrote:
>
>
>
> > jmDesktop schrieb:
>
> > > I have been to the main python site, but am still confused. ?I have
> > > been using .net, so it may be obvious how to do this to everyone
> > > else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> > > but I would like to know how to create web pages without these. ?If I
> > > havemod_pythonor fastcgi on apache, where do I start? ?I don't have
> > > clue where to begin to create a web page from scratch in python. ?I am
> > > sure I will want to access database, etc., all the "normal" stuff, I
> > > just want to do it myself as opposed to the frameworks, for learning.
>
> > I highly recommend WSGI instead ofmod_pythonor (fast)cgi. I've heard
> > only bad things aboutmod_pythonover the past years and CGI is totally
> > old school.
>
> > Check out Python Paste, CherryPy and Django. You can also try the Zope,
> > Zope3 and Plone world but Zope is usually for larger and complex
> > applications.
>
> > Most frameworks come with their own little web server for development, too.
>
> I'd also suggest avoiding coding anything directly to mod_python and
> instead base things on WSGI. You can still run it on mod_python with a
> suitable adapter, but you can also run it with mod_wsgi, mod_fastcgi,
> or using pure Python web servers such as the one in Paste as well.
>
> For a low level nuts and bolts (anti framework) approach I'd suggest
> looking at:
>
> ?http://dev.pocoo.org/projects/werkzeug/
>
> This gives you all the basic components, but it is really up to you as
> to how you put them together, which seems to be what you want to be
> able to do.

Or if you don't want to use any 3rd party package and have Python 2.5,
you may start from http://www.xml.com/pub/a/2006/09/27/introducing-wsgi-pythons-secret-web-weapon.html.
Here's the standard "Hello world!" example:

from wsgiref.simple_server import make_server

def application(environ, start_response):
    start_response('200 OK',[('Content-type','text/html')])
    return ['<html><body>Hello World!</body></html>']

httpd = make_server('', 8000, application)
print "Serving HTTP on port 8000..."
httpd.serve_forever()

and point your browser to http://localhost:8000/

HTH,
George


From tjreedy at udel.edu  Wed May 14 13:48:14 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 13:48:14 -0400
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com><mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <g0f8kq$k97$1@ger.gmane.org>


"Nikhil" <mnikhil at gmail.com> wrote in message 
news:g0ev6o$utb$1 at registered.motzarella.org...
| Then why to have __len__() internal method at all when the built-in
| len() is faster?

Nearly all syntax constructions and builtin functions are implemented by 
calling one or another of the __special__ methods.  This is what makes 
Python code so generic and plugging your own classes into the system so 
easy.

For example, collection[key] = value is implemented by calling 
collection.__setitem__(key, value).  When you define a class with that 
method, that syntax will work with its instances just the same as for 
builtin classes.

Similarly, a+b is implemented by calling a.__add__(b).  So if a class 
defines __add__, you can 'add' its instances (whatever 'add' means for that 
class) with '+'.

(The fact that an *implementation* may followup the 'as if' rule and 
optimize operations for certain classes by combining steps does not negate 
the *language* rules given above.)

tjr





From paul.hankin at gmail.com  Tue May 27 16:35:14 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 27 May 2008 13:35:14 -0700 (PDT)
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
Message-ID: <0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>

On May 27, 9:21?pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> I have a generic (do nothing) exception class that's coded like this:
>
> class MyError(exceptions.Exception):
> ? ? def __init__(self,args=None):
> ? ? ? ? self.args = args
>
> When I attempt to raise this exception via 'raise MyError' I get an exception
> within the MyError constructor __init__ as follows:
>
> Traceback (most recent call last):
> [lines deleted]
> ? File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
> MyStuff.py", line 7, in __init__
> ? ? self.args = args
> TypeError: 'NoneType' object is not iterable
>
> Ummm... why should 'args' have to be iterable anyway? ?I don't understand
> what's going on here? ?Could someone help me with this?

Did you actually write self,args = args?

--
Paul Hankin


From jackyuke at gmail.com  Sat May 24 08:48:57 2008
From: jackyuke at gmail.com (Jack Yu)
Date: Sat, 24 May 2008 12:48:57 +0000 (UTC)
Subject: Popen: NameError: name 'PIPE' is not defined
References: <mailman.1522.1211630957.12834.python-list@python.org>
Message-ID: <g192ro$jb8$1@news.cn99.com>

On Sat, 24 May 2008 14:09:07 +0200?Mathieu Prevot wrote?

> Hi
> 
> I import subprocess and use Popen, but PIPE is not defined. I used
> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
> always the same. What am I missing ?
> 
> Thanks
> Mathieu

Try subprocess.PIPE.


From agustin.villena at gmail.com  Wed May 21 19:48:04 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Wed, 21 May 2008 16:48:04 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>
	<mailman.1386.1211299881.12834.python-list@python.org>
Message-ID: <1f686bef-db23-4e17-bedc-434495381542@d1g2000hsg.googlegroups.com>

On 20 mayo, 12:10, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 19 May 2008 10:54:05 -0300, Agustin Villena
> <agustin.vill... at gmail.com> escribi?:
>
> > On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> Agustin Villena schrieb:
>
> >> > is there anyway to show the class of amethodin anexception's
> >> > traceback?
> >> > I want to improve the line
> >> > File "G:\dev\exceptions\sample.py", line 3, in foo
> >> > to
> >> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>
> >> It should be. You can get a dictionary of the locals of anexception
> >> stack frame, of which you could extract the self-parameter's class.
>
> > I digged on sys.exc_info() object and the traceback module and I
> > could't figure how I can get the locals() of theexceptionstackframe
>
> Put this function in traceback.py, and replace the lines
>          name = co.co_name
> with
>          name = guess_full_method_name(f)
> everywhere.
> Please read the docstring!!!
>
> def guess_full_method_name(frame):
>      """Guess classname.methodname for a given frame.
>
>      Only a guess!
>      Assumes the frame belongs to an instancemethod
>      whose first argument is "self", or a classmethod
>      whose first argument is "cls".
>      Doesn't handle correctly any other situation.
>      Returns the class name of the object on which
>      the method was called, not the class where
>      the method was actually defined.
>      """
>      cls_name = None
>      fun_name = frame.f_code.co_name
>      self = frame.f_locals.get('self', None)
>      if self is None:
>          cls = frame.f_locals.get('cls', None)
>      else:
>          cls = getattr(self, '__class__', None)
>      if cls is not None:
>          cls_name = getattr(cls, '__name__', None)
>          if cls_name is not None:
>              return '%s.%s' % (cls_name, fun_name)
>      return fun_name
>
> --
> Gabriel Genellina

Thanks!  I'll try it

Agustin


From george.sakkis at gmail.com  Fri May  9 21:05:26 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 18:05:26 -0700 (PDT)
Subject: Property in derived class
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <7f3a3e02-8207-4661-94fa-48a518720a46@r66g2000hsg.googlegroups.com>

On May 9, 5:20?pm, Joseph Turian <tur... at gmail.com> wrote:
> If I have a property in a derived class, it is difficult to override
> the get and set functions: the property's function object had early
> binding, whereas the overriden method was bound late.
> This was previously discussed:
> ? ?http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?

Using the overridable property recipe [1], it can be written as:

class AbstractFoo(object):

    def _getFoo(self):
        raise NotImplementedError('Abstract method')
    def _setFoo(self, signals):
        raise NotImplementedError('Abstract method')

    foo = OProperty(_getFoo, _setFoo)

HTH,
George


[1] http://infinitesque.net/articles/2005/enhancing%20Python's%20property.xhtml


From gagsl-py2 at yahoo.com.ar  Sun May 11 00:16:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 01:16:46 -0300
Subject: How to call a file
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
	<4825C01F.1070409@islandtraining.com>
Message-ID: <op.uay158tfx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 12:32:47 -0300, Gary Herron <gherron at islandtraining.com> escribi?:

> Chris Sprinkles wrote:
>> I'm still having trouble with calling a text file and I know its so
>> simple here is the code
>> ----------------------------------------------------
>> work = open('C:\Documents and Settings\Administrator\My
>> Documents\Chris\Python\Python\work.txt', 'r')

Also, remember that \ is the escape character for strings in Python. In this particular case it doesn't matter just because you didn't hit any valid escape, but in general, use:
"C:\\Documents and Settings\\Adm..."
r"C:\Documents and Settings\Adm..."
In most cases, Windows recognizes forward slashes also: "C:/Documents and Settings/Adm..."

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Fri May 23 04:35:28 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 08:35:28 GMT
Subject: Python and Flaming Thunder
References: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
Message-ID: <Xns9AA761012A691duncanbooth@127.0.0.1>

Brian Quinlan <brian at sweetapp.com> wrote:

> Dave Parker wrote:
>>> Or just:
>>>
>>> If command is "quit" ...
>> 
>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>> for assigning and checking types.  For example, to read data from a
>> file and check for errors:
>> 
>>      Read data from "input.txt".
>>      If data is an error then go to ...
> 
> Hey Dave,
> 
> Does this mean that Flaming Thunder requires explicit checking rather 
> than offering exceptions?

It looks that way but he doesn't seem to have got as far as documenting 
errors: the documentation gives several examples of that form and says that 
'error' is a reserved word but says nothing about how you create an error 
of if you can distinguish one error from another:

I'm guessing you can't as FT doesn't appear to have any concept of 
attributes on objects (or even any concept of objects): so far as I can see 
the only types are integers, rationals, intervals and strings (and real 
numbers if you pay real money for them).

Maybe I'm missing something though, because I don't see how you can do 
anything useful with out at least some sort of arrays (unless you are 
supposed to store numbers in long strings).

-- 
Duncan Booth http://kupuguy.blogspot.com


From lists at cheimes.de  Wed May  7 16:47:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 22:47:51 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
Message-ID: <48221577.6030408@cheimes.de>

grayaii schrieb:
> There are so many threads on this subject, but I ran across a
> situation on Windows that I can't figure out.
> 
> I'm trying to run this little command-line exe and when I launch like
> this, it hangs:
> 
>>>> import subprocess
>>>> command = r'c:\mydir\foo.exe'
>>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>>> returncode = run.wait()  ## HANGS HERE ##

The code blocks because you aren't reading from stdout and stderr. Use
the communicate() method instead of wait().

Christian



From deets at nospam.web.de  Fri May 30 13:40:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 19:40:17 +0200
Subject: Calling instance methods from a decorator
In-Reply-To: <87d4n3n1z7.fsf@internal.daycos.com>
References: <87d4n3n1z7.fsf@internal.daycos.com>
Message-ID: <6aasg8F35t0j9U1@mid.uni-berlin.de>

Kirk Strauser schrieb:
> I'm trying to write a decorator that would do something like:
> 
> def trace(before, after):
>     def middle(func):
>         def inner(*args, **kwargs):
>             func.im_self.debugfunction(before)
>             result = func(*args, **kwargs)
>             func.im_self.debugfunction(after)
>             return result
>         return inner
>    return middle
> 
> class Foo(object):
>     def __init__(self, myname):
>         self.name = myname
> 
>     def debugfunction(self, message):
>         print 'Instance %s says: %s' % (self.name, message)
> 
>     @trace('calling', 'finished')
>     def bar(self, arg):
>         print arg
> 
>>>> Foo('snake').bar(123)
> Instance snake says: calling
> 123
> Instance snake says: finished
> 
> The gotcha seems to be that there's no way to get to 'self' from within the
> "inner" function, since func will only have the "normal" attributes:
> 
>>>> print dir(func)
> ['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name']
> 
> There's no nice im_self to bounce off of or anything.  I seem to be going
> about this all wrong.  What's a good approach to get the desired effect?

Of course you can get the self - just use the first paramter, because it 
  *is* self. Self is just a parameter - nothing special.

Alternatively, declare inner like this:

def inner(self, *args, **kwargs):
     ...
     try:
        return func(self, *args, **kwargs)
     finally:
        ....


Note the additional try/finally. It's got nothing todo with your 
original problem - but you should use it to guarantee that your trace 
gets called when leaving the call.

Diez


From pavlovevidence at gmail.com  Fri May  2 14:07:45 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 2 May 2008 11:07:45 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87abj91j8u.fsf@benfinney.id.au> 
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au> 
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au> 
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<mailman.461.1209740889.12834.python-list@python.org>
Message-ID: <cfb128ff-516d-4501-8b7c-3d8bf794ef7b@l42g2000hsc.googlegroups.com>

On May 2, 11:07 am, "D'Arcy J.M. Cain" <da... at druid.net> wrote:
> On Sat, 03 May 2008 00:43:02 +1000
>
> Ben Finney <bignose+hates-s... at benfinney.id.au> wrote:
> > Roy Smith <r... at panix.com> writes:
> > > Have you ever shipped software to a customer?
>
> > Yes, and all parties have been quite happy with the results.
>
> When some of us talk about shipping software we aren't talking about a
> 20 line script delivered to our uncle's construction company office.  We
> are talking about millions of lines of code in thousands of programs and
> modules that has to run out of the box on whatever system the client
> happens to run on.

If you're shipping a program that large you out to be packaging the
Python interpreter with it.

Frankly, this whole discussion is silly, as if it's some kind hard
thing to open the script with a text editor and modify the shbang
line.


Carl Banks



> > > Customer: "I can't install it there because <insert whatever silly
> > > reason the customer has>. If you can't make your product work
> > > without requiring me to install python in /usr/bin, I'm afraid I
> > > can't buy your product".
>
> > At this point they have the simple option of running the program with
> > 'python /path/to/the/program'. It's certainly not a case of "can't
> > make the product work".
>
> Simple for your 20 line single script.  Not so simple for my million
> line, integrated system that has to work everywhere.
>
> > It is, however, a case of "can't automatically account for every local
> > customisation sysadmins choose to make on their systems". Perfectly
> > willing to work with them to get their specific environment working,
> > but as a matter of simple economics it's not worth my time to attempt
> > to make such corner cases work automatically.
>
> If by "corner case" you mean "some system that I don't personally run"
> then OK but to some of us your system is the corner case and we would
> like our code to run there as well.
>
> Real software has to deal with the fact that support costs money.
> You may be able to deal with one or two clients that way but that does
> not scale very well.
>
> > If they've already chosen to install Python to some unpredictable
> > location, they know what they're doing enough to invoke the program in
> > a specific way to get it working.
>
> Unpredictable to you.  Perfectly predictable on their system.
>
> I do believe I am done with this thread.
>
> --
> D'Arcy J.M. Cain <da... at druid.net>         |  Democracy is three wolveshttp://www.druid.net/darcy/               |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.



From needin4mation at gmail.com  Tue May  6 11:09:53 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Tue, 6 May 2008 08:09:53 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
Message-ID: <29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>

On May 6, 10:26?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-06, jmDesktop <needin4mat... at gmail.com> wrote:
>
> > Studying OOP and noticed that Python does not have Interfaces. ?Is
> > that correct? ?Is my schooling for nought on these OOP concepts if I
>
> Depends on your definition of 'Python does not have Interfaces'. They are not
> in the official language, but they do exist. look into zope.interfaces, athttp://www.zope.org/Products/ZopeInterface.
>
> > use Python. ?Am I losing something if I don't use the "typical" oop
> > constructs found in other languages (Java, C# come to mind.) ?I'm
>
> I think you are still thinking with a Java mind-set (no idea about C#, never
> programmed with it).
>
> Interfaces mainly exist to formalize TO A COMPILER that an object will provide
> certain stuff. In this way, the compiler can catch such errors at compile time.
>
> Python on the other hand does very little at compile time (other than parse
> errors). Instead, at run-time it performs the checks that something you want to
> use is actually there.
> (in the same way that you don't declare variables a priori. You simply use them
> and Python creates them for you when needed).
>
> As a result, you get much more light-weight, more dynamic, code, which supports
> the RAD nature of Python what makes it so much more productive.
>
> (after a few years Python, you may find the Java way of doing things clunky).
>
> > afraid that if I never use them I'll lose them and when I need them
> > for something beside Python, I'll be lost. ?Thank you.
>
> You can continue doing everything exactly in the way you do now. Effectively
> you would then be programming Java/C# in Python syntax. I believe you would
> gain very little by that move.
>
> If you dare let go of your old habits, and embrace the mindset of a new
> language, you can learn a lot more, namely that programming can be done in many
> different ways (even if all those ways are called OOP).
> If you only have a hammer, the whole world looks like a nail. If you have a
> whole toolbox, problems become much more diverse (subtle). You learn to use
> the right tools for the right problem, and maybe you find new (better) ways of
> approaching old problems.
>
> In the process, you may lose details of how something was done in language X,
> but that's why they have invented books.
>
> Sincerely,
> Albert

I would imagine this is why I haven't found any schools teaching
Python in their basic programming classes too.  On the dynamic typing,
isn't that the same sort of thing that lots of scripting languages
do?  VBScript doesn't require you to define your variables, but I
don't really want to use it for anything (used to use it a lot in
Classic ASP.)  I believe everyone that Python is great, but some of it
doesn't make sense to me as to why.  Thanks.


From ppearson at nowhere.invalid  Fri May  2 10:45:19 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Fri, 02 May 2008 09:45:19 -0500
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
Message-ID: <ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>

On Thu, 01 May 2008 16:45:51 -0500, Robert Kern <robert.kern at gmail.com> wrote:
>
> pyvtk is not the Python interface to VTK. It is for the
> creation of VTK files.  The vtk(1) command is a Tcl shell
> with the VTK libraries loaded (I believe).  Read the VTK
> documentation for information on the Tcl interface if you
> really want to use it. 

You're right: I don't really want to use it.

> The Python interface is also included in the VTK sources,
> although it might not have been built on your machine. You
> have to enable it when you build VTK itself. The Python
> interface is essentially the same as the C++
> interface. There are Python examples in the VTK source
> tree.

That's the ticket: I don't want to "import pyvtk", I
want to "import vtk" and ape /usr/share/vtk/.../*.py.

Thanks.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From jschroed at gmail.com  Mon May  5 19:34:32 2008
From: jschroed at gmail.com (John Schroeder)
Date: Mon, 5 May 2008 16:34:32 -0700
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
Message-ID: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>

Basically I have some classes like this:


###############################################################################
# 0x01: ModeCommand
###############################################################################
class ModeCommand:
    """This is the Mode Command Packet class."""
    def __init__(self, mode, command, id=0x01):
        """The unspecial init function."""
        self.mode = mode
        self.command = command
        self.id = id

    def RawData(self):
        return [self.id, self.mode, self.command]

    def __getitem__(self, index):
        """[] operator (read): indexes from the byte data."""
        return self.RawData()[index]

    def __str__(self):
        """Print a nice thing."""
        string = "Mode = %d\n" % self.mode + \
                 "Command = %d\n" % self.command + \
                 "ID = %d\n\n" % self.id
        return string

###############################################################################
# 0x02: CallRequest
###############################################################################
class CallRequest:
    """This is the Call Request Packet class.  (Look familiar?)"""
    def __init__(self, service_number, id=0x02):
        """The unspecial init function."""
        self.service_number = service_number
        self.id = id

    def RawData(self):
        return [self.id, self.service_number]

    def __getitem__(self, index):
        """[] operator (read): indexes from the byte data."""
        return self.RawData()[index]

    def __str__(self):
        """Print a nice thing."""
        string = "Service Number = %d\n" % self.service_number + \
                 "ID = %d\n\n" % self.id
        return string


###############################################################################
# Test Code
###############################################################################
x = ModeCommand(mode=1, command=0)
print x[:]
print x
y = CallRequest(service_number=2001)
print y[:]
print y


Which is ok but I had to do this over 100 times.  It is difficult to
maintain and no one else can understand what the heck I did here.  So I was
trying to look a metaclasses to do something fancy like this:

###############################################################################
# 0x01: ModeCommand
###############################################################################
PacketModeCommand = (
    ('name', "ModeCommand"),
    ('id', 0x01),
    ('action', 8), # size in bytes
    ('command', 8),
    )

###############################################################################
# Add some kind of class factory here: (metaclass, type(name, bases, dict)
-> a new type, ???)
###############################################################################
"""???"""


###############################################################################
# Add some kind of class factory here
###############################################################################
"""Hey this would be cool if I had a class just by making the dictionary."""
x = ModeCommand(mode=1, command=0)
print x[:]
print x


So that I could make a dictionary that would basically define my classes on
the fly.  This would be simple enough for everyone to maintain and would
make changes to the format of all the classes relatively simple.  (So far
the only way that I have thought of doing this is will a parsing script but
that would be lame.)

Of course, this becomes more and more complicated as my classes
(representing packets) start having objects of their own and functions that
need to be defined on the fly too... but for now I would be nice to know if
this idea is possible.  Thanks in advance.
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From paul.hankin at gmail.com  Fri May 23 11:33:56 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 23 May 2008 08:33:56 -0700 (PDT)
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <264b0b3b-e755-45f6-8e6f-9e853af9232a@c58g2000hsc.googlegroups.com>

On May 22, 7:21 pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> Is there an easy way to get a list comprehension to produce a flat list of,
> say, [x,2*x] for each input argument?
>
> E.g., I'd like to do something like:
>
> [ [x,2*x] for x in range(4) ]

[x * i for x in xrange(4) for i in xrange(1, 3)]

--
Paul Hankin


From mattheww at chiark.greenend.org.uk  Sun May 25 11:36:10 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 16:36:10 +0100 (BST)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
	<69tcmkF357g9nU1@mid.uni-berlin.de>
Message-ID: <gFl*AhMds@news.chiark.greenend.org.uk>

Diez B. Roggisch <deets at nospam.web.de> wrote:
>I don't see this as something that can be solved by ordering tests - 
>*especially* not on a per-method-level as the OP suggested, because I 
>tend to have test suites that span several files.

unittest already runs multiple test suites in the order you specify
(which is another clue that running tests in order is not evil).

I suspect unittest's choice of alphabetical order for the tests within
a suite is more an artefact of its original Java implementation than
anything else.

-M-


From Lie.1296 at gmail.com  Sun May 18 10:25:00 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 07:25:00 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <c6a0cff9-f0db-4104-95c2-01fa01739621@j33g2000pri.googlegroups.com>

On May 8, 2:06?pm, v4vijayakumar <vijayakumar.subbu... at gmail.com>
wrote:
> When I started coding in python, these two things surprised me.
>
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

The problem is in tab not Python, there is no convention on how many
spaces should tab be treated, python (by default) assumes a tab to be
equal to 8 spaces, but not everyone thinks the same, some code editor
might consider it as 4 spaces or 2 spaces. In most python-oriented
code editor, a tab might be automatically replaced with four spaces.

> 2. python requires to pass "self" to all instance methods

No, python doesn't requires self to be passed to all instance methods,
python passes the "current instance" of a class to the first argument
of a function inside the class, this first argument can be named
anything, although it is traditionally named as self. In other
programming languages, this current instance is implicitly passed (Me
in VB, this in C/C++).

> and I missed ":" often. :)

Not in your smiley though. :)


From ivan.illarionov at gmail.com  Sun May 11 00:26:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 11 May 2008 04:26:10 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <g05sh1$20fo$1@news.mtu.ru>

On Sat, 10 May 2008 18:12:37 -0700, globalrev wrote:

> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of both
> three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '') 
 or str(i) for i in xrange(1, 101)]

-- Ivan


From lists at cheimes.de  Sat May 17 17:05:19 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sat, 17 May 2008 23:05:19 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
Message-ID: <g0nhaf$ee7$1@ger.gmane.org>

Matthieu Brucher schrieb:
> Hi,
> 
> I did not manage to build extension with distutils with Python compiled with
> VS different than 2003. The need for 2003 was hard-coded in distutils.
> You can try building extensions with VS2008 with Scons. This is what I do a
> lot, and everything works fine as long as the interface does not use
> standard structures (like FILE, custom structures are fine) or objects
> allocated in the extension is freed in the extension.

Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
officially supported.

You can compile extensions with a different version of MS VC but it can
get you in a lot of trouble. Every version of the VS Compiler uses its
own C Runtime Library (MSVCRT). You can't share some resources like
allocated memory and FILE* objects between MSVCRTs.

Christian



From Lie.1296 at gmail.com  Wed May 14 00:51:05 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 21:51:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
Message-ID: <5ef77e00-7d9c-44fa-ad4c-dd2b57fe53c2@z16g2000prn.googlegroups.com>

On May 13, 11:36 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ... there's something that feels very unnatural about writing English as code.
>
> I think it is ironic that you think Flaming Thunder is unnatural
> because it is more English-like, when being English-like was one of
> Python's goals: "Python was designed to be a highly readable language.
> It aims toward an uncluttered visual layout, using English keywords
> frequently where other languages use punctuation."http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and...

Python was designed to be _highly readable language_. It aims toward
_uncluttered visual layout_, using _English keywords ... where other
languages uses punctuation_.

Where in that statement, that says Python aims to be English-like? It
only says Python uses English keywords instead of punctuations such as
curly braces, &&, ||, etc which is remotely far away from trying to be
English-like. What I see is that, FT in its current form, aims to be a
readable language, which doesn't concern itself for cluttering the
code's visual layout.

   Verbosity ? Readability

I even remembered someone saying that probably one of Python's goal is
to make you from press only the necessary keystrokes. If I don't
misremember it, it was in Thinking in Python.

> > Just using your "Set ... to" idiom, rather than a
> > regular = assignment, makes things much more wordy, without improving
> > readability.
>
> I think it does improve readability, especially for people who are not
> very fluent mathematically.

But it hurts readability for people who prefers simplicity over
everything and that means you've just violated KISS design principle
(Keep It Simple, Stupid) which is also a persistent feature in UNIX
philosophy (Small is beautiful, Rule of Simplicity), and Python's Zen
(Simple is better than Complex).

> Also, in Python how do you assign a symbolic equation to a variable?
> Like this?
>
> QuadraticEquation = a*x^2 + b*x + c = 0
>

Last time I checked, it was a syntax error there.

> Set statements avoid the confusion of multiple equal signs when
> manipulating symbolic equations:
>
> Set QuadraticEquation to a*x^2 + b*x + c = 0.
>

(snip)


From retreved at gmail.com  Tue May 20 14:53:39 2008
From: retreved at gmail.com (Mark d.)
Date: Tue, 20 May 2008 11:53:39 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>

How about:

mov = open(afile)
line = mov.readline()
...(process your ':' line)
for line in mov.readlines():
   ...


On May 20, 1:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?



From gagsl-py2 at yahoo.com.ar  Thu May  8 05:39:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 06:39:59 -0300
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>
	<8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com>
Message-ID: <op.uatw4xgwx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 07 May 2008 23:29:58 -0300, <clyfish at gmail.com> escribi?:

> On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
> wrote:
>> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>>
>> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
>> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
>> > print p2.stdout.read()
>>
>> > It doesn't work.
>> > Because subprocess.Popen execute "find" like this.
>>
>> > C:\>find \"445\"
>>
>> > It adds a '\' before each '"'.
>> > How to remove the '\'?
>> > Thank you.
>>
>> cannot help with the backslashes but try findstr instead of find
>
> Thank you.
> findstr doesn't need quotes, so it works.

Build the command line yourself -instead of using a list of arguments-. Popen doesn't play with the quotes in that case:

p1 = Popen(['netstat', '-an'], stdout = PIPE) # using list
p2 = Popen('find "445"', stdin = p1.stdout, stdout = PIPE) # using str
print p2.communicate()[0]

-- 
Gabriel Genellina



From none at this.time  Mon May 26 16:57:28 2008
From: none at this.time (Paul Miller)
Date: Mon, 26 May 2008 16:57:28 -0400
Subject: Tkinter = Rodney Dangerfield?
References: <dea2377d-5dca-47e1-a2d4-935bc051e993@34g2000hsz.googlegroups.com>
Message-ID: <3081d$483b2438$3799@news.teranews.com>

On Sun, 17 Feb 2008 11:35:35 -0800, MartinRinehart wrote:

> Tkinter gets no respect. But IDLE's a Tkinter-based app and every
> example I've Googled up shows Tkinter as needing about half as much code
> as wx to do the same job. I'm beginning to Tkinter up my language
> application. Am I making a big mistake?

I like Tkinter quite a bit.  I think it's relatively intuitive, and I 
like the Canvas and Text widgets a lot.

You might check out _Thinking in Tkinter_ at http://www.ferg.org/
thinking_in_tkinter/index.html .  

-- 
code.py: a blog about Python.  http://pythonista.wordpress.com
** Posted from http://www.teranews.com **


From miller.paul.w at gmail.com  Sun May 25 22:29:18 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:29:18 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<mailman.1589.1211766225.12834.python-list@python.org>
Message-ID: <4455e670-d3af-4f26-9eb4-51f46581d5d6@l42g2000hsc.googlegroups.com>

On May 25, 9:43?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> <miller.pau... at gmail.com> wrote in message
>
> news:d7549dfd-6770-4924-8f0c-1746642bd8a4 at k37g2000hsf.googlegroups.com...
> | Is there any place outside the actual C source for Python that has
> | information about the performance of Python's built-in operations?
>
> Unfortunately no. ?Guido does not want to put guarantees in the language
> definition, so there is no urgency to document this. ?An auxiliary doc
> might be accepted. ?But the people who could write such a thing are busy
> doing otherwise. ?Certainly, no one has volunteered to write *and update*
> such.

I see.  Just to be clear, though, I wasn't looking for "guarantees" as
such, like (I believe) the STL sometimes provides.  I was just looking
for some idea of what current implementations' performance
characteristics are.

I suppose I could probably create such a resource.  Keeping it updated
would be another thing entirely, since I don't really want to monitor
every single commit to Python's svn repository.  Hypothetically, if
someone made such a document, do you think it could be arranged for
that person to be notified whenever CPython's implementation changes
to invalidate it?


From dfnsonfsduifb at gmx.de  Fri May 23 18:59:58 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 00:59:58 +0200
Subject: Assignment and comparison in one statement
Message-ID: <esujg5x5u5.ln2@joeserver.homelan.net>

Hello group,

I'm just starting with Python and am extremely unexperienced with it so 
far. Having a strong C/C++ background, I wish to do something like

if (q = getchar()) {
	printf("%d\n", q);
}

or translated to Python:

if (p = myfunction()):
	print p

However, this "assignment and comparison" is not working. What's the 
"Python way" of doing this kind of thing?

Thanks a lot,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From bearophileHUGS at lycos.com  Tue May 20 09:24:02 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:24:02 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de> 
	<3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com>
Message-ID: <aaa0ef8c-e20e-420a-88e0-572c9697b47f@f63g2000hsf.googlegroups.com>

bearophile:
> So you need to store only this 11 byte long string to be able to
> decompress it.

Note that maybe there is a header, that may contain changing things,
like the length of the compressed text, etc.

Bye,
bearophile


From zapwireDASHgroups at yahoo.com  Thu May 22 16:53:16 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 13:53:16 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<5PjZj.78772$%15.70394@bignews7.bellsouth.net>
Message-ID: <33lZj.143344$Tj3.138473@en-nntp-02.dc1.easynews.com>

"inhahe" <inhahe at gmail.com> wrote in message 
news:5PjZj.78772$%15.70394 at bignews7.bellsouth.net...
> i figured out a solution
>
> sum([x,2*x] for x in range(4)],[]) #not tested

Nice... thanks; I probably had seen code using 'sum' to flatten but hadn't 
actually understood how it worked.  After playing around some it's now 
clear...

(Add one more opening bracket to your solution to make the interpreter 
happy -- I know you know this and it was missed only due to not actually 
trying it ought)

---Joel




From casey.mcginty at gmail.com  Thu May 15 04:32:01 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 14 May 2008 22:32:01 -1000
Subject: Making Variable Text Output More Pythonic?
Message-ID: <ae3f58470805150132t323d2360g42d11ed0292453d0@mail.gmail.com>

Hi,

I have some classes that print variable outputs depending on their internal
state, like so:

def __str__(self):
    out = []
    if self.opt1: out += ['option 1 is %s' % self.opt1']
    if self.opt2: out += ['option 2 is %s' % self.opt2']
    ....
    return '\n'.join(out)

Is there any way to make this cleaner?
-------------- next part --------------
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From nik600 at gmail.com  Tue May 27 08:18:46 2008
From: nik600 at gmail.com (nik600)
Date: Tue, 27 May 2008 14:18:46 +0200
Subject: integration with browser
In-Reply-To: <6a2bs6F35a5cmU1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<mailman.1638.1211878217.12834.python-list@python.org>
	<6a2bs6F35a5cmU1@mid.uni-berlin.de>
Message-ID: <9469c3170805270518p631c50acqfbb7713962a34f5a@mail.gmail.com>

On Tue, May 27, 2008 at 2:07 PM, Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Web developers usually check only 3 browser
>> IE
>> FF
>> Opera
>>
>> I know that using an external engine limits the portability of the
>> solutions, but i need something that works exaclty as the browser.
>
> You know that Webkit is the engine behind Safari? And one of the more
> compliant implementations out there - millions of mac-users only use
> Safari.
>
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>

No, i don't know that.

I'll test it immediatly, thanks ;-)

-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From nick at craig-wood.com  Tue May 20 04:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 03:30:05 -0500
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
	<69fbhgF2uih6aU5@mid.uni-berlin.de>
Message-ID: <slrng352qm.7sr.nick@irishsea.home.craig-wood.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
>  On Tue, 20 May 2008 13:57:26 +1000, James A. Donald wrote:
> 
> > The larger the program, the greater the likelihood of inadvertent name
> > collisions creating rare and irreproducible interactions between
> > different and supposedly independent parts of the program that each
> > work fine on their own, and supposedly cannot possibly interact.
> 
>  How should such collisions happen?  You don't throw all your names into
>  the same namespace!?

If you ever did a lot of programming in C with large projects you have
exactly that problem a lot - there is only one namespace for all the
external functions and variables, and macro definitions from one
include are forever messing up those from another.  I suspect the OP
is coming from that background.

However python doesn't have that problem at all due to its use of
module namespaces - each name is confined to within a module (file)
unless you take specific action otherwise, and each class attribute is
confined to the class etc.

>From the Zen of Python "Namespaces are one honking great idea -- let's
do more of those!" - as a battle scarred C programmer I'd agree ;-)

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From sjdevnull at yahoo.com  Fri May 16 13:46:58 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Fri, 16 May 2008 10:46:58 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>

On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
wrote:
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing
> of threads is a cardinal sin and although I have no particular threading
> problem to crack right now I remain interest in the taboo that is thread
> killing. The real world and it's data are messy and imperfect and I can
> think of several scenarios where it could be useful to be able to bump
> off a naughty thread, especially when using/testing unstable 3rd party
> modules and other code that is an unknown quantity.

When possible, use another process _especially_ for things like this.
That way you have more isolation between yourself and the unknown/
unstable code, and killing processes is well-understand and considered
less harmful (precisely because of the greater isolation).

In general, use processes when you can and threads only when you
must.  OS designers spent a lot of energy implementing protected
memory, no sense throwing out a fair chunk of that hard work unless
you actually need to.


From alex.m.gusarov at gmail.com  Thu May 29 07:58:10 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 18:58:10 +0700
Subject: Unit tests?
In-Reply-To: <m2hcch2vfj.fsf@googlemail.com>
References: <mailman.1728.1212060473.12834.python-list@python.org>
	<m2hcch2vfj.fsf@googlemail.com>
Message-ID: <ac6dcb3d0805290458h164222e0l505cf2d5fa06186@mail.gmail.com>

Thx, it's quite enough for a start.
Yes, googling is almost ultimate answer for such questions, sorry for
uneasiness.

> Try googling "python unit test".  I did it, and amongst the first hits
> were:
>
>    * docs.python.org/lib/module-unittest.html
>
>    * http://www.diveintopython.org/unit_testing/index.html
>
> --
> Arnaud


From dmitrey.kroshko at scipy.org  Wed May  7 16:13:40 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Wed, 7 May 2008 13:13:40 -0700 (PDT)
Subject: howto print binary number
Message-ID: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>

hi all,
could you inform how to print binary number?
I.e. something like

print '%b' % my_number

it would be nice would it print exactly 8 binary digits (0-1, with
possible start from 0)

Thank you in advance, D


From gagsl-py2 at yahoo.com.ar  Sun May  4 02:04:27 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 03:04:27 -0300
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <op.ual8hpznx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallower at invalid.com> escribi?:

> Hello,
>
> I made a function that takes a word list (one word per line, text file)
> and searches for all the words in the list that are 'shifts' of
> eachother.  'abc' shifted 1 is 'bcd'
>
> Please take a look and tell me if this is a viable solution.
>
>  def shift(word, amt):
> 	ans = ''
> 	for letter in word:
> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> 	return ans
>
> def fileshift(x):
> 	fin = open(x)
> 	d = {}
> 	for line in fin:
> 		d[line.strip()] = [1]
> 		for i in range(1, 26):
> 			ite = shift(line.strip(), i)
> 			if ite in d:
> 				print ite
>
>
> Any tips/suggestions/critiques greatly appreciated.. I'm trying to
> teach myself Python (and still beginning) and would love any helpful
> info.

First, looking at the code, you're evaluating line.strip() a lot of times; I'd avoid it.
Looks like you're using a dictionary just for the keys - the set type is more adequate here (see http://docs.python.org/lib/types-set.html ). In any case, I'd use a value like None instead of [1]
But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.

-- 
Gabriel Genellina



From maxm at mxm.dk  Tue May  6 05:43:49 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 06 May 2008 11:43:49 +0200
Subject: Python MIDI in 2008
In-Reply-To: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <48202855.4020905@mxm.dk>

Maciej Blizin'ski skrev:
> For the last couple of days, I've been looking for a Python midi
> library. I'm generally interested in sending MIDI events via ALSA. It
> seems like everything out there is pretty old; packages are from 2003
> or 2005.

> existing or very old software packages
> - http://www.mxm.dk/products/public/pythonmidi/ -- no realtime support


This is old in the sense that it has been a while since I wrote it. But 
it is virtually bug free, so nothing much is happening.

The midi standard does not change so there is no real reason to 
change/upgrade it.

It is currently being used by the very popular "frets on fire"

http://fretsonfire.sourceforge.net/documentation/source/


It does not have real time support even though I did write it with that 
support in mind. I just never got around to write it as I did not need 
it myself.


I also developed it on Windows and I found it to be a bore to get real 
time midi working.

It would probably be easier now that I am on Linux.


Well I just thought I would mention that it is not dead. Merely middle aged.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From tjreedy at udel.edu  Tue May 27 23:30:51 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 23:30:51 -0400
Subject: When was feature FOO added to Python? (was: decorators when?)
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<87zlqbs60b.fsf@benfinney.id.au>
Message-ID: <g1ijla$5dt$1@ger.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:87zlqbs60b.fsf at benfinney.id.au...
| David C. Ullrich <dullrich at sprynet.com> writes:
|
| > What version added decorators (using the @decorator syntax)?
| >
| > (Is there a general way I could have found out the answer myself?)
|
| For standard library features, the documentation for a module
| <URL:http://www.python.org/doc/lib/> usually says "(New in 2.4)" or
| "(Changed in 2.4)" or the like for features that appeared in a
| particular version. I think this is manually done by the
| documentation maintainers, though.
|
| For features of the language (like decorators), the language reference
| <URL:http://www.python.org/doc/ref/> is the place that *describes* the
| features; but I don't see any similar "(New in 2.4)" annotations, so
| e.g. <URL:http://www.python.org/doc/ref/function.html> doesn't mention
| when the decorator syntax appeared in the language.
|
| Any documentation maintainers reading: Please consider updating the
| documents to give this useful "(New in 2.x)" or "(Changed in 2.x)"
| annotation for just such a situation.
|
| You can get closer to the answer by browsing the "What's New in
| Python" <URL:http://www.python.org/doc/2.4/whatsnew/> documents by
| version.

Missing 'New' or 'Changed' annotations might be considered doc bugs. 
Certainly there should be one for decorators.  Anyone who wants such 
omissions fixed should file a report on bugs.python.org listing the 
*specific* annotations you think should be added and where.  Cite which 
documents you used as sources so they can be checked.  This is something 
that a new volunteer could do, since it does not need the special skill of 
older volunteers.

Note 1: probably best to check against 2.6 docs, as I am not sure that 
fixes will go back 2.5.

Note 2: the 3.0 docs start with a 'clean slate'.  All such annotations are 
or should be wiped.  But changes in 3.1 will be annotated as usual.

TJR





From usenet1.3.CalRobert at SpamGourmet.Com  Thu May  8 06:25:54 2008
From: usenet1.3.CalRobert at SpamGourmet.Com (Robert Maas,)
Date: Thu, 08 May 2008 03:25:54 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <rem-2008may08-005@yahoo.com>

> From: "xah... at gmail.com" <xah... at gmail.com>
> the importance of naming of functions.

I agree, that's a useful consideration in the design of any system
based on keywords, such as names of functions or operators.
(I'm not using "keyword" in the sense of a symbol in the KEYWORD package.)

> the naming in Mathematica, as Stephen Wolfram implied in his blog
> above, takes the perspective of naming by capturing the essense, or
> mathematical essence, of the keyword in question.

For concepts adapted from mathematics, that naming meta-convention makes sense.
For concepts adapted from data-processing, it's not so clearly good.

> lambda, widely used as a keyword in functional languages, is
> named just Function in Mathematica.

That makes sense, but then what does Mathematica call the special
operator which Common Lisp calls Function? Or is that not provided,
and the programmer must case-by-case handcode what they really mean?
(function foo) == (symbol-function 'foo) ;so FUNCTION not really needed there
(function (lambda (x) (+ x y)) ;y is a lexical variable to be encapsulated
                               ; into the resultant closure
How would you do something like that in mathematica?

> Module, Block, in Mathematica is in lisp's various let*
> The lisp's keywords let, is based on the English word let.

No, that's not correct. It's based on the mathematical use of "let":
Let R be the complete ordered field of real numbers.
Let S be the subset of R consisting of numbers which satisfy
  equations expressed in transcendental functions with rational
  parameters.
Prove that S is dense in R.
(Yeah, the question is trivial, but I'm just showing how "let" might be used.)

I see nothing wrong with LET used in that way in Lisp.
Bind would be good too.
I don't like Module or Block at all, because those words convey
nothing about binding some temporary local name to represent some
globally-definable concept, and they actually mis-lead because
module can mean either something like a vector space over a ring,
or a set of functions/methods that serve some small problem domain
within a larger library of functions/methods, or a set of lectures
on a single-topic within a curriculum, while Block sounds more like
just some random consecutive interval of statements rather having
nothing specific to do with bindings. TAGBODY or PROGN would be
more properly called Block perhaps.

> One easy way to confirm this, is taking a keyword and ask a wide
> audience, who doesn't know about the language or even unfamiliar of
> computer programing, to guess what it means.

That is a biassed question because the only options are the words
you choose in advance. Better would be to reverse the question: Ask
random people on the street what they would like to call these
concepts:
1 You set up a temporary relation between a name and some datum,
   such that all references to that name give you that same datum.
   For example you might set up the name 'n' to temporarily mean 5.
   Fill in the missing word: (word (n 5) <say "ouch" n times>)
2 You set up a rule by which one step of data-processing is performed,
   taking input to produce output. For example you set up a rule by
   which the input value is divided by two if it's even but
   multiplied by three and then 1 added if it was odd.
   Fill in the missing word: (word (n) <if n even n/2 else 3*n+1>)
3 You set up a rule as above, but also give it a permanent name.
   Fill in the missing word: (word collatz (n) <if n even n/2 else 3*n+1>)
4 You already have a rule that takes two input data and produces one output.
     (oldword foo (x y) <absolute value of difference between x and y>)
   You now know one of the two inputs, and that info won't change for a while,
   and you hate to keep repeating it. So you want to define a new rule
   that has that one known parameter built-in so that you only have
   to say the *other* parameter each time you use the new rule.
   Fill in the missing newword: (newword foo <x is fixed as 3>)
So I'd choose words: 1=let 2=lambda 3=defun 4=curry.
What words would a typical man on the street choose instead?

> The name regex has done major hidden damage to the computing industry

I have my own gripe against regular expressions ("regex" for short).
I hate the extremely terse format, with horrible concoctions of
escape and anti-escape magic characters, to fit within Unix's
255-character limit on command lines, compared to a nicely
s-expression nested notation that would be possible if regex hadn't
entrenched itself so solidly.


From PatrickMinnesota at gmail.com  Wed May 14 20:53:30 2008
From: PatrickMinnesota at gmail.com (PatrickMinnesota)
Date: Wed, 14 May 2008 17:53:30 -0700 (PDT)
Subject: Passing functions around and executing
Message-ID: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>

I've been reading the docs and looking for an answer and seem stuck.
I'm either not looking in the right places or not understanding what
I'm reading.

I have a bunch of functions.  I want to put them in a list.  Then I
want to pass that list into another function which does some setup and
then loops through the list of passed in functions and executes them.
Some of them need arguments passed in too.

Can someone point me to where to read about this?  I know it's do-able
since it's basically doing something like a callback would do.

Thanks for any pointers.


From __peter__ at web.de  Fri May 30 11:41:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 May 2008 17:41:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <g1p781$2j1$00$1@news.t-online.com>

Josep wrote:

> I'm playing with an application framework (or kinda) that's developed
> with python, and it throws this error:
> 
> 
>> File
>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>> line 281, in execute
>>     sql = unicode(sql, self.Encoding)
>> LookupError: unknown encoding: utf_8_euro
> 
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue. As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.
> 
> My Python version is 2.5.2, Ubuntu Hardy .deb package.

Python might get confused by an @EURO suffix in the locale:

$ LANG=de_DE.UTF-8 at EURO
$ python -c"import locale; print locale.getdefaultlocale()"
('de_DE', 'utf_8_euro')

Try setting the LANG environment variable to something like

$ LANG=de_DE.UTF-8
$ python -c"import locale; print locale.getdefaultlocale()"
('de_DE', 'UTF8')

before you run your program (use ca_ES or whatever you need instead of
de_DE).

Peter


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 08:23:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 14:23:34 +0200
Subject: default object comparison considered harmful?
In-Reply-To: <ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <482d7cc6$0$10756$426a34cc@news.free.fr>

Kay Schluehr a ?crit :
> On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> Hello all,
>>
>> Yesterday we found the cause of a bug that has caused problems for a long time.
>> It appeared to be the following:
>>
>> class A(object):
>>     pass
>>
>> print min(1.0, A())
>>
>> which is accepted by Python even though the A() object is not numerical in
>> nature.
>>
>> The cause of this behavior seems to be the compare operation of the object
>> class.
>>
>> Is there a way to disable this behavior in Python (other than deriving a new
>> 'object-like' class that doesn't do comparisons?)
>>
> Are you sure you don't want to use a statically typed language that
> captures all type errors just by inspecting your source code?

This is not necessarily a static vs dynamic typing problem. The 
following code will raise a TypeError for very good reasons:

    print 1.0 + A()


From jorge.vargas at gmail.com  Tue May  6 05:07:53 2008
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Tue, 6 May 2008 05:07:53 -0400
Subject: config files in python
In-Reply-To: <482017EA.40706@egenix.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
	<482017EA.40706@egenix.com>
Message-ID: <32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>

On Tue, May 6, 2008 at 4:33 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>
> On 2008-05-06 01:16, Matimus wrote:
>
> > On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
> >
> > > Hi,
> > >  In my application, I have some configurable information which is used
> > > by different processes. currently I have stored configration in a
> > > conf.py file as name=value pairs, and I am importing conf.py file to
> > > use this variable. it works well
> > >
> > > import conf
> > > print conf.SomeVariable
> > >
> > > but if I need to change some configuration parameteres,  it would need
> > > me to restart processes.
> > >
> > > I want to store this data in some conf file (txt) and would like to
> > > use it same way as I am using these variables as defined in py
> > > files.
> > >
> > > one solution I can think of is writing data as a dictionary into conf
> > > file. and then by reading data, apply eval on that data. and update
> > > local dict? but this is not a good solution....
> > >
> > > any pointers?
> > >
> > > Sandip
> > >
> >
> > I would load the configuration file using `imp.load_source'. This
> > allows you to load the config file by filename, and gets away from the
> > issue of accidentally importing a file somewhere else in pythons
> > search path. Also, calling imp.load_source will reload the module when
> > called a second time.
> >
>  >
>
> > http://docs.python.org/lib/module-imp.html
> >
>
>  Why not just use execfile() ?
>
>  http://www.python.org/doc/2.2.3/lib/built-in-funcs.html
>
that is very bad for this case, from what he is suggesting this is a
server install so you are basically giving a vector of remote code
execution (same with the first approach) but then execfile has the
issue that it goes into your current namespace possibly creating a
namespace crash which is even worst because an attacker can shallow
say your auth module with something that will just return.
>
>
>
> > [conf.py]
> > a = 1
> > b = 2
> > class c:
> >    a = "hello"
> >    b = "world"
> > [/end conf.py]
> >
> >
> > >
> > > >
> > > > > conf = imp.load_source("conf", "./conf.py")
> > > > > conf.a
> > > > >
> > > >
> > >
> > 1
> >
> > >
> > > >
> > > > > conf.b
> > > > >
> > > >
> > >
> > 2
> >
> > >
> > > >
> > > > > conf.c.a
> > > > >
> > > >
> > >
> > 'hello'
> >
> > >
> > > >
> > > > > conf.c.b
> > > > >
> > > >
> > >
> > 'world'
> >
> >
> >
> > There are so many ways potential solutions to your problem that,
> > without any more details, it is hard to suggest anything.
> >
> > Here are some potential solutions:
> >
> > ConfigParser - module for handling ini files
> > xml - several built-in modules for handling XML files
> > sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
> > for config data)
> > windows registry  - _winreg module
> > pickle - serialize python objects
> > marshal - similar to pickle, only works for simple objects
> >
> > Those are just the built-in solutions. If you wanna look at 3rd party
> > solutions, prepare for overload. The number of alternative INI parsers
> > alone is staggering.
> >
> > Also, there are many ways to organize your data and use a solution
> > similar to what you are already using.
> >
> > I guess what I'm trying to say is... don't roll your own, it would be
> > a waste of time, this problem has been solved 100s of times. That is,
> > unless you want to do it for fun.
> >
> > Matt
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>  --
>  Marc-Andre Lemburg
>  eGenix.com
>
>  Professional Python Services directly from the Source  (#1, May 06 2008)
>  >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>  >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>  >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
>  ________________________________________________________________________
>
>  :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>
>
>    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>            Registered at Amtsgericht Duesseldorf: HRB 46611
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From renesd at gmail.com  Fri May  2 05:47:26 2008
From: renesd at gmail.com (illume)
Date: Fri, 2 May 2008 02:47:26 -0700 (PDT)
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C 
	libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com> 
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
	<mailman.437.1209681507.12834.python-list@python.org>
Message-ID: <86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>

On May 2, 8:37?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "illume" <ren... at gmail.com> wrote in message
>
> news:372ae26a-d772-4182-aa4b-64330626d60f at l25g2000prd.googlegroups.com...
> | Ah, why is that?
>
> Were any of the reasons given inhttp://www.python.org/dev/peps/pep-0011/
> unclear?
> It appears you are already aware of MS's non-support of Win98


Hello,

It seems the main reason is for ease of maintenance.  However the Pep
title is misleading with regards to win9x+winMe+win2k - which is where
my confusion, questions and argument came from.
"Title: 	Removing support for little used platforms"

There are still *lots* of people who still use win95, 98, 98se, me,
and win2k - as shown by the statistics I linked to in a previous
post.  If you want more statistics about the number of people using
what OS they are fairly easy to find with a search engine.  One day
win9x will be finally dead, but that's not yet(and the w3c stats show
it's usage actually increasing in march!).

It is probably way too late in the process to put back code - and as
you say no python developers have volunteered.  So I won't argue any
more for it to come back.

We'll just have to recommend a different python implementation than
2.6 or 3.0 for people who want to support people with these old
computers.


cheers,


From deets at nospam.web.de  Tue May 13 10:46:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 16:46:32 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <68tnvfF2t99pnU1@mid.uni-berlin.de>

Dave Parker wrote:

>> Don't let yourself be irritated by castironpi
> 
> I'm not the sort to get irritated by anyone.  There is value in all
> interaction.  Flaming Thunder is itself the averaging of interactions
> with many computer languages and conversations with many people, so as
> to create a language that allows people to tell a computer what they
> want it to do, without having to know very much about how the computer
> does it.
> 

Well, if your actual goal is to create traffic to promote your own product
(I presume so from your mailaddress) then I'm not surprised that you not
*really* care who is responding how... 

Diez


From darcy at druid.net  Wed May 28 06:43:10 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 28 May 2008 06:43:10 -0400
Subject: A quick question
In-Reply-To: <g1jbtt+bf6m@eGroups.com>
References: <g1jbtt+bf6m@eGroups.com>
Message-ID: <20080528064310.6b2d4f6e.darcy@druid.net>

On Wed, 28 May 2008 10:25:01 -0000
"James" <cobrocks at msn.com> wrote:
> Hey everyone,
> 
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  
> How can I get these integers to print as letters?  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  

Ignore my previous message.  Too early.  Here is your script:

word = raw_input("Type a word:")
for i in range(len(word), 0, -1):
    print word[i]

Sorry about that.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From vijayakumar.subburaj at gmail.com  Fri May  9 09:37:30 2008
From: vijayakumar.subburaj at gmail.com (v4vijayakumar)
Date: Fri, 9 May 2008 06:37:30 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
Message-ID: <53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>

On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> v4vijayakumar a ?crit :
>
> > When I started coding in python, these two things surprised me.
>
> > 1. my code is inconsistently indented with the combination of tabs and
> > spaces. Even lines looked intended, but it is not.
>
> Then you have a problem with your code editor - not with Python.
>

Editors can not be wrong. :)

I think there should be some way to say python compiler, to consider
tab and two blank spaces equal, when tab space = 2.


From kyosohma at gmail.com  Fri May  9 10:25:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:25:40 -0700 (PDT)
Subject: Can I "delete" the namespace of a module that i import?
References: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>
Message-ID: <1072bcd6-b30b-4e51-b79a-f7e9cfd80976@e39g2000hsf.googlegroups.com>

On May 9, 9:06?am, "gbin,Zhou" <scutee... at gmail.com> wrote:
> Hi,all.
> ? ?I see from "http://docs.python.org/tut/node11.html" that "Name
> spaces are created at different moments and have different lifetimes.
> The namespace containing the built-in names is created when the Python
> interpreter starts up, and is never deleted. The global namespace for
> a module is created when the module definition is read in; normally,
> module namespaces also last until the interpreter quits."
> ? ?So can I "delete" the namespace of a module that i import?
> ? ?thanks.

I did some searching and haven't found much. The closest I've found so
far is this old thread:

http://mail.python.org/pipermail/python-list/2000-February/022526.html

You might look at IDLE's code to see what it does when you tell it to
"restart" too.

Good luck!

Mike


From deets at nospam.web.de  Wed May 28 15:52:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 21:52:26 +0200
Subject: Threads and import
In-Reply-To: <0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
Message-ID: <6a5rfvF36c899U1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> rsoh.woodho... at googlemail.com schrieb:
>>
>>
>>
>>> Hi,
>>> I'm trying to work out some strange (to me) behaviour that I see when
>>> running a python script in two different ways (I've inherited some
>>> code that needs to be maintained and integrated with another lump of
>>> code). The sample script is:
>>> # Sample script, simply create a new thread and run a
>>> # regular expression match in it.
>>> import re
>>> import threading
>>> class TestThread(threading.Thread):
>>>     def run(self):
>>>         print('start')
>>>         try:
>>>             re.search('mmm', 'mmmm')
>>>         except Exception, e:
>>>             print e
>>>         print('finish')
>>> tmpThread = TestThread()
>>> tmpThread.start()
>>> tmpThread.join()
>>> import time
>>> for i in range(10):
>>>     time.sleep(0.5)
>>>     print i
>>> # end of sample script
>>> Now if I run this using:
>>> $ python ThreadTest.py
>>> then it behaves as expected, ie an output like:
>>> start
>>> finish
>>> 0
>>> 1
>>> 2
>>> ...
>>> But if I run it as follows (how the inherited code was started):
>>> $ python -c "import TestThread"
>>> then I just get:
>>> start
>>> I know how to get around the problem but could someone with more
>>> knowledge of how python works explain why this is the case?
>> Works for me. And I don't see any reason why it shouldn't for you -
>> unless you didn't show us the actual code.
>>
>> Diez
> 
> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> on Ubuntu 7.10. Which version of python/what platform were you using?

mac-dir:/tmp deets$ python
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>>


But I doubt this changes anything.

Diez


From arnodel at googlemail.com  Tue May 20 13:12:14 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 18:12:14 +0100
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <m2lk247vdd.fsf@googlemail.com>

Zack <zhalbrecht at gmail.com> writes:

> Given a bunch of objects that all have a certain property, I'd like to
> accumulate the totals of how many of the objects property is a certain
> value. Here's a more intelligible example:
>
> Users all have one favorite food. Let's create a dictionary of
> favorite foods as the keys and how many people have that food as their
> favorite as the value.
>
> d = {}
> for person in People:
>     fav_food = person.fav_food
>     if d.has_key(fav_food):
>         d[fav_food] = d[fav_food] + 1
>     else:
>         d[fav_food] = 1

This is fine.  If I wrote this, I'd write it like this:

d = {}
for person in people:
    fav_food = person.fav_food
    if fav_food in d:
        d[fav_food] += 1
    else:
        d[fav_food] = 1

You can use d.get() instead:

d = {}
for person in people:
    fav_food = person.fav_food
    d[fav_food] = d.get(fav_food, 0) + 1

Or you can use a defaultdict:

from collections import defaultdict
d = defaultdict(int) # That means the default value will be 0
for person in people:
    d[person.fav_food] += 1

HTH

-- 
Arnaud


From salgerman at gmail.com  Tue May 13 09:23:33 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 06:23:33 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
Message-ID: <3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>


hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
the packages I was using because they were in the "egg" form.  I was
hoping Installer could...then again, I don't know how long ago
Installer was written and whether eggs came along after that...

Regarding the word 'copy'...will you please enlighten me? were you
serious? is it really banned (around here)? I mean, I thought we were
talking about an open application which, for as long as you pass along
the (GNU,GPL) license, you are allowed to provide it to other people.

So, then, allow me to ask the real question:  how do I go about
deploying a Python application to somebody who has nothing (python nor
related modules) where my application uses modules from Lib/site-
packages that are in "egg" form?

Regards,

gsal


From mishok13 at gmail.com  Wed May  7 03:54:40 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Wed, 7 May 2008 10:54:40 +0300
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <48215537.100@promsoft.ru>
References: <48215537.100@promsoft.ru>
Message-ID: <192840a00805070054o22eb17ach519098da27258269@mail.gmail.com>

2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
> Subj is bag?
>
>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
> (Intel)] on win32
>  Type "help", "copyright", "credits" or "license" for more information.
>  >>> from datetime import datetime
>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>  '2008_05_07 12_30_22.csv'
>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>  Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>  TypeError: strftime() argument 1 must be str, not unicode

Unicode and str objects are not the same. Why do you think that this
is a bug? Anyway, you can always use 'encode' method of unicode
objects:

In [2]: datetime.today().strftime('%Y-%m-%d %H-%M-%S.csv')
Out[2]: '2008-05-07 10-49-24.csv'

In [3]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv')
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)

/home/mishok/doc/python/<ipython console> in <module>()

TypeError: strftime() argument 1 must be str, not unicode

In [4]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv'.encode('utf-8'))
Out[4]: '2008-05-07 10-51-19.csv'

No offence, but have you read the tutorial?

>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From florencio.cano at gmail.com  Thu May  8 03:14:24 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Thu, 8 May 2008 09:14:24 +0200
Subject: How to gather information about the system hardware?
Message-ID: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>

Hi,
I'm looking for a method of gathering information about the system
hardware and software installed using Python. I would like to do it in
UNIX and in Windows. I think that it would be good in Windows to look
in the registry and be able to parse and search it. Any pointer to
information would be appreciated.
Thanks.


From workitharder at gmail.com  Tue May 27 17:49:12 2008
From: workitharder at gmail.com (bukzor)
Date: Tue, 27 May 2008 14:49:12 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
	<p%EZj.19189$255.2014@bignews8.bellsouth.net>
	<ce386e5a-514e-4faf-a679-138f14f9a7e4@t54g2000hsg.googlegroups.com>
Message-ID: <4787d8f0-c147-4a6a-8cc7-e354ce41a33a@j22g2000hsf.googlegroups.com>

On May 23, 1:17 pm, bukzor <workithar... at gmail.com> wrote:
> On May 23, 12:35 pm, "inhahe" <inh... at gmail.com> wrote:
>
>
>
> > "
> > I wish this worked:>>> def main(a,b,*argv): pass
> > >>> options['argv'] = argv
> > >>> main(**options)
>
> > TypeError: main() got an unexpected keyword argument 'argv'
> > "
> > -----
> > I was thinking about that exact same thing actually.  Except that I was
> > thinking you might want it like this, otherwise it could be ambiguous:
>
> > >>> def main(a,b,*argv): pass
> > >>> options['*argv'] = argv
> > >>> main(**options)
>
> > Weird I know, to put the * operator inside the string.  I suppose the
> > necessity of doing that just shows why it wasn't implemented in the first
> > place.  But still, it would be neat...
>
> > Also, of course, you could then do
> > main(*argv=[2,3])
>
> > or rather
>
> > main(*argv=[3,4],a=1,b=2) #in random order
>
> Yes I think something like that would be an improvement. I wonder if
> anyone would help me write a PEP... It might not be too hard to pass
> since it would be compatible with all existing code. I'd be willing to
> produce a patch against python2 or py3k.
>
> I don't see that leaving off the * makes it ambiguous, since there can
> only be one argument with that name:
> def f(args, *args): pass
> SyntaxError: duplicate argument 'args' in function definition

I guess that's a no...


From casey.mcginty at gmail.com  Wed May 21 06:44:50 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 21 May 2008 00:44:50 -1000
Subject: Organizing a Python project
In-Reply-To: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>

> I'm starting work on what is going to become a fairly substantial
> Python project, and I'm trying to find the best way to organize
> everything.


I'd like to add a follow up question.  Are there any idioms for writing
/usr/bin scripts to run installed package modules? For this I am assuming a
simple case where there is a single package with one or more modules all
making up a single application. A have a few thoughts, please correct me if
I'm wrong.

1. Script code should be as basic as possible, ideally a module import line
and function or method call. This is so you don't have to worry about script
errors and/or increase startup time because a *.pyc file can not be store in
/usr/bin.

2. In the top of your package directory it is typical to have a module name
'_package.py'. This is ideally where the main command line entry point for
the package code should be placed.

3. In the _package.py file you should add a "class Package" that holds most
or all of the application startup/execution code not designated to other
modules. Then run the application with the call to "Package()", as in

    if __name__ == '__main__':
       Package()

Some other questions I have are:
A. What should go in the package __init__.py file? For example, a doc
describing the program usage seems helpful, but maybe it should have info
about your modules only? Assuming the __init__.py code gets executed when
you import the module, you could place part or all of the application code
here as well. I'm guessing this is not a good idea, but not really
convinced.

B. How should you import your _package.py module into your /usr/bin script.
Is there a way to use an '__all__' to simplify this? Again this goes back to
question A, should there be any code added to __init__.py?

C. If you have a _package.py file as the application entry, is it worth it
to place most of the application code in a class, described in part 3?

D. When I import a package._package module, I get a lot of junk in my
namespace. I thought an '__all__' define in the module would prevent this,
but it does not seem to work.

Thanks for reading,
- Casey
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From bruno.desthuilliers at gmail.com  Wed May 14 17:41:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:41:58 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
Message-ID: <45b8aef5-50d9-4b83-98c0-104dddd03d26@y38g2000hsy.googlegroups.com>

On 13 mai, 18:36, Dave Parker <davepar... at flamingthunder.com> wrote:
(snip)

> Also, in Python how do you assign a symbolic equation to a variable?
> Like this?
>
> QuadraticEquation = a*x^2 + b*x + c = 0

quadratic_equation = lambda x, b, c : a*(x**2) + b*x + c == 0

or if x, b and c are supposed to be captured from the current
namespace:

quadratic_equation = lambda : a*(x**2) + b*x + c == 0

> Set statements avoid the confusion of multiple equal signs when
> manipulating symbolic equations:

using '=' for assignement and '==' for equality test does the same
thing. And it's a very common pattern in programming languages.



From hdante at gmail.com  Tue May 13 10:34:09 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 07:34:09 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
Message-ID: <7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>

On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > Don't let yourself be irritated by castironpi
>
> > I'm not the sort to get irritated by anyone. ?There is value in all
> > interaction.
>
> Not this interaction, I'm afraid. ?What irritates *me* about
> castironpi is that he uses a chatterbot to clutter up the threads
> here. ?If you go back to his postings from a year ago (and selected
> ones since), his comments are coherent and sensible. ?These rambling
> stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> his idea of a joke. ?But they are certainly not worth your time in
> trying to respond to them.
>
> -- Paul

 I don't think castironpi so annoying that I should filter its
messages. It would be enough if he were better tuned. He is much
smarter than the emacs shrink, for example. :-P

 The "Flaming Thunder" looks promising, but without being free
software, it's unlikely it will create a large developer community,
specially considering both free general purpose and scientific
programming languages.


From johnjsal at NOSPAMgmail.com  Mon May 12 23:42:43 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:42:43 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
Message-ID: <48290e33$0$11631$607ed4bc@cv.net>

Martin v. L?wis wrote:

> OTOH: do you plan to do any programming at all, in your
> life? If yes: consider using Python for every programming
> task you'll encounter

Yeah, I do plan to use it for fun (if I can think of little projects to
work on!), and Python is definitely the only language I care to learn.
It's simple and fun to use, which is why I hate that I don't have more
reasons to use it! :)


From aguirre.adolfo at gmail.com  Sun May  4 18:01:06 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Sun, 4 May 2008 15:01:06 -0700 (PDT)
Subject: Can I install Python 2.4 and 2.5 ?
Message-ID: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>

I am reviewing various visualization programs (Scipy, PYGNL, etc) and
IDE?s. Some run on Python 2.4 others in 2.5.

Can I have both installed at the same time if I don?t run them
concurrently?

Now in Windows XP soon on Ubuntu 8

Appreciating your help,

Adolfo


From duncan.booth at invalid.invalid  Sun May 18 08:57:04 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 May 2008 12:57:04 GMT
Subject: secret code?
References: <5bc52ed9-855e-4569-b3bd-a0c1ab6941d7@k37g2000hsf.googlegroups.com>
Message-ID: <Xns9AA28DEDE6E93duncanbooth@127.0.0.1>

Sanoski <Joshuajruss at gmail.com> wrote:

> What would you guys says about this secret code? The key was
> apparently lost. The guy never sent it, and he was never seen again.
> It must stand for letters in the alphabet, but it almost looks like
> trajectory tables. I don't know. What do you guys think?
> 
> http://i243.photobucket.com/albums/ff273/ezname420/code.jpg
> 
Try Googling for 'Beale Cipher'.


From mario at ruggier.org  Sat May 31 06:57:56 2008
From: mario at ruggier.org (Mario Ruggier)
Date: Sat, 31 May 2008 12:57:56 +0200
Subject: ValueError: unknown locale: UTF-8
Message-ID: <305017A1-F5F5-47E2-BB20-0B2A1FD4C5E8@ruggier.org>

On OS X 10.5.2 :

$ python
Python 2.5.1 (r251:54863, Feb  4 2008, 21:48:13)
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import locale
 >>> locale.getdefaultlocale()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/locale.py", line 441, in getdefaultlocale
     return _parse_localename(localename)
   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/locale.py", line 373, in _parse_localename
     raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: UTF-8
 >>>

This is on open bug or is there more to it?

Regards, mario


From wizzardx at gmail.com  Sun May  4 17:12:13 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 23:12:13 +0200
Subject: unicode newbie - printing mixed languages to the terminal
Message-ID: <18c1e6480805041412s37085709q511eb3a3c86e36c5@mail.gmail.com>

Hi list.

I've never used unicode in a Python script before, but I need to now.
I'm not sure where to start. I'm hoping that a kind soul can help me
out here.

My current (almost non-existant) knowledge of unicode:

>From the docs I know about the unicode string type, and how to declare
string types. What I don't understand yet is what encodings are and
when you'd want/need to use them. What I'd like is to just be able to
print out unicode strings in mixed languages, and they'd appear on the
terminal the same way they get shown in a web browser (when you have
appropriate fonts installed), without any fuss.

Here is an example of how I'd like my script to work:

$ ./test.py

Random hiragana: <some jp characters>
Random romaji: kakikukeko

Is this possible?

>From my limited knowledge, I *think* I need to do to things:

1) In my Python script, run .encode() on my unicode variable before
printing it out (I assume I need to encode into Japanese)

Question: How does this work when you have multiple languages in a
single unicode string? Do you need to separate them into separate
strings (one per language) and print them separately?

Or is it the case that you can (unlike a web browser) *only*
display/print one language at a time? (I really want mixed language -
English AND Japanese).

2) Setup the terminal to display the output. From various online docs
it looks like I need to set the LANG environment variable to Japanese,
and then start konsole (or gnome-terminal if that will work better).
But again, it looks like this limits me to 1 language.

If what I want to do is very hard, I'll output html instead and view
it in a web browser. But I'd prefer to use the terminal instead if
possible :-)

Thanks in advance.

David.


From notontheweb at noisp.com  Wed May  7 23:22:12 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 03:22:12 GMT
Subject: web client in Python Q
In-Reply-To: <mailman.732.1210209312.12834.python-list@python.org>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
	<mailman.732.1210209312.12834.python-list@python.org>
Message-ID: <DluUj.663832$us.393032@fe04.news.easynews.com>

Thanks, Jerry!  That's so cool.  I actually managed to blunder through 
with sockets and so forth, but this is much cleaner.

I wonder why it does not work with

  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW

I get a connection reset by peer error.


From notbob at nothome.com  Tue May  6 14:07:51 2008
From: notbob at nothome.com (notbob)
Date: Tue, 06 May 2008 18:07:51 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>
Message-ID: <X71Uj.15556$pI4.12568@fe101.usenetserver.com>

On 2008-05-06, Jeffrey Froman <jeffrey at fro.man> wrote:

> Nice to see another Slackware user around here!

Likewise.  ;)


> That's correct. A function doesn't generally *do* anything until it is
> called. Here, it is only defined. The only thing this function does when
> called is to print the value of bruce twice.

I suspected as much.  It was a bit confusing, but I get it now.  


> Functions are objects too, and this is a printed representation of that
> function object. It still hasn't been "called" at this point.

Good to know.  Thnx.   


> other python "special" attributes, it starts and ends with TWO underscores.

...as Alex also pointed out.  I didn't notice that.  Thnx.


> You are correct to create this script yourself from scratch.

Do python scripts require the:

 #!/usr/bin/env python
 
....line at the beginning of every script or just the .py file extension?  I
see examples both ways, with and without.


> Your module files, i.e., chap03.py, should be in one of the directories on
> that path.

Gotchya.   

> "from" modifies a *module* name, not a path component. So "from module
> import one_function, another_function". This allows you to use one_function
> without referencing it through the imported module name. In other words,
> these two are equivalent:
>
>>>> import chap03
>>>> chap03.print_twice()
>
> and:
>
>>>> from chap03 import print_twice
>>>> print_twice()
>
> In the above examples, "chap03" is the *module* file, chap03.py.

mmmmm..... that's still a bit much to wrap my feeble brain around, but I get
your drift.  I'm still working on the basic function concept as python uses
it.  But, I found two more websites that explain it better and I think I
pretty much get it, now.  Thank you, and the others, for your help.  It's
very much appreciated.  

nb

Slackware:  simplicity through transparency



From Joshuajruss at gmail.com  Sat May 17 00:43:46 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Fri, 16 May 2008 21:43:46 -0700 (PDT)
Subject: how would you...?
Message-ID: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>

I'm pretty new to programming. I've just been studying a few weeks off
and on. I know a little, and I'm learning as I go. Programming is so
much fun! I really wish I would have gotten into it years ago, but
here's my question. I have a longterm project in mind, and I wont to
know if it's feasible and how difficult it will be.

There's an XML feed for my school that some other class designed. It's
just a simple idea that lists all classes, room number, and the person
with the highest GPA. The feed is set up like this. Each one of the
following lines would also be a link to more information about the
class, etc.

Economics, Room 216, James Faker, 3.4
Social Studies, Room 231, Brain Fictitious, 3.5

etc, etc

The student also has a picture reference that depicts his GPA based on
the number. The picture is basically just a graph. I just want to
write a program that uses the information on this feed.

I want it to reach out to this XML feed, record each instance of the
above format along with the picture reference of the highest GPA
student, download it locally, and then be able to use that information
in various was. I figured I'll start by counting each instance. For
example, the above would be 2 instances.

Eventually, I want it to be able to cross reference data you've
already downloaded, and be able to compare GPA's, etc. It would have a
GUI and everything too, but I am trying to keep it simple right now,
and just build onto it as I learn.

So lets just say this. How do you grab information from the web, in
this case a feed, and then use that in calculations? How would you
implement such a project? Would you save the information into a text
file? Or would you use something else? Should I study up on SQLite?
Maybe I should study classes. I'm just not sure. What would be the
most effective technique?


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 19:02:33 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 19:02:33 -0400
Subject: SImple python print question
In-Reply-To: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
Message-ID: <LnoXj.10564$Xv3.10250@bignews4.bellsouth.net>

amit.uttam at gmail.com wrote:
> Hey there,
> 
> I have a simple question about python print statement. Take the
> following code snippet for example...
> 
> 1 print "-#- executing: %s" % section,
> 2 tests[section] = test.testcase(name=config.get(section,'name'))
> 3 tests[section].runTest()
> 4 printStatus(tests[section])
> 
> Now the problem is that line 1 does not get printed until line 4. What
> I thought would happen is that line 1 gets executed and the user sees
> that the statement that the test case is executing. Then after the
> test case executes a "PASS" or "FAIL" appears on the same line as the
> "-#- executing: 0053" statement.
> 
> e.g.
> -#- executing: 0053     FAIL
> 
> Some tests take a long time to finish thus the screen is blank until
> the entire test finishes and the above statement is outputted.
> 
> Thanks for any help.

'print' sends its output to sys.stdout, which is buffered, and may not be 
displayed immediately (because it's held in the buffer).  To force the output to 
be displayed, use flush():

   print "-#- executing: %s" % section,
   sys.stdout.flush()
   ...tests here...

Hope this helps!

--Hans


From fc14301589 at icqmail.com  Wed May 21 09:31:24 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 21 May 2008 21:31:24 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
Message-ID: <48342434_2@news.tm.net.my>

On 18:15, mercoled? 21 maggio 2008 alex23 wrote:

> On May 21, 7:52 pm, TheSaint <fc14301... at icqmail.com> wrote:

> There's also http://python.pastebin.com, which lets you create a new
> paste by modifying an existing one, and keeps them linked for easy
> diff'ing.
> 
> Sample: http://python.pastebin.com/d3964b241

Thank you for the reply :)
In my case, it's rather a set of modules which trying to remove spam from the
mailbox(es) either by POP3 or IMAP4 according regex criteria.
The project is working quiet good, the most advantage is that it downloads
only the header for speed needs. Some time I'm doing it by GPRS in roaming
and volume it _matters_ much.
I simply like that somebody will express some opinion about my job, as
meaning of teaching me better. After all that's what I'm trying to do ;)

Other idea, I'll apreciate somebody to join and put new views on this
project.





From nospam103 at jmiaz.com  Fri May 23 13:52:08 2008
From: nospam103 at jmiaz.com (Aaron Lance)
Date: Fri, 23 May 2008 10:52:08 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <ovDZj.89651$y05.58726@newsfe22.lga>

Troll much? 




From rdm at rcblue.com  Sun May 18 01:49:03 2008
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 May 2008 22:49:03 -0700
Subject: r' question
In-Reply-To: <op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <20080518023835.61FE61E4009@bag.python.org>
	<op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <20080518054915.9555B1E4007@bag.python.org>

At 10:17 PM 5/17/2008, Gabriel Genellina wrote:
>En Sat, 17 May 2008 23:37:16 -0300, Dick Moores <rdm at rcblue.com> escribi?:
>
> > I have a text file of phone numbers, which I'd like to search with a regex.
> >
> > fstr = "\sjoe\s"
> > regex = "^.*" + fstr + ".*$"
> >
> > fstr = "\sjoe\s"
> > regex = "r'^.*" + fstr + ".*$'"
>
>The r"..." is a signal to the parser - meaning 
>"don't interpret the escape characters here". 
>Note that the r is OUTSIDE the quotes. In your 
>example, the escape characters are in fstr, so 
>it should be written as r"\sjoe\s"

However, (please refer back to my original post) 
I want to keep the fstr, ultimately to be the 
string entered by the user who knows a bit about 
regex, but not how to use r'  ' . Or 
alternatively, not assume any knowledge of regex, 
but build in some options, such as ignoring/not 
ignoring case, searching on just a string, or on 
a word. So I want to know how to build the user's 
fstr into regex. I apologize for not making this clear.

>Now, if you want "the lines that contain the 
>word joe surrounded by space", just use:
>
>import re
>regex = r"\sjoe\s"
>p = re.compile(regex, re.I)
>f = open('phone.txt', 'r')
>for line in f:
>      m = p.search(line)
>      if m:
>          print m.group()
>f.close()
>
>A file is its own line iterator (no need for 
>readlines). And since you're iterating over 
>lines, the regex doesn't have to test for it ^ and $.

Yes, that works. Thanks.

Dick Moores 



From inhahe at gmail.com  Tue May 13 11:48:26 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 11:48:26 -0400
Subject: how to pass a python socket to a .dll?
Message-ID: <HJiWj.2720$Kk3.1386@bignews9.bellsouth.net>

i'm trying to make a .dll that will let me use WSAPoll, which is a windows 
sockets function, to mimic select.poll on a windows box.  i cbb learning 
python extensions, so i'm just going to use ctypes with a dll, so I hope 
that it doesn't bring up a big performance issue.   anyway, the problem is 
that I want to use Python-created sockets with it, but WSAPoll requires 
winsock2.h SOCKET objects.

so unless someone can tell me how to create/reference a windows socket 
object using the winsock2 lib from just a file/socket descriptor (being that 
this isn't a windows programming forum), i'm just asking how I could gain 
access to the actual Windows socket associated with a Python socket that 
Python for Windows has to store somewhere.  even if I have to modify 
socketmodule.c.

btw, i don't know much about this stuff, i hardly ever even program in c++, 
so i hope anybody's not too cryptic :P








From upton at virginia.edu  Thu May 29 18:53:29 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 18:53:29 -0400
Subject: question
In-Reply-To: <13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <5504f9ac0805291553n953f44o67a46886f796fc63@mail.gmail.com>

On Thu, May 29, 2008 at 6:41 PM, Gandalf <goldnery at gmail.com> wrote:
> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
>
> mmm isn't their any global variable for functions?

If I get what you're asking, you have to tell the function there
exists a global:

IDLE 1.2
>>> x=1
>>> def a():
	global x
	x+=1
	if x > 1:
		print x
	else:
		print "nope"

		
>>> print x
1
>>> a()
2
>>> print x
2


From artyprog at gmail.com  Sun May 18 14:41:25 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Sun, 18 May 2008 20:41:25 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <48307858$0$906$ba4acef3@news.orange.fr>

Try this

t = set("aaaaaaaaaaaabbbbbbbbbbccccccccc")
list(t)

Regards

Salvatore


"Matt Porter" <mabbikeel at gmail.com> a ?crit dans le message de news: 
mailman.1315.1211133997.12834.python-list at python.org...
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt
> -- 
> --
> 




From bignose+hates-spam at benfinney.id.au  Fri May  2 19:40:03 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 09:40:03 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<mailman.461.1209740889.12834.python-list@python.org>
Message-ID: <871w4kz358.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Sat, 03 May 2008 00:43:02 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Roy Smith <roy at panix.com> writes:
> > > Have you ever shipped software to a customer?
> > 
> > Yes, and all parties have been quite happy with the results.
> 
> When some of us talk about shipping software we aren't talking about
> a 20 line script delivered to our uncle's construction company
> office.

Nor was I. Thanks for the condescension and straw-man attacks, but...

> I do believe I am done with this thread.

That's a relief.

-- 
 \          ?He that would make his own liberty secure must guard even |
  `\                         his enemy from oppression.? ?Thomas Paine |
_o__)                                                                  |
Ben Finney


From dteslenko at gmail.com  Wed May 14 03:04:19 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Wed, 14 May 2008 11:04:19 +0400
Subject: file locked for writing
In-Reply-To: <op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
	<op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>

On Wed, May 14, 2008 at 8:18 AM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 13 May 2008 11:57:03 -0300, Dmitry Teslenko <dteslenko at gmail.com>
>  Is the code above contained in a function? So all references are released
> upon function exit?

Yes, it's a function

>  If not, you could try using: del input, output, filter
>  That should release all remaining references to the output file, I presume.
> Or locate the inner reference to the output file (filter.something perhaps?)
> and explicitely close it.

That doesn't help either.
When I've rewrite code something like that:

       with open(backup_file_name, 'w') as backup_file:
               .....
               filter.parse('<updated file name>')
	       del input, output, filter
	os.remove(project.get_vcproj())
	os.rename(backup_file_name, project.get_vcproj())

It triggers WindowsError on os.remove()


From miller.paul.w at gmail.com  Sun May 25 22:46:14 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:46:14 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com>

On May 25, 3:51?pm, pball.benet... at gmail.com wrote:
> dear pythonistas,
>
> I think this problem is related to integer partitioning, but it's not
> quite the same. The range of answers has a little combinatorial
> explosion problem as S gains new members. In my problem, len(S) is
> usually on the order of 1M, and in the worst case, 10M, and there are
> on the order of 10k elements.

If, by "integer partitioning," you mean the "subset sum
problem" (given a finite set S of integers, does S contain a subset
which sums up to some given integer k?), then you are right.  I'm
reasonably sure there's a polynomial reduction from your problem to
the subset sum problem.  That would make your problem NP-complete.

As for algorithms, I don't think there's an exact algorithm any better
than trying all the possibilities and stopping when one comes close.
Say, for example, we specify the problem to be: given sets s_0, s_1,
s_2, ..., s_n, with S defined to be the union of all the s_i's, return
all functions f which, using the sets s_1, s_2, ..., s_n and the
elementary set operations (union, intersection, difference), returns
the set s_0.

Now, you need to be a little more careful, because, given a function f
which satisfies the problem, I can always define f' = f(S) + s_1 - s_1
and get another function which satisfies the definition.

Like I said, because this looks related to the subset sum problem
(though harder, because you're asking for "all" such functions, for
some rigorous definition of "all," as per the previous sentence), I
suspect it's NP-complete.  However, there are probably some good
heuristics, such as if s1 has a large intersection with s0, it's
probably a good idea to use s1 in whatever formula you come up with.

Other than that, I don't really have an idea.  Can you say what the
application of this algorithm would be?  Knowing the use case might
suggest a better approach.


From cnshoes76 at yahoo.com.cn  Sat May 10 04:11:16 2008
From: cnshoes76 at yahoo.com.cn (cnshoes76 at yahoo.com.cn)
Date: Sat, 10 May 2008 01:11:16 -0700 (PDT)
Subject: CHINA WHOLESALE MEN 'S PRADA GUCCI SANDALS
Message-ID: <da3c2a5d-a999-4b10-ac20-3acd5f299bfa@q24g2000prf.googlegroups.com>

European and South America market. All the products are in high
quality with reasonable price. Most of the items listed in our
website ,we have got them in stocks, if there isn't ,please let us
know your specific requirements.



From geoldr at gmail.com  Thu May 22 11:59:40 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 08:59:40 -0700 (PDT)
Subject: Restarting a program
Message-ID: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>

Hello all, I have written a simple program, and at the end of it,
instead of it closing I would like it to restart from the beggining.
Is there a way to do this? Put my code into a class function, or
something?
I guess I could do a while loop, but I think if there is a way to run
my code if it's in a class would be an easier option. I can't seem to
find many guides online but maybe I have not been looking in the right
places.

Anybody have any ideas?


From saluk64007 at gmail.com  Fri May  2 13:36:58 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Fri, 2 May 2008 10:36:58 -0700
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
	<8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
Message-ID: <c3f69bf60805021036t455445a6i89f3e20644b5a751@mail.gmail.com>

The K_a is a constant integer, but you don't need to worry about it's
value.  It tells you the index in get_pressed() to check for.  So:

print pygame.key.get_pressed()[pygame.K_a]

Says, look at the 97th index in the get_pressed() list and see if that is a
1 or a 0.

Or if you use the pygame events:

for evt in pygame.event.get():
    if evt.type == pygame.KEYDOWN and evt.key == pygame.K_a:
        print "a pressed"

evt.type and evt.key will both be integers that map to one of the type
constants and one of the key constants respectively.  This way the key
constant works in both types of input handling (which are both useful for
different types of input).
-------------- next part --------------
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From mal at egenix.com  Thu May  1 06:03:33 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 01 May 2008 12:03:33 +0200
Subject: Python -v import behavior
In-Reply-To: <357b87b40804300942v371152b0u9dcc6d8b8d0a3b32@mail.gmail.com>
References: <357b87b40804300942v371152b0u9dcc6d8b8d0a3b32@mail.gmail.com>
Message-ID: <48199575.9020608@egenix.com>

On 2008-04-30 18:42, Sean Ryan wrote:
> Hi all,
> (A similar question was posted by a colleague, but did not appear to  reach
> comp.lang.python or this list).
> 
> I am wondering if the -v option causes the python application to be more
> tolerant to module import warnings and / or errors.
> 
> The reason is that a module is failing to import correctly (generating an
> ImportError exception).  Examining this closer we re-ran the script using
> the -v option. to find that "Unsatisfied symbol" errors we being displayed
> during import (cx_Oracle 4.3.1, python 2.5.1, HP-UX 11, oracle 9.2).
> However, the module is usable from the python prompt (when using -v)
> displayed, i.e. dir (cx_Oracle) works correctly, as does  database
> interaction.  Without the -v option the script is halted due to the
> ImportError exception.
> 
> My questions are:
> 1.  Is there a way to mimic the seemingly more tolerant import behavior  of
> python -v without producing the verbose output ?
> 2.  Is the behavior described above expected and documented ?

The -v option only causes Python to print more information to
stderr explaining where it is looking for modules.

You should be seeing any dynamic loader messages in both cases,
ie. when running with or without -v.

While it is possible that cx_Oracle does some extra processing
when running Python in -v mode, this is rather unlikely.

Note that the best way to track down "unsatified symbol" errors
is to inspect the dependencies of the modules and other shared
libs involved.

Running an strace (or similar system trace utility) will also
help to identify the problem, since this lists the shared libs
the process tries to load when starting up and also during
import of Python modules.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 01 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From kyosohma at gmail.com  Sat May 10 14:43:06 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 10 May 2008 11:43:06 -0700 (PDT)
Subject: Is there a PyPI API?
Message-ID: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>

Hi,

I am experimenting on creating a GUI wrapper for easy_install and I
would like to be able to allow the user the browse PyPI topically.
However, I am having some trouble figuring out how to get the
information in a topical manner.

I can get the list of classifiers easily using urllib2 like so:

def getPyPiClassifiers():
    print 'Get list of Topics from PyPI...'

    url = 'http://pypi.python.org/pypi?%3Aaction=list_classifiers'
    res = urllib2.urlopen(url)
    page = res.read()

And there's a "light-weight" list of all the packages on PyPI here:
http://pypi.python.org/simple/

I just can't figure out how to get the metadata, I guess. I found Paul
Boddies SGMLParser example (http://www.boddie.org.uk/python/HTML.html)
which can get me some URLs, but what I really need is some kind of
dict of tuples or lists like this:

{'Framework':(('Buildout', 'bazaarrecipe', 'Buildout recipe for
Bazaar'),
                   ('Buildout', 'buildout_script', 'zc.buildout
recipes for generating script and conf files from templates.')
)}

Any ideas on how best to approach this would be great. I'm still
learning HTML/XML parsing techniques and am having trouble wrapping my
mind around it.

Thanks!

Mike


From efurman at admailinc.com  Thu May 22 13:13:57 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 22 May 2008 09:13:57 -0800
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <4835A9D5.9060607@admailinc.com>

John Machin wrote:

> Robert Kern wrote:
>
>> Ethan Furman wrote:
>>
>>> Greetings,
>>>
>>> I'm looking at the struct module for binary packing of ints and 
>>> floats.  The documentation refers to C datatypes.  It's been many 
>>> years since I looked at C, but I seem to remember that the data type 
>>> sizes were not fixed -- for example, an int might be two byes on one 
>>> machine, and four bytes on the next.  Can any C programmers verify 
>>> this?  If it is true, does that mean that struct.pack('h', 8001) 
>>> might give me different results depending on the machine it's 
>>> running on?
>>
>>
>> Right. I believe (but could be wrong) that "char" is defined to be 
>> one byte, but that "short", "int", "long", and "long long" are 
>> defined as "at least as big as the previous type".
>>
>> In practice, though, on nearly every machine that Python runs on, 
>> "char" is one byte, "short" is two bytes, and "int" is four bytes. 
>> "longs" and "long longs" tend to vary substantially, though; never 
>> assume sizes for them.
>>
>> Single-precision floats are always four bytes and double-precision 
>> floats are always eight bytes. "long doubles" vary; they could be 
>> twelve bytes or sixteen.
>>
>> If you want to deal with fixed sizes, use struct.calcsize() to test 
>> the sizes of each of the integer types, assign them to width-specific 
>> aliases, and always use these aliases.
>>
>
> This is all true if you want to operate in "native" mode; however in 
> "standard" mode the sizes are fixed -- otherwise there'd be no easy 
> way of reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof 
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required 
> for any type (so you have to use pad bytes); short is 2 bytes; int and 
> long are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and 
> double are 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a 
> long-established PC file format, he will need to '<' for littleendian 
> order, and an appropriate selection from bBhHiI and d will do what he 
> needs.
>
> HTH,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Next question:  when using struct.pack to store an integer, I get a 
deprecation warning if the int is too big... I would rather have an 
error.  Is there a setting somewhere that controls this?

 >>> struct.pack('<i', 4294967295)
c:\python25\interact.py:1: DeprecationWarning: struct integer overflow 
masking is deprecated
'\xff\xff\xff\xff'



From fc14301589 at icqmail.com  Wed May 21 05:52:56 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 21 May 2008 17:52:56 +0800
Subject: Publish a program
Message-ID: <4833f0ff_2@news.tm.net.my>

Hello,

I'm not a master of python :) If I would publish my program for reviewing,
where should I upload it?




From ethan.mallove at sun.com  Tue May 20 15:15:28 2008
From: ethan.mallove at sun.com (emallove)
Date: Tue, 20 May 2008 12:15:28 -0700 (PDT)
Subject: Python in non-standard location erring with "No module named 
	_sha256"
References: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>
Message-ID: <3bcbc67a-2293-4a38-b335-43d8791232d6@z24g2000prf.googlegroups.com>

On May 20, 11:27?am, emallove <ethan.mall... at sun.com> wrote:
> I'm running into the below "No modules named _sha256" issue, with a
> python installed in a non-standard location.
>
> $ python
> Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
> [GCC 3.3.3 (SuSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> import md5
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
> ? ? from hashlib import md5
> ? File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
> <module>
> ? ? sha224 = __get_builtin_constructor('sha224')
> ? File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
> __get_builtin_constructor
> ? ? import _sha256
> ImportError: No module named _sha256
>
> Googling around, this seems to be related to OpenSSL being in a non-
> standard location? I've edited the Setup file to set $(SSL) to the non-
> standard location. Now Python compiles fine, but I still get the above
> error.
>
> Any help would be much appreciated.
>
> Thanks,
> Ethan

One solution was to just use Python 2.3.7 (instead of 2.5).

-Ethan


From aguirre.adolfo at gmail.com  Tue May  6 17:58:18 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Tue, 6 May 2008 14:58:18 -0700 (PDT)
Subject: DISLIN Manual
Message-ID: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>

I am at the very beginning of the DISLIN 9.3 Manual:   1.4 Quickplots

Some quickplots are added to the DISLIN module which are collections
of DISLIN routines for displaying data with one command. For example,
the function ?plot? displays two-dimensional curves. Example:
from Numeric import *
from dislin import *
x = arange (100, typecode=Float32)
plot (x, sin (x/5))
disfin ()

Problems:

1. "from Numeric import * "  statement produced an error message, I
had to replace it with "from numpy import *"

2. The "from dislin import *" statement produced an error message:
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    from dislin import *
ImportError: No module named dislin

I checked the environmental variables paths and they are according to
instructions. What else to do?

Any help will be much appreciated

Adolfo


From gagsl-py2 at yahoo.com.ar  Mon May 26 01:37:45 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 02:37:45 -0300
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
Message-ID: <op.ubqxw7yox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 02:06:02 -0300, Prisoner at War <prisoner_at_war at yahoo.com> escribi?:

> Might you have any idea, BTW, whether the upcoming "Head First
> Programming" from O'Reilly, coming in August, will cover Python 3??
> Unlikely, right?  Unless maybe if that guy Vern Ceder (the author) is
> active in the Python development community??
>
> I'd already pre-ordered the book...but it makes no sense to get a book
> on "old" Python 2.x if it's just going to get deprecated in like a
> year or two!  Then again, current Python programs would still work,
> right?  I mean, once it's been done up as an executable...PySol or
> something should still work, right?  (Sorry, iman00b, I don't really
> know how this stuff works....)

The differences aren't so fundamental or important: it's not an entirely new language, just some ugly old things are being removed or changed in incompatible ways (at *some* time it was supposed to happen - but could not happen on the 2.x series which has to remain backwards compatible)
Also, Python 3.0 will be released simultaneously with 2.6, and there will be other 2.x releases. Python 2 won't magically disappear from Earth, I don't think Linux distros will come with Python 3.0 by default anytime soon (perhaps not before 3.1).
So learning Python with a book targeted to 2.5 isn't a waste of time - not at all.
(This subject has already been discussed several times in this group.)

-- 
Gabriel Genellina



From kw at codebykevin.com  Sun May 25 10:42:06 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 25 May 2008 10:42:06 -0400
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <48397ABE.2070006@codebykevin.com>

Sanoski wrote:
> This might be a dumb question. I don't know. I'm new to all this. How
> do you find icons for your programs? All GUI applications have cool
> icons that represent various things. For instance, to save is often
> represented as a disk, etc. You know, the small little picture
> references that give meaning to the phrase 'Graphical User Interface'.
> But I'm not a graphics artist! Drawing is simply one talent that
> skipped me completely. Where can I find icons to use with my programs?
> 
> I don't even know how to search for them, because I'm not sure how to
> word it. I tried Googling various things: icons, software graphics,
> application icons, custom graphics, etc, etc. But I'm not getting much
> luck here you guys.
> 
> Also, besides just finding a collection of various pre-made icons, who
> would I talk to to make me some original custom made icons? I'll look
> for hours and find one or two places, but they never respond to my
> messages, so I figure they must not do that kind of art work.
> 
> I'm looking for both: a collection of graphics and some place (or
> someone) that can make custom original graphics. The latter is just
> for future reference. The more important one is the former, because I
> can't even afford to pay for originals right now. But maybe I will
> soon, so it would be nice to have a resource.
> 
> Thanks in advance,
> Joshua

http://tango.freedesktop.org/Tango_Desktop_Project
http://www.oxygen-icons.org/
http://everaldo.com/crystal/

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From d3vvnull at gmail.com  Sat May  3 12:34:39 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Sat, 3 May 2008 11:34:39 -0500
Subject: Why is None <= 0
In-Reply-To: <4d86a7ce-8f3f-493b-b1c2-a2659817b215@k13g2000hse.googlegroups.com>
References: <fut7q3$kup$1@newsreader2.utanet.at>
	<481226f9$0$20866$9b622d9e@news.freenet.de>
	<Xns9A8F6B26096EFduncanbooth@127.0.0.1>
	<4d86a7ce-8f3f-493b-b1c2-a2659817b215@k13g2000hse.googlegroups.com>
Message-ID: <170543c70805030934x2d1c23es90c424c0592590f4@mail.gmail.com>

New style classes are classes inherited from class object.  Therefore:
class A:
    pass

is oldstyle, while

class B(object):
    pass

is newstyle.

On Tue, Apr 29, 2008 at 8:29 AM, blaine <frikker at gmail.com> wrote:

> On Apr 29, 5:32 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> > =?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?= <mar... at v.loewis.de> wrote:
> > > (FWIW, in 2.x, x>=4?, it's None < numbers < anything else;
> > > numbers are ordered by value, everything else is ordered
> > > by type name, then by address, unless comparison functions
> > > are implemented).
> >
> > Quite apart from Jon pointing out that this isn't true for all cases
> when
> > copmparing against None, the other half also isn't true:
> >
> > >>> class C: pass
> > >>> C() < 5
> >
> > True
> >
> > That happens at least in Python 2.5.2 on win32. Yet another reason to
> avoid
> > old-style classes.
>
> Sorry - but what are new style classes?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From castironpi at gmail.com  Wed May 14 19:21:50 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:21:50 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>
Message-ID: <d100fada-097c-49cb-8eb8-c56344245ea5@24g2000hsh.googlegroups.com>

On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> >?Should tuples be named?
>
> Yes.

Good; they're named sequences.


From arnodel at googlemail.com  Wed May  7 16:12:18 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 21:12:18 +0100
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <m2bq3h6fh9.fsf@googlemail.com>

"M?ta-MCI (MVP)" <enleverlesX.XmcX at XmclaveauX.com> writes:

> Hi!
>
>> I don't often feel like using this word
>
> Look at languages like OCAML or F #

While I like Objective Caml, it is definitively not Python!

-- 
Arnaud



From rhamph at gmail.com  Mon May 12 04:40:01 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 12 May 2008 01:40:01 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
Message-ID: <339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com>

On May 11, 10:16 am, skunkwerk <skunkw... at gmail.com> wrote:
> On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
> > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > declaimed the following in comp.lang.python:
>
> >         Coming in late...
>
> > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > >skunkwerkwrote:
> > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > new requests are inserted, like so:
>
> >         <snip>
>
> > > > > queue = Queue.Queue(0)
> > > > >  WORKERS=100
> > > > > for i in range(WORKERS):
> > > > >    thread = SDBThread(queue)
> > > > >    thread.setDaemon(True)
> > > > >    thread.start()
>
> > > > > the thread:
>
> > > > > class SimpleDBThread ( threading.Thread ):
> > > > >    def __init__ ( self, queue ):
> > > > >            self.__queue = queue
>
> >         Note: double-leading __ means "name mangling" -- typically only
> > needed when doing multiple layers of inheritance where different parents
> > have similar named items that need to be kept independent; a single _ is
> > the convention for "don't touch me unless you know what you are doing"
>
> > > > >            threading.Thread.__init__ ( self )
> > > > >    def run ( self ):
> > > > >            while 1:
> > > > >                    item = self.__queue.get()
> > > > >                    if item!=None:
> > > > >                            model = domain.get_item(item[0])
> > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > >                            title = model['title']
> > > > >                            scraped = model['scraped']
> > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > any suggestions?
> > > > > thanks
>
> >         <snip>
>
> > > thanks John, Gabriel,
> > >   here's the 'put' side of the requests:
>
> > > def prepSDBSearch(results):
> > >    modelList = [0]
> > >    counter=1
> > >    for result in results:
> > >            data = [result.item, counter, modelList]
> > >            queue.put(data)
> > >            counter+=1
> > >    while modelList[0] < len(results):
> > >            print 'waiting...'#wait for them to come home
> > >    modelList.pop(0)#now remove '0'
> > >    return modelList
>
> >         My suggestion, if you really want diagnostic help -- follow the
> > common recommendation of posting the minimal /runable (if erroneous)/
> > code... If "domain.get_item()" is some sort of RDBM access, you might
> > fake it using a pre-loaded dictionary -- anything that allows it to
> > return something when given the key value.
>
> > > responses to your follow ups:
> > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > list in the above function.  it's not global, and the initial values
> > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > passes in the same memory address or declares a new 'data' list (which
> > > I guess is what I want)
>
> >         Rather confusing usage... In your "put" you have a list whose first
> > element is "result.item", but then in the work thread, you refer to the
> > entire list as "item"
>
> > > 3)  the first item in the modelList is a counter that keeps track of
> > > the number ofthreadsfor this call that have completed - is there any
> > > better way of doing this?
>
> >         Where? None of your posted code shows either "counter" or modelList
> > being used by thethreads.
>
> >         And yes, if you havethreadstrying to update a shared mutable, you
> > have a race condition.
>
> >         You also have a problem if you are using "counter" to define where
> > in modelList a thread is supposed to store its results -- as you can not
> > access an element that doesn't already exist...
>
> > a = [0]
> > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> >         Now, if position is irrelevant, and a thread just appends its
> > results to modelList, then you don't need some counter, all you need is
> > to check the length of modelList against the count expected.
>
> >         Overall -- even though you are passing things via the queue, the
> > contents being pass via the queue are being treated as if they were
> > global entities (you could make modelList a global, remove it from the
> > queue entries, and have the same net access)...
>
> >         IOWs, you have too much coupling between thethreadsand the feed
> > routine...
>
> >         As for me... I'd be using a second queue for return values...
>
> > WORKERTHREADS = 100
> > feed = Queue.Queue()
> > result = Queue.Queue()
>
> > def worker():
> >         while True:
> >                 (ID, item) = feed.get()                 #I leave the queues globals
> >                                                                                 #since they perform locking
> >                                                                                 #internally
> >                 model = domain.get_item(item)
> >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > for i in range(WORKERTHREADS):
> >         aThread = threading.Thread(target=worker)
> >                 #overkill to subclass as there is now no specialized init
> >                 #and if I really wanted to make the queues non-global
> >                 #I'd pass them as arguments:
> >                 #       threading.Thread(target=worker, args=(feed, results))
> >                 #where worker is now
> >                 #       def worker(feed, results):
> >         aThread.setDaemon(True)
> >         aThread.start()
>
> > ...
>
> > def prepSearch(searches):
> >         modelList = []
> >         counter = 0
> >         for searchItem in searches:
> >                 feed.put( (counter, searchItem) )
> >                 counter += 1
> >                 modelList.append(None)  #extend list one element per search
> >         while counter:
> >                 (ID, title, scraped) = results.get()
> >                 modelList[ID] = (title, scraped)
> >                 counter -= 1
> >         return modelList
>
> >         The only place counter and modelList are modified are within the
> > prepSearch. I'm passing counter out and back to use as an ID value if
> > the final results are supposed to be in order -- that way if one thread
> > finishes before another, the items can be placed into the list where
> > they'd have been sequentially.
>
> >         I can only hope that "domain.get_item" is an activity that is I/O
> > bound AND that it supports parallel accesses... Otherwise the above
> > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > threading swaps for what is otherwise a rather linear process.
>
> >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > mainthreadsthat are posting to the worker feed queue (and you were
> > using separate mutables for storing the results). In this situation, I'd
> > remove the results queue from being a global entity, create one queue
> > per main processing thread, and pass the queue as one of the parameters.
> > This way, a worker can return data to any source thread by using the
> > supplied queue for the return...
>
> > Modify prepSearch with:
>
> >         myQueue = Queue.Queue()
> > ...
> >         feed.put( (counter, searchItem, myQueue) )
> > ...
> >         (ID, title, scraped) = myQueue.get()
>
> > Modify worker with:
>
> >         (ID, item, retqueue) = feed.get()
> > ...
> >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> wow.  thanks for the help.
>    i seem to have fixed my problem though - it turns out
> domain.get_item was not thread safe as it was using the underlying
> httplib.  the solution was to create a new connection to the database
> for each thread (which is ok as the database is meant to be queried in
> a massively paralell fashion).  the missing part of the code included
> a part where i inserted the results at the given position into the
> list.
>
> the only issue i have now is that it takes a long time for 100 threads
> to initialize that connection (>5 minutes) - and as i'm doing this on
> a webserver any time i update the code i have to restart all those
> threads, which i'm doing right now in a for loop.  is there any way I
> can keep the thread stuff separate from the rest of the code for this
> file, yet allow access?  It wouldn't help having a .pyc or using
> psycho, correct, as the time is being spent in the runtime?  something
> along the lines of 'start a new thread every minute until you get to a
> 100' without blocking the execution of the rest of the code in that
> file?  or maybe any time i need to do a search, start a new thread if
> the #threads is <100?

$ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
t.start(); t.join()'
10000 loops, best of 3: 131 usec per loop

Clearly it is not the threads themselves, but something else which is
expensive.

It's not clear why you need threads at all.  Unless you've got a lot
of cpus/cores running that DBMS, or it's got fairly high latency (and
no way to pipeline), attacking it with more threads isn't gonna give
significant speedups.


From goodprada at 126.com  Sat May 10 19:46:51 2008
From: goodprada at 126.com (128)
Date: Sat, 10 May 2008 16:46:51 -0700 (PDT)
Subject: paypal wholesale, NBA,adidas     (  paypal accept     )     (   
	www.honest-shop.cn      )
Message-ID: <adce9449-797d-4946-aacc-5b1f1c681e73@w4g2000prd.googlegroups.com>

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From dteslenko at gmail.com  Tue May 13 10:57:03 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Tue, 13 May 2008 18:57:03 +0400
Subject: file locked for writing
Message-ID: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>

Hello!
I use some script in python 2.5 from vim editor (it has python
bindings) that updates some file
and then launches another program (ms visual studio, for example) to
do something with updated file.
I faced problem when updated file is locked for writing until vim
editor is closed.

launch vim -> update file -> launch msvc -> file locked
launch vim -> update file -> launch msvc -> close vim -> file locked
launch vim -> update file -> -> close vim -> launch msvc -> file okay

Update code is something like that:

	backup_file_name = '<some file name>'
	with open(backup_file_name, 'w') as backup_file:
		input = sax.make_parser()
		output = saxutils.XMLGenerator(backup_file, 'cp1252')
		filter = __vcproj_config_filter('<updated file name>', input, output)
		filter.parse('<updated file name>')
	shutil.copyfile(backup_file_name, '<updated file name>')
	os.remove(backup_file_name)

__vcproj_config_filter is a descent of a XMLFilterBase; it substitutes
some attributes in xml file and that's all.
must be noted that __vcproj_config_filter instance holds reference to
output (sax xml parser) object.


From inhahe at gmail.com  Wed May 21 01:58:23 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 01:58:23 -0400
Subject: Removing Space and "-" from a string
References: <mailman.1387.1211301238.12834.python-list@python.org>
Message-ID: <zROYj.13071$Xv3.2883@bignews4.bellsouth.net>


<python at bdurham.com> wrote in message 
news:mailman.1387.1211301238.12834.python-list at python.org...
> Shakir,
>
>> I have thousands of records in MS Access database table, which records I
>> am fetching using python script. One of the columns having string like
>> '8 58-2155-58'
>>
>> Desired output: '858215558'
>>
>> I want to remove any spaces between string and any dashes between
>> strings. I could do it in access manually but want to do from python
>> script
>
> Try this:
>
>>>> input = '8 58-2155-58'
>>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>>> output
> '858215558'
>
> Malcolm

how about

output = ''.join(input.replace('-',' ').split())
or
output = input.replace('-','').replace(' ','')




From grante at visi.com  Wed May 14 09:51:31 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 14 May 2008 08:51:31 -0500
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
	<go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
Message-ID: <T-mdnWQVhZf-c7fVnZ2dnUVZ_hninZ2d@posted.visi>

On 2008-05-14, Tim Roberts <timr at probo.com> wrote:
> globalrev <skanemupp at yahoo.se> wrote:
>
>>and when the program gets killed because out of memory all this
>>will be deleted from the memory?
>
> Yes.  When a process is killed, all of the memory it was using
> is released.
>
>>so there is no way that you can, by accident, fill your whole
>>harddrive and make it unusable?
>
> Of course not.  Where do you see a connection between memory
> and your hard drive?
>
> Now, you can certainly fill your hard drive by running your
> little infinite loop application and storing the results in a
> file:

Again, that's only a problem if the OS lets it be problem.  No
real OS will let a drive become unusable because of a runaway
user program.  Any decent filesystem can provide per-user disk
quotas and a "reserve" of space for system/root use.

-- 
Grant Edwards                   grante             Yow! I just had a NOSE
                                  at               JOB!!
                               visi.com            


From jcd at unc.edu  Mon May  5 08:51:25 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Mon, 05 May 2008 08:51:25 -0400
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <1209991885.3300.2.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 04:57 -0700, globalrev wrote:
> class Foo(object):
> 	def Hello(self):
> 		print "hi"
> 
> object is purple, ie some sort of reserved word.
> 
> why is self in black(ie a normal word) when it has special powers.
> replacing it with sel for example will cause an error when calling
> Hello.
> 

Wow.  No it won't.  sel is perfectly legal.  I've seen s used on
occasion, and of course metaclass methods often use cls.

Direct ^C^V from my python interpreter:

$ python
Python 2.4.3 (#1, Dec 11 2006, 11:38:52) 
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class Foo(object):
...     def Hello(sel):
...             print "hi"
... 
>>> f = Foo()
>>> f.Hello()
hi
>>> 

Can you paste an example that breaks for you?


-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From sebey at mac.com  Thu May 29 10:26:18 2008
From: sebey at mac.com (sebey)
Date: Thu, 29 May 2008 07:26:18 -0700 (PDT)
Subject: feedparser html sanitizion how-to disable it
References: <c7a6a23f-9fcf-4add-9e2e-9202f2895932@25g2000hsx.googlegroups.com>
Message-ID: <ee5fc6e3-7e34-4938-95d3-6d9d673457c7@2g2000hsn.googlegroups.com>

oh sorry here is the rss feed I am using

http://recordings.talkshoe.com/rss39293.xml



From parimala.kalavala at gmail.com  Tue May 20 00:18:29 2008
From: parimala.kalavala at gmail.com (PARIMALA KALAVALA)
Date: Tue, 20 May 2008 09:48:29 +0530
Subject: regarding process preemption in linux
Message-ID: <67eb1c790805192118l646fd5c4l681b196ade76b5d2@mail.gmail.com>

Hello,

     I am presently working on linux.
I wanted to know how to view the preemption of one process by another
process. If we give TOP command we are not able to visualize it or do we
need to write any different code to see it or is it possible to see it in
the proc file system.

Any help would be appreciated.

Thanks

Parimala
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From nevillednz at gmail.com  Sat May  3 21:38:46 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Sat, 3 May 2008 18:38:46 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com> 
	<4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com> 
	<mailman.493.1209790152.12834.python-list@python.org>
Message-ID: <ce5621d9-3355-47bd-b338-03b0068035f7@u12g2000prd.googlegroups.com>

To check a complete python expression use:

def check_open_close(expr):
  try:
    eval(expr)
  except SyntaxError:
    return False
  else:
    return True

This also ignores brackets in quotes, and checks <= & >= operators are
syntatically correct etc...
But is may have side effects... ;-)
eg.
 check_open_close('__import__("os").system("echo rm -rf /") # OK')

c.f http://en.wikipedia.org/wiki/Scope_creep

N


From python at hope.cz  Thu May 15 11:38:38 2008
From: python at hope.cz (Johny)
Date: Thu, 15 May 2008 08:38:38 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<482c54f2$1@news.mel.dft.com.au>
Message-ID: <3e9fcb51-abe6-4a6a-bd1a-9adb5bd155c4@y21g2000hsf.googlegroups.com>

On May 15, 5:21?pm, John Machin <sjmac... at lexicon.net> wrote:
> Johny wrote:
> > Is there a module for reading/modifing db files from Python?
> > Thanks for help
> > B.
>
> I have a module -- which I'm going to get around to releasing one of
> these days :-) -- which allows to read dBase III, dBase IV and Foxpro
> files (sequentially only, not randomly) and to write dBaseIII files
> sequentially. Index files if any are ignored.
>
> Field types supported for reading:
> C character
> D date
> F float
> I integer (32 bits)
> L logical
> M memo (stored in a .DBT (dBase) or .FPT (FoxPro) file)
> N number
> T time
>
> Writing supports only dBaseIII with C, D, L and N fields, but could be
> extended easily enough (I've never had the need). No index files are
> written.
>
> E-mail me if you are interested.
>
> Cheers,
> John

Hello John,
Yes, I am interested. Is it possible to download the module?
Thanks
Lad


From goldnery at gmail.com  Fri May 30 08:57:03 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 05:57:03 -0700 (PDT)
Subject: Generating event from event
Message-ID: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>

I have script which being triggered by pressing CTRL+Right mouse click
from any place in my O.P , Now I need to generate automatically event
like copy my selected item or double clicking the right mouse cursor
without user interfering.
how can i implement this width python?


thanks!


From sn at sncs.se  Tue May 27 11:21:13 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:21:13 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
Message-ID: <a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>

I was talking about Guido van Rossum

The one who decides, so far when people agree

But we can make a new fork

He is the originator, but now it seems, for me, it is hanging out in
the air

So we need some new leadership

>From somebody, somebody like you perhaps. Or me.

Sverker


On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > seems to be needed
>
> > He doesn't seem to care much anyway now
>
> > Or if he cares, he have many other assignments
>
> Who are you talking about?
>
>
>
> > So should we try to elect a new chairman?
>
> Chairman? Elaborate please.
>
>
>
> > I am probably not eligible. There must be many others.!
>
> > Do you dare?consper
>
> Hm, are you and castrionpi twin brothers or something?
>
> > S.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.



From goldnery at gmail.com  Sat May 24 09:53:24 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 24 May 2008 06:53:24 -0700 (PDT)
Subject: About events
Message-ID: <97a6bea0-69a4-424f-b512-26ff80cecdb8@x41g2000hsb.googlegroups.com>

As i said before I work with the WX library on a windows XP operation
system.

Now i wont to create an application which ran at the background and
wait till the user  double click on a text word  OF any other python
or none python application which ran on the desktop, and when this
event append i wont my application to pup up a translation of this
word.

I figured that I need to understand  how can i select text
automaticlly and copy it to the clipbord for doing that

if someone know how to do it, or know whether  this WX library capable
of doing it (and if not which library can...) i would be very
thankful

Have a nice day


From gherron at islandtraining.com  Sat May  3 11:11:12 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 03 May 2008 08:11:12 -0700
Subject: How to use a parameter in a class
In-Reply-To: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <481C8090.6030905@islandtraining.com>

Decebal wrote:
> I have the following class:
> #####
> class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
>
>     def testing(self):
>         print 'In test: %d' % self.value
>
>     def returnValue(self):
>         return self.value
>
>     result = someFuntion(default = value)
>   

But of course it doesn't work, as it tries to call someFunction and no 
such thing is define anywhere. 

But that can't be the answer to the *real* question you are trying to 
ask.  Why don't you tell us what you are trying to do here, and we'll 
wee if we can help.

Gary Herron


P.S.  Having a class attribute AND an instance attribute, both named 
"value" is going to cause trouble.

>
>
> #####
>
> But the last line does not work.
> I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
>
> And that someFunction gets a default value of 12. How can I do that?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From mal at egenix.com  Thu May  8 12:13:01 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 08 May 2008 18:13:01 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
Message-ID: <4823268D.1060602@egenix.com>

On 2008-05-08 16:16, Florencio Cano wrote:
> Hi,
> I would be interested in your opinion about what technology you
> considear the ideal technology for implementing in Python an agent
> that should comunicate information to a web server. I have read about
> SOAP but I'm now sure if this will be the right one.
> The aim of the agent is gather inventory information and the web
> application (I'm programming it in Django) will receive this
> information and will store it in the database and will show it in
> tables.

The choice of protocol depends a lot on what you want to transfer.

SOAP would be a good choice if you want to send to data to other
servers as well, e.g. Java-based ones.

XML-RPC and JSON are better for simple data structures.

If you have control over both client and server and don't
need to bother with other backends or frontends, Python
pickle is the best choice.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 08 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From timr at probo.com  Thu May 22 00:52:16 2008
From: timr at probo.com (Tim Roberts)
Date: Thu, 22 May 2008 04:52:16 GMT
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
	<94ce5e02-0185-4513-9bc1-7ec483be57aa@y21g2000hsf.googlegroups.com>
Message-ID: <imu9341dhljm72kuo4rgq39udtuib86340@4ax.com>

"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> wrote:
>On May 20, 12:14 am, Tim Roberts <t... at probo.com> wrote:
>> Monica Leko <monica.l... at gmail.com> wrote:
>>
>> >I have a specific format and I need binary representation.  Does
>> >Python have some built-in function which will, for instance, represent
>> >number 15 in exactly 10 bits?
>>
>> For the record, I'd like to point out that even C cannot do this.  You need
>> to use shifting and masking to produce a stream of 8-bit bytes, or to
>> extract your values from a stream of 8-bit bytes.
>
>Technically specifying 8-bits isn't quite accurate, as C allows for 9-
>bit bytes and other variations depending on the architecture.  But
>that may be overly pedantic unless you have a PDP-10 laying around
>that you're writing C code on or something like that.

As long as we are being pedantic, and I don't mind that, I would point out
that I didn't actually say that C worked in 8-bit bytes.  I was very
careful to say merely that, assuming you wanted a stream of 8-bit bytes,
you need to use shifting and masking to produce it.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From __peter__ at web.de  Thu May 29 09:33:25 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 15:33:25 +0200
Subject: Reporting the line number of an exception
References: <229d7d86-c652-4282-aaa9-4274cd0d63fd@a1g2000hsb.googlegroups.com>
Message-ID: <g1mbb2$ono$02$1@news.t-online.com>

sophie_newbie wrote:

> I'm sure this is exceedingly simple but I can't find it anywhere. When
> I catch an exception I would like to report the line number of the
> exception as well as the error info.
> 
> try:
>     someError()
> except Exception, e:
>     "print_error_and_line_number"
> 
> How do I find the line number?

If you want just the line number:

tb = sys.exc_info()[2]
print tb.tb_lineno

You may also have a look at the traceback module, e. g.:

traceback.print_exc()

Peter


From musiccomposition at gmail.com  Sun May 25 23:05:13 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Sun, 25 May 2008 20:05:13 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <dad8a839-1311-4aa4-af30-959a502f399c@2g2000hsn.googlegroups.com>

On May 25, 6:19 pm, miller.pau... at gmail.com wrote:
> Is there any place outside the actual C source for Python that has
> information about the performance of Python's built-in operations? For
> example, I'd *expect* list.append to be O(1), and I hope that list[i]
> is O(1), but I don't really know that for sure, since it would depend
> a lot on the internal implementation.
>
> I'm really only asking this for curiosity's sake --- more as a
> reasonable, non-trollish version of the "Python is slow" post than
> anything. :-)  I've never really had any problems with the performance
> of Python code that I couldn't solve by either changing my algorithm
> or, if all else has truly failed, rewriting in C or Pyrex.
>
> What I'd like to see is something likehttp://svn.python.org/projects/python/trunk/Objects/listsort.txt
> where Python's sorting algorithm is described, except with the focus
> on other built-in constructs.

http://wiki.python.org/moin/TimeComplexity is a start.
>
> Thanks!



From deets at nospam.web.de  Tue May 13 12:40:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:40:54 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
Message-ID: <68tulsF2unducU2@mid.uni-berlin.de>

> This shows how much you don't know about customers, and their needs. A
> customer gives a s**t about 5-10 times faster sites. They care if it is
> *fast enough*, but beyond that they don't bother. But what *always*
> bothers them is development time & flexibility. Because that directly
> affects the price they pay.

Just to support this statement: PHP runs an order of magnitude slower than
python. Yet a great deal (if not the majority) of dynamic sites out there
run under PHP. All of these are unhappy customers?

Diez


From geonomica at gmail.com  Fri May 23 02:03:17 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 23:03:17 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
Message-ID: <f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>

On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > exception like this:
>
> > Traceback (most recent call last):
> >   File "<pyshell#18>", line 1, in <module>
> >     myDLL.myFUNCT()
> >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> >     func = self.__getitem__(name)
> >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> >     func = self._FuncPtr((name_or_ordinal, self))
> > AttributeError: function 'myFUNCT' not found
>
> Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> chance you compiled your C as C++ and name mangling kicked in?
>
> Can you show a minimal C source for a DLL, how you compiled it, what you
> did on the Python side to call it, and how it fails?
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I've located my dll in c:\windows\system32 (in linux I aven't any
problem) and I compiled it with dev-c++. The source code is C standard
ANSII and is quite havy. If you like I can send it via mail (you can
realy at geonomica at gmail.com) . I've tryed to build a wrape with swig
olso with same code and I can access at all the function.
thanks
Gianluca


From bearophileHUGS at lycos.com  Sun May  4 06:50:00 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 4 May 2008 03:50:00 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
Message-ID: <53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>

David:

> What do you mean by best possible? Most efficient? Most readable?

What's a good wine? It's not easy to define what's "good/best". In
such context it's a complex balance of correct, short, fast and
readable (and more, because you need to define a context. This context
refers to Psyco too).


> And why don't you use islice?

You are right, but the purpose of light slices that I have suggested
is to avoid using islice so often. And currently Psyco doesn't digest
itertools well.


> D compiles to efficient machine code so Python is at a disadvantage
> even if you use the same syntax (see my first example). You can make
> the Python version faster, but beware of premature optimization.

This time I don't agree with this "premature optimization" thing. My
original Python version is just 5 lines long, it's readable enough,
and it's a part of a large library of mine of similar functions, they
must be fast because I use them all the time as building blocks in
programs.


> What I'dlike to see is a rope[1] module for Python.

People have already suggested it, and there's even an implementation
to replace Python strings. It was refused because... I don't know why,
maybe its implementation was too much more complex than the current
one, and it wasn't faster in all situations (and I think Guido wants
data structures that try to replace the basic built-in ones to be
faster in all situations and user-transparent too).

Bye,
bearophile


From ivan.illarionov at gmail.com  Fri May 16 21:48:53 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 01:48:53 +0000 (UTC)
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org>
Message-ID: <g0ldi5$2ine$1@news.mtu.ru>

On Wed, 14 May 2008 14:35:25 -0400, Poppy wrote:

> I've put together some code to demonstrate what my goal is though
> looping pixel by pixel it's rather slow.
> 
> import Image
> 
> def check_whitespace():
>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> 
>     size = im.size
> 
>     i = 0
>     whitePixCount = 0
>     while i in range(size[1]):
>         j = 0
>         while j in range(size[0]):
>             p1 = im.getpixel((j,i))
>             if p1 == (255, 255, 255):
>                 whitePixCount = whitePixCount + 1
>                 if whitePixCount >= 492804:  ## ((image dimensions 1404
>                 x
> 1404) / 4) 25%
>                     return "image no good"
>             j = j + 1
>         i = i + 1
> 
>     print whitePixCount
> 
>     return "image is good"
> 
> print check_whitespace()
> 
> 
> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>I need to write a program to examine images (JPG) and determine how much
>>area is whitespace. We need to throw a returned image out if too much of
>>it is whitespace from the dataset we're working with. I've been
>>examining the Python Image Library and can not determine if it offers
>>the needed functionality. Does anyone have suggestions of other image
>>libraries I should be looking at it, or if PIL can do what I need?
>>

PIL will do this, use histogram() method of Image objects.

-- Ivan


From torriem at gmail.com  Mon May 12 00:09:11 2008
From: torriem at gmail.com (Michael Torrie)
Date: Sun, 11 May 2008 22:09:11 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
Message-ID: <4827C2E7.2040703@gmail.com>

Larry Hale wrote:
> ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> file... still no-go.  :/

It's often the custom of programs ported from unix to windows to use the
dll location as a key to find the other files that are typically in
share, or etc.  GTK, for example uses ../share and ../etc from the
location where the dlls are stored (if the dlls are in a folder called bin).

In this case I'd try making a folder in the Python25 folder called
"share" and put the contents of the gnuwin32 share/file stuff in there.
 Should look something like this:

c:/python25/share/file/magic.mime.mgc
c:/python25/share/file/magic
c:/python25/share/file/magic.mgc
c:/python25/share/file/magic.mime

Or, judging by a string I found in the dll itself, you might have to put
the files here:

c:/progra~1/File/share/file/magic

Although if such a path really is hardcoded into the dll, this is
certainly a bug, since it will fail on certain non-english windows systems.

Anyway, who knows.  Give these options a try.



From larzluv at hotmail.com  Sun May 11 21:51:28 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:51:28 -0700 (PDT)
Subject: list object
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
Message-ID: <4dbdd79b-3364-4fe1-9cd8-6ae5e1394309@d45g2000hsc.googlegroups.com>

On May 10, 12:39 pm, Gandalf <goldn... at gmail.com> wrote:
> my manual contain chapter about lists with python. when i try to copy
> paste :
>
> li = ["a", "b", "mpilgrim", "z", "example"] (1)
>
> it i get this errore:
>
> "TypeError: 'list' object is not callable"
>
> i was wondering if their is  any special module I should import before
> i use this function
>
> i know i ask foolish questions it's my first day with python and i
> have experience only with PHP and javascript, so please be patient
>
> thanks


To expand upon what others have already mentioned, and/or to explain
what's going on...

    li ==>> a label for a "list" (presume the author used it as short-
hand?); trying to set it to point-to/"equal"...

    ["a", "b", "mpilgrim", "z", "example"] ==>> THE LIST

        A "list" is a mutable (changeable in-place) container object.
See e.g.: http://www.diveintopython.org/native_data_types/lists.html

    (1) ==>> the Python interpreter will interpret this as if you're
attempting to "call" the list object (["a", "b", ...]) as if it were a
function/method


Indeed, the "(1)" is what's causing the problem, but it's -because-
the list *object* is, well, "not callable".  :)

As an aside, see what "li" contains if you do:

    li = ["a", "b", "mpilgrim", "z", "example"][1]

;)


Cheers!
-Larry Hale


From ivan.illarionov at gmail.com  Tue May 27 21:32:24 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 01:32:24 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
Message-ID: <g1icn8$r5$1@news.mtu.ru>

On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:

> Greetings, Ivan Illarionov.
> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
> 
>>> As I've said before - good programmers can write good code in any
>>> language.
> 
>> Yes, they can. But it may be harder to do for them in one language and
>> easier in another.
> 
> It's obvious lie. If you have clear mind and you know language you're
> using, there are absolutely NOTHING can deny you to write clear code.
> Even using forth postfix notation, I have no problem writing good code,
> it's as easy as writing bad code. And yes, I do see the difference.

No. Language does matter.


From casey.mcginty at gmail.com  Mon May 26 04:00:07 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 22:00:07 -1000
Subject: Fwd: Organizing a Python project
In-Reply-To: <ae3f58470805260058u2ba2815fnef106e00f0fb142@mail.gmail.com>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>
	<op.ubqp8mn1x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805260058u2ba2815fnef106e00f0fb142@mail.gmail.com>
Message-ID: <ae3f58470805260100q28252a36nb5a3426c1fd8f643@mail.gmail.com>

On Sun, May 25, 2008 at 4:51 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Sun, 25 May 2008 19:46:50 -0300, Casey McGinty <casey.mcginty at gmail.com>
> escribi?:
> > The '_' should indicate that any other modules using your package should
> import
> > that module.
>
> Not only using _package isn't very common - it goes against the general
> rule (this one very well established) that names with a single leading
> _underscore are private (implementation details).
> <http://mail.python.org/mailman/listinfo/python-list>


My mistake. I meant to write, "should *not*", as you pointed out.

- Casey
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From rdm at rcblue.com  Fri May 30 13:56:04 2008
From: rdm at rcblue.com (Dick Moores)
Date: Fri, 30 May 2008 10:56:04 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
In-Reply-To: <dullrich-0FBD1D.09572530052008@text.giganews.com>
References: <mailman.1689.1211986714.12834.python-list@python.org>
	<dullrich-0FBD1D.09572530052008@text.giganews.com>
Message-ID: <20080530175628.BCCB01E4005@bag.python.org>

At 07:57 AM 5/30/2008, David C. Ullrich wrote:
>In article <mailman.1689.1211986714.12834.python-list at python.org>,
>  Dick Moores <rdm at rcblue.com> wrote:
>
> > I've been using Ulipad, a free IDE mainly for Python, and written in
> > wxPython, for a couple of years, and think it's terrific. Now another
> > user, Kelie Feng, has made an 8-minute video showing it off. The
> > visual clarity of the video is remarkable. You can download it
> > (Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may
> > be necessary for your player, from <http://www.rcblue.com/u3/>.
>
>I skipped the video and tried Ulipad. Looks very interesting.
>
>The documentation I got is mostly in Chinese. Is there an
>English version somewhere?

F1 will open "UliPad Documentations". Check out the HowTo's and the 
FAQ. And subscribe to the Ulipad list at Google Groups 
(<http://groups.google.com/group/ulipad>). The main developer, 
Limodou, is in Beijing, but he's very quick in answering questions 
posed to the list.

Dick Moores



From tjreedy at udel.edu  Sat May 10 14:56:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 14:56:41 -0400
Subject: list object
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
	<3d881a310805101047s1cc9c803wb87805e8044b514c@mail.gmail.com>
Message-ID: <g04r59$ifd$1@ger.gmane.org>


"member thudfoo" <thudfoo at opensuse.us> wrote in message 
news:3d881a310805101047s1cc9c803wb87805e8044b514c at mail.gmail.com...
| On 5/10/08, Gandalf <goldnery at gmail.com> wrote:
| > my manual contain chapter about lists with python. when i try to copy
| >  paste :
| >
| >  li = ["a", "b", "mpilgrim", "z", "example"] (1)
| >
| >
| >  it i get this errore:
| >
| >  "TypeError: 'list' object is not callable"

| Remove the "(1)"

The '(1)' was almost certainly an 'equation number' or 'line label' added 
so the author could refer it in the text, like 'type line (1) into the 
interpreter and... .  This is a standard mathematical idiom, but sometimes 
confusing when there is not enough space between the equation and the 
label, and especially when the equation label *could* be part of the 
equation, as with Python.






From upton at virginia.edu  Wed May 28 14:48:36 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 28 May 2008 14:48:36 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805281148w11581481x4257af4a5f6f762b@mail.gmail.com>

On Wed, May 28, 2008 at 11:09 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
>> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>>
>> So what does this do exactly if the set throws an error?
>
> I think the catch should catch the error thrown by set, compare it to
> 0.1, the comparison will not return true because the error is not less
> than 0.1, and so the go-to to tinyanswer will not be taken.
>

The semantics you're describing aren't clear here.  I suppose that's
sort of reasonable, given that you haven't implemented it yet, but
let's think about it for a second.  You say the catch construct should
catch the error thrown by set, but there's no reason "set" itself
should throw any sort of error in the sense of an exception--in a
statement like "Set x to SomeFunctionThatCanBlowUp()", the semantics
should clearly be that the error comes from the function.  In a simple
addition statement, that makes no sense.  So then I considered that
maybe you meant the error in the sense of some determination of
floating point roundoff error, but that can't be it, since you've
claimed recently a big win over Python with FT in that it has no
roundoff error.  So what, exactly, is the error you could even be
catching in that?  Assuming the answer is "You're right, there's no
actual error that could generated by that assignment," there are two
options: the compiler optimizes it away, or you throw a compile-time
error.  The latter makes more sense, as someone trying to catch an
exception where one can't possibly exist probably indicates a
misunderstanding of what's going on.

> ...  That's why C had to
> resort to the confusing "=" vs "==" notation -- to disambiguate the
> two cases.  The "catch" keyword unambiguously alerts the reader that
> the parenthesis contain a statement (or a whole list of statements).
>

However, I think overloading your catch error types to include objects
(or integral values, I guess, your example below isn't clear) along
with real values (ignoring the bit above about whether floating-point
assignment could throw an error) makes things confusing.  It's nice
that "catch(stuff)" indicates that there's one or more statements
inside, but so does indentation in Python, bracketing in C/C++,
Begin/End in <insert language here>, and so forth, but it doesn't give
any indication to what could come out and ideally, only one thing (or
its descendants in a type hierarchy) can come out.  (I suppose this
can be solved by overloading your comparison operators.)  Beyond that,
I think you would want a good mechanism for comparing ranges of values
if you want to make exceptions/errors real-valued.

>> For that matter, is there any way to distinguish between different errors
>> and only catch particular ones?
>
> I think the catch function should catch all of the errors (and the non-
> error result if no error occured), so I think distinguishing the error
> would have to come after.  Maybe something like:
>
> Set result to catch(read x from "input.txt".).
> If result = dividebyzeroerror then ... else throw result.
>
> I'm open to alternate suggestions, though.
>


From skunkwerk at gmail.com  Tue May  6 14:41:07 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Tue, 6 May 2008 11:41:07 -0700 (PDT)
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
	<65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>
	<mailman.621.1210027504.12834.python-list@python.org>
Message-ID: <ea882cb3-340d-4cee-a1c0-3264eed86f63@p25g2000pri.googlegroups.com>

On May 5, 3:44?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 05 May 2008 13:02:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
>
>
> > On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
> >> > i'm redirecting the stdout & stderr of my python program to a log.
> >> > Tests i've done on a simple program with print statements, etc. work
> >> > fine. ?however, in my actual program i get weird output like this:
>
> >> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> >> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> >> > if any
> >> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
>
> >> Try this simplified example and see by yourself:
>
> >> import sys
>
> >> class Write2Log:
> >> ? ? ?def write(self, x):
> >> ? ? ? ? ?sys.__stdout__.write('[%s]' % x)
>
> >> sys.stdout = Write2Log()
>
> >> print "Hello world!"
> >> age = 27
> >> name = "John"
> >> print "My name is", name, "and I am", age, "years old."
>
> > thanks Gabriel,
> > ? ?i tried the code you sent and got output like the following:
> > [My name is][][john][][and I am][][27][][years old.]
>
> > it doesn't really help me though. ?does this have any advantages over
> > the syntax i was using?
> > are there any limits on what kind of objects the logger can write? ?ie
> > ascii strings of any length?
>
> The example doesn't use any logger, so loggers aren't the problem here, ok?
>
> The write function above puts square brackets [] around anything it receives. This way you can see exactly how write() is called: once per *item* in the print statement, plus once per comma used (with an space character that you didn't copy correctly).
>
> Back to your original code, you have to call logger.debug with a *line* of text, but you are calling it with many small pieces - that's the problem. Accumulate output until you see a '\n' - then join all the pieces into a single, complete line and finally call logger.debug
>
> --
> Gabriel Genellina

thanks Gabriel,
   i wrote the function below, but am now getting an "Error in
sys.exitfunc:" error (which disappears when i comment out the last two
lines below):

class write2Log:
        def write(self, x):
		if x!=',':#ignore if a comma
			if str(x).count('\n')==0:
				buffer += str(x)
			else:
				list = str(x).split('\n')
				logger.debug(buffer)
				buffer = ""
				for text in list:
					logger.debug(text)

sys.stdout = write2Log()
sys.stderr= write2Log()

any ideas what might be wrong?
thanks again


From xahlee at gmail.com  Wed May 21 12:28:43 2008
From: xahlee at gmail.com (Xah)
Date: Wed, 21 May 2008 09:28:43 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
	<c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com>
Message-ID: <6c89401d-992c-44a2-b650-f28b2d2d537f@f24g2000prh.googlegroups.com>

alex23 wrote:
?No, what was generally rejected was the idea that *you* could bring
more clarity to the documentation, based on the complete absence of it
in your posts & "essays". Basically, noone wanted docs that would
randomly degenerate into ad hominem accusations of elitism aimed at
the module authors.?

Dear Alex moron number 23,

The art of writing takes many forms.

Let's take, the hallowed name Shakespeare.

Imagine, we injest his writing style into modern journalism. What is
the resulting quality? It would be condemned as the worst journalism
possible. Imprecise, logorrhea, obscure, and in general, much ado
about nothing.

On the other hand, if we apply the spirit of scientific report into
poetry, what is the resulting quality? Dry, inert, dead. A man without
a cock, a woman without tits.

You see, i had to craft my style to fit occasions. In dealing with
newsgroup morons like yourself, the proper style is to infuse insult
with fanfare.

Further readings:

The Tragedy Of Titus Andronicus
 http://xahlee.org/p/titus/titus.html

Politics and the English Language
 http://xahlee.org/p/george_orwell_english.html

English Lawers (or, how to master writing)
 http://xahlee.org/UnixResource_dir/writ/english_lawers.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From chris.lyon at spritenote.co.uk  Tue May  6 05:53:08 2008
From: chris.lyon at spritenote.co.uk (wyleu)
Date: Tue, 6 May 2008 02:53:08 -0700 (PDT)
Subject: parameters to lambda's executed at run time.
Message-ID: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>

I'm trying to supply parameters to a function that is called at a
later time as in the code below:

llist = []

for item in range(5):
    llist.append(lambda: func(item))

def func(item):
    print item

for thing in llist:
    thing()

which produces the result

IDLE 1.2.1
>>> ================================ RESTART ================================
>>>
<function <lambda> at 0xb716356c>
<function <lambda> at 0xb71635a4>
<function <lambda> at 0xb71635dc>
<function <lambda> at 0xb7163614>
<function <lambda> at 0xb716364c>
>>> ================================ RESTART ================================
>>>
4
4
4
4
4
>>>

How can one allocate a different parameter to each instance of the
function rather than all of them getting the final value of the loop?



From kyosohma at gmail.com  Sun May 18 13:04:42 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sun, 18 May 2008 10:04:42 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com> 
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>
Message-ID: <cc3d8639-9f34-4d58-a68e-f9302faa354e@t54g2000hsg.googlegroups.com>

On May 17, 10:13?am, eliben <eli... at gmail.com> wrote:
> On May 17, 3:23 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 17, 4:42 am, eliben <eli... at gmail.com> wrote:
>
> > > Hello,
>
> > > I'm getting into Python now after years of Perl, and as part of my
> > > research I must understand how to do some common tasks I need.
>
> > > I have a bunch of Windows PCs at work to which I want to distribute an
> > > application I've developed on my PC. All these PCs have Python 2.5
> > > installed.
>
> > > If my application contains only code I've developed, I simply zip its
> > > directory with .py files and send it to everyone, who can then use it
> > > by running the entry-point .py file. However, what if I've installed
> > > some 3rd party modules on my PC, and my application uses them (for
> > > example pyparsing, PiYAML and some others) ? I don't want to manually
> > > install all these packages (there may be dozens of them) on all those
> > > PCs (there may be dozens of those too). What is the best method I can
> > > use ? Naturally, I want all the non-standard packages my app uses to
> > > be detected automatically and collected into some kind of convenient
> > > distributable that is easy to pass around and run.
>
> > > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > > executables, and I don't want to distribute those all the time. I much
> > > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > > Thanks in advance,
> > > Eli
>
> > You might want to check out Buildout. It allows you to run all that
> > stuff in it's own virtual world, so to speak. I'm planning on playing
> > with it this week.
>
> I looked at its examples and I'm not sure it's what I need. It seems
> useful for other cases though.
>
> > Also, there's this site which has collected the various means of
> > distributing Python apps:
>
> >http://www.freehackers.org/Packaging_a_python_program
>
> This page only talks about the packagers that create .exe files that
> don't need Python installed.
>
> Is there a simple way to find out which packages are used by my
> script ?
>
> Eli

I'm fairly certain you can use that Freeze application to do the dirty
work for you. Or you can just distribute the pyc files...I've heard
that works somehow too.

Mike


From clyfish at gmail.com  Wed May  7 23:11:04 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Wed, 7 May 2008 20:11:04 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<0c999d92-e3e5-4f5c-b636-73739abd675a@1g2000prg.googlegroups.com>
Message-ID: <482d3eed-a7ff-4419-9340-64b7809beea0@n1g2000prb.googlegroups.com>

On 5?7?, ??2?41?, alito <alito... at gmail.com> wrote:
> On May 6, 7:19 pm, clyf... at gmail.com wrote:
>
> > In cmd, I can use find like this.
>
> > C:\>netstat -an | find "445"
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
>
> > C:\>
>
> > And os.system is OK.>>> import os
> > >>> os.system('netstat -an | find "445"')
>
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
> > 0
>
> > But I don't know how to use subprocess.Popen to do this.
>
> > from subprocess import Popen, PIPE
>
> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> > print p2.stdout.read()
>
> Get rid of the extra quotes.  ie:
> p2 = Popen(['find',  '445'], stdin = p1.stdout, stdout = PIPE)
>
> The quotes on the command line and on the os.system call are consumed
> by the shell.  The program doesn't see them.

You must be a linux user:)

I guess, in windows, the quotes are consumed by the c runtime library.
Mayby the "find" in windows doesn't use the argc/argv but the windows
API GetCommandLine().

I wrote a c program to prove it.

#include <windows.h>
#include <stdio.h>

int main(int argc, char **argv) {
    int i;

    printf("%s\n", GetCommandLine());
    for (i = 0; i < argc; ++i)
        printf("%d: %s\n", i, argv[i]);

    return 0;
}

The output is:
C:\>test 1 2 "3"
test 1 2 "3"
0: test
1: 1
2: 2
3: 3

C:\>

Notice that, GetCommandLine() does not consume the quotes, but the
(char **argv) does.


From gagsl-py2 at yahoo.com.ar  Fri May  2 12:30:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 13:30:24 -0300
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
Message-ID: <op.uajb4yrtx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 10:30:03 -0300, Nick Craig-Wood <nick at craig-wood.com>  
escribi?:

> As for where to store it, I use os.path.expanduser("~") to find the
> base directory and a bit of platform specific code.
>
> Something like this snippet
>
>     self.is_windows = sys.platform == 'win32'
>     self.home = os.path.expanduser("~")
>     if self.is_windows:
>         self.config_dir = os.path.join(self.home, "Application Data",  
> self.NAME)
>     else:
>         self.config_dir = os.path.join(self.home, "."+self.NAME)
>     if not os.path.isdir(self.config_dir):
>         os.makedirs(self.config_dir, mode=0700)
>     self.config_file = os.path.join(self.config_dir, "config")

Please don't do that if you distribute your programs. "Application Data"  
is a localized name, like "Program Files" and all special folders. On my  
Spanish version of Windows, they're "Datos de programa" y "Archivos de  
Programa" respectively, and the user may choose to move them to another  
location.
Use SHGetFolderPath to obtain the path; see  
http://msdn.microsoft.com/en-us/library/bb762181(VS.85).aspx

-- 
Gabriel Genellina



From kyrie at uh.cu  Wed May  7 16:39:30 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 7 May 2008 16:39:30 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805072119.30744.onsen-neko@gmx.net>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
Message-ID: <200805071639.30414.kyrie@uh.cu>

On Wednesday 07 May 2008 03:19:30 pm Daniel Marcel Eichler wrote:
> Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:
>
> Well, no. It's a litte different. Interfaces force to implement methods.
> Simple inheritance with method-stubs can't garantee that a specific
> method is reimplementat in a sub-class. Interfaces work at
> compile-time, while method-stubs raise at their first call, so in worst
> case, never (when the developer is available).

<Pseudo-java code>
class MyClass implements MyInterfaceWithPassMethod {
     function Pass() {
     }
}
</pseudo-java code>

There you have it, interfaces are not enough to ensure that the implementors 
actually implement the methods. They are useful for warning at compile time 
if there is a missing method, but nothing more. I believe you could achieve a 
very similar warning in python using some kind of Interface metaclass (too 
lazy right now to hack a proof of concept, but it looks doable).

I actually like the Interface concept... as portrayed by zope.Interfaces and 
pyprotocols (not the same thing, but I like them), and the ABCs (these, not 
so much). But Java interfaces are barely a replacement for multiple 
inheritance+abstract methods.

> That's the point. Interfaces garantee that a duck is a duck, an not only
> a chicken that quack.

Not really. (See the NotImplementedExceptions in .NET 1.1 and window forms, 
and/or their TabbedControl/TabPage background color attribute. Can't find 
them now, as I don't have .NET anymore, but I consider that an example of why 
the static typing are... overrated)

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From see at sig.below  Sat May 10 19:25:43 2008
From: see at sig.below (Barb Knox)
Date: Sun, 11 May 2008 11:25:43 +1200
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
	<48257ab7$0$29576$c83e3ef6@nn1-read.tele2.net>
Message-ID: <see-68826E.11254311052008@lust.ihug.co.nz>

In article <48257ab7$0$29576$c83e3ef6 at nn1-read.tele2.net>,
 Lars Rune N??stdal <larsnostdal at gmail.com> wrote:

> Hi,
> Finite automata works for "nested things".

Only in the special case when the depth of nesting is bounded ahead of 
time.  If it's unbounded then there is an unbounded amount of "stack" 
information that the automaton needs to remember, therefore a finite 
automaton cannot do it.

<pedantry>
That should be "Finite automata WORK ...", since "automata" is plural.
</pedantry>

> http://en.wikipedia.org/wiki/Automata_theory

-- 
---------------------------
|  BBB                b    \     Barbara at LivingHistory stop co stop uk
|  B  B   aa     rrr  b     |
|  BBB   a  a   r     bbb   |    Quidquid latine dictum sit,
|  B  B  a  a   r     b  b  |    altum viditur.
|  BBB    aa a  r     bbb   |   
-----------------------------


From deets at nospam.web.de  Tue May  6 08:53:06 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 14:53:06 +0200
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <68b2meF2s3iqjU1@mid.uni-berlin.de>

krumblebunk at gmail.com wrote:

> Hello gurus,
> 
> I am learning Python to take the place of Perl in my toolbox of bits
> and bobs, and writing something pretty simple in theory, but having a
> hard time in Python with it - I am using a 3rd party module, and I am
> sure the etiquette of this channel states that this is pure Python
> questions only, but please bare with me in light of this, as my
> question does indeed relate to Python only.
> 
> I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
> module), and when it returns the result, I am pulling it out as such:
> 
> try:
>     sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
> except pg.InternalError:
>     print "Failed to execute SQL: %s" % sql
>     exit
> 
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result
>     f=dict(foo)
>     for k in f.iteritems()
>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.
>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.
> 
> This breaks spectacularly -
> 
> any ideas?

Use the module "re" to create regular expressions & out of these
mather-objects that will give you what you need.

The idiom is roughly translated to this:

m = re.search(r"^Hostname')
if m:
   ...

Diez


From tjreedy at udel.edu  Sun May 25 21:43:22 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:43:22 -0400
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <g1d4jo$h0g$1@ger.gmane.org>


<miller.paul.w at gmail.com> wrote in message 
news:d7549dfd-6770-4924-8f0c-1746642bd8a4 at k37g2000hsf.googlegroups.com...
| Is there any place outside the actual C source for Python that has
| information about the performance of Python's built-in operations?

Unfortunately no.  Guido does not want to put guarantees in the language 
definition, so there is no urgency to document this.  An auxiliary doc 
might be accepted.  But the people who could write such a thing are busy 
doing otherwise.  Certainly, no one has volunteered to write *and update* 
such. 





From kyosohma at gmail.com  Sat May 10 15:28:53 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 10 May 2008 12:28:53 -0700 (PDT)
Subject: Is there a PyPI API?
References: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com> 
	<4825F62C.9050407@v.loewis.de>
Message-ID: <f49a80be-e185-41b8-ae12-0d9c19953c48@x41g2000hsb.googlegroups.com>

On May 10, 2:23 pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > I just can't figure out how to get the metadata, I guess.
>
> See
>
> http://wiki.python.org/moin/PyPiXmlRpc
>
> Regards,
> Martin

Ah-so. Most helpful, Martin. Thanks a lot!

Mike


From cjames at callone.net  Mon May  5 08:31:35 2008
From: cjames at callone.net (c james)
Date: Mon, 05 May 2008 07:31:35 -0500
Subject: Problems with psycopg2
In-Reply-To: <5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>
References: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
	<5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>
Message-ID: <fvmun7$otn$1@ger.gmane.org>

David Anderson wrote:
> The thing is this query works fine on the console through psql, but not 
> in my code? can anyone explain me why?
> 
> On Thu, May 1, 2008 at 9:31 PM, David Anderson <zerty.david at gmail.com 
> <mailto:zerty.david at gmail.com>> wrote:
> 
>     Hi all
>     I have this function:
>     def checkName(self, name):
>             cur = self.conn.cursor()
>          
>             sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
>             cur.execute(sql)
>             rows = cur.fetchall()
>            
>             if rows == "[]":
>                 self.insert()
> 
>     It seems to work fine, But I'm getting this exception:
>     psycopg2.ProgrammingError: current transaction is aborted, commands
>     ignored until end of transaction block
>     at: cur.execute(sql)
> 
>     What's the problem?
>     thx
> 
>     ps: fn_pat is the column of the db, name is the string passed in the
>     function parameter
> 
> 
> 
> ------------------------------------------------------------------------
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

Does `name` happen to have an apostrophe in it?  You may want to look at 
using bind variables.

cur.execute("SELECT * from patient WHERE fn_pat=%(name)s",
             {'name': name})


http://wiki.python.org/moin/DbApiCheatSheet
http://mail.python.org/pipermail/python-list/2005-March/314154.html



From http  Fri May  2 03:28:40 2008
From: http (Paul Rubin)
Date: 02 May 2008 00:28:40 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <7xbq3pjhav.fsf@ruckus.brouhaha.com>

AlFire <spamgrinder.trylater at ggmail.com> writes:
> But I still can not believe that +=1 is not a thread safe operation.

In CPython I believe it is thread safe, because of the global
interpreter lock.  Thread switches can happen only between bytecode
executions, not in the middle of a bytecode, even though executing a
bytecode can take several machine instructions.


From conrad at lewscanon.com.invalid  Fri May 30 19:33:22 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Fri, 30 May 2008 19:33:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <6abgirF358rgoU1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<6abgirF358rgoU1@mid.individual.net>
Message-ID: <u92dncc7VuoxE93VnZ2dnUVZ_hydnZ2d@comcast.com>

Gordon Etly wrote:
> Lew wrote:
>> John Thingstad wrote:
> 
>>> Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> I don't like the style, but many do.
> 
>> Please exclude the Java newsgroups from this discussion.
> 
> Why? Do you speak for everyone in that, this, or other groups?

I don't know why you'd even want to impose your Perl conversation on the Java 
group in the first place, troll.

Plonk.

-- 
Lew


From dullrich at sprynet.com  Fri May 16 11:58:46 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 16 May 2008 10:58:46 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
Message-ID: <7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>

On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
<gagsl-py2 at yahoo.com.ar> wrote:

>En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich <dullrich at sprynet.com> escribi?:
>
>> Having a hard time phrasing this in the form
>> of a question...
>>
>> The other day I saw a thread where someone asked
>> about overrideable properties and nobody offered
>> the advice that properties are Bad. So maybe we've
>> got over that. I suppose properties could have
>> Bad consequences if a user doesn't know they exist
>> and think that a certain property of an object is
>> just an ordinary attribute. But that applies to
>> almost any aspect of any language.
>
>Which "bad consequences" are you thinking of? 

Didn't have anything specific in mind - there I was
just playing devil's advocate. I've seen a lot of people
here say things like "properties should only be used
when refactoring" without any explanation that I could
see of why properties were bad things. I was referring
to whatever problems they had in mind.

>Apart from the user not being aware of the complexity of certain operations, or a getter/setter very time-consuming (in that case I'd use public getXXX/setXXX functions instead, to emphasize that "something" is happening, not just an attribute lookup)
>
>> If a person comes from, say, Object Pascal (Delphi)
>> then properties are hard to live without. The
>
>You should read the article "Python is not Java" if you haven't done it yet.
>http://dirtsimple.org/2004/12/python-is-not-java.html

I suspect you misunderstood my point there. I actually read that
article years ago. Been using Python for years. I'd never confuse
it with OP, I promise (luckily I don't know any Java and don't
intend to). I really didn't express what I meant very well - what
I should have said was more like "If you're accustomed to properties
from a language like OP they seem like a very useful addition to
Python".

Looking at the article it seems like two points are relevant.
(i) I'm well aware that chains of attribute accesses don't
get compiled away in Python the way they do in OP.

(ii) Regarding the bit about how getters and setters are
evil, and it's also bad to wrap things in properties when
simple attributes would do. Yes. Thanks for pointing
that out, but I wouldn't do that - using a property where
a simple attribute would do would be stupid. But they
_can_ be much nicer than having to use explicit getters
and setters, in cases where a simple attribute won't do.

I got started on this thinking about making myself a
nicer interface (nicer-seeming to me) to the wxPython
grid object. Being able to say

  grid[row, col] = value

seems much nicer and more natural than

  grid.SetCellValue(row, col, value)

(yes, _that_ one is just __get(set)item__,
no property needed), just as 

  window.pos = (x,y)

seems more natural than

  window.SetPos(x,y);

in these cases the work involved in changing the cell
value or the window position is going to make the
extra overhead of the property interface irrelevant.

>> other day I decided I wanted what OP calls an
>> "indexed property" or "array property". Couldn't
>> figure out how to make a _property_ behave that way.
>> So I read a little bit about descriptors, and a
>> few minutes later I had an indexedproperty thing
>> that works just like property, except it gives
>> an indexed property! This is just too cool.
>>
>> Why? For example, a Matrix should have a row[n]
>> property allowing things like
>>
>> m.row[0] = m.row[1] + m.row[2]
>>
>> Ok, you could do _that_ by just making row
>> an ordinary list of Row objects. But then
>> you'd have to say
>>
>> m.row[0] = Row([1,2,3])
>>
>> where I want to be able to say
>>
>> m.row[0] = [1,2,3]
>>
>> and have the Row created automatically.
>
>One could make *row* an object with a custom __getitem__/__setitem__ in this case. 

But then [see below]

>But I prefer to have as little magic as possible on my objects: if it says m.row[0] = [1,2,3] I 
>expect m.row[0] to actually *be* that list (whenever possible), and not any other object initialized 
>from the [1,2,3] arguments. (Maybe this is some overreaction against C++ "magic" constructors and such horrible things...)

Whatever - the idea here is that m.row[0] is going to walk and quack 
exactly like that list would, but also do other things that the liist
can't do, like you can add two of them.

(When you say anobject.aproperty = 2 you also expect aproperty to
be 2? But if aproperty is a property that's not necessarily so - this
seems like as much an argument against properties in general as
against my version. Or perversion, if you like.)

>> _Also_ with these indexed properties my Matrix
>> can have m.row[j] and m.col[k] that look exactly
>> the same to a client - we don't want to store a
>> list of rows internally and also store the same
>> data in a list of columns. Too cool.
>
>The same can be achieved having m.row and m.col be custom objects like I said above.
>
>> Hmm, none of that's a valid excuse for a post here.
>> Um, right, here we go: Anyone see problems or
>> possible improvements with the implementation
>> of indexedproperty below?
>
>Note that the property object (or your indexedproperty) is a *class* attribute. That is, shared among all instances.
>
>> class indexedproperty(object):
>>   def __init__(self, getitem=None, setitem=None):
>>     self.getitem = getitem
>>     self.setitem = setitem
>>
>>   def __get__(self, obj, owner):
>>     self.obj = obj
>>     return self
>
>Here is the problem. You can't store "obj" in "self" because it is shared among all instances. Your examples don't show any problem because all property accesses are immediately followed by a getitem access using the same object. Try this:
>
>x = AClass()
>y = AClass()
>x.cell[0,0] = 1
>print x.cell[1,1]   # output: 0
>y.cell[x.cell[0,0], x.cell[0,0]] = 2
>print y.cell[1,1]   # should be 2, still 0
>print x.cell[1,1]   # should still be 0, but changed, now 2

Eewps. I did realize that the "indexedproperty" object was going to be
shared, but I thought this sort of problem would be taken care of by
the fact that self.obj was reset each time __get__ was called. I
guess not.

_A_ workaround would be to simply not have indexedproperties
be class attributes, instead saying self.whatever =
indexedproprty(whatever) in __init__.

>A workaround would be to return another object in __get__ instead of self, which remembers the "obj" instance, or a closure, or...
>But I don't really see the point, it's a lot easier to use another object for .cell (it's more clear, doesn't break encapsulation, divides responsabilities...)
>
>class Matrix2x2(object):
>   def __init__(self):
>     self.cells = [[0,0], [0,0]]
>
>   def __setitem__(self, (row, col), value):
>     self.cells[row][col] = value
>
>   def __getitem__(self, (row, col)):
>     return self.cells[row][col]
>
>class AClass(object):
>   def __init__(self):
>     self.cell = Matrix2x2()

Well, something like this is where I was before coming up with
the indexedproperty thing. Unless I'm missing something, which
has happened before, what you write above can't work, because
self.cell has to know what Matrix2x2 created it so it knows
what AClass instance to modify when it's modified. (No, we
can't just leave the state information in self.cells; think of the
case of a Matrix with a row[] property and also a col[]
property - they have to be modifying the data stored in
the owning matrix.)

So it would have to be more something like (untested,
I don't have Python on this machine right now)

class Matrix2x2(object):
   def __init__(self, owner):
     self.owner = owner

   def __setitem__(self, (row, col), value):
     self.owner.data[row][col] = value

   def __getitem__(self, (row, col)):
     return self.owner.data[row][col]

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2(self)
     self.data = [[0, 0], [0, 0]]

(again, it doesn't have to be like that in this case,
but it does in the case where various "properties"
like cells are giving different sorts of access to the
same data, which data then has to be stored in AClass.)

And then that's the point to the indexedproperty;
the code passing data back and forth doesn't need
to be rewritten with each property, it's all done
inside the implementation of the indexedproperty
class. I realized that I could just use object attributes
instead, but it seems to me that indexedproperty
encapsulates the data-passing protcol once and for
all instead of requiring it to be redone each time.

Thanks for the comments, especially for pointing out
the bug. Before doing this I reproduced a Python
implementation of "property". Gonna have to look
that up instead of figuring it out to make sure I got
it right, then look at it to see why property
doesn't have the same problem... 
David C. Ullrich


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:48:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:48:01 -0300
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<m263tiapzt.fsf@googlemail.com>
	<fac0145c-d4c1-4faa-84b9-033b74047b0a@56g2000hsm.googlegroups.com>
Message-ID: <op.ua4qebr9x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 18:06:13 -0300, <yguan08 at gmail.com> escribi?:

> On May 13, 3:49?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> ygua... at gmail.com writes:
>> > I have trouble of obtaining the file size of a file because the
>> > fullpath exceeds 255 characters. I get this message with

> WindowsError: [Error 206] The filename or extension is too long: '\\\\?
> \\UNC\\LOSSSFS002\\NWE_TECHNICAL\\05. UK\\Schiehallion (204_25a)\
> \Amos&Burke_P559\\07. Technical (Subsurface)\\06. Well Planning\\Amos\
> \Daily Reports\\Wireline\\final_204_25a_8z\\204_25a_8z\\Run_1A\
> \HRLA_SP_DSI_PEX_HNGS_ECRD\\ANCILLARY\\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las'

In addition to starting with \\?\UNC\, the path has to be an Unicode  
string, and already normalized (that is, it cannot contain . nor ..  
components)

-- 
Gabriel Genellina



From jeffober at gmail.com  Thu May 22 08:06:32 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 22 May 2008 05:06:32 -0700 (PDT)
Subject: wsdl2py throwing error while creating client side code
References: <edd91cd3-789e-447f-ac92-03bf83d228ad@z16g2000prn.googlegroups.com>
Message-ID: <7df9d525-4fd5-4175-b5c4-67cab5184bed@e39g2000hsf.googlegroups.com>

Looks to me like you have the incorrect version of ZSI installed.


From paddy3118 at googlemail.com  Wed May 21 01:22:38 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 22:22:38 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<pecora-E07827.15095919052008@ra.nrl.navy.mil>
Message-ID: <3c04a0da-eb5c-4db6-8416-1b04ea9a4603@y38g2000hsy.googlegroups.com>

On May 19, 8:09 pm, Lou Pecora <pec... at anvil.nrl.navy.mil> wrote:
> In article <hifYj.43082$4B6.9... at newsfe14.ams2>,
>  Roel Schroeven <rschroev_nospam... at fastmail.fm> wrote:
>
>
>
> > Bruno Desthuilliers schreef:
> > > 1/ being interpreted or compiled (for whatever definition of these
> > > terms) is not a property of a language, but a property of an
> > > implementation of a language.
>
> > > 2/ actually, all known Python implementations compile to byte-code.
>
> > You keep saying that, and in theory you're right. But I'm still inclined
> > to disagree with it, since the practical reality is different. Python is
> > indeed compiled to byte code, but if you compare that byte code with
> > assembly code you'll see that there's a whole world of difference
> > between the two, largely because of the dynamical nature of Python. Fact
> > is that Python was designed from the start to run on a virtual machine,
> > not on the native hardware.
>
> > C OTOH was designed to be compiled to assembly code (or directly to
> > machine code) and as a result there are no (or virtually) no
> > implementations that interpret C or compile it to bytecode.
>
> But how about this C/C++ interpreter.  Dr. Dobbs article:  http://www.ddj.com/cpp/184402054.  Title and first two paragraphs:
>
> Ch: A C/C++ Interpreter for Script Computing
> Interactive computing in C
>
> Ch is a complete C interpreter that supports all language features and
> standard libraries of the ISO C90 Standard, but extends C with many
> high-level features such as string type and computational arrays as
> first-class objects.
>

If you still end up chasing pointers to implement your data structures
then its still hampered.


From ZeeGeek at gmail.com  Sun May  4 13:56:52 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Sun, 4 May 2008 10:56:52 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
Message-ID: <6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>

On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
>
> > Hi, what's the default localedir for gettext module on windows? In
> > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > order to make the translation work?
>
> %PYTHONHOME%\share\locale

I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
\LC_MESSAGES, but still no luck. The following is the code snippet I
use:

import gettext
gettext.install('testprogram', unicode = True)


From levlozhkin at gmail.com  Sat May  3 22:43:39 2008
From: levlozhkin at gmail.com (lev)
Date: Sat, 3 May 2008 19:43:39 -0700 (PDT)
Subject: Script Optimization
Message-ID: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>

Can anyone provide some advice/suggestions to make a script more
precise/efficient/concise, etc.?
The script verifies checksums, renames dirs/files, edits checksum
filenames, and htm page filenames, all from mp3cd format ([0-9][0-9]
[0-9]xxx.yyy) to something more usable: for ripping an mp3cd to disk
(everything works, but I think it's a bit bulky).

It's too long to post here (160 lines) so here's the link:
http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
(if that doesn't work: http://uppit.com/CKOYHE)

Thanks in advance,
lev


From mh at pixar.com  Wed May 21 03:54:32 2008
From: mh at pixar.com (mh at pixar.com)
Date: Wed, 21 May 2008 07:54:32 GMT
Subject: getting dir(x), but not as list of strings?
Message-ID: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>

I want to iterate over members of a module, something like:

    for i in dir(x):
        if type(i) == types.FunctionType: ...

but of course dir() returns a list of strings.  If x is a module,
how can I get the list of its members as their actual types?

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From casey.mcginty at gmail.com  Thu May 15 04:36:42 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 14 May 2008 22:36:42 -1000
Subject: Sanitised Newsgroup Feeds?
In-Reply-To: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <ae3f58470805150136q5c6590fdp5c1e558e32aea461@mail.gmail.com>

On Wed, May 14, 2008 at 7:47 PM, Paddy <paddy3118 at googlemail.com> wrote:

> Hi,
> Does anyone do a sanitised newsgroup feed? Something like what mail
> filters do for email?
>  <http://mail.python.org/mailman/listinfo/python-list>
>

Hi, I used to read the summary emails and had the same problem. I think the
best method is to subscribe to the list using an e-mail program that can do
spam filtering. Gmail gets rid of about 98% of the spam for me right now and
I mark any spam that gets by. Also, I would put a filter on the python
emails so they don't show up directly in your Inbox. Good luck.

- Casey
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From deets at nospam.web.de  Wed May 14 11:09:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 17:09:34 +0200
Subject: Rename field in Access DB
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
Message-ID: <690dmjF2tkmhnU1@mid.uni-berlin.de>

Iain King wrote:

> I'm manipulating an MS Access db via ADODB with win32com.client.  I
> want to rename a field within a table, but I don't know how to.  I
> assume there is a line of SQL which will do it, but nothing I've tried
> (from searching) has worked.
> Basic code:
> 
> import win32com.client
> connection = win32com.client.Dispatch(r'ADODB.Connection')
> DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> connection.Open(DSN)
> connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> doesn't work
> connection.Close()
> 
> Anyone know how to get this to work?

I don't think Access supports SQL on the DDL-side. Try looking into the
Access COM-Api, maybe you can get a reference to the table and modify it.

Diez


From asmodai at in-nomine.org  Fri May  2 03:54:05 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Fri, 2 May 2008 09:54:05 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <871w4l1cjj.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
Message-ID: <20080502075405.GS78165@nexus.in-nomine.org>

-On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>To my mind, the Python interpreter installed by a package as
>distributed with the OS *is* OS territory and belongs in /usr/bin/.

That's the difference with a distribution, such as Linux, and full OSes ,
such as BSDs or commercial Unix variants. They prefer to keep a pristine
state for the OS vendor files versus what the user can opt to install
himself, hence the /usr/bin - /usr/local/bin separation. Same for sbin, lib,
and so on. It effectively guarantees you can nuke /usr/local without ill
consequences for your OS.

Different philosophies, but after having spent more than 10+ years on too
many Unix and Unix-like systems I know the importance of platform
portability a bit too much and hardcoding a shebang sequence is not the
solution in general. Using env is the, arguably, best solution available.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
Felix, qui potuit rerum cognoscere causas...


From Lie.1296 at gmail.com  Sun May 18 09:23:49 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:23:49 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>

On May 9, 8:57?am, andrej.panj... at climatechange.qld.gov.au wrote:
> On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>
>
> > No, no, no, no, no!
>
> Geez. ?Go easy.
>
>
>
> > You have got it entirely wrong here. Your XOR function simply returns a
> > function which gives you the result of xoring the parameters AT THE TIME
> > WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set
> > cream and icecream (otherwise the call to XOR would have thrown an
> > exception) and at leas one was true. Try setting them both False at the
> > beginning:
>
> > >>> cream = False
> > >>> icecream = False
> > >>> topping = XOR( cream, icecream)
> > >>> cream = True
> > >>> icecream = False
> > >>> print topping()
>
> > False
>
> Ok. I understand this better now. ?I did say I found the documentation
> rather terse on this.
>
> > Using a lambda was a completely pointless exercise here, you could have
> > just returned the result directly:
>
> If I try out a new language, I try to exercise those parts of the
> language that are new to me. ?Now I saw lambdas, an interesting
> structure I hadn't seen before. So I tried them out. ?I get to learn a
> little at the same time as scripting. ?That was the "point". ?I only
> get to optimise my use of a language by trying out various corners of
> it.
>
>
>
> > def TFF(x,y,z) :
> > ? return x and not y and not z
>
> > AddOnly = TFF( options.AddAction, options.ReplaceAction,
> > options.DeleteAction )
> > DeleteOnly = TFF( options.DeleteAction, options.AddAction,
> > options.ReplaceAction )
> > ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
> > options.DeleteAction )
>
> > if not (DeleteOnly or AddOnly or ReplaceOnly):
> > ? print "Error: ?Exactly one of ?[ --add | --replace | --delete ]
> > allowed. "
> > ? parser.print_help()
> > ? exit
>
> > which boils down to:
>
> > if (options.AddAction + options.ReplaceAction +
> > ? ? ? ? options.DeleteAction) != 1:
> > ? ? print "Error: ..."
>
> Indeed, there are many ways this could be done. ?Some are more
> concise, some are more efficient. ?As I said, I did it the way I did
> it to try out lambdas. ?Your way achieves the result, rather elegantly
> I think, but teaches me nothing about using lambdas.
>
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.
>
> Both the responses offer lambda free alternatives. ?That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree. ?So what applications are lambdas suited to? ?I
> think the parameterised function model is one.
> What else?

Lambda can actually be safely removed from python and no other
features would be missing. It is always possible to create a def
version of any lambda, so lambda is useless. It is just a convenience
for the times where we're just too lazy to invent a name and find a
place to place the def, instead just inlining the function.


From amat at kabsi.at  Thu May 22 19:38:39 2008
From: amat at kabsi.at (Andreas Matthias)
Date: Fri, 23 May 2008 01:38:39 +0200
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
Message-ID: <vochg5-bo9.ln1@buckbeak.hogwarts>

inhahe at gmail.com wrote:

> actually i ddin't think about the fact that you're overloading dict, which 
> can already take multiple values in getitem

Oh, I didn't know that. I totally misinterpreted the error message.


> so how about
> 
> class crazy: pass
> 
> and then in your dict class:
> 
> def __getitem__(*args):

Apparently, args already is a tuple, so this should be:

  def __getitem__(self, args):

Is this documented somewhere? I couldn't find it anywhere.

Thanks.


Ciao
Andreas


From grante at visi.com  Mon May 12 13:48:51 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 12:48:51 -0500
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
Message-ID: <1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>

On 2008-05-12, Martin v. L?wis <martin at v.loewis.de> wrote:

> OTOH: do you plan to do any programming at all, in your
> life? If yes: consider using Python for every programming
> task you'll encounter - unless there are outside constraints
> demanding a different language. Python is flexible enough
> for *all* you programming needs (I claim);

Many, but not all.  Python doesn't work well on microprocessors
with a few thousand bytes of ROM and a few hundred bytes of
RAM.  Nor does it work well for writing device drivers for any
popular OS.

For windows/unix hosted user-space applications, Python is
pretty hard to beat.

-- 
Grant Edwards                   grante             Yow! I feel like I'm
                                  at               in a Toilet Bowl with a
                               visi.com            thumbtack in my forehead!!


From gagsl-py2 at yahoo.com.ar  Sat May 17 23:50:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 00:50:41 -0300
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>
	<2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>
	<d0bee883-f59a-4fc9-a17c-35c5d4ff6901@e53g2000hsa.googlegroups.com>
Message-ID: <op.ubbzmrn1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 17 May 2008 21:58:50 -0300, castironpi <castironpi at gmail.com> escribi?:

> I am still interested in this one, but doubt if anyone still reading.

I've not filtered you out *yet* - but that may happen very soon.

-- 
Gabriel Genellina



From krustymonkey at gmail.com  Sun May 11 19:21:47 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Sun, 11 May 2008 16:21:47 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
	<875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com>
Message-ID: <e1ba669d-f62d-42fb-811c-227351d030de@26g2000hsk.googlegroups.com>

On May 8, 7:29 pm, castiro... at gmail.com wrote:
> On May 8, 4:35 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
>
>
> > Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> > >> The thing is, I'm not using slots by choice.  I'm using the standard
> > >> lib "socket" class, which apparently uses slots.
>
> > > `socket` objects can't be pickled.  Not just because of the
> > > `__slot__`\s but because a substantial part of their state lives in
> > > the operating system's space.
>
> > Of course, if it makes sense to pickle sockets in the application, one
> > is can do so by defining __getstate__ and __setstate__:
>
> > class Connection(object):
> >     def __init__(self, host, port):
> >         self.host = host
> >         self.port = port
> >         self.init_sock()
>
> >     def init_sock(self):
> >         self.sock = socket.socket()
> >         self.sock.connect((host, port))
> >         ... init communication ...
>
> >     def __getstate__(self):
> >         # pickle self as a (host, port) pair
> >         return self.host, self.port
>
> >     def __setstate__(self, state):
> >         # reinstate self by setting host and port and
> >         # recreating the socket
> >         self.host, self.port = state
> >         self.init_sock()
>
> I, local, am mystified that you'd want to pickle a socket.  It's a
> live connection, which flies on a pocket dollar.  You don't want it on
> disk, do you?
>
> If you're running a net buoy through a cluster somewhere, do you want
> to drop a server and reconnect?  Is Amazon's EC2 up and running?
>
> Certainly no one was talking on the internet.  Were you?
>
> I don't think you hit anything but banks surfing the web, and the
> American dollar is notoriously stuffy.  Pump a wi-fi to a diner,
> though, and you're just talking more.  Where's Usenet?

The idea is a pre-fork socket server.  What I want to do is fork off
some child processes from the parent and use IPC to send the
connection object (via socket.accept()) over a pipe to one of the
preexisting child processes and have said child handle the
transaction.  Think Apache, if you want an example of what I'm trying
to do here.  This alleviates the process startup cost that occurs when
you fork.  If the socket object can't be serialized, is there another
way to go about handling this in python?


From shahmed at sfwmd.gov  Tue May 20 12:38:08 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Tue, 20 May 2008 12:38:08 -0400
Subject: Removing Space and "-" from a string
In-Reply-To: <93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com><mailman.1385.1211299351.12834.python-list@python.org>
	<93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20B0F17BF@EXCHVS01.ad.sfwmd.gov>

Thanks, works exactly what I needed.

-----Original Message-----
From: python-list-bounces+shahmed=sfwmd.gov at python.org
[mailto:python-list-bounces+shahmed=sfwmd.gov at python.org] On Behalf Of
s0suk3 at gmail.com
Sent: Tuesday, May 20, 2008 12:22 PM
To: python-list at python.org
Subject: Re: Removing Space and "-" from a string

On May 20, 11:02 am, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records
I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script
>
> Any help is highly appreciated.

string.replace('-', '').replace(' ', '')
--
http://mail.python.org/mailman/listinfo/python-list



From george.sakkis at gmail.com  Thu May  8 09:35:37 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 8 May 2008 06:35:37 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com> 
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
Message-ID: <3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>

On May 8, 2:58?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> George Sakkis wrote:
> > One of the few Python constructs that feels less elegant than
> > necessary to me is the del statement. For one thing, it is overloaded
> > to mean three different things:
> > (1) del x: Remove x from the current namespace
> > (2) del x[i]: Equivalent to x.__delitem__(i)
> > (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
>
> Note that the 'X = Y' construct has the corresponding three meanings:
>
> (1) x = 4 # Bind x to 4 in the 'current namespace'
> (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>
> What conclusion should we draw from that?

I think you're trying to imply that it is consistent with setting a
value (same with getting). I guess what bugs me about "del" is that
it's a keyword and not some universally well-known punctuation. Do you
you feel that Python misses a "pop" keyword and respective
expressions ?

(1) pop x: Remove x from the current namespace and return it.
(2) pop x[i]: Instead of x.pop(i)
(3) pop x.a: Equivalent to "_y=x.a; del x.a; return y"

George


From hdante at gmail.com  Fri May 16 10:25:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 07:25:15 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org> 
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com> 
	<695crbF303jk4U1@mid.uni-berlin.de>
Message-ID: <41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>

On May 16, 9:26?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > ?Did you consider gzipping your XML (or YAML) packets ? Would the
> > transfer time be acceptable in this case ?
>
> That would add even more to the overhead of transcoding the
> transportlayer. Switching from XMLRPC to a json-based protocol reduced

 Yes, that's why I suggested YAML.

> in a project of mine reduced the overhead 10-20fold - mainly because of
> reduced size and parsing efforts.

 I don't think so. It probably just the reduced size (check if the
json file is around 10 times smaller).

 I believe the server will be mostly I/O-bound, ie, most overhead will
be in the data link/physical layers. The compression/parsing time (a
few microseconds) should be a small fraction of the total transfer
time (a few milliseconds). Even if the service is not I/O bound,
(considering the Youtube example) if there's significant traffic in
the server, the database access time should be the most significant.

 I have used compression for SOAP messages in a GPRS (~20kbps) link
and got similar performance improvements (the web server was set to
automatically compress the data).

>
> Diez



From jon+usenet at unequivocal.co.uk  Thu May  1 12:11:29 2008
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: Thu, 01 May 2008 11:11:29 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
Message-ID: <slrng1jqth.ltk.jon+usenet@snowy.squish.net>

On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> IMO .ini-like config files are from the stone age. The modern approach is 
> to use YAML (http://www.yaml.org). 

You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
and so comprehensively and completely fails to achieve its stated
main goal of being "readable by humans", that I had assumed it
was an April Fool along the lines of Intercal or brainf***.

I certainly wouldn't recommend it as being suitable for, well,
anything at all.

Or were you trolling and I missed the joke? ;-)


From pavlovevidence at gmail.com  Fri May 30 05:15:47 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 30 May 2008 02:15:47 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <734f0e6a-ce91-45f8-a0f2-e3cd4faacf6c@c65g2000hsa.googlegroups.com>

On May 29, 12:07 pm, allendow... at gmail.com wrote:
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.


New style, all the way.

The drawback you speak of for new-style classes I think is today more
of a drawback for old-style.  The problem is, when a newbie goes
looking for examples, there is a lot of code out there that uses
things like properties, type(instance), @staticmethods, and so on.
Those won't work, and will confuse the hell out of newbies, if you
teach them old-style.  OTOH, the examples out there that are written
for old-style usually still work for new-style classes.

The only significant issue, as far as I'm concerned, is the list of
bases.  Which is why, even if you only cover new-style classes, it's
important to at least mention that there used to exist old-style that
don't list any bases (in Python 2.x).  And then tell the user, "We're
not covering it, it's not something you need to worry about, and most
of the time you can and should add (object) and the code will still
work."  And leave it at that--let the interested newbie seek out more
information on their own.


Carl Banks


From jacob at cd.chalmers.se  Sat May 24 12:32:35 2008
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Sat, 24 May 2008 16:32:35 +0000 (UTC)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <g19fv3$3vl$1@gide.ita.chalmers.se>

In article <mailman.1532.1211644302.12834.python-list at python.org>,
David  <wizzardx at gmail.com> wrote:
>> I work in small increments, writing one test at a time, then some code,
>> then another test, then some more code, etc.  In fact, I take this to what
>> many people might call an extreme.
>
>Thanks for the replies.
>
>I've read about the TDD (and similar) approaches. Maybe I need to try
>it and get used to it, but there are a few things I don't like about
>it on a gut level. I'll try to enumerate my concerns here.
>
>Problem 1: You can only code against tests
>
>Basically, with TDD you write the tests first, then the code which
>passes/fails the tests as appropriate. However, as you're writing the
>code you will also think of a lot of corner cases you should also
>handle. The natural way to do this is to add them to the code first.
>But with TDD you have to first write a test for the corner case, even
>if setting up test code for it is very complicated. So, you have these
>options:
>
>- Take as much time as needed to put a complicated test case in place.
>- Don't add corner case to your code because you can't (don't have
>time to) write a test for it.
>- Add the corner case handling to the code first, and try to add a
>test later if you have time for it.

As you come up with the corner case, write a test for it and leave the implementation
for later. The hard part of coding is always defining your problem. Once it is
defined (by a test) the solution is just a matter of tidy work.

>Problem 2: Slows down prototyping
>
>In order to get a new system working, it's nice to be able to throw
>together a set of modules quickly, and if that doesn't work, scrap it
>and try something else. There's a rule (forget where) that your first
>system will always be a prototype, regardless of intent.
>
>With TDD, you have to first write the tests for the first version.
>Then when that first version doesn't work out, you end up scrapping
>the tests and the code. The time spent writing the tests was wasted.
>

Agreed. There is no good way of reusing your prototype code in TDD. You end
up having to throw your propotype away in order to have a proper tested
implementation in the end. Takes more time up front, but less time over the
lifecycle of the program you are building.

>Problem 3: Slows down development in general
>
>Having to write tests for all code takes time. Instead of eg: 10 hours
>coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>writing all the tests, and 10 on the code.

This is incorrect. It speeds up development in general. The debugging phase of
development becomes much shorter because the bugs are fewer and the ones you
have a much shallower. There are so many tests that reduce the scope in which
you have to search for the bug that it usually becomes trivial to find.

I have direct experience from this, getting my company to change to TDD about
10 months ago. Productivity has improved enormously. I'd say that we have cut
between 25 and 50% in development time.

>Problem 4: Can make refactoring difficult.
>
>If you have very complete & detailed tests for your project, but one
>day you need to change the logic fundamentally (maybe change it from
>single-threaded to multi-threaded, or from running on 1 server to
>distributed), then you need to do a large amount of test refactoring
>also. The more tests you have (usually a good thing), the longer it
>will take to update all the tests, write new ones, etc. It's worse if
>you have to do all this first before you can start updating the code.

No, this is a total misunderstanding. It makes refactoring much easier.
It takes a bit of time to refactor the affected tests for the module, but you
gain so much by having tests that show that your refactoring is not breaking
code that should be unaffected that it saves the extra time spent many times
over.

Introducing bugs because you missed some aspect in a refactoring is one of the
most common problems in non-TDD code and it is a really nasty quality
concern.
>
>Problem 5: Tests are more important than code
>
>You need to justify the extra time spent on writing test code. Tests
>are nice, and good to have for code maintainability, but they aren't
>an essential feature (unless you're writing critical software for life
>support, etc). Clients, deadlines, etc require actual software, not
>tests for software (that couldn't be completed on time because you
>spent too much time writing tests first ;-)).
>
The tests are as important as the code. As a customer, I don't think I'd buy
software today unless I know that it has been built using TDD. Certainly I am
ahead of the curve in this, but it won't be long before this will be required
by skilled organisations buying software and sooner or later the rest of the
world will follow.

Getting into a TDD mindset is hard work, but those who succeed produce better
software with less effort.

Jacob Hall??n

-- 


From mrkafk at gmail.com  Sat May  3 16:50:10 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 13:50:10 -0700 (PDT)
Subject: Daily WTF with XML, or error handling in SAX
Message-ID: <ab018c7e-7ad6-4ea2-bbc0-57140e804e28@25g2000hsx.googlegroups.com>


So I set out to learn handling three-letter-acronym files in Python,
and SAX worked nicely until I encountered badly formed XMLs, like with
bad characters in it (well Unicode supposed to handle it all but
apparently doesn't), using http://dchublist.com/hublist.xml.bz2 as
example data, with goal to extract Users and Address properties where
number of Users is greater than given number.

So I extended my First XML Example with an error handler:

# ========= snip ===========
from xml.sax import make_parser
from xml.sax.handler import ContentHandler
from xml.sax.handler import ErrorHandler

class HubHandler(ContentHandler):
    def __init__(self, hublist):
        self.Address = ''
        self.Users = ''
        hl = hublist
    def startElement(self, name, attrs):
        self.Address = attrs.get('Address',"")
        self.Users = attrs.get('Users', "")
    def endElement(self, name):
        if name == "Hub" and int(self.Users) > 2000:
            #print self.Address, self.Users
            hl.append({self.Address: int(self.Users)})

class HubErrorHandler(ErrorHandler):
    def __init__(self):
        pass
    def error(self, exception):
        import sys
        print "Error, exception: %s\n" % exception
    def fatalError(self, exception):
        print "Fatal Error, exception: %s\n" % exception

hl = []

parser = make_parser()

hHandler = HubHandler(hl)
errHandler = HubErrorHandler()

parser.setContentHandler(hHandler)
parser.setErrorHandler(errHandler)

fh = file('hublist.xml')
parser.parse(fh)

def compare(x,y):
    if x.values()[0] > y.values()[0]:
        return 1
    elif x.values()[0] < y.values()[0]:
        return -1
    return 0

hl.sort(cmp=compare, reverse=True)

for h in hl:
    print h.keys()[0], "   ", h.values()[0]
# ========= snip ===========

And then BAM, Pythonwin has hit me:


>>> execfile('ph.py')
Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)


>>> ================================ RESTART ================================

Just before the "RESTART" line, Windows has announced it killed
pythonw.exe process (I suppose it was a child process).

WTF is happening here? Wasn't fatalError method in the HubErrorHandler
supposed to handle the invalid tokens? And why is the message repeated
many times? My method is called apparently, but something in SAX goes
awry and the interpreter crashes.




From neerashish at gmail.com  Thu May  8 13:58:45 2008
From: neerashish at gmail.com (neerashish)
Date: Thu, 8 May 2008 10:58:45 -0700 (PDT)
Subject: Python Syntax and misspelled variable and method name checker?
Message-ID: <17130132.post@talk.nabble.com>



Is there a good Python Syntax and mis-spelled variable and method name
checker available.

I have been programming in python for last 6 months and misspelled variables
and method names have been bane of my python life. 

In complied languages, compiler checks for these mistakes. I come from Java
, C++ background. 

I use komodo as editor on mac. I use python 2.4

Please suggest some good tool and utilities.

thanks
Ashish
-- 
View this message in context: http://www.nabble.com/Python-Syntax-and-misspelled-variable-and-method-name-checker--tp17130132p17130132.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From deets at nospam.web.de  Mon May  5 07:47:18 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 13:47:18 +0200
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
Message-ID: <688af0F2pc3jjU1@mid.uni-berlin.de>

globalrev wrote:

> http://www.pygame.org/docs/ref/mixer.html
> 
> import pygame
> 
> #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> buffer=3072)  //it complained abiout words=
> so i guess its only the nbrs should be there//
> 
> pygame.mixer.init(22050, -16, 2, 3072)
> pygame.mixer.music.load("example1.mp3")
> pygame.mixer.music.play(loops=1, start=0.0)
> 
> 
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> <module>
>     pygame.mixer.music.load("example1.mp3")
> error: Couldn't read from 'example1.mp3'

Give it the full path to the MP3. Be aware of backward slashes + the need to
escape them.

Diez


From gagsl-py2 at yahoo.com.ar  Sat May 10 23:46:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 00:46:18 -0300
Subject: Free Memory
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
Message-ID: <op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 12:44:21 -0300, Patrick Mullen <saluk64007 at gmail.com> escribi?:

> I had some very interesting results with this code to do what is asked:
>
> for key in globals().keys():
>     del globals()[key]
> for key in locals().keys():
>     del locals()[key]

Removing items from locals() has no effect, at least on CPython. Local variables doesn't "live" on that dictionary, locals() is built on demand when required.
At module level, locals and globals are the same thing.

py> def foo():
...   x = 1
...   y = "hello"
...   print locals()
...   for key in locals().keys():
...     print "deleting", key
...     del locals()[key]
...   print locals()
...   print x, y
...
py> foo()
{'y': 'hello', 'x': 1}
deleting y
deleting x
{'y': 'hello', 'x': 1, 'key': 'x'}
1 hello

BTW, if you want to clear a dictionary, just use its clear() method. So a more compact form of your code would be: globals.clear().
Anyway I don't see why do you want to keep an empty module around - just remove it from sys.modules, and if nobody else holds a reference to it, it will be destroyed.

> It might be better to reverse the two steps, I didn't give it much thought.
> Anyway, when this is done, all of the builtins spill into globals and locals
> (since __builtin__ was deleted).  I thought that was interesting.

Sorry I don't understand you...

> It did have the effect that is asked for, although there may be more
> unintended consequences.  Also if any objects are attached to any of the
> builtins I expect they will still be around.

Your code removes all direct references to objects from the current module, it does not free memory "per se". There may be other references elsewhere. Objects are deleted (and memory freed) only when their reference count reaches zero.

-- 
Gabriel Genellina



From slesarev.anton at gmail.com  Tue May  6 15:42:26 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Tue, 6 May 2008 12:42:26 -0700 (PDT)
Subject: python vs. grep
Message-ID: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>

I've read great paper about generators:
http://www.dabeaz.com/generators/index.html

Author say that it's easy to write analog of common linux tools such
as awk,grep etc. He say that performance could be even better.

But I have some problem with writing performance grep analog.


It's my script:

import re
pat = re.compile("sometext")

f = open("bigfile",'r')

flines = (line for line in f if pat.search(line))
c=0
for x in flines:
    c+=1
print c

and bash:
grep "sometext" bigfile | wc -l

Python code 3-4 times slower on windows. And as I remember on linux
the same situation...

Buffering in open even increase time.

Is it possible to increase file reading performance?


From torriem at gmail.com  Mon May 12 08:54:35 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 12 May 2008 06:54:35 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>
Message-ID: <48283E0B.4060001@gmail.com>

Larry Hale wrote:
> Alternately, if one wishes to leave/place the magic files elsewhere,
> do like:
> 
>     >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
> \share\\file\\magic' ) # <-- spec where/what the file is
> 
> NOTE: Even if the "magic_file" location *is* specified, "mime = True"
> still works fine.  (Haven't checked, but I presume the source simply
> tacks ".mime" to the filename automagically.)  Obviously/also, one
> needn't specify the argument names if one uses proper argument order:
> magic.Magic( mime, magic_file )  :)
> 
> 
> THANKS SO MUCH, Michael, for your answers and helping me alone the
> way...  :)

Glad it's working for you.


From terry.yinzhe at gmail.com  Sat May 10 19:39:56 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sat, 10 May 2008 16:39:56 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
Message-ID: <7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>

On May 11, 7:22 am, frankdmarti... at gmail.com wrote:
> Class A inherits from class B.  Can anyone point me in the direction
> of documentation saying how to initialize an object of A, a1, with an
> object of B, b1?

This is called a 'factory'in design patterns. Search 'python factory',
you will get a lot of examples.

br, Terry


From zerty.david at gmail.com  Sun May 11 20:15:25 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sun, 11 May 2008 21:15:25 -0300
Subject: how to separate words from a string?
Message-ID: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>

Hi, how can I separate words from a sentence in a string? Like the
java.String.split method
I need something that gets an string "This is a sentence", and return to em
a list["This","is","a","sentence"]
Can anyone help?
Thx
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From pierre.gronlier at gmail.com  Fri May 23 04:04:28 2008
From: pierre.gronlier at gmail.com (ticapix)
Date: Fri, 23 May 2008 01:04:28 -0700 (PDT)
Subject: webcam (usb) access under Ubuntu
References: <cdd59c49-8bf3-496b-8b08-6e901572c85c@q27g2000prf.googlegroups.com>
	<66jlk1F2ju6c8U1@mid.uni-berlin.de>
	<b588790c-1c32-4e64-9690-fa42c69548a2@n1g2000prb.googlegroups.com>
	<66kkedF2l526dU2@mid.uni-berlin.de>
	<455760fb-8229-4be3-ba7f-7c41bdcd66de@a22g2000hsc.googlegroups.com>
	<362eb242-2adc-4d7b-9c0a-95e72f4b22b6@e67g2000hsa.googlegroups.com>
Message-ID: <6a228393-1b14-4c4e-9a39-b15a77270994@a1g2000hsb.googlegroups.com>

On 16 avr, 09:41, Berco Beute <cybe... at gmail.com> wrote:
> On Apr 15, 11:45 pm, Berco Beute <cybe... at gmail.com> wrote:
>
> > I've tried reinstalling gstreamer (for windows):
>
> >http://gstreamer.freedesktop.org/pkg/windows/releases/gstreamer/gstre......
>
> > but that didn't help. I get some complaints about 'libgstinterfaces'
> > as well...
>
> To be more precise, when doing an 'import gst' Python shell pops up an
> error dialog saying:
>
> "This application has failed to start because
> libgstinterfaces-0.10.dll was not found."
>
> 2B

You need to install gst-plugins-good too

--
pierre


From Scott.Daniels at Acm.Org  Wed May 21 23:07:25 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 21 May 2008 20:07:25 -0700
Subject: about python modules
In-Reply-To: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <e6OdnQob8PrBfKnVnZ2dnUVZ_sWdnZ2d@pdx.net>

srinivas wrote:
> ... i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
> 
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
> 
> pls help me friends how to do that.

An unmentioned possibility:
Create a file named "whatever.pth" (where the "whatever" is your
choice).  The contents of this file should be a line containing the
path to your directory (in your case a single line containing
"D:\programs\Functions" (w/o the quotes).
Put this file in your site-packages file (for windows in your case,
that is C:\Python25\Lib\site-packages


--Scott David Daniels
Scott.Daniels at Acm.Org


From benkasminbullock at gmail.com  Mon May 19 23:00:03 2008
From: benkasminbullock at gmail.com (Ben Bullock)
Date: Tue, 20 May 2008 03:00:03 +0000 (UTC)
Subject: pop langs website ranking
References: <41fbaf27-a80b-402b-b406-c048a65a8643@b64g2000hsa.googlegroups.com>
Message-ID: <g0terj$1i7$2@ml.accsnet.ne.jp>

In comp.lang.perl.misc xahlee at gmail.com <xahlee at gmail.com> wrote:
> In February, i spent few hours researching the popularity of some
> computer language websites.

One way to do such research is for you to publish the actual number of
hits on your website. It's also easy to analyze logfile data with free
tools like analog or awstats, and publish the number of unique
visitors, pages hit, bandwidth, etc. It would also be possible for you
to work out how accurate the Alexa numbers actually are compared to
the numbers you see in your logs.


From john106henry at hotmail.com  Tue May 13 18:22:44 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 15:22:44 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<mailman.1074.1210711800.12834.python-list@python.org>
Message-ID: <7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>

On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
> John Henry wrote:
> > Hi list,
>
> > I can't understand this.  The following import statement works fine:
>
> >     from PythonCard.templates.dialogs import runOptionsDialog
>
> > but this one fails:
>
> >     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> This kind of "dotted" name import only works for packages, and a
> directory is considered a package only if it contains a file name
> __init__.py.    Looking around my installation of PythonCard (on Linux)
> I see that most of those directories *do NOT* have a __init__.py, so
> they are not packages and cannot be imported that way.
>
> Of course this leaves unanswered the question of *how* you are supposed
> to import that code.   I've never used PythonCard so I can't help
> further, but I suggest looking at the documentation and examples
> supplied.  And perhaps waiting for someone with experience with
> PythonCard to answer.
>
> Gary Herron
>
> P.S. It is usually a waste of time to tell us that something fails
> without telling us *how* it fails.  (Cut and paste the error message
> always, and the traceback usually.)  If you don't, you will usually get
> a request to supply that information, and then have wast3ed the time for
> one full round of message to the group.  Even in this case, I'm only
> guessing how it failed for you.
>
> > I've checked and rechecked to make sure that the spellings are proper
> > and that the tools, the codeEditor directory, and codeEditor.py, and
> > the class CodeEditor all exists and yet idle keep complaining that it
> > can't import from PythonCard.tools.
>
> > What's going on?  (Running Python2.5 under WinXP).
>
> > Regards,
> > --
> >http://mail.python.org/mailman/listinfo/python-list

Thank you very much.  I didn't know about the __init__.py
requirement.  Appreciate it.


From matthieu.brucher at gmail.com  Tue May 13 14:05:14 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Tue, 13 May 2008 20:05:14 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805131105g3176a9c3qdad1ec30d5114b7d@mail.gmail.com>

So does every other compiler like gcc or interpreters like Python. What is
your point ?

Matthieu

2008/5/13 Dave Parker <daveparker at flamingthunder.com>:

> >  Notice that I said "free software", not "*** FREE *** software !!!!
> > 1!" (that is, free as in freedom, not free as in beer). Read again my
> > answer, considering this.
>
> I misread your meaning.  In a sense, Flaming Thunder is even more free
> than "free software".  Flaming Thunder doesn't place any restrictions
> on how you use your source code or the executables you create.  There
> is no GNU license that you need to worry about.
>
> On May 13, 11:06 am, hdante <hda... at gmail.com> wrote:
> > On May 13, 12:24 pm, Dave Parker <davepar... at flamingthunder.com>
> > wrote:
> >
> >
> >
> >
> >
> > > >  The "Flaming Thunder" looks promising, but without being free
> > > > software, it's unlikely it will create a large developer community,
> > > > specially considering both free general purpose and scientific
> > > > programming languages.
> >
> > > Perhaps.  Flaming Thunder is only $19.95 per year for an individual
> > > (and even less per individual for site licenses), which is less than
> > > the cost of just one book on Python.
> >
> > > I think that many people will find that Flaming Thunder is easier to
> > > use and understand than Python -- so for many people the amount of
> > > time they save will be worth more than the cost of Flaming Thunder
> > > (unless, of course, their time is worth $0).
> >
> > > Also, several users have rewritten their Python programs in Flaming
> > > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > > (Flaming Thunder compiles to native executables).  So again, since
> > > many people value their time at more than $0, I think that many people
> > > will find that Flaming Thunder is worth $19.95 per year.
> >
> > > Plus, me getting paid to work on Flaming Thunder is far more
> > > motivating than me not getting paid to work on Python.  This weekend,
> > > Python users will still be debating how to fix awkwardnesses in the
> > > languages (such as FOR loops where you're just counting the loops and
> > > not referencing the loop variable) -- but Flaming Thunder users will
> > > be getting work done using the REPEAT n TIMES constructs that I'll be
> > > implementing.
> >
> > > Python has been around about 15 years, yet still has those
> > > awkwardnesses.  Flaming Thunder has been out less than 6 months and
> > > those awkwardnesses are already getting fixed.  The difference: I
> > > can't afford to ignore users.
> >
> > > But the future is one of the hardest things to predict, so we'll see.
> >
> > > On May 13, 8:34 am, hdante <hda... at gmail.com> wrote:
> >
> > > > On May 13, 10:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> >
> > > > > On May 13, 8:32 am, Dave Parker <davepar... at flamingthunder.com>
> wrote:
> >
> > > > > > > Don't let yourself be irritated by castironpi
> >
> > > > > > I'm not the sort to get irritated by anyone.  There is value in
> all
> > > > > > interaction.
> >
> > > > > Not this interaction, I'm afraid.  What irritates *me* about
> > > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > > here.  If you go back to his postings from a year ago (and selected
> > > > > ones since), his comments are coherent and sensible.  These
> rambling
> > > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > > his idea of a joke.  But they are certainly not worth your time in
> > > > > trying to respond to them.
> >
> > > > > -- Paul
> >
> > > >  I don't think castironpi so annoying that I should filter its
> > > > messages. It would be enough if he were better tuned. He is much
> > > > smarter than the emacs shrink, for example. :-P
> >
> > > >  The "Flaming Thunder" looks promising, but without being free
> > > > software, it's unlikely it will create a large developer community,
> > > > specially considering both free general purpose and scientific
> > > > programming languages.- Hide quoted text -
> >
> > > > - Show quoted text -
> >
> >  Notice that I said "free software", not "*** FREE *** software !!!!
> > 1!" (that is, free as in freedom, not free as in beer). Read again my
> > answer, considering this.- Hide quoted text -
> >
> > - Show quoted text -
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From castironpi at gmail.com  Fri May  9 21:55:44 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 18:55:44 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org> 
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com> 
	<mailman.893.1210380967.12834.python-list@python.org>
Message-ID: <bcd03b34-f26f-472a-bbf8-b4a42c8cae1e@y38g2000hsy.googlegroups.com>

On May 9, 7:55?pm, St?phane Larouche <stephane.larou... at polymtl.ca>
wrote:
> > On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> > > On behalf of the Python development team and the Python community, I
> > > am happy to announce the third alpha release of Python 2.6, and the
> > > fifth alpha release of Python 3.0.
>
> After I installer Python 2.6a3, Matlab R2007a began having problems. When I
> start Matlab, it shows a window indicating that it is installing Microsoft
> Visual C++ 2005 Redistributable, which fails, and then Matlab closes. This
> problem did not happen with Python 2.6a2 and removing Python 2.6a3 solves the
> problem.
>
> Is anybody else having the same problem? Do you know what causes it? Is there a
> workaround?

That one might be a true, "Don't stampede the Python."  Numbers have
been known grow.  (...not that the numbers do.)  Bread and butter, new
butter.


From http  Sun May 11 22:37:06 2008
From: http (Paul Rubin)
Date: 11 May 2008 19:37:06 -0700
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <7xmymwuu25.fsf@ruckus.brouhaha.com>

Yves Dorfsman <yves at zioup.com> writes:
> import time
> y, None, d, None, None, None, None = time.localtime()
> 
> I know you can't assign anything to None, but I'm sure you get what I
> mean, a special keyword that means I don't care about this value.

You can just use a variable name than you ignore.  It's traditional to
use _ but it's not a special keyword, it's just a another variable name:

   y, _, d, _, _, _, _, _, _ = time.localtime()


From lists at cheimes.de  Fri May  9 05:36:01 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 11:36:01 +0200
Subject: RELEASED Python 2.6a3 and 3.0a5
In-Reply-To: <26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
References: <mailman.820.1210290618.12834.python-list@python.org>
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
Message-ID: <48241B01.8050009@cheimes.de>

Kay Schluehr schrieb:
> http://www.python.org/ftp/python/3.0/python-3.0a5.msi

> Error 404: File Not Found

> http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi

> Error 404: File Not Found

The Windows binaries usually take a while. I'm adding Martin to the CC
list. His is most like building the files today.

Christian




From deets at nospam.web.de  Thu May 29 06:03:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 12:03:00 +0200
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<613388153.20080528051020@freemail.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
Message-ID: <6a7dblF35fm1rU1@mid.uni-berlin.de>

> A good OO programmer could easily write good functional code.

You are aware that functional programming is *not* procedural or imperative
programming? 

http://en.wikipedia.org/wiki/Functional_programming

OO is *heavily* depending on state and state modification. I've seen OO
programmers weep over functional programming assignments. Which is not to
say that FP is in any sense bad - au contraire, knowing it is important
because it is a different school of thought that's very valuable to know
of. And Python allows for many of the FP concepts to be used. See map,
filter and other HOFs.

Diez


From gagsl-py2 at yahoo.com.ar  Sat May 24 23:52:50 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 00:52:50 -0300
Subject: Google Treasure solution in python - first time python user,
	help whats wrong
References: <44de619e-14f3-49d2-b336-a14e5dca12cd@e39g2000hsf.googlegroups.com>
Message-ID: <op.uboyecr2x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 05:40:26 -0300, x40 <marko.srepfler at gmail.com> escribi?:

> I try to learn python thru solving some interisting problem, found
> google trasure hunt,
> write first program ( but cant find whats wrong).

And what happens? You don't get the expected result? The program aborts with an exception? Or what?

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Sun May 18 06:09:57 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 18 May 2008 10:09:57 +0000 (UTC)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<482FF39A.5010604@v.loewis.de>
Message-ID: <g0ov9k$b3e$1@news.mtu.ru>

On Sun, 18 May 2008 11:15:06 +0200, Martin v. L?wis wrote:

> There is also the issue of aliases. Some call it Moscow, some Moskau,
> when it is really called ??????. Of course, the same issue exists for
> states: some call it Kalifornien, others California.

I don't see any issues here. Everybody call it "Moscow" when they speak
English and "??????" when they speak Russian. Calling it "??????" or
"Moskva" in English would be simply not correct and confusing.

-- Ivan



From sturlamolden at yahoo.no  Sun May 18 08:20:09 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 05:20:09 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<7ENXj.6906$255.106@bignews8.bellsouth.net>
Message-ID: <71dc01f3-0084-4878-a4f0-5792e2648f77@y21g2000hsf.googlegroups.com>

On May 18, 5:46 am, "inhahe" <inh... at gmail.com> wrote:

> The numbers I heard are that Python is 10-100 times slower than C.

Only true if you use Python as if it was a dialect of Visual Basic. If
you use the right tool, like NumPy, Python can be fast enough. Also
note that Python is not slower than any other language (including C)
if the code is i/o bound. As it turns out, most code is i/o bound,
even many scientific programs.

In scientific research, CPU time is cheap and time spent programming
is expensive. Instead of optimizing code that runs too slowly, it is
often less expensive to use fancier hardware, like parallell
computers. For Python, we e.g. have mpi4py which gives us access to
MPI. It can be a good advice to write scientific software
parallelizable from the start.

I learned Pascal my first year in college. When I started programming
Matlab, I brought with me every habits of a novice Pascal programmer.
Needless to say, my programs ran excruciatingly slow. I learned C just
to write faster "mex" extensions for Matlab. But eventually, my skills
improved and I found that my Matlab programs did not need C anymore.
It took me almost 3 years to unlearn the bad habits I had acquired
while programming Pascal. It is very easy to blame the language, when
in fact it is the programmer who is not using it properly.


















From chandran.ramu1 at gmail.com  Mon May 12 02:16:24 2008
From: chandran.ramu1 at gmail.com (chandran.ramu1 at gmail.com)
Date: Sun, 11 May 2008 23:16:24 -0700 (PDT)
Subject: hai friends
Message-ID: <c7e1096b-80d6-4799-9646-57cf2c89af4c@x19g2000prg.googlegroups.com>

hai dear,
"may all good things come into your life today and always"
www.goodhistory5.blogspot.com


From Tymoteusz.Jankowski at gmail.com  Fri May  9 05:13:34 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Fri, 9 May 2008 02:13:34 -0700 (PDT)
Subject: the lvalue curse? let's play with this crazy idea ;)
Message-ID: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>

I started playing with Python and love it since the very beginning,
programming using Python is so ...human-like? but one thing returns to
me almost everytime when I see/write the code


Let's take a look at two ways of thinking...
the standard one which is well-known and loved by almost everyone :)
and that crazy concept below which suprised evan me :wacko:

<code>
import time

ftime = time.time()
localtime = time.localtime(ftime)
localtime = list(localtime[:3])
localtime = [str(i) for i in localtime]
print '-'.join(localtime)
</code>

It's harder to read than the below concept, isn't?
Maybe I didn't used to this way of thinking yet. I hope it'll change
soon or i'll quit ;)


<almost code>
time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
-> '-'.join()
</almost code>

My example conclusion and not-ansewered-yet question...
-it's nice to read and choosing the good names to variables aren't so
important
-what is the purpose of the variables here? :)

I realize that there is no chance to implement it, but I really want
to share it :]

Peace,
T.

PS
forgive my my english
[shall I set it as a signature? ;) ]


From grahamjfeeley at optusnet.com.au  Thu May 29 04:23:03 2008
From: grahamjfeeley at optusnet.com.au (Graham Feeley)
Date: Thu, 29 May 2008 18:23:03 +1000
Subject: run a script in vista
Message-ID: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>

Hi, I have a script which runs in xp, however now I have upgraded to vista 
this script now does'nt work
Can someone help with this problem please ?
this is the start of the script

import cPAMIE
import cModalPopUp
import winGuiAuto as wga
import time, datetime
import os, sys, re
import mx.ODBC.Windows as odbc

appreciate any help  here
Regards
Graham



From gherron at islandtraining.com  Wed May 21 11:43:31 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 21 May 2008 08:43:31 -0700
Subject: getting dir(x), but not as list of strings?
In-Reply-To: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <48344323.1040401@islandtraining.com>

mh at pixar.com wrote:
> I want to iterate over members of a module, something like:
>
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
>
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?
>
> Many TIA!
> Mark
>
>   
Use the builtin vars to get a dictionary of names and associated objects. 

import sys
for name,ob in vars(sys).items():
  print name,type(ob)

Gary Herron



setrecursionlimit <type 'builtin_function_or_method'>
getfilesystemencoding <type 'builtin_function_or_method'>
path_importer_cache <type 'dict'>
stdout <type 'file'>
version_info <type 'tuple'>
exc_clear <type 'builtin_function_or_method'>
prefix <type 'str'>
getrefcount <type 'builtin_function_or_method'>
byteorder <type 'str'>
...



From wollez at gmx.net  Wed May  7 11:51:56 2008
From: wollez at gmx.net (WolfgangZ)
Date: Wed, 07 May 2008 17:51:56 +0200
Subject: What is the purpose of ptyhon in Windows
In-Reply-To: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <fvsj6s$n87$1@ger.gmane.org>

parag_paul at hotmail.com schrieb:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
> 
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
At least I'm living in a free country and nobody forces me to learn 
python. So I don't fully understand why you HAVE TO learn it. When your 
problems can be solved in a different programming language than you 
should be free to use whatever you like. And also why should it be 
forbidden to create a new programming language? Diversity and 
competition is usually not bad.



From garrickp at gmail.com  Tue May 20 14:48:46 2008
From: garrickp at gmail.com (Falcolas)
Date: Tue, 20 May 2008 11:48:46 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <34393ad5-59d1-4772-92c3-7e4d44a643c2@w4g2000prd.googlegroups.com>

On May 20, 12:34 pm, notnorweg... at yahoo.se wrote:

> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

To simply bypass the first line, do a readline() on the file object
before starting to process the file. To filter out particular lines
throughout the file, you can either do a check in the for loop and
continue if it is true, or create a generator which filters out
unwanted content.

untested:

fd = open(some_file)
fi = (x for x in fd if (x.search(':') < 0))
for line in fi:
    pass

It gets a bit more complicated if you want to actually split on
sentences, not lines.


From aspersieman at gmail.com  Thu May  8 08:24:37 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:24:37 +0200
Subject: POP connection timeout.
Message-ID: <4822F105.5050505@gmail.com>

Hi All

I have written an application that queries a POP mailbox and 
downloads messages. When the application tries to connect to the mail 
server, but takes too long (eg. longer than 60 seconds) I want to have 
it time out.

Something like

try:
   pop = poplib.POP3(POPHOST, POPPORT)
except someerror, err:
   print "Connecting to mail box has timed out:\n", err

I know that in python 2.5 I could pass an additional timeout parameter 
to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
TIMEOUTINSECONDS), but I am using python 2.4.

Can anyone help me implement this timeout functionality.

Regards

Nicol
-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 





-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From arnodel at googlemail.com  Thu May  8 05:22:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 8 May 2008 02:22:01 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com> 
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<Xns9A985A46AEA62duncanbooth@127.0.0.1>
Message-ID: <ce2982c0-755f-4d89-8f5c-9c32384ae05e@y38g2000hsy.googlegroups.com>



Duncan Booth wrote:
> Arnaud Delobelle <arnodel at googlemail.com> wrote:
>
> >
> >
> > George Sakkis wrote:
> >> One of the few Python constructs that feels less elegant than
> >> necessary to me is the del statement. For one thing, it is overloaded
> >> to mean three different things:
> >> (1) del x: Remove x from the current namespace
> >> (2) del x[i]: Equivalent to x.__delitem__(i)
> >> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
> >
> > Note that the 'X = Y' construct has the corresponding three meanings:
> >
> > (1) x = 4 # Bind x to 4 in the 'current namespace'
> > (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> > (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>
> I think you both missed a case:
>
>   (1b) global x; del x    # Remove x from global namespace
>   (1b) global x; x = 4    # Bind x to 4 in the global namespace

This is why you put 'current namespace' in quotes!  But all three of
us missed the case:

(1-3000) What about nonlocal?

> That Python is simple and consistent.

Seems reasonable to me.

--
Arnaud


From goldnery at gmail.com  Sat May 31 17:38:29 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 31 May 2008 14:38:29 -0700 (PDT)
Subject: Need Tutorial For the following lib
Message-ID: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>

Hi every one. I need comprehensive tutorial for the following
library :

1. pyWinAuto
2. winGuiAuto



Thanks in advance


From kyosohma at gmail.com  Fri May  2 09:32:56 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 06:32:56 -0700 (PDT)
Subject: Python documentation
References: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
Message-ID: <2713f3f1-55e0-42a7-94eb-e0bea505ce60@m45g2000hsb.googlegroups.com>

On May 2, 4:34 am, ad... at remembernobody.com wrote:
> Hello,
>
> I have been learning python for some time using the dive into python
> book. I am interested to know if anyone can recommend a book which
> covers more advanced topics like threading and potentially GUI style
> coding.
>
> Regards,
>
> Ronald

Lutz's book, "Programming Python" covers a lot of advanced topics,
including building various GUI-oriented programs with Tkinter. There's
also "Core Python Programming" by Chun, which has some good internals
stuff in it.

I prefer using wxPython for my GUI work, so I'll also recommend Robin
Dunn's "wxPython in Action".

Mike


From Sam.Dutton at itn.co.uk  Thu May 22 12:32:13 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Thu, 22 May 2008 17:32:13 +0100
Subject: Why is math.pi slightly wrong?
Message-ID: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>

I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
 
Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
 
I searched for this on the web and in this group and couldn't find anything -- but humble apologies if this has been asked before/elsewhere.
 
Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
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Thank You.


From gnewsg at gmail.com  Tue May 13 17:05:43 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 14:05:43 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1072.1210709797.12834.python-list@python.org>
Message-ID: <2567d557-b5cd-4b12-ad09-67f30ce1078d@b1g2000hsg.googlegroups.com>

On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
> >> We do not live in a pure world, Python isn't pure (practicality beats
> >> purity), and by attempting to send some data each time a .push*()
> >> method is called, there are measurable increases in transfer rates.
>
> >Good point. I'd like to ask a question: if we'd have a default
> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
> >such problem?
> >I've always found weird that asyncore has such an high default timeout
> >value.
> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>
> I'm not sure this is right. ?What timeout are we talking about? ?Twisted
> only wakes up when necessary.
>
> Jean-Paul

I'm talking about the asyncore.loop timeout parameter which defaults
to 30 (seconds).
I don't think that Twisted only wakes up when necessary (surely not by
using the select reactor).
Think about the schedule calls feature (reactor.callLater).
To have that work I guess that a continuous loop must always be kept
alive, regardless of the reactor used.

--- Giampaolo
http://code.google.com/p/pyftpdlib


From squareswallower at 1ya2hoo3.net  Fri May  9 23:19:19 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Fri, 9 May 2008 21:19:19 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com>
Message-ID: <g0347n$404$1@news.xmission.com>

On 2008-05-09 18:53:19 -0600, George Sakkis <george.sakkis at gmail.com> said:

> On May 9, 5:19?pm, umpsu... at gmail.com wrote:
>>>> What would be the best method to print the top results, the one's that
> 
>>>> had the highest amount of anagrams?? ?Create a new histogram dict?
>> 
>>> You can use the max() function to find the biggest list of anagrams:
>> 
>>> top_results = max(anagrams.itervalues(), key=len)
>> 
>>> --
>>> Arnaud
>> 
>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>> lists? ?Is there a way to specific top three w/ a max command??
> 
>>>> import heapq
>>>> help(heapq.nlargest)
> Help on function nlargest in module heapq:
> 
> nlargest(n, iterable, key=None)
>     Find the n largest elements in a dataset.
> 
>     Equivalent to:  sorted(iterable, key=key, reverse=True)[:n]
> 
> 
> HTH,
> George

I both the 'nlargest' and the 'sorted' methods.. I could only get the 
sorted to work.. however it would only return values like (3,  edam) 
not the list of words..

Here is what I have now.. Am I over-analyzing this?  It doesn't seem 
like it should be this hard to get the program to print the largest set 
of anagrams first...


def anafind():
	fin = open('text.txt')
	mapdic = {}
	finalres = []			# top answers go here
	for line in fin:
		line = line.strip()
		alphaword = ''.join(sorted(line))	#sorted word as key
		if alphaword not in mapdic:
			mapdic[alphaword] = [line]
		else:
			mapdic[alphaword].append(line)
	topans = sorted((len(mapdic[key]), key) for key in mapdic.keys())[-3:] 
  #top 3 answers
	for key, value in topans: 	#
		finalres.append(mapdic[value])
	print finalres



From mnikhil at gmail.com  Tue May 13 19:57:07 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 05:27:07 +0530
Subject: list.__len__() or len(list)
Message-ID: <g0d9sj$m58$1@registered.motzarella.org>

which one is better? and why?

__len__() is a built-in function of the list object and is updated along 
with the list object elements and will be useful incase the list is very 
huge.

len() is an external method again, which may require the processing 
cycles again.

Is it right?


From conradwt at gmail.com  Mon May 26 10:09:27 2008
From: conradwt at gmail.com (Con)
Date: Mon, 26 May 2008 07:09:27 -0700 (PDT)
Subject: Cannot Read MySQLdb docs within Python interpreter
Message-ID: <a5c7717d-22aa-40bc-981d-76766eb43d32@u12g2000prd.googlegroups.com>

Hi, I'm gettting a traceback when I attempt to read the MySQLdb docs
after installation on Mac OS X 10.5.2:

BEGIN TRACEBACK:

>>> help( "MySQLdb" )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/site.py", line 346, in __call__
    return pydoc.help(*args, **kwds)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1645, in __call__
    self.help(request)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1687, in help
    elif request: doc(request, 'Help on %s:')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1481, in doc
    pager(title % desc + '\n\n' + text.document(object, name))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 324, in document
    if inspect.ismodule(object): return self.docmodule(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1072, in docmodule
    contents.append(self.document(value, key, name))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 325, in document
    if inspect.isclass(object): return self.docclass(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1196, in docclass
    lambda t: t[1] == 'method')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1146, in spill
    name, mod, object))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 326, in document
    if inspect.isroutine(object): return self.docroutine(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1257, in docroutine
    doc = getdoc(object) or ''
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 82, in getdoc
    result = inspect.getdoc(object) or inspect.getcomments(object)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/inspect.py", line 521, in getcomments
    lines, lnum = findsource(object)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/inspect.py", line 510, in findsource
    if pat.match(lines[lnum]): break
IndexError: list index out of range

END TRACEBACK:

If anyone has any ideas as to how to resolve this issue, please feel
free to post the solution and thanks in advance.

-Conrad




From Scott.Daniels at Acm.Org  Sun May  4 19:41:34 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 04 May 2008 16:41:34 -0700
Subject: Please help - Tkinter not doing anything
In-Reply-To: <e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
Message-ID: <qrOdnX_7Y_Mi2oPVnZ2dnUVZ_u2dnZ2d@pdx.net>

s0suk3 at gmail.com wrote:
> On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>> .... I'm pasting the code in IDLE and using Windows XP....
> 
> Tkinter doesn't work if you type the statements in IDLE.... it doesn't 
 > work because IDLE is itself a Tkinter app.

Actually, _because_ IDLE is a Tkinter app,you can use it to
experiment with Tkinter in a very useful way.  The trick is that
you need to start idle with the "-n" (No subprocesses) switch.
This is so useful that I build a shortcut on my desktop to do exactly
this.  Using this shortcut you can see the effect of each action as
you type it, giving you an idea of exactly what must happen.

I'm assuming you are using Python 2.5 here (other versions have
related recipes, but slightly more complicated).
Right click on the desktop, and choose "New Shortcut."

For "Choose the location of the item", browse to (or type in)
     C:\Python25\pythonw.exe
Then (after your next) pick a name for your shortcut.
Right click on the resulting shortcut, and go to "properties"
Change the "Target" entry from:
     C:\Python25\pythonw.exe
to:
     C:\Python25\pythonw.exe -m idlelib.idle -n
Also, if you are like me, you'll want to change the "Start in" directory
to wherever you work on python code --so imports of your own stuff "just
work", and so "File open'" and "Save As" default to a "nice" directory.

The Idle you get with this "corrupts" more easily, since the "-n" says
"no subprocess."  Things like restarting the shell don't work.  _But_
Tkinter stuff is available (there is already a running mainloop).  You
can interactively do simple things a step at a time and watch the
results.  It is a _great_ way to experiment with Tkinter.


--Scott David Daniels
Scott.Daniels at Acm.Org



From robert.kern at gmail.com  Mon May 19 16:47:44 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 19 May 2008 15:47:44 -0500
Subject: arrays
In-Reply-To: <48313A7F.4050909@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
	<48313A7F.4050909@islandtraining.com>
Message-ID: <g0sp1g$5hg$1@ger.gmane.org>

Gary Herron wrote:
> 1.  Why have you flooded this news group with three identical copies of 
> a question under three different subject?  This is a (mild) bit of abuse 
> of the newsgroup.  One copy with a reasonable subject line is enough.

If you look at the dates, they are a few days old. I imagine he was having 
posting problems, and the messages finally worked their way out of whatever 
queue they were being held up in.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From darcy at druid.net  Mon May 12 16:17:45 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Mon, 12 May 2008 16:17:45 -0400
Subject: thread stomp?
In-Reply-To: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
References: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
Message-ID: <20080512161745.186618bf.darcy@druid.net>

On Mon, 12 May 2008 20:00:52 GMT
pyn3wb <pyn3wb at pyn3wb.com> wrote:
> class1 (threading.Thread):
                           ^
SyntaxError: invalid syntax

Give us a script that works.  Ideally it should output something that
indicates what the error is.

> 		//run over files

This is not a comment in Python.

> class2 threads seems to start prior to class1 threads done; class2 
> results depend on class1 finish first

What are you trying to do?  If all you care about is making one thread
depend on another finishing, why make two threads?  Just have one
thread do one thing and then do the other.

Not every problem is a threading problem.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From lists at cheimes.de  Tue May 13 06:37:38 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 13 May 2008 12:37:38 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <g0br1i$2n9$1@ger.gmane.org>

wxPythoner at gmail.com schrieb:
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.

You are confusing immutable objects with singletons. Never use "is" with
strings and numbers.

Christian



From dullrich at sprynet.com  Fri May 30 10:50:16 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:50:16 -0500
Subject: Getting up and running with Python on a Mac
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <dullrich-7A14DA.09501630052008@text.giganews.com>

In article 
<7d593f8a-92b8-4dfe-935f-dd6a22c70faf at m45g2000hsb.googlegroups.com>,
 tkpmep at hotmail.com wrote:

> I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
> 10.5.3), and am looking to install Python on it, and to use it with
> XCode, Apple's IDE. 

If that's what you really want to do then start XCode, select
New Project and look for the ones with "Python" in their names.

I was excited to hear that Python was going to be automatically
integrated into XCode in OS 10.5. I tried it once. I should say
I really didn't give it a fair trial - the impression I got from
my unfair trial was I'd have to learn a lot about Cocoa to do
anything useful. 

Searched a little, decided to try wxPython next, and I was
very happy with that. Seems much easier - also as far as I
could see there was nothing but a 'Hello World' example
included in XCode, while wxPython comes with a truly amazing
suite of complete examples (the C++ wxWidgets book recommends
looking at wxPython for the examples!)

>Some googling suggests that a number of people
> have had trouble getting Python to run satisfactorily on their Macs.
> This is my first Mac, and I'd appreciate some guidance on what to do
> (and what not to) when installing Python and potential problems to
> keep an eye open for. I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant  - I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.
> 
> Thank you in advance
> 
> Thomas Philips

-- 
David C. Ullrich


From arnodel at googlemail.com  Wed May 14 15:20:44 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 20:20:44 +0100
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
	<g0fcgs$g59$3@registered.motzarella.org>
Message-ID: <m2skwkae0j.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Arnaud Delobelle wrote:
>
>> The standard Python way is using enumerate()
>>
>> for i, line in enumerate(fp):
>>     print "line number: " + lineno + ": " + line.rstrip()
>>
>
> I guess you meant to say :
>
>  for lineno, line in enumerate(fp):
>      print "line number: " + lineno + ": " + line.rstrip()

Yes!

-- 
Arnaud


From tjreedy at udel.edu  Mon May 19 09:06:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 09:06:50 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com><m2ve1b7msb.fsf@googlemail.com><mailman.1328.1211170968.12834.python-list@python.org>
	<6062786d-6f83-4850-bf55-4db4ec27bdea@b1g2000hsg.googlegroups.com>
Message-ID: <g0ru19$tcc$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:6062786d-6f83-4850-bf55-4db4ec27bdea at b1g2000hsg.googlegroups.com...
| On May 19, 5:22 am, "Terry Reedy" <tjre... at udel.edu> wrote:
| > "Arnaud Delobelle" <arno... at googlemail.com> wrote in message
| [...]
| > | Note that the same thing can be said about generator expressions,
| > | which are nothing more than anonymous, non-reusable, generator
| > | functions.
| >
| > Right.  So if someone posted on genexp confusion, I would suggest
| > 'write a full generator function'.
|
| I was just arguing against arguing for the removal of lambda on the
| basis that it doesn't add any functionality to the language!

I sort of understood that ;-)
Like Guido, I am split on keep/remove.
However, I have decided to leave lambda out of my Python-subset 
executable-pseudocode algorithm language.  I have not decided whether or 
not to include genexps.

| > | Instead these were _added_ to the language!
| >
| > As a convenience.
| > Actually, if one uses more that one for-clause in a generator 
expression,
| > there is a potential gotcha in relation to name capture.  So if that 
bites,
| > the genexp is not so much a convenience, and one might better write
| > the full function.

| Yes, IMHO this is a bug, and I wish I had the time to dive into the
| code to see if I can fix it.

If I do include them, I might restrict them to one for-clause because of 
that glitch, whose details I keep forgetting.

tjr
| 





From dullrich at sprynet.com  Wed May 14 16:47:18 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 15:47:18 -0500
Subject: sys.excepthack...
Message-ID: <dullrich-866845.15471814052008@text.giganews.com>

Becoming a fan of wxPython, but I can't stand
what it does with error messsages (I can't find
a way to dismiss that window with the error message
from the keyboard. Seems to be anti-modal - the
key strokes that normally kill the active window
kill the main window (sitting behind the window
with the error message) instead. If the window
only had an OK button...)

So I want to pop up a modal dialog on error.

Tried setting sys.stderr to an object with a
write method that pops up a dialog. The problem
with that is write() gets called several times
per exception - I don't see how to get my new
sys.stderr object to figure out when it's time
to show the message.

So then I found sys.excepthook. The problem with
that was that I was too stoopid to figure out how
to get a readable error message from the parameters
passed to excepthook.

Came up with a ridiculous hack involving both sys.stderr
and sys.excepthook. Works exactly the way I want.
Seems ridiculous - what's the right way to do this?

Ridiculous_hack.py:

import sys
import wx

def hook(*args):
  try:
    sys.__excepthook__(*args)
  finally:
    printer.Show()

class ErrorDisplay:
  def __init__(self):
    self.buffer = ''
  def write(self, text):
    self.buffer = self.buffer + text

  def Show(self): 
      wx.MessageDialog(None, str(self.buffer), 
                      'Error:',wx.OK).ShowModal()
      self.buffer = ''

printer = ErrorDisplay()
sys.stderr = printer
sys.excepthook = hook

-- 
David C. Ullrich


From gagsl-py2 at yahoo.com.ar  Mon May 26 19:25:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 20:25:56 -0300
Subject: Cannot Read MySQLdb docs within Python interpreter
References: <a5c7717d-22aa-40bc-981d-76766eb43d32@u12g2000prd.googlegroups.com>
Message-ID: <op.ubsbdidfx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 11:09:27 -0300, Con <conradwt at gmail.com> escribi?:

> Hi, I'm gettting a traceback when I attempt to read the MySQLdb docs
> after installation on Mac OS X 10.5.2:

Better to report it at bugs.python.org

-- 
Gabriel Genellina



From alokkat at gmail.com  Wed May 28 00:22:59 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 00:22:59 -0400
Subject: multi dimensional dictionary
Message-ID: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>

Dear All,

I am using dictionary for filling my xpath parsed data.

I wanted to use in the following manner.

mydict[index] ["key1"] ["key2"]    #Can someone help me with right
declaration.

So that I can fill my XML xpath parsed data

mydict[0] ["person"] ["setTime"] = "12:09:30"
mydict[0] ["person"] ["clrTime"] = "22:09:30"

Can someone help me with right declaration usages. Your help will be highly
appreciated.

Regards
Alok
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From sjmachin at lexicon.net  Sat May 17 05:12:40 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 17 May 2008 09:12:40 GMT
Subject: Getting elements and text with lxml
In-Reply-To: <6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<mailman.1265.1210987210.12834.python-list@python.org>
	<6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>
Message-ID: <482ea185$1@news.mel.dft.com.au>

J. Pablo Fern?ndez wrote:
> On May 17, 2:19 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pup... at pupeno.com>  
>> escribi?:
>>
>>
>>
>>> Hello,
>>> I have an XML file that starts with:
>>> <vortaro>
>>> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
>>> <kap>
>>>   <ofc>*</ofc>-<rad>a</rad>
>>> </kap>
>>> out of it, I'd like to extract something like (I'm just showing one
>>> structure, any structure as long as all data is there is fine):
>>> [("ofc", "*"), "-", ("rad", "a")]
>>> How can I do it? I managed to get the content of boths tags and the
>>> text up to the first tag ("\n   "), but not the - (and in other XML
>>> files, there's more text outside the elements).
>> Look for the "tail" attribute.
> 
> That gives me the last part, but not the one in the middle:
> 
> In : etree.tounicode(e)
> Out: u'<kap>\n  <ofc>*</ofc>-<rad>a</rad>\n</kap>\n'
> 
> In : e.text
> Out: '\n  '
> 
> In : e.tail
> Out: '\n'
>

You need the text content of your initial element's children, which 
needs that of their children, and so on.

See http://effbot.org/zone/element-bits-and-pieces.htm

HTH,
John




From benjamin.kaplan at case.edu  Thu May 29 09:47:10 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 29 May 2008 09:47:10 -0400
Subject: Tuple of coordinates
In-Reply-To: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <ec96e1390805290647k54149a35i631c5504be2dfb73@mail.gmail.com>

On Thu, May 29, 2008 at 8:16 AM, victor.herasme at gmail.com <
victor.herasme at gmail.com> wrote:

> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>     for j in (beg, end, step):
>          for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>
>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>

The pseudo-code and the intended result are two completely different things.
The pseudo-code would give you [(i1,j1,k1),(i1,j1,k2),(i1,j2,k1)...]. That
code would be written

coords = list()
for i in xrange(beg, end, step) :
   for j in xrange(beg, end, step) :
      for k in xrange(beg, end, step) :
         coords.append((i,j,k))

for the result you gave, you would do

i = xrange(beg, end, step)
j = xrange(beg, end, step)
k = xrange(beg, end, step)
coords = zip(i,j,k)


>
> Victor
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From BrianVanderburg2 at aim.com  Tue May 13 01:50:18 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Tue, 13 May 2008 01:50:18 -0400
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <48292C1A.5030200@aim.com>

John Salerno wrote:
> Just something that crosses my mind every time I delve into "Learning 
> Python" each night. Does anyone see any value in learning Python when you 
> don't need to for school, work, or any other reason? I mean, sure, there's 
> value in learning anything at any time, but for something like a programming 
> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off, but for the most part I'm 
> wondering what people's thoughts are as far as simply learning it for the 
> sake of learning. Does it seem like a silly endeavor to most people? Did 
> anyone here learn a programming language when you didn't need to? If so, how 
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense! 
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
I think almost anyone especially if frequently uses computer could 
benefit from learning a scripting language.  I'm mainly a C and C++ 
person and most of my programs use it.  But when I want to do a simple 
one-time task or something that will change frequently I'll use a 
scripting language to quickly get it done, such as extracting 
information from a web page or whatever.  With C, C++, and Python I do 
just about whatever I want/need, and they can be combined/embedded as 
well.  In general I think that learning some basics of programming can 
help develop pretty good logic/analytic skills as well, but that's just 
my opinion.  Maybe it's the other way around and logic/analytic skills 
lead to easily learning programing languages.  As for learning for the 
sake of it, if it's fun I don't see how it could hurt any.

Brian Vanderburg II


From tdahsu at gmail.com  Wed May 21 10:23:27 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Wed, 21 May 2008 07:23:27 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
Message-ID: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>

All,

I'd appreciate any help.  I've got a list of files in a directory, and
I'd like to iterate through that list and process each one.  Rather
than do that serially, I was thinking I should start five threads and
process five files at a time.

Is this a good idea?  I picked the number five at random... I was
thinking that I might check the number of processors and start a
multiple of that, but then I remembered KISS and it seemed that that
was too complicated.

If it's not a horrible idea, would anyone be able to provide some
quick code as to how to do that?  Any and all help would be greatly
appreciated!

Thanks in advance!


From johnjsal at NOSPAMgmail.com  Mon May 19 23:42:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:42:14 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
Message-ID: <20080519234214.beae9314.johnjsal@NOSPAMgmail.com>

On Mon, 19 May 2008 20:34:22 -0700 (PDT)
notnorwegian at yahoo.se wrote:

> i am confused.
> 
> x=5
> y=5
> 
> x==y -> True
> x is y -> True
> 
> shouldnt x is y return False since they shouldnt(dont?) point to the
> same place in memory, they just store an equal value?
> 

For some immutable values (such as numbers and strings), Python will have separate variables reference the same object, as an optimization. This doesn't affect anything, since the numbers are immutable anyway and a shared reference won't create any unexpected changes.

It also works with small, but not large, strings:

>>> x = 'hello'
>>> y = 'hello'
>>> x == y
True
>>> x is y
True
>>> a = 'this is longer'
>>> b = 'this is longer'
>>> a == b
True
>>> a is b
False
>>> 

In the above example, Python has created only one string called 'hello' and both x and y reference it. However, 'this is longer' is two completely different objects.


From efurman at admailinc.com  Wed May 14 12:51:40 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 14 May 2008 08:51:40 -0800
Subject: cgitb performance issue
In-Reply-To: <op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <481F585A.5080707@admailinc.com>
	<op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <482B189C.1050302@admailinc.com>


Gabriel Genellina wrote:

>En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman <efurman at admailinc.com> escribi?:
>
>  
>
>>I tried adding a form to our website for uploading large files.
>>Personally, I dislike the forms that tell you you did something wrong
>>and make you re-enter *all* your data again, so this one cycles and
>>remembers your answers, and only prompts for the file once the rest of
>>the entered data is good.  However, the first time the form loads it can
>>take up to 30 seconds... any ideas why?
>>    
>>
>
>Hard to tell without looking at the code... And what has cgitb to do with this?
>  
>
Hmmmm... excellent question, and the answer is -- Nothing.  My 
apologies.  I'm importing cgi (cgitb was while I was debugging it), as 
well as a bunch of others.

Here's the source, with a bunch of the actual html stripped out.  The -u 
as well as the last two lines were an attempt to eliminate the 30-second 
pause while it loads, as it seems to get all data transferred, then just 
waits for a while.  Any ideas appreciated.  My apologies for the ugly code.
-- 
Ethan

<code>
#!/usr/local/bin/python -u

import cgi
#import cgitb; cgitb.enable()
import smtplib
import mimetypes
import os
import sys
from email.Encoders import encode_base64
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart

HEADER = """Content-type: text/html\n
   <snip>
   """
SELECTFILES = """
   <snip>
"""
FILESRECEIVED = """
   <snip>
"""
VERIFIED = """
   <snip>
"""
FOOTER = """
   <snip>
   </body>
</html>"""

REQUIRED = '<br><i>*required</i>'
form = cgi.FieldStorage()

clientname = clientemail = clientcsr = subject = body = ""
csrs = {"frank":{'html':'selected="yes"', 'name':'<name removed>', 
'email':'<email removed>'}, \
       "kathy":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "chris":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "tracy":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "susi": {'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "bill": {'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}}
incomplete = False
files = []
filelist = []


if form:
   if form.has_key("name"):
       clientname = form["name"].value
   if form.has_key("email"):
       clientemail = form["email"].value
   if form.has_key("CSR"):
       clientcsr = form["CSR"].value
       csrs["frank"]['html'] = ''                              # clear 
default
       csrs[clientcsr]['html'] = 'selected="yes"'
   if form.has_key("subject"):
       subject = form["subject"].value
   if form.has_key("body"):
       body = form["body"].value
   incomplete = not (clientname and clientemail and clientcsr and subject)
     if form.has_key("file1"):
       file1 = form["file1"]
       if file1.filename:
           files.append(file1.filename + "<br>")
           filelist.append(file1)
   if form.has_key("file2"):
       file2 = form["file2"]
       if file2.filename:
           files.append(file2.filename + "<br>")
           filelist.append(file2)
   if form.has_key("file3"):
       file3 = form["file3"]
       if file3.filename:
           files.append(file3.filename + "<br>")
           filelist.append(file3)
   if form.has_key("file4"):
       file4 = form["file4"]
       if file4.filename:
           files.append(file4.filename + "<br>")
           filelist.append(file4)
   if form.has_key("file5"):
       file5 = form["file5"]
       if file5.filename:
           files.append(file5.filename + "<br>")
           filelist.append(file5)
      def csrform():
   cn_present = ''
   ce_present = ''
   sb_present = ''

   if incomplete:
       if not clientname:
           cn_present = REQUIRED
       if not clientemail:
           ce_present = REQUIRED
       if not subject:
           sb_present = REQUIRED
             print """
      <html snipped>
                       <form action="/cgi-bin/contact_files.py" 
method="POST" enctype="multipart/form-data">
                       <p>
                       Please fill in your name, e-mail address, 
subject, and select your CSR.  You will then be able to upload files
                       on the next screen.  Any additional notes may go 
in the Message field.
                       <br /></p>
                       <table border="0">
         """
   print """
                       <tr><td>Your name</td><td><input type="text" 
size="40" maxlength="50" name="name" value="%s">%s</td></tr>""" \
                               % (clientname, cn_present)
   print """
                       <tr><td>Your e-mail</td><td><input type="text" 
size="40" maxlength="100" name="email" value="%s">%s</td></tr>""" \
                               % (clientemail, ce_present)
   print """
                       <tr><td>Subject line</td><td><input type="text" 
size="40" maxlength="100" name="subject" value="%s">%s</td></tr>""" \
                               % (subject, sb_present)
   print """
                       <tr><td>Your CSR</td><td><select name="CSR">
                       <option %s value="frank">Frank</option>
                       <option %s value="kathy">Kathy</option>
                       <option %s value="chris">Chris</option>
                       <option %s value="tracy">Tracy</option>
                       <option %s value="susi">Susi</option>
                       <option %s value="bill">Bill</option>
                       </select></td></tr>""" \
                               % (csrs["frank"]['html'], 
csrs["kathy"]['html'], csrs["chris"]['html'], csrs["tracy"]['html'], 
csrs["susi"]['html'], csrs["bill"]['html'])
   print """
       <html snipped>""" % (body)
  def uploadform():
   try:
       msg = MIMEMultipart()
       msg['To'] = "%s <%s>" % (csrs[clientcsr]['name'], 
csrs[clientcsr]['email'])
       msg['From'] =  "Ad-Mail Upload Manager for %s 
<www at admailinc.com>" % (clientname, )
       msg['Reply-to'] = clientemail
       msg['Subject'] = subject
       msg.attach(MIMEText(body))
       for file in filelist:
           attachment = MIMEBase('application', 'octet-stream')
           attachment.set_payload(file.file.read())
           encode_base64(attachment)
           attachment.add_header('Content-Disposition', 'attachment', 
filename=os.path.split(file.filename)[1])
           msg.attach(attachment)
       smtp = smtplib.SMTP()
       smtp.connect()
       smtp.sendmail('Ad-Mail Upload Manager <www at admailinc.com>', 
csrs[clientcsr]['email'], msg.as_string())
       smtp.close
   except:
       print "<H1>Unknown error.  Please try again later.</H1>"
       smtp = smtp
if not (form and clientname and clientemail and clientcsr):
   print HEADER
   csrform()
   print FOOTER

elif files:
   print HEADER
   print FILESRECEIVED % (' '.join(files), csrs[clientcsr]['name'])
   uploadform()
   print FOOTER
    else:
   print HEADER
   print SELECTFILES % (clientname, clientemail, subject, clientcsr, 
body, clientname.split()[0], csrs[clientcsr]['name'].split()[0])
   print FOOTER

sys.stdout.flush()
sys.stdout.close()
</code>
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From google at mrabarnett.plus.com  Thu May 15 18:18:57 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 15 May 2008 15:18:57 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
Message-ID: <a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>

On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> you're right, my java implementation does indeed parse for Id3v2
> (sorry for the confusion).  i'm using the getrawid3v2() method of this
> bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> i buffer and parse.  apologies if i misrepresented my code!
>
> back to python, i wonder if i'm misusing the mutagen id3 module.  this
> brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> Mutagen/Tutorial) leads me to believe that something like this might
> work:
>
> from mutagen.mp3 import MP3
> id3tags = MP3(urllib2.urlopen(URL))
>
> but this gives me the following TypeError: "coercing to Unicode: need
> string or buffer, instance found".  does this mean i need to convert
> the "file-like object" that is returned by urlopen() into a unicode
> object?  if so, do i just decode() with 'utf-8', or is this more
> complex?  as of now, doing so gives me mostly "No such file or
> directory" errors, with a few HTTP 404s.
>
[snip]
I think it's expecting the path of the MP3 but you're giving it the
contents.


From gagsl-py2 at yahoo.com.ar  Sun May 18 00:45:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 01:45:57 -0300
Subject: Shelve or pickle module
References: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>
Message-ID: <op.ubb16vfbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 00:14:19 -0300, Guillaume Bog <guibog at gmail.com> escribi?:

> I read and re-read "Python in a Nutshell" written by Alex Martelli,
> who knows what he is talking about. I'm a bit new to python and I'm
> going to start doing persistence side on a project. Martelli's book
> seems to tell me that I should use shelve module, but any code I
> browsed is using pickle instead. Is there any reason to prefer pickle
> over shelve?

A shelve is just a persistent dictionary that uses pickle to store the objects.
If you want to store one or a few objects, using pickle directly may be easier.
Any problem you may have with pickle (nonpickleable objects, security risks) will happen with shelve too.

-- 
Gabriel Genellina



From skunkwerk at gmail.com  Mon May  5 12:02:12 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 5 May 2008 09:02:12 -0700 (PDT)
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
Message-ID: <65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>

On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
>
>
> > i'm redirecting the stdout & stderr of my python program to a log.
> > Tests i've done on a simple program with print statements, etc. work
> > fine.  however, in my actual program i get weird output like this:
>
> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> > if any
> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
> > from queue, if any
> > 2008-05-04 20:20:44,790 DEBUG
> > DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any
>
> > class write2Log:
> >    def write(self, x):
> >            if x!='\n':
> >                    logger.debug(str(x))
>
> > any ideas what might be causing the problems?  some of the messages
> > being output are quite long - might this be a problem?
>
> Try this simplified example and see by yourself:
>
> import sys
>
> class Write2Log:
>      def write(self, x):
>          sys.__stdout__.write('[%s]' % x)
>
> sys.stdout = Write2Log()
>
> print "Hello world!"
> age = 27
> name = "John"
> print "My name is", name, "and I am", age, "years old."
>
> --
> Gabriel Genellina

thanks Gabriel,
   i tried the code you sent and got output like the following:
[My name is][][john][][and I am][][27][][years old.]

it doesn't really help me though.  does this have any advantages over
the syntax i was using?
are there any limits on what kind of objects the logger can write?  ie
ascii strings of any length?

thanks


From deets at nospam.web.de  Tue May 20 09:34:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:34:16 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <69g2bpF31ttuuU1@mid.uni-berlin.de>

John Salerno wrote:

> I posted this code last night in response to another thread, and after I
> posted it I got to wondering if I had misused the list comprehension.
> Here's the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and
> it's being used as everyone expects it to be used. In example 2, however,
> I began to think this might be an abuse of list comprehensions, because
> I'm not assigning the result to anything (nor am I even using the result
> in any way).
> What does everyone think about this? Should list comprehensions be used
> this way, or should they only be used to actually create a new list that
> will then be assigned to a variable/returned/etc.?

the above code is pretty much of a no-no because it has quadratic runtime
behavior.

That being said, I use that idiom myself.  But I don't see anything wrong
with using a list-comp as loop-abbreviation. because that is it's actual
purpose. And also it is common in non-functional languages that l-values
aren't always assigned, if the aren't needed. It's the consequence of
having side-effects in a language - and python has them.

Diez




From danb_83 at yahoo.com  Wed May 21 00:55:14 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 20 May 2008 21:55:14 -0700 (PDT)
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <30577157-d93c-4e7c-90bb-f9d8dfee56d7@8g2000hse.googlegroups.com>

On May 20, 5:59?pm, Robert Kern <robert.k... at gmail.com> wrote:
> Ethan Furman wrote:
> > Greetings,
>
> > I'm looking at the struct module for binary packing of ints and floats. ?
> > The documentation refers to C datatypes. ?It's been many years since I
> > looked at C, but I seem to remember that the data type sizes were not
> > fixed -- for example, an int might be two byes on one machine, and four
> > bytes on the next. ?Can any C programmers verify this? ?If it is true,
> > does that mean that struct.pack('h', 8001) might give me different
> > results depending on the machine it's running on?
>
> Right. I believe (but could be wrong) that "char" is defined to be one byte, but
> that "short", "int", "long", and "long long" are defined as "at least as big as
> the previous type".

There are also minimum sizes for each type:

char: 8 bits
short: 16 bits
int: 16 bits
long: 32 bits
long long: 64 bits

> In practice, though, on nearly every machine that Python runs on, "char" is one
> byte, "short" is two bytes, and "int" is four bytes. "longs" and "long longs"
> tend to vary substantially, though; never assume sizes for them.
>
> Single-precision floats are always four bytes and double-precision floats are
> always eight bytes. "long doubles" vary; they could be twelve bytes or sixteen.
>
> If you want to deal with fixed sizes, use struct.calcsize() to test the sizes of
> each of the integer types, assign them to width-specific aliases, and always use
> these aliases.

Also, according to the documentation for the struct module, the =, <,
and > format characters specify "std. size" rather than "native size".


From notnorwegian at yahoo.se  Tue May 20 14:34:15 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Tue, 20 May 2008 11:34:15 -0700 (PDT)
Subject: iterate start at second row in file not first
Message-ID: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>

i have a big file with sentences, the first file of each sentence
contains a colon(:) somewher eon that line
i want to jump past that sentence.

if all(x != ':' for x in line):

this way i  can check but i dont want to check for every line in the
whole file, quite unnecessary when i only need to
chekc the first line.


so the question is, when dealign with iterators like:
mov = open(afile)
for line in mov:
	do y

how do i jump the first step there? i dont want to iterate the first
row...how do i start at the second?




From woodygar at sky.com  Wed May 21 12:42:51 2008
From: woodygar at sky.com (garywood)
Date: Wed, 21 May 2008 17:42:51 +0100
Subject: can someone with guessing a number 
Message-ID: <005101c8bb61$b78fb710$1300a8c0@Home>

I would just like the program to exit after guessing the amount of numbers wrong 

# Guess My Number
import random  
the_number = random.randrange(100) + 1
tries = 1
# guessing loop
while (guess != the_number):
    if (guess > the_number):
        print "Lower..."
    else:
        print "Higher..."

    guess = int(raw_input("Take a guess: "))       
    tries += 1
    if tries > 10:
        print 'you failed- give up'

print "You guessed it!  The number was", the_number
print "And it only took you", tries, "tries!\n"
  
raw_input("\n\nPress the enter key to exit.")

many Thanks 
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From dullrich at sprynet.com  Sat May 24 07:23:48 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:23:48 -0500
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<C3q*E9Bds@news.chiark.greenend.org.uk>
Message-ID: <2auf34dc59ajcjfq7f3fl0366eukfd98d5@4ax.com>

On 23 May 2008 18:23:04 +0100 (BST), Matthew Woodcraft
<mattheww at chiark.greenend.org.uk> wrote:

>John Salerno  <johnjsal at gmailNOSPAM.com> wrote:
>> Basically, the question is this: can you write the logic behind a 
>> program (whether it be a game, an email client, a text editor, etc.) 
>> without having any idea of how you will implement the GUI?
>
>You probably could, but it's best not to unless you're somehow forced
>to.
>
>In practice, the interface that you want your 'logic' layer to provide
>to the GUI is likely to depend on some of the details of how the GUI
>works.
>
>If you did the lower levels first without having any idea at all of
>what you were going to do with the GUI, it's quite likely that you'd
>find you'd written a few functions which turned out not to be needed at
>all, or that some functionality that the GUI needs to use very
>frequently is rather slow to execute, or that some functionality that
>you thought belonged to the 'logic' is really better done in the GUI
>layer, and so on and so forth.
>
>For example, if you were writing the 'logic' for a chess program you
>might choose a way of modelling the board that can't represent a
>position with more than one black king. And then when you got round to
>doing the GUI you might find out that your users would like to be able
>to have this temporarily when setting up a position.

What you say may be true, but this doesn't seem to me like a good
example. Not that I see _why_ the player would want to have
two kings temporarily, but if so I wouldn't have the view report
this state to the model, I'd have the view wait until the player had
decided on the final configuration betore saying anything to the
model. The model should only deal with legal positions.

(Could be that it's not until we start actually playing the game 
through the GUI that we find the model can't deal with two 
black queens. But that's not an example either, that would just 
mean the model is wrong, not allowing every legal position.)

>-M-

David C. Ullrich


From pauljefferson at gmail.com  Sat May  3 19:02:29 2008
From: pauljefferson at gmail.com (Paul Jefferson)
Date: Sun, 4 May 2008 00:02:29 +0100
Subject: Encoding Text
Message-ID: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>

Hi,
I'm learning this and I'm making a program which takes RSS feeds and
processes them and then outputs them to a HTML file.
The problem I have is that some of the RSS feeds contain chachters which I
think are outside of the ascii range as when I attempt to write the file
containing themI get the follwoign error:
File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 201, in
<module>
    runner(1,"save.ahc")
  File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 185, in
runner
    h.write(html[countera])
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in
position 1147: ordinal not in range(128)
For the life of me I can't figure out what I should do to stop this - I
tried to change the html by doing a html[countera] = unicode(html[countera])
but it didn't seem to chaneg anything.
Any help would be greatly appreciated,
Thanks
Paul

>
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From gagsl-py2 at yahoo.com.ar  Sun May 25 20:16:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 21:16:39 -0300
Subject: Storing a function
References: <fe46746a0805251400g47c08a74gd63625330a8e547f@mail.gmail.com>
Message-ID: <op.ubqi11akx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 18:00:12 -0300, Kuros <kurosknight at gmail.com> escribi?:

> Hi,
> Hoping I could get some help with a python question.
>
> I want to be able to store the code for a single function in a .py file,
> such as:
>
> def test():
>     print "Test"
>
> From within a Python script, I would like to be able to get a handler so I
> can do something like:
>
> handler.test()

The "handler" is called a "module" and is created from the .py file by using import...

> I want to be able to store the handlers in a blob in a SQLite DB.

So store the .py file...

> Essentially, I want to store a compiled version of a function. I have tried
> using compile() and exec, and while it sort of works, it seems to import the
> code into the global namespace. I can do:
>
> x = compile(file.read(), "<x>", 'exec')
> exec x
> test()
>
> and it calls test, but I may have several functions with the same name, all
> read from different files. So I need to be able to do handler.test().

If you don't want to store the .py, store the compiled module .pyc
If you still want to create and manage your own fake version of modules, use an explicit namespace:

ns = {}
compiled = compile(...)
exec compiled in ns
test = ns['test']
test()

-- 
Gabriel Genellina



From pball.benetech at gmail.com  Sun May 25 23:40:16 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 20:40:16 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com>
Message-ID: <3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com>

On May 25, 7:46?pm, miller.pau... at gmail.com wrote:
> > I think this problem is related to integer partitioning, but it's not
<snip>
>
> If, by "integer partitioning," you mean the "subset sum
> problem" (given a finite set S of integers, does S contain a subset
> which sums up to some given integer k?), then you are right. ?I'm
> reasonably sure there's a polynomial reduction from your problem to
> the subset sum problem. ?That would make your problem NP-complete.

Wow, that's helpful. http://en.wikipedia.org/wiki/Subset_sum clarifies
what I'm trying to do. Yes, it probably is NP-complete. Fortunately my
use case doesn't require that the process finish, just that it produce
a lot. I can exclude trivial cases (e.g., f' = f(S) + s_1 - s_1) with
some sort of simplifier.

> Like I said, because this looks related to the subset sum problem
> (though harder, because you're asking for "all" such functions, for
> some rigorous definition of "all," as per the previous sentence), I
> suspect it's NP-complete. ?However, there are probably some good
> heuristics, such as if s1 has a large intersection with s0, it's
> probably a good idea to use s1 in whatever formula you come up with.

There are a few real-world constraints which make the problem easier,
but only by linear factors, I suspect. More on this below.


> Other than that, I don't really have an idea. ?Can you say what the
> application of this algorithm would be? ?Knowing the use case might
> suggest a better approach.

This is a problem in statistical estimation. Given n records made up
of k variables, define a cell as the point in the cartesian product of
v_1 * v_2 * ... * v_k. I want to apply an estimator on the data in
each cell.

However, many cells are empty, and others are too sparse to support
estimation. One solution is to build lots of valid aggregations,
called "strata," for which estimates can be made for chunks of cells.
A "valid aggregation" is a sequence of *adjacent* cells (see below)
whose data are pooled (by whatever mechanism is relevant to the
estimator).

The cells are "elements" in my initial problem statement, and the
strata are the sets.

The constraints I mentioned are on the composition of strata: strata
can only contain sequences of adjacent cells, where adjacency is
defined for each variable. Two cells are adjacent if they are equal on
every variable except one, and on that one and by its definition, they
are adjacent.

Does this make it easier to understand, or more difficult? thanks --
PB.



From gabe at dragffy.com  Thu May 15 06:51:27 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:51:27 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<905611fd-e5c4-478f-a0bd-417ccc5fe0a1@d77g2000hsb.googlegroups.com>
Message-ID: <loom.20080515T105059-609@post.gmane.org>

 <bockman <at> virgilio.it> writes:

> >>> tasks = [ [] for x in xrange(6) ]
> >>> tasks[0].append(1)
> >>> tasks
> [[1], [], [], [], [], []]
> >>>
> 

Thanks, Bockman




From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 30 18:58:09 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 30 May 2008 18:58:09 -0400
Subject: accumulator generators
In-Reply-To: <11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<6ab4u7F35bmisU1@mid.uni-berlin.de>
	<11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>
Message-ID: <xD%%j.155$tT4.67@bignews4.bellsouth.net>

Cameron wrote:
> On May 30, 1:04 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Cameron schrieb:
>>
>>
>>
>>> I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
>>> Graham article</a> and he builds an accumuator generator function in
>>> the appendix. His looks like this:
>>> <pre>
>>> def foo(n):
>>>   s = [n]
>>>   def bar(i):
>>>     s[0] += i
>>>     return s[0]
>>>   return bar
>>> </pre>
>>> Why does that work, but not this:
>>> <pre>
>>> def foo(n):
>>>   s = n
>>>   def bar(i):
>>>     s += i
>>>     return s
>>>   return bar
>>> </pre>
>> Because python's static analysis infers s as being a variable local to
>> bar in the second case - so you can't modify it in the outer scope.
>>
>> In the future, you may declare
>>
>> def bar(i):
>>      nonlocal s
>>      ...
>>
>> Diez
> 
> thanks for the response. Just to make sure I understand- Is the reason
> it works in the first case because s[0] is undefined at that point (in
> bar), and so python looks in the outer scope and finds it there?

You can refer to variables in enclosing scopes, just not redefine them in that 
same scope.  That's why in the first example, bar can refer to to s (defined in 
foo).  By assigning to s[0], it modifies the list, which is OK; trying to 
redefine the name 's' (like the second example tries to do) would not be OK.

Also see: http://zephyrfalcon.org/labs/python_pitfalls.html (pitfall #6).

-- 
Hans Nowak (zephyrfalcon at gmail dot com)
http://4.flowsnake.org/


From zerty.david at gmail.com  Mon May  5 18:43:24 2008
From: zerty.david at gmail.com (David Anderson)
Date: Mon, 5 May 2008 19:43:24 -0300
Subject: How to generate binary python?
Message-ID: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com>

Hi, i'm comingo from Java and I'm wanting to know what in Python is the
equivalent to the file.class in java, I am producing some apps that ar not
open source, so I would like to share only the binaries, Both for Windows
and for Linux, Can you suggest me anything?
Bye
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From duncan.booth at invalid.invalid  Sun May 11 07:57:48 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 11:57:48 GMT
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <Xns9A9B83DE83757duncanbooth@127.0.0.1>

wxPythoner at gmail.com wrote:

> There's a thing that bugs me in Python. Look at this...
> 
>>>> print "Testing\"
> SyntaxError: EOL while scanning single-quoted string
> 
> 
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?
> 
Of course it is, but that isn't what is meant here.

Python supports single-quoted strings which are delimited by either a 
single quote or a double quote mark. It also supports triple-quoted strings 
which are delimited either by three single quotes or three double quotes.

The overloaded meaning of 'single' is perhaps unfortunate.


From notnorwegian at yahoo.se  Mon May 26 16:52:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 13:52:35 -0700 (PDT)
Subject: python raycaster, pycaster, where?
Message-ID: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>

i tried googling this thing but couldnt find it. i cant find it in
pyagme either.

anyone know?


From Lie.1296 at gmail.com  Thu May 15 11:48:06 2008
From: Lie.1296 at gmail.com (Lie)
Date: Thu, 15 May 2008 08:48:06 -0700 (PDT)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <9928a35e-9fa7-4df2-9b5c-ad078ecac566@y18g2000pre.googlegroups.com>

On May 15, 5:08?pm, Gabriel <g... at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
> >>> tasks = [[]]*6
> >>> tasks
>
> [[], [], [], [], [], []]>>> tasks[0].append(1)
> >>> tasks
>
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
> I got this example from page 38 of Beginning Python.
>
> Regards
>
> Gabriel

As a complementary note, if you want to copy a list (probably a filled
one instead of blank ones like here) and wanted to copy a list so that
the new copy is a completely separate instance from the old copy, you
may use deepcopy (from copy import deepcopy).


From mensanator at aol.com  Tue May 13 13:10:56 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 13 May 2008 10:10:56 -0700 (PDT)
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
Message-ID: <e1a545f4-03c7-44f7-a3b2-68786b6650ec@k13g2000hse.googlegroups.com>

On May 13, 11:59?am, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>
> > if i do something like
> > while 1:
> > ? ? print "x"
>
> > will the program ever stop because it runs out of memory?
>
> No, there is no reason to run out of memory. This will simply
> make an everlasting x-printer and there is no need to store
> anything (except output buffers, terminal scrollback, etc.,
> but all of this is temporary and of limited size). In case of
> adding elements to a list, the memory usage can, of course,
> grow unlimitedly. On linux, if the process eats up too much
> memory, it gets killed. I do not know about windows, but
> they would probably crash with a BSOD or something of that
> sort.

Usually, Windows just says "out of memory".


From artasis at gmail.com  Tue May  6 03:56:52 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Tue, 6 May 2008 00:56:52 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
	<3b460037-46ea-4944-9dc1-516666889da2@2g2000hsn.googlegroups.com>
Message-ID: <0bb87a79-4862-40e5-91cf-92c2f83d43ac@a1g2000hsb.googlegroups.com>

On May 5, 3:48 pm, Jeff <jeffo... at gmail.com> wrote:
> ctypes?

hm..may you explain it?


From skanemupp at yahoo.se  Fri May 16 08:41:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 05:41:15 -0700 (PDT)
Subject: free dictionary english - spanish?
Message-ID: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>

i want to write a translationprogram, i have the  webapp done already.

i need a big free dictionary though. english-spanish/spanish-english
seems like the best i know some spanish and thats what also is needed
the most i think together with chinese.

anywhere you can download one? preferrably easy to parse...


From lobais at gmail.com  Sat May  3 18:31:01 2008
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sun, 04 May 2008 00:31:01 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <fvilul$15ti$1@news.mtu.ru>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>  <fvilul$15ti$1@news.mtu.ru>
Message-ID: <1209853861.29405.1.camel@localhost.localdomain>


On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
> 
> > Arnaud Delobelle wrote:
> >> 
> >> sum() works for any sequence of objects with an __add__ method, not
> >> just floats!  Your algorithm is specific to floats.
> > 
> > This occurred to me also, but then I tried
> > 
> > sum(['abc', 'efg'], '')
> 
> Interesting, I always thought that sum is like shortcut of
> reduce(operator.add, ...), but I was mistaken.
> 
> reduce() is more forgiving:
> reduce(operator.add, ['abc', 'efg'], '' ) # it works
> 'abcefg'

Hm, it works for lists:
sum(([1], [2]), []) 
[1, 2]

However I find the seccond argument hack ugly.
Does the sum way have any performance advantages over the reduce way?

-- 
Best Regards,
Med Venlig Hilsen,
Thomas



From jcd at sdf.lonestar.org  Thu May  8 09:46:51 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 09:46:51 -0400
Subject: Parsing Email 'References' header.
In-Reply-To: <4822F7B6.2000403@gmail.com>
References: <4822F7B6.2000403@gmail.com>
Message-ID: <1210254412.8236.3.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 14:53 +0200, Aspersieman wrote:
> Hi
> 
> I have a python script that parses email headers to extract information 
> from them. I need to get the _last_ messageid in the 'References' field 
> (http://cr.yp.to/immhf/thread.html) to create a threaded view of these 
> emails (these messageid's are stored in a database).
> 
> Now, I can easily access the 'References' field using the python 'email' 
> module, but I need a regular expression to get the last messageid in the 
> 'References' field.
> 
> Here's what I have so far:
> <code>
> rx_lastmesgid = re.compile(r"(<.+>$)")
> lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) # 
> parentid's value is 
> eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
> lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
> </code>
> 
> I need it to return "<5 at mail.gmail.com>"
> 
> Can anyone help?
> 
> Thanks
> 
> Nicol
> 

Forget regular expressions.  

py>>> lastmesgid = '<' + parentid.split('<')[-1]




From bignose+hates-spam at benfinney.id.au  Sat May 24 21:42:48 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:42:48 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
	<mailman.1540.1211661268.12834.python-list@python.org>
Message-ID: <87ej7r9n1j.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Sat, 24 May 2008 17:51:23 +0200
> David <wizzardx at gmail.com> wrote:
> > If I did start doing some kind of TDD, it would be more of the
> > 'smoke test' variety. Call all of the functions with various
> > parameters, test some common scenarios, all the 'low hanging
> > fruit'. But don't spend a lot of time trying to test all possible
> > scenarios and corner cases, 100% coverage, etc, unless I have
> > enough time for it.
> 
> Penny wise, pound foolish. Spend the time now or spend the time
> later after your client complains.

Worse, if you don't spend the time now, you'll end up spending the
time later *plus* all the time to find the bug in the first place, all
the time to tease its behaviour out from all the interdependent code,
all the time to go through more rounds of QA, etc. With BDD, only the
time to code the test is spent, so you save all that other time.

-- 
 \           "Laugh and the world laughs with you; snore and you sleep |
  `\                                             alone."  -- Anonymous |
_o__)                                                                  |
Ben Finney


From dsc at ecs.soton.ac.uk  Thu May 29 06:57:47 2008
From: dsc at ecs.soton.ac.uk (Dave Challis)
Date: Thu, 29 May 2008 11:57:47 +0100
Subject: Any way to loop through object variables?
In-Reply-To: <7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
References: <483D7A47.3030606@ecs.soton.ac.uk>	<483D8614.7000808@islandtraining.com>
	<7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
Message-ID: <483E8C2B.4050700@ecs.soton.ac.uk>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ah thanks, vars(...) was exactly what I was after.  I'd come across
dir() before, but this returns more than I need.

Thanks again,
Dave

Saju Pillai wrote:
> 
> On 28-May-08, at 9:49 PM, Gary Herron wrote:
> 
>> Dave Challis wrote:
>>> Hi,
>>> Just wondering if there's a way to iterate through all variables which
>>> an object has set?
>>>
>>> Specifically, I'm using the OptionParser module, which returns an
>>> options object, containing all command line options as object variables.
>>> I'd like to iterate over these rather than getting at them by name.
>>>
>>> Cheers,
>>> Dave
>>
>> For this object (and many others), you can get at the attributes with
>> the vars(...) builtin.
>> It returns a dictionary of attribute names and values.
> 
> 
> Also dir(object) will get you the list of attributes of that object.
> 
> -srp
> 
>>
>>
>> Gary Herron
>>
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


- --
~~~~~~~~~~~~~~~~~o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                .
                <><                                           (
 )    Dave Challis             ><>                       )    )
_(__dsc at ecs.soton.ac.uk__________________________________(____(___________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFIPowrv26GZvAVVFERApQfAJ96bFa1wl1sbnDCNmbtf5/tpNqTaQCdHKwf
k8+Uv8yXn2Bh5ri6sf5qMmA=
=cnfO
-----END PGP SIGNATURE-----


From nevillednz at gmail.com  Fri May  2 18:51:16 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Fri, 2 May 2008 15:51:16 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>
Message-ID: <4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>

On May 2, 11:13 am, George Sakkis <george.sak... at gmail.com> wrote:
> [1]http://en.wikipedia.org/wiki/Context-free_language
> [2]http://en.wikipedia.org/wiki/Regular_language
> [3]http://wiki.python.org/moin/LanguageParsing

Thanx for the link to these parsers. ANTLR looks interesting.
Yoyo: http://www-users.cs.york.ac.uk/~fisher/software/yoyovwg/readme

I figured out a way to do it in python.

#!/usr/bin/env python2
# -*- coding: utf-8 -*-
import re
tests="""
  { a test  BAD
  { a test } OK
  { a test } { a test } OK
  { a test } { this { a test } is a test } OK
  { a test  { this { a test } is a test } missing close BAD
  a test } { this { a test } is a test } BAD
  { a test } this { a test } is a test } BAD
""".splitlines()[1:]

def referee(str):
  return bool(re.search("OK",test))

def check_open_close(str):
  try:
    eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
[^{}]+)", str) if c))
  except SyntaxError:
    return False
  else:
    return True

for test in tests:
  if check_open_close(test) == referee(test):
    print "DETECTED:",test
  else:
    print "MISSED:",test
[linux]$ ./matchall_open_close.py
DETECTED:   { a test  BAD
DETECTED:   { a test } OK
DETECTED:   { a test } { a test } OK
DETECTED:   { a test } { this { a test } is a test } OK
DETECTED:   { a test  { this { a test } is a test } missing close BAD
DETECTED:   a test } { this { a test } is a test } BAD
DETECTED:   { a test } this { a test } is a test } BAD

It's not exactly what I planned, but as a python one/two-liner it
works fine.
    eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
[^{}]+)", str) if c))

ThanX again
N




From ramu.chandrut at gmail.com  Sun May 11 00:23:06 2008
From: ramu.chandrut at gmail.com (ramu)
Date: Sat, 10 May 2008 21:23:06 -0700 (PDT)
Subject: hai dear
Message-ID: <9316f971-57e5-46e2-9d2f-3d522f6e5588@w8g2000prd.googlegroups.com>

hai friends,

"each day is a new adventure to dream search and discover"

www.goodhistory5.blogspot.com


From tdelaney at avaya.com  Sun May 11 20:05:11 2008
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 12 May 2008 08:05:11 +0800
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <d7837f5f-377e-4d9c-a696-963165648d5e@c58g2000hsc.googlegroups.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C959BF2@301081ANEX2.global.avaya.com>

Mensanator wrote:

> Ok, I agree with 101, but I wouldn't necessarily
> say the others were unfortunate. You might be
> surprised at how often such fixations discover
> bugs, something that I have a gift for.

The discovering, the making, or both? ;)

Tim Delaney


From deets at nospam.web.de  Wed May 21 11:10:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 17:10:56 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
	<4540a28e-59b4-4903-8c93-6239eb257c1f@j22g2000hsf.googlegroups.com>
Message-ID: <69iscvF33u2peU1@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

> On May 21, 4:09 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> cokofree... at gmail.com wrote:
>>
>> >> And wastes time. regular expressions can become expensive to match -
>> >> doing it twice might be hurtful.
>>
>> >> Diez
>>
>> > match = (my_re1.match(line) or my_re2.match(line)) or
>> > my_re3.match(line)
>>
>> How do you know *which* of the three has matched then?
>>
>> Diez
> 
> Depends if the OP wants to know that...

Well, in *general* one wants that. So as a general-purpose solution this is
certainly *not* the way to go.

Diez


From george.sakkis at gmail.com  Mon May  5 23:22:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 5 May 2008 20:22:49 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com> 
	<fvohne$m0f$1@news.xmission.com>
Message-ID: <96a41fd1-23ca-482f-9575-5123611ade8a@z72g2000hsb.googlegroups.com>

On May 5, 11:02 pm, dave <squareswallo... at yahoo.com> wrote:
> On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>
>
>
> > dave <squareswallo... at invalid.com> writes:
>
> >> Hello,
>
> >> I made a function that takes a word list (one word per line, text
> >> file) and searches for all the words in the list that are 'shifts' of
> >> eachother.  'abc' shifted 1 is 'bcd'
>
> >> Please take a look and tell me if this is a viable solution.
>
> >> def shift(word, amt):
> >>        ans = ''
> >>        for letter in word:
> >>                ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> >>        return ans
>
> > In Python, if you want to build a string from lots of parts you can
> > use ''.join(parts).  I think it is considered more efficient.
>
> what would be the best way to write a "ans = ans + chr" into a
> ''.join(parts) ??

Well if you do it once, that would be simply "ans += chr". Arnaud was
referring to the case where you do it in a loop, like in your snippet.
A direct translation to use ''.join would be:

ans = ''.join(chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
              for letter in word)

Of course it is simpler and more efficient if you factor out of the
loop the subexpressions that don't need to be recomputed:

ord_a = ord('a')
shift = ord_a - amt
ans = ''.join(chr((ord(letter) - shift) % 26 + ord_a)
              for letter in word)

George


From mail at timgolden.me.uk  Thu May  8 10:06:16 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 08 May 2008 15:06:16 +0100
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <fvut8a$b67$1@theodyn.ncf.ca>
	<op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <482308D8.3050106@timgolden.me.uk>

Gabriel Genellina wrote:
> En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:
> 
>> The readme.txt has:
>>
>> All you need to do is open the workspace
>> "pcbuild.sln" in Visual Studio,
>> select the desired combination of
>> configuration and platform and eventually
>> build the solution. Unless you are going
>> to debug a problem in the core or
>> you are going to create an optimized
>> build you want to select "Release" as
>> configuration.
>>
>> Unfortunately, the Express Edition
>> (Free) doesn't handle "solution" files.
> 
> Python builds fine with Visual C++ Express Edition.
> Select Release, Win32 from the dropdown lists, press F7, 
> and wait for compilation to complete...

Or, if you prefer not to have the long startup time for Visual Studio,
simple start a command prompt in python\pcbuild, call the env
cmd script and then the build script:

<screendump>
C:\temp>cd \work_in_progress

C:\work_in_progress>cd python

C:\work_in_progress\python>cd PCbuild

C:\work_in_progress\python\PCbuild>env
Build environments: x86, ia64, amd64, x86_amd64, x86_ia64

Setting environment for using Microsoft Visual Studio 2008 x86 tools.

C:\work_in_progress\python\PCbuild>build
vcbuild /useenv pcbuild.sln  "Release|Win32"
Microsoft (R) Visual C++ Project Builder - Command Line Version 9.00.21022
Copyright (C) Microsoft Corporation. All rights reserved.

Build started: Project: make_versioninfo, Configuration: Release|Win32
Compiling...

</screendump>

TJG


From johnroth1 at gmail.com  Fri May 23 11:01:52 2008
From: johnroth1 at gmail.com (John Roth)
Date: Fri, 23 May 2008 08:01:52 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>

On May 23, 3:36 am, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interested in this behavior?

I'm not. If there are any changes in the current behavior I'd much
prefer that unittest create a random permutation as a way of flushing
out intertest dependencies.

> Does the following patch has a chance of being introduced in the
> standard python distribution?

I certainly hope not!

John Roth
Python FIT



From murder_113 at hotmail.com  Sun May  4 19:46:31 2008
From: murder_113 at hotmail.com (Chunky)
Date: Mon, 5 May 2008 01:46:31 +0200
Subject: Python Poker
Message-ID: <BAY105-DS151A39D9CB408484DF4A9BAD40@phx.gbl>

hey Jeff Sandys sandysj at juno.com 

did you manage to get your game up for download it sounds really interesting i love "home made games"
-------------- next part --------------
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From dcoffin at gmail.com  Mon May  5 10:14:48 2008
From: dcoffin at gmail.com (dcoffin at gmail.com)
Date: Mon, 5 May 2008 07:14:48 -0700 (PDT)
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <2e022afa-8593-452f-aa73-1837f339944a@m44g2000hsc.googlegroups.com>

> the class-thing seems inside out somehow in python. if im doing
> foo.Hello() im already saying that im using the class foo because i
> did foo=Foo() before and then still when calling Hello() i am
> invisibly passing the class itself a s a parameter by default?
> just seems backwards and weird.

You're not passing a reference to the class, you're passing a
reference to the object. Any object-orientated programming language
will be passing methods references to an object; Python just makes
that explicit within the method definition. See http://www.python.org/doc/faq/general/#id35


From johnjsal at NOSPAMgmail.com  Tue May 20 16:21:04 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 16:21:04 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
	<g0umoh$i0s$1@news.lysator.liu.se>
Message-ID: <48333296$0$28632$c3e8da3@news.astraweb.com>

"Thomas Bellman" <bellman at lysator.liu.se> wrote in message 
news:g0umoh$i0s$1 at news.lysator.liu.se...
> "John Salerno" <johnjsal at NOSPAMgmail.com> writes:
>
>> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
>> news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
>>> the above code is pretty much of a no-no because it has quadratic 
>>> runtime
>>> behavior.
>
>> What's that mean, exactly?

> However, it actually depends on what your input is.  For the
> runtime to increase with the square of the input length in your
> function, the number of *unique* items on the input must be a
> constant fraction of the input length.

Whew! Let me re-read your post...........   :) 




From Thomas.Karolski at googlemail.com  Fri May 23 15:25:19 2008
From: Thomas.Karolski at googlemail.com (Thomas Karolski)
Date: Fri, 23 May 2008 21:25:19 +0200
Subject: Decorator metaclass
In-Reply-To: <200805230739.29745.maric@aristote.info>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<200805230739.29745.maric@aristote.info>
Message-ID: <g175nc$4ao$1@ger.gmane.org>

Turns out the first msg I sent did not reach the list, so I'll just post 
what I've achieved by now:
------------------------------------------
class DecoratorDummy(object): pass

class InheritedDecoratorType(type):
	def __new__(cls, name, bases, dct):
		# return if its a class which inherited from Decorator
		if Decorator in bases:
			return type.__new__(cls, name, bases, {})
		
		# if its a class which did not directly inherit from Decorator,
		# then it inherited from a class which has been manipulated using the
		# Decorator class.
		# in that case we change the bases of the inheriting class.
		# We'll split the manipulated class into Decorator and its implementation
		for b in bases:
			if type(b) is InheritedDecoratorType:
				break
		newbases = [x for x in bases]
		# remove the manipulated base class
		newbases.remove(b)
		# and add the impl of the manipulated base class
		newbases.append(b._impl_type)
		# and add the Decorator class
		newbases.append(Decorator)
		# now we'll have to make sure the dict of the new class shows the 
original base class
		# (which has been removed) as the implementation class
		dct[b.__name__] =  b._impl_type
		# since we have added a Decorator class, we ought to get rid of it
		# through the DecoratorType metaclass
		r = DecoratorType.__new__(cls, name, tuple(newbases), dct)
		
		return r

class DecoratorType(type):
	def __new__(cls, name, bases, dct):

		# if the first class is DecoratorDummy, then we're handling the
		# Decorator class, which is not supposed to be modified
		if bases[0] is DecoratorDummy:
			return type.__new__(cls, name, bases, {})
		
		# if one of the bases is the Decorator class
		b = [x for x in bases]
		if Decorator in b:
			# create a new impl type which inherits from every but the decorator 
class
			b.remove(Decorator)
			
		impl_type = type('%sImpl'%name, tuple(b), dict(dct))
		# make the returned type no longer a DecoratorType, but rather a 
normal type
		# Types which inherit from a class which inherited from Decorator, 
will thus
		# *not* be put through this metaclass.
		#dectype = type.__new__(type, name, tuple(b), {'_impl_type' : impl_type })
		dectype = type.__new__(InheritedDecoratorType, name, tuple(b), 
{'_impl_type' : impl_type })
		
		# update the old class to implement this implementation
		def __init__(self, *args, **dargs):
			new_impl = impl_type(*args, **dargs)
			super(dectype._impl_type, new_impl).__init__(*args,
															 **dargs)
			object.__setattr__(self, '_impl', new_impl)
		def decorator(self):
			return object.__getattribute__(self, '_impl')
		def __getattribute__(self, attr):
			if attr=="decorator":
				return object.__getattribute__(self, 'decorator')
			
			# if we have a specified method inside the decorator().__decorate__ var,
			# then call decorator().attr(), otherwise proxy the call
			d = object.__getattribute__(self, 'decorator')()
			if attr in d.__decorate__:
				return getattr(d, attr)
			return getattr(d.getParent(), attr)
		dectype.__init__ = __init__
		dectype.decorator = decorator
		dectype.__getattribute__ = __getattribute__
		
		return dectype

class Decorator(DecoratorDummy):
		__metaclass__ = DecoratorType

class Window(object):
	def __init__(self, parent):
		print "Window::__init__(%s)"%self
		self._parent = parent
	
	def setParent(self, parent):
		self._parent = parent
	
	def getParent(self):
		return self._parent

class Textarea(Window):
	def draw(self):
		print "Textarea::draw()"

class HBar(Decorator, Window):
	__decorate__ = ["draw"]
	def __init__(self, parent):
		print "HBar::__init__(%s)"%self
		Window.__init__(self, parent=parent)
		
		self._progress = 0.0
		
	def setProgress(self, p):
		print "setting progress to %s"%p
		self._progress= p
		
	def getProgress(self):
		return self._progress
	
	def draw(self):
		self.getParent().draw()
		print "HBar::draw()"
		
class HBarTrue(HBar):
	# HBar's bases: Window (Decorator removed by metaclass)
	# HBar's methods: __init__, decorator, __getattribute__
	# everything else is inside decorator()
	# we thus need to make calls to self within HBarTrue,
	# calls to self.decorator() - this is not possible
	# Otherwise we could also let HBarTrue inherit from HBarImpl,
	# however then a call to HBar.__init__ would be invalid inside
	# HBarTrue.__init__ unless we specify HBar internally as being HBarImpl
	# - this however is not possible
	# if we inherit from HBarImpl, then we no longer have the decorator
	# functionality. We'd thus have to include Decorator in the list of bases
	
	# Inherit normally from HBar and not Decorator.
	# Move all methods from HBarTrue to HBar.decorator()
	# create a custom __init__ method which calls HBar.decorator().__init__
	
	def __init__(self, parent):
		print "HBarTrue::__init__(%s)"%self
		for each in dir(self):
			print each
		HBar.__init__(self, parent)
		
		self.setProgress(0.0)

myTextarea = Textarea("main.parent")
myTextarea.draw()
myTextarea = HBarTrue(myTextarea)
myTextarea.draw()
myTextarea.decorator().setProgress(100.0)
------------------------------------------
The code above works only if I don't inherit from HBar like I did.
As it is now, the HBar class, which inherits from Decorator and Window, 
is going to be manipulated by the metaclass. During this process the 
Decorator base-class is removed, the implementation of HBar moved into 
_impl_type and the methods __init__, decorator and __getattribute__ are 
being assigned to the new class.
Everything works so far if I don't subclass HBar.
If I do subclass HBar, then the subclass goes through the second 
metaclass (InheritedDecoratorType). In there I replace the base class 
HBar with HBarImpl and Decorator. This way the subclass inherits the 
implementation of HBar and through the Decorator class then the subclass 
goes through the same metaclass magic as HBar in the first step. Of 
course however, since HBarTrue is no longer a subclass of HBar (since 
that baseclass has been removed), the HBar.__init__ method won't accept 
the non HBar self parameter.

Now the reason why I'm using decorators, is because I want to be ably to 
add the functionality dynamicly - without the need of construction 
classes for the different possibilities. Composite pattern does not help 
in this case, since I lose the ability to choose in what order I call 
the decorator's and the decorated's methods.

I'll just keep trying. Any input greatly appreciated.

Regards,
Thomas K.



From VBG at extnet.net  Thu May 29 16:26:52 2008
From: VBG at extnet.net (Hung Well (no comma))
Date: Thu, 29 May 2008 15:26:52 -0500
Subject: so funny...
References: <620361d6-5eb2-482a-8e28-4b2e9c906ece@26g2000hsk.googlegroups.com>
Message-ID: <fkE%j.3193$Q57.450@nlpi065.nbdc.sbc.com>


"John" <fariba42064 at yahoo.com> wrote in message 
news:620361d6-5eb2-482a-8e28-4b2e9c906ece at 26g2000hsk.googlegroups.com...
> http://sitscape.com/topic/funny
>
> Just keep hit the "Surprise->" button there for amazing fun.
> Click on "channel" will show you other topics, lots of fun!


You tickle easy.

--WH 




From bruno.desthuilliers at gmail.com  Mon May 19 16:42:16 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:42:16 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>

On 19 mai, 20:07, Vicent Giner <vgi... at gmail.com> wrote:
> On May 19, 6:11 pm, Henrique Dante de Almeida <hda... at gmail.com>
> wrote:
>
(snip)
> >  The situation would be simpler if there were good well-known toolkits
> > for optimization in python (like numpy for matrix operations), but
> > that's not the case.
>
> Are there such toolkits in other languages? I am not sure they exist
> in C, for example.

Well... They do - they are called 'C compilers' !-) As Roel Schroven
mentioned - and he is at least partially right on this point - C has
been designed to make optimizing C compiler not to hairy to write.

> By the way, is it possible (and easy) to call a C function from a
> Python program??

Possible, yes, indeed. Easy depends on your definition of easiness,
but  going down to C for computation-heavy performance-critical parts
of a program or library is not that uncommon.


From skanemupp at yahoo.se  Tue May 13 14:41:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:41:58 -0700 (PDT)
Subject: variable scope question?
Message-ID: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>

http://mail.python.org/pipermail/python-list/2003-October/233435.html

why isnt it printing a in the second(second here, last one in OP)
example before complaining?

def run():
  a = 1
  def run2(b):
    a = b
    print a
  run2(2)
  print a
run()

def run():
  a = 1
  def run2(b):
    print a
    a = b
  run2(2)
  print a
run()


From GustavoTabares at gmail.com  Mon May 12 10:41:19 2008
From: GustavoTabares at gmail.com (GustavoTabares at gmail.com)
Date: Mon, 12 May 2008 07:41:19 -0700 (PDT)
Subject: Removing option from optparse
Message-ID: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>

Hello,

I'm trying to figure out if the following is a bug or if I'm using the
remove_option in the wrong way.

#!/usr/bin/env python
import optparse
parser = optparse.OptionParser()
parser.add_option("--test", help="This is a test option")
parser.remove_option('--test')
print parser.parse_args()

this will output:
(<Values at 0x6beb8: {'test': None}>, [])

If you execute the --help on the file above you will not see --test as
expected. I'm curious as to why parse_args is still returning this as
an option.

Thanks,
Gustavo


From kamhung.soh at gmail.com  Thu May  1 02:00:33 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 01 May 2008 16:00:33 +1000
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23>
Message-ID: <op.uagoa7vhev04yd@melwxp23>

On Wed, 30 Apr 2008 17:12:15 +1000, Kam-Hung Soh <kamhung.soh at gmail.com>  
wrote:

> On Wed, 30 Apr 2008 15:27:36 +1000, Raymond <not-for-mail at sonic.net>  
> wrote:
>
>> For some reason I'm unable to grok Python's string.replace() function.
>> Just trying to parse a simple IP address, wrapped in square brackets,
>> from Postfix logs. In sed this is straightforward given:
>>
>> line = "date process text [ip] more text"
>>
>>   sed -e 's/^.*\[//' -e 's/].*$//'
>>
>> yet the following Python code does nothing:
>>
>>   line = line.replace('^.*\[', '', 1)
>>   line = line.replace('].*$', '')
>
> str.replace() doesn't support regular expressions.
>
> Try:
>
> import re
> p = re.compile("^.*\[")
> q = re.compile("].*$")
> q.sub('',p.sub('', line))
>

Another approach is to use the split() function in "re" module.

import re
re.split("[\[\]]", line)[1]

See http://docs.python.org/lib/node46.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From netizen at gmx.de  Fri May 23 10:59:17 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 16:59:17 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
	<5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>
	<Xns9AA79A81E3F08duncanbooth@127.0.0.1>
Message-ID: <4jmd34h5cjigp50uvk0p14td5sjqiokgj2@4ax.com>

.oO(Duncan Booth)

>Michael Fesser <netizen at gmx.de> wrote:
>
>> The only little problem is that PHP doesn't have native Unicode
>> support yet, which will change with PHP 6. But of course you can still
>> use UTF-8 without any trouble, I do it all the time. You just have to
>> keep in mind that many string functions still work on bytes, not on
>> characters, but this can almost always be solved with the Multibyte
>> extension. Apart from that there's no problem with PHP and UTF-8. It's
>> also easily possible to convert between various encodings using the
>> iconv extension. 
>> 
>As I remember it the problem was that the data was stored in a database 
>in latin-1 but the HTML page had to be in utf-8 (because the rest of the 
>server and therefore all the page skins were already in utf-8). In 
>python that would be a trivial conversion but I was told that in PHP it 
>wasn't.

It would have been trivial in PHP as well, assuming the DB was MySQL,
which could have done this conversion automatically when sending the
data to the script.
 
>But one small example isn't really the point. It's that the whole way 
>Python works seems *to me* to make sense and (mostly) fits together 
>cleanly and consistently. YMMV

Fair enough. The nature of PHP as being a grown language has its
advantages, but also a lot of drawbacks, which are hard to solve.

Micha


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:28:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:28:33 +0200
Subject: named tuple mutability
In-Reply-To: <873aokzgs9.fsf@benfinney.id.au>
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
Message-ID: <482be615$0$10798$426a34cc@news.free.fr>

Ben Finney a ?crit :
> "bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:
> 
>> On 14 mai, 18:20, castiro... at gmail.com wrote:
>>> I'm concerned over the future of Python.  Should tuples be named?
>> Obviously not, unless they should.
> 
> Clearly they should, unless not.
> 
May we agree to disagree here - unless we don't ?


From skanemupp at yahoo.se  Mon May  5 07:57:25 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 04:57:25 -0700 (PDT)
Subject: confused about self, why not a reserved word?
Message-ID: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>

class Foo(object):
	def Hello(self):
		print "hi"

object is purple, ie some sort of reserved word.

why is self in black(ie a normal word) when it has special powers.
replacing it with sel for example will cause an error when calling
Hello.


From efurman at admailinc.com  Mon May 19 13:42:58 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Mon, 19 May 2008 09:42:58 -0800
Subject: Dbase / foxpro files
In-Reply-To: <1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>	<mailman.1235.1210959453.12834.python-list@python.org>
	<1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>
Message-ID: <4831BC22.1040809@admailinc.com>

Johny wrote:

>Thanks for your reply.Is it possible to delete a record by using the
>module?
>Thanks
>L>
>--
>http://mail.python.org/mailman/listinfo/python-list
>  
>
It is possible with mine.  To clarify an earlier post, my module is for 
dBase III and VFP 6.0 files only (those were the only two I needed :).

Hope this helps.
--
Ethan



From darcy at druid.net  Thu May  8 16:14:37 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 8 May 2008 16:14:37 -0400
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <20080508161437.531ab1d9.darcy@druid.net>

On Thu, 8 May 2008 11:02:14 -0500
"Maryam Saeedi" <ma.saeedi at gmail.com> wrote:
> I was wondering if you know how can I run a python code once every five
> minutes for a period of time either using python or some other program like
> a bash script.

Use cron.

> I have asked this question before and some of you answered me but I still
> have problem. Most of the answers was to use cron and crontab which works on
> my computer but not if I want to do it on department's computer since I do
> not have permission to change those files. Is there any other way which does
> not need administrator permission?

Same answer.  Download the source for cron from somewhere (NetBSD,
FreeBSD, Linux, whatever), compile it and run it yourself.  You can't
run setuid but if you want something that acts like cron, cron fits the
bill.  Ain't open source wonderful?  :-)

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From skanemupp at yahoo.se  Mon May  5 09:37:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 06:37:35 -0700 (PDT)
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
Message-ID: <9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>

sorry i noticed now a little error, i was playing around a lot and saw
that on the sel-example i had then called foo.hello() instead of
foo.Hello().


but it was an informing error now i egt it. was wondering about self
anyway so thanks for clearing it up.


but it still is a bit confusing that u can pass with any word.
wouldnt:


class Foo(object):
	def Hello():
		print "hi"


make more sense?

the class-thing seems inside out somehow in python. if im doing
foo.Hello() im already saying that im using the class foo because i
did foo=Foo() before and then still when calling Hello() i am
invisibly passing the class itself a s a parameter by default?
just seems backwards and weird.


From gagsl-py2 at yahoo.com.ar  Fri May  9 02:55:27 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:55:27 -0300
Subject: Bug in email.utils, parseaddr
References: <fb5d57bf-1840-43c7-8b31-2abd2dd88e9b@f63g2000hsf.googlegroups.com>
Message-ID: <op.uavj6pwpx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 02:55:46 -0300, Roopesh <roopesh.raj at gmail.com>  
escribi?:

> I tried using parseaddr of email.utils, but it gave the following
> result when the name had a comma inside.
>
>>>> e = 'K,Vishal <vishal at someaddress.biz>'
>>>> from email.utils import parseaddr
>>>> parseaddr(e)
> ('', 'K')

That's an invalid address. A comma "," is a special character and it  
cannot happen inside an atom, it must be quoted. See section 3.4 in  
RFC2822 <http://www.faqs.org/rfcs/rfc2822.html>

-- 
Gabriel Genellina



From zaphotbretzel at yahoo.com  Mon May 19 11:06:47 2008
From: zaphotbretzel at yahoo.com (zaphotbretzel at yahoo.com)
Date: Mon, 19 May 2008 08:06:47 -0700 (PDT)
Subject: installing MySQLdb module
References: <80f805f0-6829-4da3-bfb4-79875bb16114@a22g2000hsc.googlegroups.com>
Message-ID: <75c38402-41a5-480b-b65d-463c8cc43fc4@25g2000hsx.googlegroups.com>

Hi Rafael,

> I googled around and people say you need the "-dev" package of mysql
> in order to have the C headers...where can you download this for mac
> os?
> PS I am running XAMPP (http://www.keitr.com/tutorials/xampp) if that
> changes anything

Ok, here my solution to the problem (Mac OS X 10.4, Xampp and MySQLdb)

1) install Xcode from apple (for gcc, need free account for that,
http://developer.apple.com/)
2) get Mac binary tar from MySQL (http://dev.mysql.com/downloads/mysql/
5.0.html#macosx)
3) edit site.cfg (mysql_config = /Applications/xampp/xamppfiles/bin/
mysql_config)
4) copy include dir from MySQL package to /Applications/xampp/
xamppfiles/include/mysql

I bet downloading the same version from MySQL as installed from Xampp
could help.
And yes, you only need the include folder from the MySQL binary
package, do not install it.

Peace,
     Zaphot


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:23:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:23:40 -0300
Subject: how to pass C++ object to another C++ function via Python function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
	<136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>
Message-ID: <op.uajppqc7x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 00:26:38 -0300, grbgooglefan <ganeshborse at gmail.com>  
escribi?:

> On Apr 22, 7:54?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>>
>> If you have a C function that receives a PyCObject, just include the ?
>> relevant headers (cobject.h) and you can retrieve the original pointer ?
>> using PyCObject_AsVoidPtr:
>>
>
> This works. But only once, means if I try to use this object second
> time in Python function it causes crash.
>
> What I am doing in my program is that I am putting STL map in a
> structure & passing that structure as object to a Python function
> alongwith other agurments of that Python function. This briefly as
> below:
>
> // In pyinterface.h file:---
> typedef hash_map<char*,int> Elements;
> typedef hash_map<char*,Elements*,StringHash,eqstr>
> PerExchGroupsElementsTable;
> typedef struct capsule {
>         PerExchGroupsElementsTable* refgrps;
> } *pcapsule;
>
> // In pyinterface.cpp file:---
> numvars = // value set depending on number of variables of that python
> function
> PyObject *pTuple = PyTuple_New(numvars);
>
> // Set variables as below:
> for(nCtr = 0; nCtr < numvars; nCtr++){
>      slot = prul->pVarLst[nCtr].slot;
>      ndtyp = ordvars[slot].dtype;
>      switch(ndtyp){
>        case(INT_T):
> PyTuple_SetItem(pTuple,nCtr,PyInt_FromLong(ordvars[slot].nvalue));
>            break;
>        case(FLOAT_T):
> PyTuple_SetItem(pTuple,nCtr,PyFloat_FromDouble(ordvars[slot].fvalue));
>            break;
>        case(STRING_T):
> PyTuple_SetItem(pTuple,nCtr,PyString_FromString(ordvars[slot].cvalue));
>            break;
>        default:
>            printf("\nUnknown data type [%d] for %s\n",ndtyp,prul-
>> pVarLst[nCtr].var);
>            bUnknownDataType = true;
>            break;
>      }
>      if(bUnknownDataType){
>         ret = -1;
>         break;
>      }
> }
>
> // Then set the C++ object as below:
> if(ret == 0){
>     capsule grpob;
>     if(pGroups){
>       grpob.refgrps = pGroups; // pGroups is pointer to
> PerExchGroupsElementsTable map & is global.
>       int ret = PyTuple_SetItem(pTuple,
> (numvars-1),PyCObject_FromVoidPtr((void *)&grpob, NULL));
>     }

This look suspicious - what if !pGroups? You can't leave a tuple item  
uninitialized - if you create a tuple with PyTuple_New(3), then you have  
to fill the 3 items.
And beware of that local variable grpob - you're using a pointer to it,  
and it won't be valid when execution goes out of this block. You must  
ensure that nobody stores a reference to it.
And you should decref the tuple even if this block isn't executed.

>     PyObject *ptr = PyObject_GetAttrString(_pPyModule,fname);
>     if(PyErr_Occurred() || *ptr == NULL){
>         printf("PyObject_GetAttrString failed:%s",fname);
>         return;
>     }
>     if(!PyCallable_Check(*ptr)){
>        printf("%s not a callable Python code\n",fname);
>        Py_XDECREF(*ptr);
>        *ptr = NULL;
>        return;
>     }

All those *ptr should be ptr (the compiler should issue a lot of warnings,  
I presume?)

> What happens is that when Python function TSE581 gets called from my C
> Program via PyObject_CallObject (as shown at top of this post), co1
> function works fine & can access the map pointer properly.
> But when next function like1 gets called, crash happens.
>
> My queries are & things on which I need help are:
> 1) Is there anything wrong I am doing when I am passing the C-Object
> from my C++ code->Python -> C++ code again?

I see nothing obviously wrong, except the above notes. If you get warnings  
 from the C++ compiler, try to fix all of them.

> 2) Am I missing to increase or decrease the reference count somewhere.

In case of error you exit early but without releasing some existing  
objects. (Sometimes a goto statement *is* the right thing to do)

> 3) I dont want map pointer to be ever freed because it is Process
> level data structure & requried at every execution of these Python
> functions. How do I avoid its cleanup when it gets passed to Python &
> Python cleans up those objects.

Python will do nothing with the pointer inside a PyCObject - unless you  
want to, and pass a cleanup function as the second argument to the  
PyCObject constructor.

-- 
Gabriel Genellina



From dullrich at sprynet.com  Tue May 27 11:59:24 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 10:59:24 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
	<mailman.1649.1211900977.12834.python-list@python.org>
Message-ID: <dullrich-23C081.10592427052008@text.giganews.com>

In article <mailman.1649.1211900977.12834.python-list at python.org>,
 "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Tue, 27 May 2008 11:52:25 -0300, David C. Ullrich  
> <dullrich at sprynet.com> escribi?:
> 
> > Oh. Never mind the details, let's just say that having 2.3 and
> > 2.5 installed on the same machine can lead to confusion
> > about exactly which one you're running a script under.
> > Duh.
> 
> You might change the prompt; put these lines in your sitecustomize.py (or  
> create it if you don't have one):
> 
> import sys
> sys.ps1 = 'p23> '
> sys.ps2 = ' ... '

Thanks. I guess I should have included details that I thought
would be of no interest to save people time with replies.

The problem is that on the Mac in question Terminal thinks
python is 2.5 (as does Idle) while when I double-click on a
file in Finder it runs under python 2.3. In particular it
never happens that I'm running an interactive session under
2.3.

(No, I'm not saying that's a good setup - it's a mess. The
other Mac, at the office, is not such a mess, but I never
could get things like Idle to work under the Apple Python...)

> > Sorry. Thanks. I don't suppose that decorators are available
> > from __future__ somehow in 2.3?
> 
> No. But a decorator is only syntax sugar.
> 
> @decorator
> def f():
>    ...
> 
> is the same thing as:
> 
> def f():
>    ...
> f = decorator(f)
> 
> (just more convenient)

-- 
David C. Ullrich


From jamesd at echeque.com  Thu May 22 05:48:52 2008
From: jamesd at echeque.com (James A. Donald)
Date: Thu, 22 May 2008 19:48:52 +1000
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
Message-ID: <g2ga34h4o90us3dvush5tf38pnkg78neh8@4ax.com>

On Fri, 16 May 2008 11:21:39 -0400, "inhahe" 
<inhahe at gmail.com> wrote:
> They say that the C++ optimizer can usually optimize 
> better than a person coding in assembler by hand can, 
> but I just can't believe that, at least for me, 
> because when I code in assembler,

if one hand compiles C++ into assembler, the result will 
doubtless be crap compared to what the compiler will 
generate.  If, however, one expresses one's algorithm in 
assembler, rather than in C++, the result may well be
dramatically more efficient than expressing one's
algorithm in C++ and the compiler translating it into
assembler.  A factor of ten is quite common.

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From krumblebunk at gmail.com  Tue May  6 11:20:37 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 08:20:37 -0700 (PDT)
Subject: Reversing a dict?
Message-ID: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>

Hi - further to my earlier query regarding partial matches (which with
all your replies enabled me to advance my understanding, thanks), I
now need to reverse a dict.

I know how to reverse a list (with the reverse method - very handy),
but it doesn't seem possible to reverse a dict.

I suspect what I need to do is somehow go from:

thelist=list(thedict)
thelist.reverse()
thedict=dict(thelist)

Does anyone know how to convert / or reverse a dict?

thanks

kb.





From duncan.booth at invalid.invalid  Sun May 11 15:50:34 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 19:50:34 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <Xns9A9BD40562CBFduncanbooth@127.0.0.1>

bc90021 <python at bc90021.net> wrote:

> The error message was at the top of the thread (am I incapable of
> posting it, or are you incapable of following a thread?), but here it
> is again: 
> 
> IOError: [Errno 2] no such file u'tempfileName'

So which was it? At the top of the thread you said it was:

IOError: [Errno 2] no such file u'fileName'

How about posting the exact error message you got, including all of the 
traceback and the complete original code: even when you posted "Here's the 
thread class" you actually posted a modified version of your thread class 
(with sarky comments added even if nothing else was changed).

If you post complete code and the full traceback then you'll probably get a 
quick and accurate response telling you what the problem is. If you 
continue to paraphrase and post bits and pieces you'll continue to get 
random guesses.



From bignose+hates-spam at benfinney.id.au  Sun May 11 23:46:07 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 13:46:07 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
Message-ID: <87zlqw6v7k.fsf@benfinney.id.au>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Yves Dorfsman <yves at zioup.com> writes:
> > I know you can't assign anything to None, but I'm sure you get what I
> > mean, a special keyword that means I don't care about this value.

Snap. This topic was raised today in another thread.

> You can just use a variable name than you ignore. It's traditional
> to use _ but it's not a special keyword, it's just a another
> variable name:
> 
>    y, _, d, _, _, _, _, _, _ = time.localtime()

It's a terrible name for that purpose, since it doesn't indicate the
intention explicitly, and it's already overloaded in meaning by a
pre-existing convention (ref. the 'gettext' module in Python and many
other languages).

Far better to use the name 'unused' as suggested by Carl Banks earlier
today.

(good sigmonster, have a cookie)

-- 
 \            "Choose mnemonic identifiers. If you can't remember what |
  `\                mnemonic means, you've got a problem." ?Larry Wall |
_o__)                                                                  |
Ben Finney


From stefan_ml at behnel.de  Fri May  9 11:50:14 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 17:50:14 +0200
Subject: A question about python and xml
In-Reply-To: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
References: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
Message-ID: <482472B6.603@behnel.de>

Holden wrote:
> I want to make a web site that uses the python programming
> language which I am VERY new at. This website would store simple data
> such as names in a form. At first I wanted to use mysql to store the
> data but I want to export the data using xml.
> 
> So say if a user logged in they would be able to store there basic
> information in an xml file and download it whenever. Is that possible
> using XML and Python. I am sorry if this post doesn't make much sense
> but any advice would be greatly appreciated. You can also e-mail me if
> you need further information or clarification.

Generating XML from your data shouldn't be too hard once it's in a database.
The harder part is getting it in there through a web interface. I would look
at a dedicated web framework like Django first:

http://www.djangoproject.com/

Stefan


From skanemupp at yahoo.se  Fri May 16 09:04:16 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:04:16 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
Message-ID: <9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>

On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
> Christian Heimes wrote:
> > globalrev schrieb:
> >> cust1 = customer.__init__('12',['1','435','2332'])
>
> > cust1 = customer('12',['1','435','2332'])
>
> ... and before that
>
> from customer import customer
>
> Peter

why do i have to write that?

if i do import customer im importing everything no?

but youre right it doesnt work unless i do, i just dont get why.


From arnodel at googlemail.com  Thu May 15 02:09:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 07:09:31 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
Message-ID: <m2k5hw9jz8.fsf@googlemail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
>> > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> >> __new__ is a static method!
>>
>> > __new__ is a special-cased staticmethod that  1/ must not be declared
>> > as such and 2/ takes the class object as first args. As far as I'm
>> > concerned, it's semantically a classmethod.
>>
>> It's a static method!
>
> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
> a staticmethod object. What I say is that
> 1/ it's special-cased since you don't *explicitely* declare it as a
> staticmethod
> 2/ it behaves just like a classmethod, since it takes the class as
> first argument.
>
> IOW, I'm talking about semantic, not implementation.

... and I was being facetious, not serious :)

-- 
Arnaud


From kyosohma at gmail.com  Fri May 16 09:22:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:22:01 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
	<CLudna01D6ocGrDVnZ2dnUVZ_u-dnZ2d@comcast.com>
Message-ID: <e8f5e837-6791-4598-8ddc-c2f048d216e9@b1g2000hsg.googlegroups.com>

On May 16, 8:09?am, Larry Bates <larry.ba... at websafe.com`> wrote:
> Mike Driscoll wrote:
> > On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> >> Mike Driscoll wrote:
> >>> Hi,
> >>> I've had this niggling issue from time to time. I want to create a
> >>> shortcut on the user's desktop to a website that specifically loads
> >>> Firefox even if Firefox is not the default browser.
> >>> I usually use COM as it allows very specific settings of the shortcut,
> >>> such as the Working Directory and the Target Path. However, the
> >>> following will not work for some reason:
> >>> <code>
> >>> import win32com.client
> >>> import winshell
> >>> shell = win32com.client.Dispatch('WScript.Shell')
> >>> userDesktop = winshell.desktop()
> >>> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> >>> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> >>> https:\www.myCompanyWebsite.com\auth\preauth.php'
> >>> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> >>> Firefox'
> >>> shortcut.save()
> >>> </code>
> >>> This creates the following target path (which doesn't work):
> >>> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> >>> \www.myCompanyWebsite.com\auth\preauth.php"
> >>> If I leave the website off, it works. If I leave the path to Firefox
> >>> out, it works too. Is there another method I can use other than
> >>> creating the shortcut by hand and using the shutil module?
> >>> Thank you for any ideas.
> >>> Mike
> >> Either you copied wrong or the problem is:
>
> >> "C:\"C:\Program Files...
>
> >> Note the C:\ is specified twice in the string. ?I think it should read:
>
> >> ?> "C:\Program Files\Mozilla Firefox\firefox.exe" https:
> >> ?> \www.myCompanyWebsite.com\auth\preauth.php"
>
> >> -Larry
>
> > Yeah, I know that it's in there twice and that that is the problem.
> > But I'm not causing that extra C:\. I run it exactly as above and that
> > is what I get for the output. I think it's the COM object. Maybe I
> > better just re-post this to the PyWin32 list...
>
> > Thanks,
>
> > Mike
>
> I use Inno Setup on most of my applications and use it to create my desktop,
> quicklaunch and Start shortcuts. ?Would that be an option for you?
>
> -Larry

I use Inno too for my applications. However, in this case, I have to
create the shortcut as part of the login process based on what group
the user is in. Chris's solution worked for my needs and I think
Gabriel's will work too, if I figure it out.

Mike


From arnodel at googlemail.com  Mon May 12 08:59:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 05:59:58 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> 
	<48283881@news.mel.dft.com.au>
Message-ID: <bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>

On May 12, 1:30?pm, John Machin <sjmac... at lexicon.net> wrote:
> Duncan Booth wrote:
[...]
> > I think the variant I came up with is a bit clearer:
>
> > for i in range(1,101):
> > ? ?print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>
> More than a bit clearer, IMO. How about
> ? ? ?print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
> (or perhaps
> ? ? ?print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
> to save looking up the precedence rules) ?

Stuff clarity!  How about

for i in xrange(1, 101):
    print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i

--
Arnaud



From wizzardx at gmail.com  Sat May  3 15:56:38 2008
From: wizzardx at gmail.com (David)
Date: Sat, 3 May 2008 21:56:38 +0200
Subject: State machine Example in Python
In-Reply-To: <18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>
References: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
	<18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>
Message-ID: <18c1e6480805031256i597eaa1jb9dbcffecee9c169@mail.gmail.com>

>  There's plenty of results. Be more specific if you can't get what you
>  want from Google.

You'll probably find what you're looking for here:

http://wiki.python.org/moin/FiniteStateMachine

David.


From alokkat at gmail.com  Wed May 28 09:31:22 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 09:31:22 -0400
Subject: Struct usages in Python
In-Reply-To: <c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
Message-ID: <e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>

I am getting following error when tried as you suggested.

self.event = []  #Create an empty list, bind to the name "event" under the
"self" namespace
           self.event.append(Event())   #Create an event object and append
to the end of the list

*class Event():
                ^
SyntaxError: invalid syntax*


On Wed, May 28, 2008 at 1:07 AM, Patrick Mullen <saluk64007 at gmail.com>
wrote:

> I don't know if this will go through (my posts seem to have become blocked
> lately), but I'll give it a shot anyhow.
>
> You seem to be under a misconception that a python list is similar to a
> list in say, Java or other languages that have a rigid idea of variables and
> types.  In python, a list is a list of objects - any type of object can be
> stored in a list.  Just as you don't declare types for variables, you also
> don't declare types for lists.  Here is your modified code:
>
> class Event():
>    def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
> clrTime=""):
>      self.cameraEventType = cameraEventType
>      self.zone = zone
>      self.setDay = setDay
>      self.setTime = setTime
>      self.clrTime = clrTime
>
> class EventTimeFilter:
>    def __init__(self):
>            self.event = []  #Create an empty list, bind to the name "event"
> under the "self" namespace
>            self.event.append(Event())   #Create an event object and append
> to the end of the list
>
>
> Python won't stop you from putting other objects into self.event besides
> Event objects, but in practice this isn't often an issue.  The real benefit,
> is if you subclass event or make some other type of object that is similar
> to events, with maybe some of the same fields, you can still store them in
> the list and it will play along with the rest of your code.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From castironpi at gmail.com  Mon May 12 20:32:48 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 17:32:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>

On May 12, 6:39?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language. ?That's also one of the design goals of
> Flaming Thunder athttp://www.flamingthunder.com/?, which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

Can you render some furniture for me... to try to see some human
posture to lowest energy levels.


From afrobeard at gmail.com  Thu May 15 17:25:29 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 14:25:29 -0700 (PDT)
Subject: FTP upload issue
References: <44eede8c-05b5-441d-9207-210074e55f8f@f36g2000hsa.googlegroups.com>
Message-ID: <a37704b9-cf54-4235-b42d-3be27003926a@24g2000hsh.googlegroups.com>

First of all, it would be better to use:-

ftp.storlines("STOR " + remoteFileName, open(localFileName, "rb"))

rather than:-

ftp.storlines("STOR" + filename, file(filename))

Since the Python Documentation has this to say for open(): [Although ]

When opening a file, it's preferable to use open() instead of invoking
this constructor directly. file is more suited to type testing (for
example, writing "isinstance(f, file)").

Secondly Referring to another mail thread :
http://mail.python.org/pipermail/tutor/2006-February/045347.html
Quoting Kent :

fname should be just a bare name, e.g. 'mac.info2.txt'. You have to
ftp.cwd()
to the correct directory yourself. If it does not exists, create a tmp
directory. You're currently passing /tmp/mac.info2.txt to the ftp.

This should hopefully solve your problem.

P.S. I personally used to use ftputil[Really easy to use] and now I
use twisted. These libraries abstract a lot of stuff out for you.

On May 16, 1:25?am, davidj411 <davidj... at gmail.com> wrote:
> I am having difficulty uploading a text file using Python 2.5 on MAC
> OSX.
>
> SCRIPT
>
> filename='/tmp/mac.info2.txt'
> fh=open(filename,'w')
> fh.write('yes, i have a mac but don't hold that against me - just
> example data')
> fh.close()
>
> from ftplib import FTP
> 'host, username, and password are string variables that have already
> been defined.
> ftp = FTP(host)
> ftp.login(username,password)
> 'so far, logged in, all is well , error is on next line.
>
> ftp.storlines("STOR" + filename, file(filename))
> ftp.quit()
>
> What am i doing wrong? ?the file DOES exist, the path is correct, and
> the file ?was closed after being written. file(filename) should open
> it again for the upload?
>
> http://www.python.org/doc/lib/ftp-objects.htmlsays that the command
> should be an appropriate "STOR" command: "STOR filename". file is an
> open file object which is read...
>
> ERROR
> ? File "mac.inventory.py", line 44, in <module>
> ? ? ftp.storlines("STOR " + filename, file(filename))
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 437, in storlines
> ? ? conn = self.transfercmd(cmd)
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 356, in transfercmd
> ? ? return self.ntransfercmd(cmd, rest)[0]
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 327, in ntransfercmd
> ? ? resp = self.sendcmd(cmd)
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 241, in sendcmd
> ? ? return self.getresp()
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 216, in getresp
> ? ? raise error_perm, resp
> ftplib.error_perm: 550 /tmp/mac.info2.txt: The system cannot find the
> path specified.



From arnodel at googlemail.com  Mon May 12 04:57:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:57:13 -0700 (PDT)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
Message-ID: <c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>

On May 12, 7:31?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Yves Dorfsman <y... at zioup.com> writes:
> > Is there anyway to tell python I don't care about a value ?
>
> > Say I want today's year and day, I'd like to do something like:
>
> > import time
> > y, None, d, None, None, None, None = time.localtime()
>
> > I know you can't assign anything to None, but I'm sure you get what I
> > mean, a special keyword that means I don't care about this value. In
> > this particular case, there's got to be a better way than:
>
> > d = time.local()
> > y = d[0]
> > d = d[1]
>
> I use Paul Rubin's solution (which is frown upon by many:), but it's
> true it would be nice for tuples to have something like an extract()
> method:
>
> y, d = time.localtime.extract(0, 2)
>
> Where
>
> ? ? mytuple.extract(i1, i2, i3...)
>
> would mean:
>
> ? ? tuple(mytuple[i] for i in (i1, i2, i3...))
>
> Or perhaps allow indexing by tuples:
>
> ? ? mytuple[i1, i2, i3...]
>
> --
> Arnaud

here is a very sophisticated implementation :)

>>> def extract(indices, seq):
...     return tuple(seq[i] for i in indices)
...
>>> y, d = extract((0, 2), time.localtime())
>>> y, d
(2008, 12)

--
Arnaud



From paul at boddie.org.uk  Wed May  7 06:56:30 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 03:56:30 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>

On 6 Mai, 19:22, vivai... at gmail.com (Ville M. Vainio) wrote:
> Excuse the long post.

Excuse the cherry-picking from your long post. ;-)

[...]

> Also, you can do what Paul Boddie did - fork the project, or maintain
> patches that are under LGPL. With a liberal license, you have that
> privilege.

Sure, my patches were LGPL, if you'd like to consider it that way, but
I have to point out that the derived work maintained by me became LGPL
as a result - I wasn't offering the non-Paul Boddie version under the
original licence as well. Now, I did leave a fair amount of
information about the heritage of the code, so that anyone who is
scared of the LGPL could just go and get the original work, but that
is probably your only viable option if you want to revert to the old
licensing.

[...]

> I don't think BSD/MIT like license really annoys anyone. Think python
> here ;-)

As some have pointed out, it can discourage people from contributing.
I've said many times before that some companies might not contribute
to a permissively licensed project because their competitors could
leverage the benefit in proprietary software, and I consider Linux and
the involvement of companies like IBM to be a reasonable example of
this.

[...]

> Not at all, it's a very practical thing related to all the
> intellectual property lawyerage in corporate setting. With Vellum, it
> doesn't matter a lot because most of the tools are only used in-house,
> but it would still be nice if you could just grab the code from
> somewhere without having to think about license at all, or considering
> whether any of this would ever be needed for something that involves
> selling stuff under proprietary license.

You can almost never just "grab the code from somewhere without having
to think about [the] license" since even permissive licences typically
have a list of conditions that must be observed. Certainly, they
aren't as demanding as those in copyleft licences, but by not
observing them you are infringing someone's copyright.

[...]

> Also, for some reason, GPL is used for evil (dual-licensing schemes -
> make money but still gain the open source mindshare, and possibly rack
> up free contributions to something that is your *commercial product*)
> more often than it's used for good (gcc, Linux kernel - prevent IP
> exploitation and ensure that all improvements are freely accessible).

The whole "evil" aspect of dual-licensing schemes is mostly to do with
copyright assignment (or the contribution agreement), not licensing,
although the licences typically employed obviously prevent the wider
community from making proprietary versions of the software, thus
creating the conditions for a dual-licensing business. That said, it's
easy to refuse to play along with such schemes if you're motivated:
just don't agree to assign your copyright to someone else, or don't
license your contributions under permissive licences (which
interestingly takes us back to the issue of Python contributions and
the associated list of acceptable licences).

These days, some companies are getting a lot of bad publicity about
their project governance: Sun seem to be getting continuous criticism
about the management of OpenOffice.org, and now that they've picked up
MySQL, they'll presumably be the target of criticism by people who had
to sign over their ownership of patches in order to feed the MySQL
corporate machine. But again, this isn't a sign that the licence was
the problem: it's what people were asked to do with the copyright
which effectively negated the benefits of the licence for those
wanting to keep the software free and open.

Paul


From arnodel at googlemail.com  Tue May 13 02:07:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 07:07:15 +0100
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
	<c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>
	<mailman.1005.1210632251.12834.python-list@python.org>
Message-ID: <m2lk2eivos.fsf@googlemail.com>

"Terry Reedy" <tjreedy at udel.edu> writes:

> "Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
> news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...
>
> here is a very sophisticated implementation :)
>
>>>> def extract(indices, seq):
> ...     return tuple(seq[i] for i in indices)
> ...
>>>> y, d = extract((0, 2), time.localtime())
>>>> y, d
> (2008, 12)
>
> ===================
> Or a generator version:
>
> # 3.0
> def extract(iterable, indexes):
>     # assume indexes are all legal
>     enext = enumerate(iterable).__next__
>     i,item = enext()
>     for index in indexes:
>         while i < index:
>             i,item = enext()
>         yield item
>
> import time
> print(list(extract(time.localtime(), (0,2))))
>
> #prints [2008, 12] 

but extract('python', (3, 1)) won't work!

-- 
Arnaud


From mdw at distorted.org.uk  Tue May 13 06:20:42 2008
From: mdw at distorted.org.uk (Mark Wooding)
Date: Tue, 13 May 2008 10:20:42 +0000 (UTC)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <87zlqw6v7k.fsf@benfinney.id.au>
Message-ID: <slrng2iqrq.ihm.mdw@metalzone.distorted.org.uk>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>> You can just use a variable name than you ignore. It's traditional
>> to use _ but it's not a special keyword, it's just a another
>> variable name:
>> 
>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>
> It's a terrible name for that purpose, since it doesn't indicate the
> intention explicitly,

There's a lot of tradition behind _ for this purpose, not just in
Python.  For example, pattern-matching function languages, like ML and
Haskell, have been using _ to mean `don't care' for a long time.

Just the fact that the name is repeated suggests that you don't care
about its value.  Besides, it's a good choice for other reasons:
because the symbol is short, the variables you do care about stand out
clearly.

> Far better to use the name 'unused' as suggested by Carl Banks earlier
> today.

Other traditional names are `hunoz', `hukairz' and (apparently) `huaskt.

But these have much more visual clutter than the humble _.  You actually
need to do reading to pick out the bindings which you /are/ interested
in.

-- [mdw]


From gagsl-py2 at yahoo.com.ar  Wed May 14 02:18:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 03:18:00 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk>
	<482a00a2@news.mel.dft.com.au>
	<249560b3-7dd8-4fc1-8c14-11bc98a105ca@c65g2000hsa.googlegroups.com>
Message-ID: <op.ua4rsaowx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 19:31:03 -0300, Mensanator <mensanator at aol.com>  
escribi?:

> Such as what's the voltage at point A?
>
>     +5v
>      |
>     220 ohm
>      |
>      +-- A
>      |
>     330 ohm
>      |
>    ground
>
> Would you be surprised at how many applicants couldn't
> figure that out because they forgot to bring their
> calculator?

<OT>
Just a few hours ago I was helping a high school boy (senior) with some  
chemistry homework. He actually had to use a calculator to evaluate  
120*1/1 (and didn't even noticed he got the "same" number until I told  
him!)
I hope he'll pass his test tomorrow...
</OT>

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Fri May  2 15:45:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:45:11 -0300
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <op.uajk5l1mx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 16:20:04 -0300, Brendan Miller <catphive at catphive.net>  
escribi?:

> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
>
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
>
> Is there a portable /dev/null somewhere in the standard library?

py> import os
py> print os.devnull
nul

(this is on Windows)

-- 
Gabriel Genellina



From spectrumdt at gmail.com  Thu May  8 11:29:33 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Thu, 8 May 2008 08:29:33 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
Message-ID: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>

Hello.

I am running Fedora Linux and KDE, using the Konsole command line.

When coding Python, I regularly make a bug causing my program to not
terminate. But how do I kill the non-terminating Python interpreter
without killing the entire Konsole?

The default way of killing the current process on the command line is
Ctrl+C, but that doesn't work with Python. Neither do the "terminate
task", "suspend task" or "interrupt task" commands (available from
right-click in Konsole).

So, can someone please help? How do I kill Python without having to
restart Konsole?

Thanks in advance.


From vivainio at gmail.com  Sun May 11 15:59:35 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 19:59:35 GMT
Subject: observer pattern  (notification chain synchronization)
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
Message-ID: <87tzh4wr12.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> Here is one way:
>
> - for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
> - as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
> - When it is ok, the fund notifies investors and resets all the
> ``reportreceived`` values.
>
> Is this sensible enough? What are standard and better ways?

You could explore the performance of popping items from the dict/set,
instead of toggling the value so to true. Once the dict is empty, you
are done. Of course the dict/set would be called
stocks_that_havent_reported, or a saner & shorter variant of that.

The idea here is that checking a dict/set for emptiness is
close-to-zero time operation.




From saptarshi.guha at gmail.com  Mon May 19 02:04:57 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Sun, 18 May 2008 23:04:57 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>

I should also mention that for some reason there are several binay
values popping in between for some reason. This behavior (for the
inputr stream) is not expected


> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
>
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
>
> However i get a 1 before all and a 4 just after \n and before the 6.
>
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?
>
> Thanks
> Sapsi



From gneuner2/ at /comcast.net  Fri May  9 17:56:48 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Fri, 09 May 2008 17:56:48 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>

On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
wrote:

>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>> >
>> > I don't think Xah is trolling here (contrary to his/her habit)
>> > but posing an interesting matter of discussion.
>>
>> It might be interesting in the abstract, but any such discussion, when
>> cross-posted to multiple language groups on usenet, will inevitably
>> devolve into a flamewar as proponents of the various languages argue
>> about which language better expresses the ideas being talked about.
>> It's like a law of usenet or something.
>>
>> If Xah wanted an interesting discussion, he could have posted this to
>> one language-neutral group such as comp.programming. He doesn't want
>> that - he wants the multi-group flamefest.
>
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 
>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.

The problem is that many initial posts have topics that are misleading
or simplistic.  Often an interesting discussion can start on some
point the initial poster never considered or meant to raise.

George
--
for email reply remove "/" from address


From piotr_chamera at poczta.onet.pl  Sat May 24 07:01:30 2008
From: piotr_chamera at poczta.onet.pl (Piotr Chamera)
Date: Sat, 24 May 2008 13:01:30 +0200
Subject: Storing objects in relational database
In-Reply-To: <d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
Message-ID: <g18su2$h6c$1@nemesis.news.neostrada.pl>

bruno.desthuilliers at gmail.com pisze:
> I don't know if you'd label it 'elegant', but as far as I'm concerned,
> storing serialized objects as blobs in a relational database is mostly
> non-sense. If I use a relational database, it's because it is a
> *relational* database. If you want an OODB, then we have the ZODB,
> Durus and a couple others.

It is sometimes convenient to store objects in mature relational 
database backend (reliability,  stability, support, tools,
replication, etc.). See latst efforts with RelStorage backend
for ZODB (http://wiki.zope.org/ZODB/RelStorage) - it stores
pickled Python objects in Oracle, PostgreSQL or MySQL)


From gherron at islandtraining.com  Sat May  3 19:44:15 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 03 May 2008 16:44:15 -0700
Subject: is +=1 thread safe
In-Reply-To: <yfswsmbf0gm.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>
Message-ID: <481CF8CF.1020302@islandtraining.com>

Alexander Schmolck wrote:
> AlFire <spamgrinder.trylater at ggmail.com> writes:
>
>   
>>> The threading module already has a function to return the number of Thread
>>> objects currently alive.
>>>       
>> I have threads within threads - so it does not suit me :-(.
>>     
>
> How about using a scalar numpy array? They are mutable, so I assume that x +=
> 1 should be atomic.
>   

No NO NO!   The only way to increment a variable in memory is through a
three step process:

  Load a register from a memory location
  Increment the register
  Store the value back into memory.

Ages ago, there were architectures that would do an increment on a
memory location in an atomic way, but with the current (RISC)
architectures these are three separate operations.

A good compiler may be able to eliminate some of these operations by
keeping the variable in question in a register,  but this just worsens
the problem with respect to threads since each thread has it's own set
of register values.

Gary Herron

> 'as
> --
> http://mail.python.org/mailman/listinfo/python-list
>   




From duncan.booth at invalid.invalid  Wed May  7 08:14:32 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 12:14:32 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
Message-ID: <Xns9A9786AA544CEduncanbooth@127.0.0.1>

Martin Sand Christensen <msc at es.aau.dk> wrote:

>>>>>> "Duncan" == Duncan Booth <duncan.booth at invalid.invalid> writes:
> [...]
> Duncan> Now try:
> Duncan> 
> Duncan>    for command in getCommandsFromUser():
> Duncan>        print "the result of that command was",
> execute(command) Duncan> 
> Duncan> where getCommandsFromUser is a greedy generator that reads
> from stdin, Duncan> and see why generators don't work that way.
> 
> I don't see a problem unless the generator isn't defined where it's
> going to be used. In other similar input bound use cases, such as the
> generator iterating over a query result set in my original post, I see
> even less of a problem. Maybe I'm simply daft and you need to spell it
> out for me. :-)

It does this:

>>> @greedy
def getCommandsFromUser():
	while True:
		yield raw_input('Command?')

		
>>> for cmd in getCommandsFromUser():
	print "that was command", cmd

	
Command?hello
Command?goodbye
that was command hello
Command?wtf
that was command goodbye
Command?

Traceback (most recent call last):
  File "<pyshell#56>", line 1, in <module>
    for cmd in getCommandsFromUser():
  File "<pyshell#42>", line 11, in delayed
    for value in it:
  File "<pyshell#53>", line 4, in getCommandsFromUser
    yield raw_input('Command?')
KeyboardInterrupt


From inhahe at gmail.com  Fri May 16 12:58:07 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:58:07 -0400
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <N1jXj.4900$Kk3.454@bignews9.bellsouth.net>

I'm not sure it's possible to kill a thread in Python that's in the middle 
of a C function.  I know you can't do it with signals, for example.  Or can 
you?  I'm on Windows and signals isn't fully implemented.

I had to do just this, btw, so I wrote another Python program that 
communicates with the main one over a socket and then if it misbehaves I can 
kill it using an OS command because it's a process and there's an OS command 
for killing processes, and then I'd restart it.  The problem is that, 
sometimes the OS kill command would work, sometimes it wouldn't, and I never 
did figure what makes the difference.



"Roger Heathcote" <usenet at technicalbloke.com> wrote in message 
news:DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d at bt.com...
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing of 
> threads is a cardinal sin and although I have no particular threading 
> problem to crack right now I remain interest in the taboo that is thread 
> killing. The real world and it's data are messy and imperfect and I can 
> think of several scenarios where it could be useful to be able to bump off 
> a naughty thread, especially when using/testing unstable 3rd party modules 
> and other code that is an unknown quantity.
>
> With this in mind I am experimenting with a set of threading subclasses 
> that would permit timeouts and the manual killing of threads. I'm trying 
> to evaluate how robust such a scheme can be made and what the limitations 
> would be in practice.
>
> So far I can seemingly murder/timeout pure python threads that are stuck 
> blocking for input and stuck in infinite loops but I'm guessing there are 
> many more awkward cases. What I'm looking for are examples of code/modules 
> that can get stuck in dead ends or might otherwise be problematic to 
> terminate.
>
> In particular I'd be interested to see if I could kill a non-returning c 
> module. Of course naturally no one wants to be publishing buggy modules 
> and the like so I am having trouble finding examples of misbehaving c code 
> to explore further. I figure I could learn how to write c modules for 
> python but, while it's something I'd like to know someday, I'm guessing 
> that will be too long to fit into the immediate future :/ Consequently if 
> anyone has detailed knowledge of what is and isn't fundamentally possible 
> in the world of thread culling, or if you can point me to some 
> gnarly/non-returning thread code to test with I would be forever grateful.
>
> Oh yes, I'm working primarily with 2.5 on XP however I have access to 
> linux & OSX boxen and I'd be interested to learn about problematic thread 
> code for either of those platforms as well.
>
> Thanks for reading,
>
> Roger Heathcote - www.technicalbloke.com 




From kyosohma at gmail.com  Thu May 15 16:11:24 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 15 May 2008 13:11:24 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
Message-ID: <577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>

On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Mike Driscoll wrote:
> > Hi,
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> > shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> > Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to Firefox
> > out, it works too. Is there another method I can use other than
> > creating the shortcut by hand and using the shutil module?
>
> > Thank you for any ideas.
>
> > Mike
>
> Either you copied wrong or the problem is:
>
> "C:\"C:\Program Files...
>
> Note the C:\ is specified twice in the string.  I think it should read:
>
>  > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
>  > \www.myCompanyWebsite.com\auth\preauth.php"
>
> -Larry

Yeah, I know that it's in there twice and that that is the problem.
But I'm not causing that extra C:\. I run it exactly as above and that
is what I get for the output. I think it's the COM object. Maybe I
better just re-post this to the PyWin32 list...

Thanks,

Mike


From bbxx789_05ss at yahoo.com  Sat May 17 14:15:31 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 11:15:31 -0700 (PDT)
Subject: Cookies and CookieJar
References: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>
Message-ID: <9fa71b33-3783-41c0-9897-1785d5bf1ca9@25g2000hsx.googlegroups.com>

Larry Bates wrote:
> I'm struggling with a project using mechanize and cookies to screen scape a
> website.  The site requires a client created cookie for authentication.

Are you sure that is correct?  As far as I know, the usual course of
events is for a site to set a cookie header in the response it sends
back to the client browser, which gets stored on the client's
computer.  Then when the browser makes subsequent requests to that
site, the browser will automatically include the cookies that were set
by that site.


From bbxx789_05ss at yahoo.com  Sun May 11 15:48:11 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:48:11 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <ac2d6ee3-9e82-468f-8f2c-c5d72859896c@b1g2000hsg.googlegroups.com>

bc90021 wrote:
> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>
> where fileName is defined before the line it's used in.  It works fine
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>
> Are threads not allowed to create files?

...oh yeah:

import threading
import time

fname = "data.txt"
f = open(fname)
print f.read()
f.close()

f = open(fname, "a")
f.write("some text\n")
f.close()

f = open(fname)
print f.read()
f.close()


class MyThread(threading.Thread):
    def __init__(self, file_name):
        threading.Thread.__init__(self)

    def run(self):
        time.sleep(3)

        f = open(fname)
        print f.read()
        f.close()

        f = open(fname, "a")
        f.write("other text\n")
        f.close()

        f = open(fname)
        print f.read()
        f.close()


my_t = MyThread(fname)
my_t.start()
my_t.join()


--output:--
hello
world

hello
world
some text

hello
world
some text

hello
world
some text
other text


From levlozhkin at gmail.com  Wed May  7 01:04:58 2008
From: levlozhkin at gmail.com (lev)
Date: Tue, 6 May 2008 22:04:58 -0700 (PDT)
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
	<15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>
	<mailman.569.1209963940.12834.python-list@python.org>
Message-ID: <a4046853-e77a-496e-bbf4-f85766a1413e@v26g2000prm.googlegroups.com>

On May 4, 10:04 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 17:01:15 -0300, lev <levlozh... at gmail.com> escribi?:
>
> >> * Change indentation from 8 spaces to 4
> >     I like using tabs because of the text editor I use, the script at
> > the end is with 4 though.
>
> Can't you configure it to use 4 spaces per indent - and not use "hard" tabs?
>
> >> * Remove useless "pass" and "return" lines
> >     I replaced the return nothing lines with passes, but I like
> > keeping them in case the indentation is ever lost - makes it easy to
> > go back to original indentation
>
> I can't think of a case when only indentation "is lost" - if you have a crash or something, normally you lose much more than indentation... Simple backups or a SCM system like cvs/svn will help. So I don't see the usefulness of those "pass" statements; I think that after some time using Python you'll consider them just garbage, as everyone else.
>
> >> * Temporarily change broken "chdir" line
> >     removed as many instances of chdir as possible (a few useless ones
> > to accomodate the functions - changed functions to not chdir as much),
> > that line seems to work... I made it in case the script is launched
> > with say: 'python somedir\someotherdir\script.py' rather than 'python
> > script.py', because I need it to work in it's own and parent
> > directory.
>
> You can determine the directory where the script resides using
>
> import os
> basedir = os.path.dirname(os.path.abspath(__file__))
>
> This way it doesn't matter how it was launched. But execute the above code as soon as possible (before any chdir)
>
> >     checksums = open(checksums, 'r')
> >     for fline in checksums.readlines():
>
> You can directly iterate over the file:
>
>      for fline in checksums:
>
> (readlines() reads the whole file contents in memory; I guess this is not an issue here, but in other cases it may be an important difference)
> Although it's perfectly valid, I would not reccomend using the same name for two different things (checksums refers to the file name *and* the file itself)
>
> >     changed_files_keys = changed_files.keys()
> >     changed_files_keys.sort()
> >     missing_files.sort()
> >     print '\n'
> >     if len(changed_files) != 0:
> >         print 'File(s) changed:'
> >         for key in changed_files_keys:
>
> You don't have to copy the keys and sort; use the sorted() builtin:
>
>      for key in sorted(changed_files.iterkeys()):
>
> Also, "if len(changed_files) != 0" is usually written as:
>
>      if changed_files:
>
> The same for missing_files.
>
> >         for x in range(len(missing_files)):
> >             print '\t', missing_files[x]
>
> That construct range(len(somelist)) is very rarely used. Either you don't need the index, and write:
>
> for missing_file in missing_files:
>      print '\t', missing_file
>
> Or you want the index too, and write:
>
> for i, missing_file in enumerate(missing_files):
>      print '%2d: %s' % (i, missing_file)
>
> > def calculate_checksum(file_name):
> >     file_to_check = open(file_name, 'rb')
> >     chunk = 8196
>
> Any reason to use such number? 8K is 8192; you could use 8*1024 if you don't remember the value. I usually write 1024*1024 when I want exactly 1M.
>
> --
> Gabriel Genellina

Thank you Gabriel, I did not know about a number of the commands you
posted, the use of 8196 was error on my part. I will change the script
to reflect your corrections later tonight, I have another project I
need to finish/comment/submit for corrections later on, so I will be
using the version of the script that I will come up with tonight.

Thank you for your invaluable advice,
The python community is the first online community that I have had
this much help from, Thank you all.


From bignose+hates-spam at benfinney.id.au  Wed May 28 18:01:55 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 29 May 2008 08:01:55 +1000
Subject: Traling white space on program source lines (was: Simple Doc Test
	failing without any reason [Help Needed])
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
	<6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>
	<6117786a-ae42-493f-8120-be16233b2980@l17g2000pri.googlegroups.com>
Message-ID: <87mymarsto.fsf_-_@benfinney.id.au>

afrobeard <afrobeard at gmail.com> writes:

> >>> sanitize_number('0321-4683113')<There were some spaces in these angle brackets>
> 
> Apparently they caused the test case to fail on this.
> 
> Weird behavior :/

Nope, exactly as specified: doctest is reporting differences berween
what output was generated and what output you described.

> Thanks for your time Gerard and thanks to everyone else too.

Moral of the story: Configure your editor to highlight trailing space
on a line as an error, and always remove it before saving a program
source code file.

-- 
 \       ?Men never do evil so completely and cheerfully as when they |
  `\                 do it from religious conviction.? ?Blaise Pascal |
_o__)                                     (1623-1662), Pens?es, #894. |
Ben Finney


From brian at sweetapp.com  Thu May 22 18:19:35 2008
From: brian at sweetapp.com (Brian Quinlan)
Date: Thu, 22 May 2008 23:19:35 +0100
Subject: Python and Flaming Thunder
In-Reply-To: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <4835F177.9090905@sweetapp.com>

Dave Parker wrote:
>> Or just:
>>
>> If command is "quit" ...
> 
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
> 
>      Read data from "input.txt".
>      If data is an error then go to ...

Hey Dave,

Does this mean that Flaming Thunder requires explicit checking rather 
than offering exceptions?

Cheers,
Brian


From daveparker at flamingthunder.com  Wed May 28 09:26:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 06:26:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <01a1457d-4734-4a6b-8fb8-816a54e4d770@p39g2000prm.googlegroups.com>

> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...

I enjoyed the discussion of how different languages handle the notion
of "="; I learned something new.  Thanks.

On May 22, 9:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > ?But after getting input from children and teachers, etc, it started
> > ?feeling right.
>
> > ?For example, consider the two statements:
>
> > ? ? ? x = 8
> > ? ? ? x = 10
>
> > ?The reaction from most math teachers (and kids) was "one of those is
> > ?wrong because x can't equal 2 different things at the same time".
>
> This is a common feature in functional languages...
>
> Eg
>
> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> [async-threads:0] [kernel-poll:false]
>
> Eshell V5.6.2 ?(abort with ^G)
> 1> X = 8.
> 8
> 2> X = 10.
> ** exception error: no match of right hand side value 10
> 3>
>
> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick



From spoier at gmail.com  Tue May 20 15:58:49 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 12:58:49 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
	<d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
Message-ID: <8fb9d8a3-caac-45af-92ff-4540dc14f596@v26g2000prm.googlegroups.com>

Nevermind, I seem to have found it on my own =]

http://python.org/doc/2.5/lib/module-struct.html

This module performs conversions between Python values and C structs
represented as Python strings. It uses format strings (explained
below) as compact descriptions of the lay-out of the C structs and the
intended conversion to/from Python values. This can be used in
handling binary data stored in files or from network connections,
among other sources.

I freakin' love Python!!

Skye



From torriem at gmail.com  Mon May 19 20:14:12 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 19 May 2008 18:14:12 -0600
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <4831DDCA.2050005@gmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>	<d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
	<4831DDCA.2050005@gmail.com>
Message-ID: <483217D4.8010303@gmail.com>

Michael Torrie wrote:
> And of course Python is perfect in this area.  A great example is found
> here:

ahem, http://www.dabeaz.com/generators/Generators.pdf


From darcy at druid.net  Fri May  2 09:21:27 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 09:21:27 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87ve1xz23l.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87ve1xz23l.fsf@benfinney.id.au>
Message-ID: <20080502092127.fa308411.darcy@druid.net>

On Fri, 02 May 2008 15:50:22 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > You have lived a sheltered life.  Not every packaging system puts the
> > executible in /usr/bin.  Many systems use /usr/local/bin.
> 
> They use that for the operating-system-installed default Python
> interpreter? Colour me incredulous.

OK, let me get out my crayons.  However, note that I did not say
"operating-system-installed."  I said a packaging system puts it
there.  In fact, the NetBSD packaging system works on many systems
including Linux and thus is not an operating system packager.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From martindesalinas at gmail.com  Fri May 16 04:22:01 2008
From: martindesalinas at gmail.com (martindesalinas at gmail.com)
Date: Fri, 16 May 2008 01:22:01 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com> 
	<482c4934$0$6041$426a74cc@news.free.fr>
Message-ID: <60e2ee6e-955a-49f2-a87a-ad8c3908d2c8@l42g2000hsc.googlegroups.com>

look at module re (rgular expression) or pyparser

see http://nedbatchelder.com/text/python-parsers.html



From a.harrowell at gmail.com  Thu May 29 09:09:06 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 06:09:06 -0700 (PDT)
Subject: Strange thing with types
Message-ID: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>

I'm doing some data normalisation, which involves data from a Web site
being extracted with BeautifulSoup, cleaned up with a regex, then
having the current year as returned by time()'s tm_year attribute
inserted, before the data is concatenated with string.join() and fed
to time.strptime().

Here's some code:
timeinput = re.split('[\s:-]', rawtime)
print timeinput #trace statement
print year #trace statement
t = timeinput.insert(2, year)
print t #trace statement
t1 = string.join(t, '')
timeobject = time.strptime(t1, "%d %b %Y %H %M")

year is a Unicode string; so is the data in rawtime (BeautifulSoup
gives you Unicode, dammit). And here's the output:

[u'29', u'May', u'01', u'00'] (OK, so the regex is working)
2008 (OK, so the year is a year)
None (...but what's this?)
Traceback (most recent call last):
  File "bothv2.py", line 71, in <module>
    t1 = string.join(t, '')
  File "/usr/lib/python2.5/string.py", line 316, in join
    return sep.join(words)
TypeError


From bignose+hates-spam at benfinney.id.au  Wed May 14 18:01:42 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 08:01:42 +1000
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
Message-ID: <873aokzgs9.fsf@benfinney.id.au>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 18:20, castiro... at gmail.com wrote:
> > I'm concerned over the future of Python.  Should tuples be named?
> 
> Obviously not, unless they should.

Clearly they should, unless not.

-- 
 \               ?It is seldom that liberty of any kind is lost all at |
  `\                                                once.? ?David Hume |
_o__)                                                                  |
Ben Finney


From jon+usenet at unequivocal.co.uk  Thu May  1 15:13:08 2008
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: Thu, 01 May 2008 14:13:08 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
Message-ID: <slrng1k5i4.rtj.jon+usenet@snowy.squish.net>

On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> I used XML files before for this purpose and found YAML much easier and 
> better suitable for the task.
>
> Please explain why don't like YANL so much?

Because even the examples in the spec itself are unreadable gibberish.
The PyYAML library is over 300kB! These are rather big clues that it's
unsuitable for the purpose for which it was designed. It's certainly
unsuitable for use as a configuration file format, where it is
overkill by several orders of magnitude.

  !!str &a1 "foo":
  !!str bar
  &a2 baz : *a1
  !<tag:yaml.org,2002:str> foo :
  !<!bar> baz

This is supposed to be human readable?

> PS. Your reply remind me of early days of Python when Perl programmers 
> said exacly the same thing about Python.

I think I would suffer irony overload if I saw a Perl programmer
criticising Python for being hard to read ;-)


From collinyeung at shaw.ca  Tue May 13 21:02:36 2008
From: collinyeung at shaw.ca (Collin)
Date: Wed, 14 May 2008 01:02:36 GMT
Subject: Accepting text input
In-Reply-To: <mailman.960.1210570776.12834.python-list@python.org>
References: <72QVj.262833$pM4.115744@pd7urf1no>	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
Message-ID: <MSqWj.266252$pM4.8985@pd7urf1no>

Gabriel Genellina wrote:
> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> escribi?:
> 
>> Collin wrote:
>>> I'm pretty new to Python, but this has really bugged me. I can't find a
>>> way around it.
>>>
>>>
>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>
>>> Any help would be appreciated. Thanks.
>>
>> Oh, wow. I feel so stupid. Please disregard this message. <_<
> 
> No need to apologize...
> 
>> I read the error message just now a bit more carefully, and I tried
>> something. I tried defining "yes" as some random numerical value. Then
>> when I did:
>> (example code)
>>
>> yes = 123123983 #some number
>> test = input("Test test test ")
>> if test == yes:
>> 	print "It worked."
>> else:
>> 	print "failed"
>>
>> (example code off)
> 
> The usual way for Python<3.0 is:
> 
> answer = raw_input("Test test test ").lower()
> if answer == "yes":
>      ...
> 
> The input() function evaluates user input as an expression: if he types 2+5 the input() function returns the integer 7. I would never use input() in a program - it's way too unsafe; use always raw_input instead.
> 

If I use it like that, do I have to import anything to have the .lower() 
work? And if I do, what does the .lower() signify?


From bignose+hates-spam at benfinney.id.au  Sat May 24 21:04:26 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:04:26 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <87ve139oth.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> Problem 1: You can only code against tests
> 
> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing
> the code you will also think of a lot of corner cases you should
> also handle. The natural way to do this is to add them to the code
> first.

In Behaviour Driven Development, that's not the natural way, since you
don't add code unless a test requires you to add it.

Very often, by designing the code to the point where you write an
automated test for it, you find You Aren't Gonna Need It
<URL:http://c2.com/cgi/wiki?YouArentGonnaNeedIt> for many of the
corner cases you envisaged, so you *save* time by thinking about the
code design first.

> But with TDD you have to first write a test for the corner case,
> even if setting up test code for it is very complicated.

For this, unit test frameworks have "fixtures": a common test
environment that will be set up before each test case that is defined
to need that fixture, and torn down after the test runs (whether the
test result is pass, fail, or error).

In Python's 'unittest', this is done by grouping related test cases
together into methods of a TestCase class, and defining fixtures that
will be present for every test case in that class.

> So, you have these options:
> 
> - Take as much time as needed to put a complicated test case in
> place.

Which is a motivator to make the interfaces less complicated, *before*
implementing them, so the code becomes easier to test.

> - Don't add corner case to your code because you can't (don't have
> time to) write a test for it.

That's a false economy.

If you don't have the time to write a test for it, that's the same
thing as saying you don't have the time to know whether you've done
the implementation right.

You pay for it later, with *much* interest, in time spent hunting down
bugs caused by that code, when you could have had an automated test
simply tell you the breakage and its location as soon as it happened.
That's time that you spend before even getting to the point of fixing
the bug. Thus, writing tests first *saves* time, by not having to hunt
those bugs that could be found by automated tests at all.

> - Add the corner case handling to the code first, and try to add a
> test later if you have time for it.

A recipe for disaster: now you have code which isn't there to satisfy
a test, and since you say it's for a corner case, it's likely not
exercised by the test suite at all. Take everything said above about
debugging time and multiply it.

> Problem 2: Slows down prototyping
> 
> In order to get a new system working, it's nice to be able to throw
> together a set of modules quickly, and if that doesn't work, scrap
> it and try something else. There's a rule (forget where) that your
> first system will always be a prototype, regardless of intent.

Fred Brooks gave that law. "Plan to throw one away; you will, anyhow."

The same rule also implies that throwing it away is worthwhile because
the main value of the first version is not in the code itself, but in
what it *taught* you about how to make the second version.

> With TDD, you have to first write the tests for the first version.
> Then when that first version doesn't work out, you end up scrapping
> the tests and the code. The time spent writing the tests was wasted.

I find that, with a good unit test suite in place, the first version
can much more easily *evolve* into the second version: the first
version gets thrown away, but in pieces over a short time, instead of
a whole lump.

Complete coverage by unit tests makes bold changes to the code far
less risky, so as enlightenment dawns about how crappy the original
design was, altering the existing system is much more natural.

> Having to write tests for all code takes time.

Yes. That's time you'll have to spend anyway, if you want your code
tested. Whether you write the tests, early or late, they'll still take
time to write. But writing them *while* you develop the code means you
actually *do* write them, instead of putting them off to the point
where they never get written.

also, since with Behaviour Driven Development you're writing tests at
the point where you implement the code, you are writing *only* tests
that are needed to assert behaviour for the code you're about to
write. This results in countless wrong paths not being taken as a
result of smaller feedback cycles, so you save time in all the
unnecessary tests you *don't* write.

If you don't want your code to have complete automated unit test
suites, I don't want to be your customer.

> Instead of eg: 10 hours coding and say 1/2 an hour manual testing,
> you spend eg: 2-3 hours writing all the tests, and 10 on the code.

This is a false economy. If all you do is 2-3 hours of manual testing,
are you then prepared to say the code works for *all* requirements
with a high degree of confidence?

As I'm sure you'll agree, automated, complete-coverage testing for all
code paths is far superior confidence to 2-3 hours of manual testing.

> Problem 4: Can make refactoring difficult.

Your explanation for this below is only that it takes time, not that
it's difficult to do.

> If you have very complete & detailed tests for your project, but one
> day you need to change the logic fundamentally (maybe change it from
> single-threaded to multi-threaded, or from running on 1 server to
> distributed), then you need to do a large amount of test refactoring
> also.

Again, this is not a problem with the *way* the tests are written, nor
*when* they're written, but the fact that they're there at all.

> The more tests you have (usually a good thing), the longer it will
> take to update all the tests, write new ones, etc. It's worse if you
> have to do all this first before you can start updating the code.

Who says you have to do all the changes to all the tests before
changing any of the code? That would be spectacularly bad practice.

Behaviour Driven Development says that you address *one* change in
behaviour at a time, so that you know which failing tests to address.
This makes the work much more manageable, since it localises the
changes to both the tests and the application.

> You need to justify the extra time spent on writing test code.

>From the perspective of someone who once thought this way, and then
dug in and did Behaviour Driven Development, I can tell you the time
is entirely justified: by better design, more maintainable code,
higher confidence when speaking to customers, high visibility of
progress toward completion, freedom to refactor code when it needs it,
and many other benefits.

> Tests are nice, and good to have for code maintainability, but they
> aren't an essential feature (unless you're writing critical software
> for life support, etc).

Whether your customers express it at the time they specify the system,
they want as much testing as you can fit in. Whom do you think they
will blame when the application breaks?

If their specified requirements explicitly describe some behaviour,
but you don't have automated tests to tell you whether or not the
application actually behaves that way, and the application breaks when
they try it after paying you to implement it, what possible excuse do
you think the customers will accept?

> Clients, deadlines, etc require actual software, not tests for
> software (that couldn't be completed on time because you spent too
> much time writing tests first ;-)).

Clients also require meaningful feedback on progress toward the goal.

Without a complete-coverage unit test suite, you have a completely
unknown amount of debugging time looming that grows the longer the
project continues. Any figure of completion that you give to the
customer will be wildly inaccurate because of this unknown factor, and
it will bits when you get to the point of "90% feature complete", but
the project blows out hugely because completing that last 10% involves
masses of debugging time.

You've no doubt heard the old saw about software project development:
90% of the implementation consumes 90% of the schedule. The last 10%
consumes another 90% of the schedule."

With an automated unit test suite that has complete coverage of the
code at all stages of implementation, you can be much more confident
that the features *are* complete as specified, because the
specifications are codified as unit tests, and the unit tests pass.
You're checking items off a meaningful list, rather than coding and
praying that you got it right.

> I think that automated tests can be very valuable for
> maintainability, making sure that you or other devs don't break
> something down the line. But these benefits must be worth the time
> (and general inconvenience) spent on adding/maintaining the tests.

I encourage you to try it. Learn your unit test suite (Python's
'unittest' and 'doctest' modules are fine), learn how to easily run it
automatically (the third-party 'nose' package is great for this), and
follow Behaviour Driven Development on one small aspect of your code;
perhaps a single module.

> If I did start doing some kind of TDD, it would be more of the
> 'smoke test' variety. Call all of the functions with various
> parameters, test some common scenarios, all the 'low hanging fruit'.
> But don't spend a lot of time trying to test all possible scenarios
> and corner cases, 100% coverage, etc, unless I have enough time for
> it.

This was my point of view too. Then I discovered that the code I was
writing under Behaviour Driven Development involved far fewer
dead-ends, far better designs, and far more constant forward progress
? all as a result of the fact that I had to design the code well
enough to write tests for it, *before* actually implementing that
code.

> I'm going to read more on the subject (thanks to Ben for the link).
> Maybe I have some misconceptions.

If so, you're certainly not alone.

Happy hacking!

-- 
 \              ?You can be a victor without having victims.? ?Harriet |
  `\                                                             Woods |
_o__)                                                                  |
Ben Finney


From inhahe at gmail.com  Wed May 21 02:22:03 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 02:22:03 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
	<0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>
	<XkMYj.13011$Xv3.1374@bignews4.bellsouth.net>
Message-ID: <LbPYj.13080$Xv3.11228@bignews4.bellsouth.net>

>
> i don't know how i would get around the problem, though, because i'd have 
> to know how to access the deque object that my class stores when i do 
> deque.__init__ in my constructor, so that i could pickle it and my class 
> variables separately.
>
>

i decided i could just pickle deque(self), which should return a regular 
deque object with the data from self, and then in the load routine make a 
pdeque object from it.

that, of couse, gives me another error.  'collections.deque' object has no 
attribute 'write'.  from the line 'self.write = file.write', which is in 
pickle.py
pickling list(self) doesnt work either.







From roy at panix.com  Sat May 24 11:01:48 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 11:01:48 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <roy-78E3A6.11014824052008@70-1-84-166.area1.spcsdns.net>

In article 
<5ea78616-e955-4ee0-8e60-a22734ec31be at 79g2000hsk.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.

I hear what you're saying, friend, and I feel your pain!  Life gets so much 
more complicated when you've got paying customers.  It's especially 
complicated when your customers have a market cap an order of magnitude 
greater than your own :-)


From yves at zioup.com  Sun May 11 23:42:03 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 03:42:03 GMT
Subject: anonymous assignment
In-Reply-To: <mailman.956.1210562648.12834.python-list@python.org>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
Message-ID: <f0PVj.262779$pM4.237055@pd7urf1no>

D'Arcy J.M. Cain wrote:
> On Mon, 12 May 2008 02:28:13 GMT
> Yves Dorfsman <yves at zioup.com> wrote:
>> particular case, there's got to be a better way than:
>>
>> d = time.local()
>> y = d[0]
>> d = d[1]
> 
> Like this?
> 
>     y, d = time.local()[:2]

Sorry this was a typo (again :-), I meant:

d = time.local()
   y = d[0]
   d = d[2]

Yves.
http://www.SollerS.ca


From deets at nospam.web.de  Tue May 27 05:47:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 11:47:07 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>
	<1997713b-6fc0-497b-ae66-e90626b6645a@m73g2000hsh.googlegroups.com>
Message-ID: <6a23lqF32p1e5U1@mid.uni-berlin.de>

Alex Gusarov wrote:

>>    class MyPaintCell(PaintCell):
>>       def paintcell(self):
>>           PaintCell.paintcell(self)
>>           myPaintCell(self)
>>
>>    (hmm, only 4 lines, I overestimated the cost. Sorry)
> 
> Yeah, that's funny..
> 
> I don't want to do it 'cause I create my form within Designer and
> simply drop Calendar widget to it. Then I need to translate it
> into .py file, it's OK. But if I want to use a custom derived from
> Calendar class instead of it, I need after every refreshing/
> translating of form replace few lines in translated file.
> 
> I just want to know about existence of other method to do this in
> class, that contain instance of Calendar.
> 
> By "this" I mean:
> Instead of calling original method "paintcell" alone, call it with my
> custom metod.

You should ask this on the PyQt-mailing-list. And you can try and experiment
with the module new & the function instancemethod in there.

Diez


From jason.scheirer at gmail.com  Mon May 19 19:05:15 2008
From: jason.scheirer at gmail.com (Jason Scheirer)
Date: Mon, 19 May 2008 16:05:15 -0700 (PDT)
Subject: Serious Problem with Timezone
References: <95b65707-35d1-4ce7-9138-b89c44d8084a@w7g2000hsa.googlegroups.com>
Message-ID: <6f9c7cee-5b6a-41e1-8752-a145c84eb872@w34g2000prm.googlegroups.com>

On May 19, 3:02?pm, T-u-N-i-X <alperka... at gmail.com> wrote:
> Hey There,
>
> I'm a django developer and working on a project right now.. Last week
> I just discovered a new problem in Python.. Here's what I do..
>
> [01:00] (tunix at penguix ~)$ date
> Sal May 20 01:00:10 EEST 2008
> [01:00] (tunix at penguix ~)$ python
> Python 2.5.2 (r252:60911, Feb 23 2008, 21:20:32)
> [GCC 4.2.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> from datetime import datetime
> >>> datetime.now()
>
> datetime.datetime(2008, 5, 20, 1, 0, 21, 131804)>>> import os
> >>> os.environ["TZ"] = "Europe/Istanbul"
> >>> datetime.now()
>
> datetime.datetime(2008, 5, 19, 22, 0, 38, 578438)
>
>
>
> It's 01:00 in Istanbul now and Python shows 22:00 on 19th of May if I
> set the TZ environment variable.. Django sets that variable
> automatically so I'm having problems with scheduled posts..
>
> I controlled my system's BIOS time.. It was wrong before, so I just
> corrected it.. I set the time to UTC on Linux.. What else can I do ?

You may want to investigate the datetime.astimezone() method, as well
as getting comfortable with using tzinfo objects. Check out
http://pypi.python.org/pypi/pytz/ for a module that can give you the
tz objects you want. Also useful is datetime.utcnow()* and
datetime.replace(tzinfo=other_tzinfo), which will give you that same
time but not 'smartly' try to adjust the components in the datetime
object.

I've found datetime.utcnow() is a little temperamental (bad tzinfo is
assigned by default, making it impossible to do conversions) and you
still need to do datetime.utcnow().replace(tzinfo=utctz) to get it to
behave well.


From castironpi at gmail.com  Sat May 17 20:05:30 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 17:05:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <8f963d30-76f6-4ef8-998d-b848c83a74c8@x41g2000hsb.googlegroups.com>

On May 17, 5:32?pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
>
> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
>
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

You're hearing from 'impossible and useless'-- neither operations.

'Stacks' are pretty important to Python (there is a Stackless Python,
I understand), which makes persistence a little more handy.  It's
still a computer and still a language.  You may be asking how well its
best speakers know, and look at that, I can't tell you.  Some of the
fundamentals of Python may be unexplored to date, as its from the 90s,
and stacks are elements.

I, for one, will assume you're interested in control operations, which
yes Python has, and control is important.  The standard library is a
good size to me (I wouldn't go doubling).  There's a ready graphics
module.  There are code-primitive literals, including lists -and- a
tuple.  I think you're looking for the selling points of dynamic
assignment (a.barproperty= 'unheardof'), typefreeness (a= [2,'bcd']),
dynamic execution (exec('print 2'), which promotes a possibility of
self-referentiality), type-aware function pointers, variable-length
procedure arguments, and platform independence.

I think you just asked at the right time.  Yes that's an impressive
list.

There is one catch to Python, of the importance of which of the powers
that be, I am unaware.  But I do know what you are liable to find on
the newsgroup.  Now, with thousands of dollars of institution time on
the money, what control?  I will be tentatively assuming that you are
not covertly comparing other languages.  I don't think you'll like it
if you're unwise.


From castironpi at gmail.com  Fri May 16 09:56:12 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:56:12 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
Message-ID: <e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com>

On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > ?? wrote:
> > >     I wonder why below does not work.
>
> > > a = object()
> > > a.b = 1        # dynamic bind attribute failed...
>
> > The implementation of slots depends on that behaviour:
>
> >http://docs.python.org/ref/slots.html
>
> > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > Can you expand on that?
>
> > Peter
>
> Spirals are important.

I'd be modeling streams, in par. crossing them.


From szhorvat at gmail.com  Mon May  5 03:31:14 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Mon, 05 May 2008 09:31:14 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <Xns9A94ACAB89668duncanbooth@127.0.0.1>
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
Message-ID: <481EB7C2.1040400@gmail.com>

Duncan Booth wrote:
> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
> 
>> I thought that it would be very nice if the built-in sum() function used 
>> this algorithm by default.  Has this been brought up before?  Would this 
>> have any disadvantages (apart from a slight performance impact, but 
>> Python is a high-level language anyway ...)?
> 
> There's a thread you might find interesting:
> 
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a
> 
> In that thread I suggested that Python ought to implement sum by adding 
> together each pair of values, then each pair of results and so on. This 
> means that for input values of a similar magnitude the intermediate results 
> stay balanced. The implementation doesn't actually do all the first level 
> sums first, it builds up a stack containing the sum of 2^k, 2^(k-1)...2 
> values. Also it works for other types as well, and for strings or lists has 
> the advantage of minimising the number of large string or list concatenations.
> 
> If you follow that thread far enough you'll find a post by Jussi Salmela 
> which shows that summing adjacent pairs performs as well as Kahan summation
> (he says 'almost as good' but in fact the only time they get different 
> results the 'correct' answer is 500000.000005 and Kahan and sumpairs get 
> the two nearest representable results either side: 500000.00000499998 and 
> 500000.00000500004 respectively).
> 
> I never did get round to re-coding my sumpairs() function in C, I would be 
> interested to see just how much overhead it introduces (and I suspect it
> would be faster than the existing sum in some cases such as for lists).

Thanks for this link!  Though some of the thread is missing, it was an 
interesting read.

This sounds like a very good idea: it is more generally applicable than 
the Kahan summation because it does not require subtraction/negation, so 
it would work with user-defined types, too.

While now I am convinced that using Kahan summation by default is not 
such a good idea, I cannot see any serious disadvantages/problems with 
pairwise summation!


From upton at virginia.edu  Fri May 16 13:44:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 13:44:32 -0400
Subject: writing python extensions in assembly
In-Reply-To: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <5504f9ac0805161044r7756045cvec72cbc5f8a2f175@mail.gmail.com>

>> 3.  If it is still slow, embed some assembler where it is slowing down.
>>
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.
> Although it's true I'd only have to embed it for one system to see (more or
> less).
>

Regardless of whether it's faster, I thought you indicated that really
it's most important that it's fast enough.

That said, it's not true that you won't know if it's faster until you
embed it--that's what unit testing would be for.  Write your loop(s)
in Python, C, ASM, <insert language here> and run them, on actual
inputs (or synthetic, if necessary, I suppose).  That's how you'll be
able to tell whether it's even worth the effort to get the assembly
callable from Python.

On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>
> Why wouldn't the compilers support it? It's part of the x86
> architexture,
> isn't it?

Yeah, but I don't know if it uses it by default, and my guess is it
depends on how the compiler back end goes about optimizing the code
for whether it will see data access/computation patterns amenable to
SIMD.


From mabbikeel at gmail.com  Tue May  6 15:29:48 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Tue, 06 May 2008 20:29:48 +0100
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
Message-ID: <op.uaqy3yuy4fd8pl@mp1206-hp.config>

On Tue, 06 May 2008 20:02:21 +0100, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:

> vivainio at gmail.com (Ville M. Vainio) writes:
> vivainio at gmail.com (Ville M. Vainio) writes:
>> I don't think BSD/MIT like license really annoys anyone. Think python
>> here ;-)
>
> Python's non-GPL license certainly is annoying to some of us.

I'm intrigued - how can it be annoying?

> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/



From inhahe at gmail.com  Thu May 22 19:02:24 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 19:02:24 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
Message-ID: <gXmZj.61595$3v1.19703@bignews3.bellsouth.net>

actually i ddin't think about the fact that you're overloading dict, which 
can already take multiple values in getitem

so how about

class crazy: pass

and then in your dict class:

def __getitem__(*args):
  if args[-1] is crazy:
    return self.get(args[:-1])*5
  else:
    return self.get(args)

and then
print foo[1,2] #not crazy
print foo[1,2,crazy] #crazy

I *think* that would work




"Andreas Matthias" <amat at kabsi.at> wrote in message 
news:uf6hg5-ca9.ln1 at buckbeak.hogwarts...
> The following code doesn't run but I hope you get what I
> am trying to do.
>
>
> class my_dict (dict):
>
>    def __getitem__ (self, key, crazy = False):
>        if crazy == True:
>            return 5 * self.get(key)
>        else:
>            return self.get(key)
>
>
> foo = my_dict()
> foo['a'] = 123
>
> print foo['a']
> print foo['a', crazy = True]
>
>
> Is it somehow possible to overload __getitem__ with an additional
> argument? Are there other possibilities to achiev this? Or is
> the only solution to this to write a normal function call
> `def my_get (self, key, crazy=False)'?
>
>
> Ciao
> Andreas 




From nick at craig-wood.com  Sat May  3 09:30:04 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 08:30:04 -0500
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org>
Message-ID: <slrng1ooto.avc.nick@irishsea.home.craig-wood.com>

Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>  I've gone through the list of "language differences" between 2.3 / 2.4
>  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
>  CPython, and I consider myself still very very newbie. So, unable to
>  take a call as to how-important or desirable the newer language
>  features are -- so whether to write my app for v2.5 of Python, versus,
>  as few others on this list have recommended, i.e. to stick to v2.3 ??
>  Are the preformance improvements, and memory footprint / leak fix in
>  2.5 enough to justify moving to it ? What all do I stand to lose (or
>  gain) by writing on v2.3 ??

If you are writing for 2.3 you are writing for 2.4 and 2.5 also.

There are some nice things in 2.4 and 2.5 but nothing you really need
IMHO.  So I'd say writing in a 2.3 subset would be perfectly sensible.

>  I've a constraint due to which I might have to also write parts of my
>  app (client side) in Jython (because I want to eventually ship Java --
>  yet benefit from the rapid development and clarity of Python). Would
>  sticking to v2.3 in such a case be a better idea ? Suggestions with
>  reasoning would be very helpful.

Jython seems to be based off python 2.2 so you would be limited to 2.2
features in that case.  No big deal in my opinion.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From hdante at gmail.com  Tue May 13 13:06:48 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 10:06:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>

On May 13, 12:24?pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -
>
>

 Notice that I said "free software", not "*** FREE *** software !!!!
1!" (that is, free as in freedom, not free as in beer). Read again my
answer, considering this.


From george.sakkis at gmail.com  Fri May  9 20:53:19 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 17:53:19 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
Message-ID: <494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com>

On May 9, 5:19?pm, umpsu... at gmail.com wrote:
> > > What would be the best method to print the top results, the one's that
> > > had the highest amount of anagrams?? ?Create a new histogram dict?
>
> > You can use the max() function to find the biggest list of anagrams:
>
> > top_results = max(anagrams.itervalues(), key=len)
>
> > --
> > Arnaud
>
> That is the biggest list of anagrams, what if I wanted the 3 biggest
> lists? ?Is there a way to specific top three w/ a max command??

>>> import heapq
>>> help(heapq.nlargest)
Help on function nlargest in module heapq:

nlargest(n, iterable, key=None)
    Find the n largest elements in a dataset.

    Equivalent to:  sorted(iterable, key=key, reverse=True)[:n]


HTH,
George


From skanemupp at yahoo.se  Tue May 13 21:40:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 18:40:36 -0700 (PDT)
Subject: 2004 example, passing function error
Message-ID: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>

http://linuxgazette.net/109/pramode.html

>>>
>>>def sqr(x): return x*x
...
>>>def cube(x): return x*x*x
...
>>>sqr
<function sqr at 0x402ba10c>
>>>a = [sqr, cube]
>>>a[0](2)
>>>def compose(f, g): return f(g(x))
...
>>>compose(sqr, cube, 2)
64
>>>


but i get:

>>> compose(sqr, cube, 2)

Traceback (most recent call last):
  File "<pyshell#56>", line 1, in <module>
    compose(sqr, cube, 2)
TypeError: compose() takes exactly 2 arguments (3 given)


this:

>>> def compose(f, g, x): return f(g(x))
>>> compose(sqr, cube, 2)
64

works though
. so just a mistake on his part? but it looks like he just copied his
shell...has there been a change since 2004 inr egards to how you can
pass functions as arguments to functions??


From daveparker at flamingthunder.com  Tue May 13 09:14:34 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:14:34 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
	<0001HW.C44D0ADD008F9F39F0284530@news.verizon.net> 
	<JJGdnSTlDrzfLLrVnZ2dnUVZ_r_inZ2d@earthlink.com>
Message-ID: <adaeaf47-3885-45be-a568-1ef57bfdc18f@z16g2000prn.googlegroups.com>

>         REXX's loop construct subsumes all the common uses... And worse, it
> appears that a repetition and a condition can be part of the single
> statement.

Thank you for pointing out the REXX examples.  I am a Kedit user, but
had forgotten about the REXX do-loops.  I'll keep them in mind when I
add an easy way to "do this n times" to Flaming Thunder this weekend.

On May 11, 8:53?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 12 May 2008 00:43:08 GMT, Jonathsn Cronin <j... at theworld.com>
> declaimed the following in comp.lang.python:
>
> > I agree in principle; the first is iteration and the second is repetition.
> > In Python, the common idiom for a fixed number of repetitions is iterating
> > over a number range. ?This is true in most languages I am familiar with,
> > probably because fixed repetition, where you don't care about the "index"
> > value, is rarely used.
>
> > The only language I've used that does have fixed repetition is an (old)
> > dialect of lisp, and I'm not sure it even made it into Common Lisp. ?
> > Smalltalk and Ruby do have fixed repetition.
>
> ? ? ? ? REXX's loop construct subsumes all the common uses... And worse, it
> appears that a repetition and a condition can be part of the single
> statement.
>
> DO FOREVER
> ...
> END
>
> DO repeatcount
> ...
> END
>
> DO loopvar=first TO last BY step FOR reptcount
> ...
> END
>
> (where "TO last", "BY step", "FOR reptcount" are all optional clauses!)
>
> DO WHILE conditional
> ...
> END
>
> DO UNTIL conditional
> ...
> END
>
> ? ? ? ? Mixing modes
>
> DO loopvar=first BY step UNTIL conditional
> ...
> END
>
> Hmmm, looks like it's been extended for container objects (those that
> support MAKEARRAY):
>
> DO item OVER container
> ...
> END
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/



From bruno.desthuilliers at gmail.com  Fri May 23 17:00:33 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 14:00:33 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr> 
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
Message-ID: <89be7f59-4c08-4739-ab07-d310e0c6aef3@2g2000hsn.googlegroups.com>

On 23 mai, 10:42, "inhahe" <inh... at gmail.com> wrote:
> "Bruno Desthuilliers" <bruno.42.desthuilli... at websiteburo.invalid> wrote in
> messagenews:4836772e$0$6097$426a74cc at news.free.fr...
>
> > Brad a ?crit :
> >> cm_gui wrote:
> >>> Python is slow.
>
> >> It ain't C++, but it ain't a punch card either... somewhere in between. I
> >> find it suitable for lots of stuff. I use C++ when performance really
> >> matters tho... right tool for the job. Learn a good interpreted language
> >> (Pyhton) and a good compiled language (C or C++)
>
> > LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> > 1/ being interpreted or compiled (for whatever definition of these
> > terms) is not a property of a language, but a property of an
> > implementation of a language.
>
> That's like saying being spherical is not a property of planets, it's a
> property of an instanciation of a planet.

I do definitively not have the required knowledge to say anything
about "being spherical" being part of the definition of what a
"planet" is or not.

>, and b) It's a far cry to
> imagine a planet coming into being that's not spherical

Idem

>  (a language as
> dynamic as Python, or most other scripting languages, would be either
> extremely difficult or impossible to make a native compiler for).

Now this I can tell is false. The problem is not that it's difficult
to "make a native compiler for" dynamic languages, the problem is that
it's difficult to write native compiler for dynamic languages that
generates code that beats the VM/byte-code interpreter/whatever you
name it to be wotrh the effort.

> I guess I
> should also mention that Python isn't very practical (as in "suitable",
> "right tool for the job", and "perfomance", as mentioned in the above post)
> without an implementation.

That is debatable. There are algorithm courses taught in "pseudo-code"
- that is, a language that doesn't have any known implementation.

> So I don't think this distinction has any use
> other than to beat other people over the head with a bat.

Ok, *you* know this - I mean, the distinction between a language and a
language's implementation(s).  Are you sure everyone saying - or
reading - assertions such as "language XXX is slow" or "compiled
languages are faster" etc really know what they're talking about ?

> > 2/ actually, all known Python implementations compile to byte-code.
>
> Which is then interpreted, but you're still technically right, because
> "compiled" can mean either compiled to bytecode or compiled to native code,
> despite what it actually did mean.  Semantics FTW!!

Yes, semantics. But a bit more than semantics - byte-code interpreters
are usually way faster than "pure" interpreter, and start to be fast
enough for quite a lot of practical use.

Ok, I'll stop on this - once again, sorry for the noise, and please
bear with me, I tend to be a bit too much on the pedantic side
sometimes. But still, thanks to the pedantics peoples on usenet that
taught me so much so far and still teach me more and more...


From rowen at cesmail.net  Thu May 15 16:03:08 2008
From: rowen at cesmail.net (Russell E. Owen)
Date: Thu, 15 May 2008 13:03:08 -0700
Subject: Pass data from Python to C++
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <rowen-5B645A.13030715052008@news.u.washington.edu>

In article <g0hrq3$rfb$1 at solaris.cc.vt.edu>, brad <byte8bits at gmail.com> 
wrote:

> I have some c++ binaries that do rather intense number computations. 
> They do it well and rather quickly compared to other languages (not just 
> Python). ...
> 
> However, other components can be written in a more user friendly, more 
> easily maintained language. We've chosen Python for this. The main 
> question now is how to pass the computationally heavy info to c++ from 
> within Pyhton. os.system is not ideal. Just wondering how other folks do 
> this? I have source to some of the c++ code, but some of it is in binary 
> from only. It can take stdin or arguments.

You say you have "binary only", but I hope you have the header files as 
well. If so I would try SWIG first since it is mature and handles C++ 
quite well. If you don't have headers then I have no idea if it's even 
possible.

(For plain C I would start with ctypes, but that doesn't cover this 
case. There are many other options including boost and Pyrex, but I've 
not used those.)

-- Russell


From rares at ics.uci.edu  Sun May 25 02:56:10 2008
From: rares at ics.uci.edu (Rares Vernica)
Date: Sat, 24 May 2008 23:56:10 -0700
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <y1r1w3qan3p.fsf@ics.uci.edu>

use a set to store them:

>>> s=set()
>>> s.add('a')
>>> s.add('b')
>>> s
set(['a', 'b'])
>>> s.add('a')
>>> s
set(['a', 'b'])
>>> s.add('c')
>>> s
set(['a', 'c', 'b'])
>>> 

it does remove duplicates, but is it not ordered. to order it you can
use:

>>> l=list(s)
>>> l.sort()
>>> l
['a', 'b', 'c']

hth,
Rares


From pavlovevidence at gmail.com  Tue May 13 19:46:23 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 16:46:23 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <fcabf79a-8856-4e9d-89e9-a9b7345fa8ff@59g2000hsb.googlegroups.com>

On May 13, 6:09 pm, Eric Anderson <e... at pixelwareinc.com> wrote:
> I mainly work in other languages (mostly Ruby lately) but my text
> editor (Scribes) is python. With python being everywhere for dynamic
> scripting I thought I would read the source to learn the language
> better (I've gone through some basic tutorials but I always prefer to
> learn from real source).

There is one significant drawback of that....


> So right from the start I see the following:
>
> from operator import truth
> if truth(argv):
>   # blah blah blah
>
> It is obvious they are testing to see if any command line arguments.
> But curious for why the function is needed.

It isn't.  The above is terrible code.

1. You don't even need operator.truth; the built-in bool performs that
job.  However, this code could have been written before the advent of
bool, so we'll give it a temporary pass.
2. bool in unnecessary in this context.
3. Lest someone claim that truth serves to document that you are
asking for the boolean value of argv (i.e., whether it's not empty),
it's redundnant since the if statement implies that.


> So I look up the operator
> package and fine it provides functions that are equivalent to the
> native operators. So my question is why would someone right the above
> instead of just
>
> if argv:
>   # blah blah blah
>
> Seems like unnecessary code but obviously I know nothing about Python.

You know more than the person who wrote the code above.

The purpose of the operator module is to provide  functional
representations of Python operators (and a few non-operators) for
functional programming.  They could, for example, be useful as the
arguments of map and reduce.  Few beginners use functional programming
so you might not want to worry about it now, though if you've been
using Ruby you might have done it before.

operator.truth was one of the few things in that module that was
useful for things other than functional programming, since there is no
truth operator in Python.  Now that the language has bool it's no
longer needed.


Carl Banks


From bruno.desthuilliers at gmail.com  Thu May 15 17:25:40 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 14:25:40 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com> 
	<482c428c$0$9669$426a34cc@news.free.fr> <m2bq37a7i5.fsf@googlemail.com>
Message-ID: <ddb0484b-f666-4c6e-88e3-b47fb976edc8@m36g2000hse.googlegroups.com>

On 15 mai, 17:53, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Bruno Desthuilliers <bruno.42.desthuilli... at websiteburo.invalid> writes:
> > FWIW, I wonder why the BDFL choosed to implement __new__ as a
> > staticmethod - there are probably some pretty good reasons, but not
> > knowing them, it looks like __new__ would have been a perfect
> > candidate for a classmethod.
>
> > So far, the only reason I can think of is that making it a classmethod
> > would have required the use of super(Parent, cls) to call the parent's
> > class __new__, which may (or may not - never had the case) be
> > problematic (any guru on this ?)
>
> Don't know but I remember something about this in 'Unifying types and
> classes'.  There it is:
>
>     Factoid: __new__ is a static method, not a class method. I
>     initially thought it would have to be a class method, and that's
>     why I added the classmethod primitive. Unfortunately, with class
>     methods, upcalls don't work right in this case, so I had to make
>     it a static method with an explicit class as its first
>     argument. Ironically, there are now no known uses for class
>     methods in the Python distribution (other than in the test
>     suite). I might even get rid of classmethod in a future release if
>     no good use for it can be found!
>
> (http://www.python.org/download/releases/2.2/descrintro/)

Thanks Arnaud. I knew there was something about this, but just
couldn't remember what. Now at least this factoid makes sense to
me :-)

Strange enough, it happened that classmethods ended being much more
used that staticmethods...

> I don't have the time to try to figure it out :(

class Foo(object):
    @classmethod
    def dothis(cls):
        print "Foo.dothis, cls is %s" % cls

    @staticmethod
    def dothat(cls):
        print "Foo.dothat, cls is %s" % cls

class Bar(Foo):
    @classmethod
    def dothis(cls):
        print "Bar.dothis, cls is %s" % cls
        try:
            Foo.dothis(cls)
        except Exception, e:
            print "trying direct call to Foo.dothis(cls), got %s" % e
        try:
            super(Bar, cls).dothis()
        except Exception, e:
            print "trying call to super(Bar, cls).dothis(), got %s" %
e

    @staticmethod
    def dothat(cls):
        print "Bar.dothat, cls is %s" % cls
        try:
            Foo.dothat(cls)
        except Exception, e:
            print "trying direct call to Foo.dothat(cls), got %s" % e
        try:
            super(Bar, cls).dothat(cls)
        except Exception, e:
            print "trying call to super(Bar, cls).dothat(), got %s" %
e

For classmethods, you *need* to use super to call the parent's class
classmethod from within the overridden child class classmethod. Which
sometimes may not be what you want for __new__. While this is a kind
of a corner case (that I never met so far, hence my interrogations
about why is __new__ a staticmethod taking the class as argument
instead of a classmethod), it is still a potential showstopper.





From workitharder at gmail.com  Wed May 21 20:06:07 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:06:07 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
Message-ID: <a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>

On May 21, 4:33 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> Andr? <andre.robe... at gmail.com> wrote innews:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com:
>
> > How about something like the following (untested)
>
> > done = False
> > while not done:
> >   try:
> >      some_function()
> >      done = True
> >   except:
> >      some_function2()
> >      some_function3()
>
> Sure, that works, but I was aiming for something more elegant and Pythonic
> ;).
>
> --
>  _______                                        Karlo Lozovina - Mosor
> |   |   |.-----.-----.     web:http://www.mosor.net|| ICQ#: 10667163
> |       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
> |__|_|__||_____|_____|

It's hard to get around a while loop if you want to conditionally
repeat something. There's no built-in way to do what you ask.


From kyosohma at gmail.com  Fri May 23 16:53:28 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:53:28 -0700 (PDT)
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <ac11238f-395e-4999-83ed-022649989d40@a70g2000hsh.googlegroups.com>

On May 23, 3:36?pm, davidj411 <davidj... at gmail.com> wrote:
> When you save an open file to a variable, you can re-use that variable
> for membership checking.
> it does not seem to be that way with the csv.reader function, even
> when set to a variable name.
>
> what is the best way to store the open CSV file in memory or do i need
> to open the file each time?
>
> example of open method on file object:
> fhandle=open(filename).readelines()
>
> example of csv.reader method:
> reader = csv.reader(open(csvfilename))
>
> here are my results:>>> reader = csv.reader(open('export.csv'))
> >>> for line in reader:
>
> ... ?print line
>
> <lots of data on page...>
>
> but when i try to iterate through it again, it appears to print
> nothing (no error either). the file is exhausted?
>
> >>> for line in reader:
>
> ... ?print line
> ...
>
> do i need to seek() the beginning of this file object ? any help is
> greatly appreciated here.

I think using seek() is what you need as it is currently starting on
the last line that it read, so to speak. You should have just tried
it...experimenting is part of the fun of Python, after all.

Mike


From tjreedy at udel.edu  Sat May 17 13:54:05 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 May 2008 13:54:05 -0400
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com><dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>
Message-ID: <g0n63t$7qm$1@ger.gmane.org>


"eliben" <eliben at gmail.com> wrote in message 
news:b439e7f0-685b-46b6-b0ea-3161cc548868 at m45g2000hsb.googlegroups.com...
| Is there a simple way to find out which packages are used by my
| script ?

Ggrep for import statements?
 (But that only only gives direct dependencies.)
Does py2exe have an option to output the list it collects?|
I think people have mentioned such here. 





From bruno.desthuilliers at gmail.com  Wed May  7 15:10:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 12:10:26 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<68e2a1F2s43b2U1@mid.individual.net>
Message-ID: <fa4f9ac4-e9ab-4326-bb0a-747bb7bbef5c@2g2000hsn.googlegroups.com>

On 7 mai, 18:05, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> jmDesktop wrote:
> > Studying OOP and noticed that Python does not have Interfaces.
>
> By "OOP", you mean "Java", right? 8)
>
> > Is that correct?  Is my schooling for nought on these OOP concepts
> > if I use Python.  Am I losing something if I don't use
> > the "typical" oop constructs found in other languages (Java, C#
> > come to mind.)
>
> AFAIK, Interfaces weren't "typical" before Java. CMIIW.
>
> BTW, Zope has interfaces. Not sure if it's exactly the same.
>
It isn't.


From ivan.illarionov at gmail.com  Mon May 26 18:24:14 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:24:14 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
Message-ID: <g1fdae$2cld$2@news.mtu.ru>

On Mon, 26 May 2008 15:18:00 -0700, Gandalf wrote:

> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
>> > Thanks!
>> > Anyone know which library should i learn then?
>>
>> Looks like you need to dive into Win32
>> APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://
msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
>> and others
>> combined with ctypes.
>>
>> Ivan
> 
> well, that seems extremely valuable but how can i implement those
> functions with python?

Google is your friend
Some links with examples:
http://www.brunningonline.net/simon/blog/archives/000652.html
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/208699


From ivan.illarionov at gmail.com  Mon May 26 14:54:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 18:54:50 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com>
Message-ID: <g1f11p$2a08$1@news.mtu.ru>

Sebastian 'lunar' Wiesner wrote:

>>> Modern frameworks like Django or Grok require a somewhat great
>>> adaption, since they strongly restrict the programmer's freedom.  I
>>> doubt, that you would get Django or Grok working like your asp
>>> framework.
>> 
>> Actually, modern frameworks (at least Djagno) does not "restrict the
>> programmer's freedom", they only encourage clean design.
> 
> Can we agree on the fact, that Django _encourages clean design_ by
> _restricting the programmers freedom to some degree_?  This comprise
> would avoid an endless war about framework philosophy ;)  (and isn't so
> far from the truth, btw)

Yes, it makes very little sense to not follow conventions in Django. I 
have no problem with some people call it "some degree of restriction" ;)

If the OP wants PHP-style programming he will get better results with PHP 
because PHP was designed this way. Any Pythonic solution will be an 
overkill.

Ivan


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:16:56 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:16:56 +0200
Subject: explain this function to me, lambda confusion
In-Reply-To: <K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
Message-ID: <48315398$0$14949$426a34cc@news.free.fr>

inhahe a ?crit :
>> Both the responses offer lambda free alternatives. That's fine, and
>> given the terse documentation and problems that I had understanding
>> them, I would agree. So what applications are lambdas suited to? I
>> think the parameterised function model is one.
>> What else?
> 
> i've hardly ever used lambdas since map() and filter() were replaced by list 
> comprehension.  two other uses I can think of for it are: using it as a 
> sorting key (which takes a function and lambdas are perfect for that when a 
> direct function isn't available. for example, lambda x: x.myName),

import operator
foos.sort(key=operator.attrgetter('myName'))




From gagsl-py2 at yahoo.com.ar  Mon May 12 02:25:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:25:41 -0300
Subject: cgitb performance issue
References: <481F585A.5080707@admailinc.com>
Message-ID: <op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman <efurman at admailinc.com> escribi?:

> I tried adding a form to our website for uploading large files.
> Personally, I dislike the forms that tell you you did something wrong
> and make you re-enter *all* your data again, so this one cycles and
> remembers your answers, and only prompts for the file once the rest of
> the entered data is good.  However, the first time the form loads it can
> take up to 30 seconds... any ideas why?

Hard to tell without looking at the code... And what has cgitb to do with this?

-- 
Gabriel Genellina



From tarun.kap at gmail.com  Mon May  5 14:11:19 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 11:11:19 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com> 
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
Message-ID: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>

On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>
> > Mike Driscoll wrote:
> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
> > >> I need to do SSL file transfer using python? Is there a library i can
> > >> use ?
>
> > >http://sandbox.rulemaker.net/ngps/m2/
>
> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> > --
> >   Heikki Toivonen
>
> Whoops...I just went with the first link Google gave me. The link I
> gave doesn't mention that the project has moved. Looks like the one
> you link to is the 9th link on my Google search using the terms:
> "python m2crypto".
>
> Sorry if I spread misinformation though.
>
> Mike

ok i have tried around a lot but no luck. I think M2Crypto is my best
option except it requires a minimum of python 2.4 which i don't have.

What i am trying to do is to do an FTP transfer that uses SSL
(username, password authentication) and not a certificate file. The
few example i have found of the Openssl module use a certificate for
authentication unlike what i want to do.

Anyone has any ideas ?


From wuwei23 at gmail.com  Mon May 26 19:24:20 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 16:24:20 -0700 (PDT)
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <25ad2c27-1a79-4402-99de-034fc2d59f77@v26g2000prm.googlegroups.com>

On May 27, 8:39 am, Jean-Claude Neveu <jcn-france1... at pobox.com>
wrote:
> I tried to do this by using in the i loop the line:
>
>         message = email.message_from_file(j)
>
> but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

Heya,

The email module has a second function - 'message_from_string' - which
might be more useful here. Currently, you're passing to
'message_from_file' a string that it tries to treat as a file, hence
it complaining about the string object not having part of the file
object interface.

(I've never used email or poplib, so this is just a guess...)

- alex23


From ethan at stoneleaf.us  Fri May 30 16:46:52 2008
From: ethan at stoneleaf.us (Ethan Furman)
Date: Fri, 30 May 2008 12:46:52 -0800
Subject: php vs python
Message-ID: <484067BC.6090005@stoneleaf.us>

Jerry Stuckle wrote:

 >
 > As I've said before - good programmers can write good code in any
 > language.
 >

So... an eloquent speaker of English is also an eloquent speaker of 
Spanish/French/German?

I think your statement would be correct if worded: some programmers can 
write good code in any language.  There's a reason why computer coding 
paradigms are called 'languages' -- because they are, and as such they 
require different ways of thinking.  Just because someone is good at 
playing pianos doesn't mean they are also good at wood carving.  Just 
because someone is good (i.e. writes good code) in C / PHP / Python / 
Perl / Assembly / whatever does not inherently mean that that same 
person will be able to write good code in any other language.  That's 
one reason why there are so many to choose from: different people think 
differently and most are only optimal in certain areas.

Or perhaps your definition of a good programmer means somebody who can 
write good code in any language?  What then is a programmer who can only 
write good code in a handful of languages?  Or maybe only two languages? 
   Or even only one?

My definition of a good programmer is someone who can write good code in 
a computer language.  I would use the word 'versatile' or even 
'multi-lingual' to broaden the scope to more than one language.
--
Ethan

P.S.
My apologies, Jerry, for writing back to you directly -- I haven't yet 
discovered how to post to newsgroups, and I do not know the php mailing 
list address.  I guess by both our definitions I am not a 'good 
newsgroup poster.'  ;-)



From grante at visi.com  Wed May  7 12:21:48 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 07 May 2008 11:21:48 -0500
Subject: listening on TCP port
References: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>
Message-ID: <hJKdnXg_Bf2BSrzVnZ2dnUVZ_tvinZ2d@visi>

On 2008-05-07, petr.poupa at gmail.com <petr.poupa at gmail.com> wrote:

> is there anybody who has experience with listening on TCP port
> with python? I am looking for anything codes, tutorials,... .


http://docs.python.org/lib/module-socket.html

-- 
Grant Edwards                   grante             Yow! With YOU, I can be
                                  at               MYSELF ...  We don't NEED
                               visi.com            Dan Rather ...


From afrobeard at gmail.com  Thu May 15 17:51:48 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 14:51:48 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
Message-ID: <781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>

Arnaud's code wont work if self.opt1 is None, an empty list, an empty
tuple, False, etc, because all these evaluate to false. They wont
print the internal state of these variables. [Just an informational
notice, this may be the behavior you expect]

Secondly, I'm not sure if you know the variable names from before hand
in which case Casey's approach will work, or you need to know them via
introspection. http://www.ibm.com/developerworks/library/l-pyint.html
[Scroll down to attributes].

On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Casey <casey.mcgi... at gmail.com> writes:
> > Hi,
>
> > I have some classes that print variable outputs depending on their
> > internal state, like so:
>
> > def __str__(self):
> > ? ? out = []
> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
> > ? ? ....
> > ? ? return '\n'.join(out)
>
> > Is there any way to make this cleaner?
>
> Maybe.
>
> Have a dictionary of options rather than individual attributes;
> options not in the dictionary are not set. E.g.
>
> mask = {
> ? ? 'opt1': 'option 1 is %s',
> ? ? 'opt2': 'option 2 is %s',
> ? ? ...
> ? ? }
>
> def __str__(self):
> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>
> --
> Arnaud



From Graham.Dumpleton at gmail.com  Tue May 20 04:13:12 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Tue, 20 May 2008 01:13:12 -0700 (PDT)
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<pan.2008.05.20.00.58.50.596857@reidster.net> 
	<1fi434dog4u92tk7na5qhvfapl70mg8d93@4ax.com>
Message-ID: <6c980775-c761-45d3-aeee-7bb24ff14b57@k1g2000prb.googlegroups.com>

On May 20, 2:00?pm, James A. Donald <jam... at echeque.com> wrote:
> > > 2. ?It is not clear to me how a python web application scales. ?Python
> > > is inherently single threaded, so one will need lots of python
> > > processes on lots of computers, with the database software handling
> > > parallel accesses to the same or related data. ?One could organize it
> > > as one python program for each url, and one python process for each
> > > http request, but that involves a lot of overhead starting up and
> > > shutting down python processes. ?Or one could organize it as one
> > > python program for each url, but if one gets a lot of http requests
> > > for one url, a small number of python processes will each sequentially
> > > handle a large number of those requests. ?What I am really asking is:
> > > Are there python web frameworks that scale with hardware and how do
> > > they handle scaling?
>
> Reid Priedhorsky
>
> > This sounds like a good match for Apache withmod_python.
>
> I would hope that it is, but the question that I would like to know is
> how does mod_python handle the problem - how do python programs and
> processes relate to web pages and http requests when one is using mod_python, and what happens when one has quite a lot of web pages and
> a very large number of http requests?

Read:

  http://blog.dscpl.com.au/2007/09/parallel-python-discussion-and-modwsgi.html
  http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading

They talk about multi process nature of Apache and how GIL is not as
big a deal when using it.

The latter document explains the various process/threading modes when
using Apache/mod_wsgi. The embedded modes described in that
documentation also apply to mod_python.

The server is generally never the bottleneck, but if you are paranoid
about performance, then also look at relative comparison of mod_wsgi
and mod_python in:

  http://code.google.com/p/modwsgi/wiki/PerformanceEstimates

Graham



From dieter at handshake.de  Thu May  1 13:55:40 2008
From: dieter at handshake.de (Dieter Maurer)
Date: 01 May 2008 19:55:40 +0200
Subject: Tremendous slowdown due to garbage collection
In-Reply-To: <48161A65.6040705@animats.com>
References: <49b55bca-cbb8-4ac9-8720-4be87b930d5c@m3g2000hsc.googlegroups.com>
	<03594410-2463-430a-81b1-3005cc7e7bac@m44g2000hsc.googlegroups.com>
	<mailman.327.1208018876.17997.python-list@python.org>
	<mailman.257.1209316607.12834.python-list@python.org>
	<48161A65.6040705@animats.com>
Message-ID: <x7y76t52oz.fsf@handshake.de>

John Nagle <nagle at animats.com> writes on Mon, 28 Apr 2008 11:41:41 -0700:
> Dieter Maurer wrote:
> > Christian Heimes <lists at cheimes.de> writes on Sat, 12 Apr 2008 18:47:32 +0200:
> >> andreas.eisele at gmail.com schrieb:
> >>> which made me suggest to use these as defaults, but then
> 
> > We observed similar very bad behaviour -- in a Web application server.
> > Apparently, the standard behaviour is far from optimal when the
> > system contains a large number of objects and occationally, large
> > numbers of objects are created in a short time.
> > We have seen such behaviour during parsing of larger XML documents, for
> > example (in our Web application).
> 
>     Our solution to that was to modify BeautifulSoup to use weak pointers.
> All the pointers towards the root and towards previous parts of the
> document are "weak".  As a result, reference counting alone is sufficient
> to manage the tree.  We still keep GC enabled, but it doesn't find much
> to collect.

It will not help in our setup.

We, too, have almost no cycles -- but the GC does not know this:

  If a large number of objects are created temporarily and not released
  before the generation 1 threshoold is reached, then
  the garbage collector will start collections -- even, if there
  are no or very few cycles.
  A generation 2 garbage collection takes time proportional
  to the total number of (GC aware) objects -- independent of
  the number of cycles.

Dieter


From terry.yinzhe at gmail.com  Sun May 18 11:32:28 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 08:32:28 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
Message-ID: <24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>

On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> escribi?:
>
> > Is there a simple way to get all the instances of one class? I mean
> > without any additional change to the class.
>
> Try with gc.get_referrers()
>
> py> import gc
> py> class A(object): pass
> ...
> py> a,b,c = A(),A(),A()
> py> A
> <class __main__.A at 0x00A3F4E0>
> py> for item in gc.get_referrers(A): print type(item)
> ...
> <type 'getset_descriptor'>
> <type 'getset_descriptor'>
> <type 'tuple'>
> <class '__main__.A'>
> <class '__main__.A'>
> <class '__main__.A'>
> <type 'dict'>
> <type 'dict'>
>
> We need to filter that list, keeping only A's instances:
>
> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> <__main__.A object at 0x00A40E18>]
>
> --
> Gabriel Genellina

But I saw in the help that we should "Avoid using get_referrers() for
any purpose other than debugging. "


From ivan.illarionov at gmail.com  Tue May 27 03:36:20 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 27 May 2008 07:36:20 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
	<g1f2v2$129$01$1@news.t-online.com> <g1f40f$2avo$1@news.mtu.ru>
	<483bb3e9$0$5100$426a74cc@news.free.fr>
Message-ID: <g1gdlj$2j36$1@news.mtu.ru>

On Tue, 27 May 2008 09:10:40 +0200, Bruno Desthuilliers wrote:

> Ivan Illarionov a ?crit :
>> On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:
>> 
>>> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
>>>
>>>> If the OP wants PHP-style programming he will get better results with
>>>> PHP because PHP was designed this way. Any Pythonic solution will be
>>>> an overkill.
>>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>>> committing suicide by shooting yourself into the head with PHP ...
>> 
>> :) I can't imagine anything uglier than Python with its significant
>> whitespace wrapped inside HTML. I guess it could be more damaging than
>> PHP which was written exactly for this purpose.
> 
> Mako template's syntax looks not so ugly to me:
> 
> <%inherit file="base.html"/>
> <% rows = [[v for v in range(0,10)] for row in range(0,10)] %> <table>
>      % for row in rows:
>          ${makerow(row)}
>      % endfor
> </table>
> 
> <%def name="makerow(row)">
>      <tr>
>      % for name in row:
>          <td>${name}</td>\
>      % endfor
>      </tr>
> </%def>

Mako templates are alright. I like them more than Django templates.


From dave.g1234 at gmail.com  Fri May 16 14:44:11 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 11:44:11 -0700 (PDT)
Subject: namespaces and eval
Message-ID: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>

Suppose I have a function in module X that calls eval e.g,

X.py
_______
Def foo(bar):
        Eval(bar)
_______

Now eval will be called using the default eval(bar,globals(),locals())
and globals will pull in anything in module X.

Now I have module Y that calls bar like so
Y.py
________
from x import *
def biz():
        print "Im a silly example!"
Foo("biz()")
_______

Python will complain that it cannot find biz because it's not the X
module.

My question - is there any way to a) get a listing of active namespaes
search ALL active namespaces for a particular variable b) get the
namespace of the caller withing passing it in (here, Y) c) do anything
else to get biz without passing foo("biz()",locals(),globals()) or
hacking biz into the __builtin__ namespace(don't know if it's even
possible, but it defeats the purpose of what I'm trying to do) ?  I
realize this is here for a reason, but I'm working on something that's
kind of a hack already

Thanks
dave


More gratuitous context. Long story I'm trying to write a hack for a
concise way of adding arbitrary methods to objects for JPA/JQuery like
chaning eg.

def foo(self):


class wrap:
    def __init__(self, obj, globalz=globals(),localz= locals()):
        self.obj = obj
        self.localz = localz;
        self.globalz = globalz;

    def __callback__(self, *args, **kw):
        newargs = [self.obj];
        newargs.extend(args);
        print locals
        ret = eval(self.name, self.globalz, self.localz)
(*newargs,**kw);
        return wrap(ret);

    def __getattr__(self,name):
        if hasattr(self.obj,name):
            return getattr(self.obj,name);
        self.name = name;
        return self.__callback__;








From duncan.booth at invalid.invalid  Fri May  2 03:33:52 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 07:33:52 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
Message-ID: <Xns9A9255EE37A96duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:
> 
>> Of course it's not thread safe.   For the same reason and more basic, 
>> even the expression i++ is not thread safe in C++.
>> 
>> Any such calculation, on modern processors, requires three operations: 
>>   retrieve value of i into a register,
>>   increment the register
>>   write the value into i.
> 
> There are no modern processors with an opcode for incrementing a memory
> location!?  At least my C64 can do that.  ;-)
> 
The operation i++ in C/C++ implies two things: it increments the memory 
location and returns the new result. That means there are at least two ways 
to generate code for this:

   increment memory
   load new value

or

   load value
   incremenent
   store

Neither of these is going to be thread-safe (even on a C64) unless you 
protect the operations somehow. The latter is probably preferred as it only 
implies two operations to memory whereas the former implies three.

Even on your C64 incrementing a memory location involves both a read and a 
write, so if you have a multi-core C64(!) there is still scope for another 
processor to get into the middle of that increment instruction.



From yguan08 at gmail.com  Tue May 13 18:33:17 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 15:33:17 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
	<4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
	<482a16a5@news.mel.dft.com.au>
Message-ID: <1c952025-9673-490a-8282-37903fd70dfc@8g2000hse.googlegroups.com>

On May 13, 5:31?pm, John Machin <sjmac... at lexicon.net> wrote:
> ygua... at gmail.com wrote:
> > On May 13, 4:38 pm, John Machin <sjmac... at lexicon.net> wrote:
> >> ygua... at gmail.com wrote:
> >>> I have trouble of obtaining the file size of a file because the
> >>> fullpath exceeds 255 characters. I get this message with
> >> At the DOS command level, you can do
> >> ? ? ?subst x: very\long\path
> >> and then refer to
> >> ? ? ?x:filestem.ext
> >> where x is any unused drive letter.
> > Good idea. But subst does not see to work with path that has spaces.
> > It gives "Incorrect number of parameters"
>
> If any DOS command-line argument includes spaces, you need to quote it.
>
> os.system(r'subst x: "c:\my big fat path\rab oof\etc etc etc"')

Yes, it works now. I am getting more on windows after coming a long
way from Unix. Thanks a lot.


From dstanek at dstanek.com  Mon May 19 21:04:28 2008
From: dstanek at dstanek.com (David Stanek)
Date: Mon, 19 May 2008 21:04:28 -0400
Subject: scaling problems
In-Reply-To: <j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <de32cc030805191804n6c59271ft4012393721a9afa9@mail.gmail.com>

On Mon, May 19, 2008 at 8:47 PM, James A. Donald <jamesd at echeque.com> wrote:
> I am just getting into python, and know little about it, and am
> posting to ask on what beaches the salt water crocodiles hang out.
>
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.  I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

I can assure you that in practice this is not a problem. If you do
proper unit testing then you will catch many, if not all, of the
errors that static typing catches. There are also tools like PyLint,
PyFlakes and pep8.py will also catch many of those mistakes.


> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded, so one will need lots of python
> processes on lots of computers, with the database software handling
> parallel accesses to the same or related data.  One could organize it
> as one python program for each url, and one python process for each
> http request, but that involves a lot of overhead starting up and
> shutting down python processes.  Or one could organize it as one
> python program for each url, but if one gets a lot of http requests
> for one url, a small number of python processes will each sequentially
> handle a large number of those requests.  What I am really asking is:
> Are there python web frameworks that scale with hardware and how do
> they handle scaling?

What is the difference if you have a process with 10 threads or 10
separate processes running in parallel? Apache is a good example of a
server that may be configured to use multiple processes to handle
requests. And from what I hear is scales just fine.

I think you are looking at the problem wrong. The fundamentals are the
same between threads and processes. You simply have a pool of workers
that handle requests. Any process is capable of handling any request.
The key to scalability is that the processes are persistent and not
forked for each request.


> Please don't read this as "Python sucks, everyone should program in
> machine language expressed as binary numbers".  I am just asking where
> the problems are.

The only real problem I have had with process pools is that sharing
resources is harder. It is harder to create things like connection
pools.


-- 
David
http://www.traceback.org


From cjw at ncf.ca  Tue May 20 20:43:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Tue, 20 May 2008 20:43:01 -0400
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <48337015.80202@ncf.ca>

John Salerno wrote:
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. Here's 
> the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and it's 
> being used as everyone expects it to be used. In example 2, however, I began 
> to think this might be an abuse of list comprehensions, because I'm not 
> assigning the result to anything (nor am I even using the result in any 
> way).
> 
> What does everyone think about this? Should list comprehensions be used this 
> way, or should they only be used to actually create a new list that will 
> then be assigned to a variable/returned/etc.? 
> 
> 

Alternative ways of of looking at the 
problem are:

# compress.py
import sets

def compress(s):
     new = []
     [new.append(c) for c in s if c not 
in new]
     return ''.join(new)

def compress1(s):
   new= []
   d= dict(zip(s, len(s)*[[]]))
   return d.keys()

def compress2(st):
   s= sets.Set(st)
   return s

if __name__ == "__main__":
   s= 'In example 1, the intention to 
make an in-place change is explicit, and 
it is'
   print (compress(s))
   print (compress1(s))
   print (compress2(s))

Results:

In exampl1,thiok-cgsd
['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 
'k', '-', 'm', 'l', 'o', 'n', '1', 'p', 
's', 't', 'x', ',', 'd']
Set(['a', ' ', 'c', 'e', 'i', 'g', 'I', 
'h', 'k', '-', 'm', 'l', 'o', 'n', '1', 
'p', 's', 't', 'x', ',', 'd'])

Colin W.


From ivlenin at gmail.com  Tue May 13 19:30:22 2008
From: ivlenin at gmail.com (I V)
Date: Tue, 13 May 2008 23:30:22 GMT
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
Message-ID: <iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com>

On Wed, 14 May 2008 00:38:44 +0200, Christian Heimes wrote:
> Eric Anderson schrieb:
>> Seems like unnecessary code but obviously I know nothing about Python.
> 
> Correct, the truth example isn't a good example. "if argv" is better.

I hadn't heard of operator.truth before. Does it do anything different 
from bool(x) ?


From stefan_ml at behnel.de  Thu May 15 14:14:43 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 15 May 2008 20:14:43 +0200
Subject: Using file objects with elementtree
In-Reply-To: <dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
Message-ID: <482C7D93.2080809@behnel.de>

castironpi at gmail.com wrote:
> What do we render?

Sur.

Stefan


From mattheww at chiark.greenend.org.uk  Fri May 23 13:23:04 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 23 May 2008 18:23:04 +0100 (BST)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <C3q*E9Bds@news.chiark.greenend.org.uk>

John Salerno  <johnjsal at gmailNOSPAM.com> wrote:
> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

You probably could, but it's best not to unless you're somehow forced
to.

In practice, the interface that you want your 'logic' layer to provide
to the GUI is likely to depend on some of the details of how the GUI
works.

If you did the lower levels first without having any idea at all of
what you were going to do with the GUI, it's quite likely that you'd
find you'd written a few functions which turned out not to be needed at
all, or that some functionality that the GUI needs to use very
frequently is rather slow to execute, or that some functionality that
you thought belonged to the 'logic' is really better done in the GUI
layer, and so on and so forth.

For example, if you were writing the 'logic' for a chess program you
might choose a way of modelling the board that can't represent a
position with more than one black king. And then when you got round to
doing the GUI you might find out that your users would like to be able
to have this temporarily when setting up a position.

-M-


From johnjsal at NOSPAMgmail.com  Sun May 18 20:25:16 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 18 May 2008 20:25:16 -0400
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>
Message-ID: <20080518202516.e858910c.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 16:17:55 -0700 (PDT)
Mensanator <mensanator at aol.com> wrote:


> I see no need for GUI in any of these applications.

Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)

Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)


From upton at virginia.edu  Wed May 14 14:22:02 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 14 May 2008 14:22:02 -0400
Subject: I'm stuck in Python!
In-Reply-To: <e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
Message-ID: <5504f9ac0805141122k18ca0a57l2da0b95c4a76db41@mail.gmail.com>

On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwei23 at gmail.com> wrote:
> On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>> "George Sakkis" <george.sak... at gmail.com> wrote in message
>> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
>> > you can safely ignore its posts.
>>
>> How does it generate text?
>
> My guess is by inhaling a lot of intoxicants.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I assumed his message with the subject "bytes1.shuffle()" from a few
days ago was a glimpse into his source code.  Or something like it.


From gagsl-py2 at yahoo.com.ar  Sun May 18 04:49:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 05:49:33 -0300
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
	<r5RXj.48195$3v1.31693@bignews3.bellsouth.net>
Message-ID: <op.ubcdgvawx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 04:42:58 -0300, inhahe <inhahe at gmail.com> escribi?:

> To those who don't want me to feed the bot, I'm sorry.  It's not a bot, and
> I don't know the policy on having philosophical conversations.

If you manage to stay on topic...

-- 
Gabriel Genellina



From catphive at catphive.net  Thu May  1 22:17:34 2008
From: catphive at catphive.net (Brendan Miller)
Date: Thu, 1 May 2008 19:17:34 -0700
Subject: portable fork+exec/spawn
Message-ID: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>

I want to spawn a child process based on an external executable that I have
the path for. I then want to wait on that executable, and capture it's
output.

In the os module, fork is only supported on unix, but spawn is only
supported on windows.

The os.system call is implemented by calling the C system call, which is of
course inefficient and has portability gotchas because it calls the
underlying system shell (sh for unix, cmd for windows, and who knows what
on non unix, non windows platforms like VMS and mac os9). Most importantly,
os.system forces you to wait on the process.

Is there an actual portable means of asynchronously spawning a process and
getting a handle to it, being able to write stdin and read stdout, or does
everyone just write their own wrapper for fork and spawn?

Sorry if this post sounds a little complainy. I was just surprised to find
the os module lacking in portable abstractions over system services.

Brendan


From deets at nospam.web.de  Wed May  7 09:31:02 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 15:31:02 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org>
Message-ID: <68dp9jF2sko92U1@mid.uni-berlin.de>

pistacchio wrote:

> Mike Driscoll ha scritto:
>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>> my server side needs but i can't seem to find what i'm looking for. for
>>> most of my php work i use mysql and tinyButStrong
>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>> engine that offers powerful functionalities. you insert TBS tags in web
>>> pages like:
>>>
>>> <div align="center" class="title-page"> [var.x] </div>
>>>
>>> and it replaces [var.x] with the value of global variable x. it also
>>> makes blocks (and nested blocks) easy to implement:
>>>
>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>> [blk1;block=end] </p>
>>>
>>> in the previous code it cycles throu all the values of the array blk1.
>>>
>>> it does many more things, like htlm escaping, url and js encoding etc,
>>> conditional displaying etc, but it is not more confusing that inserting
>>> pieces of code into the HTML (aka: littering the code and kissing
>>> goodbye to the code/presentation separation). it comes in the form of a
>>> single file with a single class that you can easily include in the code
>>> and go.
>>>
>>> now, i've searched the net and it seems full of python-based frameworks
>>> for doing server side scripting and templating, but none that suits my
>>> needs.
>>>
>>>     1. i like writing code and i like control. i mean, open up the
>>> simplest text editor and write in it. i don't want something that is
>>> command-line driven or that writes code for me like ">>>
>>> makePagesFromThisDatabase()".
>>>     2. i want something very lightweight. i don't want dozen of options,
>>> pre-made blogging parts ecc. i just need a good non invasive template
>>> engine and the basic functions for server side scripting, like session
>>> managing, request parsing, functions to manipulate html code (encodings
>>> etc)
>>>     3. i don't want to beg my hosting provider to install the libraries.
>>> a simple include file should do the work.
>>>     4. object oriented programming is not required (better: i prefer
>>> plain old procedural programming).
>>>
>>> any help? thanks in advance
>> 
> 
> hi, thanks for replaying
> 
>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>> and Genshi in 2.x (I think) for templating purposes. There's also
>> Cheetah, one of the more powerful Python templating engines out there.
>> 
> 
> django is exacly the kind of giant i'm trying to avoid
> 
>> http://genshi.edgewall.org/
> 
> the first lines of the tutorial read:
> "First, make sure you have CherryPy 3.0.x installed"
> Now, cherrypy is something that is not properly "include a file and get
> going!"
>> http://www.kid-templating.org/
> 
> kid seems to have a non-linear approach, but i may give it a try
> 
>> http://www.cheetahtemplate.org/
> 
> cheetah was something that i already considered using. have i to
> "install" it or can i just import it?

You will need to install any of these. It is part of how python is designed.
Extendability comes with a price-tag.

 I don't know for sure, but I guess the cherrypy-requirement of genshi is
more for the tutorial, not for the templating itself.

Diez


From castironpi at gmail.com  Mon May 12 21:20:54 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:20:54 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
Message-ID: <5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>

On May 12, 8:18?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 7:12?pm, castiro... at gmail.com wrote:
>
> > Mine's been always messing up the color wheel.
>
> Messing up in what way? ?Are you using the colors to visualize
> something?

In a manner of speaking.  I'm a first-time-live Information scientist,
just out of work.  LIS at school and plenty of computer study, which
is fine.  Yes, I am trying to visualize something.


From alhanan_clinic at hotmail.com  Tue May  6 16:05:22 2008
From: alhanan_clinic at hotmail.com (Issam)
Date: Wed, 7 May 2008 00:05:22 +0400
Subject: Java or C++?
Message-ID: <BLU116-DAV177FAB976BAAC167A65A5F7D60@phx.gbl>

I need to help me.. please..
I have assingment for C++ programe
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From bruno.desthuilliers at gmail.com  Wed May 14 17:23:09 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:23:09 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <f0436997-a221-46f1-b376-b7407cb41607@f63g2000hsf.googlegroups.com>

On 13 mai, 19:05, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Just to support this statement: PHP runs an order of magnitude slower than
> > python. Yet a great deal (if not the majority) of dynamic sites out there
> > run under PHP. All of these are unhappy customers?
>
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.
>
Some of the slower websites I've seen where using Java - which is
supposedly way faster than Python. And even a static (pure HTML) web
site can become more than painfully slow if the server can't handle
the load, as anyone working in the field could tell you. But this is
obviously one more area where you are just totally clueless.



From rpm9deleteme at earthlink.net  Thu May 22 21:35:10 2008
From: rpm9deleteme at earthlink.net (RPM1)
Date: Thu, 22 May 2008 21:35:10 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
Message-ID: <g1570j$n8g$1@aioe.org>

Larry Bates wrote:
> If your Python program is 
> slow, you have almost assuredly approached it with a wrong method or 
> algorithm.

I agree for most applications.  There are however times where Python 
just isn't fast enough, and that's usually when people write extension 
modules.

I have yet to see a chess engine written in Python that is competitive 
with even a below average C or C++ chess engine.  The same could be said 
of Java, VB, C#, Pearl, ...

So there ARE some tasks that Python just isn't suited for due to 
performance, but not enough for it to steer anyone away from Python.

I have been working on a chess engine and have found that I prototype in 
Python and then port to the D programming language, (which IS fast). 
For example, one of my routines, (generating pseudo-legal moves -- no 
evaluation), in Python runs at 700,000 moves per second, (using Psyco). 
  Ported to D it runs at 22 million moves per second.

Python's advantage is in the software development and maintenance 
phases.  As long as the runtime phase is fast ENOUGH, Python kicks most 
other languages butts.

Patrick




From castironpi at gmail.com  Thu May 15 09:32:37 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 06:32:37 -0700 (PDT)
Subject: send yield
Message-ID: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>

Why can't I write this?


From grante at visi.com  Mon May  5 10:35:44 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 05 May 2008 09:35:44 -0500
Subject: Nested os.path.join()'s
References: <mailman.587.1209997341.12834.python-list@python.org>
Message-ID: <U6SdnXocuoHdhoLVnZ2dnUVZ_tfinZ2d@visi>

On 2008-05-05, Paul Scott <pscott at uwc.ac.za> wrote:

> Today, I needed to concatenate a bunch of directory paths and files
> together based on user input to create file paths. I achieved this
> through nested os.path.join()'s which I am unsure if this is a good
> thing or not.
>
> example:
>
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah

That's not an example of nested os.path.join()'s.

> Question is, is there a better way of doing this? 

I don't think so.

> The above *works* but it looks kinda hackish...

What about it do you think looks hackish?

I supposed you could do this instead:

  path = os.path.join(basedir,picdir)
  if os.path.exists(path) == True :
      blah blah

But I don't really see why that's any better.      

-- 
Grant Edwards                   grante             Yow! Like I always say
                                  at               -- nothing can beat
                               visi.com            the BRATWURST here in
                                                   DUSSELDORF!!


From bronger at physik.rwth-aachen.de  Fri May  2 11:01:12 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 17:01:12 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<87y76ssrx0.fsf@physik.rwth-aachen.de>
	<mailman.458.1209739971.12834.python-list@python.org>
Message-ID: <87tzhgsqbr.fsf@physik.rwth-aachen.de>

Hall?chen!

D'Arcy J.M. Cain writes:

> On Fri, 02 May 2008 16:26:51 +0200
> Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>>> Certainly #! /usr/bin/python is fine if you never expect your
>>> software to run outside of your own little corner of the world
>>> but you asked why people prefer the env version and the answer
>>> is that we want to write software that runs everywhere that
>>> Python runs.
>> 
>> Granted, but you must draw the line somewhere anyway.  I cannot
>
> No one is talking about if statements here.

Sorry to become laconical, but your reply was so, too:
http://en.wikipedia.org/wiki/Abstraction

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From Fdateyhj at gmail.com  Sat May 10 17:21:20 2008
From: Fdateyhj at gmail.com (law)
Date: Sat, 10 May 2008 14:21:20 -0700 (PDT)
Subject: =?windows-1252?Q?Special_INFORMATION_=96_a_must_read?=
Message-ID: <8ed93ac5-37e6-4347-ba46-ceb3d99d1a59@26g2000hsk.googlegroups.com>


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You may look at this important INFO, view the short but interesting
movies, and even share with others. Interestingly, Registration for
all these is FREE.
Nkaw


From marco at sferacarta.com  Tue May  6 08:15:33 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 14:15:33 +0200
Subject: parameters to lambda's executed at run time.
In-Reply-To: <48203672$1_4@news.bluewin.ch>
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
	<48203672$1_4@news.bluewin.ch>
Message-ID: <IZXTj.33430$o06.12996@tornado.fastwebnet.it>

Boris Borcic wrote:

> One way :
> 
>  >>> from functools import partial
>  >>> def func(item) : print item
> 
>  >>> llist = [partial(func,item) for item in range(5)]
>  >>> for thing in llist : thing()
> 
> 0
> 1
> 2
> 3
> 4

Another way:


class Func(object):
     def __init__(self, item):
         self.item = item
     def __call__(self):
         print self.item

llist = [Func(item) for item in range(5)]
for thing in llist: thing()



From george.sakkis at gmail.com  Mon May 12 21:52:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 18:52:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
Message-ID: <761a3c96-3faf-4347-aeb7-4ca9cba67e42@a23g2000hsc.googlegroups.com>

On May 12, 7:03?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:

> Carl Banks <pavlovevide... at gmail.com> writes:
> > IMHO, whether a varibale is used or not has got to be one of the least
> > important things of all (in no small part because it's easily
> > discernable from nearby code).
>
> I couldn't disagree more.
>
> If you're binding a name to a value that will never be used, you're
> doing me (the reader of the code) a great favour if you indicate
> clearly and concisely that this value is not intended to be referenced
> anywhere else. Saving time for the reader is a very important job of
> the writer of code.

If you push this logic too far, you should del every name immediately
after the last statement it is used in the scope. I would generally
find less readable some code spread with del every few lines, micro-
managing the effective scope of each name. YMMV.

George


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 06:36:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 12:36:34 +0200
Subject: List behaviour
In-Reply-To: <mailman.1154.1210846212.12834.python-list@python.org>
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <482c1226$0$28403$426a34cc@news.free.fr>

Gabriel a ?crit :
> Hi all
> 
> Just wondering if someone could clarify this behaviour for me, please?
> 
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
> 
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]

The problem here is that your first statement

#>>> tasks = [[]]*6

creates a list (task) containing 6 references to the *same* (empty) list 
object. You can check this easily using the identity test operator 'is':

#>>> tasks[0] is tasks[1]
True


In fact, it's exactly as if you had written:

#>>> task = []
#>>> tasks = []
#>>> for i in range(6):
#...     tasks.append(task)
#...

If you want 6 different list objects in tasks, you can use a list 
comprehension instead:

#>>> tasks = [[] for i in range(6)]
#>>> tasks
[[], [], [], [], [], []]
#>>> tasks[0].append(1)
#>>> tasks
[[1], [], [], [], [], []]

HTH


From christof.ecker at googlemail.com  Fri May 23 09:43:33 2008
From: christof.ecker at googlemail.com (christof)
Date: Fri, 23 May 2008 06:43:33 -0700 (PDT)
Subject: KeyError in pickle
References: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com> 
	<g160ce$r41$01$1@news.t-online.com>
Message-ID: <972ec25f-4ff5-48d6-8c10-7578584d76d7@8g2000hse.googlegroups.com>

On 23 Mai, 10:48, Peter Otten <__pete... at web.de> wrote:
> christof wrote:
> > I am using pickle/unpickle to let my program save its documents to
> > disk. While this it worked stable for a long time, one of my users now
> > complained, that he had a file which can't be loaded.
>
> > The traceback is:
>
> >     File "pickle.pyo", line 1374, in loads
> >     File "pickle.pyo", line 858, in load
> > KeyError: 'A'
>
> > Does anybody know this problem. How this can happen and how can I
> > avoid it?
>
> Is this reproducible? How? If not I would guess that the file is corrupted.
>
> Peter

I found the problem: the user did a text export and gave the exported
file the wrong extension. So: the file was not valid python pickle. I
should add a type signature to fhe file format to avoid this.

Thanks anyway,
Christof


From skanemupp at yahoo.se  Thu May 15 13:04:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 10:04:08 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
Message-ID: <6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com>

when i try to write to the file...

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
<module>
    d.write('hej du galne kock')
IOError: [Errno 0] Error


From a.harrowell at gmail.com  Thu May 29 10:17:12 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 07:17:12 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
	<138c1ce9-80b1-4123-b88d-364055f63d78@i18g2000prn.googlegroups.com>
Message-ID: <908ec1ac-b449-4c99-9f09-5018bc13d4f4@l42g2000hsc.googlegroups.com>

On May 29, 2:24 pm, alex23 <wuwe... at gmail.com> wrote:
> On May 29, 11:09 pm, TYR <a.harrow... at gmail.com> wrote:
>
>
>
> > I'm doing some data normalisation, which involves data from a Web site
> > being extracted with BeautifulSoup, cleaned up with a regex, then
> > having the current year as returned by time()'s tm_year attribute
> > inserted, before the data is concatenated with string.join() and fed
> > to time.strptime().
>
> > Here's some code:
> > timeinput = re.split('[\s:-]', rawtime)
> > print timeinput #trace statement
> > print year #trace statement
> > t = timeinput.insert(2, year)
> > print t #trace statement
> > t1 = string.join(t, '')
> > timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> > year is a Unicode string; so is the data in rawtime (BeautifulSoup
> > gives you Unicode, dammit). And here's the output:
>
> > [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> > 2008 (OK, so the year is a year)
> > None (...but what's this?)
> > Traceback (most recent call last):
> >   File "bothv2.py", line 71, in <module>
> >     t1 = string.join(t, '')
> >   File "/usr/lib/python2.5/string.py", line 316, in join
> >     return sep.join(words)
> > TypeError
>
> list.insert modifies the list in-place:
>
> >>> l = [1,2,3]
> >>> l.insert(2,4)
> >>> l
>
> [1, 2, 4, 3]
>
> It also returns None, which is what you're assigning to 't' and then
> trying to join.
>
> Replace your usage of 't' with 'timeinput' and it should work.

Thank you.


From tjreedy at udel.edu  Fri May  9 15:53:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:53:13 -0400
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <g02a35$jq2$1@ger.gmane.org>


"XLiIV" <Tymoteusz.Jankowski at gmail.com> wrote in message 
news:68618c8b-f17e-496a-9092-5e2cd16b365b at p25g2000hsf.googlegroups.com...

Pipelining works best when all functions have just one input.
But that is a small subset of actual programs. 





From Lie.1296 at gmail.com  Fri May 16 16:56:10 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 16 May 2008 13:56:10 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com> 
	<3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com> 
	<6895c7ef-7886-4cf4-b558-a869a4bb9d06@z24g2000prf.googlegroups.com>
Message-ID: <aad8268c-dd74-41bd-975d-a43a62bfd6bb@l28g2000prd.googlegroups.com>

On May 17, 2:06?am, Lie <Lie.1... at gmail.com> wrote:
> On May 9, 7:36?pm, Unknown Hero <unknown_hero... at hotmail.com> wrote:> Ah, never mind, got it to work. Here's the code now. I hope I won't
> > run into another problems later :D
>
> > <code snippet>
> > #Goes through all keys and subkeys in the selected hive (defined as
> > root) and replaces the value 'old' with the value 'new'
> > #
> > #IMPORTANT! You should always back up the registry before attempting
> > to modify it.
> > #The author of this script CANNOT BE HELD RESPONSIVE for any damage
> > caused by running this script.
>
> (snip)
>
> One thing though, the disclaimer should not said the author cannot be
> held responsive, or you would be Windows that is not responsive all
> the times. I think it should say "responsible".
>
> I'm quite confused though, the code could be made simpler by dozens
> using Python's high-level functionalities. Particularly the lengthy
> code that checked whether the string contained a substring and replace
> the substring with new could be done easily (and faster) using
> python's in and replace function. I'll post the code later when I
> finished checking places where the codes could be simplified, and I'll
> also polish the entry code and a few other things (and pythonify the
> code according to the PEP 8's guide lines).

The tidied code ++

'''
Goes through all keys and subkeys in the selected hive (defined
as root) and replaces the value 'old' with the value 'new'

IMPORTANT! You should always back up the registry before
attempting to modify it. The author of this script CANNOT BE
HELD RESPONSIBLE for any damage caused by running this script.

You can call the script from a command line and pass two or
three values: HIVE, OLD, and NEW.

OLD and NEW can be any string value
HIVE has to be one of the following:

HKEY_LOCAL_MACHINE / HKLM
HKEY_CURRENT_USER / HKCU
HKEY_CLASSES_ROOT / HKCR
HKEY_USERS / HKU
HKEY_CURRENT_CONFIG / HKCC

If NEW is not specified, values that matches OLD will be replaced
with empty string (i.e. deleted)
'''

import _winreg
import sys

HIVES = {
    "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
    "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
    "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
    "HKEY_USERS" : _winreg.HKEY_USERS,
    "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG,
}

AccessError = False

class RegKey(object):
    def __init__ (self, name, key):
        self.name = name
        self.key = key

    def __str__ (self):
        return self.name

def walk(top):
    """ Walk through each key, subkey, and values

    Walk the registry starting from the key top
    in the form HIVE\\key\\subkey\\..\\subkey and generating
    key, subkey_names, values at each level.

    key is a lightly wrapped registry key, including the name
    and the HKEY object.
    subkey_names are simply names of the subkeys of that key
    values are 3-tuples containing (name, data, data-type).
    See the documentation for _winreg.EnumValue for more details.
    """

    try:
        if "\\" not in top:
            top += "\\"
        root, subkey = top.split ("\\", 1)
        key = _winreg.OpenKey(HIVES[root],
                              subkey,
                              0,
                              _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)

        subkeys = []
        i = 0
        while True:
            try:
                subkeys.append(_winreg.EnumKey(key, i))
                i += 1
            except EnvironmentError:
                break

        values = []
        i = 0
        while True:
            try:
                values.append(_winreg.EnumValue(key, i))
                i += 1
            except EnvironmentError:
                break

        yield RegKey(top, key), subkeys, values

        for subkey in subkeys:
            for result in walk(top + "\\" + subkey):
                yield result

    except WindowsError:
        global AccessError
        AccessError = True



def main(start, startHandle, old, new):
    basickeys = []
    i = 0
    while True:
        try:
            basickeys.append(_winreg.EnumKey(startHandle, i))
            i += 1
        except EnvironmentError:
            break

    for x in basickeys:
        for key, subkey_names, values in walk(start + "\\" + x):
            for (name, data, type) in values:
                if type == _winreg.REG_SZ:
                    if old in data:
                        winreg.SetValueEx(key.key,
                                          name,
                                          0,
                                          type,
                                          data.replace(old, new))
                        print key.key, name, 0, type,
data.replace(old, new)

def help():
    #Show help
    print '''
    USAGE: Registry.py HIVE OLD [NEW]
        HIVE: The root key in registry you want to go through.
            HKEY_CLASSES_ROOT / HKCR
            HKEY_CURRENT_USER / HKCU
            HKEY_LOCAL_MACHINE / HKLM
            HKEY_USERS / HKU
            HKEY_CURRENT_CONFIG / HKCC

        OLD: The value to search for.
            Wrap multiword strings with "".

        NEW: The value which will replace OLD.
            Wrap multiword strings with "".
            If not supplied, it default to empty string
            which means delete all occurence of OLD
            in the registry.

    '''
if __name__ == '__main__':
    if len(sys.argv) < 3 or len(sys.argv) > 4:
        print 'Invalid Number of Arguments'
        help()
        exit()

    ## Root Hive
    try:
        start = {
            'HKCU'                : 'HKEY_CURRENT_USER',
            'HKLM'                : 'HKEY_LOCAL_MACHINE',
            'HKCR'                : 'HKEY_CLASSES_ROOT',
            'HKU'                 : 'HKEY_USERS',
            'HKCC'                : 'HKEY_CURRENT_CONFIG',
        }[sys.argv[1].upper()]
    except KeyError:
        start = sys.argv[1].upper()
    try:

        startHandle = {
            'HKEY_CURRENT_USER'   : _winreg.HKEY_CURRENT_USER,
            'HKEY_LOCAL_MACHINE'  : _winreg.HKEY_LOCAL_MACHINE,
            'HKEY_CLASSES_ROOT'   : _winreg.HKEY_CLASSES_ROOT,
            'HKEY_USERS'          : _winreg.HKEY_USERS,
            'HKEY_CURRENT_CONFIG' : _winreg.HKEY_CURRENT_CONFIG,
        }[start]
    except KeyError:
        print >> sys.stderr, 'Invalid Hive'
        help()
        exit()

    ## The substring to be replaced
    old = sys.argv[2]

    ## The replacement string
    try:
        new = sys.argv[3]
    except:
        new = ''
    main(start, startHandle, old, new)
    if AccessError:
        print '''
Some keys cannot be changed because you don't have the appropriate
permission to modify those keys, please try again with a suitable
user account.
        '''



From spectrumdt at gmail.com  Fri May  9 06:19:03 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 03:19:03 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>


Thanks for the replies.

On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> Ctrl+C often works with Python, but as with any language, it's possible
> to write a program which will not respond to it. ?You can use Ctrl+\
> instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> Ctrl+\ sends SIGQUIT which typically isn't)

Yes, thank you, this seems to work. :)

I did some more testing and found out that the problem seems to be
thread-related. If I have a single-threaded program, then Ctrl+C
usually works, but if I have threads, it is usually ignored. For
instance, the below program does not respond to Ctrl+C (but it does
die when issued Ctrl+\):



import threading

def loop():
  while True:
    pass

threading.Thread(target=loop,args=()).start()


From d3vvnull at gmail.com  Sat May  3 12:30:54 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Sat, 3 May 2008 11:30:54 -0500
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <pecora-D066F9.11241203052008@ra.nrl.navy.mil>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
	<A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>
	<pecora-D066F9.11241203052008@ra.nrl.navy.mil>
Message-ID: <170543c70805030930u5130cb42w5b55248038f42997@mail.gmail.com>

I work on an AIX system where /usr/bin and /usr/local/bin apps can only be
installed by root. Our system doesn't have python or many other tools we
like to use installed so we have to install python in an alternate directory
location. We have a system installation of Perl installed, but it's a
release or two older than what we need, so we have done the same for perl.
Thus, #!/usr/bin/env whatever allows our developers to experiment without
always requiring the services of the admins, who are spread too thinly
amongst all the other *Nixes they have to support, and who are also
separated by many layers of red tape from us.

On Sat, May 3, 2008 at 10:24 AM, Lou Pecora <pecora at anvil.nrl.navy.mil>
wrote:

> In article <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d at visi>,
>  Grant Edwards <grante at visi.com> wrote:
>
> > On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> > > On Sat, 03 May 2008 00:44:00 +1000
> > > Ben Finney <bignose+hates-spam at benfinney.id.au<bignose%2Bhates-spam at benfinney.id.au>>
> wrote:
> > >> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> > >> > As someone else pointed out, not all the world is Linux.
> > >>
> > >> It's a good thing I've never implied such to be the case.
> > >
> > > You haven't *said* it but you have definitely *implied* it.
> > > Installing Python in /usr/bin is not common.
> >
> > It is common.  That's where it's installed by almost all Linux
> > distributions.
>
> MacOS X system python (or links to them) is in the same place.
>
> --
> -- Lou Pecora
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From wuwei23 at gmail.com  Thu May 29 07:45:06 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 04:45:06 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <4dadfe24-4c0c-4bd3-8e7c-d3d8ab2ef911@g16g2000pri.googlegroups.com>

On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

>>> file1 = set((x for x in open('file1')))
>>> file2 = set((x for x in open('file2')))
>>> file3 = file2.difference(file1)
>>> open('file3','w').writelines(file3)


From stef.mientki at gmail.com  Sun May 18 17:15:10 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sun, 18 May 2008 23:15:10 +0200
Subject: multiple databases, what's the best interface ?
In-Reply-To: <483021A3.9060908@egenix.com>
References: <482F29DF.2040804@gmail.com> <483021A3.9060908@egenix.com>
Message-ID: <48309C5E.5060902@gmail.com>

thanks guys,
I'll take a look at your suggestions.
cheers,
Stef

M.-A. Lemburg wrote:
> On 2008-05-17 20:54, Stef Mientki wrote:
>> hello,
>>
>> I need to switch fluently between 2 or 3 types of dbases:
>> SQLite, Sybase ( and in the future MS SQL-server).
>>
>> I need both closed application and general purpose database manager,
>> which should run on different platforms (windows, windows mobile, not 
>> web based).
>>
>> I would like to write the applications in Python.
>> What's the best interface so I can use the same program for all 
>> databases,
>> and just have to change the database name, if I want to use another 
>> database ?
>
> If you need a common interface on all the platforms, then I'd suggest
> you have a look at our mxODBC:
>
> http://www.egenix.com/products/python/mxODBC/
>
> If you also need to support Windows Mobile, then you'll be interested
> in our upcoming new product called "mxODBC Connect" which separates
> the client from the server.
>
> mxODBC Connect allows using the mxODBC API on platforms which don't
> come with ODBC drivers or where getting ODBC drivers is difficult.
> Due to it's client-server approach it also simplifies configuration
> a lot.
>



From mail at timgolden.me.uk  Tue May  6 07:44:49 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 12:44:49 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
Message-ID: <482044B1.5040906@timgolden.me.uk>

Unknown Hero wrote:
> Hi everyone!
> 
> Well, I have this need for a Python script that will scan through a
> selected hive (like HKEY_LOCAL_MACHINE) and replace all strings that
> contain word xxx (IE. foo) with yyy (IE. moo). I do not want partial
> results, but rather complete strings (no foome or the like, just foo).
> 
> 
> I have a basic understanding of Python, but this is beyond my skills.
> 
> I was looking for something like this:
> 
> open key (HKEY_LOCAL_MACHINE)
> while (not end of list)
>   open next subkey
>   search subkey for value (old)
>   SetValue(key, subkey, REG_SZ, new)
>   close subkey
> end while
> close key

In a spirit of teaching people to fish...

... If you put something like "Python windows registry" into Google, you
get quite a few hits, the top one of which is probably pointing to the stdlib
_winreg module, but several others point towards wrapper classes, modules
etc. which provide a simpler or at least a different interface to the registry.

Have a look at those and see if you can't work out what to do.

TJG


From darcy at druid.net  Wed May 28 06:39:12 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 28 May 2008 06:39:12 -0400
Subject: A quick question
In-Reply-To: <g1jbtt+bf6m@eGroups.com>
References: <g1jbtt+bf6m@eGroups.com>
Message-ID: <20080528063912.3a10053b.darcy@druid.net>

On Wed, 28 May 2008 10:25:01 -0000
"James" <cobrocks at msn.com> wrote:
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  
> How can I get these integers to print as letters?  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  

Try "for letter in start:"

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From guptaabhishek1983 at gmail.com  Thu May 29 15:38:22 2008
From: guptaabhishek1983 at gmail.com (abhishek)
Date: Thu, 29 May 2008 12:38:22 -0700 (PDT)
Subject: Help needed in choosing an algorithm for Cryptographic services.
Message-ID: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>

Hi group, recently my employer asked me too implement encryption/
decryption for secure data transfer over internet. Problem is that the
client application is written using C# and the webserver where i need
to store the information is developed using python.

My situation of dilemma is which cryptographic method suits me best
for this purpose.

Help/Suggestions are urgently required

Thank you ,
Abhishek


From tjreedy at udel.edu  Fri May 16 19:46:52 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 19:46:52 -0400
Subject: can't delete from a dictionary in a loop
References: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
Message-ID: <g0l6dd$d1p$1@ger.gmane.org>


"Dan Upton" <upton at virginia.edu> wrote in message 
news:5504f9ac0805161422r31f3a0d6sbe4e49914ade7383 at mail.gmail.com...
| RuntimeError: dictionary changed size during iteration

If you do not actually need a dict, an explicitly managed list is an 
[untested]alternative.

maxproc = #
procs = []
while True:
  if len(procs) < maxproc: [populate procs up to maxproc]
  i, nprocs = 0, len(procs)
  if not nprocs: break
  while i < nprocs:
    if terminated(procs[i]):
      del procs[i]
      nprocs -= 1
    else:
       i += 1

I am assuming that maxproc is low enough that the O(n) behavior of deletion 
is inconsequential.

tjr





From pavlovevidence at gmail.com  Wed May 21 21:01:53 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 18:01:53 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>

On May 21, 4:56 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
> > My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

Having done much mathematical and scientific prorgamming in my day, I
would say your opinion is dead wrong.

The crucial thing is not to slow down the calculations with useless
bells and whistles.  Scientists and engineers are smart enough to use
more precision than we need, and we don't really need that much.  For
instance, the simulations I run at work all use single precision (six
decimal digits) even though double precision is allowed.


Carl Banks


From jpthing at online.no  Fri May 30 16:03:37 2008
From: jpthing at online.no (John Thingstad)
Date: Fri, 30 May 2008 22:03:37 +0200
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
Message-ID: <op.ubzgobgsut4oq5@pandora.alfanett.no>

P? Fri, 30 May 2008 02:56:37 +0200, skrev David Combs <dkcombs at panix.com>:

> In article <rem-2008may08-005 at yahoo.com>,
> Robert Maas, http://tinyurl.com/uh3t  
> <usenet1.3.CalRobert at SpamGourmet.Com> wrote:
>>> From: "xah... at gmail.com" <xah... at gmail.com>
>>> the importance of naming of functions.
>>
>
> Lisp is *so* early a language (1960?), preceeded mainly only by Fortran  
> (1957?)?,
> and for sure the far-and-away the first as a platform for *so many*  
> concepts
> of computer-science, eg lexical vs dynamic ("special") variables, passing
> *unnamed* functions as args (could Algol 60 also do something like that,
> via something it maybe termed a "thunk"), maybe is still the only one
> in which program and data have the same representation -- that it'd
> seem logical to use it's terminology in all languages.
>
> From C is the very nice distinction between "formal" and "actual" args.
>
> And from algol-60, own and local -- own sure beats "static"!
>
> And so on.
>
>
> To me, it's too bad that that hacker-supreme (and certified genius)
> Larry W. likes to make up his own terminology for Perl.  Sure makes
> for a lot of otherwise-unnecessary pages in the various Perl texts,
> as well as posts here.
>
> Of course, a whole lot better his terminology than no language at all!
>
>
> David
>
>

Perl is solidly based in the UNIX world on awk, sed, bash and C.
I don't like the style, but many do.

--------------
John Thingstad


From deets at nospam.web.de  Wed May 21 18:21:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 00:21:38 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
Message-ID: <69jlk4F330nmpU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 21, 3:19 pm, "Dan Upton" <up... at virginia.edu> wrote:
>> The fact is, sometimes it's better to get it fast and be good enough,
>> where you can use whatever methods you want to deal with rounding
>> error accumulation.
> 
> I agree.
> 
> I also think that the precision/speed tradeoff should be under user
> control -- not at the whim of the compiler writer.  So, for example,
> if a user says:
> 
>       Set realdecimaldigits to 10.
> 
> then it's okay to use hardware double precision, but if they say:
> 
>       Set realdecimaldigits to 100.
> 
> then it's not.  The user should always be able to specify the
> precision and the rounding mode, and the program should always provide
> correct results to those specifications.

Which is exactly what the python decimal module does.

Diez


From gabriel.hasbun at gmail.com  Tue May  6 00:00:24 2008
From: gabriel.hasbun at gmail.com (Gasto)
Date: Mon, 5 May 2008 21:00:24 -0700 (PDT)
Subject: Decimal vs Float comparasion
References: <mailman.625.1210045932.12834.python-list@python.org>
Message-ID: <e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>

I still don't see why such a module exists.

 On 5 mayo, 21:52, "Yuan HOng" <hongyuan1... at gmail.com> wrote:
> Hi,
>
> It seems decimal object will always be larger than float in
> comparasion, which goes against common sense:
>
> >>> from decimal import Decimal
> >>> a = Decimal('0.5')
> >>> a > 99999
> False
> >>> a > 99999.0
>
> True
>
> It seems to me that rather than allowing this to happen, comparasion
> between the two should either be made correct (by convertion decimal
> to float e.g.) or forbidden, like arithmatic operations between the
> two types.
>
> --
> Hong Yuan
>
> ?????????
> ???????????http://www.homemaster.cn



From cwitts at gmail.com  Mon May 12 06:31:21 2008
From: cwitts at gmail.com (Chris)
Date: Mon, 12 May 2008 03:31:21 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <ada5acac-ef6f-435b-be6c-ac000b9da14b@b64g2000hsa.googlegroups.com>

On May 11, 3:12?am, globalrev <skanem... at yahoo.se> wrote:
> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
> ? ? if i%3 == 0 and i%5 != 0:
> ? ? ? ? print "Fizz"
> ? ? elif i%5 == 0 and i%3 != 0:
> ? ? ? ? print "Buzz"
> ? ? elif i%5 == 0 and i%3 == 0:
> ? ? ? ? print "FizzBuzz"
> ? ? else:
> ? ? ? ? print i
>
> is there a better way than my solution? is mine ok?

personally if you're just checking if a modulus result is 0 or not I
would rather do as it looks neat imho.

for i in xrange(1,101):
    if not i % 3 and i % 5:
        print 'Fizz'
    elif i % 3 and not i % 5:
        print 'Buzz'
    elif not i % 3 and not i % 5:
        print 'FizzBuzz'
    else:
        print i


From timr at probo.com  Tue May  6 02:13:36 2008
From: timr at probo.com (Tim Roberts)
Date: Tue, 06 May 2008 06:13:36 GMT
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
	<6885g8F2s6gaeU1@mid.uni-berlin.de>
Message-ID: <1ktv14drbmuknvjrbf9kmnd8jb9mqv69so@4ax.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:
>
>You seem to misunderstand HID. HID is a protocol over USB (and Bluetooth I
>believe) that will create user input device events which are mapped to your
>OS input layer. That means that whenever you e.g. attach a keyboard device,
>it's keyboard events will generate key-strokes on screen.

No, it's more than that.  HID devices that are not of a type directly
claimed by the operating system (keyboards, mice) can be accessed by
user-mode programs very easily on both Linux and Windows, without writing a
custom driver.  For low-bandwidth data sources, USB HID is an excellent way
to provide general-purpose access to a USB device.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From bj_666 at gmx.net  Thu May  8 16:57:11 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 20:57:11 GMT
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
Message-ID: <68h7p7F2su97jU3@mid.uni-berlin.de>

On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:

> The thing is, I'm not using slots by choice.  I'm using the standard
> lib "socket" class, which apparently uses slots.

`socket` objects can't be pickled.  Not just because of the `__slot__`\s
but because a substantial part of their state lives in the operating
system's space.

Ciao,
	Marc 'BlackJack' Rintsch


From ggpolo at gmail.com  Wed May  7 17:04:12 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Wed, 7 May 2008 18:04:12 -0300
Subject: Looking for Fredrik Lundh;
	documentation and code examples for elementtree
In-Reply-To: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
References: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
Message-ID: <ac2200130805071404q32b7e9f4xb7936099d9a0abe2@mail.gmail.com>

2008/5/7 dj <d.a.abernathy at gmail.com>:
> Hello All,
>
> I am trying to get in touch with Mr. Lundh. I am looking for exmaple
> code regarding the use of elementtree. I have read through most of the
> examples on http://effbot.org and I am hoping he can suggest some
> others. Additionally, I am hoping he can give me an example use of the
> comment method. I have tried a couple times, but I can not figure it
> out. Thank you so very much.

You should post some question actually, otherwise we can just point at
google and some other links like: http://effbot.org/zone/element.htm,
http://www.ibm.com/developerworks/xml/library/x-matters28/

And.. I think he has been busy these days because I also tried contacting him ;)

Regards,

>
> DJ
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
-- Guilherme H. Polo Goncalves


From inhahe at gmail.com  Mon May 26 16:46:55 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 16:46:55 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
Message-ID: <EjF_j.50578$7a.48174@bignews1.bellsouth.net>

> is it machine -> low-level -> highlevel
> or is it machine -> highlevel
>
> ?

yeah, machine is the lowest level, c is higher than machine.  there isn't 
much that is lower level than c that isn't machine code.  (assembler is just 
mnemonics for machine code, for the most part).   it's machine -> 
low-level -> high level




From daveparker at flamingthunder.com  Tue May 13 13:14:21 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:14:21 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
Message-ID: <8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>

>  Notice that I said "free software", not "*** FREE *** software !!!!
> 1!" (that is, free as in freedom, not free as in beer). Read again my
> answer, considering this.

I misread your meaning.  In a sense, Flaming Thunder is even more free
than "free software".  Flaming Thunder doesn't place any restrictions
on how you use your source code or the executables you create.  There
is no GNU license that you need to worry about.

On May 13, 11:06?am, hdante <hda... at gmail.com> wrote:
> On May 13, 12:24?pm, Dave Parker <davepar... at flamingthunder.com>
> wrote:
>
>
>
>
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.
>
> > Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > (and even less per individual for site licenses), which is less than
> > the cost of just one book on Python.
>
> > I think that many people will find that Flaming Thunder is easier to
> > use and understand than Python -- so for many people the amount of
> > time they save will be worth more than the cost of Flaming Thunder
> > (unless, of course, their time is worth $0).
>
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> > But the future is one of the hardest things to predict, so we'll see.
>
> > On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > > Don't let yourself be irritated by castironpi
>
> > > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > > interaction.
>
> > > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > here. ?If you go back to his postings from a year ago (and selected
> > > > ones since), his comments are coherent and sensible. ?These rambling
> > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > his idea of a joke. ?But they are certainly not worth your time in
> > > > trying to respond to them.
>
> > > > -- Paul
>
> > > ?I don't think castironpi so annoying that I should filter its
> > > messages. It would be enough if he were better tuned. He is much
> > > smarter than the emacs shrink, for example. :-P
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.- Hide quoted text -
>
> > > - Show quoted text -
>
> ?Notice that I said "free software", not "*** FREE *** software !!!!
> 1!" (that is, free as in freedom, not free as in beer). Read again my
> answer, considering this.- Hide quoted text -
>
> - Show quoted text -



From workitharder at gmail.com  Wed May 21 16:27:18 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 13:27:18 -0700 (PDT)
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
	<roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <7b049fb8-c196-4ff6-873b-3893ab670b95@m3g2000hsc.googlegroups.com>

On May 21, 12:13 pm, Roy Smith <r... at panix.com> wrote:
> In article
> <90ecca29-c4d8-4e89-908a-93850d7de... at i76g2000hsf.googlegroups.com>,
>
>  bukzor <workithar... at gmail.com> wrote:
> > Does anyone have a pythonic way to check if a process is dead, given
> > the pid?
>
> > This is the function I'm using is quite OS dependent. A good candidate
> > might be "try: kill(pid)", since it throws an exception if the pid is
> > dead, but that sends a signal which might interfere with the process.
>
> > Thanks.
> > --Buck
>
> The canonical way is to do kill(pid, 0).  If it doesn't throw, the process
> exists.  No actual signal is sent to the process either way.
>
> Of course, the process could exit immediately after the kill() call, so by
> the time you find out it's alive, it's dead.  Such is life.

Thanks! That's exactly what I was looking for. A little more
background:

"If sig is 0 (the null signal), error checking is performed but no
signal is actually sent. The null signal can be used to check the
validity of pid."

Taken from : http://www.opengroup.org/onlinepubs/009695399/functions/kill.html


From pecora at anvil.nrl.navy.mil  Sat May 10 11:06:56 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 10 May 2008 11:06:56 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
Message-ID: <pecora-234295.11065610052008@ra.nrl.navy.mil>

In article <mailman.882.1210361735.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Lou Pecora" <pecora at anvil.nrl.navy.mil> wrote in message 
> news:pecora-DFE713.11234209052008 at ra.nrl.navy.mil...
> | In article <mailman.825.1210293599.12834.python-list at python.org>,
> | "Terry Reedy" <tjreedy at udel.edu> wrote:
> |
> | > "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message
> | > news:200805081914.06459.kyrie at uh.cu...
> | > | Btw, there seems to be a math problem in python with 
> exponentiation...
> | > | >>> 0**0
> | > | 1
> | > | That 0^0 should be a nan or exception, I guess, but not 1.
> | >
> | > a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
> | > But there are unenlighted people who agree with you ;-)
> | > Wikipedia has a discussion of this.
> | >
> | > tjr
> |
> | I like that argument better.  But...
> |
> | I've also heard the very similar a**b is a multiplied by a b-1 times.
> 
> Me too, in school, but *that* definition is incomplete: it excludes b=0 and 
> hence a**0 for all a.  It was the best people could do before 0 was known.
> But 0 was introduced to Europe just over 800 years ago ;-)

[cut some interesting examples]

Yes, I was also thinking about the b=0 case and then the case when b<0.  
If you solve the b<0 case, you solve the b=0 case for a !=0.  Define

a**b= a multiplied by 1/a |b-1| times when b<0.  Then for b=0 we get 
a*(1/a)=1.

Of course, I can avoid all this mathematical dancing around by using 
some of the other simpler definitions like the original one.  :-)

-- 
-- Lou Pecora


From wizzardx at gmail.com  Sat May 24 05:54:11 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 11:54:11 +0200
Subject: Unhandled exceptions checking
In-Reply-To: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <18c1e6480805240254s274cb71am25fb2cf1cfb32b72@mail.gmail.com>

On Sat, May 24, 2008 at 3:31 AM, Yosifov Pavel <aquagnu at gmail.com> wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?
>

Python is too dynamic to do this reliably. eg:

e = exception_returning_func()
raise e

You'll probably be better served by capturing and logging all
unhandled exceptions in your app ("logger.exception(e)" works nicely
in a high level "catch Exception e" block), and then notifying users.

Another thing to try is coverage testing. Won't raise all possible
exceptions in a given  piece of code, but at least you can check if
all lines get run once.

David.


From hniksic at xemacs.org  Fri May 16 05:16:34 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 16 May 2008 11:16:34 +0200
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <8763tea9sd.fsf@mulj.homelinux.net>

"??" <littlesweetmelon at gmail.com> writes:

> Howdy,
>     I wonder why below does not work.
>
> a = object()
> a.b = 1        # dynamic bind attribute failed...

Because the default object class doesn't have a dict or other
indication of state.  It's a "pure" Python object whose only visible
properties are its type and its identity.  (On the implementation
level it also has a refcount.)

This is necessary because all other Python objects (both new-style
classes and C extensions) inherit from 'object', on the C level.
Having state in 'object' would mean having that same in *all* other
Python objects.  The current design, on the other hand, allows
creation of very lightweight python objects that don't even have a
dict.

Subclassing object instructs Python as to what kind of state you want
your class to have.  The default is to have a dict to store
properties:

# a class with dict -- any property goes through dict, and creating a
# Foo object actually creates two objects, one Foo and one dict
class Foo(object):
    pass

But you can also specify:

# an efficient 'Pair' class holding two objects
class Pair(object):
    __slots__ = 'first', 'second'

Instances of Pair take up even less room that 2-element tuples
because they don't carry the size information in the object.

Now, if the object class carried a dict with it, it would be
impossible to create a class like 'Pair'.

> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK
>
> Does this strange behavior break the LSP (Liskov substitution
> principle)?

It follows from LSP that what the subclass may not introduce new
preconditions.  In this case the subclass accepts a case that the
original class didn't, so it doesn't introduce a new precondition, it
simply weakens (removes) an existing one.


From saluk64007 at gmail.com  Sat May 10 19:12:20 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 10 May 2008 16:12:20 -0700
Subject: Now what!?
In-Reply-To: <5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>
Message-ID: <c3f69bf60805101612o5bfebc8ds54c249f93f82857c@mail.gmail.com>

On Sat, May 10, 2008 at 3:57 PM, Grant Edwards <grante at visi.com> wrote:

> On a Linux system (and I presume on other Unixes), the kernel
> itself (if built with the proper options) knows know how start
> a "script" file that starts with the characters "#!".  When the
> kernel is told to execute a file whose first two bytes are "#!"
> (0x32,0x21), it knows to read the newline terminated path of an
> executable starting at the byte following the "!" (the third
> byte in the file).  The kernel then executes that file,
> appending the name of the original "script" file to the argv
> list.


Wow, thanks for the history lesson.  I was under the impression that this
was a bash thing, I had no idea it went as deep as the kernel!
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From duncan.booth at invalid.invalid  Mon May 12 03:31:09 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 07:31:09 GMT
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
	<Xns9A9B83DE83757duncanbooth@127.0.0.1>
	<SeWdnTid7Z7GwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com>
Message-ID: <Xns9A9C5539CF188duncanbooth@127.0.0.1>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>      The sloppy use of "single quote" for the "apostrophe" is unfortunate
><G>

True, but that problem is outside of the Python community's control. Given 
that people do often refer to single quote when they mean apostrophe the 
error message should be written so as to minimise confusion. 



From tim.arnold at sas.com  Mon May 12 17:45:00 2008
From: tim.arnold at sas.com (Tim Arnold)
Date: Mon, 12 May 2008 17:45:00 -0400
Subject: using PIL for good screenshots
Message-ID: <g0adou$1us$1@foggy.unx.sas.com>

Hi,
I'm using PIL to enhance screenshots for print and online publication. I'm 
writing to see if someone else is doing similar work. The shots are dialogs, 
menus, etc. -- my workflow to create the print images:

(1) writer takes screenshot on Windows XP box (96dpi)
----------------------
*** Python Image Library ***
(2) convert to RGB
(3) resize to a writer-specified width using nearest neighbor*
(4) enhance with Sharpness enhancer, factor=2

I think these look pretty good, but if you have a different method or good 
advice, I'd like to hear from you.
*nearest neighbor used for going up in size, antialias for going down in 
size.

thanks,
--Tim Arnold




From ivlenin at gmail.com  Thu May 22 23:00:28 2008
From: ivlenin at gmail.com (I V)
Date: Fri, 23 May 2008 03:00:28 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
	<mailman.1493.1211510178.12834.python-list@python.org>
Message-ID: <grqZj.109$iM3.7@flpi150.ffdc.sbc.com>

On Thu, 22 May 2008 19:35:50 -0700, Charles Hixson wrote:
> Although when comparing Candygram with Erlang it's worth noting that
> Candygram is bound to one processor, where Erlang can operate on
> multiple processors. (I'd been planning on using Candygram for a project
> at one point, but this made it unusable.)

Really? The FAQ says it uses operating system threads, which I would have 
thought would mean it runs on multiple processors (modulo, I suppose, the 
issues with the GIL).



From roopesh.raj at gmail.com  Fri May  9 01:55:46 2008
From: roopesh.raj at gmail.com (Roopesh)
Date: Thu, 8 May 2008 22:55:46 -0700 (PDT)
Subject: Bug in email.utils, parseaddr
Message-ID: <fb5d57bf-1840-43c7-8b31-2abd2dd88e9b@f63g2000hsf.googlegroups.com>

Hi,

I tried using parseaddr of email.utils, but it gave the following
result when the name had a comma inside.

>>> e = 'K,Vishal <vishal at someaddress.biz>'
>>> from email.utils import parseaddr
>>> parseaddr(e)
('', 'K')

Thanks and Regards,
Roopesh


From gagsl-py2 at yahoo.com.ar  Mon May  5 03:18:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 04:18:41 -0300
Subject: bisect intersection
References: <48160045.1030806@jouy.inra.fr>
Message-ID: <op.uan6lfiqx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 28 Apr 2008 13:50:13 -0300, Robert Bossy <Robert.Bossy at jouy.inra.fr> escribi?:

> I stumbled into a sorted list intersection algorithm by Baeza-Yates
> which I found quite elegant. For the lucky enough to have a springerlink
> access, here's the citation:
> http://dblp.uni-trier.de/rec/bibtex/conf/cpm/Baeza-Yates04
>
> I implemented this algorithm in python and I thought I could share it.
> I've done some tests and, of course, it can't compete against dict/set
> intersection, but it will perform pretty well. Computing union and
> differences are left as an exercise...

Nice. As it only uses comparisons, it can be used even if the elements aren't hashable, that's good.
But if they are hashable, using a set and sorting again at the end is much faster, as you discovered.

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Thu May  8 07:17:01 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 8 May 2008 04:17:01 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>

On May 8, 5:25 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>

Are you a newbie to Python, or to programming in general? I'll assume
you are a newbie to programming in general because of that last
question you asked. Things in Python are easier than in almost any
other programming language. Here are three Hello World programs:

--------------C++---------------------
#include <iostream.h>

main()
{
    cout << "Hello World!";
    return 0;
}
--------------------------------------

-------------Java---------------------
class HW {
    public static void main(String args[]) {
        System.out.println("Hello World!");
    }
}
--------------------------------------

------------Python--------------------
print "Hello World!"
--------------------------------------

--------------C#----------------------
<I have no idea!>
--------------------------------------

I think you can clearly see which one is easiest. Of course, that
doesn't mean that the "easiest" language is always the "best"
language, although it is a strong point. But ease of use is just a one-
in-a-million characteristic of Python. If you're a total beginner, I'd
recommend you learning the one that attracts you the most.


From usenet1 at anton.e4ward.com  Mon May  5 05:21:21 2008
From: usenet1 at anton.e4ward.com (Anton81)
Date: Mon, 05 May 2008 11:21:21 +0200
Subject: Weird import problem
References: <fvkoer$2g7h$1@gwdu112.gwdg.de> <68674mF2rjrt5U1@mid.uni-berlin.de>
Message-ID: <fvmjii$2ogp$1@gwdu112.gwdg.de>

>> NS/dir1/file1.py
>> NS/dir2/file2.py
> This *must* be wrong or at least not the full directory listing - please
> read
It is the directory structure in one of the python paths.

> Missing __init__.py in the dir2?
Oh right. I forgot about this. Thank you!


From duncan.booth at invalid.invalid  Thu May  1 03:59:35 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 07:59:35 GMT
Subject: calling variable function name ?
References: <cf179899-177f-4516-95dd-f368eaf7c6a7@f63g2000hsf.googlegroups.com>
	<ad02220c-294c-4c6a-bc61-3165bf5ab08e@f63g2000hsf.googlegroups.com>
	<57461074-8fd1-4e65-9bc9-2ac916aa1fb5@y21g2000hsf.googlegroups.com>
	<m28wyvba54.fsf@googlemail.com> <sj3Sj.3445$XI1.681@edtnps91>
Message-ID: <Xns9A915B7293F8Dduncanbooth@127.0.0.1>

"thinkofwhy" <thinkofwhy at yahoo.ca> wrote:

> Try a dictionary:
> 
>     def funcA(blah, blah)
>     def funcB(blah, blah)
>     def funcC(blah, blah)
>     functions = {'A': funcA, 'B': funcB, 'C': 
> funcC}
>     user_func = 'A'
>     functions[user_func] #execute function

Python has a neat concept for making this easy :^) it is called a class.

class MyFunctions(object):
    def funcA(self, param1, param2):
    	  print "FA " + param1 + " " + param2

    def funcB(self, param1, param2):
    	  print "FB " + param1 + " " + param2

    def funcC(self, param1, param2):
    	  print "FC " + param1 + " " + param2

    def defaultFunc(self, *args):
        print "Command not recognised"

    def doCommand(self, cmd, *args):
        return getattr(self, 'func'+cmd, self.defaultFunc)(*args)

functions = MyFunctions()
result = functions.doCommand('A', 'foo', 'bar')

You have to add an extra 'self' argument to each function (or make it a 
staticmethod), but you could always use it to store state without resorting 
to globals.


From tkpmep at hotmail.com  Thu May 29 16:57:57 2008
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Thu, 29 May 2008 13:57:57 -0700 (PDT)
Subject: Getting up and running with Python on a Mac
Message-ID: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>

I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
10.5.3), and am looking to install Python on it, and to use it with
XCode, Apple's IDE. Some googling suggests that a number of people
have had trouble getting Python to run satisfactorily on their Macs.
This is my first Mac, and I'd appreciate some guidance on what to do
(and what not to) when installing Python and potential problems to
keep an eye open for. I want to do a fair bit of scientific /
numerical computing, so it would seem that SAGE ot the Enthought
Python distribution would seem to be the most relevant  - I'd
appreciate your guidance on getting Python to run on a Mac with a
particular focus on these two distributions.

Thank you in advance

Thomas Philips


From goldnery at gmail.com  Sat May 31 19:25:10 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 31 May 2008 16:25:10 -0700 (PDT)
Subject: Need Tutorial For the following lib
References: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com> 
	<Ca6dnV-iv7-2TNzVnZ2dnUVZ_vjinZ2d@pdx.net>
Message-ID: <0bdd04b8-23b6-4a68-bda2-6984428ce7bd@b1g2000hsg.googlegroups.com>

Hi scott, you couldn't be more wrong about my laziness. I straggle
with my poor English for hours to fined what I'm looking for.
I found a very simple and not comprehensive tutorial for the pyWinAuto
lib in this address http://pywinauto.openqa.org/
but it only show how to do the basic, and my knowledge at this point
is not enough to figure the rest I need to know by myself
I found another simple  lib for the watsup that based on winGuiAuto
lib in this address
http://www.tizmoi.net/watsup/intro.html
But for some risen I couldn't manage to ran it in my computer

I'm trying to generate auto mouse double click or auto selecting text
(the selecting text part is the one I interest in. mouse double click
just do the same effect if the mouse cursor is on text)

I'm sorry you feel I'm lazy. The truth is that event writing this
message takes me an enormous power.
weather you choose to help me or not I still going to keep trying ,
But you have the opportunity to save me lots of trouble, So maybe one
day I could help others.

so if you familiar with any good tutorial for this library please let
me know and if not then thank you anyway for wonting to help

Y.G





From mccredie at gmail.com  Mon May  5 18:57:52 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 5 May 2008 15:57:52 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
Message-ID: <a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>

On May 5, 10:22 am, Francesco Bochicchio <bock... at virgilio.it> wrote:
> On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:
> > Hi,
> >  In my application, I have some configurable information which is used
> > by different processes. currently I have stored configration in a
> > conf.py file as name=value pairs, and I am importing conf.py file to
> > use this variable. it works well
>
> > import conf
> > print conf.SomeVariable
>
> > but if I need to change some configuration parameteres,  it would need
> > me to restart processes.
>
> > I want to store this data in some conf file (txt) and would like to
> > use it same way as I am using these variables as defined in py
> > files.
>
> > one solution I can think of is writing data as a dictionary into conf
> > file. and then by reading data, apply eval on that data. and update
> > local dict? but this is not a good solution....
>
> > any pointers?
>
> > Sandip
>
>  The 'simple but relatively dangerous way', already suggested, is to
>  reload() the module.
>
> A safer way - but requiring more work - could be to build something around
> the Configparser module in the standard library ...
>
> Ciao
> -----
> FB

How is it relatively dangerous? I mean, aside from any `dangers'
associated with importing a user defined module in the first place.

Matt


From afilash+python at gmail.com  Tue May 20 13:52:01 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Tue, 20 May 2008 23:22:01 +0530
Subject: AttributeError: module object has no attribute
In-Reply-To: <g0v1r3$ikn$1@registered.motzarella.org>
References: <g0v1r3$ikn$1@registered.motzarella.org>
Message-ID: <9f9d35df0805201052r7fd6b54dof70822a0a820e23d@mail.gmail.com>

hai nikhil,
please check your __init__ file if you had any

cheers,
abhilash

On Tue, May 20, 2008 at 11:00 PM, Nikhil <mnikhil at gmail.com> wrote:

> I have recently written a small module. When I import the module, I always
> get the error
>
>
> only when I do
>
> >>> from local.my.module import *
>
> --
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> ---
>
>
> but when I do the below, I do not get any error.
>
> --
> >> import local.my.module
> >>
> --
>
> Any ideas on what could be wrong?
>
>
> Thanks in advance.
>
> Nikhil
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From deets at nospam.web.de  Fri May 23 07:59:43 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 13:59:43 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <4836a876$0$11623$607ed4bc@cv.net>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
	<69nls3F344g2cU1@mid.uni-berlin.de>
	<4836a876$0$11623$607ed4bc@cv.net>
Message-ID: <69nptfF318ps2U1@mid.uni-berlin.de>

> 
> OP: "I am wondering if python can do some kernel coding that
> used to be the private garden of C/C++."

"kernel coding" is pretty clear I'd say - coding a or in the kernel. Not 
coding that runs on an OS that happens to have a kernel.

> The answer is yes.  IPC and py-pf are examples.  If you don't think of 
> packet filtering as kernel coding, I can understand.  But clearly the 
> Python interfaces to fork(), waitpid(), signal(), alarm() and so forth 
> are forays into the once private garden of C.

Also not "kernel coding" in my book. system-near coding - yes. But not 
coding a kernel...

Diez


From omirek10 at poczta.onet.pl  Mon May 12 09:54:41 2008
From: omirek10 at poczta.onet.pl (Odys)
Date: Mon, 12 May 2008 06:54:41 -0700 (PDT)
Subject: execfile python3k
Message-ID: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>

Hi there,

Since execfile() is removed in Python 3.0
I have question about using exec.

I know about
  exec(open('filename').read())
but from documentation the 1st arg of exec can be 'file object'.
However
   exec(open('filename'))
does not work.
Does anybody have idea how to construct 'file object' then?

Thanks,


From see.signature at no.spam  Fri May  2 04:53:08 2008
From: see.signature at no.spam (Eric Brunel)
Date: Fri, 02 May 2008 10:53:08 +0200
Subject: Simple TK Question - refreshing the canvas when not in focus
References: <16d36d38-43fe-4863-8df7-02c60c18600c@j22g2000hsf.googlegroups.com>
	<4818349e$0$2959$ba620e4c@news.skynet.be>
	<op.uaffxfkswepdt4@ericb.pragmadev>
	<182ace66-bdf6-409c-85ee-fd764de8e1c6@z72g2000hsb.googlegroups.com>
	<fva0ds$8iv$01$1@news.t-online.com>
	<8fbf2b85-1b6a-4f6c-a84e-934609fd0e4e@c58g2000hsc.googlegroups.com>
Message-ID: <op.uaiqyufywepdt4@ericb.pragmadev>

On Wed, 30 Apr 2008 20:19:32 +0200, blaine <frikker at gmail.com> wrote:

> On Apr 30, 10:41 am, Peter Otten <__pete... at web.de> wrote:
>> blaine wrote:
>> > Still doesn't work.  I'm looking into using wx instead...
>>
>> > This is the full code - does it work for anyone else? Just do a echo
>> > 'line 0 0 10 10' > dev.file
>>
>> Haven't tried it, but I think that the problem is that you are updating  
>> the
>> UI from the "readthread". A good example to model your app after is  
>> here:
>>
>> http://effbot.org/zone/tkinter-threads.htm
>>
>> Peter
>
> Update: Not only is that a good model, its exactly what I'm trying to
> do.  Thanks again!

BTW, instead of reading the queue periodically, you can also use the event  
loop for that: in the secondary thread, generate a custom event using the  
event_generate method. Custom events are enclosed in '<<...>>', the '...'  
can be whatever you like. Be sure to generate the event with the  
when='tail' option or the event might get handled immediatly. To treat the  
event, do a binding on it: it will be called in your main thread. It's a  
common trick to switch threads so that GUI events are treated in the main  
thread and not in secondary ones.

Example:

------------------------------------------
import threading
import time
import Queue
 from Tkinter import *

root = Tk()

q = Queue.Queue()

def thread_action():
   i = 1
   while 1:
     time.sleep(1)
     q.put(i)
     root.event_generate('<<Ping>>', when='tail')
     i += 1

v = StringVar()

def ping_received(event):
   v.set(q.get())

Label(root, textvariable=v, width=10).pack()
root.bind('<<Ping>>', ping_received)

th = threading.Thread(target=thread_action)
th.setDaemon(1)
th.start()

root.mainloop()
------------------------------------------

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From scuteezgb at gmail.com  Fri May  9 10:06:49 2008
From: scuteezgb at gmail.com (gbin,Zhou)
Date: Fri, 9 May 2008 07:06:49 -0700 (PDT)
Subject: Can I "delete" the namespace of a module that i import?
Message-ID: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>

Hi,all.
   I see from "http://docs.python.org/tut/node11.html" that "Name
spaces are created at different moments and have different lifetimes.
The namespace containing the built-in names is created when the Python
interpreter starts up, and is never deleted. The global namespace for
a module is created when the module definition is read in; normally,
module namespaces also last until the interpreter quits."
   So can I "delete" the namespace of a module that i import?
   thanks.


From notbob at nothome.com  Wed May 21 17:57:00 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:57:00 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
Message-ID: <MU0Zj.975$5H6.622@fe107.usenetserver.com>

On 2008-05-21, Damon Getsman <dgetsman at amirehab.net> wrote:

> My suggestion, if you want to keep that gray meat sparking, is to go
> with only html & php.  You could have the php dumping your entries
> into date/time named textfiles on there when you're writing, and when
> someone is reading, it just orders them sequentially by the date &
> time in their filenames.
>
> Then again, you learn the HTML+PHP+MySQL thing and you've got a skill
> that you can market on Craigslist to a bunch of people for $20/hr
> +.  :)

That certainly couldn't hurt.  Thank you for your advice.

nb


From jon at ffconsultancy.com  Thu May 15 13:00:35 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 15 May 2008 18:00:35 +0100
Subject: generate all possible math expr of one term
References: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
Message-ID: <yOqdnWePY_XV8LHVRVnygQA@posted.plusnet>

xahlee at gmail.com wrote:
> Here's a example of Expressiveness of a Language.
> 
> The following is Mathematica code that generates all possible
> equations of one term involving trig function. (tweak the funList and
> nesting level to define what ?all possible? means. if nesting level is
> 2, it takes about 20 minutes and returns a list of 2876 terms on a
> 2004 personal computer.
> 
> << DiscreteMath`Combinatorica`
> funList = {Sin, Tan, Power[#, -1] &};
> Nest[Module[{li = #},
>  (Union[#, SameTest -> (Module[{arg1 = #1, arg2 = #2},
>    If[(*both expression contains both x and y*)
>      And @@ (((((StringMatchQ[#, "*x*"] &&
>      StringMatchQ[#, "*y*"]) &)@
>      ToString@#) &) /@ {arg1, arg2})
>      , SameQ[arg1, arg2 /. {x -> y, y -> x}],
>      SameQ[arg1, arg2]]
>    ] &)] &)@
>    Union at Flatten@(Table[(Times @@ # &) /@ KSubsets[#, i], {i, 1,
>    2}] &)@Flatten@{li, Outer[#1@#2 &, funList, li]}
>  ] &, {x, y}, 1];
> Select[%, (StringMatchQ[ToString@#, "*x*"] &&
>  StringMatchQ[ToString@#, "*y*"]) &]

This does not even start running in Mathematica 6, let alone produce any
correct results. The first line was deprecated some time ago. I don't know
what is wrong with the rest of your program but it takes a while to produce
the empty list.

> The problem is this: generate a list of all possible math expressions
> using the following combination and rules:
> 
> ? the math expression involves both x and y. (must have both present)
> ? you can use any of the 6 trig functions (you must, since the goal is
> to create all possibilities)
> ? The binary operations you can use are multiply, divide. (no addition
> or substraction, since that can make the result 2 terms)
> ? a sub-expression (such as x or y) can be replaced by a more
> complicated one. (i.e. you can nest)

Then your program should produce an infinite number of terms, e.g. x,
Sin[x], Sin[Sin[x]], ...

> The above i wrote in 2002. If there are requests, i'll translate the
> above code into emacs lisp.

A correct definition of what the program is supposed to do with a correct
implementation in any language would be a good start.

If you are trying to do what I think you are trying to do then this is a
trivial recursive definition in just about any language and it does not
take advantage of anything specific to Mathematica anyway.

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From msc at es.aau.dk  Mon May 19 04:17:03 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Mon, 19 May 2008 10:17:03 +0200
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<3xUXj.11305$hv2.9481@bignews5.bellsouth.net>
Message-ID: <wdwiqxapv28.fsf@msc-dt.kom.auc.dk>

>>>>> "inhahe" == inhahe  <inhahe at gmail.com> writes:
inhahe> Btw, use float() to convert a textual GPA to a number.

It would be much better to use Decimal() instead of float(). A GPA of
3.6000000000000001 probably doesn't make much sense; this problem
doesn't arise when using the Decimal type.

Martin


From gherron at islandtraining.com  Thu May 15 16:46:06 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 13:46:06 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
Message-ID: <482CA10E.1040602@islandtraining.com>

Marlin Rowley wrote:
> Gary,
>
> I'm getting streaming tile data from a renderer in order to allow the 
> user to see the rendering of tiles in real-time to create the total 
> image.  I'm NOT reading an entire image scanline-by-scanline.  The 
> renderer streams in a series of floats (for each tile) and I build 
> this tile up from each individual color component passed in.  I then 
> convert it to a small bitmap and blit() it to the window that will 
> eventually make up my entire image.  I'm just wanting to make the 
> process as fast as the renderer can render the tiles.  I've noticed on 
> scenes that aren't very complex for the renderer that my python script 
> is spending most of it's time drawing while the renderer is already 
> done.  What you've given me has sped up the drawing a lot, but I'm 
> hungry for more optimization!
>
> There is no file format to be read.  The data is raw bytes and can be 
> any format.

You are misinterpreting what I mean by a format.  All data is a string 
of bytes, and interpreting that string of bytes to have some particular 
form is applying a format to it.    Your particular format is: each 4 
bytes represents a float, and a string of such floats give the RGBA 
values for a rectangle (of some size) of pixels.  I doubt that you are 
the first ever to use that particular format to encode an image, but I 
also don't believe it matches any of the standard image formats.

So... There is still hope to use already written tools to decode your 
format. 

Here's a hint on how to use numpy for decoding a byte string into an 
array of floats.  My example byte string is a hand coded string of just 
12 bytes -- you should replace that with a whole row or better yet, a 
whole tile's worth of bytes.

 >>> import numpy
 >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'
 >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)
 >>> b
array([ 1.,  2.,  3.], dtype=float32)


If you want to use the array module instead:

 >>> import array
 >>> a = array.array('f')
 >>> a.fromstring(byteString)
 >>> a
array('f', [1.0, 2.0, 3.0])


In either case ANY number of bytes can be decoded into an array of 
floats, in one highly efficient call from Python.

What you do with that array of float afterwards is up to you....

If I read your note correctly, here's what I'd do to turn the array of 
bytes into an image of a tile to be displayed on the screen.

  Get the whole tile's worth of bytes with one read into a single string.
  Decode that string into an array of floats (as above).
  Reshape the array into a 3D array (i.e., a rectangular array of RGBA 
values)
  Convert that array of floats into an array of 8-bit integers (scaling 
all by 255).
  Extract (via tostring) that array into a string of bytes.
  Send that string of bytes to the graphics system as an RGBA array of 
pixels.

Each of these calls is one Python call into a highly efficient library.  
This is using Python as a, so called, glue language. 

Gary Herron







>
> > Date: Thu, 15 May 2008 10:09:45 -0700
> > From: gherron at islandtraining.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > John Machin wrote:
> > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> > >
> > >> Marlin Rowley wrote:
> > >>
> > >>> All:
> > >>>
> > >>> I've got a script that runs really slow because I'm reading from a
> > >>> stream a byte at a time:
> > >>>
> > >>> // TERRIBLE
> > >>> for y in range( height ):
> > >>> for color in range(4):
> > >>> for x in range( width ):
> > >>> pixelComponent = fileIO.read(4)
> > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE
> > >>>
> > >
> > > [snip]
> > > Perhaps the OP might be able to use the Python Imaging Library (PIL)
> > > instead of reinventing an image-file handler.
> > >
> >
> > Indeed. That's why my original answer included the line:
> > There are probably better ways overall, but this directly answers
> > your question.
> >
> > Other possibilities.
> >
> > I don't recognize the file format being read in here, but if it is a
> > standard image format, the PIL suggestion is a good way to go.
> >
> > Or, if it is an image of not too enormous size, read the *whole* thing
> > in at once.
> >
> > Or rather than manipulate the array by carving off 4 bytes at a time,
> > just index through it in 4 byte chunks:
> > for i in range(width):
> > buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> >
> > Or
> > for i in range(0,4*width,4):
> > buffer = unpack("!f", pixelComponent[i:i+4])
> >
> > Or
> > Use numpy. Create an array of floats, and initialize it with the byte
> > string, making sure to take endianess int account. (I'm quite sure this
> > could be made to work, and then the whole operation is enormously fast
> > with only several lines of Python code and *no* Python loops.
> >
> > Or
> > ...?
> >
> > Gary Herron
> >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> ------------------------------------------------------------------------
> Windows Live SkyDrive lets you share files with faraway friends. Start 
> sharing. 
> <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From gherron at islandtraining.com  Thu May 15 15:24:15 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 12:24:15 -0700
Subject: Pass data from Python to C++
In-Reply-To: <g0hrq3$rfb$1@solaris.cc.vt.edu>
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <482C8DDF.7070306@islandtraining.com>

brad wrote:
> I have some c++ binaries that do rather intense number computations. 
> They do it well and rather quickly compared to other languages (not 
> just Python). An example:
>
>> brad at qu:~/$ date && ./compute.cpp.o < 1_million.txt > /dev/null && date
>> Thu May 15 13:08:28 EDT 2008
>> Thu May 15 13:08:31 EDT 2008
>> brad at qu:~/$ date && python compute.py < 1_million.txt > /dev/null && 
>> date
>> Thu May 15 13:08:38 EDT 2008
>> Thu May 15 13:14:50 EDT 2008
>
> In this case, c++ does one million things in 3 seconds that Python 
> takes more than 6 minutes to do. The one million is a minimum. At 
> times the computations are in the billions. This is why c++ was chosen.
>
> However, other components can be written in a more user friendly, more 
> easily maintained language. We've chosen Python for this. The main 
> question now is how to pass the computationally heavy info to c++ from 
> within Pyhton. os.system is not ideal. Just wondering how other folks 
> do this? I have source to some of the c++ code, but some of it is in 
> binary from only. It can take stdin or arguments.
>
> Thanks for any tips,
>
> Brad
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list


There are lots of ways to do this.    Lots of the modules you use are 
written in C and callable from Python. (Including sys, os, socket, PIL, 
numpy, all graphics and GUI modules, ...)  And that's exactly what you 
want here -- a module that you can import into Python which gives you 
the ability to make calls into your C++ code.   This is often called 
*wrapping* your C++ library.

This is no small task, and it depends heavily on the size/complexity of 
the API you wish to wrap, and whether it's C (easier) or C++(harder).   
However, there are *lots* of tools to help.  I'd start by looking here:
  http://wiki.python.org/moin/AdvocacyWritingTasks/GlueLanguage

Good luck,

Gary Herron




From bronger at physik.rwth-aachen.de  Thu May  1 17:03:38 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 23:03:38 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru>
Message-ID: <878wytvis5.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> [...]
>
> I took the example from
> http://www.kuro5hin.org/story/2004/10/29/14225/062 I haven't use
> my own example only because I don't have one at hand right
> now. YAML, in its simple form, definetely makes me more
> productive. I wasted too much time with XML in the past and I
> won't ever use it as a serialization or config/settings format
> again. .INI/ConfigParser is too limited and has no standards. I
> just don't see anything better than YAML to do human and Python
> editable config files and to serialize information for later use.

Okay, but serialisation is something completely different.  Nobody
would use INI files for it.

For other things, it simply depends on the use case.  For example, I
*know* that the configuration files of my pet project will not
exceed the dumb section.key=value scheme so anything else would be
overkill.

Besides, YAML adds another dependency.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From kyosohma at gmail.com  Tue May 13 14:17:04 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 11:17:04 -0700 (PDT)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <835cca6a-dc35-44fa-a72e-7365e7a0bfb2@y21g2000hsf.googlegroups.com>

On May 13, 1:02?pm, hdante <hda... at gmail.com> wrote:
> Hello,
>
> ?How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server). Do you recommend doing so ?
>
> ?What's your prefered news reader ?

You can use Gmane or Nabble or you could subscribe to c.l.py as a
mailing list here:

http://mail.python.org/mailman/listinfo/python-list

Mike


From marlin_rowley at hotmail.com  Thu May 15 12:53:32 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:53:32 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C6A0A.8080308@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<482C60AB.2060406@islandtraining.com>
	<BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
	<482C6A0A.8080308@islandtraining.com>
Message-ID: <BAY135-W307E513765910B818E0CF39FC90@phx.gbl>

Sorry Gary,
 
I found out that I wasn't reassigning the array back once I got the first 4 bytes.  I don't mean to appear lazy..:(
 
Thanks for the help!
 
-M



> Date: Thu, 15 May 2008 09:51:22 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > Thanks for the advice!> > > > However, I assumed that:> > > > fourbytes = pixelComponent[:4]> > > > would shave that byte off the array in pixelComponent. So that the > > array is smaller by one on the next iteration. Is this not the case?> You don't need the newsgroup to answer this kind of question. Just try it!> > >>> a = 'abcdefghi'> >>> b = a[:4]> >>> print a,b> abcdefghi abcd> > Notice that the [:4] index does not change the original array.> > Gary Herron> > > > > > > I'm getting weird results now..> > > > -M> >> >> >> >> > ------------------------------------------------------------------------> >> > > Date: Thu, 15 May 2008 09:11:23 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com> > > CC: python-list at python.org> > > Subject: Re: How do I use the unpack function?> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > I've got a script that runs really slow because I'm reading from a> > > > stream a byte at a time:> > > >> > > > // TERRIBLE> > > > for y in range( height ):> > > > for color in range(4):> > > > for x in range( width ):> > > > pixelComponent = fileIO.read(4)> > > > buffer = unpack("!f",pixelComponent) << unpacks ONE> > > > float, but we now can do something with that pixel component.> > > >> > > >> > > > I can speed this up dramatically if I did this:> > > >> > > > // MUCH FASTER> > > > for y in range( height ):> > > > for color in range(4):> > > > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more> > > > data from the stream into memory FIRST!!> > > > for x in range( width ):> > > > buffer = unpack( ?????? ) <<<< how do I get each float from> > > > the pixelComponent???> > >> > > Just carve of the first four bytes of pixelComponent on each pass> > > through the loop, and unpack that.> > >> > > for x in range(width):> > > fourbytes = pixelComponent[:4] # first 4 bytes> > > pixelComponent = pixelComponent[4:] # All but first four bytes> > > buffer = unpack("!f", fourbytes)> > >> > >> > > There are probably better ways overall, but this directly answers your> > > question.> > >> > > Gary Herron> > >> > >> > > >> > > >> > > > -M> > > > > > ------------------------------------------------------------------------> > > > With Windows Live for mobile, your contacts travel with you. Connect> > > > on the go.> > > > > > <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it > > out! > > <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
With Windows Live for mobile, your contacts travel with you.
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From deets at nospam.web.de  Thu May 29 05:26:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 11:26:25 +0200
Subject: cmd.Cmd bug or at least docu-bug
Message-ID: <6a7b72F3467inU1@mid.uni-berlin.de>

Hi,

I'm fiddling around with module cmd. I tried to pass my own streams as
replacements for stdin and stdout. However, stdin wasn't working. After a
look into the sourcecode I discovered that there is an class-variable
called 

use_rawinput

that prevents using the passed stdin. I then read the docs again - and found
it described. However, I think it should be mentioned on the first page
where the constructor is described that without setting use_rawinput to
False, stdin will be ignored.

Or even better either make use_rawinput set to false in case stdin is passed
anything but None or at least make it a keyword argument.

Any thoughts about this?

Diez


From robert.kern at gmail.com  Thu May  1 17:45:51 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 01 May 2008 16:45:51 -0500
Subject: Getting started with pyvtk
In-Reply-To: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
Message-ID: <fvddmf$id$1@ger.gmane.org>

Peter Pearson wrote:
> I'm trying to get started with pyvtk, the Python interface
> to the Visualization Toolkit, but there's obviously
> something important that I haven't figured out after an
> embarrassingly long morning of googling around.  When I run
> sample pyvtk code (example1.py, from
> http://cens.ioc.ee/cgi-bin/viewcvs.cgi/python/pyvtk/examples/example1.py),
> nothing graphical happens, but some text files appear named
> example1.vtk and example1b.vtk.  Guessing that I need to
> feed one of these to vtk, I tried "vtk <example1.vtk" and
> "vtk example1.vtk", but those result in (different) error
> messages that I think mean example1.vtk is not the language
> that vtk expects.  Simply running "vtk" (apparently 4.0)
> gets a prompt that has no help command, and "man vtk" just
> tells me it's like "wish", and "man wish" doesn't address
> what to do with a vtk file.
> 
> What key piece am I missing?

pyvtk is not the Python interface to VTK. It is for the creation of VTK files. 
The vtk(1) command is a Tcl shell with the VTK libraries loaded (I believe). 
Read the VTK documentation for information on the Tcl interface if you really 
want to use it. The Python interface is also included in the VTK sources, 
although it might not have been built on your machine. You have to enable it 
when you build VTK itself. The Python interface is essentially the same as the 
C++ interface. There are Python examples in the VTK source tree.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From aisaac at american.edu  Thu May 29 18:05:49 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 22:05:49 GMT
Subject: make a string a list
In-Reply-To: <g1n7an$1dr$1@registered.motzarella.org>
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <1NF%j.9238$u7.4650@trnddc07>

Nikhil wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made 
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position. 

Why dont the ``find`` or ``index`` methods work for you?
http://docs.python.org/lib/string-methods.html

Cheers,
Alan Isaac


From info at wingware.com  Thu May 22 08:56:18 2008
From: info at wingware.com (Wingware)
Date: Thu, 22 May 2008 08:56:18 -0400
Subject: ANN: Wing IDE 3.1.1 released
Message-ID: <48356D72.1060509@wingware.com>

Hi,

Wingware has released version 3.1.1 of Wing IDE.  This bug fix release is
available for all three product levels of Wing IDE.

*Release Highlights*

This release includes the following:

* Template tool properly supports 2nd+ like-named fields
* Several VI mode improvements
* Replace in selection fixes
* Maintain caret position when auto-strip trailing white space
* Avoid trying to use unsupported Python versions
* About 20 other bug fixes: see the change log for details:
   http://wingware.com/pub/wingide/3.1.1/CHANGELOG.txt

*Downloads*

Wing IDE Professional and Wing IDE Personal are commercial software and
require a license to run. A free trial license can be obtained directly from
the product when launched.

Wing IDE Pro 3.1.1         http://wingware.com/downloads/wingide/3.1

Wing IDE Personal 3.1.1    http://wingware.com/downloads/wingide-personal/3.1

Wing IDE 101 3.1.1         http://wingware.com/downloads/wingide-101/3.1

*About Wing IDE*

Wing IDE is an integrated development environment for the Python programming
language.  It provides powerful debugging, editing, code intelligence,
testing, and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Wing IDE is available in three product levels:  Wing IDE Professional is
the full-featured Python IDE, Wing IDE Personal offers a reduced feature
set at a low price, and Wing IDE 101 is a free simplified version designed
for teaching entry level programming courses with Python.

System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or
Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit).
Wing IDE 3.1 supports Python versions 2.0.x through 2.5.x.

*New Features in Wing 3.1*

This release adds the following features not found in Wing 3.0.x:

* Support for zip archives
* Support for pkg_resources name spaces and eggs
* Support for doctest and nose style unit tests (*)
* Scan for sys.path changes such as those used in buildout
* How-To and support for Google App Engine
* Inline context appropriate templates/snippets integrated with autocompleter (*)
* Word list driven auto-completion in non-Python files (**)
* Quick navigation to files and symbols by typing a fragment (**)
* Improved support for Stackless Python
* Preference to strip trailing white space on save
* Display gi_running and gi_frame for generators
* Improved code analysis for Python 2.5
* Other minor features and bug fixes not found in Wing 3.0.x

(*)'d items are available in Wing IDE Professional only.
(**)'d items are available in Wing IDE Personal or Professional only.

Please see the change log for a detailed list of changes:
http://wingware.com/pub/wingide/3.1.1/CHANGELOG.txt

*Purchasing and Upgrading*

Wing 3.1 is a free upgrade for all Wing IDE 3.0 users. Any 2.x license sold
after May 2nd 2006 is free to upgrade; others cost 1/2 the normal price to
upgrade.

Upgrade a 2.x license:    https://wingware.com/store/upgrade

Purchase a 3.x license:   https://wingware.com/store/purchase

-- 

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com




From lists at cheimes.de  Fri May  2 05:59:33 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 11:59:33 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <481AE22E.3040906@shopzeus.com>
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
Message-ID: <481AE605.50102@cheimes.de>

Laszlo Nagy schrieb:
> For sensitive resources, instead of writing __del__ methods, you should
> create a "close()" method. Python does this with file objects, DB API
> 2.0 with database connection objects etc. Then you can do
> 
> res = create_resource()
> try:
>    use_resource()
> finally:
>    res.close() # Must free resource, but the object can still be alive...

You can replace the try/finally code with a "with resource:
do_something()" block if the object supporst the context manager protocol.

If you want to run some code during the shutdown phase of the Python
process you can register a callback function in the "atexit" module.

> It is more common to use signals when you have more threads or child
> processes. You can use something like:

Do NOT mix threads and signals. It's usually a very bad idea and may
lead to surprising side effects. Signals are only handled by the main
thread.

Christian


From castironpi at gmail.com  Sun May 11 01:15:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 22:15:49 -0700 (PDT)
Subject: People still using Tkinter?
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net> 
	<mailman.906.1210435115.12834.python-list@python.org>
	<4825cd01$0$14982$9b622d9e@news.freenet.de> 
	<mailman.913.1210445877.12834.python-list@python.org>
Message-ID: <c5eb0d63-357b-40f2-a2ec-10db6736ab2b@l64g2000hse.googlegroups.com>

On May 10, 1:57?pm, Kenneth McDonald
<kenneth.m.mcdon... at sbcglobal.net> wrote:
> The only trick it that sometimes it isn't obvious how to make the Tcl/
> Tk call via Python.
>
> Ken
>
> On May 10, 2008, at 11:27 AM, Martin v. L?wis wrote:
>
>
>
> >> I am, but "still" isn't the word, I just started. ?Good, *complete*
> >> docs seem to be hard to find, but using a combination of the free
> >> resources and going back and forth between them seems to work all
> >> right so far.
>
> > IMO, the trick really is to also have a Tk documentation around.
> > If you need to find out what option is supported by what widget,
> > there isn't really much point in duplicating that information in
> > Tkinter, IMO - the Tk documentation has it all.
>
> > Regards,
> > Martin
> > --
> >http://mail.python.org/mailman/listinfo/python-list- Hide quoted text -
>
> - Show quoted text -

A limited browser-set

from browserset remove imported.sys.modules[ '__main__' ]

which should be a snytactically consistent expression.

or,

from imported.sys.modules[ '__main__' ] remove browserset

Could make tkinter-complexity applications for browsers.

Argue it's sufficiently general to spend a dollar on.


From rhamph at gmail.com  Tue May  6 11:56:31 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Tue, 6 May 2008 08:56:31 -0700 (PDT)
Subject: Decimal vs Float comparasion
References: <mailman.625.1210045932.12834.python-list@python.org> 
	<H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
Message-ID: <ff51d495-bd21-45cf-be32-f7709619599e@w1g2000prd.googlegroups.com>

On May 6, 1:31 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 6 May 2008 11:52:10 +0800, "Yuan HOng" <hongyuan1... at gmail.com>
> declaimed the following in comp.lang.python:
>
>
>
> > It seems to me that rather than allowing this to happen, comparasion
> > between the two should either be made correct (by convertion decimal
> > to float e.g.) or forbidden, like arithmatic operations between the
> > two types.
>
>         Why should decimal be coerced to float? Maybe float should be
> coerced to decimal?
>
>         Or... the programmer should explicitly specify what comparison is
> wanted -- if any...
>
>         Or... Isn't Python 3.x supposed to forbid mixed type comparisons
> unless the types implement suitable handling?

Yes, it is fixed in 3.0.  Unfortunately it's well established
behaviour in 2.x, so it won't be changing there.  Don't bother
reporting a bug about this unless it's about 3.0.


From gregturn at mindspring.com  Fri May 30 15:00:48 2008
From: gregturn at mindspring.com (Goldfish)
Date: Fri, 30 May 2008 12:00:48 -0700 (PDT)
Subject: Spring Python version 0.5.0 is released
Message-ID: <b560b7a1-2e04-426a-b433-a897e7642405@x41g2000hsb.googlegroups.com>

Spring Python (http://springpython.webfactional.com) version 0.5.0 was
released today.

It contains updates to DatabaseTemplate and DatabaseTransactions,
along with more testing underneath MySQL, PostGreSQL, and Sqlite.
Support for Oracle has been added, but only minimally tested so far.

Spring Python has been re-licensed underneath the Apache License 2.0,
making it more business friendly.

Greg


From squareswallower at 1ya2hoo3.net  Thu May  8 01:42:07 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Wed, 7 May 2008 23:42:07 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
Message-ID: <fvu3rf$je4$1@news.xmission.com>

This is what i've came up with.  My problem is that I can't get them to 
properly evaluate.. when  comparewords() runs it finds itself...  
Should I have the keys of mapdict iterate over itself?  Is that 
possible?

def annafind():
	fin = open('text.txt')		# file has one word per line
	mapdic = {}			# each word gets sorted & goes in here
	for line in fin:
		rawword = line.strip()
		word = list(rawword)
		word.sort()
		mapdic[''.join(word)] = 0
	return mapdic


def comparewords(): ***not working as intended
	fin = open('text.txt')
	for line in fin:
		line = line.strip()
		word = list(line)
		word.sort()
		sortedword = (''.join(word))
		if sortedword in mapdic:
			print line




On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com> said:

> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>
> wrote:
> 
>> Hi All,
>> 
>> I wrote a program that takes a string sequence and finds all the words
> 
>> inside a text file (one word per line) and prints them:
>> 
>> def anagfind(letters): 	#find anagrams of these letters
>> 	fin = open('text.txt')	#one word per line file
>> 	wordbox = []		 #this is where the words will go
>> 	for line in fin:
>> 		word = line.strip()
>> 		count = 0
>> 		for char in letters:
>> 			if char not in word:
>> 				break
>> 			else:
>> 				count += 1
>> 			if count == len(word):
>> 				wordbox.append(word)
>> 	return wordbox
>> 
>> Now I'd like to modify the code to naturally find all anagrams inside
> a
>> wordlist.  What would be the best way to do this?  Using Hints?  Is it
> 
>> possible to iterate over dict keys?  How can I make a dict that maps
> 
>> from a set of letters to a list of words that are spelled from those
> 
>> letters?  Wouldn't I need to make the set of letters a key in a dict?
>> 
>> As always - Thanks for helping someone trying to learn...
>> 
>> Dave
>> 
> 
> Suggestion: for each word, sort their characters and use them as the
> dictionary key.  If two words have the same combination of characters,
> then they are anagrams.  For example: "edam" and "made" are anagrams
> because they have the letters 'a', 'd', 'e' and 'm'.
> 
> Refer "Programming Pearls" by Jon Bentley.
> 
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</ a>




From zerty.david at gmail.com  Thu May  8 21:44:39 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 22:44:39 -0300
Subject: Weird bug with an integer
Message-ID: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>

Look this slice of code:

rowN = int(0)
        for row in rows:
            success = self.resultGrid.AppendRows();
            colN = int(0)
            for col in row:
                self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
- 1,colN,isReadOnly = True)
                print rowN
                self.resultGrid.SetCellValue(int(rowN),int(colN),col)

I am getting this output:
0
0
0
0
0
0
0
(1,)
Traceback (most recent call last):
     in populateGrid
    self.resultGrid.SetCellValue(int(rowN),int(colN),col)
TypeError: int() argument must be a string or a number, not 'tuple'


Why is this happening?
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From workitharder at gmail.com  Wed May 21 20:56:38 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:56:38 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com> 
	<4834C05D.6020608@gmail.com>
Message-ID: <0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>

On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
> bukzor wrote:
> > On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> >> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>
> >>> what are the simple ways?
> >>> I could think of os.open(), os.exec(touch file)
> >>> are there any simpler methods?
> >> Just use os.path.exists to check for file existence and open() as
> >> replacement for touch.
>
> >>>>> import os
> >>>>> if not os.path.exists('file'):
> >> ...     open('file', 'w').close()
> >> ...
>
> >> --- Giampaolohttp://code.google.com/p/pyftpdlib/
>
> > As simple as it gets is a single builtin function call:
>
> > open("somefile.txt", "a")
>
> > Leave out the ,"a" if you don't mind blanking a pre-existing file.
>
> Thanks :-)
>
> That reminds me to check if I could quickly nullify a file if it exists
>
> if os.path.exists('file'):
>         open('file', 'w').close()
>
> Right?

You only want to blank it if it exists? If it doesn't exist you won't
create it.
The .close() is superlative: since you don't keep the value, it gets
deallocated and closed by the destructor.


From johnjsal at NOSPAMgmail.com  Mon May 12 13:27:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 12 May 2008 13:27:57 -0400
Subject: Learning Python for no reason
Message-ID: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>

Just something that crosses my mind every time I delve into "Learning 
Python" each night. Does anyone see any value in learning Python when you 
don't need to for school, work, or any other reason? I mean, sure, there's 
value in learning anything at any time, but for something like a programming 
language, I can't help but feel that I will be mostly unable to use what I 
learn simply because I have no reason to use it.

The *process* of learning is enough fun for me, and every now and then I do 
find a small use for Python that really pays off, but for the most part I'm 
wondering what people's thoughts are as far as simply learning it for the 
sake of learning. Does it seem like a silly endeavor to most people? Did 
anyone here learn a programming language when you didn't need to? If so, how 
much and in what capacity did you use it after you learned it?

Hopefully this question even makes sense! 




From jcd at sdf.lonestar.org  Sat May 24 19:21:01 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sat, 24 May 2008 19:21:01 -0400
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in  python coding?
In-Reply-To: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <1211671262.21932.44.camel@jcd-desktop>

On Sat, 2008-05-24 at 15:36 -0700, zxo102 wrote:
> Hi,
>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?
> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.
>    Thanks.
> 
> ouyang

A string is made up of a list of bytes, and when you use hexadecimal
character references, the \ and the x do not represent bytes on their
own, hence they cannot be manipulated as though they were individual
characters of the string.  The sequence \xNN is one byte, as a unit.  It
cannot be divided.  So if you try:

'\x%s" % 'ef'

you will get an error, because you are substituting a two-byte string
'ef', where in fact you only wanted to complete the one byte in
question.  \x can never be separated from the two hexadecimal digits
that follow it.  They must be treated as a unit.  To get the two-byte
string 'ef' converted to the one byte character '\xef', you have to find
a way to get the numerical value of ef, and create a character of that
value.  The first part is done as follows:

int('ef', 16)

which means "get the integer value of 'ef', where 'ef' is represented in
base 16.  In order to get the byte of hexadecimal numeric value 0xef,
you use the chr() function:

'\xef' == chr(int('ef', 16))

Or if you are working with unicode, use unichr() instead of chr().

If you always treat \xNN escape sequences as indivisible, you won't go
wrong.

Cheers,
Cliff



From gagsl-py2 at yahoo.com.ar  Tue May  6 00:16:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 01:16:10 -0300
Subject: threading: getting latest elements from list/dict
References: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
	<17d58cc40805050426w3282bb3eyc9c1831d1d37d705@mail.gmail.com>
Message-ID: <op.uapss8q1x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 08:26:45 -0300, Vaibhav.bhawsar  
<bhawsar.vaibhav at gmail.com> escribi?:

> Hello
> I have a thread updating a dictionary with new elements. How can I check  
> for
> new elements as they are inserted into the dictionary by the thread? In
> general is it safe to read a dictionary or a list while it is being  
> updated
> by a running thread? Does the dictionary or list have to be locked while
> reading?
> many questions! :)

Use a Queue object to communicate between threads. The language itself  
doesn't guarantee anything about atomicity.
You might put the new elements in a queue, and make the consumer update  
the dictionary instead of the producer.


-- 
Gabriel Genellina



From alex.m.gusarov at gmail.com  Tue May 27 07:50:36 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:50:36 +0700
Subject: graphical ide??
In-Reply-To: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
Message-ID: <ac6dcb3d0805270450u7861b679k5f80a4260829eee3@mail.gmail.com>

I tried Eric (on windows), but then decided in favour of Eclipse +
PyDev. It's really good combination and if you want to develop PyQt
apps, you can also install Qt Integration plugin to Eclipse, so you
will have all what you need for PyQt development, include form
designer and resource editor. PyQt + Eclipse Qt plugin distributed
under GPL.

--
Best regards, Alex Gusarov
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From castironpi at gmail.com  Tue May 13 06:26:11 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:26:11 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <feb2956d-7320-4e79-8e39-e4431ec32bea@24g2000hsh.googlegroups.com>

On May 13, 5:10?am, wxPytho... at gmail.com wrote:
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.
>
> How is with this issue in Python 3.0? Is it fixed? Does Python handle
> this things properly now?

Ooo.  Timing.  Good one.  <joins rip on 3.0>

Writer's other wanderings bring Microsoft Research.  Who talks to that
on a daily basis?


From metallourlante at gmail.com  Sat May 17 10:03:27 2008
From: metallourlante at gmail.com (Alex)
Date: Sat, 17 May 2008 07:03:27 -0700 (PDT)
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
	<262b4f46-f3d6-4a29-b7a6-91eb279d1f29@j22g2000hsf.googlegroups.com>
Message-ID: <334cc5e1-5f28-4f74-b316-7d30b194f4ab@8g2000hse.googlegroups.com>

On May 17, 2:23 pm, Jeff <jeffo... at gmail.com> wrote:
> Your worker threads wait around forever because there is no place for
> them to exit.  Queue.get() by default blocks until there is an item in
> the queue available.  You can do something like this to cause the
> worker to quit when the queue is empty.  Just make sure that you fill
> the queue before starting the worker threads.
>
> from Queue import Queue, Empty
>
> # in your worker
> while True:
>   try:
>     item = q.get(block=False)
>   except Empty:
>     break
>   do_something_with_item()
>   q.task_done()
>
> You can also use a condition variable and a lock or a semaphore to
> signal the worker threads that all work has completed.

Thanks a lot, it works!


Alex


From castironpi at gmail.com  Wed May 14 13:08:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:08:49 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
	<iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com> 
	<TSF*qAScs@news.chiark.greenend.org.uk>
Message-ID: <de66df5a-da64-4f34-b3b1-96bc355aca71@f63g2000hsf.googlegroups.com>

On May 14, 11:58?am, Matthew Woodcraft
<matth... at chiark.greenend.org.uk> wrote:
> I V ?<ivle... at gmail.com> wrote:
>
> > I hadn't heard of operator.truth before. Does it do anything different
> > from bool(x) ?
>
> Not really. It was occasionally useful before the bool type existed;
> now it's just a leftover.
>
> -M-

Now as for ints, I could see that going in to 8-by-8s and crosses.
Anyone for?


From jcd at sdf.lonestar.org  Thu May  8 16:36:44 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 16:36:44 -0400
Subject: Surprising difference in behavior between "import blah" and
	"from blah import thing"
In-Reply-To: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
Message-ID: <1210279004.12106.25.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 12:00 -0700, Eric Hanchrow wrote:
> (This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)
> 
> This seems so basic that I'm surprised that I didn't find anything
> about it in the FAQ.  (Yes, I am fairly new to Python.)
> 
> Here are three tiny files:
> 
> ==== mut.py ====
> 
>     import system
>     from system import thing
> 
>     def doit():
>         print "       thing is", thing
> 
>     def do_it_slightly_differently():
>         print "system.thing is", system.thing
> 
> ==== system.py ====
>     thing = "I am the original thing!!"
> 
> ==== test.py ====
>     import mut
>     mut.doit()
>     mut.do_it_slightly_differently()
>     import system
> 
>     system.thing = "The new improved thing"
>     mut.doit()
>     mut.do_it_slightly_differently()
> 
> When I run "python test.py", I see
> 
>            thing is I am the original thing!!
>     system.thing is I am the original thing!!
>            thing is I am the original thing!!
>     system.thing is The new improved thing
> 
> What surprises me is that the assignment to "system.thing" in test.py
> only seems to affect the use of "system.thing" in mut.py, and not
> affect the use of just plain "thing" in that same file.  I would have
> expected my assignment to have affected both, or perhaps neither.
> 
> I have no idea why these two differ.  Can someone explain?

It's the same reason as this:

>>> x=5
>>> y=x
>>> x
5
>>> y
5
>>> x=6
>>> x
6
>>> y
5
>>> 

Python "variables" are just names that point at objects.  When you
import, the imported module gets bound to a name.  When you use the an
assignment statement, you bind a new object to the name, but other names
bound to the object are not affected.  

So in your code, when you say 

>>> system.thing = "The new improved thing"

You rebind the name system.thing, but the object it was originally bound
to is unaffected.  Strings are immutable, so you couldn't change that
object if you tried.  thing is still bound to the original object.
Another feature of this behavior is as follows:
>>> x=5
>>> x is y
True
>>> x=5
>>> y=x
>>> x is y
True
>>> x=6
>>> x is y
False
>>> 

The "is" operator tells you that the two objects are the same object.
When you reassign one, it no longer points to the same object as the
other.  You would get the same behaviour in your code comparing
system.thing and thing.

Cheers,
Cliff




From lew at lewscanon.com  Thu May  8 06:52:22 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 08 May 2008 06:52:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
Message-ID: <oaGdnQFiu-v7Rr_VnZ2dnUVZ_qrinZ2d@comcast.com>

kodifik at eurogaran.com wrote:
>>          |   PLEASE DO NOT   |            :.:\:\:/:/:.:
>>          |  FEED THE TROLLS  |           :=.' -   - '.=:
> 
> I don't think Xah is trolling here (contrary to his/her habit)
> but posing an interesting matter of discussion.

Interesting is in the eye of the beholder.  After you'd read the same recycled 
crud from certain posters again and again, it because trollish spam.

-- 
Lew


From deets at nospam.web.de  Mon May 19 10:01:37 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 16:01:37 +0200
Subject: printing class __dict__
References: <691285ac-b506-4d9a-8a4c-9a7d53dc9438@b9g2000prh.googlegroups.com>
Message-ID: <69dfj3F32oohpU1@mid.uni-berlin.de>

piyush.subscription at gmail.com wrote:

> hi,
> i am a newbie. so bear wth me
> i wrote a program like this
> --
> class H(object):
>  def __init__( self):
>   self.data =10
>  def e ( self ):
>   pass
>  def f ( self ):
>   pass
> 
> class H1(H):
>     x2 = 11
>     def __init__(self):
>         self.x = 10
> 
> class details(object):
>     def data(self,className):
>         print classname.__dict__
>         print classname.__name__
>         print classname.__bases__
> 
> bc = details()
> bc.data(H1)
> 
> when i run it, i get error like this
> NameError: global name 'classname' is not defined
> 
> can't i pass 'class' like an 'object'?
> 
> any suggestions to access other classes details inside a class?

Python is case-sensitive. Now analyze your code.

Diez


From john106henry at hotmail.com  Tue May  6 22:07:30 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 6 May 2008 19:07:30 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
	<070fc7e3-3e51-40b2-a6f2-026d00f8fa2f@m73g2000hsh.googlegroups.com>
Message-ID: <84375e0d-fa3e-4d0f-9701-c0a9f0dd94cc@p39g2000prm.googlegroups.com>

On May 5, 11:04 am, jbarci... at gmail.com wrote:
> John, you are the man
>
> > during my search for perfection, I found Qooxdoo (http://qooxdoo.org/).
>
> > ...
>
> > I found QxTransformer (http://sites.google.com/a/qxtransformer.org/qxtransformer/Home) which is a
> > XSLT toolkit that creats XML code that invoke qooxdoo.
>
> Qooxdoo is indeed really impressive. But I read that YAHOO will serve
> the javascript files for you from their CDN when you use YUI, for
> free, and that's no peanuts, so I wonder, did you find anything at all
> like that that could be used with YUI?
>

Sorry but I don't know any of this.  I am pretty new to web
programming.

> I have evaluated XForms, Laszlo, Flex, ZK, ... but I have to say
> QxTransformer is the cleverest solution I have found so far (thanks to
> you). I love it.
>
> > I want Pythoncard.
>
> I feel with you
>

I have done quite a bit of work to improve things.  We are now
officially calling the project PyQooxCard.  See:

http://sites.google.com/a/qxtransformer.org/qxtransformer/Home

I put together my first app which took less than a day.  Not bad
because there are 36 screens, and over 100 data fields.  See:

http://epc.powersystemadvisors.com

3 cheers to PythonCard.


> Thanks!
> Jaime



From deets at nospam.web.de  Wed May 21 02:25:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 08:25:00 +0200
Subject: Processing in Python
In-Reply-To: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <69htifF319c5iU1@mid.uni-berlin.de>

Istvan Albert schrieb:
> On May 20, 6:13 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Salvatore DI DI0 schrieb:
>>
>>> Hello,
>>> The Processing Graphics language has been implemented in Javascript.
>> No, it hasn't. Processing is written in Java.
> 
> He meant it has been re-implemented in Javascript:
> 
> http://ejohn.org/blog/processingjs/

I even tried to google to be sure that my statement was true - but the 
terms are to generic :(

> The closest python based equivalent of Processing is NodeBox but it is
> a OS X product:
> 
> http://nodebox.net/code/index.php/Home

That *really* looks promising! Thanks for that link.


Diez


From guillermo.listas at googlemail.com  Mon May 12 12:19:00 2008
From: guillermo.listas at googlemail.com (Guillermo)
Date: Mon, 12 May 2008 09:19:00 -0700 (PDT)
Subject: passing *args "recursively"
Message-ID: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>


Hi,

This must be very basic, but how'd you pass the same *args several
levels deep?


def func2(*args)

    print args # ((1, 2, 3),)
    # i want this to output (1, 2, 3) as func1!
    # there must be some better way than args[0]?

def func1(*args):

    print args # (1, 2, 3)
    func2(args)

func1(1,2,3)

Thanks!

Guillermo


From seberino at spawar.navy.mil  Wed May  7 14:53:46 2008
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: Wed, 7 May 2008 11:53:46 -0700 (PDT)
Subject: Bad form to access a *private variable* like _foo?
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
	<48200a7f$0$23642$426a74cc@news.free.fr>
	<68aq4nF2r9b93U4@mid.uni-berlin.de>
Message-ID: <c6a99aff-43be-426c-b956-71b9942ba52d@u6g2000prc.googlegroups.com>

On May 6, 3:27 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> There are other ways. For example,
>
> sqlobject.sqlhub.threadingLocal.connection
>
> if your system is using multiple threads correctly. Generally speaking,
> sqlhub could/should be used.

That's actually quite involved.  You must first get a reference to a
PackageHub object, then invoke connectionToURI, etc.  lots of steps!

cs


From kerstin.viltersten at semcon.com  Tue May 27 04:54:36 2008
From: kerstin.viltersten at semcon.com (Giraffe)
Date: Tue, 27 May 2008 01:54:36 -0700 (PDT)
Subject: Problems with Python IDLE
Message-ID: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>

I have the followong class in a file:
--------------------------------------------
class someClass:
   def __init__ (self):
      self.someVar = 10

   def getSomeVar (self):
      return self.someVar
--------------------------------------------

In another file a do the following:
--------------------------------------------
tmp = someClass ()
tmp.getSomeVar ()
--------------------------------------------

I run the second file in the IDLE environment and everything seems to
be working fine until I start to modify in the first file:
--------------------------------------------
class someClass:
   def __init__ (self):
      self.someVar = 10

   def getSomeVar (self):
      print "Modified class!"
      return self.someVar
-------------------------------------------

When I now try to run the second file in the IDLE environment again, I
DO NOT get the newly added printout. I have saved and compiled (run)
both files but there is still no change. What have I missed?



From cheryl.giomi at comcast.net  Sat May 17 14:18:29 2008
From: cheryl.giomi at comcast.net (cher)
Date: Sat, 17 May 2008 11:18:29 -0700
Subject: smtplib "authentication required" error
References: 1143858027.337885.24650@j33g2000cwa.googlegroups.com
Message-ID: <482F2175.1070702@comcast.net>

Hey,

Don't know if you can help, but I'm trying to import archived messages 
from Thunderbird into my gmail account and keep getting these types of 
errors.  I am using the GML program to help incorporate, but the SMTP 
server is not being recognized by gmail.  Am I doing something wrong?  
Anything else I can try?
SMTP I've tried:
    smtp.gmail.com
    gsmtp56.google.com

Error Val : (530, '5.7.0 Must issue a STARTTLS command first. 
m29sm9416768poh.4',
*** 76 ERROR SENDING MESSAGE FROM: rick at bassisloadeddj.com
*** UNABLE TO CONNECT TO SERVER OR SEND MESSAGE. ERROR FOLLOWS.
Error Type: smtplib.SMTPSenderRefused
Error Val : (530, '5.7.0 Must issue a STARTTLS command first. 
n22sm9448670pof.3', 'rick at bassisloadeddj.com')

Thanks,
Cher




From mal at egenix.com  Thu May  8 12:08:28 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 08 May 2008 18:08:28 +0200
Subject: Writing elapsed time as a string
In-Reply-To: <op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <481B67E5.7040507@googlemail.com>
	<op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <4823257C.3070106@egenix.com>

On 2008-05-08 14:31, Gabriel Genellina wrote:
> En Fri, 02 May 2008 16:13:41 -0300, Simon Pickles <sipickles at googlemail.com> escribi?:
> 
>> I'm sorry if this has been asked a thousand (million) times.
>>
>> Is there a nifty pythonesque way to produce a string representing an
>> elapsed time period, in terms of years, months, days, hours, mins, seconds?
>>
>> I am storing times in a MySQL db, and would love to be able to write the
>> time elapsed between accesses of certain data. These are in seconds
>> since the epoch, as produced by time.time()

Using mxDateTime that's pretty easy (using number of days):

 >>> from mx.DateTime import *
 >>> delta = now() - Date(2000,1,1)
 >>> print delta
3050:18:01:25.91

or, if you'd rather like to see things broken down as relative
date/time diff (this is a calendar based diff):

 >>> print RelativeDateTimeDiff(now(), Date(2000,1,1))
(+0008)-(+04)-(+07) (+18):(+04):(+41)

i.e. 8 years, 4 months, 7 days, etc.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 08 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From rileyrgdev at gmail.com  Mon May 12 09:10:44 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Mon, 12 May 2008 15:10:44 +0200
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
Message-ID: <g09fko$hhl$3@registered.motzarella.org>

Yves Dorfsman <yves at zioup.com> writes:

> D'Arcy J.M. Cain wrote:
>> On Mon, 12 May 2008 02:28:13 GMT
>> Yves Dorfsman <yves at zioup.com> wrote:
>>> particular case, there's got to be a better way than:
>>>
>>> d = time.local()
>>> y = d[0]
>>> d = d[1]
>>
>> Like this?
>>
>>     y, d = time.local()[:2]
>
> Sorry this was a typo (again :-), I meant:
>
> d = time.local()
>   y = d[0]
>   d = d[2]
>
> Yves.
> http://www.SollerS.ca

or .localtime()? or is this local() specific to a different python
version?



From bruno.desthuilliers at gmail.com  Mon May  5 16:31:02 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 5 May 2008 13:31:02 -0700 (PDT)
Subject: Colors for Rows
References: <4dc0cfea0804290733ic99e45eyec23a6d5b719eb8@mail.gmail.com> 
	<mailman.332.1209485479.12834.python-list@python.org>
Message-ID: <55f7573f-bb55-483b-9e59-12f0469174a3@f63g2000hsf.googlegroups.com>

> On Tue, 29 Apr 2008 09:33:32 -0500
> "Victor Subervi" <victorsube... at gmail.com> wrote:

>   print '<tr bgcolor="%s">' % bg

<op>
<hs topic="html css">

You'd better learn to use css instead.

</hs>
</op>


From __peter__ at web.de  Tue May 27 06:01:31 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 May 2008 12:01:31 +0200
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
Message-ID: <g1gm5p$l5k$03$1@news.t-online.com>

Giraffe wrote:

> I have the followong class in a file:
> --------------------------------------------
> class someClass:
>    def __init__ (self):
>       self.someVar = 10
> 
>    def getSomeVar (self):
>       return self.someVar
> --------------------------------------------
> 
> In another file a do the following:
> --------------------------------------------
> tmp = someClass ()
> tmp.getSomeVar ()
> --------------------------------------------
> 
> I run the second file in the IDLE environment and everything seems to
> be working fine until I start to modify in the first file:
> --------------------------------------------
> class someClass:
>    def __init__ (self):
>       self.someVar = 10
> 
>    def getSomeVar (self):
>       print "Modified class!"
>       return self.someVar
> -------------------------------------------
> 
> When I now try to run the second file in the IDLE environment again, I
> DO NOT get the newly added printout. I have saved and compiled (run)
> both files but there is still no change. What have I missed?

You probably start idle with the -n option. If so, IDLE shows something like

IDLE 1.2.1      ==== No Subprocess ====

in its shell. Here's what IDLE's help says about that:

"""
Running without a subprocess:

        If IDLE is started with the -n command line switch it will run in a
        single process and will not create the subprocess which runs the RPC
        Python execution server.  This can be useful if Python cannot create
        the subprocess or the RPC socket interface on your platform.  However,
        in this mode user code is not isolated from IDLE itself.  Also, the
        environment is not restarted when Run/Run Module (F5) is selected.  If
        your code has been modified, you must reload() the affected modules and
        re-import any specific items (e.g. from foo import baz) if the changes
        are to take effect.  For these reasons, it is preferable to run IDLE
        with the default subprocess if at all possible.
"""

If you use a shortcut to start IDLE, remove the -n option and you should be
OK.

Peter


From dullrich at sprynet.com  Wed May 14 17:15:41 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 16:15:41 -0500
Subject: "indexed properties"...
Message-ID: <dullrich-12933F.16154114052008@text.giganews.com>

Having a hard time phrasing this in the form
of a question...

The other day I saw a thread where someone asked
about overrideable properties and nobody offered
the advice that properties are Bad. So maybe we've
got over that. I suppose properties could have 
Bad consequences if a user doesn't know they exist
and think that a certain property of an object is
just an ordinary attribute. But that applies to
almost any aspect of any language.

If a person comes from, say, Object Pascal (Delphi)
then properties are hard to live without. The
other day I decided I wanted what OP calls an
"indexed property" or "array property". Couldn't 
figure out how to make a _property_ behave that way.
So I read a little bit about descriptors, and a
few minutes later I had an indexedproperty thing
that works just like property, except it gives
an indexed property! This is just too cool.

Why? For example, a Matrix should have a row[n]
property allowing things like

m.row[0] = m.row[1] + m.row[2]

Ok, you could do _that_ by just making row
an ordinary list of Row objects. But then
you'd have to say

m.row[0] = Row([1,2,3])

where I want to be able to say

m.row[0] = [1,2,3]

and have the Row created automatically.

_Also_ with these indexed properties my Matrix
can have m.row[j] and m.col[k] that look exactly
the same to a client - we don't want to store a
list of rows internally and also store the same
data in a list of columns. Too cool.

Hmm, none of that's a valid excuse for a post here.
Um, right, here we go: Anyone see problems or
possible improvements with the implementation
of indexedproperty below?

"""indexed.py: "indexedproperty" works more or less
like "property" except it gives what in Object Pascal
would be an "indexed property". See the 
__name__="__main__" section below for a demo

"""

class WriteOnlyIP(Exception):
  def __str__(self): 
    return """

indexed property is write-only

"""

class ReadOnlyIP(Exception):
  def __str__(self):
    return """

indexed property is read-only

"""

class indexedproperty(object):
  def __init__(self, getitem=None, setitem=None):
    self.getitem = getitem
    self.setitem = setitem

  def __get__(self, obj, owner):
    self.obj = obj
    return self

  def __getitem__(self, index):
    if self.getitem:
      return self.getitem(self.obj, index)
    else:
      raise WriteOnlyIP

  def __setitem__(self, index, value):
    if self.setitem:
      self.setitem(self.obj, index, value)
    else:
      raise ReadOnlyIP


if __name__ == "__main__":

  class AClass(object):
    def __init__(self):
      self.cells = [[0,0], [0,0]]

    def SetCell(self, (row, col), value):
      self.cells[row][col] = value

    def GetCell(self, (row, col)):
      return self.cells[row][col]

    cell = indexedproperty(GetCell, SetCell)

  C = AClass()
  for row in range(2):
    for col in range(2):
      C.cell[row, col] = "row: %s, col: %s" % (row, col)

  for row in range(2):
    for col in range(2):
      print C.cell[row, col]

  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]

  print "After  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]:"

  for row in range(2):
    for col in range(2):
      print C.cell[row, col]

-- 
David C. Ullrich


From mensanator at aol.com  Fri May  9 00:50:17 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 21:50:17 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de> 
	<1210306536.4823cfe8be627@comuh.uh.cu>
	<mailman.835.1210307342.12834.python-list@python.org>
Message-ID: <4fcecd86-eb19-4443-b218-fc4cfcd4a36c@m3g2000hsc.googlegroups.com>

On May 8, 11:28?pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > ?Weird, I can't find neither... (which wikipedia article? Couldn't find one about
> > ?C99.)
>
> Tryhttp://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power

So it IS correct.


From upton at virginia.edu  Tue May 13 11:50:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 11:50:19 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <5504f9ac0805130850u395ce913le84d65d172c76069@mail.gmail.com>

On Tue, May 13, 2008 at 11:24 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> >  The "Flaming Thunder" looks promising, but without being free
>  > software, it's unlikely it will create a large developer community,
>  > specially considering both free general purpose and scientific
>  > programming languages.
>
>  Perhaps.  Flaming Thunder is only $19.95 per year for an individual
>  (and even less per individual for site licenses), which is less than
>  the cost of just one book on Python.

Bah, subscription for a programming language?  As far as I'm
concerned, that's reason enough not to bother with it.  Paying a
one-time fee, or even once per upgrade, for a full-featured IDE and
lots of support tools is painful but at least justifiable, whereas
paying a yearly license just to even be able to try something out when
there are so many free, sufficient options... There was an article
on/in Wired not so long ago about the economics of free, and how
there's a huge difference mentally between free and not-free, even if
the practical difference is "free" and "$0.01."  (Also, I assume
hdante meant, at least partly, free as in speech, not free as in
beer.)

As an aside, I clearly haven't written anything in FT, but looking at
your examples I don't know that I would want to--there's something
that feels very unnatural about writing English as code.  It also
somehow seems a bit verbose, while one of the strengths of something
like Python (since that's what you're comparing it to) is rapid
implementation.  Just using your "Set ... to" idiom, rather than a
regular = assignment, makes things much more wordy, without improving
readability.  Some of your other structures are awkward, for instance
"Something is a function doing" Again, more text with arguably no gain
in readability.

Just my two cents, anyway.  I now return you to the resident madman,
who I see has sent 4 or 5 messages while I was typing this one...


From george.sakkis at gmail.com  Fri May  9 09:24:19 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 06:24:19 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <50ea9d09-a315-4342-aaac-f5d8e5c5da15@x41g2000hsb.googlegroups.com>

On May 9, 9:02?am, Viktor <alefn... at gmail.com> wrote:
> This completely slipped of my mind... :)
>
> I'm trying to change the:http://wordaligned.org/svn/etc/echo/echo.py
>
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
>
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function - tried
> with inspect also)... And what is most interesting, when I do:
>
> def w(fn):
> ? ? print 'fn:', id(fn)
> ? ? return fn
>
> class A:
> ? ? @w
> ? ? def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
>
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...
>
> Is there a way to find out in the decorator "what will the decorated
> function be"?

The decorator does receive the correct function. The problem is that
at this point __init__ is still a plain function, not a method, i.e.
the sequence is:
   function -> decorated function -> method

There are several workarounds if you really want to differentiate
between functions and methods, none of them perfect:

- Apply the decorator after the class has been built, i.e. after the
functions have been wrapped in (unbound) methods:
    A.__init__ = w(A.__init__)

- (Risky Hack): Guess whether a function is intended to be wrapped in
a method by checking whether its first argument is named "self".
Obviously this is not foolproof and it doesn't work for static/class
methods.

- Have two different decorators, one intended for plain functions and
one for functions-to-be-methods (e.g. @deco, @decomethod).

George


From timj at tolisgroup.com  Mon May  5 13:43:58 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 10:43:58 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
Message-ID: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>

Hi Folks,

Searched the archives, but I can only find mention of db.h problems
relating to Linux.

I've downloaded the source for 2.5.2 and am trying to compile it in
Visual Studio 6 (SP6).  The error reports read:

--------------------Configuration: _bsddb - Win32
Debug--------------------
Compiling...
_bsddb.c
C:\Documents and Settings\Tim\My Documents\Python-2.5.2\Modules
\_bsddb.c(90) : fatal error C1083: Cannot open include file: 'db.h':
No such file or directory
Error executing cl.exe.

_bsddb_d.pyd - 1 error(s), 0 warning(s)

Any pointers?  A prerequisite that I might be missing?  The source is
the Python-2.5.2.tar.gz from the Python.org site.

Thanks for any help,
Tim


From hdante at gmail.com  Sun May  4 11:19:34 2008
From: hdante at gmail.com (hdante)
Date: Sun, 4 May 2008 08:19:34 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
	<b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>
	<d8e056dd-95bf-4704-9dc0-79310db50e32@a23g2000hsc.googlegroups.com>
Message-ID: <ee919023-8af1-4c28-9b4b-34d49152730a@25g2000hsx.googlegroups.com>

On May 3, 7:05?pm, sturlamolden <sturlamol... at yahoo.no> wrote:
> On May 3, 10:13 pm, hdante <hda... at gmail.com> wrote:
>
> > ?I believe that moving this to third party could be better. What about
> > numpy ? Doesn't it already have something similar ?
>
> Yes, Kahan summation makes sence for numpy arrays. But the problem
> with this algorithm is optimizing compilers. The programmer will be

 No, optimizing compilers shouldn't discard floating point operations
by default, since it changes program behavior. If they do, at least
there should be a flag to turn it off.

> forced to use tricks like inline assembly to get around the optimizer.
> If not, the optimizer would remove the desired features of the
> algorithm. But then we have a serious portability problem.



From ewertman at gmail.com  Thu May 29 20:43:41 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Thu, 29 May 2008 20:43:41 -0400
Subject: Code execution in imported modules
Message-ID: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>

So I'm working on some file parsing and building up a stack of regular
expressions that I need to use.  I was thinking of dropping them in an
external module.  I was wondering.. if I put them in a file called
regex.py like so :

import re

re1 = "..
re2 = "..

and then do:

rgx1 = re.compile(re1)
rgx2 = re.compile(re2)


and, in my script, parse.py py I do:

from regex import *

text = "bunch of stuff......."

m = rgx1.search(text)


Does the re get compiled when I import it, or every time I call it?
Since I'm calling it often, I'd like to compile it once.

Thanks!


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:56:07 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:56:07 -0300
Subject: how to pass a python socket to a .dll?
References: <HJiWj.2720$Kk3.1386@bignews9.bellsouth.net>
Message-ID: <op.ua4nztgax6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 12:48:26 -0300, inhahe <inhahe at gmail.com> escribi?:

> i'm trying to make a .dll that will let me use WSAPoll, which is a  
> windows
> sockets function, to mimic select.poll on a windows box.  i cbb learning
> python extensions, so i'm just going to use ctypes with a dll, so I hope
> that it doesn't bring up a big performance issue.   anyway, the problem  
> is
> that I want to use Python-created sockets with it, but WSAPoll requires
> winsock2.h SOCKET objects.

Use the fileno() method to get the SOCKET handle.
If you're going to use ctypes anyway, why bother to write a DLL? Just  
declare the required structures and functions using ctypes. Good luck!

-- 
Gabriel Genellina



From upton at virginia.edu  Wed May 21 12:42:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:42:44 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>
Message-ID: <5504f9ac0805210942r54de2f1fl2230c7e297acd5b6@mail.gmail.com>

On Wed, May 21, 2008 at 12:33 PM, Daniel Fetchinson
<fetchinson at googlemail.com> wrote:
>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>>
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>>
>> Arf ! A goto !
>
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?
>
And in the Linux kernel, and probably lots of other places
too--several places I've seen it used, they explain it as "this helps
clue in the optimizer" or something to that effect.  (That doesn't
mean it's a good idea to use it in everyday code though.)


From mnikhil at gmail.com  Thu May 29 17:30:59 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 30 May 2008 03:00:59 +0530
Subject: make a string a list
Message-ID: <g1n7an$1dr$1@registered.motzarella.org>

or a string iterable ? How can I do that. I have lots of '\r\n' 
characters in the string which I think can be easier if it were made 
into a list and I can easily see if the required value (its a numeral) 
is present in it or not after some position or after some characters' 
position.

Thanks,
Nikhil


From tarun.kap at gmail.com  Mon May  5 10:17:50 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 07:17:50 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<a20c4a0f-5c58-400d-9ee6-6adcbe458433@k13g2000hse.googlegroups.com>
Message-ID: <364d19ac-6ad4-4191-864c-8f2f305d2b21@34g2000hsh.googlegroups.com>

On May 2, 1:43 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 29 Apr, 15:56,TkNeo<tarun.... at gmail.com> wrote:
>
> > I need to do SSL file transfer using python? Is there a library i can
> > use ?
>
> > Thanks.
>
> If you have patience you can wait for Python 2.6 which will include a
> new ssl module, otherwise there are a lot of third party libraries out
> there which already binds OpenSSL for Python.
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib/


Python 2.6. Ah, that sounds very nice. I would be happy to upgrade to
2.4 from 2.3.
My boss does not think we need to upgrade.


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:18:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:18:24 -0300
Subject: file locked for writing
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
Message-ID: <op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 11:57:03 -0300, Dmitry Teslenko <dteslenko at gmail.com>  
escribi?:

> Hello!
> I use some script in python 2.5 from vim editor (it has python
> bindings) that updates some file
> and then launches another program (ms visual studio, for example) to
> do something with updated file.
> I faced problem when updated file is locked for writing until vim
> editor is closed.
>
> launch vim -> update file -> launch msvc -> file locked
> launch vim -> update file -> launch msvc -> close vim -> file locked
> launch vim -> update file -> -> close vim -> launch msvc -> file okay
>
> Update code is something like that:
>
> 	backup_file_name = '<some file name>'
> 	with open(backup_file_name, 'w') as backup_file:
> 		input = sax.make_parser()
> 		output = saxutils.XMLGenerator(backup_file, 'cp1252')
> 		filter = __vcproj_config_filter('<updated file name>', input, output)
> 		filter.parse('<updated file name>')
> 	shutil.copyfile(backup_file_name, '<updated file name>')
> 	os.remove(backup_file_name)
>
> __vcproj_config_filter is a descent of a XMLFilterBase; it substitutes
> some attributes in xml file and that's all.
> must be noted that __vcproj_config_filter instance holds reference to
> output (sax xml parser) object.

Is the code above contained in a function? So all references are released  
upon function exit?
If not, you could try using: del input, output, filter
That should release all remaining references to the output file, I  
presume. Or locate the inner reference to the output file  
(filter.something perhaps?) and explicitely close it.

-- 
Gabriel Genellina



From yhvh2000 at googlemail.com  Thu May  8 23:42:59 2008
From: yhvh2000 at googlemail.com (yhvh)
Date: Thu, 8 May 2008 20:42:59 -0700 (PDT)
Subject: range with variable leading zeros
Message-ID: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>

I want to generate a range with variable leading zeros


x = [0010, 0210]
padding = len(x[1])

for j in range(x[0], x[1]):
    print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}


This is syntactically incorrect, you can't insert a variable into the
string format options. Any ideas?


From arkanes at gmail.com  Mon May 19 13:31:08 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 19 May 2008 12:31:08 -0500
Subject: Thread killing - I know I know!
In-Reply-To: <D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
Message-ID: <4866bea60805191031p2e70a085s3475e179a3799089@mail.gmail.com>

On Mon, May 19, 2008 at 11:36 AM, Roger Heathcote
<usenet at technicalbloke.com> wrote:
> sjdevnull at yahoo.com wrote:
>>
>> On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
>> wrote:<snip>
>>>
>>> Despite many peoples insistence that allowing for the arbitrary killing
>>> of threads is a cardinal sin and although I have no particular threading
>>> problem to crack right now I remain interest in the taboo that is thread
>>> killing. The real world and it's data are messy and imperfect and I can
>
> <snip>
>>
>> In general, use processes when you can and threads only when you
>> must.  OS designers spent a lot of energy implementing protected
>> memory, no sense throwing out a fair chunk of that hard work unless
>> you actually need to.
>
> Fair point, but for sub processes that need to be in close contact with the
> original app, or very small functions that you'd like 100s or 1000s of it
> seems like a kludge having to spawn whole new processes build in socket
> communications and kill via explicit OS calls. I can't see that approach
> scaling particularly well but I guess there's no choice.
>

It's not a kludge - the whole reason why killing a thread is undefined
and a "cardinal sin" is because it's in your own address space and you
can't guarantee anything about how it left things when you killed it.
You simply can't have it both ways. If you want to be able to safely
and sanely kill an uncooperative thread (*especially* third party code
you don't control) you have to isolate it from your address space, and
this means a process. This is a fundamental problem with the entire
idea of shared-state concurrency. For the record, you can't use 1000s
of threads either - if you really need 1000s of concurrent things
running you need to re-think your concurrency model and possibly your
choice of languages and environment.

The messiness of the real world is *why* you should use processes, not
a reason to avoid them.

> Does anyone think it likely that the threading module (and threading in
> general) will be improved and augmented with features like timeouts and
> arbitrary threadicide in the next year or two?  Seems there's little scope
> for tapping the power of the current generation of multiple cores with the
> current pythons, tho I appreciate breakneck speed has never been a design
> objective it looks like multicore is set to be the next generation PC
> architecture.
>

They absolutely should not be. Adding an API which can't work in the
general case and is dangerous even when it can work does not do anyone
any favors.

> Roger Heathcote - technicalbloke.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From __peter__ at web.de  Tue May 13 09:32:00 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 15:32:00 +0200
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
Message-ID: <g0c58c$qag$01$1@news.t-online.com>

Giuseppe Ottaviano wrote:

> def ichain(seq):
> ????????for s in seq:
> ????????????????for x in s: yield x
> 
> (which is often useful and I don't think it has been included in ?
> itertools) you can iterate lazily on the file:

Python 2.6 includes itertools.chain.from_iterable() with that functionality.

Peter


From sebastian.noack at googlemail.com  Wed May 28 06:13:10 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Wed, 28 May 2008 03:13:10 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
	<414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com> 
	<mailman.1645.1211893102.12834.python-list@python.org>
Message-ID: <7c614790-5233-45c2-bcda-4eee0a9c4bcb@z72g2000hsb.googlegroups.com>

That is right, only bz2 is affected. I am happy that i could help. ;)

Regards
Sebastian Noack


From dkcombs at panix.com  Thu May 29 21:08:47 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 01:08:47 +0000 (UTC)
Subject: VERY SORRY FOR THAT CROSSPOST;
	Re: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <g1nk2v$6f8$1@reader2.panix.com>

(This one is also cross-posted, to apologize to one and all
about my just-prior followup.)

I stupidly didn't remember that whatever followup I made
would also get crossposted until *after* I had kneejerked
hit "s" (send) before I noticed the warning (Pnews?) on
just how many groups it would be posted to.

A suggestion for Pnews: that as soon as you give the
F (followup for trn), ie as soon as Pnews starts-up
on this followup, before you've typed in anything
or given it a filename to include, that AT THAT TIME
it remind you that it'll be crossposted to the
following 25 newsgroups:
  1: foo
   2: comp.lang.perl.misc
  3: other-group
  4: ...


, so way before you've said anything, you can
abort it if you want to.


SORRY!


David




From rsoh.woodhouse at googlemail.com  Wed May 28 15:31:45 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 12:31:45 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
Message-ID: <0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>

On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > Hi,
>
> > I'm trying to work out some strange (to me) behaviour that I see when
> > running a python script in two different ways (I've inherited some
> > code that needs to be maintained and integrated with another lump of
> > code). The sample script is:
>
> > # Sample script, simply create a new thread and run a
> > # regular expression match in it.
> > import re
>
> > import threading
> > class TestThread(threading.Thread):
>
> >     def run(self):
> >         print('start')
> >         try:
> >             re.search('mmm', 'mmmm')
> >         except Exception, e:
> >             print e
> >         print('finish')
>
> > tmpThread = TestThread()
> > tmpThread.start()
> > tmpThread.join()
> > import time
> > for i in range(10):
> >     time.sleep(0.5)
> >     print i
>
> > # end of sample script
>
> > Now if I run this using:
>
> > $ python ThreadTest.py
>
> > then it behaves as expected, ie an output like:
>
> > start
> > finish
> > 0
> > 1
> > 2
> > ...
>
> > But if I run it as follows (how the inherited code was started):
>
> > $ python -c "import TestThread"
>
> > then I just get:
>
> > start
>
> > I know how to get around the problem but could someone with more
> > knowledge of how python works explain why this is the case?
>
> Works for me. And I don't see any reason why it shouldn't for you -
> unless you didn't show us the actual code.
>
> Diez

Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
on Ubuntu 7.10. Which version of python/what platform were you using?

Rowan


From maxerickson at gmail.com  Thu May 15 10:01:51 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 15 May 2008 14:01:51 +0000 (UTC)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <Xns9A9F660601FFCmaxericksongmailcom@80.91.229.13>

castironpi <castironpi at gmail.com> wrote:

> Why can't I write this?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

Because you don't know how?



max



From nick at craig-wood.com  Fri May 30 07:30:20 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 30 May 2008 06:30:20 -0500
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
	<slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>
	<g1mku3$ghu$1@aioe.org>
Message-ID: <slrng3vnv2.jf2.nick@irishsea.home.craig-wood.com>

Matt <mr.edel at gmx.at> wrote:
>  Okay, thanks a lot for your reply Nick, I think you pushed me back on 
>  the right way.

Good!

>  Now I started with trying to implement the callback functions and am 
>  stuck at the following point:
> 
>  I define my classes/structures/unions:
> 
>  class cdStream(Structure):
>       _fields_ = [("contextH", c_uint),
>                        ("open", c_void_p),
[snip]
>  then i define my functions (right now I do just nothing) and at the same 
>  time I define the datatypes like they're listed in my C sample program:
> 
>  def pystreamopen (contextH, mode, pErr):
>       pass
> 
>  cstreamopen = CFUNCTYPE(c_uint, c_ushort, c_uint)
[snip]
>  and now the problem starts: i want the pointers in the cdStream 
>  Structure point at my functions and tried to do it the following way:
> 
>  data = cdStgMedium()
>  data.type = 0
>  data.u.pStream.contextH = c_uint(3) #must be some kind of identifier.
>  data.u.pStream.open = cstreamopen(pystreamopen)
[snip]
>  unfortunately that doesn't work because Python returns a TypeError: 
>  incompatible types, CFunctionType instance instead of c_void_p instance
> 
>  Any ideas/help (please)?

Probably the best thing is if you define the union with the types of
the pointers to your functions instead of c_void_p, eg

  class cdStream(Structure):
       _fields_ = [("contextH", c_uint),
                        ("open", cstreamopen),
                        ("close", cstreamclose), # etc...

This will involve you re-ordering your definitions.

Or alternatively, you could cast the function pointer to a c_void_p
first, eg

  data.u.pStream.open = c_void_p( cstreamopen(pystreamopen) )

which should work but is less typesafe.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kamhung.soh at gmail.com  Mon May 19 19:05:48 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 20 May 2008 09:05:48 +1000
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
Message-ID: <op.ubfbrya3ev04yd@melwxp23>

On Tue, 20 May 2008 06:58:28 +1000, <amit.uttam at gmail.com> wrote:

> On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> amit.ut... at gmail.com writes:
>> > I've recently jumped big time into python and I'm working on a
>> > software program for testing automation.
>>
>> Welcome, to both fields :-)
>>
>
> Thanks! I am having a great time learning and coding in python. It's
> an amazing programming language.
>
>> > I had a question about proper logging of output. What I would like
>> > is:
>>
>> >  1. a function syslog (to log output to log file only)
>> >  2. a function stdout (to log output to stdout only)
>> >  3. a function sslog (to log output to both log and stdout)
>>
>> > Right now I am using StandOut module
>>
>> Have you investigated the 'logging' module in the Python standard
>> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
>> to meet your listed requirements, without need of external
>> dependencies.
>
> Hmm..Yeah I didn't realize python had its own standard logging
> facility. I took a look at it and it seems to do the job. However, the
> output seems to be syslog style output. In the program I am writing,
> the log file stores all the output of the commands being run (e.g. tcl
> scripts, etc). Will this be possible using the built in python logging
> module?
>
> Thanks,
> Amit
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You can define the format of the log output in basicConfig(), for example:

 from logging import basicConfig, error, info, INFO
...
   basicConfig(
       datefmt='%Y%m%d_T%H%M%S',
       filemode='a',
       filename=LOG_PATH,
       format='%(asctime)s,%(levelname)s,%(message)s',
       level=INFO
   )

If you want to log the output of other commands in your log file, you can  
connect a pipe to that command.  Maybe look at "subprocess -- Subprocess  
management" in http://docs.python.org/lib/module-subprocess.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From exarkun at divmod.com  Mon May  5 09:48:36 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 09:48:36 -0400
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <725404980805050641s52cac3b8mf238ff29883c6dba@mail.gmail.com>
Message-ID: <20080505134836.6859.727372751.divmod.quotient.59037@ohm>

On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>Hi!
>
>I have a C module for which I created a wrapper with swig. The function def is:
>
>C:
>
>int some_thing(unsigned char * the_str);
>
>eg:
>
>Python:
>
>some_module.some_thing (the_str)
>
>Now I would like to feed it with a UTF-8 formatted string:
>
>test = u'Make \u0633\u0644\u0627\u0645, not war.'

`test? is not a UTF-8 encoded string.  It's a unicode string.

To get a UTF-8 encoded string from a unicode string, use the `encode?
method:

    some_module.some_thing(test.encode('utf-8'))

Jean-Paul


From fred.sells at adventistcare.org  Tue May 20 09:52:12 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Tue, 20 May 2008 09:52:12 -0400
Subject: Newbie In Python
In-Reply-To: <4832a6e3$0$28693$426a74cc@news.free.fr>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B090D@acesxch01.ADVENTISTCORP.NET>

get a python-aware editor.  I vary between emacs and Eclipse, depending on my mood and the size of the project.

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of Bruno Desthuilliers
> Sent: Tuesday, May 20, 2008 6:25 AM
> To: python-list at python.org
> Subject: Re: Newbie In Python
> 
> 
> andrew.smith.cpp at gmail.com a ?crit :
> > I have Heard About "Python" its a OOD Language. 
> 
> 'OOD' => 'object oriented ???' ?
> 
> > i have to Learn it
> > where from i should start it.
> 
> Err... What about reading the docs on python.org - possibly starting 
> with the tutorial:
> http://docs.python.org/tut/tut.html
> 
> You'll find other tutorial etc here:
> http://www.python.org/doc/
> 
> 
> > i have python compiler
> 
> Just for the record, "python" is also the name of a compiler for CMU 
> Common Lisp (totally unrelated to the Python language), so make sure 
> that what you have is the CPython language install.
> 
> HTH
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From tjreedy at udel.edu  Tue May 13 03:11:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 03:11:30 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net><41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com><48275446$0$11628$607ed4bc@cv.net>
	<87mymw8nr0.fsf@benfinney.id.au><4827bda2$0$11606$607ed4bc@cv.net>
	<87od7c6qua.fsf@benfinney.id.au> <482912b7$0$11641$607ed4bc@cv.net>
Message-ID: <g0bev0$rho$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:482912b7$0$11641$607ed4bc at cv.net...
| The reason I even brought this up is because I remember someone saying a
| while back (probably here on the newsgroup) that the true use of a for
| loop was to iterate through a sequence (for the purpose of using that
| sequence), not to do something X number of times.

I believe the specific context was to counteract some people's tendency to 
write
  for i in range(len(seq)): do stuff with seq[i]
when they would better (more Pythonically) write
  for item in seq: do stuff with item
or even
  for i,item in enumerate(seq): do stuff with i and item.

One subtle but real advantage is that the latter two forms work with 
iterables that do not have a known-ahead length or which even continue 
indefinitely.

| Once they made this
| comment, I suddenly saw the for loop in a new (and I believe purer)
| light. That was the first time I realized what it was really meant
| to do.

That is an important insight.  But to me it does not negate the "do 
something n times" usage when there is no iterable other than range to 
iterate.  Do note that range has *not* been removed from 3.0 and that its 
main intended usage is for looping.

| Now, you could easily make the argument that the Python for loop is a
| much simpler tool to accomplish *both* of the above, and I suppose that
| makes sense.

Yes.  Python leans toward minimalism.  Proposals for various 
special-purpose loopin constructs have been rejected.  For-loops cover most 
looping needs; while-loops cover everything else.

Terry Jan Reedy





From terry at jon.es  Mon May  5 16:01:02 2008
From: terry at jon.es (Terry Jones)
Date: Mon, 5 May 2008 22:01:02 +0200
Subject: [Twisted-Python] Counting errors in a DeferredList and avoiding
	Unhandled error in Deferred messages
In-Reply-To: Your message at 13:38:13 on Monday, 5 May 2008
References: <18463.16271.516266.379803@jon.es>
	<20080505173813.6859.2132215018.divmod.quotient.59119@ohm>
Message-ID: <18463.26494.36090.371860@jon.es>

Hi Jean-Paul

> You can do this (if you replace `pass? with `None?, anyway) or you can pass
> `consumeErrors=True? to the `DeferredList? initializer which will make it
> do something equivalent.

Thanks. Sorry - I should have just read the docs again :-)

Terry


From ranjan.suruchi at gmail.com  Thu May  8 07:19:08 2008
From: ranjan.suruchi at gmail.com (ranjan)
Date: Thu, 8 May 2008 04:19:08 -0700 (PDT)
Subject: Urgent opening for Engineer (Open Source Technologies)
Message-ID: <2706fed6-8d00-4dd3-b6ea-815e1b607516@f24g2000prh.googlegroups.com>

Hi,This is regarding an opening for software Engineer(Open Source
Technologies)
The opening is with our client for their Noida branch.They are working
on various platforms like Microsoft,Open Source Technology.
The designation will be of software engineer/senior software engineer.
Skillset Required will be Plone,experience in development
& implementation of applications using Python & open source
technologies.
Experience : 2-3 years
Qualification : BE/B.Tech/MCA/PGDCA or equivalent.
If you are interested you can forward your CV on this mail id
ranjan.suruchi at gmail.com as early as possible.


From wojtek.gminick.walczak at gmail.com  Tue May  6 02:32:03 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 08:32:03 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
References: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
Message-ID: <2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>

2008/5/6, Yuan HOng <hongyuan1306 at gmail.com>:
>  It seems decimal object will always be larger than float in
>  comparasion, which goes against common sense:
>
>  >>> from decimal import Decimal
>  >>> a = Decimal('0.5')
>  >>> a > 99999
>  False
>  >>> a > 99999.0
>  True
>
>  It seems to me that rather than allowing this to happen, comparasion
>  between the two should either be made correct (by convertion decimal
>  to float e.g.) or forbidden, like arithmatic operations between the
>  two types.

Looks like a nasty bug.

a > 99999.0 returns True because NotImplemented > 99999.0 returns True.
a < 99999.0 returns False because NotImplemented < 99999.0 returns False.

As you can see the real comparision has nothing to do with your Decimal number.
I think you can report it at bugs.python.org.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From pavlovevidence at gmail.com  Fri May 23 21:00:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 18:00:29 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>

On May 23, 6:59 pm, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
>         printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
>         print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?


p = myfunction()
if p:
    print p

(I recommend doing it this way in C, too.)

For the case where you want to do this in an elif-clause, look for the
recent thread "C-like assignment expression?" which list some
workarounds.  Or just Google this newsgroup for "assignment
expression".  It's one of few minor irritating things in Python
syntax.


Carl Banks


From unknown_hero007 at hotmail.com  Tue May  6 08:05:21 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 05:05:21 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
Message-ID: <ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>

Tim Golden wrote:
> In a spirit of teaching people to fish...
>
> ... If you put something like "Python windows registry" into Google, you
> get quite a few hits, the top one of which is probably pointing to the stdlib
> _winreg module, but several others point towards wrapper classes, modules
> etc. which provide a simpler or at least a different interface to the registry.
>
> Have a look at those and see if you can't work out what to do.
>
> TJG

The first link which points to the Python documentation for the
_winreg module I already checked, even before coming here. I am
wondering how I should do the loop I need (go through
HKEY_LOCAL_MACHINE and read one subkey at a time, if it contains this
'foo' then change it into 'moo'). As I already said, I am by no means
an expert in Python (heck, I learned the basics only a month ago).
However, I am willing to learn.

Also my prior experience with the Windows registry is mostly by the
Registry Editor shipped with Windows. While I do understand what keys,
values and hives are, I do not have a great experience in the others.

If it's not too much to ask, maybe someone (who is much better than
me) could make a code snippet that reads a certain hive and replaces
values that are predetermined (preferably variables, not arguments if
possible).

If that's out of the question, at least push me gently into the right
direction.

So basically I am looking for these things:

1) Read one subkey from HKEY_LOCAL_MACHINE at a time (I think
QueryValueEx() is needed here)
2) Check if said subkey contains some predetermined string (like 'foo'
here)
3) If the above applies, change the value into another predetermined
string (like 'moo' here)


Also, how should I determine the length of the loop? I personally am
too fond of the for loop, but if I need to use, like, while, then so
be it.

Thanks in advance.


From deets at nospam.web.de  Wed May  7 08:36:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 14:36:51 +0200
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <68dm40F2rekquU1@mid.uni-berlin.de>

swapsun at gmail.com wrote:

> Any idea why the following program does not work? I was learning IO on
> Python and the following generates a TypeError: range() integer end
> argument expected, got str.
> I am a beginner.

Because raw_input does return you as string which you need explicitly
convert to a number, e.g. doing

i = int(input)

Diez


From skanemupp at yahoo.se  Thu May 15 12:03:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:03:31 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
Message-ID: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>

print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\trainingsetunzipped\training_set\mv_0000001.txt')

d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
sweden.gif')
d.close()

exists returns false but when i open it doesnt complain. how come?

another file that exists returned false for complained when i tried to
open it.


From castironpi at gmail.com  Thu May 15 09:51:38 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 06:51:38 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
Message-ID: <46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>

On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > i currently have locations of the mp3s in question as strings, which
> > works for parsing local files, but gives me a "No such file or
> > directory" error when it tries to process URLs. ?it seems terribly
> > inefficient to download each mp3 just to get at that small tag data,
> > and i assume there's a way to do this with file() or open() or
> > something, i just can't get it to work.
>
> You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> with ID3 V1 tags you'll have to download the file anyway because those are
> in the last 128 bytes of an MP3 file.
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch

Just don't import time.  What would you do with an autolocking timer,
such as time.sleep( ) on a thread?  I am tongue tied in the presence
of a lady.


From sjmachin at lexicon.net  Sat May 24 09:29:58 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 13:29:58 GMT
Subject: SQLite import fails sometimes ?
In-Reply-To: <mailman.1523.1211631350.12834.python-list@python.org>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>
	<mailman.1523.1211631350.12834.python-list@python.org>
Message-ID: <48381851$1@news.mel.dft.com.au>

Stef Mientki wrote:

> I don't know if this matters, but I also use sqlite3 from other than 
> Python programs.

You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
Python, and (I guess) you have another instance of sqlite3.dll somewhere 
else, for use "from other than Python programs". Are they the same 
version? If not, this may be the problem. Start up your other 
application, then try to import sqlite3 from Python. If this is the 
problem, and you must be able to run both apps simultaneously, you will 
probably need to update one or the other.

Cheers,
John


From mde at MicahElliott.com  Tue May  6 19:00:13 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Tue, 06 May 2008 16:00:13 -0700
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <20080506230013.GE6567@micahelliott.com>

On 2008-05-06 Michael Robertson wrote:

> I'm having trouble opening a file in linux, whose path has
> spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
> >>> open('./my test/test.txt')
> Exception

That's funny.  These exact steps work fine for me on Linux, with
Python 2.5.2, and even 1.5.2.

Does 'os.path.normpath' have anything interesting to say about
what you're passing it?

> but yet...
>
> >>> import os
> >>> os.chdir('./my test')
> >>> open('./test')
>
> works just fine.

How doctored up is this example?  In the above ./test should not
actually exist.  Did the chdir actually work?  Or did you remove
the .txt?

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:51:12 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:51:12 -0400
Subject: can't delete from a dictionary in a loop
In-Reply-To: <43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>
Message-ID: <AknXj.46809$3v1.1644@bignews3.bellsouth.net>

bruno.desthuilliers at gmail.com wrote:
> On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>
>>
>>> Dan Upton wrote:
>>>> for pid in procs_dict:
> (snip)
>>>    for pid in procs_dict.keys():
>> I'm afraid this will do the same exact thing. A for loop on a dict
>> iterates over the dict keys, so both statements are strictly
>> equivalent from a practical POV.
> 
> Hem. Forget it. I should think twice before posting - this will
> obviously make a big difference here.  Sorry for the noise.

:-)  It appears that you would be right if this was Python 3.0, though:

Python 3.0a5 (r30a5:62856, May 16 2008, 11:43:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> d = {1: 2, 3: 4, 5: 6}
 >>> for i in d.keys(): del d[i]
...
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
RuntimeError: dictionary changed size during iteration

Maybe 'for i in d' and 'for i in d.keys()' *are* functionally equivalent in 3.0, 
as d.keys() returns an object that iterates over d's keys... but I haven't read 
enough about it yet to be sure.  In any case, the problem goes away when we 
force a list:

 >>> d = {1: 2, 3: 4, 5: 6}
 >>> for i in list(d.keys()): del d[i]
...
 >>> d
{}

--Hans


From jenn.duerr at gmail.com  Tue May 13 15:02:29 2008
From: jenn.duerr at gmail.com (Jennifer Duerr)
Date: Tue, 13 May 2008 12:02:29 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
Message-ID: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>

All,

I need help concerning SOAP, Python and XML. I am very new to this, so
dumbing it down for me will not offend me!

I'm using Python and want to send a user-inputted string to an
existing Java web app that
will output results to XML. I need to capture elements of the XML and
put
the info into a table. (say I send a single/simple address string to
this
webservice/geocode, which then returns numerous possible matches with
XY
values and score values, and I want to capture that into a table)

How do I go about doing this? I'm told I need to use SOAP. I
discovered that
the best module to use is ZSI (please correct me if I'm wrong). I have
installed the necessary module. Examples I have seen are plenty and
all so different, its not clear to me how to go about.  I have been
spinning my wheels for too long on this!

Can someone provide some example code similar to what I need to do? Or
any
guidance would be appreciated.

Thanks!


From ladynikon at gmail.com  Thu May  1 14:39:47 2008
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Thu, 1 May 2008 14:39:47 -0400
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
In-Reply-To: <72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>
References: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>
	<72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>
Message-ID: <59f9c5160805011139g47089eaah95f4281e6036f00@mail.gmail.com>

<3 BAHAHAHAA


From pm604407 at gmail.com  Sat May 31 00:49:07 2008
From: pm604407 at gmail.com (meg)
Date: Fri, 30 May 2008 21:49:07 -0700 (PDT)
Subject: TRISHA FILM ACTRESS
Message-ID: <12acbb43-d107-47ff-869a-a161af8bd59f@w34g2000prm.googlegroups.com>

http://trishafilmactress.blogspot.com/2008/05/modern-trisha.html


From robin at NOSPAMreportlab.com  Tue May 20 16:51:33 2008
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Tue, 20 May 2008 21:51:33 +0100
Subject: Report Lab Image Flowable Issue ..
In-Reply-To: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>
References: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>
Message-ID: <483339D5.5000308@jessikat.plus.net>

dbee wrote:
> I'm try to generate a report that will span multiple pages and have
> dynamic content using python reportlab. I have no issues with regards
> to generating images and then using     p.drawInlineImage(signup_img,
> 100,150)  to draw them onto the canvas.
> 
> The problem that i have comes when i try to create flowables so that
> my layout can span multiple pages. The images themselves never
> actually show up on the page ...
......

I think you should ask this on the reportlab users list which you can 
find at http://two.pairlist.net/pipermail/reportlab-users/

As for your specific problem perhaps you should start with some simple 
examples.
-- 
Robin Becker


From niklas.norrthon at hotmail.com  Fri May  9 06:46:49 2008
From: niklas.norrthon at hotmail.com (Niklas Norrthon)
Date: Fri, 9 May 2008 03:46:49 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>

On 9 Maj, 12:30, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??

There is a distribution of PythonWin bundled with the
ArcGIS Desktop installation media, but it is not
installed by the ArcGIS installer.

You have three options:
1. Install it manually from the ArcGIS installation
media.
2. Find it on the web (google for it), download and
install.
3. (My recommendation) Don't bother. IDLE is pretty
good. Emacs even better (unless you hate emacs).

--
Niklas Norrthon
ESRI S-GROUP


From dullrich at sprynet.com  Wed May 14 16:37:50 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 15:37:50 -0500
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <dullrich-A8B0BE.15375014052008@text.giganews.com>

In article 
<a14c2400-e88b-4d90-80bb-a5fe27fedea3 at m44g2000hsc.googlegroups.com>,
 Iain King <iainking at gmail.com> wrote:

> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.
> 
> dlg.ShowModal()
> onBrowse()
> 
> obviously doesn't work, and neither does the reverse.  I was hoping
> that the dialog would throw some kind of "I have been shown" event,
> but it doesn't (as far as I can tell).  How do I make the dialog do
> something as soon as it's been shown?

It's too bad that you found an answer. You _shouldn't_ have your
dialog pop up a file-selection box as soon as it's shown! That's
not the way dialogs usually work, so you're going to confuse
people.

Instead, first pop up the file-selection box, and then pop up
the dialog (without the Browse button) to do whatever else it
does after you've got the filename.

> Iain


From aisaac at american.edu  Sun May 11 00:08:38 2008
From: aisaac at american.edu (Alan Isaac)
Date: Sun, 11 May 2008 04:08:38 GMT
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <mailman.871.1210342518.12834.python-list@python.org>
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
	<mailman.871.1210342518.12834.python-list@python.org>
Message-ID: <ajuVj.23627$5Y1.15331@trnddc04>

J. Cliff Dyer wrote:

> looks like a good approach to me



OK, thanks.

Another approach is to begin with a set of stocks

and remove them as they report.  You can then trigger

a report with the empty set instead of repeatedly

calling ``all``. After a report the set can be

"refilled".



Cheers,

Alan Isaac




From gherron at islandtraining.com  Wed May 28 12:19:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 28 May 2008 09:19:32 -0700
Subject: Any way to loop through object variables?
In-Reply-To: <483D7A47.3030606@ecs.soton.ac.uk>
References: <483D7A47.3030606@ecs.soton.ac.uk>
Message-ID: <483D8614.7000808@islandtraining.com>

Dave Challis wrote:
> Hi,
> Just wondering if there's a way to iterate through all variables which
> an object has set?
>
> Specifically, I'm using the OptionParser module, which returns an
> options object, containing all command line options as object variables.
>  I'd like to iterate over these rather than getting at them by name.
>
> Cheers,
> Dave

For this object (and many others), you can get at the attributes with 
the vars(...) builtin. 

It returns a dictionary of attribute names and values.

Gary Herron


--
http://mail.python.org/mailman/listinfo/python-list




From inhahe at gmail.com  Fri May 16 14:12:47 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 14:12:47 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
Message-ID: <28kXj.142759$Er2.39732@bignews6.bellsouth.net>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go 
> out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's 
> just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > I have a proposition to ask you all: Python emphasizes state. Is it
> > true?

Please don't feed the bots.

--


I figured the question was interesting enough to warrant discussion whether 
it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.

Also, if it's a bot I'm floored and the man who wrote it could probably 
solve cancer and world hunger with five lines of asm.





From castironpi at gmail.com  Wed May  7 05:59:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 02:59:53 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>
Message-ID: <a5bbbf8f-73e5-4907-b470-a805e20d33d9@l64g2000hse.googlegroups.com>

On May 7, 1:40?am, Jetus <stevegi... at gmail.com> wrote:
> On May 4, 7:22 am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
>
> > > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > > > Is there a good place to look to see where I can find some code that
> > > > will help me to save webpage's links to the local drive, after I have
> > > > used urllib2 to retrieve the page?
> > > > Many times I have to view these pages when I do not have access to the
> > > > internet.
>
> > > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> > > --
> > > Gabriel Genellina
>
> > A lot of the functionality is already present.
>
> > import urllib
> > urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> > from htmllib import HTMLParser
> > from formatter import NullFormatter
> > parser= HTMLParser( NullFormatter( ) )
> > parser.feed( open( 'main.htm' ).read( ) )
> > import urlparse
> > for a in parser.anchorlist:
> > ? ? print urlparse.urljoin( 'http://python.org/', a )
>
> > Output snipped:
>
> > ...http://python.org/psf/http://python.org/dev/http://python.org/links/h...
> > ...
>
> How can I modify or add to the above code, so that the file references
> are saved to specified local directories, AND the saved webpage makes
> reference to the new saved files in the respective directories?
> Thanks for your help in advance.- Hide quoted text -
>
> - Show quoted text -

You'd have to convert filenames in the loop to a file system path; try
writing as is with makedirs( ).  You'd have to replace contents in a
file for links, so your best might be prefixing them with localhost
and spawning a small bounce-router.


From banibrata.dutta at gmail.com  Fri May  9 09:17:27 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 18:47:27 +0530
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>
References: <mailman.785.1210261857.12834.python-list@python.org>
	<3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>
	<383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805090617g4f51d40fo57965ae293562979@mail.gmail.com>

Any chance that there is a "catch-all" in the code.
As per PEP8 and I'm sure common knowledge of all the folks programming in
Python for a while -- a
>>>catch:
could just lead to this problem.


On 5/9/08, Floris Bruynooghe <floris.bruynooghe at gmail.com> wrote:
>
> On May 9, 11:19 am, spectru... at gmail.com wrote:
> > Thanks for the replies.
> >
> > On May 8, 5:50 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >
> > > Ctrl+C often works with Python, but as with any language, it's possible
> > > to write a program which will not respond to it.  You can use Ctrl+\
> > > instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> > > Ctrl+\ sends SIGQUIT which typically isn't)
> >
> > Yes, thank you, this seems to work. :)
> >
> > I did some more testing and found out that the problem seems to be
> > thread-related. If I have a single-threaded program, then Ctrl+C
> > usually works, but if I have threads, it is usually ignored. For
> > instance, the below program does not respond to Ctrl+C (but it does
> > die when issued Ctrl+\):
> >
> > import threading
> >
> > def loop():
> >   while True:
> >     pass
> >
> > threading.Thread(target=loop,args=()).start()
>
> Your thread needs to be daemonised for this work.  Othewise your main
> thread will be waiting for your created thread to finish.  E.g.:
>
> thread = threading.Thread(target=loop)
> thread.setDaemon(True)
> thread.start()
>
> But now it will exit immediately as soon as your main thread has
> nothing to do anymore (which is right after .start() in this case), so
> plug in another infinite loop at the end of this:
>
> while True:
>    time.sleep(10)
>
> And now your threaded app will stop when using C-c.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From alangrow at gmail.com  Sat May 17 16:14:50 2008
From: alangrow at gmail.com (alan grow)
Date: Sat, 17 May 2008 15:14:50 -0500
Subject: waiting on an event blocks all signals
In-Reply-To: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
	<4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
Message-ID: <f39e8ddc0805171314y7975fd68rd4f0539a4f28f10@mail.gmail.com>

On Sat, May 17, 2008 at 2:49 PM, John Schroeder <jschroed at gmail.com> wrote:
> ^C only kills the main thread.  Use Control-Break to kill all threads.
>>
>> python -c "import threading; threading.Event().wait()"
>> ^C^C^C^C

There's a single main thread here though. Or am I missing something?


From eliben at gmail.com  Sun May 25 11:40:26 2008
From: eliben at gmail.com (eliben)
Date: Sun, 25 May 2008 08:40:26 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
Message-ID: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>

Hello,

I have a small wxPython application. Today I was trying to add some
RPC capability to it, so I implemented an instance of
SimpleXMLRPCServer that runs in a separate thread when invoked and
answers requests.

All went fine until I realized that I have to sometimes stop the
server - which is where I ran into a problem. Python threads can not
be killed after they've been started. They can be kindly requested to
end, but it's up to the thread itself to decide when it wants to
finish. At least this is my understanding. It probably makes sense,
because threads can hold resources which can't just be dropped
suddenly, and have to be cleaned in a proper manner. (Does this sound
like the truth ?)

Anyway, this creates a problem because SimpleXMLRPCServer likes to
block and never return. I dug deeper and found out that all offspring
of SocketServer can only handle requests in a blocking manner. Even if
you call handle_request( ) and not serve_forever(), it will block
until a request is received and handled. This means that a
SocketServer object running in a thread blocks the thread, and this
thread can not be stopped.

Is there any graceful solution to this problem ?

I suppose I can use sockets in non-blocking mode, or use select(), but
this will mean I will have to implement my server with raw sockets and
not a handy helper like SocketServer. For the XML-RPC server I want
this is a headache, as I will probably have to implement my own XML-
RPC server based on raw non-blocking sockets.

Thanks in advance for any ideas and suggestions
Eli


From maxm at mxm.dk  Tue May  6 16:06:23 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 06 May 2008 22:06:23 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <m28wyn78oe.fsf@googlemail.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<m28wyn78oe.fsf@googlemail.com>
Message-ID: <fvqdnv$a4f$1@ger.gmane.org>

Arnaud Delobelle skrev:
> jmDesktop <needin4mation at gmail.com> writes:
> 
>> Studying OOP and noticed that Python does not have Interfaces.  Is
>> that correct?  Is my schooling for nought on these OOP concepts if I
>> use Python.  Am I losing something if I don't use the "typical" oop
>> constructs found in other languages (Java, C# come to mind.)  I'm
>> afraid that if I never use them I'll lose them and when I need them
>> for something beside Python, I'll be lost.  Thank you.
> 
> You're not missing anything.  An Interface is the Poor Man's Multiple
> Inheritance.  But in truth, even without multiple inheritance, Python
> wouldn't need java-like interfaces.


Interfaces are a great concept for many things, and they can cover a few 
soft spots in Python.

There is the possibility of using the great zope.interface library 
http://pypi.python.org/pypi/zope.interface. Just use:

"easy_install zope.interface"

And you have interfaces.



-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From kyosohma at gmail.com  Fri May  2 13:43:57 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 10:43:57 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
	<8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
Message-ID: <f05abe25-b0e1-4c91-840a-840844c4c050@t54g2000hsg.googlegroups.com>

On May 2, 12:03 pm, globalrev <skanem... at yahoo.se> wrote:
> print pygame.K_a displays 97 btw. what does that mean? i though it
> would return true or false or 0 or 1.

That's probably the key code value. Or the ASCII representation for
the key. You'd have to read the pygame docs to really know.

Mike


From celoserpa at gmail.com  Thu May 15 13:21:34 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 14:21:34 -0300
Subject: Handling test data that depends on temporal data (that might change
	while the test runs)
Message-ID: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>

Hello,

So, I have this particular method, generate_chat_dir_string, which should
generate a string in the following format:
 "md5hexstring-day-month-year-hour-minute"

This string will be used to create a directory in the filesystem.

I'm trying to adopt the TDD approach, so, I'm starting by testing all the
methods of the Chat class, including this one. However, an issue just popped
up, this is the test code:


   1.   def test_generate_chat_dir_string(self):
   2.         import md5
   3.         import random
   4.         import datetime
   5.         md5_handler = md5.new()
   6.         users = [{"user":"pedro","atendente":False},{
   "user":"jo?o","atendente":True}]
   7.         #salt = random.random().to_s()
   8.         #md5_handler.update(salt)
   9.         now = datetime.datetime.now()
   10.         ts = now.strftime("%d-%m-%Y-%H-%M")
   11.         for user in users:
   12.             md5_handler.update(user["user"])
   13.
   14.
   15.         seed = md5_handler.hexdigest()
   16.
   17.         final_string = seed + "-" + ts
   18.
   19.         method_generated_string = self.chat.generated_chat_dir_string
   (users,seed)
   20.
   21.         self.assertEquals(final_string,method_generated_string)

As you can see, it generates a specific set of data and assembles a
final_string. It then feeds the same data to generate_chat_dir_string and
compare to see if the final_string is equal to the string generated by the
tested method.

However, they might not be equal becouse of the temporal data. In this case
I'm not using seconds, but in a bizarre situation a minute could have passed
and the test would faile becouse the two strings would have a different
minute portion. Something like this:

"b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
"b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"

How could I handle this issue?

Thanks in advance,

Marcelo.
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From aahz at pythoncraft.com  Sat May  3 15:55:04 2008
From: aahz at pythoncraft.com (Aahz)
Date: 3 May 2008 12:55:04 -0700
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org>
	<481B27D9.3000107@behnel.de>
	<eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>
	<286490d5-01ce-40c5-8965-9e3da4fea1c9@w74g2000hsh.googlegroups.com>
Message-ID: <fvifuo$8dp$1@panix3.panix.com>

In article <286490d5-01ce-40c5-8965-9e3da4fea1c9 at w74g2000hsh.googlegroups.com>,
Jeff  <jeffober at gmail.com> wrote:
>
>Use lisp?

:-)))))))
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From gagsl-py2 at yahoo.com.ar  Sat May 24 21:36:58 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 22:36:58 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
Message-ID: <op.ubor3wt2x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>
>> Not to say that your concerns are pointless, and that things cannot be
>> improved somehow, but this is not that trivial, and there may be
>> ambuiguities in some not so rare cases.
>
> It might be worth considering an alternative approach here: a formatted
> exception includes the relevant source lines (where possible).

Just to note that the standard cgitb module already does that, among other things.

-- 
Gabriel Genellina



From mensanator at aol.com  Sat May 17 01:08:56 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 16 May 2008 22:08:56 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
Message-ID: <92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com>

On May 16, 11:43?pm, Sanoski <Joshuajr... at gmail.com> wrote:
> I'm pretty new to programming. I've just been studying a few weeks off
> and on. I know a little, and I'm learning as I go. Programming is so
> much fun! I really wish I would have gotten into it years ago, but
> here's my question. I have a longterm project in mind, and I wont to
> know if it's feasible and how difficult it will be.
>
> There's an XML feed for my school that some other class designed. It's
> just a simple idea that lists all classes, room number, and the person
> with the highest GPA. The feed is set up like this. Each one of the
> following lines would also be a link to more information about the
> class, etc.
>
> Economics, Room 216, James Faker, 3.4
> Social Studies, Room 231, Brain Fictitious, 3.5
>
> etc, etc
>
> The student also has a picture reference that depicts his GPA based on
> the number. The picture is basically just a graph. I just want to
> write a program that uses the information on this feed.
>
> I want it to reach out to this XML feed, record each instance of the
> above format along with the picture reference of the highest GPA
> student, download it locally, and then be able to use that information
> in various was. I figured I'll start by counting each instance. For
> example, the above would be 2 instances.
>
> Eventually, I want it to be able to cross reference data you've
> already downloaded, and be able to compare GPA's, etc. It would have a
> GUI and everything too, but I am trying to keep it simple right now,
> and just build onto it as I learn.
>
> So lets just say this. How do you grab information from the web,

Depends on the web page.

> in this case a feed,

Haven't tried that, just a simple CGI.

> and then use that in calculations?

The key is some type of structure be it database records,
or a list of lists or whatever. Something that you can iterate
through, sort, find max element, etc.

> How would you
> implement such a project?

The example below uses BeautifulSoup. I'm posting it not
because it matches your problem, but to give you an idea of
the techniques involved.

> Would you save the information into a text file?

Possibly, but generally no. Text files aren't very useful
except as a data exchange media.

> Or would you use something else?

Your application lends itself to a database approach.
Note in my example the database part of the code is disabled.
Not every one has MS-Access on Windows.

> Should I study up on SQLite?

Yes. The MS-Access code I have can be easily changed to SQLlite.

> Maybe I should study classes.

I don't know, but I've always gotten along without them.

> I'm just not sure. What would be the most effective technique?

Don't know that either as I've only done it once, as follows:

##  I was looking in my database of movie grosses I regulary copy
##  from the Internet Movie Database and noticed I was _only_ 120
##  weeks behind in my updates.
##
##  Ouch.
##
##  Copying a web page, pasting into a text file, running a perl
##  script to convert it into a csv file and manually importing it
##  into Access isn't so bad when you only have a couple to do at
##  a time. Still, it's a labor intensive process and 120 isn't
##  anything to look forwards to.
##
##  But I abandoned perl years ago when I took up Python, so I
##  can use Python to completely automate the process now.
##
##  Just have to figure out how.
##
##  There's 3 main tasks: capture the web page, parse the web page
##  to extract the data and insert the data into the database.
##
##  But I only know how to do the last step, using the odnc tools
##  from win32,

####import dbi
####import odbc
import re

##  so I snoop around comp.lang.python to pick up some
##  hints and keywords on how to do the other two tasks.
##
##  Documentation on urllib2 was a bit vague, but got the web page
##  after only a ouple mis-steps.

import urllib2

##  Unfortunately, HTMLParser remained beyond my grasp (is it
##  my imagination or is the quality of the examples in the
##  doumentation inversely proportional to the subject
##  difficulty?)
##
##  Luckily, my bag of hints had a reference to Beautiful Soup,
##  whose web site proclaims:
##      Beautiful Soup is a Python HTML/XML parser
##      designed for quick turnaround projects like
##      screen-scraping.
##  Looks like just what I need, maybe I can figure it out after all.

from BeautifulSoup import BeautifulSoup

target_dates = [['4','6','2008','April']]

####con = odbc.odbc("IMDB")  # connect to MS-Access database
####cursor = con.cursor()

for d in target_dates:
  #
  # build url (with CGI parameters) from list of dates needing
updating
  #
  the_year = d[2]
  the_date = '/'.join([d[0],d[1],d[2]])
  print '%10s scraping IMDB:'  % (the_date),
  the_url = ''.join([r'http://www.imdb.com/BusinessThisDay?
day=',d[1],'&month=',d[3]])
  req = urllib2.Request(url=the_url)
  f = urllib2.urlopen(req)
  www = f.read()
  #
  # ok, page captured. now make a BeatifulSoup object from it
  #
  soup = BeautifulSoup(www)
  #
  # that was easy, much more so than HTMLParser
  #
  # now, _all_ I have to do is figure out how to parse it
  #
  # ouch again. this is a lot harder than it looks in the
  # documentation. I need to get the data from cells of a
  # table nested inside another table and that's hard to
  # extrapolate from the examples showing how to find all
  # the comments on a web page.
  #
  # but this looks promising. if I grab all the table rows
  # (tr tags), each complete nested table is inside a cell
  # of the outer table (whose table tags are lost, but aren't
  # needed and whose absence makes extracting the nested
  # tables easier (when you do it the stupid way, but hey,
  # it works, so I'm sticking with it))
  #
  tr = soup.tr                          # table rows
  tr.extract()
  #
  # now, I only want the third nested table. how do I get it?
  # can't seem to get past the first one, should I be using
  # NextSibling or something? <scratches head...>
  #
  # but wait...I don't need the first two tables, so I can
  # simply extract and discard them. and since .extract()
  # CUTS the tables, after two extractions the table I want
  # IS the first one.
  #
  the_table = tr.find('table')          # discard
  the_table.extract()
  the_table = tr.find('table')          # discard
  the_table.extract()
  the_table = tr.find('table')          # weekly gross
  the_table.extract()
  #
  # of course, the data doesn't start in the first row,
  # there's formatting, header rows, etc. looks like it starts
  # in tr number [3]
  #
  ##  >>> the_table.contents[3].td
  ##  <td><a href="/title/tt0170016/">How the Grinch Stole Christmas
(2000)</a> </td>
  #
  # and since tags always imply the first one, the above
  # is equivalent to
  #
  ##  >>> the_table.contents[3].contents[0]
  ##  <td><a href="/title/tt0170016/">How the Grinch Stole Christmas
(2000)</a> </td>
  #
  # and since the title is the first of three cells, the
  # reporting year is
  #
  ##  >>> the_table.contents[3].contents[1]
  ##  <td> <a href="/Sections/Years/2001">2001</a> </td>
  #
  # finally, the 3rd cell must contain the gross
  #
  ##  >>> the_table.contents[3].contents[2]
  ##  <td align="RIGHT"> 259,674,120</td>
  #
  # but the contents of the first two cells are anchor tags.
  # to get the actual title string, I need the contents of the
  # contents. but that's not exactly what I want either,
  # I don't want a list, I need a string. and the string isn't
  # always in the same place in the list
  #
  # summarizing, what I need is
  #
  ##  print the_table.contents[3].contents[0].contents[0].contents,
  ##  print the_table.contents[3].contents[1].contents[1].contents,
  ##  print the_table.contents[3].contents[2].contents
  #
  # and that almost works, just a couple more tweaks and I can
  # shove it into the database

  parsed = []

  for rec in the_table.contents[3:]:
    the_rec_type = type(rec)                      # some rec are
NavSrings, skip
    if str(the_rec_type) == "<type 'instance'>":
      #
      # ok, got a real data row
      #
      TITLE_DATE = rec.contents[0].contents[0].contents   # a list
inside a tuple
      #
      # and that means we still have to index the contents
      # of the contents of the contents of the contents by
      # adding [0][0] to TITLE_DATE
      #
      YEAR =  rec.contents[1].contents[1].contents        # ditto
      #
      # this won't go into the database, just used as a filter to grab
      # the records associated with the posting date and discard
      # the others (which should already be in the database)
      #
      GROSS = rec.contents[2].contents                    # just a
list
      #
      # one other minor glitch, that film date is part of the title
      # (which is of no use in the database, so it has to be pulled
out
      # and put in a separate field
      #
#      temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
(.*)',str(TITLE_DATE[0][0]))
      temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
(.*)',str(TITLE_DATE))
      #
      # which works 99% of the time. unfortunately, the IMDB
      # consitency is somewhat dubious. the date is _supposed_
      # to be at the end of the string, but sometimes it's not.
      # so, usually, there are only 5 groups, but you have to
      # allow for the fact that there may be 6
      #
      try:
        the_title = temp_title.group(1) + temp_title.group(5)
      except:
        the_title = temp_title.group(1)
      the_gross = str(GROSS[0])
      #
      # and for some unexplained reason, dates will occasionally
      # be 2001/I instead of 2001, so we want to discard the trailing
      # crap, if any
      #
      the_film_year = temp_title.group(3)[:4]
#      if str(YEAR[0][0])==the_year:
      if str(YEAR[0])==the_year:
        parsed.append([the_date,the_title,the_film_year,the_gross])

  print '%3d records found ' % (len(parsed))
  #
  # wow, now just have to insert all the update records directly
  # into the database...into a temporary table, of course. as I said,
  # IMDB consistency is somewhat dubious (such as changing the
spelling
  # of the titles), so a QC check will be required inside Access
  #
####  if len(parsed)>0:
####    print '...inserting into database'
####    for p in parsed:
####      cursor.execute("""
####INSERT INTO imdweeks2 ( Date_reported, Title, Film_Date,
Gross_to_Date )
####SELECT ?,?,?,?;""",p)
####  else:
####    print '...aborting, no records found'
####
####cursor.close()
####con.close()

  for p in parsed: print p

# and just because it works, doesn't mean it's right.
# but hey, you get what you pay for. I'm _sure_ if I were
# to pay for a subscription to IMDBPro, I wouldn't see
# these errors ;-)



##You should get this:
##
##  4/6/2008 scraping IMDB: 111 records found
##['4/6/2008', "[u'I Am Legend']", '2007', ' 256,386,216']
##['4/6/2008', "[u'National Treasure: Book of Secrets']", '2007', '
218,701,477']
##['4/6/2008', "[u'Alvin and the Chipmunks']", '2007', ' 216,873,487']
##['4/6/2008', "[u'Juno']", '2007', ' 142,545,706']
##['4/6/2008', "[u'Horton Hears a Who!']", '2008', ' 131,076,768']
##['4/6/2008', "[u'Bucket List, The']", '2007', ' 91,742,612']
##['4/6/2008', "[u'10,000 BC']", '2008', ' 89,349,915']
##['4/6/2008', "[u'Cloverfield']", '2008', ' 80,034,302']
##['4/6/2008', "[u'Jumper']", '2008', ' 78,762,148']
##['4/6/2008', "[u'27 Dresses']", '2008', ' 76,376,607']
##['4/6/2008', "[u'No Country for Old Men']", '2007', ' 74,273,505']
##['4/6/2008', "[u'Vantage Point']", '2008', ' 71,037,105']
##['4/6/2008', "[u'Spiderwick Chronicles, The']", '2008', '
69,872,230']
##['4/6/2008', '[u"Fool\'s Gold"]', '2008', ' 68,636,484']
##['4/6/2008', "[u'Hannah Montana/Miley Cyrus: Best of Both Worlds
Concert Tour']", '2008', ' 65,010,561']
##['4/6/2008', "[u'Step Up 2: The Streets']", '2008', ' 57,389,556']
##['4/6/2008', "[u'Atonement']", '2007', ' 50,921,738']
##['4/6/2008', "[u'21']", '2008', ' 46,770,173']
##['4/6/2008', "[u'College Road Trip']", '2008', ' 40,918,686']
##['4/6/2008', "[u'There Will Be Blood']", '2007', ' 40,133,435']
##['4/6/2008', "[u'Meet the Spartans']", '2008', ' 38,185,300']
##['4/6/2008', "[u'Meet the Browns']", '2008', ' 37,662,502']
##['4/6/2008', "[u'Deep Sea 3D']", '2006', ' 36,141,373']
##['4/6/2008', "[u'Semi-Pro']", '2008', ' 33,289,722']
##['4/6/2008', "[u'Definitely, Maybe']", '2008', ' 31,973,840']
##['4/6/2008', "[u'Eye, The']", '2008', ' 31,397,498']
##['4/6/2008', "[u'Great Debaters, The']", '2007', ' 30,219,326']
##['4/6/2008', "[u'Bank Job, The']", '2008', ' 26,804,821']
##['4/6/2008', "[u'Other Boleyn Girl, The']", '2008', ' 26,051,195']
##['4/6/2008', "[u'Drillbit Taylor']", '2008', ' 25,490,483']
##['4/6/2008', "[u'Magnificent Desolation: Walking on the Moon 3D']",
'2005', ' 23,283,158']
##['4/6/2008', "[u'Shutter']", '2008', ' 23,138,277']
##['4/6/2008', "[u'Never Back Down']", '2008', ' 23,080,675']
##['4/6/2008', "[u'Mad Money']", '2008', ' 20,648,442']
##['4/6/2008', "[u'Galapagos']", '1955', ' 17,152,405']
##['4/6/2008', "[u'Superhero Movie']", '2008', ' 16,899,661']
##['4/6/2008', "[u'Wild Safari 3D']", '2005', ' 16,550,933']
##['4/6/2008', "[u'Kite Runner, The']", '2007', ' 15,790,223']
##['4/6/2008', '[u"Nim\'s Island"]', '2008', ' 13,210,579']
##['4/6/2008', "[u'Leatherheads']", '2008', ' 12,682,595']
##['4/6/2008', "[u'Be Kind Rewind']", '2008', ' 11,028,439']
##['4/6/2008', "[u'Doomsday']", '2008', ' 10,955,425']
##['4/6/2008', "[u'Sea Monsters: A Prehistoric Adventure']", '2007', '
10,745,308']
##['4/6/2008', "[u'Miss Pettigrew Lives for a Day']", '2008', '
10,534,800']
##['4/6/2008', "[u'M&#244;me, La']", '2007', ' 10,299,782']
##['4/6/2008', "[u'Penelope']", '2006', ' 9,646,154']
##['4/6/2008', "[u'Misma luna, La']", '2007', ' 8,959,462']
##['4/6/2008', "[u'Roving Mars']", '2006', ' 8,463,161']
##['4/6/2008', "[u'Stop-Loss']", '2008', ' 8,170,755']
##['4/6/2008', "[u'Ruins, The']", '2008', ' 8,003,241']
##['4/6/2008', "[u'Bella']", '2006', ' 7,776,080']
##['4/6/2008', "[u'U2 3D']", '2007', ' 7,348,105']
##['4/6/2008', "[u'Orfanato, El']", '2007', ' 7,159,147']
##['4/6/2008', "[u'In Bruges']", '2008', ' 6,831,761']
##['4/6/2008', "[u'Savages, The']", '2007', ' 6,571,599']
##['4/6/2008', "[u'Scaphandre et le papillon, Le']", '2007', '
5,990,075']
##['4/6/2008', "[u'Run Fatboy Run']", '2007', ' 4,430,583']
##['4/6/2008', "[u'Persepolis']", '2007', ' 4,200,980']
##['4/6/2008', "[u'Charlie Bartlett']", '2007', ' 3,928,412']
##['4/6/2008', "[u'Jodhaa Akbar']", '2008', ' 3,434,629']
##['4/6/2008', "[u'F&#228;lscher, Die']", '2007', ' 2,903,370']
##['4/6/2008', "[u'Bikur Ha-Tizmoret']", '2007', ' 2,459,543']
##['4/6/2008', "[u'Shine a Light']", '2008', ' 1,488,081']
##['4/6/2008', "[u'Race']", '2008', ' 1,327,606']
##['4/6/2008', "[u'Funny Games U.S.']", '2007', ' 1,274,055']
##['4/6/2008', "[u'4 luni, 3 saptam&#226;ni si 2 zile']", '2007', '
1,103,315']
##['4/6/2008', "[u'Married Life']", '2007', ' 1,002,318']
##['4/6/2008', "[u'Diary of the Dead']", '2007', ' 893,192']
##['4/6/2008', "[u'Starting Out in the Evening']", '2007', ' 882,518']
##['4/6/2008', "[u'Dolphins and Whales 3D: Tribes of the Ocean']",
'2008', ' 854,304']
##['4/6/2008', "[u'Sukkar banat']", '2007', ' 781,954']
##['4/6/2008', "[u'Bonneville']", '2006', ' 471,679']
##['4/6/2008', "[u'Flawless']", '2007', ' 390,892']
##['4/6/2008', "[u'Paranoid Park']", '2007', ' 387,119']
##['4/6/2008', "[u'Teeth']", '2007', ' 321,732']
##['4/6/2008', "[u'Hammer, The']", '2007', ' 321,579']
##['4/6/2008', "[u'Priceless']", '2008', ' 320,131']
##['4/6/2008', "[u'Steep']", '2007', ' 259,840']
##['4/6/2008', "[u'Honeydripper']", '2007', ' 259,192']
##['4/6/2008', "[u'Snow Angels']", '2007', ' 255,147']
##['4/6/2008', "[u'Taxi to the Dark Side']", '2007', ' 231,743']
##['4/6/2008', "[u'Cheung Gong 7 hou']", '2008', ' 188,067']
##['4/6/2008', "[u'Ne touchez pas la hache']", '2007', ' 184,513']
##['4/6/2008', "[u'Sleepwalking']", '2008', ' 160,715']
##['4/6/2008', "[u'Chicago 10']", '2007', ' 149,456']
##['4/6/2008', "[u'Girls Rock!']", '2007', ' 92,636']
##['4/6/2008', "[u'Beaufort']", '2007', ' 87,339']
##['4/6/2008', "[u'Shelter']", '2007', ' 85,928']
##['4/6/2008', "[u'My Blueberry Nights']", '2007', ' 74,146']
##['4/6/2008', "[u'T&#233;moins, Les']", '2007', ' 71,624']
##['4/6/2008', "[u'M&#233;pris, Le']", '1963', ' 70,761']
##['4/6/2008', "[u'Singing Revolution, The']", '2006', ' 66,482']
##['4/6/2008', "[u'Chop Shop']", '2007', ' 58,858']
##['4/6/2008', '[u"Chansons d\'amour, Les"]', '2007', ' 58,577']
##['4/6/2008', "[u'Praying with Lior']", '2007', ' 57,325']
##['4/6/2008', "[u'Yihe yuan']", '2006', ' 57,155']
##['4/6/2008', "[u'Casa de Alice, A']", '2007', ' 53,700']
##['4/6/2008', "[u'Blindsight']", '2006', ' 51,256']
##['4/6/2008', "[u'Boarding Gate']", '2007', ' 37,107']
##['4/6/2008', "[u'Voyage du ballon rouge, Le']", '2007', ' 35,222']
##['4/6/2008', "[u'Bill']", '2007', ' 35,201']
##['4/6/2008', "[u'Mio fratello &#232; figlio unico']", '2007', '
34,138']
##['4/6/2008', "[u'Chapter 27']", '2007', ' 32,602']
##['4/6/2008', "[u'Meduzot']", '2007', ' 25,352']
##['4/6/2008', "[u'Shotgun Stories']", '2007', ' 25,346']
##['4/6/2008', "[u'Sconosciuta, La']", '2006', ' 18,569']
##['4/6/2008', "[u'Imaginary Witness: Hollywood and the Holocaust']",
'2004', ' 18,475']
##['4/6/2008', "[u'Irina Palm']", '2007', ' 14,214']
##['4/6/2008', "[u'Naissance des pieuvres']", '2007', ' 7,418']
##['4/6/2008', "[u'Four Letter Word, A']", '2007', ' 6,017']
##['4/6/2008', "[u'Tuya de hun shi']", '2006', ' 2,619']



From skanemupp at yahoo.se  Sat May 31 10:01:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 31 May 2008 07:01:58 -0700 (PDT)
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
Message-ID: <2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>

On 31 Maj, 14:48, globalrev <skanem... at yahoo.se> wrote:
> On 31 Maj, 04:04, John Henderson <jhenRemoveT... at talk21.com> wrote:
>
>
>
> > globalrev wrote:
> > > can i send and receive messages from a website using python?
>
> > Absolutely.  But I'm not clear what you mean by "from a
> > website".  Do you mean to use SMPP protocol to lodge and
> > receive messages?  Or do you want access to your own cellular
> > hardware from a web interface?
>
> > > how would that work with costs? would the mobileowner pay both
> > > ways?
>
> > That depends on the country, the carrier and the offers/plans
> > that carrier makes.  In most of the civilized world, SMS
> > receivers pay nothing.
>
> > John
>
> i want to build a service where you can send an SMS with your
> cellphone to my website and then the site will collect the data you
> asked for and SMS it back.
>
> so what components would i need for that?


also, lets say i want to send a SMS to my own phone from the internet.
how would i do that?


From gagsl-py2 at yahoo.com.ar  Sun May 25 12:05:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 13:05:31 -0300
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <op.ubpwbhwsx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 03:37:00 -0300, <notnorwegian at yahoo.se> escribi?:

> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
>
> so obv i want fast insert. i want to delete duplicates too.
>
> which datastructure is best for this?

Use a list, and the bisect module to keep it sorted:

py> import bisect
py> def insert_nodupes(slist, item):
...   i = bisect.bisect_left(slist, item)
...   if i>=len(slist) or slist[i] != item:
...     slist.insert(i, item)
...
py> items = []
py> insert_nodupes(items, 'link to some site')
py> insert_nodupes(items, 'another link')
py> insert_nodupes(items, 'third site')
py> insert_nodupes(items, 'another link')
py> items
['another link', 'link to some site', 'third site']

-- 
Gabriel Genellina



From arnodel at googlemail.com  Fri May  2 14:23:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 02 May 2008 19:23:54 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
Message-ID: <m21w4kbm4l.fsf@googlemail.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

>
> There are no modern processors with an opcode for incrementing a memory
> location!?  At least my C64 can do that.  ;-)

Indeed!  I remember a simple use was to make the border change colour
very fast, a v. cool effect when you're 12!
 
        CLV
LOOP:   INC $D020
        BVC LOOP

(from memory, untested!)

-- 
Arnaud


From goldspin at gmail.com  Sun May 18 15:13:34 2008
From: goldspin at gmail.com (Henry Chang)
Date: Sun, 18 May 2008 12:13:34 -0700
Subject: What's the api tat I should use to connect python to a MS Access
	Db?
In-Reply-To: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>
References: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>
Message-ID: <fee514130805181213t1beda90ao3dd844cc5f4da372@mail.gmail.com>

A simple google search:
http://bytes.com/forum/thread637384.html

On Sun, May 18, 2008 at 10:57 AM, David Anderson <zerty.david at gmail.com>
wrote:

> Please answer me the question of the subject =)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080518/f0240fe3/attachment.html>

From bignose+hates-spam at benfinney.id.au  Tue May 20 23:34:15 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 May 2008 13:34:15 +1000
Subject: Code/test ratio wrt static vs dynamic typing
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
	<69hi0iF32kli9U1@mid.individual.net>
Message-ID: <87bq30gwjs.fsf@benfinney.id.au>

greg <greg at cosc.canterbury.ac.nz> writes:

> Also, I don't think it's valid to equate the size of the tests with
> the amount of effort it took to develop them. For instance, the test
> suite for Pyrex is currently larger than the Pyrex compiler, but
> I've still spent far more time and effort developing the compiler
> than writing the tests.

Right. The unit test suite should tend to increase: add tests far more
often than removing them. The application code, though, should tend to
grow less rapidly: refactor duplication, remove redundant code, and
add new code.

This should tend to result in the unit test suite growing over time
faster than the application code does, even if roughly the same effort
goes into both. Thus the size of each is not a good indicator of the
amount of effort.

-- 
 \           "I got a postcard from my best friend, it was a satellite |
  `\      picture of the entire Earth. On the back he wrote, 'Wish you |
_o__)                                   were here'."  -- Steven Wright |
Ben Finney


From mensanator at aol.com  Fri May 30 20:59:03 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 17:59:03 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com> 
	<mailman.1786.1212191104.12834.python-list@python.org>
Message-ID: <30b8b4ff-f0e5-4178-b9f7-513a5e404982@z72g2000hsb.googlegroups.com>

On May 30, 6:44?pm, Joshua Kugler <jkug... at bigfoot.com> wrote:
> Skonieczny, Chris wrote:
> > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> >http://mail.python.org/pipermail/python-list/2007-February/427841.html
>
> > It is not true - eg. try :
> > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > b=int(a)
> > and what you will get ? An error !!!
>
> > Or probably you yourself should - quote :
> > "You probably should go through the tutorial ASAP that is located here:
>
> >http://docs.python.org/tut/"
>
> int() converts a strings that is a valid intenter. ?What you're looking for
> is ord().

Possibly. Perhaps the OP wants the position of 'P'
in the alphabet, in which case he wants b=64-ord(a)
or b=16.

>
> In [1]: ord('d')
> Out[1]: 100
>
> In [2]: a='P'
>
> In [3]: b=ord(a)
>
> In [4]: b
> Out[4]: 80
>
> j



From sjmachin at lexicon.net  Sat May 17 10:19:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 17 May 2008 14:19:56 GMT
Subject: Distributing applications that use 3rd party modules
In-Reply-To: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <482ee989@news.mel.dft.com.au>

eliben wrote:
> Hello,
> 
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
> 
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
> 
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
> 
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.

What do you call "huge"?

In my environment the end-users don't have Python installed on their own 
PCs, but the team does have a networked shared drive; we put py2exe'd 
applications there. Less complaints about app load time than for things 
like Word/Excel/Outlook, and no complaints from me about distribution, 
and no worries about users running old versions.

Cheers,
John


From prudek at bvx.cz  Sun May 25 03:26:23 2008
From: prudek at bvx.cz (Milos Prudek)
Date: Sun, 25 May 2008 09:26:23 +0200
Subject: module import problem
In-Reply-To: <g1a5ku$b70$01$1@news.t-online.com>
References: <mailman.1545.1211668266.12834.python-list@python.org>
	<g1a5ku$b70$01$1@news.t-online.com>
Message-ID: <200805250926.23422.prudek@bvx.cz>


> Reinstall the package "python-gnupginterface" with "sudo aptitude reinstall

Your advice helped! Upgrade is running now. Thanks!

-- 
Milos Prudek


From kyosohma at gmail.com  Fri May  2 15:13:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 12:13:16 -0700 (PDT)
Subject: pil:effbot and pythonware offline
References: <8a2150b5-dfbf-419b-af10-af88932584ff@8g2000hse.googlegroups.com>
Message-ID: <84e9f4c6-4f34-4331-8815-8f69e9fde500@f63g2000hsf.googlegroups.com>

On May 1, 5:15 pm, spdegabrielle <spdegabrie... at gmail.com> wrote:
> Sorry, I'm new to python and was trying to get imageTK;
> this led me to try find PIL, but pythonware and effbot both seem to be
> offline.
>
> I can't find any mention of an outage on python.org, this newsgroup,
> or the planet-blogs.
>
> Is it just me? and does anyone know where I can find ImageTK?
>
> Cheers,
>
> stephen

They both seem to be up now. Maybe there was some simultaneous server
maintenance?

Mike


From paddy3118 at googlemail.com  Thu May 15 01:47:17 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 14 May 2008 22:47:17 -0700 (PDT)
Subject: Sanitised Newsgroup Feeds?
Message-ID: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>

Hi,
Does anyone do a sanitised newsgroup feed? Something like what mail
filters do for email?

It is getting tedious wading through the ads for 'cracks' & watches;
as well as the Xah cross-posted self-promotions, the wx-'its easier to
post than read the tutorial' annoyances and the castiro (human/Eliza?)
weirdnesses.
I guess that many would want to add the same things to their kill
file,  but it takes me three clicks to add anyone/any thread to it and
the c.l.p signal-to-noise is getting lower.

I'd like to thank the posters of the weekly summary - it's great and I
will continue to read it, but It is more fun reading and posting to
Python blog-posts via a Google Reader search, than it is c.l.p

Python popularity is a double-edged sword.

- Paddy.


From miki.tebeka at gmail.com  Mon May 26 14:31:09 2008
From: miki.tebeka at gmail.com (Miki)
Date: Mon, 26 May 2008 11:31:09 -0700 (PDT)
Subject: Using Python to unit test C code
References: <mailman.1621.1211825961.12834.python-list@python.org>
Message-ID: <451913de-b548-4c42-9b72-b262663e8482@x19g2000prg.googlegroups.com>

Hello,

> I would like to hear any information about how to unit test C code using Python.
I never done it, but you can either generate a Python wrapper (using
SWIG, Boost.Python, Pyrex ...) and then test the wrapper, or directly
call the C module functions using ctypes.

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com


From bignose+hates-spam at benfinney.id.au  Sat May  3 02:05:41 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 16:05:41 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <87r6cjylai.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> The shebang line (the initial line of the file beginning with "#!")
> takes advantage of OS kernels that determine how to execute a file
> based on the first few bytes of the file. The shebang line tells the
> kernel that this file should be executed by passing it as input to a
> process started by another command.
> 
> The specified command takes the form of a fully-qualified file path,
> and zero or one arguments to the program. That command is then
> executed by the kernel, and the Python program file is passed as
> input to the resulting process.

As was pointed out later in the thread, this description is partially
untrue. The program isn't passed as input to the interpreter.

Instead, the path to the program is appended as a command-line
argument to the interpreter. Thus the kernel starts a command of the
form:

    <word after the shebang> <optional single argument after the first word> <path to the program>

Examples:

    filename:              /home/foo/bar.py
    shebang line:          #! /usr/bin/python
    command line invoked:  /usr/bin/python /home/foo/bar.py

    filename:              /home/foo/Makefile
    shebang line:          #! /usr/bin/make -f
    command line invoked:  /usr/bin/make -f /home/foo/Makefile

For more information on shebang processing, see
<URL:http://foldoc.org/index.cgi?shebang> for a basic description, and
<URL:http://www.in-ulm.de/~mascheck/various/shebang/> for lots of gory
detail.

-- 
 \               "There's no excuse to be bored. Sad, yes. Angry, yes. |
  `\    Depressed, yes. Crazy, yes. But there's no excuse for boredom, |
_o__)                                       ever."  -- Viggo Mortensen |
Ben Finney


From tarun.kap at gmail.com  Fri May  2 14:23:28 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 11:23:28 -0700 (PDT)
Subject: calling variable function name ?
References: <cf179899-177f-4516-95dd-f368eaf7c6a7@f63g2000hsf.googlegroups.com>
	<ad02220c-294c-4c6a-bc61-3165bf5ab08e@f63g2000hsf.googlegroups.com> 
	<57461074-8fd1-4e65-9bc9-2ac916aa1fb5@y21g2000hsf.googlegroups.com> 
	<m28wyvba54.fsf@googlemail.com>
Message-ID: <b2d6c91e-2c97-4964-b094-d14bf32a71ad@f63g2000hsf.googlegroups.com>

On Apr 30, 11:05 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> TkNeo<tarun.... at gmail.com> writes:
>
> > George - Thanks for your reply but what you suggested is not working:
>
> > def FA(param1,param2):
> >     print "FA" + param1 + " " + param2
> > def FA(param1,param2):
> >     print "FB" + param1 + " " + param2
> > def FA(param1,param2):
> >     print "FC" + param1 + " " + param2
>
> > temp = sys.argv[1]
>
> > func = globals()["F" + temp]
> > func("Hello", "World")
>
> > I ran the script with first parameter as B and i get the following
> > message
> > KeyError: 'FB'
>
> Perhaps if you call your three function FA, FB, FC instead of FA, FA,
> FA it'll help?
>
> --
> Arnaud

oh crap. I can't believe I was doing that ! :) Thanks for pointing
out. works perfect.



From gagsl-py2 at yahoo.com.ar  Sat May 24 15:54:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 16:54:08 -0300
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
	<vochg5-bo9.ln1@buckbeak.hogwarts>
Message-ID: <op.ubob8inqx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 20:38:39 -0300, Andreas Matthias <amat at kabsi.at> escribi?:

> inhahe at gmail.com wrote:
>
>> actually i ddin't think about the fact that you're overloading dict, which
>> can already take multiple values in getitem
>
> Oh, I didn't know that. I totally misinterpreted the error message.
>
>
>> so how about
>>
>> class crazy: pass
>>
>> and then in your dict class:
>>
>> def __getitem__(*args):
>
> Apparently, args already is a tuple, so this should be:
>
>   def __getitem__(self, args):
>
> Is this documented somewhere? I couldn't find it anywhere.

No, that's not correct. First, there is nothing special with the arguments to dict.__getitem__ -- except that the syntax obj[index] provides a delimiter and it allows for obj[a,b] as a shortcut for obj[(a,b)] -> obj.__getitem__((a,b))

You may use the *args notation in any function; it is always a tuple (a singleton, when you call the function with only one argument)

py> def foo(*args): print args
...
py> foo(1)
(1,)
py> foo(1,2)
(1, 2)
py> foo((1,2))
((1, 2),)

Compare with:

py> def bar(arg): print arg
...
py> bar(1)
1
py> bar(1,2)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: bar() takes exactly 1 argument (2 given)
py> bar((1,2))
(1, 2)

-- 
Gabriel Genellina



From tjreedy at udel.edu  Thu May  8 20:31:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 20:31:30 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>
Message-ID: <g0060u$97s$1@ger.gmane.org>


"Jon Harrop" <jon at ffconsultancy.com> wrote in message 
news:5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d at plusnet...
| Perhaps the best example I can think of to substantiate your original 
point
| is simple comparison because Mathematica allows:
|
|  a < b < c
|
| I wish other languages did.

Python does also. 





From kay.schluehr at gmx.net  Fri May 23 00:54:40 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 22 May 2008 21:54:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <2f34b8a9-9334-44f0-bb24-6dba373d643f@z72g2000hsb.googlegroups.com>

On 13 Mai, 01:39, Dave Parker <davepar... at flamingthunder.com> wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder athttp://www.flamingthunder.com/ , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

"Why on earth shall kids program and even more serious: why shall I
program in a language for kids?"




From mathieu.prevot at ens.fr  Sat May 24 09:18:47 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Sat, 24 May 2008 15:18:47 +0200
Subject: PIPE stderr
Message-ID: <3e473cc60805240618v12661458gacb174df7de81cc3@mail.gmail.com>

Hi again,

I don't have the same ouptput between 1) and 2) ... what's happening ?

1)
wget http://www.youtube.com/v/A8bwZf3vXjg -O /dev/null 2> file

2)
k = Popen (["wget", "http://www.youtube.com/v/A8bwZf3vXjg", "-O", "/dev/null"],
stderr=PIPE)
print k.stderr

In the case 2) I got:

open file '<fdopen>', mode 'rb' at 0x5a608>

and I want what I get in file from 1) ... how to do this ?

Mathieu


From mail at timgolden.me.uk  Wed May  7 10:19:31 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 15:19:31 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>	<48216129.5090405@timgolden.me.uk>	<mailman.698.1210153360.12834.python-list@python.org>
	<f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>
Message-ID: <4821BA73.7070600@timgolden.me.uk>

Mike Driscoll wrote:
> On May 7, 4:45 am, Tim Golden <m... at timgolden.me.uk> wrote:
>> In a spirit of being helpful... :)

[... snip registry walker ...]

> This is pretty cool stuff, Tim. Of course, it would also seriously
> screw up some programs if you decided to replace the wrong phrase.
> Just a word of warning to the OP: be sure to make a backup of the
> registry before doing something like this. Trying to fix a messed up
> registry from the command line is not a fun way to spend the
> afternoon.

Good point, Mike. In a spirit of being even more helpful... the _winreg
module includes the functions SaveKey and LoadKey so as a crude
backup mechanism, you could do this:

<code snippet>
import time
import _winreg
import win32api
import win32security

#
# You need to have SeBackupPrivilege enabled for this to work
#
priv_flags = win32security.TOKEN_ADJUST_PRIVILEGES | win32security.TOKEN_QUERY
hToken = win32security.OpenProcessToken (win32api.GetCurrentProcess (), priv_flags)
privilege_id = win32security.LookupPrivilegeValue (None, "SeBackupPrivilege")
win32security.AdjustTokenPrivileges (hToken, 0, [(privilege_id, win32security.SE_PRIVILEGE_ENABLED)])

root = _winreg.OpenKey (_winreg.HKEY_LOCAL_MACHINE, r"Software\Python\TEST")
#
# This will fail if the file already exists so make it uniqueish
#
_winreg.SaveKey (root, "c:/temp/HKLM_Software_Python-%s.reg" %  time.strftime ("%Y%m%d-%H%M%S"))

</code snippet>

Note that the file which this creates is *not* the same as a .reg file which the File > Export menu
option provides from within the registry editor. (In fact, I shouldn't really have called it .reg; call
it something else). It can be reloaded by the _winreg.LoadKey function -- which I notice is incorrectly 
named RegLoadKey in the docs after the underlying API call. The docs note that SeRestorePrivilege is 
required for this action, the counterpart to SeBackupPrivilege.

TJG



From jeffrey at fro.man  Tue May  6 10:24:08 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 06 May 2008 07:24:08 -0700
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>

notbob wrote:
> I'm running 
> vers 2.5.1 on slackware 12.

Nice to see another Slackware user around here!


> "Here is an example of a user-defined function that has a parameter:
> 
> 
> def print_twice(bruce):
>     print bruce, bruce
<snip>
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet?

That's correct. A function doesn't generally *do* anything until it is
called. Here, it is only defined. The only thing this function does when
called is to print the value of bruce twice.

> I define myfirstfunction in the pyth 
> editor and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

Functions are objects too, and this is a printed representation of that
function object. It still hasn't been "called" at this point.


> ....when I add the ._doc_, it get this:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'function' object has no attribute '_doc_'
> ....so, there is a no go there, too.

The functions docstring is stored in the attribute named "__doc__". Like
other python "special" attributes, it starts and ends with TWO underscores.


> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

You are correct to create this script yourself from scratch.


> I then try an do the import thing above, but the pyth ed accepts none of
> it. not from:
> from ~/pyth/chap03/ import *
> from chap03 import *            #taken from ~/pyth/
> ....nor from any other configuration I can imagine, so that "from" command
> makes no sense.

Modules are imported from your PYTHONPATH, which is a search path similar to
bash's PATH: It is a list of directories that are searched for *module*
names when you attempt an import. You can examine your python path by
doing:

>>> import sys
>>> sys.path

Your module files, i.e., chap03.py, should be in one of the directories on
that path.

"from" modifies a *module* name, not a path component. So "from module
import one_function, another_function". This allows you to use one_function
without referencing it through the imported module name. In other words,
these two are equivalent:

>>> import chap03
>>> chap03.print_twice()

and:

>>> from chap03 import print_twice
>>> print_twice()

In the above examples, "chap03" is the *module* file, chap03.py.


Hope that helps clarifies things a bit,
Jeffrey


From hans at poltras.com  Wed May 28 13:50:05 2008
From: hans at poltras.com (Hans Larsen)
Date: Wed, 28 May 2008 13:50:05 -0400
Subject: Problem with subprocess and mkstemp
Message-ID: <F6736732-8348-4221-B6B9-91141C044096@poltras.com>

Hello,

I'm having this script here:
----
import sys, tempfile, subprocess
if len(sys.argv) > 1:
	i = 0
	while i < 1000:
		print "Hello World" * 500
		i = i + 1
	exit( 1 )

h,fp = tempfile.mkstemp()
print "out: " + fp
out = open(fp, "r")
proc = subprocess.Popen( [sys.argv[0], "1"], stdout = h )
while proc.poll() is None:
	o = out.read()
	if o:
		print o
print out.read()
print "The end"
----

This scripts work wonders on Windows (and I've heard Linux is doing  
well too tyvm - although if one of you could check, I don't have a  
linux ready), but on OSX it outputs nothing. If I change the stdout of  
the subprocess for a pipe, it works well.

I cannot confirm that the bug comes from Python, but I'm pretty sure  
this should work normally. Does anyone know of this problem? Is there  
a workaround? A fix, maybe?

We're using temporary files because a pipe hangs out with large  
output, such as this one.

Thanks a lot,
Hans Larsen
--
My definition of an expert in any field is a person who knows enough  
about what's really going on to be scared.
P. J. Plauger
Computer Language, March 1983

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From gagsl-py2 at yahoo.com.ar  Fri May  2 14:49:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 15:49:47 -0300
Subject: i want to add a timeout to my code
References: <53ffe104-be3b-43e2-b5c8-4ce5886ac60d@b1g2000hsg.googlegroups.com>
	<1f70ea43-7909-4bd8-b63d-2467e8a0542f@c65g2000hsa.googlegroups.com>
	<ac8721f0-fe0d-446b-8954-bd097e6d940a@f24g2000prh.googlegroups.com>
	<mailman.351.1209508222.12834.python-list@python.org>
	<2976bcad-e514-4a33-bf1a-5966997b6d42@1g2000prg.googlegroups.com>
Message-ID: <op.uajik90px6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 17:06:20 -0300, maehhheeyy <maehhheeyy at gmail.com>  
escribi?:
> On Apr 29, 3:29?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>> On Tue, 2008-04-29 at 14:47 -0700, maehhheeyy wrote:
>> > On Apr 17, 4:24 pm, Miki <miki.teb... at gmail.com> wrote:
>> > > On Apr 17, 1:10 pm,maehhheeyy<maehhhe.. at gmail.com> wrote:
>>
>> > > > I want to add a timeout so that when I pull out my gps from my  
>> serial
>> > > > port, it would wait for a bit then loop and then see if it's  
>> there. I
>> > > > also want to add a print statement saying that there is no GPS  
>> device
>> > > > found. However when I run my code and unplug my serial port, my  
>> code
>> > > > will just hang until I plug it back in.
>> > > > This is my code right now:
>>
>> > > > def GetGPS():
>> > > > ? ? ? data = []
>> > > > ? ? ? #Open com1: 9600,8,N,1
>> > > > ? ? ? fi = serial.Serial(0, timeout = 1)
>> > > > ? ? ? print '[gps module] SERIAL PORT OPEN ON COM1:'
>>
>> > >http://docs.python.org/lib/node545.html
>>
>> > I tried the code onto my codes but what came out was that in the line
>> > signal.signal(signal.SIGSLRM, handler), an attributeError appeared
>> > reading that 'module' object has no attribute 'SIGALRM'
>> > --
>> Are you writing your program on windows, or some other platform which is
>> not unix?
>>
> Yeah I'm using Windows 2000.

signal doesn't work on Windows. The timeout parameter to Serial should  
suffice...

-- 
Gabriel Genellina



From meesters at uni-mainz.de  Thu May 29 09:28:20 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Thu, 29 May 2008 15:28:20 +0200
Subject: seg. fault with Py_BuildValue?
Message-ID: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>

Hi

I'm having trouble with Py_BuildValue. I was able to pinpoint the following
statement as the one causing a seg. fault with my script:

static PyObject * funcname(PyObject *self, PyObject *args) {
...
  return Py_BuildValue("(OO)", x, y);
}
where x & y are both of type PyObject.

Any suggestions here? Do I need to handle the output of Py_BuildValue
somehow before returning? How? Need to decref x & y before returning?

TIA
Christian


From wxPythoner at gmail.com  Sun May 11 08:54:45 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 05:54:45 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
Message-ID: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>

To create a tuple with one element, you need to do this:

>>> my_tuple = (1,)    # Note the trailing comma after the value 1
>>> type(my_tuple)
<type 'tuple'>


But if you do this

>>> my_tuple = (1)
>>> type(my_tuple)
<type 'int'>

you don't get a tuple. I thought that just putting a value inside ( )
would make a tuple. Apparently that is not the case. I hate ugly code
so it would be clean if Python would convert anything put into ( ) to
be a tuple, even if just one value was put in (without having to use
that ugly looking comma with no value after it).


From Joshuajruss at gmail.com  Sun May 18 08:18:26 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sun, 18 May 2008 05:18:26 -0700 (PDT)
Subject: secret code?
Message-ID: <5bc52ed9-855e-4569-b3bd-a0c1ab6941d7@k37g2000hsf.googlegroups.com>

What would you guys says about this secret code? The key was
apparently lost. The guy never sent it, and he was never seen again.
It must stand for letters in the alphabet, but it almost looks like
trajectory tables. I don't know. What do you guys think?

http://i243.photobucket.com/albums/ff273/ezname420/code.jpg


From wuwei23 at gmail.com  Mon May 12 22:57:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 19:57:01 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
	<f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>
Message-ID: <d9eb4e04-5a9a-4c8a-b775-1410595cf65d@y18g2000pre.googlegroups.com>

On May 13, 5:50 am, JustMe <alastair.gra... at gmail.com> wrote:
> I'm in the same boat. My work seems fixated with .Net but IMHO I think
> they would be better off going with Python. Still, who am I to stand
> in the way of hundreds of .Net programmers.

You could always be the hero who teaches them IronPython :)

- alex23


From python at bdurham.com  Wed May 14 16:10:24 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 14 May 2008 16:10:24 -0400
Subject: enumerate() values starting at 1 vs. 0
In-Reply-To: <C7EBDB03-FEF1-4026-8CAB-057447D0B472@gmail.com>
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
	<1210795102.6483.1253187515@webmail.messagingengine.com>
	<C7EBDB03-FEF1-4026-8CAB-057447D0B472@gmail.com>
Message-ID: <1210795824.8556.1253189577@webmail.messagingengine.com>

Arnaud,

>> Is there any way to have enumerate() start at 1 vs. 0?
>>
>> The problem with starting at 0 is that many things in the real world
>> begin at 1 - like line numbers or labels in a list.

> I suppose you could redefine enumerate to support an optional argument:
> 
> from itertools import izip, count
> 
> def enumerate(iterable, start=0):
>      return izip(count(start), iterable)
> 
>  >>> list(enumerate('spam', 1))
> [(1, 's'), (2, 'p'), (3, 'a'), (4, 'm')]

Brilliant!! 

Thank you,
Malcolm


From castironpi at gmail.com  Wed May 14 11:44:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 08:44:18 -0700 (PDT)
Subject: PPyGui emulator
References: <mailman.1087.1210718589.12834.python-list@python.org> 
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
	<mailman.1116.1210769697.12834.python-list@python.org>
Message-ID: <64ea7e01-9355-4cf2-ba47-2efab79f912e@i76g2000hsf.googlegroups.com>

On May 14, 7:54?am, pyt... at bdurham.com wrote:
> Stef,
>
> Looks great!!
>
> Malcolm

Nice touch on the Spin / Slider / Progress.  Wink.


From paddy3118 at googlemail.com  Sat May 24 18:44:27 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 24 May 2008 15:44:27 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <fdc3b499-e029-4008-80e2-ace3f781f8c7@59g2000hsb.googlegroups.com>

On May 24, 3:14 pm, Fuzzyman <fuzzy... at gmail.com> wrote:
> On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
>
> > From whom are you trying to hide your attributes?
>
> Actually, 'data hiding', although vastly overused by the static crowd
> can be a reasonable thing to want.
>
> For example, at Resolver Systems we expose the spreadsheet object
> model to our users. It hasa public, documented, API - plus a host of
> undocumented internally used methods.
>
> We would really *much* rather hide these, because anything our
> customers start using (whether documented or not) we will probably
> have to continue supporting and maintaining.
>
> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.

"We told you not to use it in the API Docs"
"Those names with leading undoerscores means _DO_NOT_USE_IT"
"THose methods whose docstrings say DO NOT USE EXTERNALLY"

And if they still use them, then they'd be problematic no matter what
language was used.

Customers ey?
Can't live without 'em...
... Actually that's customers Sir!

:-)

- Paddy.



From rsoh.woodhouse at googlemail.com  Wed May 28 15:14:44 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 12:14:44 -0700 (PDT)
Subject: Threads and import
Message-ID: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>

Hi,

I'm trying to work out some strange (to me) behaviour that I see when
running a python script in two different ways (I've inherited some
code that needs to be maintained and integrated with another lump of
code). The sample script is:

# Sample script, simply create a new thread and run a
# regular expression match in it.
import re

import threading
class TestThread(threading.Thread):

    def run(self):
        print('start')
        try:
            re.search('mmm', 'mmmm')
        except Exception, e:
            print e
        print('finish')

tmpThread = TestThread()
tmpThread.start()
tmpThread.join()
import time
for i in range(10):
    time.sleep(0.5)
    print i

# end of sample script

Now if I run this using:

$ python ThreadTest.py

then it behaves as expected, ie an output like:

start
finish
0
1
2
...

But if I run it as follows (how the inherited code was started):

$ python -c "import TestThread"

then I just get:

start


I know how to get around the problem but could someone with more
knowledge of how python works explain why this is the case?

Thanks,
Rowan


From fiacre.patrick at gmail.com  Fri May 23 03:00:55 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:00:55 -0400
Subject: Write bits in file
In-Reply-To: <puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
Message-ID: <48366bcb$0$15164$607ed4bc@cv.net>

Tim Roberts wrote:
> Monica Leko <monica.leko at gmail.com> wrote:
>> I have a specific format and I need binary representation.  Does
>> Python have some built-in function which will, for instance, represent
>> number 15 in exactly 10 bits?
> 
> For the record, I'd like to point out that even C cannot do this.  You need
> to use shifting and masking to produce a stream of 8-bit bytes, or to
> extract your values from a stream of 8-bit bytes.


Hmmmm, bitfields are exactly non-aligned bits in a structure and are 
part of ANSI C.  Although C gives no guarantee of the ordering of fields 
within machine words ... so bitfieds are of limited use in portable 
programs unless they are 0-initialized.

IIRC, Huffman code uses arbitrary length bit strings and is the basis of 
many compression algorithms.






From martin at v.loewis.de  Fri May  2 15:41:48 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 21:41:48 +0200
Subject: IPv6 and Python
In-Reply-To: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <481B6E7C.2020602@v.loewis.de>

> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?

Information is spread widely. If you really want resources, I recommend
to google for them; there are various IPv6 howtos.

Here is how I would do it:

On Linux, "modprobe ipv6", then "ifconfig". This should display the
loopback adapter, with the address "::1". You should then be able to
listen on that address, and connect to it.

On Windows (XP SP2), "netsh int ipv6 install". Again, you should be able
to use IPv6 loopback afterwards.

If you want true connectivity to the global IPv6 internet, I recommend
SixXS (http://www.sixxs.net/). You can setup a tunnel to the IPv6 net
through your IPv4 POP, using a close IPv6 POP who participates in SixXS.
To set up the tunnel, you then use aiccu, which works really well for
me (and is packaged conveniently as a Debian package).

Regards,
Martin


From rdm at rcblue.com  Sat May 17 22:37:16 2008
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 May 2008 19:37:16 -0700
Subject: r' question
Message-ID: <20080518023835.61FE61E4009@bag.python.org>

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From inhahe at gmail.com  Wed May 21 12:05:29 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 12:05:29 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
Message-ID: <FJXYj.78134$%15.20121@bignews7.bellsouth.net>


<cokofreedom at gmail.com> wrote in message 
news:06ea8b72-598e-4455-b3f9-e614ddb6ad94 at p25g2000hsf.googlegroups.com...
> On May 21, 4:57 pm, "inhahe" <inh... at gmail.com> wrote:
>> one of the few things i miss from C is being able to use assignment in
>> expressions.   that's the only thing, really.
>> also there's no switch/case, you have to use a dictionary of functions
>> instead, although i rarely need that, usually i just use elif.
>
> One thing I hate from C is the assignment in expressions...Forcing
> myself to write
> 0 == Something
> rather than
> Something == 0

interesting trick, i've never thought of that/seen it
although if Python implemented it I think it should default to giving 
warnings when you use = in an expression, that way you don't have to worry.

> just to make sure I was mistakenly assigning values in statements is
> annoying, it ruins the ease of reading.
>
> I kind of agree with the select:case, but I think a key issue is how
> to implement it. Elif is reasonable for now.
>
> Diez, true I guess, but then we haven't seen what these expressions
> are, and why there has to be three. 




From bruno.42.desthuilliers at websiteburo.invalid  Mon May  5 10:38:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 05 May 2008 16:38:58 +0200
Subject: confused about self, why not a reserved word?
In-Reply-To: <9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <481f1c02$0$4907$426a74cc@news.free.fr>

globalrev a ?crit :
> sorry i noticed now a little error, i was playing around a lot and saw
> that on the sel-example i had then called foo.hello() instead of
> foo.Hello().
> 
> 
> but it was an informing error now i egt it. was wondering about self
> anyway so thanks for clearing it up.
> 
> 
> but it still is a bit confusing that u can pass with any word.
> wouldnt:
> 
> 
> class Foo(object):
> 	def Hello():
> 		print "hi"
> 
> 
> make more sense?

What would make sens in your example would be to either make hello a 
staticmethod, since it doesn't use any reference to the current instance 
nor it's class.


> the class-thing seems inside out somehow in python.

Python's object model is indeed a bit pecular wrt/ most mainstream 
OOPLs. But once you understand how it works, it happens to be mostly 
well designed (IMHO) and really powerful.

> if im doing
> foo.Hello() im already saying that im using the class foo because i
> did foo=Foo()

Nope. You are saying your using an instance of class Foo.

> before and then still when calling Hello() i am
> invisibly passing the class itself a s a parameter by default?

It's not the class that get passed (unless you use a classmethod, but 
that's not the case here), but the instance. And you are not "invisibly" 
passing it, you just pass it another way. In fact, foo.hello() is 
equivalent to type(foo).hello(foo).

> just seems backwards and weird.

Each and every OOPL needs to have a way to "inject" the instance a 
method was called on into the method's local namespace. Python solved 
this it's own way - by making 'methods' thin wrappers around 
instance/function couples, these wrappers being in charge of calling the 
function with the instance as first argument. From the implementation 
POV, this allow to build methods on existing, more general features - 
functions and the descriptor protocol - instead of having to 
special-case them. From the programmer's POV, this allow to define 
functions outside classes, then dynamically add them as 'methods' either 
on a per-class or per-instance basis.



From gagsl-py2 at yahoo.com.ar  Sat May 24 19:05:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 20:05:12 -0300
Subject: for some reason the actual tries figure is not right
References: <002301c8bdcc$979ce8c0$1300a8c0@Home>
Message-ID: <op.ubok2yurx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 15:32:56 -0300, garywood <woodygar at sky.com> escribi?:

> can someone explain why the tries displays the wrong number
> thanks
> orginally i started off with tries = 0 but it was off by 2

How would you count that if you were playing the game "for real"? I'd say that you start (mentally) at 0 and count one more each time the other player says a word.

In your code, there are *two* places where the player inputs his guess. A common idiom is to rearrange the code this way:

tries = 0
...
while True:
     guess = raw_input("Your guess: ")
     tries += 1
     # break out of the loop when player guesses
     if guess==correct:
         break
     print "Sorry..."
     ....
print "You guessed it in", tries, "tries."
...

(instead of all those if/else, try to use a dictionary to hold the "hint" corresponding to each word - you might even store several hints, as a tuple)

-- 
Gabriel Genellina



From lists at cheimes.de  Wed May  7 16:47:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 22:47:51 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
Message-ID: <48221577.6030408@cheimes.de>

grayaii schrieb:
> There are so many threads on this subject, but I ran across a
> situation on Windows that I can't figure out.
> 
> I'm trying to run this little command-line exe and when I launch like
> this, it hangs:
> 
>>>> import subprocess
>>>> command = r'c:\mydir\foo.exe'
>>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>>> returncode = run.wait()  ## HANGS HERE ##

The code blocks because you aren't reading from stdout and stderr. Use
the communicate() method instead of wait().

Christian


From dmitrey.kroshko at scipy.org  Fri May  9 06:46:51 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:46:51 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com> 
	<Xns9A9976D7CDC64duncanbooth@127.0.0.1>
Message-ID: <e3e88105-2532-42ef-86c1-8bd45b63b488@m36g2000hse.googlegroups.com>

Hmm... I thought this issue is available from Python2.5 only. I have
no other interpreters in my recently installed KUBUNTU 8.04.

Thanks all,
D.

On 9 ???, 13:41, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> dmitrey <dmitrey.kros... at scipy.org> wrote:
> > On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> >> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> >> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> >> > and
> >> > list2 = [0, 2, 4] # integer elements
>
> >> > howto (I mean most simple recipe, of course) form list3 that contains
> >> > elements from list1 with indexes from list2, i.e.
>
> >> list3 = [list1[i] for i in list2]
>
> > Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> > (preferable) 2.3 compatible.
> > Are there other solutions?
> > D.
>
> Did you try Paul's suggestion?
>
> Python 2.3.5 (#1, Oct 13 2005, 09:17:23)
> [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> >>> list2 = [0, 2, 4]
> >>> list3 = [list1[i] for i in list2]
> >>> list3
>
> ['elem0', 'elem2', 'elem4']



From kyrie at uh.cu  Thu May 15 20:05:51 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 15 May 2008 20:05:51 -0400
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <200805152005.52062.kyrie@uh.cu>

On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> Why can't I write this?
> --
> http://mail.python.org/mailman/listinfo/python-list

yield recieved.

Thanks. 

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From janzert at janzert.com  Tue May 13 22:44:53 2008
From: janzert at janzert.com (Janzert)
Date: Tue, 13 May 2008 22:44:53 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1059.1210699996.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>	<68t4o0F2vaoncU1@mid.uni-berlin.de>	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>	<68trmmF2vjivnU1@mid.uni-berlin.de>	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <qosWj.251$R_2.217@newsfe07.lga>

D'Arcy J.M. Cain wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>> Not everybody has grown in English-speaking community, you know. And
>> knowing math quite good, I prefer writing "x = y" instead of "Set x to
>> y".
> 
> OMG!  It's COBOL.
> 
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  If that wasn't true then pseudocode would look a lot more
> like English than it does.  In fact, pseudocode tends to look a lot
> like Python.
> 

I don't always agree with him but I thought Dave Thomas' recent post[1] 
about 'natural language like' programming languages was pretty spot on. 
He is specifically talking about Domain Specific Languages (DSLs) but I 
think it applies to general programming languages just as well.

Janzert

1. http://pragdave.blogs.pragprog.com/pragdave/2008/03/the-language-in.html


From Scott.Daniels at Acm.Org  Mon May  5 20:44:44 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 05 May 2008 17:44:44 -0700
Subject: Nested os.path.join()'s
In-Reply-To: <mailman.587.1209997341.12834.python-list@python.org>
References: <mailman.587.1209997341.12834.python-list@python.org>
Message-ID: <Mr-dnU8iro6XNYLVnZ2dnUVZ_hqdnZ2d@pdx.net>

Paul Scott wrote:
> ... example:
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah
> 
> Question is, is there a better way of doing this? The above *works* but
> it looks kinda hackish...

You've had the joining addressed elsewhere, but note that:
     if os.path.exists(os.path.join(basedir, picdir)):
         blah blah
is a lot better than comparing to True.

--Scott David Daniels
Scott.Daniels at Acm.Org


From vdv100 at gmail.com  Sun May  4 14:20:07 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 19:20:07 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
	<eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
	<18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>
Message-ID: <eba8281a0805041120o4dbed6dbl251c150d316ee099@mail.gmail.com>

2008/5/4 David <wizzardx at gmail.com>:

> > What I want is display a window with a image, the user select a region
> of
> > the image, and the region value is passed to my program, my program
> slice
> > the image region, and analyze it.
> >
>
> If it's your apps own window, then getting a rectangle selected by the
> user is simple.
>
> 1) Make skeleton x/gtk/wx/qt/etc app
> 2) Add code to show an image
> 3) Add code to capture mouse events
> 4) Add code to show the 'rubber band' rectangle over the mouse selection
> area
> 5) When the user releases the mouse, then extract the part of the
> rectangle between where a mouse button was clicked and where it was
> released.
>
> All this would be in the docs for the Python x/gtk/wx/qt/etc libs.
> Where is the difficulty?


Right now I don't have any difficulty :)
I just asked for a library to do that, if exist I don't have to write all
the things from scratch (the selection part), but I am able to do my tasks
easily with Xlib or Pygame.

Thanks for the help.

Cheers,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org


>
> David.
>
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From bockman at virgilio.it  Wed May 21 08:48:25 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Wed, 21 May 2008 05:48:25 -0700 (PDT)
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <8586a78d-5614-4700-97aa-37c867fab695@l42g2000hsc.googlegroups.com>

On 21 Mag, 14:31, srinivas <srinivas.puvv... at gmail.com> wrote:
> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
>
> i have ?python in folder C:\python25\..
> and functions folder D:\programs\Functions\
>
> pls help me friends how to do that.

You have two choices:

1. In this way you can import single modules (files) in tour folder

import sys
sys.path.append(r'D:\programs\Functions\')
import my_module_1
import my_module_2

and then  use whatever you have in the modules:

my_module_1.my_function()
print my_module_1.my_variable


2.
If you add an empty python module called __init__.py inside the folder
D:\programs\Functions\,
then python will handle the folder as a package (i.e. a group of
modules) and  you can import
them in this way:

sys.path.append(r'D:\programs\')
import Functions # I'm not sure this is needed ...
from Functions import my_module_1, my_module_2

And then use whatever is in your modules as in case 1.

If you put any code in __init__.py, this code will be executed when
the import Functions
statement is executed. This can be handy in some cases, e.g. if you
have subfolders of
Function folder and want to extend sys.path to include all them.

For more details, read the section 6 of Python tutorial.

HTH

Ciao
------
FB


From bbxx789_05ss at yahoo.com  Fri May 16 15:25:34 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 16 May 2008 12:25:34 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
Message-ID: <104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>

globalrev wrote:
> i ahve a program that takes certain textsnippets out of one file and
> inserts them into another.
>
> problem is it jsut overwrites the first riow every time.
>
> i want to insert every new piece of text into the next row.
> so:
> 1. how do i write to a new line every time i write to the file?
>
> 2. if i dont want to write to a new line but just want to insert it
> after the last token in the file, how do i do then?

Generally, you can't "insert" anything into a file.  You can either
append to the end of a file, or you can rewrite the whole file.  It
sounds like you probably want to read the file into an array using
readlines().  Then manipulate that array however you want--appending
and inserting--and when you are done, overwrite the file with your
array.

However, you should be aware that as soon as you open a file for
writing all the data is erased, and if your program should happen to
crash right then, the array containing the data will disappear into
the ether and your file will be empty--in other words all your data
will be gone.  To prevent such an occurence, you should write your
final data to another file, then delete the original file, and finally
change the other file's name to the original file name.



From ivan.illarionov at gmail.com  Mon May 26 15:45:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 19:45:19 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
	<g1f2v2$129$01$1@news.t-online.com>
Message-ID: <g1f40f$2avo$1@news.mtu.ru>

On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:

> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
> 
>> If the OP wants PHP-style programming he will get better results with
>> PHP because PHP was designed this way. Any Pythonic solution will be an
>> overkill.
> 
> Better shoot yourself in the foot with a PHP-like Python-thing, than
> committing suicide by shooting yourself into the head with PHP ...

:) I can't imagine anything uglier than Python with its significant 
whitespace wrapped inside HTML. I guess it could be more damaging than 
PHP which was written exactly for this purpose.


From paul at floorball-flamingos.nl  Fri May  2 11:40:02 2008
From: paul at floorball-flamingos.nl (Paul Melis)
Date: Fri, 02 May 2008 17:40:02 +0200
Subject: Getting started with pyvtk
In-Reply-To: <ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
	<ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
Message-ID: <481b35eb$0$24406$5fc3050@news.tiscali.nl>

Peter Pearson wrote:
> On Thu, 01 May 2008 16:45:51 -0500, Robert Kern <robert.kern at gmail.com> wrote:
>> pyvtk is not the Python interface to VTK. It is for the
>> creation of VTK files.  The vtk(1) command is a Tcl shell
>> with the VTK libraries loaded (I believe).  Read the VTK
>> documentation for information on the Tcl interface if you
>> really want to use it. 
> 
> You're right: I don't really want to use it.
> 
>> The Python interface is also included in the VTK sources,
>> although it might not have been built on your machine. You
>> have to enable it when you build VTK itself. The Python
>> interface is essentially the same as the C++
>> interface. There are Python examples in the VTK source
>> tree.
> 
> That's the ticket: I don't want to "import pyvtk", I
> want to "import vtk" and ape /usr/share/vtk/.../*.py.
> 
> Thanks.

I'm not sure you've been helped so far as you seem to already understand 
about pyvtk not being the official VTK bindings :)

So, what would you like to know?

Paul



From grante at visi.com  Mon May 12 10:46:07 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:46:07 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
Message-ID: <lI6dnUFf8M6yxbXVnZ2dnUVZ_gKdnZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Paddy <paddy3118 at googlemail.com> writes:
>
>> I've used Fortran and C and so would tend to use either i,j,k as the
>> unused loop variable above, or, for clarity, call it something
>> descriptive like loop_count, if the loop body would be clearer.
>
> The problem with all of these names is that they also have long
> precedent as names of values that *will* be used inside the loop.

I guess people who standardize on loop_count never nest loops. :)

> Because of the precedent of those names, choosing one of those
> names doesn't make it clear to the reader that the value is
> never used; they have no indication from you of that until
> they look over the code a few times. It's implicit rather than
> explicit.

And when somebody adds a nested loop things fall apart.

-- 
Grant Edwards                   grante             Yow! BARBARA STANWYCK makes
                                  at               me nervous!!
                               visi.com            


From yves at zioup.com  Fri May  9 10:57:11 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 14:57:11 GMT
Subject: Grabbing previous iteration in a dict
In-Reply-To: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<7xabizkdui.fsf@ruckus.brouhaha.com>
	<254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
Message-ID: <bDZUj.126762$Cj7.126335@pd7urf2no>

dannywebster at googlemail.com wrote:
>> You cannot rely on the elements of a dictionary being in any
>> particular order (dicts are internally hash tables), so the above
>> is almost certainly ont what you want.
> 
> 
> Hi - thanks for your reply.  How about if I made the dict into a list
> (of
> which I have done).  How would I then reference the previous item?
> Can they
> be indexed?

Yes, I ran in a situation similar to yours, I read the content of a file, 
and had to both keep the order of the lines in the original file, and create 
a dictionary from the lines. So I created a class that contained both a 
dictionary and a tuple containing the keys of the dictionary in the original 
order. Something like this:

class mydict(object):

   def __init__(self, filename):
     x = [ e.strip().split() for e in file(filename) ]
     self.ordered_lines = tuple([ e[0] for e in x ])
     self.dictionary = dict( zip(self.ordered_lines, [ e[1:] for e in x]) )

a = mydict('/some/file')
a.ordered_lines
a.dictionary



Yves.
http://www.SollerS.ca


From celoserpa at gmail.com  Thu May 15 22:32:38 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 23:32:38 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
	<op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <1e5bcefd0805151932ie56e5dcx999c5181ce799f27@mail.gmail.com>

>
> That depends on what you consider "valid". Just duplicating the function
> code in the test is absurd and pointless.


Yes, the code is duplicated, and now I see your point. Thanks! However, that
code would always generate the same string (despite the timestamp). But that
was a violation of the DRY principle. And the specs don't really care if it
is a md5, only that the string is unique.

New mantra: Test to the interfaces (as in program to the interfaces) :)

However, I'm curious on how you would test the mathprogram.divide(x,y)
function. But in this case I'm not testing the implementation. I don't care
how the divide process is done, only that it is done correctly (10/2 = 5).
Actually my posted example was meant to be like this:

def test_divide
  divdend = 10
  divisor = 2
  expected_result = 5
  #10/2 should be 5, so let's test if the method gets it right:
  self.assertEquals(mathprogram.divide(dividend,divisor), expected_result)

I'd say they are still unit tests


Yes. Now that I think of, they all really only change in **scope**.

It's hard to re-wire your brain and break old habits, so, thanks for
helping!

Marcelo.

On Thu, May 15, 2008 at 11:19 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 15 May 2008 22:44:17 -0300, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> escribi?:
>
>  @Gabriel: I understand what you are saying. It all depends on what you
>> want
>> to test. In this case, I wanted to test the algorithm of the method.  The
>> test_generate_chat_dir_string is meant to do just that: Check if the
>> generate_chat_dir_string generated a "valid" (according to the specs)
>> string
>> for a "chat dir name".
>>
>
> That depends on what you consider "valid". Just duplicating the function
> code in the test is absurd and pointless. Of course it will pass now -
> you're executing the same code! On the other hand, what if you later want to
> replace the algorithm and use SHA1 instead of md5? The test will fail then -
> but do you *actually* care whether it actually returns the md5 digest or
> something else?
> If you *do* care, then you should compute the output by hand (or assume it
> is correct *now*) and hard code THAT string in the test, not recompute it
> again.
> If you *don't* care, then follow the steps I outlined in the previous
> message: just ensure that different inputs give different outputs.
>
>  It is not a integration nor a functional "unit" test, but it is a "real"
>> unit test in the sense that I created a test for each method and I
>> exercised
>> the methods the following way:
>>
>>  1) Got some data to test and...
>>  2) ... Generated an output "manually" in the test method that I knew were
>> the expected return of the tested method;
>>  3) Fed this data to the tested method and compared the manually generated
>> result with the return value of the method.
>>
>> It is like testing a method that does a simple division:
>>
>> def test_divide
>>  divdend = 10
>>  divisor = 2
>>  expected_result = 5
>>  self.assertEquals(mathprogram.divide(dividend,divisor),5)
>>
>
> Mmm, no, your posted example was more like this:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = dividend/divisor
>   self.assertEquals(mathprogram.divide(dividend,divisor), 5)
>
> You *computed* the expected result using (presumably) the same code as the
> tested function.
>
>  The techniques you explained in your message sound more like functional
>> testing or integration + functional testing where multiple aspects of a
>> single functional unit are being exercised. Or am I wrong?
>>
>
> I'd say they are still unit tests. I'm testing a single function, comparing
> the expected output with the actual output. But I only check the *public*
> interfase of the function, what their users expect from it (its contract, if
> you want); I don't check the internal implementation.
> The real value of unit tests comes when you want to modify something, or
> reimplement it. You must ensure that you don't break other things. With a
> too strict test very tied to the current implementation, you can't change
> anything.
>
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From znfmail-pythonlang at yahoo.com  Mon May 19 10:18:00 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Mon, 19 May 2008 10:18:00 -0400
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
Message-ID: <g0s26t$s2c$1@aioe.org>

Thanks, since posting I  figured out how to interpret the histogram results, 
which seems to be the consensus in responses. I wrote a check image program 
and have been periodically calling it against a folder where I make a copy 
of our images used for production. My method right now is to check what we 
send for errors, but is not preventive.

Also I determined whitespace is not the only issue, any color that 
dominates. I'm considering rewriting this code below to setup bins, so if 
combined neighboring colors exceeds the threshold then reject the image. I 
have examples where half the image appears black, but actually varies 
throughout.

Since my image is RGB I'm looping through a 768 element list.

Zach-

import Image, os


def check_image(file):

    try:
        im = Image.open(file)
    except:
        return "Can't open file %s " % file

    imData = im.histogram()
    i = 0
    for ea in imData:
        if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
            return "bad image %s - %s element num is %s " % (file, ea, 
str(i))
        i = i + 1

    return "good image %s, image size is %s" % (file, im.size)


def main(dir):
    data = ""
    try:
        files = os.listdir(dir)
        for ea in files:
            data = data + str(check_image(os.path.join(dir,ea))) + "\n"
    except:
        return "Can't get files in %s" % dir
    return data

print main("\\\\host\\path\\to\\image_folder\\")


"Ken Starks" <straton at lampsacos.demon.co.uk> wrote in message 
news:g0o0h3$jd4$1$8300dec7 at news.demon.co.uk...
> As others have said, PIL has the 'histogram' method to do most of the 
> work. However, as histogram works on each band separately, you have
> a bit of preliminary programming first to combine them.
>
> The ImageChops darker method is one easy-to-understand way (done twice),
> but there are lots of alternatives, I am sure.
>
>
> # ------------------------------------
>
> import Image
> import ImageChops
>
> Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> R,G,B = Im.split()
>
> Result=ImageChops.darker(R,G)
> Result=ImageChops.darker(Result,B)
>
> WhiteArea=Result.histogram()[0]
> TotalArea=Im.size[0] * Im.size[1]
> PercentageWhite = (WhiteArea * 100.0)/TotalArea
>
>
>
>
>
> Poppy wrote:
>> I've put together some code to demonstrate what my goal is though looping 
>> pixel by pixel it's rather slow.
>>
>> import Image
>>
>> def check_whitespace():
>>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
>>
>>     size = im.size
>>
>>     i = 0
>>     whitePixCount = 0
>>     while i in range(size[1]):
>>         j = 0
>>         while j in range(size[0]):
>>             p1 = im.getpixel((j,i))
>>             if p1 == (255, 255, 255):
>>                 whitePixCount = whitePixCount + 1
>>                 if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
>> 1404) / 4) 25%
>>                     return "image no good"
>>             j = j + 1
>>         i = i + 1
>>
>>     print whitePixCount
>>
>>     return "image is good"
>>
>> print check_whitespace()
>>
>>
>> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>> I need to write a program to examine images (JPG) and determine how much 
>>> area is whitespace. We need to throw a returned image out if too much of 
>>> it is whitespace from the dataset we're working with. I've been 
>>> examining the Python Image Library and can not determine if it offers 
>>> the needed functionality. Does anyone have suggestions of other image 
>>> libraries I should be looking at it, or if PIL can do what I need?
>>>
>> 



From castironpi at gmail.com  Fri May 16 11:27:21 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:27:21 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com> 
	<9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com> 
	<f821aecb-68a7-4aab-9cbd-b7fd054364eb@y38g2000hsy.googlegroups.com>
Message-ID: <c8db7584-1b9c-4fa9-a8b8-d8499e6eb6eb@c58g2000hsc.googlegroups.com>

On May 16, 10:21 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 9:41 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
> > > > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > > > ?? wrote:
> > > > > >     I wonder why below does not work.
>
> > > > > > a = object()
> > > > > > a.b = 1        # dynamic bind attribute failed...
>
> > > > > The implementation of slots depends on that behaviour:
>
> > > > >http://docs.python.org/ref/slots.html
>
> > > > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > > > Can you expand on that?
>
> > > > > Peter
>
> > > > Spirals are important.
>
> > > I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Python 3.0a5 (py3k:62932M, May  9 2008
> >  win32
> > Type "help", "copyright", "credits" or>>> import parser
> > >>> import compiler
>
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > ImportError: No module named compiler
>
> > Does anyone want to model mic-based soundwaves?  My recent project has
> > been color progression over time, and talking about compilers.- Hide quoted text -
>
> > - Show quoted text -
>
> Can 'compiler' come back in?  I want to build a compiler + exec.- Hide quoted text -
>
> - Show quoted text -

I am also talking about Mac.  I have this one:

		def click( self, *_ ):
			self.degrees+= 180

Looking entirely unapproachable.  Bartender?


From barisc at bckm.org  Tue May 27 05:03:11 2008
From: barisc at bckm.org (Baris-C)
Date: Tue, 27 May 2008 02:03:11 -0700 (PDT)
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
Message-ID: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>

On May 27, 2:32?am, Marc Pelletier <m... at stopspam.goldak.ca> wrote:
> Hello,
>
> I am just getting started in Python with the intention of tweaking an
> opensource wxPython project called Brewsta. I've been reading python
> documentation and the code, and its starting to make sense, but there seems
> to be an awful lot of boilerplate required to make such an application
> work.
>
> Are there any ides that help out? There seem to be lots of options, and
> I've been downloading like crazy, but nothing so far that stands out. Are
> there any tips or tutorials specific to doing gui development?
>
> cheers
>
> Marc Pelletier

i use eric on kde 3.5.9


From deets at nospam.web.de  Wed May 14 10:19:45 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 16:19:45 +0200
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
Message-ID: <690ap7F2u0ftdU1@mid.uni-berlin.de>

> An instance method works on the instance
> A Static method is basically a function nested within a class object
> A class method is overkill?

If anything, a static method is overkill. See it this way: *if* you for some
reason put a method into an enclosing context - isn't it worth having a
reference to that? 
 
> I can call a static or class method through either the class OR any
> instance of it. I've never designed a method that took advantage of
> the class name except in cases where I needed to extend a super class
> *but* even in this case, I didn't use the enclosing class name...
> 
> Whats the deal with class methods, why use them over anything else?
> What does a class method accomplish in at least one line shorter than
> anything else? Does it help reduce duplication or typing? I am at a
> lost for words that can shed at least *one* good reason to use them.
> 
> What is the one greatest reason to use them? A little syntax and
> explanation can go a long long way. I am failing to understand them so
> any help is really appreciated here!

There is not one greatest reason. They have their uses as e.g.
factory-methods for instances of the class. Or as e.g. registering
functions for notifications amongst instances of the class. In which case
writing

class Foo:

   @classmethod
   def register(cls, listener):
       cls.LISTENERS.append(listener)

is much more robust because you could rename Foo the way you like - register
won't be affected.

Diez






From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:32:00 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:32:00 +0200
Subject: "prove"
In-Reply-To: <mailman.770.1210254618.12834.python-list@python.org>
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <48240c00$0$7184$426a74cc@news.free.fr>

Lucas Prado Melo a ?crit :
> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

Why do you need the documentation ? Just fire up your python shell and 
hack a Q&D example:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> class Foo(object):
...     def bar(self):
...             print "in %s bar" % self
...
 >>> f = Foo()
 >>> Foo.bar(f)
in <__main__.Foo object at 0xb7dccd2c> bar
 >>> f.bar()
in <__main__.Foo object at 0xb7dccd2c> bar
 >>>



From howachen at gmail.com  Sun May 25 14:13:07 2008
From: howachen at gmail.com (howa)
Date: Sun, 25 May 2008 11:13:07 -0700 (PDT)
Subject: Beginner question
Message-ID: <f4fb9b71-847b-4e71-892b-952b2e0f8e6e@w5g2000prd.googlegroups.com>

Hi,

Just want to try mod_python but it is more complicated then I
expected...

I just followed the tutorial on: http://www.modpython.org/live/mod_python-2.7.8/doc-html/inst-testing.html


E.g.

URL = http://www.example.com/mptest.py

It return

ImportError: No module named mptest

1. If I removed addHandler mod_python .py and PythonHandler mptest, I
can see the SOURCE CODE

2. The PythonHandler mod_python.testhandler seems return correct
result, showing I am using python 2.4.3


any idea?

Thanks.


From castironpi at gmail.com  Tue May 13 06:33:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:33:58 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<d2586a08-5933-4523-a1f4-7554cc4aad95@t54g2000hsg.googlegroups.com>
Message-ID: <af6c02a1-fe7c-4f41-8de0-03def12f32f1@m45g2000hsb.googlegroups.com>

On May 13, 4:52?am, castiro... at gmail.com wrote:
> On May 13, 4:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
>
>
> > Dave Parker wrote:
> > > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> > >>Yes, I am trying to visualize something.
>
> > > If it is related to making furniture comfortable for humans, have you
> > > considered painting the furniture with thermochromic paint (
> > >http://en.wikipedia.org/wiki/Thermochromism)??It changes color in
> > > response to temperature, which in part is determined by how hard a
> > > body is pressed against it because close contact tends to trap heat.
> > > An evenly distributed color might indicated evenly distributed
> > > pressure.
>
> > Don't let yourself be irritated by castironpi - he's the virtual equivalent
> > of a mumbling mad man in this group. Ignorance serves best as remedy - and
> > I only see his postings being
> > quoted... a huge relief!)
>
> > Diez
>
> I hate to ignore work. ?Who is the non-virtual equivalent mumble?- Hide quoted text -

However, that's just the sunrise I would be talking about.  How are
the soft drinks here?  Does anyone else have a t.v.?  I don't like
mine or have one.



From zerge69 at gmail.com  Tue May 20 23:52:31 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Tue, 20 May 2008 20:52:31 -0700 (PDT)
Subject: Newbie In Python
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <597c5935-6647-4276-81f0-b30693d93ba2@k10g2000prm.googlegroups.com>

On May 20, 5:15 am, andrew.smith.... at gmail.com wrote:
> I have Heard About "Python" its a OOD Language. i have to Learn it
> where from i should start it.
> i have python compiler at linux Platform.
> anyone can suggest me about it.
>
> Thanks In advance.

I recommend Pyscripter
http://code.google.com/p/pyscripter/

It includes all the Python documentation and tutorial


From amat at kabsi.at  Thu May 22 17:51:26 2008
From: amat at kabsi.at (Andreas Matthias)
Date: Thu, 22 May 2008 23:51:26 +0200
Subject: Overloading __getitem__
Message-ID: <uf6hg5-ca9.ln1@buckbeak.hogwarts>

The following code doesn't run but I hope you get what I
am trying to do.


class my_dict (dict):

    def __getitem__ (self, key, crazy = False):
        if crazy == True:
            return 5 * self.get(key)
        else:
            return self.get(key)


foo = my_dict()
foo['a'] = 123

print foo['a']
print foo['a', crazy = True]


Is it somehow possible to overload __getitem__ with an additional
argument? Are there other possibilities to achiev this? Or is
the only solution to this to write a normal function call
`def my_get (self, key, crazy=False)'?


Ciao
Andreas


From banibrata.dutta at gmail.com  Mon May 12 02:52:59 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 12:22:59 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <3de8e1f70805112352j341a3cd2o34d0964499e86271@mail.gmail.com>

Found that SnakeSQL does implement DB2.0 API. However are there such
implementations for MySQL ?

On 5/12/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
>
> On 5/12/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>>
>> Banibrata Dutta ?rta:
>>
>>> Hi,
>>>  Again a noob question.
>>>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is
>>> it correct to conclude that there is no RDBMS agnostic, single/uniform DB
>>> access API for Python ?
>>> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>>>  How is the RDBMS change handled for solutions which need to work with
>>> different RDBMSs ??
>>>
>> http://www.python.org/dev/peps/pep-0249/
>>
>
>
> That appears to be only an API specification. Are there any implementations
> of that ?
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From wgumgfy at gmail.com  Fri May  9 01:38:44 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 22:38:44 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org>
Message-ID: <68i6b5F2soauaU1@mid.individual.net>

Sherman Pendley wrote:
> kodifik at eurogaran.com writes:
> >
> > > PLEASE DO NOT | :.:\:\:/:/:.:
> > > FEED THE TROLLS | :=.' - - '.=:
> >
> > I don't think Xah is trolling here (contrary to his/her habit)
> > but posing an interesting matter of discussion.
>
> It might be interesting in the abstract, but any such discussion, when
> cross-posted to multiple language groups on usenet, will inevitably
> devolve into a flamewar as proponents of the various languages argue
> about which language better expresses the ideas being talked about.
> It's like a law of usenet or something.
>
> If Xah wanted an interesting discussion, he could have posted this to
> one language-neutral group such as comp.programming. He doesn't want
> that - he wants the multi-group flamefest.

Not everyone follows language-neutral groups (such as comp,programming 
as you pointed out), so you actually reach more people by cross posting. 
This is what I don't understand - everyone seems to assume that by cross 
posting, one intends on start a "flamefest", when in fact most such 
"flamefests" are started by those who cannot bring themselves to 
skipping over the topic that they so dislike.

-- 
wg 




From dReEeMpOeVsEtT1H at IgSmail.com  Thu May 29 09:53:51 2008
From: dReEeMpOeVsEtT1H at IgSmail.com (deepest1)
Date: Thu, 29 May 2008 15:53:51 +0200
Subject: boost
Message-ID: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>

Hi everybody.

I'm trying to use boost, but just don't know how to set it up.

My os is winXP (installed on disk D).
Python is installed in D:\Python25
MigGW compiler is installed in D:\MinGW (i downloaded it because djgpp 
is making much more errors with bjam)

I have downloaded boost_1_35_0.zip and boost-jam-3.1.16-1-ntx86.zip,
extracted boost_1_35_0.zip to D:\Program Files (so I have now D:\Program 
Files\boost_1_35_0), extracted there bjam and used bjam in cmd:

bjam --build-dir="D:\Program Files\boost_1_35_0" --toolset=gcc stage

I got 12 failures and 8 warnings from this (other few hundrds were ok)


I'm now trying to compile World.cpp and use it from python


World.cpp:
--------------------------
#include "boost/python.hpp"
using namespace boost::python;

BOOST_PYTHON_MODULE(hello)
{
    class_<World>("World")
        .def("greet", &World::greet)
        .def("set", &World::set)
    ;
}


struct World
{
    void set(std::string msg) { this->msg = msg; }
    std::string greet() { return msg; }
    std::string msg;
};
--------------------------



When trying to compile it I get:
----------------------------
E:\Source>g++ World.cpp
World.cpp:1:28: boost/python.hpp: No such file or directory
World.cpp:2: error: `boost' has not been declared
World.cpp:2: error: `python' is not a namespace-name
World.cpp:2: error: expected namespace-name before ';' token
World.cpp:4: error: expected constructor, destructor, or type conversion 
before
'(' token
World.cpp:15: error: `std::string' has not been declared
World.cpp:15: error: ISO C++ forbids declaration of `msg' with no type
World.cpp:16: error: using-declaration for non-member at class scope
World.cpp:16: error: expected `;' before "greet"
World.cpp:17: error: expected `;' before "std"
World.cpp:17: error: using-declaration for non-member at class scope
World.cpp:17: error: expected `;' before "msg"
World.cpp: In member function `void World::set(int)':
World.cpp:15: error: 'struct World' has no member named 'msg'
----------------------------


What have i done wrong and what should have been done instead?

Thank you in advance. :)


From kccnospam at glenevin.com  Mon May 19 14:56:52 2008
From: kccnospam at glenevin.com (seanacais)
Date: Mon, 19 May 2008 11:56:52 -0700 (PDT)
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
Message-ID: <12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>

On May 19, 2:11 pm, Peter Otten <__pete... at web.de> wrote:
>
> There's some magic going on behind the scene which means that you have to
> create a Tkinter.Tk instance before you can start churning out StringVars:
>
> >>> import Tkinter as tk
> >>> v = tk.StringVar()
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 257, in __init__
>     Variable.__init__(self, master, value, name)
>   File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 188, in __init__
>     self._tk = master.tk
> AttributeError: 'NoneType' object has no attribute 'tk'>>> root = tk.Tk()
> >>> v = tk.StringVar()
> >>> v.set(42)
> >>> v.get()
>
> '42'
>
> Peter


I had the Tkinter import as

from Tkinter import * but I changed it to

import Tkinter as tk

and modified the creation of the root object to

root=tk.Tk()

I then had to change every instance of Menu, Label,
Button, and all Tkinter elements to be prefaced by
tk.  (so Button became tk.Button).  That kind of makes
sense to me.

However even after specifying StringVar is a tk type

	def initOPValues(self, OPname, dname):

		OPDefaults = {
			'Vval'  : 0,
			'Ival'  : 0,
			'Otemp' : 0
		}

		dname = dict((d,tk.StringVar()) for d in OPDefaults)
		for d in OPDefaults:
				dname[d].set(OPDefaults[d])


I still get a very similar error message

C:\Code\gui>tkinter.py
Traceback (most recent call last):
  File "C:\Code\gui\tkinter.py", line 169, in <module>
    ps.initOPValues(c, OPValues[c])
  File "C:\Code\gui\tkinter.py", line 54, in initOPValues
    dname = dict((d,tk.StringVar()) for d in OPDefaults)
  File "C:\Code\gui\tkinter.py", line 54, in <genexpr>
    dname = dict((d,tk.StringVar()) for d in OPDefaults)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
    Variable.__init__(self, master, value, name)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
Exception exceptions.AttributeError: "StringVar instance has no
attribute '_tk'"
 in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
0x00B7E418>> ignored


Thanks!

Kevin


From hdante at gmail.com  Thu May 22 00:36:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:36:15 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com>
Message-ID: <d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>

On May 22, 1:26?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
> >>> a = 1e16-2.
> > >>> a
> > 9999999999999998.0
> > >>> a+0.999 ? ? # gives expected result
> > 9999999999999998.0
> > >>> a+0.9999 ? # doesn't round correctly.
>
> > 10000000000000000.0
>
> ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> ?1e16-2 == 0x1.1c37937e07fffp+53
> ?1e16 == 0x1.1c37937e08p+53
>
> ?(that is, the hex representation ends with "7fff", then goes to
> "8000").
>
> ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> This is not a bug, it's a feature.

 I didn't answer your question. :-/

 Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
by default. So that's strange.

 The following code compiled with gcc 4.2 (without optimization) gives
the same result:

#include <stdio.h>

int main (void)
{
	double a;

	while(1) {
		scanf("%lg", &a);
		printf("%a\n", a);
		printf("%a\n", a + 0.999);
		printf("%a\n", a + 0.9999);
	}
}


From fred.sells at adventistcare.org  Tue May 20 09:46:16 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Tue, 20 May 2008 09:46:16 -0400
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <g0uec3$cai$1@news.al.sw.ericsson.se>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B090C@acesxch01.ADVENTISTCORP.NET>

or
for i in range(1,100):
  print ('fizz','','')[i%3] + ('buzz','','','','')[i%5] or i

> > 
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
> > 
> > for i in range(1,101):
> >     if i%3 == 0 and i%5 != 0:
> >         print "Fizz"
> >     elif i%5 == 0 and i%3 != 0:
> >         print "Buzz"
> >     elif i%5 == 0 and i%3 == 0:
> >         print "FizzBuzz"
> >     else:
> >         print i
> > 
> > 
> > is there a better way than my solution? is mine ok?
> 
> 


From mccredie at gmail.com  Thu May 29 17:54:50 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 29 May 2008 14:54:50 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <2837626a-0f01-456e-9d8f-cc98097d963e@d45g2000hsc.googlegroups.com>

On May 29, 2:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.
>
> Thanks,
> Nikhil

I a little confused by what you are trying to do, but:

Strings are iterable.

>>> for c in "hello":
...   print "look, a letter", c
...
look, a letter h
look, a letter e
look, a letter l
look, a letter l
look, a letter o

And indexable:

>>> "hello"[0]
'h'

And converting to a list is done like this:

>>> list("hello")
['h', 'e', 'l', 'l', 'o']

They also have some pretty nifty methods:

>>> "hello\r\nworld\r\nlets\r\nsplit\r\n".split("\r\n")
['hello', 'world', 'lets', 'split', '']

>>> "hello world".index('world')
6

>>> "hello world".index('l')
2
>>> "hello world".index('l', 2+1)
3
>>> "hello world".index('l', 3+1)
9
>>> "hello world".index('l', 9+1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: substring not found

Hopefully some of that helps.

Matt


From daveparker at flamingthunder.com  Wed May 28 11:09:42 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 08:09:42 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
Message-ID: <3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>

> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>
> So what does this do exactly if the set throws an error?

I think the catch should catch the error thrown by set, compare it to
0.1, the comparison will not return true because the error is not less
than 0.1, and so the go-to to tinyanswer will not be taken.

> Is the error
> message printed at the top level going to be telling you about the failed
> addition or the failed comparison?

I don't think there will be an error message at the top in the case
above, because I don't think the comparison should fail -- the
comparision will return that it is not true that the error is less
than 0.1.

> Why do you need the catch anyway, if a
> statement is just an expression why can't you just put the statement into
> parentheses?

Statements return values, but statements are not just expressions.
Statements are more about control-flow and side-effects; expressions
are more about returning values.  Putting a statement into parentheses
in a context where expressions are also allowed in parentheses is (or
can be) both lexically and visually ambiguous.  That's why C had to
resort to the confusing "=" vs "==" notation -- to disambiguate the
two cases.  The "catch" keyword unambiguously alerts the reader that
the parenthesis contain a statement (or a whole list of statements).

> For that matter, is there any way to distinguish between different errors
> and only catch particular ones?

I think the catch function should catch all of the errors (and the non-
error result if no error occured), so I think distinguishing the error
would have to come after.  Maybe something like:

Set result to catch(read x from "input.txt".).
If result = dividebyzeroerror then ... else throw result.

I'm open to alternate suggestions, though.

> You have a great opportunity to avoid making some of the same mistakes that
> Python is trying to get out of.

I'm sure that I'll make my own new and different errors. :)  However,
I really appreciate your comments because maybe I'll make fewer
errors.  Or at least, correct them faster.

On May 28, 7:52?am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > Catch also gives you a
> > single, uniform, syntactically unambiguous way to embed statements (or
> > whole statement lists) into expressions -- without causing the
> > syntactic problems of = statements in if statements or the obfuscation
> > of question mark notation, etc. ?For example:
>
> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>
> So what does this do exactly if the set throws an error? Is the error
> message printed at the top level going to be telling you about the failed
> addition or the failed comparison? Why do you need the catch anyway, if a
> statement is just an expression why can't you just put the statement into
> parentheses?
>
> For that matter, is there any way to distinguish between different errors
> and only catch particular ones? A bare except clause in Python is usually a
> signal of bad code: when handling errors you only want the errors you have
> anticipated, and want to be sure that any unexpected errors don't get
> caught.
>
> You have a great opportunity to avoid making some of the same mistakes that
> Python is trying to get out of. For example as of Python 2.5
> KeyboardInterrupt and SystemExit to longer inherit from Exception. That
> means a bare except in Python no longer catches either of those: if you
> want to handle either of these exceptions you have to be explicit about it.
>
> --
> Duncan Boothhttp://kupuguy.blogspot.com



From patrickstinson.lists at gmail.com  Thu May 22 20:09:17 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Thu, 22 May 2008 16:09:17 -0800
Subject: statically linking release build on mac
In-Reply-To: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>
References: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>
Message-ID: <6214d7a20805221709o330b2505mceac97d7267dab73@mail.gmail.com>

Here is the error:
code 4, error number 0 (Symbol not found: _Py_DebugFlag
  Referenced from: /Library/Application
Support/Digidesign/Plug-Ins/Play.dpm/Contents/MacOS/Play
  Expected in:
/System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
)

On Thu, May 22, 2008 at 10:13 AM, Patrick Stinson <
patrickstinson.lists at gmail.com> wrote:

> I get an error reporting an unfound symbol using a statically linked
> release build of python2.5 on a OSX-Tiger. This works fine on leopard, where
> the system default python is version 2.5.1 - the same version that I'm using
> to link to.
>
> Sorry, I'm currently screwing with my configs and don't have a build to run
> (my bad :) anymore, but the error is basically this:
>
> Undefined symbol: _PY_DebugFlag
> Referenced From: <my exe>
> Expected in: <core audio framework lib image location>
>
> I moved the system python frameworks out of the frameworks path for the
> build and run just to make sure that they weren't somehow getting in the
> way. I found that that symbol is defined in pydebug.h for both release and
> debug builds. Also, I discovered that I can fix the problem with some of my
> targets (I have both standalone exe and plugin lib versions of my app code)
> by referencing the variable directly like this: int mine = Py_DebugFlag,
> which fixes that symbol but then the next symbol in pydebug (PY_VerboseFlag)
> is reported as undefined. After some playing with it, I found that the
> following code will fix the problem in a basic standalone app:
>
>     int _________mine;
>     void *__________p = NULL;
>     _________mine = Py_DebugFlag;
>     _________mine = Py_VerboseFlag;
>     _________mine = Py_InteractiveFlag;
>     _________mine = Py_OptimizeFlag;
>     _________mine = Py_NoSiteFlag;
>     _________mine = Py_UseClassExceptionsFlag;
>     _________mine = Py_FrozenFlag;
>     _________mine = Py_TabcheckFlag;
>     _________mine = Py_UnicodeFlag;
>     _________mine = Py_IgnoreEnvironmentFlag;
>     _________mine = Py_DivisionWarningFlag;
>     _________mine = _Py_QnewFlag;
>     __________p = (void *) _PyOS_ReadlineTState;
>     __________p = (void *) PyOS_ReadlineFunctionPointer;
>
>
> Woah, don't I feel like the lib is jerking me around a little? Anyway, this
> works if I put it in main() for a standalone target, in a semi-random class
> constructor for the AudioUnit target, and I still can't find the right place
> to put it for the RTAS (
> http://www.digidesign.com/index.cfm?query=developers%20plugin_info%20rtas.cfm&langid=1)
> target. It's a little weird that I'm getting this at runtime and not at
> link-time since I'm linking statically.
>
> This is the standalone main() that works, but fails if I remove the above
> code:
>
> #include <Python.h>
>
> int main(int, char **)
> {
>   int mine = -1;
>   void *p = NULL;
>
>   mine = Py_DebugFlag;
>   mine = Py_VerboseFlag;
>   mine = Py_InteractiveFlag;
>   mine = Py_OptimizeFlag;
>   mine = Py_NoSiteFlag;
>   mine = Py_UseClassExceptionsFlag;
>   mine = Py_FrozenFlag;
>   mine = Py_TabcheckFlag;
>   mine = Py_UnicodeFlag;
>   mine = Py_IgnoreEnvironmentFlag;
>   mine = Py_DivisionWarningFlag;
>   mine = _Py_QnewFlag;
>   p = (void *) _PyOS_ReadlineTState;
>   p = (void *) PyOS_ReadlineFunctionPointer;
>
>   Py_Initialize();
>
>   Py_Finalize();
> }
>
>
> It seems to me like this might have something to do with setting up a
> symbol lookup table correctly or something, I don't know. I'm not having any
> problems with debug builds. This is the relevant part of my config.status.
>
> ac_cs_version="\
>
> python config.status
> 2.5
>
> configured by ./configure, generated by GNU Autoconf
> 2.59,
>
>   with options \"'--enable-universalsdk' '--disable-shared'\"
>
>
> Help? *whimper*.. Cheers.
>
>
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From upton at virginia.edu  Mon May 19 14:31:43 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 19 May 2008 14:31:43 -0400
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <5504f9ac0805191131x2d17e11dn36a97d33582caa78@mail.gmail.com>

On Sun, May 18, 2008 at 6:20 PM, John Salerno <johnjsal at nospamgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I write a lot of job control and process monitoring scripts in Linux.
Stuff that forks and execs processes, and then monitors procfs and
sysfs to collect periodic data.  I actually wouldn't mind doing a GUI
for it, but pretty much all of the data display I need from it I can
do by taking the data files and running them through gnuplot.  (That,
and I'm too lazy to figure out how to rewrite my telemetry plotter
from Java to Python.)

I guess I also write some data conversion programs, mostly the sort of
thing where I have a bunch of data that I didn't think far enough in
advance how I needed to be able to display it, so I just write
something to convert it to where I need it.  Incidentally, I used to
do that all in Java too, until other people in my research group
started making fun of me for it and also for not really knowing a
scripting language.


From inhahe at gmail.com  Thu May 22 14:01:04 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 14:01:04 -0400
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
	<b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>
Message-ID: <%viZj.78717$%15.59308@bignews7.bellsouth.net>

Might have a stack overflow issue, if it retries too many times?

"alex23" <wuwei23 at gmail.com> wrote in message 
news:b3680690-73c3-47cb-8693-54a207daafcd at x1g2000prh.googlegroups.com...
> On May 22, 6:15 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>> Because when you expect exception to occur on something like 0.01% of
>> cases, and you have 4 or 5 exceptions and the code to test for each
>> conditions that cause exceptions is quite long and burried deep inside
>> some other code it's much better to do it this way ;). Too bad there's no
>> syntactic sugar for doing this kind of try-except loop.
>
> I'm surprised your unit tests let it get to such a state... ;)
>
> How about something like this?
>
>    retry, total_fail = False, False
>    try:
>        some_function()
>    except SomeException:
>        some_function2()
>        some_function3()
>        retry = True
>    finally:
>        if retry:
>            try:
>                some_function()
>            except SomeException:
>                total_fail = True
>
> Using 'finally' seems more explicit about it being part of the
> exception handling than using a loop construct.
>
> Actually, this is even more direct:
>
>    try:
>        some_function()
>    except SomeException:
>        some_function2()
>        some_function3()
>        try:
>            some_function()
>        except SomeException:
>            raise SomeError 




From 1jamgold at gmail.com  Mon May 26 15:13:33 2008
From: 1jamgold at gmail.com (JAMGold)
Date: Mon, 26 May 2008 12:13:33 -0700 (PDT)
Subject: COMPUTER GEEKS AND $UCCE$$
Message-ID: <95eb87bd-b9b3-4e81-b8ed-d8e6f593f7ae@p25g2000pri.googlegroups.com>

Let's face it: We love computers, we love to be creative, we love to
show off our talents to as many
people as will watch, and we love to make money doing it.

So why don't more of us excel at the money-making? I know you have
looked at the sales page of an
internet marketing site and just shaken your head and said to
yourself, "I can do better than that!"

Perhaps you've come across a couple of good ones - real cornea poppers
- that make you wonder "How'd
they DO that? Do I have the software and know-how to make stuff like
that?"  You didn't care what they
were selling; you just drooled at the creative possibilities!

So, again, why don't more of us excel at money-making? What if I could
show you a way to do what you
love doing - creating websites, writing innovative code, developing
databases, et al - and make more
money than your boss?  Maybe more than your CEO? (Microsoft employees,
ignore that last! Bill's gonna
make more than you... sorry.)

What I want to do is revolutionize your perception of a much-maligned
and hated profession - internet
marketing! It's the perfect hand-in-glove fit for us computer geeks!
We get to play with automation,
with graphics, with programming and web design... All the elements
that combine to draw us into the
computer world are integral parts of a profession that could make you
thousands and thousands of
dollars a WEEK!

The hard part is getting started. Don't be fooled into thinking that
I'm offering you a get-rich-quick
scheme. It's a profession. I'm suggesting you invest the time and
effort it WILL take to learn a new
angle on what you already know how to do. But still, I'm offering you
a program that will transform
your life - it's THE ideal way to develop and showcase your skills and
abilities!

The training is live and interactive on the web. The owners and top
executives of this company are "in
the trenches" with you and are available to help you via live chat
rooms, personal phone calls (that's
right - you can call the CEO and talk to him on his personal phone!
You MS guys, can you do that?)
You'll be led by the hand step by step to a kind of financial freedom
your current J.O.B. (Just Over
Broke) will NEVER provide for you.

I want you to take a look at two sites:
http://shmyl.com/staqson
http://shmyl.com/nebqson

As you look at these sites and watch the videos, think about the edge
you have on everyone else that's
looking into this business. You already know a lot of the principles
that make internet marketers
successful! You just need to learn how to apply them, and WE WILL SHOW
YOU HOW!
Seriously, you'll be glad you looked into this.

Best regards and I'll see you at the top!

Wayne Hamrick
800 708-0069
Wayne at solutionsRus.ws


From timr at probo.com  Wed May 28 03:36:40 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 07:36:40 GMT
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
	<d371eade-7683-4007-8015-b752de2af6dd@34g2000hsh.googlegroups.com>
Message-ID: <tq2q345p0tfm2dlvrmcg7vur3s0vt7v42o@4ax.com>

eliben <eliben at gmail.com> wrote:
>
>I ended up using an ugly hack to make it work for me. Since
>handle_request() only blocks until a request is received, the thread
>can be unblocked by sending it a real message. So to stop a server, I
>opened a XML-RPC client connection (using ServerProxy from xmlrpclib)
>and made a request. In the server thread, handle_process() returned
>and the thread could see the flag requesting it to stop.
>
>There must be a better way ! Any ideas ?

Well, maybe it is a matter of personal preference, but I don't see anything
wrong with this approach.  If a thread is blocked waiting for a command,
what's wrong with sending it a "please commit suicide" command?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From Joshuajruss at gmail.com  Fri May 30 09:11:31 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Fri, 30 May 2008 06:11:31 -0700 (PDT)
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <0b040810-4764-4cb8-8a74-6e9b40829dc7@34g2000hsh.googlegroups.com>

On May 30, 8:24?am, Josep <papa... at gmail.com> wrote:
> I'm playing with an application framework (or kinda) that's developed
> with python, and it throws this error:
>
> > File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
> > ? ? sql = unicode(sql, self.Encoding)
> > LookupError: unknown encoding: utf_8_euro
>
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue. As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.
I've had nothing but problems ever since I upgraded to Hardy. I used
to be a die hard Ubuntu fan until recently. Maybe try a better OS

>
> My Python version is 2.5.2, Ubuntu Hardy .deb package.
>
> Thanks in advance for your help.
>
> --
>
> Josep S?nchez
> [papapep]
> ----------------------------------http://extralinux.net
> ----------------------------------
>
> ?signature.asc
> 1KDownload



From jonbutler88 at googlemail.com  Thu May 22 04:22:35 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Thu, 22 May 2008 01:22:35 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com>
Message-ID: <c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com>

On May 22, 2:40?am, alex23 <wuwe... at gmail.com> wrote:
> On May 22, 8:18 am, jonbutle... at googlemail.com wrote:
>
> > Sorry, im new to both python and newsgroups, this is all pretty
> > confusing. So I need a line in my __init__ function of my class? The
> > spider class I made inherits from HTMLParser. Its just using the
> > feed() function that produces errors though, the rest seems to work
> > fine.
>
> Let me repeat: it would make this a lot easier if you would paste
> actual code.
>
> As you say, your Spider class inherits from HTMLParser, so you need to
> make sure that you set it up correctly so that the HTMLParser
> functionality you've inherited will work correctly (or work as you
> want it to work). If you've added your own __init__ to Spider, then
> the __init__ on HTMLParser is no longer called unless you *explicitly*
> call it yourself.
>
> Unfortunately, my earlier advice wasn't totally correct... HTMLParser
> is an old-style object, whereas super() only works for new-style
> objects, I believe. (If you don't know about old- v new-style objects,
> seehttp://docs.python.org/ref/node33.html). So there are a couple of
> approaches that should work for you:
>
> ? ? class SpiderBroken(HTMLParser):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? pass # don't do any ancestral setup
>
> ? ? class SpiderOldStyle(HTMLParser):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? HTMLParser.__init__(self)
>
> ? ? class SpiderNewStyle(HTMLParser, object):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? super(SpiderNewStyle, self).__init__()
>
> Python 2.5.1 (r251:54863, May ?1 2007, 17:47:05) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.>>> html = open('temp.html','r').read()
> >>> from spider import *
> >>> sb = SpiderBroken()
> >>> sb.feed(html)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "C:\Python25\lib\HTMLParser.py", line 107, in feed
> ? ? self.rawdata = self.rawdata + data
> AttributeError: SpiderBroken instance has no attribute 'rawdata'
>
> >>> so = SpiderOldStyle()
> >>> so.feed(html)
> >>> sn = SpiderNewStyle()
> >>> sn.feed(html)
>
> The old-style version is probably easiest, so putting this line in
> your __init__ should fix your issue:
>
> ? ? HTMLParser.__init__(self)
>
> If this still isn't clear, please let me know.
>
> - alex23

OK, heres what I have so far:

#!/usr/bin/env python
from HTMLParser import HTMLParser
from urllib2 import urlopen, HTTPError

class Spider(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)
        self.found = []
        self.queue = []

    def handle_starttag(self, tag, attrs):
        try:
            if tag == 'a':
                if attrs[0][0] == 'href':
                    self.queue.append(attrs[0][1])
        except HTMLParseError:
            print 'Error parsing HTML tags'

    def parse(self, page):
        try:
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

    def crawl(self, site):
        self.queue.append(site)
        while 1:
            try:
                url = self.queue.pop(0)
                self.parse(url)
            except IndexError:
                break
            self.found.append(url)
        return self.found

if __name__ == '__main__':
    s = Spider()
    site = raw_input("What site would you like to scan? http://")
    s.crawl(site)

Still getting very odd errors though, this being the latest:

Traceback (most recent call last):
  File "spider.py", line 38, in <module>
    s.crawl(site)
  File "spider.py", line 30, in crawl
    self.parse(url)
  File "spider.py", line 21, in parse
    self.feed(urlopen('http://' + page).read())
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 124, in urlopen
    return _opener.open(url, data)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 381, in open
    response = self._open(req, data)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 399, in _open
    '_open', req)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 360, in _call_chain
    result = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 1107, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 1064, in do_open
    h = http_class(host) # will parse host:port
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/httplib.py", line 639, in __init__
    self._set_hostport(host, port)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/httplib.py", line 651, in _set_hostport
    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
httplib.InvalidURL: nonnumeric port: ''

Also could you explain why I needed to add that
HTMLParser.__init__(self) line? Does it matter that I have overwritten
the __init__ function of spider?

Thanks


From deets at nospam.web.de  Thu May  8 08:16:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 14:16:03 +0200
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <68g992F2sjmdqU1@mid.uni-berlin.de>

M?ta-MCI (MVP) wrote:

> Hi!
> 
>> I don't often feel like using this word
> 
> Look at languages like OCAML or F #

The point being? Yes, shockingly enough other languages have other syntax &
semantics.

Diez


From python at bdurham.com  Sat May  3 18:27:10 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sat, 03 May 2008 18:27:10 -0400
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <481c9223$0$34540$742ec2ed@news.sonic.net>
References: <mailman.465.1209746433.12834.python-list@python.org>
	<481c9223$0$34540$742ec2ed@news.sonic.net>
Message-ID: <1209853630.17819.1251260483@webmail.messagingengine.com>

Matimus and John,

Thank you both for your feedback.

Matimus: I agree with your analysis. I blame lack of caffeine for my
original post :)

Regards,
Malcolm


From notnorwegian at yahoo.se  Thu May 22 19:10:21 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 16:10:21 -0700 (PDT)
Subject: serach file for regexp, return if found?
Message-ID: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>

i want to search a document for a particular regexp and then store
that regexp to a file.

but search and match only returns matchobjects(what are those anyway?
i dont get what to do with them, do they contain true/false,
stringposition etc?)

how do i do:
for rows in file:
    print regexp.find  ## or something equiavlent


From bignose+hates-spam at benfinney.id.au  Thu May  1 21:31:15 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 11:31:15 +1000
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and
	'NoneType'
References: <mailman.440.1209688547.12834.python-list@python.org>
Message-ID: <87fxt11ogs.fsf@benfinney.id.au>

"Jordan Harry" <jharry at EmeryWeiner.org> writes:

> I'm trying to write a simple program to calculate permutations. I
> created a file called "mod.py" and put the following in it:
>  
> def factorial(n):
>     a = n
>     b = n
>     while a>0 and b>1:
>         n = (n)*(b-1)
>         b = b-1

A function that does some calculations internally, but has no 'return'
statement and thus implicitly returns 'None'.

> def perm(n, r):
>     a = factorial(n)
>     b = factorial(n-r)

These statements bind the 'None' returned by the 'factorial' function
to the names 'a' and 'b'.

>     q = a / b

This attempts to use the '/' operator on 'None' with 'None', which
raises the exception you saw.

(good sigmonster, have a cookie)

-- 
 \         "Pinky, are you pondering what I'm pondering?" "I think so, |
  `\    Brain, but Zero Mostel times anything will still give you Zero |
_o__)                               Mostel."  -- _Pinky and The Brain_ |
Ben Finney


From hniksic at xemacs.org  Fri May  2 04:24:48 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 02 May 2008 10:24:48 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com> <7xbq3pjhav.fsf@ruckus.brouhaha.com>
Message-ID: <87bq3pglkf.fsf@mulj.homelinux.net>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> AlFire <spamgrinder.trylater at ggmail.com> writes:
>> But I still can not believe that +=1 is not a thread safe operation.
>
> In CPython I believe it is thread safe, because of the global
> interpreter lock.  Thread switches can happen only between bytecode
> executions, not in the middle of a bytecode, even though executing a
> bytecode can take several machine instructions.

It's safe when writing extensions in C (because of the GIL), but not
when writing Python code.  Python switches threads after a number of
bytecode instructions, so Python code behaves somewhat like C
multithreaded code on a single CPU -- although there is no true
parallelism, you still have context switches at arbitrary places to
worry about, and still need locks because of them.  Since the +=
operator is not compiled into a single bytecode instruction, it needs
the lock.  x+=1 gets compiled into the following bytecode:

  3           0 LOAD_GLOBAL              0 (x)
              3 LOAD_CONST               1 (1)
              6 INPLACE_ADD
              7 STORE_GLOBAL             0 (x)

If two threads execute that code simultaneously, a thread switch could
easily occur some time between LOAD_GLOBAL and STORE_GLOBAL, causing
the variable to be incremented by 1 instead of by 2.


From skanemupp at yahoo.se  Wed May  7 17:47:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:47:36 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <81addfb5-254f-4a2b-a2bc-044592cee07f@p25g2000hsf.googlegroups.com>

and what si the diffrence here:

g = lambda x=5:x*x
g = lambda x:x*x

the first was a mistake to write but it worked
and the x=5 seems to be completely ignored. why? it has no effect at
all?


From stevegill7 at gmail.com  Sun May  4 00:33:45 2008
From: stevegill7 at gmail.com (Jetus)
Date: Sat, 3 May 2008 21:33:45 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
Message-ID: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>

Is there a good place to look to see where I can find some code that
will help me to save webpage's links to the local drive, after I have
used urllib2 to retrieve the page?
Many times I have to view these pages when I do not have access to the
internet.


From istvan.albert at gmail.com  Thu May  1 08:46:51 2008
From: istvan.albert at gmail.com (Istvan Albert)
Date: Thu, 1 May 2008 05:46:51 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>

On Apr 29, 3:51 am, "Zed A. Shaw" <zeds... at zedshaw.com> wrote:

> You can grab the most recent draft of the book at:
>
>  http://zedshaw.com/projects/vellum/manual-final.pdf

> However, I'm curious to get other people's thoughts.

IMO if you would refrain from using swear words in the manual it would
help broadening its reach and acceptance.

i.


From martin at v.loewis.de  Sat May 10 06:21:02 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 12:21:02 +0200
Subject: Pythonicity of some algorithms
In-Reply-To: <mailman.898.1210413757.12834.python-list@python.org>
References: <mailman.898.1210413757.12834.python-list@python.org>
Message-ID: <4825770e$0$25961$9b622d9e@news.freenet.de>

> This works for me. But I'd like to know if this is considered
> Pythonic, and if there are other, better ways of doing the above in
> Python.

>From the Python point of view, it's fine. However, it uses busy-wait,
which I consider bad style (in any language).

> 3) Make a custom thread-safe queue class, with an 'interrupt_get'
> method. When your app calls queue.interrupt_get(), all threads
> currently locking on a queue.get() will continue, but with a
> GetInterrupted exception thrown.

That's what I would do. I'd use the existing Queue class as a base
class, though, rather than starting from scratch.

Regards,
Martin


From johnjsal at NOSPAMgmail.com  Tue May 27 14:08:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 27 May 2008 14:08:14 -0400
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>
Message-ID: <483c4f26$0$7278$c3e8da3@news.astraweb.com>


"Paul McGuire" <ptmcg at austin.rr.com> wrote in message 
news:74d9c37f-807c-4aae-8ad5-db79bb3e2bd2 at 8g2000hse.googlegroups.com...
On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:

My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
about for "python hungarian notation" led me through some like-minded
sites.  But I also found this entry on Joel Spolky's site (http://
www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
warns against tarring all Hungarian-type notations with the same
brush.

Wow, that was fascinating. I had no idea Hungarian notation originally 
didn't mean to prefix the object type! 




From eckhardt at satorlaser.com  Tue May 20 04:54:08 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Tue, 20 May 2008 10:54:08 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
Message-ID: <g6gag5-u3e.ln1@satorlaser.homedns.org>

Asun Friere wrote:
> Well you have to be careful in case some smartarse comes back with a
> class with something like this in it:
> 
> def __eq__ (self, other) :
>     if self is other : return False

That's pretty paranoid. :)
Who said that? (:

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From afilash+python at gmail.com  Fri May 30 12:50:15 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Fri, 30 May 2008 22:20:15 +0530
Subject: how can i stop script from running on login ?
In-Reply-To: <ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>
References: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
	<ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>
Message-ID: <9f9d35df0805300950o5fc9767id9ba6400ac5f6a08@mail.gmail.com>

thanks Benjamin, i have to try it out

On Fri, May 30, 2008 at 6:31 PM, Benjamin Kaplan <benjamin.kaplan at case.edu>
wrote:

>
>
> On Fri, May 30, 2008 at 8:44 AM, abhilash pp <afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
> wrote:
>
>> Hi all,
>>
>> One of my friends played some tricky thing, and now I am in great trouble,
>> please help
>> Here is the scenario  [windows xp ]:
>>
>> He wrote one login script and put it on the start program folder under
>> 'All Users'
>> The script is like this it will issue a log off command when we login; due
>> to this I am not able to login to my system even he himself not able to
>> access the system and solve the problem. The main thing is the script is of
>> '.pyw' type so I can't able to close the CMD window to stop this script
>>
>> How can I remove that script? Any help will be appreciated, thanks in
>> advance
>>
>> Abhilash
>>
>>
> Try running the machine in safe mode, then delete the script.
>
>
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From torriem at gmail.com  Thu May  1 13:10:57 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 11:10:57 -0600
Subject: Stream I/O to a java applet (os.popen?)
In-Reply-To: <B8C92AA3C7F77B4D9042166511E2089301252746@nbss01.NBSS.NBED.NB.CA>
References: <B8C92AA3C7F77B4D9042166511E2089301252746@nbss01.NBSS.NBED.NB.CA>
Message-ID: <4819F9A1.1020109@gmail.com>

Cody Woolaver wrote:
> This is all done at the terminal though and i need to have it done through a python file. I'm aware that i will have to use os.popen but am unfamiliar with how it works.

You'll probably want to look at the subprocess module, which replaces
the old os.popen stuff.  It's also a bit better at running on Windows.
There are lots of docs and examples relating to subprocess.  Probably
some good recipes too, especially for running on windows.  I'd begin by
looking on google for "python subprocess example windows."

Bear in mind interactive control of a subprocess is sometimes fraught
with difficulty, as it's easy to deadlock if you're waiting for the
subprocess to say something and it's waiting for you to say something.

On another track, you might want to consider using Jython, as it will
allow your python class file to interact directly with the Java stuff,
rather than having to do it via pipes and subprocesses.  The only
downside to Jython currently is it's stuck at Python 2.2 stuff.  But
it's a nice integration of Java and Python.


From arnodel at googlemail.com  Fri May 16 11:42:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 16:42:17 +0100
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
	<781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>
Message-ID: <m28wya8dd2.fsf@googlemail.com>

afrobeard <afrobeard at gmail.com> writes:

> Arnaud's code wont work if self.opt1 is None, an empty list, an empty
> tuple, False, etc, because all these evaluate to false. They wont
> print the internal state of these variables. [Just an informational
> notice, this may be the behavior you expect]

??? My suggestion is to get rid of attributes altogether and does not
test any truth values.

> Secondly, I'm not sure if you know the variable names from before hand
> in which case Casey's approach will work, or you need to know them via
> introspection. http://www.ibm.com/developerworks/library/l-pyint.html
> [Scroll down to attributes].
>
> On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Casey <casey.mcgi... at gmail.com> writes:
>> > Hi,
>>
>> > I have some classes that print variable outputs depending on their
>> > internal state, like so:
>>
>> > def __str__(self):
>> > ? ? out = []
>> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
>> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
>> > ? ? ....
>> > ? ? return '\n'.join(out)
>>
>> > Is there any way to make this cleaner?
>>
>> Maybe.
>>
>> Have a dictionary of options rather than individual attributes;
>> options not in the dictionary are not set. E.g.
>>
>> mask = {
>> ? ? 'opt1': 'option 1 is %s',
>> ? ? 'opt2': 'option 2 is %s',
>> ? ? ...
>> ? ? }
>>
>> def __str__(self):
>> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>>
>> --
>> Arnaud


From deets at nospam.web.de  Mon May  5 08:37:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 14:37:23 +0200
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <688dctF2rnddhU1@mid.uni-berlin.de>

globalrev wrote:

> class Foo(object):
> def Hello(self):
> print "hi"
> 
> object is purple, ie some sort of reserved word.

It is not.
 
> why is self in black(ie a normal word) when it has special powers.
> replacing it with sel for example will cause an error when calling
> Hello.

That must be some other problem. This is perfectly legal python code and
works:

class Foo(object):
    def bar(imafancyobject):
        print imafancyobject

f = Foo()
f.bar()

Diez


From gagsl-py2 at yahoo.com.ar  Mon May 26 20:34:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 21:34:51 -0300
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
Message-ID: <op.ubsekd05x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 20:32:58 -0300, Marc Pelletier  
<marc at stopspam.goldak.ca> escribi?:

> I am just getting started in Python with the intention of tweaking an
> opensource wxPython project called Brewsta. I've been reading python
> documentation and the code, and its starting to make sense, but there  
> seems
> to be an awful lot of boilerplate required to make such an application
> work.

That's strange - usually you don't require "an awful lot of boilerplate"  
in Python.

> Are there any ides that help out? There seem to be lots of options, and
> I've been downloading like crazy, but nothing so far that stands out. Are
> there any tips or tutorials specific to doing gui development?

I'm unsure if you're looking for a development environment like these:
http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
or an interface designer for wxPython (see the bottom part of  
http://wiki.python.org/moin/GuiProgramming)

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Fri May 23 15:24:41 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 12:24:41 -0700 (PDT)
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com> 
	<mailman.1510.1211558125.12834.python-list@python.org>
Message-ID: <3ab520b0-fd25-4026-9749-12bf06bfa6ab@p25g2000hsf.googlegroups.com>

On May 23, 11:42 am, Thomas Karolski <Thomas.Karol... at googlemail.com>
wrote:

> > You will note that Decorator does not define __init__.  In fact,
> > object.__init__ will be called, which does nothing.  If you think that
> > all classes with DecoratorType as their metaclass will be a direct
> > subclass of Decorator, you can get away with not calling
> > Decorator.__init__ at all.
>
> Now, inside my new version, I have a class which inherits from both
> Decorator and Window, out of which the __init__ for Decorator is not
> called. Does this prove to be a problem?

It sounds like it could create infinite recursion.  If your decorated
class inherits from Decorator, it should also get the DecorateType
metaclass, which should recursively try to create its own decorated
class, ad infinitum.  Unless I misunderstand what you meant.


> > Probably the best piece of advice is "Don't try to use Decorator
> > pattern".  :)
>
> Well, I decided on the decorator pattern, because I want to be able to
> change the behavior of classes during run-time. I did not really find
> any other pattern which would let me do that.


Ah.

Well it is possible to do that in Python. though there's probably not
an official design pattern for it (but then design patterns grew up
around less flexible languages, partially as a way to cope with their
lack of flexibility).  Here are a couple things to think about:

If you'd like to change the behavior of individual instances of a
class, you can assign functions to individual instances which act just
like methods.  (Warning: this does not work with operators.)

Here is an example:

    class A(object):
        def say_hello(self):
            print "hello, world"

    a = A()

    def custom_hello():
        print "hello, my name is Inigo Montoya"

    a.say_hello = custom_hello


If you'd like to change the behavior of all instances of the class,
then you can assign a new method directly to the class after it was
created:

    def new_default_hello(self):
        print "hello, children"

    A.say_hello = new_default_hello


Notice that you need to use self when assigning it to the class
object, and not to use self when assigning it to an instance of the
class.


Carl Banks


From cjw at ncf.ca  Mon May 12 11:04:15 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Mon, 12 May 2008 11:04:15 -0400
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <482855df$0$14196$9b622d9e@news.freenet.de>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
	<482855df$0$14196$9b622d9e@news.freenet.de>
Message-ID: <g09m9n$c8h$1@theodyn.ncf.ca>

Martin v. L?wis wrote:
>> 1.I have both 2.5 and 2.6 but both appear, under Recent Projects, as
>> pcbuild.  It would be helpful if the Python Version could be indicated.
> 
> Hover over the link, and it will display the full path, which you can
> then infer to reason about the specific copy of Python you are using.

Lovely, thanks.  It's at the bottom of 
the screen.

> 
> In any case, compiling Python 2.5 with VS 2008 is not supported.
> 
>> 2.With 2.6, Python compiles and executes OK but various packages are not
>> compiled, eg sqlite3.
> 
> See PCbuild/readme.txt.

I presume that this is PCbuild8.txt

> 
>> 3.Pythonw compiles OK but not sqlite3.
> 
> So what's the error?
> 
>> 4.Mike Fletcher suggests an approach
>> (http://www.vrplumber.com/programming/mstoolkit/) with Visual C for
>> Python 2.4.  Is this still the recommended way to compile Python 2.6?
> 
> No. Either use the full product, or the express edition. Neither
> requires and additional setup.
> 
>> 5.Python 2.5 source refers to an Older Visual C.  Automatic conversion
>> to Visual C 2008 gives the message ?Some of the properties associated
>> with the solution could not be read.?  All projects except one had a
>> single warning, there were no errors reported.
>> 6.After conversion there is no python project, it is flagged ?unavailable?.
> 
> See above. This procedure is not supported; you are on your own.
> Get a copy of VS 2003 if you want to follow the official
> recommendations.
> 
>> 7.Pythoncore builds with no errors and 6 warnings but there is no
>> executable.
>> 8.Python 2.5 build _tkinter fails ? tcl.h not found.
> 
> See PCbuild/readme.txt.
> 
> Regards,
> Martin

Thanks.  I'll look at the readme more 
carefully and seek VS 2003.

Now, I would like to remove Python 2.5 
from VS 2008 but see no obvious way of 
getting rid of it.

Colin W.


From lists at cheimes.de  Thu May  1 08:07:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 14:07:53 +0200
Subject: Is vs Equality Operator
In-Reply-To: <706397.16040.qm@web35903.mail.mud.yahoo.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <4819B299.9090903@cheimes.de>

Good Z schrieb:
> Hello, 
> I am having problem in using is. Here is what i am doing.
> 
> x=''
> if x is None or x is '':
>         return 1
> 
> The above statement does not return value 1.
> 
> If i changed the above check to 
> if x == None or x == '':
>         return 1
> Now it works fine.
> 
> Any idea. What is happening here. I am using python 2.4.4 on ubuntu.

Never use the identity operator "is" on strings and numbers! In most of
the cases it won't do what you are expecting.

The behavior can be explained with with a simple analogy. You have a
street with a STOP sign on both ends. The stop sign on the near end is
equal to the stop sign on the far end. Both have the same form, colors
and meaning. The stop signs are also equal to every other stop sign in
your town. However the stop signs are NOT identical. They occupy two
different places and they are made from two totally different sets of atoms.

When you want to know if the stop sign on the near end is a stop sign,
you have to use the equality == operator. But if you want to check if
you are referring to exactly the one and only stop sign at the near end
of your road and no other sign in the universe you have to use 'is'.

HTH

Christian



From marco at sferacarta.com  Mon May 12 04:47:49 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 10:47:49 +0200
Subject: module global variables
In-Reply-To: <a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
Message-ID: <VuTVj.40306$o06.27577@tornado.fastwebnet.it>

pistacchio wrote:
> On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
>> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>>
>>> hi to all!
>>> can i load a module passing to it, automatically and as default, all
>>> the caller's global variables to act as module's global variables?

Are you positively sure you need this?

Modifying imported modules is already quite fragile, but this.. it's 
basically a reversed(import *)

It's quite messy. Where quite equals to "very"


From hdante at gmail.com  Thu May 22 00:26:32 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:26:32 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com>

On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>>> a = 1e16-2.
> >>> a
> 9999999999999998.0
> >>> a+0.999 ? ? # gives expected result
> 9999999999999998.0
> >>> a+0.9999 ? # doesn't round correctly.
>
> 10000000000000000.0

 Notice that 1e16-1 doesn't exist in IEEE double precision:
 1e16-2 == 0x1.1c37937e07fffp+53
 1e16 == 0x1.1c37937e08p+53

 (that is, the hex representation ends with "7fff", then goes to
"8000").

 So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
This is not a bug, it's a feature.


From daraburke78 at gmail.com  Tue May 20 06:26:53 2008
From: daraburke78 at gmail.com (dbee)
Date: Tue, 20 May 2008 03:26:53 -0700 (PDT)
Subject: Report Lab Image Flowable Issue ..
Message-ID: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>

I'm try to generate a report that will span multiple pages and have
dynamic content using python reportlab. I have no issues with regards
to generating images and then using     p.drawInlineImage(signup_img,
100,150)  to draw them onto the canvas.

The problem that i have comes when i try to create flowables so that
my layout can span multiple pages. The images themselves never
actually show up on the page ...

    # Import pdf
generator
    from cStringIO import StringIO
    from reportlab.pdfgen import canvas
    from reportlab.pdfgen.canvas import Canvas
    from reportlab.lib.styles import getSampleStyleSheet
    from reportlab.lib.units import inch
    from reportlab.platypus import Paragraph, Frame
    from PIL import Image

    # Create the HttpResponse object with the appropriate PDF
headers.
    response = HttpResponse(mimetype='application/pdf')
    response['Content-Disposition'] = 'attachment;
filename=somefilename.pdf'

    buffer = StringIO()

    styles = getSampleStyleSheet()
    styleN = styles['Normal']
    styleH = styles['Heading1']
    story = []

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(Paragraph("""This is a paragraph in <img src='http://
images.google.com/intl/en_ALL/images/images_hp.gif' width='200'
height='200' /> style"\
"",styleN))

    c = Canvas(buffer)
    f = Frame(inch, inch, 6*inch, 9*inch, showBoundary=1)
    f.addFromList(story,c)
    c.save()

    # Get the value of the StringIO buffer and write it to the
response.
    pdf = buffer.getvalue()
    buffer.close()
    response.write(pdf)

This should generate a pdf with the google image in it no ? The pdf
gets generated but no image comes out.

When I try the other option of using image flowables, I get only an
error. The reportlab docs example shows an Image flowable being called
like ... Image("lj8100.jpg")   .... but when i try to call the object
directly i get an error which suggests that i should use Image.new or
Image.open to call the object ...

    # Create image from /tmp
    im = Image("/tmp/car_dealership.jpg", width=2*inch, height=2*inch)
    im.hAlign = 'CENTER'

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(Image(im))

TypeError: 'module' object is not callable for the im = Image( ....)

When i try to feed the image manually ...

    interest_image = interests_barchart(request)
    im = Image.open(StringIO(interest_image.content))

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(im)

I get ... AttributeError: getSpaceBefore    ... which seems to suggest
that im isn't a flowable ...

Can anyone help pls ?


From pavlovevidence at gmail.com  Thu May  1 19:32:00 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 16:32:00 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
Message-ID: <071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>

On May 1, 4:50 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:
> > On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> >> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
> >> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> >> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> >> > IMO .ini-like config files are from the stone age. The modern
> >> >> > approach is to use YAML (http://www.yaml.org).
>
> >> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> >> >> and so comprehensively and completely fails to achieve its stated
> >> >> main goal of being "readable by humans", that I had assumed it was
> >> >> an April Fool along the lines of Intercal or brainf***.
>
> >> > YAML, ISTM, took a simple concept that worked for small,
> >> > straightforward data, and tried to make into a format that could
> >> > anything anywhere, with disastrous results.  It's not unlike Perl in
> >> > this regard.  It's quite ridiculous.
>
> >> > My recommendation to the OP would be:
>
> >> > If you intend to write a GUI that completely sets all the options,
> >> > use XML.  You can bet there are some users who would prefer text
> >> > editing options files, and XML, while not the most readable format
> >> > available, at least gives users the option.
>
> >> > If you don't intend to write a GUI to do that, write a simple text
> >> > file parser (if the options are simple), use ConfigParser, or use a
> >> > Python file that you exec.
>
> >> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> >> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
> >> > using the Windows registry to store options; use it to modify Windows
> >> > behavior (like file associations) but keep your own program's options
> >> > in your own file.
>
> >> If you don't like YAML, use JSON or something similar -- XML is
> >> overkill and .INI is too limited.
>
> > I don't think you know the OP's requirements enough to know whether INI
> > or XML is suitable. You're welcome to suggest alternatives but what I
> > suggested is fine.
>
> > As for XML being overkill for anything, I highly disagree. XML is
> > suitable for the smallest tasks.  These days I use XML for almost all my
> > data exchange needs: including conf files.  Elementtree makes it
> > possible to process XML and pull out some typical data in ten or so
> > lines of code.  What could possibly be overkill about that?
>
> > Carl Banks
>
> I used XML for almost everything in the past until I found YAML.
> Elementtree makes it easy but not easy enough.

I'm honestly very happy for you that you have found the data transfer
format that you are happy with, but I'm sorry, that doesn't amount to
a blanket invalidation of everything you've ever tried and rejected.


> The most powerful thing
> about YAML is that it was designed to map directly to native data types
> in languages like Python (see another my post in this thread for
> example). And this means that simple YAML files will always be easier to
> process in Python than XML or INI. And this in turn means that OP with
> any requirements will have to write less code to read and write his
> config files.

I will mention that Python already has, built in, a data transfer
format that maps directly to Python types: pickle.

And not only that, it's more readable than YAML.


I will also add that what you think of as a strength is not always
thought of as a strength by everyone.  In my early days of Python, I
would use pickle for all kinds of things.  I've now pretty much
switched entirely to XML, because I no longer believe that direct
correspondance to Python types is a good thing; at least it isn't for
me.  There is a very basic reason for this: whenever I write a pair of
tools, one to output some XML data, and another further down the chain
to read it back in, I hardly ever want the data to have the same
structure in memory in both tools.  For me, YAML or pickle would not
gain me anything; I'd be doing all that reformatting anyway.


Of course, the OP wasn't talking about data transfer, he was talking
about a freaking config file.  Reading in a config file is a
ridulously silly thing to try to hyperoptimize.  Do you really want
him to add an extra dependency just to reduce code used by five lines?


Carl Banks


From erik.oosterwaal at gmail.com  Sun May 25 12:58:55 2008
From: erik.oosterwaal at gmail.com (erik.oosterwaal at gmail.com)
Date: Sun, 25 May 2008 09:58:55 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
Message-ID: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>

Hi All,

I have been developing websites in classic asp using VB script for a
long while now. Due to the fact that I also took a detour to
developing ColdFusion, and the fact the companies I work(ed) for never
had time or money for courses, I am now in the awkward position that I
am -still- developing classic ASP.

In it, I have become quite resourceful, I wrote a framework using WSC
(windows scripting components) to separate logic from presentation,
and my display pages use almost no logic, except for the loops and
variables I need to build my pages. I have a three-tier setup and all
business logic is in separate WSC files. The framework even uses an
ORM for access to the tables of my database. This works like a charm.
It makes classic ASP code maintainable, it makes working in classic
ASP very pleasant actually and it makes our customers very happy.

The problem is that classic asp is now a dead language, I need to
modernize and fast! Although the arguments some people make against it
are not valid for me (spaghetti code, unmaintainable, slow), I still
see that there is little to no support for it anymore.

The most logical way to "update" my knowledge to something more
modern, would be to dive into ASP.NET. I considered that for a long
time, but there are some problems with this:

1. I love the control I have over my html using inline, template-based
vbscript. ASP.NET's web forms really sound like a very bad idea, also
the approach Microsoft takes in trying to make a stateless web-app
seem like a statefull application is IMHO a burden. I think webapps
are inherently different than desktop apps, and should be programmed
as such.

2. Who says Microsoft isn't going to pull the plug on VB.NET in a
while or make a drastic change like they did from asp to asp.net
again, some time in the future?

3. I like the rapid development I can do in a dynamic, loosely typed
language like vbscript. The performance-bottleneck of a site is mostly
in the database-access and the http-calls and I think writing all of
the declarations and types for a strong-typed language is overkill for
a webapp.

So that's when I started looking at other dynamic languages for
webdevelopment. I looked at Ruby on Rails and at the different web-
frameworks that are available for Python. The biggest problem there
for me is that the MVC type frameworks that are currently very popular
are also not what I'm looking for.

I like having my directory tree conform to the structure of my
website, so the "Controller" part of the MVC style of development is
something I wouldn't want. What I -would- like is a separation of code
and display logic (so being able to include libraries in a page) and
being able to intermix code directly into the HTML.

As Python would be the language I prefer over Ruby, I thought I'd ask
here to see if anyone in the Python community knows if such a
development-framework exists in Python. For example, does IronPython
also use the same web forms approach as asp.net using VB? The
frameworks I looked at (Django, Pylons) seem to be able to use
different templating engines, does that mean it's just a question of
finding the right one?

Also, for Python there is also the problem of meaningful indentation.
I'm not even sure if it's possible to use Python directly inside HTML,
because indentation would be at the very least tricky to maintain. I'm
kind of hoping here that there are some solutions to these problems
available in Python.

 Any help would be greatly appreciated.

Kind regards,

Erik


From efurman at admailinc.com  Wed May 14 13:17:00 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 14 May 2008 09:17:00 -0800
Subject: built in list generator?
In-Reply-To: <87hcd14vo0.fsf@benfinney.id.au>
References: <87hcd14vo0.fsf@benfinney.id.au>
Message-ID: <482B1E8C.1010800@admailinc.com>

Ben Finney wrote:

> Subject:
> Re: built in list generator?
> From:
> Ben Finney <bignose+hates-spam at benfinney.id.au>
> Date:
> Wed, 14 May 2008 09:43:43 +1000
> To:
> python-list at python.org
>
> To:
> python-list at python.org
> Newsgroups:
> comp.lang.python
>
>
>"Diez B. Roggisch" <deets at nospam.web.de> writes:
>
>  
>
>>globalrev schrieb:
>>    
>>
>>>if i want  a list with all numbers between x and y is there a way to
>>>do this with an inbult function.
>>>
>>>i mean i can always construct a function to do this but is there
>>>soemthing like:
>>>
>>>nbrs = list(range(50,100, 2))
>>>      
>>>
>>range *does* that. use xrange if all you want is to iterate.
>>    
>>
>
>Until Python 3.0, where 'range' returns an iterable.
>  
>
Is there a thread somewhere of the discussion for this change?  I'm 
presuming range is used almost exclusively in loops where a change in 
the return type would have no negative effect.
--
Ethan
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From ohad.frand at percello.com  Mon May 12 13:27:10 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Mon, 12 May 2008 20:27:10 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>

Hi

I am looking for a way to programmically get a list of all python
existing statements that I cannot access by __builtins__ or locals() 

(like ["assert","break","class",...])

 

Thanks,

Ohad

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From workitharder at gmail.com  Wed May 21 20:14:07 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:14:07 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
	<d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>
Message-ID: <f564d6f5-a6cf-45de-986e-eac1f2aaae04@r66g2000hsg.googlegroups.com>

On May 21, 3:28 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 4:21 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > Which is exactly what the python decimal module does.
>
> Thank you (and Jerry Hill) for pointing that out.  If I want to check
> Flaming Thunder's results against an independent program, I'll know to
> use Python with the decimal module.

Utterly shameless.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:31:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:31:42 -0300
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
Message-ID: <op.ua1d64myx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.fremiot at gmail.com> escribi?:

> I'm currently working on python embedding with C++. My goal is that
> the C++ part handle files writing/reading so that the Python part only
> works with buffers.
>
> I succeeded in buffer exchanges. The problem is that some of the files
> I read/write are python files so that, before embedding, I imported
> them as modules when I needed them.
>
> But now that the Python part only receive buffers, I can't do it
> anymore. So I wonder :
> - is it possible to import module from a buffer instead of files?
> - or is it possible to create a module object from my buffer?

Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c

-- 
Gabriel Genellina



From bj_666 at gmx.net  Sat May 17 00:57:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 17 May 2008 04:57:24 GMT
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <6976tkF31cvenU1@mid.uni-berlin.de>

On Sat, 17 May 2008 04:01:50 +0000, Ivan Illarionov wrote:

> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
> 
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

*The* use case IMHO are alternative constructors.  They belong to the
class, so functions are not as clear and it's possible to have more than
one class in a module with class methods of the same name, e.g.
`A.from_string()` and `B.from_string()` vs. `create_a_from_string()` and
`create_b_from_string()`.

And I don't see how functions can be inherited by sub classes like class
methods can.

Metaclasses are more clear than class methods?  You must be joking!?

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.

Writing meta classes just for alternative constructors seems to be more of
a mess to me.  Too much magic for such a simple case for my taste.

Ciao,
	Marc 'BlackJack' Rintsch


From timr at probo.com  Wed May 28 02:04:54 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 06:04:54 GMT
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <5dtp34thl4a0ipeb5lm550uslud0jhpvua@4ax.com>

Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>> 
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>> 
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>...
>No. Language does matter.

A good programmer keeps many tools in his toolbox, and understands which
tools provide the best service for the problem at hand.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From castironpi at gmail.com  Sat May 10 08:10:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 05:10:13 -0700 (PDT)
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org> 
	<68ku74F2sm1usU1@mid.uni-berlin.de>
Message-ID: <afe776ab-70f4-4b42-8bce-14b137a6478e@8g2000hse.googlegroups.com>

On May 10, 1:38?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 10 May 2008 00:20:33 -0500, Kenneth McDonald wrote:
> > Any guesses as to how many people are still using Tkinter? And can ?
> > anyone direct me to good, current docs for Tkinter?
>
> AFAIK `Tkinter` hasn't changed much over time, so "old" documentation is
> still current.
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch

Get synchronizing into wx.  CallAfter and CallLater both pull too
hard, but I didn't write it for money.  How are specs doing on coming
down?  Window size is important.  Does anyone else bounce around
resizability either?

Ciao.


From rajarshi.guha at gmail.com  Wed May 14 12:13:09 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Wed, 14 May 2008 09:13:09 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com> 
	<dc4255fc-798b-419d-8fff-5965cf9b8c0a@k13g2000hse.googlegroups.com>
Message-ID: <da028d4f-e1fc-48c7-86ba-3bb747433d15@z72g2000hsb.googlegroups.com>

On May 13, 6:57 pm, afrobeard <afrobe... at gmail.com> wrote:
> If I were you, I'd show them actual code and how easy it is to get
> things done. Showing them how to implement a GTalk Bot[http://
> code.google.com/p/pygtalkrobot/] or how to build simple arcade games
> with PyGame[http://www.pygame.org/news.html] would harbor much more
> interest in my opinion because it'll show them their own power. There
> may be some people who oppose this approach under the pretext that
> students taking introductory programming courses should be taught C
> because it incorporates the discipline that is much needed if they
> want to become hard core CS researchers.


Thanks for the pointers. I agree with your comments - the students are
not necessarily going towards CS - there are many from telecom,
business etc. That was one of the big reasons for using Python - the
ability to get stuff done easily and quickly


From wizzardx at gmail.com  Sat May  3 20:10:16 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 02:10:16 +0200
Subject: Light slices + COW
In-Reply-To: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
Message-ID: <18c1e6480805031710r5e332200y8f1a792383f30f5f@mail.gmail.com>

>  That xpairs() generator is nice, but it's not the best possible code
>  (but you may disagree with me, and you may think that code better than
>  the successive D code that uses two slices). Inside it I can't use a
>  list slicing because it copies subparts of the list, probably becoming
>  too much slow (for example if len(seq) == 1000).

What do you mean by best possible? Most efficient? Most readable? And
why don't you use islice?

eg:

def xpairs(seq):
    len_seq = len(seq)
    for i, e1 in enumerate(seq):
        for e2 in islice(seq, i+1, None):
            yield e1, e2

Here's a version which makes more use of itertools. It should be more
efficient, but it's ugly :-) (this is my first time using itertools).

def xpairs(seq):
    def _subfunc():
        for i in xrange(len(seq)):
            e1 = seq[i]
            yield izip(repeat(e1), islice(seq, i+1, None))
    return chain(*_subfunc())

>  That D code is as fast or faster than the code you can back-translate
>  from Python, this is possible because in D arrays slices are very
>  light, they are a struct of <length, pointer>

D compiles to efficient machine code so Python is at a disadvantage
even if you use the same syntax (see my first example). You can make
the Python version faster, but beware of premature optimization.

>  I think Python 3.0 too may enjoy a similar strategy of light slices +
>  COW for strings, lists and arrays (tuples and strings don't need the
>  COW).

What I'dlike to see is a rope[1] module for Python. I'ts in C++'s STL
library[2], but I haven't found a Python version yet.

[1] http://en.wikipedia.org/wiki/Rope_(computer_science)
[2] http://www.sgi.com/tech/stl/Rope.html

With a Python rope library you could do things like this:

a = '<some extremely long string>'
b = rope(a) # Contains a reference to a
c = b[0:100000] # Get a rope object
d = b[100000:200000] # Get another rope object
e = b + b # Get another rope object
print e # Get the string representation of all the re-assembled sub-sections

# And so on. In the above code there was only 1 copy of the huge
string in memory. The rope objects only contain a tree of
sub-operations (slices, concatenations, references to original
sequences, etc).

This shouldn't be too hard to implement. Does anyone know of an
already-existing 'rope' module?

David.


From workitharder at gmail.com  Wed May 21 15:05:17 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 12:05:17 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <fbc4f5fd-5ed2-4f84-9dae-d75e84a09729@y21g2000hsf.googlegroups.com>

On May 21, 11:38 am, Mark Dickinson <dicki... at gmail.com> wrote:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
>
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> a = 1e16-2.
> >>> a
> 9999999999999998.0
> >>> a+0.999     # gives expected result
> 9999999999999998.0
> >>> a+0.9999   # doesn't round correctly.
>
> 10000000000000000.0
>
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?
>
> Mark

I see it too


From castironpi at gmail.com  Tue May 20 14:07:46 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 11:07:46 -0700 (PDT)
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com> 
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com> 
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com> 
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com> 
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com> 
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com> 
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
Message-ID: <4233fb45-f144-423d-aae8-e9fa623ea029@j22g2000hsf.googlegroups.com>

On May 20, 10:40?am, "David C. Ullrich" <dullr... at sprynet.com> wrote:
> In article <20080520154802.4b5df647 at hyperspace>,
>
>
>
>
>
> ?pataphor <patap... at gmail.com> wrote:
> > On Tue, 20 May 2008 06:12:01 -0500
> > David C. Ullrich <dullr... at sprynet.com> wrote:
>
> > > Well, ok. Like I said, I never _took_ the position that it _should_
> > > be a list of lists, I just said I didn't see the advantage to using
> > > a single list.
>
> > I'm now thinking about a list of lists containing single element lists.
>
> > def test():
> > ? ? n = 3
> > ? ? R = range(n)
> > ? ? M = [[[i+j*n] for i in R] for j in R]
> > ? ? for L in M:
> > ? ? ? ? print L
> > ? ? row2 = M[1]
> > ? ? print
> > ? ? print row2
> > ? ? col3 = [L[2] for L in M]
> > ? ? print col3
> > ? ? col3[1][0]=9
>
> > print col3
> > ? ? print row2
> > ? ? print
> > ? ? for L in M:
> > ? ? ? ? print L
>
> > if __name__=='__main__':
> > ? ? ? ? test()
>
> > The idea is to use a single element list as kind of storage facility.
> > That enables me to copy a column, then change something in that column
> > and make the change turn up in the matrix and even in a previously made
> > copy of a row that shared the specific element.
>
> > > Today's little joke: Long ago I would have solved
> > > this by storing the data as a list of rows and _also_
> > > a list of columns, updating each one any time the
> > > other changed. Just goes to show you things
> > > could always be worse...
>
> > Well have I ever ... I only thought about this last week and I
> > actually thought it was a *good* idea.
>
> Sorry. If you really want to do this you could keep things
> in sync automatically by writing the appropriate __setitem__
> and resolving never to modify the data except through that...
>
> def whatever.__setitem__(self, (row,col), value):
> ? self.rows[row][col] = value
> ? self.cols[col][row] = value
>
> Seems to me like an, um, "untenable" waste of space. And you'd
> need to be certain to never set anything except through
> self[row,col]; as far as I can see anything like setrow()
> would be a loop "for col in range(width): self[row,col] =".
>
> Hmm. You could keep the data in some object that encapsulates
> the two double lists and use some fancy feature (__getattribute__?)
> to make certain that the only possible access to the data
> was through __getitem__...
>
>
>
>
>
> > I only gave up on it because
> > now I would have to keep ?track of how far the two views are out of
> > sync, because some operation could use data that was modified by an
> > other view. Zipstar transposition is very handy for syncing, but it is
> > also very expensive. But probably not for you.
>
> > > Expressing interest is a big mistake...
>
> > How so? ;-)
>
> > > Sometime soon a thread will appear titled something
> > > like "indexed attributes" with a stripped-down but
> > > functional example of what I have in mind for Matrix
>
> > I can't wait! Keep up the good work.
>
> > P.
>
> --
> David C. Ullrich- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

You can use tuples in dictionaries.

Example:

>>> a= {}
>>> a[0,1]= 2
>>> a[2,3]= 7
>>> a[0,1]
2


From _karlo_ at _mosor.net_  Wed May 21 19:13:12 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Wed, 21 May 2008 23:13:12 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
Message-ID: <Xns9AA6C693A2A6mosornet@161.53.160.65>

I'm not sure if Python can do this, and I can't find it on the web. So, 
here it goes:


try:
    some_function()
except SomeException:
    some_function2()
    some_function3()
    ...
    # somehow goto 'try' block again

In case it's not clear what I meant: after executing some_function() 
exception SomeExcpetion gets risen. Then, in except block I do something 
to fix whatever is causing the exception and then I would like to go back 
to try block, and execute some_function() again. Is that doable?

Thanks.


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From ivan.illarionov at gmail.com  Sat May 10 13:33:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 10 May 2008 10:33:26 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
Message-ID: <7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>

On 10 ???, 21:22, notbob <not... at nothome.com> wrote:
> On 2008-05-10, Diez B. Roggisch <de... at nospam.web.de> wrote:
>
> > notbob schrieb:
> >> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
> >> dir, same permission, etc.
>
> > I'm pretty sure you misse the correct shebang -
>
> Sorry.  Both exactly the same.  I checked 5 times.
>
> helloworld shebang:  #!/usr/bin/python
> while shebang:       #!/usr/bin/python
>
> (above yanked from respective scripts)
>
> nb

Shebang is certainly broken, possible causes:
1. Wrong line endings (should be \n)
2. Whitespace before the shebang

-- Ivan


From __peter__ at web.de  Fri May 23 04:12:00 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:12:00 +0200
Subject: pickle error: can't pickle instancemethod objects
References: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>
Message-ID: <g15u8f$t0f$03$2@news.t-online.com>

Michele Simionato wrote:

> Can somebody explain what's happening with the following script?

>     def __gestate__(self): # should skip the bound methods attributes

Must be __getstate__ ;)

Peter



From gherron at islandtraining.com  Thu May  1 18:33:09 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 01 May 2008 15:33:09 -0700
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <481A4525.6020205@islandtraining.com>

AlFire wrote:
> Hi,
>
> I have a piece of software which uses threads in very massive way - 
> like hundreds of  them generated every second.
>
> there is also a piece of code which maintains the number of 
> outstanding threads, simply
>
> counter+=1 is executed when before starting the thread and counter-=1 
> after it finishes.
>
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
>
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as 
> expected.
>
> I guarded those statement with Lock.{acquire,release} and now it 
> always returns 0.
>
>
> But I still can not believe that +=1 is not a thread safe operation.
>
>
> Any clue?
>
Of course it's not thread safe.   For the same reason and more basic, 
even the expression i++ is not thread safe in C++.

Any such calculation, on modern processors, requires three operations: 
  retrieve value of i into a register,
  increment the register
  write the value into i.

If a thread is interrupted anywhere within that sequence, and another 
thread access i, you have a conflict.  (And indeed, hardware interrupts 
can occur between any two instructions.)

Gary Herron



From deets at nospam.web.de  Thu May 29 09:44:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 15:44:26 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <6a7qarF35bvivU1@mid.uni-berlin.de>

Christian Meesters wrote:

> Hi
> 
> I'm having trouble with Py_BuildValue. I was able to pinpoint the
> following statement as the one causing a seg. fault with my script:
> 
> static PyObject * funcname(PyObject *self, PyObject *args) {
> ...
>   return Py_BuildValue("(OO)", x, y);
> }
> where x & y are both of type PyObject.
> 
> Any suggestions here? Do I need to handle the output of Py_BuildValue
> somehow before returning? How? Need to decref x & y before returning?

Just a guess - but according to the docs of Py_BuildValue it will return a
tuple already when given a format string of several format units.

What happens if you get rid of the ()?

Diez


From mcknight0219 at gmail.com  Mon May 12 23:02:37 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 20:02:37 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
Message-ID: <58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>

On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
> On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
> > Well, i know it may be a little non-python thing, however, I can think
> >  of no place better to post this question :)
>
> >  can anyone tell me, in python, how to obtain some information of a
> >  running program?
> >  paticularly, if i am playing some music in audacious or other media
> >  player, how can i get the the name and some other info of current
> >  playing song? It seems that audicious doesn't output on run-time
> >  --
> >  http://mail.python.org/mailman/listinfo/python-list
>
> In most cases, you'll probably need some sort of API, either in the
> program itself or through some sort of plugin, that lets external
> programs query it.  For instance, there are some plugins to WinAmp
> that allow external programs (like Last.FM or Mog-O-Matic) to see what
> track is currently playing.  You may also be able to do something like
> get the window title (again, WinAmp's title bar usually includes the
> artist and title) and parse it out.  I don't really know that there's
> anything specific to Python for accessing these though, and it may
> vary depending on media player.
>
> Just my two cents...
>
> -dan

thanks!

In linux, I am always obfuscated by sort of APIs. Like how to get
title information of a running program?
where am I supposed to find these APIs


From rocky at panix.com  Wed May 28 23:18:15 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 28 May 2008 23:18:15 -0400
Subject: pydb remote debugging/cmd.Cmd over socket?
References: <6a5b8qF35n4hiU1@mid.uni-berlin.de>
Message-ID: <wihwsldztl4.fsf@panix5.panix.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> Hi,
>
> I'm fiddling around with pydb. Installation and usage are fine. What I
> especially like is the fact that you can attach a signal such that you drop
> into debugging mode on demand.
>
> But this is of limited use to me in situations where a server is written in
> python. According to the source, pydb's debugger class Gdb extends cmd.Cmd.
>
> It passes stdin/stdout-arguments that should be usable to replace the
> standard streams. But so far all my experiments simply dropped the process
> into debugging mode putting out and getting io over stdin/stdout - not my
> self-supplied streams.
>
> So I wonder (being a bit rusty on my UNIX-piping-skillz): how does one do
> that - essentially, create a remote python shell using cmd.Cmd? 
>
> Diez

As part of the 2006 Google Summer of Code project Matt Flemming
started working on remote debugging in pydb. Alas it wasn't completed
and I let the code fall through the cracks. 

Matt claimed it worked to some degree but I could never get it to work
for me. Most definitely the code has atrophied.

The user interface was loosely based or reminiscent of gdb. So
you'd run pydbserver either as a command inside the debugger or as an
option to pydb or call inside Python pdbserver after importing. 

There is a connection class (file pydb/connection.rb) which was to
allow different kinds of protocols, like a socket connection or 
a serial line connection, or maybe even two FIFO's so that you could
connect to a different process on the same computer.

And there were some commands on the user-interaction side
to attach or detach the Python program you want to debug.

If you look in pydb.py.in and gdb.py.in you'll see some code commented
out with double hashes which is part of this effort.

I invite you or others to try to resurrect this effort. However as I
look at the code now, it doesn't make much sense other than the broad
outline given above.

Another approach and possibly a much simpler one if you are looking
for a Python debugger which supports remote debugging is Winpdb
http://winpdb.org/ by Nir Aides.




From code at pizzashack.org  Sat May  3 00:48:49 2008
From: code at pizzashack.org (Derek Martin)
Date: Sat, 3 May 2008 00:48:49 -0400
Subject: RegEx for matching brackets
In-Reply-To: <4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>
	<4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>
Message-ID: <20080503044849.GH17661@dragontoe.org>

On Fri, May 02, 2008 at 03:51:16PM -0700, NevilleDNZ wrote:
> Thanx for the link to these parsers. ANTLR looks interesting.
> Yoyo: http://www-users.cs.york.ac.uk/~fisher/software/yoyovwg/readme
> 
> I figured out a way to do it in python.
[...]
> 
> def check_open_close(str):
>   try:
>     eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
> [^{}]+)", str) if c))

Ouchie...  It may be short, but if I had to maintain this code, and I
saw this, your name would be used in sentences with lots of curse
words. ;-)  That's one hard-to-read line of code...  Also this may or
may not do what you want it to do -- I think it doesn't...  

This problem is the classical example of when to use a stack (Last-In,
First-Out) data structure.  If all you want to do is make sure that
the line has the same number of opens and closes in a line, your code
does that.  But if you actually want to verify the syntax (i.e. make
sure that there are the same number of open brackets as close
brackets, AND make sure that they occur in the correct order, opens
first, closes last, AND that the closes come in the same (reverse)
order as the opens), your code does not do that.

I changed the tests in your code (specifically the brackets, and
nothing else) to demonstrate this:

DETECTED:   { a test  BAD
DETECTED:   { a test } OK
# This should fail, because the closing ] comes before the open [
MISSED:   { a test ] [ a test } BAD
DETECTED:   { a test } { this { a test } is a test } OK
# this should fail, for the above reason, and because the order is wrong
MISSED:   { a test  { this { a test ] is a test } missing close [}} BAD
DETECTED:   { a test  { this { a test ] is a test } missing close } BAD
# this should also fail for both reasons
MISSED:   { a test  ] this { a test } is a test } missing close [ BAD
DETECTED:   a test } { this { a test } is a test } BAD
DETECTED:   { a test } this { a test } is a test } BAD

It doesn't detect the brackets in the right order (opens before
closes), nor does it detect that they occur in the correct sequence.

Clever code isn't always so clever...  I think there's something to be
said for writing code that's a little bit more lengthy, but easier to
understand.  This version is only a few lines longer than yours (in
total, not counting the comments), but it is a bit clearer and easier
to follow.  Note that I added angle brackets and mixed the bracket
types in the tests.  I also didn't use your referee...  In my code,
the test simply succeeds if the brackets match, and fails if they are
unbalanced or out of order.

#!/usr/bin/python

# define the matching pairs
bm = { '}': '{', 
       ']': '[', 
       ')': '(', 
       '>': '<' }

def bracket_balance(str):
    # initialize the stack to an empty list
    blist = []
    for c in str:
        # If c is an open bracket of any type, place on stack
        if c in bm.values():
            blist.append(c)
	# If it is a close bracket, pull one off the stack and
	# see if they are matching open-close pairs.  If the stack
	# is empty, there was no matching open.  Return false in that
	# case, or if they don't match.
        if c in bm.keys():
            try:
                foo = blist.pop()
            except IndexError: 
                return False
            if foo != bm[c]:
                return False
    # End of the line: if we still have brackets on the stack, we
    # didn't have enough close brackets.  Return false.
    if blist != []: 
        return False
    # If we got here, the stack is empty, and there are no brackets
    # left unmatched.  we're good!
    return True

tests="""
  { this is a test  BAD
  < this is a test > OK
  { this is a test } { this is a test } OK
  { this is a test } [ this { this is a test } is a test ] OK
  { this is a test  { this { this is a test } is a test } missing close BAD
""".splitlines()[1:]

for test in tests:
    print "Testing %s:" % test
    if bracket_balance(test):
        print "-> OK" 
    else:
        print "-> FAILED"

Testing with your original set of tests:

$ ./brackets.py 
Testing   { this is a test  BAD:
-> FAILED
Testing   < this is a test > OK:
-> OK
Testing   { this is a test } { this is a test } OK:
-> OK
Testing   { this is a test } [ this { this is a test } is a test ] OK:
-> OK
Testing   { this is a test  { this { this is a test } is a test } missing close BAD:
-> FAILED

Testing with my modified set of tests:

$ ./brackets.py 
Testing   { a test  BAD:
-> FAILED
Testing   { a test } OK:
-> OK
Testing   { a test ] [ a test } BAD:
-> FAILED
Testing   { a test } { this { a test } is a test } OK:
-> OK
Testing   { a test  { this { a test ] is a test } missing close [}} BAD:
-> FAILED
Testing   { a test  { this { a test ] is a test } missing close } BAD:
-> FAILED
Testing   { a test  ] this { a test } is a test } missing close [ BAD:
-> FAILED
Testing   a test } { this { a test } is a test } BAD:
-> FAILED
Testing   { a test } this { a test } is a test } BAD:
-> FAILED

In all cases, this code correctly identifies when the brackets are out
of order, or unbalanced.

-- 
Derek D. Martin
http://www.pizzashack.org/
GPG Key ID: 0x81CFE75D

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From bignose+hates-spam at benfinney.id.au  Fri May  2 01:50:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 15:50:22 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
Message-ID: <87ve1xz23l.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 13:24:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > I much prefer "#! /usr/bin/python" because I want my Python
> > programs to, by default, be run with the default Python, and
> > depend on Python being installed by the operating system's package
> > manager. On systems that use shebang lines and that actually have
> > standardised filesystem locations, the default Python is found at
> > '/usr/bin/python'.
> 
> You have lived a sheltered life.  Not every packaging system puts the
> executible in /usr/bin.  Many systems use /usr/local/bin.

They use that for the operating-system-installed default Python
interpreter? Colour me incredulous.

-- 
 \           ?[The RIAA] have the patience to keep stomping. They?re |
  `\        playing whack-a-mole with an infinite supply of tokens.? |
_o__)                                  ?kennon, http://kuro5hin.org/ |
Ben Finney


From umpsumps at gmail.com  Fri May  9 17:19:38 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Fri, 9 May 2008 14:19:38 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
Message-ID: <54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>

> > What would be the best method to print the top results, the one's that
> > had the highest amount of anagrams??  Create a new histogram dict?
>
> You can use the max() function to find the biggest list of anagrams:
>
> top_results = max(anagrams.itervalues(), key=len)
>
> --
> Arnaud

That is the biggest list of anagrams, what if I wanted the 3 biggest
lists?  Is there a way to specific top three w/ a max command??



From jeffrey at fro.man  Tue May  6 14:15:04 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 06 May 2008 11:15:04 -0700
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>
	<X71Uj.15556$pI4.12568@fe101.usenetserver.com>
Message-ID: <9OGdnYcw57m1Pb3VnZ2dnUVZ_vCdnZ2d@cablespeedwa.com>

notbob wrote:

> Do python scripts require the:
> 
> #!/usr/bin/env python

An appropriate shebang is required if you intend to use the module itself as
a script, from the command line, like:

    $ ./my_module.py  argument argument ...

It is not required merely to import the module into a python program or
interpreter. Even without the shebang, the module can be run indirectly
with:

    $ python ./my_module.py argument argument ...

or, if the module is somewhere on your sys.path:

    $ python -m my_module argument argument ...


Jeffrey


From stef.mientki at gmail.com  Sat May 10 15:25:47 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 10 May 2008 21:25:47 +0200
Subject: how to reference my own module ?
Message-ID: <4825F6BB.9090707@gmail.com>

hello,

I've a library that I import as
 
    import ppygui.api as gui

the reason for this construct is that I've to use different libraries 
for different platforms.

Now I like to write some examples in the library (activated by if 
__name__ == '__main__' :)
and I would that these examples can be used in the user program just by 
copy / paste.

For calling a function / class in the user program I've to write:

    sizer = gui.VBox ()

So also write exactly the same sentence in the library examples,
but  "gui" is not recognized

Any ideas how I can realize the above ?

thanks,
Stef Mientki





From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 10:01:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 16:01:15 +0200
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <4824592a$0$26517$426a74cc@news.free.fr>

grbgooglefan a ?crit :
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.

Do you really need a function for this ?

if "foo" in "foobar":
    print "do you really really need a function for this ?"


> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1

which is a convoluted way to write:

   return s2 not in s1


> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?

Err... How to say... The boolean negation operator in Python is "not". 
So the only answer I can provide is : "use 'not' instead of '!'". And 
while we're at it : drop those useless parens.

HTH


From dikkie at nospam.org  Wed May 28 19:43:18 2008
From: dikkie at nospam.org (Dikkie Dik)
Date: Thu, 29 May 2008 01:43:18 +0200
Subject: Python's tail -f implementation for remote files
In-Reply-To: <483dda9a$0$11598$607ed4bc@cv.net>
References: <483dda9a$0$11598$607ed4bc@cv.net>
Message-ID: <483dee16$0$1279$bf4948fe@news.tele2.nl>

asdf wrote:
> Basically what i want to do is to read a file
> that is being constantly appended to but which
> is located on a remote server.
> I found this for doing BASH's tail -f in python:
> 
> import os
> tailoutputfile = os.popen('tail -f syslog')
> while 1:
>     line = tailoutputfile.readline()
>     if len(line)==0:   # change the termination condition 
>         break
>     process_line(line)
> 
> and it works great. But not sure how to use this with
> ssh command to connect to remote machine.
> 
> Any tips?

ssh host_address 'tail -f file_name'

Should do it (from the command line). Off course, you can put this into 
popen as well. If you log in with a public key (see ssh-keygen), you do 
not have to supply a password using the console.

Best regards.


From notbob at nothome.com  Sat May 10 19:22:00 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 23:22:00 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <s6qVj.8627$Qw5.2820@fe107.usenetserver.com>

On 2008-05-10, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> 	So... in short, you'd need to have been reading a tutorial specific
> to "shell" scripting...

I have been.  I'm also trying to learn bash shell scripting, not to mention
sed/awk, php, etc.  I should have started this a long time ago, but I'm lazy
and, like I said, I'm not particularly fond of coding.  Yes, I have learned
basic C and basic , but never beyond intro.  Now, I'm doing it because I'm a
geezer and I figure my brain needs more exercise then just blabbing on
usenet.  Besides, I've been cruising while using linux for too long and have
remained low end intermediate.  Time to get serious.  Pass the cheat sheets!

nb




From tarun.kap at gmail.com  Fri May  2 16:35:30 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 13:35:30 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<858f0130-2d19-4429-8f80-346aa5cc7c9f@r66g2000hsg.googlegroups.com>
Message-ID: <8667e17a-705c-4984-af05-4ba59d2dd26d@m3g2000hsc.googlegroups.com>

On May 2, 3:09 pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 2, 3:04 pm, TkNeo <tarun.... at gmail.com> wrote:
>
>
>
> > On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> > wrote:
>
> > > TkNeo wrote:
> > > > WHAT ?
>
> > > > This is crazy
>
> > > Crazy like a fox?
>
> > > a = [1, 2, 3]
> > > try:
> > >      a.index(99)
> > > except:
> > >      a.append(99)
> > > finally:
> > >      print a.index(99)
>
> > > MY question: which exception should I actually be catching there?
> > > ** Posted fromhttp://www.teranews.com**
>
> > ofcouse try catch is going to work but in ideality the index function
> > should return a -1 and no way in hell crash.
>
> Please refrain from making such inane comments after an hour or two of
> toying with a new language. Read a good tutorial first (e.g.http://diveintopython.org/toc/index.html) and come back if you have a
> real question.
>
> George

George - I am not trying to be negative in any way whatsoever.

0 - In my first post in this thread, i was just being sarcastic.
1- I have been using python for more than an year or so. Just not an
avid user as probably you are.
2. You suggest me to ask a "REAL" question. Real is a relative word.
What is real to you might not be real to lets say Guido van Rossum. I
met him a few months ago and he was very humble to all the stupid
questions i had.
3  The board does not specify the level of python developers who can
post questions.
4 -I have always heard that python community is based on sharing and
helping each other. Please keep those spirits up.

Thanks for replying and sorry for wasting your time.
TK



From maehhheeyy at gmail.com  Thu May  1 16:06:20 2008
From: maehhheeyy at gmail.com (maehhheeyy)
Date: Thu, 1 May 2008 13:06:20 -0700 (PDT)
Subject: i want to add a timeout to my code
References: <53ffe104-be3b-43e2-b5c8-4ce5886ac60d@b1g2000hsg.googlegroups.com>
	<1f70ea43-7909-4bd8-b63d-2467e8a0542f@c65g2000hsa.googlegroups.com> 
	<ac8721f0-fe0d-446b-8954-bd097e6d940a@f24g2000prh.googlegroups.com> 
	<mailman.351.1209508222.12834.python-list@python.org>
Message-ID: <2976bcad-e514-4a33-bf1a-5966997b6d42@1g2000prg.googlegroups.com>

On Apr 29, 3:29?pm, John Krukoff <jkruk... at ltgc.com> wrote:
> On Tue, 2008-04-29 at 14:47 -0700, maehhheeyy wrote:
> > On Apr 17, 4:24 pm, Miki <miki.teb... at gmail.com> wrote:
> > > On Apr 17, 1:10 pm,maehhheeyy<maehhhe... at gmail.com> wrote:
>
> > > > I want to add a timeout so that when I pull out my gps from my serial
> > > > port, it would wait for a bit then loop and then see if it's there. I
> > > > also want to add a print statement saying that there is no GPS device
> > > > found. However when I run my code and unplug my serial port, my code
> > > > will just hang until I plug it back in.
> > > > This is my code right now:
>
> > > > def GetGPS():
> > > > ? ? ? data = []
> > > > ? ? ? #Open com1: 9600,8,N,1
> > > > ? ? ? fi = serial.Serial(0, timeout = 1)
> > > > ? ? ? print '[gps module] SERIAL PORT OPEN ON COM1:'
>
> > > > can anyone help me please? Thanks.
>
> > >http://docs.python.org/lib/node545.html
>
> > > HTH,
> > > --
> > > Miki <miki.teb... at gmail.com>http://pythonwise.blogspot.com
>
> > I tried the code onto my codes but what came out was that in the line
> > signal.signal(signal.SIGSLRM, handler), an attributeError appeared
> > reading that 'module' object has no attribute 'SIGALRM'
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Are you writing your program on windows, or some other platform which is
> not unix?
>
> --
> John Krukoff <jkruk... at ltgc.com>
> Land Title Guarantee Company- Hide quoted text -
>
> - Show quoted text -

Yeah I'm using Windows 2000.


From banibrata.dutta at gmail.com  Sat May  3 05:28:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sat, 3 May 2008 14:58:26 +0530
Subject: Newbie question - probably FAQ (but not exactly answered by regular
	FAQ)
Message-ID: <3de8e1f70805030228y33b081faoa56fd251d48a3ae8@mail.gmail.com>

Hi,

I've gone through the list of "language differences" between 2.3 / 2.4
& 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
CPython, and I consider myself still very very newbie. So, unable to
take a call as to how-important or desirable the newer language
features are -- so whether to write my app for v2.5 of Python, versus,
as few others on this list have recommended, i.e. to stick to v2.3 ??
Are the preformance improvements, and memory footprint / leak fix in
2.5 enough to justify moving to it ? What all do I stand to lose (or
gain) by writing on v2.3 ??

I've a constraint due to which I might have to also write parts of my
app (client side) in Jython (because I want to eventually ship Java --
yet benefit from the rapid development and clarity of Python). Would
sticking to v2.3 in such a case be a better idea ? Suggestions with
reasoning would be very helpful.

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta


From gagsl-py2 at yahoo.com.ar  Sat May 17 01:33:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 May 2008 02:33:13 -0300
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <op.ua99pnrvx6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov  
<ivan.illarionov at gmail.com> escribi?:

> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.
>
> I can't see any use-case of them that couldn't be re-written more clearly
> with methods of metaclass or plain functions.

A good use case for class methods are alternate constructors, like  
dict.from_keys. I don't think an alternate constructor would be more clear  
being a method of the metaclass - actually it belongs to the class itself,  
not to its metaclass.
Metaclass methods are harder to find; they don't show in dir(instance) nor  
dir(class).
Also the resolution order is harder to grasp for metaclasses - but this  
may be just lack of usage from my part...

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place
> making your code a mess.

Not necesarily; some classmethods are naturally tied to the class itself,  
not to the metaclass (like the constructor example above). But yes, *some*  
classmethods could be written as methods of their metaclass instead - but  
that doesn't always make sense.

> 2. They are slower than metaclass methods or plain functions.

Hu? How did you come to that?
I've done a small test and a class method wins by a very minuscule but  
consistent advantage over a metaclass method:

class A(object):
     color = "red"

     @classmethod
     def foo(cls, x):
         return getattr(cls, x)

class MetaB(type):
     def foo(self, x):
         return getattr(self, x)

class B(object):
     __metaclass__ = MetaB
     color = "red"

C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"  
"A.foo('color')"
1000000 loops, best of 3: 1.19 usec per loop

C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"  
"B.foo('color')"
1000000 loops, best of 3: 1.2 usec per loop


-- 
Gabriel Genellina



From george.sakkis at gmail.com  Sat May 31 10:40:15 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 31 May 2008 07:40:15 -0700 (PDT)
Subject: How to add function return value
References: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>
	<7d89a189-1ce9-46d3-b200-2ad86858fa45@h1g2000prh.googlegroups.com>
Message-ID: <a01f02b1-7efb-4791-ac09-bec6bfeac5b9@w7g2000hsa.googlegroups.com>

On May 30, 10:16?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> On May 30, 6:21?pm, HYRY <ruoyu0... at gmail.com> wrote:
>
> > Can I write a decorator that it can automately do this conversion
>
> > def func1()
> > ? ? a = 1
>
> > --->
>
> > def func1():
> > ? ? a = 1
> > ? ? return locals()
>
> Not sure why you would want to do this, but there are several ways.
>
> 1. Make bytecode hack decorator that transforms the final "return
> None" into "return locals()". ?A recipe that shows the basic technique
> is at:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277940
>
> 2. Retrieve the source using inspect.getsourcelines(f). Then, append a
> "return locals()" to the end of the function and run it through exec.
>
> 3. Try hacking a tracing/debugging utility.
>
> 4. Run the sourcefile through tokenize, make the appropriate
> insertion, and then untokenize.


Here's an illustration of (3):

import sys
import functools

def withlocals(f):
    @functools.wraps(f)
    def wrapper(*args, **kwds):
        f_locals = {}
        def probe(frame, event, arg):
            if event == 'return':
                f_locals.update(frame.f_locals)
            return probe
        sys.settrace(probe)
        try: res = f(*args,**kwds)
        finally: sys.settrace(None)
        return (res, f_locals)
    return wrapper

# example

@withlocals
def foo(x, y=0, *args, **kwds):
    a = max(x,y)
    b = len(args)
    c = min(kwds.values())
    return a+b+c

r,locs = foo(1,2,3,4,a=5,b=6)
print locs

George


From marco_furchi at hotmail.com  Tue May 20 03:57:29 2008
From: marco_furchi at hotmail.com (marco furchi)
Date: Tue, 20 May 2008 09:57:29 +0200
Subject: fafdasf
Message-ID: <BAY107-W3854970E8360EEA8A28552E1C40@phx.gbl>


asdfdg
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From ivan.illarionov at gmail.com  Sat May 17 05:50:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 09:50:19 +0000 (UTC)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org>
Message-ID: <g0m9or$2qk0$1@news.mtu.ru>

On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:

> En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
> <ivan.illarionov at gmail.com> escribi?:
> 
>> After re-reading "Python is not Java" I finally came to conclusion that
>> classmethods in Python are a very Bad Thing.
>>
>> I can't see any use-case of them that couldn't be re-written more
>> clearly with methods of metaclass or plain functions.
> 
> A good use case for class methods are alternate constructors, like
> dict.from_keys. I don't think an alternate constructor would be more
> clear being a method of the metaclass - actually it belongs to the class
> itself, not to its metaclass.
> Metaclass methods are harder to find; they don't show in dir(instance)
> nor dir(class).
> Also the resolution order is harder to grasp for metaclasses - but this
> may be just lack of usage from my part...
> 
>> They have the following issues:
>> 1. You mix instance-level and class-level functionality in one place
>> making your code a mess.
> 
> Not necesarily; some classmethods are naturally tied to the class
> itself, not to the metaclass (like the constructor example above). But
> yes, *some* classmethods could be written as methods of their metaclass
> instead - but that doesn't always make sense.
> 
>> 2. They are slower than metaclass methods or plain functions.
> 
> Hu? How did you come to that?
> I've done a small test and a class method wins by a very minuscule but
> consistent advantage over a metaclass method:
> 
> class A(object):
>      color = "red"
> 
>      @classmethod
>      def foo(cls, x):
>          return getattr(cls, x)
> 
> class MetaB(type):
>      def foo(self, x):
>          return getattr(self, x)
> 
> class B(object):
>      __metaclass__ = MetaB
>      color = "red"
> 
> C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> "A.foo('color')"
> 1000000 loops, best of 3: 1.19 usec per loop
> 
> C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> "B.foo('color')"
> 1000000 loops, best of 3: 1.2 usec per loop

How did I come to this:
http://code.djangoproject.com/changeset/7098

I measured this and there was a marginal speed increase when classmethods 
wher moved to metaclass.

-- Ivan


From mail at timgolden.me.uk  Thu May 22 11:37:45 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 22 May 2008 16:37:45 +0100
Subject: Showing the method's class in expection's traceback
In-Reply-To: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
Message-ID: <48359349.3090501@timgolden.me.uk>

Agustin Villena wrote:
> I don't see things like you, because I'm accustomed to design my
> software
> though classes and see the code in an "object = software's functional
> atom/component" way
> I agree that python's dynamic nature make things complicated here, but
> for me it its just
> an implementation problem derived of the recent OOP support of python

(laughs). I do hope you're either joking or wearing a flameproof suit.
Python's dynamic nature as an implementation problem. Hmmm..
And what's that about "recent" OOP support of Python?

Oh well... 

TJG


From sophacles at gmail.com  Mon May 12 13:59:02 2008
From: sophacles at gmail.com (Erich)
Date: Mon, 12 May 2008 10:59:02 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <5c63d29d-a452-4831-aa68-4b8831f9e71d@s50g2000hsb.googlegroups.com>

On May 12, 12:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:

> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>

I am of the belief that there is no such thing as "useless learning",
or "bad learning"*. I have found that the more I learn about anything,
the better I am at everything. I think this is because more knowledge/
understanding does:
1. gives me more 'entry points' for new knowledge, I can relate more
bits to something I know, making the whole learning process easier.
2. allows me to better relate to people who I need to communicate
with, becuase it is more likely there is a common point of knowledge/
interest to build from
3. gives me personal satisfaction in my life (self-actualization).

When I learned python, I was a bartender, and was just learning it for
fun. Only later did I become a computer programmer. I was lucky enough
to find a job where I get to do a lot of my work in python.

* There are times when learning new info set A is more productive than
new info set B, depending on other constraints of time, energy, money,
etc, B could be classified as "unwise learning"

Regards,
Erich


From maxwell.newlands at gmail.com  Thu May 15 16:00:34 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 13:00:34 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
Message-ID: <8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>

you're right, my java implementation does indeed parse for Id3v2
(sorry for the confusion).  i'm using the getrawid3v2() method of this
bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
i buffer and parse.  apologies if i misrepresented my code!

back to python, i wonder if i'm misusing the mutagen id3 module.  this
brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
Mutagen/Tutorial) leads me to believe that something like this might
work:

from mutagen.mp3 import MP3
id3tags = MP3(urllib2.urlopen(URL))

but this gives me the following TypeError: "coercing to Unicode: need
string or buffer, instance found".  does this mean i need to convert
the "file-like object" that is returned by urlopen() into a unicode
object?  if so, do i just decode() with 'utf-8', or is this more
complex?  as of now, doing so gives me mostly "No such file or
directory" errors, with a few HTTP 404s.

anyway, thanks again....


On May 15, 1:02?pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> "John Krukoff" <jkruk... at ltgc.com> writes:
> > I'd love to know how Java handles all that automatically through a
> > generic stream interface, though.
>
> It could be that their stream interface supports seek(), and that
> seek()ing on HTTP connection sends the appropriate range request and,
> if it fails, throws an appropriate exception which the client code
> interprets as "seeking impossible, read the whole file".
>
> But that doesn't apply to the InputStream interface described athttp://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStream.html-- no
> seeking there.



From paul at science.uva.nl  Wed May  7 03:29:04 2008
From: paul at science.uva.nl (Paul Melis)
Date: Wed, 07 May 2008 09:29:04 +0200
Subject: PEP 370 question
Message-ID: <fvrlo0$v7$1@info.science.uva.nl>

In (the recently accepted) PEP 370 it says

"Current Python versions don't have a unified way to install packages 
into the home directory of a user (except for Mac Framework builds). 
Users are either forced to ask the system administrator to install or 
update a package for them or to use one of the many workarounds like 
Virtual Python [1], Working Env [2] or Virtual Env [3].

[...]

The feature can't be implemented using the environment variable 
PYTHONPATH. The env var just inserts a new directory to the beginning of 
sys.path but it doesn't parse the pth files in the directory. A full 
blown site-packages path is required for several applications and Python 
eggs."

I'm confused. For years I've been installing packages and extension 
modules locally using distutils's --prefix option, e.g. using

   python setup.py install --prefix=$HOME/local

Together with adding $HOME/local/lib/python2.4/site-package to my 
PYTHONPATH this works fine, even if there are packages that require a 
.pth file to work or that use Eggs (like setuptools and pygments).

So what limitation does the quoted paragraph in the PEP refer to?

Regards,
Paul


From vivainio at gmail.com  Thu May 15 09:30:51 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 15 May 2008 13:30:51 GMT
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
Message-ID: <87ve1fd78z.fsf@gmail.com>

Chris <cwitts at gmail.com> writes:

> On May 15, 2:27?pm, globalrev <skanem... at yahoo.se> wrote:

>> i have a big collection of .txt files that i want to open and parse to
>> extract information.
>>
>> is there a library for this or maybe even built in?
>
> os.open to open the files and iterate through it and built in string
> functions to parse it.

Or more probably, regular expression library "re".


From max at alcyone.com  Tue May  6 05:18:10 2008
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 06 May 2008 02:18:10 -0700
Subject: Decimal vs Float comparasion
In-Reply-To: <H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
References: <mailman.625.1210045932.12834.python-list@python.org>
	<H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
Message-ID: <L6SdnVaSOvHIv73VnZ2dnUVZ_oPinZ2d@speakeasy.net>

Dennis Lee Bieber wrote:

> On Tue, 6 May 2008 11:52:10 +0800, "Yuan HOng" <hongyuan1306 at gmail.com>
> declaimed the following in comp.lang.python:
> 
>> It seems to me that rather than allowing this to happen, comparasion
>> between the two should either be made correct (by convertion decimal
>> to float e.g.) or forbidden, like arithmatic operations between the
>> two types.
> 
> 	Why should decimal be coerced to float? Maybe float should be
> coerced to decimal?
> 
> 	Or... the programmer should explicitly specify what comparison is
> wanted -- if any...
> 
> 	Or... Isn't Python 3.x supposed to forbid mixed type comparisons
> unless the types implement suitable handling?

Bottom line is that it shouldn't silently return something insane. 
99999.0 is surely exactly representable in any modern floating point 
system, being a floating point representing of an integer, so silently 
returning a completely invalid comparison is a tremendously bad idea.

It's a bug.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
   Can I walk with you / 'Till the day that the world stops turning
    -- India Arie


From ankitanand1986 at gmail.com  Wed May 28 07:48:53 2008
From: ankitanand1986 at gmail.com (Ankit)
Date: Wed, 28 May 2008 04:48:53 -0700 (PDT)
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
Message-ID: <0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>

Thanks for replying guys but could you be a little more specific like
in terms of steps i shd follow to make the decoder and also how is
ffmpeg/libffmpeg going to help..


Regards
Ankit Anand


From kar1107 at gmail.com  Fri May  2 01:11:09 2008
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Thu, 1 May 2008 22:11:09 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
Message-ID: <7d00b02d-fe6b-4684-9197-5e1a7d2f5fef@y18g2000pre.googlegroups.com>

On May 1, 8:01 pm, Yves Dorfsman <y... at zioup.com> wrote:
> In the following script, m1() and m2() work fine. I am assuming m2() is
> faster although I haven't checked that (loops through the list twice instead
> of once).
>
> Now what I am trying to do is something like m3(). As currently written it
> does not work, and I have tried different ways, but I haven't managed to
> make it work.
>
> Is there a possibility ? Or is m2() the optimum ?
>
> Thanks.
>
> #!/usr/bin/python
>
> l = [ { 'colour': 'black',   'num': 0},
>        { 'colour': 'brown',   'num': 1},
>        { 'colour': 'red',     'num': 2},
>        { 'colour': 'orange',  'num': 3},
>        { 'colour': 'yellow',  'num': 4},
>        { 'colour': 'green',   'num': 5},
>        { 'colour': 'blue',    'num': 6},
>        { 'colour': 'violet',  'num': 7},
>        { 'colour': 'grey',    'num': 8},
>        { 'colour': 'white',   'num': 9}
>      ]
>
> def m1():
>    colours = [ e['colour'] for e in l ]
>    nums    = [ e['num']    for e in l ]
>
> def m2():
>    colours = []
>    nums    = []
>    for e in l:
>      colours.append(e['colour'])
>      nums.append(e['num'])
>
> #def m3():
> #  colours, nums = [ e['colour'], e['num'] for e in l ]
>

Looks like m1 is the cleanest; if you really want to run list-
comprehension once, one possible way:

>>> p = [ (e['colour'], e['num']) for e in l ]
>>> import operator
>>> map(operator.itemgetter(0), p)
['black', 'brown', 'red', 'orange', 'yellow', 'green', 'blue',
'violet', 'grey', 'white']
>>> map(operator.itemgetter(1), p)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>>

Karthik
> --
> Yves.http://www.SollerS.ca



From kamhung.soh at gmail.com  Fri May  9 18:25:27 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 10 May 2008 08:25:27 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
Message-ID: <op.uawq8posev04yd@hungvista>

On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:

>> > What would be the best method to print the top results, the one's that
>> > had the highest amount of anagrams??  Create a new histogram dict?
>>
>> You can use the max() function to find the biggest list of anagrams:
>>
>> top_results = max(anagrams.itervalues(), key=len)
>>
>> --
>> Arnaud
>
> That is the biggest list of anagrams, what if I wanted the 3 biggest
> lists?  Is there a way to specific top three w/ a max command??
>

Built-in max() function only returns one result.

My solution is to make a sorted list and return last three items:

sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From yves at zioup.com  Sun May 11 18:32:54 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Sun, 11 May 2008 22:32:54 GMT
Subject: How to call a file
In-Reply-To: <mailman.903.1210433607.12834.python-list@python.org>
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
	<mailman.903.1210433607.12834.python-list@python.org>
Message-ID: <quKVj.133609$Cj7.104353@pd7urf2no>

Gary Herron wrote:

> First of all, some terminology: You are not *calling* a file, you are 
> *opening* it or reading.

Wouldn't it be more correct to say that, in python, you either create a file 
object, or call a method for that object, once the object has been created ?



Yves.


From wuwei23 at gmail.com  Wed May 21 21:40:08 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:40:08 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com>
Message-ID: <e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com>

On May 22, 8:18 am, jonbutle... at googlemail.com wrote:
> Sorry, im new to both python and newsgroups, this is all pretty
> confusing. So I need a line in my __init__ function of my class? The
> spider class I made inherits from HTMLParser. Its just using the
> feed() function that produces errors though, the rest seems to work
> fine.

Let me repeat: it would make this a lot easier if you would paste
actual code.

As you say, your Spider class inherits from HTMLParser, so you need to
make sure that you set it up correctly so that the HTMLParser
functionality you've inherited will work correctly (or work as you
want it to work). If you've added your own __init__ to Spider, then
the __init__ on HTMLParser is no longer called unless you *explicitly*
call it yourself.

Unfortunately, my earlier advice wasn't totally correct... HTMLParser
is an old-style object, whereas super() only works for new-style
objects, I believe. (If you don't know about old- v new-style objects,
see http://docs.python.org/ref/node33.html). So there are a couple of
approaches that should work for you:

    class SpiderBroken(HTMLParser):
        def __init__(self):
            pass # don't do any ancestral setup

    class SpiderOldStyle(HTMLParser):
        def __init__(self):
            HTMLParser.__init__(self)

    class SpiderNewStyle(HTMLParser, object):
        def __init__(self):
            super(SpiderNewStyle, self).__init__()

Python 2.5.1 (r251:54863, May  1 2007, 17:47:05) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> html = open('temp.html','r').read()
>>> from spider import *
>>> sb = SpiderBroken()
>>> sb.feed(html)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\lib\HTMLParser.py", line 107, in feed
    self.rawdata = self.rawdata + data
AttributeError: SpiderBroken instance has no attribute 'rawdata'
>>> so = SpiderOldStyle()
>>> so.feed(html)
>>> sn = SpiderNewStyle()
>>> sn.feed(html)
>>>

The old-style version is probably easiest, so putting this line in
your __init__ should fix your issue:

    HTMLParser.__init__(self)

If this still isn't clear, please let me know.

- alex23


From dstromberglists at gmail.com  Sun May 11 15:44:09 2008
From: dstromberglists at gmail.com (Dan Stromberg)
Date: Sun, 11 May 2008 19:44:09 GMT
Subject: diffing and uniqing directories
References: <mailman.233.1209233669.12834.python-list@python.org>
Message-ID: <d0IVj.3118$17.1282@newssvr22.news.prodigy.net>

On Sat, 26 Apr 2008 23:44:17 +0530, Rustom Mody wrote:

> Over years Ive collected tgz's of my directories. I would like to diff
> and uniq them
> 
> Now I guess it would be quite simple to write a script that does a walk
> or find through a pair of directory trees, makes a SHA1 of each file and
> then sorts out the files whose SHA1s are the same/different. What is
> more difficult for me to do is to write a visual/gui tool to help me do
> this.
> 
> I would guess that someone in the python world must have already done it
> [The alternative is to use some of the tools that come with version
> control systems like git. But if I knew more about that option I would
> not be stuck with tgzs in the first place ;-)]
> 
> So if there is such software known please let me know.
> 
> PS Also with the spam flood that has hit the python list I dont know if
> this mail is being read at all or Ive fallen off the list!

It doesn't have a GUI, but here's a python program I wrote for dividing 
large collections of files up into identical groups:

http://stromberg.dnsalias.org/~strombrg/equivalence-classes.html



From tjreedy at udel.edu  Mon May 12 19:21:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 19:21:41 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net><41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com><48275446$0$11628$607ed4bc@cv.net>
	<87mymw8nr0.fsf@benfinney.id.au><f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com><g08jvd$2k0g$1@news.mtu.ru>
	<87iqxk6nvs.fsf@benfinney.id.au><g08pnf$2lbi$1@news.mtu.ru>
	<877ie06kdl.fsf@benfinney.id.au>
Message-ID: <g0aje3$o8t$1@ger.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:877ie06kdl.fsf at benfinney.id.au...
| So, when not using the values that come from the controlling iterator,
| it's good to make that explicit. If Python supported it, we might
| prefer to use no name at all for something that isn't used, but the
| 'for' syntax doesn't allow that.

But I presume it could if [target 'in'] were optional.

for range(n): <stuff to do n times>

It is possible this has been proposed and rejected,
but I have no specific memory.

tjr





From castironpi at gmail.com  Thu May  8 19:56:12 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:56:12 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <bb9989f5-baa5-4761-9f71-d6c8bc8de71c@m73g2000hsh.googlegroups.com>

On May 8, 6:50?pm, Barry Warsaw <ba... at python.org> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On behalf of the Python development team and the Python community, I ?
> am happy to announce the third alpha release of Python 2.6, and the ?
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not ?
> suitable for production environments. ?We continue to strive for a ?
> high degree of quality, but there are still some known problems and ?
> the feature sets have not been finalized. ?These alphas are being ?
> released to solicit feedback and hopefully discover bugs, as well as ?
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you. ?If you find things broken or incorrect, please submit a bug ?
> report at
>
> ? ?http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
> ? ?http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
> ? ?http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions. ?If all goes ?
> well, next month will see the first beta releases of both, which will ?
> also signal feature freeze. ?Two beta releases are planned, with the ?
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
> ? ? ?http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry
>
> Barry Warsaw
> ba... at python.org
> Python 2.6/3.0 Release Manager
> (on behalf of the entire python-dev team)
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.8 (Darwin)
>
> iQCVAwUBSCORrnEjvBPtnXfVAQIK+QQAgEUtAvW7uo0BxMiT1bCAo2E9ZecWJ9xe
> DBgd/5IK8moITkqhqGAH5UvfytV6uPkOMgGIS/Uvk4hzhU3jwSopEIDJLFQ5nGtC
> lCzOHzkDjSNZ8Q2OOAI9mbSHY8grvVxCMB4X2SVXIEMZ6M/X1AcV2b0utp9O1w/l
> T/PEvP8U1uY=
> =2Tnb
> -----END PGP SIGNATURE-----

Does signal freeze signal signal freeze?  Or should ideas pend beta?


From banibrata.dutta at gmail.com  Fri May  9 09:23:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 18:53:26 +0530
Subject: Pythonwin
In-Reply-To: <11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>

if one has installed ActiveState Python 2.5, I think it'd have been
  Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
and I think it delivers IDLE, not PythonWin.


On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:
>
> On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
> > Hi
> >
> > I am trying to use Python with ArcGIS.
> >
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> >
> > How do you install or launch pythonwin??
> >
> > Thanks
> >
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From inhahe at gmail.com  Sun May 18 03:42:58 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 03:42:58 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
Message-ID: <r5RXj.48195$3v1.31693@bignews3.bellsouth.net>


What advantages do teams have? in what? over who? when?  If they have
any use at all,
what language is good for them?  How do programming teams interact?
It sounds fun.  I'm not sure I want to get work done so much as talk,
but programming is fun.

-the advantages of teams in general is the organization of effort.
-with 10 people doing 10 things in their own individually chosen
-directions, you get 10 little things done. with 10 people doing 10
-things in a team, you get 1 big thing done that's 10 times as large.
-(some things that can be done can only be done as big things; i.e
-not everything is scalar in a practical sense). and that's not even
-including synergy.  perhaps i should have said, the "coalition
-/coalescence" of effort, as the organization of it is a different
-matter.  that's a harder animal to tackle.  it also applies to
-computing itself.  why is programming useful? because of its
-organization. why is a CPU useful? because of its organization.
-why is an organization useful?  why are systems effective? is the
-universe a system? is it thusly a matter of reciprocality? (as
-affected and affecter are two sub-systems of the universe)
-a team's advantage is in accomplishing a goal that all members
-agree to accomplish.  this may involve compromising on their
-own goals just enough to do something close but similar that can
-actually get done.  but it gets more complex than that as a lot of
-people join programming teams to make money and put bread on
-the table.  the economy becomes the team. and then you get into
-game theory and realize that sometimes just because a system
-falls into a certain order doesn't mean it's the most mutually
-beneficial way of doing things.
-a programming team wouldn't have an advantage "over"
-somebody unless it's a competing company.  but then those
-companies also have teams so it wouldn't be having a team
-per se that gives an advantage "over" them. although teams
-of programmers would have advantage over every would-be
-single programmer that would want to program a competing
-product.  but do those people even count?  they're not in the
-arena.
-even with a programming team, what language to use depends on
-what the goal is.  although it also depends on the preconceptions
-of ill-informed higher-ups.  i'm not prepared to say, though, that
-some programming languages aren't more amenable to
-team-work than others.

I'd start to discuss state property in appertanance to city property.
What are some properties of the state?

-what states have more than cities: power.  universality.  levels of
-beaurocracy.  global relevance. size.  superordination.  time.

You would have to introduce a computer to a (finite?) way of
expressing language, provided it *expresses* at rates over time that
do not exceed its input (impression), and limited by the complexity
bound of the architecture.  Tangent: architecture complexity.

-hmm. expression vs. impression rates represents symmetry in flow.
-conservation of information.  complexity of architecture is static.
-so i wonder what dimension that affects.  the only thing I can think of
-is that regardless of your flow control if your architecture is too
-simple then people will realize that it's not sentient.  they may realize
-that anyway but they'd be less entertained.  basically, your computer
-would be less effective at achieving its goals in a complex arena.  but
-not all arenas are complex. (people are, yes.)

In order to recreate 'propositional knowledge', you have to tell it.
Accumulating could amount to hashing video feed over time.  What do
you know about what's on the screen?  Naturally, as symbols are
logical, the video would have to be of something you want from it,
even if it's high spirits.

-i don't fully understand this logic and i don't fully agree with it so i
-won't comment.

I am less concerned about the audio, but maybe video is just one way
of learning.  What information do the mic inputs convey from a spoken
voice?  (And how do you summarize that?)

-it's probably easier to gather information from audio.  but then you can
-gather more at a time from video (with more holistic requirements).  but
-then if you're measuring how much you can gather per byte of input
-stream (thus putting 'at a time' into the von neuman computing arena or
-perhaps bandwidth allowance) then it's hard to say (as video requires
-more bytes per sense-time).
-to summarize, mic inputs convey a) one's voice (it's part of why people
-fall in love..), b) words and sentences; semantic content; formal
-(or informal) facts (already in propositional form) (depending on the
-the theoretical limits for AI speech recognition), c) intonation and 
emphasis
-of those words (largely requires understanding of the psyche for
-interpretation). but i'm not going to say that a computer can necessarily
-understand psyche (or one's voice); it's cosmic.
-also, words can express facts from anywhere at any time.  video
-expresses an event or a state at one particular place at one
-one particular time.  so, even though the facts of words are
-compressed (assimilated semiotically, symbolic, serialized), they can
-give you a lot more factual context on a global scale with which
-to understand the behavior of people everywhere, and moreso their
-words, such as the words in this newsgroup, which you like to participate 
in.

And what results are on video summaries are there so far?  I would
start with difference primitives on video.  How does the same work for
voice?

-i don't understand the last two sentences.
-as for video you should understand solidity, classical mechanics and
-perspective to get some sort of objectivity in its interpretation. perhaps
-color also.  (the next higher level of contextual understandig/objectivity
-can only come from words and/or the "cross-sum" of countless videos.
-try an encyclopedia.)

Of course, human understanding may come across the difference in form
of artifacts of hardware, but of course, the crossing operation is non-
trivial to perform, audio and video.  I'm not mentioning smell because
crossing it sounds risky.  Whaddya know.

-risky? interesting.  how would you get smell input anyway?

Now creation and recreation *decompose* into creation and time, spec.
real iteration., but where I'm from, creation and time are known to
cross means; if I have inferred correctly so far, you want a computer
to recreate.  If so, you want creation in act to tell a story.  I
think it's more fun to make them up than tell computers, and if we're
by them, can we tell a story on a newsgroup?  Who understands best in
the cross-sum of { Newsgroup, Newsgroup + task, Computer }?  Who wants
to define cross-sum?

-you're the only one fusing newsgroups and computers.  and i'm the only
-one that's paying attention, so i guess the answer is either you, or I.
-you're asking /us/ to define cross-sum? suspiciously flippant. ;)

---
To those who don't want me to feed the bot, I'm sorry.  It's not a bot, and 
I don't know the policy on having philosophical conversations.








From lixinyi.23 at gmail.com  Thu May 29 02:47:29 2008
From: lixinyi.23 at gmail.com (lixinyi.23 at gmail.com)
Date: Wed, 28 May 2008 23:47:29 -0700 (PDT)
Subject: How to get all the variables in a python shell
Message-ID: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>

Hi!

I'm currently working on a scientific computation software built in
python.
What I want to implement is a Matlab style command window <->
workspace interaction.

For example, you type 'a=1' in the command window, and you see a list
item named 'a' in the workspace.
You double click the icon of the item, and you see its value. You can
modify the value of the list item,
1 -> 100 etc,  after which if you go back to the command window and
type 'a'  and press enter, you see that
varable a's value has been changed to 100.

So my question is : if you have two DOS command windows running under
WINDOWS OS, how can you make them share the same internal variable
buffer? Or is there any easier way to implement such kind of
interaction?

Maybe I could just build a small database to store all the values and
access them from both programs, but chances are sometimes I have to
deal with big arrays, and they will eat extra memory if I keep them in
a database. Is there anyway to access a shell's local memory buffer?
I tried to use shell.interp.locals() in wxPython, but there's too many
variables in the list which I don't actually need.

Come on guys, give me some ideas. Thanks in advance!


From duncan.booth at invalid.invalid  Fri May 30 03:27:33 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 May 2008 07:27:33 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
Message-ID: <Xns9AAE5603C921Bduncanbooth@127.0.0.1>

"D'Arcy J.M. Cain" <darcy at druid.net> wrote:

> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?
> 
A minor point of netiquette: it's fine to reply by email to a message if 
you want to make a point off group, but if you are following up to the 
newsgroup/mailing list please don't CC the original sender: they will see 
the message in any case on the newsgroup and getting it twice is just 
likely to annoy.

I don't understand your problem: it's just a single thread so killfile or 
skip it.

-- 
Duncan Booth http://kupuguy.blogspot.com


From kapoornir at gmail.com  Mon May  5 20:23:07 2008
From: kapoornir at gmail.com (Rakhi)
Date: Mon, 5 May 2008 17:23:07 -0700 (PDT)
Subject: Python Programmer position available in New York
Message-ID: <62503df2-3e7e-43b7-8900-71bea747ee0b@f24g2000prh.googlegroups.com>


Title: Python Programmer
Location: Orangeburg, NY 10962
6 months position

Roles and responsibilities:-

?         Designs and codes from specifications, analyzes, evaluates,
tests, debugs, documents, and implements moderately complex software
applications. Prepares detailed specifications.

 ?         Provide programming skills to augment team capacity.
Project consists of coding and deploying new version of in-house web
based applications to new production platform.

?         Skills required include - substantial object oriented
programming knowledge, substantial web based programming experience,
solid working knowledge of python programming language, experience
with apache web server, web frameworks (e.g. cherry py) , and linux/
unix operating system Experience with telecommunications services or
equipment is a plus.

?         Candidate will need work with the existing team and interact
with the BA/QA personnel.

?         Skills: Python, Apache, Linux/ Unix Operating system



Please email your resume to the below mentioned email.


Regards,
Rakhi Kapoor |
Direct: 212-381-0614 |
Email: rakhi.kapoor at mastech.com | Web: www.mastech.com |
1000 Commerce Drive, Suite 500 | Pittsburgh, PA 15275 |



From kyrie at uh.cu  Thu May  8 19:14:06 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 8 May 2008 19:14:06 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <200805081914.06459.kyrie@uh.cu>

On Thursday 08 May 2008 06:54:42 pm wxPythoner at gmail.com wrote:
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.

Actually, I've always written it as (-123)**0. At least where I'm from, 
exponentiation takes precedence even over unary "-". (to get a power of -123, 
you must write $(-123)^0$ [latex])

Though not an authoritative source, wikipedia also uses the (-x)^y notation:
http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one

Btw, there seems to be a math problem in python with exponentiation... 

>>> 0**0
1

That 0^0 should be a nan or exception, I guess, but not 1.

[just found out while trying the poster's example]

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From space.captain.face at gmail.com  Thu May 29 04:44:53 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 01:44:53 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>

On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

You can use the cmp(x, y) function to tell if a string is similar to
another.

going cmp('spam', 'eggs') will return 1 (spam is greater than eggs)
(have no idea why)
swapping the two give -1
and having 'eggs' and 'eggs' gives 0.

is that what you were looking for?


From deets at nospam.web.de  Sat May 24 10:20:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 16:20:26 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
Message-ID: <69qmhcF33pou1U1@mid.uni-berlin.de>

Tool69 schrieb:
> Hi,
> 
> Until now, I was running my own static site with Python, but I'm in
> need of dynamism.
> 
> After reading some cgi tutorials, I saw Joe Gregorio's old article
> "Why so many Python web frameworks?" about wsgi apps [http://
> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
> question about it. The code he gave works like a charm (I had to make
> a little change because SQLAlchemy has changed since), but how the
> hell can I serve static files (css, js, images, etc.) within an wsgi
> app, ie inside a '/static' directory ?!

There is a wsgi-app out there that is called "static". Use that.

And it's the first hit on google "wsgi static"... :)

http://lukearno.com/projects/static/

Diez


From ivan.illarionov at gmail.com  Thu May 22 16:02:13 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 22 May 2008 20:02:13 +0000 (UTC)
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<5PjZj.78772$%15.70394@bignews7.bellsouth.net>
Message-ID: <g14jg5$3104$1@news.mtu.ru>

On Thu, 22 May 2008 15:29:42 -0400, inhahe wrote:

> "Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message
> news:5RiZj.165543$ng7.151222 at en-nntp-05.dc1.easynews.com...
>> Is there an easy way to get a list comprehension to produce a flat list
>> of, say, [x,2*x] for each input argument?
>>
>> E.g., I'd like to do something like:
>>
>> [ [x,2*x] for x in range(4) ]
>>
>> ...and receive
>>
>> [ 0,0,1,2,2,4,3,6]
>>
>> ...but of course you really get a list of lists:
>>
>> [[0, 0], [1, 2], [2, 4], [3, 6]]
>>
>> I'm aware I can use any of the standard "flatten" bits of code to turn
>> this back into what I want, but I was hoping there's some way to avoid
>> the "lists of lists" generation in the first place?
>>
>> A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
>> with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
>> with "zip" to do so?
>>
>> Thanks,
>> ---Joel
>>
>>
> i figured out a solution
> 
> sum([x,2*x] for x in range(4)],[]) #not tested sum(zip(list1,list2),())
> #not tested
> 
> (you did say you knew of ways to flatten, but i dunno if you knew of
> that way or not)
> 
> as an aside, i wish that sum didn't have to take the second parameter.
> it's kind of superfluous.  it can just use the first item as the initial
> value instead of 0 when no initial value is specified.   it would be a
> little complex to do without putting a conditional in your main loop and
> slowing it down, but it could be done.


If you don't want the second parameter use reduce():

>>> reduce(operator.add, ([x, x*2] for x in xrange(4)))
[0, 0, 1, 2, 2, 4, 3, 6]

>>> reduce(operator.add, zip([1,2,3],[4,5,6]))
(1, 4, 2, 5, 3, 6)

or:
>>> reduce(lambda x, y: x.extend(y) or x, ([x, x*2] for x in xrange(4)))
[0, 0, 1, 2, 2, 4, 3, 6]

-- Ivan


From castironpi at gmail.com  Wed May  7 16:40:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 13:40:31 -0700 (PDT)
Subject: howto print binary number
References: 021f52a9-4d18-4e0a-acdd-3a08cca4a4e5@z72g2000hsb.googlegroups.com
Message-ID: <ce84a847-d200-4fb8-af2c-aed0c03954ee@b1g2000hsg.googlegroups.com>

On May 7, 3:31?pm, Mensanator <mensana... at aol.com> wrote:
> On May 7, 3:13?pm, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > hi all,
> > could you inform how to print binary number?
> > I.e. something like
>
> > print '%b' % my_number
>
> > it would be nice would it print exactly 8 binary digits (0-1, with
> > possible start from 0)
>
> > Thank you in advance, D
>
> The gmpy works good.
>
> >>> import gmpy
> >>> print gmpy.digits(66,2).zfill(8)
>
> 01000010

>>> print '\n'.join( [ ''.join( [ str( a>> i & 1 ) for i in range( 7, -1, -1 ) ]
 ) for a in range( 10 ) ] )
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00000111
00001000
00001001


From dgetsman at amirehab.net  Wed May 21 12:12:52 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 09:12:52 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
Message-ID: <c4f8c979-2385-474d-b221-3fb48ed2ee21@e39g2000hsf.googlegroups.com>

Okay, so I manged to kludge around the issue by not using
the .readline() in my 'for' statement.  Instead, I'm slurping the
whole file into a new list that I put in for that purpose, and
everything seems to be working just fine.  However, I don't know WHY
the other method failed and I'm at a loss for why that didn't work and
this is working.  I'd really like to know the why about this issue so
that I don't have to use crappy coding practice and kludge around it
the next time I have an issue like this.

Any ideas much appreciated.

Damon G.


From thorsten at thorstenkampe.de  Fri May  2 09:51:53 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Fri, 2 May 2008 15:51:53 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
Message-ID: <MPG.22853ae1f293060998975a@news.individual.de>

* Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> The OP was asking why people prefer on over the other. My answer is
> that I prefer specifying "give me the default OS Python" because
> anything not installed by the OS is to non-standardised for me to
> worry about.
> 
> Others may prefer something different, but then they get to wear
> whatever problems occur as a result of that choice. I continue to be
> bemused by that preference, and nothing that I've seen so far in this
> thread illuminates the issue more.

You're missing the point. Apart from the really dubious terms you use 
("OS installable package"), using env in the first line has exactly the 
effect to use the default path of Python (which is the first entry in 
your path) and not some hard-coded path (which might not even exist).

Thorsten


From gherron at islandtraining.com  Thu May  8 11:17:48 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 08 May 2008 08:17:48 -0700
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <4823199C.6060308@islandtraining.com>

Raxit at MyKavita.com wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>   
With Python, you can program with a smile on your face.

(Truly, when I found Python, programming became fun again.)

Gary Herron
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From yves at zioup.com  Thu May  1 23:01:10 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 03:01:10 GMT
Subject: help with list comprehension
Message-ID: <WtvSj.108013$Cj7.100899@pd7urf2no>


In the following script, m1() and m2() work fine. I am assuming m2() is 
faster although I haven't checked that (loops through the list twice instead 
of once).

Now what I am trying to do is something like m3(). As currently written it 
does not work, and I have tried different ways, but I haven't managed to 
make it work.

Is there a possibility ? Or is m2() the optimum ?


Thanks.



#!/usr/bin/python

l = [ { 'colour': 'black',   'num': 0},
       { 'colour': 'brown',   'num': 1},
       { 'colour': 'red',     'num': 2},
       { 'colour': 'orange',  'num': 3},
       { 'colour': 'yellow',  'num': 4},
       { 'colour': 'green',   'num': 5},
       { 'colour': 'blue',    'num': 6},
       { 'colour': 'violet',  'num': 7},
       { 'colour': 'grey',    'num': 8},
       { 'colour': 'white',   'num': 9}
     ]

def m1():
   colours = [ e['colour'] for e in l ]
   nums    = [ e['num']    for e in l ]

def m2():
   colours = []
   nums    = []
   for e in l:
     colours.append(e['colour'])
     nums.append(e['num'])

#def m3():
#  colours, nums = [ e['colour'], e['num'] for e in l ]





-- 
Yves.
http://www.SollerS.ca


From vijayakumar.subburaj at gmail.com  Thu May  8 03:06:06 2008
From: vijayakumar.subburaj at gmail.com (v4vijayakumar)
Date: Thu, 8 May 2008 00:06:06 -0700 (PDT)
Subject: python newbie: some surprises
Message-ID: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>

When I started coding in python, these two things surprised me.

1. my code is inconsistently indented with the combination of tabs and
spaces. Even lines looked intended, but it is not.

2. python requires to pass "self" to all instance methods

and I missed ":" often. :)


From temmokan at gmail.com  Sat May 24 02:45:04 2008
From: temmokan at gmail.com (Sagari)
Date: Fri, 23 May 2008 23:45:04 -0700 (PDT)
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com> 
	<4836b62b$0$24427$426a74cc@news.free.fr>
	<slrng3dfn3.7jn.nick@irishsea.home.craig-wood.com>
Message-ID: <5de30ef7-d9a2-493b-bc43-665339f52cd8@m3g2000hsc.googlegroups.com>

Thanks to everyone for the advice. In fact, since all the called
methods trap necessary exceptions, I see no big problems with that.

With all respect,

Konstantin


From deets at nospam.web.de  Thu May  8 06:48:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 12:48:39 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
Message-ID: <68g456F2t41nqU1@mid.uni-berlin.de>

krustymonkey at gmail.com wrote:

> I'm wondering if anyone can help with a workaround for a problem I
> currently have.  I'm trying to set up a prefork tcp server.
> Specifically, I'm setting up a server that forks children and has them
> listen on pipes created with os.pipe().  The parent process for the
> group starts an inet:tcp server on a given port.  In the parent, after
> a "socket.accept()", I'm trying to pickle the connection object to
> send over an IPC pipe (as stated previously), but I get the following
> error:
> 
> File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
>     raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining
> __getstate__ cannot be pickled
> 
> Does anyone know of a workaround for this?  Maybe my approach to this
> is wrong?  Any help would be appreciated.

The error-message is pretty clear I'd say. You use slots - so you are
responsible yourself for implementing the pickling-protocol using
__getstate__ and __setstate__. Looking at the pickle-docs should give you
an idea.

But the really easy solution is: do not use slots. They are intended as
memory-consumption optimization technique, *not* as "I want to declare my
attributes explicitly"-mechanism. So - get rid of them and be a happy
pickler.

Diez


From ivan.illarionov at gmail.com  Thu May  1 16:50:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 20:50:32 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
Message-ID: <fvdaen$1g2$2@news.mtu.ru>

On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:

> On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
>> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
>> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> >> > IMO .ini-like config files are from the stone age. The modern
>> >> > approach is to use YAML (http://www.yaml.org).
>>
>> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
>> >> and so comprehensively and completely fails to achieve its stated
>> >> main goal of being "readable by humans", that I had assumed it was
>> >> an April Fool along the lines of Intercal or brainf***.
>>
>> > YAML, ISTM, took a simple concept that worked for small,
>> > straightforward data, and tried to make into a format that could
>> > anything anywhere, with disastrous results.  It's not unlike Perl in
>> > this regard.  It's quite ridiculous.
>>
>> > My recommendation to the OP would be:
>>
>> > If you intend to write a GUI that completely sets all the options,
>> > use XML.  You can bet there are some users who would prefer text
>> > editing options files, and XML, while not the most readable format
>> > available, at least gives users the option.
>>
>> > If you don't intend to write a GUI to do that, write a simple text
>> > file parser (if the options are simple), use ConfigParser, or use a
>> > Python file that you exec.
>>
>> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
>> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
>> > using the Windows registry to store options; use it to modify Windows
>> > behavior (like file associations) but keep your own program's options
>> > in your own file.
>>
>> If you don't like YAML, use JSON or something similar -- XML is
>> overkill and .INI is too limited.
> 
> 
> I don't think you know the OP's requirements enough to know whether INI
> or XML is suitable. You're welcome to suggest alternatives but what I
> suggested is fine.
>
> As for XML being overkill for anything, I highly disagree. XML is
> suitable for the smallest tasks.  These days I use XML for almost all my
> data exchange needs: including conf files.  Elementtree makes it
> possible to process XML and pull out some typical data in ten or so
> lines of code.  What could possibly be overkill about that?
> 
> 
> Carl Banks

I used XML for almost everything in the past until I found YAML. 
Elementtree makes it easy but not easy enough. The most powerful thing 
about YAML is that it was designed to map directly to native data types 
in languages like Python (see another my post in this thread for 
example). And this means that simple YAML files will always be easier to 
process in Python than XML or INI. And this in turn means that OP with 
any requirements will have to write less code to read and write his 
config files.

-- 
Ivan


From bbxx789_05ss at yahoo.com  Sun May 11 15:06:30 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:06:30 -0700 (PDT)
Subject: Problem with custom events in wxpython
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
Message-ID: <223951e8-fb2f-44e8-b416-6cea30cfc66c@24g2000hsh.googlegroups.com>

On May 11, 7:23?am, Jimmy <mcknight0... at gmail.com> wrote:
> hi, all
>
> I'm having a problem with creating custom events in wxpython.
>
> I have a class A handling some data processing work and another class
> B of GUI matter. I need GUI to display information when data in A is
> updated.
> I know cutom events in wxpython may work. But I found no material
> paricularly
> helpful :(
>
> can anyone write me some demo code to show how to do this ...


This example works for me:


import wx

class MyCustomEvent(wx.PyCommandEvent): #or wx.PyEvent
    def __init__(self, event_type, id):
        wx.PyCommandEvent.__init__(self, event_type, id)

class A(object):  #Data Processing class
    def __init__(self, widget_to_update):
        self.widget_to_update = widget_to_update

        #create the custom event:
        self.my_event_type = wx.NewEventType()
        self.EVT_MY_CUSTOM_EVENT =
wx.PyEventBinder(self.my_event_type, 1)
	#Note: you need to make EVT_MY_CUSTOM_EVENT persist so that you
        #can refer to it in a later call to Bind()

    def process_data(self): #create thread here
        finished = True

	if finished:
            self.update_gui()


    def update_gui(self):
        #create a custom event object and enter it in the event queue:
        my_evt_obj = MyCustomEvent(self.my_event_type,
self.widget_to_update.GetId() )
 
self.widget_to_update.GetEventHandler().ProcessEvent(my_evt_obj)


class B(object):  #Gui class
    def __init__(self):
        frame = wx.Frame(None, -1, "My Window")

        panel = wx.Panel(frame, -1)
        button = wx.Button(panel, -1, "Start Data Processing",
pos=(100, 10))
        button.Bind(wx.EVT_BUTTON, self.onclick)

        self.text_ctrl = wx.TextCtrl(panel, -1, "Hello World",
pos=(100, 50), size=(200, 20))

        self.a = A(self.text_ctrl)
        frame.Bind(self.a.EVT_MY_CUSTOM_EVENT,
self.on_my_custom_event)

        frame.Show()

    def onclick(self, event):
        self.a.process_data()

    def on_my_custom_event(self, event):
        self.text_ctrl.SetValue("Finished Processing Data")


app = wx.PySimpleApp(redirect=False)
b = B()
app.MainLoop()




However, I couldn't get similar code to work when I derived the event
class from wx.PyEvent and used Bind() directly on the TextCtrl
(command events propagate up the container hierarchy while regular
events don't):

import wx

class MyCustomEvent(wx.PyEvent): #or wx.PyEvent
    def __init__(self, event_type, id):
        wx.PyEvent.__init__(self, event_type, id)

class A(object):  #Data Processing class
    def __init__(self, widget_to_update):
        self.widget_to_update = widget_to_update

        #create the custom event:
        self.my_event_type = wx.NewEventType()
        self.EVT_MY_CUSTOM_EVENT =
wx.PyEventBinder(self.my_event_type, 1)

    def process_data(self): #create thread here
        finished = True
        if finished:
            self.update_gui()


    def update_gui(self):
        #create a custom event object and enter it in the event queue:
        my_evt_obj = MyCustomEvent(self.my_event_type,
self.widget_to_update.GetId() )
 
self.widget_to_update.GetEventHandler().ProcessEvent(my_evt_obj)


class B(object):  #Gui class
    def __init__(self):
        frame = wx.Frame(None, -1, "My Window")

        panel = wx.Panel(frame, -1)
        button = wx.Button(panel, -1, "Start Data Processing",
pos=(100, 10))
        button.Bind(wx.EVT_BUTTON, self.onclick)

        self.text_ctrl = wx.TextCtrl(panel, -1, "Hello World",
pos=(100, 50), size=(200, 20))

        self.a = A(self.text_ctrl)
        self.text_ctrl.Bind(self.a.EVT_MY_CUSTOM_EVENT,
self.on_my_custom_event)

        frame.Show()

    def onclick(self, event):
        self.a.process_data()

    def on_my_custom_event(self, event):
        self.text_ctrl.SetValue("Finished Processing Data")

app = wx.PySimpleApp(redirect=False)
b = B()
app.MainLoop()


From jstucklex at attglobal.net  Sun May 25 15:07:09 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 15:07:09 -0400
Subject: php vs python
In-Reply-To: <68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
Message-ID: <1oydnYcMZLpzJaTVnZ2dnUVZ_r-dnZ2d@comcast.com>

Ivan Illarionov wrote:
> Jerry Stuckle wrote:
>> Lie wrote:
>>> On May 22, 12:28 pm, NC <n... at iname.com> wrote:
>>>> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>>>>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
>>>>> Yet, I want learn the guts of it instead of just booting up some
>>>>> wordwank or whatever.
>>>> Here's a simple computation to consider...  WordPress' codebase is
>>>> approximately a megabyte of PHP code and megabyte of JavaScript code.
>>>> Assuming that the average line of that code is 50 characters long, you
>>>> are looking at 20,000 lines of code in PHP and as many in JavaScript.
>>>> Based on the notion that the average developer out there writes 100
>>>> lines a day, either you're in for a two-year project or your product
>>>> is going to have seriously reduced functionality compared to something
>>>> that's been freely available for years.  What's your choice?
>>> Nope, the core functionality of a blogging software could be
>>> replicated in just a few lines of PHP codes, in the range of tens to
>>> hundreds of lines. If you're creating your own blogging software, you
>>> wouldn't seriously think you'd recreate all those things such as
>>> pingbacks, commenting system, etc, etc, etc. No, you'd start with some
>>> basic core functionalities: a few simple server side includes only.
>> As he said - it's either a two man-year project or your product is going
>> to have seriously reduced functionality.  It looks like you are opting
>> for the latter.
>>
>> Also, you still need to write the server-side includes.  But they won't
>> do nearly enough for everything WordPress does.
> 
> If the OP wants to learn the guts of the blog or to implement the blog
> from scratch, Python/Django would be a better choice than PHP. The
> reason is that he can reuse and customize existing high quality
> components for all these auth/auth, admin, comments, etc, etc, etc.
> Another reason is that Python and Django encourage very clean design
> while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
> PHP wrapped in spaghetti HTML". 2 man/year in PHP == 2 man/week in
> Python/Django.
>

You can do the same in PHP.  And PHP doesn't create spaghetti code - 
programmers do.  Good programmers write good code in any language.  Poor 
programmers write lousy code - in any language.

And I'd love to see you write WordPress in 2 weeks in Python.  That's 
about 2K LOC.  Can't be done with the same functionality - unless you 
have some 50K lines.

It's going to be very close to the same 2 man years that PHP takes.

> And there are Python/Django blog applications that already do almost
> everything (and maybe more) that WordPress does. http://byteflow.su/
> is one of them (IMHO the most promising).
> 
> Ivan
> 

And there are many CMS's written in PHP which do much more than 
WordPress does.  Drupal, Joomla and Mambo come to mind.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From raxitsheth2000 at gmail.com  Fri May 16 03:16:47 2008
From: raxitsheth2000 at gmail.com (Raxit@MyKavita.com)
Date: Fri, 16 May 2008 00:16:47 -0700 (PDT)
Subject: how to set python hosting !
Message-ID: <ef823a8f-9cb7-4e39-b9ad-e08754eb5ec5@n1g2000prb.googlegroups.com>

Hi,

i do have some basic python know-how. i want to tryout by actually
implementing some python generated dynamic page etc.

i am having websetup which runs with mysql on linux, and pythong is
installed on it.

so is there any ref. from where i can know how to configure my
webserver for python.


-Raxit


From pavlovevidence at gmail.com  Thu May 29 02:55:46 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 28 May 2008 23:55:46 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
References: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>
Message-ID: <5d7a0971-5b7a-4b52-bd49-484238331c9a@m44g2000hsc.googlegroups.com>

On May 28, 7:41 pm, blaine <frik... at gmail.com> wrote:
> Hey everyone,
>   Just a friendly question about an efficient way to do this.

Friendly advance reminder: in many optimization problems, the
objective function is far more expensive to calculate than the
optimizing procedure.  Your time is usually better spent optimizing
the objective function, or tuning the optimizer.

But what they hey.

> I have
> a graph with nodes and edges (networkx is am amazing library, check it
> out!).  I also have a lookup table with weights of each edge.  So:
>
> weights[(edge1, edge2)] = .12
> weights[(edge2, edge5)] = .53
> weights[(edge5, edge1)] = 1.23
> weights[(edge3, edge2)] = -2.34
> etc.
>
> I would like to take this weight table and subject it to evolutionary
> mutations.  So given a probability p (mutation rate), mutate edge
> weights by some random value.   So in effect, if p is .25, choose 25%
> random edges, and mutate them some amount.  So:
> 1.  Whats a good way to get the keys? I'm using a loop with
> random.choice() at the moment.

That's probably the best way.

You might be able to squeeze a little more speed out of it by using a
partial random shuffle as opposed to removing the item from the list.
This will minimize the amount of copying.  Here's an example (without
error checking):

def partial_random_shuffle(lst,nshuffled):
    for i in xrange(nshuffled):
        j = random.randrange(i,len(lst))
        t = lst[i]
        lst[i] = lst[j]
        lst[j] = t

The first nshuffled items of lst upon return will be the selected
items.  Note: This might also be slower than removing items.  It
should scale better, though.


> 2.  Any comments on how to get a 'fair' mutation on an existing edge
> value?

random.normalvariate is usually a good choice for selecting random
real-valued increments.

val = random.normalvariate(val,sigma)

where sigma, the standard deviation, is the amount


> I currently am doing something like this, which seems like it leaves
> something to be desired.
>
> import random
> weights = generateweights() # generates table like the one above
> p = 0.25
> v = random.betavariate(2, 10)
> num = int(v*len(weights)) # How many weights should we mutate?
> keys = w.keys()
> for i in xrange(num):
>   val = random.choice(keys) # Choose a single random key
>   w[val] = w[val]*(random.random()*5-1) # Is this a 'good' way to
> 'mutate' the value?

If you don't remove keys[val], there's a chance you'll mutate the same
key twice, which I doubt is what you want.


> This is an evolutionary search, so mutate in this sense relates to a
> genetic algorithm, perhaps a gradient decent?

A gradient descent method is not an evolutionary search and involves
no randomness (unless noise is added to the objective, which is a
possible way to attack a function with unimportant small scale
features, and in that case normalvariate would be the thing used).



Carl Banks


From dullrich at sprynet.com  Sat May 24 07:33:21 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:33:21 -0500
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
	<9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>
	<5196bcc1-e840-456f-ac4d-a3841445362f@y38g2000hsy.googlegroups.com>
Message-ID: <h3vf34lkgtlrlv7u2tdt9as3ha96r76tb9@4ax.com>

On Fri, 23 May 2008 06:40:13 -0700 (PDT), Gandalf <goldnery at gmail.com>
wrote:

>On May 23, 3:29 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>> On May 23, 8:24 am, Gandalf <goldn... at gmail.com> wrote:
>>
>> > I try to reach a specific wx StaticText element's text and to change
>> > it by clicking on a button
>>
>> > now let's say the this is my element:
>>
>> > wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>>
>> > And this is my EVT_BUTTON bind function :
>>
>> > def OnClick(event):
>>
>> > which code shude i enter to change "hello" to "goodbay"?
>>
>> > thanks
>>
>> You're probably looking for SetLabel(). So if you do something like
>> this to instantiate the StaticText:
>>
>> self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
>> style=wx.ALIGN_CENTRE)
>>
>> Then you can change your text by adding this to your OnClick event
>> handler:
>>
>> self.myText.SetLabel("goodbye")
>>
>> Have fun! And remember, there's a great wxPython mailing list too:
>>
>> http://www.wxpython.org/maillist.php
>>
>> Mike
>
>Thanks!

You should also note

docs.wxwidgets.org

(I tend to find that by googling "wxTreeCtrl" or whatever.)
The descriptions of various components there are more 
complete than in the (excellent!) wxPython book - it's
C++ but usually not hard to figure out what the corresponding
wxPython should be.

David C. Ullrich


From buzzard at urubu.freeserve.co.uk  Fri May 23 10:25:39 2008
From: buzzard at urubu.freeserve.co.uk (duncan smith)
Date: Fri, 23 May 2008 15:25:39 +0100
Subject: Misuse of list comprehensions?
In-Reply-To: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
	<48340938$0$10773$426a74cc@news.free.fr>
	<e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
Message-ID: <g16k7o$d6$1@energise.enta.net>

Simon Forman wrote:
> On May 21, 4:36 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Simon Forman a ?crit :
>>
>>
>>
>>> On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
>>>> On May 20, 10:50 am, s0s... at gmail.com wrote:
>>>>> You don't need all those conditionals. A set differs from a list
>>>>> precisely in the fact that each element is unique. And since the
>>>>> function is expecting "s" to be an iterable object, it can be
>>>>> constructed even without a for loop:
>>>>> def compress(s):
>>>>>     return list(set(s))
>>>>> That does the trick.
>>>> Only if order does not need to be maintained.  list(set(s)) will not
>>>> necessarily keep the unique characters in the order they are seen.
>>>> We'll have to check with the OP to see if this is important (I just
>>>> assumed that it was because of the use of list comps).
>>>> -- Paul
>>> If order is important, you can use sorted() instead of list() like so:
>>> def compress(s):
>>>     new = sorted(set(s), key=s.index)
>>>     return return ''.join(new)
>> This won't still preserve the *original* order.
> 
> 
> I don't understand.
> 
> new will contain each unique item in s, sorted in order of the items'
> first occurance in s, right?
> There are other ways to do it (other functions that could be passed to
> sorted() as the key arg) of course, but this seems like a good value
> of "original order", no? :)
> 
> Regards,
> ~S

But, I think, worst case quadratic performance through generating all 
the indices.

Duncan


From Graham.Dumpleton at gmail.com  Thu May  1 19:13:57 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 1 May 2008 16:13:57 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.432.1209678316.12834.python-list@python.org>
Message-ID: <b99f71ed-4279-4412-82d0-b2a8ef6a4a87@j33g2000pri.googlegroups.com>

On May 2, 7:45 am, Christian Heimes <li... at cheimes.de> wrote:
> jmDesktop schrieb:
>
> > I have been to the main python site, but am still confused.  I have
> > been using .net, so it may be obvious how to do this to everyone
> > else.  I am aware there are various frameworks (Django, Pylons, etc.),
> > but I would like to know how to create web pages without these.  If I
> > havemod_pythonor fastcgi on apache, where do I start?  I don't have
> > clue where to begin to create a web page from scratch in python.  I am
> > sure I will want to access database, etc., all the "normal" stuff, I
> > just want to do it myself as opposed to the frameworks, for learning.
>
> I highly recommend WSGI instead ofmod_pythonor (fast)cgi. I've heard
> only bad things aboutmod_pythonover the past years and CGI is totally
> old school.
>
> Check out Python Paste, CherryPy and Django. You can also try the Zope,
> Zope3 and Plone world but Zope is usually for larger and complex
> applications.
>
> Most frameworks come with their own little web server for development, too.

I'd also suggest avoiding coding anything directly to mod_python and
instead base things on WSGI. You can still run it on mod_python with a
suitable adapter, but you can also run it with mod_wsgi, mod_fastcgi,
or using pure Python web servers such as the one in Paste as well.

For a low level nuts and bolts (anti framework) approach I'd suggest
looking at:

  http://dev.pocoo.org/projects/werkzeug/

This gives you all the basic components, but it is really up to you as
to how you put them together, which seems to be what you want to be
able to do.

Graham



From bj_666 at gmx.net  Tue May 20 02:45:20 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:45:20 GMT
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
Message-ID: <69fac0F2uih6aU3@mid.uni-berlin.de>

On Mon, 19 May 2008 15:28:48 -0700, notnorwegian wrote:

> ' '.join([`x  x` for x in range(1, 6)])
> 
> anyone can tell me what im doing wrong?

I doubt that this worked before because that's a syntax error:

In [84]: ' '.join([`x  x` for x in range(1, 6)])
------------------------------------------------------------
   File "<ipython console>", line 1
     ' '.join([`x  x` for x in range(1, 6)])
                   ^
<type 'exceptions.SyntaxError'>: invalid syntax

The backticks are syntactic sugar for the `repr()` function and
``repr(x x)`` isn't legal syntax either.

Ciao,
	Marc 'BlackJack' Rintsch


From tjreedy at udel.edu  Sun May 11 16:38:11 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 16:38:11 -0400
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
	<7xbq3dfj0c.fsf@ruckus.brouhaha.com>
Message-ID: <g07lfh$6qk$1@ger.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7xbq3dfj0c.fsf at ruckus.brouhaha.com...
| philly_bob <b0bm00r3 at gmail.com> writes:
| > algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
| > accs=[]
| > for alg in algs:
| >    thisacc=getattr(alg.accuracy)()
|> # picked this technique on comp.lang.python last month

I don't believe that you actually ran this.
What you should have picked up for the above was something like
globals()[alg].accuracy().  What you probably saw was something
like getattr(ob_with_call_attr, 'callable_name')().
But a list of alg objects instead of names, as Paul suggested,
is almost always better.

| >    accs.append(thisacc)

| I think what you mean is (untested):
|
|     algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
|     accs = sorted(((alg.accuracy(), alg.name()) for alg in algs), 
reverse=True)

Use alg.__name__ instead of alg.name().

|     for i,(alg_acc, alg_name) in enumerate(accs):
|        print '%2d %5s %0.2f'% (i, alg_name, alg_acc)
|
| This assumes a method alg.name() which tells you the name of the 
algorithm.

See above.  In 3.0, function names are also .__name__ instead of 
.func_name,
so one can mix callables in a list and get their definitions names 
uniformly.

| I don't understand how you're converting the string 'AlgA'
| to an algorithm object in your example above.

He was trying to convert name to method with the buggy getattr call.

tjr






From notnorwegian at yahoo.se  Mon May 26 15:02:24 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 12:02:24 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
Message-ID: <34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>

On 26 Maj, 20:57, miller.pau... at gmail.com wrote:
> On May 26, 2:34 pm, notnorweg... at yahoo.se wrote:
>
> I wanted to address some other points I failed to mention in my first
> response.
>
> > so are they fundamentally differently built or is it just a lot of
> > lowlevel operations built on top of each other?
>
> Partly.  A high-level language is essentially one that gives you high-
> level operations, like "apply the function f to each element of the
> sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].
>
> But, it's more than that.  (You use Haskell as your example, but I'll
> use Python because I know it roughly a million percent better than
> Haskell... hehe.)  In Python, you have support from the language to
> treat functions as first-class objects; in C, you explicitly cannot do
> this -- to map an arbitrary function over a sequence, you're
> restricted to accessing the function through a pointer.  On the
> surface, it's the same operation, but that extra level of indirection
> can really bog one's mind down.  Think about how difficult it is for a
> human to interpret the declaration of a function pointer in C, for
> instance.
>
> > haskell is considered a very highlevellanguage but can you do
> > systemsprogramming with it(yes maybe it is very unpractical i dont
> > know but can you)?
> > is lambda calculus a more abstract and efficient way of modeling a
> > computer?
>
> Lambda calculus doesn't model computers.  It models *computation*.
> That is, given a Turing machine, there's a set of functions in the
> lambda calculus, which, when suitably combined, will yield the exact
> same result as the original Turing machine.  That doesn't in any way
> imply that Turing machines work by interpreting lambda calculus.
>
> > how did lispmachines work? was the basic system programmed in LISP?
>
> Yes, the whole kit and kaboodle, all the way down to the microcode was
> programmed in LISP.  In principle, there's no reason we couldn't have
> Haskell machines or Python machines.  It's just that nobody's been
> crazy enough to do it, that I know of. :-)


what is crazy about it?

in the same way programming webapps in C would be annoying because you
have to do a lot of lowlevel tasks it is dumb to program computer ina
highlevellanguage because you dont have direct access to lowlevel
tasks meaning you cant program it very efficiently, ie make it fast?


From mathieu.prevot at ens.fr  Wed May 28 08:11:51 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Wed, 28 May 2008 14:11:51 +0200
Subject: Flash Decoder
In-Reply-To: <0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
	<0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
Message-ID: <3e473cc60805280511o6cf0e639lfdfc2d1ea8902300@mail.gmail.com>

2008/5/28 Ankit <ankitanand1986 at gmail.com>:
> Thanks for replying guys but could you be a little more specific like
> in terms of steps i shd follow to make the decoder and also how is
> ffmpeg/libffmpeg going to help..

You can start by getting familiar with ffmpeg [1] by playing with it
and glance at its libraries (I call them libffmpeg, but they have
their specific name) allow you to do. Keep in mind that libraries
contain frequently used functions and are written so they can be
reused, shared by other/news softwares eg. the one you want. Start by
opening a flash video eg one .flv [2] file from youtube with a first
python script that use the right component(s) of libffmpeg. Python
allows you to use C libraries.

Mathieu

[1] http://ffmpeg.mplayerhq.hu/documentation.html
[2] http://en.wikipedia.org/wiki/Flv


From efurman at admailinc.com  Tue May 13 12:24:24 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 13 May 2008 08:24:24 -0800
Subject: looking for a pdf module
Message-ID: <4829C0B8.9090605@admailinc.com>

Greetings!

I'm hoping to be able to generate pdf files on the fly -- are there any 
python modules out there to do that?

All help appreciated!
--
Ethan
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From ptmcg at austin.rr.com  Wed May 14 23:47:23 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 14 May 2008 20:47:23 -0700 (PDT)
Subject: More fun with PyParsing - almost did it on my own..
References: <bba49cff-a4aa-4fb1-9f1d-1c6436275585@w8g2000prd.googlegroups.com>
Message-ID: <150b049c-2c84-481d-a2fa-6af0b7fc8ce1@f63g2000hsf.googlegroups.com>

On May 14, 6:07?pm, rh0dium <steven.kl... at gmail.com> wrote:
> Hi all,
>
> I almost did my first pyparsing without help but here we go again.
> Let's start with my code. ?The sample data is listed below.
>
> <snip...>
>
> x = ?cells.parseString(data)
> print x[0].asDict()
>
> reveals
> {'pins': ([(['A', 'Input'], {'direction': [('Input', 1)], 'name':
> [('A', 0)]}), (['B', 'Input'], {'direction': [('Input', 1)], 'name':
> [('B', 0)]}), (['Y', 'Output'], {'direction': [('Output', 1)], 'name':
> [('Y', 0)]}), (['VDD', 'Inout', 'Power'], {'direction': [('Inout',
> 1)], 'name': [('VDD', 0)], 'signal': [('Power', 2)]}), (['VSS',
> 'Inout', 'Ground'], {'direction': [('Inout', 1)], 'name': [('VSS',
> 0)], 'signal': [('Ground', 2)]})], {}), 'name': 'AND2X1', 'library':
> 'stdcell130'}
>
> As you can see the Pins is all jacked up and I want is not that. ?I
> want the following
>
> { 'name': 'AND2X1',
> ? 'library':'stdcell130'
> ? 'pins': [ { 'name': 'VSS', 'direction':'Inout', 'signal':'Ground'},
> ? ? ? ? ? ? ?{ 'name': 'VDD', 'direction':'Inout', 'signal':'Power'},
> ? ? ? ? ? ? ?{ 'name': 'A', 'direction':'Input' },
> ? ? ? ? ? ? ?{ 'name': 'B', 'direction':'Input' },
> ? ? ? ? ? ? ?{ 'name': 'Y', 'direction':'Output' } ]
>
> }
>
> What did I do wrong in my code..
>

Not a thing!  asDict() is just not very good at dumping out lists of
subdicts.  Look at the output when you iterate over the cells in x,
and the pins in each cell:

for cell in x:
    print "Name:", cell["name"]
    print "Library:", cell["library"]
    print "Pins:"
    for pin in cell["pins"]:
        print pin.asDict()
    print

Prints:

Name: AND2X1
Library: stdcell130
Pins:
{'direction': 'Input', 'name': 'A'}
{'direction': 'Input', 'name': 'B'}
{'direction': 'Output', 'name': 'Y'}
{'direction': 'Inout', 'name': 'VDD', 'signal': 'Power'}
{'direction': 'Inout', 'name': 'VSS', 'signal': 'Ground'}

Name: AND2X2
Library: stdcell130
Pins:
{'direction': 'Input', 'name': 'A'}
{'direction': 'Input', 'name': 'B'}
{'direction': 'Output', 'name': 'Y'}
{'direction': 'Inout', 'name': 'VDD', 'signal': 'Power'}
{'direction': 'Inout', 'name': 'VSS', 'signal': 'Ground'}


Now, here is a real trick.  Each pin has a unique name, and the
collection of pins can be used to define a dict using the pin names as
dynamically-defined keys.  You've laid all the ground work, all that
is needed is to define your sequence of OneOrMore(guts) as a dict
using the guts names as keys.  The only change needed is to wrap this
OneOrMore(guts) in a pyparsing Dict class - that is, change:

OneOrMore(guts).setResultsName("pins")

to:

Dict(OneOrMore(guts)).setResultsName("pins")

Now, if you iterate over each cell, you can dump out its structure:

for cell in x:
    print cell.dump()
    print

Prints:

['stdcell130', 'AND2X1', [['A', 'Input'], ['B', 'Input'], ['Y',
'Output'], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]]
- library: stdcell130
- name: AND2X1
- pins: [['A', 'Input'], ['B', 'Input'], ['Y', 'Output'], ['VDD',
'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: Input
  - B: Input
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: Output

['stdcell130', 'AND2X2', [['A', 'Input'], ['B', 'Input'], ['Y',
'Output'], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]]
- library: stdcell130
- name: AND2X2
- pins: [['A', 'Input'], ['B', 'Input'], ['Y', 'Output'], ['VDD',
'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: Input
  - B: Input
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: Output

To flesh out all fields of all pins, I suggest you add a default value
for the optional signal entry, and set the results name on the
Optional wrapper, not the quoted string.  Change:

    +
Optional(quotedString.setParseAction(removeQuotes).setResultsName("signal"))

to:

    +
Optional(quotedString.setParseAction(removeQuotes),default="").setResultsName("signal")

Now dump() called on each cell prints out:

['stdcell130', 'AND2X1', [['A', 'Input', ''], ['B', 'Input', ''],
['Y', 'Output', ''], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout',
'Ground']]]
- library: stdcell130
- name: AND2X1
- pins: [['A', 'Input', ''], ['B', 'Input', ''], ['Y', 'Output', ''],
['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: ['Input', '']
    - direction: Input
    - name: A
    - signal:
  - B: ['Input', '']
    - direction: Input
    - name: B
    - signal:
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: ['Output', '']
    - direction: Output
    - name: Y
    - signal:

Power
Input
['stdcell130', 'AND2X2', [['A', 'Input', ''], ['B', 'Input', ''],
['Y', 'Output', ''], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout',
'Ground']]]
- library: stdcell130
- name: AND2X2
- pins: [['A', 'Input', ''], ['B', 'Input', ''], ['Y', 'Output', ''],
['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: ['Input', '']
    - direction: Input
    - name: A
    - signal:
  - B: ['Input', '']
    - direction: Input
    - name: B
    - signal:
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: ['Output', '']
    - direction: Output
    - name: Y
    - signal:

You can use the nested names shown in the dump to access individual
bits of the parsed results:

for cell in x:
    print cell.name
    print cell.pins.keys()
    print cell.pins.VDD.signal
    print cell.pins.A.direction
    print

prints:

AND2X1
['A', 'Y', 'B', 'VDD', 'VSS']
Power
Input

AND2X2
['A', 'Y', 'B', 'VDD', 'VSS']
Power
Input

-- Paul


From ian.g.kelly at gmail.com  Tue May 13 20:18:01 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 13 May 2008 18:18:01 -0600
Subject: list.__len__() or len(list)
In-Reply-To: <g0d9sj$m58$1@registered.motzarella.org>
References: <g0d9sj$m58$1@registered.motzarella.org>
Message-ID: <3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>

On Tue, May 13, 2008 at 5:57 PM, Nikhil <mnikhil at gmail.com> wrote:
>  __len__() is a built-in function of the list object and is updated along
> with the list object elements and will be useful incase the list is very
> huge.
>
>  len() is an external method again, which may require the processing cycles
> again.

The purpose of obj.__len__() is to implement len(obj), which simply
calls it.  So obj.__len__() may be faster, but only marginally.  The
reason to prefer len(obj) is that if you inadvertently pass an object
that does not implement __len__, you get the more appropriate
TypeError rather than an AttributeError.


From gagsl-py2 at yahoo.com.ar  Mon May 12 17:21:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 18:21:15 -0300
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
Message-ID: <op.ua179pnbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 08:09:45 -0300, Gruik <benjamin.fremiot at gmail.com> escribi?:

> On May 12, 12:31?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.frem... at gmail.com> escribi?:
>>
>> > I'm currently working on python embedding with C++. My goal is that
>> > the C++ part handle files writing/reading so that the Python part only
>> > works with buffers.
>>
>> > I succeeded in buffer exchanges. The problem is that some of the files
>> > I read/write are python files so that, before embedding, I imported
>> > them as modules when I needed them.
>>
>> > But now that the Python part only receive buffers, I can't do it
>> > anymore. So I wonder :
>> > - is it possible to import module from a buffer instead of files?
>> > - or is it possible to create a module object from my buffer?
>>
>> Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c
>>
>
> Thanks for your quick answer !
> I think I'll have no problem with that in C++ and I'm going to try it
> right after this message.
>
> But before that 1 question: what if I'm in Python ?
> Following your solution, I did that in Python :
>
>     def load_buffer(buffer) :
>         compiled_buffer = compile(buffer, "module_name", "exec")
>         exec(compiled_buffer)
>
> It works great except that I can't have a module object and that it is
> as if I did "from module import *"
> But I need the module object and not an "import *" behavior.
> Any idea about the way to do that?

Almost - you have to create a new module and exec the code into its namespace:

py> import new
py> foo = new.module("foo", "This is the foo module")
py> exec "def f(): pass" in foo.__dict__
py> foo
<module 'foo' (built-in)>
py> foo.f
<function f at 0x00A3E230>
py> dir(foo)
['__builtins__', '__doc__', '__name__', 'f']

(replace "def f(): pass" with the compiled buffer)

Two differences with a "normal" module:

- it has no __file__ attribute - you may want to add it, with the original filename, or leave it off to show that it's not loaded from a file.
- it does not exist in sys.modules, so other modules cannot import it. If you want to allow that: sys.modules['foo'] = foo (perhaps one should check previously that there is no module named "foo" before replacing it...)

-- 
Gabriel Genellina



From tjreedy at udel.edu  Mon May  5 15:00:43 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 5 May 2008 15:00:43 -0400
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com><b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <fvnlgp$hjj$1@ger.gmane.org>


"globalrev" <skanemupp at yahoo.se> wrote in message 
news:9c619edb-303b-439b-ad65-995fb76f70d5 at y38g2000hsy.googlegroups.com...
| sorry i noticed now a little error, i was playing around a lot and saw
| that on the sel-example i had then called foo.hello() instead of
| foo.Hello().

Lesson: whenever one inquires about an 'error', one should cut and paste 
the error traceback along with a relevant snippet of code. 





From dullrich at sprynet.com  Fri May 23 11:01:49 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 23 May 2008 10:01:49 -0500
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
Message-ID: <ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>

On Fri, 23 May 2008 09:13:50 -0400, "John Salerno"
<johnjsal at NOSPAMgmail.com> wrote:

>"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
>message news:4836747b$0$15488$426a74cc at news.free.fr...
>> Ever heard of the "Model/View/Controller" pattern ?
>
>Yes, I have, but I probably don't understand it well enough yet. For 
>example, I don't  really know what is meant by phrases like "build a model", 
>"the view registers itself with the model", "interations are sent to the 
>appropriate controller" -- I may understand them literally, but I get the 
>feeling that the implementation of these ideas are beyond me. 

I doubt that.

I've done things like this. I ended up with just a Model and a View,
no Controller. I assumed that meant I was being Bad - I read once
that that often happens, specifically with GUI programs.

An example, certainly not meant to be definitive, maybe not
even right, probably not "right", but illustrating explicitly
what those terms you claim not to understand might mean
in an implementation:

class Model:
  """Encapsulates an abstract version of the game:
Knows nothing about how the players make moves,
the moves are reported to the model via the 
ProcessMove method. Knows nothing about how the
state of the game is displayed to the players;
that's handled by the view or views. The model
might contain a matrix, where the entry in each
cell is None or a certain Piece object. The model
knows that if a certain Cell contains a King then
it's legal to move that King to this Cell but
not to that Cell - that's part of the rules of the
game, something the View knows nothing about"""

  def __init__(self):
    #set up internal state, for example
    #self.board = [[None]*8]*8
    #and then self.board[0,4] = Queen[WhitePlayer],
    #etc. Whatever...

    self.views = []

    #or just self.view = None if there's
    #no reason for multiple views. When I did
    #something like this once I decided at the
    #end that I should have allowed multiple
    #views even though there was only one to start,
    #because functionality that got added to the view
    #could have been done more cleanly by creating
    #a second view (one view being the display and
    #another being spoken messages)

  def RegisterView(self, view):
    self.views.append(view)
    #or just self.view = view

  def UpdateViews(self):
    for view in self.views:
      view.UpdateDisplay(self)

  #or UpdateView(self): if self.view: self.view.UpdateDisplay(self)

  def ProcessMove(self, move):
    """Model recieves "messages" from View here."""
    #modify internal state depending on the
    #information passed in "move",
    #for example move might say that the Piece in
    #a certain Cell was dragged to another Cell.
    #Here in ProcessMove you decide whether that's
    #a legal move, and if so what effect it should
    #have on the state of the game. Update state, then

    self.UpdateViews()

  #or there could be more than one "Process" method
  #if there are various different sorts of things the
  #players might do

class Square:
  def __init__(self, row, col):
    self.row = row
    self.col = col

#say a move is a drag from one square to another:

class Move:
  def __init__(self, start, end)
    self.start = start
    self.end = end

#wrote that out explicitly just to emphasize that
#the Move object, which the View passes to the
#Model as a message, doesn't know anything
#about the details of the display and also doesn't
#know anything about the rules of the game...

class View:

  def __init__(self, game):
    #set up the wxPython stuff
    self.game = game
    self.game.RegisterView(self)
    Bind(self, VariousEvents, VariousHandlers)

  def VariousHandlers(self, evt)
    #figure out what the players just did based
    #on evt. Maybe a player has just dragged a piece
    #from one square to another. figure out the row
    #and col of the start and end squares from 
    #information in evt.

    #Now tell the Model what just happened:

    self.game.ProcessMove(Move(Square(row1, col1),Square(row2, col2)))

  def UpdateDisplay(self):
    #look at self.game to figure out what pieces
    #go where, then draw them on the screen.
    wx.This
    wx.That

game = Model()
view = View(game)

>I think it's 
>mainly an issue of terminology, so probably I should just read up on MVC.
>
>> The user interface doesn't need to be graphical. There were games and 
>> emails clients and text editors before GUIs existed, you know ?
>
>Of course, but I'm specifically asking about creating a program that has a 
>GUI, and even more specifically it would be wxPython. 
>

David C. Ullrich


From vlastimil.brom at gmail.com  Sat May  3 17:31:38 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Sat, 3 May 2008 23:31:38 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
Message-ID: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>

Hi all,
I'd like to ask about some (probably elementary) things about the proper
usage of sqlite3 in python (2.5.2; win).
- Are there any peculiarities with using curs.executemany(...) vs. multiple
curs.execute(...) ? I read a notice, sqlite3 does internally some
caching, hence both should be similarly fast, but in my case executemany(...)
is quite a bit faster (probably due to the function call overhead?). Are
there maybe some caveats with using  executemany? (the obvious
memory consumption for the intermediate list doesn't seem to matter
much in my application).
Further, I am not quite sure about the standard usage of the cursor
object and also the proper commiting the transactions and closing the
connection.
Should one create a cursor of a connection and call the execute ... methods
of the cursor -
or is it better to call the shortcut execute etc. methods of the
Connection object
directly (as suggested in the docs:
http://docs.python.org/lib/node351.html(or are there specific use
cases for both approaches)?

When the transactions should be
commited? (creating, altering a table, or also selecting the results ?)
There seem to be some implicit handling of the transactions (
http://docs.python.org/lib/sqlite3-Controlling-Transactions.html#sqlite3-Controlling-Transactions);
hence I am not
sure about the standard usage of these methods; the same is true of
connection.close() - or are these calls eventually unnecessary?


To give a bit more info about my use case, my (gui) app displays a set texts
along with some informations on the currently visible text segments.
After starting a gui the texts are read from the source files (also
containing a kind of tags) - simultaneously
the tags are parsed and the corresponding values are stored in sqlite
"in memory" - the column names as well as the corresponding values for given
text parts are extracted dynamically from the source files.
During the whole run of the program the db should be available in order to
retrieve the properties of the given text index.

Below is a part of my code dealing with the populating of the db;, I'm
sorry, it's a not runable pseudocode, however, my present code works
somehow, but I'm quite sure, the implementation isn't really standard, hence
I'd like to hear some comments/suggestions. (I asked some time ago about the
possibility of a parametrised input of the table and column names, but this
seems impossible - therefore I used the string interpolation.)

- the variables are defined in other parts of code before; most of
the names might be self explanatory; self - custom class managing the text
with its properties; text_name - name of the table; index_col_name - a name
of the special db column containing the text index; act_db_columns - list of
the db columns; question_marks - a string "?, ?, ? ..." (synchronized with
the length of act_db_columns); tags_seq - a nested list with
the previously retrieved data for the database.

conn_tags_DB = sqlite3.connect(':memory:')
curs = self.conn_tags_DB.cursor()
curs.execute('CREATE TABLE IF NOT EXISTS "%s" ("%s", UNIQUE("%s"))' %
(self.text_name, index_col_name, index_col_name))
curs.execute(u'INSERT OR REPLACE INTO "%s"("%s") VALUES (?)' %
(self.text_name, index_col_name), (0,))
for new_col in act_db_columns[1:]: # adds the needed columns (except of the
first one: index_col_name)
    curs.execute('ALTER TABLE "%s" ADD "%s" TEXT' % (self.text_name,
new_col))
curs.executemany('INSERT OR REPLACE INTO "%s" VALUES (%s)' %
(self.text_name, question_marks), tags_seq)
self.conn_tags_DB.commit()

Are there maybe any comments or hints on a more elegant/efficient solution?

Now, what's
the usual way to access the database? Is it possible/wise/standard ...
to leave the connection open for the subsequent queries
during the whole run of the app; could even the
cursor eventually be present as a class method, or should it rather be
created repeatedly with each call?  (After populating, the db shouldn't be
modified, but only read.)

Many thanks in advance for your help;
 and apologies for this longer post.
   Greetings,
       Vlasta
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From dfnsonfsduifb at gmx.de  Sun May 25 16:04:42 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sun, 25 May 2008 22:04:42 +0200
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <qbtog5x7p9.ln2@joeserver.homelan.net>

notnorwegian at yahoo.se schrieb:

> ok where does the 1 in the come from?

Conversion to floating point values, which have no precise 
representation for all numbers that have such in the decimal system. 
Read more on http://en.wikipedia.org/wiki/IEEE_754-1985

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From pavlovevidence at gmail.com  Tue May 13 19:52:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 16:52:39 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<fcabf79a-8856-4e9d-89e9-a9b7345fa8ff@59g2000hsb.googlegroups.com>
Message-ID: <1cd579a7-c5a3-49f2-9071-0eef5e966dab@r66g2000hsg.googlegroups.com>

On May 13, 7:46 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 13, 6:09 pm, Eric Anderson <e... at pixelwareinc.com> wrote:
>
> > I mainly work in other languages (mostly Ruby lately) but my text
> > editor (Scribes) is python. With python being everywhere for dynamic
> > scripting I thought I would read the source to learn the language
> > better (I've gone through some basic tutorials but I always prefer to
> > learn from real source).
>
> There is one significant drawback of that....
>
> > So right from the start I see the following:
>
> > from operator import truth
> > if truth(argv):
> >   # blah blah blah
>
> > It is obvious they are testing to see if any command line arguments.
> > But curious for why the function is needed.
>
> It isn't.  The above is terrible code.
>
> 1. You don't even need operator.truth; the built-in bool performs that
> job.  However, this code could have been written before the advent of
> bool, so we'll give it a temporary pass.
> 2. bool in unnecessary in this context.
> 3. Lest someone claim that truth serves to document that you are
> asking for the boolean value of argv (i.e., whether it's not empty),
> it's redundnant since the if statement implies that.

4. sys.argv is never false.  I presume that that the first item of
argv was removed, or argv is a copy of sys.argv without the first
element.  Either way is bad style IMO.  Leave sys.argv alone, and if
you copy it without the first element, copy it to a differently-named
variable.



Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 05:28:13 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 11:28:13 +0200
Subject: Storing objects in relational database
In-Reply-To: <87r6bsvxz7.fsf@gmail.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
	<87r6bsvxz7.fsf@gmail.com>
Message-ID: <483a82ad$0$12589$426a74cc@news.free.fr>

Ville M. Vainio a ?crit :
> "bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:
> 
> 
>> I don't know if you'd label it 'elegant', but as far as I'm
>> concerned, storing serialized objects as blobs in a relational
>> database is mostly non-sense. If I use a relational database, it's
>> because it is a *relational* database. If you want an OODB, then we
>> have the ZODB, Durus and a couple others.
> 
> ... not to forget object-relational mappers like SQLAlchemy, SQLObject...

Which are more IMHO another way to "bridge" RBDMS with the programming 
language than a way to persist objects.


From jcd at sdf.lonestar.org  Wed May 14 06:53:02 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 14 May 2008 06:53:02 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
Message-ID: <1210762382.6465.3.camel@jcd-desktop>

On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
> > You sound like a commercial.
> 
> Get Flaming Thunder for only $19.95!  It slices, it dices!
> 
> > And while programs and libraries written in assembly may be twice as fast
> > as programs and libraries written in C, ...
> 
> It's a myth that they're only twice as fast.  An experienced assembly
> language programmer can usually get out at least a factor of 5 by
> using tricks such as cache-coherence, carry flag tricks, stack
> manipulations, etc.
> 
> > ... they're real hell to maintain.
> 
> That's also a myth.  For example, if C is easy to maintain, why is
> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> the world?  There should be lots of single-asset 8-by-8 shotgun cross
> compilers written in C, if C is easier to maintain.

Not only is it the world's only "single-asset 8-by-8 shotgun cross
compiler," but according to google, it's also the world's only "shotgun
cross compiler" period.  But I guess if you make up your own terminology
you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
single-asset 8x8 shotgun cross compiler, and what makes that of any
value to me?

Cheers,
Cliff




From iman.darabi at gmail.com  Mon May 12 06:37:03 2008
From: iman.darabi at gmail.com (Iman)
Date: Mon, 12 May 2008 03:37:03 -0700 (PDT)
Subject: artificiall, agent, movement
Message-ID: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>

hi
i'm working on some simulation project . i'm going to simulate traffic
of a city.
this simulation has cars , passengers , non-movable objects and
Traffic signals  .
i've made cars as intelligent agent . it has thinking method ,
changing states agents ...
the main problem is i have problem to move my agents in world .
it would be possible to add some method to agent which move  agent in
random  destination .
but i'm trying to find some patterns which is designed  for this
problems .
is there any sample source code in python or links, docs to help me ?
 thanks for your attention .


From wizzardx at gmail.com  Wed May  7 03:04:57 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:04:57 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
Message-ID: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>

Hi Vlasta.

>
> tags_lookups[tag][item_dict[tag]] = tags_lookups[tag].get(item_dict[tag],
> set()) | set([idx])
>
> I thought, whether I am not overestimating myself with respect to the future
> maintaining of the code ... :-)

Here's a suggestion for readability and maintainability:

Make a search() method (possibly on the object storing the text),
which takes variable args.

You'd declare it something like this:

def search(self, **kwargs)

And call it like this:

text.search(line=123, VCC=1, etc)

Probably it would return a list of results (line numbers in the original text?).

Then inside the function build up the sets etc, and comment the logic
liberally so you can understand it later.

This approach should be much more readable the equivalent sqllite + SQL.

>
>  The suggested XML structure is actually almost the one, I use to prepare
> and control the input data before converting it to the one presented in the
> previous mail :-). The main problem is, that I can't seem to make it fully
> valid XML without deforming the structure of the text itself - it can't be
> easily decided,  what CUSTOM_TAG should be in some places - due to the
> overlapping etc.

I was originally going to suggest an overlapped tag format, similar to this:

<b>Bold text<i>Bold and italicised</b>Italicised</i>

But I changed my mind. It's seriously malformed :-) I think that for
now, your format, where your marker values remain 'active' until
changed to another value is the best way way to go. XML's problems
with this sort of thing are a know limitation.

See this link:

http://en.wikipedia.org/wiki/XML#Disadvantages_of_XML

"Expressing overlapping (non-hierarchical) node relationships requires
extra effort"

There is some research into the subject, but no major (ie widely-used)
Python libraries as far as I can tell.

Google for "overlapping markup" and "python overlapping markup" for
more information. Here's one interesting page I found:

http://www.wilmott.ca/python/xmlparser.html#OVERLAPPED

It discusses the issue in detail, and comes with a Python
implementation (I haven't checked it).

David.


From jcd at sdf.lonestar.org  Fri May 23 10:04:52 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 23 May 2008 10:04:52 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
	<5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>
Message-ID: <1211551492.3332.8.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-22 at 15:06 -0400, Dan Upton wrote:
> Who wants to verify that that's correct to that many digits? ;)

Verified.

I checked it against the million digits on piday.org, by putting each
into a string, stripping out spaces and newlines, and doing:

>>> piday[:len(clpy)] == clpy
False
>>> piday[:len(clpy)-1] == clpy[:-1]
True
>>> print piday[len(clpy)-10:len(clpy)+1]
44893330963
>>> print clpy[-10:]
4489333097
>>> 

So the last digit doesn't match, even accounting for rounding, but
that's probably because it was calculated to the bit, not to the digit.




From goldnery at gmail.com  Sat May 10 13:20:00 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 10:20:00 -0700 (PDT)
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
	<4825afc8$0$14350$e4fe514c@news.xs4all.nl>
Message-ID: <8825cf75-8b21-4bca-bba2-97b817b11ebe@a23g2000hsc.googlegroups.com>

Thanks guys I think you miss understood me. i have been mining to use
python to create a none web application.
And i found out that i can ran python scripts by calling them from CMD
or just raning them from windows


From deets at nospam.web.de  Sun May 18 10:53:41 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 16:53:41 +0200
Subject: writing python extensions in assembly
In-Reply-To: <mailman.1237.1210962526.12834.python-list@python.org>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>	<mailman.1229.1210949533.12834.python-list@python.org>	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>	<mailman.1232.1210952591.12834.python-list@python.org>	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>	<mailman.1236.1210959884.12834.python-list@python.org>	<a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
	<mailman.1237.1210962526.12834.python-list@python.org>
Message-ID: <69au85F31e943U1@mid.uni-berlin.de>

> Also, from the gcc manpage, apparently 387 is the default when
> compiling for 32 bit architectures, and using sse instructions is
> default on x86-64 architectures, but you can use -march=(some
> architecture with simd instructions), -msse, -msse2, -msse3, or
> -mfpmath=(one of 387, sse, or sse,387) to get the compiler to use
> them.
> 
> As long as we're talking about compilers and such... anybody want to
> chip in how this works in Python bytecode or what the bytecode
> interpreter does?  Okay, wait, before anybody says that's
> implementation-dependent: does anybody want to chip in what the
> CPython implementation does?  (or any other implementation they're
> familiar with, I guess)

There isn't anything in (C)Python aware of these architecture extensions 
- unless 3rd-party-libs utilize it. The bytecode-interpreter is machine 
and os-independent. So it's above that level anyway. And AFAIK all 
mathematical functionality is the one exposed by the OS math-libs.

Having said that, there are of course libs like NumPy that do take 
advantage of these architectures, through the use of e.g. lib atlas.

Diez


From arnodel at googlemail.com  Fri May  9 02:02:47 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 07:02:47 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
Message-ID: <m2ve1o3th4.fsf@googlemail.com>

"Kam-Hung Soh" <kamhung.soh at gmail.com> writes:

> I avoid creating a temporary variable if it's only used once
> immediately,  so I would have written:
>
> newtlist = ''.join(sorted(list(line)))

Or ''.join(sorted(line))

as sorted() works with any iterable.

-- 
Arnaud


From protected at myshelter.net  Sun May  4 05:39:59 2008
From: protected at myshelter.net (Protected)
Date: Sun, 4 May 2008 10:39:59 +0100
Subject: Please help - Tkinter not doing anything
In-Reply-To: <237aa3894dff4c8976896df85f4d7d23@localhost>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
Message-ID: <3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>

Good thinking. It was indented with spaces, so I replaced them with tabs.
Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
code in two parts (with the second one beginning in that line) and run them
separately, I get no errors, but still nothing happens.

class Application(Frame):
    def say_hi(self):
        print "hi there, everyone!"

    def createWidgets(self):
        self.QUIT = Button(self)
        self.QUIT["text"] = "QUIT"
        self.QUIT["fg"]   = "red"
        self.QUIT["command"] =  self.quit

        self.QUIT.pack({"side": "left"})

        self.hi_there = Button(self)
        self.hi_there["text"] = "Hello",
        self.hi_there["command"] = self.say_hi

        self.hi_there.pack({"side": "left"})

    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()

var root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()

On Sun, May 4, 2008 at 12:33 PM, Q4 <q4 at invalid.com> wrote:

> On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshelter at gmail.com>
> wrote:
> > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > some Tkinter examples, including the one from the library reference,
> > but they don't seem to do anything! Shouldn't there be, like, a
> > dialog?
> >
> > I'm running Windows XP and using IDLE. You can assume my version of
> > Python is the latest.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> If you just copy the code from the python doc the indentation might be
> broken.
> Send the code and I'll take a look at it.
>
> Do you get any errors?
>
> --
> My website:
>  http://www.riddergarn.dk/koder/
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
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From gagsl-py2 at yahoo.com.ar  Thu May 15 05:48:25 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 06:48:25 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
Message-ID: <op.ua6v6zkcx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:

> Having a hard time phrasing this in the form
> of a question...
>
> The other day I saw a thread where someone asked
> about overrideable properties and nobody offered
> the advice that properties are Bad. So maybe we've
> got over that. I suppose properties could have
> Bad consequences if a user doesn't know they exist
> and think that a certain property of an object is
> just an ordinary attribute. But that applies to
> almost any aspect of any language.
>
> If a person comes from, say, Object Pascal (Delphi)
> then properties are hard to live without. The
> other day I decided I wanted what OP calls an
> "indexed property" or "array property". Couldn't
> figure out how to make a _property_ behave that way.
> So I read a little bit about descriptors, and a
> few minutes later I had an indexedproperty thing
> that works just like property, except it gives
> an indexed property! This is just too cool.
>
> Why? For example, a Matrix should have a row[n]
> property allowing things like
>
> m.row[0] = m.row[1] + m.row[2]
>
> Ok, you could do _that_ by just making row
> an ordinary list of Row objects. But then
> you'd have to say
>
> m.row[0] = Row([1,2,3])
>
> where I want to be able to say
>
> m.row[0] = [1,2,3]
>
> and have the Row created automatically.
>
> _Also_ with these indexed properties my Matrix
> can have m.row[j] and m.col[k] that look exactly
> the same to a client - we don't want to store a
> list of rows internally and also store the same
> data in a list of columns. Too cool.
>
> Hmm, none of that's a valid excuse for a post here.
> Um, right, here we go: Anyone see problems or
> possible improvements with the implementation
> of indexedproperty below?
>
> """indexed.py: "indexedproperty" works more or less
> like "property" except it gives what in Object Pascal
> would be an "indexed property". See the
> __name__="__main__" section below for a demo
>
> """
>
> class WriteOnlyIP(Exception):
>   def __str__(self):
>     return """
>
> indexed property is write-only
>
> """
>
> class ReadOnlyIP(Exception):
>   def __str__(self):
>     return """
>
> indexed property is read-only
>
> """
>
> class indexedproperty(object):
>   def __init__(self, getitem=None, setitem=None):
>     self.getitem = getitem
>     self.setitem = setitem
>
>   def __get__(self, obj, owner):
>     self.obj = obj
>     return self
>
>   def __getitem__(self, index):
>     if self.getitem:
>       return self.getitem(self.obj, index)
>     else:
>       raise WriteOnlyIP
>
>   def __setitem__(self, index, value):
>     if self.setitem:
>       self.setitem(self.obj, index, value)
>     else:
>       raise ReadOnlyIP
>
>
> if __name__ == "__main__":
>
>   class AClass(object):
>     def __init__(self):
>       self.cells = [[0,0], [0,0]]
>
>     def SetCell(self, (row, col), value):
>       self.cells[row][col] = value
>
>     def GetCell(self, (row, col)):
>       return self.cells[row][col]
>
>     cell = indexedproperty(GetCell, SetCell)
>
>   C = AClass()
>   for row in range(2):
>     for col in range(2):
>       C.cell[row, col] = "row: %s, col: %s" % (row, col)
>
>   for row in range(2):
>     for col in range(2):
>       print C.cell[row, col]
>
>   C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]
>
>   print "After  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]:"
>
>   for row in range(2):
>     for col in range(2):
>       print C.cell[row, col]
>



-- 
Gabriel Genellina



From wuwei23 at gmail.com  Tue May 13 22:55:50 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 19:55:50 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
Message-ID: <e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>

On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> "George Sakkis" <george.sak... at gmail.com> wrote in message
> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > you can safely ignore its posts.
>
> How does it generate text?

My guess is by inhaling a lot of intoxicants.


From mail at timgolden.me.uk  Thu May 29 08:00:59 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 13:00:59 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483E9AFB.2040402@timgolden.me.uk>

<<< No Message Collected >>>


From fiacre.patrick at gmail.com  Fri May 23 01:46:16 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:46:16 -0400
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <48365a28$0$11628$607ed4bc@cv.net>

George Maggessy wrote:
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?
> 
> Cheers,
> George


Look at Pylons.


From wizzardx at gmail.com  Tue May  6 11:04:34 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 17:04:34 +0200
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
	<18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
Message-ID: <18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>

>
>  I'll check a few of those results and post to the list if I find something good.
>

It looks like Heapy, part of the Guppy project can do this:

http://guppy-pe.sourceforge.net/#Heapy

David.






David.


From duncan.booth at invalid.invalid  Wed May 14 10:55:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 May 2008 14:55:45 GMT
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <Xns9A9EA1FF16358duncanbooth@127.0.0.1>

hdante <hdante at gmail.com> wrote:

>  How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server). Do you recommend doing so ?

Yes, even those ISP's who do have a news server often seem to make a mess 
of maintaining it. I use news.individual.net which seems to do a pretty 
good job of filtering out spam messages (or at least I see a lot more 
messages complaining about spam messages than spam messages themselves).

Also, it is a lot cheaper than most third party news servers: 10EUR per 
year for 25,000 newsgroups. See http://news.individual.net/

>  What's your prefered news reader ?

XNews, but that's mostly just because I'm used to it. It is getting a bit 
elderly these days and doesn't handle non-ascii encodings very well. It 
does have good scorefile support though.

I use Hamster to actually retrieve news: Hamster runs as a local newsserver 
and pulls feeds from as many different news servers as I want to configure 
presenting them all as though they come from the same server. That means I 
can use my ISPs server as a backup in case I can't access 
news.individual.net for any reason (my previous ISP kept 'accidentally' 
throttling usenet access): Hamster just merges the newsfeeds together and 
is intelligent enough not to fetch a message twice from different servers.

I also recommend Gmane which provides a free news server for most mailing 
lists: mailing lists are a lot more manageable when gatewayed into a news 
server. If you just want to access comp.lang.python I think you'll find the 
mailing list to which it is connected is available for free on Gmane.


From wuwei23 at gmail.com  Wed May 21 22:48:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:48:01 -0700 (PDT)
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
Message-ID: <8242bac2-7bbe-472a-8079-cf249e02e4e8@s21g2000prm.googlegroups.com>

On May 21, 11:31 pm, TheSaint <fc14301... at icqmail.com> wrote:
> Other idea, I'll apreciate somebody to join and put new views on this
> project.

Have you thought about putting the full project somewhere like
http://code.google.com/ ?

Nothing gets comments & criticisms like used code :)



From theller at python.net  Wed May 21 12:33:35 2008
From: theller at python.net (Thomas Heller)
Date: Wed, 21 May 2008 18:33:35 +0200
Subject: [ctypes] convert pointer to string?
In-Reply-To: <mailman.1427.1211384826.12834.python-list@python.org>
References: <mailman.1427.1211384826.12834.python-list@python.org>
Message-ID: <69j16pF33ht4vU1@mid.individual.net>

Neal Becker schrieb:
> In an earlier post, I was interested in passing a pointer to a structure to
> fcntl.ioctl.
> 
> This works:
> 
> c = create_string_buffer (...)
> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
> err = fcntl.ioctl(eos_fd, request, args)
> 
> Now to do the same with ctypes, I have one problem.
> 
> class eos_dl_args_t (Structure):
>     _fields_ = [("length", c_ulong),
>                 ("data", c_void_p)]
> ...
> args = eos_dl_args_t()
> args_p = cast(pointer(args), c_void_ptr).value
> fcntl.ioctl(fd, request, args_p)  <<< May fail here
> 
> That last may fail, because .value creates a long int, and ioctl needs a
> string.
> 
> How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
> 0-terminate string, because the structure may contain '0' values.
> 
ctypes instances support the buffer interface, and you can convert the buffer
contents into a string:

>>> from ctypes import *
>>> c_int(42)
c_long(42)
>>> buffer(c_int(42))
<read-only buffer for 0x00AE7260, size -1, offset 0 at 0x00B06040>
>>> buffer(c_int(42))[:]
'*\x00\x00\x00'
>>>

Thomas


From Lie.1296 at gmail.com  Fri May 30 04:31:03 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 30 May 2008 01:31:03 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>

On May 27, 12:28?pm, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian
> notation, but just for when it's appropriate.

If it was me, I'd use an empty-defined class:

class Fake(object):
    pass

data = 'headinfo=trash;headtrash=info'
Header = Fake()
Header.Str = data
Header.Dict = parse(data)

it saves name if it's important (alternatively, you may also use a
dict or a tuple/list to store the string/dict pair).
But using Fake class just like that is difficult to work with if I
need to "write" to the data (not read only) and synchronizes the data,
in that case, it's easy to extend the Fake Class:

class Fake(object):
    def __init__(self, data):
        self.data = parse(data)

    def toStr(self):
        return str(self.data)
    def fromStr(self, s):
        self.data = parse(s)
    Str = property(toStr, fromStr)

    def toDict(self):
        return self.data
    def fromDict(self, s):
        self.data = s
    Dict = property(toDict, fromDict)

you might go as far as overriding __str__ and __repr__ as appropriate.


From takaurai at gmail.com  Thu May 29 03:26:45 2008
From: takaurai at gmail.com (=?ISO-2022-JP?B?GyRCJD8kKxsoQg==?=)
Date: Thu, 29 May 2008 00:26:45 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
Message-ID: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>

Hi everyone,

 I am developing the console which has the embedded Python interactive
interpreter. So, I want to judge whether current command is complete
or not. Below is good example to solve this problem.

//
// http://effbot.org/pyfaq/how-do-i-tell-incomplete-input-from-invalid-input.htm
//
int testcomplete(char *code)
  /* code should end in \n */
  /* return -1 for error, 0 for incomplete, 1 for complete */
{
  node *n;
  perrdetail e;

  n = PyParser_ParseString(code, &_PyParser_Grammar,
                           Py_file_input, &e);
  if (n == NULL) {
    if (e.error == E_EOF)
      return 0;
    return -1;
  }

  PyNode_Free(n);
  return 1;
}

 But, I think this code has a problem. For example, when argument
'code' has below python command,

if x % 2:
   print "odd"

at the current situation, this function returns COMPLETE!
But, I think that sometimes users want to type "else" statement. So, I
expected to get INCOMPLETE from this function, but I didn't.

How should I do it?


Thanks,
urai


From Lie.1296 at gmail.com  Sun May 25 14:09:28 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 11:09:28 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <a143085e-2ab4-460d-8264-51eea447a59b@l28g2000prd.googlegroups.com>

On May 22, 3:10?am, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

My advice? Mix a bit of both. PHP's pros is it's tight integration
with HTML, it's really easy to slip small, short PHP snippets here and
there. Server side includes for example, is a short one-liner, in
python it would involve reading the original file, finding where and
what to slip, then reading the include file then concatenates the
files then send it to the requester, or you could setup an engine for
you which might take some time and patience.

On the other hand, python is a general-purpose language, and is a
better designed language. Writing the blog back-end in Python is
probably easier than in PHP while writing the interface-related codes
is probably easier in PHP. You might also consider calling python code
from the PHP.


From semanticist at gmail.com  Wed May  7 21:13:27 2008
From: semanticist at gmail.com (Miles)
Date: Wed, 7 May 2008 21:13:27 -0400
Subject: slicing lists
In-Reply-To: <fvtf0p$6pj$1@news.mtu.ru>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
Message-ID: <a49e45f50805071813s3a1f9a14vfde71b87aa07a741@mail.gmail.com>

On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
 <ivan.illarionov at gmail.com> wrote:
 > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
 >
 >  > Is there a way to do:
 >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 >  > x[0,2:6]
 >  >
 >  > That would return:
 >  > [0, 3, 4, 5, 6]
 >
 >  IMHO this notation is confusing.
 >
 >  What's wrong with:
 >  [0]+x[2:6]

 I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:

 my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
 return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)

 This isn't incredibly efficient, but it does what you want (I think):

 from itertools import chain

 class multisliceable(list):
  def __getitem__(self, slices):
    if isinstance(slices, (slice, int, long)):
      return list.__getitem__(self, slices)
    else:
      return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
                          else [list.__getitem__(self, s)] for s in slices]))

 p = open('/etc/passwd')
 q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]

 -Miles


From deets at nospam.web.de  Wed May 21 09:39:10 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 15:39:10 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
Message-ID: <69in0tF33sdj6U2@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

> On May 21, 3:12 pm, "boblat... at googlemail.com"
> <boblat... at googlemail.com> wrote:
>> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>>
>> > Although that solution is pretty, it is not the canonical solution
>> > because it doesn't cover the important case of "if" bodies needing to
>> > access common variables in the enclosing scope.  (This will be easier
>> > in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> > IMHO closer to a canonical solution to this FAQ.
>>
>> Hello everybody,
>>
>> thanks for the various answers. I'm actually pretty puzzled because I
>> expected to see some obvious solution that I just hadn't found before.
>> In general I find Python more elegant and syntactically richer than C
>> (that's where I come from), so I didn't expect the solutions to be a
>> lot more verbose and/or ugly (no offense) than the original idea which
>> would have worked if Python's assignment statement would double as
>> expression, as in C.
>>
>> Thanks again,
>> robert
>>
>> PS: Since I'm testing only three REs, and I only need the match
>> results from one of them, I just re-evaluate that one.
> 
> Is it really a lot to change to have it
> 
> if my_re1.match(line):
>   match = my_re1.match(line)
> elseif my_re2.match(line):
>   match = my_re2.match(line)
> elseif my_re3.match(line):
>   match = my_re3.match(line)
> 
> ?
> 
> That reads clearly to me...

And wastes time. regular expressions can become expensive to match - doing
it twice might be hurtful.

Diez


From roy at panix.com  Fri May  2 00:16:05 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 00:16:05 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <roy-8900EE.00160502052008@70-1-84-166.area1.spcsdns.net>

In article <87abj91j8u.fsf at benfinney.id.au>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> I've never clearly understood why people want to use "#! /usr/bin/env
> python", which is prone to finding a different Python from the one
> installed by the operating system. I'd be interested to see what
> responses are in favour of it, and what the reasoning is.
> 
> One possible reason is that the programmer is attempting to allow for
> systems where Python has been installed, but not from an operating
> system package.

You've got it exactly.

I'm currently using Python to write unit tests as part of a build system.  
Many of our development boxes don't have python installed in /usr/bin (or 
perhaps at all).  And even if they did, we might want to use a different 
version of Python on different branches of the code.

We've got Python built for all our platforms and the binaries stored in our 
source control system.  When you check out a particular branch, you get the 
right version of Python for that branch.  By having the Python scripts 
start with #!/usr/bin/env python, I can select the version of Python I want 
just by changing the environment.

Then, of course, I recently ran across a machine where env was installed in 
/opt/gnu/bin instead of /usr/bin.  Sigh.  Sometimes you just can't win.


From deets at nospam.web.de  Mon May 26 12:32:37 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 18:32:37 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
Message-ID: <6a0722F33j3q5U1@mid.uni-berlin.de>

nik600 wrote:

> Both win and linux if possible i don't have preference for gui. Thanks

Qt4 now contains the WebKit html widget.

Diez


From castironpi at gmail.com  Fri May 16 11:21:07 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:21:07 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com> 
	<9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com>
Message-ID: <f821aecb-68a7-4aab-9cbd-b7fd054364eb@y38g2000hsy.googlegroups.com>

On May 16, 9:41 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > > ?? wrote:
> > > > >     I wonder why below does not work.
>
> > > > > a = object()
> > > > > a.b = 1        # dynamic bind attribute failed...
>
> > > > The implementation of slots depends on that behaviour:
>
> > > >http://docs.python.org/ref/slots.html
>
> > > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > > Can you expand on that?
>
> > > > Peter
>
> > > Spirals are important.
>
> > I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> > - Show quoted text -
>
> Python 3.0a5 (py3k:62932M, May  9 2008
>  win32
> Type "help", "copyright", "credits" or>>> import parser
> >>> import compiler
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: No module named compiler
>
> Does anyone want to model mic-based soundwaves?  My recent project has
> been color progression over time, and talking about compilers.- Hide quoted text -
>
> - Show quoted text -

Can 'compiler' come back in?  I want to build a compiler + exec.


From zethex at hotmail.com  Thu May 22 00:59:47 2008
From: zethex at hotmail.com (Zethex)
Date: Wed, 21 May 2008 21:59:47 -0700 (PDT)
Subject: Bit of List replacing trouble (newbie)
Message-ID: <17397379.post@talk.nabble.com>


At the moment i'm doing a piece of work for school and I'm stuck at the
moment.

I have a list of words, for example:

Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']

I have another list which I need to use to replace certain words, and its in
the form of:

synonyms = [
                  [canine, [dog, puppy, bulldog]],
                  [ road, [street, avenue, court]]
                                                             ]
What the procedure must do is replace dog with canine, and street with road. 
Therefore if a word is in the sentence and appears on the right side of the
list entry, replace it with the left entry.

I can't seem to find a help file with what I'm after.  I'm just wondering if
anyone can help me on the right track on how to start this procedure, maybe
not an answer but just a little help on how to get started as I'm complete
stuck right now.  
-- 
View this message in context: http://www.nabble.com/Bit-of-List-replacing-trouble-%28newbie%29-tp17397379p17397379.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From maxm at mxm.dk  Mon May 26 04:11:22 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 10:11:22 +0200
Subject: php vs python
In-Reply-To: <Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
Message-ID: <g1drbb$4bk$1@ger.gmane.org>

Jerry Stuckle skrev:
> Ivan Illarionov wrote:

> I repeat.  The language has nothing to do with it.  Good programmers 
> write good code.  Lousy programmers write bad code.

That is simply not true!

The languag has a lot to do with what you can do in any given time.

You can write good code in a bad language. But it will take lot more 
time. And so it will not be done.

Your argument, if it was true, would mean that I could just as well 
write a blog in c or even assembler, and still write optimal code.


php is a terrible language and I cringe whenever I have to use it. In 
fact I have turned down many jobs because they were written in php. It 
is simply to frustrating.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From saluk64007 at gmail.com  Sun May  4 20:15:06 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 4 May 2008 17:15:06 -0700
Subject: Are rank noobs tolerated, here?
In-Reply-To: <m31w4hk4bo.fsf@googlemail.com>
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<m31w4hk4bo.fsf@googlemail.com>
Message-ID: <c3f69bf60805041715j79ab7240sb96a580d0e169339@mail.gmail.com>

There is also the python tutor list:

http://mail.python.org/mailman/listinfo/tutor

Which is more geared toward beginners.  Although I am subscribed to both
lists, and they are both matched by the same filter for me so I wont know
the difference...  But there may be people who are not subscribed to both
lists and don't care to listen to beginner discussions.  I wouldn't know.

There is python irc as well: #python on irc.freenode.net.  If you just have
a quick question you may be better off trying there first.
-------------- next part --------------
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From castironpi at gmail.com  Thu May 15 10:06:31 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:06:31 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
	<46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>
	<974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>
Message-ID: <74e109f2-724e-4271-8520-32e62163b843@j22g2000hsf.googlegroups.com>

On May 15, 9:02?am, max <maxwell.newla... at gmail.com> wrote:
> On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > > i currently have locations of the mp3s in question as strings, which
> > > > works for parsing local files, but gives me a "No such file or
> > > > directory" error when it tries to process URLs. ?it seems terribly
> > > > inefficient to download each mp3 just to get at that small tag data,
> > > > and i assume there's a way to do this with file() or open() or
> > > > something, i just can't get it to work.
>
> > > You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> > > with ID3 V1 tags you'll have to download the file anyway because those are
> > > in the last 128 bytes of an MP3 file.
>
> > > Ciao,
> > > ? ? ? ? Marc 'BlackJack' Rintsch
>
> > Just don't import time. ?What would you do with an autolocking timer,
> > such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> > of a lady.
>
> thanks guys. ?i guess i just figured there'd be a way to get at those
> id3 bytes at the end without downloading the whole file. ?if java can
> do this, seems like i should just stick with that implementation, no?- Hide quoted text -
>
> - Show quoted text -

I can post life1 to this: lifeOne, lifeone, lifea perhaps.


From weinhand at unileoben.ac.at  Wed May  7 02:03:48 2008
From: weinhand at unileoben.ac.at (Weinhandl Herbert)
Date: Wed, 07 May 2008 08:03:48 +0200
Subject: DISLIN 9.3 starting issues
In-Reply-To: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
Message-ID: <48214644$0$11610$3b214f66@aconews.univie.ac.at>

adolfo wrote:

> I built the following little program:
> 
> from numpy import *
> from dislin import *
> 
> def main():
>     x = arange (100, typecode=Float32)
>     plot (x, sin (x/5))
>     disfin ()
> 
> main()
> 
> *** Here are the problems:
> 
> 1. The "from Numeric import" statement did not work, I replaced with
> "from numpy import*" and no complains form the interpreter.
> 
> 2. If I enyter "from dislin import *" I get:
>  Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     from dislin import *
> ImportError: No module named dislin
> 
> I checked the environmental variables paths and it all seems Ok:
> c:\dislin
> SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
> \Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
> PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python

the environment variable is PYTHONPATH and i has to contain the directory
where the dislin.pyd module can be found;
you should set environment variable DISLIN too
(see python.inf, which you can find in the dislin-distribution)

depending on your python version (2.4 or 2.5) you need the correct 
dislin-distribution, because dislin is a fortran/c library with
a layer for python access.

and try some examples of the distribution (they are importing only dislin
and math modules).

hth

Herbert


From netizen at gmx.de  Mon May 26 06:30:45 2008
From: netizen at gmx.de (Michael Fesser)
Date: Mon, 26 May 2008 12:30:45 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
Message-ID: <et3l3414bkub2f4ra3b67i8ljkumu36lll@4ax.com>

.oO(Ivan Illarionov)

>On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>> Not at all.  I do it every day.
>> 
>> And BTW - yes, I write Python, also.  But I find I can write better,
>> faster code in PHP.
>
>I find I can write better code in Python. Maybe it's just a matter of 
>personal preference?

Exactly.

>> Do you write PHP?
>I did. And I hated it very much.

See, for me it's the other way round. I really hate Python syntax.
I only touch it for scripting Paint Shop Pro or if some third-party
Python script lacks proper documentation and I have to wade through
the sources to find the informations I need.

So where does this leave us? Nowhere. A language is just a tool and a
tool is just as good as the one who uses it. This was said often enough.

If you hate PHP, that's OK, but it doesn't make PHP a bad or even
inferior language.

Micha


From bj_666 at gmx.net  Mon May 19 02:22:08 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 06:22:08 GMT
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <69ckkgF31kls5U1@mid.uni-berlin.de>

On Sun, 18 May 2008 22:11:33 -0700, sapsi wrote:

> I am using HadoopStreaming using a BinaryInputStream. What this
> basically does is send a stream of bytes (  the java type is : private
> byte[] bytes) to my python program.
> 
> I have done a test like this,
> while 1:
> 	x=sys.stdin.read(100)
> 	if x:
> 		print x
> 	else:
> 		break
> 
> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
> 
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
> 
> However i get a 1 before all and a 4 just after \n and before the 6.
> 
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?

If there's extra data in `x` then it was sent to stdin.  Maybe there's
some extra information like string length, Java type information, or
checksums encoded in that data!?

Ciao,
	Marc 'BlackJack' Rintsch


From a.schmolck at gmail.com  Sun May  4 09:00:59 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Sun, 04 May 2008 14:00:59 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
Message-ID: <yfsod7mfcl0.fsf@gmail.com>

Gary Herron <gherron at islandtraining.com> writes:

> But... It's not!  
>
> A simple test shows that.   I've attached a tiny test program that shows this
> extremely clearly.  Please run it and watch it fail.

In [7]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

(I took the liberty to correct your test to actually do what I said, namely
use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
numpy.array(0)``).


'as

p.s. please don't send me copies to on-list replies, at least not without
explicitly mentioning the fact -- I've got better things to do then guessing
whether something was meant to be off-list or not.


From phil at riverbankcomputing.com  Sun May  4 11:04:04 2008
From: phil at riverbankcomputing.com (Phil Thompson)
Date: Sun, 4 May 2008 16:04:04 +0100
Subject: pyqt4: trouble making custom widget appear in mainwindow
In-Reply-To: <fcydnW0p4tOVK4DVnZ2dnUVZ8q7inZ2d@giganews.com>
References: <fcydnW0p4tOVK4DVnZ2dnUVZ8q7inZ2d@giganews.com>
Message-ID: <200805041604.04448.phil@riverbankcomputing.com>

On Sunday 04 May 2008, Lance Gamet wrote:
> Hi,
> about 3 years ago I did a bit of Qt3 and 4 on C++, now I am trying to do
> something in python.
>
> A QMainWindow subclass as my mainwindow. Its basically a frame with no
> widgets of its own.
>
> Several QWidget subclasses each representing a mode of the program, these
> widgets should appear in the mainwindow depending on what part of the
> program is being used.
>
> I have made the main window and a couple of widgets with designer-qt4 and
> generate a Ui_Whatever.py with pyuic4 and subclass that.
>
> My problem is I cant get my widgets to appear in the main window.
>
> My MainWindow.py looks like (imports etc skipped):
>
> class MainWindow(QMainWindow, Ui_MainWindow):
>     def __init___(self):
>         QMainWindow.__init__(self)
>         self.setupUi(self)
>
>     def newTeamWizardMode(self):
>         Widget = QWidget()
>         self.newTeamWizard = CreateNewTeamWizard(Widget)
>         self.newTeamWizard.setGeometry(QRect(0,0,90, 160))
>         self.newTeamWizard.setObjectName("newTeamWizard")
>         self.newTeamWizard.show()
>
> My CreateNewTeamWizard is defined like so:
>
> class CreateNewTeamWizard(QWidget, Ui_CreateNewTeamWizard):
>     def __init___(self, parent = None):
>         QWidget.__init__(self, parent)
>         self.setupUi(self)
>
> In my main program i make the main window and try and add the widget like
> this:
>
>     app = Qt.QApplication(sys.argv)
>     mainWindow = MainWindow()
>     app.connect(app, Qt.SIGNAL("lastWindowClosed()"), app, Qt.SLOT("quit
> ()"))
>     mainWindow.newTeamWizardMode()
>     mainWindow.show()
>
> One thing i tried was changing the CreateNewTeamWizard in
> MainWindow.newTeamWizardMode to CreateNewTeamWizard(Widget, self) to
> provide the main window as the parent but I get the following error:
>
>     self.newTeamWizard = CreateNewTeamWizard(Widget, self)
> TypeError: argument 2 of QWidget() has an invalid type
>
> I have looked for examples, but everything I have found is a bit too
> simple. Creating a single window or widget, displaying it as the programs
> main window and exiting when the window is closed.
>
> I havent found anything to tell me how to make a widget appear in a
> mainwindow how I want.
>
> Any tips?

I think QMainWindow.setCentralWidget() is what you are looking for.

> If someone can point me to a nice open source program that uses pyqt4
> that might help.

The eric4 IDE probably covers most things you'll ever need.

Phil


From upton at virginia.edu  Thu May 29 18:02:53 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 18:02:53 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <20080529175745.b3e7a579.darcy@druid.net>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<20080529175745.b3e7a579.darcy@druid.net>
Message-ID: <5504f9ac0805291502h2813e004k2e32bf820b190364@mail.gmail.com>

On Thu, May 29, 2008 at 5:57 PM, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?
>

Yeah, but if you look past the "FT is better than Python" propaganda,
there's some interesting discussion of language design.


From skanemupp at yahoo.se  Fri May 30 17:08:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 30 May 2008 14:08:35 -0700 (PDT)
Subject: SMS sending and receiving from website?
Message-ID: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>

can i send and receive messages from a website using python?

how would that work with costs? would the mobileowner pay both ways?


From george.sakkis at gmail.com  Tue May 20 23:36:07 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 20 May 2008 20:36:07 -0700 (PDT)
Subject: namespaces and eval
References: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>
	<m24p8y7yjf.fsf@googlemail.com>
Message-ID: <ebfbb557-62ca-462e-83a6-064563653834@p25g2000hsf.googlegroups.com>

On May 16, 5:02?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> dave.g1... at gmail.com writes:
> > Sorry for the repost, didnt' quite finish
>
> > Suppose I have a function in module X that calls eval e.g,
>
> > X.py
> > _______
> > Def foo(bar):
> > ? ? ? ? Eval(bar)
> > _______
>
> > Now eval will be called using the default eval(bar,globals(),locals())
> > and globals will pull in anything in module X.
>
> > Now I have module Y that calls bar like so
> > Y.py
> > ________
> > from x import *
> > def biz():
> > ? ? ? ? print "Im a silly example!"
> > Foo("biz()")
> > _______
>
> > Python will complain that it cannot find biz because it's not the X
> > module.
>
> > My question - is there any way to a) get a listing of active namespaes
> > search ALL active namespaces for a particular variable
>
> sys.modules gives you all the live modules.
>
> > b) get the namespace of the caller withing passing it in (here, Y)
>
> sys._getframe(1).f_globals (resp. sys._getframe(1).f_locals) gives you
> the caller's globals (resp. locals).
>
> > c) do anything else to get biz without passing
> > foo("biz()",locals(),globals()) or hacking biz into the __builtin__
> > namespace(don't know if it's even possible, but it defeats the
> > purpose of what I'm trying to do) ?
>
> Functions in Python are objects like any other, and can be passed as
> parameters. ?I.e:
>
> x.py
> ----------
> def foo(bar):
> ? ? bar()
>
>
>
>
>
> >>> from x import foo
> >>> def biz(): print "Boo!"
> >>> foo(biz)
> Boo!
>
> > I realize this is here for a reason, but I'm working on something
> > that's kind of a hack already
>
> > Thanks
> > dave
>
> > More gratuitous context. Long story I'm trying to write a hack for a
> > concise way of adding arbitrary methods to objects for JPA/JQuery like
> > chaning eg.
>
> > def foo(self):
> > ? ? print "foo"
> > ? ? return self;
>
> > wrap(x).foo().foo().foo().foo() etc....
>
> What about a composition function instead? I.e.
>
> compose(foo, foo, foo, foo)(x)
>
> Here's one that I made earlier:http://www.marooned.org.uk/~arno/python/compose.html

Neat, although the order is counter-intuitive; the callables should
better be called in the same order they are given in compose(). Here's
yet another take on the composition syntax:

DONE = object()

class Chainable(object):
    def __init__(self, val):
        self.val = val
    def __or__(self, func):
        if func is DONE:
            return self.val
        self.val = func(self.val)
        return self

# Test
def double(x): return 2*x
def square(x): return x**2
def succ(x): return x+1

>>> print Composable(2) | float | succ | square | double | DONE
18.0

Admittedly 'DONE' is ugly but it's necessary to denote that the piping
ends and the final value (rather than the Composable wrapper) should
be returned. The OP's wrap class suffers from the same problem but it
masks it by overriding __getattr__ in an old-style class. If the class
is changed to new-style, it becomes more obvious that
wrap(x).foo().foo().foo().foo() returns the wrap object, not x.

George


From mail at timgolden.me.uk  Wed May 14 11:29:32 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 14 May 2008 16:29:32 +0100
Subject: Rename field in Access DB
In-Reply-To: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
Message-ID: <482B055C.5050604@timgolden.me.uk>

Iain King wrote:
> I'm manipulating an MS Access db via ADODB with win32com.client.  I
> want to rename a field within a table, but I don't know how to.  I
> assume there is a line of SQL which will do it, but nothing I've tried
> (from searching) has worked.
> Basic code:
> 
> import win32com.client
> connection = win32com.client.Dispatch(r'ADODB.Connection')
> DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> connection.Open(DSN)
> connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> doesn't work
> connection.Close()

<code>
import os, sys
from win32com.client.gencache import EnsureDispatch as Dispatch

DATABASE_FILEPATH = r"c:\temp\test.mdb"
CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
  DATABASE_FILEPATH

if os.path.exists (DATABASE_FILEPATH):
   os.remove (DATABASE_FILEPATH)

adox = Dispatch ("ADOX.Catalog")
adox.Create (CONNECTION_STRING)
adox = None

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
  db.Execute ('CREATE TABLE dtest (id INT, data INT)')
  db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')

  try:
    db.Execute ('SELECT id, newdata FROM dtest')
  except:
    print "FAILED as expected"
  else:
    print "SUCCEEDED unexpectedly"

  try:
    db.Execute ('SELECT id, data FROM dtest')
  except:
    print "FAILED unexpectedly"
  else:
    print "SUCCEEDED as expected"

  adox = Dispatch ("ADOX.Catalog")
  adox.ActiveConnection = db
  adox.Tables ("dtest").Columns ("data").Name = "newdata"
  adox.Tables.Refresh ()
finally:
  db.Close ()

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
  
  try:
    db.Execute ('SELECT id, data FROM dtest')
  except:
    print "FAILED as expected"
  else:
    print "SUCCEEDED unexpectedly"

  try:
    db.Execute ('SELECT id, newdata FROM dtest')
  except:
    print "FAILED unexpectedly"
  else:
    print "SUCCEEDED as expected"

finally:
   db.Close ()

</code>

TJG


From daveparker at flamingthunder.com  Wed May 21 17:29:26 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 14:29:26 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
Message-ID: <6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>

On May 21, 3:17?pm, "Chris Mellon" <arka... at gmail.com> wrote:

> If you're going to use every post and question about Python as an
> opportunity to pimp your own pet language you're going irritate even
> more people than you have already.

Actually, I've only posted on 2 threads that were questions about
Python -- this one, and the one about for-loops where the looping
variable wasn't needed.  I apologize if that irritates you.  But maybe
some Python users will be interested in Flaming Thunder if only to
check the accuracy of the results that they're getting from Python,
like I did on this thread.  I think most people will agree that having
two independent programs confirm a result is a good thing.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May  7 03:59:06 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 07 May 2008 09:59:06 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <4821613f$0$4286$426a74cc@news.free.fr>

jmDesktop a ?crit :
(snip)

> On the dynamic typing,
> isn't that the same sort of thing that lots of scripting languages
> do?

This is not restricted to scripting languages - that is, unless you'd 
call Smalltalk, Erlang or common lisp "scripting languages".

Also and FWIW, static typing in C is mostly here to help the compiler 
optimizing, and it's very common to use void pointers and typecast to 
get some genericity (cf the sort() function in C stdlib). And you have 
the same pattern in Java with "generic" containers storing only "object" 
instances, then you have to cast your objects back to the appropriate 
type (which may fails, leading to a runtime error).

>  VBScript doesn't require you to define your variables,

You mean "to declare the type of your variables" ? Neither OCaml nor 
Haskell require this, and they are both statically and strongly typed.

> but I
> don't really want to use it for anything 

Neither do I, but not because of dynamic typing. By experience, dynamic 
typing works just fine for most applications. And by experience too, 
static typing doesn't magically make your code bullet-proof.

> (used to use it a lot in
> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  

Quite a lot of Java stopped making sens to me since I learned some other 
languages. And most of the "OO" (hem) complexity, patterns madness etc 
you'll typically find in Java code only exists because of the language's 
arbitrary restrictions and lack of expressivity.

Learn Python, learn Ruby or (preferably) Smalltalk, learn common lisp or 
(preferably) Scheme, learn OCaml or (preferably) Haskell, learn Erlang, 
and you'll find out that there's much more in programming and languages 
than can be dreamt of in Java's  philosophy !-)


From castironpi at gmail.com  Fri May 16 18:19:49 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:19:49 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>
Message-ID: <e7b9fdb8-5b15-49aa-a6ea-b27a3ee550a2@27g2000hsf.googlegroups.com>

On May 16, 4:29?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
>
>
>
>
>
> > On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > > i extract info from one file and put it into a dictionary.
> > > > i want to save that dictionary for later use, how do i do that?
> > > > might save a list of dictionaries or a list of classobjects too if
> > > > there is any difference.
>
> > > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > > ...
> > > Jay Graves
>
> > pickle.dumps(mg)
> > pickle.load(mg)
>
> > 'dict' object has no attribute 'readline'
> > dumps load(well i dont know but i get no complaint but running load
> > generates that error)
>
> What about *READING THAT FUCKING MANUAL* ?
>
> http://docs.python.org/lib/node316.html
> """
> dump(obj, file[, protocol])
> ? ? Write a pickled representation of obj to the open file object
> file. This is equivalent to Pickler(file, protocol).dump(obj).
>
> ? ? If the protocol parameter is omitted, protocol 0 is used. If
> protocol is specified as a negative value or HIGHEST_PROTOCOL, the
> highest protocol version will be used.
>
> ? ? Changed in version 2.3: Introduced the protocol parameter.
>
> ? ? file must have a write() method that accepts a single string
> argument. It can thus be a file object opened for writing, a StringIO
> object, or any other custom object that meets this interface.
>
> load(file)
> ? ? Read a string from the open file object file and interpret it as a
> pickle data stream, reconstructing and returning the original object
> hierarchy. This is equivalent to Unpickler(file).load().
>
> ? ? file must have two methods, a read() method that takes an integer
> argument, and a readline() method that requires no arguments. Both
> methods should return a string. Thus file can be a file object opened
> for reading, a StringIO object, or any other custom object that meets
> this interface.
>
> ? ? This function automatically determines whether the data stream was
> written in binary mode or not.
> """
>
> Example use:
>
>
>
> >>> d = dict(a=1, b=2)
> >>> f = open("mydict.dat", "w")
> >>> pickle.dump(d, f)
> >>> f.close()
> >>> f = open("mydict.dat")
> >>> d2 = pickle.load(f)
> >>> f.close()
> >>> d2 == d
> True
> >>> d2
> {'a': 1, 'b': 2}
>
> Now : it's not the first time - in a couple days - that you ask a
> question that you wouldn't have asked if you had taken a couple
> minutes doing the tutorial and/or reading the doc. This newsgroup is
> *very* tolerant (in most other places on usenet, you would have get a
> raw RTFM on the first question, and a PLONK on the second), but there
> are still limits, and as far as I'm concerned you're not far from
> them. So do yourself and the world a favour, read this:http://catb.org/~esr/faqs/smart-questions.html
>
> and then this:http://docs.python.org/tut/tut.html
>
> and next time someone points you to a specific module, have mercy and
> *read* the doc before posting.
>
> As far as I'm concerned, I won't anwser any of your questions unless
> it's obvious that you have followed these advices (but then I'll be
> happy to help if I can).- Hide quoted text -
>
> - Show quoted text -

There is 'shelve'.  It's just that you have to re-update each entry
when you modify, so it's just similarity you'd be saving.


From tjreedy at udel.edu  Thu May  8 17:04:35 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 17:04:35 -0400
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
	<op.uas99gjvev04yd@melwxp23><fvu3rf$je4$1@news.xmission.com>
	<op.uatraax1ev04yd@melwxp23>
Message-ID: <fvvpsv$4uf$1@ger.gmane.org>


"Kam-Hung Soh" <kamhung.soh at gmail.com> wrote in message 
news:op.uatraax1ev04yd at melwxp23...
| On Thu, 08 May 2008 15:42:07 +1000, dave <squareswallower at 1ya2hoo3.net>
| wrote:
| Your code is always going to return the same list because every word is 
an
| anagram of itself.
|
| Tip: Create a list for each dictionary key, then add a word to the list 
if
| that word is not in the list.  So:
|
| mapdic('adem') --> ["edam", "made"]

Unless you plan to keep the list in alphabetical order, a set might be 
slightly better.





From bignose+hates-spam at benfinney.id.au  Sat May 24 21:39:20 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:39:20 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
Message-ID: <87iqx39n7b.fsf@benfinney.id.au>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> You still need human testing and QA, the difference is that with a
> good set of unit tests you reduce the number of times code comes
> back from QA before it can be passed and make it more likely that
> the customer will be happy with the first version.

Paradoxically, you also end up writing less code that you would
otherwise.

Behaviour Driven Development insists that you be lazy in satisfying
the tests and implement only the simplest thing that could possibly
work (and refactor code whenever the unit test suite passes). This
results in never writing code into the application that isn't needed
to satisfy some unit test, saving a lot of fruitless coding time.

-- 
 \      "...one of the main causes of the fall of the Roman Empire was |
  `\        that, lacking zero, they had no way to indicate successful |
_o__)               termination of their C programs."  -- Robert Firth |
Ben Finney


From prisoner_at_war at yahoo.com  Mon May 26 05:21:06 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Mon, 26 May 2008 02:21:06 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
Message-ID: <f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>

On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
>
> The differences aren't so fundamental or important: it's not an entirely new language, just some ugly old things are being removed or changed in incompatible ways (at *some* time it was supposed to happen - but could not happen on the 2.x series which has to remain backwards compatible)
> Also, Python 3.0 will be released simultaneously with 2.6, and there will be other 2.x releases. Python 2 won't magically disappear from Earth, I don't think Linux distros will come with Python 3.0 by default anytime soon (perhaps not before 3.1).

But I'd read that Python 3 is very different in many important ways.
I read it right there on the Py3K site!  I can't make sense of how,
why, even what, exactly, but that's not a misimpression on my part, I
certain nonetheless...it's not just cosmetic changes but important
ones pertaining to a sort of "linguistic logic" I gather....

> So learning Python with a book targeted to 2.5 isn't a waste of time - not at all.

Well, I will be learning Python from the excellent materials available
online, to be sure, but a book that I spend money for, well, I have
"higher standards" for it, you know, one of which is that it doesn't
get superseded so soon!

> (This subject has already been discussed several times in this group.)

Oops, sorry!  Just thinking aloud a logical follow-up question....

> --
> Gabriel Genellina



From deets at nospam.web.de  Tue May 13 06:19:35 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 12:19:35 +0200
Subject: array in class
References: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
Message-ID: <68t8avF2uftkbU1@mid.uni-berlin.de>

alefajnie wrote:

> class A:
>    this_is_original_variable_only_for_one_inctance = 0
> 
>    def __init__(self, v):
>    self.this_is_original_variable_only_for_one_inctance = v
> 
> 
> class B:
>   this_is_common_for_all_instances = []
> 
>   def __init__(self, v):
>     self.this_is_common_for_all_instances.append(v)
> 
> 
> ----------------
> now I can create some instances of B, but all of them have the same
> array, why
> 
> if I use append for b1.this_is_common_for_all_instances, the b2, b3
> will have been changed that array.
> (where bi is instance of B)
> but changes on this_is_original_variable_only_for_one_inctance works
> fine
> 
> why it does that?
> and how create array in class - normal array, "private variable"

BOTH are at first class-wide. The difference is that the list is mutable,
and thus you alter the one list, whereas a number is not - and instead you
rebind a new object under the name now in the instance itself.

You need to understand that the way you "declared" the variables above is
NOT the way instance variables work in python. It can serve as neat trick
to initialize variables to common values - but *only* if you really know
the semantics.

Instead, the idiom for creating instance-variables (that you wrongly
called "private") is this:

class Foo(object):
   def __init__(self, some_value):
       self.some_var = some_value

The reason why the above seems to work is that a lookup of a name in python
on an instance is done like this:

if hasattr(self, name):
   return getattr(self, name)
else if hasattr(self.__class__, name):
   return getattr(self.__class__, name)

That is the reason why

class Foo(object):
    bar = 10
 
    def __init__(self):
        print self.bar

sees the 10 - it will first lookup on self, fail, and then lookup on Foo,
and succedd.

However, the assignment is *always* on the instance, or spelled out like
this:

setattr(self, name, value)

Thus 

self.name = 20

will create a new variable named "name" with the object it points to being
20.

There are some minor details here regarding the descriptor protocol and
such, but these aren't important for now.

So - stop "declaring" variables if you want them to be per-instance. Use the
above mentioned idiom of setting them on self inside __init__

Diez


From gagsl-py2 at yahoo.com.ar  Fri May 16 20:04:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 21:04:31 -0300
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <op.ua9uht0ax6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yinzhe at gmail.com>  
escribi?:

> Is there a simple way to get all the instances of one class? I mean
> without any additional change to the class.

Try with gc.get_referrers()

py> import gc
py> class A(object): pass
...
py> a,b,c = A(),A(),A()
py> A
<class __main__.A at 0x00A3F4E0>
py> for item in gc.get_referrers(A): print type(item)
...
<type 'getset_descriptor'>
<type 'getset_descriptor'>
<type 'tuple'>
<class '__main__.A'>
<class '__main__.A'>
<class '__main__.A'>
<type 'dict'>
<type 'dict'>

We need to filter that list, keeping only A's instances:

py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
[<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,  
<__main__.A object at 0x00A40E18>]

-- 
Gabriel Genellina



From mmanns at gmx.net  Mon May 26 17:11:25 2008
From: mmanns at gmx.net (Martin Manns)
Date: Mon, 26 May 2008 23:11:25 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <483a1319$0$34516$742ec2ed@news.sonic.net>
Message-ID: <g1f91t$rvh$1@aioe.org>

On Sun, 25 May 2008 18:46:27 -0700
John Nagle <nagle at animats.com> wrote:

> >>>> func_strings=['x', 'x+1', 'x+2', 'x']
> >>>> funclist = [eval('lambda x:' + func) for func in func_strings]
> 
>    What are you actually trying to do, anyway?  What's the
> application?
> 
>    You probably don't want to use "eval" that way.  If you want
> function objects out, use "compile".

I am writing on an application that I call pyspread
(http://pyspread.sourceforge.net).
It provides a grid (mapped to a numpy.array) into which users can type
in strings that contain python expressions.
Each expression is transformed into a function object in a second
numpy.array of the same size, so that each function can be called by
accessing the respective cell of the grid.

eval seems to work quite fine and provides nice access to globals,
system functions, modules, etc. Therefore, one can do general
programming tasks within the grid without worrying about cell
precedence.

compile returns code objects instead of function objects. I can of
course evaluate these code objects. However, when I store the code
objects, it is an extra operation each time I want to call the
function. So what is the benefit?

More specific: Is there any benefit of calling:

eval(compile(mystring, '', 'eval'))

instead of 

eval(mystring)

?

What are the drawbacks of my approach that I may be missing?
Any suggestions?

Best Regards

Martin


From gagsl-py2 at yahoo.com.ar  Sun May 18 11:05:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 12:05:41 -0300
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <op.ubcuvr1ix6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 10:36:28 -0300, Monica Leko <monica.leko at gmail.com> escribi?:

> On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
>
> Yes.
>
>> is the 10-bit
>> bit-pattern to be stored at an arbitrary bit-position in
>> the file
>
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

If you really need arbitrary bit sequences that aren't synchonized into bytes, I think there is a BitVector o BitArray package somewhere.
But if you mostly have bytes and sparsely a different size, I think the struct module and some gymnastics involving bitwise operations would be enough.

-- 
Gabriel Genellina



From CXDALTON at sentara.com  Fri May  2 16:45:57 2008
From: CXDALTON at sentara.com (CRAIG DALTON)
Date: Fri, 02 May 2008 16:45:57 -0400
Subject: Need help: Compiling Python-Code &In-Reply-To=
Message-ID: <20080502205253.EA6C11E4023@bag.python.org>

Hi, 

I'm looking to append several text files in one director and out put the combined files into another director. I'm new to Python and just can't get it to work. So far I've been able to create a file in the desired directory but it isn't pulling any of the data in the originating directory. Could please look at my code and tell me what I'm doing wrong.

import os,shutil
f=open("c:\\output\\testing1.txt","a+")
for r,d,fi in os.walk("c:\\test"):
    for files in fi:
        if files.endswith(".txt"):                         
            g=open(os.path.join(r+,files))
            shutil.copyfileobj(g,f)
            g.close()
f.close()

Any help would be great.

Thanks, 

Craig Dalton
Business Applications Systems Analyst
Sentara Healthcare Systems
Information Technology
cxdalton at sentara.com




From gherron at islandtraining.com  Wed May 28 12:30:54 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 28 May 2008 09:30:54 -0700
Subject: accessing class attributes
In-Reply-To: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <483D88BE.9020306@islandtraining.com>

eliben wrote:
> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> So, I've defined:
>
> class Game:
>   self.GameState = Enum('running', 'paused', 'gameover')
>   
That can't be what you've got.  But I think I can guess what you meant 
to show here.)
>   def __init__
>    ... etc
>   

Several options:

Define the Enum outside the class:
    GameState = Enum('running', 'paused', 'gameover')
then later
    class Game:
        ...
        if state == GameState.running:
            ...


Or just simply define some values
  RUNNING = 0
  PAUSED = 1
  GAMEOVER = 2
then later:
    class Game:
        ...
        if state == RUNNING:
            ...


Or try this shortcut (for the exact same effect):
  RUNNING, PAUSED, GAMEOVER = range(3)

Gary Herron






> Later, each time I want to assign a variable some state, or check for
> the state, I must do:
>
>   if state == self.GameState.running:
>
> This is somewhat long and tiresome to type, outweighing the benefits
> of this method over simple strings.
>
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?
>
> Thanks in advance
> Eli
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From carsten.haese at gmail.com  Sun May  4 17:37:03 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Sun, 04 May 2008 17:37:03 -0400
Subject: unicode newbie - printing mixed languages to the terminal
In-Reply-To: <mailman.558.1209935553.12834.python-list@python.org>
References: <mailman.558.1209935553.12834.python-list@python.org>
Message-ID: <30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>

David wrote:
> Hi list.
> 
> I've never used unicode in a Python script before, but I need to now.
> I'm not sure where to start. I'm hoping that a kind soul can help me
> out here.
> 
> My current (almost non-existant) knowledge of unicode:
> 
>>From the docs I know about the unicode string type, and how to declare
> string types. What I don't understand yet is what encodings are and
> when you'd want/need to use them. What I'd like is to just be able to
> print out unicode strings in mixed languages, and they'd appear on the
> terminal the same way they get shown in a web browser (when you have
> appropriate fonts installed), without any fuss.
> 
> Here is an example of how I'd like my script to work:
> 
> $ ./test.py
> 
> Random hiragana: <some jp characters>
> Random romaji: kakikukeko
> 
> Is this possible?
> 
>>From my limited knowledge, I *think* I need to do to things:
> 
> 1) In my Python script, run .encode() on my unicode variable before
> printing it out (I assume I need to encode into Japanese)
> 
> Question: How does this work when you have multiple languages in a
> single unicode string? Do you need to separate them into separate
> strings (one per language) and print them separately?
> 
> Or is it the case that you can (unlike a web browser) *only*
> display/print one language at a time? (I really want mixed language -
> English AND Japanese).
> 
> 2) Setup the terminal to display the output. From various online docs
> it looks like I need to set the LANG environment variable to Japanese,
> and then start konsole (or gnome-terminal if that will work better).
> But again, it looks like this limits me to 1 language.
> 
> If what I want to do is very hard, I'll output html instead and view
> it in a web browser. But I'd prefer to use the terminal instead if
> possible :-)

I suggest you read http://www.amk.ca/python/howto/unicode to demystify 
what Unicode is and does, and how to use it in Python.

Printing text from different languages is possible if and only if the 
output device (terminal, in this case) supports a character encoding 
that accommodates all the characters you wish to print. UTF-8 is a 
fairly ubiquitous candidate that fits that criteria, since it 
encompasses Unicode in its entirety (as opposed to latin-1, for example, 
which only includes a very small subset of Unicode).

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From banibrata.dutta at gmail.com  Tue May  6 04:23:08 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 13:53:08 +0530
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
In-Reply-To: <482010d3$0$12566$426a74cc@news.free.fr>
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr>
Message-ID: <3de8e1f70805060123o13cd0c81k2eac1d14f1d3329d@mail.gmail.com>

On 5/6/08, Bruno Desthuilliers
<bruno.42.desthuilliers at websiteburo.invalid> wrote:
> Nick Craig-Wood a ?crit :
> > Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
> >
> > >  I've gone through the list of "language differences" between 2.3 / 2.4
> > >  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
> > >  CPython, and I consider myself still very very newbie. So, unable to
> > >  take a call as to how-important or desirable the newer language
> > >  features are -- so whether to write my app for v2.5 of Python, versus,
> > >  as few others on this list have recommended, i.e. to stick to v2.3 ??
> > >  Are the preformance improvements, and memory footprint / leak fix in
> > >  2.5 enough to justify moving to it ? What all do I stand to lose (or
> > >  gain) by writing on v2.3 ??
> > >
> >
> > If you are writing for 2.3 you are writing for 2.4 and 2.5 also.
> >
> > There are some nice things in 2.4 and 2.5 but nothing you really need
> > IMHO.
> >
>
> There are some nice things in Python but nothing you really need neither -
> could have the same result in C or assembly !-)
>
> <OP>
> Ok, if you're newbie to programming, the new stuff in 2.4 and 2.5 might not
> be that useful to you right now. But the real question is mostly: do you
> have any reason to stick to 2.3 ?
> </OP>

Newbie to Python yes, not to programming. But does that change
anything -- i.e. to impact my decision ?

> > >  I've a constraint due to which I might have to also write parts of my
> > >  app (client side) in Jython (because I want to eventually ship Java --
> > >  yet benefit from the rapid development and clarity of Python). Would
> > >  sticking to v2.3 in such a case be a better idea ? Suggestions with
> > >  reasoning would be very helpful.
> > >
> >
> > Jython seems to be based off python 2.2
> >
>
> It is so far. But Sun recently hired Jython's maintainers, so we may have a
> much more up to date Jython version in a foreseeable future.

Well, I need to start somewhere, and I want that "somewhere" to be a
decent-enough point.  :-)

As such 2.6 & 3.0 are also cooking, but from what I see on the mailing
list, some of the features are a bit controversial. So if I start with
2.5 now, unless there are some break-thru preformance gains, or
annoying defects fixed, I'd stick to it. If I can do something
"well-enough" with 2.5, I'd not refactor for 2.6, for quite some
fore-seeable future.


From benjamin.fremiot at gmail.com  Mon May 12 04:49:22 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 01:49:22 -0700 (PDT)
Subject: Import/Create module from buffer
Message-ID: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>

Hi people,

I'm currently working on python embedding with C++. My goal is that
the C++ part handle files writing/reading so that the Python part only
works with buffers.

I succeeded in buffer exchanges. The problem is that some of the files
I read/write are python files so that, before embedding, I imported
them as modules when I needed them.

But now that the Python part only receive buffers, I can't do it
anymore. So I wonder :
- is it possible to import module from a buffer instead of files?
- or is it possible to create a module object from my buffer?

I looked on the Internet but didn't find anything about that. Does
anyone have an idea?

Thanks
Benjamin


From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 14:57:27 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 13:57:27 -0500
Subject: People still using Tkinter?
In-Reply-To: <4825cd01$0$14982$9b622d9e@news.freenet.de>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
	<mailman.906.1210435115.12834.python-list@python.org>
	<4825cd01$0$14982$9b622d9e@news.freenet.de>
Message-ID: <8E6E31ED-9D5C-4008-86AB-C264ADCF5965@sbcglobal.net>

The only trick it that sometimes it isn't obvious how to make the Tcl/ 
Tk call via Python.

Ken

On May 10, 2008, at 11:27 AM, Martin v. L?wis wrote:

>> I am, but "still" isn't the word, I just started.  Good, *complete*
>> docs seem to be hard to find, but using a combination of the free
>> resources and going back and forth between them seems to work all
>> right so far.
>
> IMO, the trick really is to also have a Tk documentation around.
> If you need to find out what option is supported by what widget,
> there isn't really much point in duplicating that information in
> Tkinter, IMO - the Tk documentation has it all.
>
> Regards,
> Martin
> --
> http://mail.python.org/mailman/listinfo/python-list



From aisaac at american.edu  Fri May 30 16:39:35 2008
From: aisaac at american.edu (Alan G Isaac)
Date: Fri, 30 May 2008 16:39:35 -0400
Subject: should I put old or new style classes in my book?
In-Reply-To: <m2od6ob4mj.fsf@googlemail.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
	<m2od6ob4mj.fsf@googlemail.com>
Message-ID: <3t6dnfCz_cCV-93VnZ2dnUVZ_h7inZ2d@rcn.net>

> Alan Isaac <aisaac at american.edu> writes:
>> I take it from this thread that in Python 3 the following are
>> equivalent:

>>        class Test: pass

>>        class Test(object): pass


Arnaud Delobelle wrote:
> I don't know where it is stated, but how could they *not* be
> equivalent?

The most obvious way would be that the former became an illegal
syntax.  But in Python 3 alpha, it is accepted, so I assume that it
will continue to be?

Cheers,
Alan Isaac


From google at mrabarnett.plus.com  Tue May 20 17:41:48 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 20 May 2008 14:41:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
Message-ID: <94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>

On May 20, 4:33 am, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 14, 7:59 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
> > Would it be valid to say:
>
> > x = "concrete"
>
> > or to say:
>
> > if command (is) set to "quit"
>
> > ??????
>
> I like the idea of:
>
> If command is set to "quit" ...
>
Or just:

If command is "quit" ...

> I've added it to my list of things to think about, and possibly
> implement.



From yves at zioup.com  Fri May  2 11:43:35 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 15:43:35 GMT
Subject: help with list comprehension
In-Reply-To: <dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
Message-ID: <HEGSj.107879$rd2.20591@pd7urf3no>

George Sakkis wrote:

> Another alternative is:
> 
> from operator import itemgetter
> 
> def m3():
>     colours, nums = zip(*map(itemgetter('colour','num'), l))
> 
> It's slower than m1() but faster than m2(); it's also the most
> concise, especially if you extract more than two keys.

Good you guys gave me some ideas, I've made m3() work:

def m3()
   total = [ [e['colour'], e['num'], e['couleur']] for e in l ]
   c,d,e = zip(*total)
   return map(list, [c,d,e])

(I have to transform to lists, I need to transform them later on, so tuples 
won't work).

Unfortunately the timing is inconsistant, the first time I run
python -m timeit 'import listcomp ; listcomp.m1()'

m1 is the fastest. But then if I run the test several times, they all seem 
to be about the same time ; I'll have to try with a large list.

Now here is a question:
Is there any way to change my first line there for the list comp. to return 
a list of lists rather than a list of tuples ?


From frikker at gmail.com  Wed May 28 19:45:07 2008
From: frikker at gmail.com (blaine)
Date: Wed, 28 May 2008 16:45:07 -0700 (PDT)
Subject: FW: php vs python
References: <mailman.1701.1212008396.12834.python-list@python.org>
Message-ID: <1cc9a56b-c1d4-4fad-968b-a87684ccfc12@l64g2000hse.googlegroups.com>

On May 28, 4:47 pm, "Phil Runciman" <ph... at aspexconsulting.co.nz>
wrote:
> -----Original Message-----
> From: Jerry Stuckle [mailto:jstuck... at attglobal.net]
> Sent: Wednesday, 28 May 2008 1:48 p.m.
> To: python-l... at python.org
> Subject: Re: php vs python
>
> Ivan Illarionov wrote:
> > On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>
> >> Greetings, Ivan Illarionov.
> >> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>
> >>>> As I've said before - good programmers can write good code in any
> >>>> language.
> >>> Yes, they can. But it may be harder to do for them in one language
> and
> >>> easier in another.
> >> It's obvious lie. If you have clear mind and you know language you're
> >> using, there are absolutely NOTHING can deny you to write clear code.
> >> Even using forth postfix notation, I have no problem writing good
> code,
> >> it's as easy as writing bad code. And yes, I do see the difference.
>
> > No. Language does matter.
>
> Yes it does matter.
>
> I have programmed in many assembly and higher level languages.
>
> In OldenTimes:
> In Algol 60 I was productive from the start.
> KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
> made it even better).
> IBM 360 Assembly was poorer but not a disaster.
> PL1 was a mess. You could write good code but why bother?
> COBOL was fit for purpose and when combined with Jackson structured
> programming could be used straight away by rooky programmers in business
> systems programming. I am sure it has progressed since ANSI 68.
>
> The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
> if language does not matter?
>
> My 2c worth.

http://www.fukung.net/v/7729/php_vs_python.png
:)


From inhahe at gmail.com  Fri May 16 12:24:23 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:24:23 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
Message-ID: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>


"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:mailman.1232.1210952591.12834.python-list at python.org...
>
> 2. Once the code is functioning, benchmark it and find the
> bottlenecks.  Replace the problem methods with a C extension.  Refactor
> (and check your unit tests again) if needed to break out the problem
> areas into as small a piece as possible.

There's probably only 2 or 3 basic algorithms that will need to have all 
that speed.

>
> 3.  If it is still slow, embed some assembler where it is slowing down.
>

I won't know if the assembler is faster until I embed it, and if I'm going 
to do that I might as well use it.
Although it's true I'd only have to embed it for one system to see (more or 
less).

>
>> For portability, I'd simply write different asm routines for different
>> systems.  How wide a variety of systems I'd support I don't know.  As a 
>> bare
>> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms 
>> of
>> SIMD.
>
> Even on the same processor you may have different assemblers depending
> on the OS.

yeah I don't know much about that,  I was figuring perhaps I could limit the 
assembler parts / methodology to something I could write generically 
enough.. and if all else fails write for the other OS's or only support 
windows.   also I think I should be using SIMD of some sort, and I'm not 
sure but I highly doubt C++ compilers support SIMD.




From python at bdurham.com  Tue May  6 09:11:29 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 09:11:29 -0400
Subject: Module to read input from commandline
Message-ID: <1210079489.22730.1251666281@webmail.messagingengine.com>

James,

Check out the optparse module as well. The optparse module supercedes(?)
the cmd module and offers a lot more functionality.

Malcolm


From gandalf at shopzeus.com  Mon May 19 05:06:05 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 19 May 2008 11:06:05 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
Message-ID: <483142FD.4060700@shopzeus.com>


> It is possible to change the serialization used by Pyro
>
>   http://pyro.sourceforge.net/manual/9-security.html#pickle
>
> to the the 'gnosis' XML Pickler.
>   
As I said earlier, I would not use XML. Just an example - I need to be 
able to transfer image files, word and excel documents. How silly it 
would be to base64encode a binary file, then put it into an XML.

  L



From deets at nospam.web.de  Tue May  6 07:00:14 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 13:00:14 +0200
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
Message-ID: <68as2qF2r15d8U1@mid.uni-berlin.de>

artasis at gmail.com wrote:

> Hi, that is my task:
> I need to create python webserver-like extension(dll) which will run
> php and python scripts as plugins.
> I have no problems with dll creating and run python scripts, but I
> cannot understand how to run php(CLI is not a solution).
> Is there a way to solve this problem? I've thought to implement php to
> HTTPServer-like python module, but as I see it's impossible. Solutions
> with creating intermediate C-based module is allowed, but better
> without them :).
> AFAIK, php5ts.dll is that what I must use but how integrate it to
> python webserver? that is a question

http://www.amazon.com/Extending-Embedding-PHP-Developers-Library/dp/067232704X

Might be of help.

And maybe the roadsend PHP-compiler.

Diez


From rupole at hotmail.com  Fri May 30 00:06:38 2008
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 30 May 2008 00:06:38 -0400
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com><mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
Message-ID: <g1nugf$8vc$1@ger.gmane.org>

Kalibr wrote:
> On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>>
>> You can use the shell COM objects to access media properties
>> as shown by Explorer.
>>
>> import win32com.client
>> sh=win32com.client.Dispatch('Shell.Application')
>>
>> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
>> ns=sh.NameSpace(folder)
>>
>> ## the column index for Artist may vary from folder to folder
>> for c in range(0,255):
>>     colname=ns.GetDetailsOf(None, c)
>>     if colname=='Artists':  ## This shows up as just Artist on XP
>>         for i in ns.Items():
>>             artist=ns.GetDetailsOf(i, c)
>>             if artist:
>>                 print ns.GetDetailsOf(i, 0), artist
>>         break
>>
>>             Roger
>
> I shall give that a go. (is the module you reference this one?
> http://python.net/crew/mhammond/win32/Downloads.html )
> --

That's the one.

       Roger





From arnodel at googlemail.com  Tue May  6 11:29:21 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:29:21 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <m28wyn78oe.fsf@googlemail.com>

jmDesktop <needin4mation at gmail.com> writes:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

You're not missing anything.  An Interface is the Poor Man's Multiple
Inheritance.  But in truth, even without multiple inheritance, Python
wouldn't need java-like interfaces.

-- 
Arnaud


From python at hope.cz  Sat May 17 11:58:38 2008
From: python at hope.cz (Johny)
Date: Sat, 17 May 2008 08:58:38 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<mailman.1235.1210959453.12834.python-list@python.org>
Message-ID: <1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>

Thanks for your reply.Is it possible to delete a record by using the
module?
Thanks
L>


From castironpi at gmail.com  Mon May 12 21:12:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:12:06 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
Message-ID: <a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>

On May 12, 7:59?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 6:32?pm, castiro... at gmail.com wrote:
>
> > Can you render some furniture for me... to try to see some human
> > posture to lowest energy levels.
>
> I couldn't find any furniture created using DPGraph, but the math art
> gallery athttp://www.dpgraph.com/math-art.htmlhas a sailboat, an
> F15, Tux (the Linux penguin), a lampshade, and lots of other things
> that will soon be doable in Flaming Thunder.

Mine's been always messing up the color wheel.  Do you see anything
analytic* / theoretically necessary / a priori / physical / physically
induced about that?

*Now that's a word from Philosophy Syntax--- pertaining to inherent
definitions of words, any and all.


From bob at passcal.nmt.edu  Thu May 22 13:32:13 2008
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Thu, 22 May 2008 11:32:13 -0600
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <2008052211321316807-bob@passcalnmtedu>

On 2008-05-20 13:18:08 -0600, Bob Greschke <bob at passcal.nmt.edu> said:

> This MUST have been asked before, but I can't seem to Google the right 
> thing. ?How can I get a list of drives on a Windows box, like ["C:\", 
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
> 
> Thanks!
> 
> Bob

Thanks for the ideas, guys!  It's off to the emacs...




From duncan.booth at invalid.invalid  Fri May  9 08:40:12 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 12:40:12 GMT
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <Xns9A998B05A941Aduncanbooth@127.0.0.1>

Viktor <alefnula at gmail.com> wrote:

> Can somebody give me an explanation what happened here (or point me to
> some docs)?
> 
> Code:
> 
> HMMM = None
> 
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)
>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)
> 
> 
> 
> Output:
> 
> fn: 10404208
> HMMM: 10404208
> wrapper: 10404272
> A.__init__: 10376136
> A.__init__.i: 10404208
> HMMM: 505264624
> 
> 
> 
> Why did HMMM changed his id?!

It didn't: global HMMM refers to None both before and after executing 
the rest of your code. The other HMMM is local to a particular 
invocation of w. Try the same steps interactively (and try printing the 
values not just the ids) and it may be more obvious:

>>> HMMM = None
>>> print 'HMMM:', id(HMMM)
HMMM: 505264624
>>> def w(fn):
    print 'fn:', id(fn)
    HMMM = fn
    print 'HMMM:', id(HMMM)
    def wrapper(*v, **kw):
        fn(*v, **kw)
    wrapper.i = fn
    print 'wrapper:', id(wrapper)
    return wrapper

>>> class A:
    @w
    def __init__(self): pass

    
fn: 18299952
HMMM: 18299952
wrapper: 18300016
>>> print 'HMMM:', id(HMMM), HMMM
HMMM: 505264624 None
>>> 


From grante at visi.com  Mon May 12 10:34:48 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:34:48 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
Message-ID: <bZ-dnf18yc0VyLXVnZ2dnUVZ_hjinZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

>> Maybe my brain works differently, but I find both "dummy" and
>> "unused" are extremely confusing names for loop counters. The loop
>> begins to look like it doesn't iterate at all if its counter is
>> dummy or unused.
>> 
>> If it *counts* it is *used* and it's *not* dummy.
>
> The value is unused by any of the code inside the block. For the
> purposes of that block, it is a dummy value.

The value may be unused, but for me it's the name that matters,
not the value.   The name might be in use by other code, and
the careless choice of a "dummy" name that's _supposed_ to be
unused has broken code precisely becuase the name was being
used (for something else).  Requiring that the user pollute a
namespace with a useless name is a wart.

> That is also regrettably common in Python code. It still
> suffers from being unnecessarily ambiguous, since there are
> *also* plenty of loops using 'i', 'j', etc. where the loop
> counter *is* used.

Perhaps I'm the only one who's ever been stupid enough to
overwrite an index named "i" (that is being used) with another
index named "i" (that isn't being used)...


-- 
Grant Edwards                   grante             Yow! All of life is a blur
                                  at               of Republicans and meat!
                               visi.com            


From wuwei23 at gmail.com  Fri May  9 00:04:39 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 8 May 2008 21:04:39 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
Message-ID: <b8b1a978-5b94-4667-b722-f5502be8270b@q1g2000prf.googlegroups.com>

On May 9, 1:42 pm, yhvh <yhvh2... at googlemail.com> wrote:
> I want to generate a range with variable leading zeros
>
> x = [0010, 0210]
> padding = len(x[1])
>
> for j in range(x[0], x[1]):
>     print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}
>
> This is syntactically incorrect, you can't insert a variable into the
> string format options. Any ideas?

Concatenate the parts of the pattern string first:

pat = '%0' + str(padding) + 'd'


From deets at nospam.web.de  Tue May 13 05:18:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 11:18:17 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
Message-ID: <68t4o0F2vaoncU1@mid.uni-berlin.de>

Dave Parker wrote:

> On May 12, 7:20?pm, castiro... at gmail.com wrote:
>>Yes, I am trying to visualize something.
> 
> If it is related to making furniture comfortable for humans, have you
> considered painting the furniture with thermochromic paint (
> http://en.wikipedia.org/wiki/Thermochromism )?  It changes color in
> response to temperature, which in part is determined by how hard a
> body is pressed against it because close contact tends to trap heat.
> An evenly distributed color might indicated evenly distributed
> pressure.

Don't let yourself be irritated by castironpi - he's the virtual equivalent
of a mumbling mad man in this group. Ignorance serves best as remedy - and
getting a filter to work, as I did (so I only see his postings being
quoted... a huge relief!)

Diez


From marc.messina at sbcglobal.net  Thu May  8 12:17:51 2008
From: marc.messina at sbcglobal.net (delta2)
Date: Thu, 8 May 2008 09:17:51 -0700 (PDT)
Subject: Python Math libraries - How to?
In-Reply-To: <fv655i$idi$1@aioe.org>
References: <c976d662-13c3-44ed-b9bd-67104a0ee63f@m44g2000hsc.googlegroups.com>
	<fv655i$idi$1@aioe.org>
Message-ID: <17127534.post@talk.nabble.com>


I am also using Zelle's book to teach myself programming and Python.  I also
had a problem with " import math ", but the alternative of " from math
import * "  is working for me.  I don't know why one works and the other
doesn't.


Cousin Stanley-3 wrote:
> 
> 
>>
>> Here is the arithmetic program I made that it worked before I added
>> the "import math" line.  
>>
>> #volumen.py
>> # A program to compute the volume and surface area of a sphere
>> import math
>>
>> ....
>> NameError: global name 'pi' is not defined
>> ....
> 
>>>> from math import *
>>>>
>>>> def surface( r ) :
> ...     return 4 * pi * r ** 2
> ...
>>>> def volume( r ) :
> ...     return ( 4. / 3. ) * pi * r ** 3
> ...
>>>> for n in range( 1 , 11 ) :
> ...     s = surface( n )
> ...     v = volume( n )
> ...     print '    %2d .... %9.4f .... %9.4f ' % ( n , s , v )
> ...
> 
> 
> -- 
> Stanley C. Kitching
> Human Being
> Phoenix, Arizona
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

-- 
View this message in context: http://www.nabble.com/Python-Math-libraries---How-to--tp16952032p17127534.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From pupeno at pupeno.com  Sat May 17 13:43:33 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Sat, 17 May 2008 10:43:33 -0700 (PDT)
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<482EF709.3000604@behnel.de>
Message-ID: <8ea36733-c9bb-4193-a309-d14af8f134c9@f63g2000hsf.googlegroups.com>

On May 17, 4:17?pm, Stefan Behnel <stefan... at behnel.de> wrote:
> J. Pablo Fern?ndez wrote:
> > I have an XML file that starts with:
>
> > <vortaro>
> > <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> > <kap>
> > ? <ofc>*</ofc>-<rad>a</rad>
> > </kap>
>
> > out of it, I'd like to extract something like (I'm just showing one
> > structure, any structure as long as all data is there is fine):
>
> > [("ofc", "*"), "-", ("rad", "a")]
>
> ? ? >>> root = etree.fromstring(xml)
> ? ? >>> l = []
> ? ? >>> for el in root.iter(): ? ?# or root.getiterator()
> ? ? ... ? ? l.append((el, el.text))
> ? ? ... ? ? l.append(el.text)
>
> or maybe this is enough:
>
> ? ? list(root.itertext())
>
> Stefan

Hello,

My object doesn't have iter() or itertext(), it only has:
iterancestors, iterchildren, iterdescendants, itersiblings.

Thanks.


From zhalbrecht at gmail.com  Tue May 20 16:05:53 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 13:05:53 -0700 (PDT)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
	<m2lk247vdd.fsf@googlemail.com> <g0uno9$i5i$1@news.lysator.liu.se>
Message-ID: <7e73581b-6e8f-417c-9d34-0608164d2517@w5g2000prd.googlegroups.com>

On May 20, 10:38 am, Thomas Bellman <bell... at lysator.liu.se> wrote:
> Arnaud Delobelle <arno... at googlemail.com> wrote:
> > from collections import defaultdict
> > d = defaultdict(int) # That means the default value will be 0
> > for person in people:
> >     d[person.fav_food] += 1
>
> Ah!  I didn't think of using int as the factory function.  If you
> use this, then I believe the warning I gave about performance
> does not apply; my understanding is that calling built-in functions
> (like the int constructor) is fast.
>
> --
> Thomas Bellman,   Lysator Computer Club,   Link?ping University,  Sweden
> "Beware of bugs in the above code; I have    !  bellman @ lysator.liu.se
>  only proved it correct, not tried it."      !  Make Love -- Nicht Wahr!

Arnaud, that is so badass re: int


From sturlamolden at yahoo.no  Sat May  3 18:05:31 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sat, 3 May 2008 15:05:31 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
	<b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>
Message-ID: <d8e056dd-95bf-4704-9dc0-79310db50e32@a23g2000hsc.googlegroups.com>

On May 3, 10:13 pm, hdante <hda... at gmail.com> wrote:

>  I believe that moving this to third party could be better. What about
> numpy ? Doesn't it already have something similar ?

Yes, Kahan summation makes sence for numpy arrays. But the problem
with this algorithm is optimizing compilers. The programmer will be
forced to use tricks like inline assembly to get around the optimizer.
If not, the optimizer would remove the desired features of the
algorithm. But then we have a serious portability problem.


From martin at marcher.name  Tue May 20 17:44:36 2008
From: martin at marcher.name (Martin Marcher)
Date: Tue, 20 May 2008 23:44:36 +0200
Subject: preserve history in the interactive python
In-Reply-To: <g0v4n8$4dk$1@registered.motzarella.org>
References: <g0v49v$2ab$1@registered.motzarella.org>
	<g0v4n8$4dk$1@registered.motzarella.org>
Message-ID: <5fa6c12e0805201444x55e2660dne2d7973e0724c98e@mail.gmail.com>

Hi,

On Tue, May 20, 2008 at 8:19 PM, Nikhil <mnikhil at gmail.com> wrote:
> Nikhil wrote:
>> the previous interactive shell. Basically, is there anyway that I can
>> preserve the history in the shell?
>
> I figured it out. This below thing works fine for me.
> BTW, I got it from http://docs.python.org/tut/node15.html. A little search

Didn't even think of that, now that I have it: I love you - it's great.

To the one that implemented this: If you ever come to vienna, drop me
a note I'll get you a $FAVORITE_DRINK_HERE

/martin

-- 
http://www.xing.com/profile/Martin_Marcher

You are not free to read this message,
by doing so, you have violated my licence
and are required to urinate publicly. Thank you.


From bignose+hates-spam at benfinney.id.au  Mon May 12 03:40:06 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 17:40:06 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
	<g08pnf$2lbi$1@news.mtu.ru>
Message-ID: <877ie06kdl.fsf@benfinney.id.au>

Ivan Illarionov <ivan.illarionov at gmail.com> writes:

> On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote:
> [...]
> > That is also regrettably common in Python code. It still suffers
> > from being unnecessarily ambiguous, since there are *also* plenty
> > of loops using 'i', 'j', etc. where the loop counter *is* used.
> > 
> > Differentiating these use cases by appropriate naming is, IMO,
> > worth the effort of choosing a meaningful name.
> 
> Even if the counter is not used inside the loop's body it's still in
> control of the whole loop

Not in Python it's not. The values that come out of the iterator
aren't "in control of the loop". The state for the loop is in the
*iterator*, not the values that come out.

Having access to the values that come from the iterator is usually
useful, but regardless of whether one uses them or not, they're *not*
controlling the loop, and it's confusing to imply that they are.

So, when not using the values that come from the controlling iterator,
it's good to make that explicit. If Python supported it, we might
prefer to use no name at all for something that isn't used, but the
'for' syntax doesn't allow that.

In the absence of supporting syntax, the next best thing is to choose
a name that *does* make it explicit that the values will not be used.

-- 
 \         ?All television is educational television. The question is: |
  `\                           what is it teaching?? ?Nicholas Johnson |
_o__)                                                                  |
Ben Finney


From smitty1e at gmail.com  Fri May  2 22:16:57 2008
From: smitty1e at gmail.com (smitty1e)
Date: Fri, 2 May 2008 19:16:57 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
Message-ID: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>

Just a fun exercise to unify some of the major input methods for a
script into a single dictionary.
Here is the output, given a gr.conf file in the same directory with
the contents stated below:

smitty at localhost ~/proj/mddl4/test $ ./inputs.py
{'source_db': '/home/sweet/home.db'}
smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
{'source_db': 'test_env'}
smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
{'source_db': 'test_cli'}


For the file
=========
#!/usr/bin/env python

#Goal: unification of environment variables, command line, and
# configuration file settings.
# The .conf file is the specification.
# Optional environment variables can override.
# Optional command-line inputs trump all.
# Example is a file spec for a source database for an application.
# .conf has a contents like:
#================================
# [CONF]
# source_db=/home/sweet/home.db

#TODO:
# 1. Decide (make an option?) to retain the simple dictionary or build
a
#     class from the options.
# 2. Allow for multiple .conf locations, trying to be cool like
#     xorg.conf

from   ConfigParser import SafeConfigParser
from   optparse     import OptionParser
import os

CONF      = "CONF"         #section in .conf file
CONF_FILE = "gr.conf"      #name of config file
PLACEBO   = "placebo"      #mindless default that we don't want
gconf     = {}             #all your config are belong to here
parser    = OptionParser()
parser.add_option( "-f"    , "--file"
                 , dest    = "source_db"
                 , help    = "source database"
                 , default = PLACEBO           )
(cl_opts, args)  = parser.parse_args()

config    = SafeConfigParser()
config.read(CONF_FILE)
file_conf = dict(config.items(CONF))

for k in file_conf:

       gconf[k]=file_conf[k]

       if os.environ.has_key(k):
               gconf[k] = os.environ[k]

       if cl_opts.__dict__.has_key(k):
              if cl_opts.__dict__[k]!=PLACEBO:
                     gconf[k] = cl_opts.__dict__[k]
print gconf


From Scott.Daniels at Acm.Org  Mon May 12 22:47:28 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 12 May 2008 19:47:28 -0700
Subject: anonymous assignment
In-Reply-To: <f0PVj.262779$pM4.237055@pd7urf1no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
Message-ID: <Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>

Yves Dorfsman wrote:
> ... Sorry this was a typo (again :-), I meant:
> d = time.local()
>   y = d[0]
>   d = d[2]
Then:
     y, d = list(time.localtime())[:4:2]

--Scott David Daniels
Scott.Daniels at Acm.Org


From dulipishi at gmail.com  Thu May 22 11:55:32 2008
From: dulipishi at gmail.com (duli)
Date: Thu, 22 May 2008 08:55:32 -0700 (PDT)
Subject: Books for learning how to write "big" programs
Message-ID: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>

Hi:
I would like recommendations for books (in any language, not
necessarily C++, C, python) which have walkthroughs for developing
a big software project ? So starting from inception, problem
definition, design, coding and final delivery on a single theme
or application.

Most of the code I have written and books that I have read deal with
toy programs and I am looking for something a bit more
comprehensive.  For example, maybe a complete compiler written in C++
for some language, or a complete web server or implementing
.net libraries in some language (just a few examples of the scale of
things I am interested in learning).

Thanks!
Duli.




From daveparker at flamingthunder.com  Wed May 21 15:53:22 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 12:53:22 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
	<7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
	<mailman.1446.1211398194.12834.python-list@python.org>
Message-ID: <7a2dcc0b-001a-433a-ad1d-0eb3f1254350@q24g2000prf.googlegroups.com>

On May 21, 1:29?pm, "Dan Upton" <up... at virginia.edu> wrote:

> ... --somewhat akin to the
> guy who a month or so ago wanted to sneakily teach his high school
> class programming fundamentals by teaching them game programming.

Yep, that's kind of my plan, too.  After I get enough "computer
languagey" stuff running, I'm going to incorporate the 3D graphics
from DPGraph.

> Maybe this should be your selling point, and maybe you should be
> drawing comparisons to programming in Matlab or Mathematica.

That sounds like a good idea.

Personally, the first thing I wanted to get running in Flaming Thunder
was the ability to cross-compile CGI scripts for Linux under Windows,
because some inexpensive web-hosting sites (such as GoDaddy) don't
allow shell access, so I couldn't compile the CGI scripts natively.
Also, the ability to cross-compile programs for the Mac since Macs
often appear in educational settings.

Now that those are up and running and Flaming Thunder is released to
the public, I'm adding features as prioritized by customer requests.
Currently, the highest big things on the list are arrays/matrices and
3D graphics.  Next on the list is improved symbolics.


From castironpi at gmail.com  Fri May 16 10:10:38 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:10:38 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
	<57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com>
Message-ID: <52d91619-d8bf-47cb-8a69-5604f71dc45c@e39g2000hsf.googlegroups.com>

On May 16, 8:35?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
> > 42.desthuilli... at websiteburo.invalid> wrote:
> > > Kay Schluehr a ?crit :
>
> > > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > > >> Hello all,
>
> > > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > > >> It appeared to be the following:
>
> > > >> class A(object):
> > > >> ? ? pass
>
> > > >> print min(1.0, A())
>
> > > >> which is accepted by Python even though the A() object is not numerical in
> > > >> nature.
>
> > > >> The cause of this behavior seems to be the compare operation of the object
> > > >> class.
>
> > > >> Is there a way to disable this behavior in Python (other than deriving a new
> > > >> 'object-like' class that doesn't do comparisons?)
>
> > > > Are you sure you don't want to use a statically typed language that
> > > > captures all type errors just by inspecting your source code?
>
> > > This is not necessarily a static vs dynamic typing problem. The
> > > following code will raise a TypeError for very good reasons:
>
> > > ? ? print 1.0 + A()- Hide quoted text -
>
> > > - Show quoted text -
>
> > I question the real-world examples of coercion, casting, and
> > upcasting. ?C insists that defining by operator, which may or may not
> > relate to system, is the only legal move. ?I doubt operator+ is well-
> > defined on non-ideal structures. ?Rationals are not floats, but system
> > got checked. ?Define concurrency.- Hide quoted text -
>
> > - Show quoted text -
>
> I would be bouncing localcy and remoticy. ?What word's on the bar?- Hide quoted text -
>
> - Show quoted text -

Can you suffixize words?  I have corner, cornercy, lunacy, emphatic,
emphasize, a value of Y, orderings, say, remoticy, & cross.  Come do
graphics.  Anybody speak?

For verbs, I have: say, speak, see, talk, and stack.  Pretty
harmless.  Still here?


From bj_666 at gmx.net  Sun May  4 00:08:34 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 4 May 2008 04:08:34 GMT
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
Message-ID: <684r62F2rmn3gU2@mid.uni-berlin.de>

On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:

> I'm actually curious if there's a way to write a generator function
> (not a generator expression) in C, or what the simplest way to do it
> is... besides link the Python run-time.

The reference implementation of Python is written in C, so obviously there
must be a way to write something like generators in C.

Ciao,
	Marc 'BlackJack' Rintsch


From vbgunz at gmail.com  Wed May 14 12:25:40 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 09:25:40 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>

> > > Instance methods make the most sense. A static method makes sense too
> > > *but* I can see how a class method not only does what a static method
> > > does but how a class method *also* gets the cls reference for free.
>
> > I don't understand the last part - but I certainly agree on the "instance
> > methods make the most sense". But *if* you want a hierarchy
> > of "sensefulness",
>
> > method > classmethod > staticmethod

Sorry I quoted this earlier and meant to respond to it. What I meant
was, might as well use a class method over a static method AND in
doing so, cls is free. I sort of repeated the same thing over and
over. I think my main concern was trying to make sure I could grasp at
least that much.


From arnodel at googlemail.com  Tue May 20 11:17:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 16:17:12 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <m2tzgt6m4n.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>> I posted this code last night in response to another thread, and after I
>> posted it I got to wondering if I had misused the list comprehension. Here's
>> the two examples:
>>
>> Example 1:
>> --------------------
>> def compress(s):
>> ? ? new = []
>>
>> ? ? for c in s:
>> ? ? ? ? if c not in new:
>> ? ? ? ? ? ? new.append(c)
>> ? ? return ''.join(new)
>> ----------------------
>>
>> Example 2:
>> ------------------------
>> def compress(s):
>> ? ? new = []
>> ? ? [new.append(c) for c in s if c not in new]
>> ? ? return ''.join(new)
>> --------------------------
>>
>> In example 1, the intention to make an in-place change is explicit, and it's
>> being used as everyone expects it to be used. In example 2, however, I began
>> to think this might be an abuse of list comprehensions, because I'm not
>> assigning the result to anything (nor am I even using the result in any
>> way).
>>
>> What does everyone think about this? Should list comprehensions be used this
>> way, or should they only be used to actually create a new list that will
>> then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?
>
> def compress(s):
>     seen = set()
>     new = [c for c in s if c not in seen and (seen.add(c) or True)]

<split hairs>
Isn't 

    c not in seen and (seen.add(c) or True)

the same as

    seen.add(c) or c not in seen

?

>     return ''.join(new)
>

(notice I haven't closed the tag!)

-- 
Arnaud


From seymour.morris at gmail.com  Sat May  3 22:27:59 2008
From: seymour.morris at gmail.com (SFM)
Date: Sat, 3 May 2008 19:27:59 -0700 (PDT)
Subject: Help - IDLE Debugger Source Checkbox??
Message-ID: <80a1e892-c154-4a06-a211-936fedbd75be@8g2000hse.googlegroups.com>

I have been learning the IDLE Debugger and was wondering if I was
missing something with the "Source" checkbox setting in the debugger.
As I single-step through my program, I have to uncheck and then
recheck this box in order to see the current line in the file editing
window highlighted.  Is there anyway continually see the current line
being executed in the file editor, without unchecking and rechecking
the source setting in the debugger?
Thanks for any insight on this issue.


From giraffeboy at gmail.com  Wed May 21 13:45:18 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 10:45:18 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
Message-ID: <dfc9be28-4b7f-44bc-958e-b48e63052251@x35g2000hsb.googlegroups.com>

On May 21, 3:23 pm, Paul Boddie <p... at boddie.org.uk> wrote:

> Note that if you have a connection open in your program, especially if
> that connection has already been used to select data, it may be the
> case that you then have to perform a rollback or commit before
> attempting to access newly added data. The reason for this behaviour
> is that the DB-API modules will have begun a transaction on your
> behalf, and while that transaction is open, changes committed in other
> transactions may be unavailable to your own transaction, depending on
> the transaction isolation level.

Thanks for that Paul, seems to have solved the problem perfectly. I
had always just thought querying a database would always give you the
most current data, guess it just goes to show that things are never as
simple as they first appear!



From martin at v.loewis.de  Fri May  2 15:44:20 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 21:44:20 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481b6f14$0$9717$9b622d9e@news.freenet.de>

> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
> 
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
> 
> Is there a portable /dev/null somewhere in the standard library?

The subprocess module should work fine. Pass a pipe to the subprocess,
and read and discard anything from the pipe (e.g. in a separate thread).
If the non-Python code is inprocess, you are out of luck. Some systems
just don't support a null device, so Python can't possibly emulate it.

Regards,
Martin


From duncan.booth at invalid.invalid  Wed May  7 06:09:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 10:09:19 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <Xns9A97716C27069duncanbooth@127.0.0.1>

Martin Sand Christensen <msc at es.aau.dk> wrote:

> Now to the main point. When a generator function is run, it 
immediately
> returns a generator, and it does not run any code inside the 
generator.
> Not until generator.next() is called is any code inside the generator
> executed, giving it traditional lazy evaluation semantics. Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?

You mean you expect the semantics of generators to be that when you 
create them, or every time you call next() they run until they hit yield 
and then (except for the initial run) return the result that was yielded 
the time before? It is easy enough to implement that, but could be a bit 
confusing for the user.

>>> def greedy(fn):
    def greedygenerator(*args, **kw):
	def delayed():
		it = iter(fn(*args, **kw))
		try:
			res = it.next()
		except StopIteration:
			yield None
			return
		yield None
		for value in it:
			yield res
			res = value
		yield res
	it = delayed()
	it.next()
	return it
    return greedygenerator

>>> @greedy
def mygen(n):
	for i in range(n):
		print i
		yield i

		
>>> x = mygen(3)
0
>>> list(x)
1
2
[0, 1, 2]
>>> x = mygen(0)
>>> list(x)
[]
>>> 

Now try:

   for command in getCommandsFromUser():
       print "the result of that command was", execute(command)

where getCommandsFromUser is a greedy generator that reads from stdin, 
and see why generators don't work that way.



From basti.wiesner at gmx.net  Fri May 30 18:39:53 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 00:39:53 +0200
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
	<CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>
	<lcudnS3wCdehid3VnZ2dnUVZ_uednZ2d@supernews.com>
Message-ID: <g1pvnp$8vq$02$1@news.t-online.com>

[ Peter Pearson <ppearson at nowhere.invalid> ]

> On Thu, 29 May 2008 20:27:35 -0500, Larry Bates wrote:
>> abhishek wrote:
>>> Hi group, recently my employer asked me too implement encryption/
>>> decryption for secure data transfer over internet. Problem is that the
>>> client application is written using C# and the webserver where i need
>>> to store the information is developed using python.
>>> 
>>> My situation of dilemma is which cryptographic method suits me best
>>> for this purpose.
>>> 
>>> Help/Suggestions are urgently required

> Data security is a complex and difficult problem, and you are likely
> to fail in the worst possible way: implementing something that is
> weak but that you believe to be strong.  Some advice: (1) Use
> off-the-shelf products like PGP or GPG; don't write your own.

full ack.

> (2) Read Bruce Schneier's Applied Cryptography to get a feeling
> for the dimensions of the problem. 

While this book is most certainly worth reading, I doubt, that it is
necessary to gain in-depth knowledge of cryptography to make use of it in
your code.  

If you transfer data over SSL-connection, you should rely on them being
safe, you don't need to understand the details.  You only need to know,
what SSL can protect against, and what it can't protect against.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From vbgunz at gmail.com  Sat May 10 12:42:27 2008
From: vbgunz at gmail.com (vbgunz)
Date: Sat, 10 May 2008 09:42:27 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
Message-ID: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>

I will pay anyone for a face-to-face tutoring in the Orlando Florida
area. I will pay $20.00 per hour (minimum 2 hours needed). What I need
are lessons in Decorators and Class methods. If I can walk away with
at least 5 lessons taught in both subjects I will be happy to offer an
additional $20.00.

If you are interested in this offer feel free to either reply through
email OR here on this thread. There are no string attached, catches,
etc. I need to learn and if you can teach well, I will be happy to
learn.

Best Regards
Victor B. Gonzalez


From pavlovevidence at gmail.com  Thu May  1 20:53:46 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 17:53:46 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
	<071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>
	<fvdl72$3ep$2@news.mtu.ru>
Message-ID: <2209e61f-2799-4c05-a594-31ee6cc54b7e@d1g2000hsg.googlegroups.com>

On May 1, 7:54 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> No, all I want is to give the OP a useful alternative

Fair enough, I can't argue with that.


Carl Banks



From python at hope.cz  Thu May 15 10:16:08 2008
From: python at hope.cz (Johny)
Date: Thu, 15 May 2008 07:16:08 -0700 (PDT)
Subject: Dbase / foxpro files
Message-ID: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>

Is there a module for reading/modifing db files from Python?
Thanks for help
B.


From deets at nospam.web.de  Fri May 23 12:34:49 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 18:34:49 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>
Message-ID: <69oa1aF33cfteU1@mid.uni-berlin.de>

Jimmy schrieb:
> On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
>> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>
>>
>>
>>> Jimmy schrieb:
>>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>>> Jimmy wrote:
>>>>>> Hi to all
>>>>>> python now has grown to a versatile language that can
>>>>>> accomplish tasks for many different purposes. However,
>>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>>> So I am wondering if python can do some kernel coding that
>>>>>> used to be the private garden of C/C++. For example, can python
>>>>>> intercept the input of keyboard on a system level? someone told me
>>>>>> it's a kernel thing, isn't it?
>>>>> http://wiki.python.org/moin/elmer
>>>> well, straightly speaking, how can I know a key is pressed on a system-
>>>> level if
>>>> using python?
>>> What has that todo with kernel programming? You can use e.g. pygame to
>>> get keystrokes. Or under linux, read (if you are root) the keyboard
>>> input file - I've done that to support several keyboards attached to a
>>> machine.
>>> And the original question: no, python can't be used as kernel
>>> programming language. Amongst other reasons, performance & the GIL
>>> prevent that.
>>> Diez
>> sorry, my aim is not limited to one particular program. Yes, many
>> library can
>> permit you to respond to keyboard event, however, what I want is a
>> universal
>> function. as long as a key is pressed, no matter where, my program can
>> repond.
>>
>> I am quite strange with this topic. But according to my understanding,
>> any event, keyboard event
>> for example, once triggered, will be dilivered by keyboard driver to X
>> system, and then
>> any running program can either choose to respond or ignore. So my
>> question can be translated to:
>> how to make my program respond ?
> 
> maybe I'd better elaborate on my question. Back to my original
> question:
> intercept keyboard event on a system level. If you are writing program
> in
>  emacs, of course, the keyboard inputs are meant for emacs only. What
> I
> want is no matter what program you're running, keyboard events can be
> anyway caught by my program.
> 
> Am I clear with myself? :)

Do you want to intercept the call (prevent that it is passed through to 
e.g. emacs), or are you merely interested in getting it? If the latter, 
you can (as root) access the /dev/input keyboard device and get the 
scan-codes.

The former is more complicated - without research I don't know out of my 
head how to accomplish that. But it must be possible, as e.g. KDE 
observes global key-shortcuts. Most probably a X-server thing.



Diez


From andrew.smith.cpp at gmail.com  Tue May 20 06:15:22 2008
From: andrew.smith.cpp at gmail.com (andrew.smith.cpp at gmail.com)
Date: Tue, 20 May 2008 03:15:22 -0700 (PDT)
Subject: Newbie In Python
Message-ID: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>

I have Heard About "Python" its a OOD Language. i have to Learn it
where from i should start it.
i have python compiler at linux Platform.
anyone can suggest me about it.

Thanks In advance.


From james.harris.1 at googlemail.com  Wed May 21 08:33:56 2008
From: james.harris.1 at googlemail.com (James Harris)
Date: Wed, 21 May 2008 05:33:56 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <d42d33e4-9038-4ba7-92cb-2e44cfc61457@m45g2000hsb.googlegroups.com>

On 19 May, 16:18, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.

Can you access the routers with telnet or do you need to use ssh? I've
written loads of Python to access Cisco routers using a wrapper around
the standard telnetlib. Telnetlib supplies an excellent expect
function which makes this work.

It is telnet, though. If I had to use ssh I would probably add it
under the same wrapper so that higher level code could work unchanged.
There may be a way to route the telnet interractions through openssh
or similar externally but I haven't tried that.


From wizzardx at gmail.com  Sat May 24 08:34:36 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 14:34:36 +0200
Subject: Code correctness, and testing strategies
Message-ID: <18c1e6480805240534k1da68fc8rfbace233f0de6e40@mail.gmail.com>

Hi list.

What strategies do you use to ensure correctness of new code?

Specifically, if you've just written 100 new lines of Python code, then:

1) How do you test the new code?
2) How do you ensure that the code will work correctly in the future?

Short version:

For (1) I thoroughly (manually) test code as I write it, before
checking in to version control.

For (2) I code defensively.

Long version:

For (2), I have a lot of error checks, similar to contracts (post &
pre-conditions, invariants). I've read about Python libs which help
formalize this[1][2], but I don't see a great advantage over using
regular ifs and asserts (and a few disadvantages, like additional
complexity). Simple ifs are good enough for Python built-in libs :-)

[1] PEP 316: http://www.python.org/dev/peps/pep-0316/
[2] An implementation:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/436834

An aside: What is the correct situation in which to use assert
statements in Python? I'd like to use them for enforcing 'contracts'
because they're quick to type, but from the docs:

"Assert statements are a convenient way to insert debugging assertions
into a program:"

So to me it sounds like 'assert' statements are only useful while
debugging, and not when an app is live, where you would also
(especially!) want it to enforce contracts. Also, asserts can be
removed with -O, and you only ever get AssertionError, where
ValueError and the like might be more appropriate.

As for point 1 (how do you test the new code?):

I like the idea of automated unit tests. However, in practice I find
they take a long time to write and test, especially if you want to
have good coverage (not just lines, but also possible logic branches).

So instead, I prefer to thoroughly test new code manually, and only
then check in to version control. I feel that if you are disciplined,
then unit tests are mainly useful for:

1) Maintenance of legacy code
2) More than 1 person working on a project

One recent personal example:

My workstation is a Debian Unstable box. I like to upgrade regularly
and try out new library & app versions. Usually this doesn't cause
major problems. One exception is sqlalchemy. It's API seems to change
every few months, causing warnings and breakage in code which used the
old API. This happened regularly enough that for one project I spent a
day adding unit tests for the ORM-using code, and getting the unit
tests up to 100% coverage. These tests should allow me to quickly
catch and fix all sqlalchemy API breakages in my app in the future.
The breakages also make me want to stop using ORM entirely, but it
would take longer to switch to SQL-only code than to keep the unit
tests up to date :-)

My 'test code thoroughly before checkin' methodology is as follows:

1) Add "raise 'UNTESTED'" lines to the top of every function
2) Run the script
3) Look where the script terminated
4) Add print lines just before the exception to check the variable values
5) Re-run and check that the values have expected values.
6) Remove the print and 'raise "UNTESTED"' lines
7) Add liberal 'raise "UNTESTED"' lines to the body of the function.
8.1) For short funcs, before every line (if it seems necessary)
8.2) For longer funcs, before and after each logic entry/exit point
(blocks, exits, returns, throws, etc):

eg, before:

if A():
    B()
    C()
    D()
E()

after:

raise 'UNTESTED'
if A():
    raise 'UNTESTED'
    B()
    C()
    D()
    raise 'UNTESTED'
raise 'UNTESTED'
E()

8.2.1) Later I add "raise 'UNTESTED'" lines before each line in the
blocks also, if it seems necessary.

9) Repeat steps 2 to 8 until the script stops throwing exceptions
10) Check for 'raise "UNTESTED"' lines still in the script
11) Cause those sections of code to be run also (sometimes I need to
temporarily set vars to impossible values inside the script, since the
logic will never run otherwise)

And here is one of my biggest problem with unit tests. How do you unit
test code which almost never runs? The only easy way I can think of is
for the code to have 'if <some almost impossible condition> or <busy
running test case XYZ> lines'. I know I'm meant to make 'fake' testing
classes which return erroneous values, and then pass these objects to
the code being tested. But this can take a long time and even then
isn't guaranteed to reach all your error-handling code.

The above methodology works well for me. It goes fairly quickly, and
is much faster than writing and testing elaborate unit tests.

So finally, my main questions:

1) Are there any obvious problems with my 'correctness' strategies?

2) Should I (regardless of time it takes initially) still be adding
unit tests for everything? I'd like to hear what XP/agile programming
advocates have to say on the subject.

3) Are there easy and fast ways to do write and test (complete) unit tests?

4) Any other comments?

Thanks for your time.

David.


From bbrown at speakeasy.net  Wed May 28 11:14:28 2008
From: bbrown at speakeasy.net (Robert Brown)
Date: Wed, 28 May 2008 11:14:28 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<hoE_j.50548$7a.47091@bignews1.bellsouth.net>
Message-ID: <m2prr631gr.fsf@roger-vivier.bibliotech.com>


"inhahe" <inhahe at gmail.com> writes:
> I like to think of a language that would combine low-level and high-level 
> features to be used at the programmer's whim.  C--, High Level Assembly, and 
> C++ with in-line assembly are examples, but none of them come as high-level 
> as Python. Other possible examples might be ctypes, numpy, array.array, and 
> I heard a rumor that Python 3.0 might have optional type declarations.   My 
> ideal language would be like a version of C++ (including in-line asm), or 
> C-- with classes, that's compiled, but supports Python abstractions and 
> features wherever possible (including doing away with {}'s and ;'s).

Maybe you should give Common Lisp a try.  It combines the high-level
features you enjoy in Python with features like optional type declarations,
which can be used to create high-performance code.  You will also have fun
playing around with syntactic abstraction (macros) to define very high-level
domain specific languages.


From sturlamolden at yahoo.no  Sun May 25 22:15:18 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 25 May 2008 19:15:18 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4839A607.7070300@behnel.de>
	<mailman.1576.1211741113.12834.python-list@python.org>
Message-ID: <d1e7f23b-f68c-42cf-9d12-66220a095448@m36g2000hse.googlegroups.com>

On May 25, 8:02 pm, Rodrigo Lazo <rlazo.... at gmail.com> wrote:

> what about heapq for sorting?

Heap is the data structure to use for 'fast (nearly) sorted inserts'.
But heapq do not support (as far as I know) deletion of duplicates.
But a custom heap class coud do that of course.



From pistacchio at gmail.com  Tue May 13 09:36:48 2008
From: pistacchio at gmail.com (pistacchio)
Date: Tue, 13 May 2008 06:36:48 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com> 
	<VuTVj.40306$o06.27577@tornado.fastwebnet.it>
	<9af51496-5840-4f53-ae71-0d9c0da6c2f4@34g2000hsh.googlegroups.com>
Message-ID: <598d5d96-4c4a-4f0e-b9f0-a2726ab3e63a@d77g2000hsb.googlegroups.com>

On 12 Mag, 11:11, pistacchio <pistacc... at gmail.com> wrote:
> On 12 Mag, 10:47, Marco Mariani <ma... at sferacarta.com> wrote:
>
> >pistacchiowrote:
> > > On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> > >> On May 12, 5:17 pm,pistacchio<pistacc... at gmail.com> wrote:
>
> > >>> hi to all!
> > >>> can i load a module passing to it, automatically and as default, all
> > >>> the caller's global variables to act as module's global variables?
>
> > Are you positively sure you need this?
>
> > Modifying imported modules is already quite fragile, but this.. it's
> > basically a reversed(import *)
>
> > It's quite messy. Where quite equals to "very"
>
> well, i'm writing a module called pycatrix. within the module i have
> compile / exec statements in a functions that work on global
> variables. ( exec compiledTemplate in globals() ).
>
> now, i don't want to be forced (or force the end user) to import to
> call the module's function with a compulsory "globals()" as argument.

up


From 65563082 at qq.com  Mon May 12 11:03:04 2008
From: 65563082 at qq.com (www.globwholesale.com)
Date: Mon, 12 May 2008 08:03:04 -0700 (PDT)
Subject: Discount, Chanel Prada Coach Women's Sandals, LV D&G Fendi Versace 
	Sunglasses
Message-ID: <1b4c5e62-4633-48e1-91d6-e65ae5b00fc1@q27g2000prf.googlegroups.com>

Discount Coach Sandals, Dior Sandals, Prada  Sandals, Chanel Sandals,
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From nik600 at gmail.com  Mon May 26 11:36:44 2008
From: nik600 at gmail.com (nik600)
Date: Mon, 26 May 2008 17:36:44 +0200
Subject: integration with browser
In-Reply-To: <69vmlgF35akucU1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
Message-ID: <9469c3170805260836m32e35e70w329259e3a0563b36@mail.gmail.com>

Both win and linux if possible i don't have preference for gui. Thanks

2008/5/26, Diez B. Roggisch <deets at nospam.web.de>:
> nik600 wrote:
>
>> Hi to all
>>
>> i'd like to create a window that integrates a browser control, the
>> browser control must support html, javascript and css.
>>
>> Is possible to include something that uses the same engine of firefox?
>>
>> Thanks to all in advance
>
> What OS, what GUI toolkit?
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From arnodel at googlemail.com  Wed May 14 13:45:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 18:45:11 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
Message-ID: <m21w44bx08.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>> > An instance method works on the instance
>> > A Static method is basically a function nested within a class object
>> > A class method is overkill?
>>
>> If anything, a static method is overkill. See it this way: *if* you for some
>> reason put a method into an enclosing context - isn't it worth having a
>> reference to that?
>
> My feeling exactly; these days I almost always use class methods
> instead of static. I vaguely remember seeing somewhere an example
> where a static method was the only (elegant) solution; neither a class
> method nor a plain function would do. I'll post it if I find it unless
> someone beats me to it.
>
> George

__new__ is a static method!

-- 
Arnaud


From gagsl-py2 at yahoo.com.ar  Mon May 12 02:39:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:39:47 -0300
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<Xns9A90773D0D544duncanbooth@127.0.0.1>
	<4820319a_7@news.bluewin.ch>
	<8f1293e5-26f7-4183-acd4-47fd6eda931a@l42g2000hsc.googlegroups.com>
Message-ID: <op.ua03glt3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 06 May 2008 08:16:55 -0300, <cokofreedom at gmail.com> escribi?:

> I tend to do ", ".join("%s" % e for e in item)
>
> Is there any difference between this and str()?

Use the timeit module to measure performance:

C:\TEMP>python -m timeit "for i in xrange(10000): str(i)"
10 loops, best of 3: 81.8 msec per loop

C:\TEMP>python -m timeit "for i in xrange(10000): '%s' % i"
10 loops, best of 3: 78.5 msec per loop

The %s version consistently wins in my system -2.5.1 on WinXP- for a wide range of inputs.

-- 
Gabriel Genellina



From inhahe at gmail.com  Tue May 27 01:28:38 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 27 May 2008 01:28:38 -0400
Subject: Hungarian Notation
Message-ID: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>

Does anybody know of a list for canonical prefixes to use for hungarian 
notation in Python?  Not that I plan to name all my variables with hungarian 
notation, but just for when it's appropriate.





From kyosohma at gmail.com  Thu May  1 17:31:58 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 14:31:58 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <3832bd90-c219-4bc8-b16b-0c5e0318c83b@f63g2000hsf.googlegroups.com>

On May 1, 4:25?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> I have been to the main python site, but am still confused. ?I have
> been using .net, so it may be obvious how to do this to everyone
> else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these. ?If I
> have mod_python or fastcgi on apache, where do I start? ?I don't have
> clue where to begin to create a web page from scratch in python. ?I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.
>
> Thank you for any help.

The web frameworks make it a lot easier. But you can use the httplib
modules. You should check out the wiki: http://wiki.python.org/moin/WebProgramming

There's also a couple of books on the topic: "Python Web Programming"
by Steve Holden, and "Web Programming in Python" by Thiruvathukal.

Check out the cgi-type stuff especially.

Hope that helps some.

Mike


From mmanns at gmx.net  Sun May 25 19:55:03 2008
From: mmanns at gmx.net (Martin Manns)
Date: Mon, 26 May 2008 01:55:03 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
	<83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>
	<59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>
Message-ID: <g1cu8n$5g4$1@aioe.org>

On Sun, 25 May 2008 14:39:28 -0700 (PDT)
bearophileHUGS at lycos.com wrote:

> This may have some bugs left, but it looks a bit better:
[...]
>         self._hash = hash(self._func.func_code) ^ \
>                      hash(tuple(signature[0]) + tuple(signature[1:3]))
>     def __eq__(self, other):
>         return self._func.func_code == other._func.func_code and \
>                getargspec(self._func) == getargspec(other._func)
>     def __hash__(self):
>         return self._hash
>     def __call__(self, *args, **kwargs):
>         return self._func(*args, **kwargs)
> 
> I haven't put a full hashing of getargspec(self._func) too into the
> __init__() because it may contain too much nested unhashable
> structures, but the __eq__() is able to tell them apart anyway, with
> some collisions.

Looking at a function:

>>> a=lambda x:x
>>> dir(a)
['__call__', '__class__', '__delattr__', '__dict__', '__doc__',
'__get__', '__getattribute__', '__hash__', '__init__', '__module__',
'__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',
'__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults',
'func_dict', 'func_doc', 'func_globals', 'func_name']

Should func_globals and func_name also be taken into account for
__eq__()?

Best Regards

Martin


From kyosohma at gmail.com  Tue May 13 14:56:23 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 11:56:23 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com> 
	<6bb0ca79-1070-4d42-90a9-a1066b152210@d1g2000hsg.googlegroups.com>
Message-ID: <ecf9f449-f019-4b76-8d09-56c17d8dddd7@c58g2000hsc.googlegroups.com>

On May 13, 1:47?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 13, 1:44 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
> > On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>
> > > Does anyone know of any (preferably largish) examples of literate
> > > programs written using Python? ?Alternatively, does anyone know of any
> > > literate programming tools which support Python well? ?(I am aware of
> > > Leo and I've been to literateprogramming.com, but any additional
> > > pointers would be much appreciated!)
>
> > Check out Zope, bittorrent, or Editra. You should just go to
> > SourceForge and do a search for projects done in Python.
>
> Those aren't examples of literate programming AFAIK. ?(Check Wikipedia
> for "literate programming" if you're still confused.)
>
> It occurs to me that one could get pretty close to literate
> programming with Pure Python (if they stick to regular function calls
> and not expect code weaving, which would need a preprocessor). ?A
> fairly simple script could ?parse docstrings and Python source files
> to produce a document from the source. ?In fact, there are tools that
> can do that sort of thing already, but I doubt they output documents
> according to literate programming expectations. ?Don't know of any
> tools specifically for literate programming.
>
> Carl Banks

Sorry...I took the OP's meaning literally...

Mike


From daveparker at flamingthunder.com  Tue May 13 09:32:11 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:32:11 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
Message-ID: <dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>

> Don't let yourself be irritated by castironpi

I'm not the sort to get irritated by anyone.  There is value in all
interaction.  Flaming Thunder is itself the averaging of interactions
with many computer languages and conversations with many people, so as
to create a language that allows people to tell a computer what they
want it to do, without having to know very much about how the computer
does it.

On May 13, 3:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Dave Parker wrote:
> > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> >>Yes, I am trying to visualize something.
>
> > If it is related to making furniture comfortable for humans, have you
> > considered painting the furniture with thermochromic paint (
> >http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> > response to temperature, which in part is determined by how hard a
> > body is pressed against it because close contact tends to trap heat.
> > An evenly distributed color might indicated evenly distributed
> > pressure.
>
> Don't let yourself be irritated by castironpi - he's the virtual equivalent
> of a mumbling mad man in this group. Ignorance serves best as remedy - and
> getting a filter to work, as I did (so I only see his postings being
> quoted... a huge relief!)
>
> Diez



From gagsl-py2 at yahoo.com.ar  Sun May 25 13:53:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 14:53:57 -0300
Subject: raising an exception when multiple inheritance involves same
	baseThank
References: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <op.ubp1b7xox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 13:32:39 -0300, Paul McGuire <ptmcg at austin.rr.com> escribi?:

> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
>
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

I think you should exclude the `object` class from the test, because all new-style classes inherit from it and *every* case of multiple inheritance forms a diamond.

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Sat May 24 21:15:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 24 May 2008 18:15:39 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <be2b1f12-7392-48c9-85a7-2e961940f42a@d45g2000hsc.googlegroups.com>

On May 24, 7:12 am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Carl Banks schrieb:
>
> > p = myfunction()
> > if p:
> >     print p
>
> > (I recommend doing it this way in C, too.)
>
> This is okay for if-clauses, but sucks for while-loops:
>
> while (fgets(buf, sizeof(buf), f)) {
>         printf("%s\n", buf);
>
> }


In earlier times, the Python idiom was this:

while True:
    line = f.readline()
    if not line:
        break
    print line

Not the prettiest thing ever, but it works fine, is readable, and
avoids a temporary variable.  In C, given the choice between this or
using assignment expression, I'd say use either one.  (But don't use
the version with a temporary, that's ugly as hell.)

More recent versions of Python have obviated the need to use this
idiom by making it possible to iterate over the lines of a file
directly.  First they added xreadlines:

for line in xreadlines(f):
    print line

Then they deprecated the xreadline function and made it a method:

for line in f.xreadlines():
    print line

Then they recommended you no longer use that, and just made file
objects directly iterable:

for line in f:
    print line

The point is, the Python language developers do share your concern
about these things.  However, they still think assignment epxressions
are a very bad idea, so they've sought other solutions to these
issues.

(But, as I said, they have yet to provide an alternative for elif
clauses; you're stuck with workarounds there.)


Carl Banks


From rocky at panix.com  Wed May 14 23:31:04 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 14 May 2008 23:31:04 -0400
Subject: Running an interactive interpreter inside a python
Message-ID: <wihy76c2qh3.fsf@panix5.panix.com>

The next release of pydb will have the ability to go into ipython from
inside the debugger. Sort of like how in ruby-debug you can go into
irb :-)

For ipython, this can be done pretty simply; there is an IPShellEmbed
method which returns something you can call. But how could one do the
same for the stock python interactive shell?

To take this out of the realm of debugging. What you want to do is to
write a python program that goes into the python interactive shell -
without having to write your own a read/eval loop and deal with
readline, continuation lines, etc.

The solution should also allow
 - variables/methods in the calling PYthon program to be visible
   in the shell
 - variables set in the interactive (sub) shell should persist after the shell 
   terminates, although this is a weaker requirement. POSIX subshells
   for example *don't* work this way.

There has been much written about how to embed Python from C, so I
suppose this may offer one way. And at worst, I could write
a C extension which follows how C Python does this for itself.

But is there a simpler way?

Thanks.





From arnodel at googlemail.com  Tue May 20 05:19:20 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 10:19:20 +0100
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <m23aod8h9j.fsf@googlemail.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
>
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
>
> Thanks.

Out of the blue idea which is probably rubbish:

Create a tree of your words, look at it as a Deterministic Finite
Automaton (DFA), minimise it, you get what some call a DAWG. That
works very well with lots of small words.

e.g.

Words aabc, babc, bbbc.

Minimal DFA:

1 -a-> 2 -a-> 4 -b-> 5 -c-> 6
\             ^
 b-> 3 -a-----+
      \      /
       b----+


To compress a word, simply find its position in alphabetical order,
call that its 'path'.

The 'decompression algorithm' is then (in pseudo-python)

def decompress(DFA, path):
    letters = []
    state = DFA.initial_state
    while not state.is_final():
        transitions = state.transitions
        path, choice = divmod(path, len(transitions))
        state = transitions[choice].new_state
        letters.append(transitions[choice].letter)

I'm not too sure about this :)

-- 
Arnaud


From wizzardx at gmail.com  Sat May 24 15:14:36 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 21:14:36 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <g19fv3$3vl$1@gide.ita.chalmers.se>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
Message-ID: <18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>

Hi again list.

>
> As you come up with the corner case, write a test for it and leave the implementation
> for later. The hard part of coding is always defining your problem. Once it is
> defined (by a test) the solution is just a matter of tidy work.
>

Is it considered to be cheating if you make a test case which always
fails with a "TODO: Make a proper test case" message?

While it is possible to describe all problems in docs, it can be very
hard to write actual test code.

For example: sanity tests. Functions can have tests for situations
that can never occur, or are very hard to reproduce. How do you unit
test for those?

A few examples off the top of my head:

* Code which checks for hardware defects (pentium floating point,
memory or disk errors, etc).

* Code that checks that a file is less than 1 TB large (but you only
have 320 GB harddrives in your testing environment).

* Code which checks if the machine was rebooted over a year ago.

And so on. These I would manually test by temporarily changing
variables in the code, then changing them back. To unit test these you
would need to write mock functions and arrange for the tested code to
call them instead of the python built-ins.

Also, there are places where mock objects can't be used that easily.

eg 1: A complicated function, which needs to check the consistency of
it's local variables at various points.

It *is* possible to unit test those consistency checks, but you may
have to do a lot of re-organization to enable unit testing.

In other cases it might not be appropriate to unit test, because it
makes your tests brittle (as mentioned by another poster).

eg: You call function MyFunc with argument X, and expect to get result Y.

MyFunc calls __private_func1, and __private_func2.

You can check in your unit test that MyFunc returns result Y, but you
shouldn't check __private_func1 and __private_func2 directly, even if
they really should be tested (maybe they sometimes have unwanted side
effects unrelated to MyFunc's return value).

eg: Resource usage.

How do you unit test how much memory, cpu, temporary disk space, etc a
function uses?

eg: Platforms for which unit tests are hard to setup/run.

 - embedded programming. You would need to load your test harness into
the device, and watch LED patterns or feedback over serial. Assuming
it has enough memory and resources :-)
 - mobile devices (probably the same issues as above)

eg: race conditions in multithreaded code: You can't unit test
effectively for these.

And so on.

>
> Agreed. There is no good way of reusing your prototype code in TDD. You end
> up having to throw your propotype away in order to have a proper tested
> implementation in the end. Takes more time up front, but less time over the
> lifecycle of the program you are building.
>

Sounds like you are talking about cases where you have to throw away
the prototype *because* you couldn't unit test it properly? (but it
was otherwise functioning perfectly well).

>>Problem 3: Slows down development in general
>>
>>Having to write tests for all code takes time. Instead of eg: 10 hours
>>coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>>writing all the tests, and 10 on the code.
>
> This is incorrect. It speeds up development in general. The debugging phase of
> development becomes much shorter because the bugs are fewer and the ones you
> have a much shallower. There are so many tests that reduce the scope in which
> you have to search for the bug that it usually becomes trivial to find.

Depends on the type of bug. If it's a bug which breaks the unit tests,
then it can be found quickly. Unit tests won't help with bugs they
don't explicitly cover. eg off-by-one, memory leaks, CPU load,
side-effects (outside what the unit tests test), and so on.

That's another reason why I don't think that unit tests are a silver
bullet. You can have code that's totally wrong, but still succeeds in
the tests (even if they're very detailed). eg: hardcoding return
values expected by the tests, and returning garbage the rest of the
time.

But once you track down problems like the above you can write more
unit tests to catch those exact bugs in the future. This is one case
where I do favour unit tests.

I guess you could compare unit tests to blacklists or anitivirus
software. All of them only catch cases that have been explicitely
coded into them.

>
> I have direct experience from this, getting my company to change to TDD about
> 10 months ago. Productivity has improved enormously. I'd say that we have cut
> between 25 and 50% in development time.
>

Going by your figures and other cases I've read on the web, there are
definitely cases where TDD is beneficial and can save a lot of time.
What I'm not sure of (probably inexperience on my part) is when you
should and shouldn't use TDD, and to what extent.

I'm sure that factors like this have to come in to play when deciding
if and how to use TDD in a given project:

- size and age of the project (new, small code is easier to understand
than large, old)
- complexity & modularity of project
- programming language used (dynamic langs need unit tests more than compiled)
- importance of project (consequences of bugs)
- who the project is for (yourself, inhouse, or for client)
- how easy it is to fix problems in deployed software
- number of developers
- skill & discipline of developers
- development style (waterfall/incremental, etc)
- consistency checks already built into the software

That last one (internal consistency checks) is a big one for me. If
software has a lot of internal consistency checks (contracts), then I
feel that the need for unit tests is a lot less.

>>Problem 4: Can make refactoring difficult.
>>
>>If you have very complete & detailed tests for your project, but one
>>day you need to change the logic fundamentally (maybe change it from
>>single-threaded to multi-threaded, or from running on 1 server to
>>distributed), then you need to do a large amount of test refactoring
>>also. The more tests you have (usually a good thing), the longer it
>>will take to update all the tests, write new ones, etc. It's worse if
>>you have to do all this first before you can start updating the code.
>
> No, this is a total misunderstanding. It makes refactoring much easier.
> It takes a bit of time to refactor the affected tests for the module, but you
> gain so much by having tests that show that your refactoring is not breaking
> code that should be unaffected that it saves the extra time spent many times
> over.
>

Makes refactoring easier how?

I assume you mean the unchanged tests, which check functionality which
should be the same before and after your refactoring. All the other
tests need to be replaced. I agree that the unchanged tests can be
helpful. It's the extra work of unit test maintenance I have a problem
with.

In an extreme case you might refactor the same code multiple times,
requiring the test cases to also be refactored each time too (more
test cases = more work each time). To me it feels like the test cases
can be a lot of 'dead weight', slowing down development.

Even if you want unit tests for the final version which goes to the
customer, you still had to spend time with re-writing unit tests for
all the refactored versions inbetween. To me those intermediate unit
test versions sound like a complete waste of time. Please correct me
if this is also mistaken :-)

> Introducing bugs because you missed some aspect in a refactoring is one of the
> most common problems in non-TDD code and it is a really nasty quality
> concern.

I agree here. But I feel that you can get the same quality by good QA
and human testing (ie: developer does a lot of testing, then hands it
over to testers, then it goes to the customer). Which should be done
whether or not you have unit tests. I feel that unit tests are mainly
good for catching rare cases which might not be tested by a human.

In other words, full-on TDD only becomes really useful when projects
grow large (and complicated) and can't be fully tested by humans?
Until that point, only using unit tests to catch regressions seems to
be more than enough to ensure good quality. (Again, correct me if this
is mistaken).

>>
>>Problem 5: Tests are more important than code
>>
>>You need to justify the extra time spent on writing test code. Tests
>>are nice, and good to have for code maintainability, but they aren't
>>an essential feature (unless you're writing critical software for life
>>support, etc). Clients, deadlines, etc require actual software, not
>>tests for software (that couldn't be completed on time because you
>>spent too much time writing tests first ;-)).
>>
> The tests are as important as the code. As a customer, I don't think I'd buy
> software today unless I know that it has been built using TDD. Certainly I am
> ahead of the curve in this, but it won't be long before this will be required
> by skilled organisations buying software and sooner or later the rest of the
> world will follow.

How much software is written with TDD? Do companies generally
advertise this? I get the idea that most high quality open source
software (Apache, linux kernel, GNU, Python, etc) are developed in a
non-TDD way. What they do have is intelligent developers, coding
conventions,  and a very good testing & QA process. Where they do have
unit tests it's usually for regressions. Why don't they use TDD if it
would make such a big difference? Are you going to stop using open
source software (like Python) which isn't written with TDD?

>
> Getting into a TDD mindset is hard work, but those who succeed produce better
> software with less effort.
>

Thanks for your informative reply. I've learned a bit from this thread
and will definitely look more into TDD :-)

David.


From brad at 16systems.com  Thu May 22 18:20:12 2008
From: brad at 16systems.com (Brad)
Date: Thu, 22 May 2008 18:20:12 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <g14rk0$4pf$1@solaris.cc.vt.edu>

cm_gui wrote:
> Python is slow.

It ain't C++, but it ain't a punch card either... somewhere in between. 
I find it suitable for lots of stuff. I use C++ when performance really 
matters tho... right tool for the job. Learn a good interpreted language 
(Pyhton) and a good compiled language (C or C++) and you'll be just 
fine. Until then, quit bitching.


From mcknight0219 at gmail.com  Fri May 23 14:32:26 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 11:32:26 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com> 
	<69oa1aF33cfteU1@mid.uni-berlin.de>
Message-ID: <2826a237-a4e7-4aa5-a015-de00ef4ed642@w1g2000prd.googlegroups.com>

On May 24, 12:34 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jimmy schrieb:
>
>
>
> > On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
> >> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> >>> Jimmy schrieb:
> >>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> >>>>> Jimmy wrote:
> >>>>>> Hi to all
> >>>>>> python now has grown to a versatile language that can
> >>>>>> accomplish tasks for many different purposes. However,
> >>>>>> AFAIK, little is known about its ability of kernel coding.
> >>>>>> So I am wondering if python can do some kernel coding that
> >>>>>> used to be the private garden of C/C++. For example, can python
> >>>>>> intercept the input of keyboard on a system level? someone told me
> >>>>>> it's a kernel thing, isn't it?
> >>>>>http://wiki.python.org/moin/elmer
> >>>> well, straightly speaking, how can I know a key is pressed on a system-
> >>>> level if
> >>>> using python?
> >>> What has that todo with kernel programming? You can use e.g. pygame to
> >>> get keystrokes. Or under linux, read (if you are root) the keyboard
> >>> input file - I've done that to support several keyboards attached to a
> >>> machine.
> >>> And the original question: no, python can't be used as kernel
> >>> programming language. Amongst other reasons, performance & the GIL
> >>> prevent that.
> >>> Diez
> >> sorry, my aim is not limited to one particular program. Yes, many
> >> library can
> >> permit you to respond to keyboard event, however, what I want is a
> >> universal
> >> function. as long as a key is pressed, no matter where, my program can
> >> repond.
>
> >> I am quite strange with this topic. But according to my understanding,
> >> any event, keyboard event
> >> for example, once triggered, will be dilivered by keyboard driver to X
> >> system, and then
> >> any running program can either choose to respond or ignore. So my
> >> question can be translated to:
> >> how to make my program respond ?
>
> > maybe I'd better elaborate on my question. Back to my original
> > question:
> > intercept keyboard event on a system level. If you are writing program
> > in
> >  emacs, of course, the keyboard inputs are meant for emacs only. What
> > I
> > want is no matter what program you're running, keyboard events can be
> > anyway caught by my program.
>
> > Am I clear with myself? :)
>
> Do you want to intercept the call (prevent that it is passed through to
> e.g. emacs), or are you merely interested in getting it? If the latter,
> you can (as root) access the /dev/input keyboard device and get the
> scan-codes.
>
> The former is more complicated - without research I don't know out of my
> head how to accomplish that. But it must be possible, as e.g. KDE
> observes global key-shortcuts. Most probably a X-server thing.
>
> Diez

thanks, right now I am content with just knowing a key is pressed.
as you said, I checked /etc/input/event1 which seems the input of
keyboard. Then I got some extremely strange code. however, how can
I just simply know a key is pressed?


From timr at probo.com  Tue May 20 00:14:04 2008
From: timr at probo.com (Tim Roberts)
Date: Tue, 20 May 2008 04:14:04 GMT
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>

Monica Leko <monica.leko at gmail.com> wrote:
>
>I have a specific format and I need binary representation.  Does
>Python have some built-in function which will, for instance, represent
>number 15 in exactly 10 bits?

For the record, I'd like to point out that even C cannot do this.  You need
to use shifting and masking to produce a stream of 8-bit bytes, or to
extract your values from a stream of 8-bit bytes.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py2 at yahoo.com.ar  Mon May 19 20:16:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 21:16:51 -0300
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>
	<7xtzgtyjtx.fsf@ruckus.brouhaha.com>
Message-ID: <op.ubfe2dsfx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 20:07:06 -0300, Paul Rubin  
<"http://phr.cx"@NOSPAM.invalid> escribi?:
> blaine <frikker at gmail.com> writes:

>> How is it that you recommend killing a pure python thread?

Make the thread cooperate. It should periodically check some variable or  
condition, and cleanly exit when requested.

>> And also,
>> when i use the 'threading' module am I creating a process, or a (gasp)
>> thread?
>
> A thread.
>
>> (Is this an obvious question - and if so, how does one create
>> a 'process'?)
>
> os.fork()

A more portable answer: using the subprocess module.

-- 
Gabriel Genellina



From yves at zioup.com  Sun May 11 18:51:09 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Sun, 11 May 2008 22:51:09 GMT
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <48275446$0$11628$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <xLKVj.132782$rd2.122246@pd7urf3no>

John Salerno wrote:
> 
> To me, the first example is a pure use of the for loop. You are 
> iterating through an object and *using* the items you are stepping through.
> 
> The second example, however, is simply doing something 10 times, and 
> what it's doing has nothing to do with 'x' or xrange. So it seems like 
> an abuse of the for loop.

Well, I would say this:
myl = ['a', 'b', 'c', 'd']
for i in xrange(len(myl)):
   print myl[i]

As you would see in other languages, is an abuse in python. But in you need 
to iterate 5 times over something. Do you have a cleaner / python'er 
alternative ?

Do you find the following cleaner:

x = 0
while x <= 4:
   print x
   x += 1



Yves.
http://www.SollerS.ca


From collinyeung at shaw.ca  Wed May 21 21:06:06 2008
From: collinyeung at shaw.ca (Collin)
Date: Thu, 22 May 2008 01:06:06 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <2G3Zj.285812$pM4.26927@pd7urf1no>

Dave Parker wrote:
> On May 20, 7:05 pm, Collin <collinye... at shaw.ca> wrote:
> 
>> Personally, FT is a bit meh to me. The way you issue your statements I
>> always think something is wrong, mainly because when I want to define,
>> say, x, in python I'd go:
>>
>> x = "whatever"
>>
>> Instantly noting that I defined x. While in Flaming Thunder I'd have to
>> type:
>>
>> Set x to "whatever"
>>
>> It just feels wrong.
> 
> Actually, it felt wrong to me when I first started working on Flaming
> Thunder because I've been programming for decades and have had all of
> the programming idioms burned into my brain.
> 
> But after getting input from children and teachers, etc, it started
> feeling right.
> 
> For example, consider the two statements:
> 
>      x = 8
>      x = 10
> 
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".
> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).
> 
> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.
> 
> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:
> 
>      Set x to 8.
> 
> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:
> 
> Set QuadraticEquation to a*x^2 + b*x + c = 0.


Then I guess the elementary school kids will use your FT system while we 
  will use our naturally burned-in sense of syntax from other 
programming languages, eh?

Not saying this as a negative or anything, I'm just saying that most of 
us have a habit, and it's not necessarily a bad nor good habit, of doing 
things the way most languages have them done. For example, x = 8 is 
extremely readable, to, I assume, most of us. Set x to 8, it takes some 
time getting used to. Why should we switch to a language that will take 
us time to get used and some more time to understand syntax when we 
already understand and can efficiently use our current languages?

It's like going to the middle of London and screaming: "HEY GUYS GUESS 
WHAT! I JUST INVENTED A NEW LANGUAGE AND IT'S VERY VERY EASY TO LEARN!" 
And the people who would try the language would find the way you do 
everything is very different from English, or their native language, for 
that matter. Best let sleeping dogs lie.

Collin


From jcd at sdf.lonestar.org  Sun May 18 14:13:57 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sun, 18 May 2008 14:13:57 -0400
Subject: [jcd@sdf.lonestar.org: Re: Compress a string]
Message-ID: <20080518181357.GB14680@sdf.lonestar.org>

On Sun, May 18, 2008 at 07:06:10PM +0100, Matt Porter wrote regarding Compress a string:
> 
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
> 
> The code I have so far feels like it could be made clearer and more  
> succinct, but a solution is currently escaping me.
> 
> 
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
> 
> 
> Cheers
> Matt

def compress_str(s): 
    # str is a builtin keyword. Don't overload it.
	out = []
	for c in s:
		if out and c == out[-1]:
			out.append(c) # This is faster than new_str += c
	return ''.join(out) 




From inhahe at gmail.com  Sun May 18 06:44:04 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:44:04 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<SATXj.11281$hv2.7858@bignews5.bellsouth.net>
Message-ID: <SKTXj.11287$hv2.8935@bignews5.bellsouth.net>


> My ideal language would be a natively compiling cross between C++ and
> Python.  Objects declared with a type would be statically typed, objects 
> not declared with a type would be dynamically typed.  There would also be 
> keywords to declare that class names won't be reassigned and class 
> attributes won't be deleted.  Those attributes would be referred to by 
> offset, not hash table keys.


But those attributes would also exist in the hash table because the referer 
can also use a dynamically created name.




From deets at nospam.web.de  Tue May 13 13:26:43 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 19:26:43 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
Message-ID: <68u1avF2ujou9U1@mid.uni-berlin.de>

Dave Parker schrieb:
>> Who has conducted the research that supports that statement? And since when
>> is ^ the better operator for "to the power of" that **? Because latex uses
>> it? I need to see the elementary school students who use that...
> 
> All of the calculators and textbooks that elementary school students
> use, use "^" for powers.  Just like Flaming Thunder does.  I haven't
> seen "**" for powers since FORTRAN.

I haven't seen a power operator in elementary school at all. And even 
*if* I did see it, it would have been in the raised-text-variant, *not* 
the caret that is a crutch.

Diez


From tamim.shahriar at gmail.com  Mon May 19 01:27:24 2008
From: tamim.shahriar at gmail.com (subeen)
Date: Sun, 18 May 2008 22:27:24 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<mailman.1326.1211162009.12834.python-list@python.org>
Message-ID: <9dd32e12-9f4e-49f9-b2eb-cc8c58a60e85@z16g2000prn.googlegroups.com>

On May 19, 7:52 am, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Mon, 19 May 2008 08:20:22 +1000, John Salerno
>
> <johnj... at NOSPAMgmail.com> wrote:
> > Hey all. Just thought I'd ask a general question for my own interest.
> > Every time I think of something I might do in Python, it usually
> > involves creating a GUI interface, so I was wondering what kind of work
> > you all do with Python that does *not* involve any GUI work. This could
> > be any little scripts you write for your own benefit, or what you do at
> > work, if you feel like talking about that! :)
>
> > Thanks.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> - Enhancing existing products by scripting new features.
> - Interface between databases, Excel and text files.
> - Convert data between flat files and XML.
> - Manage files for build processes.
> - Automating processes (e.g. checkout, builds, FTP).
>
> Wish I had some reasons to make a GUI application in Python.
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I also haven't used GUI in python yet. I basically write web crawlers/
spiders in Python where GUI is not essential.

regards,
Subeen
http://love-python.blogspot.com/


From rolf.oltmans at gmail.com  Fri May  2 14:51:42 2008
From: rolf.oltmans at gmail.com (Oltmans)
Date: Fri, 2 May 2008 11:51:42 -0700 (PDT)
Subject: Searching and replacing text ?
Message-ID: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>

Hi,

I'm new to Python (and admittedly not a very good programmer) and I've
come across a scenario where I've to search and replace text in a
file.

For the sake of an example, I'm searching for every occurence of the
text
[[http://www.hotmail.com -> Hotmail]]

I've to replace it with
[http://www.hotmail.com Hotmail]

I've come up with following scheme
p=re.compile(r'\[\[')
q=re.compile(r'->')

p.sub('[',txt)
q.sub('\b',txt)

Give that I don't have very strong RegEX background, this doesn't look
very elegant. Is there some other way I can accomplish the same thing?
Moreover, please note that I'm using 'p' and 'q' for two regex and
then calling 'sub()' on both p and q. Can't I just do that by
employing one RegEx and then calling sub() only once?

Please enlighten me. Thanks in advance.



From kyosohma at gmail.com  Tue May 27 12:25:34 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 09:25:34 -0700 (PDT)
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org>
Message-ID: <871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>

On May 27, 10:34?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> ? ? ? ? ? ? def str2datetime(s):
> ? ? ? ? ? ? ? ? #28 May 2008 12:38:16 BDT
> ? ? ? ? ? ? ? ? return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
>
> ? ? ? ? ? ? #.... some code here....
> ? ? ? ? ? ? print repr(pd)
> ? ? ? ? ? ? print str2datetime(pd)
>
> Result:
>
> '24 May 2008 12:38:16 BDT'
> Traceback (most recent call last):
> ? File "__init__.py", line 40, in <module>
> ? ? print ssc.get_order_data('202-9810306-3236320')
> ? File
> "/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py",
> line 306, in get_order_data
> ? ? print str2datetime(pd)
> ? File
> "/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py",
> line 299, in str2datetime
> ? ? return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
> ? File "/usr/local/lib/python2.5/_strptime.py", line 331, in strptime
> ? ? (data_string, format))
> ValueError: time data did not match format: ?data=24 May 2008 12:38:16
> BDT ?fmt=%d %b %Y %H:%M:%S %Z
>
> I think that the format is correct. What am I doing wrong?
>
> Thanks,
>
> ? ?Laszlo


I tried taking out components until I got it to work. It seems to be
choking on the time zone part of it. If you remove the "BDT" from your
string and the "%Z" from your formatter, it works. Unfortunately, I do
not know why it doesn't work the other way.

Mike


From python at bdurham.com  Tue May  6 17:43:16 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 17:43:16 -0400
Subject: Generate labels for a multi-level outline
Message-ID: <1210110196.17982.1251761433@webmail.messagingengine.com>

I need to generate multi-level incrementing labels for an
outline/hierarchy where the string for each level of a label is based on
an incrementing sequence like 1, 2, 3 or A, B, C, or even I, II, III.
For simplicity, assume that each level's label segment is separated by a
period (".").

I will pass an integer level (1 ... N) to this function/object so that
level specific counters get reset when the level changes.

I will use this function/object to generate output like:

Label     Level
I.        1
I.A.      2
I.B.      2
I.C.      2
I.D.      2
I.D.1.    3
I.D.2.    3
I.D.3.    3
I.E.      2
II.       1

Is there a pre-built class for generating label sequences like this?
(I'm not sure what I would use as search terms to google for such a
class).

While this sounds like a simple/fun class to write, I think it could
quickly get complicated when one factors in parsing rules for each
level's label type, separators, and error checking. If there's an
existing, road tested class (with unit tests) that does this, I would
rather avoid re-inventing/re-testing the wheel.

Thanks,
Malcolm


From kamhung.soh at gmail.com  Thu May 15 00:37:49 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 15 May 2008 14:37:49 +1000
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
	<NkNWj.138991$Cj7.33283@pd7urf2no>
Message-ID: <op.ua6htbbbev04yd@melwxp23>

On Thu, 15 May 2008 12:36:29 +1000, Collin <collinyeung at shaw.ca> wrote:

> Kam-Hung Soh wrote:
>> On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:
>>
>>> Gabriel Genellina wrote:
>>>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca>  
>>>> escribi?:
>>>>
>>>>> Collin wrote:
>>>>>> I'm pretty new to Python, but this has really bugged me. I can't  
>>>>>> find a
>>>>>> way around it.
>>>>>>
>>>>>>
>>>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>>>
>>>>>> Any help would be appreciated. Thanks.
>>>>>
>>>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>>>  No need to apologize...
>>>>
>>>>> I read the error message just now a bit more carefully, and I tried
>>>>> something. I tried defining "yes" as some random numerical value.  
>>>>> Then
>>>>> when I did:
>>>>> (example code)
>>>>>
>>>>> yes = 123123983 #some number
>>>>> test = input("Test test test ")
>>>>> if test == yes:
>>>>>     print "It worked."
>>>>> else:
>>>>>     print "failed"
>>>>>
>>>>> (example code off)
>>>>  The usual way for Python<3.0 is:
>>>>  answer = raw_input("Test test test ").lower()
>>>> if answer == "yes":
>>>>      ...
>>>>  The input() function evaluates user input as an expression: if he  
>>>> types 2+5 the input() function returns the integer 7. I would never  
>>>> use input() in a program - it's way too unsafe; use always raw_input  
>>>> instead.
>>>>
>>>
>>> If I use it like that, do I have to import anything to have the  
>>> .lower() work? And if I do, what does the .lower() signify?
>>> -- http://mail.python.org/mailman/listinfo/python-list
>>>
>>  You don't need to import any module to use ".lower()"; it is a method  
>> of a string.  raw_input() returns a string, so you can use methods of a  
>> string.
>>  Try the following statement to see what happens:
>> "ABCDE".lower()
>>
>
> So the .lower() string method is just to convert the string to lowercase  
> letters so that you don't have to type a bunch of if - then statements  
> in both cases, I'm assuming?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's right.  If you normalize your input to all lower case or upper  
case, you make it easier to process user input.

Regards,

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From metallourlante at gmail.com  Sat May 17 07:08:56 2008
From: metallourlante at gmail.com (Alex)
Date: Sat, 17 May 2008 04:08:56 -0700 (PDT)
Subject: Help on thread pool
Message-ID: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>

Hi all.

In order to understand the concept of threading pool in python I'm
working on a simple single-site web crawler.
I would like to stop the program when the threading pool have
downloaded all internal links from a web site, but now my program keep
waiting forever even if there are no more links to download.

Here's my code, I appreciate any comments, I'm programming just for
fun and learning ;-)

Thanks in advance.

from BeautifulSoup import BeautifulSoup
import urllib
from pprint import pprint
import string
from urlparse import urlparse
import sys
from threading import Thread
import time
from Queue import Queue

#dirty hack: set default encoding to utf-8
reload(sys)
sys.setdefaultencoding('utf-8')

opener = urllib.FancyURLopener({})

class Crawler:

    def __init__(self):
        """
        Constructor
        """
        self.missed = 0
        self.url_list = []
        self.urls_queue = Queue()
        self.num_threads = 5

        self._create_threads()

    def get_internal_links(self,url):
        """
        Get all internal links from a web page and feed the queue
        """
        self.url = url
        url_netloc = urlparse(self.url).netloc
        print "Downloading... ", self.url
        time.sleep(5)
        try:
            p = opener.open(self.url)
            #print p.info()
        except IOError:
            print "error connecting to ", self.url
            print "wait..."
            time.sleep(5)
            print "retry..."
            try:
                p = urllib.urlopen(self.url)
            except IOError:
              self.missed = self.missed + 1
              return None

        html = p.read()
        soup = BeautifulSoup(html)
        anchors = soup.findAll('a')
        links = [ str(anchor['href']) for anchor in anchors]
        internal_links = [link for link in links if
(urlparse(link).netloc == url_netloc)]

        for link in internal_links:
            if link not in self.url_list and link != self.url:
                self.url_list.append(link)
                self.urls_queue.put(link)
        print "Queue size: ", self.urls_queue.qsize()
        print "List size: ", str(len(self.url_list))
        print "Errors: ", str(self.missed)
        self._queue_consumer()


    def _queue_consumer(self):
        """
        Consume the queue
        """
        while True:
            url = self.urls_queue.get()
            print 'Next url: ', url
            self.get_internal_links(url)
            self.urls_queue.task_done()


    def _create_threads(self):
        """
        Set up some threads to fetch pages
        """
        for i in range(self.num_threads):
	        worker = Thread(target=self._queue_consumer, args=())
	        worker.setDaemon(True)
	        worker.start()

#-----------------------------------------------------------------------------
#

if __name__ == '__main__':

    c = Crawler()
    c.get_internal_links('http://www.thinkpragmatic.net/')




From dmitrey.kroshko at scipy.org  Sun May 18 14:55:33 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 11:55:33 -0700 (PDT)
Subject: howto use pylint from Eric IDE?
References: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>
	<g0pc3h$jgk$1@online.de>
Message-ID: <6f8d242c-d7e6-4082-9cb2-e2f719a1a6dc@y21g2000hsf.googlegroups.com>

Since I have no project (and willing to create the one), just several
py-files, the Project->Check button is disabled.
Are there any other methods in v4.1.1 or more recent?
Thx, D.

On 18 ???, 16:48, Detlev Offenbach <det... at die-offenbachs.de> wrote:
> dmitrey wrote:
> > Hi all,
>
> > I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
> > cannot find how to use pylint from Eric IDE GUI.
> > Does anyone know?
>
> > Thank you in advance, D.
>
> Project->Check->Run PyLint
>
> Regards,
> Detlev
> --
> Detlev Offenbach
> det... at die-offenbachs.de



From wuwei23 at gmail.com  Mon May 26 06:47:36 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 03:47:36 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
Message-ID: <b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9@z16g2000prn.googlegroups.com>

On May 26, 7:21 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
> But I'd read that Python 3 is very different in many important ways.
> I read it right there on the Py3K site!  I can't make sense of how,
> why, even what, exactly, but that's not a misimpression on my part, I
> certain nonetheless...it's not just cosmetic changes but important
> ones pertaining to a sort of "linguistic logic" I gather....

Well, let's see what Guido says about the issue:

Q. I want to learn Python. Should I learn Python 2.6 or Python 3.0?

A. Definitely learn Python 2.x (the latest version out is 2.5). I
expect it'll be two years before you'll need to learn Python 3.0, and
the differences aren't that great from a beginner's perspective: most
of what you'll learn about 2.x will still hold about 3.0.

(from http://www.artima.com/weblogs/viewpost.jsp?thread=211200)


From castironpi at gmail.com  Sat May 17 23:55:19 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 20:55:19 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<g0mcd2$2qk0$2@news.mtu.ru>
	<91d4cf3b-e71f-4e73-90da-db0735f34035@c65g2000hsa.googlegroups.com>
Message-ID: <4a0aa0fb-4c43-4690-b31d-83475357da22@z72g2000hsb.googlegroups.com>

On May 17, 9:22?pm, castironpi <castiro... at gmail.com> wrote:
> On May 17, 5:35?am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
>
>
>
>
> > On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:
> > > Full day later, I think it, to emphasize state, would prioritize
> > > context. ?The reason for the huge ramble was, believe it or not,
> > > namespace conflict... as though any other states around here might nose
> > > in. ?And thanks to 'inhahe' for coming back with the question. ?...Which
> > > would explain next move to 'prioritize context'. Context is a high
> > > priority for people.
>
> > > I'm proposing to start on one on a computer. ?The first things a
> > > computer 'knows' are the boot, keyboard, & mouse. ?Yet on another scale,
> > > the first things it knows are BIOS, file system, and OS. ?On still
> > > another, the only thing it knows are interruptions. ?Knowledge is
> > > important to context. ?(The scales are ram on disk on, ram on disk off,
> > > and ram off, which may tell of the currency they and their power are
> > > bought with. ?Thence, we should be getting different values for lengths
> > > of time.)
>
> > > (Furthermore, we're all on different longitudes -and- latitudes.)
>
> > > Context comes from motion, perception, and composite perception
> > > (reperception e.a.o. memory). ?There is some reason to believe that
> > > motion and sight are different senses, perhaps so with stationary sound
> > > (gatcha) and mobile sound too. ?Do you go deaf of a tone after prolonged
> > > duration? ?That makes computers valuable commodities*: they have a
> > > symbolic interface, which no other unlive objects have. ?They have both
> > > mouse and keyboard.
>
> > > *I'm sure there is a precision to wants: what magnitude of what types of
> > > action a person wants from a day and for a time-- what energy states
> > > they go to and from (note phone on come to and come from.)
>
> > > Therefore, context should originate in mouse and keyboard.
>
> > > Humans have symbolic know-how: knowledge of how to convey intent
> > > digitally, though it may be there is no interpolation of 'intent per
> > > mouse-or-key', even though people are prone to empathize with faces.
> > > However, if you start with a 'me' and a 'no', you can get pretty
> > > logical.
>
> > > Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> > > rationally dimensional (?), though they do have magnitudes per mass and
> > > volume. ?The contingent of 'rationally dimensional' is having or
> > > beknowing/benouncing an orthonormal basis. ?Incidentally, '''orthography
> > > of a language specifies the correct way of using a specific writing
> > > system to write the language. .. Orthography is derived from Greek ?????
> > > orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
>
> > > Further incidentally, context and state may have more important in
> > > common than priority and price: privacy and safety are involved ex
> > > hypothesi. ?Incidentally = ...
>
> > > It is not clear that the first (cheapest best) human-computer language
> > > is a computer language, though if two were orthonormal in comparison to
> > > life, Python's fine. ?Not my first.
>
> > > In privacy concerns, it is not clear that duals aren't primitives to
> > > humans. ?What's a brain primitive? ?Lol: what is a primitive brain?
>
> > > On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> > >> I'm not an expert in this but what does it mean to emphasize state? ?It
> > >> seems the opposite of that would be a) functional programming, and b)
> > >> passing parameters instead of using global or relatively local
> > >> variables. And maybe c) coroutines (generators as implemented in
> > >> Python), although perhaps coroutines could be said to emphasize state
> > >> inasmuch as they go out of their way to capture, objectify and reuse it
> > >> (Stackless' microthreads, even moreso). ?And Python seems to be
> > >> well-noted for implementing some functional programming methodology,
> > >> and as for passing parameters it's just as object-oriented as the rest
> > >> of them.
>
> > >> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > >> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > >> > true?- Hide quoted text -
>
> > >> - Show quoted text -
>
> > Castironpi,
>
> > I love you! You remind me of all the kittens and puuppies I had when I
> > was a child.
>
> > I #define this. Hope your database could give us something funny again.
>
> > -- Ivan- Hide quoted text -
>
> > - Show quoted text -
>
> I have to talk about crossing threats. ?But talking about threads is
> like talking, and people talk about food. ?What are some threats to be
> scared of? ?What about threads to be thunder?- Hide quoted text -
>
> - Show quoted text -

I have to question sincerity, which is disappointing for a night.
Does anyone live in a city?


From sajmikins at gmail.com  Wed May 21 13:11:09 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 21 May 2008 10:11:09 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com> 
	<48340938$0$10773$426a74cc@news.free.fr>
Message-ID: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>

On May 21, 4:36 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Simon Forman a ?crit :
>
>
>
> > On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> >> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
> >>> You don't need all those conditionals. A set differs from a list
> >>> precisely in the fact that each element is unique. And since the
> >>> function is expecting "s" to be an iterable object, it can be
> >>> constructed even without a for loop:
> >>> def compress(s):
> >>>     return list(set(s))
> >>> That does the trick.
> >> Only if order does not need to be maintained.  list(set(s)) will not
> >> necessarily keep the unique characters in the order they are seen.
> >> We'll have to check with the OP to see if this is important (I just
> >> assumed that it was because of the use of list comps).
>
> >> -- Paul
>
> > If order is important, you can use sorted() instead of list() like so:
>
> > def compress(s):
> >     new = sorted(set(s), key=s.index)
> >     return return ''.join(new)
>
> This won't still preserve the *original* order.


I don't understand.

new will contain each unique item in s, sorted in order of the items'
first occurance in s, right?
There are other ways to do it (other functions that could be passed to
sorted() as the key arg) of course, but this seems like a good value
of "original order", no? :)

Regards,
~S


From marco at sferacarta.com  Thu May  8 11:51:17 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 17:51:17 +0200
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <_jFUj.36624$o06.17318@tornado.fastwebnet.it>

spectrumdt at gmail.com wrote:

> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python.

It should work.

Do you have a bare except: which intercepts SystemExit as well?

If so, be as specific as possible in what you intercept, or at least 
catch StandardError:

In [1]: StandardError ?
Type:           type
Base Class:     <type 'type'>
String Form:    <type 'exceptions.StandardError'>
Namespace:      Python builtin
Docstring:
     Base class for all standard Python exceptions that do not represent
     interpreter exiting.


From castironpi at gmail.com  Wed May 14 13:54:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:54:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <mailman.1117.1210772083.12834.python-list@python.org> 
	<6908kuF2ud4e1U1@mid.uni-berlin.de>
Message-ID: <72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>

On May 14, 8:43?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >>> That's also a myth. ?For example, if C is easy to maintain, why is
> >>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> >>> the world? ?There should be lots of single-asset 8-by-8 shotgun cross
> >>> compilers written in C, if C is easier to maintain.
> >>Not only is it the world's only "single-asset 8-by-8 shotgun cross
> >>compiler," but according to google, it's also the world's only "shotgun
> >>cross compiler" period. ?But I guess if you make up your own terminology
> >>you're bound to be unique. ?:) ?Do you mind if I ask: what exactly is a
> >>single-asset 8x8 shotgun cross compiler, and what makes that of any
> >>value to me?
>
> > The web page explains. ?It's a compiler that runs on 8 platforms and can
> > generate executables for any of them on any of them. ?It's not _totally_
> > clear about what "single-asset" means, but it gives the impression (and
> > the term somewhat suggests) that this means there's a single executable
> > that does all of this (compare to gcc's design, where support for cross
> > compiling to another arch is provided by a separate executable).
>
> Which isn't too hard if all you have are simple datatypes as a handfull
> numerical types + strings.
>
> Besides, from what I see, the supported platforms all are x86, 32bit &
> 64bit. And I bet GCC works pretty unmodified amongst these as well - only
> binary formats differ. But let Flaming Thunder grow a library system with
> dynamic loading, and I wonder how well his crosscompiler works..
>
> Diez- Hide quoted text -
>
> - Show quoted text -

8x8 is pretty easy to aim for.  Turn on 16x16, and you're the laptop
to stand on.  FxF?


From Lie.1296 at gmail.com  Wed May 21 14:23:58 2008
From: Lie.1296 at gmail.com (Lie)
Date: Wed, 21 May 2008 11:23:58 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <a93ad901-3ea4-4d72-be3e-b1edffd08221@w34g2000prm.googlegroups.com>

On May 20, 2:39?am, destroooooy <destrooo... at gmail.com> wrote:
> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.
>
> Thanks in advance!

If we're talking in English, it would be like this:

There is a person with a black hair called A
There is another person with a black hair called B
A has a nickname C

All of these statements are true:
A.haircolor == B.haircolor
A is C

but this is NOT true:
A is B # is False

and this is debatable:
A == B

whether A is similar enough to B so that they can be said to be equal
is debatable and depends on the purpose of the comparison (which is
why equality comparison is overridable while identity comparison is
not).


From alefnula at gmail.com  Fri May  9 09:35:45 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 06:35:45 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
	<50ea9d09-a315-4342-aaac-f5d8e5c5da15@x41g2000hsb.googlegroups.com>
Message-ID: <13f84fe5-e60e-493e-9301-ed178344f6e5@26g2000hsk.googlegroups.com>

I figured out the first two solutions, but the third looks like the
most cleaner, think I'll use that one...

Thank you everyone. :)

On May 9, 3:24 pm, George Sakkis <george.sak... at gmail.com> wrote:
> The decorator does receive the correct function. The problem is that
> at this point __init__ is still a plain function, not a method, i.e.
> the sequence is:
>    function -> decorated function -> method
>
> There are several workarounds if you really want to differentiate
> between functions and methods, none of them perfect:
>
> - Apply the decorator after the class has been built, i.e. after the
> functions have been wrapped in (unbound) methods:
>     A.__init__ = w(A.__init__)
>
> - (Risky Hack): Guess whether a function is intended to be wrapped in
> a method by checking whether its first argument is named "self".
> Obviously this is not foolproof and it doesn't work for static/class
> methods.
>
> - Have two different decorators, one intended for plain functions and
> one for functions-to-be-methods (e.g. @deco, @decomethod).
>
> George



From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:52:22 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:52:22 +0200
Subject: python newbie: some surprises
In-Reply-To: <VHQUj.124646$Cj7.90968@pd7urf2no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <482410c6$0$5108$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
(snip)
> I see the point of the OP. Couldn't the new-line be used as an 
> equivalent of  ':', 


Technically, yes. OTHO, the ':' helps editors doing proper indentation.


From znfmail-pythonlang at yahoo.com  Wed May 14 11:30:19 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Wed, 14 May 2008 11:30:19 -0400
Subject: working with images (PIL ?)
Message-ID: <g0f0ib$3im$1@aioe.org>

I need to write a program to examine images (JPG) and determine how much 
area is whitespace. We need to throw a returned image out if too much of it 
is whitespace from the dataset we're working with. I've been examining the 
Python Image Library and can not determine if it offers the needed 
functionality. Does anyone have suggestions of other image libraries I 
should be looking at it, or if PIL can do what I need? 




From scott.hafeman at rogers.com  Fri May 23 13:14:05 2008
From: scott.hafeman at rogers.com (scott.hafeman at rogers.com)
Date: Fri, 23 May 2008 10:14:05 -0700 (PDT)
Subject: Shell-independent *nix setup script
References: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
	<g14ojr$mb$1@solaris.cc.vt.edu>
Message-ID: <5c476ba7-1189-465f-b964-61790da9d0e4@w4g2000prd.googlegroups.com>

On May 22, 5:29?pm, brad <byte8b... at gmail.com> wrote:
> scott.hafe... at rogers.com wrote:
> > Hi,
> > Is it worthwhile maintaining a production application setup script in
> > Python as opposed to shell-script? ?
>
> I do not think so. Perhaps 'in conjunction with', but not 'opposed
> to'... sh is the lowest common denominator of shells. Script for sh and
> your script will run on most any Unix. Python is gaining acceptance, but
> is still not present everywhere by default... Solaris for example.

If we consider the approach 'in conjunction with', is the following
adequately robust?
$ source app_setup.sh

#File: app_setup.sh
# -. shell-script .-
# Assume we can figure out some basic version of a python interpreter:
#  standalone executable
#  embedded within another application, providing basic libpython.a
features
#
$PYTHON sniffEnvWithComplexLogic.py 'shCompatibleEnvSettings.txt'
source shCompatibleEnvSettings.txt


From eduardo.padoan at gmail.com  Fri May 16 18:38:52 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 16 May 2008 19:38:52 -0300
Subject: can't delete from a dictionary in a loop
In-Reply-To: <482DFF63.7020701@islandtraining.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<482DFF63.7020701@islandtraining.com>
Message-ID: <dea92f560805161538w28aacc8fn3eea1c44f5574d49@mail.gmail.com>

On Fri, May 16, 2008 at 6:40 PM, Gary Herron <gherron at islandtraining.com> wrote:
> bruno.desthuilliers at gmail.com wrote:
>>
>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>
>>>
>>> Dan Upton wrote:
>>>
>>>>
>>>> for pid in procs_dict:
>>>>  if procs_dict[pid].poll() != None
>>>>   # do the counter updates
>>>>   del procs_dict[pid]
>>>>      The problem:
>>>>      RuntimeError: dictionary changed size during iteration
>>>>
>>>
>>> I don't know if the setup with the pids in a dictionary is the best way
>>> to
>>> manage a pool of processes... I'll leave it others, presumably more
>>> knowledgable, to comment on that. :-)  But I can tell you how to solve
>>> the
>>> immediate problem:
>>>
>>>   for pid in procs_dict.keys():
>>>
>
> No, keys() produces a list (which is what is wanted here).
> It's iterkeys() that produces an iterator which would reproduce the OP's
> problem.
>
> And then, in Python3, keys() produces something else altogether (call a view
> of the dictionary) which would provoke the same problem, so yet another
> solution would have to be found then.

In Python 3.0, list(procs_dict.keys()) would have the same effect.



> Gary Herron
>
>>
>> I'm afraid this will do the same exact thing. A for loop on a dict
>> iterates over the dict keys, so both statements are strictly
>> equivalent from a practical POV.
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
    Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From squareswallower at 1ya2hoo3.net  Wed May  7 21:02:12 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Wed, 7 May 2008 19:02:12 -0600
Subject: anagram finder / dict mapping question
Message-ID: <fvtjek$80a$1@news.xmission.com>

Hi All,

I wrote a program that takes a string sequence and finds all the words 
inside a text file (one word per line) and prints them:

def anagfind(letters): 	#find anagrams of these letters
	fin = open('text.txt')	#one word per line file
	wordbox = []		 #this is where the words will go
	for line in fin:
		word = line.strip()
		count = 0
		for char in letters:
			if char not in word:
				break
			else:
				count += 1
			if count == len(word):
				wordbox.append(word)
	return wordbox

Now I'd like to modify the code to naturally find all anagrams inside a 
wordlist.  What would be the best way to do this?  Using Hints?  Is it 
possible to iterate over dict keys?  How can I make a dict that maps 
from a set of letters to a list of words that are spelled from those 
letters?  Wouldn't I need to make the set of letters a key in a dict?

As always - Thanks for helping someone trying to learn...

Dave



From max at alcyone.com  Fri May  2 14:32:01 2008
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 02 May 2008 11:32:01 -0700
Subject: Do you know of a much simpler way of writing a program that writes
	a program?
In-Reply-To: <mailman.455.1209736660.12834.python-list@python.org>
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <CcydnSHH88u7w4bVnZ2dnUVZ_u-dnZ2d@speakeasy.net>

mcse jung wrote:

> Here is asample program that writes a program and then executes it.  
> Do you knowof a much simpler way of writing a program that writes a program?

It looks like you have a program which is more printed text than program 
logic.  In which case, the usual solution is to use a templating system, 
where most of the text is unmodified and you only set out the specific 
areas where you want to insert logic.

EmPy is one:

	http://www.alcyone.com/software/empy/

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From castironpi at gmail.com  Sun May  4 07:11:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 04:11:35 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
Message-ID: <dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>

On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>
> > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
> >> I'm actually curious if there's a way to write a generator function
> >> (not a generator expression) in C, or what the simplest way to do it
> >> is... besides link the Python run-time.
>
> > The reference implementation of Python is written in C, so obviously there
> > must be a way to write something like generators in C.
>
> Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
> See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> --
> Gabriel Genellina

Gabriel,
How did your attempt turn out from last May?  At first look, it's
outside the scope of Python, but it is not the scope of C
necessarily.  Generators offer a lot of simplicity (which I haven't
read about extensively, but am starting to see) that could gain some
reputation for Python.  What is the midpoint at which C could meet
Python?

There is no such thing as a 'frame' per se in C; byte code is
integral.  As there is no such thing as suspended state without
frames, and no such thing as generators without suspended state.  It's
a hard thing to Google for without knowing the prior terminology for
the work that's already been done on them in C.  What work is there?
Are any devs interested in pursuing it?

The frame implementation.

http://svn.python.org/projects/python/trunk/Include/frameobject.h
http://svn.python.org/projects/python/trunk/Objects/frameobject.c

The generator code.

http://svn.python.org/projects/python/trunk/Include/genobject.h
http://svn.python.org/projects/python/trunk/Objects/genobject.c

I used Microsoft's search engine (python frame generator
site:svn.python.org , links 3 and 5) to find it.


From hdante at gmail.com  Fri May 30 10:36:50 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 30 May 2008 07:36:50 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com> 
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com> 
	<mailman.1626.1211831386.12834.python-list@python.org>
	<80531$483b266d$3799@news.teranews.com>
Message-ID: <eb20fd69-5dea-42c1-a66a-97aef96f6af9@26g2000hsk.googlegroups.com>

On May 26, 6:06?pm, Paul Miller <n... at this.time> wrote:
> On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:
> > On Mon, May 26, 2008 at 3:22 PM, ?<miller.pau... at gmail.com> wrote:
> > I don't know if it would necessarily look like the CPython VM, except
> > for the decode stage (this being said without any knowledge of the
> > CPython implementation, but with more than I ever thought I'd know about
> > processor architecture/microarchitecture)
>
> Out of curiosity, do you know how easy it would be to make a Python chip
> using FPGAs? ?I have little to no hardware knowledge, but it sounds like
> a fun project in any case. ?Even if it's not likely to have blazing
> performance, it'd be cool to load Python bytecode directly into
> memory. :-)
>
> --
> code.py: a blog about Python. ?http://pythonista.wordpress.com
> ** Posted fromhttp://www.teranews.com**

 The python VM is too "high level". :-) I think a python CPU would
need to be developed in two layers, one that looks like a typical
processor and another that executes complex instructions
(microcode ?). The low level part takes some weeks (one week or so if
you have the whole architecture figured out) in VHDL. Once I claimed
to have done this in an April Fool's day. It was fun. :-D


From python-url at phaseit.net  Mon May 19 13:49:51 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 19 May 2008 17:49:51 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 19)
Message-ID: <g0sejv$t99$1@lairds.us>

QOTW:  "IIRC the idea was so that managers could write programs in English.
It failed because nobody could write a parser that would handle something
like 'The bottom line is that the stakeholder group requires the situation
going forward to be such as to facilitate the variable known as x to provide
the same outcome when stimulated by dereferencing as the variable known as
y'." - John Machin
    http://groups.google.com/group/comp.lang.python/msg/aefcc0ca19f6d9b3,
    from his oral history of COBOL

    
    A problem with async_chat.push and why it works that way:
        http://mail.python.org/pipermail/python-list/2008-May/491027.html
    
    How to remove dictionary entries when iterating over it:
        http://mail.python.org/pipermail/python-list/2008-May/491739.html
    
    Classmethods: why do they exist, and its behavior compared with metaclass
    methods:
        http://mail.python.org/pipermail/python-list/2008-May/491280.html
        http://mail.python.org/pipermail/python-list/2008-May/491793.html

    Free PDFs of *Python Magazine* available:
	http://mail.python.org/pipermail/advocacy/2008-May/000587.html
    
    Two problems due to the "all objects are comparable by default" philosophy 
    in Python 2.x:
        http://mail.python.org/pipermail/python-list/2008-May/491600.html
        http://mail.python.org/pipermail/python-list/2008-May/491388.html
    
    A hundred ways of writing the FizzBuzz test - and whether it is effective
    or not:
        http://mail.python.org/pipermail/python-list/2008-May/490584.html
    
    Why to learn Python if one doesn't have to:
        http://mail.python.org/pipermail/python-list/2008-May/490856.html
    
    How to create a restricted (safer) Python environment:
        http://mail.python.org/pipermail/python-list/2008-May/490705.html
    
    How to emulate the "indexed property" concept from Object Pascal:
        http://mail.python.org/pipermail/python-list/2008-May/491354.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From mcknight0219 at gmail.com  Mon May 12 03:25:25 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 00:25:25 -0700 (PDT)
Subject: Problem with custom events in wxpython
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
	<mailman.941.1210519666.12834.python-list@python.org>
Message-ID: <3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>

On May 11, 11:27 pm, "Frank Niessink" <fr... at niessink.com> wrote:
> Hi Jimmy,
>
> 2008/5/11 Jimmy <mcknight0... at gmail.com>:
>
> > hi, all
>
> > I'm having a problem with creating custom events in wxpython.
>
> > I have a class A handling some data processing work and another class
> > B of GUI matter. I need GUI to display information when data in A is
> > updated.
> > I know cutom events in wxpython may work.
>
> You may want to look at the pubsub module. Available as wx.lib.pubsub
> in wxPython:http://www.wxpython.org/docs/api/wx.lib.pubsub-module.html,
> and also available separately on PyPI:http://pypi.python.org/pypi/PyPubSub/
>
> Cheers, Frank

hi, thanks
it works! however, it seems the message can not be exchanged between
processes :(
actually what I want to do is let a running process send data to GUI
process and display it


From arnodel at googlemail.com  Tue May 20 14:38:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 19:38:48 +0100
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
	<g0v4n8$4dk$1@registered.motzarella.org>
Message-ID: <m2hccs7rd3.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Nikhil wrote:
>> Hi,
>>
>> I am using python -i, and I find it hard typing/pasting the commands
>> from the previous interactive shell. Basically, is there anyway that
>> I can preserve the history in the shell?
>> I guess but not sure there should be something like ~/.pyrc for
>> configuring such but can someone please let me know what is the
>> effective environment variable to preserve the history?
>>
>> Thanks,
>> Nikhil
> I figured it out. This below thing works fine for me.
> BTW, I got it from http://docs.python.org/tut/node15.html. A little
> search would not hurt ;-)

Or you could use IPython (http://ipython.scipy.org/), "an Enhanced
Python Shell".

-- 
Arnaud


From castironpi at gmail.com  Wed May  7 20:22:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:22:31 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<fvtfni$6pj$2@news.mtu.ru>
Message-ID: <8e6cc35c-a4a8-46ca-9bbb-798fb193f530@j22g2000hsf.googlegroups.com>

On May 7, 6:58?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Wed, 07 May 2008 23:46:33 +0000, Ivan Illarionov wrote:
> > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>
> >> Is there a way to do:
> >> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> >> x[0,2:6]
>
> >> That would return:
> >> [0, 3, 4, 5, 6]
>
> > IMHO this notation is confusing.
>
> > What's wrong with:
> > [0]+x[2:6]
>
> >> I am surprised this notation is not supported, it seems intuitive. A
> >> concrete example of the sort of thing I want to do:
>
> >> p = file('/etc/passwd').readlines()
> >> q = [ e.strip().split(':')[0,2:] for e in p ]
>
> >> (getting rid of the password / x field)
>
> > This works and is clearer:
> > [[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]
>
> or maybe you wanted to do this:
>
> >>> [e.split(':')[0] for e in open('/etc/passwd')]
>
> ['root', 'daemon', 'bin', 'sys', 'sync', ...]
>
> What are you trying to get from /etc/passwd?
>
> --
> Ivan- Hide quoted text -
>
> - Show quoted text -

The t.  Oughtn't there be a run on Guido's name more often than is?

You -could- write:

x[ slice(0)+slice(2,6) ]

where slice would be an 'autochaining' type under a syntax.  Fine for
slices, not for logic.

x[ b1+And+b2+Or+b3 ]

would also register as b1 and b2 or b3, which really quickly rises on
the wheel again, er, um, crawls up the spout.

Would you be happy with x[ '0,2:6' ], necessarily in quotes?  With two
punctuation marks you couldn't get much farther in money than Python
does today.

x[ '0 2:6' ]
-> x.__getitem__( x, '0 2:6' )
-> '0 2:6'.split( )
-> x.__getslice__( x, slice( 0 ) )
... + x.__getslice__( x, slice( 2, 6 ) )

However, it's not clear it's trivial to overwrite a built-in type's
__getitem__!


From marlin_rowley at hotmail.com  Thu May 22 17:24:11 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 22 May 2008 16:24:11 -0500
Subject: How do I make a copy of my class object?
Message-ID: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>

All:
 
I have a class object which has the usual data members and functions.  I'm trying to make a copy of this class (which includes wx.Bitmap objects) but deepcopy() doesn't seem to work.  How would I do this?
 
-M
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From andreas.tawn at ubisoft.com  Thu May 15 12:33:21 2008
From: andreas.tawn at ubisoft.com (Andreas Tawn)
Date: Thu, 15 May 2008 18:33:21 +0200
Subject: file open/read/name etc, not working
In-Reply-To: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <8AEDA5E3386EA742B8C24C95FF0C75800403F774@PDC-MAIL3.ubisoft.org>

>import os
>
>print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
>d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
>d.readline()
>
>returns true in the shell but prints no text even though the document
>contains text.
>
>d.name returns nothing, d.name() raises an error.
>--
>http://mail.python.org/mailman/listinfo/python-list

Try...

import os

print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
for line in d:
	print line


And I'm guessing that's a typo in flim.txt?

Cheers,

Drea


From arnodel at googlemail.com  Tue May 27 14:06:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 19:06:51 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<mailman.1660.1211910251.12834.python-list@python.org>
Message-ID: <m21w3n62pw.fsf@googlemail.com>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnjsal at nospamgmail.com> wrote:
>> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
>> news:69g605F2v4102U2 at mid.uni-berlin.de...
>>> After being corrected about missing the construction of a None-containing
>>> list, one needs of course to think about the waste of resources, as a
>>> possible result-list is created in any case.
>>
>> Yeah, I was already aware of the list of Nones, which is why I asked. Simply
>> typing the list comprehension without an assignment just *looked* wrong,
>> too.
>
> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

This is crazy!

-- 
Arnaud


From deets at nospam.web.de  Fri May 16 08:26:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 14:26:05 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
Message-ID: <695crbF303jk4U1@mid.uni-berlin.de>

> 
>  Did you consider gzipping your XML (or YAML) packets ? Would the
> transfer time be acceptable in this case ?

That would add even more to the overhead of transcoding the 
transportlayer. Switching from XMLRPC to a json-based protocol reduced 
in a project of mine reduced the overhead 10-20fold - mainly because of 
reduced size and parsing efforts.

Diez


From ppearson at nowhere.invalid  Thu May  1 16:54:08 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Thu, 01 May 2008 15:54:08 -0500
Subject: Getting started with pyvtk
Message-ID: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>

I'm trying to get started with pyvtk, the Python interface
to the Visualization Toolkit, but there's obviously
something important that I haven't figured out after an
embarrassingly long morning of googling around.  When I run
sample pyvtk code (example1.py, from
http://cens.ioc.ee/cgi-bin/viewcvs.cgi/python/pyvtk/examples/example1.py),
nothing graphical happens, but some text files appear named
example1.vtk and example1b.vtk.  Guessing that I need to
feed one of these to vtk, I tried "vtk <example1.vtk" and
"vtk example1.vtk", but those result in (different) error
messages that I think mean example1.vtk is not the language
that vtk expects.  Simply running "vtk" (apparently 4.0)
gets a prompt that has no help command, and "man vtk" just
tells me it's like "wish", and "man wish" doesn't address
what to do with a vtk file.

What key piece am I missing?

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From pavlovevidence at gmail.com  Thu May 22 00:22:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 21:22:29 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com> 
	<a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>
Message-ID: <39a12039-bfc9-4587-81ab-eb070cd51133@t54g2000hsg.googlegroups.com>

On May 21, 11:27 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 21, 7:01 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>
> > The crucial thing is not to slow down the calculations with useless
> > bells and whistles.
>
> Are you running your simulations on a system that does or does not
> support the "useless bell and whistle" of correct rounding?  If not,
> how do you prevent regression towards 0?

The "useless bell and whistle" is switching to multiprecision.

I'm not sure whether our hardware has a rounding bias or not but I
doubt it would matter if it did.


> For example, one of the things that caused the PS3 to be in 3rd place
> behind the Wii and XBox 360 is that to save a cycle or two, the PS3
> cell core does not support rounding of single precision results -- it
> truncates them towards 0.  That led to horrible single-pixel errors in
> the early demos I saw, which in term helped contribute to game release
> delays, which has turned into a major disappointment for Sony.

And you believe that automatically detecting rounding errors and
switching to multi-precision in software would have saved Sony all
this?


Carl Banks


From aisaac at american.edu  Thu May 29 18:54:41 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 22:54:41 GMT
Subject: code of a function
In-Reply-To: <mailman.1741.1212074713.12834.python-list@python.org>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org>
Message-ID: <RuG%j.37511$3j.21433@trnddc05>

Anand Patil wrote:
> If you're using IPython, you can do svd?? . 


http://www.scipy.org/doc/numpy_api_docs/numpy.linalg.linalg.html

hth,
Alan Isaac


From danb_83 at yahoo.com  Tue May 27 19:04:55 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 27 May 2008 16:04:55 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>

On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian
> notation, but just for when it's appropriate.

pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.


From arnodel at googlemail.com  Tue May 27 03:00:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 08:00:54 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
	<98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>
Message-ID: <m28wxw5izd.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> I used Arnaud's suggestion with a few minor tweaks, as follows:
>
> #-----
> fset = frozenset
> s0 = fset([1])
> s1 = fset([1,2])
> s2 = fset([2])
>
> # let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
> S = set([s1,s2])
>
> # X is the "domain", C is the set of complements in X of elements of
> S
> X = set()
> for s in S:
>     X |= s
> print "s0 is ", s0
> print "S is ", S
> print "X is ", X
>
> C = set(fset(X - s) for s in S if fset(X-s))
> print "C is ", C
>
> # Find the "fibers" at each element x of s0.
> # A fiber at x is the set of all s in S or C that contain x
> from collections import defaultdict
> fibers = defaultdict(list)
> for s in S | C:
>     for x in s & s0:
>         fibers[x].append(s)
> print "fibers are ", fibers
>
> # Find the "seeds" at each x in s0.
> # A seed at x is the set of all elements contained in all s in the
> fiber at x.
> # Intutively, a seed at x is the smallest set containing x that can
> be
> # built from S
> seeds = set()
> for F in fibers.itervalues():
>     seeds &= set(F)
Change this to:

seeds = []
for F in fibers.itervalues():
    seed = X
    for f in F:
        seed &= f
    seeds.append(seed)

And the whole thing should work

HTH

> print 'seeds are ', seeds
>
> # Now we know if there is a solution:
> sol = set()
> for s in seeds:
>     sol |= s
> if sol != s0:
>     print "No solution"
> else:
>     print "Solution: union(intersection(fibers[x]) for x in s0)"
> #-----
>
> yields this:
>
> s0 is frozenset([1])
> S is  set([frozenset([1, 2]), frozenset([2])])
> X is  set([1, 2])
> C is  set([frozenset([1])])
> fibers are  defaultdict(<type 'list'>, {1: [frozenset([1, 2]),
> frozenset([1])]})
> seeds are  set([])
> No solution
>
>
> I follow your logic up to the point of the "seeds," where I get a bit
> confused. Thanks much! for the idea, I'm going to keep thinking about
> it. Any other ideas are *most* welcome. -- PB.

-- 
Arnaud


From torriem at gmail.com  Thu May  1 12:49:41 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 10:49:41 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
Message-ID: <4819F4A5.4010302@gmail.com>

Jens wrote:
> - Why is it, when primitive data types seem to be objects (similar to
> javascript), that type casting is done through build-in functions
> rather than methods, e.g. String.toInt('5') or '5'.toInt() or x =
> Integer.fromString('5').

Mainly because it's much cleaner to do it the python way (absolutely
explicit), and just as clear or clearer what you are intending to do.
Digging a little deeper, you'll find that the built-in function "str,"
for example, actually calls object.__str__().  This is nice because it
allows any object class to define that method and have it work with
str() in a manner consistent across python.  It preserves some amount of
uniformity.

The second example, x = Integer.fromString('5') demonstrates a huge
weakness in Java.  In python, rather than asking an integer object to
convert from a limited selection of other objects, python works the
other way, asking objects to convert themselves to integers (if they
can).  We don't worry about the size of integers, since python's
integers are auto-sizing.  So any object that implements the __int__()
method can be used with the classic "int()" built-in function.  The same
goes for __float__ and float().

Little things like this really make me happy about how python does
things generally.  I think much of how Java works with Integer and
String (as you describe above) is because Java has primitive types
(which aren't objects at all) and then boxed objects around the
primitive types.  Python eliminates this idea, and makes everything,
even "simple" types objects.

Now sure python could just say always call the "int()" or "float()" or
"str()" method on objects to produce those respective conversions.  But
using a combination of a built-in language function and a specialized,
reserved class method name, allows a lot of flexibility without
infringing on the programmer's need to use method names like "int,
float, or str" if he or she so desired.



From mattheww at chiark.greenend.org.uk  Wed May 14 12:58:41 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 14 May 2008 17:58:41 +0100 (BST)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
	<iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com>
Message-ID: <TSF*qAScs@news.chiark.greenend.org.uk>

I V  <ivlenin at gmail.com> wrote:
> I hadn't heard of operator.truth before. Does it do anything different 
> from bool(x) ?

Not really. It was occasionally useful before the bool type existed;
now it's just a leftover.

-M-


From anna.k.lawrence at baesystems.com  Fri May  9 14:33:31 2008
From: anna.k.lawrence at baesystems.com (Lawrence, Anna K (US SSA))
Date: Fri, 9 May 2008 11:33:31 -0700
Subject: Not able to get utf8 encoded string into a document
Message-ID: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>

Hi all,

 

This is my first post and I'm really at a loss for how to fix my
problem, so I really hope someone can help me out.

 

I am working on a web application using Pylons .0.9.6, SQLAlchemy 0.4.4,
MySQLdb 1.2.2 and Python 2.4.4.

 

We want to use utf8 encoding throughout and as far as I can see
everything is set properly between components and I've got a
sitecustomize.py in my site-packages directory of python set to utf8 as
well.  Everything is stored properly in the database and displays nicely
in the app.  However, when I try to take a string that is coming out of
the database and export it to a Word document, no amount of
encoding/decoding will make the Word doc display properly.

 

Since I'm on a Windows machine, my default locale is cp437.  Is this the
reason?

 

Is there something that needs to be set that I'm missing?  Any help
would be greatly appreciated.

 

Thanks,

Anna

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From martin at v.loewis.de  Fri May 23 13:38:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 23 May 2008 19:38:07 +0200
Subject: array of 64-bit ints?
In-Reply-To: <g16tub$qoj$1@rumours.uwaterloo.ca>
References: <g16tub$qoj$1@rumours.uwaterloo.ca>
Message-ID: <483700FF.1020704@v.loewis.de>

> Is it possible to have an array of 64-bit-ints using the standard Python 
> array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
> "long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
> "long long int" or "size_t".  However, according to the Python array 
> documentation, arrays of "size_t" or "long long int" are not available.

No, it's not possible.

Regards,
Martin


From deets at nospam.web.de  Fri May 23 06:50:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 12:50:42 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <4836994e$0$11625$607ed4bc@cv.net>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
Message-ID: <69nls3F344g2cU1@mid.uni-berlin.de>

Andrew Lee schrieb:
> Diez B. Roggisch wrote:
>> Jimmy schrieb:
>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>> Jimmy wrote:
>>>>> Hi to all
>>>>> python now has grown to a versatile language that can
>>>>> accomplish tasks for many different purposes. However,
>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>> So I am wondering if python can do some kernel coding that
>>>>> used to be the private garden of C/C++. For example, can python
>>>>> intercept the input of keyboard on a system level? someone told me
>>>>> it's a kernel thing, isn't it?
>>>> http://wiki.python.org/moin/elmer
>>>
>>> well, straightly speaking, how can I know a key is pressed on a system-
>>> level if
>>> using python?
>>
>> What has that todo with kernel programming? You can use e.g. pygame to 
>> get keystrokes. Or under linux, read (if you are root) the keyboard 
>> input file - I've done that to support several keyboards attached to a 
>> machine.
>>
>> And the original question: no, python can't be used as kernel 
>> programming language. Amongst other reasons, performance & the GIL 
>> prevent that.
>>
>> Diez
> 
> http://www.kernel-panic.it/programming/py-pf/
> 
> Of course you can code kernel routines in Python -- you are just calling 
> the underlying C interface.  The GIL means you have to manage 
> threadsafety on your own -- it doesn't imply kernel programming can not 
> be done.

I understood the OP's question as "can one program kernelspace routines 
in python". Which I don't think is possible. And I don't see how py-pf 
does that either.

Diez


From sebastian.noack at googlemail.com  Tue May 27 04:51:47 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Tue, 27 May 2008 01:51:47 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
Message-ID: <414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>

I have written a FileWrapper class as workaround, which works for me
(see the code below). The FileWrapper object holds an internal file-
like object and maps its attributes, but prevents the user (in this
case tarfile) from closing the internal file, so I can still access
StringIO's content after closing the TarFile object.

But this should not be required to create in memory tar files. It is
definitely a bug, that TarFile closes external file objects passed to
tarfile.open, when closing the TarFile object. The code which opens a
file is also responsible for closing it.

Regards
Sebastian Noack


#
# File: StringIO-tarfile.py
#
#!/usr/bin/env python

from StringIO import StringIO
import tarfile
import sys

class FileWrapper(object):
	def __init__(self, fileobj):
		self.file = fileobj
		self.closed = fileobj.closed

	def __getattr__(self, name):
		# Raise AttributeError, if it isn't a file attribute.
		if name not in dir(file):
			raise AttributeError(name)

		# Get the attribute of the internal file object.
		value = getattr(self.file, name)

		# Raise a ValueError, if the attribute is callable (e.g. an instance
		# method) and the FileWrapper is closed.
		if callable(value) and self.closed:
			raise ValueError('I/O operation on closed file')
		return value

	def close(self):
		self.closed = True

def create_tar_file(filenames, fileobj, mode):
	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
	for f in filenames:
		tar_file.add(f)
	tar_file.close()

if __name__ == '__main__':
	files = sys.argv[1:]
	modes = ['w%s%s' % (x, y) for x in (':', '|') for y in ('', 'gz',
'bz2')]

	for mode in modes:
		ext = mode.replace('w|', '-pipe.tar.').replace('w:',
'.tar.').rstrip('.')
		# StringIO test.
		stream = FileWrapper(StringIO())
		create_tar_file(files, stream, mode)
		fd = open('StringIO%s' % ext, 'w')
		fd.write(stream.file.getvalue())
		stream.file.close()
		fd.close()

		# file object test.
		fd = open('file%s' % ext, 'w')
		create_tar_file(files, fd, mode)


From heikki at osafoundation.org  Fri May  2 15:42:33 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 12:42:33 -0700
Subject: Python and SOAP status
In-Reply-To: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>

Sorry, suds link should have been https://fedorahosted.org/suds

-- 
  Heikki Toivonen


From bronger at physik.rwth-aachen.de  Thu May  1 02:09:14 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 08:09:14 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
	<6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>
Message-ID: <87abjablo5.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

>> I didn't look it up myself, but maybe a __init__.py file is missing
>> so that it can be recognised as a package.
>
> No, every single one (S, B, and W) has its own __init__.py
>
>> >> > in u.py Python gives "ImportError: No module named S".
>>
>> >> A silly question: is the directory that contains "S" in PYTHONPATH or
>> >> in sys.path?
>>
>> > It's in sys.path.
>>
>> "S" or its parent directory?
>
> I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?

Try r'C:\Users\Myname'.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From darcy at druid.net  Fri May  2 10:15:08 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 10:15:08 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87k5iczvdy.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
Message-ID: <20080502101508.a1562849.darcy@druid.net>

On Fri, 02 May 2008 23:30:01 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> The OP was asking why people prefer on over the other. My answer is
> that I prefer specifying "give me the default OS Python" because
> anything not installed by the OS is to non-standardised for me to
> worry about.

As someone else pointed out, not all the world is Linux.  So your
version of Linux (I'm not sure whether it is true for all versions or
not) delivers Python as part of the OS.  That is simply not true of the
whole world.  Some OS distributions have an adjunct facility for
installing packages but they are not part of the OS.  Some systems
don't even have that and people must download packages such as Python
and install them manually.  Even on Linux there are people who won't
install binaries and use NetBSD's pkgsrc instead.  Clearly that cannot
install into /usr/bin since it is not part of the OS.

Certainly #! /usr/bin/python is fine if you never expect your software
to run outside of your own little corner of the world but you asked why
people prefer the env version and the answer is that we want to write
software that runs everywhere that Python runs.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From yves at zioup.com  Fri May  2 12:10:34 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 16:10:34 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87fxt0zs92.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <_1HSj.237347$pM4.42390@pd7urf1no>

Thanks everybody, I didn't mean to start a flamewar...
I do get it now, it's whatever python is in the path, vs. the specific one 
you're pointing to.

Ben Finney wrote:

> 
> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.
> 

And I have to admit, I prefer specifying the version (full path) because I 
have run into too many problem when users have different PATHs and end up 
running different version of an interpreter.

Yves.
--
http://www.SollerS.ca


From kyosohma at gmail.com  Fri May 23 09:29:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 06:29:16 -0700 (PDT)
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
Message-ID: <9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>

On May 23, 8:24?am, Gandalf <goldn... at gmail.com> wrote:
> I try to reach a specific wx StaticText element's text and to change
> it by clicking on a button
>
> now let's say the this is my element:
>
> wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>
> And this is my EVT_BUTTON bind function :
>
> def OnClick(event):
>
> which code shude i enter to change "hello" to "goodbay"?
>
> thanks


You're probably looking for SetLabel(). So if you do something like
this to instantiate the StaticText:

self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
style=wx.ALIGN_CENTRE)

Then you can change your text by adding this to your OnClick event
handler:

self.myText.SetLabel("goodbye")

Have fun! And remember, there's a great wxPython mailing list too:

http://www.wxpython.org/maillist.php

Mike


From wizzardx at gmail.com  Sun May  4 14:14:50 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:14:50 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <18c1e6480805041114j1b3448dfj2b86fe3144d77f9c@mail.gmail.com>

On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.dekel at gmail.com> wrote:
> Hi
>  I am trying to create an application that uses some form of input to
>  create a midi file.
>  I would like for this to be a 'real time' process. In other words, I
>  want to be able to begin playing the midi file before I finish writing
>  it, and continue writing as it plays.

Have you tried the MIDI libraries listed on this page?

http://wiki.python.org/moin/PythonInMusic

David.


From wizzardx at gmail.com  Thu May  8 09:36:31 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 15:36:31 +0200
Subject: Parsing Email 'References' header.
In-Reply-To: <18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>
References: <4822F7B6.2000403@gmail.com>
	<18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>
Message-ID: <18c1e6480805080636i590f4a13t2179aac67433e8a1@mail.gmail.com>

>
>  "<.*>(<.*?>)"
>

Doesn't work if there is only one e-mail address:

Here's another one:

"<[^<]+>$"


From hat at se-162.se.wtb.tue.nl  Fri May 16 03:45:37 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 09:45:37 +0200
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>
Message-ID: <slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Venkatraman.S. <venkat83 at gmail.com> wrote:
> Or a better example would be:

Indeed, this is concrete enough to make some suggestions.

> I have the params in a config file and import this module:
> myconfig.py
> a=10
> b=30
> c=31
> d=40

The big problem imho with coding such stuff directly in Python is that you have
no way to extract the data from the code to display it to your users without
exposing them to Python code.

Why not instead throw this in a ConfigParser file like below, and load the data
values from it (each time they have changed?)

[score]
a=10
b=30
c=31
d=40

By picking better names, the config gets much more readable.

The big advantage here is that a config file is something readable and editable
without appearing it to be Python.
If this is too low level for your users, you can use it as a data exchange
format between the processing application and the frontend application where
users can change the values.

> import myconfig
> def checkCutoff(self,up,down):
>        .............do some processing........
>        if (a <= score <= b):
>                 result="Bad"
>        elif (c <= score <= d):
>                 result="Good"
>        .............do some processing........
>        return result
>
> Now when i 'manually' make some changes to the value of a,b,c,d then
> the the checkCutoff func should refer to the new values.

Maybe reload the file each time you run the program?


Sincerely,
Albert


From notnorwegian at yahoo.se  Sun May 25 18:49:16 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 15:49:16 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
Message-ID: <a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>

On May 25, 9:32?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sun, 25 May 2008 00:10:45 -0700, notnorwegian wrote:
> > sets dont seem to be so good because there is no way to iterate them.
>
> Err:
>
> In [82]: for x in set(['a', 'b', 'c']):
> ? ?....: ? ? print x
> ? ?....:
> a
> c
> b
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch


i meant like set[pos], not iterate but access a specific position in
the set.

now i have to do:
s = toSet.pop()
toSet.add(s)

if i want to get the url of the next item in a set, how would i do
that?
i can do this with a list:

def scrapeSitesX(startAddress, toList, listPos):
return scrapeSites(toList[listPos], toList, listPos+1)
to use recursion with a list.
i can work around that but it doesnt get as elegant.


From d3vvnull at gmail.com  Fri May 23 00:50:27 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 22 May 2008 23:50:27 -0500
Subject: php vs python
In-Reply-To: <UTrZj.2635$772.1119@bignews2.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
	<UTrZj.2635$772.1119@bignews2.bellsouth.net>
Message-ID: <170543c70805222150j14365fc6hc96b3948c339d68a@mail.gmail.com>

I used python to generate php code. But that was before I knew what vast
troves of python web frameworks there were. :)

On Thu, May 22, 2008 at 11:40 PM, inhahe <inhahe at gmail.com> wrote:

>
> > PHP can do that.  There are also a number of templating engines
> > available.  The nice thing about PHP is you have a choice.
>
> i just meant that php is sort of invented to combine html and code, so if
> you use python instead you should use a templating engine.  but i suppose
> it's useful for php too.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From byte8bits at gmail.com  Thu May 22 11:45:06 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 22 May 2008 11:45:06 -0400
Subject: problem boost::python::import
In-Reply-To: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>
References: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>
Message-ID: <g144en$3as$1@solaris.cc.vt.edu>

Fr?d?ric Degraeve wrote:
> Hello,
> 
> I tried this code with vs7-8 and boost1.34.1-1.35.0 and my python is a
> 2.4......

Try the boost users list:

To subscribe or unsubscribe via the World Wide Web, visit 
http://lists.boost.org/mailman/listinfo.cgi/boost-users



From castironpi at gmail.com  Tue May 13 10:16:27 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:16:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com> 
	<fb6f276c-24f9-4339-b814-5f2c4f331c59@l17g2000pri.googlegroups.com>
Message-ID: <2108ecb8-ba27-4c97-8f9f-adfe451e10fb@56g2000hsm.googlegroups.com>

On May 13, 9:05?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 13, 7:44?am, castiro... at gmail.com wrote:
>
> > I am not convinced that the colorspace occupies three dimensions necessarily.
>
> Apparently there are some people -- called tetrachromats -- who can
> see color in four dimensions. ?They have extra sets of cones in their
> retinas containing a different photopigment. ?So, the dimensions of
> color appear to be an artifact of our visual systems, and not inherent
> in the colors themselves which are linear (one-dimensional) in
> frequency. ?http://en.wikipedia.org/wiki/Tetrachromacy

My conspiracy theorists know too much.  They would question that
mathematical claim of science, that retinas only detect one dimension
of one force.  Are we asking if something like that is fundamental to
life?  I have been very sceptical about emperical claims, especially
since I just try to render stuff and play Tron.


From sturlamolden at yahoo.no  Fri May 30 06:21:37 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 30 May 2008 03:21:37 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <63757633-e3d7-4d5b-b1c4-160987913990@34g2000hsh.googlegroups.com>

On May 29, 6:07 pm, allendow... at gmail.com wrote:

> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.

You should use new-style classes. It is the default in Python 2.6 and
the only option in 3.0. These releases will be out before your book is
on the market.



From alex_fainshtein at netzero.net  Fri May  2 17:29:57 2008
From: alex_fainshtein at netzero.net (Alex Fainshtein)
Date: Fri, 2 May 2008 14:29:57 -0700
Subject: 'property' builtin does not work for me
Message-ID: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>

Question: what I am doing wrong? Here, I am defining class with property
member:

class Test:

    def getter(self):
        print "Getter called."
        return 'a'

    def setter(self, val):
        print "Setter called."

    prop = property(getter, setter)

Then testing it:

>>> t = Test()
>>> t.prop
Getter called.
'a'
>>> t.prop = 'b'
>>> t.prop
'b'
>>>

As you see, getter works properly. But when assigning to property, setter is
not called, as I would expect. prop is simply replaced with whatever is
assigned and ceased being a property.
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From benjamin.kaplan at case.edu  Sat May 24 16:57:39 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sat, 24 May 2008 16:57:39 -0400
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com>

On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzyman at gmail.com> wrote:

> On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au<bignose%2Bhates-s... at benfinney.id.au>
> >
> wrote:
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
> >
> > From whom are you trying to hide your attributes?
>
> Actually, 'data hiding', although vastly overused by the static crowd
> can be a reasonable thing to want.
>
> For example, at Resolver Systems we expose the spreadsheet object
> model to our users. It hasa public, documented, API - plus a host of
> undocumented internally used methods.
>
> We would really *much* rather hide these, because anything our
> customers start using (whether documented or not) we will probably
> have to continue supporting and maintaining.
>
> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.
>

It apparently works for Sun Microsystems. They do that with a whole bunch of
packages in Java, and Java does allow data hiding.

http://java.sun.com/products/jdk/faq/faq-sun-packages.html


>
> You can make members truly private by proxying, but it is a bit
> ungainly.
>
> Michael Foord
> http://www.ironpythoninaction.com/
>
>
> >
> > In Python, the philosophy "we're all consenting adults here" applies.
> > You shouldn't pretend to know, at the time you write it, all the uses
> > to which your code will be put. Barriers such as enforced "private"
> > attributes will only cause resentment when people, despite your
> > anticipations, *need* to access them and are then forced to hack their
> > way around them.
> >
> > If you want the users of your code to know that an attribute should
> > not be used as a public API for the code, use the convention of naming
> > the attribute with a single leading underscore. This is a string
> > signal that the attribute is part of the implementation, not the
> > interface. The reader is then on notice that they should not rely on
> > that attribute; but they are not *prohibited* from using it if
> > necessary to their ends.
> >
> > > Python advertises himself as a full OOP language, but why does it
> > > miss one of the basic principles of OOP?
> >
> > Who taught you that enforced restrictions on attribute access was a
> > "basic principle" of OO?
> >
> > Perhaps you're confusing the "encapsulation" and "abstraction"
> > principles for enforced access restrictions; they're not.
> >
> > > Will it ever be added to python?
> >
> > I hope not.
> >
> > --
> >  \            "Why was I with her? She reminds me of you. In fact, she |
> >   `\             reminds me more of you than you do!"  -- Groucho Marx |
> > _o__)                                                                  |
> > Ben Finney
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bbxx789_05ss at yahoo.com  Sat May 10 22:37:05 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 10 May 2008 19:37:05 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <87c642fa-2a6c-43c5-a812-27924e689889@34g2000hsh.googlegroups.com>

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>

x = range(10)
print x

--output:--
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]


From arnodel at googlemail.com  Thu May 29 15:12:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 29 May 2008 20:12:15 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
Message-ID: <m2d4n43oxc.fsf@googlemail.com>

Jason <tenax.raccoon at gmail.com> writes:

> On May 29, 10:07 am, allendow... at gmail.com wrote:
>> Hi All,
>>
>> I am working on a revised edition of How To Think Like a Computer
>> Scientist,
>> which is going to be called Think Python.  It will be published by
>> Cambridge
>> University Press, but there will still be a free version under the GNU
>> FDL.
>>
>> You can see the latest version at thinkpython.com; I am revising now,
>> so
>> I welcome all comments, suggestions, corrections, etc.
>>
>> Anyway, I am posting to ask about the current status of new style
>> classes.
>> I am planning to present only one style in the book, because the
>> differences
>> between them don't matter for anything I am doing in the book.
>>
>> The current edition of the book presents old style classes.  I am
>> considering
>> switching to new style classes on the assumption that this should be
>> the default
>> choice for new programs.  The drawback is that a lot of the online
>> documentation
>> still uses old style classes.
>>
>> Thanks for any guidance you can provide.
>>
>> Cheers,
>> Allen
>
> I've got Python 3.0 alpha 2.  In this version, it looks like you can
> define classes in either the old style or new style.  (I snipped the
> top line a bit in the following example):
>
> Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
> Type "help", "copyright", "credits" or "license"
>>>> class one(object): pass
> ...
>>>> class two: pass
> ...
>>>> two
> <class '__main__.two'>
>>>> one
> <class '__main__.one'>
>>>> type(one)
> <type 'type'>
>>>> type(two)
> <type 'type'>
>>>>

Note that you can get the same behaviour in Python 2.2+ by setting the
global variable __metaclass__ to type:

marigold:~ arno$ python
Python 2.5.1 (r251:54863, Jan 17 2008, 19:35:17) 
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> __metaclass__ = type
>>> class Foo: pass
... 
>>> type(Foo)
<type 'type'>
>>> 

-- 
Arnaud


From daveparker at flamingthunder.com  Wed May 21 17:39:43 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 14:39:43 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
Message-ID: <bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>

On May 21, 3:19?pm, "Dan Upton" <up... at virginia.edu> wrote:
> The fact is, sometimes it's better to get it fast and be good enough,
> where you can use whatever methods you want to deal with rounding
> error accumulation.

I agree.

I also think that the precision/speed tradeoff should be under user
control -- not at the whim of the compiler writer.  So, for example,
if a user says:

      Set realdecimaldigits to 10.

then it's okay to use hardware double precision, but if they say:

      Set realdecimaldigits to 100.

then it's not.  The user should always be able to specify the
precision and the rounding mode, and the program should always provide
correct results to those specifications.


From vivainio at gmail.com  Mon May  5 14:41:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:41:01 GMT
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
	<slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>
	<mailman.608.1210012330.12834.python-list@python.org>
Message-ID: <lk2ozj9g.fsf@gmail.com>

Max Erickson <maxerickson at gmail.com> writes:

> The killer application for ISBN lookup on Amazon is checking prices 
> while in the bookstore. Being able to email a photo from your phone  
> and then getting an email with the Amazon price in response would be 
> way easier than typing the isbn into Google or whatever.

Yeah, or just create a S60 python app to do it directly. Basically,
just put up a web service somewhere that allows pushing an image of
the barcode and returns the lowest price for that item, and the PyS60
app will be done in a day.


From wizzardx at gmail.com  Mon May  5 09:09:49 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 15:09:49 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
Message-ID: <18c1e6480805050609n7a65d67amdc83c2b89f8f2271@mail.gmail.com>

Hi Vlasta.

Don't have time to reply to your mail in detail now. Will do so later.

Have you tried the eGenix text tagging library? It sounds to me that
this is exactly what you need:

http://www.egenix.com/products/python/mxBase/mxTextTools/

Disclaimer: I've never actually used this library ;-)

David.


From mnordhoff at mattnordhoff.com  Sun May 25 01:19:49 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sun, 25 May 2008 05:19:49 +0000
Subject: module import problem
In-Reply-To: <200805242359.27995.prudek@bvx.cz>
References: <200805242359.27995.prudek@bvx.cz>
Message-ID: <4838F6F5.5070409@mattnordhoff.com>

Milos Prudek wrote:
> I have a Kubuntu upgrade script that fails to run:
> 
> File "/tmp/kde-root//DistUpgradeFetcherCore.py", 
> line 34, in <module>
> import GnuPGInterface
> ImportError
> No module named GnuPGInterface
> 
> I got a folder /usr/share/python-support/python-gnupginterface with 
> a "GnuPGInterface.py" but no __init__.py.
> 
> In python command line, print sys.path shows that /usr/share/python-support/ 
> is not among python paths.
> 
> If I cd into /usr/share/python-support/python-gnupginterface and launch Python 
> I can "import GnuPGInterface". But when I run DistUpgradeFetcherCore.py in 
> that folder it always fails with No module named GnuPGInterface.
> 
>  I do not know much about setting python path. 

This doesn't help solve your problem, but /usr/share/python-support
doesn't need to be in Python's path because python-support puts symlinks
to it in /usr/share/python*/site-packages.
-- 


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 09:45:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 15:45:38 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
Message-ID: <482d9001$0$24452$426a74cc@news.free.fr>

globalrev a ?crit :
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
(snip)
>>> cust1 = customer.__init__('12',['1','435','2332'])
>> __init__ is automagically called on instanciation, so you don't have to
>> call it yourself. And FWIW, your __init__ returns None.
> 
> what should init return normally?

None. Your __init__ is fine, the problem is with the call. To 
instanciate a class, you call the class object itself, passing it the 
arguments awaited by __init__, ie:


cust1 = Customer('12', ['1', '435', '2332'])


From victorsubervi at gmail.com  Fri May  2 09:38:34 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Fri, 2 May 2008 08:38:34 -0500
Subject: Custom Classes?
In-Reply-To: <1209729679.6589.23.camel@jcd-desktop>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
Message-ID: <4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>

Thank you for your patience. I apologize for so many errors. Also,
apparently your email client renders those double-spaces whereas mine does
not. Hopefully the below is better:

#!/usr/bin/python

import MySQLdb
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()

pic = "pic1"
w = 20
x = 0
d = 6
y = 1
getpic = "getpic" + str(w) + ".py"
try:
  os.remove(getpic)
except:
  pass
code = """
#!/usr/local/bin/python
import cgitb; cgitb.enable()
import MySQLdb
import cgi
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()
form = cgi.FieldStorage()
picid = int(form["id"].value)
x = int(form["x"].value)
pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
pic = pics[x]
db = MySQLdb.connect(host, user, passwd, db)
cursor= db.cursor()
sql = "select %s from products where id='%s';" % (pic, str(picid))
cursor.execute(sql)
content = cursor.fetchall()[0][0].tostring()
cursor.close()
print 'Content-Type: image/jpeg'
print
print content
"""
script = open(getpic, "w")
script.write(code)
# print '<td><input type="hidden" name="%s" value="%s" />' % (str(x),  pic)
# print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d, y)
print '<img src="getpic20.py?id=6&x=1">\n'



Now, on those last 3 lines, I am having trouble with this error being thrown
that I don?t understand:
ValueError: unpack list of wrong size
If I surf to the given url, the image appears! So what gives?? Furthermore,
the code works just fine from where it was lifted.
TIA,
Victor
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From arnodel at googlemail.com  Mon May 19 17:27:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 22:27:06 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
Message-ID: <m2k5hq7zo5.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 19, 11:04?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Paul McGuire <pt... at austin.rr.com> writes:
>>
>> [...]
>>
>> Could you use it as a decoratore instead?
>>
>> integer = Word("0123456789")
>>
>> @integer.setParseAction
>> def parse_integer(tokens):
>> ? ? return int(tokens[0])
>>
>> I could make your grammar clearer, because you don't mix it with
>> processing code... and no need for lambdas!
>>
>> --
>> Arnaud
>
> What a sexy little idiom!  You could really apply this to any API
> method that accepts a callable as a single argument, and pyparsing
> actually has several of these:
>
> setParseAction
> addParseAction
> setFailAction
> setDebugActions
>
> (Unfortunately, setDebugActions requires 3 callables for its arguments
> - one to be run when an expression is about to be parsed, one to be
> run after parsing is complete, and one to be run if the expression
> fails to be parsed.  So setDebugActions can't be used in this
> decorator manner.)
>
> Using these methods as decorators deviates from the typical decorator
> usage model as I understand it - instead of wrapping the provided
> function within some enclosing setup/teardown code (like lock/unlock,
> or open-file/close-file, or begin-transaction/commit-transaction), and
> then returning the created wrapper function, the decorator usage you
> propose is one in which the decorator uses the provided function with
> some side-effect (such as setting a property), but then just returns
> the original function.

I humbly think this is a very good use of decorators; it is one that I
frequently take advantage of and until I read this I had never thought
of it as deviant :).  After all, Python is not a functional language,
functions have side-effects and that's that.

In a way it is more basic than the 'typical' use, i.e.

    # Typical use; mutates defined function 
    @staticmethod
    def foo(bar, baz)...

is shorthand for

    def foo(bar, baz)...
    foo = staticmethod(foo)

Whereas

    # Deviant use; leaves function untouched
    @register
    def foo(bar, baz)...

is shorthand for

    def foo(bar, baz)...
    register(foo)

I am not claiming that it should be a common decorator idiom, only
that I am comfortable with it and find it useful.

> By returning the original function, we could stack decorators so
> that multiple expressions could share the same parse action:
>
> @articleTitle.setParseAction
> @movieTitle.setParseAction
> @bookTitle.setParseAction
> def upcase_title(tokens):
>     return " ".join( t.title() for t in tokens )
>
> Here is where I have something of a hitch, with the way pyparsing
> implements most setXXX methods.  setParseAction already returns a
> value, and the value returned is self.  If you have any Smalltalk
> background, this will seem familiar to you.  (Not that I was ever a
> big-time Smalltalk coder, but this was one language idiom that you
> learned on Day 0.5 or you were lost forever.)  This makes it easy to
> chain together a constructor and multiple property setters into a
> single expression:
>
> timestamp = Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d)
> {2}").setParseAction(convertTimeStamp).leaveWhitespace().setDebug()

I am not a user of pyparsing (yet!), so my comment is completely
uninformed, but I feel that what is gained in brevity by writing it
like this, may be lost in clarity because separate notions are put
together (parsing, processing, debugging).  But if I understand
correctly, I would be able to rewrite this as:

# Grammar section
timestamp =  Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d){2}")

# Processing section
timestamp.setParseAction(convertTimeStamp)
timestamp.leaveWhitespace() # I'm not sure what this does!

# Debugging section
timestamp.setDebug()

OK, now I understand what my problem is: 

    - your existing setXXX methods mutate self and return it, thus
      breaking the quasi-rule that if you mutate something, don't
      return it (c.f. list.sort, etc);

    - your proposed 'decorator-friendly' setXXX methods mutate self
      and return their argument just to satisfy the
      decorator-friendliness constraint, but in spirit they return
      nothing.

This is just a train of thought, and I hope that you won't take this
the wrong way.  I am arguing for the pleasure of it, and I am happy to
lose the argument :)
 
> In the case where we have a single parse action shared by multiple
> expressions, we have to fall back to:
>
> def upcase_title(tokens):
>     return " ".join( t.title() for t in tokens )
> articleTitle.setParseAction(upcase_title)
> movieTitle.setParseAction(upcase_title)
> bookTitle.setParseAction(upcase_title)
>
> But, now that I've looked at this for a while, I may fall back on some
> other idioms:
> - just because you *can* do something doesn't mean you *should* do it
> - explicit is better than implicit

You're (probably!) the best person to judge the syntactical balance of
pyparsing!

> Decorator syntax is already a mysterious topic for many newbies, even
> when used for its normal application.  Using a decorator to perform
> the same function as an explicit "set" call invokes cleverness at the
> cost of clarity.  Using decorators to replace:
>
> def methodX(a,b,c):
>     blah
> methodX = staticmethod(methodX)
>
> with
>
> @staticmethod
> def methodX(a,b,c):
>     blah
>
> does have some merits, including DRY.  But using decorator syntax as
> an implicit invocation of a set method? It's just taking advantage of
> the incidental implementation of the decorator syntax. It would be
> like implementing the logic of a for-loop using a list comprehension -
> clever, and yes it can be done, but maybe a bit obscure.

I understand your comment about list-comprehensions, but I haven't yet
reached the level of Python guru-ness to correlate it to decorators :)

There are more things I would have liked to expand on but
unfortunately I don't have enough time to put my thoughts together in
a communicable manner.

-- 
Arnaud


From martin at v.loewis.de  Thu May  1 14:03:22 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 20:03:22 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A05EA.6080508@v.loewis.de>

> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

You need to add your PyPI password to .pypirc.

Regards,
Martin


From alex.m.gusarov at gmail.com  Wed May 28 13:13:01 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 00:13:01 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
In-Reply-To: <pan.2008.05.27.17.46.08.159260@virgilio.it>
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<pan.2008.05.27.17.46.08.159260@virgilio.it>
Message-ID: <ac6dcb3d0805281013x2197a14u7ffa63924137b163@mail.gmail.com>

> I have a feeling that the form produced by Qt Designer, once converted to
> code, contains references to QCalendarWidget where you really want to use a
> customized calendar widget. If so, you should "promote" the calendar widget
> in Qt Designer to use your widget instead, and make sure you import the
> module that supplies it in your application.

David, thanks for noticing about "promoting" within designer, it helped me.

> Anyway, IIRC (it's a long time since I used Qt), QT allows to connect
>  more than one slot with the same signal, so you should not need to
> subclass or to create your own multi-dispatcher. Just doing:
>
> calendar.paintCell.signal( SOME_SIGNAL_NAME, my_paint_method )
>
> should work. I don't know which signal you should connect to, however.
>
> This link gives you some detail on signal/slots in PyQT:

Thanks, but actually, paintCell is not a signal, it's simply a virtual
method of caledarwidget.

--
Best regards, Alex Gusarov


From tjreedy at udel.edu  Tue May 13 03:16:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 03:16:41 -0400
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<m2skwo2fuj.fsf@googlemail.com><c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com><mailman.1005.1210632251.12834.python-list@python.org>
	<m2lk2eivos.fsf@googlemail.com>
Message-ID: <g0bf8m$sc9$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2lk2eivos.fsf at googlemail.com...
| "Terry Reedy" <tjreedy at udel.edu> writes:
|
| > "Arnaud Delobelle" <arnodel at googlemail.com> wrote in message
| > 
news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...
| >
| > here is a very sophisticated implementation :)
| >
| >>>> def extract(indices, seq):
| > ...     return tuple(seq[i] for i in indices)
| > ...
| >>>> y, d = extract((0, 2), time.localtime())
| >>>> y, d
| > (2008, 12)
| >
| > ===================
| > Or a generator version:
| >
| > # 3.0
| > def extract(iterable, indexes):
| >     # assume indexes are all legal

and in order, I wrote once, but seem to have erased in revising (frown)

| >     enext = enumerate(iterable).__next__
| >     i,item = enext()
| >     for index in indexes:
| >         while i < index:
| >             i,item = enext()
| >         yield item
| >
| > import time
| > print(list(extract(time.localtime(), (0,2))))
| >
| > #prints [2008, 12]
|
| but extract('python', (3, 1)) won't work!






From grayaii at gmail.com  Wed May  7 17:04:30 2008
From: grayaii at gmail.com (grayaii)
Date: Wed, 7 May 2008 14:04:30 -0700 (PDT)
Subject: subprocess wait() waits forever, but os.system returns
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
	<mailman.723.1210193322.12834.python-list@python.org>
Message-ID: <27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>

Awesome! That worked!
And your comment just led me down another exploration path on why the
following doesn't work:
---------------------
while(returncode is None):
	returncode = run.poll()
	time.sleep(1)

out = run.stdout.readlines()
err = run.stderr.readlines()
---------------------
Nowhere in the loop am I reading stdout or err.
I'm only reading it after the loop has finished, and when running the
exe, returncode is *always* None.
Now I have to figure out a way to read it within the loop without
blocking the read... on Windows...

Thinking out loud: Perhaps it would be better to put the subprocess
commands in a separate thread so if my process hangs, I can kill it
after a given time.  Various threads in this forum suggested that
method, so perhaps I should do it that way...


From b0bm00r3 at gmail.com  Sun May 11 02:19:04 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:19:04 -0700 (PDT)
Subject: Keeping two lists aligned after processing
Message-ID: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>

"""
I have a population of five algorithms. Each Alg has a method,
Alg.accuracy(), which calculates its accuracy. Running the accuracy
method on each Alg, I end up with a list of accuracies like [0.75,
0.10, 0.45, 0.80, 0.45]

Now I want to store the algorithms and associated accuracies in a
file, in descending order of accuracy.

Here's how I do it now. There must be a better way! This method is
inelegant, and does not handle at all the issue of what to do with
duplicate accuracies, such as the two different algorithms with 0.45
accuracies in the example above. It merely saves the first of the
duplicates -- not what I want at all.

I want to end up with a file:

0 AlgD 0.80
1 AlgA 0.75
2 AlgC 0.45
3 AlgE 0.45
4 AlgB 0.10

"""

algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
accs=[]
for alg in algs:
   thisacc=getattr(alg.accuracy)()   # picked this technique on
comp.lang.python last month
   accs.append(thisacc)

unsortedaccs=[x for x in accs] # to preserve unsorted
accs.sort()
accs.reverse()   # ending up with sorted list

nuorder=[]
for ax,acc in enumerate(accs):
   spot=unsortedaccs.index(acc)
   nuorder.append(spot)

ofn=open('store.alg','w')
for ord in nuorder:
   alg=algs[ord]
   acc=unsortedlist[ord]
   ofn.write("%d %s,%s" % (ord,alg,str(acc))
ofn.close()



From arnodel at googlemail.com  Sun May 11 16:28:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 21:28:15 +0100
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net>
Message-ID: <m2wsm037s0.fsf@googlemail.com>

John Salerno <johnjsal at gmailNOSPAM.com> writes:

> John Salerno wrote:
>> I know it's popular and very handy, but I'm curious if there are purists
>> out there who think that using something like:
>>
>> for x in range(10):
>>     #do something 10 times
>>
>> is unPythonic. The reason I ask is because the structure of the for loop
>> seems to be for iterating through a sequence. It seems somewhat
>> artificial to use the for loop to do something a certain number of
>> times, like above.
>>
>> Anyone out there refuse to use it this way, or is it just impossible to
>> avoid?
>
> Ok, I think most people are misunderstanding my question a little. I
> probably should have said xrange instead of range, but the point of my
> question remains the same:
>
> Should a for loop be used simply to do something X number of times, or
> should it strictly be used to step through an iterable object for the
> purpose of processing the items in that object?

It makes me feel slightly uncomfortable too, but AFAIK there is no
better way in Python.  What I sometimes do is make the for loop bind
its variable to something useful instead of an unused counter.
Contrived example:

# Print 'hello' 10 times; x is not used
for x in xrange(10):
    print 'hello'

# By changing what is iterated over, no unused variable:
from itertools import repeat
for msg in repeat('hello', 10):
    print msg

-- 
Arnaud


From wuwei23 at gmail.com  Wed May 21 21:05:11 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:05:11 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
Message-ID: <485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>

On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> In case it's not clear what I meant: after executing some_function()
> exception SomeExcpetion gets risen. Then, in except block I do something
> to fix whatever is causing the exception and then I would like to go back
> to try block, and execute some_function() again. Is that doable?

If you know what exception to expect, and you know how to "fix" the
cause, why not just put tests _before_ some_function() is called to
ensure that everything is as it needs to be?


From nagle at animats.com  Tue May 13 13:20:41 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 13 May 2008 10:20:41 -0700
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <mailman.929.1210473312.12834.python-list@python.org>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
Message-ID: <4829cac1$0$34550$742ec2ed@news.sonic.net>

Matt Nordhoff wrote:
> John Salerno wrote:
>> I know it's popular and very handy, but I'm curious if there are purists
>> out there who think that using something like:
>>
>> for x in range(10):
>>     #do something 10 times
>>
>> is unPythonic. The reason I ask is because the structure of the for loop
>> seems to be for iterating through a sequence. It seems somewhat
>> artificial to use the for loop to do something a certain number of
>> times, like above.
>>
>> Anyone out there refuse to use it this way, or is it just impossible to
>> avoid?
> 
> Well, you should use "xrange(10)" instead of "range(10)". 

   CPython really is naive.  That sort of thing should be a
compile-time optimization.

					John Nagle


From Sam.Dutton at itn.co.uk  Sun May 25 15:38:57 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Sun, 25 May 2008 20:38:57 +0100
Subject: where do I begin with web programming in python?
Message-ID: <3F2A6E37-A9C5-4645-BEDA-A8EABB3034E7@mimectl>

This doesn't really answer your question, but you might want to consider Google App Engine.

http://code.google.com/appengine/

Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
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From inhahe at gmail.com  Thu May 22 13:48:29 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:48:29 -0400
Subject: import X vs from x import *
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <ckiZj.78712$%15.31414@bignews7.bellsouth.net>


<notnorwegian at yahoo.se> wrote in message 
news:c8ca75c3-98ab-4c74-8868-b58fbc12a0b2 at m73g2000hsh.googlegroups.com...
> import Tkinter
> from Tkinter import *
>
> i have a program where if i comment out either of those import-
> statements i get an error.
>
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.

the first statement imports tkinter but everything inside of tkinter in 
stored in the tkinter namespace, in other words
if tkinter has a class tk, then tk would be accessed as tkinter.tk. for 
example
import tkinter
blah = tkinter.tk()
if you do from tkinter import *, then everything in tkinter is imported at 
the top level, so it would be
from tkinter import *
blah = tk()






From pistacchio at gmail.com  Mon May 12 04:10:33 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 01:10:33 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
Message-ID: <c1428cc5-bffb-49e3-be67-a76bf565c029@d1g2000hsg.googlegroups.com>

On 12 Mag, 10:10, pistacchio <pistacc... at gmail.com> wrote:
> On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
>
> > On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> > > hi to all!
> > > can i load a module passing to it, automatically and as default, all
> > > the caller's global variables to act as module's global variables?
> > > thanks
>
> > module = __import__('module', globals=globals())
>
> > I think that's what you're looking for.
>
> > - alex23
>
> hmm, well, maybe yes.. should i ovveride the standard import function
> of the module?
> say that the module is called "pycatrix", would adding this to the
> module solve the problem?
>
> def __import__('pycatrix', globals=globals()):

pardon, this:
def __import__('pycatrix', globals=globals()):
    pass


From tinnews at isbd.co.uk  Thu May  1 16:09:31 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 01 May 2008 20:09:31 GMT
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <481a237b$0$654$bed64819@news.gradwell.net>

Carl Banks <pavlovevidence at gmail.com> wrote:
> On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> > On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> >
> > > IMO .ini-like config files are from the stone age. The modern approach is
> > > to use YAML (http://www.yaml.org).
> >
> > You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> > and so comprehensively and completely fails to achieve its stated
> > main goal of being "readable by humans", that I had assumed it
> > was an April Fool along the lines of Intercal or brainf***.
> 
> 
> YAML, ISTM, took a simple concept that worked for small,
> straightforward data, and tried to make into a format that could
> anything anywhere, with disastrous results.  It's not unlike Perl in
> this regard.  It's quite ridiculous.
> 
> 
> My recommendation to the OP would be:
> 
> If you intend to write a GUI that completely sets all the options, use
> XML.  You can bet there are some users who would prefer text editing
> options files, and XML, while not the most readable format available,
> at least gives users the option.
> 
But XML has human unfriendly syntax, is awkward to type, is difficult
to read, what's good about it?  If there's a GUI between you and the
XML then OK, but that wasn't where we were was it?

-- 
Chris Green


From inhahe at gmail.com  Tue May  6 08:36:28 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 6 May 2008 08:36:28 -0400
Subject: select.poll() and WSAPoll
Message-ID: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>

select.poll isn't supported on Windows, because Windows doesn't have such a 
feature, or at least it didn't until Vista.  Vista implements the same thing 
but called  WSAPoll, an article is here 
http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
I hope that the next edition of Python supports select.poll on Vista, or at 
least that someone writes a third-party module fo it. As much as I'd love to 
do it myself, it's probably beyond me.. i've never used poll before nor 
written a Python extension.  also, i don't have Vista.
Thanks





From danb_83 at yahoo.com  Sun May 11 02:35:47 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Sat, 10 May 2008 23:35:47 -0700 (PDT)
Subject: Keeping two lists aligned after processing
References: <3695ddb4-373f-4702-bdb8-4d067778fa7a@e53g2000hsa.googlegroups.com>
Message-ID: <707cec67-1844-499d-95ef-8937bdcf1e1c@v26g2000prm.googlegroups.com>

On May 11, 1:22?am, philly_bob <b0bm0... at gmail.com> wrote:
>
> I have a population of five algorithms. Each Alg has a method,
> Alg.accuracy(), which calculates its accuracy. Running the accuracy
> method on each Alg, I end up with a list of accuracies like [0.75,
> 0.10, 0.45, 0.80, 0.45]
>
> Now I want to store the algorithms and associated accuracies in a
> file, in descending order of accuracy.
>
> Here's how I do it now. There must be a better way! This method is
> inelegant, and does not handle at all the issue of what to do with
> duplicate accuracies, such as the two different algorithms with 0.45
> accuracies in the example above. It merely saves the first of the
> duplicates -- not what I want at all.
>
> I want to end up with a file:
>
> 0 AlgD 0.80
> 1 AlgA 0.75
> 2 AlgC 0.45
> 3 AlgE 0.45
> 4 AlgB 0.10

algs.sort(key=Alg.accuracy, reverse=True)


From george.sakkis at gmail.com  Tue May 13 14:19:32 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 13 May 2008 11:19:32 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>

On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:

> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?

You must be new here. It is an AS (Artificial Stupidity) trolling bot,
you can safely ignore its posts.

>
> On May 13, 9:02 am, castiro... at gmail.com wrote:

<gibberish snipped>


From jkrukoff at ltgc.com  Thu May 15 19:11:22 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:11:22 -0600
Subject: no inputstream?
In-Reply-To: <f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
Message-ID: <1210893082.3312.2.camel@jmk>


On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> >
> > > you're right, my java implementation does indeed parse for Id3v2
> > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > i buffer and parse.  apologies if i misrepresented my code!
> >
> > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > Mutagen/Tutorial) leads me to believe that something like this might
> > > work:
> >
> > > from mutagen.mp3 import MP3
> > > id3tags = MP3(urllib2.urlopen(URL))
> >
> > > but this gives me the following TypeError: "coercing to Unicode: need
> > > string or buffer, instance found".  does this mean i need to convert
> > > the "file-like object" that is returned by urlopen() into a unicode
> > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > complex?  as of now, doing so gives me mostly "No such file or
> > > directory" errors, with a few HTTP 404s.
> >
> > [snip]
> > I think it's expecting the path of the MP3 but you're giving it the
> > contents.
> 
> cool, so how do i give it the path, if not in the form of a URL
> string?  maybe this is obvious...
> --
> http://mail.python.org/mailman/listinfo/python-list

It doesn't look like you can, with mutagen. So, time to find a different
library that supports arbitrary file objects instead of only file paths.
I'd suggest starting here:
http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search

Possibly one with actual documentation, since that would also be a step
up from mutagen.

-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From 42flicks at gmail.com  Tue May 13 17:34:38 2008
From: 42flicks at gmail.com (Mike)
Date: Wed, 14 May 2008 09:34:38 +1200
Subject: feedparser
In-Reply-To: <1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>
	<mailman.1044.1210676785.12834.python-list@python.org>
	<1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>
Message-ID: <2b54d4370805131434i20b84444peee962a8566c0db6@mail.gmail.com>

On Tue, May 13, 2008 at 11:16 PM, <castironpi at gmail.com> wrote:

> On May 13, 6:06 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> > En Tue, 13 May 2008 07:30:44 -0300, Mike <42fli... at gmail.com> escribi?:
> >
> >
> >
> >
> >
> > > I'm trying to use the feedparser module (http://www.feedparser.org/).
> >
> > > Is it possible to use this without running the setup program?
> >
> > > I don't see why not, seems like I'm missing something obvious.
> >
> > > My directory structure is:
> >
> > > myprogram.py
> > >     /feedparser
> > >         /feedparser.py
> >
> > > I know I can install the module in the modules directory but would
> like
> > > to
> > > avoid this for two reasons: I'm only using it for the one project so
> > > would
> > > like to keep it seperate, and if I move to a shared host I may not be
> > > allowed to install additional modules (not sure if this is correct
> > > though).
> >
> > The easiest way would be to put the single module feedparser.py in the
> > same directory as your program (I don't  completely get your reasons not
>
> > to do that). OR put feedparser.py in some other directory that is
> already
> > listed in sys.path. OR add the directory containing feedparser.py to
> > sys.path, just at the beginning of your program.
> >
> > > I've tried:
> >
> > > import feedparser
> >
> > > import feedparser.feedparser
> >
> > > from feedparser import feedparser
> >
> > > What am I doing wrong? :)
> >
> > *IF* the directory 'feedparser' were a package (that is, if it contained
> a
> > file __init__.py), then that last import statement would be valid. But I
>
> > don't reccomend doing this; you're changing the module's environment.
> >
> > --
> > Gabriel Genellina- Hide quoted text -
> >
> > - Show quoted text -
>
>
> I've overlooked the fact there is no _init_.py, I was expecting it to
behave as a package. I'll put the file in my current directory as you
suggested. Thanks for the explanation, it was very helpful and much
appreciated.
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From Lie.1296 at gmail.com  Sun May 18 02:44:18 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sat, 17 May 2008 23:44:18 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com> 
	<e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com> 
	<d24568a8-ce7c-473b-b059-1edf41f6ffee@b64g2000hsa.googlegroups.com>
Message-ID: <8c9a70fb-4f2b-46df-91b0-e979e4221108@u6g2000prc.googlegroups.com>

On May 16, 3:58?am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 15 mai, 19:30, Lie <Lie.1... at gmail.com> wrote:
>
>
>
> > On May 15, 4:08 am, "bruno.desthuilli... at gmail.com"
>
> > <bruno.desthuilli... at gmail.com> wrote:
> > > On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > > > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > > > single language compiler instead of three dimensional compiler that
> > > > > GCC is (cross platform, cross target platform, cross language).
>
> > > > And to add, I also need to mention that Python doesn't need to be
> > > > compiled at all,
>
> > > No language needs compilation - it's an implementation problem, not a
> > > language problem. Now all the Python's implementations I know do use
> > > compilation (to byte-code).
> > > > its py and pyo file is architecture independent.
>
> > > True, but this is not strictly related to being compiled or not.
>
> > It's true, it's implementation problem whether a language is compiled
> > or not, but what I was emphasizing was that Python's code is
> > architecture independent at all stages (that is visible to the user
> > and the programmer), on the other hand, a compiled code is a compiled
> > code is a compiled code,
>
> Ever wondered what all these .pyc files were ?
>
> > it cannot be architecture independent without
> > packing multiple binaries in the same executable (like in Macintosh's
> > universal binary) or using an emulation (with huge overheads) or at
> > least using a compatibility layer (which doesn't always work) and all
> > this is done in the layer that is visible to user and programmer
> > (programmer having to compile against everything and user having to
> > download the correct executable) instead of being done in a platform
> > independent way that interpreted language like Python have.
>
> Python is not interpreted, because being interpreted is a feature of
> an implementation, not of a language. And so far, no known Python
> implementation is (strictly speaking) interpreted - they all compile
> to byte-code. "compiled" doesn't necessarily imply "compiled to
> platform native binary code", you know.

That's beside the point, the point is about platform independentness
of the .py file. When I call Python is interpreted, I meant that the
CPU doesn't directly interpret python codes (in most Python
implementation).

> Ok, this may look like a bit on the splitting hairs side. But may I
> remind you that to run ever a .pyc file, you do need to have the
> Python runtime (VM + quite a lot of libs) installed one way (normal
> install) or another (packed in something that looks like an ordinary
> "executable" - whatever this means for the target platform) ? OTHO,
> it's true that a .pyc file is platform-independant ?- it just requires
> the correct versions of quite a lot of platform-dependant binaries.
> Wait... Isn't this code some kind of a "visible to the user and
> programmer" "compatibilty layer" ?

With the same bit on being on the splitting hair side: It's the same
with msvcrt in C or msvbvm60 in VB, programming language runtime is
invisible to the user, it's visible to the system administrator
(which, in many cases is also the user though). It is, however,
invisible to both the user and the programmers.


From pavlovevidence at gmail.com  Fri May 23 04:07:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 01:07:39 -0700 (PDT)
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
Message-ID: <3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>

On May 22, 10:28 pm, thomas.karol... at googlemail.com wrote:
> Hi,
> I would like to create a Decorator metaclass, which automatically
> turns a class which inherits from the "Decorator" type into a
> decorator.
> A decorator in this case, is simply a class which has all of its
> decorator implementation inside a decorator() method. Every other
> attribute access is being proxied to decorator().getParent().
>
> Here's my attempt:

You got deep stuff going on there, chief, and some of it's wrong.
I'll try to point it out.

> -------------------------------------------------------
> from new import classobj
>
> class DecoratorType(type):
>         def __new__(cls, name, bases, dct):
>                 dct2 = {}
>                 for key, val in dct.iteritems():
>                         dct2[key] = val

First of all, you can just do dct2 = dct.copy().
Second, since you never use dct again, even copying it is unnecessary.


>                 # create a new class which will store all of the implementation
>                 impl = classobj('%sImpl'%name,(),dct2)

classobj creates an old-style class, and I'm pretty sure you don't
want to do that.  To create a new-style class, use type:

    impl = type('%sImpl'%name,(),dct)


>                 # update the old class to implement this implementation
>                 def __init__(self, *args, **dargs):
>                         object.__setattr__(self, '__impl', impl(*args, **dargs))

As your code stands now, object.__setattr__ isn't necessary here; just
using

    self.__impl = impl(*args,**dargs)

should work fine.  I'm guessing you intend to override __setattr__
later?

If you do use object.__setattr__, I suggest that you might want to
call the superclass's __setattr__ instead of object's.  I imagine in
this case the superclass will rarely want to override __setattr__
itself, but in general it's a good idea.  In this particular
circumstance, we don't yet have the class object (it doesn't come till
after calling type.__new__) but we do have the parent class.  So you
might consider changing the definition of __init__ to this:

    basecls = bases[0] if bases else object
    def __init__(self, *args, **dargs):
        basecls.__setattr__(self, '__impl', impl(*args, **dargs))

>                 def decorator(self):
>                         return object.__getattribute__(self,'__impl')

Again, consider changing it to

    def decorator(self):
        return basecls.__getattribute(self,'__impl')

>                 def __getattribute__(self, attr):
>                         if attr=="decorator":
>                                 return object.__getattribute__(self,'decorator')
>                         return getattr(object.__getattribute__(self, 'decorator')
> ().getParent(), attr)
>                 dct = {}
>                 dct['__init__'] = __init__
>                 dct['decorator'] = decorator
>                 dct['__getattribute__'] = __getattribute__
>
>                 return type.__new__(cls, name, bases, dct)
>
> class Decorator(object):
>         __metaclass__ = DecoratorType

Parenthetical: I don't normally recommend this style, since it
obscures the fact that you're using a custom metaclass to the user.
That is something the user probably would benefit from knowing, if for
no other reason than so they can make a mental note about where to
look first if something goes wrong.  I prefer to make the user use the
__metaclass__ attribute.

However, I could see it being desirable for some cases where you're
trying to be as transparent as possible, and indeed it looks as if
that's your goal here.


> class HBar(Decorator):
>         def __init__(self, number):
>                 Decorator.__init__(self)

Ok, at this point you have to ask yourself what you want to do,
because the solution you choose will involve trade-offs.

You will note that Decorator does not define __init__.  In fact,
object.__init__ will be called, which does nothing.  If you think that
all classes with DecoratorType as their metaclass will be a direct
subclass of Decorator, you can get away with not calling
Decorator.__init__ at all.

However, this can cause problems if a user wants to define their own
base class with an __init__ that does something (either by using the
__metaclass__ attribute, or by subclassing a Decorator subclass).  In
that case, you will have to make arrangements to pass the decorator
object to the superclass instead of the decorated.  This can be pretty
hairy, and it beyond the scope of this reply.

To do it completely transparently, your decorated class will probably
have to maintain a reference to its decorator, and will also have to
derive from a base class that delegates any method calls to the
superclass of the decorator.  (Phew.)

That won't be as easy as it sounds.


>                 self._number = number
>         def inc(self):
>                 self._number += 1
>         def p(self):
>                 print self._number
>
> hbar = HBar(10)
> for each in dir(hbar.decorator()):
>         print each
>
> hbar.decorator().p()
> hbar.decorator().inc()
> hbar.decorator().p()
> -------------------------------------------------------
> Unfortunately this does not work. The newly defined __init__ method
> inside __new__, does a call to impl(*args, **dargs). However, since
> the HBar.__init__ calls the Decorator.__init__ method, but the
> HBar.__init__ method no longer resides inside HBar, but rather inside
> HBarImpl (which is no longer a subtype of Decorator), the compiler
> complains that Decorator.__init__ is not being called with a Decorator
> instance as its first argument (which is true).
> I tried changing the definition of impl inside __new__ to have
> Decorator as one of its bases, but then for some reason impl(*args,
> **dargs) asks for 4 arguments (just like __new__) and I have no clue
> as to why that happens.

I believe it's happening because you mixed old-style and new-style
classes.  But it's not the right solution anyway.

> Any help on this?

Probably the best piece of advice is "Don't try to use Decorator
pattern".  :)

Seriously, you might want to see what other people have done in
similar cases.  This stuff is tricky to get right, so maybe you should
shamelessly ride the coattails of someone who already ran into all the
issues.  One example I can think of is the ZODB Persistent class (it's
a proxy class, so some of the same issues are involved).  Perhaps
searching Python cookbook for some proxy or decorator class recipes
will give you ideas.


Carl Banks


From upton at virginia.edu  Mon May 19 23:59:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 19 May 2008 23:59:32 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <5504f9ac0805192059j5d14c6c6sbf12984faf5da3ef@mail.gmail.com>

On Mon, May 19, 2008 at 11:20 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
>
> For another example, I've always preferred languages that are English-
> like because it's easier to return to your code after several years
> and still know what you were doing (and it's easier for someone else
> to maintain your code).
>

Unless of course you use reasonable variable names and have good
comments in your code.  I don't think figuring out well-documented C
code would be any easier if it were in a more English-like
syntax--IMO, it's usually the understanding the interfaces or figuring
out what's going on in functions that makes reading someone else's
code tricky, not the difference between "x=" and "set x to."


From ndbecker2 at gmail.com  Wed May 21 12:54:32 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 12:54:32 -0400
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
	<5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>
Message-ID: <g11k48$iik$1@ger.gmane.org>

marek.rocki at wp.pl wrote:

> Neal Becker napisa?(a):
>> In an earlier post, I was interested in passing a pointer to a structure
>> to fcntl.ioctl.
>>
>> This works:
>>
>> c = create_string_buffer (...)
>> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
>> err = fcntl.ioctl(eos_fd, request, args)
>>
>> Now to do the same with ctypes, I have one problem.
>>
>> class eos_dl_args_t (Structure):
>>     _fields_ = [("length", c_ulong),
>>                 ("data", c_void_p)]
>> ...
>> args = eos_dl_args_t()
>> args_p = cast(pointer(args), c_void_ptr).value
>> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>>
>> That last may fail, because .value creates a long int, and ioctl needs a
>> string.
>>
>> How can I convert my ctypes structure to a string?  It _cannot_ be a
>> c-style 0-terminate string, because the structure may contain '0' values.
> 
> Hello. I'm not completely sure what your problem is ("may fail" is not
> a good description. Does it fail or does it not?). If you want a
> pointer to a structure as the third argument to ioctl, this would be
> imho the easiest way to do it with ctypes:
> 
>> class eos_dl_args_t(Structure):
>>     _fields_ = [("length", c_ulong), ("data", c_void_p)]
>> args = eos_dl_args_t()
>> fcntl.ioctl(fd, request, byref(args))
> 

Seems to be a problem with that:
---> 59 err = fcntl.ioctl(eos_fd, request, byref(args))
     60 

TypeError: an integer is required




From malaclypse2 at gmail.com  Wed May 21 16:44:29 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 21 May 2008 16:44:29 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
Message-ID: <16651e80805211344h3f2a9227n79420dc012d62f06@mail.gmail.com>

On Wed, May 21, 2008 at 4:34 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 12:38 pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
>> >>> a+0.999     # gives expected result
>> 9999999999999998.0
>> >>> a+0.9999   # doesn't round correctly.
>>
>> 10000000000000000.0
>
> Shouldn't both of them give 9999999999999999.0?

My understand is no, not if you're using IEEE floating point.

> I wrote the same program under Flaming Thunder:
>
>     Set a to 10^16-2.0.
>     Writeline a+0.999.
>     Writeline a+0.9999.
>
> and got:
>
>     9999999999999998.999
>     9999999999999998.9999

You can get the same results by using python's decimal module, like this:
>>> from decimal import Decimal
>>> a = Decimal("1e16")-2
>>> a
Decimal("9999999999999998")
>>> a+Decimal("0.999")
Decimal("9999999999999998.999")
>>> a+Decimal("0.9999")
Decimal("9999999999999998.9999")
>>>

-- 
Jerry


From kyosohma at gmail.com  Fri May  9 09:09:37 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 06:09:37 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>

On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??
>
> Thanks
>
> Clive

I have PythonWin installed in my Start Menu --> Programs --> Python
2.5. I may have installed the ActiveState version though. Just check
if it's there on your system and if not, you can follow Niklas's
advice.

Mike



From sturlamolden at yahoo.no  Sun May 18 19:19:03 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 16:19:03 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>

On May 19, 12:20 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:

> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)


Back in the 'old days' of Unix, programs tended not to be small, could
only do one thing, and did it well. They had  no gui, and all
interaction came from command line options. The programs were invoked
from the command line, and input and output were piped from one
program to another (input on stdin, output on stdout).

Today, it is expected that programs should have a GUI. The majority do
not even know how to use a program that does not have one. As a
result, programs have become poorer at interacting with other, and
become bloated and grown monolithic. Today's programs are monolithic
beasts spanning tens or hundreds of megabytes, where the bulk of the
code duplicates functionality found in every other program.

I prefer that a program has no GUI if it does not need user
interaction beyond what can be easily accomplished from the command
line. Sometimes I think gui becomes overwhelming, and obfuscates the
real functionality in the program. When I write program's for others
people, a GUI is usually expected. But when I get requests for adding
new functionality to such a program, it tends to be for unimportant
GUI stuff rather than real functionality to the program.

To answer your question: I only add GUIs when I have to. But because
it seems that people are becoming computer illiterate, incapable of
using a keyboard, and only comfortable with a certain point-and-click
input device, it tends to be most of the time now.








From gpanterov at yahoo.com  Tue May 13 14:39:27 2008
From: gpanterov at yahoo.com (Georgy Panterov)
Date: Tue, 13 May 2008 11:39:27 -0700 (PDT)
Subject: list index out of range
Message-ID: <46657.69485.qm@web50406.mail.re2.yahoo.com>

I am a relatively new python user. I am writing an economic simulation of a card-game. The simulation runs fine for a few iteration but then it gives an error of "list index out of range." 

The strange thing is that it will sometimes run for 10 iterations sometimes for only a few and sometimes won't run at all (seemingly arbitrary). 
Here is some of the code:

for _ in range(100):
    handA=deal_hand(DECK) #deals 2 'hole' cards from a DECK
    handB=deal_hand(DECK) 
    print handA
    print handB
    deal_flop(handA,handB,DECK) #appends 3 cards to handA and handB
    deal_current(handA,handB,DECK) #appends one more card
    deal_rake(handA,handB,DECK) #appends one more card
    DECK.extend(list(set(handA+handB))) #returns the cards to the DECK
    print winner(handA,handB) #returns 0-draw 1 -playerA win, 2-playerB win

The error message is :

['08C', '10H']
['07S', '03C']
--------
['06C', '02H']
['04D', '12S']
--------
['11H', '14S']
['06S', '04S']
--------

Traceback (most recent call last):
  File "G:\Other Stuff\POKER4.py", line 267, in <module>
    handB=deal_hand(DECK)
  File "G:\Other Stuff\POKER4.py", line 13, in deal_hand
    HAND.append(deck[i])
IndexError: list index out of range

In this case it ran 3 times. It will sometimes run for up to 9-10 times. It seems to be arbitrary but I can't get it to run more than 12 times.

Here is the code for the --deal_***-- functions:

def deal_hand(deck):
    HAND=[]
    for _ in range(2):  
        i=random.randint(0,len(deck)) #produces a random card from the deck
        HAND.append(deck[i]) # appends the card to the players' hand list
        deck.remove(deck[i]) #removes the card from the deck
    return HAND

def deal_flop(hand1,hand2,deck):
    for _ in range(3):
        i=random.randint(0,len(deck))
        
        hand1.append(deck[i])
        hand2.append(deck[i])
        deck.remove(deck[i])

I would appreciate any help with this
Thanks
George


Send instant messages to your online friends http://uk.messenger.yahoo.com 


From arnodel at googlemail.com  Tue May 20 03:21:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 08:21:11 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
	<48327914$0$30041$426a74cc@news.free.fr>
Message-ID: <m27idp8mqg.fsf@googlemail.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Paul McGuire a ?crit :
>> On May 19, 11:04 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>> Paul McGuire <pt... at austin.rr.com> writes:
>>>
>>> [...]
>>>
>>> Could you use it as a decoratore instead?
>>>
>>> integer = Word("0123456789")
>>>
>>> @integer.setParseAction
>>> def parse_integer(tokens):
>>>     return int(tokens[0])
>>>
>>> I could make your grammar clearer, because you don't mix it with
>>> processing code... and no need for lambdas!
>>
>> What a sexy little idiom!  You could really apply this to any API
>> method that accepts a callable as a single argument, and pyparsing
>> actually has several of these:
>>
>> setParseAction
>> addParseAction
>> setFailAction
>> setDebugActions
>>
>> (Unfortunately, setDebugActions requires 3 callables for its arguments
>> - one to be run when an expression is about to be parsed, one to be
>> run after parsing is complete, and one to be run if the expression
>> fails to be parsed.  So setDebugActions can't be used in this
>> decorator manner.)
>
> You just have to provide three decorators instead, one for each callback.
>
>>
>> Using these methods as decorators deviates from the typical decorator
>> usage model as I understand it - instead of wrapping the provided
>> function within some enclosing setup/teardown code (like lock/unlock,
>> or open-file/close-file, or begin-transaction/commit-transaction), and
>> then returning the created wrapper function, the decorator usage you
>> propose is one in which the decorator uses the provided function with
>> some side-effect (such as setting a property), but then just returns
>> the original function.
>
> This is already a well-known decorator pattern. It's used in CherryPy
> to mark methods that are exposed as request handlers.

Actually, IIRC the decorator provided by CherryPy is something like
(names are probably wrong, as I haven't looked at CherryPy for a
while):

def exposed(f):
    f.is_exposed = True
    return f

So it doesn't mutate anything else than the function that it
decorates, but changes slightly how the world sees that function.
This is in line with classic decorators such as staticmethod,
classmethod, etc.

-- 
Arnaud


From bockman at virgilio.it  Sun May  4 13:18:42 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 04 May 2008 19:18:42 +0200
Subject: Determine socket family at runtime
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
Message-ID: <pan.2008.05.04.17.18.39.99752@virgilio.it>

On Sun, 04 May 2008 08:49:55 -0700, Giampaolo Rodola' wrote:

> Hi there,
> since the socket.socket.family attribute has been introduced only in
> Python 2.5 and I need to have my application to be backward compatible
> with Python 2.3 and 2.4 I'd like to know how could I determine the
> family of a socket.socket instance which may be AF_INET or AF_INET6.
> Is there some kind of getsockopt() directive I could use?
> For now I've been able to determine the family by using:
> 
> # self.socket = a connected socket.socket instance
> ip, port = self.socket.getsockname()[0:2]
> af = socket.getaddrinfo(ip, port)[0][0]
> 
> ...but I'd like to know if some other solution is preferable.
> 
> 
> 
> Thanks.
> 
> 
> --- Giampaolo
> http://code.google.com/p/pyftpdlib

Ciao,

what about wrapping the socket type and  adding a 'family' attribute
to the base socket class? Something like:

class SocketWrapper(socket.socket):
	def __init__(self, family, type, proto=0):
		socket.socket.__init__(self, family, type, proto)
		self.family = family

then you have just to create the sockets with SocketWrapper insetead of
socket.socket. For the rest of your code it would not matter, and then you 
are sure to always have a .family attribute.

Ciao
----
FB


From lew at lewscanon.com  Sat May 10 17:39:42 2008
From: lew at lewscanon.com (Lew)
Date: Sat, 10 May 2008 17:39:42 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <m1k5i2rupm.fsf@dot-app.org>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
	<IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>
	<m1k5i2rupm.fsf@dot-app.org>
Message-ID: <UNadnSyhW72Ci7vVnZ2dnUVZ_uSdnZ2d@comcast.com>

Sherman Pendley wrote:
> Lew <lew at lewscanon.com> writes:
> 
>> You guys are off topic.  None of the million groups to which this
>> message was posted are about netiquette.
> 
> Netiquette has come up at one point or another in pretty much every
> group I've ever read. It's pretty much a universal meta-topic.

Good, then please have the courtesy not to include comp.lang.java.programmer 
in the distribution for this thread any longer.

-- 
Lew


From donnyf at gmail.com  Thu May  8 21:34:06 2008
From: donnyf at gmail.com (donnyf at gmail.com)
Date: Thu, 8 May 2008 18:34:06 -0700 (PDT)
Subject: Using Python to verify streaming tv/radio station links
References: <d7482731-5b23-4f05-bac7-3c96899711e9@l28g2000prd.googlegroups.com>
	<2e6baf9b-09d3-430e-9e01-cd56ec6e1a33@t54g2000hsg.googlegroups.com>
Message-ID: <8f8eb5ff-f0b4-4123-8185-904f611c3824@m44g2000hsc.googlegroups.com>

On Apr 29, 10:11 am, alexel... at gmail.com wrote:
> Hey!
>
> With regards checking feeds, look into urllib (maybe) and the httplib
> (definitely). They /could/ offer some sort of information regarding
> the activity of your feeds. Without knowing anything about the
> streaming protocols I wouldn't suggest my methods to necessarily be
> the most helpful. You could, at least [maybe], establish whether a
> feed is active if it can return a HTTP 200 response. If that's a
> sufficient check I would suggest that httplib is the place to start.
>
> Alex.

Thanks for the reply.  I'm not so sure that httplib is going to work
as most of these are not http urls.  Here's a handful of examples that
maybe someone could use to give me an idea of how to accomplish what
I'm trying to do.

Here's a list of the various types of media links I have in my
database (all working):

http://www.dradio.de/streaming/dkultur_hq_ogg.m3u
http://200.29.92.21/ucvtv
http://www.ampmedia.org/asx/marina25.asx
http://www.jazz.fm/streaming/JAZZFM91.pls
mms://144.122.56.15/ODTU-TV
rtsp://200.79.7.137/broadcast/tv.rm

The httplib approach may work the http urls, but what about the mms
and rsp 'protocols'?

Please remember that I only know enough to be dangerous and that I'm
much more a hacker than I am a programmer.  As always, any help is
greatly appreciated!


From wizzardx at gmail.com  Sun May  4 08:22:46 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:22:46 +0200
Subject: Script Optimization
In-Reply-To: <18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>
Message-ID: <18c1e6480805040522q4dd36701x69bc83f44f5b8cfa@mail.gmail.com>

Eh, I forgot the attachment.
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From pete.forman at westerngeco.com  Tue May 13 05:45:37 2008
From: pete.forman at westerngeco.com (Pete Forman)
Date: Tue, 13 May 2008 10:45:37 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805080912.29438.onsen-neko@gmx.net>
	<1210244572.6529.5.camel@jcd-desktop>
	<200805081911.47081.onsen-neko@gmx.net>
	<1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
	<mailman.796.1210267635.12834.python-list@python.org>
Message-ID: <r6c6edvi.fsf@wgmail2.gatwick.eur.slb.com>

I would suggest that using an interface at compile time is not the
only approach.  Unit tests can be run on classes to check that they do
indeed quack.
-- 
Pete Forman                -./\.-  Disclaimer: This post is originated
WesternGeco                  -./\.-   by myself and does not represent
pete.forman at westerngeco.com    -./\.-   the opinion of Schlumberger or
http://petef.22web.net           -./\.-   WesternGeco.


From castironpi at gmail.com  Thu May 15 10:07:28 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:07:28 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<482c42d9$0$9669$426a34cc@news.free.fr>
Message-ID: <1fc6c5b4-f4e6-4a1c-8ab0-b07d7f269a66@l42g2000hsc.googlegroups.com>

On May 15, 9:04?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> castironpi a ?crit :
>
> > Why can't I write this?
>
> Because one or more of the "t", "h", "i", "s" keys are missing from your
> keyboard ?

No; they're all here.


From castironpi at gmail.com  Tue May 13 09:44:04 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:44:04 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com>

On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Don't let yourself be irritated by castironpi
>
> I'm not the sort to get irritated by anyone. ?There is value in all
> interaction. ?Flaming Thunder is itself the averaging of interactions
> with many computer languages and conversations with many people, so as
> to create a language that allows people to tell a computer what they
> want it to do, without having to know very much about how the computer
> does it.
>
> On May 13, 3:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > Dave Parker wrote:
> > > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> > >>Yes, I am trying to visualize something.
>
> > > If it is related to making furniture comfortable for humans, have you
> > > considered painting the furniture with thermochromic paint (
> > >http://en.wikipedia.org/wiki/Thermochromism)??It changes color in
> > > response to temperature, which in part is determined by how hard a
> > > body is pressed against it because close contact tends to trap heat.
> > > An evenly distributed color might indicated evenly distributed
> > > pressure.
>
> > Don't let yourself be irritated by castironpi - he's the virtual equivalent
> > of a mumbling mad man in this group. Ignorance serves best as remedy - and
> > getting a filter to work, as I did (so I only see his postings being
> > quoted... a huge relief!)
>
> > Diez- Hide quoted text -
>
> - Show quoted text -

I got hung-up on your sailboat and it took me to coffee.  But I return
empty-handed, and castironpi does not bother me.  All I try to do in
life is write video games.  I am not convinced that the colorspace
occupies three dimensions necessarily.  But I do like sailboats and
furniture.

I am into city planning, roadways, infrastructure, but don't work -
too- hard.  Furniture can be pretty stock and utility on the micro
level--- there's just been runs on the banks before to microize to
certain energy/mass/volume/metabolism levels.  People like stuff and
pull.

If I can get a word in, I also like to distribute economy, and
microize currency.  So long as currency stays current, nobody minds.
Do you need something done... or said?


From mccredie at gmail.com  Fri May  9 19:06:17 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 9 May 2008 16:06:17 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
Message-ID: <d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>

On May 9, 3:19 pm, globalrev <skanem... at yahoo.se> wrote:
> i want to a little stringmanipulationa nd im looking into regexps. i
> couldnt find out how to do:
> s = 'poprorinoncoce'
> re.sub('$o$', '$', s)
> should result in 'prince'
>
> $ is obv the wrng character to use bu what i mean the pattern is
> "consonant o consonant" and should be replace by just "consonant".
> both consonants should be the same too.
> so mole would be mole
> mom would be m etc

>>> import re
>>> s = s = 'poprorinoncoce'
>>> coc = re.compile(r"(.)o\1")
>>> coc.sub(r'\1', s)
'prince'

Matt


From deets at nospam.web.de  Sat May 24 08:43:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 14:43:56 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
In-Reply-To: <mailman.1522.1211630957.12834.python-list@python.org>
References: <mailman.1522.1211630957.12834.python-list@python.org>
Message-ID: <69qgseF31lv3aU1@mid.uni-berlin.de>

Mathieu Prevot schrieb:
> Hi
> 
> I import subprocess and use Popen, but PIPE is not defined. I used
> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
> always the same. What am I missing ?

Without showing code, it's hard to know. A guess is: if you use

import subprocess


then use


subprocess.PIPE

Or if using

from subprocess import Popen

make sure to do

from subprocess import Popen, PIPE

Diez


From mcknight0219 at gmail.com  Wed May 14 21:31:20 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Wed, 14 May 2008 18:31:20 -0700 (PDT)
Subject: create window on panel
Message-ID: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>

Hi, all

I have been trying to use wxPython to design a GUI that will be
displayed on the panel on the top of desktop. that is when the
program starts, it will dwell on the panel to display some dynamic
information.

can anyone tell me in wxPython how to do this? thanks!


From castironpi at gmail.com  Thu May  8 20:29:57 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:29:57 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
Message-ID: <875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com>

On May 8, 4:35?pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> >> The thing is, I'm not using slots by choice. ?I'm using the standard
> >> lib "socket" class, which apparently uses slots.
>
> > `socket` objects can't be pickled. ?Not just because of the
> > `__slot__`\s but because a substantial part of their state lives in
> > the operating system's space.
>
> Of course, if it makes sense to pickle sockets in the application, one
> is can do so by defining __getstate__ and __setstate__:
>
> class Connection(object):
> ? ? def __init__(self, host, port):
> ? ? ? ? self.host = host
> ? ? ? ? self.port = port
> ? ? ? ? self.init_sock()
>
> ? ? def init_sock(self):
> ? ? ? ? self.sock = socket.socket()
> ? ? ? ? self.sock.connect((host, port))
> ? ? ? ? ... init communication ...
>
> ? ? def __getstate__(self):
> ? ? ? ? # pickle self as a (host, port) pair
> ? ? ? ? return self.host, self.port
>
> ? ? def __setstate__(self, state):
> ? ? ? ? # reinstate self by setting host and port and
> ? ? ? ? # recreating the socket
> ? ? ? ? self.host, self.port = state
> ? ? ? ? self.init_sock()

I, local, am mystified that you'd want to pickle a socket.  It's a
live connection, which flies on a pocket dollar.  You don't want it on
disk, do you?

If you're running a net buoy through a cluster somewhere, do you want
to drop a server and reconnect?  Is Amazon's EC2 up and running?

Certainly no one was talking on the internet.  Were you?

I don't think you hit anything but banks surfing the web, and the
American dollar is notoriously stuffy.  Pump a wi-fi to a diner,
though, and you're just talking more.  Where's Usenet?


From inhahe at gmail.com  Sun May 18 06:37:30 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:37:30 -0400
Subject: morning in Python
Message-ID: <IETXj.11283$hv2.3918@bignews5.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
>
>>It is not clear that the first (cheapest best) human->computer language
>>is a computer language, though if two were orthonormal >in comparison
>>to life, Python's fine.  Not my first.
>
> The utterly dry, closed, logical, definitive, hierarchical, consistent, 
> determinate nature of a computer language is the only thing that will 
> facilitate anything useful on something as utterly stupid (and not to 
> mention logical, definite and determined) as a computer.
>
> I mean it, computers are /really/ stupid.  They're literally
> stupider than a bug.  We just like things we can control.
>
> The requisites I have for a computer language are:
>
> Efficiency (speed)
> Elegance of syntax
> Powerful (conceptual-wise) abstractions
>
> Python has delicious abstractions that make doing a lot of things really 
> easy and fun to think about.
> Stackless Python adds even more to that with continuations.
> Also Python's dynamic (another aspect of being powerful conceptual-wise)
> But most of all, I love its syntax.  Guido is the awesome.
> (BTW, I won't even use any language that uses := for assignment.  I just 
> refuse.  I don't care what the language has.)
>
> The speed/efficiency issue depends on the task at hand.  For most things I 
> use Python.  But assembly isn't out of the question, and it's fun to code 
> in.  I also find C/C++ an elegant language.  Most things just don't need 
> that speed.   And Python is 50 times easier to code in than C/C++ and 1000 
> times easier to debug in.
>
> I also like C#.
>
> My ideal language would be a natively compiling cross between C++ and 
> Python.  Objects declared with a type would be statically typed, objects 
> not declared with a type would be dynamically typed.  There would also be 
> keywords to declare that class names won't be reassigned and class 
> attributes won't be deleted.  Those attributes would be referred to by 
> offset, not hast table keys.  f

hast = hash 




From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 08:19:08 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 14:19:08 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
Message-ID: <482d7bbc$0$15491$426a74cc@news.free.fr>

globalrev a ?crit :
> wassup here?
> 
> 
> 7
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> <module>
>     print cust1.getID()
> AttributeError: 'NoneType' object has no attribute 'getID'
> 
> 
> 
> class customer:

1/ naming convention : class names should be CamelCased
2/ unless you need compatibility with years old Python versions, use 
newstyle classes

class Customer(object):

>     def __init__(self, ID, movies):
>         self.ID = ID
>         self.movies = movies

3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants

     def __init__(self, id, movies):
         self.id = id
         self.movies = movies

>     def getID():
>         return self.ID
> 
>     def getMovies():
>         return self.movies

4/ Python has support for computed attributes, so you just don't need 
these getters.

> 
> import os
> import customer
> import movie
> 
> mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> mv1str = mv1.read()
> 
> print mv1str.count(',5,')
> 
> cust1 = customer.__init__('12',['1','435','2332'])

__init__ is automagically called on instanciation, so you don't have to 
call it yourself. And FWIW, your __init__ returns None.

cust1 = Customer('12', ['1', '435', '2332'])

> print cust1.getID()

print cust1.id



From irmen.NOSPAM at xs4all.nl  Mon May 12 05:00:06 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 12 May 2008 11:00:06 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <mailman.963.1210573120.12834.python-list@python.org>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>	<4823268D.1060602@egenix.com>	<c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>
	<mailman.963.1210573120.12834.python-list@python.org>
Message-ID: <4828071a$0$14343$e4fe514c@news.xs4all.nl>

Gabriel Genellina wrote:
>> 2008/5/8 M.-A. Lemburg <mal at egenix.com>:
>>
>>> SOAP would be a good choice if you want to send to data to other
>>> servers as well, e.g. Java-based ones.
>>>
>>> XML-RPC and JSON are better for simple data structures.
>>>
>>> If you have control over both client and server and don't
>>> need to bother with other backends or frontends, Python
>>> pickle is the best choice.
> 
> En Fri, 09 May 2008 05:41:07 -0300, Florencio Cano <florencio.cano at gmail.com> escribi?:
> 
>> I have control over agent and client but I'm not sure how to use
>> pickle for this task. Do you suggest to pickle the objects that I want
>> to send and send it over a usual socket? I have searched a bit in
>> Google and I have seen that Pickle is insecure by default. What do you
>> think about this?
> 
> "insecure" means that someone could build a specially crafted pickle able to run arbitrary code on the unpickling environment. One way to avoid that is to only accept pickles from trusted sources: using SSL by example.
> 

While Pyro (http://pyro.sourceforge.net) uses pickle by default, it is well understood 
that you'll have to deal with a potential security issue if your server is open to 
untrusted/uncontrolled clients.
Pyro provides several things that could help you here:
- you can define a connection authenticator that checks client IP and/or passphrases
- you can switch to an XML based serialisation protocol (courtesy of gnosis tools)
- you can run Pyro over SSL and let SSL deal with authentication/encryption/...

Cheers
Irmen de Jong


From ggpolo at gmail.com  Sat May 10 11:25:41 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 12:25:41 -0300
Subject: People still using Tkinter?
In-Reply-To: <a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
References: <mailman.896.1210396853.12834.python-list@python.org>
	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
Message-ID: <ac2200130805100825p34ceb43asc25286efa2ca2a40@mail.gmail.com>

2008/5/10 Zentrader <zentraders at gmail.com>:
> I like New Mexico Tech's site as well.  Also, take a look at the PMW
> extension for additional widgets, and TkTable and/or TableListWrapper.
> http://infohost.nmt.edu/tcc/help/pubs/tkinter/

There is also Tile, or Ttk since Tk 8.5, if you are interested in
extensions too.
Apparently there are three Tile wrappers now, two are incomplete
(sorry for saying that):

http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
of ttk styling, maybe other things and it is not only a ttk wrapper
(there are other things besides it)
http://bugs.python.org/file10010/Tile.py -- Missing several methods in
Treeview, big part of ttk styling and maybe something else.

And there is also one I'm doing, that I expect to be complete:

http://gpolo.ath.cx:81/projects/ttk_to_tkinter/

Documentation and samples are still lacking, but I'm working on them.
And I haven't tested it under Windows, so I invite you all to test it.

Regards,

-- 
-- Guilherme H. Polo Goncalves


From notbob at nothome.com  Thu May 22 12:29:37 2008
From: notbob at nothome.com (notbob)
Date: Thu, 22 May 2008 16:29:37 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com>
Message-ID: <RbhZj.1158$5u.1067@fe127.usenetserver.com>

On 2008-05-21, Paul Rubin <http> wrote:

> Knowing lots of languages is good for you.  php is probably your
> quickest route to getting a rudimentary web app running.  Python
> is a longer term project.  Do both.

Good advice.  Thank you.

nb


From pavlovevidence at gmail.com  Wed May 14 15:35:17 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 14 May 2008 12:35:17 -0700 (PDT)
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com> 
	<mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <7d28fc5b-4027-448a-bbff-b92b7aa149f2@x41g2000hsb.googlegroups.com>

On May 14, 11:07 am, Nikhil <mnik... at gmail.com> wrote:
> Christian Heimes wrote:
> > Ian Kelly schrieb:
> >> The purpose of obj.__len__() is to implement len(obj), which simply
> >> calls it.  So obj.__len__() may be faster, but only marginally.  The
> >> reason to prefer len(obj) is that if you inadvertently pass an object
> >> that does not implement __len__, you get the more appropriate
> >> TypeError rather than an AttributeError.
>
> > len(obj) is faster than obj.__len__() for several types like str. In
> > general len() is as least as fast __len__(). len() also does some extra
> > sanity checks.
>
> > python2.5 -m timeit "'abc'.__len__()"
> > 1000000 loops, best of 3: 0.453 usec per loop
>
> > python2.5 -m timeit "len('abc')"
> > 1000000 loops, best of 3: 0.292 usec per loop
>
> > Common code paths are already highly optimized. Don't try to be clever
> > unless you really understand what happens inside the interpreter. The
> > __internal__ methods are called magic methods for a reason. ;)
>
> > Christian
>
> Thanks for the useful insight.
> Then why to have __len__() internal method at all when the built-in
> len() is faster?
> I heard, in Python3, this internal method is being pruned/renamed to
> something else? Can someone please shed light here?

My advice is to think of len() as an operator.  Like other operators,
it can be overloaded using the __opname__ syntax:

-x calls x.__neg__
x+2 calls x.__add__
len(x) calls x.__len__

It's not really an operator: it's a regular built-in function, has no
special syntax, and no opcodes associated with it, but in sometimes it
helps to think of it as one.


Carl Banks


From conrad at lewscanon.com.invalid  Sun May 25 23:28:50 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Sun, 25 May 2008 23:28:50 -0400
Subject: blogs, longbets.org, and education of sociology
In-Reply-To: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <x8udnUDt0YLvs6fVnZ2dnUVZ_uidnZ2d@comcast.com>

xahlee at gmail.com wrote:
> For about the past 10 years, i [sic] have been 

saying things like

> ... fart ignorant ..., often in a
> irresponsible and carefree way.
...
> Some of these beer drinking f**kheads are simply being a asshole,
...
> vandalism. (the tech geekers use in-group slang for this: ?troll?.)

Actually, it's argot, not slang.  The definition is fairly narrow and well 
understood.

more obscenity:
> technology. (note: not reading more motherf**king slashdot or
> motherf**king groklaw or more great podcasts on your beatific language
> or your postmodernistic f**khead idols)

And the temerity of:
> (One thing you can do, is actually take a course on philosophy,
> history, law, economics, in your local community college.)

Yeah, those bastions of intellectual elitism.

Plonk, plonk, plonk.

-- 
Lew


From notnorwegian at yahoo.se  Mon May 19 18:28:48 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 15:28:48 -0700 (PDT)
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
Message-ID: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>

' '.join([`x  x` for x in range(1, 6)])

anyone can tell me what im doing wrong?


From gandalf at shopzeus.com  Mon May 12 02:42:01 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 12 May 2008 08:42:01 +0200
Subject: Is there no single/uniform RDBMS access API module for Python
 ?
In-Reply-To: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
Message-ID: <4827E6B9.3080509@shopzeus.com>

Banibrata Dutta ?rta:
> Hi,
>  
> Again a noob question.
>  
> Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is 
> it correct to conclude that there is no RDBMS agnostic, single/uniform 
> DB access API for Python ?
> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>  
> How is the RDBMS change handled for solutions which need to work with 
> different RDBMSs ??
http://www.python.org/dev/peps/pep-0249/



From skanemupp at yahoo.se  Mon May  5 07:09:53 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 04:09:53 -0700 (PDT)
Subject: pygame music, cant read mp3?
Message-ID: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>

http://www.pygame.org/docs/ref/mixer.html

import pygame

#pygame.mixer.init(frequency=22050, size=-16, channels=2,
buffer=3072)  //it complained abiout words=
so i guess its only the nbrs should be there//

pygame.mixer.init(22050, -16, 2, 3072)
pygame.mixer.music.load("example1.mp3")
pygame.mixer.music.play(loops=1, start=0.0)



Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
<module>
    pygame.mixer.music.load("example1.mp3")
error: Couldn't read from 'example1.mp3'


From gherron at islandtraining.com  Sun May 18 14:45:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 18 May 2008 11:45:32 -0700
Subject: Compress a string
In-Reply-To: <op.ubc28kc14fd8pl@mp1206-hp.config>
References: <op.ubc28kc14fd8pl@mp1206-hp.config>
Message-ID: <4830794C.4030309@islandtraining.com>

Matt Porter wrote:
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt

This is shorter and perhaps clearer:

def compress_str(str):
   new_str = ""
   for c in str:
     if not new_str  or  c != new_str[-1]:
       new_str += c
   return new_str


However, successive appends to a string is inefficient (whereas 
successive appends to a list are ok), so this is probably more efficient:

def compress_str(str):
   r = []
   for c in str:
     if not r  or  c != r[-1]:
       r.append(c) # Build a list of characters
   return ''.join(r)#  Join list into a single string


And then building a list in a loop is usually more efficient (and 
perhaps clearer) if done with a list comprehension:

  new_str = ''.join([c for i,c in enumerate(str)   if not i or str[i-1] 
!= c])

or, maybe clearer as two lines:

  r = [c for i,c in enumerate(str)   if not i or str[i-1] != c]
  new_str = ''.join(r)


Gary Herron








From gherron at islandtraining.com  Fri May  9 10:45:33 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 09 May 2008 07:45:33 -0700
Subject: Grabbing previous iteration in a dict
In-Reply-To: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>	<7xabizkdui.fsf@ruckus.brouhaha.com>
	<254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
Message-ID: <4824638D.6080302@islandtraining.com>

dannywebster at googlemail.com wrote:
> On May 9, 10:48 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>   
>> dannywebs... at googlemail.com writes:
>>     
>>> I have a dictionary of which i'm itervalues'ing through, and i'll be
>>> performing some logic on a particular iteration when a condition is
>>> met with trusty .startswith('foo').  I need to grab the previous
>>> iteration if this condition is met.  I can do something with an extra
>>> var to hold every iteration while iterating, but this is hacky and not
>>> elegant.
>>>       
>> You cannot rely on the elements of a dictionary being in any
>> particular order (dicts are internally hash tables), so the above
>> is almost certainly ont what you want.
>>     
>
>
> Hi - thanks for your reply.  How about if I made the dict into a list
> (of
> which I have done).  How would I then reference the previous item?
> Can they
> be indexed?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Yes:

listOfItems = DICT.items()
for i in range(len(listOfItems)):
    k,v = listOfItems[i] # Current key,value pair
    if whatever:
        kPrev,vPrev = listOfItems[i-1]   # Previous key,value pair

Still, since there is no proscribed order in which the items are placed 
into the list, I wonder how this can be useful.   However, this *does* 
do what you asked.

Gary Herron



From castironpi at gmail.com  Fri May 16 15:04:30 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 12:04:30 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>

On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
>
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?- Hide quoted text -
>
> - Show quoted text -

What advantages do teams have? in what? over who? when?  If they have
any use at all,
what language is good for them?  How do programming teams interact?
It sounds fun.  I'm not sure I want to get work done so much as talk,
but programming is fun.

I'd start to discuss state property in appertanance to city property.
What are some properties of the state?

You would have to introduce a computer to a (finite?) way of
expressing language, provided it *expresses* at rates over time that
do not exceed its input (impression), and limited by the complexity
bound of the architecture.  Tangent: architecture complexity.

In order to recreate 'propositional knowledge', you have to tell it.
Accumulating could amount to hashing video feed over time.  What do
you know about what's on the screen?  Naturally, as symbols are
logical, the video would have to be of something you want from it,
even if it's high spirits.

I am less concerned about the audio, but maybe video is just one way
of learning.  What information do the mic inputs convey from a spoken
voice?  (And how do you summarize that?)

And what results are on video summaries are there so far?  I would
start with difference primitives on video.  How does the same work for
voice?

Of course, human understanding may come across the difference in form
of artifacts of hardware, but of course, the crossing operation is non-
trivial to perform, audio and video.  I'm not mentioning smell because
crossing it sounds risky.  Whaddya know.

Now creation and recreation *decompose* into creation and time, spec.
real iteration., but where I'm from, creation and time are known to
cross means; if I have inferred correctly so far, you want a computer
to recreate.  If so, you want creation in act to tell a story.  I
think it's more fun to make them up than tell computers, and if we're
by them, can we tell a story on a newsgroup?  Who understands best in
the cross-sum of { Newsgroup, Newsgroup + task, Computer }?  Who wants
to define cross-sum?


From wizzardx at gmail.com  Sun May  4 14:09:37 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:09:37 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
	<eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
Message-ID: <18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>

> What I want is display a window with a image, the user select a region of
> the image, and the region value is passed to my program, my program slice
> the image region, and analyze it.
>

If it's your apps own window, then getting a rectangle selected by the
user is simple.

1) Make skeleton x/gtk/wx/qt/etc app
2) Add code to show an image
3) Add code to capture mouse events
4) Add code to show the 'rubber band' rectangle over the mouse selection area
5) When the user releases the mouse, then extract the part of the
rectangle between where a mouse button was clicked and where it was
released.

All this would be in the docs for the Python x/gtk/wx/qt/etc libs.
Where is the difficulty?

David.


From mensanator at aol.com  Sun May 11 01:48:43 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 22:48:43 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com> 
	<da405010-4318-4f3e-9f33-001a4edcb662@k10g2000prm.googlegroups.com>
Message-ID: <d7837f5f-377e-4d9c-a696-963165648d5e@c58g2000hsc.googlegroups.com>

On May 11, 12:04?am, John Machin <sjmac... at lexicon.net> wrote:
> On May 11, 1:24 pm, Mensanator <mensana... at aol.com> wrote:
>
>
>
>
>
> > On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
>
> > >http://reddit.com/r/programming/info/18td4/comments
>
> > > claims people take a lot of time to write a simple program like this:
>
> > > "Write a program that prints the numbers from 1 to 100. But for
> > > multiples of three print "Fizz" instead of the number and for the
> > > multiples of five print "Buzz". For numbers which are multiples of
> > > both three and five print "FizzBuzz".
>
> > > for i in range(1,101):
> > > ? ? if i%3 == 0 and i%5 != 0:
> > > ? ? ? ? print "Fizz"
> > > ? ? elif i%5 == 0 and i%3 != 0:
> > > ? ? ? ? print "Buzz"
> > > ? ? elif i%5 == 0 and i%3 == 0:
> > > ? ? ? ? print "FizzBuzz"
> > > ? ? else:
> > > ? ? ? ? print i
>
> > > is there a better way than my solution? is mine ok?
>
> > Define better.
>
> > >>> f = ['','','Fizz']*100
> > >>> b = ['','','','','Buzz']*100
> > >>> for i in xrange(1,100):
>
> > ? ? ? ? fb = f[i-1]+b[i-1]
> > ? ? ? ? if fb=='':
> > ? ? ? ? ? ? ? ? print i
> > ? ? ? ? else:
> > ? ? ? ? ? ? ? ? print fb
>
> You seem to have an unfortunate fixation on 100. Consider changing the
> above instances to 34, 20, and 101.

Ok, I agree with 101, but I wouldn't necessarily
say the others were unfortunate. You might be
surprised at how often such fixations discover
bugs, something that I have a gift for.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 08:46:42 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 14:46:42 +0200
Subject: merging the global namespaces of two modules
In-Reply-To: <mailman.1469.1211449697.12834.python-list@python.org>
References: <mailman.1469.1211449697.12834.python-list@python.org>
Message-ID: <48356b20$0$19726$426a74cc@news.free.fr>

Fabrizio Pollastri a ?crit :
> Hi,
> 
> just an import problem:
> a program imports two modules, modA and modB, each module do not known 
> anything about the other module (i.e. no cross imports in them), both 
> modules needs to refer to some functions that are defined in the global 
> namespace of the other module. 

IOW, you have a circular dependency between modA and modB.

> There is a possible solution? 

The obvious one : extract the relevant functions from modA and modB into 
modC and import modC in both modA and modB.

If not applyable in your case, please provide more informations.



From ivan.illarionov at gmail.com  Sun May 25 17:30:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 21:30:19 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
Message-ID: <g1clpb$1pu0$1@news.mtu.ru>

On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
> Not at all.  I do it every day.
> 
> And BTW - yes, I write Python, also.  But I find I can write better,
> faster code in PHP.

I find I can write better code in Python. Maybe it's just a matter of 
personal preference?

> Do you write PHP?
I did. And I hated it very much. I hated it so much that even I had few 
Python scripts that generated PHP for me when it was possible.



From arnodel at googlemail.com  Mon May 19 12:04:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 17:04:58 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
Message-ID: <m2r6by8el1.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

[...]

> lambda is handy in defining parse actions in pyparsing.  Parse actions
> are callbacks to be run when an expression within a larger grammar is
> matched.  A common use for parse actions is to do some sort of text or
> type conversion.  The simplest parse actions are called using the list
> of matched tokens.  Here is a subexpression that will convert numeric
> strings found in a larger grammar to ints:
>
> integer = Word("0123456789").setParseAction(lambda tokens:
> int(tokens[0]) )

Could you use it as a decoratore instead?

integer = Word("0123456789")

@integer.setParseAction
def parse_integer(tokens):
    return int(tokens[0])

I could make your grammar clearer, because you don't mix it with
processing code... and no need for lambdas!

-- 
Arnaud


From thorsten at thorstenkampe.de  Fri May  2 13:55:04 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Fri, 2 May 2008 19:55:04 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <MPG.228573de113b22d798975b@news.individual.de>

* Ben Finney (Sat, 03 May 2008 00:37:45 +1000)
> Thorsten Kampe <thorsten at thorstenkampe.de> writes:
> > * Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> > > The OP was asking why people prefer on over the other. My answer
> > > is that I prefer specifying "give me the default OS Python"
> > > because anything not installed by the OS is to non-standardised
> > > for me to worry about.
> > > 
> > > Others may prefer something different, but then they get to wear
> > > whatever problems occur as a result of that choice. I continue to
> > > be bemused by that preference, and nothing that I've seen so far
> > > in this thread illuminates the issue more.
> > 
> > You're missing the point. Apart from the really dubious terms you
> > use ("OS installable package"), using env in the first line has
> > exactly the effect to use the default path of Python (which is the
> > first entry in your path)
> 
> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.

Again you're missing the point. If you or whoever installs Python (or 
another version of Python) to /usr/local/bin and puts this in the path 
to front (as it's often done) then /you/ want that Python to be the 
"default" one. It would just be silly to say "no, I the developer want 
/usr/bin/python".

So in general "#! env" is better while in certain circumstance 
hardcoding the path to /usr/bin/python can be better.


Thorsten


From miller.paul.w at gmail.com  Mon May 26 15:38:28 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:38:28 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org>
Message-ID: <c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>

I forgot to ask: what's your target platform?  I mentioned Organizer's
Database, but it only runs on Windows.  If you need a Linux or OS X
solution, then I can make another suggestion. :-)



From aahz at pythoncraft.com  Sun May 18 00:37:40 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:37:40 -0700
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0obqk$cus$1@panix3.panix.com>

In article <bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com>,
Rajarshi  <rajarshi.guha at gmail.com> wrote:
>
>Is there any list with people/groups/companies using Python for
>impressive things?
>
>Any pointers would be appreciated

And one more:

http://www.pythonology.com/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From celoserpa at gmail.com  Fri May  9 10:30:42 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Fri, 9 May 2008 11:30:42 -0300
Subject: Newbie to python --- why should i learn !
In-Reply-To: <83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>
Message-ID: <1e5bcefd0805090730i5f5905dcrcd0f0792b2b94f0e@mail.gmail.com>

I sincerely think that most languages in existence today have its place.
Java has some great libraries and programs that were written in it. Try
writing an Eclipse clone in Python, I don't think it would go well.



On Fri, May 9, 2008 at 11:08 AM, hdante <hdante at gmail.com> wrote:

> On May 8, 7:25 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
> wrote:
> > Hi,
> >
> > i was reading/learning some hello world program in python.
> > I think its very simillar to Java/C++/C#. What's different (except
> > syntax) ?
>
>  All the languages have similar "power", in a theoretical sense. If
> you can solve a problem with one, most of the time you'll be able to
> solve it with the other. So we could say that the languages are
> "equal".
>
>  However, in practice, the syntax matters a lot. For example, they
> will influence on the maintainability and the performance of your
> application.
>
> >
> > what can i do easily with python which is not easy in c++/java !?
>
>  Pretty much everything. Python syntax is minimalist, so it requires
> much less code. There are many examples in Wikipedia, for example:
>
>
> http://en.wikipedia.org/wiki/User_datagram_protocol#Sample_code_.28Python.29
>  http://pt.wikipedia.org/wiki/Radix_sort#C.C3.B3digo_em_Java
>  http://en.wikipedia.org/wiki/Observer_pattern#Python
>
>  etc.
>
> >
> > Tnx,
> > Raxitwww.mykavita.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From gagsl-py2 at yahoo.com.ar  Thu May 15 22:19:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 23:19:08 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
Message-ID: <op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 22:44:17 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> @Gabriel: I understand what you are saying. It all depends on what you  
> want
> to test. In this case, I wanted to test the algorithm of the method.  The
> test_generate_chat_dir_string is meant to do just that: Check if the
> generate_chat_dir_string generated a "valid" (according to the specs)  
> string
> for a "chat dir name".

That depends on what you consider "valid". Just duplicating the function  
code in the test is absurd and pointless. Of course it will pass now -  
you're executing the same code! On the other hand, what if you later want  
to replace the algorithm and use SHA1 instead of md5? The test will fail  
then - but do you *actually* care whether it actually returns the md5  
digest or something else?
If you *do* care, then you should compute the output by hand (or assume it  
is correct *now*) and hard code THAT string in the test, not recompute it  
again.
If you *don't* care, then follow the steps I outlined in the previous  
message: just ensure that different inputs give different outputs.

> It is not a integration nor a functional "unit" test, but it is a "real"
> unit test in the sense that I created a test for each method and I  
> exercised
> the methods the following way:
>
>  1) Got some data to test and...
>  2) ... Generated an output "manually" in the test method that I knew  
> were
> the expected return of the tested method;
>  3) Fed this data to the tested method and compared the manually  
> generated
> result with the return value of the method.
>
> It is like testing a method that does a simple division:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = 5
>   self.assertEquals(mathprogram.divide(dividend,divisor),5)

Mmm, no, your posted example was more like this:

def test_divide
    divdend = 10
    divisor = 2
    expected_result = dividend/divisor
    self.assertEquals(mathprogram.divide(dividend,divisor), 5)

You *computed* the expected result using (presumably) the same code as the  
tested function.

> The techniques you explained in your message sound more like functional
> testing or integration + functional testing where multiple aspects of a
> single functional unit are being exercised. Or am I wrong?

I'd say they are still unit tests. I'm testing a single function,  
comparing the expected output with the actual output. But I only check the  
*public* interfase of the function, what their users expect from it (its  
contract, if you want); I don't check the internal implementation.
The real value of unit tests comes when you want to modify something, or  
reimplement it. You must ensure that you don't break other things. With a  
too strict test very tied to the current implementation, you can't change  
anything.

-- 
Gabriel Genellina



From mathieu.prevot at ens.fr  Wed May 28 09:06:42 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Wed, 28 May 2008 15:06:42 +0200
Subject: Flash Decoder
In-Reply-To: <d9cc94780805280516h6db1300cg5fcf4bb068b37075@mail.gmail.com>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
	<0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
	<3e473cc60805280511o6cf0e639lfdfc2d1ea8902300@mail.gmail.com>
	<d9cc94780805280516h6db1300cg5fcf4bb068b37075@mail.gmail.com>
Message-ID: <3e473cc60805280606g5661dbddocc23012c64079764@mail.gmail.com>

2008/5/28 ankit anand <ankitanand1986 at gmail.com>:
> hmm i am more interested in .swf format and more specifically i would like
> to have all the pixel values of all the frames can i do that using this
> library?

Not with ffmpeg. You can check out the code from Gnash [1] or Swfdec
[2] or start you swf decoder from scratch using Adobe specification
[3] on the swf format.

Happy coding !
Mathieu

[1] http://en.wikipedia.org/wiki/Gnash
[2] http://en.wikipedia.org/wiki/Swfdec
[3] http://www.adobe.com/devnet/swf/


From ZeeGeek at gmail.com  Sun May  4 11:59:05 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Sun, 4 May 2008 08:59:05 -0700 (PDT)
Subject: default gettext localedir on windows
Message-ID: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>

Hi, what's the default localedir for gettext module on windows? In
Linux, it's /usr/share/locale. Where should I put the *.mo file in
order to make the translation work?

Thanks.


From tjreedy at udel.edu  Fri May  9 15:35:12 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:35:12 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
Message-ID: <g0291d$g8d$1@ger.gmane.org>


"Lou Pecora" <pecora at anvil.nrl.navy.mil> wrote in message 
news:pecora-DFE713.11234209052008 at ra.nrl.navy.mil...
| In article <mailman.825.1210293599.12834.python-list at python.org>,
| "Terry Reedy" <tjreedy at udel.edu> wrote:
|
| > "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message
| > news:200805081914.06459.kyrie at uh.cu...
| > | Btw, there seems to be a math problem in python with 
exponentiation...
| > | >>> 0**0
| > | 1
| > | That 0^0 should be a nan or exception, I guess, but not 1.
| >
| > a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
| > But there are unenlighted people who agree with you ;-)
| > Wikipedia has a discussion of this.
| >
| > tjr
|
| I like that argument better.  But...
|
| I've also heard the very similar a**b is a multiplied by a b-1 times.

Me too, in school, but *that* definition is incomplete: it excludes b=0 and 
hence a**0 for all a.  It was the best people could do before 0 was known.
But 0 was introduced to Europe just over 800 years ago ;-)

In general, sequence reduction work better if the base case is given 
separately rather that defined as the first member of the sequence (which 
excludes empty sequences!).
ab = [a]*b # b a count
a**b  = reduce(int.__mul__,  ab, 1) # better
a**b = reduce(int.__mul__, ab[1:], a) # crashes for b=0

Consider the equivalent pair of definitions for a*b:
a*b = 0 incremented by a, b times = reduce(int.__add__, ab, 0)
a*b = a incremented by a, b-1 times = reduce(int.__add__, ab[1:] a)

Since we have 0, the second, which excludes (crashes on) a*0 ,
is incomplete.

Terry Jan Reedy





From deets at nospam.web.de  Fri May 23 05:53:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 11:53:32 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
Message-ID: <69nigsF3499pqU2@mid.uni-berlin.de>

Jimmy schrieb:
> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>> Jimmy wrote:
>>> Hi to all
>>> python now has grown to a versatile language that can
>>> accomplish tasks for many different purposes. However,
>>> AFAIK, little is known about its ability of kernel coding.
>>> So I am wondering if python can do some kernel coding that
>>> used to be the private garden of C/C++. For example, can python
>>> intercept the input of keyboard on a system level? someone told me
>>> it's a kernel thing, isn't it?
>> http://wiki.python.org/moin/elmer
> 
> well, straightly speaking, how can I know a key is pressed on a system-
> level if
> using python?

What has that todo with kernel programming? You can use e.g. pygame to 
get keystrokes. Or under linux, read (if you are root) the keyboard 
input file - I've done that to support several keyboards attached to a 
machine.

And the original question: no, python can't be used as kernel 
programming language. Amongst other reasons, performance & the GIL 
prevent that.

Diez


From jstucklex at attglobal.net  Sun May 25 17:09:43 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 17:09:43 -0400
Subject: php vs python
In-Reply-To: <g1cjnb$1p57$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
Message-ID: <Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
> [...]
>> A quick look at the revision log:
>>
>> http://byteflow.su/log/
>>
>> reveals that the initial commit of 60 or so files has been done on
>> 08/14/07
>> (10 months ago), a second developer came on board 12/01/07 (seven+
>> months ago),
>> a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
>> (also
>> six+ months ago).  There are at least nine discernible contributors
>> overall.
>> Say what you will, but it still looks an awful lot like like two man-
>> years,
>> Django or no Django...
> 
> I bet that if they did this with PHP framework they where far from where 
> they are now.
>

Yep, I'd bet they would be much further along.

> I didn't say that it's not possible to write good code in PHP, I said 
> that Python and Django encourage cleaner code more than PHP and PHP 
> frameworks do. 
> 

I repeat.  The language has nothing to do with it.  Good programmers 
write good code.  Lousy programmers write bad code.

> IMHO Python language is better designed and this influences everything 
> written in it.
>

A lot of people don't share the opinion that it is "better designed".

> Yes, it's possible to write something clean in PHP but it would require a 
> lot more work.
> 

Not at all.  I do it every day.

And BTW - yes, I write Python, also.  But I find I can write better, 
faster code in PHP.

Do you write PHP?

> Ivan
> 
> 


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From hdante at gmail.com  Tue May  6 10:17:15 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 07:17:15 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <486da6f2-d1be-4637-af5f-01d5924ced04@2g2000hsn.googlegroups.com>

On May 6, 10:44?am, jmDesktop <needin4mat... at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces. ?Is
> that correct? ?Is my schooling for nought on these OOP concepts if I
> use Python. ?Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.) ?I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost. ?Thank you.

 Python supports interfaces. In the example below, "Vehicle" is an
interface.

class Vehicle:
     def drive(self, count): raise Exception("I'm only an
interface... :-(")
     def number_of_wheels(self): return 0
     def fly(self): pass

class Car(Vehicle):
     def drive(self, count): print "The car walked %d steps" % count
     def number_of_wheels(self): return 4

 As you can see, there are a couple of ways you can tell others
"Vehicle" is an interface, like raising exceptions, returning useless
values or doing nothing. You could also raise an exception in
Vehicle.__init__.



From hniksic at xemacs.org  Fri May  9 05:38:56 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 09 May 2008 11:38:56 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de>
	<8763tofpiv.fsf@mulj.homelinux.net>
	<68i084F2su97jU4@mid.uni-berlin.de>
Message-ID: <87y76jx1e7.fsf@mulj.homelinux.net>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

>> Of course, if it makes sense to pickle sockets in the application, one
>> is can do so by defining __getstate__ and __setstate__:
>
> When does it make sense!?

When recreating the object from on-disk state requires reestablishing
the communication, as the example shows.  I'm not saying that doing
that is always a good idea, only that it can be done if/when needed.

> But if you unpickle it while the original connection is still open it
> can't connect.

Why not?  I was thinking "client socket", not "server socket".


From ptmcg at austin.rr.com  Tue May 20 11:54:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 08:54:39 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<m2tzgt6m4n.fsf@googlemail.com>
Message-ID: <86e5f3b2-d1ae-414f-976e-062e7a293c9b@25g2000hsx.googlegroups.com>

On May 20, 10:17?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Paul McGuire <pt... at austin.rr.com> writes:
> > On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> >> I posted this code last night in response to another thread, and after I
> >> posted it I got to wondering if I had misused the list comprehension. Here's
> >> the two examples:
>
> >> Example 1:
> >> --------------------
> >> def compress(s):
> >> ? ? new = []
>
> >> ? ? for c in s:
> >> ? ? ? ? if c not in new:
> >> ? ? ? ? ? ? new.append(c)
> >> ? ? return ''.join(new)
> >> ----------------------
>
> >> Example 2:
> >> ------------------------
> >> def compress(s):
> >> ? ? new = []
> >> ? ? [new.append(c) for c in s if c not in new]
> >> ? ? return ''.join(new)
> >> --------------------------
>
> >> In example 1, the intention to make an in-place change is explicit, and it's
> >> being used as everyone expects it to be used. In example 2, however, I began
> >> to think this might be an abuse of list comprehensions, because I'm not
> >> assigning the result to anything (nor am I even using the result in any
> >> way).
>
> >> What does everyone think about this? Should list comprehensions be used this
> >> way, or should they only be used to actually create a new list that will
> >> then be assigned to a variable/returned/etc.?
>
> > Why not make the list comp the actual list you are trying to build?
>
> > def compress(s):
> > ? ? seen = set()
> > ? ? new = [c for c in s if c not in seen and (seen.add(c) or True)]
>
> <split hairs>
> Isn't
>
> ? ? c not in seen and (seen.add(c) or True)
>
> the same as
>
> ? ? seen.add(c) or c not in seen
>
> ?
>
> > ? ? return ''.join(new)
>
> (notice I haven't closed the tag!)
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -

Unfortunately, no.  "seen.add(c) or c not in seen" will never return
true, since c gets added to seen before testing if c in seen.

-- Paul


From pavlovevidence at gmail.com  Tue May 27 03:03:53 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 27 May 2008 00:03:53 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net>
Message-ID: <62ed1093-7d90-4fc6-b1b9-0edd3d1e1042@26g2000hsk.googlegroups.com>

On May 27, 2:42 am, "inhahe" <inh... at gmail.com> wrote:
> Well, I just need it once in a while.  Actually now is the only time I
> remember.  The last time what I needed was a file name extension.  I want a
> string called headers, but I want to derive a dict from it, also called
> headers.  So I figured the string would be called strHeaders, and the dict,
> dctHeaders probably, but when a precedent for something like that exists, I
> like to use it.


I doubt there's anything canonical since Python community, PEP 8, and
Python's dynamic typing all discourage its use.  I would venture to
say that the community would frown upon names such as "strHeaders"
since they don't agree with the naming conventions in PEP 8.  Instead,
use "str_headers" and "dict_headers".  Better yet, use "headers_str"
and "headers_dict".  Put the less important information last.


Carl Banks


From fc14301589 at icqmail.com  Sat May 31 14:48:28 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sun, 01 Jun 2008 02:48:28 +0800
Subject: File browser in python gui
References: <4841353e_1@news.tm.net.my> <g1rnuq$fqj$03$1@news.t-online.com>
Message-ID: <48419d7c_2@news.tm.net.my>

On 22:39, sabato 31 maggio 2008 Sebastian 'lunar' Wiesner wrote:

> What about QtGui.QFileDialog?

Yeah! Thank you!
So strange that I was looking for all around and it was already in my
computer.
I'm gonna back to study a little function that will return an existing/new
file or None (if Cancel is pressed)
-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From stefan_ml at behnel.de  Thu May 29 04:54:01 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 29 May 2008 10:54:01 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <483E6F29.8000805@behnel.de>

loial wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.

   lines_in_file2 = set(open("file2").readlines())
   for line in open("file1"):
       if line not in lines_in_file2:
           print line

Stefan


From hdante at gmail.com  Wed May 14 21:29:54 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 01:29:54 +0000 (UTC)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
	<f0312987-5aba-4c1d-8fcc-354e59cf5b5c@i76g2000hsf.googlegroups.com>
Message-ID: <g0g3mi$993$1@ger.gmane.org>

Em Wed, 14 May 2008 10:01:40 -0700, castironpi escreveu:

> On May 14, 11:58?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> 
> Love them opticals.

 Testing. :-P




From wuwei23 at gmail.com  Sat May 17 21:08:25 2008
From: wuwei23 at gmail.com (alex23)
Date: Sat, 17 May 2008 18:08:25 -0700 (PDT)
Subject: multiple databases, what's the best interface ?
References: <mailman.1279.1211050480.12834.python-list@python.org>
Message-ID: <325c024f-2bc2-40e5-85ac-cefb99a85709@w34g2000prm.googlegroups.com>

On May 18, 4:54 am, Stef Mientki <stef.mien... at gmail.com> wrote:
> What's the best interface so I can use the same program for all databases,
> and just have to change the database name, if I want to use another
> database ?

I really like sqlalchemy: http://www.sqlalchemy.org/features.html

- alex23


From mnikhil at gmail.com  Tue May 20 14:12:13 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:42:13 +0530
Subject: preserve history in the interactive python
Message-ID: <g0v49v$2ab$1@registered.motzarella.org>

Hi,

I am using python -i, and I find it hard typing/pasting the commands 
from the previous interactive shell. Basically, is there anyway that I 
can preserve the history in the shell?
I guess but not sure there should be something like ~/.pyrc for 
configuring such but can someone please let me know what is the 
effective environment variable to preserve the history?

Thanks,
Nikhil


From miller.paul.w at gmail.com  Sun May 25 19:19:37 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 16:19:37 -0700 (PDT)
Subject: Performance of Python builtins
Message-ID: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>

Is there any place outside the actual C source for Python that has
information about the performance of Python's built-in operations? For
example, I'd *expect* list.append to be O(1), and I hope that list[i]
is O(1), but I don't really know that for sure, since it would depend
a lot on the internal implementation.

I'm really only asking this for curiosity's sake --- more as a
reasonable, non-trollish version of the "Python is slow" post than
anything. :-)  I've never really had any problems with the performance
of Python code that I couldn't solve by either changing my algorithm
or, if all else has truly failed, rewriting in C or Pyrex.

What I'd like to see is something like http://svn.python.org/projects/python/trunk/Objects/listsort.txt
where Python's sorting algorithm is described, except with the focus
on other built-in constructs.

Thanks!


From wxPythoner at gmail.com  Sat May 10 16:56:39 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:56:39 -0700 (PDT)
Subject: Python doesn't recognize quote types
Message-ID: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>

There's a thing that bugs me in Python. Look at this...

>>> print "Testing\"
SyntaxError: EOL while scanning single-quoted string


Please focus on the part of the error message that states "while
scanning single-quoted string". How can Python claim it scanned a
single-quoted string when I fed it with a double-quoted string? Is
quote type (single quote and double quote) recognition not implemented
in Python?


From sumon.sadhu at gmail.com  Thu May  8 19:44:41 2008
From: sumon.sadhu at gmail.com (Sumon Sadhu)
Date: Thu, 8 May 2008 16:44:41 -0700
Subject: Write a python blog/website?
In-Reply-To: <880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
	<880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
Message-ID: <0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>

Hey Dotan,

My apologies if this post caused offense. Your assertion is right,  
maybe i should have emailed everyone individually like i've done with  
the first 45 sites, but it was never my intention to spam.

We're programmers like yourself, trying to build something that  
provides a lot of benefit. You can see our intentions are genuine  
(and our python ad server was fun to build)

So while i appreciate your response, it was never my attention to be  
"spammy"

Thanks,

- Sumon

On 8 May 2008, at 15:56, Dotan Cohen wrote:

> 2008/5/8 sharpshoot <Sumon.Sadhu at gmail.com>:
>> Hi Guys,
>>
>> I thought this would be really interesting to people who blog who
>> might be able to help us.
>
> Your proposal very well may be interesting to those who might be able
> to help you, yet, you dug your own grave by spamming the Python list.
> I see that your intentions were honest, but your post was unsolicited
> advertising, and off-topic at that.
>
> I don't 'blog'. I write web content. I have rather impressive traffic
> at some sites and your advertising seems to fit at least two or three
> medium-traffic sites I maintain. I won't experiment with the
> advertising on the large sites until I see results at the smaller ones
> first. However, snaptalent.com stands out as a spammer. I most
> certainly will not do business with spammers, and I am willing to
> sacrifice my bottom line to avoid making spammers richer. That's too
> bad, as there are many more effective ways that you could have reached
> me and others like me. The two or three fish you will net spamming the
> python list will not be worth your bad name, I assure you.
>
> Dotan Cohen
>
> http://what-is-what.com
> http://gibberish.co.il
> ?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?- 
> ?-?-?-?-?
>
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?



From mensanator at aol.com  Fri May  2 16:47:39 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 13:47:39 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
	<9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>
	<m2wsmca4n4.fsf@googlemail.com>
Message-ID: <e04036c9-aab3-4254-bdce-83236fd1bead@l64g2000hse.googlegroups.com>

On May 2, 2:26?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Mensanator <mensana... at aol.com> writes:
> > On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
> >> Mensanator wrote:
> >> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
> >> >> Shawn Milochik wrote:
> >> >>> How does one "plonk" stuff from Google Groups? Specifically, how
> >> >>> can this be done in Gmail?
> >> >> Set up a filter that looks for some phrase in the mail headers that
> >> >> identifies messages originating from google groups. ?Gmail's filters are
> >> >> fairly flexible. ?I'd probably just have it look for certain words.
> >> >> Look at an e-mail's source (raw view) and particularly check in the
> >> >> headers for things to filter by.
>
> >> > Why don't you just block all messages from Gmail?
>
> >> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
> >> (implying it's use for his own posting and viewing the list) that would
> >> work splendidly for him! ?Or not.
>
> >> Of course you're not likely to see this message either since I and many
> >> folks on here post from gmail.
>
> >> Spam comes mainly from Google Groups, not as much from Gmail in my
> >> experience.
>
> > I didn't say it was POSTED from gmail, but the spammers often have
> > gmail addresses, to wit:
>
> You're confusing gmail addresses and Google Groups
> (groups.google.com),

No, I'm not.

> which can be used as a web interface to usenet
> and mailing lists. ?

Read again what I wrote.

> Look at the 'Organisation' header of the messages
> you quote.
>
> It seems most of the spam on comp.lang.python is posted from Google
> Groups, *including* the one with a 'From' header which is not a gmail
> address.

To post from Google Groups, don't you need a legitimate e-mail
address?

Why does Gmail allow spammers to have e-mail accounts?

They are as much to blame as Google Groups.

>
> So it would be more efficient

And thus, stupid.

> to block messages posted from Google
> Groups than the ones from gmail addresses.
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -



From workitharder at gmail.com  Sat May 24 02:15:00 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:15:00 -0700 (PDT)
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com> 
	<4837225e$0$5507$9b622d9e@news.freenet.de>
	<jNHZj.147601$Tj3.61085@en-nntp-02.dc1.easynews.com>
Message-ID: <0f6bda3c-94c1-483b-893f-988315244a6f@p25g2000pri.googlegroups.com>

On May 23, 3:44?pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> ""Martin v. L?wis"" <mar... at v.loewis.de> wrote in messagenews:4837225e$0$5507$9b622d9e at news.freenet.de...
>
> > Try all three of them, in sequence:
>
> Thanks, will do.
>
> > If you absolutely don't want to import test, write
>
> I can live with the import, I just don't want to have to type out the full
> names all the time.
>
> ---Joel

t = reload(test).testFunc
t()


From wuwei23 at gmail.com  Mon May 12 22:52:45 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 19:52:45 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <968dc79b-f0ae-4505-867e-83801870af2f@z16g2000prn.googlegroups.com>

<bruno.desthuilli... at gmail.com> wrote:
> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

Try taking a look at the level of discourse in the Google App Engine
group.

It's pretty clear that some - let's say "developers" rather than
"programmers" - developers are simply interested in acquiring usage
patterns for the particular language they're required to develop in.
Being able to extend existing patterns or create new solutions is
completely outside of their scope of interest or ability. My
'favourite' is the "how do I do x?", "can you show me a working
example?", "can you add your example to my code?" sequence, you see a
lot of that.

I'd honestly expect a lot of the current GAE group posters to fail the
FizzBuzz test, especially given that an amazing number of them seem to
be constantly griping about not being able to run production code on
what is currently only a preview framework.

- alex23


From george.sakkis at gmail.com  Wed May 28 17:58:54 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 28 May 2008 14:58:54 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
Message-ID: <d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>

On May 28, 5:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> > Kind of like how this year's program won't work on next year's
> > Python?
>
> For somebody who has admitted to have only very rudimentary knowledge of
> python that's a pretty bold statement, don't you think?
>
> >  Except Flaming Thunder is faster. ;)
>
> Faster in execution speed for a very limited domain of problems - maybe.
>
> But unless it grows support for structured data types, arrays and maybe
> even an object system - it's nothing but a toy language.

I wouldn't even call it a toy language, it seems more like a sandbox
for fumbling around in compiler technology and language
"design" (loosely speaking). Fun as a research or alpha-stage project
but nowhere near production-ready.

To be fair, the graphics look cool and the "single-asset 8-by-8
shotgun cross compiler, written entirely in assembly language" sounds
impressive from an implementation point of view, in the sense that
building Deep Blue with nothing but NAND gates would; utterly
impressive and pointless at the same time. Which goes to prove that
hardcore hackers don't necessarily make decent language designers.

George


From fetchinson at googlemail.com  Sat May 10 22:35:39 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Sat, 10 May 2008 19:35:39 -0700
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <fbe2e2100805101935y6f2613cu59fa7bfe3eef21b2@mail.gmail.com>

I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
>    #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?



IMHO it's perfectly okay to use it as you describe it. Maybe you can switch
to xrange( ) which doesn't return a list but an iterator. Note that in
python 3.0 xrange will cease to exist and range( ) will return an iterator
instead.

Cheers,
Daniel

-- 
http://www.cafepress.com/putitdown
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From fiacre.patrick at gmail.com  Fri May 23 06:02:51 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 06:02:51 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
Message-ID: <4836964c$0$25057$607ed4bc@cv.net>

Jimmy wrote:
> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>> Jimmy wrote:
>>> Hi to all
>>> python now has grown to a versatile language that can
>>> accomplish tasks for many different purposes. However,
>>> AFAIK, little is known about its ability of kernel coding.
>>> So I am wondering if python can do some kernel coding that
>>> used to be the private garden of C/C++. For example, can python
>>> intercept the input of keyboard on a system level? someone told me
>>> it's a kernel thing, isn't it?
>> http://wiki.python.org/moin/elmer
> 
> well, straightly speaking, how can I know a key is pressed on a system-
> level if
> using python?

http://docs.python.org/lib/module-curses.html

Unless you are using an ancient piece of hardware -- a terminal is a 
pseudo terminal and a key stroke isn't a kernel event at all.

If you were looking for examples of kernel level functions you might 
want to consider driver interfaces -- how to program device interfaces 
-- that, too, can be done in Python -- but, again, you are always 
calling some underlying C function exposed via SWIG or another cross 
compilation tool.  Python doesn't reinvent system calls!  :-)


From alan.wright at volubill.com  Wed May 21 06:44:48 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 11:44:48 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net><mailman.1364.1211234091.12834.python-list@python.org><D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
	<mailman.1367.1211240706.12834.python-list@python.org>
Message-ID: <iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>

Same on FC8, sends RST after it sees SYN/ACK

"Ghirai" <ghirai at ghirai.com> wrote in message 
news:mailman.1367.1211240706.12834.python-list at python.org...
> On Mon, 19 May 2008 23:50:50 +0100
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Ghirai,
>> Scapy does the same, only it sends RST and not FIN, so still no help
>>
>>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
>>
>> Only have windows at the moment sadly.
>>
>> Alan
>>
>
> Are you sure there's no firewall or something else between you and the
> remote host?
>
> Because i just tried that command with scapy and it didn't send any other 
> packets
> except what it was told (1 packet with SYN flag set).
>
> I haven't tried on windows though.
>
> -- 
> Regards,
> Ghirai. 




From cameronlarue at gmail.com  Fri May 30 15:50:43 2008
From: cameronlarue at gmail.com (Cameron)
Date: Fri, 30 May 2008 12:50:43 -0700 (PDT)
Subject: accumulator generators
Message-ID: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>

I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
Graham article</a> and he builds an accumuator generator function in
the appendix. His looks like this:

<pre>
def foo(n):
  s = [n]
  def bar(i):
    s[0] += i
    return s[0]
  return bar
</pre>

Why does that work, but not this:

<pre>
def foo(n):
  s = n
  def bar(i):
    s += i
    return s
  return bar
</pre>


From info at thegrantinstitute.com  Fri May 16 16:34:58 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 16 May 2008 13:34:58 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080516133458.D51242FB142EC022@thegrantinstitute.com>

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From tjreedy at udel.edu  Sun May 25 12:59:17 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 12:59:17 -0400
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
Message-ID: <g1c5t4$2tt$1@ger.gmane.org>


"Rares Vernica" <rares at ics.uci.edu> wrote in message 
news:y1r1w3qan3p.fsf at ics.uci.edu...
| >>> l=list(s)
| >>> l.sort()

This can be condensed to l = sorted(s)

| >>> l
| ['a', 'b', 'c']





From bruno.desthuilliers at gmail.com  Mon May 19 16:35:55 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:35:55 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
Message-ID: <21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>

On 19 mai, 18:11, Henrique Dante de Almeida <hda... at gmail.com> wrote:
> On May 19, 7:03 am, Bruno Desthuilliers <bruno.
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Vicent Giner a ?crit :
>
> > > Hello.
>
> > > I am new to Python. It seems a very interesting language to me. Its
> > > simplicity is very attractive.
>
> > > However, it is usually said that Python is not a compiled but
> > > interpreted programming language
>
> > cf my answer to you and Henrique on this.
>
> > > I am working on my PhD Thesis, which is about Operations Research,
> > > heuristic algorithms, etc., and I am considering the possibility of
> > > programming all my algorithms in Python.
>
> > > The usual alternative is C,  but I like Python more.
>
> > Then use it.
>
> > > The main drawbacks I see to using Python are these:
>
> > > * As far as I understand, the fact that Python is not a compiled
> > > language makes it slower than C, when performing huge amounts of
> > > computations within an algorithm or program.
>
> > In which way is this a problem here ? I thought your thesis was about
> > algorithm, not about implementation optimisation ? And if it's the
> > later, then even C might sometimes be too high level - you should drop
> > to assembly language.
>
> > > * I don't know how likely it is to find libraries in Python related to
> > > my research field.
>
> > I can't tell but you'd be surprised by the quantity of available Python
> > libs.
>
> > > * I know Python is a "serious" and mature programming language, of
> > > course. But I do not know if it is seen as "just funny" in a research
> > > context. Is Python considered as a good programming language for
> > > implementing Operations Research algorithms, such as heuristics and
> > > other soft-computing algorithms?
>
> > Don't know if this answers your question, but it seems that at least
> > some authors consider it a good choice:http://www.oreilly.com/catalog/9780596529321/
>
> > All code examples in this books are in Python - very badly written
> > Python, alas...
>
> > > Maybe this is not the right forum, but maybe you can give me some
> > > hints or tips...
>
> > Hem... Obviously, most people here will have a little biased, you know ?-)
>
>  I agree with what most people here said, that the language doesn't
> really matter, etc., but that simply does not apply to the specific
> case of optimization research.
>
>  The little I know about optimization, even trivial problems may be
> hairy problems. Na?ve implementations simply don't finish and the
> performance bottlenecks are not necessarily in the numeric computation
> algorithms (so numpy doesn't help much here). If the guy is doing
> research on that, it possible that he will work with thousands (or
> millions) of weird constraints.
>
>  I'm pretty sure about that: when the algorithms take 4 hours to test
> a single execution, you value processor time.

I'm no expert here, but this sounds like a sensible argument to me.

OTHO, if the OP ends up spending more time writing boilerplate code
and fighting with gory implementation details than working on the
algorithm themselves, he might find than relative difference between
two possible algorithms (like one takes 4 hours and the second take 2
1/2 hours, but each took less than one hour to implement) is much more
important than having the first one taking 4 minutes, the second 2 1/2
minutes, and each having take 15 days to write and debug...

>  The situation would be simpler if there were good well-known toolkits
> for optimization in python (like numpy for matrix operations), but
> that's not the case.

There's at least Psyco (if you're willing and able to restrict
yourself from using some of the most dynamic parts of Python - which
might not be a problem here).  One could also mention stuff like Pyrex
and Cython.


From PurpleServerMonkey at gmail.com  Sat May 24 05:38:00 2008
From: PurpleServerMonkey at gmail.com (PurpleServerMonkey)
Date: Sat, 24 May 2008 02:38:00 -0700 (PDT)
Subject: Python, Daemons and D-Bus
Message-ID: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>

Seeking feedback from group members on a design I'm looking at using
in a project.

I've created an XML-RPC server and a number of Daemons, the idea is
that the XML-RPC server gets a request from a user interface of some
sort and then sends data to the Daemon processes to do work. Daemons
will also need to feed back task information to the XML-RPC server.

For the communications between the Daemons and XML-RPC server I was
thinking of using D-Bus (The project is for Linux and *BSD) but wanted
to hear what others thought of the idea?

Would you use D-Bus or a more traditional IPC method such as sockets?
Although D-Bus is relatively new it looks interesting, just not sure
it would work well in this kind of project.

Thanks in advance for your thoughts and opinions.


From johnjsal at NOSPAMgmail.com  Tue May 20 13:22:28 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:22:28 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
Message-ID: <027e0bd9$0$26878$c3e8da3@news.astraweb.com>

"Paul McGuire" <ptmcg at austin.rr.com> wrote in message 
news:b56a93ee-b177-44fb-927a-1e204f491639 at t54g2000hsg.googlegroups.com...
On May 20, 10:50 am, s0s... at gmail.com wrote:
> def compress(s):
> return list(set(s))
>
> That does the trick.

Wow, I just *knew* there had to be some built-in function that would make 
this problem trivial! :)

Only if order does not need to be maintained.  list(set(s)) will not
necessarily keep the unique characters in the order they are seen.
We'll have to check with the OP to see if this is important (I just
assumed that it was because of the use of list comps).

Good point. For me it doesn't matter because it wasn't my problem 
originally. I just had a question about the list comp. But if order matters, 
then I guess set doesn't work? 




From robert.kern at gmail.com  Thu May  8 18:22:58 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 08 May 2008 17:22:58 -0500
Subject: python vs. grep
In-Reply-To: <bQKUj.8781$0L.2506@trnddc07>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<bQKUj.8781$0L.2506@trnddc07>
Message-ID: <fvvug2$l70$1@ger.gmane.org>

Alan Isaac wrote:
> Anton Slesarev wrote:
>> I've read great paper about generators:
>> http://www.dabeaz.com/generators/index.html Author say that it's easy 
>> to write analog of common linux tools such as awk,grep etc. He say 
>> that performance could be even better. But I have some problem with 
>> writing performance grep analog. 
> 
> https://svn.enthought.com/svn/sandbox/grin/trunk/

As the author of grin I can definitively state that it is not at all competitive 
with grep in terms of speed. grep reads files really fast. awk is probably 
beatable, though.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From ivan.illarionov at gmail.com  Wed May  7 21:15:43 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 8 May 2008 01:15:43 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <fvtk7v$864$1@news.mtu.ru>

On Wed, 07 May 2008 21:13:27 -0400, Miles wrote:

> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>  <ivan.illarionov at gmail.com> wrote:
>  > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>  >
>  >  > Is there a way to do:
>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>  >  > x[0,2:6]
>  >  >
>  >  > That would return:
>  >  > [0, 3, 4, 5, 6]
>  >
>  >  IMHO this notation is confusing.
>  >
>  >  What's wrong with:
>  >  [0]+x[2:6]
> 
>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list
>  slicing:
> 
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10); return @x[0, 2..6]; // returns
>  (1, 3, 4, 5, 6)

So it should be x[0] + x[2:6] or x[0].extend(x[2:6])


From rossgk at gmail.com  Wed May 28 12:01:01 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 09:01:01 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
Message-ID: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>

I'm a newbie to python threads, and playing with some simple client
server stuff and lots of print statements.

My server thread launched with
     self.worker = WorkerThread(self)
completes an interaction and then if I check on it's status with
     print "Status:", self.worker        I get        Status none


A client thread behaves differently. Launched as
      self.clientWorker( = ClientThreadself)
when it finishes it's work, I instead get:
     Status: <ClientThread(Thread-2, stopped)>

If I check the isAlive status on each of those, self.worker.isAlive
throws an exception, 'cause there is nothing there anymore to check
isAlive on.  But self.clientWorker comes back as False, since it is a
stopped thread and hasn't gone away (which I'd like it to after it
finishes its work).

So my question is when a thread finishes its work how do I more
predictably control whether it is just stopped, or goes away all
together?   I don't want to do a double nested 'if' statement to check
if it exists before I check if it's alive.



From skanemupp at yahoo.se  Fri May  9 22:58:13 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 19:58:13 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com> 
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com> 
	<4824fcec$1@news.mel.dft.com.au>
Message-ID: <eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>

> The inner pair of () are not necessary.

yes they are?


ty anyway, got it now.


From __peter__ at web.de  Sun May  4 03:09:41 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 May 2008 09:09:41 +0200
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <fvjnfl$uqf$03$1@news.t-online.com>

dave wrote:

> I made a function that takes a word list (one word per line, text file) 
> and searches for all the words in the list that are 'shifts' of 
> eachother. ?'abc' shifted 1 is 'bcd'
> 
> Please take a look and tell me if this is a viable solution.
> 
> ?def shift(word, amt):
> ????????ans = ''
> ????????for letter in word:
> ????????????????ans = ans + chr((ord(letter) - ord('a') + amt) % 26 +
ord('a'))
> ????????return ans
> 
> def fileshift(x):
> ????????fin = open(x)
> ????????d = {}
> ????????for line in fin:
> ????????????????d[line.strip()] = [1]
> ????????????????for i in range(1, 26):
> ????????????????????????ite = shift(line.strip(), i)
> ????????????????????????if ite in d:
> ????????????????????????????????print ite
> 
> 
> Any tips/suggestions/critiques greatly appreciated.. I'm trying to 
> teach myself Python (and still beginning) and would love any helpful 
> info.

My ideas: 

Move the open() call out of fileshift() and have it working with arbitrary
iterables. 
Store a normalized version of the word in the dictionary. if every word in
the dict is guaranteed to start with an "a" you can reduce the number of
tests to one.
If you have many words you can build a fast shift() function based on
str.translate().

Invoke the following script both with and without a filename argument:

from string import ascii_lowercase as chars, maketrans

tables = [maketrans(chars, chars[i:] + chars[:i]) for i in range(26)]

def shift(word, n):
    return word.translate(tables[n%26])

def normalize(word):
    a = word[0]
    return shift(word, ord("a") - ord(a))

def findshifted(words):
    d = {}
    for word in words:
        d.setdefault(normalize(word), []).append(word)
    return d


if __name__ == "__main__":
    import sys
    args = sys.argv[1:]
    if args:
        words = (line.strip() for line in open(args[0]))
    else:
        import random
        sample = """\
        alpha
        beta
        gamma
        delta
        """.split()

        words = sample + [shift(random.choice(sample), random.randrange(26))
for _ in range(10)]

    items = findshifted(words).items()
    items.sort()
    for k, v in items:
        print k, "-->", v

Peter


From b0bm00r3 at gmail.com  Sun May 11 02:22:43 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:22:43 -0700 (PDT)
Subject: Keeping two lists aligned after processing
Message-ID: <3695ddb4-373f-4702-bdb8-4d067778fa7a@e53g2000hsa.googlegroups.com>

"""
I have a population of five algorithms. Each Alg has a method,
Alg.accuracy(), which calculates its accuracy. Running the accuracy
method on each Alg, I end up with a list of accuracies like [0.75,
0.10, 0.45, 0.80, 0.45]

Now I want to store the algorithms and associated accuracies in a
file, in descending order of accuracy.

Here's how I do it now. There must be a better way! This method is
inelegant, and does not handle at all the issue of what to do with
duplicate accuracies, such as the two different algorithms with 0.45
accuracies in the example above. It merely saves the first of the
duplicates -- not what I want at all.

I want to end up with a file:

0 AlgD 0.80
1 AlgA 0.75
2 AlgC 0.45
3 AlgE 0.45
4 AlgB 0.10

"""

algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
accs=[]
for alg in algs:
   thisacc=getattr(alg.accuracy)()   #comp.lang.python April
   accs.append(thisacc)

unsortedaccs=[x for x in accs] # to preserve unsorted
accs.sort()
accs.reverse()   # ending up with sorted list

nuorder=[]
for ax,acc in enumerate(accs):
   spot=unsortedaccs.index(acc)
   nuorder.append(spot)

ofn=open('store.alg','w')
for ord in nuorder:
   alg=algs[ord]
   acc=unsortedlist[ord]
   ofn.write("%d %s,%s" % (ord,alg,str(acc))
ofn.close()


From mensanator at aol.com  Mon May 12 14:47:42 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 12 May 2008 11:47:42 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <mailman.983.1210605470.12834.python-list@python.org>
Message-ID: <17db55cb-20ca-4802-9067-f203a580bc21@27g2000hsf.googlegroups.com>

On May 11, 7:05?pm, "Delaney, Timothy (Tim)" <tdela... at avaya.com>
wrote:
> Mensanator wrote:
> > Ok, I agree with 101, but I wouldn't necessarily
> > say the others were unfortunate. You might be
> > surprised at how often such fixations discover
> > bugs, something that I have a gift for.
>
> The discovering, the making, or both? ;)

Both, of course. The trick is to catch your errors before
anyone gets to see them. Then you get a reputation for being
clever.

>
> Tim Delaney



From miller.paul.w at gmail.com  Mon May 26 14:57:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 11:57:39 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>

On May 26, 2:34?pm, notnorweg... at yahoo.se wrote:

I wanted to address some other points I failed to mention in my first
response.

> so are they fundamentally differently built or is it just a lot of
> lowlevel operations built on top of each other?

Partly.  A high-level language is essentially one that gives you high-
level operations, like "apply the function f to each element of the
sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].

But, it's more than that.  (You use Haskell as your example, but I'll
use Python because I know it roughly a million percent better than
Haskell... hehe.)  In Python, you have support from the language to
treat functions as first-class objects; in C, you explicitly cannot do
this -- to map an arbitrary function over a sequence, you're
restricted to accessing the function through a pointer.  On the
surface, it's the same operation, but that extra level of indirection
can really bog one's mind down.  Think about how difficult it is for a
human to interpret the declaration of a function pointer in C, for
instance.

> haskell is considered a very highlevellanguage but can you do
> systemsprogramming with it(yes maybe it is very unpractical i dont
> know but can you)?


> is lambda calculus a more abstract and efficient way of modeling a
> computer?

Lambda calculus doesn't model computers.  It models *computation*.
That is, given a Turing machine, there's a set of functions in the
lambda calculus, which, when suitably combined, will yield the exact
same result as the original Turing machine.  That doesn't in any way
imply that Turing machines work by interpreting lambda calculus.

> how did lispmachines work? was the basic system programmed in LISP?

Yes, the whole kit and kaboodle, all the way down to the microcode was
programmed in LISP.  In principle, there's no reason we couldn't have
Haskell machines or Python machines.  It's just that nobody's been
crazy enough to do it, that I know of. :-)


From dReEeMpOeVsEtT1H at IgSmail.com  Thu May 29 19:30:05 2008
From: dReEeMpOeVsEtT1H at IgSmail.com (deepest1)
Date: Fri, 30 May 2008 01:30:05 +0200
Subject: boost
References: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>
	<1uv2h5-dii.ln1@satorlaser.homedns.org>
Message-ID: <MPG.22a95ae9ddf5f5a798968d@news.t-com.hr>

Thanks for help.

I lost more then 10 hours on boost today, but it finally works, and I'm 
pleased with it.

:)


From george.sakkis at gmail.com  Wed May 21 18:32:53 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 21 May 2008 15:32:53 -0700 (PDT)
Subject: Segmentation fault on updating a BYTEA field [psycopg2]
Message-ID: <f3b33874-7f0c-4fb7-a5d3-d3c75927000c@f63g2000hsf.googlegroups.com>

I have a simple DB table that stores md5 signature pairs:

   Table "public.duplicate"
  Column  | Type  | Modifiers
----------+-------+-----------
 sig      | bytea | not null
 orig_sig | bytea | not null
Indexes:
    "duplicate_pkey" PRIMARY KEY, btree (sig)
    "ix_duplicate_orig_sig" btree (orig_sig)

I use SqlAlchemy to interact with it and inserting works fine; update
however crashes hard with a segfault. Sure enough, the crash is
reproducible when using the underlying psycopg2 directly:

>>> import psycopg2
>>> connect_string = ...
>>> conn = psycopg2.connect(connect_string)
>>> cur = conn.cursor()
>>> cur.execute('SELECT sig,orig_sig from duplicate limit 1')
>>> d = cur.fetchone()
>>> d
(<read-only buffer for 0x40209100, size 16, offset 0 at 0x403054e0>,
<read-only buffer for 0x402090f0, size 16, offset 0 at 0x40305580>)
>>> map(str,d)
["\x02#qO\xb0\xcc\xfcx\xb9u\xa5\x83)\xc4'@", '\xa1\xf22\xf6y\xd0\xbc
\xea6\xf0Y\xf1"\xc9(\n']
>>> cur.execute('UPDATE duplicate SET orig_sig=%(orig_sig)s WHERE duplicate.sig = %(duplicate_sig)s',
...             dict(orig_sig=d[0], duplicate_sig=d[1]))
Segmentation fault

Am I (and SqlAlchemy) doing something silly or is this a bug in
psycopg2 ?

George


From jorgen.maillist at gmail.com  Wed May 21 04:45:21 2008
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Wed, 21 May 2008 10:45:21 +0200
Subject: Print HTML from Python
Message-ID: <11e49df10805210145g56b4266fjf94eb2c480fd9625@mail.gmail.com>

Hi All,

I am at a loss. This is slightly OT because it concerns Windows and
HTML printing. I would like to print a HTML document from Python, but
not showing the printing dialog. After numerous searches and trials I
came to the conclusion that ShellExecute with the "print" command and
a HTML document simply always shows a print dialog, so that road is a
dead end (or unless someone can show me a snippet that does work).

I used win32com and I am able to print through he internet explorer
interface which seems to work, but quite unreliably. When I execute
the scipt too fast, nothing is printed at all. The method isBusy that
IE exposes through COM always returns False so there is no way to wait
reliably on the progress of the printer.

So basically my question is, does someone know a python lib or way to
print HTML to the default printer (I can get the printer name so even
that is not really needed) without showing the print dialog?

With regards,
- Jorgen


From conradwt at gmail.com  Tue May 13 20:29:59 2008
From: conradwt at gmail.com (Con)
Date: Tue, 13 May 2008 17:29:59 -0700 (PDT)
Subject: Install Python MySQL db module?
Message-ID: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>

Hi, how does properly install the Python MySQL db module for Mac OS
X?  I was only able to locate the Win32 modules.

Thanks in advance,

-Conrad




From castironpi at gmail.com  Wed May 14 14:04:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:04:43 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>
Message-ID: <a372359c-e323-4437-8e9a-0e4c52f81ded@d1g2000hsg.googlegroups.com>

On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> >?Should tuples be named?
>
> Yes.

Not clearly should.  Sequences ought be.  If you're on the right time
for both, can't the library hold the B?


From mathieu.prevot at gmail.com  Sat May 24 08:09:07 2008
From: mathieu.prevot at gmail.com (Mathieu Prevot)
Date: Sat, 24 May 2008 14:09:07 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
Message-ID: <3e473cc60805240509t207853dcm5240c110f723fad1@mail.gmail.com>

Hi

I import subprocess and use Popen, but PIPE is not defined. I used
2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
always the same. What am I missing ?

Thanks
Mathieu


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:22:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:22:59 -0300
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
Message-ID: <op.ua4o8lhbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 15:18:31 -0300, globalrev <skanemupp at yahoo.se>  
escribi?:
> On 13 Maj, 18:59, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
>> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>>
>> > if i do something like
>> > while 1:
>> >     print "x"
>>
>> > will the program ever stop because it runs out of memory?
>>
>> No, there is no reason to run out of memory. This will simply
>> make an everlasting x-printer and there is no need to store
>> anything [...]
>
> and when the program get skiled because out of memory all this will be
> deleted from the memory?

Yes. That's the operating system job.

> so there is no way that you can, by accident, fill your whole
> harddrive and make it unusable?
>
> and RAM-memory always get cleaned out when not used i guess?

We were talking of RAM, including virtual memory backed by disk space.
You *may* fill your whole disk if you keep writing data. If you invoke  
your example above using:
python neverending.py > output
the "output" file will grow indefinitely until you kill the program or you  
get a "disk full" exception.
That disk space is not cleared when the program exits - you have to  
explicitely delete the file.
Note that none of this is Python specific.

-- 
Gabriel Genellina



From rhamph at gmail.com  Sun May 18 12:15:56 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sun, 18 May 2008 09:15:56 -0700 (PDT)
Subject: waiting on an event blocks all signals
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
	<69auuoF2uob0sU1@mid.uni-berlin.de>
Message-ID: <68e1821b-37e1-4c96-a812-2105ab305561@j33g2000pri.googlegroups.com>

On May 18, 9:05 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> alan schrieb:
>
> > This ignores CTRL-C on every platform I've tested:
>
> > python -c "import threading; threading.Event().wait()"
> > ^C^C^C^C
>
> > It looks to me like all signals are masked before entering wait(). Can
> > someone familiar with the internals explain and/or justify this
> > behavior? Thanks,
>
> They aren't masked. Read the docs:
>
> # Although Python signal handlers are called asynchronously as far as
> the Python user is concerned, they can only occur between the ``atomic''
> instructions of the Python interpreter. This means that signals arriving
> during long calculations implemented purely in C (such as regular
> expression matches on large bodies of text) may be delayed for an
> arbitrary amount of time.
>
> (http://docs.python.org/lib/module-signal.html)
>
> Which is what is happening here - wait is implemented in C. So the
> arriving signal is stored flagged in the interpreter so that the next
> bytecode would be the signal-handler set - but the interpreter still
> waits for the blocked call.

If a signal arrives while the thread is in a syscall it will usually
interrupt the syscall.  Most code in the interpreter will see the
EINTR error code and check if we have a signal to process, which leads
to raising a KeyboardInterrupt exception.  However, most thread
synchronization functions specified in POSIX are not interrupted by
signals, so the interpreter never has a chance do anything.  Why would
we care anyway, as Python doesn't let you intentionally interrupt a
non-main thread?


From miller.paul.w at gmail.com  Mon May 26 15:18:47 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:18:47 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org>
Message-ID: <014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>

On May 26, 10:36?am, Laura Creighton <l... at openend.se> wrote:
> I'm looking for an application that handles the membership of an
> organisation -- who's a member, who has paid fees, addressbook and
> the odd added field.
>
> Anybody got one they recommend?
>

It sounds like you essentially need a specialized database and an app
to query the database.  If this is a small organization (under 100
people, say), then the simplest solution would probably be a simple
spreadsheet.  Otherwise, maybe something like Organizers' Database
(http://www.organizersdb.org/) would do the trick.

I haven't actually used this software, but it looks like it's made to
do exactly what you want to do.

Hope that helps!



From roy at panix.com  Sat May 24 18:04:31 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 18:04:31 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <roy-256A5B.18043124052008@70-1-84-166.area1.spcsdns.net>

David <wizzardx at gmail.com> wrote:
> Problem 1: You can only code against tests

Yup.  That's the flavor of Kool-Aide being served at a convenient TDD 
outlet near you.

> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing the
> code you will also think of a lot of corner cases you should also
> handle. The natural way to do this is to add them to the code first.

That's only the natural way if you're haven't drunk the Kool-Aide :-)  It 
takes a while to get used to, but once you get the hang of it, doing it 
this way becomes very natural.  Sure, I think of corner cases when I'm 
writing code.  But, what I do with them is write a test for them first, 
then write the code which implements it.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 04:29:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 10:29:45 +0200
Subject: Compress a string
In-Reply-To: <mailman.1315.1211133997.12834.python-list@python.org>
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <48328bf3$0$23651$426a34cc@news.free.fr>

Matt Porter a ?crit :
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
> 
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
> 
> 
> def compress_str(str):

using 'str' as an indentifier will shadow the builtin str type.

>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
> 
> 

Now everyone gave smart solutions, may I suggest the stupidier possible one:

def compress_string(astring):
    compressed = []
    for c in astring:
        if c not in compressed:
            compressed.append(c)
    return ''.join(compressed)

Not elegant, but at least very clear.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon May 19 15:58:07 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 19 May 2008 21:58:07 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<vi1Yj.144433$Er2.142300@bignews6.bellsouth.net>
Message-ID: <69e4efF31tjn1U2@mid.individual.net>

inhahe wrote:

> i see lots of neat one-liner solutions but just for the sake of
> argument:
> 
> def compress_str(str):
>      new_str = ""
>      lc = ""
>      for c in str:
>         if c != lc: new_str.append(c)
>      return new_str

Please test before posting.

>>> compress_str("AAAABBBBCCCCC")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 5, in compress_str
AttributeError: 'str' object has no attribute 'append'

Regards,


Bj?rn

-- 
BOFH excuse #48:

bad ether in the cables



From marlin_rowley at hotmail.com  Fri May 16 19:23:03 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:23:03 -0500
Subject: More on numpy trickiness.
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W206F39A4D8594A110FBB5A9FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From giraffeboy at gmail.com  Wed May 21 06:30:04 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 03:30:04 -0700 (PDT)
Subject: Database Query Contains Old Data
Message-ID: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>

Hi there,

I'm having a problem with the Python db api, using MySQL.

I've written a program with a GUI using wxPython, the GUI is contained
in main.py which imports another module - reports.py. There are
several reports that are selected using the gui, and each report is a
class in the file reports.py. These classes contain a method which is
passed data as arguments and produces a report, writing HTML to a file
and using matplotlib to create a graph file.

The report class methods are called from the GUI using the following
code:
        agentlist = self.getselected()
        detail = self.cb1.GetValue()
        if self.getdates() != False:
            fromdate, todate = self.getdates()
            app.mainframe.SetStatusText("Generating Report...")
            if self.reportchoice.GetSelection() == 0:
                thereport = reports.VehicleRunningCost()
                thereport.producereport(agentlist, fromdate=fromdate,
todate=todate, detail=detail)
            app.mainframe.SetStatusText("Report Complete")
            viewerframe = ViewerFrame(None, -1, "Mileage and Fuel
Report Viewer")
            viewerframe.Show(True)

The first time you run a report, everything works as expected but if
you run it a second time, after modifying data, it seems that the data
from before the modification is selected on the second report run.

It would be much appreciated if anyone could give me any hints as to
why the old data is selected. I haven't posted the full code because
it's quite long but will post more if anyone wants to see specific
parts.

Thanks!
Andrew


From vinay_sajip at yahoo.co.uk  Thu May 29 05:16:19 2008
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Thu, 29 May 2008 02:16:19 -0700 (PDT)
Subject: Custom log handler and logging.config.fileConfig()
References: <mailman.1700.1212008047.12834.python-list@python.org>
Message-ID: <72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>

On May 28, 9:53 pm, "Lowell Alleman" <low... at allemansonline.com>
wrote:
> Here is the situation:  I wrote my own log handler class (derived fromlogging.Handler) and I want to be able to use it from aloggingconfig
> file, that is, a config file loaded with thelogging.config.fileConfig() function.
>
> Let say myloggingclass is called "MyLogHandler" and it's in a module
> called "mylogmodule", I want to be able to make an entry something
> like this in myloggingconfig file:
>
>    [handler_hand02]
>    class=mylogmodule.MyLogHandler
>    level=DEBUG
>    formatter=form02
>    args=('python.log', 10, True)
>
> I did some digging in the code and documentation, and it doesn't
> appear that this question of writing and accessing your own log
> handlers is addressed.  As per thelogging/config.py code, it looks
> like the actual file handler classes are being grabbed using an "eval"
> from the "logging" module's namespace, like so:
>    klass = eval(klass, vars(logging))
>
> So this basically means that I have to mess with the "logging"
> module's namespace if I want this to work, right?  So I've come up
> with a couple of options, but I'm trying to figure out what approach
> is best:
>
> Option 1:  Require the client (the user of myloggingmodule), first
> import my module and then copy it into theloggingmodule's namespace,
> before calling  fileConfig().  Something like this:
>
>     import mylogmodule
>     importlogging
>    logging.mylogmodule = mylogmodule
>
> Option 2:  Have my module make a copy MyLogHandler class into thelogging(orlogging.handlers) module, and then let the client use it
> from their directly.  They client would still have to load mylogging
> class first (which isn't any different they what they would have to do
> if they wanted to use the extended log handlers form thelogging.handlers module)
>
> My module would include:
>     importlogging
>     class MyLogHandler(logging.Handler):
>         ...
>    logging.MyLogHandler = MyLogHandler
>
> The config file would simply have:
>     class=MyLogHandler
>
> Option 3:   Is there an easy (and non-evil) way for me to make my
> module available as "logging.mylogmodule" directly?  I am using
> setuptools, and it seems like what I've read about "namespaces", they
> do something close to what I'm looking for, but I think that requires
> that all of the "__init__.py"s involved be empty (or have some special
> namespace declaration code).  The __init__.py for theloggingmodule
> is not at all empty, so I suppose that rules out this option?  Anyone
> have some insights on this?
>
> Thanks in advance,
>
> - Lowell Alleman

Hi Lowell,

I think it's OK to use the logging.handlers namespace to add your
custom handlers - after all, the handlers namespace is for holding
handlers other than the basic ones included in "logging". So...

# -- myhandler.py ---
import logging.handlers

class MySpecialHandler(logging.handlers.RotatingFileHandler):
    def __init__(self, fn):
        logging.handlers.RotatingFileHandler.__init__(self, fn,
maxBytes=2000, backupCount=3)


# -- logging.ini ---
[loggers]
keys=root

[handlers]
keys=hand01

[formatters]
keys=form01

[logger_root]
level=NOTSET
handlers=hand01

[handler_hand01]
class=handlers.MySpecialHandler
level=NOTSET
formatter=form01
args=("rotating.log",)

[formatter_form01]
format=%(asctime)s %(levelname)s %(message)s
datefmt=
class=Formatter

# -- app.py ---
import logging.handlers, logging.config
from myhandler import MySpecialHandler

logging.handlers.MySpecialHandler = MySpecialHandler

logging.config.fileConfig("logging.ini")

logger = logging.getLogger("test")

for i in xrange(100):
    logger.debug("Message no. %d", i)


should produce the expected results.


From squareswallower at invalid.com  Sun May  4 01:17:07 2008
From: squareswallower at invalid.com (dave)
Date: Sat, 3 May 2008 23:17:07 -0600
Subject: word shifts
Message-ID: <fvjgsj$4j2$1@news.xmission.com>

Hello,

I made a function that takes a word list (one word per line, text file) 
and searches for all the words in the list that are 'shifts' of 
eachother.  'abc' shifted 1 is 'bcd'

Please take a look and tell me if this is a viable solution.

 def shift(word, amt):
	ans = ''
	for letter in word:
		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
	return ans

def fileshift(x):
	fin = open(x)
	d = {}
	for line in fin:
		d[line.strip()] = [1]
		for i in range(1, 26):
			ite = shift(line.strip(), i)
			if ite in d:
				print ite


Any tips/suggestions/critiques greatly appreciated.. I'm trying to 
teach myself Python (and still beginning) and would love any helpful 
info.

thanks!



From wmcbrine at users.sf.net  Sat May 24 20:36:28 2008
From: wmcbrine at users.sf.net (William McBrine)
Date: Sun, 25 May 2008 00:36:28 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <gw2_j.171$4c.64@trnddc08>

On Sat, 24 May 2008 13:12:13 +0200, Johannes Bauer wrote:

> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> 	printf("%s\n", buf);
> 	tmp = fgets(buf, sizeof(buf), f);
> }

I think a more Pythonic way to write this, in general, would be:

while (1) {
    char *tmp = fgets(buf, sizeof(buf), f);
    if (!tmp)
        break;
    printf("%s\n", buf);
}

In actual Python, that's:

while True:
    buf = f.readline()
    if not buf:
        break
    print buf

Yeah, it's longer than the traditional C way, but you don't need to have 
duplicate fgets() (or whatever) lines. On the plus side, you're less 
likely to get '=' and '==' accidentally swapped in Python.

For this specific example, it can be cut down much more:

for buf in f.readlines():
    print buf

(BTW, all of the above result in doublespacing the original file, but 
that's what your C version was doing, so I kept it that way.)

-- 
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- pass it on


From tjreedy at udel.edu  Fri May  9 16:02:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 16:02:58 -0400
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <g02ale$lnj$1@ger.gmane.org>


"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.uav4dutjx6zn5v at a98gizw.cpe.telecentro.net.ar...
En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta 
<banibrata.dutta at gmail.com> escribi?:

|> I already have Python25, and need to install Python24. I would prefer 
not to
|> remove Python25, but each Python version seems to update the registry, I
|> guess (not sure), overwriting each other's entries. Any way to have both
|> versions ?

|They can coexist peacefully. The last one you install will be the default 
|version to handle .py files automatically.

Since 2.5 at least, the Windows installer gives the option to make the new 
installation the default or not.  One might have to choose 'custom' versus 
'auto' (don't remember for Python), but I do the latter always anyway.

tjr







From justin.mailinglists at gmail.com  Tue May  6 21:45:28 2008
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: Tue, 6 May 2008 18:45:28 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>

On May 6, 5:19 pm, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>
> It doesn't work.
> Because subprocess.Popen execute "find" like this.
>
> C:\>find \"445\"
> ???? - \
>
> C:\>
>
> It adds a '\' before each '"'.
> How to remove the '\'?
> Thank you.

cannot help with the backslashes but try findstr instead of find


From zerty.david at gmail.com  Thu May  8 20:28:25 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 21:28:25 -0300
Subject: Cannot import opj
Message-ID: <5dc598e30805081728i7d451bber36991f5a547874a7@mail.gmail.com>

I'm trying to import the opj module
Trying like this:
from Main import opj
It says it doesn't exists
And like this:
import os.path.join as opj

Raises error.
What should I do?
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From skanemupp at yahoo.se  Thu May  1 12:07:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 1 May 2008 09:07:58 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <2d4d6a94-cac4-4359-962d-dff23ab42466@y38g2000hsy.googlegroups.com>

another program that has the same problem:
import sys, pygame
pygame.init()

size = width, height = 320, 240
speed = [2, 2]
black = 0, 0, 0

screen = pygame.display.set_mode(size)

ball = pygame.image.load("snake.png")
ballrect = ball.get_rect()

while 1:
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit()

    ballrect = ballrect.move(speed)
    if ballrect.left < 0 or ballrect.right > width:
        speed[0] = -speed[0]
    if ballrect.top < 0 or ballrect.bottom > height:
        speed[1] = -speed[1]

    screen.fill(black)
    screen.blit(ball, ballrect)
    pygame.display.flip()


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:25:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:25:33 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <mailman.1337.1211191001.12834.python-list@python.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
Message-ID: <483406a0$0$10773$426a74cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch
> <deets at nospam.web.de> escribi?:
>> Agustin Villena schrieb:
> 
>>> is there anyway to show the class of a method in an exception's 
>>> traceback?
>>> 
>>> I want to improve the line File "G:\dev\exceptions\sample.py",
>>> line 3, in foo
>>> 
>>> to File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>> 
>>> Is this improvement feasible
>> It should be. You can get a dictionary of the locals of an
>> exception stack frame, of which you could extract the
>> self-parameter's class.
> 
> That by itself is not enough, the method could be inherited; one
> should walk the base classes in the MRO to find the right one. And
> deal with classmethods and staticmethods. And decorators that don't
> preserve meta information... 

And monkeypatches.

> Hmmm, I think it isn't so trivial as it
> seems.

And not that useful - why would one care about the function being 
defined in class X or Y when one have the exact file and line ?



From dstanek at dstanek.com  Tue May 20 16:16:31 2008
From: dstanek at dstanek.com (David Stanek)
Date: Tue, 20 May 2008 16:16:31 -0400
Subject: scaling problems
In-Reply-To: <u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<mailman.1371.1211245489.12834.python-list@python.org>
	<u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>
Message-ID: <de32cc030805201316p65c36a58g2b266ef1bb153177@mail.gmail.com>

On Tue, May 20, 2008 at 12:03 AM, James A. Donald <jamesd at echeque.com> wrote:
> On Mon, 19 May 2008 21:04:28 -0400, "David Stanek"
> <dstanek at dstanek.com> wrote:
>> What is the difference if you have a process with 10 threads or 10
>> separate processes running in parallel? Apache is a good example of a
>> server that may be configured to use multiple processes to handle
>> requests. And from what I hear is scales just fine.
>>
>> I think you are looking at the problem wrong. The fundamentals are the
>> same between threads and processes.
>
> I am not planning to write a web server framework, but to use one.
> Doubtless a python framework could be written to have satisfactory
> scaling properties, but what are the scaling properties of the ones
> that have been written?
>

Both Django and TurborGears work well for me. When you step back and
think about it all of the popular web frameworks would do just fine.
The ones that don't do multiprocessing out of the box would be trivial
to load balance behind Apache or a real load balancer. Again the
problem here is the number of connections to the database, once you
get big enough to worry about it.

-- 
David
http://www.traceback.org


From bignose+hates-spam at benfinney.id.au  Thu May  8 18:35:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 May 2008 08:35:23 +1000
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
	<88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
Message-ID: <87y76ka0gk.fsf@benfinney.id.au>

offby1 <eric.hanchrow at gmail.com> writes:

> Ah.  So from the point of view of mut.py, "thing" and "system.thing"
> are separate, unrelated variables;

No. Thinking of them as "variables" (with all the non-Python
terminological baggage that implies) will only exacerbate the
confusion.

"thing" and "system.thing" are separate *names*, that can be
independently bound to different objects or the same object.

> the former of which is initialized from the latter when mut says
> "from system import thing".

Rather, the name "thing" is bound to the same object as the name
"system.thing" at the time "from system import thing" is executed.
What happens to the name "system.thing" afterward has no effect on the
name "thing".

-- 
 \     "Listen: we are here on Earth to fart around. Don't let anybody |
  `\               tell you otherwise."  -- _Timequake_, Kurt Vonnegut |
_o__)                                                                  |
Ben Finney


From martin at v.loewis.de  Mon May 12 13:37:48 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 19:37:48 +0200
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <4828806c$0$11583$9b622d9e@news.freenet.de>

> Hopefully this question even makes sense! 

I completely agree that you don't need to spend time on
learning a language if you don't plan on using it; I'll
leave alone the entire discussion of doing things for fun
only (you don't *need* to eat ice cream, either - right?)

OTOH: do you plan to do any programming at all, in your
life? If yes: consider using Python for every programming
task you'll encounter - unless there are outside constraints
demanding a different language. Python is flexible enough
for *all* you programming needs (I claim); then the acquired
knowledge will be useful.

To be effective in a language, you need to be fluent in it.
This involves both passive reading, as well as active
experimentation.

HTH,
Martin


From vdv100 at gmail.com  Sun May  4 11:28:54 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 16:28:54 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
Message-ID: <eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>

I can grab the image,  I need a way of grab the region size with the mouse,
a easy way of the user select a region of the image to analyze, something
like the  "Rectangle selection tool" of gimp.

Regards,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org

2008/5/4 David <wizzardx at gmail.com>:

> On Sun, May 4, 2008 at 4:25 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> > Hi,
> >
> > anyone know a Python library to grab the size of a selected image region
> > (the selection will be made with the mouse), that work in Linux ?
>
> You might be able to use this tool:
>
> http://freshmeat.net/projects/gtkshots/
>
> David.
>
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From zer0dyer at verizon.net  Mon May 26 20:05:44 2008
From: zer0dyer at verizon.net (Curtis)
Date: Tue, 27 May 2008 00:05:44 GMT
Subject: php vs python
In-Reply-To: <DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>	<g1d3lf$1rpd$3@news.mtu.ru>
	<bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>
	<DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>
Message-ID: <sfI_j.3434$tF1.773@trnddc01>

I V wrote:
> On Sun, 25 May 2008 21:41:09 -0400, Jerry Stuckle wrote:
>> The the good programmers are able to adapt to the language and make the
>> most of whatever language they're using.  The result is good code. OTOH,
>> poor programmers I have known have found all kinds of excuses - from the
>> language itself to lack of requirements, to anything else they can
>> blame, except the real root of the problem.
> 
> That's true - but I wonder if there might not be differences at the 
> margins. Some languages (and, which is not quite the same but not easy to 
> fully distinguish either, the communities around some languages) may 
> encourage mediocre programmers to produce slightly more or less mediocre 
> programs.
> 
> Some features of Python (the one that really stands out for me is not 
> default-initializing variables on first use; the comparatively clean 
> standard library might be another), and some features of the Python 
> community (which, IME, has more members more explicitly committed to 
> writing clean code) I think do make Python a better environment for us 
> mediocre programmers.

If you set PHP to show notices, it will tell you of such cases. 
However, the way I learned good programming practice was talking with 
other programmers, and trying different languages. I think if you have 
a real desire to write good code, and work at it, you can accomplish 
your task, regardless of the language.

However, there is definitely a prevalent amount of poorly written PHP 
on the Web, so it can be easy for a newcomer to pick up some bad 
practices. This isn't a fault of the design of the language, though.

> But maybe I'm wrong - I've never been paid to write Python programs, 
> whereas I have been paid to write PHP, so I might just be projecting my 
> frustrations with work onto the language. I've also not used PHP5 much in 
> anger, which does look to be a lot nicer than earlier versions.

Yeah, PHP5 is awesome, and PHP4 is dead/dying.

--
Curtis


From fc14301589 at icqmail.com  Wed May 28 06:38:47 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 28 May 2008 18:38:47 +0800
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
	<mailman.1640.1211888930.12834.python-list@python.org>
Message-ID: <483d3639_1@news.tm.net.my>

On 19:48, marted? 27 maggio 2008 Alex Gusarov wrote:

> I tried Eric (on windows), but then decided in favour of Eclipse +
> PyDev.

I'm a KDE fan :) and I like Qt design. I've Qt designer installed, but I much
like if I can use an IDE which write python code, rather than wrappers.

I've just been disappointed by Boa Constructor, it disappeared suddenly while
trying some test.
Which other SDK write in python code?




From kamhung.soh at gmail.com  Wed May 28 20:02:29 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 29 May 2008 10:02:29 +1000
Subject: convert string number to real number - ValueError: invalid  
	literal for int() with base 10: '"2"'
In-Reply-To: <pan.2008.05.28.18.07.20@rwth-aachen.de>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>	<20080228181914.6307257e.darcy@druid.net>	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>	<mailman.1676.1211955740.12834.python-list@python.org>	<a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>
	<pan.2008.05.28.18.07.20@rwth-aachen.de>
Message-ID: <g1krqn$ois$1@ger.gmane.org>

Matthias Bl?sing wrote:
> Am Wed, 28 May 2008 10:41:51 -0700 schrieb davidj411:
> 
>> I like the str2num function approach, but then i get left with a float
>> that has more than 2 decimal spaces , i.e. 11.50 becomes
>> 11.449999999999999 and round will not fix that.
> 
> Welcome to the wonderful world of floating point numbers. For your usage 
> you want 10-based numbers. Have a look at the decimal module:
> 
>>>> from  decimal import Decimal
>>>> a = Decimal("11.45")
>>>> a
> Decimal("11.45")
>>>> str(a)
> '11.45'
>>>> a + 1
> Decimal("12.45")
>>>> a + Decimal("1.55")
> Decimal("13.00")
> 
> HTH
> 
> Matthias
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Thanks for the tip, Matthias.  I knew that there had to be a way to 
handle arbitrary precision numbers.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From oldmantaggie at gmail.com  Wed May 14 14:19:05 2008
From: oldmantaggie at gmail.com (John Chandler)
Date: Wed, 14 May 2008 13:19:05 -0500
Subject: Submitting data to HTTPS javascript
Message-ID: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>

I am trying to write a script to test certain functionality of a website
that requires users to login. The login page is simple, a few pictures and
two text bars (one for username and one for password). I tried logging in
with webbrowser, but that did not work because the page uses javascript. I
also tried using win32com though I have no idea what I am doing. Any ideas?
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From deets at nospam.web.de  Tue May 13 11:50:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 17:50:04 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <68trmmF2vjivnU1@mid.uni-berlin.de>

> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables).  So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.

5-10 times faster for what kind of code? I don't see anything that resembles
OO features of python, let alone more advanced concepts like
meta-programming, higher-order functions and such. Which save tremendous
amounts of time coding. If FT grows these and *still* is 5-10 times faster,
I'll salut you.

And what is really expensive is brain-cycles, not cpu-cycles. Which above
described features save.
 
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
> 
> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed.  The difference: I
> can't afford to ignore users.

Oh *please*! Try getting nearly as feature & library complete as python is
today - and *then* I'll point to all the akwardness of FT. Let alone it is
very much a question of view-point if two different looping constructs or
keywords are more awkward than one general looping-concept with only one
keyword. It's a matter of taste.

Diez


From greg at cosc.canterbury.ac.nz  Fri May  9 04:56:18 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 09 May 2008 20:56:18 +1200
Subject: ANN: Pyrex 0.9.7
Message-ID: <mailman.858.1210338504.12834.python-announce-list@python.org>

Pyrex 0.9.7 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Highlights of this version:

* I have streamlined the integer for-loop syntax. Instead
   of the loop variable redundantly appearing in two places,
   it's now just

     for x < i < y:
       ...

* If you declare a variable as a list or dict, then calls
   to some of its methods will be compiled into type-specific
   Python API calls instead of generic ones.

* Most built-in constants are referenced directly instead of
   via dict lookup.

* There are two new builtin functions, typecheck() and
   issubtype(), for checking the types of arguments more safely
   (since isinstance and issubclass can be fooled).

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From offby1 at blarg.net  Thu May  8 15:00:51 2008
From: offby1 at blarg.net (Eric Hanchrow)
Date: Thu, 08 May 2008 12:00:51 -0700
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
Message-ID: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>

(This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)

This seems so basic that I'm surprised that I didn't find anything
about it in the FAQ.  (Yes, I am fairly new to Python.)

Here are three tiny files:

==== mut.py ====

    import system
    from system import thing

    def doit():
        print "       thing is", thing

    def do_it_slightly_differently():
        print "system.thing is", system.thing

==== system.py ====
    thing = "I am the original thing!!"

==== test.py ====
    import mut
    mut.doit()
    mut.do_it_slightly_differently()
    import system

    system.thing = "The new improved thing"
    mut.doit()
    mut.do_it_slightly_differently()

When I run "python test.py", I see

           thing is I am the original thing!!
    system.thing is I am the original thing!!
           thing is I am the original thing!!
    system.thing is The new improved thing

What surprises me is that the assignment to "system.thing" in test.py
only seems to affect the use of "system.thing" in mut.py, and not
affect the use of just plain "thing" in that same file.  I would have
expected my assignment to have affected both, or perhaps neither.

I have no idea why these two differ.  Can someone explain?
-- 
Rarely do we find men who willingly engage in hard, solid
thinking.  There is an almost universal quest for easy answers
and half-baked solutions.  Nothing pains some people more
than having to think.
        -- Martin Luther King, Jr.
        from "Strength to Love," 1963.



From simon at brunningonline.net  Fri May 23 08:29:24 2008
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 23 May 2008 13:29:24 +0100
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <8c7f10c60805230529v490577dfg3727591192c71537@mail.gmail.com>

On Thu, May 22, 2008 at 4:55 PM, duli <dulipishi at gmail.com> wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.

With regard to the arcitecture of systems rather than process, there
are some good boos liked to from here:
<http://martinfowler.com/articles/enterprisePatterns.html>. Patterns
of Enterprise Application Architecture in particular is a bit of a
classic.

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues | Twitter: brunns


From larzluv at hotmail.com  Sun May 11 00:41:33 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sat, 10 May 2008 21:41:33 -0700 (PDT)
Subject: Module python-magic on/for Windows?
Message-ID: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>

I've heard tell of a Python binding for libmagic (file(1) *nixy
command; see http://darwinsys.com/file/).  Generally, has anybody
built this and worked with it under Windows?

The only thing I've been able to find is the python-magic module at
http://hupp.org/adam/hg/python-magic/.

    [1] Is this "THE" python-magic module.  (It seems to be to me, but
obviously I don't know. :)

    [2] Has anybody been able to build THIS version under Windows?

I've gotten as far as completing the "setup.py install" process.
(After many troubles; I'll post the top-to-bottom HowTo-like info if/
when I ever get it to work.  :)

At this point, there -is- a "magic" module that can be imported
(attempted-to, that is), but it fails.

If I go to a cmd window, run the Py interpreter, and do "import magic"
I get:

    [1] an error pop-up (Windows window, which is blocking [as opposed
to "non-blocking", not "obscuring", though it does that, too] the cmd
window):

        (X) This application has failed to start because magic1.dll
was not found.  Re-installing the application may fix this problem.
[OK]

    [2] then, within the interpreter, I get:

        Traceback (most recent call last):
          File "<stdin>", line 1, in <module>
          File "build\bdist.win32\egg\magic.py", line 2, in <module>
          File "build\bdist.win32\egg\cmagic.py", line 7, in <module>
          File "build\bdist.win32\egg\_cmagic.py", line 7, in <module>
          File "build\bdist.win32\egg\_cmagic.py", line 6, in
__bootstrap__
        ImportError: DLL load failed: The specified module could not
be found.

I'm using Python 2.5 on Windows XP Pro.  I've got CYGWIN installed
(more info can be provided if necessary) for a copy of file.exe (and
libmagic.a @ 357KB and libmagic.dll.a @ 25KB in C:\cygwin\lib).  I
also have GNUWin32, also for file.exe alternatively (and
libmagic.dll.a @ ~ 8KB in C:\Program Files\GnuWin32\lib).

magic.py in C:\Program Files\Python25\Lib\site-packages\magic-0.1-
py2.5-win32.egg imports cmagic.py (also in this egg), which imports
_cmagic.py, which has the following:

    def __bootstrap__():
       global __bootstrap__, __loader__, __file__
       import sys, pkg_resources, imp
       __file__ =
pkg_resources.resource_filename(__name__,'_cmagic.pyd')
       del __bootstrap__, __loader__
       imp.load_dynamic(__name__,__file__)
    __bootstrap__()

Now I *presume* my problem (at this point) is that I need to have
libmagic named as "magic1.dll" -wherever- this module is looking for
it.  I'm just not sure, let alone if this is true, WHERE Python/
modules expect to find such things.

Also, which version(s)/file(s) should be placed where, or...??


Thanks for any/all help/pointers.  I apologize up-front if I left out
any pertinent info; I'm paranoid about putting in too much (and some
that may be worthless) already...  :)



Cheers,
Larry Hale


From eliben at gmail.com  Sat May 17 14:35:32 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 11:35:32 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com><dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com> 
	<mailman.1277.1211046869.12834.python-list@python.org>
Message-ID: <e9b63a8c-e9dd-464f-9c2b-90073bd0cfb7@2g2000hsn.googlegroups.com>

On May 17, 8:54 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "eliben" <eli... at gmail.com> wrote in message
>
> news:b439e7f0-685b-46b6-b0ea-3161cc548868 at m45g2000hsb.googlegroups.com...
> | Is there a simple way to find out which packages are used by my
> | script ?
>
> Ggrep for import statements?

This isn't very comprehensive :-)

>  (But that only only gives direct dependencies.)
> Does py2exe have an option to output the list it collects?|
> I think people have mentioned such here.

Digging around the standard library documentation, I came upon the
'modulefinder' module, which seems to be able to do what I want, at
least in terms of finding all the modules used. I wonder how difficult
it should be to wrap something around modulefinder that copies all the
relevant modules into a local directory and modifies sys.path
accordingly.

Eli




From sarenius at sun3.oulu.fi  Sun May 25 23:09:07 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Mon, 26 May 2008 03:09:07 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
	<slrng3jfji.hio.sarenius@sun3.oulu.fi>
	<p8GdndnA1KrXRKTVnZ2dnUVZ_oninZ2d@earthlink.com>
Message-ID: <slrng3kaej.n33.sarenius@sun3.oulu.fi>

In article <p8GdndnA1KrXRKTVnZ2dnUVZ_oninZ2d at earthlink.com>, Dennis Lee Bieber wrote:
>(Vesa-Matti Sarenius) declaimed the following in comp.lang.python:
>	And what reported the file not found -- some line of the Python
>script, or a spawned shell (since the line you point out is just
>creating a command to be executed a subprocess of some sort)

I think that would be the gsprint.exe.

>	The other matter would be: is the shell that command is passed off
>to using the same encoding?

That would be the windows shell (command prompt) and I know so little of
windows so I would not know...

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *




From exarkun at divmod.com  Thu May  8 11:50:42 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 8 May 2008 11:50:42 -0400
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <20080508155042.6859.1822443718.divmod.quotient.60559@ohm>

On Thu, 8 May 2008 08:29:33 -0700 (PDT), spectrumdt at gmail.com wrote:
>Hello.
>
>I am running Fedora Linux and KDE, using the Konsole command line.
>
>When coding Python, I regularly make a bug causing my program to not
>terminate. But how do I kill the non-terminating Python interpreter
>without killing the entire Konsole?
>
>The default way of killing the current process on the command line is
>Ctrl+C, but that doesn't work with Python. Neither do the "terminate
>task", "suspend task" or "interrupt task" commands (available from
>right-click in Konsole).

Ctrl+C often works with Python, but as with any language, it's possible
to write a program which will not respond to it.  You can use Ctrl+\
instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
Ctrl+\ sends SIGQUIT which typically isn't) or you can use the kill
command.  You can either use it in another terminal or you can suspend
the Python process (Ctrl+Z which sends SIGSTOP and _cannot_ be masked
or otherwise ignored) and then use kill in that terminal.  You need to
know the PID or jobspec in order to use kill.  In bash (and probably
elsewhere), jobspecs are easy.  When you hit Ctrl+Z, the jobspec will
be written to your terminal in the form "[N]+ Stopped       python". "N"
is the jobspec and you can kill it with "kill %N".  You may need to use
SIGKILL to end the process, in which case use "kill -KILL %N".  You can
then resume the Python process with the "fg" command, it will immediately
end since it has be killed.

This is more a Linux/bash/etc question than a Python question, so followups
might be directed to a more appropriate forum (eg, the man page for your
shell, or a bash user group, etc).

Jean-Paul


From jstucklex at attglobal.net  Fri May 23 07:42:39 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Fri, 23 May 2008 07:42:39 -0400
Subject: php vs python
In-Reply-To: <48369413$0$25059$607ed4bc@cv.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <WvSdna4685IhMKvVnZ2dnUVZ_o2dnZ2d@comcast.com>

Andrew Lee wrote:
> notbob wrote:
>> I'm not posting this just to initiate some religious flame war, though 
>> it's
>> the perfect subject to do so.  No, I actaully want some serious advice 
>> about
>> these two languages and since I think usenet is the best arena to find 
>> it,
>> here ya' go.
>>
>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  
>> Yet, I
>> want learn the guts of it instead of just booting up some wordwank or
>> whatever.  I started to learn python, but heard php was easier or 
>> faster or
>> more like shell scripting or... fill in the blank.  Anyway, so I 
>> change over
>> to learning php.  Then I run across that blog, Coding Horror, and start
>> reading articles like this:
>>
>> http://www.codinghorror.com/blog/archives/001119.html
>>
>> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
>> much.  I can setup mysql and apache,, but don't know how to use 'em, 
>> really.
>> I use emacs and run slackware and can fumble my way through bash scripts,
>> but I can't really write them or do lisp.  I've taken basic basic and 
>> basic
>> C, but am barely literate in html.  Sometimes it seems overwhelming, 
>> but I
>> persevere because it's more fun/challenging than video games, which 
>> bore me
>> to tears. 
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
>> Would I be better served in the long run learning python, which claims 
>> to be
>> easy as pie to learn/program (still looks hard to me).  I admit I'm no 
>> code
>> geek.  But, I'm not completely brain dead, either, and I need 
>> something to
>> keep my geezer brain sparking.  What say ye?
>>
>> nb
> 
> Personally, I believe PHP would get you more productive more quickly for 
> a blog, but it is a potentially brain damaging language in terms of 
> really getting your juices flowing with programming.  It is not a 
> general purpose language and suffers from all the limitations of of a 
> tool designed for one job.  If you are interested in programming and the 
> blog is your path to that, stick with Python!  In particular, immerse 
> yourself in mod_python or look at a framework like Django or Pylons -- 
> the learning curve is steep for any of these technologies but they are a 
> full meal compared to saltine cracker and water of PHP.

And what job is that?  I have a lot of batch scripts written in PHP, for 
instance.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From tjreedy at udel.edu  Thu May  8 16:31:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 16:31:31 -0400
Subject: Running a python code periodically
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <fvvnv0$u20$1@ger.gmane.org>


"Maryam Saeedi" <ma.saeedi at gmail.com> wrote in message 
news:ee9cd3be0805080902g48e641bxbcf1d5578620defe at mail.gmail.com...
|I was wondering if you know how can I run a python code once every five
| minutes for a period of time either using python or some other program 
like
| a bash script.

I expect the following should work.

from time import sleep
while True: #or
# for i in range(nunber_of_cycles):
  do_whatever()
  sleep(600)

assuming do_whatever() is quick and you do not need exactly 5 minute 
intervals.


| I have asked this question before and some of you answered me but I still
| have problem. Most of the answers was to use cron and crontab which works 
on
| my computer but not if I want to do it on department's computer since I 
do
| not have permission to change those files. Is there any other way which 
does
| not need administrator permission?





From darcy at druid.net  Fri May 16 10:52:00 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 10:52:00 -0400
Subject: writing python extensions in assembly
In-Reply-To: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <20080516105200.eeafe010.darcy@druid.net>

On Fri, 16 May 2008 10:13:04 -0400
"inhahe" <inhahe at gmail.com> wrote:
> Can anyone give me pointers/instructions/a template for writing a Python 
> extension in assembly (or better, HLA)?

I am trying to imagine the requirements document for your project.

 - Must be error prone and hard to debug
 - Must take an order of magnitude longer to write
 - Must be unportable to other systems

Really, why don't you write your etension in C?  Do you really think
you will improve your code by writing it in assembler?  Even embedding
assembler in C code make it unportable and I find it hard to imagine
anything that you want to do in a Python context that can't be done at
least as well in C if not pure Python.

Just curious is all.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From Sizer at nospam.com  Thu May  8 05:25:02 2008
From: Sizer at nospam.com (Sizer)
Date: 8 May 2008 04:25:02 -0500
Subject: Can't drag and drop onto .py in Windows XP?
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
	<mailman.703.1210165759.12834.python-list@python.org>
Message-ID: <Xns9A981832F18E9sizernospamcom@216.40.28.87>

"Roger Upole" <rupole at hotmail.com> wrote in
news:mailman.703.1210165759.12834.python-list at python.org: 
> Sizer wrote:
>> It's just a little weird that I
>> can't just drag and drop file names onto .pyw or .py files. Am I
>> missing something here?
>>
>> Thanks for any help.
> 
> You can register a DropHandler for the Python file class.
> Put this in a .reg file and merge it into the registry:
> 
> REGEDIT4
> 
> [HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
> @="{86C86720-42A0-1069-A2E8-08002B30309D}"

Sir, you rock! I found that it actually worked a little better if I used 
a generic wsh drop handler instead of the .exe handler, but I would never 
have known where to start looking without your suggestion. I ended up 
with the following .reg file, and now I can drag and drop files onto my 
.py, .pyw, and .pyc files and off they go as you'd expect. It kind of 
seems like this should be the default installer behavior unless there's a 
good reason not to do it. Thanks again for your help.

REGEDIT4

[HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

[HKEY_CLASSES_ROOT\Python.NoConFile\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

[HKEY_CLASSES_ROOT\Python.CompiledFile\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"


From james at reggieband.com  Tue May  6 09:26:42 2008
From: james at reggieband.com (james at reggieband.com)
Date: Tue, 6 May 2008 06:26:42 -0700 (PDT)
Subject: Module to read input from commandline
References: <mailman.649.1210079867.12834.python-list@python.org>
Message-ID: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>

On May 6, 2:11?pm, pyt... at bdurham.com wrote:

> Check out the optparse module as well. The optparse module supercedes(?)
> the cmd module and offers a lot more functionality.

Hi Malcom,

Doesn't the optparse module work by parsing the arguments that are
passed to the script when it is invoked?

What I was looking for was a commandline read loop that executes
within a script that is already running ... or can optparse be used in
this context as well?

Thanks,
James.


From jgardner at jonathangardner.net  Wed May 21 13:48:28 2008
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: Wed, 21 May 2008 10:48:28 -0700 (PDT)
Subject: What replaces `` in py3k?
References: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>
Message-ID: <0ef180ba-6c67-425d-84c3-0b697cde27ea@v26g2000prm.googlegroups.com>

On May 21, 10:45?am, bukzor <workithar... at gmail.com> wrote:
> What are backticks going to be translated into?

repr


From gabriel.rossetti at arimaz.com  Mon May 26 08:32:32 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 14:32:32 +0200
Subject: b64encode and unicode problem
In-Reply-To: <g1e3nn$ddv$01$1@news.t-online.com>
References: <mailman.1606.1211797327.12834.python-list@python.org>
	<g1e3nn$ddv$01$1@news.t-online.com>
Message-ID: <483AADE0.9020708@arimaz.com>

Peter Otten wrote:
> Gabriel Rossetti wrote:
>
>   
>> Hello everyone,
>>
>> I am trying to encode a string using b4encode and I get the following
>> error :
>>
>>  >>> b64encode(u"Salut Pierre, comment ?a va?")
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>>     encoded = binascii.b2a_base64(s)[:-1]
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in
>> position 22: ordinal not in range(128)
>>
>> If I remove the "u" infront of the string, it works. The problem is that
>> I in my program, the string is given to me un unicode/utf-8. I tried
>> several things, but I still get it, How can I get it to work, anybody
>> have any idea?
>>     
>
>   
>>>> base64.b64encode(u"Salut Pierre, comment ?a va?".encode("utf8"))
>>>>         
> 'U2FsdXQgUGllcnJlLCBjb21tZW50IMOnYSB2YT8='
>
> unicode is a sequence of codepoints with no predetermined representation as
> a byte sequence. Therefore whenever you go from unicode to str you have to
> decide upon an encoding. If you don't make that decision python assumes
> ascii which will of course fail for non-ascii characters.
>
> Peter
>
>   
Ok, I get it better now, thanks!
Gabriel



From giuott at gmail.com  Tue May 13 09:17:40 2008
From: giuott at gmail.com (Giuseppe Ottaviano)
Date: Tue, 13 May 2008 15:17:40 +0200
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <579012D4-7B2B-4482-9B20-8B5C404ABCC5@gmail.com>


On May 13, 2008, at 12:28 PM, dannywebster at googlemail.com wrote:

> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
>>>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
>>>> f=str(f)
>>>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]

If the file is really big, you may want not to construct an actual  
list with all the words, but instead use an iterator. If you define  
the function

def ichain(seq):
	for s in seq:
		for x in s: yield x

(which is often useful and I don't think it has been included in  
itertools) you can iterate lazily on the file:

hosts = ichain(s.split() for s in f)
for host in hosts:
	# ...

HTH,
Giuseppe



From bignose+hates-spam at benfinney.id.au  Wed May 21 21:54:42 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 May 2008 11:54:42 +1000
Subject: backport of 'set' to python 2.3?
References: <mailman.1459.1211420324.12834.python-list@python.org>
Message-ID: <871w3vdrx9.fsf@benfinney.id.au>

"Daniel Fetchinson" <fetchinson at googlemail.com> writes:

> Does anyone have a pure python implementation of the builtin 'set'
> object so that I could use that in python 2.3?

Yes. You have one in Python 2.3 already
<URL:http://www.python.org/doc/2.3.5/lib/module-sets.html>, it's just
not a builtin.

> If this would be the case that would be really great as I wouldn't
> have to change my code that runs happily on 2.5

You will, but it's as simple as:

    try:
        set()
    except NameError:
        from sets import Set as set

You then know that 'set' refers to the set type from that point on (or
you're not on a version of Python that has a 'set' type at all).

-- 
 \      "I have a large seashell collection, which I keep scattered on |
  `\        the beaches all over the world. Maybe you've seen it."  -- |
_o__)                                                    Steven Wright |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Mon May 19 20:26:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 21:26:18 -0300
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
Message-ID: <op.ubffh4iwx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 17:58:48 -0300, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> escribi?:

> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
> (snip)
>> The main
>> concept here: identity [usually] implies equality,
>
> I really enjoyed the "usually" disclaimer !-)

In some *rare* cases, identity does not imply equality:

py> inf = 1e300*1e300
py> nan = inf-inf
py> nan
-1.#IND
py> nan is nan
True
py> nan == nan
False

-- 
Gabriel Genellina



From castironpi at gmail.com  Fri May  9 16:17:57 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 13:17:57 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org> 
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com> 
	<sQZUj.125646$rd2.117530@pd7urf3no>
Message-ID: <1c8a388a-4d04-4152-9b6e-3d64d96ec7f0@24g2000hsh.googlegroups.com>

On May 9, 10:11?am, Yves Dorfsman <y... at zioup.com> wrote:
> castiro... at gmail.com wrote:
> > The only thing is, is there is another natural meaning to [a,b:c].
>
> > Counting grids on the diagonals, the rational set is well defined:
>
> > 0: 0, 0
> > 1: 1, 0
> > 2: 0, 1
> > 3: 2, 0
> > 4: 1, 1
> > 5: 0, 2
> > 6: 3, 0
> > 7: 2, 1
> > ...
>
> > Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined. ?Thencefore,
>
> > a,b:c,d
>
> > is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].
>
> I'm not sure what you mean here. Could you give me a simple piece of code to
> show an example ?
>
> Yves.http://www.SollerS.ca- Hide quoted text -
>
> - Show quoted text -

Yves, sadly, simple piece of code is not the writer's forte.  I was
merely advising against leaping in to syntax additions, changes even.
The point was, even though a,b:c,d is shown ill-defined, a,b:c may not
be.


From p.selvaraj2008 at gmail.com  Wed May 14 01:50:10 2008
From: p.selvaraj2008 at gmail.com (p.selvaraj2008 at gmail.com)
Date: Tue, 13 May 2008 22:50:10 -0700 (PDT)
Subject: hai friend
Message-ID: <30014ac9-4022-40c5-965c-87a3eef85c16@l28g2000prd.googlegroups.com>

hai friend how are you i wish to all of your successfull works
and learn more money

www.yourambition.blogspot.com


From mikael at isy.liu.se  Tue May 13 03:12:54 2008
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 13 May 2008 09:12:54 +0200
Subject: passing *args "recursively"
In-Reply-To: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <g0b2ot$mls$1@news.lysator.liu.se>

Guillermo wrote:
> This must be very basic, but how'd you pass the same *args several
> levels deep?
> 
> def func2(*args)
>     print args # ((1, 2, 3),)
>     # i want this to output (1, 2, 3) as func1!
>     # there must be some better way than args[0]?
> 
> def func1(*args):
>     print args # (1, 2, 3)
>     func2(args)
> 
> func1(1,2,3)

func2(*args)

Thats all. See 
http://docs.python.org/tut/node6.html#SECTION006740000000000000000

/MiO


From xahlee at gmail.com  Sun May 25 19:25:33 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Sun, 25 May 2008 16:25:33 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
Message-ID: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>

For about the past 10 years, i have been concerned in the programing
community's level of education in social issues.

I have found that recently, a news that would be of interest to
programers.

There was a bet at longbets.org (run by Long Now Foundation) regarding
the importance of blogs. The bet was made in 2002. The prediction has
a resolution date in 2007.

In 2008, the bet is resolved. See

?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
 http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/

I'd like encourage, for many of you, who have lots of opinions on
technical issues or social issues surrounding software, to make use of
longbets.org. It can help shape your thoughts from blog fart to
something more refined. In any case, your money will benefit society.

here's some examples you could try:

? I bet that Java will be out of the top 10 programing languages by
2020.

? I bet that the top 10 programing languages in 2015 (as determined by
requirement from job search engine), the majority will be those
characterized as dynamic languages (e.g. php, perl, python,
javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
Haskell)).

? You bet that Linux as a desktop system will or will not have a
market share of such and such by the year xyz.

(I'm not sure the above ?predictions? are candidates on longbets.org,
since one of their rule is that the ?predictions? should be socially
important. Looking at existing entries on their site, the social
importance of the above items pale in comparison. (however, many of
their existing ?predictions? are somewhat fringe))

       *       *       *

Note, in almost all online forums where tech geekers gather (e.g.
newsgroups, slashdot, irc, etc), often they are anonymous, each fart
ignorant cries and gripes and heated arguments, often in a
irresponsible and carefree way.

One of the longbets.org's goal is to foster RESPONSIBILITY.

In recent years, i have often made claims that the Python's
documentation, it's writing quality and its documentation quality in
whole, is one of the worst.

Among all the wild claims in our modern world, from the sciences to
social or political issues, my claim about Python's technical writing
quality or its whole quality as a technical documentation, is actualy
trivial to verify by any standards. When presented to intellectuals of
the world at large, the claim's verifiability is trivial, almost as a
matter of fact checking (which are done by interns or newbie grads of
communinication/journalism/literature majors, working for journalism
houses). However, when i voiced my opinion on Python doc among
programing geekers online, it is often met with a bunch of wild cries.
Some of these beer drinking fuckheads are simply being a asshole,
which are expected by the nature of online tech geeking communities (a
significance percentage are bored young males). However, many others,
many with many years of programing experience as a professional,
sincerely tried to say something to the effect of ?in my opinion it's
good?, or voice other stupid remarks to the effect of ?why don't you
fix it?, and in fact find my claim, and its tone too fantastical, to
the point thinking i'm a youngling who are bent on to do nothing but
vandalism. (the tech geekers use in-group slang for this: ?troll?.)

The case of the Python doc is just one example. I have also, in the
past decade, in _appropriate_ online communties (e.g. newsgroups,
mailing lists), voiced opinions on Perl's doc, emacs's doc, criticism
on lisp nested syntax, ?software engineering? issues (e.g. OOP),
various issues of jargons and naming (e.g. currying, lisp1 vs lisp2,
tail recursion, closure), emacs's user interface issues, criticism on
the phenomenon of Open Source community's fervor for bug reporting,
criticism on IT industry celebrities such as Larry Wall and Guido von
Rossum, opinions on cross-posting, ... and others. Some of my claims
are indeed controversial by nature. By that i mean that there is no
consensus on the subject among its experts, and the issue is complex,
and has political implications. However, many trivially verifiable, or
even simple facts, are wildly debated or raised a ruckus, because the
programers are utterly ignorant of basic social knowledge, or due to
their political banding (e.g. a language faction, Open Source) or
current trends and fashions (e.g. OOP, Java, ?Patterns?, ?eXtreme
Programing?, ... , OpenSource and ?Free? software movement, ...).

I think, the founding of Long Now Foundation with its longbets.org,
shares a concern i have on the tech geeking communities. In
particular, tech geekers need to have a broader education on social
sciences, needs to think in long term, and needs to foster personal
responsibility, when they act or voice opinions on their love of
technology. (note: not reading more motherfucking slashdot or
motherfucking groklaw or more great podcasts on your beatific language
or your postmodernistic fuckhead idols)

(One thing you can do, is actually take a course on philosophy,
history, law, economics, in your local community college.)

Disclaimer: I have no affiliation with Long Now Foundation.

       *       *       *

See also:

?Responsible Software Licensing? (2003-07) by Xah Lee
 http://xahlee.org/UnixResource_dir/writ/responsible_license.html

?On Microsoft Hatred? (2002-02-23) Xah Lee
 http://xahlee.org/UnixResource_dir/writ/mshatred155.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From deets at nospam.web.de  Fri May 16 10:18:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 16:18:15 +0200
Subject: writing python extensions in assembly
In-Reply-To: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <695jdlF30fp0gU1@mid.uni-berlin.de>

inhahe schrieb:
> Can anyone give me pointers/instructions/a template for writing a Python 
> extension in assembly (or better, HLA)?

You could write a C-extension and embed assembly. See the docs for how 
to write one. If you know how to implement a C-callingconvention-based 
shared library in assembly (being an assembler guru you sure know how 
that works), you could mimic a C-extension.

Diez


From james at reggieband.com  Tue May  6 08:41:30 2008
From: james at reggieband.com (james at reggieband.com)
Date: Tue, 6 May 2008 05:41:30 -0700 (PDT)
Subject: Module to read input from commandline
References: <2e04b64c-9a12-4e20-8d5a-546a0ec4ac7f@m36g2000hse.googlegroups.com>
	<d094358f-d7c8-411c-8fd0-7896542a0942@a5g2000prg.googlegroups.com> 
	<bcf13695-1e1e-4df3-95ed-fc2e7c7b465c@l28g2000prd.googlegroups.com>
Message-ID: <a9378cd0-3a9d-4b42-81b2-50e991921e13@27g2000hsf.googlegroups.com>

On Apr 13, 9:05?pm, ja... at reggieband.com wrote:
> On Apr 13, 7:44 pm, thashoo... at farifluset.mailexpire.com wrote:
>
> > What you're looking for is no module, it is included in the standard
> > python namespace.
> <snip>
> > raw_input
>
> Thanks for the response GL.
>
> What I am looking for is a module to wrap raw_input so it can handle
> some of the validation.

Looks like I found the module after-all:
http://blog.doughellmann.com/2008/05/pymotw-cmd.html
http://docs.python.org/lib/module-cmd.html

The cmd module does what I want and more.

Just wanted to post this in-case someone finds this through a search.

cheers,
James


From gnewsg at gmail.com  Sun May  4 14:38:06 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sun, 4 May 2008 11:38:06 -0700 (PDT)
Subject: Determine socket family at runtime
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
	<pan.2008.05.04.17.18.39.99752@virgilio.it>
Message-ID: <43a969df-0098-4fab-a736-fb92d5b75aca@26g2000hsk.googlegroups.com>

On 4 Mag, 19:18, Francesco Bochicchio <bock... at virgilio.it> wrote:
> On Sun, 04 May 2008 08:49:55 -0700, Giampaolo Rodola' wrote:
> > Hi there,
> > since the socket.socket.family attribute has been introduced only in
> > Python 2.5 and I need to have my application to be backward compatible
> > with Python 2.3 and 2.4 I'd like to know how could I determine the
> > family of a socket.socket instance which may be AF_INET or AF_INET6.
> > Is there some kind of getsockopt() directive I could use?
> > For now I've been able to determine the family by using:
>
> > # self.socket = a connected socket.socket instance
> > ip, port = self.socket.getsockname()[0:2]
> > af = socket.getaddrinfo(ip, port)[0][0]
>
> > ...but I'd like to know if some other solution is preferable.
>
> > Thanks.
>
> > --- Giampaolo
> >http://code.google.com/p/pyftpdlib
>
> Ciao,
>
> what about wrapping the socket type and ?adding a 'family' attribute
> to the base socket class? Something like:
>
> class SocketWrapper(socket.socket): ? ?def __init__(self, family, type, proto=0): ? ? ? ? ? ? socket.socket.__init__(self, family, type, proto) ? ? ? ? ? ? ?self.family = family
>
> then you have just to create the sockets with SocketWrapper insetead of
> socket.socket. For the rest of your code it would not matter, and then you
> are sure to always have a .family attribute.
>
> Ciao
> ----
> FB- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Ciao,
I don't think that it would be possible since the socket I'm talking
about is returned by socket.socket.accept().


--- Giampaolo
http://code.google.com/p/pyftpdlib


From jcd at sdf.lonestar.org  Fri May 16 10:15:33 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 16 May 2008 10:15:33 -0400
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
	<9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
Message-ID: <1210947333.3766.9.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-16 at 06:04 -0700, globalrev wrote:
> On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
> > Christian Heimes wrote:
> > > globalrev schrieb:
> > >> cust1 = customer.__init__('12',['1','435','2332'])
> >
> > > cust1 = customer('12',['1','435','2332'])
> >
> > ... and before that
> >
> > from customer import customer
> >
> > Peter
> 
> why do i have to write that?
> 
> if i do import customer im importing everything no?
> 

Not exactly.  That's how perl and PHP tend to do it, but python's import
system is much more conservative (and far superior because of it).  When
you import a name you get that name and nothing else.  You can still
call your class without doing from customer import customer, but you
have to include the module in the class name like this:

cust1 = customer.customer('12',['1','435','2332'])

Everything stays hidden behind the name customer.  That way, if customer
defines a class that has the same name that you already have in your
namespace, it won't get overwritten.  Say you define a class Purchase in
your customer module, and then in the interpreter, you write

py>>> import customer
py>>> Purchase = 4
py>>> bread = customer.Purchase('bread')
py>>> Purchase
4
py>>> bread
<customer.Purchase object at 0xabcdefab>
py>>>

Purchase and customer.Purchase can live happily side by side.  In perl
or PHP, the default behavior causes errors which are hard to debug
because you can't see what names are being pulled into your namespace.

> but youre right it doesnt work unless i do, i just dont get why.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From workitharder at gmail.com  Wed May 21 13:45:58 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 10:45:58 -0700 (PDT)
Subject: What replaces `` in py3k?
Message-ID: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>

In Python 3, backticks (``) are being removed. The plan is to create
an automatic way to port python2 programs to python3, so my question
is:

What are backticks going to be translated into? I tried looking at the
2to3 fixer source code, but as far as I can tell they haven't written
that part yet.

http://svn.python.org/view/sandbox/trunk/2to3/lib2to3/fixes/



From bj_666 at gmx.net  Fri May 30 02:02:42 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 May 2008 06:02:42 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
Message-ID: <6a9jk2F364dj7U1@mid.uni-berlin.de>

On Thu, 29 May 2008 17:57:45 -0400, D'Arcy J.M. Cain wrote:

> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?

By discussing language design of FT compared to other languages you can
learn about Python.  We all know that Python is brilliant -- here's the
opportunity to think about why it is.  :-)

And it's basically only this very long thread, so it's easy to filter and
ignore in a decent news reader.

Ciao,
	Marc 'BlackJack' Rintsch


From matthieu.brucher at gmail.com  Sun May 11 18:17:34 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Mon, 12 May 2008 00:17:34 +0200
Subject: Some error messages in Python are ugly
In-Reply-To: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <e76aa17f0805111517i1b2556efsc9cf4d027df4ef77@mail.gmail.com>

Please, really please, stop asking question and go read some books about/get
some courses on Linux shell and then finally Python.
Before you do that, the only thing will have is upset people telling you to
_think_ (clearly that's something you are n,ot used to do, but you will have
to start at some point) before sending a mail.

Matthieu

2008/5/11 <wxPythoner at gmail.com>:

> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From basti.wiesner at gmx.net  Sat May 31 10:39:21 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 16:39:21 +0200
Subject: File browser in python gui
References: <4841353e_1@news.tm.net.my>
Message-ID: <g1rnuq$fqj$03$1@news.t-online.com>

[ TheSaint <fc14301589 at icqmail.com> ]


> I've started to build a GUI for my Mailsweeper by the help of QT4
> Designer. I came across the problem that there isn't any prebuild file
> browser like Kdialog.
> I know some other sample, but PyGTK builded. I'm not happy to use a
> different widget set or to have to design my own file browser with QT4
> widgets. It's almost thousand times people need to use such browser, I
> wonder why I couldn't find one on the entire day searching on web site.
> A QT XML file (.ui extension) should do fine, if someone would help :)

What about QtGui.QFileDialog?

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Tue May  6 06:37:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:37:39 +0200
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
Message-ID: <68aqoeF2rue80U1@mid.uni-berlin.de>

spectrumdt at gmail.com wrote:

> Hello.
> 
> I am trying to install Pypvm (http://pypvm.sourceforge.net/), the
> Python interface to PVM ("Parallel Virtual Machine"). Unfortunately,
> installation fails. I am hoping someone can help me fix it.
> 
> I am running Fedora Core 8 Linux.
> 
> The official Pypvm documentation is very helpful (or something),
> providing the following:
> 
> 
> 
> To build Pypvm, cross your fingers and try:
> 
> make -f Makefile.pre.in boot
> make
> 
> Or alternatively, try
>   python setup.py build
>   python setup.py install
> 
> 
> 
> For me, the "make -f Makefile.pre.in boot" seems to run fine, but the
> "make" fails, giving (among other things) the following:
> 
> 
> 
> [ore at localhost pypvm-0.94]$ make
> gcc -pthread -fPIC -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
>   -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -
> march=i386
>   -mtune=generic -fasynchronous-unwind-tables -D_GNU_SOURCE -fPIC
>   -I/usr/include/python2.5 -I/usr/lib/python2.5/config    -c
>   ././pypvm_coremodule.c -o ./pypvm_coremodule.o
> ././pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
> ././pypvm_coremodule.c: In function ?was_error?:
> ././pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in
> this function)
> ././pypvm_coremodule.c:81: error: (Each undeclared identifier is
> reported only once
> ././pypvm_coremodule.c:81: error: for each function it appears in.)
> ././pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use
> in this function)
> ././pypvm_coremodule.c:85: error: ?PvmMismatch? undeclared (first use
> in this function)
> [...]
> ././pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first
> use in this function)
> ././pypvm_coremodule.c:1767: warning: unused variable ?optModule?
> ././pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
> ././pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
> ././pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
> ././pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
> ././pypvm_coremodule.c:1762: warning: unused variable
> ?exceptionModule?
> make: *** [pypvm_coremodule.o] Error 1
> [ore at localhost pypvm-0.94]$
> 
> 
> 
> In in alternate version, "python setup.py build" similarly fails:
> 
> 
> 
> [ore at localhost pypvm-0.94]$ python setup.py build
> running build
> running build_py
> running build_ext
> building 'pypvm_core' extension
> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-
> D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
> size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables -
> D_GNU_SOURCE -fPIC -fPIC -I/usr/include -I/usr/include/python2.5 -c
> pypvm_coremodule.c -o build/temp.linux-i686-2.5/pypvm_coremodule.o
> pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
> pypvm_coremodule.c: In function ?was_error?:
> pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in this
> function)
> pypvm_coremodule.c:81: error: (Each undeclared identifier is reported
> only once
> pypvm_coremodule.c:81: error: for each function it appears in.)
> pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use in
> this function)
> [...]
> pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first use in
> this function)
> pypvm_coremodule.c:1767: warning: unused variable ?optModule?
> pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
> pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
> pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
> pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
> pypvm_coremodule.c:1762: warning: unused variable ?exceptionModule?
> error: command 'gcc' failed with exit status 1
> [ore at localhost pypvm-0.94]$
> 
> 
>
> Can anyone help me get it to work?

You need to check which package provides the  "pvm3.h"-include-file and
install that. Usually, these are *-dev(el)?-packages.

Diez


From __peter__ at web.de  Thu May 22 02:11:11 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 May 2008 08:11:11 +0200
Subject: Bit of List replacing trouble (newbie)
References: <mailman.1463.1211432419.12834.python-list@python.org>
Message-ID: <g132pv$89v$01$1@news.t-online.com>

Zethex wrote:

> At the moment i'm doing a piece of work for school and I'm stuck at the
> moment.
> 
> I have a list of words, for example:
> 
> Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']
> 
> I have another list which I need to use to replace certain words, and its
> in the form of:
> 
> synonyms = [
>                   [canine, [dog, puppy, bulldog]],
>                   [ road, [street, avenue, court]]
>                                                              ]
> What the procedure must do is replace dog with canine, and street with
> road. Therefore if a word is in the sentence and appears on the right side
> of the list entry, replace it with the left entry.
> 
> I can't seem to find a help file with what I'm after.  I'm just wondering
> if anyone can help me on the right track on how to start this procedure,
> maybe not an answer but just a little help on how to get started as I'm
> complete stuck right now.

See if you can put the synonyms in a dict:

syndict = {"dog": "canine", "puppy": "canine", ..., "court": "road"}

The code to achieve that should consist of two nested loops. 
You can then look up a word easily with

word = syndict.get(word, word) 

Put that into another loop iterating over the words of the original sentence
and build the new sentence by appending to a fresh list.

Peter



From gagsl-py2 at yahoo.com.ar  Fri May  2 12:35:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 13:35:44 -0300
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<4819B2F1.9030100@cheimes.de>
Message-ID: <op.uajcdurhx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 09:09:21 -0300, Christian Heimes <lists at cheimes.de>  
escribi?:

> illume schrieb:
>> Has anyone tested the new python binaries that link to msvcr90.dll on
>> win9x machines?
>
> It doesn't matter to use because Python 2.6 and 3.0 require at least
> Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.

That should be menctioned in the What's new? document - I could not find  
any reference.

-- 
Gabriel Genellina



From svetoslav.agafonkin at gmail.com  Sat May  3 07:52:01 2008
From: svetoslav.agafonkin at gmail.com (svetoslav.agafonkin at gmail.com)
Date: Sat, 3 May 2008 04:52:01 -0700 (PDT)
Subject: How to use a parameter in a class
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <9ea30fa0-7c79-46a7-a4af-d0a5e73bcf73@e53g2000hsa.googlegroups.com>

On May 3, 1:05?pm, Decebal <CLDWester... at gmail.com> wrote:
> I have the following class:
> #####
> class Dummy():
> ? ? value = 0
> ? ? def __init__(self, thisValue):
> ? ? ? ? print thisValue
> ? ? ? ? self.value = thisValue
> ? ? ? ? value = thisValue
>
> ? ? def testing(self):
> ? ? ? ? print 'In test: %d' % self.value
>
> ? ? def returnValue(self):
> ? ? ? ? return self.value
>
> ? ? result = someFuntion(default = value)
> #####
>
> But the last line does not work.
> I would like to do a call like:
> ? ? dummy = Dummy(thisValue = 12)
>
> And that someFunction gets a default value of 12. How can I do that?

The line
>     result = someFuntion(default = value)
is executed when the whole 'class' compound statement is executed,
i.e.
before the line that creates the 'dummy' instance. Moreover, this
happens only once and not every time you create a new instance of
the class. If you want 'result' to be a class attribute that is set
every time you create a new instance move the line
>     result = someFuntion(default = value)
in the __init__ constructor (you also have to assign some value to it
before,
just like the 'value' attribute and preffix it with Dummy. otherwise
it'll
be considered as local name of __init__):

 class Dummy():
     value  = 0
     result = 0

     def __init__(self, thisValue):
         print thisValue
         self.value   = thisValue
         Dummy.value  = thisValue
         Dummy.result = someFuntion(default = Dummy.value)

    def testing(self):
        ...


From workitharder at gmail.com  Fri May 23 02:26:59 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 23:26:59 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
Message-ID: <9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>

On May 22, 5:29?pm, "inhahe" <inh... at gmail.com> wrote:
> "bukzor" <workithar... at gmail.com> wrote in message
>
> news:55bc8846-107e-461a-89de-25c83cbcfa27 at 2g2000hsn.googlegroups.com...
>
> > This question seems easy but I can't figure it out.
> > Lets say there's a function:
>
> > def f(a, *args):
> > ? ?print a
> > ? ?for b in args: print b
>
> > and elsewhere in your program you have a list and a dict like this:
> > args = [2, 3]
> > kwargs = {'a':1}
>
> > I'd like to get f() to print something like the following, but I can't
> > figure out how.
> > 1
> > 2
>
> I think there's no 'standard' way to do this. but:
>
> import inspect
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>
> i don't know if it works because i'm afraid to try it. ?if it doesn't the
> solution is something similar to that.

That does, in fact work. Thanks! I'm a little sad that there's no
builtin way to do it, owell.

>>> def f(a, *args):
...     print a
...     for b in args: print b
...
>>> import inspect
>>> a = [2,3]
>>> b = {'a':1}
>>> inspect.getargspec(f)
(['a'], 'args', None, None)
>>> map(b.get, inspect.getargspec(f)[0])
[1]
>>> map(b.get, inspect.getargspec(f)[0]) + a
[1, 2, 3]
>>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
1
2
3


From ppearson at nowhere.invalid  Fri May 30 10:50:36 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Fri, 30 May 2008 09:50:36 -0500
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
	<CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>
Message-ID: <lcudnS3wCdehid3VnZ2dnUVZ_uednZ2d@supernews.com>

On Thu, 29 May 2008 20:27:35 -0500, Larry Bates wrote:
> abhishek wrote:
>> Hi group, recently my employer asked me too implement encryption/
>> decryption for secure data transfer over internet. Problem is that the
>> client application is written using C# and the webserver where i need
>> to store the information is developed using python.
>> 
>> My situation of dilemma is which cryptographic method suits me best
>> for this purpose.
>> 
>> Help/Suggestions are urgently required

The proper newsgroup for this question is sci.crypt.

Data security is a complex and difficult problem, and you are likely
to fail in the worst possible way: implementing something that is
weak but that you believe to be strong.  Some advice: (1) Use
off-the-shelf products like PGP or GPG; don't write your own.
(2) Read Bruce Schneier's Applied Cryptography to get a feeling
for the dimensions of the problem. (3) Start by composing a
clear statement of what you need, avoiding vague terms like
"security".  If you don't know where you're going, you can't
tell whether you've arrived.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From jcd at sdf.lonestar.org  Fri May  9 12:08:17 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 12:08:17 -0400
Subject: A question about python and xml
In-Reply-To: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
References: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
Message-ID: <1210349297.3332.53.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-09 at 08:39 -0700, Holden wrote:
> Hello everyone I heard this was a good community to go too for help
> and advice. I want to make a web site that uses the python programming
> language which I am VERY new at. This website would store simple data
> such as names in a form. At first I wanted to use mysql to store the
> data but I want to export the data using xml.
> 
> So say if a user logged in they would be able to store there basic
> information in an xml file and download it whenever. Is that possible
> using XML and Python. I am sorry if this post doesn't make much sense
> but any advice would be greatly appreciated. You can also e-mail me if
> you need further information or clarification.
> 
> Thanks
> 
> Holden
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

A general question will only get you a general answer, but yes, it's
very possible.  

You'll want to look into the cgi module (in the standard library)for
basic, ground level server/browser communication.  You might also be
interested in using a web framework, for keeping your site design clean
and manageable.  I recommend Django from my own experience, but you
might also look into turbogears, pylons, webpy, or any of a number of
other well-regarded options.  The downside to using a framework is that
it's another set of things to learn, which, if you're just starting out
with python, might be a bit much to chew, but they can be very helpful
with maintenance down the line.

For XML processing, lxml.etree or ElementTree should suit your needs.
ElementTree is included in the standard library of recent versions of
python, though lxml is easily downloadable, and adds a couple bells and
whistles.  There are other options available, but those are
straightforward to use, and well designed.

Good luck with your site.

Cheers,
Cliff




From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:25:47 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:25:47 +0200
Subject: [x for x in <> while <>]?
In-Reply-To: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <482be56f$0$10798$426a34cc@news.free.fr>

urikaluzhny a ?crit :
> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is
> there?

The answer is very probably in the itertools module.



From jym at cornsoft.com  Sun May  4 10:58:42 2008
From: jym at cornsoft.com (jym)
Date: Sun, 4 May 2008 09:58:42 -0500
Subject: Writing a aiff audio file problem?
Message-ID: <5078ba20805040758m3d5a5a00p9e7394b0e635e300@mail.gmail.com>

Hi all

I can not creat a usable audio file in the aiff format. The example code
below creates a wav file that I can listen to just fine. However, I just get
noise when I listen to the resulting aiff file. Is this a byte order
problem? I am using Python 2.5.2 on Windows XP. Any guidance on this issue
would be appreciated.

Thanks

jym

import pyaudio
import wave
import sys
import aifc

chunk = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 8000
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output"

p = pyaudio.PyAudio()

stream = p.open(format = FORMAT,
                channels = CHANNELS,
                rate = RATE,
                input = True,
                frames_per_buffer = chunk)

print "* recording"
all = []
for i in range(0, RATE / chunk * RECORD_SECONDS):
    data = stream.read(chunk)
    all.append(data)
print "* done recording"

stream.close()
p.terminate()

#write data to AIFF file
data = ''.join(all)
af = aifc.open(WAVE_OUTPUT_FILENAME + ".aiff", 'wb')
af.setnchannels(CHANNELS)
af.setsampwidth(p.get_sample_size(FORMAT))
af.setframerate(RATE)
af.writeframes(data)
af.close()

# write data to WAVE file
wf = wave.open(WAVE_OUTPUT_FILENAME + ".wav", 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(data)
wf.close()
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From prisoner_at_war at yahoo.com  Mon May 26 01:06:02 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Sun, 25 May 2008 22:06:02 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
Message-ID: <248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>

On May 25, 8:37 pm, "drobi... at gmail.com" <drobi... at gmail.com> wrote:
>
>
> See  http://www.python.org/dev/peps/pep-3105/
> That should answer all your questions.

Hey, thanks, I missed that one!

Not that I understand the rationale given (iman00b), but oh well, so
it looks like a real function now.

Might you have any idea, BTW, whether the upcoming "Head First
Programming" from O'Reilly, coming in August, will cover Python 3??
Unlikely, right?  Unless maybe if that guy Vern Ceder (the author) is
active in the Python development community??

I'd already pre-ordered the book...but it makes no sense to get a book
on "old" Python 2.x if it's just going to get deprecated in like a
year or two!  Then again, current Python programs would still work,
right?  I mean, once it's been done up as an executable...PySol or
something should still work, right?  (Sorry, iman00b, I don't really
know how this stuff works....)


From kyosohma at gmail.com  Mon May 26 20:36:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 26 May 2008 17:36:49 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com> 
	<g1fe4u$2cld$3@news.mtu.ru>
Message-ID: <dd0d8550-192b-4abe-9954-efa9070082c8@x41g2000hsb.googlegroups.com>

On May 26, 5:38?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:
> > On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> >> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> >> > > Thanks!
> >> > > Anyone know which library should i learn then?
>
> >> > Looks like you need to dive into Win32
> >> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
>
> (VS.85).aspxhttp://ms...
>
> >> > and others
> >> > combined with ctypes.
>
> >> > Ivan
>
> >> well, that seems extremely valuable but how can i implement those
> >> functions with python?
>
> > You know what I'm sorry, I will try to understand the ctypes lib before
> > bothering you.
>
> > thank you all!
>
> No need to sorry. I have actually found very valuable information athttp://www.brunningonline.net/simon/blog/archives/000652.html
> while googling to answer your question. I didn't know that such things
> are really possible with Python/Win32! It'll help me a lot. Thank you!
>
> Ivan

If you guys are going to go digging into the PyWin32 modules, make
sure you check this site out:

http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/pywin32/PyWin32.html

It has the docs for the distro and a link to the user's group too. Bot
have been very helpful to me.

Mike


From rocky at panix.com  Thu May 15 15:07:18 2008
From: rocky at panix.com (R. Bernstein)
Date: Thu, 15 May 2008 15:07:18 -0400
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
	<wihr6c33j1s.fsf@panix5.panix.com>
	<16f79f5a-ef95-41ce-a58d-3b513e201d35@56g2000hsm.googlegroups.com>
Message-ID: <wihr6c35qu1.fsf@panix5.panix.com>

castironpi <castironpi at gmail.com> writes:

> On May 15, 6:26?am, ro... at panix.com (R. Bernstein) wrote:
>> "Alan J. Salmoni" <salm... at gmail.com> writes:
>>
>> > I'm not sure if this is exactly what you're after, but try looking
>> > into the 'code' module.
>>
>> > It's fairly easy to make an interactive interpreter that runs within
>> > your program. If you import your programs variables into
>> > __main__.__dict__, you can have access to them which can be funky. You
>> > can even override the showtraceback method to catch various exceptions
>> > and do daft things like adding new methods to strings. I guess it
>> > would even be possible to have the commands compared to a list of
>> > commands and keywords to build a restricted interpreter, though how
>> > secure this would be against a determined attack is another matter.
>>
>> > Alan
>>
>> I think this (largely) does the trick. Thanks!
>>
>> I'm not sure about how to deal with globals yet which should come from
>> a stackframe f_globals. It might be possible to save and restore
>> __main__.__dict__ before and after the call to interact(). Probably
>> would have been cooler to design interact() to take a globals
>> parameter, same as eval does.
>>
>>
>>
>>
>>
>> > On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
>> >> The next release of pydb will have the ability to go into ipython from
>> >> inside the debugger. Sort of like how in ruby-debug you can go into
>> >> irb :-)
>>
>> >> For ipython, this can be done pretty simply; there is an IPShellEmbed
>> >> method which returns something you can call. But how could one do the
>> >> same for the stock python interactive shell?
>>
>> >> To take this out of the realm of debugging. What you want to do is to
>> >> write a python program that goes into the python interactive shell -
>> >> without having to write your own a read/eval loop and deal with
>> >> readline, continuation lines, etc.
>>
>> >> The solution should also allow
>> >> ?- variables/methods in the calling PYthon program to be visible
>> >> ? ?in the shell
>> >> ?- variables set in the interactive (sub) shell should persist after the shell
>> >> ? ?terminates, although this is a weaker requirement. POSIX subshells
>> >> ? ?for example *don't* work this way.
>>
>> >> There has been much written about how to embed Python from C, so I
>> >> suppose this may offer one way. And at worst, I could write
>> >> a C extension which follows how C Python does this for itself.
>>
>> >> But is there a simpler way?
>>
>> >> Thanks.- Hide quoted text -
>>
>> - Show quoted text -
>
> One threat is malicious code; sorry for this.

This is a little too cryptic for me. But then if we're talking
security, maybe obfuscation is in order. :-)

If this was meant as an explanation for why interact() only takes a
local parameter and none for global, security concerns are in fact why
you'd want to *add* that parameter: so that the caller could more easily
decide what interact sees as global. I haven't tried implementing a
__main__.__dict__ save, modify and restore around the interact(), but
I'll assume that this could be made to work.

If instead this was about the evils of writing a program that uses
code and calls interact, in general, debuggers and security are at
odds. In a highly secure environment, you probably want to disallow
any trace hook.  I think Ruby uses the global variable $SAFE with a
particular level setting for this purpose.


From cwitts at gmail.com  Wed May  7 06:14:55 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 7 May 2008 03:14:55 -0700 (PDT)
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
Message-ID: <3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com>

On May 7, 1:09?am, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson ?
>
> <mcrobert... at hotmail.com> wrote:
> > I'm having trouble opening a file in linux, whose path has spaces in it.
>
> > $ mkdir my\ test
> > $ echo test > my\ test/test.txt
> > $ python
>
> > ?>>> open('./my test/test.txt')
> > Exception
> > ?>>> open('./my\\ test/test.txt')
> > Exception
>
> Try a string literal by prefixing your path string with "r":
>
> open(r'./my test/test.txt')
>
> Seehttp://docs.python.org/ref/strings.html
>
> > but yet...
>
> > ?>>> import os
> > ?>>> os.chdir('./my test')
> > ?>>> open('./test')
>
> > works just fine.
>
> Couldn't test on Linux, but in Windows ...
>
> >>> os.chdir('C:\temp\my test')
>
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume label ?
> syntax is incorrect: 'C:\temp\\my test'
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

>>> os.chdir('C:/')
>>> os.getcwd()
'C:\\'
>>> os.chdir('C:\temp\my test')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
WindowsError: [Error 123] The filename, directory name, or volume
label syntax is incorrect: 'C:\temp\\my test'
>>> os.chdir('C:/temp/my test')
>>> os.getcwd()
'C:\\temp\\my test'

Windoze works fine if you hand it forward slashes.

>>> os.chdir('C:/')
>>> os.chdir(os.path.join('C:','temp','my test'))
>>> os.getcwd()
'C:\\temp\\my test'

And joining your target with os.path.join works to.


From bhawsar.vaibhav at gmail.com  Mon May  5 07:26:45 2008
From: bhawsar.vaibhav at gmail.com (Vaibhav.bhawsar)
Date: Mon, 5 May 2008 07:26:45 -0400
Subject: threading: getting latest elements from list/dict
In-Reply-To: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
References: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
Message-ID: <17d58cc40805050426w3282bb3eyc9c1831d1d37d705@mail.gmail.com>

Hello
I have a thread updating a dictionary with new elements. How can I check for
new elements as they are inserted into the dictionary by the thread? In
general is it safe to read a dictionary or a list while it is being updated
by a running thread? Does the dictionary or list have to be locked while
reading?
many questions! :)
vaibhav
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From Scott.Daniels at Acm.Org  Sat May 24 09:49:20 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 24 May 2008 06:49:20 -0700
Subject: Unhandled exceptions checking
In-Reply-To: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <h4-dnbKmk4hWh6XVnZ2dnUVZ_u2dnZ2d@pdx.net>

Yosifov Pavel wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?

I've seen this a number of places.  Apparently there are a number
of programmers who find exceptions to be a problem to suppressed,
rather than an indicator of a deeper bug.  Your goal should be to
handle anticipatable problems where you can, and reveal the others,
not to make sure you cannot raise an exception.  Exceptions are
valuable in that they reveal "thinko"s, embrace what they tell you,
and don't look for mechanical ways to avoid them; test them out.

--Scott David Daniels
Scott.Daniels at Acm.Org


From max at alcyone.com  Sat May  3 17:14:23 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:14:23 -0700
Subject: list.index crashes when the element is not found
In-Reply-To: <6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
Message-ID: <8oudnccY4MgvSIHVnZ2dnUVZ_rzinZ2d@speakeasy.net>

Jeff wrote:

> The generally used idiom for that is:
> 
> lst = ['a', 'b', 'c']
> if 'a' in lst:
>   foo = lst.index('a')

It's not a very good idiom, since it iterates over the list twice 
unnecessarily:  first, to see if the object is in the list; then, to 
find the index of that object.  That's pointless wasteful.

The Pythonic idiom is to catch the exception and then deal with it as 
desired.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From arnodel at googlemail.com  Mon May 12 11:15:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 08:15:31 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
Message-ID: <caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>

On 12 May, 15:21, Mark Dickinson <dicki... at gmail.com> wrote:
> On May 12, 2:09?am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> > It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well
> > defined whether y is 0 or not, even though there is a discontinuity in the
> > limit.
>
> Well, there's a difference: ?the limit of exp(y*log(x)) as (x, y) ->
> (0, a) exists for all finite nonzero a. ?The limit as (x, y) ->
> (0, 0) doesn't.

But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
which is not the x=0 axis (I think at least - it seems easy to prove
that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).  This should cover
most practical uses?

--
Arnaud


From mark.deverter at dads.state.tx.us  Tue May 20 15:32:32 2008
From: mark.deverter at dads.state.tx.us (Deverter,Mark)
Date: Tue, 20 May 2008 14:32:32 -0500
Subject: subscribe
Message-ID: <C98621D17B337E4284E03A4BAA76F6A53006F981@ausmis09.dhs.state.tx.us>

 

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From rdahlstrom at directedge.com  Thu May 29 07:03:40 2008
From: rdahlstrom at directedge.com (Dahlstrom, Roger)
Date: Thu, 29 May 2008 07:03:40 -0400
Subject: [python-win32] How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>

-----Original Message-----
> From: python-win32-bounces at python.org [mailto:python-win32-bounces at python.org] On Behalf Of Tim Golden
> Sent: Thursday, May 29, 2008 4:11 AM
> To: Python-Win32 List; python-list at python.org
> Cc: Python-Win32 List
> Subject: Re: [python-win32] How to get all the variables in a python shell
> 
> lixinyi.23 at gmail.com wrote:
> > I'm currently working on a scientific computation software built in
> > python.
> > What I want to implement is a Matlab style command window <->
> > workspace interaction.
> > 
> > For example, you type 'a=1' in the command window, and you see a list
> > item named 'a' in the workspace.
> > You double click the icon of the item, and you see its value. You can
> > modify the value of the list item,
> > 1 -> 100 etc,  after which if you go back to the command window and
> > type 'a'  and press enter, you see that
> > varable a's value has been changed to 100.
> > 
> > So my question is : if you have two DOS command windows running under
> > WINDOWS OS, how can you make them share the same internal variable
> > buffer? Or is there any easier way to implement such kind of
> > interaction?
> 
> I stronly suggest you look at IPython [1]. To do what I think
> you're describing, you'd need to hack or reimplement the interpreter.
> And that's what they've done. ISTR that they even have a branch
> which is dealing with parallel instances.
> 
> TJG
> 
> [1] http://ipython.scipy.org/moin/
> _______________________________________________
> python-win32 mailing list
> python-win32 at python.org
> http://mail.python.org/mailman/listinfo/python-win32


I'd try looking at memcached (http://www.danga.com/memcached/apis.html).  No hacking or reimplementation of the interpreter would be necessary, and there's a
Python api available.  I haven't used it for anything production related, but I have played with it a bit, and it's fast and stable.



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From bearophileHUGS at lycos.com  Sun May 25 17:39:28 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 25 May 2008 14:39:28 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com> 
	<83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>
Message-ID: <59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>

This may have some bugs left, but it looks a bit better:

from inspect import getargspec

class HashableFunction(object):
    """Class that can be used to wrap functions, to allow their
hashing,
    for example to create a set of unique functions.

    >>> func_strings = ['x', 'x+1', 'x+2', 'x']
    >>> func_list1 = [eval('lambda x:' + func) for func in
func_strings]
    >>> func_set = set(HashableFunction(f) for f in func_list1)
    >>> len(func_set)
    3
    >>> set(f(10) for f in func_set) == set([10, 11, 12])
    True

    >>> func_list2 = [lambda x=1: x, lambda x: x]
    >>> len(set(HashableFunction(f) for f in func_list2))
    2

    >>> class Foo:
    ...   def __eq__(self, other): raise NotImplementedError
    >>> func_list3 = [lambda x=Foo(): x, lambda x=Foo(): x]
    >>> set(HashableFunction(f) for f in func_list3)
    Traceback (most recent call last):
      ...
    NotImplementedError
    """
    # Original code by I V <ivlenin at gmail.com>, 25 May 2008,
    # http://groups.google.com/group/comp.lang.python/browse_thread/thread/a973de8f3562675c
    # modified by bearophile
    def __init__(self, func):
        self._func = func
        signature = getargspec(func)
        self._hash = hash(self._func.func_code) ^ \
                     hash(tuple(signature[0]) + tuple(signature[1:3]))
    def __eq__(self, other):
        return self._func.func_code == other._func.func_code and \
               getargspec(self._func) == getargspec(other._func)
    def __hash__(self):
        return self._hash
    def __call__(self, *args, **kwargs):
        return self._func(*args, **kwargs)

I haven't put a full hashing of getargspec(self._func) too into the
__init__() because it may contain too much nested unhashable
structures, but the __eq__() is able to tell them apart anyway, with
some collisions.

Bye,
bearophile


From bruno.desthuilliers at gmail.com  Fri May 16 17:34:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:34:58 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
Message-ID: <fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>

On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
> Dan Upton wrote:
> > for pid in procs_dict:
> >   if procs_dict[pid].poll() != None
> >    # do the counter updates
> >    del procs_dict[pid]
>
> > The problem:
>
> > RuntimeError: dictionary changed size during iteration
>
> I don't know if the setup with the pids in a dictionary is the best way to
> manage a pool of processes... I'll leave it others, presumably more
> knowledgable, to comment on that. :-)  But I can tell you how to solve the
> immediate problem:
>
>    for pid in procs_dict.keys():

I'm afraid this will do the same exact thing. A for loop on a dict
iterates over the dict keys, so both statements are strictly
equivalent from a practical POV.


From deets at nospam.web.de  Thu May 22 06:57:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 12:57:19 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
	<f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>
Message-ID: <69l1teF33eaduU1@mid.uni-berlin.de>

> 
> This person who started this thread posted the calculations showing
> that Python was doing the wrong thing, and filed a bug report on it.
> 
> If someone pointed out a similar problem in Flaming Thunder, I would
> agree that Flaming Thunder was doing the wrong thing.
> 
> I would fix the problem a lot faster, though, within hours if
> possible.  Apparently this particular bug has been lurking on Bugzilla
> since 2003: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323

I wonder how you would accomplish that, given that there is no fix.

http://hal.archives-ouvertes.fr/hal-00128124

Diez




From cjw at ncf.ca  Thu May  8 09:51:26 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 09:51:26 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <mailman.767.1210253316.12834.python-list@python.org>
References: <fvut8a$b67$1@theodyn.ncf.ca>
	<mailman.767.1210253316.12834.python-list@python.org>
Message-ID: <4823055E.9090207@ncf.ca>

Gabriel Genellina wrote:
> En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:
> 
>> The readme.txt has:
>>
>> All you need to do is open the workspace
>> "pcbuild.sln" in Visual Studio,
>> select the desired combination of
>> configuration and platform and eventually
>> build the solution. Unless you are going
>> to debug a problem in the core or
>> you are going to create an optimized
>> build you want to select "Release" as
>> configuration.
>>
>> Unfortunately, the Express Edition
>> (Free) doesn't handle "solution" files.
> 
> Yes, it does. You get a warning saying that solution *folders* aren't supported; that just means that you won't see those 26 projects nicely grouped, only as a long list, that's all... Python builds fine with Visual C++ Express Edition.
> Select Release, Win32 from the dropdown lists, press F7, and wait for compilation to complete...
> 
Many thanks.  Yes, you are right.

Colin W.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:37:01 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:37:01 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <48240d2d$0$30967$426a34cc@news.free.fr>

Raxit at MyKavita.com a ?crit :
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#.


Err... You saw a Python helloworld and a Java helloworld and you found 
them "very similar" ???

> What's different (except
> syntax) ?

dynamism (and not only wrt/ the type system), higher order functions, 
closures, lazy evaluation... and fun.

> what can i do easily with python which is not easy in c++/java !?

Enjoy writing a working app focusing on the problem to solve instead of 
wasting time writing boilerplate code and going thru hoops just to 
satisfy the compiler.


From alan.wright at volubill.com  Wed May 21 06:47:59 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 11:47:59 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>

Thanks Roy

Any ideas how to code this child process stuff, as I said I am newbie and 
not from a coding background

to be honest ideally yes, i'd get 50K, but if i can get above 30K that would 
be OK

Alan

"Roy Smith" <roy at panix.com> wrote in message 
news:roy-27A881.20583919052008 at 70-1-84-166.area1.spcsdns.net...
> In article <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d at pipex.net>,
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks for the feedback.
>>
>> Using the socket in a list is great
>>
>> However, as i imagined, I now get a limit of around 1500 conns before the
>> system crashes out, also i have noticed, that the ports loop back to 1025
>> when they hit 5000.
>>
>> Any ideas on how to make the list/socket get to around 50K
>
> Yikes.  Not on any box I know of.  A given process is limited in how many
> descriptors it can have open at once.  I don't know of any that will allow
> anywhere near 50k.  Somewhere in the 1-2000 range would be more typical.
> The 1500 you report is not at all surprising.
>
> You might try creating a bunch of child processes with os.system() or
> something of that ilk.  Create 50 processes and have each one open 1000
> sockets.
>
> The next thing you have to worry about is whether the OS can handle 50k
> file descriptors open per-system.  Or 50k sockets, or TCP connections.  I
> wouldn't be too surprised if many systems couldn't.  The address space 
> (TCP
> port numbers) is 16-bit (unsigned), or about 65k, but you may well run 
> into
> some other system limit long before you exhaust the theoretically 
> available
> ports.
>
> Something like Scapy, recommended by others, may indeed be able to 
> generate
> all those SYN packets you want, but that doesn't mean you'll get all the
> open connections you seek.  You send a SYN packet to the remote host, and
> it sends back a SYN/ACK.  The local kernel now sees a SYN/ACK packet for a
> port it doesn't know about.  I'm not sure what the RFCs say about that, 
> but
> I wouldn't be surprised if the kernel ends up sending a RST or maybe a FIN
> or something like that.  The kernel owns the ports; it's not nice to try
> and mess with them on your own. 




From castironpi at gmail.com  Sun May 11 00:27:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 21:27:18 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com> 
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com> 
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com> 
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
Message-ID: <e45978fd-7d18-411d-bcaa-145207c6a683@59g2000hsb.googlegroups.com>

On May 10, 10:05?pm, hdante <hda... at gmail.com> wrote:
> On May 10, 8:22?pm, notbob <not... at nothome.com> wrote:
>
> > On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > ? ?So... in short, you'd need to have been reading a tutorial specific
> > > to "shell" scripting...
>
> > I have been. ?I'm also trying to learn bash shell scripting, not to mention
> > sed/awk, php, etc. ?I should have started this a long time ago, but I'm lazy
>
> ?Throw all of this away and learn just python. That will be much
> simpler for you.
>
> > and, like I said, I'm not particularly fond of coding. ?Yes, I have learned
> > basic C and basic , but never beyond intro. ?Now, I'm doing it because I'm a
>
> ?Forget basic and learn python. Later you can learn C.

Fiscally speaking, C and Python may well be just as economical.  So
long as you've spent time learning a computer language, hold you can
get your needs met*.

* Even if money isn't a measure of value, a true measure of value, or
measure of true value.

In light of the actual writing of Python, if you make it, like to.

In sight of competitors, argue that Python is at least a locus, node,
nodepoint, or to-central of something about free and software.

Hold that Python is an end in itself, and/or that writing it is, and/
or is writing an implementation.

(Can you talk about languages like they're people?)

Distinguish further between languages, programs, libraries, and the
standards.

Then evaluate Python for population assortment characteristics, such
as population, overcrowding, undercrowding, and various sense
criteria.

In the Windows world, we are asking, how many keystrokes per thought,
mouse motions per error, and cross.

If your boss sucks but Python rules, it remains unclear that either is
any better.  It is not clear that Python has a will, or computers
have.

If they have minds, whether absent will or not, perhaps it wouldn't
pay to like it too much.  What diversity can you find on a newsgroup?



>
>
>
> > geezer and I figure my brain needs more exercise then just blabbing on
> > usenet. ?Besides, I've been cruising while using linux for too long and have
> > remained low end intermediate. ?Time to get serious. ?Pass the cheat sheets!
>
> > nb- Hide quoted text -
>
> - Show quoted text -



From bruno.desthuilliers at gmail.com  Fri May 23 17:36:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 14:36:37 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>

On 23 mai, 23:14, nayden <nay... at gmail.com> wrote:
> and then I try to restore the object with the following code
>
> def success(rv):
>     print "success"
>     str =  cStringIO.StringIO(libpq.PgUnQuoteBytea(rv[0][0]))
>     i = cPickle.load(str)
>     i.toString()
>
> the execution fails just after the print statement, and I am not quite
> sure why is that.

Please reread the doc for pickle.dump,  pickle.dumps, pickle.load and
pickle.loads.  You just don't need StringIO here, just use the 's
versions of the functions.

> I would love to find out what people are using when they need to do
> something similar
> perhaps I am trying to do it the perl way, while there is an elegant
> python solution.

I don't know if you'd label it 'elegant', but as far as I'm concerned,
storing serialized objects as blobs in a relational database is mostly
non-sense. If I use a relational database, it's because it is a
*relational* database. If you want an OODB, then we have the ZODB,
Durus and a couple others.




From gagsl-py2 at yahoo.com.ar  Thu May 15 22:31:55 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 23:31:55 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
	<1e5bcefd0805151850r899c923m3da14c089973beab@mail.gmail.com>
Message-ID: <op.ua76nhmnx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 22:50:21 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> Hmm.. I re-read your message and I think I'm approaching testing in a
> mechanical way, indeed.
>
> You're right, my test is kind of pointless, given the objective of the
> function, which is to generate a differnt directory name each time it is
> called. I also found it kind of strange to repeat the implementation in  
> the
> test method. However, something keeps telling me that it still has to be
> "unit" tested, sonehow (the algorith used).

Again, that depends on the actual purpose of such function. If all you  
want is a unique directory name, you might consider the set of users and  
time as "hints" only; a completely random directory name would be OK. You  
might not even require that the same input generates always the same  
output. The less restrictions you put on the required behavior, the  
easiest is to replace the current implementation. Of course, if you *do*  
require some invariant or some condition, you have to test for it.

-- 
Gabriel Genellina



From mde at MicahElliott.com  Thu May  1 14:17:47 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Thu, 01 May 2008 11:17:47 -0700
Subject: Best way to store config or preferences in a multi-platform	way.
In-Reply-To: <790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <20080501181747.GA6567@micahelliott.com>

On 2008-05-01 Carl Banks wrote:

> If you don't intend to write a GUI to do that, write a simple
> text file parser (if the options are simple), use ConfigParser,
> or use a Python file that you exec.

INI is great for so many things.  It is also extremely
commonplace, regardless of platform.  The biggest challenge might
be choosing which one to adopt:

    http://wiki.python.org/moin/ConfigParserShootout

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com
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From space.captain.face at gmail.com  Thu May 29 04:23:45 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 01:23:45 -0700 (PDT)
Subject: Finding file details...
Message-ID: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>

I've been trying to figure out how to find the details of files
(specifically music for now) for a little sorting script I'm making,
My aim is to get details on the artist, album, and genre for mp3 and
wma files (possibly more in the future). My closest match was when I
stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
to help (and most of it went over my head). Is there any module I can
use to find this sort of data? I'm trying to not make it specialised
in music, because I may want to extend this to picture, movie, text
etc. files in the future. Any ideas how I could go about this?


From cmpython at gmail.com  Sat May 10 03:58:12 2008
From: cmpython at gmail.com (CM)
Date: Sat, 10 May 2008 00:58:12 -0700 (PDT)
Subject: firefox add-on to grab python code handily?
Message-ID: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>

I encounter a fair number of small Python scripts online, and usually
try them out by copying them to the clipboard, pasting into Notepad,
saving them, and either running them directly or opening them in
IDLE.

And so I was wondering if anyone knew of an extension/add-on/script
for Firefox which would allow a way to do something like this:

user highlights Python code on a webpage
right clicks
selects a menu item, "Save as Python code"
FF pops up a filename dialog or popup for filename
(and, though I don't know if this is possible, runs Python code)

Not an important thing by any means, but it would be a nice
convenience.
I know there are similar add-ons in FF for grabbing highlighted text
and
saving, but they are not good, as they don't seem to preserve line
breaks
properly or append the .py extension, etc.  I've Googled for this and
so far
it seems it doesn't exist.  Anyone know?




From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 04:12:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 10:12:45 +0200
Subject: default object comparison considered harmful?
In-Reply-To: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <482d41eb$0$23030$426a74cc@news.free.fr>

A.T.Hofkamp a ?crit :
> Hello all,
> 
> Yesterday we found the cause of a bug that has caused problems for a long time.
> It appeared to be the following:
> 
> class A(object):
>     pass
> 
> print min(1.0, A())
> 
> which is accepted by Python even though the A() object is not numerical in
> nature.
> 
> The cause of this behavior seems to be the compare operation of the object
> class.
> 
> 
> Is there a way to disable this behavior in Python (other than deriving a new
> 'object-like' class that doesn't do comparisons?)

Other than implementing a custom __cmp__ function ? Not AFAIK. FWIW, you 
don't necessarily need to fiddle with inheritance - you can also 
monkeypatch your classes (nb : for new-style objects, you cannot 
monkeypatch __magic__ methods on a per-object basis).

Also, IIRC, this behaviour has changed in Python 3.



From aaron.watters at gmail.com  Fri May  2 16:05:43 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Fri, 2 May 2008 13:05:43 -0700 (PDT)
Subject: Why is None <= 0
References: <fut7q3$kup$1@newsreader2.utanet.at>
	<481226f9$0$20866$9b622d9e@news.freenet.de> 
	<slrng14t4k.vg2.jon+usenet@snowy.squish.net>
Message-ID: <769285d3-d774-4690-9062-d03c8fb1a93f@24g2000hsh.googlegroups.com>

On Apr 25, 8:17 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> On 2008-04-25, Martin v. L?wis <mar... at v.loewis.de> wrote:
>
> > None is smaller than anything.
>
> According to Tim Peters, this is not true.
>
> See http://bugs.python.org/issue1673405

This is unfortunate.  I would advocate
something like ordering "incomparable objects"
by the name of their type or something
similar.

When building indexing structures it can be
very nice to be able to construct a list of
heterogeneous tuples and sort them without getting
an exception.  Implementing this using L.sort(cmp) where
cmp is implemented in Python can result in
a significant speed penalty.

What's up with Tim Peters anyway?  I haven't
seen much from him for a while.
   -- Aaron Watters

===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=quote+tim+peters


From gandalf at shopzeus.com  Wed May 21 10:35:11 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 16:35:11 +0200
Subject: problem with import / namespace
In-Reply-To: <483427BF.6030805@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
Message-ID: <4834331F.2000606@shopzeus.com>


>
> When you try to import a module, python starts to search for it. The 
> was it does the search is very well defined. It mostly depends on the 
> current directory and sys.path. You can read more about this here:
"The was it" -> "The way it"
> - inside your app.py file either make sure that the current dir is 
> /app, or insert /app in the first place in sys.path
Example:

import os,sys
mydir = os.split(os.abspath(__file__)[0]
os.chdir(mydir) # Option 1 - chdir to dir. containing your app
sys.path.insert(0,mydir) # Option 2 - add to your sys.path

Good things to know:

- In Python, it is recommended not to use upper case module/package 
names. It is a convention. However, some 3rd party packages (like 
wxPython or PIL) break this rule.
- Obviously, you should not use numbers, reserved words for module or 
package names. The name should tell what is it for.
- It is good to know the standard library, and avoid overwriting names 
from the standard lib. For example, you can create your own 'os.py' 
module but it would be very silly.

I personally tend to use absolute package names for libraries that are 
not tied to a specific project but it does not need to be that way.

You can find many threads in python-list about how applications and 
packages should be constructed.

Best,

   Laszlo



From aahz at pythoncraft.com  Fri May 30 16:00:32 2008
From: aahz at pythoncraft.com (Aahz)
Date: 30 May 2008 13:00:32 -0700
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <g1pmd0$o9k$1@panix3.panix.com>

In article <b9201cbc-5e24-480f-ba55-44227b622c6d at c19g2000prf.googlegroups.com>,
 <allendowney at gmail.com> wrote:
>
>Anyway, I am posting to ask about the current status of new style
>classes.  I am planning to present only one style in the book, because
>the differences between them don't matter for anything I am doing in
>the book.

You've got a tough use-case.  When is your book supposed to be done?  To
what extent to you want to make your book work with 3.x?

Overall, I'm generally in favor of presenting both (I'm opposed to
new-style-only), but in your case it sounds like just new-style would be
better.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From terry.yinzhe at gmail.com  Fri May 16 19:44:00 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Fri, 16 May 2008 16:44:00 -0700 (PDT)
Subject: Get all the instances of one class
Message-ID: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>

Hi,

Is there a simple way to get all the instances of one class? I mean
without any additional change to the class.

br, Terry


From maxm at mxm.dk  Tue May 27 13:24:11 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 27 May 2008 19:24:11 +0200
Subject: New chairman
In-Reply-To: <a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <g1hg3r$orp$1@ger.gmane.org>

Sverker Nilsson skrev:
> I was talking about Guido van Rossum
> 
> The one who decides, so far when people agree

I have been using Python since the nineties. I cannot remember when I 
have had to rewrite old code because of changes in the language.

At the same time I have been feeling as if I was sitting in a time 
machine watching other languages whoosh by at breakneck speed.

Entire technologies have been developed to make programming as practical 
and easy as it has been in Python the entire time.

So I find it hard to see exactly what it is that Guido is doing wrong?

-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From eckhardt at satorlaser.com  Wed May 21 06:14:22 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Wed, 21 May 2008 12:14:22 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <099dg5-r6j.ln1@satorlaser.homedns.org>

boblatest at googlemail.com wrote:
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
> 
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly.

How about this (untested) code:

for re in (re1, re2, re3):
  match = re.match(line)
  if match:
    # use it

This requires that "use it" means the same for each regular expression
though...

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From krumblebunk at gmail.com  Tue May  6 11:29:59 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 08:29:59 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<fvptae$2ve$1@gemini.csx.cam.ac.uk>
Message-ID: <c7174f30-9ca4-48e6-a231-39503b67ead8@f24g2000prh.googlegroups.com>

Thanks all!!

kb.



From kirk at daycos.com  Fri May 30 14:53:55 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 13:53:55 -0500
Subject: Calling instance methods from a decorator
References: <87d4n3n1z7.fsf@internal.daycos.com>
	<6aasg8F35t0j9U1@mid.uni-berlin.de>
Message-ID: <871w3jmxmk.fsf@internal.daycos.com>

At 2008-05-30T17:40:17Z, "Diez B. Roggisch" <deets at nospam.web.de> writes:

> Of course you can get the self - just use the first paramter, because it
> *is* self. Self is just a parameter - nothing special.

If I blame it on being a long week, can I keep my geek card?
-- 
Kirk Strauser
The Day Companies


From mccredie at gmail.com  Thu May  1 14:52:48 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 1 May 2008 11:52:48 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <006ba21e-8510-4dd1-992c-3da3f7997bec@v26g2000prm.googlegroups.com>

On May 1, 4:37 am, Lance Gamet <la... at gamet.com> wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but
> I have a small amount of user specific data that I need to be stored like
> configuration or preferences for example, the list of databases that the
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry,
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability
> for the user to edit the file independently of the program is a good or
> bad thing.
>
> Thanks a lot.
> Lance

sqlite is a wonderful option, if the user doesn't need to directly
edit it.

Alternatively, you might consider just using python code. Something
like this:

[config_file.py]
class Config:
   optiona = 1
   optionb = 2
[/end file]

Then, in your code you can just:

>>> import imp
>>> m = imp.load_source("config_file", "./config_file.py") # use appropriate path (of course)
>>> m.Config.optiona
1
>>> m.Config.optionb
2

Like any other solution, this option has advantages and disadvantages,
but I think it is worth exploring. The class method in the above code
is just an example, choose whatever format is appropriate.

As for generating the contents of the file, tripple quoted strings and
`%r` are your friends.

Matt



From torriem at chem.byu.edu  Thu May  1 12:51:58 2008
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Thu, 01 May 2008 10:51:58 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <4819F4A5.4010302@gmail.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
	<4819F4A5.4010302@gmail.com>
Message-ID: <4819F52E.8080100@chem.byu.edu>

Michael Torrie wrote:
> The second example, x = Integer.fromString('5') demonstrates a huge
> weakness in Java.  

Ahem.  Javascript.  Sorry.

-- 
Michael Torrie
Assistant CSR, System Administrator
Chemistry and Biochemistry Department
Brigham Young University
Provo, UT 84602
+1.801.422.5771

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?



From gherron at islandtraining.com  Fri May 16 17:33:28 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 14:33:28 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
References: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
Message-ID: <482DFDA8.3040305@islandtraining.com>

Dan Upton wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time.  If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated.  For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated).  Roughly:
>
> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
>
> The problem:
>
> RuntimeError: dictionary changed size during iteration
>
> So, the question is: is there a way around this?  

Yes.  Create a list of keys, and loop through it:
pids = procs_dict.keys()
for pid in pids:
    if  procs_dict[pid].poll() != None
     # do the counter updates
     del procs_dict[pid]

Then the diction delete operation won't trip up the loop and its 
internal counter.



OR:  Create a list of things to delete while you are in the loop, and do 
the delete afterwards

deleteme = []
for pid in procs_dict:
  if procs_dict[pid].poll() != None
     # do the counter updates
     deleteme.append(pid)

for pid in deleteme:
   del procs_dict[pid]



OR: shred and rebuild the dictionary each time:

new_dict = {}
for pid,value in procs_dict.items():
   if value.poll() != None:
     # do the counter updates
      pass
    else:
      new_dict[pid] = value

procs_dict = new_dict



Gary Herron

  
> I know that I can
> just /not/ delete from the dictionary and keep polling each time
> around, but that seems sloppy and like it could keep lots of memory
> around that I don't need, since presumably the dictionary holding a
> reference to the Popen object means the garbage collector could never
> reclaim it.  Is the only reasonable solution to do something like
> append all of those pids to a list, and then after I've iterated over
> the dictionary, iterate over the list of pids to delete?
>
> (Also, from the implementation side, is there a reason the dictionary
> iterator can't deal with that?  If I was deleting from in front of the
> iterator, maybe, but since I'm deleting from behind it...)
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gagsl-py2 at yahoo.com.ar  Thu May  8 09:28:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 10:28:13 -0300
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
References: <fvut8a$b67$1@theodyn.ncf.ca>
Message-ID: <op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:

> The readme.txt has:
>
> All you need to do is open the workspace
> "pcbuild.sln" in Visual Studio,
> select the desired combination of
> configuration and platform and eventually
> build the solution. Unless you are going
> to debug a problem in the core or
> you are going to create an optimized
> build you want to select "Release" as
> configuration.
>
> Unfortunately, the Express Edition
> (Free) doesn't handle "solution" files.

Yes, it does. You get a warning saying that solution *folders* aren't supported; that just means that you won't see those 26 projects nicely grouped, only as a long list, that's all... Python builds fine with Visual C++ Express Edition.
Select Release, Win32 from the dropdown lists, press F7, and wait for compilation to complete...

-- 
Gabriel Genellina



From mal at egenix.com  Tue May 13 06:52:32 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 13 May 2008 12:52:32 +0200
Subject: Is there no single/uniform RDBMS access API module for Python
 ?
In-Reply-To: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
Message-ID: <482972F0.2090101@egenix.com>

On 2008-05-12 07:43, Banibrata Dutta wrote:
> Hi,
> 
> Again a noob question.
> 
> Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
> correct to conclude that there is no RDBMS agnostic, single/uniform DB
> access API for Python ?
> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> 
> How is the RDBMS change handled for solutions which need to work with
> different RDBMSs ??

Most Python database modules adhere to the Python Database API specification
(DB-API). The current version 2 is available in the PEP format as:

     http://www.python.org/dev/peps/pep-0249/

The spec was created and is maintained by the Python DB-SIG:

     http://www.python.org/community/sigs/

If you are looking for a generic Python database interface, then I'd
suggest you have a look at our mxODBC:

     http://www.egenix.com/products/python/mxODBC/

It works on all common Python platforms (e.g. Windows, Linux x86/x64,
Macs, Solaris, etc.) and provides the same API on these, so apart from
changing the ODBC driver configuration, you don't need to make any
major changes to your application if you want to switch from one
platform to another.

Note: mxODBC is a commercial add-on to our eGenix mx Base OSS
distribution. It's maintained by eGenix and has been around
since 1997.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 13 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From russblau at hotmail.com  Thu May 22 17:52:02 2008
From: russblau at hotmail.com (Russell Blau)
Date: Thu, 22 May 2008 17:52:02 -0400
Subject: How do I make a copy of my class object?
References: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>
Message-ID: <g14pu5$phf$1@ger.gmane.org>

"Marlin Rowley" <marlin_rowley at hotmail.com> wrote in message 
news:BAY135-W134E8CAB38A2ACB2F5933F9FC60 at phx.gbl...
> I have a class object which has the usual data members and functions.
> I'm trying to make a copy of this class (which includes wx.Bitmap objects)
> but deepcopy() doesn't seem to work.  How would I do this?

Are you trying to make a copy of the "class object" or of a class instance?

What error message are you getting when you call deepcopy() on this object?






From bronger at physik.rwth-aachen.de  Thu May  1 19:21:38 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 01:21:38 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru>
Message-ID: <874p9hvce5.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> [...]
>
> For me it looks more like an old-school/new-school thing than
> use-case thing. I may be wrong, but I see more and more new
> projects use things like reST and YAML/JSON and it feels like they
> are gradually replacing traditional old-school solutions.
>
> And I've got very strong impression that YAML is a the future of
> configuration files when Google released their App Engine.

In contrast to many other areas of software, configuration files
needn't be compatible with anything except the user's brain.  So
even if the rest of the world uses config format X, you can safely
stick with config format Y.

I mean, YAML is not really a complex thing, yet it was conceived not
before 2001.  The reason is that traditional config files do a good
job.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From sven.siegmund at gmail.com  Sun May 11 18:27:51 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:27:51 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
Message-ID: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>

Hello,

I am testing Python 3.0a5's handling of unicode strings. Since SPE is
not yet for Python 3.0, I have begun to write in IDLE 3.0a5.

I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
can:

#!/usr/bin/python
# -*- coding: utf-8 -*-

def na?tiSlovn?k(zdroj='slovn?k.txt'):
    soubor = open(zdroj, mode='r', encoding='utf_8')
    ??dky = soubor.readlines()
    for ??dek in ??dky:
        print(??dek, end='')

na?tiSlovn?k()
# End of source code

I have set up Default Source Encoding to UTF-8 in IDLE's general
configuration. Still, when I open that source code and try to run it,
IDLE complains about "invalid character in identifier" and highlights
"zdroj" red in the first line (sic!).

However, when I run the source code from command line (by "python
<filename>"), it gets executed well and does what it shall do.

I should probably add, that I have installed py3k:62932M, May 9 2008,
16:23:11 [MSC v.1500 32 bit (Intel)] on win32. I use Windows XP SP 3.

Is this a known bug if IDLE 3.0a5 which will be fixed in the final
release?

Greetings,

S.


From victorsubervi at gmail.com  Thu May  8 11:33:55 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 8 May 2008 10:33:55 -0500
Subject: Custom Classes?
In-Reply-To: <4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
Message-ID: <4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>

Okay, trying this again with everything working and no ValueError or any
other errors, here we go:

Load this code. Unless you use a similar login() script, you will want to
edit your own values into the user, passwd, db and host:

#!/usr/bin/python

import MySQLdb

import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()

pic = "pic1"
w = 20
x = 0
d = 6
y = 1

getpic = "getpic" + str(w) + ".py"
try:
  os.remove(getpic)
except:
  pass
code = """
#!/usr/local/bin/python
import cgitb; cgitb.enable()
import MySQLdb
import cgi
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()
form = cgi.FieldStorage()
picid = int(form["id"].value)
x = int(form["x"].value)
pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
pic = pics[x]
db = MySQLdb.connect(host, user, passwd, db)
cursor= db.cursor()
sql = "select %s from products where id='%s';" % (pic, str(picid))

cursor.execute(sql)
content = cursor.fetchall()[0][0].tostring()
cursor.close()
print 'Content-Type: image/jpeg'
print
print content
"""
script = open(getpic, "w")
script.write(code)
script.close()



and then surf to:
http://whatever.url/getpic20.py?id=6&x=1


Also, please re-send the link on how to post good questions to the list. I
cannot find it.
TIA,
Victor
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From jpthing at online.no  Thu May  8 04:05:36 2008
From: jpthing at online.no (John Thingstad)
Date: Thu, 08 May 2008 10:05:36 +0200
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<e04ba51f-30a0-44fa-aade-c2fb6c99f944@26g2000hsk.googlegroups.com>
Message-ID: <op.uatsrmq2ut4oq5@pandora.alfanett.no>

P? Thu, 08 May 2008 04:14:35 +0200, skrev Kyle McGivney  
<KyleMcG at gmail.com>:

>> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
>> lisp's keywords ?let?, is based on the English word ?let?. That word
>> is one of the English word with multitudes of meanings. If you look up
>> its definition in a dictionary, you'll see that it means many
>> disparate things. One of them, as in ?let's go?, has the meaning of
>> ?permit; to cause to; allow?. This meaning is rather vague from a
>> mathematical sense. Mathematica's choice of Module, Block, is based on
>> the idea that it builds a self-contained segment of code. (however,
>> the choice of Block as keyword here isn't perfect, since the word also
>> has meanings like ?obstruct; jam?)
>
> If the purpose of let is to introduce one or more variable bindings,
> then I don't see how changing to block or module would improve
> anything. I've always found it fairly intuitive to parse (let ((x
> 5)) ...) to "let x be five". Additionally, replacing let with the
> synonyms you provided would approximately yield "permit x to be five"
> or "allow x to be five". In my mind you have constructed an argument
> in favor of let here (obviously it's better than block, because
> nobody's going to come along and be confused about whether let will
> "obstruct" or "jam" them :)

How about bind?
  (bind ((v f (mod i)) ((a b) list) (t (rem q)))

1. is a multiple-value-bind
2. is a destructuring-bind
3. is a let

http://common-lisp.net/project/metabang-bind/

To me this is a example of where the ANSI group could have spent more time  
on naming.

--------------
John Thingstad


From deets at nospam.web.de  Sun May  4 12:38:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 18:38:42 +0200
Subject: Weird import problem
In-Reply-To: <fvkoer$2g7h$1@gwdu112.gwdg.de>
References: <fvkoer$2g7h$1@gwdu112.gwdg.de>
Message-ID: <68674mF2rjrt5U1@mid.uni-berlin.de>

Anton81 schrieb:
> I have a directory structure like
> 
> NS/dir1/file1.py
> NS/dir2/file2.py


This *must* be wrong or at least not the full directory listing - please 
read

http://docs.python.org/tut/node8.html

> if in the python shell I type
> 
> import NS.dir1.file1
> 
> it works, however typing
> 
> import NS.dir2.file2
> 
> fails with
> 
> ImportError: No module named dir2.file2
> 
> Any ideas what could go wrong?
> Directory permissions seem to be OK.

Missing __init__.py in the dir2?

Diez


From tarun.kap at gmail.com  Fri May  2 14:25:13 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 11:25:13 -0700 (PDT)
Subject: list.index crashes when the element is not found
Message-ID: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>

WHAT ?

This is crazy


From castironpi at gmail.com  Tue May 20 17:19:12 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 14:19:12 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1> 
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com> 
	<a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>
Message-ID: <111a4113-d453-4c2c-9997-0c27d8fcea8b@a32g2000prf.googlegroups.com>

On May 20, 11:49?am, s0s... at gmail.com wrote:
> On May 20, 9:04 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 20, 5:04 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> > > John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > > >>>> a = 'this is longer'
> > > >>>> b = 'this is longer'
> > > >>>> a == b
> > > > True
> > > >>>> a is b
> > > > False
>
> > > > In the above example, Python has created only one string called
> > > > 'hello' and both x and y reference it. However, 'this is longer' is
> > > > two completely different objects.
>
> > > That is true when run interactively, but the behaviour changes again if you
> > > run it as a script:
>
> > > C:\Temp>type t.py
> > > a = 'this is longer'
> > > b = 'this is longer'
> > > print a is b
>
> > > C:\Temp>t
> > > True
>
> > > In short, two equal strings may or may not be identical and any code which
> > > makes assumptions based on observed behaviour is broken. If you want to be
> > > able to test identity on strings safely then use the 'intern()' builtin to
> > > get repeatable behaviour.
>
> > > --
> > > Duncan Boothhttp://kupuguy.blogspot.com
>
> > There is no such thing as real true equals.
>
> That's quite some dark deep philosophy. Fortunately, computers are not
> as complicated as real life. I would argue that, programatically,
> there *is* such thing as "real true equals". I would also argue that
> that view is most certainly not shared by everyone.- Hide quoted text -
>
> - Show quoted text -

Mean as it sounds, bits are pigeonholes: 5+V or 0.  As such, computers
are able to simulate numerical identity, but, don't forget, all your
inputs are discretized (pigeonholed).

Symbolic (mathematical) identity (equality) is defined as a reflexive,
symmetric, transitive relation, and partitions its domain into
equivalence classes (membership in which is binary).  Symbols are
outside of cause.

Ma: Symbolic identity is a mathematical relation
Mb: Symbols are acausal
m: Matter is causal
C: Symbolic identity is not defined on matter.

Further, conclude computers are symbolic only.  Now, what can a hoard
of people do with some symbols?

But, I defer on the practical sense.


From amit.uttam at gmail.com  Fri May 16 20:12:10 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:12:10 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
	<LnoXj.10564$Xv3.10250@bignews4.bellsouth.net>
Message-ID: <c5f3f298-5aba-426b-a9fe-cb0274fe307c@1g2000prg.googlegroups.com>

On May 16, 4:02 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> amit.ut... at gmail.com wrote:
> > Hey there,
>
> > I have a simple question about python print statement. Take the
> > following code snippet for example...
>
> > 1 print "-#- executing: %s" % section,
> > 2 tests[section] = test.testcase(name=config.get(section,'name'))
> > 3 tests[section].runTest()
> > 4 printStatus(tests[section])
>
> > Now the problem is that line 1 does not get printed until line 4. What
> > I thought would happen is that line 1 gets executed and the user sees
> > that the statement that the test case is executing. Then after the
> > test case executes a "PASS" or "FAIL" appears on the same line as the
> > "-#- executing: 0053" statement.
>
> > e.g.
> > -#- executing: 0053     FAIL
>
> > Some tests take a long time to finish thus the screen is blank until
> > the entire test finishes and the above statement is outputted.
>
> > Thanks for any help.
>
> 'print' sends its output to sys.stdout, which is buffered, and may not be
> displayed immediately (because it's held in the buffer).  To force the output to
> be displayed, use flush():
>
>    print "-#- executing: %s" % section,
>    sys.stdout.flush()
>    ...tests here...
>
> Hope this helps!
>
> --Hans

Thanks a lot!

This worked beautifully!


From python at bdurham.com  Wed May 21 10:32:08 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 21 May 2008 10:32:08 -0400
Subject: Publish a program
In-Reply-To: <48342434_2@news.tm.net.my>
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
Message-ID: <1211380328.14783.1254358753@webmail.messagingengine.com>

> appreciate somebody to join and put new views on this project

Send us a link to one of the sites with your code, eg.
http://python.pastebin.com

Malcolm


From castironpi at gmail.com  Fri May 16 18:36:47 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:36:47 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com> 
	<e7b9fdb8-5b15-49aa-a6ea-b27a3ee550a2@27g2000hsf.googlegroups.com>
Message-ID: <d21c1d04-bdc3-47cb-a224-d67adf38dc8e@l64g2000hse.googlegroups.com>

On May 16, 5:19?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:29?pm, "bruno.desthuilli... at gmail.com"
>
>
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
>
> > > On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > > > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > > > i extract info from one file and put it into a dictionary.
> > > > > i want to save that dictionary for later use, how do i do that?
> > > > > might save a list of dictionaries or a list of classobjects too if
> > > > > there is any difference.
>
> > > > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > > > ...
> > > > Jay Graves
>
> > > pickle.dumps(mg)
> > > pickle.load(mg)
>
> > > 'dict' object has no attribute 'readline'
> > > dumps load(well i dont know but i get no complaint but running load
> > > generates that error)
>
> > What about *READING THAT FUCKING MANUAL* ?
>
> >http://docs.python.org/lib/node316.html
> > """
> > dump(obj, file[, protocol])
> > ? ? Write a pickled representation of obj to the open file object
> > file. This is equivalent to Pickler(file, protocol).dump(obj).
>
> > ? ? If the protocol parameter is omitted, protocol 0 is used. If
> > protocol is specified as a negative value or HIGHEST_PROTOCOL, the
> > highest protocol version will be used.
>
> > ? ? Changed in version 2.3: Introduced the protocol parameter.
>
> > ? ? file must have a write() method that accepts a single string
> > argument. It can thus be a file object opened for writing, a StringIO
> > object, or any other custom object that meets this interface.
>
> > load(file)
> > ? ? Read a string from the open file object file and interpret it as a
> > pickle data stream, reconstructing and returning the original object
> > hierarchy. This is equivalent to Unpickler(file).load().
>
> > ? ? file must have two methods, a read() method that takes an integer
> > argument, and a readline() method that requires no arguments. Both
> > methods should return a string. Thus file can be a file object opened
> > for reading, a StringIO object, or any other custom object that meets
> > this interface.
>
> > ? ? This function automatically determines whether the data stream was
> > written in binary mode or not.
> > """
>
> > Example use:
>
> > >>> d = dict(a=1, b=2)
> > >>> f = open("mydict.dat", "w")
> > >>> pickle.dump(d, f)
> > >>> f.close()
> > >>> f = open("mydict.dat")
> > >>> d2 = pickle.load(f)
> > >>> f.close()
> > >>> d2 == d
> > True
> > >>> d2
> > {'a': 1, 'b': 2}
>
> > Now : it's not the first time - in a couple days - that you ask a
> > question that you wouldn't have asked if you had taken a couple
> > minutes doing the tutorial and/or reading the doc. This newsgroup is
> > *very* tolerant (in most other places on usenet, you would have get a
> > raw RTFM on the first question, and a PLONK on the second), but there
> > are still limits, and as far as I'm concerned you're not far from
> > them. So do yourself and the world a favour, read this:http://catb.org/~esr/faqs/smart-questions.html
>
> > and then this:http://docs.python.org/tut/tut.html
>
> > and next time someone points you to a specific module, have mercy and
> > *read* the doc before posting.
>
> > As far as I'm concerned, I won't anwser any of your questions unless
> > it's obvious that you have followed these advices (but then I'll be
> > happy to help if I can).- Hide quoted text -
>
> > - Show quoted text -
>
> There is 'shelve'. ?It's just that you have to re-update each entry
> when you modify, so it's just similarity you'd be saving.- Hide quoted text -
>
> - Show quoted text -

Now a shelf of filenames could be valuable.


From n00m at narod.ru  Mon May  5 10:58:26 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 07:58:26 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
	<fvmov5$o4i$00$1@news.t-online.com>
	<95445d33-218f-42de-9412-067229c20830@d45g2000hsc.googlegroups.com>
Message-ID: <8f56fd78-05fa-481a-982e-feb03d66a52e@c65g2000hsa.googlegroups.com>

it can be done like this:

            osql=popen2.popen2('osql -E -S(local) -dpubs -c"GO" -n -
w800')
            osql[1].write(query+'\nGO\n')
            osql[1].close()
            res=osql[0].readlines()
            osql[0].close()
            res=join(res,'')

btw, is it necessarily to close() osql[1] in order to get res?
without close() the script seems is waiting for smth.
I'd like to get "res" in a loop:
write()
read()
write()
read()
...
is it possible?


From pataphor at gmail.com  Tue May 20 09:48:02 2008
From: pataphor at gmail.com (pataphor)
Date: Tue, 20 May 2008 15:48:02 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
Message-ID: <20080520154802.4b5df647@hyperspace>

On Tue, 20 May 2008 06:12:01 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> Well, ok. Like I said, I never _took_ the position that it _should_
> be a list of lists, I just said I didn't see the advantage to using
> a single list.

I'm now thinking about a list of lists containing single element lists.

def test():
    n = 3
    R = range(n)
    M = [[[i+j*n] for i in R] for j in R]
    for L in M:
        print L
    row2 = M[1]
    print
    print row2
    col3 = [L[2] for L in M]
    print col3
    col3[1][0]=9

print col3
    print row2
    print
    for L in M:
        print L
        
if __name__=='__main__':
        test()

The idea is to use a single element list as kind of storage facility.
That enables me to copy a column, then change something in that column
and make the change turn up in the matrix and even in a previously made
copy of a row that shared the specific element.
 
> Today's little joke: Long ago I would have solved
> this by storing the data as a list of rows and _also_
> a list of columns, updating each one any time the
> other changed. Just goes to show you things
> could always be worse...

Well have I ever ... I only thought about this last week and I
actually thought it was a *good* idea.  I only gave up on it because
now I would have to keep  track of how far the two views are out of
sync, because some operation could use data that was modified by an
other view. Zipstar transposition is very handy for syncing, but it is
also very expensive. But probably not for you.

> Expressing interest is a big mistake...

How so? ;-)
 
> Sometime soon a thread will appear titled something
> like "indexed attributes" with a stripped-down but
> functional example of what I have in mind for Matrix

I can't wait! Keep up the good work.

P.



From rustompmody at gmail.com  Mon May 19 06:52:25 2008
From: rustompmody at gmail.com (Rustom Mody)
Date: Mon, 19 May 2008 16:22:25 +0530
Subject: pickle internals
Message-ID: <f46c52560805190352ycb62d5dtdad84d55da81bf9d@mail.gmail.com>

I am trying to understand pickle internals.
This involves:
-- the algorithm(s) used for traversal arbitrary structures
-- the pickle format
-- the use if any of introspection

I'll be thankful for any pointers

PS Should this question be put on some other list?/
-------------- next part --------------
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From deets at nospam.web.de  Tue May  6 05:10:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 11:10:34 +0200
Subject: read line
References: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
Message-ID: <68all5F2sj3e0U1@mid.uni-berlin.de>

moustafa.elmihy at gmail.com wrote:

> hi every body,
> 
> I'm a new python user and I'm making a program to run useing Abaqus
> and there is something I can't do,
> 
> if i have a text file that has a line like this " 10   20  30     40
> 50" and I wana do the coding to put every number of these like 10 or
> 20 in a separate variable .. any suggestions ??

Look up on the file-objects in the documentation, as well as string-methods
such as split and the int-function.

Diez


From n00m at narod.ru  Mon May  5 05:25:15 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 02:25:15 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
Message-ID: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>

os:windows
ml = 'line1 \n line2 \n line3 \n'
exec('some.exe "' + ml + '"')

and some.exe get only 'line1'...


From pydecker at gmail.com  Mon May 12 10:40:26 2008
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 12 May 2008 09:40:26 -0500
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <ca55a9900805120740k1532e5aep968638c3e3d8b3a5@mail.gmail.com>

On Mon, May 12, 2008 at 1:45 AM, Banibrata Dutta
<banibrata.dutta at gmail.com> wrote:

> > >  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is
> it correct to conclude that there is no RDBMS agnostic, single/uniform DB
> access API for Python ?
> > > Something in the lines of JDBC for Java, DBD for Perl etc. ?
> > >  How is the RDBMS change handled for solutions which need to work with
> different RDBMSs ??
> > >
> >
> > http://www.python.org/dev/peps/pep-0249/
> >
>
> That appears to be only an API specification. Are there any implementations
> of that ?

You might want to take a look at Dabo (http://dabodev.com). They have
a backend-agnostic interface for working with different databases. I
don't do database apps myself, so I can't comment on how well it
works, but based on the comments of others on the Dabo email lists, it
seems as though it works well enough.

-- 

# p.d.


From joe.p.cool at googlemail.com  Thu May  8 17:10:57 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Thu, 8 May 2008 14:10:57 -0700 (PDT)
Subject: Python GUIs and custom controls
Message-ID: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>

So far I have a little experience with Tkinter and wxPython. I wonder
which of the numerous Python GUI kits would be the best choice for a
multi platform application that makes heavy use of custom controls, 3D
views and the like? Thanks in advance for your hints and advice.

Joe


From gabriel.rossetti at arimaz.com  Mon May 26 06:14:55 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 12:14:55 +0200
Subject: b64encode and unicode problem
Message-ID: <483A8D9F.3080104@arimaz.com>

Hello everyone,

I am trying to encode a string using b4encode and I get the following 
error :

 >>> b64encode(u"Salut Pierre, comment ?a va?")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
    encoded = binascii.b2a_base64(s)[:-1]
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
position 22: ordinal not in range(128)

If I remove the "u" infront of the string, it works. The problem is that 
I in my program, the string is given to me un unicode/utf-8. I tried 
several things, but I still get it, How can I get it to work, anybody 
have any idea?

Thanks,
Gabriel


From http  Sun May 25 19:35:23 2008
From: http (Paul Rubin)
Date: 25 May 2008 16:35:23 -0700
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <7xskw69cuc.fsf@ruckus.brouhaha.com>

miller.paul.w at gmail.com writes:
> Is there any place outside the actual C source for Python that has
> information about the performance of Python's built-in operations?

Really, just the source code and the general culture.  It's not in the
docs; that would be a pretty rare thing.

> For example, I'd *expect* list.append to be O(1), and I hope that
> list[i] is O(1), but I don't really know that for sure, since it
> would depend a lot on the internal implementation.

list[i] is O(1).  list.append is amortized O(1) but on some calls can
take much longer.  Basically list.append preallocates some extra space
for further appends but when you use up the extra space there is some
copying.  

> I'm really only asking this for curiosity's sake --- more as a
> reasonable, non-trollish version of the "Python is slow" post than
> anything. :-)  I've never really had any problems with the performance
> of Python code that I couldn't solve by either changing my algorithm
> or, if all else has truly failed, rewriting in C or Pyrex.

"You can fix your Python program's performance problems by rewriting
it in C" is not that convincing an answer to a concern that Python is
slow ;-).


From __peter__ at web.de  Mon May  5 06:53:26 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 05 May 2008 12:53:26 +0200
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <fvmov5$o4i$00$1@news.t-online.com>

n00m wrote:

> os:windows
> ml = 'line1 \n line2 \n line3 \n'
> exec('some.exe "' + ml + '"')
> 
> and some.exe get only 'line1'...

My crystall ball says you want

subprocess.call(["some.exe", ml])

exec is a python statement that executes python code.

Peter


From castironpi at gmail.com  Tue May 13 10:23:01 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:23:01 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<6c34f3a3-88fa-4519-b624-34a4589d2424@c65g2000hsa.googlegroups.com>
Message-ID: <3b6ac749-be8a-4d7d-91eb-d357554c6a24@b1g2000hsg.googlegroups.com>

On May 13, 9:01?am, castiro... at gmail.com wrote:
> On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
>
>
> > Any programming that helps you solve a problem is fun and
> > recreational. At least, that's how I look at it. I suppose it really
> > depends on why you're doing it, what your objective is, etc. But I'd
> > say, why not?
>
> > Tron! That's one I haven't seen in awhile. I'll have to take a mental
> > note to rent the movie again someday. I always thought a game based on
> > the movie hackers would be cool. Actually not based on the movie
> > itself, but on that 3D computer world they kept breaking into. Ah man,
> > it's so funny looking back on that film. Gibson, that's what they
> > called it. It was like a 3D database. That in itself wouldn't make a
> > very good game, but I suppose one could easily be created around that
> > idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> > trapped in this 80's looking 3D world that has access to all the
> > world's information. More stuff could be thrown in to make it more
> > interesting. And of course, there would have to be hidden references
> > or parodies to whatever movies inspired it.
>
> > Good luck with your project
>
> > Sincerely,
> > Joshua
>
> > On May 13, 9:02?am, castiro... at gmail.com wrote:
>
> > > Hi all.
>
> > > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > > Now to repeat the subject line. ?I'm stuck in Python.
>
> > > Now that was fun. ?I will also try to enumerate simple screen savers
> > > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > > "overunity", such that one person can't be at liberty to live, which
> > > in some technical political arenas would be an "anarchy", but there
> > > are sufficiently many of those that I will too.
>
> > > Does anyone want such a list, or if not, is it at least fun and
> > > recreational to make it? ?The dollar would come along the lines of
> > > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > > and peaceable. ?(As the above would show, you would be free to
> > > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > > Guido getting his fair share? ?I am prepared to share with him.)
> > > Check in his name.
>
> > > I want to try to ally with other programmers and make cool games, like
> > > Tron, that one party can make games for on a console, such as live
> > > obstacles, incl. tear-down, and certain people have to play from time
> > > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > > of time. ?Very summer.
>
> > > Resemblances would include Dungeons & Dragons with multi-host, or
> > > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > > attractive (duh). ?As for voice, it's not clear it's the most
> > > entertaining, but I just don't have a mic.
>
> > > However, forseeing, I return with sailing, but that's in 3-space and
> > > not even in code, as though we'd construct the Royal Navy and battle.
> > > But I think we can keep it well.
>
> > > Thing is, someone has to play it to keep a synch (keep from falling),
> > > and tap-outs would have to live.
>
> > > Side note: In political theory, this is known as the problem of
> > > nominating a successor. ?Would it stay afloat, even for long enough to
> > > make it worth the negatives, yes which do include tear-down and fall,
> > > invasion of privacy, and rights infrigement?
>
> > > I code in Python (get the callbacks), but configurable servers could
> > > spread the work out, using relays to put each person on each's own
> > > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > > c-l-py is the appropriate place to start such a thing, both and ask if
> > > it's been done before.- Hide quoted text -
>
> > - Show quoted text -
>
> My bot just tries to take control and lead. ?(The bot that I'm
> writing!) ?However, it is amusingly unsuccessful. ?We see in lines, so
> the game would be pretty primitive, but I'm not sure that everything
> else isn't merely too exciting, such that Tron wouldn't be monkey-in-
> the-middle, or king of the hill, of fun. ?I'm just not on a hill, so
> someone else would have to try to play it with me online!- Hide quoted text -
>
> - Show quoted text -

But, since, I'm just Tron, I will try short and repeated attempts to
sophisticate, at quantifiable levels, as I would be more than one.


From dullrich at sprynet.com  Tue May 20 11:40:17 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 10:40:17 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
Message-ID: <dullrich-C762B6.10401720052008@text.giganews.com>

In article <20080520154802.4b5df647 at hyperspace>,
 pataphor <pataphor at gmail.com> wrote:

> On Tue, 20 May 2008 06:12:01 -0500
> David C. Ullrich <dullrich at sprynet.com> wrote:
> 
> > Well, ok. Like I said, I never _took_ the position that it _should_
> > be a list of lists, I just said I didn't see the advantage to using
> > a single list.
> 
> I'm now thinking about a list of lists containing single element lists.
> 
> def test():
>     n = 3
>     R = range(n)
>     M = [[[i+j*n] for i in R] for j in R]
>     for L in M:
>         print L
>     row2 = M[1]
>     print
>     print row2
>     col3 = [L[2] for L in M]
>     print col3
>     col3[1][0]=9
> 
> print col3
>     print row2
>     print
>     for L in M:
>         print L
>         
> if __name__=='__main__':
>         test()
> 
> The idea is to use a single element list as kind of storage facility.
> That enables me to copy a column, then change something in that column
> and make the change turn up in the matrix and even in a previously made
> copy of a row that shared the specific element.
>  
> > Today's little joke: Long ago I would have solved
> > this by storing the data as a list of rows and _also_
> > a list of columns, updating each one any time the
> > other changed. Just goes to show you things
> > could always be worse...
> 
> Well have I ever ... I only thought about this last week and I
> actually thought it was a *good* idea. 

Sorry. If you really want to do this you could keep things
in sync automatically by writing the appropriate __setitem__
and resolving never to modify the data except through that...

def whatever.__setitem__(self, (row,col), value):
  self.rows[row][col] = value
  self.cols[col][row] = value

Seems to me like an, um, "untenable" waste of space. And you'd
need to be certain to never set anything except through
self[row,col]; as far as I can see anything like setrow()
would be a loop "for col in range(width): self[row,col] =".

Hmm. You could keep the data in some object that encapsulates
the two double lists and use some fancy feature (__getattribute__?)
to make certain that the only possible access to the data
was through __getitem__...

> I only gave up on it because
> now I would have to keep  track of how far the two views are out of
> sync, because some operation could use data that was modified by an
> other view. Zipstar transposition is very handy for syncing, but it is
> also very expensive. But probably not for you.
> 
> > Expressing interest is a big mistake...
> 
> How so? ;-)
>  
> > Sometime soon a thread will appear titled something
> > like "indexed attributes" with a stripped-down but
> > functional example of what I have in mind for Matrix
> 
> I can't wait! Keep up the good work.
> 
> P.

-- 
David C. Ullrich


From castironpi at gmail.com  Tue May 13 11:35:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:35:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <7803a03b-c626-4573-b859-6611229cb622@a70g2000hsh.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

Flaming Thunder, the lightning one, looked like [ 255, 210, 255 ], but
the next thing I thought was -40 on green.


From bborcic at gmail.com  Tue May  6 06:43:12 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 06 May 2008 12:43:12 +0200
Subject: parameters to lambda's executed at run time.
In-Reply-To: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
Message-ID: <48203672$1_4@news.bluewin.ch>

One way :

 >>> from functools import partial
 >>> def func(item) : print item

 >>> llist = [partial(func,item) for item in range(5)]
 >>> for thing in llist : thing()

0
1
2
3
4


wyleu wrote:
> I'm trying to supply parameters to a function that is called at a
> later time as in the code below:
> 
> llist = []
> 
> for item in range(5):
>     llist.append(lambda: func(item))
> 
> def func(item):
>     print item
> 
> for thing in llist:
>     thing()
> 
> which produces the result
> 
> IDLE 1.2.1
>>>> ================================ RESTART ================================
>>>>
> <function <lambda> at 0xb716356c>
> <function <lambda> at 0xb71635a4>
> <function <lambda> at 0xb71635dc>
> <function <lambda> at 0xb7163614>
> <function <lambda> at 0xb716364c>
>>>> ================================ RESTART ================================
>>>>
> 4
> 4
> 4
> 4
> 4
> 
> How can one allocate a different parameter to each instance of the
> function rather than all of them getting the final value of the loop?
> 


From mishok13 at gmail.com  Tue May 27 11:13:02 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 18:13:02 +0300
Subject: decorators when?
In-Reply-To: <as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
Message-ID: <192840a00805270813i3bfc6fccja42034f87eac5634@mail.gmail.com>

2008/5/27 David C. Ullrich <dullrich at sprynet.com>:
> On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
> <deets at nospam.web.de> wrote:
>
>>David C. Ullrich wrote:
>>
>>> What version added decorators (using the
>>> @decorator syntax)?
>>>
>>> (Is there a general way I could have found out the answer myself?)
>>>
>>> Is there a somthing such that "from __future__ import something"
>>> will make decorators work in 2.5.2?
>>
>>They do work. They were introduced in python2.4
>
> That's more or less what I thought, but...
>
> Oh. Never mind the details, let's just say that having 2.3 and
> 2.5 installed on the same machine can lead to confusion
> about exactly which one you're running a script under.
> Duh.
>
> Sorry. Thanks. I don't suppose that decorators are available
> from __future__ somehow in 2.3?
>

Nope, they don't.
Anyway, decorators are just a syntactic sugar, why would you need this
feature in 2.3?
>
>>Diez
>
> David C. Ullrich
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From zerty.david at gmail.com  Thu May  8 21:47:59 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 22:47:59 -0300
Subject: Weird bug with an integer
In-Reply-To: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
References: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
Message-ID: <5dc598e30805081847n5e2ed2a5jeb8e8da6263dd11c@mail.gmail.com>

Ps:
When I go to shell and type:rowN = int(0)

rows = [["1223", "11/23/08", "Purchase", "To be shipped", "Gallery Name",
"Art Title[22 of 300]", "$10,000"],#1st row
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"],#2nd row
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"],#etc, obviouslly these info will
be fetched from the db
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"]
                ]
for row in rows:

    colN = int(0)
    for col in row:
        print str(colN) + "," + str(rowN) + " - " + col


It works and print everything correctly Oo
On Thu, May 8, 2008 at 10:44 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Look this slice of code:
>
> rowN = int(0)
>         for row in rows:
>             success = self.resultGrid.AppendRows();
>             colN = int(0)
>             for col in row:
>                 self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
> - 1,colN,isReadOnly = True)
>                 print rowN
>                 self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>
> I am getting this output:
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> (1,)
> Traceback (most recent call last):
>      in populateGrid
>     self.resultGrid.SetCellValue(int(rowN),int(colN),col)
> TypeError: int() argument must be a string or a number, not 'tuple'
>
>
> Why is this happening?
>
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From upton at virginia.edu  Fri May 16 14:54:31 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 14:54:31 -0400
Subject: morning in Python
In-Reply-To: <28kXj.142759$Er2.39732@bignews6.bellsouth.net>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
	<28kXj.142759$Er2.39732@bignews6.bellsouth.net>
Message-ID: <5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>

On Fri, May 16, 2008 at 2:12 PM, inhahe <inhahe at gmail.com> wrote:
>
> "George Sakkis" <george.sakkis at gmail.com> wrote in message
> news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
> On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
>> I'm not an expert in this but what does it mean to emphasize state? It
>> seems the opposite of that would be a) functional programming, and b)
>> passing parameters instead of using global or relatively local variables.
>> And maybe c) coroutines (generators as implemented in Python), although
>> perhaps coroutines could be said to emphasize state inasmuch as they go
>> out
>> of their way to capture, objectify and reuse it (Stackless' microthreads,
>> even moreso). And Python seems to be well-noted for implementing some
>> functional programming methodology, and as for passing parameters it's
>> just
>> as object-oriented as the rest of them.
>>
>> But as I said, I'm not an expert, so let me know if I've gone astray..
>>
>> > I have a proposition to ask you all: Python emphasizes state. Is it
>> > true?
>
> Please don't feed the bots.
>
> --
>
>
> I figured the question was interesting enough to warrant discussion whether
> it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.
>
> Also, if it's a bot I'm floored and the man who wrote it could probably
> solve cancer and world hunger with five lines of asm.
>

Yeah... when he/she/it first appeared the replies were at least mostly
lucid, if not necessarily helpful, and spawned a few interesting
discussions.  Recently it's gone downhill... Could be some sort of bot
that was trying to learn 'speech' patterns and it overloaded its
database.  (I've seen that happen on at least one chatbot...)


From alex.gaynor at gmail.com  Tue May 13 20:06:57 2008
From: alex.gaynor at gmail.com (alex.gaynor at gmail.com)
Date: Tue, 13 May 2008 17:06:57 -0700 (PDT)
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
Message-ID: <ab078e30-26c9-4466-9d9b-8bbc51219b17@59g2000hsb.googlegroups.com>

On May 13, 6:57?pm, Nikhil <mnik... at gmail.com> wrote:
> which one is better? and why?
>
> __len__() is a built-in function of the list object and is updated along
> with the list object elements and will be useful incase the list is very
> huge.
>
> len() is an external method again, which may require the processing
> cycles again.
>
> Is it right?

len() is the correct way to do it, methods that begin with __ are
meant to be more internal.


From nick at craig-wood.com  Mon May 19 06:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 19 May 2008 05:30:03 -0500
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
	<mailman.1327.1211169331.12834.python-list@python.org>
Message-ID: <slrng32lb3.e6k.nick@irishsea.home.craig-wood.com>

Matt Nordhoff <mnordhoff at mattnordhoff.com> wrote:
>  Tommy Nordgren wrote:
> > class MyClass : a_base_class
> >       memberlist=[]
> > 
> > #  Insert object in memberlist when created;
> > #  note: objects won't be garbage collected until removed from memberlist.
> 
>  Just to say, if you wanted to go about it that way, you could avoid the
>  garbage collection problem by using weakrefs:
> 
> <http://docs.python.org/lib/module-weakref.html>

Eg...

from weakref import WeakKeyDictionary

class Test(object):
    _instances = WeakKeyDictionary()
    def __init__(self):
        self._instances[self] = True
        # your normal init stuff here
    @classmethod
    def instances(cls):
        return cls._instances.keys()

print Test.instances()
a = Test()
b = Test()
print Test.instances()
del a
print Test.instances()
del b
print Test.instances()

....

Which prints

[]
[<__main__.Test object at 0xb7d4eb6c>, <__main__.Test object at 0xb7d4eb4c>]
[<__main__.Test object at 0xb7d4eb6c>]
[]


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From dave.g1234 at gmail.com  Fri May 16 18:05:59 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 15:05:59 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com> 
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>
Message-ID: <7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com>

On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>
> > Thanks for the responses.  I'm well aware that the function can be
> > passed in the parameters, passing in the functino as an arg defeats
> > the purpose of what I'm going after.
>
> Why so ?
> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> > but a perfunctory glance looks like we're doing the close to the same
> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> > can pass in other parameters to foo.
>
> I may be wrong (if so please pardon my lack of intelligence and/or
> provide a couple use case), but it looks like you're trying to
> reinvent partial application.
>
> from functools import partial
> def foo(x, y):
>   return x + y
>
> pfoo = partial(foo, 2)
> print pfoo(42)
>
> Don't know if this helps...

Ok, so that solves the issue of the aforementioned compose function.
We could do compose( partialfoo,....) ) etc (although I might say I
prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
provide wrapper around an object that lets you call abritrary
functions on that object with it as a parameter - i.e., as if it were
a method in a class.  The partial function was only a component of the
code I posted earlier. Or am I missing something you're saying?

best
dave




From matthieu.brucher at gmail.com  Wed May 21 17:17:12 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Wed, 21 May 2008 23:17:12 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <e76aa17f0805211417u4262d9a9i9e5cc8d265832209@mail.gmail.com>

2008/5/21 Dave Parker <daveparker at flamingthunder.com>:

> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
> > My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's why there is the Decimal module.
That's why the IEEE standard exists as well, because it is not possible to
always use what you call multi-precision floating point with decent speed.
That's why numerical analysis exists.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From bruno.desthuilliers at gmail.com  Mon May 19 16:46:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:46:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
Message-ID: <92857241-ef7c-482f-a7cb-8ee81edd8317@e53g2000hsa.googlegroups.com>

On 19 mai, 17:53, Henrique Dante de Almeida <hda... at gmail.com> wrote:

(snip)

>  Yes, I was actually referring to statically typed JIT-compiled
> languages. Sorry about that, blame the beers that entered my digestive
> system that night. :-P

for beer in beers:
  if beer.entered_henrique_digestive_system_last_night:
    beer.blame()

!-)


From s0suk3 at gmail.com  Mon May 19 02:08:11 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 18 May 2008 23:08:11 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com> 
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
Message-ID: <3b0ba35b-c2b9-4ab2-8e7c-fecebce465c2@d77g2000hsb.googlegroups.com>

On May 18, 7:25 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Sun, 18 May 2008 16:17:55 -0700 (PDT)
>
> Mensanator <mensana... at aol.com> wrote:
> > I see no need for GUI in any of these applications.
>
> Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)
>
> Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)

I do mostly Internet protocol server/proxy-side applications. One of
the fun things about those kinds of programs is that you get away from
the whole "user interface design" concept, because you normally don't
have to do any kind of user interface (neither command-line-based, GUI-
based, web-based, nor anything), since you're not designing something
to serve an end user, but to work as a lonely daemon and serve some
kind of Internet service. So I think that'd be a good alternative for
you.

Every now and then, however, I do build some interface (mostly GUI),
such as a monitor, notification mechanism, etc. But I never feel like
I'm losing focus on the actual problem; maybe because I develop the
core program first and the think about a possible and optional
interface. Maybe a good suggestion is to put the GUI stuff on another
module or package, and make interface functions or methods to handle
the needed GUI controls, so that the GUI stuff shows up as little as
possible in the core part of the program.


From nagle at animats.com  Sun May 25 21:46:27 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 25 May 2008 18:46:27 -0700
Subject: Getting a set of lambda functions
In-Reply-To: <g1bjcj$u3m$1@aioe.org>
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <483a1319$0$34516$742ec2ed@news.sonic.net>

Martin Manns wrote:
> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda
> functions to use this property for comparison). 
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution
> is not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>>> funclist = [eval('lambda x:' + func) for func in func_strings]

   What are you actually trying to do, anyway?  What's the application?

   You probably don't want to use "eval" that way.  If you want function
objects out, use "compile".

					John Nagle


From goldnery at gmail.com  Fri May 23 11:45:11 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 08:45:11 -0700 (PDT)
Subject: Another Question
Message-ID: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>

How can i bind function that handle the mouse clicking  window X event
or clicking alt+F4


thanks


From bockman at virgilio.it  Mon May  5 13:22:32 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Mon, 05 May 2008 19:22:32 +0200
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <pan.2008.05.05.17.22.31.608410@virgilio.it>

On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:

> Hi,
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
> 
> import conf
> print conf.SomeVariable
> 
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.
> 
> I want to store this data in some conf file (txt) and would like to
> use it same way as I am using these variables as defined in py
> files.
> 
> one solution I can think of is writing data as a dictionary into conf
> file. and then by reading data, apply eval on that data. and update
> local dict? but this is not a good solution....
> 
> any pointers?
> 
> Sandip

 The 'simple but relatively dangerous way', already suggested, is to
 reload() the module. 

A safer way - but requiring more work - could be to build something around
the Configparser module in the standard library ...

Ciao
-----
FB


From castironpi at gmail.com  Fri May 16 11:43:52 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:43:52 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <90c5b91a-06a5-4e2e-b166-dda83e899366@m36g2000hse.googlegroups.com>

On May 16, 6:43?am, Ant <ant... at gmail.com> wrote:
> Hi all,
>
> I have a question on PyParsing. I am trying to create a parser for a
> hierarchical todo list format, but have hit a stumbling block. I have
> parsers for the header of the list (title and description), and the body
> (recursive descent on todo items).
>
> Individually they are working fine, combined they throw an exception.
> The code follows:
>
> #!/usr/bin/python
> # parser.py
> import pyparsing as pp
>
> def grammar():
> ? ? ?underline = pp.Word("=").suppress()
> ? ? ?dotnum = pp.Combine(pp.Word(pp.nums) + ".")
> ? ? ?textline = pp.Combine(pp.Group(pp.Word(pp.alphas, pp.printables) +
> pp.restOfLine))
> ? ? ?number = pp.Group(pp.OneOrMore(dotnum))
>
> ? ? ?headtitle = textline
> ? ? ?headdescription = pp.ZeroOrMore(textline)
> ? ? ?head = pp.Group(headtitle + underline + headdescription)
>
> ? ? ?taskname = pp.OneOrMore(dotnum) + textline
> ? ? ?task = pp.Forward()
> ? ? ?subtask = pp.Group(dotnum + task)
> ? ? ?task << (taskname + pp.ZeroOrMore(subtask))
> ? ? ?maintask = pp.Group(pp.LineStart() + task)
>
> ? ? ?parser = pp.OneOrMore(maintask)
>
> ? ? ?return head, parser
>
> text = """
>
> My Title
> ========
>
> Text on a longer line of several words.
> More test
> and more.
>
> """
>
> text2 = """
>
> 1. Task 1
> ? ? ?1.1. Subtask
> ? ? ? ? ?1.1.1. More tasks.
> ? ? ?1.2. Another subtask
> 2. Task 2
> ? ? ?2.1. Subtask again"""
>
> head, parser = grammar()
>
> print head.parseString(text)
> print parser.parseString(text2)
>
> comb = head + pp.OneOrMore(pp.LineStart() + pp.restOfLine) + parser
> print comb.parseString(text + text2)
>
> #===================================================================
>
> Now the first two print statements output the parse tree as I would
> expect, but the combined parser fails with an exception:
>
> Traceback (most recent call last):
> ? ?File "parser.py", line 50, in ?
> ? ? ?print comb.parseString(text + text2)
> .
> . [Stacktrace snipped]
> .
> ? ? ?raise exc
> pyparsing.ParseException: Expected start of line (at char 81), (line:9,
> col:1)
>
> Any help appreciated!
>
> Cheers,
>
> --
> Ant.

I hold that the + operator should be overloaded for strings to include
newlines.  Python 3.0 print has parentheses around it; wouldn't it
make sense to take them out?


From michele.simionato at gmail.com  Thu May 29 07:19:12 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 29 May 2008 04:19:12 -0700 (PDT)
Subject: cmd.Cmd bug or at least docu-bug
References: <6a7b72F3467inU1@mid.uni-berlin.de>
Message-ID: <78925615-83f4-4197-a922-6e34287774e9@34g2000hsf.googlegroups.com>

On May 29, 11:26?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Hi,
>
> I'm fiddling around with module cmd. I tried to pass my own streams as
> replacements for stdin and stdout. However, stdin wasn't working. After a
> look into the sourcecode I discovered that there is an class-variable
> called
>
> use_rawinput
>
> that prevents using the passed stdin. I then read the docs again - and found
> it described. However, I think it should be mentioned on the first page
> where the constructor is described that without setting use_rawinput to
> False, stdin will be ignored.
>
> Or even better either make use_rawinput set to false in case stdin is passed
> anything but None or at least make it a keyword argument.
>
> Any thoughts about this?
>
> Diez

I run into the same issue and I solved it by using a custom subclass
of Cmd, but I agree
that the cmd module could be improved. I even wrote a cmd2 module that
I should publish
one day or another. +1 to submit a bug report.

 Michele Simionato


From upton at virginia.edu  Thu May 22 00:59:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 00:59:44 -0400
Subject: related to python
In-Reply-To: <g12m30+ejo5@eGroups.com>
References: <g12m30+ejo5@eGroups.com>
Message-ID: <5504f9ac0805212159u174437ccs4409d83381c6a804@mail.gmail.com>

This looks like a homework assignment, but...

On Wed, May 21, 2008 at 10:34 PM, salil_reeves <salil_reeves at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');

I think a question similar to this was answered on the list today or
yesterday, for removing spaces and hyphens.

> 2. stripping away any leading and trailing blank spaces; and

If your solution for part 1 can't be extended to cover this... you
might have to find another way to "strip" the the spaces ;)

> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.

Assuming you have some sort of dictionary mapping words to ELIZA
words, you should be able to iterate through all of the words in the
input and, using that dictionary, swap the key for the value in your
input string.

There, I think those are sufficiently vague as to not do your homework
for you, but maybe get you started...


From daveparker at flamingthunder.com  Wed May 21 11:34:15 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 08:34:15 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
Message-ID: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>

On May 20, 7:05?pm, Collin <collinye... at shaw.ca> wrote:

> Personally, FT is a bit meh to me. The way you issue your statements I
> always think something is wrong, mainly because when I want to define,
> say, x, in python I'd go:
>
> x = "whatever"
>
> Instantly noting that I defined x. While in Flaming Thunder I'd have to
> type:
>
> Set x to "whatever"
>
> It just feels wrong.

Actually, it felt wrong to me when I first started working on Flaming
Thunder because I've been programming for decades and have had all of
the programming idioms burned into my brain.

But after getting input from children and teachers, etc, it started
feeling right.

For example, consider the two statements:

     x = 8
     x = 10

The reaction from most math teachers (and kids) was "one of those is
wrong because x can't equal 2 different things at the same time".
Many computer languages conflate "equality" with "assignment" and then
go to even more confusing measures to disambiguate them (such as using
== for equality, or := for assignment).

Plus, symbols are more confusing for people to learn about than
words.  There are lots of people who are fluent in English, but
dislike math.

So, I opted for a simple, unambiguous, non-mathematical way of
expressing "assignment" which makes sense even to the non-
mathematically inclined:

     Set x to 8.

That way, = can be reserved unambiguously and unconfusingly for the
mathematical notion of "equality" -- because it's in their math
classes that people learn what = means:

Set QuadraticEquation to a*x^2 + b*x + c = 0.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:17:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:17:02 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
Message-ID: <48327ae9$0$15299$426a74cc@news.free.fr>

notnorwegian at yahoo.se a ?crit :
> i am confused.
> 
> x=5
> y=5
> 
> x==y -> True
> x is y -> True
> 
> shouldnt x is y return False since they shouldnt(dont?) point to the
> same place in memory, they just store an equal value?

Python's "variable" do not "store values", they are name to object 
bindings. x = 5 is a shortand for globals()['x'] = int(5), which means 
"create an int instance with value 5 and bind it to the name 'x' in the 
global namespace'. wrt/ the identity test yielding true, it's the result 
of a CPython specific optimisation for small integer objects, that are 
cached and reused. Since Python integers are immutable, they can safely 
be shared. Now since it's an implementation specific thing, you should 
by no mean rely on it.



From __peter__ at web.de  Fri May 23 04:48:16 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:48:16 +0200
Subject: KeyError in pickle
References: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com>
Message-ID: <g160ce$r41$01$1@news.t-online.com>

christof wrote:

> I am using pickle/unpickle to let my program save its documents to
> disk. While this it worked stable for a long time, one of my users now
> complained, that he had a file which can't be loaded.
> 
> The traceback is:
> 
>     File "pickle.pyo", line 1374, in loads
>     File "pickle.pyo", line 858, in load
> KeyError: 'A'
> 
> 
> Does anybody know this problem. How this can happen and how can I
> avoid it?

Is this reproducible? How? If not I would guess that the file is corrupted.

Peter


From afrobeard at gmail.com  Tue May 13 18:39:25 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:39:25 -0700 (PDT)
Subject: What is self.file = file for?
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>

If you are familiar to C++ or a similar language, the concept of the
this pointer might not be alien to you. self in this context is
basically a reference to the class itself. Hence self.file is creating
a class member and setting to the input from file.

As Gary pointed out, during initialization, only the latter parameter
i.e. file is being passed to __init__

You can get a brief tutorial from http://docs.python.org/tut/node11.html
about classes in python.

On May 14, 3:08?am, wxPytho... at gmail.com wrote:
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
> ? ? """Print and number lines in a text file."""
> ? ? def __init__(self, file):
> ? ? ? ? self.file = file
> ? ? ? ? .
> ? ? ? ? .
> ? ? ? ? .
>
> When would you do a thing like ?self.file = file ?? I really don't
> find an answer on this. Please help me understand this.



From mensanator at aol.com  Thu May  1 14:34:44 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 1 May 2008 11:34:44 -0700 (PDT)
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
References: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>
Message-ID: <72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>

On May 1, 8:11?am, prabain... at gmail.com wrote:
> ? ? ? ? ? ? ? ? ? ? HELLO FRIEND IAM SHALINI,
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? DO U WANT TO KNOW ABOUT
> SCIENTOLOGY?

Do I need to know about wiping my ass with a rock?

Oh, wait...that's Islam, isn't it?

Sorry, I often get those two confused.

Scientology and ass wiping.

>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?PLS LOOK AT THE BELOW
> WEBSITE.
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?www.bigconcern3.blogspot.com


From wizzardx at gmail.com  Sat May  3 15:54:55 2008
From: wizzardx at gmail.com (David)
Date: Sat, 3 May 2008 21:54:55 +0200
Subject: State machine Example in Python
In-Reply-To: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
References: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
Message-ID: <18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>

On Sat, May 3, 2008 at 6:26 PM, Alok Kumar <alokkat at gmail.com> wrote:
> Can someone please redirect me for a state machine example or design pattern
> used in Python.
>

Google for it, eg:

http://www.google.com/search?q=python+state+machine

There's plenty of results. Be more specific if you can't get what you
want from Google.

David.


From rschroev_nospam_ml at fastmail.fm  Tue May 20 15:27:55 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 20 May 2008 21:27:55 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
Message-ID: <0DFYj.28609$ie5.21801@newsfe05.ams2>

Wow this resulted in far more reactions than I had expected ...

bruno.desthuilliers at gmail.com schreef:
> On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
> wrote:
>> Bruno Desthuilliers schreef:
>>
>>> 1/ being interpreted or compiled (for whatever definition of these
>>> terms) is not a property of a language, but a property of an
>>> implementation of a language.
>>> 2/ actually, all known Python implementations compile to byte-code.
>> You keep saying that, and in theory you're right.
> 
> "In theory" ??? Heck, both points above are mere facts. Well, I may
> accept that the 2nd one is a bit overgeneralized, since IIRC there's
> an experimental Python to javascript "compiler" in Pypy, but...
> 
>>  But I'm still inclined to disagree with it,  since the practical reality is different.
> 
> Do you mean that how source code written in a language (that is : a
> grammar  + a syntax) finally become a set of instructions executed by
> a CPU depends on the language (I repeat : a grammer + a syntax), and
> not on a piece of software turning the source code into something that
> can actually be executed by the CPU ?

No, that's not what I said; what I said is that some languages where 
designed with in the back of the head the idea that they were going to 
be compiled to native code, others to be interpreted, and others to be 
compiled to byte code.

Wikipedia says about C that "its design goals were for it to be compiled 
using a relatively straightforward compiler, provide low-level access to 
memory, provide language constructs that map efficiently to machine 
instructions, and require minimal run-time support". To me, that very 
strongly suggests that it was meant to be compiled to native code. It's 
called "portable assembly" for a reason. You *can* make it work in 
another way, and I suppose that it *is* done, but those implementations 
are far in the minority.

As for Python, until the advent of PyPy all implementations I known used 
a virtual machine (CPython, Jython, IronPython). And PyPy is still 
experimental as far as I know.

So yes, the transformation method from source code to something that the 
CPU understands depends on your tools. But if you want to get work done, 
the most common method by far for C is to use a toolchain that compiles 
to native code and for Python a byte code compiler + virtual machine. 
With possibly a JIT compiler, that's true.

>> Python is
>> indeed compiled to byte code, but if you compare that byte code with
>> assembly code you'll see that there's a whole world of difference
>> between the two,
> 
> Obviously, yes - at least for all assembly language I've seen so far.
> But whoever said otherwise ?

Whenever someone says that Python is interpreted, you respond saying 
that that's not true, since it's compiled to byte code. Correct of 
course, but somehow it appears to me that you imply that that makes 
Python closer to a C-like language than to an interpreted language, and 
that's not correct (IMO). If that's just a misinterpretation by me, I 
apologize.

>>  largely because of the dynamical nature of Python. Fact
>> is that Python was designed from the start to run on a virtual machine,
>> not on the native hardware.
> 
> Nope. The facts are that
> 1/ Python (the language) has *not* been designed with ease of
> implementation of an optimizing native-code compiler in mind,  and
> 2/ CPython (the first and reference implementation) has been designed
> to use a byte-code + VM scheme

Isn't that more or less the same as what I said?

Maybe I don't make enough distinction between Python the language and 
CPython the implementation, but Python development does happen on the 
CPython implementation (Python 3.0 alpha releases are CPython releases, 
for example).

> 
>> C OTOH was designed to be compiled to assembly code (or directly to
>> machine code)
> 
> Note quite. C has been designed to make it as easy as possible to
> write either a C to assembly or C to native binary code compiler.

I find it hard to believe that during the development of C Dennis 
Ritchie was considering any other mode of operation than compilation to 
assembly or machine code. I might be wrong of course.

>> and as a result there are no (or virtually) no
>> implementations that interpret C or compile it to bytecode.
> 
> There's at least one (possibly incomplete) C interpreter.

I'd like to call that the exception that confirms the rule.

> There's a very naive belief we saw every here and then here, which is
> that "Python would be faster if it was compiled to native code". The
> point is that, given Python's (as a language) extrem dynamism,
> compiling it to native code wouldn't buy you much in terms of raw
> performances. The problem is not with writing a native-code
> compiler[1}, but with writing an *optimising* native-code compiler.

I admit I'm guilty of that belief. I know it's true what you say, but I 
  do have the more-or-less unconscious reflex 'compiled to native code 
== fast'.

> I'm just getting fed up with
> this "Python is an interpreted and therefore slow language" non-
> sense.  Python is a language, and as such is neither slow nor fast nor
> interpreted nor compiled nor <insert any implementation related stuff
> here>. And while CPython is not blazingly fast for computation-heavy
> stuff, it's not because it is "interpreted" - which it is not for a
> strict definition of "interpreted", but anyway...  - but because
> *optimizing* execution of an highly dynamic language is nothing,
> well,  err, trivial.

So you are saying that CPython is relatively slow because Python is a 
highly dynamic language. I know that CPython is not Python and Python is 
not CPython, but there is a very strong association between the two and 
therefore I think it's not really that much wrong to simplify that to 
'Python is slow because it is a highly dynamic language (until proven 
wrong by PyPy or another fast implementation'.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From kyosohma at gmail.com  Tue May 13 13:44:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 10:44:16 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>

On May 13, 10:28?am, Paul Miller <neokos... at gmail.com> wrote:
> Does anyone know of any (preferably largish) examples of literate
> programs written using Python? ?Alternatively, does anyone know of any
> literate programming tools which support Python well? ?(I am aware of
> Leo and I've been to literateprogramming.com, but any additional
> pointers would be much appreciated!)
>
> Thanks,
>
> Paul

Check out Zope, bittorrent, or Editra. You should just go to
SourceForge and do a search for projects done in Python.

Mike


From johnjsal at NOSPAMgmail.com  Tue May 20 00:09:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 00:09:14 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 19:06:10 +0100
"Matt Porter" <mabbikeel at gmail.com> wrote:

> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>   "AAAABBBC" -> "ABC"

Not that you need help anymore, but I decided to give it a try. Not as elegant as the one- and two-liners, but somewhat concise I guess.

def compress(s):
    new = [s[:1]]

    for c in s[1:]:
        if c not in new:
            new.append(c)
    return ''.join(new)


From tarundevnani at gmail.com  Wed May  7 08:25:12 2008
From: tarundevnani at gmail.com (tarun)
Date: Wed, 7 May 2008 17:55:12 +0530
Subject: Some issue with right click in TreeCtrl
Message-ID: <c88245360805070525w2ae8e5fbq603c3088ae1f3c13@mail.gmail.com>

Hello All,

Please find the code for a simple wx.TreeCtrl code. Whenever I right click
on any item in the Tree, I see the function, 'OnSelChanged' gets called
twice.

What I've just done is that I've associated the function 'OnRightClick' with
wx.EVT_TREE_ITEM_RIGHT_CLICK. And in this function, I say
self.tree.SelectItem(evt.GetItem(),True) to select the item and then so some
action for right click.

Can any one help.

Thanks & Regards,
Tarun

*Please find the code in the attachment and also below:-*

import wx
tests = ["All Tests",
  ["Suite1",
    "test01",
             "test02",
             ["suite2","test03","test04"],
    "test05",
  ],
  ["Suite3",
    "test06",
    "test07"
  ],
  ["Suite4",
    "test08",
    "test09"
  ],
  "test10",
  "test11",
]
class TestFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Simple Tree", size=(400,500))
        # Create the tree
        self.tree = wx.TreeCtrl(self)
        # Add a root node
        root = self.tree.AddRoot(tests[0])
        # Add nodes from our data set
        self.AddTreeNodes(root, tests, 0)
        # Bind some interesting events
        self.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, self.tree)
        self.Bind(wx.EVT_TREE_ITEM_RIGHT_CLICK, self.OnRightClick,
self.tree)
        # Expand the first level
        self.tree.Expand(root)

    def AddTreeNodes(self, father, aTestList,count):
        if type(aTestList) == type([]):
            l = len(aTestList)
            i = 0
            while i < l:
                if i == 0:
                    if count ==1:
                        father = self.tree.AppendItem(father, aTestList[i])
                else:
                    self.AddTreeNodes(father, aTestList[i],
1)
                i = i + 1
        if type(aTestList) == type(""):
            self.tree.AppendItem(father, aTestList)

    def OnRightClick(self, evt):
        self.tree.SelectItem(evt.GetItem(),True)
        print 'In OnRightClick Function...',self.GetItemText(evt.GetItem())

    def GetItemText(self, item):
        if item:
            return self.tree.GetItemText(item)
        else:
            return ""

    def OnSelChanged(self, evt):
        print "OnSelChanged:   ", self.GetItemText(evt.GetItem())

app = wx.PySimpleApp(redirect=True)
frame = TestFrame()
frame.Show()
app.MainLoop()
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From python at bc90021.net  Sun May 11 16:12:38 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 20:12:38 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<Xns9A9BD4DD2720duncanbooth@127.0.0.1>
Message-ID: <WqIVj.32521$KJ1.6884@newsfe19.lga>

On Sun, 11 May 2008 19:55:31 +0000, Duncan Booth wrote:

> 7stud <bbxx789_05ss at yahoo.com> wrote:
> 
> 
>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\"
>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? +
>> self.matrix[c][0] + "_other.txt\""
> 
> It wouldn't exactly result in either of the error messages you posted,
> but I expect the spurious quote marks round the filename will be giving
> you problems.
> 
> Surely you want the filename to be something like
> 'proctemp\fred_other.txt' rather than '"proctemp\fred_other.txt"' with
> the spurious double quotes?

Yup, that's what it was.  I figured it out two seconds before this post.  
However, it will be interesting to see how it handles files with spaces 
in the name...

Thanks for your help!



From zerty.david at gmail.com  Thu May  1 20:31:01 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 1 May 2008 21:31:01 -0300
Subject: Problems with psycopg2
Message-ID: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>

Hi all
I have this function:
def checkName(self, name):
        cur = self.conn.cursor()

        sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
        cur.execute(sql)
        rows = cur.fetchall()

        if rows == "[]":
            self.insert()

It seems to work fine, But I'm getting this exception:
psycopg2.ProgrammingError: current transaction is aborted, commands ignored
until end of transaction block
at: cur.execute(sql)

What's the problem?
thx

ps: fn_pat is the column of the db, name is the string passed in the
function parameter
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From sn at sncs.se  Fri May 23 11:30:36 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Fri, 23 May 2008 08:30:36 -0700 (PDT)
Subject: How to print a sorted list as a multi-column table
Message-ID: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>

Hi all,

I would like to ask about opinions about the best way to format sorted
tables of items for interactive use. I have begun to add interactive
help to Guppy/Heapy (http://guppy-pe.sourceforge.net) because it lacks
the usual ways for introspection (see for example
http://www.pkgcore.org/trac/pkgcore/doc/dev-notes/heapy.rst) which is
due to Heapy's use of dynamic things like __getattr__ and to some
extent properties.

There seems to be no (good or otherwise) way to hook into the standard
help() (?) (At least not before 2.6 where I recall seeing a __dir__
magic method may be introduced, but I want it to be backwards
compatible to at least 2.4, preferably to 2.3.)

So I am about to roll my own help system. It will be based on having
the API objects supplying a standardized '.help' attribute which can
be used interactively, and will limit the output it prints to say 15
or 20 rows at a time.

That's for a background. Now what I was stumbling on which pumped up
enough adrenalin to make me begin to write this ---

Why are tables formatted like the following, when sorted? (Both in
linux eg ls, ftp help, and in Python help() when listing (eg)
modules))

(1)

a  g  m  s
b  h  n  t
c  i  o  u
d  j  p  v
e  k  q
f  l  r

Wouldn't it be more natural to just sort them like this:

(2)

a  b  c  d
e  f  g  h
i  j  k  l
m  n  o  p
q  r  s  t
u  v

What's the rationale for the choice of (1)?

In a pager, if you want to limit the number of lines output at a time,
then yo'd see with (1) (if artifically limiting output to 2 lines):

a  g  m  s
b  h  n  t

So to see the f item you would have to scroll down all the way.  The
number of times you would have to scroll down is in completely
unrelated to the item's position in sort order. That seems to defeat
the purpose of sorting in the first place. It feels strange, to me at
least. Anybody had the same feeling?

Well, what's the rationale (if any) for using the layout (1)?
Wouldn't layout (2) be better? And/or would it be confusing /
non-pythonic / non-unlixonic if a program used the (2) layout instead?

Have a (:nice:) weekend :-)

Sverker


From mail at timgolden.me.uk  Wed May  7 03:58:33 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 08:58:33 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
Message-ID: <48216129.5090405@timgolden.me.uk>

Unknown Hero wrote:
> Tim Golden wrote:

[... snip long example ...]

> Correct me if I'm wrong (which I just might be), but doesn't the above
> code go through the keys behind HKEY_LOCAL_MACHINE\Software\Timsoft\ ?
> 
> Is it possible to use an empty value in:
> 
>   hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
> 
> like:
> 
>   hTimSoft = _winreg.OpenKey (HKLM, "")
> 
> so it would go all subkeys behind the "root" (in this case,
> HKEY_LOCAL_MACHINE)?

Yes. (Well, you can try it and find out for yourself!). As I said, this
was code to illustrate some other poster's difficulty. I assume that
you're capable of twisting it to suit your own purposes :)

> The code is supposed to work even if I don't know all possible subkeys
> under HKEY_LOCAL_MACHINE. Creating dozens or hundreds of handles like
> the above is a bit... unappealing.
> 
> Can I also use HKLM in the place of hTimSoft when I want to determine
> the amount of subkeys it has, like you did over here:

Yes. You can put any key handle you like in place of my
hTimSoft of the predefined _winreg.HKEY_LOCAL_MACHINE. They're
just keys. I assume you'll want some kind of recursive function which
combines calls to EnumKeys and EnumValues. 

> Anyway, the above code seems interesting. I'll try a few tweaks here
> and there and see what happens.

I wasn't sure just how experienced you were with programming; although you
said you were new to Python I thought you might have experience elsewhere
which would help you out here. If you're really stuck, post back and I (or someone
else) can try to knock up a more pertinent example. The main thing is for you
to get hold of the _winreg docs -- which I know you mentioned before -- and to
grasp what the concepts are and how the API calls work. It's a low-level module,
simply exposing the raw API calls, which is why there are several wrapper modules
around it, but it's worth getting to understand what's going on under the covers.

TJG



From s0suk3 at gmail.com  Mon May 19 11:48:42 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Mon, 19 May 2008 08:48:42 -0700 (PDT)
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
Message-ID: <e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>

On May 19, 10:25 am, "Alan Wright" <alan.wri... at volubill.com> wrote:
> Hi Folks,
> I am newbie to Python, but have successfully created a simple client and
> server setup, I have one issue though.
>
> I am trying to test a box by sending many TCP conns (WHILE loop) but not
> closing them with a FIN/RST. However, no matter what i do, i cannot get the
> loop to stop sending FIN from the client.
>
> Any clues?
>
> Here is my current script
>
> #!/usr/bin/python
>
> import socket,sys
> from numpy import *
> num1=0
>
> while (num1<=10) :
>
>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>  s.settimeout(10.0)
>  s.connect(("10.1.1.69", 50008)) # SMTP
>  print s.recv(1024) + '\n',
>  num1=num1+1
>  #s.close()
>
> sys.exit(1)

socket.socket instances do an implicit close() on the socket when the
object is destructed (in this case, it's destructed when it is garbage-
collected). What's happening is that on each iteration, the variable
"s", which references the socket.socket instance, is assigned to a new
socket.socket instance, therefore the instance of the previous
iteration is no longer referenced by "s", and since it's no longer
referenced by anything, the instance is garbage-collected,
automatically imposing an implicit close() on that instance. A simple
solution could be to create a list and append the socket.socket
instance of each iteration to that list, that way the instances would
remain referenced in the list and not be garbage-collected; though you
might be able to find a more elegant solution.

Sebastian


From python at bc90021.net  Sun May 11 13:59:13 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:59:13 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<mailman.943.1210528308.12834.python-list@python.org>
Message-ID: <RtGVj.32506$KJ1.14616@newsfe19.lga>

On Sun, 11 May 2008 10:51:34 -0700, Gary Herron wrote:

> bc90021 wrote:
>> Hi All,
>>
>> Thanks in advance for any and all help!
>>
>> I have this code:
>>
>> g = open(fileName, 'a')
>>   
>>   
> I don't believe you.  I think you have something like
> 
>     g = open('fileName', 'a')
> 
> instead of (as you claim)
> 
>     g = open(fileName, 'a')
> 
> Do you see the difference?
> 
> Develop the skill of reading the error messages *very* carefully.  Your
> error says there is no file named "fileName", and if you think about
> what's on your disk, I'll bet you won't find a file whose name is
> "fileName".
> 
> 
> Gary Herron
> 
Gary,

I can assure you that that's not the case.  (Of course, you're free to 
believe me or not believe me at your convenience.)  You are right that I 
don't have that file on the disk - it is supposed to be created with the 
"open" line!  It works *perfectly* outside the class the inherits from 
threading.Thread; inside the threading.Thread class it does NOT create 
the file, whether I use g = open(fileName, 'a') or g = open (fileName, 
'w').  Hence my obvious confusion.


From victorsubervi at gmail.com  Thu May  1 18:31:25 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 1 May 2008 17:31:25 -0500
Subject: Custom Classes?
In-Reply-To: <1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
Message-ID: <4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>

On Wed, Apr 30, 2008 at 12:35 PM, J. Cliff Dyer <jcd at unc.edu> wrote:

> Post working code, and I'll answer your actual question.


Good grief!  The code is *not* double spaced! Take a look. Click to the end
of the first line and hit the right arrow key, and see for yourself.  As for
not initializing w, well, I did in my code and just forgot to cut and paste
that. Same with the except. Sorry on those. And yes, I pull out try clauses
when I need to look at stacks. Here:

w = 0

try:

  w += 1

  getpic = "getpic" + str(w) + ".py"

  try:

    os.remove(getpic)

  except:

    pass

  code = """

#!/usr/local/bin/python

import cgitb; cgitb.enable()

import MySQLdb

import cgi

import sys,os

sys.path.append(os.getcwd())

from login import login

user, passwd, db, host = login()

form = cgi.FieldStorage()

picid = int(form["id"].value)

x = int(form["x"].value)

pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\

9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}

pic = pics[x]

print 'Content-Type: text/html'

db = MySQLdb.connect(host=host, user=user, passwd=passwd, db=db)

cursor= db.cursor()

sql = "select " + pic + " from products where id='" + str(picid) + "';"

cursor.execute(sql)

content = cursor.fetchall()[0][0].tostring()

cursor.close()

print 'Content-Type: image/jpeg'

print

print content

"""

  script = open(getpic, "w")

  script.write(code)

  print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">' % pic

  print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d, y)

except:

  pass


TIA,
Victor
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From zxo102 at gmail.com  Sat May 24 18:59:55 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 15:59:55 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in 
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
Message-ID: <e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>

But this is not "\xED\x6F\x3C\x01".  I need it for
struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
(IEEE 754).
Any other suggestions?

ouyang

On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> [ zxo102 <zxo... at gmail.com> ]
>
> >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > "\xED\x6F\x3C\x01" in python coding?
> > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > the error information : invalid \x escape.
>
> [1]--> 'ED6F3C01'.decode('hex')
> Out[1]: '\xedo<\x01'
>
> - --
> Freedom is always the freedom of dissenters.
>                                       (Rosa Luxemburg)
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2.0.9 (GNU/Linux)
>
> iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> =jxll
> -----END PGP SIGNATURE-----



From notnorwegian at yahoo.se  Sun May 25 03:10:45 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 00:10:45 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
Message-ID: <6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>

On 25 Maj, 08:56, Rares Vernica <ra... at ics.uci.edu> wrote:
> use a set to store them:
>
> >>> s=set()
> >>> s.add('a')
> >>> s.add('b')
> >>> s
> set(['a', 'b'])
> >>> s.add('a')
> >>> s
> set(['a', 'b'])
> >>> s.add('c')
> >>> s
>
> set(['a', 'c', 'b'])
>
>
>
> it does remove duplicates, but is it not ordered. to order it you can
> use:
>
> >>> l=list(s)
> >>> l.sort()
> >>> l
>
> ['a', 'b', 'c']
>
> hth,
> Rares

sets dont seem to be so good because there is no way to iterate them.

s.pop()  	 	remove and return an arbitrary element from s; raises
KeyError if empty

i dont want to remove i just want to get the string that is stored
there.


From stefan_ml at behnel.de  Sat May 24 02:18:37 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 24 May 2008 08:18:37 +0200
Subject: simple url regexp
In-Reply-To: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>
References: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>
Message-ID: <4837B33D.4080007@behnel.de>

notnorwegian at yahoo.se wrote:
> url = re.compile(r"((http|ftp|https)\:\/\/)(www)?([a-zA-Z]{1}([\w\-]+
> \.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+
> \.[\w]{3,4})?((\?\w+=\w+)?(&\w+=\w+)*)?")
> 
> damn i hate these things.
> 
> i want it to only match http://www.name.any/etc
> 
> not http://wiki.x etc

Why don't you use urlparse and check the result yourself?

Stefan


From notnorwegian at yahoo.se  Sat May 24 01:18:58 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 22:18:58 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
	<87mymgb8hn.fsf@benfinney.id.au>
Message-ID: <5def9628-1332-4c18-b123-e5eef1a810d1@t54g2000hsg.googlegroups.com>

On 24 Maj, 07:01, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> notnorweg... at yahoo.se writes:
> > On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > Can you tell us exactly which programs you mean when you say "the
> > > shell" and "the commandprompt"?
>
> > commandprompt = windows dos-windows
>
> > shell = standard python interactive prompt
>
> Thanks.
>
> Be aware that referring to "the shell" without further qualification
> is usually understood to mean "the operating system shell", i.e. the
> command shell provided for running operating system commands.
>
> So, you're asking about the difference in behaviour between "the
> Windows command shell" versus "the Python interactive shell".
>
> --
>  \        ?I cannot conceive that anybody will require multiplications |
>   `\          at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
> _o__)                                                      Wales, 1936 |
> Ben Finney

yes


From mail at timgolden.me.uk  Thu May 15 12:09:19 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 15 May 2008 17:09:19 +0100
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <482C602F.4070203@timgolden.me.uk>

globalrev wrote:
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
> 
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()

Ummm. These are not the same files (unless you've got some bizarre
NTFS linking going on).

> exists returns false but when i open it doesnt complain. how come?

Also, in general, you're prone to race conditions if you do this
kind of thing, altho' on a local C: drive that's less likely. But
still possible. Probably better to wrap the open in a try-except
and handle an IOError.

TJG


From ptmcg at austin.rr.com  Fri May  9 18:54:21 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 9 May 2008 15:54:21 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
Message-ID: <1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>

On May 9, 5:19?pm, globalrev <skanem... at yahoo.se> wrote:
> i want to a little stringmanipulationa nd im looking into regexps. i
> couldnt find out how to do:
> s = 'poprorinoncoce'
> re.sub('$o$', '$', s)
> should result in 'prince'
>
> $ is obv the wrng character to use bu what i mean the pattern is
> "consonant o consonant" and should be replace by just "consonant".
> both consonants should be the same too.
> so mole would be mole
> mom would be m etc

from re import *
vowels = "aAeEiIoOuU"
cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
encodeRe = re.compile(r"([%s])[%s]\1" % (cons,vowels))
print encodeRe.sub(r"\1",s)

This is actually a little more complex than you asked - it will search
for any consonant-vowel-same_consonant triple, and replace it with the
leading consonant.  To meet your original request, change to:

from re import *
cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
encodeRe = re.compile(r"([%s])o\1" % cons)
print encodeRe.sub(r"\1",s)

Both print "prince".

-- Paul

(I have a pyparsing solution too, but I just used it to prototype up
the solution, then coverted it to regex.)


From bj_666 at gmx.net  Sat May 24 07:35:49 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 May 2008 11:35:49 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <69qcslF33dagrU5@mid.uni-berlin.de>

On Sat, 24 May 2008 13:12:13 +0200, Johannes Bauer wrote:

> Carl Banks schrieb:
> 
>> p = myfunction()
>> if p:
>>     print p
>> 
>> (I recommend doing it this way in C, too.)
> 
> This is okay for if-clauses, but sucks for while-loops:
> 
> while (fgets(buf, sizeof(buf), f)) {
> 	printf("%s\n", buf);
> }
> 
> is much shorter than
> 
> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> 	printf("%s\n", buf);
> 	tmp = fgets(buf, sizeof(buf), f);
> }

Can be written in Python as:

from functools import partial

# ...

for buf in iter(partial(f.read, buf_size), ''):
    print '%s\n' % buf

Ciao,
	Marc 'BlackJack' Rintsch


From banibrata.dutta at gmail.com  Tue May  6 09:51:05 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 19:21:05 +0530
Subject: Module to read input from commandline
In-Reply-To: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
References: <mailman.649.1210079867.12834.python-list@python.org>
	<dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
Message-ID: <3de8e1f70805060651r70767637wb6820fc156411a32@mail.gmail.com>

something like "curses" but w/o the fancy window decorations perhaps ?
if so, then following link might help (
http://www.amk.ca/python/howto/curses/).

thanks & regards,
banibrata

On Tue, May 6, 2008 at 6:56 PM, <james at reggieband.com> wrote:

> On May 6, 2:11 pm, pyt... at bdurham.com wrote:
>
> > Check out the optparse module as well. The optparse module supercedes(?)
> > the cmd module and offers a lot more functionality.
>
> Hi Malcom,
>
> Doesn't the optparse module work by parsing the arguments that are
> passed to the script when it is invoked?
>
> What I was looking for was a commandline read loop that executes
> within a script that is already running ... or can optparse be used in
> this context as well?
>
> Thanks,
> James.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From spectrumdt at gmail.com  Fri May  9 06:16:57 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 03:16:57 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <637ecc42-63f2-4ab0-b126-83059634f099@s50g2000hsb.googlegroups.com>

Thanks for all the replies.

On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> Ctrl+C often works with Python, but as with any language, it's possible
> to write a program which will not respond to it. ?You can use Ctrl+\
> instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> Ctrl+\ sends SIGQUIT which typically isn't)

Yes, thank you, this seems to work. :)

I did some more testing and found out that the problem seems to be
thread-related. If I have a single-threaded program, then Ctrl+C
usually works, but if I have threads, it is usually ignored. For
instance, the below program does not respond to Ctrl+C (but it does
die when issued Ctrl+\):



import threading

def loop():
  while True:
    pass

threading.Thread(target=loop,args=()).start()


From duncan.booth at invalid.invalid  Mon May 19 03:56:33 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 May 2008 07:56:33 GMT
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<MwBXj.47168$3v1.19158@bignews3.bellsouth.net>
Message-ID: <Xns9AA35AABD7931duncanbooth@127.0.0.1>

Hans Nowak <zephyrfalcon!NO_SPAM!@gmail.com> wrote:

> The way I see it, a class method is really just sugar for a function
> operating on the class, living in the class namespace.  As such, they
> are basically redundant, and as you point out, they can always be
> replaced by a function outside the class (and in fact, this was what
> people did before they came along in 2.2).  Personally, I don't use
> them... but some people like them.  Different strokes, and all that...
> 

In exactly the same way you could claim that a method is just sugar for a 
function operating on the instance living in the instance namespace. As 
such, you might think that they too are basically redundant, but they 
aren't: with instance methods you get the ability to override the method in 
a subclass without the caller needing to know whether they are calling the 
original method or an overridden version.

With class methods you also get the ability to override the method in a 
subclass, and again the caller doesn't need to know or care which variant 
when they call it.

Say you have a class hierarchy with a from_keys() class method. If you want 
to construct a new Foo you might call Foo.from_keys() without caring 
whether the method is the original one defined in one of Foo's base classes 
or a modified version specific to a Foo. If you were using functions then 
you would need to define a new from_keys() function for every class in a 
hierarchy, or at least for every different implementation in the hierarchy 
and the caller would need to be careful to call the correct one. So we end 
up with functions from_keys_Foo_or_Baz(cls) and from_keys_Bar() which is an 
unmaintainable mess.

-- 
Duncan Booth http://kupuguy.blogspot.com


From zondo42 at googlemail.com  Sun May  4 21:20:10 2008
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: Mon, 05 May 2008 02:20:10 +0100
Subject: Numpy not found
References: <9d1d26d4-6351-4557-9834-fd51669858df@34g2000hsf.googlegroups.com>
Message-ID: <m3wsm9im2d.fsf@googlemail.com>

adolfo <aguirre.adolfo at gmail.com> writes:

> I downloaded and installed Phyton 2.52 (it works), numpy-1.0.4.win32-
> py2.5, and scipy-0.6.0.win32-py2.5
>
> I can?t get Numpy to show up at Python?s  IDLE, or command line. If I
> do:
>
>>>>> import Numeric
> # I get
>>>>> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     import Numeric
> ImportError: No module named Numeric

Try 'import numpy' instead.  Numeric is an earlier incarnation of numpy --
it has (mostly) the same interface, but is a different package.  (Just to
confuse things even further, there's also another old one, called
numarray).

> And if I do:
>>>>> import Numeric *
> # I get
> SyntaxError: invalid syntax

The proper syntax for that is (assuming you want numpy instead) 'from numpy
import *'.

Glenn


From greg.ewing at canterbury.ac.nz  Sun May 18 07:25:45 2008
From: greg.ewing at canterbury.ac.nz (Greg Ewing)
Date: Sun, 18 May 2008 23:25:45 +1200
Subject: ANN: Pyrex 0.9.8.2
Message-ID: <mailman.1311.1211124282.12834.python-announce-list@python.org>

Pyrex 0.9.8.2 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

A block of external functions can now be declared nogil at once.

   cdef extern from "somewhere.h" nogil:
     ...

Also some minor nogil-related bugs have been fixed.


What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From thomas.karolski at googlemail.com  Thu May 22 22:28:22 2008
From: thomas.karolski at googlemail.com (thomas.karolski at googlemail.com)
Date: Thu, 22 May 2008 19:28:22 -0700 (PDT)
Subject: Decorator metaclass
Message-ID: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>

Hi,
I would like to create a Decorator metaclass, which automatically
turns a class which inherits from the "Decorator" type into a
decorator.
A decorator in this case, is simply a class which has all of its
decorator implementation inside a decorator() method. Every other
attribute access is being proxied to decorator().getParent().

Here's my attempt:
-------------------------------------------------------
from new import classobj

class DecoratorType(type):
	def __new__(cls, name, bases, dct):
		dct2 = {}
		for key, val in dct.iteritems():
			dct2[key] = val

		# create a new class which will store all of the implementation
		impl = classobj('%sImpl'%name,(),dct2)

		# update the old class to implement this implementation
		def __init__(self, *args, **dargs):
			object.__setattr__(self, '__impl', impl(*args, **dargs))
		def decorator(self):
			return object.__getattribute__(self,'__impl')
		def __getattribute__(self, attr):
			if attr=="decorator":
				return object.__getattribute__(self,'decorator')
			return getattr(object.__getattribute__(self, 'decorator')
().getParent(), attr)
		dct = {}
		dct['__init__'] = __init__
		dct['decorator'] = decorator
		dct['__getattribute__'] = __getattribute__

		return type.__new__(cls, name, bases, dct)

class Decorator(object):
	__metaclass__ = DecoratorType

class HBar(Decorator):
	def __init__(self, number):
		Decorator.__init__(self)
		self._number = number
	def inc(self):
		self._number += 1
	def p(self):
		print self._number

hbar = HBar(10)
for each in dir(hbar.decorator()):
	print each

hbar.decorator().p()
hbar.decorator().inc()
hbar.decorator().p()
-------------------------------------------------------
Unfortunately this does not work. The newly defined __init__ method
inside __new__, does a call to impl(*args, **dargs). However, since
the HBar.__init__ calls the Decorator.__init__ method, but the
HBar.__init__ method no longer resides inside HBar, but rather inside
HBarImpl (which is no longer a subtype of Decorator), the compiler
complains that Decorator.__init__ is not being called with a Decorator
instance as its first argument (which is true).
I tried changing the definition of impl inside __new__ to have
Decorator as one of its bases, but then for some reason impl(*args,
**dargs) asks for 4 arguments (just like __new__) and I have no clue
as to why that happens.

Any help on this?

Regards,
Thomas K.


From jr9445 at ATT.COM  Thu May 15 12:11:27 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Thu, 15 May 2008 11:11:27 -0500
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>

> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of globalrev
> Sent: Thursday, May 15, 2008 12:04 PM
> To: python-list at python.org
> Subject: exists=false, but no complaint when i open it!?
> 
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
> 
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()
> 
> exists returns false but when i open it doesnt complain. how come?
> 
> another file that exists returned false for complained when i tried to
> open it.
> --


You're falling victim to string interpolation because of the
backslashes.  (\n == newline, \N == N).

Try using a raw string r'filename', instead of 'filename':
	print
os.path.exists(r'C:\Users\saftarn\Desktop\NetFlixDataSet\trainingsetunzi
pped\training_set\mv_0000001.txt')


*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA621




From sjmachin at lexicon.net  Fri May  9 21:39:59 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 01:39:59 GMT
Subject: regexp help
In-Reply-To: <ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
Message-ID: <4824fcec$1@news.mel.dft.com.au>

globalrev wrote:
> ty. that was the decrypt function. i am slo writing an encrypt
> function.
> 
> def encrypt(phrase):
>     pattern =
> re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")

The inner pair of () are not necessary.

>     return pattern.sub(r"1\o\1", phrase)
> 
> doesnt work though, h becomes 1\\oh.

To be precise, "h" becomes "1\\oh", which is the same as r"1\oh". There 
is only one backslash in the result.

It's doing exactly what you told it to do: replace each consonant by
(1) the character '1'
(2) a backslash
(3) the character 'o'
(4) the consonant

> 
> 
> def encrypt(phrase):
>     pattern =
> re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
>     return pattern.sub(r"o\1", phrase)
> 
> returns oh.

It's doing exactly what you told it to do: replace each consonant by
(1) the character 'o'
(2) the consonant

> i want hoh.

So tell it to do that:
return pattern.sub(r"\1o\1", phrase)

> i dont quite get it.why cant i delimit pattern with \

Perhaps you could explain what you mean by "delimit pattern with \".



From paul at boddie.org.uk  Wed May 21 07:30:14 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 21 May 2008 04:30:14 -0700 (PDT)
Subject: Minimal Python installation?
References: <g10s8k$lgb$1@aioe.org>
Message-ID: <a45bd618-dc47-4331-b9bb-1a54db834ca0@j22g2000hsf.googlegroups.com>

On 21 Mai, 12:07, Thomas Troeger <thomas.troeger.... at siemens.com>
wrote:
>
> I'd like to put the python library and interpreter on a small embedded
> Linux x86 compatible device where disk space is an issue. I played
> around with the minimal Python interpreters, but was not entirely happy
> with them, so my question is, is there an (preferably easy) way to put
> the interpreter and a cut-down version of the python library/modules
> that ship with regular Python into a new archive that I can safely copy
> and use?

Perhaps there are some projects on the following pages which may help
in some way:

http://wiki.python.org/moin/EmbeddedPython
http://wiki.python.org/moin/Tiny_Python

[...]

> Let's say I want a complete Python install, but without all the batteries :-)

I think there's an overlap between "installer" tools and some of the
projects mentioned on the above pages, especially where retaining only
the critical libraries in the resulting distribution is concerned.

Paul


From bcb at undisclosedlocation.net  Wed May  7 19:53:42 2008
From: bcb at undisclosedlocation.net (Bruce C. Baker)
Date: Wed, 7 May 2008 18:53:42 -0500
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <5irUj.71335$y05.1766@newsfe22.lga>


<xahlee at gmail.com> wrote in message 
news:f4abdb41-be28-4628-a2ad-7fb6cea6ed65 at u12g2000prd.googlegroups.com...

[...]

(for example, Perl's naming heavily relies on unix culture (grep,
pipe, hash...), ...

"hash" + "pipe"? Ahhhhh, /no wonder/ Perl is the syntactic mishmash it is! 
;-)





From tjreedy at udel.edu  Sat May 10 20:00:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 20:00:30 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <g05cut$sjc$1@ger.gmane.org>


<wxPythoner at gmail.com> wrote in message 
news:f6743b81-9324-46dd-bbd3-ef8812e28197 at d77g2000hsb.googlegroups.com...
|I am stunned that this simple misunderstanding of mine ended in a
| mathematical clash of a sort. :)  You guys really blew me away wih
| your mathematical knowledge. And also the 0**0 is a thing I've never
| thought about trying, until now that is.

Anyone who defines a function should think about 'edge' and 'corner' cases.
Recursive definitions often help, since such cases are typically the base 
cases.
When learning a (computer) function, I often test such cases since they are 
a common place to mess up.

tjr





From __peter__ at web.de  Sun May 18 08:11:34 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 May 2008 14:11:34 +0200
Subject: Error when calling superclass __init__ method
References: <a371b239-b22f-4f8c-b34c-b0f6e061add7@24g2000hsh.googlegroups.com>
Message-ID: <g0p6dj$tg2$00$1@news.t-online.com>

Maese Fernando wrote:

> I'm getting an odd error while trying to call the __init__ method of a
> super class:
> 
> BaseField.__init__(self)
> TypeError: unbound method __init__() must be called with BaseField
> instance as first argument (got nothing instead)
> 
> 
> This is the code:

No, it isn't. Please provide the actual code or, better, a minimal
example. Don't forget to run it to verify it shows the behaviour described
above before you post it.

> What am I doing wrong?

My bets are on

BaseField.__init__() # no self

Peter


From mr.edel at gmx.at  Wed May 28 09:42:22 2008
From: mr.edel at gmx.at (Matt)
Date: Wed, 28 May 2008 13:42:22 +0000
Subject: ctypes, function pointers and a lot of trouble
Message-ID: <g1jnfq$6s9$1@aioe.org>

Hi friends,

Okay so well, I have quite a problem right now with a file stream. What 
I am doing is to use the Cannon SDK dlls to get control over my old 
Cannon A60 Camera for some surveillance useage.

By using ctypes it all worked well until now. I am able to load the 
dlls, use a lot of functions, am able to connect to the camera, read out 
some params, send commands etc... but now I am stuck with reading the 
picture data.

In C the code looks as follows (found in an supplemental *.h SDK file:

------------------------------CODE-----------------------------------------

#define cdSTDCALL __stdcall

typedef void    cdSTDCALL cdSOpen(cdContext contextH, cdPermission, 
cdError* err);
typedef void    cdSTDCALL cdSClose(cdContext contextH, cdError* err);
typedef void    cdSTDCALL cdSRead(cdContext contextH, void* buf, 
cdUInt32* bufsize, cdError* err);
typedef void    cdSTDCALL cdSWrite(cdContext contextH, const void *buf, 
cdUInt32* bufsize, cdError *err);
typedef void    cdSTDCALL cdSSeek(cdContext contextH, cdWhence, cdInt32 
offset, cdError* err);
typedef cdInt32 cdSTDCALL cdSTell(cdContext contextH, cdError* err);
typedef void    cdSTDCALL cdSProgress(cdContext contextH, cdUInt16 
percentDone, cdError* err);

/* cdStream
*/
typedef struct {
    cdContext contextH;
    /* stream I/O function pointers */
    cdSOpen*      open;
    cdSClose*      close;
    cdSRead*      read;
    cdSWrite*      write;
    cdSSeek*      seek;
    cdSTell*      tell;
} cdStream;

/* cdStgMedium
*/
typedef struct {
      cdMemType      Type;   /* Type of the medium (u). */
      union {
       cdChar*      lpszFileName;
       cdStream*   pStream;
       #ifdef   macintosh
       cdFSSpec*   pFSSpec;
       #endif
      }u;                  /* Union of all transfer medium */
} cdStgMedium;

------------------------------\CODE----------------------------------------

and this is the function definition that should give me access to the 
data stream (available via DLL):

------------------------------CODE-----------------------------------------

cdCAPI CDGetReleasedData(
           cdHSource hSource,
           cdProgressCallbackFunction * pCallbackFunc,
           cdContext Context,
           cdProgressOption ProgressOption,
           cdReleaseImageInfo* pInfo,
           cdStgMedium* pStgMedium
);

------------------------------\CODE----------------------------------------

So, since I'm no C-Professional, I can only guess what that code does. 
With some previous commands I tell the camera to make a picture. This 
picture is then automatically moved to the PCs RAM and with the function 
above (CDGetReleasedData) I should be able to access this stream. Now I 
havn't accessed any stream with ctypes yet so I have only a rough idea 
how it could work.

The following are the relevant parts of my code that don't work:

------------------------------CODE-----------------------------------------

# Definitions:

class cdReleaseImageInfo(Structure):
     _fields_ = [("SequenceID", c_uint),
                      ("DataType", c_uint),
                      ("Format", c_ubyte),
                      ("DataSize", c_uint),
                      ("Filename", c_char * 2)]


class cdStream(Structure):
     _fields_ = [("contextH", c_uint),
                      ("open", c_uint),
                      ("close", c_uint),
                      ("read", c_uint),
                      ("write", c_uint),
                      ("seek", c_uint),
                      ("tell", c_uint)]

class memunion(Union):
     _fields_ = [("lpszFileName", c_char),
                      ("pStream", cdStream)]


class cdStgMedium(Structure):
     _fields_ = [("Type", c_uint),
                      ("u", memunion)]




# command:

datainfo = cdReleaseImageInfo()
data = cdStgMedium()
errorcode = cdsdk.CDGetReleasedData(devicehandle, byref(cbfunct), 
c_uint(1), c_uint(1), byref(datainfo), byref(data))

------------------------------\CODE----------------------------------------


The function "cdsdk.CDGetReleasedData" itself gets executed correctly, 
but returns an "Invalid Parameter" errorcode. there's also no useful 
data whereas datainfo gets written correctly. I know that my cdStream 
can't work, facing the C-code, but what'd be the right cdStream class? 
What can I do? Any ideas?

Best regards and thanks,
Matt



From kyosohma at gmail.com  Fri May 23 16:47:21 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:47:21 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com> 
	<57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com>
Message-ID: <a99a78e0-8b94-46f7-a7fd-64350b617236@79g2000hsk.googlegroups.com>

On May 23, 1:44?pm, Gandalf <goldn... at gmail.com> wrote:
> you've been very helpful but still i have only one problem. I wont the
> window not to be close after clicking the X button.
> I wont the program to stay on the toolbar
>
> thanks!

Well then, in your event handler, just don't do anything.

def onClose(self, event):
    pass

or maybe you want to hide the frame?

def onClose(self, event):
    self.frame.Hide()

Just make sure you give the user some other way to close it and in
that handler, you'll need to call self.frame.Destroy().

Alternatively, you can just tell the frame not to create the "X"
button:

self.frame = wx.Frame(None, -1, title="My Frame",
style=wx.SYSTEM_MENU)

However, that makes it pretty annoying to close.

Mike


From yves at zioup.com  Fri May 23 01:29:28 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 05:29:28 GMT
Subject: serach file for regexp, return if found?
References: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>
Message-ID: <YCsZj.158482$rd2.147544@pd7urf3no>

notnorwegian at yahoo.se wrote:
> i want to search a document for a particular regexp and then store
> that regexp to a file.

> but search and match only returns matchobjects(what are those anyway?
> i dont get what to do with them, do they contain true/false,
> stringposition etc?)

> how do i do:
> for rows in file:
>     print regexp.find  ## or something equiavlent

Is this what you are trying to do:

for row in file('/etc/services'):
  if re.match('^ssh', row):
    print row


Yves.
http://www.SollerS.ca



From claird at lairds.us  Mon May 26 13:49:40 2008
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 May 2008 17:49:40 +0000
Subject: Python needn't apologize (was: Using Python for programming
	algorithms)
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<7ENXj.6906$255.106@bignews8.bellsouth.net>
	<71dc01f3-0084-4878-a4f0-5792e2648f77@y21g2000hsf.googlegroups.com>
Message-ID: <kq9rg5-n63.ln1@lairds.us>

In article <71dc01f3-0084-4878-a4f0-5792e2648f77 at y21g2000hsf.googlegroups.com>,
sturlamolden  <sturlamolden at yahoo.no> wrote:
>On May 18, 5:46 am, "inhahe" <inh... at gmail.com> wrote:
>
>> The numbers I heard are that Python is 10-100 times slower than C.
>
>Only true if you use Python as if it was a dialect of Visual Basic. If
>you use the right tool, like NumPy, Python can be fast enough. Also
>note that Python is not slower than any other language (including C)
>if the code is i/o bound. As it turns out, most code is i/o bound,
>even many scientific programs.
>
>In scientific research, CPU time is cheap and time spent programming
>is expensive. Instead of optimizing code that runs too slowly, it is
>often less expensive to use fancier hardware, like parallell
>computers. For Python, we e.g. have mpi4py which gives us access to
>MPI. It can be a good advice to write scientific software
>parallelizable from the start.
			.
		[more of same]
			.
			.
I can hardly overemphasize how often it happens not
just that Python is more than 1% as fast as C, not 
just that Python is fast enough, but that real-world
programs written in Python are FASTER then their
homologs coded in C.



From sarenius at sun3.oulu.fi  Sun May 25 15:25:26 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:25:26 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
Message-ID: <slrng3jf96.hio.sarenius@sun3.oulu.fi>

In article <mailman.1575.1211740436.12834.python-list at python.org>, Tim Golden wrote:
>so it's just possible that one of your filenames has
>a non-ascii char in it without your noticing? (Altho'
>I'd find that an odd character to include in a filename).

There is somewhere since printing worked when I changed the filename
completely.

>To get round the problem in the immediate term, change
>both print lines to something like:
>
>print repr (full_filename)

This did not work. Neither did commenting all print lines. The problem is
somewhere else.

Strange...

The bash script that copies-renames the file for dirwatch.py is here:

http://justin.yackoski.name/winp/winp

I cannot see where they put a non ascii character there. Can you?

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *



From google at mrabarnett.plus.com  Thu May  8 14:04:29 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 8 May 2008 11:04:29 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>

On May 8, 4:34 am, Yves Dorfsman <y... at zioup.com> wrote:
> Miles wrote:
> > On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
> >  >  > Is there a way to do:
> >  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> >  >  > x[0,2:6]
>
> >  >  > That would return:
> >  >  > [0, 3, 4, 5, 6]
>
> Arg... Yes, this is a typo, I meant:
> [1, 3, 4, 5, 6]
>
> >  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
>
> >  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
> >  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)
>
> Yes, exactly.
>
>
>
> >  This isn't incredibly efficient, but it does what you want (I think):
>
> >  from itertools import chain
>
> >  class multisliceable(list):
> >   def __getitem__(self, slices):
> >     if isinstance(slices, (slice, int, long)):
> >       return list.__getitem__(self, slices)
> >     else:
> >       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
> >                           else [list.__getitem__(self, s)] for s in slices]))
>
> >  p = open('/etc/passwd')
> >  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]
>
> So would it be a worthy addition to python, to add it right in the core of
> the language, and hopefully in an efficient manner ?
>
> That would certainly help some type of list comprehensions, making them more
> readable, and hopefully more readable (running split once instead of twice,
> or how many number of time you need it). The passwd example is just one
> example I ran into, but I can see running in this problem a lot with more
> complex cases. Right now I solve the passwd pb with:
>
> p = file('/etc/passwd').readlines()
> r = [ e.strip().split(':') for e in p ]
> s = [  e[0:1] + e[2:]   for e in r ]
>
> Or:
>
> p = file('/etc/passwd').readlines()
> s = [  e.strip().split(':')[0:1] + e.strip().split(':')[2:]   for e in p ]
>
> In the first case we're looping twice (two list comprehension), in the
> second case we're running the split twice on every element of p.
>
You should've read the thread entitled "Why don't generators execute
until first yield?"! :-) Michael Torrie gave the URL
http://www.dabeaz.com/generators/Generators.pdf. Your example can be
rewritten as follows:

p = file('/etc/passwd') # No need for readlines() because file's
iterator yields the lines.
r = ( e.strip().split(':') for e in p ) # A generator expression
instead of a list comprehension.
s = [  e[0:1] + e[2:]   for e in r ]


From deets at nospam.web.de  Sun May 25 07:42:59 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:42:59 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <g19q1l$pd5$01$1@news.t-online.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
Message-ID: <69t1m5F33b3ncU2@mid.uni-berlin.de>

Sebastian 'lunar' Wiesner schrieb:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> [ Diez B. Roggisch <deets at nospam.web.de> ]
>>> I finally managed to work with static files with a little hack, but it's
>>> ugly because I'm reading each static file per request.
>> How else should that work? Apache does that the same way.
> 
> I guess, Apache does some kind of memory caching for files, which are often
> requested and small enough to fit into the system memory.  May be, that's
> what the OP is referring to ...

I'm not aware of that, and I even more seriously doubt it. Because 
caching is a complicated, domain-dependend subject that would 
*immediately* cry for configuration - e.g. caching strategies and such.

And a common idiom for apache & caching is to use Squid as reverse 
proxy. Which wouldn't be the case would apache cache by itself.

Diez


From daveparker at flamingthunder.com  Thu May 29 19:11:07 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Thu, 29 May 2008 16:11:07 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org> 
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
Message-ID: <f87fa170-7b96-4c1b-8a6f-04bb5c2a2d5b@f24g2000prh.googlegroups.com>

Dan Upton wrote:
> I just think if you're shooting for an easily understandable
> language, overloading error handling requires more thought on the
> programmer's part, not less, because they have to reason about all
> outcomes

Duncan Booth wrote:
> Maybe FT should do something similar:
>    Writeline value of (set x to "hello world". Result is x.).

I like the "value of" syntax.  You guys have convinced me to
reconsider overloading the error handling.  Thank you both.


From malaclypse2 at gmail.com  Thu May  8 22:31:06 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 8 May 2008 22:31:06 -0400
Subject: anagram finder / dict mapping question
In-Reply-To: <16651e80805081930o6a240199q69dd1c3e469d45c1@mail.gmail.com>
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
	<16651e80805081930o6a240199q69dd1c3e469d45c1@mail.gmail.com>
Message-ID: <16651e80805081931i7fd43798t47bc8fe977b23a67@mail.gmail.com>

On Thu, May 8, 2008 at 7:52 PM, dave <squareswallower at 1ya2hoo3.net> wrote:
 >  I got it!  Thanks for all your help!!!  Please tell me what you think:

 Here's yet another version of the same thing, using defaultdicts and
 sets.  This way we don't have to test for membership in either the
 dictionary or the collection of anagrams.  The code is shorter, but no
 less readable in my opinion.

 from collections import defaultdict

 def anafind(words):
    """
    Given a sequence of words, return a dictionary with groups
    of letters as keys and sets of anagrams as values
    """
    anagrams = defaultdict(set)
    for word in words:
        key = ''.join(sorted(word))
        anagrams[key].add(word)
    return anagrams

 if __name__ == "__main__":
    wordlist = ['live', 'evil', 'one', 'nose', 'vile', 'neo']
    anagrams = anafind(wordlist)
    for letters, words in anagrams.items():
        print "%s: %s" % (letters, words)

 --
 Jerry


From flossy at bobbsey_twins.com  Sat May 10 23:23:53 2008
From: flossy at bobbsey_twins.com (MooJoo)
Date: Sat, 10 May 2008 20:23:53 -0700
Subject: Prettyprinting SQL statements
Message-ID: <flossy-5582CC.20235310052008@comcast.dca.giganews.com>

I'm building a Python app that will be making queries to a MySQL server 
using the MySQLdb module. The app will need to create SQL statements on 
the fly which, in addition to going to the server, will occasionally 
need to be displayed to the user. While these queries are not too 
complex, they still can be difficult to decipher without doing some 
formatting. I've done the requisite Googling to see if a library to 
format SQL can be found but, other than commericial Windows apps and 
some on-line formatters, I've not found anything remotely usable. Before 
trying to write my own parser/formatter, I was hoping somebody might 
know of a package to perform this function.

Anybody? Ferris? Anybody at all?

Thanks.


From ptmcg at austin.rr.com  Wed May 28 09:45:19 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 28 May 2008 06:45:19 -0700 (PDT)
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com> 
	<mailman.1675.1211954129.12834.python-list@python.org>
	<g1j436$6i8$02$1@news.t-online.com>
Message-ID: <c950e63c-f211-4fc9-bd72-269d9a23862b@m44g2000hsc.googlegroups.com>

On May 28, 3:11?am, Peter Otten <__pete... at web.de> wrote:
> Gary Herron wrote:
> > Alok Kumar wrote:
> >> Dear All,
>
> >> I am using dictionary for filling my xpath parsed data.
>
> >> I wanted to use in the following manner.
>
> >> mydict[index] ["key1"] ["key2"] ? ?#Can someone help me with right
> >> declaration.
>
> >> So that I can fill my XML xpath parsed data
>
> >> mydict[0] ["person"] ["setTime"] = "12:09:30"
> >> mydict[0] ["person"] ["clrTime"] = "22:09:30"
>
> [I didn't see the original post]
>
> >>> from collections import defaultdict
> >>> def make_inner():
>
> ... ? ? return defaultdict(lambda: defaultdict(make_inner))
> ...>>> mydict = make_inner()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
>
<snip>

When this has come up in previous threads, I think this was the best
solution that was proposed:


from collections import defaultdict

class recursivedefaultdict(defaultdict):
    def __init__(self):
        self.default_factory = type(self)


Here is this recursivedefaultdict in action:

data = [
    ('A','B','Z',1),
    ('A','C','Y',2),
    ('A','C','X',3),
    ('B','A','W',4),
    ('B','B','V',5),
    ('B','B','U',6),
    ('B','D','T',7),
    ]

table = recursivedefaultdict()

for k1,k2,k3,v in data:
    table[k1][k2][k3] = v

for kk in sorted(table.keys()):
    print "-",kk
    for jj in sorted(table[kk].keys()):
        print "  -",jj
        for ii in sorted(table[kk][jj].keys()):
            print "    -",ii,table[kk][jj][ii]

Prints:

- A
  - B
    - Z 1
  - C
    - X 3
    - Y 2
- B
  - A
    - W 4
  - B
    - U 6
    - V 5
  - D
    - T 7

-- Paul



From n00m at narod.ru  Mon May  5 07:34:18 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 04:34:18 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
	<fvmov5$o4i$00$1@news.t-online.com>
Message-ID: <95445d33-218f-42de-9412-067229c20830@d45g2000hsc.googlegroups.com>

actually, it's this doesn't work (again, in VBS the "same"
construction works properly):

f = os.popen('osql -E -S(local) -dpubs -w800 -Q"' + query + '"', 'r')

res=f.readlines()

=======
here "query" is a multiline string like:

select getdate()

    select 555*666

select getdate()


From larzluv at hotmail.com  Mon May 12 02:34:08 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 23:34:08 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
Message-ID: <2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>

On May 11, 11:42 pm, Larry Hale <larz... at hotmail.com> wrote:
> THANKS, AGAIN, for the reply!  :)
>
> Okay, now I -really- feel silly...  :>
>
> So, when I was going to try what you'd suggested, I noticed something
> peculiar: I hadn't "changed" anything on my system, but now, when I
> tried to "import magic" I got a missing DLL error.  For a DIFFERENT
> DLL!  This got me to thinking...
>
> Turns out, when I was having "success" earlier, I was -in- the C:
> \Program Files\GnuWin32\bin directory (where file.exe and related .dll
> files are).
>
> So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
> PATH.  Everything worked.  I removed all the copious copies of the
> DLL, the magic files, etc., littering my hard drive in every other
> location.  Still worked.
>
> 'Course, I don't honestly know why it didn't work with the files
> copied to other locales contained in the sys/Py paths... perhaps it
> was, as you mentioned, wanting the tree-structure to be the same?  (I
> haven't the heart to check this out fully right now... *maybe* at a
> later time...  ;) )
>
> Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
> THAT... you know, all the "obvious"/"I've been programming/working in
> computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
> 'hacker'..." stuff.  I -swear-!
>
> [EGG ON FACE]
>
> [SIGH]  Well, I'd say "live and learn", but I'm still scratching my
> head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
> off to work _with_ the module now, then work-up my HowTo (and
> experiment with making an "egg"?? ;) )...
>
> Caio!
> -Larry  :P  :)
>
> On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
>
> > Larry Hale wrote:
> > > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > > file... still no-go.  :/
>
> > It's often the custom of programs ported from unix to windows to use the
> > dll location as a key to find the other files that are typically in
> > share, or etc.  GTK, for example uses ../share and ../etc from the
> > location where the dlls are stored (if the dlls are in a folder called bin).
>
> > In this case I'd try making a folder in the Python25 folder called
> > "share" and put the contents of the gnuwin32 share/file stuff in there.
> >  Should look something like this:
>
> > c:/python25/share/file/magic.mime.mgc
> > c:/python25/share/file/magic
> > c:/python25/share/file/magic.mgc
> > c:/python25/share/file/magic.mime
>
> > Or, judging by a string I found in the dll itself, you might have to put
> > the files here:
>
> > c:/progra~1/File/share/file/magic
>
> > Although if such a path really is hardcoded into the dll, this is
> > certainly a bug, since it will fail on certain non-english windows systems.
>
> > Anyway, who knows.  Give these options a try.



UPDATE: HOORAY!!!  Well, actually, was about two steps forward, one
back.  But I've gotten it all sorted out now!  :)

I added C:\Program Files\GnuWin32\bin to the system/Windows PATH.
This takes care of the various required DLLs/libs.

The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
has the man pages.  I'd overlooked these as they were only modified as
necessary; the "BSD" part made me think they'd be the same as the same
online versions I'd already read (that were *nix specific).
Obviously, I was wrong.  These had the default paths to the magic*
files listed; C:\Program Files\File\share\file\.

If one creates said directory structure and moves/copies/unpacks the
magic ("database") files THERE, then one may do:

    >>> import magic
    >>> test = magic.Magic() # <-- New Magic class instance
    >>> test.from_file( 'C:\\startrek.exe' ) # <-- Yeah, I have an old
Star Trek game file here to test with...  :)
    'MS-DOS executable, MZ for MS-DOS'  # <-- This is what's
returned...

Alternately, if one wishes to leave/place the magic files elsewhere,
do like:

    >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
\share\\file\\magic' ) # <-- spec where/what the file is

NOTE: Even if the "magic_file" location *is* specified, "mime = True"
still works fine.  (Haven't checked, but I presume the source simply
tacks ".mime" to the filename automagically.)  Obviously/also, one
needn't specify the argument names if one uses proper argument order:
magic.Magic( mime, magic_file )  :)


THANKS SO MUCH, Michael, for your answers and helping me alone the
way...  :)


Cheers,
-Larry


From martin at v.loewis.de  Sat May 10 15:23:24 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 21:23:24 +0200
Subject: Is there a PyPI API?
In-Reply-To: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>
References: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>
Message-ID: <4825F62C.9050407@v.loewis.de>

> I just can't figure out how to get the metadata, I guess.

See

http://wiki.python.org/moin/PyPiXmlRpc

Regards,
Martin


From mwolffedu at gmail.com  Fri May 16 16:16:24 2008
From: mwolffedu at gmail.com (lampshade)
Date: Fri, 16 May 2008 13:16:24 -0700 (PDT)
Subject: Arch problems--how do I build PIL to be 64 bit so it plays nicely on 
	OS X?
Message-ID: <d94878c8-3ea1-4da0-9515-9a8aa7f8210e@x41g2000hsb.googlegroups.com>

Hello,

I'm using python + django to do some web design and I would really
like to use the python image library as part of this.  There seems to
be a problem, however, with apache and mod_python being 64 bit while
my python image library(PIL) is only 32 bit.

Does anyone have experience with building the correct architectures so
that OS X 10.5 plays nicely?  I think, when it comes down to it, I
just need PIL at this point to be x86_64 so that it plays with apache
and mod_python.

Any advice, hand-holding, or sage wisdom?


From marlin_rowley at hotmail.com  Fri May 16 19:21:37 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:21:37 -0500
Subject: Rearranging elements (cont..)
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W39883617665A699328FB649FC80@phx.gbl>

All:
 
Say I have an array:
 
a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
 
How do I make it so that I now have:
 
starting with first element (a[0])
new_arr[0] = 'r'
new_arr[1] = 'g'
new_arr[2] = 'b'
new_arr[3] = 'a'
new_arr[4] = 'r'
.....
 
continuing "through" a[1] with the same new_arr
new_arr[N] = 'r'
new_arr[N+1] = 'g'
....
 
-M
 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From badmuthahubbard at gmail.com  Tue May 20 09:19:17 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 20 May 2008 16:19:17 +0300
Subject: What is wrong with my Python threading?
Message-ID: <8200bab70805200619o21f8b971ob6d3bb359f9080aa@mail.gmail.com>

#!/usr/bin/python

#why doesn't this run both threads simultaneously?
#Thanks for any help.
#Chuckk

import threading
import time

def printesc(thrd):
    for i in range(10):
        time.sleep(1)
        print thrd, i

def master():
    thd1 = threading.Thread(target=printesc, args=(1,))
    thd2 = threading.Thread(target=printesc, args=(2,))
    thd1.run()
    thd2.run()

master()


From gagsl-py2 at yahoo.com.ar  Tue May 27 22:08:07 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 23:08:07 -0300
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
Message-ID: <op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 14:43:52 -0300, Ian Kelly <ian.g.kelly at gmail.com>  
escribi?:

> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

filter returns a newly created list, so this code is as wasteful as a list  
comprehension (and harder to read).

-- 
Gabriel Genellina



From castironpi at gmail.com  Wed May 14 14:07:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:07:37 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>
Message-ID: <4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com>

On May 14, 1:06?pm, castiro... at gmail.com wrote:
> On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > you can safely ignore its posts.
>
> > > > > > > How does it generate text?
>
> > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > However you know what would be helpful? ?If I could go to the right
> > > > > place to start the ring.
>
> > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > I'd stay on mutability for the world domination factor. ?Fluent
> > > currency is buoyant currency; turn on a local clock, and someone gets
> > > some cubic verticals.
>
> > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > can pretty well win work.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have a self-referential on Pygame: it's a Hand Tool object.
> > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > - Show quoted text -
>
> If Python can plot in to chess, and Tron rings live, then why not
> group it knew?- Hide quoted text -
>
> - Show quoted text -

That would be know.  Plot and split in too.


From dickinsm at gmail.com  Thu May 22 11:23:43 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 08:23:43 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com> 
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com> 
	<g13d7u$5gn$1@rumours.uwaterloo.ca>
Message-ID: <0afa8161-cc8e-4f2a-b4fb-7f2cea997fb7@59g2000hsb.googlegroups.com>

On May 22, 5:09?am, Ross Ridge <rri... at caffeine.csclub.uwaterloo.ca>
wrote:
> Henrique Dante de Almeida ?<hda... at gmail.com> wrote:
>
> > Finally (and the answer is obvious). 387 breaks the standards and
> >doesn't use IEEE double precision when requested to do so.
>
> Actually, the 80387 and the '87 FPU in all other IA-32 processors
> do use IEEE 745 double-precision arithmetic when requested to do so.
> The problem is that GCC doesn't request that it do so. ?It's a long
> standing problem with GCC that will probably never be fixed. ?You can
> work around this problem the way the Microsoft C/C++ compiler does
> by requesting that the FPU always use double-precision arithmetic.

Even this isn't a perfect solution, though: for one thing, you can
only
change the precision used for rounding, but not the exponent range,
which remains the same as for extended precision.  Which means you
still don't get strict IEEE 754 compliance when working with very
large or very small numbers.  In practice, I guess it's fairly
easy to avoid the extremes of the exponent range, so this seems like
a workable fix.

More seriously, it looks as though libm (and hence the Python
math module) might need the extended precision: on my machine
there's a line in /usr/include/fpu_control.h that says

#define _FPU_EXTENDED 0x300     /* libm requires double extended
precision.  */

Mark


From benjamin.fremiot at gmail.com  Mon May 12 09:13:25 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 06:13:25 -0700 (PDT)
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
	<48282e92$0$14346$e4fe514c@news.xs4all.nl>
Message-ID: <ea288f51-f765-4086-9541-7aae9faa1ae6@24g2000hsh.googlegroups.com>

On May 12, 1:48?pm, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:
> Gruik wrote:
> > But before that 1 question: what if I'm in Python ?
> > Following your solution, I did that in Python :
>
> > ? ? def load_buffer(buffer) :
> > ? ? ? ? compiled_buffer = compile(buffer, "module_name", "exec")
> > ? ? ? ? exec(compiled_buffer)
>
> > It works great except that I can't have a module object and that it is
> > as if I did "from module import *"
> > But I need the module object and not an "import *" behavior.
> > Any idea about the way to do that?
>
> Something along the lines of:
>
> import new
> mymodule = new.module("mymodule")
> exec <<<code>>> in mymodule.__dict__
>
> --irmen

Yeah it works !

    exec(compiled_module, globals(), mymodule.__dict__)

Just to add mymodule to sys.modules and it's good!

Thanks again
Benjamin


From wxPythoner at gmail.com  Thu May  8 18:54:42 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Thu, 8 May 2008 15:54:42 -0700 (PDT)
Subject: Mathematics in Python are not correct
Message-ID: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>

Have a look at this:

>>> -123**0
-1


The result is not correct, because every number (positive or negative)
raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).

The problem is that Python parses -123**0 as -(123**0), not as
(-123)**0.

I suggest making the Python parser omit the negative sign if a
negative number is raised to the power of 0. That way the result will
always be a positive 1, which is the mathematically correct result.

This is a rare case when the parser is fooled, but it must be fixed in
order to produce the correct mathematical result.


From ivan.illarionov at gmail.com  Sat May  3 20:08:17 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 4 May 2008 00:08:17 +0000 (UTC)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
	<fvitsq$15ti$3@news.mtu.ru>
	<d2dca1d3-9a41-4862-a695-ba2fbf93e6a6@h1g2000prh.googlegroups.com>
Message-ID: <fviuph$17k7$1@news.mtu.ru>

On Sat, 03 May 2008 17:01:44 -0700, darkblueB wrote:

> On May 3, 4:52?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> Try run 'python setup.py build_ext -f' to force setup.py to rebuild
>> everything with JPEG. And 'sudo python setup.py install' should install
>> PIL with JPEG support.
> 
> yes, that works
> 
> (the self test still gives misleading results ?) but running some sample
> program works fine
> 
> thanks

You're welcome. To make self test inside source directory work you 
probably should rebuild it inplace too.
python setup.py build_ext -f -i


From gagsl-py2 at yahoo.com.ar  Tue May 27 11:32:26 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 12:32:26 -0300
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
Message-ID: <op.ubtj4ck4x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 02:43:53 -0300, sebastian.noack at googlemail.com  
<sebastian.noack at googlemail.com> escribi?:

> On May 27, 2:17 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> It's not a bug, you must extract the StringIO contents *after* closing
>> tar_file, else you won't get the last blocks pending to be written.
>
> I looked at tarfile's source code last night after I wrote this
> message and figured it out. But the problem is that TarFile's close
> method closes the underlying file object after the last block is
> written and when you close StringIO you can not get its content
> anymore. Wtf does it close the underlying file? There is absolute no
> reason for doing this. Are you still sure this isn't a bug?

Ouch, sorry, I only tried with gzip (and worked fine), not bz2 (which is  
buggy).

-- 
Gabriel Genellina



From hdante at gmail.com  Tue May  6 14:00:16 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 11:00:16 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com> 
	<2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com>
Message-ID: <2523ca17-c534-44b9-8db7-543a794dc213@e39g2000hsf.googlegroups.com>

On May 6, 12:28?am, castiro... at gmail.com wrote:
>
> There's a process decorator to functions in a module.
>
> [supposes]
>
> @process
> def datafile( processdict ):
> ? ?processdict.modify( )
> ? ?op= yield
> ? ?op.call( ) in processdict
> ? ?# op.call( ) in namespace
>
> More simply:
>
> @process
> def datafile( processdict ):
> ? ?processdict.modify( )
> ? ?interaction_object= yield
> ? ?invoke( interaction_object, processdict )
> ? ?#or interaction_object.invoke( **processdict )
> ? ?processdict.commit( )
>
> Making each execution of process a self-modifying disk file.
> Interaction_object could be binary or text. ?If text, we'd have a
> cross-language executable, but I'm suspicious it wouldn't be vacuous
> as a Python of Python composition: would other languages pass other
> than Python programs?
>
> I think relational databases are the only in there. ?In other words, I
> think Python would make a wholly better stored procedure and query
> language than those of databases. ?Certainly I'm suspicious that's
> naivete speaking up; I question, would it? ?Is there more risk of or
> opportunity for malicious execution? ?Simply put, can we get
> primitives in to databases? ?What's an example of a [optionally real]
> operation on the primitives that doesn't map pretty well into SQL?
> How do you want to write base-case scenarios if they're going to be
> literals?

 Datafiles could be implemented with SQL. Consider SQL:

 SELECT * FROM process_dict where id = 1
 .
 SELECT * FROM process_dict where id = 1

 Obviously, this is all a supposition, I'm not claiming the code is
perfect (or am I ?). If datafiles could be implemented with SQL and
storing text requires datafiles, then I can store text with datafiles
(haha !). Would you consider doing this ? One could even store python
decorated serialized code using SQL [supposition]. But would it be
useful [haha !] ?

 I don't know.


From littlesweetmelon at gmail.com  Fri May 16 04:46:40 2008
From: littlesweetmelon at gmail.com (=?GB2312?B?zPC5zw==?=)
Date: Fri, 16 May 2008 16:46:40 +0800
Subject: Instance of class "object"
Message-ID: <cdb837ea0805160146vff6290fid5db21a82deb47b3@mail.gmail.com>

Howdy,
    I wonder why below does not work.

a = object()
a.b = 1        # dynamic bind attribute failed...

To make it correct, we have to create a new class:
class MyClass(object): pass
a = MyClass()
a.b = 1       # OK

Does this strange behavior break the LSP (Liskov substitution principle)?

    Regards,
--
ShenLei


From wuwei23 at gmail.com  Tue May 27 04:15:40 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 01:15:40 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
Message-ID: <31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com>

On May 27, 5:47 pm, Sverker Nilsson <s... at sncs.se> wrote:
> Dont make they functions. Or is this just to throw us out?

Have you even bothered to read the reasoning for this change since the
last time you got your knickers twisted over it?

http://www.python.org/dev/peps/pep-3105/#rationale

I don't see "piss everyone off" listed there anywhere.

Personally, I believe if you're writing code of any serious length,
you generally shouldn't be using 'print' anyway, using the logging
module allows for a lot more flexibility.

If you're bothered by having to type the parentheses while in the
interpreter, try using IPython with it's autocall mode turned on.


From daveparker at flamingthunder.com  Wed May 21 15:34:36 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 12:34:36 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com>
Message-ID: <afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com>

On May 21, 1:14?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> I wonder whether "is" could be used both for "x is value" and "x is a
> type" without causing a problem:
>
> If command is a string ...
>
> If command is "quit" ...

I think you are right.  I like "If command is "quit" ...".  For a user
who wasn't mathemetically inclined and was doing mainly string
manipulation, I think it might be easier to read than the equivalent
"If command = "quit" ...".  By making them exactly equivalent, I can't
think of any confusion that might induce bugs.  If you think of any
drawbacks, please let me know.  Otherwise, I'll put it in the next
time I update the parser (probably this weekend).  Thank you again for
your suggestions.


From giraffeboy at gmail.com  Wed May 21 09:22:02 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 06:22:02 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
Message-ID: <4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>

On May 21, 1:49 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:

> Did you remember to commit your changes before re-running the report?
> Python's DB API requires that any auto-commit feature of the
> underlying database be turned off by default, so you are required to
> commit changes yourself.  If you're used to having auto-commit turned
> on, this can be confusing.

I did and I confirmed this by modifying the data, selecting it from
the mysql command line client to verify the changes, then running the
report again. If I exit the application and then start it again,
everything works as expected until the second instance of the report
is run. I have a feeling it has something to do with there already
being an instance of the report class, but I can't work out how to
destroy it and aren't really sure how to remove the references to it
either. I added a print statement to the code and it displays a row
that doesn't exist any more. Code, output of print statement and
result from the mysql client shown below.

Andrew


Code:
#Get all the mileages and add them together for the month:
curs.execute('SELECT date, mileage, name FROM mileage, agents WHERE
mileage.agent = agent.rowid AND date >= CAST(%s AS DATE) AND date <
CAST(%s AS DATE) AND mileage.agent=%s ORDER BY date', (fromdate,
todate, agentid))
for row in curs:
   month = str(row[0])[:7]
   print row[1], month

Output:
100.0 2008-03

MySQL Output just prior to running the report:
mysql> select * from mileage;
+-------+------------+---------+---------+-------+
| rowid | date       | mileage | vehicle | agent |
+-------+------------+---------+---------+-------+
|     1 | 2008-04-28 |  875.63 |       3 | 3     |
|     2 | 2008-04-28 | 1188.13 |       6 | 6     |
|     3 | 2008-04-28 |  676.88 |       4 | 4     |
|     4 | 2008-04-21 | 1111.25 |       6 | 6     |
|     5 | 2008-04-21 | 1126.88 |       3 | 3     |
|     6 | 2008-04-28 | 1029.38 |       7 | 8     |
|     7 | 2008-04-21 |  953.13 |       7 | 8     |
|     8 | 2008-04-21 |  675.63 |       4 | 4     |
|     9 | 2008-04-14 |  891.88 |       3 | 3     |
+-------+------------+---------+---------+-------+
9 rows in set (0.00 sec)

As you can see there's no row with a mileage of 100 with the correct
month.


From terry.yinzhe at gmail.com  Sun May 18 19:42:05 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 16:42:05 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
	<69b0mlF31f0kbU1@mid.uni-berlin.de>
Message-ID: <507f43ce-1513-490b-b4a3-6c501e1a0169@v26g2000prm.googlegroups.com>

On May 18, 11:35 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Terry schrieb:
>
>
>
> > On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> >> escribi?:
>
> >>> Is there a simple way to get all the instances of one class? I mean
> >>> without any additional change to the class.
> >> Try with gc.get_referrers()
>
> >> py> import gc
> >> py> class A(object): pass
> >> ...
> >> py> a,b,c = A(),A(),A()
> >> py> A
> >> <class __main__.A at 0x00A3F4E0>
> >> py> for item in gc.get_referrers(A): print type(item)
> >> ...
> >> <type 'getset_descriptor'>
> >> <type 'getset_descriptor'>
> >> <type 'tuple'>
> >> <class '__main__.A'>
> >> <class '__main__.A'>
> >> <class '__main__.A'>
> >> <type 'dict'>
> >> <type 'dict'>
>
> >> We need to filter that list, keeping only A's instances:
>
> >> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> >> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> >> <__main__.A object at 0x00A40E18>]
>
> >> --
> >> Gabriel Genellina
>
> > But I saw in the help that we should "Avoid using get_referrers() for
> > any purpose other than debugging. "
>
> Yes, because using it do is very resource-consuming and shouldn't be
> done. Why don't you tell us what you are after here & then we might come
> up with a better solution?
>
> Diez

I'm developing a message/state_machine based python program (I'm not
using stackless, plan to move to it later).
I want to collect all the state_machines (threads) and send them
'tick' message or 'quit' message.

Now I'm using a static member to collect the machines, just wonderring
if python already provide something like this.


From deets at nospam.web.de  Mon May  5 11:25:14 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 17:25:14 +0200
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
	<mailman.593.1210000345.12834.python-list@python.org>
Message-ID: <688n7kF2onffkU1@mid.uni-berlin.de>

> directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
> os.path.join(directory)
> 
> Then python can worry about the gritty details, and you don't have to.

Or somewhat neater IMHO:

 
os.path.join('C:','Python25','myPrograms','pygameProgs','dront.mp3')

Diez


From exarkun at divmod.com  Wed May 14 06:20:05 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 06:20:05 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <575bc914-c702-42c1-a6e5-e911e68187b9@c65g2000hsa.googlegroups.com>
Message-ID: <20080514102005.6859.835877135.divmod.quotient.63329@ohm>

On Tue, 13 May 2008 18:20:29 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 14 Mag, 02:56, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
>> Why?  Isn't this why subtraction exists?  If there is a call scheduled to
>> happen at T1 and the current time is T2, then I know that after (T1 - T2)
>> elapses, it will be time to run the call.  Why do I have to do any checks
>> at all?  I just tell select() to wait that long.  Presumably this is just
>> what someone will do if they want to use asyncore with timed calls.  Call
>> asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.
>
>That doesn't work if I decide to schedule one or more calls AFTER the
>loop has started (see: "I already told select what timeout use").
>As far as I've understood by reading the Twisted core what happens is
>that there's a heap of scheduled calls and a loop that keeps calling
>time.time() to check the scheduled functions due to expire soonest.
>I've also proposed a patch for asyncore using the same approach:
>http://bugs.python.org/issue1641

This isn't how it works.  You're misreading the Twisted implementation.  I
don't know how to explain it any more clearly.

Jean-Paul


From regnarg at seznam.cz  Sun May 11 09:17:35 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Sun, 11 May 2008 15:17:35 +0200
Subject: Make Python create a tuple with one element in a clean way
In-Reply-To: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <20080511131735.GA31145@sirius>

Hello,

> so it would be clean if Python would convert anything put into ( ) to
> be a tuple, even if just one value was put in (without having to use
> that ugly looking comma with no value after it).

if it worked that way, it will absolutely mess up Python syntax, because
we mathematicians are used to use parentheses to force explicit operator
precedence, to group expressions, etc.

Should (1+1)*2 yield 4 or (2,2) ?



From ivlenin at gmail.com  Sun May 25 19:30:49 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 23:30:49 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
Message-ID: <JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>

On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> i meant like set[pos], not iterate but access a specific position in the
> set.

If you need to access arbitrary elements, use a list instead of a set 
(but you'll get slower inserts). OTOH, if you just need to be able to get 
the next item from the set, you can use an iterator:

> now i have to do:
> s = toSet.pop()
> toSet.add(s)

i = iter(toSet)

s = i.next()

> if i want to get the url of the next item in a set, how would i do that?
> i can do this with a list:
> 
> def scrapeSitesX(startAddress, toList, listPos): return
> scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> list.
> i can work around that but it doesnt get as elegant.

Do you have to use recursion here? Why not:

for site in toList:
	scrape(site)


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:56:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:56:12 -0300
Subject: Custom Classes?
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
Message-ID: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi  
<victorsubervi at gmail.com> escribi?:

> Okay, trying this again with everything working and no ValueError or any
> other errors, here we go:

> getpic = "getpic" + str(w) + ".py"

Why do you *generate* the getpicNN.py? It contains always the same code,  
why don't you just use a single getpic.py?

> and then surf to:
> http://whatever.url/getpic20.py?id=6&x=1

Why don't you post the error you get instead...? Including the complete  
exception report.

> Also, please re-send the link on how to post good questions to the list.  
> I cannot find it.

Uhm, I don't think there is something specific for this list. There is an  
article from E.S.Raymond "How to ask questions the smart way?" that you  
can find with Google

-- 
Gabriel Genellina



From maxerickson at gmail.com  Mon May 12 09:23:13 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 12 May 2008 13:23:13 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
Message-ID: <Xns9A9C5F7F931E8maxericksongmailcom@80.91.229.13>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> On May 12, 1:30?pm, John Machin <sjmac... at lexicon.net> wrote:
>> Duncan Booth wrote:
> [...]
>> > I think the variant I came up with is a bit clearer:
>>
>> > for i in range(1,101):
>> > ? ?print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else
>> > 'Buzz') or 
>  i
>>
>> More than a bit clearer, IMO. How about
>> ? ? ?print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or
>> i (or perhaps
>> ? ? ?print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz'))
>> or i to save looking up the precedence rules) ?
> 
> Stuff clarity!  How about
> 
> for i in xrange(1, 101):
>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i
> 
> --
> Arnaud
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

With no loop:

i=1
exec"print'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)]or i;i+=1;"*100


max



From kuratkull at kuratkull.com  Mon May 19 05:54:14 2008
From: kuratkull at kuratkull.com (kuratkull at kuratkull.com)
Date: Mon, 19 May 2008 02:54:14 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
Message-ID: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>

Hello,

***************
import urllib2
import re
import string
import sys

url = "http://www.macgyver.com/"
request = urllib2.Request(url)
opener = urllib2.build_opener()
html = opener.open(request).read()

match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)

out = match.findall(html)

print out
**************

I would like to print out string with formatting, but as I read, the
string is made into a raw string when using re.
How could I disable or bypass this?

I googled for an hour and couldn't find a solution.

Thank you in advance.




From Randy.Galbraith at gmail.com  Sat May 10 23:41:00 2008
From: Randy.Galbraith at gmail.com (Randy Galbraith)
Date: Sat, 10 May 2008 20:41:00 -0700 (PDT)
Subject: Compiling Python 2.5.2 on AIX 5.2
References: <0b73e8e5-c301-4823-ac94-42f757456cf1@x19g2000prg.googlegroups.com>
	<mailman.402.1208181700.17997.python-list@python.org>
	<d72454cc-256d-4e24-ae2b-b87dd77c9e0d@c19g2000prf.googlegroups.com>
	<48059DA9.5080900@v.loewis.de>
	<c55ebac2-093c-4639-8fd4-c54df2ecf480@k1g2000prb.googlegroups.com>
	<480c2364$0$26788$9b622d9e@news.freenet.de>
	<e05d2418-89b5-4864-a46b-e27341ec84d9@26g2000hsk.googlegroups.com>
	<480e2bbc$0$24477$9b622d9e@news.freenet.de>
Message-ID: <9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>

On Apr 22, 11:17 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > test test_mmap crashed -- <type 'exceptions.EnvironmentError'>: [Errno
> > 22] Invalid argument
>
> You should run this with -v. This is too little detail to know what
> exactly failed.

Sorry it took so long to get back to you.  At this point, I'm going to
attempt to use python on AIX 5.2 even with the mmap and wait4
failures.  My main requirement running Mercurial SCM, so hopefully the
python binary I have will do the job.

Nonetheless, I wanted to quickly dump out the expanded results you
suggested might help.

Running this:
./python Lib/test/test_mmap.py -v

Resulted in this:
--results--
<type 'mmap.mmap'>
  Position of foo: 1.0 pages
  Length of file: 2.0 pages
  Contents of byte 0: '\x00'
  Contents of first 3 bytes: '\x00\x00\x00'

  Modifying file's content...
  Contents of byte 0: '3'
  Contents of first 3 bytes: '3\x00\x00'
  Contents of second page: '\x00foobar\x00'
  Regex match on mmap (page start, length of match): 1.0 6
  Seek to zeroth byte
  Seek to 42nd byte
  Seek to last byte
  Try to seek to negative position...
  Try to seek beyond end of mmap...
  Try to seek to negative position...
  Attempting resize()
  Creating 10 byte test data file.
  Opening mmap with access=ACCESS_READ
  Ensuring that readonly mmap can't be slice assigned.
  Ensuring that readonly mmap can't be item assigned.
  Ensuring that readonly mmap can't be write() to.
  Ensuring that readonly mmap can't be write_byte() to.
  Ensuring that readonly mmap can't be resized.
  Opening mmap with size too big
  Opening mmap with access=ACCESS_WRITE
  Modifying write-through memory map.
  Opening mmap with access=ACCESS_COPY
  Modifying copy-on-write memory map.
Traceback (most recent call last):
  File "Lib/test/test_mmap.py", line 393, in <module>
    test_both()
  File "Lib/test/test_mmap.py", line 247, in test_both
    m.flush()
EnvironmentError: [Errno 22] Invalid argument
--end results--

btw I'm not sure if -v was required in this direct run.  Running w/o -
v gave the same results.

Now, over to wait4.  Your comment was:

> That suggests a bug in wait4: apparently, it fails to correctly return
> the PID. Could be an OS bug, but more likely, it's a type problem in
> Modules/posixmodule.c.

Running this:
./python Lib/test/test_wait4.py

Resulted in this:
--results--
test_wait (__main__.Wait4Test) ... FAIL

======================================================================
FAIL: test_wait (__main__.Wait4Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/..<snip>../Python-2.5.2/Lib/test/fork_wait.py", line 75, in
test_wait
    self.wait_impl(cpid)
  File "Lib/test/test_wait4.py", line 28, in wait_impl
    self.assertEqual(spid, cpid)
AssertionError: 0 != 8417358

----------------------------------------------------------------------
Ran 1 test in 12.066s

FAILED (failures=1)
Traceback (most recent call last):
  File "Lib/test/test_wait4.py", line 37, in <module>
    test_main()
  File "Lib/test/test_wait4.py", line 33, in test_main
    run_unittest(Wait4Test)
  File "/..<snip>../Python-2.5.2/Lib/test/test_support.py", line 451,
in run_unittest
    run_suite(suite, testclass)
  File "/..<snip>../Python-2.5.2/Lib/test/test_support.py", line 436,
in run_suite
    raise TestFailed(err)
test.test_support.TestFailed: Traceback (most recent call last):
  File "/..<snip>../Python-2.5.2/Lib/test/fork_wait.py", line 75, in
test_wait
    self.wait_impl(cpid)
  File "Lib/test/test_wait4.py", line 28, in wait_impl
    self.assertEqual(spid, cpid)
AssertionError: 0 != 8417358
--end results--

Thanks for taking your time to respond.  It is truly appreciated at
this end.

Kind regards,
-Randy Galbraith


From jeffober at gmail.com  Thu May  1 15:31:20 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 12:31:20 -0700 (PDT)
Subject: data manipulation
References: <083cef9c-6bfe-4a1f-afc0-7384c043dc6d@u12g2000prd.googlegroups.com>
Message-ID: <6cb58c7d-33cb-4969-a8f5-55d285688306@k37g2000hsf.googlegroups.com>

The function expects an excel file.  It cannot read a plain text
file.  You would need to figure out a way to convert the text file
data into an excel format and save it to a new file first.

The proper way to handle this is to make your data processing
functions expect a defined format.  Then, you write importer functions
for various types of files that convert the data in each file to the
defined format.  That way, you can support various file formats and
reuse your processing functions on all of them.


From aspersieman at gmail.com  Thu May  8 08:53:10 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:53:10 +0200
Subject: Parsing Email 'References' header.
Message-ID: <4822F7B6.2000403@gmail.com>

Hi

I have a python script that parses email headers to extract information 
from them. I need to get the _last_ messageid in the 'References' field 
(http://cr.yp.to/immhf/thread.html) to create a threaded view of these 
emails (these messageid's are stored in a database).

Now, I can easily access the 'References' field using the python 'email' 
module, but I need a regular expression to get the last messageid in the 
'References' field.

Here's what I have so far:
<code>
rx_lastmesgid = re.compile(r"(<.+>$)")
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) # 
parentid's value is 
eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
</code>

I need it to return "<5 at mail.gmail.com>"

Can anyone help?

Thanks

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From andre.roberge at gmail.com  Sat May 24 09:22:27 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Sat, 24 May 2008 06:22:27 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>

On May 24, 10:12 am, Roy Smith <r... at panix.com> wrote:
> In article
> <84ff733a-e364-437d-9b5d-d8bb14cc6... at m73g2000hsh.googlegroups.com>,
>  John Roth <johnro... at gmail.com> wrote:
>
> > > Does the following patch has a chance of being introduced in the
> > > standard python distribution?
>
> > I certainly hope not!
>
> I think you're being overly negative here.  Antoon went to the trouble to
> read the sources and post a diff.  At the very least, he deserves a more
> polite response.
>
> But, more than that, I think Antoon's idea has some merit.  I understand
> that the mantra in unit testing is that the tests should be able to be run
> in any order.  Still, it's the job of a library package to make it easy to
> do things, not to enforce policy.  If somebody (for whatever reason) has a
> need to run their tests in a certain order, why is it our job to make it
> hard for them to do that?
>
> In fact, unittest.defaultTestLoader *already* sorts the tests into
> alphabetical order by their name.  So, if somebody wanted to get the tests
> run in order, they could just name their tests "test0001", "test0002", etc.
> In fact, I've done that in the past when I had some (long forgotten) reason
> why I wanted to run a bunch of things in order.  Allowing the tests to be
> sorted by line number order instead of by name just makes it a little
> easier to do the same thing.
>
> If somebody wants that functionality, and is willing to put in the effort
> to write the code to do it, and contribute that back to the community, I
> don't see any reason why it shouldn't be considered.  It would have to be
> done in a way that doesn't change the current behavior (perhaps by shipping
> a subclass of TestLoader which users could use instead of the default).
> I'm not saying that we *need* to include it, just that it's not such a bad
> idea that it deserves responses like "I certainly hope not!"

I totally agree.

I can't relate to anyone that want to oppose a change that would give
more freedom to a programmer.

Andr?


From lists at cheimes.de  Tue May  6 18:54:25 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 00:54:25 +0200
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <4820E1A1.6050406@cheimes.de>

Michael Robertson schrieb:
> I'm having trouble opening a file in linux, whose path has spaces in it.
> 
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
> 
>>>> open('./my test/test.txt')
> Exception

Works for me

>>> open('./my test/test.txt')
<open file './my test/test.txt', mode 'r' at 0xb7dd6a40>

Christian



From bignose+hates-spam at benfinney.id.au  Thu May 15 06:04:16 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 20:04:16 +1000
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
	<482be615$0$10798$426a34cc@news.free.fr>
Message-ID: <87zlqrx4rj.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> May we agree to disagree here - unless we don't ?

Absolutely not, except where not applicable.

-- 
 \       "I always wanted to be somebody. I see now that I should have |
  `\                              been more specific."  -- Lily Tomlin |
_o__)                                                                  |
Ben Finney


From szrRE at szromanMO.comVE  Sat May 31 14:36:54 2008
From: szrRE at szromanMO.comVE (szr)
Date: Sat, 31 May 2008 11:36:54 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
	<kjv2441a9im6bcistqcav6c87j4024s2pj@4ax.com>
Message-ID: <g1s5s7019mo@news4.newsguy.com>

J?rgen Exner wrote:
> "szr" <szrRE at szromanMO.comVE> wrote:
>> I would rather have the OP comment about that, as he started the
>> thread.
>
> The OP is a very well-known troll who has the habit of spitting out a
> borderline OT article to a bunch of loosly related NGs ever so often
> and then sits back and enjoys the complaints and counter-complaints
> of the regulars.

While I agree cross-posting should be chosen more carefully, it seemed 
like a harmless article to me. I did not get the impression he was just 
trolling. There are people who like to post articles they come across 
and maybe want to start a discussion on.

Like I said, this may have been better to put in a more general 
programming group, and that yes, it is kind of OT for specific language 
groups, but I really saw no harm in it (and I saw no one try to redirect 
the discussion to a more general group), and you and anyone else are 
free to ignore the thread. All I ask is you allow people to make up 
their own minds.

-- 
szr 




From rhamph at gmail.com  Tue May 20 14:37:42 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Tue, 20 May 2008 11:37:42 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com><mailman.1361.1211228890.12834.python-list@python.org><4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com><8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com><3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com><20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
	<mailman.1394.1211307004.12834.python-list@python.org>
Message-ID: <f96cb65f-a20c-482c-9e5f-c7d120b16c15@z24g2000prf.googlegroups.com>

On May 20, 12:09 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> Intern() is gone in 3.0

But not gone far:

>>> import sys
>>> sys.intern
<built-in function intern>


From grante at visi.com  Sat May 10 23:36:36 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 10 May 2008 22:36:36 -0500
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
Message-ID: <gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi>

On 2008-05-11, John Machin <sjmachin at lexicon.net> wrote:

>> "Write a program that prints the numbers from 1 to 100. But for
>> multiples of three print "Fizz" instead of the number and for the
>> multiples of five print "Buzz". For numbers which are multiples of
>> both three and five print "FizzBuzz".
>> 
>> for i in range(1,101):
>>     if i%3 == 0 and i%5 != 0:
>>         print "Fizz"
>>     elif i%5 == 0 and i%3 != 0:
>>         print "Buzz"
>>     elif i%5 == 0 and i%3 == 0:
>>         print "FizzBuzz"
>>     else:
>>         print i
>> 
>> 
>> is there a better way than my solution? is mine ok?
>
> Try doing it using %3 and %5 only once each.

for i in xrange(101):
    print (("","Fizz")[i%3==0] + ("","Buzz")[i%5==0]) or str(i)

His is better though, since it's more obvious what's intended.

Here's one that's less opaque

for i in xrange(101):
    s = ""
    if i%3 == 0: s += "Fizz"
    if i%5 == 0: s += "Buzz"
    if s:
        print s
    else:
        print i
        
There are dozens of other ways to do it.
-- 
Grant Edwards                   grante             Yow!  ... or were you
                                  at               driving the PONTIAC that
                               visi.com            HONKED at me in MIAMI last
                                                   Tuesday?


From pDOTpagel at helmholtz-muenchen.de  Fri May 30 11:03:40 2008
From: pDOTpagel at helmholtz-muenchen.de (Philipp Pagel)
Date: Fri, 30 May 2008 15:03:40 +0000 (UTC)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
Message-ID: <g1p50c$97h$1@news.lrz-muenchen.de>

Skonieczny, Chris <Skonieczny.C at emssatcom.com> wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here: 
> http://mail.python.org/pipermail/python-list/2007-February/427841.html  
>  
> It is not true - eg. try : 
> a='P'            # P is ASCII , isn't it ? 
> b=int(a)
> and what you will get ? An error !!!

'P' is obviously not an ASCII representation of a number.
What did you expect? The closest number by visual appearance?

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f. Genomorientierte Bioinformatik
Technische Universit?t M?nchen
http://mips.gsf.de/staff/pagel


From martin at v.loewis.de  Fri May  9 19:37:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 01:37:07 +0200
Subject: PyXml
In-Reply-To: <mailman.890.1210367123.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
Message-ID: <4824E023.1060803@v.loewis.de>

> What's the story with PyXml?  Is it stable/complete or has effort moved
> elsewhere?

Large parts of PyXML are now part of the standard library. When I
stepped back as a maintainer, nobody volunteered to take over.

> Can anyone recommend a Python validating parser that validates vs Xml
> Schema?

The libxml bindings for Python can do that.

Regards,
Martin


From deets at nospam.web.de  Tue May  6 06:17:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:17:54 +0200
Subject: parameters to lambda's executed at run time.
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
Message-ID: <68apjeF2r9b93U2@mid.uni-berlin.de>

wyleu wrote:

> I'm trying to supply parameters to a function that is called at a
> later time as in the code below:
> 
> llist = []
> 
> for item in range(5):
>     llist.append(lambda: func(item))
> 
> def func(item):
>     print item
> 
> for thing in llist:
>     thing()
> 
> which produces the result
> 
> IDLE 1.2.1
>>>> ================================ RESTART
>>>> ================================
>>>>
> <function <lambda> at 0xb716356c>
> <function <lambda> at 0xb71635a4>
> <function <lambda> at 0xb71635dc>
> <function <lambda> at 0xb7163614>
> <function <lambda> at 0xb716364c>
>>>> ================================ RESTART
>>>> ================================
>>>>
> 4
> 4
> 4
> 4
> 4
>>>>
> 
> How can one allocate a different parameter to each instance of the
> function rather than all of them getting the final value of the loop?

That's a FAQ. Python creates a closure for you that will retain the last
value bound. To prevent that, you need to create a named paramter like
this:

lambda item=item: func(item)

That will bind the current item value at the lambda creation time.

Diez


From info at thegrantinstitute.com  Fri May 16 01:38:53 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 15 May 2008 22:38:53 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080515223853.D27E5C5D92CAB5F9@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080515/be5cdb75/attachment.html>

From manuhack at gmail.com  Fri May 16 18:37:11 2008
From: manuhack at gmail.com (Manu Hack)
Date: Fri, 16 May 2008 18:37:11 -0400
Subject: Rpy Module
In-Reply-To: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
Message-ID: <50af02ed0805161537q26c9ae52oa9c778263d5d5fa1@mail.gmail.com>

On Fri, May 16, 2008 at 6:14 PM, Mike P <michael.pearmain at tangozebra.com>
wrote:

> Hi experts,
>
> I've just seen there is an R module, what i can't see easily is if you
> can / how to import other modules for R into the Rpy module
>
> Can anyone advise on this?


Say if you want to use Hmisc within rpy,

import rpy
rpy.r.library('Hmisc')

Manu
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From devphyl at gmail.com  Tue May 13 06:04:06 2008
From: devphyl at gmail.com (alefajnie)
Date: Tue, 13 May 2008 03:04:06 -0700 (PDT)
Subject: array in class
Message-ID: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>

class A:
   this_is_original_variable_only_for_one_inctance = 0

   def __init__(self, v):
   self.this_is_original_variable_only_for_one_inctance = v


class B:
  this_is_common_for_all_instances = []

  def __init__(self, v):
    self.this_is_common_for_all_instances.append(v)


----------------
now I can create some instances of B, but all of them have the same
array, why

if I use append for b1.this_is_common_for_all_instances, the b2, b3
will have been changed that array.
(where bi is instance of B)
but changes on this_is_original_variable_only_for_one_inctance works
fine

why it does that?
and how create array in class - normal array, "private variable"


From johnjsal at NOSPAMgmail.com  Mon May 12 23:38:52 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:38:52 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<Dqd*eTIcs@news.chiark.greenend.org.uk>
Message-ID: <48290d4c$0$11631$607ed4bc@cv.net>

Matthew Woodcraft wrote:

> I can't tell from what you wrote whether you feel you won't have any
> reason to do any programming, or whether you already know several other
> programming languages and you feel you won't have any reason to use
> Python in particular.

Definitely the former. I've loved programming since I was in high
school, but I've never really had much of a consistent use for it. But
you're right, when there's something to be done that could benefit from
a simple script, it's so much fun to turn to Python to do it.

I think I might try to get involved in helping write the Python
documentation too, so that will keep me involved.


From tjreedy at udel.edu  Thu May  8 13:47:45 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 13:47:45 -0400
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
Message-ID: <fvvebu$ss7$1@ger.gmane.org>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:02860f2a-cd1d-4b1d-ad49-08b13032ba21 at 2g2000hsn.googlegroups.com...
| One of the few Python constructs that feels less elegant than
| necessary to me is the del statement. For one thing, it is overloaded
| to mean three different things:
| (1) del x: Remove x from the current namespace
| (2) del x[i]: Equivalent to x.__delitem__(i)
| (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

Since I see del x.a as deleting a from the attribute namespace of x, I see 
this as the same meaning.  A namespace is a specialized association (keys 
are identifier strings).  A dict is more generalized (keys merely 
hashable).  So ditto for del dic[key].

The only different meaning is del somelist[i].  The implicit association 
between counts in range(n=len(somelist)) *is* broken, but unless i == n-1, 
items are 'shifted down' so that some other item become associated with i, 
and j's for i < j < n-1 get new associations and n-1 is left with none. 
One could imagine del somelist[i] as simple leaving a void in the list. 
(Which is not to say that that would be terribly useful.)

tjr





From thomas.troeger.ext at siemens.com  Wed May 21 06:07:12 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Wed, 21 May 2008 12:07:12 +0200
Subject: Minimal Python installation?
Message-ID: <g10s8k$lgb$1@aioe.org>

Hi,

I'd like to put the python library and interpreter on a small embedded 
Linux x86 compatible device where disk space is an issue. I played 
around with the minimal Python interpreters, but was not entirely happy 
with them, so my question is, is there an (preferably easy) way to put 
the interpreter and a cut-down version of the python library/modules 
that ship with regular Python into a new archive that I can safely copy 
and use? My current method is to copy the python interpreter and the 
python shared library to the device. Then I create a tar archive with 
all startup files from the site package directory to my archive using 
the following one-liner:

strace -f -eopen python -c 'pass' 2>&1 | grep -v ENO | grep '\.py' | awk 
'BEGIN { FS="\"" } { print $2 }' | tar cvf x.tar -T -

This effectively packs all python library files that are accessed upon 
startup into a tar archive. But I figure this method is not what I want 
because there surely are files I am missing here (for example which are 
accessed when starting a script), and what I really want is a minimal 
environment that works. Let's say I want a complete Python install, but 
without all the batteries :-)

Any pointers?

Regards,
Thomas.


From bignose+hates-spam at benfinney.id.au  Mon May  5 01:16:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 05 May 2008 15:16:43 +1000
Subject: Truncate beginning of a file
References: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>
Message-ID: <87zlr5e3es.fsf@benfinney.id.au>

s0suk3 at gmail.com writes:

> file.truncate(X) will truncate the file to at most X bytes (i.e.
> leave the first X bytes of the file and throw away the rest).

Yes, by (IIRC) asking the filesystem to do this in a simple operation.
Most (all?) filesystems support this operation either directly or with
little effort.

> Is there a way to throw away, say, the first X bytes of the file,
> and leave the rest? (Without opening the same file for reading,
> reading and processing, overwriting the file with the new processed
> data, etc.)

I don't know of any filesystem that supports this operation without
reading the file data. The built-in 'file' type doesn't support it.

-- 
 \       "It's easy to play any musical instrument: all you have to do |
  `\       is touch the right key at the right time and the instrument |
_o__)                     will play itself."  -- Johann Sebastian Bach |
Ben Finney


From deets at nospam.web.de  Tue May 20 18:13:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 00:13:44 +0200
Subject: Processing in Python
In-Reply-To: <483345f5$0$902$ba4acef3@news.orange.fr>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
Message-ID: <69h0p9F327mqgU1@mid.uni-berlin.de>

Salvatore DI DI0 schrieb:
> Hello,
> 
> The Processing Graphics language has been implemented in Javascript.

No, it hasn't. Processing is written in Java.

> Does anybody tried to make this in Python ?

There are similar projects, yet maybe not to the same level of integration.

However, pygame + PyOpenGL give you pretty much the same, and even avoid 
some of the limitations of processing.

Diez


From mal at egenix.com  Fri May 30 16:48:39 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 30 May 2008 22:48:39 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <4840657A.2000904@egenix.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>	<g1p781$2j1$00$1@news.t-online.com>
	<4840657A.2000904@egenix.com>
Message-ID: <48406827.10203@egenix.com>

On 2008-05-30 22:37, M.-A. Lemburg wrote:
> On 2008-05-30 17:41, Peter Otten wrote:
>> Josep wrote:
>>
>>> I'm playing with an application framework (or kinda) that's developed
>>> with python, and it throws this error:
>>>
>>>
>>>> File
>>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", 
>>>>
>>>> line 281, in execute
>>>>     sql = unicode(sql, self.Encoding)
>>>> LookupError: unknown encoding: utf_8_euro
>>> At the application (DABO) mailing list, they have pointed that this has
>>> to be a Python issue. As I'm a totally python newbie, I would ask if
>>> somebody has experimented this kind of error, and if there is any known
>>> solution. I've found no clue searching at Google right now.
>>>
>>> My Python version is 2.5.2, Ubuntu Hardy .deb package.
>>
>> Python might get confused by an @EURO suffix in the locale:
> 
> Right, that's what's happening.
> 
> The locale module uses a locale aliasing table that help map environment
> locale settings to C local names.
> 
> That table was last updated in 2004 and since then a lot more
> locale variable strings have made their way into the Linux
> distros.
> 
> I guess we need to update the table...

I've opened ticket http://bugs.python.org/issue3011 for this.

>> $ LANG=de_DE.UTF-8 at EURO
>> $ python -c"import locale; print locale.getdefaultlocale()"
>> ('de_DE', 'utf_8_euro')
>>
>> Try setting the LANG environment variable to something like
>>
>> $ LANG=de_DE.UTF-8
>> $ python -c"import locale; print locale.getdefaultlocale()"
>> ('de_DE', 'UTF8')
>>
>> before you run your program (use ca_ES or whatever you need instead of
>> de_DE).
>>
>> Peter
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 30 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From castironpi at gmail.com  Sat May 17 04:33:44 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 01:33:44 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<95294ce6-38a0-44cd-8b0f-2bce0642886d@27g2000hsf.googlegroups.com>
Message-ID: <69100481-9da1-460f-ac75-6d71e0241f9d@b1g2000hsg.googlegroups.com>

On May 17, 3:06?am, George Sakkis <george.sak... at gmail.com> wrote:
> On May 16, 5:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
>
>
> > This might be more information than necessary, but it's the best way I
> > can think of to describe the question without being too vague.
>
> > The task:
>
> > I have a list of processes (well, strings to execute said processes)
> > and I want to, roughly, keep some number N running at a time. ?If one
> > terminates, I want to start the next one in the list, or otherwise,
> > just wait.
>
> > The attempted solution:
>
> > Using subprocess, I Popen the next executable in the list, and store
> > it in a dictionary, with keyed on the pid:
> > (outside the loop)
> > procs_dict={}
>
> > (inside a while loop)
> > process = Popen(benchmark_exstring[num_started], shell=true)
> > procs_dict[process.pid]=process
>
> > Then I sleep for a while, then loop through the dictionary to see
> > what's terminated. ?For each one that has terminated, I decrement a
> > counter so I know how many to start next time, and then try to remove
> > the record from the dictionary (since there's no reason to keep
> > polling it since I know it's terminated). ?Roughly:
>
> > for pid in procs_dict:
> > ? if procs_dict[pid].poll() != None
> > ? ?# do the counter updates
> > ? ?del procs_dict[pid]
>
> Since you don't look up processes by pid, you don't need a dictionary
> here. A cleaner and efficient solution is use a deque to pop processes
> from one end and push them to the other if still alive, something like
> this:
>
> from collections import deque
>
> processes = deque()
> # start processes and put them in the queue
>
> while processes:
> ? ? for i in xrange(len(processes)):
> ? ? ? ? p = processes.pop()
> ? ? ? ? if p.poll() is None: # not finished yet
> ? ? ? ? ? ? processes.append_left(p)
> ? ? time.sleep(5)
>
> HTH,
> George- Hide quoted text -
>
> - Show quoted text -

No underscore in appendleft.


From maxm at mxm.dk  Sun May 11 07:39:21 2008
From: maxm at mxm.dk (Max M)
Date: Sun, 11 May 2008 13:39:21 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <g06lt9$es3$1@ger.gmane.org>

wxPythoner at gmail.com skrev:

> I have two another interesting things to discuss about, for which I'll
> open new posts on this group. Look for "Python doesn't recognize quote
> types" and "Python, are you ill?".

You have a tendency to form your questions as complaints about Python 
being broken.

You will probably get better responses if you just state that there are 
things you do not understand, and ask why it works that way.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From mbelzile at softimage.com  Thu May 15 16:32:12 2008
From: mbelzile at softimage.com (=?iso-8859-1?Q?Marc-Andr=E9_Belzile?=)
Date: Thu, 15 May 2008 16:32:12 -0400
Subject: Building python 2.5 fails on linux 64
In-Reply-To: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>
References: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>
Message-ID: <0BCB4AE868D8934A8B3DCE3A58126A89021513B3@tewk-mbpf3>

So I tried with 2.6a3 and 3.0 and I ended up with the same error, but python 2.5.2 works though. Seems like something is missing from the build instructions for the newer versions I guess.
 
-mab
 


________________________________

	From: python-list-bounces+mbelzile=softimage.com at python.org [mailto:python-list-bounces+mbelzile=softimage.com at python.org] On Behalf Of Marc-Andr? Belzile
	Sent: May-15-08 10:58 AM
	To: python-list at python.org
	Subject: Building python 2.5 fails on linux 64
	
	
	Hi,
	 
	I have the following error when building python 2.5 (revision 63261)
	 
	./Parser/asdl_c.py -c ./Python ./Parser/Python.asdl
	'import site' failed; use -v for traceback
	Traceback (most recent call last):
	  File "./Parser/asdl_c.py", line 7, in ?
	    import os, sys, traceback
	ImportError: No module named os
	make: *** [Python/Python-ast.c] Error 1
	 
	I'm using gcc version 4.1.1 on Red Hat Enterprise Linux WS release 4 (Nahant Update 4)
	 
	What could be the problem ?
	 
	Thanks for helping.
	 
	-mab

	 

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From ivarnelispam at gmail.com  Mon May 19 01:28:20 2008
From: ivarnelispam at gmail.com (ivarnelispam at gmail.com)
Date: Sun, 18 May 2008 22:28:20 -0700 (PDT)
Subject: Organizing a Python project
Message-ID: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>

Hello all,

I'm starting work on what is going to become a fairly substantial
Python project, and I'm trying to find the best way to organize
everything. The project will consist of:

- A few applications
- Several small scripts and utilities
- Unit tests and small interactive test programs
- A number of custom libraries and modules that may be shared and
referenced among all of the above

I have the following general structure in mind:

myproject/
  app1/
    main.py
    file1.py
    file2.py
    tests/
      test_abc.py
      test_xyz.py
  app2/
    ...
  scripts/
    script1.py
    script2.py
  shared/
    mylib1/
      file1.py
      file2.py
      tests/
        test_foo.py
        test_bar.py
    mylib2/
      ...


The files that you might want to execute directly are:
  - Any of the "main.py" files under app*/
  - Any of the files under shared/
  - Any of the files under app*/tests or shared/mylib*/tests

So, my questions:
First of all, does this look like a reasonable overall structure, or
are there better alternatives?

Second (and the thing I'm primarily interested in), what is the best
way to deal with importing the shared modules in the applications,
scripts, test programs, and possibly other shared modules? I think the
most obvious solution is to add /path/to/myproject to PYTHONPATH.
However, this seems like an annoying little dependency that you are
likely to forget whenever you move your workspace to a new path, open
up a branch of the project in a different directory, or download and
work on the project using a different computer.

Is there a way to set this up that is a bit more self contained? For
example, at first I was somewhat hopeful that Python could ascend
parent directories until it reached a directory that did not include
an __init__.py file, and it could use this as a root for referring to
packages and modules from any file contained within. (e.g. in the
example project above, any file could refer to myproject.shared.mylib1
so long as 'myproject' and all subdirectories contained an
__init__.py, and the parent of 'myproject' didn't contain such a
file). Evidently this is not the case, but it seems like it could be a
useful feature in these situations.

Anyway, I'm sure this is not an unusual situation, so I'm curious to
hear how other people have handled it.

(Note - don't remove 'spam' from my e-mail address when replying. The
address is correct as listed)

Thanks!
Kevin


From hniksic at xemacs.org  Wed May 14 03:01:47 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 14 May 2008 09:01:47 +0200
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
Message-ID: <87r6c5s71g.fsf@mulj.homelinux.net>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Tue, May 13, 2008 at 5:57 PM, Nikhil <mnikhil at gmail.com> wrote:
>>  __len__() is a built-in function of the list object and is updated along
>> with the list object elements and will be useful incase the list is very
>> huge.
>>
>>  len() is an external method again, which may require the processing cycles
>> again.
>
> The purpose of obj.__len__() is to implement len(obj), which simply
> calls it.  So obj.__len__() may be faster, but only marginally.

Have you tried it?  __len__ is in fact marginally slower because it
involves a dict lookup, whereas the built-in len() knows how to cheat
and invoke __len__ through a slot in the C type struct very
efficiently.

$ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
1000000 loops, best of 3: 0.24 usec per loop
$ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
1000000 loops, best of 3: 0.347 usec per loop


From arnodel at googlemail.com  Sat May  3 13:40:20 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 18:40:20 +0100
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <m2zlr7l20r.fsf@googlemail.com>

Szabolcs Horv?t <szhorvat at gmail.com> writes:

[...]
> A little research shows that Mathematica uses a "compensated
> summation" algorithm.  Indeed, using the algorithm described at
> http://en.wikipedia.org/wiki/Kahan_summation_algorithm
> gives us a result around ~ 10^-17:
>
> def compSum(arr):
>     s = 0.0
>     c = 0.0
>     for x in arr:
>         y = x-c
>         t = s+y
>         c = (t-s) - y
>         s = t
>     return s
>
> mean = compSum(data)/len(data)
> print compSum(x - mean for x in data)/len(data)
>
>
> I thought that it would be very nice if the built-in sum() function
> used this algorithm by default.  Has this been brought up before?
> Would this have any disadvantages (apart from a slight performance
> impact, but Python is a high-level language anyway ...)?
>
> Szabolcs Horv?t

sum() works for any sequence of objects with an __add__ method, not
just floats!  Your algorithm is specific to floats.

-- 
Arnaud


From larry.bates at websafe.com`  Tue May 20 19:51:29 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 20 May 2008 18:51:29 -0500
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <YeudnY7U1IiO-a7VnZ2dnUVZ_rvinZ2d@comcast.com>

John Salerno wrote:
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. Here's 
> the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and it's 
> being used as everyone expects it to be used. In example 2, however, I began 
> to think this might be an abuse of list comprehensions, because I'm not 
> assigning the result to anything (nor am I even using the result in any 
> way).
> 
> What does everyone think about this? Should list comprehensions be used this 
> way, or should they only be used to actually create a new list that will 
> then be assigned to a variable/returned/etc.? 
> 
> 

You might use this:

def compress(s)
  return ''.join([ u for u in s if u not in locals()['_[1]'] ])


From tjreedy at udel.edu  Mon May 19 00:22:24 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 00:22:24 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<m2ve1b7msb.fsf@googlemail.com>
Message-ID: <g0qv9t$1ge$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2ve1b7msb.fsf at googlemail.com...
| Lie <Lie.1296 at gmail.com> writes:
|
| > Lambda can actually be safely removed from python and no other
| > features would be missing. It is always possible to create a def
| > version of any lambda, so lambda is useless. It is just a convenience
| > for the times where we're just too lazy to invent a name and find a
| > place to place the def, instead just inlining the function.
|
| Note that the same thing can be said about generator expressions,
| which are nothing more than anonymous, non-reusable, generator
| functions.

Right.  So if someone posted on genexp confusion, I would suggest
'write a full generator function'.

| Instead these were _added_ to the language!

As a convenience.
Actually, if one uses more that one for-clause in a generator expression,
there is a potential gotcha in relation to name capture.  So if that bites,
the genexp is not so much a convenience, and one might better write
the full function.

tjr





From mail at timgolden.me.uk  Thu May 29 08:00:59 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 13:00:59 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483E9AFB.2040402@timgolden.me.uk>

Tim Golden wrote:
> lixinyi.23 at gmail.com wrote:
>> I'm currently working on a scientific computation software built in
>> python.
>> What I want to implement is a Matlab style command window <->
>> workspace interaction.
>>
>> For example, you type 'a=1' in the command window, and you see a list
>> item named 'a' in the workspace.
>> You double click the icon of the item, and you see its value. You can
>> modify the value of the list item,
>> 1 -> 100 etc,  after which if you go back to the command window and
>> type 'a'  and press enter, you see that
>> varable a's value has been changed to 100.
>>
>> So my question is : if you have two DOS command windows running under
>> WINDOWS OS, how can you make them share the same internal variable
>> buffer? Or is there any easier way to implement such kind of
>> interaction?
> 
> I stronly suggest you look at IPython [1]. To do what I think
> you're describing, you'd need to hack or reimplement the interpreter.
> And that's what they've done. ISTR that they even have a branch
> which is dealing with parallel instances.

Sorry, having seen Roger D's memcached suggestion, I realise I may
have misinterpreted your requirement. I thought that you wanted
a Python interpreter session to share its objects to another window,
hence my IPython suggestion. If you're writing your own console app
and want to share stuff, then there's any number of IPC possibilities.

Roger's already mentioned memcached which I've no more than a
passing knowledge of. But Pyro [1] is often a good bet for these
things, and the pyprocessing [2] module is gaining a fair bit of
traction at the moment. (To name just two out of many).

TJG

[1] http://pyro.sf.net
[2] http://pyprocessing.berlios.de/



From lists at cheimes.de  Fri May  2 17:51:13 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 23:51:13 +0200
Subject: 'property' builtin does not work for me
In-Reply-To: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
References: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
Message-ID: <481B8CD1.1010001@cheimes.de>

Alex Fainshtein schrieb:
> As you see, getter works properly. But when assigning to property, setter is
> not called, as I would expect. prop is simply replaced with whatever is
> assigned and ceased being a property.

properties work only for new style classes. You have to subclass your
class from object in order to get a new style class:

class Test(object):
    def getter(self):
        print "Getter called."
        return 'a'

    def setter(self, val):
        print "Setter called."

    prop = property(getter, setter)

Christian



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 06:33:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 12:33:34 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <482abff7$0$11008$426a74cc@news.free.fr>

Dave Parker a ?crit :
(snip spam)

Please stop spamming here trying to sell your dumbass proprietary basic.


From basti.wiesner at gmx.net  Sat May 24 18:42:00 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 00:42:00 +0200
Subject: module import problem
References: <mailman.1545.1211668266.12834.python-list@python.org>
Message-ID: <g1a5ku$b70$01$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ Milos Prudek <prudek at bvx.cz> ]

> If I cd into /usr/share/python-support/python-gnupginterface and launch
> Python I can "import GnuPGInterface". But when I run
> DistUpgradeFetcherCore.py in that folder it always fails with No module
> named GnuPGInterface.
> 
>  I do not know much about setting python path.

Reinstall the package "python-gnupginterface" with "sudo aptitude reinstall
python-gnupginterface".  This should fix the problem, unless your package
management is broken.

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkg4mb0ACgkQn3IEGILecb6jpACfc80saFQz/Q6F5lYbuCUQxJt2
Z+8AoKkB+5hqm0tMmK/d1s1IjsSSCqAz
=Z6/t
-----END PGP SIGNATURE-----


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:50:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:50:06 -0300
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
	<1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>
	<2598173e-356e-49b8-8875-00556f5cfe98@j33g2000pri.googlegroups.com>
Message-ID: <op.ubg5psi2x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 04:04:13 -0300, sandeep <shiningsandy at gmail.com>  
escribi?:

> thanks for ur replies. i have a bit closer look at my code and i am
> able to fix the problem.now my exe is working fine.the code is bit
> more cleaner now as i removed lot of unused function from it and try
> to document it also.

Glad to see it worked finally. Just a few comments:

> #function which will initialise outlook and return its reference
> def getAppRef():
>     temp=win32com.client.Dispatch("OutLook.Application")
>     return temp.GetNamespace("MAPI")

Instead of a comment, use a docstring
<http://docs.python.org/tut/node6.html#SECTION006600000000000000000>

def getAppRef():
     """Initialise outlook and return its reference."""
     ...

>         abc=os.path.isdir(os.getcwd()+'\email')
>         if(abc==True):
>             print 'directory exists'
>         else:
>             os.mkdir(os.getcwd()+'\email')
>         path=os.path.abspath(os.getcwd()+'\email')
>         atmt.SaveAsFile(path+"\\"+atmt.DisplayName)

Use '\\email' instead, or r'\email'. \ is the escape character, '\temp'  
actually isn't what you may think. The rules:  
<http://docs.python.org/ref/strings.html>
Anyway, it's much better to use os.path.join to build a path:

email_dir = os.path.abspath(os.path.join(os.getcwd(), 'email'))
abc = os.path.isdir(email_dir)
if abc:
     print 'directory exists'
else:
     os.mkdir(email_dir)
atmt.SaveAsFile(os.path.join(email_dir, atmt.DisplayName))

> # function to check whether the character encoding is ascii or smthing
> else
> def checkStringType(a):
>     if isinstance(a,str):
>        b='not a unicode string'
>     else:
>         a.encode('utf-8')
>         #print 'unicode type'
>     return a

This function does not perform what the comment says.
The b='...' is useless, and the a.encode(...) line *returns* a string  
(which is immediately discarded) - it does not modify `a`, strings in  
Python are immutable.

-- 
Gabriel Genellina



From skanemupp at yahoo.se  Fri May 16 15:17:50 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 12:17:50 -0700 (PDT)
Subject: save dictionary for later use?
Message-ID: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>

i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.


From rajarshi.guha at gmail.com  Tue May 13 13:10:23 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Tue, 13 May 2008 10:10:23 -0700 (PDT)
Subject: usage of python
Message-ID: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>

Hi, I teach an introductory programming course in Python. As part of
the introduction I'd like to highlight the usage of Python in
industry. The idea is to show that there are big players using Python
for a variety of tasks. Given that the students come from a variety of
backgrounds and are not necessarily 'hackers', I'm trying to look for
examples with a bit of wow-factor.

Is there any list with people/groups/companies using Python for
impressive things?

Any pointers would be appreciated

Thanks,
Rajarshi


From lists at cheimes.de  Mon May  5 15:46:20 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 05 May 2008 21:46:20 +0200
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
In-Reply-To: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
Message-ID: <fvno6d$qgm$1@ger.gmane.org>

brucoder schrieb:
> Any pointers?  A prerequisite that I might be missing?  The source is
> the Python-2.5.2.tar.gz from the Python.org site.

The tar.gz doesn't contain the dependencies like the bsddb files or
sqlite3, bzip2 and more. You have to download and unpack the correct
versions into the correct folder. Please read PCbuild/readme.txt

Christian



From bbxx789_05ss at yahoo.com  Sun May 11 16:30:02 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:30:02 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga> <m21w484o4e.fsf@googlemail.com> 
	<QpIVj.32520$KJ1.5565@newsfe19.lga>
Message-ID: <8878fece-434c-44e0-9386-dc79d376819b@z72g2000hsb.googlegroups.com>

On May 11, 2:11?pm, bc90021 <pyt... at bc90021.net> wrote:
> [CUT]
>
> > I have in no way assumed that you are stupid. ?I have tried to help you
> > formulate your problem better so that people on the list can help you.
> > I believe I have done so respectfully, with the aim of introducing you
> > to the modus operandi of this group.
>
> I appreciate your help. ?However, the comments I got from other people
> that "I'm sure you have quotes here..." type comments are incredibly
> insulting. ?To tell someone that you're sure that they have quotes around
> something when they don't is the height of arrogance and rudeness.
>

The best way to get help is to post a simple example that demonstrates
your problem and that anyone can run and get the same error you are
getting.  That means you need take your real code and you start
hacking out the bits that are irrelevant to the problem.  With
judicious use of print statements you should be able to narrow the
problem down.

Your first post was about as far away from that as it could be.  Your
first post was essentially equivalent to asking:

> Why does this line:

>print name

>display "Jack" and not "Jill".

When you post a question like that, then you are either going to be
met with silence or people will attempt to debug your imaginary code
and guess at the problem, which sometimes works and sometimes
doesn't.  If you find the guesses insulting, then post a better model
of your problem.  The fact that you found these guesses insulting,
even though they were respectfully given and they were the obvious
answers in light of how little information you gave, means you are
probably going to have problems on any newsgroup you post to.

The python community has some real jerks in it, but you didn't meet
any of them in this thread.





> >> (I really must say that so far the help I am getting in the Python
> >> community is a big let down. ?Whether it's on IRC or here, everyone has
> >> an arrogance that I don't find anywhere else in the open source
> >> community, and it seriously makes me question the choice of language
> >> that I've made.)
>
> > Don't judge too quickly. ?I think this newsgroup is on the whole
> > extremely helpful. ?I have learnt a lot from it. ?But you have to get
> > used to its ways, and until you are familiar with them, approach it with
> > humility.
>
> Unfortunately, this is not my first interaction with the Python IRC
> communities or Python newsgroups. ?I had tried working with this language
> a while back (around 2000) and the answers I got were unhelpful and
> usually rude. ?I decided to give it another shot for the program I'm
> writing, and I'm regretting that. ?It's possible that I'm to blame - I'm
> the common factor in both instances, but at the same time, when you ask a
> question in #python and NO ONE ANSWERS at all, and they all just sit
> there not talking at all, what's the point of having the IRC channel? ?If
> newbies can't go there for help, what's the point? ?When there are 70
> people in a channel, and no one even acknowledges your question has been
> asked, where does one go for help? ?It's like talking to yourself.
>
> >> The error message was at the top of the thread (am I incapable of
> >> posting it, or are you incapable of following a thread?), but here it
> >> is again:
>
> >> IOError: [Errno 2] no such file u'tempfileName'
>
> > This is different from the error message that you posted in your
> > original message.
>
> > Anyway, what is useful to us is a full traceback, no just an error
> > message.
>
> It is not "different" except that I posted the full name the second
> time. ?(tempfileName instead of the previously simplified fileName) ?The
> code itself is actually irrelevant, in my humble opinion. ?In one place a
> file creation line does not work; in the second place it does. ?How can
> the same line of code do two different things in two places? ?Either it
> creates a file or it doesn't. ?It should create the file in either place,
> regardless of where it's being called.
>
> Either way, I figured it out.



From skanemupp at yahoo.se  Thu May 15 12:57:50 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:57:50 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org>
Message-ID: <a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>

yeah i was unclear but i tested different stuff at the same time.
and flim is not misspelled i just created it and jolted osmething down
and it became flim...

print os.path.exists('C:/Python25/myPrograms/netflix/flim.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
#print d.readline()
print d.read()

d.close() #not necessary?

print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\training_set')

i can read flim and exists returns true.

however
print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet')
returns True but
print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\training_set') returns False...

i have thourogly checked the filename to be correct and if we assume
it is what could this mean then?
i had a problem one other time when i had renamed a file but windows
didnt rename it compeltely apparently.


From jonbutler88 at googlemail.com  Wed May 21 05:02:22 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 02:02:22 -0700 (PDT)
Subject: Typeerror
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com> 
	<mailman.1414.1211360353.12834.python-list@python.org>
Message-ID: <9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>

On May 21, 9:58?am, Freaky Chris <angry-ch... at hotmail.com> wrote:
> This is a simple error, you are passing the variable res as an interger to
> use for a slice when what ever you are storing in res isn't an integer.
>
> Chris
>
>
>
> Beema shafreen wrote:
>
> > Hi all,
> > I getting the following error when i run my scirpt ,
> > can somebody help me regarding this to solve the type error problem
>
> > Traceback (most recent call last):
> > ? File "get_one_prt_pep.py", line 59, in ?
> > ? ? if len(data[res])<=1:
> > TypeError: string indices must be integers
>
> > --
> > Beema Shafreen
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> View this message in context:http://www.nabble.com/Typeerror-tp17358659p17358932.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

If it is an integer, but stored as a string you can use:

if len(data[int(res)])<=1

its not pretty but it should sort out the type errors


From darcy at druid.net  Thu May 29 17:57:45 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 29 May 2008 17:57:45 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <Xns9AADA759AF2ABduncanbooth@127.0.0.1>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
Message-ID: <20080529175745.b3e7a579.darcy@druid.net>

I guess I am still new to this group and don't understand its charter.
I wasn't aware that it was a Flaming Blunder group.  Can someone please
point me to a newsgroup or mailing list dedicated to the Python
programming language?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From Matthew.Moorland at gmail.com  Mon May  5 15:09:47 2008
From: Matthew.Moorland at gmail.com (ETP)
Date: Mon, 5 May 2008 12:09:47 -0700 (PDT)
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
	<6885g8F2s6gaeU1@mid.uni-berlin.de>
Message-ID: <61e2bf8f-d2e4-48dc-a488-1c8c38cbcd0d@w34g2000prm.googlegroups.com>

I don't doubt I misunderstand since most programming jargon goes over
my head.

That said, I'm sure you can guess my OS is Windows and I don't know
what an API is.  After a quick search it looks like windows uses
something called DirectInput for gaming devices.  Is anyone familiar
with DirectInput?  Is it implementable in Python?

Here's my source: http://msdn.microsoft.com/en-us/library/bb219802(VS.85).aspx

Actually, I found this, too:  http://directpython.sourceforge.net/

Sounds like it is very straight forward.  i would definitely still
appreciate any comments or suggestions on the best way to implement a
game controller.

Thanks again.


From deets at nospam.web.de  Tue May  6 07:33:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 13:33:42 +0200
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <68au1hF2qevdkU1@mid.uni-berlin.de>

clyfish at gmail.com wrote:

> In cmd, I can use find like this.
> 
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 
> C:\>
> 
> And os.system is OK.
>>>> import os
>>>> os.system('netstat -an | find "445"')
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>>>>
> 
> But I don't know how to use subprocess.Popen to do this.

While there certainly are valid usecases for piping with subprocess in
Python - this ain't one I'd say. Just read the output of netstat yourself,
and filter for lines that contain the desired pattern.

Diez


From basti.wiesner at gmx.net  Sat May 24 15:23:58 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 24 May 2008 21:23:58 +0200
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
Message-ID: <g19q1l$pd5$01$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ Diez B. Roggisch <deets at nospam.web.de> ]
>> I finally managed to work with static files with a little hack, but it's
>> ugly because I'm reading each static file per request.
> 
> How else should that work? Apache does that the same way.

I guess, Apache does some kind of memory caching for files, which are often
requested and small enough to fit into the system memory.  May be, that's
what the OP is referring to ...

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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dYYAnjH3E0/e2y0owJ1PuWMk13i9YVA/
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From gnewsg at gmail.com  Wed May 21 23:35:53 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 21 May 2008 20:35:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<2G3Zj.285812$pM4.26927@pd7urf1no>
Message-ID: <20d322a6-3132-4482-83fa-210397fefc8c@27g2000hsf.googlegroups.com>

On 21 Mag, 17:34, Dave Parker <davepar... at flamingthunder.com> wrote:

> [...] symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.
>
> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:
>
>      Set x to 8.

Sorry but... are you really trying to tell us that a person which is
not able to understand "x = 5" should use a programming language?
Such a person shouldn't even use a computer and I strongly doubt that
your syntax solution would make ring a bell in his head!
Besides that what makes you think that:

Set n to 1
Factorial is a function(n) doing
   if n = 0 then return 1 else return n*factorial(n-1).

...is more clear/intuitive than:

n = 1
def factorial(n):
    "this is a function doing:"
    return 1 if n == 0 else n * factorial(n-1)

...?
IMHO, it seems to me that you've just tried to mix "comments" and
"code" into a single thing for no other reason than to be different.
I'd be curious to see some code samples solving some - real world -
problems instead of showing hot to calculate factorials, printing
hello worlds or read from a file, which are the only code samples I've
seen in the homepage and in the documentation.


--- Giampaolo
http://code.google.com/p/pyftpdlib



From rhamph at gmail.com  Tue May 20 00:55:27 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 19 May 2008 21:55:27 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
Message-ID: <58a61ace-5b19-4427-a311-9a0671779fa1@t12g2000prg.googlegroups.com>

On May 19, 11:31 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On Mon, May 19, 2008 at 11:36 AM, Roger Heathcote
> > Fair point, but for sub processes that need to be in close contact with the
> > original app, or very small functions that you'd like 100s or 1000s of it
> > seems like a kludge having to spawn whole new processes build in socket
> > communications and kill via explicit OS calls. I can't see that approach
> > scaling particularly well but I guess there's no choice.
>
> It's not a kludge - the whole reason why killing a thread is undefined
> and a "cardinal sin" is because it's in your own address space and you
> can't guarantee anything about how it left things when you killed it.
> You simply can't have it both ways. If you want to be able to safely
> and sanely kill an uncooperative thread (*especially* third party code
> you don't control) you have to isolate it from your address space, and
> this means a process. This is a fundamental problem with the entire
> idea of shared-state concurrency. For the record, you can't use 1000s
> of threads either - if you really need 1000s of concurrent things
> running you need to re-think your concurrency model and possibly your
> choice of languages and environment.

Strictly speaking, you CAN use 1000s of threads, but it requires some
special effort.

It's not a good idea though, at least for the near future.  If you
want to kill a thread you have to do it cooperatively, and for the
effort required to get that right you might as well make the whole
thing event-driven.


> The messiness of the real world is *why* you should use processes, not
> a reason to avoid them.
>
> > Does anyone think it likely that the threading module (and threading in
> > general) will be improved and augmented with features like timeouts and
> > arbitrary threadicide in the next year or two?  Seems there's little scope
> > for tapping the power of the current generation of multiple cores with the
> > current pythons, tho I appreciate breakneck speed has never been a design
> > objective it looks like multicore is set to be the next generation PC
> > architecture.
>
> They absolutely should not be. Adding an API which can't work in the
> general case and is dangerous even when it can work does not do anyone
> any favors.

I agree, if it's not safe there's no point adding it.

However, if you change the parameters a little bit.. it's quite
possible to redefine many blocking functions as cooperative
cancellation points.  This is the approach I take with python-
safethread, and it should satisfy most purposes.


From gherron at islandtraining.com  Thu May 15 19:00:03 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 16:00:03 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
	<482CA10E.1040602@islandtraining.com>
	<BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl>
Message-ID: <482CC073.20402@islandtraining.com>

Marlin Rowley wrote:
> Hey Gary!

Please keep such discussions on the public python-list -- not  personal 
e-mail.

Scroll down for an answer to your latest question.
>
> Here's what I have that renders fine but I see some optimization that 
> can be done (as you mentioned):
>
> # Tile Generation
> # This is where all the drawing to the client window
> # will happen. 
> def generateTile( txl, tyl, tileWidth, tileHeight, clientWindow ):
>     # make rgba (8-bit) data structure and zero it out.
>     rgb = zeros( tileWidth*tileHeight*3, UnsignedInt8 )
>     alpha = zeros( tileWidth*tileHeight*3, UnsignedInt8 )
>    
>     #print 'tileWidth: %s' % tileWidth
>     #print 'tileHeight: %s' % tileHeight
>     # for each pixel in the tile
>     # we must invert the rendering of each
>     # tile for wxPython's Bitmap support.
>     for y in range( (tileHeight-1),-1,-1 ):
>         for color in range(4):
>            
>             # read per scanline
>             pixelComp = clientWindow.fileIO.read(4*tileWidth) <<<< 
> HERE'S YOUR OPTIMIZATION!!
>    
>             for x in range(tileWidth):
>                 # mental ray streams RGBA components across the width
>                 # of every tile.  so it first does all the r's,
>                 # then all the g's, then all the b's, etc.. across
>                 # the width.. Then it streams the second row, etc..
>                 # However, wxPython Bitmap class accepts an array of
>                 # tuples or just a byte order of RGBARGBARGBA, etc..
>                 # so we convert, keeping track of an offset.
>                 if color < 3:
>                     index = (3*(y*tileWidth+x))+color
>                 else:
>                     index = (3*(y*tileWidth+x))
>                
>                
>                 # RGBA_FP
>                 if clientWindow.pixelCode == 13:
>                    
>                     # unpack the pixel
>                     #fourbytes = pixelComp[:4]
>                     #pixelComp = pixelComp[4:]
>                     buffer = unpack("!f", pixelComp[4*x:4*x+4])  
> <<<<<<<<<<<<<<<<<< YOUR OPTIMIZATION!!
>                    
>                     # convert from 32-bit to 8-bit precision
>                     gamma = clientWindow.gamma
>                     if gamma == 1.0:
>                         pixel = int(255 * buffer[0] + 0.5)
>                         pixel = clamp(pixel,0,255)
>                         if color == 3:
>                             alpha[index+0] = alpha[index+1] = 
> alpha[index+2] = pixel
>                         else:
>                             rgb[index] = pixel
>                     else:
>                         pixel = int(buffer[0] * GAMMA_BIT_PRECISION + 0.5)
>                         pixel = clamp(pixel,0,GAMMA_BIT_PRECISION-1)
>                         # set the color and alpha
>                         if color == 3:
>                             alpha[index+0] = alpha[index+1] = 
> alpha[index+2] = clientWindow.frame.gammaTable[pixel]
>                         else:
>                             rgb[index] = 
> clientWindow.frame.gammaTable[pixel]
>                    
>                        
>                     # ...
>
>     # create an empty rgb and alpha tile
>     tileRGB = wx.BitmapFromBuffer( tileWidth, tileHeight, rgb )
>     tileAlpha = wx.BitmapFromBuffer( tileWidth, tileHeight, alpha )
>          
>     # set up  main device to render to the current
>     # buffers
>     dc = wx.BufferedDC( None,clientWindow.colorBuffer )
>     dca = wx.BufferedDC( None,clientWindow.alphaBuffer )
>    
>     # draw tiles
>     dc.DrawBitmap( tileRGB, txl, (clientWindow.height-tileHeight)-tyl )
>     dca.DrawBitmap( tileAlpha, txl, (clientWindow.height-tileHeight)-tyl )
>
>
> I'm no python expert (as you can tell), but I'm trying.. :)
>
> I started to re-write this function but I'm confused on how to do:
>
> > Reshape the array into a 3D array (i.e., a rectangular array of RGBA
> > values)
>
> this without using a for loop.

Yes, easily.  No Python loops (although plenty of C-level loops.)   (I 
think you are using Numeric -- a ancient predecessor of numpy.  However, 
I think these operations work in Numeric.)


Again I create a small test case.  The values will be in the order 
rrrrggggbbbb to start with, and rgbrgbrgbrgb afterwards.

Create a test array and examine it:
 >>> a = numpy.frombuffer('rrrrggggbbbb', dtype='S1')
 >>> a
array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b'],   
dtype='|S1')

Isolate each color component (here height*width = 4)
 >>> a.shape = (3,4)
 >>> a
array([['r', 'r', 'r', 'r'],
       ['g', 'g', 'g', 'g'],
       ['b', 'b', 'b', 'b']],
      dtype='|S1')

Transpose it.  (This creates a new array by copying efficiently.)
 >>> b = a.transpose()
 >>> b
array([['r', 'g', 'b'],
       ['r', 'g', 'b'],
       ['r', 'g', 'b'],
       ['r', 'g', 'b']],
      dtype='|S1')

Reset it's shape to be a width*height array of rgb's.
 >>> b.shape = (2,2,3)
 >>> b
array([[['r', 'g', 'b'],
        ['r', 'g', 'b']],

       [['r', 'g', 'b'],
        ['r', 'g', 'b']]],
      dtype='|S1')

Put it out in byte array form:
 >>> b.tostring()
'rgbrgbrgbrgb'


Done.


Gary Herron


>
> -M
>
>
> > Date: Thu, 15 May 2008 13:46:06 -0700
> > From: gherron at islandtraining.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > Marlin Rowley wrote:
> > > Gary,
> > >
> > > I'm getting streaming tile data from a renderer in order to allow the
> > > user to see the rendering of tiles in real-time to create the total
> > > image. I'm NOT reading an entire image scanline-by-scanline. The
> > > renderer streams in a series of floats (for each tile) and I build
> > > this tile up from each individual color component passed in. I then
> > > convert it to a small bitmap and blit() it to the window that will
> > > eventually make up my entire image. I'm just wanting to make the
> > > process as fast as the renderer can render the tiles. I've noticed on
> > > scenes that aren't very complex for the renderer that my python 
> script
> > > is spending most of it's time drawing while the renderer is already
> > > done. What you've given me has sped up the drawing a lot, but I'm
> > > hungry for more optimization!
> > >
> > > There is no file format to be read. The data is raw bytes and can be
> > > any format.
> >
> > You are misinterpreting what I mean by a format. All data is a string
> > of bytes, and interpreting that string of bytes to have some particular
> > form is applying a format to it. Your particular format is: each 4
> > bytes represents a float, and a string of such floats give the RGBA
> > values for a rectangle (of some size) of pixels. I doubt that you are
> > the first ever to use that particular format to encode an image, but I
> > also don't believe it matches any of the standard image formats.
> >
> > So... There is still hope to use already written tools to decode your
> > format.
> >
> > Here's a hint on how to use numpy for decoding a byte string into an
> > array of floats. My example byte string is a hand coded string of just
> > 12 bytes -- you should replace that with a whole row or better yet, a
> > whole tile's worth of bytes.
> >
> > >>> import numpy
> > >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'
> > >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)
> > >>> b
> > array([ 1., 2., 3.], dtype=float32)
> >
> >
> > If you want to use the array module instead:
> >
> > >>> import array
> > >>> a = array.array('f')
> > >>> a.fromstring(byteString)
> > >>> a
> > array('f', [1.0, 2.0, 3.0])
> >
> >
> > In either case ANY number of bytes can be decoded into an array of
> > floats, in one highly efficient call from Python.
> >
> > What you do with that array of float afterwards is up to you....
> >
> > If I read your note correctly, here's what I'd do to turn the array of
> > bytes into an image of a tile to be displayed on the screen.
> >
> > Get the whole tile's worth of bytes with one read into a single string.
> > Decode that string into an array of floats (as above).
> > Reshape the array into a 3D array (i.e., a rectangular array of RGBA
> > values)
> > Convert that array of floats into an array of 8-bit integers (scaling
> > all by 255).
> > Extract (via tostring) that array into a string of bytes.
> > Send that string of bytes to the graphics system as an RGBA array of
> > pixels.
> >
> > Each of these calls is one Python call into a highly efficient library.
> > This is using Python as a, so called, glue language.
> >
> > Gary Herron
> >
> >
> >
> >
> >
> >
> >
> > >
> > > > Date: Thu, 15 May 2008 10:09:45 -0700
> > > > From: gherron at islandtraining.com
> > > > CC: python-list at python.org
> > > > Subject: Re: How do I use the unpack function?
> > > >
> > > > John Machin wrote:
> > > > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> 
> wrote:
> > > > >
> > > > >> Marlin Rowley wrote:
> > > > >>
> > > > >>> All:
> > > > >>>
> > > > >>> I've got a script that runs really slow because I'm reading 
> from a
> > > > >>> stream a byte at a time:
> > > > >>>
> > > > >>> // TERRIBLE
> > > > >>> for y in range( height ):
> > > > >>> for color in range(4):
> > > > >>> for x in range( width ):
> > > > >>> pixelComponent = fileIO.read(4)
> > > > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE
> > > > >>>
> > > > >
> > > > > [snip]
> > > > > Perhaps the OP might be able to use the Python Imaging Library 
> (PIL)
> > > > > instead of reinventing an image-file handler.
> > > > >
> > > >
> > > > Indeed. That's why my original answer included the line:
> > > > There are probably better ways overall, but this directly answers
> > > > your question.
> > > >
> > > > Other possibilities.
> > > >
> > > > I don't recognize the file format being read in here, but if it is a
> > > > standard image format, the PIL suggestion is a good way to go.
> > > >
> > > > Or, if it is an image of not too enormous size, read the *whole* 
> thing
> > > > in at once.
> > > >
> > > > Or rather than manipulate the array by carving off 4 bytes at a 
> time,
> > > > just index through it in 4 byte chunks:
> > > > for i in range(width):
> > > > buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> > > >
> > > > Or
> > > > for i in range(0,4*width,4):
> > > > buffer = unpack("!f", pixelComponent[i:i+4])
> > > >
> > > > Or
> > > > Use numpy. Create an array of floats, and initialize it with the 
> byte
> > > > string, making sure to take endianess int account. (I'm quite 
> sure this
> > > > could be made to work, and then the whole operation is 
> enormously fast
> > > > with only several lines of Python code and *no* Python loops.
> > > >
> > > > Or
> > > > ...?
> > > >
> > > > Gary Herron
> > > >
> > > > > --
> > > > > http://mail.python.org/mailman/listinfo/python-list
> > > > >
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > >
> > > 
> ------------------------------------------------------------------------
> > > Windows Live SkyDrive lets you share files with faraway friends. 
> Start
> > > sharing.
> > > 
> <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> ------------------------------------------------------------------------
> Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it 
> out! 
> <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>



From george.sakkis at gmail.com  Wed May 14 10:30:04 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 07:30:04 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
Message-ID: <238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>

On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> > An instance method works on the instance
> > A Static method is basically a function nested within a class object
> > A class method is overkill?
>
> If anything, a static method is overkill. See it this way: *if* you for some
> reason put a method into an enclosing context - isn't it worth having a
> reference to that?

My feeling exactly; these days I almost always use class methods
instead of static. I vaguely remember seeing somewhere an example
where a static method was the only (elegant) solution; neither a class
method nor a plain function would do. I'll post it if I find it unless
someone beats me to it.

George



From banibrata.dutta at gmail.com  Sun May 11 00:17:22 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sun, 11 May 2008 09:47:22 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
Message-ID: <3de8e1f70805102117p584e5920hb4a99166488c6448@mail.gmail.com>

I realized that my query was not making much sense, or a bit convoluted. A
simler form of the question:

For packages which do contain .dlls & .pyd's (not pure Python) their latest
version may be compatible with -- say Python 2.5, whereas I need the version
compatible for Python2.2. Is this a completely manual exercise ?


On 5/11/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
> Thanks Gabriel & Terry. Those explanations make perfect sense.
>
> What is the recommended way, to find the "compatible" packages that include
> .dll's / .pyd's or dependencies that are Python release specific ? For
> example, is there a 'yum' or other automatic dependency checking mechanism
> which works accross OS's (Windows & Linux), which will allow me to find the
> other (s.a. 3rd party) packages, which would work with say Python2.2 ? Is it
> a completely manual exercise, where I read the README or Package Notes or
> Release Notes, and figure out the required version of package ?
>
>
>  On 5/11/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>>
>> En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <
>> banibrata.dutta at gmail.com> escribi?:
>>
>> > given that I already have Python2.5 installed & will install Python2.4,
>> will
>> > copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
>> > i think the answer is "no", but still asking. is it package specific ?
>> >
>> > does it matter if the packages were egg drops ?
>>
>> Packages containing only .py modules ("pure" packages) are OK; packages
>> using C extensions (.dll, .pyd) have to be rebuilt (or you have to download
>> the binaries for the other Python version).
>>
>> --
>> Gabriel Genellina
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From cjw at ncf.ca  Sat May 17 20:00:48 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 17 May 2008 20:00:48 -0400
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <482F71B0.3050808@ncf.ca>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
> 
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C, but I like Python more.
> 
> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

The usual answer is that development 
time is more important than running time.

Since you are likely to be using arrays, 
you might look at numpy, where the 
number crunching is using compiled C code.

> 
> * I don't know how likely it is to find libraries in Python related to
> my research field.
> 
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Try Google with Python and your area of 
interest.  You could well find 
Python-based packages which meet your needs.

> 
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
> 
> Thank you in advance.

Good luck.

Colin W.


From stefan_ml at behnel.de  Sun May  4 01:46:40 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 04 May 2008 07:46:40 +0200
Subject: Error handling in SAX
In-Reply-To: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>
References: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>
Message-ID: <481D4DC0.9060709@behnel.de>

mrkafk at gmail.com wrote:
> (this is a repost, for it's been a while since I posted this text via
> Google Groups and it plain didn't appear on c.l.py - if it did appear
> anyway, apols)

It did, although some people have added google groups to their kill file.


> So I set out to learn handling three-letter-acronym files in Python,
> and SAX worked nicely until I encountered badly formed XMLs, like with
> bad characters in it (well Unicode supposed to handle it all but
> apparently doesn't),

If it's not well-formed, it's not XML. XML parsers are required to reject non
well-formed input.

In case it actually is well-formed XML and the problem is somewhere in your
code but you can't see it through the SAX haze, try lxml. It also allows you
to pass the expected encoding to the parser to override broken document encodings.

http://codespeak.net/lxml/

Stefan


From otaeris at o2.pl  Thu May 29 11:14:46 2008
From: otaeris at o2.pl (otaeris at o2.pl)
Date: Thu, 29 May 2008 17:14:46 +0200
Subject: =?UTF-8?Q?Writing_Empty_folders_into_ZipFile?=
Message-ID: <ee804e1.346a1113.483ec866.59084@o2.pl>

Hello.

I'm having situation writing folders structure into 
a zip file. Folders contain no files. 

Is it possible to do in python ?

Regards,
Bartek


From jschroed at gmail.com  Thu May  8 22:34:59 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 19:34:59 -0700
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
	<92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>
Message-ID: <4878ad7b0805081934j383998b5rd88baa57927c0ce5@mail.gmail.com>

Thanks guys.  That upper() function reminded me to use the isupper()
function.  I got this going in a single pass:

def a(name):
    self_name = name
    # Increment this value every time we add a space
    offset = 0
    for i in xrange(len(name)):
        if i != 0 and name[i].isupper():
            self_name = self_name[:i + offset] + ' ' + self_name[i +
offset:]
            offset += 1

    return self_name

name = "GeneralPacketMeToo"
print a(name)


>>>
General Packet Me Too
>>>

On Thu, May 8, 2008 at 7:04 PM, Eric Wertman <ewertman at gmail.com> wrote:

> Something like this.  I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
>        return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr =  re.sub('[A-Z]',addspace,strng)
>
> print newstr.strip()
>
>
>
> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschroed at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would
> like
> > to print out my CamelCase classes as titles.
> >
> > I would like it to do this:
> >
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
> >
> > Anyone know any easy way to do this?  Thanks.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
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From mnikhil at gmail.com  Wed May 14 14:52:53 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:22:53 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <g0fce5$g59$2@registered.motzarella.org>

Arnaud Delobelle wrote:
> Nikhil <mnikhil at gmail.com> writes:
> 
>> Hi,
>>
>> I am reading a file with readlines method of the filepointer object
>> returned by the open function. Along with reading the lines, I also
>> need to know which line number of the file is read in the loop
>> everytime.
>> I am sure, the line should have the property/attribute which will say
>> the line number of the file.
>>
>> If there is none, do I have to end up using the counter in the loop?
>>
>> fp = open("file", "r")
>> lineno = 0
>> for line in fp.readlines():
>> 	print "line number: " + lineno + ": " + line.rstrip()
>>         lineno = lineno + 1
> 
> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 
Oh I did not know enumerate can be used. Thanks Paul and Arnaud.
I will try this.


From daveparker at flamingthunder.com  Tue May 13 13:33:01 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:33:01 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
Message-ID: <0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>

> You sound like a commercial.

Get Flaming Thunder for only $19.95!  It slices, it dices!

> And while programs and libraries written in assembly may be twice as fast
> as programs and libraries written in C, ...

It's a myth that they're only twice as fast.  An experienced assembly
language programmer can usually get out at least a factor of 5 by
using tricks such as cache-coherence, carry flag tricks, stack
manipulations, etc.

> ... they're real hell to maintain.

That's also a myth.  For example, if C is easy to maintain, why is
Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
the world?  There should be lots of single-asset 8-by-8 shotgun cross
compilers written in C, if C is easier to maintain.

Here's one of the tricks I use:  I wrote an assembly language
preprocessor that takes 1 assembly language source file and generates
the library code for the 8 different target platforms.  That's much
easier than maintaining quirky C code across 8 different platforms --
which is why GCC's support for cross-compilation is often so broken.

On May 13, 10:57?am, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> You sound like a commercial. Is this your way of attracting costumers of FT?
>
> 2008/5/13 Dave Parker <davepar... at flamingthunder.com>:
>
> > > 5-10 times faster for what kind of code?
>
> > ?Mostly numerical analysis and CGI scripting. ?All of Flaming Thunder's
> > ?library code is in assembly language, and Flaming Thunder creates
> > ?statically-linked pure syscall CGI scripts.
>
> > ?> I don't see anything that resembles OO features of python, ...
>
> > ?True. ?But in Python, you don't see statically-linked pure-syscall CGI
> > ?scripts being cross-compiled under Windows for ftp'ing up to a Linux
> > ?server. ?And you don't see the speed of pure assembly language
> > ?libraries.
>
> I see your assembly language libraries and raise you C language libraries. :)
> Python libraries have the speed of pure C language libraries. And
> while programs and libraries written in assembly may be twice as fast
> as programs and libraries written in C, they're real hell to maintain.
> But that doesn't stop you from telling us, that:
>
> > ?And I'll be willing to bet that Flaming Thunder will have
> > ?OO features similar to Python before Python has the features that
> > ?Flaming Thunder already does.
>
> Well, we'll see. But, IMHO, this is highly unlikely.
>
> > ?For many people, being 5 to 10 times faster at numerical analysis and
> > ?CGI scripting is reason enough to pay $19 per year. ?But maybe for
> > ?other people, having slow, inefficient programs and websites is
> > ?acceptable.
>
> Yeah, right, Python is sooooo slow. :) Show us some sites and programs
> that were written in FT.
>
>
>
> > ?> And what is really expensive is brain-cycles, not cpu-cycles.
>
> > ?Depends on whether you're the programmer, or the customer. ?I've found
> > ?that customers prefer products that are 5 to 10 times faster, instead
> > ?of products that were easy for the developer.
>
> If I'm customer, than why should I care about FT?
> If I'm a programmer, I'd better care about brain-cycles.
>
>
>
> > ?And I disagree that Flaming Thunder requires more brain-cycles.
> > ?Because it's based on leveraging existing English and math fluency
> > ?(which was one of the original goals of Python, was it not?), I think
> > ?that Flaming Thunder requires fewer brain-cycles because fewer brains
> > ?cells have to be devoted to memorizing language peculiarities.
>
> Not everybody has grown in English-speaking community, you know. And
> knowing math quite good, I prefer writing "x = y" instead of "Set x to
> y".
>
>
>
>
>
>
>
> > ?> Let alone it is
> > ?> very much a question of view-point if two different looping constructs or
> > ?> keywords are more awkward than one general looping-concept with only one
> > ?> keyword. It's a matter of taste.
>
> > ?Perhaps. ?But if elementary school students can easily understand why
> > ?one programming language gives the answer 100 (Flaming Thunder):
>
> > ? Write 10^2.
>
> > ?but can't understand why another programming language gives the answer
> > ?8 (Python):
>
> > ? Print 10^2
>
> > ?then I think the comparison moves beyond a matter of taste into the
> > ?realm of measurable ease-of-use.
>
> '^' is a bitwise XOR. Python uses "x**y" for raising x to power of y.
> What's your point here?
>
>
>
>
>
>
>
> > ?On May 13, 9:50 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > ?> > Also, several users have rewritten their Python programs in Flaming
> > ?> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > ?> > (Flaming Thunder compiles to native executables). ?So again, since
> > ?> > many people value their time at more than $0, I think that many people
> > ?> > will find that Flaming Thunder is worth $19.95 per year.
>
> > ?> 5-10 times faster for what kind of code? I don't see anything that resembles
> > ?> OO features of python, let alone more advanced concepts like
> > ?> meta-programming, higher-order functions and such. Which save tremendous
> > ?> amounts of time coding. If FT grows these and *still* is 5-10 times faster,
> > ?> I'll salut you.
>
> > ?> And what is really expensive is brain-cycles, not cpu-cycles. Which above
> > ?> described features save.
>
> > ?> > Plus, me getting paid to work on Flaming Thunder is far more
> > ?> > motivating than me not getting paid to work on Python. ?This weekend,
> > ?> > Python users will still be debating how to fix awkwardnesses in the
> > ?> > languages (such as FOR loops where you're just counting the loops and
> > ?> > not referencing the loop variable) -- but Flaming Thunder users will
> > ?> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > ?> > implementing.
>
> > ?> > Python has been around about 15 years, yet still has those
> > ?> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > ?> > those awkwardnesses are already getting fixed. ?The difference: I
> > ?> > can't afford to ignore users.
>
> > ?> Oh *please*! Try getting nearly as feature & library complete as python is
> > ?> today - and *then* I'll point to all the akwardness of FT. Let alone it is
> > ?> very much a question of view-point if two different looping constructs or
> > ?> keywords are more awkward than one general looping-concept with only one
> > ?> keyword. It's a matter of taste.
>
> > ?> Diez
>
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -



From deets at nospam.web.de  Tue May 27 12:08:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 18:08:05 +0200
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <6a2q04F35ab70U1@mid.uni-berlin.de>

> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.

And creating a fork makes it easier?
 
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it

Again - creating a fork makes that better?

> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.

This is a castironpi-esque metaphor. Guess what, I have an ever older one:
the wheels used by roman circus race wagons essentially look the same as on
a formula one car. Round, with a hub in the middle.

Now how about you throw that computers of your out of the window because it
is technology not available in ancient rome, and as change is bad according
to your view- away with it!
 
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
> 
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business

Again: how is that going to help?

You argue that a *fork* is what helps mitigating the problems *a fork called
Py3K* introduces (in your opinion). Now why do you think your company is
more likely to adopt the language "Sverker Nilsson his own fork of Python
that no one else cares about and that won't be supported" - short
SNHOFOPTNOECAATWBS?

If you don't like change - stick to python 2.5. Or whatever suits you. 

For the umpteenth time: how is that going to help you with your "don't
change" issues?

Diez


From inhahe at gmail.com  Mon May 26 15:43:36 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:43:36 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <hoE_j.50548$7a.47091@bignews1.bellsouth.net>

I like to think of a language that would combine low-level and high-level 
features to be used at the programmer's whim.  C--, High Level Assembly, and 
C++ with in-line assembly are examples, but none of them come as high-level 
as Python. Other possible examples might be ctypes, numpy, array.array, and 
I heard a rumor that Python 3.0 might have optional type declarations.   My 
ideal language would be like a version of C++ (including in-line asm), or 
C-- with classes, that's compiled, but supports Python abstractions and 
features wherever possible (including doing away with {}'s and ;'s).

>
> what is crazy about it?
>
> in the same way programming webapps in C would be annoying because you
> have to do a lot of lowlevel tasks it is dumb to program computer ina
> highlevellanguage because you dont have direct access to lowlevel
> tasks meaning you cant program it very efficiently, ie make it fast? 




From http  Sun May 25 18:14:23 2008
From: http (Paul Rubin)
Date: 25 May 2008 15:14:23 -0700
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
Message-ID: <7xy75ym3pc.fsf@ruckus.brouhaha.com>

aahz at pythoncraft.com (Aahz) writes:
> You must have poor project management/tracking.  You WILL pay the cost
> of testing, the only question is when.  The when does have an impact on
> other aspects of the development process.

Well, let's say you used TDD and your program has 5000 tests.  One
might reasonably ask: why 5000 test?  Why not 10000?  Why not 20000?
No number of tests can give you mathematical certainty that your code
is error-free.  The only sensible answer I can think of to "why 5000"
is that 5000 empirically seemed to be enough to make the program
reliable in practice.  Maybe if you used a more error-prone coding
process, or wrote in assembly language instead of Python, you would
have needed 10000 or 20000 tests instead of 5000 to get reliable code.

But then one might reasonably ask again: why 5000 tests?  Why not 2000
or 1000?  Was there something wrong with the coding process, that
couldn't produce reliable code with fewer tests?

So, I think you have to consider the total development cycle and not
treat test development as if it were free.

I also haven't yet seem an example of a real program written in this
test-driven style that people keep touting.  I use doctest when
writing purely computational code, and maybe it helps some, but for
more typical code involving (e.g.) network operations, writing
automatic tests (with "mock objects" and all that nonsense) is a heck
of a lot more work than testing manually in the interactive shell, and
doesn't seem to help reliability much.  I'd be interested in seeing
examples of complex, interactive or network-intensive programs with
automatic tests.


From deets at nospam.web.de  Mon May 26 07:52:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 13:52:51 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
Message-ID: <69vmlgF35akucU1@mid.uni-berlin.de>

nik600 wrote:

> Hi to all
> 
> i'd like to create a window that integrates a browser control, the
> browser control must support html, javascript and css.
> 
> Is possible to include something that uses the same engine of firefox?
> 
> Thanks to all in advance

What OS, what GUI toolkit?

Diez


From bronger at physik.rwth-aachen.de  Fri May  2 10:26:51 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 16:26:51 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
Message-ID: <87y76ssrx0.fsf@physik.rwth-aachen.de>

Hall?chen!

D'Arcy J.M. Cain writes:

> On Fri, 02 May 2008 23:30:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>
>> The OP was asking why people prefer on over the other. My answer
>> is that I prefer specifying "give me the default OS Python"
>> because anything not installed by the OS is to non-standardised
>> for me to worry about.
>
> [...]
>
> Certainly #! /usr/bin/python is fine if you never expect your
> software to run outside of your own little corner of the world but
> you asked why people prefer the env version and the answer is that
> we want to write software that runs everywhere that Python runs.

Granted, but you must draw the line somewhere anyway.  I cannot
pollute my program with hundreds of if clauses just to make it work
on every quirky system.  It's the *systems* where the streamlining
must happen, not the programs.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From wxPythoner at gmail.com  Sun May 11 04:10:19 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 01:10:19 -0700 (PDT)
Subject: Some error messages in Python are ugly
Message-ID: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>

This really looks ugly for an error message:

[1]+  Stopped                 python


Please explain to me the role of the '+' sign. And why is there such a
gap between 'Stopped' and 'python'?


From mcknight0219 at gmail.com  Fri May 23 02:29:43 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 22 May 2008 23:29:43 -0700 (PDT)
Subject: can python do some kernel stuff?
Message-ID: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>

Hi to all

python now has grown to a versatile language that can
accomplish tasks for many different purposes. However,
AFAIK, little is known about its ability of kernel coding.

So I am wondering if python can do some kernel coding that
used to be the private garden of C/C++. For example, can python
intercept the input of keyboard on a system level? someone told me
it's a kernel thing, isn't it?


From inhahe at gmail.com  Tue May 20 17:49:43 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 17:49:43 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
Message-ID: <OGHYj.12654$hv2.8128@bignews5.bellsouth.net>

  def __init__(self, filename, initial):

should be

  def __init__(self, filename, initial=[]):

(that was the whole reason i put the filename first.)

sorry.





From pavlovevidence at gmail.com  Tue May 27 03:23:58 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 27 May 2008 00:23:58 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>
Message-ID: <e95c5e6d-fc7b-47dc-b04e-67088a784fb4@x41g2000hsb.googlegroups.com>

On May 27, 2:37 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:
>
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python?  Not that I plan to name all my variables with hungarian notation, but just for when it's appropriate.
>
> You are likely to get some links to PEP 8 for coding style and naming
> conventions, but it turns out PEP 8 doesn't really say yay or nay on
> the Hungarian notation topic.
>
> My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
> about for "python hungarian notation" led me through some like-minded
> sites.  But I also found this entry on Joel Spolky's site (http://www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
> warns against tarring all Hungarian-type notations with the same
> brush.

The name of a variable is a valuable resource.  There are all kinds of
things you can encode in it, but you have to choose only one or two.
The most important information is what it is (e.g., box), or what it's
archetype is (i, for a counter variable).  Pretty much all names
should contain one of these two.  Second most important are
discriminators such as a description (red_box), usage (shoebox), or
circumstance (next_box).

But sometimes other things are important enough to warrant addition to
the name.  Type usually isn't one of them, but there are times when
it's helpful to know.  But then, I'm not sure I would call it
"Hungarian notation" to add ad hoc type information to a few of names
here and there.

One convention I have for myself is to use x<elementname> for elements
when I'm using ElementTree, but the reason is pragmatic: I'm creating
objects that have the same name as the elements.


> So with that article in mind, I'd have to ask, what do you mean by
> "appropriate"?

It seems like OP wanted to disambiguate two objects based on type,
which seems reasonable to me.  Sometimes you want to have side-by-side
represenations of something where type is the main difference, in
which case there's no reason type shouldn't be added to the name.


Carl Banks


From msh at blisses.org  Fri May 16 11:31:16 2008
From: msh at blisses.org (Matt Herzog)
Date: Fri, 16 May 2008 10:31:16 -0500
Subject: Python book question
Message-ID: <20080516153116.GF13079@chicago.blisses.org>

People keep telling me I need a course in "Data Structures and Algorithms."

Since Python is the only language that doesn't give me headaches I thought this book might be good. Has anyone read it or can anyone recommend the author? Can anyone recommend a better Data Structures and Algorithms book? 

The book: http://www.fbeedle.com/053-9.html

-- Matt H.

-- 
"Outside of a dog, a book is a man's best friend. Inside of a dog, it is too dark to read."   
--  Groucho Marx



From jldunn2000 at googlemail.com  Thu May 29 04:36:44 2008
From: jldunn2000 at googlemail.com (loial)
Date: Thu, 29 May 2008 01:36:44 -0700 (PDT)
Subject: Compare 2 files and discard common lines
Message-ID: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>

I have a requirement to compare 2 text files and write to a 3rd file
only those lines that appear in the 2nd file but not in the 1st file.

Rather than re-invent the wheel I am wondering if anyone has written
anything already?



From skanemupp at yahoo.se  Fri May 16 14:41:29 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 11:41:29 -0700 (PDT)
Subject: write to specific line in file?
Message-ID: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>

i ahve a program that takes certain textsnippets out of one file and
inserts them into another.

problem is it jsut overwrites the first riow every time.

i want to insert every new piece of text into the next row.
so:
1. how do i write to a new line every time i write to the file?

2. if i dont want to write to a new line but just want to insert it
after the last token in the file, how do i do then?


From M8R-yfto6h at mailinator.com  Wed May 14 21:54:31 2008
From: M8R-yfto6h at mailinator.com (Mark Tolonen)
Date: Wed, 14 May 2008 18:54:31 -0700
Subject: Using the indent method
References: <ffbc75e3-612b-4195-b9c1-11df9e66d286@f63g2000hsf.googlegroups.com>
Message-ID: <-eWdnTt5ip1PCrbVnZ2dnUVZWhednZ2d@comcast.com>


"dj" <d.a.abernathy at gmail.com> wrote in message 
news:ffbc75e3-612b-4195-b9c1-11df9e66d286 at f63g2000hsf.googlegroups.com...
> Hello All,
>
> I am using elementtree to write an XML document and I am having a hard
> time adding the correct indentation.
> I have tried using the indent method, but I can not figure out how to
> use it. Any suggestions.

Using the version of indent() found on 
http://effbot.org/zone/element-lib.htm:

>>> from xml.etree import ElementTree as ET
>>> x='<a><b /><c /><d>stuff</d><e><f /></e></a>'
>>> e=ET.fromstring(x)
>>> ET.dump(e)
<a><b /><c /><d>stuff</d><e><f /></e></a>
>>> indent(e)
>>> ET.dump(e)
<a>
  <b />
  <c />
  <d>stuff</d>
  <e>
    <f />
  </e>
</a>

-Mark 



From s0suk3 at gmail.com  Sun May  4 22:54:09 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 19:54:09 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com> 
	<05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>
Message-ID: <07c6e440-18fb-4a97-83b8-e9751bf9e56c@y38g2000hsy.googlegroups.com>

On May 4, 6:59 am, Protected <myshel... at gmail.com> wrote:
> On May 4, 12:18 pm, s0s... at gmail.com wrote:
>
>
>
> > On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > > I had previously ran the import line. I prepended it to the example
> > > code I'm trying to run every time but it did not help, still nothing
> > > happens. With or without var before 'root'. I'm pasting the code in
> > > IDLE and using Windows XP as written in the first post.
>
> > Tkinter doesn't work if you type the statements in IDLE. I don't
> > remember the specifics of it, but essentially it doesn't work because
> > IDLE is itself a Tkinter app. You have to type it at the Python
> > command line or save it in a file. BTW, if you're on Windows, you
> > should definitely check wxPython. I used to work with Tkinter,
> > struggling with it all the time only to get a lame result most of the
> > time. Then I switched to wxPython, and in the same week I was learning
> > it I did a better GUI than I ever did in Tkinter (with months of
> > work!). I feel it makes it easier to make your program have a better
> > structure and design, and thus lets you focus on the actual task of
> > the program, rather than in the GUI itself. Plus, on Windows, you'll
> > get the widgets to look more natively, like any good quality
> > application there is on Windows.
>
> Ah, but is it cross platform?
>
> (Thanks for letting me know about IDLE.)

Of course. I forgot to say about that. It is cross platform, like most
things in Python. I'd say it's actually more cross platform than
Tkinter, because of the looks of both in different platforms. In
Tkinter, you can get all the widgets to work in all the platforms it
supports, but the widgets look so different on different platforms,
that at the end you end up modifying the code anyway so that the
controls look better on the platform that you port the program to.
With what I've done with wxPython, the controls look great on any of
the platforms I've tried my programs in. Another thing: wxPython is a
port of the wxWidgets toolkit which is for C++. It has also been
ported to a bunch of other languages like Ruby, Perl, C#, etc; so if
you learn any of the languages which wxWidgets has been ported to, you
can use the toolkit in the same way that you've been doing with
Python, except that with the syntax of the other language.


From wuwei23 at gmail.com  Fri May 23 22:39:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:39:19 -0700 (PDT)
Subject: webspider, regexp not working, why?
References: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
	<mailman.1511.1211563636.12834.python-list@python.org>
Message-ID: <4f7add9e-fbcc-4418-a0f0-ef5a542e8fce@q24g2000prf.googlegroups.com>

On May 24, 3:26 am, "Reedick, Andrew" <jr9... at ATT.COM> wrote:
> c)  If you're going to parse html/xml then bite the bullet and learn one
> of the libraries specifically designed to parse html/xml.  Many other
> regex gurus have learned this lesson.  Myself included.  =)

Agreed. The BeautifulSoup approach is particularly nice (although not
part of stdlib):

>>> import urllib
>>> from BeautifulSoup import BeautifulSoup
>>> html = urllib.urlopen('http://www.python.org/').read()
>>> soup = BeautifulSoup(html)
>>> links = [link['href'] for link in soup('link')]
>>> links[0]
u'http://www.python.org/channews.rdf'

- alex23



From mail at timgolden.me.uk  Mon May 19 06:04:50 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 19 May 2008 11:04:50 +0100
Subject: Using Python for programming algorithms
In-Reply-To: <48314dd0$0$32138$426a34cc@news.free.fr>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <483150C2.3080700@timgolden.me.uk>

Bruno Desthuilliers wrote:
> 2/ actually, all known Python implementations compile to byte-code.

In curiosity, did your "actually" mean, in the French sense, "at the moment" 
or, in the English sense, "in contrast to something stated earlier"? Or maybe both?

TJG


From george.sakkis at gmail.com  Fri May  2 04:24:50 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 01:24:50 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com> 
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com> 
	<7917a0b4-7af2-46f0-adec-33d3b191eb17@y22g2000prd.googlegroups.com>
Message-ID: <423509ff-f32a-4e63-b9be-80271e70aef6@25g2000hsx.googlegroups.com>

On May 2, 2:17?am, Matimus <mccre... at gmail.com> wrote:

> On May 1, 10:50 pm, George Sakkis <george.sak... at gmail.com> wrote:
>
>
>
> > On May 1, 11:46 pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
>
> > > Yves Dorfsman wrote:
>
> > > > In the following script, m1() and m2() work fine. I am assuming m2() is
> > > > faster although I haven't checked that (loops through the list twice
> > > > instead of once).
>
> > > Well, let's check it:
>
> > > $ python -m timeit -s "import x" "x.m1()"
> > > 100000 loops, best of 3: 6.43 usec per loop
>
> > > $ python -m timeit -s "import x" "x.m2()"
> > > 100000 loops, best of 3: 8.34 usec per loop
>
> > > As it turns out, m1 is faster than m2. The reason is that list
> > > comprehensions do the loop in C, whereas the for-append pattern does the
> > > loop on the Python level.
>
> > > > Now what I am trying to do is something like m3(). As currently written
> > > > it does not work, and I have tried different ways, but I haven't managed
> > > > to make it work.
>
> > > > Is there a possibility ? Or is m2() the optimum ?
>
> > > > [...]
> > > > def m1():
> > > > ? colours = [ e['colour'] for e in l ]
> > > > ? nums ? ?= [ e['num'] ? ?for e in l ]
>
> > > > def m2():
> > > > ? colours = []
> > > > ? nums ? ?= []
> > > > ? for e in l:
> > > > ? ? colours.append(e['colour'])
> > > > ? ? nums.append(e['num'])
>
> > > > #def m3():
> > > > # ?colours, nums = [ e['colour'], e['num'] for e in l ]
>
> > > m3 doesn't work because you're building a list of 10 color/number pairs
> > > that you're trying to unpack that into just two names. The working
> > > "derivative" of m3 is m1, which is the most natural, fastest and
> > > clearest solution to your problem.
>
> > Another alternative is:
>
> > from operator import itemgetter
>
> > def m3():
> > ? ? colours, nums = zip(*map(itemgetter('colour','num'), l))
>
> > It's slower than m1() but faster than m2(); it's also the most
> > concise, especially if you extract more than two keys.
>
> > George
>
> Why deal with zip and unpacking?

DRY [1].

This seems more obvious to me:
>
> colours, nums = map(itemgetter('colour'), l), map(itemgetter('num'),
> l)

Maybe, but now extend it to three keys. And then four. And then... you
see my point.

George

[1] http://en.wikipedia.org/wiki/Don%27t_repeat_yourself


From bignose+hates-spam at benfinney.id.au  Mon May 12 03:42:52 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 17:42:52 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
Message-ID: <873aoo6k8z.fsf@benfinney.id.au>

Paddy <paddy3118 at googlemail.com> writes:

> I've used Fortran and C and so would tend to use either i,j,k as the
> unused loop variable above, or, for clarity, call it something
> descriptive like loop_count, if the loop body would be clearer.

The problem with all of these names is that they also have long
precedent as names of values that *will* be used inside the loop.

Because of the precedent of those names, choosing one of those names
doesn't make it clear to the reader that the value is never used; they
have no indication from you of that until they look over the code a
few times. It's implicit rather than explicit.

-- 
 \     "As I bit into the nectarine, it had a crisp juiciness about it |
  `\          that was very pleasurable - until I realized it wasn't a |
_o__)            nectarine at all, but A HUMAN HEAD!!"  -- Jack Handey |
Ben Finney


From castironpi at gmail.com  Wed May 14 19:54:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:54:56 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
Message-ID: <dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>

On May 14, 5:41?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> dj schrieb:
>
> > Hello,
>
> > Rather then holding my XML document in memory before writing it to
> > disk, I want to create a file object that elementtree will write each
> > element to has it is created. Does any one know how to do that ?
>
> > Here is my code so, far:
>
> > fd = open("page.xml", "w")
> > tree.write( fd, encoding="iso-8859-1")
>
> > I know there's something I am doing wrong, but I just do not know
> > what.
>
> This isn't possible. How should ET handle the case that you add a
> child-node to a node that has been rendered already?
>
> What you could try is to serialize subtrees that are closed to a stream.
>
> Diez

What do we render?


From ivan.illarionov at gmail.com  Thu May  1 10:43:30 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 14:43:30 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
Message-ID: <fvckui$303g$1@news.mtu.ru>

On Thu, 01 May 2008 08:30:03 -0500, Nick Craig-Wood wrote:

> Lance Gamet <lance at gamet.com> wrote:
>>  This project will store most of its actual data in a shared-database,
>>  but I have a small amount of user specific data that I need to be
>>  stored like configuration or preferences for example, the list of
>>  databases that the program should connect to.
>> 
>>  On Unix this might be a .file, on windows this could be in the
>>  registry, or an ini file or an xml file in ProgramData or AppData or
>>  something.
>> 
>>  Is there a pythony way to store such config data, perhaps there is
>>  already a standard python package for such a purpose?
> 
> I've found
> 
>   http://docs.python.org/lib/module-ConfigParser.html
> 
> To be easy to use and built in.  It makes human readable / editable .ini
> - like files.

IMO .ini-like config files are from the stone age. The modern approach is 
to use YAML (http://www.yaml.org). 

It has a lot of advantages over .ini and xml, YAML syntax was designed to 
be easily mapped to Python data types and is very similar to Python.

More at http://en.wikipedia.org/wiki/YAML

As for where to store it, I completely agree with Nick Craig-Wood.

-- 
Ivan


From lowell at allemansonline.com  Thu May 29 10:53:50 2008
From: lowell at allemansonline.com (Lowell Alleman)
Date: Thu, 29 May 2008 10:53:50 -0400
Subject: Custom log handler and logging.config.fileConfig()
In-Reply-To: <72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>
References: <mailman.1700.1212008047.12834.python-list@python.org>
	<72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>
Message-ID: <839ec5810805290753o5a1c83a2ie29bb481838589cf@mail.gmail.com>

Is there any reason not to do this assignment in the "myhandler.py"
directly?  This would save a step for each application that needs to
use it.

Starting from your example, it would now look like this:

# -- myhandler.py ---
import logging.handlers

class MySpecialHandler(logging.handlers.RotatingFileHandler):
    def __init__(self, fn):
        logging.handlers.RotatingFileHandler.__init__(self, fn,
           maxBytes=2000, backupCount=3)

# Register handler in the "logging.handlers" namespace
logging.handlers.MySpecialHandler = MySpecialHandler


# -- app.py ---
import logging.handlers, logging.config
import myhandler

logging.config.fileConfig("logging.ini")
...


> Hi Lowell,
>
> I think it's OK to use the logging.handlers namespace to add your
> custom handlers - after all, the handlers namespace is for holding
> handlers other than the basic ones included in "logging". So...
>
> # -- myhandler.py ---
> import logging.handlers
>
> class MySpecialHandler(logging.handlers.RotatingFileHandler):
>    def __init__(self, fn):
>        logging.handlers.RotatingFileHandler.__init__(self, fn,
> maxBytes=2000, backupCount=3)
>
>
> # -- logging.ini ---
> [loggers]
> keys=root
>
> [handlers]
> keys=hand01
>
> [formatters]
> keys=form01
>
> [logger_root]
> level=NOTSET
> handlers=hand01
>
> [handler_hand01]
> class=handlers.MySpecialHandler
> level=NOTSET
> formatter=form01
> args=("rotating.log",)
>
> [formatter_form01]
> format=%(asctime)s %(levelname)s %(message)s
> datefmt=
> class=Formatter
>
> # -- app.py ---
> import logging.handlers, logging.config
> from myhandler import MySpecialHandler
>
> logging.handlers.MySpecialHandler = MySpecialHandler
>
> logging.config.fileConfig("logging.ini")
>
> logger = logging.getLogger("test")
>
> for i in xrange(100):
>    logger.debug("Message no. %d", i)
>
>
> should produce the expected results.
> --
> http://mail.python.org/mailman/listinfo/python-list


From marco at sferacarta.com  Mon May 12 09:27:07 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 15:27:07 +0200
Subject: Now what!?
In-Reply-To: <9GlVj.168$PE5.102@fe087.usenetserver.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
Message-ID: <NAXVj.40732$o06.8730@tornado.fastwebnet.it>

notbob wrote:

> frustrated and give up on learning programming, not really caring much for
> coding, anyway.  But, dammit, I'm gonna stick with it this time.  I'll learn
> python if it kills me!

No, it won't kill you but make you stronger ;)


From http  Sun May 11 01:38:55 2008
From: http (Paul Rubin)
Date: 10 May 2008 22:38:55 -0700
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <7xabix2yds.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.

It is pretty natural in imperative-style code.  The one thing I'd do
differently is use xrange instead of range, to avoid creating a
10-element list in memory before starting the loop.


From boblatest at googlemail.com  Wed May 21 05:38:10 2008
From: boblatest at googlemail.com (boblatest at googlemail.com)
Date: Wed, 21 May 2008 02:38:10 -0700 (PDT)
Subject: C-like assignment expression?
Message-ID: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>

Hello,

I have an if-elif chain in which I'd like to match a string against
several regular expressions. Also I'd like to use the match groups
within the respective elif... block. The C-like idiom that I would
like to use is this:

if (match = my_re1.match(line):
  # use match
elsif (match = my_re2.match(line)):
  # use match
elsif (match = my_re3.match(line))
  # use match

...buy this is illegal in python. The other way is to open up an else:
block in each level, do the assignment and then the test. This
unneccessarily leads to deeper and deeper nesting levels which I find
ugly. Just as ugly as first testing against the RE in the elif: clause
and then, if it matches, to re-evaluate the RE to access the match
groups.

Thanks,
robert


From grante at visi.com  Thu May 22 17:00:02 2008
From: grante at visi.com (Grant Edwards)
Date: Thu, 22 May 2008 16:00:02 -0500
Subject: Bug in ssl-object library reference page or in ssl-object code?
Message-ID: <zfmdnWV97o1PQ6jVnZ2dnUVZ_qninZ2d@posted.visi>

According to http://docs.python.org/lib/ssl-objects.html

  17.2.2 SSL Objects

  SSL objects have the following methods.

  read([n])
  
    If n is provided, read n bytes from the SSL connection,
    otherwise read until EOF. The return value is a string of
    the bytes read.

The behavior I observer when n is not provided doesn't agree
with the description.  When I call read(), it appears that I
get whatever data is currently available.  It does not read
until EOF.  This seems to agree with the comment on the
"example" page:

 http://docs.python.org/lib/socket-example.html

   # Read a chunk of data.  Will not necessarily
   # read all the data returned by the server.
   data = ssl_sock.read()

If read() did indeed read until EOF, then it would always
read all of the data returned by the server.

Is this a bug in the doc or in the code?

-- 
Grant Edwards                   grante             Yow! How do I get HOME?
                                  at               
                               visi.com            


From landofdreams at gmail.com  Thu May  1 01:46:24 2008
From: landofdreams at gmail.com (Sam)
Date: Wed, 30 Apr 2008 22:46:24 -0700 (PDT)
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org> 
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com> 
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
Message-ID: <6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>

> I didn't look it up myself, but maybe a __init__.py file is missing
> so that it can be recognised as a package.

No, every single one (S, B, and W) has its own __init__.py

> >> > in u.py Python gives "ImportError: No module named S".
>
> >> A silly question: is the directory that contains "S" in PYTHONPATH or
> >> in sys.path?
>
> > It's in sys.path.
>
> "S" or its parent directory?

I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?

Sam


From sjdevnull at yahoo.com  Wed May 21 15:23:14 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Wed, 21 May 2008 12:23:14 -0700 (PDT)
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org> 
	<D6udnVPRN5dPtqnVnZ2dnUVZ_qHinZ2d@posted.visi>
Message-ID: <3139388e-f453-437e-bbc3-abb10fa2d94c@2g2000hsn.googlegroups.com>

On May 21, 10:04 am, Grant Edwards <gra... at visi.com> wrote:
> Yes, C defines "char" to be one byte, but it doesn't define the
> size of a "byte" other than it's at least big enough to hold
> one character (or something like that).  In practice, a byte is
> pretty much guaranteed to be at least 8 bits.

If you're discussing standard C, you can omit "in practice" and
"pretty much".  CHAR_BITS is required to be at least 8 by the ANSI/ISO
C Standard.

> But, on some targets a "byte" is 16 bits, and on others a byte
> is 32 bits.

Yep, or 9 bits or 36 bits, or anything >= 8.


From martin at v.loewis.de  Sun May 25 16:13:26 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:13:26 +0200
Subject: set partition question
In-Reply-To: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <4839c866$0$32633$9b622d9e@news.freenet.de>

> s0 = set([1])
> s1 = set([1,2])
> s2 = set([2])
> S = set([s0,s1,s2])
> one answer we're searching for is s0 = s1 - s2
> 
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...) and arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any operation or function which
> takes and returns sets.

In that case, there is always a trivial answer. As I can use any
function which takes and returns sets, and as I shall come up with
a function that returns s0, I just use the following function

def f(s):
   return s0

To compute s0, just invoke f with any other of the sets, and you
will - get s0.

> I think this problem is related to integer partitioning, but it's not
> quite the same.

I think the problem is significantly underspecified. It would be a more
interesting problem if there was a restriction to a few selected set
operations, e.g. union, intersection, difference, and combinations
thereof.

Regards,
Martin


From corvettecraz92 at gmail.com  Sat May 31 15:28:33 2008
From: corvettecraz92 at gmail.com (corvettecraz92 at gmail.com)
Date: Sat, 31 May 2008 12:28:33 -0700 (PDT)
Subject: Question about files?
References: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>
	<INedneYt2rOlO9zVnZ2dnUVZ_qzinZ2d@earthlink.com>
Message-ID: <a9501197-1f56-4cd6-9620-408ea5ef9df8@79g2000hsk.googlegroups.com>

On May 31, 3:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sat, 31 May 2008 11:44:14 -0700 (PDT), corvettecra... at gmail.com
> declaimed the following in comp.lang.python:
>
> > I want to create a program where a user can type what ever they want
> > to, have it saved to a file, and the be able to re-open it and read
> > it. How would I do this? Thanks!
>
> import os
> os.system("edit") ? ? # may be Windows specific
>
> ? ? ? ? Start with:http://www.catb.org/~esr/faqs/smart-questions.html
>
> (or, to expand on it... Exactly what part of the task are you having
> problems with? Opening files for read/write/update? Designing a command
> set for an editor? Designing a GUI for a text editor; what toolkit, does
> it have a generic text edit widget already? Do you really need to write
> another text editor when there are so many available that come with most
> operating systems (Windows: edit, notepad, maybe even wordpad;
> UNIX/Linux type systems: vi, vim, gvim, emacs) or can be downloaded
> (SciTE) )
>
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

No, what I mean is for the user to input text directly into the python
program, then the program would save it to a file and display it after
it is created.


From saluk64007 at gmail.com  Fri May  9 11:44:21 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Fri, 9 May 2008 08:44:21 -0700
Subject: Free Memory
In-Reply-To: <g0161h$lc3$1@ger.gmane.org>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
Message-ID: <c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>

I had some very interesting results with this code to do what is asked:

for key in globals().keys():
    del globals()[key]
for key in locals().keys():
    del locals()[key]

It might be better to reverse the two steps, I didn't give it much thought.
Anyway, when this is done, all of the builtins spill into globals and locals
(since __builtin__ was deleted).  I thought that was interesting.

It did have the effect that is asked for, although there may be more
unintended consequences.  Also if any objects are attached to any of the
builtins I expect they will still be around.
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From timr at probo.com  Sun May 11 19:26:07 2008
From: timr at probo.com (Tim Roberts)
Date: Sun, 11 May 2008 23:26:07 GMT
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <h10f24p4a00pmjbe21m70u0g0gppc2e6fj@4ax.com>

wxPythoner at gmail.com wrote:
>
>If you are in the interactive prompt of the Python interpreter and you
>do this
>
>print """Testing\"""   or   print '''Testing\'''
>
>you get three dots [...] as if Python expects a code block.

...which it does.

>If you
>press Enter, you get three dots again, and again, and again... You
>can't get out of the code block with pressing the Enter key; you have
>to press Ctrl+Z (if you're in Linux) in order to get out of that code
>block, 

No, you don't.  You can also enter """ or ''' to properly close the quote.

>If you do
>
>print "Testing\"   or   print 'Testing\'
>
>you get an error, but not of you use the triple quotes. Is that a bug
>in the interpreter perhaps?

As a general rule, when you are just beginning to learn some product, it is
safe to assume that anything you see as a bug in the product is almost
certainly a flaw in your understanding of the product.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From vadim.pestovnikov at gmail.com  Thu May  1 10:07:28 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:07:28 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
Message-ID: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>

Hi all,
Please help me with my stuff.

I downloaded python 2.5.1 package from http://blastwave.org it was
compiled using Sun Studio 11 for Solaris 8 sparc.

My system is Solaris 10 sparc and I compiled using SunStudio 11
psycopg2 python binding for PostgreSQL 8.3.1.

Compilation was OK, but when I am trying to import psycopg2 I am
getting this error:

$ python
Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopg2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
60, in <module>
    from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
referenced symbol not found

Any suggestions or help will be appreciated.


From castironpi at gmail.com  Tue May 13 10:08:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:08:35 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com>
Message-ID: <dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com>

On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
> Giuseppe Ottaviano wrote:
> > def ichain(seq):
> > ????????for s in seq:
> > ????????????????for x in s: yield x
>
> > (which is often useful and I don't think it has been included in ?
> > itertools) you can iterate lazily on the file:
>
> Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> Peter

Can you color the help manual with very fine shades of off-white to
ease reading?  I was thinking a few pixels shy of red of white to
accentuate what are the class methods and which are not.  I also have
an argument that net readability would decrease, but the sample sizes
on that kind of metric are a little brinky with privacy fears around
where I'm from.  I just try to make Tron rings.


From mcknight0219 at gmail.com  Fri May 23 04:38:06 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 01:38:06 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
Message-ID: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>

On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> Jimmy wrote:
> > Hi to all
>
> > python now has grown to a versatile language that can
> > accomplish tasks for many different purposes. However,
> > AFAIK, little is known about its ability of kernel coding.
>
> > So I am wondering if python can do some kernel coding that
> > used to be the private garden of C/C++. For example, can python
> > intercept the input of keyboard on a system level? someone told me
> > it's a kernel thing, isn't it?
>
> http://wiki.python.org/moin/elmer

well, straightly speaking, how can I know a key is pressed on a system-
level if
using python?


From ptmcg at austin.rr.com  Tue May 27 02:37:17 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 26 May 2008 23:37:17 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>

On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian notation, but just for when it's appropriate.

You are likely to get some links to PEP 8 for coding style and naming
conventions, but it turns out PEP 8 doesn't really say yay or nay on
the Hungarian notation topic.

My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
about for "python hungarian notation" led me through some like-minded
sites.  But I also found this entry on Joel Spolky's site (http://
www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
warns against tarring all Hungarian-type notations with the same
brush.

So with that article in mind, I'd have to ask, what do you mean by
"appropriate"?

-- Paul


From xahlee at gmail.com  Sat May 10 01:52:30 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Fri, 9 May 2008 22:52:30 -0700 (PDT)
Subject: implementation for Parsing Expression Grammar?
Message-ID: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>

In the past weeks i've been thinking over the problem on the practical
problems of regex in its matching power. For example, often it can't
be used to match anything of nested nature, even the most simple
nesting. It can't be used to match any simple grammar expressed by
BNF. Some rather very regular and simple languages such as XML, or
even url, email address, are not specified as a regex. (there exist
regex that are pages long that tried to match email address though)

I wrote out a more elaborate account of my thoughts here:
 http://xahlee.org/cmaci/notation/pattern_matching_vs_pattern_spec.html

----------------

After days of researching this problem, looking into parsers and its
theories etc, today i found the answer!!

What i was looking for is called Parsing Expression Grammar (PEG).

See
http://en.wikipedia.org/wiki/Parsing_expression_grammar

It seems to me it's already in Perl6, and there's also a
implementation in Haskell. Is the perl6 PEG is in a usable state?

Thanks.

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From vbgunz at gmail.com  Tue May 13 00:05:29 2008
From: vbgunz at gmail.com (vbgunz)
Date: Mon, 12 May 2008 21:05:29 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
References: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>
	<ef099531-d38a-4b98-b19a-b7f0ac5a5aae@d1g2000hsg.googlegroups.com>
Message-ID: <269346bf-b025-4d73-8a4a-8446946e956d@j22g2000hsf.googlegroups.com>

> I know you're looking for "one-on-one" help, direction, and/or
> tutelage, but since you've not received an answer (yet), here's some
> general info...

> For Decorators, have a gander at:
> ? ?http://www.ddj.com/web-development/184406073;jsessionid=QCNTPTSNXZP2W...
> ? ?http://www.ibm.com/developerworks/linux/library/l-cpdecor.html

I found the first link to decorators a while back. I didn't think much
of it and said to myself, I'd find it again. My googlefu wasn't on my
side this time so I thank you for bringing it to my attention again.
Very very good article. Cleared up some confusion on decorators and I
am much better and sharper at them.

I think what makes the *idea* of a decorator so hard is how *simple*
it really is. From my learning them so far, I know for a fact, I've
encountered situations in which decorators would have saved me from
headache and grief. Now, an excellent piece of ammo for the arsenal.

Lets see if I could explain a decorator in my own words. a decorator
is just a pattern e.g., nothing magical about them except for the
syntactical sugar '@'. The @func sugar is nothing more than a hook
that embeds the following function into the @func first argument
(similar to self or cls) AND then Python *implicitly* reassigns the
original function name to that of the decorator which enclosed it.
From this point out it's pretty much a closure or the wider known
factory function but the real essence of a decorator that can make it
a better closure is how *unobtrusive* it is at modifying a function
*without* actually manually rewriting the original function. Also, the
decorator hook '@' reduces duplication and makes explicit the idea
that a function is to be *decorated*.

I may have some terminology wrong but think I am actually getting the
hang of decorators. very very useful indeed. I have some stuff working
without a hitch though still a bit foggy on passing *args, **etc.
Well, not that I plan on using them for everything but I've already
experienced cases in which I know a decorator would have saved my ass.
Am so glad I took the time out to learn them. I'll learn them again
tomorrow and go over all the links you provided to me.

Larry, thank you for the links, I really appreciate them. If you or
anyone have any tips or more links on some good articles regarding
them, I would surely enjoy seeing them.

Now, class methods. What is one powerful common use case for them?
What is one thing they can do in which could perhaps be the sole
reason for their existence?

heh. I'll get them too :)




From workitharder at gmail.com  Wed May 21 20:21:09 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:21:09 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
Message-ID: <68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>

On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>
> > what are the simple ways?
> > I could think of os.open(), os.exec(touch file)
>
> > are there any simpler methods?
>
> Just use os.path.exists to check for file existence and open() as
> replacement for touch.
>
> >>> import os
> >>> if not os.path.exists('file'):
>
> ...     open('file', 'w').close()
> ...
>
>
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib/

As simple as it gets is a single builtin function call:

open("somefile.txt", "a")

Leave out the ,"a" if you don't mind blanking a pre-existing file.


From papapep at gmail.com  Fri May 30 08:24:57 2008
From: papapep at gmail.com (Josep)
Date: Fri, 30 May 2008 14:24:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
Message-ID: <1212150297.18549.5.camel@awacs>

I'm playing with an application framework (or kinda) that's developed
with python, and it throws this error:


> File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
>     sql = unicode(sql, self.Encoding)
> LookupError: unknown encoding: utf_8_euro

At the application (DABO) mailing list, they have pointed that this has
to be a Python issue. As I'm a totally python newbie, I would ask if
somebody has experimented this kind of error, and if there is any known
solution. I've found no clue searching at Google right now.

My Python version is 2.5.2, Ubuntu Hardy .deb package.

Thanks in advance for your help.

-- 

Josep S?nchez
[papapep]
----------------------------------
http://extralinux.net
----------------------------------
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From bruno.desthuilliers at gmail.com  Wed May  7 18:12:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:12:26 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com> 
	<mailman.716.1210187999.12834.python-list@python.org>
Message-ID: <40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>

On 7 mai, 21:19, Daniel Marcel Eichler <onsen-n... at gmx.net> wrote:
> Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:
>
> > If so, then it looks like an Interface is a generic class with method
> > stubs. You can do that with Python just as easily by creating empty
> > methods with just the "pass" keyword.
>
> Well, no. It's a litte different. Interfaces force to implement methods.
> Simple inheritance with method-stubs can't garantee that a specific
> method is reimplementat in a sub-class.

And Java's "Interface" wart can't garantee that a specific method is
*appropriately* implemented. One often sees do-nothing methods in Java
code - useless boilerplate code that's only here to satisfy the
compiler. It's just like Java's "checked exception" mechanism : one
very often sees do-nothing catch-all try/catch blocks in Java - which
is way worse than just letting the exception propagate. I find all
this totally pointless, because there's just no way for a compiler to
check if your code is logically correct.

> Interfaces work at
> compile-time, while method-stubs raise at their first call, so in worst
> case, never.

And then ? If it's never called, why bother implementing it ?

Here again, I don't see the point of compile-time checking.
RuntimeError is a well-known Java exception, so the fact is that Java
forces you into either rigid designs or overly complex workarounds
(best knowns as "design patterns"), without even being able to
garantee anything wrt/ correctness nor even safety. Not that static
typing by itself is necessarily bad - as usual, there's a balance
between somewhat conflicting goals -, but Java's type system
definitivly is (bad).

(snip)
> That's the point. Interfaces garantee that a duck is a duck, an not only
> a chicken that quack.

Who cares if it's a chicken as long as it quacks when you ask her to ?
Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon May 19 15:53:18 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 19 May 2008 21:53:18 +0200
Subject: Thread output with ncurses
References: <d103c7c3-1e62-4390-ba85-7142b39c9b01@r66g2000hsg.googlegroups.com>
Message-ID: <69e45eF31tjn1U1@mid.individual.net>

blaine wrote:

> The idea would be that the application simply has three 'windows'
> or 'pads' and each thread would output to their respective one. 

I don't know much about ncurses, but I suggest you better use
multiple processes (subprocess module).

Regards,


Bj?rn

-- 
BOFH excuse #434:

Please state the nature of the technical emergency



From arnodel at googlemail.com  Wed May 14 16:44:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 21:44:51 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
Message-ID: <m2od78aa4c.fsf@googlemail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> __new__ is a static method!
>
> __new__ is a special-cased staticmethod that  1/ must not be declared
> as such and 2/ takes the class object as first args. As far as I'm
> concerned, it's semantically a classmethod.

It's a static method!

-- 
Arnaud


From castironpi at gmail.com  Tue May 13 11:28:26 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:28:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <8fb7373c-e8ee-4eeb-9549-d17ac25a1ec6@c65g2000hsa.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

How come no one said lightning?


From sjmachin at lexicon.net  Tue May 13 16:57:09 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 20:57:09 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <Apb*6NNcs@news.chiark.greenend.org.uk>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk>
Message-ID: <482a00a2@news.mel.dft.com.au>

Matthew Woodcraft wrote:
> Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>> I would like to write a similar problem without this non-programming  
>> distracting issues (that is, a problem simple enough to be answered in a  
>> few minutes, that requires only programming skills to be solved, and  
>> leaving out any domain-specific knowledge).
> 
> Another reason not to like the FizzBuzz example is that it's quite
> closely balanced between two reasonable approaches (whether to just
> special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
> add the Fizz and the Buzz together in that case). The interviewee might
> reasonably guess that this distinction is what's being tested, and get
> unnecessarily stressed about it.
> 

For such a trivial problem, fifteen minutes is more than enough to 
present alternative answers. Perhaps the intention is to weed out those 
who do become unnecessarily stressed in such circumstances. Employers 
like to play tricks to see how interviewees respond e.g. hand over two 
pages of a listing of code in language X, announce that there are 10 
syntax errors, and ask the interviewee to find and circle all the syntax 
errors. Correct answer: 11 circles.


From stefan_ml at behnel.de  Sat May 17 11:17:29 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 17 May 2008 17:17:29 +0200
Subject: Getting elements and text with lxml
In-Reply-To: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
Message-ID: <482EF709.3000604@behnel.de>

J. Pablo Fern?ndez wrote:
> I have an XML file that starts with:
> 
> <vortaro>
> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> <kap>
>   <ofc>*</ofc>-<rad>a</rad>
> </kap>
> 
> out of it, I'd like to extract something like (I'm just showing one
> structure, any structure as long as all data is there is fine):
> 
> [("ofc", "*"), "-", ("rad", "a")]

    >>> root = etree.fromstring(xml)
    >>> l = []
    >>> for el in root.iter():    # or root.getiterator()
    ...     l.append((el, el.text))
    ...     l.append(el.text)

or maybe this is enough:

    list(root.itertext())

Stefan


From ma.saeedi at gmail.com  Thu May  8 12:12:57 2008
From: ma.saeedi at gmail.com (Maryam Saeedi)
Date: Thu, 8 May 2008 11:12:57 -0500
Subject: Running a python code periodically
In-Reply-To: <237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
	<237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
Message-ID: <ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>

Can you please explain it a little more? I do not have that much experience!
I really appreciate it if you can share a sample code if you have one.

Thanks

On Thu, May 8, 2008 at 11:07 AM, Amitabh Saikia <saikia at unspokenmind.net>
wrote:

> write a bash script(to run your program at intervals) and run the bash
> script with nohup
>
> - saikia at unspokenmind.net
>
> On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:
>
>> I was wondering if you know how can I run a python code once every five
>> minutes for a period of time either using python or some other program like
>> a bash script.
>>
>> I have asked this question before and some of you answered me but I still
>> have problem. Most of the answers was to use cron and crontab which works on
>> my computer but not if I want to do it on department's computer since I do
>> not have permission to change those files. Is there any other way which does
>> not need administrator permission?
>>
>> Thanks  a lot,
>>
>> Maryam
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>


-- 
Maryam Saeedi
PhD student
Economics Department
University of Minnesota
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From straton at lampsacos.demon.co.uk  Sat May 10 08:14:03 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sat, 10 May 2008 13:14:03 +0100
Subject: Authoring SOAP and WSDL
Message-ID: <g043ie$od9$1$8300dec7@news.demon.co.uk>

I would like to write SOAP services in python,
and have an environment that will then generate
a matching WSDL for me automatically.

Does such a thing exist in python?

Thanks in advance.

Ken.




From caca at mailinator.com  Sat May 31 07:56:17 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Sat, 31 May 2008 04:56:17 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>
Message-ID: <a010c07d-957a-494d-bbde-ece337250dd3@t54g2000hsg.googlegroups.com>

I meant it prints 4, which means the value of test is modified by the
access to the dict

> test=5
> __IPYTHON__.user_ns['test']=4
> print test #prints 4
>



From wuwei23 at gmail.com  Sun May 11 09:50:13 2008
From: wuwei23 at gmail.com (alex23)
Date: Sun, 11 May 2008 06:50:13 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <d5f25cff-bff2-4719-a8e6-4e87970983b7@y22g2000prd.googlegroups.com>

On May 11, 10:54 pm, wxPytho... at gmail.com wrote:
> I thought that just putting a value inside ( )
> would make a tuple. Apparently that is not the case.

It's not the case at all. Check out the Tuples & Sequences section in
the python docs at http://docs.python.org/tut/node7:

"A tuple consists of a number of values separated by commas"

So it's not the parentheses that define it as a tuple, but the comma.

>>> my_tuple = 1,
>>> my_tuple
(1,)
>>> type(my_tuple)
<type 'tuple'>

Hope this helps.

- alex23


From yves at zioup.com  Wed May  7 19:40:26 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Wed, 07 May 2008 23:40:26 GMT
Subject: class definition
Message-ID: <K5rUj.249337$pM4.157639@pd7urf1no>

Does it make a difference if you put subclass object or not ?

What is the difference between c1 and c2 here:

class c1:
   pass

class c2(object):
   pass



Thanks,

Yves.
http://www.SollerS.ca


From alangrow at gmail.com  Sat May 17 15:32:44 2008
From: alangrow at gmail.com (alan)
Date: Sat, 17 May 2008 12:32:44 -0700 (PDT)
Subject: waiting on an event blocks all signals
Message-ID: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>

This ignores CTRL-C on every platform I've tested:

python -c "import threading; threading.Event().wait()"
^C^C^C^C

It looks to me like all signals are masked before entering wait(). Can
someone familiar with the internals explain and/or justify this
behavior? Thanks,

-Alan


From arnodel at googlemail.com  Sun May  4 03:10:40 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 04 May 2008 08:10:40 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <m2myn6lf2n.fsf@googlemail.com>

dave <squareswallower at invalid.com> writes:

> Hello,
>
> I made a function that takes a word list (one word per line, text
> file) and searches for all the words in the list that are 'shifts' of
> eachother.  'abc' shifted 1 is 'bcd'
>
> Please take a look and tell me if this is a viable solution.
>
> def shift(word, amt):
> 	ans = ''
> 	for letter in word:
> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> 	return ans

In Python, if you want to build a string from lots of parts you can
use ''.join(parts).  I think it is considered more efficient.


>
> def fileshift(x):
> 	fin = open(x)
> 	d = {}
> 	for line in fin:
> 		d[line.strip()] = [1]
> 		for i in range(1, 26):
> 			ite = shift(line.strip(), i)
> 			if ite in d:
> 				print ite
>


You could write:

       line = line.strip()

after your for line in fin: statement, rather than strip the line twice.

Let me suggest a different solution base on the str.translate() method

from string import lowercase, maketrans

shifted_lowercase = lowercase[1:] +lowercase[0]
table = string.maketrans(lowercase, shifted_lowercase)

def shift1(line):
    return line.translate(table)

def fileshift(path):
    lines = set()
    for line in open(path):
        lines.add(line)
        for i in xrange(25):
            line = shift1(line)
            if line in lines:
                print line

(untested)

-- 
Arnaud


From ivan.illarionov at gmail.com  Sat May  3 14:04:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 18:04:50 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <fvi9g2$13m6$1@news.mtu.ru>

On Sat, 03 May 2008 18:50:34 +0200, Szabolcs Horv?t wrote:

> I did the following calculation:  Generated a list of a million random
> numbers between 0 and 1, constructed a new list by subtracting the mean
> value from each number, and then calculated the mean again.
> 
> The result should be 0, but of course it will differ from 0 slightly
> because of rounding errors.
> 
> However, I noticed that the simple Python program below gives a result
> of ~ 10^-14, while an equivalent Mathematica program (also using double
> precision) gives a result of ~ 10^-17, i.e. three orders of magnitude
> more precise.
> 
> Here's the program (pardon my style, I'm a newbie/occasional user):
> 
> from random import random
> 
> data = [random() for x in xrange(1000000)]
> 
> mean = sum(data)/len(data)
> print sum(x - mean for x in data)/len(data)
> 
> A little research shows that Mathematica uses a "compensated summation"
> algorithm.  Indeed, using the algorithm described at
> http://en.wikipedia.org/wiki/Kahan_summation_algorithm gives us a result
> around ~ 10^-17:
> 
> def compSum(arr):
>      s = 0.0
>      c = 0.0
>      for x in arr:
>          y = x-c
>          t = s+y
>          c = (t-s) - y
>          s = t
>      return s
> 
> mean = compSum(data)/len(data)
> print compSum(x - mean for x in data)/len(data)
> 
> 
> I thought that it would be very nice if the built-in sum() function used
> this algorithm by default.  Has this been brought up before?  Would this
> have any disadvantages (apart from a slight performance impact, but
> Python is a high-level language anyway ...)?
> 
> Szabolcs Horv?t

Built-in sum should work with everything, not just floats. I think it 
would be useful addition to standard math module. 

If you know C you could write a patch to mathmodule.c and submit it to 
Python devs.

-- 
Ivan


From kyosohma at gmail.com  Mon May 26 17:18:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 26 May 2008 14:18:16 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
Message-ID: <0c2af756-7edb-4cd1-9972-2250090c65ad@m73g2000hsh.googlegroups.com>

On May 26, 2:06?pm, Gandalf <goldn... at gmail.com> wrote:
> I use WX on windows XP and I try to generate an event when the user is
> clicking the keyboard while the application frame is not in focus.
> All I manged to do were while the application frame is in focus
> Can someone please show me how to do it?
>
> Thanks !

You can only catch the keyboard events for whichever widget is in
focus. So, if you have a text control, you'll need to bind to that.
The events you're likely need are EVT_KEYDOWN or EVT_CHAR. You cannot
catch keyboard events with wx if you are using MS Word. For that sort
of thing,you'll have to hook in at the OS level.

Mike


From tjreedy at udel.edu  Tue May 27 02:28:25 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 02:28:25 -0400
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com><ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
	<mailman.1594.1211780280.12834.python-list@python.org><f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9@z16g2000prn.googlegroups.com>
Message-ID: <g1g9m8$ah3$1@ger.gmane.org>


"alex23" <wuwei23 at gmail.com> wrote in message 
news:b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9 at z16g2000prn.googlegroups.com...
| On May 26, 7:21 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
| > But I'd read that Python 3 is very different in many important ways.
| > I read it right there on the Py3K site!  I can't make sense of how,
| > why, even what, exactly, but that's not a misimpression on my part, I
| > certain nonetheless...it's not just cosmetic changes but important
| > ones pertaining to a sort of "linguistic logic" I gather....

One important different for beginners is the elimination of old ways that 
no longer need be learned.  Another is that a few inconsistencies have be 
ironed out.

| Well, let's see what Guido says about the issue:
|
| Q. I want to learn Python. Should I learn Python 2.6 or Python 3.0?
|
| A. Definitely learn Python 2.x (the latest version out is 2.5). I
| expect it'll be two years before you'll need to learn Python 3.0, and
| the differences aren't that great from a beginner's perspective: most
| of what you'll learn about 2.x will still hold about 3.0.
|
| (from http://www.artima.com/weblogs/viewpost.jsp?thread=211200)

My personal view is a little different.  Learn 3.0 unless you have a reason 
to learn 2.x (and there are many possible ;-).  Guido wrote the above 
nearly a year ago, before either existed to be learned.  As it turned out, 
a decision was made to backport most of the new features of 3.0 into 2.6 to 
ease the transition.  Consequently, 2.6 is in some sense the union of 2.5 
and 3.0, so that there is more to learn.  This is not a problem for Guido, 
but I can easily imagine that the extra duplication of function might be 
for a new learner, let alone someone like me who liked Python for its 
relative smallness.  I personally have no perceived need and hence no plans 
to ever touch 2.6.  So, depending on circumstances, again, I might suggest 
2.5 instead of 2.6.

tjr





From dotancohen at gmail.com  Thu May  8 18:56:52 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Fri, 9 May 2008 01:56:52 +0300
Subject: Write a python blog/website?
In-Reply-To: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
Message-ID: <880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>

2008/5/8 sharpshoot <Sumon.Sadhu at gmail.com>:
> Hi Guys,
>
> I thought this would be really interesting to people who blog who
> might be able to help us.

Your proposal very well may be interesting to those who might be able
to help you, yet, you dug your own grave by spamming the Python list.
I see that your intentions were honest, but your post was unsolicited
advertising, and off-topic at that.

I don't 'blog'. I write web content. I have rather impressive traffic
at some sites and your advertising seems to fit at least two or three
medium-traffic sites I maintain. I won't experiment with the
advertising on the large sites until I see results at the smaller ones
first. However, snaptalent.com stands out as a spammer. I most
certainly will not do business with spammers, and I am willing to
sacrifice my bottom line to avoid making spammers richer. That's too
bad, as there are many more effective ways that you could have reached
me and others like me. The two or three fish you will net spamming the
python list will not be worth your bad name, I assure you.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From bignose+hates-spam at benfinney.id.au  Sat May 24 01:01:56 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 15:01:56 +1000
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
Message-ID: <87mymgb8hn.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > Can you tell us exactly which programs you mean when you say "the
> > shell" and "the commandprompt"?
> 
> commandprompt = windows dos-windows
> 
> shell = standard python interactive prompt

Thanks.

Be aware that referring to "the shell" without further qualification
is usually understood to mean "the operating system shell", i.e. the
command shell provided for running operating system commands.

So, you're asking about the difference in behaviour between "the
Windows command shell" versus "the Python interactive shell".

-- 
 \        ?I cannot conceive that anybody will require multiplications |
  `\          at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
_o__)                                                      Wales, 1936 |
Ben Finney


From wizzardx at gmail.com  Sun May  4 08:21:47 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:21:47 +0200
Subject: Script Optimization
In-Reply-To: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
Message-ID: <18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>

On Sun, May 4, 2008 at 4:43 AM, lev <levlozhkin at gmail.com> wrote:
> Can anyone provide some advice/suggestions to make a script more
>  precise/efficient/concise, etc.?

Hi, I started tidying up the script a bit, but there are some parts I
don't understand or look buggy. So I'm forwarding you the version I
have so far. Look for the comments with my e-mail address in them for
more information.

If I have time I'll tidy up the script some more when I have more info
about those issues.

Here are the changes I made to your version:

* Remove newlines introduced by email
* Move imports to start of file
* Change indentation from 8 spaces to 4
* Move main() to bottom of script
* Remove useless "pass" and "return" lines
* Temporarily change broken "chdir" line
* Split lines so they fit into 80 chars
* Add spaces after commas
* Use path.join instead of string interpolation
* rename rename() to rename_md5() because rename() shadows a function
imported from os.
* Rename vars shadowing imported names
* Improve logic for checking when to print help
* Create emtpy md5 listing file if one doesn't exist
* Add a comment for a dodgy-looking section

David.


From info at thegrantinstitute.com  Mon May 19 04:23:07 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 19 May 2008 01:23:07 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Manchester,
	New Hampshire)
Message-ID: <20080519012307.C192D0F458864B79@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080519/4b9d68f8/attachment.html>

From castironpi at gmail.com  Tue May 13 10:01:08 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:01:08 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <6c34f3a3-88fa-4519-b624-34a4589d2424@c65g2000hsa.googlegroups.com>

On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?
>
> Tron! That's one I haven't seen in awhile. I'll have to take a mental
> note to rent the movie again someday. I always thought a game based on
> the movie hackers would be cool. Actually not based on the movie
> itself, but on that 3D computer world they kept breaking into. Ah man,
> it's so funny looking back on that film. Gibson, that's what they
> called it. It was like a 3D database. That in itself wouldn't make a
> very good game, but I suppose one could easily be created around that
> idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> trapped in this 80's looking 3D world that has access to all the
> world's information. More stuff could be thrown in to make it more
> interesting. And of course, there would have to be hidden references
> or parodies to whatever movies inspired it.
>
> Good luck with your project
>
> Sincerely,
> Joshua
>
> On May 13, 9:02?am, castiro... at gmail.com wrote:
>
>
>
> > Hi all.
>
> > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > Now to repeat the subject line. ?I'm stuck in Python.
>
> > Now that was fun. ?I will also try to enumerate simple screen savers
> > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > "overunity", such that one person can't be at liberty to live, which
> > in some technical political arenas would be an "anarchy", but there
> > are sufficiently many of those that I will too.
>
> > Does anyone want such a list, or if not, is it at least fun and
> > recreational to make it? ?The dollar would come along the lines of
> > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > and peaceable. ?(As the above would show, you would be free to
> > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > Guido getting his fair share? ?I am prepared to share with him.)
> > Check in his name.
>
> > I want to try to ally with other programmers and make cool games, like
> > Tron, that one party can make games for on a console, such as live
> > obstacles, incl. tear-down, and certain people have to play from time
> > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > of time. ?Very summer.
>
> > Resemblances would include Dungeons & Dragons with multi-host, or
> > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > attractive (duh). ?As for voice, it's not clear it's the most
> > entertaining, but I just don't have a mic.
>
> > However, forseeing, I return with sailing, but that's in 3-space and
> > not even in code, as though we'd construct the Royal Navy and battle.
> > But I think we can keep it well.
>
> > Thing is, someone has to play it to keep a synch (keep from falling),
> > and tap-outs would have to live.
>
> > Side note: In political theory, this is known as the problem of
> > nominating a successor. ?Would it stay afloat, even for long enough to
> > make it worth the negatives, yes which do include tear-down and fall,
> > invasion of privacy, and rights infrigement?
>
> > I code in Python (get the callbacks), but configurable servers could
> > spread the work out, using relays to put each person on each's own
> > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > c-l-py is the appropriate place to start such a thing, both and ask if
> > it's been done before.- Hide quoted text -
>
> - Show quoted text -

My bot just tries to take control and lead.  (The bot that I'm
writing!)  However, it is amusingly unsuccessful.  We see in lines, so
the game would be pretty primitive, but I'm not sure that everything
else isn't merely too exciting, such that Tron wouldn't be monkey-in-
the-middle, or king of the hill, of fun.  I'm just not on a hill, so
someone else would have to try to play it with me online!


From jamesd at echeque.com  Mon May 19 23:57:26 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 13:57:26 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
Message-ID: <qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>

> > 1.  Looks to me that python will not scale to very large programs,
> > partly because of the lack of static typing, but mostly because there
> > is no distinction between creating a new variable and utilizing an
> > existing variable,

Ben Finney 
> This seems quite a non sequitur. How do you see a connection between
> these properties and "will not scale to large programs"?

The larger the program, the greater the likelihood of inadvertent name
collisions creating rare and irreproducible interactions between
different and supposedly independent parts of the program that each
work fine on their own, and supposedly cannot possibly interact.

> These errors are a small subset of possible errors. If writing a large
> program, an automated testing suite is essential, and can catch far
> more errors than the compiler can hope to catch. If you run a static
> code analyser, you'll be notified of unused names and other simple
> errors that are often caught by static-declaration compilers.

That is handy, but the larger the program, the bigger the problem with
names that are over used, rather than unused.

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From darcy at druid.net  Fri May 16 11:52:14 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 11:52:14 -0400
Subject: Python book question
In-Reply-To: <20080516153116.GF13079@chicago.blisses.org>
References: <20080516153116.GF13079@chicago.blisses.org>
Message-ID: <20080516115214.b166eac5.darcy@druid.net>

On Fri, 16 May 2008 10:31:16 -0500
Matt Herzog <msh at blisses.org> wrote:
> Since Python is the only language that doesn't give me headaches I thought this book might be good. Has anyone read it or can anyone recommend the author? Can anyone recommend a better Data Structures and Algorithms book? 
> 
> The book: http://www.fbeedle.com/053-9.html

I'm not familiar with the book but I poked my head in and looked at the
first example:

def squareroot(n):
    root = n/2
    for k in range(20):
        root = (1.0/2)*(root + (n / root))

    return root

Looks fine and works but I wonder about the "root = n/2" line.  Since
the behaviour of this operation changes in 3.0, shouldn't it be
specific about whether it is doing int or float division?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From arnodel at googlemail.com  Wed May 14 14:45:26 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 19:45:26 +0100
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
Message-ID: <m2wslwafnd.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Hi,
>
> I am reading a file with readlines method of the filepointer object
> returned by the open function. Along with reading the lines, I also
> need to know which line number of the file is read in the loop
> everytime.
> I am sure, the line should have the property/attribute which will say
> the line number of the file.
>
> If there is none, do I have to end up using the counter in the loop?
>
> fp = open("file", "r")
> lineno = 0
> for line in fp.readlines():
> 	print "line number: " + lineno + ": " + line.rstrip()
>         lineno = lineno + 1

The standard Python way is using enumerate()

for i, line in enumerate(fp):
    print "line number: " + lineno + ": " + line.rstrip()

-- 
Arnaud



From duncan.booth at invalid.invalid  Fri May  2 03:54:04 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 07:54:04 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <Xns9A925A80A94Eduncanbooth@127.0.0.1>

Yves Dorfsman <yves at zioup.com> wrote:

> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python
> 
> Why is one preferred over the other one ?
> 
I don't think the answers so far have communicated what I believe to be the 
important point: it isn't that one is always better than the other, it 
depends on what you are trying to achieve.

The first one runs the Python found from the environment. This means you 
can write a script and expect it to run on systems configured differently. 
You might prefer in some cases to specify a particular version of Python:

#!/usr/bin/env python2.5

The second one runs a specific copy of Python (and here it is even more 
likely that you'll want to specify a particular version). This is important 
if your program is being run as a service or some other background 
situation where the environment isn't set up. For example Subversion hooks 
all run with an empty environment, and cron jobs run with a default 
environment which may not include python (e.g. if it is in /usr/local/bin).




From johnjsal at NOSPAMgmail.com  Wed May 14 21:59:43 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 21:59:43 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>

On Mon, 12 May 2008 16:39:25 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

What an interesting and weird language! :) But I have a question concerning something like this, from the website:

----------------------------------------------------
Flaming Thunder uses set statements for assignment:

Set x to "concrete".

Flaming Thunder does not abbreviate or cojoin common English words. For example, go and to are separate words:

Read commmand.  If command = "quit" then go to end.
-----------------------------------------------------

There doesn't seem to be any consistency here. Why say:

set x to "concrete"

and then say:

if command = "quit"

Why are you using the "set...to..." terminology instead of the "=" for assignments, but then in an if test statement, you *do* use the "="???

Would it be valid to say:

x = "concrete"

or to say:

if command (is) set to "quit"

??????


From ark at acm.org  Thu May  8 12:33:19 2008
From: ark at acm.org (Andrew Koenig)
Date: Thu, 08 May 2008 16:33:19 GMT
Subject: Given a string - execute a function by the same name
References: <mailman.291.1209400412.12834.python-list@python.org>
Message-ID: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>

<python at bdurham.com> wrote in message 
news:mailman.291.1209400412.12834.python-list at python.org...

> I'm parsing a simple file and given a line's keyword, would like to call
> the equivalently named function.

No, actually, you woudn't :-)  Doing so means that if your programs input 
specification ever changes, you have to rename all of the relevant 
functions.  Moreover, it leaves open the possibility that you might wind up 
calling a function you didn't intend.

The right way to solve this kind of problem is to list all the functions you 
wish to be able to call in this way, and then explicitly define a mapping 
from keywords to the appropriate functions.  Which is exactly what you're 
doing in

> 3. Place all my functions in dictionary and lookup the function to be 
> called




From squareswallower at y1a2hoo3.com  Sat May  3 16:29:10 2008
From: squareswallower at y1a2hoo3.com (dave)
Date: Sat, 3 May 2008 14:29:10 -0600
Subject: dict invert - learning question
Message-ID: <fvihum$em7$1@news.xmission.com>

Hello,

here is a piece of code I wrote to check the frequency of values and 
switch them around to keys in a new dictionary.  Just to measure how 
many times a certain key occurs:

def invert(d):
	inv = {}
	for key in d:
		val = d[key]
		if val not in inv:
			inv.setdefault(val, [key])
		else:
			inv[val].append(key)
	return inv


Using the methods above (I'm just a beginner) could I have written it 
more concisely?  Any criticism/critique in the code would be greatly 
appreciated.

Many Thanks,

dave



From yguan08 at gmail.com  Tue May 13 17:06:13 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 14:06:13 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<m263tiapzt.fsf@googlemail.com>
Message-ID: <fac0145c-d4c1-4faa-84b9-033b74047b0a@56g2000hsm.googlegroups.com>

On May 13, 3:49?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> ygua... at gmail.com writes:
> > I have trouble of obtaining the file size of a file because the
> > fullpath exceeds 255 characters. I get this message with
> > os.path.getsize(fullpath).
>
> > fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> > \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> > \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> > \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> > Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> > fsize = os.path.getsize(fullpath)
>
> > WindowsError: [Error 206] The filename or extension is too long:
>
> > The same thing with os.stat(fullpath).
>
> > I tried using the relative path, but it does not work with the message
> > fname not found.
>
> > dir = os.path.dirname(fullpath)
> > fname = os.path.basename(fullpath)
> > os.chdir(dir)
> > filesize = os.path.getsize(fname)
>
> > Is there a walk around of this?
>
> Disclaimer: I am not a Windows user
>
> Might this help? ?http://forum.altap.cz/viewtopic.php?p=2353
>
> Alternately, use a better OS :-)
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -

I tried, but still the same error:

WindowsError: [Error 206] The filename or extension is too long: '\\\\?
\\UNC\\LOSSSFS002\\NWE_TECHNICAL\\05. UK\\Schiehallion (204_25a)\
\Amos&Burke_P559\\07. Technical (Subsurface)\\06. Well Planning\\Amos\
\Daily Reports\\Wireline\\final_204_25a_8z\\204_25a_8z\\Run_1A\
\HRLA_SP_DSI_PEX_HNGS_ECRD\\ANCILLARY\\Amos_204_25a-8Z_GR_to_surface_3-
Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las'


From tjreedy at udel.edu  Tue May 27 19:10:59 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 19:10:59 -0400
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com><m2wslf4haq.fsf@googlemail.com>
	<Kq__j.177027$ng7.15947@en-nntp-05.dc1.easynews.com>
Message-ID: <g1i4e1$26f$1@ger.gmane.org>


"Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message 
news:Kq__j.177027$ng7.15947 at en-nntp-05.dc1.easynews.com...
| Sounds good to me.  I take it that, if I don't inherit from Exception, 
various
| expected behaviors will break?  (This is what Beazley suggests...)

All builtin exceptions have been in the builtin namespace for a while.  The 
duplicate exceptions module is gone in 3.0,  In 3.0, if not before, all 
exceptions must subclass from one of the builtin exceptions.  Exception is 
the usual choice.

tjr







From denis.kasak2718281828 at gmail.com  Sun May 25 19:28:52 2008
From: denis.kasak2718281828 at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 01:28:52 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
	<mailman.1583.1211754595.12834.python-list@python.org>
	<W72dnaRymtZIcKTVnZ2dnUVZ_jydnZ2d@pdx.net>
Message-ID: <g1csnk$vtn$1@aioe.org>

Scott David Daniels wrote:
> Denis Kasak wrote:
> ...
>>>>> spam = []
>>>>> for i in range(10):
>> ...   spam.append(lambda: i)
>>>>> spam[0]()
>> 9
>>>>> spam[1]()
>> 9
>>
>> Manually creating the lambdas and appending them to a list works as
>> expected, naturally; I don't see a good reason why it wouldn't work
>> with a loop. Am I missing something?
> 
> Yes, you are missing something: binding time.  your anonymous function
> returns the value of "i" in the enclosing scope _at_the_time_of_
> _the function's_execution_.  If you follow your previous example with
> 'del i' and then execute any of your spam functions, you'll get an
> "NameError: global name 'i' is not defined".

Ah, the problem was in the subtle misunderstanding of the semantics of 
lambda functions on my part. It's much clearer now. Thanks.

> There are a couple of ways to slve your problem:
> (1) use default args to do the binding at the function definition time.
>     for i in range(10):
>         spam.append(lambda arg=i: arg)
> The lambda expression is normally spelled "lambda i=i: i)", but if you
> don't know the idiom, I find the "i=i" part confuses people.

Indeed. It hasn't occured to me that lambdas could bind the variables 
inside them by name. I guess my lambdas are still a little shaky. :-)

-- 
Denis Kasak


From myshoesbiz89 at yahoo.com.cn  Sat May  3 01:56:36 2008
From: myshoesbiz89 at yahoo.com.cn (myshoesbiz89 at yahoo.com.cn)
Date: Fri, 2 May 2008 22:56:36 -0700 (PDT)
Subject: CHINA WHOLESALE GUCCI DIOR CHANEL HANDBAGS FROM CHINA SUPPLIERS
Message-ID: <debe7937-6108-428f-b043-8305a5ed2796@s33g2000pri.googlegroups.com>


Thenikeshoes DOT net

If you are interested in any of our products, please contact our
salesman and they will respond in 24 hours after hearing from you. If
you cannot find the shoes you are seeking for in the list, please also
contact with us and send us your photos, we will do our best to find
the shoes from our partners and satisfy you with our best service.

Our main customers are from Europe and North America and we know well
about the requirements for those markets, such as style number,
sticker and box details. We sincerely hope to establish beneficial
partnership with your valued company


From irmen.NOSPAM at xs4all.nl  Sun May 18 20:52:10 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 02:52:10 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4830cf3b$0$14348$e4fe514c@news.xs4all.nl>


John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I
> think of something I might do in Python, it usually involves creating a GUI
> interface, so I was wondering what kind of work you all do with Python that does
> *not* involve any GUI work. This could be any little scripts you write for your own
> benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.

- web server/blog/wiki. This doesn't have a gui if you don't consider HTML pages a gui
- various scripts to help me during software deployment and testing
   (for instance log file analyzers, automated web clients)
- network communications library that tries hard to just get out of your way ;-)
- file processing scripts to do more sophisticated stuff than basic search/replace
- most recent script is a little tool that downloads the latest version of some 
World-Of-Warcraft addon, extracts it to the game folder after deleting the old one 
first, and then copies a backup to a network drive. I just doubleclick the .py file and 
it dumps the results in a console window that closes after a few seconds. Who needs a 
gui for that?

Also, I often find myself opening a Python prompt to just execute simple tasks that I 
see other people needing big tools or even online services for:
- base-64 encoding/decoding
- md5/sha hashing
- simple string or regular expression operations
- simple math
- unicode decoding/encoding
- etc etc.


--irmen de jong


From n00m at narod.ru  Mon May  5 06:46:33 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 03:46:33 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <b0777ae1-aa85-4257-8c03-de164442cb11@m73g2000hsh.googlegroups.com>

Hint:
for some reason in VBScript it works fine.
What makes it different, with Python?
I tried all possible ways to combine quotes, ' and ",
with no avail


From zzvladimir at gmail.com  Wed May 21 03:14:22 2008
From: zzvladimir at gmail.com (Vladimir Kropylev)
Date: Wed, 21 May 2008 11:14:22 +0400
Subject: xpath with big files
Message-ID: <fbe1c7d70805210014l1f628e99rd5953c95e1ba43ed@mail.gmail.com>

Hi,
I've encountered a problem when trying to use lxml.etree.xpath with
big (63Mb) file. It returns empty list on any request.
Is there any restriction on file size for lxml.etree.xpath?

This is what I do:

f=open(filename)
tree = etree.parse(f)
f.close()
r = tree.xpath('//image')
print(r)

it prints:
[]

What is wrong here?


From exarkun at divmod.com  Mon May 12 13:16:29 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 13:16:29 -0400
Subject: Socket and cycle problem
In-Reply-To: <ede112da-da8e-413f-8f03-8e9edb4e6323@d77g2000hsb.googlegroups.com>
Message-ID: <20080512171629.6859.799802490.divmod.quotient.62544@ohm>

On Mon, 12 May 2008 09:19:48 -0700 (PDT), petr.poupa at gmail.com wrote:
>
> [snip]
>>
>> >Where is the mistake? I dont know.
>>
>> You cannot reconnect a socket.  You need to create a new one for each
>> connection.  It's also almost certainly the case that the way you are
>> receiving data is incorrect.  There is no guarantee that you will get
>> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
>> the bytes written to the socket by the peer will be returned by such
>> a call.  Instead, you need a framing protocol to determine when all
>> data has been received.  For example, you might length prefix the
>> data, or you might insert a delimiter (or a terminator) at the end.  Or
>> if there is exactly one message to receive, then you should just read
>> until the recv call returns '', indicating EOF.
>>
>> Jean-Paul
>
>ok thanks, but I am true greenhorn, so you think that the best way is
>write new script?
>Could you send me code if it isnt long, becase I have no idea and
>unfortunately time as well.
>

I'm not sure what you want to happen, so I can't write it for you.  I
suggest you start with Twisted instead of the socket module, though,
as Twisted provides a higher-level interface to network programming.

You can find some introductory documentation about writing clients here:

  http://twistedmatrix.com/projects/core/documentation/howto/clients.html

Jean-Paul


From giles_brown at hotmail.com  Tue May  6 11:44:36 2008
From: giles_brown at hotmail.com (Giles Brown)
Date: Tue, 6 May 2008 08:44:36 -0700 (PDT)
Subject: select.poll() and WSAPoll
References: <mailman.650.1210079955.12834.python-list@python.org>
Message-ID: <ef9a170d-5b87-4ec0-9d7d-67b8d1057083@t54g2000hsg.googlegroups.com>

On 6 May, 14:18, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 6 May 2008 08:36:28 -0400, inhahe <inh... at gmail.com> wrote:
> >select.poll isn't supported on Windows, because Windows doesn't have such a
> >feature, or at least it didn't until Vista.  Vista implements the same thing
> >but called  WSAPoll, an article is here
> >http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
> >I hope that the next edition of Python supports select.poll on Vista, or at
> >least that someone writes a third-party module fo it. As much as I'd love to
> >do it myself, it's probably beyond me.. i've never used poll before nor
> >written a Python extension.  also, i don't have Vista.
> >Thanks
>
> If you use Twisted, then you can use I/O Completion Ports, which are even
> better than WSAPoll, and your code will also work with KQueue on BSD or
> EPoll on Linux without any changes. :)
>
> Jean-Paul

The current docs describe the I/O Completion Ports reactor as
"extremely experimental".

http://twistedmatrix.com/projects/core/documentation/howto/choosing-reactor.html#auto8

Is that overly conservative or is it as bleeding edge as it sounds?

(IIRC there have been caveats like this on the Windows reactors for
a while)

Giles


From zerge69 at gmail.com  Sun May 25 20:21:14 2008
From: zerge69 at gmail.com (Zerge)
Date: Sun, 25 May 2008 17:21:14 -0700 (PDT)
Subject: Pinging a machine from python
References: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>
Message-ID: <0abad6b7-87bc-42d2-88ee-1f2ed40aa07f@w1g2000prd.googlegroups.com>

On May 25, 11:13 am, Prasanth <prasanth... at gmail.com> wrote:
> I tried pinging a machine from python using socket programming but
> could not do it. Is there any module which we can use to ping the
> machine < like net::ping in perl> or can you give me simple program.

Import OS
ip=192.168.1.1
pingtext="ping "+ip+" -n 1"
pingresult=os.popen(pingtext).readlines()

"OS" gives you access to the command line of the operating system.


From nick at craig-wood.com  Fri May 23 16:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 15:30:09 -0500
Subject: Advice from senior Members
References: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>
Message-ID: <slrng3e789.dgr.nick@irishsea.home.craig-wood.com>

flit <superflit at gmail.com> wrote:
>  I am looking for some experience from the senior members.
>  Now I am doing a simple desktop application, this application will
>  have 3 main functions:
> 
>  1- Read information about the desktop system;
>  2- Interact with the user;
>  3- Send information to a server.
> 
>  The first part, reading information about the desktop system, is
>  already done.  And now I am starting to make the gui for the user,
>  that is when the question appear: "What is the best way to make it?
>  divide in files? by classes or functions?"  I have now one big file
>  with all functions to get the desktop information.  Should I make
>  one file for the visual functions (wxpython)? another for the
>  server?  Is productive to divide in files? what is the best way?

I would divide it into 3 files, one for the desktop info, one for the
server interaction and one for the GUI.  Subdivide the files if they
start getting unmanageably long

My wx programs tend to be full of lots of little classes.  I make
every object (pane, window, widget etc) its own class and glue them
all together in other classes.

I'd make your read the information file into probably a single class,
with each function a method.  You can then either read all the
information on __init__ or as methods whichever seems best to you.
Your gui classes will then query this as appropriate (this is the MVC
as discussed by another poster).

You can write another text mode interface for the desktop info module
which prints things out in text format for testing.

Once you've divided your program up, you can start thinking about unit
tests.  You can certainly unit test your desktop info gathering, and
your server interaction.  It is hard to write tests for wx GUIs though
(but not impossible).

When you've finished you'll have 3 files full of classes.  You may
have a few utility functions too.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From ian at excess.org  Mon May 19 09:50:49 2008
From: ian at excess.org (Ian Ward)
Date: Mon, 19 May 2008 09:50:49 -0400
Subject: ANN: Urwid 0.9.8.2 - Console UI Library
Message-ID: <483185B9.9030307@excess.org>

Announcing Urwid 0.9.8.2
------------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.8.2.tar.gz

RSS:
   http://excess.org/feeds/tag/urwid/


About this release:
===================

This is a maintenance release that fixes a number of bugs that have been
found in 0.9.8.1.


New in this release:
====================

  * Fixed incompatibilities with Python 2.3

  * Fixed Pile cursor pref_col bug, WidgetWrap rows caching bug, Button
    mouse_event with no callback bug, Filler body bug triggered by the
    tutorial and a LineBox lline parameter typo.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.








From arnodel at googlemail.com  Wed May  7 14:27:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:27:29 +0100
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <m2fxsu55ri.fsf@googlemail.com>

umpsumps at gmail.com writes:

> Hello,
>
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..
>
> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res
>
> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1
> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]
>
> thanks much!!

I won't comment on the algorithm, but I think you should try to find
better names for your variables.  In the snippet above you have x,
res, dic, newd, length, getvals which don't give much of a clue as to
what they are used for.

e.g.

* dic = {}
We know it's a dict, but a dict of what?

* newd = dic.items()
Sounds like 'new dictionary', but obviously isn'tas it is a list 
of key,value pairs.

* length = len(getvals)
Again, we know it's a length, but the length of what?

HTH

-- 
Arnaud


From castironpi at gmail.com  Tue May 13 09:55:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:55:41 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
	<3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>
Message-ID: <529f1c1f-9ab6-41a4-88f8-7f54d8528f00@d1g2000hsg.googlegroups.com>

On May 13, 8:23?am, gsal <salger... at gmail.com> wrote:
> hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
> the packages I was using because they were in the "egg" form. ?I was
> hoping Installer could...then again, I don't know how long ago
> Installer was written and whether eggs came along after that...
>
> Regarding the word 'copy'...will you please enlighten me? were you
> serious? is it really banned (around here)? I mean, I thought we were
> talking about an open application which, for as long as you pass along
> the (GNU,GPL) license, you are allowed to provide it to other people.
>
> So, then, allow me to ask the real question: ?how do I go about
> deploying a Python application to somebody who has nothing (python nor
> related modules) where my application uses modules from Lib/site-
> packages that are in "egg" form?
>
> Regards,
>
> gsal

Funny you should ask that way; this is strictly speaking, real aside.

If people like to share, but don't know what enough is, (or when,)
real world problems can sometimes arise.  And it's not as easy as
asking an authority to see for yourself.  There are all kinds of power
structures and big sleeping men lying about.  They're big and
sleeping, just men.

Plagiarism (sp.) is a form of copying-- my professors have always
resented and penalized quoting right from the book.  I continue, if
the book's wording is the best way to say certain things (which would
be so popular as to be indistinguishable from analytic/necessary, i.e.
math), the study is rote, and the creation lies about.  But is math in
creation?  I might hold so.  One test even emphasizes, "in your own
words."

But the power structures are men, and men are living; what does life
want?  What will man try to do in and over time?  What are the
universe's poles/attractors/pulls?  What has he done before?  Is there
any money in any logical, cross-sectional isolation of them?  As it's
my belief that man can have too much money, what if you succeed in
trying to make it in the foregoing way?



From mmanns at gmx.net  Tue May 13 14:31:45 2008
From: mmanns at gmx.net (Martin Manns)
Date: Tue, 13 May 2008 20:31:45 +0200
Subject: ANN: pyspread 0.0.6
References: <mailman.1032.1210668518.12834.python-announce-list@python.org>
Message-ID: <mailman.1069.1210705174.12834.python-announce-list@python.org>

On Tue, 13 May 2008 00:23:12 +0200
Martin Manns <mmanns at gmx.net> wrote:

pyspread 0.0.5 has been released.
It is a bugfix release for Mac and Windows.

> --
> 
> About: 
> pyspread is a spreadsheet that accepts a pure python expression in
> each cell.
> 
> --
> 
> Highlights:
> + No non-python syntax add-ons
> + Access to python modules from cells
> + 3D grid
> + Numpy object array for representation of string entry into grid cell
> + Numpy object array for representation of eval function array
> + Cell access via slicing of numpy function array
> + X, Y, and Z yield current cell location for relative reference
> 
> Requires: Python >=2.4, Numpy 1.0.4, and wxPython 2.8.7.1.
> License: GPL
> 
> Project page: http://pyspread.sourceforge.net
 
Best Regards

Martin





From larzluv at hotmail.com  Mon May 12 00:42:55 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 21:42:55 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
Message-ID: <d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>

THANKS, AGAIN, for the reply!  :)

Okay, now I -really- feel silly...  :>

So, when I was going to try what you'd suggested, I noticed something
peculiar: I hadn't "changed" anything on my system, but now, when I
tried to "import magic" I got a missing DLL error.  For a DIFFERENT
DLL!  This got me to thinking...

Turns out, when I was having "success" earlier, I was -in- the C:
\Program Files\GnuWin32\bin directory (where file.exe and related .dll
files are).

So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
PATH.  Everything worked.  I removed all the copious copies of the
DLL, the magic files, etc., littering my hard drive in every other
location.  Still worked.

'Course, I don't honestly know why it didn't work with the files
copied to other locales contained in the sys/Py paths... perhaps it
was, as you mentioned, wanting the tree-structure to be the same?  (I
haven't the heart to check this out fully right now... *maybe* at a
later time...  ;) )

Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
THAT... you know, all the "obvious"/"I've been programming/working in
computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
'hacker'..." stuff.  I -swear-!

[EGG ON FACE]

[SIGH]  Well, I'd say "live and learn", but I'm still scratching my
head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
off to work _with_ the module now, then work-up my HowTo (and
experiment with making an "egg"?? ;) )...


Caio!
-Larry  :P  :)



On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
> Larry Hale wrote:
> > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > file... still no-go.  :/
>
> It's often the custom of programs ported from unix to windows to use the
> dll location as a key to find the other files that are typically in
> share, or etc.  GTK, for example uses ../share and ../etc from the
> location where the dlls are stored (if the dlls are in a folder called bin).
>
> In this case I'd try making a folder in the Python25 folder called
> "share" and put the contents of the gnuwin32 share/file stuff in there.
>  Should look something like this:
>
> c:/python25/share/file/magic.mime.mgc
> c:/python25/share/file/magic
> c:/python25/share/file/magic.mgc
> c:/python25/share/file/magic.mime
>
> Or, judging by a string I found in the dll itself, you might have to put
> the files here:
>
> c:/progra~1/File/share/file/magic
>
> Although if such a path really is hardcoded into the dll, this is
> certainly a bug, since it will fail on certain non-english windows systems.
>
> Anyway, who knows.  Give these options a try.



From prabaindra at gmail.com  Thu May  1 09:11:47 2008
From: prabaindra at gmail.com (prabaindra at gmail.com)
Date: Thu, 1 May 2008 06:11:47 -0700 (PDT)
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
Message-ID: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>


                    HELLO FRIEND IAM SHALINI,

                                        DO U WANT TO KNOW ABOUT
SCIENTOLOGY?

                                             PLS LOOK AT THE BELOW
WEBSITE.

                                                 www.bigconcern3.blogspot.com


From torriem at gmail.com  Mon May 12 08:48:12 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 12 May 2008 06:48:12 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <4827C2E7.2040703@gmail.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
	<4827C2E7.2040703@gmail.com>
Message-ID: <48283C8C.9040804@gmail.com>

Michael Torrie wrote:
> In this case I'd try making a folder in the Python25 folder called
> "share" and put the contents of the gnuwin32 share/file stuff in there.
>  Should look something like this:
> 
> c:/python25/share/file/magic.mime.mgc
> c:/python25/share/file/magic
> c:/python25/share/file/magic.mgc
> c:/python25/share/file/magic.mime

I used linux's strace command to trace the file calls of file.exe via
wine (fun!) and verified that magic1.dll indeed will first in
c:/progra~1/File/share/file/magic and then in ../share/file


From ivo.talvet at gmail.com  Mon May 12 07:07:04 2008
From: ivo.talvet at gmail.com (ivo talvet)
Date: Mon, 12 May 2008 13:07:04 +0200
Subject: python without while and other "explosive" statements
In-Reply-To: <4827A364.9040507@mattnordhoff.com>
References: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
	<4827A364.9040507@mattnordhoff.com>
Message-ID: <3dd0b1a30805120407w407c9bbdr6439f4a89bc4df84@mail.gmail.com>

thanks for the tips, pam limits and http://codepad.org/ are both
interesting tracks.

Ivo

2008/5/12 Matt Nordhoff <mnordhoff at mattnordhoff.com>:
>
> ivo talvet wrote:
>  > Hello,
>  >
>  > Is it possible to have a python which not handle the execution of
>  > "while", "for", and other loop statements ? I would like to allow
>  > remote execution of python on a public irc channel, so i'm looking for
>  > techniques which would do so people won't be able to crash my computer
>  > (while 1: os.fork(1)), or at least won't won't freeze my python in a
>  > infinite loop, make it unresponsive. Is there a compiling option (or
>  > better, something i can get with apt-get cos i think compiling myself
>  > and handle all the metastuff myself is somehow dirty) for have a
>  > "secure python" (you can guess what i mean by "secure" in my case) or
>  > must i touch myself the source disable some code lines ? If last
>  > solution, which modifications in which files should i do ? (sorry for
>  > my bad english)
>  >
>  > Thanks.
>  >
>  > Ivo
>
>  <http://codepad.org/> is a pastebin-like website that lets people upload
>  code in a dozen different languages, and it runs it. They have info up
>  about how it's secure at <http://codepad.org/about>.
>
>  I'm pretty sure there's another similar website that's specific to
>  Python, but I can't remember it. Anyway, it was similar, using virtual
>  machines, a firewall, and killing stuff that ran for longer than 20
>  seconds, IIRC.
>
>  (Thanks for the link to codepad, habnabit.)
>  --
>


From gneuner2/ at /comcast.net  Thu May  8 21:32:58 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Thu, 08 May 2008 21:32:58 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <l097249qdplrlq17jctfthbooqdlgol85e@4ax.com>

On Thu, 08 May 2008 03:25:54 -0700,
usenet1.3.CalRobert at SpamGourmet.Com (Robert Maas,
http://tinyurl.com/uh3t) wrote:

>> From: "xah... at gmail.com" <xah... at gmail.com>
>> the importance of naming of functions.
>
>> ... [take] a keyword and ask a wide
>> audience, who doesn't know about the language or even unfamiliar of
>> computer programing, to guess what it means.

This is a dumb idea ...

>Better would be to reverse the question: Ask
>random people on the street what they would like to call these
>concepts:

... and this one is even dumber.

Terms don't exist in a vacuum - they exist to facilitate communication
within a particular knowledge or skill domain.  For example, English
is only meaningful to those who speak English.  The opinions of random
people who have no relevant domain knowledge are worthless.

Such a survey could only be meaningful if the survey population
already possessed some knowledge of programming, but were not already
aware of the particular terminology being surveyed.

George
--
for email reply remove "/" from address


From boblatest at googlemail.com  Wed May 21 09:12:13 2008
From: boblatest at googlemail.com (boblatest at googlemail.com)
Date: Wed, 21 May 2008 06:12:13 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
Message-ID: <7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>

On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:

> Although that solution is pretty, it is not the canonical solution
> because it doesn't cover the important case of "if" bodies needing to
> access common variables in the enclosing scope.  (This will be easier
> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
> IMHO closer to a canonical solution to this FAQ.

Hello everybody,

thanks for the various answers. I'm actually pretty puzzled because I
expected to see some obvious solution that I just hadn't found before.
In general I find Python more elegant and syntactically richer than C
(that's where I come from), so I didn't expect the solutions to be a
lot more verbose and/or ugly (no offense) than the original idea which
would have worked if Python's assignment statement would double as
expression, as in C.

Thanks again,
robert

PS: Since I'm testing only three REs, and I only need the match
results from one of them, I just re-evaluate that one.


From pavlovevidence at gmail.com  Mon May 12 14:23:07 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 12 May 2008 11:23:07 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
Message-ID: <efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>

On May 12, 3:42 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Because of the precedent of those names, choosing one of those names
> doesn't make it clear to the reader that the value is never used;


Why is it even necessary to document this?  This is the thing that
baffles me the most about this thread.

Think about all the various aspect of a varibale:

* is it some common usage archetype
* value it represents
* scope
* (expected) type
* physical units of measure
* software package it belongs to
* whether it's used in the program or not
* scalar, structure, or array
* mutable or constant
* and so on

You cannot possibly document all of this pertinent information in the
name alone.  A variable's name is a very limited resource: one can
only document a tiny number of things, so one must prioritize.

IMHO, whether a varibale is used or not has got to be one of the least
important things of all (in no small part because it's easily
discernable from nearby code).  In fact, I'd say it's so irrelevant I
probably wouldn't have listed it if it wasn't the topic of discussion.

The first two items I listed are the most important to me.  If a
variable fills the archetypal role of counter, then it ought to be
named like a counter; this usually trumps all other concerns.  (Never
mind that the varibale here isn't really a counter, it still fills the
archetypal role of one, which is more important.  The name of a
variable is for the reader's benefit.)  So I would have to agree with
Ivan Illarionov.

Having said that, if you do think it's most important to document
whether something is used, I would suggest not using "_" (because it's
conflicts with gettext conventions) or "dummy" (because it's
misleading) for it.


Carl Banks


From gherron at islandtraining.com  Sun May 11 13:51:34 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 10:51:34 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <WLFVj.32499$KJ1.2751@newsfe19.lga>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <48273226.8060405@islandtraining.com>

bc90021 wrote:
> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>   

I don't believe you.  I think you have something like

    g = open('fileName', 'a')

instead of (as you claim)

    g = open(fileName, 'a')

Do you see the difference?  

Develop the skill of reading the error messages *very* carefully.  Your error says there is no file named "fileName", and if you think about what's on your disk, I'll bet you won't find a file whose name is "fileName".


Gary Herron



> where fileName is defined before the line it's used in.  It works fine 
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get 
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>
> Are threads not allowed to create files?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From wizzardx at gmail.com  Sun May  4 09:18:50 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 15:18:50 +0200
Subject: please remove me from this list
In-Reply-To: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>
References: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>
Message-ID: <18c1e6480805040618p14c27164r362584d0ad5f2259@mail.gmail.com>

On Sun, May 4, 2008 at 2:48 PM, Vladimir Kropylev <zzvladimir at gmail.com> wrote:
> please remove me from this list, thanks
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>

Follow that link (http://mail.python.org/mailman/listinfo/python-list)
and see the "Python-list Subscribers" section.

David.


From matthieu.brucher at gmail.com  Wed May 21 08:32:47 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Wed, 21 May 2008 14:32:47 +0200
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <e76aa17f0805210532mb2accd3p63bfaa01cf937a3f@mail.gmail.com>

>
> This is all true if you want to operate in "native" mode; however in
> "standard" mode the sizes are fixed -- otherwise there'd be no easy way of
> reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required for
> any type (so you have to use pad bytes); short is 2 bytes; int and long are
> 4 bytes; long long (__int64 on Windows) is 8 bytes; float and double are
> 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a
> long-established PC file format, he will need to '<' for littleendian order,
> and an appropriate selection from bBhHiI and d will do what he needs.
>
> HTH,
> John


On an Ubuntu 64 box :

>>> struct.calcsize('l')
8

not 4.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From pecora at anvil.nrl.navy.mil  Fri May  9 11:23:42 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 May 2008 11:23:42 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
Message-ID: <pecora-DFE713.11234209052008@ra.nrl.navy.mil>

In article <mailman.825.1210293599.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message 
> news:200805081914.06459.kyrie at uh.cu...
> | Btw, there seems to be a math problem in python with exponentiation...
> | >>> 0**0
> | 1
> | That 0^0 should be a nan or exception, I guess, but not 1.
> 
> a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
> But there are unenlighted people who agree with you ;-)
> Wikipedia has a discussion of this.
> 
> tjr

I like that argument better.  But...

I've also heard the very similar a**b is a multiplied by a b-1 times.  
That gives 0**0=0*(1/0).  Uh, Oh!  If you want consistency with the 
treatment of exponents that might cause problems.  Tough situation when 
you have a "discontinuity" at 0 for x^x.

-- 
-- Lou Pecora


From castironpi at gmail.com  Wed May 14 14:06:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:06:31 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com>
Message-ID: <0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>

On May 14, 1:02?pm, castiro... at gmail.com wrote:
> On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > you can safely ignore its posts.
>
> > > > > > How does it generate text?
>
> > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > However you know what would be helpful? ?If I could go to the right
> > > > place to start the ring.
>
> > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > I'd stay on mutability for the world domination factor. ?Fluent
> > currency is buoyant currency; turn on a local clock, and someone gets
> > some cubic verticals.
>
> > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > can pretty well win work.- Hide quoted text -
>
> > - Show quoted text -
>
> I have a self-referential on Pygame: it's a Hand Tool object.
> Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> - Show quoted text -

If Python can plot in to chess, and Tron rings live, then why not
group it knew?


From collinyeung at shaw.ca  Mon May 12 00:54:28 2008
From: collinyeung at shaw.ca (Collin)
Date: Mon, 12 May 2008 04:54:28 GMT
Subject: Accepting text input
In-Reply-To: <72QVj.262833$pM4.115744@pd7urf1no>
References: <72QVj.262833$pM4.115744@pd7urf1no>
Message-ID: <84QVj.133083$rd2.94188@pd7urf3no>

Collin wrote:
> I'm pretty new to Python, but this has really bugged me. I can't find a 
> way around it.
> 
> 
> The problem is that, when I use raw_input("sajfasjdf") whatever, or 
> input("dsjfadsjfa"), you can only have numerical values as answers.
> 
> Any help would be appreciated. Thanks.


Oh, wow. I feel so stupid. Please disregard this message. <_<

I read the error message just now a bit more carefully, and I tried 
something. I tried defining "yes" as some random numerical value. Then 
when I did:
(example code)

yes = 123123983 #some number
test = input("Test test test ")
if test == yes:
	print "It worked."
else:
	print "failed"

(example code off)

Collin


From banibrata.dutta at gmail.com  Tue May  6 10:21:15 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 19:51:15 +0530
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
Message-ID: <3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>

Many not be the most intuitive and elegant solution (I'm just a Python
newbie), but if your Python code is constrained to the usage of Python 2.2
language features, you could use Jython, and then (I'm hoping, since I've
not tried this myself), use the Java Memory usage profiling/debugging tools.

Would be really interested to know the answer to the question, i.e. if there
are any CPython solutions.

On Tue, May 6, 2008 at 6:57 PM, David <wizzardx at gmail.com> wrote:

> Hi list.
>
> I've tried Googling for this and I checked the Python docs, but to no
> avail.
>
> What is the best way to debug memory usage in a Python script?
>
> I'd like to see what objects are using the most memory. Ideally this
> would be aware of references too. So if I have a small list that
> contains (references rather) some large variables, then I could see
> that the global list variable was responsible for X MB that couldn't
> be collected by the garbage collector.
>
> It would be nice if it could be used in a similar way to the 'du'
> Linux command. eg:
>
> eg output:
>
> >>> mem_debugger.pretty_print()
> A (type: list): 8 bytes, 10MB
>  - a (type: string): 6 MB, 0 bytes
>  - b (type: string): 4 MB, 0 bytes
> B (type: dict): 8 bytes, 5 MB
>  - d (type: string): 3 MB, 0 bytes
>  - c (type: string): 2 MB, 0 bytes
>
> In the output above, the 1st size is the memory used by the object
> itself, and the 2nd size is the memory used by objects it refers to. A
> & B are global vars (a string and a dict), a,b,c, and d are strings
> that were added to A & B at some point in the past, and aren't refered
> to by anything else. Also, the output is in descending order of size.
>
> Are there any tools/modules/etc I can use like this?
>
> David.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From ivan.illarionov at gmail.com  Sat May  3 17:37:25 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 21:37:25 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <fvilul$15ti$1@news.mtu.ru>

On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:

> Arnaud Delobelle wrote:
>> 
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
> 
> This occurred to me also, but then I tried
> 
> sum(['abc', 'efg'], '')

Interesting, I always thought that sum is like shortcut of
reduce(operator.add, ...), but I was mistaken.

reduce() is more forgiving:
reduce(operator.add, ['abc', 'efg'], '' ) # it works
'abcefg'

-- 
Ivan


From castironpi at gmail.com  Fri May 16 10:41:34 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:41:34 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com>
Message-ID: <9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com>

On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > ?? wrote:
> > > >     I wonder why below does not work.
>
> > > > a = object()
> > > > a.b = 1        # dynamic bind attribute failed...
>
> > > The implementation of slots depends on that behaviour:
>
> > >http://docs.python.org/ref/slots.html
>
> > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > Can you expand on that?
>
> > > Peter
>
> > Spirals are important.
>
> I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> - Show quoted text -

Python 3.0a5 (py3k:62932M, May  9 2008
 win32
Type "help", "copyright", "credits" or
>>> import parser
>>> import compiler
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named compiler

Does anyone want to model mic-based soundwaves?  My recent project has
been color progression over time, and talking about compilers.


From timr at probo.com  Thu May  8 03:09:02 2008
From: timr at probo.com (Tim Roberts)
Date: Thu, 08 May 2008 07:09:02 GMT
Subject: strftime() argument 1 must be str, not unicode
References: <48215537.100@promsoft.ru>
	<mailman.695.1210147319.12834.python-list@python.org>
Message-ID: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>

"Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:

>2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
>> Subj is bag?
>>
>>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
>> (Intel)] on win32
>>  Type "help", "copyright", "credits" or "license" for more information.
>>  >>> from datetime import datetime
>>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>>  '2008_05_07 12_30_22.csv'
>>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>>  Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>  TypeError: strftime() argument 1 must be str, not unicode
>
>Unicode and str objects are not the same. Why do you think that this
>is a bug?

I think that's a perfectly reasonable thing to expect.  At the risk of
over-generalization, there is no good reason why, by this point in time,
all of the standard library routines that accept strings shouldn't also
accept Unicode strings.

It's the duck typing principle.  Unicode strings look, walk, and talk like
regular strings.  An error like this is not intuitive.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From python at rcn.com  Mon May 19 19:11:10 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 19 May 2008 16:11:10 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <50f0dc9e-6c5a-4862-b23c-14be473c531d@d19g2000prm.googlegroups.com>

On May 16, 9:01?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.

Sounds like a serious case of mis-learning.

Class methods are the preferred way to implement alternate
constructors.  For good examples, see dict.fromkeys() or any of the
various datetime constructors.

Raymond


From gizmohackers at gmail.com  Thu May  1 19:43:56 2008
From: gizmohackers at gmail.com (gizmohackers at gmail.com)
Date: Thu, 1 May 2008 16:43:56 -0700 (PDT)
Subject: Up to the minute gizmo and gadget news and reviews!
Message-ID: <17ffbd1d-ec9b-4cd8-a515-ca274613fb4e@w5g2000prd.googlegroups.com>

Come check out this new site on the latest news and reviews on gizmos
and gadgets!

http://gizmohacker.com/


From basti.wiesner at gmx.net  Mon May 26 15:26:55 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 21:26:55 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
Message-ID: <g1f2v2$129$01$1@news.t-online.com>

[ Ivan Illarionov <ivan.illarionov at gmail.com> ]

> If the OP wants PHP-style programming he will get better results with PHP
> because PHP was designed this way. Any Pythonic solution will be an
> overkill.

Better shoot yourself in the foot with a PHP-like Python-thing, than
committing suicide by shooting yourself into the head with PHP ...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From fetchinson at googlemail.com  Wed May 21 22:02:45 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 19:02:45 -0700
Subject: backport of 'set' to python 2.3?
In-Reply-To: <871w3vdrx9.fsf@benfinney.id.au>
References: <mailman.1459.1211420324.12834.python-list@python.org>
	<871w3vdrx9.fsf@benfinney.id.au>
Message-ID: <fbe2e2100805211902l1953eb16tc9697e4c09f2101e@mail.gmail.com>

>> Does anyone have a pure python implementation of the builtin 'set'
>> object so that I could use that in python 2.3?
>
> Yes. You have one in Python 2.3 already
> <URL:http://www.python.org/doc/2.3.5/lib/module-sets.html>, it's just
> not a builtin.
>
>> If this would be the case that would be really great as I wouldn't
>> have to change my code that runs happily on 2.5
>
> You will, but it's as simple as:
>
>     try:
>         set()
>     except NameError:
>         from sets import Set as set
>
> You then know that 'set' refers to the set type from that point on (or
> you're not on a version of Python that has a 'set' type at all).

Thanks Ben! I should have checked the docs........

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From lists at cheimes.de  Thu May 29 06:05:55 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 29 May 2008 12:05:55 +0200
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <g1lv63$i6t$1@ger.gmane.org>

Dark Wind schrieb:
> Hi,
> 
> Is there any command in Python which gives the code for a function like just
> typing the name of a function (say svd) in R returns its code.

Yes, it's posible to retrieve the source code IFF the function is
implemented in Python and the .py file is available, too.

>>> print inspect.getsource(inspect.getsource)
def getsource(object):
    """Return the text of the source code for an object.

    The argument may be a module, class, method, function, traceback, frame,
    or code object.  The source code is returned as a single string.  An
    IOError is raised if the source code cannot be retrieved."""
    lines, lnum = getsourcelines(object)
    return string.join(lines, '')



From deets at nospam.web.de  Tue May 13 12:45:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:45:51 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <68tuv6F2qbm5nU1@mid.uni-berlin.de>

> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Oh, would you please additionally comment on the ease of use of FT in the
domain of string-manipulation, regular expressions, collection datatypes? 

I'm keen to know which 5-10 times faster FT-driven site out there deals with
user-input without these....

Diez


From ian.g.kelly at gmail.com  Fri May  9 02:23:10 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Fri, 9 May 2008 00:23:10 -0600
Subject: slicing lists
In-Reply-To: <rXqUj.120085$rd2.64592@pd7urf3no>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
Message-ID: <3fc761710805082323s3e392b8av2605b9be8240c53f@mail.gmail.com>

On Wed, May 7, 2008 at 5:29 PM, Yves Dorfsman <yves at zioup.com> wrote:
> Is there a way to do:
> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> x[0,2:6]
>
> That would return:
> [0, 3, 4, 5, 6]
>
> I am surprised this notation is not supported, it seems intuitive.
> A concrete example of the sort of thing I want to do:
>
> p = file('/etc/passwd').readlines()
> q = [ e.strip().split(':')[0,2:] for e in p ]
>
> (getting rid of the password / x field)

Have a look at the itemgetter function from the operator module.

g = itemgetter( 0, *range(2, 6) )
p = file("/etc/passwd").readlines()
q = [ g( e.strip().split(':') ) for e in p ]


From george.sakkis at gmail.com  Fri May 23 14:00:42 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 23 May 2008 11:00:42 -0700 (PDT)
Subject: Segmentation fault on updating a BYTEA field [psycopg2]
References: <f3b33874-7f0c-4fb7-a5d3-d3c75927000c@f63g2000hsf.googlegroups.com>
Message-ID: <79a4662f-3402-49e7-a0ed-0d7a3fdb3172@r66g2000hsg.googlegroups.com>

On May 21, 6:32 pm, George Sakkis <george.sak... at gmail.com> wrote:

> I have a simple DB table that stores md5 signature pairs:
>
>    Table "public.duplicate"
>   Column  | Type  | Modifiers
> ----------+-------+-----------
>  sig      | bytea | not null
>  orig_sig | bytea | not null
> Indexes:
>     "duplicate_pkey" PRIMARY KEY, btree (sig)
>     "ix_duplicate_orig_sig" btree (orig_sig)
>
> I use SqlAlchemy to interact with it and inserting works fine; update
> however crashes hard with a segfault. Sure enough, the crash is
> reproducible when using the underlying psycopg2 directly:
>
> >>> import psycopg2
> >>> connect_string = ...
> >>> conn = psycopg2.connect(connect_string)
> >>> cur = conn.cursor()
> >>> cur.execute('SELECT sig,orig_sig from duplicate limit 1')
> >>> d = cur.fetchone()
> >>> d
>
> (<read-only buffer for 0x40209100, size 16, offset 0 at 0x403054e0>,
> <read-only buffer for 0x402090f0, size 16, offset 0 at 0x40305580>)>>> map(str,d)
>
> ["\x02#qO\xb0\xcc\xfcx\xb9u\xa5\x83)\xc4'@", '\xa1\xf22\xf6y\xd0\xbc
> \xea6\xf0Y\xf1"\xc9(\n']>>> cur.execute('UPDATE duplicate SET orig_sig=%(orig_sig)s WHERE duplicate.sig = %(duplicate_sig)s',
>
> ...             dict(orig_sig=d[0], duplicate_sig=d[1]))
> Segmentation fault
>
> Am I (and SqlAlchemy) doing something silly or is this a bug in
> psycopg2 ?
>
> George

I installed the latest release (psycopg2-2.0.7) and it seems the
problem is gone. Sorry for the noise.

George


From cjw at ncf.ca  Sat May 10 18:20:04 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 10 May 2008 18:20:04 -0400
Subject: test
Message-ID: <48261F94.6060608@ncf.ca>

test


From notnorwegian at yahoo.se  Wed May 21 15:19:16 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Wed, 21 May 2008 12:19:16 -0700 (PDT)
Subject: Psyche (scheme in python), how to run on vista?
Message-ID: <01afbef9-6225-487d-9468-cbdf9b03c64b@b1g2000hsg.googlegroups.com>

anyone using psyche?

how do you run it on Vista? what file do you click? there is no
obvious file like psyche.py...


From pistacchio at gmail.com  Thu May  8 09:49:01 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 15:49:01 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de>
Message-ID: <fvv0cg$rsh$1@aioe.org>

Marc 'BlackJack' Rintsch ha scritto:
> On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:
> 
>> Are you a newbie to Python, or to programming in general? I'll assume
>> you are a newbie to programming in general because of that last
>> question you asked. Things in Python are easier than in almost any
>> other programming language. Here are three Hello World programs:
> 
> Counterexamples for quite short "greetings" in other programming languages:
> 
> (Free)BASIC::
> 
>   Print "Hello World!"

freebasic is another language i'd point out to a newbie, even if it is 
not as multiplatform as python if. it has a decent community and a large 
amount of libraries. it doesn't let you explore functional or, worse, 
object oriented programming nor you can write server side programs with it.
The others are examples of easy "hello world" languages, but, passed 
that, i think they don't have the same capabilities of python on terms 
of support, kind of programs you can write and even overall complexity 
(haskell forces you to functional programming, io is really a minor 
language, ocalm forces you to di OOP and, if writing hello world is 
simple, on the other hand ir may have lines of code that read like:

| [] -> []

and that negatively compesate the easy way you can write "hello world"

> OCaml::
> 
>   print_string "Hello World!" ;;
>
> Io::
> 
>   "Hello World!" linePrint
> 
> Haskell::
> 
>   main = putStrLn "Hello World!"
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch


From holdenpage at gmail.com  Fri May  9 11:39:29 2008
From: holdenpage at gmail.com (Holden)
Date: Fri, 9 May 2008 08:39:29 -0700 (PDT)
Subject: A question about python and xml
Message-ID: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>

Hello everyone I heard this was a good community to go too for help
and advice. I want to make a web site that uses the python programming
language which I am VERY new at. This website would store simple data
such as names in a form. At first I wanted to use mysql to store the
data but I want to export the data using xml.

So say if a user logged in they would be able to store there basic
information in an xml file and download it whenever. Is that possible
using XML and Python. I am sorry if this post doesn't make much sense
but any advice would be greatly appreciated. You can also e-mail me if
you need further information or clarification.

Thanks

Holden


From meesters at uni-mainz.de  Thu May 29 10:11:46 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Thu, 29 May 2008 16:11:46 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
	<6a7qarF35bvivU1@mid.uni-berlin.de>
Message-ID: <g1mdj3$kbb$1@news1.zdv.uni-mainz.de>

> What happens if you get rid of the ()?
Can't see any difference.




From ptmcg at austin.rr.com  Mon May 19 09:40:31 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:40:31 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com> 
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
Message-ID: <081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>

On May 18, 10:41?am, "inhahe" <inh... at gmail.com> wrote:
> > Both the responses offer lambda free alternatives. That's fine, and
> > given the terse documentation and problems that I had understanding
> > them, I would agree. So what applications are lambdas suited to? I
> > think the parameterised function model is one.
> > What else?
>
> i've hardly ever used lambdas since map() and filter() were replaced by list
> comprehension. ?two other uses I can think of for it are: using it as a
> sorting key (which takes a function and lambdas are perfect for that when a
> direct function isn't available. for example, lambda x: x.myName), and I
> made an irc bot once that certain events had a list of fuctions that would
> be called after that event. ?it was like being able to dynamically add and
> remove event handlers. ?for example what if you asked the user a question
> and you wanted to know for the next input whether it was from that user and
> was an answer to that question. ?sometimes the function to add would be very
> simple, so writing a def for it would just be ugly.

lambda is handy in defining parse actions in pyparsing.  Parse actions
are callbacks to be run when an expression within a larger grammar is
matched.  A common use for parse actions is to do some sort of text or
type conversion.  The simplest parse actions are called using the list
of matched tokens.  Here is a subexpression that will convert numeric
strings found in a larger grammar to ints:

integer = Word("0123456789").setParseAction(lambda tokens:
int(tokens[0]) )

Since this returns an actual int, there is no need to junk up the post-
parsing code with calls to int(), float(), etc. for these simple
conversions.

Here is an example parse action that just converts a set of matched
words to title case:

title = OneOrMore(Word(alphas)).setParseAction(lambda tokens: "
".join([ t.title() for t in tokens ]) )
print title.parseString("the sun also rises")[0]

prints:
The Sun Also Rises

This second example is about as complex as I'd like to get in a
lambda, though.  Anything more elaborate than that, and I'd go with a
separately defined function.

-- Paul




From _karlo_ at _mosor.net_  Thu May 22 04:15:52 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Thu, 22 May 2008 08:15:52 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <Xns9AA6686AEABB8mosornet@161.53.160.65>

alex23 <wuwei23 at gmail.com> wrote in
news:485f7ddc-8f50-4483-b591-151f1ae560be at k10g2000prm.googlegroups.com: 

> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?

Because when you expect exception to occur on something like 0.01% of 
cases, and you have 4 or 5 exceptions and the code to test for each 
conditions that cause exceptions is quite long and burried deep inside 
some other code it's much better to do it this way ;). Too bad there's no 
syntactic sugar for doing this kind of try-except loop.


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From zxo102 at gmail.com  Sat May 24 19:05:42 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 16:05:42 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in 
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
	<e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
Message-ID: <7890f3bd-0d66-4bdd-871e-516344a39f3d@i36g2000prf.googlegroups.com>

On 5?25?, ??6?59?, zxo102 <zxo... at gmail.com> wrote:
> But this is not "\xED\x6F\x3C\x01".  I need it for
> struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
> (IEEE 754).
> Any other suggestions?
>
> ouyang
>
> On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
>
>
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
>
> > [ zxo102 <zxo... at gmail.com> ]
>
> > >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > > "\xED\x6F\x3C\x01" in python coding?
> > > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > > the error information : invalid \x escape.
>
> > [1]--> 'ED6F3C01'.decode('hex')
> > Out[1]: '\xedo<\x01'
>
> > - --
> > Freedom is always the freedom of dissenters.
> >                                       (Rosa Luxemburg)
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v2.0.9 (GNU/Linux)
>
> > iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> > YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> > =jxll
> > -----END PGP SIGNATURE------ ??????? -
>
> - ??????? -

Hash: SHA1
I got it. Just simply use it like
struct.unpack('f',"ED6F3C01".decode('hex')). It works now.

Thank you very much.
ouyang


From varshinirs at gmail.com  Sun May 11 21:05:54 2008
From: varshinirs at gmail.com (surana)
Date: Sun, 11 May 2008 18:05:54 -0700 (PDT)
Subject: A site for all your programming language needs
Message-ID: <40f72ace-ede1-4b92-a9af-e77cf511d9cf@p25g2000pri.googlegroups.com>

A complete tutorial for all your programming language needs such as
Java, .Net and many more. A one shop site for all your programming
language needs and find details on latest updates on sqlserver 2008

http://www.computenetwork.blogspot.com
http://www.sqlserversoftware.blogspot.com


From krustymonkey at gmail.com  Thu May  8 00:02:48 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Wed, 7 May 2008 21:02:48 -0700 (PDT)
Subject: pickle problem
Message-ID: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>

I'm wondering if anyone can help with a workaround for a problem I
currently have.  I'm trying to set up a prefork tcp server.
Specifically, I'm setting up a server that forks children and has them
listen on pipes created with os.pipe().  The parent process for the
group starts an inet:tcp server on a given port.  In the parent, after
a "socket.accept()", I'm trying to pickle the connection object to
send over an IPC pipe (as stated previously), but I get the following
error:

File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
    raise TypeError("a class that defines __slots__ without "
TypeError: a class that defines __slots__ without defining
__getstate__ cannot be pickled

Does anyone know of a workaround for this?  Maybe my approach to this
is wrong?  Any help would be appreciated.

Jay


From yves at zioup.com  Sun May 11 22:28:13 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 02:28:13 GMT
Subject: anonymous assignment
Message-ID: <1XNVj.133805$Cj7.33096@pd7urf2no>

Is there anyway to tell python I don't care about a value ?

Say I want today's year and day, I'd like to do something like:

import time
y, None, d, None, None, None, None = time.localtime()

I know you can't assign anything to None, but I'm sure you get what I mean, 
a special keyword that means I don't care about this value. In this 
particular case, there's got to be a better way than:

d = time.local()
y = d[0]
d = d[1]



Thanks.


Yves.
http://www.SollerS.ca


From berlin.brown at gmail.com  Tue May  6 10:40:10 2008
From: berlin.brown at gmail.com (Berlin Brown)
Date: Tue, 6 May 2008 07:40:10 -0700 (PDT)
Subject: Cygwin and path issues
Message-ID: <941c7834-3120-471f-aae9-d6dd7b412b82@a1g2000hsb.googlegroups.com>

I am trying to run some basic unit tests, but I can't get the paths
setup in python/cygwin to pick up my modules.

This code works fine in linux and I installed python through cygwin
not as part of the win32 install.


DIR_PATH =
os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
PROJECT_HOME = os.path.join(DIR_PATH, '..', '..', '..')

print("INFO: project_home=%s" % PROJECT_HOME)

EXTRA_PATHS = [
  DIR_PATH,
  os.path.join(PROJECT_HOME, 'projects', 'ghostnet'),
  os.path.join(PROJECT_HOME, 'google_appengine'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'webob'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'yaml', 'lib')
]
sys.path = EXTRA_PATHS + sys.path

print sys.path

---------------

in my ~/.bash_profile

I also included the following.

export PYTHONPATH=/cygdrive/c/projects/projects_ecl/botlist:/cygdrive/
c/projects


Basically, I tried to add the module directory locations in my code;
also I tried to add the absolute path to my PYTHONPATH.

None of these approaches work.  I get the following error, which I
dont get on the linux side:

Traceback (most recent call last):
  File "run_all_tests.py", line 108, in <module>
    from django.conf import settings
ImportError: No module named django.conf


From kyosohma at gmail.com  Wed May  7 09:07:25 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 06:07:25 -0700 (PDT)
Subject: loading folder list from my mailbox in python
References: <mailman.689.1210142506.12834.python-list@python.org>
Message-ID: <ddfa7b3b-0268-4390-a69c-3cdf7501bb48@j22g2000hsf.googlegroups.com>

On May 7, 1:15?am, ris... at students.iiit.ac.in wrote:
> Hey everyone,
> I want to print the folder list of my mailbox using python (IMAP4), and
> with hierarchy, i.e. it should print all the names of the folders of my
> mailbox and the folders within them.
> Can anyone please help me with this.

Without knowing the backend, it's mostly a shot in the dark. Oh well.
I did some Google-Fu (which you would be wise to learn) and found the
following:

http://www.devshed.com/c/a/Python/Python-Email-Libraries-part-2-IMAP/
http://www.example-code.com/python/imap.asp
http://pypi.python.org/pypi/imap-utils/0.3
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52299

I think at least one of those will get you started. If you're talking
about communicating with Exchange, then you may have to use some win32
or ctypes methods.

Mike


From wizzardx at gmail.com  Sat May 24 11:51:23 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 17:51:23 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>

> I work in small increments, writing one test at a time, then some code,
> then another test, then some more code, etc.  In fact, I take this to what
> many people might call an extreme.

Thanks for the replies.

I've read about the TDD (and similar) approaches. Maybe I need to try
it and get used to it, but there are a few things I don't like about
it on a gut level. I'll try to enumerate my concerns here.

Problem 1: You can only code against tests

Basically, with TDD you write the tests first, then the code which
passes/fails the tests as appropriate. However, as you're writing the
code you will also think of a lot of corner cases you should also
handle. The natural way to do this is to add them to the code first.
But with TDD you have to first write a test for the corner case, even
if setting up test code for it is very complicated. So, you have these
options:

- Take as much time as needed to put a complicated test case in place.
- Don't add corner case to your code because you can't (don't have
time to) write a test for it.
- Add the corner case handling to the code first, and try to add a
test later if you have time for it.

Problem 2: Slows down prototyping

In order to get a new system working, it's nice to be able to throw
together a set of modules quickly, and if that doesn't work, scrap it
and try something else. There's a rule (forget where) that your first
system will always be a prototype, regardless of intent.

With TDD, you have to first write the tests for the first version.
Then when that first version doesn't work out, you end up scrapping
the tests and the code. The time spent writing the tests was wasted.

Problem 3: Slows down development in general

Having to write tests for all code takes time. Instead of eg: 10 hours
coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
writing all the tests, and 10 on the code.

Problem 4: Can make refactoring difficult.

If you have very complete & detailed tests for your project, but one
day you need to change the logic fundamentally (maybe change it from
single-threaded to multi-threaded, or from running on 1 server to
distributed), then you need to do a large amount of test refactoring
also. The more tests you have (usually a good thing), the longer it
will take to update all the tests, write new ones, etc. It's worse if
you have to do all this first before you can start updating the code.

Problem 5: Tests are more important than code

You need to justify the extra time spent on writing test code. Tests
are nice, and good to have for code maintainability, but they aren't
an essential feature (unless you're writing critical software for life
support, etc). Clients, deadlines, etc require actual software, not
tests for software (that couldn't be completed on time because you
spent too much time writing tests first ;-)).

Problems like the above sum up why I'm not comfortable with the idea of TDD.

I think that automated tests can be very valuable for maintainability,
making sure that you or other devs don't break something down the
line. But these benefits must be worth the time (and general
inconvenience) spent on adding/maintaining the tests.

If I did start doing some kind of TDD, it would be more of the 'smoke
test' variety. Call all of the functions with various parameters, test
some common scenarios, all the 'low hanging fruit'. But don't spend a
lot of time trying to test all possible scenarios and corner cases,
100% coverage, etc, unless I have enough time for it.

I'm going to read more on the subject (thanks to Ben for the link).
Maybe I have some misconceptions.

David.


From tjreedy at udel.edu  Sat May 24 21:28:26 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 21:28:26 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com>
Message-ID: <g1afbp$5rg$1@ger.gmane.org>


"Benjamin Kaplan" <benjamin.kaplan at case.edu> wrote in message 
news:ec96e1390805241357i6e481e3enf12b4d213e887008 at mail.gmail.com...
| On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzyman at gmail.com> wrote:
|| > For example, at Resolver Systems we expose the spreadsheet object
| > model to our users. It hasa public, documented, API - plus a host of
| > undocumented internally used methods.
| >
| > We would really *much* rather hide these, because anything our
| > customers start using (whether documented or not) we will probably
| > have to continue supporting and maintaining.
| >
| > The 'we told you not to use that' approach, when applied to paying
| > customers doesn't really work... all they see is that you broke their
| > spreadsheet code by changing your API.

Python was not really written with 'difficult' customers in mind ;-)

One could largely hide private vars with a program that substituted random 
names for single _ names, and removed the doc strings for functions, 
classes, and methods with such names.

Such a program could even put such names in a separate module imported as 
'_private_do_not_use_'. 





From Sengly.Heng at gmail.com  Sat May  3 04:36:02 2008
From: Sengly.Heng at gmail.com (Sengly)
Date: Sat, 3 May 2008 01:36:02 -0700 (PDT)
Subject: image matching algorithms
References: <mailman.1780.1205130771.9267.python-list@python.org> 
	<fr48e0$r0a$1@news-int2.gatech.edu>
	<mailman.1816.1205190359.9267.python-list@python.org> 
	<fr4hc2$o9$1@news-int2.gatech.edu>
	<mailman.1880.1205331667.9267.python-list@python.org> 
	<fr9tdv$pth$1@news-int2.gatech.edu>
	<mailman.1903.1205370356.9267.python-list@python.org> 
	<frc854$jms$1@news-int2.gatech.edu>
	<mailman.1939.1205460007.9267.python-list@python.org>
Message-ID: <1cf07f3f-a9bb-4242-bb64-a663845981be@s33g2000pri.googlegroups.com>

On Mar 14, 10:59?am, "Daniel Fetchinson" <fetchin... at googlemail.com>
wrote:
> > > Since you seem to know quite a bit about this topic, what is your
> > > opinion on the apparently 'generic' algorithm described here:
> > >http://grail.cs.washington.edu/projects/query/?
> > > So far it seems to me that it does what I'm asking for, it does even
> > > more because it can take a hand drawn sample image and query the
> > > database for similar photos.
>
> > > There is even a python implementation for it here:
> > >http://members.tripod.com/~edcjones/pycode.html
>
> > > On the histogram method I agree that it won't work partly because of
> > > what you say and partly because it is terribly slow since it's
> > > comparing every single pixel.
>
> > I'm hardly the expert and can't answer authoritatively, but here's my 2c.
>
> > I can't comment as to the actual accuracy of the algorithm, since it
> > will depend on your specific data set (set of photos). The algorithm is
> > sensitive to spatial and luminance information (because of the YIQ
> > colorspace), so there are simple ways in which it will fail.
>
> > The histogram method uses only color, but has a lot of numbers to
> > compare. You may find the histogram method insensitive to spatial
> > relations (a landscape with the mountain on the left and one with the
> > mountain on the right) compared to the wavelet approach.
>
> > This is a relatively old paper, and I've seen other more recent image
> > retrieval research using wavelets (some cases using only the
> > high-frequency wavelets for "texture" information instead of the
> > low-frequency ones used by this paper for "shape") and other information
> > retrieval-related research using lossy compressed data as the features.
> > If you have time, you may want to look at other research that cite this
> > particular paper.
>
> > And just a thought: Instead of merely cutting off at m largest-wavelets,
> > why not apply a quantization matrix to all the values?
>
> I'm not at all an expert, just started to look into image matching, so
> I'm not quite sure what you mean. What's a quantization matrix in this
> context?

Hello,

I am also looking for the solution to the same problem. Could you let
me know if you have found something useful so far?

I appreciate your response.

Thanks a lot.

Sengly


From ulrich at dorda.net  Sun May 25 08:56:37 2008
From: ulrich at dorda.net (ulrich at dorda.net)
Date: Sun, 25 May 2008 05:56:37 -0700 (PDT)
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org> 
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
	<loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>
Message-ID: <79478cee-4bc6-426f-9e64-04841aee1f3d@k37g2000hsf.googlegroups.com>

Thanks a lot to all!

Apart from obtaining the solution I was searching for, I learned a lot
by studying your answers!

Cheers,

Ulrich


From bignose+hates-spam at benfinney.id.au  Fri May  2 23:29:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 13:29:23 +1000
Subject: unified command line args, environment variables,
	.conf file  settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
Message-ID: <87ve1wxdyk.fsf@benfinney.id.au>

smitty1e <smitty1e at gmail.com> writes:

> Just a fun exercise to unify some of the major input methods for a
> script into a single dictionary.
> Here is the output, given a gr.conf file in the same directory with
> the contents stated below:
> 
> smitty at localhost ~/proj/mddl4/test $ ./inputs.py
> {'source_db': '/home/sweet/home.db'}
> smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
> {'source_db': 'test_env'}
> smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
> {'source_db': 'test_cli'}

A good start. However, you need to account for two conventions with
configuration of programs via environment variables:

* Environment variables that will be inherited by subprocesses are
  conventionally distinguished from variables that will not be
  inherited by using an UPPER_CASE name for variables (like process
  config variables) that will be inherited, and a lower_case name for
  variables (like local state variables) that will not be inherited.

* The process environment is a flat namespace, so config environment
  variables need to be named to reduce the risk of namespace collision
  with variables used by other programs. This is often done by
  prefixing the name with the name of the program or system that will
  consume it. e.g. The search path for Python imports is configured
  via an attribute named 'path', but in the environment by a variable
  named 'PYTHONPATH' (yes, I know that's not exactly equivalent, but
  it's a good example).

Neither of these distinctions need to be made in a program-specific
configuration file, so these conventions don't apply there and would
be inappropriate. So you then need to deal with a configuration
setting being named one way in the environment, and another way in the
configuration file and elsewhere in the program.

This is probably best done by a mapping specifically for the
environment variable names:

    config_env_names = {
        'source_db': 'GR_SOURCE_DB',
        }

and then referencing that dictionary when inspecting the environment:

    for key in config.keys():
        # ...
        environ_name = config_env_names[key]
        environ_value = os.environ.get(environ_name)
        if environ_value is not None:
            config[key] = environ_value
        #...

-- 
 \         "Pinky, are you pondering what I'm pondering?" "I think so, |
  `\     Brain, but how will we get a pair of Abe Vigoda's pants?"  -- |
_o__)                                            _Pinky and The Brain_ |
Ben Finney


From budcrandall at hotmail.com  Fri May 30 23:32:47 2008
From: budcrandall at hotmail.com (budcrandall at hotmail.com)
Date: Fri, 30 May 2008 20:32:47 -0700 (PDT)
Subject: compatability
Message-ID: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>

I'm currently using 3ds Max Design 2009 and Maya. Will Python and
Plone be compatible with my systems? I would really like to
incorporate this software. Thank You Bud   budcrandall at hotmail.com.


From kyosohma at gmail.com  Fri May 16 17:19:41 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 14:19:41 -0700 (PDT)
Subject: encoding problem
References: <mailman.1244.1210969808.12834.python-list@python.org>
Message-ID: <b232a065-f36a-408a-a483-77d066344ea5@d45g2000hsc.googlegroups.com>

On May 16, 3:31?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> Hi, guys.
> I'm trying to read an xml file and output some of the nodes. For that, I'm
> doing a
> print node.toprettyxml()
>
> However, I get this exception:
>
> ===
> ? ? out.write(tag.toxml())
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xba' in position
> 190: ordinal not in range(128)
> ===
>
> That happens if I "print" it, or send it to stdout, or send it to a file.
>
> How can I fix it?
> cat file works perfectly, and I'm using an utf8 terminal.
>
> I'm particularly puzzled that it won't work even if I write to a file opened
> in "b" mode. Worst thing is... I don't really need that character, just a
> general idea of how the document looks like.
>
> --
> Luis Zarrabeitia (aka Kyrie)
> Fac. de Matem?tica y Computaci?n, UH.http://profesores.matcom.uh.cu/~kyrie


I recommend studying up on Python's Unicode methods and the codecs
module. This site actually talks about your specific issue though and
gives pointers:

http://evanjones.ca/python-utf8.html

HTH

Mike


From paul.melis at gmail.com  Thu May  1 17:01:42 2008
From: paul.melis at gmail.com (Paul Melis)
Date: Thu, 1 May 2008 14:01:42 -0700 (PDT)
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
Message-ID: <cb700308-c6fe-4f7e-a1d5-37ae8b736f7e@b1g2000hsg.googlegroups.com>

On 1 mei, 22:54, Peter Pearson <ppear... at nowhere.invalid> wrote:
> I'm trying to get started with pyvtk, the Python interface
> to the Visualization Toolkit,

It looks like you're using this package:
http://cens.ioc.ee/projects/pyvtk/

These are not the official Python bindings to VTK, but seem to be an
add-on that allow you to manipulate VTK _files_ from Python.

The official bindings are included in the VTK distribution and can be
enabled at build-time (assuming you build VTK yourself).

For a simple example that will open a window and show some 3D object,
see for example the example code the vtkConeSource class:
http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Examples/Tutorial/Step1/Python/Cone.py?root=VTK&content-type=text/plain

> Simply running "vtk" (apparently 4.0)

VTK 4.0 is really really old. Consider switching to 5.0 at least or
use the CVS version if you feel adventurous.

Hope this helps,
Paul


From jaywgraves at gmail.com  Sun May 18 13:42:50 2008
From: jaywgraves at gmail.com (jay graves)
Date: Sun, 18 May 2008 10:42:50 -0700 (PDT)
Subject: Python library for clustering from distance vector
References: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
Message-ID: <eacbef47-a27a-4fa2-bc96-e09ecff7b8ce@25g2000hsx.googlegroups.com>

On May 17, 11:49 pm, Sengly <Sengly.H... at gmail.com> wrote:
> I am looking for a python library which can cluster similar objects
> into their respective groups given their similarity score of each two
> of them. I have searched the group but I couldn't find any helpful
> information yet.

How about google?  Searching for the terms python and cluster gave
some results for me.

http://www.google.com/search?q=python+cluster


> Any suggestion is appreciated. Also, if you know any specific group
> that I should post this message, please also suggest.

The book, "Programming Collective Intelligence" by Toby Segaran is
great and has examples of clustering algorithms written in Python.

http://www.amazon.com/Programming-Collective-Intelligence-Building-Applications/dp/0596529325/


...
Jay Graves


From gagsl-py2 at yahoo.com.ar  Tue May 13 04:41:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 05:41:35 -0300
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>
	<g0b52s$53r$1@news.mtu.ru>
Message-ID: <op.ua23rlz0x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 01:22:52 -0300, Ivan Illarionov  
<ivan.illarionov at gmail.com> escribi?:
> On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:
>>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
>>> > wrote:
>>>
>>> > > ?can anyone tell me, in python, how to obtain some information of
>>> > > ?a running program?
>>> > > ?paticularly, if i am playing some music in audacious or other
>>> > > ?media player, how can i get the the name and some other info of
>>> > > ?current playing song? It seems that audicious doesn't output on
>>> > > ?run-time --
>>>
>> Your best bet is if the *specific* program you're interested in (e.g.
>> audacious) exposes this information programmatically in some way. It's
>> up to the developers of this application if and how they choose to do
>> it. Even if they do it, there's no requirement that the same API will
>> work for any other program of the same category, unless there is some
>> popular industry standard that most applications implement.
>
> George, have you read my post in this thread? What OP wants is actually
> possible and it's quite easy. X server is the "superprogram" that knows
> the names of all GUI window titles.

That relies on the fact that audacious (or whatever player used) actually  
includes the song name as part of its window title. As G. Sakkis said,  
this depends on the specific program used. And what about "some other info  
of?current playing song"?

-- 
Gabriel Genellina



From __peter__ at web.de  Mon May 26 06:34:33 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 26 May 2008 12:34:33 +0200
Subject: b64encode and unicode problem
References: <mailman.1606.1211797327.12834.python-list@python.org>
Message-ID: <g1e3nn$ddv$01$1@news.t-online.com>

Gabriel Rossetti wrote:

> Hello everyone,
> 
> I am trying to encode a string using b4encode and I get the following
> error :
> 
>  >>> b64encode(u"Salut Pierre, comment ?a va?")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>     encoded = binascii.b2a_base64(s)[:-1]
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in
> position 22: ordinal not in range(128)
> 
> If I remove the "u" infront of the string, it works. The problem is that
> I in my program, the string is given to me un unicode/utf-8. I tried
> several things, but I still get it, How can I get it to work, anybody
> have any idea?

>>> base64.b64encode(u"Salut Pierre, comment ?a va?".encode("utf8"))
'U2FsdXQgUGllcnJlLCBjb21tZW50IMOnYSB2YT8='

unicode is a sequence of codepoints with no predetermined representation as
a byte sequence. Therefore whenever you go from unicode to str you have to
decide upon an encoding. If you don't make that decision python assumes
ascii which will of course fail for non-ascii characters.

Peter



From swapsun at gmail.com  Wed May  7 08:25:25 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 05:25:25 -0700 (PDT)
Subject: Learning question...
Message-ID: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>

Any idea why the following program does not work? I was learning IO on
Python and the following generates a TypeError: range() integer end
argument expected, got str.
I am a beginner.

################################
# print input name (str k), j times using raw_input

def hello():
    j=raw_input("Please type in the number of times you want to print
")
    k=raw_input("Please type in your name ")
    printname(j,k)

def printname(j,k):
          for i in range(j):
                print ("Hello %s" % k)
################################


From martin at marcher.name  Tue May 20 17:11:35 2008
From: martin at marcher.name (Martin Marcher)
Date: Tue, 20 May 2008 23:11:35 +0200
Subject: self.var hmm?
In-Reply-To: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
References: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
Message-ID: <5fa6c12e0805201411y290ba5xd43caf5b78d5a14c@mail.gmail.com>

Hi,

that's because

self.group is not the same as TaskGroup.group

quickish:

class TaskGroup
  group = []
  def __init__(self):
    """
      ## note that all TaskGroup instances now use the the same self.group
    """
    self.group = TaskGroup.group
  def addTask(self, task):
    self.group.append(task)

hth
martin

On Tue, May 20, 2008 at 10:58 PM,  <notnorwegian at yahoo.se> wrote:
> class TaskGroup:
>    def __init__(self):
>        self.group = []
>
>    def addTask(self, task):
>        self.group.append(task)
>
>
> is this wrong? i have a program thats too big to post but should i
> just do group.append in addTask?
>
> reason is when later doing TaskGroup.group i get None
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.xing.com/profile/Martin_Marcher

You are not free to read this message,
by doing so, you have violated my licence
and are required to urinate publicly. Thank you.


From upton at virginia.edu  Thu May 29 10:49:07 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 10:49:07 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
Message-ID: <5504f9ac0805290749w420259a3n13a65406c69f1bd@mail.gmail.com>

On Thu, May 29, 2008 at 3:36 AM, Duncan Booth
<duncan.booth at invalid.invalid> wrote:
> Dave Parker <daveparker at flamingthunder.com> wrote:
>
>> Catch doesn't return just error types or numbers, it can return any
>> object returned by the statements that are being caught; catch doesn't
>> care what type they are.  For example:
>>
>>   Writeline catch(set x to "hello world".).
>>
>> will write "hello world".
>
> I really don't get this. Surely the point about an error being thrown to a
> catch statement is that the error path is separate from the normal
> execution path? What you are doing here is ensuring that unexpected errors
> have no chance at all of propagating up to the top level: they are
> invariably going to get caught by some other handler that was installed
> just because someone was too lazy to write a set statement followed by a
> writeline.

It also looks like an overloading of catch, semantically similar to the C:

int retcode;
if( retcode = doSomethingThatReturns0or1() ) printf("Hello world");

Again, I don't think you want to start overloading your
exception-handling mechanism.  If you want a set expression to be
equal to the l-value at the end, that's fine, but there's no reason
that catch should evaluate to an object or an integral- or real-valued
exception in error cases, or of the last statement of the block if
there's no error.  (Evaluating a block to be equal to its last
statement is okay, I guess; I know at least that there's a call in
Scheme that lets you do a more imperative programming style in the
functional language--whether that's a good thing is probably a holy
war.)  I just think if you're shooting for an easily understandable
language, overloading error handling requires more thought on the
programmer's part, not less, because they have to reason about all
outcomes.


From unknown_hero007 at hotmail.com  Fri May  9 05:51:13 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 02:51:13 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com>
Message-ID: <2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com>

On 7 touko, 14:25, Unknown Hero <unknown_hero... at hotmail.com> wrote:
> I'll post my code here once I have time to write it, currently I'm
> rather busy. That is merely for optimization suggestions and for
> others who might need the same sort of code I did.
>
> Thank you once again.

Finally managed to get it to work (heh, I was pretty darn lost even
though I had the best help) but as promised, I'll post my code here
for those who might be interested in it. The biggest of thanks to Tim
Golden, who basically walked me step-by-step through this. Most of the
code is copied from his examples above.

<code snippet>
#Goes through all keys and subkeys in the selected hive (defined as
root) and replaces the value 'old' with the value 'new'
#
#IMPORTANT! You should always back up the registry before attempting
to modify it.
#The author of this script CANNOT BE HELD RESPONSIVE for any damage
caused by running this script.
#
#To customize the script to your liking, you can alter the values old,
new, root.
#
#old and new can be any string value
#root has to be one of the following:
#
# _winreg.HKEY_LOCAL_MACHINE
# _winreg.HKEY_CURRENT_USER
# _winreg.HKEY_CLASSES_ROOT
# _winreg.HKEY_USERS
# _winreg.HKEY_CURRENT_CONFIG

import _winreg

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG

}

old = "This was value before"
new = "This is new value"

start = "HKEY_LOCAL_MACHINE\\"
startHandle = _winreg.HKEY_LOCAL_MACHINE

#Values for start and startHandle are: HKEY_LOCAL_MACHINE,
HKEY_CURRENT_USER, HKEY_CLASSES_ROOT, HKEY_USERS, HKEY_CURRENT_CONFIG


class RegKey:

  def __init__ (self, name, key):
     self.name = name
     self.key = key

  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.

  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  try:
    if "\\" not in top: top += "\\"
    root, subkey = top.split ("\\", 1)
#    print "KEY:", root + "\\" + subkey
    key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)
    subkeys = []
    i = 0
    while True:
      try:
        subkeys.append (_winreg.EnumKey (key, i))
        i += 1
      except EnvironmentError:
        break

    values = []
    i = 0
    while True:
      try:
        values.append (_winreg.EnumValue (key, i))
        i += 1
      except EnvironmentError:
        break

    yield RegKey (top, key), subkeys, values

    for subkey in subkeys:
      for result in walk (top + "\\" + subkey):
        yield result

  except WindowsError:
#    print 'Could not open key', root + "\\" + subkey + "\n"
    pass

basickeys = []
i = 0
while True:
  try:
    basickeys.append (_winreg.EnumKey (startHandle, i))
    i += 1
  except EnvironmentError:
    print i, 'subkeys found!'
    break

for x in range(len(basickeys)):
  for key, subkey_names, values in walk (start + basickeys[x]):
#    print key
    for (name, data, type) in values:
#      print "  ", name, "=>", data
      if type == _winreg.REG_SZ and old in data:
        _winreg.SetValueEx (key.key, name, 0, type, data.replace (old,
new))
</code>


Not the most effecient code, I'm sure, but it does what I want it to
do :D

Thank you once more, Tim. Also, thank you, Mike, for your advice on
saving the registry. I would have forgotten to note backing up the
registry in the beginning if it wasn't for you bringing that up. :D


From stefan_ml at behnel.de  Sun May 25 13:46:47 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 25 May 2008 19:46:47 +0200
Subject: which datastructure for fast sorted insert?
In-Reply-To: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <4839A607.7070300@behnel.de>

notnorwegian at yahoo.se wrote:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
> 
> so obv i want fast insert. i want to delete duplicates too.
> 
> which datastructure is best for this?

Keep the data redundantly in two data structures. Use collections.deque() to
append and remove as in a queue, and set() to find duplicates.

Again, no ordering, but very fast insert/delete/dup-check.

Stefan


From Sam.Dutton at itn.co.uk  Fri May 23 02:04:09 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Fri, 23 May 2008 07:04:09 +0100
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com><mailman.1484.1211483172.12834.python-list@python.org>
	<483659b1$0$11621$607ed4bc@cv.net>
Message-ID: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FE3@mx6.ITN.LOCAL>

Thanks for all the answers and comments.

>math.pi is exactly equal to 884279719003555/281474976710656, which is the closest C double to the actual value of pi

So much for poor old 22/7...

Sam
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
WWW.ITN.CO.UK

P  Please consider the environment. Do you really need to print this email?
Please Note:

 

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Thank You.




From yves at zioup.com  Wed May  7 19:29:27 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Wed, 07 May 2008 23:29:27 GMT
Subject: slicing lists
Message-ID: <rXqUj.120085$rd2.64592@pd7urf3no>

Is there a way to do:
x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
x[0,2:6]

That would return:
[0, 3, 4, 5, 6]

I am surprised this notation is not supported, it seems intuitive.
A concrete example of the sort of thing I want to do:

p = file('/etc/passwd').readlines()
q = [ e.strip().split(':')[0,2:] for e in p ]

(getting rid of the password / x field)


Thanks.

Yves.
http://www.SollerS.ca



From itskrithika at gmail.com  Fri May  2 13:26:08 2008
From: itskrithika at gmail.com (terry)
Date: Fri, 2 May 2008 10:26:08 -0700 (PDT)
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
Message-ID: <6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>

On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
> On 2008-04-25, terry <itskrith... at gmail.com> wrote:
>
> > I am trying to send a character to '/dev/ttyS0' and expect the
> > same character and upon receipt I want to send another
> > character. I tired withPyserialbut in vain.
>
> Pyserialworks. ?I've been using it almost daily for many
> years. ?Either your program is broken, your serial port is
> broken, or the device connected to the serial port is broken.
>
> > Test Set up:
>
> > 1. Send '%' to serial port and make sure it reached the serial port.
> > 2. Once confirmed, send another character.
>
> > I tried with write and read methods inPyserialbut no luck.
>
> > Can you help?
>
> Ah yes, the problem is in line 89 of your program.
>
> We've no way to help if you don't provide details. If you
> really want help, write as small a program as possible that
> exhibits the problem. ?I'd like to emphasize _small_. The
> larger the program the less likely people are to look at it,
> and the less likely they are to find the problem if they do
> look at it.
>
> Much of the time the exercise of writing a small demo program
> will lead you to the answer. ?If not, then post it, along with
> the output from the program that shows the problem.
>
> Then we can tell you what you did wrong.
>
> --
> Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! I'm also against
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? BODY-SURFING!!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?

Here is the code.

"""Open serial connection"""
	def openSerialConnection(self,serpt):
	    try:
		s1 = serial.Serial(serpt,timeout=10)

	    except:
 	    	self.print_u("Failed to open serial port %s. " %serpt)

	def enterThroughSerialPort(self,serpt):
	    s1 = serial.Serial(serpt,timeout=10)
             self.print_u('Sending !!!!..')
             while True:
                s1.write('*')
	       c = s1.read(1)
	       if c:
		  self.print_u('Found "*" ')
                    break
	    print c
             s1.write('enter\r')
             s1.read('login')

if __name__ == '__main__':
    serpt = '/dev/ttyS0'
    x.openSerialConnection(serpt)
    # funtion to reboot the device goes here ---#
    x.enterThroughSerialPort(serpt)

After opening the serial connection, the device is rebooted followed
by sending '*' to serial port and reading back the same. I seem to
have problem while trying to read '*' back from serial port. First of
all I am not sure if serial port received the '*'.

Thanks!


From arnodel at googlemail.com  Sun May  4 07:56:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 04 May 2008 12:56:48 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
	<c9735621-db58-45a0-b243-1d22651e767f@24g2000hsh.googlegroups.com>
Message-ID: <m2iqxul1tr.fsf@googlemail.com>

bearophileHUGS at lycos.com writes:

> George Sakkis:
>> A faster algorithm is to create a 'key' for each word, defined as the
>> tuple of ord differences (modulo 26) of consecutive characters.
>
> Very nice solution, it uses the same strategy used to find anagrams,
> where keys are
> "".join(sorted(word))
> Such general strategy to look for a possible invariant key for the
> subsets of the required solutions is quite useful.

Or even:

def get_key(word):
    initial = ord(word[0])
    return tuple((ord(x) - initial) % 26 for x in word[1:])

-- 
Arnaud


From hdante at gmail.com  Thu May 22 13:34:32 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 22 May 2008 10:34:32 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com> 
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com> 
	<g13d7u$5gn$1@rumours.uwaterloo.ca>
Message-ID: <664aa0c1-07ab-4603-8eea-1dabc4daba54@59g2000hsb.googlegroups.com>

On May 22, 6:09?am, Ross Ridge <rri... at caffeine.csclub.uwaterloo.ca>
wrote:
> Henrique Dante de Almeida ?<hda... at gmail.com> wrote:
>
> > Finally (and the answer is obvious). 387 breaks the standards and
> >doesn't use IEEE double precision when requested to do so.
>
> Actually, the 80387 and the '87 FPU in all other IA-32 processors
> do use IEEE 745 double-precision arithmetic when requested to do so.

 True. :-/

 It seems that it uses a flag to control the precision. So, a
conformant implementation would require saving/restoring the flag
between calls. No wonder why gcc doesn't try to do this.

 There are two possible options for python, in that case:

 - Leave it as it is. The python language states that floating point
operations are based on the underlying C implementation. Also, the
relative error in this case is around 1e-16, which is smaller than the
expected error for IEEE doubles (~2e-16), so the result is non-
standard, but acceptable (in the general case, I believe the rounding
error could be marginally bigger than the expected error in extreme
cases, though).

 - Use long doubles for archictectures that don't support SSE2 and use
SSE2 IEEE doubles for architectures that support it.

 A third option would be for python to set the x87 precision to double
and switch it back to extended precision when calling C code (that
would be too much work for nothing).


From space.captain.face at gmail.com  Thu May 29 06:26:27 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 03:26:27 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1721.1212054906.12834.python-list@python.org>
Message-ID: <2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>

On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>
> You don't say, but I assume you're on Windows since you mention
> GetFileVersionInfo (which doesn't have anything to do with media
> files, by the way) and WMA. There may be packages out there
> to do all this already but if not you'll need to pull in a few disparate
> modules and mix'n'match.
>
> While ID3 readers (which determine the metadata for MP3) are reasonably
> common few of them come ready-compiled for Windows. I've used Ned
> Batchelder's id3reader [1] successfully for simple tasks so you might try
> that. On the WMA side, you can automate Windows Media Player to get
> metadata. (And it might work for .mp3; I've not tried).
>
> <code>
> import win32com.client
>
> player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
> wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
> try:
>   artist = wmedia.getItemInfo ("Artist")
> finally:
>   player.mediaCollection.remove (wmedia, False)
>
> print "bells.mp3 has artist", artist
>
> </code>
>
> You're going to have to dig around for docs on this one. And it's not
> pretty. Try starting from:
>
> http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>
> TJG
>
> [1]http://nedbatchelder.com/code/modules/id3reader.html

Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
and I just assumed that there must be a way to programmatically get
the stuff you get from choosing properties in the right click menu.
But I guess there isn't (hard to believe, because I can't see MS hard-
coding each and every file format's metadata into it's OS). I might
have to learn more about the command prompt ( I hear there is a module
for fiddling with it) and work from there.

Cheers for the links though, I will be checking them out :)


From http  Wed May  7 02:39:57 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:39:57 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <7xbq3iaa82.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
> In practice, the probability of hijacking of source code by an evil
> corporation is very low for most projects. And even when it did
> happen, the evil corporation would likely submit patches. 

If they're going to submit patches then they shouldn't have any problem
with the GPL.

> The more users an open source project has, the better.

That is simply not a valid premise, as others have explained.  The
priorities of any particular project might give weight to the number
of users or might emphasize something else altogether.  And some
projects are just plain bad (think of malware or spamming tools), so
it's better for the world in general if they fail and have no users
regardless of the developers' wishes.


From lars at gustaebel.de  Tue May 27 08:47:40 2008
From: lars at gustaebel.de (Lars =?iso-8859-1?Q?Gust=E4bel?=)
Date: Tue, 27 May 2008 14:47:40 +0200
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
In-Reply-To: <414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
	<414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>
Message-ID: <20080527124740.GA23226@axis.g33x.de>

On Tue, May 27, 2008 at 01:51:47AM -0700, sebastian.noack at googlemail.com wrote:
> I have written a FileWrapper class as workaround, which works for me
> (see the code below). The FileWrapper object holds an internal file-
> like object and maps its attributes, but prevents the user (in this
> case tarfile) from closing the internal file, so I can still access
> StringIO's content after closing the TarFile object.
> 
> But this should not be required to create in memory tar files. It is
> definitely a bug, that TarFile closes external file objects passed to
> tarfile.open, when closing the TarFile object. The code which opens a
> file is also responsible for closing it.

You're right, _BZ2Proxy.close() calls the wrapped file object's close() method
and that is definitely not the desired behaviour. So, if you can do without 'bz2'
modes for now, you're problem is gone, all other modes work fine.

I fixed it (r63744), so the next beta release will work as expected. Your test
script helped a lot, thanks.

Regards,

-- 
Lars Gust?bel
lars at gustaebel.de

A casual stroll through a lunatic asylum shows that
faith does not prove anything.
(Friedrich Nietzsche)


From yves at zioup.com  Mon May 12 23:23:30 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:23:30 GMT
Subject: anonymous assignment
In-Reply-To: <Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
	<Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
Message-ID: <SQ7Wj.264445$pM4.99013@pd7urf1no>

Scott David Daniels wrote:
> Yves Dorfsman wrote:
>> ... Sorry this was a typo (again :-), I meant:
>> d = time.local()
>>   y = d[0]
>>   d = d[2]
> Then:
>     y, d = list(time.localtime())[:4:2]
> 

What is this ?
Could you point me to a document on this syntax ?

I've tried it, it works, but I don't understand how.


Thanks.

Yves.


From tarun.kap at gmail.com  Fri May  2 15:04:04 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 12:04:04 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
Message-ID: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>

On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
wrote:
> TkNeo wrote:
> > WHAT ?
>
> > This is crazy
>
> Crazy like a fox?
>
> a = [1, 2, 3]
> try:
>      a.index(99)
> except:
>      a.append(99)
> finally:
>      print a.index(99)
>
> MY question: which exception should I actually be catching there?
> ** Posted fromhttp://www.teranews.com**

ofcouse try catch is going to work but in ideality the index function
should return a -1 and no way in hell crash.


From bruno.desthuilliers at gmail.com  Thu May 15 17:28:05 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 14:28:05 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
Message-ID: <7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>

On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > Why can't I write this?
> > > --
>
> > Because your antecedent is undefined?
>
> Of the two ways to play, just to say #define this per se would be a
> bad move, but that's one that comes from the wrong group.  #define is
> a big scary macro, that python hasn't been using; it's the one-line
> typo.  Instance:
>
> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> Use it to render planes in solids.
>
> Back about 'this', I honestly hadn't remembered 'til this time, when I
> got a chance to reread the subject.  Plus I keep ditching my radio.
>

Jesus H. Christ. This really sounds like my mother in law. Scary,
definitively.


From wuwei23 at gmail.com  Wed May 21 06:15:54 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:15:54 -0700 (PDT)
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
Message-ID: <a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>

On May 21, 7:52 pm, TheSaint <fc14301... at icqmail.com> wrote:
> Hello,
>
> I'm not a master of python :) If I would publish my program for reviewing,
> where should I upload it?

For simple "look at my code" I like http://paste.turbogears.org/

Sample: http://paste.turbogears.org/paste/2697

There's also http://python.pastebin.com, which lets you create a new
paste by modifying an existing one, and keeps them linked for easy
diff'ing.

Sample: http://python.pastebin.com/d3964b241



From notontheweb at noisp.com  Thu May  8 16:29:42 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 20:29:42 GMT
Subject: web client in Python Q
In-Reply-To: <mailman.766.1210253066.12834.python-list@python.org>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>	<mailman.732.1210209312.12834.python-list@python.org>	<DluUj.663832$us.393032@fe04.news.easynews.com>
	<mailman.766.1210253066.12834.python-list@python.org>
Message-ID: <VoJUj.667694$us.200801@fe04.news.easynews.com>

Jerry Hill wrote:
> On Wed, May 7, 2008 at 11:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
>> I wonder why it does not work with
>>
>>  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW
> 
> It looks like that is a subscription site.  That makes things more
> complicated, because it means you'll need to figure out how to log in,
> then probably store cookies related to your session and offer them
> back up to the web server on subsequent requests.  Python has modules
> that help with these things (mostly in the urllib2 module if i recall
> correctly), but it's not quite as straightforward as just fetching a
> URL.
> 
> I don't have time to dig up an example at the moment, but if you're
> still having trouble with it, I can try to pull something together
> this weekend.
> 

Thanks for the help, Jerry.  I do subscribe to that service, but tapping 
the data via Python may be more trouble than it's worth.  I can get all 
the info for stocks and ETF's from finance.google.  All I am missing is 
indexes.  I can probably live without those.  But if you want a 
challenge, have at it.  It would be appreciated.

Jive



From gagsl-py2 at yahoo.com.ar  Sun May  4 19:01:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 20:01:02 -0300
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
Message-ID: <op.uanjj0qux6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 03:35:05 -0300, George Sakkis <george.sakkis at gmail.com> escribi?:
> On May 4, 2:04?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>> En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallo... at invalid.com> escribi?:
>>
>> > I made a function that takes a word list (one word per line, text file)
>> > and searches for all the words in the list that are 'shifts' of
>> > eachother. ?'abc' shifted 1 is 'bcd'
>>
>> But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.
>
> A faster algorithm is to create a 'key' for each word, defined as the
> tuple of ord differences (modulo 26) of consecutive characters. E.g.
> the key of 'acf' is (2,3); 'c' is 2 positions after 'a' and 'f' 3
> positions after 'c'. Shifted words (and only these) have the same key.

Much better! I like it.

-- 
Gabriel Genellina



From ivlenin at gmail.com  Sun May 25 14:27:22 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 18:27:22 GMT
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).

With Ivan's approach, you lose access to the actual lambdas, so you need 
to create a new function and then modify its code object to actually call 
the code; this seems a little clunky to me. You might instead want to 
wrap the lambdas in an object that will do the comparison you want:

class Code(object):
	def __init__(self, func):
		self._func = func
	
	def __cmp__(self, other):
		return cmp(self._func.func_code, other._func.func_code)

	def __call__(self, *args, **kwargs):
		return self._func(*args, **kwargs)

func_set = set(Code(f) for f in funclist)


From clabepa at gmail.com  Wed May 14 04:29:38 2008
From: clabepa at gmail.com (clabepa)
Date: Wed, 14 May 2008 10:29:38 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <mailman.1087.1210718589.12834.python-list@python.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
Message-ID: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>

Stef Mientki wrote:

> I've ran the first real world application through PPyGui-emulator,
> so I think it's time to release the first version.
> There's lot of room for improvements and a more beautiful layout.
> 
> PPyGui-emulator is build upon wxPython and released under BSD license.
> 
> For remarks, screen shots and downloads, see
> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html

Wow! wonderful.
I was searching for it for debugging and easy development purposes,
screenshots sounds promising.

but the api.py link is broken.

> have fun,
> 
> Stef Mientki

Many thanks
Claudio


From vivainio at gmail.com  Wed May  7 06:46:23 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Wed, 7 May 2008 03:46:23 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <8dbb25a6-1306-4670-b835-6fbf999413de@k13g2000hse.googlegroups.com>

On May 6, 10:42 pm, Anton Slesarev <slesarev.an... at gmail.com> wrote:

> flines = (line for line in f if pat.search(line))

What about re.findall() / re.finditer() for the whole file contents?



From brechmos at gmail.com  Sat May 31 15:12:47 2008
From: brechmos at gmail.com (brechmos)
Date: Sat, 31 May 2008 12:12:47 -0700 (PDT)
Subject: parse dates
Message-ID: <0f58a4f7-ba18-4f83-9291-12bc844a37a0@p25g2000hsf.googlegroups.com>

Hi,

I have been using PHP the last while and in particular strtotime.
What I want to replicate is finding the second or fourth Monday of the
next month.  In PHP with strtotime it is easy (strtotime("second
Monday", strtotime("next month"), but I can't find an easy way to do
it in Python.  I have seen DateUtil, but it seems to be able to do
only the simpler parsing (could be wrong).

Any other ideas?


From johnjsal at NOSPAMgmail.com  Sun May 11 23:46:42 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 12 May 2008 03:46:42 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
Message-ID: <4827bda2$0$11606$607ed4bc@cv.net>

Ben Finney wrote:

> John Salerno <johnjsal at gmailNOSPAM.com> writes:
>
>> num = 33
>> 
>> for x in xrange(10):
>>     print num += 1
>
> Which is better done by 'num += 10'.
>
> Can you come up with an example that isn't trivially replaced with
> clearer code? That might make it clearer what your concern is.

::sigh:: No, unfortunately I don't have a strong enough grasp of Python
to give a really in-depth example. I understand what you're asking
though. Perhaps people don't use this idiom as much as I think they do,
so to give a trivial example to support my point isn't helpful.

As far as I know, though, I think this is used often enough, so I
thought I'd just ask if there are purists out there who don't like this
use of the loop and feel it's an abuse of the syntax.


From deets at nospam.web.de  Wed May 14 11:56:11 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 17:56:11 +0200
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
Message-ID: <690ge0F2vj8fiU1@mid.uni-berlin.de>

> When I learned about static methods, I learned they're a way to
> tightly couple some functionality with a class without tying the
> functionality to any of the instances. I see them as nothing more than
> a design decision. To me they make some sense.

Which you can say exactly about classmethods - because there is *no*
instance.
 
> Other than a methods signature (classmethod(cls, l) and a
> staticmethod(l)) a class method does anything that a static method
> does and gets the CLS reference for FREE?

Yes.

> Is this why a static method 
> is considered to be overkill? In other words, either one can be called
> from either the class or the instance and both work pretty much the
> same *but* only the class method includes the class for reference and
> the static method does not?

Yes.
 
> The only real difference I see between an instance and either a class
> or static method is the whole bound/unbound thing. Otherwise, even an
> instance can do what the others do *just* the instance method can only
> make those calls through an instance and not the class.

Which is a pretty heavy distinction. 
 
> Instance methods make the most sense. A static method makes sense too
> *but* I can see how a class method not only does what a static method
> does but how a class method *also* gets the cls reference for free.

I don't understand the last part - but I certainly agree on the "instance
methods make the most sense". But *if* you want a hierarchy
of "sensefulness",

method > classmethod > staticmethod

is the ordering to apply I'd say. Again: classmethods get *more* context
than staticmethods *without* needing an instance. More is better :)

Diez


From gnewsg at gmail.com  Wed May 28 20:26:38 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 28 May 2008 17:26:38 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
Message-ID: <0f0801ab-4fcb-4262-a6d6-fc19401efeb1@m3g2000hsc.googlegroups.com>

On 28 Mag, 23:13, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>
> > Following your posts in this thread, I see that
> > you 'plan to add soon' every cool feature that every other language seems to
> > have.
>
> I've already added a lot of them. ?For example, loops that don't need
> looping variables:
>
> For 1000 times do ...
>
> Explicit infinite loops:
>
> For forever do ...
>
> I don't those are features that every other language seems to have,
> not even Python.
>
> Plus, by this weekend, built-in compiled fullscreen 3D graphics will
> be in, too.
>
> > With no certainty whatsoever that today's program will work on
> > tomorrow's FT.
>
> Kind of like how this year's program won't work on next year's
> Python? ?Except Flaming Thunder is faster. ;)

On 28 Mag, 23:13, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>
> > Following your posts in this thread, I see that
> > you 'plan to add soon' every cool feature that every other language seems to
> > have.
>
> I've already added a lot of them.  For example, loops that don't need
> looping variables:
>
> For 1000 times do ...
>
> Explicit infinite loops:
>
> For forever do ...
>
> I don't those are features that every other language seems to have,
> not even Python.
>
> Plus, by this weekend, built-in compiled fullscreen 3D graphics will
> be in, too.
>
> > With no certainty whatsoever that today's program will work on
> > tomorrow's FT.
>
> Kind of like how this year's program won't work on next year's
> Python?  Except Flaming Thunder is faster. ;)

This is nonsense.
Python 2.x is around since... what is it? Almost 10 years?
It lasted that long maintaining retro-compatibility between the
various versions.
It's very funny that you point your finger at Python's compatibility
as a factor of weakness when your FT breaks it *every week*.
Before trying to convince whoever that your FT is better than Python
you should first decide what to do with your own product by starting
to implement all that *basic* features which are common to all modern
languages (arrays, OOP, error handling, data structures, Unicode
support, etc...).
Once you do that, ask yourself if the way you did it was good/
reliable, ask users what they think about it, and apply changes as
necessary.
At that point you'll be ready to start publicizing FT as an
alternative in respect to other languages.
Currenlty you're trying to push something which is not even a "pre-
alpha" over something else (Python) which has been around since about
20 years and it is known to be one of the cleanest and more elegant
languages around.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From pavlovevidence at gmail.com  Fri May 16 19:03:15 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 16:03:15 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
Message-ID: <6330d8bf-f164-4ae6-8bfb-76c742a72ad2@2g2000hsn.googlegroups.com>

On May 16, 6:38 pm, amit.ut... at gmail.com wrote:
> Hey there,
>
> I have a simple question about python print statement. Take the
> following code snippet for example...
>
> 1 print "-#- executing: %s" % section,
> 2 tests[section] = test.testcase(name=config.get(section,'name'))
> 3 tests[section].runTest()
> 4 printStatus(tests[section])
>
> Now the problem is that line 1 does not get printed until line 4. What
> I thought would happen is that line 1 gets executed and the user sees
> that the statement that the test case is executing. Then after the
> test case executes a "PASS" or "FAIL" appears on the same line as the
> "-#- executing: 0053" statement.
>
> e.g.
> -#- executing: 0053     FAIL
>
> Some tests take a long time to finish thus the screen is blank until
> the entire test finishes and the above statement is outputted.


Your standard output uses line-buffering, which means that the
underlying I/O code stores all the output in memory until it gets a
newline, only then does it send the output to the terminal (or
console, or whatever).

Workarounds to this are as follows:

1. Explicity flush the buffer after any print statements that end with
a comma:

print "whatever",
sys.stdout.flush()

2. Run Python in unbuffered mode, by using the -u switch:

python -u yourscript.py


Carl Banks


From notnorwegian at yahoo.se  Thu May 22 20:02:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 17:02:35 -0700 (PDT)
Subject: spider, why isnt it finding the url?
Message-ID: <08c10a3d-8cb8-433f-9831-cecf8fb7095b@y21g2000hsf.googlegroups.com>

this program doesnt produce any output, however i know from testing
that the url-regexp matches urls...

import urllib
import re

site = urllib.urlopen("http://www.python.org")

email = re.compile(r'[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}')
url = re.compile("^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]{1}
([\w\-]+\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?
((\?\w+=\w+)?(&\w+=\w+)*)?")

for row in site:
    obj = url.search(row)
    if obj != None:
        print obj.group()


From guibog at gmail.com  Sat May 17 23:14:19 2008
From: guibog at gmail.com (Guillaume Bog)
Date: Sun, 18 May 2008 11:14:19 +0800
Subject: Shelve or pickle module
Message-ID: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>

Hello,

I read and re-read "Python in a Nutshell" written by Alex Martelli,
who knows what he is talking about. I'm a bit new to python and I'm
going to start doing persistence side on a project. Martelli's book
seems to tell me that I should use shelve module, but any code I
browsed is using pickle instead. Is there any reason to prefer pickle
over shelve?

Thanks,


From banibrata.dutta at gmail.com  Sat May 10 00:38:24 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sat, 10 May 2008 10:08:24 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <g02ale$lnj$1@ger.gmane.org>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
Message-ID: <3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>

Thanks, Gabriel and Terry, for your responses.

Another somewhat realted, but very noob'ish question --

given that I already have Python2.5 installed & will install Python2.4, will
copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
i think the answer is "no", but still asking. is it package specific ?

does it matter if the packages were egg drops ?

On 5/10/08, Terry Reedy <tjreedy at udel.edu> wrote:
>
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message
> news:op.uav4dutjx6zn5v at a98gizw.cpe.telecentro.net.ar...
> En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta
> <banibrata.dutta at gmail.com> escribi?:
>
> |> I already have Python25, and need to install Python24. I would prefer
> not to
> |> remove Python25, but each Python version seems to update the registry, I
> |> guess (not sure), overwriting each other's entries. Any way to have both
> |> versions ?
>
> |They can coexist peacefully. The last one you install will be the default
> |version to handle .py files automatically.
>
> Since 2.5 at least, the Windows installer gives the option to make the new
> installation the default or not.  One might have to choose 'custom' versus
> 'auto' (don't remember for Python), but I do the latter always anyway.
>
> tjr
>
>
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From arne at vajhoej.dk  Sat May 31 20:30:45 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Sat, 31 May 2008 20:30:45 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <g1qobk02jbj@news4.newsguy.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
Message-ID: <4841edb4$0$90265$14726298@news.sunsite.dk>

szr wrote:
> Arne Vajh?j wrote:
>> Stephan Bour wrote:
>>> Lew wrote:
>>> } John Thingstad wrote:
>>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> } > I don't like the style, but many do.
>>> }
>>> } Please exclude the Java newsgroups from this discussion.
>>>
>>> Did it ever occur to you that you don't speak for entire news groups?
>> Did it occur to you that there are nothing about Java in the above ?
> 
> Looking at the original post, it doesn't appear to be about any specific 
> language.

That does not make it on topic in the Java group.

And the subthread Lew commented on most certainly is not.

Arne


From nayden at gmail.com  Mon May 26 12:13:27 2008
From: nayden at gmail.com (nayden)
Date: Mon, 26 May 2008 09:13:27 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <56acb43d-071e-4416-b8af-6b210d1c8b2f@56g2000hsm.googlegroups.com>

Thanks everyone for the helpful suggestions.


From roy at panix.com  Sun May 25 10:39:06 2008
From: roy at panix.com (Roy Smith)
Date: Sun, 25 May 2008 10:39:06 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<69t0qlF356llmU1@mid.uni-berlin.de>
Message-ID: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

> > I agree that tests should not depend on each other, but sometimes it's 
> > still useful to have the tests run in a certain order for reporting 
> > purposes.
> 
> Then sort your report. Seriously. A test-outpt shoud be in a way that 
> delimits individual testresults in a way that makes them easily 
> extractable. Then if you want them to be ordered for e.g. diff'ing - 
> sort them.
> 
> Diez

Here's an example of why *running* tests in order can make sense.

You could have a bunch of tests of increasing complexity.  The first bunch 
of tests all run in a few seconds and test some basic functionality.  From 
experience, you also know that these are the tests that are most likely to 
fail as you port to a new environment.

There's also some tests which take a long time to run.  If the basic stuff 
that's being tested by the earlier tests doesn't work, there's no way these 
tests could pass, but they still take a long time to fail.

It's really handy to have the simple tests RUN first.  If you see they 
fail, you can cancel the rest of the test run and get on with fixing your 
code faster.

It's a good thing to make it easy to do things the right way, and difficult 
to do things the wrong way.  The danger is when you let your pre-conceived 
notions of right and wrong trick you into making it difficult to do things 
any way but YOUR way.

So far, the strongest argument I've seen against the OP's idea is that it's 
not portable to Iron Python.  That's a legitimate argument.  All the rest 
of the "You're not supposed to do it that way" arguments are just religion.


From johnroth1 at gmail.com  Wed May  7 17:20:59 2008
From: johnroth1 at gmail.com (John Roth)
Date: Wed, 7 May 2008 14:20:59 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org> 
	<b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com>
Message-ID: <387351b2-cea5-4206-874d-6dfb94fda94b@8g2000hse.googlegroups.com>

On May 7, 3:03 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
>
> > M?ta-MCI (MVP) wrote:
> > > Hi!
>
> > >> I don't often feel like using this word
>
> > > Look at languages like OCAML or F #
>
> > > @-salutations
>
> > Well of course, we're all well aware of other languages that allow
> > variables to be bound in the middle of an expression.  It's just that
> > Python was purposely created without that (mis)feature because it's so
> > unclear, and easy to abuse.
>
> This is the same argument that has been used to justify the lack of MI
> and operator overloading in Java.
>
> Not that I would support having assignment as expressions in Python
> (wouldn't fit the whole design IMHO), but this is still a somewhat
> arbitrary design choice, not necessarily a GoodThing(tm) by itself -
> well designed expression-based languages have their strength too.

Clearly this leaves C and C++ out [grin]. After all, a significant
problem in those languages is confusing = and ==. I wouldn't mind
seeing a way of assigning in the middle of an expression because it
comes up fairly frequently when one needs to do a test and save the
result at the same time. However I absolutely do not want to see the
operator be =.

However, if it's not =, then it opens another can of worms, that is,
what to call it, and where it fits into the precedence structure. <--
might work.

John Roth


From notnorwegian at yahoo.se  Sat May 24 22:34:26 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 19:34:26 -0700 (PDT)
Subject: class-oriented rather than object-oriented?
Message-ID: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>

i have some confusion over this.

sure a class is basically a classification, like for example an animal
or flower. and an object/instance of that class is then for example a
cat.

an object is an instance of a class. that i know, i also know how to
program with classes etc.

i am just confused about the term object-oriented.

wouldnt class-oriented be more fitting? at least for java since what
you do is divide everything into classes.

in python i dont or at leats not as much.


does object-oriented refer to that everything(strings, ints etc) are
all objects? so there is a class string somewhere in the
implementation rather than a primitive or somehing?

are python functions objects?

can a functional language be object-oriented or an objectoriented
language be functional?
one definition of OO is a language that passes messages between
objects. but not necessarily that is has to pass message sbetween
classes?


From bj_666 at gmx.net  Sat May  3 13:34:29 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 3 May 2008 17:34:29 GMT
Subject: pygame: rect moveto?
References: <7360a3b3-61b8-4cb9-b4d7-177c532bc880@b1g2000hsg.googlegroups.com>
Message-ID: <683m15F2rmn3gU1@mid.uni-berlin.de>

On Sat, 03 May 2008 09:51:06 -0700, globalrev wrote:

> http://www.pygame.org/docs/ref/rect.html#Rect.move
> 
> well i need to put my rect ina specific place and i donw know from
> where i will move it so i need a function rect.moveTo(x,y).
> 
> how do i do that?

No need for a function or method::

  rect.topleft = (x, y)

Ciao,
	Marc 'BlackJack' Rintsch


From jgodoy at gmail.com  Sun May  4 07:08:09 2008
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 May 2008 08:08:09 -0300
Subject: about bsddb module
References: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>
	<22b79613-2346-4eb0-afb3-46542940c2ad@b5g2000pri.googlegroups.com>
Message-ID: <p6i0f5-oaf.ln1@strongwill.g2ctech>

cocobear wrote:

> On 5?3?, ??7?17?, cocobear <cocobear... at gmail.com> wrote:
>> How to deal with multiple databases in an file. I want to get the
>> content of several databases.

(...)
 
> Anybody can help me?

I believe you can only have one database per file with the Python
abstraction...  But you can try this (straight from Google for "sleepycat
multiple databases" and sleepycat came from the docs for bsddb):

http://www.nextgen6.net/docs/db4.1.25/api_java/db_open.html

and pay attention to the details here:

http://forums.oracle.com/forums/thread.jspa?threadID=581528&tstart=15





From eckhardt at satorlaser.com  Wed May 28 06:25:23 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Wed, 28 May 2008 12:25:23 +0200
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
	<c23adf49-c644-4ae0-8724-d0a2c91fb430@k30g2000hse.googlegroups.com>
Message-ID: <khovg5-mub.ln1@satorlaser.homedns.org>

Chris wrote:
> On May 28, 11:08?am, dave_140... at hotmail.com wrote:
>> Say I have a file, utf8_input, that contains a single character, ?,
>> coded as UTF-8:
>>
>> $ hexdump -C utf8_input
>> 00000000 ?c3 a9
>> 00000002
[...]
> weird thing is 'c3 a9' is ?? on my side... and copy/pasting the ?
> gives me 'e9' with the first script giving a result of zero and second
> script gives me 1

Don't worry, it can be that those are equivalent. The point is that some
characters exist more than once and some exist in a composite form (e with
accent) and separately (e and combining accent).

Looking at http://unicode.org/charts I see that the letter above should have
codepoint 0xe9 (combined character) or 0x61 (e) and 0x301 (accent).

0xe9 = 1110 1001 (codepoint)
0xc3 0xa9 = 1100 0011  1010 1001 (UTF-8)

Anyhow, further looking at this shows that your editor simply doesn't
interpret the two bytes as UTF-8 but as Latin-1 or similar encoding, where
they represent the capital A with tilde and the copyrigth sign.

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From skanemupp at yahoo.se  Tue May 13 14:18:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:18:31 -0700 (PDT)
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
Message-ID: <fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>

On 13 Maj, 18:59, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>
> > if i do something like
> > while 1:
> >     print "x"
>
> > will the program ever stop because it runs out of memory?
>
> No, there is no reason to run out of memory. This will simply
> make an everlasting x-printer and there is no need to store
> anything (except output buffers, terminal scrollback, etc.,
> but all of this is temporary and of limited size). In case of
> adding elements to a list, the memory usage can, of course,
> grow unlimitedly. On linux, if the process eats up too much
> memory, it gets killed. I do not know about windows, but
> they would probably crash with a BSOD or something of that
> sort.


and when the program get skiled because out of memory all this will be
deleted from the memory?

so there is no way that you can, by accident, fill your whole
harddrive and make it unusable?

and RAM-memory always get cleaned out when not used i guess?


From gherron at islandtraining.com  Tue May 13 17:12:57 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 14:12:57 -0700
Subject: variable scope question?
In-Reply-To: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>
References: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>
Message-ID: <482A0459.5000503@islandtraining.com>

globalrev wrote:
> http://mail.python.org/pipermail/python-list/2003-October/233435.html
>
> why isnt it printing a in the second(second here, last one in OP)
> example before complaining?
>
> def run():
>   a = 1
>   def run2(b):
>     a = b
>     print a
>   run2(2)
>   print a
> run()
>
> def run():
>   a = 1
>   def run2(b):
>     print a
>     a = b
>   run2(2)
>   print a
> run()
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
If you had told us what error you got, I would have answered you hours 
ago.   But without that information I ignored you until is was 
convenient to run it myself.  Now that I see no one has answered, and I 
have time to run your examples, I see the error produced is

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in run
  File "<stdin>", line 4, in run2
UnboundLocalError: local variable 'a' referenced before assignment

and its obvious what the problem is. 

In run2 (of the second example),  The assignment to a in the line "a=b" 
implies that a *must* be a local variable.    Python's scoping rules say 
that if "a" is a local variable anywhere in a function, it is a local 
variable for *all* uses in that function.  Then it's clear that "print 
a" is trying to access the local variable before the assignment gives it 
a value.

You were expecting that the "print a" pickups it the outer scope "a" and 
the assignment later creates a local scope "a",  but Python explicitly 
refuses to do that.

Gary Herron



From kay.schluehr at gmx.net  Fri May 16 08:07:32 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Fri, 16 May 2008 05:07:32 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>

On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> Hello all,
>
> Yesterday we found the cause of a bug that has caused problems for a long time.
> It appeared to be the following:
>
> class A(object):
>     pass
>
> print min(1.0, A())
>
> which is accepted by Python even though the A() object is not numerical in
> nature.
>
> The cause of this behavior seems to be the compare operation of the object
> class.
>
> Is there a way to disable this behavior in Python (other than deriving a new
> 'object-like' class that doesn't do comparisons?)
>
> Sincerely,
> Albert

Are you sure you don't want to use a statically typed language that
captures all type errors just by inspecting your source code?


From maxwell.newlands at gmail.com  Fri May 16 07:50:40 2008
From: maxwell.newlands at gmail.com (max)
Date: Fri, 16 May 2008 04:50:40 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
	<24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>
	<325be043-d911-4cce-9c3b-56209033cd68@d45g2000hsc.googlegroups.com>
Message-ID: <fb4cda98-11a6-4be1-b1b4-e2c32e5dedd3@m73g2000hsh.googlegroups.com>

On May 15, 10:31?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:49?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
> > On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>
> > > On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > > > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > > > work:
>
> > > > > > > > from mutagen.mp3 import MP3
> > > > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > > > [snip]
> > > > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > > > contents.
>
> > > > > > cool, so how do i give it the path, if not in the form of a URL
> > > > > > string? ?maybe this is obvious...
> > > > > > --
> > > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > > It doesn't look like you can, with mutagen. So, time to find a different
> > > > > library that supports arbitrary file objects instead of only file paths.
> > > > > I'd suggest starting here:
> > > > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > > > Possibly one with actual documentation, since that would also be a step
> > > > > up from mutagen.
>
> > > > After a bit of time looking around, looks like nearly all the python id3
> > > > modules expect to work with filenames, instead of file objects.
>
> > > > I can't vouch for it, and the documentation still looks sparse, but this
> > > > module at least looks capable of accepting a file object:
> > > >http://pypi.python.org/pypi/tagpy
>
> > > > Looks like it'd be a challenge to build if you're on windows, since it
> > > > depends on an external library.
>
> > > > Alternately, you could probably create a subclass of the mutagen stuff
> > > > that used an existing file object instead of opening a new one. No idea
> > > > what that might break, but seems like it would be worth a try.
>
> > > > As last ditch option, could write the first few kb of the file out to a
> > > > temp file and see if mutagen will load the partial file.
>
> > > Okay, now I'm officially spending too much time looking through this
> > > stuff.
>
> > > However, looks like the "load" method of the MP3 class is what you'd
> > > want to override to change mutagen's file loading behavior. Probably
> > > pass the URL as the filename, and take a cut & paste version of the
> > > default load method from ID3FileType and change it to use urllib2 to
> > > open it instead of a local file open.
>
> > > Might work. Might not. No warranty express or implied.
> > > --
> > > John Krukoff <jkruk... at ltgc.com>
> > > Land Title Guarantee Company- Hide quoted text -
>
> > > - Show quoted text -
>
> > I'm supposed to question "time.toomuch.spend". ?NAMERS!- Hide quoted text -
>
> > - Show quoted text -
>
> Is there a way 'time.toomuch.spend' can be scanned for in code? ?If
> not, let's play!

really, really appreciate your help, john.  gonna have to ponder my
next move here...


From aahz at pythoncraft.com  Sun May  4 16:19:05 2008
From: aahz at pythoncraft.com (Aahz)
Date: 4 May 2008 13:19:05 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
	<mailman.554.1209926677.12834.python-list@python.org>
Message-ID: <fvl5np$a8d$1@panix3.panix.com>

In article <mailman.554.1209926677.12834.python-list at python.org>,
Gary Herron  <gherron at islandtraining.com> wrote:
>
>However, the upshot of all of this is that one must maintain extreme 
>skepticism.   Unless you know both your Python code and any extension 
>modules you call, and you know them at a level necessary to find such 
>details, you must conclude that any operation, no matter how atomic it 
>my look, may in fact not be atomic. 

Absolutely.  Note that your statement is insufficiently encompassing:
any Python library code might easily use classes that define special
methods that cause GIL release.

This is why those of us who champion correct use of threads say that the
only easy way to create working threaded programs is to pass objects
around in Queues and never never never use an object in multiple threads.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From arnodel at googlemail.com  Sun May 18 14:44:56 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 18 May 2008 19:44:56 +0100
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <m2r6bz78pj.fsf@googlemail.com>

"Matt Porter" <mabbikeel at gmail.com> writes:

> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt
> -- 
> --

>>> string = 'sssssssssspppppppaaaaaaam'
>>> ''.join(x for x, y in zip(string, '\0'+string) if x != y)
'spam'

HTH

PS: I keep seeing problems on this list whose solution seems to
involve 'window' iterating over a sequence. E.g.

>>> list(window('eggs', 2))
[('e', 'g'), ('g', 'g'), ('g', 's')]

-- 
Arnaud


From caca at mailinator.com  Sat May 31 08:09:32 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Sat, 31 May 2008 05:09:32 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <mailman.1787.1212192138.12834.python-list@python.org>
Message-ID: <645bddab-3ab9-472a-b162-4ef466af5abf@26g2000hsk.googlegroups.com>


  Have you seen this page?
    http://matplotlib.sourceforge.net/screenshots.html
  On watching this, I wouldn't say matplotlib is inferior to matlab
plotting. Also, I don't know what they use in sage, but they have 3D
plots of surfaces that you can rotate with the mouse.
  Do as you like, but if you want to "intergrate as many exsiting
computation libraries as possible" you may end up doing something too
similar to sage. I wouldn't want to go on such a trip alone, so even
if sage is not exactly what I would do, I will probably work with
them. Their client-server approach should make it easy to work on a
cool interface without messing too much with their code. It's true,
you'll have to carry with you a lot of symbolic computation tools that
may be you don't need as an engineer, but is it that important? The
client-server approach has other advantages: if you have a very
lightweight computer (like EEE), you can place the server at home and
the lightweight computer is enough to have a full scientific
environment outdoors. And yes, I'm pretty sure you can call any
library from within sage the same way you'd do it from python.
 Regards
Pablo


From gnewsg at gmail.com  Tue May 13 14:52:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 11:52:03 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com> 
	<cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>
Message-ID: <211ce0e0-4196-49ab-af35-17877ca78568@w7g2000hsa.googlegroups.com>

On 13 Mag, 18:35, "ludvig.eric... at gmail.com"
<ludvig.eric... at gmail.com> wrote:

> Anyway, I went for a subclassing way of dealing with it, and it works
> fine.

As Josiah already stated pay attention to the changes that will be
applied to asyncore internals in Python 2.6 and 3.0 (in detail you
could take a look at how things will be changed by taking a look at
the patch provided in bug #1736190).
Your subclass could not work on all implementations.

--- Giampaolo
http://code.google.com/p/pyftpdlib


From hniksic at xemacs.org  Thu May  8 17:35:04 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 08 May 2008 23:35:04 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de>
Message-ID: <8763tofpiv.fsf@mulj.homelinux.net>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
>> The thing is, I'm not using slots by choice.  I'm using the standard
>> lib "socket" class, which apparently uses slots.
>
> `socket` objects can't be pickled.  Not just because of the
> `__slot__`\s but because a substantial part of their state lives in
> the operating system's space.

Of course, if it makes sense to pickle sockets in the application, one
is can do so by defining __getstate__ and __setstate__:

class Connection(object):
    def __init__(self, host, port):
        self.host = host
        self.port = port
        self.init_sock()

    def init_sock(self):
        self.sock = socket.socket()
        self.sock.connect((host, port))
        ... init communication ...

    def __getstate__(self):
        # pickle self as a (host, port) pair
        return self.host, self.port

    def __setstate__(self, state):
        # reinstate self by setting host and port and
        # recreating the socket
        self.host, self.port = state
        self.init_sock()


From yves at zioup.com  Wed May  7 22:53:31 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 08 May 2008 02:53:31 GMT
Subject: class definition
In-Reply-To: <mailman.730.1210208367.12834.python-list@python.org>
References: <K5rUj.249337$pM4.157639@pd7urf1no>
	<mailman.730.1210208367.12834.python-list@python.org>
Message-ID: <LWtUj.249781$pM4.74568@pd7urf1no>

Miles wrote:

> In Python 2.2, classes and types were unified.  If a class inherits
> from object (or any other built-in), it is considered a "new-style"
> class; otherwise, it is an old-style (or classic) class.  There are
> some differences in their behavior; most notably, descriptors
> (computer properties) will not work with old-style classes.  Old-style
> classes will go away in Python 3 (I think), and all classes will have
> object as a base.
> 
> An introduction to new-style classes:
> http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html
> A guide to descriptors:
> http://users.rcn.com/python/download/Descriptor.htm
> The reference manual on the distinction:
> http://docs.python.org/ref/node33.html
> The technical explanation:
> http://www.python.org/download/releases/2.2.3/descrintro/

Thanks Miles, I've started to go though those links, that should keep me 
busy for a while !

Yves.
http://www.SollerS.ca


From bronger at physik.rwth-aachen.de  Fri May 30 03:39:44 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 30 May 2008 09:39:44 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
Message-ID: <87skw0s0jj.fsf@physik.rwth-aachen.de>

Hall?chen!

Duncan Booth writes:

> [...]
>
> I don't understand your problem: it's just a single thread so
> killfile or skip it.

Although I agree with you that there is no problem, *this* is not a
good justification for this thread.  One should stay on topic in
*every* thread.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From cocobear.cn at gmail.com  Sun May  4 01:06:59 2008
From: cocobear.cn at gmail.com (cocobear)
Date: Sat, 3 May 2008 22:06:59 -0700 (PDT)
Subject: about bsddb module
References: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>
Message-ID: <22b79613-2346-4eb0-afb3-46542940c2ad@b5g2000pri.googlegroups.com>

On 5?3?, ??7?17?, cocobear <cocobear... at gmail.com> wrote:
> How to deal with multiple databases in an file. I want to get the
> content of several databases.
>
> it's the code I wrote:
>
> [cocobear at cocobear ~]$ python
> Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
> [GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> importbsddb
> >>> import os
> >>> import time
>
> >>> db_file = 'native.db'
> >>> db =bsddb.db.DB()
> >>> db.open(db_file,bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
> >>> dbs = db.keys()
> >>> db.open(db_file,dbs[0],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
> >>> db.keys()
>
> ['\x01\x00\x00\x00', '\x02\x00\x00\x00', '\x03\x00\x00\x00',
> '\x04\x00\x00\x00', '\x05\x00\x00\x00']
>
> >>> db.open(db_file,dbs[1],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>
> the program stop here.


Anybody can help me?


From wuwei23 at gmail.com  Tue May 13 22:54:14 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 19:54:14 -0700 (PDT)
Subject: 2004 example, passing function error
References: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
Message-ID: <44816313-c296-4730-8f7c-15f0c24604a0@z16g2000prn.googlegroups.com>

On May 14, 11:40 am, globalrev <skanem... at yahoo.se> wrote:
> so just a mistake on his part? but it looks like he just copied his
> shell...has there been a change since 2004 inr egards to how you can
> pass functions as arguments to functions??

Adding the value argument (x) to the compose function really limits
its usefulness as well. Given the author was talking about functions
as first class objects, it makes more sense for compose to return a
function, rather than to perform several function calls and return a
value.

Here, compose creates a new function that performs first 'f' then 'g'
on a value:

>>> def compose(f, g):
...     def _compose(x):
...         return f(g(x))
...     return _compose
...
>>> compose(sqr, cube)
<function _compose at 0x00B7BEB0>
>>> compose(sqr, cube)(2)
64

The advantage being you can easily create function chains this way:

>>> sqrcube = compose(sqr, cube)
>>> sqrcube(2)
64

And because they're functions, you can use them with compose to
construct more complex functions:

>>> cubesqrcube = compose(cube, sqrcube)
>>> cubesqrcube(2)
262144

Just to show they're functionally the same:

>>> cubesqrcube(2) == cube(sqrcube(2)) == cube(sqr(cube(2)))
True

I like this approach because it separates the function composition
from its execution. But you can also achieve much the same by using
functools.partial (in 2.5+):

>>> def compose(f, g, x): return f(g(x))
...
>>> compose(sqr, cube, 2)
64
>>> from functools import partial
>>> sqrcube = partial(compose, sqr, cube)
>>> sqrcube(2)
64
>>> cubesqrcube = partial(compose, cube, sqrcube)
>>> cubesqrcube(2)
262144

Hope this helps.

- alex23


From ohad911 at gmail.com  Wed May 21 07:51:56 2008
From: ohad911 at gmail.com (ohad frand)
Date: Wed, 21 May 2008 14:51:56 +0300
Subject: problem with import / namespace
Message-ID: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>

Hi
I have a problem that the solution to it must be very simple but i couldnt
fint it's answer in the internet so far (i searched for couple of days)
the problme is as follows:

i have two directories e.g. "\\1" and "\\2"
in each directory i have two files with the same names e.g. "tmp1.py" and
"tmp2.py"
each tmp2.py file imports tmp1 from its same directory (import tmp1) - thats
the problem
if i execute one file (\\1\tmp2.py) than the execution is ok
but when i try after that to execute the second file (\\2\tmp2.py) than the
tmp1 file from the wrong directory ( - directory 1 in this case) is imported
instead.
i tried many things to try to solve it, i removed the previous path from
sys.path and added the new one, i tried to change current working directory
with os.chdir()
I tried to delete from locals and from globals the name tmp1 before running
the second file but nothing worked.
please help

Thanks,
Ohad
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From aztnat at 163.com  Tue May 13 10:09:51 2008
From: aztnat at 163.com (aztnat at 163.com)
Date: Tue, 13 May 2008 07:09:51 -0700 (PDT)
Subject: Threader Earrings -- A Fashion Jewelry Success Story
Message-ID: <3933d207-7ef3-4a68-887e-7486e6b8f5f7@c19g2000prf.googlegroups.com>

New jewelry fashions need several factors going for them if they are
to succeed. These include aesthetics, price, timing, and maybe even
just sheer, plain luck. Threader earrings seem to have all these
qualities in abundance. Also known as earthreads or ear strings,
threader earrings have a very large following, especially among the
young set, who think that they are and cool.

Threader earrings are exactly what they sound like: a length of a thin
chain that the wearer threads through one or more ear piercings. The
chain is attached to a small metal bar ? called a lead -- on one end,
and the other end is adorned with decorative materials such as gems,
beads, or crystals. The wearer first inserts the lead, slides the
chain through the piercing and then just lets the earring dangle.
Threader earrings are especially attractive in individuals with two or
more earlobe piercings because they can mix and match designs, and
even knot or weave the chains of the threader earrings together to
create a funky effect.

The chains used are very thin, delicate and light. They usually
measure from three to five inches and are often made from metals such
as gold vermeil and sterling silver. Influenced by the decorative
ornaments used, the themes of threader earrings? designs range from
the playful to the sophisticated. Pearl embellishments impart a sense
of elegance, while multicolored vintage crystals or flashy glass beads
make threader earrings perfect for casual wear.

Young celebrities, or those counting themselves as members of the X
and

http://users6.nofeehost.com/jecky/html/Bothsexes/20061002/47598.html



From wizzardx at gmail.com  Sun May 25 16:54:05 2008
From: wizzardx at gmail.com (David)
Date: Sun, 25 May 2008 22:54:05 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <g1cic3$3e9$1@panix3.panix.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
Message-ID: <18c1e6480805251354h3f306866jef4229a1b3b060d@mail.gmail.com>

>
> You must have poor project management/tracking.  You WILL pay the cost
> of testing, the only question is when.  The when does have an impact on
> other aspects of the development process.
>
> Speaking as someone who started in my current job four years ago as the
> third developer in a five-person company, I believe that your claim about
> the differences between small companies and large companies is specious.
> --

Might be a difference in project size/complexity then, rather than
company size. Most of my works projects are fairly small (a few
thousand lines each), very modular, and each is usually written and
maintained by one developer. A lot of the programs will be installed
together on a single server, but their boundaries are very clearly
defined.

Personally I've had to do very little bug fixing and maintenance.
Thorough testing of all my changes before they go into production
means that I've caught 99% of the problems, and there is very little
to fix later.

That's why I'm surprised to hear that such a huge amount of time is
spent on testing maintenance, and why the other posters make such a
big deal about unit tests.

I'm not a genius programmer, so it must be that I'm lucky to work on
smaller projects most of the time.

David.


From petr.poupa at gmail.com  Tue May 13 13:41:43 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Tue, 13 May 2008 10:41:43 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.996.1210619207.12834.python-list@python.org>
Message-ID: <1ac03741-176a-4e70-a220-b854098fdec4@t54g2000hsg.googlegroups.com>

On 12 Kv?, 21:06, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.po... at gmail.com wrote:
> > [snip]
>
> >My script send me via 3883 port (VRPN) data, but only once. I need
> >listening this port countinously.
> >So I need  make some loop to print data from 3883 port permanent.
> >Data that I recevied looks liek this:
>
> >receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'
>
> I'm not sure if you need to write a server or a client.  In your
> original code, you had a client which repeatedly established out-
> bound connections.  Here, you say you need to listen on a port.
>
>
>
> >Do you think its necessary to use Twisted? Do you have any ideas how
> >to do it with socket modul?
>
> The basic version is pretty easy either way.  However, with Twisted,
> you get cross-platform error handling without any extra effort, and
> you don't have to think about the boring low-level details of BSD
> sockets.
>
> Here's a Twisted server that listens on port 3883 forever and prints
> the data it receives from each connection after the remote side drops
> the connection:
>
>     from twisted.internet import reactor
>     from twisted.internet.protocol import ServerFactory, Protocol
>
>     class PrintingProtocol(Protocol):
>         def connectionMade(self):
>             """
>             When the connection is first established, create a list
>             into which to buffer all received data.
>             """
>             self.received = []
>
>         def dataReceived(self, data):
>             """
>             Whenever any data is received on this connection, add it
>             to the buffer.
>             """
>             self.received.append(data)
>
>         def connectionLost(self, reason):
>             """
>             When the connection is lost, print out the contents of
>             the receive buffer.
>             """
>             print repr("".join(self.received))
>
>     # Create a factory which will use our protocol to handle incoming
>     # connections.
>     factory = ServerFactory()
>     factory.protocol = PrintingProtocol
>
>     # Listen with it on port 3883
>     reactor.listenTCP(3883, factory)
>
>     # Start the reactor.  Nothing in this program will ever stop the
>     # reactor, so it will run and accept connections forever.
>     reactor.run()
>
> If you were to use the socket module, then it would look something like this:
>
>     from socket import socket
>     from errno import EINTR
>
>     port = socket()
>     port.bind(('', 3883))
>     port.listen(5)
>     while True:
>         try:
>             server, clientAddr = port.accept()
>         except socket.error, e:
>             print "Error accepting client connection", e
>         else:
>             received = []
>             while True:
>                 try:
>                     bytes = server.recv(1024 * 16)
>                 except socket.error, e:
>                     if e.errno == EINTR:
>                         continue
>                     else:
>                         break
>                 if not bytes:
>                     break
>                 received.append(bytes)
>             print repr("".join(received))
>
> Hope this helps,
>
> Jean-Paul

Thanks for code. I am trying both of them, but I am crash to another
problem.
For socket modul example python report:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\listen2.py", line 5, in
<module>
    port.bind(('', 3883))
  File "<string>", line 1, in bind
error: (10048, 'Address already in use')


and for twisted example pythod report:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\listen2twisted.py",
line 8, in -toplevel-
    class PrintingProtocol(Protocol):
  File "C:\Documents and Settings\poupa\Plocha\listen2twisted.py",
line 28, in PrintingProtocol
    print repr("".join(self.received))
NameError: name 'self' is not defined

How can I solve this errors?
(for twisted I instal zope for python, pywin32 and twisted. all for
python 2.4)






From deets at nospam.web.de  Wed May 28 11:15:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 17:15:07 +0200
Subject: pydb remote debugging/cmd.Cmd over socket?
Message-ID: <6a5b8qF35n4hiU1@mid.uni-berlin.de>

Hi,

I'm fiddling around with pydb. Installation and usage are fine. What I
especially like is the fact that you can attach a signal such that you drop
into debugging mode on demand.

But this is of limited use to me in situations where a server is written in
python. According to the source, pydb's debugger class Gdb extends cmd.Cmd.

It passes stdin/stdout-arguments that should be usable to replace the
standard streams. But so far all my experiments simply dropped the process
into debugging mode putting out and getting io over stdin/stdout - not my
self-supplied streams.

So I wonder (being a bit rusty on my UNIX-piping-skillz): how does one do
that - essentially, create a remote python shell using cmd.Cmd? 

Diez


From dave.g1234 at gmail.com  Tue May 20 16:39:20 2008
From: dave.g1234 at gmail.com (dave)
Date: Tue, 20 May 2008 13:39:20 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com> 
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com> 
	<7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com> 
	<m2zlqp75xs.fsf@googlemail.com>
Message-ID: <51ebd8fa-3719-46ae-99b2-1a46ff847a8c@w5g2000prd.googlegroups.com>

On May 17, 12:20 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> dave.g1... at gmail.com writes:
> > On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
> > <bruno.desthuilli... at gmail.com> wrote:
> >> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>
> >> > Thanks for the responses.  I'm well aware that the function can be
> >> > passed in the parameters, passing in the functino as an arg defeats
> >> > the purpose of what I'm going after.
>
> >> Why so ?
> >> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> >> > but a perfunctory glance looks like we're doing the close to the same
> >> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> >> > can pass in other parameters to foo.
>
> >> I may be wrong (if so please pardon my lack of intelligence and/or
> >> provide a couple use case), but it looks like you're trying to
> >> reinvent partial application.
>
> >> from functools import partial
> >> def foo(x, y):
> >>   return x + y
>
> >> pfoo = partial(foo, 2)
> >> print pfoo(42)
>
> >> Don't know if this helps...
>
> > Ok, so that solves the issue of the aforementioned compose function.
> > We could do compose( partialfoo,....) ) etc (although I might say I
> > prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
> > provide wrapper around an object that lets you call abritrary
> > functions on that object with it as a parameter - i.e., as if it were
> > a method in a class.  The partial function was only a component of the
> > code I posted earlier. Or am I missing something you're saying?
>
> Ok so you want to do
>
>     wrap(x).foo(42).bar('spam')...
>
> What is the advantage over
>
>     foo(x, 42)
>     bar(x, 'spam')
>     ...
>
> ?
>
> --
> Arnaud



*shrug*, just syntactic preference I guess.  In jquery, for example,
you are working over sets of DOM elements and it's convenient to chain
those statements into a single line of x.foo().bar().biz() etc.  IMO
it's a little cleaner to do that as an 'atomic' line, but it's  not
really that different.  Ideally the classes you are using would
support this without 'wrap' but I was just tinkering with a hack to do
it that way.

Thanks for the help

dave


From upton at virginia.edu  Mon May 26 15:49:33 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 15:49:33 -0400
Subject: definition of a highlevel language?
In-Reply-To: <45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805261249r7eafa4d0k15e068e8cae9b60f@mail.gmail.com>

On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:
> On May 26, 3:02 pm, notnorweg... at yahoo.se wrote:
>
>> what is crazy about it?
>
> To make, say, a Python machine fast, you'd have to optimize the hell
> out of the architecture, probably all the way down to the microcode
> level.  Thus, a hypothetical hardware-based Python machine would look
> very little like other, more conventional chips like x86 or ARM, for
> instance.  In fact, I suspect it'd look a lot like the CPython virtual
> machine on an instruction level.

I don't know if it would necessarily look like the CPython VM, except
for the decode stage (this being said without any knowledge of the
CPython implementation, but with more than I ever thought I'd know
about processor architecture/microarchitecture)--I guess it depends on
if you'd have to treat Python bytecode instructions as CISC and then
would want to convert them to micro-ops to execute.  I don't know
about the LISP machine, but I know that many if not all of the
attempted implementations of Java machines really just ran Java
bytecode as its native instruction set.  (I assume they did some
optimizations though to actually use registers rather than treating it
as a stack machine, or maybe they just had a register stack.)

The point about them looking very little like x86/ARM/etc chips is the
important part though--IIRC, part of the failure of Java machines was
lousy support for preexisting code, due to the optimizations for Java
bytecode, and I expect the same would be true of a Python
bytecode-optimized processor.


From pavlovevidence at gmail.com  Wed May  7 13:09:43 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 10:09:43 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com> 
	<15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com> 
	<7x8wyma6w8.fsf@ruckus.brouhaha.com>
Message-ID: <1997187c-0347-4aca-a7eb-c884f37df73c@s50g2000hsb.googlegroups.com>

On May 7, 3:51 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > Nonsense.  They could be more than willing to contribute their
> > patches, but aren't willing to accept the GPL's limitation to being
> > used only in open source packages.
>
> Oh, I see what you mean--I'm considering any derived work to be a
> patch, which is maybe an overbroad use of that term.  If they are
> willing to contribute their patches in that sense, the GPL shouldn't
> be a problem.  If they want to just send back small scraps of
> improvement while incorporating the GPL'd program into a closed
> program, the GPL is doing its job if it prevents that.

I think what I said is applicable to derived works, if the idea is to
derive another non-open-source work in turn.

I.e., someone might be motived to create a derived work of some code
with the expectation of using it in their non-open-source project, but
if it's GPLed they can't do that, so they probably wouldn't bother.


Carl Banks


From bearophileHUGS at lycos.com  Tue May 20 09:05:04 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:05:04 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de>
Message-ID: <3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com>

Helmut Jarausch:
> I'd ask in comp.compression where the specialists are listening and who are
> very helpful.

Asking in comp.compression is a good starting point.

My suggestions (sorry if they look a bit unsorted): it depends on what
language you want to use, how much you want to compress the strings,
if they are ASCII or unicode, how much quickly you want to compress/
decompress them, and how much time you have to write the encoder/
decoder.

You can use Python or a C/D extension, if you use C you will need more
time to develop it, but you will be quite more free to use any
algorithm you want (well, you are free with Python too, but the code
may be slower if it performs low level things), so D may be an
acceptable compromise.

Generally it's better to start with the simplest solution, and go on
from there looking for more complex ones if the first one isn't
enough. In Python the simplest thing to try is to compress the strings
with zip:
"George Washington".encode("zip")
Probably the result is longer than the original (25 bytes output for
this string). With "bz2" the results are probably worse (56 bytes for
this string).

A possible alternative it to compress many (10-30) strings at a time,
using an external table of their starting points (you can put the
table at the beginning), or you can separate those strings with a
separator char that's never present in the strings; and then you can
zip that group. If you have 1 million strings you can divide them into
such little groups, but the indexing in the DB becomes complex, and I
don't like this solution much.

A bit less simple python solution is to keep a fixed corpus of text
and compress it with and without the little string you want to add
(like you say), but compressing/decompressing everything each time (if
the corpus is small enough this isn't that slow), for example:

>>> s2 = a 2488 bytes long text
>>> len(s2)
2488
>>> z1 = (s2).encode("zip")
>>> len(z1)
1321
>>> s = 'George Washington'
>>> len((s).encode("zip"))
25
>>> len(s.encode("bz2"))
56
>>> z2 = (s2+s).encode("zip")
>>> len(z2)
1332
>>> len(z2) - len(z1)
11

So you need to store only this 11 byte long string to be able to
decompress it. A bigger corpus (s2) allows you a bit more compression,
but it requires more time for compression/decompression:

>>> len(s3) # s3 is a longer English text
10811
>>> z3 = s3.encode("zip")
>>> len(z3)
4971
>>> z4 = (s3+s).encode("zip")
>>> len(z4)
4980
>>> len(z4) - len(z3)
9

One of the simpler ways to compress short ASCII English texts is to
see that the most frequent chars are very few, so you can encode the
15 most common English chars with 1 nibble, and the other ones with 3
nibbles (first nibble is an escape, and the two following are the
whole byte), if you use a low level language you can encode this with
few lines of code, it's very fast and it may shave off 25-33% of your
bytes. It means that your "George Washington" (17 chars long) may
become about 12-13 chars long. I have implemented this with Python
too, it's easy.

Another possible solution is to use a Huffman compression with fixed
symbol frequencies. In Python there are ways to write such compressor/
decompressor in just 10-15 lines code. You can use the heapq to speed
up the processing. This may lead to more compression, but I presume
not much than less than 4-5 bpc. But if you want to compress/
decompress a LOT of strings you may need to write (or look for the
code) in C/D.

This is one implementation that doesn't use heapq yet:

from operator import itemgetter



def clean_tree(obj):

    if isinstance(obj, tuple):

        return obj[0]

    else:

        return [clean_tree(obj[0][0]), clean_tree(obj[0][1])]



def huffman_generate(freqsl):

    while len(freqsl) > 2:

        freqsl.sort(key=itemgetter(1))

        freqsl = [ [freqsl[0:2], freqsl[0][1] + freqsl[1][1]] ] +
freqsl[2:]

    return [freqsl, -1]



def tree2dict(tree):

    def encode(tree, out=""):

        if isinstance(tree, list):

            encode(tree[0], out+"0")

            encode(tree[1], out+"1")

        else:

            dic[tree[0]] = out

        return dic

    dic = {}

    return encode(tree)



freqs = [('a', 45), ('b', 13), ('c', 12), ('d', 16), ('e', 9), ('f',
5)]

print tree2dict(clean_tree(huffman_generate(freqs)))

If you want to use a Huffman you can use the usual tricks to increase
compression: use 2-char symbols, or even use whole words as symbols
(but you can use whole words only if you are sure your language is
English with few strange words).

If you want more compression, like a 6 bytes (2.8 bpc) output you will
need more complex algorithms. On long English texts the best
compressors need less than 0.9 bpc, but they are surely useless for
you. I don't think you will be able to go down to 6 bytes for that
string, unless you are ready to pay lot of computational time :-)

Bye,
bearophile


From inhahe at gmail.com  Tue May 20 23:07:03 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 23:07:03 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
	<0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>
Message-ID: <XkMYj.13011$Xv3.1374@bignews4.bellsouth.net>

oh yeah!  thanks for pointing it out, i should have thought of that, i 
*just* read about it today, or was it yesterday.

so what's the problem with pickle?  i have a feeling, maybe i read it, that 
when you pickle a derived class it pickles it as a member of the base class, 
is that it?

i don't know how i would get around the problem, though, because i'd have to 
know how to access the deque object that my class stores when i do 
deque.__init__ in my constructor, so that i could pickle it and my class 
variables separately.




"Larry Bates" <larry.bates at websafe.com`> wrote in message 
news:0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d at comcast.com...
> inhahe wrote:
>>   def __init__(self, filename, initial):
>>
>> should be
>>
>>   def __init__(self, filename, initial=[]):
>>
>> (that was the whole reason i put the filename first.)
>>
>> sorry.
>>
>>
>>
> Defaulting initial to empty list this way is asking for trouble.  You 
> should
> default it to None and check for None and reset to empty list.
>
> -Larry 




From nagle at animats.com  Sun May 25 03:41:02 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 25 May 2008 00:41:02 -0700
Subject: webspider getting stuck
In-Reply-To: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>
References: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>
Message-ID: <483914b3$0$34506$742ec2ed@news.sonic.net>

notnorwegian at yahoo.se wrote:
> i am writing a simple webspider .
> 
> how do i avoid getting stuck at something like this:
> Enter username for W3CACL at www.w3.org:
> 
> ?


   It's a silly feature of urllib.  See

http://docs.python.org/lib/module-urllib.html

where it says:

"Note: When performing basic authentication, a FancyURLopener instance calls its 
prompt_user_passwd() method. The default implementation asks the users for the 
required information on the controlling terminal. A subclass may override this 
method to support more appropriate behavior if needed."

Yes, the default behavior when faced with a site that wants authentication
is to to ask for a user name and password on standard input.  This is
seldom what you want.

So subclass and overrride.

					John Nagle


From exarkun at divmod.com  Mon May  5 10:16:51 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 10:16:51 -0400
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>
Message-ID: <20080505141651.6859.554247783.divmod.quotient.59048@ohm>

On Mon, 5 May 2008 16:05:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>On Mon, May 5, 2008 at 3:48 PM, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>> On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>>
>> > Hi!
>> >
>> > I have a C module for which I created a wrapper with swig. The function
>> def is:
>> >
>> > C:
>> >
>> > int some_thing(unsigned char * the_str);
>> >
>> > eg:
>> >
>> > Python:
>> >
>> > some_module.some_thing (the_str)
>> >
>> > Now I would like to feed it with a UTF-8 formatted string:
>> >
>> > test = u'Make \u0633\u0644\u0627\u0645, not war.'
>> >
>>
>>  `test? is not a UTF-8 encoded string.  It's a unicode string.
>>
>>  To get a UTF-8 encoded string from a unicode string, use the `encode?
>>  method:
>>
>>    some_module.some_thing(test.encode('utf-8'))
>
>Yes you are correct. It is unicode string. But still if I use encode I
>get the same error:
>
>TypeError with message: in method 'some_thing', argument 1 of type
>'unsigned char *'
>
>So I am looking for a way to "cast" unicode string to unsigned char *.
>

You need to provide some more information about `some_module.some_thing?.
How is it implemented?  What Python type does it expect?  If it doesn't
take a unicode string and it doesn't take a byte string, I don't know
what kind of string it does take.

Jean-Paul


From qgallet at gmail.com  Fri May 23 11:15:02 2008
From: qgallet at gmail.com (Quentin Gallet-Gilles)
Date: Fri, 23 May 2008 17:15:02 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <8b943f2b0805230815l3f9963bav69c7d589a01cd386@mail.gmail.com>

I personally don't see any benefit in this approach. By definition,
unittests should be independent, so the order argument suggests a deeper
issue.  What's your use case ?

Quentin

On Fri, May 23, 2008 at 11:36 AM, Antoon Pardon <apardon at forel.vub.ac.be>
wrote:

> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?
>
> *** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
> --- unittest.py 2008-05-23 11:19:57.000000000 +0200
> ***************
> *** 570,575 ****
> --- 570,577 ----
>          """
>          def isTestMethod(attrname, testCaseClass=testCaseClass,
> prefix=self.testMethodPrefix):
>              return attrname.startswith(prefix) and
> callable(getattr(testCaseClass, attrname))
> +         def getlinenr(name):
> +             return getattr(testCaseClass,
> name).im_func.func_code.co_firstlineno
>          testFnNames = filter(isTestMethod, dir(testCaseClass))
>          for baseclass in testCaseClass.__bases__:
>              for testFnName in self.getTestCaseNames(baseclass):
> ***************
> *** 577,582 ****
> --- 579,586 ----
>                      testFnNames.append(testFnName)
>          if self.sortTestMethodsUsing:
>              testFnNames.sort(self.sortTestMethodsUsing)
> +         else:
> +             testFnNames.sort(key=getlinenr)
>          return testFnNames
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From wojtek.gminick.walczak at gmail.com  Tue May  6 02:46:07 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 08:46:07 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>
References: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
	<2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>
Message-ID: <2c3c21060805052346x23752828x8d587b7bacf3303d@mail.gmail.com>

2008/5/6, Wojciech Walczak <wojtek.gminick.walczak at gmail.com>:
>  a > 99999.0 returns True because NotImplemented > 99999.0 returns True.
>  a < 99999.0 returns False because NotImplemented < 99999.0 returns False.

Sorry, it should rather be:

Decimal('0.5') > 9.0 returns True because:
Decimal('0.5') > NotImplemented returns True

and:

Decimal('0.5') < 9.0 returns False because:
Decimal('0.5') < NotImplemented returns False

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From BrianVanderburg2 at aim.com  Thu May  1 08:24:01 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 01 May 2008 08:24:01 -0400
Subject: Signals/Slots support in Python
Message-ID: <4819B661.7080103@aim.com>

I don't know if any such support is already built in, so I ended up 
making my own simple signals/slots like mechanism.  If anyone is 
interested then here it is, along with a simple test.  It can connect to 
normal functions as well as instance methods.  It also supports weak 
connections where when an object is gone, the slot is gone as well, the 
slot just holds a weak reference to the object.

Brian Vanderburg II


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From waldemar.osuch at gmail.com  Wed May  7 04:12:04 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Wed, 07 May 2008 08:12:04 GMT
Subject: Problem parsing SOAP envelope with ElementTree
In-Reply-To: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
References: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
Message-ID: <ovdUj.119321$rd2.85572@pd7urf3no>

Zvi wrote:
> Hi All,
> 
>    Can someone tell me why id the following not working?

snip not working code

> 
> What am I doing wrong?

Here is working code.

8<-----------------------------
from xml.etree import ElementTree as ET

data = """<soap:Envelope 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<Get2Response xmlns="http://tempuri.org/">
<Get2Result><![CDATA[<?xml version='1.0' encoding='UTF-8'?>
<Response>
<Entity Name='Accounts' Current='00300571B42F1DEC8E9B6CDF19A59950'>
<Instance Id='00300571B42F1DEC8E9B6CDF19A59950'>
<Field Name='Status' Value='2'/>
<Field Name='Id' Value='MC4670'/>
<Field Name='Name' Value='ACDC Industries Inc'/>
<Field Name='City' Value='Milwaukee'/>
<Field Name='MainContact' Value=''/>
<Field Name='CreatedOn' Value='20070723051316.0000000 '/>
</Instance>
</Entity>
</Response>]]>
</Get2Result>
</Get2Response>
</soap:Body>
</soap:Envelope>"""

env = ET.fromstring(data)
result = env.find('*//{http://tempuri.org/}Get2Result')
response = ET.fromstring(result.text)
for elm in response.getiterator():
     print elm
8<-----------------------------------------

In the future please paste complete examples. It helps me to help you.
They were two things that I found to be wrong:
- searching using wrong path. You missed *// in front of the tag
- parsing only once. There are two xml sources here.
   The first parse got you the representation of the Envelope.
   You have to parse the Get2Result payload to get at the
   interesting part

Waldemar


From miller.paul.w at gmail.com  Tue May 13 23:32:40 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 20:32:40 -0700 (PDT)
Subject: Python isn't English -- and that's a good thing!
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
	<919416e2-590d-48ad-9d75-80a1a4c04732@b1g2000hsg.googlegroups.com>
Message-ID: <6552cdf2-5a9e-4081-affa-6e43506ae8d7@34g2000hsh.googlegroups.com>

On May 13, 6:14 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 13, 6:32 pm, "D'Arcy J.M. Cain" <da... at druid.net> wrote:

> I once had to do a bit of scripting in AppleScript. The problem I
> found was that AppleScript tries to be so much like natural English
> that I never got a clear idea of whether something would be valid!

You have a great point here.

I recently read a blog posting that noted the same thing about Inform
7 (a specialized language used to write interactive fiction games) and
its English-like syntax.  I've read completed games in Inform 7, and
they're very easy to understand, indeed.  It does tend to read like
English, though somewhat stilted/formal/artificial.

Writing it, on the other hand (at least according to to said blog
post), is a bit more difficult.  Because the syntax is *so* English-
like, one tends to want to write things that would be natural in
English.  However, because the compiler doesn't actually understand
natural English, this frequently doesn't work.

Python, OTOH, definitely *doesn't* have this sort of impedance
mismatch for me.  Python code looks like *code*, to be sure, but the
language allows you to forget about most of the nitty-gritty details
and just get stuff done.  That's what I like about it -- *not* that
it's "English-like," in any way.


From gagsl-py2 at yahoo.com.ar  Tue May 20 19:13:49 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 20:13:49 -0300
Subject: Embedding Python question.
References: <g0u60r$qo0$1@aioe.org>
Message-ID: <op.ubg6tbggx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 06:35:23 -0300, Thomas Troeger  
<thomas.troeger.ext at siemens.com> escribi?:

> I've successfully embedded the Python interpreter into a set of C/C++  
> application programs that use a larger library project with information  
> from http://docs.python.org/api/api.html and  
> http://docs.python.org/ext/ext.html. Now I want to wrap classes and  
> functions from the associated libraries so that I can write new  
> applications completely in Python, but I'm not entirely sure how to  
> start because I have some problems understanding which is the best way.  
> It would be nice if someone could answer the following questions and  
> clarify this matter:
>
> - until now I've used the approach as documented in  
> http://docs.python.org/ext/extending-with-embedding.html to extend the  
> embedded interpreter and that works pretty well. I'd like to use a  
> similar approach for other C applications. Can I write a C library that  
> implements this technique and link it into all C applications that need  
> Python support, or is there a better, more elegant way?

(I don't get what you mean by "this technique" and how would you write a  
library)

> - in the documentation, there's an example that illustrates the creation  
> of a python module for pure extending of a python script (the Noddy  
> stuff). Do I have to make a separate module for each library I want to  
> wrap? If yes, how can I manage the case where two libraries can access  
> each other?

Normally, yes, you'd write a wrapping module for each library. If both  
access each other - well, you'd manage it the same way as you would do it  
in C; you're just providing an interfase for calling the functions from  
Python. (Hmm, maybe I have an "imagination crisis" today?)

> - if I write an extension module, how can I handle the case where the C  
> wrapper methods want to call back into the same Python interpreter  
> instance?

I think there is no problem - unless your program is multithreaded, then  
you should not release the GIL when calling into your extension if there  
is a chance the C code may call Python code.


-- 
Gabriel Genellina



From arnodel at googlemail.com  Tue May  6 11:44:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:44:06 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
	<4dbd4d59-c4e5-4910-bcfd-7e0b2b3bbcef@59g2000hsb.googlegroups.com>
Message-ID: <m2zlr35tfd.fsf@googlemail.com>

cokofreedom at gmail.com writes:
[...]
> Python is built to be easy to read,

And also very easy to *write*.  I rarely hear this, but it is the main
reason why I like Python so much.  I can't really explain why though.

[...]

(cokofreedom, I found your explanation of the virtues of Python was
excellent!)

-- 
Arnaud


From Graham.Dumpleton at gmail.com  Tue May 13 21:18:34 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Tue, 13 May 2008 18:18:34 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
	<3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com>
Message-ID: <c610ba4f-a832-451a-a997-1fb02a818e08@n1g2000prb.googlegroups.com>

On May 14, 10:58?am, Rick Dooling <rpdool... at gmail.com> wrote:
> On May 13, 7:29 pm, Con <conra... at gmail.com> wrote:
>
> > Hi, how does properly install the Python MySQL db module for Mac OS
> > X? ?I was only able to locate the Win32 modules.
>
> > Thanks in advance,
>
> > -Conrad
>
> I tried this a couple of weeks ago using macports and had problems.
>
> See, for example:
>
> http://www.davidcramer.net/code/57/mysqldb-on-leopard.html
>
> I read about several people who went in and edited the source files to
> work out the bugs on Leopard, but instead I just changed my Python
> code to use SQLite for the moment until someone fixes MySQLdb. There's
> a nice Perl script that will convert your MySQL db to an SQLite db if
> you're interested.
>
> RD

Because Python executable on Leopard has been stripped of 64 bit
architectures and thus runs as a 32 bit process, the 64 bit problems
only come up when trying to use the MySQLdb module under mod_wsgi or
mod_python with Apache (presuming you got mod_python to build as 64
bit).

If you are really stuck and can't get MySQLdb module to build as 64
bit capable, then you can force Apache to run as a 32 bit process and
avoid the problems.

For more details, see section 'Thinning The Apache Executable' of:

  http://code.google.com/p/modwsgi/wiki/InstallationOnMacOSX

Also see contributed comments to the page, which explains a way of
making Apache run as 32 bit by changing plist files rather than
thinning the Apache executable.

Graham


From bronger at physik.rwth-aachen.de  Thu May  1 13:58:12 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 19:58:12 +0200
Subject: Problems with Cheese Shop
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
	<mailman.423.1209664545.12834.python-list@python.org>
Message-ID: <87ve1xvrd7.fsf@physik.rwth-aachen.de>

Hall?chen!

Christian Heimes writes:

> Torsten Bronger schrieb:
>
>> How can I authorise to the Python Cheese Shop in order to use
>> setup.py upload?  Currently, I get
>> 
>> Upload failed (401): You must be identified to edit package
>> information
>
> Try "python setup.py register sdist upload"

I forgot to say that the package itself is already there, just not
the current release.  Is "register" still the way to go?

Thank you!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From mmanns at gmx.net  Sun May 18 16:31:55 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 18 May 2008 22:31:55 +0200
Subject: distutils directory problem
Message-ID: <g0q3nr$iah$1@aioe.org>

Hi,

I have the following problem with the distutils package:
(I have now spent hours reading and searching the manuals and tutorials,
and I am still stuck.)

I have a working directory
~/pyspread
in which my libraries are situated and two icons directories
~/pyspread/icons and ~/pyspread/icons/actions

Now I would like to create a setup.py file inside my ~/pyspread
directory that installs my .py modules in .../site-packages/pyspread
and the icons in appropriate sub-folders and adds pyspread.pth to
.../site-packages so that .../site-packages/pyspread is in the
PYTHONPATH.

However, my setup.py puts everything  (including .pyc files) into
site-packages *and* into the sub-folders. What am I doing wrong?

I am looking for a platform-independent solution. Currently, I am using
python 2.5 on Linux.

Here my setup.py

#!/usr/bin/env python

from distutils.core import setup
setup(name='pyspread',
      version='0.0.7',
      description='A spreadsheet that accepts a pure python expression in each cell.',
      license='GPL v3 :: GNU General Public License',
      classifiers=[ 'Development Status :: 3 - Alpha',
                    'Intended Audience :: End Users/Desktop',
      ],
      author='Martin Manns',
      author_email='mmanns at gmx.net',
      url='http://sourceforge.net/projects/pyspread/',
      packages=['pyspread'],
      package_dir={'pyspread': '.'},
      scripts=['pyspread.py'],
      py_modules=['pyspread.mainapp', 'pyspread.pysgrid', 'pyspread.mygrid','pyspread.icontheme'],
      package_data={'pyspread': ['icons/*.png', 'icons/actions/*.png' ,\
                                 'test.pys', 'test.csv', 'test2.csv', \
                                 'README', 'COPYING']},
)


Thanks in advance

Martin




From sjmachin at lexicon.net  Sat May 24 19:53:39 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 23:53:39 GMT
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in python coding?
In-Reply-To: <g1a5ti$7gm$00$1@news.t-online.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
Message-ID: <4838aa79$1@news.mel.dft.com.au>

Sebastian 'lunar' Wiesner wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> [ zxo102 <zxo102 at gmail.com> ]
> 
>>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
>> "\xED\x6F\x3C\x01" in python coding?
>> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
>> the error information : invalid \x escape.
> 
> [1]--> 'ED6F3C01'.decode('hex')
> Out[1]: '\xedo<\x01'
> 

FWIW the 'hex' codec is just a big fat Python-coded wrapper around the 
routines in the C-coded binascii module; here's the evidence:

 >>> '123'.decode('hex')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "c:\python25\lib\encodings\hex_codec.py", line 42, in hex_decode
     output = binascii.a2b_hex(input)
TypeError: Odd-length string


From alan.wright at volubill.com  Mon May 19 18:50:50 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 23:50:50 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<mailman.1364.1211234091.12834.python-list@python.org>
Message-ID: <D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>

Ghirai,
Scapy does the same, only it sends RST and not FIN, so still no help

 send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))

Only have windows at the moment sadly.

Alan

"Ghirai" <ghirai at ghirai.com> wrote in message 
news:mailman.1364.1211234091.12834.python-list at python.org...
> On Mon, 19 May 2008 20:25:57 +0100
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks for the feedback.
>>
>> Using the socket in a list is great
>>
>> However, as i imagined, I now get a limit of around 1500 conns before
>> the system crashes out, also i have noticed, that the ports loop back
>> to 1025 when they hit 5000.
>>
>> Any ideas on how to make the list/socket get to around 50K
>>
>> TIA
>>
>
> Try to use scapy to send raw empty packets with S flag set.
> Also use Linux/BSD if you're trying this on Windows.
>
> -- 
> Regards,
> Ghirai. 




From pavlovevidence at gmail.com  Sat May 24 07:05:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 24 May 2008 04:05:29 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com> 
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <569506e1-b5b2-45f3-9888-5f207284493f@w7g2000hsa.googlegroups.com>

On May 24, 1:56 am, cm_gui <cmg... at gmail.com> wrote:
> i'm not trying to 'troll' here.

Maybe you're not trying, but you're succeeding.

If you want to criticize be constructive about it, otherwise get out.


Carl Banks


From geonomica at gmail.com  Tue May 13 18:35:01 2008
From: geonomica at gmail.com (gianluca)
Date: Tue, 13 May 2008 15:35:01 -0700 (PDT)
Subject: python/swig
Message-ID: <186486b1-c3ef-4bbd-9742-bcaed67138b7@k13g2000hse.googlegroups.com>

Hy,
I need help indeed, about python/swig C  wrapper. Exactly, I've built
a python library from C library and it seem works. Unfortunatly, a
gruop of function that requred pointer to pointer parmeters give  me a
exception like this:
"TypeError: in method 'BestRules', argument 1 of type 'value_type **'"
I've tryed to use cpointer.i to obtain a pointer to use in function
but this don't work.
Could you help me?
thanks in advace.

Gianluca Massei

PS. this is my interface.i file:
"
%module pyRSL
%include "cpointer.i"

%{
#include "rough.h"
#include "raccess.h"
#include "rbasic.h"
#include "rclass.h"
#include "rcore.h"
#include "reduct1.h"
#include "reduct2.h"
#include "rerror.h"
#include "rset.h"
#include "rsystem.h"
#include "rule1.h"
#include "rule2.h"
%}

%include "rough.h"
%include "raccess.h"
%include "rbasic.h"
%include "rclass.h"
%include "rcore.h"
%include "reduct1.h"
%include "reduct2.h"
%include "rerror.h"
%include "rset.h"
%include "rsystem.h"
%include "rule1.h"
%include "rule2.h"
"


From p.wallstedt at gmail.com  Mon May 26 17:54:19 2008
From: p.wallstedt at gmail.com (Peter)
Date: Mon, 26 May 2008 14:54:19 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
	<8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>
Message-ID: <d7f00113-f881-480f-9051-b688b1e60c84@m36g2000hse.googlegroups.com>

On 23 Maj, 16:13, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-23, Peter <p.wallst... at gmail.com> wrote:
>
>
>
> > On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> >> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> >> > I have a small but rather annoying problem withpyserial. I want to
> >> > open a file on disk for reading and then open a com-port, write lines
> >> > from the file to the port and then read something back and compare it
> >> > to the next line in the file. Should be simple. And it is, apart from
> >> > the fact that the file seems to be doubled ...? Or it loops through
> >> > the file twice.
>
> >> > If I exclude the "import serial" it works.
>
> >> > Any ideas?
>
> >> Your problem is in line 117 of your program.
>
> > Do you have to much time?
>
> "Do you have a sense of irony?" he asked, already knowing the answer.
>
> --
> Grant

Grant - "Do you have a sence of appropriateness"? he asked, already
knowing the answer. I had no idea this is a comedy club. I might argue
that my reply was also some sort of humor, but you clearly didn't see
it that way. Maybe you should try living according to the rules you
make for others?

Diez - Did you mean the section which covers Asperger's Syndrome?

I'm just being a hacker here guys ... according to the guidelines.

It's amazing how such a simple question gets derailed immediately.
Without any light on the subject   whatsoever.




From benjamin.kaplan at case.edu  Thu May  8 12:34:50 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 8 May 2008 12:34:50 -0400
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <ec96e1390805080934i71d8d049y22f272c417866c39@mail.gmail.com>

On Thu, May 8, 2008 at 6:25 AM, Raxit at MyKavita.com <raxitsheth2000 at gmail.com>
wrote:

> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>

Python compared to C++:
You don't have to worry about memory management, which means you don't get
core dumps and destroy your computer.

Python compared to Java:
You don't have the strictly enforced type checking and object-oriented
programming, which is sometimes not needed. Also, Java was meant to be blind
to the platform, so you will have trouble accessing anything outside your
program. Python has the os, shutil, and subprocess modules that let you run
command line programs and scripts, and you can directly access the win32 API
if you are only programming for Windows. Also, Java requires the JVM to run.
With python, you can run the program through the regular python interpreter,
on the JVM (Jython), natively in Windows (IronPython or freeze it with
py2exe), and just about anywhere else you want, so people who use your
software won't have to install Python themselves.

>
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Fri May  9 04:40:15 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 08:40:15 GMT
Subject: "prove"
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <Xns9A996257DA16Dduncanbooth@127.0.0.1>

"Lucas Prado Melo" <lucaspm at dcc.ufba.br> wrote:

> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)


Language reference, mostly section 5.3 Primaries

call ::= 
             primary "(" [argument_list [","]
                            | expression genexpr_for] ")"

primary ::= 
             atom | attributeref
              | subscription | slicing | call

attributeref ::= 
             primary "." identifier

atom ::= 
             identifier | literal | enclosure


That shows fairly well how the classname.functioname bit works (it is an 
attributeref which is a primary which forms the first part of a call), 
but you'll have to wade through a fair bit of the grammar to show that 
argument_list can be an identifier.


argument_list ::= 
             positional_arguments ["," keyword_arguments]
                                     ["," "*" expression]
                                     ["," "**" expression]
                | keyword_arguments ["," "*" expression]
                                    ["," "**" expression]
                | "*" expression ["," "**" expression]
                | "**" expression

positional_arguments ::= 
             expression ("," expression)*

... and so on ...


From andre.roberge at gmail.com  Sat May 31 21:24:35 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Sat, 31 May 2008 18:24:35 -0700 (PDT)
Subject: disappearing interpreter
References: <a273de89-2f33-4e13-8ca4-0dd1674b1fc7@w4g2000prd.googlegroups.com>
Message-ID: <8ae1d4e2-3166-49b3-addb-b5b352c09558@2g2000hsn.googlegroups.com>

On May 31, 8:59 pm, oregon skip <skipjack... at clearwire.net> wrote:
> I am a new Python programmer, using Windows XP, IDLE and the
> interpreter. Everything is
> OK except that when I double check a name.py file it runs on the
> interpreter, but the
> window disappears before I can see what happened. Any suggestions?

This is because the entire program runs ... and ends quickly.

Try to add the following line:

raw_input("Done.  Press the enter key to quit.")

Andr?


From anton.hartl at gmail.com  Tue May 20 18:19:26 2008
From: anton.hartl at gmail.com (Anton Hartl)
Date: Tue, 20 May 2008 22:19:26 +0000 (UTC)
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
Message-ID: <slrng36jj3.1g63.ah@hugin.c0defeed.de>

On 2008-05-20, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Salvatore DI DI0 schrieb:
>> Hello,
>> 
>> The Processing Graphics language has been implemented in Javascript.
>
> No, it hasn't. Processing is written in Java.

Yes, it really has been implemented in Javascript:

    http://ejohn.org/blog/processingjs/

-Anton


From straton at lampsacos.demon.co.uk  Sun May 18 11:08:49 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 16:08:49 +0100
Subject: Write bits in file
In-Reply-To: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <g0pgq5$68d$1$8300dec7@news.demon.co.uk>

I admit that I was mostly just interested in getting your
question clarified, rather than having any great experise.

But a bit of Googling took me to the 'Bit vector' module,
[I googled: 'python ("bit array" OR "bit vector")']
which might be what you are after. I have no experience
with it, myself:

http://cobweb.ecn.purdue.edu/~kak/dist/BitVector-1.4.1.html

Monica Leko wrote:
> On May 18, 2:20 pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
> 
> Yes.
> 
>> is the 10-bit
>> bit-pattern to be stored at an arbitrary bit-position in
>> the file
> 
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.
> 
> 


From yves at zioup.com  Fri May  9 11:08:51 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 15:08:51 GMT
Subject: python newbie: some surprises
In-Reply-To: <mailman.844.1210314193.12834.python-list@python.org>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>	<VHQUj.124646$Cj7.90968@pd7urf2no>
	<mailman.844.1210314193.12834.python-list@python.org>
Message-ID: <7OZUj.125622$rd2.29080@pd7urf3no>

Gabriel Genellina wrote:

>> I see the point of the OP. Couldn't the new-line be used as an 
>> equivalent of   ':', for example, do you find this difficult to read:
>>
>> if a == 3
>>    do_something()
>>
>>
>> if a == 3: do_something()
> 
> Yes, it could be done, there are no technical reasons to always force to 
> use ":". But AFAIK the main reasons to keep ":" are internal consistency 
> (an inner block always starts with ":"; incidentally, that's easier to 
> handle for editors) and legibility (the ":" stands for itself and has a 
> meaning)

Legibility ?
But one could make the same argument for curly brackets, and we seem to be 
doing fine without them !

I have become so used to the power of indenting in python that I keep 
forgetting the colon, and this is getting worse as I do more python, not 
better. Maybe I'll write myself a "pre-compiler" that add the colons where 
the compiler needs them :-)


Yves.
http://www.SollerS.ca



From hdante at gmail.com  Fri May 16 08:20:19 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 05:20:19 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
Message-ID: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>

On May 16, 7:16?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> ? Hi All,

 Hello, :-)

>
> I'm trying to write a multi threaded TPC server. I have used xmlrpc

 How exactly did you come to the conclusion that your server must be
multi threaded ?


> - I have to send larger amounts of data, the overhead of converting to
> XML and parsing XML back would be too much pain

 - What's the expected amount of data you have to transfer ?
 - What's the expected network bandwidth ?
 - What's the expected acceptable transfer time ?
 - How many users are expected to be transfering data at the same
time ?

> I have looked at various solutions including:
>
> - PyOrbit - too heavy weight
> - Pyro - uses pickle, I do not trust it

 Did you consider gzipping your XML (or YAML) packets ? Would the
transfer time be acceptable in this case ?

>
> BTW I do not care about the clients - they must trust the server side.

 Oh, he said he _doesn't care about the clients_ ! ;-)

> In contrast, the server should not receive anything from the clients
> that is dangerous. I would like to use something that is fast, and can
> only transfer data, not code. For this reason I think I cannot use the
> marshal module because it is able to marshal code objects. I think I'm
> going to implement my own "pickler" over xdrlib, that will only
> pack/unpack data, NOT code. (It would also have the advantage that
> others could write clients in different languages.)

 In general I would avoid that. Try to better estimate the speed
requirements, to see if you really need do to this.

>
> Before I start re-inventing the wheel:
>
> - Is there another (already existing) higher level framework that I can
> try? It should be safe and fast, that is the only restriction.

 There's "Twisted".
 http://twistedmatrix.com/projects/core/documentation/howto/servers.html

> - Do you think that it is a good idea to use xdrlib? I haven't seen
> projects using it directly. For me it is like the rotor module was - it

 It's probably the best way to send binary stuff over the network.
But, again, I would avoid doing so.

> was there but almost nobody used it. There might be a better lower level
> library which I don't know of.
>
> Thank you,
>
> ? ?Laszlo



From Scott.Daniels at Acm.Org  Tue May 20 00:12:45 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 19 May 2008 21:12:45 -0700
Subject: test mult vars to same value, how to shorten expr?
In-Reply-To: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <yuSdnTXTPuQt0K_VnZ2dnUVZ_oTinZ2d@pdx.net>

notnorwegian at yahoo.se wrote:
>  if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:
How about:

     if 5 == a == b == c == ... z:
         ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From grante at visi.com  Fri May  2 10:40:10 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:40:10 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <mu2dnYnNde1XuobVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> The specified command takes the form of a fully-qualified file
> path, and zero or one arguments to the program. That command
> is then executed by the kernel, and the Python program file is
> passed as input to the resulting process.

Just to clarify that a bit a little, the name of the file (as
it was given to the "exec" system call) containing the "shebang
line" is passed to the resulting process as a command-line
parameter.

>> Why is one preferred over the other one ?
>
> I've never clearly understood why people want to use "#! /usr/bin/env
> python", which is prone to finding a different Python from the one
> installed by the operating system. I'd be interested to see what
> responses are in favour of it, and what the reasoning is.
>
> One possible reason is that the programmer is attempting to allow for
> systems where Python has been installed, but not from an operating
> system package.

Exactly.  the "env" approach works as long as python is
installed somewhere on the PATH.  "#!/usr/bin/python" will fail
if python is installed in /usr/local/bin/python.

-- 
Grant



From __peter__ at web.de  Tue May 13 05:01:09 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 11:01:09 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
	<g0bl2e$ft9$00$2@news.t-online.com>
Message-ID: <g0blcj$ft9$00$3@news.t-online.com>

Peter Otten wrote:

> # use at your own risk
> import numpy
> 
> N = 10**4 # I get a MemoryError for a bigger exponent
> b = numpy.array(range(N))
> a = numpy.zeros((N, N)) + b
> a *= a.transpose()
> a[0,0] = (b*b).sum()
> print a

Sorry, this is nonsense. 



From mattheww at chiark.greenend.org.uk  Mon May 12 16:48:17 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 12 May 2008 21:48:17 +0100 (BST)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <Dqd*eTIcs@news.chiark.greenend.org.uk>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning 
> Python" each night. Does anyone see any value in learning Python when you 
> don't need to for school, work, or any other reason? I mean, sure, there's 
> value in learning anything at any time, but for something like a programming 
> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.

> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off, but for the most part I'm 
> wondering what people's thoughts are as far as simply learning it for the 
> sake of learning. Does it seem like a silly endeavor to most people? Did 
> anyone here learn a programming language when you didn't need to? If so, how 
> much and in what capacity did you use it after you learned it?

I can't tell from what you wrote whether you feel you won't have any
reason to do any programming, or whether you already know several other
programming languages and you feel you won't have any reason to use
Python in particular.

If it's the former, I don't think you need to worry. If you ever find
yourself doing a repetitive task using a computer, or find that you're
using a program which does nearly-but-not-quite what you want, there
are good chances that there'll be a way to write a program to help.

-M-



From paul at boddie.org.uk  Mon May 26 05:14:19 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 26 May 2008 02:14:19 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>

So much to respond to here, so let's get it over with in one post...

On May 25, 2:32 pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> > On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > From whom are you trying to hide your attributes?
>
> > I saw this "don't need it" pattern in discussions about the ternary
> > "if..else" expression and about "except/finally on the same block
> > level". Now Python has both.

Well, there was no need to exclude try...except...finally in the first
place - Guido doubted the semantics of such a thing until he saw it in
Java, apparently. This is arguably one of the few features that has
incurred little cost with its addition, in contrast to many other
changes made to Python these days. Which brings us to the ternary
expression - something which will presumably see unprecedented usage
by those who jump on every new piece of syntax and "wear it out" in
short order.

Interestingly, Python did have an "access" keyword at some point
(before 1.4, I believe), so it isn't as if no-one had thought about
this before.

[...]

> > > Who taught you that enforced restrictions on attribute access was a
> > > "basic principle" of OO?
>
> > Nearly every introduction to OOP? Please don't tell me that
> > encapsulation
> > does not mean "enforced restriction". If the language has no syntactic
> > support for encapsulation then it does not have encapsulation. Similar
> > argument applies to Java where programmers sometimes claim that Java
> > "has" properties because of setCrap/getCrap.

But is "enforced restriction" essential in OOP? Note that languages
like C++ provide such features in order to satisfy constraints which
are not directly relevant to Python.

[...]

On May 26, 6:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
>
> I've always considered the underscore conventions in Python an ugly
> hack in an otherwise elegant language. I often avoid them even when
> they technically belong just because I don't like the way they make my
> code look.

To be honest, I don't really like putting double underscores before
names just to make sure that instances of subclasses won't start
trashing attributes of a class I've written. (I actually don't care
about people accessing attributes directly from outside instances
because I've seen enough "if only they hadn't made that private/
protected, I could do my work" situations in languages like Java.)
Indeed, I experienced a situation only yesterday where I found that I
had been using an instance attribute defined in a superclass (which
was arguably designed for subclassing), but was the author really
expected to prefix everything with double underscores? Of course, by
not enforcing the private nature of attributes, Python does permit
things like mix-in classes very easily, however.

If anything, Python lacks convenient facilities (besides informal
documentation) for describing the instance attributes provided by the
code of a class and of superclasses. Of course, the dynamic
possibilities in Python makes trivial implementations of such
facilities difficult, but having access to such details would make
errors like those described above less likely. I imagine that pylint
probably helps out in this regard, too.

[...]

> I am also bothered a bit by the seeming inconsistency of the rules for
> the single underscore. When used at file scope, they make the variable
> or function invisible outside the module, but when used at class
> scope, the "underscored" variables or functions are still fully
> visible. For those who claim that the client should be left to decide
> what to use, why is the client prohibited from using underscored
> variables at file scope?

I don't remember why this is. I'll leave you to track down the
rationale for this particular behaviour. ;-)

> I may be full of beans here, but I would like to make a suggestion.
> Why not add a keyword such as "private," and let it be the equivalent
> of "protected" in C++? That would make member variables and functions
> visible in inherited classes. The encapsulation wouldn't be as
> airtight as "private" in C++, so clients could still get access if
> they really need it in a pinch, but they would know they are bending
> the rules slightly. I realize that single underscores do that already,
> but they are just unsightly.

If anything, I'd prefer having private attributes than some kind of
protected attributes which don't actually offer useful protection
(from accidental naming collisions).

Paul


From inhahe at gmail.com  Sun May 18 17:38:17 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 17:38:17 -0400
Subject: Compress a string
Message-ID: <Jk1Yj.144435$Er2.17735@bignews6.bellsouth.net>

I forgot a line that says, "lc = c"
i should really test my stuff.

"inhahe" <inhahe at gmail.com> wrote in message news:...
>i see lots of neat one-liner solutions but just for the sake of argument:
>
> def compress_str(str):
>     new_str = ""
>     lc = ""
>     for c in str:
>        if c != lc: new_str.append(c)
>     return new_str
>
>
> "Matt Porter" <mabbikeel at gmail.com> wrote in message 
> news:mailman.1315.1211133997.12834.python-list at python.org...
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"
>>
>> The code I have so far feels like it could be made clearer and more 
>> succinct, but a solution is currently escaping me.
>>
>>
>>
>>
>> Cheers
>> Matt
>> -- 
>> --
>>
>
> 




From hdante at gmail.com  Sat May 17 23:25:18 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Sat, 17 May 2008 20:25:18 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>

On May 17, 7:32?pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
>
> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
>
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

 I guess that python is not a good language for that. Algorithms
implemented in plain python are many times slower than C ones
(hundreds ?). In practice, algorithms are written in C and wrapped in
python. I have near zero experience in operations research, but once I
looked for linear programming toolkits for python and IIRC, I only
could find a trivial wrapper for glpk (called pulp).

 My opinion: choose compiled or byte compiled languages. Choose the
language paradigm that best suit the algorithms.


From iainking at gmail.com  Thu May 15 04:31:17 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 15 May 2008 01:31:17 -0700 (PDT)
Subject: Rename field in Access DB
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
	<mailman.1120.1210778987.12834.python-list@python.org>
Message-ID: <b6579c4c-5a94-45ed-8aab-a1134f3d9748@d77g2000hsb.googlegroups.com>

On May 14, 4:29 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> Iain King wrote:
> > I'm manipulating an MS Access db via ADODB with win32com.client.  I
> > want to rename a field within a table, but I don't know how to.  I
> > assume there is a line of SQL which will do it, but nothing I've tried
> > (from searching) has worked.
> > Basic code:
>
> > import win32com.client
> > connection = win32com.client.Dispatch(r'ADODB.Connection')
> > DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> > connection.Open(DSN)
> > connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> > doesn't work
> > connection.Close()
>
> <code>
> import os, sys
> from win32com.client.gencache import EnsureDispatch as Dispatch
>
> DATABASE_FILEPATH = r"c:\temp\test.mdb"
> CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
>   DATABASE_FILEPATH
>
> if os.path.exists (DATABASE_FILEPATH):
>    os.remove (DATABASE_FILEPATH)
>
> adox = Dispatch ("ADOX.Catalog")
> adox.Create (CONNECTION_STRING)
> adox = None
>
> db = Dispatch ('ADODB.Connection')
> db.Open (CONNECTION_STRING)
> try:
>   db.Execute ('CREATE TABLE dtest (id INT, data INT)')
>   db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')
>
>   try:
>     db.Execute ('SELECT id, newdata FROM dtest')
>   except:
>     print "FAILED as expected"
>   else:
>     print "SUCCEEDED unexpectedly"
>
>   try:
>     db.Execute ('SELECT id, data FROM dtest')
>   except:
>     print "FAILED unexpectedly"
>   else:
>     print "SUCCEEDED as expected"
>
>   adox = Dispatch ("ADOX.Catalog")
>   adox.ActiveConnection = db
>   adox.Tables ("dtest").Columns ("data").Name = "newdata"
>   adox.Tables.Refresh ()
> finally:
>   db.Close ()
>
> db = Dispatch ('ADODB.Connection')
> db.Open (CONNECTION_STRING)
> try:
>
>   try:
>     db.Execute ('SELECT id, data FROM dtest')
>   except:
>     print "FAILED as expected"
>   else:
>     print "SUCCEEDED unexpectedly"
>
>   try:
>     db.Execute ('SELECT id, newdata FROM dtest')
>   except:
>     print "FAILED unexpectedly"
>   else:
>     print "SUCCEEDED as expected"
>
> finally:
>    db.Close ()
>
> </code>
>
> TJG


Excellent, many thanks.

Iain


From maxinbjohn at gmail.com  Thu May  8 07:38:12 2008
From: maxinbjohn at gmail.com (maxinbjohn)
Date: Thu, 8 May 2008 04:38:12 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
Message-ID: <12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>

Hi Raxit,

One of the the tempting features of Python is that it is fun to code
in Python. If you are really trying to learn python, you should read
Adventures with Neko (http://gnuvision.com/books/pybook/) . It is an
introductory book on Python programming for school children by Mr.
Pramode CE.

It is fun for children (when I tried it, me too liked it) to do
programming with Neko, the cat. I am sure that it will be a fun filled
learning experience for you.

Regards,

Maxin B. John

pistacchio wrote:
> Raxit at MyKavita.com ha scritto:
> > Hi,
> >
> > i was reading/learning some hello world program in python.
> > I think its very simillar to Java/C++/C#. What's different (except
> > syntax) ?
> >
>
> well, it's similar in the sense that it is a programming language. So
> you can say that assembly is similar to BASIC, but that both are
> different from finnish, but from a programmer's point of view, they're
> all rather different languages.
>
> > what can i do easily with python which is not easy in c++/java !?
> >
>
> generally speaking python is said to be easier to pick up for a pletora
> of reasons. technically speaking, it is not, for example, strongly
> typed, nor it forces you to use a programming paradigm like object
> oriented programming.
> This means that if you just want to see your name printed on the screen
> you can simply write:
>
> print "raxit"
>
> and get the work done. to understand it you just have to understand some
> basics like what is a string and what is a statement.
>
> in java, for example, it would look like:
>
> public class HelloWorld {
>       public static void main(String[] args) {
>           System.out.println("raxit");
>       }
>   }
>
> in short, to obtain the same result (limited to this case) you have to
> write 650% more code and you're forced to know what is a class, what
> namespace means, what is a function (and arguments) and what are methods
> and the dot notation and an array. not that you won't encounter all of
> them learning python, but you're presented with all of them, all at
> once, in the moment where you just want to write the simplest program.
> that's why a typical java beginner's guide starts with ditto examples
> and adds: "ignore everything for the moment". i hate when i have to
> ignore things of a code that i'm writing!
>
> the same applies to C# and, to a certain extend, C++ that is a much
> older language and present different learning problems.
> Now, what can you do with python? Virtually everything (network
> programming, game programming, server side scripting). In most cases, it
> would run slower than it would do with the other languages (even slower
> than the slow java). You won't do drivers or kernels in python, but you
> won't even code them in java or C#.
> the programs you'll write will mostly run on a number of different
> platform, like java programs. porting a c++ is a bit tougher. at the
> moment there is project (mono) that is porting the .net platform (where
> c# runs) to multiple platforms, but basically, if you write a c# program
> you're programming for windows.
> hope it helps
>
>
>
> > Tnx,
> > Raxit
> > www.mykavita.com


From upton at virginia.edu  Wed May 21 12:00:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:00:44 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805210900w47ad3a81mc7b433d18b7a6059@mail.gmail.com>

On Wed, May 21, 2008 at 11:34 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> For example, consider the two statements:
>
>     x = 8
>     x = 10
>
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".

Sounds to me like the teacher is being difficult, and IIRC,  you've
talked about having elementary school kids write in FT -- I don't
think asking "does this make sense to you" of elementary school kids
is necessarily the best metric for PL syntax/semantics.

> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).
>
> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.

If you can't do, or don't like, math, you probably shouldn't be
programming.  If you don't have any symbolic reasoning skills, you're
largely limited to "Hello, World."

> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:
>
> Set QuadraticEquation to a*x^2 + b*x + c = 0.

You keep trotting out this quadratic equation example, but does FT
actually have any kind of useful equation solver in it?  Or does it
just allow you to do something like

Set QuadraticEquation to a*x^2 + b*x + c = 0.
Set a to 1.
Set b to 0.
Set c to -25.
Set x to 5.
If QuadraticEquation is True then do ....


From mblume at socha.net  Wed May 28 13:19:27 2008
From: mblume at socha.net (mblume)
Date: 28 May 2008 17:19:27 GMT
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org>
	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
Message-ID: <483d941f$0$9032$5402220f@news.sunrise.ch>

Am Tue, 27 May 2008 12:37:34 -0700 schrieb Dennis Lee Bieber:
> 
> 	From the library reference:
> """
> Support for the %Z directive is based on the values contained in tzname
> and whether daylight is true. Because of this, it is platform-specific
> except for recognizing UTC and GMT which are always known (and are
> considered to be non-daylight savings timezones). """
> 
> 	The only value that passed for me was UTC (I didn't try GMT) but...
> 
For me, only UTC, GMT, CET and CEST (Central European [Summer] Time) work.
My time.tzname is ('CET', 'CEST').
I think the documentation must be read that ***only*** 
UTC,GMT,time.tzname work.

Also, time zone names are not unique: EST can be Eastern Summer Time (US) 
as well as Eastern Summer Time (Australia).

For working with time zones, I think that a module like pytz
http://pytz.sourceforge.net/
may be better suited.

My 0.02c.
Martin


From cbhoem at gmail.com  Thu May  1 09:02:35 2008
From: cbhoem at gmail.com (cbhoem at gmail.com)
Date: Thu, 1 May 2008 06:02:35 -0700 (PDT)
Subject: Cookie Confusion - How to Set a Cookie
References: <588d6a6c-0080-48a4-b768-e2c5ef551790@s50g2000hsb.googlegroups.com>
	<cc4194a8-ca9f-4e91-a67d-8096d717e165@b64g2000hsa.googlegroups.com> 
	<bb13634a-ff00-49c1-b07b-34ea4dd448d7@a70g2000hsh.googlegroups.com> 
	<94d81004-fc6d-4ff9-9500-143864a6d7a7@f63g2000hsf.googlegroups.com>
Message-ID: <eb94abcb-3172-458c-beba-65680b307818@b64g2000hsa.googlegroups.com>

On Apr 29, 3:35 pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
> > Thanks for the code, Aaron.  I will give it a try.
>
> > I've been reading some more about cookielib and am not sure whether I
> > should use Cookie or cookielib.  This is what I want to do:  a user is
> > going to login.  Upon a successful login, I want to write their name
> > and date/time of visit to a cookie file. Which is the correct python
> > module to use?
>
> Cookie does parsing and generation of cookie strings
> for server-side applications like your CGI script.
>
> The cookielib module
> is designed for either implementing a client like a web browser
> or emulating a client/browser (for web scraping, for example).
>
> I think you want to use Cookie.
> The distinction could be made clearer in
> the docs, imho.
>
> Also, when you say "write the cookie file" I think you mean
> "store the cookie to the client browser".  This should happen
> automatically when you send the cookie header to the client
> correctly (if the client is configured to cooperate).
>
>   -- Aaron Watters
>
> ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=default+does+n...


Sorry for the slow replies.  I've been in & out with a sick child.

I'm used to my javascript cookies.  They are automatically written to
a cookie.txt file in a .mozilla dir under my user.  When I say to
'write the cookie file' this is what I was referring to.  I was
expecting my python cookie to automatically get written to the same
file.  I have't seen this happen yet.


From alex.m.gusarov at gmail.com  Tue May 27 07:20:24 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:20:24 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
In-Reply-To: <db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>
Message-ID: <ac6dcb3d0805270420n2671c1c0n77893fd54a395f79@mail.gmail.com>

> class MultiHandler(object):
>        def __init__(self, owner, *initial_handlers):
> ...
> ...
> ...
> calendar = Calendar()
> calendar.on_paint = MultiHandler(calendar, Calendar.on_paint)
>
> calendar.on_paint()
> calendar.on_paint += handler1
> calendar.on_paint()
> calendar.on_paint += handler2
> calendar.on_paint()

Marek, this seems exactly what I want, thanks, I will try it.
Thanks everybody. Yes, I'm newbie, so may be it was a dumb question,
don't judge me.

--
Best regards, Alex Gusarov


From sposnjak at gmail.com  Mon May  5 09:41:08 2008
From: sposnjak at gmail.com (Simon Posnjak)
Date: Mon, 5 May 2008 15:41:08 +0200
Subject: How to convert unicode string to unsigned char *
Message-ID: <725404980805050641s52cac3b8mf238ff29883c6dba@mail.gmail.com>

Hi!

I have a C module for which I created a wrapper with swig. The function def is:

C:

int some_thing(unsigned char * the_str);

eg:

Python:

some_module.some_thing (the_str)

Now I would like to feed it with a UTF-8 formatted string:

test = u'Make \u0633\u0644\u0627\u0645, not war.'

If I try:

some_module.some_thing (test)

I get:

TypeError with message: in method 'some_thing', argument 1 of type
'unsigned char *'

I also tried to pack the string into array or struct but I can not get
it to work.

What would be the best solution for this problem?

[I am working on Windows]

Regards Simon


From pavlovevidence at gmail.com  Wed May 28 22:38:27 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 28 May 2008 19:38:27 -0700 (PDT)
Subject: FW: php vs python
References: <mailman.1701.1212008396.12834.python-list@python.org> 
	<1cc9a56b-c1d4-4fad-968b-a87684ccfc12@l64g2000hse.googlegroups.com>
Message-ID: <dff8b18c-1d99-468a-9dfd-bb1d23b5c22a@r66g2000hsg.googlegroups.com>

On May 28, 7:45 pm, blaine <frik... at gmail.com> wrote:
> On May 28, 4:47 pm, "Phil Runciman" <ph... at aspexconsulting.co.nz>
> wrote:
>
>
>
> > -----Original Message-----
> > From: Jerry Stuckle [mailto:jstuck... at attglobal.net]
> > Sent: Wednesday, 28 May 2008 1:48 p.m.
> > To: python-l... at python.org
> > Subject: Re: php vs python
>
> > Ivan Illarionov wrote:
> > > On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>
> > >> Greetings, Ivan Illarionov.
> > >> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>
> > >>>> As I've said before - good programmers can write good code in any
> > >>>> language.
> > >>> Yes, they can. But it may be harder to do for them in one language
> > and
> > >>> easier in another.
> > >> It's obvious lie. If you have clear mind and you know language you're
> > >> using, there are absolutely NOTHING can deny you to write clear code.
> > >> Even using forth postfix notation, I have no problem writing good
> > code,
> > >> it's as easy as writing bad code. And yes, I do see the difference.
>
> > > No. Language does matter.
>
> > Yes it does matter.
>
> > I have programmed in many assembly and higher level languages.
>
> > In OldenTimes:
> > In Algol 60 I was productive from the start.
> > KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
> > made it even better).
> > IBM 360 Assembly was poorer but not a disaster.
> > PL1 was a mess. You could write good code but why bother?
> > COBOL was fit for purpose and when combined with Jackson structured
> > programming could be used straight away by rooky programmers in business
> > systems programming. I am sure it has progressed since ANSI 68.
>
> > The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
> > if language does not matter?
>
> > My 2c worth.
>
> http://www.fukung.net/v/7729/php_vs_python.png
> :)

Ha ha.  Took me a second.

Carl Banks


From mensanator at aol.com  Thu May 15 15:24:59 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 15 May 2008 12:24:59 -0700 (PDT)
Subject: Computer
References: <b9771c23-7119-4f8f-8387-b54f6a7197aa@f24g2000prh.googlegroups.com>
Message-ID: <e3ad9786-1a17-42c8-ac92-4e7471655572@m45g2000hsb.googlegroups.com>

On May 15, 1:14?pm, gaojihuiyuan <gaojihuiy... at yahoo.cn> wrote:
> Plastic Coat Your Cedar with EPL
> EPL is a clear thin polymer coat that will maintain the bright cedar
> wood look. Buy online today.http://www.healthhuman.com.cn/Computer.htm
>
> Cedar Wood
> Find Deals on Cedar Wood and other Home & Garden Products at DealTime.
> Choose from millions of deals. Save time and money every time you
> shop.http://www.healthhuman.com.cn/Computer.htm
>
> Cedar Wood - Bargain Prices
> Shop fast, Buy smart, Shopzilla for Wood Outdoor Furniture and other
> Furniture and Outdoor Decor. Every product from every store means you
> get a Bargain Price. Don't just shop, Shopzilla.http://www.healthhuman.com.cn/Computer.htm

I'll keep that in mind the next time I buy a wooden computer.


From http  Wed May  7 02:02:11 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:02:11 -0700
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <7x3aouejoc.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
> if the idea is to maximize the popularity, GPL is a worse bet.

That is not a valid inference.  Look at the popularity of Linux vs
BSD, for example.


From wizzardx at gmail.com  Thu May  8 08:49:37 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 14:49:37 +0200
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>

On Thu, May 8, 2008 at 2:11 PM, Michael Mabin <d3vvnull at gmail.com> wrote:
> Does python have an equivalent to Perl's inplace-edit variable $^I?
>

I misread your question.

No, Python eschews magic characters and symbols. They make code ugly
and harder to read and maintain.

The first 3 lines of the Zen of Python:

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.

You might find a variable like that in Ruby, which has strong Perl influences.

David.


From wojtek.gminick.walczak at gmail.com  Mon May  5 08:17:37 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Mon, 5 May 2008 14:17:37 +0200
Subject: pygame music, cant read mp3?
In-Reply-To: <5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
Message-ID: <2c3c21060805050517j49f84ac1u52e288d18db11aea@mail.gmail.com>

2008/5/5, globalrev <skanemupp at yahoo.se>:
> pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')


Are you sure that:

os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?

Check it with python.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From skunkwerk at gmail.com  Mon May 12 15:29:16 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:29:16 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<SeWdnTmd7Z7HwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com>
Message-ID: <a8d1d958-74e8-4bde-8260-9e5c06c2954f@n1g2000prb.googlegroups.com>

On May 11, 1:55 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sun, 11 May 2008 09:16:25 -0700 (PDT),skunkwerk
> <skunkw... at gmail.com> declaimed the following in comp.lang.python:
>
>
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?  It wouldn't help having a .pyc or using
> > psycho, correct, as the time is being spent in the runtime?  something
> > along the lines of 'start a new thread every minute until you get to a
> > 100' without blocking the execution of the rest of the code in that
> > file?  or maybe any time i need to do a search, start a new thread if
> > the #threads is <100?
>
>         Is this running as part of the server process, or as a client
> accessing the server?
>
>         Alternative question: Have you tried measuring the performance using
> /fewer/ threads... 25 or less? I believe I'd mentioned prior that you
> seem to have a lot of overhead code for what may be a short query.
>
>         If the .get_item() code is doing a full sequence of: connect to
> database; format&submit query; fetch results; disconnect from
> database... I'd recommend putting the connect/disconnect outside of the
> thread while loop (though you may then need to put sentinel values into
> the feed queue -- one per thread -- so they can cleanly exit and
> disconnect rather than relying on daemonization for exit).
>
> thread:
>         dbcon = ...
>         while True:
>                 query = Q.get()
>                 if query == SENTINEL: break
>                 result = get_item(dbcon, query)
>                 ...
>         dbcon.close()
>
>         Third alternative: Find some way to combine the database queries.
> Rather than 100 threads each doing a single lookup (from your code, it
> appears that only 1 result is expected per search term), run 10 threads
> each looking up 10 items at once...
>
> thread:
>         dbcon = ...
>         terms = []
>         terminate = False
>         while not terminate:
>                 while len(terms) < 10:
>                         query = Q.get_nowait()
>                         if not query: break
>                         if query == SENTINEL:
>                                 terminate = True
>                                 break
>                         terms.append(query)
>                 results = get_item(dbcon, terms)
>                 terms = []
>                 #however you are returning items; match the query term to the
>                 #key item in the list of returned data?
>         dbcon.close()
>
> where the final select statement looks something like:
>
> SQL = """select key, title, scraped from ***
>                         where key in ( %s )""" % ", ".join("?" for x in terms)
>         #assumes database adapter uses ? for placeholder
> dbcur.execute(SQL, terms)
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com         wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

thanks again Dennis,
   i chose 100 threads so i could do 10 simultaneous searches (where
each search contains 10 terms - using 10 threads).  the .get_item()
code is not doing the database connection - rather the intialization
is done in the initialization of each thread.  so basically once a
thread starts the database connection is persistent and .get_item
queries are very fast.  this is running as a server process (using
django).

cheers


From irmen.NOSPAM at xs4all.nl  Sat May 10 10:22:52 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 10 May 2008 16:22:52 +0200
Subject: Simple question
In-Reply-To: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <4825afc8$0$14350$e4fe514c@news.xs4all.nl>

Gandalf wrote:
> On May 10, 2:36 pm, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Gandalf wrote:
>>> how can i ran script with python
>> It depends on your web server configuration. To get your web server
>> execute Python code, there are several alternatives like
>>
>> * CGI
>> * FastCGI
>> * mod_python
>>
>> Regards,
>>
>> Bj?rn
>>
>> --
>> BOFH excuse #93:
>>
>> Feature not yet implemented
> 
> my server is my computer and all i did way to install python on it.


You might want to read a bit more about Python and how it can be used for web 
programming. Because your question is not easily answered.

I suggest the following at least:

http://wiki.python.org/moin/PythonVsPhp
	(especially the "Compared as Web Development Frameworks" section)

http://wiki.python.org/moin/WebProgramming



Good luck.

--irmen


From inhahe at gmail.com  Mon May 26 15:52:23 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:52:23 -0400
Subject: Question about wsgi.input
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
	<6a0htmF35sj8eU1@mid.uni-berlin.de>
Message-ID: <wwE_j.50552$7a.48515@bignews1.bellsouth.net>

That's what I would have thought, just seems strange since it seems to imply 
that if I use StringIO or cStringIO, then whenever i write to it i have to 
save the position, seek to the end, write, and then seek to the position i 
saved.  Are there any other classes that are more suitable for pipes, but 
qualify as 'file-like objects'?

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:6a0htmF35sj8eU1 at mid.uni-berlin.de...
> inhahe schrieb:
>> I'm sorry if this is off-topic, i couldn't find a mailing list OR forum 
>> for WSGI (and #wsgi wasn't very helpful).
>>
>> i played around with StringIO, and apparently if you write to a stringio 
>> the position gets set to the end of the write, so if you read from it 
>> again, without using seek, you won't read what comes next, you'll skip to 
>> the end of the write.  and if you write without seeking to the end first, 
>> you'll overwrite part of the string if the reading hasn't caught up.
>>
>> WSGI says that wsgi.input should block if there's more data to be read 
>> from the socket, until that data is available. so when the server writes 
>> to the file object, what happens to the file position? if i were writing 
>> a WSGI app, i would just seek() to the last place my read ended at just 
>> to make sure.  but i'm making a server, so i need to know whether i 
>> should leave the position at the end of the write, when it blocks (or for 
>> that matter, if i'm writing while it's still reading), or at the end of 
>> the previous read?
>
> I'm not sure exactly about what you are talking here - but generally, 
> wsgi.input should be considerd being a pipe. One (the server) simply 
> writes into it. The WSGI-app just reads. No seek.
>
> Diez 




From johnroth1 at gmail.com  Sun May 25 09:17:58 2008
From: johnroth1 at gmail.com (John Roth)
Date: Sun, 25 May 2008 06:17:58 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
Message-ID: <f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>

On May 24, 7:22 am, Andr? <andre.robe... at gmail.com> wrote:

>
> I can't relate to anyone that want to oppose a change that would give
> more freedom to a programmer.
>
> Andr?

Well, you can already do that. Or anything else you want. It's not all
that difficult to change the algorithms in the unittest package
_without_ patching the code. How to do it could be better documented,
granted.

For my major project (Python FIT) I've got my own test case extraction
mechanism that doesn't depend on patching the code. It lets me use any
name I want - that is, it doesn't depend on any kind of pattern match.
(It also avoids looking in subclasses for tests.) I find the naming
freedom to be quite useful in thinking about the test case.

I really don't care what the OP does in his own projects. My objection
is that, if it goes into the standard library, is that it passes a
signal that it's good practice to allow dependencies between tests. It
most definitely is _not_ good practice.

I like the technique of looking at the line numbers to get the
declaration order; it ought to be documented somewhere.

The proper place for this is either a recipe (
http://aspn.activestate.com/ASPN/Cookbook/Python/ ) or a note in the
documentation with a caveat that it's not good practice, but it may be
useful in some circumstances.

John Roth





From kyosohma at gmail.com  Tue May 20 17:16:20 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 14:16:20 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
	<mailman.1395.1211312728.12834.python-list@python.org> 
	<f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com> 
	<mailman.1399.1211316259.12834.python-list@python.org>
Message-ID: <83b42c06-22e3-4818-af47-6aa419336ed2@l28g2000prd.googlegroups.com>

On May 20, 3:43?pm, Christian Heimes <li... at cheimes.de> wrote:
> Mike Driscoll schrieb:
>
>
>
> > On May 20, 2:45 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> >> Bob Greschke wrote:
> >>> This MUST have been asked before, but I can't seem to Google the right
> >>> thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> >>> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
> >> A couple of options to get the ball rolling:
>
> >> 1) win32api.GetLogicalDriveStrings()
>
> > I gave this a go to see how it worked and ti gave me this:
>
> > 'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
> > \x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'
>
> > Not exactly what I expected. Do I have to parse out the "\\\x00"
> > myself or is there an information level switch I should add?
>
> The data is separated by NUL bytes. Split it with \x00 and you'll get a
> list of drives:
>
> "A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00".split("\x00")
> ['A:\\', 'C:\\', 'D:\\', 'G:\\', 'I:\\', 'L:\\', 'P:\\', 'Q:\\', 'R:\\',
> 'U:\\', 'X:\\', 'Y:\\', 'Z:\\', '']
>
> Christian

Yeah, I noticed that. I just thought that was a weird piece of info
for the call to return.

Mike


From jaywgraves at gmail.com  Fri May 16 17:21:57 2008
From: jaywgraves at gmail.com (jay graves)
Date: Fri, 16 May 2008 14:21:57 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <8f70d02b-2626-4d50-8d2e-7656b925987e@d1g2000hsg.googlegroups.com>

On May 16, 3:24 pm, globalrev <skanem... at yahoo.se> wrote:
> On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
> > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
> > > i extract info from one file and put it into a dictionary.
> > > i want to save that dictionary for later use, how do i do that?
> > > might save a list of dictionaries or a list of classobjects too if
> > > there is any difference.
> > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html

> pickle.dumps(mg)
> pickle.load(mg)
>
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

It's best to post a minimal set of code that exhibits your error.
You aren't saving the output of pickle.dumps and you are using
pickle.load instead of pickle.loads.

Sample loading to and from a string which you can tuck away in a file.

>>> import pickle
>>> test = {'a':1,'b':2}
>>> picklestr = pickle.dumps(test)
>>> test2 = pickle.loads(picklestr)
>>> test == test2
True
>>>


Sample using an open file.

>>> import pickle
>>> test = {'a':1,'b':2}
>>> pfile = open('pickletest','wb')
>>> pickle.dump(test,pfile)
>>> pfile.close()
>>> pfile = open('pickletest','rb')
>>> test2 = pickle.load(pfile)
>>> pfile.close()
>>> test == test2
True
>>>

...
Jay Graves


From kw at codebykevin.com  Sat May 10 11:31:37 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:31:37 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.896.1210396853.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <4825BFD9.7020600@codebykevin.com>

Kenneth McDonald wrote:
> Any guesses as to how many people are still using Tkinter? And can 
> anyone direct me to good, current docs for Tkinter?
> 
> Thanks,
> Ken

I develop Tk applications commercially on Mac OS X, using Tcl and 
Python. Here's a screenshot of my Python app:

http://www.codebykevin.com/phynchronicity-running.png

This app is built on Python 2.5.1 and Tk 8.5.0. Tk 8.5 has a huge number 
of improvements over older versions of Tk:

http://www.tkdocs.com/resources/backgrounder.html

Most importantly, Tk 8.5 has a themed widget set that allows for 
platform-native appearance on Windows and Mac (not emulated, but hooking 
into system API's). The themed widget set also adds a lot of new 
widgets, such as combobox, tree, and others. The older widget set is 
still available as well and they can be freely matched. Tk also has a 
lot of lightweight, script-level widget libraries that can also enhance 
the appearance and usability of your app.

My own app uses widgets from Tk's traditional set, the new Tile/ttk set, 
the Tabelist widget, and the BWidget widget library. It uses the 
following Python wrappers for these widgets:

http://tkinter.unpy.net/wiki/TileWrapper
http://tkinter.unpy.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/bwidget/

It also uses a few private wrappers/custom widgets.

In addition to the Python-specifc resources that others have provided, 
here's a new site that documents the latest-and-greatest Tk techniques, 
including Tile/ttk:

http://www.tkdocs.com/

The developer of this site is mainly interest in Tcl and Ruby, so 
examples of those are provided--I may provide some Python examples at 
some point. But there should be enough code snippets there for you to 
get started, especially if you already have some experience with 
Tk/Tkinter.

Tk still has some limitations, including a lack of cross-platform 
printing support (the canvas widget generates postscript, but that's not 
enough anymore) and an incomplete cross-platform drag-and-drop mechanism 
(works fine on Windows, it's buggy on *NIx because Xdnd is so 
inconsistent, and it was never developed for OS X). If you absolutely 
need these features, look at wxPython or PyQt. But coming to Python from 
a Tcl background, I'm very comfortable with Tk--it is lightweight, 
extremely flexible, and (as I hope you can see from my screenshot) it's 
possible to do sophisticated user interfaces with it. It fits my brain 
much better than wxPython, for instance. And the long effort by Tk's 
developers to modernize its appearance has finally paid off, I think.

Hope that helps,
Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From mail at timgolden.me.uk  Thu May  8 15:50:36 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 08 May 2008 20:50:36 +0100
Subject: How to gather information about the system hardware?
In-Reply-To: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>
References: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>
Message-ID: <4823598C.8010606@timgolden.me.uk>

Florencio Cano wrote:
> Hi,
> I'm looking for a method of gathering information about the system
> hardware and software installed using Python. I would like to do it in
> UNIX and in Windows. I think that it would be good in Windows to look
> in the registry and be able to parse and search it. Any pointer to
> information would be appreciated.

For Windows WMI is probably a good bet.

TJG


From nick at craig-wood.com  Sat May  3 14:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 13:30:03 -0500
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <slrng1paa5.eab.nick@irishsea.home.craig-wood.com>

Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>  I did the following calculation:  Generated a list of a million random 
>  numbers between 0 and 1, constructed a new list by subtracting the mean 
>  value from each number, and then calculated the mean again.
> 
>  The result should be 0, but of course it will differ from 0 slightly 
>  because of rounding errors.
> 
>  However, I noticed that the simple Python program below gives a result 
>  of ~ 10^-14, while an equivalent Mathematica program (also using double 
>  precision) gives a result of ~ 10^-17, i.e. three orders of magnitude 
>  more precise.
> 
>  Here's the program (pardon my style, I'm a newbie/occasional user):
> 
>  from random import random
> 
>  data = [random() for x in xrange(1000000)]
> 
>  mean = sum(data)/len(data)
>  print sum(x - mean for x in data)/len(data)
> 
>  A little research shows that Mathematica uses a "compensated summation" 
>  algorithm.  Indeed, using the algorithm described at
>  http://en.wikipedia.org/wiki/Kahan_summation_algorithm
>  gives us a result around ~ 10^-17:

I was taught in my numerical methods course (about 20 years ago now!)
that the way to do this sum with most accuracy is to sum from the
smallest magnitude to the largest magnitude.

Eg

  >>> from random import random
  >>> data = [random() for x in xrange(1000000)]
  >>> mean = sum(data)/len(data)
  >>> print sum(x - mean for x in data)/len(data)
  1.64152134108e-14
  >>> mean = sum(sorted(data))/len(data)
  >>> print sum(x - mean for x in data)/len(data)
  5.86725534824e-15
  >>>

It isn't as good as the compensated sum but it is easy!

>  I thought that it would be very nice if the built-in sum() function used 
>  this algorithm by default.  Has this been brought up before?  Would this 
>  have any disadvantages (apart from a slight performance impact, but 
>  Python is a high-level language anyway ...)?

sum() gets used for any numerical types not just floats...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jcd at sdf.lonestar.org  Tue May 20 11:50:17 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 20 May 2008 11:50:17 -0400
Subject: Help with character encodings
In-Reply-To: <4832EE29.5020700@islandtraining.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
	<4832EE29.5020700@islandtraining.com>
Message-ID: <1211298617.30679.9.camel@aalcdl07.lib.unc.edu>

On Tue, 2008-05-20 at 08:28 -0700, Gary Herron wrote:
> A_H wrote:
> > Help!
> >
> > I've scraped a PDF file for text and all the minus signs come back as
> > u'\xad'.
> >
> > Is there any easy way I can change them all to plain old ASCII '-' ???
> >
> > str.replace complained about a missing codec.
> >
> >
> >
> > Hints?
> >   
> 
> Encoding it into a 'latin1' encoded string seems to work:
> 
>   >>> print u'\xad'.encode('latin1')
>   -
> 
> 
Here's what I've found:

>>> x = u'\xad'
>>> x.replace('\xad','-')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xad in position 0:
ordinal not in range(128)
>>> x.replace(u'\xad','-')
u'-'

If you replace the *string* '\xad' in the first argument to replace with
the *unicode object* u'\xad', python won't complain anymore.  (Mind you,
you weren't using str.replace.  You were using unicode.replace.  Slight
difference, but important.)  If you do the replace on a plain string, it
doesn't have to convert anything, so you don't get a UnicodeDecodeError.

>>> x = x.encode('latin1')
>>> x
'\xad'
>>> # Note the lack of a u before the ' above.
>>> x.replace('\xad','-')
'-'
>>> 

Cheers,
Cliff




From agustin.villena at gmail.com  Thu May 22 11:28:13 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Thu, 22 May 2008 08:28:13 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
Message-ID: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>

On May 22, 5:19 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Agustin Villena a ?crit :
>
> >> And not that useful - why would one care about the function being
> >> defined in class X or Y when one have the exact file and line ?
>
> > I have 3 reasons:
>
> > 1) My developing time is expended running unit tests and browsing
> > tracebacks to find which is the real problem. Knowing the offender
> > class (instead of the method alone) makes me understand more quickly
> > which component of my software is failing.
>
> This is only true when there is an obvious, one-to-one, unambiguous
> relationship between the physical location of the error (file, line) and
> the class of the object the method has been called on. Which is not
> necessarily the case (inheritance, method decoration and monkeypatching
> comes to mind here...).
>
> Also, your above statement seems to imply that component==class, which
> is not the case in Python.
>
> > 2) There are some ocassions where I only have the traceback (e.g. when
> > analyzing an app's log) and no inmediate access to teh source code
>
> Ok. But the above still apply...
>
> > 3) And finally, for completeness: If a function is really a method, if
> > the traceback show only its name and not the class that defines it,
> > for me its a bug, because the method name has no sense out of its
> > class.
>
> I'm not sure you really grasp what "methods" are in Python. What you
> define (using the def statement) within a class is function, not a
> method. It only becomes a method when it's looked up on an instance or
> class object, and this 'method' is only a thin wrapper around the
> instance, class and function objects. And FWIW, you don't need to define
> the function within the class to make it a method:
>
> # bar.py
> def bar(obj):
>    print "function bar.bar called on obj %s" % obj
>
> # foo.py
>
> class Foo(object): pass
>
> # baaz.py
> from foo import Foo
> import bar
>
> Foo.baaz = bar.bar
>
> def guux(obj):
>    print "function baaz.guux called on obj %s" % obj
>
> # main.py
> from baaz import Foo
> f = Foo()
> f.bar()
>
> f.gnix = baae.guux.__get__(f, type(f))
> f.gnix()
>
> Not to say that your concerns are pointless, and that things cannot be
> improved somehow, but this is not that trivial, and there may be
> ambuiguities in some not so rare cases.

Well, the solution given in an early response is good enough for me.

I don't see things like you, because I'm accustomed to design my
software
though classes and see the code in an "object = software's functional
atom/component" way
I agree that python's dynamic nature make things complicated here, but
for me it its just
an implementation problem derived of the recent OOP support of python


From __peter__ at web.de  Wed May 28 04:11:19 2008
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 May 2008 10:11:19 +0200
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
Message-ID: <g1j436$6i8$02$1@news.t-online.com>

Gary Herron wrote:

> Alok Kumar wrote:
>> Dear All,
>>
>> I am using dictionary for filling my xpath parsed data.
>>
>> I wanted to use in the following manner.
>>
>> mydict[index] ["key1"] ["key2"]    #Can someone help me with right
>> declaration.
>>
>> So that I can fill my XML xpath parsed data
>>  
>> mydict[0] ["person"] ["setTime"] = "12:09:30"
>> mydict[0] ["person"] ["clrTime"] = "22:09:30"

[I didn't see the original post]

>>> from collections import defaultdict
>>> def make_inner():
...     return defaultdict(lambda: defaultdict(make_inner))
...
>>> mydict = make_inner()
>>> mydict[0]["person"]["setTime"] = "12:09:30"
>>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
>>> mydict
defaultdict(<function <lambda> at 0x2b7afd0025f0>, {0: defaultdict(<function
make_inner at 0x2b7afd002578>, {'person': defaultdict(<function <lambda> at
0x2b7afd002668>, {'setTime': '12:09:30', 'shoes': defaultdict(<function
make_inner at 0x2b7afd002578>, {'color': 'bright yellow'})})})})

If that looks too messy, try a subclass:

>>> class Dict(defaultdict):
...     def __init__(self):
...             defaultdict.__init__(self, Dict)
...     def __repr__(self):
...             return dict.__repr__(self)
...
>>> mydict = Dict()
>>> mydict[0]["person"]["setTime"] = "12:09:30"
>>> mydict
{0: {'person': {'setTime': '12:09:30'}}}
>>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
>>> mydict
{0: {'person': {'setTime': '12:09:30', 'shoes': {'color': 'bright
yellow'}}}}

Peter


From bblais at bryant.edu  Fri May 23 11:44:11 2008
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 23 May 2008 11:44:11 -0400
Subject: Python is slow
In-Reply-To: <8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
	<g1570j$n8g$1@aioe.org>
	<8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>
Message-ID: <3C750143-6BC0-4626-98A6-44FFA16FE142@bryant.edu>

On May 23, 2008, at May 23:10:11 AM, Grant Edwards wrote:

> On 2008-05-23, RPM1 <rpm9deleteme at earthlink.net> wrote:
>> Larry Bates wrote:
>>> If your Python program is slow, you have almost assuredly
>>> approached it with a wrong method or algorithm.
>>
>> I agree for most applications.  There are however times where
>> Python just isn't fast enough, and that's usually when people
>> write extension modules.
>
> Writing an extension modules is probably pretty far down the
> list.  What usually happens is people

I think that really depends on what you are doing.  For me, it is  
exactly as Larry said.  I prototype in Python, then profile to figure  
out the slowest piece(s), and write an extension module.  Personally,  
I use Cython which makes the transition pretty trivial.  It is this  
solution (cython, that is) that convinced me to use Python over Ruby,  
or some other language, when I was moving code from Matlab.  I  
haven't regretted it since.


				bb


-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais



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From mabbikeel at gmail.com  Tue May 27 17:52:35 2008
From: mabbikeel at gmail.com (mabbikeel)
Date: Tue, 27 May 2008 14:52:35 -0700 (PDT)
Subject: Books for learning how to write "big" programs
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
	<mailman.1661.1211921923.12834.python-list@python.org>
Message-ID: <3279f21e-a101-405a-ada9-ecb25bf9e067@x35g2000hsb.googlegroups.com>

On May 27, 9:58?pm, c james <cja... at callone.net> wrote:
> duli wrote:
> > Hi:
> > I would like recommendations for books (in any language, not
> > necessarily C++, C, python) which have walkthroughs for developing
> > a big software project ? So starting from inception, problem
> > definition, design, coding and final delivery on a single theme
> > or application.

I'm not sure, but perhaps Code Complete would be one to check out. I
found it a good read on general design and implementation details, and
has some bits on managing complexity.



From inhahe at gmail.com  Mon May 26 15:21:19 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:21:19 -0400
Subject: Question about wsgi.input
Message-ID: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>

I'm sorry if this is off-topic, i couldn't find a mailing list OR forum for 
WSGI (and #wsgi wasn't very helpful).

i played around with StringIO, and apparently if you write to a stringio the 
position gets set to the end of the write, so if you read from it again, 
without using seek, you won't read what comes next, you'll skip to the end 
of the write.  and if you write without seeking to the end first, you'll 
overwrite part of the string if the reading hasn't caught up.

WSGI says that wsgi.input should block if there's more data to be read from 
the socket, until that data is available. so when the server writes to the 
file object, what happens to the file position? if i were writing a WSGI 
app, i would just seek() to the last place my read ended at just to make 
sure.  but i'm making a server, so i need to know whether i should leave the 
position at the end of the write, when it blocks (or for that matter, if i'm 
writing while it's still reading), or at the end of the previous read?

thanks for any help.







From stefan_ml at behnel.de  Wed May 28 16:04:23 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 28 May 2008 22:04:23 +0200
Subject: BeautifulSoup: problems with parsing a website
In-Reply-To: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>
References: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>
Message-ID: <483DBAC7.1050900@behnel.de>

Marco Hornung wrote:
> Hy guys,

... and girls?


> I'm using the python-framework BeautifulSoup(BS) to parse some
> information out of a german soccer-website.

consider using lxml.

http://codespeak.net/lxml

    >>> from lxml import html


> I want to parse the article shown on the website.

    >>> tree = html.parse("http://www.bundesliga.de/de/liga/news/
                                    2007/index.php?f=94820.php")

> To do so I want to
> use the Tag " <div class="txt_fliesstext">" as a starting-point.

    >>> div = tree.xpath('//div[@class = "txt_fliesstext"]')


> When
> I have found the Tag I somehow want to get all following "br"-Tags

Following? Meaning: after the div?

    >>> br_list = diff.xpath("following-sibling::br")

Or within the div?

    >>> br_list = diff.xpath(".//br")


> until there is a new CSS-Class Style is coming up.

Ok, that's different.

    >>> for el in div.iter(): # or div.itersiblings():
    ...     if el.tag == "br":
    ...         print el.text # or whatever
    ...     elif el.tag == "span" or el.get("class"):
    ...         break

Hope it helps.

Stefan


From kyosohma at gmail.com  Fri May 23 13:21:47 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 10:21:47 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com>
Message-ID: <dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com>

On May 23, 12:02?pm, Gandalf <goldn... at gmail.com> wrote:
> On May 23, 6:25 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 23, 10:45 am, Gandalf <goldn... at gmail.com> wrote:
>
> > > How can i bind function that handle the mouse clicking ?window X event
> > > or clicking alt+F4
>
> > > thanks
>
> > You really need to learn to ask good questions. Unless people dive
> > into your previous posts, they won't know what Python GUI toolkit you
> > are using, which version of said toolkit, which Python or which OS.
>
> > Here's a good place to read about events in general:
>
> >http://wiki.wxpython.org/EventPropagation
>
> > If you use Google, you can look for the close event, which gives you
> > this:
>
> >http://www.wxpython.org/docs/api/wx.CloseEvent-class.html
>
> > So you'll want to bind your frame to EVT_CLOSE. You can disable the
> > "X" in your frame's window by using non-standard style parameters.
>
> > Mike
>
> OK you right. I use WX on windows XP.
> I didn't understood how to use this wx.CloseEvent function.
>
> i really struggle with my poor english to understand this language, so
> your help is crucial for my progress and i appreciate it
>
> Thanks

No problem. It just makes it much harder to help if we don't know what
you're doing. I forget to mention stuff when I post too.

Just in case you still don't get it, here's some generic code:

<code>

self.frame.Bind(wx.EVT_CLOSE, self.onClose)

def onClose(self, event):
    self.frame.Destroy()

</code>

Note that I called the frame's Destroy() method instead of its Close()
method. If you call Close() then the EVT_CLOSE event gets fired again
and you basically end up in a loop.

Mike


From jason.scheirer at gmail.com  Thu May 22 13:41:15 2008
From: jason.scheirer at gmail.com (Jason Scheirer)
Date: Thu, 22 May 2008 10:41:15 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <f16607c9-ebf4-422c-855a-2b96e04457fb@q24g2000prf.googlegroups.com>

On May 22, 9:14?am, cm_gui <cmg... at gmail.com> wrote:
> Python is slow. ? ?Almost all of the web applications written in
> Python are slow. ? Zope/Plone is slow, sloow, so very slooow. ?Even
> Google Apps is not faster. ? Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

This post is a troll written by someone who has already made up their
mind. I really don't recommend trying to argue here. I've written
plenty of fast, fast Python and there are countless Python processes
on servers out there that is not only fast but transparently so.


From byte8bits at gmail.com  Tue May 20 09:37:19 2008
From: byte8bits at gmail.com (brad)
Date: Tue, 20 May 2008 09:37:19 -0400
Subject: Using Python for programming algorithms
In-Reply-To: <482F71B0.3050808@ncf.ca>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca>
Message-ID: <g0uk74$7a4$1@solaris.cc.vt.edu>

> Vicent Giner wrote:

> The usual answer is that development time is more important than running time.

This depends. Run time is not important until you are asked to scale to 
millions or billions of users or computations or large data sets. I've 
seen this first hand. Getting results back the same day or sooner may be 
important. In cases such as this, I use C or C++... nothing else will 
do. Nothing else is as fast. Although I always keep a py version around 
for testing and for smaller tasks. Don't get me wrong, I love Python, 
but there are times when nothing, but pure, hard speed will do.


From deets at nospam.web.de  Fri May 16 12:08:55 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 18:08:55 +0200
Subject: writing python extensions in assembly
In-Reply-To: <5giXj.4881$Kk3.2633@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
	<695ni3F30u8tgU2@mid.uni-berlin.de>
	<5giXj.4881$Kk3.2633@bignews9.bellsouth.net>
Message-ID: <695pt5F30ah0iU1@mid.uni-berlin.de>

inhahe schrieb:
> I like to learn what I need, but I have done assembly before, I wrote a 
> terminal program in assembly for example, with ansi and avatar support.  I'm 
> just not fluent in much other than the language itself, per se.
> 
> Perhaps C would be as fast as my asm would, but C would not allow me to use 
> SIMD, which seems like it would improve my speed a lot, I think my goals are 
> pretty much what SIMD was made for.


That is not true. I've used the altivec-extensions myself on OSX and 
inside C.

Besides, the parts of your program that are really *worth* optimizing 
are astonishly few. Don't bother using assembler until you need to.

Diez


From gherron at islandtraining.com  Fri May 16 20:08:20 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 17:08:20 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
Message-ID: <482E21F4.1090809@islandtraining.com>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
>  
> How do I make it so that I now have:
>  
> starting with first element (a[0])
> new_arr[0] = 'r'
> new_arr[1] = 'g'
> new_arr[2] = 'b'
> new_arr[3] = 'a'
> new_arr[4] = 'r'
> .....
>  
> continuing "through" a[1] with the same new_arr
> new_arr[N] = 'r'
> new_arr[N+1] = 'g'
> ....
>  
> -M

Numpy can do this for you.  First, do you really mean the array to 
contain lists of one string each?  If so:

 >>> import numpy
 >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
 >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')  # Kind of a 
kludge here
 >>> b
array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',
       'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
       'b', 'b', 'a', 'a', 'a', 'a'],
      dtype='|S1')
 >>> b.shape=(2,4,4)
 >>> b
array([[['r', 'r', 'r', 'r'],
        ['g', 'g', 'g', 'g'],
        ['b', 'b', 'b', 'b'],
        ['a', 'a', 'a', 'a']],

       [['r', 'r', 'r', 'r'],
        ['g', 'g', 'g', 'g'],
        ['b', 'b', 'b', 'b'],
        ['a', 'a', 'a', 'a']]],
      dtype='|S1')
 >>> c = b.transpose((2,0,1))
 >>> c
array([[['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']]],
      dtype='|S1')
 >>> d=c.copy() # To make it contiguous
 >>> d.shape = (32,)
 >>> d
array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',
       'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
       'b', 'a', 'r', 'g', 'b', 'a'],
      dtype='|S1')

Done.  Cool no?

Gary Herron

>
>
>
>
>     ------------------------------------------------------------------------
>     From: marlin_rowley at hotmail.com
>     To: robert.kern at gmail.com; python-list at python.org
>     Subject: RE: numpy.frombuffer != unpack() ??
>     Date: Fri, 16 May 2008 17:31:30 -0500
>
>     Thank you!  That solved it!
>      
>     -M
>
>
>     ------------------------------------------------------------------------
>
>     > To: python-list at python.org
>     > From: robert.kern at gmail.com
>     > Subject: Re: numpy.frombuffer != unpack() ??
>     > Date: Fri, 16 May 2008 17:25:00 -0500
>     >
>     > Marlin Rowley wrote:
>     > > All:
>     > >
>     > > I'm getting different floating point values when I use numpy
>     vs. unpack().
>     > >
>     > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
>     > > buffer = unpack("!f", byte)
>     > >
>     > > frgba[0] != buffer[0]
>     > >
>     > > why? This is forcing me use the unpack() function since it's
>     giving me
>     > > the correct values. What am I doing wrong?
>     >
>     > Endianness, perhaps? '!' specifies big-endian data (an alias for
>     '>'). Most
>     > likely, you are on a little-endian platform. All of the dtypes
>     in numpy default
>     > to the native-endianness unless specified. If you want to read
>     big-endian data
>     > using numpy, do this:
>     >
>     > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
>     >
>     > If you have any more problems with numpy, please join us on the
>     numpy mailing
>     > list. When reporting problems, please try to provide a small but
>     complete
>     > snippet of self-contained code, the output that you got, and
>     explain the output
>     > that you expected to get. Thank you.
>     >
>     > http://www.scipy.org/Mailing_Lists
>     >
>     > --
>     > Robert Kern
>     >
>     > "I have come to believe that the whole world is an enigma, a
>     harmless enigma
>     > that is made terrible by our own mad attempt to interpret it as
>     though it had
>     > an underlying truth."
>     > -- Umberto Eco
>     >
>     > --
>     > http://mail.python.org/mailman/listinfo/python-list
>
>
>     ------------------------------------------------------------------------
>     E-mail for the greater good. Join the i?m Initiative from
>     Microsoft.
>     <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
>
>
>
> ------------------------------------------------------------------------
> E-mail for the greater good. Join the i?m Initiative from Microsoft. 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From bignose+hates-spam at benfinney.id.au  Sat May 24 21:46:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:46:00 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<mailman.1542.1211661983.12834.python-list@python.org>
Message-ID: <87abif9mw7.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> Yes! One of the biggest advantages to unit testing is that you never
> ever deliver the same bug to the client twice.

More specifically, this is a benefit of putting all unit tests into an
automated test suite, and running that test suite all the time during
development so it's immediately clear when any of them fails due to a
code change.

It's not enough to *have* the unit tests, nor is it enough to only run
them at certain times. They need to run after every change, so the
feedback is immediate and local to the change that was made.

(good sigmonster, have a cookie)

-- 
 \            "Program testing can be a very effective way to show the |
  `\        presence of bugs, but is hopelessly inadequate for showing |
_o__)                              their absence."  -- Edsger Dijkstra |
Ben Finney


From goodz158 at yahoo.com  Thu May  1 02:58:03 2008
From: goodz158 at yahoo.com (Good Z)
Date: Wed, 30 Apr 2008 23:58:03 -0700 (PDT)
Subject: Is vs Equality Operator
Message-ID: <706397.16040.qm@web35903.mail.mud.yahoo.com>

Hello, 
I am having problem in using is. Here is what i am doing.

x=''
if x is None or x is '':
        return 1

The above statement does not return value 1.

If i changed the above check to 
if x == None or x == '':
        return 1
Now it works fine.

Any idea. What is happening here. I am using python 2.4.4 on ubuntu.

Mike


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From tarun.kap at gmail.com  Thu May 22 15:56:23 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Thu, 22 May 2008 12:56:23 -0700 (PDT)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
Message-ID: <a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>

On May 22, 2:44 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> TkNeo wrote:
> > I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> > be upgraded. Can you guys tell me if this scenario is possible.
>
> > 1. Any machine that uses .py files that use libraries that require 2.4
> > will have 2.4 on it.
> > 2. rest of the machines will have 2.3
>
> > now there is a shared drive. lets say i write a new library called
> > testlib.py and put it on the shared drive .. when a script uses it
> > from a 2.4 based machine, it will generate a testlib.pyc and leave it
> > on the shared drive. going forward that .pyc is used until the
> > original lib is changed. now lets say a 2.3 based machine is trying to
> > use that lib. it will try to use that pyc file which was compiled by
> > py2.4. will it work or crash ?
>
> It should work, as long as the original .py file is still there.  Each Python
> version will check for a .pyc file *corresponding to that version* (e.g. Python
> 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't
> exist, overwriting any existing .pyc file in the process.
>
> If the original .py file is *not* there, it will most likely not work.  If you
> try to import a .pyc file with the wrong version number, you get something like
> this:
>
>  >>> import foo
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> ImportError: Bad magic number in foo.pyc
>
> I'm not sure what would happen if multiple Pythons try to write a .pyc file at
> the same time, though...
>
> --
> Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/

The original .py will always be there but you know what, multiple
python versions from different computers do access that one library at
the same time.

Anyone know a possible solution ?


From kyosohma at gmail.com  Mon May  5 16:54:59 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 5 May 2008 13:54:59 -0700 (PDT)
Subject: Browser + local Python-based web server vs. wxPython
References: <mailman.588.1209997391.12834.python-list@python.org>
Message-ID: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>

On May 5, 9:22?am, pyt... at bdurham.com wrote:
> I'm looking at rewriting some legacy VB applications and am pondering
> which of the following techniques to use:
>
> 1. Browser based GUI with local web server (Browser +
> wsgiref.simple_server) (I'm assuming that simple_server is class I want
> to build from for a local web server)
>
> -OR-
>
> 2. wxPython based GUI
>
> My thought is that a browser/local web server setup may be more portable
> to mobile environments than wxPython and may offer a way to scale a
> single user offline application to a multi-user online application using
> a remote vs. local web server. Some groups of users may feel more
> comfortable with a browser based interface as well.
>
> I'm looking for feedback from anyone that has pondered the same question
> as well as any pros/cons or tips from anyone that has chosen the
> browser/lcoal web server route.
>
> Thanks,
>
> Malcolm

wxPython is great for desktop applications on Linux, Windows and Mac.
However, there isn't much support for it on mobile platforms at the
moment. If you're thinking your application will be mostly for mobile
environments, then you'll probably want to look at Python web
frameworks, Jython or Silverlight + IronPython (if you want to use
Python on the web).

The most popular Python web frameworks seem to be TurboGears, Django,
Pylons, CherryPy and mod_python.

I know you can run TurboGears, Django and CherryPy locally as well as
with Apache, so they might garner more of your attention.

Mike


From bj_666 at gmx.net  Sat May 24 07:38:58 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 May 2008 11:38:58 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
	<4r9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <69qd2iF33dagrU6@mid.uni-berlin.de>

On Sat, 24 May 2008 13:13:08 +0200, Johannes Bauer wrote:

> George Sakkis schrieb:
> 
>>> However, this "assignment and comparison" is not working. What's the
>>> "Python way" of doing this kind of thing?
>> 
>> The most obvious and readable of course: use two statements, as one
>> should do regardless of the language, instead of resorting to error-
>> prone hacks.
> 
> As I said in the reply to Carl, this might be okay for if-clauses, but 
> is bothering me with while-loops.

Then try to write the ``while`` loop as ``for`` loop and move the
comparison into a generator function, or use the two argument variant of
`iter()`, or `itertools.takewhile()`.

Ciao,
	Marc 'BlackJack' Rintsch


From marco at sferacarta.com  Tue May  6 10:59:42 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 16:59:42 +0200
Subject: sed to python: replace Q
In-Reply-To: <4820714b$0$34544$742ec2ed@news.sonic.net>
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <Dn_Tj.33642$o06.31061@tornado.fastwebnet.it>

Raymond wrote:

> Aren't sed, awk, grep, and perl the reference implementations of search
> and replace?

I don't know about "reference implementations", but I daresay they are a 
mess w.r.t. usability.



From wolfgang.grafen at ericsson.com  Tue May 13 07:44:27 2008
From: wolfgang.grafen at ericsson.com (Wolfgang Grafen)
Date: Tue, 13 May 2008 13:44:27 +0200
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <g0buur$n69$1@news.al.sw.ericsson.se>

dannywebster at googlemail.com schrieb:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
> 
> so far:
> 
>>>> f=os.open("./get_hostnames").readlines
> 
> returns ['host1 host2 host3 ... hostN\n]'
> 
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
> 
>>>> f=str(f)
>>>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]
> 
> 
> Any help is highly appreciated
> 
untested:
f=" ".join(f)
f.split()

Best regards

Wolfgang


From chris.hulan at gmail.com  Thu May 22 17:45:17 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Thu, 22 May 2008 14:45:17 -0700 (PDT)
Subject: Using os.walk to return files in subdirectories
References: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
Message-ID: <dc2a802a-0164-4b77-8955-57a459606939@i76g2000hsf.googlegroups.com>

On May 22, 5:24 pm, dj <d.a.aberna... at gmail.com> wrote:
...snip...
>      for d in dir:
>         if end == d:
dir is the list of subdirs of the current dir, and the current dir
is NOT a subdir of itself so end == dir is never true

Are you trying to get a list per subdir?

cheers


From castironpi at gmail.com  Sat May 17 22:22:39 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 19:22:39 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<g0mcd2$2qk0$2@news.mtu.ru>
Message-ID: <91d4cf3b-e71f-4e73-90da-db0735f34035@c65g2000hsa.googlegroups.com>

On May 17, 5:35?am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:
> > Full day later, I think it, to emphasize state, would prioritize
> > context. ?The reason for the huge ramble was, believe it or not,
> > namespace conflict... as though any other states around here might nose
> > in. ?And thanks to 'inhahe' for coming back with the question. ?...Which
> > would explain next move to 'prioritize context'. Context is a high
> > priority for people.
>
> > I'm proposing to start on one on a computer. ?The first things a
> > computer 'knows' are the boot, keyboard, & mouse. ?Yet on another scale,
> > the first things it knows are BIOS, file system, and OS. ?On still
> > another, the only thing it knows are interruptions. ?Knowledge is
> > important to context. ?(The scales are ram on disk on, ram on disk off,
> > and ram off, which may tell of the currency they and their power are
> > bought with. ?Thence, we should be getting different values for lengths
> > of time.)
>
> > (Furthermore, we're all on different longitudes -and- latitudes.)
>
> > Context comes from motion, perception, and composite perception
> > (reperception e.a.o. memory). ?There is some reason to believe that
> > motion and sight are different senses, perhaps so with stationary sound
> > (gatcha) and mobile sound too. ?Do you go deaf of a tone after prolonged
> > duration? ?That makes computers valuable commodities*: they have a
> > symbolic interface, which no other unlive objects have. ?They have both
> > mouse and keyboard.
>
> > *I'm sure there is a precision to wants: what magnitude of what types of
> > action a person wants from a day and for a time-- what energy states
> > they go to and from (note phone on come to and come from.)
>
> > Therefore, context should originate in mouse and keyboard.
>
> > Humans have symbolic know-how: knowledge of how to convey intent
> > digitally, though it may be there is no interpolation of 'intent per
> > mouse-or-key', even though people are prone to empathize with faces.
> > However, if you start with a 'me' and a 'no', you can get pretty
> > logical.
>
> > Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> > rationally dimensional (?), though they do have magnitudes per mass and
> > volume. ?The contingent of 'rationally dimensional' is having or
> > beknowing/benouncing an orthonormal basis. ?Incidentally, '''orthography
> > of a language specifies the correct way of using a specific writing
> > system to write the language. .. Orthography is derived from Greek ?????
> > orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
>
> > Further incidentally, context and state may have more important in
> > common than priority and price: privacy and safety are involved ex
> > hypothesi. ?Incidentally = ...
>
> > It is not clear that the first (cheapest best) human-computer language
> > is a computer language, though if two were orthonormal in comparison to
> > life, Python's fine. ?Not my first.
>
> > In privacy concerns, it is not clear that duals aren't primitives to
> > humans. ?What's a brain primitive? ?Lol: what is a primitive brain?
>
> > On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> >> I'm not an expert in this but what does it mean to emphasize state? ?It
> >> seems the opposite of that would be a) functional programming, and b)
> >> passing parameters instead of using global or relatively local
> >> variables. And maybe c) coroutines (generators as implemented in
> >> Python), although perhaps coroutines could be said to emphasize state
> >> inasmuch as they go out of their way to capture, objectify and reuse it
> >> (Stackless' microthreads, even moreso). ?And Python seems to be
> >> well-noted for implementing some functional programming methodology,
> >> and as for passing parameters it's just as object-oriented as the rest
> >> of them.
>
> >> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> >> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> >> > true?- Hide quoted text -
>
> >> - Show quoted text -
>
> Castironpi,
>
> I love you! You remind me of all the kittens and puuppies I had when I
> was a child.
>
> I #define this. Hope your database could give us something funny again.
>
> -- Ivan- Hide quoted text -
>
> - Show quoted text -

I have to talk about crossing threats.  But talking about threads is
like talking, and people talk about food.  What are some threats to be
scared of?  What about threads to be thunder?


From anand.prabhakar.patil at gmail.com  Thu May 29 04:44:13 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 09:44:13 +0100
Subject: code of a function
In-Reply-To: <483E6B8D.6020307@islandtraining.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
	<483E6B8D.6020307@islandtraining.com>
Message-ID: <B63DBB03-1487-4FEB-A6C8-D8731415E924@gmail.com>


On May 29, 2008, at 9:38 AM, Gary Herron wrote:
> Dark Wind wrote:
>> Hi,
>>
>> Is there any command in Python which gives the code for a function  
>> like just typing the name of a function (say svd) in R returns its  
>> code.
>>
>> Thank you
>
> Nope.

If you're using IPython, you can do svd?? .



From java.oke at gmail.com  Thu May  8 17:39:19 2008
From: java.oke at gmail.com (j.oke)
Date: Thu, 8 May 2008 14:39:19 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <0c3c6e48-32cf-4fdd-883e-348f4436a309@y38g2000hsy.googlegroups.com>

xahlee at gmail.com ha scritto:

> [bli bla blo, blu blu bum bum bam bam bim bim bim...]

don't know Y, by your arty-phycial excerptions always seem chinese
me...

-JO


From cwitts at gmail.com  Thu May 15 08:30:57 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 15 May 2008 05:30:57 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
Message-ID: <96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>

On May 15, 2:27?pm, globalrev <skanem... at yahoo.se> wrote:
> i have a big collection of .txt files that i want to open and parse to
> extract information.
>
> is there a library for this or maybe even built in?

os.open to open the files and iterate through it and built in string
functions to parse it.


From gandalf at shopzeus.com  Mon May 19 09:28:36 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 19 May 2008 15:28:36 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
Message-ID: <48318084.5040208@shopzeus.com>


>> I'm trying to write a multi threaded TPC server. I have used xmlrpc
>>     
>
>  How exactly did you come to the conclusion that your server must be
> multi threaded ?
>   
I don't think that it is important. But if you are interested:

- yes, the server will probably be I/O bound, not CPU bound
- I'm have experience with thread programming, but not with twisted

>> - I have to send larger amounts of data, the overhead of converting to
>> XML and parsing XML back would be too much pain
>>     
>
>  - What's the expected amount of data you have to transfer ?
>   
I cannot predict. But I will be trasferring image files which would be 
silly to do with XML.
>  - What's the expected network bandwidth ?
>   
It cannot be determined in advance.
>  - What's the expected acceptable transfer time ?
>   
Not known.
>  - How many users are expected to be transfering data at the same time ?
>   
The server should be scaleable up to hundreds of users. (I'm just trying 
to answer your questions, if that helps to answer mine.)
>  Did you consider gzipping your XML (or YAML) packets ? Would the
> transfer time be acceptable in this case ?
>   
No. "Image binary data -> base64encode -> XML -> gzip" - looks very 
silly. It cannot be efficient. Do you have better ideas?
>> BTW I do not care about the clients - they must trust the server side.
>>     
>
>  Oh, he said he _doesn't care about the clients_ ! ;-)
>   
I meant *safety* here: clients are going to download program updates 
from the server. So if they do not trust the server then they should not 
use it. The server is different: it must be safe against external 
attacks. Maybe it was my bad English? Sorry for the misunderstanding.
>  In general I would avoid that. Try to better estimate the speed
> requirements, to see if you really need do to this.
>   
I cannot predict "acceptable speed" requirements, but I can tell that 
there will be some clients downloading 100MB report files from the 
server, so I presume that I will need a progress bar. I think that I 
need to develop my own protocol for this, and probably the underlying 
layer should use binary representation.
>> Before I start re-inventing the wheel:
>>
>> - Is there another (already existing) higher level framework that I can
>> try? It should be safe and fast, that is the only restriction.
>>     
>
>  There's "Twisted".
>  http://twistedmatrix.com/projects/core/documentation/howto/servers.html
>   
Yes, I tried twisted before and I did not like it. It forces me to 
things that I do not want to do. (I cannot tell what it was - it was two 
years ago.)
>> - Do you think that it is a good idea to use xdrlib? I haven't seen
>> projects using it directly. For me it is like the rotor module was - it
>>     
>
>  It's probably the best way to send binary stuff over the network.
> But, again, I would avoid doing so.
>   
It is NOT the best way. Just to tell one example: big endian / little 
endian integers. Definitely I need some encoding.

(But if you are right and this is the best way, why would you avoid?)

  L




From goldnery at gmail.com  Thu May 29 20:37:53 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 17:37:53 -0700 (PDT)
Subject: As I promised couple of day a go
Message-ID: <2b5359a8-1e3a-46ef-bf24-0162126cc201@26g2000hsk.googlegroups.com>

When we discuss a  global window events. and i wanted to generate
event when the user click on a key out of my application. I promised
that if will found how to do it i'l show you.

I found this article which explain very simply how to hook py width
pyHook lib
http://mindtrove.info/articles/monitoring-global-input-with-pyhook/

now the following code combine between wxpython and phHook. I know
this code probably looks not efficient and unorganized. I'm really new
width this stuff, but it works fine.

before you try it you better install the pyHook from the following
link
http://mindtrove.info/articles/monitoring-global-input-with-pyhook/
*note theirs an image url you would have to edit in order for it to be
work

#!/usr/bin/python

# menu1.py

import wx
import wx.html as html
import pythoncom, pyHook


class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, wx.DefaultPosition,
wx.Size(400, 400))
        self.SetBackgroundColour('#fef9d8')

        panel= wx.Panel(self, -1, style=wx.SIMPLE_BORDER, size=(400,
100));
        aaa= html.HtmlWindow(panel, -1, style=wx.SIMPLE_BORDER,
size=(250, 60))
        aaa.LoadPage('aa.html')
        cnrl=wx.TextCtrl(aaa, 11, '', (20, 20), (120, 20))
        wx.Button(aaa, 12, "Translate", (160, 19))
        self.Bind(wx.EVT_BUTTON, self.OnClick, id=12)
        quite = wx.BitmapButton(panel, 20, wx.Bitmap('py/x.gif'),(370,
0), (20, 20), style=wx.ALIGN_RIGHT )
        self.Bind(wx.EVT_BUTTON, self.Yehuda, id=20)
        self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
        self.SetFocus()
        font1= wx.Font(12, wx.NORMAL, wx.NORMAL, wx.BOLD)
        font2=wx.Font(10, wx.NORMAL, wx.NORMAL, wx.NORMAL)
        text1=wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
style=wx.ALIGN_CENTRE)
        text1.SetFont(font1)
        text2=wx.StaticText(panel, -1, "Peace, By, Good by", (30,
100), style=wx.ALIGN_CENTRE )
        text2.SetFont(font2)
        self.Show()


        self.Centre()

    def Yehuda(self, event):
        self.Hide()
    def OnKeyDown(self, event):
        keycode = event.GetKeyCode()
        if keycode == wx.WXK_ESCAPE:
            ret  = wx.MessageBox('Are you sure to quit?', 'Question',
		wx.YES_NO | wx.NO_DEFAULT, self)
            if ret == wx.YES:
                self.Close()
        event.Skip()
    def OnClick(self,event):
        text1.SetLabel(cnrl.GetValue())

    def OnPaint(self, event):
        dc = wx.PaintDC(frame)
        dc.DrawBitmap(frame.bitmap, 20, 20)



class MyTaskBarIcon(wx.TaskBarIcon):
    def __init__(self, frame):
        wx.TaskBarIcon.__init__(self)

        self.frame = frame

        self.SetIcon(wx.Icon('menu1.png', wx.BITMAP_TYPE_PNG))
        self.Bind(wx.EVT_MENU, self.OnTaskBarActivate, id=1)
        self.Bind(wx.EVT_MENU, self.OnTaskBarDeactivate, id=2)
        self.Bind(wx.EVT_MENU, self.OnTaskBarClose, id=3)
        #self.frame.Bind(wx.EVT_CLOSE, self.OnClose)

    def CreatePopupMenu(self):
        menu = wx.Menu()
        menu.Append(1, 'Show')
        menu.Append(2, 'Hide')
        menu.Append(3, 'Close')
        return menu

    def OnTaskBarClose(self, event):
        self.frame.Close()

    def OnTaskBarActivate(self, event):
        if not self.frame.IsShown():
            self.frame.Show()

    def OnTaskBarDeactivate(self, event):
        if self.frame.IsShown():
            self.frame.Hide()

def OnKeyboardEvent(event):
        global x, frame, frame2
        if event.KeyID ==
162:
            if x==1:
               frame.Close()
               frame2= MyFrame(None, -1,  'frame')
               x=0
            else:
               frame2.Close()
               frame= MyFrame(None, -1,  'frame2')
               x=1

x=1
app = wx.App()
frame = MyFrame(None, -1,  'Babylon')
frame.tskic = MyTaskBarIcon(frame)
frame.Show(True)
app.SetTopWindow(frame)
hm = pyHook.HookManager()
hm.KeyDown = OnKeyboardEvent
hm.HookKeyboard()
pythoncom.PumpMessages()
app.MainLoop()





From george.sakkis at gmail.com  Sat May 31 10:54:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 31 May 2008 07:54:56 -0700 (PDT)
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<m2fxryc2db.fsf@googlemail.com>
Message-ID: <7a41e745-956b-4582-bd61-eac699f1d892@34g2000hsf.googlegroups.com>

On May 31, 4:19?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Cameron <cameronla... at gmail.com> writes:
> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
> > Graham article</a> and he builds an accumuator generator function in
> > the appendix. His looks like this:
>
> > <pre>
> > def foo(n):
> > ? s = [n]
> > ? def bar(i):
> > ? ? s[0] += i
> > ? ? return s[0]
> > ? return bar
> > </pre>
>
> > Why does that work, but not this:
>
> > <pre>
> > def foo(n):
> > ? s = n
> > ? def bar(i):
> > ? ? s += i
> > ? ? return s
> > ? return bar
> > </pre>
>
> Others have explained why, but this looks like "pythonized LISP" to
> me. ?I would rather use a generator function:
>
> def foo(n):
> ? ? while True:
> ? ? ? ? n += yield n
>
> Although the problem is that you can't send it values the first time
> round!
>
> >>> bar = foo('s')
> >>> bar.next()
> 's'
> >>> bar.send('p')
> 'sp'
> >>> bar.send('am')
>
> 'spam'
>
> But:
>
> >>> bar = foo(3)
> >>> bar.send(2)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> TypeError: can't send non-None value to a just-started generator

I find the "pythonized LISP" solution more understandable, even
without the initial next() requirement. YMMV

George


From http  Thu May 29 20:17:58 2008
From: http (Paul Rubin)
Date: 29 May 2008 17:17:58 -0700
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
Message-ID: <7xlk1sbq6h.fsf@ruckus.brouhaha.com>

Kris Kennaway <kris at FreeBSD.org> writes:
> I want to make use of UNIX credential passing on a local domain socket
> to verify the identity of a user connecting to a privileged
> service. However it looks like the socket module doesn't implement
> sendmsg/recvmsg wrappers, and I can't find another module that does
> this either.  Is there something I have missed?

There is a patch for it attached to an RFE in the python bug tracker,
I forget which one.  Try searching for sendmsg or ancillary messages
or SCM_RIGHTS in the tracker.


From wuwei23 at gmail.com  Thu May 29 19:20:49 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 16:20:49 -0700 (PDT)
Subject: code of a function
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com> 
	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org> 
	<RuG%j.37511$3j.21433@trnddc05>
Message-ID: <873d04c4-c902-4ed5-8c57-8af8c037f094@c19g2000prf.googlegroups.com>

On May 30, 8:54 am, Alan Isaac <ais... at american.edu> wrote:
> Anand Patil wrote:
> > If you're using IPython, you can do svd?? .
>
> http://www.scipy.org/doc/numpy_api_docs/numpy.linalg.linalg.html
>
> hth,
> Alan Isaac

That wasn't a question :) In IPython, '<entity>?' is roughly
equivalent to 'help(<entity>)', whereas '<entity>??' displays the
code, if possible:

IPython 0.8.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints
more.

In [1]: from functools import wraps

In [2]: wraps??
Type:           function
Base Class:     <type 'function'>
String Form:    <function wraps at 0x00CF31B0>
Namespace:      Interactive
File:           c:\python25\lib\functools.py
Definition:     wraps(wrapped, assigned=('__module__', '__name__',
'__doc__'), updated=('__dict__',))
Source:
def wraps(wrapped,
          assigned = WRAPPER_ASSIGNMENTS,
          updated = WRAPPER_UPDATES):
    """Decorator factory to apply update_wrapper() to a wrapper
function

       Returns a decorator that invokes update_wrapper() with the
decorated
       function as the wrapper argument and the arguments to wraps()
as the
       remaining arguments. Default arguments are as for
update_wrapper().
       This is a convenience function to simplify applying partial()
to
       update_wrapper().
    """
    return partial(update_wrapper, wrapped=wrapped,
                   assigned=assigned, updated=updated)

Which is very handy, like most of IPython.


From tjreedy at udel.edu  Sun May 11 16:14:29 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 16:14:29 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
Message-ID: <g07k34$339$1@ger.gmane.org>


"XLiIV" <Tymoteusz.Jankowski at gmail.com> wrote in message 
news:41078222-aec0-4e8b-8a1f-945cdf814498 at m73g2000hsh.googlegroups.com...
On May 11, 4:19 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

|The range() function returns a list and list is a sequence, isn't?

yes, for loops iterate thru any iterable 





From skanemupp at yahoo.se  Fri May  2 13:03:47 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 10:03:47 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
Message-ID: <8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>

print pygame.K_a displays 97 btw. what does that mean? i though it
would return true or false or 0 or 1.


From deets at nospam.web.de  Fri May 30 12:03:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 18:03:54 +0200
Subject: running on WinPC + comunication via USB
In-Reply-To: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>
References: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>
Message-ID: <6aamrhF16ulv6U1@mid.uni-berlin.de>

martin.nkm at googlemail.com schrieb:
> Hello, I have two questions.
> 1/ If I want to use Python and let my WinPC communicate via RS-232
> with external embedded computer I know there is a pyserial module,
> which I can use it. But what will happen if I want to replace RS-232
> by USB? I know I can have virtual COM port, but all the configuration
> parameters basically refer to RS-232 parameters - baudrate, bits,
> stopbits, parity. In case of USB that's a nonsense I think. Does
> anybody know?

Depending on the setup - no, it's the exact same thing. If e.g. the 
usb-device is a usb2serial converter or otherwise offers it's serveces 
as a serial-like device, it should work.

Additionally, there is libusb + a python-wrapping for that.

> 2/ Second is a basic question. Do I need also cygwin running on my
> Windows PC to get running Python scripts? Or is that Python
> interpreter (Win executable) self efficient? Thanks.

No cygwin needed. In fact you need to be careful *not* to mix python and 
cygwin-python. They can happily co-exist - but installing 
3rd-party-packages for one doesn't imply they are available for the other.

Diez


From castironpi at gmail.com  Wed May 14 11:31:14 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 08:31:14 -0700 (PDT)
Subject: pretty generic question
Message-ID: <3561bbab-6335-4074-9cd3-c3e3b05df195@34g2000hsf.googlegroups.com>

I have to talk about coding.  I'm thinking about traffic, freight,
scheduling, microcontrols, and acoustics.  I have pretty basics
understandings of the controls of computers.

My knowledge is a little contrary or rare; I specialize in information
interfaces, but they're not very expensive to copy, i.e. to look at
again.  I am capable of drawing marginal distinctions from the world
in to code.

My specialty does provide a resource for library design for further
information systems.


From python at bc90021.net  Sun May 11 13:10:14 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:10:14 GMT
Subject: File Creation Not Working In A Thread Class?
Message-ID: <WLFVj.32499$KJ1.2751@newsfe19.lga>

Hi All,

Thanks in advance for any and all help!

I have this code:

g = open(fileName, 'a')

where fileName is defined before the line it's used in.  It works fine 
when I use it outside a thread class.

When I put the same line in a thread class, it no longer works, and I get 
an error:

IOError: [Errno 2] no such file u'fileName'

Are threads not allowed to create files?


From d3vvnull at gmail.com  Thu May 22 23:13:54 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 22 May 2008 22:13:54 -0500
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <170543c70805222013x3fad3096q5bca73874ee6631e@mail.gmail.com>

In fact, the Pylons web framework is geared toward the MVC approach.
http://pylonshq.com/

On Thu, May 22, 2008 at 7:48 PM, George Maggessy <george.maggessy at gmail.com>
wrote:

> Hi Gurus,
>
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?
>
> Cheers,
> George
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From vivainio at gmail.com  Sun May 11 16:28:57 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 20:28:57 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <87iqxkwpo4.fsf@gmail.com>

bc90021 <python at bc90021.net> writes:


> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

Typically, when you report an error message, it helps to paste the
whole traceback. For example, it may be that you are seeing an error
from an old version of the file that has quotes around tempfileName,
or the error is coming from somewhere else.

But to answer your original question: no, there are no problems with
threading and files, and this is just simple human mistake somewhere.


From larry.bates at websafe.com`  Thu May 22 19:14:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 18:14:35 -0500
Subject: ctypes help
In-Reply-To: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
Message-ID: <JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>

gianluca wrote:
> Hy,
> I need help about use dll with ctypes. I've compiled my dll C library
> and I copied it in c:\windows\system32. When I load it with
> "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> python don't see the dll function. with dir(myDLL) I've only this:
> ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> '_name']
> 
> Could anybody help me
> 
> Thanks
> 
> Gianluca

Since it isn't python, dir can'd do much introspection on the object to produce 
the type of output you desire.  You have to know the functions (methods) that 
you want to call in your dll and call them.

-Larry Bates


From vlastimil.brom at gmail.com  Mon May  5 08:59:30 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Mon, 5 May 2008 14:59:30 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
Message-ID: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>

>
>
> Thanks for further comments David,

You are right, the choice of an appropriate data structure isn't easy; I
described the requirements in an earlier post:
http://mail.python.org/pipermail/python-list/2007-December/469506.html

Here is a slightly modified sample of the text source I currently use in my
present (ad hoc and quite dirty) code:

<KC 12><KNJ 13><VCC 0><VN rn_1_vers_1><FN 21rb><b>Wi den L...n
<VN rn_2_vers_1>m...k gein den P<u>ra</u>gern.</b>

<VNJ 1><VCC 1><VN 1>Wen dy h<u>er</u> czu T... vf dy vient
<VNJ 2><VCC 2><VN 2>w<u>er</u>n gesampt czu h<u>er</u>tin strit,
<VNJ 3><VN 3>dez m...s vs gein obint
<VNJ 4><VCC 3><VN 4>W... stunt s...t.
<VNJ 5><VCC 3><VN 5>Doch gar Sthir czu em kam,
<VNJ 6><VCC 5><VN 6>h...g W... sich ken em nom.
<VNJ 7><VCC 6><VN 7>Ez irgink ubil den L...:
<VNJ 8><VCC 7><VN 8>S... slug W...u<u>m</u> daz houbt ab vil gern.
<VNJ 9><VN 9>Den P<u>ra</u>g<u>er</u>n mochtin dy L...n<u>er</u> nit intken,
<VNJ 10><VCC 8><VN 10>si slugin si, das si plutis hin runnen.

<VNJ 00><VCC 9><VN _rn_1_vers_11><b>Wi de<u>m</u> Stracka geschach,
<VN rn_2_vers_11>du er do heim sin husf<u>ro</u>win sach.</b>

<VNJ 11><VCC 9><VN 11>Aus allin L...t<u>er</u>n ein<u>er</u> hin quom,
<VNJ 12><VCC 10><VN 12><FN 21va>der waz S...<u>ra</u>ka gna<u>n</u>t mit
de<u>m</u> nom.
<VNJ 13><VCC 11><VN 13>Em ein vetil den rat gab, ...

========================================
The corresponding data stored as a dict  look like the following dict (here
sorted, at least on the highest level):
(<u>, <i>, <b> ... are ignored here, these are used for the text formatting
for the gui and aren't retrieved any more)

{0: {u'KC': u'12', u'VCC': u'0', u'KNJ': u'13', u'FN': u'21rb', u'VN':
u'rn_1_vers_1'},
13: {u'KC': u'12', u'VCC': u'0', u'KNJ': u'13', u'VN': u'rn_2_vers_1',
u'FN': u'21rb'},
39: {u'KC': u'12', u'VCC': u'1', u'KNJ': u'13', u'VN': u'1', u'VNJ': u'1',
u'FN': u'21rb'},
71: {u'KC': u'12', u'VCC': u'2', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'2', u'VN': u'2'},
102: {u'KC': u'12', u'VCC': u'2', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'3', u'VN': u'3'},
126: {u'KC': u'12', u'VCC': u'3', u'KNJ': u'13', u'VN': u'4', u'VNJ': u'4',
u'FN': u'21rb'},
144: {u'KC': u'12', u'VCC': u'3', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'5', u'VN': u'5'},
171: {u'KC': u'12', u'VCC': u'5', u'KNJ': u'13', u'VN': u'6', u'VNJ': u'6',
u'FN': u'21rb'},
199: {u'KC': u'12', u'VCC': u'6', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'7', u'VN': u'7'},
224: {u'KC': u'12', u'VCC': u'7', u'KNJ': u'13', u'VN': u'8', u'VNJ': u'8',
u'FN': u'21rb'},
264: {u'KC': u'12', u'VCC': u'7', u'KNJ': u'13', u'VN': u'9', u'VNJ': u'9',
u'FN': u'21rb'},
307: {u'KC': u'12', u'VCC': u'8', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'10', u'VN': u'10'},
348: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'VN': u'_rn_1_vers_11',
u'VNJ': u'00', u'FN': u'21rb'},
373: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'00', u'VN': u'rn_2_vers_11'},
409: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'VN': u'11', u'VNJ':
u'11', u'FN': u'21rb'},
444: {u'KC': u'12', u'VCC': u'10', u'KNJ': u'13', u'VN': u'12', u'VNJ':
u'12', u'FN': u'21va'},
480: {u'KC': u'12', u'VCC': u'11', u'KNJ': u'13', u'FN': u'21va', u'VNJ':
u'13', u'VN': u'13'}}

The keys are indices of the places in text, where the
value of some tag/property ... changes; also the not changing values are copied
in the inner dicts, hence after determining the index of the first such
"boundary" preceeding the given text position (using bisect), the
complete parameters can be retrieved with a single dict lookup.
The other way seems much more complicated with this dict
structure. I.e. it should be possible to find the index/or all
indices/or the lowest index given some combinations of tag values - e.g.
with the input: u'FN': u'21va' >> 444 should  be found (as the lowest index
with this value)
for u'KC': u'12' AND u'VN': u'3' >> 102
(there are of course several other combinations to search for)
I couldn't find an effective way to lookup the specific values of the inner
dict (other than nested loops), probably using a set of tuples instead the
inner dict would allow the checks for intersection with the input data, but
this also seems quite expensive, as it requires the loop with checks over
the entire data ... the same would probably be true for multiple reversed
dicts keyed on the tags and containing the indices and the
corresponding values (but I actually haven't  tested the latter two
approaches).

The approach with sqlite I'm testing now simply contains columns for all
relevant "tags" plus a column for text index; this way I find it quite easy
to query the needed information in both directions (index >> tags; tag(s) >>
index/indices) with the db selects - even as a beginner with SQL.

The exact set of tags will be complete with the availability of all
texts, then the gui will be adapted to make the user selections available
(comboboxes). The searches are restricted
to the predefined "properties", they are not manually queried.
With the dynamic building of the db I just
tried, not to hardcode all the tags, but it would be later
possible to create the database tables and columns also in a
controlled "static" way.

Comparing the two versions I have, the dictionary approach really seems
quite a bit more complicated (the data as well as the functions for the
retrieval), than the sqlite3 version.

For this app I really actually don't need a persistent db, nor should it be
shared etc. The only used thing are the efficient lookup possibilities,
which seemed to do what I needed (simply using intersect selects). Are there
any ways how to implements this efficiently using the python builtin types?

Greetings,
   Vlasta
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From mensanator at aol.com  Wed May  7 16:31:06 2008
From: mensanator at aol.com (Mensanator)
Date: Wed, 7 May 2008 13:31:06 -0700 (PDT)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <021f52a9-4d18-4e0a-acdd-3a08cca4a4e5@z72g2000hsb.googlegroups.com>

On May 7, 3:13?pm, dmitrey <dmitrey.kros... at scipy.org> wrote:
> hi all,
> could you inform how to print binary number?
> I.e. something like
>
> print '%b' % my_number
>
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
>
> Thank you in advance, D

The gmpy works good.

>>> import gmpy
>>> print gmpy.digits(66,2).zfill(8)
01000010


From bellman at lysator.liu.se  Tue May 20 07:04:58 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 11:04:58 +0000 (UTC)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
Message-ID: <g0ub8q$f8n$1@news.lysator.liu.se>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> bearophileHUGS at lycos.com wrote:

>> The Example 2 builds a list, that is then thrown away. It's just a
>> waste of memory (and time).

> No, it doesn't. It uses append because it refers to itself in the
> if-expression. So the append(c) is needed - and thus the assignment
> possible but essentially useless.

Yes it does.  A list comprehension *always* creates a list.  In
this case it will be a list of None, since that is what list.append()
returns.  See this:

    >>> new=[]
    >>> s="This is a foolish use of list comprehensions"
    >>> [ new.append(c) for c in s if c not in new ]
    [None, None, None, None, None, None, None, None, None, None, None,
     None, None, None, None, None, None]

Yes, you do get a correct result in 'new', but you *also* create
a 17 long list with all elements set to None, that is immediately
thrown away.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"I refuse to have a battle of wits with an   !  bellman @ lysator.liu.se
 unarmed person."                            !  Make Love -- Nicht Wahr!


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:06:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:06:00 -0300
Subject: feedparser
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>
Message-ID: <op.ua3agakbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:30:44 -0300, Mike <42flicks at gmail.com> escribi?:

> I'm trying to use the feedparser module (http://www.feedparser.org/).
>
> Is it possible to use this without running the setup program?
>
> I don't see why not, seems like I'm missing something obvious.
>
> My directory structure is:
>
> myprogram.py
>     /feedparser
>         /feedparser.py
>
> I know I can install the module in the modules directory but would like  
> to
> avoid this for two reasons: I'm only using it for the one project so  
> would
> like to keep it seperate, and if I move to a shared host I may not be
> allowed to install additional modules (not sure if this is correct  
> though).

The easiest way would be to put the single module feedparser.py in the  
same directory as your program (I don't  completely get your reasons not  
to do that). OR put feedparser.py in some other directory that is already  
listed in sys.path. OR add the directory containing feedparser.py to  
sys.path, just at the beginning of your program.

> I've tried:
>
> import feedparser
>
> import feedparser.feedparser
>
> from feedparser import feedparser
>
> What am I doing wrong? :)

*IF* the directory 'feedparser' were a package (that is, if it contained a  
file __init__.py), then that last import statement would be valid. But I  
don't reccomend doing this; you're changing the module's environment.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:50:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:50:30 +0200
Subject: Python is slow
In-Reply-To: <g14rk0$4pf$1@solaris.cc.vt.edu>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
Message-ID: <4836772e$0$6097$426a74cc@news.free.fr>

Brad a ?crit :
> cm_gui wrote:
>> Python is slow.
> 
> It ain't C++, but it ain't a punch card either... somewhere in between. 
> I find it suitable for lots of stuff. I use C++ when performance really 
> matters tho... right tool for the job. Learn a good interpreted language 
> (Pyhton) and a good compiled language (C or C++) 

LordHaveMercy(tm). Could you guys please learn what you're talking about?

1/ being interpreted or compiled (for whatever definition of these
terms) is not a property of a language, but a property of an
implementation of a language.

2/ actually, all known Python implementations compile to byte-code.


> and you'll be just 
> fine. Until then, quit bitching.


From mail at timgolden.me.uk  Thu May 29 04:10:51 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:10:51 +0100
Subject: How to get all the variables in a python shell
In-Reply-To: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <483E650B.5060902@timgolden.me.uk>

lixinyi.23 at gmail.com wrote:
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
> 
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
> 
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

I stronly suggest you look at IPython [1]. To do what I think
you're describing, you'd need to hack or reimplement the interpreter.
And that's what they've done. ISTR that they even have a branch
which is dealing with parallel instances.

TJG

[1] http://ipython.scipy.org/moin/


From detlev at die-offenbachs.de  Sun May 18 09:48:33 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 18 May 2008 15:48:33 +0200
Subject: howto use pylint from Eric IDE?
References: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>
Message-ID: <g0pc3h$jgk$1@online.de>

dmitrey wrote:

> Hi all,
> 
> I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
> cannot find how to use pylint from Eric IDE GUI.
> Does anyone know?
> 
> Thank you in advance, D.

Project->Check->Run PyLint

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From miller.paul.w at gmail.com  Sun May 25 19:56:58 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 16:56:58 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<7xskw69cuc.fsf@ruckus.brouhaha.com>
Message-ID: <e1285efd-c0d5-486f-9cb0-71216bc5a1ef@e39g2000hsf.googlegroups.com>

On May 25, 7:35?pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> miller.pau... at gmail.com writes:

Thanks for your reply.  I guess I'll have to go source diving to truly
answer the question.

> "You can fix your Python program's performance problems by rewriting
> it in C" is not that convincing an answer to a concern that Python is
> slow ;-).

Wasn't meant to be.  But, it is a credit to Guido that, beyond the
pain inherent in coding in C, there's relatively little pain involved
in writing an extension module.


From pavlovevidence at gmail.com  Sun May  4 14:25:36 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 4 May 2008 11:25:36 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org> 
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com> 
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com> 
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
Message-ID: <da8e56f6-ea23-4df2-b17b-e6aff050e36c@r66g2000hsg.googlegroups.com>

On May 4, 2:13 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> However, what I said was not wholly untrue: code in C extensions is
> protected by the GIL and thus not interruptable, unless it either
> releases the GIL, or calls back into Python code (which is apparently
> what numpy scalars do).

And, because I know that someone will be nitpicky: yes, technically it
is interruptable at that point, but other Python threads trying to
execute the same piece of code are not allowed to run.


>     print 'final count:', count

This should be "int(count)".


Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:41:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:41:34 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <fvunsh$jjm$1@aioe.org>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
Message-ID: <48240e3e$0$30967$426a34cc@news.free.fr>

pistacchio a ?crit :
(snip)
> Technically speaking, it (Python) is not, for example, strongly 
> typed, 

You're confusing "strong" typing with static typing. Somewhat orthogonal 
issues.


From s0suk3 at gmail.com  Mon May  5 01:06:42 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 22:06:42 -0700 (PDT)
Subject: Truncate beginning of a file
Message-ID: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>

file.truncate(X) will truncate the file to at most X bytes (i.e. leave
the first X bytes of the file and throw away the rest). Is there a way
to throw away, say, the first X bytes of the file, and leave the rest?
(Without opening the same file for reading, reading and processing,
overwriting the file with the new processed data, etc.)


From Lie.1296 at gmail.com  Sun May 25 13:37:01 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:37:01 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
Message-ID: <37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>

On May 22, 12:28?pm, NC <n... at iname.com> wrote:
> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>
>
>
> > So, here's my delimna: I want to start a blog. ?Yeah, who doesn't.
> > Yet, I want learn the guts of it instead of just booting up some
> > wordwank or whatever.
>
> Here's a simple computation to consider... ?WordPress' codebase is
> approximately a megabyte of PHP code and megabyte of JavaScript code.
> Assuming that the average line of that code is 50 characters long, you
> are looking at 20,000 lines of code in PHP and as many in JavaScript.
> Based on the notion that the average developer out there writes 100
> lines a day, either you're in for a two-year project or your product
> is going to have seriously reduced functionality compared to something
> that's been freely available for years. ?What's your choice?

Nope, the core functionality of a blogging software could be
replicated in just a few lines of PHP codes, in the range of tens to
hundreds of lines. If you're creating your own blogging software, you
wouldn't seriously think you'd recreate all those things such as
pingbacks, commenting system, etc, etc, etc. No, you'd start with some
basic core functionalities: a few simple server side includes only.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:36:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:36:36 +0200
Subject: Bad form to access a *private variable* like _foo?
In-Reply-To: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
Message-ID: <48200a7f$0$23642$426a74cc@news.free.fr>

seberino at spawar.navy.mil a ?crit :
> Bad form to access a *private variable* like _foo?

In this case, this would be spelled "protected" - or even better 
"implementation". And the contract is: nothing prevent you to access 
implementation attributes, but then you're on your own if anything breaks.

> The reason I'm asking is that TurboGears/SQLObject mobel objects have
> an attribute called "_connection" that must be used to manually commit
> database stuff....
> 
> e.g.  MyObject._connection.commit()
> 
> It bugs me.  I don't know if it is a stylistic faux pas or not.
 >
> Is it?

The way you wrote it here, yes. If there's no official way to do the 
same operation and you have a real use case for it - in which case you 
may want to add a commit() method to SQLObject's model base class and 
submit the patch to SQLObject's maintainer. But I strongly suspect 
there's a better way to handle this case in SQLObject's API.




From basti.wiesner at gmx.net  Sat May 31 15:40:46 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 21:40:46 +0200
Subject: parse dates
References: <0f58a4f7-ba18-4f83-9291-12bc844a37a0@p25g2000hsf.googlegroups.com>
Message-ID: <g1s9k7$9iu$01$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ brechmos <brechmos at gmail.com> ]

> Hi,
> 
> I have been using PHP the last while and in particular strtotime.
> What I want to replicate is finding the second or fourth Monday of the
> next month.  In PHP with strtotime it is easy (strtotime("second
> Monday", strtotime("next month"), but I can't find an easy way to do
> it in Python.  I have seen DateUtil, but it seems to be able to do
> only the simpler parsing (could be wrong).
> 
> Any other ideas?

If parsing is not required, dateutil is just fine:

from datetime import datetime
from dateutil import relativedelta

# second monday
datetime.now() + relativedelta.relativedelta(day=1, weekday=relativedelta.MO(+2))

# next month
datetime.now() + relativedelta.relativedelta(months=+1)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkhBqcMACgkQn3IEGILecb7FXgCgg1X7vrP/uzTaPa5W3e2WsDFV
e5kAnizMQUDLfz07Z/d1hVehlCmoJuKl
=yi9t
-----END PGP SIGNATURE-----


From inhahe at gmail.com  Fri May 16 11:21:39 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 11:21:39 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
Message-ID: <wChXj.4859$Kk3.3020@bignews9.bellsouth.net>

You could be right, but here are my reasons.

I need to make something that's very CPU-intensive and as fast as possible. 
The faster, the better, and if it's not fast enough it won't even work.

They say that the C++ optimizer can usually optimize better than a person 
coding in assembler by hand can, but I just can't believe that, at least for 
me, because when I code in assembler, I feel like I can see the best way to 
do it and I just can't imagine AI would even be smart enough to do it that 
way...

For portability, I'd simply write different asm routines for different 
systems.  How wide a variety of systems I'd support I don't know.  As a bare 
minimum, 32-bit x86, 64-bit x86, and one or more of their available forms of 
SIMD.






"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:mailman.1229.1210949533.12834.python-list at python.org...
> On Fri, 16 May 2008 10:13:04 -0400
> "inhahe" <inhahe at gmail.com> wrote:
>> Can anyone give me pointers/instructions/a template for writing a Python
>> extension in assembly (or better, HLA)?
>
> I am trying to imagine the requirements document for your project.
>
> - Must be error prone and hard to debug
> - Must take an order of magnitude longer to write
> - Must be unportable to other systems
>
> Really, why don't you write your etension in C?  Do you really think
> you will improve your code by writing it in assembler?  Even embedding
> assembler in C code make it unportable and I find it hard to imagine
> anything that you want to do in a Python context that can't be done at
> least as well in C if not pure Python.
>
> Just curious is all.
>
> -- 
> D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
> http://www.druid.net/darcy/                |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner. 




From mnikhil at gmail.com  Wed May 21 20:37:49 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 22 May 2008 06:07:49 +0530
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>
Message-ID: <4834C05D.6020608@gmail.com>

bukzor wrote:
> On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
>> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>>
>>> what are the simple ways?
>>> I could think of os.open(), os.exec(touch file)
>>> are there any simpler methods?
>> Just use os.path.exists to check for file existence and open() as
>> replacement for touch.
>>
>>>>> import os
>>>>> if not os.path.exists('file'):
>> ...     open('file', 'w').close()
>> ...
>>
>>
>>
>> --- Giampaolohttp://code.google.com/p/pyftpdlib/
> 
> As simple as it gets is a single builtin function call:
> 
> open("somefile.txt", "a")
> 
> Leave out the ,"a" if you don't mind blanking a pre-existing file.
Thanks :-)

That reminds me to check if I could quickly nullify a file if it exists

if os.path.exists('file'):
	open('file', 'w').close()

Right?


From yves at zioup.com  Fri May 23 01:07:57 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 05:07:57 GMT
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
Message-ID: <NisZj.288476$pM4.73650@pd7urf1no>

Peter Otten <__peter__ at web.de> wrote:

> > A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with
> > list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip"
> > to do so?

> >>> items = [None] * 6
> >>> items[::2] = 1,2,3
> >>> items[1::2] = 4,5,6
> >>> items
> [1, 4, 2, 5, 3, 6]

My problem with this solution is that you depend on knowing how many
elements you have in each list ahead of time. Assuming that both list
are of the same length, then, I find the following more elegant:

list1=[1,2,3]
list2=[4,5,6]

reduce(lambda x, y: x+y, zip(list1, list2))

of course, zip creates tuples, so you end up with a tuple, therefore if
you need for your solution to be a list:
list(reduce(lambda x, y: x+y, zip(list1, list2)))
of
reduce(lambda x, y: x+y, list(zip(list1, list2)) )


Yves.
http://www.SollerS.ca



From kyosohma at gmail.com  Fri May 23 12:25:28 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 09:25:28 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
Message-ID: <5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com>

On May 23, 10:45?am, Gandalf <goldn... at gmail.com> wrote:
> How can i bind function that handle the mouse clicking ?window X event
> or clicking alt+F4
>
> thanks

You really need to learn to ask good questions. Unless people dive
into your previous posts, they won't know what Python GUI toolkit you
are using, which version of said toolkit, which Python or which OS.

Here's a good place to read about events in general:

http://wiki.wxpython.org/EventPropagation

If you use Google, you can look for the close event, which gives you
this:

http://www.wxpython.org/docs/api/wx.CloseEvent-class.html

So you'll want to bind your frame to EVT_CLOSE. You can disable the
"X" in your frame's window by using non-standard style parameters.

Mike


From rocky at panix.com  Wed May 21 11:39:01 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 21 May 2008 11:39:01 -0400
Subject: Possibly pydb 1.23 release around May 30
Message-ID: <wihskwb8y5m.fsf@panix5.panix.com>

A release of pydb (1.23) is currently scheduled for around May
30th. If you can and want to help make sure the release is okay, you can try out what is currently in CVS: 
   http://sourceforge.net/cvs/?group_id=61395

I've put an interim tar at http://bashdb.sf.net/pydb-1.23cvs.tar.gz

Changes in the upgoming release:

* Show parameters on call

* Some doc fixes.

* add ipython and python commands to go into an ipython or a python shell

* add "save" command to save the current breakpoints and/or 
  most settings to a file. (Suggested at a NYC Python group meeting)

* add set/show "deftrace" to allow stopping at a def (method creation)
  statement.

* pseudo gdb-like "annotate" set/show commands and option.

* Better emacs interactivion via above annotate

* bug when "info local" is run inside a "with" statement

  Fixes for last three items based patches by Alberto Griggio



From castironpi at gmail.com  Thu May 15 22:43:04 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:43:04 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
	<37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com> 
	<e717c110-7544-4028-89c4-b37efdd7d61d@a23g2000hsc.googlegroups.com>
Message-ID: <223ab3fc-cb1f-4765-8f27-50f1487c19a3@b1g2000hsg.googlegroups.com>

On May 15, 9:30?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:27?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > > > >> I'm cleaning up some old code, and want to see what orphan
> > > > >> functions might be sitting around.
>
> > > > >> Is there a static call tree analyzer for python?
>
> > > > > How about
> > > > >http://pycallgraph.slowchop.com/
>
> > > > > ...
> > > > > Jay Graves
> > > > > --
> > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > Have you checked to see if PyChecker or pylint can help you?
> > > > Apparently they can find unused variables at least, I don't know
> > > > whether they do functions or not.
>
> > > I think of dynamic programming and dynamic code, but voice. ?Does that
> > > mean sing about it?- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have to write a song. ?Somebody?- Hide quoted text -
>
> > - Show quoted text -
>
> Sorry for the frequent posts: I think I have to write a noise about
> train cars crossing rail, putting numbers on frequencies, and send
> code. ?Train whistles are pretty good too. ?I believe those are the
> ones that start to go on keystrokes. ?I'd try to compare differences
> between those and bowling pins. ?A couple others are coins clinking
> and poker chips. ?Generally speaking, tapping metals and glass.- Hide quoted text -
>
> - Show quoted text -

I also have to apologize for my manners.  This had nothing to do with
'call tree tool', which I neglected to consider.  It sounds teriffic
but I think something about Python makes it unfeasible or inadvisable
to visualize them.  It's naturally possible it has something to do
with the fact that the screen's in two dimensions relative to time,
which incidentally some rel. dbs. could use in expressiveness, it's
just that it has to come on the dollar since 'is' is often relative
to, and comes with verbs.

In per Python, you'd have to be wanting to visualize that breadth of
information to be wanting to spiral call trees on to screen.


From wolfgang.lipp at gmail.com  Sat May 24 06:04:14 2008
From: wolfgang.lipp at gmail.com (_wolf)
Date: Sat, 24 May 2008 03:04:14 -0700 (PDT)
Subject: image scaling in cairo, python
Message-ID: <a6aa3014-1f46-43f4-bd08-1a8a4c3d4aad@x41g2000hsb.googlegroups.com>

[also posted to: cairo at cairographics.org]

hi all,

i've heard cairo has become the image scling library for firefox3. is
that true? wonderful, i want to do that in python. there's a python
interface for cairo, right? i've used it before to do simple vector
stuff. seems to work. however, i haven't been able to find relevant
pointers via google.

so do you have any pointers on how to resize a raster image with
python using cairo? i've been jumping through hoops for a while now,
and i believe it should be easier.

cheers and ~flow

ps. related (long) posts:

http://groups.google.com/group/pyglet-users/browse_frm/thread/44253ad01d809da5/cd051e6bced271e1#cd051e6bced271e1

http://groups.google.com/group/comp.lang.python/browse_frm/thread/5df65d99cff0d7bb#


From yves at zioup.com  Mon May 12 23:18:32 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:18:32 GMT
Subject: anonymous assignment
In-Reply-To: <mailman.975.1210588838.12834.python-list@python.org>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>
	<mailman.975.1210588838.12834.python-list@python.org>
Message-ID: <cM7Wj.264425$pM4.71972@pd7urf1no>

Gabriel Genellina wrote:
>> Uses Python 2.6! ;)
>>
> 
> No need of 2.6 - the above code works since Python 2.2 at least:
> 
> Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import time
>>>> t=time.localtime()
>>>> type(t)
> <type 'time.struct_time'>
>>>> t.tm_year
> 2008
> 
> (but struct_time objects were printed as regular tuples)
> 

And not well documented !

Nice one ! Thanks.


From iainking at gmail.com  Wed May 14 11:08:51 2008
From: iainking at gmail.com (Iain King)
Date: Wed, 14 May 2008 08:08:51 -0700 (PDT)
Subject: Rename field in Access DB
Message-ID: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>

I'm manipulating an MS Access db via ADODB with win32com.client.  I
want to rename a field within a table, but I don't know how to.  I
assume there is a line of SQL which will do it, but nothing I've tried
(from searching) has worked.
Basic code:

import win32com.client
connection = win32com.client.Dispatch(r'ADODB.Connection')
DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
connection.Open(DSN)
connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
doesn't work
connection.Close()

Anyone know how to get this to work?

Iain


From castironpi at gmail.com  Fri May 16 14:01:16 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 11:01:16 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com> 
	<YOSdndykxtsMLbDVnZ2dnUVZ8s_inZ2d@posted.plusnet>
Message-ID: <a0836e62-922a-4836-a002-4da8ae2d7c08@m3g2000hsc.googlegroups.com>

On May 16, 10:45?am, Ant <ant... at gmail.com> wrote:
> Hi Paul,
>
> > LineStart *really* wants to be parsed at the beginning of a line.
> > Your textline reads up to but not including the LineEnd. ?Try making
> > these changes.
>
> > 1. Change textline to:
>
> > ? ? ?textline = pp.Combine(
> > ? ? ? ? pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
> > \
> > ? ? ? ? pp.LineEnd().suppress()
>
> Ah - so restOfLine excludes the actual line ending does it?
>
> > 2. Change comb to:
>
> > ? ? comb = head + parser
>
> Yes - I'd got this originally. I added the garbage to try to fix the
> problem and forgot to take it back out! Thanks for the advice - it works
> ? fine now, and will provide a base for extending the list format.
>
> Thanks,
>
> Ant...

There is a possibility that spirals can come from doubles, which could
be non-trivially useful, in par. in the Java library.  I won't see a
cent.  Can anyone start a thread to spin letters, and see what the
team looks like?  I want to animate spinners.  It's across
dimensions.  (per something.)  Swipe a cross in a fluid.  I'm draw
crosses.  Animate cubes to draw crosses.  I.e. swipe them.



From lac at openend.se  Tue May 27 09:08:42 2008
From: lac at openend.se (Laura Creighton)
Date: Tue, 27 May 2008 15:08:42 +0200
Subject: looking for membership management software -- Open Source,
	written in Python 
In-Reply-To: Message from miller.paul.w@gmail.com of "Mon,
	26 May 2008 12:18:47 PDT."
	<014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>
References: <mailman.1613.1211812586.12834.python-list@python.org>
	<014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>
Message-ID: <200805271308.m4RD8gXP018239@theraft.openend.se>

In a message of Mon, 26 May 2008 12:18:47 PDT, miller.paul.w at gmail.com writes:
>On May 26, 10:36?am, Laura Creighton <l... at openend.se> wrote:
>> I'm looking for an application that handles the membership of an
>> organisation -- who's a member, who has paid fees, addressbook and
>> the odd added field.
>>
>> Anybody got one they recommend?
>>
>
>It sounds like you essentially need a specialized database and an app
>to query the database.  If this is a small organization (under 100
>people, say), then the simplest solution would probably be a simple
>spreadsheet.  Otherwise, maybe something like Organizers' Database
>(http://www.organizersdb.org/) would do the trick.

We're bigger than this, and are very much in the 'we are way too big to
be a spreadsheet any more' phase.

>I haven't actually used this software, but it looks like it's made to
>do exactly what you want to do.

Indeed, but being powered by Drupal makes it a PHP system, and
I don't think I can get our security guys to go for that.  And it
only runs on windows; they're not going to be happy about that either.

>Hope that helps!

Yes, it did.  Thank you very much,

Laura

>
>--
>http://mail.python.org/mailman/listinfo/python-list


From marko.srepfler at gmail.com  Fri May 23 04:40:26 2008
From: marko.srepfler at gmail.com (x40)
Date: Fri, 23 May 2008 01:40:26 -0700 (PDT)
Subject: Google Treasure solution in python - first time python user, help 
	whats wrong
Message-ID: <44de619e-14f3-49d2-b336-a14e5dca12cd@e39g2000hsf.googlegroups.com>

I try to learn python thru solving some interisting problem, found
google trasure hunt,
write first program ( but cant find whats wrong).

# Unzip the archive, then process the resulting files to obtain a
numeric result. You'll be taking the sum of lines from files matching
a certain description, and multiplying those sums together to obtain a
final result. Note that files have many different extensions, like
'.pdf' and '.js', but all are plain text files containing a small
number of lines of text.
#
#Sum of line 5 for all files with path or name containing abc and
ending in .js
#Sum of line 5 for all files with path or name containing HIJ and
ending in .js
#Hint: If the requested line does not exist, do not increment the sum.
#
#Multiply all the above sums together and enter the product below.
#(Note: Answer must be an exact, decimal representation of the
number.)

import fnmatch
import os

def zbrojipl(pattern):
    rootPath = ''
    sum1=0
    for root, dirs, files in os.walk(rootPath):
     for filename in files:
      path=os.path.join(root, filename)
      if fnmatch.fnmatch(path, pattern):
        #print path
        f=open(path)
        redovi=f.readlines()
        #print len(redovi),redovi
        if len(redovi)>=5:
            #print redovi[4] # index od 0 kao C
            sum1=sum1+int(redovi[4])
    return sum1

print zbrojipl('*[abc]*.js')*zbrojipl('*[HIJ]*.js')


From BrianVanderburg2 at aim.com  Thu May  8 07:31:17 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 08 May 2008 07:31:17 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
Message-ID: <4822E485.4040107@aim.com>

This is sort of related, but I'm wondering what is different between 
"#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
thing, since an absolute path is not specified, find 'python' from the 
PATH environment,  I don't really know.

Brian Vanderburg II


From ggpolo at gmail.com  Sat May 10 11:48:30 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 12:48:30 -0300
Subject: People still using Tkinter?
In-Reply-To: <4825C265.90106@codebykevin.com>
References: <mailman.896.1210396853.12834.python-list@python.org>
	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
	<4825C265.90106@codebykevin.com>
Message-ID: <ac2200130805100848u781771e5u9249bb4e8254cbad@mail.gmail.com>

2008/5/10 Kevin Walzer <kw at codebykevin.com>:
> Guilherme Polo wrote:
>>
>> 2008/5/10 Zentrader <zentraders at gmail.com>:
>>>
>>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>>> extension for additional widgets, and TkTable and/or TableListWrapper.
>>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
>>
>> There is also Tile, or Ttk since Tk 8.5, if you are interested in
>> extensions too.
>> Apparently there are three Tile wrappers now, two are incomplete
>> (sorry for saying that):
>>
>> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
>> of ttk styling, maybe other things and it is not only a ttk wrapper
>> (there are other things besides it)
>> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
>> Treeview, big part of ttk styling and maybe something else.
>>
>> And there is also one I'm doing, that I expect to be complete:
>>
>> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
>>
>> Documentation and samples are still lacking, but I'm working on them.
>> And I haven't tested it under Windows, so I invite you all to test it.
>>
>> Regards,
>>
> I'm the maintainer of Tile.py. It may well be incomplete, as it was first
> developed by Martin Franklin a couple of years ago and I've been modifying
> it as my own needs require.
>
> So you're doing your own implementation of ttk in Tkinter as a Google Summer
> of Code Project? Wonderful! Are you planning on submitting it for including
> in Tkinter's core, as I did?

Thanks ;)
And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

> If yours proves to be the better implementation
> I'll gladly withdraw mine, as I'm not sure I have time to overhaul it
> extensively.
>
> I'll follow your progress with interest!

Thanks for support it, and sorry for saying yours was incomplete.
I wasn't trying to sell my version by doing that, was just trying to
say there were some point on doing another wrapper. I also noticed
that there is some problem in getting Martin Franklin to fill the
contributors agreement, that was the second point on doing this
wrapper.

>
> --Kevin
>
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com
>

Regards,


-- 
-- Guilherme H. Polo Goncalves


From mccredie at gmail.com  Fri May  2 13:21:03 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 2 May 2008 10:21:03 -0700 (PDT)
Subject: Preventing 'bad' filenames from raising errors in os.path
References: <mailman.465.1209746433.12834.python-list@python.org>
Message-ID: <31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>

On May 2, 9:40 am, pyt... at bdurham.com wrote:
> Bad file names, i.e. filenames the OS considers illegal, will cause
> functions in the os.path module to raise an error.
>
> Example:
>
> import os.path
> print os.path.getsize( 'c:/pytest/*.py' )
>
> On Windows XP using Python 2.5.2 I get the following traceback:
>
> Traceback (most recent call last):
>   File "<string>", line 74, in run_nodebug
>   File "<Module1>", line 3, in <module>
>   File "C:\Python\lib\ntpath.py", line 228, in getsize
>     return os.stat(filename).st_size
> WindowsError: [Error 123] The filename, directory name, or volume label
> syntax is incorrect: 'c:/pytest/*.py'
>
> Since there are many places a user can enter a path name (interactively,
> via config files, etc) in most applications, is there an os sensitive
> function that can be used to detect bad file names?
>
> As a matter of best practice, how do you wrap your use of file and path
> names to prevent unexpected failures? (There has to be a better
> alternative than try/except blocks around each use of an os.path
> function in one's code?)
>
> Thanks,
> Malcolm

What do you find troubling about try/except?

Compare:

import os.path

path = raw_input("enter a path:")
if isvalidpath(path): # this is a made up name
    print os.path.getsize(path)
else:
    # Do something else

To:

import os.path

path = raw_input("enter a path:")
try:
    print os.path.getsize(path)
except WindowsError:
    # Do something else

Now, I can understand if you don't like the "WindowsError" as that is
obviously platform specific. The try/except pattern however is the way
errors are handled in python and the best and most appropriate way to
deal with it. The above example just shows that at the very least
there isn't a significant difference in code size between the two
methods.

I don't know what the equivalent error is called in *nix but assume it
is PosixError (it isn't), then it would just be written this way:

import os.path

path = raw_input("enter a path:")
try:
    print os.path.getsize(path)
except (WindowsError, PosixError):
    # Do something else


You don't _always_ need to wrap os.path functions with try/except. You
only need to wrap where there is reason to expect that the input might
be prone to error. In those cases the alternative is what? wrapping it
in a if/else instead? How is that better?

Matt


From lowell at allemansonline.com  Wed May 28 16:53:56 2008
From: lowell at allemansonline.com (Lowell Alleman)
Date: Wed, 28 May 2008 16:53:56 -0400
Subject: Custom log handler and logging.config.fileConfig()
Message-ID: <839ec5810805281353w637e3e9yadf1f582f6d8c780@mail.gmail.com>

Here is the situation:  I wrote my own log handler class (derived from
logging.Handler) and I want to be able to use it from a logging config
file, that is, a config file loaded with the
logging.config.fileConfig() function.

Let say my logging class is called "MyLogHandler" and it's in a module
called "mylogmodule", I want to be able to make an entry something
like this in my logging config file:

   [handler_hand02]
   class=mylogmodule.MyLogHandler
   level=DEBUG
   formatter=form02
   args=('python.log', 10, True)

I did some digging in the code and documentation, and it doesn't
appear that this question of writing and accessing your own log
handlers is addressed.  As per the logging/config.py code, it looks
like the actual file handler classes are being grabbed using an "eval"
from the "logging" module's namespace, like so:
   klass = eval(klass, vars(logging))

So this basically means that I have to mess with the "logging"
module's namespace if I want this to work, right?  So I've come up
with a couple of options, but I'm trying to figure out what approach
is best:

Option 1:  Require the client (the user of my logging module), first
import my module and then copy it into the logging module's namespace,
before calling  fileConfig().  Something like this:

    import mylogmodule
    import logging
    logging.mylogmodule = mylogmodule

Option 2:  Have my module make a copy MyLogHandler class into the
logging (or logging.handlers) module, and then let the client use it
from their directly.  They client would still have to load my logging
class first (which isn't any different they what they would have to do
if they wanted to use the extended log handlers form the
logging.handlers module)

My module would include:
    import logging
    class MyLogHandler(logging.Handler):
        ...
    logging.MyLogHandler = MyLogHandler

The config file would simply have:
    class=MyLogHandler


Option 3:   Is there an easy (and non-evil) way for me to make my
module available as "logging.mylogmodule" directly?  I am using
setuptools, and it seems like what I've read about "namespaces", they
do something close to what I'm looking for, but I think that requires
that all of the "__init__.py"s involved be empty (or have some special
namespace declaration code).  The __init__.py for the logging module
is not at all empty, so I suppose that rules out this option?  Anyone
have some insights on this?


Thanks in advance,

- Lowell Alleman


From clabepa at gmail.com  Thu May 15 02:51:48 2008
From: clabepa at gmail.com (Claudio Driussi)
Date: Thu, 15 May 2008 08:51:48 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <mailman.1126.1210786968.12834.python-list@python.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
	<mailman.1126.1210786968.12834.python-list@python.org>
Message-ID: <482bdd7f$0$22075$6e1ede2f@read.cnntp.org>

Stef Mientki wrote:

>>> I've ran the first real world application through PPyGui-emulator,
>>> so I think it's time to release the first version.
>>> There's lot of room for improvements and a more beautiful layout.
>>>
>>> PPyGui-emulator is build upon wxPython and released under BSD license.
>>>
>>> For remarks, screen shots and downloads, see
>>> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html
>>
>> Wow! wonderful.
>> I was searching for it for debugging and easy development purposes,
>> screenshots sounds promising.
>>
>> but the api.py link is broken.
> Well the file is correctly at the server,
> and indeed it downloads as nonsense ???
> Is it not possible to just put a py-file on the server ??
> 
> Anyway, I've changed it into a zip file, and now everything works (at 
> least at my place)

Yea, tried, it works like a charm even into winpdb debugger.

Very nice, many thanks
Claudio



From alokkat at gmail.com  Sat May  3 12:26:43 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Sat, 3 May 2008 12:26:43 -0400
Subject: State machine Example in Python
Message-ID: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>

Can someone please redirect me for a state machine example or design pattern
used in Python.

Regards
Alok
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From marco at sferacarta.com  Tue May 13 06:20:12 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 12:20:12 +0200
Subject: array in class
In-Reply-To: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
References: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
Message-ID: <xXdWj.41723$o06.15763@tornado.fastwebnet.it>

alefajnie wrote:

> class B:
>   this_is_common_for_all_instances = []
> 
>   def __init__(self, v):
>     self.this_is_common_for_all_instances.append(v)
> 
> 
> ----------------
> now I can create some instances of B, but all of them have the same
> array, why

Because you didn't reassign the attribute 
'this_is_common_for_all_instances', but appended to it.

> and how create array in class - normal array, "private variable"

1) it's called a list, not an array
2) you do that in the __init__ method: self.blabla = []
3) still, it won't be a "private" attribute, just an instance attribute


From mensanator at aol.com  Sun May 18 19:17:55 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 16:17:55 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>

On May 18, 5:20?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Odd, I've been using Python since ver 2.2 and I've
NEVER needed a GUI. I do things like (looking at the
last 6 months of my Python directory):

- how to scrape movie receipt data from IMDB
  and insert them into an MS-Access database

- how to scrape .jpgs from a web page (simple
  file transfer, no display needed)

- how to do a Cartesian Product in SQLlite3

- how to creat a polynomial from a sequence of
  numbers using Newton's Forward Differences method

- how to calculate the date of Easter

- how to construct arbitrary length cycles in the
  Collatz Conjecture

- how to find the Ultimate Cycle (also in Collatz
  Conjecture)

- efficient cycle detection comparing Brent's and
  Sedgewick's cycle detection algorithms

- finding the cycles of 3n+C systems

- partioning W marbles into D ordered bins with
  the constraint that each bin contain a minimum of 1

- partioning W marbles into D ordered bins with
  the constraint that each bin contain a minimum of 1
  and that no bin exceeds M

- a Python Cartesian Product that in addition to
  Permutaions with Replacement, also gives the subsets
  Permutations without Replacement, Combinations with
  Replacement and Combinations without Replacement

- demonstrating the fallacy of Peter Scorer's "proof"
  of the Collatz Conjecture

- demonstrating the fallacy of Alan Tyte's "proof" of
  the Collatz Conjecture

- demonstrating the fallacy of Ken Conrow's "proof" of
  the Collatz Conjecture

- how to identify which members of the infinite solutions
  to a given Sequnce Vector of a 3n+C system are located
  on the trivial graph component

- developing a novel factoring algorithm based on the
  Collatz Conjecture

I see no need for GUI in any of these applications.




From dickinsm at gmail.com  Wed May 21 16:20:38 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Wed, 21 May 2008 13:20:38 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<ec9eg5-7lm.ln1@pluto.solar-empire.de>
Message-ID: <5f27111e-942c-48c1-81c1-fe1567e887bb@c58g2000hsc.googlegroups.com>

On May 21, 3:22?pm, Marc Christiansen <use... at solar-empire.de> wrote:
> On my system, it works:
>
> ?Python 2.5.2 (r252:60911, May 21 2008, 18:49:26)
> ?[GCC 4.1.2 (Gentoo 4.1.2 p1.0.2)] on linux2
> ?Type "help", "copyright", "credits" or "license" for more information.
> ?>>> a = 1e16 - 2.; a
> ?9999999999999998.0
> ?>>> a + 0.9999
> ?9999999999999998.0
>
> Marc

Thanks for all the replies! It's good to know that it's not just
me. :-)

After a bit (well, quite a lot) of Googling, it looks as though this
might be known problem with gcc on older Intel processors: those using
an x87-style FPU instead of SSE2 for floating-point.  This gcc
'bug' looks relevant:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323

Now that I've got confirmation I'll open a Python bug report:  it's
not clear how to fix this, or whether it's worth fixing, but it
seems like something that should be documented somewhere...

Thanks again, everyone!

Mark


From n00m at narod.ru  Thu May  1 05:21:22 2008
From: n00m at narod.ru (n00m)
Date: Thu, 1 May 2008 02:21:22 -0700 (PDT)
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
	<mailman.398.1209633049.12834.python-list@python.org>
Message-ID: <7292bae2-993e-41cc-8f0e-8d1339ecebdf@25g2000hsx.googlegroups.com>



Gabriel Genellina:
> En Thu, 01 May 2008 04:35:17 -0300, n00m <n00m at narod.ru> escribi?:
>
> > from random import randint
> >
> > s1 = ''
> > s2 = ''
> >
> > for i in xrange(1000):
> >     s1 += chr(randint(97,122))
> >     s2 += chr(randint(97,122))
> >
> > print s1[:25]
> > print s2[:25]
> >
> > import difflib
> >
> > s = difflib.SequenceMatcher(None, s1, s2)
> >
> > print s.find_longest_match(0, len(s1), 0, len(s2))
> >
> >
> >
> >>>> ============== RESTART ====================
> >>>>
> > yymgzldocfaafcborxbpqyade
> > urvwtnkwfmcduybjqmrleflqx
> > (0, 0, 0)
> >>>>
> >
> > I think it's line #314 in difflib "who's to blame" --
>
> Me too. Could you think of some alternative? Simply disabling that
> "popularity check" would slow down the algorithm, according to the
> comments.
>
> --
> Gabriel Genellina

No idea :)


From skanemupp at yahoo.se  Sat May  3 12:51:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 3 May 2008 09:51:06 -0700 (PDT)
Subject: pygame: rect moveto?
Message-ID: <7360a3b3-61b8-4cb9-b4d7-177c532bc880@b1g2000hsg.googlegroups.com>

http://www.pygame.org/docs/ref/rect.html#Rect.move

well i need to put my rect ina specific place and i donw know from
where i will move it so i need a function rect.moveTo(x,y).

how do i do that?


From daveparker at flamingthunder.com  Mon May 12 21:36:20 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 18:36:20 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
Message-ID: <1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>

On May 12, 7:20?pm, castiro... at gmail.com wrote:
>?Yes, I am trying to visualize something.

If it is related to making furniture comfortable for humans, have you
considered painting the furniture with thermochromic paint (
http://en.wikipedia.org/wiki/Thermochromism )?  It changes color in
response to temperature, which in part is determined by how hard a
body is pressed against it because close contact tends to trap heat.
An evenly distributed color might indicated evenly distributed
pressure.



From metawilm at gmail.com  Mon May  5 14:55:38 2008
From: metawilm at gmail.com (metawilm at gmail.com)
Date: Mon, 5 May 2008 11:55:38 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com>

On May 4, 1:11 pm, castiro... at gmail.com wrote:
> There is no such thing as a 'frame' per se in C; byte code is
> integral.  As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state.

Well, for implementing generators there are alternatives to using
frames + byte code. In CLPython generators are implemented with
closures. (Which does not help much when it comes to reimplementing
generators in C, alas.)

- Willem


From goldnery at gmail.com  Fri May 30 13:11:40 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 10:11:40 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
	<6aanqgF36mnldU1@mid.uni-berlin.de>
Message-ID: <2980f056-a68f-4d8e-9104-642ef5911fcf@k37g2000hsf.googlegroups.com>

Hi Diez, I can't see how it  matter which GUI-Toolkit i uses because I
can combine libraries.
I think all that matter is that i work with windows XP.

if you ever done something like that or you familiar with article
which can show me how to implement what I asked it would help me

Thank you very much


From jaywgraves at gmail.com  Fri May 16 15:22:43 2008
From: jaywgraves at gmail.com (jay graves)
Date: Fri, 16 May 2008 12:22:43 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
Message-ID: <9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>

On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
> i extract info from one file and put it into a dictionary.
> i want to save that dictionary for later use, how do i do that?
> might save a list of dictionaries or a list of classobjects too if
> there is any difference.

use the 'pickle' module.
http://docs.python.org/lib/module-pickle.html

...
Jay Graves


From unknown_hero007 at hotmail.com  Wed May  7 07:25:44 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Wed, 7 May 2008 04:25:44 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org>
Message-ID: <f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com>

Thank you, I think I can manage now. It's nice that you could spare
some time to help me in this, Tim. People like you make the world a
better place :)

I'll post my code here once I have time to write it, currently I'm
rather busy. That is merely for optimization suggestions and for
others who might need the same sort of code I did.


Thank you once again.


From hat at se-162.se.wtb.tue.nl  Tue May  6 09:23:35 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 15:23:35 +0200
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <slrng20mun.1cu.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, krumblebunk at gmail.com <krumblebunk at gmail.com> wrote:
> Hello gurus,

Hello fellow-guru,

> I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
> module), and when it returns the result, I am pulling it out as such:
>
> try:
>     sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
> except pg.InternalError:
>     print "Failed to execute SQL: %s" % sql
>     exit
>
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result

I am sure the above is very good. However, as I never program a data base, I
absolutely have no clue what data structure you assume here. A literal value in
Python syntax or so would be quite useful.

>     f=dict(foo)

f becomes a dict here. Not sure why you do this, as you stated above that you
already had a dict.

>     for k in f.iteritems()

k becomes here all key/value pairs of f, ie it is a tuple
example:

f = {1:'a', 2:'b'}
for k in f.iteritems():
  print k

will print something like

(1, 'a')
(2, 'b')

A more useful statement could be

for k,v in f.iteritems():
   ...

here a multi-assignment is done (the tuple is broken and each part is assigned
to a seperate variable), k becomes the key-part, and v becomes the value-part

>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.

This will break in two ways. Firstly, k was a tuple, so you cannot compare it
with a string. Secondly, this is not the way to match partial strings.

The first problem can be solved with the multi-assignment, or by indexing on
the tuple (ie k[0] or k[1]).

For the second problem, have a look at the string methods:
http://docs.python.org/lib/string-methods.html#l2h-233

In this particular case, you can use
if k.startswith('Hostname'):
or
if k[:8] == 'Hostname': # Slice the first 8 chars of the string

For more powerful regular expressions, read the 're' module documentation.


>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.

f is a dict. That means indexing is on its keys. Unless you have the integer
key 3 in your dictionary, this will not work.

f = {3:'q'}
print f[3]  # prints 'q'

However, a dict has no order, so the '4th column' has no meaning.

On the other hand, if f is a list, like [10,20,30,40,50], then f[3] is 50,
because you can use integers to index in a list (indexing is just a simple form
of slicing).

> This breaks spectacularly -

Ah, segmentation fault?
(that would be spectacular at least).

It would also help if you tell us at what line it breaks and with what error.


> any ideas?

Without a explicit Python value of what comes out of the sql query, I can only
guess. As example, assume the following data:

f = { 1: ['Hostname', 'blabla', 'person', 'john'],
      2: ['MachineName', 'blabla', 'company', 'something']}

ie a dictionary of column number to rows.

Here you are only interested in the value part, and the code becomes.

for v in f.itervalues():
  if v[0].startswith('Hostname'):
     print v[3]




From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 15:39:32 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 14:39:32 -0500
Subject: Any other UI kits with text widget similar to that in Tk?
Message-ID: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>

I'm wondering if any of the other GUI kits have a text widget that is  
similar in power to the one in Tk. wxWindows, from what I can tell,  
doesn't offer nearly the options the Tk widget does. I'm less familiar  
with Qt. Any feedback would be most appreciated.

Thanks,
Ken



From gagsl-py2 at yahoo.com.ar  Sun May 18 05:04:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 06:04:03 -0300
Subject: r' question
References: <20080518023835.61FE61E4009@bag.python.org>
	<op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<20080518054915.9555B1E4007@bag.python.org>
Message-ID: <op.ubcd412cx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 02:49:03 -0300, Dick Moores <rdm at rcblue.com> escribi?:

> However, (please refer back to my original post)
> I want to keep the fstr, ultimately to be the
> string entered by the user who knows a bit about
> regex, but not how to use r'  ' . Or
> alternatively, not assume any knowledge of regex,
> but build in some options, such as ignoring/not
> ignoring case, searching on just a string, or on
> a word. So I want to know how to build the user's
> fstr into regex. I apologize for not making this clear.

Ok, supose the user enters "joe (home)" and you want to build a regular expression to find that words surrounded by space:

fstr = "joe (work)"
regex = r"\s" + fstr + r"\s"

This doesn't work exactly as expected, because "(" and ")" have a special meaning in a regular expression; use re.escape:

regex = r"\s" + re.escape(fstr) + r"\s"

You may use "\\s" instead of r"\s", it's the *same* string. The r prefix is just a signal, it says how to interpret the source code, not part of the string.

-- 
Gabriel Genellina



From eliben at gmail.com  Wed May 28 12:09:14 2008
From: eliben at gmail.com (eliben)
Date: Wed, 28 May 2008 09:09:14 -0700 (PDT)
Subject: accessing class attributes
Message-ID: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>

Hello,

I have a game class, and the game has a state. Seeing that Python has
no enumeration type, at first I used strings to represent states:
"paused", "running", etc. But such a representation has many
negatives, so I decided to look at the Enum implementation given here:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486

So, I've defined:

class Game:
  self.GameState = Enum('running', 'paused', 'gameover')

  def __init__
   ... etc

Later, each time I want to assign a variable some state, or check for
the state, I must do:

  if state == self.GameState.running:

This is somewhat long and tiresome to type, outweighing the benefits
of this method over simple strings.

Is there any better way, to allow for faster access to this type, or
do I always have to go all the way ? What do other Python programmers
usually use for such "enumeration-obvious" types like state ?

Thanks in advance
Eli


From ppearson at nowhere.invalid  Sat May  3 13:48:32 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Sat, 03 May 2008 12:48:32 -0500
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
	<ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
	<481b35eb$0$24406$5fc3050@news.tiscali.nl>
Message-ID: <IpadnTXNrLntOIHVnZ2dnUVZ_qSonZ2d@supernews.com>

On Fri, 02 May 2008 17:40:02 +0200, Paul Melis wrote:
>
> I'm not sure you've been helped so far as you seem to already understand 
> about pyvtk not being the official VTK bindings :)
>
> So, what would you like to know?

Thanks, I think I'm set.  For the benefit of the next instance of
me googling around trying to get started driving VTK from Python,
here's what I wanted to find:

 - Ignore pyvtk.

 - Import vtk.

 - To see how to drive VTK from Python, run all the files
   of the form /usr/share/vtk/.../*.py and see which ones
   do something like what you want to do.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From d3vvnull at gmail.com  Thu May  8 10:28:37 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 09:28:37 -0500
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
	<18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>
Message-ID: <170543c70805080728y4d81f0b5o9b76cbe170bc55e5@mail.gmail.com>

I miswrote my question.  But I still completely understand.  What I really
wanted to know was whether there was something equivalent to how perl can
perform inplace edits of a file with something like the magic $^I variable.


I see from Gabriel that you can use the fileinput module to  achieve this.
Very cool.

And yeah, I think ruby is very perl-like, in that like perl, which looks
like someone duct-taped shell, sed, awk and c into a scripting language,
ruby duct-taped perl, Smalltalk and Python together.

On Thu, May 8, 2008 at 7:49 AM, David <wizzardx at gmail.com> wrote:

> On Thu, May 8, 2008 at 2:11 PM, Michael Mabin <d3vvnull at gmail.com> wrote:
> > Does python have an equivalent to Perl's inplace-edit variable $^I?
> >
>
> I misread your question.
>
> No, Python eschews magic characters and symbols. They make code ugly
> and harder to read and maintain.
>
> The first 3 lines of the Zen of Python:
>
> Beautiful is better than ugly.
> Explicit is better than implicit.
> Simple is better than complex.
>
> You might find a variable like that in Ruby, which has strong Perl
> influences.
>
> David.
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From gagsl-py2 at yahoo.com.ar  Mon May  5 01:28:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:28:30 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>
Message-ID: <op.uan1hsg0x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:09:02 -0300, hdante <hdante at gmail.com> escribi?:

>  Isn't this guy a bot ? :-) It's learning fast. I believe there is a
> "frame" in C, composed of its stack and globals. For generators in C,
> you may look for "coroutines". For example, see:
>
> http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
>
>  A sample code follows:
>
> #define crBegin static int state=0; switch(state) { case 0:
> #define crReturn(i,x) do { state=i; return x; case i:; } while (0)
> #define crFinish }
> int function(void) {
>     static int i;
>     crBegin;
>     for (i = 0; i < 10; i++)
>         crReturn(1, i);
>     crFinish;
> }
>
>  The "suspended state" is saved in the static variable. It's not
> necessary to save the complete "frame", only the suspended state.

Quoting the author himself, "this is the worst piece of C hackery ever seen"

-- 
Gabriel Genellina



From alokkat at gmail.com  Tue May 13 21:17:10 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Tue, 13 May 2008 21:17:10 -0400
Subject: libxml2 Installation for Python 2.4
Message-ID: <e3a81e680805131817o1780db45xa9d3c024ba93e489@mail.gmail.com>

Hi,

Can someone point me how to install libxml2 for python. It works fine on my
Redhat 4.0 linux Box, but when I am trying to run my script on ARM target ,
it throws import error for libxml2.

I am using xpath in my script and in header trying to import libxml2.

Thanks in advance.
Alok
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From pavlovevidence at gmail.com  Thu May 22 19:32:07 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 22 May 2008 16:32:07 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <0c6091d2-4658-49f2-8f5d-9553d4aa3685@a70g2000hsh.googlegroups.com>

On May 22, 12:14 pm, cm_gui <cmg... at gmail.com> wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

I expect Dave Parker here any minute to tell us how Flaming Thunder
isn't slow.


Carl Banks


From ukaluzhny at nds.com  Thu May 15 02:41:51 2008
From: ukaluzhny at nds.com (urikaluzhny)
Date: Wed, 14 May 2008 23:41:51 -0700 (PDT)
Subject: [x for x in <> while <>]?
Message-ID: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>

It seems that I rather frequently need a list or iterator of the form
[x for x in <> while <>]
And there is no one like this.
May be there is another short way to write it (not as a loop). Is
there?
Thanks


From notnorwegian at yahoo.se  Sun May 25 02:37:00 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 23:37:00 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
Message-ID: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>

im writing a webcrawler.
after visiting a new site i want to store it in alphabetical order.

so obv i want fast insert. i want to delete duplicates too.

which datastructure is best for this?


From ptbremer at gmail.com  Mon May 19 19:28:06 2008
From: ptbremer at gmail.com (Timo)
Date: Mon, 19 May 2008 16:28:06 -0700 (PDT)
Subject: Mac OS distultils probelm
Message-ID: <543d2586-941d-4a9c-ae91-d5c752979034@p25g2000pri.googlegroups.com>

Hello there,

I'm working on a python extension module that I'm trying to install
using the distutils setup tools and I am running into a strange linker
problem. Here is the situation: I have a bunch of code (swig-wrapped C+
+ in this instance) that I want to compile into a module. The
compilation itself works just fine and so does the initial linking.
The linker command that distutils spits out looks somewhat like this

g++  -bundle -undefined dynamic_lookup mymodule_wrap.o  -o
_mymodule.so -framework Carbon -framework Cocoa -framework
ApplicationServices -framework AGL -framework OpenGL -framework GLUT -
framework Cocoa /usr/lib/libz.dylib

However, when I load the module in python a whole bunch of system
symbols are undefined starting in this case with aglSwapBuffers

ImportError: dlopen(_mymodule.so, 2): Symbol not found:
_aglSwapBuffers
Referenced from: _mymodule.so  Expected in: dynamic lookup

My understanding is that the _mymodule.so file should "know" that this
symbol came out of the AGL framework and thus look for it there. I
could understand if python wouldn't find the framework because of a
DYLD_LIBRARY_PATH issue or the like but here the problem seems to be
that the information from where the symbol came from is lost.

If I do a "more" on the _mymodule.so file that seems to be indeed what
happens. I see links to "/usr/lib/libz.dylib" and the system libraries
in there but none to the frameworks. However, now comes the really
interesting part. If I execute the *identical* command line from the
same shell I called "python setup.py install" from I get a different
library which *does* include the links to the frameworks. If I install
that file instead of the original everything works as expected.

So there seems to be a strange problem inside distutils. I looked at
that source code but couldn't make any sense out of it. Any idea of
what could cause this and how this could be fixed would be greatly
appreciated

Thanks
Timo



From kay.schluehr at gmx.net  Thu May 22 00:25:11 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 21 May 2008 21:25:11 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<a569e394-2409-487d-88b2-a8fb3c904cb1@p25g2000hsf.googlegroups.com>
Message-ID: <62e09b0a-468a-40b4-8202-e6c6a325a383@b1g2000hsg.googlegroups.com>

On 21 Mai, 19:56, sturlamolden <sturlamol... at yahoo.no> wrote:
> On May 21, 11:38 am, boblat... at googlemail.com wrote:
>
> > if (match = my_re1.match(line):
> >   # use match
> > elsif (match = my_re2.match(line)):
> >   # use match
> > elsif (match = my_re3.match(line))
> >   # use match
>
> > ...buy this is illegal in python.
>
> Assignment expressions is disallowed in Python to protect against a
> very common bug in C/C++ programs, the (accidental) confusion of
>
>    if (match = my_re1.match(line))
>
> with
>
>    if (match == my_re1.match(line))
>
> or vice versa.

This is just a syntactical issue. But what is the *value* of an
assigment? In Python it is always None: assigments are statements, not
expressions.

However Guido and team have found a *pragmatic* solution for this at
another place:

with open("myFile") as f:
    BLOCK

Compare this with a possible syntactical form of an if-statement:

if EXPR as NAME:
    BLOCK

This isn't ugly syntax-wise. It's just a bit harder to understand the
semantics of an if-statement. It might read like this:

"Evaluate EXPR and compute bool(EXPR). If this value is True assign
EXPR to NAME and execute BLOCK. Otherwise refuse both assigment and
BLOCK execution."

Maybe assignment can be performed unconditionally as in the C case.
I'm not sure about this.


From mensanator at aol.com  Fri May  2 15:04:54 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 12:04:54 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
Message-ID: <9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>

On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
> Mensanator wrote:
> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
> >> Shawn Milochik wrote:
> >>> How does one "plonk" stuff from Google Groups? Specifically, how
> >>> can this be done in Gmail?
> >> Set up a filter that looks for some phrase in the mail headers that
> >> identifies messages originating from google groups. ?Gmail's filters are
> >> fairly flexible. ?I'd probably just have it look for certain words.
> >> Look at an e-mail's source (raw view) and particularly check in the
> >> headers for things to filter by.
>
> > Why don't you just block all messages from Gmail?
>
> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
> (implying it's use for his own posting and viewing the list) that would
> work splendidly for him! ?Or not.
>
> Of course you're not likely to see this message either since I and many
> folks on here post from gmail.
>
> Spam comes mainly from Google Groups, not as much from Gmail in my
> experience.

I didn't say it was POSTED from gmail, but the spammers often have
gmail addresses, to wit:

 age of empires 3 crack serial     		1 soray6034... at gmail.com (1
author) Apr 30
 microsoft office word 2007 keygen download     1
soray6034... at gmail.com (1 author) Apr 30
 ulead video studio 8 serial crack    		1 soray6034... at gmail.com (1
author) Apr 30
 daylight savings time patch     		1 soray6034... at gmail.com (1 author)
Apr 30
 the sims 2 crack     				1 soray6034... at gmail.com (1 author) Apr 30
 fifa manager 08 crack     			1 meisnernel73... at gmail.com (1 author)
Apr 30
 autocad 2005 cracks and cheats     		1 meisnernel73... at gmail.com (1
author) Apr 30
 rar password crack    				2 meisnernel73... at gmail.com (1 author) Apr
30
 crack rock cooking     			1 meisnernel73... at gmail.com (1 author) Apr
30
 vws crack     					2 meisnernel73... at gmail.com (1 author) Apr 30

Why aren't you blaming gmail for it's contribution to the problem?


From pistacchio at gmail.com  Thu May  8 07:23:59 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 13:23:59 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <fvunsh$jjm$1@aioe.org>

Raxit at MyKavita.com ha scritto:
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
> 

well, it's similar in the sense that it is a programming language. So 
you can say that assembly is similar to BASIC, but that both are 
different from finnish, but from a programmer's point of view, they're 
all rather different languages.

> what can i do easily with python which is not easy in c++/java !?
>

generally speaking python is said to be easier to pick up for a pletora 
of reasons. technically speaking, it is not, for example, strongly 
typed, nor it forces you to use a programming paradigm like object 
oriented programming.
This means that if you just want to see your name printed on the screen 
you can simply write:

print "raxit"

and get the work done. to understand it you just have to understand some 
basics like what is a string and what is a statement.

in java, for example, it would look like:

public class HelloWorld {
      public static void main(String[] args) {
          System.out.println("raxit");
      }
  }

in short, to obtain the same result (limited to this case) you have to 
write 650% more code and you're forced to know what is a class, what 
namespace means, what is a function (and arguments) and what are methods 
and the dot notation and an array. not that you won't encounter all of 
them learning python, but you're presented with all of them, all at 
once, in the moment where you just want to write the simplest program. 
that's why a typical java beginner's guide starts with ditto examples 
and adds: "ignore everything for the moment". i hate when i have to 
ignore things of a code that i'm writing!

the same applies to C# and, to a certain extend, C++ that is a much 
older language and present different learning problems.
Now, what can you do with python? Virtually everything (network 
programming, game programming, server side scripting). In most cases, it 
would run slower than it would do with the other languages (even slower 
than the slow java). You won't do drivers or kernels in python, but you 
won't even code them in java or C#.
the programs you'll write will mostly run on a number of different 
platform, like java programs. porting a c++ is a bit tougher. at the 
moment there is project (mono) that is porting the .net platform (where 
c# runs) to multiple platforms, but basically, if you write a c# program 
you're programming for windows.
hope it helps



> Tnx,
> Raxit
> www.mykavita.com


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun May 11 17:35:59 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 May 2008 23:35:59 +0200
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <68p75vF2ubdpbU1@mid.individual.net>

Gandalf wrote:
> On May 10, 2:36 pm, Bjoern Schliessmann <usenet-

>> It depends on your web server configuration. To get your web
>> server execute Python code, there are several alternatives like
>>
>> * CGI
>> * FastCGI
>> * mod_python
>
> my server is my computer 

I didn't mean which server hardware you use, but which web server
application. You need a web server application to use your "WWW
directory" in such a way.

> and all i did way to install python on it.

Nah, you probably have at least an operating system beneath Python.

Regards,


Bj?rn

-- 
BOFH excuse #264:

Your modem doesn't speak English.



From turian at gmail.com  Sat May 10 02:38:16 2008
From: turian at gmail.com (Joseph Turian)
Date: Fri, 9 May 2008 23:38:16 -0700 (PDT)
Subject: Find more than one error at once
Message-ID: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>

Is it possible to coax python to find more than one error at once?

Thanks,
  Joseph


From dfnsonfsduifb at gmx.de  Sat May 24 07:12:13 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:12:13 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
Message-ID: <dp9lg5xvm8.ln2@joeserver.homelan.net>

Carl Banks schrieb:

> p = myfunction()
> if p:
>     print p
> 
> (I recommend doing it this way in C, too.)

This is okay for if-clauses, but sucks for while-loops:

while (fgets(buf, sizeof(buf), f)) {
	printf("%s\n", buf);
}

is much shorter than

char *tmp;
tmp = fgets(buf, sizeof(buf), f);
while (tmp) {
	printf("%s\n", buf);
	tmp = fgets(buf, sizeof(buf), f);
}

> For the case where you want to do this in an elif-clause, look for the
> recent thread "C-like assignment expression?" which list some
> workarounds.  Or just Google this newsgroup for "assignment
> expression".  It's one of few minor irritating things in Python
> syntax.

Alright, I will. Thanks.

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From hat at se-162.se.wtb.tue.nl  Fri May 16 08:01:08 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 14:01:08 +0200
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>
	<slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>
	<1ff9bbaa-ae04-495a-a9a3-d2f7741e6cc5@k10g2000prm.googlegroups.com>
Message-ID: <slrng2qts4.9mc.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Venkatraman.S. <venkat83 at gmail.com> wrote:
> The problem being, if i change the config file, then the configobj has
> to reload this file again. I do not want to 'refresh' the config obj
> per transaction but only when the config params change.

If you have trustable time stamps at your file system, you could check the time
stamp before loading.

> I was thinking along the terms of an Interrupt driven program, which
> when getting a custom interrupts reloads the file - any potential
> loopholes/falls that anyone can anticipate?

Many unix deamons use SIGHUP signal to reload configs.
Maybe that would be an option?


Sincerely,
Albert



From paul at rudin.co.uk  Fri May 23 04:30:42 2008
From: paul at rudin.co.uk (Paul Rudin)
Date: Fri, 23 May 2008 09:30:42 +0100
Subject: Ploneboard - grouping forums and setting up on disk
Message-ID: <87tzgpzakt.fsf@rudin.co.uk>


I'm investigating using ploneboard and have a couple of questions.

First of all I don't quite get what the global view/local view
distinction is - perhaps someone could be good enough to explain what
it's for.

If it possible to group forums so that permissions can be applied to
each set so - for example - we have a set of public forums viewable by
everyone and a set of member's forums viewable only by logged in
members. I understand that permission can be set for each forum
individially, but it would be nice to have a grouping so that a new
forum can be added to a group and it automatically gets the appropriate
permissions for that group.

Finally - is it possible to configure the available forums and
permission on disk, so that a given forum structure can easily be setup
in a new plone instance without having to redo it through the web each
time?

TIA.


From bj_666 at gmx.net  Sat May 10 02:38:28 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 May 2008 06:38:28 GMT
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <68ku74F2sm1usU1@mid.uni-berlin.de>

On Sat, 10 May 2008 00:20:33 -0500, Kenneth McDonald wrote:

> Any guesses as to how many people are still using Tkinter? And can  
> anyone direct me to good, current docs for Tkinter?

AFAIK `Tkinter` hasn't changed much over time, so "old" documentation is
still current.

Ciao,
	Marc 'BlackJack' Rintsch


From toddw at activestate.com  Mon May  5 16:59:55 2008
From: toddw at activestate.com (Todd Whiteman)
Date: Mon, 05 May 2008 13:59:55 -0700
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
	<715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <481F754B.8060505@activestate.com>

TkNeo wrote:
> ok i have tried around a lot but no luck. I think M2Crypto is my best
> option except it requires a minimum of python 2.4 which i don't have.
> 
> What i am trying to do is to do an FTP transfer that uses SSL
> (username, password authentication) and not a certificate file. The
> few example i have found of the Openssl module use a certificate for
> authentication unlike what i want to do.

Komodo uses ssl to provide FTPS support (FTP over SSL), using the Python 
ssl socket library. From memory, I think there were problems trying to 
get FTPS to work on earlier versions of python (earlier than Python 2.4) 
and also a few problems working with Python 2.4 itself.

This code might provide some help (you can search for FTPS):
http://svn.openkomodo.com/openkomodo/view/openkomodo/trunk/src/components/koFTP.py

Cheers,
Todd


From jj.renes at hccnet.nl  Sun May  4 10:56:14 2008
From: jj.renes at hccnet.nl (joop renes)
Date: Sun, 04 May 2008 16:56:14 +0200
Subject: multirhreading&boost.python
Message-ID: <1209912974.11364.10.camel@van-dattum>

hi,
i hope this is the right list for the following question of a c++
hacker,python newbie. i have a library in c++ to which i want to add a
python GUI and other python stuff.The library has multithreading
components, while python uses a reference counted memory model. Usually
mixing reference counting with multithreading is frowned upon, at least
in the c++ world. what am i to expect in the python world, if i bring
multithreading c++ into it? just performance penalty or total disaster?
best regards
joop renes.


 



From certo at comeno.it  Mon May 26 14:09:31 2008
From: certo at comeno.it (imho)
Date: Mon, 26 May 2008 18:09:31 GMT
Subject: About Michele Simionato's "classinitializer" decorator
In-Reply-To: <5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>
References: <qaC_j.85793$FR.319565@twister1.libero.it>
	<5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>
Message-ID: <v1D_j.85835$FR.319683@twister1.libero.it>

Michele Simionato ha scritto:
> On May 26, 7:10 pm, imho <ce... at comeno.it> wrote:
>> Hi all.
>> I just send this post as a comment to the third part of Michele
>> Simionato's article about metaprogramming techniques at:
>>
>> http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT...
>>
>> I found extremely useful the classinitializer "trick".
> 
> I never use it. Too clever. I am waiting for class decorators
> in Python 2.6.

Uhm... I suspected that :-)

>> I was thinking
>> over the caveat not to call a class initializer after the _metaclass_
>> hook (an exception being raised in that case).
>> Am I wrong if I state there's a plain solution to this ?
> 
> I think your solution is fine. Still, consider waiting for
> class decorators ;)
> 
>        Michele Simionato

Of course, I stand waiting here :-)

Thanks, Diego.



From mal at egenix.com  Tue May  6 05:38:11 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 11:38:11 +0200
Subject: config files in python
In-Reply-To: <32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>	<482017EA.40706@egenix.com>
	<32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>
Message-ID: <48202703.2020800@egenix.com>

On 2008-05-06 11:07, Jorge Vargas wrote:
> On Tue, May 6, 2008 at 4:33 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>> On 2008-05-06 01:16, Matimus wrote:
>>
>>> On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
>>>
>>>> Hi,
>>>>  In my application, I have some configurable information which is used
>>>> by different processes. currently I have stored configration in a
>>>> conf.py file as name=value pairs, and I am importing conf.py file to
>>>> use this variable. it works well
>>>>
>>>> import conf
>>>> print conf.SomeVariable
>>>>
>>>> but if I need to change some configuration parameteres,  it would need
>>>> me to restart processes.
>>>>
>>>> I want to store this data in some conf file (txt) and would like to
>>>> use it same way as I am using these variables as defined in py
>>>> files.
>>>>
>>>> one solution I can think of is writing data as a dictionary into conf
>>>> file. and then by reading data, apply eval on that data. and update
>>>> local dict? but this is not a good solution....
>>>>
>>>> any pointers?
>>>>
>>>> Sandip
>>>>
>>> I would load the configuration file using `imp.load_source'. This
>>> allows you to load the config file by filename, and gets away from the
>>> issue of accidentally importing a file somewhere else in pythons
>>> search path. Also, calling imp.load_source will reload the module when
>>> called a second time.
>>>
>>  >
>>
>>> http://docs.python.org/lib/module-imp.html
>>>
>>  Why not just use execfile() ?
>>
>>  http://www.python.org/doc/2.2.3/lib/built-in-funcs.html
>>
> that is very bad for this case, from what he is suggesting this is a
> server install so you are basically giving a vector of remote code
> execution (same with the first approach) but then execfile has the
> issue that it goes into your current namespace possibly creating a
> namespace crash which is even worst because an attacker can shallow
> say your auth module with something that will just return.

Not really: you can pass in the globals and locals dictionary
to execfile(), just like you can with __import__(), but you can't
with imp.load_source(), so execfile() is safer than using import
directly or via the imp module.

I don't see a problem with remote code execution - there's nothing
"remote" in loading a local config :-)

Also, you can pretty prevent all code execution that goes beyond simple
evals by restricting the globals, e.g.

globals = {'__builtins__':{}}
execfile('config.py', globals)

Doing so will prevent imports and doesn't expose the builtins
either, so there's little left for a user of the server
to manipulate - besides doing so by just inserting his own
os.py or similar common Python module would be far easier
anyway ;-)

>>> [conf.py]
>>> a = 1
>>> b = 2
>>> class c:
>>>    a = "hello"
>>>    b = "world"
>>> [/end conf.py]
>>>
>>>
>>>>>> conf = imp.load_source("conf", "./conf.py")
>>>>>> conf.a
>>>>>>
>>> 1
>>>
>>>>>> conf.b
>>>>>>
>>> 2
>>>
>>>>>> conf.c.a
>>>>>>
>>> 'hello'
>>>
>>>>>> conf.c.b
>>>>>>
>>> 'world'
>>>
>>>
>>>
>>> There are so many ways potential solutions to your problem that,
>>> without any more details, it is hard to suggest anything.
>>>
>>> Here are some potential solutions:
>>>
>>> ConfigParser - module for handling ini files
>>> xml - several built-in modules for handling XML files
>>> sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
>>> for config data)
>>> windows registry  - _winreg module
>>> pickle - serialize python objects
>>> marshal - similar to pickle, only works for simple objects
>>>
>>> Those are just the built-in solutions. If you wanna look at 3rd party
>>> solutions, prepare for overload. The number of alternative INI parsers
>>> alone is staggering.
>>>
>>> Also, there are many ways to organize your data and use a solution
>>> similar to what you are already using.
>>>
>>> I guess what I'm trying to say is... don't roll your own, it would be
>>> a waste of time, this problem has been solved 100s of times. That is,
>>> unless you want to do it for fun.
>>>
>>> Matt
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>  --
>>  Marc-Andre Lemburg
>>  eGenix.com
>>
>>  Professional Python Services directly from the Source  (#1, May 06 2008)
>>  >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>  >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>  >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
>>  ________________________________________________________________________
>>
>>  :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>>
>>
>>    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>>     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>>            Registered at Amtsgericht Duesseldorf: HRB 46611
>>
>>
>>  --
>>  http://mail.python.org/mailman/listinfo/python-list
>>

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From andreas.tawn at ubisoft.com  Thu May 15 13:20:58 2008
From: andreas.tawn at ubisoft.com (Andreas Tawn)
Date: Thu, 15 May 2008 19:20:58 +0200
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com><A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p><mailman.1174.1210868506.12834.python-list@python.org>
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
Message-ID: <8AEDA5E3386EA742B8C24C95FF0C75800403F7BC@PDC-MAIL3.ubisoft.org>

>print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
>\training_set') returns False...
>
>i have thourogly checked the filename to be correct and if we assume
>it is what could this mean then?
>i had a problem one other time when i had renamed a file but windows
>didnt rename it compeltely apparently.

It's escape characters again.

You're asking for
'C:\Users\saftarn\Desktop\NetFlixDataSet\training_set', but Python
interprets that as 'C:\Users\saftarn\Desktop\NetFlixDataSet
raining_set', which probably doesn't exist.

The first example works by accident because backslash plus the first
letter of each folder in your path happens to not match any of Python's
string formatting characters.

Use forward slashes or double up the backslashes to stop this happening.

Cheers,

Drea


From asmodai at in-nomine.org  Thu May  8 07:19:34 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Thu, 8 May 2008 13:19:34 +0200
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
Message-ID: <20080508111934.GB1016@nexus.in-nomine.org>

-On [20080507 15:06], Mike Driscoll (kyosohma at gmail.com) wrote:
>http://genshi.edgewall.org/
>http://www.kid-templating.org/
>http://www.cheetahtemplate.org/
>http://turbogears.org/

Add the following to that list:

http://jinja.pocoo.org/
http://www.makotemplates.org/

I think Jinja and Mako are currently two of the fastest around.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
If Winter comes, can Spring be far behind..?


From mensanator at aol.com  Fri May  9 00:58:42 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 21:58:42 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com> 
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <98967816-e310-4b59-a444-26fe0b37d550@a23g2000hsc.googlegroups.com>

On May 8, 11:47?pm, Yves Dorfsman <y... at zioup.com> wrote:
> Mensanator wrote:
> >> 2. python requires to pass "self" to all instance methods
>
> > Who uses methods?
>
> Is this a joke ?

Yes.

> What are the alternatives ?
>
>
>
> >> and I missed ":" often. :)
>
> > Try using something like Seed7, where you have to use "then" with
> > "if" and "do" with "while" and "end" in every block. Maybe you'll
> > come to appreciate significant whitespace and ":".
>
> I see the point of the OP. Couldn't the new-line be used as an equivalent of
> ? ':', for example, do you find this difficult to read:
>
> if a == 3
> ? ?do_something()
>
> if a == 3: do_something()
>
> And surely, it should be easy to parse by the compiler.

If they were to chane it, I wouldn't complain.

I just think it doesn't deserve complaints when
compared to other systems.

>
> Yves.http://www.SollerS.ca



From denis.kasak2718281828 at gmail.com  Sun May 25 18:36:49 2008
From: denis.kasak2718281828 at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 00:36:49 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1cpm1$jmf$1@aioe.org>

On Sun, May 25, 2008 at 1:43 PM, Martin Manns <mmanns at gmx.net> wrote:
 > Hi,
 >
 > I try to get a set of lambda functions that allows me executing each
 > function code exactly once. Therefore, I would like to modify the set
 > function to compare the func_code properties (or the lambda
 > functions to use this property for comparison).
 >
 > (The reason is that the real function list is quite large (> 1E5), there
 > are only few functions with non-equal code and the order of execution
 > is not important.)
 >
 > How can I achieve this?
 >
 > >>> func_strings=['x', 'x+1', 'x+2', 'x']
 > >>> funclist = [eval('lambda x:' + func) for func in func_strings]
 > >>> len(funclist)
 >  4
 > >>> len(set(funclist))
 >  4
 > >>> funclist[0].func_code == funclist[3].func_code
 >  True
 > >>> funclist[0] == funclist[3]
 >  False

Isn't this a bug? Shouldn't it be possible to create a set of
different lambda functions via a loop? At first I thought it was just
a quirk of list comprehensions, but the following example also yields
incorrect (or at least unintuitive) results:

 >>> spam = []
 >>> for i in range(10):
...   spam.append(lambda: i)
 >>> spam[0]()
9
 >>> spam[1]()
9

Manually creating the lambdas and appending them to a list works as
expected, naturally; I don't see a good reason why it wouldn't work
with a loop. Am I missing something?

--
Denis Kasak


From h.goebel at goebel-consult.de  Sat May 17 13:48:42 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Sat, 17 May 2008 19:48:42 +0200
Subject: rst2mediawiki?
Message-ID: <482f1a7a$0$6552$9b4e6d93@newsspool3.arcor-online.net>

Hello,

I'm looking for a rst2mediawiki writer. Unfortunatly mediawiki is quite 
widespread, but I prefere to sty with rst. Any hint?

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From arkanes at gmail.com  Wed May 21 17:17:59 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 21 May 2008 16:17:59 -0500
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <4866bea60805211417l3e6197e4ue83b27d27b6a0277@mail.gmail.com>

On Wed, May 21, 2008 at 3:56 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
>> My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.
> --

If you're going to use every post and question about Python as an
opportunity to pimp your own pet language you're going irritate even
more people than you have already.


From notbob at nothome.com  Mon May  5 14:43:11 2008
From: notbob at nothome.com (notbob)
Date: Mon, 05 May 2008 18:43:11 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <3zITj.35199$gB5.25251@fe105.usenetserver.com>

On 2008-05-04, notbob <notbob at nothome.com> wrote:

> I'm trying to learn how to program.  I'm using:
>   
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition

http://openbookproject.net//thinkCSpy/index.xhtml

OK then, using the above, I get everything up till chap 3 and functions and
then it all falls apart.  I try using his code and nothing.  I'm running
vers 2.5.1 on slackware 12.  Here's what I don't get:

----------

"Here is an example of a user-defined function that has a parameter:


def print_twice(bruce):
    print bruce, bruce
    
This function takes a single argument and assigns it to the parameter named
bruce.  The value of the parameter (at this point we have no idea what it
will be) is printed twice, followed by a newline.  The name bruce was chosen
to suggest that the name you give a parameter is up to you, but in general,
you want to choose something more illustrative than bruce.

****ME****
is this just an example of how the def should be written and it doesn't
really do anthing... yet?  I read another newb explanation here:
http://www.codepedia.com/1/BeginnersGuideToPython_Functions
...and it doesn't work, either.  I define myfirstfunction in the pyth editor
and give the command print myfirstfuntion and I get back this:
<function myfirstfunction at 0xb7b9c994>
....when I add the ._doc_, it get this:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'function' object has no attribute '_doc_'
....so, there is a no go there, too.
****ME****


The interactive Python shell provides us with a convenient way to test
our functions.  We can use the import statement to bring the functions
we have defined in a script into the interpreter session.  To see how this
works, assume the print_twice function is defined in a script
named chap03.py.  We can now test it interactively by
importing it into our Python shell session:

****ME****
ok, I try and follow the above, but where is he getting the script?  So, I
make a script called chap03.py and put it in ~/pyth/chap03/.  
****ME****

>>> from chap03 import *
>>> print_twice('Spam')
Spam Spam
>>> print_twice(5)
5 5
>>> print_twice(3.14159)
3.14159 3.14159

****ME****
I then try an do the import thing above, but the pyth ed accepts none of it.
not from:
from ~/pyth/chap03/ import *       
from chap03 import *            #taken from ~/pyth/
....nor from any other configuration I can imagine, so that "from" command
makes no sense.  
****ME****


In a function call, the value of the argument is assigned to the
corresponding parameter in the function definition.  In effect, it is if
bruce = 'Spam' is executed when print_twice('Spam')
is called, bruce = 5 in print_twice(5), and
bruce = 3.14159 in print_twice(3.14159)."

****ME****
OK, I'm totally lost.  Neither the above or the other link works or make any
sense at all.  Is the above print_twice(5), etc, supposed to work like the
original print_twice(bruce) function (which still doesn't!), just with a
different parameter?  Call me stupid, but I'd sure like to get past this.
How am I supposed to get the original def to work?  I've yet to figure out
how to get plain ol':
bruce bruce
Yes, I've indented 4 spaces where I should.  
****ME****

----------

I feel dumber'n a bag 0' hammers and in need of clarification.

Thank you
nb


From sjmachin at lexicon.net  Fri May  9 19:52:50 2008
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 09 May 2008 23:52:50 GMT
Subject: regexp help
In-Reply-To: <1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>
Message-ID: <4824e3ce$1@news.mel.dft.com.au>

Paul McGuire wrote:
> from re import *

Perhaps you intended "import re".

> vowels = "aAeEiIoOuU"
> cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
> encodeRe = re.compile(r"([%s])[%s]\1" % (cons,vowels))
> print encodeRe.sub(r"\1",s)
> 
> This is actually a little more complex than you asked - it will search
> for any consonant-vowel-same_consonant triple, and replace it with the
> leading consonant.  To meet your original request, change to:
> 
> from re import *

And again.

> cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
> encodeRe = re.compile(r"([%s])o\1" % cons)
> print encodeRe.sub(r"\1",s)
> 
> Both print "prince".
> 

No they don't. The result is "NameError: name 're' is not defined".


From gnewsg at gmail.com  Sat May 31 15:40:15 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 31 May 2008 12:40:15 -0700 (PDT)
Subject: ThreadPoolingMixIn
References: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>
Message-ID: <d1f77941-4932-48bb-8aec-96facb1f1adc@a70g2000hsh.googlegroups.com>

On 30 Mag, 22:40, pavel.uva... at gmail.com wrote:
> Hi, everybody!
>
> I wrote a useful class ThreadPoolingMixIn which can be used to create
> fast thread-based servers. This mix-in works much faster than
> ThreadingMixIn because it doesn't create a new thread on each request.
>
> Is it worth including in SocketServer.py?
>
> from __future__ import with_statement
> from SocketServer import ThreadingMixIn
> import threading
> import Queue
> class ThreadPoolingMixIn(ThreadingMixIn):
> ? ? """Mix-in class to handle requests in a thread
> pool.
>
> ? ? The pool grows and thrinks depending on
> load.
>
> ? ? For instance, a threading UDP server class is created as
> follows:
>
> ? ? class ThreadPoolingUDPServer(ThreadPoolingMixIn, UDPServer):
> pass
>
> ? ? """
> ? ? __author__ = 'Pavel Uvarov <pavel.uva... at gmail.com>'
>
> ? ? def init_thread_pool(self, min_workers = 5,
> ? ? ? ? ? ? ? ? ? ? ? ? ?max_workers = 100, min_spare_workers = 5):
> ? ? ? ? """Initialize thread pool."""
> ? ? ? ? self.q = Queue.Queue()
> ? ? ? ? self.min_workers = min_workers
> ? ? ? ? self.max_workers = max_workers
> ? ? ? ? self.min_spare_workers = min_spare_workers
> ? ? ? ? self.num_workers = 0
> ? ? ? ? self.num_busy_workers = 0
> ? ? ? ? self.workers_mutex = threading.Lock()
> ? ? ? ? self.start_workers(self.min_workers)
>
> ? ? def start_workers(self, n):
> ? ? ? ? """Start n workers."""
> ? ? ? ? for i in xrange(n):
> ? ? ? ? ? ? t = threading.Thread(target = self.worker)
> ? ? ? ? ? ? t.setDaemon(True)
> ? ? ? ? ? ? t.start()
>
> ? ? def worker(self):
> ? ? ? ? """A function of a working
> thread.
>
> ? ? ? ? It gets a request from queue (blocking if
> there
> ? ? ? ? are no requests) and processes
> it.
>
> ? ? ? ? After processing it checks how many spare
> workers
> ? ? ? ? are there now and if this value is greater
> than
> ? ? ? ? self.min_spare_workers then the worker
> exits.
> ? ? ? ? Otherwise it loops
> infinitely.
>
> ? ? ? ? """
> ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? self.num_workers += 1
> ? ? ? ? while True:
> ? ? ? ? ? ? (request, client_address) = self.q.get()
> ? ? ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? ? ? self.num_busy_workers += 1
> ? ? ? ? ? ? self.process_request_thread(request, client_address)
> ? ? ? ? ? ? self.q.task_done()
> ? ? ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? ? ? self.num_busy_workers -= 1
> ? ? ? ? ? ? ? ? if self.num_workers - self.num_busy_workers > \
> ? ? ? ? ? ? ? ? ? ? ? ? self.min_spare_workers:
> ? ? ? ? ? ? ? ? ? ? self.num_workers -= 1
> ? ? ? ? ? ? ? ? ? ? return
>
> ? ? def process_request(self, request, client_address):
> ? ? ? ? """Puts a request into
> queue.
>
> ? ? ? ? If the queue size is too large, it adds extra
> worker.
>
> ? ? ? ? """
> ? ? ? ? self.q.put((request, client_address))
> ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? if self.q.qsize() > 3 and self.num_workers <
> self.max_workers:
> ? ? ? ? ? ? ? ? self.start_workers(1)
>
> ? ? def join(self):
> ? ? ? ? """Wait for all busy threads"""
> ? ? ? ? self.q.join()

This is not the right place to discuss about such a thing.
Post this same message on python-dev ml or, even better, open a new
ticket on the bug tracker attaching the patch and, most important, a
benchmark demonstrating the speed improvement.

--- Giampaolo
http://code.google.com/p/pyftpdlib/


From miller.paul.w at gmail.com  Mon May 26 01:41:10 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 22:41:10 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com> 
	<3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com>
Message-ID: <3a550801-6e43-4c81-9749-7cb157446668@y21g2000hsf.googlegroups.com>

On May 25, 11:40?pm, pball.benet... at gmail.com wrote:

> This is a problem in statistical estimation. Given n records made up
> of k variables, define a cell as the point in the cartesian product of
> v_1 * v_2 * ... * v_k. I want to apply an estimator on the data in
> each cell.

So, basically, V = (v_1, v_2, ... , v_{k-1}, v_k) can be regarded as
an abstract, k-dimensional vector, right?

If I understand your revised problem statement correctly, what you
really want to do is build a graph of these vectors, where graph
adjacency is equivalent to adjacency in your sense.  That is, imagine
you have V_1, V_2, ... , V_n all sitting out in front of you,
represented abstractly as simple points.  Draw a line between V_i and
V_j if they are "adjacent" in your sense of the word.  What you have
then is a graph structure where your version of adjacency exactly
corresponds to graph adjacency.  Then, in your language, a stratum is
simply a path in this graph, and finding those is easy.

That is, unless I've got this all wrong. :-)


From vlastimil.brom at gmail.com  Wed May  7 08:29:04 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 14:29:04 +0200
Subject: mxTexTools (Re: using sqlite3 - execute vs. executemany;
	committing ...)
In-Reply-To: <48217560.9070707@egenix.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<48217560.9070707@egenix.com>
Message-ID: <9fdb569a0805070529v67412125s98874723179bc309@mail.gmail.com>

2008/5/7, M.-A. Lemburg <mal at egenix.com>:
>
> On 2008-05-07 00:07, Vlastimil Brom wrote:
>
> > Thanks for reminding me about
> > the mxTextTools; I looked at this package very quickly several months
> > ago and it seemed quite
> > complex and heavy-weight, but maybe I will reconsider this after some
> > investigation ...
> >
>
> mxTextTools gives you almost full C speed while still being programmable
> in Python and without a compiler.
>
> It is a low level parsing engine. Here's talk I gave on mxTextTools
> last year:
>
>
> http://www.egenix.com/library/presentations/EuroPython2007-Parsing-Languages-with-mxTextTools/
>
> If you're looking for ways to hide the complexity, you could try
> SimpleParse (which uses mxTextTools for the parsing, but provides a
> grammar based front-end).
>
> --
> Marc-Andre Lemburg
> eGenix.com
>
> Professional Python Services directly from the Source  (#1, May 07 2008)
> >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
> >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
> >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
> ________________________________________________________________________
>
> :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>
>
>   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>           Registered at Amtsgericht Duesseldorf: HRB 46611
>

Thank you very much for the info and for the helpful references, Marc-Andre,
I'll definitely have to take a closer look at mxTextTools, thanks for making
it available.

Greetings,
 Vlasta
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From gagsl-py2 at yahoo.com.ar  Fri May  9 10:41:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:41:42 -0300
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <op.uav5rsoax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:02:01 -0300, Viktor <alefnula at gmail.com> escribi?:

> This completely slipped of my mind... :)
>
> I'm trying to change the:
> http://wordaligned.org/svn/etc/echo/echo.py
>
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
>
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function - tried
> with inspect also)... And what is most interesting, when I do:

The decorator receives the original, plain function (unless you chain decorators) and whatever it returns is used instead of the original function.

> def w(fn):
>     print 'fn:', id(fn)
>     return fn
>
> class A:
>     @w
>     def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
>
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...
> Is there a way to find out in the decorator "what will the decorated
> function be"?

Whatever you return from the decorator.
But the decorator returns a *function* and A.__init__ is a *method*, an instance method in fact. The function can be found as A.__dict__['__init__']. Try this:

m = A.__init__
print m, type(m), id(m)
f = A.__dict__['__init__']
print f, type(f), id(f)

A method combines a function with an instance that becomes the "self" argument. In your case you're building an "unbound" method because it's not tied to a particular instance, but even such unbound method is not the same thing as a plain function (it must ensure that its first argument, when called, is an A instance and not any other object).
The "magic" that converts a simple function into an instance method, for old-style classes like yours, was in the Class type itself. For new style classes, the descriptor protocol is used. See http://www.python.org/doc/newstyle/

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Fri May  2 10:43:02 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:43:02 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <87bq3ozs09.fsf@benfinney.id.au>

Roy Smith <roy at panix.com> writes:

> In article <87r6ckzvyv.fsf at benfinney.id.au>,
>  Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> 
> > Whereas if Python is *not* installed from an OS package, it's up
> > to the sys admin to ensure that it works -- not up to my program.
> > So I don't see the point in making it work by default, when what I
> > want for my program is that it works *with the default Python*,
> > not with some non-default installation.
> 
> Ben,
> 
> Have you ever shipped software to a customer?

Yes, and all parties have been quite happy with the results.

> Imagine the following conversation:
> 
> Customer: "Your product is broken. It says it can't find python, and
> I know I have it installed".
> 
> Vendor: "Where do you have it installed?"
> 
> Customer: "In /opt/bin/python"
> 
> Vendor: "Oh, that's your problem, it HAS to be in /usr/bin/python".

At this point the vendor isn't me, because this statement isn't true.
See below.

> Customer: "I can't install it there because <insert whatever silly
> reason the customer has>. If you can't make your product work
> without requiring me to install python in /usr/bin, I'm afraid I
> can't buy your product".

At this point they have the simple option of running the program with
'python /path/to/the/program'. It's certainly not a case of "can't
make the product work".

It is, however, a case of "can't automatically account for every local
customisation sysadmins choose to make on their systems". Perfectly
willing to work with them to get their specific environment working,
but as a matter of simple economics it's not worth my time to attempt
to make such corner cases work automatically.

> If you want to hard-code /usr/bin/python into your application,
> that's your decision. If you would like to take on the task of
> convincing every sysadmin in the world to do things the way you
> think they should be done, have fun.

If they've already chosen to install Python to some unpredictable
location, they know what they're doing enough to invoke the program in
a specific way to get it working.

-- 
 \     Rommel: "Don't move, or I'll turn the key on this can of Spam!" |
  `\                             -- The Goon Show, _Rommel's Treasure_ |
_o__)                                                                  |
Ben Finney


From terry.yinzhe at gmail.com  Sun May 18 11:29:17 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 08:29:17 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
Message-ID: <8c40793e-55bc-48de-96fa-47ebb89b9a88@u36g2000prf.googlegroups.com>

On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> escribi?:
>
> > Is there a simple way to get all the instances of one class? I mean
> > without any additional change to the class.
>
> Try with gc.get_referrers()
>
> py> import gc
> py> class A(object): pass
> ...
> py> a,b,c = A(),A(),A()
> py> A
> <class __main__.A at 0x00A3F4E0>
> py> for item in gc.get_referrers(A): print type(item)
> ...
> <type 'getset_descriptor'>
> <type 'getset_descriptor'>
> <type 'tuple'>
> <class '__main__.A'>
> <class '__main__.A'>
> <class '__main__.A'>
> <type 'dict'>
> <type 'dict'>
>
> We need to filter that list, keeping only A's instances:
>
> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> <__main__.A object at 0x00A40E18>]
>
> --
> Gabriel Genellina

Thanks! This is what I'm looking for.


From bruno.desthuilliers at gmail.com  Mon May 26 14:42:08 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 26 May 2008 11:42:08 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com> 
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com> 
	<g18su2$h6c$1@nemesis.news.neostrada.pl>
Message-ID: <ed926a5c-4ee9-44a2-a789-e7f0b83a299f@z72g2000hsb.googlegroups.com>

On 24 mai, 13:01, Piotr Chamera <piotr_cham... at poczta.onet.pl> wrote:
> bruno.desthuilli... at gmail.com pisze:
>
> > I don't know if you'd label it 'elegant', but as far as I'm concerned,
> > storing serialized objects as blobs in a relational database is mostly
> > non-sense. If I use a relational database, it's because it is a
> > *relational* database. If you want an OODB, then we have the ZODB,
> > Durus and a couple others.
>
> It is sometimes convenient to store objects in mature relational
> database backend (reliability,  stability, support, tools,
> replication, etc.). See latst efforts with RelStorage backend
> for ZODB (http://wiki.zope.org/ZODB/RelStorage) - it stores
> pickled Python objects in Oracle, PostgreSQL or MySQL)

You mean a SQL database backend here - the conveniences that you
mention have nothing to do with being relational or not. And that's my
point: pickling objects, you loose of the convenience of a
*relational* database.


From martin.laloux at gmail.com  Thu May 15 03:06:19 2008
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: Thu, 15 May 2008 00:06:19 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
	<3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com> 
	<c610ba4f-a832-451a-a997-1fb02a818e08@n1g2000prb.googlegroups.com>
Message-ID: <125b0b18-7d29-434a-8d8e-6d3fb67ff55f@y21g2000hsf.googlegroups.com>

search, search, it is a recurrent question....
for example

http://groups.google.be/group/comp.lang.python/browse_thread/thread/7bef767753fe40f1/a3fd7c2dd7a50bef?hl=fr&lnk=gst&q=mysqldb+mac#a3fd7c2dd7a50bef


From inhahe at gmail.com  Sat May 17 23:46:50 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 23:46:50 -0400
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <7ENXj.6906$255.106@bignews8.bellsouth.net>

what little I know:

The numbers I heard are that Python is 10-100 times slower than C.  So use 
Python if you can wait 10-100 times longer.  Although it won't really be 
that slow using numpy and/or psyco.

Python seems to have a really extensive reportoire of modules available for 
it.  Although I don't know about things in the math field.  If what you want 
is obscure enough, then you might find it for C/C++ and not Python.  You 
might find out in a few seconds by googling.

The advantage to Python (other than production time), is that it would be a 
lot simpler and more readable simply as a syntax for conveying algorithms. 
It would be like pseudo-code... but runnable. ;)







From cwitts at gmail.com  Fri May 16 02:51:07 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 15 May 2008 23:51:07 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>

On May 15, 5:13?pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> Hi,
>
> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
>
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:
>
> <code>
>
> import win32com.client
> import winshell
>
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
>
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> Firefox'
> shortcut.save()
>
> </code>
>
> This creates the following target path (which doesn't work):
>
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
>
> If I leave the website off, it works. If I leave the path to Firefox
> out, it works too. Is there another method I can use other than
> creating the shortcut by hand and using the shutil module?
>
> Thank you for any ideas.
>
> Mike

Don't set arguments in the path.

shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
shortcut.TargetPath = r'Program Files\Mozilla Firefox\firefox.exe'
shortcut.Arguments = r'https:\www.myCompanyWebsite.com\auth
\preauth.php'
shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
shortcut.save()


From deets at nospam.web.de  Wed May 21 05:46:48 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 11:46:48 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <69i9d8F2ubi9dU1@mid.uni-berlin.de>

boblatest at googlemail.com wrote:

> Hello,
> 
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
> 
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.

This might help:

-----------
s = "foo"

class Tester(object):

    def __call__(self, pattern):
        self.m = re.match(pattern, s)
        return self.m is not None

    def __getattr__(self, name):
        return getattr(self.m, name)

test = Tester()

if test("bar"):
    print "wrong"
elif test("foo"):
    print "right"
-------------


Diez


From mail at timgolden.me.uk  Thu May 29 04:30:33 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:30:33 +0100
Subject: run a script in vista
In-Reply-To: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>
References: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>
Message-ID: <483E69A9.70005@timgolden.me.uk>

Graham Feeley wrote:
> Hi, I have a script which runs in xp, however now I have upgraded to 
> vista this script now does'nt work
> Can someone help with this problem please ?
> this is the start of the script
> 
> import cPAMIE
> import cModalPopUp
> import winGuiAuto as wga
> import time, datetime
> import os, sys, re
> import mx.ODBC.Windows as odbc

You're not helping very much here: what does "now doesn't work" mean?
It doesn't even start? It runs but gives an error? If so, what's the traceback?
etc. etc.

TJG


From inhahe at gmail.com  Thu May 22 18:36:15 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:36:15 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
Message-ID: <LymZj.61584$3v1.36344@bignews3.bellsouth.net>

it seems like you can't do it exactly the way you're trying but you could do 
this

def __getitem__(*args):
  if len(args) > 1 and args[1]:  return self.get(args[0]) * 5
  return self.get(args[0])

then you would use it like

print foo['a']
print foo['a',True]
or even
print foo['a',"crazy"]
if you wanted.
or
crazy = True
print foo['a',crazy]




"Andreas Matthias" <amat at kabsi.at> wrote in message 
news:uf6hg5-ca9.ln1 at buckbeak.hogwarts...
> The following code doesn't run but I hope you get what I
> am trying to do.
>
>
> class my_dict (dict):
>
>    def __getitem__ (self, key, crazy = False):
>        if crazy == True:
>            return 5 * self.get(key)
>        else:
>            return self.get(key)
>
>
> foo = my_dict()
> foo['a'] = 123
>
> print foo['a']
> print foo['a', crazy = True]
>
>
> Is it somehow possible to overload __getitem__ with an additional
> argument? Are there other possibilities to achiev this? Or is
> the only solution to this to write a normal function call
> `def my_get (self, key, crazy=False)'?
>
>
> Ciao
> Andreas 




From kyosohma at gmail.com  Tue May 20 15:58:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 12:58:40 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
	<mailman.1395.1211312728.12834.python-list@python.org>
Message-ID: <f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>

On May 20, 2:45?pm, Tim Golden <m... at timgolden.me.uk> wrote:
> Bob Greschke wrote:
> > This MUST have been asked before, but I can't seem to Google the right
> > thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> > "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>
> A couple of options to get the ball rolling:
>
> 1) win32api.GetLogicalDriveStrings()


I gave this a go to see how it worked and ti gave me this:

'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'

Not exactly what I expected. Do I have to parse out the "\\\x00"
myself or is there an information level switch I should add?

>
> 2)http://timgolden.me.uk/python/wmi_cookbook.html#find-drive-types


This works as advertised. I was actually going to post that, but you
beat me to it.  :)

>
> TJG


Mike


From hdante at gmail.com  Thu May 15 19:42:24 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 23:42:24 +0000 (UTC)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org>
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
	<8AEDA5E3386EA742B8C24C95FF0C75800403F7BC@PDC-MAIL3.ubisoft.org>
Message-ID: <g0ihp0$6k1$1@ger.gmane.org>

Em Thu, 15 May 2008 19:20:58 +0200, Andreas Tawn escreveu:

>>print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
>>\training_set') returns False...
>>
>>i have thourogly checked the filename to be correct and if we assume it
>>is what could this mean then?
>>i had a problem one other time when i had renamed a file but windows
>>didnt rename it compeltely apparently.
> 
> It's escape characters again.
> 
> You're asking for
> 'C:\Users\saftarn\Desktop\NetFlixDataSet\training_set', but Python
> interprets that as 'C:\Users\saftarn\Desktop\NetFlixDataSet
> raining_set', which probably doesn't exist.
> 
> The first example works by accident because backslash plus the first
> letter of each folder in your path happens to not match any of Python's
> string formatting characters.
> 
> Use forward slashes or double up the backslashes to stop this happening.
> 
> Cheers,
> 
> Drea

 Hint: standardize the way you write paths in python:

import os.path
def _p(*x):
    return os.path.normpath(os.path.expanduser(os.path.join(*x)))

(in my system)

In [10]: print _p('abcd.txt')
abcd.txt

In [11]: print _p('~/abcd.txt')
/home/hdante/abcd.txt

In [12]: print _p('~/abcd/efgh.txt')
/home/hdante/abcd/efgh.txt

In [13]: print _p('~', 'abcd', 'efgh.txt')
/home/hdante/abcd/efgh.txt



From dullrich at sprynet.com  Tue May 27 08:49:00 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 07:49:00 -0500
Subject: decorators when?
Message-ID: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>

What version added decorators (using the
@decorator syntax)?

(Is there a general way I could have found out the answer myself?)

Is there a somthing such that "from __future__ import something"
will make decorators work in 2.5.2?


David C. Ullrich


From gandalf at shopzeus.com  Wed May 14 16:36:07 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 14 May 2008 22:36:07 +0200
Subject: Submitting data to HTTPS javascript
In-Reply-To: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>
References: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>
Message-ID: <482B4D37.9080100@shopzeus.com>

John Chandler wrote:
> I am trying to write a script to test certain functionality of a 
> website that requires users to login. The login page is simple, a few 
> pictures and two text bars (one for username and one for password). I 
> tried logging in with webbrowser, but that did not work because the 
> page uses javascript. I also tried using win32com though I have no 
> idea what I am doing. Any ideas?
- Use firefox :-)
- Install "LiveHTTPHeaders" http://livehttpheaders.mozdev.org/
- Open the plugin in one window and the website in another
- Enable "capture" in livehttpheaders (default)
- Login to the website
- Disable "capture" in livehttpheaders (default)
- Check the GET and POST requests in the capture log
- Try to send the same GET and POST requests from Python.
- Don't forget that most sites will also need cookies - you have to 
extract and send back cookies as needed

You do not need any GUI component for this job.

Other good things to have:

- Good knowledge of the "re" standard module, and regular expression syntax
- BeautifulSoup (especially ICanBelieveItIsBeautifulSoup...)

You might also check the "mechanoid" project. (I have never used it but 
it is said to be an automatized, controllable web browser???)

If anyone is interested, I can put up a python recipe that shows how to 
emulate a browser easily.

Best,

    Laszlo



From castironpi at gmail.com  Wed May 14 13:51:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:51:43 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com>
Message-ID: <499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com>

On May 14, 5:25?am, castiro... at gmail.com wrote:
> On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > you can safely ignore its posts.
>
> > > > How does it generate text?
>
> > > My guess is by inhaling a lot of intoxicants.
>
> > However you know what would be helpful? ?If I could go to the right
> > place to start the ring.
>
> I have a slightly sinister role on stage. ?Does anyone want to play?

I'd stay on mutability for the world domination factor.  Fluent
currency is buoyant currency; turn on a local clock, and someone gets
some cubic verticals.

Now if sense-reference is trading on the BDFL, I'm still holding Tron
can pretty well win work.


From eric at pixelwareinc.com  Tue May 13 18:09:17 2008
From: eric at pixelwareinc.com (Eric Anderson)
Date: Tue, 13 May 2008 15:09:17 -0700 (PDT)
Subject: Purpose of operator package
Message-ID: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>

I mainly work in other languages (mostly Ruby lately) but my text
editor (Scribes) is python. With python being everywhere for dynamic
scripting I thought I would read the source to learn the language
better (I've gone through some basic tutorials but I always prefer to
learn from real source).

So right from the start I see the following:

from operator import truth
if truth(argv):
  # blah blah blah

It is obvious they are testing to see if any command line arguments.
But curious for why the function is needed. So I look up the operator
package and fine it provides functions that are equivalent to the
native operators. So my question is why would someone right the above
instead of just

if argv:
  # blah blah blah

Seems like unnecessary code but obviously I know nothing about Python.

Thanks for any pointers!


From fuzzyman at gmail.com  Sat May 24 10:10:15 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 07:10:15 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>

On May 24, 2:44 pm, Roy Smith <r... at panix.com> wrote:
> In article
> <af66b0d4-f77d-4d54-8ee0-94592497d... at l64g2000hse.googlegroups.com>,
>
>  Fuzzyman <fuzzy... at gmail.com> wrote:
> > Also, like others, I have had wonderful experiences of trying to track
> > down test failures that depend on the order that tests run in. Having
> > interdependencies between tests is a recipe for madness...
>
> I agree that tests should not depend on each other, but sometimes it's
> still useful to have the tests run in a certain order for reporting
> purposes.
>
> If you're doing requirements tracking, it's nice to have the tests execute
> in the same order as the requirements are listed.  It makes interpreting
> the output easier.  Sure, you could give the test cases names like
> "test_fr17.3a" and write your own getTestCaseNames(), but just putting them
> into the file in the order you want them to run is easier.  And making
> things easy is what this is all about.

Whilst I understand your point, I think the danger is that you end up
with hidden dependencies on the test order - which you're not aware of
and that the tests never expose. Certainly layout your tests in a
logical order within the file, but I think you risk potential problems
by controlling the order they are run in. Other frameworks
specifically provide test order randomizers for this very reason.

A worthwhile question for the OP - your patch seems fairly simple. Is
it easy for you to extend unittest for your own testing needs by
subclassing?

Unittest should definitely be easy for people who *want* this to add
it to their own testing environment.


All the best,


Michael Foord
http://www.ironpythoninaction.com/


From s0suk3 at gmail.com  Wed May 28 03:58:32 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Wed, 28 May 2008 00:58:32 -0700 (PDT)
Subject: Does this path exist?
Message-ID: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>

I wanted to ask for ways to test whether a path exists. I usually use
os.path.exists(), which does a stat call on the path and returns True
if it succeeds, or False if it fails (catches os.error). But stat
calls don't fail only when a path doesn't exist. I see that, at least
on Windows, the instance of the exception has an attribute 'errno' set
to 2 when it fails because the path doesn't exist. Is it a portable
solution to rely on this (haven't tried it on Linux)? Are there other
ways of testing whether a path exists?

Thanks,
Sebastian


From daniel.a.esch at gmail.com  Tue May 13 17:59:24 2008
From: daniel.a.esch at gmail.com (Dan Esch)
Date: Tue, 13 May 2008 17:59:24 -0400
Subject: Learning Python and the Zen of the Mailing List
Message-ID: <fe50b9600805131459l3789cb0cof861b895cb4853c4@mail.gmail.com>

I decided to learn Python.

I decided to learn Python because I hate visual basic for applications and I
can feel my brain shrink everytime I invoke that freaking macro editor.
It's bad enough that Mwfdg Q%$#@%soft <MwfdgQ%$#@%sft>  had to eliminate the
original simple keystroke macro tools that were enough for us
knuckle-dragging accounting types - oh no! - they had to replace that tool -
that we understood - with the most brain dead, useless, overwrought piece of
crap abuse of programming language.

This forced me to learn how to program.  As I learned how to program, I
learned that Visual Basic wasn't as bad as I thought - it was far, far, far
worse.... I went to Dartmouth, and, Bill, you harvard dropout, I'd like to
inform you that President Kemeny is spinning in his grave for the
perversions you have inflicted upon his undergraduate-teaching-tool
toy-language.

So I write little toy programs and try to wrap my head around real
object-oriented programming and and real algorithms and data structures and
design my scratch-my-own-itch application in my head while I study.

In the mean time, I lurk on this mailing list - I don't have any real
questions yet - but reading the questions and answers has been a great way
of tapping into the pythonic Zen - I don't know if anyone is a similar
situation to me, but I recommend just randomly browsing the mailing list as
a means of getting in tune with the rhythm and esthetics of the language

Dan
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From bruno.desthuilliers at gmail.com  Mon May 19 16:53:31 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:53:31 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org> 
	<g0m9or$2qk0$1@news.mtu.ru>
Message-ID: <10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>

On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:
> > En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
> > <ivan.illario... at gmail.com> escribi?:
>
> >> After re-reading "Python is not Java" I finally came to conclusion that
> >> classmethods in Python are a very Bad Thing.
>
> >> I can't see any use-case of them that couldn't be re-written more
> >> clearly with methods of metaclass or plain functions.
>
> > A good use case for class methods are alternate constructors, like
> > dict.from_keys. I don't think an alternate constructor would be more
> > clear being a method of the metaclass - actually it belongs to the class
> > itself, not to its metaclass.
> > Metaclass methods are harder to find; they don't show in dir(instance)
> > nor dir(class).
> > Also the resolution order is harder to grasp for metaclasses - but this
> > may be just lack of usage from my part...
>
> >> They have the following issues:
> >> 1. You mix instance-level and class-level functionality in one place
> >> making your code a mess.
>
> > Not necesarily; some classmethods are naturally tied to the class
> > itself, not to the metaclass (like the constructor example above). But
> > yes, *some* classmethods could be written as methods of their metaclass
> > instead - but that doesn't always make sense.
>
> >> 2. They are slower than metaclass methods or plain functions.
>
> > Hu? How did you come to that?
> > I've done a small test and a class method wins by a very minuscule but
> > consistent advantage over a metaclass method:
>
> > class A(object):
> >      color = "red"
>
> >      @classmethod
> >      def foo(cls, x):
> >          return getattr(cls, x)
>
> > class MetaB(type):
> >      def foo(self, x):
> >          return getattr(self, x)
>
> > class B(object):
> >      __metaclass__ = MetaB
> >      color = "red"
>
> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> > "A.foo('color')"
> > 1000000 loops, best of 3: 1.19 usec per loop
>
> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> > "B.foo('color')"
> > 1000000 loops, best of 3: 1.2 usec per loop
>
> How did I come to this:http://code.djangoproject.com/changeset/7098
>
> I measured this and there was a marginal speed increase when classmethods
> wher moved to metaclass.

IIRC (please correct me if I'm wrong), this part of code is only
called when the class is created - in which case it makes sense to
move it where it belongs, ie to the metaclass. This is by no mean a
use case for classmethods.




From gherron at islandtraining.com  Sun May 11 19:50:17 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 16:50:17 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <48275A1F.5080606@bc90021.net>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>	<m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<48275955.4000106@islandtraining.com>
	<48275A1F.5080606@bc90021.net>
Message-ID: <48278639.9090701@islandtraining.com>

bc90021 wrote:
> You are a perfect example of exactly what I was talking about, and why 
> the Python community is such a poor one.

I though you were treated quite fairly all things considered.   (You 
started the personal attacks, the whining about the group, the 
accusations of arrogance, and the refusal to believe we all *knew* the 
error was in your file name calculation and not in Python threads.)

This group is widely acknowledged as one of the more friendly groups 
around,  and in fact we keep it that way by coming down rather hard on 
those who abuse either the members of the group or the purpose of the 
group.  And you've done both and been reprimanded for it.   Now, either 
go away, or change your attitude and join the group. (You would be 
welcome if the attitude changed.)  Either way, this group will be it's 
usual friendly self.


Gary Herron



>
> Gary Herron wrote:
>> bc90021 wrote:
>>>> ...and the exact error message was?
>>>>
>>>> Here is a tip: if you want people to help you, then you have to help
>>>> them to help you.  Personally, I wouldn't respond to anymore of your
>>>> questions because you seem incapable of posting the information 
>>>> that was
>>>> requested.
>>>>     
>>>
>>> So far, the people who have answered this post have gone on the 
>>> assumption that I'm stupid.  I'm not.  I took perfectly working 
>>> code, cut it from one class, and put it in another.  It stopped 
>>> working in the second class.  I've spent days on this and trust me, 
>>> given what I've experienced of the Python community so far, if I 
>>> didn't have to ask, I wouldn't.
>>>
>>> (I really must say that so far the help I am getting in the Python 
>>> community is a big let down.  Whether it's on IRC or here, everyone 
>>> has an arrogance that I don't find anywhere else in the open source 
>>> community, and it seriously makes me question the choice of language 
>>> that I've made.)
>>>   
>>
>> Sorry, the arrogance is yours.
>>    Expecting us to help with only partial information.
>>
>>    Expecting us to help when your posts of the error message changes 
>> from one post to the next.
>>
>>    Expecting us to help when you refuse to post the traceback.
>>
>>    Expecting us to believe that it has anything to do with threads.  
>> (No one believes that for a moment.)
>>
>>
>> While acknowledging that any piece of code may have bugs, Python's 
>> threading included, the problem here looks to be some simple mistake 
>> in the computation of the name of the file to be opened.   Then I 
>> look at the convoluted quoting surrounding your computation of the 
>> file name, and my confidence in that as an explanation sky-rockets.  
>> Then someone in another post has found an extra set of quotes 
>> embedded in your filename you compute, and it's clear that we are on 
>> the right track.
>>
>>
>>
>>> The error message was at the top of the thread (am I incapable of 
>>> posting it, or are you incapable of following a thread?), but here 
>>> it is again:
>>>
>>> IOError: [Errno 2] no such file u'tempfileName'
>>>
>>> -- 
>>> http://mail.python.org/mailman/listinfo/python-list
>>>   
>>
>>
>>
>



From castironpi at gmail.com  Sat May 10 07:53:52 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 04:53:52 -0700 (PDT)
Subject: Pythonicity of some algorithms
References: <mailman.898.1210413757.12834.python-list@python.org> 
	<4825770e$0$25961$9b622d9e@news.freenet.de>
Message-ID: <47927ab3-186e-4a9f-901d-3d15b69c165b@b64g2000hsa.googlegroups.com>

On May 10, 5:21?am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > This works for me. But I'd like to know if this is considered
> > Pythonic, and if there are other, better ways of doing the above in
> > Python.
>
> From the Python point of view, it's fine. However, it uses busy-wait,
> which I consider bad style (in any language).
>
> > 3) Make a custom thread-safe queue class, with an 'interrupt_get'
> > method. When your app calls queue.interrupt_get(), all threads
> > currently locking on a queue.get() will continue, but with a
> > GetInterrupted exception thrown.
>
> That's what I would do. I'd use the existing Queue class as a base
> class, though, rather than starting from scratch.
>
> Regards,
> Martin

Did you follow the links to Dev-C++?  It rules house.  I have
drizzle.c compiling in Windows GDI and SDL.  I'm poised to double-time
Dev-C++ and Windows GDI, if double-tasking is on the market.  Credit
up... what's standard?


From george.maggessy at gmail.com  Thu May 22 20:48:57 2008
From: george.maggessy at gmail.com (George Maggessy)
Date: Thu, 22 May 2008 17:48:57 -0700 (PDT)
Subject: MVC
Message-ID: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>

Hi Gurus,

I'm a Java developer and I'm trying to shift my mindset to start
programming python. So, my first exercise is to build a website.
However I'm always falling back into MVC pattern. I know it's a
standard, but the implementation language affects the use of design
patter. So, here goes my question. Is that OK if I follow this? Should
I create DAOs, View Objects, Controllers and etc? Is there any sort of
best practice / standard to Python?

Cheers,
George


From rpdooling at gmail.com  Tue May 13 20:58:59 2008
From: rpdooling at gmail.com (Rick Dooling)
Date: Tue, 13 May 2008 17:58:59 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
Message-ID: <3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com>

On May 13, 7:29 pm, Con <conra... at gmail.com> wrote:
> Hi, how does properly install the Python MySQL db module for Mac OS
> X?  I was only able to locate the Win32 modules.
>
> Thanks in advance,
>
> -Conrad

I tried this a couple of weeks ago using macports and had problems.

See, for example:

http://www.davidcramer.net/code/57/mysqldb-on-leopard.html

I read about several people who went in and edited the source files to
work out the bugs on Leopard, but instead I just changed my Python
code to use SQLite for the moment until someone fixes MySQLdb. There's
a nice Perl script that will convert your MySQL db to an SQLite db if
you're interested.

RD


From eduardo.padoan at gmail.com  Tue May 20 19:56:59 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Tue, 20 May 2008 20:56:59 -0300
Subject: What is wrong with my Python threading?
In-Reply-To: <op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
	<op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <dea92f560805201656v2417eaf3s3e3ef4a13bfeec6b@mail.gmail.com>

On Tue, May 20, 2008 at 8:24 PM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 20 May 2008 10:28:51 -0300, castironpi <castironpi at gmail.com>
> escribi?:
>
>> You meant 'thd1.start( )' and 'thd2.start( )'.
>
> Wow! A message with a high S/N ratio coming from you!
> And it's not the first I've seen - whatever pills you're taking, they're
> good for you...

This is why I shouldn't be so eager adding people to the killfile.


-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt

From gagsl-py2 at yahoo.com.ar  Wed May 14 02:26:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 03:26:41 -0300
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
	<mailman.1039.1210675135.12834.python-list@python.org>
	<bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
	<482A286B.3090504@al.com.au>
Message-ID: <op.ua4r6rumx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 20:46:51 -0300, Astan Chee <stanc at al.com.au> escribi?:

> Sorry, I mean functions not classes. Well, actually, one is a class and
> another is a function. So when the script (its a free game btw) runs, it
> instantiates the first class and somewhere in the middle of processing
> the first class, I need to call a function as a separate thread, I also
> want to wait for the function to complete and I was wondering how python
> handles the thread of this function? Does it die when the function
> completes? Anyway, I know it sounds silly to have 2 threads when I can
> do it with one, but Im using wx to render opengl objects using pygame.
> So it has to be a separate thread, otherwise wx wont play nice. Is there
> a simple example of how I can do this?

That's why I asked about the GUI library used. For wx see  
http://wiki.wxpython.org/LongRunningTasks

-- 
Gabriel Genellina



From google at mrabarnett.plus.com  Wed May 21 21:49:37 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 18:49:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com> 
	<afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com>
Message-ID: <12071a08-5c5d-4541-bc34-ed1f1ac4e96f@8g2000hse.googlegroups.com>

On May 21, 8:34 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 1:14 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
>
> > I wonder whether "is" could be used both for "x is value" and "x is a
> > type" without causing a problem:
>
> > If command is a string ...
>
> > If command is "quit" ...
>
> I think you are right.  I like "If command is "quit" ...".  For a user
> who wasn't mathemetically inclined and was doing mainly string
> manipulation, I think it might be easier to read than the equivalent
> "If command = "quit" ...".  By making them exactly equivalent, I can't
> think of any confusion that might induce bugs.  If you think of any
> drawbacks, please let me know.
>
I've thought of one possible drawback: "a" and "an" can be used as
variables, so the "is a" part might cause a problem. You'd need to
check the parser to find out...

> Otherwise, I'll put it in the next
> time I update the parser (probably this weekend).  Thank you again for
> your suggestions.



From bronger at physik.rwth-aachen.de  Thu May  1 01:12:41 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 07:12:41 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
Message-ID: <87iqxyboae.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

> On Apr 30, 9:11 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Sam <landofdre... at gmail.com> writes:
>> > I also have a problem with relative import; I can't for the life of me
>> > figure out how to use the damn thing. I think the main problem is with
>> > getting Python to recognize the existence of a package. I have
>>
>> > S/
>> >   p.py
>> >   B/
>> >     b.py
>> >   W/
>> >     pyw/
>> >       u.py
>> >       ws.py
>>
>> > and I'd like to get u.py to import all the other 3 programs. I put
>> > empty __init__.py files in all of the above directories (is this
>> > necessary?), and even manually added the pathway (r'C:\Myname\S') to
>> > sys.path, but when I execute
>>
>> > from S import p
>>
>> > in u.py Python gives "ImportError: No module named S".
>>
>> A silly question: is the directory that contains "S" in PYTHONPATH or
>> in sys.path?
>
> It's in sys.path.

"S" or its parent directory?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From hat at se-162.se.wtb.tue.nl  Tue May  6 12:10:01 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 18:10:01 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <slrng210mp.cfa.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, jmDesktop <needin4mation at gmail.com> wrote:
>
> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too.  On the dynamic typing,

I don't understand your reasoning. What part does 'this' refer to?
Also, you are wrong.
We teach 2nd year Bachelor students about programming (the process of solving a
problem by making a computer program, which is not the same as coding) with
Python.

> isn't that the same sort of thing that lots of scripting languages
> do?  VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in

VB was not designed well in that case.

I believe that VB is popular becomes it comes from the same firm that also
sells the OS and the word processor of all school computers. Also, many
teachers make a choice based on what others do or what they know,
rather than what the best possible prog language is for students.

Also, industry wants to have graduates that know the language they use.
It is very easy to give in to that desire, although it is not very useful,
since industry changes its programming language every so many years.


> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  Thanks.

That's normal (and healthy, probably).

The thing that should really scare you however is your idea that everything
done in the Java/C# way does make sense (ie you are trying to push Python in
the 'yet another hammer' concept rather than treating it as a shiny newly
invented tool used by many others already).

Unlike what you think, all languages including Java and C# have their
weaknesses. However, you can only see weak points from outside the Java/C#
world (by knowing other languages that handle the same problems in a better
way).


(sorry if I offended you with the last bit, I did not intend to attack you
personally, just trying to provoke you enough to make you wonder about your
implicit assumptions.)

Sincerely,
Albert



From daveparker at flamingthunder.com  Tue May 13 11:24:35 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 08:24:35 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>

>  The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.

Perhaps.  Flaming Thunder is only $19.95 per year for an individual
(and even less per individual for site licenses), which is less than
the cost of just one book on Python.

I think that many people will find that Flaming Thunder is easier to
use and understand than Python -- so for many people the amount of
time they save will be worth more than the cost of Flaming Thunder
(unless, of course, their time is worth $0).

Also, several users have rewritten their Python programs in Flaming
Thunder, and found that Flaming Thunder was 5 to 10 times faster
(Flaming Thunder compiles to native executables).  So again, since
many people value their time at more than $0, I think that many people
will find that Flaming Thunder is worth $19.95 per year.

Plus, me getting paid to work on Flaming Thunder is far more
motivating than me not getting paid to work on Python.  This weekend,
Python users will still be debating how to fix awkwardnesses in the
languages (such as FOR loops where you're just counting the loops and
not referencing the loop variable) -- but Flaming Thunder users will
be getting work done using the REPEAT n TIMES constructs that I'll be
implementing.

Python has been around about 15 years, yet still has those
awkwardnesses.  Flaming Thunder has been out less than 6 months and
those awkwardnesses are already getting fixed.  The difference: I
can't afford to ignore users.

But the future is one of the hardest things to predict, so we'll see.

On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
> On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > Don't let yourself be irritated by castironpi
>
> > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > interaction.
>
> > Not this interaction, I'm afraid. ?What irritates *me* about
> > castironpi is that he uses a chatterbot to clutter up the threads
> > here. ?If you go back to his postings from a year ago (and selected
> > ones since), his comments are coherent and sensible. ?These rambling
> > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > his idea of a joke. ?But they are certainly not worth your time in
> > trying to respond to them.
>
> > -- Paul
>
> ?I don't think castironpi so annoying that I should filter its
> messages. It would be enough if he were better tuned. He is much
> smarter than the emacs shrink, for example. :-P
>
> ?The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.- Hide quoted text -
>
> - Show quoted text -



From bearophileHUGS at lycos.com  Thu May 15 13:46:30 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Thu, 15 May 2008 10:46:30 -0700 (PDT)
Subject: Fast Mersenne Twister
Message-ID: <8750298b-b4c9-4089-b01c-d00f2453ee69@k13g2000hse.googlegroups.com>

This may be interesting for Python developers of the random module,
"SIMD-oriented Fast Mersenne Twister (SFMT): twice faster than
Mersenne Twister":

http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/

One function may be useful to generate integers (randint, randrange,
choice, shuffle, etc), the other for floating point values (random)
faster than the current Mersenne Twister used in the random module.

Bye,
bearophile


From iainking at gmail.com  Fri May 23 04:24:39 2008
From: iainking at gmail.com (Iain King)
Date: Fri, 23 May 2008 01:24:39 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com> 
	<mailman.1493.1211510178.12834.python-list@python.org>
Message-ID: <e47233a9-83af-4042-ac86-c609a5de9bef@e53g2000hsa.googlegroups.com>

On May 23, 3:35 am, Charles Hixson <charleshi... at earthlink.net> wrote:
> On Thursday 22 May 2008 13:30:07 Nick Craig-Wood wrote:
>
> > ...
> > >From Armstrong's book: The expression Pattern = Expression causes
>
> > Expression to be evaluated and the result matched against Pattern. The
> > match either succeeds or fails. If the match succeeds any variables
> > occurring in Pattern become bound.
>
> > It is a very powerful idea and one which (along with the concurrency
> > and message passing from Erlang) has been implemented for python :-
>
> >  http://candygram.sourceforge.net/
>
> > I've been reading the Erlang book and I have to say it has given me a
> > lot of insight into python...
>
> Although when comparing Candygram with Erlang it's worth noting that Candygram
> is bound to one processor, where Erlang can operate on multiple processors.
> (I'd been planning on using Candygram for a project at one point, but this
> made it unusable.)

lol, nice name.  Also surprisingly relevant to the thread:

candygrammar: n.

    A programming-language grammar that is mostly syntactic sugar; the
term is also a play on ?candygram?. COBOL, Apple's Hypertalk language,
and a lot of the so-called ?4GL? database languages share this
property. The usual intent of such designs is that they be as English-
like as possible, on the theory that they will then be easier for
unskilled people to program. This intention comes to grief on the
reality that syntax isn't what makes programming hard; it's the mental
effort and organization required to specify an algorithm precisely
that costs. Thus the invariable result is that ?candygrammar?
languages are just as difficult to program in as terser ones, and far
more painful for the experienced hacker.


From detlev at die-offenbachs.de  Sun May  4 04:58:29 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 04 May 2008 10:58:29 +0200
Subject: ANN: eric 4.1.3 released
Message-ID: <fvjtrl$hkn$3@online.de>

Hi,

I'd like to inform everybody about the immediate availability of eric
v4.1.3. This is a bug fix release.

It is available via http://www.die-offenbachs.de/eric/index.html.

What is eric?
-------------
eric is a Python IDE written using PyQt4 and QScintilla2. It comes with
all batteries included. For details please see the above link.

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From zentraders at gmail.com  Mon May 26 14:50:43 2008
From: zentraders at gmail.com (Zentrader)
Date: Mon, 26 May 2008 11:50:43 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c91fd23b-1f39-445c-be15-acd2edea0524@p25g2000pri.googlegroups.com>

On May 26, 11:34 am, notnorweg... at yahoo.se wrote:
> what is the definition of a highlevel-language?

It is relative.  A low-level language is lower/closer to the
computer's binary code.  C/C++ is a high-level language compared to
assembly.  Python is high-level vs. C/C++.  Python is low-level
compared to "spreadsheet programming", although some spreadsheets like
Gnumeric can use Python extensions.


From wuwei23 at gmail.com  Fri May 23 22:00:20 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:00:20 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <d8818486-b89c-4faf-8000-5b0ec740d053@w34g2000prm.googlegroups.com>

On May 24, 7:14 am, nayden <nay... at gmail.com> wrote:
> the execution fails just after the print statement, and I am not quite
> sure why is that.

It's often helpful to include the traceback, or at the very least the
last 3-4 lines of it, as it helps everyone work out the issue you're
having.

If you're not sure which line in a function is causing the issue, try
commenting out all but the first, run-and-test, re-add the next, run-
and-test etc

But the error is most likely this line:
>     i = cPickle.load(str)

cPickle.load unpickles from a file, but here you're handing it a
string. You want cPickle.loads.

At the interpreter, you can always quickly check these out by looking
up the docstring via 'help(cPickle.loads)' (or 'cPickle.loads?' if
you're using iPythhon).

- alex23


From benjamin.kaplan at case.edu  Fri May 30 18:49:14 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 30 May 2008 18:49:14 -0400
Subject: SMS sending and receiving from website?
In-Reply-To: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
Message-ID: <ec96e1390805301549j71a738efhc991bae0f4fae33e@mail.gmail.com>

On Fri, May 30, 2008 at 5:08 PM, globalrev <skanemupp at yahoo.se> wrote:

> can i send and receive messages from a website using python?
>
> how would that work with costs? would the mobileowner pay both ways?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I believe that there is a way to use Django to send messages, but I've never
used it myself and I don't know about recieving messages.
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From rsoh.woodhouse at googlemail.com  Wed May 28 17:19:40 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 14:19:40 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
Message-ID: <b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>

On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> rsoh.woodho... at googlemail.com schrieb:
>
> >>> Hi,
> >>> I'm trying to work out some strange (to me) behaviour that I see when
> >>> running a python script in two different ways (I've inherited some
> >>> code that needs to be maintained and integrated with another lump of
> >>> code). The sample script is:
> >>> # Sample script, simply create a new thread and run a
> >>> # regular expression match in it.
> >>> import re
> >>> import threading
> >>> class TestThread(threading.Thread):
> >>>     def run(self):
> >>>         print('start')
> >>>         try:
> >>>             re.search('mmm', 'mmmm')
> >>>         except Exception, e:
> >>>             print e
> >>>         print('finish')
> >>> tmpThread = TestThread()
> >>> tmpThread.start()
> >>> tmpThread.join()
> >>> import time
> >>> for i in range(10):
> >>>     time.sleep(0.5)
> >>>     print i
> >>> # end of sample script
> >>> Now if I run this using:
> >>> $ python ThreadTest.py
> >>> then it behaves as expected, ie an output like:
> >>> start
> >>> finish
> >>> 0
> >>> 1
> >>> 2
> >>> ...
> >>> But if I run it as follows (how the inherited code was started):
> >>> $ python -c "import TestThread"
> >>> then I just get:
> >>> start
> >>> I know how to get around the problem but could someone with more
> >>> knowledge of how python works explain why this is the case?
> >> Works for me. And I don't see any reason why it shouldn't for you -
> >> unless you didn't show us the actual code.
>
> >> Diez
>
> > Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> > on Ubuntu 7.10. Which version of python/what platform were you using?
>
> mac-dir:/tmp deets$ python
> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> Welcome to rlcompleter2 0.96
> for nice experiences hit <tab> multiple times
>  >>>
>
> But I doubt this changes anything.
>
> Diez

Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
Python 2.4.5 on Debian and get the same results as I had before.

Thanks,
Rowan


From tinnews at isbd.co.uk  Fri May 23 14:59:39 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 23 May 2008 18:59:39 GMT
Subject: Python database 'frontends', what's available?
Message-ID: <4837141b$0$658$bed64819@news.gradwell.net>

I'm desperately trying to move a Microsoft Access database application
(a simple accounts system I wrote myself) to Linux.  Python is one of
my preferred programming laguages so I wonder if there are any good
Python 'frameworks' for writing database applications, in particular I
need good reporting and forms writing facilities.  The basic database
and logic/arithmetic seem fairly simple to me.

-- 
Chris Green


From bignose+hates-spam at benfinney.id.au  Tue May 27 19:04:52 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 28 May 2008 09:04:52 +1000
Subject: When was feature FOO added to Python? (was: decorators when?)
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <87zlqbs60b.fsf@benfinney.id.au>

David C. Ullrich <dullrich at sprynet.com> writes:

> What version added decorators (using the @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)

For standard library features, the documentation for a module
<URL:http://www.python.org/doc/lib/> usually says "(New in 2.4)" or
"(Changed in 2.4)" or the like for features that appeared in a
particular version. I think this is manually done by the
documentation maintainers, though.

For features of the language (like decorators), the language reference
<URL:http://www.python.org/doc/ref/> is the place that *describes* the
features; but I don't see any similar "(New in 2.4)" annotations, so
e.g. <URL:http://www.python.org/doc/ref/function.html> doesn't mention
when the decorator syntax appeared in the language.

Any documentation maintainers reading: Please consider updating the
documents to give this useful "(New in 2.x)" or "(Changed in 2.x)"
annotation for just such a situation.

You can get closer to the answer by browsing the "What's New in
Python" <URL:http://www.python.org/doc/2.4/whatsnew/> documents by
version.


From lists at cheimes.de  Thu May 29 10:31:03 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 29 May 2008 16:31:03 +0200
Subject: seg. fault with Py_BuildValue?
In-Reply-To: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <g1men7$c48$1@ger.gmane.org>

Christian Meesters schrieb:
> Hi
> 
> I'm having trouble with Py_BuildValue. I was able to pinpoint the following
> statement as the one causing a seg. fault with my script:
> 
> static PyObject * funcname(PyObject *self, PyObject *args) {
> ....
>   return Py_BuildValue("(OO)", x, y);
> }
> where x & y are both of type PyObject.
> 
> Any suggestions here? Do I need to handle the output of Py_BuildValue
> somehow before returning? How? Need to decref x & y before returning?

Check if either x or y are NULL.

Christian



From miller.paul.w at gmail.com  Mon May 26 15:22:24 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:22:24 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>

On May 26, 3:02?pm, notnorweg... at yahoo.se wrote:

> what is crazy about it?

To make, say, a Python machine fast, you'd have to optimize the hell
out of the architecture, probably all the way down to the microcode
level.  Thus, a hypothetical hardware-based Python machine would look
very little like other, more conventional chips like x86 or ARM, for
instance.  In fact, I suspect it'd look a lot like the CPython virtual
machine on an instruction level.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:03:05 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:03:05 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
Message-ID: <482c428c$0$9669$426a34cc@news.free.fr>

Arnaud Delobelle a ?crit :
> 
> bruno.desthuilliers at gmail.com wrote:
>> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
>>>> On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>>>> __new__ is a static method!
>>>> __new__ is a special-cased staticmethod that  1/ must not be declared
>>>> as such and 2/ takes the class object as first args. As far as I'm
>>>> concerned, it's semantically a classmethod.
>>> It's a static method!
> 
> OK then let me reply pedantically:
> 
>> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
>> a staticmethod object. What I say is that
>> 1/ it's special-cased since you don't *explicitely* declare it as a
>> staticmethod
> 
> In some cases you have to:
> 
> class Foo(object): pass
> 
> # Later on I want to redefine Foo.__new__
> 
> @staticmethod
> def Foo__new__(cls):
>     print "new Foo!"
>     return object.__new__(cls)
> 
> Foo.__new__ = Foo__new__
> 
>>>> Foo()
> New Foo!
>>>> # Without the @staticmethod we would get a TypeError

Point taken. But you'll admit that monkeypatching the __new__ method is 
somewhat uncommon !-)

>> 2/ it behaves 

<nb>
Poor word choice here I'm afraid - of course a staticmethod doesn't 
"behave" like a classmethod object. But you of course __knew__ what I 
meant !-)
</nb>

>> just like a classmethod, since it takes the class as
>> first argument.
> 
> When you invoke it implicitely maybe, but not when you do so
> explicitely!

I'm not talking about how you invoke it (FWIW, direct invocation of 
__new__ is pretty rare, parent call excepted - and then, well, it mostly 
mirrors a direct parent call within an overridden instance method). It's 
about having __new__ taking the class as first argument.

FWIW, I wonder why the BDFL choosed to implement __new__ as a 
staticmethod - there are probably some pretty good reasons, but not 
knowing them, it looks like __new__ would have been a perfect candidate 
for a classmethod.

So far, the only reason I can think of is that making it a classmethod 
would have required the use of super(Parent, cls) to call the parent's 
class __new__, which may (or may not - never had the case) be 
problematic (any guru on this ?)

>> IOW, I'm talking about semantic, not implementation.
> 
> I understand what you mean, and from that point of view you can argue
> against my example above 

It's somehow difficult to argue against something that's just the plain 
and naked truth. My one and only argument is about __new__ being 
semantically close enough to a classmethod to wonder why it isn't one.

> (after all, my example is code, not pure
> concept) but for me it is simpler to think of __new__ as a
> staticmethod (which it is!), plain and simple.

I could by no mean hold it against you !-)


From jschroed at gmail.com  Thu May  8 12:53:36 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 09:53:36 -0700
Subject: Troubles with 'self'
In-Reply-To: <467304.16209.qm@web81401.mail.mud.yahoo.com>
References: <467304.16209.qm@web81401.mail.mud.yahoo.com>
Message-ID: <4878ad7b0805080953l30aec474s65ee9e6dfeed93a@mail.gmail.com>

I think you need to make an instance of your class.  Try this:

my_class_instance = DataAnalysis()
LogFile = my_class_instance.BasicSummary ( )

On Thu, May 8, 2008 at 7:07 AM, Richard Speaker <
richard.speaker at sbcglobal.net> wrote:

> I'm somewhat new to Python... and programming in general.  I know enough to
> be dangerous for sure. I have a feeling the solution to this is simple.  I'm
> having trouble getting 'self' to initialize or work in a class application.
> I keep getting the message:
>
>     LogFile = self.BasicSummary ( )
> NameError: name 'self' is not defined
>
> Code looks like this:
>
> from data_decode import *
> class DataAnalysis:
>
>         def PainInTheArse ( self , i , InvI ):
>                 """This is a filter I made to overcome
>                 some problems I was having with sine wave
>                 analysis"""
>                 TemporaryData = [ ]
>                 for a in range ( int ( InvI [ i ] ) , len ( InvI ) ):
>                         if a < 0:
>                                 a = 0
>                         b = a + 1
>                         try:
>                                 TemporaryData.append ( InvI [ a + i ] )
>                                 if ( InvI [ b + i ] < 0 and InvI [ b + i +
> 1 ] > 0 ):
>                                         TemporaryData.append ( InvI [ a + i
> + 1 ] )
>                                         break
>                         except IndexError:
>                                 continue
>                 return TemporaryData
>         def GetTheInvIData ( self , InvI ):
>                 """"Function determines zero-crossing, and then
>                 calculates the +/- peaks to get an average """
>                 CurrentMaxList = [ ]
>                 CurrentMinList = [ ]
>                 for i in range ( 0 , len ( InvI ) ):
>                         try:
>                                 if ( InvI [ i ] <= 0 and InvI [ i + 1 ] > 0
> ):
>                                         TemporaryData = self. PainInTheArse
> ( i , InvI )
>                                         BetterData = self.FilterTheBS (
> TemporaryData )
>                                         CurrentMaxList.append ( max (
> BetterData ) )
>                                         CurrentMinList.append ( min (
> BetterData ) )
>                         except IndexError:
>                                 continue
>                 MeanCurrentMax = sum ( CurrentMaxList ) / len (
> CurrentMaxList )
>                 MeanCurrentMin = sum ( CurrentMinList ) / len (
> CurrentMinList )
>                 InvIPeakToPeak = MeanCurrentMax - MeanCurrentMin
>                 EstPeak = InvIPeakToPeak / 2
>                 return EstPeak
>
>         def FilterTheBS ( self , TemporaryData ):
>                 """This is another filter I made to overcome
>                 some problems I was having with sine wave
>                 analysis"""
>                 BetterData = [ ]
>                 UselessData = [ ]
>                 for i in range ( 0 , len ( TemporaryData ) ):
>                         try:
>                                 if TemporaryData [ i ] == TemporaryData [ i
> + 1 ]:
>                                         UselessData.append ( TemporaryData
> [ i ] )
>                                 else:
>                                         BetterData.append ( TemporaryData [
> i ] )
>                         except IndexError:
>                                 BetterData.append ( TemporaryData [ i ] )
>                                 continue
>                 return BetterData
>         def BasicSummary ( self ):
>
>                 DDC = DecodeData( )
>                 try:
>                         MeanCurrent_A = float ( ( self.GetTheInvIData (
> DDC.InvIa ) ) )
>                         MeanCurrent_B = float ( ( self.GetTheInvIData (
> DDC.InvIb ) ) )
>                         MeanCurrent_C = float ( ( self.GetTheInvIData (
> DDC.InvIc ) ) )
>   except ValueError:
>    print'KaFlewie!'
>                 LogFile = []
>                 LogFile.append ('DEVICE CURRENT SUMMARY:\n')
>                 LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % (
> MeanCurrent_A ) )
>                 LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % (
> MeanCurrent_B ) )
>
>                 return LogFile
>
>         LogFile = self.BasicSummary ( )
>         for a in LogFile:
>   print a
>
>
> any and all advice is welcome
>
> Rick
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From cwitts at gmail.com  Wed May 28 07:16:57 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 04:16:57 -0700 (PDT)
Subject: A quick question
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <fa237962-e58a-4615-ac6f-9974f9c39352@m36g2000hse.googlegroups.com>

On May 28, 12:25?pm, "James" <cobro... at msn.com> wrote:
> Hey everyone,
>
> I just started using python and cant figure this out, I'm trying to
> make a program where someone types in a word and the program gives it
> back backwards. ?For example if the person puts in "cat" I want the
> program to give it back as "tac" and what it does is prints out 3,2,1. ?
> How can I get these integers to print as letters? ?This is what I have,
>
> word = raw_input("Type a word:")
> start = len(word)
>
> for letter in range(start, 0, -1):
> ? ? print letter ?

word = raw_input("Type a word:")
print 'Reversed : %s' % word[::-1]


From jschroed at gmail.com  Thu May  8 12:48:15 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 09:48:15 -0700
Subject: Given a string - execute a function by the same name
In-Reply-To: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.291.1209400412.12834.python-list@python.org>
	<jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <4878ad7b0805080948q36b97c05j713de0e6c010ad84@mail.gmail.com>

You can do it with a class using the __getattr__ function.  There might be a
way to do it without a class but I don't how to do it that way.

class AllMyFunctions(object):
    def a(self):
        print "Hello.  I am a."

    def b(self):
        print "Hey.  I'm b."

x = raw_input("Enter a function to call: ")
if x not in AllMyFunctions().__dict__:
    print "That's not a function that I have."
else:
    getattr(AllMyFunctions(), x)()

On Thu, May 8, 2008 at 9:33 AM, Andrew Koenig <ark at acm.org> wrote:

> <python at bdurham.com> wrote in message
> news:mailman.291.1209400412.12834.python-list at python.org...
>
> > I'm parsing a simple file and given a line's keyword, would like to call
> > the equivalently named function.
>
> No, actually, you woudn't :-)  Doing so means that if your programs input
> specification ever changes, you have to rename all of the relevant
> functions.  Moreover, it leaves open the possibility that you might wind up
> calling a function you didn't intend.
>
> The right way to solve this kind of problem is to list all the functions
> you
> wish to be able to call in this way, and then explicitly define a mapping
> from keywords to the appropriate functions.  Which is exactly what you're
> doing in
>
> > 3. Place all my functions in dictionary and lookup the function to be
> > called
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From castironpi at gmail.com  Tue May 20 10:07:57 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 07:07:57 -0700 (PDT)
Subject: persistent deque
Message-ID: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>

I'd like a persistent deque, such that the instance operations all
commit atomicly to file system.


From tjreedy at udel.edu  Tue May 20 14:09:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 14:09:31 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com><mailman.1361.1211228890.12834.python-list@python.org><4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com><8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com><3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com><20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <g0v44p$loj$1@ger.gmane.org>


"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9AA470833CCA8duncanbooth at 127.0.0.1...
| In short, two equal strings may or may not be identical and any code 
which
| makes assumptions based on observed behaviour is broken. If you want to 
be
| able to test identity on strings safely then use the 'intern()' builtin 
to
| get repeatable behaviour.

Intern() is gone in 3.0 





From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:07:40 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:07:40 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4831516b$0$24599$426a74cc@news.free.fr>

John Salerno a ?crit :
> Hey all. Just thought I'd ask a general question for my own interest.
> Every time I think of something I might do in Python, it usually
> involves creating a GUI interface, so I was wondering what kind of
> work you all do with Python that does *not* involve any GUI work.
> This could be any little scripts you write for your own benefit, or
> what you do at work, if you feel like talking about that! :)

web apps, command line utilities, and of course libraries.



From arnodel at googlemail.com  Mon May 26 04:06:46 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 09:06:46 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
Message-ID: <m2hccl5w15.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> pball.benetech at gmail.com writes:
>
>> On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
>>> > We can use any operation or function which
>>> > takes and returns sets.
>>>
>>> I think the problem is significantly underspecified. It would be a more
>>> interesting problem if there was a restriction to a few selected set
>>> operations, e.g. union, intersection, difference, and combinations
>>> thereof.
>>
>> Ok, that's quite right -- when I just tried to define "any function,"
>> I found that all the solutions I came up with were combinations of the
>> set operations defined for immutable sets. Let me improve the spec as
>> the following:
>>
>> There may be arbitrarily many set elements (denoted by integers
>> 1,2,3,...), arbitrarily many combinations of the elements composing
>> the sets s_i (s0, s1, ...). We can use any of python's set operations
>> or combination of those operations.
>
> OK then, if you only allow union, intersection, difference, symmetric
> difference then I think it would be easy to prove (I haven't done it!)
> that if there is a solution to you problem, then the method below
> yields a solution:
>
> *** warning: all this is untested AND written in a rush ***
>
> let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
>
>
> # X is the "domain", C is the set of complements in X of elements of S
>
> X = reduce(set.union, S)
> C = set(X - s for s in S)
>
>
> # Find the "fibers" at each element x of s0.  A fiber at x is the set
> # of all s in S or C that contain x
>
> from collections import defaultdict
> fibers = defaultdict(list)
>
> for s in S | C:
>     for x in s & s0:
>         fibers[x].append(s)
>
>
> # Find the "seeds" at each x in s0.  A seed at x is the set of all
> # elements contained in all s in the fiber at x.
>
> # Intutively, a seed at x is the smallest set containing x that can be
> # built from S
>
> seeds = [reduce(set.intersection, F) for F in fibers.itervalues()]
>
>
> # Now we know if there is a solution:
>
> sol = reduce(set.union, seeds)
>
> if sol != s0:
>     print "No solution"
> else:
>     print "Solution: union(intersection(fibers[x]) for x in s0)"
>
>
> I think this solution will be found in O(m*n**2) time, where:
>
> * n is the size of X (i.e. the total number of elements)
> * m is the size of S (i.e. the total number of sets)
>
> and assuming that set operations are linear.

I forgot to add, using reduce() is probably not a great idea but it
allowed me to write down my idea quickly!

-- 
Arnaud


From castironpi at gmail.com  Sun May 11 04:09:21 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 01:09:21 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<7xabix2yds.fsf@ruckus.brouhaha.com>
Message-ID: <76cd3ea7-58e1-4167-a8b4-8108dc6e7bc1@z72g2000hsb.googlegroups.com>

On May 11, 12:38?am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> John Salerno <johnj... at NOSPAMgmail.com> writes:
> > for x in range(10):
> > ? ? #do something 10 times
>
> > is unPythonic. The reason I ask is because the structure of the for loop
> > seems to be for iterating through a sequence. It seems somewhat
> > artificial to use the for loop to do something a certain number of
> > times, like above.
>
> It is pretty natural in imperative-style code. ?The one thing I'd do
> differently is use xrange instead of range, to avoid creating a
> 10-element list in memory before starting the loop.

If you give extras to memory, can Python live?


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:44:34 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:44:34 -0300
Subject: python equivalent to perl's inplace edit mechanism
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <op.uat5okt3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:11:56 -0300, Michael Mabin <d3vvnull at gmail.com> escribi?:

> Does python have an equivalent to Perl's inplace-edit variable $^I?
> For example, the following perl code below changes mike to dave in a file
> that is passed as an argument.
>
> #!/usr/bin/env perl
> #chgit script
> $^I = '';
> while(<>) {
>   s/mike/dave/g;
>   print;
> }
>
> The script would be used as below:
> chgit somefile
>
> Afterward, all instances of mike are changed to dave.

Like this?

<code>
import sys,fileinput

for line in fileinput.input(inplace=True):
     sys.stdout.write(line.replace('mike','dave'))
</code>

Sample session:

C:\TEMP>type foo.txt
this line tells about mike and john
this second line says nothing
goodbye mike!

C:\TEMP>python chgit.py foo.txt

C:\TEMP>type foo.txt
this line tells about dave and john
this second line says nothing
goodbye dave!

-- 
Gabriel Genellina



From Lie.1296 at gmail.com  Tue May 13 10:20:14 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 07:20:14 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au> 
	<482912b7$0$11641$607ed4bc@cv.net>
Message-ID: <f9e593e2-7b11-4e8f-a604-fbc386cef448@l17g2000pri.googlegroups.com>

On May 13, 11:01?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Ben Finney wrote:
> > I think that the idiom
>
> > ? ? for unused in xrange(10):
> > ? ? ? ? # do stuff with no reference to 'unused'
>
> > is quite common. Is that what you're asking about?
>
> Yes. I was more or less asking about the specific situation of using a
> for loop to do something X number of times, but I think the more
> generalized problem that everyone is talking about -- using a counter
> variable that is never referenced in the loop -- probably puts the point
> I was trying to make in a better light.
>
> The reason I even brought this up is because I remember someone saying a
> while back (probably here on the newsgroup) that the true use of a for
> loop was to iterate through a sequence (for the purpose of using that
> sequence), not to do something X number of times. Once they made this
> comment, I suddenly saw the for loop in a new (and I believe purer)
> light. That was the first time I realized what it was really meant
> to do.
>
> Using something like:
>
> for unused in xrange(10):
> ? ? # do stuff 10 times
>
> suddenly seemed to me like a hackish way to replace
>
> for (int i=0; i<10; i++) {
> ? ? // do stuff 10 times;
>
> }
>
> Not that I think the above code (C#) looks all that elegant either. But
> in C# there is a distinction between the above, and this:
>
> foreach (int i in sequence)
> ? ? // do something;
>
> which is more closely related to the Python for loop.
>
> Now, you could easily make the argument that the Python for loop is a
> much simpler tool to accomplish *both* of the above, and I suppose that
> makes sense. Seems a little silly to have two separate for loops to do
> these things. I just wasn't sure if the "counter" version of the Python
> for loop was considered slightly unpythonic.

What was unPythonic, I think, as most people would agree, is to use
for like this:

 --
    for i in xrange(len(lst)):
        pass
 --

In VB, my language before Python, I've never used For Each even for a
sequence (Array, in VB), it seems too messy back then. Now, with
Python that only allowed a foreach statement, I realized that I never
really needed a for i in range(10) at all. Most of the time the places
where I need to do that is where the code is just a test code that
loops a certain number of times (with randomized input data), almost
never (probably never) met that in a real program code. And even in
some of those cases, the variables are usually used too (as a test
argument to the function being tested) or for logging purpose.

On May 13, 8:25 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
(snip)
> I use it quite often, especially if I want to implement a fixed number of
> retries on a communications channel.
>
> -Larry

That still have semantic meaning: 'tries'. If it was me, I'll go to
the trouble of giving names, since I would use it for logging or
informational purpose ('first try' 'second try' 'third try' 'no more
try').

I've never really met a real "do something n times" case, where the
variable doesn't hold any semantic meaning that I don't want to use
and is not a test case.

For me, a _ (or any other dummy variable[1]) is good enough and it's
easy to change if later I realized that I actually need to use the
variable. I agree though, that i, j, k for unused name is a bad choice
because single letter names is in common usage in mathematics.

[1] PEP 8 is useless if a certain code base has other agreed
convention, as long as the name used for a unused name in certain code
base is consistent (and probably documented), it never becomes a
problem.


From daveparker at flamingthunder.com  Wed May 21 12:11:13 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 09:11:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
Message-ID: <7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>

On May 21, 10:00?am, "Dan Upton" <up... at virginia.edu> wrote:

> Sounds to me like the teacher is being difficult, ...

No, proof-by-contradiction is a common technique in math.  If you can
show that x=8 and x=10, then you have shown that your assumptions were
incorrect.

> If you can't do, or don't like, math, you probably shouldn't be
> programming.

Why not?  Recipes are programs.  I prefer to look at it the other way:
an easy-to-use programming language might encourage more people to
like math.

> You keep trotting out this quadratic equation example, but does FT
> actually have any kind of useful equation solver in it?

Not yet, but it will.  Probably around July.


From inhahe at gmail.com  Fri May 16 12:59:01 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:59:01 -0400
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <O1jXj.4901$Kk3.1265@bignews9.bellsouth.net>

I'm not sure it's possible to kill a thread in Python that's in the middle
of a C function.  I know you can't do it with signals, for example.  Or can
you?  I'm on Windows and signals isn't fully implemented.

I had to do just this, btw, so I wrote another Python program that
communicates with the main one over a socket and then if it misbehaves I can
kill it using an OS command because it's a process and there's an OS command
for killing processes, and then I'd restart it.  The problem is that,
sometimes the OS kill command would work, sometimes it wouldn't, and I never
did figure what makes the difference.



"Roger Heathcote" <usenet at technicalbloke.com> wrote in message
news:DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d at bt.com...
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing of
> threads is a cardinal sin and although I have no particular threading
> problem to crack right now I remain interest in the taboo that is thread
> killing. The real world and it's data are messy and imperfect and I can
> think of several scenarios where it could be useful to be able to bump off
> a naughty thread, especially when using/testing unstable 3rd party modules
> and other code that is an unknown quantity.
>
> With this in mind I am experimenting with a set of threading subclasses
> that would permit timeouts and the manual killing of threads. I'm trying
> to evaluate how robust such a scheme can be made and what the limitations
> would be in practice.
>
> So far I can seemingly murder/timeout pure python threads that are stuck
> blocking for input and stuck in infinite loops but I'm guessing there are
> many more awkward cases. What I'm looking for are examples of code/modules
> that can get stuck in dead ends or might otherwise be problematic to
> terminate.
>
> In particular I'd be interested to see if I could kill a non-returning c
> module. Of course naturally no one wants to be publishing buggy modules
> and the like so I am having trouble finding examples of misbehaving c code
> to explore further. I figure I could learn how to write c modules for
> python but, while it's something I'd like to know someday, I'm guessing
> that will be too long to fit into the immediate future :/ Consequently if
> anyone has detailed knowledge of what is and isn't fundamentally possible
> in the world of thread culling, or if you can point me to some
> gnarly/non-returning thread code to test with I would be forever grateful.
>
> Oh yes, I'm working primarily with 2.5 on XP however I have access to
> linux & OSX boxen and I'd be interested to learn about problematic thread
> code for either of those platforms as well.
>
> Thanks for reading,
>
> Roger Heathcote - www.technicalbloke.com





From mccredie at gmail.com  Wed May 28 21:08:35 2008
From: mccredie at gmail.com (Matimus)
Date: Wed, 28 May 2008 18:08:35 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <d5f3147d-ce9c-4dc9-a36c-508f22f85254@l64g2000hse.googlegroups.com>

> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486


I frequently use strings in place of enumeration in python. I have
found it to be very useful. I'm curious about the _many negatives_ you
have found?

For example, I wrote a module and one of the parameters to a function
was `mode`. Two of the modes were ALL_MODE and ONE_MODE.

At first I enumerated the modes:

MODES = ALL_MODE, ONE_MODE = 0, 1

And code using the mode tended to look something like this:

from package import module
module.foo(mode=module.ALL_MODE)

Of course, the following would also work, but isn't self descriptive:

module.foo(mode=0)

Then, after some user feedback I changed it to this:

MODES = ALL_MODE, ONE_MODE = "all one".split()

This maintained backwards compatabilty, but users could use the much
more concise (but still readable) version:

module.foo(mode="all")

Since then, I have adopted using strings in place of enum types as a
best practice.

Matt


From bj_666 at gmx.net  Sat May  3 02:16:13 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 3 May 2008 06:16:13 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de> <m21w4kbm4l.fsf@googlemail.com>
Message-ID: <682e9cF2qodffU1@mid.uni-berlin.de>

On Fri, 02 May 2008 19:23:54 +0100, Arnaud Delobelle wrote:

> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
> 
>>
>> There are no modern processors with an opcode for incrementing a memory
>> location!?  At least my C64 can do that.  ;-)
> 
> Indeed!  I remember a simple use was to make the border change colour
> very fast, a v. cool effect when you're 12!
>  
>         CLV
> LOOP:   INC $D020
>         BVC LOOP
> 
> (from memory, untested!)

That works but I think

LOOP:	INC $D020
	JMP LOOP

is a bit more straight forward.  Shorter in opcodes, equal in bytes, the
loop is as fast but you save the two cycles of the CLV.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From paddy3118 at googlemail.com  Wed May 21 01:39:30 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 22:39:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <451986c6-ba24-4060-917b-97fedcba13d7@x35g2000hsb.googlegroups.com>

On May 17, 11:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.

Using Python doesn't mean you give up on C! Many of the best
algorithms written in other languages such as C, C++ and Fortran are
pre-wrapped in Python or can be wrapped in a Python interface to
enhance usability, without having to pay Matlab-type prices. You then
make your resulting work easier to reproduce by lowering the cost to
other researchers.

Python is a scripting language. Despite what some may think, it is a
boon, as it means that Pythons designers value its ability to work
well with other languages and systems.

Nothing stops you from exploring algorithm space in Python then re-
implementing in a language closer to assembler - and this may well be
the quicker way to your goal.

- Paddy.





From gandalf at shopzeus.com  Fri May 16 07:33:04 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 13:33:04 +0200
Subject: ply yacc lineno not working?
Message-ID: <482D70F0.9070202@shopzeus.com>

This is a fragment from my yacc file:


import ply.yacc as yacc
from lex import tokens
from ast import *

def p_msd(p):
    r"""msd : SCHEMA WORD LBRACE defs RBRACE """
    p[0] = MSDSchema(p[2])   
    print p.lineno(5) # Line number of the right brace
    p[0].items = p[4]


Here is a test input: """

schema TestSchema {
    field name : varchar { required; size 100; }
}

"""


My program prints out 1. No matter what I do, YaccProduction.lineno(n) 
returns 1 for every possible n between 0 and 5. What am I doing wrong? 
Can it be a problem if I use this in my lexer:

# Whitespace is mostly ignored, except inside quoted words.
def t_ws(t):
    r'[\n\r\t ]+'
    # We do not return anything so this will be ignored.


If so, how can I easily ignore newlines while preserving the line number 
for yacc.parse ?

Thanks,

   Laszlo



From deets at nospam.web.de  Thu May  1 11:18:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 May 2008 17:18:47 +0200
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <67u5aqF2qfrq9U1@mid.uni-berlin.de>

AlFire schrieb:
> Hi,
> 
> I have a piece of software which uses threads in very massive way - like 
> hundreds of  them generated every second.
> 
> there is also a piece of code which maintains the number of outstanding 
> threads, simply
> 
> counter+=1 is executed when before starting the thread and counter-=1 
> after it finishes.
> 
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
> 
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.
> 
> I guarded those statement with Lock.{acquire,release} and now it always 
> returns 0.
> 
> 
> But I still can not believe that +=1 is not a thread safe operation.

don't confuse augmented assignment with incrementation as it is offered 
by C (if your data-type actually fits into a single addressable memory 
spot, that is)

python's += works like this


a += b  <=> a = a.__iadd__(b)

Thus you actually get a situation where the expression on the right is 
evaluated but not yet assigned - and then another thread can take over 
control, computing  with the old value of a.

Diez


From george.sakkis at gmail.com  Tue May 27 15:16:41 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 27 May 2008 12:16:41 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net> 
	<6382bf6f-3478-4a88-8f43-3b38c20d3b85@l64g2000hse.googlegroups.com>
Message-ID: <3c7d20b4-50ee-4397-b3ba-3f22245b1420@x41g2000hsb.googlegroups.com>

On May 27, 3:43 am, Paddy <paddy3... at googlemail.com> wrote:
> On May 27, 7:42 am, "inhahe" <inh... at gmail.com> wrote:
>
> > Well, I just need it once in a while.  Actually now is the only time I
> > remember.  The last time what I needed was a file name extension.  I want a
> > string called headers, but I want to derive a dict from it, also called
> > headers.  So I figured the string would be called strHeaders, and the dict,
> > dctHeaders probably, but when a precedent for something like that exists, I
> > like to use it.
>
> > "Kam-Hung Soh" <kamhung.... at gmail.com> wrote in message
>
> I have a my own sometime used convention od using dict names that
> mirror
> what is being mapped to what, so a dict mapping headers to body might
> be called head2body, in general a mapping from x to y I might call
> x2y.

I use the same convention, though it's less than ideal if x or y
consist of more than one word (typically joined with underscore), e.g.
"value2row_id" or if the values are also dicts
("category2value2instances").

George


From nick at craig-wood.com  Fri May 23 16:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 15:30:09 -0500
Subject: array of 64-bit ints?
References: <g16tub$qoj$1@rumours.uwaterloo.ca> <483700FF.1020704@v.loewis.de>
Message-ID: <slrng3e7un.dgr.nick@irishsea.home.craig-wood.com>

Martin v. L?wis <martin at v.loewis.de> wrote:
> > Is it possible to have an array of 64-bit-ints using the standard Python 
> > array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
> > "long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
> > "long long int" or "size_t".  However, according to the Python array 
> > documentation, arrays of "size_t" or "long long int" are not available.
> 
>  No, it's not possible.

You could do it with ctypes like this...

from ctypes import *

Array = c_int64 * 100

a = Array()
for i in range(100):
    a[i] = 2**63 - i
    
for i in range(100):
    print a[i]

prints

-9223372036854775808
9223372036854775807
9223372036854775806
[snip]
9223372036854775710
9223372036854775709

ctypes arrays are fixed length once created though.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gherron at islandtraining.com  Fri May 16 17:40:51 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 14:40:51 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
Message-ID: <482DFF63.7020701@islandtraining.com>

bruno.desthuilliers at gmail.com wrote:
> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>   
>> Dan Upton wrote:
>>     
>>> for pid in procs_dict:
>>>   if procs_dict[pid].poll() != None
>>>    # do the counter updates
>>>    del procs_dict[pid]
>>>       
>>> The problem:
>>>       
>>> RuntimeError: dictionary changed size during iteration
>>>       
>> I don't know if the setup with the pids in a dictionary is the best way to
>> manage a pool of processes... I'll leave it others, presumably more
>> knowledgable, to comment on that. :-)  But I can tell you how to solve the
>> immediate problem:
>>
>>    for pid in procs_dict.keys():
>>     

No, keys() produces a list (which is what is wanted here). 

It's iterkeys() that produces an iterator which would reproduce the OP's 
problem.

And then, in Python3, keys() produces something else altogether (call a 
view of the dictionary) which would provoke the same problem, so yet 
another solution would have to be found then.

Gary Herron

>
> I'm afraid this will do the same exact thing. A for loop on a dict
> iterates over the dict keys, so both statements are strictly
> equivalent from a practical POV.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From notbob at nothome.com  Sat May 10 23:45:38 2008
From: notbob at nothome.com (notbob)
Date: Sun, 11 May 2008 03:45:38 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<HaCdnbrDHoZbyLvVnZ2dnUVZ_gSdnZ2d@earthlink.com>
Message-ID: <CZtVj.53584$kl6.8387@fe103.usenetserver.com>

On 2008-05-11, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> on the Amiga, it could be any of those applications).

ahhh.... the Amiga, the demise of which was one of the great calamaties of
our cyber time.  (sniff)

nb


From inhahe at gmail.com  Wed May 21 10:57:32 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 10:57:32 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <YJWYj.78109$%15.3302@bignews7.bellsouth.net>

one of the few things i miss from C is being able to use assignment in 
expressions.   that's the only thing, really.
also there's no switch/case, you have to use a dictionary of functions 
instead, although i rarely need that, usually i just use elif.

<boblatest at googlemail.com> wrote in message 
news:7df99fd4-21c9-49a1-ba65-e55794fd4c12 at 26g2000hsk.googlegroups.com...
> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
>> Although that solution is pretty, it is not the canonical solution
>> because it doesn't cover the important case of "if" bodies needing to
>> access common variables in the enclosing scope.  (This will be easier
>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> IMHO closer to a canonical solution to this FAQ.
>
> Hello everybody,
>
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.
>
> Thanks again,
> robert
>
> PS: Since I'm testing only three REs, and I only need the match
> results from one of them, I just re-evaluate that one. 




From hdante at gmail.com  Thu May 15 12:43:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 16:43:15 +0000 (UTC)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
Message-ID: <g0hp73$erh$1@ger.gmane.org>

Em Thu, 15 May 2008 08:03:40 -0700, p.wallstedt escreveu:

> Hi all!
> 
> I have a small but rather annoying problem with pyserial. I want to open
> a file on disk for reading and then open a com-port, write lines from
> the file to the port and then read something back and compare it to the
> next line in the file. Should be simple. And it is, apart from the fact
> that the file seems to be doubled ...? Or it loops through the file
> twice.
> 
> If I exclude the "import serial" it works.
> 
> Any ideas?
> 
> thanks
> Peter

 Are you sure you need to reinvent the wheel ? For example, pppd has the 
"chat" application:

 http://www.hmug.org/man/8/chat.php



From krumblebunk at gmail.com  Tue May  6 08:27:26 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 05:27:26 -0700 (PDT)
Subject: Comparing strings - akin to Perl's "=~"
Message-ID: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>

Hello gurus,

I am learning Python to take the place of Perl in my toolbox of bits
and bobs, and writing something pretty simple in theory, but having a
hard time in Python with it - I am using a 3rd party module, and I am
sure the etiquette of this channel states that this is pure Python
questions only, but please bare with me in light of this, as my
question does indeed relate to Python only.

I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
module), and when it returns the result, I am pulling it out as such:

try:
    sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
except pg.InternalError:
    print "Failed to execute SQL: %s" % sql
    exit

for foo in sc.query(sql).dictresult():   <- this returns a dict of the
result
    f=dict(foo)
    for k in f.iteritems()
        if k == '^Hostname':               <-- need this sort of
behaviour - match a partial string.
        print "%s" % f[3]              <-- ..and if true, need to pull
out the 4th column on that line.

This breaks spectacularly -

any ideas?

thanks!

kb.



From carsten.haese at gmail.com  Tue May 13 21:49:14 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Tue, 13 May 2008 21:49:14 -0400
Subject: 2004 example, passing function error
In-Reply-To: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
References: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
Message-ID: <uyrWj.1339$l97.374@flpi144.ffdc.sbc.com>

globalrev wrote:
>  but it looks like he just copied his
> shell...has there been a change since 2004 inr egards to how you can
> pass functions as arguments to functions??

It looks like it's copy/pasted from a shell, but it's not. No past or 
present Python interpreter could produce an interactive session like 
that under any circumstances. My guess is that instead of copy/pasting, 
the author simply retyped the session and made a mistake in doing so.

--
Carsten Haese
http://informixdb.sourceforge.net


From roy at panix.com  Sat May 24 10:57:29 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 10:57:29 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <roy-0E13C2.10572924052008@70-1-84-166.area1.spcsdns.net>

In article 
<a2c4d209-e203-4b43-aa57-f9f0248b2409 at a70g2000hsh.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> Whilst I understand your point, I think the danger is that you end up
> with hidden dependencies on the test order - which you're not aware of
> and that the tests never expose.

Well, yes.  But, this is no worse than the current situation, where the 
tests are run in alphabetical order by default.  You could still have 
hidden dependencies and not realize it.


From casey.mcginty at gmail.com  Sun May 25 18:46:50 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 12:46:50 -1000
Subject: Organizing a Python project
In-Reply-To: <op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>

On Sat, May 24, 2008 at 2:11 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> > 2. In the top of your package directory it is typical to have a module
> name
> > '_package.py'. This is ideally where the main command line entry point
> for
> > the package code should be placed.
>
> Why the underscore? And I usually don't put executable scripts inside a
> package - I consider them just libraries, to be imported by other parts of
> the application.
> It's easier to test too when your tests *and* the application code are
> external to the package itself.
>

Ok, guess using the '_package' name is not very common. I saw it used by the
dbus module. My whole concern here is that using a script will fragment your
application code across the file system. I would prefer to have it all in a
single spot. So I still like they idea of keeping most of application code
(argument parsing, help output, initialization) inside of the package. The
'_' should indicate that any other modules using your package should import
that module.

- Casey
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From mathieu.prevot at ens.fr  Sat May 24 08:56:30 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Sat, 24 May 2008 14:56:30 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
In-Reply-To: <69qgseF31lv3aU1@mid.uni-berlin.de>
References: <mailman.1522.1211630957.12834.python-list@python.org>
	<69qgseF31lv3aU1@mid.uni-berlin.de>
Message-ID: <3e473cc60805240556t26019274x3e028ffe9196f46@mail.gmail.com>

2008/5/24 Diez B. Roggisch <deets at nospam.web.de>:
> Mathieu Prevot schrieb:
>>
>> Hi
>>
>> I import subprocess and use Popen, but PIPE is not defined. I used
>> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
>> always the same. What am I missing ?
>
> Without showing code, it's hard to know. A guess is: if you use
>
> import subprocess
>
>
> then use
>
>
> subprocess.PIPE
>
> Or if using
>
> from subprocess import Popen
>
> make sure to do
>
> from subprocess import Popen, PIPE
>
> Diez

Indeed... thank you !

Mathieu


From mcknight0219 at gmail.com  Mon May 12 22:19:05 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 19:19:05 -0700 (PDT)
Subject: how to get information of a running prog in python
Message-ID: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>

Well, i know it may be a little non-python thing, however, I can think
of no place better to post this question :)

can anyone tell me, in python, how to obtain some information of a
running program?
paticularly, if i am playing some music in audacious or other media
player, how can i get the the name and some other info of current
playing song? It seems that audicious doesn't output on run-time


From joe.p.cool at googlemail.com  Sun May 11 17:10:39 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Sun, 11 May 2008 14:10:39 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
	<68ifekF2sqbg2U1@mid.uni-berlin.de>
Message-ID: <be07e10a-36bd-4aa3-8df1-5b4e529802e9@s50g2000hsb.googlegroups.com>

On 9 Mai, 10:14, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> If you can work with the license (GPL), I suggest Qt4

Thanks for your helpful hints, guys.

--
Joe P. Cool


From pDOTpagel at helmholtz-muenchen.de  Sat May 31 11:15:12 2008
From: pDOTpagel at helmholtz-muenchen.de (Philipp Pagel)
Date: Sat, 31 May 2008 15:15:12 +0000 (UTC)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
	<g1p50c$97h$1@news.lrz-muenchen.de>
	<45f694b7-8c2c-4548-b6e8-42a12e96e0d4@d77g2000hsb.googlegroups.com>
Message-ID: <g1rq20$tmb$1@news.lrz-muenchen.de>

Mensanator <mensanator at aol.com> wrote:
> On May 30, 10:03???am, Philipp Pagel <pDOTpa... at helmholtz-muenchen.de>
> wrote:
> > 'P' is obviously not an ASCII representation of a number.

> It is in base 36.

Sure, but if that was the OP's intent he would most likely have
mentioned it...

As others have already guessed, it's most likely somethink like ord() he
was after.

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f. Genomorientierte Bioinformatik
Technische Universit?t M?nchen
http://mips.gsf.de/staff/pagel


From ptmcg at austin.rr.com  Tue May 20 10:58:00 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 07:58:00 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>

On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> I posted this code last night in response to another thread, and after I
> posted it I got to wondering if I had misused the list comprehension. Here's
> the two examples:
>
> Example 1:
> --------------------
> def compress(s):
> ? ? new = []
>
> ? ? for c in s:
> ? ? ? ? if c not in new:
> ? ? ? ? ? ? new.append(c)
> ? ? return ''.join(new)
> ----------------------
>
> Example 2:
> ------------------------
> def compress(s):
> ? ? new = []
> ? ? [new.append(c) for c in s if c not in new]
> ? ? return ''.join(new)
> --------------------------
>
> In example 1, the intention to make an in-place change is explicit, and it's
> being used as everyone expects it to be used. In example 2, however, I began
> to think this might be an abuse of list comprehensions, because I'm not
> assigning the result to anything (nor am I even using the result in any
> way).
>
> What does everyone think about this? Should list comprehensions be used this
> way, or should they only be used to actually create a new list that will
> then be assigned to a variable/returned/etc.?

Why not make the list comp the actual list you are trying to build?

def compress(s):
    seen = set()
    new = [c for c in s if c not in seen and (seen.add(c) or True)]
    return ''.join(new)

or just:

def compress(s):
    seen = set()
    return ''.join(c for c in s if c not in seen and (seen.add(c) or
True))

Using the set also gets rid of that nasty quadratic performance
thingy.

-- Paul


From kay.schluehr at gmx.net  Fri May 23 01:00:17 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 22 May 2008 22:00:17 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
Message-ID: <b959fa66-51d4-4704-8a60-76ec7da871f2@m3g2000hsc.googlegroups.com>

On 23 Mai, 00:51, Larry Bates <larry.ba... at websafe.com`> wrote:

> > I've yet to see a web application written in Python which is really
> > fast.
>
> You are just dead wrong about this.

No, he can demand whatever he wants and we can be stupid enough to
respond.


From spamgrinder.trylater at ggmail.com  Sun May  4 00:18:47 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Sat, 03 May 2008 23:18:47 -0500
Subject: is +=1 thread safe
In-Reply-To: <yfswsmbf0gm.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
Message-ID: <481D3927.4050509@ggmail.com>

Alexander Schmolck wrote:
> AlFire <spamgrinder.trylater at ggmail.com> writes:
> 
>>> The threading module already has a function to return the number of Thread
>>> objects currently alive.
>> I have threads within threads - so it does not suit me :-(.
> 
> How about using a scalar numpy array? They are mutable, so I assume that x +=
> 1 should be atomic.
> 
I ended up with following:

	counter=[]			counter=0

	counter.append(None)		counter+=1

	counter.pop()			counter-=1

	len(counter)			counter

A.


From meesters at uni-mainz.de  Fri May 30 09:05:47 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Fri, 30 May 2008 15:05:47 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <g1ou3b$nqe$1@news1.zdv.uni-mainz.de>

Ok now, I know where the error is: "y" actually contained refcounts. This,
of course, is complete nonsense and causes the interpreter to crash at some
point.

Thanks to all of you: You helped at least to track down the problem.

Christian


From mnikhil at gmail.com  Wed May 14 14:25:51 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 23:55:51 +0530
Subject: readlines with line number support?
Message-ID: <g0farj$70d$1@registered.motzarella.org>

Hi,

I am reading a file with readlines method of the filepointer object 
returned by the open function. Along with reading the lines, I also need 
to know which line number of the file is read in the loop everytime.
I am sure, the line should have the property/attribute which will say 
the line number of the file.

If there is none, do I have to end up using the counter in the loop?

fp = open("file", "r")
lineno = 0
for line in fp.readlines():
	print "line number: " + lineno + ": " + line.rstrip()
         lineno = lineno + 1

--

Thanks,
Nikhil


From roy at panix.com  Wed May 21 15:13:18 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 15:13:18 -0400
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
Message-ID: <roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>

In article 
<90ecca29-c4d8-4e89-908a-93850d7de1bf at i76g2000hsf.googlegroups.com>,
 bukzor <workitharder at gmail.com> wrote:

> Does anyone have a pythonic way to check if a process is dead, given
> the pid?
> 
> This is the function I'm using is quite OS dependent. A good candidate
> might be "try: kill(pid)", since it throws an exception if the pid is
> dead, but that sends a signal which might interfere with the process.
> 
> Thanks.
> --Buck

The canonical way is to do kill(pid, 0).  If it doesn't throw, the process 
exists.  No actual signal is sent to the process either way.

Of course, the process could exit immediately after the kill() call, so by 
the time you find out it's alive, it's dead.  Such is life.


From inhahe at gmail.com  Fri May 16 10:27:45 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:27:45 -0400
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <_PgXj.4838$Kk3.4214@bignews9.bellsouth.net>

>>> a = 1
>>> b = eval("a")
>>> b
1
>>> a =1
>>> b = globals()["a"]
>>> b
1
>>> a =1
>>> b = locals()["a"]
>>> b
1
<rocco.rossi at gmail.com> wrote in message 
news:aec6cdd8-3bde-4d68-ad93-d9ece9567886 at b1g2000hsg.googlegroups.com...
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
>
> foo = some_function("foo")
>
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
>
> Thank you. 




From kyosohma at gmail.com  Wed May  7 08:57:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 05:57:43 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org>
Message-ID: <f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>

On May 7, 4:45?am, Tim Golden <m... at timgolden.me.uk> wrote:
> In a spirit of being helpful... :)
>
> The code below (which I imagine every Windows programmer writes
> sometime in their Python life) mimics the os.walk functionality, yielding
> the key, subkeys, and values under a particular starting point in the
> registry. The "if __name__ == '__main__'" test run at the bottom does
> more-or-less what you were asking for originally, I think, converting
> some name to some other name wherever it appears.
>
> <module regwalk.py>
> import _winreg
>
> HIVES = {
> ? "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
> ? "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
> ? "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
> ? "HKEY_USERS" : _winreg.HKEY_USERS,
> ? "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
>
> }
>
> class RegKey:
>
> ? def __init__ (self, name, key):
> ? ? ?self.name = name
> ? ? ?self.key = key
>
> ? def __str__ (self):
> ? ? return self.name
>
> def walk (top):
> ? """walk the registry starting from the key represented by
> ? top in the form HIVE\\key\\subkey\\..\\subkey and generating
> ? key, subkey_names, values at each level.
>
> ? key is a lightly wrapped registry key, including the name
> ? and the HKEY object.
> ? subkey_names are simply names of the subkeys of that key
> ? values are 3-tuples containing (name, data, data-type).
> ? See the documentation for _winreg.EnumValue for more details.
> ? """
> ? if "\\" not in top: top += "\\"
> ? root, subkey = top.split ("\\", 1)
> ? key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ | _winreg.KEY_SET_VALUE)
>
> ? subkeys = []
> ? i = 0
> ? while True:
> ? ? try:
> ? ? ? subkeys.append (_winreg.EnumKey (key, i))
> ? ? ? i += 1
> ? ? except EnvironmentError:
> ? ? ? break
>
> ? values = []
> ? i = 0
> ? while True:
> ? ? try:
> ? ? ? values.append (_winreg.EnumValue (key, i))
> ? ? ? i += 1
> ? ? except EnvironmentError:
> ? ? ? break
>
> ? yield RegKey (top, key), subkeys, values
>
> ? for subkey in subkeys:
> ? ? for result in walk (top + "\\" + subkey):
> ? ? ? yield result
>
> if __name__ == '__main__':
> ? for key, subkey_names, values in walk ("HKEY_LOCAL_MACHINE\\Software\\Python"):
> ? ? print key
> ? ? for (name, data, type) in values:
> ? ? ? print " ?", name, "=>", data
> ? ? ? if type == _winreg.REG_SZ and "TJG" in data:
> ? ? ? ? _winreg.SetValueEx (key.key, name, 0, type, data.replace ("TJG", "XYZ"))
>
> </module regwalk.py>
>
> TJG

This is pretty cool stuff, Tim. Of course, it would also seriously
screw up some programs if you decided to replace the wrong phrase.
Just a word of warning to the OP: be sure to make a backup of the
registry before doing something like this. Trying to fix a messed up
registry from the command line is not a fun way to spend the
afternoon.

Mike


From hdante at gmail.com  Mon May 26 21:14:23 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 26 May 2008 18:14:23 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
	<8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>
	<d7f00113-f881-480f-9051-b688b1e60c84@m36g2000hse.googlegroups.com>
Message-ID: <eab0c6c0-7582-4da1-8119-2cb50fcd65cf@34g2000hsh.googlegroups.com>

On May 26, 6:54?pm, Peter <p.wallst... at gmail.com> wrote:
> On 23 Maj, 16:13, Grant Edwards <gra... at visi.com> wrote:
>
>
>
> > On 2008-05-23, Peter <p.wallst... at gmail.com> wrote:
>
> > > On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> > >> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> > >> > I have a small but rather annoying problem withpyserial. I want to
> > >> > open a file on disk for reading and then open a com-port, write lines
> > >> > from the file to the port and then read something back and compare it
> > >> > to the next line in the file. Should be simple. And it is, apart from
> > >> > the fact that the file seems to be doubled ...? Or it loops through
> > >> > the file twice.
>
> > >> > If I exclude the "import serial" it works.
>
> > >> > Any ideas?
>
> > >> Your problem is in line 117 of your program.
>
> > > Do you have to much time?
>
> > "Do you have a sense of irony?" he asked, already knowing the answer.
>
> > --
> > Grant
>
> Grant - "Do you have a sence of appropriateness"? he asked, already
> knowing the answer. I had no idea this is a comedy club. I might argue
> that my reply was also some sort of humor, but you clearly didn't see
> it that way. Maybe you should try living according to the rules you
> make for others?
>
> Diez - Did you mean the section which covers Asperger's Syndrome?
>
> I'm just being a hacker here guys ... according to the guidelines.
>
> It's amazing how such a simple question gets derailed immediately.
> Without any light on the subject ? whatsoever.

 Try asking about your problem again. Think before writing. Read your
text after you write it. Tell what you are trying to do, how you are
trying to do and what's the buggy behaviour. Copy the relevant part of
your source code here.


From maric at aristote.info  Fri May 23 01:39:29 2008
From: maric at aristote.info (Maric Michaud)
Date: Fri, 23 May 2008 07:39:29 +0200
Subject: Decorator metaclass
In-Reply-To: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
Message-ID: <200805230739.29745.maric@aristote.info>

Le Friday 23 May 2008 04:28:22 thomas.karolski at googlemail.com, vous avez 
?crit?:
> Hi,
> I would like to create a Decorator metaclass, which automatically
> turns a class which inherits from the "Decorator" type into a
> decorator.
> A decorator in this case, is simply a class which has all of its
> decorator implementation inside a decorator() method. Every other
> attribute access is being proxied to decorator().getParent().
>
> ...
>
> -------------------------------------------------------
> Unfortunately this does not work. The newly defined __init__ method
> inside __new__, does a call to impl(*args, **dargs). However, since
> the HBar.__init__ calls the Decorator.__init__ method, but the
> HBar.__init__ method no longer resides inside HBar, but rather inside
> HBarImpl (which is no longer a subtype of Decorator), the compiler
> complains that Decorator.__init__ is not being called with a Decorator
> instance as its first argument (which is true).
> I tried changing the definition of impl inside __new__ to have
> Decorator as one of its bases, but then for some reason impl(*args,
> **dargs) asks for 4 arguments (just like __new__) and I have no clue
> as to why that happens.
>
> Any help on this?
>

The problem with kind of design is that you must break the rules of class 
inheritance, and it seems like a strange idea to implement decorators by 
inheritance.

Of course you could do all sort of magic with python, but what is your goal ?
In your example, should the implementation types inherit from each other ?
In that case, do you want to preserve the same semantic for __init__ as in 
standard python class (this could be a hard job) ?

This quick fix seems to work with your example, but add extra magic to 
automatically call the super __init__ of the parent implementation, this 
could be a bad idea, use with caution ! (I still think it's a bad design, 
using composition and proxy classes is much more simple and clear)

class DecoratorType(type):
        def __new__(cls, name, bases, dct):

                # create a new class which will store all of the 
implementation
                parent_impl_type = bases[0] is object and object \
                                                       or bases[0]._impl_type
                impl = type('%sImpl'%name,(parent_impl_type,),dict(dct))
                dectype = type.__new__(cls, name, bases, {'_impl_type' : 
impl })

                # update the old class to implement this implementation
                def __init__(self, *args, **dargs):
                        print args, dargs
                        new_impl = impl(*args, **dargs)
                        super(dectype._impl_type, new_impl).__init__(*args,
                                                                     **dargs)
                        object.__setattr__(self, '_impl', new_impl)
                def decorator(self):
                        return object.__getattribute__(self,'_impl')
                def __getattribute__(self, attr):
                        if attr=="decorator":
                                return 
object.__getattribute__(self,'decorator')
                        return getattr(object.__getattribute__(
                                            self, 'decorator')(), attr)
                dectype.__init__ = __init__
                dectype.decorator = decorator
                dectype.__getattribute__ = __getattribute__

                return dectype

class Decorator(object):

        __metaclass__ = DecoratorType

class HBar(Decorator):
        def __init__(self, number):
                print 'hb:', number
                self._number = number
        def inc(self):
                self._number += 1
        def p(self):
                print self._number

class HBar2(HBar) :
        def __init__(self, number):
                print 'hb2:', number
                self._hb2 = number
        def inc2(self):
                self._hb2 += 1
        def p2(self):
                print self._hb2


hbar = HBar(10)
for each in dir(hbar.decorator()):
        print each

hbar.decorator().p()
hbar.decorator().inc()
hbar.decorator().p()

hb2 = HBar2(5)
hb2.p()
hb2.p2()
hb2.inc()
hb2.p()
hb2.p2()
hb2.inc2()
hb2.p()
hb2.p2()



-- 
_____________

Maric Michaud
_____________


From jstucklex at attglobal.net  Sun May 25 20:12:32 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:12:32 -0400
Subject: php vs python
In-Reply-To: <g1clpb$1pu0$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
Message-ID: <V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>> Not at all.  I do it every day.
>>
>> And BTW - yes, I write Python, also.  But I find I can write better,
>> faster code in PHP.
> 
> I find I can write better code in Python. Maybe it's just a matter of 
> personal preference?
> 
>> Do you write PHP?
> I did. And I hated it very much. I hated it so much that even I had few 
> Python scripts that generated PHP for me when it was possible.
> 

So you really don't write PHP.  Enough said.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From steven.p.clark at gmail.com  Mon May 19 10:38:18 2008
From: steven.p.clark at gmail.com (Steven Clark)
Date: Mon, 19 May 2008 10:38:18 -0400
Subject: scope of optional arguments
In-Reply-To: <g0s2v3$fa6$01$1@news.t-online.com>
References: <g0s2v3$fa6$01$1@news.t-online.com>
Message-ID: <663744510805190738q9431258kb30c8d8f3656ee68@mail.gmail.com>

http://www.ferg.org/projects/python_gotchas.html#contents_item_6

On Mon, May 19, 2008 at 10:30 AM, cseja <p5secr2 at uni-jena.de> wrote:
> If I call
>
> print walk([1,2,3], [])
> print walk([5,6,7])
>
> I get
>
> [1, 2, 3]
> [4, 5, 6]
>
> but when I call
>
> print walk([1,2,3])
> print walk([5,6,7])
>
> I get
>
> [1, 2, 3]
> [1, 2, 3, 4, 5, 6]
>
> at stdout, where
>
> def walk(seq, result = []):
>  for item in seq:
>    result.append(item)
>  return result
>
> Does that mean that the scope of optional arguments is global if they aren't
> used and local if they are (or am I missing something here)?
>
> Regards,
> CS
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From dgetsman at amirehab.net  Wed May 21 11:59:57 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 08:59:57 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
Message-ID: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>

Okay so I'm writing a script in python right now as a dirty fix for a
problem we're having at work..  Unfortunately this is the first really
non-trivial script that I've had to work with in python and the book
that I have on it really kind of sucks.

I'm having an issue parsing lines of 'last' output that I have stored
in a /tmp file.  The first time it does a .readline() I get the full
line of output, which I'm then able to split() and work with the
individual fields of without any problem.  Unfortunately, the second
time that I do a .readline() on the file, I am only receiving the
first character of the first field.  Looking through the /tmp file
shows that it's not corrupted from the format that it should be in at
all...  Here's the relevant script:

----
    #parse
    Lastdump = open('/tmp/esd_tmp', 'r')

    #find out what the last day entry is in the wtmp
    cur_rec = Lastdump.readline()
    work = cur_rec.split()

    if debug == 1:
        print work
        print " is our split record line from /tmp/esd_tmp\n"

    startday = work[3]

    if debug == 1:
        print startday + " is the starting day\n"
        print days
        print " is our dictionary of days\n"
        print days[startday] + " is our ending day\n"

    for cur_rec in Lastdump.readline():
        work = cur_rec.split()

        if debug == 1:
            print "Starting table building pass . . .\n"
            print work
            print " is the contents of our split record line now\n"
            print cur_rec + " is the contents of cur_rec\n"

        #only go back 2 days

        while work[0] != days[startday]:
            tmp = work[1]
            if table.has_key(work[0]):
                continue
            elif tmp[0] != ':':
                #don't keep it if it isn't a SunRay terminal
identifier
                continue
            else:
                #now we keep it
                table[work[0]] = tmp
----

the first and second sets of debugging output show everything as they
should be...  the third shows that the next working line (in cur_rec),
and thus 'work', as well, only hold the first character of the line.
Here's the output:

----
Debugging run


Building table . . .

['dgetsman', 'pts/3', ':0.0', 'Wed', 'May', '21', '10:21', 'still',
'logged',
'in']
 is our split record line from /tmp/esd_tmp

Wed is the starting day

{'Wed': 'Mon', 'Sun': 'Fri', 'Fri': 'Wed', 'Thurs': 'Tues', 'Tues':
'Sun',
'Mon': 'Sat', 'Sat': 'Thurs'}
 is our dictionary of days

Mon is our ending day

Starting table building pass . . .

['d']
 is the contents of our split record line now

d is the contents of cur_rec

----
And thus everything fails when I try to work with the different fields
in subsequent script afterwards.  Does anybody have an idea as to why
this would be happening?

Oh, and if relevant, here's the datafile's first few lines:

----
dgetsman pts/3        :0.0             Wed May 21 10:21   still logged
in
dgetsman pts/2        :0.0             Wed May 21 09:04   still logged
in
dgetsman pts/1        :0.0             Wed May 21 08:56 - 10:21
(01:24)
dgetsman pts/0        :0.0             Wed May 21 08:56   still logged
in

I would really appreciate any pointers or suggestions you can give.

<a href="http://www.zoominfo.com/people/Getsman_Damon_-214241.aspx">
*Damon Getsman
Linux/Solaris System Administrator
</a>


From johnjsal at gmailNOSPAM.com  Thu May 22 23:37:45 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Thu, 22 May 2008 23:37:45 -0400
Subject: Relationship between GUI and logic?
Message-ID: <48363c34$0$15204$607ed4bc@cv.net>

I know that it is good programming practice to keep GUI and logic code 
physically separate, by using XRC for example, but I'm wondering if it's 
also good practice (and even possible) to keep them separate from an 
implementation standpoint as well. Basically what I mean is, should it 
be possible to write, for example, the logic for a strategy game without 
even knowing what the graphics will look like or how they will work?

To be more specific, let's say I want to create a simple, 2D strategy 
game. It will have a board layout like chess or checkers and the player 
will move around the board. Let's say this is all I know, and perhaps I 
don't even know *this* for sure either. Is it possible to write the 
logic for such a game at this point?

Let's say I want to write a "move" function (or perhaps it would be a 
method of a "Character" class) for moving the player around. Could you 
really write this function without 1) knowing what the interface will 
look like, and 2) integrating GUI code with the logic?

Another example could be printing messages to the player. If I need to 
say "You killed the monster!", is there a general way to write this, or 
do I need to specifically refer to GUI widgets and methods, etc. in 
order for it to be displayed properly?

Basically, the question is this: can you write the logic behind a 
program (whether it be a game, an email client, a text editor, etc.) 
without having any idea of how you will implement the GUI?

Thanks!


From tjreedy at udel.edu  Sat May 10 18:46:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 18:46:13 -0400
Subject: how to reference my own module ?
References: <4825F6BB.9090707@gmail.com>
Message-ID: <g058jk$jcb$1@ger.gmane.org>


"Stef Mientki" <stef.mientki at gmail.com> wrote in message 
news:4825F6BB.9090707 at gmail.com...
| hello,
|
| I've a library that I import as
|
|    import ppygui.api as gui
|
| the reason for this construct is that I've to use different libraries
| for different platforms.
|
| Now I like to write some examples in the library (activated by if
| __name__ == '__main__' :)
| and I would that these examples can be used in the user program just by
| copy / paste.
|
| For calling a function / class in the user program I've to write:
|
|    sizer = gui.VBox ()
|
| So also write exactly the same sentence in the library examples,
| but  "gui" is not recognized
|
| Any ideas how I can realize the above ?

Put the import statement in the example so 'gui' *is* recognized ;-)

If I understand what you meant ...
xploro/test/begin.py
-----------------------------
def start():
    print('hello')

if __name__ == '__main__':
    import xploro.test.begin as etb
    etb.start()
----------------------------
prints 'hello'|

Import is a name-binding statement that also creates a module when it does 
not exist already.  Modules can be bound to multiple names just like any 
other object.

Terry Jan Reedy





From mcknight0219 at gmail.com  Fri May 23 11:14:00 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 08:14:00 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
Message-ID: <8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>

On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jimmy schrieb:
>
> > On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> >> Jimmy wrote:
> >>> Hi to all
> >>> python now has grown to a versatile language that can
> >>> accomplish tasks for many different purposes. However,
> >>> AFAIK, little is known about its ability of kernel coding.
> >>> So I am wondering if python can do some kernel coding that
> >>> used to be the private garden of C/C++. For example, can python
> >>> intercept the input of keyboard on a system level? someone told me
> >>> it's a kernel thing, isn't it?
> >>http://wiki.python.org/moin/elmer
>
> > well, straightly speaking, how can I know a key is pressed on a system-
> > level if
> > using python?
>
> What has that todo with kernel programming? You can use e.g. pygame to
> get keystrokes. Or under linux, read (if you are root) the keyboard
> input file - I've done that to support several keyboards attached to a
> machine.
>
> And the original question: no, python can't be used as kernel
> programming language. Amongst other reasons, performance & the GIL
> prevent that.
>
> Diez

sorry, my aim is not limited to one particular program. Yes, many
library can
permit you to respond to keyboard event, however, what I want is a
universal
function. as long as a key is pressed, no matter where, my program can
repond.

I am quite strange with this topic. But according to my understanding,
any event, keyboard event
for example, once triggered, will be dilivered by keyboard driver to X
system, and then
any running program can either choose to respond or ignore. So my
question can be translated to:
how to make my program respond ?


From szrRE at szromanMO.comVE  Sat May 31 12:27:11 2008
From: szrRE at szromanMO.comVE (szr)
Date: Sat, 31 May 2008 09:27:11 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
Message-ID: <g1ru8v0v3l@news4.newsguy.com>

Peter Duniho wrote:
> On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:
>
>> Arne Vajh?j wrote:
>>> Stephan Bour wrote:
>>>> Lew wrote:
>>>> } John Thingstad wrote:
>>>> } > Perl is solidly based in the UNIX world on awk, sed, } > bash 
>>>> and C. I don't like the style, but many do.
>>>> }
>>>> } Please exclude the Java newsgroups from this discussion.
>>>>
>>>> Did it ever occur to you that you don't speak for entire news
>>>> groups?
>>>
>>> Did it occur to you that there are nothing about Java in the above ?
>>
>> Looking at the original post, it doesn't appear to be about any
>> specific language.
>
> Indeed.  That suggests it's probably off-topic in most, if not all,
> of the newsgroups to which it was posted, inasmuch as they exist for
> topics specific to a given programming language.

Perhaps - comp.programming might of been a better place, but not all 
people who follow groups for specific languages follow a general group 
like that - but let me ask you something. What is it you really have 
against discussing topics with people of neighboring groups? Keep in 
mind you don't have to read anything you do not want to read. [1]

> Regardless, unless you are actually reading this thread from the
> c.l.j.p newsgroup, I'm not sure I see the point in questioning
> someone who _is_ about whether the thread belongs there or not.

I would rather have the OP comment about that, as he started the thread. 
But what gets me is why you are against that specific group being 
included but not others? What is so special about the Java group and why 
are you so sure people there don't want to read this thread? [1] What 
right do you or I or anyone have to make decisions for everyone in a 
news group? Isn't this why most news readers allow one to block a 
thread?

> And if it's a vote you want, mark me down as the third person reading
> c.l.j.p that doesn't feel this thread belongs.  I don't know whether
> Lew speaks for the entire newsgroup, but based on comments so far,
> it's pretty clear that there unanimous agreement among those who have
> expressed an opinion.

Ok, so, perhaps 3 people out of what might be several hundred, if not 
thousand (there is no way to really know, but there are certainly a lot 
of people who read that group, and as with any group, there are far more 
readers than there are people posting, so, again, just because you or 
two other people or so don't want to read a topic or dislike it, you 
feel you can decide for EVERYONE they mustn't read it? Again, this is 
why readers allow you to ignore threads. Please don't force your views 
on others; let them decide for themselves. [1]


[1] I do not mean this topic specifically,  but in general,  if one
    dislikes a thread, they are free to ignore it. I find it rather
    inconsiderate to attempt to force a decision for everyone, when
    one has the ability to simply ignore the thread entirely.


-- 
szr 




From duncan.booth at invalid.invalid  Tue May 20 10:16:56 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 14:16:56 GMT
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <Xns9AA49B6C2E27Fduncanbooth@127.0.0.1>

Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:

> C OTOH was designed to be compiled to assembly code (or directly to 
> machine code) and as a result there are no (or virtually) no 
> implementations that interpret C or compile it to bytecode.

Have you considered Microsoft's C/C++ compiler targetted at .Net. That 
compiles to a bytecode known as MSIL which is then interpreted and/or JIT 
compiled to machine code.

> I love Python, but IMHO it's a bit silly to maintain that the fact that 
> Python compiles to byte code instead of assembly code/machine code is 
> purely a matter of implementation; on the contrary, I believe it's a 
> result of its design. I also think that there's a large difference 
> between byte code and machine code (in Python's case; I haven't looked 
> at other languages), and that it's a bit silly to try to trivialize that 
> difference.

And then there's IronPython which is targetted at .Net. That compiles to a 
bytecode known as MSIL which is then interpreted and/or JIT compiled to 
machine code.

-- 
Duncan Booth http://kupuguy.blogspot.com


From gagsl-py2 at yahoo.com.ar  Wed May  7 18:50:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 May 2008 19:50:44 -0300
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <op.uas22uw7x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 May 2008 18:38:15 -0300, globalrev <skanemupp at yahoo.se>  
escribi?:

> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
> 		return lambda x,inc=n: x+inc

lambda is just a shortcut for defining a function without a name.
The above code is the same as:

def addn(n):
     def inner(x, inc=n):
         return x+inc
     return inner

It should be clear now that addn returns a function. addn is a "function  
factory": builds functions by request. You ask it "give me a function that  
adds 5" and addn returns that function.

> if i do addn(5) it returns
>
>>>> addn(5)
> <function <lambda> at 0x01D81830>

If you try the other version, you would get:

<function inner at 0x00A3B970>

It's the same thing, except that lambda has no name.

> ok? so what do i write to make it actually do something.

adder5 = addn(5)
adder5(3)
-> 8

>  and is the
> inc=n necessary i cant do x+n?

Yes, you can, but there is a subtle difference that's hard to explain, and  
in this case it's absolutely irrelevant. Using inc=n "does the right  
thing" as it's a bit more efficient too.

-- 
Gabriel Genellina



From deets at nospam.web.de  Tue May  6 06:27:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:27:08 +0200
Subject: Bad form to access a *private variable* like _foo?
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
	<48200a7f$0$23642$426a74cc@news.free.fr>
Message-ID: <68aq4nF2r9b93U4@mid.uni-berlin.de>

> The way you wrote it here, yes. If there's no official way to do the
> same operation and you have a real use case for it - in which case you
> may want to add a commit() method to SQLObject's model base class and
> submit the patch to SQLObject's maintainer. But I strongly suspect
> there's a better way to handle this case in SQLObject's API.

There are other ways. For example,

sqlobject.sqlhub.threadingLocal.connection

if your system is using multiple threads correctly. Generally speaking,
sqlhub could/should be used.


Diez


From zerty.david at gmail.com  Thu May 15 16:31:00 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 15 May 2008 17:31:00 -0300
Subject: How to make an Activation Issue?
Message-ID: <5dc598e30805151331h7d40ea7dt8c2cc4ef38385d2c@mail.gmail.com>

Hi, How can I make something like this...
The final user installs the app
The app Runs and the User has to authenticate the app, which will be by
acessing a remote file on a Server, If he user dont authenticate the program
will run only for 3 days, after that it will be blocked until the user
authenticates it...
How can I do this?
Cya =)
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From salmoni at gmail.com  Sat May 31 10:27:48 2008
From: salmoni at gmail.com (Alan J. Salmoni)
Date: Sat, 31 May 2008 07:27:48 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <238d3920-1b9d-4caa-b667-139f290e9d67@i18g2000prn.googlegroups.com>

I'm not certain if this is what you want but try this for the first
window:

import __main__
localvars = __main__.__dict__
dir(localvars) # lists names of all objects available to the
interpreter.

And then you can pass localvars anywhere in the program - so after a
command is entered in one window, you can import the all locals into
the other by putting this function in the second window:

def SetWindow2Locals(localvars):
    __main__.__dict__ = localvars

and do the reverse by sending the updated localvars from window 2 to
window 1. Setting up an object between the 2 windows should be enough:

# window 1, must be created first
import __main__
localvars = __main__.__dict__
# create second window (say, win2)
win2.SetLocals(localvars)

in win2 after creation, there is a method/function:

SetLocals(localvars):
    __main__.__dict__ = localvars

If you want to store the object in something like a DB, you can store
this localvars dictionary rather than the actual objects. This should
be efficient because it stores the object name and ID only but not the
objects themselves. However, if the objects are deleted, after saving
and before re-loading, you may get some odd results but I'm not sure.
I would be very careful of using this in the wild.

You can also add objects singly to the dictionary by hand with a
function:

def importobject(obj):
    __main__.__dict__[obj.__name__] = obj

Which should make them available in the other window easily. If a new
object is added to the __main__.__dict__, just grab it and send it to
this function. Make sure that you send the object and not just its
name because the name is only a string.

Sorry if this is not what you were after.

Alan

On May 29, 2:47 pm, lixinyi... at gmail.com wrote:
> Hi!
>
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
>
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
>
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?
>
> Maybe I could just build a small database to store all the values and
> access them from both programs, but chances are sometimes I have to
> deal with big arrays, and they will eat extra memory if I keep them in
> a database. Is there anyway to access a shell's local memory buffer?
> I tried to use shell.interp.locals() in wxPython, but there's too many
> variables in the list which I don't actually need.
>
> Come on guys, give me some ideas. Thanks in advance!



From Magnus.Moraberg at gmail.com  Tue May 27 05:05:23 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 02:05:23 -0700 (PDT)
Subject: HTTPError sometimes when using urllib2.urlopen
References: <5978cac5-27e1-40cd-9abe-9e7536395468@d45g2000hsc.googlegroups.com>
Message-ID: <7311fb13-b4bb-4605-ac5e-c434e54cd0f1@8g2000hse.googlegroups.com>

On 27 Maj, 11:03, Magnus.Morab... at gmail.com wrote:
> Hi,
>
> I have the following code -
>
> import urllib2
> from BeautifulSoup import BeautifulSoup
>
> proxy_support = urllib2.ProxyHandler({"http":"http://
> 999.999.999.999:8080"})
> opener = urllib2.build_opener(proxy_support)
> urllib2.install_opener(opener)
>
> page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
> membership.asp')
> soup = BeautifulSoup(page)
>
> pageText = soup.findAll(text=True)
> print pageText
>
> Sometimes when I run this code I get the exception -
>
> HTTPError: HTTP Error 407 Proxy authentication required
>
> I seem to get this error repeatidly for a while, then I go a surf for
> a moment and when I run the code again the exception might have gone
> away. No idea why...
>
> I have no problems with firefox which uses the same proxy. The proxy
> requires no authentication...
>
> What might the issue be?
>
> Thanks,
>
> Barry.

I'm running with Python 2.5 with PythonWin

Heres the full exception -

Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\pythonwin\pywin\framework
\scriptutils.py", line 409, in ImportFile
    reload(sys.modules[modName])
  File "C:\Documents and Settings\konbgn\Desktop\parse.py", line 8, in
<module>
    page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
membership.asp')
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 380, in open
    response = meth(req, response)
  File "C:\Python25\lib\urllib2.py", line 491, in http_response
    'http', request, response, code, msg, hdrs)
  File "C:\Python25\lib\urllib2.py", line 418, in error
    return self._call_chain(*args)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 499, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 407: Proxy Authentication Required


From wolfgang.grafen at ericsson.com  Tue May 20 07:57:55 2008
From: wolfgang.grafen at ericsson.com (Wolfgang Grafen)
Date: Tue, 20 May 2008 13:57:55 +0200
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <g0uec3$cai$1@news.al.sw.ericsson.se>

globalrev schrieb:
> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

Your example is comprehensive compared to many other suggestions which 
is an advantage IMO. I minimised it further

for i in range(start, stop, step):
     if not i%15:
         print "FizzBuzz"
     elif not i%3:
         print "Fizz"
     elif not i%5:
         print "Buzz"
     else:
         print i

Best regards

Wolfgang


From deets at nospam.web.de  Tue May 27 08:07:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 14:07:04 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<mailman.1638.1211878217.12834.python-list@python.org>
Message-ID: <6a2bs6F35a5cmU1@mid.uni-berlin.de>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
> 
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.

You know that Webkit is the engine behind Safari? And one of the more
compliant implementations out there - millions of mac-users only use
Safari.


Diez


From thomas.troeger.ext at siemens.com  Tue May 20 06:20:59 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 12:20:59 +0200
Subject: Newbie In Python
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <g0u8mc$54e$1@aioe.org>

andrew.smith.cpp at gmail.com wrote:
> I have Heard About "Python" its a OOD Language. i have to Learn it
> where from i should start it.
> i have python compiler at linux Platform.
> anyone can suggest me about it.
> 
> Thanks In advance.

How about http://docs.python.org/tut/tut.html?


From jstucklex at attglobal.net  Sun May 25 20:15:40 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:15:40 -0400
Subject: php vs python
In-Reply-To: <g1cuvj$1rpd$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
Message-ID: <V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 16:23:12 -0700, NC wrote:
> 
>>> I didn't say that it's not possible to write good code in PHP,
>> Indeed you didn't.  You did, however, say that development in Python/
>> Django is inherently faster than development in PHP (your exact words
>> were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
>> 50-fold difference).  This claim has just been obliterated using the
>> example you (not I) provided; my estimate of two man-years for
>> developing WordPress turns out to be fairly close to what has actually
>> gone into the development of Byteflow.  In other words, so far we have
>> discovered no evidence of Python's (or PHP's, to be fair) superiority in
>> terms of developer's productivity.
> 
> In this case (excellent blogging tool), yes, I agree.
> 
>>> IMHO Python language is better designed
>> That is indeed a matter of opinion.  You like (among other things)
>> immutable strings, the off-side rule, the idea that everything is an
>> object, and the fine distinction between mutable lists and immutable
>> tuples, and I have no problem with you liking these features, as long as
>> you agree that other people may have reasons to like the alternatives
>> better.
> 
> I agree. We like different things and it's good.
> 
>>> Yes, it's possible to write something clean in PHP but it would require
>>> a lot more work.
>> In my opinion, it wouldn't, and in my experience, it doesn't.  All you
>> need is to actually put a designer in charge of design.  Additionally,
>> there are situations (rapid prototyping, for example) when
>> maintainability (the requirement behind the "clean code") is simply not
>> a concern.
> 
> It's hard to me to write good PHP. I feel happy programming in Python and 
> I felt very unhappy when I had to program in PHP.  I'm glad that you have 
> a different experience.
> 
> Ivan
> 

It's very easy for me to write good code in PHP.  I can say the same for 
a number of other good programmers I know.

As I've said before - good programmers can write good code in any language.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From caca at mailinator.com  Fri May 30 08:54:39 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Fri, 30 May 2008 05:54:39 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>

  Your project interests me. Actually I was thinking about doing the
same. I hadn't worked on it at all, but I though about it and had the
idea about reading the session namespace directly, which I though
would be stored in the __dict__ attribute of something.

  After reading your post, I have been trying a little bit, and I have
found a way to do it with ipython. If you open an ipython console,
press _ then hit TAB, you'll see it stores some useful information,
including all input, all output, and after some searching, a
dictionary matching all variables to its values.

__IPYTHON__.user_ns

  There is a little extra stuff in there that you don't want, but that
can be easily filtered (the extra stuff is either 'In', 'Out', 'help'
or starts with '_'). I've tried it, and you can change the value in
that dict to alter the value of the real variable. Say you have a
variable 'test':

test=5
__IPYTHON__.user_ns['test']=4
print test #prints 5

  If I get it right, python is a dynamic language, and you won't break
things by messing around with its inner stuff like this, but you
better check it.

  Is this what you had in mind?


From stefan_ml at behnel.de  Fri May  9 06:37:13 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 12:37:13 +0200
Subject: source beautifier
In-Reply-To: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
References: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
Message-ID: <48242959.3030405@behnel.de>

Marco Mariani wrote:
> Is there a program (free, payware, whatever) like polystyle for
> linux/python?
> 
> http://www.polystyle.com/features/python-beautifier.jsp
> 
> I've never used it, but the example is quite clear.

I tend to believe that running these tools on some average Python code would
not even change whitespace. ;)


> I just need it for python -- but it should not force me to use PEP8.

IMHO, a tool that automatically corrects code to comply with PEP-8 would
actually be more helpful, but I guess that's pretty far reached.

Stefan


From spectrumdt at gmail.com  Tue May  6 06:31:28 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Tue, 6 May 2008 03:31:28 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
Message-ID: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>

Hello.

I am trying to install Pypvm (http://pypvm.sourceforge.net/), the
Python interface to PVM ("Parallel Virtual Machine"). Unfortunately,
installation fails. I am hoping someone can help me fix it.

I am running Fedora Core 8 Linux.

The official Pypvm documentation is very helpful (or something),
providing the following:



To build Pypvm, cross your fingers and try:

make -f Makefile.pre.in boot
make

Or alternatively, try
  python setup.py build
  python setup.py install



For me, the "make -f Makefile.pre.in boot" seems to run fine, but the
"make" fails, giving (among other things) the following:



[ore at localhost pypvm-0.94]$ make
gcc -pthread -fPIC -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
  -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -
march=i386
  -mtune=generic -fasynchronous-unwind-tables -D_GNU_SOURCE -fPIC
  -I/usr/include/python2.5 -I/usr/lib/python2.5/config    -c
  ././pypvm_coremodule.c -o ./pypvm_coremodule.o
././pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
././pypvm_coremodule.c: In function ?was_error?:
././pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in
this function)
././pypvm_coremodule.c:81: error: (Each undeclared identifier is
reported only once
././pypvm_coremodule.c:81: error: for each function it appears in.)
././pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use
in this function)
././pypvm_coremodule.c:85: error: ?PvmMismatch? undeclared (first use
in this function)
[...]
././pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first
use in this function)
././pypvm_coremodule.c:1767: warning: unused variable ?optModule?
././pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
././pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
././pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
././pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
././pypvm_coremodule.c:1762: warning: unused variable
?exceptionModule?
make: *** [pypvm_coremodule.o] Error 1
[ore at localhost pypvm-0.94]$



In in alternate version, "python setup.py build" similarly fails:



[ore at localhost pypvm-0.94]$ python setup.py build
running build
running build_py
running build_ext
building 'pypvm_core' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-
D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables -
D_GNU_SOURCE -fPIC -fPIC -I/usr/include -I/usr/include/python2.5 -c
pypvm_coremodule.c -o build/temp.linux-i686-2.5/pypvm_coremodule.o
pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
pypvm_coremodule.c: In function ?was_error?:
pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in this
function)
pypvm_coremodule.c:81: error: (Each undeclared identifier is reported
only once
pypvm_coremodule.c:81: error: for each function it appears in.)
pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use in
this function)
[...]
pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first use in
this function)
pypvm_coremodule.c:1767: warning: unused variable ?optModule?
pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
pypvm_coremodule.c:1762: warning: unused variable ?exceptionModule?
error: command 'gcc' failed with exit status 1
[ore at localhost pypvm-0.94]$



Can anyone help me get it to work?

Thanks in advance.
- Claus Appel


From castironpi at gmail.com  Thu May 15 22:39:55 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:39:55 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
	<mailman.1200.1210896482.12834.python-list@python.org> 
	<e742ff24-d76b-422c-9284-f6eddeb1789e@34g2000hsf.googlegroups.com>
Message-ID: <715d305d-c99f-431a-945b-d79d49bf382a@k37g2000hsf.googlegroups.com>

On May 15, 7:40?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 7:07?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > > On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> > >> Why can't I write this?
> > >> --
> > >>http://mail.python.org/mailman/listinfo/python-list
>
> > > yield recieved.
>
> > > Thanks.
>
> > Should that be
>
> > ack yield
>
> > ?
>
> I'd be putting parachutes on people's screens, but on a newsgroup. ?I
> might have time-parachutes too: something that lands softer.

Does anyone want furniture put in a room?


From max at alcyone.com  Thu May  8 21:15:54 2008
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 08 May 2008 18:15:54 -0700
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <sqSdnctEu8JXOL7VnZ2dnUVZ_uidnZ2d@speakeasy.net>

wxPythoner at gmail.com wrote:

> Have a look at this:
> 
>>>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 
> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 
> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.

Others have pointed out why this is not a parse error, as it's parsed as 
-(123**0), not (-123)**0, which is apparently what you meant.

Note, however, that even normal mathematical conventions follow this 
same rule.  If you were to write

	  2
	-x

as part of a mathematical equation, this means (translated to Python) 
-(x**2), not (-x)**2.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
   I sleep and dream that life is / All beauty
    -- Lamya


From ganeshborse at gmail.com  Fri May  9 09:41:00 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Fri, 9 May 2008 06:41:00 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
Message-ID: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>

I am creating functions, the return result of which I am using to make
decisions in combined expressions.
In some expressions, I would like to inverse the return result of
function.

E.g. function contains(source,search) will return true if "search"
string is found in source string.
I want to make reverse of this by putting it as:
if ( ! contains(s1,s2) ):
     return 1

I found that "!" is not accepted by Python & compile fails with
"invalid syntax".
Corresponding to this Boolean Operator we've "not" in Python.

How can I make "not" as "!"?


From grante at visi.com  Fri May 23 10:13:38 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 23 May 2008 09:13:38 -0500
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
Message-ID: <8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>

On 2008-05-23, Peter <p.wallstedt at gmail.com> wrote:
> On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
>> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>>
>> > I have a small but rather annoying problem withpyserial. I want to
>> > open a file on disk for reading and then open a com-port, write lines
>> > from the file to the port and then read something back and compare it
>> > to the next line in the file. Should be simple. And it is, apart from
>> > the fact that the file seems to be doubled ...? Or it loops through
>> > the file twice.
>>
>> > If I exclude the "import serial" it works.
>>
>> > Any ideas?
>>
>> Your problem is in line 117 of your program.
>
> Do you have to much time?

"Do you have a sense of irony?" he asked, already knowing the answer.

-- 
Grant



From ian.g.kelly at gmail.com  Tue May  6 12:01:04 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 10:01:04 -0600
Subject: Reversing a dict?
In-Reply-To: <fvptae$2ve$1@gemini.csx.cam.ac.uk>
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<fvptae$2ve$1@gemini.csx.cam.ac.uk>
Message-ID: <3fc761710805060901y436174ecw536c70f8a00ddaa0@mail.gmail.com>

On Tue, May 6, 2008 at 9:26 AM, Jeremy Sanders
<jeremy+complangpython at jeremysanders.net> wrote:
> krumblebunk at gmail.com wrote:
>
>  > Hi - further to my earlier query regarding partial matches (which with
>  > all your replies enabled me to advance my understanding, thanks), I
>  > now need to reverse a dict.
>
>  There is no guaranteed order to the items stored in a dictionary. They can
>  and will move around as the dict is modified. Have a look at
>  diveintopython:
>
>  http://www.diveintopython.org/getting_to_know_python/dictionaries.html
>
>  You'll have to store your keys in a list or tuple to keep them ordered.

You might also take a look at the odict[1] or ordereddict[2] modules.

[1] http://www.voidspace.org.uk/python/odict.html
[2] http://www.xs4all.nl/~anthon/Python/ordereddict/


From kamhung.soh at gmail.com  Wed May 28 02:22:00 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 28 May 2008 16:22:00 +1000
Subject: convert string number to real number - ValueError: invalid  
	literal for int() with base 10: '"2"'
In-Reply-To: <491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
Message-ID: <g1itm9$rf0$1@ger.gmane.org>

David Jackson wrote:
> i used the csv module and saved its contents to a list.
> 
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
> 
> 
> the credit/debit fields are strings.
> what should i have done within the CSV module to make numbers appear as 
> numbers?
> how can i remove the quotes to make them numbers? i realize i posted a 
> solution to this once before (same posting thread) but i am thinking 
> there is a better method.

There doesn't seem to be a way to describe how specific columns should 
be processed in the csv module.  You could define a conversion function 
that "guesses" the best conversion, for example:

def str2num(datum):
  	try:
  		return int(datum)
  	except:
  		try:
  			return float(datum)
  		except:
  			return datum

for row in csv.reader(file(r'Transaction.csv')):
	[str2num(cell) for cell in row]

['Date', 'No.', 'Description', 'Debit', 'Credit']
['3/17/2006', 5678, 'ELECTRONIC PAYMENT', '', 11.449999999999999]
['3/04/2007', 5678, 'THE HOME DEPOT 263 SomeCity FL', '', 
25.399999999999999]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From quentel.pierre at wanadoo.fr  Tue May 27 11:30:22 2008
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Tue, 27 May 2008 08:30:22 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <973b4193-0d0a-4800-9e5c-3bcb0115bace@56g2000hsm.googlegroups.com>

On 25 mai, 18:58, erik.oosterw... at gmail.com wrote:
> Hi All,
>
> I have been developing websites in classic asp using VB script for a
> long while now. Due to the fact that I also took a detour to
> developing ColdFusion, and the fact the companies I work(ed) for never
> had time or money for courses, I am now in the awkward position that I
> am -still- developing classic ASP.
>
> In it, I have become quite resourceful, I wrote a framework using WSC
> (windows scripting components) to separate logic from presentation,
> and my display pages use almost no logic, except for the loops and
> variables I need to build my pages. I have a three-tier setup and all
> business logic is in separate WSC files. The framework even uses an
> ORM for access to the tables of my database. This works like a charm.
> It makes classic ASP code maintainable, it makes working in classic
> ASP very pleasant actually and it makes our customers very happy.
>
> The problem is that classic asp is now a dead language, I need to
> modernize and fast! Although the arguments some people make against it
> are not valid for me (spaghetti code, unmaintainable, slow), I still
> see that there is little to no support for it anymore.
>
> The most logical way to "update" my knowledge to something more
> modern, would be to dive into ASP.NET. I considered that for a long
> time, but there are some problems with this:
>
> 1. I love the control I have over my html using inline, template-based
> vbscript. ASP.NET's web forms really sound like a very bad idea, also
> the approach Microsoft takes in trying to make a stateless web-app
> seem like a statefull application is IMHO a burden. I think webapps
> are inherently different than desktop apps, and should be programmed
> as such.
>
> 2. Who says Microsoft isn't going to pull the plug on VB.NET in a
> while or make a drastic change like they did from asp to asp.net
> again, some time in the future?
>
> 3. I like the rapid development I can do in a dynamic, loosely typed
> language like vbscript. The performance-bottleneck of a site is mostly
> in the database-access and the http-calls and I think writing all of
> the declarations and types for a strong-typed language is overkill for
> a webapp.
>
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
>
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.
>
> As Python would be the language I prefer over Ruby, I thought I'd ask
> here to see if anyone in the Python community knows if such a
> development-framework exists in Python. For example, does IronPython
> also use the same web forms approach as asp.net using VB? The
> frameworks I looked at (Django, Pylons) seem to be able to use
> different templating engines, does that mean it's just a question of
> finding the right one?
>
> Also, for Python there is also the problem of meaningful indentation.
> I'm not even sure if it's possible to use Python directly inside HTML,
> because indentation would be at the very least tricky to maintain. I'm
> kind of hoping here that there are some solutions to these problems
> available in Python.
>
> ?Any help would be greatly appreciated.
>
> Kind regards,
>
> Erik

Hi,

You can take a look at Karrigell (http://karrigell.sourceforge.net).
It's very simple to install, stable (the first version was published
in 2002) and among the programming styles provided you will find
"Python Inside HTML" which is as close as you can get to PHP or ASP

===================
<h1>Squares</h1>
<%
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)
%>
===================

Regards,
Pierre


From jcd at sdf.lonestar.org  Mon May  5 13:44:43 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 05 May 2008 13:44:43 -0400
Subject: generator functions in another language
In-Reply-To: <cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>
	<mailman.570.1209965348.12834.python-list@python.org>
	<cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>
Message-ID: <1210009483.25126.4.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 10:08 -0700, castironpi at gmail.com wrote:
> At some point, code goes "on" and "off" the processor, which knowledge
> I do owe to spending money.  Thus, if the group news is a localcy
> (other dimension of currency), that's bounce check the house dollar.
> What do [second person plural] spend on [vernacular]? 

Sometimes I'm not sure whether castironpi is a bot or a really good
troll who wants us to think he or she is a bot.  

At any rate, somebody's having a chuckle.



From dullrich at sprynet.com  Tue May 20 06:29:45 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 05:29:45 -0500
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <hv9534p3j7veljs7ghbsfnb9d9gob82e5v@4ax.com>

On Sun, 18 May 2008 18:20:22 -0400, John Salerno
<johnjsal at NOSPAMgmail.com> wrote:

>Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)

You might get a keyboard with an Enter key, btw. Anyway:

I'm a math professor, not a programmer.
I use Python probably every day to do
all sorts of things, for example:

(i) Calculating grades. (Ok, this could be done in
Excel. But if you know Python anyway you don't need
to figure out how to do various things in Excel.
Quick: In Excel how do you take all the quiz
scores, drop the lowest _two_ of them and average
the rest? Stumps people sometimes - if you're
doing it by hand in Python it's no problem, you
just do it.)

(ii) Every semester I get a lot of emails asking
about grades. Used to be tedious typing the same
replies over and over, looking up the relevant
numbers. A littls Python script takes the student's
name, looks up the numbers and generates a reply
automatically, including a summary of the scores
and an explanation of how the grade was calculated.)

(iii) Taking various data from various places and making
it into HTML to post on the department web site.
(Please don't look - a lot of that stuff is currently
broken due to improvements on the server introduced
by other faculty. These things happen when nobody's
in charge so things get done by whoever's willing
to do them...)

(iv) Say I want to display the following system
of equations on a quiz:

  3x + 2y + z = 3
   x      - z = 1.

Writing TeX to get the variables to line
up properly can be tedious. A little Python
thingie takes lists of variable names and
coefficients and automatically produces
TeX that displays the equations exactly right.

I could go on and on - I use computers for a lot
of things, and any time I want to do something
but it's not obvious how to do it in the relevant
big program Python gets pulled out to do the job. 

A meta-example: I'm about to publish a book on 
[never mind, the topic is still secret.] Python 
has been incredibly useful in writing that book, 
in many different ways. For example:

(v) Making modifications to the text itself. For
example, the other day I finally figured out how
to make a certain aspect of the thing look right.
So I wanted to replace every "$$[w]\qed" in the
text (where [w] denotes any amount of white space)
with "\QED$$". Took about a minute to make a Python
script to go through the entire book and make the
change.

(vi) There are a lot of figures. Some fairly
complicated, illustrating fairly complicated
mathematical things. The figures are eps files
that were generated by Python scripts. The simple
ones could just have easily been done in Adobe
Illustrator or Corel Whatever, but there's no
way you're going to use a mouse-based program
like that to draw the complicated figures and
have everything in exactly the right place.
I have Python do the calculations and then
write the corresponding eps file, done.

(vii) Many magical things were done with a
combination of TeX macros and Python scripts.
For example, index entries: If I say
\index{Some Theorem} in the text and it turns
out that that's on page 37 then
"Some Theorem p.37" appears in the index;
now if something gets revised so the
\index{Some Theorem} is now on page 38 then
the index entry is automatically revised to
page 38.

Or: The first page of Chapter n+1 is supposed
to be the smallest odd number larger than the
last page of Chapter n. A Python script typesets
("texs") each chapter; after typesetting Chapter
n it looks and sees what the last page is,
figures out what the first page of Chapter n+1
should be, and modifies the code for Chapter n+1
to start on the page before typesetting it.

If I wrote this tomorrow the list of examples
would be different. Just now over on 
comp.text.tex I showed someone a Python solution
to a problem he had. I don't know if he's going 
to use it - he _would_ need to learn a _little_
Python first. But it's what I'd use if _I_ wanted
to solve the problem! Other people suggested various
programs available that would solve his problem
for him - writing a little Python to give the
solution took less time than downloading one
of those programs would have.

>Thanks.

David C. Ullrich


From afilash+python at gmail.com  Thu May 22 08:57:40 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Thu, 22 May 2008 18:27:40 +0530
Subject: can someone with guessing a number
In-Reply-To: <5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
	<9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
	<5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>
Message-ID: <9f9d35df0805220557xfc858a7md4e6063ff9287c06@mail.gmail.com>

Gary,
  There is a problem in using this sys.exit()
if you are working in windows IDLE, then it will ask you for an 'exit
altogether'

so either change your 'while' clause or restructure your whole program to
fit your idea :-) to avoid failed and success messages together

cheers ,
abhilash

On Wed, May 21, 2008 at 10:35 PM, Dan Upton <upton at virginia.edu> wrote:

> On Wed, May 21, 2008 at 12:55 PM, abhilash pp <afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
> wrote:
> >> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
> >>>
> >>> I would just like the program to exit after guessing the amount of
> >>> numbers wrong
> >>>
> >>> # Guess My Number
> >>> import random
> >>> the_number = random.randrange(100) + 1
> >>> tries = 1
> >>> # guessing loop
> >>> while (guess != the_number):
> >>>     if (guess > the_number):
> >>>         print "Lower..."
> >>>     else:
> >>>         print "Higher..."
> >>>
> >>>     guess = int(raw_input("Take a guess: "))
> >>>     tries += 1
> >>>     if tries > 10:
> >>>         print 'you failed- give up'
> >>>
> >>> print "You guessed it!  The number was", the_number
> >>> print "And it only took you", tries, "tries!\n"
> >>>
> >>> raw_input("\n\nPress the enter key to exit.")
> >>>
> >>> many Thanks
> >>> --
> >>> http://mail.python.org/mailman/listinfo/python-list
> >>
> >     if tries > 10:
> >         print 'you failed- give up'
> >         break
> > <------------------- use this
> >
>
> That won't work as written, because it'll print "you failed," then
> break, then print "You guessed it!"...
>
> As an alternative to what I suggested before, if you really just want
> to end the program, you could also do
>
> from sys import exit
>
> <rest of code>
>
>    if tries > 10:
>        print 'you failed- give up'
>         exit()
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Tue May 20 10:04:56 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 14:04:56 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<69fbjvF2uih6aU6@mid.uni-berlin.de>
Message-ID: <Xns9AA4989662957duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:
> 
>> 2.  It is not clear to me how a python web application scales.
> 
> Ask YouTube.  :-)

Or look at Google appengine where unlike normal Python you really are 
prevented from making good use of threading.

Google App Engine takes an interesting approach by forcing the programmer 
to consider scalability right from the start: state is stored in a 
distributed database which cannot do all the hard to scale things that SQL 
databases do. This means that you have to work as though your application 
were spread on servers all round the world from day 1 instead of waiting 
until the structure that was 'good enough' is threatening to kill your 
business before you address them.

It also puts strict limits on how much a single web request can do, so 
again you have to work from day 1 to make sure that page requests are as 
efficient as possible.

In return you get an application which should scale well. There is nothing 
Python specific about the techniques, it is just that Python is the first 
(and so far only) language supported on the platform.

-- 
Duncan Booth http://kupuguy.blogspot.com


From Sam.Dutton at itn.co.uk  Sun May 25 04:41:55 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Sun, 25 May 2008 09:41:55 +0100
Subject: finding icons for Apps
Message-ID: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>

http://tango.freedesktop.org/

..as used by OpenOffice, Gimp, Pidgin (Gaim), etc.

However, if you only need a few basics (Save, Print, etc.) just use the 'standard' for the platform. Whatever you do, don't mix different styles of icon.

Note that for Windows the application icon (the thing you see on the Desktop or in a folder) is done as an .ico file, which has multiple sizes in the same file. You'll need to create this in an editor such as Visual Studio.

Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
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From wuwei23 at gmail.com  Thu May 29 09:32:29 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 06:32:29 -0700 (PDT)
Subject: Tuple of coordinates
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <cb39f9e3-899d-4365-b306-1cca132ee495@u36g2000prf.googlegroups.com>

On May 29, 10:16 pm, "victor.hera... at gmail.com"
<victor.hera... at gmail.com> wrote:
> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>      for j in (beg, end, step):
>           for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>
> Victor

>>> coords = [(x,y,z) for x in range(0,10) for y in range(0,10) for z in range(0,10)]



From stefan_ml at behnel.de  Fri May 23 03:22:06 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 23 May 2008 09:22:06 +0200
Subject: where is the Write method of ElementTree??
In-Reply-To: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
Message-ID: <4836709E.6000003@behnel.de>

gray.bowman at gmail.com wrote:
> I'm messing around with trying to write an xml file using
> xml.etree.ElementTree.  All the examples on the internet show the use
> of ElementTree.write(), although when I try to use it it's not
> available, gives me ...
> 
>    ElementTree(sectionElement).write("section.xml")
> TypeError: 'module' object is not callable

I guess you did

    from xml.etree import ElementTree

Then you should do this:

    ElementTree.ElementTree(sectionElement).write("section.xml")

sadly, the module names in ET are upper case and look like classes...

Stefan


From ivan.illarionov at gmail.com  Thu May  1 13:07:28 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 17:07:28 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
Message-ID: <fvctcg$31i9$1@news.mtu.ru>

On Thu, 01 May 2008 11:11:29 -0500, Jon Ribbens wrote:

> On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>> IMO .ini-like config files are from the stone age. The modern approach
>> is to use YAML (http://www.yaml.org).
> 
> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and so
> comprehensively and completely fails to achieve its stated main goal of
> being "readable by humans", that I had assumed it was an April Fool
> along the lines of Intercal or brainf***.
> 
> I certainly wouldn't recommend it as being suitable for, well, anything
> at all.
> 
> Or were you trolling and I missed the joke? ;-)

No, it isn't. I acually find it usefull and readable. I don't think that 
programmers at Google would use something that is a joke. 

I used XML files before for this purpose and found YAML much easier and 
better suitable for the task.

Please explain why don't like YANL so much?

PS. Your reply remind me of early days of Python when Perl programmers 
said exacly the same thing about Python.

-- 
Ivan




From tonal at promsoft.ru  Thu May 15 23:46:33 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Fri, 16 May 2008 10:46:33 +0700
Subject: ?
In-Reply-To: <51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
Message-ID: <482D0399.5090804@promsoft.ru>

urikaluzhny wrote:
>> | It seems that I rather frequently need a list or iterator of the form
>> | [x for x in <> while <>]
>> I can think of two ways to interpret that.
> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> the expression <B> is false.
How do you plan to modify B during iteration?
May be
[x for x in itertools.takewhile(<B>, <A>)]
when <B> function accept element <A> and return True or False




From tjreedy at udel.edu  Mon May 12 22:38:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 22:38:10 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local><mailman.1008.1210635369.12834.python-list@python.org>
	<e0ea51fe-7279-434b-9e21-c15554624003@2g2000hsn.googlegroups.com>
Message-ID: <g0auuf$lb7$1@ger.gmane.org>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:e0ea51fe-7279-434b-9e21-c15554624003 at 2g2000hsn.googlegroups.com...
On May 12, 7:35 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Ohad Frand" <ohad.fr... at percello.com> wrote in message
>
> news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
> | I am looking for a way to programmically get a list of all python
> | existing statements that I cannot access by __builtins__ or locals()
> | (like ["assert","break","class",...])
>
> You appear to want the keywords that begin statements. Look at the 
> keyword
> list in the language reference and pick those you want. Then build that
> list into your program.

Someone already did it:

import keyword
print keyword.kwlist
=========================

I forgot about that.  However, I got the impression that the OP wants a 
subset, and if so, *that* will require hand selection. 





From kris at FreeBSD.org  Thu May 29 18:10:22 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Fri, 30 May 2008 00:10:22 +0200
Subject: UNIX credential passing
Message-ID: <483F29CE.7060104@FreeBSD.org>

I want to make use of UNIX credential passing on a local domain socket 
to verify the identity of a user connecting to a privileged service. 
However it looks like the socket module doesn't implement 
sendmsg/recvmsg wrappers, and I can't find another module that does this 
either.  Is there something I have missed?

Kris


From castironpi at gmail.com  Tue May 13 10:45:32 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:45:32 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <baeabd42-1edd-4eb0-8481-adc7bdeb6f12@m3g2000hsc.googlegroups.com>

On May 13, 9:34?am, hdante <hda... at gmail.com> wrote:
> On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > Don't let yourself be irritated by castironpi
>
> > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > interaction.
>
> > Not this interaction, I'm afraid. ?What irritates *me* about
> > castironpi is that he uses a chatterbot to clutter up the threads
> > here. ?If you go back to his postings from a year ago (and selected
> > ones since), his comments are coherent and sensible. ?These rambling
> > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > his idea of a joke. ?But they are certainly not worth your time in
> > trying to respond to them.
>
> > -- Paul
>
> ?I don't think castironpi so annoying that I should filter its
> messages. It would be enough if he were better tuned. He is much
> smarter than the emacs shrink, for example. :-P
>
> ?The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.- Hide quoted text -
>
> - Show quoted text -

What is a tank a tank of?  Even if it does, developer communities are
willing to sustain it.  That's a pretty colinear judgement, that I
find the community sustainable.  Does anyone commute to out of
control?  What is to out?  No jumping down thrown.  Tut tut.


From martin at v.loewis.de  Sat May 10 02:55:59 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 08:55:59 +0200
Subject: RELEASED Python 2.6a3 and 3.0a5
In-Reply-To: <90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>
References: <mailman.820.1210290618.12834.python-list@python.org>
	<90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>
Message-ID: <482546ff$0$14157$9b622d9e@news.freenet.de>

> I'm trying to install on the latest Ubuntu (8.04) and the following
> extension modules fail:
> 
> _bsddb, _curses, _curse_panel, _hashlib, _sqlite3, _ssl, _tkinter,
> bz2, dbm, gdbm, readline, zlib
> 
> All of them except for _tkinter are included in the preinstalled
> Python 2.5.2, so I guess the dependencies must be somewhere there.
> Does Ubuntu have any non-standard lib dir ?

You need to manually install the -dev packages (through aptitude)
before building Python.

Regards,
Martin


From bellman at lysator.liu.se  Tue May 20 10:38:01 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 14:38:01 +0000 (UTC)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
	<m2lk247vdd.fsf@googlemail.com>
Message-ID: <g0uno9$i5i$1@news.lysator.liu.se>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> from collections import defaultdict
> d = defaultdict(int) # That means the default value will be 0
> for person in people:
>     d[person.fav_food] += 1

Ah!  I didn't think of using int as the factory function.  If you
use this, then I believe the warning I gave about performance
does not apply; my understanding is that calling built-in functions
(like the int constructor) is fast.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"Beware of bugs in the above code; I have    !  bellman @ lysator.liu.se
 only proved it correct, not tried it."      !  Make Love -- Nicht Wahr!


From bj_666 at gmx.net  Fri May  2 02:48:06 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 06:48:06 GMT
Subject: no cleanup on TERM signal
References: <WSwSj.236857$pM4.38686@pd7urf1no>
Message-ID: <67vrp6F2r409aU1@mid.uni-berlin.de>

On Fri, 02 May 2008 04:36:06 +0000, Yves Dorfsman wrote:

> x.del() gets executed if:
> -I del x, then run gc.collect()
> -simply exit the script
> -get the script to abort on an exception
> 
> But if I kill it with the default signal TERM, the script dies, but I don't 
> get the message, so I am assuming that python isn't taking the time to 
> cleanup, even though that is (was) what TERM was intended for.
> 
> Has this been discussed before ? Is worth a suggestion (PEP) ?

There is the docs for `__del__()` saying this method is not guaranteed to
be called at all.  Don't use it if you *need* that method to be called. 
Just like `finalize()` in Java, it can't be used for deterministic
destruction, so it's not that useful after all.

Ciao,
	Marc 'BlackJack' Rintsch


From wuwei23 at gmail.com  Tue May 27 00:32:04 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 21:32:04 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <13c751dd-6a86-4e53-a389-9515b9e95494@x19g2000prg.googlegroups.com>

On May 27, 12:46 pm, notnorweg... at yahoo.se wrote:
> what do i need to do?

Ideally, you need to read some introductory material and stop
offloading whatever the hell it is you're doing to this group.


From castironpi at gmail.com  Sun May  4 07:22:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 04:22:31 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
Message-ID: <7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>

On May 4, 12:33?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > Is there a good place to look to see where I can find some code that
> > will help me to save webpage's links to the local drive, after I have
> > used urllib2 to retrieve the page?
> > Many times I have to view these pages when I do not have access to the
> > internet.
>
> Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> --
> Gabriel Genellina

A lot of the functionality is already present.

import urllib
urllib.urlretrieve( 'http://python.org/', 'main.htm' )
from htmllib import HTMLParser
from formatter import NullFormatter
parser= HTMLParser( NullFormatter( ) )
parser.feed( open( 'main.htm' ).read( ) )
import urlparse
for a in parser.anchorlist:
    print urlparse.urljoin( 'http://python.org/', a )

Output snipped:

...
http://python.org/psf/
http://python.org/dev/
http://python.org/links/
http://python.org/download/releases/2.5.2
http://docs.python.org/
http://python.org/ftp/python/2.5.2/python-2.5.2.msi
...


From duncan.booth at invalid.invalid  Fri May 16 10:14:47 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 May 2008 14:14:47 GMT
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <Xns9AA09B0D4F874duncanbooth@127.0.0.1>

rocco.rossi at gmail.com wrote:

> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
> 
> foo = some_function("foo")
> 
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
> 
> Thank you.
> 

 vars()["foo"]

but if you are doing this you are almost certainly making your life harder 
than it needs to be. Usually you really just want to keep the values in a 
dict.

-- 
Duncan Booth http://kupuguy.blogspot.com


From gneuner2/ at /comcast.net  Fri May  2 05:03:59 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Fri, 02 May 2008 05:03:59 -0400
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<9pof14t22rpq24219q0an2748i5f054qr4@4ax.com>
	<88273bc8-5152-4dfd-9f96-1d6ee2b83f99@e53g2000hsa.googlegroups.com>
	<op.uae6cwlgut4oq5@pandora.alfanett.no>
Message-ID: <h1ml14tsjh4dgd3dd097fnc0d7sqod1dge@4ax.com>

On Wed, 30 Apr 2008 12:35:10 +0200, "John Thingstad"
<jpthing at online.no> wrote:

>P? Wed, 30 Apr 2008 06:26:31 +0200, skrev George Sakkis  
><george.sakkis at gmail.com>:
>
>>
>>        \|||/
>>          (o o)
>> ,----ooO--(_)-------.
>> | Please            |
>> |   don't feed the  |
>> |     TROLL's !     |
>> '--------------Ooo--'
>>         |__|__|
>>          || ||
>>         ooO Ooo
>
>Doesn't copying Rainer Joswig's troll warning constitute a copywright  
>infrigment :)

It's not an exact copy of Rainer's so it may be arguable whether it
violates his copyright.  Might have more luck with a trademark
argument - distorted marks may still infringe.

George
--
for email reply remove "/" from address


From jkugler at bigfoot.com  Fri May 16 16:08:24 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Fri, 16 May 2008 12:08:24 -0800
Subject: IDE for Python
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
Message-ID: <g0kpjo$5hd$1@ger.gmane.org>

Jonathan Barbero wrote:
>  I?m newbie with Python and to learn it better I want to use a good IDE to
> concentrate on Python power. There is any IDE like Eclipse for Java for
> Python? If not, what is the best Python?s IDE for you?

This is an EFAQ (extremely frequently asked question).

http://www.google.com/search?hl=en&q=python+ide+site%3Amail.python.org%2Fpipermail%2Fpython-list%2F&btnG=Google+Search

j



From aspersieman at gmail.com  Mon May 26 12:42:12 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 26 May 2008 18:42:12 +0200
Subject: IOError in windows service
In-Reply-To: <op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <483A85C6.20803@gmail.com>
	<op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <483AE864.3000708@gmail.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080526/5866e6dd/attachment.html>

From workitharder at gmail.com  Fri May 23 16:17:28 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 13:17:28 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
	<p%EZj.19189$255.2014@bignews8.bellsouth.net>
Message-ID: <ce386e5a-514e-4faf-a679-138f14f9a7e4@t54g2000hsg.googlegroups.com>

On May 23, 12:35 pm, "inhahe" <inh... at gmail.com> wrote:
> "
> I wish this worked:>>> def main(a,b,*argv): pass
> >>> options['argv'] = argv
> >>> main(**options)
>
> TypeError: main() got an unexpected keyword argument 'argv'
> "
> -----
> I was thinking about that exact same thing actually.  Except that I was
> thinking you might want it like this, otherwise it could be ambiguous:
>
> >>> def main(a,b,*argv): pass
> >>> options['*argv'] = argv
> >>> main(**options)
>
> Weird I know, to put the * operator inside the string.  I suppose the
> necessity of doing that just shows why it wasn't implemented in the first
> place.  But still, it would be neat...
>
> Also, of course, you could then do
> main(*argv=[2,3])
>
> or rather
>
> main(*argv=[3,4],a=1,b=2) #in random order

Yes I think something like that would be an improvement. I wonder if
anyone would help me write a PEP... It might not be too hard to pass
since it would be compatible with all existing code. I'd be willing to
produce a patch against python2 or py3k.

I don't see that leaving off the * makes it ambiguous, since there can
only be one argument with that name:
def f(args, *args): pass
SyntaxError: duplicate argument 'args' in function definition


From jeffober at gmail.com  Fri May  2 15:50:51 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:50:51 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org> 
	<481B27D9.3000107@behnel.de>
	<eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>
Message-ID: <286490d5-01ce-40c5-8965-9e3da4fea1c9@w74g2000hsh.googlegroups.com>

Use lisp?


From gherron at islandtraining.com  Tue May 13 04:10:59 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 01:10:59 -0700
Subject: question about python statements
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>
Message-ID: <48294D13.4020600@islandtraining.com>

Ohad Frand wrote:
> Hi Gary
>
> Sorry that I was not clear, I hope that this time I will explain myself
> better.
>
> I can get list of all builtin functions in python by dir(__builtins__).
> This return a list of string with most known names to python language
> such as: 
> [... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
> 'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow', 'property',
> 'quit', 'range', 'raw_input', 'reduce', 'reload'...]
>
> But I don't know how to generate the next list of builtin python
> statements:
> ['assert','break','class','continue','def','del','elif','else','except',
> 'exec','finally','for','from','global',
> 'if','import','pass','print','raise','return','try','while','yield']
>   

There is no way you can consider 'elif', 'else', 'except', and 'from' 
statements.  However, as someone pointed out, the kwlist from the 
keyword module is the closest thing we can think of to the list you are 
asking for.

On the other hand, what's wrong with constructing the list as you did in 
your example above?


Just out of curiosity, *why* do you want this list.   Perhaps is we knew 
that, we could think of a programmatic way to construct the list you 
want.   The biggest challenge at the moment is that we have no idea what 
you mean by statement, but it is certainly not what Python considers 
statements.

Gary Herron



> Thanks,
> Ohad Frand
>
> -----Original Message-----
> From: Gary Herron [mailto:gherron at islandtraining.com] 
> Sent: Monday, May 12, 2008 10:41 PM
> To: Ohad Frand
> Cc: python-list at python.org
> Subject: Re: question about python statements
>
> Ohad Frand wrote:
>   
>> Hi
>>
>> I am looking for a way to programmically get a list of all python 
>> existing statements that I cannot access by __builtins__ or locals()
>>
>> (like ["assert","break","class",...])
>>
>> Thanks,
>>
>> Ohad
>>
>>
>>     
> ------------------------------------------------------------------------
>   
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>     
> Sorry, I've no idea what you mean here. Perhaps you could help us by 
> defining what you mean by
> "statements that I cannot access by __builtins__ or locals()"
>
> Is there any statement that you *can* access in such a way?
>
> What does it even mean to "access a statement"?
>
> Do you even have a list of "statements" from which we are to work? 
> Python is a little unusual in what it considers statements.
>
> Gary Herron
>
>
>
>
>   



From casey.mcginty at gmail.com  Fri May 30 02:01:29 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Thu, 29 May 2008 20:01:29 -1000
Subject: Code execution in imported modules
In-Reply-To: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>
References: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>
Message-ID: <ae3f58470805292301r253fc63ay45907190d525ab1@mail.gmail.com>

On Thu, May 29, 2008 at 2:43 PM, Eric Wertman <ewertman at gmail.com> wrote:

> So I'm working on some file parsing and building up a stack of regular
> expressions that I need to use.  I was thinking of dropping them in an
> external module.  I was wondering.. if I put them in a file called
> regex.py like so :
>
> import re
>
> re1 = "..
> re2 = "..
>
> and then do:
>
> rgx1 = re.compile(re1)
> rgx2 = re.compile(re2)
>
>
> and, in my script, parse.py py I do:
>
> from regex import *
>
> text = "bunch of stuff......."
>
> m = rgx1.search(text)
>
>
> Does the re get compiled when I import it, or every time I call it?
> Since I'm calling it often, I'd like to compile it once.
>
> Thanks!
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Please correct me if I am wrong ...
but I believe this should work, and rgx's will only be compiled on the first
import. You could also place them in a class and get the same effect when
you instantiate the class.

class MyRegEx( object ):
    re1 = "..
    re2 = "..
    rgx1 = re.compile(re1)
    rgx2 = re.compile(re2)
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From ivan.illarionov at gmail.com  Wed May 14 02:01:02 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 23:01:02 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <8bf1efe4-4165-4cee-ae77-cd25a6f36c1e@w7g2000hsa.googlegroups.com>

On 13 ???, 21:10, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Hi, Rajarshi,

Besides the above comments, I want to highlight Django and other
Python web frameworks and their ability to build simple dynamic web
sites extremely fast.
http://www.djangoproject.com/

-- Ivan


From fiacre.patrick at gmail.com  Fri May 23 01:26:30 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:26:30 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <48365587$0$11637$607ed4bc@cv.net>

cm_gui wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
> 
> I've yet to see a web application written in Python which is really
> fast.

So --- don't use Google

* shrug *


Personally I find PHP to be a hideous language -- it has only one use. 
It is Perl for people who can be bothered to learn a general purpose 
programming language and just write web applications.

Python is a general purpose programming language ... it does web nicely 
(Django and pylons!), it supports real OOP and OOD, it's extensible, it 
has a smart set of libraries, intelligent and coherent interfaces, it 
sails across platforms, it has at least one great ORM (SQLAlchemy) and I 
keep discovering new cool things about the language as a recent convert 
that make me wonder why I would ever write another large application in 
Perl or Java.


I find Zope to be a mess and it gives me a headache ... but it Zope is 
an *application framework*, not a *programming language*.  So, I think 
you are barking up the wrong straw man (if I may mix metaphors).

But that's just my $0.02.


From saluk64007 at gmail.com  Mon May 26 01:40:33 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 22:40:33 -0700
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <c3f69bf60805252240y49b4167t2784e22339df9011@mail.gmail.com>

Here is a quick, ugly way you can easily hide data, although persistent
clients can still bypass it.  x.__dict__ is ugly, though not any uglier than
x.__Ugly__Internal__Variable__Do__Not__Set

Another option would be to use another structure, such as a dictionary or
list, and store variables in there proxying to it from get/set functions (or
__getattr__ __setattr__).  Or just don't document this.

class HideTest(object):
    def __init__(self):
        self.__dict__["beans"] = 5
    def __setattr__(self,key,val):
        if key == "beans":
            raise Exception("Cannot set this attribute")
        return super(HideTest,self).__setattr__(key,val)

b = HideTest()
print "b.beans is",b.beans
try:
    b.beans = 5
except:
    print "Cannot set"


Also the point of underscore rules have never been to keep clients from
accessing variables.  Read about them in PEP8:
http://www.python.org/dev/peps/pep-0008/

They are primarily to handle specific name conflict situations, and
secondarily to inform users when they might be mucking about with something
at a lower level.  Using a keyword could work I suppose for the module-level
convention, as well as for the name mangling.  Implementation wise it seems
a bit tricky to use keywords for this.  For the purposes of informing users
however, keywords versus underscore is a terrible idea.  dir() as is makes
it clear, with underscores, which variables are safe to use and which are
potentially dangerous.  Rewriting dir() to print extra information about
names seems incredibly problematic as well.  I really like the idea of
having variables that may be unsafe to use but I can still use them if I
want to, and the underscore rules are the most clean way I can see for this
purpose (not to mention all of the history).  I agree that they do look ugly
of course.  I also tend not to use them in my code as well.

This has been brought up so many times before, and turned down again and
again.  Working around it as best you can is your best bet, especially since
a major change like this could never happen until well after python 3.0.
(Who knows how long it will take before 3.0 is fully adopted enough to move
on from that)
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From s0suk3 at gmail.com  Sun May  4 07:18:22 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 04:18:22 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
Message-ID: <e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>

On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
> I had previously ran the import line. I prepended it to the example
> code I'm trying to run every time but it did not help, still nothing
> happens. With or without var before 'root'. I'm pasting the code in
> IDLE and using Windows XP as written in the first post.
>

Tkinter doesn't work if you type the statements in IDLE. I don't
remember the specifics of it, but essentially it doesn't work because
IDLE is itself a Tkinter app. You have to type it at the Python
command line or save it in a file. BTW, if you're on Windows, you
should definitely check wxPython. I used to work with Tkinter,
struggling with it all the time only to get a lame result most of the
time. Then I switched to wxPython, and in the same week I was learning
it I did a better GUI than I ever did in Tkinter (with months of
work!). I feel it makes it easier to make your program have a better
structure and design, and thus lets you focus on the actual task of
the program, rather than in the GUI itself. Plus, on Windows, you'll
get the widgets to look more natively, like any good quality
application there is on Windows.


From timr at probo.com  Wed May 14 02:17:56 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 14 May 2008 06:17:56 GMT
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
Message-ID: <go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>

globalrev <skanemupp at yahoo.se> wrote:
>
>and when the program get skiled because out of memory all this will be
>deleted from the memory?

Yes.  When a process is killed, all of the memory it was using is released.

>so there is no way that you can, by accident, fill your whole
>harddrive and make it unusable?

Of course not.  Where do you see a connection between memory and your hard
drive?

Now, you can certainly fill your hard drive by running your little infinite
loop application and storing the results in a file:
    python looper.py > saveme.txt
but I hope it is clear to you that this can't damage any of the data you
already have.

>and RAM-memory always get cleaned out when not used i guess?

It gets released so that it can be re-used.  I don't know what you mean by
"cleaned out".  Remember that most of the systems where Python runs are
virtual memory systems, so even if one application is using a couple of
gigabytes of memory, other applications are still able to run.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py2 at yahoo.com.ar  Fri May  9 02:24:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:24:06 -0300
Subject: Python script freezed on Window DOS terminal
References: <95455e980805082142w7891868fy89da4c0be6659246@mail.gmail.com>
Message-ID: <op.uaviqgc8x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:42:21 -0300, hce <webmail.hce at gmail.com> escribi?:

> I am running Python and a script on XP DOS terminal, the script
> build.py printed out messages on the Terminal, then asked for an input
> of numbers. But, I pressed a key, nothing came in DOS terminal,
> Eventually, no key active and seem the DOS terminal is freezed. I
> could not even terminate the terminal by Ctrl-C or Ctrl-D. The same
> script was running fine on linux or Cygwin terminals. Any thoughts
> what was the problem?

Next time try with Ctrl-Break.
It's hard to say what's wrong without seeing the script.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Sat May  3 16:57:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 21:57:29 +0100
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <m2r6cjksw6.fsf@googlemail.com>

dave <squareswallower at y1a2hoo3.com> writes:

> Hello,
>
> here is a piece of code I wrote to check the frequency of values and
> switch them around to keys in a new dictionary.  Just to measure how
> many times a certain key occurs:
>
> def invert(d):
> 	inv = {}
> 	for key in d:
> 		val = d[key]
> 		if val not in inv:
> 			inv.setdefault(val, [key])
You can simply write:
                        inv[val] = [key]
> 		else:
> 			inv[val].append(key)
> 	return inv
>
>
> Using the methods above (I'm just a beginner) could I have written it
> more concisely?  Any criticism/critique in the code would be greatly
> appreciated.

Apart from the unnecessary use of setdefault, it looks good to me.

* You could change if 'val not in inv:' to 'if val in inv:' (and swap
  the if and else clauses of course) in order to have a positive
  condition rather than a negative one
 
* If you want to use setdefault, you can replace the if .. else
  construct by:

               inv.setdefault(val, []).append(key)

* You can also iterate over keys and values using the items() or
  iteritems() method of dictionaries:

def invert(d):
    inv = {}
    for key, val in d.iteritems():
        inv.setdefault(val, []).append(key)
    return inv

-- 
Arnaud


From torriem at gmail.com  Thu May  1 12:52:33 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 10:52:33 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <4819F4A5.4010302@gmail.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
	<4819F4A5.4010302@gmail.com>
Message-ID: <4819F551.4080501@gmail.com>

Michael Torrie wrote:
> The second example, x = Integer.fromString('5') demonstrates a huge
> weakness in Java.  

Ahem.  Javascript.  Sorry.


From phil at freehackers.org  Tue May  6 10:38:06 2008
From: phil at freehackers.org (BlueBird)
Date: Tue, 6 May 2008 07:38:06 -0700 (PDT)
Subject: How to generate binary python?
References: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com> 
	<mailman.627.1210048209.12834.python-list@python.org>
Message-ID: <65aa8695-ec87-44a5-9ee1-e4c58000a66c@m73g2000hsh.googlegroups.com>

On May 6, 6:29 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 05 May 2008 19:43:24 -0300, David Anderson <zerty.da... at gmail.com>
> escribi?:
>
> > Hi, i'm comingo from Java and I'm wanting to know what in Python is the
> > equivalent to the file.class in java, I am producing some apps that ar
> > not
> > open source, so I would like to share only the binaries, Both for Windows
> > and for Linux, Can you suggest me anything?
>
> .class files map roughly to .pyc files
> Note that Python generates and writes .pyc files automatically when you
> import a module, but not for the main script being executed.
> The standard way to generate a binary distribution is using distutils, see
> the Python wiki at <http://wiki.python.org/moin/DistributionUtilities>
>

You can have a look at the following page for a very very short
comparison of the different solutions available today:
http://www.freehackers.org/Packaging_a_python_program


From parag_paul at hotmail.com  Thu May  8 03:30:53 2008
From: parag_paul at hotmail.com (parag_paul at hotmail.com)
Date: Thu, 8 May 2008 00:30:53 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
	<fvsj6s$n87$1@ger.gmane.org>
	<mailman.711.1210178170.12834.python-list@python.org>
Message-ID: <2d7d65f9-9f3e-4ed4-be32-b3c3c21d58a7@b1g2000hsg.googlegroups.com>

On May 7, 9:35?pm, Max Erickson <maxerick... at gmail.com> wrote:
> WolfgangZ <wol... at gmx.net> wrote:
> > parag_p... at hotmail.com schrieb:
> >> hi All,
> >>http://mail.python.org/mailman/listinfo/python-list
>
> > At least I'm living in a free country and nobody forces me to
> > learn python. So I don't fully understand why you HAVE TO learn
> > it. When your problems can be solved in a different programming
> > language than you should be free to use whatever you like. And
> > also why should it be forbidden to create a new programming
> > language? Diversity and competition is usually not bad.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> I imagine that there is some English as a second language getting
> involved and the intent of the question was more like "What is
> python useful for on Windows?", which has pretty much the same
> meaning but is open to a slightly friendlier interpretation(i.e.,
> tell me how I can use python instead of tell me why I should use
> python).
>
> The other question might be more like "I already know VBS, what do I
> gain by learning python?".
>
> (the answers could be "lots of things, including full applications"
> and "among other things, you can use it on other platforms, and you
> might prefer the syntax".)
>
> max

thanks to all,
Can you all forward me some sites where there may examples of work
done on Python and that which I amy bring into some application


From python at rcn.com  Fri May 30 22:16:08 2008
From: python at rcn.com (Raymond Hettinger)
Date: Fri, 30 May 2008 19:16:08 -0700 (PDT)
Subject: How to add function return value
References: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>
Message-ID: <7d89a189-1ce9-46d3-b200-2ad86858fa45@h1g2000prh.googlegroups.com>

On May 30, 6:21?pm, HYRY <ruoyu0... at gmail.com> wrote:
> Can I write a decorator that it can automately do this conversion
>
> def func1()
> ? ? a = 1
>
> --->
>
> def func1():
> ? ? a = 1
> ? ? return locals()

Not sure why you would want to do this, but there are several ways.

1. Make bytecode hack decorator that transforms the final "return
None" into "return locals()".  A recipe that shows the basic technique
is at: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277940

2. Retrieve the source using inspect.getsourcelines(f). Then, append a
"return locals()" to the end of the function and run it through exec.

3. Try hacking a tracing/debugging utility.

4. Run the sourcefile through tokenize, make the appropriate
insertion, and then untokenize.

 . . .

Raymond


From castironpi at gmail.com  Fri May 16 18:57:52 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:57:52 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com> 
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>
Message-ID: <2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>

On May 16, 5:22?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
>
>
>
>
> > globalrev wrote:
> > > i ahve a program that takes certain textsnippets out of one file and
> > > inserts them into another.
>
> > > problem is it jsut overwrites the first riow every time.
>
> > > i want to insert every new piece of text into the next row.
> > > so:
> > > 1. how do i write to a new line every time i write to the file?
>
> > > 2. if i dont want to write to a new line but just want to insert it
> > > after the last token in the file, how do i do then?
>
> > Generally, you can't "insert" anything into a file. ?You can either
> > append to the end of a file, or you can rewrite the whole file. ?It
> > sounds like you probably want to read the file into an array using
> > readlines(). ?Then manipulate that array however you want--appending
> > and inserting--and when you are done, overwrite the file with your
> > array.
>
> > However, you should be aware that as soon as you open a file for
> > writing all the data is erased, and if your program should happen to
> > crash right then, the array containing the data will disappear into
> > the ether and your file will be empty--in other words all your data
> > will be gone. ?To prevent such an occurence, you should write your
> > final data to another file, then delete the original file, and finally
> > change the other file's name to the original file name.
>
> Some options:
>
> 1. ?Limit line length. ?Then offset is ( line* length ).
> 2. ?Name your relation.
> 3. ?Hijack the operating system. ?Remember:
>
> abc
> def
>
> on disk looks like
> abc\ndef
>
> where
>
> abcd
> def
>
> looks like
> abcd\ndef
>
> So, if you want line 2, you have to scan line 1.- Hide quoted text -
>
> - Show quoted text -

You also have

f.seek( X )
f.write( 'abc' )

which writes 'abc' in the middle, at offset X.

f.seek( 0, SEEK_END )

takes you to the back, and don't forget

f.flush( ).

Say you have:

File:

abc
def
ghi

Symbols:

0-3
1-3
2-3

abcdefghi

and you want to make abc abC.  Then

f.seek( 2 )
f.write( 'C' )

does work.

If you want to make abc ab, then you change a different file

table.seek( 0 )
table.write( chr( 2 ) )

( or bytes( [ 2 ] ) in 3.0 ).

If you want to make abc abcd, then you change both.

f.seek( 9 )
f.write( 'd' )

table.seek( 0 )
table.write( chr( 4 ) )

But.  Now you have item 0 in two places.  'abc' somewhere and 'd'
somewhere else, at 0 and at 9 respectively.  I think the file system
overallocates room for String 1.  You would read:

0- 2- [ 3, 1 ]

for 'abc'+'d'

and

1- 1- [ 3 ]
2- 1- [ 3 ]

for 'def' and 'ghi', where actual representations would be:

0- 2- [ 0/3, 9/1, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]

As your chains start to grow, leave table 8xN, and just copy strings
to new sectors when they become long:

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]

You can insort in linear time when you're looking for available slots.

'jklm' can't fit at 0.

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]

but 'nop' can.

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
4- 1- [ 0/3, 0, 0, 0, 0, 0, 0, 0 ]

'jklm' could've with a split:

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]

and with 'nop':

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
4- 1- [ 14/3, 0, 0, 0, 0, 0, 0, 0 ]

There's an easy chance you can beat DbfilenameShelf for your
application.


From alefnula at gmail.com  Fri May  9 08:25:57 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 05:25:57 -0700 (PDT)
Subject: Function creation (what happened?)
Message-ID: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>

Can somebody give me an explanation what happened here (or point me to
some docs)?

Code:

HMMM = None

def w(fn):
    print 'fn:', id(fn)
    HMMM = fn
    print 'HMMM:', id(HMMM)
    def wrapper(*v, **kw):
        fn(*v, **kw)
    wrapper.i = fn
    print 'wrapper:', id(wrapper)
    return wrapper

class A:
    @w
    def __init__(self): pass

print 'A.__init__:', id(A.__init__)
print 'A.__init__.i:', id(A.__init__.i)
print 'HMMM:', id(HMMM)



Output:

fn: 10404208
HMMM: 10404208
wrapper: 10404272
A.__init__: 10376136
A.__init__.i: 10404208
HMMM: 505264624



Why did HMMM changed his id?!


From gherron at islandtraining.com  Fri May 23 02:57:56 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 22 May 2008 23:57:56 -0700
Subject: Calling class method by name passed in variable
In-Reply-To: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
Message-ID: <48366AF4.7030106@islandtraining.com>

Sagari wrote:
> Greetings,
>
> Can someone suggest an efficient way of calling method whose name is
> passed in a variable?
>
> Given something like:
>
> class X:
> #...
>   def a(self):
> # ...
>
>   def b(self):
> # ...
>
> #...
>
> x = X()
> #...
> v = 'a'
>
> How do I call the method of x  whose name is stored in v?
>   

Use getattr (stands for get attribute) to do this.

    fn = getattr(x, v)  # Get the method named by v
    fn(...)    # Call it

Or in one line:

    getattr(x,v)(...)


Gary Herron


> PHP code for this would be:
>
> class X {
>   function a() {
>   }
> }
>
> $x = new X();
> $v = 'a';
> $x->$v();
>
> I need a solution for Python. Could you suggest anything?
>
> The task it to call a function whose name is taken from user-supplied
> input.
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From notbob at nothome.com  Thu May  8 13:30:34 2008
From: notbob at nothome.com (notbob)
Date: Thu, 08 May 2008 17:30:34 GMT
Subject: How to kill Python interpreter from the command line?
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <_MGUj.53425$kl6.21975@fe103.usenetserver.com>

On 2008-05-08, spectrumdt at gmail.com <spectrumdt at gmail.com> wrote:

> I am running Fedora Linux and KDE, using the Konsole command line.

I also run python from Konsole.  

> When coding Python, I regularly make a bug causing my program to not
> terminate. But how do I kill the non-terminating Python interpreter
> without killing the entire Konsole?

Are you refering to the python editor?  If so, try cntrl-d.

> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python. Neither do the "terminate
> task", "suspend task" or "interrupt task" commands (available from
> right-click in Konsole).

If you want to completely kill python, open another Konsole session and kill
it from there.  There are several ways.  The simplist is:

killall python

....which will kill python without killing the Konsole session.

This will find the python pid number and kill it with -15 which cleans
everything up nicely before killing.  If that doesn't work, you may need to
use kill -9, which is kill with extreme prejudice and leaves all the bodies
lying around to crap up the works.  To do that, try:

ps aux | grep python

.....which will give you the pid number and then you plug it into:

kill -9 pid_number

If all that doesn't work, change to Slackware!  ;)

nb


From nick at craig-wood.com  Sat May  3 05:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 04:30:03 -0500
Subject: Help with pyserial and sending binary data?
References: <mailman.481.1209758257.12834.python-list@python.org>
Message-ID: <slrng1oatn.7q6.nick@irishsea.home.craig-wood.com>

Rich <richietommy at yahoo.com> wrote:
>  I am working on a python library for sending and receiving data
>  from a Subaru's ECU (the fuel injection computer) via the OBD-II
>  port and an OBD to USB cable, with the Subaru Select Monitor
>  protocol.
[snip]
>  So I've been messing with it, and in as few lines as possible, this
>  should in theory, send the init command to the ECU (0x80 0x10 0xF0
>  0x01 0xBF 0x40), and the ECU should return its ID to let you know
>  that you can now chat (something like 0x80 0xF0 0x10 0x39 0xFF 0xA2
>  0x10 0x0F 0x1B 0x14 0x40 0x05 0x05 0x73 0xFA 0xEB ......):

> 
>  #--------------------------
>  import serial, string
>  output = " "
>  ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
>  ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
>  while output != "":
>     output = ser.read()
>     print hex(ord(output))
>  #--------------------------

The code looks OK.

With a constructor which takes as many arguments as Serial does I tend
to name them to avoid mistakes, eg

serial.Serial("/dev/ttyUSB0", baudrate=4800, bytesize=8, parity='N', stopbits=1, timeout=1)

8N1 is documented as the default so you could then reduce it to the
following if you wanted

serial.Serial("/dev/ttyUSB0", baudrate=4800, timeout=1)

>  The only problem is that when I send the ECU init command, it just
>  echos back the data I sent it, which, from my understanding, means
>  that I sent an invalid request packet.

My experience with these sort of protocols is that if you make a
packet error (wrong address, wrong checksum, wrong start byte) you'll
get no reply at all.

If you make a command error (use a command that isn't understood in a
valid packet) you'll get a properly formatted reply with an error
message in.  This should start 0x80 0xF0 0x10 .... (from and to
reversed).

I'd suspect that if you are just receiving the data back then you have
got your serial cable wrong and have somehow looped tx and rx.  Did
you try your cable with the other programs?  Or possibly you are using
the wrong serial port - are you sure you haven't any other USB
serials?  ls /dev/ttyUSB* on a udev system will show you.  lsusb (as
root) is useful as is dmesg immediately after plugging the port in.

I do a lot of this sort of thing at work (not with cars though with
satellite equipment) and it is always the first packet and the first
response which is the hard part.  After that it is usually plain
sailing!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mnikhil at gmail.com  Wed May 14 14:52:35 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:22:35 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <482B34F3.20705@gmail.com>

Arnaud Delobelle wrote:
> Nikhil <mnikhil at gmail.com> writes:
> 
>> Hi,
>>
>> I am reading a file with readlines method of the filepointer object
>> returned by the open function. Along with reading the lines, I also
>> need to know which line number of the file is read in the loop
>> everytime.
>> I am sure, the line should have the property/attribute which will say
>> the line number of the file.
>>
>> If there is none, do I have to end up using the counter in the loop?
>>
>> fp = open("file", "r")
>> lineno = 0
>> for line in fp.readlines():
>> 	print "line number: " + lineno + ": " + line.rstrip()
>>         lineno = lineno + 1
> 
> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 
Oh I did not know enumerate can be used. Thanks Paul and Arnaud.
I will try this.


From bronger at physik.rwth-aachen.de  Wed May 21 12:59:34 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 21 May 2008 18:59:34 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
Message-ID: <87ej7voao9.fsf@physik.rwth-aachen.de>

Hall?chen!

Daniel Fetchinson writes:

>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>>
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>>
>> Arf ! A goto !
>
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?

In the hands of a skilled person who really knows what he/she does,
it can be a useful statement.  But this collides with the goals of
FT, which claims to be simple to use.  Besides, the above use case
for a goto is definitively awful.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From deets at nospam.web.de  Sun May  4 18:12:13 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 00:12:13 +0200
Subject: Can I install Python 2.4 and 2.5 ?
In-Reply-To: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
References: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
Message-ID: <686qm2F2ri0t9U1@mid.uni-berlin.de>

adolfo schrieb:
> I am reviewing various visualization programs (Scipy, PYGNL, etc) and
> IDE?s. Some run on Python 2.4 others in 2.5.
> 
> Can I have both installed at the same time if I don?t run them
> concurrently?
> 
> Now in Windows XP soon on Ubuntu 8
> 
> Appreciating your help,

Yes you can. However you need to install 3rd-party-modules separately 
for each version - e.g. scipy - if you want to use them with both.

Diez


From mensanator at aol.com  Thu May  8 13:24:40 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 10:24:40 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>

On May 8, 2:06?am, v4vijayakumar <vijayakumar.subbu... at gmail.com>
wrote:
> When I started coding in python, these two things surprised me.
>
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

You must type inconsistently.

I never had such a problem even when I used to use Notepad.

>
> 2. python requires to pass "self" to all instance methods

Who uses methods?

>
> and I missed ":" often. :)

Try using something like Seed7, where you have to use "then" with
"if" and "do" with "while" and "end" in every block. Maybe you'll
come to appreciate significant whitespace and ":".


From thorsten at thorstenkampe.de  Tue May 20 14:31:13 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Tue, 20 May 2008 20:31:13 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
	<0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>
Message-ID: <MPG.229d3757e185e12e98975f@news.individual.de>

* ZeeGeek (Tue, 20 May 2008 09:31:27 -0700 (PDT))
> On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> > > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> > > > > Hi, what's the default localedir for gettext module on windows? In
> > > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > > order to make the translation work?
> >
> > > > %PYTHONHOME%\share\locale
> >
> > > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > > use:
> >
> > > import gettext
> > > gettext.install('testprogram', unicode = True)
> >
> > The syntax is correct. Is the test program localised under Linux or
> > Cygwin? If not then the error is somewhere in your application.
> 
> Yes, it's localized under linux.
> 
> > How did you try to set the language on Windows? It works for me on Vista
> > with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> > be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> > correctly).
> 
> I'm using Simplified Chinese Windows, so I didn't set anything
> specifically before firing up the program. I found that if I use
> gettext.GNUTranslations to read in the .mo file, then it's localized.
> But gettext.install doesn't work.

Well, then why don't you set the environment variable for testing!?

T.


From pataphor at gmail.com  Thu May 22 08:58:41 2008
From: pataphor at gmail.com (pataphor)
Date: Thu, 22 May 2008 14:58:41 +0200
Subject: "indexed properties"...
References: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
	<20080521124744.17546846@outerspace>
	<7sla341agcpd1729k5pa0e0hern05qtv22@4ax.com>
Message-ID: <20080522145841.7c9e8133@hyperspace>

On Thu, 22 May 2008 06:26:41 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> On Wed, 21 May 2008 12:47:44 +0200, pataphor <pataphor at gmail.com>
> wrote:
> >Using the trick of encapsulating the values inside single-element
> >lists one can make a transposition of the matrix and get
> >synchronicity for the little price of doubling the number of
> >instances. Since the views share the data this is a lot less
> >expensive than one would think. One can use the row view or the
> >column view to alter data and the changes will automatically be
> >visible in the other view, since the views update the same lists. 
> 
> Oh - that's different. This is not what I thought you had in mind
> (it's not what I had in mind in the thing I called a joke.)

The idea has two parts, the first part is to create two views and the
second part is to somehow synchronize the data. To make both views
update the same data is just not a very lazy synchronization
procedure. 

Does it even have to be a list? Let's see ...

No, this works as well:

class Shared(object):
    
    def __init__(self,value=None):
        self.value = value

class Storage(ListMixin):

  def __init__(self, seq=[]):
    self.L = map(Shared,seq)

  def _constructor(self, iterable):
    return Storage(iterable)

  def __len__(self):
    return len(self.L)

  def _get_element(self, i):
    assert 0 <= i < len(self)
    return self.L[i].value

  def _set_element(self, i, x):
    assert 0 <= i < len(self)
    self.L[i].value = x

  def _resize_region(self, start, end, new_size):
    assert 0 <= start <= len(self)
    assert 0 <= end   <= len(self)
    assert start <= end
    self.L[start:end] = [Shared() for i in range(new_size)]
 
> >  def _constructor(self, iterable):
> >    return Storage(iterable)
> 
> Probably I'm just being dense. Why does
> _constructor exist? (Oh - looking at things
> below, I imagine it's something to do with
> ListMixin.)

I just filled in the example class. It was very handy, one can make
changes very quickly because all the functionality is in a few lines of
code.

P.



From jcd at sdf.lonestar.org  Thu May 22 14:30:06 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 22 May 2008 14:30:06 -0400
Subject: import X vs from x import *
In-Reply-To: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <1211481006.12177.7.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-22 at 10:44 -0700, notnorwegian at yahoo.se wrote:
> import Tkinter
> from Tkinter import *
> 
> i have a program where if i comment out either of those import-
> statements i get an error.
> 
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Others have explained what one statement does as opposed to the other.

In general, you do not want to use from x import *.  Your namespace gets
polluted with all sorts of variables, and you don't know if you're going
to overwrite something important.  It's much better to specify which
names you want to import (for the sake of those reading your code later,
and for the sake of future-proofing your code against new variables
finding their way into the module being imported from), or just to
import the package (and optionally assign it to a shorter alias)

import Tkinter as tk

tk.function()

That said, there are occasional packages where it is common practice to
import *.  Tkinter might be one of those.  I don't have any experience
with it.  But don't make a habit of it. :)

Cheers,
Cliff




From fuzzyman at gmail.com  Sun May 18 17:25:38 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 18 May 2008 14:25:38 -0700 (PDT)
Subject: about python
References: <mailman.31.1208919375.12834.python-list@python.org>
Message-ID: <d23c17bd-fc58-44c4-9162-f0e57ea80367@m36g2000hse.googlegroups.com>

On Apr 23, 3:50?am, mran... at varshyl.com wrote:
> How can python execute in browser?
>
> Mukul

The best way of running Python code in the browser is with the
Silverlight browser plugin. Silverlight 2 (currently working with IE,
Safari and Firefoxon Windows and Mac OS X - but Silveright 2 for
Linux, called Moonlight, made major steps in the last few days).

You can run IronPython code inside Silverlight, with the choice of the
WPF based user interface or interacting with the browser DOM and
Javascript.

See the following for more details:

    http://www.voidspace.org.uk/ironpython/silverlight/

Michael Foord
http://www.ironpythoninaction.com/


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:12:19 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:12:19 -0300
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
	<a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com>
Message-ID: <op.ubg3yti5x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 16:22:10 -0300, Joe P. Cool  
<joe.p.cool at googlemail.com> escribi?:
> Ludwig Miniatur wrote:
>> For example:
>> #!/usr/bin/env python
>>
>> from parser import suite, ast2list
>> fh = file(__file__)
>> s = fh.read()
>> fh.close()
>> ast = suite(s)
>>
>> while False:
>>   print "hello world"
>> # comment
>>
>> Looks like a little bug in parser; but what I don't understand is that
>> I thought parser was build with the current syntax of python.
>
> I didn't read the grammar but I assume that Python grammar requires a
> comment to have the form #.*<end-of-line>.
>>
>> So, why can python run the script (an it can if you comment out the
>> line "ast = suite(s)") but parser can't?
>
> The interpreter probably appends a newline after the input stream as a
> friendly service :)

Something like that. The last line of source *must* end in a newline (be  
it a comment or not); this is a known limitation. See py_compile.py for an  
example.

-- 
Gabriel Genellina



From mensanator at aol.com  Fri May 30 11:41:16 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 08:41:16 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org> 
	<g1p50c$97h$1@news.lrz-muenchen.de>
Message-ID: <45f694b7-8c2c-4548-b6e8-42a12e96e0d4@d77g2000hsb.googlegroups.com>

On May 30, 10:03?am, Philipp Pagel <pDOTpa... at helmholtz-muenchen.de>
wrote:
> Skonieczny, Chris <Skonieczn... at emssatcom.com> wrote:
> > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> >http://mail.python.org/pipermail/python-list/2007-February/427841.html?
>
> > It is not true - eg. try :
> > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > b=int(a)
> > and what you will get ? An error !!!
>
> 'P' is obviously not an ASCII representation of a number.

It is in base 36.

>>> a='P'
>>> b=int(a,36)
>>> b
25


> What did you expect? The closest number by visual appearance?
>
> cu
> ? ? ? ? Philipp
>
> --
> Dr. Philipp Pagel
> Lehrstuhl f. Genomorientierte Bioinformatik
> Technische Universit?t M?nchenhttp://mips.gsf.de/staff/pagel



From upton at virginia.edu  Wed May 21 19:30:27 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 19:30:27 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
	<be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>
Message-ID: <5504f9ac0805211630i1475aa16i340394ffd5c7f700@mail.gmail.com>

On Wed, May 21, 2008 at 5:27 PM, Fuzzyman <fuzzyman at gmail.com> wrote:
> On May 14, 10:30 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> > Dave Parker schrieb:
>> > > All of the calculators and textbooks that elementary school students
>> > > use, use "^" for powers.
>>
>> I've never seen this symbol in textbooks. In textbooks, powers are
>> written using superscript.
>>
>> >>  Just like Flaming Thunder does.  I haven't
>> > > seen "**" for powers since FORTRAN.
>>
>> I haven't seen any language using '^' as the power operator so far -
>> but I've seen quite a lot of them using it as the bitwise XOR operator.
>
>
> Excel uses the caret as the power operator. Arguably the worlds most
> widely used programming environment...
>
I think BASIC did, too.  I know I used to use it in some language and
was confused when I first tried to use it in Java and didn't get what
I was expecting.  ("Some language" must be in the set (BASIC, C,
Logo).)


From alex.m.gusarov at gmail.com  Thu May 29 03:50:19 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:50:19 +0700
Subject: Struct usages in Python
In-Reply-To: <ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
	<e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
	<ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>
Message-ID: <ac6dcb3d0805290050u4d1c151ft34a60984d6c8df04@mail.gmail.com>

> Yes. That is the somewhat unfortunate difference between new-style and old-style classes.
> Use new-style if you can, and that means that "object" must be part of the inheritance graph.

...

>    You are wrong for Python 2.X, but right for Python 3 where old-style
>
>    classes are gone for good.

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov


From kyosohma at gmail.com  Tue May 27 10:05:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 07:05:32 -0700 (PDT)
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
Message-ID: <dfe98ed6-e7c9-4797-87b3-bd55f5806140@r66g2000hsg.googlegroups.com>

On May 27, 3:54?am, Giraffe <kerstin.vilters... at semcon.com> wrote:
> I have the followong class in a file:
> --------------------------------------------
> class someClass:
> ? ?def __init__ (self):
> ? ? ? self.someVar = 10
>
> ? ?def getSomeVar (self):
> ? ? ? return self.someVar
> --------------------------------------------
>
> In another file a do the following:
> --------------------------------------------
> tmp = someClass ()
> tmp.getSomeVar ()
> --------------------------------------------
>
> I run the second file in the IDLE environment and everything seems to
> be working fine until I start to modify in the first file:
> --------------------------------------------
> class someClass:
> ? ?def __init__ (self):
> ? ? ? self.someVar = 10
>
> ? ?def getSomeVar (self):
> ? ? ? print "Modified class!"
> ? ? ? return self.someVar
> -------------------------------------------
>
> When I now try to run the second file in the IDLE environment again, I
> DO NOT get the newly added printout. I have saved and compiled (run)
> both files but there is still no change. What have I missed?


You might also look into the reload(module) function, documented here:

http://docs.python.org/lib/built-in-funcs.html

It's made for that sort of thing.

Mike


From stanc at al.com.au  Fri May  2 05:40:15 2008
From: stanc at al.com.au (Astan Chee)
Date: Fri, 02 May 2008 19:40:15 +1000
Subject: get number that is raised to the power of
In-Reply-To: <97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>
References: <481ADC8B.20000@al.com.au>
	<97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>
Message-ID: <481AE17F.7070503@al.com.au>



Python.Arno wrote:
> the "reverse" of a power to is logarithm
> so v = 10**n  <=>  math.log(v,10) = n
>
> Arno
>
Im so ashamed of myself for not thinking in logs.
I must be dreaming again.
Thanks for the help.

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From arnodel at googlemail.com  Thu May 15 07:09:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 04:09:53 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
Message-ID: <10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>



bruno.desthuilliers at gmail.com wrote:
> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
> > "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> > >> __new__ is a static method!
> >
> > > __new__ is a special-cased staticmethod that  1/ must not be declared
> > > as such and 2/ takes the class object as first args. As far as I'm
> > > concerned, it's semantically a classmethod.
> >
> > It's a static method!
>

OK then let me reply pedantically:

> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
> a staticmethod object. What I say is that
> 1/ it's special-cased since you don't *explicitely* declare it as a
> staticmethod

In some cases you have to:

class Foo(object): pass

# Later on I want to redefine Foo.__new__

@staticmethod
def Foo__new__(cls):
    print "new Foo!"
    return object.__new__(cls)

Foo.__new__ = Foo__new__

>>> Foo()
New Foo!
>>> # Without the @staticmethod we would get a TypeError

> 2/ it behaves just like a classmethod, since it takes the class as
> first argument.

When you invoke it implicitely maybe, but not when you do so
explicitely! Look at my example below:  to create my Foo object, I
have to write

    object.__new__(Foo)

> IOW, I'm talking about semantic, not implementation.

I understand what you mean, and from that point of view you can argue
against my example above (after all, my example is code, not pure
concept) but for me it is simpler to think of __new__ as a
staticmethod (which it is!), plain and simple.

--
Arnaud


From Russ.Paielli at gmail.com  Mon May 26 23:10:29 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Mon, 26 May 2008 20:10:29 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
	<mailman.1629.1211844239.12834.python-list@python.org>
Message-ID: <03655ec7-2136-4cea-9575-34e321356439@p25g2000pri.googlegroups.com>

On May 26, 4:23 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:

> To make things clear: _variables ARE visible when you import a module:
>
> C:\TEMP>type module.py
> _variable = 123
>
> (invoke python)
> py> import module
> py> module._variable
> 123
> py> dir(module)
> ['__builtins__', '__doc__', '__file__', '__name__', '_variable']
> py>
> py> from module import _variable
> py> _variable
> 123
>
> Only when you use "from module import *" _variable isn't imported.
> (new python session):
>
> py> from module import *
> py> _variable
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> NameError: name '_variable' is not defined

Hmmm... that seems a bit strange. Why should "_variable" be visible
when you use "import module" but not when you use "from module import
*"?

> That last form should not be used normally, except when playing with the
> interactive interpreter.

OK, I have a confession to make. I use "from module import *" almost
exclusively. But then, I'm different from most folks. I can drink six
beers and still drive safely, for example. The key is to drive faster
so I can get past dangerous situations quicker.




From max at alcyone.com  Sat May  3 17:31:33 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:31:33 -0700
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <87fxszrscz.fsf@physik.rwth-aachen.de>
References: <fvi54o$26lb$1@toralf.uib.no>
	<m2zlr7l20r.fsf@googlemail.com>	<481CB283.107@gmail.com>	<8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>
	<87fxszrscz.fsf@physik.rwth-aachen.de>
Message-ID: <AoadnWucdeAlRIHVnZ2dnUVZ_qPinZ2d@speakeasy.net>

Torsten Bronger wrote:

> No, the above expression should yield ''+'abc'+'efg', look for the
> signature of sum in the docs.

You're absolutely right, I misread it.  Sorry about that.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From deets at nospam.web.de  Sun May 25 07:40:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:40:47 +0200
Subject: Python, Daemons and D-Bus
In-Reply-To: <24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
	<g19rcb$pjt$02$1@news.t-online.com>
	<24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>
Message-ID: <69t1i1F33b3ncU1@mid.uni-berlin.de>

PurpleServerMonkey schrieb:
> On May 25, 5:46 am, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
>> [ PurpleServerMonkey <PurpleServerMon... at gmail.com> ]
>>
>>> Would you use D-Bus or a more traditional IPC method such as sockets?
>>> Although D-Bus is relatively new it looks interesting, just not sure
>>> it would work well in this kind of project.
>> DBus is not really intended for private communication between processes of
>> the same application, but more for intercommunication between different
>> applications.  If the IPC interface of your backend daemons is intended to
>> be used by other applications, DBus is the right choice, otherwise I would
>> choose something different.
>>
>> The reason is, that DBus doesn't know about applications.  It exposes all
>> objects registered on the bus to every DBus client on the system and so
>> makes you application-private API available to the public (and spams the
>> bus with lots of generally useless objects ;) ).
>>
>> In case your IPC interface is application private, a custom IPC protocol
>> (probably using XML RPC over unix sockets) is better suited.
>>
>> Moreover you should make your choice dependent on the type of data you
>> transmit.  Both DBus and XML-RPC wrap calls into XML messages, which is
>> terribly inefficient for large binary data.
>>
>> --
>> Freedom is always the freedom of dissenters.
>>                                       (Rosa Luxemburg)
> 
> Thanks Sebastian,
> 
> Your comments make a lot of sense. I was thinking of creating a custom
> session channel and using that for my purposes but as you mentioned
> it's not very secure and I do want to keep the server to daemon
> traffic private, the server has an XML-RPC interface with a public
> API.
> 
> Will definitely look at using a different IPC mechanism for this part
> of the project.

If you can - use Pyro. It is easy, fast and can be made secure using SSL 
AFAIK.

Diez


From afilash+python at gmail.com  Wed May 21 12:54:55 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Wed, 21 May 2008 22:24:55 +0530
Subject: can someone with guessing a number
In-Reply-To: <005101c8bb61$b78fb710$1300a8c0@Home>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
Message-ID: <9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>

    if tries > 10:
        print 'you failed- give up'


On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:

>  I would just like the program to exit after guessing the amount of
> numbers wrong
>
> # Guess My Number
> import random
> the_number = random.randrange(100) + 1
> tries = 1
> # guessing loop
> while (guess != the_number):
>     if (guess > the_number):
>         print "Lower..."
>     else:
>         print "Higher..."
>
>     guess = int(raw_input("Take a guess: "))
>     tries += 1
>     if tries > 10:
>         print 'you failed- give up'
>
> print "You guessed it!  The number was", the_number
> print "And it only took you", tries, "tries!\n"
>
> raw_input("\n\nPress the enter key to exit.")
>
> many Thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ppr.vitaly at gmail.com  Thu May 29 06:14:07 2008
From: ppr.vitaly at gmail.com (Vitaliy)
Date: Thu, 29 May 2008 03:14:07 -0700 (PDT)
Subject: Error: Cannot convert Decimal("0.0000") to Decimal
Message-ID: <32b8c8c0-e567-477f-9495-56e38ec2b2c1@e53g2000hsa.googlegroups.com>

Hi

I got this wired exception periodically (Python 2.5, Django based
application)
what does it mean ?


From aisaac at american.edu  Thu May 29 16:26:15 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 20:26:15 GMT
Subject: should I put old or new style classes in my book?
In-Reply-To: <m2d4n43oxc.fsf@googlemail.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com>
Message-ID: <HjE%j.14125$ED6.6685@trnddc02>

This thread raises two questions for me.



1. I take it from this thread that in Python 3 the

following are equivalent:



        class Test: pass



        class Test(object): pass



Is that correct, and if so, where is it stated explicitly?

(I know about the "all classes are new style classes" statement.)



2. I take it from this thread that in Python 2.2+

   if I put the following at the top of a module ::



        __metaclass__ = type



then all the classes defined in that module will be newstyle 

classes.  Is that correct?  Somehow I did not grok that from 

<URL:http://docs.python.org/ref/metaclasses.html>

but it seems right.



Thank you,

Alan Isaac






From mszpadzik at gmail.com  Thu May 29 15:01:30 2008
From: mszpadzik at gmail.com (Mike)
Date: Thu, 29 May 2008 12:01:30 -0700 (PDT)
Subject: Python threads and memory usage
Message-ID: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>

Hi,

I'm writing client-server application in Python. It's monitoring
system, where server listen and waits for TCP connections, and every
connection takes own thread. Every thread puts data from clients to
Queue and exits. Then there is one DB loader thread, which loads all
data from Queue to MySQL DB.

I observed, that every thread reserved some memory, and after exit
thread doesn't freed it. When i leaved my server working for 3 days,
then it takes 15% of 512MB memory (during that time about 15000
threads were created and stopped). When server starts it only takes
about 1% of memory.

I know that I can made client which connects once and keep this
session with server thread all time (it should resolve my problems),
but I'm curious if this is normal or it is something like memory leak.
Or maybe I'm doing something wrong :)

If You need I can paste all my code.

Regards


From arnodel at googlemail.com  Wed May  7 14:21:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:21:12 +0100
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
Message-ID: <m2k5i6561z.fsf@googlemail.com>

"M?ta-MCI (MVP)" <enleverlesX.XmcX at XmclaveauX.com> writes:

> Hi!
>
> print become a function ; OK
>
> I thought: and why the affection (=) would not become, also, a function?
> Examples:
>        a = 123                            return 123
>        b,c = 543.21, "LOL"        return  (543.21, "LOL")

Do you mean a = 3 would become an *expression* ?

For one thing, it wouldn't fit with the Python's function call syntax:

    f(4, x=2)

currently means that f is called with first positional argument equal
to 4 and named argument 'x' equal to 2.

Moreover, it seems to me utterly unpythonic (and I don't often feel
like using this word!).  Binding a name to a new value is something
that needs to be clearly visible in the code flow, not hidden within
an expression

E.g.

    f(3, 4 + (x=2), 5)

has the side-effect that x is now bound to 2, but it is only apparent
if one closely scrutinises the code.

-- 
Arnaud


From marc at stopspam.goldak.ca  Wed May 28 13:28:40 2008
From: marc at stopspam.goldak.ca (Marc Pelletier)
Date: Wed, 28 May 2008 12:28:40 -0500
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<mailman.1632.1211848522.12834.python-list@python.org>
Message-ID: <Xns9AAC74C19C11Ammpp1234.dd@216.168.3.44>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in 
news:mailman.1632.1211848522.12834.python-list at python.org:

> I'm unsure if you're looking for a development environment like these:
> http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
> or an interface designer for wxPython (see the bottom part of  
> http://wiki.python.org/moin/GuiProgramming)
> 
> 

Thanks Gabriel and others,

I found these links useful and also followed a trail to something I thought  
was called "Python pit", which was very good, but I can't find it now. Most 
of the tools seem to be for creating and serializing the dialogs to xml or 
other, which will work fine, but unfortunately isn't what the previous 
developer on the project did. So I guess I'll have to continue with it 
manually.

cheers

Marc


From ewertman at gmail.com  Thu May  8 22:04:00 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Thu, 8 May 2008 22:04:00 -0400
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
Message-ID: <92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>

Something like this.  I'm sure there are other ways to do it.

import re

def addspace(m) :
        return ' ' + m.group(0)

strng = "ModeCommand"

newstr =  re.sub('[A-Z]',addspace,strng)

print newstr.strip()



On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschroed at gmail.com> wrote:
> I have a string (which I got from the names of my classes) and I would like
> to print out my CamelCase classes as titles.
>
> I would like it to do this:
>
>>>> my_class_name = "ModeCommand"
> ## Do some magic here
>>>> my_class_name
> 'Mode Command'
>
> Anyone know any easy way to do this?  Thanks.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From larzluv at hotmail.com  Sun May 11 21:43:18 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:43:18 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
References: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>
Message-ID: <ef099531-d38a-4b98-b19a-b7f0ac5a5aae@d1g2000hsg.googlegroups.com>

On May 10, 11:42 am, vbgunz <vbg... at gmail.com> wrote:
> I will pay anyone for a face-to-face tutoring in the Orlando Florida
> area. I will pay $20.00 per hour (minimum 2 hours needed). What I need
> are lessons in Decorators and Class methods. If I can walk away with
> at least 5 lessons taught in both subjects I will be happy to offer an
> additional $20.00.
>
> If you are interested in this offer feel free to either reply through
> email OR here on this thread. There are no string attached, catches,
> etc. I need to learn and if you can teach well, I will be happy to
> learn.
>
> Best Regards
> Victor B. Gonzalez


I know you're looking for "one-on-one" help, direction, and/or
tutelage, but since you've not received an answer (yet), here's some
general info...

---

For Class Methods, perhaps you could mention more of what you need to
know?  Otherwise, generically see:

    http://docs.python.org/tut/node11.html#SECTION0011340000000000000000
    http://www.geocities.com/foetsch/python/new_style_classes.htm
    http://www.diveintopython.org/object_oriented_framework/defining_classes.html

and obviously

    http://www.google.com/search?hl=en&q=python+class+methods&btnG=Google+Search

---

For Decorators, have a gander at:

    http://www.ddj.com/web-development/184406073;jsessionid=QCNTPTSNXZP2WQSNDLPCKHSCJUNN2JVN?_requestid=749134
    http://www.ibm.com/developerworks/linux/library/l-cpdecor.html

and obviously

    http://www.google.com/search?hl=en&q=python+decorators&btnG=Google+Search

Decorators are still rather new to -me-, and I've yet to "need" 'em,
but they _seem_ like a handy feature.  (Personally, I don't care too
much for the syntax, but other than explicitly DOING what they do,
which would be [1] messier and/or [2] non-transparent/duplicative, I
sadly have no alternative thought[s]...  ;) )


Cheers,
-Larry Hale


From Scott.Daniels at Acm.Org  Sun May 18 00:25:06 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 17 May 2008 21:25:06 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <mailman.1253.1210977544.12834.python-list@python.org>
References: <mailman.1246.1210972944.12834.python-list@python.org>	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>	<482DFF63.7020701@islandtraining.com>
	<mailman.1253.1210977544.12834.python-list@python.org>
Message-ID: <yLidnbNdmdUEMLLVnZ2dnUVZ_gOdnZ2d@pdx.net>

Eduardo O. Padoan wrote:
> On Fri, May 16, 2008 at 6:40 PM, Gary Herron <gherron at islandtraining.com> wrote:
>> bruno.desthuilliers at gmail.com wrote:
>>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>>
>>>> Dan Upton wrote: 
   <<asking about iterating over a dictionary and deleting elements>>
>>>> ...to solve the immediate problem:
>>>>   for pid in procs_dict.keys():
>> And then, in Python3, keys() produces something else altogether (call a view
>> of the dictionary) which would provoke the same problem, so yet another
>> solution would have to be found then.
> In Python 3.0, list(procs_dict.keys()) would have the same effect.
Or (simpler in either 3.0 or 2.X):
     for pid in list(procs_dict):
         ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From mrkmuthuraman at gmail.com  Tue May  6 21:28:56 2008
From: mrkmuthuraman at gmail.com (fashion girl)
Date: Tue, 6 May 2008 18:28:56 -0700 (PDT)
Subject: The worlds largest FREE jobs and resume database!
Message-ID: <e485b599-3d0a-429a-a47e-69934c68ccfc@m73g2000hsh.googlegroups.com>

The worlds largest FREE jobs and resume database!


 Employers search resumes and post jobs FREE.
 Jobseekers post resumes and search jobs FREE.


http://www.freewebs.com/eeyes/




From paul at boddie.org.uk  Wed May  7 18:52:25 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 15:52:25 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
	<3aoudmza.fsf@gmail.com>
Message-ID: <7e675421-4f06-4f18-a2c7-5d1b083c0fc0@25g2000hsx.googlegroups.com>

On 7 Mai, 19:48, vivai... at gmail.com (Ville M. Vainio) wrote:
> Paul Boddie <p... at boddie.org.uk> writes:
> > original licence as well. Now, I did leave a fair amount of
> > information about the heritage of the code, so that anyone who is
> > scared of the LGPL could just go and get the original work, but that
>
> I doubt anyone is really afraid of LGPL. The only problem with LGPL is
> that of static vs. dynamic linking, and that is only a problem in
> platforms without dynamic linker (rarity these days).

The wxWindows, erm, wxWidgets people seemed to be worried enough to
neuter the licence, making the result a somewhat bizarre creation.

> > You can almost never just "grab the code from somewhere without having
> > to think about [the] license" since even permissive licences typically
> > have a list of conditions that must be observed. Certainly, they
>
> Yeah, but you don't have to "worry" about license - just have the
> license text in source code, or a text file in binary distribution.

Yes, but you are still having to think about the licence: if it were
public domain code (and provably so, opening up another discussion
entirely) then you wouldn't need to think twice about doing whatever
you wanted with the code. I accept that with the GPL, you're obliged
to think about what you're going to need to do with the source, but in
licences like the modified BSD licence, the FreeBSD licence or the X11
licence, that text file in the binary distribution is quite possibly
something that some people might overlook.

There are other things that could trip people up, of course: non-
endorsement clauses, required notices of modifications, patent
retaliation clauses, and so on. All these do feature in permissive
licences.

Paul


From daveparker at flamingthunder.com  Mon May 12 19:39:25 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 16:39:25 -0700 (PDT)
Subject: Python and Flaming Thunder
Message-ID: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>

I've read that one of the design goals of Python was to create an easy-
to-use English-like language.  That's also one of the design goals of
Flaming Thunder at http://www.flamingthunder.com/  , which has proven
easy enough for even elementary school students, even though it is
designed for scientists, mathematicians and engineers.


From needin4mation at gmail.com  Thu May  1 17:25:11 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 14:25:11 -0700 (PDT)
Subject: where do I begin with web programming in python?
Message-ID: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>

I have been to the main python site, but am still confused.  I have
been using .net, so it may be obvious how to do this to everyone
else.  I am aware there are various frameworks (Django, Pylons, etc.),
but I would like to know how to create web pages without these.  If I
have mod_python or fastcgi on apache, where do I start?  I don't have
clue where to begin to create a web page from scratch in python.  I am
sure I will want to access database, etc., all the "normal" stuff, I
just want to do it myself as opposed to the frameworks, for learning.

Thank you for any help.


From matthieu.brucher at gmail.com  Fri May 30 04:33:23 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Fri, 30 May 2008 10:33:23 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <HjE%j.14125$ED6.6685@trnddc02>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
Message-ID: <e76aa17f0805300133k61ba44b7p3adecc5c5d8c42cf@mail.gmail.com>

2008/5/29 Alan Isaac <aisaac at american.edu>:

> This thread raises two questions for me.
>
>
>
> 1. I take it from this thread that in Python 3 the
>
> following are equivalent:
>
>
>
>       class Test: pass
>
>
>
>       class Test(object): pass
>
>
>
> Is that correct, and if so, where is it stated explicitly?
>
> (I know about the "all classes are new style classes" statement.)
>

All classes are new style classes, and the usual

class MyClass(object) pass

should be replaced by the first

class MyClass: pass

IIRC. I don't know ATM where I read it.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From deets at nospam.web.de  Mon May 12 11:29:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 17:29:51 +0200
Subject: buffering choking sys.stdin.readlines() ?
In-Reply-To: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
References: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
Message-ID: <68r63qF2s4ksaU1@mid.uni-berlin.de>

cshirky schrieb:
> Newbie question:
> 
> I'm trying to turn a large XML file (~7G compressed) into a YAML file,
> and my program seems to be buffering the input.
> 
> IOtest.py is just
> 
>   import sys
>   for line in sys.stdin.readlines():
>     print line
> 
> but when I run
> 
> $ gzcat bigXMLfile.gz | IOtest.py
> 
> but it hangs then dies.
> 
> The goal of the program is to build a YAML file with print statements,
> rather than building a gigantic nested dictionary, but I am obviously
> doing something wrong in passing input through without buffering. Any
> advice gratefully fielded.

readlines() reads all of the file into the memory. Try using xreadlines, 
the generator-version, instead. And I'm not 100% sure, but I *think* doing

for line in sys.stdin:
    ...

does exactly that.

Diez


From http  Wed May  7 02:06:41 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:06:41 -0700
Subject: ]ANN[ Vellum 0.16:  Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <7xy76md4we.fsf@ruckus.brouhaha.com>

"Zed A. Shaw" <zedshaw at zedshaw.com> writes:
> How do people feel about Vellum's GPLv3 status? 

I'm certainly in favor of it, though I didn't notice this question
until it spawned its own thread, and I'm not currently a Vellum
user or developer, so maybe my view shouldn't count for much.


From phd at phd.pp.ru  Sun May  4 10:18:13 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sun, 4 May 2008 18:18:13 +0400
Subject: SQLObject 0.10.1
Message-ID: <20080504141813.GD3097@phd.pp.ru>

Hello!

I'm pleased to announce version 0.10.1, a bugfix release of 0.10 branch
of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.10.1

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.10.0
-----------------

Bug Fixes
~~~~~~~~~

* Fixed a bug: limit doesn't work in sqlbuilder.Select.

* A bug in inheritable delColumn() that doesn't remove properties was fixed.

* A minor bug was fixed in col.py - the registry must be passed to findClass().

* Reverted the patch declarative.threadSafeMethod() - it causes more harm
  then good.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From jstucklex at attglobal.net  Thu May 22 23:09:34 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Thu, 22 May 2008 23:09:34 -0400
Subject: php vs python
In-Reply-To: <JemZj.61574$3v1.54084@bignews3.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
Message-ID: <k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>

inhahe wrote:
> I don't like php.  I tried it once and I had it sort a list, but the list 
> was apparently too long for its sorting function because it just sorted the 
> first so-many elements of it and left the rest in order, and didn't generate 
> any error.  I like a language that's actually determined by what you tell it 
> to do.  

Then I suspect you had an error in your code.  PHP's sort functions work 
fine.

> I hear it has a lot of security issues too.  

The language has no security issues.  Programmers have security issues - 
whether it be PHP, Python or any other language.

> I'm not sure that php 
> *runs* faster than python, having seen benchmarks, but it certainly loads 
> faster.  Maybe not so much of a difference once python25.dll is already in 
> the cache though (speaking from a windows perspective).  because when i load 
> a program it can take a while but it's pretty quick if i'd just loaded one 
> recently.  but you don't necessarily have to load python for each page 
> rendering anyway.
> 
> I like the Python language a lot better than php.  but I just really like 
> Python.
> 

I like PHP much better than Python.  To each their own.

> php mixes html and code out-of-the-box (sort of.. i guess it's more like a 
> reversal of which one is explicit)... if you use Python you should look into 
> a 'templating engine' like mako.  i use cheetah, but mako is supposed to be 
> better.
>

PHP can do that.  There are also a number of templating engines 
available.  The nice thing about PHP is you have a choice.

> i think Python is the easiest language to learn, with the possible exception 
> of qbasic (just because making multidimensional arrays in python isnt that 
> obvious, although maybe it is using numpy, i've never tried it).  Python 
> isn't as easy as basic if you use/have to read the more advanced features, 
> but those aren't even available in basic. so I find it a comfortable 
> learning curve.
> 
> 

I found PHP easier to learn than Python.  But that may be because I 
already have a strong C/C++ background.

There isn't anything wrong with Python.  I just prefer PHP.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From apardon at forel.vub.ac.be  Thu May 29 04:14:49 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 29 May 2008 08:14:49 GMT
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <slrng3spfp.7bl.apardon@rcpc42.vub.ac.be>

On 2008-05-24, Fuzzyman <fuzzyman at gmail.com> wrote:
>
> A worthwhile question for the OP - your patch seems fairly simple. Is
> it easy for you to extend unittest for your own testing needs by
> subclassing?

I've been ill the last days, but I will look into this possibility.

-- 
Antoon Pardon


From deets at nospam.web.de  Mon May 19 06:01:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 12:01:56 +0200
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <69d1hnF32r2ugU1@mid.uni-berlin.de>

kuratkull at kuratkull.com wrote:

> Hello,
> 
> ***************
> import urllib2
> import re
> import string
> import sys
> 
> url = "http://www.macgyver.com/"
> request = urllib2.Request(url)
> opener = urllib2.build_opener()
> html = opener.open(request).read()
> 
> match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
> 
> out = match.findall(html)
> 
> print out
> **************
> 
> I would like to print out string with formatting, but as I read, the
> string is made into a raw string when using re.
> How could I disable or bypass this?

You have a misconception here. A raw-string in python is *only* different as
literal - that is, you can write

r"fooo\bar"

where you'd have to write

"fooo\\bar"

with "normal" string-literals. However, the result of both is a byte-string
object that is exactly equal. So whatever out contains, it has nothing to
do with raw-string or not.

But what you probably mean is that putting out a list using print will use
the repr()-call on the contained objects. So instead of doing

print out

do 

print "\n".join(out)

or such.

Diez


From inhahe at gmail.com  Thu May 22 15:29:42 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 15:29:42 -0400
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <5PjZj.78772$%15.70394@bignews7.bellsouth.net>


"Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message 
news:5RiZj.165543$ng7.151222 at en-nntp-05.dc1.easynews.com...
> Is there an easy way to get a list comprehension to produce a flat list 
> of, say, [x,2*x] for each input argument?
>
> E.g., I'd like to do something like:
>
> [ [x,2*x] for x in range(4) ]
>
> ...and receive
>
> [ 0,0,1,2,2,4,3,6]
>
> ...but of course you really get a list of lists:
>
> [[0, 0], [1, 2], [2, 4], [3, 6]]
>
> I'm aware I can use any of the standard "flatten" bits of code to turn 
> this back into what I want, but I was hoping there's some way to avoid the 
> "lists of lists" generation in the first place?
>
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" 
> to do so?
>
> Thanks,
> ---Joel
>

i figured out a solution

sum([x,2*x] for x in range(4)],[]) #not tested
sum(zip(list1,list2),()) #not tested

(you did say you knew of ways to flatten, but i dunno if you knew of that 
way or not)

as an aside, i wish that sum didn't have to take the second parameter. it's 
kind of superfluous.  it can just use the first item as the initial value 
instead of 0 when no initial value is specified.   it would be a little 
complex to do without putting a conditional in your main loop and slowing it 
down, but it could be done.




From cokofreedom at gmail.com  Thu May  8 08:08:23 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 8 May 2008 05:08:23 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
	<12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>
Message-ID: <52d0031c-202c-48d2-a61b-27f6c76fd5f3@b64g2000hsa.googlegroups.com>

C#

using System;
namespace HelloWorld
{
Class HelloWorld
{
static void Main(String[] args)
{
Console.WriteLine("Hello World");
}
}
}


From marlin_rowley at hotmail.com  Thu May 15 20:44:09 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 19:44:09 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482CC073.20402@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
	<482CA10E.1040602@islandtraining.com>
	<BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl> 
	<482CC073.20402@islandtraining.com>
Message-ID: <BAY135-W17AB1ED5FC12595613616E9FC80@phx.gbl>

Thanks.  I'll churn on this for awhile..

> Date: Thu, 15 May 2008 16:00:03 -0700> From: gherron at islandtraining.com> To: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > Hey Gary!> > Please keep such discussions on the public python-list -- not personal > e-mail.> > Scroll down for an answer to your latest question.> >> > Here's what I have that renders fine but I see some optimization that > > can be done (as you mentioned):> >> > # Tile Generation> > # This is where all the drawing to the client window> > # will happen. > > def generateTile( txl, tyl, tileWidth, tileHeight, clientWindow ):> > # make rgba (8-bit) data structure and zero it out.> > rgb = zeros( tileWidth*tileHeight*3, UnsignedInt8 )> > alpha = zeros( tileWidth*tileHeight*3, UnsignedInt8 )> > > > #print 'tileWidth: %s' % tileWidth> > #print 'tileHeight: %s' % tileHeight> > # for each pixel in the tile> > # we must invert the rendering of each> > # tile for wxPython's Bitmap support.> > for y in range( (tileHeight-1),-1,-1 ):> > for color in range(4):> > > > # read per scanline> > pixelComp = clientWindow.fileIO.read(4*tileWidth) <<<< > > HERE'S YOUR OPTIMIZATION!!> > > > for x in range(tileWidth):> > # mental ray streams RGBA components across the width> > # of every tile. so it first does all the r's,> > # then all the g's, then all the b's, etc.. across> > # the width.. Then it streams the second row, etc..> > # However, wxPython Bitmap class accepts an array of> > # tuples or just a byte order of RGBARGBARGBA, etc..> > # so we convert, keeping track of an offset.> > if color < 3:> > index = (3*(y*tileWidth+x))+color> > else:> > index = (3*(y*tileWidth+x))> > > > > > # RGBA_FP> > if clientWindow.pixelCode == 13:> > > > # unpack the pixel> > #fourbytes = pixelComp[:4]> > #pixelComp = pixelComp[4:]> > buffer = unpack("!f", pixelComp[4*x:4*x+4]) > > <<<<<<<<<<<<<<<<<< YOUR OPTIMIZATION!!> > > > # convert from 32-bit to 8-bit precision> > gamma = clientWindow.gamma> > if gamma == 1.0:> > pixel = int(255 * buffer[0] + 0.5)> > pixel = clamp(pixel,0,255)> > if color == 3:> > alpha[index+0] = alpha[index+1] = > > alpha[index+2] = pixel> > else:> > rgb[index] = pixel> > else:> > pixel = int(buffer[0] * GAMMA_BIT_PRECISION + 0.5)> > pixel = clamp(pixel,0,GAMMA_BIT_PRECISION-1)> > # set the color and alpha> > if color == 3:> > alpha[index+0] = alpha[index+1] = > > alpha[index+2] = clientWindow.frame.gammaTable[pixel]> > else:> > rgb[index] = > > clientWindow.frame.gammaTable[pixel]> > > > > > # ...> >> > # create an empty rgb and alpha tile> > tileRGB = wx.BitmapFromBuffer( tileWidth, tileHeight, rgb )> > tileAlpha = wx.BitmapFromBuffer( tileWidth, tileHeight, alpha )> > > > # set up main device to render to the current> > # buffers> > dc = wx.BufferedDC( None,clientWindow.colorBuffer )> > dca = wx.BufferedDC( None,clientWindow.alphaBuffer )> > > > # draw tiles> > dc.DrawBitmap( tileRGB, txl, (clientWindow.height-tileHeight)-tyl )> > dca.DrawBitmap( tileAlpha, txl, (clientWindow.height-tileHeight)-tyl )> >> >> > I'm no python expert (as you can tell), but I'm trying.. :)> >> > I started to re-write this function but I'm confused on how to do:> >> > > Reshape the array into a 3D array (i.e., a rectangular array of RGBA> > > values)> >> > this without using a for loop.> > Yes, easily. No Python loops (although plenty of C-level loops.) (I > think you are using Numeric -- a ancient predecessor of numpy. However, > I think these operations work in Numeric.)> > > Again I create a small test case. The values will be in the order > rrrrggggbbbb to start with, and rgbrgbrgbrgb afterwards.> > Create a test array and examine it:> >>> a = numpy.frombuffer('rrrrggggbbbb', dtype='S1')> >>> a> array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b'], > dtype='|S1')> > Isolate each color component (here height*width = 4)> >>> a.shape = (3,4)> >>> a> array([['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b']],> dtype='|S1')> > Transpose it. (This creates a new array by copying efficiently.)> >>> b = a.transpose()> >>> b> array([['r', 'g', 'b'],> ['r', 'g', 'b'],> ['r', 'g', 'b'],> ['r', 'g', 'b']],> dtype='|S1')> > Reset it's shape to be a width*height array of rgb's.> >>> b.shape = (2,2,3)> >>> b> array([[['r', 'g', 'b'],> ['r', 'g', 'b']],> > [['r', 'g', 'b'],> ['r', 'g', 'b']]],> dtype='|S1')> > Put it out in byte array form:> >>> b.tostring()> 'rgbrgbrgbrgb'> > > Done.> > > Gary Herron> > > >> > -M> >> >> > > Date: Thu, 15 May 2008 13:46:06 -0700> > > From: gherron at islandtraining.com> > > CC: python-list at python.org> > > Subject: Re: How do I use the unpack function?> > >> > > Marlin Rowley wrote:> > > > Gary,> > > >> > > > I'm getting streaming tile data from a renderer in order to allow the> > > > user to see the rendering of tiles in real-time to create the total> > > > image. I'm NOT reading an entire image scanline-by-scanline. The> > > > renderer streams in a series of floats (for each tile) and I build> > > > this tile up from each individual color component passed in. I then> > > > convert it to a small bitmap and blit() it to the window that will> > > > eventually make up my entire image. I'm just wanting to make the> > > > process as fast as the renderer can render the tiles. I've noticed on> > > > scenes that aren't very complex for the renderer that my python > > script> > > > is spending most of it's time drawing while the renderer is already> > > > done. What you've given me has sped up the drawing a lot, but I'm> > > > hungry for more optimization!> > > >> > > > There is no file format to be read. The data is raw bytes and can be> > > > any format.> > >> > > You are misinterpreting what I mean by a format. All data is a string> > > of bytes, and interpreting that string of bytes to have some particular> > > form is applying a format to it. Your particular format is: each 4> > > bytes represents a float, and a string of such floats give the RGBA> > > values for a rectangle (of some size) of pixels. I doubt that you are> > > the first ever to use that particular format to encode an image, but I> > > also don't believe it matches any of the standard image formats.> > >> > > So... There is still hope to use already written tools to decode your> > > format.> > >> > > Here's a hint on how to use numpy for decoding a byte string into an> > > array of floats. My example byte string is a hand coded string of just> > > 12 bytes -- you should replace that with a whole row or better yet, a> > > whole tile's worth of bytes.> > >> > > >>> import numpy> > > >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'> > > >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)> > > >>> b> > > array([ 1., 2., 3.], dtype=float32)> > >> > >> > > If you want to use the array module instead:> > >> > > >>> import array> > > >>> a = array.array('f')> > > >>> a.fromstring(byteString)> > > >>> a> > > array('f', [1.0, 2.0, 3.0])> > >> > >> > > In either case ANY number of bytes can be decoded into an array of> > > floats, in one highly efficient call from Python.> > >> > > What you do with that array of float afterwards is up to you....> > >> > > If I read your note correctly, here's what I'd do to turn the array of> > > bytes into an image of a tile to be displayed on the screen.> > >> > > Get the whole tile's worth of bytes with one read into a single string.> > > Decode that string into an array of floats (as above).> > > Reshape the array into a 3D array (i.e., a rectangular array of RGBA> > > values)> > > Convert that array of floats into an array of 8-bit integers (scaling> > > all by 255).> > > Extract (via tostring) that array into a string of bytes.> > > Send that string of bytes to the graphics system as an RGBA array of> > > pixels.> > >> > > Each of these calls is one Python call into a highly efficient library.> > > This is using Python as a, so called, glue language.> > >> > > Gary Herron> > >> > >> > >> > >> > >> > >> > >> > > >> > > > > Date: Thu, 15 May 2008 10:09:45 -0700> > > > > From: gherron at islandtraining.com> > > > > CC: python-list at python.org> > > > > Subject: Re: How do I use the unpack function?> > > > >> > > > > John Machin wrote:> > > > > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> > > wrote:> > > > > >> > > > > >> Marlin Rowley wrote:> > > > > >>> > > > > >>> All:> > > > > >>>> > > > > >>> I've got a script that runs really slow because I'm reading > > from a> > > > > >>> stream a byte at a time:> > > > > >>>> > > > > >>> // TERRIBLE> > > > > >>> for y in range( height ):> > > > > >>> for color in range(4):> > > > > >>> for x in range( width ):> > > > > >>> pixelComponent = fileIO.read(4)> > > > > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE> > > > > >>>> > > > > >> > > > > > [snip]> > > > > > Perhaps the OP might be able to use the Python Imaging Library > > (PIL)> > > > > > instead of reinventing an image-file handler.> > > > > >> > > > >> > > > > Indeed. That's why my original answer included the line:> > > > > There are probably better ways overall, but this directly answers> > > > > your question.> > > > >> > > > > Other possibilities.> > > > >> > > > > I don't recognize the file format being read in here, but if it is a> > > > > standard image format, the PIL suggestion is a good way to go.> > > > >> > > > > Or, if it is an image of not too enormous size, read the *whole* > > thing> > > > > in at once.> > > > >> > > > > Or rather than manipulate the array by carving off 4 bytes at a > > time,> > > > > just index through it in 4 byte chunks:> > > > > for i in range(width):> > > > > buffer = unpack("!f", pixelComponent[4*i:4*i+4])> > > > >> > > > > Or> > > > > for i in range(0,4*width,4):> > > > > buffer = unpack("!f", pixelComponent[i:i+4])> > > > >> > > > > Or> > > > > Use numpy. Create an array of floats, and initialize it with the > > byte> > > > > string, making sure to take endianess int account. (I'm quite > > sure this> > > > > could be made to work, and then the whole operation is > > enormously fast> > > > > with only several lines of Python code and *no* Python loops.> > > > >> > > > > Or> > > > > ...?> > > > >> > > > > Gary Herron> > > > >> > > > > > --> > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > > >> > > > >> > > > > --> > > > > http://mail.python.org/mailman/listinfo/python-list> > > >> > > > > > ------------------------------------------------------------------------> > > > Windows Live SkyDrive lets you share files with faraway friends. > > Start> > > > sharing.> > > > > > <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> > > --> > > http://mail.python.org/mailman/listinfo/python-list> >> > ------------------------------------------------------------------------> > Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it > > out! > > <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Stay in touch when you're away with Windows Live Messenger.
http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_messenger_052008
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From bj_666 at gmx.net  Tue May 13 03:22:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 07:22:05 GMT
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de> <3T7Wj.134606$rd2.31796@pd7urf3no>
Message-ID: <68ststF2uo1qcU1@mid.uni-berlin.de>

On Tue, 13 May 2008 03:25:51 +0000, Yves Dorfsman wrote:

> Marc 'BlackJack' Rintsch wrote:
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing. I
>>> find this unsatisfactory...
>> 
>> Get over it?
> 
> Than what's the point of wanting a better language if every time we run in 
> something that looks wrong, or something that could be done better we should 
>   just "get over it" ?

That advice wasn't for every time something looks wrong but this
particular one.  You can solve it with `operator.itemgetter()` but that
means importing another module and calling a function which looks much
more "heavy weight" to me than one reference to an unused object which
might go away at the end of the function anyway soon.

Ciao,
	Marc 'BlackJack' Rintsch


From nick at craig-wood.com  Sat May  3 05:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 04:30:03 -0500
Subject: portable fork+exec/spawn
References: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>
	<mailman.457.1209739717.12834.python-list@python.org>
Message-ID: <slrng1o9ia.7q6.nick@irishsea.home.craig-wood.com>

Jean-Paul Calderone <exarkun at divmod.com> wrote:
> >For jobs which require interactivity ie send input, receive output,
> >send input, receive output, ... it doesn't work well.  There isn't a
> >good cross platform solution for this yet.  pyexpect works well under
> >unix and is hopefully being ported to windows soon.
> 
>  There is a good cross-platform solution, in fact.  It's Twisted's
>  spawnProcess API, which works on POSIX and Windows, supports supports
>  sending and receiving, and doesn't have deadlock issues since it's
>  event-driven.

It took me a while but I found the documentation on this eventually

  http://twistedmatrix.com/documents/current/api/twisted.internet.interfaces.IReactorProcess.html

Looks interesting - I'll have to try it next time I'm reaching for
pexpect

Thanks

Nick
-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From joe.p.cool at googlemail.com  Sun May 25 17:32:00 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Sun, 25 May 2008 14:32:00 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>

On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?

I saw this "don't need it" pattern in discussions about the ternary
"if..else" expression and about "except/finally on the same block
level".
Now Python has both. Actually it is very useful to be able to
distinguish
between inside and outside. This is obvious for real world things e.g.
your
TV. Nobody likes to open the rear cover to switch the channel. Similar
arguments apply to software objects. "data hiding" is a harsh name, I
would
call it "telling what matters". The need for this becomes
indispensable in
really big software packages like the Eclipse framework with approx.
100000
classes. If you cannot tell the difference between inside and outside
you
are lost.

> In Python, the philosophy "we're all consenting adults here" applies.

Please don't sell a missing feature as a philosophy. Say you don't
need/want
it. But don't call it philosophy.

> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put.

It's *your* *decision* which uses will be available. Your explanation
appears
to me as a fear to decide.

> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore.

Littering your class definition with dozens of underscores is exactly
the
line noise we love to criticize in Perl.

> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?

Nearly every introduction to OOP? Please don't tell me that
encapsulation
does not mean "enforced restriction". If the language has no syntactic
support for encapsulation then it does not have encapsulation. Similar
argument applies to Java where programmers sometimes claim that Java
"has"
properties because of setCrap/getCrap.

__
Joe


From nospam at here.com  Sun May 18 15:34:34 2008
From: nospam at here.com (Dennis)
Date: Sun, 18 May 2008 20:34:34 +0100
Subject: python confusion possibly related to pickle
In-Reply-To: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
Message-ID: <xJqdnWLFfMVXGa3VnZ2dnUVZ8hidnZ2d@posted.plusnet>


Never mind. I solved it. I had a file called pickle in the same folder I 
was in when I ran python, and that's the file it was trying to import.

Duh @ me :s


Dennis wrote:
> 
> I have a problem that I don't understand at all. I run a python script, 
> which uses pickle, and it fails. That alone is, perhaps, no big deal.
> 
> The problem that's got me annoyed is that after getting said error I 
> close the shell window, open a new one, run the python interpreter and 
> type "import pickle" and get the error that the script I'd run earlier 
> caused. Why is this ?
> 
> To my knowledge, once python stopped running it didn't store anything 
> related to the last time it was run.


From kay.schluehr at gmx.net  Fri May  9 00:09:04 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 8 May 2008 21:09:04 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>

On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On behalf of the Python development team and the Python community, I
> am happy to announce the third alpha release of Python 2.6, and the
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not
> suitable for production environments.  We continue to strive for a
> high degree of quality, but there are still some known problems and
> the feature sets have not been finalized.  These alphas are being
> released to solicit feedback and hopefully discover bugs, as well as
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you.  If you find things broken or incorrect, please submit a bug
> report at
>
>    http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
>    http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
>    http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions.  If all goes
> well, next month will see the first beta releases of both, which will
> also signal feature freeze.  Two beta releases are planned, with the
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
>      http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry
>
> Barry Warsaw
> ba... at python.org
> Python 2.6/3.0 Release Manager
> (on behalf of the entire python-dev team)
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.8 (Darwin)
>
> iQCVAwUBSCORrnEjvBPtnXfVAQIK+QQAgEUtAvW7uo0BxMiT1bCAo2E9ZecWJ9xe
> DBgd/5IK8moITkqhqGAH5UvfytV6uPkOMgGIS/Uvk4hzhU3jwSopEIDJLFQ5nGtC
> lCzOHzkDjSNZ8Q2OOAI9mbSHY8grvVxCMB4X2SVXIEMZ6M/X1AcV2b0utp9O1w/l
> T/PEvP8U1uY=
> =2Tnb
> -----END PGP SIGNATURE-----

http://www.python.org/ftp/python/3.0/python-3.0a5.msi

Error 404: File Not Found

http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi

Error 404: File Not Found


From skanemupp at yahoo.se  Sat May 31 08:48:20 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 31 May 2008 05:48:20 -0700 (PDT)
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
Message-ID: <5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>

On 31 Maj, 04:04, John Henderson <jhenRemoveT... at talk21.com> wrote:
> globalrev wrote:
> > can i send and receive messages from a website using python?
>
> Absolutely.  But I'm not clear what you mean by "from a
> website".  Do you mean to use SMPP protocol to lodge and
> receive messages?  Or do you want access to your own cellular
> hardware from a web interface?
>
> > how would that work with costs? would the mobileowner pay both
> > ways?
>
> That depends on the country, the carrier and the offers/plans
> that carrier makes.  In most of the civilized world, SMS
> receivers pay nothing.
>
> John



i want to build a service where you can send an SMS with your
cellphone to my website and then the site will collect the data you
asked for and SMS it back.

so what components would i need for that?


From reid at reidster.net  Mon May 19 20:58:50 2008
From: reid at reidster.net (Reid Priedhorsky)
Date: Mon, 19 May 2008 19:58:50 -0500
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <pan.2008.05.20.00.58.50.596857@reidster.net>

On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:
>
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.  I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

I find this frustrating too, but not to the extent that I choose a
different language. pylint helps but it's not as good as a nice, strict
compiler.

> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded, so one will need lots of python
> processes on lots of computers, with the database software handling
> parallel accesses to the same or related data.  One could organize it
> as one python program for each url, and one python process for each
> http request, but that involves a lot of overhead starting up and
> shutting down python processes.  Or one could organize it as one
> python program for each url, but if one gets a lot of http requests
> for one url, a small number of python processes will each sequentially
> handle a large number of those requests.  What I am really asking is:
> Are there python web frameworks that scale with hardware and how do
> they handle scaling?

This sounds like a good match for Apache with mod_python.

Reid


From kyosohma at gmail.com  Tue May 27 12:13:44 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 09:13:44 -0700 (PDT)
Subject: how to reply to posts on google groups (and not reply to just 
	author)
References: <b8707517-a5f0-4ed9-ba1d-3a7bacb571f1@2g2000hsn.googlegroups.com>
Message-ID: <8badaef0-1483-4635-b26b-cd88f7033c68@d77g2000hsb.googlegroups.com>

On May 27, 10:44?am, davidj411 <davidj... at gmail.com> wrote:
> I want to reply to the goups and not author for ?an older post (from
> February) , but it seems i can only reply to the author (using google
> groups).
>
> ?Is there a way (within Google groups) to reply to an older post to
> keep that particular thread going instead of posting a new one (as i
> am here now doing - sorry about this being a non-python question.)

You might be able to use the CC functionality and put the c.l.py email
in there to accomplish it. But I really don't know if that will work.
Worth a try though. You can find the email address on the Python
website.

Mike


From Scott.Daniels at Acm.Org  Tue May 20 00:00:10 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 19 May 2008 21:00:10 -0700
Subject: Write bits in file
In-Reply-To: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <8sGdnS3nQNwg16_VnZ2dnUVZ_jqdnZ2d@pdx.net>

Monica Leko wrote:
> On May 18, 2:20 pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
> Yes.
> 
>> is the 10-bit bit-pattern to be stored at an arbitrary bit-position in
>> the file
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

You should know there is no single "natural" mapping of files to bit
orders; rather there are several distinct natural such orders.  Define
the mapping you prefer and implement it.  This is even worse than the
"byte sex" issue (go ahead, look it up).

--Scott David Daniels
Scott.Daniels at Acm.Org


From deets at nospam.web.de  Mon May  5 10:45:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 16:45:38 +0200
Subject: Pygame and PGU
References: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>
Message-ID: <688ktbF2rlolmU1@mid.uni-berlin.de>

Zaka wrote:

> Hi. I need some help to make map system in PGU. For exmple we have 2
> maps and when we leave first we enter to second.
> 
> 
> --------------------
>                    !
> 
> 
> ___________

What is a PGU? What is a map-system? And what is that ascii art above?

And what might you learn from reading this:

http://www.catb.org/~esr/faqs/smart-questions.html

Diez


From kylotan at gmail.com  Wed May 28 10:26:54 2008
From: kylotan at gmail.com (Ben Sizer)
Date: Wed, 28 May 2008 07:26:54 -0700 (PDT)
Subject: Using an object-relational mapper to convert between databases
Message-ID: <019cb83a-d4b6-445a-b616-da12b6fd6a48@j22g2000hsf.googlegroups.com>

Hello,

I'd like to be able to do the following:

 - open a connection to a MySQL or PostgreSQL database
 - read the schema and contents for one or more tables
 - create a new sqlite database file and open a connection to it
 - write out the previously-read tables and their contents to this new
database

I get the impression that the various object-relational mappers such
as SQLAlchemy and SQLObject can make this easier, especially if using
something like SQLAlchemy's autoloading capability to query the schema
from the DB rather than me having to explicitly specify it. But then
how easy is it to make a corresponding sqlite table and write the same
objects to it? I don't know how practical this is with SQLAlchemy, or
if a different ORM library would be more useful for this. And since
objects tend to be closely related to the database they are mapped to,
I don't know how easy it is to reflect them onto a second database.

I'd just like some advice and pointers from anybody who's tried
something similar to this or who knows the packages well enough to
point me in the right direction.

--
Ben Sizer


From skanemupp at yahoo.se  Mon May  5 10:29:04 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:29:04 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
Message-ID: <c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>

On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> wrote:
>
> > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> > Are you sure that:
>
> > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> > Check it with python.
>
> > --
> > Regards,
> > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> >>> import os
> >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>
> False
>
> but...it is there....
>
> >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>
> False
>
> does it matter if i use / or \? which si recommended?

i can find .png image in the same folder and when i just change
filename from snake.png to example1.mp3 it is false.

i renamed the file once, could that have anything to do with it?


From java.oke at gmail.com  Mon May 26 16:52:37 2008
From: java.oke at gmail.com (j.oke)
Date: Mon, 26 May 2008 13:52:37 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <358ec7c3-4a25-4591-a705-03446e074b20@25g2000hsx.googlegroups.com>

On 26 Mag, 01:25, "xah... at gmail.com" <xah... at gmail.com> wrote:
> For about the past 10 years, ...

Q: How many comp.lang.X trolls does it take to change a light bulb?

A: One, and Superman. One to hold the bulb, and Superman to screw the
planet.

-JO


From gagsl-py2 at yahoo.com.ar  Tue May 13 23:49:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 00:49:47 -0300
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua4kw9dgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 09:41:25 -0300, Iain King <iainking at gmail.com>  
escribi?:

> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.

I've seen you already answered your question. But are you sure that doing  
this is a good thing? If you try to be too clever or too helpful the  
interfase may become annoying at some times. You can't guess the user's  
intention or read his mind.
By example, what if I already have the desired file name copied in the  
clipboard? I don't want the file selector to pop up.

I completely *hate* Windows programs with a "Browse for folder" button  
that don't let me paste a name, neither start opened at the currently  
selected folder.

-- 
Gabriel Genellina



From fabiofz at gmail.com  Mon May 12 11:42:09 2008
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 12 May 2008 12:42:09 -0300
Subject: Pydev 1.3.17 Released
Message-ID: <cfb578b20805120842y14d9e45fs19156553773834ed@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.17 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Minor bug-fixes

Release Highlights in Pydev:
----------------------------------------------

* Pydev Package Explorer: projects that had the project folder in the
pythonpath did not show children items correctly.
* Debugger: Disable all works. Patch from: Oldrich Jedlicka
* Debugger: Problem when making a step return / step over
* Code-completion: Working for attributes found in a superclass
imported with a relative import
  Patches from Felix Schwarz:
      o Allow to configure an interpreter even if the workspace path
name contains spaces
      o Completion server does not work when the eclipse directory
contains spaces
      o Fix deletion of resources in pydev package explorer for Eclipse 3.4



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and
Jython development -- making Eclipse a first class Python IDE -- It
comes with many goodies such as code completion, syntax highlighting,
syntax analysis, refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com


From straton at lampsacos.demon.co.uk  Sun May 18 08:20:14 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 13:20:14 +0100
Subject: Write bits in file
In-Reply-To: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <g0p6u1$nk8$1$8300dec7@news.demon.co.uk>

You want your file considered as a sequence of bits rather
than a sequence of 8-bit bytes, do you? is the 10-bit
bit-pattern to be stored at an arbitrary bit-position in
the file, or is the whole file regularly subdivided
at 10-bit intervals?


Monica Leko wrote:
> Hi
> 
> I have a specific format and I need binary representation.  Does
> Python have some built-in function which will, for instance, represent
> number 15 in exactly 10 bits?


From rdahlstrom at directedge.com  Thu May 29 07:23:45 2008
From: rdahlstrom at directedge.com (Dahlstrom, Roger)
Date: Thu, 29 May 2008 07:23:45 -0400
Subject: [python-win32] How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
	<DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
	<79990c6b0805290422g5b61f3c5l65034ee6e5798178@mail.gmail.com>
Message-ID: <DE02840141C15249B2FAE5A61B40EA1C0429A5@jc1wsmail6.global.knight.com>

-----Original Message-----
From: Paul Moore [mailto:p.f.moore at gmail.com] 
Sent: Thursday, May 29, 2008 7:23 AM
To: Dahlstrom, Roger
Cc: Python-Win32 List; python-list at python.org
Subject: Re: [python-win32] How to get all the variables in a python shell

On 29/05/2008, Dahlstrom, Roger <rdahlstrom at directedge.com> wrote:
> I'd try looking at memcached (http://www.danga.com/memcached/apis.html).
>  No hacking or reimplementation of the interpreter would be necessary, and
> there's a Python api available.  I haven't used it for anything production related,
> but I have played with it a bit, and it's fast and stable.

Is memcached available for Windows, then? I've heard nice things about
it, but thought it was Unix-only.

Paul.


----------------------------

It is available for Windows, yes.  As a matter of fact, I've never used it on Unix.


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From bignose+hates-spam at benfinney.id.au  Fri May  2 09:17:28 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 23:17:28 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
Message-ID: <87r6ckzvyv.fsf@benfinney.id.au>

Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> writes:

> -On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
> >To my mind, the Python interpreter installed by a package as
> >distributed with the OS *is* OS territory and belongs in /usr/bin/.
> 
> That's the difference with a distribution, such as Linux, and full
> OSes , such as BSDs or commercial Unix variants. They prefer to keep
> a pristine state for the OS vendor files versus what the user can
> opt to install himself, hence the /usr/bin - /usr/local/bin
> separation.

Fine so far. /usr/local/ is certainly for "what the (system
administrator) user opts to install themselves".

> It effectively guarantees you can nuke /usr/local without ill
> consequences for your OS.

You say this as though it's a property that a GNU/Linux distribution
doesn't have. But the "keep /usr/local/ untouched by OS packages"
approach taken by GNU/Linux *also* means that /usr/local/ can be blown
away without ill consequences for the OS. So I don't see why you draw
that distinction here.

The difference seems to be that Python is an OS-installable package on
GNU/Linux, and thus gets installed to the OS-packaged location. So the
default Python installation should work.

Whereas if Python is *not* installed from an OS package, it's up to
the sys admin to ensure that it works -- not up to my program. So I
don't see the point in making it work by default, when what I want for
my program is that it works *with the default Python*, not with some
non-default installation.

-- 
 \       "Truth is stranger than fiction, but it is because fiction is |
  `\         obliged to stick to possibilities, truth isn't."  -- Mark |
_o__)                                   Twain, _Following the Equator_ |
Ben Finney


From johnjsal at NOSPAMgmail.com  Tue May 20 12:33:55 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 12:33:55 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
Message-ID: <027e4d96$0$25054$c3e8da3@news.astraweb.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
> the above code is pretty much of a no-no because it has quadratic runtime
> behavior.


What's that mean, exactly? Are you referring to both examples, or just the 
second one? 




From arnodel at googlemail.com  Tue May  6 02:06:02 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 07:06:02 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com>
	<fvohne$m0f$1@news.xmission.com>
	<96a41fd1-23ca-482f-9575-5123611ade8a@z72g2000hsb.googlegroups.com>
Message-ID: <m2d4o06k6t.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 5, 11:02 pm, dave <squareswallo... at yahoo.com> wrote:
>> On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>>
>>
>>
>> > dave <squareswallo... at invalid.com> writes:
>>
>> >> Hello,
>>
>> >> I made a function that takes a word list (one word per line, text
>> >> file) and searches for all the words in the list that are 'shifts' of
>> >> eachother.  'abc' shifted 1 is 'bcd'
>>
>> >> Please take a look and tell me if this is a viable solution.
>>
>> >> def shift(word, amt):
>> >>        ans = ''
>> >>        for letter in word:
>> >>                ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>> >>        return ans
>>
>> > In Python, if you want to build a string from lots of parts you can
>> > use ''.join(parts).  I think it is considered more efficient.
>>
>> what would be the best way to write a "ans = ans + chr" into a
>> ''.join(parts) ??
>
> Well if you do it once, that would be simply "ans += chr". Arnaud was
> referring to the case where you do it in a loop, like in your snippet.
> A direct translation to use ''.join would be:
>
> ans = ''.join(chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>               for letter in word)
>
> Of course it is simpler and more efficient if you factor out of the
> loop the subexpressions that don't need to be recomputed:
>
> ord_a = ord('a')
> shift = ord_a - amt
> ans = ''.join(chr((ord(letter) - shift) % 26 + ord_a)
>               for letter in word)
>
> George

Or keep the same layout as your original effort, but build a list of
chars instead of a string, then join them all at the end.

def shift(word, amt):
    shifted = ''
    ord_a = ord('a')
    shift = ord_a - amt
    for letter in word:
        shifted.append(chr((ord(letter) - shift) % 26 + ord_a))
    return ''.join(shifted)

(Which exactly the same as George's snippet, except that the generator
expression is unwound)

-- 
Arnaud


From petr.poupa at gmail.com  Mon May 12 12:19:48 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 09:19:48 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.986.1210607718.12834.python-list@python.org>
Message-ID: <ede112da-da8e-413f-8f03-8e9edb4e6323@d77g2000hsb.googlegroups.com>

On 12 Kv?, 17:54, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 08:34:07 -0700 (PDT), petr.po... at gmail.com wrote:
> >Hello,
> >I am beginner but so I need help. I have small script for receive data
> >from port 3883, but it print only once.
>
> >import socket
>
> >HOST = 'localhost'
> >PORT = 3883
> >s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >s.connect((HOST, PORT))
> >data = s.recv(2048)
> >s.close()
> >print 'receive data from server:', `data`
>
> >So I try to write cycle to this script, like this:
>
> >import socket
>
> >HOST = 'localhost'
> >PORT = 3883
> >s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >while 1:
> >    s.connect((HOST, PORT))
> >    data = s.recv(2048)
> >    s.close()
> >    print 'receive data from server:', `data`
>
> >But Python reporting:
>
> >Traceback (most recent call last):
> >  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
> ><module>
> >    s.connect((HOST, PORT))
> >  File "<string>", line 1, in connect
> >  File "C:\Python25\lib\socket.py", line 141, in _dummy
> >    raise error(EBADF, 'Bad file descriptor')
> >error: (9, 'Bad file descriptor')
>
> >Where is the mistake? I dont know.
>
> You cannot reconnect a socket.  You need to create a new one for each
> connection.  It's also almost certainly the case that the way you are
> receiving data is incorrect.  There is no guarantee that you will get
> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
> the bytes written to the socket by the peer will be returned by such
> a call.  Instead, you need a framing protocol to determine when all
> data has been received.  For example, you might length prefix the
> data, or you might insert a delimiter (or a terminator) at the end.  Or
> if there is exactly one message to receive, then you should just read
> until the recv call returns '', indicating EOF.
>
> Jean-Paul

ok thanks, but I am true greenhorn, so you think that the best way is
write new script?
Could you send me code if it isnt long, becase I have no idea and
unfortunately time as well.

Petr
Petr


From gnewsg at gmail.com  Sat May 31 15:36:36 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 31 May 2008 12:36:36 -0700 (PDT)
Subject: Question about files?
References: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>
	<INedneYt2rOlO9zVnZ2dnUVZ_qzinZ2d@earthlink.com>
	<a9501197-1f56-4cd6-9620-408ea5ef9df8@79g2000hsk.googlegroups.com>
Message-ID: <696821f8-33a6-47b1-874c-ca7a4bce5e2e@c58g2000hsc.googlegroups.com>

On 31 Mag, 21:28, corvettecra... at gmail.com wrote:
> On May 31, 3:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
>
>
> > On Sat, 31 May 2008 11:44:14 -0700 (PDT), corvettecra... at gmail.com
> > declaimed the following in comp.lang.python:
>
> > > I want to create a program where a user can type what ever they want
> > > to, have it saved to a file, and the be able to re-open it and read
> > > it. How would I do this? Thanks!
>
> > import os
> > os.system("edit") ? ? # may be Windows specific
>
> > ? ? ? ? Start with:http://www.catb.org/~esr/faqs/smart-questions.html
>
> > (or, to expand on it... Exactly what part of the task are you having
> > problems with? Opening files for read/write/update? Designing a command
> > set for an editor? Designing a GUI for a text editor; what toolkit, does
> > it have a generic text edit widget already? Do you really need to write
> > another text editor when there are so many available that come with most
> > operating systems (Windows: edit, notepad, maybe even wordpad;
> > UNIX/Linux type systems: vi, vim, gvim, emacs) or can be downloaded
> > (SciTE) )
>
> > --
> > ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> > ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> > ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> > ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> > ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/
>
> No, what I mean is for the user to input text directly into the python
> program

You can use raw_input() to ask user to type something, then use open()
to create a file and write in it.
http://docs.python.org/lib/bltin-file-objects.html

> then the program would save it to a file and display it after
> it is created.

What do you mean by "display"?
Open that file with a text editor? Print the content of the file on
screen?


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From univbgp100 at gmail.com  Sat May 24 03:39:05 2008
From: univbgp100 at gmail.com (Dhanabal)
Date: Sat, 24 May 2008 00:39:05 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP
Message-ID: <e58656c6-8102-4cfe-b5b9-85655cd877e1@f24g2000prh.googlegroups.com>

FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP visit ebooks.univdatabase.com


From alex.m.gusarov at gmail.com  Tue May 27 08:04:58 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 19:04:58 +0700
Subject: integration with browser
In-Reply-To: <ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
	<ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>
Message-ID: <ac6dcb3d0805270504u2a5dc362v544571a7b3b5b63b@mail.gmail.com>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
>
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.

Really, try WebKit - Safari browser uses it.
Last releases of PyQt4 (Qt, of course, too) includes QWebKit - WebKit wrappings.

--
Best regards, Alex Gusarov


From notbob at nothome.com  Thu May 22 12:25:41 2008
From: notbob at nothome.com (notbob)
Date: Thu, 22 May 2008 16:25:41 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<KfidnYdly6aMTKnVnZ2dnUVZ_qLinZ2d@comcast.com>
Message-ID: <98hZj.1157$5u.860@fe127.usenetserver.com>

On 2008-05-22, Larry Bates <larry.bates at websafe.com`> wrote:

> Check out the Pylons blog tutorial.  You will have a simple blog up and running 
> in less than 30 minutes and have a platform to extend it with as much 
> functionality as you want later on.
>
> Larry Bates
>
> Pylons blog tutorial:
>
> http://wiki.pylonshq.com/display/pylonscookbook/Making+a+Pylons+Blog

Thnx, Larry.  FYI: the above page doesn't exist:

"The page you were trying to reach does not exist. You may want to try a
search, or browse the site to find the page you were looking for."

....but, there's a link to a pylons cookbook, which I will explore.

nb


From arnodel at googlemail.com  Mon May 26 17:07:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 22:07:11 +0100
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <m2d4n86agw.fsf@googlemail.com>

"Russ P." <Russ.Paielli at gmail.com> writes:

> On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk> escribi?:
>>
>> >> I am also bothered a bit by the seeming inconsistency of the rules for
>> >> the single underscore. When used at file scope, they make the variable
>> >> or function invisible outside the module, but when used at class
>> >> scope, the "underscored" variables or functions are still fully
>> >> visible. For those who claim that the client should be left to decide
>> >> what to use, why is the client prohibited from using underscored
>> >> variables at file scope?
>>
>> > I don't remember why this is. I'll leave you to track down the
>> > rationale for this particular behaviour. ;-)
>>
>> There is no rationale because this is not how it works...
>> You can:
>> - import a module and access *all* of their names, even names prefixed with an underscore
>> - import any name from a module, even if it starts with an underscore
>> - import * from a module, and it will import all names listed in __all__, even if they start with an underscore
>>
>> Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.
>>
>> --
>> Gabriel Genellina
>
>
> Well, that's interesting, but it's not particularly relevant to the
> original point. By default, underscored variables at file scope are
> not made visible by importing the module in which they appear. But
> underscored member variables of a class *are* made visible to the
> client by default. That's seems at least slightly inconsistent to me.

Apart from the fact that modules and classes are very different ideas,
look at this code:

========================================
import random

class A(object):
    def __init__(self, val):
        self._val = val

class B(A):
    def f(self, other):
        return random.choice([self, other])._val

a = A(1)
b = B(2)

b.f(a)
========================================

So you want the last line to return 2 if b is chosen and raise a
ValueError if a is chosen.  Good luck implementing that!

        
> The issue here, for me at least, is not whether the data or methods
> should be absolutely hidden from the client. I'm perfectly willing to
> say that the client should have a back door -- or even a side door --
> to get access to "private" data or methods.
>
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.

Python is a dynamic language, attributes can be added to objects at
any time in their life.  Consider:

class A(object):
    private x # Suspend belief for a minute...
    def __init__(self, x):
        self.x = x

a = A()
a.x = 2 # What behaviour do you propose here?

> Is this a major issue? No. Is it a significant issue. Yes, I think so.
>
> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.
>
> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

I didn't use to be very fond of it either but I have to admit that it
conveys very useful information.

-- 
Arnaud


From mnordhoff at mattnordhoff.com  Sat May 10 09:26:29 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sat, 10 May 2008 13:26:29 +0000
Subject: Simple question
In-Reply-To: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <4825A285.3050002@mattnordhoff.com>

Gandalf wrote:
> my server is my computer and all i did way to install python on it.

But what web server program are you using? Apache? IIS? Lighttpd?
-- 


From gagsl-py2 at yahoo.com.ar  Fri May 16 01:16:53 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 02:16:53 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
	<op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
	<1e5bcefd0805151932ie56e5dcx999c5181ce799f27@mail.gmail.com>
Message-ID: <op.ua8eaft1x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 23:32:38 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> New mantra: Test to the interfaces (as in program to the interfaces) :)

Seems reasonable...

> However, I'm curious on how you would test the mathprogram.divide(x,y)
> function. But in this case I'm not testing the implementation. I don't  
> care
> how the divide process is done, only that it is done correctly (10/2 =  
> 5).
> Actually my posted example was meant to be like this:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = 5
>   #10/2 should be 5, so let's test if the method gets it right:
>   self.assertEquals(mathprogram.divide(dividend,divisor),  
> expected_result)

Mmm, it's hard to tell in this example what's the purpose of  
mathprogram.divide, because Python already knows how to divide numbers.  
The code above is certainly a way to test the function; but aren't we  
testing the *Python* operator / instead of our own code?
(I'm thinking of mock objects here [1] - this example is too simple,  
perhaps it's hard to get the idea, see the wikipedia article for a few  
other examples)

[1] http://en.wikipedia.org/wiki/Mock_object

-- 
Gabriel Genellina



From tnelson at onresolve.com  Wed May  7 15:52:05 2008
From: tnelson at onresolve.com (Trent Nelson)
Date: Wed, 7 May 2008 12:52:05 -0700
Subject: REMINDER: Python Sprint Weekend This Weekend!
Message-ID: <87D3F9C72FBF214DB39FA4E3FE618CDC6E249D3D17@EXMBX04.exchhosting.com>

Just a friendly reminder that this weekend is the Python sprint weekend!  Look forward to seeing everyone on #python-dev irc.freenode.net over the course of the weekend!

        Trent.

On 16 Apr, 18:52, Trent Nelson wrote:
>
>    Following on from the success of previous sprint/bugfix weekends and
>    sprinting efforts at PyCon 2008, I'd like to propose the next two
>    Global Python Sprint Weekends, taking place on the following dates:
>
>        * May 10th-11th (four days after 2.6a3 and 3.0a5 are released)
>        * June 21st-22nd (~week before 2.6b2 and 3.0b2 are released)
>
>    It seems there are a few of the Python User Groups keen on meeting
>    up in person and sprinting collaboratively, akin to PyCon, which I
>    highly recommend.  I'd like to nominate Saturday across the board
>    as the day for PUGs to meet up in person, with Sunday geared more
>    towards an online collaboration day via IRC, where we can take care
>    of all the little things that got in our way of coding on Saturday
>    (like finalising/preparing/reviewing patches, updating tracker and
>    documentation, writing tests ;-).
>
>    For User Groups that are planning on meeting up to collaborate,
>    please reply to this thread on python-dev at python.org and let every-
>    one know your intentions!
>
>    As is commonly the case, #python-dev on irc.freenode.net will be
>    the place to be over the course of each sprint weekend; a large
>    proportion of Python developers with commit access will be present,
>    increasing the amount of eyes available to review and apply patches.
>
>    For those that have an idea on areas they'd like to sprint on and
>    want to look for other developers to rope in (or just to communicate
>    plans in advance), please also feel free to jump on this thread via
>    python-dev@ and indicate your intentions.
>
>    For those that haven't the foggiest on what to work on, but would
>    like to contribute, the bugs tracker at http://bugs.python.org is
>    the best place to start.  Register an account and start searching
>    for issues that you'd be able to lend a hand with.
>
>    All contributors that submit code patches or documentation updates
>    will typically get listed in Misc/ACKS.txt; come September when the
>    final release of 2.6 and 3.0 come about, you'll be able to point at
>    the tarball or .msi and exclaim loudly ``I helped build that!'',
>    and actually back it up with hard evidence ;-)
>
>    Bring on the pizza and Red Bull!
>
>        Trent.


From __peter__ at web.de  Fri May 30 14:25:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 May 2008 20:25:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<4840407c$0$4845$9b622d9e@news.freenet.de>
Message-ID: <g1pgrg$nff$00$1@news.t-online.com>

"Martin v. L?wis" wrote:

>>> File
>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>>> line 281, in execute
>>>     sql = unicode(sql, self.Encoding)
>>> LookupError: unknown encoding: utf_8_euro
>> 
>> At the application (DABO) mailing list, they have pointed that this has
>> to be a Python issue.
> 
> It's definitely not a Python issue.
> 
>> As I'm a totally python newbie, I would ask if
>> somebody has experimented this kind of error, and if there is any known
>> solution. I've found no clue searching at Google right now.
> 
> The problem is that self.Encoding is incorrect - it should not be
> utf_8_euro. Instead, it should be UTF-8 (or perhaps utf_8). DABO
> shouldn't use locale.getdefaultlocale()[1], but
> locale.getpreferredencoding().

I think that is the effect of a bug:

>>> locale._parse_localename("en_US.UTF-8 at euro")
('en_US', 'utf_8_euro')

The function first normalizes the "@" away and then looks for it. Is that
the expected behaviour?

Peter


From skunkwerk at gmail.com  Fri May  9 00:30:32 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Thu, 8 May 2008 21:30:32 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>
Message-ID: <7e4721aa-4dac-466c-b884-6314ead136b6@q1g2000prf.googlegroups.com>

On May 8, 4:54 pm, castiro... at gmail.com wrote:
> On May 8, 5:45 pm, skunkwerk <skunkw... at gmail.com> wrote:
>
>
>
> > i'm getting the wrong output for the 'title' attributes for this
> > data.  the queue holds a data structure (item name, position, and list
> > to store results in).  each thread takes in an item name and queries a
> > database for various attributes.  from the debug statements the item
> > names are being retrieved correctly, but the attributes returned are
> > those of other items in the queue - not its own item.  however, the
> > model variable is not a global variable... so i'm not sure what's
> > wrong.
>
> > i've declared a bunch of workerthreads(100) and a queue into which
> > new requests are inserted, like so:
>
> > queue = Queue.Queue(0)
> >  WORKERS=100
> > for i in range(WORKERS):
> >         thread = SDBThread(queue)
> >         thread.setDaemon(True)
> >         thread.start()
>
> > the thread:
>
> > class SimpleDBThread ( threading.Thread ):
> >    def __init__ ( self, queue ):
> >                 self.__queue = queue
> >                 threading.Thread.__init__ ( self )
> >    def run ( self ):
> >                 while 1:
> >                         item = self.__queue.get()
> >                         if item!=None:
> >                                 model = domain.get_item(item[0])
> >                                 logger.debug('sdbthread item:'+item[0])
> >                                 title = model['title']
> >                                 scraped = model['scraped']
> >                                 logger.debug("sdbthread title:"+title)
>
> > any suggestions?
> > thanks
>
> I'll base this on terminology: if a model is in a brain (throughout
> the known universe), and a dollar's a dollar, it may not pay to build
> a computer out of brains.
>
> If man arises as a tool-carrier, we will carry tools, not people.
> Don't use Python to make people; make money, and not too much.  Pick a
> wage and you might get somewhere.

excuse me?


From jschroed at gmail.com  Thu May  8 22:50:20 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 19:50:20 -0700
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
	<mailman.829.1210298651.12834.python-list@python.org>
	<55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>
Message-ID: <4878ad7b0805081950x309c4f6s9b260261c39183e9@mail.gmail.com>

I do like one-liners and do not like regexps!  That code puts mine to
shame...  Thanks for the tip.  I'll use that one instead.

On Thu, May 8, 2008 at 7:40 PM, Dan Bishop <danb_83 at yahoo.com> wrote:

> > On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com>
> wrote:
> > > I have a string (which I got from the names of my classes) and I would
> like
> > > to print out my CamelCase classes as titles.
> >
> > > I would like it to do this:
> >
> > >>>> my_class_name = "ModeCommand"
> > > ## Do some magic here
> > >>>> my_class_name
> > > 'Mode Command'
> >
> > > Anyone know any easy way to do this?  Thanks.
>
> On May 8, 9:04 pm, "Eric Wertman" <ewert... at gmail.com> wrote:
> > Something like this.  I'm sure there are other ways to do it.
> >
> > import re
> >
> > def addspace(m) :
> >         return ' ' + m.group(0)
> >
> > strng = "ModeCommand"
> >
> > newstr =  re.sub('[A-Z]',addspace,strng)
> >
> > print newstr.strip()
>
> Yes, there are other ways to do it.  If, for example, you like one-
> liners but not regexps:
>
> def add_spaces(text):
>    return text[:1] + ''.join((' ' + char if char.isupper() else char)
> for char in text[1:])
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Sun May 11 15:55:31 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 19:55:31 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
Message-ID: <Xns9A9BD4DD2720duncanbooth@127.0.0.1>

7stud <bbxx789_05ss at yahoo.com> wrote:

>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" +
> self.matrix[c][0] + "_other.txt\"" 

It wouldn't exactly result in either of the error messages you posted, but 
I expect the spurious quote marks round the filename will be giving you 
problems.

Surely you want the filename to be something like 'proctemp\fred_other.txt' 
rather than '"proctemp\fred_other.txt"' with the spurious double quotes?


From paul at science.uva.nl  Tue May 13 06:54:39 2008
From: paul at science.uva.nl (Paul Melis)
Date: Tue, 13 May 2008 12:54:39 +0200
Subject: Backslash frowned upon?
In-Reply-To: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <g0bs1f$8o7$1@info.science.uva.nl>

wxPythoner at gmail.com wrote:
> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?

Yes, it's still valid to use in a script.

See http://docs.python.org/dev/3.0/whatsnew/3.0.html for the big changes 
coming with 3.0

Paul


From takaurai at gmail.com  Thu May 29 06:32:26 2008
From: takaurai at gmail.com (=?ISO-2022-JP?B?GyRCJD8kKxsoQg==?=)
Date: Thu, 29 May 2008 03:32:26 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
References: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>
	<d55abb23-1f0f-4724-8feb-4f68f0857711@z16g2000prn.googlegroups.com>
Message-ID: <fde0c5a6-d710-40da-9625-8df000a01a3a@q24g2000prf.googlegroups.com>

thanks for your reply.

I tried below python codes with "Py_single_input" instead of
"Py_file_input".

sample 1 : result is INCOMPLETE
for i in range(3):\n

sample 2 : result is COMPLETE(I want to get INCOMPLETE or something)
for i in range(3):\n\tprint i
   or
for i in range(3):\n\tprint i\n

"Py_single_input" and "Py_file_input" seem the same. How come?

> Plz check details in Grammar/Grammar from python source distribution

thanks. I challenge it.

--urai


From rossgk at gmail.com  Wed May 28 12:04:33 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 09:04:33 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
Message-ID: <2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>

On May 28, 12:01 pm, RossGK <ros... at gmail.com> wrote:
> I'm a newbie to python threads, and playing with some simple client
> server stuff and lots of print statements.
>
> My server thread launched with
>      self.worker = WorkerThread(self)
> completes an interaction and then if I check on it's status with
>      print "Status:", self.worker        I get        Status none
>
> A client thread behaves differently. Launched as
>       self.clientWorker( = ClientThreadself)
> when it finishes it's work, I instead get:
>      Status: <ClientThread(Thread-2, stopped)>
>
> If I check the isAlive status on each of those, self.worker.isAlive
> throws an exception, 'cause there is nothing there anymore to check
> isAlive on.  But self.clientWorker comes back as False, since it is a
> stopped thread and hasn't gone away (which I'd like it to after it
> finishes its work).
>
> So my question is when a thread finishes its work how do I more
> predictably control whether it is just stopped, or goes away all
> together?   I don't want to do a double nested 'if' statement to check
> if it exists before I check if it's alive.



Pls ignore the obvious typos, this isn't a syntax question and google
groups seems to be messing with my typing and spacing(!)  e.g.
>       self.clientWorker( = ClientThreadself)
should have read
       self.clientWorker = ClientThread(self)

As I swear I had typed it...




From cbc at unc.edu  Mon May 19 14:01:48 2008
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 19 May 2008 14:01:48 -0400
Subject: Python and Plone Boot Camps in Chapel Hill, NC
Message-ID: <4831C08C.1090706@unc.edu>

Triangle (NC) Zope and Python Users Group (TriZPUG) is proud to open 
registration for our fourth annual ultra-low cost Plone and Python 
training camps, BootCampArama 2008:

http://trizpug.org/boot-camp/2008/

Registration is now open for:

PyCamp: Python Boot Camp, August 4 - 8

Plone Boot Camp: Customizing Plone, July 28 - August 1

Advanced Plone Boot Camp: Plone 3 Techniques, August 4 - 8

All of these take place on the campus of the University of North 
Carolina at Chapel Hill in state of the art high tech classrooms, with 
free mass transit, low-cost accommodations with free wireless, and 
convenient dining options.

Plone Boot Camp is taught by Joel Burton, twice chair of the Plone 
Foundation. Joel has logged more the 200 days at the head of Plone 
classrooms on four continents. See plonebootcamps.com for dozens of 
testimonials from Joel's students.

PyCamp is taught by Chris Calloway, facilitator for TriZPUG and 
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From bignose+hates-spam at benfinney.id.au  Fri May 23 22:23:13 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 12:23:13 +1000
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <87hccocuem.fsf@benfinney.id.au>

Antoon Pardon <apardon at forel.vub.ac.be> writes:

> The answers seemed to be negative. Since I really would like this
> behaviour

I didn't see you explain *why* you think this behaviour is desirable.
You've already had responses that explained why it leaves you open to
more bugs when code only works if tests run in a specific order.

> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?

No and no. If anything, unit test cases should be run in a completely
*non*-deterministic sequence.

-- 
 \         "In prayer, it is better to have a heart without words than |
  `\                          words without heart."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney


From upton at virginia.edu  Fri May 16 14:28:27 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 14:28:27 -0400
Subject: writing python extensions in assembly
In-Reply-To: <a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
	<mailman.1236.1210959884.12834.python-list@python.org>
	<a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
Message-ID: <5504f9ac0805161128t798f630br721c6a65e92fdbd9@mail.gmail.com>

On Fri, May 16, 2008 at 2:08 PM, inhahe <inhahe at gmail.com> wrote:
>
> "Dan Upton" <upton at virginia.edu> wrote in message
> news:mailman.1236.1210959884.12834.python-list at python.org...
>
>
>>
>> On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>>>
>>> Why wouldn't the compilers support it? It's part of the x86
>>> architexture,
>>> isn't it?
>>
>> Yeah, but I don't know if it uses it by default, and my guess is it
>> depends on how the compiler back end goes about optimizing the code
>> for whether it will see data access/computation patterns amenable to
>> SIMD.
>
> perhaps you explicitly use them with some extended syntax or something?
>

Hey, I learned something today.

http://www.tuleriit.ee/progs/rexample.php

Also, from the gcc manpage, apparently 387 is the default when
compiling for 32 bit architectures, and using sse instructions is
default on x86-64 architectures, but you can use -march=(some
architecture with simd instructions), -msse, -msse2, -msse3, or
-mfpmath=(one of 387, sse, or sse,387) to get the compiler to use
them.

As long as we're talking about compilers and such... anybody want to
chip in how this works in Python bytecode or what the bytecode
interpreter does?  Okay, wait, before anybody says that's
implementation-dependent: does anybody want to chip in what the
CPython implementation does?  (or any other implementation they're
familiar with, I guess)


From casey.mcginty at gmail.com  Wed May 28 01:09:27 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Tue, 27 May 2008 19:09:27 -1000
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
Message-ID: <ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>

>            self.event[] = Event()   *# Seems this is not allowed ?? *
>

self.event = [Event()]

- Casey
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From znfmail-pythonlang at yahoo.com  Tue May 27 11:13:49 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Tue, 27 May 2008 11:13:49 -0400
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
	<69vg5qF34vemeU1@mid.uni-berlin.de>
	<bf1929ee-647b-4046-b1ea-d693020503a2@w1g2000prd.googlegroups.com>
Message-ID: <g1h8fh$f87$1@aioe.org>

Can you consider a webservice under something like CherryPY, rather than 
cgi? It may provide more options.


"Rohan" <nrohan at gmail.com> wrote in message 
news:bf1929ee-647b-4046-b1ea-d693020503a2 at w1g2000prd.googlegroups.com...
> Thanks Diez for your suggestion.
>
>>
>> The only way I can think of is to regularly output something inside the 
>> CGI,
>> and thus make it fail in the very moment the pipe is closed.
>>
>
> I also thought of this, but this looks little crude approach.
> The problem seems very generic I was wondering if it could be handled
> more
> gracefully by some configuration in Apache or cgi script.
>
> Apache process handling the request would close the connection with
> client,
> but it won't notify anything to spawned CGI process, so it keeps
> running.
>
> 




From yves at zioup.com  Mon May 12 23:25:51 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:25:51 GMT
Subject: anonymous assignment
In-Reply-To: <68q50pF2u2t25U2@mid.uni-berlin.de>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de>
Message-ID: <3T7Wj.134606$rd2.31796@pd7urf3no>

Marc 'BlackJack' Rintsch wrote:
>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>> But you still have have a variable that's using memory for nothing. I
>> find this unsatisfactory...
> 
> Get over it?

Than what's the point of wanting a better language if every time we run in 
something that looks wrong, or something that could be done better we should 
  just "get over it" ?


Yves.


From larry.bates at websafe.com`  Fri May 30 09:43:39 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 30 May 2008 08:43:39 -0500
Subject: Generating event from event
In-Reply-To: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
Message-ID: <Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>

Gandalf wrote:
> I have script which being triggered by pressing CTRL+Right mouse click
> from any place in my O.P , Now I need to generate automatically event
> like copy my selected item or double clicking the right mouse cursor
> without user interfering.
> how can i implement this width python?
> 
> 
> thanks!
You didn't tell us enough to answer your question.  What GUI are you
using?  Nearly every one of them that I'm aware of allow you to register
handlers for such events.

-Larry


From alexelder at gmail.com  Mon May  5 06:47:51 2008
From: alexelder at gmail.com (alexelder at gmail.com)
Date: Mon, 5 May 2008 03:47:51 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <7aadfbc6-f42a-4c63-91a2-a90acf9376af@r66g2000hsg.googlegroups.com>

On May 5, 10:25 am, n00m <n... at narod.ru> wrote:
> os:windows
> ml = 'line1 \n line2 \n line3 \n'
> exec('some.exe "' + ml + '"')
>
> and some.exe get only 'line1'...

I think your problem lies with your "\n", escape chars. Assuming these
are not arguments and are indeed separating statements, I suggest
replacing "\n", with "&". That way, the command shell probably wont
complain.

An example:
ml = 'line1 & line2 & line3'

Alex.


From martin at v.loewis.de  Sun May 25 23:28:33 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 26 May 2008 05:28:33 +0200
Subject: set partition question
In-Reply-To: <3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
Message-ID: <483a2e61$0$21475$9b622d9e@news.freenet.de>

> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...), arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any of python's set operations
> or combination of those operations.

That still allows for trivial solutions:

Given s0, and s1..sn, the following Python code outputs a Python
fragment that, when run, returns s0:

print "set()",
for e in s0:
    print ".union(set([%s]))" % repr(e),

For s0=set([1,2,3]), I get

set() .union(set([1])) .union(set([2])) .union(set([3]))

Or, more trivially,

print repr(s0)

which gives me

set([1,2,3])

In either case, s0 is generated through "any of python's set
operations".

Regards,
Martin


From sjmachin at lexicon.net  Sun May 11 01:04:05 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 22:04:05 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com>
Message-ID: <da405010-4318-4f3e-9f33-001a4edcb662@k10g2000prm.googlegroups.com>

On May 11, 1:24 pm, Mensanator <mensana... at aol.com> wrote:
> On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Define better.
>
> >>> f = ['','','Fizz']*100
> >>> b = ['','','','','Buzz']*100
> >>> for i in xrange(1,100):
>
>         fb = f[i-1]+b[i-1]
>         if fb=='':
>                 print i
>         else:
>                 print fb

You seem to have an unfortunate fixation on 100. Consider changing the
above instances to 34, 20, and 101.


From half.italian at gmail.com  Thu May  1 21:17:37 2008
From: half.italian at gmail.com (Sean DiZazzo)
Date: Thu, 1 May 2008 18:17:37 -0700 (PDT)
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and 
	'NoneType'
References: <mailman.440.1209688547.12834.python-list@python.org>
Message-ID: <ba8ea819-82f5-4cac-82ed-f77ebb6ef35a@q24g2000prf.googlegroups.com>

On May 1, 5:21?pm, "Jordan Harry" <jha... at EmeryWeiner.org> wrote:
> I'm trying to write a simple program to calculate permutations. ?I created a file called "mod.py" and put the following in it:
>
> def factorial(n):
> ? ? a = n
> ? ? b = n
> ? ? while a>0 and b>1:
> ? ? ? ? n = (n)*(b-1)
> ? ? ? ? b = b-1
>
> def perm(n, r):
> ? ? a = factorial(n)
> ? ? b = factorial(n-r)
> ? ? q = a / b
> ? ? print q
>
> Then I went back to IDLE and input the following:
>
> >>> import mod
> >>> mod.perm(5, 4)
>
> I recieved the following error message:
>
> Traceback (most recent call last):
> ? File "<pyshell#1>", line 1, in <module>
> ? ? mod.perm(5, 4)
> ? File "C:\Python25\mod.py", line 27, in perm
> ? ? q = a / b
> TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'
>
> I have no idea how to fix it. ?I'm pretty new to Python. ?I have IDLE 1.2.2 and Python 2.5.2,
>
> Please help.

Your factorial function needs to return something.

~Sean


From cokofreedom at gmail.com  Wed May 21 09:28:35 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 06:28:35 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>

On May 21, 3:12 pm, "boblat... at googlemail.com"
<boblat... at googlemail.com> wrote:
> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
> > Although that solution is pretty, it is not the canonical solution
> > because it doesn't cover the important case of "if" bodies needing to
> > access common variables in the enclosing scope.  (This will be easier
> > in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
> > IMHO closer to a canonical solution to this FAQ.
>
> Hello everybody,
>
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.
>
> Thanks again,
> robert
>
> PS: Since I'm testing only three REs, and I only need the match
> results from one of them, I just re-evaluate that one.

Is it really a lot to change to have it

if my_re1.match(line):
  match = my_re1.match(line)
elseif my_re2.match(line):
  match = my_re2.match(line)
elseif my_re3.match(line):
  match = my_re3.match(line)

?

That reads clearly to me...


From srinivas.puvvala at gmail.com  Wed May 21 08:31:50 2008
From: srinivas.puvvala at gmail.com (srinivas)
Date: Wed, 21 May 2008 05:31:50 -0700 (PDT)
Subject: about python modules
Message-ID: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>

hi friends i am new to python programming.
i am using Python 2.5 and IDLE as editor.
i have developed some functions in python those will be calling
frequently in my main method .
now i want to know how to import my functions folder to python in
sucha way that the functions in functions folder should work like
python library modules .

i have  python in folder C:\python25\..
and functions folder D:\programs\Functions\

pls help me friends how to do that.


From notnorwegian at yahoo.se  Mon May 19 23:34:22 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 20:34:22 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
Message-ID: <3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>

i am confused.

x=5
y=5

x==y -> True
x is y -> True

shouldnt x is y return False since they shouldnt(dont?) point to the
same place in memory, they just store an equal value?



From ivan.illarionov at gmail.com  Tue May 13 00:22:52 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 04:22:52 +0000 (UTC)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>
Message-ID: <g0b52s$53r$1@news.mtu.ru>

On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:

> On May 12, 11:02?pm, Jimmy <mcknight0... at gmail.com> wrote:
>> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>>
>>
>>
>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
>> > wrote:
>> > > Well, i know it may be a little non-python thing, however, I can
>> > > think
>> > > ?of no place better to post this question :)
>>
>> > > ?can anyone tell me, in python, how to obtain some information of
>> > > ?a running program?
>> > > ?paticularly, if i am playing some music in audacious or other
>> > > ?media player, how can i get the the name and some other info of
>> > > ?current playing song? It seems that audicious doesn't output on
>> > > ?run-time --
>> > > ?http://mail.python.org/mailman/listinfo/python-list
>>
>> > In most cases, you'll probably need some sort of API, either in the
>> > program itself or through some sort of plugin, that lets external
>> > programs query it. ?For instance, there are some plugins to WinAmp
>> > that allow external programs (like Last.FM or Mog-O-Matic) to see
>> > what track is currently playing. ?You may also be able to do
>> > something like get the window title (again, WinAmp's title bar
>> > usually includes the artist and title) and parse it out. ?I don't
>> > really know that there's anything specific to Python for accessing
>> > these though, and it may vary depending on media player.
>>
>> > Just my two cents...
>>
>> > -dan
>>
>> thanks!
>>
>> In linux, I am always obfuscated by sort of APIs. Like how to get title
>> information of a running program? where am I supposed to find these
>> APIs
> 
> I think you're a little confused about how computers work in general and
> what a program can do, and you expect there is some general superprogram
> able to decipher what an arbitrary other running program does. The
> sentence "how to get title information of a running program" doesn't
> even make sense for most programs since they don't play music anyway.
> 
> Your best bet is if the *specific* program you're interested in (e.g.
> audacious) exposes this information programmatically in some way. It's
> up to the developers of this application if and how they choose to do
> it. Even if they do it, there's no requirement that the same API will
> work for any other program of the same category, unless there is some
> popular industry standard that most applications implement.
> 
> In short, you'll get more helpful replies at the audacious newsgroup.
> 
> HTH,
> George

George, have you read my post in this thread? What OP wants is actually 
possible and it's quite easy. X server is the "superprogram" that knows 
the names of all GUI window titles.

-- Ivan


From iainking at gmail.com  Tue May 13 10:06:07 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 07:06:07 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>
	<46508224-d4c6-4982-a29f-04d29b3d5a2c@m36g2000hse.googlegroups.com>
Message-ID: <7f058ac1-e3e9-4d56-adf5-45ccc105f078@z72g2000hsb.googlegroups.com>

On May 13, 2:43 pm, Iain King <iaink... at gmail.com> wrote:
> On May 13, 2:20 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>
>
>
> > Iain King wrote:
> > > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > > up a file selector.  This all works fine, but the first thing the user
> > > has to do when they open the dialog is select a file, so I would like
> > > the dialog to automatically call the onBrowse function as soon as the
> > > dialog opens.  However, I don't know how to do this.
>
> > > dlg.ShowModal()
> > > onBrowse()
>
> > > obviously doesn't work, and neither does the reverse.  I was hoping
> > > that the dialog would throw some kind of "I have been shown" event,
> > > but it doesn't (as far as I can tell).  How do I make the dialog do
> > > something as soon as it's been shown?
>
> > > Iain
>
> > If the only things on your modal dialog are Browse and cancel, just call the
> > wx.FileDialog directly and eliminate the intermediate modal dialog.  If not
> > don't bind the FileDialog to a button, just create an instance of it as the last
> >   you do in the __init__ method of the modal dialog code.
>
> > If this doesn't help, you will have better luck posting to wxpython newsgroup.
>
> > -Larry
>
> The dialog doesn't only let you call the file dialog, it does other
> stuff too.  Your suggestion of __init__ sounded promising, but neither
> giving the dialog an __init__() method nor an OnInit() method worked.
> Thanks anyway.
>
> Iain

After having a hunt through the wxpython mailing list archives I found
the answer:  the event is EVT_INIT_DIALOG:

dlg.Bind(wx.EVT_INIT_DIALOG, onInit, dlg)

work.  Thanks for the pointer.

Iain


From oyinbo55 at gmail.com  Sun May  4 08:42:48 2008
From: oyinbo55 at gmail.com (oyinbo55)
Date: Sun, 4 May 2008 05:42:48 -0700 (PDT)
Subject: matplotlib pylab plot() BadWindow error
Message-ID: <16f10cf9-a966-4492-891b-d6aedb9ad428@p25g2000hsf.googlegroups.com>

I am trying to use the pylab plot command on my laptop running Ubuntu
6.06 (Dapper).  Although the plot command works fine on my XP desktop
at work, I cannot open the plot window on the laptop.  I edited
matplotlibrc to change interactive: to "True".  In idle, I entered the
commands:
     >>> from pylab import *
     >>> plot([1,2,3])

The terminal window closed abruptly when I typed the closing
parenthesis.
I have been warned not to use the show() command in interactive mode.
I tried:
     oyinbo at oyinbo-laptop:~$ idle-python2.4 -n
In idle -n, I entered the sam two commands.  This time I got an error
message:
     The program 'idle-python2.4' received an X Window System error.
     This probably reflects a bug in the program.
     The error was 'BadWindow (invalid Window parameter)'.
       (Details: serial 2875 error_code 3 request_code 15 minor_code
0)
       (Note to programmers: normally, X errors are reported
asynchronously;
       that is, you will receive the error a while after causing it.
       To debug your program, run it with the --sync command line
       option to change this behavior. You can then get a meaningful
       backtrace from your debugger if you break on the gdk_x_error()
function.)

Using the Python prompt without idle, I got no error message, but the
window simply didn't open:

     oyinbo at oyinbo-laptop:~$ python
     Python 2.4.3 (#2, Mar  7 2008, 01:58:20)
     [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
     Type "help", "copyright", "credits" or "license" for more
information.
     >>> from pylab import *
     >>> plot([1,2,3])
     [<matplotlib.lines.Line2D instance at 0xb7bf04cc>]

Have I skipped a step?

Thanks for all the great information on your group.

Bill


From not_here at no_where.com  Sun May 18 20:56:30 2008
From: not_here at no_where.com (Brian)
Date: Sun, 18 May 2008 17:56:30 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <1f4Yj.60053$Fc1.23579@newsfe07.phx>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.

here is some non-text stuff that I have done within the 
  last two or three years

1. controlling and parsing thousands of label files 
several times per day, that are used by the factory to 
drive the printers that make product safety labels - 
code was easily approved by UL and CSA.
2. real-time control of platform in EMC lab for 
radiated emissions testing.
3. hi-speed data acquisition of 3 to 20 parameters 
during simulated abnormal operating conditions to 
demonstrate product compliance with product safety 
standards.
4. monitoring of several server logs, also sends email 
to me if it finds something it does not like.
5. parallel monitor/control systems for several 
greenhouses.


From mnikhil at gmail.com  Tue May 20 13:30:09 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:00:09 +0530
Subject: AttributeError: module object has no attribute
Message-ID: <g0v1r3$ikn$1@registered.motzarella.org>

I have recently written a small module. When I import the module, I 
always get the error


only when I do

 >>> from local.my.module import *

--
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute '/xyz/py/file'
---


but when I do the below, I do not get any error.

--
 >> import local.my.module
 >>
--

Any ideas on what could be wrong?


Thanks in advance.

Nikhil


From mccredie at gmail.com  Fri May  2 02:17:08 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 1 May 2008 23:17:08 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com> 
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
Message-ID: <7917a0b4-7af2-46f0-adec-33d3b191eb17@y22g2000prd.googlegroups.com>

On May 1, 10:50 pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 1, 11:46 pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
>
>
>
> > Yves Dorfsman wrote:
>
> > > In the following script, m1() and m2() work fine. I am assuming m2() is
> > > faster although I haven't checked that (loops through the list twice
> > > instead of once).
>
> > Well, let's check it:
>
> > $ python -m timeit -s "import x" "x.m1()"
> > 100000 loops, best of 3: 6.43 usec per loop
>
> > $ python -m timeit -s "import x" "x.m2()"
> > 100000 loops, best of 3: 8.34 usec per loop
>
> > As it turns out, m1 is faster than m2. The reason is that list
> > comprehensions do the loop in C, whereas the for-append pattern does the
> > loop on the Python level.
>
> > > Now what I am trying to do is something like m3(). As currently written
> > > it does not work, and I have tried different ways, but I haven't managed
> > > to make it work.
>
> > > Is there a possibility ? Or is m2() the optimum ?
>
> > > [...]
> > > def m1():
> > >   colours = [ e['colour'] for e in l ]
> > >   nums    = [ e['num']    for e in l ]
>
> > > def m2():
> > >   colours = []
> > >   nums    = []
> > >   for e in l:
> > >     colours.append(e['colour'])
> > >     nums.append(e['num'])
>
> > > #def m3():
> > > #  colours, nums = [ e['colour'], e['num'] for e in l ]
>
> > m3 doesn't work because you're building a list of 10 color/number pairs
> > that you're trying to unpack that into just two names. The working
> > "derivative" of m3 is m1, which is the most natural, fastest and
> > clearest solution to your problem.
>
> Another alternative is:
>
> from operator import itemgetter
>
> def m3():
>     colours, nums = zip(*map(itemgetter('colour','num'), l))
>
> It's slower than m1() but faster than m2(); it's also the most
> concise, especially if you extract more than two keys.
>
> George

Why deal with zip and unpacking? This seems more obvious to me:

colours, nums = map(itemgetter('colour'), l), map(itemgetter('num'),
l)

Matt


From jstucklex at attglobal.net  Mon May 26 19:42:20 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Mon, 26 May 2008 19:42:20 -0400
Subject: php vs python
In-Reply-To: <5IH_j.3432$tF1.2671@trnddc01>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com> <5IH_j.3432$tF1.2671@trnddc01>
Message-ID: <k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>

Curtis wrote:
> Paul Rubin wrote:
>> notbob <notbob at nothome.com> writes:
>>> Well, that's my actual question, then.  Is php really so bad I'm just
>>> wasting my time?  Or is it really the quickest way to blog 
>>> functionality?
>>
>> php is very easy to get started with and some big sites have been
>> written in it.  There is lots of low cost php hosting available.  It
>> is not as good a language as Python.  However, Python's advantages are
>> strongest in more complex projects.  For simple stuff, php is frankly
>> less hassle just because of its wide deployment and that extensive
>> function library that the blog post your quoted described as a bad
>> thing.  Python's libraries are not bad, but php's are more intensely
>> focused on web apps and includes what you need as part of the standard
>> build.  With Python, if you want a database adapter or web template
>> framework, you have to choose between a bunch of different ones and
>> download and configure it which often involves head scratching when
>> the auto-install stuff hits some quirk of your system.  With php, it's
>> all right there when you flip the switch.
>>
>> Knowing lots of languages is good for you.  php is probably your
>> quickest route to getting a rudimentary web app running.  Python
>> is a longer term project.  Do both.
> 
> PHP is more than capable for handling large projects, not just small 
> scripting jobs. However, Paul's right about PHP being more driven toward 
> web development, where as Python may be better for different types of apps.
> 
> Even then, I think your first reply was best, it just comes down to what 
> you have more fun writing. Both languages are equally capable of getting 
> the job done.
> 
> -- 
> Curtis

Not true.  PHP is quite capable of writing large, non-web based 
projects.  While it's non-browser based display capabilities are 
somewhat lacking (although there are third party libraries which help a 
lot), I've written some pretty complicated batch scripts in the past.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From rajarshi.guha at gmail.com  Wed May 14 12:13:42 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Wed, 14 May 2008 09:13:42 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <4ba3a7d9-19a8-4463-981c-dea90ee085fc@24g2000hsh.googlegroups.com>

Thanks to the all posters. This will be very useful!


From p.wallstedt at gmail.com  Thu May 15 11:03:40 2008
From: p.wallstedt at gmail.com (p.wallstedt at gmail.com)
Date: Thu, 15 May 2008 08:03:40 -0700 (PDT)
Subject: pyserial and file open conflict?
Message-ID: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>

Hi all!

I have a small but rather annoying problem with pyserial. I want to
open a file on disk for reading and then open a com-port, write lines
from the file to the port and then read something back and compare it
to the next line in the file. Should be simple. And it is, apart from
the fact that the file seems to be doubled ...? Or it loops through
the file twice.

If I exclude the "import serial" it works.

Any ideas?

thanks
Peter


From duncan.booth at invalid.invalid  Thu May  8 03:56:12 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 07:56:12 GMT
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
Message-ID: <Xns9A985A46AEA62duncanbooth@127.0.0.1>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> 
> 
> George Sakkis wrote:
>> One of the few Python constructs that feels less elegant than
>> necessary to me is the del statement. For one thing, it is overloaded
>> to mean three different things:
>> (1) del x: Remove x from the current namespace
>> (2) del x[i]: Equivalent to x.__delitem__(i)
>> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
> 
> Note that the 'X = Y' construct has the corresponding three meanings:
> 
> (1) x = 4 # Bind x to 4 in the 'current namespace'
> (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)

I think you both missed a case:

  (1b) global x; del x    # Remove x from global namespace
  (1b) global x; x = 4    # Bind x to 4 in the global namespace

> What conclusion should we draw from that?

That Python is simple and consistent.


From malaclypse2 at gmail.com  Mon May 12 16:33:05 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Mon, 12 May 2008 16:33:05 -0400
Subject: thread stomp?
In-Reply-To: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
References: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
Message-ID: <16651e80805121333y3e132ef0h6badc3ad492f55f@mail.gmail.com>

On Mon, May 12, 2008 at 4:00 PM, pyn3wb <pyn3wb at pyn3wb.com> wrote:
>  class main

Why are you making main a class?  It should almost certainly be a
function (defined with "def", not "class").

>         for i in dircache.listdir(dir):
>                 //run over files
>                 class1(dir).start()

You've started a bunch of threads.  If you want to wait for them to
all finish, you need to call .join() on them all.  You can't do that
unless you save references to your threads, like this:

threads = []
for i in dircache.listdir(dir):
    new_thread = class1(dir)
    new_thread.start()
    threads.append(new_thread)

for thread in threads:
    thread.join()

Beyond that, the code you've posted is not correct.  You've left off a
required ":"  in your definition of class main, and your comments are
not valid python comments.  Your for loops don't make a whole lot of
sense to me either.  Are they supposed to be iterating across files in
a directory?  If so, why do you start up all of your threads with
"dir" instead of "i" or "j" as the parameter to your new thread?

-- 
Jerry


From fuzzyman at gmail.com  Sat May 24 09:24:27 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 06:24:27 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>

On May 23, 10:36 am, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?
>
> *** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
> --- unittest.py 2008-05-23 11:19:57.000000000 +0200
> ***************
> *** 570,575 ****
> --- 570,577 ----
>           """
>           def isTestMethod(attrname, testCaseClass=testCaseClass, prefix=self.testMethodPrefix):
>               return attrname.startswith(prefix) and callable(getattr(testCaseClass, attrname))
> +         def getlinenr(name):
> +             return getattr(testCaseClass, name).im_func.func_code.co_firstlineno
>           testFnNames = filter(isTestMethod, dir(testCaseClass))
>           for baseclass in testCaseClass.__bases__:
>               for testFnName in self.getTestCaseNames(baseclass):
> ***************
> *** 577,582 ****
> --- 579,586 ----
>                       testFnNames.append(testFnName)
>           if self.sortTestMethodsUsing:
>               testFnNames.sort(self.sortTestMethodsUsing)
> +         else:
> +             testFnNames.sort(key=getlinenr)
>           return testFnNames


I second Roy's appreciation with you going to the trouble to post a
patch. There is another problem with your code though, it is dependent
on the CPython implementation. Currently unittest works *great* with
IronPython, which your code wouldn't.

Also, like others, I have had wonderful experiences of trying to track
down test failures that depend on the order that tests run in. Having
interdependencies between tests is a recipe for madness...

Michael Foord
http://www.ironpythoninaction.com/


From cokofreedom at gmail.com  Wed May 21 10:28:17 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 07:28:17 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
Message-ID: <4540a28e-59b4-4903-8c93-6239eb257c1f@j22g2000hsf.googlegroups.com>

On May 21, 4:09 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> cokofree... at gmail.com wrote:
>
> >> And wastes time. regular expressions can become expensive to match -
> >> doing it twice might be hurtful.
>
> >> Diez
>
> > match = (my_re1.match(line) or my_re2.match(line)) or
> > my_re3.match(line)
>
> How do you know *which* of the three has matched then?
>
> Diez

Depends if the OP wants to know that...


From duncan.booth at invalid.invalid  Wed May 28 09:52:34 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 28 May 2008 13:52:34 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
Message-ID: <Xns9AAC974ABFB89duncanbooth@127.0.0.1>

Dave Parker <daveparker at flamingthunder.com> wrote:

> Catch also gives you a
> single, uniform, syntactically unambiguous way to embed statements (or
> whole statement lists) into expressions -- without causing the
> syntactic problems of = statements in if statements or the obfuscation
> of question mark notation, etc.  For example:
> 
> If catch(set x to y+z.) < 0.1 then go to tinyanswer.
> 
So what does this do exactly if the set throws an error? Is the error 
message printed at the top level going to be telling you about the failed 
addition or the failed comparison? Why do you need the catch anyway, if a 
statement is just an expression why can't you just put the statement into 
parentheses?

For that matter, is there any way to distinguish between different errors 
and only catch particular ones? A bare except clause in Python is usually a 
signal of bad code: when handling errors you only want the errors you have 
anticipated, and want to be sure that any unexpected errors don't get 
caught.

You have a great opportunity to avoid making some of the same mistakes that 
Python is trying to get out of. For example as of Python 2.5 
KeyboardInterrupt and SystemExit to longer inherit from Exception. That 
means a bare except in Python no longer catches either of those: if you 
want to handle either of these exceptions you have to be explicit about it.


-- 
Duncan Booth http://kupuguy.blogspot.com


From tavares at fe.up.pt  Thu May  1 11:49:28 2008
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: Thu, 1 May 2008 08:49:28 -0700 (PDT)
Subject: =?windows-1252?Q?Symposium_=93Image_Processing_and_Analysis=94_within?=
	=?windows-1252?Q?_the_ICCES=2709_Thailand_=2D_Announce_=26_Call_for_Papers?=
Message-ID: <0d0443f2-0881-4063-a983-04d72223a589@56g2000hsm.googlegroups.com>

(Our apologies for cross-posting.
We appreciate if you kindly distribute this information by your co-
workers and colleagues.)

**********************************************************************************************************************

Symposium ?Image Processing and Analysis?
International Conference on Computational & Experimental Engineering
and Sciences 2009 (ICCES'09)
Phuket, Thailand, 8-13 April 2009
http://icces.org/cgi-bin/ices09/pages/index

**********************************************************************************************************************

Dear Colleague,

Within the International Conference on Computational & Experimental
Engineering and Sciences 2009 (ICCES'09), to be held in Phuket,
Thailand, in 8-13 April 2009, we are organizing the Symposium ?Image
Processing and Analysis?.
Examples of some topics that will be considered in that symposium are:
Image restoring, Description, Compression, Segmentation and
Description; Objects tracking, Matching, Reconstruction and
Registration; Visualization Enhance; Simulation and Animation;
Software Development for Image Processing and Analysis; Grid Computing
in Image Processing and Analysis; Applications of Image Processing and
Analysis.

Due to your research activities in those fields, we would like to
invite you to submit your work and participate in the Symposium ?Image
Processing and Analysis?.

For instructions and submission, please access to the conference
website at: http://icces.org/cgi-bin/ices09/pages/index.
Please note, when submitting your work you should choose the Symposium
?Image Processing and Analysis?.

Important dates and Instructions:

- 15 Oct 2008: Start abstract submission;
- 1 Jan 2009: Deadline for abstract submission;
- 10 Jan 2009: End of abstract selection.
If you intend to submit your work please notify as soon as possible
the main organizer of your intention (tavares at fe.up.pt);
Instructions for authors are available at: http://icces.org/cgi-bin/ices09/pages/guide.


With kind regards,
Yours sincerely,

The Organizers,

Jo?o Manuel R. S. Tavares (tavares at fe.up.pt) (main organizer)
Faculty of Engineering of University of Porto, Porto, Portugal
Yongjie (Jessica) Zhan (jessicaz at andrew.cmu.edu)
Department of Mechanical Engineering, Carnegie Mellon University,
Pittsburgh, USA
Maria Jo?o M. Vasconcelos (maria.vasconcelos at fe.up.pt)
Faculty of Engineering of University of Porto, Porto, Portugal


From nagle at animats.com  Thu May 22 16:07:58 2008
From: nagle at animats.com (John Nagle)
Date: Thu, 22 May 2008 13:07:58 -0700
Subject: Using MySQLdb to select into the local file
In-Reply-To: <g14gk0$ntt$1@registered.motzarella.org>
References: <g14gk0$ntt$1@registered.motzarella.org>
Message-ID: <4835cf41$0$34536$742ec2ed@news.sonic.net>

Nikhil wrote:
> I am using the MySQLdb python module. I have a table named 'testing' 
> with few columns, under the 'test' database, what is hosted on a remote 
> mysql server.
> 
> I want to run the following query to get a comma-separated information 
> from the table
> 
> 
> LOCK TABLES foo READ;
> SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
>   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
>   LINES TERMINATED BY '\n'
>   FROM 'testing'
> UNLOCK TABLES;
> 
> ..the query is running fine, but what I am noticing is /tmp/result.txt 
> is getting created locally on a mysqld running machine but not on the 
> client(python program) using the MySQLdb module.

     Unfortunately, while there is LOAD DATA LOCAL INFILE, which
reads a file on the client, there is no SELECT INTO LOCAL OUTFILE.

     Actually, you probably want to turn off the FILE privilege
for your MySQL.  That blocks LOAD DATA INFILE and SELECT INTO
OUTFILE, generally considered a good idea because those commands can
access arbitrary file names.

     Also, if you're still using LOCK TABLES and UNLOCK TABLES,
read up on InnoDB and transactions.

     Typically, you do something like this:

import MySQLdb
import csv

def writedb(db, filename) :
	try :
		outcsv = csv.writer(filename)	# output object for CSV
		cursor = db.cursor()									cursor.execute("SELECT a,b,a+b FROM testing")	
		while True :			# do all rows
			row = cursor.fetchone()	# get a tuple for one row
			if row is None :	# if end of rows
				break		# done
			outcsv.writerow(row)	# write row in CSV format
		db.commit()			# release locks

	except MySQLdb.OperationalError, message:
		print "Database trouble: ", message # handle any db problems
		raise				# reraise exception


hostname="???"					# fill in appropriately
user="???"
password="???"
db = MySQLdb.connect(host=hostname, 		# open database
	user=username, passwd=password, db=databasename)

writedb(db, '/tmp/result.txt')			# do it

===============

   Note that this is ASCII-oriented; if you Unicode, you need
extra params to "connect".  Also, the CSV module doesn't do
Unicode well as yet.  Make sure the "outcsv" object
goes out of scope before you try to read the file, so the
file gets flushed and closed.

					John Nagle


From alex.m.gusarov at gmail.com  Mon May 26 02:21:16 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 13:21:16 +0700
Subject: PYQT- How to prevent a dialog being resized in qtdesigner
In-Reply-To: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>
References: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>
Message-ID: <ac6dcb3d0805252321r20bbd2aeif108a9a0fad16c41@mail.gmail.com>

There is no simple way to do it. But it seems to be a meaningless - resizing
dialog in Designer is equal to changing its geometry.


On Mon, May 26, 2008 at 9:30 AM, bbmerong <dmkim at mktec.co.kr> wrote:

> I have a question about qtdesigner.
>
> I'd like to know how to prevent a dialog being resized in qtdesigner.
>
> I'll wait for your answer.
>
> Then, Thank you in advance.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From jeffober at gmail.com  Fri May  2 15:47:15 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:47:15 -0700 (PDT)
Subject: Python and SOAP status
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com> 
	<L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>

Twisted has SOAP support.


From bockman at virgilio.it  Mon May 12 03:55:25 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Mon, 12 May 2008 00:55:25 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
Message-ID: <e6c623cf-73b7-4ebc-bd68-43f778fac53d@b64g2000hsa.googlegroups.com>

On 12 Mag, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se> escribi?:
>
>
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
> The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.
>
> (We used this question last year - some people gave a sensible answer in less than 5 minutes, but others did not even know how to start)
>
> --
> Gabriel Genellina- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

As a test, I would leave out the last sentence, and see how many
people (and how fast) figure out than a number can be multiple of
three _and_ five and that the requirement is somehow incomplete ...

Ciao
-----
FB


From john106henry at hotmail.com  Tue May 13 20:22:59 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 17:22:59 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<mailman.1074.1210711800.12834.python-list@python.org>
	<7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
	<mailman.1086.1210718554.12834.python-list@python.org>
Message-ID: <ef03b353-00f1-4cd6-acaf-9a8639aa1c3b@z16g2000prn.googlegroups.com>

On May 13, 3:42 pm, Gary Herron <gher... at islandtraining.com> wrote:
> John Henry wrote:
> > On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
>
> >> John Henry wrote:
>
> >>> Hi list,
>
> >>> I can't understand this.  The following import statement works fine:
>
> >>>     from PythonCard.templates.dialogs import runOptionsDialog
>
> >>> but this one fails:
>
> >>>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> >> This kind of "dotted" name import only works for packages, and a
> >> directory is considered a package only if it contains a file name
> >> __init__.py.    Looking around my installation of PythonCard (on Linux)
> >> I see that most of those directories *do NOT* have a __init__.py, so
> >> they are not packages and cannot be imported that way.
>
> >> Of course this leaves unanswered the question of *how* you are supposed
> >> to import that code.   I've never used PythonCard so I can't help
> >> further, but I suggest looking at the documentation and examples
> >> supplied.  And perhaps waiting for someone with experience with
> >> PythonCard to answer.
>
> >> Gary Herron
>
> >> P.S. It is usually a waste of time to tell us that something fails
> >> without telling us *how* it fails.  (Cut and paste the error message
> >> always, and the traceback usually.)  If you don't, you will usually get
> >> a request to supply that information, and then have wast3ed the time for
> >> one full round of message to the group.  Even in this case, I'm only
> >> guessing how it failed for you.
>
> >>> I've checked and rechecked to make sure that the spellings are proper
> >>> and that the tools, the codeEditor directory, and codeEditor.py, and
> >>> the class CodeEditor all exists and yet idle keep complaining that it
> >>> can't import from PythonCard.tools.
>
> >>> What's going on?  (Running Python2.5 under WinXP).
>
> >>> Regards,
> >>> --
> >>>http://mail.python.org/mailman/listinfo/python-list
>
> > Thank you very much.  I didn't know about the __init__.py
> > requirement.  Appreciate it.
>
> Actually I should have added that there ways to import such things, and
> PythonCard must be using some such method itself.  You can manipulate
> the sys.path variable, or directly call the import mechanism using the
> builtin __import__, or use a suppled "imp" module.    However, you
> should not have to do any such thing to use PythonCard.  It should do
> them in for you.

I tried to call __import__ directly and didn't work neither.

What I was doing is to invoke their codeEditor directly into my
application.  Their codeEditor was designed to be a stand alone
application and that's why it didn't include the file you cited.

I never quite understood what they were saying about __init__.py but
now I understand.  Learn something new every day.

Thanks again.


From collinyeung at shaw.ca  Tue May 20 21:05:41 2008
From: collinyeung at shaw.ca (Collin)
Date: Wed, 21 May 2008 01:05:41 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <FzKYj.152636$rd2.107869@pd7urf3no>

Dave Parker wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

Personally, FT is a bit meh to me. The way you issue your statements I 
always think something is wrong, mainly because when I want to define, 
say, x, in python I'd go:

x = "whatever"

Instantly noting that I defined x. While in Flaming Thunder I'd have to 
type:

Set x to "whatever"

It just feels wrong.


From Magnus.Moraberg at gmail.com  Tue May 27 08:06:53 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 05:06:53 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
	<6a27idF32hqrpU3@mid.uni-berlin.de>
Message-ID: <c0c3ec00-1cbe-40bd-ae92-6fff2d7ae619@34g2000hsf.googlegroups.com>

On 27 Maj, 12:54, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 27 May 2008 03:01:30 -0700, Magnus.Moraberg wrote:
> > I wish to extract all the words on a set of webpages and store them in
> > a large dictionary. I then wish to procuce a list with the most common
> > words for the language under consideration. So, my code below reads
> > the page -
>
> >http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
>
> > a welsh language page. I hope to then establish the 1000 most commonly
> > used words in Welsh. The problem I'm having is that
> > soup.findAll(text=True) is returning the likes of -
>
> > u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
> >www.w3.org/TR/REC-html40/loose.dtd"'
>
> Just extract the text from the body of the document.
>
> body_texts = soup.body(text=True)
>
> > and -
>
> > <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
>
> > Any suggestions how I might overcome this problem?
>
> Ask the BBC to produce HTML that's less buggy.  ;-)
>
> http://validator.w3.org/reports bugs like "'body' tag not allowed here"
> or closing tags without opening ones and so on.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Great, thanks!


From martin at v.loewis.de  Fri May 30 17:33:48 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 30 May 2008 23:33:48 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <g1pgrg$nff$00$1@news.t-online.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<4840407c$0$4845$9b622d9e@news.freenet.de>
	<g1pgrg$nff$00$1@news.t-online.com>
Message-ID: <484072bc$0$27773$9b622d9e@news.freenet.de>

> The function first normalizes the "@" away and then looks for it. Is that
> the expected behaviour?

I believe this functionality is broken by design. Python can't possibly
know correctly what each locale name on each system means, and what
encoding is used in the locale.

Instead, the system's API to find out the encoding should be used,
as exposed in locale.getpreferredencoding().

Regards,
Martin


From grante at visi.com  Tue May 13 13:42:06 2008
From: grante at visi.com (Grant Edwards)
Date: Tue, 13 May 2008 12:42:06 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <SYWdnYoHYaFzT7TVnZ2dnUVZ_sHinZ2d@posted.visi>

On 2008-05-13, Dave Parker <daveparker at flamingthunder.com> wrote:

> And I'll be willing to bet that Flaming Thunder will have OO
> features similar to Python before Python has the features that
> Flaming Thunder already does.

Well, python will definitely never have a name that sounds like
a slang term for happens after you get food poisioning at a
Thai restaurant...

;)

-- 
Grant Edwards                   grante             Yow! Edwin Meese made me
                                  at               wear CORDOVANS!!
                               visi.com            


From pavlovevidence at gmail.com  Mon May 19 22:40:55 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 19 May 2008 19:40:55 -0700 (PDT)
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <51dbdc85-b69c-477a-807d-58791870b525@l42g2000hsc.googlegroups.com>

On May 19, 8:47 pm, James A. Donald <jam... at echeque.com> wrote:
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.

This factor is scale-neutral.  You can expect the number of such bugs
to be proportional to the lines of code.

It might not scale up well if you engage in poor programming practives
(for example, importing lots of unqualified globals with tiny,
undescriptive names directly into every module's namespace), but if
you do that you have worse problems than accidental name collisions.


> I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

Unlike most C++/Java/VB/Whatever programs which finish and ship, and
are never patched or improved or worked on ever again?


> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded,

No it isn't.

It has some limitations in threading, but many programs make good use
of threads nonetheless.  In fact for something like a web app Python's
threading limitations are relatively unimportant, since they tend to
be I/O-bound under heavy load.

[snip rest]


Carl Banks


From gagsl-py2 at yahoo.com.ar  Mon May 12 00:39:14 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 01:39:14 -0300
Subject: Free Memory
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
	<op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<c3f69bf60805102106n524cc6b9qc6c1f5fba0c8ee63@mail.gmail.com>
Message-ID: <op.ua0xvok1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 01:06:13 -0300, Patrick Mullen <saluk64007 at gmail.com> escribi?:

> Yeah I don't know much about locals or globals.  I've never used them
> before, just know they are there.  But anyway, to illustrate what I meant by
> the interesting behavior, here is the output (and sorry for it being so
> long):
>
> IDLE 2.6a2
>>>> globals()
> {'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__',
> '__doc__': None, '__package__': None}
>>>> globals().clear()
>>>> globals()
> {'__builtins__': {'bytearray': <type 'bytearray'>, 'IndexError': <type
     [... long __builtins__ dictionary contents ...]
> 'exceptions.WindowsError'>}}
>>>>
>
> The OP wanted to clear the interpreter and I took a very broad (and highly
> unresearched) stab at it, and saw some behavior that I wasn't expecting.
> So before, all the builtin variables are hidden away in __builtins__, but
> after clearing globals, they are filled into globals.  This doesn't really
> make sense to me, but I don't know much about __builtins__ or globals.

Look more carefully:

py> globals().clear()
py> len(globals())
1
py> globals().keys()
['__builtins__']

globals() contains now a single entry, the namespace of the __builtin__ module (that is, __builtin__.__dict__), not the individual builtin entries (these are the dictionary entries that you posted).
As you later noticed, this happens only on IDLE. I don't know why IDLE behaves that way, but avoid entering "restricted mode" may be a reason (see http://docs.python.org/lib/restricted.html )
Usually, __builtins__ contains a reference to the __builtin__ module itself *only* in __main__; in all other modules, __builtins__ contains a reference to the __builtin__ namespace (like what you got in IDLE after clearing globals). I don't know *why* they are different either.

-- 
Gabriel Genellina



From mccredie at gmail.com  Fri May 23 17:10:51 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 23 May 2008 14:10:51 -0700 (PDT)
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
Message-ID: <8e4fc264-c19d-4bca-9984-757c0012ce8f@j22g2000hsf.googlegroups.com>

On May 23, 11:59 am, tinn... at isbd.co.uk wrote:
> I'm desperately trying to move a Microsoft Access database application
> (a simple accounts system I wrote myself) to Linux.  Python is one of
> my preferred programming laguages so I wonder if there are any good
> Python 'frameworks' for writing database applications, in particular I
> need good reporting and forms writing facilities.  The basic database
> and logic/arithmetic seem fairly simple to me.
>
> --
> Chris Green

You might look at web frameworks like django or turbo gears. The
tutorials for django jump right into database access, and the default
administrative stuff is robust and pretty simple.

Matt


From bj_666 at gmx.net  Thu May 22 03:07:13 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 May 2008 07:07:13 GMT
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>
	<4834C05D.6020608@gmail.com>
	<0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>
Message-ID: <69kkd1F33ahahU1@mid.uni-berlin.de>

On Wed, 21 May 2008 17:56:38 -0700, bukzor wrote:

> On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
>
>> if os.path.exists('file'):
>>         open('file', 'w').close()
>>
>> Right?
> 
> You only want to blank it if it exists? If it doesn't exist you won't
> create it.
> The .close() is superlative: since you don't keep the value, it gets
> deallocated and closed by the destructor.

The language neither guarantees *when* an object will be deallocated nor
that its destructor is called *at all*.  It's cleaner to explicitly close
the file.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Tue May 27 10:43:51 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 07:43:51 -0700 (PDT)
Subject: Creating a web page with Python
References: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>
Message-ID: <e8e4e940-dc6f-4396-be84-561f1a7e87dd@2g2000hsn.googlegroups.com>

On May 27, 9:25?am, subhabrata.i... at hotmail.com wrote:
> Dear Members of the group,
> If any one can help me with an idea how to create a web page with
> python? Do I have to use vbscript or something like that? I also want
> to embed the function in the button of a form. How can I do it in
> Python?
> Regards,
> Subhabrata Banerjee.


There are many ways to do this. You can use Python kind of like cgi:

http://www.python.org/doc/essays/ppt/sd99east/index.htm
http://docs.python.org/lib/module-cgi.html

WSGI: http://www.wsgi.org/wsgi

Web Frameworks: Django, TurboGears, Pylons, mod-python, Zope/Plone

Or you might just want to browse Python's wiki:

http://wiki.python.org/moin/WebProgramming

Mike



From castironpi at gmail.com  Tue May 13 01:52:47 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 22:52:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
Message-ID: <ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>

On May 12, 8:36?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 7:20?pm, castiro... at gmail.com wrote:
>
> >?Yes, I am trying to visualize something.
>
> If it is related to making furniture comfortable for humans, have you
> considered painting the furniture with thermochromic paint (http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> response to temperature, which in part is determined by how hard a
> body is pressed against it because close contact tends to trap heat.
> An evenly distributed color might indicated evenly distributed
> pressure.

I do hold an argument that one can make too much money for one's own
good quality of life.  Am I trying to visualize thermal (and ergo
possibly chemical too) gradients (thermovoltaic)?  Yes in part.  I'm
pretty generally interested, but where can print layout take you?
Microsales?


From george.sakkis at gmail.com  Thu May  8 01:07:38 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 22:07:38 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <c5c6cea7-4769-467a-968e-71232809b388@x35g2000hsb.googlegroups.com>

On May 7, 11:34?pm, Yves Dorfsman <y... at zioup.com> wrote:

> So would it be a worthy addition to python, to add it right in the core of
> the language, and hopefully in an efficient manner ?

Given that it's a straightforward generalization of the existing
slicing syntax, it sure does make sense from a theoretical standpoint.
Whether it's a worthy addition is debatable though; I don't think
there are many common use cases to convince the core developers to
work on it. OTOH if you (or someone else) comes up with a working
patch, it might improve its chances of getting accepted.

George


From jcd at sdf.lonestar.org  Thu May  8 09:50:03 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 09:50:03 -0400
Subject: listen on TCP port
In-Reply-To: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>
References: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>
Message-ID: <1210254603.8236.6.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 05:56 -0700, petr.poupa at gmail.com wrote:
> Hello,
> is it possibble listening on TCP port by python and how? I am trying
> chilkat but poorly :(.
> 
> Thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

You just asked this exact same question yesterday, and got a few
responses, none of which are addressed in the post above.  Do neither
twisted nor the socket module work for you?

 





From efurman at admailinc.com  Wed May 21 14:42:00 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 21 May 2008 10:42:00 -0800
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <48346CF8.8070109@admailinc.com>

John Machin wrote:

> Robert Kern wrote:
>
>> Ethan Furman wrote:
>>
>>> Greetings,
>>>
>>> I'm looking at the struct module for binary packing of ints and 
>>> floats.  The documentation refers to C datatypes.  It's been many 
>>> years since I looked at C, but I seem to remember that the data type 
>>> sizes were not fixed -- for example, an int might be two byes on one 
>>> machine, and four bytes on the next.  Can any C programmers verify 
>>> this?  If it is true, does that mean that struct.pack('h', 8001) 
>>> might give me different results depending on the machine it's 
>>> running on?
>>
>>
>> Right. I believe (but could be wrong) that "char" is defined to be 
>> one byte, but that "short", "int", "long", and "long long" are 
>> defined as "at least as big as the previous type".
>>
>> In practice, though, on nearly every machine that Python runs on, 
>> "char" is one byte, "short" is two bytes, and "int" is four bytes. 
>> "longs" and "long longs" tend to vary substantially, though; never 
>> assume sizes for them.
>>
>> Single-precision floats are always four bytes and double-precision 
>> floats are always eight bytes. "long doubles" vary; they could be 
>> twelve bytes or sixteen.
>>
>> If you want to deal with fixed sizes, use struct.calcsize() to test 
>> the sizes of each of the integer types, assign them to width-specific 
>> aliases, and always use these aliases.
>>
>
> This is all true if you want to operate in "native" mode; however in 
> "standard" mode the sizes are fixed -- otherwise there'd be no easy 
> way of reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof 
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required 
> for any type (so you have to use pad bytes); short is 2 bytes; int and 
> long are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and 
> double are 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a 
> long-established PC file format, he will need to '<' for littleendian 
> order, and an appropriate selection from bBhHiI and d will do what he 
> needs.
>
> HTH,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list

John, you are correct in my purpose, and thank you (and to everyone) for 
the clarification.  It does indeed help a great deal.
--
Ethan



From gherron at islandtraining.com  Thu May 29 11:45:31 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 29 May 2008 08:45:31 -0700
Subject: Tuple of coordinates
In-Reply-To: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <483ECF9B.5090502@islandtraining.com>

victor.herasme at gmail.com wrote:
> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>      for j in (beg, end, step):
>           for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>   

Your statement of the problem makes it look like all three coordinates 
cover the same sequence of values.  Is that true? Or does i's range  
(beg, end, step) differ from j's and k's.    If they differ, are they 
all the same length?

You pseudo-code makes it look like you want all combinations, but your 
sample output does not indicate that.  Which is it, [(1,1,1), (2,2,2)] 
or [(1,1,1), (1,1,2),(1,2,1),(1,2,2), ...]?

Depending on the answers to those questions, one of the following list 
comprehensions may demonstrate how to achieve a solution.

 >>> a = range(2,6,2)
 >>> b = range(3,7,2)
 >>> c = range(10,14,2)
 >>> print a,b,c
[2, 4] [3, 5] [10, 12]
 >>> [(i,j,k) for i,j,k in zip(a,b,c)]  #  Using zip process three lists 
in lock-step
[(2, 3, 10), (4, 5, 12)]
 >>> [(i,j,k) for i in a  for j in b  for k in c]   #Nested loop give 
all possible combos.
[(2, 3, 10), (2, 3, 12), (2, 5, 10), (2, 5, 12), (4, 3, 10), (4, 3, 12), 
(4, 5, 10), (4, 5, 12)]
 >>>

Gary Herron

>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>
>
> Victor
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From lac at openend.se  Mon May 26 10:36:13 2008
From: lac at openend.se (Laura Creighton)
Date: Mon, 26 May 2008 16:36:13 +0200
Subject: looking for membership management software -- Open Source,
	written in Python
Message-ID: <200805261436.m4QEaDdI026074@theraft.openend.se>


I'm looking for an application that handles the membership of an
organisation -- who's a member, who has paid fees, addressbook and 
the odd added field.

Anybody got one they recommend?

Language does not have to be English -- we're going to have to internationalise
whatever we get in any case.  Of course, if it happens to already speak
various European languages, this will be a big plus.

Thanks in advance,
Laura Creighton


From __peter__ at web.de  Tue May 20 03:08:25 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 09:08:25 +0200
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <g0ttd9$elh$03$1@news.t-online.com>

notnorwegian at yahoo.se wrote:

>  if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:

if all(x == 5 for x in a,b,c,...):
   print "yep"


Peter


From george.sakkis at gmail.com  Thu May  1 21:13:22 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 18:13:22 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
Message-ID: <ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>

On May 1, 7:44 pm, NevilleDNZ <neville... at gmail.com> wrote:

> Below is a (flawed) one line RegEx that checks curly brackets (from
> awk/c/python input) are being matched.  Is there a one liner for doing
> this in python?

There is not even a 1000-liner regular expression for this; it's a
context-free language [1], not a regular one [2]. Either do it
manually or use a parser generator [3].

George

[1] http://en.wikipedia.org/wiki/Context-free_language
[2] http://en.wikipedia.org/wiki/Regular_language
[3] http://wiki.python.org/moin/LanguageParsing


From gagsl-py2 at yahoo.com.ar  Sun May 18 12:27:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 13:27:42 -0300
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
Message-ID: <op.ubcyogb9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 12:32:28 -0300, Terry <terry.yinzhe at gmail.com> escribi?:

> On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
>> escribi?:
>>
>> > Is there a simple way to get all the instances of one class? I mean
>> > without any additional change to the class.
>>
>> Try with gc.get_referrers()
>
> But I saw in the help that we should "Avoid using get_referrers() for
> any purpose other than debugging. "

Yes - so what do you want to do actually?

-- 
Gabriel Genellina



From martin at v.loewis.de  Tue May 20 14:48:15 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 20 May 2008 20:48:15 +0200
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
Message-ID: <48331cef$0$32633$9b622d9e@news.freenet.de>

> How do I access the sysctl(3) call from Python on BSD?
> 
> Specifically I want to retrieve:
> 
> $ sysctl -d net.inet.ip.stats
> net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)
> 
> So I'll need some way of getting to struct ipstat from Python as well

At the moment, only through ctypes - if you need to use sysctl(3),
and you'll have to manufacture the layout of struct ipstat yourself.

Regards,
Martin


From jstucklex at attglobal.net  Tue May 27 22:27:40 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 22:27:40 -0400
Subject: php vs python
In-Reply-To: <g1iem8$r5$3@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru>	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
	<g1iem8$r5$3@news.mtu.ru>
Message-ID: <nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>
>>>> Greetings, Ivan Illarionov.
>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>
>>>>>> As I've said before - good programmers can write good code in any
>>>>>> language.
>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>> and easier in another.
>>>> It's obvious lie. If you have clear mind and you know language you're
>>>> using, there are absolutely NOTHING can deny you to write clear code.
>>>> Even using forth postfix notation, I have no problem writing good
>>>> code, it's as easy as writing bad code. And yes, I do see the
>>>> difference.
>>> No. Language does matter.
>> Not for a good programmer.  Only for half-assed ones.
> 
> No. Language does matter

Only to half-assed programmers.  Good programmers can write good code in 
any language they know.

Ever seen good assembler?  It can be done - really!  Also fortran, 
cobol, forth... the list goes on.


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From kw at codebykevin.com  Sat May 10 11:42:29 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:42:29 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.902.1210433160.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
Message-ID: <4825C265.90106@codebykevin.com>

Guilherme Polo wrote:
> 2008/5/10 Zentrader <zentraders at gmail.com>:
>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>> extension for additional widgets, and TkTable and/or TableListWrapper.
>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
> 
> There is also Tile, or Ttk since Tk 8.5, if you are interested in
> extensions too.
> Apparently there are three Tile wrappers now, two are incomplete
> (sorry for saying that):
> 
> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
> of ttk styling, maybe other things and it is not only a ttk wrapper
> (there are other things besides it)
> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
> Treeview, big part of ttk styling and maybe something else.
> 
> And there is also one I'm doing, that I expect to be complete:
> 
> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
> 
> Documentation and samples are still lacking, but I'm working on them.
> And I haven't tested it under Windows, so I invite you all to test it.
> 
> Regards,
> 
I'm the maintainer of Tile.py. It may well be incomplete, as it was 
first developed by Martin Franklin a couple of years ago and I've been 
modifying it as my own needs require.

So you're doing your own implementation of ttk in Tkinter as a Google 
Summer of Code Project? Wonderful! Are you planning on submitting it for 
including in Tkinter's core, as I did? If yours proves to be the better 
implementation I'll gladly withdraw mine, as I'm not sure I have time to 
overhaul it extensively.

I'll follow your progress with interest!

--Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From bearophileHUGS at lycos.com  Sun May  4 07:00:26 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 4 May 2008 04:00:26 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org> 
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
Message-ID: <c9735621-db58-45a0-b243-1d22651e767f@24g2000hsh.googlegroups.com>

George Sakkis:
> A faster algorithm is to create a 'key' for each word, defined as the
> tuple of ord differences (modulo 26) of consecutive characters.

Very nice solution, it uses the same strategy used to find anagrams,
where keys are
"".join(sorted(word))
Such general strategy to look for a possible invariant key for the
subsets of the required solutions is quite useful.

Bye,
bearophile


From tjreedy at udel.edu  Wed May 21 19:42:28 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 19:42:28 -0400
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65><a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
Message-ID: <g12c11$6di$1@ger.gmane.org>


"Karlo Lozovina" <_karlo_ at _mosor.net_> wrote in message 
news:Xns9AA6FDC59536mosornet at 161.53.160.65...
| Andr? <andre.roberge at gmail.com> wrote in
| news:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com:
|
| > How about something like the following (untested)
| >
| > done = False
| > while not done:
| >   try:
| >      some_function()
| >      done = True
| >   except:
| >      some_function2()
| >      some_function3()
|
| Sure, that works, but I was aiming for something more elegant and 
Pythonic
| ;).

while True:
  try:
    some_function()
    break
  except Exception:
    patchup()

??? 





From timj at tolisgroup.com  Mon May  5 14:32:17 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 11:32:17 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
Message-ID: <0c647f30-3c99-4f3b-b726-4cc74f51abea@a9g2000prl.googlegroups.com>

On May 5, 11:43?am, brucoder <t... at tolisgroup.com> wrote:
> Hi Folks,
>
> Searched the archives, but I can only find mention of db.h problems relating to Linux.
>
> I've downloaded the source for 2.5.2 and am trying to compile it in Visual Studio 6 (SP6).

I've just stepped back to 2.3.7 and receive the same error when
compiling bsddb...

> ?The error reports read:
>
> --------------------Configuration: _bsddb - Win32 Debug--------------------
> Compiling...
> _bsddb.c
> C:\Documents and Settings\Tim\My Documents\Python-2.5.2\Modules\_bsddb.c(90) : fatal error C1083: Cannot open include file: 'db.h':
> No such file or directory
> Error executing cl.exe.
>
> _bsddb_d.pyd - 1 error(s), 0 warning(s)



From Magnus.Moraberg at gmail.com  Tue May 27 05:03:02 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 02:03:02 -0700 (PDT)
Subject: HTTPError sometimes when using urllib2.urlopen
Message-ID: <5978cac5-27e1-40cd-9abe-9e7536395468@d45g2000hsc.googlegroups.com>

Hi,

I have the following code -

import urllib2
from BeautifulSoup import BeautifulSoup

proxy_support = urllib2.ProxyHandler({"http":"http://
999.999.999.999:8080"})
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)

page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
membership.asp')
soup = BeautifulSoup(page)

pageText = soup.findAll(text=True)
print pageText

Sometimes when I run this code I get the exception -

HTTPError: HTTP Error 407 Proxy authentication required

I seem to get this error repeatidly for a while, then I go a surf for
a moment and when I run the code again the exception might have gone
away. No idea why...

I have no problems with firefox which uses the same proxy. The proxy
requires no authentication...

What might the issue be?

Thanks,

Barry.




From bignose+hates-spam at benfinney.id.au  Mon May 12 02:24:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 16:24:23 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru>
Message-ID: <87iqxk6nvs.fsf@benfinney.id.au>

Ivan Illarionov <ivan.illarionov at gmail.com> writes:

> >> In such cases, the name 'dummy' is conventionally bound to the items
> >> from the iterator, for clarity of purpose
> [..]
> > If a value isn't used, then I think the most clear name for it is
> > "unused".
> [...]
> 
> Maybe my brain works differently, but I find both "dummy" and
> "unused" are extremely confusing names for loop counters. The loop
> begins to look like it doesn't iterate at all if its counter is
> dummy or unused.
> 
> If it *counts* it is *used* and it's *not* dummy.

The value is unused by any of the code inside the block. For the
purposes of that block, it is a dummy value.

That something *else* (the iterator driving the 'for') is taking care
of knowing when the loop is finished is great. However, in the code
the programmer is writing, the loop counter is entirely unused.

> Why reinvent the wheel when "a common identifier naming convention
> is for the loop counter to use the variable names i, j and k (and so
> on if needed)" (from Wikipedia
> http://en.wikipedia.org/wiki/Loop_counter )

That is also regrettably common in Python code. It still suffers from
being unnecessarily ambiguous, since there are *also* plenty of loops
using 'i', 'j', etc. where the loop counter *is* used.

Differentiating these use cases by appropriate naming is, IMO, worth
the effort of choosing a meaningful name.

-- 
 \              "Ignorance more frequently begets confidence than does |
  `\           knowledge." ?Charles Darwin, _The Descent of Man_, 1871 |
_o__)                                                                  |
Ben Finney


From mensanator at aol.com  Tue May 13 18:31:03 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 13 May 2008 15:31:03 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk> 
	<482a00a2@news.mel.dft.com.au>
Message-ID: <249560b3-7dd8-4fc1-8c14-11bc98a105ca@c65g2000hsa.googlegroups.com>

On May 13, 3:57?pm, John Machin <sjmac... at lexicon.net> wrote:
> Matthew Woodcraft wrote:
> > Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> >> I would like to write a similar problem without this non-programming ?
> >> distracting issues (that is, a problem simple enough to be answered in a ?
> >> few minutes, that requires only programming skills to be solved, and ?
> >> leaving out any domain-specific knowledge).
>
> > Another reason not to like the FizzBuzz example is that it's quite
> > closely balanced between two reasonable approaches (whether to just
> > special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
> > add the Fizz and the Buzz together in that case). The interviewee might
> > reasonably guess that this distinction is what's being tested, and get
> > unnecessarily stressed about it.
>
> For such a trivial problem, fifteen minutes is more than enough to
> present alternative answers. Perhaps the intention is to weed out those
> who do become unnecessarily stressed in such circumstances. Employers
> like to play tricks to see how interviewees respond e.g. hand over two
> pages of a listing of code in language X, announce that there are 10
> syntax errors, and ask the interviewee to find and circle all the syntax
> errors. Correct answer: 11 circles.

They get away with that?

The one time I was asked to compose a (hardware) test was
because some interviewee threated to sue claiming
discrimination. So I was asked to make an absolutely
trick-free test.

Such as what's the voltage at point A?

    +5v
     |
    220 ohm
     |
     +-- A
     |
    330 ohm
     |
   ground

Would you be surprised at how many applicants couldn't
figure that out because they forgot to bring their
calculator?

Sure, I had a page from a schematic, but only to ask
how one of the shown T-flip-flops worked.

One female interviewee took one glance at the schematic
and said, "Oh, it's a parity generator."

She got hired.

I'm surprised anyone has to resort to tricks.


From larry.bates at websafe.com`  Fri May  9 18:08:22 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 09 May 2008 17:08:22 -0500
Subject: Property in derived class
In-Reply-To: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <VOedncwfMpp5V7nVnZ2dnUVZ_oqhnZ2d@comcast.com>

Joseph Turian wrote:
> If I have a property in a derived class, it is difficult to override
> the get and set functions: the property's function object had early
> binding, whereas the overriden method was bound late.
> This was previously discussed:
>    http://groups.google.com/group/comp.lang.python/browse_thread/thread/e13a1bd46b858dc8/9d32049aad12e1c1?lnk=gst#9d32049aad12e1c1
> 
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?
> 
> Thanks,
>   Joseph

Sounds a little like you are trying to write Java in Python.

1) You don't need get/set functions to get/set properties in Python.  You just
get the property directly using dotted notation.

2) Properties defined in base class exist in derived class unless you override them.


class foobase(object):
   def __init__(self):
     self.myProperty = 1

class foo(foobase):
   self.__init__(self, myProperty=None)
     foobase.__init__(self)
     if myProperty is not None:
       self.myProperty = myProperty


obj = foo()
print obj.myProperty
 >>> 1

obj = foo(6)
print obj.myProperty
 >>> 6

obj.myProperty = 19
print obj.myProperty
 >>> 10

I hope this was what you were looking for.  If not, I don't understand the question.

-Larry


From nagle at animats.com  Wed May 28 00:19:06 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 27 May 2008 21:19:06 -0700
Subject: maximum recursion depth?
In-Reply-To: <4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>
Message-ID: <483cd9e2$0$34570$742ec2ed@news.sonic.net>

alex23 wrote:
> On May 28, 9:26 am, globalrev <skanem... at yahoo.se> wrote:
>> is there a definitie limit to the nbr of calls or is the memory that
>> runs out? is that then the RAMmemory? is there a special amount of
>> memory assigned for python or it just takes and takes until windows
>> runs out of it?
> 
> You can alter the recursion limit using sys.setrecursionlimit:
> 
>     setrecursionlimit(n)
> 
>     Set the maximum depth of the Python interpreter stack to n.  This
>     limit prevents infinite recursion from causing an overflow of the
> C
>     stack and crashing Python.  

    The default is rather low.  I've actually hit it parsing big HTML
files with BeautifulSoup.

					John Nagle


From arnodel at googlemail.com  Tue May 27 16:34:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 21:34:53 +0100
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
Message-ID: <m2wslf4haq.fsf@googlemail.com>

"Joel Koltner" <zapwireDASHgroups at yahoo.com> writes:

> I have a generic (do nothing) exception class that's coded like this:
>
> class MyError(exceptions.Exception):
>     def __init__(self,args=None):
>         self.args = args
>
> When I attempt to raise this exception via 'raise MyError' I get an
> exception within the MyError constructor __init__ as follows:
>
> Traceback (most recent call last):
> [lines deleted]
>   File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
> MyStuff.py", line 7, in __init__
>     self.args = args
> TypeError: 'NoneType' object is not iterable

That's because the class 'Exception' defines a descriptor 'args' which
has to be a sequence.  Just call 'args' something else, and it will
work.  E.g.

>>> class MyError(Exception):
...     def __init__(self, args=None):
...         self.myargs = args
... 
>>> MyError()
MyError()


OTOH you could just take advantage of Exception.args:

>>> class MyError(Exception): pass
... 
>>> MyError()
MyError()
>>> MyError(1, 2, 3)
MyError(1, 2, 3)

(Details in the documentation are a bit scant, but see
http://docs.python.org/lib/module-exceptions.html)

HTH

-- 
Arnaud


From upton at virginia.edu  Fri May 30 11:01:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 30 May 2008 11:01:19 -0400
Subject: definition of a highlevel language?
In-Reply-To: <80531$483b266d$3799@news.teranews.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
	<mailman.1626.1211831386.12834.python-list@python.org>
	<80531$483b266d$3799@news.teranews.com>
Message-ID: <5504f9ac0805300801w5deb472dy3aed455e3f4747ef@mail.gmail.com>

On Mon, May 26, 2008 at 5:06 PM, Paul Miller <none at this.time> wrote:
> On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:
>
>> On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:
>
>> I don't know if it would necessarily look like the CPython VM, except
>> for the decode stage (this being said without any knowledge of the
>> CPython implementation, but with more than I ever thought I'd know about
>> processor architecture/microarchitecture)
>
> Out of curiosity, do you know how easy it would be to make a Python chip
> using FPGAs?  I have little to no hardware knowledge, but it sounds like
> a fun project in any case.  Even if it's not likely to have blazing
> performance, it'd be cool to load Python bytecode directly into
> memory. :-)
>

I don't really know, but I would guess that it's hard, or at least
time-consuming.  The best example I can give you is "JOP: A Java
Optimized Processor" which was basically an FPGA-based chip that
executed Java bytecode natively.  If you're curious, you can read
about it at http://www.jopdesign.com/ .  It looks like it was done as
a PhD thesis at the Vienna University of Technology, and unless
Austria has significantly lower PhD requirements... ;)


From mensanator at aol.com  Fri May 30 21:02:56 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 18:02:56 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com> 
	<mailman.1786.1212191104.12834.python-list@python.org>
	<30b8b4ff-f0e5-4178-b9f7-513a5e404982@z72g2000hsb.googlegroups.com>
Message-ID: <8ce037a7-b09c-40c2-a59c-2dff3d1a9126@34g2000hsh.googlegroups.com>

On May 30, 7:59?pm, Mensanator <mensana... at aol.com> wrote:
> On May 30, 6:44?pm, Joshua Kugler <jkug... at bigfoot.com> wrote:
>
>
>
>
>
> > Skonieczny, Chris wrote:
> > > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> > >http://mail.python.org/pipermail/python-list/2007-February/427841.html
>
> > > It is not true - eg. try :
> > > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > > b=int(a)
> > > and what you will get ? An error !!!
>
> > > Or probably you yourself should - quote :
> > > "You probably should go through the tutorial ASAP that is located here:
>
> > >http://docs.python.org/tut/"
>
> > int() converts a strings that is a valid intenter. ?What you're looking for
> > is ord().
>
> Possibly. Perhaps the OP wants the position of 'P'
> in the alphabet, in which case he wants b=64-ord(a)
> or b=16.

Oops! I meant ord(a)-64, of course.

>
>
>
>
>
> > In [1]: ord('d')
> > Out[1]: 100
>
> > In [2]: a='P'
>
> > In [3]: b=ord(a)
>
> > In [4]: b
> > Out[4]: 80
>
> > j


From schickb at gmail.com  Mon May 12 23:37:27 2008
From: schickb at gmail.com (schickb)
Date: Mon, 12 May 2008 20:37:27 -0700 (PDT)
Subject: Popen pipe hang
References: <mailman.1012.1210646124.12834.python-list@python.org>
Message-ID: <94c20ca2-57d9-4994-b3db-11ac4bdaeb8d@d19g2000prm.googlegroups.com>

On May 12, 7:35 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >from subprocess import Popen, PIPE
> >from array import array
>
> >arr = array('B')
> >arr.fromstring("hello\n")
>
> >src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
> >dst = Popen( ["cat"], stdin=src.stdout)
> >arr.tofile(src.stdin)
> >src.stdin.close()
> >dst.wait()
>
> Alas, you haven't actually closed src's standard input.  Though you did
> close src.stdin, you didn't close the copy of it which was inherited by
> dst!  So though the file descriptor is no longer open in your main process,
> it remains open due to the reference dst has to it.  You can fix this by
> having Popen close all file descriptors except 0, 1, and 2 before it execs
> cat - pass close_fds=True to the 2nd Popen call and you should get the
> behavior you want.
>

Thanks, that did the trick. Although I assume that by passing
close_fds=True the second Popen is actually closing src.stdout (rather
than src.stdin as mentioned)? With close_fds=True, is Python buffering
the data even though bufsize=0 is the default? Otherwise I don't see
how it could close the fd before executing the process.


From exarkun at divmod.com  Mon May  5 10:34:12 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 10:34:12 -0400
Subject: Nested os.path.join()'s
In-Reply-To: <1209997713.7106.32.camel@paul-laptop>
Message-ID: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>

On Mon, 05 May 2008 16:28:33 +0200, Paul Scott <pscott at uwc.ac.za> wrote:
>
>On Mon, 2008-05-05 at 16:21 +0200, Paul Scott wrote:
>> example:
>>
>> if os.path.exists(os.path.join(basedir,picdir)) == True :
>>     blah blah
>>
>
>Sorry, pasted the wrong example...
>
>Better example:
>
> pics =  glob.glob(os.path.join(os.path.join(basedir,picdir),'*'))
>
>
>> Question is, is there a better way of doing this? The above *works* but
>> it looks kinda hackish...

How about not nesting the calls?

    >>> from os.path import join
    >>> join(join('x', 'y'), 'z') == join('x', 'y', 'z')
    True
    >>>

Jean-Paul


From goldnery at gmail.com  Sat May 24 03:39:06 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 24 May 2008 00:39:06 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com> 
	<57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com> 
	<a99a78e0-8b94-46f7-a7fd-64350b617236@79g2000hsk.googlegroups.com>
Message-ID: <e3ca9bbb-0c23-455d-a6b2-e22b3397a6c1@e53g2000hsa.googlegroups.com>

On May 23, 10:47 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 1:44 pm, Gandalf <goldn... at gmail.com> wrote:
>
> > you've been very helpful but still i have only one problem. I wont the
> > window not to be close after clicking the X button.
> > I wont the program to stay on the toolbar
>
> > thanks!
>
> Well then, in your event handler, just don't do anything.
>
> def onClose(self, event):
>     pass
>
> or maybe you want to hide the frame?
>
> def onClose(self, event):
>     self.frame.Hide()
>
> Just make sure you give the user some other way to close it and in
> that handler, you'll need to call self.frame.Destroy().
>
> Alternatively, you can just tell the frame not to create the "X"
> button:
>
> self.frame = wx.Frame(None, -1, title="My Frame",
> style=wx.SYSTEM_MENU)
>
> However, that makes it pretty annoying to close.
>
> Mike

OK the first method still didn't work. no matter what i do the window
keep closing but the last one worked nice and all the top menu
disappear

thanks!


From sturlamolden at yahoo.no  Tue May 20 13:51:55 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 10:51:55 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<g0u3c9$1fec$3@news.mtu.ru>
	<BqadnXADgL7GlK7VnZ2dnUVZ_gednZ2d@posted.visi>
Message-ID: <7bd9e6b7-840a-4b08-b5d0-c22ca9503c9c@l64g2000hse.googlegroups.com>

On May 20, 7:24 pm, Grant Edwards <gra... at visi.com> wrote:

>
> http://docs.python.org/lib/module-ctypes.html
>

Also see Cython (or Pyrex if you prefer the original). With Cython it
is easy to call C functions, but Cython also alleviates the need for C
to a great extent. The advantage of Cython over C + ctypes is of
course the readability of Python and the presence of Python built-in
types like strings, dicts and lists. Unfortunately, it is still a bit
difficult to use NumPy ndarrays with Cython or Pyrex. NumPy ndarrays
work very well with ctypes though.

http://www.cython.org/












From castironpi at gmail.com  Fri May 16 10:14:57 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:14:57 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<8763tea9sd.fsf@mulj.homelinux.net>
Message-ID: <e4be9248-859c-4645-b615-c04116775289@8g2000hse.googlegroups.com>

On May 16, 4:16 am, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> "??" <littlesweetme... at gmail.com> writes:
> > Howdy,
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> Because the default object class doesn't have a dict or other
> indication of state.  It's a "pure" Python object whose only visible
> properties are its type and its identity.  (On the implementation
> level it also has a refcount.)
>
> This is necessary because all other Python objects (both new-style
> classes and C extensions) inherit from 'object', on the C level.
> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.
>
> Subclassing object instructs Python as to what kind of state you want
> your class to have.  The default is to have a dict to store
> properties:
>
> # a class with dict -- any property goes through dict, and creating a
> # Foo object actually creates two objects, one Foo and one dict
> class Foo(object):
>     pass
>
> But you can also specify:
>
> # an efficient 'Pair' class holding two objects
> class Pair(object):
>     __slots__ = 'first', 'second'
>
> Instances of Pair take up even less room that 2-element tuples
> because they don't carry the size information in the object.
>
> Now, if the object class carried a dict with it, it would be
> impossible to create a class like 'Pair'.
>
> > To make it correct, we have to create a new class:
> > class MyClass(object): pass
> > a = MyClass()
> > a.b = 1       # OK
>
> > Does this strange behavior break the LSP (Liskov substitution
> > principle)?
>
> It follows from LSP that what the subclass may not introduce new
> preconditions.  In this case the subclass accepts a case that the
> original class didn't, so it doesn't introduce a new precondition, it
> simply weakens (removes) an existing one.

Honor and narrow down:

> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.

to:

mass & volume, probably isolating -same-object- and -state-.  No
sinking.


From Scott.Daniels at Acm.Org  Sun May  4 10:58:18 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 04 May 2008 07:58:18 -0700
Subject: Colors for Rows
In-Reply-To: <mailman.342.1209497983.12834.python-list@python.org>
References: <4dc0cfea0804290733ic99e45eyec23a6d5b719eb8@mail.gmail.com>	<20080429121105.f10c3862.darcy@druid.net>	<4dc0cfea0804291114p4680f4bgb8446e7c6cb842cb@mail.gmail.com>	<1209495803.5173.11.camel@aalcdl07.lib.unc.edu>
	<mailman.342.1209497983.12834.python-list@python.org>
Message-ID: <cv-dnW3EftaBUIDVnZ2dnUVZ_smnnZ2d@pdx.net>

D'Arcy J.M. Cain wrote:
> On Tue, 29 Apr 2008 15:03:23 -0400
> "J. Cliff Dyer" <jcd at sdf.lonestar.org> wrote:
>> Or, if you aren't sure how many colors you'll be using, try the more
>> robust:
>>
>> bg[z % len(bg)]
> 
> Good point although I would have calculated the length once at the
> start rather than each time through the loop.
> 
You may be surprised to find out that len(foo) is typically a
retrieval question, not so much a calculation.  Of course, measure
anything you care about, and special methods may do much more, but
in general, go for the simplest, clearest code you can write, and
then speed it up when it needs it.

I'd use len(bg) above unless my code was littered with calls to
len of the same thing, in which case it might it might be clearer
to choose a good name for len(bg).

--Scott David Daniels
Scott.Daniels at Acm.Org


From duncan.booth at invalid.invalid  Sat May  3 16:51:41 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 May 2008 20:51:41 GMT
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <Xns9A93DE69E5784duncanbooth@127.0.0.1>

dave <squareswallower at y1a2hoo3.com> wrote:

> Hello,
> 
> here is a piece of code I wrote to check the frequency of values and 
> switch them around to keys in a new dictionary.  Just to measure how 
> many times a certain key occurs:
> 
> def invert(d):
>      inv = {}
>      for key in d:
>           val = d[key]
>           if val not in inv:
>                inv.setdefault(val, [key])
>           else:
>                inv[val].append(key)
>      return inv
> 
> 
> Using the methods above (I'm just a beginner) could I have written it 
> more concisely?  Any criticism/critique in the code would be greatly 
> appreciated.
> 
The obvious change I'd make is:


     if val not in inv:
         inv[val] = key
     else:
         ... etc.

The setdefault method is only appropriate if you don't know 
whether or not the key is in the dictionary. since you've already tests 
that you should just go ahead and set the value.
Otherwise it all seems fine.


From george.sakkis at gmail.com  Wed May 28 18:10:41 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 28 May 2008 15:10:41 -0700 (PDT)
Subject: Writing a function from within Python
References: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>
Message-ID: <3c3f7866-75df-43c7-bbc6-cd2b80641a24@k30g2000hse.googlegroups.com>

On May 28, 4:39 pm, Aaron Scott <aaron.hildebra... at gmail.com> wrote:
> Is it possible to change the content of a function after the function
> has been created? For instance, say I make a class:
>
>         class MyClass:
>                 def ClassFunction(self):
>                         return 1
>
> And I create an object:
>
>         MyObject = MyClass()
>
> Is there any way to change the content of the function, a la pseudo-
> code:
>
>         MyObject.ClassFunction = "return 2"
>
> Thanks for any insight you might be able to offer.

The short answer is "yes". The longer answer is "yes but most likely
there are better approaches to whatever you want to do". If you give a
bit more context of the general problem you're trying to solve, I'm
sure you'll get more helpful replies.

George


From hdante at gmail.com  Thu May 22 00:41:13 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:41:13 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com> 
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>
Message-ID: <8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>

On May 22, 1:36?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 22, 1:26?am, Henrique Dante de Almeida <hda... at gmail.com>
> wrote:
>
>
>
> > On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
> > >>> a = 1e16-2.
> > > >>> a
> > > 9999999999999998.0
> > > >>> a+0.999 ? ? # gives expected result
> > > 9999999999999998.0
> > > >>> a+0.9999 ? # doesn't round correctly.
>
> > > 10000000000000000.0
>
> > ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> > ?1e16-2 == 0x1.1c37937e07fffp+53
> > ?1e16 == 0x1.1c37937e08p+53
>
> > ?(that is, the hex representation ends with "7fff", then goes to
> > "8000").
>
> > ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> > This is not a bug, it's a feature.
>
> ?I didn't answer your question. :-/
>
> ?Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
> by default. So that's strange.
>
> ?The following code compiled with gcc 4.2 (without optimization) gives
> the same result:
>
> #include <stdio.h>
>
> int main (void)
> {
> ? ? ? ? double a;
>
> ? ? ? ? while(1) {
> ? ? ? ? ? ? ? ? scanf("%lg", &a);
> ? ? ? ? ? ? ? ? printf("%a\n", a);
> ? ? ? ? ? ? ? ? printf("%a\n", a + 0.999);
> ? ? ? ? ? ? ? ? printf("%a\n", a + 0.9999);
> ? ? ? ? }
>
> }
>
>

 However, compiling it with "-mfpmath=sse -msse2" it works. (it
doesn't work with -msse either).


From banibrata.dutta at gmail.com  Mon May 12 13:43:35 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 23:13:35 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
	<fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>
Message-ID: <3de8e1f70805121043g786df5a4u2225862253858b87@mail.gmail.com>

Thank you all for the pointers and precise information.
Python community support surely rocks!!


On 5/12/08, Daniel Fetchinson <fetchinson at googlemail.com> wrote:
>
> > >>  Again a noob question.
> > >>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces ,
> is it
> > >> correct to conclude that there is no RDBMS agnostic, single/uniform
> DB
> > >> access API for Python ?
> > >> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> > >>  How is the RDBMS change handled for solutions which need to work
> with
> > >> different RDBMSs ??
> > >>
> > > http://www.python.org/dev/peps/pep-0249/
> > >
> >
> >
> > That appears to be only an API specification. Are there any
> implementations
> > of that ?
>
> For sqlite: http://oss.itsystementwicklung.de/trac/pysqlite/ if you
> have python < 2.5 for 2.5 and up it is included in the stdlib
>
> For mysql: http://sourceforge.net/projects/mysql-python
>
> There are a tons more, including postgresql, oracle, etc:
> http://wiki.python.org/moin/DatabaseInterfaces
>
> Cheers,
> Daniel
> --
> Psss, psss, put it down! - http://www.cafepress.com/putitdown
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From lists at cheimes.de  Mon May 12 12:30:39 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 12 May 2008 18:30:39 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09m9n$c8h$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>	<482855df$0$14196$9b622d9e@news.freenet.de>
	<g09m9n$c8h$1@theodyn.ncf.ca>
Message-ID: <482870AF.6020500@cheimes.de>

Colin J. Williams schrieb:
>> See PCbuild/readme.txt.
> 
> I presume that this is PCbuild8.txt

No, it's PCbuild/readme.txt in Python 2.6 and 3.0

By the way you can call Tools\buildbot\external.bat from the root
directory of the 2.6 and 3.0. It checks out and build the dependencies.
The script requires the VS 9.0 tools and the svn command line executables.

Christian



From gagsl-py2 at yahoo.com.ar  Mon May 26 19:23:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 20:23:39 -0300
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <op.ubsa9p0sx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 17:02:21 -0300, Russ P. <Russ.Paielli at gmail.com>  
escribi?:
> On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk>  
>> escribi?:
>>> On May 26, 6:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
>>>> I am also bothered a bit by the seeming inconsistency of the rules for
>>>> the single underscore. When used at file scope, they make the variable
>>>> or function invisible outside the module, but when used at class
>>>> scope, the "underscored" variables or functions are still fully
>>>> visible. For those who claim that the client should be left to decide
>>>> what to use, why is the client prohibited from using underscored
>>>> variables at file scope?
>>
>> There is no rationale because this is not how it works... [snip  
>> explanation of how import works]
>
> Well, that's interesting, but it's not particularly relevant to the
> original point. By default, underscored variables at file scope are
> not made visible by importing the module in which they appear. But
> underscored member variables of a class *are* made visible to the
> client by default. That's seems at least slightly inconsistent to me.

To make things clear: _variables ARE visible when you import a module:

C:\TEMP>type module.py
_variable = 123

(invoke python)
py> import module
py> module._variable
123
py> dir(module)
['__builtins__', '__doc__', '__file__', '__name__', '_variable']
py>
py> from module import _variable
py> _variable
123

Only when you use "from module import *" _variable isn't imported.
(new python session):

py> from module import *
py> _variable
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name '_variable' is not defined

That last form should not be used normally, except when playing with the  
interactive interpreter.

> The issue here, for me at least, is not whether the data or methods
> should be absolutely hidden from the client. I'm perfectly willing to
> say that the client should have a back door -- or even a side door --
> to get access to "private" data or methods.
>
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.
>
> Is this a major issue? No. Is it a significant issue. Yes, I think so.

Ok, that's what you'd like Python to be. Unfortunately your view appears  
not to be shared by the language developers.

> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.

Python data model is centered on namespaces, and it's hard to tell whether  
certain attribute is being accessed from "inside the class" or from  
"outside the class" in order to allow or deny access.
It's not like static languages where the whole class definition has a  
certain lexical scope and it can't be modified afterwards; the set of  
allowed attributes is fixed at compile time. In Python you can  
add/remove/alter attributes (including methods) dynamically. You can  
create classes without using the class statement. The same method may be  
shared by many unrelated classes. If you can devise a practical and  
efficient mechanism to determine access right in all those varying  
circumstances, please post it to the python-ideas list for further  
discussion. (In the meantime we'll continue to use a naming convention for  
us consenting adults.)

> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

I like the fact that the mere attribute name conveys useful information  
abut its intended usage. And I don't care about the _, it doesn't look  
ugly to me. But that's just my personal opinion.

-- 
Gabriel Genellina



From Scott.Daniels at Acm.Org  Sat May 24 10:37:00 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 24 May 2008 07:37:00 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <mailman.1525.1211632496.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <DcCdnTamgM1quKXVnZ2dnUVZ_gednZ2d@pdx.net>

David wrote:
> Specifically, if you've just written 100 new lines of Python code, then:
> 1) How do you test the new code?
> 2) How do you ensure that the code will work correctly in the future?
> 
> Short version:
> 
> For (1) I thoroughly (manually) test code as I write it, before
> checking in to version control.
> 
> For (2) I code defensively.
> 
...
> As for point 1 (how do you test the new code?):
> I like the idea of automated unit tests. However, in practice I find
> they take a long time to write and test, especially if you want to
> have good coverage (not just lines, but also possible logic branches).
This is why I have reluctantly come to accept the XP people's view:
if you you write the tests _as_ you develop (that is as far as I go
w/o re-enforcement; they would have you write them _before_), you will
have a body of tests that work to demonstrate the correctness or
deficiencies of your code based on what it _should_ do.  If you write
tests after you've written the code, you will write tests that are
based on what your code _actually_does_.  You don't want the latter;
the tests are brittle.  The tests don't match needs, rather they
match implementations.  Therefore you'll need to discard more tests at
every local rewrite.

> 1) Add "raise 'UNTESTED'" lines to the top of every function
String exceptions are deprecated.  Just raise UNTESTED (and let the
access to undefined global error be the issue).
...<describes how to do code coverage by hand>...
> 11) Cause those sections of code to be run also (sometimes I need to
> temporarily set vars to impossible values inside the script, since the
> logic will never run otherwise)
> 
> And here is one of my biggest problem with unit tests. How do you unit
> test code which almost never runs? The only easy way I can think of is
> for the code to have 'if <some almost impossible condition> or <busy
> running test case XYZ> lines'. I know I'm meant to make 'fake' testing
> classes which return erroneous values, and then pass these objects to
> the code being tested. But this can take a long time and even then
> isn't guaranteed to reach all your error-handling code.
Ah, but now you tests are "brittle"; they only work for the code you 
have now.
If you want to make sure you have code coverage with your test, the XP
way is:
     Write a test for behavior you need.
     Watch it fail.
     Fix the code so all tests pass.
     Lather, rinse, repeat.
You should not have untested code, because there was no test that made
you write it.  If you want to do code coverage, find a code coverage
tool and count your code while runnign your unit tests.


--Scott David Daniels
Scott.Daniels at Acm.Org


From daveparker at flamingthunder.com  Tue May 13 13:41:00 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:41:00 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
Message-ID: <bccdfe5d-c880-4a39-95c6-18bf72ba2fdf@s33g2000pri.googlegroups.com>

Time for me to get back to work now.  Thank you all for your comments,
they will help to make Flaming Thunder a better product.  I can see
that many people would like the ability to link to existing
applications and libraries, etc, so I will raise that on my priority
list.


From tinnews at isbd.co.uk  Thu May 15 06:52:44 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 15 May 2008 10:52:44 GMT
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
	<3c0c.482c0fc1.3224e@altium.nl>
Message-ID: <482c15fc$0$656$bed64819@news.gradwell.net>

Kees Bakker <spam at altium.nl> wrote:
> 
> So far, I have seen only one editor that understands the difference between
> TABs and indentation, and that is Emacs.

Most vi clones (and the original vi) do too!  :-)

E.g. in the clone I use (vile) there are independent settings for
tabstop and shiftwidth.  In addition you can tell the editor to change
tabs to spaces (or not) as you wish.

-- 
Chris Green


From mensanator at aol.com  Sun May 11 00:16:15 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 21:16:15 -0700 (PDT)
Subject: Prettyprinting SQL statements
References: <flossy-5582CC.20235310052008@comcast.dca.giganews.com>
Message-ID: <c78a2471-96a6-4795-b7a5-f9676cee0609@z72g2000hsb.googlegroups.com>

On May 10, 10:23?pm, MooJoo <flossy at bobbsey_twins.com> wrote:
> I'm building a Python app that will be making queries to a MySQL server
> using the MySQLdb module. The app will need to create SQL statements on
> the fly which, in addition to going to the server, will occasionally
> need to be displayed to the user. While these queries are not too
> complex, they still can be difficult to decipher without doing some
> formatting. I've done the requisite Googling to see if a library to
> format SQL can be found but, other than commericial Windows apps and
> some on-line formatters, I've not found anything remotely usable. Before
> trying to write my own parser/formatter, I was hoping somebody might
> know of a package to perform this function.
>
> Anybody? Ferris? Anybody at all?
>
> Thanks.

I always just do this:

def keyword(s):
  if s.isupper():
    return '\n'+s+'\t'
  else:
    return s
sql = "SELECT letter.*,letter1.* FROM letter,letter AS letter1 ORDER
BY letter.n;"
s = sql.split()
pp = ' '.join(map(keyword,s))
print pp

Then insert the pp strings into my source code as shown.

# unjoined tables create a Cartesian Product
#
import sqlite3

con = sqlite3.connect(":memory:")
cur = con.cursor()
cur.executescript("""
create table letter(n);
""")

letters = [('a'),('b'),('c'),('d'),('e'),('f'),('g'),('h')]

cur.executemany("""
INSERT
INTO	 letter(n)
VALUES	 (?);
"""
, letters)

cur.execute("""
SELECT	 letter.*,letter1.*
FROM	 letter,letter
AS	 letter1
ORDER
BY	 letter.n;
""")

cartesian_product = cur.fetchall()

for i in cartesian_product:
   print i[0]+i[1],


From daveparker at flamingthunder.com  Mon May 19 23:33:43 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:33:43 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
Message-ID: <b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>

On May 14, 7:59?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Would it be valid to say:
>
> x = "concrete"
>
> or to say:
>
> if command (is) set to "quit"
>
> ??????

I like the idea of:

If command is set to "quit" ...

I've added it to my list of things to think about, and possibly
implement.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:09:13 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:09:13 +0200
Subject: explain this function to me, lambda confusion
In-Reply-To: <74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
Message-ID: <48327914$0$30041$426a74cc@news.free.fr>

Paul McGuire a ?crit :
> On May 19, 11:04 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Paul McGuire <pt... at austin.rr.com> writes:
>>
>> [...]
>>
>> Could you use it as a decoratore instead?
>>
>> integer = Word("0123456789")
>>
>> @integer.setParseAction
>> def parse_integer(tokens):
>>     return int(tokens[0])
>>
>> I could make your grammar clearer, because you don't mix it with
>> processing code... and no need for lambdas!
> 
> What a sexy little idiom!  You could really apply this to any API
> method that accepts a callable as a single argument, and pyparsing
> actually has several of these:
> 
> setParseAction
> addParseAction
> setFailAction
> setDebugActions
> 
> (Unfortunately, setDebugActions requires 3 callables for its arguments
> - one to be run when an expression is about to be parsed, one to be
> run after parsing is complete, and one to be run if the expression
> fails to be parsed.  So setDebugActions can't be used in this
> decorator manner.)

You just have to provide three decorators instead, one for each callback.

> 
> Using these methods as decorators deviates from the typical decorator
> usage model as I understand it - instead of wrapping the provided
> function within some enclosing setup/teardown code (like lock/unlock,
> or open-file/close-file, or begin-transaction/commit-transaction), and
> then returning the created wrapper function, the decorator usage you
> propose is one in which the decorator uses the provided function with
> some side-effect (such as setting a property), but then just returns
> the original function.

This is already a well-known decorator pattern. It's used in CherryPy to 
mark methods that are exposed as request handlers.



From roy at panix.com  Fri May  2 10:11:36 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 10:11:36 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
Message-ID: <roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>

In article <87r6ckzvyv.fsf at benfinney.id.au>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Whereas if Python is *not* installed from an OS package, it's up to
> the sys admin to ensure that it works -- not up to my program. So I
> don't see the point in making it work by default, when what I want for
> my program is that it works *with the default Python*, not with some
> non-default installation.

Ben,

Have you ever shipped software to a customer?  Imagine the following 
conversation:

Customer: "Your product is broken.  It says it can't find python, and I 
know I have it installed".

Vendor: "Where do you have it installed?"

Customer: "In /opt/bin/python"

Vendor: "Oh, that's your problem, it HAS to be in /usr/bin/python".

Customer: "I can't install it there because <insert whatever silly reason 
the customer has>.  If you can't make your product work without requiring 
me to install python in /usr/bin, I'm afraid I can't buy your product".

Vendor: "No problem sir, I'll be happy to tell our sales folks to stop 
bothering you".

If you want to hard-code /usr/bin/python into your application, that's your 
decision.  If you would like to take on the task of convincing every 
sysadmin in the world to do things the way you think they should be done, 
have fun.


From maxm at mxm.dk  Mon May 26 04:26:24 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 10:26:24 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <g1ds7g$6rq$1@ger.gmane.org>

erik.oosterwaal at gmail.com skrev:
> Hi All,

> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.

Hi Erik,

I am an experienced Python developer working mostly in Plone. Before 
that I came from asp like you.


If you want something that is most like what you are used to, you should 
check out Django. I have not worked in it, but it get high praises from 
developers I trust.

http://www.djangoproject.com/


If you want a more "modern" approach you should check out Grok. It has 
been built on all the experiences made with Zope 2, CMF and Plone. It is 
based on Zope 3.

http://grok.zope.org/

It is the one I would choose if starting from fresh today.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From destroooooy at gmail.com  Mon May 19 15:39:36 2008
From: destroooooy at gmail.com (destroooooy)
Date: Mon, 19 May 2008 12:39:36 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>

I'm wondering what is the canonical usage of the keywords 'is' and
'not' when you're writing conditionals and loops. The one I've been
following is completely arbitrary--I use the symbols '==', '!=' for
numerical comparisons and the words 'is', 'not' for everything else.

Thanks in advance!


From ivan.illarionov at gmail.com  Sat May 17 00:01:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 04:01:50 +0000 (UTC)
Subject: Classmethods are evil
Message-ID: <g0llbe$2k6o$1@news.mtu.ru>

After re-reading "Python is not Java" I finally came to conclusion that 
classmethods in Python are a very Bad Thing. 

I can't see any use-case of them that couldn't be re-written more clearly 
with methods of metaclass or plain functions.

They have the following issues:
1. You mix instance-level and class-level functionality in one place 
making your code a mess.
2. They are slower than metaclass methods or plain functions.

I really want to hear your opinions on the subject.

-- Ivan


From wmcbrine at users.sf.net  Wed May 28 01:01:37 2008
From: wmcbrine at users.sf.net (William McBrine)
Date: Wed, 28 May 2008 05:01:37 GMT
Subject: Keeping focus with sequential Tkinter windows?
Message-ID: <RG5%j.9823$9H6.3882@trnddc04>

So, basically what I'm doing is this:

window1 = Tkinter.Tk()
...
window1.destroy()
...
window2 = Tkinter.Tk()

This works well in Linux and Mac OS X (and the PyGtk equivalent works on 
all platforms), but in Windows XP, the second window comes up without 
focus. (I have to click on it to focus it.) This is true even with no 
other windows on screen. I've tried window2.focus_set(), window2.lift(), 
etc., to no avail. What's the right way to do this?

-- 
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- pass it on


From bignose+hates-spam at benfinney.id.au  Sat May 24 10:00:32 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 00:00:32 +1000
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <87zlqfajjz.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of
> naming the attribute with a single leading underscore. This is a
> string signal that the attribute is part of the implementation, not
> the interface.

Quite apart from whether it's a string signal, I meant to write that
it's a *strong* signal.

-- 
 \        "Some people, when confronted with a problem, think 'I know, |
  `\       I'll use regular expressions'. Now they have two problems." |
_o__)                           ?Jamie Zawinski, in alt.religion.emacs |
Ben Finney


From basti.wiesner at gmx.net  Sat May 17 14:16:05 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 17 May 2008 20:16:05 +0200
Subject: Install man-pages with distutils/setuptools
References: <482ec6e0$0$6774$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <g0n7d5$vs1$01$1@news.t-online.com>

[ Hartmut Goebel <h.goebel at goebel-consult.de> ]

> Hi,
> 
> is there a standard way or a snippet for installing man-pages with
> 
>    python set.py install
> 
> when using distutils or setuptools?
No, not even setuptools provides a standard way for man pages.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Tue May 13 13:32:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 19:32:30 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <68u1lqF2sv8gjU1@mid.uni-berlin.de>

Dave Parker schrieb:
>> Just to support this statement: PHP runs an order of magnitude slower than
>> python. Yet a great deal (if not the majority) of dynamic sites out there
>> run under PHP. All of these are unhappy customers?
> 
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.

Slow websites mainly come from bad coding. I've seen websites performing 
slow written in Java - which should even surpass FT, btw.

> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
> 
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"
> http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss


You obviously have no clue what this aboven statement talks about. It is 
not about speed - it's about how HTML is generated, and the negative 
impact of visual design tools on that. What on earth has that to do with 
the execution speed of a webapp?

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

"Faster" wins, yes - in the sense of brain-cycles. Faster coding, faster 
changing, faster delivering. If it was anything else, we wouldn't have 
higher level languages, and still code assembler.

You really don't know what you are talking about. But you are of course 
entitled to your opininon. Time will tell who is the "fad", and who not. 
I can assure you I have a strong opinion on that....

Diez


From notbob at nothome.com  Wed May  7 10:38:32 2008
From: notbob at nothome.com (notbob)
Date: Wed, 07 May 2008 14:38:32 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<995582f9-754f-4f6e-857e-8156ea7b0b20@56g2000hsm.googlegroups.com>
Message-ID: <I9jUj.25744$em5.11581@fe117.usenetserver.com>

On 2008-05-06, hdante <hdante at gmail.com> wrote:

>  When you have a problem with your code, always post here the complete
> code and a complete execution. For example:

I'll keep this example.  Thnx.


>  /----------\  glued
> |  bruce   | ------> 42
>  \----------/
>
>  When you use a stamp, it returns what it's glued on:
>
> >>> bruce = 42  # glue a stamp
> >>> print bruce # use the stamp
>  42

>  'bruce' is a string (notice the quotes). In this case bruce is glued
> to 'bruce':
>
>  /----------\  glued
> |  bruce   | ------> 'bruce'
>  \----------/

The light is dawning.....  

>  Stupid. Not really. :-) I'd rather say that the problem is the book.

Well, me too, of course.  ;)  

> The book is just another introduction to programming. There's no
> special attempt to make the reader learn to think like a computer
> scientist.

Apparently, and I understand.  It's hard for someone who is very
knowledgable on a subject to remain in "explain it like they're 5 yrs old"
mode.  It's tedious and time consuming.

>> How am I supposed to get the original def to work?  I've yet to figure out

>  file myfile.py:
> -------------------------------
> def print_twice(bruce):
> 	print bruce, bruce
>
> print_twice('bruce')
> print_twice(2)
> -------------------------------
>
> execution:
> -------------------------------
> $ python myfile.py
> bruce bruce
> 2 2

BINGO!  (and it worked (after I got the indents right))

>  Finally, you don't understand something, ask again.

Thank you.  I really do appreciate your taking the time to break it down
so completely.  I found another python book (A Byte of Python) that keeps it
simple enough for me.  I'm not really a programmer, but I decided to do
something to challenge this old geezer brain and figured this would keep it
awake.  

I'd also like to thank all you other folks who responded.  I got some good
info and tips from all of you.  

nb


From iqbaltalaat at gmail.com  Fri May 16 12:06:27 2008
From: iqbaltalaat at gmail.com (I-T)
Date: Fri, 16 May 2008 09:06:27 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
	<781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>
	<m28wya8dd2.fsf@googlemail.com>
Message-ID: <c0eaf575-4b65-4a8f-ad53-0718fd14885a@1g2000prg.googlegroups.com>

A thousand apologies for my ignorance. I'll try not to get names mixed
up again in the future.

On May 16, 8:42?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> afrobeard <afrobe... at gmail.com> writes:
> > Arnaud's code wont work if self.opt1 is None, an empty list, an empty
> > tuple, False, etc, because all these evaluate to false. They wont
> > print the internal state of these variables. [Just an informational
> > notice, this may be the behavior you expect]
>
> ??? My suggestion is to get rid of attributes altogether and does not
> test any truth values.
>
>
>
> > Secondly, I'm not sure if you know the variable names from before hand
> > in which case Casey's approach will work, or you need to know them via
> > introspection.http://www.ibm.com/developerworks/library/l-pyint.html
> > [Scroll down to attributes].
>
> > On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> >> Casey <casey.mcgi... at gmail.com> writes:
> >> > Hi,
>
> >> > I have some classes that print variable outputs depending on their
> >> > internal state, like so:
>
> >> > def __str__(self):
> >> > ? ? out = []
> >> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
> >> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
> >> > ? ? ....
> >> > ? ? return '\n'.join(out)
>
> >> > Is there any way to make this cleaner?
>
> >> Maybe.
>
> >> Have a dictionary of options rather than individual attributes;
> >> options not in the dictionary are not set. E.g.
>
> >> mask = {
> >> ? ? 'opt1': 'option 1 is %s',
> >> ? ? 'opt2': 'option 2 is %s',
> >> ? ? ...
> >> ? ? }
>
> >> def __str__(self):
> >> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>
> >> --
> >> Arnaud



From roy at panix.com  Fri May  2 14:03:47 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 14:03:47 -0400
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
Message-ID: <roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>

In article 
<59915ad0-2af1-4903-8ffd-48da2ce4e647 at y22g2000prd.googlegroups.com>,
 mp <mailpitches at email.com> wrote:

> Code is at bottom. Basically, if I turn off socket blocking prior to
> connecting, I get a "Socket is not connected" error when I try to send
> data. However, if I do not turn off blocking, OR if I place a print
> statement anywhere before the send call, it works! WTF?
> 
> I'd like to understand what's going on in the background here, if you
> know don't skimp on the details.
> 
> Thanks
> 
> ---------------------------------------------------------------
> import
> socket
> sock = socket.socket(socket.AF_INET,
> socket.SOCK_STREAM)
> sock.setblocking(0)
> sock.connect_ex(('localhost',
> 9000))
> sock.setblocking(1)
> sock.send('foo')
> sock.close()

I can't be 100% sure about this because I don't know what's running on your 
port 9000 that you're trying to connect to, but I think I know what's going 
on.

I just tried your code, but changed 9000 to 22 (ssh).  What I found is that 
if you eliminate the setblocking(0) call, the connect_ex() call returns 0, 
indicating it succeeded.  If you leave the setblocking(0) call in, 
connect_ex() returns EINPROGRESS (Operation now in progress).  This makes 
sense.  Here's the code:

import socket
import os
import errno

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setblocking(0)
err = sock.connect_ex(('localhost', 22))
print errno.errorcode[err], os.strerror(err)

When you do a TCP connect, there is what's called a three-way handshake 
that happens between the TCP stacks at the two ends of the connection.  I 
send a packet with the SYN bit set, you respond with a packet with both SYN 
and ACK set, and I respond with an ACK.  Even when both ends are on the 
same box (i.e. localhost), this has to happen.

Quoting from http://docs.python.org/lib/socket-objects.html:

> Some notes on socket blocking and timeouts: [...] In non-blocking mode, 
> operations fail (with an error that is unfortunately system-dependent) if 
> they cannot be completed immediately.

Since the three-way handshake can't be completed immediately, the 
connect_ex call fails when you try it in non-blocking mode.

So, that's the explanation.  Now the question: What are you trying to do 
that you need non-blocking mode?  Or are you just experimenting to see what 
happens?

BTW, this was done on an OSX-10.5.2 box, but I think the result would be 
essentially the same on any platform.


From gagsl-py2 at yahoo.com.ar  Thu May  1 04:41:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 05:41:37 -0300
Subject: Sending Cntrl-C ??
References: <0274834e-17e1-4a95-88ec-f2aa77aeb3a9@k10g2000prm.googlegroups.com>
	<mailman.350.1209505715.12834.python-list@python.org>
	<a2656a56-739c-4a36-bfb3-1ef785ef6edd@p25g2000pri.googlegroups.com>
	<fv8c4q$kmd$1@ger.gmane.org>
	<mailman.367.1209546765.12834.python-list@python.org>
	<8d53535b-b00e-40b4-b65f-1ca126884592@k10g2000prm.googlegroups.com>
Message-ID: <op.uagvrnaix6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 30 Apr 2008 15:06:13 -0300, gamename <namesagame-usenet at yahoo.com>  
escribi?:

>> win32api.GenerateConsoleCtrlEvent(win32con.CTRL_C_EVENT, pgid)
>
> How do you determine the value of 'pgid'?

Make the child start a new process group, then its pid is the process  
group ID. You have to use the "creationflags" parameter of subprocess.open
The documentation for GenerateConsoleCtrlEvent  
http://msdn.microsoft.com/en-us/library/ms683155.aspx states that you  
can't send CTRL_C_EVENT to another process group, only CTRL_BREAK_EVENT  
(and only to the same console as the sender process). A little example:

<code>
import subprocess
import ctypes
import time

CREATE_NEW_PROCESS_GROUP = 512
CTRL_C_EVENT = 0
CTRL_BREAK_EVENT = 1
GenerateConsoleCtrlEvent = ctypes.windll.kernel32.GenerateConsoleCtrlEvent

print "start child process"
p = subprocess.Popen("cmd /c for /L %d in (10,-1,0) do @(echo %d && sleep  
1)",
         creationflags = CREATE_NEW_PROCESS_GROUP)
print "pid=", p.pid
print "wait 3 secs"
time.sleep(3)
print "send Ctrl-Break"
GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, p.pid)
print "wait for child to stop"
print "retcode=", p.wait()
print "done"
</code>

Output:

start child process
pid= 872
wait 3 secs
10
9
8
7
send Ctrl-Break
wait for child to stop
retcode= 255
done

(Instead of ctypes and those magical constants, you can install the  
pywin32 package and use win32api.GenerateConsoleCtrlEvent,  
win32con.CTRL_BREAK_EVENT and win32process.CREATE_NEW_PROCESS_GROUP)

The only way I know of to send a Ctrl-C event to a different console  
involves remote code injection.

-- 
Gabriel Genellina



From castironpi at gmail.com  Wed May  7 14:07:45 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 11:07:45 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org> 
	<64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>
Message-ID: <12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>

On May 7, 9:07?am, castiro... at gmail.com wrote:
> '''
> On May 6, 4:43 pm, pyt... at bdurham.com honoring:
>
> >>> a.next( )
> ( "I", )
> >>> a.throw( up )
> ( "I", "A" )
> >>> a.next( )
> ( "I", "B" )
> >>> a.next( )
> ( "I", "C" )
> >>> a.throw( down )
>
> ( "II", )
> '''
>
> #funny declaration
> class up( Exception ): pass
> class down( Exception ): pass
>
> def outline( ):
> ? ? stack= [ 1 ]
> ? ? while 1:
> ? ? ? ? try:
> ? ? ? ? ? ? yield stack
> ? ? ? ? ? ? stack[ -1 ]+= 1
> ? ? ? ? except up:
> ? ? ? ? ? ? stack.append( 1 )
> ? ? ? ? except down:
> ? ? ? ? ? ? stack.pop( -1 )
> ? ? ? ? ? ? stack[ -1 ]+= 1
>
> a= outline( )
> print a.next( )
> print a.throw( up )
> print a.next( )
> print a.next( )
> print a.throw( down )
> print a.throw( up )
> print a.throw( up )
> print a.next( )
> print a.next( )
> print a.throw( down )
>
> ##output:
>
> [1]
> [1, 1]
> [1, 2]
> [1, 3]
> [2]
> [2, 1]
> [2, 1, 1]
> [2, 1, 2]
> [2, 1, 3]
> [2, 2]
>
> ##
>
> cf.
>
> formatter.NullFormatter.format_counter
> formatter.NullFormatter.format_letter
> formatter.NullFormatter.format_roman

One execution of Python 3a4 included in built-ins.

Python 3.0
 win32
Type "help
>>> next
<built-in
>>>

Do you want send and throw in it too?


From rocky at panix.com  Thu May 15 07:26:07 2008
From: rocky at panix.com (R. Bernstein)
Date: Thu, 15 May 2008 07:26:07 -0400
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
Message-ID: <wihr6c33j1s.fsf@panix5.panix.com>

"Alan J. Salmoni" <salmoni at gmail.com> writes:
> I'm not sure if this is exactly what you're after, but try looking
> into the 'code' module.
>
> It's fairly easy to make an interactive interpreter that runs within
> your program. If you import your programs variables into
> __main__.__dict__, you can have access to them which can be funky. You
> can even override the showtraceback method to catch various exceptions
> and do daft things like adding new methods to strings. I guess it
> would even be possible to have the commands compared to a list of
> commands and keywords to build a restricted interpreter, though how
> secure this would be against a determined attack is another matter.
>
> Alan

I think this (largely) does the trick. Thanks!

I'm not sure about how to deal with globals yet which should come from
a stackframe f_globals. It might be possible to save and restore
__main__.__dict__ before and after the call to interact(). Probably
would have been cooler to design interact() to take a globals
parameter, same as eval does.


>
> On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
>> The next release of pydb will have the ability to go into ipython from
>> inside the debugger. Sort of like how in ruby-debug you can go into
>> irb :-)
>>
>> For ipython, this can be done pretty simply; there is an IPShellEmbed
>> method which returns something you can call. But how could one do the
>> same for the stock python interactive shell?
>>
>> To take this out of the realm of debugging. What you want to do is to
>> write a python program that goes into the python interactive shell -
>> without having to write your own a read/eval loop and deal with
>> readline, continuation lines, etc.
>>
>> The solution should also allow
>>  - variables/methods in the calling PYthon program to be visible
>>    in the shell
>>  - variables set in the interactive (sub) shell should persist after the shell
>>    terminates, although this is a weaker requirement. POSIX subshells
>>    for example *don't* work this way.
>>
>> There has been much written about how to embed Python from C, so I
>> suppose this may offer one way. And at worst, I could write
>> a C extension which follows how C Python does this for itself.
>>
>> But is there a simpler way?
>>
>> Thanks.


From paul at boddie.org.uk  Wed May 21 10:23:04 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 21 May 2008 07:23:04 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
Message-ID: <d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>

On 21 Mai, 15:22, giraffe... at gmail.com wrote:
>
> I did and I confirmed this by modifying the data, selecting it from
> the mysql command line client to verify the changes, then running the
> report again. If I exit the application and then start it again,
> everything works as expected until the second instance of the report
> is run.

Note that if you have a connection open in your program, especially if
that connection has already been used to select data, it may be the
case that you then have to perform a rollback or commit before
attempting to access newly added data. The reason for this behaviour
is that the DB-API modules will have begun a transaction on your
behalf, and while that transaction is open, changes committed in other
transactions may be unavailable to your own transaction, depending on
the transaction isolation level.

MySQL appears to use "repeatable read" by default [1] as its
transaction isolation level, whereas PostgreSQL (for example) uses
"read committed" by default [2]. I would guess that if you were using
PostgreSQL, this particular problem would not have occurred, but there
are other reasons to be aware of the effects of long duration
transactions in PostgreSQL, and the practice of periodically
performing a rollback would still be worth considering with that
database system.

Paul

[1] http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction-isolation.html
[2] http://www.postgresql.org/docs/8.1/interactive/transaction-iso.html


From wizzardx at gmail.com  Tue May  6 09:27:54 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 15:27:54 +0200
Subject: How do you debug memory usage?
Message-ID: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>

Hi list.

I've tried Googling for this and I checked the Python docs, but to no avail.

What is the best way to debug memory usage in a Python script?

I'd like to see what objects are using the most memory. Ideally this
would be aware of references too. So if I have a small list that
contains (references rather) some large variables, then I could see
that the global list variable was responsible for X MB that couldn't
be collected by the garbage collector.

It would be nice if it could be used in a similar way to the 'du'
Linux command. eg:

eg output:

>>> mem_debugger.pretty_print()
A (type: list): 8 bytes, 10MB
  - a (type: string): 6 MB, 0 bytes
  - b (type: string): 4 MB, 0 bytes
B (type: dict): 8 bytes, 5 MB
  - d (type: string): 3 MB, 0 bytes
  - c (type: string): 2 MB, 0 bytes

In the output above, the 1st size is the memory used by the object
itself, and the 2nd size is the memory used by objects it refers to. A
& B are global vars (a string and a dict), a,b,c, and d are strings
that were added to A & B at some point in the past, and aren't refered
to by anything else. Also, the output is in descending order of size.

Are there any tools/modules/etc I can use like this?

David.


From arnodel at googlemail.com  Tue May  6 11:37:22 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:37:22 +0100
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>
	<6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>
Message-ID: <m24p9b78b1.fsf@googlemail.com>

Aaron Watters <aaron.watters at gmail.com> writes:

> I'm having trouble following your discussion
> and I suspect you might be a friend of Mark V Cheney.
> But I will focus on this one point.
>
> On May 5, 11:14 pm, castiro... at gmail.com wrote:
>> If recursive generators are really useless (erect wall might not be),
>
> I would like to have recursive generators --
> for example to be able to traverse a tree
> and yield the value at every node.  Right now
> to do this you need to build a chain of generators
> from each leaf to the root of the tree (or avoid
> recursion by managing your own stack of nodes).
> Every yield must "bubble up the tree".

There is a patch that allows them:

    http://bugs.python.org/issue2292

But I don't know how it is implemented (i.e. does the 'bubbling up'
behaviour still happen behind the scene?).

Else you could use a trampoline, as I've done here:

    http://www.marooned.org.uk/~arno/python/cogenerator.html

(Scroll down to 'Flattening nested cogenerators' and 'recursive
cogenerators' - I had fun doing it but it is terribly inefficient).

-- 
Arnaud


From ptmcg at austin.rr.com  Mon May 19 09:01:19 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:01:19 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <2196ab0c-93f4-4dba-807f-32f2a9391826@m36g2000hse.googlegroups.com>

On May 19, 4:54?am, kuratk... at kuratkull.com wrote:
> Hello,
>
> ***************
> import urllib2
> import re
> import string
> import sys
>
> url = "http://www.macgyver.com/"
> request = urllib2.Request(url)
> opener = urllib2.build_opener()
> html = opener.open(request).read()
>
> match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
>
> out = match.findall(html)
>
> print out
> **************
>
> I would like to print out string with formatting, but as I read, the
> string is made into a raw string when using re.
> How could I disable or bypass this?
>
> I googled for an hour and couldn't find a solution.
>
> Thank you in advance.

Change your print statement to:

print out[0]

-- Paul


From inhahe at gmail.com  Fri May 23 07:14:08 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 07:14:08 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<69n3poF33hfhfU1@mid.uni-berlin.de>
Message-ID: <DExZj.2777$772.804@bignews2.bellsouth.net>

>
>> To be more specific, let's say I want to create a simple, 2D strategy
>> game. It will have a board layout like chess or checkers and the player
>> will move around the board. Let's say this is all I know, and perhaps I
>> don't even know *this* for sure either. Is it possible to write the
>> logic for such a game at this point?
>
> Maybe even this is possible.  But here you are not only drawing the line
> between GUI and logic but also within the logic part itself because the
> board layout isn't (just) a GUI issue.  If you have checkers, hexagons, or
> other shapes also has influence on the logic part, because you need
> slightly different algorithms for finding ways from tile `A` to tile `B`,
> or to decide when a piece is blocked by others, and how the rules to move
> pieces around look like.  Just imagine how to modify chess rules to a
> board with hexagonal patterns.  It would severely change the logic part.

<purelyacademic>If the GUI defines that it's a board layout like chess or 
checkers and the player will move around the board, it's hard to say what's 
left for the "logic" part to do.  I can't think of any generalization for 
the fact that it's a 2D strategy game.  You could have a 2-dimensional 
array, the size of which is determined by the GUI, but even motion on it 
would have to be defined by the GUI, in which case the GUI would simply be 
using the "logic" part for storing the array and accessing it via index 
values.  And then there's no reason not to put the array inside the GUI. 
Although it would help if only your "logic" part could provide persistence. 
Also, the "logic" part could provide many useful functions that games are 
likely to use, but then it's more like a library than anything else. 
Secondly, it's unclear whether the fact that it's a 2D strategy game was 
included in what he might not know, and in that possible case, strictly 
speaking, he didn't define anything that the logic part *does* know, and it 
being an example, one could theorize that that logically implies the "logic" 
part of the program is null.

>
>> Another example could be printing messages to the player. If I need to
>> say "You killed the monster!", is there a general way to write this, or
>> do I need to specifically refer to GUI widgets and methods, etc. in
>> order for it to be displayed properly?
>
> The observer pattern can be used here.  The GUI has to register a callback
> function with your logic engine and every time you want to inform the
> player about something, your game logic calls that function with the
> message.  It doesn't have to know if it will be rendered as graphic on
> screen, displayed as text in a terminal, or synthesized as sexy female
> computer voice.

If the function name to register the callback function is hard-coded into 
the logic part and into the GUI, then so can the name of the callback 
function itself be, so that it doesn't need to be a callback, barring only 
the possibility of the callback function being changed from one instance to 
the next by the particular GUI, and even that can be done without a callback 
simply by reassigning the name, or in C++ you could cast a pointer to 
function within the hard-coded function and call it and and change that 
pointer when desired.

Not that I know anything about MVC.</purelyacademic>







From Tymoteusz.Jankowski at gmail.com  Sun May 11 02:58:49 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Sat, 10 May 2008 23:58:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>

On May 11, 4:19?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

The range() function returns a list and list is a sequence, isn't?



From mal at egenix.com  Sun May 18 08:31:31 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Sun, 18 May 2008 14:31:31 +0200
Subject: multiple databases, what's the best interface ?
In-Reply-To: <482F29DF.2040804@gmail.com>
References: <482F29DF.2040804@gmail.com>
Message-ID: <483021A3.9060908@egenix.com>

On 2008-05-17 20:54, Stef Mientki wrote:
> hello,
> 
> I need to switch fluently between 2 or 3 types of dbases:
> SQLite, Sybase ( and in the future MS SQL-server).
> 
> I need both closed application and general purpose database manager,
> which should run on different platforms (windows, windows mobile, not 
> web based).
> 
> I would like to write the applications in Python.
> What's the best interface so I can use the same program for all databases,
> and just have to change the database name, if I want to use another 
> database ?

If you need a common interface on all the platforms, then I'd suggest
you have a look at our mxODBC:

http://www.egenix.com/products/python/mxODBC/

If you also need to support Windows Mobile, then you'll be interested
in our upcoming new product called "mxODBC Connect" which separates
the client from the server.

mxODBC Connect allows using the mxODBC API on platforms which don't
come with ODBC drivers or where getting ODBC drivers is difficult.
Due to it's client-server approach it also simplifies configuration
a lot.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 18 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From mccredie at gmail.com  Mon May  5 19:16:15 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 5 May 2008 16:16:15 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>

On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
> Hi,
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
>
> import conf
> print conf.SomeVariable
>
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.
>
> I want to store this data in some conf file (txt) and would like to
> use it same way as I am using these variables as defined in py
> files.
>
> one solution I can think of is writing data as a dictionary into conf
> file. and then by reading data, apply eval on that data. and update
> local dict? but this is not a good solution....
>
> any pointers?
>
> Sandip

I would load the configuration file using `imp.load_source'. This
allows you to load the config file by filename, and gets away from the
issue of accidentally importing a file somewhere else in pythons
search path. Also, calling imp.load_source will reload the module when
called a second time.

http://docs.python.org/lib/module-imp.html

[conf.py]
a = 1
b = 2
class c:
    a = "hello"
    b = "world"
[/end conf.py]

>>> conf = imp.load_source("conf", "./conf.py")
>>> conf.a
1
>>> conf.b
2
>>> conf.c.a
'hello'
>>> conf.c.b
'world'



There are so many ways potential solutions to your problem that,
without any more details, it is hard to suggest anything.

Here are some potential solutions:

ConfigParser - module for handling ini files
xml - several built-in modules for handling XML files
sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
for config data)
windows registry  - _winreg module
pickle - serialize python objects
marshal - similar to pickle, only works for simple objects

Those are just the built-in solutions. If you wanna look at 3rd party
solutions, prepare for overload. The number of alternative INI parsers
alone is staggering.

Also, there are many ways to organize your data and use a solution
similar to what you are already using.

I guess what I'm trying to say is... don't roll your own, it would be
a waste of time, this problem has been solved 100s of times. That is,
unless you want to do it for fun.

Matt


From iapain at gmail.com  Fri May 30 03:13:37 2008
From: iapain at gmail.com (iapain)
Date: Fri, 30 May 2008 00:13:37 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <20638c80-c869-4fc0-b60d-34aa5c93daa9@m45g2000hsb.googlegroups.com>

On May 29, 11:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.
>
> Thanks,
> Nikhil

If you just want to check required value then you can even use Sets or
build your own hash table.


From pavlovevidence at gmail.com  Fri May 23 04:31:10 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 01:31:10 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>

On May 23, 3:50 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Brad a ?crit :
>
> > cm_gui wrote:
> >> Python is slow.
>
> > It ain't C++, but it ain't a punch card either... somewhere in between.
> > I find it suitable for lots of stuff. I use C++ when performance really
> > matters tho... right tool for the job. Learn a good interpreted language
> > (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.
>
> 2/ actually, all known Python implementations compile to byte-code.
>
> > and you'll be just
> > fine. Until then, quit bitching.

You know, even though you're technically correct, I'd like to see you
abandon this little crusade.  At this point it's more noisy than
helpful.

Like it or not, to most of the world, "interpreted" vs. "compiled" is
a vague pragmatic distinction between fast machine-coded languages and
not-so-fast non-machine-coded languages.  And like it or not, the
world rarely cares to make the distinction between language and
implementation, and frankly, it's usually not necessary to.

What Brad said is perfectly acceptable, and good advice IMHO, under
the common usage of the terms.  I really don't see much reason to call
someone out on it unless they're being deliberately misleading.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Thu May 15 19:18:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 20:18:11 -0300
Subject: basic comparing files
References: <aa405c1f0805150202w3f1dc823wf363512f276f7e93@mail.gmail.com>
Message-ID: <op.ua7xolv9x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 06:02:29 -0300, Beema shafreen  
<beema.shafreen at gmail.com> escribi?:

> I am comparing two files A and B
> which has three columns a1, b1 of A and a2, b2

*three* columns? You menction only two of them.

> say for example if need to compare a1 with a2 and if there are common i  
> have
> display a1, b1, b2
> or else i have to display a1 , b1 or a1, b2

Do you have to syncrhonize both listings? That is, search for matches that  
are not in the same line? Or just compare line by line?
In the first case, the difflib module may help:  
http://docs.python.org/lib/module-difflib.html
In the second case, just iterate over both files, compare lines and  
display one thing or another.

> is the set function going to be the best option or is there any other way

Probably the set type won't be useful - a concrete example of what you  
want would help to provide better ideas.

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Tue May 13 02:56:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 03:56:10 -0300
Subject: Inconsistency in retrieving exceptions via sys module
References: <482874B1.4010504@rice.edu>
Message-ID: <op.ua2yvwy3x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 May 2008 13:47:45 -0300, Raj Bandyopadhyay <rajb at rice.edu>  
escribi?:

> I am writing some C code which sets and retrieves a Python exception. I
> set the exception using PyErr_SetString(), and retrieve it in 2 ways: 1)
> using PyErr_Occurred() and 2) Using sys.exc_type. However, I get two
> different results and am very puzzled by this apparent inconsistency.
> Could anyone please clarify what I'm missing? I need both to work
> consistently for my application.

The sys.exc_* variables are just for backwards compatibility, don't use  
them; use sys.exc_info() in Python code and PyErr_Occurred (and the other  
PyErr... functions) in C. (Note that even PyErr_Occurred is not so common  
in C code, as most functions have some way to say "there was an error"; by  
example, functions that return a PyObject* mark an error returning NULL).

The sys.exc_* variables are set only at the end of each Python bytecode  
instruction (see ceval.c)

-- 
Gabriel Genellina



From nc at iname.com  Sun May 25 16:28:25 2008
From: nc at iname.com (NC)
Date: Sun, 25 May 2008 13:28:25 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
Message-ID: <d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>

On May 25, 11:46 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
>
> If the OP wants to learn the guts of the blog or to implement
> the blog from scratch, Python/Django would be a better choice
> than PHP. The reason is that he can reuse and customize existing
> high quality components for all these auth/auth, admin, comments,
> etc, etc, etc.

You are comparing apples to oranges...  There are application
frameworks
for PHP as well (CakePHP and Symfony come to mind).  CakePHP, if
memory
serves, actually has a development of a blog described in its
tutorial...

> Another reason is that Python and Django encourage very clean design
> while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
> PHP wrapped in spaghetti HTML".

It's absolutely the same thing with PHP frameworks...

> 2 man/year in PHP == 2 man/week in Python/Django.

This, I daresay, is an exaggeration...  Let's take your own example:

> And there are Python/Django blog applications that already do almost
> everything (and maybe more) that WordPress does.http://byteflow.su/
> is one of them (IMHO the most promising).

A quick look at the revision log:

http://byteflow.su/log/

reveals that the initial commit of 60 or so files has been done on
08/14/07
(10 months ago), a second developer came on board 12/01/07 (seven+
months ago),
a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
(also
six+ months ago).  There are at least nine discernible contributors
overall.
Say what you will, but it still looks an awful lot like like two man-
years,
Django or no Django...

Cheers,
NC


From bignose+hates-spam at benfinney.id.au  Fri May 16 04:57:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 16 May 2008 18:57:43 +1000
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <87fxsitym0.fsf@benfinney.id.au>

"??" <littlesweetmelon at gmail.com> writes:

> Howdy,
>     I wonder why below does not work.
> 
> a = object()
> a.b = 1        # dynamic bind attribute failed...
> 
> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK

It's annoyingly difficult to search for information on this; "python
class object type inherit bind attribute" aren't sufficiently
distinguishing to know that we're talking about the built-in 'object'
type, and inheriting from it.

I'm interested to know the answer to your question; thanks for asking it.

-- 
 \     "Don't be afraid of missing opportunities. Behind every failure |
  `\      is an opportunity somebody wishes they had missed."  -- Jane |
_o__)                                          Wagner, via Lily Tomlin |
Ben Finney


From danikar at gmail.com  Sun May  4 06:01:37 2008
From: danikar at gmail.com (danikar at gmail.com)
Date: Sun, 4 May 2008 03:01:37 -0700 (PDT)
Subject: Open a file within an ISO in python.
Message-ID: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>

Is there a way to open a file that is inside of an ISO in python?

Say I have an ISO file, danikars.iso and on the iso there is a file
called information.txt

I want to be able to do something like this.

[code]
iso_h = openiso("danikars.iso")
file_h = iso_h.extract("information.txt")
contents = file_h.read()
[/code]

Is there anything that will give me that functionality? Or close?

Thanks,

Danikar


From frikker at gmail.com  Mon May 19 16:02:24 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 13:02:24 -0700 (PDT)
Subject: MDP: A Simple Feed Forward Network
Message-ID: <6e5511c0-efad-47f5-a5e2-417e9c709bf1@26g2000hsk.googlegroups.com>

Hey everyone,
  I was hoping to see some people out on the python list that are
familiar with MDP (Modular Toolkit for Data Processing -
http://mdp-toolkit.sourceforge.net/)?

  I am wanting to develop a very simple feed forward network.  This
network would consist of a few input neurons, some hidden neurons, and
a few output neurons.  There is no learning involved.  This network is
being used as a gene selection network in a genetic simulator where we
are evolving the weights and connectivity.

  There are many different types of nodes listed as being supported,
but i can't figure out the best one to use for this case.  In this
situation, we only want to iterate through the network X times.  (In
the simples version, with no cycles, this would mean that once the
output nodes are calculated there would be no additional calculations
since the system would be stable and non-learning).  Node types are
listed at the bottom here: http://mdp-toolkit.sourceforge.net/tutorial.html#quick-start

  In the more complex version, we would have the same model but
instead of having straight connectivity all the way through, we would
add a few cycles in the hidden layer so that a few neurons would feed
back into themselves on the next time step.  This could also be
connected to a 'selector' layer, that feeds back on the hidden layer
as well.  Since we are only running this a finite number of times, the
system would not spiral out into instability.

  Any suggestions for which node types to use, or possibly what other
libraries would be helpful? I realize that due to the relative
simplicity of this network I could hand code this from scratch.  MDP
just looks extremely handy and efficient and I'd like to use it if
possible.

Simple Network:

(H is interconnected fully with the Input and Output layer)
I -> H -> O
I -> H -> O
I -> H -> O

Cycled Network (Trying to show that the first hidden neuron is
connected back to itself)
     v---|
I -> H -> O
I -> H -> O
I -> H -> O

Complex Network (Trying to show that the first hidden neuron is
connected to another hidden neuron S that connects back to the input
of H.  S would be interconnected with the other hidden neurons as
well)
         v--- S <--|
I ->    H         -> O
I ->    H         -> O
I ->    H         -> O

Thanks!
-Blaine


From http  Mon May 19 19:07:06 2008
From: http (Paul Rubin)
Date: 19 May 2008 16:07:06 -0700
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>
Message-ID: <7xtzgtyjtx.fsf@ruckus.brouhaha.com>

blaine <frikker at gmail.com> writes:
> How is it that you recommend killing a pure python thread? And also,
> when i use the 'threading' module am I creating a process, or a (gasp)
> thread?

A thread.

> (Is this an obvious question - and if so, how does one create
> a 'process'?)

os.fork()


From alokkat at gmail.com  Thu May 29 00:00:21 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Thu, 29 May 2008 00:00:21 -0400
Subject: Struct usages in Python
In-Reply-To: <m2bq2q48nu.fsf@googlemail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
Message-ID: <e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>

Thanks to everyone for your help.

I am able to use array of structure (here Event is a class) in the following
manner. But here I am fixing the array index as 4. Is there any easy way to
keep it appending dynamically.

self.event = [Event() for x in range(4)]  # Event is a class as posted in
original message.

I have one set of structures and want to process them, subsequently couple
of them will not be able to pass the criteria and all passed ones I wanted
to put in another list where I can dynamically append the structure. So that
I can post this list to server.

Thanks in advance.

Regards
Alok


On Wed, May 28, 2008 at 1:53 PM, Arnaud Delobelle <arnodel at googlemail.com>
wrote:

> Arnaud Delobelle <arnodel at googlemail.com> writes:
>
> > "Alex Gusarov" <alex.m.gusarov at gmail.com> writes:
> >
> >>>  class Event(object):
> >>>
> >>> Always subclass object, unless you have a very compelling reason not
> to,
> >>> or you are subclassing something else.
> >>>
> >>
> >> I've thought that if I write
> >>
> >> class Event:
> >>     pass
> >>
> >> , it'll be subclass of object too, I was wrong?
> >
> > You are wrong for Python 2.X, but right for Python 3 where old-style
> > classes are gone for good.
> >
> > What you define with the statement
> >
> >     class Event: pass
> >
> > is an 'old-style' class.  Witness:
> >
> >     >>> class Event: pass
> >     ...
> >     >>> class NewEvent(object): pass
> >     ...
> >     >>> type(Event)
> >     <type 'classobj'>
> >     >>> type(NewEvent)
> >     <type 'type'>
> >     >>> type(Event())
> >     <type 'instance'>
> >     del>>> type(NewEvent())
> >     <class '__main__.NewEvent'>
> >
> > All old-style classes are actually objects of type 'classobj' (they
> > all have the same type!), all their instances are all of type 'instance'.
>
> Oops somthing disappeared in the copy/paste process:
>
>    >>> class FooBar: pass
>    ...
>
> >     >>> type(FooBar) == type(Event)
> >     True
> >     >>> type(FooBar()) == type(Event())
> >     True
> >
> > Whereas instances of new-style classes are of type their class:
> >
> >     >>> class NewFooBar(object): pass
> >     ...
> >     >>> type(NewFooBar) == type(NewEvent)
> >     True
> >     >>> type(NewFooBar()) == type(NewEvent())
> >     False
> >
> > However, in python 2.X (X > 2?), you can force all classes to of a
> > certain type by setting the global variable '__metaclass__'. So:
> >
> >     >>> type(Event) # Event is an old-style class
> >     <type 'classobj'>
> >     >>> __metaclass__ = type
> >     >>> class Event: pass
> >     ...
> >     >>> type(Event) # Now Event is new-style!
> >     <type 'type'>
> >
> > HTH
> >
> > --
> > Arnaud
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From cokofreedom at gmail.com  Wed May 21 09:43:59 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 06:43:59 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
Message-ID: <07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>

>
> And wastes time. regular expressions can become expensive to match - doing
> it twice might be hurtful.
>
> Diez

match = (my_re1.match(line) or my_re2.match(line)) or
my_re3.match(line)

?


From malaclypse2 at gmail.com  Thu May 22 13:12:30 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 22 May 2008 13:12:30 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
References: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
Message-ID: <16651e80805221012k70ade323qb020f9765e2f4a3@mail.gmail.com>

On Thu, May 22, 2008 at 12:32 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?

I believe this is an issue with the precision of IEEE floating point
numbers[1].  Those are the types of numbers used by the hardware
floating point processor on your CPU.  I'm not an expert, by any
stretch of the imagination, but I believe you have two choices to
represent pi as an IEEE double precision float:

3.1415926535897931 (stored as 0x400921FB54442D18) or
3.1415926535897936 (stored as 0x400921FB54442D19)

1: http://en.wikipedia.org/wiki/IEEE_floating-point_standard

-- 
Jerry


From fuzzyman at gmail.com  Sun May 25 10:40:24 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 07:40:24 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com> 
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <8b1335c3-74d1-4ef5-b9c2-28d52837bf76@a70g2000hsh.googlegroups.com>

On May 25, 3:13?pm, Roy Smith <r... at panix.com> wrote:
> In article
> <f838bc64-a4ef-4770-b139-01284e0f8... at t54g2000hsg.googlegroups.com>,
> ?John Roth <johnro... at gmail.com> wrote:
>
> > I really don't care what the OP does in his own projects. My objection
> > is that, if it goes into the standard library, is that it passes a
> > signal that it's good practice to allow dependencies between tests. It
> > most definitely is _not_ good practice.
>
> The OP stated that he wants the tests run in a given order. ?People are
> assuming that's because he has dependencies between his tests. ?Maybe he
> just wants them run in order because it's easier to understand the output
> in a certain order.

No, we're pointing out that running tests in a specific order can
introduce hidden dependencies without you being aware of it. Whilst
this is already the case with unittest, further enshrining it in the
standard library is a bad idea.

As mentioned elsewhere, providing a better reporting mechanism is
probably the way to get better understandable output.

Micahel Foord
http://www.ironpythoninaction.com/

>
> For example, I'm currently working on some low-level data marshalling code
> (in another language). ?This is the sort of stuff which the Python struct
> module handles -- converting between internal form and network
> representation. ?
>
> There is a logical hierarchy of complexity. ?Handling characters is easier
> than handling ints, which is easier than floats, which is easier than
> doubles, and so on (arrays, sets and other composite types). ?If I was
> porting this to a new platform, I would want the unit tests to run in a
> logical order of simple to complex. ?If some assortment of tests failed,
> you want to start debugging the problem on the least complex data types. ?
> If the tests run in a specific order, it's easier to see where to start.
>
> It's not that any test depends on any other test to run, in the sense that
> there's some shared state between them. ?It's just that from a human
> factors point of view, there's a logical order to run them in.
>
> In fact, from a protocol point of view, some of the types really do depend
> on each other. ?We send counted strings, for example, so we can't send a
> string until we know how to send an int (for the string length). ?If the
> first test that fails is the string test, I know right off that the problem
> is not in how we send ints, because that test ran already and it passed.
>
> Earlier, I gave another example of wanting tests to be run in the same
> order as some externally controlled set of functional requirements. ?Again,
> not because the tests have inter-dependencies, but because it just makes it
> easier to interpret the results.
>
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the
> only reason you want to run tests in a specific order.



From castironpi at gmail.com  Thu May 15 07:50:20 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 15 May 2008 04:50:20 -0700 (PDT)
Subject: Greetings
Message-ID: <31e4b80a-4694-4d6e-bf04-a2031cf9472c@m3g2000hsc.googlegroups.com>

Hail, Earthlings,

I have an easy request to take over the newsgroup ("Taking Over the
Newsgroup", "TOTN").  May I?

Pros:
  Lifetime benefits
  Google product
  Talking
Cons:
  World domination
  No crossing
  Social aspect*

Read the fine print:

*Social: Subscribers to TOTN may come talking, telling jokes, and
laughing loudly.  Neighbors subject to smiling.  Vikings prone to
capitalize.

Settings include autovoltic, board, and charm.  Dimensions include 4.
Restrictions apply.  States may vary.  Void where prohibited.  People
include the living.  Times include eternity.  Toys include Legos.

Assume screen is two-dimensions and audio stereo; what are building
Legos?  Assume digital.


From sjmachin at lexicon.net  Thu May 22 18:37:23 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 22 May 2008 15:37:23 -0700 (PDT)
Subject: where is the Write method of ElementTree??
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
Message-ID: <0c26ec10-3492-4ce1-8b5a-ebfb747a9a8e@p39g2000prm.googlegroups.com>

On May 23, 6:56 am, gray.bow... at gmail.com wrote:
> I'm messing around with trying to write an xml file using
> xml.etree.ElementTree.  All the examples on the internet show the use
> of ElementTree.write(), although when I try to use it it's not
> available, gives me ...
>
>    ElementTree(sectionElement).write("section.xml")
> TypeError: 'module' object is not callable
>
> I'm new to python, so I think I'm doing something wrong.. any
> thoughts?
>
> Thanks.'
>
> See code below:
>
> # Create xml structure
> sectionElement = ElementTree.Element("section")
>
> # step through feed result and create elements for each article -
> result[article]
> for article in feedResult:
>     articleElement = ElementTree.Element("article")
>
>     titleElement = ElementTree.SubElement(articleElement, "title")
>     titleElement.text = article['title']
>
>     bodyElement = ElementTree.SubElement(articleElement, "body")
>     bodyElement.text = article['body']
>
>     sectionElement.append(articleElement)
>
> #print ElementTree.tostring(sectionElement)
> ElementTree(sectionElement).write("section.xml")

It's complaining about
    ElementTree(whatever)
As it says, you are trying to call a module.

Looks like you need:
    sectionElement.write("section.xml")

HTH,
John


From johnroth1 at gmail.com  Mon May 26 14:57:13 2008
From: johnroth1 at gmail.com (John Roth)
Date: Mon, 26 May 2008 11:57:13 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com> 
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <e592a7a4-651e-4d0d-929e-f65a9b2f75a0@26g2000hsk.googlegroups.com>

On May 25, 8:13 am, Roy Smith <r... at panix.com> wrote:
> In article
> <f838bc64-a4ef-4770-b139-01284e0f8... at t54g2000hsg.googlegroups.com>,
>  John Roth <johnro... at gmail.com> wrote:
>
> >
>
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the
> only reason you want to run tests in a specific order.

I'm not. As Michael Fnord and Diez Roggisch says in other responses,
there are other solutions to those problems. It would be better to
pursue them if you want a change to the standard library.

John Roth



From fivetwentysix at gmail.com  Sat May 31 00:55:38 2008
From: fivetwentysix at gmail.com (fivetwentysix at gmail.com)
Date: Fri, 30 May 2008 21:55:38 -0700 (PDT)
Subject: compatability
References: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>
Message-ID: <793cc354-0251-4ea3-9ed9-5d873568e434@s33g2000pri.googlegroups.com>

On May 30, 8:32?pm, budcrandall at hotmail.com wrote:
> I'm currently using 3ds Max Design 2009 and Maya. Will Python and
> Plone be compatible with my systems? I would really like to
> incorporate this software. Thank You Bud ? budcrandall at hotmail.com.

Please be more specific as to what type of system...
Python is supported on almost all platforms: Unix, Mac, Windows, etc.
Try visiting http://www.python.org/


From gandalf at shopzeus.com  Fri May  2 05:43:10 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 02 May 2008 11:43:10 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <WSwSj.236857$pM4.38686@pd7urf1no>
References: <WSwSj.236857$pM4.38686@pd7urf1no>
Message-ID: <481AE22E.3040906@shopzeus.com>

Yves Dorfsman wrote:
> I did a few tests with this script:
>
> class byebye:
>
>   def __del__(self):
>     print 'Bye, bye...'
>
>
> x = byebye()
>
>
> x.del() gets executed if:
> -I del x, then run gc.collect()
> -simply exit the script
> -get the script to abort on an exception
>
> But if I kill it with the default signal TERM, the script dies, but I 
> don't get the message, so I am assuming that python isn't taking the 
> time to cleanup, even though that is (was) what TERM was intended for.
TERM signal is unix specific. There is no special syntax/programming 
structure for signals inside the Python language, since it would be 
platform dependent. For simple client programs, usually it is not needed 
to setup signal handlers because they can easily be controlled in other 
ways.

For sensitive resources, instead of writing __del__ methods, you should 
create a "close()" method. Python does this with file objects, DB API 
2.0 with database connection objects etc. Then you can do

res = create_resource()
try:
    use_resource()
finally:
    res.close() # Must free resource, but the object can still be alive...

It is more common to use signals when you have more threads or child 
processes. You can use something like:

import threading
import signal

stop_requested = threading.Event()
exited_on_sigterm = False

def free_all_resources():
    pass # Free your resources here!

def sigterm_handler(signum, frame):
    """Stop the server gracefully when on SIGTERM."""
    global stop_requested
    global exited_on_sigterm
    exited_on_sigterm = True
    stop_requested.set()
    free_all_resources()

def main():
    global stop_requested
    global exited_on_sigterm

    logger = servicelog.getLogger('main',filename=LOGFILENAME)

    logger.info('Setting up the SIGTERM signal handler.')
    signal.signal(signal.SIGTERM, sigterm_handler) # Setup signal handler

    logger.info('Starting watchdog thread')
    watchdog = WatchDog()
    watchdog.start()

    worker1 = create_worker(stop_requested)
    worker2 = create_worker(stop_requested)
    # etc. Prepare things here...
   
    try:
        try:
            server = create_my_server()
            server.serve_until_not_stopped()              
        except Exception, e:
            logger.error(dumpexc(e))
            raise e
    finally:
        stop_requested.set()  # Ask other threads to stop cooperatively
      
        # Join all threads here
        watchdog.join()
        worker1.join()
        worder2.join()
        # etc. wait for all threads to exit cooperatively.
        if exited_on_sigterm:
            logger.warning('Exited on SIGTERM!')

Best,

   Laszlo



From ivan.illarionov at gmail.com  Fri May 16 22:46:11 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 02:46:11 +0000 (UTC)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <g0lgtj$2ine$2@news.mtu.ru>

On Fri, 16 May 2008 10:13:04 -0400, inhahe wrote:

> Can anyone give me pointers/instructions/a template for writing a Python
> extension in assembly (or better, HLA)?

Look up pygame sources. They have some hot inline MMX stuff.
I experimented with this rescently and I must admit that it's etremely 
hard to beat C compiler. My first asm code actually was slower than C, 
only after reading Intel docs, figuring out what makes 'movq' and 
'movntq' different I was able to write something that was several times 
faster than C.

D language inline asm and tools to make Python extensions look very 
promising although I haven't tried them yet.

-- Ivan


From arnodel at googlemail.com  Fri May 30 09:36:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 30 May 2008 14:36:06 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<mailman.1765.1212149786.12834.python-list@python.org>
Message-ID: <m2k5hbc3sp.fsf@googlemail.com>

"Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:

> On Thu, May 29, 2008 at 3:06 PM, Jason <tenax.raccoon at gmail.com> wrote:
>> I've got Python 3.0 alpha 2.  In this version, it looks like you can
>> define classes in either the old style or new style.  (I snipped the
>> top line a bit in the following example):
>
> Wrong. Py3k Classes are always new-style. They subclass object
> implicitly when no superclass is given.

I think he was talking about syntax, not object types.

-- 
Arnaud


From robert.kern at gmail.com  Tue May  6 18:27:26 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 06 May 2008 17:27:26 -0500
Subject: DISLIN Manual
In-Reply-To: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>
References: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>
Message-ID: <fvqm0f$67p$1@ger.gmane.org>

adolfo wrote:
> I am at the very beginning of the DISLIN 9.3 Manual:   1.4 Quickplots

I recommend asking the DISLIN author. I don't think that DISLIN is widely used 
in Python.

> Some quickplots are added to the DISLIN module which are collections
> of DISLIN routines for displaying data with one command. For example,
> the function ?plot? displays two-dimensional curves. Example:
> from Numeric import *
> from dislin import *
> x = arange (100, typecode=Float32)
> plot (x, sin (x/5))
> disfin ()
> 
> Problems:
> 
> 1. "from Numeric import * "  statement produced an error message, I
> had to replace it with "from numpy import *"

If DISLIN still uses Numeric rather than numpy, you will probably need to use 
Numeric, too.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From castironpi at gmail.com  Wed May 14 15:45:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 12:45:06 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com> 
	<a372359c-e323-4437-8e9a-0e4c52f81ded@d1g2000hsg.googlegroups.com>
Message-ID: <4fd64aae-d74b-412e-8acc-eee822ba8a47@t54g2000hsg.googlegroups.com>

On May 14, 1:04?pm, castiro... at gmail.com wrote:
> On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
>
> > >?Should tuples be named?
>
> > Yes.
>
> Not clearly should. ?Sequences ought be. ?If you're on the right time
> for both, can't the library hold the B?

On the web, you can.  Both data types can go in the docs... sorry for
the lunacy, I'm hacking.


From castironpi at gmail.com  Tue May 13 09:29:52 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:29:52 -0700 (PDT)
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
	<mailman.1039.1210675135.12834.python-list@python.org>
Message-ID: <bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>

On May 13, 5:38?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <st... at al.com.au> escribi?:
>
> > I have 2 classes in python, the first one runs first and and then the ?
> > first one calls the second class. I want it to run the second class as a ?
> > separate thread but I want the first one to wait until the second class ?
> > is dead.
> > Im having problem in both killing the second class when its done and ?
> > making the first class wait for it to finish.
> > Im very confused on doing threads in python.
>
> I'm confused trying to understand your requirements too. "run a class?"
> Threads execute code, it's easier to think of them as *functions* that are ?
> executed at the same time (or almost).
> So you have a function A that runs first, and creates a second thread that ?
> will execute function B. Then A will wait for B to finish. What do you ?
> want to do in A while it's waiting? Nothing? Then why to use a second ?
> thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt ?
> and others have specific ways to execute backgroung tasks while keeping ?
> the user interface responsive - you should tell us which one you're using ?
> in that case.
>
> --
> Gabriel Genellina

I don't mean to be impertinent, but are you making any cents with the
assignment?  Both free-ers and workers come in here.  I am a free-er
who has reason to doubt that money-driven programs get stuck at that
kind of ambiguity.  I hold that money keeps you out of that mess.

However, there are a number of things we can do to help, but as I, per
se, am only one person, I may not give you the best advice to start
with.  How do you find the 'threading.py' docs?


From bj_666 at gmx.net  Tue May 20 02:41:59 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:41:59 GMT
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <69fa5nF2uih6aU2@mid.uni-berlin.de>

On Mon, 19 May 2008 20:36:45 -0700, notnorwegian wrote:

> if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:

Since Python 2.5 there's `all()`:

In [81]: a, b, c, d = 5, 5, 5, 6

In [82]: all(x == 5 for x in (a, b, c))
Out[82]: True

In [83]: all(x == 5 for x in (a, b, c, d))
Out[83]: False

Ciao,
	Marc 'BlackJack' Rintsch


From fc14301589 at icqmail.com  Thu May 22 11:23:54 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 23:23:54 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
	<mailman.1466.1211443221.12834.python-list@python.org>
Message-ID: <48359018_2@news.tm.net.my>

On 22:32, mercoled? 21 maggio 2008 python at bdurham.com wrote:

>> appreciate somebody to join and put new views on this project
> 
> Send us a link to one of the sites with your code, eg.
> http://python.pastebin.com
 
Thank you!
Go to : http://it.geocities.com/call_me_not_now/index.html


From bronger at physik.rwth-aachen.de  Thu May 22 17:39:52 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 22 May 2008 23:39:52 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
	<8Ot*rIxds@news.chiark.greenend.org.uk>
Message-ID: <87abii2f2v.fsf@physik.rwth-aachen.de>

Hall?chen!

Matthew Woodcraft writes:

> [...]
>
> At one time, Guido was very keen on the idea of Python as a
> language to introduce non-programmers to (under the 'Computer
> Programming for Everybody' slogan).
>
> I think it's rather a shame that this has more-or-less fallen by
> the wayside. There are lots of people out there producing buggy
> spreadsheets to do things that would be easier to do in a
> programming language.

I don't think so.  It's still reasonably simple to write short
Python programs for e.g. the analysis of measurement results.  But
people simply don't trust cheap non-point'n'click programs which
don't occupy two shelves in the bookstore.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From maciej.blizinski at gmail.com  Tue May  6 04:01:28 2008
From: maciej.blizinski at gmail.com (=?ISO-8859-2?Q?Maciej_Blizi=F1ski?=)
Date: Tue, 6 May 2008 01:01:28 -0700 (PDT)
Subject: Python MIDI in 2008
Message-ID: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>

For the last couple of days, I've been looking for a Python midi
library. I'm generally interested in sending MIDI events via ALSA. It
seems like everything out there is pretty old; packages are from 2003
or 2005. Some packages don't seem to be really used, for instance
portmidi doesn't even support installing it system-wide; you can
compile it and... no make install for you.

What I've found so far:
- http://wiki.python.org/moin/PythonInMusic mostly point to non-
existing or very old software packages
- http://www.mxm.dk/products/public/pythonmidi/ -- no realtime support

Promising packages:
- http://trac2.assembla.com/pkaudio/browser/pyrtmidi -- something
realtime, but I couldn't get the actual Subversion repository address
- http://alumni.media.mit.edu/~harrison/code.html -- seems promising,
but I haven't got it running. You can't (system-wide) install
portmidi, and pyportmidi seems to want portmidi installed.

Is there any other package that allows sending MIDI events in real
time? Did anyone recently got any of the above packages to work?

Maciej


From arnodel at googlemail.com  Mon May 12 04:35:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:35:32 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
	<gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi> 
	<65d792a8-4469-404c-8287-1357170eea05@x35g2000hsb.googlegroups.com>
Message-ID: <08b7a27f-0e00-45cb-9c6c-e58cb7cac7d7@k37g2000hsf.googlegroups.com>

On May 12, 9:30?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
[...]
> # FizzBuzzer in action:
>
> >>> fizzbuzz = FizzBuzzer((3, 'Fizz'), (5, 'Buzz'))
> >>> for val in fizzbuzz[1:21]:
>
> ... ? ? print val
> ...
> 1 21 1
^^^^^^^^
Ignore this, it's debugging output

> 1
> 2
> Fizz
> 4
> Buzz
> Fizz
> 7
> 8
> Fizz
> Buzz
> 11
> Fizz
> 13
> 14
> FizzBuzz
> 16
> 17
> Fizz
> 19
> Buzz>>> abc = FizzBuzzer((2, 'Ah'), (3, 'Bee'), (5, 'Cee'))
> >>> list(abc[25:35])
>
> 25 35 1
^^^^^^^^^
Same

> ['Cee', 'Ah', 'Bee', 'Ah', 29, 'AhBeeCee', 31, 'Ah', 'Bee', 'Ah']

--
Arnaud



From gneuner2/ at /comcast.net  Sat May 10 21:01:21 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Sat, 10 May 2008 21:01:21 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<cMidnY3lU-7Lh7jVnZ2dnUVZ_qqgnZ2d@speakeasy.net>
Message-ID: <3jgc2498f1te1uqh7rrf3odhevkrt3s75e@4ax.com>

On Fri, 09 May 2008 22:45:26 -0500, rpw3 at rpw3.org (Rob Warnock) wrote:

>George Neuner <gneuner2/@/comcast.net> wrote:
>
>>On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
>><xahlee at gmail.com> wrote:
>
>>>? Functions [in Mathematica] that takes elements out of list
>>>are variously named First, Rest, Last, Extract, Part, Take, 
>>>Select, Cases, DeleteCases... as opposed to ?car?, ?cdr?, 
>>>?filter?, ?filter?, ?pop?, ?shift?, ?unshift?, in lisps and
>>>perl and other langs.
>
>>| Common Lisp doesn't have "filter".
>
>Of course it does! It just spells it REMOVE-IF-NOT!!  ;-}  ;-}

I know.  You snipped the text I replied to.  

Xah carelessly conflated functions snatched from various languages in
an attempt to make some point about intuitive naming.  If he objects
to naming a function "filter", you can just imagine what he'd have to
say about remove-if[-not].

George
--
for email reply remove "/" from address


From cokofreedom at gmail.com  Wed May 14 03:24:39 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 14 May 2008 00:24:39 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org> 
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
	<68vfm3F2v0piaU2@mid.uni-berlin.de>
Message-ID: <db85b45e-cfea-4850-941f-594feeeea3bd@m44g2000hsc.googlegroups.com>

On May 14, 8:37 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 13 May 2008 10:20:41 -0700, John Nagle wrote:
> > Matt Nordhoff wrote:
>
> >> Well, you should use "xrange(10)" instead of "range(10)".
>
> >    CPython really is naive.  That sort of thing should be a
> > compile-time optimization.
>
> It's not naive, it can't know at compile time what object is bound to the
> name `xrange` at runtime.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I think he meant you should just use xrange over range at all times.


From larry.bates at websafe.com`  Wed May 21 21:48:44 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Wed, 21 May 2008 20:48:44 -0500
Subject: php vs python
In-Reply-To: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <KfidnYdly6aMTKnVnZ2dnUVZ_qLinZ2d@comcast.com>

notbob wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so.  No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
> 
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever.  I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank.  Anyway, so I change over
> to learning php.  Then I run across that blog, Coding Horror, and start
> reading articles like this:
> 
> http://www.codinghorror.com/blog/archives/001119.html
> 
> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
> much.  I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp.  I've taken basic basic and basic
> C, but am barely literate in html.  Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.  
> 
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?
> 
> nb

Check out the Pylons blog tutorial.  You will have a simple blog up and running 
in less than 30 minutes and have a platform to extend it with as much 
functionality as you want later on.

Larry Bates

Pylons blog tutorial:

http://wiki.pylonshq.com/display/pylonscookbook/Making+a+Pylons+Blog


From cmpython at gmail.com  Fri May  2 15:53:31 2008
From: cmpython at gmail.com (CM)
Date: Fri, 2 May 2008 12:53:31 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.444.1209712086.12834.python-list@python.org>
	<4995d686-881d-4526-9095-3162cbfc4b49@z72g2000hsb.googlegroups.com>
Message-ID: <d90fcbd7-6664-4947-92d9-1f5624cb2e17@k13g2000hse.googlegroups.com>

On May 2, 10:18 am, "andrei.zavi... at gmail.com"
<andrei.zavi... at gmail.com> wrote:
> On May 2, 10:07 am, bvidinli <bvidi... at gmail.com> wrote:
>
>
>
> > i also asked same question in this list last week.
> > i foundhttp://www.cherrypy.org/tobe most suitable for me.
> > it is basic, easy, pure...
> > it contains its own webserver, very easy to start.
>
> > others have many framworks, structures, classes many many..
> > i wanted a pure web programming system , i found cherrypy.
>
> > see you.
>
> > 2008/5/2 jmDesktop <needin4mat... at gmail.com>:
>
> > > I have been to the main python site, but am still confused.  I have
> > >  been using .net, so it may be obvious how to do this to everyone
> > >  else.  I am aware there are various frameworks (Django, Pylons, etc.),
> > >  but I would like to know how to create web pages without these.  If I
> > >  have mod_python or fastcgi on apache, where do I start?  I don't have
> > >  clue where to begin to create a web page from scratch in python.  I am
> > >  sure I will want to access database, etc., all the "normal" stuff, I
> > >  just want to do it myself as opposed to the frameworks, for learning.
>
> > >  Thank you for any help.
> > >  --
> > >  http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > ?.Bahattin Vidinli
> > Elk-Elektronik M?h.
> > -------------------
> > iletisim bilgileri (Tercih sirasina gore):
> > skype: bvidinli (sesli gorusme icin,www.skype.com)
> > msn: bvidi... at iyibirisi.com
> > yahoo: bvidinli
>
> > +90.532.7990607
> > +90.505.5667711
>
> I agree. Try cherrypy. I was able to write simple issue tracking
> system for my project with basic web interface within 2 weeks.
> Prior to this I had no web development experience at all. It was
> really easy with cherrypy to start.


Really?  I tried CherryPy for a few minutes--totally 100% new to
web programming--and though I was pleased at the very basic "Hello,
World!" tutorial, I was unable to figure out how to use the more
advanced tutorials that come with the package.  Could you suggest
how one could learn?  I have experience with Python and GUI app
development, zero on web apps, but want to make widget-having web
apps which uses Python as the logic.

Any tips would be appreciated!

Also, beyond just running a small test web app with the "server"
running on my own computer, what is a basic way to try it out
actually on the web?  Thanks!


From paul.hankin at gmail.com  Sat May 17 06:29:16 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Sat, 17 May 2008 03:29:16 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<g0mab2$pkt$1@aioe.org>
Message-ID: <51336537-0374-470a-a243-c6aa01e1fe9a@59g2000hsb.googlegroups.com>

On May 17, 11:08?am, Ruediger <larud... at freenet.de> wrote:
> urikaluzhny wrote:
> > It seems that I rather frequently need a list or iterator of the form
> > [x for x in <> while <>]
> > And there is no one like this.
> > May be there is another short way to write it (not as a loop). Is
> > there?
> > Thanks
>
> I usually have the same problem and i came up with an solution like that:
>
> from operator import ne
> def test(iterable, value, op=ne):
> ? ? _n = iter(iterable).next
> ? ? while True:
> ? ? ? ? _x = _n()
> ? ? ? ? if op(_x, value):
> ? ? ? ? ? ? yield _x
> ? ? ? ? else:
> ? ? ? ? ? ? raise StopIteration

This is better written using takewhile...
itertools.takewhile(lambda x: x != value, iterable)

But if you really need to reinvent the wheel, perhaps this is simpler?

def test(iterable, value, op=operator.ne):
    for x in iterable:
        if not op(x, value):
            return
        yield x

--
Paul Hankin


From clyfish at gmail.com  Tue May  6 05:19:17 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Tue, 6 May 2008 02:19:17 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
Message-ID: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>

In cmd, I can use find like this.

C:\>netstat -an | find "445"
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  UDP    0.0.0.0:445            *:*

C:\>

And os.system is OK.
>>> import os
>>> os.system('netstat -an | find "445"')
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  UDP    0.0.0.0:445            *:*
0
>>>

But I don't know how to use subprocess.Popen to do this.

from subprocess import Popen, PIPE

p1 = Popen(['netstat', '-an'], stdout = PIPE)
p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
print p2.stdout.read()

It doesn't work.
Because subprocess.Popen execute "find" like this.

C:\>find \"445\"
???? - \

C:\>

It adds a '\' before each '"'.
How to remove the '\'?
Thank you.


From kamhung.soh at gmail.com  Sun May 18 21:52:57 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Mon, 19 May 2008 11:52:57 +1000
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <op.ubdoujwuev04yd@melwxp23>

On Mon, 19 May 2008 08:20:22 +1000, John Salerno  
<johnjsal at NOSPAMgmail.com> wrote:

> Hey all. Just thought I'd ask a general question for my own interest.  
> Every time I think of something I might do in Python, it usually  
> involves creating a GUI interface, so I was wondering what kind of work  
> you all do with Python that does *not* involve any GUI work. This could  
> be any little scripts you write for your own benefit, or what you do at  
> work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

- Enhancing existing products by scripting new features.
- Interface between databases, Excel and text files.
- Convert data between flat files and XML.
- Manage files for build processes.
- Automating processes (e.g. checkout, builds, FTP).

Wish I had some reasons to make a GUI application in Python.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From wuwei23 at gmail.com  Tue May 13 07:13:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 04:13:01 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
Message-ID: <0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>

On May 13, 8:18 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> May I ask *where* did you read that crazy idea?

Grant Edwards outlines his past behaviour here:
http://groups.google.com/group/comp.lang.python/msg/27553bd56827dc0f

Given that all nine of his postings have inflammatory topics, he's
beginning to sound like a troll.


From bbxx789_05ss at yahoo.com  Sun May 11 16:01:21 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:01:21 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <eb73ea38-9c7b-4e0f-99ca-e6b796004c1b@m36g2000hse.googlegroups.com>

On May 11, 1:28?pm, bc90021 <pyt... at bc90021.net> wrote:
> > ...and the exact error message was?
>
> > Here is a tip: if you want people to help you, then you have to help
> > them to help you. ?Personally, I wouldn't respond to anymore of your
> > questions because you seem incapable of posting the information that was
> > requested.
>
> So far, the people who have answered this post have gone on the
> assumption that I'm stupid. ?I'm not. ?I took perfectly working code,
> cut it from one class, and put it in another. ?It stopped working in the
> second class. ?I've spent days on this and trust me, given what I've
> experienced of the Python community so far, if I didn't have to ask, I
> wouldn't.
>
> (I really must say that so far the help I am getting in the Python
> community is a big let down. ?Whether it's on IRC or here, everyone has
> an arrogance that I don't find anywhere else in the open source
> community, and it seriously makes me question the choice of language that
> I've made.)
>
> The error message was at the top of the thread (am I incapable of posting
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

Well, it appears to me that this error message is different than the
one in your first post.  But maybe I'm on LSD right now and things
will be appear differently tomorrow.

In addition, I've never seen a python error message that doesn't
include the traceback, which you were asked to post, but apparently
are still incapbable of doing.  Also, any line numbers in the error
message should be marked in your code with comments.  That will help
other people help you, remember?





From exarkun at divmod.com  Mon May  5 08:18:35 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 08:18:35 -0400
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <20080505121835.6859.754335118.divmod.quotient.59009@ohm>

On Mon, 5 May 2008 04:57:25 -0700 (PDT), globalrev <skanemupp at yahoo.se> wrote:
>class Foo(object):
>	def Hello(self):
>		print "hi"
>
>object is purple, ie some sort of reserved word.

What your text editor of choice does with syntax coloring is its own business.
It doesn't really have anything to do with the language, except inasmuch as one
might hope that it is *somehow* based on it.

>why is self in black(ie a normal word) when it has special powers.
>replacing it with sel for example will cause an error when calling
>Hello.

Not true.

    exarkun at charm:~$ python -c '
    > class Foo(object):
    >     def Hello(monkeys):
    >         print "hi"
    >
    > Foo().Hello()
    > '
    hi
    exarkun at charm:~$

`self? as the name of the first parameter to an instance method is
convention; beyond that, it has no special meaning in the language.

`object?, on the other hand, is a builtin name which refers to a
particular object.

Jean-Paul


From thomas.troeger.ext at siemens.com  Tue May 20 05:50:22 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 11:50:22 +0200
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <g0u6sv$u68$1@aioe.org>

Paul Rubin wrote:
> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"

[...]

> 
> Thanks.

I think your idea is good, maybe you'd want to build an LZ78 encoder in 
Python (LZ78 is pretty easy), feed it with a long English text and then 
pickle the resulting object. You could then unpickle it on program start 
and encode your short strings with it. I bet there's a working 
implementation around that already that does it ... but if you can't 
find any, LZ78 is implemented in 1 or 2 hours. There was a rather good 
explanation of the algorithm in German, unfortunately it's vanished from 
the net recently (I have a backup if you're interested).

Cheers,
Thomas.


From siva.webhosting at gmail.com  Tue May 27 21:18:39 2008
From: siva.webhosting at gmail.com (siva)
Date: Tue, 27 May 2008 18:18:39 -0700 (PDT)
Subject: More than 500 Free webhostings
Message-ID: <b2da17bb-73ab-46f6-a8ea-c5064fd0eda5@w5g2000prd.googlegroups.com>

Hi Friends

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websites

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From castironpi at gmail.com  Thu May 15 20:16:57 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 17:16:57 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com> 
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>
Message-ID: <a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>

On May 15, 6:43?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
> > <bruno.desthuilli... at gmail.com> wrote:
> > > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > > Why can't I write this?
> > > > > > --
>
> > > > > Because your antecedent is undefined?
>
> > > > Of the two ways to play, just to say #define this per se would be a
> > > > bad move, but that's one that comes from the wrong group. ?#define is
> > > > a big scary macro, that python hasn't been using; it's the one-line
> > > > typo. ?Instance:
>
> > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > > Use it to render planes in solids.
>
> > > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > > definitively.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Definitely. ?But, due, I forgot to complete an example.
>
> > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > in C. ?Python:
>
> > life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> > exec( life1 )
>
> > Where does it go?- Hide quoted text -
>
> > - Show quoted text -
>
> I'm supposed to talk about an entropy pool game. ?You can tunnel.- Hide quoted text -
>
> - Show quoted text -

If I had a send-parachute, would all you need be yield?  Let's drop
graphics.


From russblau at hotmail.com  Fri May  9 06:11:24 2008
From: russblau at hotmail.com (Russell Blau)
Date: Fri, 9 May 2008 06:11:24 -0400
Subject: Reusing IDLE file editor
Message-ID: <BAY125-W3100C9BEA05C8054883EE7D2D30@phx.gbl>

I have a need for some simple text-editing capabilities in a Tkinter program, and it occurred to me that IDLE is a Tkinter app that already has what I need in its file editor windows.  I thought it would be nice if I could just use one of those windows as a widget in my application, in place of a plain Tkinter Text widget. I took a quick look at idlelib/EditorWindow.pyw, but it appears that the program is not written as a reusable widget; it's hard-coded to be a toplevel window.

Before I start hacking at it myself, has anyone else modified IDLE to be able to reuse its windows in another application?  Or, alternatively, is there another freely-available (under the Python license or something compatible) Tkinter widget out there that has similar text-editing capabilities?


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From dickinsm at gmail.com  Thu May 22 13:32:17 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 10:32:17 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <3026ddb4-1e9f-488c-a1dc-fe43020d72c7@k37g2000hsf.googlegroups.com>

On May 22, 12:32?pm, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>

There are two effects here:

(1) pi isn't exactly representable as a floating-point number,
so math.pi is merely an approximation to it, and

(2) the value 3.1415926535897931 that you see when you print
pi is itself an approximation to the actual value of math.pi.
math.pi is exactly equal to 884279719003555/281474976710656,
which is the closest C double to the actual value of pi.

The problem in (2) occurs because floating-point numbers
are stored in binary, but printed in decimal.

Mark


From kamhung.soh at gmail.com  Thu May 29 22:12:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 30 May 2008 12:12:36 +1000
Subject: Finding file details...
In-Reply-To: <g1mir9$uvo$1@ger.gmane.org>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<g1mir9$uvo$1@ger.gmane.org>
Message-ID: <g1nnqm$rj3$1@ger.gmane.org>

Roger Upole wrote:
> Kalibr wrote:
>> I've been trying to figure out how to find the details of files
>> (specifically music for now) for a little sorting script I'm making,
>> My aim is to get details on the artist, album, and genre for mp3 and
>> wma files (possibly more in the future). My closest match was when I
>> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
>> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
>> to help (and most of it went over my head). Is there any module I can
>> use to find this sort of data? I'm trying to not make it specialised
>> in music, because I may want to extend this to picture, movie, text
>> etc. files in the future. Any ideas how I could go about this?

I think GetFileVersionInfo() only provides version information for DLL 
and EXE files.

See: http://msdn.microsoft.com/en-us/library/ms646981.aspx

> 
> You can use the shell COM objects to access media properties
> as shown by Explorer.
> 
> import win32com.client
> sh=win32com.client.Dispatch('Shell.Application')
> 
> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> ns=sh.NameSpace(folder)
> 
> ## the column index for Artist may vary from folder to folder
> for c in range(0,255):
>     colname=ns.GetDetailsOf(None, c)
>     if colname=='Artists':  ## This shows up as just Artist on XP
>         for i in ns.Items():
>             artist=ns.GetDetailsOf(i, c)
>             if artist:
>                 print ns.GetDetailsOf(i, 0), artist
>         break
> 
> 
>             Roger

Great tip, Roger!  This solution works for WMA files (I don't have any 
MP3 files handy), so I think it would work for any media files in Windows.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From bj_666 at gmx.net  Fri May 23 01:42:16 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 05:42:16 GMT
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <69n3poF33hfhfU1@mid.uni-berlin.de>

On Thu, 22 May 2008 23:37:45 -0400, John Salerno wrote:

> I know that it is good programming practice to keep GUI and logic code 
> physically separate, by using XRC for example, but I'm wondering if it's 
> also good practice (and even possible) to keep them separate from an 
> implementation standpoint as well. Basically what I mean is, should it 
> be possible to write, for example, the logic for a strategy game without 
> even knowing what the graphics will look like or how they will work?

Yes, that's possible.

> To be more specific, let's say I want to create a simple, 2D strategy 
> game. It will have a board layout like chess or checkers and the player 
> will move around the board. Let's say this is all I know, and perhaps I 
> don't even know *this* for sure either. Is it possible to write the 
> logic for such a game at this point?

Maybe even this is possible.  But here you are not only drawing the line
between GUI and logic but also within the logic part itself because the
board layout isn't (just) a GUI issue.  If you have checkers, hexagons, or
other shapes also has influence on the logic part, because you need
slightly different algorithms for finding ways from tile `A` to tile `B`,
or to decide when a piece is blocked by others, and how the rules to move
pieces around look like.  Just imagine how to modify chess rules to a
board with hexagonal patterns.  It would severely change the logic part.

> Another example could be printing messages to the player. If I need to 
> say "You killed the monster!", is there a general way to write this, or 
> do I need to specifically refer to GUI widgets and methods, etc. in 
> order for it to be displayed properly?

The observer pattern can be used here.  The GUI has to register a callback
function with your logic engine and every time you want to inform the
player about something, your game logic calls that function with the
message.  It doesn't have to know if it will be rendered as graphic on
screen, displayed as text in a terminal, or synthesized as sexy female
computer voice.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Fri May  9 10:11:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:11:44 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
Message-ID: <op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> I already have Python25, and need to install Python24. I would prefer not to
> remove Python25, but each Python version seems to update the registry, I
> guess (not sure), overwriting each other's entries. Any way to have both
> versions ?

They can coexist peacefully. The last one you install will be the default version to handle .py files automatically.

You may want to create a batch file like this:

<begin python24.cmd>
@c:\python24\python.exe %*
<end python24.cmd>

(and a similar one for 2.5; put them somewhere on your PATH, like c:\windows\system32)
Usage: python24 somescript.py

-- 
Gabriel Genellina



From rossgk at gmail.com  Fri May 30 14:10:17 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 30 May 2008 11:10:17 -0700 (PDT)
Subject: PyDev multiple source files?
Message-ID: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>

Newbie questions on PyDev project setup.   Things are going fine -
writing python code in eclipse/pydev and running them with various
imports etc, doing wxpython stuff blah, blah, blah. My .py code is in
a module, in a package, in a project. It runs fine.

Now I want to be able to break my single source file up into multiple
files to segregate functions, divide up with others, etc, but I don't
know how to configure it. I pulled one simple class definition out of
my single source file and created a new .py file with just that in
there. But now I'm stalled...

What is the equivalent of an 'include' statement. I assume there's
something I put into one .py file to say I'm using stuff in another
local .py file.   I tried using "import" but it doesn't seem to work -
ie code doesn't know about the class in the other file.

Also, how about global vars that are needed across multiple .py files?
Where do I declare them to be understood in all the files that use
that global.

I suspect there is something I do in __init__.py - perhaps the
equivalent of 'include' statements in there with all my globals
stuffed in there too???   I'm lost here, but will continue to play
with it.  Any hints appreciated.  Surely all python developers don't
cram everything into one huge file (I hope).

Ross.


From george.sakkis at gmail.com  Sat May  3 20:43:57 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 17:43:57 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org> 
	<fvirho$15ti$2@news.mtu.ru>
Message-ID: <9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>

On May 3, 7:12?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:
> > On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> >> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>
> >> > Arnaud Delobelle wrote:
>
> >> >> sum() works for any sequence of objects with an __add__ method, not
> >> >> just floats! ?Your algorithm is specific to floats.
>
> >> > This occurred to me also, but then I tried
>
> >> > sum(['abc', 'efg'], '')
>
> >> Interesting, I always thought that sum is like shortcut of
> >> reduce(operator.add, ...), but I was mistaken.
>
> >> reduce() is more forgiving:
> >> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
> > Hm, it works for lists:
> > sum(([1], [2]), [])
> > [1, 2]

So it's not reduce() that is more forgiving, it's sum() that makes an
exception for strings only.


> > However I find the seccond argument hack ugly. Does the sum way have any
> > performance advantages over the reduce way?
>
> Yes, sum() is faster:
>
> $ python -m timeit "" "sum([[1], [2], [3, 4]], [])"
> 100000 loops, best of 3: 6.16 usec per loop
>
> $ python -m timeit "import operator" \
> "reduce(operator.add, [[1], [2], [3, 4]])"
> 100000 loops, best of 3: 11.9 usec per loop

Not really; you measure the import and the attribute access time in
the second case. sum() is 2x faster for adding numbers only:

# Adding integers
python -mtimeit --setup="x=[1]*100" "sum(x)"
100000 loops, best of 3: 4.87 usec per loop
python -mtimeit --setup="from operator import add; x=[1]*100"
"reduce(add,x)"
100000 loops, best of 3: 10.1 usec per loop

# Adding floats
python -mtimeit --setup="x=[1.0]*100" "sum(x)"
100000 loops, best of 3: 5.14 usec per loop
python -mtimeit --setup="from operator import add; x=[1.0]*100"
"reduce(add,x)"
100000 loops, best of 3: 10.1 usec per loop

# Adding tuples
python -mtimeit --setup="x=[(1,)]*100" "sum(x,())"
10000 loops, best of 3: 61.6 usec per loop
python -mtimeit --setup="from operator import add; x=[(1,)]*100"
"reduce(add,x,())"
10000 loops, best of 3: 66.3 usec per loop

# Adding lists
python -mtimeit --setup="x=[[1]]*100" "sum(x,[])"
10000 loops, best of 3: 79.9 usec per loop
python -mtimeit --setup="from operator import add; x=[[1]]*100"
"reduce(add,x,[])"
10000 loops, best of 3: 84.3 usec per loop

George


From mypromise at sina.com  Wed May 21 10:26:49 2008
From: mypromise at sina.com (zhf)
Date: Wed, 21 May 2008 22:26:49 +0800
Subject: how to proccess the blank in the path on linux
Message-ID: <48343129.4060205@sina.com>

I want ro walk a directory and its sub directory on linux,
to find some shell script file, and run them, but I found some path belong
blank charactor, such as '8000 dir', if I write as follow, I got error
"no such file"
path = '8000 dir'
for root, dirs, files in os.walk(path):
cmd = ' '
cmd = 'cd ' + root
os.system(cmd)

How can I repair it?

thanks, best regards.





From paddy3118 at googlemail.com  Sun May 11 01:30:45 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:30:45 -0700 (PDT)
Subject: firefox add-on to grab python code handily?
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <0731c156-e28b-4a7d-bb24-af85bfa5ce8a@x41g2000hsb.googlegroups.com>

On May 10, 8:58 am, CM <cmpyt... at gmail.com> wrote:
> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
>
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
>
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
>
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?

Take a look at the crunchy project: http://crunchy.sourceforge.net/

- Paddy.


From gagsl-py2 at yahoo.com.ar  Fri May  2 15:16:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:16:57 -0300
Subject: Searching and replacing text ?
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
Message-ID: <op.uajjujs6x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:51:42 -0300, Oltmans <rolf.oltmans at gmail.com>  
escribi?:

> Hi,
>
> I'm new to Python (and admittedly not a very good programmer) and I've
> come across a scenario where I've to search and replace text in a
> file.
>
> For the sake of an example, I'm searching for every occurence of the
> text
> [[http://www.hotmail.com -> Hotmail]]
>
> I've to replace it with
> [http://www.hotmail.com Hotmail]
>
> I've come up with following scheme
> p=re.compile(r'\[\[')
> q=re.compile(r'->')
>
> p.sub('[',txt)
> q.sub('\b',txt)

Is it a constant text? Then use the replace method of string objects: no  
re is needed.

text = "This is [[http://www.hotmail.com -> Hotmail]] some text"
print text.replace("[[http://www.hotmail.com -> Hotmail]]",  
"[http://www.hotmail.com Hotmail]")
output: This is [http://www.hotmail.com Hotmail] some text

Or, do you want to find '[[' followed by some word followed by ' -> '  
followed by another word followed by ']]'?

r = re.compile(r'\[\[(.+?)\s*->\s*(.+?)\]\]')
print r.sub(r'[\1 \2]', text)
(same output as above)

() in the regular expression indicate groups, that you can reference as \1  
\2 in the replacement string.

-- 
Gabriel Genellina



From ptmcg at austin.rr.com  Sat May 24 09:42:56 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:42:56 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <43381ce3-3505-482e-82ac-0643eb57e25b@k37g2000hsf.googlegroups.com>

On May 21, 4:38?am, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
> ? # use match
> elsif (match = my_re2.match(line)):
> ? # use match
> elsif (match = my_re3.match(line))
> ? # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

Try this.

-- Paul

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return bool(self.value)


import re

tv = TestValue()
integer = re.compile(r"[-+]?\d+")
real = re.compile(r"[-+]?\d*\.\d+")
word = re.compile(r"\w+")

for inputValue in ("123 abc 3.1".split()):
    if (tv << real.match(inputValue)):
        print "Real", float(tv.value.group())
    elif (tv << integer.match(inputValue)):
        print "Integer", int(tv.value.group())
    elif (tv << word.match(inputValue)):
        print "Word", tv.value.group()

Prints:

Integer 123
Word abc
Real 3.1




From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 12:17:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 18:17:34 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <483ae29c$0$21027$426a74cc@news.free.fr>

erik.oosterwaal at gmail.com a ?crit :
> Hi All,
> 
(snip history and reasons to switch from old-style ASP).
> 
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
> 
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.

There are a couple points I don't get here. Mostly: how is your 
application logic separated from the presentation logic if you "intermix 
code directly into the HTML" ? Or are you pages including the libs, 
getting the appropriate data out of the DB, and then including another 
file acting as a template ? If so, then how are you're "pages" different 
from MVC frameworks controllers ?

> As Python would be the language I prefer over Ruby, I thought I'd ask
> here to see if anyone in the Python community knows if such a
> development-framework exists in Python.

mod_python + PSP would come to mind - it's probably the closer thing to 
ASP/PHP you'll get in Python - but I don't know if PSP is still 
maintained, and I would by no mean consider such a "framework" for new 
projects (and FWIW, PSP is a bit ugly IMHO).

Mako is a templating engine that let you have quite a lot of Python code 
inside your templates, but you'll still need a separate controller for 
most things.

Writing a wsgi-compatible framework that uses Mako as template engine 
and dispatch to controllers based on the filesystem might not be a very 
difficult task, but even then, I don't see the point of such an 
arrangement - specially when we already have more web frameworks than 
keywords...

> For example, does IronPython
> also use the same web forms approach as asp.net using VB? The
> frameworks I looked at (Django, Pylons) seem to be able to use
> different templating engines, does that mean it's just a question of
> finding the right one?

Django and Pylons both impose a distinct controller.

> Also, for Python there is also the problem of meaningful indentation.
> I'm not even sure if it's possible to use Python directly inside HTML,
> because indentation would be at the very least tricky to maintain.

It's indeed one of the ugly parts of PSP.

> I'm
> kind of hoping here that there are some solutions to these problems
> available in Python.
> 
>  Any help would be greatly appreciated.

I sincerely think you'd be better trying to get up and running with one 
of the existing MVC solutions like Django or Pylons. Now there are quite 
a couple other web frameworks in Python, you know - so perhaps you 
should have a closer look at them ?

My 2 cents...


From fuzzyman at gmail.com  Sun May 25 16:03:14 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 13:03:14 -0700 (PDT)
Subject: 22.800000 and a 1 on the end!!??
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <b2e867c0-f1c9-44a9-b481-5489cee214e6@m73g2000hsh.googlegroups.com>

On May 25, 8:58?pm, notnorweg... at yahoo.se wrote:
> >>> x = 5
> >>> x /= 2
> >>> x
> 2
> >>> x *=11.4
> >>> x
>
> 22.800000000000001
>
> ok where does the 1 in the come from?

Floating point arithmetic.

Michael Foord
http://www.ironpythoninaction.com/


From ivan.illarionov at gmail.com  Sun May 25 14:46:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 11:46:32 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
Message-ID: <68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>

Jerry Stuckle wrote:
> Lie wrote:
> > On May 22, 12:28 pm, NC <n... at iname.com> wrote:
> >> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
> >>> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't.
> >>> Yet, I want learn the guts of it instead of just booting up some
> >>> wordwank or whatever.
> >> Here's a simple computation to consider... ?WordPress' codebase is
> >> approximately a megabyte of PHP code and megabyte of JavaScript code.
> >> Assuming that the average line of that code is 50 characters long, you
> >> are looking at 20,000 lines of code in PHP and as many in JavaScript.
> >> Based on the notion that the average developer out there writes 100
> >> lines a day, either you're in for a two-year project or your product
> >> is going to have seriously reduced functionality compared to something
> >> that's been freely available for years. ?What's your choice?
>
> > Nope, the core functionality of a blogging software could be
> > replicated in just a few lines of PHP codes, in the range of tens to
> > hundreds of lines. If you're creating your own blogging software, you
> > wouldn't seriously think you'd recreate all those things such as
> > pingbacks, commenting system, etc, etc, etc. No, you'd start with some
> > basic core functionalities: a few simple server side includes only.
>
> As he said - it's either a two man-year project or your product is going
> to have seriously reduced functionality. ?It looks like you are opting
> for the latter.
>
> Also, you still need to write the server-side includes. ?But they won't
> do nearly enough for everything WordPress does.

If the OP wants to learn the guts of the blog or to implement the blog
from scratch, Python/Django would be a better choice than PHP. The
reason is that he can reuse and customize existing high quality
components for all these auth/auth, admin, comments, etc, etc, etc.
Another reason is that Python and Django encourage very clean design
while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
PHP wrapped in spaghetti HTML". 2 man/year in PHP == 2 man/week in
Python/Django.

And there are Python/Django blog applications that already do almost
everything (and maybe more) that WordPress does. http://byteflow.su/
is one of them (IMHO the most promising).

Ivan



From deets at nospam.web.de  Sun May  4 17:27:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 23:27:28 +0200
Subject: pygame.mixer.load not working
In-Reply-To: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>
References: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>
Message-ID: <686o25F2rb5iqU1@mid.uni-berlin.de>

globalrev schrieb:
> import pygame
> 
> pygame.mixer.music.load(example1.mp3)
> pygame.mixer.music.play(loops=1, start=0.0)
> 
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 3, in
> <module>
>     pygame.mixer.music.load(example1.mp3)
> NameError: name 'example1' is not defined
> 
> example1 is in the same directory as the script

http://docs.python.org/tut/node5.html#SECTION005120000000000000000

Diez


From arnodel at googlemail.com  Sat May 31 11:48:40 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 16:48:40 +0100
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<m2fxryc2db.fsf@googlemail.com>
	<7a41e745-956b-4582-bd61-eac699f1d892@34g2000hsf.googlegroups.com>
Message-ID: <m27idabhk7.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 31, 4:19?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Cameron <cameronla... at gmail.com> writes:
>> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
>> > Graham article</a> and he builds an accumuator generator function in
>> > the appendix. His looks like this:
>>
>> > <pre>
>> > def foo(n):
>> > ? s = [n]
>> > ? def bar(i):
>> > ? ? s[0] += i
>> > ? ? return s[0]
>> > ? return bar
>> > </pre>
>>
>> > Why does that work, but not this:
>>
>> > <pre>
>> > def foo(n):
>> > ? s = n
>> > ? def bar(i):
>> > ? ? s += i
>> > ? ? return s
>> > ? return bar
>> > </pre>
>>
>> Others have explained why, but this looks like "pythonized LISP" to
>> me. ?I would rather use a generator function:
>>
>> def foo(n):
>> ? ? while True:
>> ? ? ? ? n += yield n
>>
>> Although the problem is that you can't send it values the first time
>> round!
>>
>> >>> bar = foo('s')
>> >>> bar.next()
>> 's'
>> >>> bar.send('p')
>> 'sp'
>> >>> bar.send('am')
>>
>> 'spam'
>>
>> But:
>>
>> >>> bar = foo(3)
>> >>> bar.send(2)
>>
>> Traceback (most recent call last):
>> ? File "<stdin>", line 1, in <module>
>> TypeError: can't send non-None value to a just-started generator
>
> I find the "pythonized LISP" solution more understandable, even
> without the initial next() requirement. YMMV
>
> George

In that case a class may be better?  IMHO, what is such a natural
idiom in LISP does not translate well literally into Python.

class Foo(object):
    def __init__(self, n):
        self.s = n
    def __call__(self, i)
       self.s += i
       return self.s
 
Anything to avoid the mutable container trick!  Of course 'nonlocal'
takes care of this in py3k.  I have missed the absence of 'nonlocal' a
lot, but now that it is around the corner, I grow less sure about it.

-- 
Arnaud


From wizzardx at gmail.com  Sun May 25 13:36:06 2008
From: wizzardx at gmail.com (David)
Date: Sun, 25 May 2008 19:36:06 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <5hv*dSKds@news.chiark.greenend.org.uk>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
	<mailman.1555.1211681333.12834.python-list@python.org>
	<5hv*dSKds@news.chiark.greenend.org.uk>
Message-ID: <18c1e6480805251036u22ec09f9y1d846b4698d6c09a@mail.gmail.com>

Hi again.

Taking the advice of numerous posters, I've been studying BDD further.

I spent a while looking for a Python library which implemented BDD in
Python similar to jbehave, as described by Dan North on this page:
http://dannorth.net/introducing-bdd. I did find a few, but they either
had awful-looking syntax, or they were overly-complicated. So I
decided that using regular unit tests (via nosetest) was good enough,
even if it doesn't have support for stories, scenarios, givens, etc,
and it uses words with "Test" in it instead of "Behavior".

One thing I just tried was to put together a basic stack class
following BDD, with nosetest. I got the idea from this page:
http://www.ibm.com/developerworks/web/library/j-cq09187/index.html

It was an interesting exercise, and I'm encouraged to try it further.

I ended up with these 2 modules:

======test_stack.py========

from nose.tools import raises
import stack

class TestStackBehaviour:
    def setup(self):
        self.stack = stack.Stack()
    @raises(stack.Empty)
    def test_should_throw_exception_upon_pop_without_push(self):
        self.stack.pop()
    def test_should_pop_pushed_value(self):
        self.stack.push(12345)
        assert self.stack.pop() == 12345
    def test_should_pop_second_pushed_value_first(self):
        self.stack.push(1)
        self.stack.push(2)
        assert self.stack.pop() == 2
    def test_should_leave_value_on_stack_after_peep(self):
        self.stack.push(999)
        assert self.stack.peep() == 999
        assert self.stack.pop() == 999
    def test_should_pop_values_in_reverse_order_of_push(self):
        self.stack.push(1)
        self.stack.push(2)
        self.stack.push(3)
        assert self.stack.pop() == 3
        assert self.stack.pop() == 2
        assert self.stack.pop() == 1
    @raises(stack.Empty)
    def test_peep_should_fail_when_stack_is_empty(self):
        self.stack.peep()
    def test_should_be_empty_when_new(self):
        assert len(self.stack) == 0

======stack.py========

class Empty(Exception):
    """Thrown when a stack operation is impossible because it is empty"""
    pass

class Stack:
    """Basic implementation of a stack"""
    def __init__(self):
        self._data = []
    def push(self, value):
        """Push an element onto a stack"""
        self._data.append(value)
    def pop(self):
        """Pop an element off a stack"""
        try:
            return self._data.pop()
        except IndexError:
            raise Empty
    def peep(self):
        """Return the top-most element of the stack"""
        try:
            return self._data[-1]
        except IndexError:
            raise Empty
    def __len__(self):
        """Return the number of elements in the stack"""
        return len(self._data)

===================

Does the above look like a decent BDD-developed class?

Is it ok that there are no 'scenarios', 'stories', 'having', 'given',
etc references?

Some pages suggest that you should use so-called contexts
(EmptyStackContext, StackWithOneElementContext, FullStackContext,
AlmostFullStackContext, etc).

Would you normally start with a basic TestStackBehavoiur class, and
when Stack becomes more complicated, split the tests up into
TestEmptyStackContext, TestStackWithOneElementContext, etc?

Another thing I noticed is that some of my test cases were redundant.
Would you normally leave in the redundant tests, or remove the ones
which are included in the more general test?

Also, I have another question. How do you unit test event loops?

eg: Your app is a (very basic) service, and you want to add some
functionality (following BDD principles)

Here's an example unit test:

class TestServiceBehavior:
    def setup(self):
       ...
    def test_handles_event_xyz(self):
       ...

If your service is normally single-threaded, would your unit test need
to start the service in a separate thread to test it?

Another method would be to update the event loop to enable unit
testing. eg only iterate once if a 'being_tested' variable is set
somewhere.

None of the above are ideal. What is a good way to unit test event loops?

David.


From arnodel at googlemail.com  Sun May 25 16:30:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 25 May 2008 21:30:06 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <m2skw65dpt.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> dear pythonistas,
>
> So imagine that we have a set of sets S. If we pick arbitrarily one
> set, s0, what are all the combinations of other sets in S which when
> combined by set operations result in s0?
>
> s0 = set([1])
> s1 = set([1,2])
> s2 = set([2])
> S = set([s0,s1,s2])
> one answer we're searching for is s0 = s1 - s2
>
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...) and arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any operation or function which
> takes and returns sets.
>
> I think this problem is related to integer partitioning, but it's not
> quite the same. The range of answers has a little combinatorial
> explosion problem as S gains new members. In my problem, len(S) is
> usually on the order of 1M, and in the worst case, 10M, and there are
> on the order of 10k elements.
>
> My attempts to come up with an algorithm have not succeeded. Any ideas
> occur to you folks? -- PB.

Unless your sets have some sort of pattern, it sounds to me like this
problem is at least exponential...  Good luck!

-- 
Arnaud


From johnjsal at gmailNOSPAM.com  Sun May 11 16:16:53 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Sun, 11 May 2008 16:16:53 -0400
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
Message-ID: <48275446$0$11628$607ed4bc@cv.net>

XLiIV wrote:

> The range() function returns a list and list is a sequence, isn't?

I think you're missing the point. To me, there seems to be a fundamental 
difference between these two things:

---

people = ['Sam', 'Bob', 'Fred']

for name in people:
     print name

---

AND

---

num = 33

for x in xrange(10):
     print num += 1

---

To me, the first example is a pure use of the for loop. You are 
iterating through an object and *using* the items you are stepping through.

The second example, however, is simply doing something 10 times, and 
what it's doing has nothing to do with 'x' or xrange. So it seems like 
an abuse of the for loop.


From castironpi at gmail.com  Tue May  6 23:52:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 20:52:00 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <d30b2c74-ba6a-45a9-9b63-3a682cf7dfec@b1g2000hsg.googlegroups.com>

On May 6, 10:20?am, krumbleb... at gmail.com wrote:
> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.
>
> I know how to reverse a list (with the reverse method - very handy),
> but it doesn't seem possible to reverse a dict.

It is not.  Dictionaries provide constant time add and remove, -not-
order.  Are you sorting based on key or value?

If you want a sorted state and sorted remove, use the 'bisect' module.

> I suspect what I need to do is somehow go from:
>
> thelist=list(thedict)
> thelist.reverse()
> thedict=dict(thelist)
>
> Does anyone know how to convert / or reverse a dict?
>
> thanks
>
> kb.



From bj_666 at gmx.net  Fri May  9 05:52:03 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 May 2008 09:52:03 GMT
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <68il63F2su97jU5@mid.uni-berlin.de>

On Fri, 09 May 2008 02:13:34 -0700, XLiIV wrote:

> Let's take a look at two ways of thinking...
> the standard one which is well-known and loved by almost everyone :)
> and that crazy concept below which suprised evan me :wacko:
> 
> <code>
> import time
> 
> ftime = time.time()
> localtime = time.localtime(ftime)
> localtime = list(localtime[:3])
> localtime = [str(i) for i in localtime]
> print '-'.join(localtime)
> </code>
> 
> It's harder to read than the below concept, isn't?
> Maybe I didn't used to this way of thinking yet. I hope it'll change
> soon or i'll quit ;)

Maybe it's also harder to read than this::

  print '-'.join(map(str, time.localtime()[:3]))

Of course, if you don't mind the extra padding zeroes in day and month::

  print time.strftime('%Y-%m-%d')

> <almost code>
> time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
> -> '-'.join()
> </almost code>

You are a little bit inconsistent with the arguments.  `g` is explicitly
mentioned in ``list(g)``.  But why the intermediate names at all?

> My example conclusion and not-ansewered-yet question...
> -it's nice to read and choosing the good names to variables aren't so
> important
> -what is the purpose of the variables here? :)

Exactly.  But look at my snippet above: No intermediate names either.

> I realize that there is no chance to implement it, but I really want
> to share it :]

Maybe you should look into languages like SmallTalk or Io where everything
is done with method calls.  Your example in Io::

  Date now do("#{year}-#{month}-#{day}" interpolate linePrint)

Ciao,
	Marc 'BlackJack' Rintsch


From admin at remembernobody.com  Fri May  2 05:34:27 2008
From: admin at remembernobody.com (admin at remembernobody.com)
Date: Fri, 2 May 2008 02:34:27 -0700 (PDT)
Subject: Python documentation
Message-ID: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>

Hello,

I have been learning python for some time using the dive into python
book. I am interested to know if anyone can recommend a book which
covers more advanced topics like threading and potentially GUI style
coding.

Regards,

Ronald


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:19:52 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:19:52 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>
	<e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>
Message-ID: <48327b93$0$15299$426a74cc@news.free.fr>

Henrique Dante de Almeida a ?crit :
> On May 19, 5:35 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>>>  The situation would be simpler if there were good well-known toolkits
>>> for optimization in python (like numpy for matrix operations), but
>>> that's not the case.
>> There's at least Psyco (if you're willing and able to restrict
>> yourself from using some of the most dynamic parts of Python - which
>> might not be a problem here).  One could also mention stuff like Pyrex
>> and Cython.
> 
>  I meant toolkits for "optimization problems", not "code
> optimization".

oops, sorry.


From castironpi at gmail.com  Wed May 14 12:58:46 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 09:58:46 -0700 (PDT)
Subject: What is self.file = file for?
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
	<f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com> 
	<482a9438$0$21057$426a34cc@news.free.fr>
Message-ID: <08469c91-45f2-481e-8281-44f490e851f2@a1g2000hsb.googlegroups.com>

On May 14, 2:26?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> afrobeard a ?crit :
>
> (top-post corrected. Please, do not top-post).
>
>
>
>
>
> > On May 14, 3:08 am, wxPytho... at gmail.com wrote:
> >> Hello!
>
> >> I have trouble understanding something in this code snippet:
>
> >> class TextReader:
> >> ? ? """Print and number lines in a text file."""
> >> ? ? def __init__(self, file):
> >> ? ? ? ? self.file = file
> >> ? ? ? ? .
> >> ? ? ? ? .
> >> ? ? ? ? .
>
> >> When would you do a thing like ?self.file = file ?? I really don't
> >> find an answer on this. Please help me understand this.
>
> > If you are familiar to C++ or a similar language, the concept of the
> > this pointer might not be alien to you. self in this context is
> > basically a reference to the class itself.
>
> Nope. It's a reference to the instance.
>
> > Hence self.file is creating
> > a class member
>
> Nope. It's setting an instance attribute.
>
> > and setting to the input from file.
>
> > As Gary pointed out, during initialization, only the latter parameter
> > i.e. file is being passed to __init__
>
> Nope. Obviously, both parameters are passed - else it just wouldn't
> work. Given an object 'obj' instance of class 'Cls', you can think of
> obj.method(arg) as a convenient shortcut for Cls.method(obj, arg).- Hide quoted text -
>
> - Show quoted text -

I am at the point of open-source, and I agree.


From jurgenex at hotmail.com  Fri May  9 03:01:02 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Fri, 09 May 2008 07:01:02 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>
	<68ia3oF2t5308U1@mid.individual.net>
Message-ID: <7ft7249u3a7vmgm50pi7sfcp7m8fevoq2m@4ax.com>

"Waylen Gumbal" <wgumgfy at gmail.com> wrote:
> so why not just skip the thread or toss the OP in your 
>killfile so you don't see his postings. 

Done years ago.

>If others want to discuss his 
>topics, who are you or I to tell them not to?

They are very welcome to do so in an appropriate NG for those topics.

jue


From exarkun at divmod.com  Mon May 12 22:35:08 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 22:35:08 -0400
Subject: Popen pipe hang
In-Reply-To: <64cf0966-5e39-473c-8923-7a81ff99f905@u6g2000prc.googlegroups.com>
Message-ID: <20080513023508.6859.732328355.divmod.quotient.62766@ohm>

On Mon, 12 May 2008 17:35:44 -0700 (PDT), schickb <schickb at gmail.com> wrote:
>I'm trying to pipe data that starts life in an array('B') object
>through several processes. The code below is a simplified example. The
>data makes it through, but the wait() always hangs. Is there a better
>way to indicate src.stdin has reach EOF?
>
>from subprocess import Popen, PIPE
>from array import array
>
>arr = array('B')
>arr.fromstring("hello\n")
>
>src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
>dst = Popen( ["cat"], stdin=src.stdout)
>arr.tofile(src.stdin)
>src.stdin.close()
>dst.wait()

Alas, you haven't actually closed src's standard input.  Though you did
close src.stdin, you didn't close the copy of it which was inherited by
dst!  So though the file descriptor is no longer open in your main process,
it remains open due to the reference dst has to it.  You can fix this by
having Popen close all file descriptors except 0, 1, and 2 before it execs
cat - pass close_fds=True to the 2nd Popen call and you should get the
behavior you want.

Jean-Paul


From mensanator at aol.com  Fri May 23 14:44:19 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 23 May 2008 11:44:19 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org> 
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com> 
	<48365893$0$11617$607ed4bc@cv.net>
Message-ID: <7a73869e-6091-430b-a68e-eef7d831ea5d@59g2000hsb.googlegroups.com>

On May 23, 12:39?am, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> Mensanator wrote:
> > On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> >> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> >> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>
> > If you actually need that many digits, use a different library.
>
> >>>> import gmpy
>
> >>>> print gmpy.pi(64) # 64 bit precision
> > 3.14159265358979323846
> >>>> print gmpy.pi(128) # 128 bit precision
> > 3.141592653589793238462643383279502884197
> >>>> print gmpy.pi(16384) # 16384 bit precision
> > 3.14159265358979323846264338327950288419716939937510582097494459
> > 23....
>
> Heh!
>
> I wonder who needs that many digits?

Pi digits specifically, or that many digits
in general? I generally don't use pi, but
I routinely work with numbers having that
many digits.

>
> Certainly not number theorists (they need a LOT more).

That depends on the problem. What's important
to the number theorist is not how many digits
there are, but the fact that every single one
of them is significant. If pi is needed, the
mantissa must have as many digits as the number
to avoid loss of significance.

For example, in the Collatz Conjecture, there
is a nice closed form equation to tell you the
ith, kth Generation Type [1,2] Mersenne Hailstone:

a(i,k) = 2**(6*((i-1)*9**(k-1)+(9**(k-1)-1)/2+1)-1)-1

Which for a modest request like a(1,6) returns
a number with 53,338 decimal digits. And you
can't even compute the 11th generation without
getting an "Outrageous Exponent" exception
(the exponent exceeded 32 bits).

Now, it's true you can't count up to such a
number, but you can readily determine its Collatz
Sequence as they are logarithmic (for a(1,6) the
sequence contains 854,697 odd numbers and about
twice that many even numbers).

And since a(1,6) has only 177,149 bits, it's
easy to verify that it is, indeed, the first
of the infinite members of the 6th generation.

> Certainly not
> physicists -- they need about 30 digits to be within 1% of any
> measurement from molecules to galaxies. ?Certainly not engineers, they
> need half the digits that physicists need. ?Cryptographers are making a
> dire mistake if they are using PI in any computations (possible
> exception for elliptic curves -- see number theorists, above) ... so --
> other than PI-philes, who needs PI to thousands of digits?- Hide quoted text -
>
> - Show quoted text -



From castironpi at gmail.com  Wed May  7 13:57:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 10:57:41 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
Message-ID: <36a899fb-4480-437e-b1f5-0c4676575bbe@r66g2000hsg.googlegroups.com>

On May 7, 12:30?pm, Paul Melis <p... at floorball-flamingos.nl> wrote:
> umpsu... at gmail.com wrote:
> > Here is my code for a letter frequency counter. ?It seems bloated to
> > me and any suggestions of what would be a better way (keep in my mind
> > I'm a beginner) would be greatly appreciated..
>
> Not bad for a beginner I think :)
>
>
>
>
>
> > def valsort(x):
> > ? ?res = []
> > ? ?for key, value in x.items():
> > ? ? ? ? ? ?res.append((value, key))
> > ? ?return res
>
> > def mostfreq(strng):
> > ? ?dic = {}
> > ? ?for letter in strng:
> > ? ? ? ? ? ?if letter not in dic:
> > ? ? ? ? ? ? ? ? ? ?dic.setdefault(letter, 1)
> > ? ? ? ? ? ?else:
> > ? ? ? ? ? ? ? ? ? ?dic[letter] += 1
> > ? ?newd = dic.items()
> > ? ?getvals = valsort(newd)
> > ? ?getvals.sort()
> > ? ?length = len(getvals)
> > ? ?return getvals[length - 3 : length]
>
> > thanks much!!
>
> Slightly shorter:
>
> def mostfreq(strng):
> ? ? ?dic = {}
> ? ? ?for letter in strng:
> ? ? ? ? ?if letter not in dic:
> ? ? ? ? ? ? ?dic[letter] = 0
> ? ? ? ? ?dic[letter] += 1
> ? ? ?# Swap letter, count here as we want to sort on count first
> ? ? ?getvals = [(pair[1],pair[0]) for pair in dic.iteritems()]
> ? ? ?getvals.sort()
> ? ? ?return getvals[-3:]
>
> I'm not sure if ?you wanted the function mostfreq to return the 3 most
> frequent letters of the first 3 letters? It seems to do the latter. The
> code above uses the former, i.e. letters with highest frequency.
>
> Paul- Hide quoted text -
>
> - Show quoted text -

I think I'd try to get a deque on disk.  Constant indexing.  Store
disk addresses in b-trees.  How long does 'less than' take?  Is a
sector small, and what's inside?


From torriem at gmail.com  Sun May 11 12:34:50 2008
From: torriem at gmail.com (Michael Torrie)
Date: Sun, 11 May 2008 10:34:50 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <4827202A.5030104@gmail.com>

Larry Hale wrote:
> Now I *presume* my problem (at this point) is that I need to have
> libmagic named as "magic1.dll" -wherever- this module is looking for
> it.  I'm just not sure, let alone if this is true, WHERE Python/
> modules expect to find such things.
> 
> Also, which version(s)/file(s) should be placed where, or...??

The dll you are looking for is here:

http://downloads.sourceforge.net/gnuwin32/file-4.21-bin.zip?modtime=1180175868&big_mirror=1

The .dll.a file you mention is just a linker stub for when you want to
compile against it (as you are doing when building python-magic).

The magic1.dll file in the file-4.21-bin.zip package should be placed
anywhere in the path.  Since you'll be using it with python, you could
probably stick it in the python25/bin folder (where ever your python
system is installed).




From regnarg at seznam.cz  Tue May 13 12:59:22 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Tue, 13 May 2008 18:59:22 +0200
Subject: Fill memeory with endless loop?
In-Reply-To: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
Message-ID: <20080513165922.GA10304@sirius>

On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
> if i do something like
> while 1:
>     print "x"
> 
> will the program ever stop because it runs out of memory?

No, there is no reason to run out of memory. This will simply
make an everlasting x-printer and there is no need to store
anything (except output buffers, terminal scrollback, etc.,
but all of this is temporary and of limited size). In case of
adding elements to a list, the memory usage can, of course,
grow unlimitedly. On linux, if the process eats up too much
memory, it gets killed. I do not know about windows, but
they would probably crash with a BSOD or something of that
sort.





From wxPythoner at gmail.com  Sat May 10 16:56:13 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:56:13 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
Message-ID: <f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>

I am stunned that this simple misunderstanding of mine ended in a
mathematical clash of a sort. :)  You guys really blew me away wih
your mathematical knowledge. And also the 0**0 is a thing I've never
thought about trying, until now that is. If the mathematical rule is
that EVERYTHING raised to the power of 0 is 1, then we should accept
that, even in the case of 0**0. This is just the way it is.

I have two another interesting things to discuss about, for which I'll
open new posts on this group. Look for "Python doesn't recognize quote
types" and "Python, are you ill?".


From hat at se-162.se.wtb.tue.nl  Thu May 15 06:48:49 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 15 May 2008 12:48:49 +0200
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <slrng2o58h.854.hat@se-162.se.wtb.tue.nl>

On 2008-05-15, Gabriel <gabe at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
>
> I got this example from page 38 of Beginning Python.

This is a more complicated case of

a = []
b = a

a.append(1)
print b  # Will print "[1]"

This is the case, because both a and b refer to the same list data-value.


In your case, basically what you are doing is

a = []          # a is an empty list (introduced for easier explanation)
tasks = [a]     # tasks is a list with 1 'a'
tasks = tasks*6 # you create 5 additional references to 'a' in 'tasks

ie tasks is now the equivalent of [a, a, a, a, a, a]. It refers to the same 'a'
list 6 times. When you print 'tasks', you actually print the same 'a' value 6
times.


in particular, tasks is **NOT**

a,b,c,d,e,f = [], [], [], [], [], []  # create 6 different empty list values
tasks2 = [a, b, c, d, e, f]

although when you print both tasks, you won't see the difference.


Next, 'tasks[0]' refers to the first list element, that is, value 'a'. To that
list you append an element. In other words, you do "a.append(1)".

However, since tasks has 6 references to the same list 'a', all its members
appear to be changed (but you are really displaying the same value 6 times).


You can query this equality with 'is':

print tasks[0] is tasks[1]  # will print 'True'
print tasks2[0] is tasks2[1]  # Will print 'False'


Sincerely,
Albert


From vivainio at gmail.com  Sat May 24 05:43:23 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sat, 24 May 2008 09:43:23 GMT
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
Message-ID: <87r6bsvxz7.fsf@gmail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:


> I don't know if you'd label it 'elegant', but as far as I'm
> concerned, storing serialized objects as blobs in a relational
> database is mostly non-sense. If I use a relational database, it's
> because it is a *relational* database. If you want an OODB, then we
> have the ZODB, Durus and a couple others.

... not to forget object-relational mappers like SQLAlchemy, SQLObject...


From wizzardx at gmail.com  Sun May  4 13:37:04 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 19:37:04 +0200
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
Message-ID: <18c1e6480805041037p5147d2a7rfe9f6b576985d30b@mail.gmail.com>

>
>  Another way would be to listen to all events sent through X, and act
>  based on the mouse events. VNC does something similar.
>

See the 'record_demo.py' example that comes with python-xlib.


From lists at cheimes.de  Tue May 20 16:43:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 20 May 2008 22:43:53 +0200
Subject: List of disk drives on Windows?
In-Reply-To: <f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>
References: <2008052013180816807-bob@passcalnmtedu>	<mailman.1395.1211312728.12834.python-list@python.org>
	<f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>
Message-ID: <48333809.2020903@cheimes.de>

Mike Driscoll schrieb:
> On May 20, 2:45 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>> Bob Greschke wrote:
>>> This MUST have been asked before, but I can't seem to Google the right
>>> thing.  How can I get a list of drives on a Windows box, like ["C:\",
>>> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>> A couple of options to get the ball rolling:
>>
>> 1) win32api.GetLogicalDriveStrings()
> 
> 
> I gave this a go to see how it worked and ti gave me this:
> 
> 'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
> \x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'
> 
> Not exactly what I expected. Do I have to parse out the "\\\x00"
> myself or is there an information level switch I should add?

The data is separated by NUL bytes. Split it with \x00 and you'll get a
list of drives:
>>
"A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00".split("\x00")
['A:\\', 'C:\\', 'D:\\', 'G:\\', 'I:\\', 'L:\\', 'P:\\', 'Q:\\', 'R:\\',
'U:\\', 'X:\\', 'Y:\\', 'Z:\\', '']

Christian



From straton at lampsacos.demon.co.uk  Thu May 22 05:54:19 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Thu, 22 May 2008 10:54:19 +0100
Subject: simple way to touch a file if it does not exist
In-Reply-To: <ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
Message-ID: <g13fsc$onq$1$8300dec7@news.demon.co.uk>

After os.path.exists, you need to check it _is_ a
file, and not a directory.

Giampaolo Rodola' wrote:
> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>> what are the simple ways?
>> I could think of os.open(), os.exec(touch file)
>>
>> are there any simpler methods?
> 
> Just use os.path.exists to check for file existence and open() as
> replacement for touch.
> 
>>>> import os
>>>> if not os.path.exists('file'):
> ...     open('file', 'w').close()
> ...
> 
> 
> --- Giampaolo
> http://code.google.com/p/pyftpdlib/


From pistacchio at gmail.com  Thu May  8 06:02:58 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 12:02:58 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
	<efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>
Message-ID: <fvuj4k$74h$1@aioe.org>

bruno.desthuilliers at gmail.com ha scritto:
> On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
>> George Sakkis ha scritto:
> (snip)
>>> What does it matter if it's a single file or a dozen under a package ?
>>> "Installation" for pure Python packages can be as simple as copying
>>> the package under any directory in your PYTHONPATH.
>> well, it doesn't matter if it's a single file or a package, but it
>> _does_ matter if you have to put them under the path where python is
>> installed because, in a typical shared web hosting environment (such the
>> one that i use) you don't have access to system directories.
> 
> You *never* have to install anything in the default path - install
> your python libs wherever you want, and just make sure this wherever
> is in your python path (usually via the PYTHONPATH environment
> variable).
> 

again, in a shared environment, you don't have access to environment 
variables. all you can do is copy files in your own little directory, 
and that's it. this directory is never something like /share/python, but 
something like /home/averagejoe. and /home/averagejoe is not usually in 
the PYTHONPATH

>>> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
>>> and fast.
>> woudl you suggest mako over cheetah?
> 

> As far as I'm concerned, I would.  Now if you're looking for a
> somewhat barebone MVC framework, you may want to have a look at
> web.py.
> 

i've tried mako. sees to work fine for me, both for its potential and 
for its "installation" method. in fact i just copied it under my own 
directory

/home/averagejoe
   test.py
   /mako
     mako stuff

and the following testcase worked well:

from mako.template import Template
mytemplate = Template("hello world!")
print mytemplate.render()

can i do the same with web.py? mind that i work under an apache 
environment (mod_python).

now, back to mako. can you provide an example of blocks and nested 
blocks in mako? the documentation doesn't seem to be too clear in this 
reguard.

for example, if i want to show a table with a list of restaurants 
(gathered from a db query), i can construct a template like this:

<table>
% for rest in restaurants:
   <tr>${rest}<tr>
% endfor
</table>

but what if if each restaurant has a list of dishes (pasta, pizza, meat, 
pie) and some (or each) dish has the ingrediets? is it just like 
embedding pure python into the template ( like $(rest['dish'])  and 
$rest['dish']['ingredient']) )?

thanks for you interest


From sisson.j at gmail.com  Thu May  1 22:55:15 2008
From: sisson.j at gmail.com (J Sisson)
Date: Fri, 2 May 2008 02:55:15 +0000
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <CeuSj.107251$rd2.30692@pd7urf3no>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <4297a9020805011955l5c9b4a39o256be5c4455980c8@mail.gmail.com>

The first method allows python to be installed in an alternate location
(i.e. /usr/local/bin).  "env" in this case is being used to launch python
from whatever location python is installed to.

I like to think of it as an "abstraction" of the python location to make it
"multiplatform-friendly" since not all Unix systems put python in /usr/bin.

On Fri, May 2, 2008 at 1:36 AM, Yves Dorfsman <yves at zioup.com> wrote:

> On UNIX, some people use
> #!/usr/bin/env python
>
> While other use
> #!/usr/bin/python
>
> Why is one preferred over the other one ?
>
> Thanks.
>
> --
> Yves.
> http://www.SollerS.ca
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Computers are like air conditioners...
They quit working when you open Windows.
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From noah at noah.org  Mon May  5 18:22:54 2008
From: noah at noah.org (Noah)
Date: Mon, 5 May 2008 15:22:54 -0700 (PDT)
Subject: get the pid of a process with pexpect
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
Message-ID: <a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>

On May 5, 7:18 am, Karim Bernardet <bernar... at cppm.in2p3.fr> wrote:
> ssh_tunnel = pexpect.spawn (tunnel_command % globals())
> ...
> print ssh_tunnel.pid
>
> but ssh_tunnel is not the pid of the ssh tunnel
>
> Is there a way to get it using pexpect ?

You will notice that you can't get this information even from the
shell. This does not work of course:

    ssh -f -N -L 81:localhost:80 noah at www.example.com
    echo $!

However, this seems to work, but I don't trust it. Certainly it isn't
a real daemon, but this work OK for you if you only need to manage the
tunnel for the duration of your script. Notice that now Bash had the
PID in $! variable:

    ssh -N -L 81:localhost:80 noah at www.example.com &
    TUNNEL_PID=$!
    echo $TUNNEL_PID

What command-line are you using for 'tunnel_command'? This is hard
because SSH does not provide a way to get the PID of the tunnel if you
request ssh to go to the background (see the -f option). I always
considered this a bug because it makes scripting hard. Even if you
start the tunnel from a shell you can't use $! to get the PID because
the daemonizing is initiated by ssh. This is not the same use using
the shell to put a command into the background, so the shell won't
know anything about the PID.

I'm not sure if you can put ssh into the background using the shell
and still have the tunnel work. So you might start a tunnel something
like this:

    ssh -f -N -L 80:localhost:80 username at www.example.com

But can you also do something like this?

    ssh -N -L 80:localhost:80 username at www.example.com &
    echo $!

And for that to even work you will have to use Pexpect to start bash.
Remember, Python doesn't start your command in a subshell, so you have
to specify it if you want. So your tunnel command would have to be
something like this:

    tunnel_command = '''bash -c "ssh -N -L ...foo... &"'''
    ssh_tunnel = pexpect.spawn (tunnel_command % globals())

--
Noah


From szhorvat at gmail.com  Sat May  3 12:50:34 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Sat, 03 May 2008 18:50:34 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
Message-ID: <fvi54o$26lb$1@toralf.uib.no>


I did the following calculation:  Generated a list of a million random 
numbers between 0 and 1, constructed a new list by subtracting the mean 
value from each number, and then calculated the mean again.

The result should be 0, but of course it will differ from 0 slightly 
because of rounding errors.

However, I noticed that the simple Python program below gives a result 
of ~ 10^-14, while an equivalent Mathematica program (also using double 
precision) gives a result of ~ 10^-17, i.e. three orders of magnitude 
more precise.

Here's the program (pardon my style, I'm a newbie/occasional user):

from random import random

data = [random() for x in xrange(1000000)]

mean = sum(data)/len(data)
print sum(x - mean for x in data)/len(data)

A little research shows that Mathematica uses a "compensated summation" 
algorithm.  Indeed, using the algorithm described at
http://en.wikipedia.org/wiki/Kahan_summation_algorithm
gives us a result around ~ 10^-17:

def compSum(arr):
     s = 0.0
     c = 0.0
     for x in arr:
         y = x-c
         t = s+y
         c = (t-s) - y
         s = t
     return s

mean = compSum(data)/len(data)
print compSum(x - mean for x in data)/len(data)


I thought that it would be very nice if the built-in sum() function used 
this algorithm by default.  Has this been brought up before?  Would this 
have any disadvantages (apart from a slight performance impact, but 
Python is a high-level language anyway ...)?

Szabolcs Horv?t


From mensanator at aol.com  Mon May 12 15:02:41 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 12 May 2008 12:02:41 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>

On May 12, 12:27?pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
> Python" each night. Does anyone see any value in learning Python when you
> don't need to for school, work, or any other reason? I mean, sure, there's
> value in learning anything at any time, but for something like a programming
> language, I can't help but feel that I will be mostly unable to use what I
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense!

Seems silly to learn a programming language for it's own sake.
Why would you want to learn something you aren't going to use?

My attitude is I may not have an immediate use planned, but such
uses should become apparent as I learn more. For example, I collect
movie ticket sales stats from The Internet Movie Database. That meant
going to their site, finding the page that has the stats for a certain
week, copy the page, fix it up a bit and then import it into Access.

And since I only got around to updating once or twice a year, it was
a labor intensive process. But in the course of learning Python, it
became apparent that I could

- have Python scrape the web pages
- process the raw data
- do the database inserts

I never thought of those things when I started Python, but if you pay
attention to what you're "learning", these kind of things should
jump out at you.


From rschroev_nospam_ml at fastmail.fm  Mon May 19 09:30:52 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 19 May 2008 15:30:52 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <48314dd0$0$32138$426a34cc@news.free.fr>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <hifYj.43082$4B6.9014@newsfe14.ams2>

Bruno Desthuilliers schreef:
> 1/ being interpreted or compiled (for whatever definition of these 
> terms) is not a property of a language, but a property of an 
> implementation of a language.
> 
> 2/ actually, all known Python implementations compile to byte-code.
> 

You keep saying that, and in theory you're right. But I'm still inclined 
to disagree with it, since the practical reality is different. Python is 
indeed compiled to byte code, but if you compare that byte code with 
assembly code you'll see that there's a whole world of difference 
between the two, largely because of the dynamical nature of Python. Fact 
is that Python was designed from the start to run on a virtual machine, 
not on the native hardware.

C OTOH was designed to be compiled to assembly code (or directly to 
machine code) and as a result there are no (or virtually) no 
implementations that interpret C or compile it to bytecode.

I love Python, but IMHO it's a bit silly to maintain that the fact that 
Python compiles to byte code instead of assembly code/machine code is 
purely a matter of implementation; on the contrary, I believe it's a 
result of its design. I also think that there's a large difference 
between byte code and machine code (in Python's case; I haven't looked 
at other languages), and that it's a bit silly to try to trivialize that 
difference.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From duncan.booth at invalid.invalid  Thu May  1 03:36:21 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 07:36:21 GMT
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<74c070ce-1b8f-4746-9d1c-ac2227aaf515@y21g2000hsf.googlegroups.com>
Message-ID: <Xns9A9156C608E88duncanbooth@127.0.0.1>

George Sakkis <george.sakkis at gmail.com> wrote:

> On Apr 30, 5:06?am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> wrote:
>> Hall?chen!
>>
>> SL writes:
>> > "Gabriel Genellina" <gagsl-... at yahoo.com.ar> schreef in bericht
>> >news:mailman.365.1209541507.12834.python-list at python.org...
>>
>> >> En Wed, 30 Apr 2008 04:19:22 -0300, SL <n... at hao.com> escribi?: 
And
>> >> that's a very reasonable place to search; I think chr and ord are
>> >> builtin functions (and not str methods) just by an historical
>> >> accident. (Or is there any other reason? what's wrong with
>> >> "a".ord() or str.from_ordinal(65))?
>>
>> > yes when you know other OO languages you expect this. Anyone know
>> > why builtins were chosen? Just curious
>>
>> *Maybe* for aesthetical reasons. ?I find ord(c) more pleasent for
>> the eye. ?YMMV.
>>
>> The biggest ugliness though is ",".join(). ?No idea why this should
>> be better than join(list, separator=" "). ?
> 
> Seconded. While we're at it, a third optional 'encode=str' argument
> should be added, to the effect of:
> 
> def join(iterable, sep=' ', encode=str):
>     return sep.join(encode(x) for x in iterable)
> 
> I can't count the times I've been bitten by TypeErrors raised on
> ','.join(s) if s contains non-string objects; having to do
> ','.join(map(str,s)) or ','.join(str(x) for x in s) gets old fast.
> "Explicit is better than implicit" unless there is an obvious default.
> 
I'm afraid I don't agree with you on this. Most places where I use join 
I already know the type of the values being joined. In those few cases 
where I want to join non strings, or want to do some other processing on 
the values the generator comprehension is easy and has the advantage 
that I can use a more complex expression than a simple function call 
without having to wrap it in a lambda or otherwise contort things:

e.g. comma.join(x[1] for x in s)
vs.  comma.join(s, encode=operator.itemgetter(1))
or   comma.join(s, encode=lambda x: x[1])

Plus of course, you aren't going to be writing ','.join(str(x) for x in 
s) more than once in any given program before you extract it out to a 
function, are you?



From musiccomposition at gmail.com  Thu May 29 22:58:31 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Thu, 29 May 2008 19:58:31 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <dca9144b-9235-46af-ab91-17a5ccaf9aee@p25g2000hsf.googlegroups.com>

On May 27, 10:48 am, Sverker Nilsson <s... at sncs.se> wrote:
> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.
>
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it
>
> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.
>
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
>
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business

Do you have any idea how brilliant Guido is? The reason he's not here
tending to your Python war wounds is that he's busy making important
decisions on python-dev and python-3000. Maintaining a programming
language is like raising 50 very unruly children, and Guido has done
an excellent job.


From http  Wed May 21 11:43:40 2008
From: http (Paul Rubin)
Date: 21 May 2008 08:43:40 -0700
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<1%WYj.78116$%15.75349@bignews7.bellsouth.net>
Message-ID: <7xwslnzmqb.fsf@ruckus.brouhaha.com>

"inhahe" <inhahe at gmail.com> writes:
> i don't see anybody mentioning huffman encoding.  i think it just works per 
> byte, so it's not as tight as gzip or whatever.  but it sounds like it would 
> be easy to implement and wouldn't require any corpus-wide compression 
> information. except a character frequency count if you wanted to be optimal.

In principle you could do it over digraphs but I tried that once and
it didn't help much.  Basially -because- it doesn't use any
corpus-wide compression information, it doesn't compress anywhere near
as well as LZ, DMC, or whatever.


From jeffober at gmail.com  Thu May 22 08:10:42 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 22 May 2008 05:10:42 -0700 (PDT)
Subject: merging the global namespaces of two modules
References: <mailman.1469.1211449697.12834.python-list@python.org>
Message-ID: <cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>

Can you be more specific?  modA and modB don't import from each other
but both need to access objects in the global namespace of what
module?  The controlling application?  Or do you mean that, for
example, modA needs to access some functions in modB, but does not
have import statements to do so, and you want the controlling program
to do the imports for it?  If that is the case, that is bad
programming practice in Python.  Python is not C and you can't just
share header files :)

If you need to avoid recursive import conflicts, you can perform your
imports at the top of functions that use objects from another module.

Jeff
http://www.artfulcode.net


From yves at zioup.com  Fri May  9 11:11:20 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 15:11:20 GMT
Subject: slicing lists
In-Reply-To: <c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org>
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>
Message-ID: <sQZUj.125646$rd2.117530@pd7urf3no>

castironpi at gmail.com wrote:

> The only thing is, is there is another natural meaning to [a,b:c].
> 
> Counting grids on the diagonals, the rational set is well defined:
> 
> 0: 0, 0
> 1: 1, 0
> 2: 0, 1
> 3: 2, 0
> 4: 1, 1
> 5: 0, 2
> 6: 3, 0
> 7: 2, 1
> ...
> 
> Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined.  Thencefore,
> 
> a,b:c,d
> 
> is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].

I'm not sure what you mean here. Could you give me a simple piece of code to 
show an example ?


Yves.
http://www.SollerS.ca


From arituay at gmail.com  Fri May 16 16:03:51 2008
From: arituay at gmail.com (Chad Wilhite)
Date: Fri, 16 May 2008 16:03:51 -0400
Subject: IDE for Python
In-Reply-To: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
Message-ID: <3c50a9820805161303l5d3dcfd5q5c8a95a5f82cd880@mail.gmail.com>

On Fri, May 16, 2008 at 11:33 AM, Jonathan Barbero <
jonathan.barbero at gmail.com> wrote:

> Hi!
>
>  I?m newbie with Python and to learn it better I want to use a good IDE to
> concentrate on Python power. There is any IDE like Eclipse for Java for
> Python? If not, what is the best Python?s IDE for you?
>
>  Thanks,
>
>    Jonathan.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



Jonathan,
  PyDev is a Python plugin for Eclipse, here is a link to its SourceForge
site:

http://sourceforge.net/projects/pydev


Chad
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From tinnews at isbd.co.uk  Wed May 14 10:17:08 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 14 May 2008 14:17:08 GMT
Subject: Python libraries for iCalendar, which one to use?
Message-ID: <482af464$0$661$bed64819@news.gradwell.net>

I am about to try writing a little Python utility to extract some data
from an iCalendar file.  A quick Google search turns up two possible
libraries to use - vobject and "iCalendar package for Python".

First question - have I missed any other (better?) ones?

Second question - how do I choose which to use.  Do I just use the
obvious criteria like recent activity, has the methods I want etc. or
is there some place that assigns official/respectability to a library?

-- 
Chris Green


From castironpi at gmail.com  Tue May 13 09:02:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:02:13 -0700 (PDT)
Subject: I'm stuck in Python!
Message-ID: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>

Hi all.

I am trying to write to the Python newsgroup.  I doubt (aha, but
doubt) that I have come to the right place.  (Incoming "this"!)  Is
this the Python newsgroup?  I heard it was called comp.lang.python.
Now to repeat the subject line.  I'm stuck in Python.

Now that was fun.  I will also try to enumerate simple screen savers
(graphicals, graphiclizers).  It may be profitable on some non-bank-
breaking scale to compile the results.  Shall I proceed?  The risk is
"overunity", such that one person can't be at liberty to live, which
in some technical political arenas would be an "anarchy", but there
are sufficiently many of those that I will too.

Does anyone want such a list, or if not, is it at least fun and
recreational to make it?  The dollar would come along the lines of
PowerPoint (name (tm)), so it may be free to do it, very entertaining,
and peaceable.  (As the above would show, you would be free to
approach me to -buy-; I won't oversell.)  I like programming.  (And is
Guido getting his fair share?  I am prepared to share with him.)
Check in his name.

I want to try to ally with other programmers and make cool games, like
Tron, that one party can make games for on a console, such as live
obstacles, incl. tear-down, and certain people have to play from time
to time.  But you can't charge to do it, so it's a guaranteed game.
(That in virtue of that I'm typing.)  Advantages include microspacing
of time.  Very summer.

Resemblances would include Dungeons & Dragons with multi-host, or
multi-ref small-shooter sport-likers.  The real-time is definitely
attractive (duh).  As for voice, it's not clear it's the most
entertaining, but I just don't have a mic.

However, forseeing, I return with sailing, but that's in 3-space and
not even in code, as though we'd construct the Royal Navy and battle.
But I think we can keep it well.

Thing is, someone has to play it to keep a synch (keep from falling),
and tap-outs would have to live.

Side note: In political theory, this is known as the problem of
nominating a successor.  Would it stay afloat, even for long enough to
make it worth the negatives, yes which do include tear-down and fall,
invasion of privacy, and rights infrigement?

I code in Python (get the callbacks), but configurable servers could
spread the work out, using relays to put each person on each's own
turf to be a ref.  If you feed the roles, it could get really fun, and
c-l-py is the appropriate place to start such a thing, both and ask if
it's been done before.


From inhahe at gmail.com  Sun May 18 11:41:31 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 11:41:31 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
Message-ID: <K5YXj.11407$hv2.2783@bignews5.bellsouth.net>

>
> Both the responses offer lambda free alternatives. That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree. So what applications are lambdas suited to? I
> think the parameterised function model is one.
> What else?

i've hardly ever used lambdas since map() and filter() were replaced by list 
comprehension.  two other uses I can think of for it are: using it as a 
sorting key (which takes a function and lambdas are perfect for that when a 
direct function isn't available. for example, lambda x: x.myName), and I 
made an irc bot once that certain events had a list of fuctions that would 
be called after that event.  it was like being able to dynamically add and 
remove event handlers.  for example what if you asked the user a question 
and you wanted to know for the next input whether it was from that user and 
was an answer to that question.  sometimes the function to add would be very 
simple, so writing a def for it would just be ugly. 




From casey.mcginty at gmail.com  Thu May 15 16:21:44 2008
From: casey.mcginty at gmail.com (Casey)
Date: Thu, 15 May 2008 13:21:44 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
Message-ID: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>

Hi,

I have some classes that print variable outputs depending on their
internal state, like so:

def __str__(self):
    out = []
    if self.opt1: out += ['option 1 is %s' % self.opt1']
    if self.opt2: out += ['option 2 is %s' % self.opt2']
    ....
    return '\n'.join(out)

Is there any way to make this cleaner?


From aspersieman at gmail.com  Mon May 26 05:41:26 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 26 May 2008 11:41:26 +0200
Subject: IOError in windows service
Message-ID: <483A85C6.20803@gmail.com>

Hi all

I have a script (attached) that creates a windows service. Basically the 
service periodically runs a program 'program.exe'. This all works fine, 
but during testing I discovered that if I include any 'print' statements 
(used to debug the service when its run in 'debug' mode), when _not_ in 
debug mode, it throws an error:

<error>
The instance's SvcRun() method failed
  File "C:\Python25\Lib\site-packages\win32\lib\win32serviceutil.py", 
line 785, in SvcRun
    self.SvcDoRun()
  File "C:\Program Files\Program\MyService.py", line 28, in SvcDoRun
    print "Entering while loop..."
<type 'exceptions.IOError'>: (9, 'Bad file descriptor')
</error>

I have removed the 'print' statements, after which the service runs 
fine, but was just curious to find out the reason for this error.

Regards

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 


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From skanemupp at yahoo.se  Thu May 15 13:07:39 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 10:07:39 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com> 
	<6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com>
Message-ID: <de23bd7f-75fb-4cfb-bbc0-14dc469ef6ce@k37g2000hsf.googlegroups.com>

On 15 Maj, 19:04, globalrev <skanem... at yahoo.se> wrote:
> when i try to write to the file...
>
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
> <module>
>     d.write('hej du galne kock')
> IOError: [Errno 0] Error

damn i take a break lol.

r+ ldo when open file so i CAN write to it...


From castironpi at gmail.com  Wed May 14 19:34:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:34:29 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com> 
	<d100fada-097c-49cb-8eb8-c56344245ea5@24g2000hsh.googlegroups.com>
Message-ID: <dc0b7fb4-f2df-4cd8-aaca-f64b3e267e38@l64g2000hse.googlegroups.com>

On May 14, 6:21?pm, castiro... at gmail.com wrote:
> On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
>
> > >?Should tuples be named?
>
> > Yes.
>
> Good; they're named sequences.

Can anyone make sling-shots of words?  What's the splatter?


From arnodel at googlemail.com  Fri May 30 04:03:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 30 May 2008 09:03:32 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
Message-ID: <m2od6ob4mj.fsf@googlemail.com>

Alan Isaac <aisaac at american.edu> writes:

> This thread raises two questions for me.
>
> 1. I take it from this thread that in Python 3 the following are
> equivalent:
>
>        class Test: pass
>
>        class Test(object): pass
>
> Is that correct, and if so, where is it stated explicitly?
> (I know about the "all classes are new style classes" statement.)

I don't know where it is stated, but how could they *not* be
equivalent?

> 2. I take it from this thread that in Python 2.2+ if I put the
> following at the top of a module ::
>
>        __metaclass__ = type
>
> then all the classes defined in that module will be newstyle
> classes.  Is that correct?  Somehow I did not grok that from
>
> <URL:http://docs.python.org/ref/metaclasses.html>
>
> but it seems right.

>From the URL you quote:

    The appropriate metaclass is determined by the following
    precedence rules:

    * If dict['__metaclass__'] exists, it is used.

    * Otherwise, if there is at least one base class, its metaclass is
      used (this looks for a __class__ attribute first and if not
      found, uses its type).

    * Otherwise, if a global variable named __metaclass__ exists, it
      is used.

    * Otherwise, the old-style, classic metaclass (types.ClassType) is
      used.

Look at the third point.

-- 
Arnaud


From vivainio at gmail.com  Sun May 25 07:31:50 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 25 May 2008 11:31:50 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
	<Xns9AA96A134C3B6duncanbooth@127.0.0.1>
Message-ID: <87prra39hz.fsf@gmail.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:


> Or if you code in C++ and they *really* need to get at something you
> made private they will still get at it. I've been there and done
> that: 'private' in languages which have it is rarely an advantage
> and frequently a pain.

Indeed. In C++, they recommend the "pimpl idiom" (private
implementation), which actually has real advantages ;-)



From hat at se-162.se.wtb.tue.nl  Thu May 22 09:51:35 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 22 May 2008 15:51:35 +0200
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
Message-ID: <slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>

On 2008-05-22, s0suk3 at gmail.com <s0suk3 at gmail.com> wrote:
> Hi, I wanted to know how cautious it is to do something like:
>
> f = file("filename", "rb")
> f.read()
>
> for a possibly huge file. When calling f.read(), and not doing
> anything with the return value, what is Python doing internally? Is it
> loading the content of the file into memory (regardless of whether it
> is discarding it immediately)?

I am not a Python interpreter developer, but as user, yes I'd expect that to
happen. The method doesn't know you are not doing anything with its return
value.

> In my case, what I'm doing is sending the return value through a
> socket:
>
> sock.send(f.read())
>
> Is that gonna make a difference (memory-wise)? I guess I'm just
> concerned with whether I can do a file.read() for any file in the
> system in an efficient and memory-kind way, and with low overhead in
> general. (For one thing, I'm not loading the contents into a
> variable.)

Doesn't matter. You allocate a string in which the contents is loaded (the
return value of 'f.read()', and you hand over (a reference to) that string to
the 'send()' method.

Note that memory is allocated by data *values*, not by *variables* in Python
(they are merely references to values).

> Not that I'm saying that loading a huge file into memory will horribly
> crash the system, but it's good to try to program in the safest way
> possibly. For example, if you try something like this in the

Depends on your system, and your biggest file.

At a 32 bit platform, anything bigger than about 4GB (usually already at around
3GB) will crash the program for the simple reason that you are running out of
address space to store bytes in.


To fix, read and write blocks by specifying a block-size in the 'read()' call.

Sincerely,
Albert


From grante at visi.com  Sat May 10 18:57:20 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 10 May 2008 17:57:20 -0500
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>

On 2008-05-10, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

>> These are the minute details that bedevil the poor noob.  I've
>> read dozens of tutorials on different prog langs and have
>> never read a single thing on white space or blank lines
>> preceding a shebang.  Till now.  I always get
>
> 	Well... The "shebang" line is OS and shell specific

The "#!" is sort of a holdover from the "magic number" used
back in the day on Unix systems. Traditionally, the type of an
executable file on Unix systems was determined by a "magic
number" that was read from the first two bytes of a file:

  http://en.wikipedia.org/wiki/Magic_number_(programming)

Back then there was a text file somewhere that listed the
various 16-bit values and what they meant.  The "file" program
used that list to guess what a file was. It's gotten
considerably more complex since then, and the "magic" file has
syntax to specify fairly large/complex patterns that are used
to determine file types.  If you're curious, there's probably a
"magic" file somewhere on your system.  On Gentoo it's at
/usr/share/misc/file/magic, 
  
On a Linux system (and I presume on other Unixes), the kernel
itself (if built with the proper options) knows know how start
a "script" file that starts with the characters "#!".  When the
kernel is told to execute a file whose first two bytes are "#!"
(0x32,0x21), it knows to read the newline terminated path of an
executable starting at the byte following the "!" (the third
byte in the file).  The kernel then executes that file,
appending the name of the original "script" file to the argv
list.

-- 
Grant Edwards                   grante             Yow! My mind is making
                                  at               ashtrays in Dayton ...
                               visi.com            


From ocollioud at gmail.com  Fri May 16 04:23:59 2008
From: ocollioud at gmail.com (olive)
Date: Fri, 16 May 2008 01:23:59 -0700 (PDT)
Subject: how to set python hosting !
References: <ef823a8f-9cb7-4e39-b9ad-e08754eb5ec5@n1g2000prb.googlegroups.com>
Message-ID: <aece52b1-679e-4f5b-9066-b1450c3f6100@k37g2000hsf.googlegroups.com>

On May 16, 9:16 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i do have some basic python know-how. i want to tryout by actually
> implementing some python generated dynamic page etc.
>
> i am having websetup which runs with mysql on linux, and pythong is
> installed on it.
>
> so is there any ref. from where i can know how to configure my
> webserver for python.
>
> -Raxit
Hi,
see http://www.wsgi.org/wsgi
hth


From nick at craig-wood.com  Thu May 22 11:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 10:30:07 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>

Dave Parker <daveparker at flamingthunder.com> wrote:
>  But after getting input from children and teachers, etc, it started
>  feeling right.
> 
>  For example, consider the two statements:
> 
>       x = 8
>       x = 10
> 
>  The reaction from most math teachers (and kids) was "one of those is
>  wrong because x can't equal 2 different things at the same time".

This is a common feature in functional languages...

Eg

Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
[async-threads:0] [kernel-poll:false]

Eshell V5.6.2  (abort with ^G)
1> X = 8.
8
2> X = 10.
** exception error: no match of right hand side value 10
3>

That error message is the erlang interpreter saying "Hey I know X is
8, and you've said it is 10 - that can't be right", which is pretty
much what math teachers say too...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From matthieu.brucher at gmail.com  Sat May 17 17:35:53 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sat, 17 May 2008 23:35:53 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <g0nhaf$ee7$1@ger.gmane.org>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<g0nhaf$ee7$1@ger.gmane.org>
Message-ID: <e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>

2008/5/17 Christian Heimes <lists at cheimes.de>:

> Matthieu Brucher schrieb:
> > Hi,
> >
> > I did not manage to build extension with distutils with Python compiled
> with
> > VS different than 2003. The need for 2003 was hard-coded in distutils.
> > You can try building extensions with VS2008 with Scons. This is what I do
> a
> > lot, and everything works fine as long as the interface does not use
> > standard structures (like FILE, custom structures are fine) or objects
> > allocated in the extension is freed in the extension.
>
> Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
> officially supported.


Even if you compile Python 2.5 with VS2008, VS2003 is used for the
extensions, AFAIR. I didn't try Python 2.6 because I only have Visual C++
Express 2008.

You can compile extensions with a different version of MS VC but it can
> get you in a lot of trouble. Every version of the VS Compiler uses its
> own C Runtime Library (MSVCRT). You can't share some resources like
> allocated memory and FILE* objects between MSVCRTs.


I don't see your point, that's what I wrote...

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From bob at passcal.nmt.edu  Tue May 20 15:18:08 2008
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Tue, 20 May 2008 13:18:08 -0600
Subject: List of disk drives on Windows?
Message-ID: <2008052013180816807-bob@passcalnmtedu>

This MUST have been asked before, but I can't seem to Google the right 
thing. ?How can I get a list of drives on a Windows box, like ["C:\", 
"D:\"], like I can if I do something like listdir("/Volumes") on a Mac?

Thanks!

Bob



From badmuthahubbard at gmail.com  Thu May  8 17:17:18 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Fri, 9 May 2008 00:17:18 +0300
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
In-Reply-To: <88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
	<88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
Message-ID: <8200bab70805081417t4cfdcb0dqe8561b5fd83dccf5@mail.gmail.com>

:'(
I'm confused

On Fri, May 9, 2008 at 12:03 AM, offby1 <eric.hanchrow at gmail.com> wrote:
> Ah.  So from the point of view of mut.py, "thing" and "system.thing"
> are separate, unrelated variables; the former of which is initialized
> from the latter when mut says "from system import thing".   Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From arnodel at googlemail.com  Sun May 18 09:40:52 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 18 May 2008 14:40:52 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
Message-ID: <m2ve1b7msb.fsf@googlemail.com>

Lie <Lie.1296 at gmail.com> writes:

> Lambda can actually be safely removed from python and no other
> features would be missing. It is always possible to create a def
> version of any lambda, so lambda is useless. It is just a convenience
> for the times where we're just too lazy to invent a name and find a
> place to place the def, instead just inlining the function.

Note that the same thing can be said about generator expressions,
which are nothing more than anonymous, non-reusable, generator
functions.  Instead these were _added_ to the language!

-- 
Arnaud


From johnjsal at NOSPAMgmail.com  Mon May 12 23:40:11 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:40:11 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<_w%Vj.9941$Qw5.889@fe107.usenetserver.com>
Message-ID: <48290d9a$0$11626$607ed4bc@cv.net>

notbob wrote:

> On 2008-05-12, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>
>> language, I can't help but feel that I will be mostly unable to use what I 
>> learn simply because I have no reason to use it.
>
>> The *process* of learning is enough fun for me, and every now and then I do 
>> find a small use for Python that really pays off,
>
> You're contradicting yourself.  Which is it?  You can or can't use it?  
>
> I suspect the more you learn of it, the more you will be able to do with it.  I
> hope so, as I'm just doing it now, like you, for the sake of learning.  

I just meant that over the couple of years that I've been studying it,
I've had a real occasion to use it maybe three or four times. For the
most part, I don't use it regularly enough (which is why I'm in the
process of re-learning some of it, because it's been so long since I
used it).


From zephyrfalcon!NO_SPAM! at gmail.com  Thu May 29 22:14:25 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Thu, 29 May 2008 22:14:25 -0400
Subject: Code execution in imported modules
In-Reply-To: <mailman.1757.1212108231.12834.python-list@python.org>
References: <mailman.1757.1212108231.12834.python-list@python.org>
Message-ID: <0oJ%j.15824$Kk3.14125@bignews9.bellsouth.net>

Eric Wertman wrote:
> So I'm working on some file parsing and building up a stack of regular
> expressions that I need to use.  I was thinking of dropping them in an
> external module.  I was wondering.. if I put them in a file called
> regex.py like so :
> 
> import re
> 
> re1 = "..
> re2 = "..
> 
> and then do:
> 
> rgx1 = re.compile(re1)
> rgx2 = re.compile(re2)
> 
> 
> and, in my script, parse.py py I do:
> 
> from regex import *
> 
> text = "bunch of stuff......."
> 
> m = rgx1.search(text)
> 
> 
> Does the re get compiled when I import it, or every time I call it?
> Since I'm calling it often, I'd like to compile it once.

It is compiled when you import the module.

-- 
Hans Nowak (zephyrfalcon at gmail dot com)
http://4.flowsnake.org/


From kyosohma at gmail.com  Mon May 19 10:10:57 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 07:10:57 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: 20080518182022.990193bd.johnjsal@NOSPAMgmail.com
Message-ID: <3e7fa0d6-c8a4-4149-8fb7-b15f5e20414d@k37g2000hsf.googlegroups.com>

On May 18, 5:20?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Most of my non-GUI stuff is login scripts and registry editing. I also
have some scripts that can install various programs silently, such as
Adobe Reader or Firefox. This is for work purposes as we have a
specific set of applications that need to be installed on each
machine.

Mike


From castironpi at gmail.com  Tue May 13 07:31:04 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:31:04 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
Message-ID: <537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>

On May 13, 5:47?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:06:09 -0300, gsal <salger... at gmail.com> escribi?:
>
> > There does not seem to be a valid url for the Installer, anywhere.
> > Could anyone provide me with a copy of it?
>
> I think py2exe is its successor:http://www.py2exe.org/
>
> --
> Gabriel Genellina

I actually thought 'copy' was a banned word.  I don't have one, but I
can.  I.e., cutting and pasting code is working fine currently.  I
just got two editors!


From geoffrey.clementsNO at SPAMbaesystems.com  Thu May 15 08:10:25 2008
From: geoffrey.clementsNO at SPAMbaesystems.com (Geoffrey Clements)
Date: Thu, 15 May 2008 13:10:25 +0100
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
Message-ID: <482c2424$1_1@glkas0286.greenlnk.net>

"urikaluzhny" <ukaluzhny at nds.com> wrote in message 
news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> | It seems that I rather frequently need a list or iterator of the form
> | [x for x in <> while <>]
>
> I can think of two ways to interpret that.
>> I mean like [x for x in <A> if <B>], only that it breaks the loop when
>> the expression <B> is false.

def gen(a):
    for x in a:
        if B: break
        yield x

a_gen = gen(A)

# now iterate over a_gen

-- 
Geoff 




From ZeeGeek at gmail.com  Tue May 20 12:31:27 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Tue, 20 May 2008 09:31:27 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
Message-ID: <0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>

On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
>
> > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
>
> > > > Hi, what's the default localedir for gettext module on windows? In
> > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > order to make the translation work?
>
> > > %PYTHONHOME%\share\locale
>
> > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > use:
>
> > import gettext
> > gettext.install('testprogram', unicode = True)
>
> The syntax is correct. Is the test program localised under Linux or
> Cygwin? If not then the error is somewhere in your application.

Yes, it's localized under linux.

> How did you try to set the language on Windows? It works for me on Vista
> with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> correctly).

I'm using Simplified Chinese Windows, so I didn't set anything
specifically before firing up the program. I found that if I use
gettext.GNUTranslations to read in the .mo file, then it's localized.
But gettext.install doesn't work.


From fc14301589 at icqmail.com  Sat May 31 14:52:35 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sun, 01 Jun 2008 02:52:35 +0800
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
	<2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
Message-ID: <48419e73_2@news.tm.net.my>

On 22:01, sabato 31 maggio 2008 globalrev wrote:

> also, lets say i want to send a SMS to my own phone from the internet.
> how would i do that?

IMO, nowadays free SMS sending, via internet, is gone. There should be the
chance from one's own subscribed network.
-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From inhahe at gmail.com  Fri May 16 14:08:40 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 14:08:40 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net><mailman.1232.1210952591.12834.python-list@python.org><kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
	<mailman.1236.1210959884.12834.python-list@python.org>
Message-ID: <a4kXj.142757$Er2.127823@bignews6.bellsouth.net>


"Dan Upton" <upton at virginia.edu> wrote in message 
news:mailman.1236.1210959884.12834.python-list at python.org...


>
> On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>>
>> Why wouldn't the compilers support it? It's part of the x86
>> architexture,
>> isn't it?
>
> Yeah, but I don't know if it uses it by default, and my guess is it
> depends on how the compiler back end goes about optimizing the code
> for whether it will see data access/computation patterns amenable to
> SIMD.

perhaps you explicitly use them with some extended syntax or something?




From castironpi at gmail.com  Thu May  8 20:21:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:21:24 -0700 (PDT)
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com> 
	<JGIUj.52528$Bb3.41853@trnddc01> <k5i4cyb3.fsf@gmail.com>
	<WGKUj.8780$0L.8138@trnddc07>
Message-ID: <f6863ebf-308f-4c15-bc8a-84a4183ab884@r66g2000hsg.googlegroups.com>

On May 8, 4:57?pm, Alan Isaac <ais... at american.edu> wrote:
> Ville M. Vainio wrote:
> > in case of stocks, you are probably monitoring several
> > stock objects, so the stock should probably pass itself to
> > the observer
>
> OK. ?This is related to my question #2 (in a separate
>
> thread), where I'd also appreciate your comments.
>
> > analogous to a typical UI scenario where you have several
> > widgets forwarding events to one big observer - and they
> > *do* provide the event source and event type.
>
> That is a helpful comparison.
>
> > All in all, though, the right solution should be obvious
> > from the problem at hand.
>
> For CS types, maybe. ?The rest of us are just trying to get
>
> things done without as much background and context.
>
> Thanks,
>
> Alan

My local vernacular calls them "carfulls" of people, which analogy to
the body of collective man, extends pretty far.

It's not the gas pedal we hate!  I'm schedule more coasting on shore.


From wizzardx at gmail.com  Sun May  4 03:32:57 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 09:32:57 +0200
Subject: Script Optimization
In-Reply-To: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
Message-ID: <18c1e6480805040032u6450bf34wc5ca9ea6c81da56@mail.gmail.com>

>  It's too long to post here (160 lines) so here's the link:
>  http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
>  (if that doesn't work: http://uppit.com/CKOYHE)
>
>  Thanks in advance,
>  lev

Neither link works for me. I get an error page "Error: invalid
download linnk". How about you send it to the list as an attachment?

David.


From gherron at islandtraining.com  Tue May 13 18:25:16 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 15:25:16 -0700
Subject: What is  self.file = file  for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <482A154C.1030204@islandtraining.com>

wxPythoner at gmail.com wrote:
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
>     """Print and number lines in a text file."""
>     def __init__(self, file):
>         self.file = file
>         .
>         .
>         .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

If you know about Object-Oriented Programming this should make sense.  
If you don't, then you have some reading/learning to do first.

When someone wants to create an object of type TextReader, they must 
supply a value
   ob = TextReader(v)
That calls the __init__ constructor with the supplied value of v in the 
variable named file.
If the object being created wants to record the value for future use, 
then the line
  self.file = file
does just that.   "self" is the name of the object being created, 
"self.file" is an attribute named "file" of that object, and the 
assignment stores the supplied value there.

Gary Herron




From workitharder at gmail.com  Fri May 23 12:36:44 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 09:36:44 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
Message-ID: <46602e24-0285-4667-b09a-8f7ce7509f71@b5g2000pri.googlegroups.com>

On May 23, 3:29?am, "inhahe" <inh... at gmail.com> wrote:
> "inhahe" <inh... at gmail.com> wrote in message
>
> news:MKwZj.2749$772.668 at bignews2.bellsouth.net...
>
> > if we assume the constraints are that:
> > 1.he has list, l
> > 2.he has a dictionary, d
> > 3.he wants the function to print the values in the dictionary according to
> > a specific order of their keys as defined by the function, followed by the
> > values of the list
>
> It's also possible (even likely) that he knows outside of the function what
> order he wants the values in, and only used an (incidentally) unordered dict
> called kwargs because he thought that's the only way to pass to those
> parameters. ?in which case the function could be left untouched and the he
> would call it like this:
>
> args = [1,2,3]
> f(*args)
> or
> f(*[1,2,3])

You're actually pretty dead-on here. I preferred the keyword approach
because printing it showed an explicit assignment of arguments, but it
looks like I'll have to use a list if there's an *argv argument, since
there's no way to assign it with keywords, and no (working) way to use
them together.

def f(a, *args): print a, args
args = [2, 3]
kwargs = {'a':1}

f(*args, **kwargs)
TypeError: f() got multiple values for keyword argument 'a'

kwargs['args'] = args
f(**kwargs)
TypeError: f() got an unexpected keyword argument 'args'


From grante at visi.com  Mon May 12 10:44:58 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:44:58 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au>
Message-ID: <lI6dnUZf8M53yrXVnZ2dnUVZ_gKdnZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

I too, agree that requiring a name be bound to the values
coming out of the iterator seems "wrong".

> With "do something N times", there must be *something* to keep track
> of which iteration we're up to (or, equivalently, how many iterations
> remain) at a given moment. A Python iterator seems a fine choice to
> hold that information, and better than many alternatives.

An iterator like xrange() is an excellent choice. But, since
the iterator contains that information, why require that that
value be "exported" by the iterator and bound to an externally
visible name?  In the case in question, the only thing you need
from the iterator is the StopIteration exception.  To me,
exposing the internal state of the iterator and requiring that
the user bind a name to it each time through the loop feels
we're like driving a nail with a screwdriver.

-- 
Grant Edwards                   grante             Yow! Was my SOY LOAF left
                                  at               out in th'RAIN?  It tastes
                               visi.com            REAL GOOD!!


From bj_666 at gmx.net  Tue May 20 14:13:08 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 18:13:08 GMT
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
	<g0v2vs$38b$01$1@news.t-online.com> <483311EB.1040307@gmail.com>
Message-ID: <69gilkF30tko7U1@mid.uni-berlin.de>

On Tue, 20 May 2008 23:31:15 +0530, Nikhil wrote:

> Peter Otten wrote:
>> Nikhil wrote:
>> 
>>> I have recently written a small module. When I import the module, I
>>> always get the error
>>>
>>>
>>> only when I do
>>>
>>>  >>> from local.my.module import *
>>>
>>> --
>>> Traceback (most recent call last):
>>>    File "<stdin>", line 1, in <module>
>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>> ---
>>>
>>>
>>> but when I do the below, I do not get any error.
>>>
>>> --
>>>  >> import local.my.module
>>>  >>
>>> --
>>>
>>> Any ideas on what could be wrong?
>> 
>> Are you abusing the __all__ attribute?
>> 
>> $ cat tmp.py
>> __all__ = ['/xyz/py/file']
>> 
>> $ python -c "from tmp import *"
>> Traceback (most recent call last):
>>   File "<string>", line 1, in <module>
>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>> 
>
> Yes, I am. Is there any reason not to?

That your module raises the `AttributeError` and is broke is not reason
enough!?  :-)

> basically, since this is implemented in the module, I have to export it 
> since the caller to the function in the module is responsible for 
> ensuring he has enough proper permissions to read the file.

What do you mean by "implemented in the module"?  `__all__` is for names
that live in the module's namespace -- '/xyz/py/file' isn't even a legal
identifier name in Python!

Ciao,
	Marc 'BlackJack' Rintsch.


From exarkun at divmod.com  Tue May  6 12:35:26 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 6 May 2008 12:35:26 -0400
Subject: select.poll() and WSAPoll
In-Reply-To: <ef9a170d-5b87-4ec0-9d7d-67b8d1057083@t54g2000hsg.googlegroups.com>
Message-ID: <20080506163526.6859.2102154164.divmod.quotient.59595@ohm>

On Tue, 6 May 2008 08:44:36 -0700 (PDT), Giles Brown <giles_brown at hotmail.com> wrote:
>On 6 May, 14:18, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Tue, 6 May 2008 08:36:28 -0400, inhahe <inh... at gmail.com> wrote:
>> >select.poll isn't supported on Windows, because Windows doesn't have such a
>> >feature, or at least it didn't until Vista.  Vista implements the same thing
>> >but called  WSAPoll, an article is here
>> >http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
>> >I hope that the next edition of Python supports select.poll on Vista, or at
>> >least that someone writes a third-party module fo it. As much as I'd love to
>> >do it myself, it's probably beyond me.. i've never used poll before nor
>> >written a Python extension.  also, i don't have Vista.
>> >Thanks
>>
>> If you use Twisted, then you can use I/O Completion Ports, which are even
>> better than WSAPoll, and your code will also work with KQueue on BSD or
>> EPoll on Linux without any changes. :)
>>
>> Jean-Paul
>
>The current docs describe the I/O Completion Ports reactor as
>"extremely experimental".
>
>http://twistedmatrix.com/projects/core/documentation/howto/choosing-reactor.html#auto8
>
>Is that overly conservative or is it as bleeding edge as it sounds?
>
>(IIRC there have been caveats like this on the Windows reactors for
>a while)

With the most recent release, the IOCP reactor is in much better shape than
it ever has been before.  It's not perfect, but it fails fewer than 10 unit
tests from the Twisted suite (of almost 4300).  The goal, of course, is for
it to fail none of them. ;)  It's possible we'll get there for a release in
the not too distant future.

The current results of the test suite are available at this extremely pretty
URL:

http://buildbot.twistedmatrix.com/waterfall?builder=win32-py2.4-iocp&builder=winxp32-py2.5-iocp&builder=vista-py2.5-iocp&builder=server-2k8-x86-py2.5-iocp&branch=trunk

So I'd call it "almost working" rather than "extremely experimental" at this
point.  Thanks for bringing this up, we should probably adjust our docs. :)

Jean-Paul


From b0bm00r3 at gmail.com  Sun May 11 02:45:00 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:45:00 -0700 (PDT)
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
	<7xbq3dfj0c.fsf@ruckus.brouhaha.com>
Message-ID: <5cc8c484-a252-4cc2-b432-3ba13a064385@m44g2000hsc.googlegroups.com>

On May 11, 2:32 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> philly_bob <b0bm0... at gmail.com> writes:
> > algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
> > accs=[]
> > for alg in algs:
> >    thisacc=getattr(alg.accuracy)()   # picked this technique on
> > comp.lang.python last month
> >    accs.append(thisacc)
>
> I think what you mean is (untested):
>
>      algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
>      accs = sorted(((alg.accuracy(), alg.name()) for alg in algs),
>                    reverse=True)
>      for i,(alg_acc, alg_name) in enumerate(accs):
>         print '%2d %5s %0.2f'% (i, alg_name, alg_acc)
>
> This assumes a method alg.name() which tells you the name of the
> algorithm.  I don't understand how you're converting the string 'AlgA'
> to an algorithm object in your example above.

The technique is described in this thread:

http://groups.google.com/group/comp.lang.python/browse_frm/thread/ed652ba2fab47a6f/489f1746210e83b9?lnk=st&q=b0bm00r3#489f1746210e83b9

I've barely mastered it, but it does work.

Bob=


From bruno.desthuilliers at gmail.com  Wed May  7 18:27:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:27:58 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com>
Message-ID: <35e4c5fb-d09f-492d-a165-f03be93ff465@8g2000hse.googlegroups.com>

On 7 mai, 23:51, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
(snip)

Small improvement thanks to Paul Rubin:

from collections import defaultdict
from operator import itemgetter

def get_letters_frequency(source):
    letters_count = defaultdict(int)
    for letter in source:
        letters_count[letter] += 1
      return sorted(
          letters_count.iteritems(),
          key=itemgetter(1),
          reverse=True
       )



From pupeno at pupeno.com  Fri May 16 17:53:03 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Fri, 16 May 2008 14:53:03 -0700 (PDT)
Subject: Getting elements and text with lxml
Message-ID: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>

Hello,

I have an XML file that starts with:

<vortaro>
<art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
<kap>
  <ofc>*</ofc>-<rad>a</rad>
</kap>

out of it, I'd like to extract something like (I'm just showing one
structure, any structure as long as all data is there is fine):

[("ofc", "*"), "-", ("rad", "a")]

How can I do it? I managed to get the content of boths tags and the
text up to the first tag ("\n   "), but not the - (and in other XML
files, there's more text outside the elements).

Thanks.


From castironpi at gmail.com  Fri May 16 18:19:03 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:19:03 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com> 
	<AknXj.46809$3v1.1644@bignews3.bellsouth.net>
Message-ID: <85961d8b-5055-47a4-b5c1-55bee7460dd8@24g2000hsh.googlegroups.com>

On May 16, 4:51?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> bruno.desthuilli... at gmail.com wrote:
> > On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
> > <bruno.desthuilli... at gmail.com> wrote:
> >> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>
> >>> Dan Upton wrote:
> >>>> for pid in procs_dict:
> > (snip)
> >>> ? ?for pid in procs_dict.keys():
> >> I'm afraid this will do the same exact thing. A for loop on a dict
> >> iterates over the dict keys, so both statements are strictly
> >> equivalent from a practical POV.
>
> > Hem. Forget it. I should think twice before posting - this will
> > obviously make a big difference here. ?Sorry for the noise.
>
> :-) ?It appears that you would be right if this was Python 3.0, though:
>
> Python 3.0a5 (r30a5:62856, May 16 2008, 11:43:33)
> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> ?>>> d = {1: 2, 3: 4, 5: 6}
> ?>>> for i in d.keys(): del d[i]
> ...
> Traceback (most recent call last):
> ? ?File "<stdin>", line 1, in <module>
> RuntimeError: dictionary changed size during iteration
>
> Maybe 'for i in d' and 'for i in d.keys()' *are* functionally equivalent in 3.0,
> as d.keys() returns an object that iterates over d's keys... but I haven't read
> enough about it yet to be sure. ?In any case, the problem goes away when we
> force a list:
>
> ?>>> d = {1: 2, 3: 4, 5: 6}
> ?>>> for i in list(d.keys()): del d[i]
> ...
> ?>>> d
> {}
>
> --Hans- Hide quoted text -
>
> - Show quoted text -

You may be searching for:

for i in d.keys()[:]:
   del d[ i ]



From tgrav at mac.com  Thu May 29 11:02:25 2008
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 29 May 2008 11:02:25 -0400
Subject: mysqldb install problem
Message-ID: <58C1F8D5-DB1C-4598-B124-92FBC2B07041@mac.com>

I am trying to install mysqldb-1.2.2 on my PPC running 10.5.2 and  
Activepython 2.5.1.1
when I get this error:

running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.3-fat-2.5/MySQLdb
running build_ext
building '_mysql' extension
gcc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing - 
Wno-long-double -no-cpp-precomp -mno-fused-madd -fPIC -fno-common - 
dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes - 
Dversion_info=(1,2,2,'final',0) -D__version__=1.2.2 -I/usr/local/mysql/ 
include -I/Library/Frameworks/Python.framework/Versions/2.5/include/ 
python2.5 -c _mysql.c -o build/temp.macosx-10.3-fat-2.5/_mysql.o -g - 
Os -arch ppc64 -fno-common -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE  
-DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT - 
DDONT_DECLARE_CXA_PURE_VIRTUAL
In file included from /Library/Frameworks/Python.framework/Versions/ 
2.5/include/python2.5/Python.h:57,
                  from pymemcompat.h:10,
                  from _mysql.c:29:
/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/ 
pyport.h:734:2: error: #error "LONG_BIT definition appears wrong for  
platform (bad gcc/glibc config?)."
In file included from _mysql.c:35:
/usr/local/mysql/include/my_config.h:1095:1: warning: "SIZEOF_LONG"  
redefined
In file included from /Library/Frameworks/Python.framework/Versions/ 
2.5/include/python2.5/Python.h:8,
                  from pymemcompat.h:10,
                  from _mysql.c:29:
/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/ 
pyconfig.h:807:1: warning: this is the location of the previous  
definition
error: command 'gcc' failed with exit status 1

Anyone know what is going on?

Cheers
   Tommy


From duncan.booth at invalid.invalid  Mon May  5 04:37:07 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 May 2008 08:37:07 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
Message-ID: <Xns9A956087CF47Aduncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Sun, 04 May 2008 12:58:25 -0300, Duncan Booth
> <duncan.booth at invalid.invalid> escribi?: 
> 
>> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>>
>>> I thought that it would be very nice if the built-in sum() function
>>> used this algorithm by default.  Has this been brought up before? 
>>> Would this have any disadvantages (apart from a slight performance
>>> impact, but Python is a high-level language anyway ...)?
>>
>> There's a thread you might find interesting:
>>
>> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9
>> eda29faf92f532e/027cef7d4429aa3a 
>>
>> In that thread I suggested that Python ought to implement sum by
>> adding together each pair of values, then each pair of results and so
>> on. This means that for input values of a similar magnitude the
>> intermediate results stay balanced. The implementation doesn't
>> actually do all the first level 
> 
> Python doesn't require __add__ to be associative, so this should not
> be used as a general sum replacement. But if you know that you're
> adding floating point numbers you can use whatever algorithm best fits
> you. Or use numpy arrays; I think they implement Kahan summation or a
> similar algorithm. 
> 
Yes, my argument is more along the line that it should have been 
implemented that way in the first place, but changing things now would 
require time machine intervention. :)




From bignose+hates-spam at benfinney.id.au  Fri May  2 10:44:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:44:00 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
Message-ID: <877ieczryn.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 23:30:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > The OP was asking why people prefer on over the other. My answer
> > is that I prefer specifying "give me the default OS Python"
> > because anything not installed by the OS is [too] non-standardised
> > for me to worry about.
> 
> As someone else pointed out, not all the world is Linux.

It's a good thing I've never implied such to be the case.

-- 
 \         "If nature has made any one thing less susceptible than all |
  `\    others of exclusive property, it is the action of the thinking |
_o__)                       power called an idea"  -- Thomas Jefferson |
Ben Finney


From artyprog at gmail.com  Wed May 21 03:56:17 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Wed, 21 May 2008 09:56:17 +0200
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
Message-ID: <4833d5a2$0$839$ba4acef3@news.orange.fr>

Thanks all of you

Regards

Salvatore 




From hat at se-162.se.wtb.tue.nl  Thu May 29 03:22:29 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 29 May 2008 09:22:29 +0200
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <slrng3smdl.o6t.hat@se-162.se.wtb.tue.nl>

On 2008-05-29, lixinyi.23 at gmail.com <lixinyi.23 at gmail.com> wrote:
> Hi!
>
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.

ok, although I personally favor the style of writing and running a
script/program, since it scales much better (you can easier automate steps),
and it is much easier reproducible (something you probably want in scientific
software) and storable (in a VCS).

> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.

I do hope you have made a fair estimate of the amount of work that it costs to
change the value of a variable in this way.

I would propose to simply use the interactive Python prompt. It doesn't give
you popup icons for clicking, but you do get the entire Python interpreter, and
all its libraries for free.

The Python library has a frame work for customizing the interpreter. Have a
look at 'cmd' module.

> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

Now you have lost me. One window is not enough for interaction?

Obviously, you'll need to have a common interpreter/storage backend. One
solution may be to have a common execution back-end, and for each window a
'frontend' which passes commands entered to the back-end, and echoes results
from the back-end to the terminal.

> Maybe I could just build a small database to store all the values and
> access them from both programs, but chances are sometimes I have to
> deal with big arrays, and they will eat extra memory if I keep them in

They eat memory when you keep them in a data base? It seems, you are making
assumptions about implementations here without telling them.
(ie pick a data base that uses a disk, and your problem is solved. Why is that
not an option?)

Sincerely,
Albert



From ulrich at dorda.net  Sun May 25 06:32:30 2008
From: ulrich at dorda.net (ulrich at dorda.net)
Date: Sun, 25 May 2008 03:32:30 -0700 (PDT)
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org> 
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
Message-ID: <d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>

Thanks for the reply,

Of course the suggested solution is working and good, but a bit
complicated. The module/function where i need to access the variable
value from the interactive shell is burried quite deep and I would
nedd to hand the locals() quite often from one module to another.
Furthermore it makes the call function slightly more complicated, as
the locals()-argunment has to be given every time.

I was hoping for something a bit different: If I wanted to access a
value b from another module "utest2.py", I would simply need to type
in utest.py: import utest2; print 2*utest2.b
Isn't there a name for the interactive namespace (like here the
utest2), which I can use to access the variable without handing the
whole dictionary?

Cheers,

Ulrich





From dannywebster at googlemail.com  Tue May 13 06:46:45 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 03:46:45 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>

On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
> >>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
> >>> f=str(f)
> >>> f.split()
>
> ["['host1","host2", ... ,"hostN\n']"]
>
> Any help is highly appreciated
>
> ta
>
> dan.

I did indeed mean "os.popen", no "os.open"



From none at this.time  Mon May 26 17:06:53 2008
From: none at this.time (Paul Miller)
Date: Mon, 26 May 2008 17:06:53 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
	<mailman.1626.1211831386.12834.python-list@python.org>
Message-ID: <80531$483b266d$3799@news.teranews.com>

On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:

> On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:

> I don't know if it would necessarily look like the CPython VM, except
> for the decode stage (this being said without any knowledge of the
> CPython implementation, but with more than I ever thought I'd know about
> processor architecture/microarchitecture)

Out of curiosity, do you know how easy it would be to make a Python chip 
using FPGAs?  I have little to no hardware knowledge, but it sounds like 
a fun project in any case.  Even if it's not likely to have blazing 
performance, it'd be cool to load Python bytecode directly into 
memory. :-)

-- 
code.py: a blog about Python.  http://pythonista.wordpress.com
** Posted from http://www.teranews.com **


From nick at craig-wood.com  Tue May 20 04:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 03:30:05 -0500
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
	<mailman.1343.1211203732.12834.python-list@python.org>
	<75dc8fc3-aef0-44ee-a6df-059f8cd2e226@d45g2000hsc.googlegroups.com>
Message-ID: <slrng352cq.7sr.nick@irishsea.home.craig-wood.com>

Henrique Dante de Almeida <hdante at gmail.com> wrote:
>  On May 19, 10:28?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > I cannot predict "acceptable speed" requirements, but I can tell that
> > there will be some clients downloading 100MB report files from the
> > server, so I presume that I will need a progress bar. I think that I
> > need to develop my own protocol for this, and probably the underlying
> 
>   Okay, so you need to wrap large binary files in some kind of message,
>  without pre processing them. I think developing your own protocol
>  using XDR is a safe bet.

You might want to consider using netstrings rather than XDR

  http://cr.yp.to/proto/netstrings.txt

They are very simple and would be minimal overhead if all you are
passing is a file and a bit of metadata.

You'll find several modules for python with a bit of searching.  Also
I believe twisted supports them directly or you could easily roll your
own.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mabbikeel at gmail.com  Sun May 18 14:06:10 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 19:06:10 +0100
Subject: Compress a string
Message-ID: <op.ubc28kc14fd8pl@mp1206-hp.config>

Hi guys,

I'm trying to compress a string.
E.g:
  "AAAABBBC" -> "ABC"

The code I have so far feels like it could be made clearer and more  
succinct, but a solution is currently escaping me.


def compress_str(str):
     new_str = ""
     for i, c in enumerate(str):
         try:
             if c != str[i+1]:
                 new_str += c
         except IndexError:
             new_str += c
     return new_str


Cheers
Matt
-- 
--



From wuwei23 at gmail.com  Wed May 21 21:47:28 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:47:28 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <ed46f401-9c6c-46eb-a6db-f14947e8c24a@y22g2000prd.googlegroups.com>

On May 22, 6:10 am, notbob <not... at nothome.com> wrote:
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?

Python has 71 built in functions (in 2.5). Atwood's list of PHP built
ins beginning with 'a' is 124 functions long.

There's a clear reason why people say Python "fits your brain" :)


From jtc at theworld.com  Sun May 11 20:43:08 2008
From: jtc at theworld.com (Jonathsn Cronin)
Date: Mon, 12 May 2008 00:43:08 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <0001HW.C44D0ADD008F9F39F0284530@news.verizon.net>

On Sun, 11 May 2008 16:16:53 -0400, John Salerno wrote
(in message <48275446$0$11628$607ed4bc at cv.net>):

> XLiIV wrote:
> 
>> The range() function returns a list and list is a sequence, isn't?
> 
> I think you're missing the point. To me, there seems to be a fundamental 
> difference between these two things:
> 
> ---
> 
> people = ['Sam', 'Bob', 'Fred']
> 
> for name in people:
>      print name
> 
> ---
> 
> AND
> 
> ---
> 
> num = 33
> 
> for x in xrange(10):
>      print num += 1
> 
> ---
> 
> To me, the first example is a pure use of the for loop. You are 
> iterating through an object and *using* the items you are stepping through.
> 
> The second example, however, is simply doing something 10 times, and 
> what it's doing has nothing to do with 'x' or xrange. So it seems like 
> an abuse of the for loop.

I agree in principle; the first is iteration and the second is repetition.
In Python, the common idiom for a fixed number of repetitions is iterating 
over a number range.  This is true in most languages I am familiar with, 
probably because fixed repetition, where you don't care about the "index" 
value, is rarely used.

The only language I've used that does have fixed repetition is an (old) 
dialect of lisp, and I'm not sure it even made it into Common Lisp.  
Smalltalk and Ruby do have fixed repetition.

Using range may not be entirely elegant, but is pragmatic, and not, to me, 
particularly ugly.  In Python, unlike some languages, you don't have to 
declare the x.

I think you could add it without too much change to the parsing.

for <expression>:
  <block>

Seeing a ":" instead of "in" would mean a repetition statement which would
be interpreted as:
-- if <expression> evaluates to an integer, execute the block that number of 
times.
-- If <expression> evaluates to an iterator, execute the block until the 
iterator is exhausted.

Even if possible, I see this at best a minor improvement and more likely a 
negative because the for keyword is now overloaded. (see "static" in C/Java.) 
You could add a new keyword but the benefit here is much to small to justify 
the trouble.

Jonathan



From google at mrabarnett.plus.com  Wed May 14 18:55:47 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 14 May 2008 15:55:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
Message-ID: <1e4287a7-321c-432a-9217-c97a91ec18b1@y21g2000hsf.googlegroups.com>

On May 14, 10:30 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > Dave Parker schrieb:
> > > All of the calculators and textbooks that elementary school students
> > > use, use "^" for powers.
>
> I've never seen this symbol in textbooks. In textbooks, powers are
> written using superscript.
>
> >>  Just like Flaming Thunder does.  I haven't
> > > seen "**" for powers since FORTRAN.
>
> I haven't seen any language using '^' as the power operator so far -
> but I've seen quite a lot of them using it as the bitwise XOR operator.

BASIC and Comal use '^' as the power operator.


From gandalf at shopzeus.com  Fri May 16 07:42:03 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 13:42:03 +0200
Subject: ply yacc lineno not working?
In-Reply-To: <482D70F0.9070202@shopzeus.com>
References: <482D70F0.9070202@shopzeus.com>
Message-ID: <482D730B.9090607@shopzeus.com>

I'm sorry for the dumb question. I had to add these to the lexer:

def t_comment(t):
    r"\#[^\n]*\n"
    t.lexer.lineno += 1
    # We do not return anything - comments are ignored.

# Define a rule so we can track line numbers
def t_newline(t):
    r'\n+'
    t.lexer.lineno += len(t.value)


Well, it is not very straightforward. From the docs, it was not clear 
that I HAVE TO increment t.lexer.lineno in my lexer if you want yacc to 
parse line numbers. But it is logical. I believe this could be done 
automatically, since "line number" ALWAYS means "\n", there is nothing 
to be configured here. (Am I wrong? There can be parsers to parse files 
where new lines are chr(255) or something?)

Thanks,

   Laszlo



From michael.pearmain at tangozebra.com  Sun May 18 15:55:26 2008
From: michael.pearmain at tangozebra.com (Mike P)
Date: Sun, 18 May 2008 12:55:26 -0700 (PDT)
Subject: Rpy Module
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
	<ad4327b8-c98f-466f-90f1-347d9ce08a96@j33g2000pri.googlegroups.com>
Message-ID: <054ecd85-997e-417b-80d7-ee5c5f89e611@l42g2000hsc.googlegroups.com>

Superb, thanks



From tjreedy at udel.edu  Sat May 17 12:13:47 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 May 2008 12:13:47 -0400
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com><0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
	<g0mvc2$sic$1@news.xmission.com>
Message-ID: <g0n07r$liv$1@ger.gmane.org>


"dave" <squareswallower at 1ya2hoo3.net> wrote in message 
news:g0mvc2$sic$1 at news.xmission.com...
| bear,
| thanks for the suggestions.  I use IDLE to write the code and when it's
| working I paste it over into a new window.

Or you can just save code you want to keep to a new name.

| To add doctests would I need to use a certain
| filename for the tests to be run on?

You can run a doctest on a file from within the file (as well as from 
without).

if __name__ == '__main__': <run doctest>

I presume the manual gives the details.

|  Can you have doctests on random functions?

???

tjr





From badmuthahubbard at gmail.com  Sat May 10 11:58:23 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sat, 10 May 2008 18:58:23 +0300
Subject: People still using Tkinter?
In-Reply-To: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
Message-ID: <8200bab70805100858m11c57dc7l7a1ac19d6e3928d4@mail.gmail.com>

I am, but "still" isn't the word, I just started.  Good, *complete*
docs seem to be hard to find, but using a combination of the free
resources and going back and forth between them seems to work all
right so far.

-Chuckk

On Sat, May 10, 2008 at 8:20 AM, Kenneth McDonald
<kenneth.m.mcdonald at sbcglobal.net> wrote:
> Any guesses as to how many people are still using Tkinter? And can anyone
> direct me to good, current docs for Tkinter?
>
> Thanks,
> Ken
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From jkrukoff at ltgc.com  Thu May 15 19:48:53 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:48:53 -0600
Subject: no inputstream?
In-Reply-To: <1210894979.3312.14.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>  <1210894364.3312.10.camel@jmk>
	<1210894979.3312.14.camel@jmk>
Message-ID: <1210895333.3312.17.camel@jmk>


On Thu, 2008-05-15 at 17:42 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > > > >
> > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > i buffer and parse.  apologies if i misrepresented my code!
> > > > >
> > > > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > work:
> > > > >
> > > > > > from mutagen.mp3 import MP3
> > > > > > id3tags = MP3(urllib2.urlopen(URL))
> > > > >
> > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > string or buffer, instance found".  does this mean i need to convert
> > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > > > directory" errors, with a few HTTP 404s.
> > > > >
> > > > > [snip]
> > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > contents.
> > > > 
> > > > cool, so how do i give it the path, if not in the form of a URL
> > > > string?  maybe this is obvious...
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > 
> > > It doesn't look like you can, with mutagen. So, time to find a different
> > > library that supports arbitrary file objects instead of only file paths.
> > > I'd suggest starting here:
> > > http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> > > 
> > > Possibly one with actual documentation, since that would also be a step
> > > up from mutagen.
> > > 
> > 
> > After a bit of time looking around, looks like nearly all the python id3
> > modules expect to work with filenames, instead of file objects.
> > 
> > I can't vouch for it, and the documentation still looks sparse, but this
> > module at least looks capable of accepting a file object:
> > http://pypi.python.org/pypi/tagpy
> > 
> > Looks like it'd be a challenge to build if you're on windows, since it
> > depends on an external library.
> > 
> > Alternately, you could probably create a subclass of the mutagen stuff
> > that used an existing file object instead of opening a new one. No idea
> > what that might break, but seems like it would be worth a try.
> > 
> > As last ditch option, could write the first few kb of the file out to a
> > temp file and see if mutagen will load the partial file.
> > 
> 
> Okay, now I'm officially spending too much time looking through this
> stuff.
> 
> However, looks like the "load" method of the MP3 class is what you'd
> want to override to change mutagen's file loading behavior. Probably
> pass the URL as the filename, and take a cut & paste version of the
> default load method from ID3FileType and change it to use urllib2 to
> open it instead of a local file open.
> 
> Might work. Might not. No warranty express or implied.

Hrm, damn, looks like you'd also have to create a custom ID3 class and
override load there too, since that gets called from the ID3FileType
load method. Definitely looks like work.
-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From bruno.desthuilliers at gmail.com  Wed May 14 16:35:19 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:35:19 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
Message-ID: <2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>

On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> George Sakkis <george.sak... at gmail.com> writes:
> > On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> >> > An instance method works on the instance
> >> > A Static method is basically a function nested within a class object
> >> > A class method is overkill?
>
> >> If anything, a static method is overkill. See it this way: *if* you for some
> >> reason put a method into an enclosing context - isn't it worth having a
> >> reference to that?
>
> > My feeling exactly; these days I almost always use class methods
> > instead of static. I vaguely remember seeing somewhere an example
> > where a static method was the only (elegant) solution; neither a class
> > method nor a plain function would do. I'll post it if I find it unless
> > someone beats me to it.
>
> > George
>
> __new__ is a static method!

__new__ is a special-cased staticmethod that  1/ must not be declared
as such and 2/ takes the class object as first args. As far as I'm
concerned, it's semantically a classmethod.


From marlin_rowley at hotmail.com  Thu May 15 11:59:59 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 10:59:59 -0500
Subject: unpack() exploration!
Message-ID: <BAY135-W2733F32ABD7DC1DAD7FCB49FC90@phx.gbl>


All:

I've got a script that runs really slow because I'm reading from a stream a byte at a time:

// TERRIBLE
for y in range( height ):
        for color in range(4):
            for x in range( width ):
                    pixelComponent = fileIO.read(4)
                    buffer = unpack("!f",pixelComponent)  << unpacks ONE float, but we now can do something with that pixel component.


I can speed this up dramatically if I did this:

// MUCH FASTER
for y in range( height ):
    for color in range(4):
        pixelComponent = fileIO.read(4*width) <<<<<<<<<  GET a LOT more data from the stream into memory FIRST!!
        for x in range( width ):
           buffer = unpack( ?????? ) <<<< how do I get each float from the pixelComponent???


-M



_________________________________________________________________
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From Matthew.Moorland at gmail.com  Mon May  5 01:35:43 2008
From: Matthew.Moorland at gmail.com (ETP)
Date: Sun, 4 May 2008 22:35:43 -0700 (PDT)
Subject: USB HID documentation?
Message-ID: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>

I have a little robot project I'm programming in python using the
Lynxmotion SSC-32 servo controller via serial.  I'd like to use a USB
game controller (PS2 style) to control the robot.

I've read a number of threads about the difficulty of using USB
without extensive understanding of the way it works, but a few have
stated that HID is different somehow.  I definitely do not have any
USB knowledge, and I don't care to get into that.  However, if USB-HID
is much simpler I would love to learn.

I have the python extensions for windows:
     http://sourceforge.net/project/showfiles.php?group_id=78018
but I haven't found any documentation on how to implement HID in
python.  Can anyone give me some examples or links?

Thanks much.


From tjreedy at udel.edu  Mon May 12 02:09:09 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 02:09:09 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
Message-ID: <g08mu3$e29$1@ger.gmane.org>


"Mark Dickinson" <dickinsm at gmail.com> wrote in message 
news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
|> Do you have in mind any situations in which it is advantageous to have 
0**0
|> undefined?

| (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))

Which, of course, I was not, but for the sake of discussion....

| then it's not at all clear that 0.**0. should be considered well-defined.

Then it seems equally dubious that 0.**y, y>0, should be well-defined.
It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
defined whether y is 0 or not, even though there is a discontinuity in the 
limit.
.
...
| The big problem here is that the power operation is really trying
| to combine two subtly different functionalities (integer powers
| and real powers), with quite distinct use-cases, into a single
| function.  Which leads to problems:  witness the mess that's
| C99's pow specification:  why does it make sense for (-2.0)**2.0 to
| return 4.0, while (-2.0)**1.999999999 returns NaN?

2.5 raises an exception.  In 3.0,
>>> (-2)**1.99999999
(3.9999999722741113-1.2566370355167477e-07j)

| Incidentally, the decimal module is slightly schizophrenic about this:

That module follows the IBM-led standard, no matter how crazy.

Terry Jan Reedy





From vivainio at gmail.com  Mon May  5 17:57:38 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 21:57:38 GMT
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
Message-ID: <1w4gs9bk.fsf@gmail.com>

Paul Boddie <paul at boddie.org.uk> writes:

> Anyway, I'm just confirming that I'm clearly not one of the "many"
> described above. A lot of my own work is licensed under the GPL or

I guess it's safe to assume that you are not opposed to using code
based on more liberal license, right? :-)

My point is: GPL is a reason to reject a tool for some, but MIT/BSD
never is. Ultimately, of course, it's up to the preferences of the
author but if the idea is to maximize the popularity, GPL is a worse
bet.


From kyrie at uh.cu  Fri May 16 16:31:39 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 16 May 2008 16:31:39 -0400
Subject: encoding problem
Message-ID: <200805161631.39307.kyrie@uh.cu>


Hi, guys.
I'm trying to read an xml file and output some of the nodes. For that, I'm 
doing a 
print node.toprettyxml()

However, I get this exception:

===
    out.write(tag.toxml())
UnicodeEncodeError: 'ascii' codec can't encode character u'\xba' in position 
190: ordinal not in range(128)
===

That happens if I "print" it, or send it to stdout, or send it to a file.

How can I fix it? 
cat file works perfectly, and I'm using an utf8 terminal.

I'm particularly puzzled that it won't work even if I write to a file opened 
in "b" mode. Worst thing is... I don't really need that character, just a 
general idea of how the document looks like.

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From ivlenin at gmail.com  Sun May 25 22:42:58 2008
From: ivlenin at gmail.com (I V)
Date: Mon, 26 May 2008 02:42:58 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
	<a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>
Message-ID: <Ssp_j.2026$jI5.529@flpi148.ffdc.sbc.com>

On Sun, 25 May 2008 18:42:06 -0700, notnorwegian wrote:
> def scrapeSites(startAddress):
>     site = startAddress
>     sites = set()
>     iterator = iter(sites)
>     pos = 0
>     while pos < 10:#len(sites):
>         newsites = scrapeSite(site)
>         joinSets(sites, newsites)

You change the size of "sites" here, which means you can no longer use 
the iterator.

> wtf? im not multithreading or anything so how can the size change here?

How about:

def scrape_sites(start_address):
	sites = set([start_address])
	sites_scraped = set()
	# This will run until it doesn't find any new sites, which may be 
	# a long time
	while len(sites) > 0:
		new_sites = set()
		for site in sites:
			new_sites.update(scrape_site(site))
		sites_scraped.update(sites)
		sites = new_sites.difference(sites_scraped)
	return sites


From paddy3118 at googlemail.com  Mon May 12 02:27:23 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 11 May 2008 23:27:23 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
Message-ID: <3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>

On May 11, 9:28 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
Hi John, Arnaud;

> Contrived example:
>
> # Print 'hello' 10 times; x is not used
> for x in xrange(10):
>     print 'hello'

I've used Fortran and C and so would tend to use either i,j,k as the
unused loop variable above, or, for clarity, call it something
descriptive like loop_count, if the loop body would be clearer.

I would also just use range for small, (especially small constant),
ranges.

>
> # By changing what is iterated over, no unused variable:
> from itertools import repeat
> for msg in repeat('hello', 10):
>     print msg
I guess I would not go to the trouble of using itertools.repeat unless
it was simplifying/homogenising a larger expression - i.e if it was
part of some functional expression

I've never fealt the need for a separate repeat statement myself
either.

- Paddy.

P.S: I do understand that your examples are contrived. Just my
thoughts.



From greg at cosc.canterbury.ac.nz  Thu May 15 04:52:35 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 15 May 2008 20:52:35 +1200
Subject: ANN: Pyrex 0.9.8
Message-ID: <mailman.1164.1210860644.12834.python-announce-list@python.org>

Pyrex 0.9.8 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

This version has a number of new features:

* In-place operators (+= etc.) are now supported.

* The Pyrex compiler now has built-in facilities for
   automatically tracking down and compiling all the
   modules a given module depends on, and for only
   compiling modules whose source has changed.

* Some restrictions on nogil functions have been relaxed.
   In particular, it's now possible to declare a C method
   as nogil.

* A feature has been added that makes it easier to manage
   circular imports between .pxd files. It's now possible
   to declare two extension types in different .pxd files
   that refer to each other.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From mishok13 at gmail.com  Tue May 27 11:55:02 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 18:55:02 +0300
Subject: New chairman
In-Reply-To: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
Message-ID: <192840a00805270855i20ccdb1clfafe8bff575dbd59@mail.gmail.com>

2008/5/27 Sverker Nilsson <sn at sncs.se>:
> I dont want to be a new Guido. Somebody else please.
>

    Please, explain why should we fork Python? Because Python 3.0 will
have 'print' as a function, not as a statement, am I right? Or maybe
the reason is a major breakage of C API in Python 3.0, so that
Guppy-PE/Heapy will both need a complete re-write? There is a
rationale for these changes and you've been told about it several
times, but you don't care much to listen.
    Well, anyway, nobody stops you from forking a project called
'Python'. Python is free software, as you know.

> S.
>
>
> On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
>> I was talking about Guido van Rossum
>>
>> The one who decides, so far when people agree
>>
>> But we can make a new fork
>>
>> He is the originator, but now it seems, for me, it is hanging out in
>> the air
>>
>> So we need some new leadership
>>
>> From somebody, somebody like you perhaps. Or me.
>>
>> Sverker
>>
>> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
>> wrote:
>>
>> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>>
>> > > seems to be needed
>>
>> > > He doesn't seem to care much anyway now
>>
>> > > Or if he cares, he have many other assignments
>>
>> > Who are you talking about?
>>
>> > > So should we try to elect a new chairman?
>>
>> > Chairman? Elaborate please.
>>
>> > > I am probably not eligible. There must be many others.!
>>
>> > > Do you dare?consper
>>
>> > Hm, are you and castrionpi twin brothers or something?
>>
>> > > S.
>> > > --
>> > >http://mail.python.org/mailman/listinfo/python-list
>>
>> > --
>> > Wbr, Andrii Mishkovskyi.
>>
>> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From roy at panix.com  Wed May 21 08:40:37 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 08:40:37 -0400
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <roy-461748.08403721052008@70-1-84-166.area1.spcsdns.net>

In article 
<2fc55c56-7408-4f44-b6e2-64f85f341ac9 at i36g2000prf.googlegroups.com>,
 srinivas <srinivas.puvvala at gmail.com> wrote:

> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
> 
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
> 
> pls help me friends how to do that.

You need to either:

1) Put your modules in some directory that's already on your python path.  
To find out what your path is, do:

import sys
print sys.path

It should include a directory which ends in "site-packages".  Just drop 
your modules into that directory.

2) Add the directory where you modules are to your python path.  The 
easiest way to do this is to set PYTHONPATH in your environment.


From kyrie at uh.cu  Mon May 19 16:29:38 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Mon, 19 May 2008 16:29:38 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <200805191629.38919.kyrie@uh.cu>

On Monday 19 May 2008 03:39:36 pm destroooooy wrote:
> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.

It's not arbitrary, and you shouldn't be using that convention.

The question is really about "equality" versus "identity". Two identical sized 
cubes may be equal, but they are certainly not the same cube. The main 
concept here: identity [usually] implies equality, but equality almost never 
implies identity (two objects that are equal may be distinct nonetheless).

More practical example, two angles with the same measure are equal by every 
mathematical concept, but opposing angles on a parallelogram are not the same 
one.

Sometimes, you need to test for equality, as in "is this user input equal 
to '1'?". Sometimes, you need to test for identity "is this user input 
this '1' that I have here?" (note: the second answer should be 'no', unless 
that by some dark magic the user manages to get that same '1' that is in your 
code).

The most common use case is equality. You test for equality with == and !=.
The darker case is identity. You test for identity with "is" and "is not". 
Whenever you use "is", ask yourself a question: does a negative answer makes 
sense if the objects are equal?

Personally, I like to use "is" with singletons. I find it easier to type and 
read "if param is None" than "if param == None", but some python developers 
dislike the first one because of the "dark magic" involved in knowing that 
None is a singleton.

When in doubt, test for equality. Use "is" only when you are certain that you 
know the difference. Python does some optimizations that may it seem like it 
is working with 'is' at first, but it really isn't:

In: a="hi"
In: b="hi"
In: a is b
Out: True        <-- dark magic here, python optimized the string storage,
In: a is "h"+"i" <-- by using the same object instead of creating a new one
Out: False       <-- but even that won't always work, so
                       

In: a="a very long string, at least longer than 'hi'"
In: b="a very long string, at least longer than 'hi'"
In: a is b
Out: False       <-- never, never rely on magic.

I hope I was useful.

Cheers,

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From wuwei23 at gmail.com  Thu May 22 04:59:28 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 01:59:28 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com>
Message-ID: <2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com>

On May 22, 6:22 pm, jonbutle... at googlemail.com wrote:
> Still getting very odd errors though, this being the latest:
>
> Traceback (most recent call last):
>   File "spider.py", line 38, in <module>
> [...snip...]
>     raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
> httplib.InvalidURL: nonnumeric port: ''

Okay. What I did was put some output in your Spider.parse method:

    def parse(self, page):
        try:
            print 'http://' + page
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

And here's the output:

    >python spider.py
    What site would you like to scan? http://www.google.com
    http://www.google.com
    http://http://images.google.com.au/imghp?hl=en&tab=wi

The links you're finding on each page already have the protocol
specified. I'd remove the 'http://' addition from parse, and just add
it to 'site' in the main section.

    if __name__ == '__main__':
        s = Spider()
        site = raw_input("What site would you like to scan? http://")
        site = 'http://' + site
        s.crawl(site)

> Also could you explain why I needed to add that
> HTMLParser.__init__(self) line? Does it matter that I have overwritten
> the __init__ function of spider?

You haven't overwritten Spider.__init__. What you're doing every time
you create a Spider object is first get HTMLParser to initialise it as
it would any other HTMLParser object - which is what adds the .rawdata
attribute to each HTMLParser instance - *and then* doing the Spider-
specific initialisation you need.

Here's an abbreviated copy of the actual HTMLParser class featuring
only its __init__ and reset methods:

    class HTMLParser(markupbase.ParserBase):
        def __init__(self):
            """Initialize and reset this instance."""
            self.reset()

        def reset(self):
            """Reset this instance.  Loses all unprocessed data."""
            self.rawdata = ''
            self.lasttag = '???'
            self.interesting = interesting_normal
            markupbase.ParserBase.reset(self)

When you initialise an instance of HTMLParser, it calls its reset
method, which sets rawdata to an empty string, or adds it to the
instance if it doesn't already exist. So when you call
HTMLParser.__init__(self) in Spider.__init__(), it executes the reset
method on the Spider instance, which it inherits from HTMLParser...

Are you familiar with object oriented design at all? If you're not,
let me know and I'll track down some decent intro docs. Inheritance is
a pretty fundamental concept but I don't think I'm doing it justice.


From goldnery at gmail.com  Mon May 26 18:26:50 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 15:26:50 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
Message-ID: <4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com>

On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com>
> wrote:
>
> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > > Thanks!
> > > Anyone know which library should i learn then?
>
> > Looks like you need to dive into Win32 APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://ms...
> > and others
> > combined with ctypes.
>
> > Ivan
>
> well, that seems extremely valuable but how can i implement those
> functions with python?

You know what I'm sorry, I will try to understand the ctypes lib
before bothering you.

thank you all!


From kwmsmith at gmail.com  Thu May 22 13:49:39 2008
From: kwmsmith at gmail.com (Kurt Smith)
Date: Thu, 22 May 2008 12:49:39 -0500
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>

On Thu, May 22, 2008 at 10:55 AM, duli <dulipishi at gmail.com> wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.

The bigger the project, the more likely it is that you'll have
documentation on how to use it (for a language or library, how to use
the features in your program) but to take the time to write up a
dead-tree book on the project's "inception, problem definition,
design, coding and final delivery" is not likely well spent.  Anyone
who has the expertise to write such a book would probably be spending
his time working on the next phase of the project itself.

Someone will probably respond with an amazon link to a book that does
exactly what you're asking, in which case, I will stand corrected.
But I'll be surprised.

>
> Most of the code I have written and books that I have read deal with
> toy programs and I am looking for something a bit more
> comprehensive.  For example, maybe a complete compiler written in C++
> for some language, or a complete web server or implementing
> .net libraries in some language (just a few examples of the scale of
> things I am interested in learning).

It seems to me the reason toy programs are so prevalent is because
they illustrate a (few) well defined ideas in a short amount of code.
A big project, necessarily, brings together all kinds of stuff, much
of which may not interest the author at all, and so doesn't motivate
him to write a book about it.

Compilers, web servers & .NET libraries are *widely* varying areas.
You may have interest in them all, but to significantly contribute to
any requires a fair amount of expertise and specialization.

The best route I've found to learn how to organize & program large
scale applications is this: find a cutting edge program that interests
you and that is open source.  Download its source, and read the code.
Diagram it.  Map it out.  Read the comments.  Join the mailing list
(probably the developer's list), lurk for a while, and ask questions
about why they organized things the way they did.  Get the overall big
picture and learn from it.  Better yet, find out what pitfalls they
found and avoided (or fell into).  Compare their approach &
organization with another competing project.  This is the wonder of
open source software -- you have access to everything, and can learn
from all the expertise the developers put into their opus.

You can learn the basics from books, but nothing beats analyzing a
species in the wild.

Kurt


From nospam at here.com  Sun May 18 15:28:34 2008
From: nospam at here.com (Dennis)
Date: Sun, 18 May 2008 20:28:34 +0100
Subject: python confusion possibly related to pickle
Message-ID: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>


I have a problem that I don't understand at all. I run a python script, 
which uses pickle, and it fails. That alone is, perhaps, no big deal.

The problem that's got me annoyed is that after getting said error I 
close the shell window, open a new one, run the python interpreter and 
type "import pickle" and get the error that the script I'd run earlier 
caused. Why is this ?

To my knowledge, once python stopped running it didn't store anything 
related to the last time it was run.


From ivan.illarionov at gmail.com  Sat May  3 21:20:29 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 4 May 2008 01:20:29 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
	<fvirho$15ti$2@news.mtu.ru>
	<9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>
Message-ID: <fvj30t$17uu$1@news.mtu.ru>

On Sat, 03 May 2008 17:43:57 -0700, George Sakkis wrote:

> On May 3, 7:12?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:
>> > On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
>> >> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>>
>> >> > Arnaud Delobelle wrote:
>>
>> >> >> sum() works for any sequence of objects with an __add__ method,
>> >> >> not just floats! ?Your algorithm is specific to floats.
>>
>> >> > This occurred to me also, but then I tried
>>
>> >> > sum(['abc', 'efg'], '')
>>
>> >> Interesting, I always thought that sum is like shortcut of
>> >> reduce(operator.add, ...), but I was mistaken.
>>
>> >> reduce() is more forgiving:
>> >> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
>> > Hm, it works for lists:
>> > sum(([1], [2]), [])
>> > [1, 2]
> 
> So it's not reduce() that is more forgiving, it's sum() that makes an
> exception for strings only.
> 
> 
>> > However I find the seccond argument hack ugly. Does the sum way have
>> > any performance advantages over the reduce way?
>>
>> Yes, sum() is faster:
>>
>> $ python -m timeit "" "sum([[1], [2], [3, 4]], [])" 100000 loops, best
>> of 3: 6.16 usec per loop
>>
>> $ python -m timeit "import operator" \ "reduce(operator.add, [[1], [2],
>> [3, 4]])" 100000 loops, best of 3: 11.9 usec per loop
> 
> Not really; you measure the import and the attribute access time in the
> second case. sum() is 2x faster for adding numbers only:
> 
> # Adding integers
> python -mtimeit --setup="x=[1]*100" "sum(x)" 100000 loops, best of 3:
> 4.87 usec per loop python -mtimeit --setup="from operator import add;
> x=[1]*100" "reduce(add,x)"
> 100000 loops, best of 3: 10.1 usec per loop
> 
> # Adding floats
> python -mtimeit --setup="x=[1.0]*100" "sum(x)" 100000 loops, best of 3:
> 5.14 usec per loop python -mtimeit --setup="from operator import add;
> x=[1.0]*100" "reduce(add,x)"
> 100000 loops, best of 3: 10.1 usec per loop
> 
> # Adding tuples
> python -mtimeit --setup="x=[(1,)]*100" "sum(x,())" 10000 loops, best of
> 3: 61.6 usec per loop python -mtimeit --setup="from operator import add;
> x=[(1,)]*100" "reduce(add,x,())"
> 10000 loops, best of 3: 66.3 usec per loop
> 
> # Adding lists
> python -mtimeit --setup="x=[[1]]*100" "sum(x,[])" 10000 loops, best of
> 3: 79.9 usec per loop python -mtimeit --setup="from operator import add;
> x=[[1]]*100" "reduce(add,x,[])"
> 10000 loops, best of 3: 84.3 usec per loop
> 
> George

Thanks for correction. Forget about --setup.

-- 
Ivan


From tjreedy at udel.edu  Thu May 15 03:06:54 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 15 May 2008 03:06:54 -0400
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <g0gnea$o0b$1@ger.gmane.org>


"urikaluzhny" <ukaluzhny at nds.com> wrote in message 
news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
| It seems that I rather frequently need a list or iterator of the form
| [x for x in <> while <>]

I can think of two ways to interpret that.

| And there is no one like this.
| May be there is another short way to write it (not as a loop). Is
| there?

Using loops to write an example of what you mean would make the above 
clearer.

tjr





From j.spies at hccnet.nl  Mon May 19 15:24:39 2008
From: j.spies at hccnet.nl (Jaap Spies)
Date: Mon, 19 May 2008 21:24:39 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>
	<f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>
Message-ID: <32aef$4831d3f8$d4785a98$9215@cache6.tilbu1.nb.home.nl>

Vicent Giner wrote:
> Thank you very much for all the answers I've got.
> 
> As far as I have understood, Python can be a good alternative, or, at
> least, a reasonable choice.
> 
> I intend to design new algorithms for a kind of Optimization problems,
> and then I have to implement them and show/prove that they are good
> enough, in terms of effectiveness (quality of the solution that the
> algorithm is able to find, for some given "difficult" problems), and
> not mainly in terms of efficiency (time to find the solution).
> 
> I mean, in order to prove that my algorithms are "good", I have to
> compare them with the results given by other algorithms, in terms of
> how much better is the solution given by my proposal, in front of the
> previous ones. Only comparatives in terms of "number of iterations",
> and not "time to find the solution", can be done (I think).
> 

Here you find good company in the Sage developers community!

Jaap


> And I also realize, from your posted answers, that the point is doing
> a good programming work, and that I will have to look very carefully
> at all those packages and resources you have mentioned, to do a good
> work at Python.
> 
> Any other suggestion will be welcomed.    :-)
> 
> Thank you very much again!
> 
> --
> Vicent


From mattheww at chiark.greenend.org.uk  Wed May 21 18:09:36 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 21 May 2008 23:09:36 +0100 (BST)
Subject: Running programs under a python program...
References: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>
Message-ID: <u2c*ODsds@news.chiark.greenend.org.uk>

samslists at gmail.com <samslists at gmail.com> wrote:
> So I have a python program that runs a bunch of other programs....it
> then loops forever, occasionally executing other programs.
>
> To run each of these programs my python code executes:
> subprocess.Popen(command_line, shell=True, stdout=fd,
> stderr=subprocess.STDOUT)
>
> where command_line is an appropriate command line.  :)
>
> Now my problem is when I abort this program it kills off all the child
> processes I've started. In this case I don't want that.   How can I
> stop the child processes from dieing when I kill off the parent?

It depends on why the children are dying.

>From what you say, it seems likely that they're trying to write to
their standard output, and exiting because that's a pipe that is now
closed.

If that's the case, it's probably best to start by deciding where you
want that output to go when the parent process has ended. Perhaps you
can just send it all to a log file in the first place.

-M-



From pataphor at gmail.com  Sun May 18 02:50:23 2008
From: pataphor at gmail.com (pataphor)
Date: Sun, 18 May 2008 08:50:23 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
Message-ID: <MPG.2299f0055cfb7860989685@nntp.aioe.org>

In article <hjlt245hnhrle11khpupg6fppr000f8f51 at 4ax.com>, 
dullrich at sprynet.com says...

> >>   window.pos = (x,y)
> >>
> >> seems more natural than
> >>
> >>   window.SetPos(x,y);

Yes, and to assign a row in a matrix I'd also like to use either tuples 
or lists on the right side. 

>   def __add__(self, other):
>     return Row([x + y for x, y in zip(self, other)])
> 
> worked as hoped if self is a Row and other is a
> Row _or_ a list.)
> 
> Anyway, my m.rows[j] can't be a list, because
> I want to be able to say things like
> m.rows[0] += c*m.rows[2]. Allowing 
> m.rows[j] = [1,2,3] seems convenient, while
> requiring m.rows[j] = Row([1,2,3]) fixes
> this problem. Hmm.

I'm not sure how far you'd go along with Gabriel's idea of decoupling 
views from data but I think there isn't even a need for using a matrix 
as the underlying data type. Why not use a flat list and compute matrix 
positions according to a row or column adressing scheme on the fly? 

P.



From kyosohma at gmail.com  Thu May 22 13:04:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 10:04:40 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>

On May 22, 11:14?am, cm_gui <cmg... at gmail.com> wrote:
> Python is slow. ? ?Almost all of the web applications written in
> Python are slow. ? Zope/Plone is slow, sloow, so very slooow. ?Even
> Google Apps is not faster. ? Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

What about http://www.torontolife.com/ ? It uses Django...

Mike


From castironpi at gmail.com  Tue May 13 06:57:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:57:35 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>
Message-ID: <ab78c31e-347a-49c2-b62c-bd5e38f15bb4@27g2000hsf.googlegroups.com>

On May 13, 5:46?am, dannywebs... at googlemail.com wrote:
> On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
>
>
>
>
>
> > Hi - I have a list returned from popen/readlines, and am wondering how
> > to go about iterating over each item which was returned (rather than
> > currently having the whole lot returned).
>
> > so far:
>
> > >>> f=os.open("./get_hostnames").readlines
>
> > returns ['host1 host2 host3 ... hostN\n]'
>
> > i'd like to be in a position to iterate through these, grabbing each
> > host. ?I have played with transmuting to a str, and using split, and
> > this works, but I get the subscript brackets from the list output as
> > expected, as the list output is now a string literal, and this is not
> > what I want - and I think it's a bit long-winded to do a search 'n
> > replace on it - hence why I ask in the subject what's the best way.
>
> > >>> f=str(f)
> > >>> f.split()
>
> > ["['host1","host2", ... ,"hostN\n']"]
>
> > Any help is highly appreciated
>
> > ta
>
> > dan.
>
> I did indeed mean "os.popen", no "os.open"- Hide quoted text -
>
> - Show quoted text -

I do indeed write a pretty fine real-time, low-bandwidth, game.  It is
like real-time chess, and seen the movie, Tron.  Can't the P2Ps zip up
in an hour?


From roy at panix.com  Sat May 24 18:16:04 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 18:16:04 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
Message-ID: <roy-73D0E0.18160424052008@70-1-84-166.area1.spcsdns.net>

David <wizzardx at gmail.com> wrote:

> While it is possible to describe all problems in docs, it can be very
> hard to write actual test code.
> 
> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

In some cases, you can use mock objects to mimic the "can never happen" 
situations.  But, you are right, there are certainly cases which are 
difficult or impossible to test for.  TDD is a very powerful tool, but it's 
just that: a tool.  It's not a magic wand.

My suggestion is to make using TDD a habit, but don't turn it into a 
religion.  You will undoubtedly find places where it's just the wrong tool.  
Don't let the fact that it can't do everything keep you from using it when 
it makes sense.


From ian.g.kelly at gmail.com  Wed May 14 09:29:33 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 14 May 2008 07:29:33 -0600
Subject: list.__len__() or len(list)
In-Reply-To: <87r6c5s71g.fsf@mulj.homelinux.net>
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
	<87r6c5s71g.fsf@mulj.homelinux.net>
Message-ID: <3fc761710805140629yb2aa55ai4cf8f62522ea78d@mail.gmail.com>

On Wed, May 14, 2008 at 1:01 AM, Hrvoje Niksic <hniksic at xemacs.org> wrote:
>  Have you tried it?  __len__ is in fact marginally slower because it
>  involves a dict lookup, whereas the built-in len() knows how to cheat
>  and invoke __len__ through a slot in the C type struct very
>  efficiently.
>
>  $ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
>  1000000 loops, best of 3: 0.24 usec per loop
>  $ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
>  1000000 loops, best of 3: 0.347 usec per loop

For built-in types, sure.  For user-defined types in Python, it's the
other way around:

>>> setup = 'class L:\n  def __len__(self): return 42\nl = L()'
>>> t1 = timeit.Timer('len(l)', setup)
>>> t2 = timeit.Timer('l.__len__()', setup)
>>> t1.timeit()
0.63981378918270337
>>> t2.timeit()
0.41051271879526041


From grante at visi.com  Sun May 11 20:03:43 2008
From: grante at visi.com (Grant Edwards)
Date: Sun, 11 May 2008 19:03:43 -0500
Subject: python without while and other "explosive" statements
References: <mailman.949.1210549611.12834.python-list@python.org>
Message-ID: <0oGdnUfSYOXCFLrVnZ2dnUVZ_uLinZ2d@posted.visi>

On 2008-05-11, ivo talvet <ivo.talvet at gmail.com> wrote:

> Is it possible to have a python which not handle the execution of
> "while", "for", and other loop statements ? I would like to allow
> remote execution of python on a public irc channel, so i'm looking for
> techniques which would do so people won't be able to crash my computer
> (while 1: os.fork(1)), or at least won't won't freeze my python in a
> infinite loop, make it unresponsive.

The easiest thing to to is to limit the amount of files,
disk-space, file descriptors, inodes, memory, cpu, and
processes that the users are allowed.  If bash is your shell,
the builtin "ulimit" provides most of those features.  The file
system quota features provide the rest.

> Is there a compiling option (or better, something i can get
> with apt-get cos i think compiling myself and handle all the
> metastuff myself is somehow dirty) for have a "secure python"
> (you can guess what i mean by "secure" in my case) or must i
> touch myself the source disable some code lines ? If last
> solution, which modifications in which files should i do?

My advice is don't try to secure Python itself: secure the
environment in which the users are using it.

-- 
Grant Edwards                   grante             Yow!  Did I SELL OUT yet??
                                  at               
                               visi.com            


From amit.uttam at gmail.com  Wed May 21 18:48:48 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Wed, 21 May 2008 15:48:48 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
	<mailman.1366.1211238396.12834.python-list@python.org>
Message-ID: <46591c0a-7544-4674-8caa-fc56587e71b9@w8g2000prd.googlegroups.com>

On May 19, 4:05 pm, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Tue, 20 May 2008 06:58:28 +1000, <amit.ut... at gmail.com> wrote:
> > On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> >> amit.ut... at gmail.com writes:
> >> > I've recently jumped big time into python and I'm working on a
> >> > software program for testing automation.
>
> >> Welcome, to both fields :-)
>
> > Thanks! I am having a great time learning and coding in python. It's
> > an amazing programming language.
>
> >> > I had a question about proper logging of output. What I would like
> >> > is:
>
> >> >  1. a function syslog (to log output to log file only)
> >> >  2. a function stdout (to log output to stdout only)
> >> >  3. a function sslog (to log output to both log and stdout)
>
> >> > Right now I am using StandOut module
>
> >> Have you investigated the 'logging' module in the Python standard
> >> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> >> to meet your listed requirements, without need of external
> >> dependencies.
>
> > Hmm..Yeah I didn't realize python had its own standard logging
> > facility. I took a look at it and it seems to do the job. However, the
> > output seems to be syslog style output. In the program I am writing,
> > the log file stores all the output of the commands being run (e.g. tcl
> > scripts, etc). Will this be possible using the built in python logging
> > module?
>
> > Thanks,
> > Amit
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> You can define the format of the log output in basicConfig(), for example:
>
>  from logging import basicConfig, error, info, INFO
> ...
>    basicConfig(
>        datefmt='%Y%m%d_T%H%M%S',
>        filemode='a',
>        filename=LOG_PATH,
>        format='%(asctime)s,%(levelname)s,%(message)s',
>        level=INFO
>    )
>
> If you want to log the output of other commands in your log file, you can
> connect a pipe to that command.  Maybe look at "subprocess -- Subprocess
> management" inhttp://docs.python.org/lib/module-subprocess.html
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

Thanks for the reply.

Yeah I am using the subprocess module and I am able to capture the
output and save it to log a file. However, looking at module-logging
the output format is like syslog. What I want is my own custom log
file format. I wrote a separate module containing all the functions
for the logging but I can't seem to use it globally. How does one use
global variables in python?

Code:

# log.py - A base class that provides logging functionality.
#
# Copyright 2008 Amit Uttamchandani <auttamchandani at canoga.com>
#

import os
import sys

logfile = None
global logfile

def createLogFile(filename):
    '''Opens a file for logging.'''
    try:
        logfile = open(filename, 'w')
    except IOError:
        print 'Error: Cannot create log file: %s' %
os.abspath(logfile)
        sys.exit(0)

def stdlog(logstr):
    '''Writes output to stdout.'''
    sys.stdout.write(logstr)

def syslog(logstr):
    '''Writes output to logfile.'''
    logfile.write(logstr)

def agglog(logstr):
    '''Aggregate output of logstr.'''
    syslog(logstr)
    stdlog(logstr)

def closeLogFile():
    '''Closes the log file.'''
    logfile.close()


Thanks,
Amit


From darcy at druid.net  Sat May 24 16:34:14 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sat, 24 May 2008 16:34:14 -0400
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
Message-ID: <20080524163414.70b702b2.darcy@druid.net>

On Sat, 24 May 2008 17:51:23 +0200
David <wizzardx at gmail.com> wrote:
> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing the
> code you will also think of a lot of corner cases you should also
> handle. The natural way to do this is to add them to the code first.
> But with TDD you have to first write a test for the corner case, even
> if setting up test code for it is very complicated. So, you have these
> options:
> 
> - Take as much time as needed to put a complicated test case in place.

Absolutely.  You may think that it is slowing you down but I can assure
you that in the long run you are saving yourself time.

> - Don't add corner case to your code because you can't (don't have
> time to) write a test for it.

If you don't have time to write complete, working, tested code then you
have a problem with your boss/client, not your methodology.

> - Add the corner case handling to the code first, and try to add a
> test later if you have time for it.

Never!  It won't happen.

> Having to write tests for all code takes time. Instead of eg: 10 hours
> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
> writing all the tests, and 10 on the code.

In conventional development, 10 hours of code requires 90 hours of
testing, debugging and maintenance.  Under TDD (and agile in general)
you spend 20 hours testing and coding.  That's the real economics if
you want to deliver a good product.

> I think that automated tests can be very valuable for maintainability,
> making sure that you or other devs don't break something down the
> line. But these benefits must be worth the time (and general
> inconvenience) spent on adding/maintaining the tests.

I can assure you from experience that it always is worth the time.

> If I did start doing some kind of TDD, it would be more of the 'smoke
> test' variety. Call all of the functions with various parameters, test
> some common scenarios, all the 'low hanging fruit'. But don't spend a
> lot of time trying to test all possible scenarios and corner cases,
> 100% coverage, etc, unless I have enough time for it.

Penny wise, pound foolish.  Spend the time now or spend the time later
after your client complains.

> I'm going to read more on the subject (thanks to Ben for the link).
> Maybe I have some misconceptions.

Perhaps just lack of experience.  Read up on actual case studies.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From bbxx789_05ss at yahoo.com  Mon May 12 19:07:10 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 12 May 2008 16:07:10 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>
Message-ID: <57fc5176-db60-413d-99cf-d8a71574cfe8@27g2000hsf.googlegroups.com>

On May 12, 4:59?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 12, 1:54?pm, Jetus <stevegi... at gmail.com> wrote:
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
>
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> 1) Use BeautifulSoup to extract the path:
>
> JCCOGetImage.jsp?refnum=DN2007036179
>
> from the html page.
>

BeautifulSoup will allow you to locate and extract the href attribute:

javascript:openimagewin('JCCOGetImage.jsp?refnum=DN2007036179');

See: "The attributes of Tags" in the BS docs.

Then you can use string functions(preferable) or a regex to get
everything between the parentheses(remove the quotes around the path,
too)


From darcy at druid.net  Fri May  2 00:44:16 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 00:44:16 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87abj91j8u.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <20080502004416.94012685.darcy@druid.net>

On Fri, 02 May 2008 13:24:01 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> I much prefer "#! /usr/bin/python" because I want my Python programs
> to, by default, be run with the default Python, and depend on Python
> being installed by the operating system's package manager. On systems
> that use shebang lines and that actually have standardised filesystem
> locations, the default Python is found at '/usr/bin/python'.

You have lived a sheltered life.  Not every packaging system puts the
executible in /usr/bin.  Many systems use /usr/local/bin.  NetBSD
uses /usr/pkg/bin but allows you to define your own pkg root.
Using /usr/bin/env allows your code to run on all these systems.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From mattheww at chiark.greenend.org.uk  Sun May 25 09:11:08 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 14:11:08 +0100 (BST)
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
Message-ID: <4ob*BLLds@news.chiark.greenend.org.uk>

Diez B. Roggisch <deets at nospam.web.de> wrote:
>Sebastian 'lunar' Wiesner schrieb:
>> I guess, Apache does some kind of memory caching for files, which are often
>> requested and small enough to fit into the system memory.  May be, that's
>> what the OP is referring to ...

> I'm not aware of that, and I even more seriously doubt it. Because 
> caching is a complicated, domain-dependend subject that would 
> *immediately* cry for configuration - e.g. caching strategies and such.

This is available in current apache with mod_file_cache (for an
explicitly configured list of files). I think the circumstances where
you'd want to use it are quite rare.

-M-


From castironpi at gmail.com  Sat May 10 11:06:11 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 08:06:11 -0700 (PDT)
Subject: Now, as for the jokes: Python!
Message-ID: <c2eac462-3fcf-4c57-bb13-8d24082889ab@r66g2000hsg.googlegroups.com>

Dear Monty, Grail This.

The grail is unarmed and floating.  Stop posting the newsgroup.

Python is Monty Python.  In the sense of identity ascription, of
course.

Trivially not,

A Bartender.


From paul at boddie.org.uk  Wed May  7 06:27:20 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 03:27:20 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <d33ec9cb-5017-4b12-9790-c7c936338a4f@b64g2000hsa.googlegroups.com>

On 6 Mai, 11:43, Max M <m... at mxm.dk> wrote:
>

[Python Midi]

> It does not have real time support even though I did write it with that
> support in mind. I just never got around to write it as I did not need
> it myself.
>
> I also developed it on Windows and I found it to be a bore to get real
> time midi working.
>
> It would probably be easier now that I am on Linux.

I was previously quite interested in getting MIDI output working for a
game I wrote, and I suppose that the Python Midi package would have
been of interest (with pygame probably handling the interface to the
hardware), but given the bizarre kernel module gymnastics required to
support real-time output (and I still don't know if my sound hardware
actually supports MIDI directly or not), I decided in the end to use
timidity to generate normal audio files and to send those through the
sound system instead. Of course, that more or less eliminates any real-
time aspects.

Paul


From CLDWesterhof at gmail.com  Sat May  3 06:05:31 2008
From: CLDWesterhof at gmail.com (Decebal)
Date: Sat, 3 May 2008 03:05:31 -0700 (PDT)
Subject: How to use a parameter in a class
Message-ID: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>

I have the following class:
#####
class Dummy():
    value = 0
    def __init__(self, thisValue):
        print thisValue
        self.value = thisValue
        value = thisValue

    def testing(self):
        print 'In test: %d' % self.value

    def returnValue(self):
        return self.value

    result = someFuntion(default = value)
#####

But the last line does not work.
I would like to do a call like:
    dummy = Dummy(thisValue = 12)

And that someFunction gets a default value of 12. How can I do that?


From mediocre_person at hotmail.com  Fri May  2 15:14:17 2008
From: mediocre_person at hotmail.com (Nick J Chackowsky)
Date: Fri, 02 May 2008 14:14:17 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <32a12$481b6809$3524@news.teranews.com>

TkNeo wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>> TkNeo wrote:
>>> WHAT ?
>>> This is crazy
>> Crazy like a fox?
>>
>> a = [1, 2, 3]
>> try:
>>      a.index(99)
>> except:
>>      a.append(99)
>> finally:
>>      print a.index(99)
>>
>> MY question: which exception should I actually be catching there?
>> ** Posted fromhttp://www.teranews.com**
> 
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.
But -1 is a valid index in Python.
a = [1, 2, 3]
print a[-1]
** Posted from http://www.teranews.com **


From fetchinson at googlemail.com  Wed May 21 12:33:48 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 09:33:48 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <48343e56$0$5866$426a74cc@news.free.fr>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
Message-ID: <fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>

>>> Or just:
>>>
>>> If command is "quit" ...
>>
>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>> for assigning and checking types.  For example, to read data from a
>> file and check for errors:
>>
>>      Read data from "input.txt".
>>      If data is an error then go to ...
>
> Arf ! A goto !

You are surely aware of the fact that the C source of python also uses
goto at tons of places. Is that Arf! too?

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From nicolas.dandrimont at gmail.com  Sat May 10 17:13:10 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Sat, 10 May 2008 23:13:10 +0200
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <20080510211310.GA24788@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-10 13:59:37 -0700]:

> If you are in the interactive prompt of the Python interpreter and you
> do this
> 
> print """Testing\"""   or   print '''Testing\'''
> 
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key;

That is because Python expects you to end the triple-quoted string with
three unescaped quotes.

> you have to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
> 
> [1]+  Stopped                 python
> 

That ^Z just suspends your Python interpreter. It has become a job you can
now bring to foreground again with "fg". (but it's a feature of your
shell, not of Python)

> 
> If you do
> 
> print "Testing\"   or   print 'Testing\'
> 
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?

The fact is, that triple-quoted strings can span on multiple lines, and
that single-quoted strings cannot (without the line ending with a "\").
So no, it's not a bug in the interpreter.

Regards,
-- 
Nicolas Dandrimont

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From bruno.desthuilliers at gmail.com  Thu May 15 16:58:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 13:58:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com> 
	<e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com>
Message-ID: <d24568a8-ce7c-473b-b059-1edf41f6ffee@b64g2000hsa.googlegroups.com>

On 15 mai, 19:30, Lie <Lie.1... at gmail.com> wrote:
> On May 15, 4:08 am, "bruno.desthuilli... at gmail.com"
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > > single language compiler instead of three dimensional compiler that
> > > > GCC is (cross platform, cross target platform, cross language).
>
> > > And to add, I also need to mention that Python doesn't need to be
> > > compiled at all,
>
> > No language needs compilation - it's an implementation problem, not a
> > language problem. Now all the Python's implementations I know do use
> > compilation (to byte-code).
> > > its py and pyo file is architecture independent.
>
> > True, but this is not strictly related to being compiled or not.
>
> It's true, it's implementation problem whether a language is compiled
> or not, but what I was emphasizing was that Python's code is
> architecture independent at all stages (that is visible to the user
> and the programmer), on the other hand, a compiled code is a compiled
> code is a compiled code,

Ever wondered what all these .pyc files were ?

> it cannot be architecture independent without
> packing multiple binaries in the same executable (like in Macintosh's
> universal binary) or using an emulation (with huge overheads) or at
> least using a compatibility layer (which doesn't always work) and all
> this is done in the layer that is visible to user and programmer
> (programmer having to compile against everything and user having to
> download the correct executable) instead of being done in a platform
> independent way that interpreted language like Python have.

Python is not interpreted, because being interpreted is a feature of
an implementation, not of a language. And so far, no known Python
implementation is (strictly speaking) interpreted - they all compile
to byte-code. "compiled" doesn't necessarily imply "compiled to
platform native binary code", you know.

Ok, this may look like a bit on the splitting hairs side. But may I
remind you that to run ever a .pyc file, you do need to have the
Python runtime (VM + quite a lot of libs) installed one way (normal
install) or another (packed in something that looks like an ordinary
"executable" - whatever this means for the target platform) ? OTHO,
it's true that a .pyc file is platform-independant  - it just requires
the correct versions of quite a lot of platform-dependant binaries.
Wait... Isn't this code some kind of a "visible to the user and
programmer" "compatibilty layer" ?



From nik600 at gmail.com  Tue May 27 04:50:00 2008
From: nik600 at gmail.com (nik600)
Date: Tue, 27 May 2008 10:50:00 +0200
Subject: integration with browser
In-Reply-To: <6a0722F33j3q5U1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
Message-ID: <9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>

On Mon, May 26, 2008 at 6:32 PM, Diez B. Roggisch <deets at nospam.web.de> wrote:
> nik600 wrote:
>
>> Both win and linux if possible i don't have preference for gui. Thanks
>
> Qt4 now contains the WebKit html widget.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>
Thanks but the problem about using something different between IE of
FF is that the css and javascript management is different.

Web developers usually check only 3 browser
IE
FF
Opera

I know that using an external engine limits the portability of the
solutions, but i need something that works exaclty as the browser.


-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From tjreedy at udel.edu  Sun May 25 21:34:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:34:50 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <g1d43p$g2j$1@ger.gmane.org>


"Joe P. Cool" <joe.p.cool at googlemail.com> wrote in message 
news:09847cfc-eaec-4adc-8cbf-1e2ebbf940c4 at m44g2000hsc.googlegroups.com...
| Actually it is very useful to be able to  distinguish
| between inside and outside.

Which Python allows one to do.

| This is obvious for real world things e.g. your
| TV. Nobody likes to open the rear cover to switch the channel.

The original issue was that users might open the case to do something 
unplanned and that they would come to depend on and clamor for the 
maintenance of internal details that the manufacturer wants to change.  But 
in the real world, most customers know and accept that custom alterations 
and extensions of a product my be model specific.  Some things I buy even 
have a disclaimer that user-visible details might be different from what 
the instructions say, and only guarantee that the functionality will be as 
good or better than specified.

[...]
| Please don't sell a missing feature as a philosophy.

I won't if you don't claim that a feature is missing because you don't like 
its implementation.  To most of us, replacing the nearly never used '__' 
with a keyword would be a auful change.

| Please don't tell me that encapsulation does not mean "enforced 
restriction".

There are obviously degrees of enforced restriction.  Take your TV example. 
Most users will respect a 'do not open' request by the manufacturer 
(Python's '_'.).  But some will unscrew anyway.  So some makers use 
fasteners that are resistent to opening without specialized tools from 
specialized sources -- or perhaps specialized knowledge (Python's '__'). 
(This is very frustrating if one needs to open such a system.)  Or some 
mark the screws so they can detect and punish entry.  At least one (Apple) 
has intentionally altered internals to punish entry and alteration.  Or 
there is the 'embed in epoxy' method.

If you want something equivalent to epoxy embedding, design it, implement 
it, and share it (if you want).  Perhaps one could make an Opaque extension 
class, perhaps even usable as a mixin class rather than as a single-base 
class.

Terry Jan Reedy





From pecora at anvil.nrl.navy.mil  Fri May  9 11:14:34 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 May 2008 11:14:34 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.815.1210287883.12834.python-list@python.org>
Message-ID: <pecora-28D003.11143409052008@ra.nrl.navy.mil>

In article <mailman.815.1210287883.12834.python-list at python.org>,
 Michael Torrie <torriem at gmail.com> wrote:

> wxPythoner at gmail.com wrote:
> > Have a look at this:
> > 
> >>>> -123**0
> > -1
> > 
> > 
> > The result is not correct, because every number (positive or negative)
> > raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> No python is correct.  you're expression parses this way, when converted
> to a lisp-ish prefix expression:
> 
> (- (123 ** 0 ))

Yeah, it's just the standard parser.  For other situations Python does 
fine.  E.g.

In [1]: x=-1

In [2]: x**0
Out[2]: 1

-- 
-- Lou Pecora


From mishok13 at gmail.com  Thu May  8 03:56:50 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Thu, 8 May 2008 10:56:50 +0300
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
References: <48215537.100@promsoft.ru>
	<mailman.695.1210147319.12834.python-list@python.org>
	<3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
Message-ID: <192840a00805080056g25dd98cu9b01545235f402c@mail.gmail.com>

2008/5/8 Tim Roberts <timr at probo.com>:
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>
>  >2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
>
> >> Subj is bag?
>  >>
>  >>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
>  >> (Intel)] on win32
>  >>  Type "help", "copyright", "credits" or "license" for more information.
>  >>  >>> from datetime import datetime
>  >>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>  >>  '2008_05_07 12_30_22.csv'
>  >>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>  >>  Traceback (most recent call last):
>  >>   File "<stdin>", line 1, in <module>
>  >>  TypeError: strftime() argument 1 must be str, not unicode
>  >
>
> >Unicode and str objects are not the same. Why do you think that this
>  >is a bug?
>
>  I think that's a perfectly reasonable thing to expect.  At the risk of
>  over-generalization, there is no good reason why, by this point in time,
>  all of the standard library routines that accept strings shouldn't also
>  accept Unicode strings.
>
>  It's the duck typing principle.  Unicode strings look, walk, and talk like
>  regular strings.  An error like this is not intuitive.

On a second thought -- both of you (you and Alexander) are right. I
changed mind and posted a bug on Roundup already (bug #2782).

>  --
>  Tim Roberts, timr at probo.com
>  Providenza & Boekelheide, Inc.
>
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From fetchinson at googlemail.com  Tue May 13 13:59:35 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Tue, 13 May 2008 10:59:35 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
	<87d4nqgllh.fsf@physik.rwth-aachen.de>
	<5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>
Message-ID: <fbe2e2100805131059x5569e51pd45de2effd67b60@mail.gmail.com>

Hi Dave,

Flaming Thunder looks interesting especially the fact that you claim to have
maintainable multi-platform assembler code. Does this mean that if in the
next 3 years a new processor architecture comes out you will be able to port
your assembler code easily? Can you give us more detail about this? I also
have some assembler code which works on 32-bit x86 architectures but porting
that to 64-bit is already non-trivial, I mean has to be done by hand. Unless
you have an automatic tool to do these things.

About pricing: what led the company to pick this particular business model?
Have you considered other options? Like releasing the source as GPL or
something similar and offering technical support for money, training
developers or selling of support material like documentation, etc?

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown
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From bignose+hates-spam at benfinney.id.au  Sun May 11 18:44:19 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 08:44:19 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <87mymw8nr0.fsf@benfinney.id.au>

John Salerno <johnjsal at gmailNOSPAM.com> writes:

> num = 33
> 
> for x in xrange(10):
>     print num += 1

Which is better done by 'num += 10'.

Can you come up with an example that isn't trivially replaced with
clearer code? That might make it clearer what your concern is.

> The [above] example [...] is simply doing something 10 times, and
> what it's doing has nothing to do with 'x' or xrange. So it seems
> like an abuse of the for loop.

In such cases, the name 'dummy' is conventionally bound to the items
from the iterator, for clarity of purpose::

    for dummy in range(10):
        # do stuff that makes no reference to 'dummy'

Also note that 'range' will return an iterator (not a list) in Python
3.0, and 'xrange' is removed since it's then obsolete
<URL:http://www.python.org/dev/peps/pep-3100/#built-in-namespace>.

-- 
 \          ?Isn?t it enough to see that a garden is beautiful without |
  `\      having to believe that there are fairies at the bottom of it |
_o__)                                             too?? ?Douglas Adams |
Ben Finney


From stef.mientki at gmail.com  Sat May 10 19:18:29 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sun, 11 May 2008 01:18:29 +0200
Subject: how to reference my own module ?
In-Reply-To: <g058jk$jcb$1@ger.gmane.org>
References: <4825F6BB.9090707@gmail.com> <g058jk$jcb$1@ger.gmane.org>
Message-ID: <48262D45.7000803@gmail.com>

Terry Reedy wrote:
> "Stef Mientki" <stef.mientki at gmail.com> wrote in message 
> news:4825F6BB.9090707 at gmail.com...
> | hello,
> |
> | I've a library that I import as
> |
> |    import ppygui.api as gui
> |
> | the reason for this construct is that I've to use different libraries
> | for different platforms.
> |
> | Now I like to write some examples in the library (activated by if
> | __name__ == '__main__' :)
> | and I would that these examples can be used in the user program just by
> | copy / paste.
> |
> | For calling a function / class in the user program I've to write:
> |
> |    sizer = gui.VBox ()
> |
> | So also write exactly the same sentence in the library examples,
> | but  "gui" is not recognized
> |
> | Any ideas how I can realize the above ?
>
> Put the import statement in the example so 'gui' *is* recognized ;-)
>
> If I understand what you meant ...
> xploro/test/begin.py
> -----------------------------
> def start():
>     print('hello')
>
> if __name__ == '__main__':
>     import xploro.test.begin as etb
>     etb.start()
> ----------------------------
> prints 'hello'|
>
> Import is a name-binding statement that also creates a module when it does 
> not exist already.  Modules can be bound to multiple names just like any 
> other object.
>   
Thanks Terry,
works like a charm,
why is the obvious often so difficult overlooked ;-)

cheers,
Stef
> Terry Jan Reedy
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From ohad911 at gmail.com  Wed May 21 10:45:21 2008
From: ohad911 at gmail.com (ohad frand)
Date: Wed, 21 May 2008 17:45:21 +0300
Subject: problem with import / namespace
In-Reply-To: <483427BF.6030805@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
Message-ID: <b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>

Hi
Thanks for the answer.
I probably didnt write the problem accurately but it is not as you
described.
(i already read before the section that you pointed and it didnt help me)
the problem is that i dont want to import a file from different directory
but only from the same directory.
\\1\tmp2.py imports \\1\tmp1.py
\\2\tmp2.py imports \\2\tmp2.py
but when i execute the following script in the interpreter i get that the
second tmp2.py file imports not the file from the same directory but the
file that was already imported by the first executed tmp2.py file.
the shell script is:
>>> import os
>>> os.chdir("c:\\1")
>>> execfile("tmp2.py") <- here the executaion is OK
>>> os.chdir("c:\\2")
>>> execfile("tmp2.py") <- here the execution is not ok because tmp2.py file
imports the tmp1.py file from c:\\1 which is not OK

in between those two execfile commands i tried to do a lot of things but
every time python imported the incorrect file for the second execution. (i
am not building a package and those names are just examples for the problem,
i am not really using 1 and 2 names as dirs)

I hope that this time i am more understood

Thanks again
Ohad


On Wed, May 21, 2008 at 4:46 PM, Laszlo Nagy <gandalf at shopzeus.com> wrote:

> ohad frand wrote:
>
>> Hi
>> I have a problem that the solution to it must be very simple but i couldnt
>> fint it's answer in the internet so far (i searched for couple of days)
>> the problme is as follows:
>>
>> i have two directories e.g. "\\1" and "\\2"
>> in each directory i have two files with the same names e.g. "tmp1.py" and
>> "tmp2.py"
>>
>
> So this is what you have:
>
> /1/tmp1.py
> /1/tmp2.py
> /2/tmp1.py
> /2/tmp2.py
>
>  each tmp2.py file imports tmp1 from its same directory (import tmp1) -
>> thats the problem
>> if i execute one file (\\1\tmp2.py) than the execution is ok
>> but when i try after that to execute the second file (\\2\tmp2.py) than
>> the tmp1 file from the wrong directory ( - directory 1 in this case) is
>> imported instead.
>>
>
> When you try to import a module, python starts to search for it. The was it
> does the search is very well defined. It mostly depends on the current
> directory and sys.path. You can read more about this here:
>
> http://docs.python.org/tut/node8.html#searchPath
>
> This is very basic thing - you should read and go through the tutorial
> before asking questions like this. :-)
>
>  i tried many things to try to solve it, i removed the previous path from
>> sys.path and added the new one, i tried to change current working directory
>> with os.chdir()
>> I tried to delete from locals and from globals the name tmp1 before
>> running the second file but nothing worked.
>> please help
>>
> The problem is still not well defined. Python works as expected and
> documented, but apparently you do not know how to import 1/tmp2.py from
> 2/tmp1.py.  There are several ways to do it, and we cannot tell which one is
> correct. It depends on what are these modules for.
>
> Here are the solution that you would use (most likely) as a beginner:
>
>
> #1 first, rename your "1" and "2" directories to "one" and "two". If you
> are creating a package with modules, then you have to define the package's
> name with its directory. Since identifiers cannot begin with digits in
> Python, you need to use an identifier-like name for your subdirs. It is a
> good idea anyway. A package name called "1" would tell nothing about what it
> does?
> #2 place your main application in /app/app.py
> #3 create /app/one/__init__.py and /app/two/__init__.py files (they can be
> empty)
> - inside your app.py file either make sure that the current dir is /app, or
> insert /app in the first place in sys.path
>
>
> Then for example, inside two/tmp1.py you can do this:
>
>
> import one.tmp1
> import one.tmp2
> import two.tmp1
>
> one.tmp1.somefunc()
> two.tmp1.somefunc()
>
>
> You got the idea.
>
>   Laszlo
>
>
>
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From castironpi at gmail.com  Thu May  8 01:27:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 22:27:43 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
Message-ID: <b760601e-2e02-4dbe-9f05-7de3f305ffba@34g2000hsh.googlegroups.com>

On May 7, 11:02?pm, krustymon... at gmail.com wrote:
> I'm wondering if anyone can help with a workaround for a problem I
> currently have. ?I'm trying to set up a prefork tcp server.
> Specifically, I'm setting up a server that forks children and has them
> listen on pipes created with os.pipe(). ?The parent process for the
> group starts an inet:tcp server on a given port. ?In the parent, after
> a "socket.accept()", I'm trying to pickle the connection object to
> send over an IPC pipe (as stated previously), but I get the following
> error:
>
> File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> ? ? raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining
> __getstate__ cannot be pickled
>
> Does anyone know of a workaround for this? ?Maybe my approach to this
> is wrong? ?Any help would be appreciated.
>
> Jay

The group currently holds that pickling socket objects is non-optimal
to the ends of making money.  We can tell you good ways to accomplish
what you set out to do all the same.  I find it educational; that's
fine in my book.  Part of the resistence comes from a resistence to
monarchy.  The bottleneck is the starting of a second Python process.

There are a number of objects which can't be pickled, though.  If you
can objectively prioritize the next step in pickling sockets, you may
find out sooner when it will come in to Python.  But that's the hard
part; speaker recommends against.

We accept your idea is to get a process around the socket barrier.
Can you close the server in Part N, hear the connection in Part N+1,
spawn a new server in N+2, and handle the first one in N+3?  Is it
suitable to your minds?


From castironpi at gmail.com  Mon May  5 23:14:05 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 20:14:05 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>
Message-ID: <3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>

On May 5, 6:40?pm, castiro... at gmail.com wrote:
> On May 5, 1:26?pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
>
>
>
>
>
> > Hi there. ?Maybe a little more context would
> > help us figure out what you want here...
>
> > On May 5, 1:28 pm, castiro... at gmail.com wrote:
>
> > > Is multimap just a syntax-checked dictionary of mutable sequences?
>
> > I think the equivalent of a multimap can be
> > implemented several different ways, depending on
> > what you need:
>
> > ? for
> > ? ? ? ?1 maps to 2,3
> > ? ? ? ?5 maps to 7
> > ? - dictionary mapping to lists
> > ? ? ? ?{ 1:[2,3], 5:[7] } # supports unhashable values
> > ? - dictionary mapping to dictionary
> > ? ? ? ?{ 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
> > and dense data
> > ? - dictionary with tuple/pairs as keys
> > ? ? ? ?{ (1,2):None, (1,3):None, (4,7):None } # streamlined for
> > existence testing
>
> It's possible there are four different kinds of multimaps.
>
> objects map to set
> objects map to frozenset
> objects map to sequence
> frozenset maps to object
>
> What does the STL use? ?I am interested in a serialization that
> changes certain bits and appends more. ?Prior discussion brought me to
> multimap, but that quotient stifled it.
>
> > If you search usenet (google groups) for multimap
> > you will find some nice discussions by Alex Martelli and others.
>
> > > Is def( a ): a[:]= [x] a trick or part of the language? ?It looks
> > > pretty sharp in variable-width.
>
> > You lost me here.
>
> I was referring to a couple of threads from the Winter [cit. off'd.]
> that never really gelled.
>
> Modifying parameters is crucial to a number of control flow structures
> (program divisions). ?Examples could come handy.

I am questioning if value-succession is a sufficient protocol to side
effects.

Fibonacci numbers are formulaic.  Month names are tabular.  Factorials
are recursive.  Hold there is no use for a factorial generator, i.e.
no factorials in business.  Things the real world generates are
network requests of a station, successive graphics (though so far only
for games*), month names (and other units of time), produce, and
dollar values in the form of prices.

* Information display isn't the top of the market.

Simple matching that's hard to explain in a formal language can yield
scheduling, value, opinion.  It is not clear that art or architecture
have tender/vital value.  I.e., it's possible that the only value of
computers is automation in a system that is already pretty fine at
food, utilities, and walls.

If recursive generators are really useless (erect wall might not be),
there's no jobs in looking in to it.  Which brings me to persistence
of generators juxtaposed to merely persistence of functions.
Sequences could map into a database pretty easily, in a line or less,
if deque/set/dict (i.e. non-sequential) don't modify easily on disk,
what's the function that allocates in a database?

> >>> def a( x ): x[:]= [x[0]+ 1]
> ...
> >>> b= [2]
> >>> a(b)
> >>> b
>
> [3]



From cjw at ncf.ca  Thu May  8 08:55:36 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 08:55:36 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
Message-ID: <fvut8a$b67$1@theodyn.ncf.ca>


The readme.txt has:

All you need to do is open the workspace 
"pcbuild.sln" in Visual Studio,
select the desired combination of 
configuration and platform and eventually
build the solution. Unless you are going 
to debug a problem in the core or
you are going to create an optimized 
build you want to select "Release" as
configuration.

Unfortunately, the Express Edition 
(Free) doesn't handle "solution" files.

Installed Edition: VC Express

Microsoft Visual C++ 2008 
91909-152-0000052-60812
Microsoft Visual C++ 2008


Does anyone have any advice for a person 
who has limited C++ experience and none 
with the Visual C++ please?

Colin W.


From unknown_hero007 at hotmail.com  Fri May  9 08:36:59 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 05:36:59 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com>
Message-ID: <3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com>

Ah, never mind, got it to work. Here's the code now. I hope I won't
run into another problems later :D


<code snippet>
#Goes through all keys and subkeys in the selected hive (defined as
root) and replaces the value 'old' with the value 'new'
#
#IMPORTANT! You should always back up the registry before attempting
to modify it.
#The author of this script CANNOT BE HELD RESPONSIVE for any damage
caused by running this script.
#
#To customize the script to your liking, you can alter the values old,
new, root.
#
#old and new can be any string value
#root has to be one of the following:
#
# _winreg.HKEY_LOCAL_MACHINE
# _winreg.HKEY_CURRENT_USER
# _winreg.HKEY_CLASSES_ROOT
# _winreg.HKEY_USERS
# _winreg.HKEY_CURRENT_CONFIG

import _winreg #For accessing windows registry, included in Python
2.0.
import sys #For reading arguments (command line), included in every
Python release.

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
}


class RegKey:

  def __init__ (self, name, key):
     self.name = name
     self.key = key

  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.

  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  try:
    if "\\" not in top: top += "\\"
    root, subkey = top.split ("\\", 1)
#    print "KEY:", root + "\\" + subkey
    key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)
    subkeys = []
    i = 0
    while True:
      try:
        subkeys.append (_winreg.EnumKey (key, i))
        i += 1
      except EnvironmentError:
        break

    values = []
    i = 0
    while True:
      try:
        values.append (_winreg.EnumValue (key, i))
        i += 1
      except EnvironmentError:
        break

    yield RegKey (top, key), subkeys, values

    for subkey in subkeys:
      for result in walk (top + "\\" + subkey):
        yield result

  except WindowsError:
#    print 'Could not open key', root + "\\" + subkey + ", access
denied!\n"
    pass

  except:
    print 'Other error!'


def main(start, startHandle, old, new):
  basickeys = []
  i = 0
  while True:
    try:
      basickeys.append (_winreg.EnumKey (startHandle, i))
      i += 1
    except EnvironmentError:
#      print i, 'subkeys found!'
      break

  for x in range(len(basickeys)):
    for key, subkey_names, values in walk (start + "\\" +
basickeys[x]):
#      print key
      for (name, data, type) in values:
#        print "  ", name, "=>", data
        if type == _winreg.REG_SZ:
          Character = 0
          Correct = 0
          FoundStart = FoundEnd = 0
          Found = False
          for y in range(len(data)):
            try:
              if Character < len(old):
         #       print old[Character], data[y]
                if old[Character] in data[y]:
                  Character = Character + 1
                  Correct = Correct + 1
            except:
              pass
          if Correct is len(old):
#            print 'Debug!'
            Replace = ""
            Character = 0
            for y in range(len(data)):
              if not Found:
                if old[0] in data[y]:
                  FoundStart = int(y)
                  FoundEnd = FoundStart + len(old)
                  Found = True
#            for y in range(FoundStart):
#              Replace = Replace + data[y]

            for y in range(len(new)):
              Replace = Replace + new[y]

#            for y in range(FoundEnd, len(data)):
#              Replace = Replace + data[y]
            Found = True
          if Found:
#            print "OLD:", old, "will be replaced with:", Replace
            _winreg.SetValueEx (key.key, name, 0, type, data.replace
(old, Replace))


def help():
  #Show help
  print 'USAGE: Registry.py [HIVE] [OLD] [NEW]'
  print '  HIVE: The root key in registry you want to go through.'
  print '    HKEY_CLASSES_ROOT'
  print '    HKEY_CURRENT_USER'
  print '    HKEY_LOCAL_MACHINE'
  print '    HKEY_USERS'
  print '    HKEY_CURRENT_CONFIG'
  print ''
  print '  OLD:  The value to search for.'
  print '    Wrap multiword strings with \"\".'
  print ''
  print '  NEW:  The value which will replace OLD.'
  print '    Wrap multiword strings with \"\".'

#Check for arguments
#HIVE, old, new

while True:
  #Check if invalid number of arguments are given
  if len(sys.argv) is 1:
    help()
    break

#  for x in range(len(sys.argv)):
#    print 'sys.argv[' + str(x) + ']:', sys.argv[x]

  #Check if hive is first
  if sys.argv[1].upper() in ('HKEY_CURRENT_USER',
                             'HKEY_LOCAL_MACHINE',
                             'HKEY_CLASSES_ROOT',
                             'HKEY_USERS',
                             'HKEY_CURRENT_CONFIG'):

    start = sys.argv[1].upper()

  else:
    help()
    break

  #Check that not only one argument is given (at least two required,
preferably three)
  if len(sys.argv) is 2:
    help()
    break

  old = sys.argv[2]

  if len(sys.argv) is 4:
    new = sys.argv[3]

  else:
    help()
    break


  if start in ('HKEY_CLASSES_ROOT'):
    startHandle = _winreg.HKEY_CLASSES_ROOT

  elif start in ('HKEY_CURRENT_USER'):
    startHandle = _winreg.HKEY_CURRENT_USER

  elif start in ('HKEY_LOCAL_MACHINE'):
    startHandle = _winreg.HKEY_LOCAL_MACHINE

  elif start in ('HKEY_USERS'):
    startHandle = _winreg.HKEY_USERS

  elif start in ('HKEY_CURRENT_CONFIG'):
    startHandle = _winreg.HKEY_CURRENT_CONFIG

  else:
    help()
    break

  main(start, startHandle, old, new)
  break
</code>


From nyamatongwe+thunder at gmail.com  Mon May 26 05:12:05 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 26 May 2008 09:12:05 GMT
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <F9v_j.4725$IK1.3486@news-server.bigpond.net.au>

Russ P.:
> The encapsulation wouldn't be as
> airtight as "private" in C++, so clients could still get access ...

    C++ private is not airtight as you have access to pointer arithmetic 
as well as
#define private public

    Neil


From skanemupp at yahoo.se  Wed May  7 17:49:24 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:49:24 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<81addfb5-254f-4a2b-a2bc-044592cee07f@p25g2000hsf.googlegroups.com>
Message-ID: <080475c4-f5b3-4445-8c64-f99f82b87aac@b64g2000hsa.googlegroups.com>

On 7 Maj, 23:47, globalrev <skanem... at yahoo.se> wrote:
> and what si the diffrence here:
>
> g = lambda x=5:x*x
> g = lambda x:x*x
>
> the first was a mistake to write but it worked
> and the x=5 seems to be completely ignored. why? it has no effect at
> all?

ah wait now i see it has a default kind of then. g() returns 25 while
g(8) returns 64.


From arnodel at googlemail.com  Wed May 28 16:48:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 21:48:54 +0100
Subject: Writing a function from within Python
References: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>
Message-ID: <m27ide40jt.fsf@googlemail.com>

Aaron Scott <aaron.hildebrandt at gmail.com> writes:

> Is it possible to change the content of a function after the function
> has been created? For instance, say I make a class:
>
> 	class MyClass:
> 		def ClassFunction(self):
> 			return 1
>
> And I create an object:
>
> 	MyObject = MyClass()
>
> Is there any way to change the content of the function, a la pseudo-
> code:
>
> 	MyObject.ClassFunction = "return 2"

Yes there is:

>>> class Foo(object):
...    def __init__(self, x):
...        self.x = x
...    def bar(self):
...        return self.x
... 
>>> foo = Foo('spam')
>>> foo.bar()
'spam'
>>> from types import MethodType
>>> def newbar(self):
...     return self.x + ', yummy!'
... 
>>> foo.bar = MethodType(newbar, foo)
>>> foo.bar()
'spam, yummy!'


HTH

-- 
Arnaud


From castironpi at gmail.com  Tue May 20 09:27:25 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:27:25 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g0uec3$cai$1@news.al.sw.ericsson.se>
Message-ID: <d571756f-4102-4430-bb13-579e907a0639@d77g2000hsb.googlegroups.com>

On May 20, 6:57?am, Wolfgang Grafen <wolfgang.gra... at ericsson.com>
wrote:
> globalrev schrieb:
>
>
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Your example is comprehensive compared to many other suggestions which
> is an advantage IMO. I minimised it further
>
> for i in range(start, stop, step):
> ? ? ?if not i%15:
> ? ? ? ? ?print "FizzBuzz"
> ? ? ?elif not i%3:
> ? ? ? ? ?print "Fizz"
> ? ? ?elif not i%5:
> ? ? ? ? ?print "Buzz"
> ? ? ?else:
> ? ? ? ? ?print i
>
> Best regards
>
> Wolfgang- Hide quoted text -
>
> - Show quoted text -

This one eliminates the modulo operation.

dyn= list( xrange( 1, 101 ) )
for i in xrange( 1, len( dyn ), 3 ):
	dyn[ i ]= ''
for i in xrange( 1, len( dyn ), 5 ):
	dyn[ i ]= ''
for i in xrange( 1, len( dyn ), 3 ):
	dyn[ i ]+= 'Fizz'
for i in xrange( 1, len( dyn ), 5 ):
	dyn[ i ]+= 'Buzz'
for d in dyn:
	print d

Can we compare?


From nyamatongwe+thunder at gmail.com  Sun May 11 04:22:20 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 11 May 2008 08:22:20 GMT
Subject: Any other UI kits with text widget similar to that in Tk?
In-Reply-To: <mailman.915.1210448402.12834.python-list@python.org>
References: <mailman.915.1210448402.12834.python-list@python.org>
Message-ID: <01yVj.94$IK1.36@news-server.bigpond.net.au>

Kenneth McDonald:
> I'm wondering if any of the other GUI kits have a text widget that is 
> similar in power to the one in Tk.

    The main text widget in GTK+ was modeled after Tk but I don't know 
how well it succeeded in implementing this.

    Neil


From a_jtim at bellsouth.net  Tue May 13 07:25:59 2008
From: a_jtim at bellsouth.net (Tim Arnold)
Date: Tue, 13 May 2008 04:25:59 -0700 (PDT)
Subject: using PIL for good screenshots
References: <g0adou$1us$1@foggy.unx.sas.com>
	<mailman.1011.1210637478.12834.python-list@python.org>
Message-ID: <e606febc-aa25-45a0-971d-47fe75a93432@a23g2000hsc.googlegroups.com>

On May 12, 8:11?pm, pyt... at bdurham.com wrote:
> Tim,
>
> Sounds like an interesting project.
>
> Have you considered using SnagIt to produce your screenshots?www.TechSmith.com/SnagIt
>
> Malcolm

Thanks for the interest on this, but I don't control what the writers
use to get the screenshot. They give me a 8-bit png screenshots
(sometimes 24-bit) captured at 96 dpi. The part I can control comes
after that--I need a workflow for getting the screenshot into print,
looking as good as possible.

thanks,
--Tim Arnold



From paul.hankin at gmail.com  Fri May  9 11:09:58 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 9 May 2008 08:09:58 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <2bbcd24b-d36d-47dd-a0fa-4d7333e85fef@a23g2000hsc.googlegroups.com>

On May 9, 10:10?am, dannywebs... at googlemail.com wrote:
> Hello all,
>
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo'). ?I need to grab the previous
> iteration if this condition is met. ?I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

Often when you're iterating, 'hacky' code can be lifted out into a
separate generator, keeping the details of the hacks nicely away from
your code. That's true here...

def iterprevious(seq):
    """Generate pairs of (previous element, current element)
    from seq."""
    last = None
    for x in iter(seq):
        yield last, x
        last = x

Then, when you want use it...

for previous, (key, value) in iterprevious(d.iteritems()):
    ... In the loop, previous will either be None if we're on the
first element, otherwise (previous_key, previous_value).

--
Paul Hankin


From pavlovevidence at gmail.com  Sun May 11 21:52:48 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 11 May 2008 18:52:48 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
Message-ID: <f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>

On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> In such cases, the name 'dummy' is conventionally bound to the items
> from the iterator, for clarity of purpose::
>
>     for dummy in range(10):
>         # do stuff that makes no reference to 'dummy'

Is this documented?  I've never heard of this convention.  It's not
PEP 8, and I've never seen consistent usage of any name.  I'd be
interested in knowing where you read that this was a convention, or in
what subcommunities it's a convention in.

I think dummy is a terrible name to use for this, since in no other
usage I can think of does the word "dummy" suggest something isn't
used.  In fact, quite the opposite.  For example, the dummy_threads
module is most definitely used; the word dummy means that it's
stripped down.  Based on that, your usage of the symbol dummy above
would suggest to me that it's a value used in lieu of something else
(such as a calculated value).

In mathematics, a dummy argument another name for the independent
variable of a function (or more accurately, the symbol used to
represent it), which also doesn't match your usage.

If a value isn't used, then I think the most clear name for it is
"unused".


Carl Banks


From szrRE at szromanMO.comVE  Tue May 27 00:52:35 2008
From: szrRE at szromanMO.comVE (szr)
Date: Mon, 26 May 2008 21:52:35 -0700
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
	<358ec7c3-4a25-4591-a705-03446e074b20@25g2000hsx.googlegroups.com>
Message-ID: <g1g42k02miu@news4.newsguy.com>

j.oke wrote:
> On 26 Mag, 01:25, "xah... at gmail.com" <xah... at gmail.com> wrote:
>> For about the past 10 years, ...
>
> Q: How many comp.lang.X trolls does it take to change a light bulb?
>
> A: One, and Superman. One to hold the bulb, and Superman to screw the
> planet.

Are you saying Superman is harming the planet?  :-)

-- 
szr 




From skanemupp at yahoo.se  Fri May  9 19:53:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 16:53:15 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
Message-ID: <ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>

ty. that was the decrypt function. i am slo writing an encrypt
function.

def encrypt(phrase):
    pattern =
re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
    return pattern.sub(r"1\o\1", phrase)

doesnt work though, h becomes 1\\oh.


def encrypt(phrase):
    pattern =
re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
    return pattern.sub(r"o\1", phrase)

returns oh.

i want hoh.

i dont quite get it.why cant i delimit pattern with \


From dingo_1980 at yahoo.com  Mon May 12 20:53:51 2008
From: dingo_1980 at yahoo.com (dingo_1980 at yahoo.com)
Date: Mon, 12 May 2008 17:53:51 -0700 (PDT)
Subject: Sparse Matrix Multiplications
Message-ID: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>

I was trying to create a sparse matrix using scipy.sparse (100000 X
100000) with just the first row and first column filled with ones.
Lets call this matrix Asp. This is how I created Asp

from scipy import sparse
Asp = scipy.lil_matrix(100000,100000)
for i in range(100000):
   Asp[i,0] = i
   Asp[0,i] = i
Bsp = (Asp.tocsr())*(Asp.tocsr())

This multiplication to get Bsp is taking a long time (to the order of
over an hour). Is there some other way of storing such huge sparse
matrices and doing their multiplications or is this the most optimal
way?


From code at pizzashack.org  Sun May 18 15:43:54 2008
From: code at pizzashack.org (Derek Martin)
Date: Sun, 18 May 2008 15:43:54 -0400
Subject: python confusion possibly related to pickle
In-Reply-To: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
Message-ID: <20080518194354.GA27968@dragontoe.org>

On Sun, May 18, 2008 at 08:28:34PM +0100, Dennis wrote:
> The problem that's got me annoyed is that after getting said error I
> close the shell window, open a new one, run the python interpreter
> and type "import pickle" and get the error that the script I'd run
> earlier caused. Why is this ?

Well, what's the error?  Sounds like your system could be b0rked (or
at least your python installation)... but depending on the error,
there could be other explanations.  

-- 
Derek D. Martin
http://www.pizzashack.org/
GPG Key ID: 0x81CFE75D

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From usenet-nospam at well-adjusted.de  Thu May 29 16:41:38 2008
From: usenet-nospam at well-adjusted.de (Jochen Schulz)
Date: Thu, 29 May 2008 22:41:38 +0200
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
	<6a4oumF3464loU1@mid.uni-berlin.de>
Message-ID: <slrng3u582.2gr.usenet-nospam@well-adjusted.de>

* Marc 'BlackJack' Rintsch:
> On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:
>> Dennis Lee Bieber, the ghost:
>>
>>> I'd have to wonder why so many recursive calls?
>> 
>> Why not?
> 
> Because of the recursion limit of course.  And function call overhead in
> Python is quite high compared to an iterative approach.

One of my pet projects[1, it's about building and searching trees] made
heavy use of recursion in the beginning.  I rewrote parts of it using
iteration because I hit the recursion limit and suspected a performance
hit as well. To my (mild) surprise, the rewrite didn't perform
significantly better. My benchmarks only showed an improvement of a few
percent in runtime. I didn't measure memory usage, though.

J.

[1] http://well-adjusted.de/mspace.py/
    (Sorry, baerophile, I'll get back to you about this! My SNV working
    copy is currently a mess and I need to clean that up first.)

-- 
I feel yawning hollowness whilst talking to people at parties.
[Agree]   [Disagree]
                 <http://www.slowlydownward.com/NODATA/data_enter2.html>


From srp at ideadevice.com  Wed May 28 22:46:54 2008
From: srp at ideadevice.com (Saju Pillai)
Date: Thu, 29 May 2008 08:16:54 +0530
Subject: Any way to loop through object variables?
In-Reply-To: <483D8614.7000808@islandtraining.com>
References: <483D7A47.3030606@ecs.soton.ac.uk>
	<483D8614.7000808@islandtraining.com>
Message-ID: <7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>


On 28-May-08, at 9:49 PM, Gary Herron wrote:

> Dave Challis wrote:
>> Hi,
>> Just wondering if there's a way to iterate through all variables  
>> which
>> an object has set?
>>
>> Specifically, I'm using the OptionParser module, which returns an
>> options object, containing all command line options as object  
>> variables.
>> I'd like to iterate over these rather than getting at them by name.
>>
>> Cheers,
>> Dave
>
> For this object (and many others), you can get at the attributes  
> with the vars(...) builtin.
> It returns a dictionary of attribute names and values.


Also dir(object) will get you the list of attributes of that object.

-srp

>
>
> Gary Herron
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From gilly.dekel at gmail.com  Sun May  4 13:11:50 2008
From: gilly.dekel at gmail.com (Gilly)
Date: Sun, 4 May 2008 10:11:50 -0700 (PDT)
Subject: Real Time Midi File Playback - Reading and Writing midi at the same 
	time
Message-ID: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>

Hi
I am trying to create an application that uses some form of input to
create a midi file.
I would like for this to be a 'real time' process. In other words, I
want to be able to begin playing the midi file before I finish writing
it, and continue writing as it plays.

I would really appreciate any help possible on this matter.

Thanks!!


From deets at nospam.web.de  Tue May 27 11:24:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 17:24:04 +0200
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <6a2ndjF35q29pU1@mid.uni-berlin.de>

Sverker Nilsson wrote:

> I was talking about Guido van Rossum
> 
> The one who decides, so far when people agree
> 
> But we can make a new fork

Good luck with that. Weren't you the one concerned about changes in Py3K
that forced you to change your memory profiler? Now you want to introduce a
*third* codebase beside python2.x and python3.x? Interesting course of
action.
 
> He is the originator, but now it seems, for me, it is hanging out in
> the air

Why do you think so? Because you don't like Py3K?
 
> So we need some new leadership
> 
> From somebody, somebody like you perhaps. Or me.

Well - be my guest to form your own cult.

Diez


From castironpi at gmail.com  Thu May 15 22:30:48 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:30:48 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
	<37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com>
Message-ID: <e717c110-7544-4028-89c4-b37efdd7d61d@a23g2000hsc.googlegroups.com>

On May 15, 9:27?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > > >> I'm cleaning up some old code, and want to see what orphan
> > > >> functions might be sitting around.
>
> > > >> Is there a static call tree analyzer for python?
>
> > > > How about
> > > >http://pycallgraph.slowchop.com/
>
> > > > ...
> > > > Jay Graves
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > Have you checked to see if PyChecker or pylint can help you?
> > > Apparently they can find unused variables at least, I don't know
> > > whether they do functions or not.
>
> > I think of dynamic programming and dynamic code, but voice. ?Does that
> > mean sing about it?- Hide quoted text -
>
> > - Show quoted text -
>
> I have to write a song. ?Somebody?- Hide quoted text -
>
> - Show quoted text -

Sorry for the frequent posts: I think I have to write a noise about
train cars crossing rail, putting numbers on frequencies, and send
code.  Train whistles are pretty good too.  I believe those are the
ones that start to go on keystrokes.  I'd try to compare differences
between those and bowling pins.  A couple others are coins clinking
and poker chips.  Generally speaking, tapping metals and glass.


From bbxx789_05ss at yahoo.com  Sun May 11 22:27:29 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 19:27:29 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<48275955.4000106@islandtraining.com> 
	<48275A1F.5080606@bc90021.net>
	<mailman.950.1210549839.12834.python-list@python.org>
Message-ID: <d69d9540-ee12-4ba4-8ced-170057bf7690@m73g2000hsh.googlegroups.com>

On May 11, 5:50?pm, Gary Herron <gher... at islandtraining.com> wrote:
> bc90021 wrote:
> > You are a perfect example of exactly what I was talking about, and why
> > the Python community is such a poor one.
>
> I though you were treated quite fairly all things considered. ? (You
> started the personal attacks, the whining about the group, the
> accusations of arrogance, and the refusal to believe we all *knew* the
> error was in your file name calculation and not in Python threads.)
>
> This group is widely acknowledged as one of the more friendly groups
> around, ?and in fact we keep it that way by coming down rather hard on
> those who abuse either the members of the group or the purpose of the
> group.

That is a blantant lie.   This group has well known members that are
some of the biggest jackasses I've ever encountered on the internet.
I've never heard a peep out of anyone criticizing their behavior.  If
I were their employer, and I read some of the stuff they posted, I
would fire them on the spot.


From jzgoda at o2.usun.pl  Fri May 16 10:24:15 2008
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 16 May 2008 16:24:15 +0200
Subject: Variable by label
In-Reply-To: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <g0k5h1$92$1@atlantis.news.neostrada.pl>

rocco.rossi at gmail.com pisze:
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
> 
> foo = some_function("foo")
> 
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.

getattr(object, attrname, default)

-- 
Jarek Zgoda
Skype: jzgoda | GTalk: zgoda at jabber.aster.pl | voice: +48228430101

"We read Knuth so you don't have to." (Tim Peters)


From kyosohma at gmail.com  Fri May  9 10:07:15 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:07:15 -0700 (PDT)
Subject: help needed!
References: <mailman.866.1210341290.12834.python-list@python.org>
Message-ID: <0829ee61-3322-44fd-9404-582d86e70347@r66g2000hsg.googlegroups.com>

On May 9, 8:54?am, drjekil <drjeki... at gmail.com> wrote:
> i have a script which will do a specific task for a file in a folder,now i
> would like to do the same task ?for the all files in that folder(25
> files).how can i do that?
>
> Thanks in advance.
>
> --
> View this message in context:http://www.nabble.com/help-needed%21-tp17148388p17148388.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

Or use the glob module and a loop...

Mike


From workitharder at gmail.com  Thu May 22 19:45:52 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 16:45:52 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com> 
	<4834C05D.6020608@gmail.com>
	<0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>
	<69kkd1F33ahahU1@mid.uni-berlin.de>
Message-ID: <62ba83ad-ee44-4d5a-bac9-346478effa69@a70g2000hsh.googlegroups.com>

On May 22, 12:07 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 21 May 2008 17:56:38 -0700, bukzor wrote:
> > On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
>
> >> if os.path.exists('file'):
> >>         open('file', 'w').close()
>
> >> Right?
>
> > You only want to blank it if it exists? If it doesn't exist you won't
> > create it.
> > The .close() is superlative: since you don't keep the value, it gets
> > deallocated and closed by the destructor.
>
> The language neither guarantees *when* an object will be deallocated nor
> that its destructor is called *at all*.  It's cleaner to explicitly close
> the file.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Good to know.


From aahz at pythoncraft.com  Sat May 24 23:30:16 2008
From: aahz at pythoncraft.com (Aahz)
Date: 24 May 2008 20:30:16 -0700
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <g1amg8$7ce$1@panix3.panix.com>

In article <52ba2118-d095-48a6-8844-2ee4c2ec2be1 at m36g2000hse.googlegroups.com>,
Sh4wn  <luckyluke56 at gmail.com> wrote:
>
>first, python is one of my fav languages, and i'll definitely keep
>developing with it. But, there's 1 one thing what I -really- miss:
>data hiding. I know member vars are private when you prefix them with
>2 underscores, but I hate prefixing my vars, I'd rather add a keyword
>before it.
>
>Python advertises himself as a full OOP language, but why does it miss
>one of the basic principles of OOP? Will it ever be added to python?

Not directly addressing your point except insofar as it appears that
your understanding of OOP may be limited:

"...some experts might say a C++ program is not object-oriented without
inheritance and virtual functions.  As one of the early Smalltalk
implementors myself, I can say they are full of themselves." --zconcept
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From banibrata.dutta at gmail.com  Sun May 11 00:15:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sun, 11 May 2008 09:45:26 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>

Thanks Gabriel & Terry. Those explanations make perfect sense.

What is the recommended way, to find the "compatible" packages that include
.dll's / .pyd's or dependencies that are Python release specific ? For
example, is there a 'yum' or other automatic dependency checking mechanism
which works accross OS's (Windows & Linux), which will allow me to find the
other (s.a. 3rd party) packages, which would work with say Python2.2 ? Is it
a completely manual exercise, where I read the README or Package Notes or
Release Notes, and figure out the required version of package ?


On 5/11/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <
> banibrata.dutta at gmail.com> escribi?:
>
> > given that I already have Python2.5 installed & will install Python2.4,
> will
> > copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
> > i think the answer is "no", but still asking. is it package specific ?
> >
> > does it matter if the packages were egg drops ?
>
> Packages containing only .py modules ("pure" packages) are OK; packages
> using C extensions (.dll, .pyd) have to be rebuilt (or you have to download
> the binaries for the other Python version).
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From mail at timgolden.me.uk  Thu May 29 04:18:19 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:18:19 +0100
Subject: How to get all the variables in a python shell
In-Reply-To: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <483E66CB.1010003@timgolden.me.uk>

lixinyi.23 at gmail.com wrote:
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
> 
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
> 
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

I stronly suggest you look at IPython [1]. To do what I think
you're describing, you'd need to hack or reimplement the interpreter.
And that's what they've done. ISTR that they even have a branch
which is dealing with parallel instances.

TJG

[1] http://ipython.scipy.org/moin/


From deets at nospam.web.de  Wed May 21 05:12:09 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 11:12:09 +0200
Subject: scalable xml
References: <mailman.1415.1211360945.12834.python-list@python.org>
Message-ID: <69i7c8F32ha2iU1@mid.uni-berlin.de>

hyperboreean wrote:

> Hi, I am writing the application server for a three-tier architecture
> and sending the client's response in xml. My question is: is there a way
> to build the xml dom in a more scalable way and faster way than just
> creating every textNode and element for it? I have tons of data to
> transmit and it drives me crazy having to build that dom manually.
> 
> I am not sure if this is a stupid question as I don't know other
> alternatives ... maybe just provide a template xml which I can fill with
> data but that can introduce some pretty ugly bugs in the application.

You should have a look at the ElementTree-package (which also comes
api-compatible as lxml). These allow for a much more pythonic way of
creating XML-trees.

However you might consider using a much more concise format such as json for
transport (if you have control over the client). It reduces the data-amount
to about a tenth or so (of course depending on your xml-dialect), with
considerable gains in processing time. 

And then there in fact are some template languages such as KID and genshi
that might suit you because they enforce proper XML.

Diez


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:31:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:31:29 +0200
Subject: datamining .txt-files, library?
In-Reply-To: <96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
Message-ID: <482c4934$0$6041$426a74cc@news.free.fr>

Chris a ?crit :
> On May 15, 2:27 pm, globalrev <skanem... at yahoo.se> wrote:
>> i have a big collection of .txt files that i want to open and parse to
>> extract information.
>>
>> is there a library for this or maybe even built in?
> 
> os.open to open the files

What's wrong with (builtin) open ?



From pataphor at gmail.com  Tue May 20 07:31:58 2008
From: pataphor at gmail.com (pataphor)
Date: Tue, 20 May 2008 13:31:58 +0200
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <20080520133158.3cdab604@hyperspace>

On Sun, 18 May 2008 06:36:28 -0700 (PDT)
Monica Leko <monica.leko at gmail.com> wrote:

> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

Here's something to get you started. No guarantees, but I managed to
write four 10 bit numbers to a file producing 5 bytes, saying hello. I
was just looking for an excuse to use send.

P.

def gen(f):
    L = []
 
    def flush(L):
        L.reverse()
        s = ''.join(map(str,L))
        j = int(s,2)
        f.write(chr(j))
    
    while 1:
        x = yield 
        if x in [0,1]:
            L.append(x)
        else:
            break
        if len(L) == 8:
            flush(L)
            L = []        
    if L:
        while len(L) < 8:
            L.append(0)
        flush(L)
    yield

def tenbits(i):
    for j in range(9,-1,-1):
        yield i >> j & 1

def charbits(s):
    for c in s:
        i = ord(c)
        for j in range(8):
            yield i >> j &1

def byten(L):
    while L:
        yield L[:10]
        L = L[10:]
        
def test():
    f = file('out.dat','w')
    g = gen(f)
    g.send(None)
    for x in [90,611,397,758]:
        for bit in tenbits(x):
            g.send(bit)
    g.send('stop')
    f.close()

def test1():
    bits = list(charbits('hello'))
    L = []
    for x in byten(bits):
        L.append(int(''.join(map(str,x)),2))
    print L
    
if __name__=='__main__':
    test()


From mimi.vx at gmail.com  Sun May 11 07:02:00 2008
From: mimi.vx at gmail.com (mimi.vx)
Date: Sun, 11 May 2008 04:02:00 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
	<7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>
Message-ID: <3fdd2ec3-cfba-41a9-90d4-c75ff4fb5b82@m3g2000hsc.googlegroups.com>

On May 11, 12:05 pm, alefajnie <devp... at gmail.com> wrote:
> > try arr[2][3] instead.
>
> > basically your version is trying to index an array with a tuple argument (2,3).
>
> > --irmen
>
> oh, you're right.
>
> btw, is any simple way to create multi-dimension array ?
> any built-in function ?

test numpy from scipy package :)
on www.scipy.org


From lists at cheimes.de  Thu May  8 20:08:33 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 02:08:33 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <200805081914.06459.kyrie@uh.cu>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
Message-ID: <48239601.1070200@cheimes.de>

Luis Zarrabeitia schrieb:
>>>> 0**0
> 1
> 
> That 0^0 should be a nan or exception, I guess, but not 1.

No, that's correct for floats. Read the wikipedia article or the C99
standard for more information.

Christian



From bruno.desthuilliers at gmail.com  Wed May  7 17:51:17 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 14:51:17 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com>

On 7 mai, 18:39, umpsu... at gmail.com wrote:
> Hello,
>
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..
>
> def valsort(x):
>         res = []
>         for key, value in x.items():
>                 res.append((value, key))
>         return res
>
> def mostfreq(strng):
>         dic = {}
>         for letter in strng:
>                 if letter not in dic:
>                         dic.setdefault(letter, 1)

You don't need dict.setdefault here - you could more simply use:
                           dic[letter] = 0
>                 else:
>                         dic[letter] += 1
>         newd = dic.items()
>         getvals = valsort(newd)

There's an error here, see below...

>         getvals.sort()
>         length = len(getvals)
>         return getvals[length - 3 : length]

This is a very convoluted way to get the last (most used) 3 pairs. The
shortest way is:
  return getvals[-3:]


Now... Did you actually test your code ?-)

mostfreq("abbcccddddeeeeeffffff")

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/tmp/python-1048583f.py", line 15, in mostfreq
  File "/usr/tmp/python-1048583f.py", line 3, in valsort
AttributeError: 'list' object has no attribute 'items'

Hint : you're passing valsort a list of pairs when it expects a
dict...

I don't see the point of the valsort function that  - besides it
doesn't sort anything (I can only second Arnaud about naming) -  seems
like an arbitrary extraction of a piece of code for no obvious reason,
and could be expressed in a simple single line:
  getvals = [(v, k) for k, v in dic.items()]

While we're at it, returning only the 3 most frequent items seems a
bit arbitrary too - you could either return the whole thing, or at
least let the user decide how many items he wants.

And finally, I'd personnally hope such a function to return a list of
(letter, frequency) and not a list of (frequency, letter).

Here's a (Python 2.5.x only) possible implementation:

from collections import defaultdict

def get_letters_frequency(source):
    letters_count = defaultdict(int)
    for letter in source:
        letters_count[letter] += 1
    sorted_count = sorted(
       ((freq, letter) for letter, freq in letters_count.iteritems()),
        reverse=True
        )
    return [(letter, freq) for freq, letter in sorted_count]

get_letters_frequency("abbcccddddeeeeeffffff")
=> [('f', 6), ('e', 5), ('d', 4), ('c', 3), ('b', 2), ('a', 1)]

# and if you only want the top 3:
get_letters_frequency("abbcccddddeeeeeffffff")[0:3]
=> [('f', 6), ('e', 5), ('d', 4)]

HTH


From tjreedy at udel.edu  Sun May 11 21:36:39 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 21:36:39 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
Message-ID: <g086v5$eml$1@ger.gmane.org>


"Tim Roberts" <timr at probo.com> wrote in message 
news:hkse24lhna7fp26tcfv5literfaded6nov at 4ax.com...
| wxPythoner at gmail.com wrote:
| >
| >I am stunned that this simple misunderstanding of mine ended in a
| >mathematical clash of a sort. :)  You guys really blew me away wih
| >your mathematical knowledge. And also the 0**0 is a thing I've never
| >thought about trying, until now that is. If the mathematical rule is
| >that EVERYTHING raised to the power of 0 is 1, then we should accept
| >that, even in the case of 0**0. This is just the way it is.
|
| Sure, but it's ALSO the mathematical rule that 0 raised to any power is 
0.

That may be some people's (partial) rule but not everyone's.
There is only agreement on 0 to a positive power.

| Thus, there are multiple solutions to this problem, meaning that there is
| NO solution to the problem.

Only for some people.
a**b := reduce(mul, [a]*b, 1) for all counts a and b is a simple, uniform, 
and useful rule.
Do you have in mind any situations in which it is advantageous to have 0**0 
undefined?

tjr





From mattheww at chiark.greenend.org.uk  Sat May 24 14:22:32 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 24 May 2008 19:22:32 +0100 (BST)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<C3q*E9Bds@news.chiark.greenend.org.uk>
	<2auf34dc59ajcjfq7f3fl0366eukfd98d5@4ax.com>
Message-ID: <Gbv*6CHds@news.chiark.greenend.org.uk>

David C. Ullrich <dullrich at sprynet.com> wrote:

> Matthew Woodcraft <mattheww at chiark.greenend.org.uk> wrote:
>> For example, if you were writing the 'logic' for a chess program you
>> might choose a way of modelling the board that can't represent a
>> position with more than one black king. And then when you got round
>> to doing the GUI you might find out that your users would like to be
>> able to have this temporarily when setting up a position.

> What you say may be true, but this doesn't seem to me like a good
> example. Not that I see _why_ the player would want to have two kings
> temporarily, but if so I wouldn't have the view report this state to
> the model, I'd have the view wait until the player had decided on the
> final configuration betore saying anything to the model. The model
> should only deal with legal positions.


Then you end up implementing a second model of the board state in the UI
layer. And if it turns out that you want to support things like 'save
current position' and 'clone current position to a new window' during
setup, you might well find yourself putting so much logic in the UI
layer that some of what you already wrote in the 'logic' layer ends up
unused.

As for why you might want illegal positions during setup, imagine a UI
where you can click on a square repeatedly and it cycles through the
possible pieces (dunno whether this would be good in practice, but I do
know that guessing whether a UI is good without trying it is rather
unreliable).

-M-


From gherron at islandtraining.com  Wed May 28 01:54:59 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 22:54:59 -0700
Subject: multi dimensional dictionary
In-Reply-To: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
Message-ID: <483CF3B3.3080805@islandtraining.com>

Alok Kumar wrote:
> Dear All,
>
> I am using dictionary for filling my xpath parsed data.
>
> I wanted to use in the following manner.
>
> mydict[index] ["key1"] ["key2"]    #Can someone help me with right 
> declaration.
>
> So that I can fill my XML xpath parsed data
>  
> mydict[0] ["person"] ["setTime"] = "12:09:30"
> mydict[0] ["person"] ["clrTime"] = "22:09:30"


That kind of thing can be done, but there's a better way perhaps:

Create keys for a single level dictionary which are tuples composed of 
the sequence of keys you would have used in your multidimensional 
dictionary.

mydict[(0,"person","setTime")] = "12:09:30"
mydict[(0,"person","clrTime")] = "22:09:30"

Would that work for you?

Gary Herron


>
> Can someone help me with right declaration usages. Your help will be 
> highly appreciated.
>
> Regards
> Alok
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From bvidinli at gmail.com  Fri May  2 03:07:55 2008
From: bvidinli at gmail.com (bvidinli)
Date: Fri, 2 May 2008 10:07:55 +0300
Subject: where do I begin with web programming in python?
In-Reply-To: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <36e8a7020805020007n554f1dadm49571aade9fd1bc4@mail.gmail.com>

i also asked same question in this list last week.
i found http://www.cherrypy.org/ to be most suitable for me.
it is basic, easy, pure...
it contains its own webserver, very easy to start.

others have many framworks, structures, classes many many..
i wanted a pure web programming system , i found cherrypy.

see you.


2008/5/2 jmDesktop <needin4mation at gmail.com>:
> I have been to the main python site, but am still confused.  I have
>  been using .net, so it may be obvious how to do this to everyone
>  else.  I am aware there are various frameworks (Django, Pylons, etc.),
>  but I would like to know how to create web pages without these.  If I
>  have mod_python or fastcgi on apache, where do I start?  I don't have
>  clue where to begin to create a web page from scratch in python.  I am
>  sure I will want to access database, etc., all the "normal" stuff, I
>  just want to do it myself as opposed to the frameworks, for learning.
>
>  Thank you for any help.
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
?.Bahattin Vidinli
Elk-Elektronik M?h.
-------------------
iletisim bilgileri (Tercih sirasina gore):
skype: bvidinli (sesli gorusme icin, www.skype.com)
msn: bvidinli at iyibirisi.com
yahoo: bvidinli

+90.532.7990607
+90.505.5667711

From gagsl-py2 at yahoo.com.ar  Fri May  2 23:15:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 03 May 2008 00:15:47 -0300
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
	<6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>
	<743d317e-bd06-42b1-a4fa-399ec18b548b@z24g2000prf.googlegroups.com>
Message-ID: <op.uaj50ldrx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:44:09 -0300, terry <itskrithika at gmail.com> escribi?:
> On May 2, 10:26?am, terry <itskrith... at gmail.com> wrote:
>> On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
>>
>> > Much of the time the exercise of writing a small demo program
>> > will lead you to the answer. ?If not, then post it, along with
>> > the output from the program that shows the problem.
>>
>> Here is the code.
>>
>> """Open serial connection"""
>> ? ? ? ? def openSerialConnection(self,serpt):
>> ? ? ? ? ? ? try:
>> ? ? ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>>
>> ? ? ? ? ? ? except:
>> ? ? ? ? ? ? ? ? self.print_u("Failed to open serial port %s. " %serpt)
>>
>> ? ? ? ? def enterThroughSerialPort(self,serpt):
>> ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>> ? ? ? ? ? ? ?self.print_u('Sending !!!!..')
>> ? ? ? ? ? ? ?while True:
>> ? ? ? ? ? ? ? ? s1.write('*')
>> ? ? ? ? ? ? ? ?c = s1.read(1)
>> ? ? ? ? ? ? ? ?if c:
>> ? ? ? ? ? ? ? ? ? self.print_u('Found "*" ')
>> ? ? ? ? ? ? ? ? ? ? break
>> ? ? ? ? ? ? print c
>> ? ? ? ? ? ? ?s1.write('enter\r')
>> ? ? ? ? ? ? ?s1.read('login')
>>
>> if __name__ == '__main__':
>> ? ? serpt = '/dev/ttyS0'
>> ? ? x.openSerialConnection(serpt)
>> ? ? # funtion to reboot the device goes here ---#
>> ? ? x.enterThroughSerialPort(serpt)
>>
>> After opening the serial connection, the device is rebooted followed
>> by sending '*' to serial port and reading back the same. I seem to
>> have problem while trying to read '*' back from serial port. First of
>> all I am not sure if serial port received the '*'.
>
> This is the err message I received:
>
> c = s1.read(1)
> File "/usr/local/lib/python2.5/site-packages/serial/serialposix.py",
> line 275, in read
>     ready,_,_ = select.select([self.fd],[],[], self._timeout)

If you want some help, you have to help us to diagnose the problem.
The above lines are just a small excerpt of the complete error report that  
surely you got; usually it includes the exception *type*, the exception  
*value*, and the whole *stack trace*. Now we have to *guess* what happened  
in that select call.
Also, when posting code, try to post the *actual* code you run - copy and  
paste it. Do not retype it again. The code you posted has indentation  
errors, uninitialized variables...
Try to make a *small*, runnable example that reproduces the problem;  
remove anything that isn't esential to the issue being discussed. Write  
down what is your expected behaviour, and what actually happens. If the  
program halts due to an error, copy the *whole* report including the  
exception type, message, and the complete traceback.

In this particular case, due to the serial device, it's improbable that  
someone will be able to execute your program, but anyway try to write the  
example code. Sometimes you may find the problem yourself just by trying  
to write the example.

A few notes on the code:

- don't create many Serial objects; create only a single instance and use  
it everywhere it is needed. (That is, instead of using '/dev/ttyS0' as an  
argument, pass the Serial object already created, or save it as an  
instance attribute: self.serial = Serial(...) )

- ensure you're using the right protocol parameters (baud rate, bits,  
parity...) for the device. That's why it helps to create the Serial object  
in a single place.

-- 
Gabriel Genellina



From wuwei23 at gmail.com  Wed May 21 22:09:08 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:09:08 -0700 (PDT)
Subject: Psyche (scheme in python), how to run on vista?
References: <01afbef9-6225-487d-9468-cbdf9b03c64b@b1g2000hsg.googlegroups.com>
Message-ID: <8c0885f8-380a-4c73-a7f4-30326c9d9563@y18g2000pre.googlegroups.com>

On May 22, 5:19 am, notnorweg... at yahoo.se wrote:
> anyone using psyche?
>
> how do you run it on Vista? what file do you click? there is no
> obvious file like psyche.py...

After installation, you should be able to find 'psyche.bat' in C:
\Python2.X\Scripts.

However, it hard codes the path for the python interpreter, so you'll
need to edit it to fix.

BUT! Doing so just reveals the next problem, running it I keep getting
complaints about the following piece of code:

  def get_epsilon(self, None = None):
    """
    Return the mapping for epsilon, or None.
    """
    return self.special.get('', None)

I've never used psyche and I've no idea what the author was thinking
here, but the 'None = None' in the function parameters is a serious
'wtf?' You need to edit site-packages\psyche\Plex\Transitions.py line
85 to be:

  def get_epsilon(self):

Then running psyche.bat will at least get the interpreter running. I
can make no guarantees on its correctness, however. But at least it
_seems_ to work:

    C:\Python25\Scripts>psyche
    Psyche version 0.4.3, Copyright (C) 2002 Y. Duppen

    Psyche comes with ABSOLUTELY NO WARRANTY.  This is free software,
and
    you are welcome to redistribute it under certain conditions; read
the
    attached COPYING for details.

    psyche> (define (plus1 x) (+ x 1))

    psyche> (plus1 2)
    3

Hope this helps!

- alex23


From jeremy+complangpython at jeremysanders.net  Wed May 21 11:13:17 2008
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Wed, 21 May 2008 16:13:17 +0100
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
	<slrng38egv.2j3.hat@se-162.se.wtb.tue.nl>
Message-ID: <g11e6d$9ka$1@gemini.csx.cam.ac.uk>

A.T.Hofkamp wrote:

> Escape the space to prevent the shell from interpreting it as a word
> seperator. This of course also holds for all other shell meta characters,
> such as * [ ] \ > < & and a few others I probably have forgotten.

If the command was useful (unlike cd), it might be better to use subprocess
to launch it so that you don't need the escaping:

subprocess.call(['ls', '8000 dir'])

This avoids using the shell.

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From notnorwegian at yahoo.se  Sun May 25 21:14:51 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:14:51 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
	<JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>
	<5cae3f71-c699-4faa-97f3-d4c33e2daf9b@d77g2000hsb.googlegroups.com>
Message-ID: <208739fb-46ab-4fc1-86c7-1b7b03d3cbe8@a70g2000hsh.googlegroups.com>

On 26 Maj, 03:04, notnorweg... at yahoo.se wrote:
> On 26 Maj, 01:30, I V <ivle... at gmail.com> wrote:
>
>
>
> > On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> > > i meant like set[pos], not iterate but access a specific position in the
> > > set.
>
> > If you need to access arbitrary elements, use a list instead of a set
> > (but you'll get slower inserts). OTOH, if you just need to be able to get
> > the next item from the set, you can use an iterator:
>
> > > now i have to do:
> > > s = toSet.pop()
> > > toSet.add(s)
>
> > i = iter(toSet)
>
> > s = i.next()
>
> > > if i want to get the url of the next item in a set, how would i do that?
> > > i can do this with a list:
>
> > > def scrapeSitesX(startAddress, toList, listPos): return
> > > scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> > > list.
> > > i can work around that but it doesnt get as elegant.
>
> > Do you have to use recursion here? Why not:
>
> > for site in toList:
> >         scrape(site)
>
> i have tried both.
>
> anyway how do i concatenate sets? which i have to if use to funcions
> like you suggest.
>
> and also when iterating a set is there any other way to avoid
> exceptions than have a counter and compare to len(set).
> is there no method that cna check if iter != None

nevermind got it how to concatenate.

but no builtin method for concatenating right?


From ian.g.kelly at gmail.com  Wed May  7 14:31:43 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 7 May 2008 12:31:43 -0600
Subject: letter frequency counter / your thoughts..
In-Reply-To: <4821e745$0$24414$5fc3050@news.tiscali.nl>
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
Message-ID: <3fc761710805071131w45fd124cs5638db218585e35f@mail.gmail.com>

On Wed, May 7, 2008 at 11:30 AM, Paul Melis <paul at floorball-flamingos.nl> wrote:
>     dic = {}
>     for letter in strng:
>         if letter not in dic:
>             dic[letter] = 0
>         dic[letter] += 1

As a further refinement, you could use the defaultdict class from the
collections module:

   dic = defaultdict(int)
       for letter in strng:
           dic[letter] += 1


From artyprog at gmail.com  Tue May 20 17:43:16 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Tue, 20 May 2008 23:43:16 +0200
Subject: Processing in Python
Message-ID: <483345f5$0$902$ba4acef3@news.orange.fr>

Hello,

The Processing Graphics language has been implemented in Javascript.
Does anybody tried to make this in Python ?

Regards

Salvatore

http://processing.org/ 




From george.sakkis at gmail.com  Fri May  9 22:00:25 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 19:00:25 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>

On May 8, 7:50?pm, Barry Warsaw <ba... at python.org> wrote:

> On behalf of the Python development team and the Python community, I ?
> am happy to announce the third alpha release of Python 2.6, and the ?
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not ?
> suitable for production environments. ?We continue to strive for a ?
> high degree of quality, but there are still some known problems and ?
> the feature sets have not been finalized. ?These alphas are being ?
> released to solicit feedback and hopefully discover bugs, as well as ?
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you. ?If you find things broken or incorrect, please submit a bug ?
> report at
>
> ? ?http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
> ? ?http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
> ? ?http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions. ?If all goes ?
> well, next month will see the first beta releases of both, which will ?
> also signal feature freeze. ?Two beta releases are planned, with the ?
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
> ? ? ?http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry

I'm trying to install on the latest Ubuntu (8.04) and the following
extension modules fail:

_bsddb, _curses, _curse_panel, _hashlib, _sqlite3, _ssl, _tkinter,
bz2, dbm, gdbm, readline, zlib

All of them except for _tkinter are included in the preinstalled
Python 2.5.2, so I guess the dependencies must be somewhere there.
Does Ubuntu have any non-standard lib dir ?

George


From castironpi at gmail.com  Fri May 16 09:51:46 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:51:46 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
Message-ID: <c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>

On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
> ?? wrote:
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> The implementation of slots depends on that behaviour:
>
> http://docs.python.org/ref/slots.html
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> Can you expand on that?
>
> Peter

Spirals are important.


From maxm at mxm.dk  Sun May  4 16:13:02 2008
From: maxm at mxm.dk (Max M)
Date: Sun, 04 May 2008 22:13:02 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same    time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <481E18CE.90508@mxm.dk>

Gilly skrev:
> Hi
> I am trying to create an application that uses some form of input to
> create a midi file.
> I would like for this to be a 'real time' process. In other words, I
> want to be able to begin playing the midi file before I finish writing
> it, and continue writing as it plays.


Perhaps csound can help with this. It has a lot of midi, realtime and 
python stuff.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 06:01:31 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 12:01:31 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>
	<ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>
Message-ID: <4833f2ef$0$3737$426a74cc@news.free.fr>

sturlamolden a ?crit :
> On May 19, 10:42 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
> 
>> Well... They do - they are called 'C compilers' !-) As Roel Schroven
>> mentioned - and he is at least partially right on this point - C has
>> been designed to make optimizing C compiler not to hairy to write.
> 
> C has proven very difficult to optimize, particularly because pointer
> aliasing prevents efficient register allocation.

Does this compare to optimizing something like Python ? (serious 
question, but I think I already know part of the answer).


From chris.hulan at gmail.com  Wed May 28 10:34:18 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Wed, 28 May 2008 07:34:18 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
	<3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>
Message-ID: <e1774ff4-32df-413d-9400-c5697f945d82@56g2000hsm.googlegroups.com>

On May 28, 4:59 am, s0s... at gmail.com wrote:
> On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
...
> Thanks. So if OSError().errno == errno.ENOENT, then it means the path
> doesn't exist? (What does "ENOENT" stan for?)

I always read it as Error NO ENTry


From spoier at gmail.com  Tue May 20 12:26:11 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 09:26:11 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
Message-ID: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>

How do I access the sysctl(3) call from Python on BSD?

Specifically I want to retrieve:

$ sysctl -d net.inet.ip.stats
net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)

So I'll need some way of getting to struct ipstat from Python as well

Thanks,
Skye



From nick at craig-wood.com  Thu May 15 04:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 15 May 2008 03:30:03 -0500
Subject: sys.excepthack...
References: <dullrich-866845.15471814052008@text.giganews.com>
Message-ID: <slrng2nran.osj.nick@irishsea.home.craig-wood.com>

David C. Ullrich <dullrich at sprynet.com> wrote:
>  Becoming a fan of wxPython, but I can't stand
>  what it does with error messsages 
[snip]
>  So I want to pop up a modal dialog on error.
[snip]
>  Came up with a ridiculous hack involving both sys.stderr
>  and sys.excepthook. Works exactly the way I want.
>  Seems ridiculous - what's the right way to do this?
> 
>  Ridiculous_hack.py:
> 
>  import sys
>  import wx
> 
>  def hook(*args):
>    try:
>      sys.__excepthook__(*args)
>    finally:
>      printer.Show()
> 
>  class ErrorDisplay:
>    def __init__(self):
>      self.buffer = ''
>    def write(self, text):
>      self.buffer = self.buffer + text
> 
>    def Show(self): 
>        wx.MessageDialog(None, str(self.buffer), 
>                        'Error:',wx.OK).ShowModal()
>        self.buffer = ''
> 
>  printer = ErrorDisplay()
>  sys.stderr = printer
>  sys.excepthook = hook

Here is how I've done it in the past.  It is a complete runnable
example :-

------------------------------------------------------------
#!/usr/bin/python

import wx
import sys
from traceback import format_exception

class TestApp(wx.Frame):
    """Test error handling"""

    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, -1, title, size=(200,200))
        sys.excepthook = self.OnException
        button = wx.Button(self, wx.NewId(), "Produce Error")
        self.Bind(wx.EVT_BUTTON, self.OnClick)
        self.Show(True)

    def OnException(self, type, value, traceback):
        """
        Called on OnException
        """
        error_text = "".join(format_exception(type, value, traceback))
        wx.MessageDialog(None, error_text, 'Custom Error:', wx.OK).ShowModal()

    def OnClick(self, evt):
        "Click with a deliberate mistake"
        adsfsfsdf

if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = TestApp(None, -1, "Test")
    app.MainLoop()
------------------------------------------------------------

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From vadim.pestovnikov at gmail.com  Fri May  9 00:42:33 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 8 May 2008 21:42:33 -0700 (PDT)
Subject: Which way is faster for a simple web reporting system: django, web.py 
	or cgi
Message-ID: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>

Hi all,

May be this is a dump question, but it makes me crazy in my research.
I am not a developer but I have experience with web development (PHP)
in a past. Most my activities are around database administration and
design. For most database administration tasks I am using Python. Very
often I need to come up very quickly with web interface or web
application to a database, more then less complicated. The standard
set is:

* speed of the development (I think a framework is the way, but which
one?)
* user authorization (my preferences are sessions)
* form validation for input data
* file uploading
* export data to different format like csv, pdf, xml

For example I need to create a simple reporting system. Using
different filters like HTML drop down lists, radio buttons, check
boxes and etc., I need to generate different output to my team and
managers.

I realize that today is very popular and useful, using a framework.
Which Python framework or solution will be more faster to start (i.e.
for start, usually I have maximum two weeks, if a project looks like a
stable I can get three, four weeks), flexible (i.e. using SQL queries
together with views) and easier in integration: django, web.py, CGI or
something else?

Thanks in advance.


From michele.simionato at gmail.com  Thu May 29 13:34:42 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 29 May 2008 10:34:42 -0700 (PDT)
Subject: undocumented functions in pkgutil
Message-ID: <04d9dbd9-ad9c-4756-afa5-163800a785eb@t54g2000hsg.googlegroups.com>

I see that the pkgutil module has many useful functions which are
however undocumented.
Does anybody know why it is so? In particolar, can I safely use
pkg.walk_packages
without risking a change of interface in the future? I looks unlikely,
since pkgutil is
used in setuptools, but I want to be sure before relying on it.

    Michele Simionato


From wgumgfy at gmail.com  Fri May  9 02:43:03 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 23:43:03 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>
Message-ID: <68ia3oF2t5308U1@mid.individual.net>

Lew wrote:
> Waylen Gumbal wrote:
>> Not everyone follows language-neutral groups (such as
>> comp,programming as you pointed out), so you actually reach more
>> people by cross posting. This is what I don't understand - everyone
>> seems to assume that by cross posting, one intends on start a
>> "flamefest", when in fact most such "flamefests" are started by
>> those who cannot bring themselves to skipping over the topic that
>> they so dislike.
>
> It's not an assumption in Xah Lee's case.  He spams newsgroups
> irregularly with rehashed essays from years ago, and a number of
> people are just tired of him.

I did not know this. One should obviously not do that.

> Don't blame the victims for the perpetrator's actions, OK?

I'm not blaming any "victims", but I don't see anyone saying "read this 
or else", so why not just skip the thread or toss the OP in your 
killfile so you don't see his postings. If others want to discuss his 
topics, who are you or I to tell them not to?

-- 
wg 




From samslists at gmail.com  Sat May  3 14:12:45 2008
From: samslists at gmail.com (samslists at gmail.com)
Date: Sat, 3 May 2008 11:12:45 -0700 (PDT)
Subject: Problems replacing \ with \\
References: <0ca30eb2-3791-4910-9e78-f32e3b2a72cb@2g2000hsn.googlegroups.com> 
	<mailman.13.1208830370.6645.python-list@python.org>
Message-ID: <19fcd6b9-75b7-480d-bf0b-572c52e213c5@f24g2000prh.googlegroups.com>

Sorry for the late response.  I've been travelling internationally and
am just getting back to work.

So--thank you to everyone who responded!

To answer everyone's question---- I am dumping all of the data from a
mysql database, then creating a postgresql database, then inserting
the data into the new postgresql database.

This seems to be a reasonable way to do it, because all I have to do
is double my 's and my \s (I hope).

Thanks


On Apr 21, 7:12?pm, Michael Torrie <torr... at gmail.com> wrote:
> samsli... at gmail.com wrote:
> > Hi...
>
> > Here's a weird problem...I'm trying to escape a bunch of data to put
> > into a database.
>
> Is it possible to use the database API and prepared statements to avoid
> having to go through this exercise? ?Also, most database APIs work
> natively in unicode, so creating your prepared statement and then
> passing in each parameter as an argument saves a lot of hassle, since
> the API's usually decode the unicode strings automatically.



From davidj411 at gmail.com  Fri May 23 15:04:43 2008
From: davidj411 at gmail.com (davidj411)
Date: Fri, 23 May 2008 12:04:43 -0700 (PDT)
Subject: function returns , but variable values has not changed in the 
	interactive prompt
Message-ID: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>

if you run execfile function to run a python script and that script
has variables and functions, should't those variable change in the
interactive prompt too?

script snippet that calls the function which should return like this
	return (stuffedname,bigstring, numbertimes,num_times_search_string)

this is the variable that calls the functions. when a function returns
something AND there is a variable set as shown immediately below,
does't the variable get updated?

tu_count = CountStrings (name, balance, searchstr)

this is the output from the script.
notice how tu_count actually differs when called from interactive
prompt after script exits.

tu_count: ('peterjackson', 'peterjacksonpeterjacksonpeter', 2, 0)
<type 'tuple'>

>>> tu_count
('davidjacksondavidjacksondavid', 2, 0)

thanks


From jkugler at bigfoot.com  Mon May 12 13:12:21 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Mon, 12 May 2008 09:12:21 -0800
Subject: Saving an audio file's waveform into an image
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <g09tpl$9qa$1@ger.gmane.org>

Julien wrote:

> Hi,
> 
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?

Take a look at http://code.enthought.com/projects/chaco/  One of their
examples does exactly this. Last example on this page:
http://code.enthought.com/projects/chaco/gallery.php

Hope that helps.

j




From paddy3118 at googlemail.com  Tue May 20 17:29:49 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 14:29:49 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <7c50dabd-7644-4166-9ac7-87d8c9b10384@a32g2000prf.googlegroups.com>

On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 8:13 am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > I posted this code last night in response to another thread, and after I
> > posted it I got to wondering if I had misused the list comprehension. Here's
> > the two examples:
>
> > Example 1:
> > --------------------
> > def compress(s):
> >     new = []
>
> >     for c in s:
> >         if c not in new:
> >             new.append(c)
> >     return ''.join(new)
> > ----------------------
>
> > Example 2:
> > ------------------------
> > def compress(s):
> >     new = []
> >     [new.append(c) for c in s if c not in new]
> >     return ''.join(new)
> > --------------------------
>
> > In example 1, the intention to make an in-place change is explicit, and it's
> > being used as everyone expects it to be used. In example 2, however, I began
> > to think this might be an abuse of list comprehensions, because I'm not
> > assigning the result to anything (nor am I even using the result in any
> > way).
>
> > What does everyone think about this? Should list comprehensions be used this
> > way, or should they only be used to actually create a new list that will
> > then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?

... Because it obscures the intent of the code.

- Paddy.


From bronger at physik.rwth-aachen.de  Tue May 13 13:28:10 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 13 May 2008 19:28:10 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
Message-ID: <87d4nqgllh.fsf@physik.rwth-aachen.de>

Hall?chen!

Dave Parker writes:

>>  Notice that I said "free software", not "*** FREE *** software
>> !!!!  1!" (that is, free as in freedom, not free as in
>> beer). Read again my answer, considering this.
>
> I misread your meaning.

... twice.  Flaming Thunder itself is not free software, is it?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From scott at rscorp.ab.ca  Thu May  1 10:59:33 2008
From: scott at rscorp.ab.ca (Scott Sandeman-Allen)
Date: Thu,  1 May 2008 08:59:33 -0600
Subject: Photo gallery software
In-Reply-To: <0001HW.C43F80E40094984AB01AD9AF@news.individual.de>
Message-ID: <r02010500-1049-35F8E598178F11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Jumping Arne (arnlen at mac.com) wrote:

>I've searching for some software that would allow me to present my photos on 
>the web (I'm not interested a software that generates static pages that I 
>upload) and there are quite a few, see for example 
><http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
>haven't managed to find one that I like - Gallery 2 is close.
>
>So I've started to see if there is one that is based python (PHP isn't really 
>"my language") but when I search on Google almost the only thing I find are 
>photo galleries of snakes (to be honest I didn't know that people were *that* 
>interested in pythons).
>
>Do any anyone know if there exists photo gallery software written in Python?
>
>I've found
><http://www.amk.ca/python/code/gallery>
><http://www.developer.com/lang/other/article.php/3734416>

I've been working with Photologue for a while with some nice results.
    <http://code.google.com/p/django-photologue/>

It is a Django project 
    <http://www.djangoproject.com/>,

It includes support for tagging:
    <http://code.google.com/p/django-tagging/> 

It easily allows configuration of different image sizes and integrates with generic templates providing gallery and detail view support. 

HTH

Scott


From jcd at unc.edu  Wed May  7 15:49:14 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Wed, 07 May 2008 15:49:14 -0400
Subject: [Fwd: Re: Am I missing something with Python not having interfaces?]
Message-ID: <1210189754.4595.4.camel@aalcdl07.lib.unc.edu>


-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill
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From ivan.illarionov at gmail.com  Tue May 20 04:50:18 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:50:18 +0000 (UTC)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <g0u3c9$1fec$3@news.mtu.ru>

On Mon, 19 May 2008 11:07:06 -0700, Vicent Giner wrote:
[...]
> 
> By the way, is it possible (and easy) to call a C function from a Python
> program??

Yes.

http://groups.google.com/group/comp.lang.python/msg/9d47913a265c348a

-- Ivan


From kamhung.soh at gmail.com  Tue May 13 01:08:04 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 15:08:04 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
	<Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
	<SQ7Wj.264445$pM4.99013@pd7urf1no>
Message-ID: <op.ua2tvsvaev04yd@melwxp23>

On Tue, 13 May 2008 13:23:30 +1000, Yves Dorfsman <yves at zioup.com> wrote:

> Scott David Daniels wrote:
>> Yves Dorfsman wrote:
>>> ... Sorry this was a typo (again :-), I meant:
>>> d = time.local()
>>>   y = d[0]
>>>   d = d[2]
>> Then:
>>     y, d = list(time.localtime())[:4:2]
>>
>
> What is this ?
> Could you point me to a document on this syntax ?
>
> I've tried it, it works, but I don't understand how.
>
>
> Thanks.
>
> Yves.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

See:

"Built-in Functions", "slice()",  
http://docs.python.org/lib/built-in-funcs.html

l = range(10)
l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
l[:4]   # first four elements
[0, 1, 2, 3]
l[::2]  # every second element
[0, 2, 4, 6, 8]
l[:4:2] # every second element in the first four elements
[0, 2]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kd015b3257 at blueyonder.co.uk  Sat May 10 07:21:16 2008
From: kd015b3257 at blueyonder.co.uk (kdwyer)
Date: Sat, 10 May 2008 12:21:16 +0100
Subject: PyXml
References: <mailman.890.1210367123.12834.python-list@python.org>
	<mailman.892.1210376249.12834.python-list@python.org>
	<4825361E.8000102@behnel.de>
Message-ID: <g041cs$d1d$1@ger.gmane.org>

Stefan Behnel wrote:

> Martin v. L?wis wrote:
>>> Can anyone recommend a Python validating parser that validates vs Xml
>>> Schema?
>> 
>> The libxml bindings for Python can do that.
> 
> ... although the OP will likely prefer using lxml, where it's three lines
> of Python (ok, plus an import), compared to quite a bit of code in the
> official libxml2 bindings.
> 
> http://codespeak.net/lxml
> 
> Stefan
> --
> http://mail.python.org/mailman/listinfo/python-list

Stefan, Martin,

Thanks for your replies.

Kev



From prasanths89 at gmail.com  Sun May 25 12:13:57 2008
From: prasanths89 at gmail.com (Prasanth)
Date: Sun, 25 May 2008 09:13:57 -0700 (PDT)
Subject: Pinging a machine from python
Message-ID: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>

I tried pinging a machine from python using socket programming but
could not do it. Is there any module which we can use to ping the
machine < like net::ping in perl> or can you give me simple program.


From notnorwegian at yahoo.se  Sat May 24 19:20:19 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 16:20:19 -0700 (PDT)
Subject: webspider getting stuck
Message-ID: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>

i am writing a simple webspider .

how do i avoid getting stuck at something like this:
Enter username for W3CACL at www.w3.org:

?

i can obv add an if-clause for the specific site but since i guess
there will be more of the same thats ov not a viable approach in the
long run.


From zondo42 at googlemail.com  Sun May  4 20:00:27 2008
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: Mon, 05 May 2008 01:00:27 +0100
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <m31w4hk4bo.fsf@googlemail.com>

notbob <notbob at nothome.com> writes:
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.

You're very likely to receive help here.  Or at the very least, people will
point you at the best place to get it.  Fire away!

Glenn


From theller at python.net  Wed May 21 02:29:46 2008
From: theller at python.net (Thomas Heller)
Date: Wed, 21 May 2008 08:29:46 +0200
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
	<d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
Message-ID: <69htqnF32242iU1@mid.individual.net>

Skye schrieb:
> Great, thanks for the help (I'm fairly new to Python, didn't know
> about ctypes)
> 
>     from ctypes import *
>     libc = CDLL("libc.so.7")
>     size = c_uint(0)
>     libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
>     buf = c_char_p(" " * size.value)
>     libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

IIUC, sysctlbyname writes the information you requested into the buffer supplied
as second argument.  If this is true, then the above code is incorrect.
c_char_p(src) creates an object that shares the buffer with the Python string 'src';
but Python strings are immutable and you must not write ctypes code that modifies them.

Instead, you should code:

     from ctypes import *
     libc = CDLL("libc.so.7")
     size = c_uint(0)
     libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
     buf = create_string_buffer(size.value)
     libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

Thomas


From thudfoo at opensuse.us  Sat May 10 13:47:42 2008
From: thudfoo at opensuse.us (member thudfoo)
Date: Sat, 10 May 2008 10:47:42 -0700
Subject: list object
In-Reply-To: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
Message-ID: <3d881a310805101047s1cc9c803wb87805e8044b514c@mail.gmail.com>

On 5/10/08, Gandalf <goldnery at gmail.com> wrote:
> my manual contain chapter about lists with python. when i try to copy
>  paste :
>
>  li = ["a", "b", "mpilgrim", "z", "example"] (1)
>
>
>  it i get this errore:
>
>  "TypeError: 'list' object is not callable"
>
>  i was wondering if their is  any special module I should import before
>  i use this function
>
>  i know i ask foolish questions it's my first day with python and i
>  have experience only with PHP and javascript, so please be patient
>
>  thanks
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>

Remove the "(1)"


From duncan.booth at invalid.invalid  Sun May 25 05:25:25 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 May 2008 09:25:25 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
Message-ID: <Xns9AA96A134C3B6duncanbooth@127.0.0.1>

bearophileHUGS at lycos.com wrote:

> Ben Finney:
>>In Python, the philosophy "we're all consenting adults here" applies.<
> 
> Michael Foord:
>> They will use whatever they find, whether it is the best way to
>> achieve a goal or not. Once they start using it they will expect us to
>> maintain it - and us telling them it wasn't intended to be used by
>> them in the first place won't cut it.
> 
> So they will use the methods with one or two underscores too. And
> imply that you want to document them too.
> They don't seem adult enough, then ;-)
> Internal API hiding seems quite less useful if you don't need to let
> customers manage your code.
> 
Or if you code in C++ and they *really* need to get at something you made 
private they will still get at it. I've been there and done that: 'private' 
in languages which have it is rarely an advantage and frequently a pain.

Also note that private in C++ while it does make it harder to access 
(though not preventing it altogether) doesn't do any data hiding, so if you 
are subclassing a vendor-provided function you still have to take note of 
the private attributes to avoid naming collisions.

At least Python's convention which hides the implementation without making 
it hard to access has some benefits.


From _karlo_ at _mosor.net_  Thu May 22 04:19:40 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Thu, 22 May 2008 08:19:40 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
	<a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>
	<Xns9AA6596091F47duncanbooth@127.0.0.1>
Message-ID: <Xns9AA6690FE6B5Dmosornet@161.53.160.65>

Duncan Booth <duncan.booth at invalid.invalid> wrote in 
news:Xns9AA6596091F47duncanbooth at 127.0.0.1:

> Catching only the specific exceptions you think you can handle would 
> be  more Pythonic: that way things like sys.exit() will still work 
> inside some_function.

I know, this was just a somewhat poorly example ;).

> I prefer a 'for' loop rather than 'while' so I can limit the number of 
> retries.
> 
> The following may or may not be 'more pythonic', but is something I've 
> used. It's a factory to generate decorators which will retry the 
> decorated function. You have to specify the maximum number of retries, 
> the exceptions which indicate that it is retryable, and an optional 
> filter function which can try to do fixups or just specify some 
> additional conditions to be tested.

Interesting approach, I think I'll use something like that for avoding 
infinite loops. Thanks a lot...



-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From ian.g.kelly at gmail.com  Tue May 27 23:46:58 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 21:46:58 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
	<op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <3fc761710805272046k1d6d01b0x53afd81971761cda@mail.gmail.com>

On Tue, May 27, 2008 at 8:08 PM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 27 May 2008 14:43:52 -0300, Ian Kelly <ian.g.kelly at gmail.com>
> escribi?:
>
>> It sounds like the wasteful list creation is the biggest objection to
>> using a list comprehension.  I'm curious what people think of this
>> alternative, which avoids populating the list by using a generator
>> expression instead (apart from the fact that this is still quadratic,
>> which I'm aware of).
>>
>> def compress(s):
>>   new = []
>>   filter(None, (new.append(c) for c in s if c not in new))
>>   return ''.join(new)
>
> filter returns a newly created list, so this code is as wasteful as a list
> comprehension (and harder to read).

Here it returns a newly created *empty* list, which is not nearly as
wasteful as one that's linear in the size of the input.  I'll grant
you the second point, though.  I very much doubt that I would ever
actually use this myself.  I was just curious what others would think
of it.


From grante at visi.com  Fri May  2 10:46:43 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:46:43 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
Message-ID: <mu2dnYvNde3OtIbVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> wrote:
> -On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>>To my mind, the Python interpreter installed by a package as
>>distributed with the OS *is* OS territory and belongs in /usr/bin/.
>
> That's the difference with a distribution, such as Linux, and full OSes ,
> such as BSDs or commercial Unix variants. They prefer to keep a pristine
> state for the OS vendor files

Python _is_ an OS vendor file in the Linux world.

> versus what the user can opt to install himself,

Traditionally, Python has not been optional.

> hence the /usr/bin - /usr/local/bin separation. Same for sbin,
> lib, and so on. It effectively guarantees you can nuke
> /usr/local without ill consequences for your OS.

That's the point. You _couldn't_ nuke Python and have your
system keep running.  That's why it was in /usr/bin.

-- 
Grant



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:38:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:38:58 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <48363c34$0$15204$607ed4bc@cv.net>
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <4836747b$0$15488$426a74cc@news.free.fr>

John Salerno a ?crit :
> I know that it is good programming practice to keep GUI and logic code 
> physically separate, by using XRC for example, but I'm wondering if it's 
> also good practice (and even possible) to keep them separate from an 
> implementation standpoint as well. Basically what I mean is, should it 
> be possible to write, for example, the logic for a strategy game without 
> even knowing what the graphics will look like or how they will work?

Depends on your definition of "logic". The point is not "keep GUI and 
logic code" separate, but to keep "domain" logic (as) separated (as 
possible) from user-interface stuff.

> To be more specific, let's say I want to create a simple, 2D strategy 
> game. It will have a board layout like chess or checkers and the player 
> will move around the board. Let's say this is all I know, and perhaps I 
> don't even know *this* for sure either. Is it possible to write the 
> logic for such a game at this point?

Yes : build a model of the board and pieces and functions/methods to 
allow (code-level) interaction with it. Then your user interface will 
just have to create a visual representation of this model (let's call it 
a view) and present the user with ways (connected to things we'll call 
'controllers') to call the interaction functions/methods.

Then : the view registers itself with the model, display itself, and 
wait for user interactions. These user interactions are sent to the 
appropriate controller, which will call on the model's interaction 
functions/methods. Then the model updates itself and notify the view 
that it's state has changed, so the view can refresh itself.

Ever heard of the "Model/View/Controller" pattern ?

> Let's say I want to write a "move" function (or perhaps it would be a 
> method of a "Character" class) for moving the player around. Could you 
> really write this function without 1) knowing what the interface will 
> look like, and 2) integrating GUI code with the logic?

Yes. The move function will modify the state of the board/pieces 
("character", whatever) model, which will then notify whoever is 
interested that it's state has changed.

> Another example could be printing messages to the player. If I need to 
> say "You killed the monster!", is there a general way to write this, or 
> do I need to specifically refer to GUI widgets and methods, etc. in 
> order for it to be displayed properly?

Idem. State change, notification.

> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

s/GUI/ui/g

The user interface doesn't need to be graphical. There were games and 
emails clients and text editors before GUIs existed, you know ?



From arnodel at googlemail.com  Fri May  2 15:26:55 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 02 May 2008 20:26:55 +0100
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
	<9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>
Message-ID: <m2wsmca4n4.fsf@googlemail.com>

Mensanator <mensanator at aol.com> writes:

> On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
>> Mensanator wrote:
>> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>> >> Shawn Milochik wrote:
>> >>> How does one "plonk" stuff from Google Groups? Specifically, how
>> >>> can this be done in Gmail?
>> >> Set up a filter that looks for some phrase in the mail headers that
>> >> identifies messages originating from google groups. ?Gmail's filters are
>> >> fairly flexible. ?I'd probably just have it look for certain words.
>> >> Look at an e-mail's source (raw view) and particularly check in the
>> >> headers for things to filter by.
>>
>> > Why don't you just block all messages from Gmail?
>>
>> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
>> (implying it's use for his own posting and viewing the list) that would
>> work splendidly for him! ?Or not.
>>
>> Of course you're not likely to see this message either since I and many
>> folks on here post from gmail.
>>
>> Spam comes mainly from Google Groups, not as much from Gmail in my
>> experience.
>
> I didn't say it was POSTED from gmail, but the spammers often have
> gmail addresses, to wit:

You're confusing gmail addresses and Google Groups
(groups.google.com), which can be used as a web interface to usenet
and mailing lists.  Look at the 'Organisation' header of the messages
you quote.

It seems most of the spam on comp.lang.python is posted from Google
Groups, *including* the one with a 'From' header which is not a gmail
address.

So it would be more efficient to block messages posted from Google
Groups than the ones from gmail addresses.

-- 
Arnaud


From hugo_hurtig at hotmail.com  Sat May 10 20:40:27 2008
From: hugo_hurtig at hotmail.com (hugo_hurtig at hotmail.com)
Date: 11 May 2008 00:40:27 GMT
Subject: generic chemical ampicillin chloramphenicol allergy antibiotic
	generic drug information generic tablets 1
Message-ID: <4826407b$0$6434$834e42db@reader.greatnowhere.com>

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From tjreedy at udel.edu  Sun May 11 21:20:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 21:20:58 -0400
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
	<845f3e49-14ef-43dd-8cc9-806f1f50690c@59g2000hsb.googlegroups.com>
Message-ID: <g0861o$cnq$1@ger.gmane.org>


"Sven Siegmund" <sven.siegmund at gmail.com> wrote in message 
news:845f3e49-14ef-43dd-8cc9-806f1f50690c at 59g2000hsb.googlegroups.com...
|> I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
| > can:
|
| Oh I see the posts in this newsgroup do not yet support Unicode.

I think this depends on the reader and maybe the fonts on the system.
OutlookExpress displays hatted c, for instance, fine.

 Most
| of the special characters in my source code have been messed up. But
| anyway, those who know Czech can handle it. The error is replicable
| even with the messed-up characters.





From lists at cheimes.de  Fri May  2 06:07:11 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 12:07:11 +0200
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C   
	libraries on Windows
In-Reply-To: <86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>	<_X8Sj.3499$XI1.3261@edtnps91>
	<cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>	<mailman.437.1209681507.12834.python-list@python.org>
	<86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>
Message-ID: <481AE7CF.20901@cheimes.de>

illume schrieb:
> There are still *lots* of people who still use win95, 98, 98se, me,
> and win2k - as shown by the statistics I linked to in a previous
> post.  If you want more statistics about the number of people using
> what OS they are fairly easy to find with a search engine.  One day
> win9x will be finally dead, but that's not yet(and the w3c stats show
> it's usage actually increasing in march!).

Windows 2000 is still supported by Python 2.6 and 3.0 although you may
get into trouble if you haven't installed at least SP4.

Christian


From technopax at gmail.com  Tue May 13 15:53:42 2008
From: technopax at gmail.com (Technopax)
Date: Tue, 13 May 2008 12:53:42 -0700 (PDT)
Subject: Socializing site EXCLUSIVELY for TECHIES
Message-ID: <6abacda4-76b0-4e73-82b8-4da58c42815e@d19g2000prm.googlegroups.com>

Technopax.com, (http://www.technopax.com) the first socializing web
portal exclusively catering to the IT Professionals world over is
launched.

This web portal will be a common online platform for IT industry
related professionals. Technopax.com primarily targets computer
software and hardware professionals, networking & system
administrators, nano Technologists, bio-technologists, graphics &
animation designers, BPO/Call Center/ITES employees, telecom experts,
employees of IT Departments of all business organizations and
technology students etc as its members.

According to the promoters, an online platform exclusively for Techies
will improve their technical and professional skills through the
sharing of knowledge base, methodologies and skill sets.  Apart from
building vast friends circle, this will also help them to be abreast
with the latest developments that happen in the tech front world over.

Technopax.com has many features for the members to collaborate and
socialize.  It has text/audio and video chat, online clubs, events,
forums, classified advertisements, discussion rooms, music and video
sharing, web profiles etc. Please verify.


From http  Thu May  8 20:01:42 2008
From: http (Paul Rubin)
Date: 08 May 2008 17:01:42 -0700
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
Message-ID: <7xve1oxs49.fsf@ruckus.brouhaha.com>

dave <squareswallower at 1ya2hoo3.net> writes:
>                         if newtlist not in mapdic:
>                                     mapdic[newtlist] = [line]
>                         if line not in mapdic[newtlist]:
>                                     mapdic[newtlist].append(line)

I'd use the defaultdict module to avoid the above.

>             for value in mapdic.values():
>                         if len(value) <= 1:
>                                     pass
>                         else:
>                                     print value

I'd write:

           for value in mapdic.values():
                  if len(value) > 1:
                        print value

I'd actually use itervalues rather than values, but that's a little
bit fancy, you don't have to worry about it til later.


From notnorwegian at yahoo.se  Fri May 23 23:30:10 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 20:30:10 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
Message-ID: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>

when running a very computationalheavy program in the shell it
sometimes freezes but the commandprompt runs it without problems and
muh faster, why?


also, the command prompt starts at C:\Users\user>

i want to start at C:\python25\progs

how do i change that?


From lixinyi.23 at gmail.com  Fri May 30 20:02:06 2008
From: lixinyi.23 at gmail.com (Lee)
Date: Sat, 31 May 2008 09:02:06 +0900
Subject: How to get all the variables in a python shell
In-Reply-To: <cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>
Message-ID: <001001c8c2b1$919e74e0$1740a8c0@xxip78t6pqlqgp>

Hi, thank your for your reply. I will try iPython.

I did try sage for a while, but I found it quite heavy, and I'm not sure
whether it's easy to expand like python or not. New libraries can be
easily imported in python, and those libraries could be build in almost
any popular computer 
language. Can sage do that? 

The reason why I want to work on this is the same with you. I'm an
automotive engineer. What I need is a powerful 
yet light-weight computation software, which can help me in analyzing
datas on the engine test bench. Matlab is powerful, but it contains so
much stuff that I actually don't need but have to buy, and you know that

it's quite expansive. 

So my idea is to build a GUI with python first, and then intergrate as
many exsiting computation libraries as possible. There also has to be a
plotting app, which is quite important and need to think about. I did
try Gnuplot-python combination and matplotlib,  but found both terrible
inferior to Matlab plotting functionality.  Do you know any plotting
programs written in 
python?


-----Original Message-----
From: python-list-bounces+lixinyi.23=gmail.com at python.org
[mailto:python-list-bounces+lixinyi.23=gmail.com at python.org] On Behalf
Of caca at mailinator.com
Sent: Friday, May 30, 2008 9:55 PM
To: python-list at python.org
Subject: Re: How to get all the variables in a python shell


  Your project interests me. Actually I was thinking about doing the
same. I hadn't worked on it at all, but I though about it and had the
idea about reading the session namespace directly, which I though would
be stored in the __dict__ attribute of something.

  After reading your post, I have been trying a little bit, and I have
found a way to do it with ipython. If you open an ipython console, press
_ then hit TAB, you'll see it stores some useful information, including
all input, all output, and after some searching, a dictionary matching
all variables to its values.

__IPYTHON__.user_ns

  There is a little extra stuff in there that you don't want, but that
can be easily filtered (the extra stuff is either 'In', 'Out', 'help' or
starts with '_'). I've tried it, and you can change the value in that
dict to alter the value of the real variable. Say you have a variable
'test':

test=5
__IPYTHON__.user_ns['test']=4
print test #prints 5

  If I get it right, python is a dynamic language, and you won't break
things by messing around with its inner stuff like this, but you better
check it.

  Is this what you had in mind?
--
http://mail.python.org/mailman/listinfo/python-list



From jkrukoff at ltgc.com  Thu May 15 19:32:44 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:32:44 -0600
Subject: no inputstream?
In-Reply-To: <1210893082.3312.2.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>
Message-ID: <1210894364.3312.10.camel@jmk>


On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > >
> > > > you're right, my java implementation does indeed parse for Id3v2
> > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > i buffer and parse.  apologies if i misrepresented my code!
> > >
> > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > work:
> > >
> > > > from mutagen.mp3 import MP3
> > > > id3tags = MP3(urllib2.urlopen(URL))
> > >
> > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > string or buffer, instance found".  does this mean i need to convert
> > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > directory" errors, with a few HTTP 404s.
> > >
> > > [snip]
> > > I think it's expecting the path of the MP3 but you're giving it the
> > > contents.
> > 
> > cool, so how do i give it the path, if not in the form of a URL
> > string?  maybe this is obvious...
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> 
> It doesn't look like you can, with mutagen. So, time to find a different
> library that supports arbitrary file objects instead of only file paths.
> I'd suggest starting here:
> http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> 
> Possibly one with actual documentation, since that would also be a step
> up from mutagen.
> 

After a bit of time looking around, looks like nearly all the python id3
modules expect to work with filenames, instead of file objects.

I can't vouch for it, and the documentation still looks sparse, but this
module at least looks capable of accepting a file object:
http://pypi.python.org/pypi/tagpy

Looks like it'd be a challenge to build if you're on windows, since it
depends on an external library.

Alternately, you could probably create a subclass of the mutagen stuff
that used an existing file object instead of opening a new one. No idea
what that might break, but seems like it would be worth a try.

As last ditch option, could write the first few kb of the file out to a
temp file and see if mutagen will load the partial file.

-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From smitty1e at gmail.com  Sat May  3 16:50:16 2008
From: smitty1e at gmail.com (smitty1e)
Date: Sat, 3 May 2008 13:50:16 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
	<87ve1wxdyk.fsf@benfinney.id.au>
Message-ID: <d4dfe9c6-b725-4c6b-9533-519ea5bc0005@f36g2000hsa.googlegroups.com>

On May 2, 11:29 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> smitty1e <smitt... at gmail.com> writes:
> > Just a fun exercise to unify some of the major input methods for a
> > script into a single dictionary.
> > Here is the output, given a gr.conf file in the same directory with
> > the contents stated below:
>
> > smitty at localhost ~/proj/mddl4/test $ ./inputs.py
> > {'source_db': '/home/sweet/home.db'}
> > smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
> > {'source_db': 'test_env'}
> > smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
> > {'source_db': 'test_cli'}
>
> A good start. However, you need to account for two conventions with
> configuration of programs via environment variables:

[snip]
> This is probably best done by a mapping specifically for the
> environment variable names:
>
>     config_env_names = {
>         'source_db': 'GR_SOURCE_DB',
>         }
>
> and then referencing that dictionary when inspecting the environment:
>
>     for key in config.keys():
>         # ...
>         environ_name = config_env_names[key]
>         environ_value = os.environ.get(environ_name)
>         if environ_value is not None:
>             config[key] = environ_value
>         #...

Hmmm...
I kinda think your excellent points are more in the realm of policy
than mechanism.
What I was going for was to assert that there a designated section (of
many possible ones)
in a .conf file that represents the set of possible program inputs,
and then
offering an example of letting environment and command line arguments
override that
.conf section.
Your points for reducing collision are well taken.  Possibly having a
removable prefix
(which could be a "magic" .conf entry) would allow for a de-conflictor
prefix like
MY_PROGRAM_REALLY_ROCKSsource_db without having to propagate such an
eyesore throughout
the program code.
In any case, it stands as a fun little worked example.
R,
C


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:47:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:47:06 -0300
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
Message-ID: <op.ua29kscgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:06:09 -0300, gsal <salgerman at gmail.com> escribi?:

> There does not seem to be a valid url for the Installer, anywhere.
> Could anyone provide me with a copy of it?

I think py2exe is its successor: http://www.py2exe.org/

-- 
Gabriel Genellina



From jurgenex at hotmail.com  Fri May  9 01:45:21 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Fri, 09 May 2008 05:45:21 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <9vo724prqd0etqlraapsv8e3j6bcigh5ea@4ax.com>

"Waylen Gumbal" <wgumgfy at gmail.com> wrote:
>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 

You seem so have failed to grasp the concept of why Usenet is divided
into separate groups in the first place.

>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.

By your argument there is no need for individual groups in the first
place. We could just as well use a single "HereGoesEverything" and just
skip over those topics that we so dislike.

jue


From pecora at anvil.nrl.navy.mil  Sat May  3 11:24:13 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 03 May 2008 11:24:13 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
	<A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>
Message-ID: <pecora-D066F9.11241203052008@ra.nrl.navy.mil>

In article <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d at visi>,
 Grant Edwards <grante at visi.com> wrote:

> On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> > On Sat, 03 May 2008 00:44:00 +1000
> > Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> >> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> >> > As someone else pointed out, not all the world is Linux.
> >> 
> >> It's a good thing I've never implied such to be the case.
> >
> > You haven't *said* it but you have definitely *implied* it.
> > Installing Python in /usr/bin is not common.
> 
> It is common.  That's where it's installed by almost all Linux
> distributions.

MacOS X system python (or links to them) is in the same place.

-- 
-- Lou Pecora


From larry.bates at websafe.com`  Thu May 22 18:51:39 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 17:51:39 -0500
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>

cm_gui wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
> 
> I've yet to see a web application written in Python which is really
> fast.

You are just dead wrong about this.  Bad programmers will write slow software in 
any language.  There are some HUGE sites using Zope.  I think much of Google's 
software is written in Python.  I have programs that have surprised me with 
their speed.  If your Python program is slow, you have almost assuredly 
approached it with a wrong method or algorithm.  www.websafe.com is completely 
written in Python and we support thousands of users uploading data 
simultaneously at wire speed (and that includes AES-256 encryption on our end).

-Larry


From ivan.illarionov at gmail.com  Mon May 26 18:00:18 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:00:18 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
Message-ID: <g1fbti$2cld$1@news.mtu.ru>

On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:

> Thanks!
> Anyone know which library should i learn then?

Looks like you need to dive into Win32 API
http://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspx
http://msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
and others
combined with ctypes.

Ivan


From jstucklex at attglobal.net  Tue May 27 21:47:55 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 21:47:55 -0400
Subject: php vs python
In-Reply-To: <g1icn8$r5$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru> <g1icn8$r5$1@news.mtu.ru>
Message-ID: <-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

Not for a good programmer.  Only for half-assed ones.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From davidj411 at gmail.com  Thu May 15 16:25:33 2008
From: davidj411 at gmail.com (davidj411)
Date: Thu, 15 May 2008 13:25:33 -0700 (PDT)
Subject: FTP upload issue
Message-ID: <44eede8c-05b5-441d-9207-210074e55f8f@f36g2000hsa.googlegroups.com>

I am having difficulty uploading a text file using Python 2.5 on MAC
OSX.

SCRIPT

filename='/tmp/mac.info2.txt'
fh=open(filename,'w')
fh.write('yes, i have a mac but don't hold that against me - just
example data')
fh.close()


from ftplib import FTP
'host, username, and password are string variables that have already
been defined.
ftp = FTP(host)
ftp.login(username,password)
'so far, logged in, all is well , error is on next line.

ftp.storlines("STOR" + filename, file(filename))
ftp.quit()

What am i doing wrong?  the file DOES exist, the path is correct, and
the file  was closed after being written. file(filename) should open
it again for the upload?

http://www.python.org/doc/lib/ftp-objects.html says that the command
should be an appropriate "STOR" command: "STOR filename". file is an
open file object which is read...


ERROR
  File "mac.inventory.py", line 44, in <module>
    ftp.storlines("STOR " + filename, file(filename))
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 437, in storlines
    conn = self.transfercmd(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 356, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 550 /tmp/mac.info2.txt: The system cannot find the
path specified.




From ivan.illarionov at gmail.com  Sun May 11 22:33:41 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 02:33:41 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <g08aa5$2i0m$1@news.mtu.ru>

On Sun, 11 May 2008 18:52:48 -0700, Carl Banks wrote:

> On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> In such cases, the name 'dummy' is conventionally bound to the items
>> from the iterator, for clarity of purpose::
>>
>>     for dummy in range(10):
>>         # do stuff that makes no reference to 'dummy'
> 
> Is this documented?  I've never heard of this convention.  It's not PEP
> 8, and I've never seen consistent usage of any name.  I'd be interested
> in knowing where you read that this was a convention, or in what
> subcommunities it's a convention in.
> 
> I think dummy is a terrible name to use for this, since in no other
> usage I can think of does the word "dummy" suggest something isn't used.
>  In fact, quite the opposite.  For example, the dummy_threads module is
> most definitely used; the word dummy means that it's stripped down. 
> Based on that, your usage of the symbol dummy above would suggest to me
> that it's a value used in lieu of something else (such as a calculated
> value).
> 
> In mathematics, a dummy argument another name for the independent
> variable of a function (or more accurately, the symbol used to represent
> it), which also doesn't match your usage.
> 
> If a value isn't used, then I think the most clear name for it is
> "unused".
> 
> 
> Carl Banks

I agree with Carl. This group is the only place I've heard about this 
convension and it looks terrible IMO. Even if a value is not used, the 
variable still has a meaning: it is a counter, or an index.

I know about the other convention: "for i in xrange" or "for i in range".
Wikipedia agrees with me:
http://en.wikipedia.org/wiki/For_loop
Examples in wikipedia article use either "i" or "counter".

It is established convention in almost every programming language and its 
origins are in mathematics (matrix indices).

Google search for "for dummy in range" (with quotes) gives 164 results
While "for dummy in range" gives 146 000 results. Almost thousand times 
more.

So, "i" is more conventional and as such is more readable.

-- Ivan


From torriem at gmail.com  Sat May 24 22:09:13 2008
From: torriem at gmail.com (Michael L Torrie)
Date: Sat, 24 May 2008 20:09:13 -0600
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>	<mailman.1532.1211644302.12834.python-list@python.org>	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
Message-ID: <4838CA49.7000705@gmail.com>

David wrote:
> Seriously, 10 hours of testing for code developed in 10 hours? What
> kind of environment do you write code for? This may be practical for
> large companies with hordes of full-time testing & QA staff, but not
> for small companies with just a handful of developers (and where you
> need to borrow somone from their regular job to do non-developer
> testing). In a small company, programmers do the lions share of
> testing. For programmers to spend 2 weeks on a project, and then
> another 2 weeks testing it is not very practical when they have more
> than one project.

Watch your programmers then.  They do have to write and debug the code.
 And they will spend at least as much or more time debugging as writing
the code.  It's a fact.  I have several programmers working for me on
several projects.  What you have been told is fact.  In my experience
it's 3-10x more time debugging as programming.  I've heard that *good*
programmers write, on average, 10 new lines of code per day.  I can also
verify that this is pretty accurate, both in my own programming
experience, and watching programmers working for me.


From castironpi at gmail.com  Thu May  8 19:49:25 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:49:25 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.818.1210289857.12834.python-list@python.org>
Message-ID: <cd1a1f7d-4ff8-4f18-80ef-45e0fd1cf690@m3g2000hsc.googlegroups.com>

On May 8, 6:10?pm, Nicolas Dandrimont <nicolas.dandrim... at gmail.com>
wrote:
> * wxPytho... at gmail.com <wxPytho... at gmail.com> [2008-05-08 15:54:42 -0700]:
>
> > Have a look at this:
>
> > >>> -123**0
> > -1
>
> > The result is not correct, because every number (positive or negative)
> > raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
>
> > The problem is that Python parses -123**0 as -(123**0), not as
> > (-123)**0.
>
> And why is this a problem ? It is the "standard" operator precedence
> that -123^0 is -(123^0), isn't it ?
>
> > I suggest making the Python parser omit the negative sign if a
> > negative number is raised to the power of 0. That way the result will
> > always be a positive 1, which is the mathematically correct result.
>
> That's what it does :
>
> >>> -123**0
> -1
> >>> (-123)**0
>
> 1
>
> > This is a rare case when the parser is fooled, but it must be fixed in
> > order to produce the correct mathematical result.
>
> Again, the mathematical result is correct. -123^0 is -(123^0), not
> (-123)^0.
>
> Regards,
> --
> Nicolas Dandrimont
>
> ?signature.asc
> 1KDownload

Signs include power.

>>> -2**0
-1
>>> (-2)**0
1
>>> -(2**0)
-1

+x, -x Positive, negative
~x Bitwise not
** Exponentiation

from Help;

However:

>>> 2+3**1
5
>>> 2+3**2
11

So, the order of precedence table has not listed the identical order
of operations with the implementation.

I have hit parentheses in rolling too.

In terms of money, processor-based operations may not be equals.
Clock cycles cost fractions of time.  But, I don't see x= -x in realty.


From gagsl-py2 at yahoo.com.ar  Mon May  5 01:04:53 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:04:53 -0300
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
	<15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>
Message-ID: <op.uan0efpvx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 17:01:15 -0300, lev <levlozhkin at gmail.com> escribi?:

>> * Change indentation from 8 spaces to 4
>     I like using tabs because of the text editor I use, the script at
> the end is with 4 though.

Can't you configure it to use 4 spaces per indent - and not use "hard" tabs?

>> * Remove useless "pass" and "return" lines
>     I replaced the return nothing lines with passes, but I like
> keeping them in case the indentation is ever lost - makes it easy to
> go back to original indentation

I can't think of a case when only indentation "is lost" - if you have a crash or something, normally you lose much more than indentation... Simple backups or a SCM system like cvs/svn will help. So I don't see the usefulness of those "pass" statements; I think that after some time using Python you'll consider them just garbage, as everyone else.

>> * Temporarily change broken "chdir" line
>     removed as many instances of chdir as possible (a few useless ones
> to accomodate the functions - changed functions to not chdir as much),
> that line seems to work... I made it in case the script is launched
> with say: 'python somedir\someotherdir\script.py' rather than 'python
> script.py', because I need it to work in it's own and parent
> directory.

You can determine the directory where the script resides using

import os
basedir = os.path.dirname(os.path.abspath(__file__))

This way it doesn't matter how it was launched. But execute the above code as soon as possible (before any chdir)

>     checksums = open(checksums, 'r')
>     for fline in checksums.readlines():

You can directly iterate over the file:

     for fline in checksums:

(readlines() reads the whole file contents in memory; I guess this is not an issue here, but in other cases it may be an important difference)
Although it's perfectly valid, I would not reccomend using the same name for two different things (checksums refers to the file name *and* the file itself)

>     changed_files_keys = changed_files.keys()
>     changed_files_keys.sort()
>     missing_files.sort()
>     print '\n'
>     if len(changed_files) != 0:
>         print 'File(s) changed:'
>         for key in changed_files_keys:

You don't have to copy the keys and sort; use the sorted() builtin:

     for key in sorted(changed_files.iterkeys()):

Also, "if len(changed_files) != 0" is usually written as:

     if changed_files:

The same for missing_files.

>         for x in range(len(missing_files)):
>             print '\t', missing_files[x]

That construct range(len(somelist)) is very rarely used. Either you don't need the index, and write:

for missing_file in missing_files:
     print '\t', missing_file

Or you want the index too, and write:

for i, missing_file in enumerate(missing_files):
     print '%2d: %s' % (i, missing_file)

> def calculate_checksum(file_name):
>     file_to_check = open(file_name, 'rb')
>     chunk = 8196

Any reason to use such number? 8K is 8192; you could use 8*1024 if you don't remember the value. I usually write 1024*1024 when I want exactly 1M.

-- 
Gabriel Genellina



From mnordhoff at mattnordhoff.com  Sun May 11 21:54:44 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Mon, 12 May 2008 01:54:44 +0000
Subject: python without while and other "explosive" statements
In-Reply-To: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
References: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
Message-ID: <4827A364.9040507@mattnordhoff.com>

ivo talvet wrote:
> Hello,
> 
> Is it possible to have a python which not handle the execution of
> "while", "for", and other loop statements ? I would like to allow
> remote execution of python on a public irc channel, so i'm looking for
> techniques which would do so people won't be able to crash my computer
> (while 1: os.fork(1)), or at least won't won't freeze my python in a
> infinite loop, make it unresponsive. Is there a compiling option (or
> better, something i can get with apt-get cos i think compiling myself
> and handle all the metastuff myself is somehow dirty) for have a
> "secure python" (you can guess what i mean by "secure" in my case) or
> must i touch myself the source disable some code lines ? If last
> solution, which modifications in which files should i do ? (sorry for
> my bad english)
> 
> Thanks.
> 
> Ivo

<http://codepad.org/> is a pastebin-like website that lets people upload
code in a dozen different languages, and it runs it. They have info up
about how it's secure at <http://codepad.org/about>.

I'm pretty sure there's another similar website that's specific to
Python, but I can't remember it. Anyway, it was similar, using virtual
machines, a firewall, and killing stuff that ran for longer than 20
seconds, IIRC.

(Thanks for the link to codepad, habnabit.)
-- 


From zapwireDASHgroups at yahoo.com  Fri May 23 15:40:04 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Fri, 23 May 2008 12:40:04 -0700
Subject: Reloading function obtained via 'from xxx import yyy'
Message-ID: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>

How do I get Python to correctly re-load this function definition?

In test.py:

def testFunc():
    print 'My testFunc!'

I execute...

>>> from test import testFunc
>>> testFunc()
My testFunc!

Fine... now I change test.py to:

def testFunc():
    print 'Modified testFunc!'

...and I'd like to reload testFunc.  How do I do so?  'from test import 
testFunc' keeps the old definition around, and 'reload test' of course doesn't 
work becayse I didn't use 'import test' in the first place.

Thanks for the help,
---Joel





From aisaac at american.edu  Thu May  8 10:26:55 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 14:26:55 GMT
Subject: observer pattern question #1 (reference to subject)
Message-ID: <P4EUj.24095$zw.1789@trnddc04>

I have two questions about the "observer pattern" in Python.

This is question #1.  (I'll put the other is a separate post.)



Here is a standard example of the observer pattern in Python:



http://en.wikipedia.org/wiki/Observer_pattern



Contrast with this rather standard discussion:



http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1



The difference I am focusing on is that in the latter,

the observer (investor) maintains a reference to the

subject (stock).  

(Many questions can be raised of course: see the discussion at

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/131499).



Is anything lost by not maintaining this reference (other 

than error checking ...)?  If I feel the observer needs 

access to the subject, what is wrong with just having the 

subject pass itself as part of the notification?



Thank you,

Alan Isaac




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Message-ID: <e40751d7-b8d2-4529-81cb-f848b72bc824@b5g2000pri.googlegroups.com>

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From myshelter at gmail.com  Sun May  4 07:59:53 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 04:59:53 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
Message-ID: <05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>

On May 4, 12:18 pm, s0s... at gmail.com wrote:
> On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > I had previously ran the import line. I prepended it to the example
> > code I'm trying to run every time but it did not help, still nothing
> > happens. With or without var before 'root'. I'm pasting the code in
> > IDLE and using Windows XP as written in the first post.
>
> Tkinter doesn't work if you type the statements in IDLE. I don't
> remember the specifics of it, but essentially it doesn't work because
> IDLE is itself a Tkinter app. You have to type it at the Python
> command line or save it in a file. BTW, if you're on Windows, you
> should definitely check wxPython. I used to work with Tkinter,
> struggling with it all the time only to get a lame result most of the
> time. Then I switched to wxPython, and in the same week I was learning
> it I did a better GUI than I ever did in Tkinter (with months of
> work!). I feel it makes it easier to make your program have a better
> structure and design, and thus lets you focus on the actual task of
> the program, rather than in the GUI itself. Plus, on Windows, you'll
> get the widgets to look more natively, like any good quality
> application there is on Windows.

Ah, but is it cross platform?

(Thanks for letting me know about IDLE.)


From kyosohma at gmail.com  Wed May  7 09:01:24 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 06:01:24 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
Message-ID: <bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>

On May 7, 6:12?am, pistacchio <pistacc... at gmail.com> wrote:
> hi! i'm a php user and a python programmer. i'd love to use python for
> my server side needs but i can't seem to find what i'm looking for. for
> most of my php work i use mysql and tinyButStrong
> (http://www.tinybutstrong.com) which is a very lightweight template
> engine that offers powerful functionalities. you insert TBS tags in web
> pages like:
>
> <div align="center" class="title-page"> [var.x] </div>
>
> and it replaces [var.x] with the value of global variable x. it also
> makes blocks (and nested blocks) easy to implement:
>
> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
> [blk1;block=end] </p>
>
> in the previous code it cycles throu all the values of the array blk1.
>
> it does many more things, like htlm escaping, url and js encoding etc,
> conditional displaying etc, but it is not more confusing that inserting
> pieces of code into the HTML (aka: littering the code and kissing
> goodbye to the code/presentation separation). it comes in the form of a
> single file with a single class that you can easily include in the code
> and go.
>
> now, i've searched the net and it seems full of python-based frameworks
> for doing server side scripting and templating, but none that suits my
> needs.
>
> ? ? 1. i like writing code and i like control. i mean, open up the
> simplest text editor and write in it. i don't want something that is
> command-line driven or that writes code for me like ">>>
> makePagesFromThisDatabase()".
> ? ? 2. i want something very lightweight. i don't want dozen of options,
> pre-made blogging parts ecc. i just need a good non invasive template
> engine and the basic functions for server side scripting, like session
> managing, request parsing, functions to manipulate html code (encodings etc)
> ? ? 3. i don't want to beg my hosting provider to install the libraries.
> a simple include file should do the work.
> ? ? 4. object oriented programming is not required (better: i prefer
> plain old procedural programming).
>
> any help? thanks in advance

Did you look at TurboGears or Django? TG uses Kid in the 1.x series
and Genshi in 2.x (I think) for templating purposes. There's also
Cheetah, one of the more powerful Python templating engines out there.

http://genshi.edgewall.org/
http://www.kid-templating.org/
http://www.cheetahtemplate.org/
http://turbogears.org/

Maybe those links will get you going.

Mike


From ndbecker2 at gmail.com  Wed May 21 12:48:59 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 12:48:59 -0400
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
	<5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>
Message-ID: <g11jpq$gr9$1@ger.gmane.org>

marek.rocki at wp.pl wrote:

> Neal Becker napisa?(a):
>> In an earlier post, I was interested in passing a pointer to a structure
>> to fcntl.ioctl.
>>
>> This works:
>>
>> c = create_string_buffer (...)
>> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
>> err = fcntl.ioctl(eos_fd, request, args)
>>
>> Now to do the same with ctypes, I have one problem.
>>
>> class eos_dl_args_t (Structure):
>>     _fields_ = [("length", c_ulong),
>>                 ("data", c_void_p)]
>> ...
>> args = eos_dl_args_t()
>> args_p = cast(pointer(args), c_void_ptr).value
>> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>>
>> That last may fail, because .value creates a long int, and ioctl needs a
>> string.
>>
>> How can I convert my ctypes structure to a string?  It _cannot_ be a
>> c-style 0-terminate string, because the structure may contain '0' values.
> 
> Hello. I'm not completely sure what your problem is ("may fail" is not
> a good description. Does it fail or does it not?). 

May fail is exactly what I meant.  As written, ioctl will accept a 3rd arg
that is either a string or int.  In this case, it is int.  If the address
fits in an int it works, but if the address (which is a long) doesn't fit
it fails (gives an overflow error).  Seems to be random (as well as
platform dependent).




From afrobeard at gmail.com  Thu May 29 07:24:55 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 29 May 2008 04:24:55 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
	<b0fc1a8b-98c0-4bbf-9afb-cf5741eae1f6@t54g2000hsg.googlegroups.com>
Message-ID: <bc253c34-64ad-49a1-9d47-e3dcc2f1ae26@i76g2000hsf.googlegroups.com>

Another way of doing this might be to use the module difflib to
calculate the differences. It has a sequence matcher under it which
has the function get_matching_blocks

difflib is included with python.


On May 29, 2:02?pm, Chris <cwi... at gmail.com> wrote:
> On May 29, 10:36?am, loial <jldunn2... at googlemail.com> wrote:
>
> > I have a requirement to compare 2 text files and write to a 3rd file
> > only those lines that appear in the 2nd file but not in the 1st file.
>
> > Rather than re-invent the wheel I am wondering if anyone has written
> > anything already?
>
> How large are the files ? You could load up the smallest file into
> memory then while iterating over the other one just do 'if line in
> other_files_lines:' and do your processing from there. ?By your
> description it doesn't sound like you want to iterate over both files
> simultaneously and do a line for line comparison because that would
> mean if someone plonks an extra newline somewhere it wouldn't gel.



From daveparker at flamingthunder.com  Tue May 13 10:05:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 07:05:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com>
Message-ID: <fb6f276c-24f9-4339-b814-5f2c4f331c59@l17g2000pri.googlegroups.com>

On May 13, 7:44?am, castiro... at gmail.com wrote:
> I am not convinced that the colorspace occupies three dimensions necessarily.

Apparently there are some people -- called tetrachromats -- who can
see color in four dimensions.  They have extra sets of cones in their
retinas containing a different photopigment.  So, the dimensions of
color appear to be an artifact of our visual systems, and not inherent
in the colors themselves which are linear (one-dimensional) in
frequency.  http://en.wikipedia.org/wiki/Tetrachromacy


From hdante at gmail.com  Mon May 19 21:13:52 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:13:52 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
Message-ID: <a510fda7-8ae8-4a92-ac5f-62edf8a966d7@z72g2000hsb.googlegroups.com>

On May 19, 5:25?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> There's at least one (possibly incomplete) C interpreter. FWIW, it
> would not be harder (and possibly simpler) to write a byte-code+VM
> based C implementation than it is to write CPython, Jython or

 You may (right now, readily, without experimental software) compile C
to, for example, llvm bytecode, interpret it in the VM, JIT-compile
it, native-compile it, etc. There's also experimental support for
compiling C to the JVM.

 Notice that you usually want to optimize C code, so it will be harder
than writing a python interpreter.

> IronPython. The point is that it's just useless - C is a (very) low-

 It's not useless. Consider that you may distribute your C application
in byte-code instead of native code and during the installation
process, it is native compiled and optimized exactly to your
architecture (like a better "Gentoo", with the compilation split
between you and the user).

> point is that, given Python's (as a language) extrem dynamism,
> compiling it to native code wouldn't buy you much in terms of raw
> performances. The problem is not with writing a native-code
> compiler[1}, but with writing an *optimising* native-code compiler.

 That's the job of pypy folks. And they are getting there. They use a
python subset, called RPython:

 http://morepypy.blogspot.com/2008/01/rpython-can-be-faster-than-c.html
 (note: the test in the site compares garbage collection speed)

 BTW, here's how to compile RPython to (optimized) native code:
 http://codespeak.net/pypy/dist/pypy/doc/standalone-howto.html

 And here is the document that talks about all that:
 http://codespeak.net/pypy/dist/pypy/doc/dynamic-language-translation.html

> I'm not trying to "trivialize" anything. I'm just getting fed up with
> this "Python is an interpreted and therefore slow language" non-
> sense. ?Python is a language, and as such is neither slow nor fast nor

 I'm sorry for creating all those offtopic posts. I feel so ashamed :-
(. Well, not really. :-P

 My suggestion was to use code suitable for optimization (not
considering things that you'd need to worry about the way you write
code, like RPython, or psyco). That's all. :-)


From bignose+hates-spam at benfinney.id.au  Tue May  6 07:06:49 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 06 May 2008 21:06:49 +1000
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
Message-ID: <874p9belo6.fsf@benfinney.id.au>

"Wojciech Walczak" <wojtek.gminick.walczak at gmail.com> writes:

> 2008/5/6, Banibrata Dutta <banibrata.dutta at gmail.com>:
> >  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
> >
> >  So why not put symlink to Python over there on all machines, if
> >  we can put one (or env itself) there ?
> 
> To avoid linking all the rest of interpreters like perl, ruby, lua
> and dozens of others.

The argument was being made from "thousands of scripts". Isn't "dozens
of symlinks" better?

-- 
 \      "It is difficult to get a man to understand something when his |
  `\             salary depends upon his not understanding it." ?Upton |
_o__)                                                   Sinclair, 1935 |
Ben Finney


From fetchinson at googlemail.com  Wed May  7 16:49:09 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 7 May 2008 13:49:09 -0700
Subject: Idea for P3K
In-Reply-To: <4821fea4$0$880$ba4acef3@news.orange.fr>
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <fbe2e2100805071349g784e38eal3db0829c37bc3269@mail.gmail.com>

> > I don't often feel like using this word
>
> Look at languages like OCAML or F #
>

I looked at OCAML and F#. Now what?

Cheers,
Daniel


From nobody at yahoo.com  Thu May 22 19:57:07 2008
From: nobody at yahoo.com (Andrew)
Date: Thu, 22 May 2008 23:57:07 GMT
Subject: Tun/Tap Driver using OpenVPN and DeviceIoControl
Message-ID: <nLnZj.3620$Yp.2489@edtnps92>

Hello I am trying to port some code and I am running into some issues I 
may or may not be able to solve on my own and would appreciate your help

Basically I am trying to open the Tun Driver through openvpn in Ether 
(Tap mode).

code is as follows

f = win32file.CreateFile("C:\\WINDOWS\\System32\\drivers\\tunmp.sys", 
GENERIC_READ, 0, None, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
if WINDOWS:
         ifs = win32file.DeviceIoControl(f, TUNSETIFF, 
struct.pack("16sH", "wj%d", TUNMODE), 0, None)
else:
         ifs = ioctl(f, TUNSETIFF, struct.pack("16sH", "wj%d", TUNMODE))
ifname = ifs[:16].strip("\x00")
print "Interface %s created. Configure it and use it" % ifname

but does not seem to work so well I get "The Paramater is incorrect"

Traceback (most recent call last):
   File "wifi.py", line 167, in <module>
     ifs = win32file.DeviceIoControl(f, TUNSETIFF, struct.pack("16sH", 
"wj%d", TU
NMODE), 0, None)
pywintypes.error: (87, 'DeviceIoControl', 'The parameter is incorrect.')


Would appreciate any help

Ty


From samslists at gmail.com  Wed May 21 02:36:21 2008
From: samslists at gmail.com (samslists at gmail.com)
Date: Tue, 20 May 2008 23:36:21 -0700 (PDT)
Subject: Running programs under a python program...
Message-ID: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>

So I have a python program that runs a bunch of other programs....it
then loops forever, occasionally executing other programs.

To run each of these programs my python code executes:
subprocess.Popen(command_line, shell=True, stdout=fd,
stderr=subprocess.STDOUT)

where command_line is an appropriate command line.  :)

Now my problem is when I abort this program it kills off all the child
processes I've started. In this case I don't want that.   How can I
stop the child processes from dieing when I kill off the parent?

Thanks!


From gaojihuiyuan at yahoo.cn  Thu May 15 14:14:55 2008
From: gaojihuiyuan at yahoo.cn (gaojihuiyuan)
Date: Thu, 15 May 2008 11:14:55 -0700 (PDT)
Subject: Computer
Message-ID: <b9771c23-7119-4f8f-8387-b54f6a7197aa@f24g2000prh.googlegroups.com>

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From marco at sferacarta.com  Tue May  6 05:12:46 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 11:12:46 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>
References: <mailman.625.1210045932.12834.python-list@python.org>
	<e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>
Message-ID: <kiVTj.33119$o06.31178@tornado.fastwebnet.it>

Gasto wrote:

> I still don't see why such a module exists.

There are 2.0 types of programmers: those who always use floating point,
and those who know how to use them.


From sjmachin at lexicon.net  Sat May 10 21:49:28 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 11 May 2008 01:49:28 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <482650a5$1@news.mel.dft.com.au>

globalrev wrote:
> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

Try doing it using %3 and %5 only once each.


From george.sakkis at gmail.com  Fri May 16 12:30:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 16 May 2008 09:30:49 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>

On May 16, 11:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?

Please don't feed the bots.





From nospam at nospam.invalid  Wed May 28 23:19:24 2008
From: nospam at nospam.invalid (Rahul)
Date: Thu, 29 May 2008 03:19:24 +0000 (UTC)
Subject: adding tkinter support on an existing python installation
Message-ID: <Xns9AACE315DDF796650A1FC0D7811DDBC81@85.214.90.236>

'import _tkinter'  fails on my system. I wanted to enable tk support. I do 
have tk and tk-devel installed (but they weren't around when we installed 
python). What's the best way to get these modules into python? I hope I do 
not have to reinstall python itself? Or do I?

-- 
Rahul


From arnodel at googlemail.com  Tue May 20 12:50:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 17:50:31 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<m2tzgt6m4n.fsf@googlemail.com>
	<86e5f3b2-d1ae-414f-976e-062e7a293c9b@25g2000hsx.googlegroups.com>
Message-ID: <m2prrg7wdk.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 20, 10:17?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
[...]
>> <split hairs>
>> Isn't
>>
>> ? ? c not in seen and (seen.add(c) or True)
>>
>> the same as
>>
>> ? ? seen.add(c) or c not in seen
>>
>> ?
>>
>> > ? ? return ''.join(new)
>>
>> (notice I haven't closed the tag!)
>>
>> --
>> Arnaud- Hide quoted text -
>>
>> - Show quoted text -
>
> Unfortunately, no.  "seen.add(c) or c not in seen" will never return
> true, since c gets added to seen before testing if c in seen.
>
> -- Paul

Ha you're right of course.  But I haven't closed the tag yet, so:

    c not in seen and (seen.add(c) or True)

is definitely the same as

    c not in seen and not seen.add(c)

which is

    not (c in seen or seen.add(c))

:)

</split hairs>

-- 
Arnaud


From ganeshborse at gmail.com  Fri May  9 09:34:02 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Fri, 9 May 2008 06:34:02 -0700 (PDT)
Subject: how to pass C++ object to another C++ function via Python 
	function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
	<136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>
	<mailman.484.1209763450.12834.python-list@python.org>
Message-ID: <91e5ada4-09bb-488a-a175-762a83daf658@f24g2000prh.googlegroups.com>

Yes, that worked. I "protected" the variable which I did not want to
get freed. I incremented reference for that variable & it started
working.

Thanks for all your guidance.

On May 3, 5:23?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> Python will do nothing with the pointer inside a PyCObject - unless you ?
> want to, and pass a cleanup function as the second argument to the ?
> PyCObject constructor.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -



From ivan.illarionov at gmail.com  Sun May 25 20:47:00 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 00:47:00 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
Message-ID: <g1d1a4$1rpd$2@news.mtu.ru>

Jerry Stuckle wrote:

> As I've said before - good programmers can write good code in any
> language.

Yes, they can. But it may be harder to do for them in one language and 
easier in another.

Ivan


From sjmachin at lexicon.net  Sat May 24 19:28:55 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 23:28:55 GMT
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in  python coding?
In-Reply-To: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <4838a4b4$1@news.mel.dft.com.au>

zxo102 wrote:
> Hi,
>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?

If by "in python coding" you mean "in Python source code", then just 
type it in with \x in front of each pair of hex digits, like you did above.

However if you mean e.g. how to change a data string x into a data 
string y, something like this is what you want

 >>> import binascii
 >>> x = 'ED 6F 3C 01'
 >>> y = binascii.unhexlify(x.replace(' ', ''))
 >>> y
'\xedo<\x01'

... which is correct ('o' == '\x6f' and '<' == '\x3c'); see below:

 >>> ' '.join(['%02x' % ord(c) for c in y])
'ed 6f 3c 01'
 >>>> len(y)
4

Does (len(y) == 4) surprise you?

> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.

It's rather difficult to guess what you mean here ... insert how many 
'\x'? where?? what gave you the error information??? Consider showing us 
a copy/paste of exactly what you did and what was the response, like I 
did above.


HTH,
John


From castironpi at gmail.com  Wed May  7 20:05:25 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:05:25 -0700 (PDT)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
	<482214BE.4040702@islandtraining.com>
	<mailman.727.1210196161.12834.python-list@python.org>
Message-ID: <543e6dfe-7414-4a4a-8c9c-5b04fe815b02@f36g2000hsa.googlegroups.com>

On May 7, 4:03?pm, Joel Bender <j... at cornell.edu> wrote:
> > Python 3.0 has such a formatting operation, but Python 2.x does not. ?
> > However it's not hard to write.
>
> Indeed. ?Refraining from using named lambdas:
>
> ? ? ?>>> def bin(x):
> ? ? ?... ? ? return ''.join(x & (1 << i) and '1' or '0' for i in
> ? ? ?... ? ? ? ? range(7,-1,-1))
> ? ? ?...
> ? ? ?>>> bin(12)
> ? ? ?'00001100'
> ? ? ?>>> bin(63)
> ? ? ?'00111111'
>
> It would be nice to have str(x, 2) like int(x, 2), but there are bigger
> fish in pond.

+1 str( x, base ) +1


From brad at 16systems.com  Thu May 22 21:15:14 2008
From: brad at 16systems.com (Brad)
Date: Thu, 22 May 2008 21:15:14 -0400
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <g155s7$htk$1@solaris.cc.vt.edu>

George Maggessy wrote:
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? ...

Yes. Python does not impose design patterens onto developers. Pick your 
poison. It is somewhat OOP, but allows for other development paradigms 
as well... rather like C++ IMO although a bit more OOP focused.

Best of luck,

Brad


From badmuthahubbard at gmail.com  Sun May  4 06:04:20 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sun, 4 May 2008 13:04:20 +0300
Subject: Please help - Tkinter not doing anything
In-Reply-To: <3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
Message-ID: <8200bab70805040304y2a33e116l1454f75c80ea956b@mail.gmail.com>

Try adding:

from Tkinter import *

at the beginning, and you don't need "var" in front of root=Tk(), just
"root = Tk()"   (<-without the quotes of course)
What OS are you on?  Are you running "python testapp.py" or similar to
make it run?

-Chuckk

On Sun, May 4, 2008 at 12:39 PM, Protected <protected at myshelter.net> wrote:
> Good thinking. It was indented with spaces, so I replaced them with tabs.
> Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
> code in two parts (with the second one beginning in that line) and run them
> separately, I get no errors, but still nothing happens.
>
> class Application(Frame):
>     def say_hi(self):
>         print "hi there, everyone!"
>
>     def createWidgets(self):
>         self.QUIT = Button(self)
>         self.QUIT["text"] = "QUIT"
>          self.QUIT["fg"]   = "red"
>         self.QUIT["command"] =  self.quit
>
>         self.QUIT.pack({"side": "left"})
>
>         self.hi_there = Button(self)
>          self.hi_there["text"] = "Hello",
>         self.hi_there["command"] = self.say_hi
>
>         self.hi_there.pack({"side": "left"})
>
>     def __init__(self, master=None):
>          Frame.__init__(self, master)
>         self.pack()
>         self.createWidgets()
>
> var root = Tk()
> app = Application(master=root)
> app.mainloop()
> root.destroy()
>
> On Sun, May 4, 2008 at 12:33 PM, Q4 <q4 at invalid.com> wrote:
>
> > On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshelter at gmail.com>
> > wrote:
> >
> >
> >
> > > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > > some Tkinter examples, including the one from the library reference,
> > > but they don't seem to do anything! Shouldn't there be, like, a
> > > dialog?
> > >
> > > I'm running Windows XP and using IDLE. You can assume my version of
> > > Python is the latest.
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
> > If you just copy the code from the python doc the indentation might be
> > broken.
> > Send the code and I'll take a look at it.
> >
> > Do you get any errors?
> >
> > --
> > My website:
> >  http://www.riddergarn.dk/koder/
> >
> >
>
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From hdante at gmail.com  Mon May 19 12:11:40 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 09:11:40 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
Message-ID: <62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>

On May 19, 7:03?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Vicent Giner a ?crit :
>
> > Hello.
>
> > I am new to Python. It seems a very interesting language to me. Its
> > simplicity is very attractive.
>
> > However, it is usually said that Python is not a compiled but
> > interpreted programming language
>
> cf my answer to you and Henrique on this.
>
> > I am working on my PhD Thesis, which is about Operations Research,
> > heuristic algorithms, etc., and I am considering the possibility of
> > programming all my algorithms in Python.
>
> > The usual alternative is C, ?but I like Python more.
>
> Then use it.
>
> > The main drawbacks I see to using Python are these:
>
> > * As far as I understand, the fact that Python is not a compiled
> > language makes it slower than C, when performing huge amounts of
> > computations within an algorithm or program.
>
> In which way is this a problem here ? I thought your thesis was about
> algorithm, not about implementation optimisation ? And if it's the
> later, then even C might sometimes be too high level - you should drop
> to assembly language.
>
> > * I don't know how likely it is to find libraries in Python related to
> > my research field.
>
> I can't tell but you'd be surprised by the quantity of available Python
> libs.
>
> > * I know Python is a "serious" and mature programming language, of
> > course. But I do not know if it is seen as "just funny" in a research
> > context. Is Python considered as a good programming language for
> > implementing Operations Research algorithms, such as heuristics and
> > other soft-computing algorithms?
>
> Don't know if this answers your question, but it seems that at least
> some authors consider it a good choice:http://www.oreilly.com/catalog/9780596529321/
>
> All code examples in this books are in Python - very badly written
> Python, alas...
>
> > Maybe this is not the right forum, but maybe you can give me some
> > hints or tips...
>
> Hem... Obviously, most people here will have a little biased, you know ?-)

 I agree with what most people here said, that the language doesn't
really matter, etc., but that simply does not apply to the specific
case of optimization research.

 The little I know about optimization, even trivial problems may be
hairy problems. Na?ve implementations simply don't finish and the
performance bottlenecks are not necessarily in the numeric computation
algorithms (so numpy doesn't help much here). If the guy is doing
research on that, it possible that he will work with thousands (or
millions) of weird constraints.

 I'm pretty sure about that: when the algorithms take 4 hours to test
a single execution, you value processor time.

 The situation would be simpler if there were good well-known toolkits
for optimization in python (like numpy for matrix operations), but
that's not the case.


From jonathan.barbero at gmail.com  Fri May 16 11:33:18 2008
From: jonathan.barbero at gmail.com (Jonathan Barbero)
Date: Fri, 16 May 2008 12:33:18 -0300
Subject: IDE for Python
Message-ID: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>

Hi!

 I?m newbie with Python and to learn it better I want to use a good IDE to
concentrate on Python power. There is any IDE like Eclipse for Java for
Python? If not, what is the best Python?s IDE for you?

 Thanks,

   Jonathan.
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From bellman at lysator.liu.se  Tue May 20 09:56:02 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 13:56:02 +0000 (UTC)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <g0ul9i$hjr$1@news.lysator.liu.se>

Zack <zhalbrecht at gmail.com> wrote:

> There's nothing wrong (that I know of) by doing it as I have up there,
> but is there a simpler, easier way? Looking forward to hearing about
> how much of a n00b I am. Thanks in advance!

You want the defaultdict type:

    import collections
    d = collections.defaultdict(lambda: 0)
    for person in People:
	fav_food = person.fav_food
	d[fav_food] += 1

New in Python 2.5, so if you require older Python versions, you
can't use that.  Note also that this can become slow if most keys
are unique; the function given to defaultdict will be called the
first time a key is mentioned, and if the keys are mostly unique,
that will be the majority of the times, and calling a pure Python
function is fairly slow in CPython.  (It probably won't matter
unless you have many thousands of unique keys, though.)


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"If you ignore performance problems long enough, they   !    bellman @
 somehow seem to go away."          -- Barry A Warsaw   ! lysator.liu.se


From ian.g.kelly at gmail.com  Fri May  9 18:58:08 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Fri, 9 May 2008 16:58:08 -0600
Subject: Property in derived class
In-Reply-To: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <3fc761710805091558g3a494d2bt54a88364d235bd41@mail.gmail.com>

On Fri, May 9, 2008 at 3:20 PM, Joseph Turian <turian at gmail.com> wrote:
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?

One way is to have the property refer to a proxy that performs the
late binding, which might look something like this:

    def _bar(self):
        return self.bar()

    prop = property(fget=_bar)

Another way is to declare properties using something like the
following indirectproperty class.  I haven't thoroughly tested this,
so I don't know whether it works exactly right.

class indirectproperty(object):

    def __init__(self, sget=None, sset=None, sdel=None):
        self.sget = sget
        self.sset = sset
        self.sdel = sdel

    def __get__(self, instance, owner):
        if instance is not None:
            fget = getattr(instance, self.sget)
        else:
            fget = getattr(owner, self.sget)
        return fget()

    def __set__(self, instance, value):
        fset = getattr(instance, self.sset)
        fset(value)

    def __delete__(self, instance):
        fdel = getattr(instance, self.sdel)
        fdel()


class Foo(object):
    def func(self): return "foo"
    callfunc = indirectproperty(sget="func")

class Bar(Foo):
    def func(self): return "bar"


From castironpi at gmail.com  Thu May 15 19:53:24 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:53:24 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
Message-ID: <b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>

On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > On May 15, 3:47 pm, m... at pixar.com wrote:
> >> I'm cleaning up some old code, and want to see what orphan
> >> functions might be sitting around.
>
> >> Is there a static call tree analyzer for python?
>
> > How about
> >http://pycallgraph.slowchop.com/
>
> > ...
> > Jay Graves
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Have you checked to see if PyChecker or pylint can help you?
> Apparently they can find unused variables at least, I don't know
> whether they do functions or not.

I think of dynamic programming and dynamic code, but voice.  Does that
mean sing about it?


From frankdmartinez at gmail.com  Mon May 12 09:16:20 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Mon, 12 May 2008 06:16:20 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com> 
	<ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com> 
	<pan.2008.05.11.07.19.22.159479@virgilio.it>
Message-ID: <1c99de2e-96db-4fd7-8a0e-7f366c32ebb7@56g2000hsm.googlegroups.com>

On May 11, 3:19?am, Francesco Bochicchio <bock... at virgilio.it> wrote:
> But there is not such a thing, in Python. What you have is that A
> has the same attributes/methods of B plus its own.
> What you could do is ?adding in class A a method like this:
>
> ? class A(B):
> ? ? ?...
> ? ? ?def set_b_attributes(self, instance_of_b):
> ? ? ? ? ?for k, value in instance_of_b.__dict__:
> ? ? ? ? ? ? ? ? setattr(self, k, value )
>
> and the use it like this:
>
> ? ?a1.set_b_attributes(b1)

Hi, Francesco.
    Thanx!  That's actually exactly what I needed (though I didn't
know it).


From hdante at gmail.com  Tue May 27 20:56:57 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Tue, 27 May 2008 17:56:57 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <2c41298e-5041-4756-8fc4-c10d165a81b2@b1g2000hsg.googlegroups.com>

On May 26, 3:34?pm, notnorweg... at yahoo.se wrote:
>
> what is the definition of a highlevel-language?
>
 There's no formal definition of high level language. Thus, the
following are true:

 1) You can safely treat it as buzzword
 2) You can't formally define a level hierarchy of languages
 3) You can't formally classify any language as high, low, etc. level
 4) Language theory literature ignore this term, so it's also
irrelevant
 5) You can use it to vaguely criticize a language that you don't like
as being too high/low level :-)
 6) You shouldn't try to label a language as high level or low level
or something else without a context
 7) You probably should ignore this term

 Now we have a problem. How can we define the "easiness" of a
language ?

 I think a good way to do this is simply list the language
architecture/paradigms and philosophy and let the listener decide by
himself if it's an "easy" language or not.

 For a great example, see the description of python at:

 http://www.python.org/about/



From kamhung.soh at gmail.com  Mon May 12 19:53:42 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 09:53:42 +1000
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
	<48284E1C.5050107@bigfoot.com>
Message-ID: <op.ua2fbsnfev04yd@melwxp23>

On Tue, 13 May 2008 00:03:08 +1000, Ricardo Ar?oz <ricaraoz at gmail.com>  
wrote:

> Ville Vainio wrote:
>> On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
>>
>>> All these examples assume your regular expression will not span  
>>> multiple
>>> lines, but this can easily be the case. How would you process the file
>>> with regular expressions that span multiple lines?
>>  re.findall/ finditer, as I said earlier.
>>
>
> Hi, sorry took so long to answer. Too much work.
>
> findall/finditer do not address the issue, they merely find ALL the  
> matches in a STRING. But if you keep reading the files a line at a time  
> (as most examples given in this thread do) then you are STILL in trouble  
> when a regular expression spans multiple lines.
> The easy/simple (too easy/simple?) way I see out of it is to read THE  
> WHOLE file into memory and don't worry. But what if the file is too  
> heavy? So I was wondering if there is any other way out of it. Does grep  
> read the whole file into memory? Does it ONLY process a line at a time?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Standard grep can only match a line at a time.  Are you thinking about  
"sed", which has a sliding window?

See http://www.gnu.org/software/sed/manual/sed.html, Section 4.13

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From vadim.pestovnikov at gmail.com  Thu May  1 11:46:15 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 08:46:15 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
	<675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
	<4819E4AF.4060103@v.loewis.de>
Message-ID: <55b033af-4c84-4e29-9dcd-598e7cde7057@m44g2000hsc.googlegroups.com>

On May 1, 11:41 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > Martin, could you please tell me how to do this, I am pretty new in
> > Solaris.
>
> It's fairly complicated, so I'm not sure I can give you the full
> tutorial in a Usenet message.
>
> In essence, you need to spot the linker line in the build process,
> (e.g. by the -o option to the compiler), and add -lm to it.
>
> If you cannot do this on your own, I recommend you hire somebody
> who can.
>
> Regards,
> Martin

Thanks Martin,
For sure I am not maintainer :).

Thanks for the help and explanations.


From duncan.booth at invalid.invalid  Fri May  2 08:26:50 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 12:26:50 GMT
Subject: no cleanup on TERM signal
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
	<mailman.450.1209722397.12834.python-list@python.org>
Message-ID: <Xns9A9288AF8AE6Cduncanbooth@127.0.0.1>

Christian Heimes <lists at cheimes.de> wrote:

>> res = create_resource()
>> try:
>>    use_resource()
>> finally:
>>    res.close() # Must free resource, but the object can still be
>>    alive... 
> 
> You can replace the try/finally code with a "with resource:
> do_something()" block if the object supporst the context manager
> protocol. 
> 

or replace it with:

 with contextlib.closing(create_resource()) as res:
     do_something()

if the object does not support the context manager protocol.


From larry.bates at websafe.com`  Fri May  9 14:37:44 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 09 May 2008 13:37:44 -0500
Subject: Web Framework suggestions for a RIA type application for managing
	lab  specimens
In-Reply-To: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
References: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
Message-ID: <4rudnZWRbKoYBLnVnZ2dnUVZ_sCtnZ2d@comcast.com>

rynt wrote:
> Hello all.
> 
> I'm Looking for suggestions for which Python web framework(e.g.
> Django, Turbogears,etc.) would work best to develop a cross platform
> browser based system to manage lab specimens.
> 
> Requirements are:
> a. highly secure
> b. run on internet or intranet
> e. RDBMS read/write intensive
> d. be able to work on-line or off-line (with automatic updates to db
> when coming back on-line)
> e. be able to print reports and labels using a variety of
> printers(laser, deskjet, label printers)
> f. have a rich set of desktop-like components
> 
> Perhaps a web based app isn't the way to go.  Arguments for and
> against gratefully accepted.
> 
> Pros and Cons for any frameworks gratefully accepted.
> 
> Perhaps a framework isn't really what's needed here, but a combination
> of different web components and technologies?
> 
> Anyway, I'm grateful for any ideas you may be able to give me.
> 
> Thanks
> Ruben
> 

 > a. highly secure

Can be accomplished with XMLRPC over HTTPS if you want web application or you 
can use something simple like RDP to hosted application.

 > b. run on internet or intranet

Most applications that have a database backend can do this if written properly.

 > e. RDBMS read/write intensive

This might push me to something like RDP (or xWindows), but it depends on where 
the data is coming from that causes the 'intense' writing and the nature of the 
'intense' reading'.  You certainly don't want to be moving the data over the 
Internet any more than is necessary.

 > d. be able to work on-line or off-line (with automatic updates to db
 > when coming back on-line)

This would require quite a lot of work and using some sort of DB 
synchronization.  This item is the holy grail that many try to achive, but IMHO 
few actually fully achieve it.

 > e. be able to print reports and labels using a variety of
 > printers(laser, deskjet, label printers)

Web applications are REALLY bad a printing.  They have no real ability to 
interact with a printer like a client application does.  If I wanted to drive 
label printers, I would use a client hosted application (but might get the data 
from a remote server via XMLRPC, WEBDAV, etc).

 > f. have a rich set of desktop-like components

You can use components like Yahoo User Interface (YUI) or Google Web Toolkit. 
(GWT) but they are nothing like the rich set of tools you get from wxWindows, 
QT, etc. on a client application and development takes a LOT longer to get 
correct.  The disconnected nature of the Web can make applications that are 
trivial when written as client-server, quite difficult.

 From what you have given me, I would lean towards a hosted application with RDP 
connection.  A lot more information would be required to make the final choice 
of development architecture, languages, database, UI toolkits, etc.

Hope this helps.

-Larry Bates


From python at rcn.com  Mon May  5 04:16:42 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 5 May 2008 01:16:42 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org> 
	<fvirho$15ti$2@news.mtu.ru>
	<9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>
Message-ID: <ca7ce69b-c108-492d-80ac-29d4582c1cc7@1g2000prg.googlegroups.com>

> > > However I find the seccond argument hack ugly. Does the sum way have any
> > > performance advantages over the reduce way?
>
> > Yes, sum() is faster:
...

> Not really; you measure the import and the attribute access time in
> the second case. sum() is 2x faster for adding numbers only:

Try it with Py2.6 or Py3.0.  The sum() function has been optimized and
should be at least 6x faster for summing ints and floats.  It should
even beat psyco optimized sums!


Raymond


From paddy3118 at googlemail.com  Fri May  9 14:37:21 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 9 May 2008 11:37:21 -0700 (PDT)
Subject: Wanted: Citation supporting Duck Typing
References: <2385391e-f550-43be-b52e-cc23ba4f5381@d45g2000hsc.googlegroups.com>
Message-ID: <014a1de8-3300-4920-b3dd-3bf452b49fc5@t54g2000hsg.googlegroups.com>

On May 9, 6:30 pm, Paddy <paddy3... at googlemail.com> wrote:
> Hi,
> The wikipedia article on Duck Typing has this criticism section that
> needs a citation:
> (Fron:http://en.wikipedia.org/wiki/Duck_typing#Criticism)
>
> An often cited criticism is this:
>     One issue with duck typing is that it forces the programmer to
> have a much wider understanding of the code he or she is working with
> at any given time. In a strongly and statically typed language that
> uses type hierarchies and parameter type checking, it's much harder to
> supply an unexpected object type to a class. For instance, in python,
> you could easily create a class called Wine, which expects a class
> implementing the "press" method as an ingredient. However, a class
> called Trousers might also implement the press() method. With Duck
> Typing, in order to prevent strange, hard to detect errors, the coder
> needs to be aware of each potential use of the method "press", even
> when it's conceptually unrelated to what he or she is working on. With
> type checking and hierarchical type declarations, all wine ingredients
> would be subclasses of WineIngredient or something like that, negating
> the problem.
>
>     In essence, the problem is that, "if it walks like a duck and
> quacks like a duck", it could be a dragon doing a duck impersonation.
> You may not always want to let dragons into a pond, even if they can
> impersonate a duck.
>
> In practice, the issue is equivalent to not mixing dissimilar objects
> for duck-typing and is handled almost transparently as part of the
> knowledge of the codebase required to maintain it.[citation needed]
>
> I've only found this so far as a citation:
>  http://jessenoller.com/2007/05/30/typeducking-on-duck-vs-static-typing/
> Whilst it is good, do you know any other work that refutes the
> criticism?
>
> (I, and many others don't see the problem, but who has written about
> it).
>
> Thanks, Paddy.

A bit more searching gives me:

  http://hans.fugal.net/blog/articles/2006/07/08/duck-typing-defended
And:
  http://www.mindview.net/WebLog/log-0025

I don't have a collection of Dynamic language books though.

- Paddy.


From gagsl-py2 at yahoo.com.ar  Thu May  1 06:52:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 07:52:02 -0300
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
	<mailman.398.1209633049.12834.python-list@python.org>
	<7292bae2-993e-41cc-8f0e-8d1339ecebdf@25g2000hsx.googlegroups.com>
Message-ID: <op.uag1s0k3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 06:21:22 -0300, n00m <n00m at narod.ru> escribi?:

>> > import difflib
>> > s = difflib.SequenceMatcher(None, s1, s2)
>> > print s.find_longest_match(0, len(s1), 0, len(s2))
>> > (0, 0, 0)
>> >
>> > I think it's line #314 in difflib "who's to blame" --
>>
>> Me too. Could you think of some alternative? Simply disabling that
>> "popularity check" would slow down the algorithm, according to the
>> comments.
>
> No idea :)

The "ignore popular elements" is only an optmization, and it should not be  
applied in your case because it forces the algorithm to yield an invalid  
result.
I can think of two alternatives:
- tune up the conditions when the optimization is used, or
- make it user configurable

SequenceMatcher is a public class, and it is also internally used by  
Differ and others to compare both sequences of lines *and* pairs of  
similar lines (considered as sequences of characters). In this last usage  
the "ignore popular elements" has no much sense, as shown in your example  
feeding directly two dissimilar strings.
In principle one should disable the "populardict" stuff when dealing with  
strings. Below is a simple attempt to detect that case:

(around line 311 in difflib.py)

         b_is_string = isinstance(b, basestring) # add this line
         for i, elt in enumerate(b):
             if elt in b2j:
                 indices = b2j[elt]
                 if not b_is_string and n >= 200 and len(indices) * 100 >  
n: # change this line
                     populardict[elt] = 1
                     del indices[:]
                 else:
                     indices.append(i)
             else:
                 b2j[elt] = [i]


-- 
Gabriel Genellina



From paul at boddie.org.uk  Mon May  5 17:36:46 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 5 May 2008 14:36:46 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
Message-ID: <3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>

On 5 Mai, 20:26, vivai... at gmail.com (Ville M. Vainio) wrote:
>
> Basically, avoiding GPL maximizes the brainshare that a small-ish tool
> is going to attract, and many (including myself, FWIW) view GPL as a
> big turn-off when I consider spending some time to familiarize myself
> with a tool, or recommending it to someone else.

I'd like to cast a vote for the opposing camp: I'm probably more
likely to look at GPL-licensed code, although I recognise that I have
the benefit of not having anyone superior to me wanting to release
proprietary software. Applications and tools are ideal candidates for
GPL-licensing, although I also recognise that someone might want to
adapt the code for a library, and that they might not feel comfortable
with the copyleft aspects of the resulting licence on that library.

Anyway, I'm just confirming that I'm clearly not one of the "many"
described above. A lot of my own work is licensed under the GPL or
LGPL, and while I'd be the first to admit that not much of what I've
written is wildly popular, I think the reasons for not using it purely
because of the licences are typically overstated.

Paul


From kyosohma at gmail.com  Fri May 23 16:54:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:54:43 -0700 (PDT)
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
Message-ID: <08424ab8-e5c4-4aca-a492-1410e56f38a2@y38g2000hsy.googlegroups.com>

On May 23, 1:59?pm, tinn... at isbd.co.uk wrote:
> I'm desperately trying to move a Microsoft Access database application
> (a simple accounts system I wrote myself) to Linux. ?Python is one of
> my preferred programming laguages so I wonder if there are any good
> Python 'frameworks' for writing database applications, in particular I
> need good reporting and forms writing facilities. ?The basic database
> and logic/arithmetic seem fairly simple to me.
>
> --
> Chris Green

You might take a look at Dabo. It's made for databases and is pretty
cool.

http://dabodev.com/

Not sure what else is out there.

Mike


From florencio.cano at gmail.com  Sun May 11 04:44:42 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Sun, 11 May 2008 10:44:42 +0200
Subject: Some error messages in Python are ugly
In-Reply-To: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <c496e0a70805110144g2fb69158xe3d76a4cbc11928e@mail.gmail.com>

This is not a Python error, this is a bash message that appears when
you press ctrl+z and put the application in the background. Execute fg
to return the app to the foreground.

2008/5/11  <wxPythoner at gmail.com>:
> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?


From greg at cosc.canterbury.ac.nz  Tue May 20 23:01:55 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 21 May 2008 15:01:55 +1200
Subject: Code/test ratio wrt static vs dynamic typing [was: Re: Python
	Success stories]
In-Reply-To: <e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
Message-ID: <69hi0iF32kli9U1@mid.individual.net>

Someone wrote:
>>>I'm just curious whether this
>>>argument against dynamic typing - that you end up doing the job of a
>>>static compiler in test code - holds in practice.

I suspect that, although some of the things caught
by the tests would be caught by static typing, the
very *same* tests are also catching a lot of things
that wouldn't be caught by static typing.

Also, I don't think it's valid to equate the size of
the tests with the amount of effort it took to develop
them. For instance, the test suite for Pyrex is currently
larger than the Pyrex compiler, but I've still spent
far more time and effort developing the compiler than
writing the tests.

-- 
Greg


From subhabrata.iisc at hotmail.com  Wed May 28 09:59:28 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 06:59:28 -0700 (PDT)
Subject: Error handling in Python
Message-ID: <5d6a51a9-3d35-4c99-b7ef-fa79f950ece8@l17g2000pri.googlegroups.com>

Dear Members of the group,
If I open a url by urlopen in the urllib, the file is either opening a
file or if no url is there it would give error. The error is generated
can be handled by IOError handling schemes.
But if there are thousands or millions of URLs and I do not know who
will open and who won't open. How can I handle this kind of situation?
If any one can help solving this problem.
Regards,
Subhabrata.


From Tymoteusz.Jankowski at gmail.com  Fri May  9 13:05:34 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Fri, 9 May 2008 10:05:34 -0700 (PDT)
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
	<68il63F2su97jU5@mid.uni-berlin.de>
Message-ID: <cc7d10bb-5fed-4256-a8cc-99fd6765b23d@x41g2000hsb.googlegroups.com>

On May 9, 11:52?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> Maybe it's also harder to read than this::
>
> ? print '-'.join(map(str, time.localtime()[:3]))

I like this concept, it's so, .. ziped :)

> Of course, if you don't mind the extra padding zeroes in day and month::
>
> ? print time.strftime('%Y-%m-%d')

I'll be humble, it covers my need the most :)
If you have a lack of knowladge you work harder...
One instruction (besides 'print')... . Do you believe it? :)


> You are a little bit inconsistent with the arguments. ?`g` is explicitly
> mentioned in ``list(g)``. ?But why the intermediate names at all?
>

That's right, because it was just a scratch of an idea..
The point of the idea was this...
I read from left to right, and because of that it's easier to me
follow this way of writing (you only follow by one direction and the
value is handing over, from left to rigght ...):

value -> do_something -> result -> action_on_the_result -> ...

than this multiline lvalues assignes

variable = value # I take a look at the left then the right
result = do_something(variable) # Here I check also left and right
side, and perhaps I (a short memory) may check the line over
action_on_the_result(result)
...

However, I've just found out, that even the more difficult method to
me isn't so scary if I read it like this
...
6 7
4 5
2 3
  1
However the 2nd:
because there is:
print '-'.join(map(str, time.localtime()[:3]))

so i'm not serious convincing anyone :)


> Maybe you should look into languages like SmallTalk or Io where everything
> is done with method calls. ?Your example in Io::

I took a brief look at them, and Python is still Nr OnE :)


From steven.klass at gmail.com  Wed May 14 19:07:30 2008
From: steven.klass at gmail.com (rh0dium)
Date: Wed, 14 May 2008 16:07:30 -0700 (PDT)
Subject: More fun with PyParsing - almost did it on my own..
Message-ID: <bba49cff-a4aa-4fb1-9f1d-1c6436275585@w8g2000prd.googlegroups.com>

Hi all,

I almost did my first pyparsing without help but here we go again.
Let's start with my code.  The sample data is listed below.

# This will gather the following ( "NamedPin" "PinDirection"
"OptionalSignal" )
guts = Group( LPAR.suppress() +
quotedString.setParseAction(removeQuotes).setResultsName("name") +
quotedString.setParseAction(removeQuotes).setResultsName("direction")
+
Optional(quotedString.setParseAction(removeQuotes).setResultsName("signal"))
+ RPAR.suppress())

# This will simply wrap the Cell Info around it
cell = Group( Literal("dbSetCellPortTypes").suppress() +
quotedString.setParseAction(removeQuotes).setResultsName("library") +
quotedString.setParseAction(removeQuotes).setResultsName("name") +
Literal("'").suppress() +  LPAR.suppress() +
OneOrMore(guts).setResultsName("pins") + RPAR.suppress() ) +
Literal("#f").suppress() | Literal("#t").suppress()

# This grabs many cells
cells = OneOrMore(cell)

OK and it sorta works if I do the following:

x =  cells.parseString(data)
print x[0].asDict()

reveals
{'pins': ([(['A', 'Input'], {'direction': [('Input', 1)], 'name':
[('A', 0)]}), (['B', 'Input'], {'direction': [('Input', 1)], 'name':
[('B', 0)]}), (['Y', 'Output'], {'direction': [('Output', 1)], 'name':
[('Y', 0)]}), (['VDD', 'Inout', 'Power'], {'direction': [('Inout',
1)], 'name': [('VDD', 0)], 'signal': [('Power', 2)]}), (['VSS',
'Inout', 'Ground'], {'direction': [('Inout', 1)], 'name': [('VSS',
0)], 'signal': [('Ground', 2)]})], {}), 'name': 'AND2X1', 'library':
'stdcell130'}

As you can see the Pins is all jacked up and I want is not that.  I
want the following

{ 'name': 'AND2X1',
  'library':'stdcell130'
  'pins': [ { 'name': 'VSS', 'direction':'Inout', 'signal':'Ground'},
             { 'name': 'VDD', 'direction':'Inout', 'signal':'Power'},
             { 'name': 'A', 'direction':'Input' },
             { 'name': 'B', 'direction':'Input' },
             { 'name': 'Y', 'direction':'Output' } ]
}

What did I do wrong in my code..

Thanks again!

           ]




I would expect my results to look like this:

But to get any info I must do this

print x[0].asDict()

which is not really what  want.
What I expect is this:
[


data = """dbSetCellPortTypes "stdcell130" "AND2X1" '(
  ("A" "Input" )
  ("B" "Input" )
  ("Y" "Output" )
  ("VDD" "Inout" "Power" )
  ("VSS" "Inout" "Ground" )
) #f
dbSetCellPortTypes "stdcell130" "AND2X2" '(
  ("A" "Input" )
  ("B" "Input" )
  ("Y" "Output" )
  ("VDD" "Inout" "Power" )
  ("VSS" "Inout" "Ground" )
) #f """


From arnodel at googlemail.com  Tue May 20 10:43:41 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 15:43:41 +0100
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <m2y7656noi.fsf@googlemail.com>

brad <byte8bits at gmail.com> writes:

>> Vicent Giner wrote:
>
>> The usual answer is that development time is more important than
>> running time.
>
> This depends. Run time is not important until you are asked to scale
> to millions or billions of users or computations or large data
> sets. I've seen this first hand. Getting results back the same day or
> sooner may be important. In cases such as this, I use C or
> C++... nothing else will do. Nothing else is as fast. Although I
> always keep a py version around for testing and for smaller
> tasks. Don't get me wrong, I love Python, but there are times when
> nothing, but pure, hard speed will do.

Sure.  Be careful not to overdose on it though.

-- 
Arnaud


From notnorwegian at yahoo.se  Mon May 26 22:46:43 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 19:46:43 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
Message-ID: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>

>>> x
[',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
'clever', 'handsome']
>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>>> x
[',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
'clever', 'handsome']
>>>

what do i need to do?


From larry.bates at websafe.com`  Tue May  6 16:20:57 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 06 May 2008 15:20:57 -0500
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <euadncAHXvcmIL3VnZ2dnUVZ_r7inZ2d@comcast.com>

jmDesktop wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

Zope has an implementation of interfaces that Zope 3 and Twisted both use if you 
want to take a look.

http://www.zope.org/Products/ZopeInterface

Frankly, I've never missed them.

-Larry



From castironpi at gmail.com  Wed May 14 14:09:36 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:09:36 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com>
Message-ID: <8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com>

On May 14, 1:07?pm, castiro... at gmail.com wrote:
> On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > How does it generate text?
>
> > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > place to start the ring.
>
> > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > some cubic verticals.
>
> > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > can pretty well win work.- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > - Show quoted text -
>
> > If Python can plot in to chess, and Tron rings live, then why not
> > group it knew?- Hide quoted text -
>
> > - Show quoted text -
>
> That would be know. ?Plot and split in too.- Hide quoted text -
>
> - Show quoted text -

Now can I catch function-type objects from a throw?  I'm crossing all
of those.


From mail at timgolden.me.uk  Thu May 29 05:55:08 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 10:55:08 +0100
Subject: Finding file details...
In-Reply-To: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
Message-ID: <483E7D7C.5080605@timgolden.me.uk>

Kalibr wrote:
> I've been trying to figure out how to find the details of files
> (specifically music for now) for a little sorting script I'm making,
> My aim is to get details on the artist, album, and genre for mp3 and
> wma files (possibly more in the future). My closest match was when I
> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
> to help (and most of it went over my head). Is there any module I can
> use to find this sort of data? I'm trying to not make it specialised
> in music, because I may want to extend this to picture, movie, text
> etc. files in the future. Any ideas how I could go about this?

You don't say, but I assume you're on Windows since you mention
GetFileVersionInfo (which doesn't have anything to do with media
files, by the way) and WMA. There may be packages out there
to do all this already but if not you'll need to pull in a few disparate
modules and mix'n'match.

While ID3 readers (which determine the metadata for MP3) are reasonably
common few of them come ready-compiled for Windows. I've used Ned
Batchelder's id3reader [1] successfully for simple tasks so you might try
that. On the WMA side, you can automate Windows Media Player to get
metadata. (And it might work for .mp3; I've not tried).

<code>
import win32com.client

player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
try:
  artist = wmedia.getItemInfo ("Artist")
finally:
  player.mediaCollection.remove (wmedia, False)

print "bells.mp3 has artist", artist

</code>

You're going to have to dig around for docs on this one. And it's not
pretty. Try starting from: 

http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx

TJG

[1] http://nedbatchelder.com/code/modules/id3reader.html


From google at mrabarnett.plus.com  Thu May 22 13:05:42 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 22 May 2008 10:05:42 -0700 (PDT)
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
Message-ID: <ae23c0ab-62e8-486c-b79b-a1672c1c666d@d45g2000hsc.googlegroups.com>

On May 22, 3:20 pm, s0s... at gmail.com wrote:
> On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>
> > > Hi, I wanted to know how cautious it is to do something like:
>
> > > f = file("filename", "rb")
> > > f.read()
>
> > > for a possibly huge file. When calling f.read(), and not doing
> > > anything with the return value, what is Python doing internally? Is it
> > > loading the content of the file into memory (regardless of whether it
> > > is discarding it immediately)?
>
> > I am not a Python interpreter developer, but as user, yes I'd expect that to
> > happen. The method doesn't know you are not doing anything with its return
> > value.
>
> > > In my case, what I'm doing is sending the return value through a
> > > socket:
>
> > > sock.send(f.read())
>
> > > Is that gonna make a difference (memory-wise)? I guess I'm just
> > > concerned with whether I can do a file.read() for any file in the
> > > system in an efficient and memory-kind way, and with low overhead in
> > > general. (For one thing, I'm not loading the contents into a
> > > variable.)
>
> > Doesn't matter. You allocate a string in which the contents is loaded (the
> > return value of 'f.read()', and you hand over (a reference to) that string to
> > the 'send()' method.
>
> > Note that memory is allocated by data *values*, not by *variables* in Python
> > (they are merely references to values).
>
> > > Not that I'm saying that loading a huge file into memory will horribly
> > > crash the system, but it's good to try to program in the safest way
> > > possibly. For example, if you try something like this in the
>
> > Depends on your system, and your biggest file.
>
> > At a 32 bit platform, anything bigger than about 4GB (usually already at around
> > 3GB) will crash the program for the simple reason that you are running out of
> > address space to store bytes in.
>
> > To fix, read and write blocks by specifying a block-size in the 'read()' call.
>
> I see... Thanks for the reply.
>
> So what would be a good approach to solve that problem? The best I can
> think of is something like:
>
> MAX_BUF_SIZE = 100000000  # about 100 MBs
>
> f = file("filename", "rb")
> f.seek(0, 2)  # relative to EOF
> length = f.tell()
> bPos = 0
>
> while bPos < length:
>     f.seek(bPos)
>     bPos += sock.send(f.read(MAX_BUF_SIZE))

I would go with:

f = file("filename", "rb")
while True:
    data = f.read(MAX_BUF_SIZE)
    if not data:
        break
    sock.sendall(data)


From robert.kern at gmail.com  Tue May 20 18:59:30 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 20 May 2008 17:59:30 -0500
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48335269.2000809@admailinc.com>
References: <48335269.2000809@admailinc.com>
Message-ID: <g0vl4i$km7$1@ger.gmane.org>

Ethan Furman wrote:
> Greetings,
> 
> I'm looking at the struct module for binary packing of ints and floats.  
> The documentation refers to C datatypes.  It's been many years since I 
> looked at C, but I seem to remember that the data type sizes were not 
> fixed -- for example, an int might be two byes on one machine, and four 
> bytes on the next.  Can any C programmers verify this?  If it is true, 
> does that mean that struct.pack('h', 8001) might give me different 
> results depending on the machine it's running on?

Right. I believe (but could be wrong) that "char" is defined to be one byte, but 
that "short", "int", "long", and "long long" are defined as "at least as big as 
the previous type".

In practice, though, on nearly every machine that Python runs on, "char" is one 
byte, "short" is two bytes, and "int" is four bytes. "longs" and "long longs" 
tend to vary substantially, though; never assume sizes for them.

Single-precision floats are always four bytes and double-precision floats are 
always eight bytes. "long doubles" vary; they could be twelve bytes or sixteen.

If you want to deal with fixed sizes, use struct.calcsize() to test the sizes of 
each of the integer types, assign them to width-specific aliases, and always use 
these aliases.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun May  4 06:17:24 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 04 May 2008 12:17:24 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
Message-ID: <685gpkF2r5j39U1@mid.individual.net>

Gary Herron wrote:

> No NO NO!   The only way to increment a variable in memory is
> through a three step process:
> 
>   Load a register from a memory location
>   Increment the register
>   Store the value back into memory.

I suggest you read "Intel 64 and IA-32 Architectures Software
Developer's Manual" (2A, Instruction Set Reference A-M). INC and
DEC can have register *or* memory location as operand, and can be
executed atomically even in multiprocessor environments (LOCK
prefix).
 
> Ages ago, there were architectures that would do an increment on a
> memory location in an atomic way, but with the current (RISC)
> architectures these are three separate operations.

That may be true for RISC architectures. Unfortunately, all 8086
based CPUs are CISC.

Regards,


Bj?rn

-- 
BOFH excuse #277:

Your Flux Capacitor has gone bad.



From jhenRemoveThis at talk21.com  Sat May 31 13:50:09 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sun, 01 Jun 2008 03:50:09 +1000
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
Message-ID: <6adhelF371mogU1@mid.individual.net>

globalrev wrote:

> i want to build a service where you can send an SMS with your
> cellphone to my website and then the site will collect the
> data you asked for and SMS it back.
> 
> so what components would i need for that?

Arguably the simplest route is to use a phone with a serial
connection to a computer, whether that connection be RS232,
USB, IrDA or Bluetooth.

For outgoing messages in large volume, SMS lodgement directly to
an SMSC (message centre) via SMPP over an internet connection
is likely to be a cheaper option in the long term.  But that'll
depend on what's on offer in your part of the world.

There's probably some means of receiving messages without using
your own hardware, but I'm not aware of any details.

If using your own hardware, I'd suggest a cellular modem rather
than a handset.  These are permanently powered by a low voltage
DC supply, rather than a battery you need to keep charged
without destroying it with constant overcharge.

And a modem is more likely to support text-mode command
interactions with your computer rather than raw PDU-mode
interactions.  PDU-mode requires your software to translate
to/from the raw transmitted SMS data, but gives you much
greater control.

The rest is software, and your cost will depend on how you get
or develop that.

You might be able to get a SIM (assuming a GSM or UMTS cellular
device) with very cheap SMS rates.  A pre-paid service will
limit your losses if your software ever gets over-enthusiastic
about sending messages.

John


From badmuthahubbard at gmail.com  Mon May 12 19:41:39 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 13 May 2008 02:41:39 +0300
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <8200bab70805121641n7ec4d23ds2efadfa6c65a307d@mail.gmail.com>

I'm another one pretty early in his programming education, but here's my take.
Python was specifically recommended to me by a few people for a
specific program I wanted to write (userspace, GUI, music).  While I
gradually learn more about it, I start to spend a lot of time on
certain aspects I don't really need for this task.  I think curiosity
is one of the vital qualities for a programmer, and through mine, over
a few years, I've built up more and more understanding of what's going
on in my box, more than I set out to have, but I can't see how any of
this can be called wasted time if it rounds out my general
understanding.
On the other hand, as Python is about the second "serious" language
I've tried to learn (the others being web- or music- oriented, and I
didn't approach them as programming), I don't have much to compare it
to.  I was under the impression before reading your message that
Python was very popular and useful.  This list is far more active than
all the others to which I'm subscribed put together!  So, either it
doesn't seem like a silly endeavor to learn it for its own sake, or
they're using it for something.

If it is a silly endeavor, I'm going to have to ask you to stop this
thread, it's too silly.

-Chuckk

On Mon, May 12, 2008 at 8:27 PM, John Salerno <johnjsal at nospamgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
>  Python" each night. Does anyone see any value in learning Python when you
>  don't need to for school, work, or any other reason? I mean, sure, there's
>  value in learning anything at any time, but for something like a programming
>  language, I can't help but feel that I will be mostly unable to use what I
>  learn simply because I have no reason to use it.
>
>  The *process* of learning is enough fun for me, and every now and then I do
>  find a small use for Python that really pays off, but for the most part I'm
>  wondering what people's thoughts are as far as simply learning it for the
>  sake of learning. Does it seem like a silly endeavor to most people? Did
>  anyone here learn a programming language when you didn't need to? If so, how
>  much and in what capacity did you use it after you learned it?
>
>  Hopefully this question even makes sense!
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From bearophileHUGS at lycos.com  Wed May 28 05:28:54 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Wed, 28 May 2008 02:28:54 -0700 (PDT)
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
Message-ID: <15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>

Dennis Lee Bieber, the ghost:
> I'd have to wonder why so many recursive calls?

Why not? Maybe the algorithm is written in a recursive style. A
language is good if allows you to use that style too.
On modern CPUs 50000 levels don't look that many levels.

Bye,
bearophile


From zerge69 at gmail.com  Wed May 21 00:00:07 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Tue, 20 May 2008 21:00:07 -0700 (PDT)
Subject: Port scan module
Message-ID: <e6f545e4-5acb-4a65-a894-11c2e1a03fc8@f24g2000prh.googlegroups.com>

I programmed a port scanning module which you can download here
http://code.google.com/p/portscan/

Including the module in your program allows you to scan specific ports
in an IP, using the function scan(ip,port,timeout). Instead of getting
a cryptic code in return, the function will return "open", "closed",
"filtered", or "timeout".

It's a great way of learning about port scanning with Python


From vbgunz at gmail.com  Wed May 14 10:04:50 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 07:04:50 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
Message-ID: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>

I remember learning closures in Python and thought it was the dumbest
idea ever. Why use a closure when Python is fully object oriented? I
didn't grasp the power/reason for them until I started learning
JavaScript and then BAM, I understood them.

Just a little while ago, I had a fear of decorators because I really
couldn't find a definitive source to learn them (how to with with @).
How important are they? They must be important otherwise why have'em
in the language? I had to learn'em and then suddenly, BAM. I
understand them.

My main issue with closures and decorators was hidden in the fact of
how *dead simple* they were. All I needed were reasons to use them
over doing it X style. So what is my point? How dead simple are class
methods? I must be missing there point so I am convinced they must be
dead simple.

classes, functions, instance and static methods are easy. So easy in
fact, I could shoot myself in the foots without looking (preferably
without aiming). So, why am I stuck on the *idea* of a class method?

An instance method works on the instance
A Static method is basically a function nested within a class object
A class method is overkill?

I can call a static or class method through either the class OR any
instance of it. I've never designed a method that took advantage of
the class name except in cases where I needed to extend a super class
*but* even in this case, I didn't use the enclosing class name...

Whats the deal with class methods, why use them over anything else?
What does a class method accomplish in at least one line shorter than
anything else? Does it help reduce duplication or typing? I am at a
lost for words that can shed at least *one* good reason to use them.

What is the one greatest reason to use them? A little syntax and
explanation can go a long long way. I am failing to understand them so
any help is really appreciated here!


From mail at timgolden.me.uk  Fri May 16 09:25:10 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 14:25:10 +0100
Subject: Problem creating a shorcut
In-Reply-To: <826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>	<322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>
	<826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>
Message-ID: <482D8B36.4000406@timgolden.me.uk>

Mike Driscoll wrote:
> Ah. I was unaware of the Arguments parameter. That works quite well.
> Where does one find this information anyway? I think I found mine from
> bits and pieces scattered in various tutorials.

The canonical place would be:

http://msdn.microsoft.com/en-us/library/bb774950(VS.85).aspx

TJG


From n00m at narod.ru  Tue May  6 01:52:15 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 22:52:15 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <mailman.595.1210009109.12834.python-list@python.org>
Message-ID: <eb8b408f-3454-480c-b248-9385c58973c3@c65g2000hsa.googlegroups.com>


> Yes, call flush() each time you're done writing.

No, it would be too easy & simple.
While stdin is NOT CLOSED stdout has not EOF, but readlines()
waits for its appearence ... and so freezes for good. IMO.
Should be like this:

import popen2
o=popen2.popen2('osql -E -S(local) -dpubs -c"GO" -n -w8000')
while 1:
    o[1].write(raw_input()+'\nGO\n')
    o[1].flush() # this line can be commented
    res=''
    while 1:
        line=o[0].readline()
        if line=='\n': # ??????????????????????????????
            break
        res+=line
    print res

How to break the while loop?
What is the sign of "there is left nothing to read"?

2.
I'm still curious why multiline parameter does not work in Py.
This is how it looks in VBS (and works Ok):

Set w = CreateObject("WScript.Shell")
q = "select * from authors" & vbCrLf
q = q + "select getdate()" & vbCrLf
q = q + "select * from jobs"
Set e = w.Exec("osql.exe -Q""" + q + """")

In shell line it looks like:
osql.exe <...> -Q"select * from bla"


From efurman at admailinc.com  Tue May 13 15:44:31 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 13 May 2008 11:44:31 -0800
Subject: looking for a pdf module
In-Reply-To: <4829B52E.6060903@islandtraining.com>
References: <4829C0B8.9090605@admailinc.com>
	<4829B52E.6060903@islandtraining.com>
Message-ID: <4829EF9F.80009@admailinc.com>

Gary Herron wrote:

> Ethan Furman wrote:
>
>> Greetings!
>>
>> I'm hoping to be able to generate pdf files on the fly -- are there 
>> any python modules out there to do that?
>>
>> All help appreciated!
>> -- 
>> Ethan
>> ------------------------------------------------------------------------
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>
> ReportLabs is a quite extensive open-source project for generating PDF 
> files.
>
>    http://www.reportlab.org/
>
> Enjoy,
>
> Gary Herron
>
Awesome, thanks!
--
Ethan

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From irmen.NOSPAM at xs4all.nl  Mon May 12 07:48:28 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 12 May 2008 13:48:28 +0200
Subject: Import/Create module from buffer
In-Reply-To: <bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
Message-ID: <48282e92$0$14346$e4fe514c@news.xs4all.nl>

Gruik wrote:

> But before that 1 question: what if I'm in Python ?
> Following your solution, I did that in Python :
> 
>     def load_buffer(buffer) :
>         compiled_buffer = compile(buffer, "module_name", "exec")
>         exec(compiled_buffer)
> 
> It works great except that I can't have a module object and that it is
> as if I did "from module import *"
> But I need the module object and not an "import *" behavior.
> Any idea about the way to do that?

Something along the lines of:

import new
mymodule = new.module("mymodule")
exec <<<code>>> in mymodule.__dict__



--irmen


From lists at svrinformatica.it  Fri May 23 10:10:33 2008
From: lists at svrinformatica.it (Mailing List SVR)
Date: Fri, 23 May 2008 16:10:33 +0200
Subject: Python treeview and recursion: help needed
In-Reply-To: <1211527245.7401.3.camel@localhost.localdomain>
References: <1211527245.7401.3.camel@localhost.localdomain>
Message-ID: <1211551833.7401.15.camel@localhost.localdomain>

Il giorno ven, 23/05/2008 alle 09.20 +0200, Mailing List SVR ha scritto:
> ?Hi, 
> 
> I have a database with the following structure:
> 
> id    name  sublevel
> 
> for example
> 
> 1     Node1     None
> 2     Node2     1
> 3     Node3     2
> 4     Node4     None
> 5     Node5     1
> 6     Node6     5
> ....
> ....
> 
> 
> where Node1 and Node4 are treeview's master nodes, Node2 is a subnode of
> Node1, Node3 is a subnode of Node2, Node5 is a subnode of Node1 and
> Node6 a subnode of Node5 and so on
> 
> I need a recursive function to populate treeview and I'm stuck on this
> function :confused:
> 
> I need a list where I have the master node with child node inside and if
> a child node as others child nodes, I need thess nodes inside the child
> nodes.
> 
> Something like this:
> 
> [
> {"id":1,"name":"Node1","Childs":[{"id:2","name":"Node2","Childs":[{"id":3,"name":"Node3","Childs":[]}]},
> {"id":5,
> "name":"Node5","Childs":[{"id":6,"name":"Node6","Childs":[]}]}]},{"id":4,"name":"Node4","Childs":[]}  
> ]
> 
> I'm using django so I access the data as 
> 
> all=Data.objects.all()
> 
> and I can do something like
> 
> for a in all:
>   print a.id
>   print a.name
>   
> to get database value.
> 
> Any help is appreciated,
> 
> thanks,
> Nicola
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

only for the records attacched is a working solution, maybe not the best
one but a working one,

regards
Nicol

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From lists at cheimes.de  Tue May 13 21:14:42 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 03:14:42 +0200
Subject: list.__len__() or len(list)
In-Reply-To: <3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
References: <g0d9sj$m58$1@registered.motzarella.org>
	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
Message-ID: <482A3D02.3020001@cheimes.de>

Ian Kelly schrieb:
> The purpose of obj.__len__() is to implement len(obj), which simply
> calls it.  So obj.__len__() may be faster, but only marginally.  The
> reason to prefer len(obj) is that if you inadvertently pass an object
> that does not implement __len__, you get the more appropriate
> TypeError rather than an AttributeError.

len(obj) is faster than obj.__len__() for several types like str. In
general len() is as least as fast __len__(). len() also does some extra
sanity checks.

python2.5 -m timeit "'abc'.__len__()"
1000000 loops, best of 3: 0.453 usec per loop

python2.5 -m timeit "len('abc')"
1000000 loops, best of 3: 0.292 usec per loop

Common code paths are already highly optimized. Don't try to be clever
unless you really understand what happens inside the interpreter. The
__internal__ methods are called magic methods for a reason. ;)

Christian



From ptmcg at austin.rr.com  Mon May 19 09:18:53 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:18:53 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
	<67828af6-82a6-4c5d-adc0-d5f8d4b083b0@x41g2000hsb.googlegroups.com>
Message-ID: <3e70e415-a276-4f91-b9d1-95dfc2f242ea@59g2000hsb.googlegroups.com>

On May 19, 8:09?am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 19, 4:54?am, kuratk... at kuratkull.com wrote:> Hello,
>
> <snip code example scraping a QOTD fromwww.mcgyver.com>
>
>
>
> > print out
> > **************
>
> Since you have no control over spacing and line breaks in the input,
> you can reformat using the textwrap module. ?First replace all "\n"s
> with " ", then use re.sub to replace multiple spaces with a single
> space, then call textwrap.fill to reformat the line into lines up to
> 'n' characters long (I chose 50 in the sample below, but you can
> choose any line length you like).
>
> out = match.findall(html)
> out = out[0].replace("\n"," ")
> out = re.sub("\s+"," ",out)
>
> print textwrap.fill(out,50)
>
> -- Paul

One last try - .replace("\n"," ") is unnecessary, textwrap.fill takes
care of removing extra newlines already.

out = match.findall(html)
out = out[0]
out = re.sub("\s+"," ",out)

print textwrap.fill(out,50)

-- Paul


From gherron at islandtraining.com  Mon May 19 04:29:51 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 19 May 2008 01:29:51 -0700
Subject: arrays
In-Reply-To: <BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>
	<BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
Message-ID: <48313A7F.4050909@islandtraining.com>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
>  
> How do I make it so that I now have:
>  
> starting with first element (a[0])
> new_arr[0] = 'r'
> new_arr[1] = 'g'
> new_arr[2] = 'b'
> new_arr[3] = 'a'
> new_arr[4] = 'r'
> .....
>  
> continuing "through" a[1] with the same new_arr
> new_arr[N] = 'r'
> new_arr[N+1] = 'g'
> ....
>  
> -M
>
> ------------------------------------------------------------------------
> Give to a good cause with every e-mail. Join the i?m Initiative from 
> Microsoft. 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?souce=EML_WL_%20GoodCause> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
2 questions:

1.  Why have you flooded this news group with three identical copies of 
a question under three different subject?  This is a (mild) bit of abuse 
of the newsgroup.  One copy with a reasonable subject line is enough.

2.  Haven't I answered this question for you often enough already?   Was 
my answer not clear enough, or has the problem again changed slightly 
enough to require a new answer?   Having solved 3 or 4 versions of this 
problem for you already, I'm wondering why I'm seeing it posed yet one 
more time.   If this is *exactly* the same problem I solved once already 
(and I believe it is), why are we seeing it again, and if it is not the 
*exact* same problem,  why are we seeing so many similar version of 
it?   It's starting to feel like a slight abuse of my time to see this 
problem on the newsgroup again.  


Gary Herron



From rhh2109 at columbia.edu  Fri May  9 07:21:39 2008
From: rhh2109 at columbia.edu (Roy H. Han)
Date: Fri, 9 May 2008 07:21:39 -0400
Subject: Pythonwin
In-Reply-To: <aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>
Message-ID: <6a5569ec0805090421x34a74f22tc2c16758a93ff53a@mail.gmail.com>

Hi Clive,

For ArcGIS, I use plain old VIM, IPython and IDLE.

If you really want PythonWin, then you can download Mark Hammond's Python
for Windows extensions: http://sourceforge.net/projects/pywin32/

Note also that with the pywin32 extensions, you can also use Python 2.5 to
access ArcGIS using

from win32com.client import Dispatch
arcgis = Dispatch('esriGeoprocessing.GpDispatch')

If you just need to access shapefiles, there is shapelib:
http://shapelib.maptools.org/
To make shapelib bindings for Python 2.5
1. Download *shapelib_1_2_10.zip *from http://dl.maptools.org/dl/shapelib/
2. Download *pyshapelib-0.3.zip* from
ftp://intevation.de/users/bh/pyshapelib
3. Extract *pyshapelib-0.3.zip*
4. Extract *shapelib_1_2_10.zip* to the folder containing pyshapelib.
Rename the extracted folder as *shapelib*
5. From the pyshapelib directory, run python setup.py build.  The script
looks in its parent folder for the shapelib folder.
5. From the pyshapelib directory, python setup.py install

Hope that helps,
Roy
**
On Fri, May 9, 2008 at 6:46 AM, Niklas Norrthon <niklas.norrthon at hotmail.com>
wrote:

> On 9 Maj, 12:30, Clive_S <clives... at yahoo.co.uk> wrote:
> > Hi
> >
> > I am trying to use Python with ArcGIS.
> >
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> >
> > How do you install or launch pythonwin??
>
> There is a distribution of PythonWin bundled with the
> ArcGIS Desktop installation media, but it is not
> installed by the ArcGIS installer.
>
> You have three options:
> 1. Install it manually from the ArcGIS installation
> media.
> 2. Find it on the web (google for it), download and
> install.
> 3. (My recommendation) Don't bother. IDLE is pretty
> good. Emacs even better (unless you hate emacs).
>
> --
> Niklas Norrthon
> ESRI S-GROUP
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From alokkat at gmail.com  Wed May 28 08:41:06 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 08:41:06 -0400
Subject: Struct usages in Python
In-Reply-To: <ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>
Message-ID: <e3a81e680805280541m4b6bd1d0n49e91eeb766f6854@mail.gmail.com>

while traversing I get out of index error as mentioned below.


class EventTimeFilter:

   def __init__(self):
*           self.event = [Event()]*


   def populateScheduleData(self):

       self.doc = libxml2.parseFile(self.FILENAME)
       for eachcamera in
self.doc.xpathEval('SetDeviceConfiguration/Camera/.'):
            cameraIndex = eachcamera.get_properties()
            #print cameraIndex
            index = int(cameraIndex.content,10)
            print index

            xpathEventType = 'SetDeviceConfiguration/Camera[@cameraIndex=' +
cameraIndex.content +']/Filter/Event'
            for searchResults in self.doc.xpathEval(xpathEventType):
             eventType = searchResults.get_properties()

            * self.event[index-1].cameraEventType = eventType.content #
Error*

*#Error as below*
    self.event[index-1].cameraEventType = eventType.content
IndexError: list index out of range

Any guidance why I am getting *list index out of range error*?
index value runs from 1 to 4.
Thanks for all your help.
Alok

On Wed, May 28, 2008 at 1:09 AM, Casey McGinty <casey.mcginty at gmail.com>
wrote:

>
>            self.event[] = Event()   *# Seems this is not allowed ?? *
>>
>
> self.event = [Event()]
>
> - Casey
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From mnikhil at gmail.com  Fri May 23 14:13:34 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 23 May 2008 23:43:34 +0530
Subject: Using MySQLdb to select into the local file
References: <g14gk0$ntt$1@registered.motzarella.org>
	<4835cf41$0$34536$742ec2ed@news.sonic.net>
Message-ID: <g171ge$t9p$1@registered.motzarella.org>

John Nagle wrote:
> Nikhil wrote:
>> I am using the MySQLdb python module. I have a table named 'testing' 
>> with few columns, under the 'test' database, what is hosted on a 
>> remote mysql server.
>>
>> I want to run the following query to get a comma-separated information 
>> from the table
>>
>>
>> LOCK TABLES foo READ;
>> SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
>>   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
>>   LINES TERMINATED BY '\n'
>>   FROM 'testing'
>> UNLOCK TABLES;
>>
>> ..the query is running fine, but what I am noticing is /tmp/result.txt 
>> is getting created locally on a mysqld running machine but not on the 
>> client(python program) using the MySQLdb module.
> 
>     Unfortunately, while there is LOAD DATA LOCAL INFILE, which
> reads a file on the client, there is no SELECT INTO LOCAL OUTFILE.
> 
>     Actually, you probably want to turn off the FILE privilege
> for your MySQL.  That blocks LOAD DATA INFILE and SELECT INTO
> OUTFILE, generally considered a good idea because those commands can
> access arbitrary file names.
> 
>     Also, if you're still using LOCK TABLES and UNLOCK TABLES,
> read up on InnoDB and transactions.
> 
>     Typically, you do something like this:
> 
> import MySQLdb
> import csv
> 
> def writedb(db, filename) :
>     try :
>         outcsv = csv.writer(filename)    # output object for CSV
>         cursor = db.cursor()                                    
> cursor.execute("SELECT a,b,a+b FROM testing")   
>         while True :            # do all rows
>             row = cursor.fetchone()    # get a tuple for one row
>             if row is None :    # if end of rows
>                 break        # done
>             outcsv.writerow(row)    # write row in CSV format
>         db.commit()            # release locks
> 
>     except MySQLdb.OperationalError, message:
>         print "Database trouble: ", message # handle any db problems
>         raise                # reraise exception
> 
> 
> hostname="???"                    # fill in appropriately
> user="???"
> password="???"
> db = MySQLdb.connect(host=hostname,         # open database
>     user=username, passwd=password, db=databasename)
> 
> writedb(db, '/tmp/result.txt')            # do it
> 
> ===============
> 
>   Note that this is ASCII-oriented; if you Unicode, you need
> extra params to "connect".  Also, the CSV module doesn't do
> Unicode well as yet.  Make sure the "outcsv" object
> goes out of scope before you try to read the file, so the
> file gets flushed and closed.
> 
>                     John Nagle
Thanks John. That was a useful tip.

Regards,
Nikhil


From nick at craig-wood.com  Fri May 23 05:30:08 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:08 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
	<mailman.1493.1211510178.12834.python-list@python.org>
	<grqZj.109$iM3.7@flpi150.ffdc.sbc.com>
Message-ID: <slrng3d1k9.3re.nick@irishsea.home.craig-wood.com>

I V <ivlenin at gmail.com> wrote:
>  On Thu, 22 May 2008 19:35:50 -0700, Charles Hixson wrote:
> > Although when comparing Candygram with Erlang it's worth noting that
> > Candygram is bound to one processor, where Erlang can operate on
> > multiple processors. (I'd been planning on using Candygram for a project
> > at one point, but this made it unusable.)
> 
>  Really? The FAQ says it uses operating system threads, which I would have 
>  thought would mean it runs on multiple processors (modulo, I suppose, the 
>  issues with the GIL).

I think candygram is crying out to be married with stackless &or PyPy.
It also needs an IPC channel to compete with Erlang directly.

If you are interested in stackless python vs Erlang then take a look
at this...

  http://muharem.wordpress.com/2007/07/31/erlang-vs-stackless-python-a-first-benchmark/

...and read the discussion too!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From upton at virginia.edu  Mon May 26 17:26:46 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 17:26:46 -0400
Subject: python raycaster, pycaster, where?
In-Reply-To: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805261426k589a4643m3970aaf27c2659b4@mail.gmail.com>

On Mon, May 26, 2008 at 4:52 PM,  <notnorwegian at yahoo.se> wrote:
> i tried googling this thing but couldnt find it. i cant find it in
> pyagme either.
>

Really?

http://www.google.com/search?q=pycaster

The first link has downloads for it.


From basti.wiesner at gmx.net  Mon May 26 13:32:12 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 19:32:12 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
Message-ID: <g1es85$r7u$03$1@news.t-online.com>

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Hash: SHA1

[ Ivan Illarionov <ivan.illarionov at gmail.com> ]

> On Mon, 26 May 2008 17:49:01 +0200, Sebastian 'lunar' Wiesner wrote:
> 
> [...]
>> Modern frameworks like Django or Grok require a somewhat great adaption,
>> since they strongly restrict the programmer's freedom.  I doubt, that
>> you would get Django or Grok working like your asp framework.
> 
> Actually, mordern frameworks (at least Djagno) does not "restrict the
> programmer's freedom", they only encourage clean design.

Can we agree on the fact, that Django _encourages clean design_ by
_restricting the programmers freedom to some degree_?  This comprise would
avoid an endless war about framework philosophy ;)  (and isn't so far from
the truth, btw)

> It's perfectly possible to write Django app with only one view and url
> pattern that redirects everything to different template engine like
> Cheetah or Mako and all the logic could be put inside those templates.

Absolutely,  but that's not what Django is about.  If you don't follow
Django's conventions and don't make use of Djangos facilities like its ORM
or its admin interface, Django just doesn't make sense anymore.

An application such as you outlined would depend on a big, heavy framework
to do a task, that could easily be done with plain WSGI or a WSGI wrapper
like Werkzeug.
 
> But, IMHO, writing PHP-style Python webapp is silly.

I completely agree here, but that's not, what the OP asked for ;)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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AC8An1+sUvbyWiIu9mBixQ9ME0j1Ts+j
=6lQT
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From inhahe at gmail.com  Sun May 18 04:27:56 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 04:27:56 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
Message-ID: <GLRXj.7004$255.387@bignews8.bellsouth.net>

By the way, "state" as a meronym of "city" and "state" as it applies to 
programming (i.e. stasis) are two unrelated things.

>I'd start to discuss state property in appertanance to city >property.
>What are some properties of the state?




From python at rcn.com  Fri May 30 23:46:07 2008
From: python at rcn.com (Raymond Hettinger)
Date: Fri, 30 May 2008 20:46:07 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
	<g0gndb$3vt$03$1@news.t-online.com>
Message-ID: <8c937dcb-082f-4182-be44-429fec31a8b9@z24g2000prf.googlegroups.com>

On May 15, 12:06?am, Peter Otten <__pete... at web.de> wrote:
> According
> to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
> work:

In Py2.6 and after, you only need < and ==.  I replaced the LE tests
with LT to match list.sort() and bisect.bisect().  The == arises
because nlargest/nsmallest compare decorated tuples.  Tuple comparison
always starts with equality tests to find the first unequal element
and then switches back to testing whichever inequality test was
requested.

Raymond


From lists at cheimes.de  Thu May  1 13:55:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 19:55:21 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A0409.6040706@cheimes.de>

Torsten Bronger schrieb:
> Hall?chen!
> 
> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

Try "python setup.py register sdist upload"

Christian


From exarkun at divmod.com  Mon May  5 15:32:52 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 15:32:52 -0400
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <20080505193252.6859.1948998822.divmod.quotient.59157@ohm>

On Mon, 5 May 2008 11:11:19 -0700 (PDT), TkNeo <tarun.kap at gmail.com> wrote:
>On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>>
>> > Mike Driscoll wrote:
>> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
>> > >> I need to do SSL file transfer using python? Is there a library i can
>> > >> use ?
>>
>> > >http://sandbox.rulemaker.net/ngps/m2/
>>
>> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>>
>> > --
>> >   Heikki Toivonen
>>
>> Whoops...I just went with the first link Google gave me. The link I
>> gave doesn't mention that the project has moved. Looks like the one
>> you link to is the 9th link on my Google search using the terms:
>> "python m2crypto".
>>
>> Sorry if I spread misinformation though.
>>
>> Mike
>
>ok i have tried around a lot but no luck. I think M2Crypto is my best
>option except it requires a minimum of python 2.4 which i don't have.
>
>What i am trying to do is to do an FTP transfer that uses SSL
>(username, password authentication) and not a certificate file. The
>few example i have found of the Openssl module use a certificate for
>authentication unlike what i want to do.
>
>Anyone has any ideas ?

FWIW, though not as complete as an OpenSSL wrapper as M2Crypto, pyOpenSSL
works with Python 2.3.

As far as the details of the authentication that you are attempting go, it
sounds like you want to use ephemeral DH key exchange.  This is something
which is on my list to figure out. ;)

Jean-Paul


From george.sakkis at gmail.com  Sat May 17 04:06:12 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 17 May 2008 01:06:12 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <95294ce6-38a0-44cd-8b0f-2bce0642886d@27g2000hsf.googlegroups.com>

On May 16, 5:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time. ?If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated. ?For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated). ?Roughly:
>
> for pid in procs_dict:
> ? if procs_dict[pid].poll() != None
> ? ?# do the counter updates
> ? ?del procs_dict[pid]

Since you don't look up processes by pid, you don't need a dictionary
here. A cleaner and efficient solution is use a deque to pop processes
from one end and push them to the other if still alive, something like
this:

from collections import deque

processes = deque()
# start processes and put them in the queue

while processes:
    for i in xrange(len(processes)):
        p = processes.pop()
        if p.poll() is None: # not finished yet
            processes.append_left(p)
    time.sleep(5)


HTH,
George


From exhuma at gmail.com  Wed May 21 08:27:17 2008
From: exhuma at gmail.com (Michel Albert)
Date: Wed, 21 May 2008 05:27:17 -0700 (PDT)
Subject: qrcode in python?
Message-ID: <6498df89-1298-445b-9674-f4d92e0cd298@x41g2000hsb.googlegroups.com>

I am planning to write a python-module for python as I haven't found
anything on the tubes so far. If anyone has any interesting insight on
this topic, replies are welcome! ;)

Q: What is QR-Code?
A: http://www.denso-wave.com/qrcode/qrstandard-e.html

So far (as of May 21st 2008):

Google  (1 sensible hit): http://mail.python.org/pipermail/python-list/2006-May/385258.html
The Cheese shop (nothing): http://pypi.python.org/pypi?%3Aaction=search&term=qrcode&submit=search
Sourceforge (1 hit - no files/code): http://sourceforge.net/projects/qrcode/

I was planning to make use of qr-code in a web-application which is
written in python. So far I was not yet lucky to find any existing
module. I just contacted the project lead of http://sourceforge.net/projects/qrcode/
on this topic as well. Let's see what he replies.

So..... any pointers/ideas ?


From KyleMcG at gmail.com  Wed May  7 22:14:35 2008
From: KyleMcG at gmail.com (Kyle McGivney)
Date: Wed, 7 May 2008 19:14:35 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <e04ba51f-30a0-44fa-aade-c2fb6c99f944@26g2000hsk.googlegroups.com>

> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
> lisp's keywords ?let?, is based on the English word ?let?. That word
> is one of the English word with multitudes of meanings. If you look up
> its definition in a dictionary, you'll see that it means many
> disparate things. One of them, as in ?let's go?, has the meaning of
> ?permit; to cause to; allow?. This meaning is rather vague from a
> mathematical sense. Mathematica's choice of Module, Block, is based on
> the idea that it builds a self-contained segment of code. (however,
> the choice of Block as keyword here isn't perfect, since the word also
> has meanings like ?obstruct; jam?)

If the purpose of let is to introduce one or more variable bindings,
then I don't see how changing to block or module would improve
anything. I've always found it fairly intuitive to parse (let ((x
5)) ...) to "let x be five". Additionally, replacing let with the
synonyms you provided would approximately yield "permit x to be five"
or "allow x to be five". In my mind you have constructed an argument
in favor of let here (obviously it's better than block, because
nobody's going to come along and be confused about whether let will
"obstruct" or "jam" them :)

There are many easy targets to poke at in the CL spec. let isn't one
of those.


From alex.m.gusarov at gmail.com  Mon May 26 11:37:04 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 22:37:04 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <ac6dcb3d0805260837y25261922g2ed17432a942f1be@mail.gmail.com>

Hello, I have strong .NET background with C# and want to do some familiar
things from it with Python, but don't know how. For example, I created form
in qt designer with QCalendarWidget, translated it into Python module and
want to overload virtual method paintCell of QCalendarWidget. In C# I can
write following (abstract) code:

this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);

void myPaintCellHandler(object sender, PaintEventArgs e) {
    // some work here
}

I can't find how I can do similar thing in Python without inheriting
QCalendarWidget and overloading this method in inherited class (it's long
and I must create additional class). So, I need to run my code whenever
paintCell is called by Qt internals and I have no enough experience with
Python for it. Please, give me some advice, I know Python must be good
enough to do such things.

--
Best regards, Alex Gusarov
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From clyfish at gmail.com  Fri May  9 02:39:48 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Thu, 8 May 2008 23:39:48 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com> 
	<8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com> 
	<mailman.743.1210239613.12834.python-list@python.org>
Message-ID: <122616fb-29a1-4532-9e16-845c596b56ad@z24g2000prf.googlegroups.com>

On 5?8?, ??5?39?, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Wed, 07 May 2008 23:29:58 -0300, <clyf... at gmail.com> escribi?:
>
>
>
> > On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
> > wrote:
> >> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>
> >> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> >> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> >> > print p2.stdout.read()
>
> >> > It doesn't work.
> >> > Because subprocess.Popen execute "find" like this.
>
> >> > C:\>find \"445\"
>
> >> > It adds a '\' before each '"'.
> >> > How to remove the '\'?
> >> > Thank you.
>
> >> cannot help with the backslashes but try findstr instead of find
>
> > Thank you.
> > findstr doesn't need quotes, so it works.
>
> Build the command line yourself -instead of using a list of arguments-. Popen doesn't play with the quotes in that case:
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE) # using list
> p2 = Popen('find "445"', stdin = p1.stdout, stdout = PIPE) # using str
> print p2.communicate()[0]
>
> --
> Gabriel Genellina

Thanks very much.
You solved my problem.


From bellman at lysator.liu.se  Tue May 20 10:21:05 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 14:21:05 +0000 (UTC)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
Message-ID: <g0umoh$i0s$1@news.lysator.liu.se>

"John Salerno" <johnjsal at NOSPAMgmail.com> writes:

> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
> news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
>> the above code is pretty much of a no-no because it has quadratic runtime
>> behavior.

> What's that mean, exactly?

It means that running time will increase with the square of the
problem size.  2.000.000 items will take 4 times as long as
1.000.000 items, and 5.000.000 items will take 25 times as long
as 1.000.000 items.

> Are you referring to both examples, or just the
> second one?

The problem is that the lookup you did to see if an item had
already been seen, is done by a linear search of a list.  The
search time is linearly proportional to the number of items on
the list 'new', but since the number of times you do that search
increases with the length of the input, the total runtime for
your function increases even more.

This thus applies to both your examples, since they really do the
same thing.

However, it actually depends on what your input is.  For the
runtime to increase with the square of the input length in your
function, the number of *unique* items on the input must be a
constant fraction of the input length.  By that I mean that, for
example, 5% of the input items are unique, so that if your input
is 100 items, then the list 'new' will be 5 items at the end of
the function, and if your input is 5.000.000 items, then 'new'
will become 250.000 items long.

This might not be the case in your use.  If you for example know
that the input only consists of integers between 0 and 10, then
'new' will never become longer than 11 items, regardless of
whether the input is 20 or 20.000.000.000 items.  The runtime of
your function then suddenly becomes linear in the problem size
instead of quadratic.

Even so, maintaining the set of already seen items as a set is
likely to be faster than keeping them as a list, even for a
fairly small number of unique items.

One small exception from this, though.  If only maintaining one
data structure (the ordered list 'new' in your code) makes your
working set fit within the processor cache, while maintaining two
data structures (a list for keeping the order, and a set for
searching) will make it *not* fit within the cache, then it
*might* actually be faster to just maintain the list.  Unlikely,
but not entirely impossible, and just a small change of the
problem size can change the balance again.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"What sane person could live in this world   !  bellman @ lysator.liu.se
 and not be crazy?"  -- Ursula K LeGuin      !  Make Love -- Nicht Wahr!


From pistacchio at gmail.com  Wed May  7 09:27:36 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 15:27:36 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
Message-ID: <fvsaoa$g46$1@aioe.org>

Mike Driscoll ha scritto:
> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>> hi! i'm a php user and a python programmer. i'd love to use python for
>> my server side needs but i can't seem to find what i'm looking for. for
>> most of my php work i use mysql and tinyButStrong
>> (http://www.tinybutstrong.com) which is a very lightweight template
>> engine that offers powerful functionalities. you insert TBS tags in web
>> pages like:
>>
>> <div align="center" class="title-page"> [var.x] </div>
>>
>> and it replaces [var.x] with the value of global variable x. it also
>> makes blocks (and nested blocks) easy to implement:
>>
>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>> [blk1;block=end] </p>
>>
>> in the previous code it cycles throu all the values of the array blk1.
>>
>> it does many more things, like htlm escaping, url and js encoding etc,
>> conditional displaying etc, but it is not more confusing that inserting
>> pieces of code into the HTML (aka: littering the code and kissing
>> goodbye to the code/presentation separation). it comes in the form of a
>> single file with a single class that you can easily include in the code
>> and go.
>>
>> now, i've searched the net and it seems full of python-based frameworks
>> for doing server side scripting and templating, but none that suits my
>> needs.
>>
>>     1. i like writing code and i like control. i mean, open up the
>> simplest text editor and write in it. i don't want something that is
>> command-line driven or that writes code for me like ">>>
>> makePagesFromThisDatabase()".
>>     2. i want something very lightweight. i don't want dozen of options,
>> pre-made blogging parts ecc. i just need a good non invasive template
>> engine and the basic functions for server side scripting, like session
>> managing, request parsing, functions to manipulate html code (encodings etc)
>>     3. i don't want to beg my hosting provider to install the libraries.
>> a simple include file should do the work.
>>     4. object oriented programming is not required (better: i prefer
>> plain old procedural programming).
>>
>> any help? thanks in advance
> 

hi, thanks for replaying

> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
> and Genshi in 2.x (I think) for templating purposes. There's also
> Cheetah, one of the more powerful Python templating engines out there.
> 

django is exacly the kind of giant i'm trying to avoid

> http://genshi.edgewall.org/

the first lines of the tutorial read:
"First, make sure you have CherryPy 3.0.x installed"
Now, cherrypy is something that is not properly "include a file and get 
going!"

> http://www.kid-templating.org/

kid seems to have a non-linear approach, but i may give it a try

> http://www.cheetahtemplate.org/

cheetah was something that i already considered using. have i to 
"install" it or can i just import it?

> http://turbogears.org/

same problem as with django!

> 
> Maybe those links will get you going.
> 
> Mike


From pavlovevidence at gmail.com  Wed May  7 03:26:04 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 00:26:04 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com>
Message-ID: <15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com>

On May 7, 2:39 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> vivai... at gmail.com (Ville M. Vainio) writes:
>
> > In practice, the probability of hijacking of source code by an evil
> > corporation is very low for most projects. And even when it did
> > happen, the evil corporation would likely submit patches.
>
> If they're going to submit patches then they shouldn't have any problem
> with the GPL.

Nonsense.  They could be more than willing to contribute their
patches, but aren't willing to accept the GPL's limitation to being
used only in open source packages.

LGPL?  No, there is probably no reason to have a serious problem with
that if you're going to submit patches, but GPL, yes.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Mon May 12 03:00:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 04:00:21 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> escribi?:

> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
>
>
> is there a better way than my solution? is mine ok?

Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.

(We used this question last year - some people gave a sensible answer in less than 5 minutes, but others did not even know how to start)

-- 
Gabriel Genellina



From gnewsg at gmail.com  Thu May 22 08:58:19 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Thu, 22 May 2008 05:58:19 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<g13fsc$onq$1$8300dec7@news.demon.co.uk>
Message-ID: <bc564641-859c-450c-8bd1-0dc63085cf16@56g2000hsm.googlegroups.com>

On 22 Mag, 11:54, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> After os.path.exists, you need to check it _is_ a
> file, and not a directory.
>
>
>
> Giampaolo Rodola' wrote:
> > On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
> >> what are the simple ways?
> >> I could think of os.open(), os.exec(touch file)
>
> >> are there any simpler methods?
>
> > Just use os.path.exists to check for file existence and open() as
> > replacement for touch.
>
> >>>> import os
> >>>> if not os.path.exists('file'):
> > ... ? ? open('file', 'w').close()
> > ...
>
> > --- Giampaolo
> >http://code.google.com/p/pyftpdlib/- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Yeah, I forgot. :\


--- Giampaolo
http://code.google.com/p/pyftpdlib


From bj_666 at gmx.net  Sun May 25 03:32:49 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 May 2008 07:32:49 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
Message-ID: <69sj10F34jb08U3@mid.uni-berlin.de>

On Sun, 25 May 2008 00:10:45 -0700, notnorwegian wrote:

> sets dont seem to be so good because there is no way to iterate them.

Err:

In [82]: for x in set(['a', 'b', 'c']):
   ....:     print x
   ....:
a
c
b

Ciao,
	Marc 'BlackJack' Rintsch


From inhahe at gmail.com  Sun May 18 07:37:37 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 07:37:37 -0400
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
Message-ID: <3xUXj.11305$hv2.9481@bignews5.bellsouth.net>


"Sanoski" <Joshuajruss at gmail.com> wrote in message 
news:1449c36e-10ce-42f4-bded-99d53a0a2569 at a1g2000hsb.googlegroups.com...
> I'm pretty new to programming. I've just been studying a few weeks off
> and on. I know a little, and I'm learning as I go. Programming is so
> much fun! I really wish I would have gotten into it years ago, but
> here's my question. I have a longterm project in mind, and I wont to
> know if it's feasible and how difficult it will be.
>
> There's an XML feed for my school that some other class designed. It's
> just a simple idea that lists all classes, room number, and the person
> with the highest GPA. The feed is set up like this. Each one of the
> following lines would also be a link to more information about the
> class, etc.
>
> Economics, Room 216, James Faker, 3.4
> Social Studies, Room 231, Brain Fictitious, 3.5
>
> etc, etc
>
> The student also has a picture reference that depicts his GPA based on
> the number. The picture is basically just a graph. I just want to
> write a program that uses the information on this feed.
>
> I want it to reach out to this XML feed, record each instance of the
> above format along with the picture reference of the highest GPA
> student, download it locally, and then be able to use that information
> in various was. I figured I'll start by counting each instance. For
> example, the above would be 2 instances.
>
> Eventually, I want it to be able to cross reference data you've
> already downloaded, and be able to compare GPA's, etc. It would have a
> GUI and everything too, but I am trying to keep it simple right now,
> and just build onto it as I learn.
>
> So lets just say this. How do you grab information from the web, in
> this case a feed, and then use that in calculations? How would you
> implement such a project? Would you save the information into a text
> file? Or would you use something else? Should I study up on SQLite?
> Maybe I should study classes. I'm just not sure. What would be the
> most effective technique?


People usually say BeautifulSoup for getting stuff from the web.  I think I 
tried it once and had some problem and gave up.  But since this is XML I 
think all you'd need is an xml.dom.minidom or xml.etree.ElementTree. i'm not 
sure which is easier.  see doc\python.chm in the Python directory to study 
up on those.  To grab the webpage to begin with you'd use urllib2.  That 
takes around one line of code.  I wouldn't save it to a text file, because 
they're not that good for random access.  Or storing images.  I'd save it in 
a database.  There are other database modules than SQLite, but SQLite is a 
good one, for simple projects like that where you're just going to be 
running one instance of the program at a time.  SQLite is fast and it's the 
only one that doesn't require a separate database engine to be installed and 
running.
Classes are just a way of organizing code (and a little more, but they don't 
have a lot to do with saving stuff to file).
I'm not clear on whether the GPA is available as text and an image, or just 
an image.  If it's just available as an image you're going to want to use 
PIL (Python Image Library).  Btw, use float() to convert a textual GPA to a 
number.
You'll have to learn some basics of the SQL language (that applies to any 
database).  Or maybe not with SQLObject or SQLAlchemy, but I don't know how 
easy those are to learn.  Or if you don't want to learn SQL you could use a 
text file with fixed-length fields and perhaps references to individual 
filenames that store the pictures, and I could tell you how to do that.  But 
a database is a lot more flexible, and you wouldn't need to learn much SQL 
for the same purposes.
Btw, I used SQLite version 2 before and it didn't allow me to return query 
results as dictionaries (i.e., indexable by field name), just lists of 
values, except by using some strange code I found somewhere.  But a list is 
also easy to use.  But if version 3 doesn't do it either and you want the 
code I have it.




From paul at boddie.org.uk  Tue May 20 17:17:47 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Tue, 20 May 2008 14:17:47 -0700 (PDT)
Subject: self.var hmm?
References: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
Message-ID: <e754a463-04ce-4c2f-85a1-21027b6bee43@s33g2000pri.googlegroups.com>

On 20 Mai, 22:58, notnorweg... at yahoo.se wrote:
> class TaskGroup:
>     def __init__(self):
>         self.group = []
>
>     def addTask(self, task):
>         self.group.append(task)
>
> is this wrong? i have a program thats too big to post but should i
> just do group.append in addTask?

No, you have to do self.group.append, since group isn't a local
variable in the addTask method, and I doubt that you'd want addTask to
make changes to any global variable called group, which is what might
happen otherwise - that could be a source of potential problems, so
you need to be aware of that!

> reason is when later doing TaskGroup.group i get None

TaskGroup.group would be referencing a class attribute called group,
which is "shared" by all TaskGroup instances (and the TaskGroup class
itself, of course). What you need to do is to access the instance
attribute called group via each instance, and the self.group notation
does exactly that: self is the reference to a particular instance (in
the addTask method, it's the instance used to call the addTask
method).

You might wonder why Python doesn't know inside a method that group is
a reference to an instance attribute of that name. The reason,
somewhat simplified, is that Python only has assignments to populate
namespaces (such as the contents of an instance), whereas languages
which employ declarations (such as Java) would have you list the
instance attributes up front. In these other languages, the compiler/
interpreter would know that you're executing a method belonging to an
instance of a particular class, and it would also know what names to
expect as references to class and instance attributes.

Anyway, I hope this makes more sense now than it did a few moments
ago. :-)

Paul


From pistacchio at gmail.com  Mon May 12 04:10:00 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 01:10:00 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>
Message-ID: <a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>

On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> > hi to all!
> > can i load a module passing to it, automatically and as default, all
> > the caller's global variables to act as module's global variables?
> > thanks
>
> module = __import__('module', globals=globals())
>
> I think that's what you're looking for.
>
> - alex23


hmm, well, maybe yes.. should i ovveride the standard import function
of the module?
say that the module is called "pycatrix", would adding this to the
module solve the problem?

def __import__('pycatrix', globals=globals()):



From gherron at islandtraining.com  Tue May 27 13:31:40 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 10:31:40 -0700
Subject: New chairman
In-Reply-To: <g1hg3r$orp$1@ger.gmane.org>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>	<mailman.1648.1211899834.12834.python-list@python.org>	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<g1hg3r$orp$1@ger.gmane.org>
Message-ID: <483C457C.4060006@islandtraining.com>

Max M wrote:
> Sverker Nilsson skrev:
>> I was talking about Guido van Rossum
>>
>> The one who decides, so far when people agree
>
> I have been using Python since the nineties. I cannot remember when I 
> have had to rewrite old code because of changes in the language.
>
> At the same time I have been feeling as if I was sitting in a time 
> machine watching other languages whoosh by at breakneck speed.
>
> Entire technologies have been developed to make programming as 
> practical and easy as it has been in Python the entire time.
>
> So I find it hard to see exactly what it is that Guido is doing wrong?
>
Please don't feed the trolls.   
(http://en.wikipedia.org/wiki/Internet_troll#Troll_FAQs)




From johnjsal at NOSPAMgmail.com  Mon May 19 23:54:24 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:54:24 -0400
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
	<3b0ba35b-c2b9-4ab2-8e7c-fecebce465c2@d77g2000hsb.googlegroups.com>
Message-ID: <20080519235424.8addcf12.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 23:08:11 -0700 (PDT)
s0suk3 at gmail.com wrote:

> Every now and then, however, I do build some interface (mostly GUI),
> such as a monitor, notification mechanism, etc. But I never feel like
> I'm losing focus on the actual problem; maybe because I develop the
> core program first and the think about a possible and optional
> interface. Maybe a good suggestion is to put the GUI stuff on another
> module or package, and make interface functions or methods to handle
> the needed GUI controls, so that the GUI stuff shows up as little as
> possible in the core part of the program.

I certainly don't *not* like GUI programming. In fact, learning wxPython was really fun and interesting and I enjoy GUI stuff. And after learning about XRC (putting the GUI component in a separate XML file, away from the program logic) that helped me learn how to keep things separate as well. I even wrote a tutorial on how to use XRC with wxPython! :)


From castironpi at gmail.com  Thu May 15 19:56:42 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:56:42 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
	<482C7D93.2080809@behnel.de>
Message-ID: <67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>

On May 15, 1:14?pm, Stefan Behnel <stefan... at behnel.de> wrote:
> castiro... at gmail.com wrote:
> > What do we render?
>
> Sur.
>
> Stefan

I'm pretty sure 'inputs' come from the real world.  I guess the fear
would be my hands aren't happy.  Concerns include age fitity, a
propriety, and making up words.  Blah?


From nick at craig-wood.com  Tue May  6 17:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 06 May 2008 16:30:03 -0500
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr>
	<mailman.635.1210062200.12834.python-list@python.org>
Message-ID: <slrng21gq2.g1h.nick@irishsea.home.craig-wood.com>

Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>  As such 2.6 & 3.0 are also cooking, but from what I see on the mailing
>  list, some of the features are a bit controversial. So if I start with
>  2.5 now, unless there are some break-thru preformance gains, or
>  annoying defects fixed, I'd stick to it. If I can do something
>  "well-enough" with 2.5, I'd not refactor for 2.6, for quite some
>  fore-seeable future.

I started programming with python at version 2.0 so I've seen it
evolve over the years.

In case you are interested here are some links to what has changed
from the different versions over the years.

 2.0: http://www.amk.ca/python/2.0/
 2.1: http://www.amk.ca/python/2.1/
 2.2: http://www.python.org/doc/2.2.3/whatsnew/
 2.3: http://www.python.org/doc/2.3/whatsnew/
 2.4: http://www.python.org/doc/2.4.3/whatsnew/whatsnew24.html
 2.5: http://docs.python.org/whatsnew/whatsnew25.html
 2.5: http://docs.python.org/dev/whatsnew/2.6.html

I personally wouldn't like to use older than 2.2 any more.  I find new
style classes, iterators and generators to be invaluable.

Features I like from 2.3's are enumerate, csv and datetime modules.

And from 2.4 I like the subprocess module (though it runs on 2.3 just
fine too - it just isn't included).  I have occasionally used the
decorator syntax, but since it is syntactic sugar anyway it isn't
absolutely necessary.

In 2.5 has ctypes which is great though it is available as a 3rd party
module for 2.3 and 2.4.  As is sqlite3.

So in my opinion the real difference between the 2.2, 2.3, 2.4 and 2.5
are the built in modules.  The actual language changes are very minor.

If you write your code for 2.5 which is probably a good idea, you'll
have no problem backporting it to 2.4, 2.3 or even 2.2 should that be
necessary.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gherron at islandtraining.com  Wed May  7 15:41:17 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 07 May 2008 12:41:17 -0700
Subject: Idea for P3K
In-Reply-To: <4821fea4$0$880$ba4acef3@news.orange.fr>
References: <4821d418$0$932$ba4acef3@news.orange.fr>	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <482205DD.90506@islandtraining.com>

M?ta-MCI (MVP) wrote:
> Hi!
>
>> I don't often feel like using this word
>
> Look at languages like OCAML or F #
>
> @-salutations
Well of course, we're all well aware of other languages that allow 
variables to be bound in the middle of an expression.  It's just that 
Python was purposely created without that (mis)feature because it's so 
unclear, and easy to abuse.  Most of us in the community support that 
point of view and would fight the introduction of such a feature into 
Python.

Gary Herron




From martin at v.loewis.de  Sun May 25 11:01:33 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 17:01:33 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <4ob*BLLds@news.chiark.greenend.org.uk>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
	<4ob*BLLds@news.chiark.greenend.org.uk>
Message-ID: <48397F4D.8040009@v.loewis.de>

>>> I guess, Apache does some kind of memory caching for files, which are often
>>> requested and small enough to fit into the system memory.  May be, that's
>>> what the OP is referring to ...
> 
>> I'm not aware of that, and I even more seriously doubt it. Because 
>> caching is a complicated, domain-dependend subject that would 
>> *immediately* cry for configuration - e.g. caching strategies and such.
> 
> This is available in current apache with mod_file_cache (for an
> explicitly configured list of files). I think the circumstances where
> you'd want to use it are quite rare.

Interestingly enough, this *doesn't* do memory caching for files.
Instead, it either keeps the file handle open, so you can seek to the
beginning of the file on the next request (avoiding the directory
lookup), or you can mmap the file. However, even if you mmap the file,
it is still the operating system's choice whether or not to cache the
file contents in memory.

Regards,
Martin


From paul at boddie.org.uk  Mon May  5 18:47:32 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 5 May 2008 15:47:32 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <803a75aa-9de6-45e5-bb0a-a2512f8bdd32@m36g2000hse.googlegroups.com>

On 5 Mai, 23:57, vivai... at gmail.com (Ville M. Vainio) wrote:
> Paul Boddie <p... at boddie.org.uk> writes:
> > Anyway, I'm just confirming that I'm clearly not one of the "many"
> > described above. A lot of my own work is licensed under the GPL or
>
> I guess it's safe to assume that you are not opposed to using code
> based on more liberal license, right? :-)

As long as it's a GPL-compatible licence. ;-)

> My point is: GPL is a reason to reject a tool for some, but MIT/BSD
> never is. Ultimately, of course, it's up to the preferences of the
> author but if the idea is to maximize the popularity, GPL is a worse
> bet.

I know you were talking about small tools, but since we're being
jocular, I still can't resist the obligatory "tell it to Linus
Torvalds" remark. :-)

Paul

P.S. I've actually released at least one work derived from a
permissively licensed work under the LGPL (and I did ask the original
author if he had any problems with that, out of politeness), mostly
because I didn't object to people building applications under a wider
range of licences, but I did want end-users to get the benefit of the
library source code, including any modifications.


From larry.bates at websafe.com`  Thu May 29 21:27:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 29 May 2008 20:27:35 -0500
Subject: Help needed in choosing an algorithm for Cryptographic services.
In-Reply-To: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
Message-ID: <CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>

abhishek wrote:
> Hi group, recently my employer asked me too implement encryption/
> decryption for secure data transfer over internet. Problem is that the
> client application is written using C# and the webserver where i need
> to store the information is developed using python.
> 
> My situation of dilemma is which cryptographic method suits me best
> for this purpose.
> 
> Help/Suggestions are urgently required
> 
> Thank you ,
> Abhishek

Languages don't have anything to do with "what is best method".  It depends
on your application requirements.  If all you want is secure data "transfer"
just use SSL to encrypt the information while being transmitted.  If you wish
to have the data "stored encrypted" look into PGP.

-Larry


From deets at nospam.web.de  Wed May 21 14:52:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 20:52:03 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <69j9b6F33ckopU1@mid.uni-berlin.de>

Mark Dickinson schrieb:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
> 
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> a = 1e16-2.
>>>> a
> 9999999999999998.0
>>>> a+0.999     # gives expected result
> 9999999999999998.0
>>>> a+0.9999   # doesn't round correctly.
> 10000000000000000.0
> 
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?

It is working under OSX:

(TG1044)mac-dir:~/projects/artnology/Van_Abbe_RMS/Van-Abbe-RMS deets$ python
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>> a = 1e16-2.
 >>> a
9999999999999998.0
 >>> a+0.9999
9999999999999998.0
 >>>

But under linux, I get the same behavior:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>> a = 1e16-2.
 >>> a+0.9999
10000000000000000.0
 >>>


So - seems to me it's a linux-thing. I don't know enough about 
IEEE-floats to make any assumptions on the reasons for that.

Diez


From johnjsal at NOSPAMgmail.com  Mon May 19 23:48:03 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:48:03 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <20080519234803.5734b65f.johnjsal@NOSPAMgmail.com>

On Mon, 19 May 2008 20:20:28 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> To whit: you pointed out the awkwardness in Python of having to
> declare a for-loop variable when you only wanted to loop a specific
> number of times and didn't need the variable.

Well, I wasn't so much trying to point out an awkwardness as I was asking if anyone really *found* it awkward. And of course, my question also raises the question of whether or not it's good programming to simply want to do something a certain number of times. I suppose that situation may come up, but I wonder if it can be implemented in a more significant way than simply doing something X number of times.


From matt at tplus1.com  Mon May 12 12:10:21 2008
From: matt at tplus1.com (Matthew Wilson)
Date: Mon, 12 May 2008 16:10:21 GMT
Subject: In metaclass, when to use __new__ vs. __init__?
Message-ID: <slrng2gqvd.h3o.matt@sprout.tplus1.com>

I have been experimenting with metaclasses lately.  It seems possible to
define a metaclass by either subclassing type and then either redefining
__init__ or __new__. 

Here's the signature for __init__:

    def __init__(cls, name, bases, d):

and here's __new__:

    def __new__(meta, classname, bases, d):

Every metaclass I have found monkeys with d, which is available in both
methods.  So when is it better to use one vs the other?

Thanks for the help.

Matt

--
Programming, life in Cleveland, growing vegetables, other stuff.
http://blog.tplus1.com


From gagsl-py2 at yahoo.com.ar  Mon May 19 09:21:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 10:21:56 -0300
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
Message-ID: <op.ubekqu2ox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 19 May 2008 06:59:22 -0300, sandeep <shiningsandy at gmail.com> escribi?:

> the py code that i have written is here.when i run this code i wont
> get any errors it just works fine for me.but when i created the exe i
> start getting an error in my 'getMailContent' function. The error
> description is
>
> TypeError:unsupported operand type(s) for :- 'instance' and 'int'
>
> i dont know why i am start getting this error when i run it through
> the exe.

By example, your code uses os.getcwd() - so it depends on the current dir. Try running it from a different directory. Don't focus too much on the ".exe" vs ".py" difference: it might not be relevant, the error may reside elsewhere.

Please post the complete exception message *and* traceback. Don't retype it; copy and paste the message from the console. Your message above doesn't appear to be correctly typed, it says `:-` but Python would print `-:` and I don't see any `-` operation in your code that could fail in that way.

Also, don't do this:

>     try:
>         mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
>     except BaseException:
>         print BaseException

because you're completely hiding important information about *what* happened.

-- 
Gabriel Genellina



From jon at ffconsultancy.com  Thu May  1 12:50:32 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 01 May 2008 17:50:32 +0100
Subject: pop langs website ranking
References: <41fbaf27-a80b-402b-b406-c048a65a8643@b64g2000hsa.googlegroups.com>
	<2819d214-1208-4552-9b59-122e980e01d4@t12g2000prg.googlegroups.com>
Message-ID: <x6SdnUwlzLGga4TVRVnyhQA@plusnet>

xahlee at gmail.com wrote:
> Alexa's data is more reliable than quantcast.

Alexa claim to have accurate data on lots of sites but I just tried to
correlate their data with the exact data on our web server and the
discrepancies are huge. For example, combining our number of absolute
visitors with their measure of "reach" for our site indicates that there
are 58 billion internet users.

So their data are not even order-of-magnitude accurate. The only web analyst
I ever met was an astrophysicist so this does not really surprise me. ;-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From manthra.mohan at gmail.com  Thu May  1 15:06:07 2008
From: manthra.mohan at gmail.com (Krishna)
Date: Thu, 1 May 2008 12:06:07 -0700 (PDT)
Subject: data manipulation
Message-ID: <083cef9c-6bfe-4a1f-afc0-7384c043dc6d@u12g2000prd.googlegroups.com>

I have a script that reads an excel file and and do manipulations on
it. But, now, I have a text file that needs the same manipulation. I
tried the same script, but it will not work, when I use command such
as: workbook = xlrd.open_workbook('C:/trial.txt'), its giving me
errors saying "expected BOF record". I was wondering how to work
around this. Do I have to do some format conversion to accomplish this
or am I missing something

Thanks
Krishna


From Caseyweb at gmail.com  Fri May  9 19:45:09 2008
From: Caseyweb at gmail.com (Casey)
Date: Fri, 9 May 2008 16:45:09 -0700 (PDT)
Subject: Problem with help() in python/ipython interpreters
Message-ID: <62818f52-025a-48b1-b451-70abae1e6580@a23g2000hsc.googlegroups.com>

I'm running python 2.5.2 on WinXP.  I've always used a GUI for
interactive development, but I wanted to try out ipython which better
supports matplotlib in this mode.  Unfortunately, whenever I try to
use help() I get the following error:

(Sys) The system cannot find the file specified.
 "C:\documents"

It turns out that the regular (python.exe) interpreter has the same
problem.  I have the HTML docs installed, my PYTHONDOCS environment
variable points to the HTML directory, and I actually uninstalled and
reinstalled every library I use from scratch to make sure it wasn't
some random config issue.

The error message leads me to believe that the help() function is
trying to access something in my windows user directory structure (C:
\Documents and Settings\<username>\...) and is having problems with
the embedded space.  The really strange thing is that my python
directory is rooted at c:\python25 including my html docs. I know that
ipython does by default create a profile directory in %HOME%\_ipython
but that doesn't seem to be a problem and wouldn't impact the default
python.exe interpreter.

Any ideas?


From dannywebster at googlemail.com  Tue May 13 07:14:16 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 04:14:16 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1043.1210676114.12834.python-list@python.org>
Message-ID: <c8d3628f-8d7a-4eae-aa16-bbd8f16b54b5@u36g2000prf.googlegroups.com>

On May 13, 11:51 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
> You meant readlines(), I presume. A file acts as its own iterator:
>
> f=os.open("./get_hostnames")
> try:
>    for line in f:
>      # do something with line
> finally:
>    f.close()
>
> --
> Gabriel Genellina

Hi - thank you for your reply.

I meant:

f=os.popen("./get_hostnames").readlines()

So f is a list, rather than a file object, of which os.open would have
returned (my initial typo redirected the missive of this post, sorry!)

cheers




From kyosohma at gmail.com  Fri May 16 09:15:41 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:15:41 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>
Message-ID: <826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>

On May 16, 1:51?am, Chris <cwi... at gmail.com> wrote:
> On May 15, 5:13?pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > Hi,
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> > shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> > Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to Firefox
> > out, it works too. Is there another method I can use other than
> > creating the shortcut by hand and using the shutil module?
>
> > Thank you for any ideas.
>
> > Mike
>
> Don't set arguments in the path.
>
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.TargetPath = r'Program Files\Mozilla Firefox\firefox.exe'
> shortcut.Arguments = r'https:\www.myCompanyWebsite.com\auth
> \preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> shortcut.save()

Ah. I was unaware of the Arguments parameter. That works quite well.
Where does one find this information anyway? I think I found mine from
bits and pieces scattered in various tutorials.

Thanks a lot.

Mike


From patrickstinson.lists at gmail.com  Mon May 26 15:17:38 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Mon, 26 May 2008 11:17:38 -0800
Subject: definition of a highlevel language?
In-Reply-To: <34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <6214d7a20805261217x14021c2bx643a07166d69ac9c@mail.gmail.com>

The way I think of it is that a language is commonly referred to by the
implementation of syntax and semantics. The implementation is defined by
a processable medium, for example 1) punch cards, 2) processor-specific
code, or 3) some processor code interpreting some other code.
Examples include:

1) I'm too young to know :)
2) common low-level language like C
3) common high-level like python

ikke norska? kvorfor ikkje? itne? hva for noke?

On Mon, May 26, 2008 at 11:02 AM, <notnorwegian at yahoo.se> wrote:

> On 26 Maj, 20:57, miller.pau... at gmail.com wrote:
> > On May 26, 2:34 pm, notnorweg... at yahoo.se wrote:
> >
> > I wanted to address some other points I failed to mention in my first
> > response.
> >
> > > so are they fundamentally differently built or is it just a lot of
> > > lowlevel operations built on top of each other?
> >
> > Partly.  A high-level language is essentially one that gives you high-
> > level operations, like "apply the function f to each element of the
> > sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].
> >
> > But, it's more than that.  (You use Haskell as your example, but I'll
> > use Python because I know it roughly a million percent better than
> > Haskell... hehe.)  In Python, you have support from the language to
> > treat functions as first-class objects; in C, you explicitly cannot do
> > this -- to map an arbitrary function over a sequence, you're
> > restricted to accessing the function through a pointer.  On the
> > surface, it's the same operation, but that extra level of indirection
> > can really bog one's mind down.  Think about how difficult it is for a
> > human to interpret the declaration of a function pointer in C, for
> > instance.
> >
> > > haskell is considered a very highlevellanguage but can you do
> > > systemsprogramming with it(yes maybe it is very unpractical i dont
> > > know but can you)?
> > > is lambda calculus a more abstract and efficient way of modeling a
> > > computer?
> >
> > Lambda calculus doesn't model computers.  It models *computation*.
> > That is, given a Turing machine, there's a set of functions in the
> > lambda calculus, which, when suitably combined, will yield the exact
> > same result as the original Turing machine.  That doesn't in any way
> > imply that Turing machines work by interpreting lambda calculus.
> >
> > > how did lispmachines work? was the basic system programmed in LISP?
> >
> > Yes, the whole kit and kaboodle, all the way down to the microcode was
> > programmed in LISP.  In principle, there's no reason we couldn't have
> > Haskell machines or Python machines.  It's just that nobody's been
> > crazy enough to do it, that I know of. :-)
>
>
> what is crazy about it?
>
> in the same way programming webapps in C would be annoying because you
> have to do a lot of lowlevel tasks it is dumb to program computer ina
> highlevellanguage because you dont have direct access to lowlevel
> tasks meaning you cant program it very efficiently, ie make it fast?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From martin at v.loewis.de  Sun May 25 16:15:56 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:15:56 +0200
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <4839C8FC.2020408@v.loewis.de>

> ok where does the 1 in the come from?

http://www.python.org/doc/faq/general/#why-are-floating-point-calculations-so-inaccurate

Regards,
Martin


From ivlenin at gmail.com  Sun May 25 22:51:15 2008
From: ivlenin at gmail.com (I V)
Date: Mon, 26 May 2008 02:51:15 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
	<g1d3lf$1rpd$3@news.mtu.ru>
	<bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>
Message-ID: <DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>

On Sun, 25 May 2008 21:41:09 -0400, Jerry Stuckle wrote:
> The the good programmers are able to adapt to the language and make the
> most of whatever language they're using.  The result is good code. OTOH,
> poor programmers I have known have found all kinds of excuses - from the
> language itself to lack of requirements, to anything else they can
> blame, except the real root of the problem.

That's true - but I wonder if there might not be differences at the 
margins. Some languages (and, which is not quite the same but not easy to 
fully distinguish either, the communities around some languages) may 
encourage mediocre programmers to produce slightly more or less mediocre 
programs.

Some features of Python (the one that really stands out for me is not 
default-initializing variables on first use; the comparatively clean 
standard library might be another), and some features of the Python 
community (which, IME, has more members more explicitly committed to 
writing clean code) I think do make Python a better environment for us 
mediocre programmers.

But maybe I'm wrong - I've never been paid to write Python programs, 
whereas I have been paid to write PHP, so I might just be projecting my 
frustrations with work onto the language. I've also not used PHP5 much in 
anger, which does look to be a lot nicer than earlier versions.


From arne at vajhoej.dk  Fri May 30 21:35:47 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Fri, 30 May 2008 21:35:47 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
Message-ID: <4840ab73$0$90274$14726298@news.sunsite.dk>

Stephan Bour wrote:
> Lew wrote:
> } John Thingstad wrote:
> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
> } > I don't like the style, but many do.
> }
> } Please exclude the Java newsgroups from this discussion.
> 
> Did it ever occur to you that you don't speak for entire news groups?

Did it occur to you that there are nothing about Java in the above ?

Arne


From fuzzyman at gmail.com  Sun May 25 08:11:18 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 05:11:18 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<87tzgm3h4q.fsf@gmail.com>
Message-ID: <c808bc1b-79e2-486b-95da-2e3fb8cca032@m45g2000hsb.googlegroups.com>

On May 25, 9:47?am, vivai... at gmail.com (Ville M. Vainio) wrote:
> Fuzzyman <fuzzy... at gmail.com> writes:
> >> Perhaps a lint-like validation tool would be optimal for this
> >> problem...
>
> > So we can refuse to execute their code if they use private APIs?
>
> No, but it could complain and point out the exact offending lines,
> pointing their development effort to right direction.
>
> > Proxying so that we can really hide our internal APIs is a better
> > solution.
>
> How about pyprotocols and other interface packages?
>


We're using IronPython. I haven't looked at pyprotocols but I know the
Zope interface package is at least partly written in C. Our
spreadsheet object model is very 'performance sensitive', so that's a
consideration. We should definitely explore the prior art in this area
before we implement anything ourselves.

Thanks

Michael Foord
http://www.ironpythoninaction.com/

> Proxying is pretty workable too, and it easily makes sense that the
> official API objects should be different from the logic executing
> objects.



From woodygar at sky.com  Sat May 24 14:32:56 2008
From: woodygar at sky.com (garywood)
Date: Sat, 24 May 2008 19:32:56 +0100
Subject: for some reason the actual tries figure is not right 
Message-ID: <002301c8bdcc$979ce8c0$1300a8c0@Home>

can someone explain why the tries displays the wrong number
thanks 
orginally i started off with tries = 0 but it was off by 2  



# Word Jumble
#
# The computer picks a random word 
# The player has to guess the original word can give hint

import random
tries = 1
# create a sequence of words to choose from
word = ("python", "jumble", "xylophone", "difficult", "answer")
# pick one word randomly from the sequence
word = random.choice(word)
# create a variable to use later to see if the guess is correct
correct = word

# start the game
print \
"""
           Welcome to Word Jumble!
        
   
(Press the enter key at the prompt to quit.)
"""

if word == "python":
    hint = 'snake'
if word == "jumble":
    hint = 'mess'
if word == "difficult":
    hint = 'hard'
if word == "answer":
    hint = 'correct'
if word == "xylophone":
    hint = 'music'
     
    
guess = raw_input("\nYour guess: ")
guess = guess.lower()
while (guess != correct) and (guess != ""):
    print "Sorry, that's not it." + hint
    guess = raw_input("Your guess: ")
    guess = guess.lower()
if guess != correct:
    print hint
tries += 1
if guess == correct:
    print "That's it!  You guessed it!\n"

print "Thanks for playing."
print tries
raw_input("\n\nPress the enter key to exit.")
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From usenet at janc.be  Fri May 16 18:03:22 2008
From: usenet at janc.be (Jan Claeys)
Date: Fri, 16 May 2008 22:03:22 GMT
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<68rmafF2t1vboU1@mid.uni-berlin.de>
Message-ID: <pan.2008.05.16.22.05.12@news.janc.be>

Op Mon, 12 May 2008 22:06:28 +0200, schreef Diez B. Roggisch:

> There is no way to interpret the JS in Python,

There is at least one way:
<http://wwwsearch.sourceforge.net/python-spidermonkey/>


-- 
JanC


From sposnjak at gmail.com  Mon May  5 10:30:37 2008
From: sposnjak at gmail.com (Simon Posnjak)
Date: Mon, 5 May 2008 16:30:37 +0200
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <20080505141651.6859.554247783.divmod.quotient.59048@ohm>
References: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>
	<20080505141651.6859.554247783.divmod.quotient.59048@ohm>
Message-ID: <725404980805050730n1efe320fpf03dec3735fc1875@mail.gmail.com>

On Mon, May 5, 2008 at 4:16 PM, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>
> On Mon, 5 May 2008 16:05:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>
> > On Mon, May 5, 2008 at 3:48 PM, Jean-Paul Calderone <exarkun at divmod.com>
> wrote:
> >
> > > On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com>
> wrote:
> > >
> > > > Hi!
> > > >
> > > > I have a C module for which I created a wrapper with swig. The
> function
> > > def is:
> > > >
> > > > C:
> > > >
> > > > int some_thing(unsigned char * the_str);
> > > >
> > > > eg:
> > > >
> > > > Python:
> > > >
> > > > some_module.some_thing (the_str)
> > > >
> > > > Now I would like to feed it with a UTF-8 formatted string:
> > > >
> > > > test = u'Make \u0633\u0644\u0627\u0645, not war.'
> > > >
> > >
> > >  `test? is not a UTF-8 encoded string.  It's a unicode string.
> > >
> > >  To get a UTF-8 encoded string from a unicode string, use the `encode?
> > >  method:
> > >
> > >   some_module.some_thing(test.encode('utf-8'))
> > >
> >
> > Yes you are correct. It is unicode string. But still if I use encode I
> > get the same error:
> >
> > TypeError with message: in method 'some_thing', argument 1 of type
> > 'unsigned char *'
> >
> > So I am looking for a way to "cast" unicode string to unsigned char *.
> >
> >
>
>  You need to provide some more information about `some_module.some_thing?.
>  How is it implemented?  What Python type does it expect?  If it doesn't
>  take a unicode string and it doesn't take a byte string, I don't know
>  what kind of string it does take.

some_module.some_thing(the_string) function is a swig generated
function from a C lib. The C lib function expects unsigned char *.

The generated function is:

SWIGINTERN PyObject *_wrap_some_thing(PyObject *SWIGUNUSEDPARM(self),
PyObject *args) {
  PyObject *resultobj = 0;
  unsigned char *arg1 = (unsigned char *) 0 ;
  unsigned char result;
  void *argp1 = 0 ;
  int res1 = 0 ;
  PyObject * obj0 = 0 ;

  if (!PyArg_ParseTuple(args,(char
*)"O:cpot_printer_simple_printf",&obj0)) SWIG_fail;
  res1 = SWIG_ConvertPtr(obj0, &argp1,SWIGTYPE_p_unsigned_char, 0 |  0 );
  if (!SWIG_IsOK(res1)) {
    SWIG_exception_fail(SWIG_ArgError(res1), "in method '"
some_thing"" "', argument " "1"" of type '" "unsigned char *""'");
  }
  arg1 = (unsigned char *)(argp1);
  result = (unsigned char)some_thing(arg1);
  resultobj = SWIG_From_unsigned_SS_char((unsigned char)(result));
  return resultobj;
fail:
  return NULL;
}


From venkat83 at gmail.com  Fri May 16 07:22:17 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Fri, 16 May 2008 04:22:17 -0700 (PDT)
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com> 
	<slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <1ff9bbaa-ae04-495a-a9a3-d2f7741e6cc5@k10g2000prm.googlegroups.com>

On May 16, 7:45 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:

Thanks

> By picking better names, the config gets much more readable.
>
> The big advantage here is that a config file is something readable and editable
> without appearing it to be Python.
> If this is too low level for your users, you can use it as a data exchange
> format between the processing application and the frontend application where
> users can change the values.

The problem being, if i change the config file, then the configobj has
to reload this file again. I do not want to 'refresh' the config obj
per transaction but only when the config params change.

> > Now when i 'manually' make some changes to the value of a,b,c,d then
> > the the checkCutoff func should refer to the new values.
>
> Maybe reload the file each time you run the program?

The program is never-ending and do not think in terms of websites here
- probably something like a server/middleware which can never be
brought down.

I was thinking along the terms of an Interrupt driven program, which
when getting a custom interrupts reloads the file - any potential
loopholes/falls that anyone can anticipate?

Regards,
Venkat


From cshirky at gmail.com  Mon May 12 14:30:52 2008
From: cshirky at gmail.com (cshirky)
Date: Mon, 12 May 2008 11:30:52 -0700 (PDT)
Subject: buffering choking sys.stdin.readlines() ?
References: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
	<68r63qF2s4ksaU1@mid.uni-berlin.de>
Message-ID: <819bdd3b-ec6b-41a5-99ab-ac85f08b99a7@8g2000hse.googlegroups.com>

> readlines() reads all of the file into the memory. Try using xreadlines,
> the generator-version, instead. And I'm not 100% sure, but I *think* doing
>
> for line in sys.stdin

both work -- many thanks.

-clay


From larzluv at hotmail.com  Mon May 12 03:14:51 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Mon, 12 May 2008 00:14:51 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>
Message-ID: <18b87c2b-742d-458f-aee0-404249547baf@l42g2000hsc.googlegroups.com>

On May 12, 1:34 am, Larry Hale <larz... at hotmail.com> wrote:

> The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
> has the man pages...


Err...  I meant "http://downloads.sourceforge.net/gnuwin32/file-4.21-
bin.zip?modtime=1180175868&big_mirror=1"!  :)


From skanemupp at yahoo.se  Tue May 13 14:20:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:20:35 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <f77824d7-a832-4e8d-81c2-57265871e3bf@8g2000hse.googlegroups.com>

On 13 Maj, 19:10, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi


nasa, google, industrial light and magic(starwars second trilogy) ,
astra zeneca, reddit.


From lists at cheimes.de  Tue May 13 18:30:43 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 00:30:43 +0200
Subject: usage of python
In-Reply-To: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0d4qk$14n$1@ger.gmane.org>

Rajarshi schrieb:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
> 
> Is there any list with people/groups/companies using Python for
> impressive things?
> 
> Any pointers would be appreciated

Additionally to the other URLs:

http://highscalability.com/youtube-architecture
http://highscalability.com/google-architecture
http://www.ohloh.net/projects/python

Christian



From hdante at gmail.com  Sat May  3 16:13:04 2008
From: hdante at gmail.com (hdante)
Date: Sat, 3 May 2008 13:13:04 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
Message-ID: <b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>

On May 3, 3:44?pm, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> Arnaud Delobelle wrote:
>
> > sum() works for any sequence of objects with an __add__ method, not
> > just floats! ?Your algorithm is specific to floats.
>
> This occurred to me also, but then I tried
>
> sum(['abc', 'efg'], '')
>
> and it did not work. ?Or is this just a special exception to prevent the
> ? misuse of sum to join strings? ?(As I said, I'm only an occasional user.)
>
> Generally, sum() seems to be most useful for numeric types (i.e. those
> that form a group with respect to __add__ and __neg__/__sub__), which
> may be either exact (e.g. integers) or inexact (e.g. floating point
> types). ?For exact types it does not make sense to use compensated
> summation (though it wouldn't give an incorrect answer, either), and
> sum() cannot decide whether a user-defined type is exact or inexact.
>
> But I guess that it would still be possible to make sum() use
> compensated summation for built-in floating point types (float/complex).
>
> Or, to go further, provide a switch to choose between the two methods,
> and make use compensated summation for float/complex by default. ?(But
> perhaps people would consider this last alternative a bit too messy.)
>
> (Just some thoughts ...)

 The benefits should be weighted considering the common case. For
example, do you find an error of 10^-14 unbearable ? How many times
someone will add 1.000.000 numbers in a typical scientific application
written in python ?

 I believe that moving this to third party could be better. What about
numpy ? Doesn't it already have something similar ?


From fiacre.patrick at gmail.com  Fri May 23 03:05:58 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:05:58 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
Message-ID: <48366cfa$0$15168$607ed4bc@cv.net>

Jimmy wrote:
> Hi to all
> 
> python now has grown to a versatile language that can
> accomplish tasks for many different purposes. However,
> AFAIK, little is known about its ability of kernel coding.
> 
> So I am wondering if python can do some kernel coding that
> used to be the private garden of C/C++. For example, can python
> intercept the input of keyboard on a system level? someone told me
> it's a kernel thing, isn't it?


http://wiki.python.org/moin/elmer



From castironpi at gmail.com  Wed May  7 20:41:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:41:17 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com> 
	<68dpjdF2rvl8oU1@mid.uni-berlin.de>
Message-ID: <c44aea57-b367-4091-9a1d-c6f2b004d167@a23g2000hsc.googlegroups.com>

On May 7, 8:36?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jetus wrote:
> > On May 4, 7:22 am, castiro... at gmail.com wrote:
> >> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> >> wrote:
>
> >> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com>
> >> > escribi?:
>
> >> > > Is there a good place to look to see where I can find some code that
> >> > > will help me to save webpage's links to the local drive, after I have
> >> > > used urllib2 to retrieve the page?
> >> > > Many times I have to view these pages when I do not have access to
> >> > > the internet.
>
> >> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> >> > --
> >> > Gabriel Genellina
>
> >> A lot of the functionality is already present.
>
> >> import urllib
> >> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> >> from htmllib import HTMLParser
> >> from formatter import NullFormatter
> >> parser= HTMLParser( NullFormatter( ) )
> >> parser.feed( open( 'main.htm' ).read( ) )
> >> import urlparse
> >> for a in parser.anchorlist:
> >> ? ? print urlparse.urljoin( 'http://python.org/', a )
>
> >> Output snipped:
>
> >> ...http://python.org/psf/http://python.org/dev/http://python.org/links/h...
> >> ...
>
> > How can I modify or add to the above code, so that the file references
> > are saved to specified local directories, AND the saved webpage makes
> > reference to the new saved files in the respective directories?
> > Thanks for your help in advance.
>
> how about you *try* to do so - and if you have actual problems, you come
> back and ask for help? Alternatively, there's always guru.com
>
> Diez- Hide quoted text -
>
> - Show quoted text -

I've tried, no avail.  How does the open-source plug to Python look/
work?  Firefox was able to spawn Python in a toolbar in a distant
land.  Does it still?  I believe under DOM, return a file named X that
contains a list of changes to make to the page, or put it at the top
of one, to be removed by Firefox.  At that point, X would pretty much
be the last lexicly-sorted file in a pre-established directory.  Files
are really easy to create and add syntax too, if you create a bunch of
them.  Sector size was bouncing though, which brings that all the way
up to file system.

for( int docID= 0; docID++ ) {
  if ( doc.links[ docID ]== pythonfileA.links[ pyID ] ) {
    doc.links[ docID ].anchor= pythonfileB.links[ pyID ];
    pyID++;
  }
}


From torriem at gmail.com  Wed May  7 17:51:37 2008
From: torriem at gmail.com (Michael Torrie)
Date: Wed, 07 May 2008 15:51:37 -0600
Subject: Why don't generators execute until first yield?
In-Reply-To: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <48222469.70803@gmail.com>

Martin Sand Christensen wrote:
> Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?

A great example of why this behavior would defeat some of the purpose of
generators can be found in this amazing PDF presentation:

http://www.dabeaz.com/generators/Generators.pdf

> Giving generators special case semantics for no good reason is a really
> bad idea, so I'm very curious if there is a good reason for it being
> this way. With the current semantics it means that errors can pop up at
> unexpected times rather than the code failing fast.

Most assuredly they do have good reason.  Consider the cases in the PDF
I just mentioned.  Building generators that work on the output of other
generators allows assembling entire pipelines of behavior.  A very
powerful feature that would be impossible if the generators had the
semantics you describe.

If you want generators to behave as you suggest they should, then a
conventional for x in blah approach is likely the better way to go.

I use a generator anytime I want to be able to iterate across something
that has a potentially expensive cost, in terms of memory or cpu, to do
all at once.


From bronger at physik.rwth-aachen.de  Tue May 13 12:04:27 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 13 May 2008 18:04:27 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <87hcd2gph0.fsf@physik.rwth-aachen.de>

Hall?chen!

Dave Parker writes:

> [...]
>
> Perhaps.  Flaming Thunder is only $19.95 per year for an
> individual (and even less per individual for site licenses), which
> is less than the cost of just one book on Python.

First of all: Although I consider myself part of the Free Software
community, I have no problems at all with such a licence model.

But ...

> [...]
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This
> weekend, Python users will still be debating how to fix
> awkwardnesses in the languages (such as FOR loops where you're
> just counting the loops and not referencing the loop variable) --
> but Flaming Thunder users will be getting work done using the
> REPEAT n TIMES constructs that I'll be implementing.

Well, this is besides the point in my opinion.  First, what you
consider a wart may be loved by someone else.  I for example would
consider a "REPEAT n TIMES" feature as Ruby offers it (and soon FT
apparently) ugly because it is superfluous.

And secondly, *every* language has their warts.  So many languages
start as clean babies because they offer little and focus on a
specific domain.  But grown up, they include the same dirty tricks
and suprising corners as the big languages.

For me being a physicist and a hobby programmer, FT still is a toy
language.  Cute but titchy.  It surely has its applications, but if
you produce pocket calculators, don't tell a computer manufacturer
that your machines are much simpler to use.  Instead, both things
simply have their purposes.

> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months
> and those awkwardnesses are already getting fixed.  The
> difference: I can't afford to ignore users.

Really, the Python developers listen *very* carefully what the users
want.  Of course, the response time in Python is months rather than
days, which has turned out to be a good thing more than once.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From hrpenf at gmail.com  Wed May 21 05:07:38 2008
From: hrpenf at gmail.com (RaymondHe)
Date: Wed, 21 May 2008 02:07:38 -0700 (PDT)
Subject: How to transfer files over serial?
Message-ID: <dc9268f1-061e-48a8-8598-420f35fc858a@u12g2000prd.googlegroups.com>

I want to transfer files over serial,but PySerial Module does not
support any protocol such as xmodem/ymodem,and I find nothing about
these protocol write in python

What should I do?Thank you


From ivan.illarionov at gmail.com  Mon May 12 23:18:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 03:18:10 +0000 (UTC)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
Message-ID: <g0b19h$2ne$1@news.mtu.ru>

On Mon, 12 May 2008 19:19:05 -0700, Jimmy wrote:

> Well, i know it may be a little non-python thing, however, I can think
> of no place better to post this question :)
> 
> can anyone tell me, in python, how to obtain some information of a
> running program?
> paticularly, if i am playing some music in audacious or other media
> player, how can i get the the name and some other info of current
> playing song? It seems that audicious doesn't output on run-time

In case of Audatious running on X11 all you need is Python X library
http://python-xlib.sourceforge.net/

And something like:

from Xlib import display

dpy = display.Display()
root = dpy.screen().root

NET_WM_NAME = dpy.intern_atom('_NET_WM_NAME')
UTF8_STRING = dpy.intern_atom('UTF8_STRING')

for win in root.query_tree().children:
    try:
        window_title = win.get_full_property(NET_WM_NAME, 
UTF8_STRING).value
    except AttributeError:
        continue
    if window_title.endswith('Audacious'):
        song = window_title.split(' - ')[:-1]
        if song:
            print song

-- Ivan


From webmaster at monzell.com  Sun May 11 01:05:02 2008
From: webmaster at monzell.com (Rilindo Foster)
Date: Sun, 11 May 2008 01:05:02 -0400
Subject: Now what!?
In-Reply-To: <8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
Message-ID: <83DE3A94-92A2-4852-B44F-B2F91E924B2B@monzell.com>

I don't know the context of the discussion, since I just joined the  
list, but:


On May 10, 2008, at 11:05 PM, hdante wrote:

> On May 10, 8:22 pm, notbob <not... at nothome.com> wrote:
>> On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>>
>>>    So... in short, you'd need to have been reading a tutorial  
>>> specific
>>> to "shell" scripting...
>>
>> I have been.  I'm also trying to learn bash shell scripting, not to  
>> mention
>> sed/awk, php, etc.  I should have started this a long time ago, but  
>> I'm lazy
>
> Throw all of this away and learn just python. That will be much
> simpler for you.

Ummm, if you are working with Unix and Unix-like systems, you should  
know shell scripting. Work through that first and then when you find  
that you can't get things done with a shell script, go with Python (or  
failing that, Perl :) ).

  - Rilindo


From mccredie at gmail.com  Tue May 27 12:10:09 2008
From: mccredie at gmail.com (Matimus)
Date: Tue, 27 May 2008 09:10:09 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <176349fa-381e-4b02-8b41-3a7da3725b76@p25g2000pri.googlegroups.com>

On May 27, 8:21?am, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker
>
> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> wrote:
>
> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > > seems to be needed
>
> > > He doesn't seem to care much anyway now
>
> > > Or if he cares, he have many other assignments
>
> > Who are you talking about?
>
> > > So should we try to elect a new chairman?
>
> > Chairman? Elaborate please.
>
> > > I am probably not eligible. There must be many others.!
>
> > > Do you dare?consper
>
> > Hm, are you and castrionpi twin brothers or something?
>
> > > S.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > Wbr, Andrii Mishkovskyi.
>
> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
>

Guido is the BDFL: Benevolent Dictator For Life. He was not elected.
If you want new leadership in Python it won't be done via a vote, it
will be via a coup. You will need to create your own community (and
probably fork of Python) that is superior to the existing version. So
much that people decide to migrate from one to the other.

Any conversation that leads to such a communal fork would probably
begin with discussing things that should be done differently in Python
and garnering support.

Personally, what I like _most_ about python is the community. Guido
played a large part in establishing this community. If you put
together a coherent argument regarding the future of Python people
will listen, including Guido.

Matt



From ian.g.kelly at gmail.com  Thu May  8 23:48:48 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Thu, 8 May 2008 21:48:48 -0600
Subject: Free Memory
In-Reply-To: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
Message-ID: <3fc761710805082048q1da9be4fw2c75a06ec3ebdc6e@mail.gmail.com>

On Thu, May 8, 2008 at 6:30 PM, Dark Wind <darkwind.87 at gmail.com> wrote:
> Hi,
>
> How can I free all the memory in python by deleting all variables. I am
> looking for the equivalent of 'clear' from Matlab.
>
> I know del x deletes a variable x, but it doesn't free all the available
> memory.

I don't know if there's a good way to do exactly what you're asking
for.  However, if you really want to reset *everything*, you could
replace the current process with a fresh interpreter by calling
os.execlp("python").


From fabiofz at gmail.com  Wed May  7 10:16:50 2008
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Wed, 7 May 2008 11:16:50 -0300
Subject: Pydev 1.3.16 Released
Message-ID: <cfb578b20805070716v5f0af286oe7289f53e9ec3907@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.16 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Code Analysis: __path__ Not correctly found on some situations.
* Local rename (ctrl+2+r): Positions correctly ordered for tabbing.


Release Highlights in Pydev:
----------------------------------------------

* Interactive console: help() works
* Interactive console: context information showing in completions
* Interactive console: backspace will also delete the selected text
* Interactive console: ESC does not close the console when in floating
mode anymore
* Code completion: calltips context info correctly made 'bold'
* Code completion: variables starting with '_' do not come in import *
* Code completion: can be requested for external files (containing system info)
* Code completion: fixed recursion condition
* Code completion: egg file distributed with dll that has a source
module with the same name only with a __bootstrap__ method now loads
the dll instead of the source module (e.g.: numpy egg)
* Debugger: Step over/Step return can now execute with untraced frames
(much faster)
* Debugger: Problem when handling thread that had no context traced
and was directly removed.
* Launching: F9 will reuse an existing launch instead of creating a
new one every time
* Launching: The default launch with Ctrl+F11 will not ask again for
the launch associated with a file (for new launches -- old launches
should be deleted)
* Project Explorer: fixed integration problems with CDT (and others)
* Launch: console encoding passed as environment variable (no longer
written to the install location)
* More templates for "surround with" (Ctrl+1)
* Previous/next method could match 'class' and 'def' on invalid location
* Outline: Assign with multiple targets is recognized
* Bug fix for pydev package explorer when refreshed element parent was null



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and
Jython development -- making Eclipse a first class Python IDE -- It
comes with many goodies such as code completion, syntax highlighting,
syntax analysis, refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com


From matthieu.brucher at gmail.com  Sun May 18 03:53:09 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sun, 18 May 2008 09:53:09 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
	<c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>
	<20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>
Message-ID: <e76aa17f0805180053u14e5dc78n2747aa5161150e1b@mail.gmail.com>

2008/5/15 John Salerno <johnjsal at nospamgmail.com>:

> On Tue, 13 May 2008 06:25:27 -0700 (PDT)
> Dave Parker <daveparker at flamingthunder.com> wrote:
>
> > > I'm pretty generally interested, but where can print layout take you?
> >
> > Not far, especially with books disappearing.  Our library says that
> > these days, only 25% of their checkouts are books; the other 75% are
> > DVDs, CDs, etc.
>
> Sorry, but I must point out a logical flaw in this statement. Assuming your
> stats are even true, just because books are now only 25% of checkouts rather
> than, for example, 80%, doesn't necessarily imply that any less books are
> being checked out (i.e. "disappearing"). It can just as easily mean that
> *more* of the other things are being checked out while books remain the
> same.
>
> Example:
>
> Total number of items checked out:    100
> Total number of books checked out:     80
> Percentage of books checked out:       80%
>
> Total number of items checked out:    320
> Total number of books checked out:     80       # same as above
> Percentage of books checked out:       25%
> --
> http://mail.python.org/mailman/listinfo/python-list
>

In France, the book market is bigger (in terms of money) than the DVD and CD
market IIRC. That's strange, isn't it ?

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From deets at nospam.web.de  Fri May 16 11:28:52 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 17:28:52 +0200
Subject: writing python extensions in assembly
In-Reply-To: <b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
Message-ID: <695ni3F30u8tgU2@mid.uni-berlin.de>

inhahe schrieb:
> Well the problem is that I'm actually not an assembler guru, so I don't know 
> how to implement a dll in asm or use a c calling convention, although I'm 
> sure those instructions are available on the web.  I was just afraid of 
> trying to learn that AND making python-specific extensions at the same time. 
> I thought of making a c extension with embedded asm, but that just seemed 
> less than ideal.  But if somebody thinks that's the Right Way to do it, 
> that's good enough..

I think the right thing to do if you are not as fluent in assembly is do 
not do anything in it at all. What do you need it for?

Diez


From pavlovevidence at gmail.com  Tue May 13 14:47:23 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 11:47:23 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
Message-ID: <6bb0ca79-1070-4d42-90a9-a1066b152210@d1g2000hsg.googlegroups.com>

On May 13, 1:44 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>
> > Does anyone know of any (preferably largish) examples of literate
> > programs written using Python?  Alternatively, does anyone know of any
> > literate programming tools which support Python well?  (I am aware of
> > Leo and I've been to literateprogramming.com, but any additional
> > pointers would be much appreciated!)
>
> Check out Zope, bittorrent, or Editra. You should just go to
> SourceForge and do a search for projects done in Python.


Those aren't examples of literate programming AFAIK.  (Check Wikipedia
for "literate programming" if you're still confused.)

It occurs to me that one could get pretty close to literate
programming with Pure Python (if they stick to regular function calls
and not expect code weaving, which would need a preprocessor).  A
fairly simple script could  parse docstrings and Python source files
to produce a document from the source.  In fact, there are tools that
can do that sort of thing already, but I doubt they output documents
according to literate programming expectations.  Don't know of any
tools specifically for literate programming.


Carl Banks


From sophacles at gmail.com  Thu May 22 20:00:14 2008
From: sophacles at gmail.com (Erich)
Date: Thu, 22 May 2008 17:00:14 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<m2d4ne6w4a.fsf@googlemail.com>
Message-ID: <9ef43041-3bf6-45b5-8623-afaf7755d660@z66g2000hsc.googlegroups.com>

On May 22, 1:18 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
<snip lots>
> My mum's fast...<more snipping>
<snip some more>
> Arnaud

Was it a good idea to include that bit in a troll response?

If English isn't your first language, it's one of those language
idioms that's not very nice to say about someone's mother (especially
your own mother).

Erich


From castironpi at gmail.com  Wed May 14 12:20:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 09:20:18 -0700 (PDT)
Subject: named tuple mutability
Message-ID: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>

I'm concerned over the future of Python.  Should tuples be named?


From gagsl-py2 at yahoo.com.ar  Sun May 11 17:15:38 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 18:15:38 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
	<3de8e1f70805102117p584e5920hb4a99166488c6448@mail.gmail.com>
Message-ID: <op.ua0dccu1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 01:17:22 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> I realized that my query was not making much sense, or a bit convoluted. A
> simler form of the question:
>
> For packages which do contain .dlls & .pyd's (not pure Python) their latest
> version may be compatible with -- say Python 2.5, whereas I need the version
> compatible for Python2.2. Is this a completely manual exercise ?

You don't have to try - binaries for different Python versions *are* *not* compatible (up to the second digit: 2.4 and 2.5 are not compatible, but 2.5.1 and 2.5.2 are). So any extension using a .pyd/.dll will have to be recompiled, at least.
Even pure Python code written for 2.5 may use features not available in 2.2.

Packages built using setuptools (eggs) may contain explicit dependency information but I don't know for sure.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Sun May 11 14:28:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 19:28:17 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
Message-ID: <m263tk4rwe.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> bc90021 <python at bc90021.net> writes:
>
>> On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:
>>
>>> bc90021 <python at bc90021.net> writes:
>>> 
>>>> Hi All,
>>>>
>>>> Thanks in advance for any and all help!
>>>>
>>>> I have this code:
>>>>
>>>> g = open(fileName, 'a')
>>>>
>>>> where fileName is defined before the line it's used in.  It works fine
>>>> when I use it outside a thread class.
>>>>
>>>> When I put the same line in a thread class, it no longer works, and I
>>>> get an error:
>>>>
>>>> IOError: [Errno 2] no such file u'fileName'
>>>>
>>>>
>>> It's telling you that you haven't got a file called 'fileName'. Posting
>>> the code that triggers this error would allow people to diagnose the
>>> error accurately rather than guessing.
>>
>> f = open(otherFile).readlines()
>> for i in len(f):
>> 	for c in range(0,24,1):
>> 		if os.name == "posix":
>> 			tempfileName = "\"proctemp/" + self.matrix[c][0] 
>> + "_tmp_" + fileName + ".txt\""
>>    	if re.search(f[i], pattern):
>> 		g = open(tempfileName, 'a')
>> 		g.write(f[i])
>>
>>
>> This code works *perfectly* unless I put it in a class that inherits from 
>> threading.Thread.  In the thread class, everything works (I can see the 
>> "c" value, and I can print out each line in "f[i]", it's just that the g 
>> = open line doesn't work.
>
> It's difficult to know what's wrong with the code you posted because:
>
> * it is not self-contained: otherFile, fileName, pattern are names
>   which you do not define;
>
> * the IOError you reported earlier can't arise as a result of running
>   this code.

Correction: it can, if otherFile == u'fileName'

So I put 1000 rupees on this being the cause of the error :)

-- 
Arnaud


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:53:07 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:53:07 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <b848dcb1-6922-4cb4-ad1f-eac32e9268ec@l17g2000pri.googlegroups.com>

On May 8, 10:34 am, andrej.panj... at climatechange.qld.gov.au wrote:
>
> >>> HeightDistrib = (170, 20)
>

That should be
> >>> HeightDistrib = Gaussian(170, 20)


From george.sakkis at gmail.com  Mon May  5 23:11:54 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 5 May 2008 20:11:54 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
Message-ID: <ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>

On May 5, 6:57 pm, Matimus <mccre... at gmail.com> wrote:
> On May 5, 10:22 am, Francesco Bochicchio <bock... at virgilio.it> wrote:
>
>
>
> > On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:
> > > Hi,
> > >  In my application, I have some configurable information which is used
> > > by different processes. currently I have stored configration in a
> > > conf.py file as name=value pairs, and I am importing conf.py file to
> > > use this variable. it works well
>
> > > import conf
> > > print conf.SomeVariable
>
> > > but if I need to change some configuration parameteres,  it would need
> > > me to restart processes.
>
> > > I want to store this data in some conf file (txt) and would like to
> > > use it same way as I am using these variables as defined in py
> > > files.
>
> > > one solution I can think of is writing data as a dictionary into conf
> > > file. and then by reading data, apply eval on that data. and update
> > > local dict? but this is not a good solution....
>
> > > any pointers?
>
> > > Sandip
>
> >  The 'simple but relatively dangerous way', already suggested, is to
> >  reload() the module.
>
> > A safer way - but requiring more work - could be to build something around
> > the Configparser module in the standard library ...
>
> > Ciao
> > -----
> > FB
>
> How is it relatively dangerous? I mean, aside from any `dangers'
> associated with importing a user defined module in the first place.

Read the caveats in reload()'s description. Briefly:
- It does not reload names imported with "from  ... import ...".
- Any existing instances of classes defined in the module still refer
to the original class, not the reloaded one (assuming it is still
present).
- The module's dictionary (containing the module's global variables)
is retained and updated in place, so names that are deleted in the
module are still available.
- It is not recursive.
- And more...

George


From ricaraoz at gmail.com  Tue May 13 19:08:51 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 13 May 2008 20:08:51 -0300
Subject: python vs. grep
In-Reply-To: <87k5hy20eo.fsf@gmail.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>	<mailman.813.1210286049.12834.python-list@python.org>	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>	<mailman.1004.1210630577.12834.python-list@python.org>
	<87k5hy20eo.fsf@gmail.com>
Message-ID: <482A1F83.2030505@bigfoot.com>

Ville M. Vainio wrote:
> Ricardo Ar?oz <ricaraoz at gmail.com> writes:
> 
>> The easy/simple (too easy/simple?) way I see out of it is to read THE
>> WHOLE file into memory and don't worry. But what if the file is too
> 
> The easiest and simplest approach is often the best with
> Python. 

Keep forgetting that!

> 
> If the file is too big, you might want to look up mmap:
> 
> http://effbot.org/librarybook/mmap.htm

Thanks!


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:34:56 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:34:56 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>

On May 8, 7:38 am, globalrev <skanem... at yahoo.se> wrote:
> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
>                 return lambda x,inc=n: x+inc
>
> if i do addn(5) it returns
>
> >>> def addn(n):
>
>                 return lambda x,inc=n: x+inc
>
> >>> addn(5)
>
> <function <lambda> at 0x01D81830>
>
> ok? so what do i write to make it actually do something. and is the
> inc=n necessary i cant do x+n?

Here are some notes I have written for our local wiki on lambdas in
python.  I hope you will find them illuminating, and I would welcome
any suggestions for improving them.

I have just cut and pasted from our wiki, so the fancy formatting has
been lost.

-----

Python lambdas.

The on-line documentation for python lambdas is not very illuminating.
Here?s my take and my first simple examples.

I would describe a lambda as a parameterised function template. If you
dig, the docs call lambdas anonymous functions not bound to a name.
There is a bit of resemblance to C macros.

Here is a simple lambda that implements an exclusive or:

>>> def XOR(x,y) :
>>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) )

(Because of the resemblance to C macros, I have been cautious and
written the lambda with lots of parentheses.)

To use this in later code, we define instances of the lambda with
specific function arguments.

>>> topping = XOR( cream, icecream)
>>> sauce = XOR( tomato, BBQ )


We now have two ?functions?, topping() and sauce() which we can use
later to test flags.

>>> cream = True
>>> icecream = False
>>> print topping()
True


So in the definition of the XOR lambda, think of x and y as the
parameters of the function template, and XOR as the function name
placeholder.

By putting in specific objects for the parameters (here the boolean
variables cream and icecream for example), we produce a specific
instance of the lambda, topping() which looks like a function with no
arguments.

If we use different objects for the parameters (say tomato and BBQ)
then we get a different function, sauce.

Here is another simple lambda, (template) to set up three new
functions AddOnly, DeleteOnly, and ReplaceOnly.

#--# Lambda function to check that a flag is only on when the other
two are off. #--#
def TFF(x,y,z) :
  return lambda : ( ( x ) and not ( y ) and not ( z ) )

AddOnly = TFF( options.AddAction, options.ReplaceAction,
options.DeleteAction )
DeleteOnly = TFF( options.DeleteAction, options.AddAction,
options.ReplaceAction )
ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
options.DeleteAction )

if( not (DeleteOnly() or AddOnly() or ReplaceOnly() ) ):
  print "Error:  Exactly one of  [ --add | --replace | --delete ]
allowed. "
  parser.print_help()
  exit


More advanced lambdas.

The examples above give function instances that have no arguments,
once the parameters of the lambda are chosen.

For a function template with arguments and parameters, we add the
arguments on the 2nd line. Parameters are in the first line.

The Gaussian distribution is exp(-(x-?)?/ 2?? ) / ?(4 ??). While we
can think of this as a function of three variables, we normally view
it as a family of functions of a single variable x, parameterised by ?
and ?. Selecting fixed values for ? and ? gives us a single
distribution for x.

>>> import math
>>> def Gaussian( mu, sigma ) :
...   return lambda x : math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
math.sqrt (2 * math.pi *sigma **2 )
...
>>>

and here are some instances:

>>> Normal = Gaussian (0, 1)
>>> HeightDistrib = (170, 20)

which we later use as

>>> y = Normal( 0.5 )
0.35206532676429952
>>> x = 192
>>> HeightDistrib(x)
0.0073381331586869951

I recommend defining the instances of the lambda right after the
lambda. If you define it in code far removed from the definition of
the lambda, it looks like an assignment, so comment it.


From tjreedy at udel.edu  Thu May  1 18:43:02 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 18:43:02 -0400
Subject: Pep11
References: <mailman.424.1209664569.12834.python-list@python.org>
	<481a068c$0$9757$9b622d9e@news.freenet.de>
Message-ID: <fvdh1h$b6c$1@ger.gmane.org>

The syllable link at the bottem is not currently working.
The site itself is still alive and distributing 2.5.1
terry





From deets at nospam.web.de  Mon May 26 15:54:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 21:54:54 +0200
Subject: Question about wsgi.input
In-Reply-To: <wwE_j.50552$7a.48515@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
	<6a0htmF35sj8eU1@mid.uni-berlin.de>
	<wwE_j.50552$7a.48515@bignews1.bellsouth.net>
Message-ID: <6a0isiF35d89iU1@mid.uni-berlin.de>

inhahe schrieb:
> That's what I would have thought, just seems strange since it seems to imply 
> that if I use StringIO or cStringIO, then whenever i write to it i have to 
> save the position, seek to the end, write, and then seek to the position i 
> saved.  Are there any other classes that are more suitable for pipes, but 
> qualify as 'file-like objects'?

Who uses StringIO for what? if you have two processes (server and 
application), you can of course use a pipe of some sort. If you write a 
WSGI-server that is supposed to pass the wsgi.input to an application, 
just use StringIO with the completely initialized data - there is no 
writing in-between.

Diez


From larzluv at hotmail.com  Sun May 11 21:02:48 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:02:48 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <bfcaef01-20fa-427a-ba3f-b09f509ef608@59g2000hsb.googlegroups.com>

After putting the magic1.dll file to C:\Program Files\Python25\DLLs
(looking at the directory structure, that seemed as good a place as
any), now I can *import* the module, but...

    >>> import magic
    >>> test = magic.Magic()
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "build\bdist.win32\egg\magic.py", line 32, in __init__
      File "build\bdist.win32\egg\magic.py", line 72, in _check_error
    magic.MagicException: could not find any magic files!

I've placed

      474,146 magic
    1,037,440 magic.mgc
       32,203 magic.mime
       45,696 magic.mime.mgc
       77,312 magic1.dll

into

    C:\windows\system32
        in Windows/System PATH
AND (simultaneously)
    C:\Program Files\python25\DLLs
        in sys.path/PYTHONPATH

(I've also tried putting copies into different dirs in both PYTHONPATH
and system PATH, to no avail.)

Obviously, magic1.dll/magic.py (et al) can't FIND the needed file(s),
but I'm not sure how to go about discerning WHERE it/they are looking
- any thought(s)/suggestion(s), anyone??


Thanks in advance!
-Larry


P.S.: Thanks, again, Michael!  ;)  - L


From python at bdurham.com  Mon May 12 20:11:06 2008
From: python at bdurham.com (python at bdurham.com)
Date: Mon, 12 May 2008 20:11:06 -0400
Subject: using PIL for good screenshots
In-Reply-To: <g0adou$1us$1@foggy.unx.sas.com>
References: <g0adou$1us$1@foggy.unx.sas.com>
Message-ID: <1210637466.13155.1252798043@webmail.messagingengine.com>

Tim,

Sounds like an interesting project.

Have you considered using SnagIt to produce your screenshots?
www.TechSmith.com/SnagIt

Malcolm


From wuwei23 at gmail.com  Tue May  6 04:46:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 6 May 2008 01:46:15 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <e0ebb932-e1e6-4006-9a1e-1373c4d0a7ee@z16g2000prn.googlegroups.com>

On May 6, 6:01 pm, Maciej Blizi?ski <maciej.blizin... at gmail.com>
wrote:
> Is there any other package that allows sending MIDI events in real
> time? Did anyone recently got any of the above packages to work?

There's MidiKinesis (http://www.sci.ccny.cuny.edu/~brinkman/software/
midikinesis/) which allows for midi events to be bound to X-Windows
events.  It looks like it achieves this using ctypes to wrap around
the ALSA libs, which may be another approach to consider. The
MidiKineses codebase would be a good place to start if you wanted to
give that a try.

I'm sorry I can't be of much more help but please keep us posted on
what you find!

- alex23




From sn at sncs.se  Tue May 27 11:26:01 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:26:01 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>

I dont want to be a new Guido. Somebody else please.

S.


On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker
>
> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> wrote:
>
> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > > seems to be needed
>
> > > He doesn't seem to care much anyway now
>
> > > Or if he cares, he have many other assignments
>
> > Who are you talking about?
>
> > > So should we try to elect a new chairman?
>
> > Chairman? Elaborate please.
>
> > > I am probably not eligible. There must be many others.!
>
> > > Do you dare?consper
>
> > Hm, are you and castrionpi twin brothers or something?
>
> > > S.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > Wbr, Andrii Mishkovskyi.
>
> > He's got a heart of a little child, and he keeps it in a jar on his desk.



From lists at cheimes.de  Fri May  2 15:41:36 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:41:36 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481B6E70.7000503@cheimes.de>

Brendan Miller schrieb:
> Hi,
> 
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.

import os
null = open(os.devnull, "wb")

:)

Christian



From Graham.Dumpleton at gmail.com  Mon May 26 00:00:31 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sun, 25 May 2008 21:00:31 -0700 (PDT)
Subject: Beginner question
References: <f4fb9b71-847b-4e71-892b-952b2e0f8e6e@w5g2000prd.googlegroups.com>
Message-ID: <3c816e91-5acb-4dd4-bfc4-164d4a2f1100@q27g2000prf.googlegroups.com>

On May 26, 4:13?am, howa <howac... at gmail.com> wrote:
> Hi,
>
> Just want to try mod_python but it is more complicated then I
> expected...
>
> I just followed the tutorial on:http://www.modpython.org/live/mod_python-2.7.8/doc-html/inst-testing....
>
> E.g.
>
> URL =http://www.example.com/mptest.py
>
> It return
>
> ImportError: No module named mptest
>
> 1. If I removed addHandler mod_python .py and PythonHandler mptest, I
> can see the SOURCE CODE
>
> 2. The PythonHandler mod_python.testhandler seems return correct
> result, showing I am using python 2.4.3
>
> any idea?

Why are you using the documentation from version 2.7.8 of mod_python
when you are using a much newer version?

Also read:

  http://www.dscpl.com.au/wiki/ModPython/Articles/GettingModPythonWorking

Graham





From gandalf at shopzeus.com  Thu May 15 09:51:29 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 15:51:29 +0200
Subject: create window on panel
In-Reply-To: <70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>	<mailman.1153.1210845280.12834.python-list@python.org>	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>	<mailman.1158.1210851928.12834.python-list@python.org>
	<70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>
Message-ID: <482C3FE1.3060700@shopzeus.com>


>> URL:http://www.daa.com.au/~james/software/pygtk/
>> /
>> /It should be easy to read the docs, view the demo programs and create
>> your own program.
>>
>> L
>>     
>
> thanks~ it seems attractive, however, I did not find much useful
> information :(
>   
http://www.pygtk.org/ -- full docs
http://packages.ubuntu.com/dapper/doc/python-gtk2-tutorial -- This seems 
to be a tutorial for python-gnome2.

Let me know if it doesn't help.

L




From bruno.desthuilliers at gmail.com  Thu May 22 15:39:17 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 22 May 2008 12:39:17 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
Message-ID: <77fa9cbd-7253-4b70-9334-b1ceac1cb15a@l64g2000hse.googlegroups.com>

On 22 mai, 18:56, Mensanator <mensana... at aol.com> wrote:
> On May 22, 10:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
>
>
>
> > Dave Parker <davepar... at flamingthunder.com> wrote:
> > >  But after getting input from children and teachers, etc, it started
> > >  feeling right.
>
> > >  For example, consider the two statements:
>
> > >       x = 8
> > >       x = 10
>
> > >  The reaction from most math teachers (and kids) was "one of those is
> > >  wrong because x can't equal 2 different things at the same time".
>
> > This is a common feature in functional languages...
>
> > Eg
>
> > Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> > [async-threads:0] [kernel-poll:false]
>
> > Eshell V5.6.2  (abort with ^G)
> > 1> X = 8.
> > 8
> > 2> X = 10.
> > ** exception error: no match of right hand side value 10
> > 3>
>
> > That error message is the erlang interpreter saying "Hey I know X is
> > 8, and you've said it is 10 - that can't be right", which is pretty
> > much what math teachers say too...
>
> Are you saying that erlang treats 1> as an assignment, yet
> treats 2> as a comparison?

Nope. Both are treated as pattern matching. The first one binds X
because it's by that time a free variable, the second fails because it
doesn't match.

> That's inconsistent.

That's consistent when you understand how Erlang works.

> No wonder nobody uses erlang.

Strange enough, it seems that more and more developpers and company
start to look at Erlang as a possible solution to massive scaling
problems.

> Why isn't erlang smart, like Python, and avoid such confusion?

Erlang *is* smart. It's just totally different from Python. And
there's no confusion here (except on your side...).



From arnodel at googlemail.com  Mon May 19 04:34:49 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 01:34:49 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<m2ve1b7msb.fsf@googlemail.com>
	<mailman.1328.1211170968.12834.python-list@python.org>
Message-ID: <6062786d-6f83-4850-bf55-4db4ec27bdea@b1g2000hsg.googlegroups.com>

On May 19, 5:22 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Arnaud Delobelle" <arno... at googlemail.com> wrote in message
[...]
> | Note that the same thing can be said about generator expressions,
> | which are nothing more than anonymous, non-reusable, generator
> | functions.
>
> Right.  So if someone posted on genexp confusion, I would suggest
> 'write a full generator function'.

I was just arguing against arguing for the removal of lambda on the
basis that it doesn't add any functionality to the language!

> | Instead these were _added_ to the language!
>
> As a convenience.
> Actually, if one uses more that one for-clause in a generator expression,
> there is a potential gotcha in relation to name capture.  So if that bites,
> the genexp is not so much a convenience, and one might better write
> the full function.
>
> tjr

Yes, IMHO this is a bug, and I wish I had the time to dive into the
code to see if I can fix it.

--
Arnaud


From darcy at druid.net  Wed May 21 13:25:10 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 21 May 2008 13:25:10 -0400
Subject: Unsubscribe request
In-Reply-To: <20080521131911.9d3b2056.darcy@PyGreSQL.org>
References: <338512.44068.qm@web39704.mail.mud.yahoo.com>
	<20080521131911.9d3b2056.darcy@PyGreSQL.org>
Message-ID: <20080521132510.af959b7b.darcy@druid.net>

On Wed, 21 May 2008 13:19:11 -0400
"D'Arcy J.M. Cain" <darcy at PyGreSQL.org> wrote:
> On Wed, 21 May 2008 09:21:05 -0700 (PDT)
> ahmed khattab <ahmed_kh1987 at yahoo.com> wrote:
> > unsubscribe me form python list plz
> 
> Please use the admin interface that you used when you subscribed:
> 
> http://mail.python.org/mailman/listinfo/python-list

Oops.  I thought I was replying to a different list that I admin.
Sorry for the noise.

However, the advice was still correct.  Don't send unsubscribe requests
to the list.  This is true of pretty much every list, not just this one.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From dullrich at sprynet.com  Sun May 25 07:54:51 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 25 May 2008 06:54:51 -0500
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
Message-ID: <loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>

On Sun, 25 May 2008 03:32:30 -0700 (PDT), ulrich at dorda.net wrote:

>Thanks for the reply,
>
>Of course the suggested solution is working and good, but a bit
>complicated. The module/function where i need to access the variable
>value from the interactive shell is burried quite deep and I would
>nedd to hand the locals() quite often from one module to another.
>Furthermore it makes the call function slightly more complicated, as
>the locals()-argunment has to be given every time.
>
>I was hoping for something a bit different: If I wanted to access a
>value b from another module "utest2.py", I would simply need to type
>in utest.py: import utest2; print 2*utest2.b
>Isn't there a name for the interactive namespace (like here the
>utest2), which I can use to access the variable without handing the
>whole dictionary?

"""utest.py"""

import __main__

def doit():
  print 2*__main__.a

>Cheers,
>
>Ulrich
>
>

David C. Ullrich


From stef.mientki at gmail.com  Mon May  5 18:25:33 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Tue, 06 May 2008 00:25:33 +0200
Subject: Browser + local Python-based web server vs. wxPython
In-Reply-To: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
References: <mailman.588.1209997391.12834.python-list@python.org>
	<bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
Message-ID: <481F895D.9050905@gmail.com>

Mike Driscoll wrote:
> On May 5, 9:22 am, pyt... at bdurham.com wrote:
>   
>> I'm looking at rewriting some legacy VB applications and am pondering
>> which of the following techniques to use:
>>
>> 1. Browser based GUI with local web server (Browser +
>> wsgiref.simple_server) (I'm assuming that simple_server is class I want
>> to build from for a local web server)
>>
>> -OR-
>>
>> 2. wxPython based GUI
>>
>> My thought is that a browser/local web server setup may be more portable
>> to mobile environments than wxPython and may offer a way to scale a
>> single user offline application to a multi-user online application using
>> a remote vs. local web server. Some groups of users may feel more
>> comfortable with a browser based interface as well.
>>
>> I'm looking for feedback from anyone that has pondered the same question
>> as well as any pros/cons or tips from anyone that has chosen the
>> browser/lcoal web server route.
>>
>> Thanks,
>>
>> Malcolm
>>     
>
> wxPython is great for desktop applications on Linux, Windows and Mac.
> However, there isn't much support for it on mobile platforms at the
> moment. If you're thinking your application will be mostly for mobile
> environments,
I've been looking for several months now for a way to program mobile 
devices,
and indeed as Mike said, wxPython has not much support so I didn't dare 
to try it.
A week ago I found PocketPyGui,
which is well supported, rock stable and qua functionality quit similar 
to wxPython
and in some aspects even much easier than wxPython.
The only disadavantage is that it's only suited for windows mobile.
To give an idea, how well it works:
in a week of spare time, I build an application with about 20 screens,
build an emulator for it in wxPython ( not completely finished),
and I now consider to build a wxPython wrapper (so I only have to know 1 
kind of syntax)

cheers,
Stef



From mensanator at aol.com  Fri May 16 13:27:44 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 16 May 2008 10:27:44 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <6ed4b0ff-5411-4384-b97d-e39667beb955@c65g2000hsa.googlegroups.com>

On May 16, 11:24?am, "inhahe" <inh... at gmail.com> wrote:
> "D'Arcy J.M. Cain" <da... at druid.net> wrote in messagenews:mailman.1232.1210952591.12834.python-list at python.org...
>
>
>
> > 2. Once the code is functioning, benchmark it and find the
> > bottlenecks. ?Replace the problem methods with a C extension. ?Refactor
> > (and check your unit tests again) if needed to break out the problem
> > areas into as small a piece as possible.
>
> There's probably only 2 or 3 basic algorithms that will need to have all
> that speed.
>
>
>
> > 3. ?If it is still slow, embed some assembler where it is slowing down.
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.
> Although it's true I'd only have to embed it for one system to see (more or
> less).
>
>
>
> >> For portability, I'd simply write different asm routines for different
> >> systems. ?How wide a variety of systems I'd support I don't know. ?As a
> >> bare
> >> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms
> >> of
> >> SIMD.
>
> > Even on the same processor you may have different assemblers depending
> > on the OS.
>
> yeah I don't know much about that, ?I was figuring perhaps I could limit the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows. ? also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.

The Society for Inherited Metabolic Disorders?

Why wouldn't the compilers support it? It's part of the x86
architexture,
isn't it?


From saluk64007 at gmail.com  Wed May 28 01:07:10 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Tue, 27 May 2008 22:07:10 -0700
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
Message-ID: <c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>

I don't know if this will go through (my posts seem to have become blocked
lately), but I'll give it a shot anyhow.

You seem to be under a misconception that a python list is similar to a list
in say, Java or other languages that have a rigid idea of variables and
types.  In python, a list is a list of objects - any type of object can be
stored in a list.  Just as you don't declare types for variables, you also
don't declare types for lists.  Here is your modified code:

class Event():
   def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
clrTime=""):
     self.cameraEventType = cameraEventType
     self.zone = zone
     self.setDay = setDay
     self.setTime = setTime
     self.clrTime = clrTime

class EventTimeFilter:
   def __init__(self):
           self.event = []  #Create an empty list, bind to the name "event"
under the "self" namespace
           self.event.append(Event())   #Create an event object and append
to the end of the list


Python won't stop you from putting other objects into self.event besides
Event objects, but in practice this isn't often an issue.  The real benefit,
is if you subclass event or make some other type of object that is similar
to events, with maybe some of the same fields, you can still store them in
the list and it will play along with the rest of your code.
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From pydev at rscorp.ab.ca  Thu May  1 11:00:02 2008
From: pydev at rscorp.ab.ca (Scott SA)
Date: Thu,  1 May 2008 09:00:02 -0600
Subject: Photo gallery software
Message-ID: <r02010500-1049-47677F73178F11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Jumping Arne (arnlen at mac.com) wrote:

>I've searching for some software that would allow me to present my photos on 
>the web (I'm not interested a software that generates static pages that I 
>upload) and there are quite a few, see for example 
><http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
>haven't managed to find one that I like - Gallery 2 is close.
>
>So I've started to see if there is one that is based python (PHP isn't really 
>"my language") but when I search on Google almost the only thing I find are 
>photo galleries of snakes (to be honest I didn't know that people were *that* 
>interested in pythons).
>
>Do any anyone know if there exists photo gallery software written in Python?
>
>I've found
><http://www.amk.ca/python/code/gallery>
><http://www.developer.com/lang/other/article.php/3734416>

I've been working with Photologue for a while with some nice results.
    <http://code.google.com/p/django-photologue/>

It is a Django project 
    <http://www.djangoproject.com/>,

It includes support for tagging:
    <http://code.google.com/p/django-tagging/> 

It easily allows configuration of different image sizes and integrates with generic templates providing gallery and detail view support. 

HTH

Scott


From irmen.NOSPAM at xs4all.nl  Mon May 19 14:25:11 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 20:25:11 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <mailman.1335.1211187990.12834.python-list@python.org>
References: <mailman.1216.1210933005.12834.python-list@python.org>	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
	<mailman.1335.1211187990.12834.python-list@python.org>
Message-ID: <4831c608$0$14361$e4fe514c@news.xs4all.nl>


Laszlo Nagy wrote:
> 
>> It is possible to change the serialization used by Pyro
>>
>>   http://pyro.sourceforge.net/manual/9-security.html#pickle
>>
>> to the the 'gnosis' XML Pickler.
>>   
> As I said earlier, I would not use XML. Just an example - I need to be 
> able to transfer image files, word and excel documents. How silly it 
> would be to base64encode a binary file, then put it into an XML.
> 
>  L
> 

Fair enough.

In that case, here's 5 suggestions:

- use simple file copying from a mounted network drive
- use http (web server)
- use ftp
- use scp
- use rsync

Why wouldn't one of these work for you? Did I miss something in your original 
requirements? All of the above high level protocols are very efficient in concurrently 
transferring files from a server to multiple clients.

--irmen


From pavlovevidence at gmail.com  Tue May  6 16:02:12 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 6 May 2008 13:02:12 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <316b2772-576e-49ba-a368-e78c8930a07e@b1g2000hsg.googlegroups.com>

On May 6, 1:22 pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> Excuse the long post.
>
> Ben Finney <bignose+hates-s... at benfinney.id.au> writes:
> >> I guess it's safe to assume that you are not opposed to using code
> >> based on more liberal license, right? :-)
>
> > I'm less inclined to base work on, or contribute to, a work under a
> > non-copyleft license, because I have less assurance that the code will
> > remain free for all recipients.
>
> In practice, the probability of hijacking of source code by an evil
> corporation is very low for most projects. And even when it did
> happen, the evil corporation would likely submit patches.

The Wine project changed from MIT (I think) to LGPL because evil
corporations were hijacking its source code and not submitting
patches.  It happens.


Carl Banks


From iqbaltalaat at gmail.com  Fri May 16 14:53:33 2008
From: iqbaltalaat at gmail.com (I-T)
Date: Fri, 16 May 2008 11:53:33 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
Message-ID: <28ab4221-d494-4ae1-ab6f-d2f596e23d27@j22g2000hsf.googlegroups.com>

Open the file inside your script in append mode.

open('filename', 'wa')


On May 16, 11:41?pm, globalrev <skanem... at yahoo.se> wrote:
> i ahve a program that takes certain textsnippets out of one file and
> inserts them into another.
>
> problem is it jsut overwrites the first riow every time.
>
> i want to insert every new piece of text into the next row.
> so:
> 1. how do i write to a new line every time i write to the file?
>
> 2. if i dont want to write to a new line but just want to insert it
> after the last token in the file, how do i do then?



From castironpi at gmail.com  Wed May 14 13:01:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:01:40 -0700 (PDT)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
Message-ID: <f0312987-5aba-4c1d-8fcc-354e59cf5b5c@i76g2000hsf.googlegroups.com>

On May 14, 11:58?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Duncan Booth" <duncan.bo... at invalid.invalid> wrote in message
>
> news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
> | I also recommend Gmane which provides a free news server for most mailing
> | lists: mailing lists are a lot more manageable when gatewayed into a news
> | server. If you just want to access comp.lang.python I think you'll find
> the
> | mailing list to which it is connected is available for free on Gmane.
>
> gmane.comp.python.general
>
> which is where I am answering this from. ?Works great.

Love them opticals.


From swapsun at gmail.com  Wed May  7 09:01:55 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 06:01:55 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
	<68dm40F2rekquU1@mid.uni-berlin.de>
Message-ID: <b940f127-2225-4043-86f7-a3b6cd06cb6e@u36g2000prf.googlegroups.com>

On May 7, 8:36?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> swap... at gmail.com wrote:
> > Any idea why the following program does not work? I was learning IO on
> > Python and the following generates a TypeError: range() integer end
> > argument expected, got str.
> > I am a beginner.
>
> Because raw_input does return you as string which you need explicitly
> convert to a number, e.g. doing
>
> i = int(input)
>
> Diez

Thank you, Diez!


From exarkun at divmod.com  Fri May  2 15:53:59 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 2 May 2008 15:53:59 -0400
Subject: Non-blocking connect
In-Reply-To: <roy-1A07DD.14384602052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <20080502195359.6859.299919246.divmod.quotient.58224@ohm>

On Fri, 02 May 2008 14:38:47 -0400, Roy Smith <roy at panix.com> wrote:
>In article
><1029ba0a-74e0-41d3-8397-7e326f4611bf at a9g2000prl.googlegroups.com>,
> mp <mailpitches at email.com> wrote:
>
>> Thanks Roy. I was just trying to understand someone else's code, but
>> in the end it turns out that this was just a bug.
>>
>> What weirded me out was how injecting a print statement preventing the
>> error from occurring, but now I get it. Without blocking, the
>> connection handshake occurs in parallel after the connect_exc method
>> is called. In my example, my processor reaches the send call before
>> the connection manages to complete in the background. However, if you
>> stick in a print statement after the connect_exc call and before the
>> send call, it delays processing just long enough for the connection to
>> complete, thus no exception is thrown by the send call.
>
>I don't really understand that last part.  There shouldn't be any
>background processing going on, unless there's a lot more code than you
>showed.
>
>The three-way handshake *can't* happen in the background, because
>connect_ex() has no way to know what value to return until the handshake is
>completed.  Let's say I send a SYN, and 15 seconds later, you send a RST
>(indicating that the connection has been refused).  The connect_ex() call
>has to have waited the 15 seconds for this to happen so it knows to return
>an appropriate error code.
>
>I do not understand why sticking a print statement in there should make any
>difference.

The background processing is going on in the kernel, where the TCP/IP
implementation is.  After userspace has indicated the desire to establish
a connection, the kernel doesn't need any further input in order to set
up that connection.  So non-blocking connect_ex starts the process and the
process will complete on its own (successfully or with an error) without
any further socket calls from the userspace application.

The right way to know when the connect attempt has actually completed
(successfully or with an error) is to use a mechanism like select() to
check for writeability.  Once the socket is writeable, if it has a 0
SO_ERROR, the connection was successful, otherwise it failed.

Jean-Paul


From sjmachin at lexicon.net  Sat May 10 17:05:31 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 14:05:31 -0700 (PDT)
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <0541dfbd-e11f-45c1-8a36-33b205eb15dd@w34g2000prm.googlegroups.com>

On May 11, 6:59 am, wxPytho... at gmail.com wrote:
> If you are in the interactive prompt of the Python interpreter and you
> do this
>
> print """Testing\"""   or   print '''Testing\'''
>
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
>
> [1]+  Stopped                 python
>
> If you do
>
> print "Testing\"   or   print 'Testing\'
>
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?

No. This might clue you in:

>>> print """Testing\""""
Testing"
>>>

Cheers,
John


From vivainio at gmail.com  Wed May  7 13:48:27 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 07 May 2008 17:48:27 GMT
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
Message-ID: <3aoudmza.fsf@gmail.com>

Paul Boddie <paul at boddie.org.uk> writes:


> original licence as well. Now, I did leave a fair amount of
> information about the heritage of the code, so that anyone who is
> scared of the LGPL could just go and get the original work, but that

I doubt anyone is really afraid of LGPL. The only problem with LGPL is
that of static vs. dynamic linking, and that is only a problem in
platforms without dynamic linker (rarity these days).


> You can almost never just "grab the code from somewhere without having
> to think about [the] license" since even permissive licences typically
> have a list of conditions that must be observed. Certainly, they

Yeah, but you don't have to "worry" about license - just have the
license text in source code, or a text file in binary distribution.


From castironpi at gmail.com  Tue May 20 09:40:26 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:40:26 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<ed2fbf6e-346e-48dd-b205-950e5e039ab2@s50g2000hsb.googlegroups.com>
Message-ID: <ccfd1d96-3a18-49e1-ab80-63d8efdc34fb@k37g2000hsf.googlegroups.com>

On May 20, 7:56?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
>
>
>
>
>
> > Hello,
>
> > I'm getting into Python now after years of Perl, and as part of my
> > research I must understand how to do some common tasks I need.
>
> > I have a bunch of Windows PCs at work to which I want to distribute an
> > application I've developed on my PC. All these PCs have Python 2.5
> > installed.
>
> > If my application contains only code I've developed, I simply zip its
> > directory with .py files and send it to everyone, who can then use it
> > by running the entry-point .py file. However, what if I've installed
> > some 3rd party modules on my PC, and my application uses them (for
> > example pyparsing, PiYAML and some others) ? I don't want to manually
> > install all these packages (there may be dozens of them) on all those
> > PCs (there may be dozens of those too). What is the best method I can
> > use ? Naturally, I want all the non-standard packages my app uses to
> > be detected automatically and collected into some kind of convenient
> > distributable that is easy to pass around and run.
>
> > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > executables, and I don't want to distribute those all the time. I much
> > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > Thanks in advance,
> > Eli
>
> One way I forgot to mention is to put Python on the network (i.e. the
> intranet). We do that here at work and I can develop my applications
> on my machine and then put them on there for anyone to use. That way
> they never have to install Python, let alone the bother of installing
> dependencies.
>
> Mike- Hide quoted text -
>
> - Show quoted text -

Impossible and Useless here:

I assert there's no way to generate the list.

a= raw_input( )
if a== 'something unknown':
  b= 'imp'
  b+= 'ort '
  b+= 'os'
  exec( b )


From danb_83 at yahoo.com  Thu May 22 01:00:30 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Wed, 21 May 2008 22:00:30 -0700 (PDT)
Subject: related to python
References: <mailman.1461.1211424054.12834.python-list@python.org>
Message-ID: <a2688cf1-a70d-4ca2-840e-568be008caf8@8g2000hse.googlegroups.com>

On May 21, 9:34?pm, "salil_reeves" <salil_ree... at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');
> 2. stripping away any leading and trailing blank spaces; and
> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.
> how it is done ??
> can anyone help me with it

Yes, but I'm only as willing to put as much effort into my answer as
you do into your thread titles.

help(str)


From duncan.booth at invalid.invalid  Wed May  7 08:31:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 12:31:19 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
Message-ID: <Xns9A97897C78229duncanbooth@127.0.0.1>

Marco Mariani <marco at sferacarta.com> wrote:

> Duncan Booth wrote:
> 
>> It does this:
>> 
>>>>> @greedy
>> def getCommandsFromUser():
>>      while True:
>>           yield raw_input('Command?')
>> 
>>           
>>>>> for cmd in getCommandsFromUser():
>>      print "that was command", cmd
>> 
>>      
>> Command?hello
>> Command?goodbye
>> that was command hello
>> Command?wtf
>> that was command goodbye
>> Command?
> 
> 
> Not here..
> 
> 
> In [7]: def getCommandsFromUser():
>          while True:
>                  yield raw_input('Command?')
>     ...:
>     ...:
> 
> In [10]: for cmd in getCommandsFromUser(): print "that was command", 
cmd
>     ....:
> Command?hi
> that was command hi
> Command?there
> that was command there
> Command?wuwuwuw
> that was command wuwuwuw
> Command?
> 

Perhaps if you'd copied all of my code (including the decorator that was 
the whole point of it)...



From ricaraoz at gmail.com  Thu May  8 13:11:00 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 08 May 2008 14:11:00 -0300
Subject: python vs. grep
In-Reply-To: <b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
Message-ID: <48233424.1010202@bigfoot.com>

Anton Slesarev wrote:
> I try to save my time not cpu cycles)
> 
> I've got file which I really need to parse:
> -rw-rw-r--  1 xxx  xxx  3381564736 May  7 09:29 bigfile
> 
> That's my results:
> 
> $ time grep "python" bigfile | wc -l
>     2470
> 
> real    0m4.744s
> user    0m2.441s
> sys     0m2.307s
> 
> And python scripts:
> 
> import sys
> 
> if len(sys.argv) != 3:
>    print 'grep.py <pattern> <file>'
>    sys.exit(1)
> 
> f = open(sys.argv[2],'r')
> 
> print ''.join((line for line in f if sys.argv[1] in line)),
> 
> $ time python grep.py "python" bigfile | wc -l
>     2470
> 
> real    0m37.225s
> user    0m34.215s
> sys     0m3.009s
> 
> Second script:
> 
> import sys
> 
> if len(sys.argv) != 3:
>    print 'grepwc.py <pattern> <file>'
>    sys.exit(1)
> 
> f = open(sys.argv[2],'r',100000000)
> 
> print sum((1 for line in f if sys.argv[1] in line)),
> 
> 
> time python grepwc.py "python" bigfile
> 2470
> 
> real    0m39.357s
> user    0m34.410s
> sys     0m4.491s
> 
> 40 sec and 5. This is really sad...
> 
> That was on freeBSD.
> 
> 
> 
> On windows cygwin.
> 
> Size of bigfile is ~50 mb
> 
> $ time grep "python" bigfile | wc -l
> 51
> 
> real    0m0.196s
> user    0m0.169s
> sys     0m0.046s
> 
> $ time python grepwc.py "python" bigfile
> 51
> 
> real    0m25.485s
> user    0m2.733s
> sys     0m0.375s
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


All these examples assume your regular expression will not span multiple 
lines, but this can easily be the case. How would you process the file 
with regular expressions that span multiple lines?







From gagsl-py2 at yahoo.com.ar  Tue May 13 06:42:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:42:03 -0300
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <op.ua29cdxkx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:25:06 -0300, <wxPythoner at gmail.com> escribi?:

> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?

Uh... where do you get your (mis)information about 3.0?
See http://docs.python.org/dev/3.0/whatsnew/3.0.html

-- 
Gabriel Genellina



From ulrich at dorda.net  Sun May 25 05:47:55 2008
From: ulrich at dorda.net (Ulrich Dorda)
Date: Sun, 25 May 2008 11:47:55 +0200
Subject: access interactive namespace from module (shared namespace?)
Message-ID: <483935CB.6050901@dorda.net>

I've got a probably embarrassing trivial problem with namespaces, but couldn't solve it 
myself nor find an answer in the net. Hopefully one of you guys can help me.

What I want to do:
Use the interactive shell and e.g define the variable a there.
Then load a module and access a from within.

e.g file "utest.py"

def doit():
	print 2*a

in the shell:

import utest
a=3
utest.doit()  <- I want this to print 2*a, but of course obtain: <type 
exceptions.NameError'>: global name 'a' is not defined

Any change I do to a in the shell should be seen from the doit() function, any variable 
assignment I do in the doit() function should be seen in the shell. I guess it's somehow a 
namespace sharing.

Actually the function doit() will contain an eval() function that should evaluate a (via a 
gui) dynamically inserted expression.

Any one got a clue? (a clue what I try to say and how to help?!)

Thanks a lot in advance!!

Ulrich




From jstucklex at attglobal.net  Sun May 25 21:41:09 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 21:41:09 -0400
Subject: php vs python
In-Reply-To: <g1d3lf$1rpd$3@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
	<g1d3lf$1rpd$3@news.mtu.ru>
Message-ID: <bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 20:53:28 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> Jerry Stuckle wrote:
>>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>>>
>>> Ivan
>> Not for a good programmer it isn't.  I've known a few good programmers
>> in my 40+ years of programming.  I've known a lot more poor programmers
>> who think they're good.
> 
> I can't argue with your experience. I don't think that I'm good 
> programmer. I want to be better. And I hope that when I'll have 48+ years 
> experience I won't have to use it as argumentum ad hominem.

No ad hominems on my part.  I said nothing about you or your abilities. 
  I spoke only of programmers I have known, both good and poor.

The the good programmers are able to adapt to the language and make the 
most of whatever language they're using.  The result is good code. 
OTOH, poor programmers I have known have found all kinds of excuses - 
from the language itself to lack of requirements, to anything else they 
can blame, except the real root of the problem.

If you take exception to that, then I'm sorry for you.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From dullrich at sprynet.com  Mon May 19 07:29:18 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 19 May 2008 06:29:18 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
Message-ID: <7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>

On Sun, 18 May 2008 18:18:34 +0200, pataphor <pataphor at gmail.com>
wrote:

>In article <dtb03495i4isn8oi89i8fpe7p8dif7cct6 at 4ax.com>, 
>dullrich at sprynet.com says...
>
>> Is there some reason that would be better? It would make a lot
>> of the code more complicated. Ok, it would require only one
>> bit of added code, I suppose, but I don't see the plus side.
>
>The plus side is you give up an untenable position :-) 

Maybe you could be more specific? Various "positions" I've
taken in all this may well be untenable, but I can't think
of any that have anything to do with whether the data should
be a single list instead of a list of lists.

(The only way I can parse this to make it relevant is to
assume that the position you're referring to is that a
list of lists is better than a single list. If so: First, I
haven't said that it was. Second, saying "B is untenable"
is not much of an answer when someone asks why you
say A is better than B.)

>And to address an 
>item in a matrix costs two lookups, row and column, while an array needs 
>only one. 

The phrase "premature optimization" springs to mind.

This is _Python_ we're talking about. Supposing you're right that
doing two lookups _in Python_ is faster than doing one lookup
plus the calculuation col + row*width _in Python_, it can't
make enough difference to matter. In the sort of application I
have in mind things already happen "instantaneously".

The point is not to improve on NumPy. Trying to improve on
NumPy in pure Python code would be silly - if I wanted
optimized large matrices I'd _use_ NumPy. The point is just
to give a simple "intuitive" way to manipulate rows and
columns in small matrices. 

So I'm not looking ahead to the future, things are not
scalable? The thing is not _supposed_ to scale up to
large matricies. If a person were dealing with large
matricies then almost all of it would need to be
rewritten (and if a person were dealing with really
large matrices then trying to do the thing in pure
Python would be silly in the first place, and insisting
on being able to write things like "m.row[0] =
m.row[1] + m.row[2]" could very well be a totally
wrong approach to begin with - I'd figure out the
operations I expected to need to do and write functions
to do them.)

Really. In one of the intended applications the matrix
entries are going to be home-made Rationals. Just
adding two of those guys takes a long time. It's
still more than fast enough for the intended application,
but [oh, never mind.

Sorry about the argumentative tone - I _would_ like
to know which "untenable position" you're referring to...

>P.

David C. Ullrich


From Lie.1296 at gmail.com  Fri May 30 05:39:20 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 30 May 2008 02:39:20 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <5c5744cb-d801-48aa-b34d-c03c036d4885@w8g2000prd.googlegroups.com>

On May 24, 5:59?am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> ? ? ? ? printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> ? ? ? ? print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?
>
> Thanks a lot,
> Johannes

Python often tries to avoid things it considers "bad design" in a
language, "assignment and comparison" is, for example, a bad design
because it is easily mistaken with "equality comparison", among other
things. This avoidance of bad design sometimes go as far as making
"the way" to do something in python completely different than doing
the same thing in other languages, thus it is always a good idea to
state what you intent in doing, rather than stating what you think you
need to do. An example is python's notion for 'for' loop, which can
only loop a list, most people coming from other languages would use
range/xrange here and there, a pythonic code would only rarely use a
range/xrange (usually in situations where the number of repetition is
constant).

Try reasking by stating what you wanted to do, rather than the
abstract question that states what you think you need to do you've
just asked. What functions you wanted to use and for what?


From castironpi at gmail.com  Wed May 14 08:50:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 05:50:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
	<mailman.1115.1210762408.12834.python-list@python.org>
Message-ID: <31f96940-b658-48ed-9227-29c2d4826acf@d1g2000hsg.googlegroups.com>

On May 14, 5:53?am, "J. Clifford Dyer" <j... at sdf.lonestar.org> wrote:
> On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
> > > You sound like a commercial.
>
> > Get Flaming Thunder for only $19.95! ?It slices, it dices!
>
> > > And while programs and libraries written in assembly may be twice as fast
> > > as programs and libraries written in C, ...
>
> > It's a myth that they're only twice as fast. ?An experienced assembly
> > language programmer can usually get out at least a factor of 5 by
> > using tricks such as cache-coherence, carry flag tricks, stack
> > manipulations, etc.
>
> > > ... they're real hell to maintain.
>
> > That's also a myth. ?For example, if C is easy to maintain, why is
> > Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> > the world? ?There should be lots of single-asset 8-by-8 shotgun cross
> > compilers written in C, if C is easier to maintain.
>
> Not only is it the world's only "single-asset 8-by-8 shotgun cross
> compiler," but according to google, it's also the world's only "shotgun
> cross compiler" period. ?But I guess if you make up your own terminology
> you're bound to be unique. ?:) ?Do you mind if I ask: what exactly is a
> single-asset 8x8 shotgun cross compiler, and what makes that of any
> value to me?
>
> Cheers,
> Cliff- Hide quoted text -
>
> - Show quoted text -

You can examine those criteria by trying to buy a chair.  Is Tron good
practice for Opticals?  Who wants a memory lane crossing?  Is
compiling bad?


From bignose+hates-spam at benfinney.id.au  Thu May  1 23:24:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 13:24:01 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <87abj91j8u.fsf@benfinney.id.au>

Yves Dorfsman <yves at zioup.com> writes:

> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python

You haven't indicated your understanding of what the difference in
meaning is, so I'll explain it for those who might not know.

The shebang line (the initial line of the file beginning with "#!")
takes advantage of OS kernels that determine how to execute a file
based on the first few bytes of the file. The shebang line tells the
kernel that this file should be executed by passing it as input to
a process started by another command.

The specified command takes the form of a fully-qualified file path,
and zero or one arguments to the program. That command is then
executed by the kernel, and the Python program file is passed as input
to the resulting process.

The difference between the two is thus what command is executed to
interpret the Python program.

* "#! /usr/bin/env python" will run the command "/usr/bin/env python".
  The 'env(1)' manual page says its purpose is to "run a program in a
  modified environment", but it also has the effect that the command
  is searched on the current PATH variable, and executed based on the
  first occurrence.

* "#! /usr/bin/python" will run the command "/usr/bin/python", which
  is of course the system Python instance as installed by most OS
  packaging systems. That command is run, and the result is the Python
  interpreter.

> Why is one preferred over the other one ?

I've never clearly understood why people want to use "#! /usr/bin/env
python", which is prone to finding a different Python from the one
installed by the operating system. I'd be interested to see what
responses are in favour of it, and what the reasoning is.

One possible reason is that the programmer is attempting to allow for
systems where Python has been installed, but not from an operating
system package.

I much prefer "#! /usr/bin/python" because I want my Python programs
to, by default, be run with the default Python, and depend on Python
being installed by the operating system's package manager. On systems
that use shebang lines and that actually have standardised filesystem
locations, the default Python is found at '/usr/bin/python'.

-- 
 \          "Any sufficiently advanced bug is indistinguishable from a |
  `\                                          feature." ?Rich Kulawiec |
_o__)                                                                  |
Ben Finney


From geoldr at gmail.com  Thu May 22 15:32:25 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 12:32:25 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com> 
	<26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com> 
	<a71352c3-a9db-41ac-a176-1bd9645b006e@x41g2000hsb.googlegroups.com>
Message-ID: <1fafb41e-4bf4-495d-ad81-12aa1e431c9a@w5g2000prd.googlegroups.com>

On May 22, 11:58?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 1:38?pm, Geoldr <geo... at gmail.com> wrote:
>
>
>
> > On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
>
> > > On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > > > Hello all, I have written a simple program, and at the end of it,
> > > > instead of it closing I would like it to restart from the beggining.
> > > > Is there a way to do this? Put my code into a class function, or
> > > > something?
> > > > I guess I could do a while loop, but I think if there is a way to run
> > > > my code if it's in a class would be an easier option. I can't seem to
> > > > find many guides online but maybe I have not been looking in the right
> > > > places.
>
> > > > Anybody have any ideas?
>
> > > Putting your code in a function or class is probably the way to go.
> > > When I was doing C++, we'd just use a while loop for simple stuff,
> > > though.
>
> > > It really shouldn't be all that hard to tell the code to call up the
> > > beginning of the program again.
>
> > > Mike
>
> > That's what I am trying to figure out, but it doesn't seem to work. Do
> > you have any example code of classes/functions that work for you?
>
> No...but I through some concept code together that does the basics:
>
> <code>
>
> def repeater():
>
> ? ? for i in range(10):
> ? ? ? ? print i
>
> def main():
> ? ? ret = 'Y'
> ? ? while 1:
> ? ? ? ? if ret.upper() == 'Y':
> ? ? ? ? ? ? repeater()
> ? ? ? ? else:
> ? ? ? ? ? ? print 'Program finished...goodbye!'
> ? ? ? ? ? ? break
> ? ? ? ? ret = raw_input('Do you want to continue? (Y/N)')
>
> if __name__ == '__main__':
> ? ? main()
>
> </code>
>
> I found that using the while was the easiest to create on short
> notice. You could probably do it with recursion too, but I'm not
> especially good at that.
>
> Another idea is to have some kind of sentinel value that both
> functions can access and use it somehow to tell whether or not to
> repeat.
>
> Hope that helps you get going.
>
> Mike

Thank you, the "def" option works the best.


From onsen-neko at gmx.net  Thu May  8 03:05:49 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Thu, 8 May 2008 09:05:49 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805071639.30414.kyrie@uh.cu>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
	<200805071639.30414.kyrie@uh.cu>
Message-ID: <200805080905.49342.onsen-neko@gmx.net>

Am Mittwoch 07 Mai 2008 22:39:30 schrieb Luis Zarrabeitia:

> There you have it, interfaces are not enough to ensure that the
> implementors actually implement the methods. They are useful for
> warning at compile time if there is a missing method, but nothing
> more. 

It's not the fault of the enviroment, if the coder is to stupid to use 
it the right way.

> I believe you could achieve a very similar warning in python 
> using some kind of Interface metaclass (too lazy right now to hack a
> proof of concept, but it looks doable).

Of course. And unlike Javas interfaces, it ensure a more dynamic 
coding-style, without great tools which check all the time for correct 
behaviour.


From http  Fri May  2 16:14:37 2008
From: http (Paul Rubin)
Date: 02 May 2008 13:14:37 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com> <7xbq3pjhav.fsf@ruckus.brouhaha.com>
	<87bq3pglkf.fsf@mulj.homelinux.net>
Message-ID: <7xr6ckfope.fsf@ruckus.brouhaha.com>

Hrvoje Niksic <hniksic at xemacs.org> writes:
> Since the += operator is not compiled into a single bytecode
> instruction, it needs the lock.

Aha, you are right.  What I was remembering is that xrange.next
is atomic in CPython, i.e. you can say something like

    counter = xrange(10000)
    
and then

   a = counter.next()

doesn't need a lock.  I am personally squeamish about relying on things
like this but apparently it is a standard idiom.  I will guess, but 
I haven't checked and I don't remember hearing, that itertools.count()
also works like that.


From michael at stroeder.com  Mon May  5 03:35:10 2008
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Mon, 05 May 2008 09:35:10 +0200
Subject: config files in python
In-Reply-To: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <eup2f5-6r9.ln1@nb2.stroeder.com>

sandipm wrote:
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
> 
> import conf
> print conf.SomeVariable
> 
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.

reload(conf)

http://docs.python.org/lib/built-in-funcs.html#l2h-61

But you should carefully consider what updating the configuration means 
in your application.

Ciao, Michael.


From marco at sferacarta.com  Wed May  7 08:28:06 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:28:06 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <9chUj.34561$o06.23748@tornado.fastwebnet.it>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
Message-ID: <tfhUj.34565$o06.16834@tornado.fastwebnet.it>

Marco Mariani wrote:

> Not here..

Oh, sorry, I obviously didn't see the @greedy decorator amongst all the 
quoting levels.

Anyway, the idea doesn't make much sense to me :)


From grayaii at gmail.com  Wed May  7 16:25:49 2008
From: grayaii at gmail.com (grayaii)
Date: Wed, 7 May 2008 13:25:49 -0700 (PDT)
Subject: subprocess wait() waits forever, but os.system returns
Message-ID: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>

There are so many threads on this subject, but I ran across a
situation on Windows that I can't figure out.

I'm trying to run this little command-line exe and when I launch like
this, it hangs:

>>> import subprocess
>>> command = r'c:\mydir\foo.exe'
>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>> returncode = run.wait()  ## HANGS HERE ##

I can run this exe manually via the command prompt and it returns
after a few seconds, but more importantly when I run it as follows it
works fine:

>>> import os
>>> command = r'c:\mydir\foo.exe'
>>> os.system(command)  ## WORKS FINE! ##

Unfortunately I don't know too much about the exe (well, I do know
that it spits out some stdout that I collect, but I don't know the
exe's source code.)

I can't figure out why the subprocess module is having a hard time
with this particular exe.  I've tried so many different permutations
of subprocess.Popen and they all hang on this exe.  Even if try to do
the usual (pseudo code):
while(returncode is None):
    returncode = run.poll()
    time.sleep(1)
    blah blah blah

returncode is always None... In other words, it's hung.  I can't
figure out why os.system works fine, but subprocess.Popen thinks the
process hasn't finished.

Any ideas would be greatly appreciated.  I'm all ears.


From vginer at gmail.com  Mon May 19 14:01:14 2008
From: vginer at gmail.com (Vicent Giner)
Date: Mon, 19 May 2008 11:01:14 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>
Message-ID: <f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>

Thank you very much for all the answers I've got.

As far as I have understood, Python can be a good alternative, or, at
least, a reasonable choice.

I intend to design new algorithms for a kind of Optimization problems,
and then I have to implement them and show/prove that they are good
enough, in terms of effectiveness (quality of the solution that the
algorithm is able to find, for some given "difficult" problems), and
not mainly in terms of efficiency (time to find the solution).

I mean, in order to prove that my algorithms are "good", I have to
compare them with the results given by other algorithms, in terms of
how much better is the solution given by my proposal, in front of the
previous ones. Only comparatives in terms of "number of iterations",
and not "time to find the solution", can be done (I think).

And I also realize, from your posted answers, that the point is doing
a good programming work, and that I will have to look very carefully
at all those packages and resources you have mentioned, to do a good
work at Python.

Any other suggestion will be welcomed.    :-)

Thank you very much again!

--
Vicent


From gandalf at shopzeus.com  Thu May 15 04:07:47 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 10:07:47 +0200
Subject: Recommended way to POST with cookies?
In-Reply-To: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
References: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
Message-ID: <482BEF53.1070708@shopzeus.com>

Gilles Ganault wrote:
> Hello
>
> 	According to Google, there seems to be several tools available,
> possibly deprecated, to download data from web pages by POSTing forms
> and save cookies to maintain state.
>
> I need to write a script under Windows with ActivePython 2.5.1.1  that
> would do this:
> 1. Connect through a local proxy, so I can see the whole dialog
> between the Python script and the web server
> 2. POST form variables
> 3. Save cookies sent by the server (session cookie to keep state)
> 4. Save received data into an SQLite file
>
> Which tools would you recommend for this type of script?
>   
Within a day this is the second request for a browser emulator. Looks 
like many pepole want this.

I just posted a recipe that you can try:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/572202


Best,

Laszlo



From duncan.booth at invalid.invalid  Wed May 14 11:37:28 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 May 2008 15:37:28 GMT
Subject: list.__len__() or len(list)
References: <mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <Xns9A9EA912F773Dduncanbooth@127.0.0.1>

Nikhil <mnikhil at gmail.com> wrote:

> Then why to have __len__() internal method at all when the built-in 
> len() is faster?

Because the internal method is used internally.

The idea is that you define __len__() on your objects when appropriate. You  
are not expected to ever call it.


From cliveswan at yahoo.co.uk  Fri May  9 09:40:38 2008
From: cliveswan at yahoo.co.uk (Clive_S)
Date: Fri, 9 May 2008 06:40:38 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
Message-ID: <8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>

Hi all

I downloaded (from Python) and installed python-2.4.4.msi

I have python and pythonw.exe in the Python 24 folder (but not in my
start menu).
When I click on the pythonw.exe it is not launched??

Thanks

Clive


On 9 May, 14:09, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
>
> > Hi
> > I am trying to use Python with ArcGIS.
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> > How do you install or launch pythonwin??
> > Thanks
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike



From castironpi at gmail.com  Tue May 13 11:24:01 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:24:01 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<7ff9c6b7-ed99-49eb-8dce-9749b1287f7e@i76g2000hsf.googlegroups.com>
Message-ID: <171eac06-c184-4e09-a51a-00c1f8e4eddc@d77g2000hsb.googlegroups.com>

On May 13, 10:08?am, castiro... at gmail.com wrote:
> Just catch throw, stuff, and information. ?I think it's fine. ?I have
> an hour to write some code. ?Who wants parity stuff?
>
> On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
> > Any programming that helps you solve a problem is fun and
> > recreational. At least, that's how I look at it. I suppose it really
> > depends on why you're doing it, what your objective is, etc. But I'd
> > say, why not?
>
> > Tron! That's one I haven't seen in awhile. I'll have to take a mental
> > note to rent the movie again someday. I always thought a game based on
> > the movie hackers would be cool. Actually not based on the movie
> > itself, but on that 3D computer world they kept breaking into. Ah man,
> > it's so funny looking back on that film. Gibson, that's what they
> > called it. It was like a 3D database. That in itself wouldn't make a
> > very good game, but I suppose one could easily be created around that
> > idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> > trapped in this 80's looking 3D world that has access to all the
> > world's information. More stuff could be thrown in to make it more
> > interesting. And of course, there would have to be hidden references
> > or parodies to whatever movies inspired it.
>
> > Good luck with your project
>
> > Sincerely,
> > Joshua
>
> > On May 13, 9:02?am, castiro... at gmail.com wrote:
>
> > > Hi all.
>
> > > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > > Now to repeat the subject line. ?I'm stuck in Python.
>
> > > Now that was fun. ?I will also try to enumerate simple screen savers
> > > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > > "overunity", such that one person can't be at liberty to live, which
> > > in some technical political arenas would be an "anarchy", but there
> > > are sufficiently many of those that I will too.
>
> > > Does anyone want such a list, or if not, is it at least fun and
> > > recreational to make it? ?The dollar would come along the lines of
> > > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > > and peaceable. ?(As the above would show, you would be free to
> > > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > > Guido getting his fair share? ?I am prepared to share with him.)
> > > Check in his name.
>
> > > I want to try to ally with other programmers and make cool games, like
> > > Tron, that one party can make games for on a console, such as live
> > > obstacles, incl. tear-down, and certain people have to play from time
> > > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > > of time. ?Very summer.
>
> > > Resemblances would include Dungeons & Dragons with multi-host, or
> > > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > > attractive (duh). ?As for voice, it's not clear it's the most
> > > entertaining, but I just don't have a mic.
>
> > > However, forseeing, I return with sailing, but that's in 3-space and
> > > not even in code, as though we'd construct the Royal Navy and battle.
> > > But I think we can keep it well.
>
> > > Thing is, someone has to play it to keep a synch (keep from falling),
> > > and tap-outs would have to live.
>
> > > Side note: In political theory, this is known as the problem of
> > > nominating a successor. ?Would it stay afloat, even for long enough to
> > > make it worth the negatives, yes which do include tear-down and fall,
> > > invasion of privacy, and rights infrigement?
>
> > > I code in Python (get the callbacks), but configurable servers could
> > > spread the work out, using relays to put each person on each's own
> > > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > > c-l-py is the appropriate place to start such a thing, both and ask if
> > > it's been done before.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

My head tongue is itching.  My tongue is itching my had head.


From gagsl-py2 at yahoo.com.ar  Tue May  6 01:14:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 02:14:48 -0300
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>
Message-ID: <op.uapviylcx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 20:34:32 -0300, John Schroeder <jschroed at gmail.com>  
escribi?:

> Basically I have some classes like this:
>
>
> ###############################################################################
> # 0x01: ModeCommand
> ###############################################################################
> class ModeCommand:
>     """This is the Mode Command Packet class."""
>     def __init__(self, mode, command, id=0x01):
>         """The unspecial init function."""
>         self.mode = mode
>         self.command = command
>         self.id = id
>
>     def RawData(self):
>         return [self.id, self.mode, self.command]
>
>     def __getitem__(self, index):
>         """[] operator (read): indexes from the byte data."""
>         return self.RawData()[index]
>
>     def __str__(self):
>         """Print a nice thing."""
>         string = "Mode = %d\n" % self.mode + \
>                  "Command = %d\n" % self.command + \
>                  "ID = %d\n\n" % self.id
>         return string
>
> ###############################################################################
> # 0x02: CallRequest
> ###############################################################################
> class CallRequest:
>     """This is the Call Request Packet class.  (Look familiar?)"""
>     def __init__(self, service_number, id=0x02):
>         """The unspecial init function."""
>         self.service_number = service_number
>         self.id = id
>
>     def RawData(self):
>         return [self.id, self.service_number]
>
>     def __getitem__(self, index):
>         """[] operator (read): indexes from the byte data."""
>         return self.RawData()[index]
>
>     def __str__(self):
>         """Print a nice thing."""
>         string = "Service Number = %d\n" % self.service_number + \
>                  "ID = %d\n\n" % self.id
>         return string
>
>
> ###############################################################################
> # Test Code
> ###############################################################################
> x = ModeCommand(mode=1, command=0)
> print x[:]
> print x
> y = CallRequest(service_number=2001)
> print y[:]
> print y
>
>
> Which is ok but I had to do this over 100 times.  It is difficult to
> maintain and no one else can understand what the heck I did here.  So I  
> was
> trying to look a metaclasses to do something fancy like this:

You don't need a metaclass, nor a class factory. You only need a base  
class.
__getitem__ is the same on both classes, and presumably on all: move it to  
the base class.
And the only difference between both versions of __init__, RawData and  
__str__ is the name and order of the attributes: let's make them a  
parameter, a class attribute. The default id attribute may be a class  
attribute too.
So in principle, if you have the right base class, the subclasses could be  
defined as simply as:

class ModeCommand(Base):
     """This is the Mode Command Packet class."""

     parameters = "mode command id".split()
     id = 0x01

class CallRequest(Base):
     """This is the Call Request Packet class.  (Look familiar?)"""

     parameters = "service_number id".split()
     id = 0x02

and that's all. Now we have to write the Base class:

class Base(object):
     parameters = None # redefined in all subclasses
     id = None

     def __init__(self, **kw):
         assert self.parameters is not None # must be redefined
         for name in kw:
             if name in self.parameters:
                 setattr(self, name, kw[name])
             else:
                 raise NameError, "unknown parameter: %s" % name
         assert self.id is not None # must be redefined

     def RawData(self):
         return [getattr(self, name) for name in self.parameters]

     def __getitem__(self, index):
         return self.RawData()[index]

     def __str__(self):
         return '\n'.join(
                      ["%s = %r" % (name, getattr(self, name))
                       for name in self.parameters])

py> x = ModeCommand(mode=1, command=0)
py> print x[:]
[1, 0, 1]
py> print x
mode = 1
command = 0
id = 1
py> y = CallRequest(service_number=2001, id=13)
py> print y[:]
[2001, 13]
py> print y
service_number = 2001
id = 13

(the convention is to use lowercase names for attributes: rawdata instead  
of RawData)

-- 
Gabriel Genellina



From arituay at gmail.com  Fri May 16 16:14:01 2008
From: arituay at gmail.com (Chad Wilhite)
Date: Fri, 16 May 2008 16:14:01 -0400
Subject: morning in Python
In-Reply-To: <5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
	<28kXj.142759$Er2.39732@bignews6.bellsouth.net>
	<5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>
Message-ID: <3c50a9820805161314h363ad017r6652de7822d2b7c2@mail.gmail.com>

On Fri, May 16, 2008 at 2:54 PM, Dan Upton <upton at virginia.edu> wrote:

> On Fri, May 16, 2008 at 2:12 PM, inhahe <inhahe at gmail.com> wrote:
> >
> > "George Sakkis" <george.sakkis at gmail.com> wrote in message
> > news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
> > On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
> >> I'm not an expert in this but what does it mean to emphasize state? It
> >> seems the opposite of that would be a) functional programming, and b)
> >> passing parameters instead of using global or relatively local
> variables.
> >> And maybe c) coroutines (generators as implemented in Python), although
> >> perhaps coroutines could be said to emphasize state inasmuch as they go
> >> out
> >> of their way to capture, objectify and reuse it (Stackless'
> microthreads,
> >> even moreso). And Python seems to be well-noted for implementing some
> >> functional programming methodology, and as for passing parameters it's
> >> just
> >> as object-oriented as the rest of them.
> >>
> >> But as I said, I'm not an expert, so let me know if I've gone astray..
> >>
> >> > I have a proposition to ask you all: Python emphasizes state. Is it
> >> > true?
> >
> > Please don't feed the bots.
> >
> > --
> >
> >
> > I figured the question was interesting enough to warrant discussion
> whether
> > it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.
> >
> > Also, if it's a bot I'm floored and the man who wrote it could probably
> > solve cancer and world hunger with five lines of asm.
> >
>
> Yeah... when he/she/it first appeared the replies were at least mostly
> lucid, if not necessarily helpful, and spawned a few interesting
> discussions.  Recently it's gone downhill... Could be some sort of bot
> that was trying to learn 'speech' patterns and it overloaded its
> database.  (I've seen that happen on at least one chatbot...)
> --
> http://mail.python.org/mailman/listinfo/python-list
>


I am trying to filter out this bot via my gmail account but what ends up
happening is that any thread it posts ends up being deleted instead of just
its individual posts.  Does anyone know how to filter out just a specific
user in gmail thread view?

Thanks,

Chad
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From arnodel at googlemail.com  Wed May 28 12:59:42 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 17:59:42 +0100
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <m2k5he4b5t.fsf@googlemail.com>

eliben <eliben at gmail.com> writes:

> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> So, I've defined:
>
> class Game:
>   self.GameState = Enum('running', 'paused', 'gameover')
>
>   def __init__
>    ... etc
>
> Later, each time I want to assign a variable some state, or check for
> the state, I must do:
>
>   if state == self.GameState.running:
>
> This is somewhat long and tiresome to type, outweighing the benefits
> of this method over simple strings.
>
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?

Why not define GameState outside your Game class?

Then you can write:

    if state == GameState.running

which is slightly shorter.

Or you could do:

class Game:
    RUNNING, PAUSED, GAMEOVER = 0, 1, 2

and test like this:

    if state == Game.RUNNING

Or, I've just thought of this simple state class:

class State(object):
    def __init__(self, state):
        object.__setattr__(self, '_state', state)
    def __getattr__(self, attr):
        return attr == self._state
    def __setattr__(self, attr, val):
        object.__setattr__(self, '_state', attr)

>>> state = State('running')
>>> state.running
True
>>> state.paused
False
>>> state.paused = True
>>> state.paused
True
>>> state.running
False

So you could write:

    if state.running: ...

-- 
Arnaud



From szrRE at szromanMO.comVE  Sat May 31 01:40:03 2008
From: szrRE at szromanMO.comVE (szr)
Date: Fri, 30 May 2008 22:40:03 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
Message-ID: <g1qobk02jbj@news4.newsguy.com>

Arne Vajh?j wrote:
> Stephan Bour wrote:
>> Lew wrote:
>> } John Thingstad wrote:
>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>> } > I don't like the style, but many do.
>> }
>> } Please exclude the Java newsgroups from this discussion.
>>
>> Did it ever occur to you that you don't speak for entire news groups?
>
> Did it occur to you that there are nothing about Java in the above ?

Looking at the original post, it doesn't appear to be about any specific 
language.

-- 
szr 




From http  Tue May 20 20:59:07 2008
From: http (Paul Rubin)
Date: 20 May 2008 17:59:07 -0700
Subject: feature proposal, debug on exception
Message-ID: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>

There's an occasional question here about how to get python to launch
pdb on encountering an uncaught exception.  The answer is to look in
some ASPN recipe and do some weird magic.  I guess that works, but
it's another thing to remember or keep looking up when the occasion
arises (some program crashes unexpectedly).  I find myself manually
adding tracing instead, finding out that I did it wrong and having to
re-launch a long-running program, etc.

I'd like to propose that debug-on-exception be made into a standard
feature that is easy to enable, e.g. with a command line option
or with a simple pdb call immediately after the import:

  import pdb
  pdb.debug_on_exception(True)
  ...

Would there be big obstacles to this?  It would have saved me
considerable hassle on a number of occasions.  I'm constantly
processing large data sets that will munch along happily for hours and
hours before hitting some unanticipated condition in the data, and it
would be great to trap immediately rather than have to analyze the
resulting stack dump and restart.


From jeffober at gmail.com  Sat May 17 08:23:32 2008
From: jeffober at gmail.com (Jeff)
Date: Sat, 17 May 2008 05:23:32 -0700 (PDT)
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
Message-ID: <262b4f46-f3d6-4a29-b7a6-91eb279d1f29@j22g2000hsf.googlegroups.com>

Your worker threads wait around forever because there is no place for
them to exit.  Queue.get() by default blocks until there is an item in
the queue available.  You can do something like this to cause the
worker to quit when the queue is empty.  Just make sure that you fill
the queue before starting the worker threads.

from Queue import Queue, Empty

# in your worker
while True:
  try:
    item = q.get(block=False)
  except Empty:
    break
  do_something_with_item()
  q.task_done()

You can also use a condition variable and a lock or a semaphore to
signal the worker threads that all work has completed.


From gagsl-py2 at yahoo.com.ar  Sat May 24 15:54:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 16:54:12 -0300
Subject: persistent deque version 4
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<XF1Zj.78287$%15.22707@bignews7.bellsouth.net>
	<DagZj.61385$3v1.14491@bignews3.bellsouth.net>
Message-ID: <op.ubob8mfyx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 12:20:56 -0300, inhahe <inhahe at gmail.com> escribi?:

> I thought about the fact that a decorator is merely syntactic sugar, so it
> shouldn't have any closure magic that I can't make myself, and I realized
> that I could have done it the following way:
>
> def makefunc(func):
>   def func2(instance, *args):
>     result = func(instance, *args)
>     instance.save()
>     return result
>   return func2

Using functools.wraps is better because it helps to preserve the function name and signature:

def makefunc(func):
     @wraps(func)
     def wrapper(self, *args, **kwds):
         result = func(self, *args, **kwds)
         self.save()
         return result
     return wrapper

-- 
Gabriel Genellina



From benjamin.kaplan at case.edu  Tue May 27 12:42:21 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 27 May 2008 12:42:21 -0400
Subject: New chairman
In-Reply-To: <0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <ec96e1390805270942k25b17f65h27161eca6366baf@mail.gmail.com>

On Tue, May 27, 2008 at 11:48 AM, Sverker Nilsson <sn at sncs.se> wrote:

> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.
>
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it
>
> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.
>
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
>
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business
>
>
Just because Guido doesn't post to the python users' mailing list doesn't
mean he isn't involved with the continuing development of Python.

>
> S.
>
> On May 27, 5:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Sverker Nilsson wrote:
> > > I was talking about Guido van Rossum
> >
> > > The one who decides, so far when people agree
> >
> > > But we can make a new fork
> >
> > Good luck with that. Weren't you the one concerned about changes in Py3K
> > that forced you to change your memory profiler? Now you want to introduce
> a
> > *third* codebase beside python2.x and python3.x? Interesting course of
> > action.
> >
> > > He is the originator, but now it seems, for me, it is hanging out in
> > > the air
> >
> > Why do you think so? Because you don't like Py3K?
> >
> > > So we need some new leadership
> >
> > > From somebody, somebody like you perhaps. Or me.
> >
> > Well - be my guest to form your own cult.
> >
> > Diez
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ivan.illarionov at gmail.com  Thu May  1 19:54:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 23:54:10 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
	<071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>
Message-ID: <fvdl72$3ep$2@news.mtu.ru>

On Thu, 01 May 2008 16:32:00 -0700, Carl Banks wrote:

> On May 1, 4:50 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:
>> > On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> >> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
>> >> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk>
>> >> > wrote:
>> >> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> >> >> > IMO .ini-like config files are from the stone age. The modern
>> >> >> > approach is to use YAML (http://www.yaml.org).
>>
>> >> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
>> >> >> and so comprehensively and completely fails to achieve its stated
>> >> >> main goal of being "readable by humans", that I had assumed it
>> >> >> was an April Fool along the lines of Intercal or brainf***.
>>
>> >> > YAML, ISTM, took a simple concept that worked for small,
>> >> > straightforward data, and tried to make into a format that could
>> >> > anything anywhere, with disastrous results.  It's not unlike Perl
>> >> > in this regard.  It's quite ridiculous.
>>
>> >> > My recommendation to the OP would be:
>>
>> >> > If you intend to write a GUI that completely sets all the options,
>> >> > use XML.  You can bet there are some users who would prefer text
>> >> > editing options files, and XML, while not the most readable format
>> >> > available, at least gives users the option.
>>
>> >> > If you don't intend to write a GUI to do that, write a simple text
>> >> > file parser (if the options are simple), use ConfigParser, or use
>> >> > a Python file that you exec.
>>
>> >> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
>> >> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
>> >> > using the Windows registry to store options; use it to modify
>> >> > Windows behavior (like file associations) but keep your own
>> >> > program's options in your own file.
>>
>> >> If you don't like YAML, use JSON or something similar -- XML is
>> >> overkill and .INI is too limited.
>>
>> > I don't think you know the OP's requirements enough to know whether
>> > INI or XML is suitable. You're welcome to suggest alternatives but
>> > what I suggested is fine.
>>
>> > As for XML being overkill for anything, I highly disagree. XML is
>> > suitable for the smallest tasks.  These days I use XML for almost all
>> > my data exchange needs: including conf files.  Elementtree makes it
>> > possible to process XML and pull out some typical data in ten or so
>> > lines of code.  What could possibly be overkill about that?
>>
>> > Carl Banks
>>
>> I used XML for almost everything in the past until I found YAML.
>> Elementtree makes it easy but not easy enough.
> 
> I'm honestly very happy for you that you have found the data transfer
> format that you are happy with, but I'm sorry, that doesn't amount to a
> blanket invalidation of everything you've ever tried and rejected.
> 
> 
>> The most powerful thing
>> about YAML is that it was designed to map directly to native data types
>> in languages like Python (see another my post in this thread for
>> example). And this means that simple YAML files will always be easier
>> to process in Python than XML or INI. And this in turn means that OP
>> with any requirements will have to write less code to read and write
>> his config files.
> 
> I will mention that Python already has, built in, a data transfer format
> that maps directly to Python types: pickle.
> 
> And not only that, it's more readable than YAML.
> 
> 
> I will also add that what you think of as a strength is not always
> thought of as a strength by everyone.  In my early days of Python, I
> would use pickle for all kinds of things.  I've now pretty much switched
> entirely to XML, because I no longer believe that direct correspondance
> to Python types is a good thing; at least it isn't for me.  There is a
> very basic reason for this: whenever I write a pair of tools, one to
> output some XML data, and another further down the chain to read it back
> in, I hardly ever want the data to have the same structure in memory in
> both tools.  For me, YAML or pickle would not gain me anything; I'd be
> doing all that reformatting anyway.

Agree, all depends on programmer's preferences.

> Of course, the OP wasn't talking about data transfer, he was talking
> about a freaking config file.  Reading in a config file is a ridulously
> silly thing to try to hyperoptimize.  Do you really want him to add an
> extra dependency just to reduce code used by five lines?
> 
> 
> Carl Banks

No, all I want is to give the OP a useful alternative and make him aware 
of the latest trend in the config file formats.

-- 
Ivan


From johnjsal at NOSPAMgmail.com  Wed May 14 22:55:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:55:57 -0400
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
	<NkNWj.138991$Cj7.33283@pd7urf2no>
Message-ID: <20080514225557.2617ab7b.johnjsal@NOSPAMgmail.com>

On Thu, 15 May 2008 02:36:29 GMT
Collin <collinyeung at shaw.ca> wrote:

> So the .lower() string method is just to convert the string to lowercase 
> letters so that you don't have to type a bunch of if - then statements 
> in both cases, I'm assuming?

You can also type:

dir(str)

to get a list of all the methods you can call on a string object. If you see anything interesting, then type:

help(str.<method_name>) # e.g. help(str.split)

to find out how it works. :)


From bruno.desthuilliers at gmail.com  Mon May 12 13:42:30 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 12 May 2008 10:42:30 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
Message-ID: <688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>

On 12 mai, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se> escribi?:
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> >     if i%3 == 0 and i%5 != 0:
> >         print "Fizz"
> >     elif i%5 == 0 and i%3 != 0:
> >         print "Buzz"
> >     elif i%5 == 0 and i%3 == 0:
> >         print "FizzBuzz"
> >     else:
> >         print i
>
> > is there a better way than my solution? is mine ok?
>
> Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
> The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.
>
> (We used this question last year - some people gave a sensible answer in less than 5 minutes,  but others did not even know how to start)

I just can't believe someone applying for a programmer position cannot
provide a sensible anwser in 5 or less minutes.



From pball.benetech at gmail.com  Mon May 26 02:33:00 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 23:33:00 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com> 
	<3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com> 
	<3a550801-6e43-4c81-9749-7cb157446668@y21g2000hsf.googlegroups.com>
Message-ID: <aec5cb33-a499-4853-b6cf-52fe9a97fd03@v26g2000prm.googlegroups.com>

On May 25, 10:41?pm, miller.pau... at gmail.com wrote:
> So, basically, V = (v_1, v_2, ... , v_{k-1}, v_k) can be regarded as
> an abstract, k-dimensional vector, right?

Yes.


> If I understand your revised problem statement correctly, what you
> really want to do is build a graph of these vectors, where graph
> adjacency is equivalent to adjacency in your sense. ?That is, imagine
> you have V_1, V_2, ... , V_n all sitting out in front of you,
> represented abstractly as simple points. ?Draw a line between V_i and
> V_j if they are "adjacent" in your sense of the word. ?What you have
> then is a graph structure where your version of adjacency exactly
> corresponds to graph adjacency. ?Then, in your language, a stratum is
> simply a path in this graph, and finding those is easy.

You're solving an earlier part of the problem which I call stratum
generation. I've never thought to use a graph representation for
stratum generation -- very interesting, and I'll pursue it. Would you
be willing to outline how you'd do it here?

I've had fun "breeding" strata using genetic algorithms, and a lot of
interesting ideas came out of that experiment, in particular the
utility of building randomly shaped strata to do indirect estimates
(the objective of the set arithmetic described here). I used GA's
because I think that the space of possible strata is too big to search
by brute force.

I'd still like to have the graph representation for the brute force
solution. Or, in another random algorithm, the graph could be a
sampling frame from which random paths could be pulled.

In a real dataset, some of the strata will contain adequate data to
make an estimate, and these are called valid strata. Other legal
strata (as shown by a path through the graph) may not have adequate
data to make an estimate (thus, legal but invalid).

We've done this problem by hand: observing that we can estimate a
stratum (1,2,3) and another (2,3) but not (1). So
     E(1) = E(1,2,3) - E(2,3)
There are issues with the variance of E(1), but that's a very
different problem. Using the valid strata E(1,2,3) and E(2,3) we've
made an indirect estimate of E(1).

I'm looking for an algorithm which automates the search for
combinations like the one above. Given a set of valid strata[1], yield
combinations of valid strata which, when combined via union or
difference[2], evaluate to a stratum (adjacent but possibly not
valid). The combination of valid strata is called an indirect
estimate

[1] strata can be generated via many methods; they all end up in the
same database
[2] Note that the set of operations is shrinking :)

Thanks in advance for your thoughts -- PB.



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 30 07:56:50 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 30 May 2008 13:56:50 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <483feb70$0$16182$426a74cc@news.free.fr>

allendowney at gmail.com a ?crit :
> Hi All,
> 
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
> 
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
> 
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
 >
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
> 
> Thanks for any guidance you can provide.

Same remarks as anyone else that answered so far: definitively use 
new-style classes, and just add a note about the old-style syntax.



From zutesmog at gmail.com  Sun May 18 20:41:57 2008
From: zutesmog at gmail.com (timh)
Date: Sun, 18 May 2008 17:41:57 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <5707fe7c-0694-47c9-aa30-9d557c0aa0d1@b9g2000prh.googlegroups.com>

On May 19, 6:20?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Hi

I work fulltime developing in python and have done so for more than 5
years now, and I would say 99.8% of the time I have not
built anything with a GUI (Unless you consider a web page as a GUI ;-)

Much of my work is web based (zope backend stuff), test frameworks for
windows build environments that need to compare the output of 1000's
of images from rendering pipelines. Lots of data integration and
manipulation utilities as part of processing pipelines. All sorts of
stuff that just doesn't use
a GUI.

T



From aspersieman at gmail.com  Tue May 13 08:49:57 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Tue, 13 May 2008 14:49:57 +0200
Subject: Need to install Python in windows 32 bit processor
In-Reply-To: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>
References: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>
Message-ID: <48298E75.4080906@gmail.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080513/2a39e740/attachment.html>

From castironpi at gmail.com  Sat May 10 08:02:46 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 05:02:46 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org> 
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com> 
	<sQZUj.125646$rd2.117530@pd7urf3no>
	<1c8a388a-4d04-4152-9b6e-3d64d96ec7f0@24g2000hsh.googlegroups.com>
Message-ID: <57e0a2c5-88f3-4799-9feb-dca33232c497@e53g2000hsa.googlegroups.com>

On May 9, 3:17?pm, castiro... at gmail.com wrote:
> On May 9, 10:11?am, Yves Dorfsman <y... at zioup.com> wrote:
>
>
>
>
>
> > castiro... at gmail.com wrote:
> > > The only thing is, is there is another natural meaning to [a,b:c].
>
> > > Counting grids on the diagonals, the rational set is well defined:
>
> > > 0: 0, 0
> > > 1: 1, 0
> > > 2: 0, 1
> > > 3: 2, 0
> > > 4: 1, 1
> > > 5: 0, 2
> > > 6: 3, 0
> > > 7: 2, 1
> > > ...
>
> > > Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined. ?Thencefore,
>
> > > a,b:c,d
>
> > > is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].
>
> > I'm not sure what you mean here. Could you give me a simple piece of code to
> > show an example ?
>
> > Yves.http://www.SollerS.ca-Hide quoted text -
>
> > - Show quoted text -
>
> Yves, sadly, simple piece of code is not the writer's forte. ?I was
> merely advising against leaping in to syntax additions, changes even.
> The point was, even though a,b:c,d is shown ill-defined, a,b:c may not
> be.- Hide quoted text -
>
> - Show quoted text -

Now: In the case of enumerate( rationals ), list slicing can be plenty
fine.  Any use to the dirational enumerate?


From castironpi at gmail.com  Wed May 14 06:25:19 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 03:25:19 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com>
Message-ID: <1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com>

On May 14, 4:32?am, castiro... at gmail.com wrote:
> On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > you can safely ignore its posts.
>
> > > How does it generate text?
>
> > My guess is by inhaling a lot of intoxicants.
>
> However you know what would be helpful? ?If I could go to the right
> place to start the ring.

I have a slightly sinister role on stage.  Does anyone want to play?


From bbxx789_05ss at yahoo.com  Mon May 12 18:59:01 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 12 May 2008 15:59:01 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>

On May 12, 1:54?pm, Jetus <stevegi... at gmail.com> wrote:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
>
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
>

1) Use BeautifulSoup to extract the path:

JCCOGetImage.jsp?refnum=DN2007036179

from the html page.


2) The path is relative to the current url, so if the current url is:

http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp

Then the url to the page you want is:

http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2007036179

You can use urlparse.urljoin() to join a relative path to the current
url:


import urlparse

base_url = 'http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp'
relative_url = 'JCCOGetImage.jsp?refnum=DN2007036179'

target_url = urlparse.urljoin(base_url, relative_url)
print target_url

--output:--
http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2007036179



3) Python has a webbrowser module that allows you to open urls in a
browser:

import webbrowser

webbrowser.open("www.google.com")


You could also use system() or os.startfile()[Windows], to do the same
thing:

os.system(r'C:\"Program Files"\"Mozilla Firefox"\firefox.exe')

#You don't have to worry about directory names
#with spaces in them if you use startfile():
os.startfile(r'C:\Program Files\Mozilla Firefox\firefox.exe')


All the urls you posted give me errors when I try to open them in a
browser, so you will have to sort out those problems first.





From pavlovevidence at gmail.com  Tue May  6 16:11:02 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 6 May 2008 13:11:02 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <929fa98b-b04d-4703-8dad-6541cf610ebd@k37g2000hsf.googlegroups.com>

On Apr 29, 3:51 am, "Zed A. Shaw" <zeds... at zedshaw.com> wrote:
> GPLv3?
>
> How do people feel about Vellum's GPLv3 status?

It's going to scare away some folks.

Using LGPL will almost certainly scare away fewer.  People who don't
like GPL are usually concerned about its viral aspects moreso than the
requirement to contribute back released changes.



Carl Banks


From vivainio at gmail.com  Thu May  8 11:02:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 08 May 2008 15:02:01 GMT
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04>
Message-ID: <iqxoalg6.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> Is anything lost by not maintaining this reference (other
>
> than error checking ...)?  If I feel the observer needs
>
> access to the subject, what is wrong with just having the
>
> subject pass itself as part of the notification?

It reduces the number of places the observer can be called from,
because now the event source is part of the function signature. If you
omit the event source in the signature, you gain looser coupling -
it's the observer business to create the dependency.

Also, consider the situation where you want all investors to refresh
their idea about stock prices (because of, short network
failure). It's easy to run through a list of them and call update()
for everybody, while it's not so easy to find out what stock the
investor is observing (that's the investors business!) and pass that
object to the investor in the call.

Are these school questions btw? ;-)


From x31equsenet at gmail.com  Sat May 17 01:04:44 2008
From: x31equsenet at gmail.com (Graham Breed)
Date: Sat, 17 May 2008 13:04:44 +0800
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
	<761a3c96-3faf-4347-aeb7-4ca9cba67e42@a23g2000hsc.googlegroups.com>
Message-ID: <g0lp1e$iji$1@aioe.org>

George Sakkis wrote:

> If you push this logic too far, you should del every name immediately
> after the last statement it is used in the scope. I would generally
> find less readable some code spread with del every few lines, micro-
> managing the effective scope of each name. YMMV.

Yes, but ... how about

for i in range(10):
     del i
     do stuff

?

It makes it clear you aren't using the index and ensures you 
get a run-time error if you clobbered an existing variable.


             Graham


From deets at nospam.web.de  Sun May  4 15:08:46 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 21:08:46 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
	<mailman.551.1209924903.12834.python-list@python.org>
	<167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>
Message-ID: <686fu3F2s4cu0U1@mid.uni-berlin.de>

Gilly schrieb:
> On May 4, 9:14 pm, David <wizza... at gmail.com> wrote:
>> On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.de... at gmail.com> wrote:
>>> Hi
>>>  I am trying to create an application that uses some form of input to
>>>  create a midi file.
>>>  I would like for this to be a 'real time' process. In other words, I
>>>  want to be able to begin playing the midi file before I finish writing
>>>  it, and continue writing as it plays.
>> Have you tried the MIDI libraries listed on this page?
>>
>> http://wiki.python.org/moin/PythonInMusic
>>
>> David.
> 
> Yes. I haven't found anything that would help me out...

You didn't provide enough information. who is consuming the midi-files 
for example.

Diez


From grflanagan at gmail.com  Thu May 22 15:14:01 2008
From: grflanagan at gmail.com (Gerard flanagan)
Date: Thu, 22 May 2008 21:14:01 +0200
Subject: Producing multiple items in a list comprehension
In-Reply-To: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <4835C5F9.5040600@gmail.com>

Joel Koltner wrote:
> Is there an easy way to get a list comprehension to produce a flat list of, 
> say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn this 
> back into what I want, but I was hoping there's some way to avoid the "lists 
> of lists" generation in the first place?
> 
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
> do so?
> 
> Thanks,
> ---Joel
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

For the first part:

def gen(n):
     for i in xrange(n):
         yield i
         yield 2*i

print list(gen(4))

[0, 0, 1, 2, 2, 4, 3, 6]

gerard



From __peter__ at web.de  Tue May 13 05:10:38 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 11:10:38 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
	<g0bl2e$ft9$00$2@news.t-online.com>
	<g0blcj$ft9$00$3@news.t-online.com>
Message-ID: <g0bluc$ft9$00$4@news.t-online.com>

Peter Otten wrote:

> Peter Otten wrote:
> 
>> # use at your own risk
>> import numpy
>> 
>> N = 10**4 # I get a MemoryError for a bigger exponent
>> b = numpy.array(range(N))
>> a = numpy.zeros((N, N)) + b
>> a *= a.transpose()
>> a[0,0] = (b*b).sum()
>> print a
> 
> Sorry, this is nonsense.

Maybe not as bad as I feared. I seems you can't transpose and
inplace-multiply, so

# use at your own risk
import numpy

N = 5
b = numpy.array(range(N))
a = numpy.zeros((N, N)) + b
a = a * a.transpose()
a[0,0] = (b*b).sum()
print a

might work if there is sufficient memory available...

Peter


From szhorvat at gmail.com  Mon May  5 03:37:38 2008
From: szhorvat at gmail.com (=?ISO-8859-15?Q?Szabolcs_Horv=E1t?=)
Date: Mon, 05 May 2008 09:37:38 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <mailman.564.1209946487.12834.python-list@python.org>
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
Message-ID: <fvmdg1$1e4p$1@toralf.uib.no>

Gabriel Genellina wrote:
> 
> Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement.

It does not _require_ this, but using an __add__ that is not commutative 
and associative, or has side effects, would qualify as a serious misuse, 
anyway.  So I think that this isn't a real disadvantage (it can always 
be documented that sum() expects __add__ to have these properties).

But you are right that summing floats with a requirement of high 
precision is a quite specific use case, so there are no serious 
arguments to do this, either.


From kamhung.soh at gmail.com  Fri May 30 01:03:28 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 30 May 2008 15:03:28 +1000
Subject: Finding file details...
In-Reply-To: <ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>	<mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
Message-ID: <g1o1r0$fnk$1@ger.gmane.org>

Kalibr wrote:
> On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>> You can use the shell COM objects to access media properties
>> as shown by Explorer.
>>
>> import win32com.client
>> sh=win32com.client.Dispatch('Shell.Application')
>>
>> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
>> ns=sh.NameSpace(folder)
>>
>> ## the column index for Artist may vary from folder to folder
>> for c in range(0,255):
>>     colname=ns.GetDetailsOf(None, c)
>>     if colname=='Artists':  ## This shows up as just Artist on XP
>>         for i in ns.Items():
>>             artist=ns.GetDetailsOf(i, c)
>>             if artist:
>>                 print ns.GetDetailsOf(i, 0), artist
>>         break
>>
>>             Roger
> 
> I shall give that a go. (is the module you reference this one?
> http://python.net/crew/mhammond/win32/Downloads.html )

If you installed ActiveState's Python, the win32com module should be 
installed.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kw at codebykevin.com  Thu May 29 17:23:43 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Thu, 29 May 2008 17:23:43 -0400
Subject: Getting up and running with Python on a Mac
In-Reply-To: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <483F1EDF.6040207@codebykevin.com>

tkpmep at hotmail.com wrote:
> I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
> 10.5.3), and am looking to install Python on it, and to use it with
> XCode, Apple's IDE. Some googling suggests that a number of people
> have had trouble getting Python to run satisfactorily on their Macs.
> This is my first Mac, and I'd appreciate some guidance on what to do
> (and what not to) when installing Python and potential problems to
> keep an eye open for. I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant  - I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.
> 
> Thank you in advance
> 
> Thomas Philips

OS X 10.5 comes with Python installed already: 2.5.1. If you want to use 
Xcode with Python that's the way to go.

If you want a later version of Python, you can download one from 
python.org, but I am not sure how that integrates wtih Xcode.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From florencio.cano at gmail.com  Thu May  8 10:16:37 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Thu, 8 May 2008 16:16:37 +0200
Subject: Best technology for agent/web server architecture
Message-ID: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>

Hi,
I would be interested in your opinion about what technology you
considear the ideal technology for implementing in Python an agent
that should comunicate information to a web server. I have read about
SOAP but I'm now sure if this will be the right one.
The aim of the agent is gather inventory information and the web
application (I'm programming it in Django) will receive this
information and will store it in the database and will show it in
tables.


From ivan.illarionov at gmail.com  Sun May 11 00:39:30 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 11 May 2008 04:39:30 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru>
Message-ID: <g05ta2$20fo$2@news.mtu.ru>

On Sun, 11 May 2008 04:26:10 +0000, Ivan Illarionov wrote:

> On Sat, 10 May 2008 18:12:37 -0700, globalrev wrote:
> 
>> http://reddit.com/r/programming/info/18td4/comments
>> 
>> claims people take a lot of time to write a simple program like this:
>> 
>> 
>> "Write a program that prints the numbers from 1 to 100. But for
>> multiples of three print "Fizz" instead of the number and for the
>> multiples of five print "Buzz". For numbers which are multiples of both
>> three and five print "FizzBuzz".
>> 
>> for i in range(1,101):
>>     if i%3 == 0 and i%5 != 0:
>>         print "Fizz"
>>     elif i%5 == 0 and i%3 != 0:
>>         print "Buzz"
>>     elif i%5 == 0 and i%3 == 0:
>>         print "FizzBuzz"
>>     else:
>>         print i
>> 
>> 
>> is there a better way than my solution? is mine ok?
> 
> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>  or str(i) for i in xrange(1, 101)]
> 
> -- Ivan

or, more correctly, if you actually need to "print":

sys.stdout.write('\n'.join('%s%s' % 
    (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
    or str(i) 
    for i in xrange(1, 101)))

-- Ivan


From torriem at gmail.com  Thu May  8 19:11:56 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 08 May 2008 17:11:56 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <482386FA.10700@gmail.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<482386FA.10700@gmail.com>
Message-ID: <482388BC.7020208@gmail.com>

Ahem...  That should have been:

(negate (pow 123 0))

Using parenthesis to indicate precedence order of ops:

-(123 ^ 0)

The "-" you are using is not part of the number.  It's a unary operator
that negates something.  In normal order of operations, it has a much
lower priority than power.

Your post really took me back to my grade school days!  I remember first
looking with consternation at my scientific calculator when it insisted
that -2^0 is -1.

The order of python operations can be found here:

http://docs.python.org/ref/summary.html

Hope this helps


From rhamph at gmail.com  Fri May  9 12:12:46 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Fri, 9 May 2008 09:12:46 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated 
	summationalgorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1><mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<mailman.809.1210281025.12834.python-list@python.org>
Message-ID: <b956066a-e770-4130-914d-1117798e473c@q1g2000prf.googlegroups.com>

On May 8, 3:09 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Szabolcs Horv?t" <szhor... at gmail.com> wrote in message
>
> news:fvmdg1$1e4p$1 at toralf.uib.no...| Gabriel Genellina wrote:
>
> | >
> | > Python doesn't require __add__ to be associative, so this should not be
> used as a general sum replacement.
> |
> | It does not _require_ this, but using an __add__ that is not commutative
> | and associative, or has side effects, would qualify as a serious misuse,
>
> seq + seq is not commutative ;-)

There's no point switching to a special algorithm unless a float is
detected.  What you're really arguing is seq + seq + float is not
commutative.  In either case we may have to hurt you. ;)


From hdante at gmail.com  Thu May  8 18:21:01 2008
From: hdante at gmail.com (hdante)
Date: Thu, 8 May 2008 15:21:01 -0700 (PDT)
Subject: "prove"
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <03435960-37bd-4bd1-afd8-d86f38c60f0e@27g2000hsf.googlegroups.com>

On May 8, 10:50?am, "Lucas Prado Melo" <luca... at dcc.ufba.br> wrote:
> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

 It's in the language reference, section 3.2 "The standard type
hierarchy", subsection "Classes". The relevant paragraphs are those:

Classes
    Class objects are created by class definitions (see section 7.7,
``Class definitions''). A class has a namespace implemented by a
dictionary object. Class attribute references are translated to
lookups in this dictionary, e.g., "C.x" is translated to
"C.__dict__["x"]". When the attribute name is not found there, the
attribute search continues in the base classes. The search is depth-
first, left-to-right in the order of occurrence in the base class
list.

    When a class attribute reference (for class C, say) would yield a
user-defined function object or an unbound user-defined method object
whose associated class is either C or one of its base classes, it is
transformed into an unbound user-defined method object whose im_class
attribute is C. When it would yield a class method object, it is
transformed into a bound user-defined method object whose im_class and
im_self attributes are both C. When it would yield a static method
object, it is transformed into the object wrapped by the static method
object. See section 3.4.2 for another way in which attributes
retrieved from a class may differ from those actually contained in its
__dict__.

 http://docs.python.org/ref/types.html


From exarkun at divmod.com  Sat May 17 16:06:23 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 17 May 2008 16:06:23 -0400
Subject: waiting on an event blocks all signals
In-Reply-To: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
Message-ID: <20080517200623.4714.412132081.divmod.quotient.61@ohm>

On Sat, 17 May 2008 12:49:54 -0700, John Schroeder <jschroed at gmail.com> wrote:
>On Sat, May 17, 2008 at 12:32 PM, alan <alangrow at gmail.com> wrote:
>
>> This ignores CTRL-C on every platform I've tested:
>>
>> python -c "import threading; threading.Event().wait()"
>> ^C^C^C^C
>>
>> It looks to me like all signals are masked before entering wait(). Can
>> someone familiar with the internals explain and/or justify this
>> behavior? Thanks,
>>
>
>^C only kills the main thread.  Use Control-Break to kill all threads.
>

Look at that program.  It's single-threaded.  Where do you think the ^C
is going? :)

Jean-Paul


From deets at nospam.web.de  Mon May 12 16:06:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 22:06:28 +0200
Subject: downloading a link with javascript in it..
In-Reply-To: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <68rmafF2t1vboU1@mid.uni-berlin.de>

Jetus schrieb:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
> 
> So, in summary, when I download this page, for each record, I would
> like to initiate the "view" link.
> Can anyone point me in the right direction?
> 
> When the "view" link is clicked on in IE or Firefox, it returns a pdf
> file, so I should be able to download it with
> urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
> 
> Here is the following code I have been using
> ----------------------------------------------------------------
>     import urllib, urllib2
> 
>     params = [
>                 ('booktype', 'L'),
>                 ('book', '930'),
>                 ('page', ''),
>                 ('hidPageName', 'S3Search'),
>                 ('DoItButton', 'Search'),]
> 
>     data = urllib.urlencode(params)
> 
>     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> S3DataLKUP.jsp", data)
> 
>     s = f.read()
>     f.close()
>     open('jcolib.html','w').write(s)

Use something like the FireBug-extension to see what the 
openimagewin-function ultimately creates as reqest. Then issue that, 
parametrised from parsed information out of the above href.

There is no way to interpret the JS in Python, let alone mimic possible 
browser dom behavior.

Diez


From castironpi at gmail.com  Fri May 16 18:22:34 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:22:34 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>
Message-ID: <29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>

On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> globalrev wrote:
> > i ahve a program that takes certain textsnippets out of one file and
> > inserts them into another.
>
> > problem is it jsut overwrites the first riow every time.
>
> > i want to insert every new piece of text into the next row.
> > so:
> > 1. how do i write to a new line every time i write to the file?
>
> > 2. if i dont want to write to a new line but just want to insert it
> > after the last token in the file, how do i do then?
>
> Generally, you can't "insert" anything into a file. ?You can either
> append to the end of a file, or you can rewrite the whole file. ?It
> sounds like you probably want to read the file into an array using
> readlines(). ?Then manipulate that array however you want--appending
> and inserting--and when you are done, overwrite the file with your
> array.
>
> However, you should be aware that as soon as you open a file for
> writing all the data is erased, and if your program should happen to
> crash right then, the array containing the data will disappear into
> the ether and your file will be empty--in other words all your data
> will be gone. ?To prevent such an occurence, you should write your
> final data to another file, then delete the original file, and finally
> change the other file's name to the original file name.

Some options:

1.  Limit line length.  Then offset is ( line* length ).
2.  Name your relation.
3.  Hijack the operating system.  Remember:

abc
def

on disk looks like
abc\ndef

where

abcd
def

looks like
abcd\ndef

So, if you want line 2, you have to scan line 1.


From inhahe at gmail.com  Fri May 23 00:40:50 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 00:40:50 -0400
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
Message-ID: <UTrZj.2635$772.1119@bignews2.bellsouth.net>


> PHP can do that.  There are also a number of templating engines
> available.  The nice thing about PHP is you have a choice.

i just meant that php is sort of invented to combine html and code, so if 
you use python instead you should use a templating engine.  but i suppose 
it's useful for php too.




From goldnery at gmail.com  Thu May 29 17:19:12 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 14:19:12 -0700 (PDT)
Subject: question
Message-ID: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>

how do i write this code in order for python to understand it and
print me the x variable

x=1
def aaaa():
    x++
    if x > 1:
        print "wrong"
    else :
        print x

aaaa()


From wuwei23 at gmail.com  Thu May 29 19:13:10 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 16:13:10 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com> 
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org> 
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<20080529175745.b3e7a579.darcy@druid.net> 
	<mailman.1753.1212098583.12834.python-list@python.org>
Message-ID: <024e8e62-d6d2-498b-b01f-0e85b64b51e6@v26g2000prm.googlegroups.com>

On May 30, 8:02 am, "Dan Upton" <up... at virginia.edu> wrote:
> Yeah, but if you look past the "FT is better than Python" propaganda,
> there's some interesting discussion of language design.

Which is more appropriate on a group focused on such a topic.



From goldnery at gmail.com  Tue May 27 04:37:16 2008
From: goldnery at gmail.com (Gandalf)
Date: Tue, 27 May 2008 01:37:16 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com> 
	<g1fe4u$2cld$3@news.mtu.ru>
	<dd0d8550-192b-4abe-9954-efa9070082c8@x41g2000hsb.googlegroups.com>
Message-ID: <d3e732d8-271a-4df6-9a16-37da7d5c7c6d@b1g2000hsg.googlegroups.com>

On May 27, 2:36 am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 26, 5:38 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
>
>
> > On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:
> > > On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> > >> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> > >> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > >> > > Thanks!
> > >> > > Anyone know which library should i learn then?
>
> > >> > Looks like you need to dive into Win32
> > >> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
>
> > (VS.85).aspxhttp://ms...
>
> > >> > and others
> > >> > combined with ctypes.
>
> > >> > Ivan
>
> > >> well, that seems extremely valuable but how can i implement those
> > >> functions with python?
>
> > > You know what I'm sorry, I will try to understand the ctypes lib before
> > > bothering you.
>
> > > thank you all!
>
> > No need to sorry. I have actually found very valuable information athttp://www.brunningonline.net/simon/blog/archives/000652.html
> > while googling to answer your question. I didn't know that such things
> > are really possible with Python/Win32! It'll help me a lot. Thank you!
>
> > Ivan
>
> If you guys are going to go digging into the PyWin32 modules, make
> sure you check this site out:
>
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/pywin32/PyWin3...
>
> It has the docs for the distro and a link to the user's group too. Bot
> have been very helpful to me.
>
> Mike

OK thanks guys I'm going try and if I will succeed I will tel you how
I did it


From paddy3118 at googlemail.com  Sun May 11 01:19:10 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:19:10 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <41c9f303-219e-4b4d-a1b6-ee998b406a39@c65g2000hsa.googlegroups.com>

On May 11, 3:19 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
>     #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Hi John,
If you have an object that is both indexable and iterable, then
visiting every member by first generating an index then indexing the
object is un-pythonic. You should just iterate over the object.

Like most rules, things can get fuzzy around the edges: if you have n
objects to be visited each index at a time, then the more functional
approach would be to izip all the objects and iterate over the result.
Another way would be to iterate over the the enumeration of one object
and use the index created to index the other n-1 objects.

In all such situations you need to remember that things such as code
clarity, and speed, might make the final decision for you.


In the following examples then the first is what I would use, izip. If
I needed an index then I'd prefer the last, which combines izip and
enumerate:

PythonWin 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32.
Portions Copyright 1994-2006 Mark Hammond - see 'Help/About PythonWin'
for further copyright information.

 >>> obj1 = 'CSM'
 >>> obj2 = 'aue'
 >>> obj3 = 'tmn'
 >>> from itertools import izip
 >>> for x,y,z in izip(obj1, obj2, obj3):
 ... 	print x,y,z
 ...
 C a t
 S u m
 M e n
 >>> for i,x in enumerate(obj1):
 ... 	print x, obj2[i], obj3[i]
 ...
 C a t
 S u m
 M e n
 >>> for i in range(len(obj1)):
 ... 	print obj1[i], obj2[i], obj3[i]
 ...
 C a t
 S u m
 M e n
 >>> for i,(x,y,z) in enumerate(izip(obj1, obj2, obj3)):
 ... 	print i, x, y, z
 ...
 0 C a t
 1 S u m
 2 M e n
 >>>


- Paddy.


From kyrie at uh.cu  Wed May 28 14:09:31 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 28 May 2008 14:09:31 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
Message-ID: <200805281409.31644.kyrie@uh.cu>

On Wednesday 28 May 2008 09:22:53 am Dave Parker wrote:
> I think in a month or two, Flaming Thunder will be using catch/throw
> exception and error handling. ?So, for example:

Nice... Flaming Thunder sure evolves quickly. Too quickly to be considered 
a 'feature' of the language. Following your posts in this thread, I see that 
you 'plan to add soon' every cool feature that every other language seems to 
have.

That means that I won't have to test my program only against every major 
versions of Flaming Thunder... i will have to test it with every week's 
version. With no certainty whatsoever that today's program will work on 
tomorrow's FT.

Why don't you wait a bit, until Flaming Thunder is mature enough to be stable, 
before trying to advertise it to us? And in the meantime, some of us are 
going to keep trying to add all the features we've always wanted, to the next 
major version of Python.

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From grante at visi.com  Fri May  2 10:44:59 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:44:59 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
Message-ID: <mu2dnYjNde12tYbVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> wrote:

>>I've never clearly understood why people want to use "#! /usr/bin/env
>>python", which is prone to finding a different Python from the one
>>installed by the operating system. I'd be interested to see what
>>responses are in favour of it, and what the reasoning is.
>
> Simple, some systems are not as peculiar as a lot of Linux boxes which
> chug everything into /usr/bin, which is OS territory

On many Linux distros, Python is pretty much part of the OS.
Since the early days of RedHat, Python has been part of the
base/minimum install since a lot of the "required" system
utilities were written in python.  In Redhat, the package
manger was originally written in Python, so Python had to be in
"OS territory".

> (as has been decreed long ago by hier(7)), but rather use
> /usr/local/bin (all BSD Unix and derivatives) or /opt or
> whatever convention a particular operating system has.

In the Linux world, /usr/local/bin and /opt are for stuff
installed by the user, not stuff that is an integral, required
part of the OS distribution.

-- 
Grant



From Dominique.Holzwarth at ch.delarue.com  Thu May  8 03:26:28 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Thu, 8 May 2008 08:26:28 +0100
Subject: Problems with os.walk
Message-ID: <5213E58D85BC414998FA553C701E386C0EDD1C81D9@SGBD012511.dlrmail.ad.delarue.com>

Hi everyone

The following code:

scriptPath = os.path.dirname(__file__)
(dirpath, dirnames, filenames) = os.walk(scriptPath)
print 'dirpath\n'
print dirpath
print 'dirnames\n'
pprint.pprint(dirnames)
print 'filenames\n'
pprint.pprint(filnames)

Fails on the os.walk call with the following error:

    (dirpath, dirnames, filenames) = os.walk(scriptPath)
ValueError: need more than 1 value to unpack

Any ideas what could be wrong?

Thx & greetings
Dominique

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From sturlamolden at yahoo.no  Wed May 21 13:29:23 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:29:23 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com> 
	<ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com> 
	<4833f2ef$0$3737$426a74cc@news.free.fr>
Message-ID: <64fb9443-5e52-4f55-9b83-2bd43d64b596@m36g2000hse.googlegroups.com>

On May 21, 12:01 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:

> > C has proven very difficult to optimize, particularly because pointer
> > aliasing prevents efficient register allocation.
>
> Does this compare to optimizing something like Python ? (serious
> question, but I think I already know part of the answer).

In Python different references can alias the same object. But the
objects for which this is important in C, is typically elementary
types like ints and floats. Pointer aliasing has the consequence that
the compiler often cannot choose to keep an int or a float in a
register inside a tight loop. This will often have serious
consequences for numerical computing. But these elementary types are
immutable in Python, so Python is actually somewhat immune to this.
This is one of several reasons why RPython sometimes can be "faster
than C".

But there are other much more important issues if you are to generate
efficient machine code from Python, e.g. getting rid of redundant
attribute lookups.



From rupole at hotmail.com  Wed May  7 09:08:32 2008
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 7 May 2008 09:08:32 -0400
Subject: Can't drag and drop onto .py in Windows XP?
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
Message-ID: <fvs9kt$hpn$1@ger.gmane.org>


Sizer wrote:
>I have several python utils that look at sys.argv to get a list of
> filenames to process and mangle the files in various ways. If I have a
> bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and
> bar.bat gets called with foo.avi as an argument, everyone's happy. But if 
> I
> have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a 
> big
> NO cursor and nothing happens.
>
> Now I can work around this by creating a _bar.bat and having the _bar.bat
> call bar.pyw with the filenames it was passed (this is obviously
> ridiculous). Or I can create a shortcut which has the target of
>   c:\python25\pythonw.exe c:\mybar\bar.pyw
> and that works, but makes telling people how to install my utilities on
> their computer a pain in the rear. It's just a little weird that I can't
> just drag and drop file names onto .pyw or .py files. Am I missing
> something here?
>
> Thanks for any help.

You can register a DropHandler for the Python file class.
Put this in a .reg file and merge it into the registry:

REGEDIT4

[HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
@="{86C86720-42A0-1069-A2E8-08002B30309D}"


              Roger





From upton at virginia.edu  Wed May 21 15:38:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 15:38:19 -0400
Subject: best way to check if pid is dead?
In-Reply-To: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
Message-ID: <5504f9ac0805211238s77dfa919kbcfd16420fe98a3@mail.gmail.com>

On Wed, May 21, 2008 at 3:02 PM, bukzor <workitharder at gmail.com> wrote:
> Does anyone have a pythonic way to check if a process is dead, given
> the pid?
>
> This is the function I'm using is quite OS dependent. A good candidate
> might be "try: kill(pid)", since it throws an exception if the pid is
> dead, but that sends a signal which might interfere with the process.
>
> Thanks.
> --Buck
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I don't know if you would call this pythonic, but the way I do it in linux is:

import os
os.path.exists("/proc/%d"%(pid))

Or, more to the point, I'm usually checking to see if processes I
forked have finished, without just having to do a wait4 on them; in
the case you can do something like

procfile = open("/proc/%d/stat" %(pid))
procfile.readline().split[2]

You can do man proc to see what each of the possible letters means; I
look for Z to find that the process has exited but it's waiting for
its parent to do a wait4.

HTH
-dan


From sjmachin at lexicon.net  Fri May  9 23:46:37 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 03:46:37 GMT
Subject: regexp help
In-Reply-To: <eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
	<4824fcec$1@news.mel.dft.com.au>
	<eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>
Message-ID: <48251a9a@news.mel.dft.com.au>

globalrev wrote:
>> The inner pair of () are not necessary.
> 
> yes they are?

You are correct. I was having a flashback to a dimly remembered previous 
incarnation during which I used regexp software in which something like 
& or \0 denoted the whole match (like MatchObject.group(0)) :-)


From gagsl-py2 at yahoo.com.ar  Sun May 25 14:51:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 15:51:01 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
	<mailman.1552.1211679461.12834.python-list@python.org>
	<Xns9AA9687021A04duncanbooth@127.0.0.1>
Message-ID: <op.ubp3zbhox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 06:15:45 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
>> En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth
>> <duncan.booth at invalid.invalid> escribi?:
>>>
>>> It might be worth considering an alternative approach here: a
>>> formatted exception includes the relevant source lines (where
>>> possible).
>>
>> Just to note that the standard cgitb module already does that, among
>> other things.
>>
> Anywhere Python prints a traceback already does that. The 'alternative
> approach' I was suggesting was the part you snipped, i.e. extracting the
> enclosing class name from the source.

Ah, sorry for the misunderstanding!

-- 
Gabriel Genellina



From kyosohma at gmail.com  Mon May 19 11:40:38 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 08:40:38 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>

On May 19, 10:18 am, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.
>
> Thanks,
> SPJ

I think it depends on how you're connecting to the routers.
Theoretically, you should be able to use Python's socket or ssh
modules to connect to them, send commands and capture the output.

Just experiment with one or two routers until you get it.

Mike


From bruno.desthuilliers at gmail.com  Fri May 16 17:47:02 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:47:02 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>
Message-ID: <ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>

On 16 mai, 23:23, dave.g1... at gmail.com wrote:
> Thanks for the responses.  I'm well aware that the function can be
> passed in the parameters, passing in the functino as an arg defeats
> the purpose of what I'm going after.

Why so ?

> @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> but a perfunctory glance looks like we're doing the close to the same
> thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> can pass in other parameters to foo.

I may be wrong (if so please pardon my lack of intelligence and/or
provide a couple use case), but it looks like you're trying to
reinvent partial application.

from functools import partial
def foo(x, y):
  return x + y

pfoo = partial(foo, 2)
print pfoo(42)

Don't know if this helps...


From rossgk at gmail.com  Thu May 15 16:12:12 2008
From: rossgk at gmail.com (RossGK)
Date: Thu, 15 May 2008 13:12:12 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
Message-ID: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>

Just getting used to the PyDev environment in eclipse by playing with
a few simple programs. I'm also using wxPython GUI stuff.

 I've noticed though that simple print commands in my code cause a
"wxPython:stdout/stderr" popup window to display any print's I might
be dumping out, rather than going to the console in Eclipse.

Any suggestions of why this is?   Another code example I was looking
at (which does not include any wx GUI stuff) has print commands whose
result ends up in the Eclipse console, just to further confuse me.

Is this something that wxPython is imposing on the environment?

Thx.
Ross.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 08:19:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 14:19:16 +0200
Subject: Calling class method by name passed in variable
In-Reply-To: <slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <4836b62b$0$24427$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>>> Can someone suggest an efficient way of calling method whose name is
>>> passed in a variable?
>>>
>>  method = getattr(obj, 'method_name', None)
>>  if callable(method):
>>       method(args)
> 
> I think that that is needless LBYL...

 From experience, it isn't.


>    getattr(obj, 'method_name')(args)
> 
> Will produce some perfectly good exceptions

The problem is that you can't tell (without reading the exception's 
message and traceback etc) if the exception happened in you code or 
within the called method.



From daveparker at flamingthunder.com  Tue May 13 12:56:08 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:56:08 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
Message-ID: <8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>

> Who has conducted the research that supports that statement? And since when
> is ^ the better operator for "to the power of" that **? Because latex uses
> it? I need to see the elementary school students who use that...

All of the calculators and textbooks that elementary school students
use, use "^" for powers.  Just like Flaming Thunder does.  I haven't
seen "**" for powers since FORTRAN.

On May 13, 10:38?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > True. ?But in Python, you don't see statically-linked pure-syscall CGI
> > scripts being cross-compiled under Windows for ftp'ing up to a Linux
> > server. ?And you don't see the speed of pure assembly language
> > libraries. ?And I'll be willing to bet that Flaming Thunder will have
> > OO features similar to Python before Python has the features that
> > Flaming Thunder already does.
>
> Your bets don't count anything here. These things don't exist, so don't brag
> on them being superior.
>
> > For many people, being 5 to 10 times faster at numerical analysis and
> > CGI scripting is reason enough to pay $19 per year. ?But maybe for
> > other people, having slow, inefficient programs and websites is
> > acceptable.
>
> Quite a revealing statement I'd say. And unless you don't show any
> real-world site running on FT that needs things like sessions, cookies,
> database-connectivity, unicode and a ton more of stuff FT doesn't support
> out-of-the-box or through 3rd-party-libs, I wouldn't mention "the people"
> as well. So far, *all* that you've been showing on your site regarding CGI
> are toy-scripts. Nothing more.
>
> >> And what is really expensive is brain-cycles, not cpu-cycles.
>
> > Depends on whether you're the programmer, or the customer. ?I've found
> > that customers prefer products that are 5 to 10 times faster, instead
> > of products that were easy for the developer.
>
> This shows how much you don't know about customers, and their needs. A
> customer gives a s**t about 5-10 times faster sites. They care if it is
> *fast enough*, but beyond that they don't bother. But what *always* bothers
> them is development time & flexibility. Because that directly affects the
> price they pay.
>
> And if a average man-day costs $600 (which is not expensive), and the
> project is of average size of a couple of man-months - well, you care about
> mathematics, do the math yourself what that means that FT lacks anything
> but a simple CGI-interface.
>
> > And I disagree that Flaming Thunder requires more brain-cycles.
> > Because it's based on leveraging existing English and math fluency
> > (which was one of the original goals of Python, was it not?), I think
> > that Flaming Thunder requires fewer brain-cycles because fewer brains
> > cells have to be devoted to memorizing language peculiarities.
>
> It does require more, because it lacks all the libs and 3rdparty-libs. And
> because it lacks features such as OO and other stuff, it will be harder to
> write these as well as use them.
>
> Show me how to beat a quickstarted TurboGears/Django webproject. *Then* you
> can talk business here.
>
> > Perhaps. ?But if elementary school students can easily understand why
> > one programming language gives the answer 100 (Flaming Thunder):
>
> > ? Write 10^2.
>
> > but can't understand why another programming language gives the answer
> > 8 (Python):
>
> > ? Print 10^2
>
> > then I think the comparison moves beyond a matter of taste into the
> > realm of measurable ease-of-use.
>
> Who has conducted the research that supports that statement? And since when
> is ^ the better operator for "to the power of" that **? Because latex uses
> it? I need to see the elementary school students who use that...
>
> Even *if* that would be true, how does a perceived advantage in one field FT
> was explicitly created for show that it is the generally better one and
> understandable one for more diverse applications?
>
> Diez



From deets at nospam.web.de  Mon May 12 10:50:02 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 16:50:02 +0200
Subject: Removing option from optparse
In-Reply-To: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>
References: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>
Message-ID: <68r3p5F2t6nq8U1@mid.uni-berlin.de>

GustavoTabares at gmail.com schrieb:
> Hello,
> 
> I'm trying to figure out if the following is a bug or if I'm using the
> remove_option in the wrong way.
> 
> #!/usr/bin/env python
> import optparse
> parser = optparse.OptionParser()
> parser.add_option("--test", help="This is a test option")
> parser.remove_option('--test')
> print parser.parse_args()
> 
> this will output:
> (<Values at 0x6beb8: {'test': None}>, [])
> 
> If you execute the --help on the file above you will not see --test as
> expected. I'm curious as to why parse_args is still returning this as
> an option.

I'm guessing here - but it is *one* thing to disable an option for the 
user because of whatever condition, and another to remove the options 
default value that code could possibly rely on to work. So I'd say the 
behavior is sane.

Diez


From bignose+hates-spam at benfinney.id.au  Sat May 24 21:28:30 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:28:30 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
Message-ID: <87r6br9npd.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> Is it considered to be cheating if you make a test case which always
> fails with a "TODO: Make a proper test case" message?

I consider it so.

What I often do, though, is write a TODO comment in the unit test
suite:

    # TODO: test_frobnitz_produces_widget_for_znogplatz_input(self):

At which point I've got:

* A unit test suite that has the same number of tests.

* A comment that my editor will highlight, and that many tools are
  tuned to look for and flag for my attention (the "TODO:"
  convention).

* A description of what the test should be testing, as the name of the
  function that will implement the test. (This also forces me to think
  of exactly what it is I want to assert about the code's behaviour,
  by writing a test case name that embodies that assertion.)

* The beginnings fo the test case function itself, simply by removing
  the "# TODO: " part when I get around to that test case.

Then I get back to the work I was doing when that idea struck me,
knowing thaat it's recorded so I don't have to focus on it now.

> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

That depends, of course, on how hard they are to reproduce. But one
common technique is isolation via test doubles
<URL:http://xunitpatterns.com/Test%20Double.html>.

If you want to see how a specific unit of code behaves under certain
conditions, such as a disk failure, you're not interested in testing
the disk subsystem itself, only your code's behaviour. So you isolate
your code by having the unit test (often in a fixture) provide a "test
double" for the disk subsystem, and rig that double so that it will
predictably provide exactly the hard-to-get event that you what your
code to respond to correctly.

> A few examples off the top of my head:
> 
> * Code which checks for hardware defects (pentium floating point,
> memory or disk errors, etc).
> 
> * Code that checks that a file is less than 1 TB large (but you only
> have 320 GB harddrives in your testing environment).
> 
> * Code which checks if the machine was rebooted over a year ago.

All of these can, with the right design, be tested by providing a test
double in place of the subsystem that the code under test will
exercise, and making that test double provide exactly the response you
want to trigger the behaviour in your code.

> Also, there are places where mock objects can't be used that easily.
> 
> eg 1: A complicated function, which needs to check the consistency of
> it's local variables at various points.

That's a clear sign the function is too complicated. Break out the
"stages" in the function to separate functions, and unit test those so
you know they're behaving properly. Then, if you need to, you can
easily provide test doubles for those functions; or you may find you
don't need to once you know they're fully test covered.

> It *is* possible to unit test those consistency checks, but you may
> have to do a lot of re-organization to enable unit testing.

This results in more modular code with looser coupling (fewer
interdependencies between components). This is a good thing.

> In other cases it might not be appropriate to unit test, because it
> makes your tests brittle (as mentioned by another poster).
> 
> eg: You call function MyFunc with argument X, and expect to get result Y.
> 
> MyFunc calls __private_func1, and __private_func2.

If you've got name-mangled functions, that's already a bad code smell.
Not necessarily wrong, but that's the way to bet.

> You can check in your unit test that MyFunc returns result Y, but you
> shouldn't check __private_func1 and __private_func2 directly, even if
> they really should be tested (maybe they sometimes have unwanted side
> effects unrelated to MyFunc's return value).

Don't write functions with unwanted side effects. Or, if those side
effects are actually caused by other subsystems beyond your control,
test those functions with test doubles in place of the external
subsystems.

> eg: Resource usage.
> 
> How do you unit test how much memory, cpu, temporary disk space, etc
> a function uses?

This is beyond the scope of unit tests. You should be testing resource
usage by profiling the entire application, not in unit tests.

> eg: Platforms for which unit tests are hard to setup/run.
> 
>  - embedded programming. You would need to load your test harness into
> the device, and watch LED patterns or feedback over serial. Assuming
> it has enough memory and resources :-)
>  - mobile devices (probably the same issues as above)

Yes, it's unfortunate that some systems don't yet have good tools to
enable unit testing. Fix that, or pay others to fix it, because it's
in your best interests (and your customers's interests) to have unit
testing be as easy as feasible on all platforms that you target.

> eg: race conditions in multithreaded code: You can't unit test
> effectively for these.

Another good reason to avoid multithreaded code where possible. I find
that "it's really hard to deterministically figure out what's going
on" is reason enough to avoid it. If it's so hard to know the current
state of the system, it's therefore a poor choice, because I have no
good way to report to my customer how close I am to finishing the
implementation.

Others may have successfully achieved unit tests for conditions that
only arise in multithreaded code, but that's outside my experience.

-- 
 \     "How many people here have telekenetic powers? Raise my hand."  |
  `\                                                    -- Emo Philips |
_o__)                                                                  |
Ben Finney


From sebastian.noack at googlemail.com  Tue May 27 01:43:53 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Mon, 26 May 2008 22:43:53 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
Message-ID: <35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>

On May 27, 2:17 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> It's not a bug, you must extract the StringIO contents *after* closing
> tar_file, else you won't get the last blocks pending to be written.

I looked at tarfile's source code last night after I wrote this
message and figured it out. But the problem is that TarFile's close
method closes the underlying file object after the last block is
written and when you close StringIO you can not get its content
anymore. Wtf does it close the underlying file? There is absolute no
reason for doing this. Are you still sure this isn't a bug?

Regards
Sebastian Noack


From arnodel at googlemail.com  Fri May 16 10:09:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 07:09:29 -0700 (PDT)
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <eac249db-9b2c-4376-ba16-8bc92bac072d@p25g2000hsf.googlegroups.com>



rocco.ro... at gmail.com wrote:
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
>
> foo = some_function("foo")
>
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
>
> Thank you.

There are the globals() and locals() builtins.

>>> a = 42
>>> globals()['a']
42
>>>

--
Arnaud


From hdante at gmail.com  Mon May 19 11:53:11 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 08:53:11 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>

On May 19, 6:52?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Henrique Dante de Almeida a ?crit :
>
> > On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
> >> Hello.
>
> (snip)
> >> However, it is usually said that Python is not a compiled but
> >> interpreted programming language ?I mean, it is not like C, in that
> >> sense.
>
> (snip)
> > ?I guess that python is not a good language for that.
> (snip)
> > ?My opinion: choose compiled or byte compiled languages.
>
> Slightly OT (ie : not talking about computation-heavy alorgithm being
> better implemented in C then wrapped in Python - this seems quite
> obvious) but just a couple facts:
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.
>
> 2/ actually, all known Python implementations compile to byte-code.

 Yes, I was actually referring to statically typed JIT-compiled
languages. Sorry about that, blame the beers that entered my digestive
system that night. :-P


From robert.kern at gmail.com  Fri May 16 18:25:00 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 16 May 2008 17:25:00 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
Message-ID: <g0l1jt$vc$1@ger.gmane.org>

Marlin Rowley wrote:
> All:
>  
> I'm getting different floating point values when I use numpy vs. unpack().
>  
> frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> buffer = unpack("!f", byte)
>  
> frgba[0] != buffer[0]
>  
> why?  This is forcing me use the unpack() function since it's giving me 
> the correct values.  What am I doing wrong?

Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most 
likely, you are on a little-endian platform. All of the dtypes in numpy default 
to the native-endianness unless specified. If you want to read big-endian data 
using numpy, do this:

   frgba = numpy.frombuffer(<string of bytes>, dtype='>f')

If you have any more problems with numpy, please join us on the numpy mailing 
list. When reporting problems, please try to provide a small but complete 
snippet of self-contained code, the output that you got, and explain the output 
that you expected to get. Thank you.

   http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From hniksic at xemacs.org  Fri May 16 18:56:20 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Sat, 17 May 2008 00:56:20 +0200
Subject: Instance of class "object"
In-Reply-To: =?utf-8?Q?<cdb837ea=308=305=316=303=309g6ea5=31644nf23?=
	=?utf-8?Q?37bcddc34eb2=31@mail=2Egmail=2Ecom>=28=22=E7=94=9C=E7=93=9C=22=27?=
	=?utf-8?Q?smessage_of_=22Fri\=2C_=316_May_2=30=308_=318\=3A=309\=3A29?=
	=?utf-8?Q?=2B=308=30=30=22=29?=
References: <mailman.1214.1210927611.12834.python-list@python.org><8763tea9s
	d.fsf@mulj.homelinux.net><cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>
Message-ID: <873aoh7t9n.fsf@mulj.homelinux.net>

"??" <littlesweetmelon at gmail.com> writes:

>> # an efficient 'Pair' class holding two objects
>> class Pair(object):
>>    __slots__ = 'first', 'second'
>>
>> Instances of Pair take up even less room that 2-element tuples
>> because they don't carry the size information in the object.
>>
>> Now, if the object class carried a dict with it, it would be
>> impossible to create a class like 'Pair'.
>>
> Really interesting. When the tuple ('first', 'second') is assigning
> to __slot__, a special operation is done which makes __slot__
> pointing to a magic structure rather than a normal tuple. Am I
> right?

It's more like this: when the 'Pair' class is created, the class
creation mechanism notices that the class contain a __slots__ member.
It then uses that member as a specification for the layout of
instances of the 'Pair' type.  In this case, instead of a regular dict
(which can hold any number of attributes), Pair instances hold exactly
two attributes, as if[1] it had been declared as:

struct Pair {
  PyObject_HEAD       // type and refcnt, needed for Python
  PyObject *first;    // holds pair.first
  PyObject *second;   // holds pair.second
};

I'm not sure what you mean by "pointing to a magic structure rather
than a normal tuple", but without __slots__, the layout would be
roughly equivalent to:

struct Pair {
  PyObject_HEAD       // type and refcnt, needed for Python
  PyObject *dict;     // holds all pair attributes
};


[1]
I'm intentionally simplifying here, for example omitting weakrefs.


From duncan.booth at invalid.invalid  Mon May  5 06:24:00 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 May 2008 10:24:00 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>
Message-ID: <Xns9A9573FC740FBduncanbooth@127.0.0.1>

Szabolcs <szhorvat at gmail.com> wrote:

> On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> Gabriel Genellina wrote:
>>
>> > Python doesn't require __add__ to be associative, so this should
>> > not be 
> used as a general sum replacement.
>>
>> It does not _require_ this, but using an __add__ that is not
>> commutative and associative, or has side effects, would qualify as a
>> serious misuse, anyway.
> 
> Sorry, I meant associative only, not commutative.
> 
Unfortunately an __add__ which is not associative is actually perfectly 
reasonable. For example you could have a Tree class where adding two trees 
returns a new tree so (a+b)+c gives you:

    .
   / \
   .  c
  / \
  a  b

but a+(b+c) gives:

    .
   / \
   a  .
     / \
     b  c
   


From larry.bates at websafe.com`  Thu May 15 15:03:22 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 15 May 2008 14:03:22 -0500
Subject: Problem creating a shorcut
In-Reply-To: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>

Mike Driscoll wrote:
> Hi,
> 
> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
> 
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:
> 
> <code>
> 
> import win32com.client
> import winshell
> 
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
> 
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> Firefox'
> shortcut.save()
> 
> </code>
> 
> This creates the following target path (which doesn't work):
> 
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
> 
> If I leave the website off, it works. If I leave the path to Firefox
> out, it works too. Is there another method I can use other than
> creating the shortcut by hand and using the shutil module?
> 
> Thank you for any ideas.
> 
> Mike

Either you copied wrong or the problem is:

"C:\"C:\Program Files...


Note the C:\ is specified twice in the string.  I think it should read:

 > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
 > \www.myCompanyWebsite.com\auth\preauth.php"

-Larry


From arnodel at googlemail.com  Thu May  8 13:45:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 08 May 2008 18:45:48 +0100
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de> <fvv0cg$rsh$1@aioe.org>
Message-ID: <m24p98665v.fsf@googlemail.com>

pistacchio <pistacchio at gmail.com> writes:

>  ocalm forces you to di OOP

Ocaml *allows* you to do OOP. It's very much an optional feature of
the language, just like for Python.

-- 
Arnaud


From gherron at islandtraining.com  Fri May 23 03:36:20 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 23 May 2008 00:36:20 -0700
Subject: error using all()/numpy [TypeError: cannot perform reduce with
	flexible type]
In-Reply-To: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <483673F4.5090104@islandtraining.com>

Marc Oldenhof wrote:
> Hello all,
>
> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
>
> [start Python]
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>
>   
>>>> a=['1','2','3']
>>>> all(a)
>>>>         
> True
>   
>>>> from numpy import *
>>>> all(a)
>>>>         
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
>     return _wrapit(a, 'all', axis, out)
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
>     result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
>
> [end of example]
>
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
>
> Is there another way around this error?
>   

Yes, there are several solutions, but before that I'll say that "from 
... import *" is frowned upon for just this reason.   You have no 
control (and often no idea) what * ends up importing, and if any of 
those names overwrite an existing name (as you've found here), you may 
not notice.    (It's not quite fair to say "Python calls numpy's "all".  
*You* call it after you chose to replace Python's "all" with numpy's "all".)

Solutions:



Save Python's "all" first under another name:
    original_all = all
    from numpy import all
Now you can call all(...) or original_all(...).



The built-in (as they are called) are always available through __builtins__:
    from numpy import *
    all(...)  # is numpy's all
    __builtins__.all(...)  # Is the original all




Don't import *, but rather import only those things you need.
    from numpy import array, dot, float32, int32, ...
and if you need numpy's all
    from numpy import all as numpy_all


Gary Herron




> Marc
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gandalf at shopzeus.com  Tue May 20 10:22:46 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 20 May 2008 16:22:46 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <4831c608$0$14361$e4fe514c@news.xs4all.nl>
References: <mailman.1216.1210933005.12834.python-list@python.org>	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>	<mailman.1335.1211187990.12834.python-list@python.org>
	<4831c608$0$14361$e4fe514c@news.xs4all.nl>
Message-ID: <4832DEB6.1010909@shopzeus.com>


>
> - use simple file copying from a mounted network drive
Untrustable clients should not mount out anything from my server. (Also, 
it is not a protocol. I need to communicate with a real program, not 
just copying files.)
> - use http (web server)
I mentioned this before - don't know how to keep-alive with 
simplehttpserver. Similar solutions e.g. Apache + mod_python are too 
heavy weight. Too many dependencies etc.
> - use ftp
> - use scp
> - use rsync
>
> Why wouldn't one of these work for you? Did I miss something in your 
> original requirements?
Yes. I also need business logic on the server. Not just copying file. It 
happens that some of the messages will contain images.


Thank you for all your efforts. I think I'll go with TCPServer + xdrlib.


Laszlo





From goldnery at gmail.com  Fri May 23 13:02:47 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 10:02:47 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com>
Message-ID: <deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com>

On May 23, 6:25 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 10:45 am, Gandalf <goldn... at gmail.com> wrote:
>
> > How can i bind function that handle the mouse clicking  window X event
> > or clicking alt+F4
>
> > thanks
>
> You really need to learn to ask good questions. Unless people dive
> into your previous posts, they won't know what Python GUI toolkit you
> are using, which version of said toolkit, which Python or which OS.
>
> Here's a good place to read about events in general:
>
> http://wiki.wxpython.org/EventPropagation
>
> If you use Google, you can look for the close event, which gives you
> this:
>
> http://www.wxpython.org/docs/api/wx.CloseEvent-class.html
>
> So you'll want to bind your frame to EVT_CLOSE. You can disable the
> "X" in your frame's window by using non-standard style parameters.
>
> Mike

OK you right. I use WX on windows XP.
I didn't understood how to use this wx.CloseEvent function.

i really struggle with my poor english to understand this language, so
your help is crucial for my progress and i appreciate it

Thanks


From marlin_rowley at hotmail.com  Thu May 15 12:03:09 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:03:09 -0500
Subject: How do I use the unpack function?
Message-ID: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>


All:

I've got a script that runs really slow because I'm reading from a stream a byte at a time:

// TERRIBLE
for y in range( height ):
        for color in range(4):
            for x in range( width ):
                    pixelComponent = fileIO.read(4)
   
            buffer = unpack("!f",pixelComponent)  << unpacks ONE
float, but we now can do something with that pixel component.


I can speed this up dramatically if I did this:

// MUCH FASTER
for y in range( height ):
    for color in range(4):
   
   pixelComponent = fileIO.read(4*width)
<<<<<<<<<  GET a LOT more data from the
stream into memory FIRST!!
        for x in range( width ):
           buffer = unpack( ?????? ) <<<< how do I get each float from the pixelComponent???


-M
_________________________________________________________________
With Windows Live for mobile, your contacts travel with you.
http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008
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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:45:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:45:29 +0200
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <48367601$0$20550$426a74cc@news.free.fr>

George Maggessy a ?crit :
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python.

Welcome onboard then.

> So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern.

And ? Is there anything wrong with web-style MVC ?

> I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?

http://pylonshq.com/
http://www.djangoproject.com/
http://webpy.org/


From Avowkind at gmail.com  Tue May 27 18:04:18 2008
From: Avowkind at gmail.com (Avowkind)
Date: Tue, 27 May 2008 15:04:18 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>

On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
> (might not be the right forum for this but...)
>
> what is the definition of a highlevel-language?
>
> well there isnt one specifically and wikipedia and the like gives just
> a very general description obv you can say it abstracts away lowlever
> operations.
>
> yes but how?
>
> a function like map takes a function and applies it to a list for
> example.
> this abstracts away a common procedure like iterate through a list and
> for every position do a computation.
> so it is a higherorderfunction. is this how higher-level-languages are
> built?
>
> so are they fundamentally differently built or is it just a lot of
> lowlevel operations built on top of each other?
>
> haskell is considered a very highlevellanguage but can you do
> systemsprogramming with it(yes maybe it is very unpractical i dont
> know but can you)?
>
> is lambda calculus a more abstract and efficient way of modeling a
> computer? meaning you start at a higher level of abstraction and can
> work up to even higher even faster?
>
> how did lispmachines work? was the basic system programmed in LISP?


A lot of the previous comments have been about levels of abstraction
of the programming langauge - which may be the answer you want.
Another way of looking at it is that we want to be able to move from
the language of the solution domain - e.g. computers, bits and bytes
to the language of the problem domain.

When we think about 'level' we don't just want to look at how basic
statements work. we also need to think about whether the language is
capable of simply and clearly expressing the problem.

If your problem domain is mathematics then mathcad and its ilk are
near perfect high level programming languages as the programs look
just like the problems.

if your problem domain is controlling a water works then you may tend
to write your problem like this:

if the water level is over 10 metres then start pump
if the water level is below 5 metres then stop pump

which in python might turn out to be

if water_level > 10:
    pump.start()
if water_level < 5:
    pump.stop()

which is fairly close.
of course with the addition of some brackets C++ could be this clear
too. The key though is the abstraction given by the pump class and
implicitly by object oriented design.


In this pattern Form designers, visual web page layout tools and their
ilk are very high level - but only if your problem is that you need to
design a lot of business forms or web pages.  Some problems are best
described visually, some in text, some in mathematics.

Andrew.


From bignose+hates-spam at benfinney.id.au  Thu May 15 05:57:32 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 19:57:32 +1000
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
	<20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>
	<mailman.1141.1210823723.12834.python-list@python.org>
Message-ID: <87abiryjn7.fsf@benfinney.id.au>

"Terry Reedy" <tjreedy at udel.edu> writes:

> "John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
> news:20080514220126.e13d7cf1.johnjsal at NOSPAMgmail.com...
> | On Wed, 14 May 2008 12:58:12 -0400
> | "Terry Reedy" <tjreedy at udel.edu> wrote:
> |
> | > gmane.comp.python.general
> |
> | So that's the same as c.l.p.?
> 
> It is the same as python-list, which happens to be the same as c.l.p..

Which, to be clear, is a special case: the fact that the mailing list
'python-list' and the newsgroup 'comp.lang.python' interchange
messages, and are effectively the same forum, has nothing to do with
Gmane. That situation predates, and is unaffected by, the introduction
of Gmane.

-- 
 \        ?Good morning, Pooh Bear,? said Eeyore gloomily. ?If it is a |
  `\          good morning,? he said. ?Which I doubt,? said he. ?A. A. |
_o__)                                         Milne, _Winnie-the-Pooh_ |
Ben Finney


From grante at visi.com  Tue May 20 13:24:43 2008
From: grante at visi.com (Grant Edwards)
Date: Tue, 20 May 2008 12:24:43 -0500
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
	<g0u3c9$1fec$3@news.mtu.ru>
Message-ID: <BqadnXADgL7GlK7VnZ2dnUVZ_gednZ2d@posted.visi>

On 2008-05-20, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> On Mon, 19 May 2008 11:07:06 -0700, Vicent Giner wrote:
> [...]
>> 
>> By the way, is it possible (and easy) to call a C function from a Python
>> program??
>
> Yes.
>
> http://groups.google.com/group/comp.lang.python/msg/9d47913a265c348a

Even easier:

http://docs.python.org/lib/module-ctypes.html

-- 
Grant Edwards                   grante             Yow! I'd like some JUNK
                                  at               FOOD ... and then I want to
                               visi.com            be ALONE --


From hat at se-162.se.wtb.tue.nl  Wed May 21 11:13:58 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 21 May 2008 17:13:58 +0200
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
Message-ID: <slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>

On 2008-05-21, tdahsu at gmail.com <tdahsu at gmail.com> wrote:
> I'd appreciate any help.  I've got a list of files in a directory, and
> I'd like to iterate through that list and process each one.  Rather
> than do that serially, I was thinking I should start five threads and
> process five files at a time.
>
> Is this a good idea?  I picked the number five at random... I was

Depends what you are doing.
If you are mainly reading/writing files, there is not much to gain, since 1
process will already push the disk IO system to its limit. If you do a lot of
processing, then more threads than the number of processors is not much use. If
you have more 'burtsy' behavior (first do lot of reading, then lot of
processing, then again reading, etc), then the system may be able to do some
scheduling and keep both the processors and the file system busy.

I cannot really give you advice on threading, I have never done that. You may
want to consider an alternative, namely multi-tasking at OS level. If you can
easily split the files over a number of OS processes (written in Python), you
can make the Python program really simple, and let the OS handle the
task-switching between the programs.

Sincerely,
Albert


From ewertman at gmail.com  Wed May 21 12:40:27 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 21 May 2008 12:40:27 -0400
Subject: time module question - time zones
In-Reply-To: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>
References: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>
Message-ID: <92da89760805210940vc99afetc1c30d04d4cd9b24@mail.gmail.com>

Sorry, my time zone is +4, not minus 4, which means that something
else is causing my source data to be in the future.  I still do need
to understand where the time routines determine the time zone offset,
so I can be sure I'm passing around the neutral value.

Thanks!


On Wed, May 21, 2008 at 12:23 PM, Eric Wertman <ewertman at gmail.com> wrote:
> I tend to deal with dates a lot in different formats and places...
> typically I'll convert them to a time tuple with strptime(), and pass
> them around like that before I need to write them back out.
>
> One set of time/dates I'm getting are in UTC, but the string doesn't
> say that specifically.  So I do this..  I had expected the outcome to
> be offset properly (I'm EST5EDT).  But I'm obviously missing
> something:
>
> #!/usr/bin/env python
>
> import time
>
> utc_str = '2008-05-10 03:05:00 UTC'
>
> d = time.strptime(utc_str,'%Y-%m-%d %H:%M:%S %Z')
> t = time.mktime(d)
>
> print d
> print time.gmtime(t)
> print time.localtime(t)
>
> output :
>
> (2008, 5, 10, 3, 5, 0, 5, 131, 0)
> (2008, 5, 10, 8, 5, 0, 5, 131, 0)
> (2008, 5, 10, 4, 5, 0, 5, 131, 1)
>
>
> I believe that I should be getting (2008, 5, 9, 23, 5, 0, 5, 130, 1)
> out of one of those, since the original 3:05am time was UTC, and my TZ
> is currently -4.  Does that make sense?  I didn't even think I needed
> to do any business with time.localtime() and time.gmtime().  I
> expected  time.strftime() to return the locale appropriate time, but
> it didn't.
>
> TIA
>
> Eric
>


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:29:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:29:04 -0300
Subject: regarding process preemption in linux
References: <67eb1c790805192118l646fd5c4l681b196ade76b5d2@mail.gmail.com>
Message-ID: <op.ubg4qqbfx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 01:18:29 -0300, PARIMALA KALAVALA  
<parimala.kalavala at gmail.com> escribi?:

>      I am presently working on linux.
> I wanted to know how to view the preemption of one process by another
> process. If we give TOP command we are not able to visualize it or do we
> need to write any different code to see it or is it possible to see it in
> the proc file system.

I suggest you ask in a linux group. There is nothing Python specific in  
this question.

-- 
Gabriel Genellina



From michele.simionato at gmail.com  Tue May 13 23:57:29 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 13 May 2008 20:57:29 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <bc18d6b6-97f1-4dff-a9a8-181abc861de6@f63g2000hsf.googlegroups.com>

On May 13, 5:28 pm, Paul Miller <neokos... at gmail.com> wrote:
> Does anyone know of any (preferably largish) examples of literate
> programs written using Python?  Alternatively, does anyone know of any
> literate programming tools which support Python well?  (I am aware of
> Leo and I've been to literateprogramming.com, but any additional
> pointers would be much appreciated!)
>
> Thanks,
>
> Paul

You may be interested in this:
http://stacktrace.it/articoli/2008/01/geek-publishing/

(you may want to use the Google Translator, unless you know Italian).


From python at bc90021.net  Sun May 11 14:42:21 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 18:42:21 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
Message-ID: <h6HVj.32508$KJ1.28377@newsfe19.lga>

> It's difficult to know what's wrong with the code you posted because:
> 
> * it is not self-contained: otherFile, fileName, pattern are names
>   which you do not define;
> 
> * the IOError you reported earlier can't arise as a result of running
>   this code.
> 
> * you claim it works unless you put it in a subclass of
>   threading.Thread.  Why don't you post this instead, and show us the
>   traceback?
> 
> HTH
> 
> FWIW, my crystal ball (whose predictions I don't usually report!) tells
> me the same as Garry Herron's.

Here's the thread class:

#single file is the file we're working on, whose name is passed into the class and which does exist
#matrix is a list of lists that contains info about the files - for this example, [c][0] contains a string, [c][2] contains true or false, and [c][3] contains a pattern to match
#tfValue is another true or false value


class FileProcThread(threading.Thread):
	def __init__(self, singleFile, matrix, tfValue):
        	self.singleFile = singleFile
        	self.matrix = matrix
        	self.tfValue = tfValue
        	threading.Thread.__init__(self)
   	def run(self):
        	(dirName, fileName) = os.path.split(self.singleFile)
        	f = open(self.singleFile).readlines()
        	copying = False
        	for i in range(len(f)):
            		for c in range (len(self.matrix)):
                		if (re.search(self.matrix[c][3], f[i])):
                    			if (self.matrix[c][2] == True):
                        			copying = True
                        			if os.name == "posix":
                            				if (self.tfValue == False):
								tempfileName = "\"proctemp/" + self.matrix[c][0] + "_tmp_" + fileName + 
".txt\""
							else:
                                				tempfileName = "\"proctemp/" + self.matrix[c][0] + "_other.txt\""
                        			else:
                            				if (self.tfValue == False):
								tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_tmp_" + fileName + ".txt\""
                            				else:
								tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_other.txt\""
                    			else:
						copying = False
                		if (re.search(self.matrix[c][4], f[i])):
					copying = False
			if (copying):
                		print "We're in copying, and tempfileName is: %s...\n" % tempfileName
				#The above line correctly prints the temporary file name every time!  The directory exists, too!
		                g = open(tempfileName, 'a')  #This does not work.  Notice I do NOT have quotes around tempfileName, as I said.
		                g.write(f[i])
                		g.close()

Like I said, this works FINE outside the thread class.  I hope that the formatting comes through...


From exarkun at divmod.com  Mon May 12 11:54:47 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 11:54:47 -0400
Subject: Socket and cycle problem
In-Reply-To: <67c1d643-5445-46c8-b00f-20238badd398@56g2000hsm.googlegroups.com>
Message-ID: <20080512155447.6859.1735358497.divmod.quotient.62519@ohm>

On Mon, 12 May 2008 08:34:07 -0700 (PDT), petr.poupa at gmail.com wrote:
>Hello,
>I am beginner but so I need help. I have small script for receive data
>from port 3883, but it print only once.
>
>import socket
>
>HOST = 'localhost'
>PORT = 3883
>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>s.connect((HOST, PORT))
>data = s.recv(2048)
>s.close()
>print 'receive data from server:', `data`
>
>So I try to write cycle to this script, like this:
>
>import socket
>
>HOST = 'localhost'
>PORT = 3883
>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>while 1:
>    s.connect((HOST, PORT))
>    data = s.recv(2048)
>    s.close()
>    print 'receive data from server:', `data`
>
>But Python reporting:
>
>Traceback (most recent call last):
>  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
><module>
>    s.connect((HOST, PORT))
>  File "<string>", line 1, in connect
>  File "C:\Python25\lib\socket.py", line 141, in _dummy
>    raise error(EBADF, 'Bad file descriptor')
>error: (9, 'Bad file descriptor')
>
>Where is the mistake? I dont know.

You cannot reconnect a socket.  You need to create a new one for each
connection.  It's also almost certainly the case that the way you are
receiving data is incorrect.  There is no guarantee that you will get
2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
the bytes written to the socket by the peer will be returned by such
a call.  Instead, you need a framing protocol to determine when all
data has been received.  For example, you might length prefix the
data, or you might insert a delimiter (or a terminator) at the end.  Or
if there is exactly one message to receive, then you should just read
until the recv call returns '', indicating EOF.

Jean-Paul


From florencio.cano at gmail.com  Mon May 26 14:18:48 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Mon, 26 May 2008 20:18:48 +0200
Subject: Using Python to unit test C code
Message-ID: <c496e0a70805261118g16c1e7b7u71a7dd78408d2f43@mail.gmail.com>

Hi!
I would like to hear any information about how to unit test C code using Python.
Thanks!


From miller.paul.w at gmail.com  Mon May 26 01:02:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 22:02:39 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<dad8a839-1311-4aa4-af30-959a502f399c@2g2000hsn.googlegroups.com>
Message-ID: <e521d29d-761a-4a52-af52-b28e830126c7@m45g2000hsb.googlegroups.com>

On May 25, 11:05?pm, Benjamin <musiccomposit... at gmail.com> wrote:

> http://wiki.python.org/moin/TimeComplexityis a start.

Awesome.  That's pretty much what I was after!


From tonal at promsoft.ru  Wed May  7 03:07:35 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Wed, 07 May 2008 14:07:35 +0700
Subject: strftime() argument 1 must be str, not unicode
Message-ID: <48215537.100@promsoft.ru>

Subj is bag?

Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from datetime import datetime
 >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
'2008_05_07 12_30_22.csv'
 >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: strftime() argument 1 must be str, not unicode


From bbxx789_05ss at yahoo.com  Sun May 11 16:08:26 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:08:26 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<eb73ea38-9c7b-4e0f-99ca-e6b796004c1b@m36g2000hse.googlegroups.com>
Message-ID: <4ab8c284-7e07-4666-b2f5-123c52f02749@t54g2000hsg.googlegroups.com>

On May 11, 2:01?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 11, 1:28?pm, bc90021 <pyt... at bc90021.net> wrote:
>
>
>
> > > ...and the exact error message was?
>
> > > Here is a tip: if you want people to help you, then you have to help
> > > them to help you. ?Personally, I wouldn't respond to anymore of your
> > > questions because you seem incapable of posting the information that was
> > > requested.
>
> > So far, the people who have answered this post have gone on the
> > assumption that I'm stupid. ?I'm not. ?I took perfectly working code,
> > cut it from one class, and put it in another. ?It stopped working in the
> > second class. ?I've spent days on this and trust me, given what I've
> > experienced of the Python community so far, if I didn't have to ask, I
> > wouldn't.
>
> > (I really must say that so far the help I am getting in the Python
> > community is a big let down. ?Whether it's on IRC or here, everyone has
> > an arrogance that I don't find anywhere else in the open source
> > community, and it seriously makes me question the choice of language that
> > I've made.)
>
> > The error message was at the top of the thread (am I incapable of posting
> > it, or are you incapable of following a thread?), but here it is again:
>
> > IOError: [Errno 2] no such file u'tempfileName'
>
> Well, it appears to me that this error message is different than the
> one in your first post. ?But maybe I'm on LSD right now and things
> will be appear differently tomorrow.
>
> In addition, I've never seen a python error message that doesn't
> include the traceback, which you were asked to post, but apparently
> are still incapbable of doing. ?Also, any line numbers in the error
> message should be marked in your code with comments. ?That will help
> other people help you, remember?

In addition, posting the exact output from this:

>print "We're in copying, and tempfileName is: %s...\n" % tempfileName
> #The above line correctly prints the temporary file name every time!
> The directory exists, too!

would be helpful.

In addition, reducing your code to a simple 10 line example that
produces the same problem and that anyone can run would be helpful.
You might find that making the effort to produce a simple 10 line
example that mimics the problem, will actually result in your solving
the problem yourself.




From vadim.pestovnikov at gmail.com  Thu May  1 10:34:35 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:34:35 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
Message-ID: <675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>

On May 1, 10:30 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> > referenced symbol not found
>
> You need to link _psycopg.so with the math library, -lm.
>
> Regards,
> Martin

Martin, could you please tell me how to do this, I am pretty new in
Solaris.


From hyugaricdeau at gmail.com  Fri May  9 10:55:10 2008
From: hyugaricdeau at gmail.com (Hyuga)
Date: Fri, 9 May 2008 07:55:10 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <9058e146-1d86-46cb-befc-7b40f92e9511@k37g2000hsf.googlegroups.com>

On May 9, 5:10 am, dannywebs... at googlemail.com wrote:
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo').  I need to grab the previous
> iteration if this condition is met.  I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

Why is that so terrible?
previous = None
for key in mydict:
    if key.starswith('foo') and previous is not None:
        # ...do stuff...
    previous = key

Doesn't seem too ugly to me.

> Is there a mechanism whereby I can just index the dict value
> subscripts like in an array? I could just rewind by 1 if so.

You can't rely on the keys in a dictionary being in any specific
order.  But if you want a list of the keys you can just call
mydict.keys() which will give a copy of the dictionary's keys in a
list.  Then you can iterate that and use it however you would use any
other list.  Note that it's a copy though.  It might help if you
better explained exactly what you need to do.


From usenet1 at anton.e4ward.com  Sun May  4 12:32:27 2008
From: usenet1 at anton.e4ward.com (Anton81)
Date: Sun, 04 May 2008 18:32:27 +0200
Subject: Weird import problem
Message-ID: <fvkoer$2g7h$1@gwdu112.gwdg.de>

I have a directory structure like

NS/dir1/file1.py
NS/dir2/file2.py

if in the python shell I type

import NS.dir1.file1

it works, however typing

import NS.dir2.file2

fails with

ImportError: No module named dir2.file2

Any ideas what could go wrong?
Directory permissions seem to be OK.



From exarkun at divmod.com  Wed May  7 11:21:10 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 7 May 2008 11:21:10 -0400
Subject: listening on TCP port
In-Reply-To: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>
Message-ID: <20080507152110.6859.130552924.divmod.quotient.60093@ohm>

On Wed, 7 May 2008 08:03:35 -0700 (PDT), petr.poupa at gmail.com wrote:
>Hello,
>is there anybody who has experience with listening on TCP port with
>python? I am looking for anything codes, tutorials,... .
>Thanks for any information

Take a look at

 http://twistedmatrix.com/projects/core/documentation/howto/servers.html

which gives a brief overview of writing TCP servers with Twisted.

Jean-Paul


From castironpi at gmail.com  Sat May 17 11:16:41 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 08:16:41 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<PWmXj.46797$3v1.36691@bignews3.bellsouth.net>
	<72d09350-ba1b-4af4-8fc5-190b6888bbb6@y21g2000hsf.googlegroups.com>
Message-ID: <df503fcb-6ed2-4792-a7be-4a93b570e07f@j22g2000hsf.googlegroups.com>

On May 17, 3:52?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:23?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
> wrote:
>
>
>
>
>
> > globalrev wrote:
> > > pickle.dumps(mg)
> > > pickle.load(mg)
>
> > > 'dict' object has no attribute 'readline'
> > > dumps load(well i dont know but i get no complaint but running load
> > > generates that error)
>
> > The 'loads' and 'dumps' methods use strings:
>
> > ?>>> import pickle
> > ?>>> d = {"this": 42, "that": 101, "other": 17}
> > ?>>> s = pickle.dumps(d)
> > ?>>> s
> > "(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
> > ?>>> pickle.loads(s)
> > {'this': 42, 'other': 17, 'that': 101}
>
> > If you want to store to / restore from file, use 'dump' and 'load':
>
> > # write to file 'out'...
> > ?>>> f = open("out")
> > ?>>> f = open("out", "wb")
> > ?>>> pickle.dump(d, f)
> > ?>>> f.close()
>
> > # restore it later
> > ?>>> g = open("out", "rb")
> > ?>>> e = pickle.load(g)
> > ?>>> g.close()
> > ?>>> e
> > {'this': 42, 'other': 17, 'that': 101}
>
> > Also seehttp://docs.python.org/lib/pickle-example.html.
>
> > Hope this helps!
>
> > --Hans
>
> I want to compare that cleanliness with other languages to compare
> formats.
>
> Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
> pickle.load( 'out', 'rb' )?- Hide quoted text -
>
> - Show quoted text -

This is a check-in on live-time writing.  pickle.load didn't take two
parameters.


From marlin_rowley at hotmail.com  Sat May 17 16:34:38 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 15:34:38 -0500
Subject: how to use the transpose function in numpy?
Message-ID: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>

All:
 
Say I have a series of arrays arranged like so:
 
[[[0,1,2,3]
[4,5,6,7]
[8,9,10,11]
[12,13,14,15]]
 
[[16,17,18,19]
[20,21,22,23]
[24,25,26,27]
[28,29,30,31]]]
 
Now if I do this: transpose((2,0,1)), I get this:
 
[[[0,4,8,12] [16,20,24,28]]
[[1,5,9,13] [17,21,25,29]]
[[2,6,10,14][18,22,26,30]]
[[3,7,11,15][19,23,27,31]]]
 
This is NOT what I want.  I want the new array to be:
 
[0,4,8,12][1,5,9,13]
[2,6,10,14][3,7,11,15]
[16,20,24,28][17,21,25,29]
[18,22,26,30][19,23,27,31]
 
How do I do this?
 
-M
_________________________________________________________________
Make every e-mail and IM count. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ MakeCount
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From upton at virginia.edu  Thu May 15 20:07:51 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 20:07:51 -0400
Subject: send yield
In-Reply-To: <200805152005.52062.kyrie@uh.cu>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
Message-ID: <5504f9ac0805151707o1998d947sa210fc2aeec59712@mail.gmail.com>

On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
> On Thursday 15 May 2008 09:32:37 am castironpi wrote:
>> Why can't I write this?
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>
> yield recieved.
>
> Thanks.

Should that be

ack yield

?


From upton at virginia.edu  Mon May 12 22:36:53 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 12 May 2008 22:36:53 -0400
Subject: how to get information of a running prog in python
In-Reply-To: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805121936k1c835b20w8d59927d3e457004@mail.gmail.com>

On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0219 at gmail.com> wrote:
> Well, i know it may be a little non-python thing, however, I can think
>  of no place better to post this question :)
>
>  can anyone tell me, in python, how to obtain some information of a
>  running program?
>  paticularly, if i am playing some music in audacious or other media
>  player, how can i get the the name and some other info of current
>  playing song? It seems that audicious doesn't output on run-time
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>

In most cases, you'll probably need some sort of API, either in the
program itself or through some sort of plugin, that lets external
programs query it.  For instance, there are some plugins to WinAmp
that allow external programs (like Last.FM or Mog-O-Matic) to see what
track is currently playing.  You may also be able to do something like
get the window title (again, WinAmp's title bar usually includes the
artist and title) and parse it out.  I don't really know that there's
anything specific to Python for accessing these though, and it may
vary depending on media player.

Just my two cents...

-dan


From vivainio at gmail.com  Sun May 11 16:00:42 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 20:00:42 GMT
Subject: observer pattern  (notification chain synchronization)
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
	<mailman.871.1210342518.12834.python-list@python.org>
	<ajuVj.23627$5Y1.15331@trnddc04>
Message-ID: <87prrswqz7.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> OK, thanks.
>
> Another approach is to begin with a set of stocks
>
> and remove them as they report.  You can then trigger
>
> a report with the empty set instead of repeatedly
>
> calling ``all``. After a report the set can be
>
> "refilled".

Ah, and I obviously didn't read the whole thread before posting ;-)


From daveparker at flamingthunder.com  Mon May 19 22:51:41 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 19:51:41 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <90007ef4-0b1e-46ea-b8dc-116407e538af@q24g2000prf.googlegroups.com>

Your point about for-loops was applicable not only to Python, but to
many other programming languages.  So in response, I've added two new
for-loop variations to Flaming Thunder.

The two new variations are for-forever-do and for-expression-times-do.
For-forever allows you to explicitly create infinite loops, and for-
expression-times allows you to do something a specific number of times
without having to declare a looping variable if you don't need one.
Examples:

   Write "Fa".  For 8 times do write "-la".

   For forever do
     (
     Write "Do you know the definition of insanity? ".
     Read response.
     ).

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> isunPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?



From maxwell.newlands at gmail.com  Thu May 15 10:02:20 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 07:02:20 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
	<46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>
Message-ID: <974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>

On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > i currently have locations of the mp3s in question as strings, which
> > > works for parsing local files, but gives me a "No such file or
> > > directory" error when it tries to process URLs. ?it seems terribly
> > > inefficient to download each mp3 just to get at that small tag data,
> > > and i assume there's a way to do this with file() or open() or
> > > something, i just can't get it to work.
>
> > You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> > with ID3 V1 tags you'll have to download the file anyway because those are
> > in the last 128 bytes of an MP3 file.
>
> > Ciao,
> > ? ? ? ? Marc 'BlackJack' Rintsch
>
> Just don't import time. ?What would you do with an autolocking timer,
> such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> of a lady.

thanks guys.  i guess i just figured there'd be a way to get at those
id3 bytes at the end without downloading the whole file.  if java can
do this, seems like i should just stick with that implementation, no?


From ewertman at gmail.com  Sat May 24 10:07:49 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Sat, 24 May 2008 10:07:49 -0400
Subject: Python is slow
In-Reply-To: <g1947a$v28$1@news.mtu.ru>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
	<g1947a$v28$1@news.mtu.ru>
Message-ID: <92da89760805240707o41c580a8mdf99e5e0ceb4b8b5@mail.gmail.com>

> if python is such a good programming/scripting language, why can't they
> build a faster interpreter/compiler engine? and beat php and zend.
> to the python team, rebuild your interpreter!

while this is just a boring troll.. it does bring me to a more
interesting point... it would be cool if the interpreter were
multi-threaded to make better use of smp systems.  While you can do
threading, if you really want to drive more than one cpu some forking
is in order.


From bignose+hates-spam at benfinney.id.au  Sun May 18 21:38:37 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 19 May 2008 11:38:37 +1000
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <87abinjco2.fsf@benfinney.id.au>

cmoller <cmoller at dpbioventures.com> writes:

> I am new to Python and the use of discussion groups.

Welcome to both.

> Is there a FAQ for basic information so certain questions are not
> repeated?

Congratulations on asking this question; it puts you ahead of many
other first-time posters.

Python's official FAQ documents are on the Python site
<URL:http://www.python.org/doc/faq/>.

Despite its arrogant tone, the document "How to Ask Questions the
Smart Way" <URL:http://www.catb.org/~esr/faqs/smart-questions.html> is
a good guide for interacting well with technical discussion forums.

-- 
 \       "I bet one legend that keeps recurring throughout history, in |
  `\           every culture, is the story of Popeye."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From eric.hanchrow at gmail.com  Thu May  8 18:15:28 2008
From: eric.hanchrow at gmail.com (offby1)
Date: Thu, 8 May 2008 15:15:28 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
	<op.uas99gjvev04yd@melwxp23><fvu3rf$je4$1@news.xmission.com> 
	<op.uatraax1ev04yd@melwxp23>
	<mailman.808.1210280689.12834.python-list@python.org>
Message-ID: <c296ac55-ae33-454c-a694-21cd193131f9@s33g2000pri.googlegroups.com>

Been there, done that:
http://polyglot-anagrams.googlecode.com/svn/trunk/python/


From fc14301589 at icqmail.com  Tue May 27 04:21:01 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Tue, 27 May 2008 16:21:01 +0800
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <483bc46e_2@news.tm.net.my>

On 06:39, marted? 27 maggio 2008 Jean-Claude Neveu wrote:

> However, if I understand right, the Python poplib library will also
> parse the email for me so that I can iterate through the headers

See my program at http://it.geocities.com/call_me_not_now/index.html
You may study it.

But for short you can use

from email.Parser import HeaderParser
# then you can parse the mail, body etc here below

M = poplib.POP3('mail.blah.com')
M.user('username')
M.pass_('password')
numMsgs = len(M.list()[1])
for cnt in range(1, numMsgs +1):
    header= M.top(cnt,0)[1])

HTH


From netizen at gmx.de  Fri May 23 03:29:42 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 09:29:42 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
	<slrng3b383.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <scsc34la11kr9mpou8h09aifjnvq6680mh@4ax.com>

.oO(Nick Craig-Wood)

>Damon Getsman <dgetsman at amirehab.net> wrote:
>> PHP has great support for accessing a MySQL database,
>
>Actually I'd say PHP's mysql support is lacking a very important
>feature.  mysql_query() doesn't support parameters (or placeholders,
>usually '?')

Where were you the last couple of years? It's lacking a lot more
features, but that's not the fault of the MySQL extension, which is
quite old. Meanwhile we have the improved MySQL extension and PDO.

>It is not a big deal, but I've had it drummed into me to always use
>parameters for user input and I was really suprised PHP didn't have
>them.

PHP supports them since _years_, you just have to choose the right
database interface.

Micha


From deets at nospam.web.de  Tue May 27 08:50:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 14:50:23 +0200
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <6a2edeF356g4eU1@mid.uni-berlin.de>

David C. Ullrich wrote:

> What version added decorators (using the
> @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)
> 
> Is there a somthing such that "from __future__ import something"
> will make decorators work in 2.5.2?

They do work. They were introduced in python2.4

Diez


From straton at lampsacos.demon.co.uk  Mon May 19 09:31:51 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Mon, 19 May 2008 14:31:51 +0100
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <g0rvga$pki$1$8300dec7@news.demon.co.uk>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.
The vast majority of my Python work is Non-GUI.

As an example, this weekend, I wrote a script to help
in making a 'Lyrics' track in an audacity file, which
is (more-or-less) an XML variety.

In audacity, I created 'markers' in the file (as
the song played) at the start of each line. The result
was 'blank' markers at the correct times:

<labeltrack name="Lyrics" numlabels="25">

     <label t="18.50121034" t1="18.50121034" title=""/>

     <label t="24.34844390" t1="24.34844390" title=""/>

<!-- Etc -->
		
</labeltrackl>


My Python script took a text file, and inserted the words, as well
as a title for the whole song.


<labeltrack name="Lyrics" numlabels="26">
     <label t="0.25" t1="0.25" title="Katie Melua. 'Nine million 
bicycles in Beijing' "/>
     <label t="18.50121034" t1="18.50121034" title="There are nine 
million bicycles in Beijing,"/>
     <label t="24.34844390" t1="24.34844390" title="That&apos;s a fact,"/>
     <label t="27.12436227" t1="27.12436227" title="It&apos;s a thing we 
can&apos;t deny,"/>


<!-- Etc -->
		
</labeltrackl>


(The script used FourSuite)

You can do this in FourSuite itself, but it can be error-prone if
you miss out one.

I can this in 'Scite' a text editor which puts your input in one window, 
and the output in another. Scite is a text editor that comes free with
Ruby, by the way.


From castironpi at gmail.com  Thu May 15 22:27:14 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:27:14 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
Message-ID: <37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com>

On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
>
>
> > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > >> I'm cleaning up some old code, and want to see what orphan
> > >> functions might be sitting around.
>
> > >> Is there a static call tree analyzer for python?
>
> > > How about
> > >http://pycallgraph.slowchop.com/
>
> > > ...
> > > Jay Graves
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > Have you checked to see if PyChecker or pylint can help you?
> > Apparently they can find unused variables at least, I don't know
> > whether they do functions or not.
>
> I think of dynamic programming and dynamic code, but voice. ?Does that
> mean sing about it?- Hide quoted text -
>
> - Show quoted text -

I have to write a song.  Somebody?


From bj_666 at gmx.net  Mon May 19 05:07:46 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 09:07:46 GMT
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<69ckkgF31kls5U1@mid.uni-berlin.de>
	<acb42f90-a025-4b02-81fa-7ad0a8560665@26g2000hsk.googlegroups.com>
Message-ID: <69cub2F31kls5U2@mid.uni-berlin.de>

On Mon, 19 May 2008 00:14:25 -0700, sapsi wrote:

> Yes, that could be the case. Browsing through hadoop's source, i see
> stdin in the above code is reading from piped Java DataOutputStream.
> I read of a libray on the net Javadata.py that reads this but it has
> disappeared.
> What is involved in reading from a Dataoutputstream?

According to the Java docs of `DataInput` and `DataOutput` it is quite
simple.  Most methods just seem to write the necessary bytes for the
primitive types except `writeUTF()` which prefixes the string data with
length information.

So if it is not Strings you are writing then "hadoop" seems to throw in
some information into the stream.

Ciao,
	Marc 'BlackJack' Rintsch


From deets at nospam.web.de  Fri May 16 11:28:10 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 17:28:10 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
	<695crbF303jk4U1@mid.uni-berlin.de>
	<41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>
Message-ID: <695ngoF30u8tgU1@mid.uni-berlin.de>

Henrique Dante de Almeida schrieb:
> On May 16, 9:26 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>>  Did you consider gzipping your XML (or YAML) packets ? Would the
>>> transfer time be acceptable in this case ?
>> That would add even more to the overhead of transcoding the
>> transportlayer. Switching from XMLRPC to a json-based protocol reduced
> 
>  Yes, that's why I suggested YAML.
> 
>> in a project of mine reduced the overhead 10-20fold - mainly because of
>> reduced size and parsing efforts.
> 
>  I don't think so. It probably just the reduced size (check if the
> json file is around 10 times smaller).
> 
>  I believe the server will be mostly I/O-bound, ie, most overhead will
> be in the data link/physical layers. The compression/parsing time (a
> few microseconds) should be a small fraction of the total transfer
> time (a few milliseconds). Even if the service is not I/O bound,
> (considering the Youtube example) if there's significant traffic in
> the server, the database access time should be the most significant.
> 
>  I have used compression for SOAP messages in a GPRS (~20kbps) link
> and got similar performance improvements (the web server was set to
> automatically compress the data).

I'm sorry, yes - I forgot that the main problem was the pure message 
size due to some quadratic behaviour, which made things CPU-bound.

Still, XML-parsing is much more expensive, and packing/unpacking will of 
course add to that.

Diez


From mnordhoff at mattnordhoff.com  Tue May  6 15:00:22 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Tue, 06 May 2008 19:00:22 +0000
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
Message-ID: <4820AAC6.7050307@mattnordhoff.com>

Mike Driscoll wrote:
> On May 6, 8:44 am, jmDesktop <needin4mat... at gmail.com> wrote:
>> Studying OOP and noticed that Python does not have Interfaces.  Is
>> that correct?  Is my schooling for nought on these OOP concepts if I
>> use Python.  Am I losing something if I don't use the "typical" oop
>> constructs found in other languages (Java, C# come to mind.)  I'm
>> afraid that if I never use them I'll lose them and when I need them
>> for something beside Python, I'll be lost.  Thank you.
> 
> In my school, we didn't even discuss the concept of interfaces (except
> for CLI and GUI, that is). So I looked it up. I assume you are
> referring to something like what's found here:
> 
> http://java.sun.com/docs/books/tutorial/java/concepts/interface.html
> 
> If so, then it looks like an Interface is a generic class with method
> stubs. You can do that with Python just as easily by creating empty
> methods with just the "pass" keyword. It also reminds me of
> Decorators...so you might want to look at those.

Instead of just using "pass", you should "raise NotImplementedError".

>From the docs: "In user defined base classes, abstract methods should
raise this exception when they require derived classes to override the
method."

> Since it's just a construct to implement polymorphism, I don't think
> you'll lose anything. However, Python does not require you to re-
> implement every method of the class it is inheriting from. You can
> just override those that you want and leave the others alone.
> 
> Hopefully I understand this correctly...otherwise, just ignore my
> babbling and hand waving.
> 
> Mike
-- 


From dblubaugh at belcan.com  Wed May 14 11:20:57 2008
From: dblubaugh at belcan.com (Blubaugh, David A.)
Date: Wed, 14 May 2008 11:20:57 -0400
Subject: HASH TABLES IN PYTHON
Message-ID: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>

To Whom It May Concern,


I was wondering if anyone has ever worked with hash tables within the
Python Programming language?  I will need to utilize this ability for
quick numerical calculations.  


Thank You,


David Blubaugh




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From deets at nospam.web.de  Fri May  9 04:14:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 May 2008 10:14:03 +0200
Subject: Python GUIs and custom controls
In-Reply-To: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <68ifekF2sqbg2U1@mid.uni-berlin.de>

Joe P. Cool schrieb:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.

If you can work with the license (GPL), I suggest Qt4

Diez


From sayang-87 at docomo.ne.jp  Wed May 14 10:59:22 2008
From: sayang-87 at docomo.ne.jp (sayang-87 at docomo.ne.jp)
Date: Wed, 14 May 2008 23:59:22 +0900 (JST)
Subject: how to send files via bluetoot
Message-ID: <IMTX0lz70f7f54c10wos@docomo.ne.jp>




From frikker at gmail.com  Mon May 19 14:26:41 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 11:26:41 -0700 (PDT)
Subject: Thread output with ncurses
Message-ID: <d103c7c3-1e62-4390-ba85-7142b39c9b01@r66g2000hsg.googlegroups.com>

Hey everyone,
  I currently have three independent applications that all 'do
something' and output to the console when events are triggered.  I'd
like to combine these all into a single ncurses application.  The idea
would be that the application simply has three 'windows' or 'pads' and
each thread would output to their respective one.  What is the best
way to go about this? Would I want to use a pad or window? Is this
common functionality that is already implemented? (ie scrolling
textbox that is easily written to like the console is).

Any help or tips would be appreciated.  Thanks!
-Blaine


From gherron at islandtraining.com  Thu May  1 05:10:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 01 May 2008 02:10:45 -0700
Subject: Is vs Equality Operator
In-Reply-To: <706397.16040.qm@web35903.mail.mud.yahoo.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <48198915.3020804@islandtraining.com>

Good Z wrote:
> Hello,
> I am having problem in using is. Here is what i am doing.

Short answer:  Use == for equality.    Don't use "is".  Ever!  
(Especially if you are a newbie.)

Longer answer:  In a dozen years of programming Python, the only time I 
use "is" is when testing for something like 
  if x is None
but, even then
  if x == None
works just as well, and in any case, there is usually a better way.  
(See below.)

Don't use "is" until you can explain the following
 >>> 11 is 10+1
True
 >>> 100001 is 100000+1
False


>
> x=''
> if x is None or x is '':
>         return 1

Both None and an empty string (and empty lists, empty dictionaries, 
empty sets, and numeric values of 0 and 0.0) all evaluate a False in an 
if statement, so the above if statement can be written as

  if not x:
      return 1

If you have to test for None, just do
  if not x:

If you have to differentiate between a value of None and something that 
evaluates to False (e.g., and empty list) then do
  if x is None:
    # handle None explicitly
  elif not x:
    # handle empty list

>
> The above statement does not return value 1.
>
> If i changed the above check to
> if x == None or x == '':
>         return 1
> Now it works fine.
>
> Any idea. What is happening here. I am using python 2.4.4 on ubuntu.
>
> Mike
>
> ------------------------------------------------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try 
> it now. 
> <http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From notnorwegian at yahoo.se  Sat May 24 00:52:57 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 21:52:57 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
Message-ID: <8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>

On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> notnorweg... at yahoo.se writes:
> > when running a very computationalheavy program in the shell it
> > sometimes freezes but the commandprompt runs it without problems
>
> Can you tell us exactly which programs you mean when you say "the
> shell" and "the commandprompt"?
>
> --
>  \      "One seldom discovers a true believer that is worth knowing."  |
>   `\                                               -- Henry L. Mencken |
> _o__)                                                                  |
> Ben Finney

commandprompt = windows dos-windows

shell = standard python interactive prompt


From subhabrata.iisc at hotmail.com  Wed May 28 04:15:22 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 01:15:22 -0700 (PDT)
Subject: Problem with py2exe
Message-ID: <114d8694-0d1d-4917-809d-a3d7b6443487@j33g2000pri.googlegroups.com>

Dear Members of the group,
py2exe does not seem to be integrating with 2.5 or later versions.
I was trying to run it but requested only for 2.3.
How can I run it?
If any one can kindly help.
Regards,
Subhabrata Banerjee.


From cmoller at dpbioventures.com  Sun May 18 20:34:29 2008
From: cmoller at dpbioventures.com (cmoller)
Date: Sun, 18 May 2008 17:34:29 -0700 (PDT)
Subject: New to Python, Discussion Groups.
Message-ID: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>

Hi,

I am new to Python and the use of discussion groups. Is there a FAQ
for basic information so certain questions are not repeated?

I am NOT an experienced programmer, but have decided to write a data
logger for sensors sending data via an internal ethernet work to
machines running OS X (Intel). The program should store data and allow
real time plotting. It does not need a beautiful GUI, but I may want
to share the program with others, so it should be somewhat intuitive.
It looks like I could use Python to access MS Excel, which would
significantly reduce the effort, but I am not sure if this is
practical. I am not in a hurry and would approach the problem as a way
to learn.

The data I am processing is readily seen via telnet so I know it's
there.

Is Python a good choice or should I invest in learning a language well
known to be best for applications like this? Are there other key
topics in addition to network programing that I should be focusing on?


Thanks,

Chris


From kamhung.soh at gmail.com  Tue May 13 23:04:39 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 14 May 2008 13:04:39 +1000
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
Message-ID: <op.ua4it2jtev04yd@melwxp23>

On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:

> Gabriel Genellina wrote:
>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca>  
>> escribi?:
>>
>>> Collin wrote:
>>>> I'm pretty new to Python, but this has really bugged me. I can't find  
>>>> a
>>>> way around it.
>>>>
>>>>
>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>
>>>> Any help would be appreciated. Thanks.
>>>
>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>  No need to apologize...
>>
>>> I read the error message just now a bit more carefully, and I tried
>>> something. I tried defining "yes" as some random numerical value. Then
>>> when I did:
>>> (example code)
>>>
>>> yes = 123123983 #some number
>>> test = input("Test test test ")
>>> if test == yes:
>>> 	print "It worked."
>>> else:
>>> 	print "failed"
>>>
>>> (example code off)
>>  The usual way for Python<3.0 is:
>>  answer = raw_input("Test test test ").lower()
>> if answer == "yes":
>>      ...
>>  The input() function evaluates user input as an expression: if he  
>> types 2+5 the input() function returns the integer 7. I would never use  
>> input() in a program - it's way too unsafe; use always raw_input  
>> instead.
>>
>
> If I use it like that, do I have to import anything to have the .lower()  
> work? And if I do, what does the .lower() signify?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You don't need to import any module to use ".lower()"; it is a method of a  
string.  raw_input() returns a string, so you can use methods of a string.

Try the following statement to see what happens:
"ABCDE".lower()

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From alokkat at gmail.com  Wed May 28 00:13:33 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 00:13:33 -0400
Subject: Struct usages in Python
Message-ID: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>

Dear All,

This might be very basic question for python, but I have been struggling
with it.  Your help will be highly appreciated.

I have a class like below:

class Event():

   def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
clrTime=""):

     self.cameraEventType = cameraEventType

     self.zone = zone

     self.setDay = setDay

     self.setTime = setTime

     self.clrTime = clrTime

I want to use array of Event class object in another class like below:

class EventTimeFilter:

   def __init__(self):
           self.event[] = Event()   *# Seems this is not allowed ?? *

Can someone help me how can I use array of Event object in EventTimeFilter
class. I planned to fill array of Event object in EventTimeFilter class
method.

Thanks in advance.

Regards
Alok
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From Joshuajruss at gmail.com  Tue May 13 09:46:04 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Tue, 13 May 2008 06:46:04 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
Message-ID: <ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>

Any programming that helps you solve a problem is fun and
recreational. At least, that's how I look at it. I suppose it really
depends on why you're doing it, what your objective is, etc. But I'd
say, why not?

Tron! That's one I haven't seen in awhile. I'll have to take a mental
note to rent the movie again someday. I always thought a game based on
the movie hackers would be cool. Actually not based on the movie
itself, but on that 3D computer world they kept breaking into. Ah man,
it's so funny looking back on that film. Gibson, that's what they
called it. It was like a 3D database. That in itself wouldn't make a
very good game, but I suppose one could easily be created around that
idea. Perhaps it could be combined with Lawnmower-man. You're somehow
trapped in this 80's looking 3D world that has access to all the
world's information. More stuff could be thrown in to make it more
interesting. And of course, there would have to be hidden references
or parodies to whatever movies inspired it.

Good luck with your project

Sincerely,
Joshua


On May 13, 9:02?am, castiro... at gmail.com wrote:
> Hi all.
>
> I am trying to write to the Python newsgroup. ?I doubt (aha, but
> doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> this the Python newsgroup? ?I heard it was called comp.lang.python.
> Now to repeat the subject line. ?I'm stuck in Python.
>
> Now that was fun. ?I will also try to enumerate simple screen savers
> (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> breaking scale to compile the results. ?Shall I proceed? ?The risk is
> "overunity", such that one person can't be at liberty to live, which
> in some technical political arenas would be an "anarchy", but there
> are sufficiently many of those that I will too.
>
> Does anyone want such a list, or if not, is it at least fun and
> recreational to make it? ?The dollar would come along the lines of
> PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> and peaceable. ?(As the above would show, you would be free to
> approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> Guido getting his fair share? ?I am prepared to share with him.)
> Check in his name.
>
> I want to try to ally with other programmers and make cool games, like
> Tron, that one party can make games for on a console, such as live
> obstacles, incl. tear-down, and certain people have to play from time
> to time. ?But you can't charge to do it, so it's a guaranteed game.
> (That in virtue of that I'm typing.) ?Advantages include microspacing
> of time. ?Very summer.
>
> Resemblances would include Dungeons & Dragons with multi-host, or
> multi-ref small-shooter sport-likers. ?The real-time is definitely
> attractive (duh). ?As for voice, it's not clear it's the most
> entertaining, but I just don't have a mic.
>
> However, forseeing, I return with sailing, but that's in 3-space and
> not even in code, as though we'd construct the Royal Navy and battle.
> But I think we can keep it well.
>
> Thing is, someone has to play it to keep a synch (keep from falling),
> and tap-outs would have to live.
>
> Side note: In political theory, this is known as the problem of
> nominating a successor. ?Would it stay afloat, even for long enough to
> make it worth the negatives, yes which do include tear-down and fall,
> invasion of privacy, and rights infrigement?
>
> I code in Python (get the callbacks), but configurable servers could
> spread the work out, using relays to put each person on each's own
> turf to be a ref. ?If you feed the roles, it could get really fun, and
> c-l-py is the appropriate place to start such a thing, both and ask if
> it's been done before.



From info at thegrantinstitute.com  Tue May 20 03:28:23 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 20 May 2008 00:28:23 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Manchester,
	New Hampshire)
Message-ID: <20080520002823.B4A9F3FDD99F568E@thegrantinstitute.com>

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From marco at sferacarta.com  Thu May 15 06:49:33 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 15 May 2008 12:49:33 +0200
Subject: python newbie: some surprises
In-Reply-To: <3c0c.482c0fc1.3224e@altium.nl>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
	<3c0c.482c0fc1.3224e@altium.nl>
Message-ID: <3zUWj.44548$o06.42475@tornado.fastwebnet.it>

Kees Bakker wrote:


> So far, I have seen only one editor that understands the difference between
> TABs and indentation, and that is Emacs.

Oh, well... in .vimrc:

     autocmd FileType python set tabstop=8
     autocmd FileType python set softtabstop=4
     autocmd FileType python set expandtab



From castironpi at gmail.com  Wed May 14 20:40:55 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 17:40:55 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>
Message-ID: <3ec3bdb4-b3ac-4ca2-b22a-1746f24d8195@b1g2000hsg.googlegroups.com>

On May 14, 1:06?pm, castiro... at gmail.com wrote:
> On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > you can safely ignore its posts.
>
> > > > > > > How does it generate text?
>
> > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > However you know what would be helpful? ?If I could go to the right
> > > > > place to start the ring.
>
> > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > I'd stay on mutability for the world domination factor. ?Fluent
> > > currency is buoyant currency; turn on a local clock, and someone gets
> > > some cubic verticals.
>
> > > Now if sense-reference is trading on the BDFL, I'm still holdingTron
> > > can pretty well win work.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have a self-referential on Pygame: it's a Hand Tool object.
> > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > - Show quoted text -
>
> If Python can plot in to chess, andTronrings live, then why not group?

I am taking a cautious tack on this one: I'm starting mouse first,
self.x+= sin( radians( self.degrees ) ).


From ivan.illarionov at gmail.com  Mon May 12 01:18:37 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 05:18:37 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <g08jvd$2k0g$1@news.mtu.ru>

>> In such cases, the name 'dummy' is conventionally bound to the items
>> from the iterator, for clarity of purpose
[..]
> If a value isn't used, then I think the most clear name for it is
> "unused".
[...]

Maybe my brain works differently, but I find both "dummy" and "unused" 
are extremely confusing names for loop counters. The loop begins to look 
like it doesn't iterate at all if its counter is dummy or unused.

If it *counts* it is *used* and it's *not* dummy.

Why reinvent the wheel when "a common identifier naming convention is for 
the loop counter to use the variable names i, j and k (and so on if 
needed)" (from Wikipedia http://en.wikipedia.org/wiki/Loop_counter )

-- Ivan


From jaywgraves at gmail.com  Thu May 15 17:19:17 2008
From: jaywgraves at gmail.com (jay graves)
Date: Thu, 15 May 2008 14:19:17 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
Message-ID: <13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>

On May 15, 3:47 pm, m... at pixar.com wrote:
> I'm cleaning up some old code, and want to see what orphan
> functions might be sitting around.
>
> Is there a static call tree analyzer for python?

How about
http://pycallgraph.slowchop.com/

...
Jay Graves


From pupeno at pupeno.com  Fri May 16 03:32:21 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Fri, 16 May 2008 00:32:21 -0700 (PDT)
Subject: ElementTree and DTDs
References: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>
Message-ID: <17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>

Or is there another library that would handle DTDs correctly,
performing entity replacements?

Thanks.

On May 16, 12:20?am, J. Pablo Fern?ndez <pup... at pupeno.com> wrote:
> Hello,
>
> Is ElementTree supposed to load DTDs? I have some xmls heavy on
> entities and it fails this way:
>
> Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42)
> [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> filename = "revo/xml/a.xml"
> >>> import xml.etree.ElementTree as ET
> >>> ET.parse(filename)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 862, in
> parse
> ? ? tree.parse(source, parser)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 586, in
> parse
> ? ? parser.feed(data)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in
> feed
> ? ? self._parser.Parse(data, 0)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1201, in
> _default
> ? ? self._parser.ErrorColumnNumber)
> xml.parsers.expat.ExpatError: undefined entity &jcirc;: line 13,
> column 10>>> import xml.etree.cElementTree as ET
> >>> ET.parse(filename)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "<string>", line 45, in parse
> ? File "<string>", line 32, in parse
> SyntaxError: undefined entity &c_j;: line 46, column 17
>
> Thanks.



From marco at sferacarta.com  Wed May  7 08:24:34 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:24:34 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <Xns9A9786AA544CEduncanbooth@127.0.0.1>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
Message-ID: <9chUj.34561$o06.23748@tornado.fastwebnet.it>

Duncan Booth wrote:

> It does this:
> 
>>>> @greedy
> def getCommandsFromUser():
> 	while True:
> 		yield raw_input('Command?')
> 
> 		
>>>> for cmd in getCommandsFromUser():
> 	print "that was command", cmd
> 
> 	
> Command?hello
> Command?goodbye
> that was command hello
> Command?wtf
> that was command goodbye
> Command?


Not here..


In [7]: def getCommandsFromUser():
         while True:
                 yield raw_input('Command?')
    ...:
    ...:

In [10]: for cmd in getCommandsFromUser(): print "that was command", cmd
    ....:
Command?hi
that was command hi
Command?there
that was command there
Command?wuwuwuw
that was command wuwuwuw
Command?


From bignose+hates-spam at benfinney.id.au  Sat May 24 09:58:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 23:58:22 +1000
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <8763t3by81.fsf@benfinney.id.au>

Sh4wn <luckyluke56 at gmail.com> writes:

> first, python is one of my fav languages, and i'll definitely keep
> developing with it. But, there's 1 one thing what I -really- miss:
> data hiding. I know member vars are private when you prefix them with
> 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> before it.

>From whom are you trying to hide your attributes?

In Python, the philosophy "we're all consenting adults here" applies.
You shouldn't pretend to know, at the time you write it, all the uses
to which your code will be put. Barriers such as enforced "private"
attributes will only cause resentment when people, despite your
anticipations, *need* to access them and are then forced to hack their
way around them.

If you want the users of your code to know that an attribute should
not be used as a public API for the code, use the convention of naming
the attribute with a single leading underscore. This is a string
signal that the attribute is part of the implementation, not the
interface. The reader is then on notice that they should not rely on
that attribute; but they are not *prohibited* from using it if
necessary to their ends.

> Python advertises himself as a full OOP language, but why does it
> miss one of the basic principles of OOP?

Who taught you that enforced restrictions on attribute access was a
"basic principle" of OO?

Perhaps you're confusing the "encapsulation" and "abstraction"
principles for enforced access restrictions; they're not.

> Will it ever be added to python?

I hope not.

-- 
 \            "Why was I with her? She reminds me of you. In fact, she |
  `\             reminds me more of you than you do!"  -- Groucho Marx |
_o__)                                                                  |
Ben Finney


From artasis at gmail.com  Wed May  7 05:11:42 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Wed, 7 May 2008 02:11:42 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
	<68as2qF2r15d8U1@mid.uni-berlin.de>
Message-ID: <429872ac-b161-4f81-8a4a-f30129f84580@34g2000hsh.googlegroups.com>

On May 6, 3:00 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> arta... at gmail.com wrote:
> > Hi, that is my task:
> > I need to create python webserver-like extension(dll) which will run
> > php and python scripts as plugins.
> > I have no problems with dll creating and run python scripts, but I
> > cannot understand how to run php(CLI is not a solution).
> > Is there a way to solve this problem? I've thought to implement php to
> > HTTPServer-like python module, but as I see it's impossible. Solutions
> > with creating intermediate C-based module is allowed, but better
> > without them :).
> > AFAIK, php5ts.dll is that what I must use but how integrate it to
> > python webserver? that is a question
>
> http://www.amazon.com/Extending-Embedding-PHP-Developers-Library/dp/0...
>
> Might be of help.
>
> And maybe the roadsend PHP-compiler.
>
> Diez
thanks! great book! this would help with Jeff recommendations to use
ctypes



From george.sakkis at gmail.com  Sat May 10 03:43:22 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 10 May 2008 00:43:22 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com> 
	<g0347n$404$1@news.xmission.com>
Message-ID: <061f6688-619f-4da5-a09d-533eefcde716@m45g2000hsb.googlegroups.com>

On May 9, 11:19?pm, dave <squareswallo... at 1ya2hoo3.net> wrote:
> On 2008-05-09 18:53:19 -0600, George Sakkis <george.sak... at gmail.com> said:
>
>
>
> > On May 9, 5:19?pm, umpsu... at gmail.com wrote:
> >>>> What would be the best method to print the top results, the one's that
>
> >>>> had the highest amount of anagrams?? ?Create a new histogram dict?
>
> >>> You can use the max() function to find the biggest list of anagrams:
>
> >>> top_results = max(anagrams.itervalues(), key=len)
>
> >>> --
> >>> Arnaud
>
> >> That is the biggest list of anagrams, what if I wanted the 3 biggest
> >> lists? ?Is there a way to specific top three w/ a max command??
>
> >>>> import heapq
> >>>> help(heapq.nlargest)
> > Help on function nlargest in module heapq:
>
> > nlargest(n, iterable, key=None)
> > ? ? Find the n largest elements in a dataset.
>
> > ? ? Equivalent to: ?sorted(iterable, key=key, reverse=True)[:n]
>
> > HTH,
> > George
>
> I both the 'nlargest' and the 'sorted' methods.. I could only get the
> sorted to work.. however it would only return values like (3, ?edam)
> not the list of words..
>
> Here is what I have now.. Am I over-analyzing this? ?It doesn't seem
> like it should be this hard to get the program to print the largest set
> of anagrams first...
>
> def anafind():
> ? ? ? ? fin = open('text.txt')
> ? ? ? ? mapdic = {}
> ? ? ? ? finalres = [] ? ? ? ? ? ? ? ? ? # top answers go here
> ? ? ? ? for line in fin:
> ? ? ? ? ? ? ? ? line = line.strip()
> ? ? ? ? ? ? ? ? alphaword = ''.join(sorted(line)) ? ? ? #sorted word as key
> ? ? ? ? ? ? ? ? if alphaword not in mapdic:
> ? ? ? ? ? ? ? ? ? ? ? ? mapdic[alphaword] = [line]
> ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? mapdic[alphaword].append(line)
> ? ? ? ? topans = sorted((len(mapdic[key]), key) for key in mapdic.keys())[-3:]
> ? #top 3 answers
> ? ? ? ? for key, value in topans: ? ? ? #
> ? ? ? ? ? ? ? ? finalres.append(mapdic[value])
> ? ? ? ? print finalres

Here is a working, cleaned up version:

from heapq import nlargest
from collections import defaultdict

def anagrams(words, top=None):
    key2words = defaultdict(set)
    for word in words:
        word = word.strip()
        key = ''.join(sorted(word))
        key2words[key].add(word)
    if top is None:
        return sorted(key2words.itervalues(), key=len, reverse=True)
    else:
        return nlargest(top, key2words.itervalues(), key=len)

if __name__ == '__main__':
    wordlist = ['live', 'evil', 'one', 'nose', 'vile', 'neo']
    for words in anagrams(wordlist,2):
        print words


By the way, try to generalize your functions (and rest of the code for
that matter) so that it can be reused easily. For example, hardcoding
the input file name in the function's body is usually undesirable.
Similarly for other constants like 'get top 3 answers'; it doesn't
cost you anything to replace 3 with 'top' and pass it as an argument
(or set it as default top=3 if that's the default case).

HTH,
George


From workitharder at gmail.com  Wed May 21 14:59:59 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 11:59:59 -0700 (PDT)
Subject: What replaces `` in py3k?
References: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>
	<0ef180ba-6c67-425d-84c3-0b697cde27ea@v26g2000prm.googlegroups.com>
Message-ID: <3370b8e7-09cd-4447-8db3-9301d51b5f0e@d77g2000hsb.googlegroups.com>

On May 21, 10:48 am, Jonathan Gardner <jgard... at jonathangardner.net>
wrote:
> On May 21, 10:45 am, bukzor <workithar... at gmail.com> wrote:
>
> > What are backticks going to be translated into?
>
> repr

Thanks for the quick reply!
--Buck


From attn.steven.kuo at gmail.com  Wed May  7 21:43:57 2008
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Wed, 7 May 2008 18:43:57 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <1d78290f-d78d-4668-aa47-896847c75607@n1g2000prb.googlegroups.com>

On May 7, 6:13 pm, Miles <semantic... at gmail.com> wrote:

(snipped)

>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
>
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
>  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)
>
>  This isn't incredibly efficient, but it does what you want (I think):
>
>  from itertools import chain
>
>  class multisliceable(list):
>   def __getitem__(self, slices):
>     if isinstance(slices, (slice, int, long)):
>       return list.__getitem__(self, slices)
>     else:
>       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
>                           else [list.__getitem__(self, s)] for s in slices]))
>
>  p = open('/etc/passwd')
>  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]
>
>  -Miles



There's also the operator module:

import itertools
import operator

idx = [one for one in itertools.chain([0], range(2, 6))]

wanted = operator.itemgetter(*idx)

q = [wanted(line.strip().split(':')) for line in file("/etc/passwd")]

--
Hope this helps,
Steven


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 03:38:12 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 09:38:12 +0200
Subject: Fill memeory with endless loop?
In-Reply-To: <go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
	<go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
Message-ID: <482a96de$0$9868$426a74cc@news.free.fr>

Tim Roberts a ?crit :
> globalrev <skanemupp at yahoo.se> wrote:
>> and when the program get skiled because out of memory all this will be
>> deleted from the memory?
> 
> Yes.  When a process is killed, all of the memory it was using is released.
> 
>> so there is no way that you can, by accident, fill your whole
>> harddrive and make it unusable?
> 
> Of course not.  Where do you see a connection between memory and your hard
> drive?

swap.

But that won't "fill your whole harddrive", indeed !-)



From castironpi at gmail.com  Tue May 13 07:24:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:24:00 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com> 
	<mailman.1045.1210677569.12834.python-list@python.org>
Message-ID: <86cac3e7-bf1f-4989-a2d9-90ad02c8d083@d45g2000hsc.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:46:45 -0300, <dannywebs... at googlemail.com> escribi?:
>
> > On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> >> Hi - I have a list returned from popen/readlines, and am wondering how
> >> to go about iterating over each item which was returned (rather than
> >> currently having the whole lot returned).
>
> >> >>> f=os.open("./get_hostnames").readlines
>
> > I did indeed mean "os.popen", no "os.open"
>
> Ouch, replace open with popen an my example is valid (but to get the ?
> meaning I intended to write, replace os.open with open...)
>
> --
> Gabriel Genellina

Yes: fine!  But, all we do is start a Tron ring, play Tron on
laptops.  You have micro-divide currency, you can probably make
musicals -too-; and I don't have enough to say to get this...

BE TALKING!


From davidj411 at gmail.com  Fri May 23 16:36:55 2008
From: davidj411 at gmail.com (davidj411)
Date: Fri, 23 May 2008 13:36:55 -0700 (PDT)
Subject: csv iterator question
Message-ID: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>

When you save an open file to a variable, you can re-use that variable
for membership checking.
it does not seem to be that way with the csv.reader function, even
when set to a variable name.

what is the best way to store the open CSV file in memory or do i need
to open the file each time?

example of open method on file object:
fhandle=open(filename).readelines()

example of csv.reader method:
reader = csv.reader(open(csvfilename))


here are my results:
>>> reader = csv.reader(open('export.csv'))
>>> for line in reader:
...  print line


<lots of data on page...>

but when i try to iterate through it again, it appears to print
nothing (no error either). the file is exhausted?

>>> for line in reader:
...  print line
...

do i need to seek() the beginning of this file object ? any help is
greatly appreciated here.


From bronger at physik.rwth-aachen.de  Tue May  6 11:56:43 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 06 May 2008 17:56:43 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <87iqxrfmtg.fsf@physik.rwth-aachen.de>

Hall?chen!

jmDesktop writes:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

See also http://www.python.org/dev/peps/pep-3119/

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From arkanes at gmail.com  Wed May 21 17:41:09 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 21 May 2008 16:41:09 -0500
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
Message-ID: <4866bea60805211441x7a9f359bv8bf675cd825f9ea7@mail.gmail.com>

On Wed, May 21, 2008 at 4:29 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 3:17 pm, "Chris Mellon" <arka... at gmail.com> wrote:
>
>> If you're going to use every post and question about Python as an
>> opportunity to pimp your own pet language you're going irritate even
>> more people than you have already.
>
> Actually, I've only posted on 2 threads that were questions about
> Python -- this one, and the one about for-loops where the looping
> variable wasn't needed.  I apologize if that irritates you.  But maybe
> some Python users will be interested in Flaming Thunder if only to
> check the accuracy of the results that they're getting from Python,
> like I did on this thread.  I think most people will agree that having
> two independent programs confirm a result is a good thing.
> --

Please don't be disingenuous. You took the opportunity to pimp your
language because you could say that you did this "right" and Python
did it "wrong". When told why you got different results (an answer you
probably already knew, if you know enough about IEEE to do the
auto-conversion you alluded to) you treated it as another opportunity
to (not very subtly) imply that Python was doing the wrong thing. I'm
quite certain that you did this intentionally and with full knowledge
of what you were doing, and it's insulting to imply otherwise.

You posted previously that you wrote a new language because you were
writing what you wanted every other language to be. This is very
similar to why Guido wrote Python and I wish you the best of luck. He
was fortunate enough that the language he wanted also happened to be
the language that lots of other people wanted. You don't seem to be so
fortunate, and anti-social behavior on newsgroups dedicated to other
languages is unlikely to change that. You're not the first and you
won't be the last.


From benjamin.fremiot at gmail.com  Mon May 12 07:09:45 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 04:09:45 -0700 (PDT)
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
Message-ID: <bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>

On May 12, 12:31?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.frem... at gmail.com> escribi?:
>
> > I'm currently working on python embedding with C++. My goal is that
> > the C++ part handle files writing/reading so that the Python part only
> > works with buffers.
>
> > I succeeded in buffer exchanges. The problem is that some of the files
> > I read/write are python files so that, before embedding, I imported
> > them as modules when I needed them.
>
> > But now that the Python part only receive buffers, I can't do it
> > anymore. So I wonder :
> > - is it possible to import module from a buffer instead of files?
> > - or is it possible to create a module object from my buffer?
>
> Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c
>
> --
> Gabriel Genellina

Thanks for your quick answer !
I think I'll have no problem with that in C++ and I'm going to try it
right after this message.

But before that 1 question: what if I'm in Python ?
Following your solution, I did that in Python :

    def load_buffer(buffer) :
        compiled_buffer = compile(buffer, "module_name", "exec")
        exec(compiled_buffer)

It works great except that I can't have a module object and that it is
as if I did "from module import *"
But I need the module object and not an "import *" behavior.
Any idea about the way to do that?

Benjamin


From bignose+hates-spam at benfinney.id.au  Fri May  2 09:30:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 23:30:01 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
Message-ID: <87k5iczvdy.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 13:24:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > I much prefer "#! /usr/bin/python" because I want my Python
> > programs to, by default, be run with the default Python, and
> > depend on Python being installed by the operating system's package
> > manager. On systems that use shebang lines and that actually have
> > standardised filesystem locations, the default Python is found at
> > '/usr/bin/python'.
> 
> You have lived a sheltered life.  Not every packaging system puts the
> executible in /usr/bin.  Many systems use /usr/local/bin.

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 15:50:22 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > They use that for the operating-system-installed default Python
> > interpreter? Colour me incredulous.
> 
> OK, let me get out my crayons.  However, note that I did not say
> "operating-system-installed."

That is, however, the context I've been explicitly using since this
sub-thread began.

The OP was asking why people prefer on over the other. My answer is
that I prefer specifying "give me the default OS Python" because
anything not installed by the OS is to non-standardised for me to
worry about.

Others may prefer something different, but then they get to wear
whatever problems occur as a result of that choice. I continue to be
bemused by that preference, and nothing that I've seen so far in this
thread illuminates the issue more.

-- 
 \     "Nothing so needs reforming as other people's habits."  -- Mark |
  `\                                       Twain, _Pudd'n'head Wilson_ |
_o__)                                                                  |
Ben Finney


From arnodel at googlemail.com  Sun May 11 14:26:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 19:26:29 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
Message-ID: <m2abiw4rze.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

> On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:
>
>> bc90021 <python at bc90021.net> writes:
>> 
>>> Hi All,
>>>
>>> Thanks in advance for any and all help!
>>>
>>> I have this code:
>>>
>>> g = open(fileName, 'a')
>>>
>>> where fileName is defined before the line it's used in.  It works fine
>>> when I use it outside a thread class.
>>>
>>> When I put the same line in a thread class, it no longer works, and I
>>> get an error:
>>>
>>> IOError: [Errno 2] no such file u'fileName'
>>>
>>>
>> It's telling you that you haven't got a file called 'fileName'. Posting
>> the code that triggers this error would allow people to diagnose the
>> error accurately rather than guessing.
>
> f = open(otherFile).readlines()
> for i in len(f):
> 	for c in range(0,24,1):
> 		if os.name == "posix":
> 			tempfileName = "\"proctemp/" + self.matrix[c][0] 
> + "_tmp_" + fileName + ".txt\""
>    	if re.search(f[i], pattern):
> 		g = open(tempfileName, 'a')
> 		g.write(f[i])
>
>
> This code works *perfectly* unless I put it in a class that inherits from 
> threading.Thread.  In the thread class, everything works (I can see the 
> "c" value, and I can print out each line in "f[i]", it's just that the g 
> = open line doesn't work.

It's difficult to know what's wrong with the code you posted because:

* it is not self-contained: otherFile, fileName, pattern are names
  which you do not define;

* the IOError you reported earlier can't arise as a result of running
  this code.

* you claim it works unless you put it in a subclass of
  threading.Thread.  Why don't you post this instead, and show us the
  traceback?

HTH

FWIW, my crystal ball (whose predictions I don't usually report!)
tells me the same as Garry Herron's.

-- 
Arnaud


From duncan.booth at invalid.invalid  Fri May  9 04:00:17 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 08:00:17 GMT
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <Xns9A995B8F535E6duncanbooth@127.0.0.1>

andrej.panjkov at climatechange.qld.gov.au wrote:

> Indeed, there are many ways this could be done.  Some are more
> concise, some are more efficient.  As I said, I did it the way I did
> it to try out lambdas.  Your way achieves the result, rather elegantly
> I think, but teaches me nothing about using lambdas.

Unfortunately what you wrote taught you nothing about using lambda either. 
I think you were looking for it to have mystic powers, when in fact all it 
gives you is an alternative way to define a function.

> 
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.

It was blunt because your post was so wide of the mark, yet it was well 
written and at least at first glance sounded plausible. Other people had 
even followed up on minor points having apparently not spotted the bigger 
problem.

Remember that what you post here is going to be archived by Google and 
instructing (or misleading) people for years to come so jumping hard on 
factual errors is (I think) worthwhile. (And I really appreciate it every 
time other people have jumped on things I've got wrong.)

On the other hand, there are plenty of people who use lambda in situations 
which are more or less appropriate. Just how appropriate they are is 
usually a matter of opinion, and while I may express my opinion when I 
think they are misusing them, that's all it is: an opinion. Everyone is 
free to disagree (and generally does).


From j.spies at hccnet.nl  Sun May 18 16:29:37 2008
From: j.spies at hccnet.nl (Jaap Spies)
Date: Sun, 18 May 2008 22:29:37 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
> 
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C, but I like Python more.
> 
> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
> 
> * I don't know how likely it is to find libraries in Python related to
> my research field.
> 
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
> 

You definitely should take a look at Sage: http://www.sagemath.org/

This may offer all you need, based on Python integrating a lot of
other programs!

Jaap


From castironpi at gmail.com  Wed May 14 19:18:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:18:00 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com> 
	<873aokzgs9.fsf@benfinney.id.au>
	<aea52155-79d1-43ba-be28-add2c81e362c@a1g2000hsb.googlegroups.com>
Message-ID: <a76727e0-eaae-4894-b6f6-cbbf937afe7b@k37g2000hsf.googlegroups.com>

On May 14, 5:28?pm, castiro... at gmail.com wrote:
> On May 14, 5:01?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > > On 14 mai, 18:20, castiro... at gmail.com wrote:
> > > > I'm concerned over the future of Python. ?Should tuples be named?
>
> > > Obviously not, unless they should.
>
> > Clearly they should, unless not.
>
> > Ben Finney
>
> I have plenty of uses for them!

FOR INSTANCE!

def zoop_zoop_zoop( self ): pass


From wizzardx at gmail.com  Thu May  8 09:14:19 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 15:14:19 +0200
Subject: Parsing Email 'References' header.
In-Reply-To: <4822F7B6.2000403@gmail.com>
References: <4822F7B6.2000403@gmail.com>
Message-ID: <18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>

On Thu, May 8, 2008 at 2:53 PM, Aspersieman <aspersieman at gmail.com> wrote:
> Hi
>
>  I have a python script that parses email headers to extract information
> from them. I need to get the _last_ messageid in the 'References' field
> (http://cr.yp.to/immhf/thread.html) to create a threaded view of these
> emails (these messageid's are stored in a database).
>
>  Now, I can easily access the 'References' field using the python 'email'
> module, but I need a regular expression to get the last messageid in the
> 'References' field.
>
>  Here's what I have so far:
>  <code>
>  rx_lastmesgid = re.compile(r"(<.+>$)")
>  lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) #
> parentid's value is
> eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
>  lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
>  </code>
>
>  I need it to return "<5 at mail.gmail.com>"
>
>  Can anyone help?
>

"<.*>(<.*?>)"


From inhahe at gmail.com  Fri May 30 03:09:43 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 30 May 2008 03:09:43 -0400
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <vJN%j.61538$7a.29246@bignews1.bellsouth.net>


"Gandalf" <goldnery at gmail.com> wrote in message 
news:13801bd3-50da-4773-a0aa-edcaf27e0c4d at 34g2000hsf.googlegroups.com...
> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
>
> mmm isn't their any global variable for functions?

how about
def aaaa():
  y = x+1
  if y > 1:
    return "wrong"
  else:
    return y

but if you really have to modify x outside of the scope of the function, 
well, i guess one possibility is to return a tuple, one element being a 
string that may or may not contain the word "wrong" and another being x, and 
then whatever's calling aaaa can change x in their own scope based on the 
return value. but other than that, the normal way to affect a variable 
beyond the scope of your function is to make a class and affect a class 
variable.  although there is always the 'global' statement also.





From malaclypse2 at gmail.com  Tue May 13 16:21:37 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Tue, 13 May 2008 16:21:37 -0400
Subject: built in list generator?
In-Reply-To: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
Message-ID: <16651e80805131321w6d7338cem36ff3d707d2b49f@mail.gmail.com>

On Tue, May 13, 2008 at 4:05 PM, globalrev <skanemupp at yahoo.se> wrote:
> if i want  a list with all numbers between x and y is there a way to
>  do this with an inbult function.
>
>  i mean i can always construct a function to do this but is there
>  soemthing like:
>
>  nbrs = list(range(50,100, 2))

What's wrong with just using range()?

>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 10)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 11)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> range(1, 11, 2)
[1, 3, 5, 7, 9]
>>>

-- 
Jerry


From enleverlesX.XmcX at XmclaveauX.com  Wed May  7 15:10:18 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 7 May 2008 21:10:18 +0200
Subject: Idea for P3K
In-Reply-To: <m2k5i6561z.fsf@googlemail.com>
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
Message-ID: <4821fea4$0$880$ba4acef3@news.orange.fr>

Hi!

> I don't often feel like using this word

Look at languages like OCAML or F #

@-salutations
-- 
Michel Claveau



From python at rcn.com  Wed May 14 13:41:26 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 14 May 2008 10:41:26 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
Message-ID: <a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>

>?Should tuples be named?

Yes.



From shahmed at sfwmd.gov  Fri May  9 09:54:16 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Fri, 9 May 2008 09:54:16 -0400
Subject: Pythonwin
In-Reply-To: <8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com><11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20AF825CE@EXCHVS01.ad.sfwmd.gov>

You need to install the same version on your pc, if you have 2.5 already installed you need to download 2.5 pythonwin from http://sourceforge.net

Hope it will work for you.
Thanks
sk


-----Original Message-----
From: python-list-bounces+shahmed=sfwmd.gov at python.org [mailto:python-list-bounces+shahmed=sfwmd.gov at python.org] On Behalf Of Clive_S
Sent: Friday, May 09, 2008 9:41 AM
To: python-list at python.org
Subject: Re: Pythonwin

Hi all

I downloaded (from Python) and installed python-2.4.4.msi

I have python and pythonw.exe in the Python 24 folder (but not in my
start menu).
When I click on the pythonw.exe it is not launched??

Thanks

Clive


On 9 May, 14:09, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
>
> > Hi
> > I am trying to use Python with ArcGIS.
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> > How do you install or launch pythonwin??
> > Thanks
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike

--
http://mail.python.org/mailman/listinfo/python-list



From bignose+hates-spam at benfinney.id.au  Fri May 23 23:48:41 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 13:48:41 +1000
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
Message-ID: <878wy0cqg6.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> when running a very computationalheavy program in the shell it
> sometimes freezes but the commandprompt runs it without problems

Can you tell us exactly which programs you mean when you say "the
shell" and "the commandprompt"?

-- 
 \      "One seldom discovers a true believer that is worth knowing."  |
  `\                                               -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From noah at noah.org  Sun May  4 20:22:59 2008
From: noah at noah.org (Noah)
Date: Sun, 4 May 2008 17:22:59 -0700 (PDT)
Subject: Where are Tkinter event.type constants defined?
Message-ID: <4a428d7d-1ec9-4383-a543-98bd725cfbb1@d19g2000prm.googlegroups.com>

I'm trying to match against Event.type for KeyPress and ButtonPress.
Currently I'm using integer constants (2 and 4). Are these constants
defined anywhere? The docs talk about KeyPress and ButtonPress, but I
don't see them in any of the Tkinter source files. Are these just
magic values that come out of the TK side of things and are not
defined in Python? Code like this makes me think I'm doing something
wrong:

    if event.type == 2:
        handle_key_press (event.char)
    elif event.type == 4:
        do_something_for_button ()
    else:
        pass # unknown event

(I understand that usually you would bind these function so that they
are called as a callback.)

I don't mind defining the constants myself. I just want to make sure
that I'm not missing something already done for me. Does anyone happen
to have a complete list of Event.type constants?

--
Noah


From fetchinson at googlemail.com  Tue May 13 18:34:03 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Tue, 13 May 2008 15:34:03 -0700
Subject: What is self.file = file for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <fbe2e2100805131534o5d84971cy66535dd03a42c0f7@mail.gmail.com>

> I have trouble understanding something in this code snippet:
>
> class TextReader:
>     """Print and number lines in a text file."""
>     def __init__(self, file):
>         self.file = file
>         .
>         .
>         .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.

This is a standard object oriented programming idiom. You might find
it useful to ask around on the 'tutor' mailing list of python --
http://mail.python.org/mailman/listinfo/tutor -- where you'll get
detailed explanations on basic OOP and python topics.

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From tjreedy at udel.edu  Fri May 16 20:13:42 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 20:13:42 -0400
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org><8763tea9sd.fsf@mulj.homelinux.net>
	<cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>
Message-ID: <g0l7vm$gjo$1@ger.gmane.org>


"????" <littlesweetmelon at gmail.com> wrote in message 
news:cdb837ea0805160309g6ea51644nf2337bcddc34eb21 at mail.gmail.com...
| > # an efficient 'Pair' class holding two objects
| > class Pair(object):
| >    __slots__ = 'first', 'second'
| >
| > Instances of Pair take up even less room that 2-element tuples
| > because they don't carry the size information in the object.
| >
| > Now, if the object class carried a dict with it, it would be
| > impossible to create a class like 'Pair'.
| >
| Really interesting. When the tuple ('first', 'second') is assigning to
| __slot__, a special operation is done which makes __slot__ pointing
| to a magic structure rather than a normal tuple. Am I right?

Try it.  Run the code and print P.__slots__.
<pause>

Class statements are implemented by calling the metaclass 'type' with 3 
args.  Type.__new__ uses the information in those args.  If the namespace 
arg has a __slots__ member, it does something special based on the strings 
in the tuple, but it leaves the tuple alone. 





From jschroed at gmail.com  Thu May  8 21:12:46 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 18:12:46 -0700
Subject: How can I add spaces where ever I have capital letters?
Message-ID: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>

I have a string (which I got from the names of my classes) and I would like
to print out my CamelCase classes as titles.

I would like it to do this:

>>> my_class_name = "ModeCommand"
## Do some magic here
>>> my_class_name
'Mode Command'

Anyone know any easy way to do this?  Thanks.
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From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 06:43:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 12:43:15 +0200
Subject: named tuple mutability
In-Reply-To: <87zlqrx4rj.fsf@benfinney.id.au>
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
	<482be615$0$10798$426a34cc@news.free.fr>
	<87zlqrx4rj.fsf@benfinney.id.au>
Message-ID: <482c13b7$0$6345$426a74cc@news.free.fr>

Ben Finney a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
> 
>> May we agree to disagree here - unless we don't ?
> 
> Absolutely not, except where not applicable.
> 

and vice versa.


From sturlamolden at yahoo.no  Thu May 22 19:05:28 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 22 May 2008 16:05:28 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <191135ea-c116-4c40-8f9d-72b6e7c8d2fc@s50g2000hsb.googlegroups.com>

On May 22, 6:14 pm, cm_gui <cmg... at gmail.com> wrote:

> I've yet to see a web application written in Python which is really
> fast.

I bet you have a slow dial-up connection.




From castironpi at gmail.com  Tue May 20 09:28:51 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:28:51 -0700 (PDT)
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
Message-ID: <37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>

On May 20, 8:19?am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> #!/usr/bin/python
>
> #why doesn't this run both threads simultaneously?
> #Thanks for any help.
> #Chuckk
>
> import threading
> import time
>
> def printesc(thrd):
> ? ? for i in range(10):
> ? ? ? ? time.sleep(1)
> ? ? ? ? print thrd, i
>
> def master():
> ? ? thd1 = threading.Thread(target=printesc, args=(1,))
> ? ? thd2 = threading.Thread(target=printesc, args=(2,))
> ? ? thd1.run()
> ? ? thd2.run()
>
> master()

You meant 'thd1.start( )' and 'thd2.start( )'.


From castironpi at gmail.com  Tue May 13 11:41:26 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:41:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<7803a03b-c626-4573-b859-6611229cb622@a70g2000hsh.googlegroups.com>
Message-ID: <1925c560-13fe-4b40-80e6-8ef036562547@56g2000hsm.googlegroups.com>

On May 13, 10:35?am, castiro... at gmail.com wrote:
> On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
> wrote:
>
>
>
>
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.
>
> > Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > (and even less per individual for site licenses), which is less than
> > the cost of just one book on Python.
>
> > I think that many people will find that Flaming Thunder is easier to
> > use and understand than Python -- so for many people the amount of
> > time they save will be worth more than the cost of Flaming Thunder
> > (unless, of course, their time is worth $0).
>
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> > But the future is one of the hardest things to predict, so we'll see.
>
> > On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > > Don't let yourself be irritated by castironpi
>
> > > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > > interaction.
>
> > > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > here. ?If you go back to his postings from a year ago (and selected
> > > > ones since), his comments are coherent and sensible. ?These rambling
> > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > his idea of a joke. ?But they are certainly not worth your time in
> > > > trying to respond to them.
>
> > > > -- Paul
>
> > > ?I don't think castironpi so annoying that I should filter its
> > > messages. It would be enough if he were better tuned. He is much
> > > smarter than the emacs shrink, for example. :-P
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -
>
> Flaming Thunder, the lightning one, looked like [ 255, 210, 255 ], but
> the next thing I thought was -40 on green.- Hide quoted text -
>
> - Show quoted text -

Now get this:  I am talking to someone.  #define someone now.


From upton at virginia.edu  Tue May 13 14:08:25 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 14:08:25 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>
Message-ID: <5504f9ac0805131108qeb27176rf6c80a00b1e34570@mail.gmail.com>

On Tue, May 13, 2008 at 1:58 PM, Matthieu Brucher
<matthieu.brucher at gmail.com> wrote:
>
> > Perhaps.  But if elementary school students can easily understand why
> > one programming language gives the answer 100 (Flaming Thunder):
> >
> >  Write 10^2.
> >
> > but can't understand why another programming language gives the answer
> > 8 (Python):
> >
> >  Print 10^2
> >
> > then I think the comparison moves beyond a matter of taste into the
> > realm of measurable ease-of-use.
> >
>
> Well...
>
> >>> 10**2
> 100
>
> Why ^ ? There is no good reason why use ^ over ** and vice versa, so what
> you try to prove is not with your example.
>

Actually, I'm a fan of ^ over ** for exponentiation, because it's a
good visual cue for "raising."  (What if in LaTeX you had to write
$x**{y}$? :p)   Meanwhile, I don't see what ^ has to do with the
regular XOR symbol.

On the other hand, I don't really go for arguments that language x is
better than language y because there are fewer things you have to tell
new students to just accept as something you have to do.  (ie, sure,
teach Python over C or Java because it will take them less /time/ to
write hello world, but don't say "python is better because you don't
have to tell the students 'just accept you have to #include <stdio.h>,
and you have to int main(), and you have to printf instead of print")


From tjreedy at udel.edu  Thu May  8 16:42:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 16:42:10 -0400
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
	<ad2861dc-d9fd-4ad4-aa3d-1e401e581cab@b9g2000prh.googlegroups.com>
Message-ID: <fvvoiv$vvb$1@ger.gmane.org>


"Miki" <miki.tebeka at gmail.com> wrote in message 
news:ad2861dc-d9fd-4ad4-aa3d-1e401e581cab at b9g2000prh.googlegroups.com...
Hello,

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
> # How do I do the following line?
> if key not in second_dict or if it is, but has has the wrong value,
> then let me know

Does this work for you?

for key,value in second_dict.iteritems():
  try:
    if first_dict[key(1)] == value:
        return True
    else:
        return False:
  except KeyError:
        return False

tjr 





From ivan.illarionov at gmail.com  Tue May 20 05:18:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 09:18:32 +0000 (UTC)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org>
	<g0m9or$2qk0$1@news.mtu.ru>
	<10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>
Message-ID: <g0u518$1fec$4@news.mtu.ru>

On Mon, 19 May 2008 13:53:31 -0700, bruno.desthuilliers at gmail.com wrote:

> On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:
>> > En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
>> > <ivan.illario... at gmail.com> escribi?:
>>
>> >> After re-reading "Python is not Java" I finally came to conclusion
>> >> that classmethods in Python are a very Bad Thing.
>>
>> >> I can't see any use-case of them that couldn't be re-written more
>> >> clearly with methods of metaclass or plain functions.
>>
>> > A good use case for class methods are alternate constructors, like
>> > dict.from_keys. I don't think an alternate constructor would be more
>> > clear being a method of the metaclass - actually it belongs to the
>> > class itself, not to its metaclass.
>> > Metaclass methods are harder to find; they don't show in
>> > dir(instance) nor dir(class).
>> > Also the resolution order is harder to grasp for metaclasses - but
>> > this may be just lack of usage from my part...
>>
>> >> They have the following issues:
>> >> 1. You mix instance-level and class-level functionality in one place
>> >> making your code a mess.
>>
>> > Not necesarily; some classmethods are naturally tied to the class
>> > itself, not to the metaclass (like the constructor example above).
>> > But yes, *some* classmethods could be written as methods of their
>> > metaclass instead - but that doesn't always make sense.
>>
>> >> 2. They are slower than metaclass methods or plain functions.
>>
>> > Hu? How did you come to that?
>> > I've done a small test and a class method wins by a very minuscule
>> > but consistent advantage over a metaclass method:
>>
>> > class A(object):
>> >      color = "red"
>>
>> >      @classmethod
>> >      def foo(cls, x):
>> >          return getattr(cls, x)
>>
>> > class MetaB(type):
>> >      def foo(self, x):
>> >          return getattr(self, x)
>>
>> > class B(object):
>> >      __metaclass__ = MetaB
>> >      color = "red"
>>
>> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
>> > "A.foo('color')"
>> > 1000000 loops, best of 3: 1.19 usec per loop
>>
>> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
>> > "B.foo('color')"
>> > 1000000 loops, best of 3: 1.2 usec per loop
>>
>> How did I come to this:http://code.djangoproject.com/changeset/7098
>>
>> I measured this and there was a marginal speed increase when
>> classmethods wher moved to metaclass.
> 
> IIRC (please correct me if I'm wrong), this part of code is only called
> when the class is created - in which case it makes sense to move it
> where it belongs, ie to the metaclass. This is by no mean a use case for
> classmethods.

Yes, this is not the use case for class methods, but they where used 
there. The whole point of my post was to say that classmethods are used 
in a wrong way too often and most of Python programmers don't know that 
the same thing can be implemented with metaclass methods.

-- Ivan


From darkwind.87 at gmail.com  Thu May  8 20:30:31 2008
From: darkwind.87 at gmail.com (Dark Wind)
Date: Thu, 8 May 2008 17:30:31 -0700
Subject: Free Memory
Message-ID: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>

Hi,

How can I free all the memory in python by deleting all variables. I am
looking for the equivalent of 'clear' from Matlab.

I know del x deletes a variable x, but it doesn't free all the available
memory.

Thank you
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From luckyluke56 at gmail.com  Sat May 24 09:41:06 2008
From: luckyluke56 at gmail.com (Sh4wn)
Date: Sat, 24 May 2008 06:41:06 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
Message-ID: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>

Hi,

first, python is one of my fav languages, and i'll definitely keep
developing with it. But, there's 1 one thing what I -really- miss:
data hiding. I know member vars are private when you prefix them with
2 underscores, but I hate prefixing my vars, I'd rather add a keyword
before it.

Python advertises himself as a full OOP language, but why does it miss
one of the basic principles of OOP? Will it ever be added to python?

Thanks in advance,
Lucas


From markguildwars1 at hotmail.com  Thu May  8 07:54:58 2008
From: markguildwars1 at hotmail.com (Mark Jordaan)
Date: Thu, 8 May 2008 13:54:58 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>


pls dont learn it
 
Move on
 
The world is full enough of 9 to 5 coders
 
Mark> From: raxitsheth2000 at gmail.com> Subject: Newbie to python --- why should i learn !> Date: Thu, 8 May 2008 03:25:17 -0700> To: python-list at python.org> > Hi,> > i was reading/learning some hello world program in python.> I think its very simillar to Java/C++/C#. What's different (except> syntax) ?> > what can i do easily with python which is not easy in c++/java !?> > Tnx,> Raxit> www.mykavita.com> --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Tired of having no room left in your inbox? Windows Live Hotmail now gives you 5GB of FREE storage! Get your free Windows Live Hotmail account here!
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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 08:27:27 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 14:27:27 +0200
Subject: Python is slow
In-Reply-To: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
Message-ID: <4836b81b$0$24012$426a34cc@news.free.fr>

Carl Banks a ?crit :
(snip technically pedantic correction)
> You know, even though you're technically correct, I'd like to see you
> abandon this little crusade.  At this point it's more noisy than
> helpful.
(snip)

Mmm... You're probably right. I tend to be way too pedantic sometimes. 
OTHO, there are people not even having the slightest clue here - I once 
was - and being corrected on similar things usually helped me. But yes, 
I'll try to refrain myself...


From catphive at catphive.net  Fri May  2 01:27:01 2008
From: catphive at catphive.net (Brendan Miller)
Date: Thu, 1 May 2008 22:27:01 -0700
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
	<8763tx1j5o.fsf@benfinney.id.au>
Message-ID: <ml9u5tx2w10i.ym9gmtkot622$.dlg@40tude.net>

On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:

> URL:http://docs.python.org/lib/module-subprocess.html

Awesome. This is exactly what I was hoping existed.


From duncan.booth at invalid.invalid  Mon May 12 08:04:41 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 12:04:41 GMT
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
Message-ID: <Xns9A9C83F62CA39duncanbooth@127.0.0.1>

Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

>>> is there a better way than my solution? is mine ok?
>> 
>> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>>  or str(i) for i in xrange(1, 101)]
>> 
>> -- Ivan
> 
> or, more correctly, if you actually need to "print":
> 
> sys.stdout.write('\n'.join('%s%s' % 
>     (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
>     or str(i) 
>     for i in xrange(1, 101)))

I think the variant I came up with is a bit clearer:

for i in range(1,101):
	print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i


From michele.simionato at gmail.com  Fri May 23 03:40:19 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 23 May 2008 00:40:19 -0700 (PDT)
Subject: pickle error: can't pickle instancemethod objects
Message-ID: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>

Can somebody explain what's happening with the following script?

$ echo example.py
import pickle

class Example(object):

    def __init__(self, obj, registry):
        self._obj = obj
        self._registry = registry
        for name, func in self._registry.iteritems():
            setattr(self, name, func.__get__(obj, obj.__class__))

    def __gestate__(self): # should skip the bound methods attributes
        return dict(_registry=self._registry, _obj=self._obj)

class C(object):
    pass

def foo(self):
    pass

if __name__ == '__main__':
    ex = Example(C(), dict(foo=foo))
    pickle.dumps(ex)

I get the following traceback:

Traceback (most recent call last):
  File "pickle_error.py", line 22, in <module>
    pickle.dumps(ex)
  File "/usr/lib/python2.5/pickle.py", line 1366, in dumps
    Pickler(file, protocol).dump(obj)
  File "/usr/lib/python2.5/pickle.py", line 224, in dump
    self.save(obj)
  File "/usr/lib/python2.5/pickle.py", line 331, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/python2.5/pickle.py", line 419, in save_reduce
    save(state)
  File "/usr/lib/python2.5/pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.5/pickle.py", line 649, in save_dict
    self._batch_setitems(obj.iteritems())
  File "/usr/lib/python2.5/pickle.py", line 663, in _batch_setitems
    save(v)
  File "/usr/lib/python2.5/pickle.py", line 306, in save
    rv = reduce(self.proto)
  File "/usr/lib/python2.5/copy_reg.py", line 69, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle instancemethod objects

I know that instancemethods cannot be pickled, this is why I
used a __getstate__ method, but apparently it does not work.
Any hint?

           Michele Simionato


From arnodel at googlemail.com  Thu May 22 14:18:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 22 May 2008 19:18:13 +0100
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <m2d4ne6w4a.fsf@googlemail.com>

cm_gui <cmgui2 at gmail.com> writes:

> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

You're slow too. And your mum.  And your car is so slow, it gets
overtaken by slugs.  Whereas I'm really fast, I'll race you to the end
of the street and we'll see who wins.  My mum's fast, my car's got a
super fast noisy exhaust.

So there.

-- 
Arnaud


From max at alcyone.com  Sat May  3 17:20:37 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:20:37 -0700
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <481CB283.107@gmail.com>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>

Szabolcs Horv?t wrote:

> Arnaud Delobelle wrote:
>>
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
> 
> This occurred to me also, but then I tried
> 
> sum(['abc', 'efg'], '')
> 
> and it did not work.  Or is this just a special exception to prevent the 
>  misuse of sum to join strings?  (As I said, I'm only an occasional user.)

What you wrote is nonsensical there, no different from 'a' + 1 -- which 
is why it quite rightly raises a TypeError.

You're trying to add a list to a string, which is nonsensical.  You add 
strings to strings, or lists to lists, but mixing them up doesn't make 
sense.  Python can't guess what you mean when you write something like 
['abc', 'def'] + '' -- which is the functional equivalent of your call 
to sum -- and so doesn't try.  It indicates this by raising a TypeError.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From clabepa at gmail.com  Thu May 15 12:51:55 2008
From: clabepa at gmail.com (Claudio Driussi)
Date: Thu, 15 May 2008 18:51:55 +0200
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482c6a27$0$22075$6e1ede2f@read.cnntp.org>

Johny ha scritto:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

If your target is Windows, you can try mediator components

http://www.otc.pl/download/

which are COM objects based on xHarbour and which give you
full access to DBF and index.

You need PythonWin too.

I did some tests, if you like i can send you something,
call me in my private mail.

Claudio


From rileyrgdev at gmail.com  Wed May 21 10:27:08 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Wed, 21 May 2008 16:27:08 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<g11128$n1n$2@registered.motzarella.org>
	<48342ff3$0$20826$426a34cc@news.free.fr>
Message-ID: <g11bft$7b4$3@registered.motzarella.org>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Richard G Riley a ?crit :
>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
>
> (snip)
>
>>> And not that useful - why would one care about the function being
>>> defined in class X or Y when one have the exact file and line ?
>>
>> Very obvious I would think. One can develop ones own interactive class
>> browser and code navigator.
>
> From the traceback ?
>
>>  One can not bring up class help from "line 3
>> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
>> the class name I can navigate directly to all sorts of class related
>> information without the need to delve into a physical usage of it e.g
>> program.py at line 3.
>
> Please bear with me, but I'm afraid I still don't get the point : I
> don't need tracebacks to get to some object's info (help etc).

This is a view quite common to people when they are happy with what they
have. Some like to improve what they have. It is immediately apparent to
me why having a class name and method name in the traceback would be
immediately useful. Having written a few extensions to IDEs in the past
I know it would help me, and I suspect, the original poster. As a recent
"recruit" to Python I am quite surprised as how poor most of the query
like tools in the python shell are. The first thing I did was to move to
iPython. Still, horses for courses.




From pupeno at pupeno.com  Sat May 17 04:37:49 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Sat, 17 May 2008 01:37:49 -0700 (PDT)
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<mailman.1265.1210987210.12834.python-list@python.org>
Message-ID: <6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>

On May 17, 2:19?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pup... at pupeno.com> ?
> escribi?:
>
>
>
> > Hello,
>
> > I have an XML file that starts with:
>
> > <vortaro>
> > <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> > <kap>
> > ? <ofc>*</ofc>-<rad>a</rad>
> > </kap>
>
> > out of it, I'd like to extract something like (I'm just showing one
> > structure, any structure as long as all data is there is fine):
>
> > [("ofc", "*"), "-", ("rad", "a")]
>
> > How can I do it? I managed to get the content of boths tags and the
> > text up to the first tag ("\n ? "), but not the - (and in other XML
> > files, there's more text outside the elements).
>
> Look for the "tail" attribute.

That gives me the last part, but not the one in the middle:

In : etree.tounicode(e)
Out: u'<kap>\n  <ofc>*</ofc>-<rad>a</rad>\n</kap>\n'

In : e.text
Out: '\n  '

In : e.tail
Out: '\n'

Thanks.


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:53:34 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:53:34 -0300
Subject: POP connection timeout.
References: <4822F105.5050505@gmail.com>
Message-ID: <op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:24:37 -0300, Aspersieman <aspersieman at gmail.com> escribi?:

> I have written an application that queries a POP mailbox and
> downloads messages. When the application tries to connect to the mail
> server, but takes too long (eg. longer than 60 seconds) I want to have
> it time out.
>
> Something like
>
> try:
>    pop = poplib.POP3(POPHOST, POPPORT)
> except someerror, err:
>    print "Connecting to mail box has timed out:\n", err
>
> I know that in python 2.5 I could pass an additional timeout parameter
> to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT,
> TIMEOUTINSECONDS), but I am using python 2.4.

Use socket.setdefaulttimeout(timeout_in_seconds) before you create the POP3 object; this value will be used by the initial connect. Once it is connected, you can set a different timeout for retrieving mail using pop.sock.settimeout(...)
Note that setdefaulttimeout applies to ALL subsequent socket operations, not only using poplib.
<http://docs.python.org/lib/socket-objects.html>

-- 
Gabriel Genellina



From grante at visi.com  Fri May  2 11:27:14 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 10:27:14 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
Message-ID: <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>

On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> On Sat, 03 May 2008 00:44:00 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
>> > As someone else pointed out, not all the world is Linux.
>> 
>> It's a good thing I've never implied such to be the case.
>
> You haven't *said* it but you have definitely *implied* it.
> Installing Python in /usr/bin is not common.

It is common.  That's where it's installed by almost all Linux
distributions.

> It is very specific to your system.

Are you claiming that Linux is not a "common" Unix-like OS?

-- 
Grant



From rhamph at gmail.com  Thu May 29 13:25:06 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Thu, 29 May 2008 10:25:06 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <fddf912f-e672-4a55-bbae-c2d4c0aebaf7@t12g2000prg.googlegroups.com>

On May 28, 1:14 pm, rsoh.woodho... at googlemail.com wrote:
> Hi,
>
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
>
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
>
> import threading
> class TestThread(threading.Thread):
>
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
>
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
>
> # end of sample script
>
> Now if I run this using:
>
> $ python ThreadTest.py
>
> then it behaves as expected, ie an output like:
>
> start
> finish
> 0
> 1
> 2
> ...
>
> But if I run it as follows (how the inherited code was started):
>
> $ python -c "import TestThread"
>
> then I just get:
>
> start
>
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

For reasons I haven't figured out, child threads always acquire the
import lock.  Since the main thread is already in an import, and is
waiting for the child thread to finish, this deadlocks.

"python ThreadTest.py" doesn't deadlock because ThreadTest isn't
loaded as a module - it's loaded as a script.  A script doesn't hold
the import lock while it executes.

The solution is to move all the thread spawning and whatnot into a
main() function, use the "if __name__ == '__main__': main()" trick for
when you are a script, and if a module require the caller to do
ThreadTest.main() after importing.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:40:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:40:11 -0300
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua1ek9jpx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 06:45:40 -0300, Michele Simionato <michele.simionato at gmail.com> escribi?:
> On May 12, 4:28?am, Yves Dorfsman <y... at zioup.com> wrote:
>> there's got to be a better way than:
>>
>> d = time.local()
>> y = d[0]
>> d = d[1]
>
> Uses Python 2.6! ;)
>
> Python 2.6a3 (r26a3:62861, May 12 2008, 11:41:56)
> [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import time
>>>> time.localtime()
> time.struct_time(tm_year=2008, tm_mon=5, tm_mday=12, tm_hour=11,
> tm_min=43, tm_sec=47, tm_wday=0, tm_yday=133, tm_isdst=1)
>>>> t=time.localtime()
>>>> t.tm_year, t.tm_mday
> (2008, 12)

No need of 2.6 - the above code works since Python 2.2 at least:

Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> t=time.localtime()
>>> type(t)
<type 'time.struct_time'>
>>> t.tm_year
2008

(but struct_time objects were printed as regular tuples)

-- 
Gabriel Genellina



From squareswallower at 1ya2hoo3.net  Sat May 17 00:52:59 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Fri, 16 May 2008 22:52:59 -0600
Subject: Markov Analysis Help
Message-ID: <g0lobb$1lu$1@news.xmission.com>

Hi Guys,

I've written a Markov analysis program and would like to get your 
comments on the code  As it stands now the final input comes out as a 
tuple, then list, then tuple.  Something like ('the', 'water') ['us'] 
('we', 'took')..etc...

I'm still learning so I don't know any advanced techniques or methods 
that may have made this easier.


here's the code:

def makelist(f): 	#turn a document into a list
	fin = open(f)
	results = []
	for line in fin:
                line = line.replace('"', '')
		line = line.strip().split()
		for word in line:
			results.append(word)
	return results



def markov(f, preflen=2):	#f is the file to analyze, preflen is prefix length
	convert_file = makelist(f)
	mapdict = {}		#dict where the prefixes will map to suffixes
	start = 0
	end = preflen 		#start/end set the slice size
	for words in convert_file:
		prefix = tuple(convert_file[start:end])     #tuple as mapdict key
		suffix = convert_file[start + 2 : end + 1]  #word as suffix to key
		mapdict[prefix] = mapdict.get(prefix, []) + suffix #append suffixes
		start += 1
		end += 1
	return mapdict



def randsent(f, amt=10):     #prints a random sentence
        analyze = markov(f)
	for i in range(amt):
		rkey = random.choice(analyze.keys())
		print rkey, analyze[rkey],


The book gave a hint  saying to make the prefixes in the dict using:

def shift(prefix, word):
	return prefix[1:] + (word, )

However I can't seem to wrap my head around incorporating that into the 
code above, if you know a method or could point me in the right 
direction (or think that I don't need to use it) please let me know.

Thanks for all your help,

Dave



From zzvladimir at gmail.com  Sun May  4 08:48:03 2008
From: zzvladimir at gmail.com (Vladimir Kropylev)
Date: Sun, 4 May 2008 16:48:03 +0400
Subject: please remove me from this list
Message-ID: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>

please remove me from this list, thanks


From zapwireDASHgroups at yahoo.com  Fri May 23 18:44:27 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Fri, 23 May 2008 15:44:27 -0700
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
	<4837225e$0$5507$9b622d9e@news.freenet.de>
Message-ID: <jNHZj.147601$Tj3.61085@en-nntp-02.dc1.easynews.com>

""Martin v. L?wis"" <martin at v.loewis.de> wrote in message 
news:4837225e$0$5507$9b622d9e at news.freenet.de...
> Try all three of them, in sequence:

Thanks, will do.

> If you absolutely don't want to import test, write

I can live with the import, I just don't want to have to type out the full 
names all the time.

---Joel




From __peter__ at web.de  Mon May 19 14:11:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 May 2008 20:11:20 +0200
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
Message-ID: <g0sfs7$cnu$00$1@news.t-online.com>

seanacais wrote:

> I'm trying to build an unknown number of repeating gui elements
> dynamically so I need to store the variables in a list of
> dictionaries.  I understand that  Scale "variable" name needs to  be a
> StringVar  but I cannot figure out how to initialize the dictionary.
> 
> I've tried the following code
> 
> ps = PowerSupply()            # Instantiate a Power Supply VM Object
> numOPs = ps.getOnum()      # Find the number of outputs
> OPValues = []                 # Global list to hold one dictionary per output
> 
> for c in range(numOPs):
> OPValues.append({ })
> ps.initOPValues(c, OPValues[c])
> 
> 
> 
> ps.initOPValues is defined as follows:
> 
> def initOPValues(self, OPname, dname):
> 
> OPDefaults = {
> 'Vval'  : 0,
> 'Ival'  : 0,
> 'Otemp' : 0
> }
> 
> dname = dict((d,StringVar()) for d in OPDefaults)
> for d in OPDefaults:
> dname[d].set(OPDefaults[d])
> 
> I get the following error:
> 
> Traceback (most recent call last):
>   File "C:\Code\gui\tkinter.py", line 165, in <module>
>     ps.initOPValues(c, OPValues[c])
>   File "C:\Code\gui\tkinter.py", line 47, i initOPValues
>     dname = dict((d,StringVar()) for d in OPDefaults)
>   File "C:\Code\gui\tkinter.py", line 47, in <genexpr>
>     dname = dict((d,StringVar()) for d in OPDefaults)
>   File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
>     Variable.__init__(self, master, value, name)
>   File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
>     self._tk = master.tk
> AttributeError: 'NoneType' object has no attribute 'tk'
> Exception exceptions.AttributeError: "StringVar instance has no
> attribute '_tk'"
>  in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
> 0x00B7D468>> ignored
> 
> Any help is appreciated!

There's some magic going on behind the scene which means that you have to
create a Tkinter.Tk instance before you can start churning out StringVars:

>>> import Tkinter as tk
>>> v = tk.StringVar()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 257, in __init__
    Variable.__init__(self, master, value, name)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 188, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
>>> root = tk.Tk()
>>> v = tk.StringVar()
>>> v.set(42)
>>> v.get()
'42'

Peter



From jcd at sdf.lonestar.org  Fri May  9 11:42:14 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 11:42:14 -0400
Subject: python newbie: some surprises
In-Reply-To: <7OZUj.125622$rd2.29080@pd7urf3no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
	<mailman.844.1210314193.12834.python-list@python.org>
	<7OZUj.125622$rd2.29080@pd7urf3no>
Message-ID: <1210347734.3332.36.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-09 at 15:08 +0000, Yves Dorfsman wrote:
> Gabriel Genellina wrote:
> 
> >> I see the point of the OP. Couldn't the new-line be used as an 
> >> equivalent of   ':', for example, do you find this difficult to read:
> >>
> >> if a == 3
> >>    do_something()
> >>
> >>
> >> if a == 3: do_something()
> > 
> > Yes, it could be done, there are no technical reasons to always force to 
> > use ":". But AFAIK the main reasons to keep ":" are internal consistency 
> > (an inner block always starts with ":"; incidentally, that's easier to 
> > handle for editors) and legibility (the ":" stands for itself and has a 
> > meaning)
> 
> Legibility ?
> But one could make the same argument for curly brackets, and we seem to be 
> doing fine without them !
> 
> I have become so used to the power of indenting in python that I keep 
> forgetting the colon, and this is getting worse as I do more python, not 
> better. Maybe I'll write myself a "pre-compiler" that add the colons where 
> the compiler needs them :-)
> 
> 
> Yves.
> http://www.SollerS.ca
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Have you considered the following:

if (x == 4 and (y in 
    [len(x) for x in
    foo if x**2 > 23]
    or y < 2) and z.strip().endswith('z') and
    remove_first(w))
    attach_list(q, r)
    reject(x)

A colon on the correct line would help readability quite a bit.

Yeah, I know I made it pretty ugly to begin with, and there are ways to
improve it without the colon, but still, just because it could be
removed doesn't necessarily mean it should.

Cheers,
Cliff



From notbob at nothome.com  Sun May  4 19:45:52 2008
From: notbob at nothome.com (notbob)
Date: Sun, 04 May 2008 23:45:52 GMT
Subject: Are rank noobs tolerated, here?
Message-ID: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>


I'm trying to learn how to program.  I'm using:
  
How to Think Like a Computer Scientist

Learning with Python
2nd Edition

Am I likely to receive any help, here, or is there another irc, forum, etc,
that might better serve a complete amateur such as myself.  Thnx.

nb


From Lie.1296 at gmail.com  Sun May 25 13:22:21 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:22:21 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <55beb99a-e870-4045-831a-a4cef84fe3dc@t12g2000prg.googlegroups.com>

On May 23, 2:50?pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Brad a ?crit :
>
> > cm_gui wrote:
> >> Python is slow.
>
> > It ain't C++, but it ain't a punch card either... somewhere in between.
> > I find it suitable for lots of stuff. I use C++ when performance really
> > matters tho... right tool for the job. Learn a good interpreted language
> > (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.

> 2/ actually, all known Python implementations compile to byte-code.

<flamingmode useofbrain="alotforaflame">
LordHaveMercy(violatingsomeonesTM). Couldn't you understand that a CPU
INTERPRET bytes of instruction, and that means ALL languages is
interpreted in one stages or another, some languages' (implementation)
is translated/compiled into an intermediate language/bytecode like
most Python or C/C++ or Java implementations, some language
implementation interprets the language directly (like Javascript).

The difference between C and Python (in their regular implementation)
is WHO interprets it, most C/C++'s implementation is interpreted
directly by the CPU, all Python's implementation is interpreted by a
VM. Saying a language implementation is interpreted is nonsense as all
languages implementation is interpreted either by a VM or by CPU or an
interpretator, but we do have a semantic agreement that calling a
language interpreted means it is NOT interpreted by the CPU directly,
some minority have their own agreement that a language
(implementation) is interpreted when it is never translated into an
intermediate language/bytecode, you fall into this second group, which
actually uses the wrong terminology but do have some followers. Don't
forget that language is all about what the _consensus_ says, not what
the dictionary says.

Brad doesn't use any terms incorrectly, he stated that Python is
interpreted, which is true, since in all python implementation,
Python's bytecode is interpreted by a VM. He also states that C/C++ is
compiled which is also true as most if not all C++ implementation have
a stage where it is translated into an intermediate language/bytecode.
</flamingmode>


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 10:21:53 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 16:21:53 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <g11128$n1n$2@registered.motzarella.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>	<483406a0$0$10773$426a74cc@news.free.fr>
	<g11128$n1n$2@registered.motzarella.org>
Message-ID: <48342ff3$0$20826$426a34cc@news.free.fr>

Richard G Riley a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

(snip)

>> And not that useful - why would one care about the function being
>> defined in class X or Y when one have the exact file and line ?
> 
> Very obvious I would think. One can develop ones own interactive class
> browser and code navigator.

 From the traceback ?

>  One can not bring up class help from "line 3
> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
> the class name I can navigate directly to all sorts of class related
> information without the need to delve into a physical usage of it e.g
> program.py at line 3.

Please bear with me, but I'm afraid I still don't get the point : I 
don't need tracebacks to get to some object's info (help etc).



From paul at boddie.org.uk  Fri May 23 13:48:13 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 23 May 2008 10:48:13 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com> 
	<4836dcfe$0$34544$742ec2ed@news.sonic.net>
Message-ID: <59f4d12d-8454-4c11-8629-3f9d827a8119@e39g2000hsf.googlegroups.com>

On 23 Mai, 17:18, John Nagle <na... at animats.com> wrote:
>
>      Exactly.  Although it seems counterintutive, it's not enough
> to do a COMMIT after UPDATE and INSERT operations.  You also have to
> do a COMMIT after a SELECT if you're going to reuse the database handle
> and do another SELECT.  Otherwise, you reread the same data forever.

You can also do a rollback, as I noted, since the aim is merely to
obtain a new transaction by discarding the current one. Upon
performing a new select using the DB-API such a new transaction will
then be obtained, since the rollback or commit will have ensured that
no transaction is currently open.

If the DB-API exposed the MySQL/PostgreSQL semantics with explicit
transactions (see [1] for pertinent material), then the technique
discussed above would either be superfluous (you might not be using
transactions at all) or more obvious (you would have issued an
explicit "start transaction" or "begin" command), but there are
obviously good arguments for exposing the standard semantics through
the API instead.

>      COMMIT, by the way, is per database handle, so if you have
> multiple database handles, each needs to handle its own COMMIT needs.

That's worth remembering, yes.

Paul

[1] http://www.postgresql.org/docs/8.1/static/sql-start-transaction.html


From stef.mientki at gmail.com  Sat May 24 09:49:19 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 15:49:19 +0200
Subject: Scipy+SQLite crashes... , was:  Re: SQLite import fails sometimes
 ?
In-Reply-To: <48381851$1@news.mel.dft.com.au>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>	<mailman.1523.1211631350.12834.python-list@python.org>
	<48381851$1@news.mel.dft.com.au>
Message-ID: <48381CDF.4090309@gmail.com>

John Machin wrote:
> Stef Mientki wrote:
>
>> I don't know if this matters, but I also use sqlite3 from other than 
>> Python programs.
>
> You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
> Python, and (I guess) you have another instance of sqlite3.dll 
> somewhere else, for use "from other than Python programs". Are they 
> the same version? If not, this may be the problem. Start up your other 
> application, then try to import sqlite3 from Python. If this is the 
> problem, and you must be able to run both apps simultaneously, you 
> will probably need to update one or the other.
>
> Cheers,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list
thanks John,

I think I hit the problem, ;-)
but I don't have a solution yet :-(

After creating the simplest program that did work :

 import sqlite3

I started adding every import statement used in my program,
until the program crashed,
and here is the simplest program that crashes:

 from scipy import *
 import sqlite3

Traceback (most recent call last):
  File "D:\Data_Python\P24_PyLab_Works\module1.py", line 2, in <module>
    import sqlite3
  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
    from dbapi2 import *
  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ImportError: DLL load failed: Invalid access to memory location.

Any solutions ?
(btw I need to do the *-import, because I create an easy user 
environment to do math and physics)

thanks,
Stef Mientki



From cjw at ncf.ca  Mon May 12 10:23:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Mon, 12 May 2008 10:23:01 -0400
Subject: Compiling Python using Microsoft Visual C++ 2008
Message-ID: <g09jsd$b2c$1@theodyn.ncf.ca>


1.I have both 2.5 and 2.6 but both 
appear, under Recent Projects, as 
pcbuild.  It would be helpful if the 
Python Version could be indicated.
2.With 2.6, Python compiles and executes 
OK but various packages are not 
compiled, eg sqlite3.
3.Pythonw compiles OK but not sqlite3.
4.Mike Fletcher suggests an approach 
(http://www.vrplumber.com/programming/mstoolkit/) 
with Visual C for Python 2.4.  Is this 
still the recommended way to compile 
Python 2.6?
5.Python 2.5 source refers to an Older 
Visual C.  Automatic conversion to 
Visual C 2008 gives the message ?Some of 
the properties associated with the 
solution could not be read.?  All 
projects except one had a single 
warning, there were no errors reported.
6.After conversion there is no python 
project, it is flagged ?unavailable?.
7.Pythoncore builds with no errors and 6 
warnings but there is no executable.
8.Python 2.5 build _tkinter fails ? 
tcl.h not found.

I would welcom advice on how to proceed.

Colin W.


From inhahe at gmail.com  Thu May 22 18:43:53 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:43:53 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<LymZj.61584$3v1.36344@bignews3.bellsouth.net>
Message-ID: <VFmZj.61588$3v1.40880@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:LymZj.61584$3v1.36344 at bignews3.bellsouth.net...

> crazy = True
> print foo['a',crazy]
>
just to clarify, you could use it like:
crazy = "I'm crazy" #this only has to be done once

print foo['a']          #not crazy
print foo['a',crazy] #crazy

(this may be totally unPythonic, i don't know.)






From ewertman at gmail.com  Wed May 21 12:23:31 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 21 May 2008 12:23:31 -0400
Subject: time module question - time zones
Message-ID: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>

I tend to deal with dates a lot in different formats and places...
typically I'll convert them to a time tuple with strptime(), and pass
them around like that before I need to write them back out.

One set of time/dates I'm getting are in UTC, but the string doesn't
say that specifically.  So I do this..  I had expected the outcome to
be offset properly (I'm EST5EDT).  But I'm obviously missing
something:

#!/usr/bin/env python

import time

utc_str = '2008-05-10 03:05:00 UTC'

d = time.strptime(utc_str,'%Y-%m-%d %H:%M:%S %Z')
t = time.mktime(d)

print d
print time.gmtime(t)
print time.localtime(t)

output :

(2008, 5, 10, 3, 5, 0, 5, 131, 0)
(2008, 5, 10, 8, 5, 0, 5, 131, 0)
(2008, 5, 10, 4, 5, 0, 5, 131, 1)


I believe that I should be getting (2008, 5, 9, 23, 5, 0, 5, 130, 1)
out of one of those, since the original 3:05am time was UTC, and my TZ
is currently -4.  Does that make sense?  I didn't even think I needed
to do any business with time.localtime() and time.gmtime().  I
expected  time.strftime() to return the locale appropriate time, but
it didn't.

TIA

Eric


From ivan.illarionov at gmail.com  Fri May 23 06:21:23 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 03:21:23 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
Message-ID: <2235cb81-cc56-404e-978b-35c2b09c976e@34g2000hsh.googlegroups.com>

On 23 ???, 02:20, Brad <b... at 16systems.com> wrote:
> cm_gui wrote:
> > Python is slow.
>
> It ain't C++, but it ain't a punch card either... somewhere in between.
> I find it suitable for lots of stuff. I use C++ when performance really
> matters tho... right tool for the job. Learn a good interpreted language
> (Pyhton) and a good compiled language (C or C++) and you'll be just
> fine. Until then, quit bitching.

  It's wrong. Here's why.

  Compare your statement to:
   "OP:  Humans are weak.
   "Brad:  They ain't gorillas, but they ain't insects either...
somewhere in between."

  Python is *not* in between C++ and something else.  It's far ahead
of them all.  Raw speed is not the most important thing in programming
languages like raw physical strength is not the most important thing
in life.
  Pure Python has less raw speed than most compiled-to-machine-code
languages, but it doesn't matter.  Python can be extended easily and,
most important, Python is smart.

  Ivan


From frederic.degraeve at gmail.com  Wed May 21 06:18:16 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Wed, 21 May 2008 03:18:16 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<bac13dbd-fac5-44e0-9470-17c2b6bc3b16@c65g2000hsa.googlegroups.com>
Message-ID: <c9f51bc2-eee8-4326-a7b6-f89480ecc876@b1g2000hsg.googlegroups.com>

I reply to myself!

>
> Boost.Python is also very known (but never tested by myself).
>

http://www.boost.org/doc/libs/1_35_0/libs/python/doc/tutorial/doc/html/index.html
here the example. I know that it has been made to simplify the
CPython's use and this is based on CPython.

Fr?d?ric


From python at bdurham.com  Sat May 17 16:23:55 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sat, 17 May 2008 16:23:55 -0400
Subject: multiple databases, what's the best interface ?
Message-ID: <1211055835.3828.1253706593@webmail.messagingengine.com>

Stef,

Take a look at what the dabo team has put together.

http://dabodev.com

Malcolm


From rossgk at gmail.com  Wed May 28 13:38:53 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 10:38:53 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
	<2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>
Message-ID: <1057dae0-43dd-477a-b686-5f79d0627161@27g2000hsf.googlegroups.com>


I've answered my own question about the "None" state - an event was
setting the thread to None where I didn't expect it.

However, my question slightly repositioned is if a Thread is "Stopped"
it still seems to exist. Is there someway to make it go away, send it
to garbage collection etc?

Other part of the original Q - I assume a Stopped thread gets a false
from "isAlive" and a Running thread gets a true?



From kyrie at uh.cu  Fri May  9 00:15:36 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 09 May 2008 00:15:36 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <48239601.1070200@cheimes.de>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
Message-ID: <1210306536.4823cfe8be627@comuh.uh.cu>


Quoting Christian Heimes <lists at cheimes.de>:

> Luis Zarrabeitia schrieb:
> >>>> 0**0
> > 1
> > 
> > That 0^0 should be a nan or exception, I guess, but not 1.
> 
> No, that's correct for floats. Read the wikipedia article or the C99
> standard for more information.

Weird, I can't find neither... (which wikipedia article? Couldn't find one about
C99.)
Don't take me wrong, I believe you... but I would really want to see the logic
behind that. I pretty much like the NaNs and Infs (and don't really understand
why python raises float division errors instead of them), but to have errors
pass with absolute silence seems dangerous even if it is useful sometimes
(Vandermonde example). I think I'd rather have python returning NaNs and
violating C99 on the 0**0=1, than to have 0**0=1 and not return NaNs.


-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie
--
"Al mundo nuevo corresponde la Universidad nueva"
UNIVERSIDAD DE LA HABANA
280 aniversario 


From zanwer at gmail.com  Thu May 22 05:39:24 2008
From: zanwer at gmail.com (Zaid Anwer)
Date: Thu, 22 May 2008 10:39:24 +0100
Subject: Sort contents of a file By date
Message-ID: <88002d8e0805220239w118c79c4rd026b5b857e642c9@mail.gmail.com>

Hi,

I have a query :-

Is there any command or link that could help me to sort the content of a
file by date.

File has couple of thousands lines every line starts with
timestamp(Date,Time) and then Log information.

It has some duplicate lines as well that has only timestamps same, I want to
remove the duplicate lines that has same time stamps.

Thanks in advance.
Regards,
Zee
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From pball.benetech at gmail.com  Mon May 26 17:23:40 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Mon, 26 May 2008 14:23:40 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
Message-ID: <98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>

I used Arnaud's suggestion with a few minor tweaks, as follows:

#-----
fset = frozenset
s0 = fset([1])
s1 = fset([1,2])
s2 = fset([2])

# let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
S = set([s1,s2])

# X is the "domain", C is the set of complements in X of elements of
S
X = set()
for s in S:
    X |= s
print "s0 is ", s0
print "S is ", S
print "X is ", X

C = set(fset(X - s) for s in S if fset(X-s))
print "C is ", C

# Find the "fibers" at each element x of s0.
# A fiber at x is the set of all s in S or C that contain x
from collections import defaultdict
fibers = defaultdict(list)
for s in S | C:
    for x in s & s0:
        fibers[x].append(s)
print "fibers are ", fibers

# Find the "seeds" at each x in s0.
# A seed at x is the set of all elements contained in all s in the
fiber at x.
# Intutively, a seed at x is the smallest set containing x that can
be
# built from S
seeds = set()
for F in fibers.itervalues():
    seeds &= set(F)
print 'seeds are ', seeds

# Now we know if there is a solution:
sol = set()
for s in seeds:
    sol |= s
if sol != s0:
    print "No solution"
else:
    print "Solution: union(intersection(fibers[x]) for x in s0)"
#-----

yields this:

s0 is frozenset([1])
S is  set([frozenset([1, 2]), frozenset([2])])
X is  set([1, 2])
C is  set([frozenset([1])])
fibers are  defaultdict(<type 'list'>, {1: [frozenset([1, 2]),
frozenset([1])]})
seeds are  set([])
No solution


I follow your logic up to the point of the "seeds," where I get a bit
confused. Thanks much! for the idea, I'm going to keep thinking about
it. Any other ideas are *most* welcome. -- PB.




From tjreedy at udel.edu  Wed May  7 15:10:26 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 7 May 2008 15:10:26 -0400
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org><bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com><fvsaoa$g46$1@aioe.org>
	<68dp9jF2sko92U1@mid.uni-berlin.de><fvsbgf$mev$1@aioe.org><1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
Message-ID: <fvsur0$78q$1@ger.gmane.org>


"pistacchio" <pistacchio at gmail.com> wrote in message 
news:fvsdlh$8l3$1 at aioe.org...

| well, it doesn't matter if it's a single file or a package, but it
| _does_ matter if you have to put them under the path where python is
| installed because, in a typical shared web hosting environment (such the
| one that i use) you don't have access to system directories.

When you do an import, the *first* place the interpreter looks is the 
*current* directory, which usually is the directory containing the main 
file.  That is because the first entry in sys.path is ''.  So put 
'template.py' in the same directory as my_web_code.py.  If necessary, one 
can add an entry to the beginning of sys.path.

No need to touch the site-packages directory.  The only reason to put 
something there is to make modules available to any code in any directory 
without putting a copy in each directory containing python files.

tjr






From tjreedy at udel.edu  Wed May 21 15:38:27 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 15:38:27 -0400
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com><mailman.1385.1211299351.12834.python-list@python.org>
	<9d9dadfe-3f91-44a6-8b1b-50fe8003046d@e39g2000hsf.googlegroups.com>
Message-ID: <g11tng$n40$1@ger.gmane.org>


"Paul Hankin" <paul.hankin at gmail.com> wrote in message 
news:9d9dadfe-3f91-44a6-8b1b-50fe8003046d at e39g2000hsf.googlegroups.com...
On May 20, 5:02 pm, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'

|def cleanup(s):
|    return filter(lambda x: x not in ' -', s)

Or
>>> s='8 58-2155-58'
>>> t=str.maketrans('','',' -')
>>> s.translate(t)
'858215558'






From ivan.illarionov at gmail.com  Thu May  1 13:30:49 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 17:30:49 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <fvcuo9$31i9$2@news.mtu.ru>

On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:

> On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
>> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> > IMO .ini-like config files are from the stone age. The modern
>> > approach is to use YAML (http://www.yaml.org).
>>
>> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and
>> so comprehensively and completely fails to achieve its stated main goal
>> of being "readable by humans", that I had assumed it was an April Fool
>> along the lines of Intercal or brainf***.
> 
> 
> YAML, ISTM, took a simple concept that worked for small, straightforward
> data, and tried to make into a format that could anything anywhere, with
> disastrous results.  It's not unlike Perl in this regard.  It's quite
> ridiculous.
> 
> 
> My recommendation to the OP would be:
> 
> If you intend to write a GUI that completely sets all the options, use
> XML.  You can bet there are some users who would prefer text editing
> options files, and XML, while not the most readable format available, at
> least gives users the option.
> 
> If you don't intend to write a GUI to do that, write a simple text file
> parser (if the options are simple), use ConfigParser, or use a Python
> file that you exec.
> 
> Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> ApplicationData/Appname/config.ext on Windows.  I don't recommend using
> the Windows registry to store options; use it to modify Windows behavior
> (like file associations) but keep your own program's options in your own
> file.
> 
> 
> Carl Banks

If you don't like YAML, use JSON or something similar -- XML is overkill 
and .INI is too limited.

-- 
Ivan


From alokkat at gmail.com  Mon May  5 16:00:35 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Mon, 5 May 2008 16:00:35 -0400
Subject: Python Minidom Help
Message-ID: <e3a81e680805051300x1ef9bc2axd0e2420a12a3cd89@mail.gmail.com>

Hi,

I am reading a XML data from  HTTP server and giving it to parse method.

dom = parse(dataread)

It throws following error

  File "/usr/lib/python2.3/site-packages/_xmlplus/dom/minidom.py", line
1908, in parse
    return expatbuilder.parse(file)
  File "/usr/lib/python2.3/site-packages/_xmlplus/dom/expatbuilder.py", line
922, in parse
    fp = open(file, 'rb')

Can anyone please help?

Regards
Alok Kumar
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From ivan.illarionov at gmail.com  Thu May  1 18:26:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 22:26:19 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
Message-ID: <fvdg2b$3ep$1@news.mtu.ru>

On Thu, 01 May 2008 23:03:38 +0200, Torsten Bronger wrote:

> Hall?chen!
> 
> Ivan Illarionov writes:
> 
>> [...]
>>
>> I took the example from
>> http://www.kuro5hin.org/story/2004/10/29/14225/062 I haven't use my own
>> example only because I don't have one at hand right now. YAML, in its
>> simple form, definetely makes me more productive. I wasted too much
>> time with XML in the past and I won't ever use it as a serialization or
>> config/settings format again. .INI/ConfigParser is too limited and has
>> no standards. I just don't see anything better than YAML to do human
>> and Python editable config files and to serialize information for later
>> use.
> 
> Okay, but serialisation is something completely different.  Nobody would
> use INI files for it.
> 
> For other things, it simply depends on the use case.  For example, I
> *know* that the configuration files of my pet project will not exceed
> the dumb section.key=value scheme so anything else would be overkill.
> 
> Besides, YAML adds another dependency.
> 
> Tsch?,
> Torsten.

For me it looks more like an old-school/new-school thing than use-case 
thing. I may be wrong, but I see more and more new projects use things 
like reST and YAML/JSON and it feels like they are gradually replacing 
traditional old-school solutions.

And I've got very strong impression that YAML is a the future of 
configuration files when Google released their App Engine.

Of course I may be wrong and it's just my opinion.

-- 
Ivan



From gagsl-py2 at yahoo.com.ar  Fri May 16 21:19:49 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 22:19:49 -0300
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
Message-ID: <op.ua9xzbirx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pupeno at pupeno.com>  
escribi?:

> Hello,
>
> I have an XML file that starts with:
>
> <vortaro>
> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> <kap>
>   <ofc>*</ofc>-<rad>a</rad>
> </kap>
>
> out of it, I'd like to extract something like (I'm just showing one
> structure, any structure as long as all data is there is fine):
>
> [("ofc", "*"), "-", ("rad", "a")]
>
> How can I do it? I managed to get the content of boths tags and the
> text up to the first tag ("\n   "), but not the - (and in other XML
> files, there's more text outside the elements).

Look for the "tail" attribute.

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Sat May 24 21:34:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:34:01 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
	<roy-73D0E0.18160424052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <87mymf9ng6.fsf@benfinney.id.au>

Roy Smith <roy at panix.com> writes:

> But, you are right, there are certainly cases which are difficult or
> impossible to test for. TDD is a very powerful tool, but it's just
> that: a tool. It's not a magic wand.
> 
> My suggestion is to make using TDD a habit, but don't turn it into a
> religion. You will undoubtedly find places where it's just the wrong
> tool.

All true.

I find it best to remember that the tests discussed in Behaviour
Driven Development are always *unit* tests: they test one small,
isolated unit of the application code, to ensure its behaviour is
correct given specific environment and inputs.

The cases where unit tests are not applicable include anything where
we want to assert behaviour of the entire application: performance
tests, acceptance tests, stress tests, etc.

Unit tests get a lot of discussion time simply because "test the
entire running application" isn't something many programmers will
disagree with, so they don't end up discussing it much. That doesn't
make unit tests *more* important; but it does mean more time is spent
convincing people that unit tests are *at least as* important as the
other tests.

> Don't let the fact that it can't do everything keep you from using
> it when it makes sense.

Yes.

-- 
 \        "Don't worry about people stealing your ideas. If your ideas |
  `\    are any good, you'll have to ram them down people's throats."  |
_o__)                                                  -- Howard Aiken |
Ben Finney


From python at bdurham.com  Sun May 18 14:20:11 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sun, 18 May 2008 14:20:11 -0400
Subject: Fwd: Re: [jcd@sdf.lonestar.org: Re: Compress a string]
Message-ID: <1211134811.29288.1253796369@webmail.messagingengine.com>

> I'm trying to compress a string.
> E.g:
>
>  "AAAABBBC" -> "ABC"

Doesn't preserve order, but insures uniqueness:

line = "AAAABBBC"
print ''.join( set( line ) )

Malcolm


From google at mrabarnett.plus.com  Fri May 23 22:23:35 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 23 May 2008 19:23:35 -0700 (PDT)
Subject: would this be called bug?
References: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>
Message-ID: <1644b511-b376-46c2-a8b4-780a08e2856f@34g2000hsh.googlegroups.com>

On May 24, 1:33 am, Amit Gupta <emaila... at gmail.com> wrote:
> The code is attached below. Basically I am taking a substring of
> variable m, and using "buffer" instead of slicing.
>
> However, the application of int on that buffer start correctly from
> the offset, but it scans all the way to the end, instead of stopping
> at the length of the buffer.
>
> It works however, if I apply str function to output of buffer
> function.
>
> -A
>
> (Pdb) m = "AA1234AA"
> (Pdb) x = buffer(m, 2, 4)
> (Pdb) x
> <read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
> (Pdb) int(x)
> *** ValueError: invalid literal for int() with base 10: '1234AA'
> (Pdb) m = "AA1234AA"
> (Pdb) m = "AA1234"
> (Pdb) x = buffer(m, 2, 4)
> (Pdb) int(x)
> 1234
> (Pdb)

Interestingly, if I try:

int(x, 10)

I get:

Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    int(x, 10)
TypeError: int() can't convert non-string with explicit base

Perhaps int(x) should also be complaining that x isn't a string.


From martin at v.loewis.de  Mon May 12 10:36:15 2008
From: martin at v.loewis.de (=?windows-1252?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 16:36:15 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09jsd$b2c$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
Message-ID: <482855df$0$14196$9b622d9e@news.freenet.de>

> 1.I have both 2.5 and 2.6 but both appear, under Recent Projects, as
> pcbuild.  It would be helpful if the Python Version could be indicated.

Hover over the link, and it will display the full path, which you can
then infer to reason about the specific copy of Python you are using.

In any case, compiling Python 2.5 with VS 2008 is not supported.

> 2.With 2.6, Python compiles and executes OK but various packages are not
> compiled, eg sqlite3.

See PCbuild/readme.txt.

> 3.Pythonw compiles OK but not sqlite3.

So what's the error?

> 4.Mike Fletcher suggests an approach
> (http://www.vrplumber.com/programming/mstoolkit/) with Visual C for
> Python 2.4.  Is this still the recommended way to compile Python 2.6?

No. Either use the full product, or the express edition. Neither
requires and additional setup.

> 5.Python 2.5 source refers to an Older Visual C.  Automatic conversion
> to Visual C 2008 gives the message ?Some of the properties associated
> with the solution could not be read.?  All projects except one had a
> single warning, there were no errors reported.
> 6.After conversion there is no python project, it is flagged ?unavailable?.

See above. This procedure is not supported; you are on your own.
Get a copy of VS 2003 if you want to follow the official
recommendations.

> 7.Pythoncore builds with no errors and 6 warnings but there is no
> executable.
> 8.Python 2.5 build _tkinter fails ? tcl.h not found.

See PCbuild/readme.txt.

Regards,
Martin


From inhahe at gmail.com  Sun May 18 17:35:54 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 17:35:54 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <vi1Yj.144433$Er2.142300@bignews6.bellsouth.net>

i see lots of neat one-liner solutions but just for the sake of argument:

def compress_str(str):
     new_str = ""
     lc = ""
     for c in str:
        if c != lc: new_str.append(c)
     return new_str


"Matt Porter" <mabbikeel at gmail.com> wrote in message 
news:mailman.1315.1211133997.12834.python-list at python.org...
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
>
>
> Cheers
> Matt
> -- 
> --
> 




From dmitrey.kroshko at scipy.org  Fri May  9 06:25:12 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:25:12 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
Message-ID: <ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>

Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
(preferable) 2.3 compatible.
Are there other solutions?
D.

On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > and
> > list2 = [0, 2, 4] # integer elements
>
> > howto (I mean most simple recipe, of course) form list3 that contains
> > elements from list1 with indexes from list2, i.e.
>
> list3 = [list1[i] for i in list2]
>
> --
> Paul Hankin



From lew at lewscanon.com  Thu May 15 01:04:30 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 15 May 2008 01:04:30 -0400
Subject: generate all possible math expr of one term
In-Reply-To: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
References: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
Message-ID: <W5udnbDVHPXCWbbVnZ2dnUVZ_qninZ2d@comcast.com>

xahlee at gmail.com wrote:
>  ?Xah Lee, 2005

Blah, blah, blah.  Plonk.

-- 
Lew


From paddy3118 at googlemail.com  Fri May  9 13:30:24 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 9 May 2008 10:30:24 -0700 (PDT)
Subject: Wanted: Citation supporting Duck Typing
Message-ID: <2385391e-f550-43be-b52e-cc23ba4f5381@d45g2000hsc.googlegroups.com>

Hi,
The wikipedia article on Duck Typing has this criticism section that
needs a citation:
(Fron: http://en.wikipedia.org/wiki/Duck_typing#Criticism)

An often cited criticism is this:
    One issue with duck typing is that it forces the programmer to
have a much wider understanding of the code he or she is working with
at any given time. In a strongly and statically typed language that
uses type hierarchies and parameter type checking, it's much harder to
supply an unexpected object type to a class. For instance, in python,
you could easily create a class called Wine, which expects a class
implementing the "press" method as an ingredient. However, a class
called Trousers might also implement the press() method. With Duck
Typing, in order to prevent strange, hard to detect errors, the coder
needs to be aware of each potential use of the method "press", even
when it's conceptually unrelated to what he or she is working on. With
type checking and hierarchical type declarations, all wine ingredients
would be subclasses of WineIngredient or something like that, negating
the problem.

    In essence, the problem is that, "if it walks like a duck and
quacks like a duck", it could be a dragon doing a duck impersonation.
You may not always want to let dragons into a pond, even if they can
impersonate a duck.

In practice, the issue is equivalent to not mixing dissimilar objects
for duck-typing and is handled almost transparently as part of the
knowledge of the codebase required to maintain it.[citation needed]


I've only found this so far as a citation:
  http://jessenoller.com/2007/05/30/typeducking-on-duck-vs-static-typing/
Whilst it is good, do you know any other work that refutes the
criticism?

(I, and many others don't see the problem, but who has written about
it).

Thanks, Paddy.


From s0suk3 at gmail.com  Thu May  8 04:38:30 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 8 May 2008 01:38:30 -0700 (PDT)
Subject: How to gather information about the system hardware?
References: <mailman.736.1210230874.12834.python-list@python.org>
Message-ID: <d207dd7d-bb08-481d-88cc-ae12e4a37cf8@a70g2000hsh.googlegroups.com>

On May 8, 2:14 am, "Florencio Cano" <florencio.c... at gmail.com> wrote:
> Hi,
> I'm looking for a method of gathering information about the system
> hardware and software installed using Python. I would like to do it in
> UNIX and in Windows. I think that it would be good in Windows to look
> in the registry and be able to parse and search it. Any pointer to
> information would be appreciated.
> Thanks.


The 'platform' module gives a lot of information about the hardware
and OS. To access the Windows Registry, you can use the '_winreg'
module.


From sachin.vijayan80 at gmail.com  Fri May 30 04:24:47 2008
From: sachin.vijayan80 at gmail.com (sachin.vijayan80 at gmail.com)
Date: Fri, 30 May 2008 01:24:47 -0700 (PDT)
Subject: free computer studies
Message-ID: <34ffa522-edf1-47fb-beed-9ca4516a77ac@x19g2000prg.googlegroups.com>

free computer studies
free computer programmes
free computer education
http://foodplantss.blogspot.com/


From robbie at fordpinto.com  Sat May 24 17:18:35 2008
From: robbie at fordpinto.com (Robbie)
Date: Sat, 24 May 2008 14:18:35 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
Message-ID: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>

Hello All,

Hopefully this is an easy question: I'd like to use a .pth file on my
Macintosh so that I can easily import modules that I've created in my
own working directory. I've created a file called Robbie.pth. It
includes a single line:
     /Robbie/PythonWork

I can't seem to figure out where to put this file so that Python will
recognize it when I start it up. I know that the path is correct
because if I do the command sys.path.append('/Robbie/PythonWork') then
everything works as expected. I just don't want to have to execute
this command every time I start Python.

I've looked at what's in sys.path, and have tried putting the file in
various of the directories listed, to no avail. I've also tried
putting it in the same directory where IDLE is (/Applications/
MacPython 2.5) and that doesn't work either.

What am I missing?

FYI I'm running MaxOS 10.4.8 and Python 2.5,

Thank you in advance for the help.

-Robbie


From mccredie at gmail.com  Mon May 12 12:29:09 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 12 May 2008 09:29:09 -0700 (PDT)
Subject: passing *args "recursively"
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <91793037-bfaf-4d63-b19d-e7be5731481a@x19g2000prg.googlegroups.com>

On May 12, 9:19 am, Guillermo <guillermo.lis... at googlemail.com> wrote:
> Hi,
>
> This must be very basic, but how'd you pass the same *args several
> levels deep?
>
> def func2(*args)
>
>     print args # ((1, 2, 3),)
>     # i want this to output (1, 2, 3) as func1!
>     # there must be some better way than args[0]?
>
> def func1(*args):
>
>     print args # (1, 2, 3)
>     func2(args)
>
> func1(1,2,3)
>
> Thanks!
>
> Guillermo

def func1(*args):
    print args
    func2(*args) # don't forget the '*'

Matt


From cjw at ncf.ca  Sat May 10 18:19:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 10 May 2008 18:19:01 -0400
Subject: test
Message-ID: <48261F55.50205@ncf.ca>

test


From kyosohma at gmail.com  Tue May 20 08:56:22 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 05:56:22 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <ed2fbf6e-346e-48dd-b205-950e5e039ab2@s50g2000hsb.googlegroups.com>

On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
>
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
>
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
>
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> Thanks in advance,
> Eli

One way I forgot to mention is to put Python on the network (i.e. the
intranet). We do that here at work and I can develop my applications
on my machine and then put them on there for anyone to use. That way
they never have to install Python, let alone the bother of installing
dependencies.

Mike


From gray.bowman at gmail.com  Thu May 22 16:56:33 2008
From: gray.bowman at gmail.com (gray.bowman at gmail.com)
Date: Thu, 22 May 2008 13:56:33 -0700 (PDT)
Subject: where is the Write method of ElementTree??
Message-ID: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>

I'm messing around with trying to write an xml file using
xml.etree.ElementTree.  All the examples on the internet show the use
of ElementTree.write(), although when I try to use it it's not
available, gives me ...

   ElementTree(sectionElement).write("section.xml")
TypeError: 'module' object is not callable


I'm new to python, so I think I'm doing something wrong.. any
thoughts?

Thanks.'


See code below:

# Create xml structure
sectionElement = ElementTree.Element("section")

# step through feed result and create elements for each article -
result[article]
for article in feedResult:
    articleElement = ElementTree.Element("article")

    titleElement = ElementTree.SubElement(articleElement, "title")
    titleElement.text = article['title']

    bodyElement = ElementTree.SubElement(articleElement, "body")
    bodyElement.text = article['body']

    sectionElement.append(articleElement)

#print ElementTree.tostring(sectionElement)
ElementTree(sectionElement).write("section.xml")


From hniksic at xemacs.org  Tue May 20 10:14:19 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 20 May 2008 16:14:19 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
Message-ID: <874p8tawqs.fsf@mulj.homelinux.net>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> bearophileHUGS at lycos.com wrote:
>
>> John Salerno:
>>> What does everyone think about this?
>> 
>> The Example 2 builds a list, that is then thrown away. It's just a
>> waste of memory (and time).
>
> No, it doesn't.

This line:

    [new.append(c) for c in s if c not in new]

...throws away the list built by the comprehension itself, composed of
None values (returned by append).

> It uses append because it refers to itself in the if-expression. So
> the append(c) is needed

The append is not in question here.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:24:21 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:24:21 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
	<1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>
Message-ID: <482be51a$0$20002$426a34cc@news.free.fr>

vbgunz a ?crit :
>>>> Instance methods make the most sense. A static method makes sense too
>>>> *but* I can see how a class method not only does what a static method
>>>> does but how a class method *also* gets the cls reference for free.
>>> I don't understand the last part - but I certainly agree on the "instance
>>> methods make the most sense". But *if* you want a hierarchy
>>> of "sensefulness",
>>> method > classmethod > staticmethod
> 
> Sorry I quoted this earlier and meant to respond to it. What I meant
> was, might as well use a class method over a static method AND in
> doing so, cls is free.

cf Georges Sakkis point about this. 'cls is free' ? Well, not 
necessarily. Your function must take the class as first argument, and so 
you just can't use just any plain function as a classmethod.



From vlastimil.brom at gmail.com  Sun May  4 17:07:55 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Sun, 4 May 2008 23:07:55 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
Message-ID: <9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>

>
>
> Thank you very much for your comprehensive answer and detailed
informations, David; I really appreciate it!

As for the number of items, there would be approx. 34 000 calls of execute()
in my present code, in the
final version probably more; I think executmany is more efficient
here, if there aren't any drawbacks.
You are right, I should definitely use the standard approaches also usable
in other databases, rather than relying on the specific behaviour of sqlite3
(althought for the current task - an embeded, lightweight, in memory db,
sqlite seems to be an obvious choice).

Thanks for your comments on the concept,that's exactly, what I needed;
actually my
current version using sqlite3 is a reimplementation; the previous
script used nested dicts (as
the most suitable built-in data structure, I knew
of). In this older version the lookups for a tag
values given the text index were ok (as the indices are keys in the main
dict), however the other way (retrieving the index given a certain
combination of tag values)
is much harder and requires nested loops over the entire data on each query (or
alternatively multiple parallel dicts "keyed" on the available tag values).
I thought a database would perform much better in such cases (and the
preliminary tests confirm this); however now I see the possible risks too.
I'll look into other possible approaches. There will be clearly a
finite set of the
column names, hence it is possible to define the db at the beginning
and fill it with values only
after parsing the texts; the problem is, this can't be done untill the
texts are available, I just thought, a more generic
approach would be be more easily extensible and also a bit simpler.

As for the usage of the db in my
app, everything is simple, single threaded,  the parsing the text to get the
tags with their values are done in the program itself, hence it can be
controlled, as well as the text sources themselves; furthermore, there won't
be any explicit user queries of
SQL, all of them are programmatic - e.g. a text is displayed on the
screen and the information about the given line should
be retrieved and displayed (like chapter, verse
nr.) or vice versa - the user selects some property (e.g. beginning of
a certain chapter) and the text should be
scrolled to make the corresponding position visible.

Just for information, what are valid table and
column names in sqlite? (Unfortunately, I couldn't find any reference for
that (maybe except the reserved sqlite_master);  as quoted names, everything
I tried, worked
fine, also whitespace, various unicode characters etc.; of course, I
can imagine, that e.g. supplying a quote would
cause problems ... )

Thanks once more for your help,
                                  Vlasta
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From hniksic at xemacs.org  Thu May  8 04:10:18 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 08 May 2008 10:10:18 +0200
Subject: Problems with os.walk
References: <mailman.738.1210231614.12834.python-list@python.org>
Message-ID: <877ie52p3p.fsf@mulj.homelinux.net>

<Dominique.Holzwarth at ch.delarue.com> writes:

>     (dirpath, dirnames, filenames) = os.walk(scriptPath)

You're supposed to loop over values in different directories, like
this:

for dirpath, dirnames, filenames in os.walk(scriptPath):
    ... handle dirpath with dirnames and filenames ...

The loop will be executed for each subdirectory (direct and indirect)
of scriptPath.


From larudwer at freenet.de  Thu May 22 06:51:30 2008
From: larudwer at freenet.de (Ruediger)
Date: Thu, 22 May 2008 12:51:30 +0200
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<g0mab2$pkt$1@aioe.org>
	<51336537-0374-470a-a243-c6aa01e1fe9a@59g2000hsb.googlegroups.com>
Message-ID: <g13il8$ve9$1@aioe.org>

Paul Hankin wrote:


> This is better written using takewhile...
> itertools.takewhile(lambda x: x != value, iterable)
> 
> But if you really need to reinvent the wheel, perhaps this is simpler?
> 
> def test(iterable, value, op=operator.ne):
>     for x in iterable:
>         if not op(x, value):
>             return
>         yield x


yes you are right it is. However as i mentioned in my post i came up with an
solution 'like' that. In fact my original code was to complex to post.
While simplifying it, i've overseen the obvious solution.

For special cases where you need to do more complex tests, the best solution
is IMHO to hide it in an generator function like above.





From mensanator at aol.com  Fri May  2 16:49:25 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 13:49:25 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com>
Message-ID: <7c197680-2a56-44ec-b414-67c72b6a9ce9@d1g2000hsg.googlegroups.com>

On May 2, 2:57?pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
>
> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > > Shawn Milochik wrote:
> > > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > > can this be done in Gmail?
>
> > > Set up a filter that looks for some phrase in the mail headers that
> > > identifies messages originating from google groups. ?Gmail's filters are
> > > fairly flexible. ?I'd probably just have it look for certain words.
> > > Look at an e-mail's source (raw view) and particularly check in the
> > > headers for things to filter by.
>
> > Why don't you just block all messages from Gmail?
>
> Look up the term "false positive" before you make such brilliant
> suggestions in the future.

_I_ understand it. Perhaps you should give this advice to the
ones who suggest blocking Google Groups.

>
> Posting-from-google-groups-ly yrs,
>
> George



From darcy at druid.net  Fri May  2 10:52:37 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 10:52:37 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <87y76ssrx0.fsf@physik.rwth-aachen.de>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<87y76ssrx0.fsf@physik.rwth-aachen.de>
Message-ID: <20080502105237.85d91f5d.darcy@druid.net>

On Fri, 02 May 2008 16:26:51 +0200
Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> > Certainly #! /usr/bin/python is fine if you never expect your
> > software to run outside of your own little corner of the world but
> > you asked why people prefer the env version and the answer is that
> > we want to write software that runs everywhere that Python runs.
> 
> Granted, but you must draw the line somewhere anyway.  I cannot

No one is talking about if statements here.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From gnewsg at gmail.com  Tue May 13 21:20:29 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 18:20:29 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1092.1210726578.12834.python-list@python.org>
Message-ID: <575bc914-c702-42c1-a6e5-e911e68187b9@c65g2000hsa.googlegroups.com>

On 14 Mag, 02:56, Jean-Paul Calderone <exar... at divmod.com> wrote:

> Why? ?Isn't this why subtraction exists? ?If there is a call scheduled to
> happen at T1 and the current time is T2, then I know that after (T1 - T2)
> elapses, it will be time to run the call. ?Why do I have to do any checks
> at all? ?I just tell select() to wait that long. ?Presumably this is just
> what someone will do if they want to use asyncore with timed calls. ?Call
> asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

That doesn't work if I decide to schedule one or more calls AFTER the
loop has started (see: "I already told select what timeout use").
As far as I've understood by reading the Twisted core what happens is
that there's a heap of scheduled calls and a loop that keeps calling
time.time() to check the scheduled functions due to expire soonest.
I've also proposed a patch for asyncore using the same approach:
http://bugs.python.org/issue1641

> So, actually, I'm not sure what the disagreement is about. ;) ?

The current disagreement is about how Twisted timed events are
implemented. :)

>?On the other hand, I didn't
> this thread (or maybe just this part of the thread) start out with
> a question about asyncore throughput? ?I have no idea what that
> might have to do with this.

Nothing, we just finished OT. :)


--- Giampaolo
http://code.google.com/p/pyftpdlib


From jphalip at gmail.com  Fri May  9 02:55:16 2008
From: jphalip at gmail.com (Julien)
Date: Thu, 8 May 2008 23:55:16 -0700 (PDT)
Subject: Saving an audio file's waveform into an image
Message-ID: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>

Hi,

I would like to pull out the waveform of an audio file and save it
into an image file, for example in GIF format. Is that achievable, and
if so, how?

I heard about the Snack module, but the project looks dead and un-
maintained.

Your advice would be greatly appreciated.

Thanks!

Julien


From paul.hankin at gmail.com  Mon May 12 11:35:37 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Mon, 12 May 2008 08:35:37 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> 
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
Message-ID: <c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>

On May 12, 1:59 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On May 12, 1:30 pm, John Machin <sjmac... at lexicon.net> wrote:
>
> > Duncan Booth wrote:
> [...]
> > > I think the variant I came up with is a bit clearer:
>
> > > for i in range(1,101):
> > >    print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>
> > More than a bit clearer, IMO. How about
> >      print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
> > (or perhaps
> >      print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
> > to save looking up the precedence rules) ?
>
> Stuff clarity!  How about
>
> for i in xrange(1, 101):
>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i

for i in xrange(1, 101):
    print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

--
Paul Hankin


From duncan.booth at invalid.invalid  Fri May  2 04:54:21 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 08:54:21 GMT
Subject: my module and unittest contend over commandline options...
References: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>
Message-ID: <Xns9A9264BA67F0duncanbooth@127.0.0.1>

chrisber <christophberendes at gmail.com> wrote:

> I've poked around to see if I could delete the options my earlier code
> consumed from the commandline buffer, before invoking unittest, but
> that seems klugy. Instead, I hardwired  in a testing config file name,
> that always has to be local. That works pretty well, but it leaves me
> wonderfing whether there would have been another clean way to allow
> both my test code and unittest to have options without interfering
> with one another.
> 

You can pass argv as a parameter to main(), so I think the best bet is 
simply to build up a new argv with the options that you want to pass 
through.

Another option would be to subclass unittest.TestProgram and override 
parseArgs, but you'd have to copy & modify it as it doesn't seem to have 
been designed to be easily extendable.


From rsoh.woodhouse at googlemail.com  Wed May 28 17:38:42 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 14:38:42 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
	<6a60t2F35v9uuU1@mid.uni-berlin.de>
Message-ID: <44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>

On May 28, 10:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> rsoh.woodho... at googlemail.com schrieb:
>
> >>> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >>>> rsoh.woodho... at googlemail.com schrieb:
> >>>>> Hi,
> >>>>> I'm trying to work out some strange (to me) behaviour that I see when
> >>>>> running a python script in two different ways (I've inherited some
> >>>>> code that needs to be maintained and integrated with another lump of
> >>>>> code). The sample script is:
> >>>>> # Sample script, simply create a new thread and run a
> >>>>> # regular expression match in it.
> >>>>> import re
> >>>>> import threading
> >>>>> class TestThread(threading.Thread):
> >>>>>     def run(self):
> >>>>>         print('start')
> >>>>>         try:
> >>>>>             re.search('mmm', 'mmmm')
> >>>>>         except Exception, e:
> >>>>>             print e
> >>>>>         print('finish')
> >>>>> tmpThread = TestThread()
> >>>>> tmpThread.start()
> >>>>> tmpThread.join()
> >>>>> import time
> >>>>> for i in range(10):
> >>>>>     time.sleep(0.5)
> >>>>>     print i
> >>>>> # end of sample script
> >>>>> Now if I run this using:
> >>>>> $ python ThreadTest.py
> >>>>> then it behaves as expected, ie an output like:
> >>>>> start
> >>>>> finish
> >>>>> 0
> >>>>> 1
> >>>>> 2
> >>>>> ...
> >>>>> But if I run it as follows (how the inherited code was started):
> >>>>> $ python -c "import TestThread"
> >>>>> then I just get:
> >>>>> start
> >>>>> I know how to get around the problem but could someone with more
> >>>>> knowledge of how python works explain why this is the case?
> >>>> Works for me. And I don't see any reason why it shouldn't for you -
> >>>> unless you didn't show us the actual code.
> >>>> Diez
> >>> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> >>> on Ubuntu 7.10. Which version of python/what platform were you using?
> >> mac-dir:/tmp deets$ python
> >> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
> >> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> >> Type "help", "copyright", "credits" or "license" for more information.
> >> Welcome to rlcompleter2 0.96
> >> for nice experiences hit <tab> multiple times
>
> >> But I doubt this changes anything.
>
> >> Diez
>
> > Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
> > Python 2.4.5 on Debian and get the same results as I had before.
>
> Are you sure that ThreadTest isn't a somewhere else installed module?
> youc can use python -v to check where python gets it's files.
>
> and how about you attach/paste the full script somewhere?
>
> Diez

This is the full script straight from the text editor:

# START

import re

import threading
class TestThread(threading.Thread):

    def run(self):
        print('start')
        try:
            re.search('mmm', 'mmmm')
        except Exception, e:
            print e
        print('finish')

tmpThread = TestThread()
tmpThread.start()
tmpThread.join()
import time
for i in range(10):
    time.sleep(0.5)
    print i

# END

In OS X I get the following output (where TestThread.py is in the
current directory):

$ python -v -c "import TestThread"
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
site.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/site.py
import site # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/site.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
os.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/os.py
import os # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/os.pyc
import posix # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
posixpath.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/posixpath.py
import posixpath # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/posixpath.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
stat.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/stat.py
import stat # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/stat.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
UserDict.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/UserDict.py
import UserDict # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/UserDict.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
copy_reg.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/copy_reg.py
import copy_reg # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/copy_reg.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
types.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/types.py
import types # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/types.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
warnings.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/warnings.py
import warnings # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/warnings.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
linecache.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/linecache.py
import linecache # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/linecache.pyc
import encodings # directory /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/__init__.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/__init__.py
import encodings # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/__init__.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
codecs.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/codecs.py
import codecs # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/codecs.pyc
import _codecs # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/aliases.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/aliases.py
import encodings.aliases # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/aliases.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/ascii.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/ascii.py
import encodings.ascii # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/ascii.pyc
Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
import TestThread # from TestThread.py
# wrote TestThread.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
re.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/re.py
import re # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/re.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/sre.py
import sre # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/sre.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_compile.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/sre_compile.py
import sre_compile # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_compile.pyc
import _sre # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_constants.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/sre_constants.py
import sre_constants # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_constants.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_parse.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/sre_parse.py
import sre_parse # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_parse.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
threading.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/threading.py
import threading # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/threading.pyc
import thread # builtin
import time # dynamically loaded from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/lib-dynload/time.so
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
traceback.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/traceback.py
import traceback # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/traceback.pyc
import collections # dynamically loaded from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/lib-dynload/collections.so
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
atexit.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/atexit.py
import atexit # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/atexit.pyc
start


At which point it just hangs.

Thanks,
Rowan


From bruno.desthuilliers at gmail.com  Wed May 14 17:30:07 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:30:07 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
Message-ID: <e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>

> Dave Parker schrieb:

> > All of the calculators and textbooks that elementary school students
> > use, use "^" for powers.

I've never seen this symbol in textbooks. In textbooks, powers are
written using superscript.

>>  Just like Flaming Thunder does.  I haven't
> > seen "**" for powers since FORTRAN.

I haven't seen any language using '^' as the power operator so far -
but I've seen quite a lot of them using it as the bitwise XOR operator.


From daveparker at flamingthunder.com  Wed May 21 10:55:52 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 07:55:52 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
	<60f15334-e7fa-4a27-add1-5f4fd2e14276@w4g2000prd.googlegroups.com>
Message-ID: <0abd45df-5303-47c6-a2d3-778f0cb6cdd8@w4g2000prd.googlegroups.com>

> Personally (and borrowing from Python), I'd prefer something more
> like:
>
> Write "Fa".
> Repeat 8 times:
>     Write "-la".

I actually kind of prefer that, too.  Or

Repeat 8 times write "-la".

I'll think about it.  Thank you for suggesting it.

On May 20, 3:40?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 20, 4:20 am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
>
>
> > > > I <davepar... at flamingthunder.com> wrote:
> > > > Plus, me getting paid to work on Flaming Thunder is far more
> > > > motivating than me not getting paid to work on Python.
> > > On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > > That's truly disappointing.
>
> > I guess I could have stated that better. ?Flaming Thunder is a labor
> > of love for me. ?I've programmed in almost every language since
> > FORTRAN and Lisp, and Flaming Thunder is the language I've always
> > wished the others were.
>
> > For one example, I've always preferred compiled languages because
> > they're faster. ?So Flaming Thunder is compiled.
>
> > For another example, I've always preferred languages that are English-
> > like because it's easier to return to your code after several years
> > and still know what you were doing (and it's easier for someone else
> > to maintain your code).
>
> > For over 5 years I've been working on Flaming Thunder unpaid and on my
> > own, getting the back-end up and running. ?8-by-8 shotgun cross
> > compilers written in assembly language, that can fit all of the
> > libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
> > OS X and Windows into a single executable file that's less than 180K,
> > aren't written overnight.
>
> > So now that I've released it, it's extremely gratifying that people
> > think it's cool enough to actually pay $19 for it. ?That gives me lots
> > of motivation (and buys enough time) for me to add features to it as
> > fast as possible.
>
> > To whit: you pointed out the awkwardness in Python of having to
> > declare a for-loop variable when you only wanted to loop a specific
> > number of times and didn't need the variable. ?Last week, Flaming
> > Thunder had the same awkwardness. ?If you wanted to loop 8 times:
>
> > for i from 1 to 8 do <statement>
>
> > you still had to use a variable (in this case, i). ?This week, I've
> > added two new for-loop variations that fix that awkwardness, and also
> > allow you to explicitly declare an infinite loop without having to
> > rely on idiomatic constructs such as while-true. ?Examples of the two
> > new variations (for-forever and for-expression-times):
>
> > Write "Fa".
> > For 8 times do write "-la".
>
> Personally (and borrowing from Python), I'd prefer something more
> like:
>
> Write "Fa".
> Repeat 8 times:
> ? ? Write "-la".
>
> > For forever do
> > ? (
> > ? Write "Do you know the definition of insanity? ".
> > ? Read response.
> > ? ).
>
> Repeat:
> ? ? Write "Do you know the definition of insanity? ".
> ? ? Read response.- Hide quoted text -
>
> - Show quoted text -



From deets at nospam.web.de  Thu May  1 08:34:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 May 2008 14:34:17 +0200
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <67trmcF2qeo0mU1@mid.uni-berlin.de>

Lance Gamet schrieb:
> Hi, python beginner starting a new project here.
> 
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
> 
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
> 
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
> 
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
> 
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.

I'd go for .file in ConfigParser-format that resides in the users 
home-directory. ConfigParser is a standard lib module for .ini-like files.


Diez


From bgporter at acm.org  Tue May  6 07:14:49 2008
From: bgporter at acm.org (Brett g Porter)
Date: Tue, 06 May 2008 07:14:49 -0400
Subject: Python MIDI in 2008
In-Reply-To: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <48203DA9.1090408@acm.org>

Maciej Blizi?ski wrote:
> For the last couple of days, I've been looking for a Python midi
> library. I'm generally interested in sending MIDI events via ALSA. It
> seems like everything out there is pretty old; packages are from 2003
> or 2005. Some packages don't seem to be really used, for instance
> portmidi doesn't even support installing it system-wide; you can
> compile it and... no make install for you.
> 
I haven't used the PortMidi bindings that are in the Cheeseshop at 
http://pypi.python.org/pypi/pyPortMidi/0.0.3

but I've used PortMidi extensively from C++ code and have had excellent 
results with it.


From PurpleServerMonkey at gmail.com  Sat May 24 20:04:27 2008
From: PurpleServerMonkey at gmail.com (PurpleServerMonkey)
Date: Sat, 24 May 2008 17:04:27 -0700 (PDT)
Subject: Python, Daemons and D-Bus
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
	<g19rcb$pjt$02$1@news.t-online.com>
Message-ID: <24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>

On May 25, 5:46?am, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
wrote:
> [ PurpleServerMonkey <PurpleServerMon... at gmail.com> ]
>
> > Would you use D-Bus or a more traditional IPC method such as sockets?
> > Although D-Bus is relatively new it looks interesting, just not sure
> > it would work well in this kind of project.
>
> DBus is not really intended for private communication between processes of
> the same application, but more for intercommunication between different
> applications. ?If the IPC interface of your backend daemons is intended to
> be used by other applications, DBus is the right choice, otherwise I would
> choose something different.
>
> The reason is, that DBus doesn't know about applications. ?It exposes all
> objects registered on the bus to every DBus client on the system and so
> makes you application-private API available to the public (and spams the
> bus with lots of generally useless objects ;) ).
>
> In case your IPC interface is application private, a custom IPC protocol
> (probably using XML RPC over unix sockets) is better suited.
>
> Moreover you should make your choice dependent on the type of data you
> transmit. ?Both DBus and XML-RPC wrap calls into XML messages, which is
> terribly inefficient for large binary data.
>
> --
> Freedom is always the freedom of dissenters.
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (Rosa Luxemburg)

Thanks Sebastian,

Your comments make a lot of sense. I was thinking of creating a custom
session channel and using that for my purposes but as you mentioned
it's not very secure and I do want to keep the server to daemon
traffic private, the server has an XML-RPC interface with a public
API.

Will definitely look at using a different IPC mechanism for this part
of the project.


From dmitrey.kroshko at scipy.org  Sun May 18 03:10:29 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 00:10:29 -0700 (PDT)
Subject: howto use pylint from Eric IDE?
Message-ID: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>

Hi all,

I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
cannot find how to use pylint from Eric IDE GUI.
Does anyone know?

Thank you in advance, D.


From onsen-neko at gmx.net  Wed May  7 15:19:30 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Wed, 7 May 2008 21:19:30 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
Message-ID: <200805072119.30744.onsen-neko@gmx.net>

Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:

> If so, then it looks like an Interface is a generic class with method
> stubs. You can do that with Python just as easily by creating empty
> methods with just the "pass" keyword. 

Well, no. It's a litte different. Interfaces force to implement methods. 
Simple inheritance with method-stubs can't garantee that a specific 
method is reimplementat in a sub-class. Interfaces work at 
compile-time, while method-stubs raise at their first call, so in worst 
case, never (when the developer is available). 

> Since it's just a construct to implement polymorphism, I don't think
> you'll lose anything. However, Python does not require you to re-
> implement every method of the class it is inheriting from. 

That's the point. Interfaces garantee that a duck is a duck, an not only 
a chicken that quack. 

> You can just override those that you want and leave the others alone.

Not always desirable. But often enough ;)


From ivan.illarionov at gmail.com  Mon May 26 20:36:23 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 17:36:23 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <483a1319$0$34516$742ec2ed@news.sonic.net>
	<g1f91t$rvh$1@aioe.org>
Message-ID: <715e1a8a-0f93-4f42-80d9-4772842a5b1a@b1g2000hsg.googlegroups.com>

On May 27, 1:11?am, Martin Manns <mma... at gmx.net> wrote:
> On Sun, 25 May 2008 18:46:27 -0700
>
> John Nagle <na... at animats.com> wrote:
> > >>>> func_strings=['x', 'x+1', 'x+2', 'x']
> > >>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>
> > ? ?What are you actually trying to do, anyway? ?What's the
> > application?
>
> > ? ?You probably don't want to use "eval" that way. ?If you want
> > function objects out, use "compile".
>
> I am writing on an application that I call pyspread
> (http://pyspread.sourceforge.net).
> It provides a grid (mapped to a numpy.array) into which users can type
> in strings that contain python expressions.
> Each expression is transformed into a function object in a second
> numpy.array of the same size, so that each function can be called by
> accessing the respective cell of the grid.
>
> eval seems to work quite fine and provides nice access to globals,
> system functions, modules, etc. Therefore, one can do general
> programming tasks within the grid without worrying about cell
> precedence.
>
> compile returns code objects instead of function objects. I can of
> course evaluate these code objects. However, when I store the code
> objects, it is an extra operation each time I want to call the
> function. So what is the benefit?
>
> More specific: Is there any benefit of calling:
>
> eval(compile(mystring, '', 'eval'))
>
> instead of
>
> eval(mystring)
>
> ?
>
> What are the drawbacks of my approach that I may be missing?
> Any suggestions?
>
> Best Regards
>
> Martin

Yes, there is.
Your original example can be rewritten

>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>> funclist = [compile('lambda x: %s' % func, '<string>', 'eval') for func in func_strings]
>>> len(funclist)
4
>>> len(set(funclist))
3
>>> eval(funclist[0])(1)
1

Ivan


From castironpi at gmail.com  Fri May 16 11:36:25 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:36:25 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
Message-ID: <8a536785-1d47-445d-b3f9-c40afe0934f0@b1g2000hsg.googlegroups.com>

On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
> ?? wrote:
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> The implementation of slots depends on that behaviour:
>
> http://docs.python.org/ref/slots.html
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> Can you expand on that?
>
> Peter

Yes I can.  But what is LSP?


From spoier at gmail.com  Tue May 20 15:56:17 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 12:56:17 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
Message-ID: <d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>

Great, thanks for the help (I'm fairly new to Python, didn't know
about ctypes)

    from ctypes import *
    libc = CDLL("libc.so.7")
    size = c_uint(0)
    libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
    buf = c_char_p(" " * size.value)
    libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

So now that I've got the data, can you point me towards docs
explaining how to layout struct ipstat?

Thanks,
Skye



From seberino at spawar.navy.mil  Tue May  6 00:32:36 2008
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: Mon, 5 May 2008 21:32:36 -0700 (PDT)
Subject: Bad form to access a *private variable* like _foo?
Message-ID: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>

Bad form to access a *private variable* like _foo?

The reason I'm asking is that TurboGears/SQLObject mobel objects have
an attribute called "_connection" that must be used to manually commit
database stuff....

e.g.  MyObject._connection.commit()

It bugs me.  I don't know if it is a stylistic faux pas or not.

Is it?

Chris


From aspersieman at gmail.com  Thu May  8 08:57:53 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:57:53 +0200
Subject: POP connection timeout.
In-Reply-To: <op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <4822F105.5050505@gmail.com>
	<op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <4822F8D1.7000803@gmail.com>

Gabriel Genellina wrote:
> Use socket.setdefaulttimeout(timeout_in_seconds) before you create the POP3 object; this value will be used by the initial connect. Once it is connected, you can set a different timeout for retrieving mail using pop.sock.settimeout(...)
> Note that setdefaulttimeout applies to ALL subsequent socket operations, not only using poplib.
> <http://docs.python.org/lib/socket-objects.html>
>
>   
Fantastic! This works thanks.

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From zer0dyer at verizon.net  Mon May 26 19:28:01 2008
From: zer0dyer at verizon.net (Curtis)
Date: Mon, 26 May 2008 23:28:01 GMT
Subject: php vs python
In-Reply-To: <7xwslnwa3s.fsf@ruckus.brouhaha.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com>
Message-ID: <5IH_j.3432$tF1.2671@trnddc01>

Paul Rubin wrote:
> notbob <notbob at nothome.com> writes:
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
> 
> php is very easy to get started with and some big sites have been
> written in it.  There is lots of low cost php hosting available.  It
> is not as good a language as Python.  However, Python's advantages are
> strongest in more complex projects.  For simple stuff, php is frankly
> less hassle just because of its wide deployment and that extensive
> function library that the blog post your quoted described as a bad
> thing.  Python's libraries are not bad, but php's are more intensely
> focused on web apps and includes what you need as part of the standard
> build.  With Python, if you want a database adapter or web template
> framework, you have to choose between a bunch of different ones and
> download and configure it which often involves head scratching when
> the auto-install stuff hits some quirk of your system.  With php, it's
> all right there when you flip the switch.
> 
> Knowing lots of languages is good for you.  php is probably your
> quickest route to getting a rudimentary web app running.  Python
> is a longer term project.  Do both.

PHP is more than capable for handling large projects, not just small 
scripting jobs. However, Paul's right about PHP being more driven 
toward web development, where as Python may be better for different 
types of apps.

Even then, I think your first reply was best, it just comes down to 
what you have more fun writing. Both languages are equally capable of 
getting the job done.

--
Curtis


From eckhardt at satorlaser.com  Mon May 26 06:20:36 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Mon, 26 May 2008 12:20:36 +0200
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
Message-ID: <rgfqg5-dg1.ln1@satorlaser.homedns.org>

Prisoner at War wrote:
> On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>>
>>
>> The differences aren't so fundamental or important: it's not an entirely
>> new language, just some ugly old things are being removed or changed in
>> incompatible ways (at *some* time it was supposed to happen - but could
>> not happen on the 2.x series which has to remain backwards compatible)
>> Also, Python 3.0 will be released simultaneously with 2.6, and there will
>> be other 2.x releases. Python 2 won't magically disappear from Earth, I
>> don't think Linux distros will come with Python 3.0 by default anytime
>> soon (perhaps not before 3.1).
> 
> But I'd read that Python 3 is very different in many important ways.

Yes, and that is the reason it is version 3.x instead of another 2.x. Moving
to version 3 signals that some changes were done that are _not_ backward
compatible and not even intended to.

> I read it right there on the Py3K site!  I can't make sense of how,
> why, even what, exactly, but that's not a misimpression on my part,
> I certain nonetheless...it's not just cosmetic changes but important
> ones pertaining to a sort of "linguistic logic" I gather....

Well, cosmetic or important is always in the eye of the beholder. I
personally would say that they are important cosmetic changes. You don't
get any new features or a more Touring-complete language suddenly, but it
will be much more consistent because it doesn't have to maintain wrong
decisions of the past, like making 'print' a separate statement when a
function would do.

>> So learning Python with a book targeted to 2.5 isn't a waste of time -
>> not at all.
> 
> Well, I will be learning Python from the excellent materials available
> online, to be sure, but a book that I spend money for, well, I have
> "higher standards" for it, you know, one of which is that it doesn't
> get superseded so soon!

As already pointed out, Python 2 will not suddenly cease to exist and
knowledge about it won't suddenly be worthless either. I guess it will take
a few years until the use of Python 3 supercedes that of Python 2.

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From bignose+hates-spam at benfinney.id.au  Thu May 15 06:02:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 20:02:43 +1000
Subject: Sanitised Newsgroup Feeds?
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <8763tfyjek.fsf@benfinney.id.au>

Paddy <paddy3118 at googlemail.com> writes:

> Does anyone do a sanitised newsgroup feed? Something like what mail
> filters do for email?

The feature you're looking for is called a "kill list" or "kill file":
add patterns to the kill file, and matching messages will be omitted
from your view of the newsgroup.

Whether your NNTP client supports such a feature is for you to
determine. (I'm pretty sure Google Groups, among its litany of
failings as an NNTP client, is lacking in this aspect too. So, don't
use Google Groups.)

> It is getting tedious wading through the ads for 'cracks' & watches;
> as well as the Xah cross-posted self-promotions, the wx-'its easier to
> post than read the tutorial' annoyances and the castiro (human/Eliza?)
> weirdnesses.

Yes, those authors are among the patterns in my GNUS kill file.

> I guess that many would want to add the same things to their kill
> file, but it takes me three clicks to add anyone/any thread to it
> and the c.l.p signal-to-noise is getting lower.

Huh? How often do you have to add patterns to the file? I do it once
every couple of weeks, if that.

-- 
 \     "Are you pondering what I'm pondering?" "I think so, Brain, but |
  `\    pants with horizontal stripes make me look chubby."  -- _Pinky |
_o__)                                                   and The Brain_ |
Ben Finney


From google at mrabarnett.plus.com  Tue May 13 18:14:49 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 13 May 2008 15:14:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <919416e2-590d-48ad-9d75-80a1a4c04732@b1g2000hsg.googlegroups.com>

On May 13, 6:32 pm, "D'Arcy J.M. Cain" <da... at druid.net> wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <misho... at gmail.com> wrote:
>
> > Not everybody has grown in English-speaking community, you know. And
> > knowing math quite good, I prefer writing "x = y" instead of "Set x to
> > y".
>
> OMG!  It's COBOL.
>
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  If that wasn't true then pseudocode would look a lot more
> like English than it does.  In fact, pseudocode tends to look a lot
> like Python.
>
I once had to do a bit of scripting in AppleScript. The problem I
found was that AppleScript tries to be so much like natural English
that I never got a clear idea of whether something would be valid!


From d.a.abernathy at gmail.com  Thu May 22 17:24:11 2008
From: d.a.abernathy at gmail.com (dj)
Date: Thu, 22 May 2008 14:24:11 -0700 (PDT)
Subject: Using os.walk to return files in subdirectories
Message-ID: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>

Hello All,

I am attempting to us os.walk to populate two lists with values from a
directory. The first list contains all the files in the directory and
subdirectories.
The second list contains only the files in the subdirectories.

Here is the code:

import os

# list of matching files
allfiles = [] #store all files found
subfiles = []  # subdir

for root,dir,files in os.walk("H:/python_experiments", f1):
     # this list has the files in all directories and subdirectories
     filelist = [ os.path.join(root,fi) for fi in files if
fi.endswith(".py") or fi.endswith(".txt") ]
     for f in filelist:
         allfiles.append(f)

     # split the root
     s= root.split(('\\') or ('\/'))
     print 's ',
     print s

     # assign the last value to end to come to values in dir
     end= s[-1]
     print 'end ',
     print end
     print '\n'

     # this list contains only the files in subdirectories
     for d in dir:
        if end == d:
         print 'subdir % s' % (end)
         sublist = [ os.path.join(root, fi) for fi in files if
fi.endswith(".py") or fi.endswith(".txt")]
         for f in sublist:
             subfiles.append(f)

for i in subfiles:
    print 'subfile', i


for i in allfiles:
    print "file ", i

The allfiles list is populated, but the subfiles list is not. Any
Suggetions ?


From zaka3enator at gmail.com  Mon May  5 10:43:49 2008
From: zaka3enator at gmail.com (Zaka)
Date: Mon, 5 May 2008 07:43:49 -0700 (PDT)
Subject: Pygame and PGU
Message-ID: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>

Hi. I need some help to make map system in PGU. For exmple we have 2
maps and when we leave first we enter to second.


--------------------
                   !


___________


From hdante at gmail.com  Fri May 16 13:24:13 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 10:24:13 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <1dbf604c-e49f-424d-ae06-1a9ec7f5cc0c@m73g2000hsh.googlegroups.com>

>
> yeah I don't know much about that, ?I was figuring perhaps I could limit the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows. ? also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.

 You're wrong.

 Maybe we could help you better if you told us what task are you
trying to achieve (or which algorithms do you think need optimization).


From ptmcg at austin.rr.com  Mon May 12 10:08:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 12 May 2008 07:08:39 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
Message-ID: <3c7eea22-e704-405c-a014-8ec7f38f8739@b64g2000hsa.googlegroups.com>

On May 12, 5:37?am, Iman <iman.dar... at gmail.com> wrote:
> is there any sample source code in python or links, docs to help me ?
> ?thanks for your attention .

I've used SimPy in the past to implement a factory simulation.  The
SimPy web site claims that it has been used for traffic simulation,
but does not give any links.

    http://simpy.sourceforge.net/index.html

I found it to be a very neat discrete event simulator, making good use
of Python language features (especially generators).

HTH,
-- Paul


From sjmachin at lexicon.net  Thu May 15 12:33:21 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:33:21 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <659df7b5-6dde-48f7-bf2f-cb7a0f8a84bc@w5g2000prd.googlegroups.com>

On May 16, 2:12 am, globalrev <skanem... at yahoo.se> wrote:
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')

Two different paths again.

> d.readline()

This reads one line and then does absolutely nothing with it. The
Python interactive shell prints the result of each expression, which
is a Good Thing. For Python to do the same when running a script would
be a Bad Thing.

readline and readlines are old hat; instead, iterate over the file
object, like this:

for line in d:
    print line,

>
> returns true in the shell but prints no text even though the document
> contains text.
>
> d.name returns nothing, d.name() raises an error.

d.name should return the name of the file; I suspect that you again
have done nothing with it. d.name() would raise an exception because
d.name is not a method, so you can't call it.

HTH,
John


From lists at cheimes.de  Thu May 22 07:58:27 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 22 May 2008 13:58:27 +0200
Subject: How do I know when all threads are done?
In-Reply-To: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
References: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
Message-ID: <g13n54$m80$1@ger.gmane.org>

Zerge schrieb:
> I can launch threads just fine, but then I have to do a time.sleep(n)
> so the main thread from which they where launched will wait for all
> the threads to return.
> 
> How can I detect when all threads are done and then return control to
> the main threads?

import threading

threads = []

threads.append(threading.Thread(...))
threads.append(threading.Thread(...))
threads.append(threading.Thread(...))

for thread in threads:
    thread.start()

# now all threads are running, some might already be done

for thread in threads:
    thread.join()

# here all threads are done

Christian



From certo at comeno.it  Mon May 26 13:10:46 2008
From: certo at comeno.it (imho)
Date: Mon, 26 May 2008 17:10:46 GMT
Subject: About Michele Simionato's "classinitializer" decorator
Message-ID: <qaC_j.85793$FR.319565@twister1.libero.it>

Hi all.
I just send this post as a comment to the third part of Michele 
Simionato's article about metaprogramming techniques at:

http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT=105AGX03&S_CMP=ART


I found extremely useful the classinitializer "trick". I was thinking 
over the caveat not to call a class initializer after the _metaclass_ 
hook (an exception being raised in that case).
Am I wrong if I state there's a plain solution to this ? I modified the 
lines involving "type", replacing it with a custom meta type returned by 
a call to frame.f_locals.get("__metaclass__", type), in such a way the 
creation of the class involves the right metaclas, even if it was 
defined  just before the initializer function:

def classinitializer(proc):
     # basic idea stolen from zope.interface.advice, P.J. Eby
     def newproc(*args, **kw):
        frame = sys._getframe(1)
        if '__module__' in frame.f_locals and not \
            '__module__' in frame.f_code.co_varnames: # we are in a class
            thetype = frame.f_locals.get("__metaclass__", type)
            def makecls(name, bases, dic):
                try:
                    cls = thetype(name, bases, dic)
                except TypeError, e:
                    if "can't have only classic bases" in str(e):
                        cls = thetype(name, bases + (object,), dic)
                    else:  # other strange errs, e.g. __slots__ conflicts
                        raise
                proc(cls, *args, **kw)
                return cls
            frame.f_locals["__metaclass__"] = makecls
        else:
            proc(*args, **kw)
     newproc.__name__ = proc.__name__
     newproc.__module__ = proc.__module__
     newproc.__doc__ = proc.__doc__
     newproc.__dict__ = proc.__dict__
     return newproc

This makes the trick work even if a metaclass or another 
classinitializer was defined first:

@classinitializer
def enhance(cls, **kw):
     for k, v in kw.iteritems():
         setattr(cls, k, v)

class M(type):
     pass

class A:
     __metaclass__ = M
     enhance(x=100)
     enhance(y=200)


 >>> A.x
100
 >>> A.y
200
 >>> type(A)
<class '__main__.M'>

What do you think about this solution ?

Diego Novella.


From renesd at gmail.com  Thu May  1 17:37:18 2008
From: renesd at gmail.com (illume)
Date: Thu, 1 May 2008 14:37:18 -0700 (PDT)
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C libraries 
	on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com> 
	<mailman.405.1209643816.12834.python-list@python.org>
Message-ID: <372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>

Ah, why is that?

There's still at least 1.1% of people using win98, if you believe this
source of stats:
http://www.w3schools.com/browsers/browsers_os.asp

I just noticed that win9x winme and win nt are all being dropped from
python.

I know they are old and crufty, but there's still heaps of people
using them.

Someone pointed me to the pep, where the un-support seems planned:
http://www.python.org/dev/peps/pep-0011/


Seems like a lot of people using it, so it's still worthwhile making
2.6 work with win98.





On May 1, 10:09?pm, Christian Heimes <li... at cheimes.de> wrote:
> illume schrieb:
>
> > Hi,
>
> > after a little research it appears that win9x is not supported by the
> > msvcr90.dll run time.
>
> > Can you confirm thisLenard?
>
> > Has anyone tested the new python binaries that link to msvcr90.dll on
> > win9x machines?
>
> It doesn't matter to use because Python 2.6 and 3.0 require at least
> Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.
>
> Christian



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Subject: paypal   wholesale, bape,
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Message-ID: <0f62fdf1-2748-4790-863b-09c8ec471c79@k10g2000prm.googlegroups.com>

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From tjreedy at udel.edu  Tue May 27 02:04:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 02:04:48 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com><a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org><039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com><mailman.1629.1211844239.12834.python-list@python.org>
	<03655ec7-2136-4cea-9575-34e321356439@p25g2000pri.googlegroups.com>
Message-ID: <g1g89v$70j$1@ger.gmane.org>


"Russ P." <Russ.Paielli at gmail.com> wrote in message 
news:03655ec7-2136-4cea-9575-34e321356439 at p25g2000pri.googlegroups.com...
| Hmmm... that seems a bit strange. Why should "_variable" be visible
| when you use "import module"

Because you only add one name to the current namespace -- bound to a 
module --  and there is no reason to exclude attributes of that object.

|but not when you use "from module import *"?

Because you are already adding m names and adding n more names may cause 
problems -- which is what lead to the addition of the __all__ mechanism 
some years back.  Sorry, I forget the details because they don't concern 
me.

| > That last form should not be used normally, except when playing with 
the
| > interactive interpreter.
|
| OK, I have a confession to make. I use "from module import *" almost
| exclusively. But then, I'm different from most folks. I can drink six
| beers and still drive safely, for example. The key is to drive faster
| so I can get past dangerous situations quicker.





From gandalf at shopzeus.com  Tue May 27 11:34:24 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 27 May 2008 17:34:24 +0200
Subject: datetime.stdptime help
Message-ID: <483C2A00.2060507@shopzeus.com>

            def str2datetime(s):
                #28 May 2008 12:38:16 BDT
                return time.strptime(s,"%d %b %Y %H:%M:%S %Z")

            #.... some code here....
            print repr(pd)
            print str2datetime(pd)


Result:

'24 May 2008 12:38:16 BDT'
Traceback (most recent call last):
  File "__init__.py", line 40, in <module>
    print ssc.get_order_data('202-9810306-3236320')
  File 
"/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py", 
line 306, in get_order_data
    print str2datetime(pd)
  File 
"/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py", 
line 299, in str2datetime
    return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
  File "/usr/local/lib/python2.5/_strptime.py", line 331, in strptime
    (data_string, format))
ValueError: time data did not match format:  data=24 May 2008 12:38:16 
BDT  fmt=%d %b %Y %H:%M:%S %Z

I think that the format is correct. What am I doing wrong?

Thanks,

   Laszlo



From aahz at pythoncraft.com  Tue May  6 16:00:43 2008
From: aahz at pythoncraft.com (Aahz)
Date: 6 May 2008 13:00:43 -0700
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <fvqddb$t6l$1@panix3.panix.com>

In article <mailman.642.1210067048.12834.python-list at python.org>,
Max M  <maxm at mxm.dk> wrote:
>
>Well I just thought I would mention that it is not dead. Merely middle aged.

"'E's just resting!"
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From ptmcg at austin.rr.com  Sat May 24 09:52:57 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:52:57 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<43381ce3-3505-482e-82ac-0643eb57e25b@k37g2000hsf.googlegroups.com>
Message-ID: <73b0bf97-0a77-41f4-acc4-b8cad9f08d77@2g2000hsn.googlegroups.com>

This version is a bit better, since it follows the convention that
'<<' should return self.

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return self

    def __bool__(self):
        return bool(self.value)
    __nonzero__ = __bool__

-- Paul


From sjmachin at lexicon.net  Thu May 15 12:16:42 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:16:42 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <903bad80-e562-4df1-96aa-8e1015d725ca@p25g2000pri.googlegroups.com>

On May 16, 2:03 am, globalrev <skanem... at yahoo.se> wrote:
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
>
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()
>
> exists returns false but when i open it doesnt complain. how come?
>
> another file that exists returned false for complained when i tried to
> open it.

Ummm ... you are testing one path with os.path.exists and then opening
a *DIFFERENT* path. If you think you still have a problem, show us a
short piece of code that you actually executed and that demonstrates
the problem.


From eliben at gmail.com  Sat May 17 05:42:17 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 02:42:17 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
Message-ID: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>

Hello,

I'm getting into Python now after years of Perl, and as part of my
research I must understand how to do some common tasks I need.

I have a bunch of Windows PCs at work to which I want to distribute an
application I've developed on my PC. All these PCs have Python 2.5
installed.

If my application contains only code I've developed, I simply zip its
directory with .py files and send it to everyone, who can then use it
by running the entry-point .py file. However, what if I've installed
some 3rd party modules on my PC, and my application uses them (for
example pyparsing, PiYAML and some others) ? I don't want to manually
install all these packages (there may be dozens of them) on all those
PCs (there may be dozens of those too). What is the best method I can
use ? Naturally, I want all the non-standard packages my app uses to
be detected automatically and collected into some kind of convenient
distributable that is easy to pass around and run.

I'm aware of py2exe - tried it and it works fine. But it creates huge
executables, and I don't want to distribute those all the time. I much
prefer a zipped directory of .py scripts that takes some 10s of KBs.

Thanks in advance,
Eli


From dkcombs at panix.com  Thu May 29 20:56:37 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 00:56:37 +0000 (UTC)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <g1njc5$p1i$1@reader2.panix.com>

In article <rem-2008may08-005 at yahoo.com>,
Robert Maas, http://tinyurl.com/uh3t <usenet1.3.CalRobert at SpamGourmet.Com> wrote:
>> From: "xah... at gmail.com" <xah... at gmail.com>
>> the importance of naming of functions.
>

Lisp is *so* early a language (1960?), preceeded mainly only by Fortran (1957?)?,
and for sure the far-and-away the first as a platform for *so many* concepts
of computer-science, eg lexical vs dynamic ("special") variables, passing
*unnamed* functions as args (could Algol 60 also do something like that,
via something it maybe termed a "thunk"), maybe is still the only one
in which program and data have the same representation -- that it'd 
seem logical to use it's terminology in all languages.

>From C is the very nice distinction between "formal" and "actual" args.

And from algol-60, own and local -- own sure beats "static"!

And so on.


To me, it's too bad that that hacker-supreme (and certified genius)
Larry W. likes to make up his own terminology for Perl.  Sure makes
for a lot of otherwise-unnecessary pages in the various Perl texts,
as well as posts here.

Of course, a whole lot better his terminology than no language at all!


David




From fc14301589 at icqmail.com  Sat May 24 02:49:32 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sat, 24 May 2008 14:49:32 +0800
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <4837ba88_1@news.tm.net.my>

On 06:59, sabato 24 maggio 2008 Johannes Bauer wrote:

> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

If you want speak a language that isn't understood mostly you'll face
unexpected risults.
When you got started with C/C++, were you writing plain english to do
programs?
Far away to be a flame, each language have its own grammar that some time it
will need to be learnt.
Therefore, even myself still bad to write english, since my mind thinking
italian sentences.



From skanemupp at yahoo.se  Mon May  5 08:03:39 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 05:03:39 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
Message-ID: <5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>

On 5 Maj, 13:47, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev wrote:
> >http://www.pygame.org/docs/ref/mixer.html
>
> > import pygame
>
> > #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> > buffer=3072)  //it complained abiout words=
> > so i guess its only the nbrs should be there//
>
> > pygame.mixer.init(22050, -16, 2, 3072)
> > pygame.mixer.music.load("example1.mp3")
> > pygame.mixer.music.play(loops=1, start=0.0)
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> > <module>
> >     pygame.mixer.music.load("example1.mp3")
> > error: Couldn't read from 'example1.mp3'
>
> Give it the full path to the MP3. Be aware of backward slashes + the need to
> escape them.
>
> Diez

escape them?




import pygame

#pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=3072)
pygame.mixer.init(22050, -16, 2, 3072)
pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
example1.mp3')
pygame.mixer.music.play(loops=1, start=0.0)

Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
<module>
    pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
example1.mp3')
error: Couldn't read from 'C:/Python25/myPrograms/pygameProgs/
example1.mp3'


From arnodel at googlemail.com  Thu May 15 11:53:38 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 16:53:38 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
	<482c428c$0$9669$426a34cc@news.free.fr>
Message-ID: <m2bq37a7i5.fsf@googlemail.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> FWIW, I wonder why the BDFL choosed to implement __new__ as a
> staticmethod - there are probably some pretty good reasons, but not
> knowing them, it looks like __new__ would have been a perfect
> candidate for a classmethod.
>
> So far, the only reason I can think of is that making it a classmethod
> would have required the use of super(Parent, cls) to call the parent's
> class __new__, which may (or may not - never had the case) be
> problematic (any guru on this ?)

Don't know but I remember something about this in 'Unifying types and
classes'.  There it is:

    Factoid: __new__ is a static method, not a class method. I
    initially thought it would have to be a class method, and that's
    why I added the classmethod primitive. Unfortunately, with class
    methods, upcalls don't work right in this case, so I had to make
    it a static method with an explicit class as its first
    argument. Ironically, there are now no known uses for class
    methods in the Python distribution (other than in the test
    suite). I might even get rid of classmethod in a future release if
    no good use for it can be found!

(http://www.python.org/download/releases/2.2/descrintro/)

I don't have the time to try to figure it out :(

-- 
Arnaud


From michele.simionato at gmail.com  Mon May 26 13:50:23 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 26 May 2008 10:50:23 -0700 (PDT)
Subject: About Michele Simionato's "classinitializer" decorator
References: <qaC_j.85793$FR.319565@twister1.libero.it>
Message-ID: <5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>

On May 26, 7:10 pm, imho <ce... at comeno.it> wrote:
> Hi all.
> I just send this post as a comment to the third part of Michele
> Simionato's article about metaprogramming techniques at:
>
> http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT...
>
> I found extremely useful the classinitializer "trick".

I never use it. Too clever. I am waiting for class decorators
in Python 2.6.

> I was thinking
> over the caveat not to call a class initializer after the _metaclass_
> hook (an exception being raised in that case).
> Am I wrong if I state there's a plain solution to this ?

I think your solution is fine. Still, consider waiting for
class decorators ;)

       Michele Simionato



From jurgenex at hotmail.com  Sat May 31 12:48:11 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Sat, 31 May 2008 16:48:11 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
Message-ID: <kjv2441a9im6bcistqcav6c87j4024s2pj@4ax.com>

"szr" <szrRE at szromanMO.comVE> wrote:
>I would rather have the OP comment about that, as he started the thread. 

The OP is a very well-known troll who has the habit of spitting out a
borderline OT article to a bunch of loosly related NGs ever so often and
then sits back and enjoys the complaints and counter-complaints of the
regulars. He doesn't provide anything useful in any of the groups he
targets (at least AFAIK) and he doesn't participate in the resulting
mayhem himself, either. 
He will only go away if everyone just ignores him.

With this in mind another reminder:

         +-------------------+             .:\:\:/:/:.
         |   PLEASE DO NOT   |            :.:\:\:/:/:.:
         |  FEED THE TROLLS  |           :=.' -   - '.=:
         |                   |           '=(\ 9   9 /)='
         |   Thank you,      |              (  (_)  )
         |       Management  |              /`-vvv-'\
         +-------------------+             /         \
                 |  |        @@@          / /|,,,,,|\ \
                 |  |        @@@         /_//  /^\  \\_\
   @x@@x@        |  |         |/         WW(  (   )  )WW
   \||||/        |  |        \|           __\,,\ /,,/__
    \||/         |  |         |      jgs (______Y______)
/\/\/\/\/\/\/\/\//\/\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
==============================================================

Follow-up adjusted.

jue


From zerty.david at gmail.com  Sat May  3 18:37:23 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sat, 3 May 2008 19:37:23 -0300
Subject: Problems with psycopg2
In-Reply-To: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
References: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
Message-ID: <5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>

The thing is this query works fine on the console through psql, but not in
my code? can anyone explain me why?

On Thu, May 1, 2008 at 9:31 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Hi all
> I have this function:
> def checkName(self, name):
>         cur = self.conn.cursor()
>
>         sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
>         cur.execute(sql)
>         rows = cur.fetchall()
>
>         if rows == "[]":
>             self.insert()
>
> It seems to work fine, But I'm getting this exception:
> psycopg2.ProgrammingError: current transaction is aborted, commands
> ignored until end of transaction block
> at: cur.execute(sql)
>
> What's the problem?
> thx
>
> ps: fn_pat is the column of the db, name is the string passed in the
> function parameter
>
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From prudek at bvx.cz  Sat May 24 17:59:27 2008
From: prudek at bvx.cz (Milos Prudek)
Date: Sat, 24 May 2008 23:59:27 +0200
Subject: module import problem
Message-ID: <200805242359.27995.prudek@bvx.cz>

I have a Kubuntu upgrade script that fails to run:

File "/tmp/kde-root//DistUpgradeFetcherCore.py", 
line 34, in <module>
import GnuPGInterface
ImportError
No module named GnuPGInterface

I got a folder /usr/share/python-support/python-gnupginterface with 
a "GnuPGInterface.py" but no __init__.py.

In python command line, print sys.path shows that /usr/share/python-support/ 
is not among python paths.

If I cd into /usr/share/python-support/python-gnupginterface and launch Python 
I can "import GnuPGInterface". But when I run DistUpgradeFetcherCore.py in 
that folder it always fails with No module named GnuPGInterface.

 I do not know much about setting python path. 

-- 
Milos Prudek


From terry6394 at gmail.com  Wed May 28 12:01:40 2008
From: terry6394 at gmail.com (Cyril.Liu)
Date: Thu, 29 May 2008 00:01:40 +0800
Subject: =?GB2312?B?x+u9zCy52NPaUHl0aG9uttS24LSmwO3G97XE1qez1qOsUHl0aA==?=
	=?GB2312?B?b27U2kFJWM/CtatDUFW1xNCnwsqxyLbgQ1BVtcTQp8LKuN8/?=
Message-ID: <6d2d06b10805280901k1aa7db70g4aa8ba3c622a8db0@mail.gmail.com>

??????????????????????C +
Python????????????????????????C????????????????????????????????????????????????????????????????Python??????????Python??????????????????????????Python??????
AIX????????????????????????????????????????????????????????????????????????GIL????????????????Python????????????????????Python??????lib??????????????????????????????????????DB2,
??????????????????????C??????????DB API??
??????????????????????????????????????????????????????????????????????????????????????????????????????????????
????????????Python????????????????????????????????????C??????????????????????????????????????????????????????????????!

Python?????? 2.4
????: AIX 5.3
DB: DB2 8.2
-- 
About Cyril.Liu
-----------------------------------
Cyril
????????????,
??????????????,
??????????????:"????????????????????????"
http://blog.405studio.cn/
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From exarkun at divmod.com  Tue May 13 20:59:28 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 20:59:28 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <20080514005603.6859.2106502900.divmod.quotient.63149@ohm>
Message-ID: <20080514005928.6859.2036301568.divmod.quotient.63150@ohm>

On Tue, 13 May 2008 20:56:03 -0400, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>On Tue, 13 May 2008 16:44:11 -0700 (PDT), Giampaolo Rodola' 
><gnewsg at gmail.com> wrote:
>>
>>[snip]
>>>
>>>To support scheduling calls, you just have to know when the next call is
>>>going to happen.  Then, you can wake up at exactly that time.  This is
>>>what Twisted does, even for select reactor. ;)
>>
>>Yes but how do you know when it's the time to fire up a call without
>>using a thread?
>>You are forced to call time.time() periodically and check if that time
>>had come every time.
>>Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
>>That's where that should happen.
>
>Why?  Isn't this why subtraction exists?  If there is a call scheduled to
>happen at T1 and the current time is T2, then I know that after (T1 - T2)
>elapses, it will be time to run the call.  Why do I have to do any checks
>at all?  I just tell select() to wait that long.  Presumably this is just
>what someone will do if they want to use asyncore with timed calls.  Call
>asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

Ah, of course this is wrong, since asyncore.loop... loops. :P  I meant to
say asyncore.poll() here.

>So, actually, I'm not sure what the disagreement is about. ;)  The
>default value for the timeout parameter to the loop function seems
>somewhat irrelevant.  If someone wants timed events in their loop,
>asyncore isn't standing in their way.  On the other hand, I didn't
>this thread (or maybe just this part of the thread) start out with
>a question about asyncore throughput?  I have no idea what that
>might have to do with this.
>
>Jean-Paul


From lists at svrinformatica.it  Fri May 23 03:20:45 2008
From: lists at svrinformatica.it (Mailing List SVR)
Date: Fri, 23 May 2008 09:20:45 +0200
Subject: Python treeview and recursion: help needed
Message-ID: <1211527245.7401.3.camel@localhost.localdomain>

?Hi, 

I have a database with the following structure:

id    name  sublevel

for example

1     Node1     None
2     Node2     1
3     Node3     2
4     Node4     None
5     Node5     1
6     Node6     5
....
....


where Node1 and Node4 are treeview's master nodes, Node2 is a subnode of
Node1, Node3 is a subnode of Node2, Node5 is a subnode of Node1 and
Node6 a subnode of Node5 and so on

I need a recursive function to populate treeview and I'm stuck on this
function :confused:

I need a list where I have the master node with child node inside and if
a child node as others child nodes, I need thess nodes inside the child
nodes.

Something like this:

[
{"id":1,"name":"Node1","Childs":[{"id:2","name":"Node2","Childs":[{"id":3,"name":"Node3","Childs":[]}]},
{"id":5,
"name":"Node5","Childs":[{"id":6,"name":"Node6","Childs":[]}]}]},{"id":4,"name":"Node4","Childs":[]}  
]

I'm using django so I access the data as 

all=Data.objects.all()

and I can do something like

for a in all:
  print a.id
  print a.name
  
to get database value.

Any help is appreciated,

thanks,
Nicola



From pscott at uwc.ac.za  Mon May  5 10:28:33 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:28:33 +0200
Subject: Nested os.path.join()'s
In-Reply-To: <1209997313.7106.29.camel@paul-laptop>
References: <1209997313.7106.29.camel@paul-laptop>
Message-ID: <1209997713.7106.32.camel@paul-laptop>


On Mon, 2008-05-05 at 16:21 +0200, Paul Scott wrote:
> example:
> 
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah
> 

Sorry, pasted the wrong example...

Better example:

 pics =  glob.glob(os.path.join(os.path.join(basedir,picdir),'*'))


> Question is, is there a better way of doing this? The above *works* but
> it looks kinda hackish...

--Paul

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All Email originating from UWC is covered by disclaimer 
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From pavlovevidence at gmail.com  Sat May 17 02:09:51 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 23:09:51 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <95854850-a48a-4ce9-a55e-5820d0651925@b64g2000hsa.googlegroups.com>

On May 16, 4:46 am, "??" <littlesweetme... at gmail.com> wrote:
> Howdy,
>     I wonder why below does not work.
>
> a = object()
> a.b = 1        # dynamic bind attribute failed...
>
> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK
>
> Does this strange behavior break the LSP (Liskov substitution principle)?


I suspect it's possible to come up with a property that causes LSP to
be violated for any two given distinct classes.

For example, if the property you're considering is "Raises an
exception when you try to access an attribute", then yes, the subtype
cannot be substituted for the base type and would violate LSP.
However, that's not really such a useful property in most cases.

The reason instances of object don't have dynamic attributes is
because dyanmic attributes are internally represented by a dict
object.  To keep memory footprint low, instances of many built-in
types don't have an associated dict and so can't bind attributes
dynamically.  Instances of object can't have an associated dict
because, if they did, it would mean all objects would have to have an
associated dict, because all types are subclasses of object.

Because of this, direct instances of object really don't have much use
in Python.  It's one main use case is as a sentinel or marker of some
sort.  It's only useful property is that it is itself, and nothing
else.  But, that property is true of all instances in Python;
therefore any instance may be substituted for an object instances,
therefore it satisfies LSP.

(Phew: what a tangle of nomenclature that was.)


Carl Banks


From skunkwerk at gmail.com  Fri May  9 11:40:38 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Fri, 9 May 2008 08:40:38 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
Message-ID: <7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>

On May 9, 12:12?am, John Nagle <na... at animats.com> wrote:
> skunkwerk wrote:
> > i'm getting the wrong output for the 'title' attributes for this
> > data. ?the queue holds a data structure (item name, position, and list
> > to store results in). ?each thread takes in an item name and queries a
> > database for various attributes. ?from the debug statements the item
> > names are being retrieved correctly, but the attributes returned are
> > those of other items in the queue - not its own item. ?however, the
> > model variable is not a global variable... so i'm not sure what's
> > wrong.
>
> > i've declared a bunch of workerthreads(100) and a queue into which
> > new requests are inserted, like so:
>
> > queue = Queue.Queue(0)
> > ?WORKERS=100
> > for i in range(WORKERS):
> > ? ?thread = SDBThread(queue)
> > ? ?thread.setDaemon(True)
> > ? ?thread.start()
>
> > the thread:
>
> > class SimpleDBThread ( threading.Thread ):
> > ? ?def __init__ ( self, queue ):
> > ? ? ? ? ? ?self.__queue = queue
> > ? ? ? ? ? ?threading.Thread.__init__ ( self )
> > ? ?def run ( self ):
> > ? ? ? ? ? ?while 1:
> > ? ? ? ? ? ? ? ? ? ?item = self.__queue.get()
> > ? ? ? ? ? ? ? ? ? ?if item!=None:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?model = domain.get_item(item[0])
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug('sdbthread item:'+item[0])
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?title = model['title']
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?scraped = model['scraped']
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug("sdbthread title:"+title)
>
> > any suggestions?
> > thanks
>
> ? ?Hm. ?We don't have enough code here to see what's wrong.
> For one thing, we're not seeing how items get put on the queue. ?The
> trouble might be at the "put" end.
>
> ? ?Make sure that "model", "item", "title", and "scraped" are not globals.
> Remember, any assignment to them in a global context makes them a global.
>
> ? ?You should never get "None" from the queue unless you put a "None"
> on the queue. ?"get()" blocks until there's work to do.
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? John Nagle

thanks John, Gabriel,
  here's the 'put' side of the requests:

def prepSDBSearch(results):
	modelList = [0]
	counter=1
	for result in results:
		data = [result.item, counter, modelList]
		queue.put(data)
		counter+=1
	while modelList[0] < len(results):
		print 'waiting...'#wait for them to come home
	modelList.pop(0)#now remove '0'
	return modelList

responses to your follow ups:
1)  'item' in the threads is a list that corresponds to the 'data'
list in the above function.  it's not global, and the initial values
seem ok, but i'm not sure if every time i pass in data to the queue it
passes in the same memory address or declares a new 'data' list (which
I guess is what I want)
2)  john, i don't think any of the variables you mentioned are
global.  the 'none' check was just for extra safety.
3)  the first item in the modelList is a counter that keeps track of
the number of threads for this call that have completed - is there any
better way of doing this?

thanks again


From bignose+hates-spam at benfinney.id.au  Sun May 11 23:41:25 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 13:41:25 +1000
Subject: Convention for name indicating "don't care about the value" (was: Is
	using range() in for loops really Pythonic?)
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <8763tk89zu.fsf_-_@benfinney.id.au>

Carl Banks <pavlovevidence at gmail.com> writes:

> On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > In such cases, the name 'dummy' is conventionally bound to the items
> > from the iterator, for clarity of purpose::
> >
> >     for dummy in range(10):
> >         # do stuff that makes no reference to 'dummy'
> 
> Is this documented?

It's not a documented standard, to my knowledge.

> I've never heard of this convention. It's not PEP 8, and I've never
> seen consistent usage of any name. I'd be interested in knowing
> where you read that this was a convention, or in what subcommunities
> it's a convention in.

It has been in this forum that the use of the name '_' for "don't care
about the value" was deprecated, since that name is already overloaded
with other meanings.

> I think dummy is a terrible name to use for this, since in no other
> usage I can think of does the word "dummy" suggest something isn't
> used.

I think it's far superior to '_'. I'd be just as happy with any other
name that explicitly distinguishes itself for this purpose.

> If a value isn't used, then I think the most clear name for it is
> "unused".

Sounds good to me. Now we merely need to convince the world.

-- 
 \      ?Software patents provide one more means of controlling access |
  `\      to information. They are the tool of choice for the internet |
_o__)                                     highwayman.? ?Anthony Taylor |
Ben Finney


From yves at zioup.com  Fri May  9 00:47:49 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 04:47:49 GMT
Subject: python newbie: some surprises
In-Reply-To: <64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
Message-ID: <VHQUj.124646$Cj7.90968@pd7urf2no>

Mensanator wrote:
>> 2. python requires to pass "self" to all instance methods
> 
> Who uses methods?

Is this a joke ?
What are the alternatives ?


> 
>> and I missed ":" often. :)
> 
> Try using something like Seed7, where you have to use "then" with
> "if" and "do" with "while" and "end" in every block. Maybe you'll
> come to appreciate significant whitespace and ":".

I see the point of the OP. Couldn't the new-line be used as an equivalent of 
  ':', for example, do you find this difficult to read:

if a == 3
   do_something()


if a == 3: do_something()


And surely, it should be easy to parse by the compiler.

Yves.
http://www.SollerS.ca


From kirby.urner at gmail.com  Mon May 12 23:36:53 2008
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: Mon, 12 May 2008 20:36:53 -0700 (PDT)
Subject: Chinese names in Python source
Message-ID: <72f078a8-a9e3-4b1c-8f21-ea5633654672@b5g2000pri.googlegroups.com>


It's probably not news to anyone here that Python 3 gives us
access to the unicode codespace for Python names, not just
string literals, meaning our functions and classes, lists and
dictionaries, might go outside Latin-1 for their source code
representation.

I have an example in my blog:
http://mybizmo.blogspot.com/2008/05/chinese-names-in-python.html

If others have Python source with names in other languages,
that might be fun to see.  Images are probably better than actual
source code, as it's up to the font library to render unicode
properly and many Python text editors aren't prepared to render
all these characters (yet).

I used lucidabright in IDLE for my screen shot (Ubuntu 8.4 laptop).

Kirby
Portland, OR


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 11:23:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 17:23:15 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <48343e56$0$5866$426a74cc@news.free.fr>

Dave Parker a ?crit :
>> Or just:
>>
>> If command is "quit" ...
> 
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
> 
>      Read data from "input.txt".
>      If data is an error then go to ...

Arf ! A goto !

> Or when assigning a type to an identifier:
> 
>      HarmonicMean is a function(x, y) ...
>      LoopCount is a variable ...
> 
> By using = only for equality and "is" only for types, the Flaming
> Thunder compiler can detect when either is being used incorrectly
> because the syntax for the two is incompatible.  That avoids the man-
> years of wasted debugging time spent on languages that accept
> statements that are easily confused, yet syntactically valid (e.g. the
> confusion between = and == in C if-statments, or the confusion between
> = (equality) and "is" (identity) in Python).
> 

Actually in Python the equality test is '==', not '='. And since 
Python's types are objects - which is *definitively* a GoodThing(tm) in 
an OOPL -, your point here is moot.

Also, you're overloading the meaning of 'is', which *is* (pun intented) 
confusing too.


From p5secr2 at uni-jena.de  Mon May 19 10:43:47 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:43:47 +0200
Subject: scope of optional arguments
References: <g0s2v3$fa6$01$1@news.t-online.com>
Message-ID: <g0s3ne$mb6$03$1@news.t-online.com>

Whoops, I meant to call

print walk([1,2,3], [])
print walk([4,5,6])

and

print walk([1,2,3])
print walk([4,5,6])

with

def walk(seq, result = []):
  for item in seq:
    result.append(item)
  return result

The question is still the same: Why do both calls give different results?

Thank you very much for reading, I'm sorry for the inconvenience. 




From metallourlante at gmail.com  Sun May 18 16:06:10 2008
From: metallourlante at gmail.com (Alex)
Date: Sun, 18 May 2008 13:06:10 -0700 (PDT)
Subject: is there a bug in urlunparse/urlunsplit
Message-ID: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>

Hi all.

Is there a bug in the urlunparse/urlunsplit functions?
Look at this fragment (I know is quite silly):

urlunparse(urlparse('www.example.org','http'))
---> 'http:///www.example.org'
           ^^^^^

There are too many slashes, isn't it? Is it a known bug or maybe I
missed something...

Alex



From __peter__ at web.de  Thu May 15 03:06:19 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 15 May 2008 09:06:19 +0200
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
Message-ID: <g0gndb$3vt$03$1@news.t-online.com>

George Sakkis wrote:

> I spent several hours debugging some bogus data results that turned
> out to be caused by the fact that heapq.nlargest doesn't respect rich
> comparisons:
> 
>     import heapq
>     import random
> 
>     class X(object):
>         def __init__(self, x): self.x=x
>         def __repr__(self): return 'X(%s)' % self.x
>         if True:
>             # this succeeds
>             def __cmp__(self, other): return cmp(self.x , other.x)
>         else:
>             # this fails
>             def __lt__(self, other): return self.x < other.x
> 
>     s = [X(i) for i in range(10)]
>     random.shuffle(s)
> 
>     s1 = heapq.nlargest(5, s)
>     s2 = sorted(s, reverse=True)[:5]
>     assert s1 == s2, (s,s1,s2)
> 
>     s1 = heapq.nsmallest(5, s)
>     s2 = sorted(s)[:5]
>     assert s1 == s2, (s,s1,s2)
> 
> 
> According to the docs, nlargest is equivalent to: "sorted(iterable,
> key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> be at least a documentation bug, if not an implementation one.

Implementing a subset of the rich comparisons is always dangerous. According
to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
work:

import heapq
import random

used_rich = set()

class X(object):
    def __init__(self, x): self.x=x
    def __repr__(self): return 'X(%s)' % self.x
    def __lt__(self, other):
        used_rich.add("lt")
        return self.x < other.x
    def __eq__(self, other): 
        used_rich.add("eq")
        return self.x == other.x
    def __gt__(self, other):
        used_rich.add("gt")
        return self.x > other.x
    def __ge__(self, other):
        used_rich.add("ge")
        return self.x >= other.x
    def __ne__(self, other):
        used_rich.add("ne")
        return self.x != other.x
    def __le__(self, other):
        used_rich.add("le")
        return self.x <= other.x

s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]

smallest = sorted(s)[:5]
largest = sorted(s, reverse=True)[:5]

print "used by sorted:", used_rich
used_rich = set()

for i in range(10000):

    s1 = heapq.nlargest(5, s)
    assert s1 == largest, (s, s1, largest)

    s1 = heapq.nsmallest(5, s)
    assert s1 == smallest, (s, s1, smallest)

    random.shuffle(s)

print "used by nlargest/nsmallest:", used_rich

Output:
used by sorted: set(['lt'])
used by nlargest/nsmallest: set(['lt', 'le', 'eq'])

Peter


From inhahe at gmail.com  Wed May 21 12:50:37 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 12:50:37 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
	<FJXYj.78134$%15.20121@bignews7.bellsouth.net>
Message-ID: <KoYYj.52545$3v1.22082@bignews3.bellsouth.net>

>>
>> One thing I hate from C is the assignment in expressions...Forcing
>> myself to write
>> 0 == Something
>> rather than
>> Something == 0
>
> interesting trick, i've never thought of that/seen it
> although if Python implemented it I think it should default to giving 
> warnings when you use = in an expression, that way you don't have to 
> worry.
>

That introduces complications though, do you want to see a pagefull of 
warnings every time you import a module that uses the ='s?
You could specify in your python file that you want to suppress that 
warning, but then you'd never know when you used = by accident when you 
meant to use ==.
anyway i was thinking you could have a second assignment operator to use 
just in expressions, and only allow that.  it could be := since some 
languages tend to use that. i wouldn't like it as a general assignment 
operator but assignment in expressions is a special case.   also <- or ->. 
C uses -> for functions but I think math/calculators use that for 
assignment.






From lists at cheimes.de  Fri May  2 15:46:54 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:46:54 +0200
Subject: IPv6 and Python
In-Reply-To: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <481B6FAE.6070505@cheimes.de>

Giampaolo Rodola' schrieb:
> I'm not sure if this is a question about python programming, system
> administration or sockets in general...
> I have the FTP server in my signature to which I'd want to add IPv6
> support.
> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?

Python supports IPv6 out of the box if the underlying OS supports it,
too. You just have to use AF_INET6 instead of AF_INET:

import socket
sock = socket.socket(sock.AF_INET6, socket.AF_STREAM) # IPv6
sock.bind(("::1", 21)) # bind to IPv6 localhost

That's it.

Christian



From bj_666 at gmx.net  Thu May  8 10:26:50 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 14:26:50 GMT
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de> <fvv0cg$rsh$1@aioe.org>
Message-ID: <68ggtaF2su97jU2@mid.uni-berlin.de>

On Thu, 08 May 2008 15:49:01 +0200, pistacchio wrote:

> Marc 'BlackJack' Rintsch ha scritto:
>> On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:
>> 
>>> Are you a newbie to Python, or to programming in general? I'll assume
>>> you are a newbie to programming in general because of that last
>>> question you asked. Things in Python are easier than in almost any
>>> other programming language. Here are three Hello World programs:
>> 
>> Counterexamples for quite short "greetings" in other programming languages:
>> 
>> (Free)BASIC::
>> 
>>   Print "Hello World!"
> 
> freebasic is another language i'd point out to a newbie, even if it is 
> not as multiplatform as python if. it has a decent community and a large 
> amount of libraries. it doesn't let you explore functional or, worse, 
> object oriented programming nor you can write server side programs with
> it.

OOP support is under development and why can't you write "server side
programs" in it?  CGI is possible.

> The others are examples of easy "hello world" languages, but, passed
> that, i think they don't have the same capabilities of python on terms
> of support, kind of programs you can write and even overall complexity
> (haskell forces you to functional programming, io is really a minor
> language, ocalm forces you to di OOP and, if writing hello world is
> simple, on the other hand ir may have lines of code that read like:
> 
> | [] -> []

Okay, Haskell's pure functional approach feels somewhat "weird".

Io is a minor language but a quite nice one IMHO.  Simple syntax and
relatively simple semantics but very powerful.

OCaml doesn't enforce OOP.  It's some kind of "mirror" of Python.  Python
is an OOP language with support for functional programming, and OCaml is a
functional language with support for OOP.

The biggest pro for Python among the easy and clear syntax languages is
the standard library and the amount of third party modules.

Ciao,
	Marc 'BlackJack' Rintsch


From danb_83 at yahoo.com  Wed May 28 02:46:07 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 27 May 2008 23:46:07 -0700 (PDT)
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<mailman.1664.1211934771.12834.python-list@python.org>
Message-ID: <9dd41de1-a992-430e-b710-653d4efa4b64@34g2000hsf.googlegroups.com>

On May 27, 7:32?pm, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> David C. Ullrich wrote:
> > What version added decorators (using the
> > @decorator syntax)?
>
> > (Is there a general way I could have found out the answer myself?)
>
> > Is there a somthing such that "from __future__ import something"
> > will make decorators work in 2.5.2?
>
> > David C. Ullrich
>
> See:
>
> http://www.python.org/doc/2.4/whatsnew/whatsnew24.html
>
> Dunno of a general way view a list of features versus releases, other
> than reading the "What's New in Python x" documents. ?Maybe some
> enterprising developer can compile this list? ?Hint, hint.

>>> [feature for feature in vars(__future__).items() if isinstance(feature[1], __future__._Feature)]
[('nested_scopes', _Feature((2, 1, 0, 'beta', 1), (2, 2, 0, 'alpha',
0), 16)),
 ('division', _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0),
8192)),
 ('with_statement', _Feature((2, 5, 0, 'alpha', 1), (2, 6, 0, 'alpha',
0), 32768)),
 ('absolute_import', _Feature((2, 5, 0, 'alpha', 1), (2, 7, 0,
'alpha', 0), 16384)),
 ('generators', _Feature((2, 2, 0, 'alpha', 1), (2, 3, 0, 'final', 0),
0))]



From tjreedy at udel.edu  Sat May 24 01:11:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 01:11:55 -0400
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com><JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com><8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com><69n463F33hfhfU2@mid.uni-berlin.de><f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com><slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>
	<ce293364-7aef-4c43-8504-5ae353c49406@e39g2000hsf.googlegroups.com>
Message-ID: <g1882s$j5s$1@ger.gmane.org>


"gianluca" <geonomica at gmail.com> wrote in message 
news:ce293364-7aef-4c43-8504-5ae353c49406 at e39g2000hsf.googlegroups.com...
| Thank you for help!
| I've done all you suggest and I've a objdump output like this:
| ...
| [ 86](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003755 _IsCoverRelD
| [ 87](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003657 _IsCoverRelA
| [ 88](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x000034f5 _IsCoverDX
| [ 89](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x0000341b _IsCoverA
| [ 90](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003072 _CoreRelD
| [ 91](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00002f5e _CoreRelA

The name above have one underscore.


| my funtions are the __IsCoverRelD, __IsCoverRelA, etc but when I call
| it (myLIB.__IsCoverRelA or myLIB.__IsCoverRelA()) I've the same
| problem.

These all have two.  So if that is what you actually did....

tjr





From rupole at hotmail.com  Thu May 29 11:41:27 2008
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 29 May 2008 11:41:27 -0400
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
Message-ID: <g1mir9$uvo$1@ger.gmane.org>


Kalibr wrote:
> I've been trying to figure out how to find the details of files
> (specifically music for now) for a little sorting script I'm making,
> My aim is to get details on the artist, album, and genre for mp3 and
> wma files (possibly more in the future). My closest match was when I
> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
> to help (and most of it went over my head). Is there any module I can
> use to find this sort of data? I'm trying to not make it specialised
> in music, because I may want to extend this to picture, movie, text
> etc. files in the future. Any ideas how I could go about this?

You can use the shell COM objects to access media properties
as shown by Explorer.

import win32com.client
sh=win32com.client.Dispatch('Shell.Application')

folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
ns=sh.NameSpace(folder)

## the column index for Artist may vary from folder to folder
for c in range(0,255):
    colname=ns.GetDetailsOf(None, c)
    if colname=='Artists':  ## This shows up as just Artist on XP
        for i in ns.Items():
            artist=ns.GetDetailsOf(i, c)
            if artist:
                print ns.GetDetailsOf(i, 0), artist
        break


            Roger





From jmillikin at gmail.com  Fri May 30 17:16:20 2008
From: jmillikin at gmail.com (John Millikin)
Date: Fri, 30 May 2008 14:16:20 -0700 (PDT)
Subject: Importing modules from packages with relative imports
Message-ID: <84a95625-791f-4fca-a820-95d2fee0dd78@w1g2000prd.googlegroups.com>

With the old import system, and a package that looks like this:

foo/
  __init__.py
  main.py
  bar/
    __init__.py
    baz.py

If I wanted to delay importing baz until it was actually used, I could
leave the __init__.py files empty and simply "import bar.baz".
However, with the new relative imports syntax, "from . import bar.baz"
causes a syntax error. I could use something like "from .bar import
baz as bar_baz", but that's long, annoying to write, and requires
changing all the uses of "bar.baz.spam" to "bar_baz.spam" through the
file. Is there any way to achieve the "bar.baz" name with relative
imports?


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:20:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:20:35 +0200
Subject: Code/test ratio wrt static vs dynamic typing
In-Reply-To: <87bq30gwjs.fsf@benfinney.id.au>
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
	<69hi0iF32kli9U1@mid.individual.net>
	<87bq30gwjs.fsf@benfinney.id.au>
Message-ID: <48340576$0$10773$426a74cc@news.free.fr>

Ben Finney a ?crit :
> greg <greg at cosc.canterbury.ac.nz> writes:
> 
>> Also, I don't think it's valid to equate the size of the tests with
>> the amount of effort it took to develop them. For instance, the test
>> suite for Pyrex is currently larger than the Pyrex compiler, but
>> I've still spent far more time and effort developing the compiler
>> than writing the tests.
> 
> Right. The unit test suite should tend to increase: add tests far more
> often than removing them. The application code, though, should tend to
> grow less rapidly: 

or even sometimes, at some point, start to shrink, thanks to:

> refactor duplication, remove redundant code,



From popuser at christest2.dc.k12us.com  Wed May  7 11:22:54 2008
From: popuser at christest2.dc.k12us.com (Pop User)
Date: Wed, 07 May 2008 11:22:54 -0400
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <4821C94E.6040500@christest2.dc.k12us.com>

Anton Slesarev wrote:
> 
> But I have some problem with writing performance grep analog.
> 

I don't think you can ever catch grep.  Searching is its only purpose in 
life and its very good at it.  You may be able to come closer, this 
thread relates.

http://groups.google.com/group/comp.lang.python/browse_thread/thread/2f564523f476840a/d9476da5d7a9e466

This relates to the speed of re.  If you don't need regex don't use re. 
  If you do need re an alternate re library might be useful but you 
aren't going to catch grep.




From jonbutler88 at googlemail.com  Wed May 21 18:18:50 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 15:18:50 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com>
Message-ID: <42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com>

On May 21, 11:08?am, alex23 <wuwe... at gmail.com> wrote:
> On May 21, 8:04 pm, alex23 <wuwe... at gmail.com> wrote:
>
> > Is your Spider class a subclass ofHTMLParser? Is it over-riding
> > __init__? If so, is it doing something like:
>
> > ? ? super(Spider, self).__init__()
>
> > If this is your issue[...]
>
> I'm sorry, this really wasn't clear at all. What I meant was that you
> need to call theHTMLParser.__init__ inside your Spider.__init__ in
> order to have it initialise properly. Failing to do so would lead to
> the .rawdata attribute not being defined. The super() function is the
> best way to achieve this.
>
> Sorry for the rambling, hopefully some of that is relevant.
>
> - alex23

Sorry, im new to both python and newsgroups, this is all pretty
confusing. So I need a line in my __init__ function of my class? The
spider class I made inherits from HTMLParser. Its just using the
feed() function that produces errors though, the rest seems to work
fine.

Thanks for the help,
Jon


From ptmcg at austin.rr.com  Mon May 19 15:28:04 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 12:28:04 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com> 
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
Message-ID: <74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>

On May 19, 11:04?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Paul McGuire <pt... at austin.rr.com> writes:
>
> [...]
>
> Could you use it as a decoratore instead?
>
> integer = Word("0123456789")
>
> @integer.setParseAction
> def parse_integer(tokens):
> ? ? return int(tokens[0])
>
> I could make your grammar clearer, because you don't mix it with
> processing code... and no need for lambdas!
>
> --
> Arnaud

What a sexy little idiom!  You could really apply this to any API
method that accepts a callable as a single argument, and pyparsing
actually has several of these:

setParseAction
addParseAction
setFailAction
setDebugActions

(Unfortunately, setDebugActions requires 3 callables for its arguments
- one to be run when an expression is about to be parsed, one to be
run after parsing is complete, and one to be run if the expression
fails to be parsed.  So setDebugActions can't be used in this
decorator manner.)

Using these methods as decorators deviates from the typical decorator
usage model as I understand it - instead of wrapping the provided
function within some enclosing setup/teardown code (like lock/unlock,
or open-file/close-file, or begin-transaction/commit-transaction), and
then returning the created wrapper function, the decorator usage you
propose is one in which the decorator uses the provided function with
some side-effect (such as setting a property), but then just returns
the original function.  By returning the original function, we could
stack decorators so that multiple expressions could share the same
parse action:

@articleTitle.setParseAction
@movieTitle.setParseAction
@bookTitle.setParseAction
def upcase_title(tokens):
    return " ".join( t.title() for t in tokens )

Here is where I have something of a hitch, with the way pyparsing
implements most setXXX methods.  setParseAction already returns a
value, and the value returned is self.  If you have any Smalltalk
background, this will seem familiar to you.  (Not that I was ever a
big-time Smalltalk coder, but this was one language idiom that you
learned on Day 0.5 or you were lost forever.)  This makes it easy to
chain together a constructor and multiple property setters into a
single expression:

timestamp = Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d)
{2}").setParseAction(convertTimeStamp).leaveWhitespace().setDebug()

In the case where we have a single parse action shared by multiple
expressions, we have to fall back to:

def upcase_title(tokens):
    return " ".join( t.title() for t in tokens )
articleTitle.setParseAction(upcase_title)
movieTitle.setParseAction(upcase_title)
bookTitle.setParseAction(upcase_title)

But, now that I've looked at this for a while, I may fall back on some
other idioms:
- just because you *can* do something doesn't mean you *should* do it
- explicit is better than implicit

Decorator syntax is already a mysterious topic for many newbies, even
when used for its normal application.  Using a decorator to perform
the same function as an explicit "set" call invokes cleverness at the
cost of clarity.  Using decorators to replace:

def methodX(a,b,c):
    blah
methodX = staticmethod(methodX)

with

@staticmethod
def methodX(a,b,c):
    blah

does have some merits, including DRY.  But using decorator syntax as
an implicit invocation of a set method? It's just taking advantage of
the incidental implementation of the decorator syntax. It would be
like implementing the logic of a for-loop using a list comprehension -
clever, and yes it can be done, but maybe a bit obscure.

-- Paul


From dave.g1234 at gmail.com  Fri May 16 17:23:42 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 14:23:42 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>
Message-ID: <31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>

Thanks for the responses.  I'm well aware that the function can be
passed in the parameters, passing in the functino as an arg defeats
the purpose of what I'm going after.

@ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
but a perfunctory glance looks like we're doing the close to the same
thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
can pass in other parameters to foo. Of course, getting the callers
locals/globals is bad in of itself.

best,
dave


From gagsl-py2 at yahoo.com.ar  Sat May 10 22:23:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 23:23:03 -0300
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
Message-ID: <op.uaywwpfax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:37:30 -0300, v4vijayakumar <vijayakumar.subburaj at gmail.com> escribi?:

> On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> v4vijayakumar a ?crit :
>>
>> > When I started coding in python, these two things surprised me.
>>
>> > 1. my code is inconsistently indented with the combination of tabs and
>> > spaces. Even lines looked intended, but it is not.
>>
>> Then you have a problem with your code editor - not with Python.
>>
>
> Editors can not be wrong. :)
>
> I think there should be some way to say python compiler, to consider
> tab and two blank spaces equal, when tab space = 2.

It already considers tab = 8 spaces, and when invoked with -tt it rejects mixed tabs+spaces. (I would like Python rejected *any* tab used for indenting...)
There is a tool 'reindent.py' -somewhere on your Python install-, and an indentation checker 'tabnanny.py' (this one in the standard library).

-- 
Gabriel Genellina



From mcknight0219 at gmail.com  Thu May 15 06:45:30 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 15 May 2008 03:45:30 -0700 (PDT)
Subject: create window on panel
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
	<mailman.1153.1210845280.12834.python-list@python.org>
Message-ID: <93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>

On May 15, 5:54 pm, Laszlo Nagy <gand... at shopzeus.com> wrote:
> Jimmy wrote:
> > Hi, all
>
> > I have been trying to use wxPython to design a GUI that will be
> > displayed on the panel on the top of desktop. that is when the
> > program starts, it will dwell on the panel to display some dynamic
> > information.
>
> > can anyone tell me in wxPython how to do this? thanks!
>
> AFAIK it cannot be done in pure wxPython. The reason is that your
> "panel" is part of the window manager. What kind of "panel" are you
> talking about anyway? Under Microsoft Windows it is called "the tray".
> In Gnome it is "panel" indeed. In KDE it might also be panel, there is
> OS X etc. They are quite different. For example, under MS Windows you
> cannot embed an application into the tray (other than an icon).
>
> They are all different window managers, based on different client libs
> (MS gui, GTK, Qt etc.). wxPython is designed to be platform independent,
> and  it does not support special, platform dependent features. (Well it
> does a few...)
>
> You need to tell us what kind of system are you using? Then we can tell
> you where to start. For example, there are extension modules for writing
> Gnome panel applications. (Well, it is not wxPython but GTK.)
>
> BTW the idea is good: we could have "panel" support in wxPython, but
> since the interface of these panels (and how they should be programmed)
> is very different on different platforms, it would not be easy to implement.
>
>    Laszlo

Thanks for your reply!

I am using Linux+gnome. Actually, what I want is simply a text-region
on the panel
and display some dynamic information on it. Is it hard to do it ?


From mobiledreamers at gmail.com  Wed May 14 03:45:12 2008
From: mobiledreamers at gmail.com (Mark)
Date: Wed, 14 May 2008 00:45:12 -0700
Subject: Help with setting local variables of class
Message-ID: <482A9888.2030207@gmail.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080514/5c373cde/attachment.html>

From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 09:47:55 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 15:47:55 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <482aed83$0$15325$426a74cc@news.free.fr>

Dave Parker a ?crit :
>> 5-10 times faster for what kind of code?
> 
> Mostly numerical analysis

Benches, please ? I mean : benches using Python's numpy or similar 
packages - that is, what anyone doing numerical intensive computation in 
Python would use.

> and CGI scripting.

Is there anyone still doing cgi nowadays ???

  >> I don't see anything that resembles OO features of python, ...
> 
> True.  But in Python, you don't see statically-linked pure-syscall CGI

Hopefully. And you don't see much cgi script at all, because we figured 
much better ways to do web programming.

> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year.  But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

Go tell this to google, youtube etc...

> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
> 
>   Write 10^2.
> 
> but can't understand why another programming language gives the answer
> 8 (Python):
> 
>   Print 10^2

This doesn't "give" 8 - this raises a syntax error.

Please RTFM :
1/ this is 'print', not 'Print'
2/ '^' is the bitwise XOR operator


ok, so not only do you spam this newsgroup, but you're also a clueless 
troll.


From kodifik at eurogaran.com  Thu May  8 04:12:27 2008
From: kodifik at eurogaran.com (kodifik at eurogaran.com)
Date: Thu, 8 May 2008 01:12:27 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
Message-ID: <b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>


> ? ? ? ? ?| ? PLEASE DO NOT ? | ? ? ? ? ? ?:.:\:\:/:/:.:
> ? ? ? ? ?| ?FEED THE TROLLS ?| ? ? ? ? ? :=.' - ? - '.=:

I don't think Xah is trolling here (contrary to his/her habit)
but posing an interesting matter of discussion.

Don't know to which point it fits, but I would like to do some rather
novel comment on operator naming:
As a non native english speaker, the first time I ever encountered the
word "if" was when learning to program. The same can be said of the
other words (for, then, else...) This caused my brain to adscribe them
meanings completely outside the context of everyday language. My point
is that perhaps this is advantageous. So, contrary to tradition (which
considers a desirable goal to write programs as close as possible to
everyday english), I found convenient that programming languages use
words different from the words of my native tongue. I suspect that is
why car and cdr have caught on vs. first end rest.


From ewertman at gmail.com  Sat May 24 10:40:43 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Sat, 24 May 2008 10:40:43 -0400
Subject: unittest: Calling tests in liner number order
In-Reply-To: <a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <92da89760805240740t46e219c2ueef2aa02e01a7b93@mail.gmail.com>

>I can't relate to anyone that want to oppose a change that would give
>more freedom to a programmer.

While in general I agree with this.. I think in the case of python
part of it's base philosophy seems to be a tendency to encourage a
single way of doing things, and create a path of least resistance to
the "best" way.  "best" in this case being one or a handful of peoples
opinion.  I'm really ok with this, personally.  I think it's working
well.

So.. I'll post this because I'm sure at least one person hasn't seen it:

>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!


From rdm at rcblue.com  Wed May 28 13:05:10 2008
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 28 May 2008 10:05:10 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
Message-ID: <20080528170522.91AE01E4008@bag.python.org>


Date: Wed, 28 May 2008 11:29:59 -0400
From: "Sean Azelton" <sazelton at nd.edu>
To: Tutor at python.org
Subject: Re: [Tutor] A video introducing Ulipad, an IDE mainly for Python

For those looking for the codec and not running Windows, you can find
it here for Mac OS X as well

http://www.techsmith.com/download/codecs.asp



From sipickles at hotmail.com  Fri May  2 14:27:56 2008
From: sipickles at hotmail.com (Simon Pickles)
Date: Fri, 02 May 2008 19:27:56 +0100
Subject: Writing elapsed time as a string
Message-ID: <BAY114-DAV1382E1C44054F4D69AFE50BEDA0@phx.gbl>

Hello.

I'm sorry if this has been asked a thousand (million) times.

Is there a nifty pythonesque way to produce a string representing an 
elapsed time period, in terms of years, months, days, hours, mins, seconds?

I am storing times in a MySQL db, and would love to be able to write the 
time elapsed between accesses of certain data. These are in seconds 
since the epoch, as produced by time.time()

It is probable right in front of me in the docs but I am spinning off 
into outer space (mentally!)

Thanks for the temporary loan of your clarity and experience.

Simon
-- 

http://www.squirtual-reality.com
--------------------------------
Linux user #458601 - http://counter.li.org.





From rhamph at gmail.com  Sun May 11 12:21:12 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sun, 11 May 2008 09:21:12 -0700 (PDT)
Subject: Unimport statement
References: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
	<mailman.937.1210494391.12834.python-list@python.org>
Message-ID: <e4c860ed-db18-4f6c-9284-5978027bf6a0@f24g2000prh.googlegroups.com>

On May 11, 2:13 am, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> The main problem are references to objects within a module, because
> we can NEVER be sure there aren't any, even though we cleaned up
> everything, that's just a consequence of Python nature. We can keep
> the old objects referenced and it would make an equivalent to the
> reload() builting, just without loading the module, in effect the
> same as removing it from sys.modules and deleting imported references.
> I do not see any possibe clean way to unload a module...

With the finalizer changes in safethread I think I could pull it off.
Put the module in a cycle, add a weakref to it, remove it from
sys.modules, then run a full collection.  If the weakref clears,
success.  If the weakref doesn't clear, module isn't deleted, readd it
to sys.modules, clean up, and raise an exception.  It won't always
remove the module, but it will do so safely and atomically.

The finalizer changes are necessary as current Python will run __del__
and weakref callbacks as it deletes the module.  It may get
resurrected, get only half done, etc.  Nasty stuff.


From subhabrata.iisc at hotmail.com  Wed May 28 04:08:13 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 01:08:13 -0700 (PDT)
Subject: Creating a web page with Python
References: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>
	<e8e4e940-dc6f-4396-be84-561f1a7e87dd@2g2000hsn.googlegroups.com>
Message-ID: <81aecbd7-122e-437e-a47f-8c5ed149e81e@d19g2000prm.googlegroups.com>

Dear Mike,
Thanx your solutions came to the very point. And you understood the
problem so nicely. It is just perfect.
Great.
Regards,
Subhabrata Banerjee.

Mike Driscoll wrote:
> On May 27, 9:25?am, subhabrata.i... at hotmail.com wrote:
> > Dear Members of the group,
> > If any one can help me with an idea how to create a web page with
> > python? Do I have to use vbscript or something like that? I also want
> > to embed the function in the button of a form. How can I do it in
> > Python?
> > Regards,
> > Subhabrata Banerjee.
>
>
> There are many ways to do this. You can use Python kind of like cgi:
>
> http://www.python.org/doc/essays/ppt/sd99east/index.htm
> http://docs.python.org/lib/module-cgi.html
>
> WSGI: http://www.wsgi.org/wsgi
>
> Web Frameworks: Django, TurboGears, Pylons, mod-python, Zope/Plone
>
> Or you might just want to browse Python's wiki:
>
> http://wiki.python.org/moin/WebProgramming
>
> Mike


From nrohan at gmail.com  Mon May 26 04:35:05 2008
From: nrohan at gmail.com (Rohan)
Date: Mon, 26 May 2008 01:35:05 -0700 (PDT)
Subject: CGI question
Message-ID: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>

Hi

I have python-CGIs for my web application running on apache 2.
Few of the CGIs run for a long time.

When such a CGI is running and user presses "Stop" button of browser
(or connection is aborted) how can I identify such situation and
terminate
the CGI.
I don't want the CGI to complete the processing and terminate when it
tries to write to client pipe.
It would be good to terminate it as soon as client connection is
aborted.

How can I achieve this?

Any help is appreciated!

Thanks
Rohan


From __peter__ at web.de  Thu May 22 15:13:36 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 May 2008 21:13:36 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <g14gkp$gs2$01$1@news.t-online.com>

Joel Koltner wrote:

> Is there an easy way to get a list comprehension to produce a flat list
> of, say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn
> this back into what I want, but I was hoping there's some way to avoid the
> "lists of lists" generation in the first place?


>>> [x*y for x in range(4) for y in 1,2]
[0, 0, 1, 2, 2, 4, 3, 6]


> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip"
> to do so?

>>> items = [None] * 6
>>> items[::2] = 1,2,3
>>> items[1::2] = 4,5,6
>>> items
[1, 4, 2, 5, 3, 6]

Peter


From matthias.blaesing at rwth-aachen.de  Wed May 28 14:07:16 2008
From: matthias.blaesing at rwth-aachen.de (Matthias =?iso-8859-1?q?Bl=E4sing?=)
Date: 28 May 2008 18:07:16 GMT
Subject: convert string number to real number - ValueError: invalid 
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
	<mailman.1676.1211955740.12834.python-list@python.org>
	<a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>
Message-ID: <pan.2008.05.28.18.07.20@rwth-aachen.de>

Am Wed, 28 May 2008 10:41:51 -0700 schrieb davidj411:

> I like the str2num function approach, but then i get left with a float
> that has more than 2 decimal spaces , i.e. 11.50 becomes
> 11.449999999999999 and round will not fix that.

Welcome to the wonderful world of floating point numbers. For your usage 
you want 10-based numbers. Have a look at the decimal module:

>>> from  decimal import Decimal
>>> a = Decimal("11.45")
>>> a
Decimal("11.45")
>>> str(a)
'11.45'
>>> a + 1
Decimal("12.45")
>>> a + Decimal("1.55")
Decimal("13.00")

HTH

Matthias


From notnorwegian at yahoo.se  Mon May 26 16:51:46 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 13:51:46 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com> 
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>
Message-ID: <6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>

On 26 Maj, 22:16, miller.pau... at gmail.com wrote:
> On May 26, 3:56 pm, notnorweg... at yahoo.se wrote:
>
> > is the first example here a layer between machine and the second
> > example?
>
> My first example was intended to be C, or at least close to it.  The
> second example is Python.  I consider the C snippet to be low-level,
> while the corresponding Python is high-level.  There are simply fewer
> extraneous details for me to worry about at the Python level, and
> that's why I prefer to work with Python over C when practical.

i know one is C and one i spython, iwas talking more at a conceptual
level and i know cpython is written in C.

what im asking is can a highlevellanguage be written directly on top
of the machine or a highlevellanguage is always written on top of a
lowlevellanguage?

i eman do they have basic operators that are more abstract in their
nature?


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 12:00:47 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 18:00:47 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
	<ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>
Message-ID: <4836ea15$0$23643$426a74cc@news.free.fr>

David C. Ullrich a ?crit :
> On Fri, 23 May 2008 09:13:50 -0400, "John Salerno"
> <johnjsal at NOSPAMgmail.com> wrote:
> 
>> "Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
>> message news:4836747b$0$15488$426a74cc at news.free.fr...
>>> Ever heard of the "Model/View/Controller" pattern ?
>> Yes, I have, but I probably don't understand it well enough yet. For 
>> example, I don't  really know what is meant by phrases like "build a model", 
>> "the view registers itself with the model", "interations are sent to the 
>> appropriate controller" -- I may understand them literally, but I get the 
>> feeling that the implementation of these ideas are beyond me. 
> 
> I doubt that.
> 
> I've done things like this. I ended up with just a Model and a View,
> no Controller.

In the code snippet you gave, you do have the controller part - it's 
just merged with the view. Thruth is that the controller part does not 
map to a single, explicit, obvious *component*. It  in fact often 
happens that the controller bits are handled by various components of 
the system.

In the case of most modern GUI toolkits, the OS and GUI toolkit handles 
the first part of the controller stuff : mapping user actions to 
appropriate events, then mapping events to event handlers 
functions/methods - which, since views and controllers are usually 
tightky coupled, are most often than not methods of the view object 
itself - either because the GUI toolkit requires it or because the coder 
found it simpler and more obvious. Now even in the first case, you can 
still factor the controller part out of the view, and have the view's 
event handlers call on the controller. This may help unit-testing both 
the controller and the view and avoid having too much logic into the 
view itself.



From lists at cheimes.de  Mon May 12 14:06:03 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 12 May 2008 20:06:03 +0200
Subject: execfile python3k
In-Reply-To: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>
References: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>
Message-ID: <g0a0ub$nbf$1@ger.gmane.org>

Odys schrieb:
> Hi there,
> 
> Since execfile() is removed in Python 3.0
> I have question about using exec.
> 
> I know about
>   exec(open('filename').read())
> but from documentation the 1st arg of exec can be 'file object'.
> However
>    exec(open('filename'))
> does not work.
> Does anybody have idea how to construct 'file object' then?

It's a know bug in Python 3.0.

Christian



From florencio.cano at gmail.com  Fri May  9 04:41:07 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Fri, 9 May 2008 10:41:07 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <4823268D.1060602@egenix.com>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
	<4823268D.1060602@egenix.com>
Message-ID: <c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>

I have control over agent and client but I'm not sure how to use
pickle for this task. Do you suggest to pickle the objects that I want
to send and send it over a usual socket? I have searched a bit in
Google and I have seen that Pickle is insecure by default. What do you
think about this?

2008/5/8 M.-A. Lemburg <mal at egenix.com>:

> SOAP would be a good choice if you want to send to data to other
> servers as well, e.g. Java-based ones.
>
> XML-RPC and JSON are better for simple data structures.
>
> If you have control over both client and server and don't
> need to bother with other backends or frontends, Python
> pickle is the best choice.


From s0suk3 at gmail.com  Wed May 14 00:28:37 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 13 May 2008 21:28:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <7d061dcc-b2ae-4c0e-b314-2c4eb92adce0@e39g2000hsf.googlegroups.com>

On May 13, 10:24 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> >  The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps.  Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>

It doesn't matter if it's $19.95 or $0.1; why would anyone even bother
looking at such a weird and unconventional language? And why do you
bring up books? Are Flaming Thunder books free? (I doubt there's even
one).

> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).

Easier? Such an unconventionality? I don't think anybody will ever
need an easier language than Python; Python touched bottom on that
area.

> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables).  So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.

I doubt that any Python "user" (please don't say, "user", Python
programmers are not customers of some clunky proprietary product,
they're programmers using a open source tool) has ever touched
"Flaming Thunder", or anything that even looks like that, since Python
programmers are somewhat more conventional, more like in the C lang,
so they may use things like Java, C/C++, but never something that says
"Set this to this"...

Also, Python is relatively slow, compared to compiled languages. But
if anyone wants speed, they'll go for C, which can be around 50-200
times faster than Python. It's speed of development versus speed of
execution. So why would anyone use such an unconventional thing like
your language, which is statically typed (is it?), if they would only
gain from 5-10 times faster?

> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.

You claim that "repeat n times" if better than for loops (it's "for",
not "FOR"). It's a matter of taste. But just out of a wild guess, I'd
say one 100% of the developers around the world (except you) will
always prefer for loops rather than your weird thing.

> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed.  The difference: I
> can't afford to ignore users.

Again, if may be awkward for you, but most of us around here (well,
all, really) will never try to program something by saying
"repeat..." (as I said, it's a matter of taste, and you have a pretty
weird taste).

Now, let's be realistic for a moment. The big crack you call a
programming language will never get any attention. So get out of home
and go get a life.


From Dominique.Holzwarth at ch.delarue.com  Mon May 26 04:31:27 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Mon, 26 May 2008 09:31:27 +0100
Subject: Writing traceback of an exception into a log-file
Message-ID: <5213E58D85BC414998FA553C701E386C0EF281CB4D@SGBD012511.dlrmail.ad.delarue.com>


Hi all

I'm trying to write the traceback stack of an exception that is thrown into a log file, but currently all that's written is simply a "None" :-/

Here's some example code of what I'm doing:

Import traceback
class myException(Exception):
        def __init__(self):
                f = open('filename.txt', 'a')
                traceback.print_exc(file=f)
                f.close()

The file handling (opening etc) works ok (I'm using the same file in combination with a Logger() object too) but the string written to the file is effectively just a "None".

Could anyone explain to me how to properly use the traceback module with it's countless of functions? =)

Thanks in advance,
Dominique


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From bignose+hates-spam at benfinney.id.au  Tue May 13 19:34:31 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:34:31 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
Message-ID: <87ve1h4w3c.fsf@benfinney.id.au>

John Nagle <nagle at animats.com> writes:

> Matt Nordhoff wrote:
> > Well, you should use "xrange(10)" instead of "range(10)".
> 
>   CPython really is naive.  That sort of thing should be a
> compile-time optimization.

Or even a case of the 'xrange' behaviour making 'range' obsolete.

Which, as I pointed out earlier in the thread, it is in Python 3.0.

-- 
 \     "Yesterday I parked my car in a tow-away zone. When I came back |
  `\                   the entire area was missing."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From artyprog at gmail.com  Wed May 21 03:51:40 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Wed, 21 May 2008 09:51:40 +0200
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <4833d48d$0$898$ba4acef3@news.orange.fr>

> He meant it has been re-implemented in Javascript:

Indeed :-)

 There is a jython based NodeBox that runs on windows that can be found
> here:
>
> http://research.nodebox.net/index.php/NodeBoxDev
>
Thank you 




From notnorwegian at yahoo.se  Sun May 25 21:42:06 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:42:06 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
Message-ID: <a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>

Traceback (most recent call last):
  File "C:/Python25/Progs/WebCrawler/spider2.py", line 47, in <module>
    x = scrapeSites("http://www.yahoo.com")
  File "C:/Python25/Progs/WebCrawler/spider2.py", line 31, in
scrapeSites
    site = iterator.next()
RuntimeError: Set changed size during iteration


def joinSets(set1, set2):
    for i in set2:
        set1.add(i)
    return set1

def scrapeSites(startAddress):
    site = startAddress
    sites = set()
    iterator = iter(sites)
    pos = 0
    while pos < 10:#len(sites):
        newsites = scrapeSite(site)
        joinSets(sites, newsites)
        pos += 1
        site = iterator.next()
    return sites

def scrapeSite(address):
    toSet = set()
    site = urllib.urlopen(address)
    for row in site:
        obj = url.search(row)
        if obj != None:
            toSet.add(obj.group())
    return toSet


wtf? im not multithreading or anything so how can the size change here?


From dullrich at sprynet.com  Thu May 22 07:26:41 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Thu, 22 May 2008 06:26:41 -0500
Subject: "indexed properties"...
References: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
	<20080521124744.17546846@outerspace>
Message-ID: <7sla341agcpd1729k5pa0e0hern05qtv22@4ax.com>

On Wed, 21 May 2008 12:47:44 +0200, pataphor <pataphor at gmail.com>
wrote:

>On Tue, 20 May 2008 10:40:17 -0500
>"David C. Ullrich" <dullrich at sprynet.com> wrote:
>
>> > > Today's little joke: Long ago I would have solved
>> > > this by storing the data as a list of rows and _also_
>> > > a list of columns, updating each one any time the
>> > > other changed. Just goes to show you things
>> > > could always be worse...
>> > 
>> > Well have I ever ... I only thought about this last week and I
>> > actually thought it was a *good* idea. 
>> 
>> Sorry. If you really want to do this you could keep things
>> in sync automatically by writing the appropriate __setitem__
>> and resolving never to modify the data except through that...
>> 
>> def whatever.__setitem__(self, (row,col), value):
>>   self.rows[row][col] = value
>>   self.cols[col][row] = value
> 
>Using the trick of encapsulating the values inside single-element lists
>one can make a transposition of the matrix and get synchronicity for
>the little price of doubling the number of instances. Since the views
>share the data this is a lot less expensive than one would think. One
>can use the row view or the column view to alter data and the changes
>will automatically be visible in the other view, since the views update
>the same lists. 

Oh - that's different. This is not what I thought you had in mind
(it's not what I had in mind in the thing I called a joke.)

>There is a little notational gotcha, instead of writing
>row[0] = [1,2,3] one now must write row[0][:] = [1,2,3] or else
>synchronicity is lost.
>
>I found a nice ListMixin class at
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440656
>
>Using that I wrote the following proof of concept:
>
>class Storage(ListMixin):
>
>  def __init__(self, seq=[]):
>    self.L = [[x] for x in seq] 
>
>  def _constructor(self, iterable):
>    return Storage(iterable)

Probably I'm just being dense. Why does
_constructor exist? (Oh - looking at things
below, I imagine it's something to do with
ListMixin.)

>  def __len__(self):
>    return len(self.L)
>
>  def _get_element(self, i):
>    assert 0 <= i < len(self)
>    return self.L[i][0]
>
>  def _set_element(self, i, x):
>    assert 0 <= i < len(self)
>    self.L[i][0] = x
>
>  def _resize_region(self, start, end, new_size):
>    assert 0 <= start <= len(self)
>    assert 0 <= end   <= len(self)
>    assert start <= end
>    self.L[start:end] = [[None] for i in range(new_size)]
>
>def test():
>    n = 3
>    R = range(n)
>    it = iter(range(n*n))
>    MR = [Storage(it.next() for i in R) for i in R]
>    MC = [Storage() for i in R]
>    T = zip(*[x.L for x in MR])
>    for x,y in zip(MC,T):
>        x.L = y
>    print MR
>    print MC
>    MC[2][:] = 'abc'
>    print
>    print MR
>    print MC
>    
>if __name__=='__main__':
>    test()
>
>Output:
>
>[Storage([0, 1, 2]), Storage([3, 4, 5]), Storage([6, 7, 8])]
>[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage([2, 5, 8])]
>
>[Storage([0, 1, 'a']), Storage([3, 4, 'b']), Storage([6, 7, 'c'])]
>[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage(['a', 'b', 'c'])]
>
>P.

David C. Ullrich


From duncan.booth at invalid.invalid  Fri May 23 08:18:43 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 12:18:43 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
Message-ID: <Xns9AA78619210F2duncanbooth@127.0.0.1>

Erwin Moller 
<Since_humans_read_this_I_am_spammed_too_much at spamyourself.com> wrote:

> Why do you say it 'tastes less' then Python?
> I don't want to start a religious war, but am curious.
> Who knows, maybe  I'll dump PHP and start using Python after your 
> answer. ;-)

I may not be a good person to answer this since I don't know PHP: I don't 
have any religious objection to it, but I just never found it intuitive in 
the way I found Python fits my mindset.

On those rare occasions when I've helped someone who wanted advice I've 
found that my Python oriented viewpoint can be quite hard to translate to 
PHP. For example I'd suggest 'oh you just encode that as utf8' only to be 
told that there's no easy way to do that (have just Google'd it looks like 
there is now a way to do that but with a big red warning about it being 
EXPERIMENTAL and only use at your own risk).

(Looking at the example given for unicode_encode it appears to depend for 
its working on a global setting which isn't included in the example. I may 
have misunderstood the example but if I read that correctly its a good 
example of why PHP doesn't fit my brain.)

Anyway Google should find you plenty of articles comparing the languages. 
I'd say you use whichever feels right to you. I would also suggest you 
should try Python at least a bit (but since I don't intend to do the same 
for PHP you may not count my advice for much).

I found these pretty quickly:

http://python.about.com/od/gettingstarted/ss/whatispython_4.htm
http://wiki.w4py.org/python-vs-php.html


-- 
Duncan Booth http://kupuguy.blogspot.com


From notnorwegian at yahoo.se  Thu May 22 20:36:29 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 17:36:29 -0700 (PDT)
Subject: spider, why isnt it finding the url?
References: <08c10a3d-8cb8-433f-9831-cecf8fb7095b@y21g2000hsf.googlegroups.com>
Message-ID: <712878ec-de34-41ea-a938-a83920f8ef66@m45g2000hsb.googlegroups.com>

On 23 Maj, 02:02, notnorweg... at yahoo.se wrote:
> this program doesnt produce any output, however i know from testing
> that the url-regexp matches urls...
>
> import urllib
> import re
>
> site = urllib.urlopen("http://www.python.org")
>
> email = re.compile(r'[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}')
> url = re.compile("^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]{1}
> ([\w\-]+\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?
> ((\?\w+=\w+)?(&\w+=\w+)*)?")
>
> for row in site:
>     obj = url.search(row)
>     if obj != None:
>         print obj.group()

hmm ok it it printing it rows per rows. not what i expected.



From fariba42064 at yahoo.com  Thu May 29 14:45:01 2008
From: fariba42064 at yahoo.com (John)
Date: Thu, 29 May 2008 11:45:01 -0700 (PDT)
Subject: so funny...
Message-ID: <620361d6-5eb2-482a-8e28-4b2e9c906ece@26g2000hsk.googlegroups.com>

http://sitscape.com/topic/funny

Just keep hit the "Surprise->" button there for amazing fun.
Click on "channel" will show you other topics, lots of fun!



From tjreedy at udel.edu  Thu May  1 13:04:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 13:04:50 -0400
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
Message-ID: <fvct7f$9lp$1@ger.gmane.org>


"jmDesktop" <needin4mation at gmail.com> wrote in message 
news:c7424798-5b2c-4a72-8cfb-023ac067db71 at w7g2000hsa.googlegroups.com...
| This program:
|
| s = 'abcde'
| i = -1
| for i in range (-1, -len(s), -1):
|    print s[:i], i
|
| gives
|
| abcd -1
| abc -2
| ab -3
| a -4
|
| Why doesn't the first one have the e if -1 is the end of the list?  In
| Dive Into Python it said that -1 was the end of the list.  Thanks.

A sequence with n items has n+1 slice positions, numbered 0 to n: the 2 at 
beginning and end and n-1 between items.  Example
-a-b-c-
0 1 2 3
has 4 slice positions.
Hence the first item is seq[0:1] and last is seq[n-1:n]

In a sense, we 'ought' to index sequences with average of two successive 
slice positions, giving seq[1/2],,,seq[n-1/2].
But this is inconvenient, so we either round down (C, Python, etc) or up 
(Fortran), giving seq[0],,,,seq[n-1] or seq[1],,,seq[n].
Python allows n-1 and n-k to be abbreviated as -1 and -k.

-1 as an abbreviation of n-1 is only the end of the list for indexing.
n is the end for slicing.  It is abbreviated by omission.  Perhaps

for i in range(n+1): print i, 'abcde'[:5-i]

will make this all even clearer.

Terry Jan Reedy






From nrohan at gmail.com  Mon May 26 06:25:35 2008
From: nrohan at gmail.com (Rohan)
Date: Mon, 26 May 2008 03:25:35 -0700 (PDT)
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
	<69vg5qF34vemeU1@mid.uni-berlin.de>
Message-ID: <bf1929ee-647b-4046-b1ea-d693020503a2@w1g2000prd.googlegroups.com>

Thanks Diez for your suggestion.

>
> The only way I can think of is to regularly output something inside the CGI,
> and thus make it fail in the very moment the pipe is closed.
>

I also thought of this, but this looks little crude approach.
The problem seems very generic I was wondering if it could be handled
more
gracefully by some configuration in Apache or cgi script.

Apache process handling the request would close the connection with
client,
but it won't notify anything to spawned CGI process, so it keeps
running.




From kay.schluehr at gmx.net  Wed May 21 01:22:21 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 20 May 2008 22:22:21 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <24d11d17-118a-421f-83b0-327494446f9f@m3g2000hsc.googlegroups.com>

On 18 Mai, 00:32, Vicent Giner <vgi... at gmail.com> wrote:

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

If Python doesn't run in production systems execution speed doesn't
matter much. What actually matters when *developing* non-trivial algos
is to partition the dataflow because it might take just long to reach
a certain execution point that is of current interest - and it has to
be reached repeatedly. For each method call one might want to work
with pre-computed data that were serialized in a former run. Given
Pythons flexibility this shall be easy and so it is! The combination
of object pickling/unpickling and using decorators makes this a snap.
Just look at the following simple decorator:

def dump_data(func):
    def call(*args, **kwd):
        res = func(*args, **kwd)
        fl = open("dump_data.pkl", "w")
        pickle.Pickler(fl, 0).dump(args[0])
        return res
    call.__name__ = func.__name__
    call.__doc__ = func.__doc__
    return call

and the corresponding loader:

def load_obj():
    f = open("dump_data.pkl")
    return pickle.Unpickler(f).load()

One might decorate an arbitrary object method foo() with dump_data and
resume the activity of the object after foo has been called in another
run by restoring the object with load_obj.

One can further improve this by serializing the test driver when it is
implemented as a generator. This is non-standard though and requires
some work [1] of my own or Stackless Python [2] alternatively.

What I intended to make clear is that Python has many goodies as a
toolbox besides having lots of bindings and being well readable ( the
usual suspects when it comes to advocation in threads like these ).

[1] http://www.fiber-space.de/generator_tools/doc/generator_tools.html
[2] http://www.stackless.com/




From christophberendes at gmail.com  Fri May  2 16:06:42 2008
From: christophberendes at gmail.com (chrisber)
Date: Fri, 2 May 2008 13:06:42 -0700 (PDT)
Subject: my module and unittest contend over commandline options...
References: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>
	<Xns9A9264BA67F0duncanbooth@127.0.0.1>
Message-ID: <3a38a998-e320-42e8-8186-72534815b8c5@f36g2000hsa.googlegroups.com>

On May 2, 4:54 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> chrisber<christophberen... at gmail.com> wrote:
> > ...it leaves me
> > wonderfing whether there would have been another clean way to allow
> > both my test code and unittest to have options without interfering
> > with one another.
>
> You can pass argv as a parameter to main(), so I think the best bet is
> simply to build up a new argv with the options that you want to pass
> through.

Aha! I scanned through my python 2.4 installataion and found this in
unittest
  def __init__(self, module='__main__', defaultTest=None,
                 argv=None, testRunner=None,
testLoader=defaultTestLoader):
        if type(module) == type(''):
            self.module = __import__(module)
            for part in module.split('.')[1:]:
                self.module = getattr(self.module, part)
        else:
            self.module = module
        if argv is None:
            argv = sys.argv

so I see what you mean. Thanks.



From yves at zioup.com  Fri May  9 01:15:21 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 05:15:21 GMT
Subject: slicing lists
In-Reply-To: <9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
	<9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>
Message-ID: <J5RUj.124719$Cj7.108485@pd7urf2no>

MRAB wrote:

> You should've read the thread entitled "Why don't generators execute
> until first yield?"! :-) Michael Torrie gave the URL
> http://www.dabeaz.com/generators/Generators.pdf. Your example can be
> rewritten as follows:
> 
> p = file('/etc/passwd') # No need for readlines() because file's
> iterator yields the lines.
> r = ( e.strip().split(':') for e in p ) # A generator expression
> instead of a list comprehension.
> s = [  e[0:1] + e[2:]   for e in r ]

Thanks, this is very elegant indeed, but because there are two list 
comprehension expressions (the one defining r and the one defining s), it 
means that the we're looping twice over the same list instead of once with 
the e[0,2:] hypotetical notation ; or am I missing something ?

Yves.
http://www.SollerS.ca


From bruno.desthuilliers at gmail.com  Wed May  7 18:46:54 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:46:54 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org> 
	<b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com> 
	<387351b2-cea5-4206-874d-6dfb94fda94b@8g2000hse.googlegroups.com>
Message-ID: <ec0154e6-2b2d-4220-ab65-285778cc21b7@x41g2000hsb.googlegroups.com>

On 7 mai, 23:20, John Roth <johnro... at gmail.com> wrote:
> On May 7, 3:03 pm, "bruno.desthuilli... at gmail.com"
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
>
> > > M?ta-MCI (MVP) wrote:
> > > > Hi!
>
> > > >> I don't often feel like using this word
>
> > > > Look at languages like OCAML or F #
>
> > > > @-salutations
>
> > > Well of course, we're all well aware of other languages that allow
> > > variables to be bound in the middle of an expression.  It's just that
> > > Python was purposely created without that (mis)feature because it's so
> > > unclear, and easy to abuse.
>
> > This is the same argument that has been used to justify the lack of MI
> > and operator overloading in Java.
>
> > Not that I would support having assignment as expressions in Python
> > (wouldn't fit the whole design IMHO), but this is still a somewhat
> > arbitrary design choice, not necessarily a GoodThing(tm) by itself -
> > well designed expression-based languages have their strength too.
>
> Clearly this leaves C and C++ out [grin].

Indeed.  Neither are expression-based languages anyway.



From josiah.carlson at gmail.com  Tue May 13 11:59:04 2008
From: josiah.carlson at gmail.com (Josiah Carlson)
Date: Tue, 13 May 2008 08:59:04 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
Message-ID: <8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>

Ludvig,

In a substantial way, I agree with you.  Calling initiate_send()
within push or push_with_producer is arguably a misfeature (which you
have argued).

In a pure world, the only writing that is done would be within the
handle_send() callbacks within the select loop.  Then again, in a
perfect world, calling readable() and writable() would have no strange
side affects (as your example below has), and all push*() calls would
be made within the handle_*() methods.

We do not live in a pure world, Python isn't pure (practicality beats
purity), and by attempting to send some data each time a .push*()
method is called, there are measurable increases in transfer rates.

In the particular case you are looking at (and complaining about ;) ),
if you want to bypass the initiate_send() call, you can dig into the
particular implementation of asynchat you are using (the internals may
change in 2.6 and 3.x versus 2.5 and previous), and append your output
to the outgoing queue.  You could even abstract out the push*() calls
for a non-auto-sending version (easy), write your own initiate_send()
method that checks the stack to verify that it's being called from
handle_send() (also easy), or any one of many other work-arounds.

Yes, it would be convenient to not have push*() actually send data
when called in some cases, but in others, the increase in data
transfer rates and/or reduction in latency is substantial.

 - Josiah

ludvig.ericson at gmail.com wrote:
> Hello,
>
> My question concerns asynchat in particular. With the following half-
> pseudo code in mind:
>
>     class Example(asynchat.async_chat):
>         def readable(self):
>             if foo:
>                 self.push_with_producer(ProducerA())
>             return asynchat.async_chat.readable(self)
>
> Now, asyncore will call the readable function just before a select(),
> and it is meant to determine whether or not to include that asyncore
> dispatcher in the select map for reading.
>
> The problem with this code is that it has the unexpected side-effect
> of _immediately_ trying to send, disregarding if the async_chat object
> is indeed writable or not.
>
> The asynchat.push_with_producer (and .push as well)
> call .initiate_send(), which in turn calls .send if there's data
> buffered. While this might seem logical, it isn't at all.
>
> Insinuate that when Example.readable is called, the socket has already
> been closed. There are two possible scenarios where it could be
> closed. a) The remote endpoint closed the connection, and b) the
> producer ProducerA somehow closed the connection (my case).
>
> Obviously, calling send on a socket that has been closed will result
> in an error - EBADF, "Bad file descriptor".
>
> So, my question is: Why does asynchat.push* call self.initiate_send?
> Nothing in the name "push" suggests that it'll transmit immediately,
> disregarding potential "closedness". Removing the two calls
> to .initiate_send() in the two push functions would still mean data is
> sent, but only when data can be sent - which is, IMO, what should be
> done.
>
> Thankful for insights,
> Ludvig.


From victor.herasme at gmail.com  Thu May 29 08:16:07 2008
From: victor.herasme at gmail.com (victor.herasme at gmail.com)
Date: Thu, 29 May 2008 05:16:07 -0700 (PDT)
Subject: Tuple of coordinates
Message-ID: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>

Hi,

i am using a software which uses python as its scripting language. I
want to generate a list of coordinates more or less this way:

for i in (beg, end, step):
     for j in (beg, end, step):
          for k in (beg, end, step):
.........

Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))


Can anyone give me some advice on how to achieve this ? I got a little
idea, but still need to keep working til i get it. Thanks in advance,


Victor


From duncan.booth at invalid.invalid  Sun May 25 05:15:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 May 2008 09:15:45 GMT
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
	<mailman.1552.1211679461.12834.python-list@python.org>
Message-ID: <Xns9AA9687021A04duncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth
> <duncan.booth at invalid.invalid> escribi?: 
>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid>
>> wrote: 
>>
>>> Not to say that your concerns are pointless, and that things cannot
>>> be improved somehow, but this is not that trivial, and there may be
>>> ambuiguities in some not so rare cases.
>>
>> It might be worth considering an alternative approach here: a
>> formatted exception includes the relevant source lines (where
>> possible). 
> 
> Just to note that the standard cgitb module already does that, among
> other things. 
> 
Anywhere Python prints a traceback already does that. The 'alternative 
approach' I was suggesting was the part you snipped, i.e. extracting the 
enclosing class name from the source.


From __peter__ at web.de  Fri May 16 07:54:23 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 13:54:23 +0200
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
Message-ID: <g0jslc$paa$01$2@news.t-online.com>

Christian Heimes wrote:

> globalrev schrieb:
>> cust1 = customer.__init__('12',['1','435','2332'])
> 
> cust1 = customer('12',['1','435','2332'])

... and before that

from customer import customer

Peter


From ivan.illarionov at gmail.com  Fri May 23 03:53:09 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 07:53:09 +0000 (UTC)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
	<a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>
Message-ID: <g15t55$8qr$1@news.mtu.ru>

> The original .py will always be there but you know what, multiple python
> versions from different computers do access that one library at the same
> time.
> 
> Anyone know a possible solution ?

What about subversion or mercurial and separate copies of your library 
for each Python version?

-- Ivan


From python at bdurham.com  Thu May  1 09:31:11 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 01 May 2008 09:31:11 -0400
Subject: [ANN] Vellum 0.16: Lots Of Documentation and Watching
In-Reply-To: <ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
Message-ID: <1209648671.29817.1250878453@webmail.messagingengine.com>

Zed,

Read the first 2 chapters of your book and love it! Fun to read - I like
your writing style. I agreed with most of your premises/philosophies -
very refreshing.

I didn't find your language offensive but you might consider toning down
your review of the Awesome Window Manager :)

When do you plan on posting your next update?

Malcolm


From jarausch at igpm.rwth-aachen.de  Tue May 20 07:05:37 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 13:05:37 +0200
Subject: svg-chart 1.1 SVG Charting Library
In-Reply-To: <mailman.1312.1211124282.12834.python-announce-list@python.org>
References: <mailman.1312.1211124282.12834.python-announce-list@python.org>
Message-ID: <69fpk2F31akhjU1@mid.dfncis.de>

Jason R. Coombs wrote:
> I'm pleased to announce svg-chart 1.1, the first public release of a
> library for generating Scalable Vector Graphic (SVG) charts.
> 
>   http://sourceforge.net/projects/py-svg

This repository seems to be still empty?

Helmut.



-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From miller.paul.w at gmail.com  Mon May 26 16:16:01 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 13:16:01 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
Message-ID: <543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>

On May 26, 3:56?pm, notnorweg... at yahoo.se wrote:

> is the first example here a layer between machine and the second
> example?

My first example was intended to be C, or at least close to it.  The
second example is Python.  I consider the C snippet to be low-level,
while the corresponding Python is high-level.  There are simply fewer
extraneous details for me to worry about at the Python level, and
that's why I prefer to work with Python over C when practical.


From paul.hankin at gmail.com  Fri May  9 06:17:59 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 9 May 2008 03:17:59 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
Message-ID: <ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>

On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> and
> list2 = [0, 2, 4] # integer elements
>
> howto (I mean most simple recipe, of course) form list3 that contains
> elements from list1 with indexes from list2, i.e.

list3 = [list1[i] for i in list2]

--
Paul Hankin


From johnjsal at NOSPAMgmail.com  Tue May 20 13:19:28 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:19:28 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
Message-ID: <027e0b24$0$26906$c3e8da3@news.astraweb.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:69g605F2v4102U2 at mid.uni-berlin.de...
> After being corrected about missing the construction of a None-containing
> list, one needs of course to think about the waste of resources, as a
> possible result-list is created in any case.

Yeah, I was already aware of the list of Nones, which is why I asked. Simply 
typing the list comprehension without an assignment just *looked* wrong, 
too. 




From aahz at pythoncraft.com  Sun May 18 00:43:55 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:43:55 -0700
Subject: Sanitised Newsgroup Feeds?
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <g0oc6b$j7j$1@panix3.panix.com>

In article <fd18ede5-f697-4009-bb52-73e0c1d46e91 at 8g2000hse.googlegroups.com>,
Paddy  <paddy3118 at googlemail.com> wrote:
>
>Does anyone do a sanitised newsgroup feed? Something like what mail
>filters do for email?

My ISP (panix.com) is one of the remaining few that still honors netnews
cancels, which results in my seeing a cleaner feed than most people.
Stuff like Xah requires a killfile, though.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From arnodel at googlemail.com  Fri May  9 01:54:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 06:54:12 +0100
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <mailman.803.1210277723.12834.python-list@python.org>
Message-ID: <m2zlr03tvf.fsf@googlemail.com>

Eric Hanchrow <offby1 at blarg.net> writes:

> (This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)
>
> This seems so basic that I'm surprised that I didn't find anything
> about it in the FAQ.  (Yes, I am fairly new to Python.)
>
> Here are three tiny files:
>
> ==== mut.py ====
>
>     import system
>     from system import thing
>
>     def doit():
>         print "       thing is", thing
>
>     def do_it_slightly_differently():
>         print "system.thing is", system.thing
>
> ==== system.py ====
>     thing = "I am the original thing!!"
>
> ==== test.py ====
>     import mut
>     mut.doit()
>     mut.do_it_slightly_differently()
>     import system
>
>     system.thing = "The new improved thing"
>     mut.doit()
>     mut.do_it_slightly_differently()
>
> When I run "python test.py", I see
>
>            thing is I am the original thing!!
>     system.thing is I am the original thing!!
>            thing is I am the original thing!!
>     system.thing is The new improved thing
>
> What surprises me is that the assignment to "system.thing" in test.py
> only seems to affect the use of "system.thing" in mut.py, and not
> affect the use of just plain "thing" in that same file.  I would have
> expected my assignment to have affected both, or perhaps neither.
>
> I have no idea why these two differ.  Can someone explain?
> -- 
> Rarely do we find men who willingly engage in hard, solid
> thinking.  There is an almost universal quest for easy answers
> and half-baked solutions.  Nothing pains some people more
> than having to think.
>         -- Martin Luther King, Jr.
>         from "Strength to Love," 1963.

    import system
    from system import thing

is the same as:

    import system
    thing = system.thing

Do you expect system.thing to be rebound when you rebind thing?

HTH

-- 
Arnaud



From byte8bits at gmail.com  Wed May  7 10:08:06 2008
From: byte8bits at gmail.com (brad)
Date: Wed, 07 May 2008 10:08:06 -0400
Subject: comparing dictionaries
Message-ID: <fvsd4o$r6f$1@solaris.cc.vt.edu>

I want to compare two dicts that should have identical info just in a 
different data structure. The first dict's contents look like this. It 
is authoritative... I know for sure it has the correct key value pairs:

{'001' : '01'}

The second dict's contents are like this with a tuple instead of a 
string for the key:

{('This is one', '001'): '01'}

Pseudo Code:
for key, value in first_dict.iteritems():
   # How do I do the following line?
   if key not in second_dict or if it is, but has has the wrong value, 
then let me know



From ccy56781 at gmail.com  Sat May 31 20:01:31 2008
From: ccy56781 at gmail.com (ccy56781 at gmail.com)
Date: Sat, 31 May 2008 17:01:31 -0700 (PDT)
Subject: Conjunction List
Message-ID: <2d1bbc53-0c98-4d6e-aedd-1bf4c966410b@v26g2000prm.googlegroups.com>

http://codepad.org/MV3k10AU

I want to write like next one.

def conjunction(number=a[1],name=b[1],size=c[1]):
  flag = a[0]==b[0]==c[0]
  if flag:
    for e in zip(number,name,size):
      print e

conjunction(a,b,c)

-----------------------------------------------------------------------------------------------------
function args receive sequence element:

def somefunc(name=elm1[1], size=elm2[1], color=elm3[1]):
  for e in zip(name, size, color):
    print e,

conjunction(a,b,c)
-----------------------------------------------------------------------------------------------------

not like two case:
-----------------------------------------------------------------------------------------------------

def somefunc(elm1, elm2, elm3):
  name = elm1[1]; size = elm1[1]; color = elm1[1] # best solution?
  for e in zip(name, size, color):
    print e,

conjunction(a,b,c)
-----------------------------------------------------------------------------------------------------

def somefunc(elm1, elm2, elm3, **attr):
  for e in zip(attr['name'], attr['size'], attr['color']):
    print e,

conjunction(a,b,c, name=a[1], size=b[1], color=c[1]) # many args...
-----------------------------------------------------------------------------------------------------

What's a good approach to get the conjunction nest-list-data?


From kyosohma at gmail.com  Thu May 22 14:34:55 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 11:34:55 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <4450b2d2-ae33-4b78-8fb6-fd2deb974182@79g2000hsk.googlegroups.com>

On May 21, 3:10?pm, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

TurboGears and Django are pretty cool Python web application
frameworks. I would recommend looking at them too.

Mike


From bruno.desthuilliers at gmail.com  Wed May  7 18:21:24 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:21:24 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<7xmyn1lr66.fsf@ruckus.brouhaha.com>
Message-ID: <af3af20d-127a-4962-af3a-a1c484af04ba@8g2000hse.googlegroups.com>

On 7 mai, 23:50, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
(snip)
> Someone else suggested the heapq module, which is a good approach
> though it might be considered a little bit high-tech.  If you
> want to use sorting (conceptually simpler), you could use the
> sorted function instead of the in-place sorting function:
>
>       # return the second element of a 2-tuple.  Note how we
>       # use tuple unpacking: this is really a function of one argument
>       # (the tuple) but we specify the arg as (a,b) so the tuple
>       # is automatically unpacked on entry to the function.
>       # this is a limited form of the "pattern matching" found in
>       # languages like ML.
>       def snd((a,b)): return b

operator.itemgetter does this already

>       return sorted(dic.iteritems, key=snd, reverse=True)[-3:]

you want to actually call iteritems here !-)

        return sorted(dic.iteritems(), key=operator.itemgetter(1),
reverse=True)

Thanks for reminding me the 'key' argument to sorted anyway - I too
often tend to forget it.


From aahz at pythoncraft.com  Sat May 10 13:39:23 2008
From: aahz at pythoncraft.com (Aahz)
Date: 10 May 2008 10:39:23 -0700
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<mailman.783.1210259880.12834.python-list@python.org>
Message-ID: <g04mkb$117$1@panix3.panix.com>

In article <mailman.783.1210259880.12834.python-list at python.org>,
Gary Herron  <gherron at islandtraining.com> wrote:
>   
>With Python, you can program with a smile on your face.

+1 QOTW

>(Truly, when I found Python, programming became fun again.)

"Again"?  Looking back over the years, after I learned Python I realized
that I never really had enjoyed programming before.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From drobinow at gmail.com  Sun May 25 20:37:02 2008
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Sun, 25 May 2008 17:37:02 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
Message-ID: <ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>

On May 25, 8:26 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
> Hi, your friendly neighborhood n00b here, just wondering why on earth
> the Py3K folks want to mess with a simple thing like the "print"
> "command" (is that what it's called, a command?), turning it into
> "print()"...I mean, what's the point, exactly??  To look like a more
> "traditional" computer-language format?
>
> And what's with not supporting the so-called softspace "feature" of
> the current "print" command, where a space after a comma, like
>
> >>>print "A\n", "B"
>
> outputs
>
> >>>A\nB\n
>
> but with Py3K it will be
>
> >>>print("A\n", "B")
>
> returning
>
> >>>A\n B\n
>
> ????
>
> I was all excited to start learning the language, when suddenly I find
> out that a new version is slated for release late summer/early fall
> this year -- a new version which is not only not backwards-compatible
> with previous versions in many important ways, but even when it comes
> to a little thing like the "print" command!!
>
> What's up with that??

See  http://www.python.org/dev/peps/pep-3105/
That should answer all your questions.


From kamhung.soh at gmail.com  Tue May 27 20:32:20 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 28 May 2008 10:32:20 +1000
Subject: decorators when?
In-Reply-To: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <g1i96n$e23$1@ger.gmane.org>

David C. Ullrich wrote:
> What version added decorators (using the
> @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)
> 
> Is there a somthing such that "from __future__ import something"
> will make decorators work in 2.5.2?
> 
> 
> David C. Ullrich

See:

http://www.python.org/doc/2.4/whatsnew/whatsnew24.html

Dunno of a general way view a list of features versus releases, other 
than reading the "What's New in Python x" documents.  Maybe some 
enterprising developer can compile this list?  Hint, hint.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From eglyph at gmail.com  Mon May 19 04:39:49 2008
From: eglyph at gmail.com (eglyph at gmail.com)
Date: Mon, 19 May 2008 01:39:49 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>

> but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here.

There is nothing special in executables produced by py2exe. I mean
that the debugging strategy is as always. A good start might be in
adding logging\tracing facilities both to script and the executable.
Comparing two trace files could give you some clue.


From martin at v.loewis.de  Wed May 28 16:03:14 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 28 May 2008 22:03:14 +0200
Subject: UTF-8 and stdin/stdout?
In-Reply-To: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <483DBA82.6090908@v.loewis.de>

> 	$ cat utf8_from_stdin.py
> 	import sys
> 	data = sys.stdin.read()
> 	print "length of data =", len(data)

sys.stdin is a byte stream in Python 2, not a character stream.
To make it a character stream, do

sys.stdin = codecs.getreader("utf-8")(sys.stdin)

HTH,
Martin


From bj_666 at gmx.net  Thu May 15 09:37:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 May 2008 13:37:05 GMT
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
Message-ID: <692sk0F3090hfU1@mid.uni-berlin.de>

On Thu, 15 May 2008 06:08:35 -0700, max wrote:

> i currently have locations of the mp3s in question as strings, which
> works for parsing local files, but gives me a "No such file or
> directory" error when it tries to process URLs.  it seems terribly
> inefficient to download each mp3 just to get at that small tag data,
> and i assume there's a way to do this with file() or open() or
> something, i just can't get it to work.

You can use `urllib2.urlopen()` to open URLs as files.  But if you deal
with ID3 V1 tags you'll have to download the file anyway because those are
in the last 128 bytes of an MP3 file.

Ciao,
	Marc 'BlackJack' Rintsch


From nkarkhan at gmail.com  Sun May 25 15:42:59 2008
From: nkarkhan at gmail.com (nkarkhan)
Date: Sun, 25 May 2008 12:42:59 -0700 (PDT)
Subject: Unicode lists and join (python 2.2.3)
Message-ID: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>

Hello,
I have a list of strings, some of the strings might be unicode. I am
trying to a .join operation on the list and the .join raises a unicode
exception. I am looking for ways to get around this.
I would like to get a unicode string out of the list with all string
elements seperated by '\n'

#!/usr/bin/env python
import sys
import string

try:
    x = [u"\xeeabc2:xyz", u"abc3:123"]
    u = "\xe7abc"
    x.append("%s:%s" % ("xfasfs", u))
    x.append(u"Hello:afddfdsfa")

    y = u'\n'.join(x)
    print("Unicode Call worked!")
except Exception, err:
    print("Exception raised %s" % err)



on a related note
Why does this work with no exceptions

    x=[]
    u = "\xe7abc"
    x.append("%s:%s" % ("xfasfs", u))

and this doesnt
    x=[]
    u = "\xe7abc"
    x.append("%s:%s" % (u"xfasfs", u))


Thanks,
Nitin.




From deets at nospam.web.de  Thu May  8 14:06:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 20:06:00 +0200
Subject: Python Syntax and misspelled variable and method name checker?
In-Reply-To: <mailman.799.1210269536.12834.python-list@python.org>
References: <mailman.799.1210269536.12834.python-list@python.org>
Message-ID: <68gtogF2sujboU1@mid.uni-berlin.de>

neerashish schrieb:
> 
> Is there a good Python Syntax and mis-spelled variable and method name
> checker available.
> 
> I have been programming in python for last 6 months and misspelled variables
> and method names have been bane of my python life. 
> 
> In complied languages, compiler checks for these mistakes. I come from Java
> , C++ background. 
> 
> I use komodo as editor on mac. I use python 2.4
> 
> Please suggest some good tool and utilities.

Try pylint, pychecker and the commercial version of pydev.

Diez


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 11:59:01 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 17:59:01 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <4829bac3$0$28389$426a74cc@news.free.fr>

wxPythoner at gmail.com a ?crit :
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.
> 
> How is with this issue in Python 3.0? Is it fixed? Does Python handle
> this things properly now?

This is not an issue and is already properly handled. Don't use identity 
test when you want an equality test, period.


From nc at iname.com  Thu May 22 01:28:32 2008
From: nc at iname.com (NC)
Date: Wed, 21 May 2008 22:28:32 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>

On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
> Yet, I want learn the guts of it instead of just booting up some
> wordwank or whatever.

Here's a simple computation to consider...  WordPress' codebase is
approximately a megabyte of PHP code and megabyte of JavaScript code.
Assuming that the average line of that code is 50 characters long, you
are looking at 20,000 lines of code in PHP and as many in JavaScript.
Based on the notion that the average developer out there writes 100
lines a day, either you're in for a two-year project or your product
is going to have seriously reduced functionality compared to something
that's been freely available for years.  What's your choice?

> Then I run across that blog, Coding Horror, and start reading
> articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html

You should read what some computer scientists write about SQL... :)

> Now what?

Nothing.  Everyone is entitled to their opinion.  You are free to form
your own.

> I've taken basic basic and basic C, but am barely literate
> in html.

Maybe that (and some JavaScript) is something to work on first before
delving into server-side programming?

> Well, that's my actual question, then.  Is php really so bad
> I'm just wasting my time?  Or is it really the quickest way
> to blog functionality?

The quickest way to blog functionality is an account on a blogging
service...  :)

> Would I be better served in the long run learning python, which
> claims to be easy as pie to learn/program (still looks hard to
> me).  I admit I'm no code geek.  But, I'm not completely brain
> dead, either, and I need something to keep my geezer brain
> sparking.  What say ye?

If the purpose is to keep the brain sparking, it doesn't matter what
you learn as long as you're enjoying the process.  You might as well
take up Japanese while you're at it...

Cheers,
NC


From Ken.Barclay at schwab.com  Sun May  4 23:31:45 2008
From: Ken.Barclay at schwab.com (Barclay, Ken)
Date: Sun, 4 May 2008 20:31:45 -0700
Subject: Script using generators produces different results when invoked as a
	CGI 
Message-ID: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>

Hello,
 
I attended David Beazley's awe-inspiring tutorial on the use of
generators in systems programming:
 
http://www.dabeaz.com/generators/
<BLOCKED::http://www.dabeaz.com/generators/> 
 
I used his approach to write a web tool that can display search results
from different log files. But the resulting script produced fewer
results when invoked as CGI than it did when run from the command line,
and I can't figure out why.
 
He showed how to 'pipeline' generators together in a form of declarative
programming. For example, put the following generators together to grep
lines out of a set of files:
 
# Generate a list of files
lognames = gen_find("*.bz2","/tmp/bz2_alldata/pa_new")
# Yield a sequence of file objects that have been suitably opened
logfiles = gen_open(lognames)
# Concatenate multiple generators into a single sequence
loglines = gen_cat(logfiles)
# Grep a sequence of lines that match a re pattern
searchlines = gen_grep(r'fried',loglines)
 
The functions are only a few lines each:

def gen_open(filenames):
    for name in filenames:
        if name.endswith(".bz2"):
            yield bz2.BZ2File(name)

def gen_cat(sources):
    for s in sources:
        for item in s:
            yield item
 
import re
def gen_grep(pat,lines):
    patc = re.compile(pat)
    for line in lines:
        if patc.search(line): yield line
 
Since they're generators, processing the data doesn't start until you
kick off the iteration on the final generator.
 
Problem: For small sets of files this works great. But when I had 19Meg
worth of log files in a test directory, the script would return the
correct number of matching lines (288) only when it was invoked directly
from the command line. When invoked from a CGI script, it returns 220
lines instead (written to the "tempfile", below.) I don't know where
that limit is coming from. If more logs are added to the test directory,
the result is always the same 220 lines.
 
I'm using Python 2.5.1 on Red Hat Linux 3.2.3-47. Below is the whole
script I was testing with. It's using hard-coded values in place of ones
I'll be getting from an HTML form (generated with HTMLgen) presented to
the user.
 
There are no exceptions or errors of any kind. Any pointers on what
might be happening here would be welcome!
 
Thanks
Ken
 
#!/usr/local/bin/python
 
import tempfile
from genfind import  gen_find
from genopen import  gen_open
from gencat  import  gen_cat
from gengrep import  gen_grep
 
tf = tempfile.mkstemp()
tmpfile = open(tf[1],'w')
 
lognames = gen_find("*.bz2","/tmp/bz2_alldata/pa_new")
logfiles = gen_open(lognames)
loglines = gen_cat(logfiles)
 
searchlines = gen_grep(r'fried',loglines)
for line in searchlines:
    print >> tmpfile, line,
tmpfile.close()

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From jschroed at gmail.com  Sat May 17 15:49:54 2008
From: jschroed at gmail.com (John Schroeder)
Date: Sat, 17 May 2008 12:49:54 -0700
Subject: waiting on an event blocks all signals
In-Reply-To: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
Message-ID: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>

^C only kills the main thread.  Use Control-Break to kill all threads.

On Sat, May 17, 2008 at 12:32 PM, alan <alangrow at gmail.com> wrote:

> This ignores CTRL-C on every platform I've tested:
>
> python -c "import threading; threading.Event().wait()"
> ^C^C^C^C
>
> It looks to me like all signals are masked before entering wait(). Can
> someone familiar with the internals explain and/or justify this
> behavior? Thanks,
>
> -Alan
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From p.f.moore at gmail.com  Thu May 29 07:22:45 2008
From: p.f.moore at gmail.com (Paul Moore)
Date: Thu, 29 May 2008 12:22:45 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
	<DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
Message-ID: <79990c6b0805290422g5b61f3c5l65034ee6e5798178@mail.gmail.com>

On 29/05/2008, Dahlstrom, Roger <rdahlstrom at directedge.com> wrote:
> I'd try looking at memcached (http://www.danga.com/memcached/apis.html).
>  No hacking or reimplementation of the interpreter would be necessary, and
> there's a Python api available.  I haven't used it for anything production related,
> but I have played with it a bit, and it's fast and stable.

Is memcached available for Windows, then? I've heard nice things about
it, but thought it was Unix-only.

Paul.


From Scott.Daniels at Acm.Org  Sun May 25 19:02:06 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 16:02:06 -0700
Subject: Getting a set of lambda functions
In-Reply-To: <mailman.1583.1211754595.12834.python-list@python.org>
References: <g1bjcj$u3m$1@aioe.org>	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
	<mailman.1583.1211754595.12834.python-list@python.org>
Message-ID: <W72dnaRymtZIcKTVnZ2dnUVZ_jydnZ2d@pdx.net>

Denis Kasak wrote:
...
>>>> spam = []
>>>> for i in range(10):
> ...   spam.append(lambda: i)
>>>> spam[0]()
> 9
>>>> spam[1]()
> 9
> 
> Manually creating the lambdas and appending them to a list works as
> expected, naturally; I don't see a good reason why it wouldn't work
> with a loop. Am I missing something?

Yes, you are missing something: binding time.  your anonymous function
returns the value of "i" in the enclosing scope _at_the_time_of_
_the function's_execution_.  If you follow your previous example with
'del i' and then execute any of your spam functions, you'll get an
"NameError: global name 'i' is not defined".

There are a couple of ways to slve your problem:
(1) use default args to do the binding at the function definition time.
     for i in range(10):
         spam.append(lambda arg=i: arg)
The lambda expression is normally spelled "lambda i=i: i)", but if you
don't know the idiom, I find the "i=i" part confuses people.

(2) Use something like functools.partial. if you are simply binding
     different args to the "same" function:

     import functools

     def thefunction(x):
         return x * 2

     spam = [functools.partial(thefunction, i) for i in range(10)]

--Scott David Daniels
Scott.Daniels at Acm.Org


From danb_83 at yahoo.com  Thu May  8 22:40:33 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 19:40:33 -0700 (PDT)
Subject: How can I add spaces where ever I have capital letters?
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com> 
	<mailman.829.1210298651.12834.python-list@python.org>
Message-ID: <55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>

> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would like
> > to print out my CamelCase classes as titles.
>
> > I would like it to do this:
>
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
>
> > Anyone know any easy way to do this?  Thanks.

On May 8, 9:04?pm, "Eric Wertman" <ewert... at gmail.com> wrote:
> Something like this. ?I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
> ? ? ? ? return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr = ?re.sub('[A-Z]',addspace,strng)
>
> print newstr.strip()

Yes, there are other ways to do it.  If, for example, you like one-
liners but not regexps:

def add_spaces(text):
    return text[:1] + ''.join((' ' + char if char.isupper() else char)
for char in text[1:])


From deets at nospam.web.de  Tue May 13 16:18:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 22:18:25 +0200
Subject: Why can't I import this?
In-Reply-To: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
Message-ID: <68ubcuF2ur7lkU2@mid.uni-berlin.de>

John Henry schrieb:
> Hi list,
> 
> I can't understand this.  The following import statement works fine:
> 
>     from PythonCard.templates.dialogs import runOptionsDialog
> 
> but this one fails:
> 
>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
> 
> I've checked and rechecked to make sure that the spellings are proper
> and that the tools, the codeEditor directory, and codeEditor.py, and
> the class CodeEditor all exists and yet idle keep complaining that it
> can't import from PythonCard.tools.

How do these complaints *look* - we can't read your mind nor your 
screen, as you might imagine....

> What's going on?  (Running Python2.5 under WinXP).

What do you think is more probable - pythons import-mechanism, the 
foundation of nearly all libraries, is broken - or you make a mistake?

Diez


From Scott.Daniels at Acm.Org  Tue May 20 21:08:00 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 20 May 2008 18:08:00 -0700
Subject: Removing Space and "-" from a string
In-Reply-To: <mailman.1387.1211301238.12834.python-list@python.org>
References: <mailman.1387.1211301238.12834.python-list@python.org>
Message-ID: <tt6dnfd1Ca197q7VnZ2dnUVZ_hadnZ2d@pdx.net>

python at bdurham.com wrote:
> Shakir,
> 
>> I have thousands of records in MS Access database table, which records I
>> am fetching using python script. [A] columns has strings like '8 58-2155-58'
>> Desired output: '858215558'
>>>> input = '8 58-2155-58'
>>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>>> output
> '858215558'

If you are planning to do a lot of strings:

     identity_trans = ''.join(chr(x) for x in range(256))

Then you can do simply:
     input = '8 58-2155-58'
     output = input.translate(identity_trans, ' -')

--Scott David Daniels
Scott.Daniels at Acm.Org


From jcd at sdf.lonestar.org  Thu May  8 07:02:52 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 08 May 2008 07:02:52 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805080912.29438.onsen-neko@gmx.net>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
	<1210189736.4595.2.camel@aalcdl07.lib.unc.edu>
	<200805080912.29438.onsen-neko@gmx.net>
Message-ID: <1210244572.6529.5.camel@jcd-desktop>

On Thu, 2008-05-08 at 09:12 +0200, Daniel Marcel Eichler wrote:
> Am Mittwoch 07 Mai 2008 21:48:56 schrieben Sie:
> 
> > > That's the point. Interfaces garantee that a duck is a duck, an not
> > > only a chicken that quack.
> > Which, in spite of your rhetorical flourish, is the exact opposite of
> > duck typing.  Duck typing means that if you're looking for quacking
> > behavior, and you find a quacking chicken, it's close enough.
> 
> I didn't said that interfaces are a kind of duck-typing. In fact it was 
> the exact opposite.
> 
> > Sometimes you need that kind of rigor, and you can get it as easily
> > as
> 
> And sometimes you need more. So what?
> 

More rigor than Zope's interfaces offer?  That's new information to me.
Perhaps you should stop being argumentative for a moment, and explain
exactly what it is you're looking for and why Zope interfaces don't fit
the bill.





From sajmikins at gmail.com  Wed May 21 01:14:37 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Tue, 20 May 2008 22:14:37 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
Message-ID: <490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>

On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
>
>
> > You don't need all those conditionals. A set differs from a list
> > precisely in the fact that each element is unique. And since the
> > function is expecting "s" to be an iterable object, it can be
> > constructed even without a for loop:
>
> > def compress(s):
> >     return list(set(s))
>
> > That does the trick.
>
> Only if order does not need to be maintained.  list(set(s)) will not
> necessarily keep the unique characters in the order they are seen.
> We'll have to check with the OP to see if this is important (I just
> assumed that it was because of the use of list comps).
>
> -- Paul


If order is important, you can use sorted() instead of list() like so:

def compress(s):
    new = sorted(set(s), key=s.index)
    return return ''.join(new)

~Simon


From bignose+hates-spam at benfinney.id.au  Fri May  2 10:37:45 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:37:45 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
Message-ID: <87fxt0zs92.fsf@benfinney.id.au>

Thorsten Kampe <thorsten at thorstenkampe.de> writes:

> * Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> > The OP was asking why people prefer on over the other. My answer
> > is that I prefer specifying "give me the default OS Python"
> > because anything not installed by the OS is to non-standardised
> > for me to worry about.
> > 
> > Others may prefer something different, but then they get to wear
> > whatever problems occur as a result of that choice. I continue to
> > be bemused by that preference, and nothing that I've seen so far
> > in this thread illuminates the issue more.
> 
> You're missing the point. Apart from the really dubious terms you
> use ("OS installable package"), using env in the first line has
> exactly the effect to use the default path of Python (which is the
> first entry in your path)

No, because it's quite common for the PATH variable to have
'/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.

If the system has a sysadmin-installed '/usr/local/bin/python'
installed as well as the OS-installed '/usr/bin/python', then the two
shebang options the OP raised will behave differently on such a
system. This seems to be quite the point of the discussion.

-- 
 \          "Time's fun when you're having flies."  -- Kermit the Frog |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From castironpi at gmail.com  Sat May 17 05:57:08 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 02:57:08 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>

Full day later, I think it, to emphasize state, would prioritize
context.  The reason for the huge ramble was, believe it or not,
namespace conflict... as though any other states around here might
nose in.  And thanks to 'inhahe' for coming back with the
question.  ...Which would explain next move to 'prioritize context'.
Context is a high priority for people.

I'm proposing to start on one on a computer.  The first things a
computer 'knows' are the boot, keyboard, & mouse.  Yet on another
scale, the first things it knows are BIOS, file system, and OS.  On
still another, the only thing it knows are interruptions.  Knowledge
is important to context.  (The scales are ram on disk on, ram on disk
off, and ram off, which may tell of the currency they and their power
are bought with.  Thence, we should be getting different values for
lengths of time.)

(Furthermore, we're all on different longitudes -and- latitudes.)

Context comes from motion, perception, and composite perception
(reperception e.a.o. memory).  There is some reason to believe that
motion and sight are different senses, perhaps so with stationary
sound (gatcha) and mobile sound too.  Do you go deaf of a tone after
prolonged duration?  That makes computers valuable commodities*: they
have a symbolic interface, which no other unlive objects have.  They
have both mouse and keyboard.

*I'm sure there is a precision to wants: what magnitude of what types
of action a person wants from a day and for a time-- what energy
states they go to and from (note phone on come to and come from.)

Therefore, context should originate in mouse and keyboard.

Humans have symbolic know-how: knowledge of how to convey intent
digitally, though it may be there is no interpolation of 'intent per
mouse-or-key', even though people are prone to empathize with faces.
However, if you start with a 'me' and a 'no', you can get pretty
logical.

Intent per mouse-and-key isn't necessarily scalar, three-dimensional,
or rationally dimensional (?), though they do have magnitudes per mass
and volume.  The contingent of 'rationally dimensional' is having or
beknowing/benouncing an orthonormal basis.  Incidentally,
'''orthography of a language specifies the correct way of using a
specific writing system to write the language. .. Orthography is
derived from Greek ????? orth?s ("correct") and ??????? gr?phein ("to
write").''' - wikipedia.

Further incidentally, context and state may have more important in
common than priority and price: privacy and safety are involved ex
hypothesi.  Incidentally = ...

It is not clear that the first (cheapest best) human-computer language
is a computer language, though if two were orthonormal in comparison
to life, Python's fine.  Not my first.

In privacy concerns, it is not clear that duals aren't primitives to
humans.  What's a brain primitive?  Lol: what is a primitive brain?




On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
>
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?- Hide quoted text -
>
> - Show quoted text -



From yves at zioup.com  Wed May  7 23:34:53 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 08 May 2008 03:34:53 GMT
Subject: slicing lists
In-Reply-To: <mailman.731.1210209219.12834.python-list@python.org>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <xxuUj.250118$pM4.15725@pd7urf1no>

Miles wrote:
> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>  >  > Is there a way to do:
>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>  >  > x[0,2:6]
>  >  >
>  >  > That would return:
>  >  > [0, 3, 4, 5, 6]

Arg... Yes, this is a typo, I meant:
[1, 3, 4, 5, 6]

>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
> 
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
>  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)

Yes, exactly.

> 
>  This isn't incredibly efficient, but it does what you want (I think):
> 
>  from itertools import chain
> 
>  class multisliceable(list):
>   def __getitem__(self, slices):
>     if isinstance(slices, (slice, int, long)):
>       return list.__getitem__(self, slices)
>     else:
>       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
>                           else [list.__getitem__(self, s)] for s in slices]))
> 
>  p = open('/etc/passwd')
>  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]

So would it be a worthy addition to python, to add it right in the core of 
the language, and hopefully in an efficient manner ?

That would certainly help some type of list comprehensions, making them more 
readable, and hopefully more readable (running split once instead of twice, 
or how many number of time you need it). The passwd example is just one 
example I ran into, but I can see running in this problem a lot with more 
complex cases. Right now I solve the passwd pb with:

p = file('/etc/passwd').readlines()
r = [ e.strip().split(':') for e in p ]
s = [  e[0:1] + e[2:]   for e in r ]


Or:

p = file('/etc/passwd').readlines()
s = [  e.strip().split(':')[0:1] + e.strip().split(':')[2:]   for e in p ]

In the first case we're looping twice (two list comprehension), in the 
second case we're running the split twice on every element of p.


Yves.
http://www.SollerS.ca





From marco at sferacarta.com  Tue May 13 05:43:13 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 11:43:13 +0200
Subject: Some comparison operators gone in Python 3.0?
In-Reply-To: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
Message-ID: <SodWj.41692$o06.22997@tornado.fastwebnet.it>

wxPythoner at gmail.com wrote:

> Is that true that this comparison operators are gone in Python 3.0:
> 
> <    (is less than)
>>    (is greater than)
> <= (is less than or equals)
>> = (is greater than or equals)
> 
> Is it true?

Nope.


From ethan.mallove at sun.com  Tue May 20 11:27:43 2008
From: ethan.mallove at sun.com (emallove)
Date: Tue, 20 May 2008 08:27:43 -0700 (PDT)
Subject: Python in non-standard location erring with "No module named _sha256"
Message-ID: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>

I'm running into the below "No modules named _sha256" issue, with a
python installed in a non-standard location.

$ python
Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
[GCC 3.3.3 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import md5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
    from hashlib import md5
  File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
<module>
    sha224 = __get_builtin_constructor('sha224')
  File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
__get_builtin_constructor
    import _sha256
ImportError: No module named _sha256

Googling around, this seems to be related to OpenSSL being in a non-
standard location? I've edited the Setup file to set $(SSL) to the non-
standard location. Now Python compiles fine, but I still get the above
error.

Any help would be much appreciated.

Thanks,
Ethan


From waldemar.osuch at gmail.com  Sat May  3 14:51:58 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Sat, 03 May 2008 18:51:58 GMT
Subject: Python and SOAP status
In-Reply-To: <bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
	<L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>
	<bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>
Message-ID: <iv2Tj.112482$Cj7.79520@pd7urf2no>

Jeff wrote:
> Twisted has SOAP support.
yes but it is based on no longer actively maintained SOAPpy.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 05:59:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 11:59:54 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <0DFYj.28609$ie5.21801@newsfe05.ams2>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
	<0DFYj.28609$ie5.21801@newsfe05.ams2>
Message-ID: <4833f28d$0$3737$426a74cc@news.free.fr>

Roel Schroeven a ?crit :
> Wow this resulted in far more reactions than I had expected ...
> 
> bruno.desthuilliers at gmail.com schreef:
>> On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
>> wrote:
>>> Bruno Desthuilliers schreef:
>>>
>>>> 1/ being interpreted or compiled (for whatever definition of these
>>>> terms) is not a property of a language, but a property of an
>>>> implementation of a language.
>>>> 2/ actually, all known Python implementations compile to byte-code.
>>> You keep saying that, and in theory you're right.
>>
>> "In theory" ??? Heck, both points above are mere facts. Well, I may
>> accept that the 2nd one is a bit overgeneralized, since IIRC there's
>> an experimental Python to javascript "compiler" in Pypy, but...
>>
>>>  But I'm still inclined to disagree with it,  since the practical 
>>> reality is different.
>>
>> Do you mean that how source code written in a language (that is : a
>> grammar  + a syntax) finally become a set of instructions executed by
>> a CPU depends on the language (I repeat : a grammer + a syntax), and
>> not on a piece of software turning the source code into something that
>> can actually be executed by the CPU ?
> 
> No, that's not what I said; what I said is that some languages where 
> designed with in the back of the head the idea that they were going to 
> be compiled to native code, others to be interpreted, and others to be 
> compiled to byte code.

I'd put it more simply : some languages were designed with low-level 
access and raw performances in mind, and some were'nt. Roel, I'm totally 
aware of these issues - on which you're of course right -, but that 
doesn't change the fact that a language and it's implementation *are* 
distinct things.

(snip)

> So yes, the transformation method from source code to something that the 
> CPU understands depends on your tools.

And you can have different tools using different solutions for a same 
language.

> But if you want to get work done, 
> the most common method by far for C is to use a toolchain that compiles 
> to native code and for Python a byte code compiler + virtual machine. 
> With possibly a JIT compiler, that's true.


>>> Python is
>>> indeed compiled to byte code, but if you compare that byte code with
>>> assembly code you'll see that there's a whole world of difference
>>> between the two,
>>
>> Obviously, yes - at least for all assembly language I've seen so far.
>> But whoever said otherwise ?
> 
> Whenever someone says that Python is interpreted, you respond saying 
> that that's not true, since it's compiled to byte code.

Whenever someone says that Python is interpreted, I respond saying that 
being interpeted or compiled is not a feature of a language, and that 
CPython compiles to byte-code.

> Correct of 
> course,

And that's the point : being correct.

> but somehow it appears to me that you imply

I don't imply anything - except eventually that the person I'm 
correcting should know better.

> that that makes 
> Python closer to a C-like language than to an interpreted language,

Strange enough, no one calls Java or C# 'interpreted languages', while 
they (or, to be more exact, their reference implementations) both  use 
the same byte-code/VM scheme[1]. You know, the commonly accepted 
definition of "byte-code" is "something that is going to be passed to a 
virtual machine", not "native binary executable code", so I don't think 
this could be really misleading.

Now what you don't seem to get is the difference between pure 
interpretation - where each and every statement is parsed and 
interpreted again and again - and intermediate byte-code compilation. 
Believe me, *this* can make a huge difference wrt/ performances.

Also and FWIW, there are quite a lot of "C-like languages" that are - in 
their only or reference implementation - interpreted or compiled to 
byte-code. For a definition of "C-like" being "close to the C language's 
syntax and grammar" !-)

[1] Oh, and before some nut-case jump in : no, this doesn't imply that 
the CPython VM is 'equivalent' to Sun's Java VM or MS CLI/.NET VM.

> and 
> that's not correct (IMO). If that's just a misinterpretation by me, I 
> apologize.
> 
>>>  largely because of the dynamical nature of Python. Fact
>>> is that Python was designed from the start to run on a virtual machine,
>>> not on the native hardware.
>>
>> Nope. The facts are that
>> 1/ Python (the language) has *not* been designed with ease of
>> implementation of an optimizing native-code compiler in mind,  and
>> 2/ CPython (the first and reference implementation) has been designed
>> to use a byte-code + VM scheme
> 
> Isn't that more or less the same as what I said?

Can't you tell the difference ???

> Maybe I don't make enough distinction between Python the language and 
> CPython the implementation,  but Python development does happen on the
> CPython implementation (Python 3.0 alpha releases are CPython releases, 
> for example).
> 
>>
>>> C OTOH was designed to be compiled to assembly code (or directly to
>>> machine code)
>>
>> Note quite. C has been designed to make it as easy as possible to
>> write either a C to assembly or C to native binary code compiler.
> 
> I find it hard to believe that during the development of C Dennis 
> Ritchie was considering any other mode of operation than compilation to 
> assembly or machine code. I might be wrong of course.

I'm not talking about "development" (which implies implementation), but 
about the design of the *language*. Roel, can you define "language" ?

>>> and as a result there are no (or virtually) no
>>> implementations that interpret C or compile it to bytecode.
>>
>> There's at least one (possibly incomplete) C interpreter.
> 
> I'd like to call that the exception that confirms the rule.

Which rule ?

Oh, and yes - as a couple persons pointed out, there are actually more 
than "one (possibly incomplete) C interpreter" - there are  also the 
llvm byte-code compiler+VM and the MS CLI C/C++ compiler.

>> There's a very naive belief we saw every here and then here, which is
>> that "Python would be faster if it was compiled to native code". The
>> point is that, given Python's (as a language) extrem dynamism,
>> compiling it to native code wouldn't buy you much in terms of raw
>> performances. The problem is not with writing a native-code
>> compiler[1}, but with writing an *optimising* native-code compiler.
> 
> I admit I'm guilty of that belief. I know it's true what you say, but I 
>  do have the more-or-less unconscious reflex 'compiled to native code == 
> fast'.

So make a simple test : write a very Q&D cat-like program in Python, C 
and Perl, and benchmark the three implementations. The results might 
surprise you.


>> I'm just getting fed up with
>> this "Python is an interpreted and therefore slow language" non-
>> sense.  Python is a language, and as such is neither slow nor fast nor
>> interpreted nor compiled nor <insert any implementation related stuff
>> here>. And while CPython is not blazingly fast for computation-heavy
>> stuff, it's not because it is "interpreted" - which it is not for a
>> strict definition of "interpreted", but anyway...  - but because
>> *optimizing* execution of an highly dynamic language is nothing,
>> well,  err, trivial.
> 
> So you are saying that CPython is relatively slow because Python is a 
> highly dynamic language.

And therefore difficult to optimize.

> I know that CPython is not Python and Python is 
> not CPython, but there is a very strong association between the two

Indeed. CPython is the reference implementation of Python. Like GCC is 
the reference implementation of C on linux platforms. etc...

> and 
> therefore I think it's not really that much wrong to simplify that to 
> 'Python is slow because it is a highly dynamic language'

It is definitively wrong. How could a *language* be 'slow' or 'fast' ?

> (until proven 
> wrong by PyPy or another fast implementation'.

You know, Common Lisp is also an highly dynamic language, and there are 
now some optimizing native-code Common Lisp compilers that generate very 
efficient binary code. It only tooks about 30 years and way more 
ressources than CPython ever had to get there...



From wizzardx at gmail.com  Mon May 26 06:52:35 2008
From: wizzardx at gmail.com (David)
Date: Mon, 26 May 2008 12:52:35 +0200
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>
Message-ID: <18c1e6480805260352y6e3e7829ja0f81ece27133e6c@mail.gmail.com>

Python is getting some 'unclean' features like function annotations[1]
and abstract base classes[2], so it is possible that it will get more
explicit support for private class attributes at some point, if there
is enough demand for it.

[1]http://www.python.org/dev/peps/pep-3107/
[2]http://www.python.org/dev/peps/pep-3119/

David.


From mnikhil at gmail.com  Tue May 20 14:01:15 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:31:15 +0530
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
	<g0v2vs$38b$01$1@news.t-online.com>
Message-ID: <483311EB.1040307@gmail.com>

Peter Otten wrote:
> Nikhil wrote:
> 
>> I have recently written a small module. When I import the module, I
>> always get the error
>>
>>
>> only when I do
>>
>>  >>> from local.my.module import *
>>
>> --
>> Traceback (most recent call last):
>>    File "<stdin>", line 1, in <module>
>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>> ---
>>
>>
>> but when I do the below, I do not get any error.
>>
>> --
>>  >> import local.my.module
>>  >>
>> --
>>
>> Any ideas on what could be wrong?
> 
> Are you abusing the __all__ attribute?
> 
> $ cat tmp.py
> __all__ = ['/xyz/py/file']
> 
> $ python -c "from tmp import *"
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> 
> Peter

Hi Peter,

Yes, I am. Is there any reason not to?

basically, since this is implemented in the module, I have to export it 
since the caller to the function in the module is responsible for 
ensuring he has enough proper permissions to read the file.

Thanks,
Nikhil


From ivan.illarionov at gmail.com  Sat May 17 06:35:14 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 10:35:14 +0000 (UTC)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <g0mcd2$2qk0$2@news.mtu.ru>

On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:

> Full day later, I think it, to emphasize state, would prioritize
> context.  The reason for the huge ramble was, believe it or not,
> namespace conflict... as though any other states around here might nose
> in.  And thanks to 'inhahe' for coming back with the question.  ...Which
> would explain next move to 'prioritize context'. Context is a high
> priority for people.
> 
> I'm proposing to start on one on a computer.  The first things a
> computer 'knows' are the boot, keyboard, & mouse.  Yet on another scale,
> the first things it knows are BIOS, file system, and OS.  On still
> another, the only thing it knows are interruptions.  Knowledge is
> important to context.  (The scales are ram on disk on, ram on disk off,
> and ram off, which may tell of the currency they and their power are
> bought with.  Thence, we should be getting different values for lengths
> of time.)
> 
> (Furthermore, we're all on different longitudes -and- latitudes.)
> 
> Context comes from motion, perception, and composite perception
> (reperception e.a.o. memory).  There is some reason to believe that
> motion and sight are different senses, perhaps so with stationary sound
> (gatcha) and mobile sound too.  Do you go deaf of a tone after prolonged
> duration?  That makes computers valuable commodities*: they have a
> symbolic interface, which no other unlive objects have.  They have both
> mouse and keyboard.
> 
> *I'm sure there is a precision to wants: what magnitude of what types of
> action a person wants from a day and for a time-- what energy states
> they go to and from (note phone on come to and come from.)
> 
> Therefore, context should originate in mouse and keyboard.
> 
> Humans have symbolic know-how: knowledge of how to convey intent
> digitally, though it may be there is no interpolation of 'intent per
> mouse-or-key', even though people are prone to empathize with faces.
> However, if you start with a 'me' and a 'no', you can get pretty
> logical.
> 
> Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> rationally dimensional (?), though they do have magnitudes per mass and
> volume.  The contingent of 'rationally dimensional' is having or
> beknowing/benouncing an orthonormal basis.  Incidentally, '''orthography
> of a language specifies the correct way of using a specific writing
> system to write the language. .. Orthography is derived from Greek ?????
> orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
> 
> Further incidentally, context and state may have more important in
> common than priority and price: privacy and safety are involved ex
> hypothesi.  Incidentally = ...
> 
> It is not clear that the first (cheapest best) human-computer language
> is a computer language, though if two were orthonormal in comparison to
> life, Python's fine.  Not my first.
> 
> In privacy concerns, it is not clear that duals aren't primitives to
> humans.  What's a brain primitive?  Lol: what is a primitive brain?
> 
> 
> 
> 
> On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
>> I'm not an expert in this but what does it mean to emphasize state? ?It
>> seems the opposite of that would be a) functional programming, and b)
>> passing parameters instead of using global or relatively local
>> variables. And maybe c) coroutines (generators as implemented in
>> Python), although perhaps coroutines could be said to emphasize state
>> inasmuch as they go out of their way to capture, objectify and reuse it
>> (Stackless' microthreads, even moreso). ?And Python seems to be
>> well-noted for implementing some functional programming methodology,
>> and as for passing parameters it's just as object-oriented as the rest
>> of them.
>>
>> But as I said, I'm not an expert, so let me know if I've gone astray..
>>
>>
>>
>> > I have a proposition to ask you all: Python emphasizes state. ?Is it
>> > true?- Hide quoted text -
>>
>> - Show quoted text -

Castironpi,

I love you! You remind me of all the kittens and puuppies I had when I 
was a child.

I #define this. Hope your database could give us something funny again.

-- Ivan


From skanemupp at yahoo.se  Thu May 15 12:12:07 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:12:07 -0700 (PDT)
Subject: file open/read/name etc, not working
Message-ID: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>

import os

print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
d.readline()

returns true in the shell but prints no text even though the document
contains text.

d.name returns nothing, d.name() raises an error.


From google at mrabarnett.plus.com  Fri May 16 21:21:33 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 16 May 2008 18:21:33 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <8e840aa6-71c7-4849-b503-f9289944541d@c58g2000hsc.googlegroups.com>

On May 16, 10:22 pm, "Dan Upton" <up... at virginia.edu> wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time.  If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated.  For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated).  Roughly:
>
> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
>
> The problem:
>
> RuntimeError: dictionary changed size during iteration
>
> So, the question is: is there a way around this?  I know that I can
> just /not/ delete from the dictionary and keep polling each time
> around, but that seems sloppy and like it could keep lots of memory
> around that I don't need, since presumably the dictionary holding a
> reference to the Popen object means the garbage collector could never
> reclaim it.  Is the only reasonable solution to do something like
> append all of those pids to a list, and then after I've iterated over
> the dictionary, iterate over the list of pids to delete?
>
> (Also, from the implementation side, is there a reason the dictionary
> iterator can't deal with that?  If I was deleting from in front of the
> iterator, maybe, but since I'm deleting from behind it...)
>
Why do you need a counter? len(procs_dict) will tell you how many are
in the dictionary.

You can rebuild the dictionary, excluding those that are no longer
active, with:

procs_dict = dict((id, process) for id, process in
procs_dict.iteritems() if process.poll() != None)

and then start N - len(procs_dict) new processes.


From mcknight0219 at gmail.com  Tue May 13 03:01:58 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Tue, 13 May 2008 00:01:58 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<g0b19h$2ne$1@news.mtu.ru>
Message-ID: <418dfa26-ccf1-476d-b7db-492f57cb0679@u36g2000prf.googlegroups.com>

On May 13, 11:18 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> On Mon, 12 May 2008 19:19:05 -0700, Jimmy wrote:
> > Well, i know it may be a little non-python thing, however, I can think
> > of no place better to post this question :)
>
> > can anyone tell me, in python, how to obtain some information of a
> > running program?
> > paticularly, if i am playing some music in audacious or other media
> > player, how can i get the the name and some other info of current
> > playing song? It seems that audicious doesn't output on run-time
>
> In case of Audatious running on X11 all you need is Python X libraryhttp://python-xlib.sourceforge.net/
>
> And something like:
>
> from Xlib import display
>
> dpy = display.Display()
> root = dpy.screen().root
>
> NET_WM_NAME = dpy.intern_atom('_NET_WM_NAME')
> UTF8_STRING = dpy.intern_atom('UTF8_STRING')
>
> for win in root.query_tree().children:
>     try:
>         window_title = win.get_full_property(NET_WM_NAME,
> UTF8_STRING).value
>     except AttributeError:
>         continue
>     if window_title.endswith('Audacious'):
>         song = window_title.split(' - ')[:-1]
>         if song:
>             print song
>
> -- Ivan

 Thanks!
I also found a thing called 'audacious announcer' which can output
detail information of the playing track.
actually I'm working on a small program to display lyrics while
playing music in media player.


From rtw at freenet.co.uk  Sun May 18 16:37:19 2008
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sun, 18 May 2008 15:37:19 -0500
Subject: is there a bug in urlunparse/urlunsplit
References: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>
Message-ID: <Xns9AA2DC360FF5DrtwfreenetREMOVEcouk@216.196.109.145>

Alex wrote in news:09764c57-03ce-4ccb-a26d-
e851899dcc7c at a23g2000hsc.googlegroups.com in comp.lang.python:

> Hi all.
> 
> Is there a bug in the urlunparse/urlunsplit functions?
> Look at this fragment (I know is quite silly):
> 
> urlunparse(urlparse('www.example.org','http'))
> ---> 'http:///www.example.org'
>            ^^^^^

Try these 3:

  urlparse('www.example.org','http')
  urlparse('http://www.example.org','http')
  urlparse('//www.example.org','http')

The 1st returns www.example.org as the path part
with the other 2 its the location (domain) part.

Although it may not be immediately obvious that the result 
is correct, consider the follwing html fragment:

  <img src="aaa.gif">
  <img stc="http://anothersite.com/bbb.gif">

If you were to use urlparse to parse the src attributes
you would want:

  ( '', '', 'aaa.gif', '','','' )
  ( 'http', 'anothersite.com', '/bbb.gif', '','','' )


Which AIUI is what urlparse does.


Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From Tymoteusz.Jankowski at gmail.com  Wed May 28 02:00:59 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Tue, 27 May 2008 23:00:59 -0700 (PDT)
Subject: confused by HTMLParser class
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <19072836-23e5-4ff0-98ca-508d1f91bb3f@k30g2000hse.googlegroups.com>

On May 28, 3:20?am, globalrev <skanem... at yahoo.se> wrote:
> tried all kinds of combos to get this to work.
>
> http://docs.python.org/lib/module-HTMLParser.html
>
> from HTMLParser import HTMLParser
>
> class MyHTMLParser(HTMLParser):
>
> ? ? def handle_starttag(self, tag, attrs):
> ? ? ? ? print "Encountered the beginning of a %s tag" % tag
>
> ? ? def handle_endtag(self, tag):
> ? ? ? ? print "Encountered the end of a %s tag" % tag
>
> from HTMLParser import HTMLParser
> import urllib
> import myhtmlparser
>
> x = MyHTMLParser(HTMLParser())
> site = urllib.urlopen("http://docs.python.org/lib/module-
> HTMLParser.html")
> for row in site:
> ? ? print x.handle_starttag()

this works fine to me:


from HTMLParser import HTMLParser

class MyHTMLParser(HTMLParser):

    def handle_starttag(self, tag, attrs):
        print "Encountered the beginning of a %s tag" % tag

    def handle_endtag(self, tag):
        print "Encountered the end of a %s tag" % tag

#from HTMLParser import HTMLParser
import urllib
#import mythmlparser

site = urllib.urlopen("http://docs.python.org/lib/module-
HTMLParser.html")
x = MyHTMLParser()  #   x = MyHTMLParser(HTMLParser())
x.feed(site.read())
x.close()
for row in site:
    print x.handle_starttag()
site.close()


You should also read this:
http://www.diveintopython.org/html_processing/extracting_data.html
for example


From larry.bates at websafe.com`  Tue May 13 09:20:15 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 08:20:15 -0500
Subject: wxpython dialog - do something after ShowModal()?
In-Reply-To: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>

Iain King wrote:
> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.
> 
> dlg.ShowModal()
> onBrowse()
> 
> obviously doesn't work, and neither does the reverse.  I was hoping
> that the dialog would throw some kind of "I have been shown" event,
> but it doesn't (as far as I can tell).  How do I make the dialog do
> something as soon as it's been shown?
> 
> Iain

If the only things on your modal dialog are Browse and cancel, just call the 
wx.FileDialog directly and eliminate the intermediate modal dialog.  If not 
don't bind the FileDialog to a button, just create an instance of it as the last 
  you do in the __init__ method of the modal dialog code.

If this doesn't help, you will have better luck posting to wxpython newsgroup.

-Larry


From mail at timgolden.me.uk  Tue May  6 07:44:49 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 12:44:49 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
Message-ID: <482044B1.5040906@timgolden.me.uk>

<<< No Message Collected >>>


From brian at briansmith.org  Mon May 26 15:46:48 2008
From: brian at briansmith.org (Brian Smith)
Date: Mon, 26 May 2008 12:46:48 -0700
Subject: Question about wsgi.input
In-Reply-To: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
Message-ID: <003801c8bf69$3e8e17b0$0202a8c0@T60>

> at the end of the previous read?

At the end of the previous read.

Web-SIG is the mailing list for WSGI and related stuff.

- Brian



From amit.uttam at gmail.com  Fri May 16 18:38:16 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 15:38:16 -0700 (PDT)
Subject: SImple python print question
Message-ID: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>

Hey there,

I have a simple question about python print statement. Take the
following code snippet for example...

1 print "-#- executing: %s" % section,
2 tests[section] = test.testcase(name=config.get(section,'name'))
3 tests[section].runTest()
4 printStatus(tests[section])

Now the problem is that line 1 does not get printed until line 4. What
I thought would happen is that line 1 gets executed and the user sees
that the statement that the test case is executing. Then after the
test case executes a "PASS" or "FAIL" appears on the same line as the
"-#- executing: 0053" statement.

e.g.
-#- executing: 0053     FAIL

Some tests take a long time to finish thus the screen is blank until
the entire test finishes and the above statement is outputted.

Thanks for any help.

Amit


From zerge69 at gmail.com  Tue May 27 18:19:53 2008
From: zerge69 at gmail.com (Zerge)
Date: Tue, 27 May 2008 15:19:53 -0700 (PDT)
Subject: Maximum items in a list?
Message-ID: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>

Hi,

Is there a theoretical limit to the number of items that can be
appended to a list?
thanks


From usenet at solar-empire.de  Thu May 22 15:48:19 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Thu, 22 May 2008 21:48:19 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <39vgg5-a9t.ln1@pluto.solar-empire.de>

Joel Koltner <zapwireDASHgroups at yahoo.com> wrote:
> Is there an easy way to get a list comprehension to produce a flat
> list of, say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]

I'm not sure I would recommend it, but try:

[v for x in range(4) for v in (x, 2 * x)]

> A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
> with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
> with "zip" to do so?

A similar solution as above should work.

Marc


From johnjsal at NOSPAMgmail.com  Fri May 23 09:13:50 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 23 May 2008 09:13:50 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
Message-ID: <4836c28e$0$25161$c3e8da3@news.astraweb.com>

"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4836747b$0$15488$426a74cc at news.free.fr...
> Ever heard of the "Model/View/Controller" pattern ?

Yes, I have, but I probably don't understand it well enough yet. For 
example, I don't  really know what is meant by phrases like "build a model", 
"the view registers itself with the model", "interations are sent to the 
appropriate controller" -- I may understand them literally, but I get the 
feeling that the implementation of these ideas are beyond me. I think it's 
mainly an issue of terminology, so probably I should just read up on MVC.

> The user interface doesn't need to be graphical. There were games and 
> emails clients and text editors before GUIs existed, you know ?

Of course, but I'm specifically asking about creating a program that has a 
GUI, and even more specifically it would be wxPython. 




From Georgina.Hindall at dea.gov  Fri May  9 18:02:09 2008
From: Georgina.Hindall at dea.gov (Georgina.Hindall at dea.gov)
Date: Sat, 9 May 2008 22:02:09 GMT
Subject: Protect yourself against Operation Sudden Fall
Message-ID: <0saodIfo6K.TfnSliFYQaDGL@news.dea.gov>

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands.  Encrypt your messages with one
of these:

   http://www.CryptoSMS.org
   http://www.CryptoSMS.com
   http://www.FortressMail.net/fortress_sms.htm
   http://www.Cop2p.com/encrypted_sms.html

Be Safe, Be Encrypted, Fuck the Police!!

--
No vital tablets lodge Lawrence, and they stealthily whisper Roberta too.


From darcy at druid.net  Sat May 24 16:46:08 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sat, 24 May 2008 16:46:08 -0400
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
Message-ID: <20080524164608.5a803201.darcy@druid.net>

On Sat, 24 May 2008 21:14:36 +0200
David <wizzardx at gmail.com> wrote:
> Is it considered to be cheating if you make a test case which always
> fails with a "TODO: Make a proper test case" message?

Yes.  It's better to have the daily reminder that some code needs to be
finished.

> While it is possible to describe all problems in docs, it can be very
> hard to write actual test code.

It may be hard to start but once you have your framework in place it
becomes very easy.

> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

Believe me, thousands of people reading this are remembering situations
where something that couldn't possibly happen happened.

> A few examples off the top of my head:
> 
> * Code which checks for hardware defects (pentium floating point,
> memory or disk errors, etc).
> 
> * Code that checks that a file is less than 1 TB large (but you only
> have 320 GB harddrives in your testing environment).
> 
> * Code which checks if the machine was rebooted over a year ago.
> 
> And so on. These I would manually test by temporarily changing
> variables in the code, then changing them back. To unit test these you
> would need to write mock functions and arrange for the tested code to
> call them instead of the python built-ins.

Yes but the mock functions can be wrappers around the real functions
which only change the results that you are testing for.

> eg: You call function MyFunc with argument X, and expect to get result Y.
> 
> MyFunc calls __private_func1, and __private_func2.
> 
> You can check in your unit test that MyFunc returns result Y, but you
> shouldn't check __private_func1 and __private_func2 directly, even if
> they really should be tested (maybe they sometimes have unwanted side
> effects unrelated to MyFunc's return value).

It isn't your job to test __private_func1 and __private_func2 unless
you are writing MyFunc.

> Depends on the type of bug. If it's a bug which breaks the unit tests,
> then it can be found quickly. Unit tests won't help with bugs they
> don't explicitly cover. eg off-by-one, memory leaks, CPU load,
> side-effects (outside what the unit tests test), and so on.

No but when you find that your code breaks due to these problems that's
when you write new unit tests.

> But once you track down problems like the above you can write more
> unit tests to catch those exact bugs in the future. This is one case
> where I do favour unit tests.

Yes!  One of the biggest advantages to unit testing is that you never
ever deliver the same bug to the client twice.  Delivering software
with a bug is bad but delivering it with the same bug after it was
reported and fixed is calamitous.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From mbelzile at softimage.com  Thu May 15 10:57:55 2008
From: mbelzile at softimage.com (=?iso-8859-1?Q?Marc-Andr=E9_Belzile?=)
Date: Thu, 15 May 2008 10:57:55 -0400
Subject: Building python 2.5 fails on linux 64
Message-ID: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>

Hi,
 
I have the following error when building python 2.5 (revision 63261)
 
./Parser/asdl_c.py -c ./Python ./Parser/Python.asdl
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "./Parser/asdl_c.py", line 7, in ?
    import os, sys, traceback
ImportError: No module named os
make: *** [Python/Python-ast.c] Error 1
 
I'm using gcc version 4.1.1 on Red Hat Enterprise Linux WS release 4 (Nahant Update 4)
 
What could be the problem ?
 
Thanks for helping.
 
-mab

 
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From josiah.carlson at gmail.com  Tue May 13 21:29:16 2008
From: josiah.carlson at gmail.com (Josiah Carlson)
Date: Tue, 13 May 2008 18:29:16 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com> 
	<cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>
Message-ID: <bf6afcf5-7b62-4f99-98d4-9097ecef531a@u6g2000prc.googlegroups.com>

On May 13, 9:35 am, "ludvig.eric... at gmail.com"
<ludvig.eric... at gmail.com> wrote:
> > In a pure world, the only writing that is done would be within the
> > handle_send() callbacks within the select loop.  Then again, in a
> > perfect world, calling readable() and writable() would have no strange
> > side affects (as your example below has), and all push*() calls would
> > be made within the handle_*() methods.
>
> It wouldn't have those side-effects if push really just pushed. :-P
>
> > We do not live in a pure world, Python isn't pure (practicality beats
> > purity), and by attempting to send some data each time a .push*()
> > method is called, there are measurable increases in transfer rates.
>
> -- 8< --
>
> > Yes, it would be convenient to not have push*() actually send data
> > when called in some cases, but in others, the increase in data
> > transfer rates and/or reduction in latency is substantial.
>
> If it increases transfer speed that much, the calling application
> almost has to be broken, or at least not designed as it should be - of
> course there are such applications, but you know...

It's not a matter of being broken at all, it's a matter of control
flow.  When we immediately try to send whenever a .push() call is
made, the underlying TCP/IP stack will accept a reasonably large
amount of data before it actually fills up (the most recent FreeBSD,
from what I understand, will accept up to 1 meg, which is how they are
able to saturate 10Gbit links), and by tossing the data into the the
TCP/IP buffer early, the data gets sent earlier, thus reducing
latency.

Further, because we are making more actual calls to socket.send(),
assuming the underlying TCP/IP buffer isn't filled (which may or may
not be a good assumption), and assuming that the link has more
capacity than is being used (usually the case on LANs and high-speed
internet links), putting more data into the buffer to be handled by
the underlying link layers will also increase transfer speeds.

When the socket.send() calls are delayed until the next pass through
the loop, and we aren't doing an initial send, then we don't get the
benefit of the underlying TCP/IP socket layer buffering.

In my experience over high-speed connections (LANs, Gbit WAN links,
local machine connections), I have found that increasing block sizes
to 32k to significantly improve performance for bandwidth constrained
applications, as there are far fewer blocks to toss to the underlying
layers, less Python code execution (Python 2.5 has a default block
size of 512 bytes, or 64x as much Python execution to send the same
amount of data, and one of the proposed 2.6 changes is to up this to a
more reasonable 4096 bytes), and more effective use of the TCP/IP
buffers (which are typically 64k or larger).

> Anyway, I went for a subclassing way of dealing with it, and it works
> fine.
>
> Thanks for the reply though, hadn't considered possibly "flawed"
> applications where the asyncore loop isn't revisited as often as it
> should. :->
> Ludvig

Again, it's not about the application being flawed, it's a matter of
control flow. ;)  Also, it's not a matter of any timeouts in the
select/poll loops (as Giampaolo suggested); if any socket is readable
or writable, those calls will return immediately (a few hundred
microseconds per call isn't bad).

 - Josiah


From wizzardx at gmail.com  Tue May  6 17:19:29 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 23:19:29 +0200
Subject: How do you debug memory usage?
In-Reply-To: <56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
References: <mailman.652.1210080485.12834.python-list@python.org>
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
Message-ID: <18c1e6480805061419u4164f093ke1e3f930d4f2af33@mail.gmail.com>

>
>  Here is my modified version of Chris' get_all_objects() function.
>  All I did was force garbage collection using gc.collect().
>  This makes sure that you are not counting objects that Python has
>  left in memory, but plans on deleting at some point.

Thanks for the logic.

I want to debug rdiff-backup (Python backup tool for Linux) - it's
using 2 GB of memory (1GB ram, 1GB swap) on a backup server at work.

I'll use your method to find out why this is happening. Even if it
doesn't give me exact details, it should be enough info to go by.

David


From bbxx789_05ss at yahoo.com  Sat May 17 13:54:55 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 10:54:55 -0700 (PDT)
Subject: Cookies and CookieJar
References: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>
Message-ID: <b9b30382-8234-42f1-b91a-15f128eda072@59g2000hsb.googlegroups.com>

On May 16, 9:21?am, Larry Bates <larry.ba... at websafe.com`> wrote:
> I'm struggling with a project using mechanize and cookies to screen scape a
> website. ?The site requires a client created cookie for authentication. ?Below
> is the code I'm attempting to use with the traceback I'm getting:
>
> ?>>> import Cookie
> ?>>> c=Cookie.SimpleCookie()
> ?>>> c["Manageopen"]="cards"
> ?>>> c['Manageopen']['expires'] = 0
> ?>>> c['Manageopen']['path'] = "/"
> ?>>> c['Manageopen']['domain'] = ".domain.com"
> ?>>> c['Manageopen']['secure'] = ""
> ?>>> c.output()
> 'Set-Cookie: Manageopen=cards; Domain=.domain.com; expires=Fri, 16-May-2008
> 14:06:00 GMT; Path=/'
> ?>>> import cookielib
> ?>>> cj=cookielib.CookieJar()
> ?>>> cj.set_cookie(c)
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> ? ?File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
> ? ? ?if cookie.domain not in c: c[cookie.domain] = {}
> AttributeError: 'SimpleCookie' object has no attribute 'domain'
> ?>>>
>
> I also tried:
>
> ?>>> cj.set_cookie(c["Manageopen"])
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> ? ?File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
> ? ? ?if cookie.domain not in c: c[cookie.domain] = {}
> AttributeError: 'Morsel' object has no attribute 'domain'
>
> I've looked at everything I can find via Google and nothing seems to help.
>
> Thanks in advance.
>
> Regards,
> Larry

Hi,

In the python docs, set_cookie() is defined like this:

---
set_cookie(cookie)
Set a Cookie, without checking with policy to see whether or not it
should be set.
---

The Cookie mentioned there is a an object of the Cookie class which is
defined in the cookielib module.  On the other hand,
Cookie.SimpleCookie() creates an object of a class called SimpleCookie
(and SimpleCookie inherits from a class called BaseCookie).
Therefore, the object returned by Cookie.SimpleCookie() is not a
Cookie--it's a SimpleCookie.  Just because the module that contains
the SimpleCookie class is called Cookie does not mean that
SimpleCookie inherits from the Cookie class or that SimpleCookie has
any connection to the Cookie class located in the cookielib module.
If that's too confusing, here is the way the python modules are set
up:

Cookie module:
-------------
BaseCookie class
    |
    V
SimpleCookie class




cookielib module
----------------
Cookie class

CookieJar class
---set_cookie(Cookie)


What you did in your code was you supplied set_cookie() with a
SimpleCookie object, and set_cookie() expects a Cookie object.
SimpleCookie objects are a mapping and you access the data using the
notation:

> ?>>> c['Manageopen']['domain'] = ".domain.com"

But if you open up cookilib.py and look at the line in the error
message:

> File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie

you will see that the code uses the notation:

> ? ? ?if cookie.domain ...

That's because the Cookie class defines simple objects that have
attributes that are accessed normally, i.e. with dot notation.


> The site requires a client created cookie for authentication.

A "cookie" is just one of the headers in a request.  Instead of using
a url string to retrieve a web page with urllib2.urlopen(), you can
use a Request object.  And Request objects allow you to set headers,
which means you can set a cookie header.

But the site will probably check every subsequent request for that
cookie header as well, so that means you will need to add the header
to every subsequent request you make.  That is where CookieJar can
help you.  It can store cookies in a file and then automatically add
them to every request for you.  It's a bit complicated though.  See
here:

http://www.voidspace.org.uk/python/articles/cookielib.shtml












From upton at virginia.edu  Thu May 22 14:05:15 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 14:05:15 -0400
Subject: Books for learning how to write "big" programs
In-Reply-To: <c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
	<c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>
Message-ID: <5504f9ac0805221105ib26fe95iba00cef52aa01c3c@mail.gmail.com>

On Thu, May 22, 2008 at 1:49 PM, Kurt Smith <kwmsmith at gmail.com> wrote:
> On Thu, May 22, 2008 at 10:55 AM, duli <dulipishi at gmail.com> wrote:
>> Hi:
>> I would like recommendations for books (in any language, not
>> necessarily C++, C, python) which have walkthroughs for developing
>> a big software project ? So starting from inception, problem
>> definition, design, coding and final delivery on a single theme
>> or application.
>
> The bigger the project, the more likely it is that you'll have
> documentation on how to use it (for a language or library, how to use
> the features in your program) but to take the time to write up a
> dead-tree book on the project's "inception, problem definition,
> design, coding and final delivery" is not likely well spent.  Anyone
> who has the expertise to write such a book would probably be spending
> his time working on the next phase of the project itself.
>
> Someone will probably respond with an amazon link to a book that does
> exactly what you're asking, in which case, I will stand corrected.
> But I'll be surprised.
>

Well, except for some higher-level textbooks.  For instance, I *think*
(not positive) that any of Appel's "Modern Compiler Implementation"
books give a pretty thorough treatment of implementing a compiler
(except for the obvious part where, since it's intended as a textbook,
some gaps are left for the student to fill in).  I also think the
recent edition of the Dragon book (Compilers: Principles, Techniques,
and Tools 2nd ed) has a complete compiler frontend in one of the
appendices (although you kind of have to mix and match to figure out
where in the book they've described the parts that lead to writing out
the code shown in the appendix).

-dan


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 03:26:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 09:26:54 +0200
Subject: What is self.file = file for?
In-Reply-To: <f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
	<f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>
Message-ID: <482a9438$0$21057$426a34cc@news.free.fr>

afrobeard a ?crit :

(top-post corrected. Please, do not top-post).

> On May 14, 3:08 am, wxPytho... at gmail.com wrote:
>> Hello!
>>
>> I have trouble understanding something in this code snippet:
>>
>> class TextReader:
>>     """Print and number lines in a text file."""
>>     def __init__(self, file):
>>         self.file = file
>>         .
>>         .
>>         .
>>
>> When would you do a thing like  self.file = file  ? I really don't
>> find an answer on this. Please help me understand this.
> 
> If you are familiar to C++ or a similar language, the concept of the
> this pointer might not be alien to you. self in this context is
> basically a reference to the class itself.

Nope. It's a reference to the instance.

> Hence self.file is creating
> a class member

Nope. It's setting an instance attribute.

> and setting to the input from file.
> 
> As Gary pointed out, during initialization, only the latter parameter
> i.e. file is being passed to __init__

Nope. Obviously, both parameters are passed - else it just wouldn't 
work. Given an object 'obj' instance of class 'Cls', you can think of 
obj.method(arg) as a convenient shortcut for Cls.method(obj, arg).


From inhahe at gmail.com  Thu May 22 18:14:53 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:14:53 -0400
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <JemZj.61574$3v1.54084@bignews3.bellsouth.net>

I don't like php.  I tried it once and I had it sort a list, but the list 
was apparently too long for its sorting function because it just sorted the 
first so-many elements of it and left the rest in order, and didn't generate 
any error.  I like a language that's actually determined by what you tell it 
to do.   I hear it has a lot of security issues too.  I'm not sure that php 
*runs* faster than python, having seen benchmarks, but it certainly loads 
faster.  Maybe not so much of a difference once python25.dll is already in 
the cache though (speaking from a windows perspective).  because when i load 
a program it can take a while but it's pretty quick if i'd just loaded one 
recently.  but you don't necessarily have to load python for each page 
rendering anyway.

I like the Python language a lot better than php.  but I just really like 
Python.

php mixes html and code out-of-the-box (sort of.. i guess it's more like a 
reversal of which one is explicit)... if you use Python you should look into 
a 'templating engine' like mako.  i use cheetah, but mako is supposed to be 
better.

i think Python is the easiest language to learn, with the possible exception 
of qbasic (just because making multidimensional arrays in python isnt that 
obvious, although maybe it is using numpy, i've never tried it).  Python 
isn't as easy as basic if you use/have to read the more advanced features, 
but those aren't even available in basic. so I find it a comfortable 
learning curve.
















From nick at craig-wood.com  Fri May 23 06:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 05:30:09 -0500
Subject: Why is math.pi slightly wrong?
References: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
	<mailman.1477.1211476362.12834.python-list@python.org>
Message-ID: <slrng3d6dn.3re.nick@irishsea.home.craig-wood.com>

Jerry Hill <malaclypse2 at gmail.com> wrote:
>  On Thu, May 22, 2008 at 12:32 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:
> > I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
> >
> > Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
> 
>  I believe this is an issue with the precision of IEEE floating point
>  numbers[1].  Those are the types of numbers used by the hardware
>  floating point processor on your CPU.  I'm not an expert, by any
>  stretch of the imagination, but I believe you have two choices to
>  represent pi as an IEEE double precision float:
> 
>  3.1415926535897931 (stored as 0x400921FB54442D18) or
>  3.1415926535897936 (stored as 0x400921FB54442D19)

Just in case you were wondering how you get those hex numbers (like I
was!)

  >>> import math
  >>> import struct
  >>> struct.pack(">d", math.pi).encode("hex")
  '400921fb54442d18'
  >>> struct.unpack(">d", "400921FB54442D18".decode("hex"))
  (3.1415926535897931,)
  >>> struct.unpack(">d", "400921FB54442D19".decode("hex"))
  (3.1415926535897936,)
  >>> 

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mmanns at gmx.net  Sun May 25 08:34:34 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 25 May 2008 14:34:34 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
	<g1bl71$1id1$1@news.mtu.ru>
Message-ID: <g1bmcq$9ve$1@aioe.org>

On Sun, 25 May 2008 12:14:25 +0000 (UTC)
Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

> On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
> 
> Maybe make a set of code objects?
> 
> func_code_set = set([f.func_code for f in funclist])
> 
> funclist = []
> for fc in func_code_set:
>     f = lambda x: x
>     f.func_code = fc
>     funclist.append(f)

Works for me.

Thanks

Martin


From arnodel at googlemail.com  Fri May  9 02:22:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 07:22:15 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.817.1210288386.12834.python-list@python.org>
	<6a0e537e-2487-4bed-b84c-3b84ae46aaa4@b5g2000pri.googlegroups.com>
Message-ID: <m2r6cc3sko.fsf@googlemail.com>

Dan Bishop <danb_83 at yahoo.com> writes:

> On May 8, 6:14?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>> On Thursday 08 May 2008 06:54:42 pm wxPytho... at gmail.com wrote:
>>
>> > The problem is that Python parses -123**0 as -(123**0), not as
>> > (-123)**0.
>>
>> Actually, I've always written it as (-123)**0. At least where I'm from,
>> exponentiation takes precedence even over unary "-". (to get a power of -123,
>> you must write $(-123)^0$ [latex])
>
> FWIW, my TI-89 evaluates it as -1.
>
>> Though not an authoritative source, wikipedia also uses the (-x)^y
>> notation:http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one
>>
>> Btw, there seems to be a math problem in python with exponentiation...
>>
>> >>> 0**0
>>
>> 1
>>
>> That 0^0 should be a nan or exception, I guess, but not 1.
>>
>> [just found out while trying the poster's example]
>
> Technically correct, but 0**0 == 1 is actually pretty useful.  For one
> thing, it lets you create a Vandermonde matrix without making 0 a
> special case.

If we want Binomial expansion to work sanely, we need 0^0 = 1, e.g:

(x+0)^2 = 1*x^2*0^0 + 2*x*0 + 1*x^0*0^2
        = x^2

Therefore 0^0 = 1

Also, x^y (for x, y natural numbers) can be defined as the number of
functions from Y to X where |X|=x and |Y|=y.  As there is exactly one
function from the empty set to the empty set, 0^0 = 1.

The arguments for making 0^0 = 0 are weak, it is a bit more convincing
to want it to be undefined (as (0,0) is a point of discontinuity of
(x,y) -> x^y).
-- 
Arnaud


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:02:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:02:33 -0300
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
	<3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua4lijavx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 10:23:33 -0300, gsal <salgerman at gmail.com> escribi?:

> hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
> the packages I was using because they were in the "egg" form.  I was
> hoping Installer could...then again, I don't know how long ago
> Installer was written and whether eggs came along after that...

http://www.py2exe.org/index.cgi/ExeWithEggs
PyInstaller has the same problem regarding eggs: see  
http://pyinstaller.python-hosting.com/wiki/FAQ
(did I menction that I hate eggs?)

-- 
Gabriel Genellina



From daveparker at flamingthunder.com  Wed May 21 22:46:10 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 19:46:10 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com> 
	<afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com> 
	<12071a08-5c5d-4541-bc34-ed1f1ac4e96f@8g2000hse.googlegroups.com>
Message-ID: <dd2856c7-c408-4d6f-bd93-811211b95019@g16g2000pri.googlegroups.com>

On May 21, 7:49?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> I've thought of one possible drawback: "a" and "an" can be used as
> variables, so the "is a" part might cause a problem. You'd need to
> check the parser to find out...

Good point, I hadn't noticed that.  I'll check it out.


From mabbikeel at gmail.com  Sun May 18 14:22:57 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 19:22:57 +0100
Subject: [jcd@sdf.lonestar.org: Re: Compress a string]
References: <20080518181357.GB14680@sdf.lonestar.org>
Message-ID: <op.ubc30jbc4fd8pl@mp1206-hp.config>

On Sun, 18 May 2008 19:13:57 +0100, J. Clifford Dyer  
<jcd at sdf.lonestar.org> wrote:

> On Sun, May 18, 2008 at 07:06:10PM +0100, Matt Porter wrote regarding  
> Compress a string:
>>
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"
>>
>> The code I have so far feels like it could be made clearer and more
>> succinct, but a solution is currently escaping me.
>>
>>
>> def compress_str(str):
>>     new_str = ""
>>     for i, c in enumerate(str):
>>         try:
>>             if c != str[i+1]:
>>                 new_str += c
>>         except IndexError:
>>             new_str += c
>>     return new_str
>>
>>
>> Cheers
>> Matt
>
> def compress_str(s):
>     # str is a builtin keyword. Don't overload it.
> 	out = []
> 	for c in s:
> 		if out and c == out[-1]:
> 			out.append(c) # This is faster than new_str += c
> 	return ''.join(out)
>
>

Thanks. Had to change a few bits to make it behave as I expected:

def compress_str(s):
     # str is a builtin keyword. Don't overload it.
     out = [s[0],]
     for c in s:
         if out and c != out[-1]:
             out.append(c) # This is faster than new_str += c
     return ''.join(out)

Feels slightly less hacked together


> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
--



From banibrata.dutta at gmail.com  Tue May  6 14:16:40 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 23:46:40 +0530
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
	<18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
	<18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>
Message-ID: <3de8e1f70805061116p75b6b0bcn30f43ba757ab37@mail.gmail.com>

Ah yes. Thanks for posting your finding. Had come accross Heapy, earlier,
but forgotten about it completely.


On Tue, May 6, 2008 at 8:34 PM, David <wizzardx at gmail.com> wrote:

> >
> >  I'll check a few of those results and post to the list if I find
> something good.
> >
>
> It looks like Heapy, part of the Guppy project can do this:
>
> http://guppy-pe.sourceforge.net/#Heapy
>
> David.
>
>
>
>
>
>
> David.
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From inhahe at gmail.com  Sat May 17 15:03:51 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 15:03:51 -0400
Subject: help compiling Python on vs 2008!
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
Message-ID: <QZFXj.6721$255.5738@bignews8.bellsouth.net>


"Christian Heimes" <lists at cheimes.de> wrote in message 
news:mailman.1270.1211029209.12834.python-list at python.org...
> inhahe schrieb:
>> what is going on here, and how do I compile these external libraries?
>
> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
> supported. Some extensions don't compile under VS 9.0
>
> Christian
>

I just installed Visual Studio 8 and tried compling and I bgot the same 
problem.  hope this isn't a redundant post. i don't know if 
pyhon-list at python.org reposts here.




From jeffrey at fro.man  Wed May 21 16:55:40 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Wed, 21 May 2008 13:55:40 -0700
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <FYqdnZI06dbQEanVnZ2dnUVZ_u2dnZ2d@cablespeedwa.com>

notbob wrote:

> I
> persevere because it's more fun/challenging than video games


This is the crux of the matter from where I'm sitting. If the purpose of
learning a programming language is fun, then the primary relevant question
is:

        Is it more fun to code in Python or PHP?

The answer is a no-brainer for me. It seems to me that Python is designed
from the ground up with my enjoyment in mind. Your Fun May Vary :-)


Jeffrey


From sjmachin at lexicon.net  Tue May 13 17:38:28 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 21:38:28 GMT
Subject: help with file path exceeding 255 characters
In-Reply-To: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <482a0a52@news.mel.dft.com.au>

yguan08 at gmail.com wrote:
> I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
> 
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
> 
> fsize = os.path.getsize(fullpath)
> 
> 
> WindowsError: [Error 206] The filename or extension is too long:
> 
> The same thing with os.stat(fullpath).
> 
> I tried using the relative path, but it does not work with the message
> fname not found.
> 
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)

I suspect that the cause of the problem here is that while *x OSes have 
just one current working directory, Windows has one cwd per drive.

> filesize = os.path.getsize(fname)
> 
> Is there a walk around of this?

At the DOS command level, you can do
     subst x: very\long\path
and then refer to
     x:filestem.ext
where x is any unused drive letter.

This seems to work:

 >>> import os
 >>> os.system('subst x: c:\\junk')
0
 >>> f = open('x:foo.py')
 >>> f.read()
"print 'hello'\n"
 >>>

HTH,
John


From daveparker at flamingthunder.com  Wed May 21 23:27:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 20:27:05 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>
Message-ID: <a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>

On May 21, 7:01?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> The crucial thing is not to slow down the calculations with useless
> bells and whistles.

Are you running your simulations on a system that does or does not
support the "useless bell and whistle" of correct rounding?  If not,
how do you prevent regression towards 0?

For example, one of the things that caused the PS3 to be in 3rd place
behind the Wii and XBox 360 is that to save a cycle or two, the PS3
cell core does not support rounding of single precision results -- it
truncates them towards 0.  That led to horrible single-pixel errors in
the early demos I saw, which in term helped contribute to game release
delays, which has turned into a major disappointment for Sony.


From denis.kasak at gmail.com  Sun May 25 18:29:41 2008
From: denis.kasak at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 00:29:41 +0200
Subject: Getting a set of lambda functions
In-Reply-To: <39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
References: <g1bjcj$u3m$1@aioe.org>
	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
Message-ID: <39e19a010805251529t51787e17ybd7b12297b79755a@mail.gmail.com>

On Sun, May 25, 2008 at 1:43 PM, Martin Manns <mmanns at gmx.net> wrote:
> Hi,
>
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda
> functions to use this property for comparison).
>
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution
> is not important.)
>
> How can I achieve this?
>
>>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>>>> len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False

Isn't this a bug? Shouldn't it be possible to create a set of
different lambda functions via a loop? At first I thought it was just
a quirk of list comprehensions, but the following example also yields
incorrect (or at least unintuitive) results:

>>> spam = []
>>> for i in range(10):
...   spam.append(lambda: i)
>>> spam[0]()
9
>>> spam[1]()
9

Manually creating the lambdas and appending them to a list works as
expected, naturally; I don't see a good reason why it wouldn't work
with a loop. Am I missing something?

--
Denis Kasak


From alan.wright at volubill.com  Mon May 19 11:25:28 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 16:25:28 +0100
Subject: Newbie: Keep TCP socket open
Message-ID: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>

Hi Folks,
I am newbie to Python, but have successfully created a simple client and 
server setup, I have one issue though.

I am trying to test a box by sending many TCP conns (WHILE loop) but not 
closing them with a FIN/RST. However, no matter what i do, i cannot get the 
loop to stop sending FIN from the client.

Any clues?

Here is my current script

#!/usr/bin/python

import socket,sys
from numpy import *
num1=0

while (num1<=10) :

 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.settimeout(10.0)
 s.connect(("10.1.1.69", 50008)) # SMTP
 print s.recv(1024) + '\n',
 num1=num1+1
 #s.close()


sys.exit(1) 




From deets at nospam.web.de  Sun May 25 09:26:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 15:26:16 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <4ob*BLLds@news.chiark.greenend.org.uk>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
	<4ob*BLLds@news.chiark.greenend.org.uk>
Message-ID: <69t7nrF3526bjU1@mid.uni-berlin.de>

Matthew Woodcraft schrieb:
> Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Sebastian 'lunar' Wiesner schrieb:
>>> I guess, Apache does some kind of memory caching for files, which are often
>>> requested and small enough to fit into the system memory.  May be, that's
>>> what the OP is referring to ...
> 
>> I'm not aware of that, and I even more seriously doubt it. Because 
>> caching is a complicated, domain-dependend subject that would 
>> *immediately* cry for configuration - e.g. caching strategies and such.
> 
> This is available in current apache with mod_file_cache (for an
> explicitly configured list of files). I think the circumstances where
> you'd want to use it are quite rare.

As I said - explicit configuration is needed. And of course apache & 
it's module system are flexible enough to allow caching as add-on. But 
Sebastian speculated about some behind the scenes automatic caching. 
Which apparently isn't there.

Diez


From gnewsg at gmail.com  Fri May  2 23:01:34 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 20:01:34 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
Message-ID: <80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>

On 2 Mag, 21:41, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > My hosting company provides me a common IPv4 address.
> > I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> > really matter) to temporarily use IPv6 for trying to add such feature
> > to my library (I work on both Windows XP and Linux).
> > Could someone point me to some resources describing how could I do
> > that?
>
> Information is spread widely. If you really want resources, I recommend
> to google for them; there are various IPv6 howtos.
>
> Here is how I would do it:
>
> On Linux, "modprobe ipv6", then "ifconfig". This should display the
> loopback adapter, with the address "::1". You should then be able to
> listen on that address, and connect to it.
>
> On Windows (XP SP2), "netsh int ipv6 install". Again, you should be able
> to use IPv6 loopback afterwards.
>
> If you want true connectivity to the global IPv6 internet, I recommend
> SixXS (http://www.sixxs.net/). You can setup a tunnel to the IPv6 net
> through your IPv4 POP, using a close IPv6 POP who participates in SixXS.
> To set up the tunnel, you then use aiccu, which works really well for
> me (and is packaged conveniently as a Debian package).
>
> Regards,
> Martin

Thanks a lot. I've been able to listen on ::1:21 after having
installed IPv6 on both Windows and Linux thanks to your suggestions.
I'd like to ask one more question: is it possible to bind my server on
both IPv4 and IPv6 addresses (note: I do not use multiple threads or
processes)?


---- Giampaolo
http://code.google.com/p/pyftpdlib


From roy at panix.com  Fri May  2 14:38:47 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 14:38:47 -0400
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
	<roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>
	<1029ba0a-74e0-41d3-8397-7e326f4611bf@a9g2000prl.googlegroups.com>
Message-ID: <roy-1A07DD.14384602052008@70-1-84-166.area1.spcsdns.net>

In article 
<1029ba0a-74e0-41d3-8397-7e326f4611bf at a9g2000prl.googlegroups.com>,
 mp <mailpitches at email.com> wrote:

> Thanks Roy. I was just trying to understand someone else's code, but
> in the end it turns out that this was just a bug.
> 
> What weirded me out was how injecting a print statement preventing the
> error from occurring, but now I get it. Without blocking, the
> connection handshake occurs in parallel after the connect_exc method
> is called. In my example, my processor reaches the send call before
> the connection manages to complete in the background. However, if you
> stick in a print statement after the connect_exc call and before the
> send call, it delays processing just long enough for the connection to
> complete, thus no exception is thrown by the send call.

I don't really understand that last part.  There shouldn't be any 
background processing going on, unless there's a lot more code than you 
showed.

The three-way handshake *can't* happen in the background, because 
connect_ex() has no way to know what value to return until the handshake is 
completed.  Let's say I send a SYN, and 15 seconds later, you send a RST 
(indicating that the connection has been refused).  The connect_ex() call 
has to have waited the 15 seconds for this to happen so it knows to return 
an appropriate error code.

I do not understand why sticking a print statement in there should make any 
difference.


From gherron at islandtraining.com  Sat May 17 11:58:08 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 08:58:08 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
Message-ID: <482F0090.4030003@islandtraining.com>

Marlin Rowley wrote:
>  
> Very cool.
>  
> > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> a represents a tile with height of 2 and width of 4 with 4 bits/pixel 
> for each color.
>  
> > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
> this seperates the stream into individual values - Check
>  
> > >>> b.shape=(2,4,4)
>
> This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check
>  
>  >>> c = b.transpose((2,0,1))
>  
> What does the (2,0,1) represent in terms of width and height and 
> number of bytes?

The (2,0,1) tells how to exchange the axes.  For instance in a 2D array, 
a normal transpose exchanges rows and columns.  It will change a (a by 
b) sized array into a (b by a) sized array.  This would be equivalent to 
the more saying interchange axes 0,1 to the new order of 1,0. 

In numpy with higher dimension arrays, the default transpose just 
exchanges the first two axes, and the full transpose allows you to 
specify exactly the new ordering of the exes.  

So transpose((2,0,1))  means take axes (0,1,2) to the new order 
(2,1,0).  In terms of sizes, an (a by b by c) sized array will end being 
of size (c by a by b) in size. 

In terms of implementation, there may not be *any* data re-arrangement 
in a transpose.   The only thing that needs changing is how the indices 
are converted to an actual machine address of an indexed item.   The 
documentation notes this by saying transpose returns a "new view" of the 
array.   This explains why I copied the array before extracting bytes 
out of it -- you really do need the elements in the new order for the 
next operation.

Gary Herron

>
>
>
>
>  
> ------------------------------------------------------------------------
>
> > Date: Fri, 16 May 2008 17:08:20 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com; python-list at python.org
> > Subject: Re: numpy.frombuffer != unpack() ??
> >
> > Marlin Rowley wrote:
> > > All:
> > >
> > > Say I have an array:
> > >
> > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > >
> > > How do I make it so that I now have:
> > >
> > > starting with first element (a[0])
> > > new_arr[0] = 'r'
> > > new_arr[1] = 'g'
> > > new_arr[2] = 'b'
> > > new_arr[3] = 'a'
> > > new_arr[4] = 'r'
> > > .....
> > >
> > > continuing "through" a[1] with the same new_arr
> > > new_arr[N] = 'r'
> > > new_arr[N+1] = 'g'
> > > ....
> > >
> > > -M
> >
> > Numpy can do this for you. First, do you really mean the array to
> > contain lists of one string each? If so:
> >
> > >>> import numpy
> > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a
> > kludge here
> > >>> b
> > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',
> > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
> > 'b', 'b', 'a', 'a', 'a', 'a'],
> > dtype='|S1')
> > >>> b.shape=(2,4,4)
> > >>> b
> > array([[['r', 'r', 'r', 'r'],
> > ['g', 'g', 'g', 'g'],
> > ['b', 'b', 'b', 'b'],
> > ['a', 'a', 'a', 'a']],
> >
> > [['r', 'r', 'r', 'r'],
> > ['g', 'g', 'g', 'g'],
> > ['b', 'b', 'b', 'b'],
> > ['a', 'a', 'a', 'a']]],
> > dtype='|S1')
> > >>> c = b.transpose((2,0,1))
> > >>> c
> > array([[['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']]],
> > dtype='|S1')
> > >>> d=c.copy() # To make it contiguous
> > >>> d.shape = (32,)
> > >>> d
> > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',
> > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
> > 'b', 'a', 'r', 'g', 'b', 'a'],
> > dtype='|S1')
> >
> > Done. Cool no?
> >
> > Gary Herron
> >
> > >
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > From: marlin_rowley at hotmail.com
> > > To: robert.kern at gmail.com; python-list at python.org
> > > Subject: RE: numpy.frombuffer != unpack() ??
> > > Date: Fri, 16 May 2008 17:31:30 -0500
> > >
> > > Thank you! That solved it!
> > >
> > > -M
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > > To: python-list at python.org
> > > > From: robert.kern at gmail.com
> > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > > Date: Fri, 16 May 2008 17:25:00 -0500
> > > >
> > > > Marlin Rowley wrote:
> > > > > All:
> > > > >
> > > > > I'm getting different floating point values when I use numpy
> > > vs. unpack().
> > > > >
> > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> > > > > buffer = unpack("!f", byte)
> > > > >
> > > > > frgba[0] != buffer[0]
> > > > >
> > > > > why? This is forcing me use the unpack() function since it's
> > > giving me
> > > > > the correct values. What am I doing wrong?
> > > >
> > > > Endianness, perhaps? '!' specifies big-endian data (an alias for
> > > '>'). Most
> > > > likely, you are on a little-endian platform. All of the dtypes
> > > in numpy default
> > > > to the native-endianness unless specified. If you want to read
> > > big-endian data
> > > > using numpy, do this:
> > > >
> > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
> > > >
> > > > If you have any more problems with numpy, please join us on the
> > > numpy mailing
> > > > list. When reporting problems, please try to provide a small but
> > > complete
> > > > snippet of self-contained code, the output that you got, and
> > > explain the output
> > > > that you expected to get. Thank you.
> > > >
> > > > http://www.scipy.org/Mailing_Lists
> > > >
> > > > --
> > > > Robert Kern
> > > >
> > > > "I have come to believe that the whole world is an enigma, a
> > > harmless enigma
> > > > that is made terrible by our own mad attempt to interpret it as
> > > though it had
> > > > an underlying truth."
> > > > -- Umberto Eco
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > E-mail for the greater good. Join the i?m Initiative from
> > > Microsoft.
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > E-mail for the greater good. Join the i?m Initiative from Microsoft.
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Keep your kids safer online with Windows Live Family Safety. Help 
> protect your kids. 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From shiningsandy at gmail.com  Mon May 19 05:59:22 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 02:59:22 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
Message-ID: <9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>


hi
the py code that i have written is here.when i run this code i wont
get any errors it just works fine for me.but when i created the exe i
start getting an error in my 'getMailContent' function. The error
description is

TypeError:unsupported operand type(s) for :- 'instance' and 'int'

i dont know why i am start getting this error when i run it through
the exe.


import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    for kk in range(len(obj.Items),1,-1):
    #for kk in range(len(obj.Items-1),0,-1):
        #print 'hello'
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        writeData(mailItem,txt_file)

        #print mailItem.OlSaveAsType.olMSG
        #saveCopy(mailItem)
        #print "sender="+mailItem.SenderName+'
SenderEmailId='+str(mailItem.SenderEmailAddress)+'
Time='+str(mailItem.ReceivedTime)
        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)

    txt_file.close()
    '''
    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
    file_zip.write('data.log')
    file_zip.close()
    '''

#function to create a directory
#obviously not a best way :-( but i think can expected this sort of
mistakes from beginners
def createDir():
    path=os.path.abspath("\email")
    if(os.path.exists(path)):
        print "Directory already exists"
    else:
        os.system("md "+path)

#function to save a copy of email
def writeData(mailItem,file):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    getAttachmentInfo(mailItem.Attachments)
    file.write(getHTMLString(dataToWrite))
    #checkStringType(dataToWrite)

def getAttachmentInfo(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        #print "File Name="+atmt.FileName+'
DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
        abc=os.path.isdir(os.getcwd()+'\email')

        if(abc==True):
            print 'directory exists'

        else:
            os.mkdir(os.getcwd()+'\email')

        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)



# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):

    if isinstance(a,str):
       b='not a unicode string'

    else:
        a.encode('utf-8')
        #print 'unicode type'

    return a

#function to save the coopy of an email
#:-( but smhow it generate error whenever i make a call to it
def saveCopy(mailItem):

    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
    print name
    #global outlook_app
    try:
        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
    except BaseException:
        print BaseException

def getHTMLString(b):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+b+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    #print outlook_app.OlSaveAsType.olMSG
    print '=================='
    print dir(outlook_app)
    print '=================='
    inbox_obj=getOutLookFolders(outlook_app)
    print dir(inbox_obj)
    print (inbox_obj.Items)
    #saveCopy(inbox_obj.Items[1])
    getMailContent(inbox_obj)



main()


my setup file has this code

from distutils.core import setup
import py2exe

setup(console=['outlook.py'])


i have just copied and pasted it from the tutorial available at the
py2exe site and changed the filename with mine filename.


thanks and regards
sandeep kumar sharma

> There is nothing special in executables produced by py2exe. I mean
> that the debugging strategy is as always. A good start might be in
> adding logging\tracing facilities both to script and the executable.
> Comparing two trace files could give you some clue.


From inhahe at gmail.com  Thu May 22 13:26:04 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:26:04 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <b%hZj.78700$%15.7454@bignews7.bellsouth.net>


"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1476.1211475183.12834.python-list at python.org...
> I've noticed that the value of math.pi -- just entering it at the 
> interactive prompt -- is returned as 3.1415926535897931, whereas (as every 
> pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the 
> end.)
>
> Is this a precision issue, or from the underlying C, or something else? 
> How is math.pi calculated?
>
> I searched for this on the web and in this group and couldn't find 
> anything -- but humble apologies if this has been asked before/elsewhere.
>
> Sam Dutton
>

it's gotta be a precision issue.  floating point numbers are stored on 
computers in binary.  you can't necessarily change the last digit from 1 to 
2 just by changing the last bits.  try converting a value after the decimal 
point to the same value after a decimal point in binary.  there's no telling 
how many bits it'll take.  and sometimes even, what isn't a repeating 
decimal in one base is in another base.

i see these precision issues raised all the time.
"why is my value resulting in 3.61000000001?"
the answer is because you can't store 3.61 in binary.
(i don't know specifically about that number, just an example)

(i know you can, if you use some sort of binary representation of decimal 
digits... but that's not how it's usually done.  it's stored pretty much 
like in scientific notation but in base 2.)







From fred.sells at adventistcare.org  Fri May  9 11:18:24 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Fri, 9 May 2008 11:18:24 -0400
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B08FB@acesxch01.ADVENTISTCORP.NET>

write working programs

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of Raxit at MyKavita.com
> Sent: Thursday, May 08, 2008 6:25 AM
> To: python-list at python.org
> Subject: Newbie to python --- why should i learn !
> 
> 
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
> 
> what can i do easily with python which is not easy in c++/java !?
> 
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From tjreedy at udel.edu  Wed May 14 23:58:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 23:58:50 -0400
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
	<c40b3f66-2ffc-4654-ad85-782bd25d5312@i36g2000prf.googlegroups.com>
Message-ID: <g0gcdm$sre$1@ger.gmane.org>


"Raymond Hettinger" <python at rcn.com> wrote in message 
news:c40b3f66-2ffc-4654-ad85-782bd25d5312 at i36g2000prf.googlegroups.com...
On May 14, 8:24 am, Tal Einat <tal.no.no.s... at gmail.com> wrote:
> I just ran into this. In IDLE (Python 2.5), the call-tip for
> itertools.count is:
> "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

| My IDLE (1.2.2 running on Python 2.5.2) has the correct call-tip.

As does my 3.0 version. count([first_val]) -> count object 





From davidj411 at gmail.com  Wed May 28 13:41:51 2008
From: davidj411 at gmail.com (davidj411)
Date: Wed, 28 May 2008 10:41:51 -0700 (PDT)
Subject: convert string number to real number - ValueError: invalid 
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com> 
	<mailman.1676.1211955740.12834.python-list@python.org>
Message-ID: <a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>

On May 28, 2:22?am, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> David Jackson wrote:
> > i used the csv module and saved its contents to a list.
>
> > ['Date', 'No.', 'Description', 'Debit', 'Credit']
> > ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> > ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
>
> > the credit/debit fields are strings.
> > what should i have done within the CSV module to make numbers appear as
> > numbers?
> > how can i remove the quotes to make them numbers? i realize i posted a
> > solution to this once before (same posting thread) but i am thinking
> > there is a better method.
>
> There doesn't seem to be a way to describe how specific columns should
> be processed in the csv module. ?You could define a conversion function
> that "guesses" the best conversion, for example:
>
> def str2num(datum):
> ? ? ? ? try:
> ? ? ? ? ? ? ? ? return int(datum)
> ? ? ? ? except:
> ? ? ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? ? ? ? ? return float(datum)
> ? ? ? ? ? ? ? ? except:
> ? ? ? ? ? ? ? ? ? ? ? ? return datum
>
> for row in csv.reader(file(r'Transaction.csv')):
> ? ? ? ? [str2num(cell) for cell in row]
>
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', 5678, 'ELECTRONIC PAYMENT', '', 11.449999999999999]
> ['3/04/2007', 5678, 'THE HOME DEPOT 263 SomeCity FL', '',
> 25.399999999999999]
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I like the str2num function approach, but then i get left with a float
that has more than 2 decimal spaces , i.e. 11.50 becomes
11.449999999999999 and round will not fix that.


From saluk64007 at gmail.com  Wed May 14 21:26:51 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Wed, 14 May 2008 18:26:51 -0700
Subject: Passing functions around and executing
In-Reply-To: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
Message-ID: <c3f69bf60805141826nc243e25k7713dc82195fef02@mail.gmail.com>

Here's a quick dumb example, hope it helps:

def function1(a,b,c):
   print a,b,c
def function2(x):
   print x
def function3(y):
   print y+3

def executeall(list):
   print "setting up"
   for function,args in list:
      function(*args)   #Calls the function passing in the arguments

mylist = [[function1,(1,2,3)],[function2,("green",)],[function3,(5.5,)]]
executeall(mylist)

---------
The hard part is the fact that you mentioned some arguments need to be
passed in, some of the time.  This kind of situation makes the most sense if
all of the functions take the same arguments (or no arguments).  Then you
could just do this:
--------------------
def function1():
   print 1
def function2():
   print 2
def function3():
   print 3

def executeall(list):
   print "setting up"
   for function in list:
      function()

mylist = [function1,function2,function3]
executeall(mylist)
--------------------------
So you see, treating functions as regular objects and passing them around,
is as easy as not putting the call operator (parenthesis) to the right of
the function name.

print function   #Prints the representation of the function object
print function()  #Calls the function and then prints what the function
returns

Hope it helps.
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From ivan.illarionov at gmail.com  Wed May  7 19:58:43 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 23:58:43 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
Message-ID: <fvtfni$6pj$2@news.mtu.ru>

On Wed, 07 May 2008 23:46:33 +0000, Ivan Illarionov wrote:

> On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
> 
>> Is there a way to do:
>> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>> x[0,2:6]
>> 
>> That would return:
>> [0, 3, 4, 5, 6]
> 
> IMHO this notation is confusing.
> 
> What's wrong with:
> [0]+x[2:6]
>  
>> I am surprised this notation is not supported, it seems intuitive. A
>> concrete example of the sort of thing I want to do:
>> 
>> p = file('/etc/passwd').readlines()
>> q = [ e.strip().split(':')[0,2:] for e in p ]
>> 
>> (getting rid of the password / x field)
> 
> This works and is clearer:
> [[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]

or maybe you wanted to do this:

>>> [e.split(':')[0] for e in open('/etc/passwd')]
['root', 'daemon', 'bin', 'sys', 'sync', ...]

What are you trying to get from /etc/passwd?

-- 
Ivan



From inhahe at gmail.com  Wed May 21 18:51:07 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 18:51:07 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
Message-ID: <XF1Zj.78287$%15.22707@bignews7.bellsouth.net>

something randomly made me realize why my second solution didn't work, so i 
fixed it.  now you have a working persistent deque.

1. if you call somepdequeobject.load(filename) (as opposed to 
pdeque.load(filename)), do you want it to return a new object that it loaded 
from file, or do you want it to change somepdequeobject to be the object in 
the file?  i'm not sure which way is canonical.

2. i'm not sure if i actually have to use a temp file and then copy it. i 
don't know if pickle.dump as an "atomic commit".

3. cPickle would be faster but i think that means you might end up storing 
something in your deque that can't be pickled, like a circular reference, 
and dunno what else.

4. can someone tell me if the way i'm using the decorator is sane?  i've 
never used decorators before. it just seems ridiculous to a) define a lambda 
that just throws away the parameter, and b) define a meaningless function to 
pass to that lambda.

5. Of course, I am a genius.

from collections import deque
import os, pickle, random

class pdeque(deque):
  def __init__(self, filename, initial=None):
    if initial is None: initial = []
    deque.__init__(self, initial)
    self.filename = filename
    self.tempfilename = ''.join((random.choice("abcdefghijklmnopqrstuvwxyz") 
for x in xrange(10)))+".tmp"
    self.save()
  def save(self):
    pickle.dump(deque(self), open(self.tempfilename,'wb'))
    try: os.remove(self.filename)
    except: pass
    os.rename(self.tempfilename, self.filename)
  @classmethod
  def load(cls, filename):
    return pdeque(filename, pickle.load(open(filename,'rb')))

    #todo: change this so that if it's called from an object it loads
    #the data into that object?

def makefunc(func):
  def func2(instance, *args):
    result = func(instance, *args)
    instance.save()
    return result
  return lambda _: func2

for name, func in deque.__dict__.items():
  if (not name.startswith("_")) or name in ('__delitem__', '__setitem__'):
    @makefunc(func)
    def f(): pass
    setattr(pdeque, name, f)







"castironpi" <castironpi at gmail.com> wrote in message 
news:29451c2a-cb0a-43a6-b140-6c16e3cb46ac at c65g2000hsa.googlegroups.com...
> I'd like a persistent deque, such that the instance operations all
> commit atomicly to file system. 




From tdahsu at gmail.com  Wed May 21 11:41:41 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Wed, 21 May 2008 08:41:41 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
Message-ID: <e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>

On May 21, 11:13?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-21, tda... at gmail.com <tda... at gmail.com> wrote:
>
> > I'd appreciate any help. ?I've got a list of files in a directory, and
> > I'd like to iterate through that list and process each one. ?Rather
> > than do that serially, I was thinking I should start five threads and
> > process five files at a time.
>
> > Is this a good idea? ?I picked the number five at random... I was
>
> Depends what you are doing.
> If you are mainly reading/writing files, there is not much to gain, since 1
> process will already push the disk IO system to its limit. If you do a lot of
> processing, then more threads than the number of processors is not much use. If
> you have more 'burtsy' behavior (first do lot of reading, then lot of
> processing, then again reading, etc), then the system may be able to do some
> scheduling and keep both the processors and the file system busy.
>
> I cannot really give you advice on threading, I have never done that. You may
> want to consider an alternative, namely multi-tasking at OS level. If you can
> easily split the files over a number of OS processes (written in Python), you
> can make the Python program really simple, and let the OS handle the
> task-switching between the programs.
>
> Sincerely,
> Albert

Albert,

Thanks for your response - I appreciate your time!

I am mainly reading and writing files, so it seems like it might not
be a good idea.  What if I read the whole file into memory first, and
operate on it there?  They are not large files...

Either way, I'd hope that someone might respond with an example, as
then I could test and see which is faster!

Thanks again.


From stevegill7 at gmail.com  Tue May 13 20:29:59 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 13 May 2008 17:29:59 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>
Message-ID: <9b4bd2fc-6276-4657-ae73-81eec2ffad61@e39g2000hsf.googlegroups.com>

On May 12, 6:59 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 12, 1:54 pm, Jetus <stevegi... at gmail.com> wrote:
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
>
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> 1) Use BeautifulSoup to extract the path:
>
> JCCOGetImage.jsp?refnum=DN2007036179
>
> from the html page.
>
> 2) The path is relative to the current url, so if the current url is:
>
> http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp
>
> Then the url to the page you want is:
>
> http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2...
>
> You can use urlparse.urljoin() to join a relative path to the current
> url:
>
> import urlparse
>
> base_url = 'http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp'
> relative_url = 'JCCOGetImage.jsp?refnum=DN2007036179'
>
> target_url = urlparse.urljoin(base_url, relative_url)
> print target_url
>
> --output:--http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2...
>
> 3) Python has a webbrowser module that allows you to open urls in a
> browser:
>
> import webbrowser
>
> webbrowser.open("www.google.com")
>
> You could also use system() or os.startfile()[Windows], to do the same
> thing:
>
> os.system(r'C:\"Program Files"\"Mozilla Firefox"\firefox.exe')
>
> #You don't have to worry about directory names
> #with spaces in them if you use startfile():
> os.startfile(r'C:\Program Files\Mozilla Firefox\firefox.exe')
>
> All the urls you posted give me errors when I try to open them in a
> browser, so you will have to sort out those problems first.

7Stud;
Thanks for sharing your knowledge!!

1)The proper url to the website is http://www.landrecords.jcc.ky.gov/records/S0Search.html.

2) The join won't work. I found that the request it sends is
http://206.196.0.195/cgi-bin/webview/SEND2.PGM?dispfmt=&itype=Q&authorization=&parm2=SDAAAA76070B
It looks like it generates a random code for param2...
I have two choices for generating this javascript,
I can click on the View, or in the form, if I put a "i" in the code
and click on the
option link, it will send me pdf file.

3) Was not sure why you suggested I use the Webbrowser module?
But I am glad to find out about it.


From wojtek.gminick.walczak at gmail.com  Tue May  6 17:33:51 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 23:33:51 +0200
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <2c3c21060805061433u6c2acf7dx47ffdc42e45c75b2@mail.gmail.com>

2008/5/6, Anton Slesarev <slesarev.anton at gmail.com>:
>  But I have some problem with writing performance grep analog.
[...]
>  Python code 3-4 times slower on windows. And as I remember on linux
>  the same situation...
>
>  Buffering in open even increase time.
>
>  Is it possible to increase file reading performance?

The best advice would be not to try to beat grep, but if you really
want to, this is the right place ;)

Here is my code:
$ cat grep.py
import sys

if len(sys.argv) != 3:
   print 'grep.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r')

print ''.join((line for line in f if sys.argv[1] in line)),

$ ls -lh debug.0
-rw-r----- 1 gminick root 4,1M 2008-05-07 00:49 debug.0

---
$ time grep nusia debug.0 |wc -l
26009

real    0m0.042s
user    0m0.020s
sys     0m0.004s
---

---
$ time python grep.py nusia debug.0 |wc -l
26009

real    0m0.077s
user    0m0.044s
sys     0m0.016s
---

---
$ time grep nusia debug.0

real    0m3.163s
user    0m0.016s
sys     0m0.064s
---

---
$ time python grep.py nusia debug.0
[26009 lines here...]
real    0m2.628s
user    0m0.032s
sys     0m0.064s
---

So, printing the results take 2.6 secs for python and 3.1s for original grep.
Suprised? The only reason for this is that we have reduced the number
of write calls in the python example:

$ strace -ooriggrep.log grep nusia debug.0
$ grep write origgrep.log |wc -l
26009


$ strace -opygrep.log python grep.py nusia debug.0
$ grep write pygrep.log |wc -l
12


Wish you luck saving your CPU cycles :)

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From walterbyrd at iname.com  Sun May 11 15:04:37 2008
From: walterbyrd at iname.com (walterbyrd)
Date: Sun, 11 May 2008 12:04:37 -0700 (PDT)
Subject: frameword vs application server?
Message-ID: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>

Can somebody help me understand the difference? Not just where Python
is concerned, but in general?

As I understand it, an application server is supposed to be a great
help in developing apps, because most of the business logic is already
there. It seems to me that, usually when applications servers are
discussed, people are talking about Java.

I suppose most popular Python frameworks incorporate an application
server, but I get the idea that those app servers are not nearly as
sophisticed as something like JBoss.

I am not sure if a Python app server, that works like a Java app
server would make sense.


From inhahe at gmail.com  Fri May 16 12:06:00 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:06:00 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
	<695ni3F30u8tgU2@mid.uni-berlin.de>
Message-ID: <5giXj.4881$Kk3.2633@bignews9.bellsouth.net>

I like to learn what I need, but I have done assembly before, I wrote a 
terminal program in assembly for example, with ansi and avatar support.  I'm 
just not fluent in much other than the language itself, per se.

Perhaps C would be as fast as my asm would, but C would not allow me to use 
SIMD, which seems like it would improve my speed a lot, I think my goals are 
pretty much what SIMD was made for.

> I think the right thing to do if you are not as fluent in assembly is do 
> not do anything in it at all. What do you need it for?
>
> Diez 




From castironpi at gmail.com  Tue May 13 05:52:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 02:52:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
Message-ID: <d2586a08-5933-4523-a1f4-7554cc4aad95@t54g2000hsg.googlegroups.com>

On May 13, 4:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Dave Parker wrote:
> > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> >>Yes, I am trying to visualize something.
>
> > If it is related to making furniture comfortable for humans, have you
> > considered painting the furniture with thermochromic paint (
> >http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> > response to temperature, which in part is determined by how hard a
> > body is pressed against it because close contact tends to trap heat.
> > An evenly distributed color might indicated evenly distributed
> > pressure.
>
> Don't let yourself be irritated by castironpi - he's the virtual equivalent
> of a mumbling mad man in this group. Ignorance serves best as remedy - and
> getting a filter to work, as I did (so I only see his postings being
> quoted... a huge relief!)
>
> Diez

I hate to ignore work.  Who is the non-virtual equivalent mumble?


From jaywgraves at gmail.com  Thu May 29 17:44:18 2008
From: jaywgraves at gmail.com (jay graves)
Date: Thu, 29 May 2008 14:44:18 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <97902d02-d2dd-4ff7-b5d3-d2873c3a68c0@e39g2000hsf.googlegroups.com>

On May 29, 4:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.

Hmmm.  Can you state your problem in a different way?

I find that Python excels at string handling and I've never had to
write a pure character scanner like you are suggesting.  Not to say
that you don't need it, I just think that if you give us a small
example of your data and your expected outcome, it would be easier to
help you.




From turian at gmail.com  Sat May 10 19:09:27 2008
From: turian at gmail.com (Joseph Turian)
Date: Sat, 10 May 2008 16:09:27 -0700 (PDT)
Subject: Find more than one error at once
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
	<68lhqrF2tlavsU1@mid.uni-berlin.de>
Message-ID: <bbfae640-089e-4a2f-9938-a8f6bcde6457@a70g2000hsh.googlegroups.com>

On May 10, 8:13 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> What kind of errors? Syntax-errors? Then use one of the python source
> code analyzers, such as pylint or pychecker.

Great!


From ptmcg at austin.rr.com  Tue May 20 18:16:59 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 15:16:59 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<6102785c-57ef-4bf7-9bd3-394ef6855aa7@z72g2000hsb.googlegroups.com>
Message-ID: <69c5ba92-adc7-4c17-a2b2-fb581e4e776e@c19g2000prf.googlegroups.com>

On May 20, 11:08?am, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > def compress(s):
> > ? ? seen = set()
> > ? ? return ''.join(c for c in s if c not in seen and (seen.add(c) or
> > True))
>
> Slightly nicer is to move the set add out of the conditional...
>
> def compress(s):
> ? ? seen = set()
> ? ? return ''.join(seen.add(c) or c for c in s if c not in seen)
>
> I wouldn't write it this way though :)
>
> --
> Paul Hankin

Thank you, Paul.  I knew I had seen a cleaner version than mine, and I
could not remember how it was done.



-- Paul


From deets at nospam.web.de  Wed May  7 09:36:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 15:36:15 +0200
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>
Message-ID: <68dpjdF2rvl8oU1@mid.uni-berlin.de>

Jetus wrote:

> On May 4, 7:22 am, castiro... at gmail.com wrote:
>> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>> wrote:
>>
>> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com>
>> > escribi?:
>>
>> > > Is there a good place to look to see where I can find some code that
>> > > will help me to save webpage's links to the local drive, after I have
>> > > used urllib2 to retrieve the page?
>> > > Many times I have to view these pages when I do not have access to
>> > > the internet.
>>
>> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>>
>> > --
>> > Gabriel Genellina
>>
>> A lot of the functionality is already present.
>>
>> import urllib
>> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
>> from htmllib import HTMLParser
>> from formatter import NullFormatter
>> parser= HTMLParser( NullFormatter( ) )
>> parser.feed( open( 'main.htm' ).read( ) )
>> import urlparse
>> for a in parser.anchorlist:
>>     print urlparse.urljoin( 'http://python.org/', a )
>>
>> Output snipped:
>>
>> ...http://python.org/psf/http://python.org/dev/http://python.org/links/http://python.org/download/releases/2.5.2http://docs.python.org/http://python.org/ftp/python/2.5.2/python-2.5.2.msi
>> ...
> 
> How can I modify or add to the above code, so that the file references
> are saved to specified local directories, AND the saved webpage makes
> reference to the new saved files in the respective directories?
> Thanks for your help in advance.

how about you *try* to do so - and if you have actual problems, you come
back and ask for help? Alternatively, there's always guru.com

Diez


From robert.kern at gmail.com  Fri May 16 19:50:38 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 16 May 2008 18:50:38 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
Message-ID: <g0l6kf$dhk$1@ger.gmane.org>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])

I'm sorry, you are going to have to be less elliptical. Exactly what do you have 
there? It's certainly not an array, but a tuple of single-element lists each 
containing a single string which can be interpreted as a group of 4 IEEE-754 
single-precision floats. Is this correct? Do you really have single-element 
lists? Some more context would be nice (can the tuple be longer? can the lists 
be longer? can the strings be longer? etc.).

But basically, I would concatenate all of the strings together in the correct 
order and use numpy.fromstring() on the resulting string.

And please, just respond to the list. I read this through GMane, and I don't 
like getting duplicates in my in-box.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From shiningsandy at gmail.com  Mon May 19 05:42:22 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 02:42:22 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
Message-ID: <3a7f52b7-5250-45e6-99cc-cee4ff6073f2@24g2000hsh.googlegroups.com>

On May 19, 1:39 pm, "egl... at gmail.com" <egl... at gmail.com> wrote:
> > but when i run the exe my program in not behaving as
> > it supposed to be.its generating some errors.i dont know why this
> > thing is happening as when i run my script it works fine.can some one
> > put some light here.
>
> There is nothing special in executables produced by py2exe. I mean
> that the debugging strategy is as always. A good start might be in
> adding logging\tracing facilities both to script and the executable.
> Comparing two trace files could give you some clue.

hi here is my code.i wont get any errors when i run this script.it may
not be the best pycode as i am very much new to python development.

import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook2003 application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    for kk in range(len(obj.Items),1,-1):
    #for kk in range(len(obj.Items-1),0,-1):
        #print 'hello'
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        writeData(mailItem,txt_file)

        #print mailItem.OlSaveAsType.olMSG
        #saveCopy(mailItem)
        #print "sender="+mailItem.SenderName+'
SenderEmailId='+str(mailItem.SenderEmailAddress)+'
Time='+str(mailItem.ReceivedTime)
        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)

    txt_file.close()
    '''
    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
    file_zip.write('data.log')
    file_zip.close()
    '''

#function to create a directory
#obviously not a best way :-( but i think can expected this sort of
mistakes from beginners
def createDir():
    path=os.path.abspath("\email")
    if(os.path.exists(path)):
        print "Directory already exists"
    else:
        os.system("md "+path)

#function to save a copy of email
def writeData(mailItem,file):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    getAttachmentInfo(mailItem.Attachments)
    file.write(getHTMLString(dataToWrite))
    #checkStringType(dataToWrite)

def getAttachmentInfo(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        #print "File Name="+atmt.FileName+'
DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
        abc=os.path.isdir(os.getcwd()+'\email')

        if(abc==True):
            print 'directory exists'

        else:
            os.mkdir(os.getcwd()+'\email')

        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)



# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):

    if isinstance(a,str):
       b='not a unicode string'

    else:
        a.encode('utf-8')
        #print 'unicode type'

    return a

#function to save the coopy of an email
#:-( but smhow it generate error whenever i make a call to it
def saveCopy(mailItem):

    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
    print name
    #global outlook_app
    try:
        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
    except BaseException:
        print BaseException

def getHTMLString(b):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+b+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    #print outlook_app.OlSaveAsType.olMSG
    print '=================='
    print dir(outlook_app)
    print '=================='
    inbox_obj=getOutLookFolders(outlook_app)
    print dir(inbox_obj)
    print (inbox_obj.Items)
    #saveCopy(inbox_obj.Items[1])
    getMailContent(inbox_obj)



main()


From python at bdurham.com  Thu May  1 08:30:51 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 01 May 2008 08:30:51 -0400
Subject: Best way to store config or preferences in a multi-platform way.
Message-ID: <1209645051.19782.1250872121@webmail.messagingengine.com>

Lance,

> I am still undecided if the ability for the user to edit the file independently of the program is a good or bad thing.

I prefer user viewable plain (non-XML) text files because:

- easy to make a change in case of emergency
- easy to visually review and search
- easy to version control, diff, and optionally spellcheck
- easy to translate
- easy to generate programmatically
- less opportunity for corruption
- best compression

IMO, the 3 biggest advantages are:
- easy to make field changes in case of emergency
- diff
- less opportunity for corruption

Interesting thread. I'm looking forward to hearing what others say on
this topic.

Regards,
Malcolm


From _karlo_ at _mosor.net_  Wed May 21 19:33:33 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Wed, 21 May 2008 23:33:33 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
Message-ID: <Xns9AA6FDC59536mosornet@161.53.160.65>

Andr? <andre.roberge at gmail.com> wrote in
news:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com: 

> How about something like the following (untested)
> 
> done = False
> while not done:
>   try:
>      some_function()
>      done = True
>   except:
>      some_function2()
>      some_function3()

Sure, that works, but I was aiming for something more elegant and Pythonic 
;).


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From castironpi at gmail.com  Thu May 15 19:43:44 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:43:44 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>
Message-ID: <5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>

On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
>
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > Why can't I write this?
> > > > > --
>
> > > > Because your antecedent is undefined?
>
> > > Of the two ways to play, just to say #define this per se would be a
> > > bad move, but that's one that comes from the wrong group. ?#define is
> > > a big scary macro, that python hasn't been using; it's the one-line
> > > typo. ?Instance:
>
> > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > Use it to render planes in solids.
>
> > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > definitively.- Hide quoted text -
>
> > - Show quoted text -
>
> Definitely. ?But, due, I forgot to complete an example.
>
> > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> in C. ?Python:
>
> life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> exec( life1 )
>
> Where does it go?- Hide quoted text -
>
> - Show quoted text -

I'm supposed to talk about an entropy pool game.  You can tunnel.


From rcdailey at gmail.com  Fri May 30 21:50:13 2008
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 30 May 2008 20:50:13 -0500
Subject: Continuous Timer
Message-ID: <496954360805301850u4ce63746vc8fcc84ad1b72824@mail.gmail.com>

Hi,

Reading through the Python 2.5 docs, I'm seeing a Timer class in the
threading module, however I cannot find a timer object that will
continuously call a function of my choice every XXXX amount of milliseconds.
For example, every 1000 milliseconds I want a function named Foo to be
called. This would continue to happen until I terminate the timer in my main
thread. Thanks for the help.
-------------- next part --------------
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From castironpi at gmail.com  Mon May  5 13:28:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 10:28:53 -0700 (PDT)
Subject: STL multimap
Message-ID: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>

Is multimap just a syntax-checked dictionary of mutable sequences?

Is def( a ): a[:]= [x] a trick or part of the language?  It looks
pretty sharp in variable-width.


From heikki at osafoundation.org  Tue May  6 00:06:31 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Mon, 05 May 2008 21:06:31 -0700
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
	<715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <1-ydnQVfb6vaRILVnZ2dnUVZ_oadnZ2d@comcast.com>

TkNeo wrote:
> ok i have tried around a lot but no luck. I think M2Crypto is my best
> option except it requires a minimum of python 2.4 which i don't have.

M2Crypto requires Python 2.3. There are optional features that require
newer Python. If you run into anything else (=bugs) that does not work
with 2.3, let me know and I'll fix it.

-- 
  Heikki Toivonen


From martin at v.loewis.de  Mon May 12 13:32:09 2008
From: martin at v.loewis.de (=?windows-1252?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 19:32:09 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09m9n$c8h$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
	<482855df$0$14196$9b622d9e@news.freenet.de>
	<g09m9n$c8h$1@theodyn.ncf.ca>
Message-ID: <48287f19$0$14201$9b622d9e@news.freenet.de>

>> See PCbuild/readme.txt.
> 
> I presume that this is PCbuild8.txt

As Christian says: PCbuild/readme.txt are the correct instructions
(and had been since Python 2.0 or so).

> Now, I would like to remove Python 2.5 from VS 2008 but see no obvious
> way of getting rid of it.

You might be able to clear the most-recent-projects list in the registry
somehow, but I personally wouldn't worry - if you open other projects,
this one will scroll off the list eventually.

Regards,
Martin


From ndbecker2 at gmail.com  Wed May 21 11:46:33 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 11:46:33 -0400
Subject: [ctypes] convert pointer to string?
Message-ID: <g11g4p$476$1@ger.gmane.org>

In an earlier post, I was interested in passing a pointer to a structure to
fcntl.ioctl.

This works:

c = create_string_buffer (...)
args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
err = fcntl.ioctl(eos_fd, request, args)

Now to do the same with ctypes, I have one problem.

class eos_dl_args_t (Structure):
    _fields_ = [("length", c_ulong),
                ("data", c_void_p)]
...
args = eos_dl_args_t()
args_p = cast(pointer(args), c_void_ptr).value
fcntl.ioctl(fd, request, args_p)  <<< May fail here

That last may fail, because .value creates a long int, and ioctl needs a
string.

How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
0-terminate string, because the structure may contain '0' values.



From ptmcg at austin.rr.com  Sun May 25 12:32:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 25 May 2008 09:32:39 -0700 (PDT)
Subject: raising an exception when multiple inheritance involves same 
	baseThank
References: mailman.1567.1211722656.12834.python-list@python.org
Message-ID: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>

On May 25, 8:37?am, Michael Hines <michael.hi... at yale.edu> wrote:
> Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
> not multiple inheritance per se I prohibit but only multiple inheritance
> involving more than one HocObject class, I replaced your len(bases) > 1
> test with
> <code>
> ? ? m = False
> ? ? for b in bases :
> ? ? ? if hasattr(b, '__mro__'):
> ? ? ? ? for bb in b.__mro__ :
> ? ? ? ? ? if bb == MetaHocObject.ho :
> ? ? ? ? ? ? if m == True:
> ? ? ? ? ? ? ? raise Exception("Inheritance of multiple HocObject not
> allowed")
> ? ? ? ? ? ? m = True
>
> </code>
> to get
>
> class A(HocObject): pass
>
> class B(object): pass
>
> class C(): pass
>
> class D(C, B, HocObject): pass # ok
>
> class D(C, A, HocObject): pass # fail
>
> When I fold this idea into my code I may even try to eliminate the class
> factory aspect of
> class Foo(hclass(h.Vector))
> in favor of
> class Foo(h.Vector)
>
> Thanks again,
> Michael

Here's a more general version of your testing code, to detect *any*
diamond multiple inheritance (using your sample classes).

-- Paul


for cls in (A,B,C,D):
    seen = set()
    try:
        bases = cls.__bases__
        for b in bases:
            if hasattr(b,"__mro__"):
                for m in b.__mro__:
                    if m in seen:
                        raise Exception("diamond multiple
inheritance")
                    seen.add(m)
    except Exception, e:
        print cls,"has diamond MI"
    else:
        print cls,"is ok"


From dsc at ecs.soton.ac.uk  Wed May 28 11:29:11 2008
From: dsc at ecs.soton.ac.uk (Dave Challis)
Date: Wed, 28 May 2008 16:29:11 +0100
Subject: Any way to loop through object variables?
Message-ID: <483D7A47.3030606@ecs.soton.ac.uk>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,
Just wondering if there's a way to iterate through all variables which
an object has set?

Specifically, I'm using the OptionParser module, which returns an
options object, containing all command line options as object variables.
 I'd like to iterate over these rather than getting at them by name.

Cheers,
Dave
- --
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                            __/|_
 ><>                                       / o   \/|
      Dave Challis           )><>          \_____/\|
____dsc at ecs.soton.ac.uk______(____________________________________________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFIPXpHv26GZvAVVFERAmkaAKDUJuGk8L2nJf8B9b1RaMYpVr9bCwCaAubM
TWdK4AmzAgpKNQxZK3AOB4Q=
=6STh
-----END PGP SIGNATURE-----


From skunkwerk at gmail.com  Sun May 11 12:16:25 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Sun, 11 May 2008 09:16:25 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>

On May 10, 1:31?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> declaimed the following in comp.lang.python:
>
> ? ? ? ? Coming in late...
>
> > On May 9, 12:12?am, John Nagle <na... at animats.com> wrote:
> > >skunkwerkwrote:
> > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > new requests are inserted, like so:
>
> ? ? ? ? <snip>
>
>
>
> > > > queue = Queue.Queue(0)
> > > > ?WORKERS=100
> > > > for i in range(WORKERS):
> > > > ? ?thread = SDBThread(queue)
> > > > ? ?thread.setDaemon(True)
> > > > ? ?thread.start()
>
> > > > the thread:
>
> > > > class SimpleDBThread ( threading.Thread ):
> > > > ? ?def __init__ ( self, queue ):
> > > > ? ? ? ? ? ?self.__queue = queue
>
> ? ? ? ? Note: double-leading __ means "name mangling" -- typically only
> needed when doing multiple layers of inheritance where different parents
> have similar named items that need to be kept independent; a single _ is
> the convention for "don't touch me unless you know what you are doing"
>
> > > > ? ? ? ? ? ?threading.Thread.__init__ ( self )
> > > > ? ?def run ( self ):
> > > > ? ? ? ? ? ?while 1:
> > > > ? ? ? ? ? ? ? ? ? ?item = self.__queue.get()
> > > > ? ? ? ? ? ? ? ? ? ?if item!=None:
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?model = domain.get_item(item[0])
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug('sdbthread item:'+item[0])
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?title = model['title']
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?scraped = model['scraped']
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug("sdbthread title:"+title)
>
> > > > any suggestions?
> > > > thanks
>
> ? ? ? ? <snip>
>
> > thanks John, Gabriel,
> > ? here's the 'put' side of the requests:
>
> > def prepSDBSearch(results):
> > ? ?modelList = [0]
> > ? ?counter=1
> > ? ?for result in results:
> > ? ? ? ? ? ?data = [result.item, counter, modelList]
> > ? ? ? ? ? ?queue.put(data)
> > ? ? ? ? ? ?counter+=1
> > ? ?while modelList[0] < len(results):
> > ? ? ? ? ? ?print 'waiting...'#wait for them to come home
> > ? ?modelList.pop(0)#now remove '0'
> > ? ?return modelList
>
> ? ? ? ? My suggestion, if you really want diagnostic help -- follow the
> common recommendation of posting the minimal /runable (if erroneous)/
> code... If "domain.get_item()" is some sort of RDBM access, you might
> fake it using a pre-loaded dictionary -- anything that allows it to
> return something when given the key value.
>
> > responses to your follow ups:
> > 1) ?'item' in thethreadsis a list that corresponds to the 'data'
> > list in the above function. ?it's not global, and the initial values
> > seem ok, but i'm not sure if every time i pass in data to the queue it
> > passes in the same memory address or declares a new 'data' list (which
> > I guess is what I want)
>
> ? ? ? ? Rather confusing usage... In your "put" you have a list whose first
> element is "result.item", but then in the work thread, you refer to the
> entire list as "item"
>
> > 3) ?the first item in the modelList is a counter that keeps track of
> > the number ofthreadsfor this call that have completed - is there any
> > better way of doing this?
>
> ? ? ? ? Where? None of your posted code shows either "counter" or modelList
> being used by thethreads.
>
> ? ? ? ? And yes, if you havethreadstrying to update a shared mutable, you
> have a race condition.
>
> ? ? ? ? You also have a problem if you are using "counter" to define where
> in modelList a thread is supposed to store its results -- as you can not
> access an element that doesn't already exist...
>
> a = [0]
> a[3] = 1 ? ? ? ?#failure, need to create elements 1, 2, 3 first
>
> ? ? ? ? Now, if position is irrelevant, and a thread just appends its
> results to modelList, then you don't need some counter, all you need is
> to check the length of modelList against the count expected.
>
> ? ? ? ? Overall -- even though you are passing things via the queue, the
> contents being pass via the queue are being treated as if they were
> global entities (you could make modelList a global, remove it from the
> queue entries, and have the same net access)...
>
> ? ? ? ? IOWs, you have too much coupling between thethreadsand the feed
> routine...
>
> ? ? ? ? As for me... I'd be using a second queue for return values...
>
> WORKERTHREADS = 100
> feed = Queue.Queue()
> result = Queue.Queue()
>
> def worker():
> ? ? ? ? while True:
> ? ? ? ? ? ? ? ? (ID, item) = feed.get() ? ? ? ? ? ? ? ? #I leave the queues globals
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #since they perform locking
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #internally
> ? ? ? ? ? ? ? ? model = domain.get_item(item)
> ? ? ? ? ? ? ? ? results.put( (ID, model["title"], model["scraped"]) )
>
> for i in range(WORKERTHREADS):
> ? ? ? ? aThread = threading.Thread(target=worker)
> ? ? ? ? ? ? ? ? #overkill to subclass as there is now no specialized init
> ? ? ? ? ? ? ? ? #and if I really wanted to make the queues non-global
> ? ? ? ? ? ? ? ? #I'd pass them as arguments:
> ? ? ? ? ? ? ? ? # ? ? ? threading.Thread(target=worker, args=(feed, results))
> ? ? ? ? ? ? ? ? #where worker is now
> ? ? ? ? ? ? ? ? # ? ? ? def worker(feed, results):
> ? ? ? ? aThread.setDaemon(True)
> ? ? ? ? aThread.start()
>
> ...
>
> def prepSearch(searches):
> ? ? ? ? modelList = []
> ? ? ? ? counter = 0
> ? ? ? ? for searchItem in searches:
> ? ? ? ? ? ? ? ? feed.put( (counter, searchItem) )
> ? ? ? ? ? ? ? ? counter += 1
> ? ? ? ? ? ? ? ? modelList.append(None) ?#extend list one element per search
> ? ? ? ? while counter:
> ? ? ? ? ? ? ? ? (ID, title, scraped) = results.get()
> ? ? ? ? ? ? ? ? modelList[ID] = (title, scraped)
> ? ? ? ? ? ? ? ? counter -= 1
> ? ? ? ? return modelList
>
> ? ? ? ? The only place counter and modelList are modified are within the
> prepSearch. I'm passing counter out and back to use as an ID value if
> the final results are supposed to be in order -- that way if one thread
> finishes before another, the items can be placed into the list where
> they'd have been sequentially.
>
> ? ? ? ? I can only hope that "domain.get_item" is an activity that is I/O
> bound AND that it supports parallel accesses... Otherwise the above
> workerthreadsseem to be adding a lot of overhead for queue I/O and
> threading swaps for what is otherwise a rather linear process.
>
> ? ? ? ? Perhaps your posts don't reveal enough... Maybe you have multiple
> mainthreadsthat are posting to the worker feed queue (and you were
> using separate mutables for storing the results). In this situation, I'd
> remove the results queue from being a global entity, create one queue
> per main processing thread, and pass the queue as one of the parameters.
> This way, a worker can return data to any source thread by using the
> supplied queue for the return...
>
> Modify prepSearch with:
>
> ? ? ? ? myQueue = Queue.Queue()
> ...
> ? ? ? ? feed.put( (counter, searchItem, myQueue) )
> ...
> ? ? ? ? (ID, title, scraped) = myQueue.get()
>
> Modify worker with:
>
> ? ? ? ? (ID, item, retqueue) = feed.get()
> ...
> ? ? ? ? retqueue.put( (ID, model["title"], model["scraped"]) )
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ? wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

wow.  thanks for the help.
   i seem to have fixed my problem though - it turns out
domain.get_item was not thread safe as it was using the underlying
httplib.  the solution was to create a new connection to the database
for each thread (which is ok as the database is meant to be queried in
a massively paralell fashion).  the missing part of the code included
a part where i inserted the results at the given position into the
list.

the only issue i have now is that it takes a long time for 100 threads
to initialize that connection (>5 minutes) - and as i'm doing this on
a webserver any time i update the code i have to restart all those
threads, which i'm doing right now in a for loop.  is there any way I
can keep the thread stuff separate from the rest of the code for this
file, yet allow access?  It wouldn't help having a .pyc or using
psycho, correct, as the time is being spent in the runtime?  something
along the lines of 'start a new thread every minute until you get to a
100' without blocking the execution of the rest of the code in that
file?  or maybe any time i need to do a search, start a new thread if
the #threads is <100?

thanks again


From sn at sncs.se  Tue May 27 07:14:30 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 04:14:30 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
	<31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com>
Message-ID: <0e67df2c-43c1-4b1f-8220-52556a316595@79g2000hsk.googlegroups.com>

I had bothered. Volunterly that is too. Becausa I care.

Should we piss of about py3k? It's a debate.

Guiod wrote also something he got from Ruby: "Open source need to
change or die"

If I recall correctly. I cant get too bothered for I get tired too.

But change is not == progress.

Sometimes it is like in the 70s here when we had even worse economy
"Well, at least it gives some work opportunities"

Think about it. It is Less work that is the ideal, the thing to strive
for
Not More work - it may look to give more money but it is really not
economic

So is it this the way ? No ? It ain't broken so lets brake it

S


On May 27, 10:15 am, alex23 <wuwe... at gmail.com> wrote:
> On May 27, 5:47 pm, Sverker Nilsson <s... at sncs.se> wrote:
>
> > Dont make they functions. Or is this just to throw us out?
>
> Have you even bothered to read the reasoning for this change since the
> last time you got your knickers twisted over it?
>
> http://www.python.org/dev/peps/pep-3105/#rationale
>
> I don't see "piss everyone off" listed there anywhere.
>
> Personally, I believe if you're writing code of any serious length,
> you generally shouldn't be using 'print' anyway, using the logging
> module allows for a lot more flexibility.
>
> If you're bothered by having to type the parentheses while in the
> interpreter, try using IPython with it's autocall mode turned on.



From paul at floorball-flamingos.nl  Wed May  7 13:30:12 2008
From: paul at floorball-flamingos.nl (Paul Melis)
Date: Wed, 07 May 2008 19:30:12 +0200
Subject: letter frequency counter / your thoughts..
In-Reply-To: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <4821e745$0$24414$5fc3050@news.tiscali.nl>

umpsumps at gmail.com wrote:
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..

Not bad for a beginner I think :)

> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res
> 
> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1
> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]
> 
> thanks much!!

Slightly shorter:

def mostfreq(strng):
     dic = {}
     for letter in strng:
         if letter not in dic:
             dic[letter] = 0
         dic[letter] += 1
     # Swap letter, count here as we want to sort on count first
     getvals = [(pair[1],pair[0]) for pair in dic.iteritems()]
     getvals.sort()
     return getvals[-3:]

I'm not sure if  you wanted the function mostfreq to return the 3 most 
frequent letters of the first 3 letters? It seems to do the latter. The 
code above uses the former, i.e. letters with highest frequency.

Paul


From semanticist at gmail.com  Wed May  7 20:53:06 2008
From: semanticist at gmail.com (Miles)
Date: Wed, 7 May 2008 20:53:06 -0400
Subject: class definition
In-Reply-To: <K5rUj.249337$pM4.157639@pd7urf1no>
References: <K5rUj.249337$pM4.157639@pd7urf1no>
Message-ID: <a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4@mail.gmail.com>

On Wed, May 7, 2008 at 7:40 PM, Yves Dorfsman <yves at zioup.com> wrote:
> Does it make a difference if you put subclass object or not ?
>
>  What is the difference between c1 and c2 here:
>
>  class c1:
>   pass
>
>  class c2(object):
>   pass

>>> type(c1)
<type 'classobj'>
>>> type(c1())
<type 'instance'>
>>> type(c2)
<type 'type'>
>>> type(c2())
<class '__main__.c2'>

In Python 2.2, classes and types were unified.  If a class inherits
from object (or any other built-in), it is considered a "new-style"
class; otherwise, it is an old-style (or classic) class.  There are
some differences in their behavior; most notably, descriptors
(computer properties) will not work with old-style classes.  Old-style
classes will go away in Python 3 (I think), and all classes will have
object as a base.

An introduction to new-style classes:
http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html
A guide to descriptors:
http://users.rcn.com/python/download/Descriptor.htm
The reference manual on the distinction:
http://docs.python.org/ref/node33.html
The technical explanation:
http://www.python.org/download/releases/2.2.3/descrintro/

-Miles


From tinnews at isbd.co.uk  Sun May 25 10:24:55 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 25 May 2008 14:24:55 GMT
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
	<08424ab8-e5c4-4aca-a492-1410e56f38a2@y38g2000hsy.googlegroups.com>
Message-ID: <483976b7$0$658$bed64819@news.gradwell.net>

Mike Driscoll <kyosohma at gmail.com> wrote:
> On May 23, 1:59?pm, tinn... at isbd.co.uk wrote:
> > I'm desperately trying to move a Microsoft Access database application
> > (a simple accounts system I wrote myself) to Linux. ?Python is one of
> > my preferred programming laguages so I wonder if there are any good
> > Python 'frameworks' for writing database applications, in particular I
> > need good reporting and forms writing facilities. ?The basic database
> > and logic/arithmetic seem fairly simple to me.
> >
> > --
> > Chris Green
> 
> You might take a look at Dabo. It's made for databases and is pretty
> cool.
> 
> http://dabodev.com/
> 
> Not sure what else is out there.
> 
Dabo looks very interesting, thank you!

-- 
Chris Green


From gnewsg at gmail.com  Sat May  3 13:27:12 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 3 May 2008 10:27:12 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
	<roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <81e98a78-bc50-4800-981d-908bf14305bb@z72g2000hsb.googlegroups.com>

On 3 Mag, 05:38, Roy Smith <r... at panix.com> wrote:

> In the application I work on, we've avoided this. ?We just listen on two
> separate sockets (one for each address family). ?We wrote a DualSocket
> class which manages the two underlying single-protocol sockets and makes
> them appear to be a single dual-protocol socket. ?It was a lot of user code
> to write, compared with using the mapped address mechanism, but at least
> it's portable to every OS we've seen that support IPv6.
>
> You don't need multi-threading to handle multiple sockets. ?In our
> implementation, for example, we use select() in a single thread to
> multiplex the two.

I would be very interested in taking a look at how you implemented
that part of code. Would it be possible?
For now I wrote this and it seems to work just fine.
Any advice about it?



class FTPServer(asyncore.dispatcher):

    def __init__(self, address, handler):
        """Initiate the FTP server opening listening on address.

         - (tuple) address: the ip:port pair on which to listen
            for ftp data connections.
         - (classobj) handler: the handler class to use.
        """
        asyncore.dispatcher.__init__(self)
        self.handler = handler
        host, port = address
        for res in socket.getaddrinfo(host, port, 0,
socket.SOCK_STREAM):
            af, socktype, proto, canonname, sa = res
            try:
                self.create_socket(af, socket.SOCK_STREAM)
            except socket.error, msg:
                if self.socket:
                    self.socket.close()
                self.socket = None
                continue
            break
        if not self.socket:
            raise socket.error, msg
        self.address_family = af

        if os.name not in ('nt', 'ce'):
            self.set_reuse_addr()
        self.bind(address)
        self.listen(5)

    def handle_accept(self):
        sock_obj, addr = self.accept()
        log("[]%s:%s Connected." %addr[0:2])
        handler = self.handler(sock_obj, self)


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From martin at v.loewis.de  Mon May 12 14:05:17 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 20:05:17 +0200
Subject: Cannot run Python 3.0a5 )-:
In-Reply-To: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
References: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
Message-ID: <482886dd$0$1500$9b622d9e@news.freenet.de>

> Hi, I just tried to install Python 3.0a5 an another Windows PC. I did
> what I have done yesterday at home:
> 
> 1. Downloaded the daily snapshot http://svn.python.org/snapshots/msi/python-3.0.14011.msi
> 2. Installed to C:\Python30
> 3. Added C:\Python30 to the Path environment for all users.
> 
> when I run python from the command line, it says: The system cannot
> execute the specified program.
> 
> I don't understand this.

What happens if you invoke the full command line path?
Can you check the event log for messages?
What operating system are you using?

Regards,
Martin


From miki.tebeka at gmail.com  Wed May  7 19:54:13 2008
From: miki.tebeka at gmail.com (Miki)
Date: Wed, 7 May 2008 16:54:13 -0700 (PDT)
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <ad2861dc-d9fd-4ad4-aa3d-1e401e581cab@b9g2000prh.googlegroups.com>

Hello,

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
> ? ?# How do I do the following line?
> ? ?if key not in second_dict or if it is, but has has the wrong value,
> then let me know
def cmp_dicts(first, second):
    return sorted(first.iteritems()) == \
           sorted(((k[1], v) for k, v in second.iteritems()))

Google for DSU (Decorate-Sort-Undecorate)

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com




From bj_666 at gmx.net  Thu May  8 23:54:44 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 May 2008 03:54:44 GMT
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
Message-ID: <68i084F2su97jU4@mid.uni-berlin.de>

On Thu, 08 May 2008 23:35:04 +0200, Hrvoje Niksic wrote:

> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
> 
>> On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>>
>>> The thing is, I'm not using slots by choice.  I'm using the standard
>>> lib "socket" class, which apparently uses slots.
>>
>> `socket` objects can't be pickled.  Not just because of the
>> `__slot__`\s but because a substantial part of their state lives in
>> the operating system's space.
> 
> Of course, if it makes sense to pickle sockets in the application, one
> is can do so by defining __getstate__ and __setstate__:

When does it make sense!?

> class Connection(object):
>     def __init__(self, host, port):
>         self.host = host
>         self.port = port
>         self.init_sock()
> 
>     def init_sock(self):
>         self.sock = socket.socket()
>         self.sock.connect((host, port))
>         ... init communication ...

But if you unpickle it while the original connection is still open it
can't connect.  If it's not open anymore, there's no one answering at
host/port anymore or some program that has no idea what this connection
is all about.

Ciao,
	Marc 'BlackJack' Rintsch


From castironpi at gmail.com  Tue May  6 10:55:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 07:55:58 -0700 (PDT)
Subject: parameters to lambda's executed at run time.
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
	<68apjeF2r9b93U2@mid.uni-berlin.de>
Message-ID: <71f26e73-80e6-4471-9d84-1b58035e2a9d@f36g2000hsa.googlegroups.com>

On May 6, 5:17?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> wyleu wrote:
> > I'm trying to supply parameters to a function that is called at a
> > later time as in the code below:
>
> > llist = []
>
> > for item in range(5):
> > ? ? llist.append(lambda: func(item))
>
> > def func(item):
> > ? ? print item
>
> > for thing in llist:
> > ? ? thing()
>
> > which produces the result
>
> > IDLE 1.2.1
> >>>> ================================ RESTART
> >>>> ================================
>
> > <function <lambda> at 0xb716356c>
> > <function <lambda> at 0xb71635a4>
> > <function <lambda> at 0xb71635dc>
> > <function <lambda> at 0xb7163614>
> > <function <lambda> at 0xb716364c>
> >>>> ================================ RESTART
> >>>> ================================
>
> > 4
> > 4
> > 4
> > 4
> > 4
>
> > How can one allocate a different parameter to each instance of the
> > function rather than all of them getting the final value of the loop?
>
> That's a FAQ. Python creates a closure for you that will retain the last
> value bound. To prevent that, you need to create a named paramter like
> this:
>
> lambda item=item: func(item)
>
> That will bind the current item value at the lambda creation time.
>
> Diez- Hide quoted text -
>
> - Show quoted text -

I am getting lambda creation-time bindings on 2.5.

>>> g= [ lambda h= i: h for i in range( 10 ) ]
>>> [ e( ) for e in g ]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

>>> g= [ lambda: i for i in range( 10 ) ]
>>> [ e( ) for e in g ]
[9, 9, 9, 9, 9, 9, 9, 9, 9, 9]


From jacob at cd.chalmers.se  Sun May 18 07:38:43 2008
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Sun, 18 May 2008 11:38:43 +0000 (UTC)
Subject: Psyco alternative
References: <mailman.2463.1206629079.9267.python-list@python.org>
	<a03264a0-a11f-49d9-96c6-b56a82c0348c@56g2000hsm.googlegroups.com>
Message-ID: <g0p4g3$l5k$1@gide.ita.chalmers.se>

In article <a03264a0-a11f-49d9-96c6-b56a82c0348c at 56g2000hsm.googlegroups.com>,
sturlamolden  <sturlamolden at yahoo.no> wrote:
>On Mar 27, 4:44 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
>> PyPy is self-hosted and has been for some time (a year or so?).
>
>This is technically not correct. PyPy is hosted by RPython, which is
>not Python but a different language all together.

This is pure FUD! PyPy is written in RPython, which is a pure subset of Python,
designed for writing interpreters in such a way that they can be translated into
source code for a static language and then compiled to machine code.

The translation toolchain, written in Python is used to create a binary image,
which is a full interpreter for the Python language. This binary image can
run the toolchain to generate another, identical binary image, which of course
also is a a full interpreter for the Python language.

This makes PyPy self hosting in every sense of the word.

The fact that the interpreter is written in RPython and actually runs as an interpreted
program under CPyton or a compiled PyPy is a useful implementation detail, adding
yet another aspect of self hosting that is not present in other systems that claim
to be self hosting.

PyPy btw, is alive and well. Work is progressing along 3 major fronts. One is supporting
real world applications, where we recently added support for ctypes and where we
are working on ensuring that a number of popular modules and frameworks run under PyPy.
Another major undertaking has been to improve execution speed without the JIT. We can
report that we are faster than CPython on some benchmarks, while slower on others. On the
average, I'd say that we still have some catching up to do. The third avenue that
is being pursued is the JIT. While a huge refactoring has been finished and the
results look very good, there are still many months of work to do before the
JIT can be used in production.

Jacob Hall??n

-- 


From gherron at islandtraining.com  Sun May 11 16:38:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 13:38:45 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <HNHVj.32518$KJ1.10846@newsfe19.lga>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>	<m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <48275955.4000106@islandtraining.com>

bc90021 wrote:
>> ...and the exact error message was?
>>
>> Here is a tip: if you want people to help you, then you have to help
>> them to help you.  Personally, I wouldn't respond to anymore of your
>> questions because you seem incapable of posting the information that was
>> requested.
>>     
>
> So far, the people who have answered this post have gone on the 
> assumption that I'm stupid.  I'm not.  I took perfectly working code, 
> cut it from one class, and put it in another.  It stopped working in the 
> second class.  I've spent days on this and trust me, given what I've 
> experienced of the Python community so far, if I didn't have to ask, I 
> wouldn't.
>
> (I really must say that so far the help I am getting in the Python 
> community is a big let down.  Whether it's on IRC or here, everyone has 
> an arrogance that I don't find anywhere else in the open source 
> community, and it seriously makes me question the choice of language that 
> I've made.)
>   

Sorry, the arrogance is yours. 

    Expecting us to help with only partial information.

    Expecting us to help when your posts of the error message changes 
from one post to the next.

    Expecting us to help when you refuse to post the traceback.

    Expecting us to believe that it has anything to do with threads.  
(No one believes that for a moment.)


While acknowledging that any piece of code may have bugs, Python's 
threading included, the problem here looks to be some simple mistake in 
the computation of the name of the file to be opened.   Then I look at 
the convoluted quoting surrounding your computation of the file name, 
and my confidence in that as an explanation sky-rockets.  Then someone 
in another post has found an extra set of quotes embedded in your 
filename you compute, and it's clear that we are on the right track.



> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From martin at v.loewis.de  Sat May  3 04:16:50 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 03 May 2008 10:16:50 +0200
Subject: IPv6 and Python
In-Reply-To: <80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
Message-ID: <481c1f73$0$18423$9b622d9e@news.freenet.de>

> Thanks a lot. I've been able to listen on ::1:21 after having
> installed IPv6 on both Windows and Linux thanks to your suggestions.
> I'd like to ask one more question: is it possible to bind my server on
> both IPv4 and IPv6 addresses (note: I do not use multiple threads or
> processes)?

You can, of course, open two sockets, and bind one for IPv4 and one for
IPv6. If you then want to use a single thread only, you need to use
poll/select, which will return when there is an incoming connection on
either socket. You then accept() the new connection for the respective
listen socket.

There is a notion of "mapped" IPv4 addresses, which allows to have a
single IPv6 server socket accept both IPv4 and IPv6 connections.
How this precisely works depends on the operating system.

On Linux, "mapped" addresses are the default. Open a v6 socket, and
connect to it through a v4 client, and it will just work. For this,
you need to specify the "any" server address, i.e.

py> s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
py> s.bind(('', 1234))
py> s.listen(100)
py> s.accept()
(<socket._socketobject object at 0xb7d90304>, ('::ffff:77.132.228.129',
43491, 0, 0))
py> s.accept()
(<socket._socketobject object at 0xb7d90bc4>, ('2001:6f8:900:a85::2',
40800, 0, 0))

The first connection was from a v4 client; the second connection from
a v6 client. To *disable* mapped addresses, you need to set the
IPV6_V6ONLY socket option to 1.

On Windows XP (including SP2), mapped addresses are not supported.

On Windows Vista, mapped addresses are supported, but you have
to explicitly *enable* a socket for mapped use, by setting
the IPV6_V6ONLY option to 0.

So in short, you should always set the IPV6_V6ONLY to 0, as the
system defaults vary. If that option is not defined in the socket
module, the system does not support mapped sockets.

Unfortunately, there is an exception to the last rule: on Vista,
the option is supported, but Python won't magically know what the
option numeric value is. So on Windows, you need to define
IPV6_V6ONLY yourself (the value is 27), and check whether the
setsockopt call succeeds.

Regards,
Martin


From dickinsm at gmail.com  Mon May 12 12:38:06 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Mon, 12 May 2008 09:38:06 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
	<caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>
Message-ID: <4f10b3e8-065b-4592-9b62-7678bcafb137@27g2000hsf.googlegroups.com>

On May 12, 11:15?am, Arnaud Delobelle <arno... at googlemail.com> wrote:

> But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
> which is not the x=0 axis (I think at least - it seems easy to prove
> that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
> f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).

Agreed.  And this makes an excellent argument that if you're going to
choose a number for 0.0**0.0 then it's got to be 1.  But I still don't
find it completely convincing as an argument that 0.0**0.0 should be
defined at all.

> This should cover most practical uses?

Maybe.  But if you're evaluating x**y in a situation where x and y
represent physical quantities, or otherwise have some degree of error,
then you probably want to be warned if x and y both turn out to be
zero.


I seem to be digging myself into a hole here.  I'm personally
firmly in the "0**0 should be 1" camp, and always have been---
there are just too many practical benefits to defining 0**0==1
to ignore, and in the case where you're interested in integer
exponents anything else is just plain wrong. The lack of
continuity of the power function at (0,0) seems a small
price to pay.

Mark


From Sizer at nospam.com  Tue May  6 23:12:02 2008
From: Sizer at nospam.com (Sizer)
Date: 6 May 2008 22:12:02 -0500
Subject: Can't drag and drop onto .py in Windows XP?
Message-ID: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>

I have several python utils that look at sys.argv to get a list of 
filenames to process and mangle the files in various ways. If I have a 
bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and 
bar.bat gets called with foo.avi as an argument, everyone's happy. But if I 
have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a big 
NO cursor and nothing happens.

Now I can work around this by creating a _bar.bat and having the _bar.bat 
call bar.pyw with the filenames it was passed (this is obviously 
ridiculous). Or I can create a shortcut which has the target of
   c:\python25\pythonw.exe c:\mybar\bar.pyw
and that works, but makes telling people how to install my utilities on 
their computer a pain in the rear. It's just a little weird that I can't 
just drag and drop file names onto .pyw or .py files. Am I missing 
something here?

Thanks for any help.


From saluk64007 at gmail.com  Tue May 27 02:22:20 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 23:22:20 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
Message-ID: <c3f69bf60805262322x28f281b1x7161e25287c2f721@mail.gmail.com>

I don't know if my posts are making it to the list, or if they are blocked
or what.  I have posted twice mentioning Spyce (
http://spyce.sourceforge.net/) to you but no one seems to respond to me.
Maybe if I send to you directly?  Spyce has been around a while but hasn't
been updated in a few years.  It's exactly what you want, and the first
python framework I used.

And as I said in a previous post, if you use cherrypy as your controller,
it's not that hard to write a directory access mechanism, and then you can
pretty easily work a system with templates to act like you want.  (You just
have to choose a template system you like and hook it up yourself).  The
whole thing shouldn't be more than about 15 lines of code to set up.

I hope this goes through...
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From timr at probo.com  Wed May 28 03:44:45 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 07:44:45 GMT
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <t43q34he184598aom7d8k0c5856c7jmtfl@4ax.com>

Jean-Claude Neveu <jcn-france1972 at pobox.com> wrote:
>
>I am writing a Python program to check email using POP3. I've tried 
>the sample code from python.org, and it works great. In other words, 
>the code below successfully prints out my emails.
>
>import getpass, poplib, email
>M = poplib.POP3('mail.blah.com')
>M.user('username')
>M.pass_('password')
>numMessages = len(M.list()[1])
>for i in range(numMessages):
>     for j in M.retr(i+1)[1]:
>         print j
>M.quit()
>
>However, if I understand right, the Python poplib library will also 
>parse the email for me so that I can iterate through the headers, 
>body, etc, of each message, and use them in my program. I think the 
>method I need to use is email.message_from_file, but I'm having 
>difficulty getting it to work. Can anyone explain me how I would 
>extend the above example to do this?
>
>I tried to do this by using in the i loop the line:
>
>	message = email.message_from_file(j)
>
>but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

You've received some very confusing advice in this thread.  Alex had the
right answer, but I want to expand it a bit.

You said "the Python poplib library will also parse the email for me". This
is incorrect.  poplib, like many of the modules of the Python standard
library, focuses on exactly one purpose: handling the POP3 protocol.  It
will allow you to count your messages, and fetch your messages, but that's
it, because that's all that POP3 does.  It's a very simple protocol.

Now, the standard library DOES include modules for parsing email, as you
seem to realize.  The "email" module is a very sophisticated tool for that
purpose.  However, the email module doesn't have any way to fech the mail.
So, you need to stitch them together.

poplib.retr gives you a string.  You need to hand that string to the email
module, and you do that using "email.message_from_string".
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From skanemupp at yahoo.se  Thu May 15 12:53:29 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:53:29 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
	<mailman.1179.1210870311.12834.python-list@python.org>
Message-ID: <b33dc5a2-a980-4309-853c-0c28b193b520@l42g2000hsc.googlegroups.com>

On 15 Maj, 18:33, "Andreas Tawn" <andreas.t... at ubisoft.com> wrote:
> >import os
>
> >print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> >d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> >d.readline()
>
> >returns true in the shell but prints no text even though the document
> >contains text.
>
> >d.name returns nothing, d.name() raises an error.
> >--
> >http://mail.python.org/mailman/listinfo/python-list
>
> Try...
>
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> for line in d:
>         print line
>
> And I'm guessing that's a typo in flim.txt?
>
> Cheers,
>
> Drea

nah no typos i figured this out


From skanemupp at yahoo.se  Fri May 16 09:07:18 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:07:18 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
Message-ID: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>

On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> globalrev a ?crit :
>
> > wassup here?
>
> > 7
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > <module>
> >     print cust1.getID()
> > AttributeError: 'NoneType' object has no attribute 'getID'
>
> > class customer:
>
> 1/ naming convention : class names should be CamelCased
> 2/ unless you need compatibility with years old Python versions, use
> newstyle classes
>
> class Customer(object):
>
> >     def __init__(self, ID, movies):
> >         self.ID = ID
> >         self.movies = movies
>
> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>
>      def __init__(self, id, movies):
>          self.id = id
>          self.movies = movies
>
> >     def getID():
> >         return self.ID
>
> >     def getMovies():
> >         return self.movies
>
> 4/ Python has support for computed attributes, so you just don't need
> these getters.
>
>
>
> > import os
> > import customer
> > import movie
>
> > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > mv1str = mv1.read()
>
> > print mv1str.count(',5,')
>
> > cust1 = customer.__init__('12',['1','435','2332'])
>
> __init__ is automagically called on instanciation, so you don't have to
> call it yourself. And FWIW, your __init__ returns None.
>
> cust1 = Customer('12', ['1', '435', '2332'])
>
> > print cust1.getID()
>
> print cust1.id


what should init return normally? a customer-object?

class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies
        return self


?


From vlastimil.brom at gmail.com  Wed May 14 20:00:33 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Thu, 15 May 2008 02:00:33 +0200
Subject: suggestions on code structuring? (classes; gui, data, methods...)
Message-ID: <9fdb569a0805141700t42bad9c3l2fed54f82be0abb2@mail.gmail.com>

Hi all;
I'd like to ask for suggestions regarding the appropriate structure of the
code of my app. It is a gui program (wxPython; wx.aui) displaying several
texts simultaneously. The user interface consists of multiple text widgets
and control panels for selecting the text parts and synchronising.
Basically the program reads several text files, analyses them, displays them
in the text controls and keeps track of some aditional indexing information
(used for synchronising the text with each other etc.

What would be an usual way of structuring the code? I tried to separate
distinct tasks to classes, but I am not sure, if this is the right way:
Currently I have a TextDB class containing the functions to parse the source
text, then it stores the resulting fulltext, the indexing data; it also
contains lookup methods for the text properties and also a display method
(expecting a gui widget to write into). There is one instance of this class
associated with each text.
Further there is an instance of a gui class (subclassing the wx.Panel -
TextCtrl and some basic controls) for each text; besides this there are also
panels with specific settings/selections of the individual texts. All this
is managed in a frame using wx.aui.AuiManager (the panes can be moved or
hidden, but in general, there might be over a dozen of panels used
simultaneously on the screen).

Now, what would be a standard approach to let the single instances
comunicate with each other? Is it usual, that the "data" instances are
created by the gui instances (or the main program class)? Or would
it be better to create an extra "dispatch" class communicating with the
others? (Here e.g. the user can select some text-property in the control
panel, this value is then checked in the respective TextDB instance; finally
the matching text part is shown in the text widget.)
Unfortunately, I couldn't find many relevant code examples or general
informations; actualy many tutorial etc. gui programs often have ratner few
classes, sometimes the only one.

Any suggestions, or references to some examples, concepts ... are much
appreciated;
thanks in advance;
      Vlasta
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From rocco.rossi at gmail.com  Fri May 16 10:06:05 2008
From: rocco.rossi at gmail.com (rocco.rossi at gmail.com)
Date: Fri, 16 May 2008 07:06:05 -0700 (PDT)
Subject: Variable by label
Message-ID: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>

Is there any function which will return a variable by passing to it
the string containing the variable's name? Something like this for
instance:

foo = some_function("foo")

or perhaps it's a dictionary. I don't know, but I would really like to
find out how it can be done. I guess it is achievable.

Thank you.


From hat at se-162.se.wtb.tue.nl  Fri May 16 04:03:44 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 10:03:44 +0200
Subject: default object comparison considered harmful?
Message-ID: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>

Hello all,

Yesterday we found the cause of a bug that has caused problems for a long time.
It appeared to be the following:

class A(object):
    pass

print min(1.0, A())

which is accepted by Python even though the A() object is not numerical in
nature.

The cause of this behavior seems to be the compare operation of the object
class.


Is there a way to disable this behavior in Python (other than deriving a new
'object-like' class that doesn't do comparisons?)


Sincerely,
Albert


From afrobeard at gmail.com  Tue May 13 18:48:38 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:48:38 -0700 (PDT)
Subject: built in list generator?
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
	<68uba1F2ur7lkU1@mid.uni-berlin.de>
Message-ID: <96f76198-7120-4d59-8ab8-fa46aa2c70d3@t54g2000hsg.googlegroups.com>

range(50,100,2) returns a list of numbers starting from 50 and less
than 100 with a step size of 2.

list() takes any iterable datatype and converts it into a list.

e.g. list((1, 2, 3)) would return [1,2,3]
& list([1, 2]) would return [1,2]

In this case there is no point of calling range within list since the
output of range is already a list.

Note list(xrange(50,100,2)) would have made sense if range didnt exist
and you needed a list, but since range does exist, I dont see the
point.

Diez is right when he says to use list to iterate, because creating a
big list just for the sake of iteration would be a terrible waste of
space.

On May 14, 1:16?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev schrieb:
>
> > if i want ?a list with all numbers between x and y is there a way to
> > do this with an inbult function.
>
> > i mean i can always construct a function to do this but is there
> > soemthing like:
>
> > nbrs = list(range(50,100, 2))
>
> range *does* that. use xrange if all you want is to iterate.
>
> Diez



From eliben at gmail.com  Mon May 26 11:49:05 2008
From: eliben at gmail.com (eliben)
Date: Mon, 26 May 2008 08:49:05 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
Message-ID: <d371eade-7683-4007-8015-b752de2af6dd@34g2000hsh.googlegroups.com>

On May 25, 5:40 pm, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a small wxPython application. Today I was trying to add some
> RPC capability to it, so I implemented an instance of
> SimpleXMLRPCServer that runs in a separate thread when invoked and
> answers requests.
>
> All went fine until I realized that I have to sometimes stop the
> server - which is where I ran into a problem. Python threads can not
> be killed after they've been started. They can be kindly requested to
> end, but it's up to the thread itself to decide when it wants to
> finish. At least this is my understanding. It probably makes sense,
> because threads can hold resources which can't just be dropped
> suddenly, and have to be cleaned in a proper manner. (Does this sound
> like the truth ?)
>
> Anyway, this creates a problem because SimpleXMLRPCServer likes to
> block and never return. I dug deeper and found out that all offspring
> of SocketServer can only handle requests in a blocking manner. Even if
> you call handle_request( ) and not serve_forever(), it will block
> until a request is received and handled. This means that a
> SocketServer object running in a thread blocks the thread, and this
> thread can not be stopped.
>
> Is there any graceful solution to this problem ?
>
> I suppose I can use sockets in non-blocking mode, or use select(), but
> this will mean I will have to implement my server with raw sockets and
> not a handy helper like SocketServer. For the XML-RPC server I want
> this is a headache, as I will probably have to implement my own XML-
> RPC server based on raw non-blocking sockets.
>
> Thanks in advance for any ideas and suggestions
> Eli


I ended up using an ugly hack to make it work for me. Since
handle_request() only blocks until a request is received, the thread
can be unblocked by sending it a real message. So to stop a server, I
opened a XML-RPC client connection (using ServerProxy from xmlrpclib)
and made a request. In the server thread, handle_process() returned
and the thread could see the flag requesting it to stop.

There must be a better way ! Any ideas ?

Eli




From max at alcyone.com  Fri May  2 14:26:50 2008
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 02 May 2008 11:26:50 -0700
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87fxt0zs92.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <g_OdnTvuTbdxwYbVnZ2dnUVZ_g6dnZ2d@speakeasy.net>

Ben Finney wrote:

> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.

Yes, and that's the reason the env form is preferred.  If someone -- 
either the system administrator, or the user environment, or the person 
executing the program on the fly -- has changed the PATH, they did it 
for a reason.  If /usr/local/bin is in the PATH before /usr/bin, then 
that is a deliberate choice (whether system-wide or not) to prefer 
executables in /usr/local/bin to those in /usr/bin, and that is being 
done for a very conscious reason.  Which is why the PATH exists in the 
first place, and why invoking the script with env is preferable.


-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From skipjack317 at clearwire.net  Sat May 31 19:59:09 2008
From: skipjack317 at clearwire.net (oregon skip)
Date: Sat, 31 May 2008 16:59:09 -0700 (PDT)
Subject: disappearing interpreter
Message-ID: <a273de89-2f33-4e13-8ca4-0dd1674b1fc7@w4g2000prd.googlegroups.com>

I am a new Python programmer, using Windows XP, IDLE and the
interpreter. Everything is
OK except that when I double check a name.py file it runs on the
interpreter, but the
window disappears before I can see what happened. Any suggestions?


From petr.poupa at gmail.com  Wed May  7 11:03:35 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Wed, 7 May 2008 08:03:35 -0700 (PDT)
Subject: listening on TCP port
Message-ID: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>

Hello,
is there anybody who has experience with listening on TCP port with
python? I am looking for anything codes, tutorials,... .
Thanks for any information


From maxerickson at gmail.com  Wed May  7 12:35:49 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 7 May 2008 16:35:49 +0000 (UTC)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
	<fvsj6s$n87$1@ger.gmane.org>
Message-ID: <Xns9A978027C1668maxericksongmailcom@80.91.229.13>

WolfgangZ <wollez at gmx.net> wrote:

> parag_paul at hotmail.com schrieb:
>> hi All,
>> http://mail.python.org/mailman/listinfo/python-list
>> 
> At least I'm living in a free country and nobody forces me to
> learn python. So I don't fully understand why you HAVE TO learn
> it. When your problems can be solved in a different programming
> language than you should be free to use whatever you like. And
> also why should it be forbidden to create a new programming
> language? Diversity and competition is usually not bad.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

I imagine that there is some English as a second language getting 
involved and the intent of the question was more like "What is 
python useful for on Windows?", which has pretty much the same 
meaning but is open to a slightly friendlier interpretation(i.e., 
tell me how I can use python instead of tell me why I should use 
python).

The other question might be more like "I already know VBS, what do I 
gain by learning python?".

(the answers could be "lots of things, including full applications" 
and "among other things, you can use it on other platforms, and you 
might prefer the syntax".)


max



From Lie.1296 at gmail.com  Wed May 14 00:06:41 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 21:06:41 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <007939c6-9fe7-462d-a8fc-e847d43cf50c@f24g2000prh.googlegroups.com>

On May 13, 11:20?pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > 5-10 times faster for what kind of code?
>
> Mostly numerical analysis and CGI scripting. ?All of Flaming Thunder's
> library code is in assembly language, and Flaming Thunder creates
> statically-linked pure syscall CGI scripts.
>
> > I don't see anything that resembles OO features of python, ...
>
> True. ?But in Python, you don't see statically-linked pure-syscall CGI
> scripts being cross-compiled under Windows for ftp'ing up to a Linux
> server. ?And you don't see the speed of pure assembly language
> libraries. ?And I'll be willing to bet that Flaming Thunder will have
> OO features similar to Python before Python has the features that
> Flaming Thunder already does.
>
> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year. ?But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

I don't think so, even Microsoft, the huge money netter, realized that
nobody would use their new .NET framework if they don't provide free
compilers for it, they only sold their IDE, not their compilers (did I
mention that the Visual Studio Express is free as in beer? And Express
isn't a crippled compiler)

> > And what is really expensive is brain-cycles, not cpu-cycles.
>
> Depends on whether you're the programmer, or the customer. ?I've found
> that customers prefer products that are 5 to 10 times faster, instead
> of products that were easy for the developer.
>
> And I disagree that Flaming Thunder requires more brain-cycles.
> Because it's based on leveraging existing English and math fluency
> (which was one of the original goals of Python, was it not?), I think
> that Flaming Thunder requires fewer brain-cycles because fewer brains
> cells have to be devoted to memorizing language peculiarities.

You keep mentioning that the original goals of Python is to "make it
English-like", well, I can say, you are wrong. The goals of  Python is
to make a usable language that have a clean and clutter-free syntax,
which is clearly the inverse of FT's goal. To say, Python's goal is to
make simple syntax that is easy to learn, learning process is
something which can't be avoided unless you've created a natural
language programming language.

As I see it, FT aimed to be a natural language programming language,
well, unless you can parse script like this;

Write down "Hello World" to the file in "C:\test.txt" then print the
output to the printer, if no printer can be found, then tell the user
"Cannot Find Printer" then write a log file that printing has failed.
Unless a = b, then make c equal to 4, or raise 5 to the power of 8 and
assign that to c when a is also equal to d. If the page has been
printed, then print a + b + c + d to the screen and wait for user
input up to 8 seconds before quitting.

Anything less than that, you've failed to create natural language
parser. The current state of FT, as I see it, is no more smarter or
intelligible or readable than Python, albeit with much more
unnecessary verbosity, which in Python, is frowned upon. Anything
between the current FT and a real natural language parser is a verbose
Perl ("there is more than one way to do it").

> > Let alone it is
> > very much a question of view-point if two different looping constructs or
> > keywords are more awkward than one general looping-concept with only one
> > keyword. It's a matter of taste.
>
> Perhaps. ?But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
>
> ? Write 10^2.
>
> but can't understand why another programming language gives the answer
> 8 (Python):
>
> ? Print 10^2
>
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Lol, that only means you haven't read the documentation of the
language. You can't write program without understanding the language,
which usually means reading the documentation, even in FT. Except in a
real natural language programming language, which you can write
anything and the compiler would (hopefully, as natural language has
many ambiguity) understand whatever you've written.

(snip)


From michele.simionato at gmail.com  Mon May 12 05:45:40 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 12 May 2008 02:45:40 -0700 (PDT)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>

On May 12, 4:28?am, Yves Dorfsman <y... at zioup.com> wrote:
>there's got to be a better way than:
>
> d = time.local()
> y = d[0]
> d = d[1]

Uses Python 2.6! ;)

Python 2.6a3 (r26a3:62861, May 12 2008, 11:41:56)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.localtime()
time.struct_time(tm_year=2008, tm_mon=5, tm_mday=12, tm_hour=11,
tm_min=43, tm_sec=47, tm_wday=0, tm_yday=133, tm_isdst=1)
>>> t=time.localtime()
>>> t.tm_year, t.tm_mday
(2008, 12)




From nick at craig-wood.com  Fri May 23 05:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:09 -0500
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
Message-ID: <slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>

bukzor <workitharder at gmail.com> wrote:
>  That does, in fact work. Thanks! I'm a little sad that there's no
>  builtin way to do it, owell.
> 
> >>> def f(a, *args):
>  ...     print a
>  ...     for b in args: print b
>  ...
> >>> import inspect
> >>> a = [2,3]
> >>> b = {'a':1}
> >>> inspect.getargspec(f)
>  (['a'], 'args', None, None)
> >>> map(b.get, inspect.getargspec(f)[0])
>  [1]
> >>> map(b.get, inspect.getargspec(f)[0]) + a
>  [1, 2, 3]
> >>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
>  1
>  2
>  3

If I saw that in my code I'd be wanting to get rid of it as soon as
possible!

I'd re-write f() to have all named arguments then the problem becomes
easy and the answer pythonic (simple dictionary manipulation)...

So instead of f(a, *args) have f(a, list_of_args).

The f(*args) syntax is tempting to use for a function which takes a
variable number of arguments, but I usually find myself re-writing it
to take a list because of exactly these sort of problems.  In fact I'd
be as bold to say that f(*args) is slightly un-pythonic and you should
avoid as a user interface.  It does have its uses when writing
polymorphic code though.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From heikki at osafoundation.org  Fri May  2 14:20:32 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 11:20:32 -0700
Subject: SSL through python. possible ?
In-Reply-To: <c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
Message-ID: <NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>

Mike Driscoll wrote:
> On Apr 29, 8:56 am, TkNeo <tarun.... at gmail.com> wrote:
>> I need to do SSL file transfer using python? Is there a library i can
>> use ?
> 
> http://sandbox.rulemaker.net/ngps/m2/

M2Crypto has since moved to http://chandlerproject.org/Projects/MeTooCrypto

-- 
  Heikki Toivonen


From wholesalesandle at gmail.com  Thu May  8 13:47:43 2008
From: wholesalesandle at gmail.com (wholesalesandle at gmail.com)
Date: Thu, 8 May 2008 10:47:43 -0700 (PDT)
Subject: wholesale Coach Handbags ,wholesale coach  bags
Message-ID: <459b6a68-f26b-4c18-a923-916e2df7bc03@s33g2000pri.googlegroups.com>

wholesale Coach Handbags ,wholesale coach  bags,http://www.ok-
export.com


From marlin_rowley at hotmail.com  Thu May 15 12:44:14 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:44:14 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C60AB.2060406@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<482C60AB.2060406@islandtraining.com>
Message-ID: <BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>

Thanks for the advice!
 
However, I assumed that:
 
fourbytes = pixelComponent[:4]
 
would shave that byte off the array in pixelComponent.  So that the array is smaller by one on the next iteration.  Is this not the case?
 
I'm getting weird results now..
 
-M



> Date: Thu, 15 May 2008 09:11:23 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > All:> >> > I've got a script that runs really slow because I'm reading from a > > stream a byte at a time:> >> > // TERRIBLE> > for y in range( height ):> > for color in range(4):> > for x in range( width ):> > pixelComponent = fileIO.read(4)> > buffer = unpack("!f",pixelComponent) << unpacks ONE > > float, but we now can do something with that pixel component.> >> >> > I can speed this up dramatically if I did this:> >> > // MUCH FASTER> > for y in range( height ):> > for color in range(4):> > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more > > data from the stream into memory FIRST!!> > for x in range( width ):> > buffer = unpack( ?????? ) <<<< how do I get each float from > > the pixelComponent???> > Just carve of the first four bytes of pixelComponent on each pass > through the loop, and unpack that.> > for x in range(width):> fourbytes = pixelComponent[:4] # first 4 bytes> pixelComponent = pixelComponent[4:] # All but first four bytes> buffer = unpack("!f", fourbytes)> > > There are probably better ways overall, but this directly answers your > question.> > Gary Herron> > > >> >> > -M> > ------------------------------------------------------------------------> > With Windows Live for mobile, your contacts travel with you. Connect > > on the go. > > <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Get Free (PRODUCT) RED?  Emoticons, Winks and Display Pics.
http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008
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From http  Tue May 20 04:15:03 2008
From: http (Paul Rubin)
Date: 20 May 2008 01:15:03 -0700
Subject: compressing short strings?
Message-ID: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>

I have a lot of short English strings I'd like to compress in order to
reduce the size of a database.  That is, I'd like a compression
function that takes a string like (for example) "George Washington"
and returns a shorter string, with luck maybe 6 bytes or so.  One
obvious idea is take the gzip function, compress some large text
corpus with it in streaming mode and throw away the output (but
setting up the internal state to model the statistics of English
text), then put in "George Washington" and treat the additional output
as the compressed string.  Obviously to get reasonable speed there
would have to be a way to save the internal state after initializing
from the corpus.

Anyone know if this has been done and if there's code around for it?
Maybe I'm better off with freezing a dynamic Markov model?  I think
there's DMM code around but am not sure where to look.

Thanks.


From zerge69 at gmail.com  Wed May 21 21:57:42 2008
From: zerge69 at gmail.com (Zerge)
Date: Wed, 21 May 2008 18:57:42 -0700 (PDT)
Subject: How do I know when all threads are done?
Message-ID: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>

I can launch threads just fine, but then I have to do a time.sleep(n)
so the main thread from which they where launched will wait for all
the threads to return.

How can I detect when all threads are done and then return control to
the main threads?

Thanks for your help


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:28:44 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:28:44 -0400
Subject: can't delete from a dictionary in a loop
In-Reply-To: <mailman.1246.1210972944.12834.python-list@python.org>
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <x%mXj.46799$3v1.5089@bignews3.bellsouth.net>

Dan Upton wrote:

> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
> 
> The problem:
> 
> RuntimeError: dictionary changed size during iteration

I don't know if the setup with the pids in a dictionary is the best way to 
manage a pool of processes... I'll leave it others, presumably more 
knowledgable, to comment on that. :-)  But I can tell you how to solve the 
immediate problem:

   for pid in procs_dict.keys():
       ...

Hope this helps!

--Hans


From VarunKumar.Rajendran at cognizant.com  Tue May 13 08:02:10 2008
From: VarunKumar.Rajendran at cognizant.com (VarunKumar.Rajendran at cognizant.com)
Date: Tue, 13 May 2008 17:32:10 +0530
Subject: Need to install Python in windows 32 bit processor
Message-ID: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>


Hi people,

 I am working with windows32 bit processor machine. 


I want to install Python in my machine.


I am not able to get the preferable installer  for installing python.

Can you tell, Which windows installer is preferable for windows32 bit
processor?




? Thanks and Regards,

VarunKumar R

Cognizant Technology Solutions |  Chennai | India

Ph:9962005560|044-43603608|V-net:453611









This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information.
If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.

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From gherron at islandtraining.com  Tue May 13 18:42:21 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 15:42:21 -0700
Subject: Why can't I import this?
In-Reply-To: <7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>	<mailman.1074.1210711800.12834.python-list@python.org>
	<7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
Message-ID: <482A194D.7070005@islandtraining.com>

John Henry wrote:
> On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> John Henry wrote:
>>     
>>> Hi list,
>>>       
>>> I can't understand this.  The following import statement works fine:
>>>       
>>>     from PythonCard.templates.dialogs import runOptionsDialog
>>>       
>>> but this one fails:
>>>       
>>>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>>>       
>> This kind of "dotted" name import only works for packages, and a
>> directory is considered a package only if it contains a file name
>> __init__.py.    Looking around my installation of PythonCard (on Linux)
>> I see that most of those directories *do NOT* have a __init__.py, so
>> they are not packages and cannot be imported that way.
>>
>> Of course this leaves unanswered the question of *how* you are supposed
>> to import that code.   I've never used PythonCard so I can't help
>> further, but I suggest looking at the documentation and examples
>> supplied.  And perhaps waiting for someone with experience with
>> PythonCard to answer.
>>
>> Gary Herron
>>
>> P.S. It is usually a waste of time to tell us that something fails
>> without telling us *how* it fails.  (Cut and paste the error message
>> always, and the traceback usually.)  If you don't, you will usually get
>> a request to supply that information, and then have wast3ed the time for
>> one full round of message to the group.  Even in this case, I'm only
>> guessing how it failed for you.
>>
>>     
>>> I've checked and rechecked to make sure that the spellings are proper
>>> and that the tools, the codeEditor directory, and codeEditor.py, and
>>> the class CodeEditor all exists and yet idle keep complaining that it
>>> can't import from PythonCard.tools.
>>>       
>>> What's going on?  (Running Python2.5 under WinXP).
>>>       
>>> Regards,
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>       
>
> Thank you very much.  I didn't know about the __init__.py
> requirement.  Appreciate it.
Actually I should have added that there ways to import such things, and 
PythonCard must be using some such method itself.  You can manipulate 
the sys.path variable, or directly call the import mechanism using the 
builtin __import__, or use a suppled "imp" module.    However, you 
should not have to do any such thing to use PythonCard.  It should do 
them in for you.


From mrkafk at gmail.com  Sat May  3 17:03:53 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 14:03:53 -0700 (PDT)
Subject: Error handling in SAX
Message-ID: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>

(this is a repost, for it's been a while since I posted this text via
Google Groups and it plain didn't appear on c.l.py - if it did appear
anyway, apols)

So I set out to learn handling three-letter-acronym files in Python,
and SAX worked nicely until I encountered badly formed XMLs, like with
bad characters in it (well Unicode supposed to handle it all but
apparently doesn't), using http://dchublist.com/hublist.xml.bz2 as
example data, with goal to extract Users and Address properties where
number of Users is greater than given number.

So I extended my First XML Example with an error handler:

# ========= snip ===========
from xml.sax import make_parser
from xml.sax.handler import ContentHandler
from xml.sax.handler import ErrorHandler

class HubHandler(ContentHandler):
    def __init__(self, hublist):
        self.Address = ''
        self.Users = ''
        hl = hublist
    def startElement(self, name, attrs):
        self.Address = attrs.get('Address',"")
        self.Users = attrs.get('Users', "")
    def endElement(self, name):
        if name == "Hub" and int(self.Users) > 2000:
            #print self.Address, self.Users
            hl.append({self.Address: int(self.Users)})

class HubErrorHandler(ErrorHandler):
    def __init__(self):
        pass
    def error(self, exception):
        import sys
        print "Error, exception: %s\n" % exception
    def fatalError(self, exception):
        print "Fatal Error, exception: %s\n" % exception

hl = []

parser = make_parser()

hHandler = HubHandler(hl)
errHandler = HubErrorHandler()

parser.setContentHandler(hHandler)
parser.setErrorHandler(errHandler)

fh = file('hublist.xml')
parser.parse(fh)

def compare(x,y):
    if x.values()[0] > y.values()[0]:
        return 1
    elif x.values()[0] < y.values()[0]:
        return -1
    return 0

hl.sort(cmp=compare, reverse=True)

for h in hl:
    print h.keys()[0], "   ", h.values()[0]
# ========= snip ===========

And then BAM, Pythonwin has hit me:


>>> execfile('ph.py')
Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)


>>> ================================ RESTART ================================

Just before the "RESTART" line, Windows has announced it killed
pythonw.exe process (I suppose it was a child process).

WTF is happening here? Wasn't fatalError method in the HubErrorHandler
supposed to handle the invalid tokens? And why is the message repeated
many times? My method is called apparently, but something in SAX goes
awry and the interpreter crashes.




From daveparker at flamingthunder.com  Tue May 13 12:36:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:36:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
Message-ID: <bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>

> ... there's something that feels very unnatural about writing English as code.

I think it is ironic that you think Flaming Thunder is unnatural
because it is more English-like, when being English-like was one of
Python's goals: "Python was designed to be a highly readable language.
It aims toward an uncluttered visual layout, using English keywords
frequently where other languages use punctuation."
http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and_semantics

> Just using your "Set ... to" idiom, rather than a
> regular = assignment, makes things much more wordy, without improving
> readability.

I think it does improve readability, especially for people who are not
very fluent mathematically.

Also, in Python how do you assign a symbolic equation to a variable?
Like this?

QuadraticEquation = a*x^2 + b*x + c = 0

Set statements avoid the confusion of multiple equal signs when
manipulating symbolic equations:

Set QuadraticEquation to a*x^2 + b*x + c = 0.

On May 13, 9:50?am, "Dan Upton" <up... at virginia.edu> wrote:
> On Tue, May 13, 2008 at 11:24 AM, Dave Parker
>
> <davepar... at flamingthunder.com> wrote:
> > > ?The "Flaming Thunder" looks promising, but without being free
> > ?> software, it's unlikely it will create a large developer community,
> > ?> specially considering both free general purpose and scientific
> > ?> programming languages.
>
> > ?Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > ?(and even less per individual for site licenses), which is less than
> > ?the cost of just one book on Python.
>
> Bah, subscription for a programming language? ?As far as I'm
> concerned, that's reason enough not to bother with it. ?Paying a
> one-time fee, or even once per upgrade, for a full-featured IDE and
> lots of support tools is painful but at least justifiable, whereas
> paying a yearly license just to even be able to try something out when
> there are so many free, sufficient options... There was an article
> on/in Wired not so long ago about the economics of free, and how
> there's a huge difference mentally between free and not-free, even if
> the practical difference is "free" and "$0.01." ?(Also, I assume
> hdante meant, at least partly, free as in speech, not free as in
> beer.)
>
> As an aside, I clearly haven't written anything in FT, but looking at
> your examples I don't know that I would want to--there's something
> that feels very unnatural about writing English as code. ?It also
> somehow seems a bit verbose, while one of the strengths of something
> like Python (since that's what you're comparing it to) is rapid
> implementation. ?Just using your "Set ... to" idiom, rather than a
> regular = assignment, makes things much more wordy, without improving
> readability. ?Some of your other structures are awkward, for instance
> "Something is a function doing" Again, more text with arguably no gain
> in readability.
>
> Just my two cents, anyway. ?I now return you to the resident madman,
> who I see has sent 4 or 5 messages while I was typing this one...



From inhahe at gmail.com  Sat May 17 15:01:10 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 15:01:10 -0400
Subject: Python-list Digest, Vol 56, Issue 311
In-Reply-To: <da776a8c0805171159t2b06c13fh20613953701d1fbe@mail.gmail.com>
References: <mailman.19205.1211035697.12833.python-list@python.org>
	<da776a8c0805171159t2b06c13fh20613953701d1fbe@mail.gmail.com>
Message-ID: <da776a8c0805171201td2633d4n12b89c182214a8c3@mail.gmail.com>

didn't mean to re-post the whole digest. i forgot to clip what was after
this message.

On Sat, May 17, 2008 at 2:59 PM, inhahe <inhahe at gmail.com> wrote:

> i just installed visual studio 8 and tried to compile again, and I got the
> same exact problem.
>
>
>
>
>>
>> From: Christian Heimes <lists at cheimes.de>
>> To: python-list at python.org
>> Date: Sat, 17 May 2008 14:59:51 +0200
>> Subject: Re: help compiling Python on vs 2008!
>> inhahe schrieb:
>> > what is going on here, and how do I compile these external libraries?
>>
>> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
>> supported. Some extensions don't compile under VS 9.0
>>
>> Christian
>>
>>
>>
>>
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From bernardet at cppm.in2p3.fr  Mon May  5 10:18:43 2008
From: bernardet at cppm.in2p3.fr (Karim Bernardet)
Date: Mon, 05 May 2008 16:18:43 +0200
Subject: get the pid of a process with pexpect
Message-ID: <fvn52g$tc6$1@ccpntc8.in2p3.fr>

Hi

I am using pexpect to do ssh tunneling and to open a vnc server (jobs on 
a grid cluster). When the job is canceled, these 2 processes remain on 
the worker node (they are detached), so I have to kill them (using a 
trap command in the bash script of the job) but I need the pid of each 
process. I have tried to get it like this

ssh_tunnel = pexpect.spawn (tunnel_command % globals())
...
print ssh_tunnel.pid

but ssh_tunnel is not the pid of the ssh tunnel

Is there a way to get it using pexpect ?

Cheers

Karim


From b0bm00r3 at gmail.com  Mon May  5 17:04:23 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Mon, 5 May 2008 14:04:23 -0700 (PDT)
Subject: Random/anonymous class methods
References: <801e1c38-ae54-443c-8d87-9745db7ef270@59g2000hsb.googlegroups.com>
Message-ID: <96370c0f-f6b0-43cb-9b9c-84a3967e6d27@m36g2000hse.googlegroups.com>

On Apr 27, 8:05 am, philly_bob <b0bm0... at gmail.com> wrote:
> In the sample program below, I want to send a random method to a class
> instance.
> In other words, I don't know which method to send until run-time.  How
> can I send ch, which is my random choice, to the myclass instance?
>
> Thanks,
>
> Bob=
>
> ####
> import random
>
> class myclass(object):
>    def meth1(self):
>       print 'meth1'
>    def meth2(self):
>       print 'meth2'
>
> c=myclass()
> meths=['meth1', 'meth2']
> ch=random.choice(meths)
> c.ch()


Thanks for your responses, everybody.  Turned out to be easiest to use
Arnaud's Getattr suggestion.  Below is a simplification of what I
ended up with; the trick appears in the algday class.

"""
I have dictionaries of OHLC tuples (open, high, low, close market
prices) for two hypothetical stocks (HUN and TEN); the dictionaries
are keyed to dates.

For each day that we have data, we want to be able to evaluate an
algorithm of the form:

   (mysum 'HUN' 'open' 'TEN', close)

in other words, to add the opening value of HUN to the closing value
of TEN.

Stock names and market values are stored in two lists: namelist and
valuelist. Namelist contains the stock symbols (HUN, TEN). Valuelist
contains dictionaries keyed to dates.  Associated in the dictionary
with
each date is a tuple containing OHLC prices. Note that even in this
sample
we have to allow for days when one stock has market values
and the other stock doesn't, as in the case of 20080424.

We use a class algday, which, given an algorithm and day, has a method
calc() which returns the result of applying that algorithm to the day.
This class (algday) uses another class, namedayval, which, given a
stock name and a
OHLC valuename, returns the value.

=Bob Moore
Thanks to Arnaud Delobelle, Aaron Brady, and Ben Finney.

"""

import random

class namedayvals(object):
   def __init__(self,name,date):
      self.name=name
      self.date=date
      self.index=namelist.index(name)
      self.valuelist=valuelist[self.index]
      self.dayswithvals=self.valuelist.keys()
   def open(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][0]
   def high(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][1]
   def low(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][2]
   def close(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][3]

class algday(object):
   def __init__(self,myop,sec1,meth1,sec2,meth2,date):
       self.myop=myop
       self.sec1=sec1
       self.meth1=meth1
       self.sec2=sec2
       self.meth2=meth2
       self.date=date
   def show(self):
       print 'algday',
self.myop,self.sec1,self.meth1,self.sec2,self.meth2,self.date
   def calc(self):
       s1=namedayvals(self.sec1, self.date)
       x1=getattr(s1,self.meth1)()
       s2=namedayvals(self.sec2, self.date)
       x2=getattr(s2,self.meth2)()
       if self.myop=='mysum':
          out=mysum(x1,x2)
       elif self.myop=='myless':
          out=myless(x1,x2)
       elif self.myop=='mydiv':
          out=mydiv(x1,x2)
       elif self.myop=='mytimes':
          out=mytimes(x1,x2)
       else:
          out='NA'
       return out

def mydiv(num1, num2):
   if num1=='NA' or num2=='NA':
       temp='NA'
   else:
       if num2==0:
           temp=0.0
       else:
           temp=float(num1)/float(num2)
   return temp

def myless(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1-num2
   return temp

def mytimes(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1*num2
   return temp

def mysum(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1*num2
   return temp

#####

namelist=[]
valuelist=[]
namelist.append('HUN')
valuelist.append(dict({'20080422': (100.1,100.2,100.3,100.4),
                       '20080423': (101.1,101.2,101.3,101.4),
                       '20080424': (102.1,102.2,102.3,102.4)}))
namelist.append('TEN')
valuelist.append(dict({'20080422': (10.1,10.2,10.3,10.4),
                       '20080423': (11.1,11.2,11.3,11.4)}))

operatorlist=['mydiv','mysum','myless','mytimes']
valuenames=['open','high','low','close']
daylist=['20080422','20080423','20080424']

while 1:
   rop=random.choice(operatorlist)
   rn1=random.choice(namelist)
   rv1=random.choice(valuenames)
   rn2=random.choice(namelist)
   rv2=random.choice(valuenames)
   print rop,rn1,rv1,rn2,rv2
   calcs=[]
   for date in daylist:
       a=algday(rop,rn1,rv1,rn2,rv2,date)
       calcs.append([date,a.calc()])
   print 'daily calcs=', calcs
   print 'Control-C to stop'







From bignose+hates-spam at benfinney.id.au  Sun May  4 23:26:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 05 May 2008 13:26:43 +1000
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <874p9dfn2k.fsf@benfinney.id.au>

notbob <notbob at nothome.com> writes:

> Am I likely to receive any help, here, or is there another irc,
> forum, etc, that might better serve a complete amateur such as
> myself. Thnx.

This forum is particularly welcoming to newbies, I've found. Go ahead
and start a new thread for any Python question.

One caveat: When you do compose a message asking a question, please
make the Subject field of your message meaningful by itself and don't
put anything like "Newbie question" in there. If it's a newbie
question, we'll figure that out for ourselves, and it shouldn't affect
whether or not it gets answered.

(You haven't done anything like that, but I'm noting it in advance and
because I hope *other* newbies will also see this and take note.)

-- 
 \        "I'd take the awe of understanding over the awe of ignorance |
  `\                                       any day."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From bignose+hates-spam at benfinney.id.au  Sun May 11 09:02:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 11 May 2008 23:02:53 +1000
Subject: How to uninstall something installed by "setup.py install"?
References: <4826cc2f$0$655$bed64819@news.gradwell.net>
Message-ID: <87r6c9803m.fsf@benfinney.id.au>

tinnews at isbd.co.uk writes:

> I have installed a development version of rdiff-backup using its
> "setup.py install" but now find I need to uninstall it. Is there any
> 'easy' way to do this and/or can I find out what files it has
> installed where so I can remove them?

Sadly, the re-invention of package management as seen in
'easy_install' does not implement an "uninstall" command.

This is one reason why many of us avoid it and use system-wide package
management instead. Unfortunately, not all operating systems are
mature enough to have decent package management.

-- 
 \      "Yesterday I saw a subliminal advertising executive for just a |
  `\                                        second."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From dickinsm at gmail.com  Mon May 12 10:21:51 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Mon, 12 May 2008 07:21:51 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
Message-ID: <03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>

On May 12, 2:09?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well
> defined whether y is 0 or not, even though there is a discontinuity in the
> limit.

Well, there's a difference:  the limit of exp(y*log(x)) as (x, y) ->
(0, a) exists for all finite nonzero a.  The limit as (x, y) ->
(0, 0) doesn't.

> 2.5 raises an exception. ?In 3.0,>>> (-2)**1.99999999
>
> (3.9999999722741113-1.2566370355167477e-07j)

Interesting---I hadn't realised that 3.0 had changed this.
I can't quite decide whether I like this behaviour much.  It
seems to be the only case where a computation involving only
floats can produce a complex number.

>
> | Incidentally, the decimal module is slightly schizophrenic about this:
>
> That module follows the IBM-led standard, no matter how crazy.

Yeah---I know. :-).  The current decimal __pow__ code is mostly
my fault, at least in 2.5.2/2.6/3.0 onwards.  For what it's
worth, the author of the Decimal standard has indicated that
the behaviour of 0**0 might change after IEEE 754r finally
sees the light of day.

Mark


From larry.bates at websafe.com`  Tue May 13 09:25:40 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 08:25:40 -0500
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <isydnU3sOO_3C7TVnZ2dnUVZ_obinZ2d@comcast.com>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

I use it quite often, especially if I want to implement a fixed number of 
retries on a communications channel.

-Larry


From google at zvis.com  Wed May  7 01:39:48 2008
From: google at zvis.com (Zvi)
Date: Tue, 6 May 2008 22:39:48 -0700 (PDT)
Subject: Problem parsing SOAP envelope with ElementTree
Message-ID: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>

Hi All,

   Can someone tell me why id the following not working?
I have a soap response envelope, for test purpose it's just a string
and I create ElementTree from it.
Then I try to find Response tag, but I get None.


       data = """<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/
soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
                  <soap:Body> <Get2Response xmlns="http://
tempuri.org/">
                     <Get2Result><![CDATA[<?xml version='1.0'
encoding='UTF-8'?> <Response> <Entity Name='Accounts'
Current='00300571B42F1DEC8E9B6CDF19A59950'> <Instance
                     Id='00300571B42F1DEC8E9B6CDF19A59950'> <Field
Name='Status' Value='2'/> <Field Name='Id' Value='MC4670'/> <Field
Name='Name' Value='ACDC Industries Inc'/>
                     <Field Name='City' Value='Milwaukee'/> <Field
Name='MainContact' Value=''/> <Field Name='CreatedOn'
Value='20070723051316.0000000 '/> </Instance> </Entity>  </
Response>]]></Get2Result>
                  </Get2Response></soap:Body></soap:Envelope>"""

       ElementTree.XMLTreeBuilder = SimpleXMLTreeBuilder.TreeBuilder
       dom=ElementTree.fromstring(data)

       if dom == None:
         return "Empty Dom"

       response = dom.find('{http://schemas.xmlsoap.org/soap/
envelope/}Response')
       if response == None:
         return "Empty Response"

       if I try to use
response = dom.find('{http://tempuri.org/}Response') this doesn't work
either.

What am I doing wrong?


From marlin_rowley at hotmail.com  Fri May 16 19:23:54 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:23:54 -0500
Subject: arrays
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M
_________________________________________________________________
Give to a good cause with every e-mail. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?souce=EML_WL_ GoodCause
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From thorsten at thorstenkampe.de  Sun May  4 13:16:54 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sun, 4 May 2008 19:16:54 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
Message-ID: <MPG.22880dee9cc808bf98975c@news.individual.de>

* ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> Hi, what's the default localedir for gettext module on windows? In
> Linux, it's /usr/share/locale. Where should I put the *.mo file in
> order to make the translation work?

%PYTHONHOME%\share\locale

Thorsten


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 10:11:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 16:11:36 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
Message-ID: <482d9618$0$2656$426a74cc@news.free.fr>

globalrev a ?crit :
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
(snip)
>>>     def getMovies():
>>>         return self.movies
>> 4/ Python has support for computed attributes, so you just don't need
>> these getters.

 > when class =
 > class customer:

Please, do yourself and the world a favour, follow naming conventions 
(not only will this make your code more readable, but also quite a lot 
of things in Python rely on conventions).

And really, use newstyle classes unless you have a *very* compelling 
reason not to.

class Customer(object):

 >     def __init__(self, idnbr, movies):
 >         self.idnbr = idnbr
 >         self.movies = movies
 >

> print "cust", cust1.idnbr, cust1.movies()

Why do you want to call a list ???

> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable

Indeed. cust1.movie being a list, that's just what you would expect. 
Hint : what do you think will happen with the following code:

   alist = [1, 2, 3]
   alist()

When I say that Python has support for computed attributes, it doesn't 
mean it will automagically add getters/setters for your attributes, but 
that by default you just *don't need* getters/setters - you'll be able 
to transparently add them latter if there's an effective need for them - 
where "transparently" means "without client code knowing it's in fact 
calling a getter or setter".

Example:

# before:
class Foo(object):
    def __init__(self, name):
       # just a plain attribute assignment
       self.name = name

f = Foo('bruno')
# just a plain attribute access
print f.name

# after
class Foo(object):
    def __init__(self, name):
       # still looks like a plain attribute assignment
       self.name = name

    # defining the setter and getter
    def _setname(self, name):
      print "setting %s name to '%s'" % (self, name)
      self._name = name
    def _getname(self):
      print "retrieving %s name ('%s')" % (self, self._name)
      return self._name.upper()

    # and making this a computed attribute using the getter and
    # setter under the hood
    name = property(fget=_getname, fset=_setname)

f = Foo('bruno')
# still looks like a plain attribute access
print f.name

Also, given your recent posts here, I strongly suggest you take some 
time doing at least the official tutorial.

HTH


From wizzardx at gmail.com  Sun May  4 09:32:22 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 15:32:22 +0200
Subject: ISBN Barecode reader in Python?
In-Reply-To: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040632n1646defbq776c78065b771b21@mail.gmail.com>

On Sun, May 4, 2008 at 1:41 PM, Joseph <cephire at gmail.com> wrote:
> All: I have written a program to query Amazon with ISBN and get the
>  book details. I would like to extend so that I can read ISBN from the
>  barcode (I will take a photo of the same using webcam or mobile). Are
>  there any opensource/free SDK doing the same? As it is a hobby
>  project, I don't like to spend money on the SDK.
>

I Googled a bit and found this:

http://jocr.sourceforge.net/index.html

According to the docs it should be able to scan bar codes.

David.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 11:12:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 17:12:29 +0200
Subject: Function creation (what happened?)
In-Reply-To: <f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <482469dc$0$4280$426a74cc@news.free.fr>

Viktor a ?crit :
> This completely slipped of my mind... :)
> 
> I'm trying to change the:
> http://wordaligned.org/svn/etc/echo/echo.py
> 
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
> 
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction 

s/TypeFunction/function/

> (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function

The latter, unless you decorate it with a classmethod or staticmethod 
object before.

> - tried
> with inspect also)... And what is most interesting, when I do:
> 
> def w(fn):
>     print 'fn:', id(fn)
>     return fn
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> 
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...

Yes it is. But A.__init__ is *not* a function, it's a method. To get at 
the function, you must use A.__dict__['__init__'] or A.__init__.im_func

> Is there a way to find out in the decorator "what will the decorated
> function be"?

Yes : the decorated function is the function you decorate with the 
decorator.

Ok, this requires some explanations (nb: only valid for new-style classes):

- First point : what you declare in the class statement are plain 
ordinary function. When the class statement is executed - that is, 
usually[1], at import time - these function objects become attributes of 
the class object.
[1] IOW : if your class statement is at the top-level of your module

- Second point: the function class implements the descriptor 
protocol[2], so when an attribute lookup resolves to a function object, 
the function's class __get__ method is invoked
[2] http://users.rcn.com/python/download/Descriptor.htm

- Third point: the function's __get__ method returns a method object, 
either bound (if lookup was done on an instance) or unbound (if the 
lookup was done on a class).

The function's class __get__ method could be implemented this way:

    def __get__(self, instance, cls):
        return types.MethodType(self, instance, cls)


- Fourth point: a method object is a thin callable wrapper around the 
function, the instance (if provided), and the class. It could look like 
this:

class Method(object):
   def __init__(self, func, instance, cls):
     self.im_func = func
     self.im_self = instance
     self.im_class = cls

   def __repr__(self):
     if self.im_self is None:
       # unbound
       return "<unbound method %s.%s>" \
               % (self.im_class.__name__, self.im_func.__name__)
     else:
       # bound
       return "<bound method %s.%s of %s>" \
                % (self.im_class.__name__,
                   self.im_func.__name__,
                   self.im_self)

   def __call__(self, *args, **kw):
     if self.im_self is None:
       try:
         instance, args = args[0], args[1:]
       except IndexError:
         raise TypeError(
           "unbound method %s() must be called with %s instance "
           " as first argument (got nothing instead)" \
           % (self.im_func.__name__, self.im_class.__name__)
       if not isinstance(instance, self.im_class):
         raise TypeError(
           "unbound method %s() must be called with %s instance "
           " as first argument (got %s instead)" \
           % (self.im_func.__name__, self.im_class.__name__, instance)

     else:
       instance = self.im_self
     return self.im_func(instance, *args, **kw)

The classmethod and staticmethod classes (yes, they are classes...) have 
their own implementation for the descriptor protocol - 
classmethod.__get__ returns a Method instanciated with func, cls, 
type(cls), and staticmethod.__get__ returns the original function.


So as you can see - and classmethods and staticmethods set aside -, what 
you decorate is *always* a function. And you just can't tell from within 
the decorator if this function is called "directly" or from a method 
object. The only robust solution is to decorate the function with your 
own custom callable descriptor. Here's a Q&D untested example that 
should get you started (warning : you'll have to check for classmethods 
and staticmethods)

class wmethod(object):
     def __init__(self, method):
        self.method = method

     def __call__(self, *args, **kw):
        # called as a method
        # your tracing code here
        # NB : you can access the method's
        # func, class and instance thru
        # self.method.im_*,
        return self.method(*args, **kw)

class w(object):
     def __init__(self, func):
       self.func = func

     def __get__(self, instance, cls):
       return wmethod(self.func.__get__(instance, cls))

     def __call__(self, *args, **kw):
       # called as a plain function
       # your tracing code here
       return self.func(*args, **kw)


HTH


From hat at se-162.se.wtb.tue.nl  Mon May 19 04:01:40 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 19 May 2008 10:01:40 +0200
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <slrng32cv4.egt.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Kay Schluehr <kay.schluehr at gmx.net> wrote:
> On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> Hello all,
>>
>> Yesterday we found the cause of a bug that has caused problems for a long time.
>> It appeared to be the following:
>>
>> class A(object):
>>     pass
>>
>> print min(1.0, A())
>>
>> which is accepted by Python even though the A() object is not numerical in
>> nature.
>>
>> The cause of this behavior seems to be the compare operation of the object
>> class.
>>
>> Is there a way to disable this behavior in Python (other than deriving a new
>> 'object-like' class that doesn't do comparisons?)
>>
>> Sincerely,
>> Albert
>
> Are you sure you don't want to use a statically typed language that
> captures all type errors just by inspecting your source code?

yes.

The problem here is that it isn't caught at all, neither at 'compile' time nor
at run-time. That means that the Python language considers this proper code.

Whether you make that decision by inspecting source code or at run-time is
irrelevant here.


Unfortunaly, we have to maintain Python 2.3 compability.
As a solution, I have created a new BaseObject class as follows:

class BaseObject(object):
    """
    Generic base class without default compare and hashing functions.
    """
    def __cmp__(self, other):
        """ Disable default compare method """
        raise NotImplementedError

    def __hash__(self):
        """ Disable default hashing method """
        raise NotImplementedError("Implement me in class '%s'"
                                                    % self.__class__.__name__)


Sincerely,
Albert


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:25:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:25:02 -0300
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
	<0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
Message-ID: <op.ua3bb0t9x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 08:13:01 -0300, alex23 <wuwei23 at gmail.com> escribi?:
> On May 13, 8:18 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:

>> May I ask *where* did you read that crazy idea?
>
> Grant Edwards outlines his past behaviour here:
> http://groups.google.com/group/comp.lang.python/msg/27553bd56827dc0f
>
> Given that all nine of his postings have inflammatory topics, he's
> beginning to sound like a troll.

Ah! Thanks. I didn't recognize him.

-- 
Gabriel Genellina



From hat at se-162.se.wtb.tue.nl  Wed May 21 11:05:03 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 21 May 2008 17:05:03 +0200
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
Message-ID: <slrng38egv.2j3.hat@se-162.se.wtb.tue.nl>

On 2008-05-21, zhf <mypromise at sina.com> wrote:
> I want ro walk a directory and its sub directory on linux,
> to find some shell script file, and run them, but I found some path belong
> blank charactor, such as '8000 dir', if I write as follow, I got error
> "no such file"
> path = '8000 dir'
> for root, dirs, files in os.walk(path):
> cmd = ' '
> cmd = 'cd ' + root
> os.system(cmd)
>
> How can I repair it?

Escape the space to prevent the shell from interpreting it as a word seperator.
This of course also holds for all other shell meta characters,
such as * [ ] \ > < & and a few others I probably have forgotten.


I am not sure why you execute 'cd' commands in a sub-shell, as it is not very
useful. (that is, you start a new sub-process, in that sub-process you run the
'cd' command (causing the cwd of the sub-process to change directory), and then
the sub-process ends)

You most likely want to change the cwd of the Python process. If so, have a
look at os.chdir(). That function has the added advantage that there is no
shell in between that interprets all those meta characters (that is,
"os.chdir('8000 dir')" will work without further effort).

Sincerely,
Albert


From mattheww at chiark.greenend.org.uk  Sun May 25 17:52:25 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 22:52:25 +0100 (BST)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
	<mailman.1580.1211748858.12834.python-list@python.org>
Message-ID: <DL*MFNds@news.chiark.greenend.org.uk>

David  <wizzardx at gmail.com> wrote:
> Might be a difference in project size/complexity then, rather than
> company size. Most of my works projects are fairly small (a few
> thousand lines each), very modular, and each is usually written and
> maintained by one developer. A lot of the programs will be installed
> together on a single server, but their boundaries are very clearly
> defined.

> Personally I've had to do very little bug fixing and maintenance.
> Thorough testing of all my changes before they go into production
> means that I've caught 99% of the problems, and there is very little
> to fix later.

> That's why I'm surprised to hear that such a huge amount of time is
> spent on testing maintenance, and why the other posters make such a
> big deal about unit tests.

> I'm not a genius programmer, so it must be that I'm lucky to work on
> smaller projects most of the time.

This is close to my experience. One lesson we might draw is that
there's an advantage to structuring your work as multiple small
projects whenever possible, even if making one big project seems more
natural.

I should think everyone would be happy with a bug-coping strategy of
"don't write the bugs in the first place", if at all possible. My guess
is that the main part of the 'small project' advantage is that all
changes can be written or reviewed by someone who is decently familiar
with the whole program.

That does suggest that if programmers do find that they're spending
more than half of their time fighting bugs, it might be worthwhile to
invest time in having more people become very familiar with the
existing code.

-M-


From mcknight0219 at gmail.com  Sun May 11 09:23:02 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 11 May 2008 06:23:02 -0700 (PDT)
Subject: Problem with custom events in wxpython
Message-ID: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>

hi, all

I'm having a problem with creating custom events in wxpython.

I have a class A handling some data processing work and another class
B of GUI matter. I need GUI to display information when data in A is
updated.
I know cutom events in wxpython may work. But I found no material
paricularly
helpful :(

can anyone write me some demo code to show how to do this or ant
reference to
materials? thanks


From arnodel at googlemail.com  Sun May 25 13:21:47 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 25 May 2008 18:21:47 +0100
Subject: raising an exception when multiple inheritance involves same
	baseThank
References: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <m2wsli5mfo.fsf@googlemail.com>


Sorry I lost the original post.

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 25, 8:37?am, Michael Hines <michael.hi... at yale.edu> wrote:
>> Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
>> not multiple inheritance per se I prohibit but only multiple inheritance
>> involving more than one HocObject class, I replaced your len(bases) > 1
>> test with
>> <code>
>> ? ? m = False
>> ? ? for b in bases :
>> ? ? ? if hasattr(b, '__mro__'):
>> ? ? ? ? for bb in b.__mro__ :
>> ? ? ? ? ? if bb == MetaHocObject.ho :
>> ? ? ? ? ? ? if m == True:
>> ? ? ? ? ? ? ? raise Exception("Inheritance of multiple HocObject not
>> allowed")
>> ? ? ? ? ? ? m = True
>>
>> </code>

I think you don't need to look at the bases' mros, just use
issubclass(), e.g. (untested):

    if sum(1 for b in bases if issubclass(b, HocObject)) > 1:
        raise Exception("Multiple inheritance from HocObject")

>> to get
>>
>> class A(HocObject): pass
>>
>> class B(object): pass
>>
>> class C(): pass
>>
>> class D(C, B, HocObject): pass # ok
>>
>> class D(C, A, HocObject): pass # fail
>>
>> When I fold this idea into my code I may even try to eliminate the class
>> factory aspect of
>> class Foo(hclass(h.Vector))
>> in favor of
>> class Foo(h.Vector)
>>
>> Thanks again,
>> Michael
>
> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
>
> -- Paul
>
>
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

All new-style classes descend from object, so any new-style class
with at least two bases makes a diamond!  For example the first
version of class D above inherits twice from object, so it will be
caught.

OTOH, old-style classes don't have an __mro__, so this will not catch
diamond inheritance of old-style classes.  E.g

class A: pass
class B(A): pass
class C(A): pass
class D(B, C): pass

-- 
Arnaud


From bruno.desthuilliers at gmail.com  Mon May 19 16:58:48 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:58:48 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
Message-ID: <4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>

On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
(snip)
> The main
> concept here: identity [usually] implies equality,

I really enjoyed the "usually" disclaimer !-)


From nick at craig-wood.com  Sun May  4 16:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sun, 04 May 2008 15:30:03 -0500
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
Message-ID: <slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>

Joseph <cephire at gmail.com> wrote:
>  All: I have written a program to query Amazon with ISBN and get the
>  book details. I would like to extend so that I can read ISBN from the
>  barcode (I will take a photo of the same using webcam or mobile). Are
>  there any opensource/free SDK doing the same? As it is a hobby
>  project, I don't like to spend money on the SDK.

Pick yourself up a cue-cat barcode reader, eg from here or ebay

  http://www.librarything.com/cuecat

These appear as a keyboard and "type" the barcode in to your program.

Cheap and effective.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From greg.ewing at canterbury.ac.nz  Wed May  7 21:40:32 2008
From: greg.ewing at canterbury.ac.nz (Greg Ewing)
Date: Thu, 08 May 2008 13:40:32 +1200
Subject: ANN: Assembly Line 0.5
Message-ID: <mailman.777.1210256653.12834.python-announce-list@python.org>

I've uploaded a new version of my PyWeek 6 game, Assembly Line.

   http://media.pyweek.org/dl/6/gregpw6/AssemblyLine-0.5.zip

As a potential Pyggy entry, I'm keen to get some testing and feedback on it.

This version is greatly expanded. Some of the new features include:

     * More machine types and enhanced machine functionality
     * Simulation of a market that's buying your products
     * Multiple factories
     * Extensive reports showing what's going on with sales and finances
     * Sales and profit targets to aim for, and salary raises to seek after

Note that not all the products and machines are available at once now. The new 
machines will become available as the game progresses (about one every two 
months of game time) and you need to spend money to research new products.

I still haven't done much playtesting or balancing -- I've verified that the 
Phunky Phrisbee, Mojo Mallet and Supa Slice can be manufactured and sold at a 
profit, but I don't know about the others yet.

-- 
Greg


From gabe at dragffy.com  Thu May 15 06:08:11 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:08:11 +0000 (UTC)
Subject: List behaviour
Message-ID: <loom.20080515T100725-874@post.gmane.org>

Hi all

Just wondering if someone could clarify this behaviour for me, please?

>>> tasks = [[]]*6
>>> tasks
[[], [], [], [], [], []]
>>> tasks[0].append(1)
>>> tasks
[[1], [1], [1], [1], [1], [1]]

Well what I was expecting to end up with was something like:
?>>> tasks
[[1], [], [], [], [], []]


I got this example from page 38 of Beginning Python.

Regards

Gabriel





From msc at es.aau.dk  Wed May  7 06:48:44 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 12:48:44 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<mailman.696.1210151866.12834.python-list@python.org>
Message-ID: <wdwd4nyv183.fsf@msc-dt.kom.auc.dk>

>>>>> "Ian" == Ian Kelly <ian.g.kelly at gmail.com> writes:
Ian> Isn't lazy evaluation sort of the whole point of replacing a list
Ian> with an iterator? Besides which, running up to the first yield when
Ian> instantiated would make the generator's first iteration
Ian> inconsistent with the remaining iterations.

That wasn't my idea, although that may not have come across quite
clearly enough. I wanted the generator to immediately run until right
before the first yield so that the first call to next() would start with
the first yield.

My objection is that generators _by default_ have different semantics
than the rest of the language. Lazy evaluation as a concept is great for
all the benefits it can provide, but, as I've illustrated, strictly lazy
evaluation semantics can be somewhat surprising at times and lead to
problems that are hard to debug if you don't constantly bear the
difference in mind. In this respect, it seems to me that my suggestion
would be an improvement. I'm not any kind of expert on languages,
though, and I may very well be missing a part of the bigger picture that
makes it obvous why things should be as they are.

As for code to slightly change the semantics of generators, that doesn't
really address the issue as I see it: if you're going to apply such code
to your generators, you're probably doing it exactly because you're
aware of the difference in semantics, and you're not going to be
surprised by it. You may still want to change the semantics, but for
reasons that are irrelevant to my point.

Martin


From irmen.NOSPAM at xs4all.nl  Sun May 11 05:40:45 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 11 May 2008 11:40:45 +0200
Subject: what does int means for python ?
In-Reply-To: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>
Message-ID: <4826bf47$0$14345$e4fe514c@news.xs4all.nl>

alefajnie wrote:
> #!/usr/bin/env python
> 
> arr = [[0 for c in range(0, 10)] for r in range(0, 10)]             #
> 10x10 array
> 
> arr[2,3]                 # throws TypeError: list indices must be
> integers
> arr[int(2), int(3)]     # also throws TypeError: list indices must be
> integers !
> 
> -------------------------------------------------
> what is wrong in above script ?
> 
> 

try arr[2][3] instead.

basically your version is trying to index an array with a tuple argument (2,3).

--irmen


From Scott.Daniels at Acm.Org  Sun May 25 18:31:29 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 15:31:29 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <mailman.1573.1211736978.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>	<mailman.1555.1211681333.12834.python-list@python.org>	<5hv*dSKds@news.chiark.greenend.org.uk>
	<mailman.1573.1211736978.12834.python-list@python.org>
Message-ID: <WPKdnQM0ws80e6TVnZ2dnUVZ_v7inZ2d@pdx.net>

David wrote:

> It was an interesting exercise, and I'm encouraged to try it further.
Yes, The developed code is missing an overview, but this is an example 
implementing something we all understand a "stack".  The layout is a
little short on vertical whitespace, but I'm presuming you do that for
e-mail / newsgroup purposes.

> Would you normally start with a basic TestStackBehavoiur class, and
> when Stack becomes more complicated, split the tests up into
> TestEmptyStackContext, TestStackWithOneElementContext, etc?
I split about the time my setUp or tearDown needs to get tricky in order
to handle my different cases.  I also often add new classes for new 
projects.

> Another thing I noticed is that some of my test cases were redundant.
> Would you normally leave in the redundant tests, or remove the ones
> which are included in the more general test?
I get a bit lazy about refactoring tests.

> Also, I have another question. How do you unit test event loops?
I seldom do event loop _unit_ tests.  Most of the code is not in the
event environment, so most of the code I unit test is broken out.
If you have to be a bit more in bed with the event system, consider
a mock event system that connects to your code and provides specific
event chains and "expects" certain responses.

--Scott David Daniels
Scott.Daniels at Acm.Org


From skanemupp at yahoo.se  Fri May 16 07:36:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 04:36:08 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
Message-ID: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>

wassup here?


>>>
7

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
<module>
    print cust1.getID()
AttributeError: 'NoneType' object has no attribute 'getID'
>>>



class customer:
    def __init__(self, ID, movies):
        self.ID = ID
        self.movies = movies

    def getID():
        return self.ID

    def getMovies():
        return self.movies


import os
import customer
import movie

mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
mv1str = mv1.read()

print mv1str.count(',5,')

cust1 = customer.__init__('12',['1','435','2332'])
print cust1.getID()


From grflanagan at gmail.com  Thu May 22 15:14:01 2008
From: grflanagan at gmail.com (Gerard flanagan)
Date: Thu, 22 May 2008 21:14:01 +0200
Subject: Producing multiple items in a list comprehension
In-Reply-To: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <4835C5F9.5040600@gmail.com>

Joel Koltner wrote:
> Is there an easy way to get a list comprehension to produce a flat list of, 
> say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn this 
> back into what I want, but I was hoping there's some way to avoid the "lists 
> of lists" generation in the first place?
> 
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
> do so?
> 
> Thanks,
> ---Joel
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

For the first part:

def gen(n):
     for i in xrange(n):
         yield i
         yield 2*i

print list(gen(4))

[0, 0, 1, 2, 2, 4, 3, 6]

gerard


From kamhung.soh at gmail.com  Sat May 10 22:09:38 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 12:09:38 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<op.uawq8posev04yd@hungvista> <m2iqxm4m86.fsf@googlemail.com>
Message-ID: <op.uaywacb3ev04yd@hungvista>

On Sat, 10 May 2008 18:06:17 +1000, Arnaud Delobelle  
<arnodel at googlemail.com> wrote:

> "Kam-Hung Soh" <kamhung.soh at gmail.com> writes:
>
>> On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:
>>
>>>> > What would be the best method to print the top results, the one's  
>>>> that
>>>> > had the highest amount of anagrams??  Create a new histogram dict?
>>>>
>>>> You can use the max() function to find the biggest list of anagrams:
>>>>
>>>> top_results = max(anagrams.itervalues(), key=len)
>>>>
>>>> --
>>>> Arnaud
>>>
>>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>>> lists?  Is there a way to specific top three w/ a max command??
>>>
>>
>> Built-in max() function only returns one result.
>>
>> My solution is to make a sorted list and return last three items:
>>
>> sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]
>
> Using the key= parameter of sorted() beats explicit DSU:
>
> sorted(anagrams.itervalues(), key=len)[-3:]
>
> Or even
>
> sorted(anagrams.itervalues(), key=len, reverse=True)[:3]
>

Nice!

I just found out that DSU = Decorate-Sort-Undecorate idiom, from  
http://wiki.python.org/moin/HowTo/Sorting.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From saluk64007 at gmail.com  Sun May 11 00:06:13 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 10 May 2008 21:06:13 -0700
Subject: Free Memory
In-Reply-To: <op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
	<op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <c3f69bf60805102106n524cc6b9qc6c1f5fba0c8ee63@mail.gmail.com>

Yeah I don't know much about locals or globals.  I've never used them
before, just know they are there.  But anyway, to illustrate what I meant by
the interesting behavior, here is the output (and sorry for it being so
long):

IDLE 2.6a2
>>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__',
'__doc__': None, '__package__': None}
>>> globals().clear()
>>> globals()
{'__builtins__': {'bytearray': <type 'bytearray'>, 'IndexError': <type
'exceptions.IndexError'>, 'all': <built-in function all>, 'help': Type
help() for interactive help, or help(object) for help about object., 'vars':
<built-in function vars>, 'SyntaxError': <type 'exceptions.SyntaxError'>,
'unicode': <type 'unicode'>, 'UnicodeDecodeError': <type
'exceptions.UnicodeDecodeError'>, 'isinstance': <built-in function
isinstance>, 'copyright': Copyright (c) 2001-2008 Python Software
Foundation.
All Rights Reserved.

Copyright (c) 2000 BeOpen.com.
All Rights Reserved.

Copyright (c) 1995-2001 Corporation for National Research Initiatives.
All Rights Reserved.

Copyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam.
All Rights Reserved., 'NameError': <type 'exceptions.NameError'>,
'BytesWarning': <type 'exceptions.BytesWarning'>, 'dict': <type 'dict'>,
'input': <built-in function input>, 'oct': <built-in function oct>, 'bin':
<built-in function bin>, 'SystemExit': <type 'exceptions.SystemExit'>,
'StandardError': <type 'exceptions.StandardError'>, 'format': <built-in
function format>, 'repr': <built-in function repr>, 'sorted': <built-in
function sorted>, 'False': False, 'RuntimeWarning': <type
'exceptions.RuntimeWarning'>, 'list': <type 'list'>, 'iter': <built-in
function iter>, 'reload': <built-in function reload>, 'Warning': <type
'exceptions.Warning'>, '__package__': None, 'round': <built-in function
round>, 'dir': <built-in function dir>, 'cmp': <built-in function cmp>,
'set': <type 'set'>, 'bytes': <type 'str'>, 'reduce': <built-in function
reduce>, 'intern': <built-in function intern>, 'issubclass': <built-in
function issubclass>, 'Ellipsis': Ellipsis, 'EOFError': <type
'exceptions.EOFError'>, 'locals': <built-in function locals>, 'slice': <type
'slice'>, 'FloatingPointError': <type 'exceptions.FloatingPointError'>,
'sum': <built-in function sum>, 'getattr': <built-in function getattr>,
'abs': <built-in function abs>, 'exit': Use exit() or Ctrl-Z plus Return to
exit, 'print': <built-in function print>, 'True': True, 'FutureWarning':
<type 'exceptions.FutureWarning'>, 'ImportWarning': <type
'exceptions.ImportWarning'>, 'None': None, 'hash': <built-in function hash>,
'len': <built-in function len>, 'credits':     Thanks to CWI, CNRI,
BeOpen.com, Zope Corporation and a cast of thousands
    for supporting Python development.  See www.python.org for more
information., 'frozenset': <type 'frozenset'>, '__name__': '__builtin__',
'ord': <built-in function ord>, 'super': <type 'super'>, '_': None,
'TypeError': <type 'exceptions.TypeError'>, 'license': Type license() to see
the full license text, 'KeyboardInterrupt': <type
'exceptions.KeyboardInterrupt'>, 'UserWarning': <type
'exceptions.UserWarning'>, 'filter': <built-in function filter>, 'range':
<built-in function range>, 'staticmethod': <type 'staticmethod'>,
'SystemError': <type 'exceptions.SystemError'>, 'BaseException': <type
'exceptions.BaseException'>, 'pow': <built-in function pow>, 'RuntimeError':
<type 'exceptions.RuntimeError'>, 'float': <type 'float'>, 'MemoryError':
<type 'exceptions.MemoryError'>, 'StopIteration': <type
'exceptions.StopIteration'>, 'globals': <built-in function globals>,
'divmod': <built-in function divmod>, 'enumerate': <type 'enumerate'>,
'apply': <built-in function apply>, 'LookupError': <type
'exceptions.LookupError'>, 'open': <built-in function open>, 'quit': Use
quit() or Ctrl-Z plus Return to exit, 'basestring': <type 'basestring'>,
'UnicodeError': <type 'exceptions.UnicodeError'>, 'zip': <built-in function
zip>, 'hex': <built-in function hex>, 'long': <type 'long'>,
'ReferenceError': <type 'exceptions.ReferenceError'>, 'ImportError': <type
'exceptions.ImportError'>, 'chr': <built-in function chr>, 'xrange': <type
'xrange'>, 'type': <type 'type'>, '__doc__': "Built-in functions,
exceptions, and other objects.\n\nNoteworthy: None is the `nil' object;
Ellipsis represents `...' in slices.", 'Exception': <type
'exceptions.Exception'>, 'tuple': <type 'tuple'>, 'UnicodeTranslateError':
<type 'exceptions.UnicodeTranslateError'>, 'reversed': <type 'reversed'>,
'UnicodeEncodeError': <type 'exceptions.UnicodeEncodeError'>, 'IOError':
<type 'exceptions.IOError'>, 'hasattr': <built-in function hasattr>,
'delattr': <built-in function delattr>, 'setattr': <built-in function
setattr>, 'raw_input': <built-in function raw_input>, 'SyntaxWarning': <type
'exceptions.SyntaxWarning'>, 'compile': <built-in function compile>,
'ArithmeticError': <type 'exceptions.ArithmeticError'>, 'str': <type 'str'>,
'property': <type 'property'>, 'GeneratorExit': <type
'exceptions.GeneratorExit'>, 'int': <type 'int'>, '__import__': <built-in
function __import__>, 'KeyError': <type 'exceptions.KeyError'>, 'coerce':
<built-in function coerce>, 'PendingDeprecationWarning': <type
'exceptions.PendingDeprecationWarning'>, 'file': <type 'file'>,
'EnvironmentError': <type 'exceptions.EnvironmentError'>, 'unichr':
<built-in function unichr>, 'id': <built-in function id>, 'OSError': <type
'exceptions.OSError'>, 'DeprecationWarning': <type
'exceptions.DeprecationWarning'>, 'min': <built-in function min>,
'UnicodeWarning': <type 'exceptions.UnicodeWarning'>, 'execfile': <built-in
function execfile>, 'any': <built-in function any>, 'complex': <type
'complex'>, 'bool': <type 'bool'>, 'ValueError': <type
'exceptions.ValueError'>, 'NotImplemented': NotImplemented, 'map': <built-in
function map>, 'buffer': <type 'buffer'>, 'max': <built-in function max>,
'object': <type 'object'>, 'TabError': <type 'exceptions.TabError'>,
'callable': <built-in function callable>, 'ZeroDivisionError': <type
'exceptions.ZeroDivisionError'>, 'eval': <built-in function eval>,
'__debug__': True, 'IndentationError': <type 'exceptions.IndentationError'>,
'AssertionError': <type 'exceptions.AssertionError'>, 'classmethod': <type
'classmethod'>, 'UnboundLocalError': <type 'exceptions.UnboundLocalError'>,
'NotImplementedError': <type 'exceptions.NotImplementedError'>,
'AttributeError': <type 'exceptions.AttributeError'>, 'OverflowError': <type
'exceptions.OverflowError'>, 'WindowsError': <type
'exceptions.WindowsError'>}}
>>>

The OP wanted to clear the interpreter and I took a very broad (and highly
unresearched) stab at it, and saw some behavior that I wasn't expecting.
So before, all the builtin variables are hidden away in __builtins__, but
after clearing globals, they are filled into globals.  This doesn't really
make sense to me, but I don't know much about __builtins__ or globals.

I just realized this only happens in idle however.  From the python console,
clearing globals REALLY clears globals - even globals() is unbound when you
do that.  So it's not such a good thing to do :)
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From john106henry at hotmail.com  Tue May 13 15:31:52 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 12:31:52 -0700 (PDT)
Subject: Why can't I import this?
Message-ID: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>

Hi list,

I can't understand this.  The following import statement works fine:

    from PythonCard.templates.dialogs import runOptionsDialog

but this one fails:

    from PythonCard.tools.codeEditor.codeEditor import CodeEditor

I've checked and rechecked to make sure that the spellings are proper
and that the tools, the codeEditor directory, and codeEditor.py, and
the class CodeEditor all exists and yet idle keep complaining that it
can't import from PythonCard.tools.

What's going on?  (Running Python2.5 under WinXP).

Regards,


From salil_reeves at yahoo.co.in  Wed May 21 22:34:08 2008
From: salil_reeves at yahoo.co.in (salil_reeves)
Date: Thu, 22 May 2008 02:34:08 -0000
Subject: related to python
Message-ID: <g12m30+ejo5@eGroups.com>

develop a function called standardise_phrase to convert
the user's input to a standard form for subsequent processing. This 
involves:
1. removing all inter-word punctuation, which for our purposes is 
assumed to
consist only of commas (`,'), full stops (`.'), exclamation marks 
(`!') or
question marks (`?');
2. stripping away any leading and trailing blank spaces; and
3. replacing words in the user's input with ELIZA's preferred 
vocabulary.
how it is done ??
can anyone help me with it



From nicola.musatti at gmail.com  Fri May  2 10:07:32 2008
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: Fri, 2 May 2008 07:07:32 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <44f10aa9-6021-48b7-ae72-fa70f09a9d0e@f63g2000hsf.googlegroups.com>

On May 2, 3:50 pm, mcse jung <mcsej... at yahoo.com> wrote:
> Here is asample program that writes a program and then executes it.
> Do you knowof a much simpler way of writing a program that writes a program?

Use a templating engine, such as Cheetah: http://www.cheetahtemplate.org/

Cheers,
Nicola Musatti


From gherron at islandtraining.com  Tue May 13 16:49:44 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 13:49:44 -0700
Subject: Why can't I import this?
In-Reply-To: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
Message-ID: <4829FEE8.8050905@islandtraining.com>

John Henry wrote:
> Hi list,
>
> I can't understand this.  The following import statement works fine:
>
>     from PythonCard.templates.dialogs import runOptionsDialog
>
> but this one fails:
>
>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>   

This kind of "dotted" name import only works for packages, and a 
directory is considered a package only if it contains a file name 
__init__.py.    Looking around my installation of PythonCard (on Linux) 
I see that most of those directories *do NOT* have a __init__.py, so 
they are not packages and cannot be imported that way.


Of course this leaves unanswered the question of *how* you are supposed 
to import that code.   I've never used PythonCard so I can't help 
further, but I suggest looking at the documentation and examples 
supplied.  And perhaps waiting for someone with experience with 
PythonCard to answer.


Gary Herron

P.S. It is usually a waste of time to tell us that something fails 
without telling us *how* it fails.  (Cut and paste the error message 
always, and the traceback usually.)  If you don't, you will usually get 
a request to supply that information, and then have wast3ed the time for 
one full round of message to the group.  Even in this case, I'm only 
guessing how it failed for you.


> I've checked and rechecked to make sure that the spellings are proper
> and that the tools, the codeEditor directory, and codeEditor.py, and
> the class CodeEditor all exists and yet idle keep complaining that it
> can't import from PythonCard.tools.
>
> What's going on?  (Running Python2.5 under WinXP).
>
> Regards,
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gagsl-py2 at yahoo.com.ar  Mon May 26 11:52:25 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 12:52:25 -0300
Subject: Writing traceback of an exception into a log-file
References: <5213E58D85BC414998FA553C701E386C0EF281CB4D@SGBD012511.dlrmail.ad.delarue.com>
Message-ID: <op.ubrqdnidx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 05:31:27 -0300, <Dominique.Holzwarth at ch.delarue.com> escribi?:

> I'm trying to write the traceback stack of an exception that is thrown into a log file, but currently all that's written is simply a "None" :-/
>
> Here's some example code of what I'm doing:
>
> Import traceback
> class myException(Exception):
>         def __init__(self):
>                 f = open('filename.txt', 'a')
>                 traceback.print_exc(file=f)
>                 f.close()
>
> The file handling (opening etc) works ok (I'm using the same file in combination with a Logger() object too) but the string written to the file is effectively just a "None".
>
> Could anyone explain to me how to properly use the traceback module with it's countless of functions? =)

Don't inherit from Exception - you should be able to log *any* exception, not only this specific one, I presume? print_exc writes "the exception currently being handled", not the one you're creating right now. Put the code above into your exception handler:

try:
     1/0
except:
     f = open('filename.txt', 'a')
     traceback.print_exc(file=f)
     f.close()

(or define a function and call it from the exception handler)

-- 
Gabriel Genellina



From stef.mientki at gmail.com  Wed May 28 13:32:29 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Wed, 28 May 2008 19:32:29 +0200
Subject: definition of a highlevel language?
In-Reply-To: <d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>
Message-ID: <483D972D.8060802@gmail.com>

Avowkind wrote:
> On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
>   
>> (might not be the right forum for this but...)
>>
>> what is the definition of a highlevel-language?
>>
>> well there isnt one specifically and wikipedia and the like gives just
>> a very general description obv you can say it abstracts away lowlever
>> operations.
>>
>> yes but how?
>>
>> a function like map takes a function and applies it to a list for
>> example.
>> this abstracts away a common procedure like iterate through a list and
>> for every position do a computation.
>> so it is a higherorderfunction. is this how higher-level-languages are
>> built?
>>
>> so are they fundamentally differently built or is it just a lot of
>> lowlevel operations built on top of each other?
>>
>> haskell is considered a very highlevellanguage but can you do
>> systemsprogramming with it(yes maybe it is very unpractical i dont
>> know but can you)?
>>
>> is lambda calculus a more abstract and efficient way of modeling a
>> computer? meaning you start at a higher level of abstraction and can
>> work up to even higher even faster?
>>
>> how did lispmachines work? was the basic system programmed in LISP?
>>     
>
>
> A lot of the previous comments have been about levels of abstraction
> of the programming langauge - which may be the answer you want.
> Another way of looking at it is that we want to be able to move from
> the language of the solution domain - e.g. computers, bits and bytes
> to the language of the problem domain.
>
> When we think about 'level' we don't just want to look at how basic
> statements work. we also need to think about whether the language is
> capable of simply and clearly expressing the problem.
>
> If your problem domain is mathematics then mathcad and its ilk are
> near perfect high level programming languages as the programs look
> just like the problems.
>
>   
Andrew, that's very good description, and I totally agree !
> if your problem domain is controlling a water works then you may tend
> to write your problem like this:
>
> if the water level is over 10 metres then start pump
> if the water level is below 5 metres then stop pump
>   
I would go one step beyond that, and state the problem as:
"keep the reservoir full, but not too full"
> which in python might turn out to be
>
> if water_level > 10:
>     pump.start()
> if water_level < 5:
>     pump.stop()
>
> which is fairly close.
>   
And now the solution is less close ;-)
And it becomes even less close,
if we extend your solution somewhat more to a real world implementation,
something like this:

control = True
while control :
    if water_level > 10:
        pump.start()
    if water_level < 5:
        pump.stop()


And if you would propose this solution to a control system engineer,
he/she would say: "this solution works very bad" or even "this solution 
won't work"
A solution that would work, should incorporate at least a hysteresis and 
could look like this:

control = True
State   = False
while control :
  if State and ( water_level > 10 ) :
    pump.start()
    State = not ( State )
  elif not ( State )  and ( water_level < 5 ) :
    pump.stop()
    State = not ( State )

and now what's the resemblance to the orginal problem :
   "keep the reservoir full, but not too full"
;-)

So an adequate high level language,
should do exactly like a control engineer would do (btw I'm not a 
control engineer):
1- asking what do you mean by "full"
2- not asking what's the other level,
but asking what's the intended use: how often and how many water is 
added or used,
what are the costs of the pump, etc etc
after which
   the control engineer
       or
  the high level language
can calculate the optimal hysteresis.
> of course with the addition of some brackets C++ could be this clear
> too. The key though is the abstraction given by the pump class and
> implicitly by object oriented design.
>
>
> In this pattern Form designers, visual web page layout tools and their
> ilk are very high level - but only if your problem is that you need to
> design a lot of business forms or web pages.  Some problems are best
> described visually, some in text, some in mathematics.
>   
I agree that some problems are better described in one or the other form,
but it's not the major issue.
e.g. Flowcharts are a perfect high level solution for problems in many 
domains.
But flowcharts, just like computer languages, visual design languages 
and math,
are only valuable in the hands of domain experts.

What the major issue is,
    that makes a computer language or a design environment in general,
really high level,
is the availability of the domain expertise.

Therefor the only high level language I'm aware of is ...
... LabView

Labview offers a lot of domain expertise in almost any domain,
so anyone
  with just a little knowledge of the problem domain,
and
  with just a little programming experience or math knowledge,
can solve any problem in every domain with Labview.
Possibly I'm exaggerating a bit ;-)


cheers,
Stef

> Andrew.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From skanemupp at yahoo.se  Tue May 13 16:05:12 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 13:05:12 -0700 (PDT)
Subject: built in list generator?
Message-ID: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>

if i want  a list with all numbers between x and y is there a way to
do this with an inbult function.

i mean i can always construct a function to do this but is there
soemthing like:

nbrs = list(range(50,100, 2))


From hniksic at xemacs.org  Tue May 13 02:48:15 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 13 May 2008 08:48:15 +0200
Subject: py3k concerns. An example
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com>
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com>
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org>
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com>
	<4810977E.3060509@v.loewis.de>
	<201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
Message-ID: <87y76esnrk.fsf@mulj.homelinux.net>

Paul McGuire <ptmcg at austin.rr.com> writes:

> I see that there is some movement to "get rid of bound methods," but
> I don't fully understand how this will be done, nor how I will
> adjust my code to compensate.

Isn't it supposed to get rid of *un*bound methods?  That is,
Class.method will simply return the function object used to define
'method', rather than a specialized "unbound method" object.
object.method will continue to return bound method objects, which are
required for method calls to work.


From aahz at pythoncraft.com  Sun May 18 00:39:36 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:39:36 -0700
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <g0obu8$4vp$1@panix3.panix.com>

In article <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5 at j22g2000hsf.googlegroups.com>,
hdante  <hdante at gmail.com> wrote:
>
>How can I access Usenet without using Google Groups ? (my ISP doesn't
>have a NNTP server). Do you recommend doing so ?

If you'd like an ISP with a decent news server, I highly recommend
panix.com

>What's your prefered news reader ?

trn3.6, same as it's been for the last eighteen years.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From Lie.1296 at gmail.com  Fri May 23 03:20:29 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 23 May 2008 00:20:29 -0700 (PDT)
Subject: Python(2.5) reads an input file FASTER than pure C(Mingw)
References: <6a3f8226-04c6-4ee3-b5a6-f76aca44aa31@a23g2000hsc.googlegroups.com>
	<6420bfba-089d-41c6-a34f-b26e8b35afd7@x41g2000hsb.googlegroups.com> 
	<10e0c170-97ab-41bb-b501-f54790cc69ff@a70g2000hsh.googlegroups.com> 
	<f8d6c1e4-0118-487e-8d84-21993d467ab0@c58g2000hsc.googlegroups.com> 
	<983df81f-2d6a-4ee0-aea2-8780894fd706@a70g2000hsh.googlegroups.com> 
	<c4b94c10-92b4-4fa2-8595-f66186107cbe@a22g2000hsc.googlegroups.com> 
	<250c1ceb-1c0d-41e4-a3c6-25e20ac4f22c@a1g2000hsb.googlegroups.com> 
	<258c926b-47f2-4c8d-86ca-b97fc8abfb18@f36g2000hsa.googlegroups.com> 
	<2d06b319-e2fd-4790-af61-6f90b9b1b3b1@m1g2000pre.googlegroups.com> 
	<41e72e61-6413-41f3-a162-dbcc1ec5fcee@f63g2000hsf.googlegroups.com> 
	<f1aa0a0a-5c5f-4428-ad11-a2aba98be137@t12g2000prg.googlegroups.com> 
	<c7b349e1-3da1-412e-a617-9c299d8b73ed@c58g2000hsc.googlegroups.com>
Message-ID: <ac0d94c5-9b5e-43bc-aff5-c73a35f88159@t12g2000prg.googlegroups.com>

On Apr 30, 8:57?pm, n00m <n... at narod.ru> wrote:
> >>> a = ['zzz', 'aaa']
> >>> id(a[0]), id(a[1])
>
> (12258848, 12259296)>>> a.sort()
> >>> id(a[0]), id(a[1])
>
> (12259296, 12258848)
>
>

That proves you know nothing, that is a list operation, not a string
operation.


From daveparker at flamingthunder.com  Mon May 12 21:18:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 18:18:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
Message-ID: <bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>

On May 12, 7:12?pm, castiro... at gmail.com wrote:
> Mine's been always messing up the color wheel.

Messing up in what way?  Are you using the colors to visualize
something?


From mailpitches at email.com  Fri May  2 14:20:45 2008
From: mailpitches at email.com (mp)
Date: Fri, 2 May 2008 11:20:45 -0700 (PDT)
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
	<roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <1029ba0a-74e0-41d3-8397-7e326f4611bf@a9g2000prl.googlegroups.com>

Thanks Roy. I was just trying to understand someone else's code, but
in the end it turns out that this was just a bug.

What weirded me out was how injecting a print statement preventing the
error from occurring, but now I get it. Without blocking, the
connection handshake occurs in parallel after the connect_exc method
is called. In my example, my processor reaches the send call before
the connection manages to complete in the background. However, if you
stick in a print statement after the connect_exc call and before the
send call, it delays processing just long enough for the connection to
complete, thus no exception is thrown by the send call.


From bj_666 at gmx.net  Wed May 28 14:06:40 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 May 2008 18:06:40 GMT
Subject: while-loop?
References: <483d9ce7$0$3125$e4fe514c@dreader18.news.xs4all.nl>
Message-ID: <6a5l9gF34fb6rU2@mid.uni-berlin.de>

On Wed, 28 May 2008 19:56:55 +0200, huub wrote:

> Being a newbie with Python, I'm trying a short program with this:
> 
>  > <..>
>> t = RoboInterface()
>  > <..>
>> while not t.Digital(1): # while endpoint is not reached
>>  15         pass
> 
> However, it always hangs on the 'while', which I can't find in the 
> tutorial at http://www.python.org/doc/. Assuming 'while' should work, 
> what's wrong with the code?

Obviously the condition is alway true.  Maybe you have to do something
within the loop so it eventually will be false at some point!?

Ciao,
	Marc 'BlackJack' Rintsch


From ukaluzhny at nds.com  Thu May 15 04:17:33 2008
From: ukaluzhny at nds.com (urikaluzhny)
Date: Thu, 15 May 2008 01:17:33 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
Message-ID: <51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>

On May 15, 10:06?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> | It seems that I rather frequently need a list or iterator of the form
> | [x for x in <> while <>]
>
> I can think of two ways to interpret that.
I mean like [x for x in <A> if <B>], only that it breaks the loop when
the expression <B> is false.


From daveparker at flamingthunder.com  Wed May 21 16:56:48 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 13:56:48 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
Message-ID: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>

On May 21, 2:44?pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:

> My understand is no, not if you're using IEEE floating point.

Yes, that would explain it.  I assumed that Python automatically
switched from hardware floating point to multi-precision floating
point so that the user is guaranteed to always get correctly rounded
results for +, -, *, and /, like Flaming Thunder gives.  Correct
rounding and accurate results are fairly crucial to mathematical and
scientific programming, in my opinion.


From agustin.villena at gmail.com  Sun May 18 16:16:04 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Sun, 18 May 2008 13:16:04 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
Message-ID: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>

Hi!

is there anyway to show the class of a method in an exception's
traceback?

For example, the next code

class Some(object):
    def foo(self,x):
        raise Exception(x)

obj = Some()
obj.foo("some arg")

produces the next traceback

Traceback (most recent call last):
  File "<string>", line 231, in run_nodebug
  File "G:\dev\exceptions\sample.py", line 7, in <module>
    obj.foo("some arg")
  File "G:\dev\exceptions\sample.py", line 3, in foo
    raise Exception(x)
Exception: some arg

I want to improve the line
File "G:\dev\exceptions\sample.py", line 3, in foo

to
File "G:\dev\exceptions\sample.py", line 3, in Some.foo

Is this improvement feasible


From bockman at virgilio.it  Wed May 28 14:10:34 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Wed, 28 May 2008 20:10:34 +0200
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
	<2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>
	<1057dae0-43dd-477a-b686-5f79d0627161@27g2000hsf.googlegroups.com>
Message-ID: <pan.2008.05.28.18.10.31.229706@virgilio.it>

On Wed, 28 May 2008 11:38:53 -0700, RossGK wrote:

> 
> I've answered my own question about the "None" state - an event was
> setting the thread to None where I didn't expect it.
> 
> However, my question slightly repositioned is if a Thread is "Stopped"
> it still seems to exist. Is there someway to make it go away, send it
> to garbage collection etc?
> 
You have to call the join() method of the thread object from another
thread. This will terminate the thread and free its resources. This is
usually the task of the parent thread which usually does something
like:
     t = MyTread(...)
     t.start()
     # do your own stuff, then before quitting
     t.join() # Note that this waits until t is terminated



> Other part of the original Q - I assume a Stopped thread gets a false
> from "isAlive" and a Running thread gets a true?

Yes. You can try yourself:

>>> import threading
>>> class MyThread(threading.Thread):
	def __init__(self): threading.Thread.__init__(self)
	def stop(self): self._stop = True
	def run(self):
		self._stop= False
		while self._stop == False:
			import time
			time.sleep(0.1)

			
>>> t = MyThread()
>>> t.start()
>>> t.isAlive()
True
>>> t.isAlive()
False
>>> t.join()
>>> t.isAlive()
False


Ciao
----
FB


From kyosohma at gmail.com  Wed May 28 17:22:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 28 May 2008 14:22:49 -0700 (PDT)
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org> 
	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com> 
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
	<483d941f$0$9032$5402220f@news.sunrise.ch>
Message-ID: <eaaf1552-f64f-40b7-a1a1-f646ec03c688@p25g2000hsf.googlegroups.com>

On May 28, 12:19?pm, mblume <mbl... at socha.net> wrote:
> Am Tue, 27 May 2008 12:37:34 -0700 schrieb Dennis Lee Bieber:
>
> > ? ?From the library reference:
> > """
> > Support for the %Z directive is based on the values contained in tzname
> > and whether daylight is true. Because of this, it is platform-specific
> > except for recognizing UTC and GMT which are always known (and are
> > considered to be non-daylight savings timezones). """
>
> > ? ?The only value that passed for me was UTC (I didn't try GMT) but...
>
> For me, only UTC, GMT, CET and CEST (Central European [Summer] Time) work.
> My time.tzname is ('CET', 'CEST').
> I think the documentation must be read that ***only***
> UTC,GMT,time.tzname work.
>
> Also, time zone names are not unique: EST can be Eastern Summer Time (US)
> as well as Eastern Summer Time (Australia).
>
> For working with time zones, I think that a module like pytzhttp://pytz.sourceforge.net/
> may be better suited.
>
> My 0.02c.
> Martin

Yeah. The timezone part of Python's time module is probably it's
weakest link. There was a pretty long thread about it about a year
ago. Maybe 2.6 or the 3.0 branch will make it a little more friendly.

Mike


From python at bdurham.com  Mon May  5 10:22:59 2008
From: python at bdurham.com (python at bdurham.com)
Date: Mon, 05 May 2008 10:22:59 -0400
Subject: Browser + local Python-based web server vs. wxPython
Message-ID: <1209997379.28463.1251467095@webmail.messagingengine.com>

I'm looking at rewriting some legacy VB applications and am pondering
which of the following techniques to use:

1. Browser based GUI with local web server (Browser +
wsgiref.simple_server) (I'm assuming that simple_server is class I want
to build from for a local web server)

-OR-

2. wxPython based GUI

My thought is that a browser/local web server setup may be more portable
to mobile environments than wxPython and may offer a way to scale a
single user offline application to a multi-user online application using
a remote vs. local web server. Some groups of users may feel more
comfortable with a browser based interface as well.

I'm looking for feedback from anyone that has pondered the same question
as well as any pros/cons or tips from anyone that has chosen the
browser/lcoal web server route.

Thanks,

Malcolm


From daveparker at flamingthunder.com  Tue May 13 13:05:38 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:05:38 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
Message-ID: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>

> Just to support this statement: PHP runs an order of magnitude slower than
> python. Yet a great deal (if not the majority) of dynamic sites out there
> run under PHP. All of these are unhappy customers?

The websites owners might not be unhappy, but lots of customers
complain about slow websites, so if the market is competitive then
eventually the PHP fad will die out.

For example, Slashdot recently interviewed a successful website in a
competitive market -- online newspapers -- and found that to enhance
customer happiness the New York Times uses hand-coded HTML.

"He was asked how the Web site looks so consistently nice and polished
no matter which browser or resolution is used to access it. His answer
begins: 'It's our preference to use a text editor, like HomeSite,
TextPad or TextMate, to "hand code" everything, rather than to use a
wysiwyg (what you see is what you get) HTML and CSS authoring program,
like Dreamweaver. We just find it yields better and faster results.'"
http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss

"Faster" wins in a competitive market, so if a programming language
can't deliver "faster", it is a fad that will die out.


On May 13, 10:40?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > This shows how much you don't know about customers, and their needs. A
> > customer gives a s**t about 5-10 times faster sites. They care if it is
> > *fast enough*, but beyond that they don't bother. But what *always*
> > bothers them is development time & flexibility. Because that directly
> > affects the price they pay.
>
> Just to support this statement: PHP runs an order of magnitude slower than
> python. Yet a great deal (if not the majority) of dynamic sites out there
> run under PHP. All of these are unhappy customers?
>
> Diez



From fiacre.patrick at gmail.com  Fri May 23 06:15:41 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 06:15:41 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <69nigsF3499pqU2@mid.uni-berlin.de>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
Message-ID: <4836994e$0$11625$607ed4bc@cv.net>

Diez B. Roggisch wrote:
> Jimmy schrieb:
>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>> Jimmy wrote:
>>>> Hi to all
>>>> python now has grown to a versatile language that can
>>>> accomplish tasks for many different purposes. However,
>>>> AFAIK, little is known about its ability of kernel coding.
>>>> So I am wondering if python can do some kernel coding that
>>>> used to be the private garden of C/C++. For example, can python
>>>> intercept the input of keyboard on a system level? someone told me
>>>> it's a kernel thing, isn't it?
>>> http://wiki.python.org/moin/elmer
>>
>> well, straightly speaking, how can I know a key is pressed on a system-
>> level if
>> using python?
> 
> What has that todo with kernel programming? You can use e.g. pygame to 
> get keystrokes. Or under linux, read (if you are root) the keyboard 
> input file - I've done that to support several keyboards attached to a 
> machine.
> 
> And the original question: no, python can't be used as kernel 
> programming language. Amongst other reasons, performance & the GIL 
> prevent that.
> 
> Diez

http://www.kernel-panic.it/programming/py-pf/

Of course you can code kernel routines in Python -- you are just calling 
the underlying C interface.  The GIL means you have to manage 
threadsafety on your own -- it doesn't imply kernel programming can not 
be done.

I'm not talking about writing an OS in Python (though a simple DOS-like 
OS is very possible).  Nor would I suggest writing device drivers in 
Python -- but of course you can call kernel routines and manage some 
kernel resources effectively.  Python's IPC libraries expose kernel 
functionality.


From stefan_ml at behnel.de  Thu May 29 04:48:25 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 29 May 2008 10:48:25 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
	<94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>
Message-ID: <483E6DD9.4030801@behnel.de>

Kalibr wrote:
> On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
>> I have a requirement to compare 2 text files and write to a 3rd file
>> only those lines that appear in the 2nd file but not in the 1st file.
>>
>> Rather than re-invent the wheel I am wondering if anyone has written
>> anything already?
> 
> You can use the cmp(x, y) function to tell if a string is similar to
> another.

Or "==".

Stefan


From skanemupp at yahoo.se  Mon May  5 10:32:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:32:15 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
Message-ID: <a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>

On 5 Maj, 16:29, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
>
>
>
> > On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> > wrote:
>
> > > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> > > Are you sure that:
>
> > > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> > > Check it with python.
>
> > > --
> > > Regards,
> > > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> > >>> import os
> > >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>
> > False
>
> > but...it is there....
>
> > >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>
> > False
>
> > does it matter if i use / or \? which si recommended?
>
> i can find .png image in the same folder and when i just change
> filename from snake.png to example1.mp3 it is false.
>
> i renamed the file once, could that have anything to do with it?

\\ or \ or / all works.


the title of the mp3 is a long number still. i mena if i go to
properties the name is example1.mpg but the title if i go to details
is stillt he old one.


From ivan.illarionov at gmail.com  Thu May  1 11:02:20 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 15:02:20 +0000 (UTC)
Subject: Signals/Slots support in Python
References: <mailman.412.1209653087.12834.python-list@python.org>
Message-ID: <fvcm1s$303g$2@news.mtu.ru>

On Thu, 01 May 2008 08:44:27 -0600, Scott SA wrote:

> Did you review this?
>     <http://pydispatcher.sourceforge.net/>
> 
> from what I understand is originally based upon this:
>     <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87056>
> 
> and subsequently integrated into this:
>     <http://djangoproject.com>

AFAIK PyDispatcher evolved into Louie project [1]. Louie has more 
features, but dispatch module inside Django is dramatically faster and is 
going to be even faster.

[1] http://pylouie.org/

-- 
Ivan


From gblais at mitre.org  Tue May  6 08:17:43 2008
From: gblais at mitre.org (Blais, Gerard C.)
Date: Tue, 6 May 2008 08:17:43 -0400
Subject: calling variable function name ?
Message-ID: <0D6AD1CAA6E85548B5F1BCFE746B725C01D11A41@IMCSRV3.MITRE.ORG>

Sure!

 

Make a dictionary:

 

                fdict = {"A":fa, "B":fb, ... }

 

                Then consider

 

                x = "A"

 

                result = fdict(x)(param1, param2)

 

                should call fa without any if's...

 

                Gerry 

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From saluk64007 at gmail.com  Mon May 26 00:43:28 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 21:43:28 -0700
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>
Message-ID: <c3f69bf60805252143x418ee017x6b61b1ea161b37e@mail.gmail.com>

There are certainly situations where data hiding is useful and perhaps a
wanted feature, but there has to be at least one place where I can use what
I want when I want to with some high and mighty designer telling me what I
should and shouldn't access.  One of the reasons they have data hiding in
something like Java, is because often you will use get/set functions that
actually do more than tell you the value of an attribute.  Python uses
properties or overloaded functions for this same mechanism.

Because of this design, you are less likely to have to change an "internal"
attribute that is relied on in user code.  Instead of telling the user that
now they have to use a different function to get a value, or changing the
name of an attribute and confusing users, you can always proxy things making
the interface stay backwards compatible.

Obviously this doesn't suit all situations, every language consideration is
going to be good in some cases and bad in others.  Otherwise it wouldn't be
a choice.  Python has made an actual choice to NOT include this feature.
Things like properties or underscore conventions etc are alternative
solutions for things that data hiding is supposed to solve.  Obviously it is
open source, so if enough people complain loud enough it could change, but
this is something that has stuck for a long time, and also a reason many
long time python developers are still using it.  Just as open source
software allows users to do new things with old programmers or revive
projects which are dead; python allows libraries to be extended easily
protecting users from designers who think they know what we want to be able
to do with their code.

But yeah, in a situation where you want the freedom to change around
internal apis, and your customers won't follow your guidelines, I feel for
you :)  I think mostly we all fear that if true data hiding were added (a la
java), that it would be abused and not limited to situations you describe.
Which is not necesarily a valid assumption, since python has been around a
long time with the philosophy it has (it IS a philosophy and guides many
other python features or lack of features), and library writers may continue
to develop the way they have previously.  All of us who complain when anyone
mentions data hiding would not use these features, and I'm fairly sure the
system libraries would remain open.
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From daveparker at flamingthunder.com  Mon May 19 23:20:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:20:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
Message-ID: <3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>

> > I <davepar... at flamingthunder.com> wrote:
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python.

> On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> That's truly disappointing.

I guess I could have stated that better.  Flaming Thunder is a labor
of love for me.  I've programmed in almost every language since
FORTRAN and Lisp, and Flaming Thunder is the language I've always
wished the others were.

For one example, I've always preferred compiled languages because
they're faster.  So Flaming Thunder is compiled.

For another example, I've always preferred languages that are English-
like because it's easier to return to your code after several years
and still know what you were doing (and it's easier for someone else
to maintain your code).

For over 5 years I've been working on Flaming Thunder unpaid and on my
own, getting the back-end up and running.  8-by-8 shotgun cross
compilers written in assembly language, that can fit all of the
libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
OS X and Windows into a single executable file that's less than 180K,
aren't written overnight.

So now that I've released it, it's extremely gratifying that people
think it's cool enough to actually pay $19 for it.  That gives me lots
of motivation (and buys enough time) for me to add features to it as
fast as possible.

To whit: you pointed out the awkwardness in Python of having to
declare a for-loop variable when you only wanted to loop a specific
number of times and didn't need the variable.  Last week, Flaming
Thunder had the same awkwardness.  If you wanted to loop 8 times:

for i from 1 to 8 do <statement>

you still had to use a variable (in this case, i).  This week, I've
added two new for-loop variations that fix that awkwardness, and also
allow you to explicitly declare an infinite loop without having to
rely on idiomatic constructs such as while-true.  Examples of the two
new variations (for-forever and for-expression-times):

Write "Fa".
For 8 times do write "-la".

For forever do
  (
  Write "Do you know the definition of insanity? ".
  Read response.
  ).


From goldnery at gmail.com  Fri May 23 09:40:13 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 06:40:13 -0700 (PDT)
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
	<9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>
Message-ID: <5196bcc1-e840-456f-ac4d-a3841445362f@y38g2000hsy.googlegroups.com>

On May 23, 3:29 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 8:24 am, Gandalf <goldn... at gmail.com> wrote:
>
> > I try to reach a specific wx StaticText element's text and to change
> > it by clicking on a button
>
> > now let's say the this is my element:
>
> > wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>
> > And this is my EVT_BUTTON bind function :
>
> > def OnClick(event):
>
> > which code shude i enter to change "hello" to "goodbay"?
>
> > thanks
>
> You're probably looking for SetLabel(). So if you do something like
> this to instantiate the StaticText:
>
> self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
> style=wx.ALIGN_CENTRE)
>
> Then you can change your text by adding this to your OnClick event
> handler:
>
> self.myText.SetLabel("goodbye")
>
> Have fun! And remember, there's a great wxPython mailing list too:
>
> http://www.wxpython.org/maillist.php
>
> Mike

Thanks!


From mensanator at aol.com  Sun May 18 20:45:36 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 17:45:36 -0700 (PDT)
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <a2ee841c-eb32-4841-a7d5-d4af63319a7a@m36g2000hse.googlegroups.com>

On May 18, 7:34?pm, cmoller <cmol... at dpbioventures.com> wrote:
> Hi,
>
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
>
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical.

It ought to be as long as you have the modules to
interface with Excel and know how to use them.

Although MS-Access might be a better choice than Excel
as both products have the same graphing capabilities
but Access might be a better choice for capturing data.

And Python can easily insert data into Access.

> I am not in a hurry and would approach the problem as a way
> to learn.
>
> The data I am processing is readily seen via telnet so I know it's
> there.
>
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?
>
> Thanks,
>
> Chris



From cliveswan at yahoo.co.uk  Fri May  9 06:30:05 2008
From: cliveswan at yahoo.co.uk (Clive_S)
Date: Fri, 9 May 2008 03:30:05 -0700 (PDT)
Subject: Pythonwin
Message-ID: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>

Hi

I am trying to use Python with ArcGIS.

I have installed Python 2.4. I have an icon for IDLE and command line.
I do not see Python PythonWin.

How do you install or launch pythonwin??

Thanks

Clive


From dannywebster at googlemail.com  Fri May  9 10:21:04 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 07:21:04 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<7xabizkdui.fsf@ruckus.brouhaha.com>
Message-ID: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>

On May 9, 10:48 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> dannywebs... at googlemail.com writes:
> > I have a dictionary of which i'm itervalues'ing through, and i'll be
> > performing some logic on a particular iteration when a condition is
> > met with trusty .startswith('foo').  I need to grab the previous
> > iteration if this condition is met.  I can do something with an extra
> > var to hold every iteration while iterating, but this is hacky and not
> > elegant.
>
> You cannot rely on the elements of a dictionary being in any
> particular order (dicts are internally hash tables), so the above
> is almost certainly ont what you want.


Hi - thanks for your reply.  How about if I made the dict into a list
(of
which I have done).  How would I then reference the previous item?
Can they
be indexed?


From castironpi at gmail.com  Fri May  9 09:48:10 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 06:48:10 -0700 (PDT)
Subject: bytes1.shuffle( )
Message-ID: <19f01f35-49af-4d63-afa5-b21526818e21@k37g2000hsf.googlegroups.com>

random.shuffle( bytes1 )

if random == bytes:
   repunctuate( sentence )
else:
   random.shuffle( [ random ] )

sincerely exit, ()


From marek.rocki at wp.pl  Tue May 27 06:08:27 2008
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: Tue, 27 May 2008 03:08:27 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>

Since the "+=" operator won't work on methods, you have to write your
own class that will simulate dispatching multiple handlers for an
event. Maybe something like the following? I don't know, though, if it
would cooperate with PyQt nicely.

class MultiHandler(object):
	def __init__(self, owner, *initial_handlers):
		self.owner = owner
		self.handlers = list(initial_handlers)
	def __iadd__(self, handler):
		self.handlers.append(handler)
		return self
	def __call__(self, *args, **kwargs):
		for handler in self.handlers:
			handler(self.owner, *args, **kwargs)
		return None


class Calendar(object):
	def on_paint(self):
		print 'i am the default handler'

def handler1(self):
	print 'i am handler 1'

def handler2(self):
	print 'i am handler 2'


calendar = Calendar()
calendar.on_paint = MultiHandler(calendar, Calendar.on_paint)

calendar.on_paint()
calendar.on_paint += handler1
calendar.on_paint()
calendar.on_paint += handler2
calendar.on_paint()


From eliben at gmail.com  Sat May 17 11:13:25 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 08:13:25 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
Message-ID: <b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>

On May 17, 3:23 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 17, 4:42 am, eliben <eli... at gmail.com> wrote:
>
>
>
> > Hello,
>
> > I'm getting into Python now after years of Perl, and as part of my
> > research I must understand how to do some common tasks I need.
>
> > I have a bunch of Windows PCs at work to which I want to distribute an
> > application I've developed on my PC. All these PCs have Python 2.5
> > installed.
>
> > If my application contains only code I've developed, I simply zip its
> > directory with .py files and send it to everyone, who can then use it
> > by running the entry-point .py file. However, what if I've installed
> > some 3rd party modules on my PC, and my application uses them (for
> > example pyparsing, PiYAML and some others) ? I don't want to manually
> > install all these packages (there may be dozens of them) on all those
> > PCs (there may be dozens of those too). What is the best method I can
> > use ? Naturally, I want all the non-standard packages my app uses to
> > be detected automatically and collected into some kind of convenient
> > distributable that is easy to pass around and run.
>
> > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > executables, and I don't want to distribute those all the time. I much
> > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > Thanks in advance,
> > Eli
>
> You might want to check out Buildout. It allows you to run all that
> stuff in it's own virtual world, so to speak. I'm planning on playing
> with it this week.
>

I looked at its examples and I'm not sure it's what I need. It seems
useful for other cases though.

> Also, there's this site which has collected the various means of
> distributing Python apps:
>
> http://www.freehackers.org/Packaging_a_python_program
>

This page only talks about the packagers that create .exe files that
don't need Python installed.


Is there a simple way to find out which packages are used by my
script ?

Eli


From sajmikins at gmail.com  Wed May 21 01:18:59 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Tue, 20 May 2008 22:18:59 -0700 (PDT)
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
Message-ID: <e530ee93-ab63-4d2a-a52f-0d8ff4895af8@a32g2000prf.googlegroups.com>

On May 20, 5:59 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> There's an occasional question here about how to get python to launch
> pdb on encountering an uncaught exception.  The answer is to look in
> some ASPN recipe and do some weird magic.  I guess that works, but
> it's another thing to remember or keep looking up when the occasion
> arises (some program crashes unexpectedly).  I find myself manually
> adding tracing instead, finding out that I did it wrong and having to
> re-launch a long-running program, etc.
>
> I'd like to propose that debug-on-exception be made into a standard
> feature that is easy to enable, e.g. with a command line option
> or with a simple pdb call immediately after the import:
>
>   import pdb
>   pdb.debug_on_exception(True)
>   ...
>
> Would there be big obstacles to this?  It would have saved me
> considerable hassle on a number of occasions.  I'm constantly
> processing large data sets that will munch along happily for hours and
> hours before hitting some unanticipated condition in the data, and it
> would be great to trap immediately rather than have to analyze the
> resulting stack dump and restart.


This is not exactly an answer to your proposal, I know, but FWIW
Ipython has exactly this capability.

Regards,
~S


From squareswallower at 1ya2hoo3.net  Thu May  8 19:52:53 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Thu, 8 May 2008 17:52:53 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
Message-ID: <g003ol$fi$1@news.xmission.com>

>> On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com>
> 
>> said:
>> 
>>> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.ne
> t>
>>> wrote:
>>> 
>>>> Hi All,
>>>>  I wrote a program that takes a string sequence and finds all the wo
> rds
>>> 
>>>> inside a text file (one word per line) and prints them:
>>>>  def anagfind(letters): 	#find anagrams of these letters
>>>> 	fin = open('text.txt')	#one word per line file
>>>> 	wordbox = []		 #this is where the words will go
>>>> 	for line in fin:
>>>> 		word = line.strip()
>>>> 		count = 0
>>>> 		for char in letters:
>>>> 			if char not in word:
>>>> 				break
>>>> 			else:
>>>> 				count += 1
>>>> 			if count == len(word):
>>>> 				wordbox.append(word)
>>>> 	return wordbox
>>>>  Now I'd like to modify the code to naturally find all anagrams insi
> de
>>> a
>>>> wordlist.  What would be the best way to do this?  Using Hints?  Is
> it
>>> 
>>>> possible to iterate over dict keys?  How can I make a dict that maps
> 
>>> 
>>>> from a set of letters to a list of words that are spelled from those
> 
>>> 
>>>> letters?  Wouldn't I need to make the set of letters a key in a dict
> ?
>>>>  As always - Thanks for helping someone trying to learn...
>>>>  Dave
>>>> 
>>>  Suggestion: for each word, sort their characters and use them as the
> 
>>> dictionary key.  If two words have the same combination of characters
> ,
>>> then they are anagrams.  For example: "edam" and "made" are anagrams
>>> because they have the letters 'a', 'd', 'e' and 'm'.
>>>  Refer "Programming Pearls" by Jon Bentley.
>>>  --
>>> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salarima
> n</
>>> a>
>> 
>> 
> 
> Your code is always going to return the same list because every word is  an
> anagram of itself.
> 
> Tip: Create a list for each dictionary key, then add a word to the list  if
> that word is not in the list.  So:
> 
> mapdic('adem') --> ["edam", "made"]
> 
> P.S. When replying, the convention is to add your response to the bottom ,
> not top of the message.
> 
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</ a>

I got it!  Thanks for all your help!!!  Please tell me what you think:

def anafind():
            fin = open('short.txt')			#one word per line
            mapdic = {}					#this dic maps letters to anagrams
            for line in fin:
                        line = line.strip()
                        templist = sorted(list(line))	#sort letters
                        newtlist = (''.join(templist)) 	#join letters
                        if newtlist not in mapdic:
                                    mapdic[newtlist] = [line]
                        if line not in mapdic[newtlist]:
                                    mapdic[newtlist].append(line)
            for value in mapdic.values():
                        if len(value) <= 1:
                                    pass
                        else:
                                    print value




From upton at virginia.edu  Fri May 16 17:22:04 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 17:22:04 -0400
Subject: can't delete from a dictionary in a loop
Message-ID: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>

This might be more information than necessary, but it's the best way I
can think of to describe the question without being too vague.

The task:

I have a list of processes (well, strings to execute said processes)
and I want to, roughly, keep some number N running at a time.  If one
terminates, I want to start the next one in the list, or otherwise,
just wait.

The attempted solution:

Using subprocess, I Popen the next executable in the list, and store
it in a dictionary, with keyed on the pid:
(outside the loop)
procs_dict={}

(inside a while loop)
process = Popen(benchmark_exstring[num_started], shell=true)
procs_dict[process.pid]=process

Then I sleep for a while, then loop through the dictionary to see
what's terminated.  For each one that has terminated, I decrement a
counter so I know how many to start next time, and then try to remove
the record from the dictionary (since there's no reason to keep
polling it since I know it's terminated).  Roughly:

for pid in procs_dict:
  if procs_dict[pid].poll() != None
   # do the counter updates
   del procs_dict[pid]

The problem:

RuntimeError: dictionary changed size during iteration

So, the question is: is there a way around this?  I know that I can
just /not/ delete from the dictionary and keep polling each time
around, but that seems sloppy and like it could keep lots of memory
around that I don't need, since presumably the dictionary holding a
reference to the Popen object means the garbage collector could never
reclaim it.  Is the only reasonable solution to do something like
append all of those pids to a list, and then after I've iterated over
the dictionary, iterate over the list of pids to delete?

(Also, from the implementation side, is there a reason the dictionary
iterator can't deal with that?  If I was deleting from in front of the
iterator, maybe, but since I'm deleting from behind it...)


From alan.wright at volubill.com  Wed May 21 12:37:48 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 17:37:48 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
	<roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <3KadnXuJQ5VA0qnVRVnyuAA@pipex.net>

Thanks Roy, will give it a go.

infact there is no need for any IT phone calls, I am the owner of this 
network

Very simple [bunch of clients]----[box under test]----[bunch of servers]

Now i should be able to hammer them ;)

Alan

"Roy Smith" <roy at panix.com> wrote in message 
news:roy-6BB9DC.08271421052008 at 70-1-84-166.area1.spcsdns.net...
> In article <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net>,
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks Roy
>>
>> Any ideas how to code this child process stuff, as I said I am newbie and
>> not from a coding background
>
> The easiest thing would be to use os.system().  If you wanted to spawn 10
> child processes, you could do:
>
> import os
> for i in range(10):
>    os.system ("./child.py &")
>
> and then have child.py be a script that creates 1000 TCP connections.
>
> Keep in mind that one man's stress test is another man's denial of service
> attack.  If there are any firewalls between you and your target, they may
> restrict the number of connections you get to make (or the rate at which
> they're created).  You may also get a polite phone call from your local IT
> people asking enquiring about your activities. 




From python at bdurham.com  Wed May 14 08:54:27 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 14 May 2008 08:54:27 -0400
Subject: [ANN]  PPyGui emulator
In-Reply-To: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
Message-ID: <1210769667.16137.1253105601@webmail.messagingengine.com>

Stef,

Looks great!!

Malcolm


From bignose+hates-spam at benfinney.id.au  Mon May 12 19:03:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 13 May 2008 09:03:53 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
Message-ID: <87skwn5dly.fsf@benfinney.id.au>

Carl Banks <pavlovevidence at gmail.com> writes:

> IMHO, whether a varibale is used or not has got to be one of the least
> important things of all (in no small part because it's easily
> discernable from nearby code).

I couldn't disagree more.

If you're binding a name to a value that will never be used, you're
doing me (the reader of the code) a great favour if you indicate
clearly and concisely that this value is not intended to be referenced
anywhere else. Saving time for the reader is a very important job of
the writer of code.

> Having said that, if you do think it's most important to document
> whether something is used, I would suggest not using "_" (because
> it's conflicts with gettext conventions) or "dummy" (because it's
> misleading) for it.

Agreed.

Note, too, that the ideal answer to this is "don't bind names at all
to values that will never be used". It's only because the specifics of
Python's 'for' statement require us to do this that we are discussing
the ramifications of what to do when what Python requires of us is
actually unnecessary for our purposes.

-- 
 \          "Friendship is born at that moment when one person says to |
  `\      another, 'What! You too? I thought I was the only one!'"  -- |
_o__)                                                       C.S. Lewis |
Ben Finney


From windypower at gmail.com  Tue May 13 21:18:24 2008
From: windypower at gmail.com (WindPower)
Date: Tue, 13 May 2008 18:18:24 -0700 (PDT)
Subject: Desktop notifications on Windows
References: <0db266c1-50ad-4e01-b508-57c9a8febb4b@a22g2000hsc.googlegroups.com>
	<mailman.230.1209199953.12834.python-list@python.org>
	<60516dea-2c40-47d2-b816-8d9169399d86@c58g2000hsc.googlegroups.com>
	<50466177-f999-4952-9123-57b9c3f9b6ec@f63g2000hsf.googlegroups.com>
Message-ID: <ad339684-5f3d-419a-8e4a-d0d7439171e1@e53g2000hsa.googlegroups.com>

On Apr 26, 11:42 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On Apr 26, 4:08 pm, WindPower <windypo... at gmail.com> wrote:
>
>
>
> > On Apr 26, 4:52 am, David <wizza... at gmail.com> wrote:
>
> > > On Sat, Apr 26, 2008 at 4:41 AM,  <windypo... at gmail.com> wrote:
> > > > I'm looking for a way to implement desktop notifications (much like an
> > > >  instant messaging program or a mail notifier) within my Python
> > > >  application, on Windows only (no Gtk/Galago, please). I need no more
> > > >  than a simple text-based notification, which should be clickable and
> > > >  have a timeout, nothing else. I do not want to use Windows's "balloon
> > > >  tips", either. Any suggestions?
> > > >  --
>
> > > You could use Tkinter, which comes with Python.
>
> > The problem is that Tkinter cannot (I haven't looked at it in details,
> > so correct me if I'm wrong) create notifications the way I want them;
> > it can only create standard dialogs or top-level dialogs, both of
> > which steal the focus of other applications, while I want these
> > notifications not to interfere with anything (and possibly not be
> > displayed if an application is already running in fullscreen).
>
> wxPython can do this. They have a wx.PopupWindow that does this and
> comes with wxPython or you can use the more advanced custom Toasterbox
> widget that I found here:
>
> http://xoomer.alice.it/infinity77/main/freeware.html#toasterbox
>
> I've used both, but the latter gives more control of the "look &
> feel".
>
> Hope that helps!
>
> Mike

Thanks, this is exactly what I was looking for!


From inhahe at gmail.com  Tue May 13 14:56:28 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 14:56:28 -0400
Subject: list index out of range
References: <mailman.1068.1210704380.12834.python-list@python.org>
Message-ID: <dulWj.65238$%15.28030@bignews7.bellsouth.net>

random.randint(x,y) returns a random integer between _and including_ x and 
y, so randint(0, len(deck)) might return len(deck) and since python's 
indices start at 0, the maximum index is len(deck)-1.

rather than using randint(0,len(deck)-1) you could just do
card = random.choice(deck)
HAND.append(card)
deck.remove(card)

although it would be more efficient to do remove card by index which then 
gets us back to using randint, like this

i = random.randint(0, len(deck)-1)
HAND.append(deck[i])
del deck[i]

but i guess speed probably isn't a big factor here

also you could have done
i=random.randint(0, len(deck)-1)
HAND.append(deck.pop(i))






"Georgy Panterov" <gpanterov at yahoo.com> wrote in message 
news:mailman.1068.1210704380.12834.python-list at python.org...
I am a relatively new python user. I am writing an economic simulation of a 
card-game. The simulation runs fine for a few iteration but then it gives an 
error of "list index out of range."

The strange thing is that it will sometimes run for 10 iterations sometimes 
for only a few and sometimes won't run at all (seemingly arbitrary).
Here is some of the code:

for _ in range(100):
    handA=deal_hand(DECK) #deals 2 'hole' cards from a DECK
    handB=deal_hand(DECK)
    print handA
    print handB
    deal_flop(handA,handB,DECK) #appends 3 cards to handA and handB
    deal_current(handA,handB,DECK) #appends one more card
    deal_rake(handA,handB,DECK) #appends one more card
    DECK.extend(list(set(handA+handB))) #returns the cards to the DECK
    print winner(handA,handB) #returns 0-draw 1 -playerA win, 2-playerB win

The error message is :

['08C', '10H']
['07S', '03C']
--------
['06C', '02H']
['04D', '12S']
--------
['11H', '14S']
['06S', '04S']
--------

Traceback (most recent call last):
  File "G:\Other Stuff\POKER4.py", line 267, in <module>
    handB=deal_hand(DECK)
  File "G:\Other Stuff\POKER4.py", line 13, in deal_hand
    HAND.append(deck[i])
IndexError: list index out of range

In this case it ran 3 times. It will sometimes run for up to 9-10 times. It 
seems to be arbitrary but I can't get it to run more than 12 times.

Here is the code for the --deal_***-- functions:

def deal_hand(deck):
    HAND=[]
    for _ in range(2):
        i=random.randint(0,len(deck)) #produces a random card from the deck
        HAND.append(deck[i]) # appends the card to the players' hand list
        deck.remove(deck[i]) #removes the card from the deck
    return HAND

def deal_flop(hand1,hand2,deck):
    for _ in range(3):
        i=random.randint(0,len(deck))

        hand1.append(deck[i])
        hand2.append(deck[i])
        deck.remove(deck[i])

I would appreciate any help with this
Thanks
George


Send instant messages to your online friends http://uk.messenger.yahoo.com 




From Scott.Daniels at Acm.Org  Sun May 25 16:56:01 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 13:56:01 -0700
Subject: raising an exception when multiple inheritance involves same
	baseThank
In-Reply-To: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
References: mailman.1567.1211722656.12834.python-list@python.org
	<0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <EJKdnfZic_HUTaTVnZ2dnUVZ_uGdnZ2d@pdx.net>

Here are some tweaks on both bits of code:

Paul McGuire wrote:
> On May 25, 8:37 am, Michael Hines <michael.hi... at yale.edu> wrote:
...
>>     m = False
>>     for b in bases :
>>       if hasattr(b, '__mro__'):
>>         for bb in b.__mro__ :
>>           if bb == MetaHocObject.ho :
>>             if m == True:
>>               raise Exception("Inheritance of multiple HocObject not
>> allowed")
>>             m = True
     m = []
     for b in bases:
         if hasattr(b, '__mro__'):
             if MetaHocObject.ho in b.__mro__:
                 m.append(b)
     if m:
         raise TypeError('Multiple Inheritance of HocObject by %s '
                 'not allowed.' % ', '.join(b.__name__ for b in m))

Rationale:
   (1) "if m == True" is always a flag for trouble.
   (2) When you detect a problem and raise an exception, provide
       information about what was wrong.
   (3) There is no need to report error conditions early.  Accumulate
       information and complain (if it can be done without much extra
       code) exhaustively because a failure case should not be in the
       performance-limiting section anyway.

> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
> 
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

Warning: any two "new-style" classes as parents are necessarily involved
in diamond inheritance (because object will be a common superclass).
I'd make sure you produce (or can produce) all common super-classes,
so you can filter the list to what you want.  Maybe something like this:
     def diamond_points(class_):
         seen = dict((b, set([class_])) for b in class_.__bases__)
         for b in class_.__bases__:
             if hasattr(b, "__mro__"):
                 for m in b.__mro__:
		    if b != m:
                         seen.setdefault(m, set()).add(b)
         for subclass, sources in seen.items():
             if len(sources) == 1:
                 seen.pop(subclass)
         return seen

Then you can do a test like:
     trouble = diamond_points(class_)
     if trouble and (len(trouble) > 1 or object not in trouble):
         # you know you have a problem
         # If you only have forbidden multi-roots, you could
         #  test if set(trouble) & forbidden_multi_parents: ...
         if object in trouble:
             trouble.pop(object)  # Avoid simply new-style classes
         for common_ancestor, progeny in trouble.items():
             print common_ancestor.__name__, 'used by:', ' & '.join(
                                     child.__name__ for child in progeny)


--Scott David Daniels
Scott.Daniels at Acm.Org


From bockman at virgilio.it  Thu May 15 06:41:31 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Thu, 15 May 2008 03:41:31 -0700 (PDT)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <905611fd-e5c4-478f-a0bd-417ccc5fe0a1@d77g2000hsb.googlegroups.com>

On 15 Mag, 12:08, Gabriel <g... at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
> >>> tasks = [[]]*6
> >>> tasks
>
> [[], [], [], [], [], []]>>> tasks[0].append(1)
> >>> tasks
>
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
> I got this example from page 38 of Beginning Python.
>
> Regards
>
> Gabriel

The reason is that
    tasks = [[]]*6
creates a list with six elements pointing to *the same* list, so when
you change one,
it shows six times.

In other words, your code is equivalent to this:
>>> a = []
>>> tasks = [a,a,a,a,a,a]
>>> a.append(1)
>>> tasks
[[1], [1], [1], [1], [1], [1]]


Insead, to create a list of lists, use the list comprehension:

>>> tasks = [ [] for x in xrange(6) ]
>>> tasks[0].append(1)
>>> tasks
[[1], [], [], [], [], []]
>>>

Ciao
-----
FB


From tgrav at mac.com  Sat May 31 10:11:13 2008
From: tgrav at mac.com (Tommy Grav)
Date: Sat, 31 May 2008 10:11:13 -0400
Subject: SMS sending and receiving from website?
In-Reply-To: <2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
	<2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
Message-ID: <BA072DEE-4111-4132-9114-1B0F182A530E@mac.com>


On May 31, 2008, at 10:01 AM, globalrev wrote:
> also, lets say i want to send a SMS to my own phone from the internet.
> how would i do that?

While I have seen services that allow you to do that (it has been  
awhile),
i think you need to contact a service provider if you want to do this on
any scale beyond a few messages per month. This is a service that is
going to cost you to implement.

Cheers
   Tommy


From mcknight0219 at gmail.com  Tue May 13 06:16:14 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Tue, 13 May 2008 03:16:14 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com> 
	<g0b52s$53r$1@news.mtu.ru>
	<mailman.1026.1210668125.12834.python-list@python.org>
Message-ID: <db74e34c-b304-4ab0-befe-7bd2c9c70493@t12g2000prg.googlegroups.com>

On May 13, 4:41 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 01:22:52 -0300, Ivan Illarionov
> <ivan.illario... at gmail.com> escribi?:
>
>
>
> > On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:
> >>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
> >>> > wrote:
>
> >>> > >  can anyone tell me, in python, how to obtain some information of
> >>> > >  a running program?
> >>> > >  paticularly, if i am playing some music in audacious or other
> >>> > >  media player, how can i get the the name and some other info of
> >>> > >  current playing song? It seems that audicious doesn't output on
> >>> > >  run-time --
>
> >> Your best bet is if the *specific* program you're interested in (e.g.
> >> audacious) exposes this information programmatically in some way. It's
> >> up to the developers of this application if and how they choose to do
> >> it. Even if they do it, there's no requirement that the same API will
> >> work for any other program of the same category, unless there is some
> >> popular industry standard that most applications implement.
>
> > George, have you read my post in this thread? What OP wants is actually
> > possible and it's quite easy. X server is the "superprogram" that knows
> > the names of all GUI window titles.
>
> That relies on the fact that audacious (or whatever player used) actually
> includes the song name as part of its window title. As G. Sakkis said,
> this depends on the specific program used. And what about "some other info
> of current playing song"?
>
> --
> Gabriel Genellina

since it's for lyrics displaying. you have to know time of where it is
playing,
 the control of user, etc.


From kyosohma at gmail.com  Sat May 17 08:23:54 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 17 May 2008 05:23:54 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>

On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
>
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
>
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
>
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> Thanks in advance,
> Eli

You might want to check out Buildout. It allows you to run all that
stuff in it's own virtual world, so to speak. I'm planning on playing
with it this week.

Also, there's this site which has collected the various means of
distributing Python apps:

http://www.freehackers.org/Packaging_a_python_program

Hope that helps!

Mike


From sjmachin at lexicon.net  Thu May 15 12:40:37 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:40:37 -0700 (PDT)
Subject: How do I use the unpack function?
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
Message-ID: <d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>

On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> Marlin Rowley wrote:
> > All:
>
> > I've got a script that runs really slow because I'm reading from a
> > stream a byte at a time:
>
> > // TERRIBLE
> > for y in range( height ):
> >         for color in range(4):
> >             for x in range( width ):
> >                 pixelComponent = fileIO.read(4)
> >                 buffer = unpack("!f",pixelComponent)  << unpacks ONE

[snip]
Perhaps the OP might be able to use the Python Imaging Library (PIL)
instead of reinventing an image-file handler.


From kyosohma at gmail.com  Wed May  7 10:52:23 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 07:52:23 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <92d490e1-a8fe-4050-887b-d83cae4b8378@24g2000hsh.googlegroups.com>

On May 7, 9:08?am, "parag_p... at hotmail.com" <parag_p... at hotmail.com>
wrote:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
>
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python

There are lots of bigger projects to work on. Check out Spambayes, the
original bittorrent, or Zope for some of the more well known ones.

Mike


From maxm at mxm.dk  Thu May  1 14:15:55 2008
From: maxm at mxm.dk (Max M)
Date: Thu, 01 May 2008 20:15:55 +0200
Subject: tool to calculate color combination
In-Reply-To: <48193734.4010108@al.com.au>
References: <48193734.4010108@al.com.au>
Message-ID: <fvd1cr$nhn$1@ger.gmane.org>

Astan Chee skrev:
> Hi,
> I was just wondering if there is a tool/script in python that allows me 
> to do color calculations; specifically, when I add them.

There is the colorsys module which I have used in this class:




from colorsys import rgb_to_hls, hls_to_rgb
import binascii
from types import StringType, TupleType, ListType, IntType, FloatType
from math import modf

class RGB:
     """ Makes it easier to work with rgb colors """

     def __init__(self, color):
         # set color value
         self.color = self.any2color(color)

     def any2color(self, color):
         """
         Takes a number of color formats and returns a sequence of 3 
floats:
         (r,g,b)
         Some legal formats for pure blue are: 
'0x0000FF','#0000FF','0000FF',
         [0.0, 0.0, 1.0], [0, 0, 255], (0, 0.0, 'FF') and ('0', '0', 'f').
         Mixed types are allowed in sequences.
         """
         # it must be a hex, so convert to sequence of hex values
         if isinstance(color, StringType):
             # handle hex value
             if color[:2].lower() == '0x': color = color[2:]
             elif color[0] == '#': color = color[1:]
             color = (color[:2], color[2:4], color[4:])
         # convert sequence to floats
         color_result = []
         a = color_result.append
         for part in color:
             # what type is the part?
             if isinstance(part, StringType): # hex part
                 if len(part) == 1:
                     part = '0%s' % part
                 b = binascii.a2b_hex(part)
                 a(ord(b[0])/255.0)
             elif isinstance(part, IntType): # int part
                 a(part/255.0)
             elif isinstance(part, FloatType): # float part
                 a(part)
         return color_result


     def __str__(self):
         "Returns string representation of color (same as html_hex)"
         return self.html_hex()


     def r(self):
         return self.color[0]

     def g(self):
         return self.color[1]

     def b(self):
         return self.color[2]


     def bytes(self):
         """
         Takes a sequence of colors in floats, and returns a sequence of 
int in
         the range 0-255
         """
         return map(lambda x: int(x*255), self.color)


     def html_hex(self):
         """
         Returns the color in a hex string representation of the form 
'#0000FF'
         """
         r,g,b = self.color
         return '#%02X%02X%02X' % (int(r*255),int(g*255),int(b*255))


     def _cAdd(self, x, y):
         "Private method! Cirkular add x+y so value allways in 0.0-1.0 
range"
         fractional, integer  = modf(x + y)
         if not fractional and integer: # special case 1.0
             return 1.0
         return abs(fractional)
         # wrong result for negative values!


     def hls_delta(self, dh, dl, ds):
         """
         Returns a Color object same as self, but adjusted by delta hls
         values
         """
         h,l,s = rgb_to_hls(*self.color)
         nh = self._cAdd(h, dh)
         nl = l + dl
         if nl > 1.0: nl = 1.0
         if nl < 0.0: nl = 0.0
         ns = s + ds
         if ns > 1.0: ns = 1.0
         if ns < 0.0: ns = 0.0
         return RGB(hls_to_rgb(nh, nl, ns))


     def change_ls(self, new_l=None, new_s=None):
         """
         Returns a Color object same as self, but with new lightness and
         saturation levels
         """
         h,l,s = rgb_to_hls(*self.color)
         if new_l == None:
             new_l = l
         if new_s == None:
             new_s = s
         return RGB(hls_to_rgb(h, new_l, new_s))


     def spacer(self, transparent=None):
         """
         Creates a 1x1 GIF89a of color. If no color it returns a 
transparent gif
         Should probably not be in this module?
         """
         template = [71, 73, 70, 56, 57, 97, 1, 0, 1, 0, 128, 0, 0, 255, 
255,
         255, 0, 0, 0, 33, 249, 4, 1, 0, 0, 0, 0, 44, 0, 0, 0, 0, 1, 0, 
1, 0,
         0, 2, 2, 68, 1, 0, 59]
         if not transparent:
             template[13:16] = self.bytes() # set rgb values
             template[22] = 0 # remove transparency
         return ''.join(map(chr, template))



if __name__=='__main__':

     red     = (255, 0, 0)
     green   = (0.0, 1.0, 0.0)
     blue    = (0.0, 0.0, 1.0)
     yellow  = '#ffff00'

     col = RGB(blue)
     print col.color
     print col.bytes()
     print col

     brighter = col.change_ls(0.0, 0.0)
     print 'brighter:',brighter

#    complementary = col.hls_delta(0.50, 0.0, 0.0)
#    print complementary


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From artasis at gmail.com  Mon May  5 06:06:35 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Mon, 5 May 2008 03:06:35 -0700 (PDT)
Subject: use php in python httpservers
Message-ID: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>

Hi, that is my task:
I need to create python webserver-like extension(dll) which will run
php and python scripts as plugins.
I have no problems with dll creating and run python scripts, but I
cannot understand how to run php(CLI is not a solution).
Is there a way to solve this problem? I've thought to implement php to
HTTPServer-like python module, but as I see it's impossible. Solutions
with creating intermediate C-based module is allowed, but better
without them :).
AFAIK, php5ts.dll is that what I must use but how integrate it to
python webserver? that is a question


From sven.siegmund at gmail.com  Mon May 12 13:38:25 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Mon, 12 May 2008 10:38:25 -0700 (PDT)
Subject: Cannot run Python 3.0a5 )-:
Message-ID: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>

Hi, I just tried to install Python 3.0a5 an another Windows PC. I did
what I have done yesterday at home:

1. Downloaded the daily snapshot http://svn.python.org/snapshots/msi/python-3.0.14011.msi
2. Installed to C:\Python30
3. Added C:\Python30 to the Path environment for all users.

when I run python from the command line, it says: The system cannot
execute the specified program.

I don't understand this.

S.


From andrei.zavidei at gmail.com  Fri May  2 10:18:49 2008
From: andrei.zavidei at gmail.com (andrei.zavidei at gmail.com)
Date: Fri, 2 May 2008 07:18:49 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.444.1209712086.12834.python-list@python.org>
Message-ID: <4995d686-881d-4526-9095-3162cbfc4b49@z72g2000hsb.googlegroups.com>

On May 2, 10:07?am, bvidinli <bvidi... at gmail.com> wrote:
> i also asked same question in this list last week.
> i foundhttp://www.cherrypy.org/to be most suitable for me.
> it is basic, easy, pure...
> it contains its own webserver, very easy to start.
>
> others have many framworks, structures, classes many many..
> i wanted a pure web programming system , i found cherrypy.
>
> see you.
>
> 2008/5/2 jmDesktop <needin4mat... at gmail.com>:
>
> > I have been to the main python site, but am still confused. ?I have
> > ?been using .net, so it may be obvious how to do this to everyone
> > ?else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> > ?but I would like to know how to create web pages without these. ?If I
> > ?have mod_python or fastcgi on apache, where do I start? ?I don't have
> > ?clue where to begin to create a web page from scratch in python. ?I am
> > ?sure I will want to access database, etc., all the "normal" stuff, I
> > ?just want to do it myself as opposed to the frameworks, for learning.
>
> > ?Thank you for any help.
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --
> ?.Bahattin Vidinli
> Elk-Elektronik M?h.
> -------------------
> iletisim bilgileri (Tercih sirasina gore):
> skype: bvidinli (sesli gorusme icin,www.skype.com)
> msn: bvidi... at iyibirisi.com
> yahoo: bvidinli
>
> +90.532.7990607
> +90.505.5667711

I agree. Try cherrypy. I was able to write simple issue tracking
system for my project with basic web interface within 2 weeks.
Prior to this I had no web development experience at all. It was
really easy with cherrypy to start.


From lists at cheimes.de  Sat May 17 18:22:13 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sun, 18 May 2008 00:22:13 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net>	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>	<g0nhaf$ee7$1@ger.gmane.org>
	<e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>
Message-ID: <482F5A95.3000209@cheimes.de>

Matthieu Brucher schrieb:
> Even if you compile Python 2.5 with VS2008, VS2003 is used for the
> extensions, AFAIR. I didn't try Python 2.6 because I only have Visual C++
> Express 2008.

You can compile 2.6 and 3.0 with the free Express Edition just fine.

Christian



From deets at nospam.web.de  Tue May 20 10:32:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:32:47 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
	<874p8tawqs.fsf@mulj.homelinux.net>
Message-ID: <69g5pfF2v4102U1@mid.uni-berlin.de>

Hrvoje Niksic wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> bearophileHUGS at lycos.com wrote:
>>
>>> John Salerno:
>>>> What does everyone think about this?
>>> 
>>> The Example 2 builds a list, that is then thrown away. It's just a
>>> waste of memory (and time).
>>
>> No, it doesn't.
> 
> This line:
> 
>     [new.append(c) for c in s if c not in new]
> 
> ...throws away the list built by the comprehension itself, composed of
> None values (returned by append).

Ah. You are right of course.

Diez


From mnikhil at gmail.com  Thu May 22 15:13:04 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 23 May 2008 00:43:04 +0530
Subject: Using MySQLdb to select into the local file
Message-ID: <g14gk0$ntt$1@registered.motzarella.org>

I am using the MySQLdb python module. I have a table named 'testing' 
with few columns, under the 'test' database, what is hosted on a remote 
mysql server.

I want to run the following query to get a comma-seperated information 
from the table


LOCK TABLES foo READ;
SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
   LINES TERMINATED BY '\n'
   FROM 'testing'
UNLOCK TABLES;

..the query is running fine, but what I am noticing is /tmp/result.txt 
is getting created locally on a mysqld running machine but not on the 
client(python program) using the MySQLdb module.
I am wondering if anyone has gone through this before and made some 
arrangements to iterate over the data but get the /tmp/result.txt 
generated locally on the client machine?

On the local or the server file, from 
http://dev.mysql.com/doc/refman/5.0/en/select.html

---
  The SELECT ... INTO OUTFILE statement is intended primarily to let you 
very quickly dump a table to a text file on the server machine. If you 
want to create the resulting file on some client host other than the 
server host, you cannot use SELECT ... INTO OUTFILE. In that case, you 
should instead use a command such as mysql -e "SELECT ..." >  file_name 
to generate the file on the client host.
---

So, what is the equivalent of using '-e' mysql commandline option in the 
MySQLdb python module?

I am sorry if this is supposed to go to only MySQL, but not really sure 
so copying the relevant assumed.

Thanks,
Nikhil


From maxm at mxm.dk  Mon May 26 06:43:03 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 12:43:03 +0200
Subject: b64encode and unicode problem
In-Reply-To: <483A8D9F.3080104@arimaz.com>
References: <483A8D9F.3080104@arimaz.com>
Message-ID: <483A9437.4010505@mxm.dk>

Gabriel Rossetti skrev:
> Hello everyone,
> 
> I am trying to encode a string using b4encode and I get the following 
> error :
> 
>  >>> b64encode(u"Salut Pierre, comment ?a va?")
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>    encoded = binascii.b2a_base64(s)[:-1]
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
> position 22: ordinal not in range(128)
> 
> If I remove the "u" infront of the string, it works. The problem is that 
> I in my program, the string is given to me un unicode/utf-8. I tried 
> several things, but I still get it, How can I get it to work, anybody 
> have any idea?

I have written about it here:

http://mxm-mad-science.blogspot.com/2008/03/python-unicode-lessons-from-school-of.html

The reason/solution for your problem is mentioned somewhere below the 
middle.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From aahz at pythoncraft.com  Sun May 25 16:32:03 2008
From: aahz at pythoncraft.com (Aahz)
Date: 25 May 2008 13:32:03 -0700
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
Message-ID: <g1cic3$3e9$1@panix3.panix.com>

In article <mailman.1539.1211660262.12834.python-list at python.org>,
David  <wizzardx at gmail.com> wrote:
>
>Seriously, 10 hours of testing for code developed in 10 hours? What
>kind of environment do you write code for? This may be practical for
>large companies with hordes of full-time testing & QA staff, but not
>for small companies with just a handful of developers (and where you
>need to borrow somone from their regular job to do non-developer
>testing). In a small company, programmers do the lions share of
>testing. For programmers to spend 2 weeks on a project, and then
>another 2 weeks testing it is not very practical when they have more
>than one project.

You must have poor project management/tracking.  You WILL pay the cost
of testing, the only question is when.  The when does have an impact on
other aspects of the development process.

Speaking as someone who started in my current job four years ago as the
third developer in a five-person company, I believe that your claim about
the differences between small companies and large companies is specious.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From larzluv at hotmail.com  Sun May 11 23:32:16 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 20:32:16 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>

On May 10, 11:41 pm, Larry Hale <larz... at hotmail.com> wrote:
> I've heard tell of a Python binding for libmagic (file(1) *nixy
> command; seehttp://darwinsys.com/file/).  Generally, has anybody
> built this and worked with it under Windows?
>
> The only thing I've been able to find is the python-magic module athttp://hupp.org/adam/hg/python-magic/.
>
>     [1] Is this "THE" python-magic module.  (It seems to be to me, but
> obviously I don't know. :)
>
>     [2] Has anybody been able to build THIS version under Windows?
>
> I've gotten as far as completing the "setup.py install" process.
> (After many troubles; I'll post the top-to-bottom HowTo-like info if/
> when I ever get it to work.  :)
>
> At this point, there -is- a "magic" module that can be imported
> (attempted-to, that is), but it fails.
>
> If I go to a cmd window, run the Py interpreter, and do "import magic"
> I get:
>
>     [1] an error pop-up (Windows window, which is blocking [as opposed
> to "non-blocking", not "obscuring", though it does that, too] the cmd
> window):
>
>         (X) This application has failed to start because magic1.dll
> was not found.  Re-installing the application may fix this problem.
> [OK]
>
>     [2] then, within the interpreter, I get:
>
>         Traceback (most recent call last):
>           File "<stdin>", line 1, in <module>
>           File "build\bdist.win32\egg\magic.py", line 2, in <module>
>           File "build\bdist.win32\egg\cmagic.py", line 7, in <module>
>           File "build\bdist.win32\egg\_cmagic.py", line 7, in <module>
>           File "build\bdist.win32\egg\_cmagic.py", line 6, in
> __bootstrap__
>         ImportError: DLL load failed: The specified module could not
> be found.
>
> I'm using Python 2.5 on Windows XP Pro.  I've got CYGWIN installed
> (more info can be provided if necessary) for a copy of file.exe (and
> libmagic.a @ 357KB and libmagic.dll.a @ 25KB in C:\cygwin\lib).  I
> also have GNUWin32, also for file.exe alternatively (and
> libmagic.dll.a @ ~ 8KB in C:\Program Files\GnuWin32\lib).
>
> magic.py in C:\Program Files\Python25\Lib\site-packages\magic-0.1-
> py2.5-win32.egg imports cmagic.py (also in this egg), which imports
> _cmagic.py, which has the following:
>
>     def __bootstrap__():
>        global __bootstrap__, __loader__, __file__
>        import sys, pkg_resources, imp
>        __file__ =
> pkg_resources.resource_filename(__name__,'_cmagic.pyd')
>        del __bootstrap__, __loader__
>        imp.load_dynamic(__name__,__file__)
>     __bootstrap__()
>
> Now I *presume* my problem (at this point) is that I need to have
> libmagic named as "magic1.dll" -wherever- this module is looking for
> it.  I'm just not sure, let alone if this is true, WHERE Python/
> modules expect to find such things.
>
> Also, which version(s)/file(s) should be placed where, or...??
>
> Thanks for any/all help/pointers.  I apologize up-front if I left out
> any pertinent info; I'm paranoid about putting in too much (and some
> that may be worthless) already...  :)
>
> Cheers,
> Larry Hale

ALSO: I've even tried putting the 4 "magic" files INTO the .egg
file... still no-go.  :/


Thanks, all!
-Larry


From bruno.desthuilliers at gmail.com  Fri May 16 17:38:30 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:38:30 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
Message-ID: <43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>

On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>
>
> > Dan Upton wrote:
> > > for pid in procs_dict:
(snip)
> >    for pid in procs_dict.keys():
>
> I'm afraid this will do the same exact thing. A for loop on a dict
> iterates over the dict keys, so both statements are strictly
> equivalent from a practical POV.

Hem. Forget it. I should think twice before posting - this will
obviously make a big difference here.  Sorry for the noise.



From nick at craig-wood.com  Thu May 22 11:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 10:30:07 -0500
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
Message-ID: <slrng3b383.iqd.nick@irishsea.home.craig-wood.com>

Damon Getsman <dgetsman at amirehab.net> wrote:
> PHP has great support for accessing a MySQL database,

Actually I'd say PHP's mysql support is lacking a very important
feature.  mysql_query() doesn't support parameters (or placeholders,
usually '?')  which means that unless you use
mysql_real_escape_string() on all user input you are leaving yourself
wide open for SQL injection attacks.

With all the other non-PHP mysql programming I've done you use
parameters for all user input and you don't have to worry.

It is not a big deal, but I've had it drummed into me to always use
parameters for user input and I was really suprised PHP didn't have
them.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From castironpi at gmail.com  Tue May 13 10:39:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:39:24 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com> 
	<dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com> 
	<3aacfe8b-f00d-494f-845f-488beeb5b2ef@m44g2000hsc.googlegroups.com>
Message-ID: <864204d0-2c56-4d0c-ae91-719793758086@e39g2000hsf.googlegroups.com>

On May 13, 9:31?am, castiro... at gmail.com wrote:
> On May 13, 9:08?am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
>
> > > Giuseppe Ottaviano wrote:
> > > > def ichain(seq):
> > > > ????????for s in seq:
> > > > ????????????????for x in s: yield x
>
> > > > (which is often useful and I don't think it has been included in ?
> > > > itertools) you can iterate lazily on the file:
>
> > > Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> > > Peter
>
> > Can you color the help manual with very fine shades of off-white to
> > ease reading? ?I was thinking a few pixels shy of red of white to
> > accentuate what are the class methods and which are not. ?I also have
> > an argument that net readability would decrease, but the sample sizes
> > on that kind of metric are a little brinky with privacy fears around
> > where I'm from. ?I just try to make Tron rings.
>
> I am also me the that's the readability of legibles on color of light
> the lighterers.
>
> More simply, that could vary widely though, and I've heard of a
> 'fovea'.- Hide quoted text -
>
> - Show quoted text -

Furthermore "Optical Sensors and Sensing Systems for Natural Resources
and Food Safety and Quality" from wixipedia omits sex.  for Food and
Sex.  I think concepts are related to perceptions.  food.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:19:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:19:45 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <mailman.737.1210231391.12834.python-list@python.org>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>	<mailman.716.1210187999.12834.python-list@python.org>	<40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
Message-ID: <48240921$0$7184$426a74cc@news.free.fr>

Daniel Marcel Eichler a ?crit :
> Am Donnerstag 08 Mai 2008 00:12:26 schrieb 
> bruno.desthuilliers at gmail.com:
> 
>> very often sees do-nothing catch-all try/catch blocks in Java - which
>> is way worse than just letting the exception propagate. I find all
>> this totally pointless, because there's just no way for a compiler to
>> check if your code is logically correct.
> 
> But it's enough if the called method exists and returns the correct 
> type. At least it prevents a crash.

Then providing an appropriate default in the base class is enough too.

>>> Interfaces work at
>>> compile-time, while method-stubs raise at their first call, so in
>>> worst case, never.
>> And then ? If it's never called, why bother implementing it ?
> 
> You never can't say when it's called at least, that's the point. 

Either the method is actually called somewhere and you'll now it pretty 
soon, or it isn't and you don't care.

>>> That's the point. Interfaces garantee that a duck is a duck, an not
>>> only a chicken that quack.
>> Who cares if it's a chicken as long as it quacks when you ask her to
>> ? Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)
> 
> Ducks can also swim and fly.  And if you need a really duck,

If you're code expects something that quacks, swims and flies, anything 
that quacks, swims and flies is ok. You just don't care if it's a duck 
or a flying whale with a quacking device tied to it.

> but have 
> onyl a chicken while the coder was to bored to make one...

Then the coder have a nice traceback, and it's not *your* problem - as 
long as the expectations are clearly documented, it's the user's (ie: 
coder) duty to provide something that fullfil the expectations.

> Of course, in the practical world that all doesn't  matter. But in the 
> theoretical world of the big coding farms, called business, that's one 
> cornerstone of success, in the tinking of managers and so.

Sorry, I live in a very practical world - and we're by no mean running 
out of business here...



From software at ginstrom.com  Sun May 25 11:39:29 2008
From: software at ginstrom.com (Ryan Ginstrom)
Date: Mon, 26 May 2008 00:39:29 +0900
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be><af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com><roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net><69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <00e301c8be7d$857fe500$0203a8c0@MOUSE>

> On Behalf Of Roy Smith
> You could have a bunch of tests of increasing complexity.  
> The first bunch of tests all run in a few seconds and test 
> some basic functionality.  From experience, you also know 
> that these are the tests that are most likely to fail as you 
> port to a new environment.
> 
> There's also some tests which take a long time to run.  If 
> the basic stuff that's being tested by the earlier tests 
> doesn't work, there's no way these tests could pass, but they 
> still take a long time to fail.

How about something like this:

def run_quickies():
    # run the quick, i.e. actual unit tests
    # located in folder ./unit_tests/

def run_long_ones():
    # Run function tests, integration tests, what have you
    # located in folder ./integration_tests/

def whole_shebang():
    run_quickies()
    run_long_ones()

Now you do something like run the unit tests every time a file is saved, and
run the whole shebang nightly and every time a build is performed.

Regards,
Ryan Ginstrom



From castironpi at gmail.com  Thu May 15 19:49:28 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:49:28 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
Message-ID: <24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>

On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
> On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > work:
>
> > > > > > from mutagen.mp3 import MP3
> > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > [snip]
> > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > contents.
>
> > > > cool, so how do i give it the path, if not in the form of a URL
> > > > string? ?maybe this is obvious...
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > It doesn't look like you can, with mutagen. So, time to find a different
> > > library that supports arbitrary file objects instead of only file paths.
> > > I'd suggest starting here:
> > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > Possibly one with actual documentation, since that would also be a step
> > > up from mutagen.
>
> > After a bit of time looking around, looks like nearly all the python id3
> > modules expect to work with filenames, instead of file objects.
>
> > I can't vouch for it, and the documentation still looks sparse, but this
> > module at least looks capable of accepting a file object:
> >http://pypi.python.org/pypi/tagpy
>
> > Looks like it'd be a challenge to build if you're on windows, since it
> > depends on an external library.
>
> > Alternately, you could probably create a subclass of the mutagen stuff
> > that used an existing file object instead of opening a new one. No idea
> > what that might break, but seems like it would be worth a try.
>
> > As last ditch option, could write the first few kb of the file out to a
> > temp file and see if mutagen will load the partial file.
>
> Okay, now I'm officially spending too much time looking through this
> stuff.
>
> However, looks like the "load" method of the MP3 class is what you'd
> want to override to change mutagen's file loading behavior. Probably
> pass the URL as the filename, and take a cut & paste version of the
> default load method from ID3FileType and change it to use urllib2 to
> open it instead of a local file open.
>
> Might work. Might not. No warranty express or implied.
> --
> John Krukoff <jkruk... at ltgc.com>
> Land Title Guarantee Company- Hide quoted text -
>
> - Show quoted text -

I'm supposed to question "time.toomuch.spend".  NAMERS!


From noah at noah.org  Tue May  6 16:21:30 2008
From: noah at noah.org (Noah)
Date: Tue, 6 May 2008 13:21:30 -0700 (PDT)
Subject: How do you debug memory usage?
References: <mailman.652.1210080485.12834.python-list@python.org>
Message-ID: <56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>

On May 6, 6:27 am, David <wizza... at gmail.com> wrote:
> Hi list.
> What is the best way to debug memory usage in a Python script?
> ...
> Are there any tools/modules/etc I can use like this?
> David.

You need to use the debug build of Python to get exact numbers,
but there are a few tricks you can use with the standard build
to detect memory leaks. The simplest thing is to simply watch the
RSS column output of `ps aux` (I'm assuming you are using UNIX).

The other trick I got from Chris Siebenmann
http://utcc.utoronto.ca/~cks/space/blog/python/GetAllObjects
I modified his example a little bit. This does not tell you how
many bytes of memory your running code is using, but it will
show you the number of objects. When looking for memory leaks,
counting the number of objects is sufficient to detect leaks.
For example, say you suspect a function is leaking memory.
You could call it in a loop like this and watch the count of
objects before and after each call.

  while True:
      print "Number objects before:", len(get_all_objects())
      suspect_function()
      print "Number objects after:", len(get_all_objects())

Here is my modified version of Chris' get_all_objects() function.
All I did was force garbage collection using gc.collect().
This makes sure that you are not counting objects that Python has
left in memory, but plans on deleting at some point.

  import gc
  # Recursively expand slist's objects
  # into olist, using seen to track
  # already processed objects.
  def _getr(slist, olist, seen):
      for e in slist:
          if id(e) in seen:
              continue
          seen[id(e)] = None
          olist.append(e)
          tl = gc.get_referents(e)
          if tl:
              _getr(tl, olist, seen)
  # The public function.
  def get_all_objects():
      """Return a list of all live Python objects, not including the
list itself."""
      gc.collect()
      gcl = gc.get_objects()
      olist = []
      seen = {}
      # Just in case:
      seen[id(gcl)] = None
      seen[id(olist)] = None
      seen[id(seen)] = None
      # _getr does the real work.
      _getr(gcl, olist, seen)
      return olist

--
Noah


From http  Wed May  7 03:51:51 2008
From: http (Paul Rubin)
Date: 07 May 2008 00:51:51 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com>
	<15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com>
Message-ID: <7x8wyma6w8.fsf@ruckus.brouhaha.com>

Carl Banks <pavlovevidence at gmail.com> writes:
> Nonsense.  They could be more than willing to contribute their
> patches, but aren't willing to accept the GPL's limitation to being
> used only in open source packages.

Oh, I see what you mean--I'm considering any derived work to be a
patch, which is maybe an overbroad use of that term.  If they are
willing to contribute their patches in that sense, the GPL shouldn't
be a problem.  If they want to just send back small scraps of
improvement while incorporating the GPL'd program into a closed
program, the GPL is doing its job if it prevents that.


From mmanns at gmx.net  Sun May 25 07:43:15 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 25 May 2008 13:43:15 +0200
Subject: Getting a set of lambda functions
Message-ID: <g1bjcj$u3m$1@aioe.org>

Hi,

I try to get a set of lambda functions that allows me executing each
function code exactly once. Therefore, I would like to modify the set
function to compare the func_code properties (or the lambda
functions to use this property for comparison). 

(The reason is that the real function list is quite large (> 1E5), there
are only few functions with non-equal code and the order of execution
is not important.)

How can I achieve this?

>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>>> len(funclist)
4
>>> len(set(funclist))
4
>>> funclist[0].func_code == funclist[3].func_code
True
>>> funclist[0] == funclist[3]          
False


Thanks in advance

Martin


From marlin_rowley at hotmail.com  Sat May 17 17:45:56 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 16:45:56 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482F0090.4030003@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
	<482F0090.4030003@islandtraining.com>
Message-ID: <BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>

Actually in my traversal of the never-ending maze of understanding arrays in python, I stumbled that the data in the wrong sequence.
 
Let's get back to this transpose() deal, say we have these values as integers (representing rgba again): [[[0,1,2,3][4,5,6,7][8,9,10,11][12,13,14,15]] [[16,17,18,19][20,21,22,23][24,25,26,27][28,29,30,31]]] Now if I do this: transpose((2,0,1)), I get this: [[[0,4,8,12] [16,20,24,28]][[1,5,9,13] [17,21,25,29]][[2,6,10,14][18,22,26,30]][[3,7,11,15][19,23,27,31]]] This is NOT what I want.  I want the new array to be: [0,4,8,12][1,5,9,13][2,6,10,14][3,7,11,15][16,20,24,28][17,21,25,29][18,22,26,30][19,23,27,31] How do I do this? -M



> Date: Sat, 17 May 2008 08:58:08 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > > > Very cool.> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > a represents a tile with height of 2 and width of 4 with 4 bits/pixel > > for each color.> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')> > this seperates the stream into individual values - Check> > > > > >>> b.shape=(2,4,4)> >> > This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check> > > > >>> c = b.transpose((2,0,1))> > > > What does the (2,0,1) represent in terms of width and height and > > number of bytes?> > The (2,0,1) tells how to exchange the axes. For instance in a 2D array, > a normal transpose exchanges rows and columns. It will change a (a by > b) sized array into a (b by a) sized array. This would be equivalent to > the more saying interchange axes 0,1 to the new order of 1,0. > > In numpy with higher dimension arrays, the default transpose just > exchanges the first two axes, and the full transpose allows you to > specify exactly the new ordering of the exes. > > So transpose((2,0,1)) means take axes (0,1,2) to the new order > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being > of size (c by a by b) in size. > > In terms of implementation, there may not be *any* data re-arrangement > in a transpose. The only thing that needs changing is how the indices > are converted to an actual machine address of an indexed item. The > documentation notes this by saying transpose returns a "new view" of the > array. This explains why I copied the array before extracting bytes > out of it -- you really do need the elements in the new order for the > next operation.> > Gary Herron> > >> >> >> >> > > > ------------------------------------------------------------------------> >> > > Date: Fri, 16 May 2008 17:08:20 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com; python-list at python.org> > > Subject: Re: numpy.frombuffer != unpack() ??> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > Say I have an array:> > > >> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > >> > > > How do I make it so that I now have:> > > >> > > > starting with first element (a[0])> > > > new_arr[0] = 'r'> > > > new_arr[1] = 'g'> > > > new_arr[2] = 'b'> > > > new_arr[3] = 'a'> > > > new_arr[4] = 'r'> > > > .....> > > >> > > > continuing "through" a[1] with the same new_arr> > > > new_arr[N] = 'r'> > > > new_arr[N+1] = 'g'> > > > ....> > > >> > > > -M> > >> > > Numpy can do this for you. First, do you really mean the array to> > > contain lists of one string each? If so:> > >> > > >>> import numpy> > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a> > > kludge here> > > >>> b> > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',> > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> > > 'b', 'b', 'a', 'a', 'a', 'a'],> > > dtype='|S1')> > > >>> b.shape=(2,4,4)> > > >>> b> > > array([[['r', 'r', 'r', 'r'],> > > ['g', 'g', 'g', 'g'],> > > ['b', 'b', 'b', 'b'],> > > ['a', 'a', 'a', 'a']],> > >> > > [['r', 'r', 'r', 'r'],> > > ['g', 'g', 'g', 'g'],> > > ['b', 'b', 'b', 'b'],> > > ['a', 'a', 'a', 'a']]],> > > dtype='|S1')> > > >>> c = b.transpose((2,0,1))> > > >>> c> > > array([[['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']]],> > > dtype='|S1')> > > >>> d=c.copy() # To make it contiguous> > > >>> d.shape = (32,)> > > >>> d> > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',> > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> > > 'b', 'a', 'r', 'g', 'b', 'a'],> > > dtype='|S1')> > >> > > Done. Cool no?> > >> > > Gary Herron> > >> > > >> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > From: marlin_rowley at hotmail.com> > > > To: robert.kern at gmail.com; python-list at python.org> > > > Subject: RE: numpy.frombuffer != unpack() ??> > > > Date: Fri, 16 May 2008 17:31:30 -0500> > > >> > > > Thank you! That solved it!> > > >> > > > -M> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > > To: python-list at python.org> > > > > From: robert.kern at gmail.com> > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > > Date: Fri, 16 May 2008 17:25:00 -0500> > > > >> > > > > Marlin Rowley wrote:> > > > > > All:> > > > > >> > > > > > I'm getting different floating point values when I use numpy> > > > vs. unpack().> > > > > >> > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > > > buffer = unpack("!f", byte)> > > > > >> > > > > > frgba[0] != buffer[0]> > > > > >> > > > > > why? This is forcing me use the unpack() function since it's> > > > giving me> > > > > > the correct values. What am I doing wrong?> > > > >> > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > > > '>'). Most> > > > > likely, you are on a little-endian platform. All of the dtypes> > > > in numpy default> > > > > to the native-endianness unless specified. If you want to read> > > > big-endian data> > > > > using numpy, do this:> > > > >> > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > > > >> > > > > If you have any more problems with numpy, please join us on the> > > > numpy mailing> > > > > list. When reporting problems, please try to provide a small but> > > > complete> > > > > snippet of self-contained code, the output that you got, and> > > > explain the output> > > > > that you expected to get. Thank you.> > > > >> > > > > http://www.scipy.org/Mailing_Lists> > > > >> > > > > --> > > > > Robert Kern> > > > >> > > > > "I have come to believe that the whole world is an enigma, a> > > > harmless enigma> > > > > that is made terrible by our own mad attempt to interpret it as> > > > though it had> > > > > an underlying truth."> > > > > -- Umberto Eco> > > > >> > > > > --> > > > > http://mail.python.org/mailman/listinfo/python-list> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > E-mail for the greater good. Join the i?m Initiative from> > > > Microsoft.> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > E-mail for the greater good. Join the i?m Initiative from Microsoft.> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Keep your kids safer online with Windows Live Family Safety. Help > > protect your kids. > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From p.wallstedt at gmail.com  Fri May 23 04:52:02 2008
From: p.wallstedt at gmail.com (Peter)
Date: Fri, 23 May 2008 01:52:02 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
Message-ID: <88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>

On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> > I have a small but rather annoying problem withpyserial. I want to
> > open a file on disk for reading and then open a com-port, write lines
> > from the file to the port and then read something back and compare it
> > to the next line in the file. Should be simple. And it is, apart from
> > the fact that the file seems to be doubled ...? Or it loops through
> > the file twice.
>
> > If I exclude the "import serial" it works.
>
> > Any ideas?
>
> Your problem is in line 117 of your program.
>
> --
> Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! Hmmm ... an arrogant
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? bouquet with a subtle
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?suggestion of POLYVINYL
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?CHLORIDE ...

Do you have to much time?


From http  Thu May 29 15:20:09 2008
From: http (Paul Rubin)
Date: 29 May 2008 12:20:09 -0700
Subject: Remote Debugging for python.
References: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>
Message-ID: <7xlk1slxxy.fsf@ruckus.brouhaha.com>

nkarkhan <nkarkhan at gmail.com> writes:
> How do I do that with python?
> I have multi-threaded python programs running on a remote machine. I
> want to se where they are at any instance.

www.winpdb.org


From inhahe at gmail.com  Thu May 22 13:29:37 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:29:37 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <w2iZj.78703$%15.53955@bignews7.bellsouth.net>


"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1476.1211475183.12834.python-list at python.org...
> I've noticed that the value of math.pi -- just entering it at the 
> interactive prompt -- is returned as 3.1415926535897931, whereas (as every 
> pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the 
> end.)

Another way of saying it is: 3.1415926535897932 is of course an 
approximation.  It's the closest approximation to pi given X digits in base 
10.  In base 2 the closest approximation to pi given Y digits is different.




From mde at MicahElliott.com  Tue May  6 09:21:50 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Tue, 06 May 2008 06:21:50 -0700
Subject: os.open and O_EXCL
In-Reply-To: <481A0AD9.8050502@admailinc.com>
References: <481A0AD9.8050502@admailinc.com>
Message-ID: <20080506132150.GC6567@micahelliott.com>

On 2008-05-01 Ethan Furman wrote:

> I am trying to lock a file so no other process can get read nor
> write  access to it.

This looks promising:

    http://pypi.python.org/pypi/lockfile/0.2

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com
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From cfbolz at gmx.de  Sun May  4 11:31:18 2008
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sun, 04 May 2008 17:31:18 +0200
Subject: PyPy Berlin Sprint, 17th - 22nd May 2008
Message-ID: <481DD6C6.4060302@gmx.de>

=====================================================================
         PyPy Berlin Sprint (17-22nd May 2008)
=====================================================================

The next PyPy sprint will be in the crashed `c-base space station`_,
Berlin, Germany, Earth, Solar System.  This is a fully public sprint:
newcomers (from all planets) and topics other than those proposed below
are welcome.

.. _`c-base space station`: http://www.c-base.org/


------------------------------
Goals and topics of the sprint
------------------------------

  - work on PyPy's JIT generator: we are refactoring parts of the
    compiling logic, in ways that may also allow generating better
    machine code for loops (people or aliens with knowledge on
    compilers and SSA, welcome)

  - work on the SPy VM, PyPy's Squeak implementation, particularly the
    graphics capabilities

  - work on PyPy's GameBoy emulator, which also needs graphics support

  - trying some large pure-Python applications or libraries on PyPy and
    fixing the resulting bugs. Possibilities are Zope 3, Django and
    others.

* We are open to all sorts of other tasks during the sprint, just
  propose something.

-----------------------
Location & Accomodation
-----------------------

The sprint will take place in the c-base in Berlin. The address is::

    c-base e.V.
    Rungestrasse 20
    10179 Berlin

To get there, take the U-Bahn or S-Bahn to the station
"Jannowitzbr?cke". See here_ for a map to get to c-base from there.

.. _here:
http://maps.google.com/maps?f=q&hl=en&geocode=&q=c-base+berlin&ie=UTF8&ll=52.515464,13.408985&spn=0.020449,0.057335&z=15&iwloc=A

If you want to come, please register via by svn:

  http://codespeak.net/svn/pypy/extradoc/sprintinfo/berlin-2008/people.txt

or write a mail to the pypy-sprint mailing list if you do not yet have
check-in rights:

  http://codespeak.net/mailman/listinfo/pypy-sprint

Of course, especially given the location, it's ok to show up even if you
didn't register.  (The c-base has probably got the plans of Guido's
famous time machine anyway, so you can register last week.)


-----------
Exact times
-----------

The sprint will be from 17th to 22nd of May 2008. We will start
sprinting every day at 10. An introduction will be given on the first
day, if there is interest.
_______________________________________________
pypy-sprint mailing list
pypy-sprint at codespeak.net
http://codespeak.net/mailman/listinfo/pypy-sprint



From scott.hafeman at rogers.com  Thu May 22 15:53:54 2008
From: scott.hafeman at rogers.com (scott.hafeman at rogers.com)
Date: Thu, 22 May 2008 12:53:54 -0700 (PDT)
Subject: Shell-independent *nix setup script
Message-ID: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>

Hi,
Is it worthwhile maintaining a production application setup script in
Python as opposed to shell-script?  The main goal of this setup script
is to sniff a user's environment and export environment variables to
the calling (parent) process.
Either way, some file would need to be sourced into the user's
environment, so why not use a richer language where the setup logic is
independent of the user's shell being used.

Thanks for your feedback,
Scott


From larzluv at hotmail.com  Sun May 11 22:08:37 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 19:08:37 -0700 (PDT)
Subject: Saving an audio file's waveform into an image
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <4c79af19-d75d-41af-95c6-777f99af6593@m3g2000hsc.googlegroups.com>

On May 9, 1:55 am, Julien <jpha... at gmail.com> wrote:
> Hi,
>
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?
>
> I heard about the Snack module, but the project looks dead and un-
> maintained.
>
> Your advice would be greatly appreciated.
>
> Thanks!
>
> Julien


Would you please provide more info on what you're wanting to
accomplish?

As for "Snack module", all I could find was http://www.wanware.com/tsgdocs/snack.html,
which seems "dead", although the Google cached version at
http://64.233.167.104/search?q=cache:gNGrrPqY5RsJ:www.wanware.com/tsgdocs/snack.html+python+snack+module&hl=en&ct=clnk&cd=1&gl=us
makes it sound rather UNlike what you're talking about.  (Other ref's
for my Google search of http://www.google.com/search?hl=en&q=python+snack+module&btnG=Google+Search
seemed to show the same thing.)


The short answer is: Huh?/What?/Why?  Why not put the picture + sound
==> video file.  (Sure the image remains static, but there's the
Soundtrack with it!  ;) )


Cheers,
-Larry Hale


From amit.uttam at gmail.com  Fri May 16 20:12:42 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:12:42 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
	<6330d8bf-f164-4ae6-8bfb-76c742a72ad2@2g2000hsn.googlegroups.com>
Message-ID: <63a95035-0175-42bb-adc4-264b58785bb8@n1g2000prb.googlegroups.com>

On May 16, 4:03 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 16, 6:38 pm, amit.ut... at gmail.com wrote:
>
>
>
> > Hey there,
>
> > I have a simple question about python print statement. Take the
> > following code snippet for example...
>
> > 1 print "-#- executing: %s" % section,
> > 2 tests[section] = test.testcase(name=config.get(section,'name'))
> > 3 tests[section].runTest()
> > 4 printStatus(tests[section])
>
> > Now the problem is that line 1 does not get printed until line 4. What
> > I thought would happen is that line 1 gets executed and the user sees
> > that the statement that the test case is executing. Then after the
> > test case executes a "PASS" or "FAIL" appears on the same line as the
> > "-#- executing: 0053" statement.
>
> > e.g.
> > -#- executing: 0053     FAIL
>
> > Some tests take a long time to finish thus the screen is blank until
> > the entire test finishes and the above statement is outputted.
>
> Your standard output uses line-buffering, which means that the
> underlying I/O code stores all the output in memory until it gets a
> newline, only then does it send the output to the terminal (or
> console, or whatever).
>
> Workarounds to this are as follows:
>
> 1. Explicity flush the buffer after any print statements that end with
> a comma:
>
> print "whatever",
> sys.stdout.flush()
>
> 2. Run Python in unbuffered mode, by using the -u switch:
>
> python -u yourscript.py
>
> Carl Banks

Thanks for the reply. This worked as expected. I did not know about
the -u switch, this is good stuff.

Amit


From skanemupp at yahoo.se  Tue May 13 12:49:33 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 09:49:33 -0700 (PDT)
Subject: Fill memeory with endless loop?
Message-ID: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>

if i do something like
while 1:
    print "x"

will the program ever stop because it runs out of memory? or is the
print x never stored somewhere?
if u do soemhting like add element to a list it has an upper nbr of
elements right? if though huge...
does windows or any other OS have some proces that would stop
something like this after a while? could be interpreted a s a virus
perhaps?



From twoelz at gmail.com  Wed May  7 08:42:50 2008
From: twoelz at gmail.com (Thomas Woelz)
Date: Wed, 7 May 2008 05:42:50 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <a5fda5c5-6389-4d05-b9e0-39a303cadbb3@e53g2000hsa.googlegroups.com>

On 7 maio, 09:25, swap... at gmail.com wrote:
> Any idea why the following program does not work? I was learning IO on
> Python and the following generates a TypeError: range() integer end
> argument expected, got str.
> I am a beginner.
>
> ################################
> # print input name (str k), j times using raw_input
>
> def hello():
>     j=raw_input("Please type in the number of times you want to print
> ")
>     k=raw_input("Please type in your name ")

    # add this:
    j = int(j)

>     printname(j,k)
>
> def printname(j,k):
>           for i in range(j):
>                 print ("Hello %s" % k)
> ################################

theres too much whitespace in the printname function, try to stick
with 4 spaces (and no tabs) for each block


From python at bdurham.com  Wed May  7 10:44:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 10:44:47 -0400
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <fvs2rj$cru$1@aioe.org>
References: <fvs2rj$cru$1@aioe.org>
Message-ID: <1210171487.15211.1251897623@webmail.messagingengine.com>

Pistacchio,

Templite
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496702

A light-weight (~40 lines), fully functional, general purpose templating
engine, allowing you to embed python code directly into your text. This
engine is suitable for any templating (not only HTML/XML), and is
minimal (40 lines of code!) and fast (all preprocessing is done in
"compile time")

Quote: "Very nice. That's just the right amount of markup for embedding
Python into html documents."

Malcolm


From robert.kern at gmail.com  Sat May 17 18:33:37 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 17 May 2008 17:33:37 -0500
Subject: how to use the transpose function in numpy?
In-Reply-To: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>
References: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>
Message-ID: <g0nmg1$ufp$1@ger.gmane.org>

Ask numpy questions on the numpy mailing list:

   http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From m.shanmugarajan at gmail.com  Thu May 22 06:29:41 2008
From: m.shanmugarajan at gmail.com (Shan)
Date: Thu, 22 May 2008 03:29:41 -0700 (PDT)
Subject: wsdl2py throwing error while creating client side code
Message-ID: <edd91cd3-789e-447f-ac92-03bf83d228ad@z16g2000prn.googlegroups.com>

I am developing an application using web services in python (ZSI
Zolera Sopa Infrastructure)
I am  trying to create client side code of the wsdl file in the web
service using wsdl2py. But i ended with an error from wsdl2py

Here is the code


[user1 at localhost wsdl]$  wsdl2py -b -f vimService.wsdl
Traceback (most recent call last):
  File "/usr/bin/wsdl2py", line 5, in ?
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 2561, in ?
    working_set.require(__requires__)
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 626, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 524, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: ZSI==2.0


What may be the problem...? If any one can help me with this then it
will be very useful.

Thanks and Regards,
Shan


From george.sakkis at gmail.com  Thu May  1 11:11:25 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 08:11:25 -0700 (PDT)
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl> 
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org> 
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org> 
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de> 
	<74c070ce-1b8f-4746-9d1c-ac2227aaf515@y21g2000hsf.googlegroups.com> 
	<Xns9A9156C608E88duncanbooth@127.0.0.1>
Message-ID: <1f4ea5fe-9d39-4c2b-b443-bd908adc2ba0@t54g2000hsg.googlegroups.com>

On May 1, 3:36 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:

> George Sakkis <george.sak... at gmail.com> wrote:
> > On Apr 30, 5:06 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> > wrote:
> >> Hall?chen!
>
> >> SL writes:
> >> > "Gabriel Genellina" <gagsl-... at yahoo.com.ar> schreef in bericht
> >> >news:mailman.365.1209541507.12834.python-list at python.org...
>
> >> >> En Wed, 30 Apr 2008 04:19:22 -0300, SL <n... at hao.com> escribi?:
> And
> >> >> that's a very reasonable place to search; I think chr and ord are
> >> >> builtin functions (and not str methods) just by an historical
> >> >> accident. (Or is there any other reason? what's wrong with
> >> >> "a".ord() or str.from_ordinal(65))?
>
> >> > yes when you know other OO languages you expect this. Anyone know
> >> > why builtins were chosen? Just curious
>
> >> *Maybe* for aesthetical reasons.  I find ord(c) more pleasent for
> >> the eye.  YMMV.
>
> >> The biggest ugliness though is ",".join().  No idea why this should
> >> be better than join(list, separator=" ").
>
> > Seconded. While we're at it, a third optional 'encode=str' argument
> > should be added, to the effect of:
>
> > def join(iterable, sep=' ', encode=str):
> >     return sep.join(encode(x) for x in iterable)
>
> > I can't count the times I've been bitten by TypeErrors raised on
> > ','.join(s) if s contains non-string objects; having to do
> > ','.join(map(str,s)) or ','.join(str(x) for x in s) gets old fast.
> > "Explicit is better than implicit" unless there is an obvious default.
>
> I'm afraid I don't agree with you on this. Most places where I use join
> I already know the type of the values being joined. In those few cases
> where I want to join non strings, or want to do some other processing on
> the values the generator comprehension is easy and has the advantage
> that I can use a more complex expression than a simple function call
> without having to wrap it in a lambda or otherwise contort things:
>
> e.g. comma.join(x[1] for x in s)
> vs.  comma.join(s, encode=operator.itemgetter(1))
> or   comma.join(s, encode=lambda x: x[1])

You don't have to use encode; you can write it as
join((x[1] for x in s), comma)

The main benefit of encode is its obvious default (=str), otherwise
it's not strictly necessary (although it is handy for named functions
e.g. encode=repr).

> Plus of course, you aren't going to be writing ','.join(str(x) for x in
> s) more than once in any given program before you extract it out to a
> function, are you?

In fact I am, not every one-liner needs to be a function. Just the
fact that such a function would live in a general utils module that I
have to import in most of my other modules (effectively making it a
two-liner) is not worth the few extra keystrokes.

George


From deets at nospam.web.de  Wed May 14 18:41:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 15 May 2008 00:41:00 +0200
Subject: Using file objects with elementtree
In-Reply-To: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
Message-ID: <69184aF2tsmnaU1@mid.uni-berlin.de>

dj schrieb:
> Hello,
> 
> Rather then holding my XML document in memory before writing it to
> disk, I want to create a file object that elementtree will write each
> element to has it is created. Does any one know how to do that ?
> 
> Here is my code so, far:
> 
> fd = open("page.xml", "w")
> tree.write( fd, encoding="iso-8859-1")
> 
> I know there's something I am doing wrong, but I just do not know
> what.

This isn't possible. How should ET handle the case that you add a 
child-node to a node that has been rendered already?

What you could try is to serialize subtrees that are closed to a stream.


Diez


From saluk64007 at gmail.com  Mon May 26 14:50:58 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 11:50:58 -0700
Subject: definition of a highlevel language?
In-Reply-To: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>

It basically works like this:

low level to high level

machine code
assembly -> translates to machine code
c -> compiles to assembly and machine code
python -> commands interpreted by a vm running on c

So python is "higher level" because it is built on top of lower level
languages.  If python were to compile to assembly/machine code (cython or
rpython perhaps) than it would be at the same level as c rather than higher
level.

At least this is my understanding of it.  PyPy at the moment is much higher
level than python, because it is built on top of python.

The higher the level of abstraction, the more flexible and portable a
language can be, in general.  Also, since it is built on more and more
things, time is spent translating down the stack, so higher level languages
tend to be slower as well.

However something like python is a bit tricky, because when you are using
extensions written in C, it sort of translates down skipping a step and acts
more on the c level.  The high-level/low-level waters are very muddy these
days.
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From salgerman at gmail.com  Tue May 13 21:53:47 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 18:53:47 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<a298d$4829d22b$4275d90a$12993@FUSE.NET>
Message-ID: <6a7f02ad-9c72-4626-add8-9bf31075f1ca@34g2000hsh.googlegroups.com>

On May 13, 1:59 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> gsal wrote:
> > There does not seem to be a valid url for the Installer, anywhere.
> > Could anyone provide me with a copy of it?
>
> > many thanks.
>
> http://pyinstaller.python-hosting.com/
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

Thanks, Kevin


From Ludwig at armand-miniatur.de  Wed May 21 01:34:21 2008
From: Ludwig at armand-miniatur.de (Ludwig Miniatur)
Date: Tue, 20 May 2008 22:34:21 -0700 (PDT)
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
	<a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com> 
	<mailman.1403.1211321574.12834.python-list@python.org>
Message-ID: <cbe7e8d3-12cf-43c4-9b07-d4fd03718d25@s50g2000hsb.googlegroups.com>

On 21 Mai, 00:12, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Tue, 20 May 2008 16:22:10 -0300, Joe P. Cool
> <joe.p.c... at googlemail.com> escribi?:
>
>
>
> > Ludwig Miniatur wrote:
> >> For example:
> >> #!/usr/bin/env python
>
> >> from parser import suite, ast2list
> >> fh = file(__file__)
> >> s = fh.read()
> >> fh.close()
> >> ast = suite(s)
>
> >> while False:
> >>   print "hello world"
> >> # comment
>
> >> Looks like a little bug in parser; but what I don't understand is that
> >> I thought parser was build with the current syntax of python.
>
> > I didn't read the grammar but I assume that Python grammar requires a
> > comment to have the form #.*<end-of-line>.
>
> >> So, why can python run the script (an it can if you comment out the
> >> line "ast = suite(s)") but parser can't?
>
> > The interpreter probably appends a newline after the input stream as a
> > friendly service :)
>
> Something like that. The last line of source *must* end in a newline (be
> it a comment or not); this is a known limitation. See py_compile.py for an
> example.
>
> --
> Gabriel Genellina

Uoh, you never stop learning...
Thanks for the explanation. I thought something like that, but it made
me some headaches.

Lutz


From castironpi at gmail.com  Tue May 13 10:31:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:31:24 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com> 
	<dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com>
Message-ID: <3aacfe8b-f00d-494f-845f-488beeb5b2ef@m44g2000hsc.googlegroups.com>

On May 13, 9:08?am, castiro... at gmail.com wrote:
> On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
>
> > Giuseppe Ottaviano wrote:
> > > def ichain(seq):
> > > ????????for s in seq:
> > > ????????????????for x in s: yield x
>
> > > (which is often useful and I don't think it has been included in ?
> > > itertools) you can iterate lazily on the file:
>
> > Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> > Peter
>
> Can you color the help manual with very fine shades of off-white to
> ease reading? ?I was thinking a few pixels shy of red of white to
> accentuate what are the class methods and which are not. ?I also have
> an argument that net readability would decrease, but the sample sizes
> on that kind of metric are a little brinky with privacy fears around
> where I'm from. ?I just try to make Tron rings.

I am also me the that's the readability of legibles on color of light
the lighterers.

More simply, that could vary widely though, and I've heard of a
'fovea'.


From mensanator at aol.com  Thu May 29 12:26:24 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 29 May 2008 09:26:24 -0700 (PDT)
Subject: bit parsing from file
References: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>
Message-ID: <a8f14114-f3e9-4848-8737-6736a46da122@r66g2000hsg.googlegroups.com>

On May 29, 9:42?am, "rewo... at gmail.com" <rewo... at gmail.com> wrote:
> Hello,
>
> I'm tring to make a cutting script.
> The problem is the following, i have a sample pattern, for
> example :'11101110' (0xEE)
> That is the sign of the data begining.
> How can i cut a file if the byte stepping is not the same, for
> example:
>
> file=open('test.bin','rb')
> data=file.read()
> print binascii.hexlify(data) ? ? ? ? ? ?# BB9A (1011101110011010)
> file.close()
>
> so i need to cut the first two bit and start to writeout the bit
> stream to another file
> If somebody have an idea to do this, please share with me.
> Thanx

Cutting off the leading two bits isn't a problem,
but once you write out the byte 11101110  you are
left with 011010 which cannot be written as it's not
a byte. How do you plan to handle that? Add two bits
at the MSB (00011010) or two bits at the LSB (01101000)
or discard the fractional byte?

And do you always know what the bit offset is or
do you have to search for the 11101110 starting
pattern?

>
> Rew



From benjamin.kaplan at case.edu  Sat May 24 08:21:27 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sat, 24 May 2008 08:21:27 -0400
Subject: Reloading function obtained via 'from xxx import yyy'
In-Reply-To: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <ec96e1390805240521k6d834b21n9875369e45e5e3@mail.gmail.com>

On Fri, May 23, 2008 at 3:40 PM, Joel Koltner <zapwireDASHgroups at yahoo.com>
wrote:

> How do I get Python to correctly re-load this function definition?
>
> In test.py:
>
> def testFunc():
>    print 'My testFunc!'
>
> I execute...
>
> >>> from test import testFunc
> >>> testFunc()
> My testFunc!
>
> Fine... now I change test.py to:
>
> def testFunc():
>    print 'Modified testFunc!'
>
> ...and I'd like to reload testFunc.  How do I do so?  'from test import
> testFunc' keeps the old definition around, and 'reload test' of course
> doesn't
> work becayse I didn't use 'import test' in the first place.
>

"Namespaces are one honking great idea -- let's do more of those!"

If you don't want to have to type out the full name every time just do
"import test as t". That makes it only 2 extra characters to type. If you
don't put everything in the same namespace, you don't have to worry about
clashing.

>
> Thanks for the help,
> ---Joel
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From alex.m.gusarov at gmail.com  Tue May 27 03:31:35 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 00:31:35 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>

Hello, I have strong .NET background with C# and want to do some
familiar things from it with Python, but don't know how. For example,
I created form in qt designer with QCalendarWidget, translated it into
Python module and want to overload virtual method paintCell of
QCalendarWidget. In C# I can write following (abstract) code:

this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);

void myPaintCellHandler(object sender, PaintEventArgs e) {
    // some work here
}

I can't find how I can do similar thing in Python without inheriting
QCalendarWidget and overloading this method in inherited class (it's
long and I must create additional class). The only thing I done its
full replacement of handler:

calendar.paintCell = myPaintCell

def myPaintCell(self):
    pass

Operator += don't work with methods. So, I can't add handler or call
standart handler from my (infinite recursion, cause my handler
replaced standart)

Please, give me some advice, I know Python must be good enough to do
such things fast and elegant.

--
Best regards, Alex Gusarov


From skunkwerk at gmail.com  Mon May 12 15:31:49 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:31:49 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com>
Message-ID: <5bb546cd-1175-434c-9843-70f2ff691f15@c19g2000prf.googlegroups.com>

On May 12, 1:40 am, Rhamphoryncus <rha... at gmail.com> wrote:
> On May 11, 10:16 am,skunkwerk<skunkw... at gmail.com> wrote:
>
>
>
> > On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > > declaimed the following in comp.lang.python:
>
> > >         Coming in late...
>
> > > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > > >skunkwerkwrote:
> > > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > > new requests are inserted, like so:
>
> > >         <snip>
>
> > > > > > queue = Queue.Queue(0)
> > > > > >  WORKERS=100
> > > > > > for i in range(WORKERS):
> > > > > >    thread = SDBThread(queue)
> > > > > >    thread.setDaemon(True)
> > > > > >    thread.start()
>
> > > > > > the thread:
>
> > > > > > class SimpleDBThread ( threading.Thread ):
> > > > > >    def __init__ ( self, queue ):
> > > > > >            self.__queue = queue
>
> > >         Note: double-leading __ means "name mangling" -- typically only
> > > needed when doing multiple layers of inheritance where different parents
> > > have similar named items that need to be kept independent; a single _ is
> > > the convention for "don't touch me unless you know what you are doing"
>
> > > > > >            threading.Thread.__init__ ( self )
> > > > > >    def run ( self ):
> > > > > >            while 1:
> > > > > >                    item = self.__queue.get()
> > > > > >                    if item!=None:
> > > > > >                            model = domain.get_item(item[0])
> > > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > > >                            title = model['title']
> > > > > >                            scraped = model['scraped']
> > > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > > any suggestions?
> > > > > > thanks
>
> > >         <snip>
>
> > > > thanks John, Gabriel,
> > > >   here's the 'put' side of the requests:
>
> > > > def prepSDBSearch(results):
> > > >    modelList = [0]
> > > >    counter=1
> > > >    for result in results:
> > > >            data = [result.item, counter, modelList]
> > > >            queue.put(data)
> > > >            counter+=1
> > > >    while modelList[0] < len(results):
> > > >            print 'waiting...'#wait for them to come home
> > > >    modelList.pop(0)#now remove '0'
> > > >    return modelList
>
> > >         My suggestion, if you really want diagnostic help -- follow the
> > > common recommendation of posting the minimal /runable (if erroneous)/
> > > code... If "domain.get_item()" is some sort of RDBM access, you might
> > > fake it using a pre-loaded dictionary -- anything that allows it to
> > > return something when given the key value.
>
> > > > responses to your follow ups:
> > > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > > list in the above function.  it's not global, and the initial values
> > > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > > passes in the same memory address or declares a new 'data' list (which
> > > > I guess is what I want)
>
> > >         Rather confusing usage... In your "put" you have a list whose first
> > > element is "result.item", but then in the work thread, you refer to the
> > > entire list as "item"
>
> > > > 3)  the first item in the modelList is a counter that keeps track of
> > > > the number ofthreadsfor this call that have completed - is there any
> > > > better way of doing this?
>
> > >         Where? None of your posted code shows either "counter" or modelList
> > > being used by thethreads.
>
> > >         And yes, if you havethreadstrying to update a shared mutable, you
> > > have a race condition.
>
> > >         You also have a problem if you are using "counter" to define where
> > > in modelList a thread is supposed to store its results -- as you can not
> > > access an element that doesn't already exist...
>
> > > a = [0]
> > > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> > >         Now, if position is irrelevant, and a thread just appends its
> > > results to modelList, then you don't need some counter, all you need is
> > > to check the length of modelList against the count expected.
>
> > >         Overall -- even though you are passing things via the queue, the
> > > contents being pass via the queue are being treated as if they were
> > > global entities (you could make modelList a global, remove it from the
> > > queue entries, and have the same net access)...
>
> > >         IOWs, you have too much coupling between thethreadsand the feed
> > > routine...
>
> > >         As for me... I'd be using a second queue for return values...
>
> > > WORKERTHREADS = 100
> > > feed = Queue.Queue()
> > > result = Queue.Queue()
>
> > > def worker():
> > >         while True:
> > >                 (ID, item) = feed.get()                 #I leave the queues globals
> > >                                                                                 #since they perform locking
> > >                                                                                 #internally
> > >                 model = domain.get_item(item)
> > >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > > for i in range(WORKERTHREADS):
> > >         aThread = threading.Thread(target=worker)
> > >                 #overkill to subclass as there is now no specialized init
> > >                 #and if I really wanted to make the queues non-global
> > >                 #I'd pass them as arguments:
> > >                 #       threading.Thread(target=worker, args=(feed, results))
> > >                 #where worker is now
> > >                 #       def worker(feed, results):
> > >         aThread.setDaemon(True)
> > >         aThread.start()
>
> > > ...
>
> > > def prepSearch(searches):
> > >         modelList = []
> > >         counter = 0
> > >         for searchItem in searches:
> > >                 feed.put( (counter, searchItem) )
> > >                 counter += 1
> > >                 modelList.append(None)  #extend list one element per search
> > >         while counter:
> > >                 (ID, title, scraped) = results.get()
> > >                 modelList[ID] = (title, scraped)
> > >                 counter -= 1
> > >         return modelList
>
> > >         The only place counter and modelList are modified are within the
> > > prepSearch. I'm passing counter out and back to use as an ID value if
> > > the final results are supposed to be in order -- that way if one thread
> > > finishes before another, the items can be placed into the list where
> > > they'd have been sequentially.
>
> > >         I can only hope that "domain.get_item" is an activity that is I/O
> > > bound AND that it supports parallel accesses... Otherwise the above
> > > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > > threading swaps for what is otherwise a rather linear process.
>
> > >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > > mainthreadsthat are posting to the worker feed queue (and you were
> > > using separate mutables for storing the results). In this situation, I'd
> > > remove the results queue from being a global entity, create one queue
> > > per main processing thread, and pass the queue as one of the parameters.
> > > This way, a worker can return data to any source thread by using the
> > > supplied queue for the return...
>
> > > Modify prepSearch with:
>
> > >         myQueue = Queue.Queue()
> > > ...
> > >         feed.put( (counter, searchItem, myQueue) )
> > > ...
> > >         (ID, title, scraped) = myQueue.get()
>
> > > Modify worker with:
>
> > >         (ID, item, retqueue) = feed.get()
> > > ...
> > >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> > wow.  thanks for the help.
> >    i seem to have fixed my problem though - it turns out
> > domain.get_item was not thread safe as it was using the underlying
> > httplib.  the solution was to create a new connection to the database
> > for each thread (which is ok as the database is meant to be queried in
> > a massively paralell fashion).  the missing part of the code included
> > a part where i inserted the results at the given position into the
> > list.
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?  It wouldn't help having a .pyc or using
> > psycho, correct, as the time is being spent in the runtime?  something
> > along the lines of 'start a new thread every minute until you get to a
> > 100' without blocking the execution of the rest of the code in that
> > file?  or maybe any time i need to do a search, start a new thread if
> > the #threads is <100?
>
> $ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
> t.start(); t.join()'
> 10000 loops, best of 3: 131 usec per loop
>
> Clearly it is not the threads themselves, but something else which is
> expensive.
>
> It's not clear why you need threads at all.  Unless you've got a lot
> of cpus/cores running that DBMS, or it's got fairly high latency (and
> no way to pipeline), attacking it with more threads isn't gonna give
> significant speedups.

correct.  the threads themselves are not taking up the time, but the
initialization of each thread (which includes making a new connection
to the database) - typically this is ~3 seconds.  The database is
amazon's simpleDB, which is meant to support massively parallel
queries.  once the connection has been made, queries are very fast.

thanks


From robert.kern at gmail.com  Thu May 22 16:00:28 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 22 May 2008 15:00:28 -0500
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <4835A9D5.9060607@admailinc.com>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>	<48340df7$1@news.mel.dft.com.au>
	<4835A9D5.9060607@admailinc.com>
Message-ID: <g14jcs$2i3$1@ger.gmane.org>

Ethan Furman wrote:

> Next question:  when using struct.pack to store an integer, I get a 
> deprecation warning if the int is too big... I would rather have an 
> error.  Is there a setting somewhere that controls this?

http://docs.python.org/dev/library/warnings

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From bignose+hates-spam at benfinney.id.au  Thu May  8 19:34:38 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 May 2008 09:34:38 +1000
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <87lk2k9xpt.fsf@benfinney.id.au>

wxPythoner at gmail.com writes:

> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.

As explicitly defined in the language reference, the "negative"
operator has lower binding precedence than the "power" operator
<URL:http://www.python.org/doc/ref/summary.html>.

> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0.

It does, if you actually have a negative number that you're raising to
power 0.

    >>> (-123)**0
    1

> This is a rare case when the parser is fooled

The parser is operating according to the documented language
specification. It can't account for the user being fooled by external
sources.

-- 
 \     "You know what I hate? Indian givers... no, I take that back."  |
  `\                                                    -- Emo Philips |
_o__)                                                                  |
Ben Finney


From notnorwegian at yahoo.se  Sun May 25 15:58:47 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 12:58:47 -0700 (PDT)
Subject: 22.800000 and a 1 on the end!!??
Message-ID: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>

>>> x = 5
>>> x /= 2
>>> x
2
>>> x *=11.4
>>> x
22.800000000000001

ok where does the 1 in the come from?


From arnodel at googlemail.com  Tue May 20 02:03:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 07:03:58 +0100
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
	<mailman.1365.1211238151.12834.python-list@python.org>
Message-ID: <m2fxsd8qb5.fsf@googlemail.com>

John McMonagle <jmcmonagle at velseis.com.au> writes:

> notnorwegian at yahoo.se wrote:
>> ' '.join([`x  x` for x in range(1, 6)])
>> 
>> anyone can tell me what im doing wrong?
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>> 
>
>
> ' '.join(['%s %s' % (str(x), str(x)) for x in range(1,6)])
>
> or
>
> ' '.join([str(x)+' '+str(x) for x in range(1,6)])
>
>
> outputs....
>
> '1 1 2 2 3 3 4 4 5 5'
>
>
> Is that what you were after ?

Or:

' '.join(str(i//2) for i in xrange(2, 13))

?

-- 
Arnaud


From goldnery at gmail.com  Sat May 10 08:27:13 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 05:27:13 -0700 (PDT)
Subject: Simple question
Message-ID: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>

I use to write code with PHP.

To ran script width PHP I need to open new file inside my WWW
directory and name it somethin.php and then to write my script inside
<?php    ?>  tags

how can i ran script with python


thenks


From pistacchio at gmail.com  Wed May  7 10:17:19 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 16:17:19 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
Message-ID: <fvsdlh$8l3$1@aioe.org>

George Sakkis ha scritto:
> On May 7, 9:40 am, pistacchio <pistacc... at gmail.com> wrote:
> 
>> Diez B. Roggisch ha scritto:
>>
>>
>>
>>> pistacchio wrote:
>>>> Mike Driscoll ha scritto:
>>>>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>>>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>>>>> my server side needs but i can't seem to find what i'm looking for. for
>>>>>> most of my php work i use mysql and tinyButStrong
>>>>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>>>>> engine that offers powerful functionalities. you insert TBS tags in web
>>>>>> pages like:
>>>>>> <div align="center" class="title-page"> [var.x] </div>
>>>>>> and it replaces [var.x] with the value of global variable x. it also
>>>>>> makes blocks (and nested blocks) easy to implement:
>>>>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>>>>> [blk1;block=end] </p>
>>>>>> in the previous code it cycles throu all the values of the array blk1.
>>>>>> it does many more things, like htlm escaping, url and js encoding etc,
>>>>>> conditional displaying etc, but it is not more confusing that inserting
>>>>>> pieces of code into the HTML (aka: littering the code and kissing
>>>>>> goodbye to the code/presentation separation). it comes in the form of a
>>>>>> single file with a single class that you can easily include in the code
>>>>>> and go.
>>>>>> now, i've searched the net and it seems full of python-based frameworks
>>>>>> for doing server side scripting and templating, but none that suits my
>>>>>> needs.
>>>>>>     1. i like writing code and i like control. i mean, open up the
>>>>>> simplest text editor and write in it. i don't want something that is
>>>>>> command-line driven or that writes code for me like ">>>
>>>>>> makePagesFromThisDatabase()".
>>>>>>     2. i want something very lightweight. i don't want dozen of options,
>>>>>> pre-made blogging parts ecc. i just need a good non invasive template
>>>>>> engine and the basic functions for server side scripting, like session
>>>>>> managing, request parsing, functions to manipulate html code (encodings
>>>>>> etc)
>>>>>>     3. i don't want to beg my hosting provider to install the libraries.
>>>>>> a simple include file should do the work.
>>>>>>     4. object oriented programming is not required (better: i prefer
>>>>>> plain old procedural programming).
>>>>>> any help? thanks in advance
>>>> hi, thanks for replaying
>>>>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>>>>> and Genshi in 2.x (I think) for templating purposes. There's also
>>>>> Cheetah, one of the more powerful Python templating engines out there.
>>>> django is exacly the kind of giant i'm trying to avoid
>>>>> http://genshi.edgewall.org/
>>>> the first lines of the tutorial read:
>>>> "First, make sure you have CherryPy 3.0.x installed"
>>>> Now, cherrypy is something that is not properly "include a file and get
>>>> going!"
>>>>> http://www.kid-templating.org/
>>>> kid seems to have a non-linear approach, but i may give it a try
>>>>> http://www.cheetahtemplate.org/
>>>> cheetah was something that i already considered using. have i to
>>>> "install" it or can i just import it?
>>> You will need to install any of these. It is part of how python is designed.
>>> Extendability comes with a price-tag.
>> well, the problema is exacly that i'm looking for a python module, not
>> for a python library.
> 
> What does it matter if it's a single file or a dozen under a package ?
> "Installation" for pure Python packages can be as simple as copying
> the package under any directory in your PYTHONPATH.
> 

well, it doesn't matter if it's a single file or a package, but it 
_does_ matter if you have to put them under the path where python is 
installed because, in a typical shared web hosting environment (such the 
one that i use) you don't have access to system directories.

> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
> and fast.

woudl you suggest mako over cheetah?

> 
> George


From nagle at animats.com  Wed May 14 01:37:24 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 13 May 2008 22:37:24 -0700
Subject: BeautifulSoup/sgmllib crash
In-Reply-To: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <482a776c$0$34554$742ec2ed@news.sonic.net>

    Here's another example of the annoying "attributes must be ASCII
but sgmllib doesn't check" problem.

Run "http://www.serversdirect.com" through BeautifulSoup, and watch it
blow up at this bogus HTML:

      <LI>Support Multi-Core Intel? Xeon? processor 3200/3000 sequence 
</LISUPPORT sequence 32003000 processor xeon? intel? multi-core>

The parser uses the ? symbol as part of an attribute name:

SGMLParser.feed(self, markup or "")
File "/usr/local/lib/python2.5/sgmllib.py", line 99, in feed
self.goahead(0)
File "/usr/local/lib/python2.5/sgmllib.py", line 138, in goahead
k = self.parse_endtag(i)
File "/usr/local/lib/python2.5/sgmllib.py", line 315, in parse_endtag
self.finish_endtag(tag)
File "/usr/local/lib/python2.5/sgmllib.py", line 353, in finish_endtag
method = getattr(self, 'end_' + tag)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xae' in position 46: 
ordinal not in range(128)

And we're downhill from there.  Probably worth fixing, since it's one of the
few real-world HTML bugs that totally blows up BeautifulSoup.

					John Nagle
					SiteTruth


From barisc at bckm.org  Wed May 21 21:20:18 2008
From: barisc at bckm.org (Baris-C)
Date: Wed, 21 May 2008 18:20:18 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <37c23ff2-215d-4f90-ad8a-c70c2a25a0eb@79g2000hsk.googlegroups.com>

On May 21, 11:10?pm, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

By the way anything goes to you..


From johnjsal at gmailNOSPAM.com  Sun May 11 16:11:49 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Sun, 11 May 2008 16:11:49 -0400
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <48275316$0$11629$607ed4bc@cv.net>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Ok, I think most people are misunderstanding my question a little. I 
probably should have said xrange instead of range, but the point of my 
question remains the same:

Should a for loop be used simply to do something X number of times, or 
should it strictly be used to step through an iterable object for the 
purpose of processing the items in that object?


From msc at es.aau.dk  Wed May  7 07:24:22 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 13:24:22 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
Message-ID: <wdw63tquzkp.fsf@msc-dt.kom.auc.dk>

>>>>> "Duncan" == Duncan Booth <duncan.booth at invalid.invalid> writes:
[...]
Duncan> Now try:
Duncan> 
Duncan>    for command in getCommandsFromUser():
Duncan>        print "the result of that command was", execute(command)
Duncan> 
Duncan> where getCommandsFromUser is a greedy generator that reads from stdin, 
Duncan> and see why generators don't work that way.

I don't see a problem unless the generator isn't defined where it's
going to be used. In other similar input bound use cases, such as the
generator iterating over a query result set in my original post, I see
even less of a problem. Maybe I'm simply daft and you need to spell it
out for me. :-)

Martin


From http  Thu May  1 20:20:46 2008
From: http (Paul Rubin)
Date: 01 May 2008 17:20:46 -0700
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <7xve1xr1y9.fsf@ruckus.brouhaha.com>

jmDesktop <needin4mation at gmail.com> writes:
> I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these.  If I
> have mod_python or fastcgi on apache, where do I start?  I don't have
> clue where to begin to create a web page from scratch in python.  I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.

I didn't notice anyone mentioning the simplest answer of them all:
write an old fashioned cgi using python's cgi module.


From george.sakkis at gmail.com  Fri May 23 21:00:33 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 23 May 2008 18:00:33 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>

On May 23, 6:59?pm, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> ? ? ? ? printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> ? ? ? ? print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

The most obvious and readable of course: use two statements, as one
should do regardless of the language, instead of resorting to error-
prone hacks.

George


From dboddie at trolltech.com  Tue May 27 12:02:50 2008
From: dboddie at trolltech.com (David Boddie)
Date: Tue, 27 May 2008 18:02:50 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <200805271802.50256.dboddie@trolltech.com>

On Mon May 26 17:37:04 CEST 2008, Alex Gusarov wrote:

> Hello, I have strong .NET background with C# and want to do some familiar
> things from it with Python, but don't know how. For example, I created form
> in qt designer with QCalendarWidget, translated it into Python module and
> want to overload virtual method paintCell of QCalendarWidget. In C# I can
> write following (abstract) code:
> 
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
> 
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }

Right. I vaguely remember someone showing something like this at EuroPython
a couple of years ago. I believe that this approach is actually registering
an event handler (or callback) to handle a certain type of event.

> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's long
> and I must create additional class).

Just out of interest, given that you have to put the event handler somewhere,
why is it a problem to derive a new class and reimplement paintCell()?

It really isn't that much code:

  class MyCalendarWidget(QCalendarWidget):
  
      def paintCell(self, painter, rect, date):
          # some work here

> So, I need to run my code whenever paintCell is called by Qt internals and
> I have no enough experience with Python for it. Please, give me some
> advice, I know Python must be good enough to do such things.

The principal mechanism for doing this is via inheritance. You can do things
with event filters, but it's more complex and almost like working against the
design of the library to do so.

I have a feeling that the form produced by Qt Designer, once converted to
code, contains references to QCalendarWidget where you really want to use a
customized calendar widget. If so, you should "promote" the calendar widget
in Qt Designer to use your widget instead, and make sure you import the
module that supplies it in your application.

If you need more information about this, just ask.

David
-- 
David Boddie
Lead Technical Writer, Trolltech ASA


From fuzzyman at gmail.com  Sun May 25 06:01:35 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 03:01:35 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com> 
	<mailman.1551.1211678932.12834.python-list@python.org>
Message-ID: <b7402b32-ebb2-492b-bfa2-c0183a77329f@l42g2000hsc.googlegroups.com>

On May 25, 2:28?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Benjamin Kaplan" <benjamin.kap... at case.edu> wrote in message
>
> news:ec96e1390805241357i6e481e3enf12b4d213e887008 at mail.gmail.com...
> | On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzy... at gmail.com> wrote:
> || > For example, at Resolver Systems we expose the spreadsheet object
> | > model to our users. It hasa public, documented, API - plus a host of
> | > undocumented internally used methods.
> | >
> | > We would really *much* rather hide these, because anything our
> | > customers start using (whether documented or not) we will probably
> | > have to continue supporting and maintaining.
> | >
> | > The 'we told you not to use that' approach, when applied to paying
> | > customers doesn't really work... all they see is that you broke their
> | > spreadsheet code by changing your API.
>
> Python was not really written with 'difficult' customers in mind ;-)
>

True. It's extremely suited to what we do though.Minor difficulties
like this are vastly outweighed by advantages. The difficulties are
real though.

> One could largely hide private vars with a program that substituted random
> names for single _ names, and removed the doc strings for functions,
> classes, and methods with such names.
>


We need to *use* those names to display the spreadsheet once the
calculation has finished (and their code has run).

> Such a program could even put such names in a separate module imported as
> '_private_do_not_use_'.

Splitting more of the functionality out is probably part of the best
solution.

Michael Foord
http://www.ironpythoninaction.com/


From bignose+hates-spam at benfinney.id.au  Tue May 13 19:40:10 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:40:10 +1000
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <87prrp4vtx.fsf@benfinney.id.au>

hdante <hdante at gmail.com> writes:

>  How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server).

Complain to your ISP; let them know they have a paying customer who
isn't getting an essential internet service. (No, this likely won't
change *your* situation, and yes, most ISPs are this neglectful.)

Then, <URL:http://en.wikipedia.org/wiki/Usenet#Free_Usenet_servers> or
a similar resource.

> Do you recommend doing so ?

Yes, definitely. Google Groups treats Usenet messages poorly.

>  What's your prefered news reader ?

Gnus <URL:http://gnus.org/>, a program running in Emacs. Thunderbird
<URL:http://www.mozilla.org/products/thunderbird/>, slrn
<URL:http://www.slrn.org/>, and tin <URL:http://www.tin.org/> have
also given me good Usenet experiences in the past.

-- 
 \       "Courage is resistance to fear, mastery of fear ? not absence |
  `\                     of fear.  -- Mark Twain, _Pudd'n'head Wilson_ |
_o__)                                                                  |
Ben Finney


From hdante at gmail.com  Sun May  4 23:09:02 2008
From: hdante at gmail.com (hdante)
Date: Sun, 4 May 2008 20:09:02 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>

On May 4, 8:11?am, castiro... at gmail.com wrote:
> On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>
> > > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
> > >> I'm actually curious if there's a way to write a generator function
> > >> (not a generator expression) in C, or what the simplest way to do it
> > >> is... besides link the Python run-time.
>
> > > The reference implementation of Python is written in C, so obviously there
> > > must be a way to write something like generators in C.
>
> > Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
> > See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> > --
> > Gabriel Genellina
>
> Gabriel,
> How did your attempt turn out from last May? ?At first look, it's
> outside the scope of Python, but it is not the scope of C
> necessarily. ?Generators offer a lot of simplicity (which I haven't
> read about extensively, but am starting to see) that could gain some
> reputation for Python. ?What is the midpoint at which C could meet
> Python?
>
> There is no such thing as a 'frame' per se in C; byte code is
> integral. ?As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state. ?It's
> a hard thing to Google for without knowing the prior terminology for
> the work that's already been done on them in C. ?What work is there?
> Are any devs interested in pursuing it?
>
> The frame implementation.
>
> http://svn.python.org/projects/python/trunk/Include/frameobject.hhttp://svn.python.org/projects/python/trunk/Objects/frameobject.c
>
> The generator code.
>
> http://svn.python.org/projects/python/trunk/Include/genobject.hhttp://svn.python.org/projects/python/trunk/Objects/genobject.c
>
> I used Microsoft's search engine (python frame generator
> site:svn.python.org , links 3 and 5) to find it.

 Isn't this guy a bot ? :-) It's learning fast. I believe there is a
"frame" in C, composed of its stack and globals. For generators in C,
you may look for "coroutines". For example, see:

http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html

 A sample code follows:

#define crBegin static int state=0; switch(state) { case 0:
#define crReturn(i,x) do { state=i; return x; case i:; } while (0)
#define crFinish }
int function(void) {
    static int i;
    crBegin;
    for (i = 0; i < 10; i++)
        crReturn(1, i);
    crFinish;
}

 The "suspended state" is saved in the static variable. It's not
necessary to save the complete "frame", only the suspended state.



From __peter__ at web.de  Tue May 20 13:49:50 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 19:49:50 +0200
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
Message-ID: <g0v2vs$38b$01$1@news.t-online.com>

Nikhil wrote:

> I have recently written a small module. When I import the module, I
> always get the error
> 
> 
> only when I do
> 
>  >>> from local.my.module import *
> 
> --
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> ---
> 
> 
> but when I do the below, I do not get any error.
> 
> --
>  >> import local.my.module
>  >>
> --
> 
> Any ideas on what could be wrong?

Are you abusing the __all__ attribute?

$ cat tmp.py
__all__ = ['/xyz/py/file']

$ python -c "from tmp import *"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute '/xyz/py/file'

Peter


From mankoff at gmail.com  Fri May 16 15:08:41 2008
From: mankoff at gmail.com (mankoff)
Date: Fri, 16 May 2008 12:08:41 -0700 (PDT)
Subject: Malloc error
Message-ID: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>

Hi Group,

I'm brand spanking new to Python. Never coded in it, but I'm
comfortable coding in general in other languages. I'm Trying to get
some legacy code to run on a newer machine. I don't have access to the
legacy box for debugging.

I'm getting the following error:

Python(36979) malloc: *** error for object 0x88374: Non-aligned
pointer being freed
*** set a breakpoint in malloc_error_break to debug

My python version is:

$ python
Python 2.5.2 (r252:60911, Feb 22 2008, 07:57:53)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

And this is on an Intel MacBook running 10.5.2

The error is getting printed hundreds of times until I CTRL+C at which
point I see:

Python(36979) malloc: *** error for object 0xa58074: Non-aligned
pointer being freed
*** set a breakpoint in malloc_error_break to debug
Traceback (most recent call last):
  File "v2_to_bdb.py", line 104, in <module>
    main()
  File "v2_to_bdb.py", line 101, in main
    fill_dbm(f, dbm, info, ids, sources)
  File "v2_to_bdb.py", line 34, in fill_dbm
    mystring = stationstring.serialize(dict, data)
KeyboardInterrupt

And advice on how to work around this error will be much appreciated.

Thanks,

   -k.


From roy at panix.com  Wed May 21 08:27:15 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 08:27:15 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
Message-ID: <roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>

In article <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks Roy
> 
> Any ideas how to code this child process stuff, as I said I am newbie and 
> not from a coding background

The easiest thing would be to use os.system().  If you wanted to spawn 10 
child processes, you could do:

import os
for i in range(10):
    os.system ("./child.py &")

and then have child.py be a script that creates 1000 TCP connections.

Keep in mind that one man's stress test is another man's denial of service 
attack.  If there are any firewalls between you and your target, they may 
restrict the number of connections you get to make (or the rate at which 
they're created).  You may also get a polite phone call from your local IT 
people asking enquiring about your activities.


From inhahe at gmail.com  Fri May 16 11:58:49 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 11:58:49 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
Message-ID: <m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>

I'm not an expert in this but what does it mean to emphasize state?  It 
seems the opposite of that would be a) functional programming, and b) 
passing parameters instead of using global or relatively local variables. 
And maybe c) coroutines (generators as implemented in Python), although 
perhaps coroutines could be said to emphasize state inasmuch as they go out 
of their way to capture, objectify and reuse it (Stackless' microthreads, 
even moreso).  And Python seems to be well-noted for implementing some 
functional programming methodology, and as for passing parameters it's just 
as object-oriented as the rest of them.

But as I said, I'm not an expert, so let me know if I've gone astray..


> I have a proposition to ask you all: Python emphasizes state.  Is it
> true?
> 




From tjreedy at udel.edu  Thu May  8 01:14:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 01:14:31 -0400
Subject: class definition
References: <K5rUj.249337$pM4.157639@pd7urf1no>
	<a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4@mail.gmail.com>
Message-ID: <fvu27l$5s1$1@ger.gmane.org>


"Miles" <semanticist at gmail.com> wrote in message 
news:a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4 at mail.gmail.com...
| On Wed, May 7, 2008 at 7:40 PM, Yves Dorfsman <yves at zioup.com> wrote:
| > Does it make a difference if you put subclass object or not ?
|  Old-style | classes will go away in Python 3 (I think),

Have gone ;-)

| and all classes will have object as a base.






From jpager at cox.net  Sat May 24 02:12:28 2008
From: jpager at cox.net (Jeremy Pager)
Date: Fri, 23 May 2008 23:12:28 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<2235cb81-cc56-404e-978b-35c2b09c976e@34g2000hsh.googlegroups.com>
Message-ID: <op.ubm964rj5eblab@s11757>



On Fri, 23 May 2008 03:21:23 -0700, Ivan Illarionov  
<ivan.illarionov at gmail.com> wrote:

> On 23 ???, 02:20, Brad <b... at 16systems.com> wrote:
>> cm_gui wrote:
>> > Python is slow.
>>
>> It ain't C++, but it ain't a punch card either... somewhere in between.
>> I find it suitable for lots of stuff. I use C++ when performance really
>> matters tho... right tool for the job. Learn a good interpreted language
>> (Pyhton) and a good compiled language (C or C++) and you'll be just
>> fine. Until then, quit bitching.
>
>   It's wrong. Here's why.
>
>   Compare your statement to:
>    "OP:  Humans are weak.
>    "Brad:  They ain't gorillas, but they ain't insects either...
> somewhere in between."
>
>   Python is *not* in between C++ and something else.  It's far ahead
> of them all.  Raw speed is not the most important thing in programming
> languages like raw physical strength is not the most important thing
> in life.
>   Pure Python has less raw speed than most compiled-to-machine-code
> languages, but it doesn't matter.  Python can be extended easily and,
> most important, Python is smart.
>
>   Ivan


Except this conversation is not about whether Python is smart.  It's about  
whether Python is fast, so yes, in the context of this conversation, it  
does matter.


From ivan.illarionov at gmail.com  Fri May 23 15:42:03 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 12:42:03 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com> 
	<69oa1aF33cfteU1@mid.uni-berlin.de>
	<2826a237-a4e7-4aa5-a015-de00ef4ed642@w1g2000prd.googlegroups.com>
Message-ID: <4495496e-908d-4fee-b889-38c235c1c634@j22g2000hsf.googlegroups.com>

On 23 ???, 22:32, Jimmy <mcknight0... at gmail.com> wrote:
[...]
> however, how can I just simply know a key is pressed?

If you are on Linux, use XLib
http://python-xlib.sourceforge.net/

You need to catch the KeyPress or KeyRelease X events.
while 1:
    ev = display.next_event()
    if ev.type == X.KeyPress:
        key_code = ev.detail
        ....
    ....

Ivan



From gagsl-py2 at yahoo.com.ar  Tue May 13 06:38:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:38:40 -0300
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
Message-ID: <op.ua286qwbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <stanc at al.com.au> escribi?:

> I have 2 classes in python, the first one runs first and and then the  
> first one calls the second class. I want it to run the second class as a  
> separate thread but I want the first one to wait until the second class  
> is dead.
> Im having problem in both killing the second class when its done and  
> making the first class wait for it to finish.
> Im very confused on doing threads in python.

I'm confused trying to understand your requirements too. "run a class?"
Threads execute code, it's easier to think of them as *functions* that are  
executed at the same time (or almost).
So you have a function A that runs first, and creates a second thread that  
will execute function B. Then A will wait for B to finish. What do you  
want to do in A while it's waiting? Nothing? Then why to use a second  
thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt  
and others have specific ways to execute backgroung tasks while keeping  
the user interface responsive - you should tell us which one you're using  
in that case.

-- 
Gabriel Genellina



From ankitanand1986 at gmail.com  Wed May 28 06:25:20 2008
From: ankitanand1986 at gmail.com (Ankit)
Date: Wed, 28 May 2008 03:25:20 -0700 (PDT)
Subject: Flash Decoder
Message-ID: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>

Hi everyone,i wanted to build a flash decoder using python can
somebody tell me which library to use and what steps should i follow
to make a flash(video) decoder?By a decoder i mean that i need to
display all the pixel values of each frame.Waiting for your replies.


Regards
Ankit Anand


From aquagnu at gmail.com  Fri May 23 21:31:25 2008
From: aquagnu at gmail.com (Yosifov Pavel)
Date: Fri, 23 May 2008 18:31:25 -0700 (PDT)
Subject: Unhandled exceptions checking
Message-ID: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>

Does somebody know existent tool for checking unhandled exceptions?
Like in Java when method throws exception but in code using this
method, try...catch is missed. May be something like PyChecker?

--
/Pavel


From notbob at nothome.com  Sat May 10 13:22:50 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 17:22:50 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
Message-ID: <KRkVj.1700$_01.929@fe091.usenetserver.com>

On 2008-05-10, Diez B. Roggisch <deets at nospam.web.de> wrote:
> notbob schrieb:

>> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
>> dir, same permission, etc. 
>
> I'm pretty sure you misse the correct shebang - 

Sorry.  Both exactly the same.  I checked 5 times.

helloworld shebang:  #!/usr/bin/python
while shebang:       #!/usr/bin/python

(above yanked from respective scripts)

nb


From bj_666 at gmx.net  Wed May 14 02:37:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 May 2008 06:37:55 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
Message-ID: <68vfm3F2v0piaU2@mid.uni-berlin.de>

On Tue, 13 May 2008 10:20:41 -0700, John Nagle wrote:

> Matt Nordhoff wrote:
>
>> Well, you should use "xrange(10)" instead of "range(10)". 
> 
>    CPython really is naive.  That sort of thing should be a
> compile-time optimization.

It's not naive, it can't know at compile time what object is bound to the
name `xrange` at runtime.

Ciao,
	Marc 'BlackJack' Rintsch


From pakodagu86146 at hotmail.com  Fri May  9 11:18:57 2008
From: pakodagu86146 at hotmail.com (pakodagu86146)
Date: Fri, 9 May 2008 11:18:57 -0400
Subject: No one will ever know
Message-ID: <BLU102-DAV122CA421CAC04596A104B6F0D30@phx.gbl>

You will not find a better watch copy for less

Every type and style

http://cunidezetoc62.blogspot.com




From vbgunz at gmail.com  Wed May 14 11:24:18 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 08:24:18 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
Message-ID: <b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>

> > An instance method works on the instance
> > A Static method is basically a function nested within a class object
> > A class method is overkill?
>
> If anything, a static method is overkill...
> class Foo:
>
> ? ?@classmethod
> ? ?def register(cls, listener):
> ? ? ? ?cls.LISTENERS.append(listener)

When I learned about static methods, I learned they're a way to
tightly couple some functionality with a class without tying the
functionality to any of the instances. I see them as nothing more than
a design decision. To me they make some sense.

Other than a methods signature (classmethod(cls, l) and a
staticmethod(l)) a class method does anything that a static method
does and gets the CLS reference for FREE? Is this why a static method
is considered to be overkill? In other words, either one can be called
from either the class or the instance and both work pretty much the
same *but* only the class method includes the class for reference and
the static method does not?

The only real difference I see between an instance and either a class
or static method is the whole bound/unbound thing. Otherwise, even an
instance can do what the others do *just* the instance method can only
make those calls through an instance and not the class.

Instance methods make the most sense. A static method makes sense too
*but* I can see how a class method not only does what a static method
does but how a class method *also* gets the cls reference for free.

Am I correct?


From notbob at nothome.com  Wed May 21 17:30:39 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:30:39 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<a7ae43da-7ce4-44e5-827e-db3289e0ddf6@e39g2000hsf.googlegroups.com>
Message-ID: <3w0Zj.205$y_.122@fe091.usenetserver.com>

On 2008-05-21, Carl Banks <pavlovevidence at gmail.com> wrote:

> If you just want to write a simple blog, PHP is probably good enough.
> It's undeniably easier to jump into web programming with PHP--
> partially because of it's widespread support and straightforward
> usage, partially because Python web solutions tend to aim for
> separability of content and presenation which raises the bar for
> entry--and that could easily outweigh your concerns over quality of
> the language.
>
> (Incidentally: if you didn't want to start a religious war, it would
> have been better if you had posted it separately to the two groups.
> Lots of flamewars start by one person posting a cutdown not intended
> for the ears of the other group.)

Yeah, but years of usenet have taught me how to navigate the battlefield.
Your top paragraph above is the kind of advice I'm looking for.  Thank you.

nb


From jarausch at igpm.rwth-aachen.de  Tue May 20 06:25:36 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 12:25:36 +0200
Subject: compressing short strings?
In-Reply-To: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <69fn92F329s6vU2@mid.dfncis.de>

Paul Rubin wrote:
> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
> 
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
> 

I'd ask in comp.compression where the specialists are listening and who are
very helpful.


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From ivan.illarionov at gmail.com  Sun May 25 20:07:16 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 00:07:16 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
Message-ID: <g1cuvj$1rpd$1@news.mtu.ru>

On Sun, 25 May 2008 16:23:12 -0700, NC wrote:

>> I didn't say that it's not possible to write good code in PHP,
> 
> Indeed you didn't.  You did, however, say that development in Python/
> Django is inherently faster than development in PHP (your exact words
> were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
> 50-fold difference).  This claim has just been obliterated using the
> example you (not I) provided; my estimate of two man-years for
> developing WordPress turns out to be fairly close to what has actually
> gone into the development of Byteflow.  In other words, so far we have
> discovered no evidence of Python's (or PHP's, to be fair) superiority in
> terms of developer's productivity.

In this case (excellent blogging tool), yes, I agree.

>> IMHO Python language is better designed
> 
> That is indeed a matter of opinion.  You like (among other things)
> immutable strings, the off-side rule, the idea that everything is an
> object, and the fine distinction between mutable lists and immutable
> tuples, and I have no problem with you liking these features, as long as
> you agree that other people may have reasons to like the alternatives
> better.

I agree. We like different things and it's good.

>> Yes, it's possible to write something clean in PHP but it would require
>> a lot more work.
> 
> In my opinion, it wouldn't, and in my experience, it doesn't.  All you
> need is to actually put a designer in charge of design.  Additionally,
> there are situations (rapid prototyping, for example) when
> maintainability (the requirement behind the "clean code") is simply not
> a concern.

It's hard to me to write good PHP. I feel happy programming in Python and 
I felt very unhappy when I had to program in PHP.  I'm glad that you have 
a different experience.

Ivan



From castironpi at gmail.com  Wed May  7 20:32:10 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:32:10 -0700 (PDT)
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<mailman.728.1210197111.12834.python-list@python.org>
Message-ID: <e06b0787-4532-48f5-b81b-5e97b489d918@56g2000hsm.googlegroups.com>

On May 7, 4:51?pm, Michael Torrie <torr... at gmail.com> wrote:
> Martin Sand Christensen wrote:
> > Why don't
> > generators follow the usual eager evaluation semantics of Python and
> > immediately execute up until right before the first yield instead?
>
> A great example of why this behavior would defeat some of the purpose of
> generators can be found in this amazing PDF presentation:
>
> http://www.dabeaz.com/generators/Generators.pdf
>
> > Giving generators special case semantics for no good reason is a really
> > bad idea, so I'm very curious if there is a good reason for it being
> > this way. With the current semantics it means that errors can pop up at
> > unexpected times rather than the code failing fast.
>
> Most assuredly they do have good reason. ?Consider the cases in the PDF
> I just mentioned. ?Building generators that work on the output of other
> generators allows assembling entire pipelines of behavior. ?A very
> powerful feature that would be impossible if the generators had the
> semantics you describe.
>
> If you want generators to behave as you suggest they should, then a
> conventional for x in blah approach is likely the better way to go.
>
> I use a generator anytime I want to be able to iterate across something
> that has a potentially expensive cost, in terms of memory or cpu, to do
> all at once.

The amount of concentration you can write in a program in a sitting
(fixed amount of time) is kind of limited.  Sounds like @greedy was
the way to go.  The recall implementation may have a short in the
future, but isn't functools kind of full?  Has wraptools been
written?  Is it any different?

Naming for @greedy also comes to question.  My humble opinion muscles
glom on to @early vs. @late; @yieldprior; @dropfirst; @cooperative.
Thesaurus.com adds @ahead vs. @behind.



From bj_666 at gmx.net  Thu May  8 09:15:16 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 13:15:16 GMT
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
Message-ID: <68gcn4F2su97jU1@mid.uni-berlin.de>

On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:

> Are you a newbie to Python, or to programming in general? I'll assume
> you are a newbie to programming in general because of that last
> question you asked. Things in Python are easier than in almost any
> other programming language. Here are three Hello World programs:

Counterexamples for quite short "greetings" in other programming languages:

(Free)BASIC::

  Print "Hello World!"

OCaml::

  print_string "Hello World!" ;;

Io::

  "Hello World!" linePrint

Haskell::

  main = putStrLn "Hello World!"

Ciao,
	Marc 'BlackJack' Rintsch


From bj_666 at gmx.net  Wed May 14 02:04:27 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 May 2008 06:04:27 GMT
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <68vdnbF2v0piaU1@mid.uni-berlin.de>

On Tue, 13 May 2008 08:28:00 -0700, Paul Miller wrote:

> Alternatively, does anyone know of any literate programming tools which
> support Python well?

There's PyLit_.  It uses reStructuredText_ and can translate between a
reStructuredText with code blocks and source code with the text as
comments in both directions.

.. _PyLit: http://pylit.berlios.de/
.. _reStructuredText: http://docutils.sourceforge.net/

Ciao,
	Marc 'BlackJack' Rintsch


From robin at reportlab.com  Mon May 19 12:24:24 2008
From: robin at reportlab.com (Robin Becker)
Date: Mon, 19 May 2008 17:24:24 +0100
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <4831A9B8.9050101@chamonix.reportlab.co.uk>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
.......
> 
I programmed several large optimization problems in python. Mostly I used the 
old numeric extension for the optimization parts eg vector calculations matrix 
inversions etc etc, but I think numpy is used now. Since most of the work was 
performed in the C extension we didn't really notice the 'slowness' of python's 
interpreter.
-- 
Robin Becker



From yves at zioup.com  Mon May 12 23:21:06 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:21:06 GMT
Subject: anonymous assignment
In-Reply-To: <87d4ns6nq5.fsf@benfinney.id.au>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no> <87d4ns6nq5.fsf@benfinney.id.au>
Message-ID: <CO7Wj.264439$pM4.238124@pd7urf1no>

Ben Finney wrote:

>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>> But you still have have a variable that's using memory for nothing.
> 
> No, you have one extra unused name binding. The values that you don't
> want to use have *already* been allocated by the time the above
> statement is executed. Name binding doesn't copy the values, it merely
> binds a name to them. There's no "variable" in the above statement.
> 

But if this happens in the main part of your script, it could take a long 
time before this binding disapear, therefore, the gc won't be able to clean 
that one up. In this particular case, it doesn't really matter (small size), 
but imagine in a case where we are talking of a list of list, with 
potentially large element in the list.


Yves.


From stodge at gmail.com  Fri May  2 20:36:10 2008
From: stodge at gmail.com (Stodge)
Date: Fri, 2 May 2008 17:36:10 -0700 (PDT)
Subject: Boost::Python - Question about object ownership and lifetime
Message-ID: <2eaa8cb1-bf88-4851-a933-19d1b692c6c7@d45g2000hsc.googlegroups.com>

Hi folks, new to Boost Python and struggling to build a prototype at
work. I thought I'd start with a conceptual question to help clarify
my understanding. I already have a basic prototype working nicely but
I'm having a few issues, which I may post about later.

A brief functional rundown of what I'm trying to prototype. Hopefully
my explanation doesn't get too confusing!

I'm embedding a python module into an application; Python will provide
application logic, responding to events such as timers expiring or the
user clicking widgets.

I have the following classes I'm exporting to Python:

Entity, DerivedEntity, EntityList (contains pointers to Entity).

They all have varying types of copy/constructors, e.g. some are
private, some have non-const copy constructors etc. It's inherited
code that I can't mess with so I'm stuck with it.

So the typical logic flow I'm looking at is:

C++ Application:

- Create an instance of EntityList called entity_list, populate with
many instances of DerivedEntity.
- Create an instance of EntityList called change_list
- Invoke python function passing entity_list and change_list as
parameters

Python:

- For each entity in entity_list:
    - Invoke C++ function clone_entity, pass entity as parameter

    C++ Application:

    - Create clone of entity like this --> DerivedEntity* entity_copy
= new DerivedEntity(entity)
    - return entity_copy to Python

Back in Python again:

    - Apply logic to entity_copy returned from clone_entity C++
function
    - If entity_copy updated add to change_list

Back in C++ Application:

- For each new_entity in change_list
    - Apply further logic to new_entity
    - Delete new_entity pointer
- Clear the change_list

I'm having problems in my prototype - it looks like I have a memory
leak but I'm not sure where. So my question is, what should I be aware
of in this logic flow with regards to object ownership and lifetime?

When I receive entity_copy in Python, returned from clone_entity, what
happens to this object when I insert it into change_list and
subsequently delete the C++ pointer? I don't know how to prove that
the Python object is being deleted and isn't hanging around due to a
lifetime issue,

I guess my main problem is that I'm entirely sure I understand object
ownership - who owns what object when it's created in C++, passed to
Python and then returned back to C++ to be deleted.

So if any of this makes sense, I would greatly appreciated any
suggestions or help. I'm very impressed with Boost Python so far but
my own lack of understanding is holding me back I think.

Thanks again
Mike


From pupeno at pupeno.com  Thu May 15 19:20:08 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Thu, 15 May 2008 16:20:08 -0700 (PDT)
Subject: ElementTree and DTDs
Message-ID: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>

Hello,

Is ElementTree supposed to load DTDs? I have some xmls heavy on
entities and it fails this way:

Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> filename = "revo/xml/a.xml"
>>> import xml.etree.ElementTree as ET
>>> ET.parse(filename)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 862, in
parse
    tree.parse(source, parser)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 586, in
parse
    parser.feed(data)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in
feed
    self._parser.Parse(data, 0)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1201, in
_default
    self._parser.ErrorColumnNumber)
xml.parsers.expat.ExpatError: undefined entity &jcirc;: line 13,
column 10
>>> import xml.etree.cElementTree as ET
>>> ET.parse(filename)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 45, in parse
  File "<string>", line 32, in parse
SyntaxError: undefined entity &c_j;: line 46, column 17

Thanks.


From d.a.abernathy at gmail.com  Wed May 14 15:25:45 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 14 May 2008 12:25:45 -0700 (PDT)
Subject: Using the indent method
Message-ID: <ffbc75e3-612b-4195-b9c1-11df9e66d286@f63g2000hsf.googlegroups.com>

Hello All,

I am using elementtree to write an XML document and I am having a hard
time adding the correct indentation.
I have tried using the indent method, but I can not figure out how to
use it. Any suggestions.


From philr at aspexconsulting.co.nz  Wed May 28 16:47:08 2008
From: philr at aspexconsulting.co.nz (Phil Runciman)
Date: Thu, 29 May 2008 08:47:08 +1200
Subject: FW: php vs python
Message-ID: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>



-----Original Message-----
From: Jerry Stuckle [mailto:jstucklex at attglobal.net] 
Sent: Wednesday, 28 May 2008 1:48 p.m.
To: python-list at python.org
Subject: Re: php vs python

Ivan Illarionov wrote:
> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language
and
>>> easier in another.
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good
code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

Yes it does matter. 

I have programmed in many assembly and higher level languages. 

In OldenTimes:
In Algol 60 I was productive from the start.
KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
made it even better).
IBM 360 Assembly was poorer but not a disaster.
PL1 was a mess. You could write good code but why bother?
COBOL was fit for purpose and when combined with Jackson structured
programming could be used straight away by rooky programmers in business
systems programming. I am sure it has progressed since ANSI 68.

The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
if language does not matter?

My 2c worth.




From shiningsandy at gmail.com  Tue May 20 03:04:13 2008
From: shiningsandy at gmail.com (sandeep)
Date: Tue, 20 May 2008 00:04:13 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com> 
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com> 
	<1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>
Message-ID: <2598173e-356e-49b8-8875-00556f5cfe98@j33g2000pri.googlegroups.com>

hi all

thanks for ur replies. i have a bit closer look at my code and i am
able to fix the problem.now my exe is working fine.the code is bit
more cleaner now as i removed lot of unused function from it and try
to document it also.


import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    emailData=""
    for kk in range(len(obj.Items)-1,0,-1):
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        emailData=emailData+getEmailData(mailItem)
        saveAttachments(mailItem.Attachments)
    txt_file.write(getHTMLString(emailData))
    txt_file.close()

#function which will return the emailItem data as form of String
def getEmailData(mailItem):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    return dataToWrite

#function for saving the attachment.we are calling attachments
SaveAsFile to save the attachment.
#SaveAsFile is com method.for more info dig into msdn :-)
def saveAttachments(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        abc=os.path.isdir(os.getcwd()+'\email')
        if(abc==True):
            print 'directory exists'
        else:
            os.mkdir(os.getcwd()+'\email')
        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)

# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):
    if isinstance(a,str):
       b='not a unicode string'
    else:
        a.encode('utf-8')
        #print 'unicode type'
    return a

#bit of html stuff so that i can see my output on browsers.
def getHTMLString(emailData):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+emailData+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    inbox_obj=getOutLookFolders(outlook_app)
    getMailContent(inbox_obj)

main()

once again thanks for your help.

thanks and regards
sandeep kumar sharma


From matthieu.brucher at gmail.com  Sun May 18 03:55:57 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sun, 18 May 2008 09:55:57 +0200
Subject: Python library for clustering from distance vector
In-Reply-To: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
References: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805180055jcc0de01s92b4c03187b533d9@mail.gmail.com>

Hi,

You should send your question on the scipy user ML. If you use a distance
between objects, you can try the kmeans (implemented in scipy), if you use
similarities, you can change them to dissimilarities and use the same
function.

Matthieu

2008/5/18 Sengly <Sengly.Heng at gmail.com>:

> Dear all,
>
> I am looking for a python library which can cluster similar objects
> into their respective groups given their similarity score of each two
> of them. I have searched the group but I couldn't find any helpful
> information yet.
>
> Any suggestion is appreciated. Also, if you know any specific group
> that I should post this message, please also suggest.
>
> Thank you.
>
> Sengly
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From dullrich at sprynet.com  Sat May 24 07:12:35 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:12:35 -0500
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<89be7f59-4c08-4739-ab07-d310e0c6aef3@2g2000hsn.googlegroups.com>
Message-ID: <rrtf34pi4vb87pjf86mk6s2tii3ni54oa3@4ax.com>

On Fri, 23 May 2008 14:00:33 -0700 (PDT),
"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> wrote:

>On 23 mai, 10:42, "inhahe" <inh... at gmail.com> wrote:
>> "Bruno Desthuilliers" <bruno.42.desthuilli... at websiteburo.invalid> wrote in
>> messagenews:4836772e$0$6097$426a74cc at news.free.fr...
>>
>> > Brad a ?crit :
>> >> cm_gui wrote:
>> >>> Python is slow.
>>
>> >> It ain't C++, but it ain't a punch card either... somewhere in between. I
>> >> find it suitable for lots of stuff. I use C++ when performance really
>> >> matters tho... right tool for the job. Learn a good interpreted language
>> >> (Pyhton) and a good compiled language (C or C++)
>>
>> > LordHaveMercy(tm). Could you guys please learn what you're talking about?
>>
>> > 1/ being interpreted or compiled (for whatever definition of these
>> > terms) is not a property of a language, but a property of an
>> > implementation of a language.
>>
>> That's like saying being spherical is not a property of planets, it's a
>> property of an instanciation of a planet.
>
>I do definitively not have the required knowledge to say anything
>about "being spherical" being part of the definition of what a
>"planet" is or not.

I wasn't going to mention this since it's really not relevant,
but since you raise the question: Actually it was a bad analogy
because being roughly spherical _is_ part of the definition of
"planet". (Of course "spherical" must mean "roughly spherical"
here, since no planet is exactly spherical.)

A little while ago when Pluto got demoted so it's no longer
officially a planet they came up with a definition - part of
the definition is that the body is large enough that gravity
causes it to assume a spherical shape.

>>, and b) It's a far cry to
>> imagine a planet coming into being that's not spherical
>
>Idem
>
>>  (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
>Now this I can tell is false. The problem is not that it's difficult
>to "make a native compiler for" dynamic languages, the problem is that
>it's difficult to write native compiler for dynamic languages that
>generates code that beats the VM/byte-code interpreter/whatever you
>name it to be wotrh the effort.
>
>> I guess I
>> should also mention that Python isn't very practical (as in "suitable",
>> "right tool for the job", and "perfomance", as mentioned in the above post)
>> without an implementation.
>
>That is debatable. There are algorithm courses taught in "pseudo-code"
>- that is, a language that doesn't have any known implementation.
>
>> So I don't think this distinction has any use
>> other than to beat other people over the head with a bat.
>
>Ok, *you* know this - I mean, the distinction between a language and a
>language's implementation(s).  Are you sure everyone saying - or
>reading - assertions such as "language XXX is slow" or "compiled
>languages are faster" etc really know what they're talking about ?
>
>> > 2/ actually, all known Python implementations compile to byte-code.
>>
>> Which is then interpreted, but you're still technically right, because
>> "compiled" can mean either compiled to bytecode or compiled to native code,
>> despite what it actually did mean.  Semantics FTW!!
>
>Yes, semantics. But a bit more than semantics - byte-code interpreters
>are usually way faster than "pure" interpreter, and start to be fast
>enough for quite a lot of practical use.
>
>Ok, I'll stop on this - once again, sorry for the noise, and please
>bear with me, I tend to be a bit too much on the pedantic side
>sometimes. But still, thanks to the pedantics peoples on usenet that
>taught me so much so far and still teach me more and more...

David C. Ullrich


From stef.mientki at gmail.com  Sat May 10 15:55:26 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 10 May 2008 21:55:26 +0200
Subject: Any other UI kits with text widget similar to that in Tk?
In-Reply-To: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>
References: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>
Message-ID: <4825FDAE.1050903@gmail.com>

Kenneth McDonald wrote:
> I'm wondering if any of the other GUI kits have a text widget that is 
> similar in power to the one in Tk. wxWindows, from what I can tell, 
> doesn't offer nearly the options the Tk widget does. I'm less familiar 
> with Qt. Any feedback would be most appreciated.
>
> Thanks,
> Ken
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
Don't know what the power of tk is,
but wxPython has the powerfull Scintilla and a less sophisticated 
richtext on board.

cheers,
Stef


From sarenius at sun3.oulu.fi  Sun May 25 15:34:08 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:34:08 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi> <4839BEF6.3060209@behnel.de>
Message-ID: <slrng3jfpg.hio.sarenius@sun3.oulu.fi>

In article <4839BEF6.3060209 at behnel.de>, Stefan Behnel wrote:
>Vesa-Matti Sarenius wrote:
>> This did not work. Neither did commenting all print lines. The problem is
>> somewhere else.
>
>As Tim said, the line number that the exception prints would help here.

See my followup... 

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *




From beema.shafreen at gmail.com  Sat May 17 01:49:05 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Sat, 17 May 2008 11:19:05 +0530
Subject: set function
Message-ID: <aa405c1f0805162249u45280c76v82f72daa0a748635@mail.gmail.com>

Hi all,
I need to find the intersection of 10 different files with ids defined as
a_items, b_items and so on

common_items = a_items&b_items&c_items&\
               d_items&e_items&f_items\
               &g_items&h_items&i_items&j_items

i have included above line in the script
is this an right way will my program accept it or what are the other option
to compare 10 different such items
-- 
Beema Shafreen
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From wizzardx at gmail.com  Wed May  7 03:13:06 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:13:06 +0200
Subject: How do you debug memory usage?
In-Reply-To: <d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>
References: <mailman.652.1210080485.12834.python-list@python.org>
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
	<mailman.678.1210108782.12834.python-list@python.org>
	<d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>
Message-ID: <18c1e6480805070013l1a4ef751s949cf64222f473c0@mail.gmail.com>

>  Rsync uses a lot of memory:
>    http://www.samba.org/rsync/FAQ.html#4
>  rdiff-backup uses librsync, not rsync.
>  I'm not sure if rsync uses librsync, but one could speculate that
>  they share some code and perhaps some of the same problems.
>  But 2GB seems excessive unless you are dealing with millions of files.
>  A memory leak seems more likely.
>

Thanks for your input. In case you're interested here's a link to my
post to a local Linux user group:

http://lists.clug.org.za/pipermail/clug-tech/2008-May/040532.html

David.


From pavlovevidence at gmail.com  Mon May 12 00:32:13 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 11 May 2008 21:32:13 -0700 (PDT)
Subject: Convention for name indicating "don't care about the value" (was:
	Is using range() in for loops really Pythonic?)
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com> 
	<8763tk89zu.fsf_-_@benfinney.id.au>
Message-ID: <34706c6d-108b-418d-9033-1beb72d6599c@k13g2000hse.googlegroups.com>

On May 11, 11:41 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > In such cases, the name 'dummy' is conventionally bound to the items
> > > from the iterator, for clarity of purpose::
>
> > >     for dummy in range(10):
> > >         # do stuff that makes no reference to 'dummy'
>
> > Is this documented?
>
> It's not a documented standard, to my knowledge.
>
> > I've never heard of this convention. It's not PEP 8, and I've never
> > seen consistent usage of any name. I'd be interested in knowing
> > where you read that this was a convention, or in what subcommunities
> > it's a convention in.
>
> It has been in this forum that the use of the name '_' for "don't care
> about the value" was deprecated, since that name is already overloaded
> with other meanings.

That doesn't follow at all from what you wrote: no one in this thread
had even mentioned the usage of "_" for unused values--how did you
expect us to know you were talking about something no one brought up?

So it seems that usage of "dummy" is not a convention, and avoidance
of "_" is not really a convention except on this group.


> > I think dummy is a terrible name to use for this, since in no other
> > usage I can think of does the word "dummy" suggest something isn't
> > used.
>
> I think it's far superior to '_'. I'd be just as happy with any other
> name that explicitly distinguishes itself for this purpose.
>
> > If a value isn't used, then I think the most clear name for it is
> > "unused".
>
> Sounds good to me. Now we merely need to convince the world.

I'm happy to discourage the world from using "_" for this purpose;
ambivalent whether you even need to use a specific name.


Carl Banks


From inhahe at gmail.com  Fri May 16 10:43:58 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:43:58 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
Message-ID: <b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>

Well the problem is that I'm actually not an assembler guru, so I don't know 
how to implement a dll in asm or use a c calling convention, although I'm 
sure those instructions are available on the web.  I was just afraid of 
trying to learn that AND making python-specific extensions at the same time. 
I thought of making a c extension with embedded asm, but that just seemed 
less than ideal.  But if somebody thinks that's the Right Way to do it, 
that's good enough..

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:695jdlF30fp0gU1 at mid.uni-berlin.de...
> inhahe schrieb:
>> Can anyone give me pointers/instructions/a template for writing a Python 
>> extension in assembly (or better, HLA)?
>
> You could write a C-extension and embed assembly. See the docs for how to 
> write one. If you know how to implement a C-callingconvention-based shared 
> library in assembly (being an assembler guru you sure know how that 
> works), you could mimic a C-extension.
>
> Diez 




From zapwireDASHgroups at yahoo.com  Tue May 27 16:21:52 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:21:52 -0700
Subject: Weird exception in my, um, exception class constructor
Message-ID: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>

I have a generic (do nothing) exception class that's coded like this:

class MyError(exceptions.Exception):
    def __init__(self,args=None):
        self.args = args

When I attempt to raise this exception via 'raise MyError' I get an exception 
within the MyError constructor __init__ as follows:

Traceback (most recent call last):
[lines deleted]
  File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
MyStuff.py", line 7, in __init__
    self.args = args
TypeError: 'NoneType' object is not iterable

Ummm... why should 'args' have to be iterable anyway?  I don't understand 
what's going on here?  Could someone help me with this?

I've found empirically that I can write:

    if args self.args = args

...and everything *appears* to work OK, but I'd really like to know what the 
core problem is.

Thank you,
---Joel





From znfmail-pythonlang at yahoo.com  Tue May 20 12:04:27 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Tue, 20 May 2008 12:04:27 -0400
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org> <g0sbns$a5i$1$8300dec7@news.demon.co.uk>
Message-ID: <g0usqg$oka$1@aioe.org>

Thank you and the other responders have given me something to consider, I 
understand the concept of the posterize idea and will be experimenting with 
that.

I wanted to respond to this statement below which is true, however I believe 
the histogram sums the values so both colors would be in bin 229.  I say 
that because all white is in histogram element 767, while black is in 
element 0. Anyone on this list know how to interpret the histogram list? 
Your point is still valid regardless of my interpretation.

> So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
> the bin for G=27. But they are very different colours.

I will be checking out the SIG for PIL thanks for that pointer.



"Ken Starks" <straton at lampsacos.demon.co.uk> wrote in message 
news:g0sbns$a5i$1$8300dec7 at news.demon.co.uk...
>I would still be concerned that you are checking against the percentage
> of the 768 bins returned by the histogram method. Two pixels of
> widely different colour end up in the same bin, so long as just ONE
> of the Red, Green, or Blue components is equal.
>
> So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
> the bin for G=27. But they are very different colours.
>
> There are actualy 256 * 256 * 256 colours, but I don't suppose
> you want that many bins!
>
> What you want is a much smaller number of bins, with pixels
> of 'close' colours (whatever that means) put into the same bin.
>
> What 'close' means for colours, is quite a difficult thing, and
> the consensus is that using the three RGB coordinates is not
> as good as certain other colour spaces.
>
> You could use the ImageOps.posterize method to reduce the number of 
> colours in the image, but whether 'close' colours end up together,
> I don't know.
>
> You might try the PIL special interest group (SIG) 'image-sig'
>
> http://mail.python.org/mailman/listinfo/image-sig
>
> (If you want to know exactly how many unique colours an image actually
> has, load the image into the 'GIMP' assuming you have it,
> and go to :
>
> Menubar --> Filters --> Colours --> Colourcube analysis...
>
> )
>
>
>
>
>
>
>
>
>
>
> Poppy wrote:
>> Thanks, since posting I  figured out how to interpret the histogram 
>> results, which seems to be the consensus in responses. I wrote a check 
>> image program and have been periodically calling it against a folder 
>> where I make a copy of our images used for production. My method right 
>> now is to check what we send for errors, but is not preventive.
>>
>> Also I determined whitespace is not the only issue, any color that 
>> dominates. I'm considering rewriting this code below to setup bins, so if 
>> combined neighboring colors exceeds the threshold then reject the image. 
>> I have examples where half the image appears black, but actually varies 
>> throughout.
>>
>> Since my image is RGB I'm looping through a 768 element list.
>>
>> Zach-
>>
>> import Image, os
>>
>>
>> def check_image(file):
>>
>>     try:
>>         im = Image.open(file)
>>     except:
>>         return "Can't open file %s " % file
>>
>>     imData = im.histogram()
>>     i = 0
>>     for ea in imData:
>>         if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
>>             return "bad image %s - %s element num is %s " % (file, ea, 
>> str(i))
>>         i = i + 1
>>
>>     return "good image %s, image size is %s" % (file, im.size)
>>
>>
>> def main(dir):
>>     data = ""
>>     try:
>>         files = os.listdir(dir)
>>         for ea in files:
>>             data = data + str(check_image(os.path.join(dir,ea))) + "\n"
>>     except:
>>         return "Can't get files in %s" % dir
>>     return data
>>
>> print main("\\\\host\\path\\to\\image_folder\\")
>> 



From pyn3wb at pyn3wb.com  Mon May 12 16:00:52 2008
From: pyn3wb at pyn3wb.com (pyn3wb)
Date: Mon, 12 May 2008 20:00:52 GMT
Subject: thread stomp?
Message-ID: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>

class1 (threading.Thread):
	def __init__(self, dir):
		self.dir = dir
		threading.Thread.__init__(self)
	
	def run(self):
		do stuff in dir here...

class2 (threading.Thread):
	def __init__(self, dir, dir2):
		self.file = g
		self.dir2 = dir2
		threading.Thread.__init__(self)

	def run(self):
		do stuff in dir here...
		output to dir2

class main
	for i in dircache.listdir(dir):
		//run over files
		class1(dir).start()

	for j in dircache.listdir(dir2):
		//run over files, dependent on stuff in dir
		class2(dir2).start()

think just using the loops above enough to prevent class2 threads from 
starting before class1 threads done

not true

class2 threads seems to start prior to class1 threads done; class2 
results depend on class1 finish first

any help?


From anand.prabhakar.patil at gmail.com  Thu May 29 14:30:03 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 19:30:03 +0100
Subject: MACOSX_DEPLOYMENT_TARGET mismatch bug on Leopard using system Python
Message-ID: <76716DE1-B3A8-4A40-A73A-D5273400B05A@gmail.com>

Hi all,

I'm getting error messages like

distutils.errors.DistutilsPlatformError: $MACOSX_DEPLOYMENT_TARGET  
mismatch: now "10.3" but "10.5" during configure

on Leopard using system Python when trying to build a third-party  
module. Can this be fixed without installing a different distribution  
of Python? Googling the problem turns up fixes that involve  
configuring source distributions, unless I'm mistaken.

Thanks,
Anand Patil


From gagsl-py2 at yahoo.com.ar  Sat May 10 22:07:58 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 23:07:58 -0300
Subject: Can I "delete" the namespace of a module that i import?
References: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>
Message-ID: <op.uayv7kwnx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 11:06:49 -0300, gbin,Zhou <scuteezgb at gmail.com> escribi?:

>    I see from "http://docs.python.org/tut/node11.html" that "Name
> spaces are created at different moments and have different lifetimes.
> The namespace containing the built-in names is created when the Python
> interpreter starts up, and is never deleted. The global namespace for
> a module is created when the module definition is read in; normally,
> module namespaces also last until the interpreter quits."
>    So can I "delete" the namespace of a module that i import?

You can make Python "forget" a module by removing it from sys.modules; that way, next time you import it, Python will load it again from file.
Or you can use the built-in reload() function to get a "fresh" copy from file.
But any references to objects in the old module will still refer to the old objects (that means, by example, that existing instances of classes defined in the module will still refer to the old definition)

-- 
Gabriel Genellina



From benjamin.kaplan at case.edu  Tue May  6 09:57:41 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 6 May 2008 09:57:41 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805060657i655c9823g42c01d63dce98e1a@mail.gmail.com>

On Tue, May 6, 2008 at 9:44 AM, jmDesktop <needin4mation at gmail.com> wrote:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I believe Python 3 introduces Abstract Base Classes, so you can use that
once it comes out.
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From mail at timgolden.me.uk  Thu May 29 09:53:54 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 14:53:54 +0100
Subject: Finding file details...
In-Reply-To: <2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>	<mailman.1721.1212054906.12834.python-list@python.org>
	<2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
Message-ID: <483EB572.8070400@timgolden.me.uk>

Kalibr wrote:
> On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>> You don't say, but I assume you're on Windows since you mention
>> GetFileVersionInfo (which doesn't have anything to do with media
>> files, by the way) and WMA. There may be packages out there
>> to do all this already but if not you'll need to pull in a few disparate
>> modules and mix'n'match.
>>
>> While ID3 readers (which determine the metadata for MP3) are reasonably
>> common few of them come ready-compiled for Windows. I've used Ned
>> Batchelder's id3reader [1] successfully for simple tasks so you might try
>> that. On the WMA side, you can automate Windows Media Player to get
>> metadata. (And it might work for .mp3; I've not tried).
>>
>> <code>
>> import win32com.client
>>
>> player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
>> wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
>> try:
>>   artist = wmedia.getItemInfo ("Artist")
>> finally:
>>   player.mediaCollection.remove (wmedia, False)
>>
>> print "bells.mp3 has artist", artist
>>
>> </code>
>>
>> You're going to have to dig around for docs on this one. And it's not
>> pretty. Try starting from:
>>
>> http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>>
>> TJG
>>
>> [1]http://nedbatchelder.com/code/modules/id3reader.html
> 
> Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
> and I just assumed that there must be a way to programmatically get
> the stuff you get from choosing properties in the right click menu.

Ah. You didn't quite say that. Well, the thing is that the stuff in
the right-click menu (I think this is the case) comes from several
different sources. Some of it's held in Alternate
Data Streams. Some is Structured Storage within the docs themselves.
Some is simply, eg, ID3 data held in an MP3 file etc. I don't
think it all comes from one place. Again, I think.

> But I guess there isn't (hard to believe, because I can't see MS hard-
> coding each and every file format's metadata into it's OS). I might
> have to learn more about the command prompt ( I hear there is a module
> for fiddling with it) and work from there.

If you come up with useful info, do post back here. It's an area several
people have enquired about.

TJG


From gherron at islandtraining.com  Thu May 15 12:11:23 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 09:11:23 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
Message-ID: <482C60AB.2060406@islandtraining.com>

Marlin Rowley wrote:
> All:
>
> I've got a script that runs really slow because I'm reading from a 
> stream a byte at a time:
>
> // TERRIBLE
> for y in range( height ):
>         for color in range(4):
>             for x in range( width ):
>                 pixelComponent = fileIO.read(4)
>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE 
> float, but we now can do something with that pixel component.
>
>
> I can speed this up dramatically if I did this:
>
> // MUCH FASTER
> for y in range( height ):
>     for color in range(4):
>        pixelComponent = fileIO.read(4*width) <<<<<<<<<  GET a LOT more 
> data from the stream into memory FIRST!!
>        for x in range( width ):
>            buffer = unpack( ?????? ) <<<< how do I get each float from 
> the pixelComponent???

Just carve of the first four bytes of pixelComponent on each pass 
through the loop, and unpack that.

for x in range(width):
  fourbytes = pixelComponent[:4]   # first 4 bytes
  pixelComponent = pixelComponent[4:]  # All but first four bytes
  buffer = unpack("!f", fourbytes)


There are probably better ways overall, but this directly answers your 
question.

Gary Herron


>
>
> -M
> ------------------------------------------------------------------------
> With Windows Live for mobile, your contacts travel with you. Connect 
> on the go. 
> <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From upton at virginia.edu  Mon May 26 15:03:31 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 15:03:31 -0400
Subject: definition of a highlevel language?
In-Reply-To: <c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>
Message-ID: <5504f9ac0805261203ma4aa57fw3e3a015a950ca315@mail.gmail.com>

On Mon, May 26, 2008 at 2:50 PM, Patrick Mullen <saluk64007 at gmail.com> wrote:
> It basically works like this
>
> low level to high level
>
> machine code
> assembly -> translates to machine code
> c -> compiles to assembly and machine code
> python -> commands interpreted by a vm running on c
>

Alternately, you can think of a pseudo-continuum from low level to
high level, sort of as a function from language lines to assembly
instructions... for instance, I seem to recall reading somewhere that
made the example of BASIC being higher level than C because one
statement in BASIC translated to, on average, 5 assembly instructions,
whereas a C statement translated to, on average, 2.5 assembly
instructions.  Of course, maybe that's not the best metric, because
for instance you might have a comparison between something like Java
and C++ where the individual statement doesn't do any more or less
work (say, creating a new instance of an object), but if you take into
account all of the JVM instructions for intepreting or JITing the
bytecode you'd get a lot higher ratio of assembly instructions to
source statements.


From pataphor at gmail.com  Wed May 21 06:47:44 2008
From: pataphor at gmail.com (pataphor)
Date: Wed, 21 May 2008 12:47:44 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
Message-ID: <20080521124744.17546846@outerspace>

On Tue, 20 May 2008 10:40:17 -0500
"David C. Ullrich" <dullrich at sprynet.com> wrote:

> > > Today's little joke: Long ago I would have solved
> > > this by storing the data as a list of rows and _also_
> > > a list of columns, updating each one any time the
> > > other changed. Just goes to show you things
> > > could always be worse...
> > 
> > Well have I ever ... I only thought about this last week and I
> > actually thought it was a *good* idea. 
> 
> Sorry. If you really want to do this you could keep things
> in sync automatically by writing the appropriate __setitem__
> and resolving never to modify the data except through that...
> 
> def whatever.__setitem__(self, (row,col), value):
>   self.rows[row][col] = value
>   self.cols[col][row] = value
 
Using the trick of encapsulating the values inside single-element lists
one can make a transposition of the matrix and get synchronicity for
the little price of doubling the number of instances. Since the views
share the data this is a lot less expensive than one would think. One
can use the row view or the column view to alter data and the changes
will automatically be visible in the other view, since the views update
the same lists. There is a little notational gotcha, instead of writing
row[0] = [1,2,3] one now must write row[0][:] = [1,2,3] or else
synchronicity is lost.

I found a nice ListMixin class at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440656

Using that I wrote the following proof of concept:

class Storage(ListMixin):

  def __init__(self, seq=[]):
    self.L = [[x] for x in seq] 

  def _constructor(self, iterable):
    return Storage(iterable)

  def __len__(self):
    return len(self.L)

  def _get_element(self, i):
    assert 0 <= i < len(self)
    return self.L[i][0]

  def _set_element(self, i, x):
    assert 0 <= i < len(self)
    self.L[i][0] = x

  def _resize_region(self, start, end, new_size):
    assert 0 <= start <= len(self)
    assert 0 <= end   <= len(self)
    assert start <= end
    self.L[start:end] = [[None] for i in range(new_size)]

def test():
    n = 3
    R = range(n)
    it = iter(range(n*n))
    MR = [Storage(it.next() for i in R) for i in R]
    MC = [Storage() for i in R]
    T = zip(*[x.L for x in MR])
    for x,y in zip(MC,T):
        x.L = y
    print MR
    print MC
    MC[2][:] = 'abc'
    print
    print MR
    print MC
    
if __name__=='__main__':
    test()

Output:

[Storage([0, 1, 2]), Storage([3, 4, 5]), Storage([6, 7, 8])]
[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage([2, 5, 8])]

[Storage([0, 1, 'a']), Storage([3, 4, 'b']), Storage([6, 7, 'c'])]
[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage(['a', 'b', 'c'])]

P.



From castironpi at gmail.com  Mon May 12 21:17:39 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:17:39 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<mailman.1009.1210635712.12834.python-list@python.org>
Message-ID: <eb615397-5400-49dd-a2d6-d94ed2bc0957@c65g2000hsa.googlegroups.com>

Anyway, Chuck's post doesn't question any of the competencies of
computer science.  Is it safe to name-call silly, or have -I- by
disdesign misinterpreted?

On May 12, 6:41?pm, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> I'm another one pretty early in his programming education, but here's my take.
> Python was specifically recommended to me by a few people for a
> specific program I wanted to write (userspace, GUI, music). ?While I
> gradually learn more about it, I start to spend a lot of time on
> certain aspects I don't really need for this task. ?I think curiosity
> is one of the vital qualities for a programmer, and through mine, over
> a few years, I've built up more and more understanding of what's going
> on in my box, more than I set out to have, but I can't see how any of
> this can be called wasted time if it rounds out my general
> understanding.
> On the other hand, as Python is about the second "serious" language
> I've tried to learn (the others being web- or music- oriented, and I
> didn't approach them as programming), I don't have much to compare it
> to. ?I was under the impression before reading your message that
> Python was very popular and useful. ?This list is far more active than
> all the others to which I'm subscribed put together! ?So, either it
> doesn't seem like a silly endeavor to learn it for its own sake, or
> they're using it for something.
>
> If it is a silly endeavor, I'm going to have to ask you to stop this
> thread, it's too silly.
>
> -Chuckk
>
>
>
>
>
> On Mon, May 12, 2008 at 8:27 PM, John Salerno <johnj... at nospamgmail.com> wrote:
> > Just something that crosses my mind every time I delve into "Learning
> > ?Python" each night. Does anyone see any value in learning Python when you
> > ?don't need to for school, work, or any other reason? I mean, sure, there's
> > ?value in learning anything at any time, but for something like a programming
> > ?language, I can't help but feel that I will be mostly unable to use what I
> > ?learn simply because I have no reason to use it.
>
> > ?The *process* of learning is enough fun for me, and every now and then I do
> > ?find a small use for Python that really pays off, but for the most part I'm
> > ?wondering what people's thoughts are as far as simply learning it for the
> > ?sake of learning. Does it seem like a silly endeavor to most people? Did
> > ?anyone here learn a programming language when you didn't need to? If so, how
> > ?much and in what capacity did you use it after you learned it?
>
> > ?Hopefully this question even makes sense!
>
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com- Hide quoted text -
>
> - Show quoted text -



From cokofreedom at gmail.com  Wed May 21 11:22:36 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 08:22:36 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
Message-ID: <06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>

On May 21, 4:57 pm, "inhahe" <inh... at gmail.com> wrote:
> one of the few things i miss from C is being able to use assignment in
> expressions.   that's the only thing, really.
> also there's no switch/case, you have to use a dictionary of functions
> instead, although i rarely need that, usually i just use elif.

One thing I hate from C is the assignment in expressions...Forcing
myself to write
0 == Something
rather than
Something == 0
just to make sure I was mistakenly assigning values in statements is
annoying, it ruins the ease of reading.

I kind of agree with the select:case, but I think a key issue is how
to implement it. Elif is reasonable for now.

Diez, true I guess, but then we haven't seen what these expressions
are, and why there has to be three.


From Avowkind at gmail.com  Wed May 28 17:57:57 2008
From: Avowkind at gmail.com (Avowkind)
Date: Wed, 28 May 2008 14:57:57 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com> 
	<mailman.1695.1211995991.12834.python-list@python.org>
Message-ID: <193563ba-d377-4401-af95-668dbb44034f@q27g2000prf.googlegroups.com>

On May 29, 5:32 am, Stef Mientki <stef.mien... at gmail.com> wrote:
> Avowkind wrote:
> > On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
>
> >> (might not be the right forum for this but...)
>
> >> what is the definition of a highlevel-language?
>
> >> well there isnt one specifically and wikipedia and the like gives just
> >> a very general description obv you can say it abstracts away lowlever
> >> operations.
>
> >> yes but how?
>
> >> a function like map takes a function and applies it to a list for
> >> example.
> >> this abstracts away a common procedure like iterate through a list and
> >> for every position do a computation.
> >> so it is a higherorderfunction. is this how higher-level-languages are
> >> built?
>
> >> so are they fundamentally differently built or is it just a lot of
> >> lowlevel operations built on top of each other?
>
> >> haskell is considered a very highlevellanguage but can you do
> >> systemsprogramming with it(yes maybe it is very unpractical i dont
> >> know but can you)?
>
> >> is lambda calculus a more abstract and efficient way of modeling a
> >> computer? meaning you start at a higher level of abstraction and can
> >> work up to even higher even faster?
>
> >> how did lispmachines work? was the basic system programmed in LISP?
>
> > A lot of the previous comments have been about levels of abstraction
> > of the programming langauge - which may be the answer you want.
> > Another way of looking at it is that we want to be able to move from
> > the language of the solution domain - e.g. computers, bits and bytes
> > to the language of the problem domain.
>
> > When we think about 'level' we don't just want to look at how basic
> > statements work. we also need to think about whether the language is
> > capable of simply and clearly expressing the problem.
>
> > If your problem domain is mathematics then mathcad and its ilk are
> > near perfect high level programming languages as the programs look
> > just like the problems.
>
> Andrew, that's very good description, and I totally agree !> if your problem domain is controlling a water works then you may tend
> > to write your problem like this:
>
> > if the water level is over 10 metres then start pump
> > if the water level is below 5 metres then stop pump
>
> I would go one step beyond that, and state the problem as:
> "keep the reservoir full, but not too full"> which in python might turn out to be
>
> > if water_level > 10:
> >     pump.start()
> > if water_level < 5:
> >     pump.stop()
>
> > which is fairly close.
>
> And now the solution is less close ;-)
> And it becomes even less close,
> if we extend your solution somewhat more to a real world implementation,
> something like this:
>
> control = True
> while control :
>     if water_level > 10:
>         pump.start()
>     if water_level < 5:
>         pump.stop()
>
> And if you would propose this solution to a control system engineer,
> he/she would say: "this solution works very bad" or even "this solution
> won't work"
> A solution that would work, should incorporate at least a hysteresis and
> could look like this:
>
> control = True
> State   = False
> while control :
>   if State and ( water_level > 10 ) :
>     pump.start()
>     State = not ( State )
>   elif not ( State )  and ( water_level < 5 ) :
>     pump.stop()
>     State = not ( State )
>
> and now what's the resemblance to the orginal problem :
>    "keep the reservoir full, but not too full"
> ;-)
>
> So an adequate high level language,
> should do exactly like a control engineer would do (btw I'm not a
> control engineer):
> 1- asking what do you mean by "full"
> 2- not asking what's the other level,
> but asking what's the intended use: how often and how many water is
> added or used,
> what are the costs of the pump, etc etc
> after which
>    the control engineer
>        or
>   the high level language
> can calculate the optimal hysteresis.> of course with the addition of some brackets C++ could be this clear
> > too. The key though is the abstraction given by the pump class and
> > implicitly by object oriented design.
>
> > In this pattern Form designers, visual web page layout tools and their
> > ilk are very high level - but only if your problem is that you need to
> > design a lot of business forms or web pages.  Some problems are best
> > described visually, some in text, some in mathematics.
>
> I agree that some problems are better described in one or the other form,
> but it's not the major issue.
> e.g. Flowcharts are a perfect high level solution for problems in many
> domains.
> But flowcharts, just like computer languages, visual design languages
> and math,
> are only valuable in the hands of domain experts.
>
> What the major issue is,
>     that makes a computer language or a design environment in general,
> really high level,
> is the availability of the domain expertise.
>
> Therefor the only high level language I'm aware of is ...
> ... LabView
>
> Labview offers a lot of domain expertise in almost any domain,
> so anyone
>   with just a little knowledge of the problem domain,
> and
>   with just a little programming experience or math knowledge,
> can solve any problem in every domain with Labview.
> Possibly I'm exaggerating a bit ;-)
>
> cheers,
> Stef
>
> > Andrew.
> > --
> >http://mail.python.org/mailman/listinfo/python-list

creating a short example to illustrate a point is always dangerous :)

<digression>
I chose the pumping station because many years ago I used to do plant
control programs in Forth. One engineer I worked with had described
the requirements in such terms as you give.
e.g keep the tank not too full or empty, but run the pumps at least 4
hours a day.
I considered writing a declarative rule based language to express
this. but on further conversation I found that the engineers already
had a semi formal procedural notation used for manual instructions
which it was very easy to adapt Forth to parse.

Forth's defining words allowing the creation of new language
constructs always made writing domain specific programs easy.

I mention this as, having been writing C++ for 15 years since those
days. Python is the first new language that I really feel comfortable
with and that carries that same feeling of expressiveness.

</digression>






From xahlee at gmail.com  Wed May  7 19:13:36 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Wed, 7 May 2008 16:13:36 -0700 (PDT)
Subject: The Importance of Terminology's Quality
Message-ID: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>

I'd like to introduce a blog post by Stephen Wolfram, on the design
process of Mathematica. In particular, he touches on the importance of
naming of functions.

? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
Wolfram
 http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/

The issue is fitting here today, in our discussion of ?closure?
terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
meaning space vs single-meaning space), ?tail recursion?, ?currying?,
?lambda?, that perennially crop up here and elsewhere in computer
language forums in wild misunderstanding and brouhaha.

The functions in Mathematica, are usually very well-name, in contrast
to most other computing languages. In particular, the naming in
Mathematica, as Stephen Wolfram implied in his blog above, takes the
perspective of naming by capturing the essense, or mathematical
essence, of the keyword in question. (as opposed to, naming it
according to convention, which often came from historical happenings)
When a thing is well-named from the perspective of what it actually
?mathematically? is, as opposed to historical developments, it avoids
vast amount of potential confusion.

Let me give a few example.

? ?lambda?, widely used as a keyword in functional languages, is named
just ?Function? in Mathematica. The ?lambda? happend to be called so
in the field of symbolic logic, is due to use of the greek letter
lambda ??? by happenstance. The word does not convey what it means.
While, the name ?Function?, stands for the mathematical concept of
?function? as is.

? Module, Block, in Mathematica is in lisp's various ?let*?. The
lisp's keywords ?let?, is based on the English word ?let?. That word
is one of the English word with multitudes of meanings. If you look up
its definition in a dictionary, you'll see that it means many
disparate things. One of them, as in ?let's go?, has the meaning of
?permit; to cause to; allow?. This meaning is rather vague from a
mathematical sense. Mathematica's choice of Module, Block, is based on
the idea that it builds a self-contained segment of code. (however,
the choice of Block as keyword here isn't perfect, since the word also
has meanings like ?obstruct; jam?)

? Functions that takes elements out of list are variously named First,
Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
?unshift?, in lisps and perl and other langs.

The above are some examples. The thing to note is that, Mathematica's
choices are often such that the word stands for the meaning themselves
in some logical and independent way as much as possible, without
having dependent on a particular computer science field's context or
history. One easy way to confirm this, is taking a keyword and ask a
wide audience, who doesn't know about the language or even unfamiliar
of computer programing, to guess what it means. The wide audience can
be made up of mathematicians, scientists, engineers, programers,
laymen. This general audience, are more likely to guess correctly what
Mathematica's keyword is meant in the language, than the the name used
in other computer languages who's naming choices goes by convention or
context.

(for example, Perl's naming heavily relies on unix culture (grep,
pipe, hash...), while functional lang's namings are typically heavily
based on the field of mathematical logic (e.g. lambda, currying,
closure, monad, ...). Lisp's cons, car, cdr, are based on computer
hardware (this particular naming, caused a major damage to the lisp
language to this day). (Other examples: pop, shift are based on
computer science jargon of ?stack?. Grep is from Global Regular
Expression Print, while Regular Expression is from theoretical
computer science of Automata... The name regex has done major hidden
damage to the computing industry, in the sense that if it have just
called it ?string patterns?, then a lot explanations, literatures,
confusions, would have been avoided.))

(Note: Keywords or functions in Mathematica are not necessarily always
best named. Nor are there always one absolute choice as best, as there
are many other considerations, such as the force of wide existing
convention, the context where the function are used, brevity,
limitations of English language, different scientific context (e.g.
math, physics, engineering), or even human preferences.)

----------------------------

Many of the issues regarding the importance and effects of
terminology's quality, i've wrote about since about 2000. Here are the
relevant essays:

? Jargons of Info Tech Industry
 http://xahlee.org/UnixResource_dir/writ/jargons.html

? The Jargon ?Lisp1? vs ?Lisp2?
 http://xahlee.org/emacs/lisp1_vs_lisp2.html

? The Term Curring In Computer Science
 http://xahlee.org/UnixResource_dir/writ/currying.html

? What Is Closure In A Programing Language
 http://xahlee.org/UnixResource_dir/writ/closure.html

? What are OOP's Jargons and Complexities
 http://xahlee.org/Periodic_dosage_dir/t2/oop.html

? Sun Microsystem's abuse of term ?API? and ?Interface?
 http://xahlee.org/java-a-day/interface.html

? Math Terminology and Naming of Things
 http://xahlee.org/cmaci/notation/math_namings.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From __peter__ at web.de  Sun May 25 06:38:11 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 25 May 2008 12:38:11 +0200
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
Message-ID: <g1bfih$b3i$01$1@news.t-online.com>

Ulrich Dorda wrote:

> I've got a probably embarrassing trivial problem with namespaces, but
> couldn't solve it myself nor find an answer in the net. Hopefully one of
> you guys can help me.
> 
> What I want to do:
> Use the interactive shell and e.g define the variable a there.
> Then load a module and access a from within.
> 
> e.g file "utest.py"
> 
> def doit():
> print 2*a
> 
> in the shell:
> 
> import utest
> a=3
> utest.doit()  <- I want this to print 2*a, but of course obtain: <type
> exceptions.NameError'>: global name 'a' is not defined
> 
> Any change I do to a in the shell should be seen from the doit() function,
> any variable assignment I do in the doit() function should be seen in the
> shell. I guess it's somehow a namespace sharing.
> 
> Actually the function doit() will contain an eval() function that should
> evaluate a (via a gui) dynamically inserted expression.
> 
> Any one got a clue? (a clue what I try to say and how to help?!)
> 
> Thanks a lot in advance!!

While the sane approach to this is

def doit(a):
    print 2 * a

here is an insane one:

import sys

def f(): pass
function = type(f)

def snatch_globals(f):
    def g(*args, **kw):
        return function(f.func_code, sys._getframe(1).f_globals)(*args,
**kw)
    return g

@snatch_globals
def doit():
    print 2 * a

Peter


From wuwei23 at gmail.com  Sat May 17 04:36:37 2008
From: wuwei23 at gmail.com (alex23)
Date: Sat, 17 May 2008 01:36:37 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>
Message-ID: <eafc98c5-2f09-4795-a607-140b20a0b2cc@c19g2000prf.googlegroups.com>

On May 17, 7:29 am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> What about *READING THAT FUCKING MANUAL* ?

I don't think he has the time.

> Now : it's not the first time - in a couple days - that you ask a
> question that you wouldn't have asked if you had taken a couple
> minutes doing the tutorial and/or reading the doc.

It's not just here, either. He's been posting similar low-level
questions to groups on lisp, ruby, haskell, javascript, prolog, scheme
and smalltalk. Either he's crowd-sourcing his learning, needs some
serious medication for his ADD, or is just taking the piss.

Over the past couple of months, the idiots have really taken over this
group.

- alex23


From paul at boddie.org.uk  Wed May  7 19:09:07 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 16:09:07 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
	<6b6e0eec-a570-4a58-8c8b-72e1cf23d9d7@a1g2000hsb.googlegroups.com>
Message-ID: <621f79a4-3862-40ae-beb8-e6f11e3a2006@w7g2000hsa.googlegroups.com>

On 7 Mai, 19:57, Carl Banks <pavlovevide... at gmail.com> wrote:
>
> That IBM and other companies are involved with Linux is an example of
> companies that are willing to get involved with GPL; it says nothing
> about whether those companies would be more, less, or un- willing to
> also get involved with more permissive licenses.

Sure, but you have to wonder why IBM invested so heavily in Linux when
there were at least three different free and mature variants of BSD
"Unix" that certain parties regarded more favourably for commercial
usage at that time. It's possible to claim now that Linux is more
attractive than a number of permissively licensed solutions for
reasons of familiarity and community size, not licensing, but that may
not have been a compelling case back when IBM decided to invest in
Linux.

> IBM is also involved with Apache, which does have a permissive
> license.

I've seen other companies using Apache, too, but I've been far from
impressed by their enhancements (which have been proprietary, if I
recall correctly). One could argue that such companies see little
point in contributing their work to the community, perhaps fearing the
supposed advantage that their enhancements bring, yet simultaneously
fail to take advantage of the improvements the community can provide.

Paul


From vivainio at gmail.com  Mon May  5 14:26:17 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:26:17 GMT
Subject: ]ANN[ Vellum 0.16:  Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <ve1szjy2.fsf@gmail.com>

"Zed A. Shaw" <zedshaw at zedshaw.com> writes:

> GPLv3?
>
> How do people feel about Vellum's GPLv3 status?  It actually doesn't
> impact anyone unless you embed Vellum into a project/product or you

Yeah, but it effectively prevents people from embedding it into their
apps that wish to remain BSD/MIT clean.

It's not likely that some evil corporation is going to hijack Vellum
source code as a basis of their next evil app (which is basically what
GPL is used to prevent) any time soon, so I don't really see a
particular reason for such a developer-oriented tool to be released
under GPL.

Basically, avoiding GPL maximizes the brainshare that a small-ish tool
is going to attract, and many (including myself, FWIW) view GPL as a
big turn-off when I consider spending some time to familiarize myself
with a tool, or recommending it to someone else.



From jamesd at echeque.com  Tue May 20 00:00:19 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 14:00:19 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<pan.2008.05.20.00.58.50.596857@reidster.net>
Message-ID: <1fi434dog4u92tk7na5qhvfapl70mg8d93@4ax.com>

> > 2.  It is not clear to me how a python web application scales.  Python
> > is inherently single threaded, so one will need lots of python
> > processes on lots of computers, with the database software handling
> > parallel accesses to the same or related data.  One could organize it
> > as one python program for each url, and one python process for each
> > http request, but that involves a lot of overhead starting up and
> > shutting down python processes.  Or one could organize it as one
> > python program for each url, but if one gets a lot of http requests
> > for one url, a small number of python processes will each sequentially
> > handle a large number of those requests.  What I am really asking is:
> > Are there python web frameworks that scale with hardware and how do
> > they handle scaling?

Reid Priedhorsky 
> This sounds like a good match for Apache with mod_python.

I would hope that it is, but the question that I would like to know is
how does mod_python handle the problem - how do python programs and
processes relate to web pages and http requests when one is using
mod_python, and what happens when one has quite a lot of web pages and
a very large number of http requests?
--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From larry.bates at websafe.com`  Fri May 16 11:21:11 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 10:21:11 -0500
Subject: Cookies and CookieJar
Message-ID: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>

I'm struggling with a project using mechanize and cookies to screen scape a 
website.  The site requires a client created cookie for authentication.  Below 
is the code I'm attempting to use with the traceback I'm getting:



 >>> import Cookie
 >>> c=Cookie.SimpleCookie()
 >>> c["Manageopen"]="cards"
 >>> c['Manageopen']['expires'] = 0
 >>> c['Manageopen']['path'] = "/"
 >>> c['Manageopen']['domain'] = ".domain.com"
 >>> c['Manageopen']['secure'] = ""
 >>> c.output()
'Set-Cookie: Manageopen=cards; Domain=.domain.com; expires=Fri, 16-May-2008 
14:06:00 GMT; Path=/'
 >>> import cookielib
 >>> cj=cookielib.CookieJar()
 >>> cj.set_cookie(c)
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
   File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
     if cookie.domain not in c: c[cookie.domain] = {}
AttributeError: 'SimpleCookie' object has no attribute 'domain'
 >>>

I also tried:

 >>> cj.set_cookie(c["Manageopen"])
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
   File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
     if cookie.domain not in c: c[cookie.domain] = {}
AttributeError: 'Morsel' object has no attribute 'domain'


I've looked at everything I can find via Google and nothing seems to help.

Thanks in advance.

Regards,
Larry


From banibrata.dutta at gmail.com  Tue May  6 04:35:25 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 14:05:25 +0530
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
Message-ID: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>

On 5/6/08, andrej.panjkov at climatechange.qld.gov.au
<andrej.panjkov at climatechange.qld.gov.au> wrote:
> At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
> other unixy OSes.
>
> We have python installed in a number of different places:
> /bin/python
> /usr/local/bin/python
> /usr/bin/python
> /opt/freeware/Python/Python-2.5.1/bin/python
> ~mataap/platform/python/python-2.5.1
>
> So I cannot assume a single location for python.  Nor for any other
> tool, really.  Bash for example.  It may indeed be in /usr/bin on many
> systems, on many others it is not.
>
> Note the version specific install points.  This allows us to switch
> over easily to different versions, and keep older versions in case
> they are needed.  We can test new versions before cutting over to them
> operationally. (This matters for tools that are still changing, like
> python or bash.)
>
> We use the very handy 'modules' package (not python modules, not
> fortran modules) to adjust our paths and environment variables as
> needed.
>
> Some of the install points are determined by policy, or historical
> constraints, or hardware limits, or file system layout.
>
> Now it is true that it is easy to edit a single script to change the
> hashbang line.  It is not easy to change several hundred scripts, on
> different machines.  It is easy to adjust the environment to point to
> the right python path, and have all your scripts pick it up
> automatically.

Looks reasonable thing to do...

>
> Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.

So why not put symlink to Python over there on all machines, if we can
put one (or env itself) there ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta


From amit.uttam at gmail.com  Mon May 19 16:58:28 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Mon, 19 May 2008 13:58:28 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
Message-ID: <60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>

On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> amit.ut... at gmail.com writes:
> > I've recently jumped big time into python and I'm working on a
> > software program for testing automation.
>
> Welcome, to both fields :-)
>

Thanks! I am having a great time learning and coding in python. It's
an amazing programming language.

> > I had a question about proper logging of output. What I would like
> > is:
>
> >  1. a function syslog (to log output to log file only)
> >  2. a function stdout (to log output to stdout only)
> >  3. a function sslog (to log output to both log and stdout)
>
> > Right now I am using StandOut module
>
> Have you investigated the 'logging' module in the Python standard
> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> to meet your listed requirements, without need of external
> dependencies.

Hmm..Yeah I didn't realize python had its own standard logging
facility. I took a look at it and it seems to do the job. However, the
output seems to be syslog style output. In the program I am writing,
the log file stores all the output of the commands being run (e.g. tcl
scripts, etc). Will this be possible using the built in python logging
module?

Thanks,
Amit


From castironpi at gmail.com  Wed May  7 00:36:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 21:36:00 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com> 
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com> 
	<6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>
Message-ID: <f828b142-e9f0-4629-ae83-52b3263a8cfd@24g2000hsh.googlegroups.com>

On May 6, 10:03?am, Aaron Watters <aaron.watt... at gmail.com> wrote:
> I'm having trouble following your discussion
> and I suspect you might be a friend of Mark V Cheney.
> But I will focus on this one point.
>
> On May 5, 11:14 pm, castiro... at gmail.com wrote:
>
> > If recursive generators are really useless (erect wall might not be),
>
> I would like to have recursive generators --
> for example to be able to traverse a tree
> and yield the value at every node. ?Right now
> to do this you need to build a chain of generators
> from each leaf to the root of the tree (or avoid
> recursion by managing your own stack of nodes).
> Every yield must "bubble up the tree".
>
> With stackless Python you create the equivalent
> of a "recursive generator" by using channels
> -- and you can do a lot of other cool stuff with
> channels too. ?The "yield" (which doesn't even
> require a special keyword ;) ) goes directly to
> the other endpoint of the channel, with no bubbling.
> It's too bad the Python that comes
> installed on Macs doesn't support channels :(.
>
> I know I didn't address your question or comments...
> ? -- Aaron Watters
>
> ====http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=ifdef+stackless

Just talking is fine.  (There's an intellectual moment of a group and
thread, which is fine and even fine to measure.)

You may be limiting your target audience to those who have engaged in
intellectual pursuits in computer science.  I may too.

My favorites to generate are "carfulls" of people, which compose
pretty broadly.  I can do roads, traffic, scheduling, etc., and I'd
like to install microrail.  Genetic searches for useful structures
show promise.  But my community has basic needs met: food and hot
running water.  Going more places does not improve quality of life,
nor does going more often.  Art is not very pretty, or for long, and
the art of motion has always been dance.  What generators run, how
often or when, in a good process?

I think feedback is important: if a computer can tell you what you
just said, say with keyboard metrics or recognition, you may get more
choice, and higher quality.

FTR, I am mostly staying off paper and on flash.  If you have a
computer, I'll probably try to set up a tron.py server-- bet it's a
screenful.


From aahz at pythoncraft.com  Wed May 21 14:41:00 2008
From: aahz at pythoncraft.com (Aahz)
Date: 21 May 2008 11:41:00 -0700
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
Message-ID: <g11qbs$lak$1@panix3.panix.com>

In article <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442 at 56g2000hsm.googlegroups.com>,
Alex  <metallourlante at gmail.com> wrote:
>
>In order to understand the concept of threading pool in python I'm
>working on a simple single-site web crawler.

You can also compare your code against
http://www.pythoncraft.com/OSCON2001/ThreadPoolSpider.py  
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From exarkun at divmod.com  Tue May 13 16:16:13 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 16:16:13 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <da09c7d6-78ff-49fa-b1d5-d085256fe5e7@59g2000hsb.googlegroups.com>
Message-ID: <20080513201613.6859.1175062222.divmod.quotient.63033@ohm>

On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
>> We do not live in a pure world, Python isn't pure (practicality beats
>> purity), and by attempting to send some data each time a .push*()
>> method is called, there are measurable increases in transfer rates.
>
>Good point. I'd like to ask a question: if we'd have a default
>asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
>such problem?
>I've always found weird that asyncore has such an high default timeout
>value.
>Twisted, for example, uses a default of 0.01 ms for all its reactors.

I'm not sure this is right.  What timeout are we talking about?  Twisted
only wakes up when necessary.

Jean-Paul


From arnodel at googlemail.com  Mon May 26 03:58:28 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 08:58:28 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
Message-ID: <m2lk1x5wez.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
>> > We can use any operation or function which
>> > takes and returns sets.
>>
>> I think the problem is significantly underspecified. It would be a more
>> interesting problem if there was a restriction to a few selected set
>> operations, e.g. union, intersection, difference, and combinations
>> thereof.
>
> Ok, that's quite right -- when I just tried to define "any function,"
> I found that all the solutions I came up with were combinations of the
> set operations defined for immutable sets. Let me improve the spec as
> the following:
>
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...), arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any of python's set operations
> or combination of those operations.

OK then, if you only allow union, intersection, difference, symmetric
difference then I think it would be easy to prove (I haven't done it!)
that if there is a solution to you problem, then the method below
yields a solution:

*** warning: all this is untested AND written in a rush ***

let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)


# X is the "domain", C is the set of complements in X of elements of S

X = reduce(set.union, S)
C = set(X - s for s in S)


# Find the "fibers" at each element x of s0.  A fiber at x is the set
# of all s in S or C that contain x

from collections import defaultdict
fibers = defaultdict(list)

for s in S | C:
    for x in s & s0:
        fibers[x].append(s)


# Find the "seeds" at each x in s0.  A seed at x is the set of all
# elements contained in all s in the fiber at x.

# Intutively, a seed at x is the smallest set containing x that can be
# built from S

seeds = [reduce(set.intersection, F) for F in fibers.itervalues()]


# Now we know if there is a solution:

sol = reduce(set.union, seeds)

if sol != s0:
    print "No solution"
else:
    print "Solution: union(intersection(fibers[x]) for x in s0)"


I think this solution will be found in O(m*n**2) time, where:

* n is the size of X (i.e. the total number of elements)
* m is the size of S (i.e. the total number of sets)

and assuming that set operations are linear.

-- 
Arnaud


From python at bc90021.net  Sun May 11 13:55:15 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:55:15 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
Message-ID: <7qGVj.32505$KJ1.18416@newsfe19.lga>

On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:

> bc90021 <python at bc90021.net> writes:
> 
>> Hi All,
>>
>> Thanks in advance for any and all help!
>>
>> I have this code:
>>
>> g = open(fileName, 'a')
>>
>> where fileName is defined before the line it's used in.  It works fine
>> when I use it outside a thread class.
>>
>> When I put the same line in a thread class, it no longer works, and I
>> get an error:
>>
>> IOError: [Errno 2] no such file u'fileName'
>>
>>
> It's telling you that you haven't got a file called 'fileName'. Posting
> the code that triggers this error would allow people to diagnose the
> error accurately rather than guessing.

f = open(otherFile).readlines()
for i in len(f):
	for c in range(0,24,1):
		if os.name == "posix":
			tempfileName = "\"proctemp/" + self.matrix[c][0] 
+ "_tmp_" + fileName + ".txt\""
   	if re.search(f[i], pattern):
		g = open(tempfileName, 'a')
		g.write(f[i])


This code works *perfectly* unless I put it in a class that inherits from 
threading.Thread.  In the thread class, everything works (I can see the 
"c" value, and I can print out each line in "f[i]", it's just that the g 
= open line doesn't work.





From bj_666 at gmx.net  Fri May 23 01:48:51 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 05:48:51 GMT
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
Message-ID: <69n463F33hfhfU2@mid.uni-berlin.de>

On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:

> Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> exception like this:
> 
> Traceback (most recent call last):
>   File "<pyshell#18>", line 1, in <module>
>     myDLL.myFUNCT()
>   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
>     func = self.__getitem__(name)
>   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
>     func = self._FuncPtr((name_or_ordinal, self))
> AttributeError: function 'myFUNCT' not found

Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
chance you compiled your C as C++ and name mangling kicked in?

Can you show a minimal C source for a DLL, how you compiled it, what you
did on the Python side to call it, and how it fails?

Ciao,
	Marc 'BlackJack' Rintsch


From wojtek.gminick.walczak at gmail.com  Mon May  5 08:10:59 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Mon, 5 May 2008 14:10:59 +0200
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <2c3c21060805050510x11ff4f68oc78540969a029478@mail.gmail.com>

2008/5/5, globalrev <skanemupp at yahoo.se>:
> class Foo(object):
>         def Hello(self):
>                 print "hi"
>
>  object is purple, ie some sort of reserved word.
>
>  why is self in black(ie a normal word) when it has special powers.
>  replacing it with sel for example will cause an error when calling
>  Hello.

Could you give an example of such an error?

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From __peter__ at web.de  Fri May 16 05:26:55 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 11:26:55 +0200
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <g0jk0v$coa$01$1@news.t-online.com>

?? wrote:

>     I wonder why below does not work.
> 
> a = object()
> a.b = 1        # dynamic bind attribute failed...

The implementation of slots depends on that behaviour:

http://docs.python.org/ref/slots.html

> Does this strange behavior break the LSP (Liskov substitution principle)?

Can you expand on that?

Peter


From stefan_ml at behnel.de  Fri May 16 05:47:03 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 16 May 2008 11:47:03 +0200
Subject: ElementTree and DTDs
In-Reply-To: <17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>
References: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>
	<17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>
Message-ID: <482D5817.9030107@behnel.de>

J. Pablo Fern?ndez wrote:
> Is ElementTree supposed to load DTDs?

AFAIR, you have to provide entities by hand.


> Or is there another library that would handle DTDs correctly,
> performing entity replacements?

http://codespeak.net/lxml
http://codespeak.net/lxml/parsing.html#parser-options

Stefan


From kyosohma at gmail.com  Fri May 16 09:17:00 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:17:00 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<mailman.1204.1210901120.12834.python-list@python.org>
Message-ID: <7ca5661b-7e20-4328-8450-65b2c6fc5c7a@k13g2000hse.googlegroups.com>

On May 15, 8:24?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 15 May 2008 12:13:56 -0300, Mike Driscoll <kyoso... at gmail.com> ?
> escribi?:
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> Try this different approach, using the IShellLink interface:http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/pywin32/win32c...
>
> --
> Gabriel Genellina

Thanks Gabriel...it looks a little overwhelming, but I'll file it away
for future reference.

Mike


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 06:24:41 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 12:24:41 +0200
Subject: Newbie In Python
In-Reply-To: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <4832a6e3$0$28693$426a74cc@news.free.fr>

andrew.smith.cpp at gmail.com a ?crit :
> I have Heard About "Python" its a OOD Language. 

'OOD' => 'object oriented ???' ?

> i have to Learn it
> where from i should start it.

Err... What about reading the docs on python.org - possibly starting 
with the tutorial:
http://docs.python.org/tut/tut.html

You'll find other tutorial etc here:
http://www.python.org/doc/


> i have python compiler

Just for the record, "python" is also the name of a compiler for CMU 
Common Lisp (totally unrelated to the Python language), so make sure 
that what you have is the CPython language install.

HTH


From mensanator at aol.com  Thu May 22 12:56:41 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 22 May 2008 09:56:41 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>

On May 22, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > ?But after getting input from children and teachers, etc, it started
> > ?feeling right.
>
> > ?For example, consider the two statements:
>
> > ? ? ? x = 8
> > ? ? ? x = 10
>
> > ?The reaction from most math teachers (and kids) was "one of those is
> > ?wrong because x can't equal 2 different things at the same time".
>
> This is a common feature in functional languages...
>
> Eg
>
> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> [async-threads:0] [kernel-poll:false]
>
> Eshell V5.6.2 ?(abort with ^G)
> 1> X = 8.
> 8
> 2> X = 10.
> ** exception error: no match of right hand side value 10
> 3>
>
> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...

Are you saying that erlang treats 1> as an assignment, yet
treats 2> as a comparison?

That's inconsistent. No wonder nobody uses erlang.

Why isn't erlang smart, like Python, and avoid such confusion?

IDLE 1.2
>>> X = 2**3   # assignment
>>> X == 8     # comparison
True
>>> X == 10
False
>>>

>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick



From nicolas.dandrimont at gmail.com  Thu May  8 19:10:46 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Fri, 9 May 2008 01:10:46 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <20080508231046.GA21873@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-08 15:54:42 -0700]:

> Have a look at this:
> 
> >>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 

And why is this a problem ? It is the "standard" operator precedence 
that -123^0 is -(123^0), isn't it ?

> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 

That's what it does : 

>>> -123**0
-1
>>> (-123)**0
1

> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.

Again, the mathematical result is correct. -123^0 is -(123^0), not
(-123)^0.

Regards,
-- 
Nicolas Dandrimont

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From ivan.illarionov at gmail.com  Tue May 20 04:32:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:32:32 +0000 (UTC)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
Message-ID: <g0u2b0$1fec$2@news.mtu.ru>

On Mon, 19 May 2008 08:53:11 -0700, Henrique Dante de Almeida wrote:

> On May 19, 6:52?am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Henrique Dante de Almeida a ?crit :
>>
>> > On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
>> >> Hello.
>>
>> (snip)
>> >> However, it is usually said that Python is not a compiled but
>> >> interpreted programming language ?I mean, it is not like C, in that
>> >> sense.
>>
>> (snip)
>> > ?I guess that python is not a good language for that.
>> (snip)
>> > ?My opinion: choose compiled or byte compiled languages.
>>
>> Slightly OT (ie : not talking about computation-heavy alorgithm being
>> better implemented in C then wrapped in Python - this seems quite
>> obvious) but just a couple facts:
>>
>> 1/ being interpreted or compiled (for whatever definition of these
>> terms) is not a property of a language, but a property of an
>> implementation of a language.
>>
>> 2/ actually, all known Python implementations compile to byte-code.
> 
>  Yes, I was actually referring to statically typed JIT-compiled
> languages. Sorry about that, blame the beers that entered my digestive
> system that night. :-P

[beer.blame() for beer in beers]

if len(beers) > 2:
    news_reader.stop_working()

:-)


From yves at zioup.com  Wed May 14 20:23:26 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 15 May 2008 00:23:26 GMT
Subject: How to subclass file
Message-ID: <2oLWj.137678$rd2.90955@pd7urf3no>

I want to create a subclass of 'file' but need to open the file with os.open
(because I want to open it in exclusive mode), and need an additional method.

Because I need an additional method, I truly need a object of my sublass.
If I do something like

class myFile(file):

  def __new__(cls, filename):
    import os
    fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
 
    return os.fdoen(fd, 'w')

  def myMethod(self):
    do_something


then x = myFile('somefilename') is of type file, not myFile, and therefore
does not have myMethod as a valid method.

Now if I try:

class myFile(file):

  def __new__(cls, filename):
    import os
    fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)

    obj = file.__new__(cls)
 
    return obj

  def myMethod(self):
    do_something

Then it fails, because the 'file' constructor needs a filename. I can provide
the filename, but it will then try to re-open that file, and even if I did
manage to create an object file, how do I connect the file descriptor created
by os.open to my object ?


Thanks.


Yves.
http://www.SollerS.ca



From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:33:55 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:33:55 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <mailman.1338.1211191540.12834.python-list@python.org>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>	<48314dd0$0$32138$426a34cc@news.free.fr>
	<mailman.1338.1211191540.12834.python-list@python.org>
Message-ID: <48315792$0$27846$426a74cc@news.free.fr>

Tim Golden a ?crit :
> Bruno Desthuilliers wrote:
>> 2/ actually, all known Python implementations compile to byte-code.
> 
> In curiosity, did your "actually" mean, in the French sense, "at the 
> moment" or, in the English sense, "in contrast to something stated 
> earlier"? Or maybe both?

I mainly intented it to be understood in the English sense - but taking 
it the French way would be ok too.


From johnjsal at NOSPAMgmail.com  Sun May 18 18:20:22 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 18 May 2008 18:20:22 -0400
Subject: How do *you* use Python in non-GUI work?
Message-ID: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>

Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)

Thanks.


From sven.siegmund at gmail.com  Sun May 11 18:36:22 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:36:22 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <845f3e49-14ef-43dd-8cc9-806f1f50690c@59g2000hsb.googlegroups.com>

> I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
> can:

Oh I see the posts in this newsgroup do not yet support Unicode. Most
of the special characters in my source code have been messed up. But
anyway, those who know Czech can handle it. The error is replicable
even with the messed-up characters.

S.


From banibrata.dutta at gmail.com  Mon May 12 02:45:06 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 12:15:06 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <4827E6B9.3080509@shopzeus.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
Message-ID: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>

On 5/12/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>
> Banibrata Dutta ?rta:
>
>> Hi,
>>  Again a noob question.
>>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
>> correct to conclude that there is no RDBMS agnostic, single/uniform DB
>> access API for Python ?
>> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>>  How is the RDBMS change handled for solutions which need to work with
>> different RDBMSs ??
>>
> http://www.python.org/dev/peps/pep-0249/
>


That appears to be only an API specification. Are there any implementations
of that ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From zapwireDASHgroups at yahoo.com  Tue May 27 16:48:33 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:48:33 -0700
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>
Message-ID: <Is__j.39066$dq6.8748@en-nntp-09.dc1.easynews.com>

"Paul Hankin" <paul.hankin at gmail.com> wrote in message 
news:0ea08237-c9f9-441b-a744-7410114b5ae9 at t54g2000hsg.googlegroups.com...
"Did you actually write self,args = args?"

(looks at source code)

$#@#%#$  Why, yes, yes I did!  Thanks for catching that...




From aal3beer at gmail.com  Tue May 27 01:47:56 2008
From: aal3beer at gmail.com (hotset)
Date: Mon, 26 May 2008 22:47:56 -0700 (PDT)
Subject: =?windows-1252?Q?ICDL_Exam_Cram=99_2_=2D_Syllabus_4=2E0?=
Message-ID: <7756fe80-ca16-4894-bbda-d6532a4d6bad@d45g2000hsc.googlegroups.com>

http://www.al3beer.com/vb/showthread.php?t=9179


From bignose+hates-spam at benfinney.id.au  Fri May  2 01:48:48 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 15:48:48 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
Message-ID: <871w4l1cjj.fsf@benfinney.id.au>

Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> writes:

> -On [20080502 05:26], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
> >I've never clearly understood why people want to use "#!
> >/usr/bin/env python", which is prone to finding a different Python
> >from the one installed by the operating system. I'd be interested
> >to see what responses are in favour of it, and what the reasoning
> >is.
> 
> Simple, some systems are not as peculiar as a lot of Linux boxes
> which chug everything into /usr/bin, which is OS territory (as has
> been decreed long ago by hier(7)), but rather use /usr/local/bin
> (all BSD Unix and derivatives) or /opt or whatever convention a
> particular operating system has.

To my mind, the Python interpreter installed by a package as
distributed with the OS *is* OS territory and belongs in /usr/bin/.

> As such, your script with #!/usr/bin/python is as bad as an ash
> shell script with #!/bin/bash.

Clearly if the program is written to be interpreted by the Ash shell,
it should not declare Bash as the interpreter.

I don't see how declaring Python as the interpreter for a Python
program is supposed to be "as bad" as that.

-- 
 \     "Don't be afraid of missing opportunities. Behind every failure |
  `\      is an opportunity somebody wishes they had missed."  -- Jane |
_o__)                                          Wagner, via Lily Tomlin |
Ben Finney


From bj_666 at gmx.net  Fri May  2 07:19:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 11:19:55 GMT
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
Message-ID: <680bmrF2r409aU4@mid.uni-berlin.de>

On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:

> I have a comma delimited file that is separated by comma's, and then
> sometimes by ","
> 
> c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
> 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
> c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
> 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
> c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
> 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "

The items are always delimited by commas but some items themselves contain
a comma and therefore are enclosed in double quotes.  So it's not
inconsistent.

> How do I convert that line into a list?

Use the `csv` module in the standard library.

Ciao,
	Marc 'BlackJack' Rintsch


From davidj411 at gmail.com  Sat May 24 14:13:12 2008
From: davidj411 at gmail.com (David Jackson)
Date: Sat, 24 May 2008 14:13:12 -0400
Subject: csv iterator question
In-Reply-To: <48374E86.9040901@admailinc.com>
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
	<48374E86.9040901@admailinc.com>
Message-ID: <491b0d8f0805241113m25cbc7c6u8bc1fa4b56ed712a@mail.gmail.com>

Thanks, Ethan. that was a great solution. i just tested it.


On Fri, May 23, 2008 at 7:08 PM, Ethan Furman <efurman at admailinc.com> wrote:

> davidj411 wrote:
>
>  When you save an open file to a variable, you can re-use that variable
>> for membership checking.
>> it does not seem to be that way with the csv.reader function, even
>> when set to a variable name.
>>
>> what is the best way to store the open CSV file in memory or do i need
>> to open the file each time?
>>
>> example of open method on file object:
>> fhandle=open(filename).readelines()
>>
>>
> >>> fhandle = open('c:/temp/08-02024.csv').readlines()
> >>> type(fhandle)
> <type 'list'>
> >>> len(fhandle)
> 381
>
> fhandle is a list containing the contents of the file, not a file handle --
> that's why you can easily re-use it.
>
>  example of csv.reader method:
>> reader = csv.reader(open(csvfilename))
>>
>>
> Try this instead:
> >>>reader  = csv.reader(open('c:/temp/08-02024.csv'))
> >>> contents = [line for line in reader]
> >>> type(contents)
> <type 'list'>
> >>> len(contents)
> 381
>
> You still get a list that you can easily use, that has gone through the csv
> routines.
>
> Hope this helps.
> --
> Ethan
>
>
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From bj_666 at gmx.net  Sun May 18 05:31:54 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 18 May 2008 09:31:54 GMT
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<482FF39A.5010604@v.loewis.de>
Message-ID: <69abcaF30gaveU1@mid.uni-berlin.de>

On Sun, 18 May 2008 11:15:06 +0200, Martin v. L?wis wrote:

>> Full day later, I think it, to emphasize state, would prioritize
>> context.  The reason for the huge ramble was, believe it or not,
>> namespace conflict... as though any other states around here might
>> nose in.
> 
> I think the namespace conflict is rather in cities than in states.
> For example, there are several cities called "Berlin", but only
> one state (that I know of) is called "Mecklenburg-Vorpommern".
> In some cases, prefixing helps, e.g. you don't call it "York"
> when that already exists, but "New York".

The state or the city "New York"!?  And wasn't the city object bound to
the name "New Amsterdam" once?  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From parag_paul at hotmail.com  Wed May  7 10:08:12 2008
From: parag_paul at hotmail.com (parag_paul at hotmail.com)
Date: Wed, 7 May 2008 07:08:12 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
Message-ID: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>

hi All,
I have no idea why I need to learn a new scripting language,
nothing much to the sytnax,
I need to understand what could be the prupose of another scripting
language

Cna you please help me with this,
Is there a possibilty to work on bigger projects with Python


From pavlovevidence at gmail.com  Tue May 13 17:59:16 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 14:59:16 -0700 (PDT)
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
Message-ID: <87f5fa41-d053-4b15-8b3c-66d83169cddd@27g2000hsf.googlegroups.com>

On May 13, 3:27 pm, globalrev <skanem... at yahoo.se> wrote:
> i cant figure outif python has lexical or general scope.
>
> it seems functions have lexical scope but with some restrictions and

Yes.  (You can't modify a local variable from an inner scope--this
will change in Python 3.0.)

> some non-function scopes are dynamic?

No: I presume you mean the class statement, which is the only thing
other than def that introduces a scope in Python, but it's neither
dynamic nor lexical.  In fact it's closed: you can only access
variables in a class scope from that scope, and not from enclosed
scopes (e.g., method defintions) at all.


Carl Banks


From jcd at unc.edu  Thu May  8 13:26:04 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Thu, 08 May 2008 13:26:04 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805080912.29438.onsen-neko@gmx.net>
	<1210244572.6529.5.camel@jcd-desktop>
	<200805081911.47081.onsen-neko@gmx.net>
	<1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
Message-ID: <1210267564.8621.18.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 13:25 -0400, J. Cliff Dyer wrote:
> On Thu, 2008-05-08 at 19:11 +0200, Daniel Marcel Eichler wrote:
> > Am Donnerstag 08 Mai 2008 13:02:52 schrieb J. Clifford Dyer:
> > 
> > > > I didn't said that interfaces are a kind of duck-typing. In fact it
> > > > was the exact opposite.
> > > >
> > > > > Sometimes you need that kind of rigor, and you can get it as
> > > > > easily as
> > > >
> > > > And sometimes you need more. So what?
> > >
> > > More rigor than Zope's interfaces offer?  
> > 
> > Did i say that? I only explained why interfaces are not 'simple method 
> > stubs'.
> > 
> 
> Um.  Yes.  I said "sometimes you need that kind of rigor," and proceeded
> to explain how zope interfaces offer it. (which you snipped from your
> quotation), and you said "sometimes you need more."  If you were
> actually responding to what I said, then "sometimes you need more" must
> mean more than zope interfaces.  
> 
> > > That's new information to 
> > > me. Perhaps you should stop being argumentative for a moment, and
> > > explain exactly what it is you're looking for and why Zope interfaces
> > > don't fit the bill.
> > 
> > Perhaps you should read more accurate. It's not my thread and i'm not 
> > looking for anything here.
> > 
> 
> Then what were you trying to say?
> 
-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From m13799684969 at 126.com  Sun May 25 16:39:26 2008
From: m13799684969 at 126.com (m13799684969 at 126.com)
Date: Sun, 25 May 2008 13:39:26 -0700 (PDT)
Subject: Discount, EDhardy, 10Deep, Bape, COOGI, GGG, Rich Yung, Designers 
	Hoodies, etc
Message-ID: <374b0c6c-d39d-4d10-893d-80801f6b7228@j1g2000prb.googlegroups.com>

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Lauren Jacket, China supply
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GGG hoody, Bape hoody, 10Deep hoodies, Rich Yung Hoodies,
Brand Belt China Sale : Discount Lacoste Belt, LV Belts, ( G U C C I )
Belts,
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Brand Cap, Hat:
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Lacoste Cap, etc

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From jr9445 at ATT.COM  Fri May  9 10:02:59 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Fri, 9 May 2008 09:02:59 -0500
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908CA4E1B@brexc51p>

> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of grbgooglefan
> Sent: Friday, May 09, 2008 9:41 AM
> To: python-list at python.org
> Subject: How to modify meaning of builtin function "not" to "!"?
> 
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1
> 
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?


Serious question:  Why would you want to?  'not' is easier to read (and type) than '!'.  Mentally, when you  see '!' you think 'not'.  It's also harder to overlook 'not', especially when compared to '!contains()'.  Finally, I imagine that Spanish speaking coders suffer enormous mental anguish when they see a right-side up '!' at the beginning of a sentence.

if ( ! contains(s1,s2) ):
     return 1

if ( !contains(s1,s2) ):
     return 1

if ( not contains(s1,s2) ):
     return 1

if ( ?contains(s1,s2)):
     return 1




*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA625




From duncan.booth at invalid.invalid  Thu May 29 11:33:26 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 May 2008 15:33:26 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
Message-ID: <Xns9AADA759AF2ABduncanbooth@127.0.0.1>

"Dan Upton" <upton at virginia.edu> wrote:

> On Thu, May 29, 2008 at 3:36 AM, Duncan Booth
><duncan.booth at invalid.invalid> wrote:
>> Dave Parker <daveparker at flamingthunder.com> wrote:
>>
>>> Catch doesn't return just error types or numbers, it can return any
>>> object returned by the statements that are being caught; catch
>>> doesn't care what type they are.  For example:
>>>
>>>   Writeline catch(set x to "hello world".).
>>>
>>> will write "hello world".
>>
>> I really don't get this. Surely the point about an error being thrown
>> to a catch statement is that the error path is separate from the
>> normal execution path? What you are doing here is ensuring that
>> unexpected errors have no chance at all of propagating up to the top
>> level: they are invariably going to get caught by some other handler
>> that was installed just because someone was too lazy to write a set
>> statement followed by a writeline.
> 
> It also looks like an overloading of catch, semantically similar to
> the C: 
> 
> int retcode;
> if( retcode = doSomethingThatReturns0or1() ) printf("Hello world");
> 
> Again, I don't think you want to start overloading your
> exception-handling mechanism.  If you want a set expression to be
> equal to the l-value at the end, that's fine, but there's no reason
> that catch should evaluate to an object or an integral- or real-valued
> exception in error cases, or of the last statement of the block if
> there's no error.  (Evaluating a block to be equal to its last
> statement is okay, I guess; I know at least that there's a call in
> Scheme that lets you do a more imperative programming style in the
> functional language--whether that's a good thing is probably a holy
> war.)  I just think if you're shooting for an easily understandable
> language, overloading error handling requires more thought on the
> programmer's part, not less, because they have to reason about all
> outcomes.
> 
I like BCPL's way of handling block expressions: VALOF is followed by a 
block of statements and within that block RESULTIS gives the result. 
This lets you exit the block early (just like a return statement does), 
but without returning from the current procedure (unless of course the 
entire body of the procedure is a VALOF block). Naturally the result has 
to be explicitly specified (otherwise the value is undefined).

Maybe FT should do something similar:

   Writeline value of (set x to "hello world". Result is x.).

and catch can then stick to catching errors.

-- 
Duncan Booth http://kupuguy.blogspot.com


From johnjsal at NOSPAMgmail.com  Wed May 14 22:52:08 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:52:08 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
	<c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>
Message-ID: <20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>

On Tue, 13 May 2008 06:25:27 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> > I'm pretty generally interested, but where can print layout take you?
> 
> Not far, especially with books disappearing.  Our library says that
> these days, only 25% of their checkouts are books; the other 75% are
> DVDs, CDs, etc.

Sorry, but I must point out a logical flaw in this statement. Assuming your stats are even true, just because books are now only 25% of checkouts rather than, for example, 80%, doesn't necessarily imply that any less books are being checked out (i.e. "disappearing"). It can just as easily mean that *more* of the other things are being checked out while books remain the same.

Example:

Total number of items checked out:    100
Total number of books checked out:     80
Percentage of books checked out:       80%

Total number of items checked out:    320
Total number of books checked out:     80       # same as above
Percentage of books checked out:       25%


From skanemupp at yahoo.se  Sun May  4 16:59:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sun, 4 May 2008 13:59:08 -0700 (PDT)
Subject: pygame.mixer.load not working
Message-ID: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>

import pygame

pygame.mixer.music.load(example1.mp3)
pygame.mixer.music.play(loops=1, start=0.0)


Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 3, in
<module>
    pygame.mixer.music.load(example1.mp3)
NameError: name 'example1' is not defined

example1 is in the same directory as the script


From paddy3118 at googlemail.com  Mon May 12 11:15:49 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 12 May 2008 08:15:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<lI6dnUFf8M6yxbXVnZ2dnUVZ_gKdnZ2d@posted.visi>
Message-ID: <df34b9a3-bbb0-4655-ab48-c367613e77fa@2g2000hsn.googlegroups.com>

On May 12, 3:46 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-12, Ben Finney <bignose+hates-s... at benfinney.id.au> wrote:
>
> > Paddy <paddy3... at googlemail.com> writes:
>
> >> I've used Fortran and C and so would tend to use either i,j,k as the
> >> unused loop variable above, or, for clarity, call it something
> >> descriptive like loop_count, if the loop body would be clearer.
>
> > The problem with all of these names is that they also have long
> > precedent as names of values that *will* be used inside the loop.
>
> I guess people who standardize on loop_count never nest loops. :)
>
> > Because of the precedent of those names, choosing one of those
> > names doesn't make it clear to the reader that the value is
> > never used; they have no indication from you of that until
> > they look over the code a few times. It's implicit rather than
> > explicit.
>
> And when somebody adds a nested loop things fall apart.
I don't have an example to hand. A lot of casses of repeat_X_times
inside a loop of repeat_Y_times would naturally be written as
repeat_Y*X_times.
Oh, wait a bit,
<oversimplified_example_alert>
for i in range(3):
  print "Stay!"
  for j in range(2):
    print "Come over."
</oversimplified_example_alert>

Which could become:

for outer_stay_repetions in range(3):
  print "Stay!"
  for inner_come_over_repetions in range(2):
    print "Come over."

But the second is daft. Nested repeats don't neccessarily pose a
problem to choosing meaningful names for repeat counters that are not
going to be referenced in the loop body, and most times i,j,k are fine
for used and un-used loop indices I find.

- Paddy
(Or were you just having a laugh ;-)


From marco at sferacarta.com  Thu May  8 09:59:21 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 15:59:21 +0200
Subject: "prove"
In-Reply-To: <mailman.770.1210254618.12834.python-list@python.org>
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <0HDUj.36466$o06.26411@tornado.fastwebnet.it>

Lucas Prado Melo wrote:

> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

TUtorial 9.3.4, method objects

What exactly happens when a method is called? You may have noticed that 
x.f() was called without an argument above, even though the function 
definition for f specified an argument. What happened to the argument? 
Surely Python raises an exception when a function that requires an 
argument is called without any -- even if the argument isn't actually 
used...

Actually, you may have guessed the answer: the special thing about 
methods is that the object is passed as the first argument of the 
function. In our example, the call x.f() is exactly equivalent to 
MyClass.f(x). In general, calling a method with a list of n arguments is 
equivalent to calling the corresponding function with an argument list 
that is created by inserting the method's object before the first argument.


From skunkwerk at gmail.com  Mon May 12 15:33:48 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:33:48 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<mailman.958.1210565450.12834.python-list@python.org>
Message-ID: <6f94632a-7e39-4174-aaee-74750bbdea15@a9g2000prl.googlegroups.com>

On May 11, 9:10 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 11 May 2008 13:16:25 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?
>
> Like using a separate thread to create the other 100?
>
> --
> Gabriel Genellina

thanks Gabriel,
   i think that could do it - let me try it out.  don't know why i
didn't think of it earlier.


From dullrich at sprynet.com  Tue May 20 07:12:01 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 06:12:01 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
Message-ID: <2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>

On Mon, 19 May 2008 14:48:03 +0200, pataphor <pataphor at gmail.com>
wrote:

>On Mon, 19 May 2008 06:29:18 -0500
>David C. Ullrich <dullrich at sprynet.com> wrote:
>
>> Maybe you could be more specific? Various "positions" I've
>> taken in all this may well be untenable, but I can't think
>> of any that have anything to do with whether the data should
>> be a single list instead of a list of lists.
>
>What's 'untenable' (hey, I tried to get away with a smiley, remember)

Perhaps I should say that I was in no mood for smileys yesterday
morning: I hadn't eaten in 24 hours, hadn't had any water in
12 hours, and was anticipating an unpleasane instance of
what my doctor likes to call a "procedure" coming up in
a few hours. (Yes, everything went fine, thanks for asking -
today all is sweetness and light again.)

>is that a matrix is a list of rows. Suppose you do the transpose trick
>with the zip(*M) routine, now it's a list of columns. Both views are
>equal, there is no getting around the fact that you're holding an
>unnatural predisposition towards seeing the matrix as a list of rows,
>which it is most definitely not ...

Well, ok. Like I said, I never _took_ the position that it _should_
be a list of lists, I just said I didn't see the advantage to using
a single list.

Yes, the asummetry in my setup might be regarded as an 
aesthetic flaw. But that doesn't mean it doesn't work right,
and in any case _I_ regard it as a _feature_: rows and
columns look the same to the user even though they're
very different under the hood.

Although they're going to look the same, in the applications
I have in mind I expect that row operations will be more
frequent than column operations, so if we _were_ going
to worry about optimizing things optimizing row access 
might be reasonable.

>I was holding the brakes for this argument because I realize it's
>intuitive and also because Gabriel seems to want a list stay a list if
>he assigns something a list. But that's untenable too. Suppose you
>assign a column to a list? The list is torn to shreds and placed over
>multiple rows.

His desire here makes a lot more sense to me than it
seemed to at first, when he pointed out the problems
with "arow = m.row[0] = []". But this is a good point;
if we have rows _and_ columns then it seems like
he really can't have it his way.

Today's little joke: Long ago I would have solved
this by storing the data as a list of rows and _also_
a list of columns, updating each one any time the
other changed. Just goes to show you things
could always be worse...

>> (The only way I can parse this to make it relevant is to
>> assume that the position you're referring to is that a
>> list of lists is better than a single list. If so: First, I
>> haven't said that it was. Second, saying "B is untenable"
>> is not much of an answer when someone asks why you
>> say A is better than B.)
>
>Yes, it was not much of an answer but I was afraid of ending up in
>this quagmire. I now see that it is unavoidable anyway if I want to
>explain myself. Why couldn't you just see it the same way as me and
>leave it at that without waking up all the creatures of hell :-)

Sorry.

>> >And to address an 
>> >item in a matrix costs two lookups, row and column, while an array
>> >needs only one. 
>> 
>> The phrase "premature optimization" springs to mind.
>
>Well, I really liked your  slicing idea ...
>
>> This is _Python_ we're talking about. Supposing you're right that
>> doing two lookups _in Python_ is faster than doing one lookup
>> plus the calculuation col + row*width _in Python_, it can't
>> make enough difference to matter. In the sort of application I
>> have in mind things already happen "instantaneously".
>
>The computation is almost certainly faster. Lookups are expensive.

I know one thing about Python: I don't know exactly how it works,
and hence it's very difficult to be certain about such things without
actually testing them. Which is not to say you're not right.

>However I concede the point because we're not supposed to worry about
>such stuff. But it *is* a simpler format.

No wait, I know _two_ things about Python: (i) [repeat 
above] (ii) we're supposed to worry about such things 
_after_ determining that this particular such thing is 
actually the bottleneck. It seems incredibly unlikely 
that this detail is going to have any significance at
all in the final product.

>> The point is not to improve on NumPy. Trying to improve on
>> NumPy in pure Python code would be silly - if I wanted
>> optimized large matrices I'd _use_ NumPy. The point is just
>> to give a simple "intuitive" way to manipulate rows and
>> columns in small matrices. 
>
>Yes, me too. This is all about intuition.
>
>> So I'm not looking ahead to the future, things are not
>> scalable? The thing is not _supposed_ to scale up to
>> large matricies. If a person were dealing with large
>> matricies then almost all of it would need to be
>> rewritten (and if a person were dealing with really
>> large matrices then trying to do the thing in pure
>> Python would be silly in the first place, and insisting
>> on being able to write things like "m.row[0] =
>> m.row[1] + m.row[2]" could very well be a totally
>> wrong approach to begin with - I'd figure out the
>> operations I expected to need to do and write functions
>> to do them.)
>
>The reason why I am interested in this is that since I was writing
>sudoku algorithms some time ago I have been looking for ways to interact
>with data according to different views. I want the data to update even
>when I have made changes to them according to another view. In my case
>things are even more complex than they are with matrices because I
>tend to view sudoku as subcases of binary cubes. Imagine a 3d 9*9*9
>chessboard and try to place 81 non-threatening rooks in it. This is not
>quite a solution to a sudoku but every sudoku is also a solution to this
>problem. 
>
>One of the solution strategies I thought of was forgetting about the 3d
>binary cube's content at all, and just update row, column and file
>totals (I start with a 'filled' cube and wipe away fields that are
>covered by the 'rooks') to drive the optimization. Somehow this seems
>possible even though I do not use the cube itself anymore. It just
>exists as a figment of my imagination but still it defines the context.
>
>I hope you understand how this was driving me crazy and why I would be
>more than happy to return to a safe and sound, actually 'existing' cube,
>if only there was a way to access rows, columns and files (for example
>sum their elements) as shared data. In the end I realized that
>everything I was doing was an abstraction anyway and if that is the
>case why not use the simplest possible representation for the data and
>let any matrices, rows, columns, files, cubes and so on exist somewhere
>higher up in the levels of abstraction of the code.

Yes, that's interesting and explains why you found the current
discussion interesting.

>> Really. In one of the intended applications the matrix
>> entries are going to be home-made Rationals. Just
>> adding two of those guys takes a long time. It's
>> still more than fast enough for the intended application,
>> but [oh, never mind.
>
>Too late :-)
>
>> Sorry about the argumentative tone - I _would_ like
>> to know which "untenable position" you're referring to...
>
>No, it's no problem. Thanks again for bringing this up. Once I overcame
>my initial resistance to bringing up all this old (for me) issues I was
>more than happy to share intuitions. I hope this somehow results in a
>shared data type. Even just a matrix_with_a_view would be very nice.

Expressing interest is a big mistake...

My current Matrix is broken (thanks again, Gabriel).
And no, come to think of it, as he points out there's
really no reason descriptots should be involved.

Sometime soon a thread will appear titled something
like "indexed attributes" with a stripped-down but
functional example of what I have in mind for Matrix
(including enough complication to illustrate why
the way I'm doing seems to _me_ to be simpler
than alternatives that have been suggested).

>P.

David C. Ullrich


From wizzardx at gmail.com  Tue May  6 10:40:36 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 16:40:36 +0200
Subject: How do you debug memory usage?
In-Reply-To: <3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
Message-ID: <18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>

On Tue, May 6, 2008 at 4:21 PM, Banibrata Dutta
<banibrata.dutta at gmail.com> wrote:
> Many not be the most intuitive and elegant solution (I'm just a Python
> newbie), but if your Python code is constrained to the usage of Python 2.2
> language features, you could use Jython, and then (I'm hoping, since I've
> not tried this myself), use the Java Memory usage profiling/debugging tools.
>

Thanks for your post. I didn't think of Googling for "python memory
profiling". That search returns a lot of results.

I'll check a few of those results and post to the list if I find something good.

David.


From kamhung.soh at gmail.com  Fri May  2 17:13:46 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 03 May 2008 07:13:46 +1000
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <op.uajo880yev04yd@hungvista>

On Fri, 02 May 2008 23:47:11 +1000, Jetus <stevegill7 at gmail.com> wrote:

> On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
>> > I have a comma delimited file that is separated by comma's, and then
>> > sometimes by ","
>>
>> > c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
>> > 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
>> > c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
>> > 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
>> > c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
>> > 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>>
>> The items are always delimited by commas but some items themselves  
>> contain
>> a comma and therefore are enclosed in double quotes.  So it's not
>> inconsistent.
>>
>> > How do I convert that line into a list?
>>
>> Use the `csv` module in the standard library.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
>
> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

The reader in the csv package automatically handles double-quoted fields.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From rileyrgdev at gmail.com  Wed May 21 07:29:11 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Wed, 21 May 2008 13:29:11 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
Message-ID: <g11128$n1n$2@registered.motzarella.org>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Gabriel Genellina a ?crit :
>> En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch
>> <deets at nospam.web.de> escribi?:
>>> Agustin Villena schrieb:
>>
>>>> is there anyway to show the class of a method in an exception's
>>>> traceback?
>>>>
>>>> I want to improve the line File "G:\dev\exceptions\sample.py",
>>>> line 3, in foo
>>>>
>>>> to File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>>>
>>>> Is this improvement feasible
>>> It should be. You can get a dictionary of the locals of an
>>> exception stack frame, of which you could extract the
>>> self-parameter's class.
>>
>> That by itself is not enough, the method could be inherited; one
>> should walk the base classes in the MRO to find the right one. And
>> deal with classmethods and staticmethods. And decorators that don't
>> preserve meta information... 
>
> And monkeypatches.
>
>> Hmmm, I think it isn't so trivial as it
>> seems.
>
> And not that useful - why would one care about the function being
> defined in class X or Y when one have the exact file and line ?

Very obvious I would think. One can develop ones own interactive class
browser and code navigator. One can not bring up class help from "line 3
in x.py" but one can from "classname : MyClass at line 2 in z.py". With
the class name I can navigate directly to all sorts of class related
information without the need to delve into a physical usage of it e.g
program.py at line 3.




From banibrata.dutta at gmail.com  Mon May 12 01:43:45 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 11:13:45 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
Message-ID: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>

Hi,

Again a noob question.

Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
correct to conclude that there is no RDBMS agnostic, single/uniform DB
access API for Python ?
Something in the lines of JDBC for Java, DBD for Perl etc. ?

How is the RDBMS change handled for solutions which need to work with
different RDBMSs ??

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From hdante at gmail.com  Sun May 11 19:20:00 2008
From: hdante at gmail.com (hdante)
Date: Sun, 11 May 2008 16:20:00 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <7c9edad0-abf6-4818-aad3-63259774d533@z72g2000hsb.googlegroups.com>

On May 11, 7:27?pm, Sven Siegmund <sven.siegm... at gmail.com> wrote:
> #!/usr/bin/python

 Notice that this line is probably not what you want, unless you
overwrote the default python 2 installation. The line should be:

 #!/usr/bin/env python3.0

 (this is irrelevant to the bug, however)

> IDLE complains about "invalid character in identifier" and highlights
> "zdroj" red in the first line (sic!).

 It worked here (Python 3.0a5 (r30a5:62856, May 11 2008, 19:52:04)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2). I started IDLE 3.0a5,
clicked the open menu, loaded the file, then run->run module. I've
copied and pasted your code and created the "slovn?k.txt" file. I'm
using tk 8.4.16.

 Would you mind reinstalling and notice any warning message during
compilation ?


From notnorwegian at yahoo.se  Mon May 19 23:36:45 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 20:36:45 -0700 (PDT)
Subject: test mult vars to same value, how to shorten expr?
Message-ID: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>

 if i want o test:
if a == 5 and b ==5 and c==5 ... z==5

is there some synctactic suagr for this?

rather than maiking one of my own i mean, something built-in like:
if a,b,c... z == 5:


From skanemupp at yahoo.se  Thu May  1 11:55:53 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 1 May 2008 08:55:53 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
Message-ID: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>

im doing this :
http://www.learningpython.com/2006/03/12/creating-a-game-in-python-using-pygame-part-one/

and when closing the program the window stays up and doesnt respond. i
tried adding this:
http://www.pygame.org/wiki/FrequentlyAskedQuestions

bu it doesnt work, or maybe im doing it wrong.

heres the code without the added tutorial exit:


import os, sys
import pygame
from pygame.locals import *

if not pygame.font: print 'Warning, fonts disabled'
if not pygame.mixer: print 'Warning, sound disabled'

class PyManMain:
    """The Main PyMan Class - This class handles the main
    initialization and creating of the Game."""

    def __init__(self, width=640,height=480):
        """Initialize"""
        """Initialize PyGame"""
        pygame.init()
        """Set the window Size"""
        self.width = width
        self.height = height
        """Create the Screen"""
        self.screen = pygame.display.set_mode((self.width
                                               , self.height))


    def MainLoop(self):
        """This is the Main Loop of the Game"""
        while 1:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()


class Snake(pygame.sprite.Sprite):
    """This is our snake that will move around the screen"""

    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image, self.rect = load_image('snake.png',-1)
        self.pellets = 0

if __name__ == "__main__":
    MainWindow = PyManMain()
    MainWindow.MainLoop()



From yves at zioup.com  Fri May  2 00:36:06 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 04:36:06 GMT
Subject: no cleanup on TERM signal
Message-ID: <WSwSj.236857$pM4.38686@pd7urf1no>

I did a few tests with this script:

class byebye:

   def __del__(self):
     print 'Bye, bye...'


x = byebye()


x.del() gets executed if:
-I del x, then run gc.collect()
-simply exit the script
-get the script to abort on an exception

But if I kill it with the default signal TERM, the script dies, but I don't 
get the message, so I am assuming that python isn't taking the time to 
cleanup, even though that is (was) what TERM was intended for.

Has this been discussed before ? Is worth a suggestion (PEP) ?


-- 
Yves.
http://www.SollerS.ca


From fetchinson at googlemail.com  Mon May 19 14:08:42 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 19 May 2008 11:08:42 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <4831516b$0$24599$426a74cc@news.free.fr>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<4831516b$0$24599$426a74cc@news.free.fr>
Message-ID: <fbe2e2100805191108y9fb342eh5307959620c032bc@mail.gmail.com>

>
>  Hey all. Just thought I'd ask a general question for my own interest.
>> Every time I think of something I might do in Python, it usually
>> involves creating a GUI interface, so I was wondering what kind of
>> work you all do with Python that does *not* involve any GUI work.
>> This could be any little scripts you write for your own benefit, or
>> what you do at work, if you feel like talking about that! :)
>>
>
> web apps, command line utilities, and of course libraries.


Wow, really? I would have never guessed that anyone is doing command line
utilities and "libraries" as examples of projects that don't need a GUI.

Just kidding :)

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown
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From gnewsg at gmail.com  Mon May 26 13:30:10 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Mon, 26 May 2008 10:30:10 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
Message-ID: <acf63ade-4704-47a4-8cc1-8139b7c8e38c@f36g2000hsa.googlegroups.com>

On 25 Mag, 17:40, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a small wxPython application. Today I was trying to add some
> RPC capability to it, so I implemented an instance of
> SimpleXMLRPCServer that runs in a separate thread when invoked and
> answers requests.
>
> All went fine until I realized that I have to sometimes stop the
> server - which is where I ran into a problem. Python threads can not
> be killed after they've been started. They can be kindly requested to
> end, but it's up to the thread itself to decide when it wants to
> finish. At least this is my understanding. It probably makes sense,
> because threads can hold resources which can't just be dropped
> suddenly, and have to be cleaned in a proper manner. (Does this sound
> like the truth ?)
>
> Anyway, this creates a problem because SimpleXMLRPCServer likes to
> block and never return. I dug deeper and found out that all offspring
> of SocketServer can only handle requests in a blocking manner. Even if
> you call handle_request( ) and not serve_forever(), it will block
> until a request is received and handled. This means that a
> SocketServer object running in a thread blocks the thread, and this
> thread can not be stopped.
>
> Is there any graceful solution to this problem ?
>
> I suppose I can use sockets in non-blocking mode, or use select(), but
> this will mean I will have to implement my server with raw sockets and
> not a handy helper like SocketServer. For the XML-RPC server I want
> this is a headache, as I will probably have to implement my own XML-
> RPC server based on raw non-blocking sockets.
>
> Thanks in advance for any ideas and suggestions
> Eli

A "shutdown" method has been added to SocketServer.
Since it will be available in Python 2.6 and 3.0 you could look at the
patch and include a modified version of SocketServer into your package
and use it:
http://bugs.python.org/issue1193577


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From arnlen at mac.com  Thu May  1 01:38:29 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 07:38:29 +0200
Subject: PIL and IPTC
References: <mailman.386.1209575399.12834.python-list@python.org>
Message-ID: <0001HW.C43F23F5007F49F2B01AD9AF@news.individual.de>

Thanks, that is what I needed to get started.



From gagsl-py2 at yahoo.com.ar  Tue May  6 01:18:16 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 02:18:16 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<96087833-b427-4615-9188-c756394af15c@f24g2000prh.googlegroups.com>
Message-ID: <op.uapvoqssx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 05:08:15 -0300, Raymond Hettinger <python at rcn.com>  
escribi?:

> On May 3, 9:50?am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> I did the following calculation: ?Generated a list of a million random
>> numbers between 0 and 1, constructed a new list by subtracting the mean
>> value from each number, and then calculated the mean again.
>>
>> The result should be 0, but of course it will differ from 0 slightly
>> because of rounding errors.
>
> See:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/393090

Awesome!

> See:
> http://svn.python.org/view/sandbox/trunk/statistics/statistics.py?rev=40981&view=markup

Wonderful!

-- 
Gabriel Genellina



From notbob at nothome.com  Sat May 10 14:18:45 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 18:18:45 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
Message-ID: <9GlVj.168$PE5.102@fe087.usenetserver.com>

On 2008-05-10, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

> Shebang is certainly broken, possible causes:
> 1. Wrong line endings (should be \n)

Nope.  Not it.

> 2. Whitespace before the shebang

BINGO!  ....we have a winner.  ;)

I thought for sure that was not correct.  No white space before the
sheba....  Wait a minute!  Howzabout a blank line above the shebang?  D0H!!

These are the minute details that bedevil the poor noob.  I've read dozens
of tutorials on different prog langs and have never read a single thing on
white space or blank lines preceding a shebang.  Till now.  I always get
frustrated and give up on learning programming, not really caring much for
coding, anyway.  But, dammit, I'm gonna stick with it this time.  I'll learn
python if it kills me!  ....that is, if you folks can stand all my dumb
questinons.  ;)

Thank you, Ivan, and other repondents.  

nb  ....back to while loops



From beema.shafreen at gmail.com  Sat May 17 10:47:55 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Sat, 17 May 2008 20:17:55 +0530
Subject: comparison of files using set function
Message-ID: <aa405c1f0805170747y7fd128dwbdf9dd91404c58e4@mail.gmail.com>

I have files with two column, column 1 is with id and column 2 is with
data(sequence)
My goal is to create a table in such a way, the column one of the table
should have all the id from the files and next column will be have the
respective seq of the file1 with correlation to the id and the third column
will be sequence information of the next file with respective to the id
original files look like this

45    ytut
46    erete
37   dfasf
45  dassdsd


and so on  for all the 10 files that is it has two column as mentioned
above.

The output should look like this:

Id    file1      file2     file3     file4   file5
43    ytuh    ytuh     ytuh    ytuh    ytuh
46   erteee   rty       ryyy              ertyu
47   yutio    rrr                    eeerr



The goal is if the pick all the common id in the files and with their
respective information in the adjacent rows.
the various conditons ca also prevails
1) common id present in all the files, which have same information
2)common id present in all the files, which donot have same information
3) common id may not be present in all the files

But the goal is exactly find the common id in all the files and add their
corresponding information in the file to the table as per the view
 my script :
def file1_search(*files1):
    for file1 in files1:
        gi1_lis = []
        fh = open(file1,'r')
        for line in fh.readlines():
            data1 = line.strip().split('\t')
            gi1 = data1[0].strip()
            seq1 = data1[1].strip()
            gi1_lis.append(gi1)
        return gi1_lis
def file2_search(**files2):
    for file2 in files2:
        for file in files2[file2]:
            gi2_lis = []
            fh1 = open(file,'r')
            for line1 in fh1.readlines():
                data2 = line1.strip().split('\t')
                gi2 = data2[0].strip()
                seq2 = data2[1].strip()
                gi2_lis.append(gi2)

            return gi2_lis
def set_compare(data1,data2,*files1,**files2):
    A = set(data1)
    B = set(data2)
    I = A&B # common between thesetwo sets

    D = A-B #57 is the len of D
    C = B-A #176 is  the len of c
#    print len(C)
 #   print len(D)
    for file1 in files1:
        for gi in D:
            fh = open(file1,'r')
            for line in fh.readlines():
                data1 = line.strip().split('\t')
                gi1 = data1[0].strip()
                seq1 = data1[1].strip()
            if gi == gi1:
#                print line.strip()
                    pass

    for file2 in files2:
        for file in files2[file2]:
            for gi in C:
                fh1 = open(file,'r')
                for line1 in fh1.readlines():
                    data2 = line1.strip().split('\t')
                    gi2 = data2[0].strip()
                    seq2 = data2[1].strip()
                if gi == gi2:
                   # print line1.strip()
                    pass
if __name__ == "__main__":
    files1 = ["Fr20.txt",\
              "Fr22.txt",\
              "Fr24.txt",\
              "Fr60.txt",\
              "Fr62.txt"]
    files2 = {"data":["Fr64.txt",\
              "Fr66.txt",\
              "Fr68.txt",\
              "Fr70.txt",\
              "Fr72.txt"]}
    data1 = file1_search(*files1)

    """113 is the total number of gi"""
    data2 = file2_search(**files2)
    #for j in data2:
     #   print j
    """232 is the total number of gi found"""
    result = set_compare(data1,data2,*files1,**files2)

 It doesnot work fine... some body please suggest me the way i can proceed .
Thanks a lot

-- 
Beema Shafreen
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From ivan.illarionov at gmail.com  Mon May 26 12:20:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 16:20:26 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com>
Message-ID: <g1eo0a$27k1$1@news.mtu.ru>

On Mon, 26 May 2008 17:49:01 +0200, Sebastian 'lunar' Wiesner wrote:

[...]
> Modern frameworks like Django or Grok require a somewhat great adaption,
> since they strongly restrict the programmer's freedom.  I doubt, that
> you would get Django or Grok working like your asp framework.

Actually, mordern frameworks (at least Djagno) does not "restrict the 
programmer's freedom", they only encourage clean design.

It's perfectly possible to write Django app with only one view and url 
pattern that redirects everything to different template engine like 
Cheetah or Mako and all the logic could be put inside those templates.

But, IMHO, writing PHP-style Python webapp is silly.

Ivan


From kccnospam at glenevin.com  Tue May 20 20:38:22 2008
From: kccnospam at glenevin.com (seanacais)
Date: Tue, 20 May 2008 17:38:22 -0700 (PDT)
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
	<12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>
	<g0tro7$crq$03$1@news.t-online.com>
Message-ID: <eb253f33-db1a-4f38-b317-e779f82cfa12@f24g2000prh.googlegroups.com>

On May 20, 2:40 am, Peter Otten <__pete... at web.de> wrote:
> seanacais wrote:
>
> You have to ensure that the lines
>
> from Tkinter import *
> root = Tk()
>
> are *executed* before the line
>
> dname = dict((d, StringVar()) for d in OPDefaults)
>
> Peter
>
> PS: If you still can't fix your script, please post it completely or,
> better, a small self-contained (runnable) script showing the same problem

I had looked for that, but didn't see it.  After reading your post I
went back
to look again.  Indeed, the initOPValues() function was being called
before
the root=Tk().  I've fixed the order of the calls and my script is
behaving
exactly as I expect now.  Thank you for taking the time to help me.

Kevin


From aquagnu at gmail.com  Mon May 26 00:00:01 2008
From: aquagnu at gmail.com (Yosifov Pavel)
Date: Sun, 25 May 2008 21:00:01 -0700 (PDT)
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
	<98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>
Message-ID: <0ccd6c54-ecd9-46e8-a1f6-5313f3d7a45d@w7g2000hsa.googlegroups.com>

On 24 ???, 12:58, bukzor <workithar... at gmail.com> wrote:
> On May 23, 6:31 pm, Yosifov Pavel <aqua... at gmail.com> wrote:
>
> > Does somebody know existent tool for checking unhandled exceptions?
> > Like in Java when method throws exception but in code using this
> > method, try...catch is missed. May be something like PyChecker?
>
> > --
> > /Pavel
>
> I know that pychecker doesn't do that. The set of handled exceptions
> is probably much smaller than handled. Almost every line of code can
> throw ten different exceptions (at least my code). I'm not sure what
> specifically the output you'd like to see would look like.

OK. I understand point of view of all responders.
It seems I surmised why it's very difficult to do in tool like
PyChecker:
not only functions/methods but usual Python expression can mask
potential
exception source. And this tool must know how to parse every
expression
deep (to object protocol methods, for example). But it's possible in
principle...
And you are right: the output of this tool will be very verbal :-)

Thanks to all


From skanemupp at yahoo.se  Fri May  9 18:19:26 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 15:19:26 -0700 (PDT)
Subject: regexp help
Message-ID: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>

i want to a little stringmanipulationa nd im looking into regexps. i
couldnt find out how to do:
s = 'poprorinoncoce'
re.sub('$o$', '$', s)
should result in 'prince'

$ is obv the wrng character to use bu what i mean the pattern is
"consonant o consonant" and should be replace by just "consonant".
both consonants should be the same too.
so mole would be mole
mom would be m etc



From matthieu.brucher at gmail.com  Fri May 16 12:36:05 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Fri, 16 May 2008 18:36:05 +0200
Subject: writing python extensions in assembly
In-Reply-To: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <e76aa17f0805160936i5625dc34ld6e2dab3810c00f0@mail.gmail.com>

>
> yeah I don't know much about that,  I was figuring perhaps I could limit
> the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows.   also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.
>

Well, it is not the OS, but the ASM compiler.
As the other people, I will tell you to implement only the fraction of the
code that needs speed.

For the matter of an ASM Python extension, do not bother. Use a C extension
and embed inside the ASM parts that are needed.

Compilers can use SIMD calls. You can try the auto-vectorization support
(GCC and Visual Studio support it, at least partially). Then you can try
intrinsics that will give you the power of ASM without the troubles. They
are compiler specific, but not less than ASM ;)

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From miller.paul.w at gmail.com  Mon May 26 14:47:05 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 11:47:05 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>

There is no solid definition of "high level" that one can
unambiguously use to classify programming languages into "high level"
and "not high level," or "low level."

My personal definition is something along the lines of: a high-level
language is one which lets you solve problems without worrying about
"accidental complexity."  By "accidental complexity," I mean such
things as manual memory management, needing to explicitly close files,
etc.

Of course, I consider Python to be "high level."  It's garbage
collected, so, no manual memory management (most of the time --
sometimes the GC needs help); if I want to iterate through a sequence,
I don't have to do crap like

max = len (seq);
for (int i = 0; i < max; ++i) {
    do something with seq[i];
}

I just do:

for item in seq:
   do something with item

Another piece of evidence that points to Python's high-level status is
that if you take a look at some "pretty close to actual programming-
language looking pseudocode," then translate it into Python, typically
the Python code is not much longer than the pseudocode itself.  On the
other hand, translating pseudocode to C or Java often results 50-100%
more lines of code than there were lines of pseudocode.


From anrdaemon at freemail.ru  Tue May 27 21:10:20 2008
From: anrdaemon at freemail.ru (AnrDaemon)
Date: Wed, 28 May 2008 05:10:20 +0400
Subject: php vs python
In-Reply-To: <g1d1a4$1rpd$2@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
Message-ID: <613388153.20080528051020@freemail.ru>

Greetings, Ivan Illarionov.
In reply to Your message dated Monday, May 26, 2008, 04:47:00,

>> As I've said before - good programmers can write good code in any
>> language.

> Yes, they can. But it may be harder to do for them in one language and 
> easier in another.

It's obvious lie. If you have clear mind and you know language you're using,
there are absolutely NOTHING can deny you to write clear code.
Even using forth postfix notation, I have no problem writing good code, it's
as easy as writing bad code. And yes, I do see the difference.


-- 
Sincerely Yours, AnrDaemon <anrdaemon at freemail.ru>



From gilly.dekel at gmail.com  Sun May  4 14:36:42 2008
From: gilly.dekel at gmail.com (Gilly)
Date: Sun, 4 May 2008 11:36:42 -0700 (PDT)
Subject: Real Time Midi File Playback - Reading and Writing midi at the 
	same time
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
	<mailman.551.1209924903.12834.python-list@python.org>
Message-ID: <167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>

On May 4, 9:14 pm, David <wizza... at gmail.com> wrote:
> On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.de... at gmail.com> wrote:
> > Hi
> >  I am trying to create an application that uses some form of input to
> >  create a midi file.
> >  I would like for this to be a 'real time' process. In other words, I
> >  want to be able to begin playing the midi file before I finish writing
> >  it, and continue writing as it plays.
>
> Have you tried the MIDI libraries listed on this page?
>
> http://wiki.python.org/moin/PythonInMusic
>
> David.

Yes. I haven't found anything that would help me out...


From gagsl-py2 at yahoo.com.ar  Thu May 15 04:22:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 05:22:37 -0300
Subject: cgitb performance issue
References: <481F585A.5080707@admailinc.com>
	<op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<482B189C.1050302@admailinc.com>
Message-ID: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 13:51:40 -0300, Ethan Furman <efurman at admailinc.com>  
escribi?:
> Gabriel Genellina wrote:
>> En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman  
>> <efurman at admailinc.com> escribi?:
>>
>>> I tried adding a form to our website for uploading large files.
>>> Personally, I dislike the forms that tell you you did something wrong
>>> and make you re-enter *all* your data again, so this one cycles and
>>> remembers your answers, and only prompts for the file once the rest of
>>> the entered data is good.  However, the first time the form loads it  
>>> can
>>> take up to 30 seconds... any ideas why?
>>
>> Hard to tell without looking at the code... And what has cgitb to do  
>> with this?
>>
> Hmmmm... excellent question, and the answer is -- Nothing.  My
> apologies.  I'm importing cgi (cgitb was while I was debugging it), as
> well as a bunch of others.
>
> Here's the source, with a bunch of the actual html stripped out.  The -u
> as well as the last two lines were an attempt to eliminate the 30-second
> pause while it loads, as it seems to get all data transferred, then just
> waits for a while.  Any ideas appreciated.  My apologies for the ugly  
> code.

*When* do you see the 30-secs delay? After uploading the files? I see  
they're transferred using SMTP, but I think you're not talking about the  
time it takes to send the mail.
I'd use the old-fashioned "print" statement to see *what* gets executed  
and how long it takes each step.

-- 
Gabriel Genellina



From guibog at gmail.com  Sun May 25 23:33:35 2008
From: guibog at gmail.com (Guillaume Bog)
Date: Mon, 26 May 2008 11:33:35 +0800
Subject: php vs python
In-Reply-To: <V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
	<V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>
Message-ID: <bc5951d00805252033q7cfd1517i2246cc38f907b222@mail.gmail.com>

On Mon, May 26, 2008 at 8:12 AM, Jerry Stuckle <jstucklex at attglobal.net>
wrote:

> Ivan Illarionov wrote:
>
>> On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>>
>>> Not at all.  I do it every day.
>>>
>>> And BTW - yes, I write Python, also.  But I find I can write better,
>>> faster code in PHP.
>>>
>>
>> I find I can write better code in Python. Maybe it's just a matter of
>> personal preference?
>>
>>  Do you write PHP?
>>>
>> I did. And I hated it very much. I hated it so much that even I had few
>> Python scripts that generated PHP for me when it was possible.
>>
>>
> So you really don't write PHP.  Enough said.


I write or review PHP code everyday. While much can be done in PHP5 I still
feel Python has a cleaner definition and therefore allows writing faster
clean code.

I many places around I see people saying "doing XX is evil" or "YY
tool/function is now on my blacklist". Most of the time it is because of an
undocumented bug, unpredictable side-effect, or obscure security issue. This
propagates fears, and fears are not, in my opinion and experience, the best
companion of developers. It makes you stick on only the domain you know, and
write code very slowly and defensively. Fear comes from what we don't
understand. Take Regexp for example: when I came first to my current job,
nobody used them, everyone feared them, because Regexp can "bite" (i.e. do
something strange you cannot explain easily). After some time and patiently
explain Regexp sample to my teammates, everyone now want to play with them
(even when using them makes no sense).

If a language makes their users more confident and propagates less fears, I
would say it is better than the others in this respect. PHP has a good
documentation with user comments, which makes me more confident (I'll find a
solution) but, in my opinion, Python is better in this respect because the
way it has been crafted makes me more confident. (Often, when I open a PHP
application, the first 100 lines will be defensive stuff against
magic_quotes or other weird settings, while when I open Python third-party
modules, the first lines are most often nice docstrings, and the next lines
are easy to decipher classes and functions just doing the work.)

PHP did bite me hard (like a wild dog) at least once (postgreSQL NULL values
fetched through pg_fetch_object were both null and not null !... the bug was
very hard to find)

ASP / MSSQL did bite me a lot (like a dangerous snake) with undocumented
bugs, and so on.

Javascript can bite (like a wild cat) but can be domesticated through
frameworks like prototype.js

CSS can bite while HTML usually can't

As everyone knows pythons doesn't bite! (Or at least didn't bite me yet.)


>
>
> --
> ==================
> Remove the "x" from my email address
> Jerry Stuckle
> JDS Computer Training Corp.
> jstucklex at attglobal.net
> ==================
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From workitharder at gmail.com  Wed May 21 18:36:55 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 15:36:55 -0700 (PDT)
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
	<roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>
	<7b049fb8-c196-4ff6-873b-3893ab670b95@m3g2000hsc.googlegroups.com>
Message-ID: <b2810bf0-ad4d-43b5-ac8d-96ce68ee99a2@d1g2000hsg.googlegroups.com>

On May 21, 1:27?pm, bukzor <workithar... at gmail.com> wrote:
> On May 21, 12:13 pm, Roy Smith <r... at panix.com> wrote:
>
>
>
> > In article
> > <90ecca29-c4d8-4e89-908a-93850d7de... at i76g2000hsf.googlegroups.com>,
>
> > ?bukzor <workithar... at gmail.com> wrote:
> > > Does anyone have a pythonic way to check if a process is dead, given
> > > the pid?
>
> > > This is the function I'm using is quite OS dependent. A good candidate
> > > might be "try: kill(pid)", since it throws an exception if the pid is
> > > dead, but that sends a signal which might interfere with the process.
>
> > > Thanks.
> > > --Buck
>
> > The canonical way is to do kill(pid, 0). ?If it doesn't throw, the process
> > exists. ?No actual signal is sent to the process either way.
>
> > Of course, the process could exit immediately after the kill() call, so by
> > the time you find out it's alive, it's dead. ?Such is life.
>
> Thanks! That's exactly what I was looking for. A little more
> background:
>
> "If sig is 0 (the null signal), error checking is performed but no
> signal is actually sent. The null signal can be used to check the
> validity of pid."
>
> Taken from :http://www.opengroup.org/onlinepubs/009695399/functions/kill.html


Here are the functions I wrote with this information. There are three
functions:
kill() is similar to os.kill, but returns True if the pid is dead and
throws less exceptions
dead() checks if a process is dead, and gets rid of zombies if
necessary
goodkill() kills a pid by sending gradually harser signals until dead.




def kill(pid, signal=0):
    """sends a signal to a process
    returns True if the pid is dead
    with no signal argument, sends no signal"""
    #if 'ps --no-headers' returns no lines, the pid is dead
    from os import kill
    try: return kill(pid, signal)
    except OSError, e:
        #process is dead
        if e.errno == 3: return True
        #no permissions
        elif e.errno == 1: return False
        else: raise

def dead(pid):
    if kill(pid): return True

    #maybe the pid is a zombie that needs us to wait4 it
    from os import waitpid, WNOHANG
    try: dead = waitpid(pid, WNOHANG)[0]
    except OSError, e:
        #pid is not a child
        if e.errno == 10: return False
        else: raise
    return dead

#def kill(pid, sig=0): pass #DEBUG: test hang condition


def goodkill(pid, interval=1, hung=20):
    "let process die gracefully, gradually send harsher signals if
necessary"
    from signal import SIGTERM, SIGINT, SIGHUP, SIGKILL
    from time import sleep

    for signal in [SIGTERM, SIGINT, SIGHUP]:
        if kill(pid, signal): return
        if dead(pid): return
        sleep(interval)

    i = 0
    while True:
        #infinite-loop protection
        if i < hung: i += 1
        else:
            print "Process %s is hung. Giving up kill." % pid
            return
        if kill(pid, SIGKILL): return
        if dead(pid): return
        sleep(interval)


From __peter__ at web.de  Fri May 23 03:01:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 09:01:20 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
	<NisZj.288476$pM4.73650@pd7urf1no>
Message-ID: <g15q3v$fdp$02$1@news.t-online.com>

Yves Dorfsman wrote:

> Peter Otten <__peter__ at web.de> wrote:
> 
>> > A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
>> > with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
>> > with "zip" to do so?
> 
>> >>> items = [None] * 6
>> >>> items[::2] = 1,2,3
>> >>> items[1::2] = 4,5,6
>> >>> items
>> [1, 4, 2, 5, 3, 6]
> 
> My problem with this solution is that you depend on knowing how many
> elements you have in each list ahead of time. 

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from operator import
add" "list(reduce(add, zip(a, b)))"
1000 loops, best of 3: 637 usec per loop

$ python -m timeit -s"a = [1,2,3]*100; b =
[4,5,6]*100" "items=[None]*(2*len(a)); items[::2] = a; items[1::2] = b"
10000 loops, best of 3: 23.4 usec per loop

The speed gain is significant. Why should I throw away useful information if
I have it? I'd even be willing to convert one arbitrary iterable to a list
to get the length information.

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "aa = list(a);
items=[None]*(2*len(aa)); items[::2] = aa; items[1::2] = b"
10000 loops, best of 3: 29.5 usec per loop

> Assuming that both list 
> are of the same length, then, I find the following more elegant:
> 
> list1=[1,2,3]
> list2=[4,5,6]
> 
> reduce(lambda x, y: x+y, zip(list1, list2))
> 
> of course, zip creates tuples, so you end up with a tuple, therefore if
> you need for your solution to be a list:
> list(reduce(lambda x, y: x+y, zip(list1, list2)))

I'd rather use a plain old for-loop:

>>> from itertools import izip
>>> a = [1,2,3]
>>> b = [4,5,6]
>>> items = []
>>> for chunk in izip(a, b):
...     items.extend(chunk)
...
>>> items
[1, 4, 2, 5, 3, 6]

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from itertools
import izip" "items = []
> for chunk in izip(a, b): items.extend(chunk)"
1000 loops, best of 3: 242 usec per loop

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from itertools
import izip" "items = []; extend = items.extend
for chunk in izip(a, b): extend(chunk)"
10000 loops, best of 3: 70.9 usec per loop

> reduce(lambda x, y: x+y, list(zip(list1, list2)) )

list(zip(...)) has no effect here. Possible fixes

>>> reduce(lambda x, y: x + list(y), zip(list1, list2), [])
[1, 4, 2, 5, 3, 6]

>>> reduce(lambda x, y: x.extend(y) or x, zip(list1, list2), [])
[1, 4, 2, 5, 3, 6]

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "reduce(lambda x, y:
x.extend(y) or x, zip(a, b), [])"
1000 loops, best of 3: 368 usec per loop

are more complicated than elegant. Not recommended.

Peter


From bignose+hates-spam at benfinney.id.au  Tue May 13 19:43:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:43:43 +1000
Subject: built in list generator?
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
	<68uba1F2ur7lkU1@mid.uni-berlin.de>
Message-ID: <87hcd14vo0.fsf@benfinney.id.au>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> globalrev schrieb:
> > if i want  a list with all numbers between x and y is there a way to
> > do this with an inbult function.
> >
> > i mean i can always construct a function to do this but is there
> > soemthing like:
> >
> > nbrs = list(range(50,100, 2))
> 
> range *does* that. use xrange if all you want is to iterate.

Until Python 3.0, where 'range' returns an iterable.

-- 
 \      "It seems intuitively obvious to me, which means that it might |
  `\                                        be wrong."  -- Chris Torek |
_o__)                                                                  |
Ben Finney


From alefnula at gmail.com  Fri May  9 09:02:01 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 06:02:01 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
Message-ID: <f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>

This completely slipped of my mind... :)

I'm trying to change the:
http://wordaligned.org/svn/etc/echo/echo.py

So if the function is method it prints ClassName.MethodName instead of
MethodName(self|klass|cls=<... ClassName>).

But it turned out that in the decorator, the wrapped function is
always just a TypeFunction (I cannot find out if the function is
method, classmethod, staticmethod or just a plain function - tried
with inspect also)... And what is most interesting, when I do:

def w(fn):
    print 'fn:', id(fn)
    return fn

class A:
    @w
    def __init__(self): pass

print 'A.__init__:', id(A.__init__)

It turns out that the function I receive in the wrapper (even when I
return the same function) is not the function which will finally be
attached to the class...

Is there a way to find out in the decorator "what will the decorated
function be"?


From gherron at islandtraining.com  Wed May  7 16:44:46 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 07 May 2008 13:44:46 -0700
Subject: howto print binary number
In-Reply-To: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <482214BE.4040702@islandtraining.com>

dmitrey wrote:
> hi all,
> could you inform how to print binary number?
> I.e. something like
>
> print '%b' % my_number
>
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
>
> Thank you in advance, D
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Python 3.0 has such a formatting operation, but Python 2.x does not.  
However it's not hard to write.

If you really only going to need 8 bits, you can just build a table of 
bit patterns for each integer.  Try this bit of slight cleverness:

 >>> b = ['']
 >>> for k in range(8):
...          b = [i+j for i in ['0','1'] for j in b]
...
 >>> len(b)
256
 >>> b[63]
'00111111'


Gary Herron



From gandalf at shopzeus.com  Thu May 15 05:54:29 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 11:54:29 +0200
Subject: create window on panel
In-Reply-To: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
Message-ID: <482C0855.6010006@shopzeus.com>

Jimmy wrote:
> Hi, all
>
> I have been trying to use wxPython to design a GUI that will be
> displayed on the panel on the top of desktop. that is when the
> program starts, it will dwell on the panel to display some dynamic
> information.
>
> can anyone tell me in wxPython how to do this? thanks!
>   
AFAIK it cannot be done in pure wxPython. The reason is that your 
"panel" is part of the window manager. What kind of "panel" are you 
talking about anyway? Under Microsoft Windows it is called "the tray". 
In Gnome it is "panel" indeed. In KDE it might also be panel, there is 
OS X etc. They are quite different. For example, under MS Windows you 
cannot embed an application into the tray (other than an icon).

They are all different window managers, based on different client libs 
(MS gui, GTK, Qt etc.). wxPython is designed to be platform independent, 
and  it does not support special, platform dependent features. (Well it 
does a few...)

You need to tell us what kind of system are you using? Then we can tell 
you where to start. For example, there are extension modules for writing 
Gnome panel applications. (Well, it is not wxPython but GTK.)

BTW the idea is good: we could have "panel" support in wxPython, but 
since the interface of these panels (and how they should be programmed) 
is very different on different platforms, it would not be easy to implement.

   Laszlo



From gnewsg at gmail.com  Tue May 13 19:44:11 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 16:44:11 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1076.1210713955.12834.python-list@python.org>
Message-ID: <f9cc40fa-20ff-4936-9ed0-0b6cad014ca3@y38g2000hsy.googlegroups.com>

On 13 Mag, 23:25, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 13 May 2008 14:05:43 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
> >> >> We do not live in a pure world, Python isn't pure (practicality beats
> >> >> purity), and by attempting to send some data each time a .push*()
> >> >> method is called, there are measurable increases in transfer rates.
>
> >> >Good point. I'd like to ask a question: if we'd have a default
> >> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
> >> >such problem?
> >> >I've always found weird that asyncore has such an high default timeout
> >> >value.
> >> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>
> >> I'm not sure this is right. ?What timeout are we talking about? ?Twisted
> >> only wakes up when necessary.
>
> >> Jean-Paul
>
> >I'm talking about the asyncore.loop timeout parameter which defaults
> >to 30 (seconds).
> >I don't think that Twisted only wakes up when necessary (surely not by
> >using the select reactor).
> >Think about the schedule calls feature (reactor.callLater).
> >To have that work I guess that a continuous loop must always be kept
> >alive, regardless of the reactor used.
>
> To support scheduling calls, you just have to know when the next call is
> going to happen. ?Then, you can wake up at exactly that time. ?This is
> what Twisted does, even for select reactor. ;)

Yes but how do you know when it's the time to fire up a call without
using a thread?
You are forced to call time.time() periodically and check if that time
had come every time.
Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
That's where that should happen.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From __peter__ at web.de  Wed May 28 19:54:17 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 01:54:17 +0200
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <g1krb1$8vh$03$1@news.t-online.com>

rsoh.woodhouse at googlemail.com wrote:

> Hi,
> 
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
> 
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
> 
> import threading
> class TestThread(threading.Thread):
> 
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
> 
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
> 
> # end of sample script
> 
> Now if I run this using:
> 
> $ python ThreadTest.py
> 
> then it behaves as expected, ie an output like:
> 
> start
> finish
> 0
> 1
> 2
> ...
> 
> But if I run it as follows (how the inherited code was started):
> 
> $ python -c "import TestThread"
> 
> then I just get:
> 
> start
> 
> 
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

You might be interested in reading

http://groups.google.com/group/comp.lang.python/browse_thread/thread/01dbc25e6d1a2662/dcf55f1475dc529f

Peter


From angry-chris at hotmail.com  Wed May 21 04:58:54 2008
From: angry-chris at hotmail.com (Freaky Chris)
Date: Wed, 21 May 2008 01:58:54 -0700 (PDT)
Subject: Typeerror
In-Reply-To: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
Message-ID: <17358932.post@talk.nabble.com>


This is a simple error, you are passing the variable res as an interger to
use for a slice when what ever you are storing in res isn't an integer.

Chris

Beema shafreen wrote:
> 
> Hi all,
> I getting the following error when i run my scirpt ,
> can somebody help me regarding this to solve the type error problem
> 
> 
> Traceback (most recent call last):
>   File "get_one_prt_pep.py", line 59, in ?
>     if len(data[res])<=1:
> TypeError: string indices must be integers
> 
> 
> -- 
> Beema Shafreen
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
View this message in context: http://www.nabble.com/Typeerror-tp17358659p17358932.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From castironpi at gmail.com  Fri May  9 22:11:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 19:11:37 -0700 (PDT)
Subject: Python and the Bartender
Message-ID: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>

Incidentally, now that everyone knows English, writer would like to
critique his behavior.  I have leaned to the group for approval, at
times by disparaging the efforts of others, but other times not.  I
have expressed negative emotion.  Is anyone in earshot getting work
done that I am interfering with?

Otherwise, I might start telling jokes.

Sincerely,
Two For Bartenders.

P.S.  Please don't write the movies.


From vavasis at cpu111.math.uwaterloo.ca  Fri May 23 13:12:43 2008
From: vavasis at cpu111.math.uwaterloo.ca (Stephen Vavasis)
Date: Fri, 23 May 2008 17:12:43 +0000 (UTC)
Subject: array of 64-bit ints?
Message-ID: <g16tub$qoj$1@rumours.uwaterloo.ca>

Is it possible to have an array of 64-bit-ints using the standard Python 
array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
"long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
"long long int" or "size_t".  However, according to the Python array 
documentation, arrays of "size_t" or "long long int" are not available.

Thanks,
Steve Vavasis, vavasis at math.uwaterloo.ca




From deets at nospam.web.de  Sat May 10 08:13:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 10 May 2008 14:13:04 +0200
Subject: Find more than one error at once
In-Reply-To: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <68lhqrF2tlavsU1@mid.uni-berlin.de>

Joseph Turian schrieb:
> Is it possible to coax python to find more than one error at once?

What kind of errors? Syntax-errors? Then use one of the python source 
code analyzers, such as pylint or pychecker.

Diez


From basti.wiesner at gmx.net  Sun May 25 05:04:42 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 11:04:42 +0200
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com> <48391E5D.5050106@v.loewis.de>
Message-ID: <g1ba4q$vnb$02$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ "Martin v. L?wis" <martin at v.loewis.de> ]

>> I guess, Apache does some kind of memory caching for files, which are
>> often requested and small enough to fit into the system memory.
> 
> Are you sure about this? 

No, I'm not.  That's why I said "I guess" ;)

> Also, I don't see the need for Apache to cache frequently requested
> files itself. Instead, the operating system will cache frequently
> requested directories and files in memory, and it will do the same for
> a Python web server.

Of course, a modern OS kernel will perform caching anyway, but this is most
likely slower than in-process caching, since it will still require context
switches from userspace into kernel space.

Considering this, it seems reasonable to me, that apache does memory
caching, but I'm by far not sure, I wouldn't put a bet on this ;)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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From slianoglou at gmail.com  Thu May 29 22:56:29 2008
From: slianoglou at gmail.com (Steve Lianoglou)
Date: Thu, 29 May 2008 19:56:29 -0700 (PDT)
Subject: Getting up and running with Python on a Mac
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <5c625313-5987-4ed1-a29b-f431a16db92f@56g2000hsm.googlegroups.com>

> I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant ?- I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.

As already mentioned, you can use the already installed Python that
comes with Leopard (2.5.1), or you can download the latest from
python.org (2.5.2).

Either way, another way do get a scientific environment up and running
is by getting the "Scipy Superpack" installer. It's a frontend that
downloads and installs the latest scipy/numpy/matplotlib/ipython combo
(from their SVN repos). The author updates the builds every so often,
so you can for the most part run with the latest updates:

http://macinscience.org/?page_id=6

If you're using the Python that comes with Leopard, it will be very
straightforward and you'll have nothing else to do aside from running
the Superpack installer.

If you want to use the latest Python from Python.org, there will be
some trickery, which includes:

(i) getting the correct (newer) python to come first in your path,
(ii) installing setuptools for the new python
(iii) insuring that the new setuptools easy_install is "the one" in
your path
(iv) install the latest OS X wxPython build (from their website).

It's all fairly straightforward once you account for the
aforementioned gotchas.

As far as the enthought installer goes, I wasn't aware that it was
ready for showtime on OS X ... do you know otherwise?

HTH,
-steve


From daveparker at flamingthunder.com  Wed May 21 18:11:18 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 15:11:18 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
Message-ID: <f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>

On May 21, 3:41?pm, "Chris Mellon" <arka... at gmail.com> wrote:
> When told why you got different results (an answer you
> probably already knew, if you know enough about IEEE to do the
> auto-conversion you alluded to) ...

Of course I know a lot about IEEE, but you are assuming that I also
know a lot about Python, which I don't.  I assumed Python was doing
the auto-conversion, too, because I had heard that Python supported
arbitrary precision math.  Jerry Hill explained that you had to load a
separate package to do it.

> you treated it as another opportunity
> to (not very subtly) imply that Python was doing the wrong thing.

This person who started this thread posted the calculations showing
that Python was doing the wrong thing, and filed a bug report on it.

If someone pointed out a similar problem in Flaming Thunder, I would
agree that Flaming Thunder was doing the wrong thing.

I would fix the problem a lot faster, though, within hours if
possible.  Apparently this particular bug has been lurking on Bugzilla
since 2003: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:02:27 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:02:27 +0200
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <fvuj4k$74h$1@aioe.org>
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
	<efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>
	<fvuj4k$74h$1@aioe.org>
Message-ID: <48240513$0$3596$426a74cc@news.free.fr>

pistacchio a ?crit :
> bruno.desthuilliers at gmail.com ha scritto:
>> On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
>>> George Sakkis ha scritto:
>> (snip)
>>>> What does it matter if it's a single file or a dozen under a package ?
>>>> "Installation" for pure Python packages can be as simple as copying
>>>> the package under any directory in your PYTHONPATH.
>>> well, it doesn't matter if it's a single file or a package, but it
>>> _does_ matter if you have to put them under the path where python is
>>> installed because, in a typical shared web hosting environment (such the
>>> one that i use) you don't have access to system directories.
>>
>> You *never* have to install anything in the default path - install
>> your python libs wherever you want, and just make sure this wherever
>> is in your python path (usually via the PYTHONPATH environment
>> variable).
>>
> 
> again, in a shared environment, you don't have access to environment 
> variables.

Depends on the "shared environment". But even if you can't set 
PYTHONPATH, you can always import sys and append (or prepend) to 
sys.path before doing any other import.

 > all you can do is copy files in your own little directory,
> and that's it. this directory is never something like /share/python, but 
> something like /home/averagejoe. and /home/averagejoe is not usually in 
> the PYTHONPATH
> 
>>>> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
>>>> and fast.
>>> woudl you suggest mako over cheetah?
>>
> 
>> As far as I'm concerned, I would.  Now if you're looking for a
>> somewhat barebone MVC framework, you may want to have a look at
>> web.py.
>>
> 
> i've tried mako. sees to work fine for me, both for its potential and 
> for its "installation" method. in fact i just copied it under my own 
> directory
> 
> /home/averagejoe
>   test.py
>   /mako
>     mako stuff
> 
> and the following testcase worked well:
> 
> from mako.template import Template
> mytemplate = Template("hello world!")
> print mytemplate.render()
> 
> can i do the same with web.py?

Can't tell, never used it. But how to deploy it is very certainly 
documented on the project's page.

> mind that i work under an apache 
> environment (mod_python).

mod_python ? Fine. And, if I may ask, did you actually took time to read 
the FineManual(tm) ?-)

http://www.modpython.org/live/mod_python-3.3.1/doc-html/dir-other-pp.html


> now, back to mako. can you provide an example of blocks and nested 
> blocks in mako? the documentation doesn't seem to be too clear in this 
> reguard.
> 
> for example, if i want to show a table with a list of restaurants 
> (gathered from a db query), i can construct a template like this:
> 
> <table>
> % for rest in restaurants:
>   <tr>${rest}<tr>
> % endfor
> </table>
> 
> but what if if each restaurant has a list of dishes (pasta, pizza, meat, 
> pie)

Depends... What kind of object is 'rest' ? How is this list named ?

> and some (or each) dish has the ingrediets?

Same question.

> is it just like 
> embedding pure python into the template ( like $(rest['dish'])  and 
> $rest['dish']['ingredient']) )?

What goes inside ${} are ordinary Python expressions, yes.



From sprinkles.chris at gmail.com  Sat May 10 01:13:48 2008
From: sprinkles.chris at gmail.com (Chris Sprinkles)
Date: Sat, 10 May 2008 01:13:48 -0400
Subject: How to call a file
Message-ID: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>

I'm still having trouble with calling a text file and I know its so simple
here is the code
----------------------------------------------------
work = open('C:\Documents and Settings\Administrator\My
Documents\Chris\Python\Python\work.txt', 'r')
for line in work.txt:
    print line
-----------------------------------------------------
Ok so I know that the directory is right cause I'm not a complete idiot but
I keep getting an error? What am I missing here?
-Chris-
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From vbgunz at gmail.com  Wed May 14 12:21:10 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 09:21:10 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
Message-ID: <0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>

> > Instance methods make the most sense. A static method makes sense too
> > *but* I can see how a class method not only does what a static method
> > does but how a class method *also* gets the cls reference for free.
>
> I don't understand the last part - but I certainly agree on the "instance
> methods make the most sense". But *if* you want a hierarchy
> of "sensefulness",
>
> method > classmethod > staticmethod

OK, I am sold. If in case I find myself needing a static-method, I'll
simply make it a class-method instead. One thing that stuck out from
earlier and I'll compare it to linking is the "relative" usefulness of
cls. There are 2 conditions I can immediately come up with. 1, rename
the class and the class method still works. 2, move the method from
working on one particular class and it'll most likely work unchanged
(w/ the same interface) in another.

Other than the 2 reasons above (2 making more sense), what is a really
good reason to pull out the class method. In other words, when you see
one, what is the first thing that comes to mind? When you write one,
what was the first thing on your mind? Other than "similar to static-
methods", at what point will you be glad you used one? To sum it up,
what is the best role for a class-method that does not turn your work
into code-soup?



From andre.roberge at gmail.com  Wed May 21 19:20:33 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Wed, 21 May 2008 16:20:33 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
Message-ID: <a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>

On May 21, 8:13 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> I'm not sure if Python can do this, and I can't find it on the web. So,
> here it goes:
>
> try:
>     some_function()
> except SomeException:
>     some_function2()
>     some_function3()
>     ...
>     # somehow goto 'try' block again
>
> In case it's not clear what I meant: after executing some_function()
> exception SomeExcpetion gets risen. Then, in except block I do something
> to fix whatever is causing the exception and then I would like to go back
> to try block, and execute some_function() again. Is that doable?

How about something like the following (untested)

done = False
while not done:
  try:
     some_function()
     done = True
  except:
     some_function2()
     some_function3()

Andr?


>
> Thanks.
>
> --
>  _______                                        Karlo Lozovina - Mosor
> |   |   |.-----.-----.     web:http://www.mosor.net|| ICQ#: 10667163
> |       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
> |__|_|__||_____|_____|



From Marcohornung at hotmail.com  Wed May 28 07:25:30 2008
From: Marcohornung at hotmail.com (Marco Hornung)
Date: Wed, 28 May 2008 04:25:30 -0700 (PDT)
Subject: BeautifulSoup: problems with parsing a website
Message-ID: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>

Hy guys,

I'm using the python-framework BeautifulSoup(BS) to parse some
information out of a german soccer-website.
I spend some qualitiy time with the BS-docs, but I couldn't really
figure out how to get what I was looking for.

Here's the deal:
I want to parse the article shown on the website. To do so I want to
use the Tag " <div class="txt_fliesstext">" as a starting-point. When
I have found the Tag I somehow want to get all following "br"-Tags
until there is a new CSS-Class Style is coming up.
I tried several options in the findAll()-command, but nothing seems to
work.(like: soup.findAll('br',attrs={'class':'txt_fliesstext'}, text
=True) - This one comes with a thound addtional Tag that I don't want
to have, or soup.findAll(attrs={'class':'txt_fliesstext'}) - This
gives me a much better Result, but in this case I only get some few
Tags, instead of all the Tags I want)

Any suggestions?
Thanks in advance!

Website:
http://www.bundesliga.de/de/liga/news/2007/index.php?f=94820.php
Some html-code of the website:
<div id="area_headline">
      <div class="txt_headline_red">Erst H?henflug, dann Absturz</
div>
    </div>
    <div id="area_fliesstext">
      <div class="txt_fliesstext_bold">Mit 28 Punkten stand der KSC
nach der Hinrunde sensationell auf Platz 6.</div>
      <br><br>
      <div class="txt_fliesstext">Doch in der R?ckrunde brachen
die Badener regelrecht ein und holten nur noch 15 Z?hler.<br />
<br />
43 Punkte reichten am Ende f?r den 11. Tabellenplatz, ein mehr
als respektables Ergebnis f?r einen Aufsteiger.<br />
<br />


From gabe at dragffy.com  Thu May 15 06:50:47 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:50:47 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<482c1226$0$28403$426a34cc@news.free.fr>
Message-ID: <loom.20080515T105038-896@post.gmane.org>

Bruno Desthuilliers <bruno.42.desthuilliers <at> websiteburo.invalid> writes:


> The problem here is that your first statement
> 
> #>>> tasks = [[]]*6
> 
> creates a list (task) containing 6 references to the *same* (empty) list 
> object. You can check this easily using the identity test operator 'is':
> 

> If you want 6 different list objects in tasks, you can use a list 
> comprehension instead:
> 
> #>>> tasks = [[] for i in range(6)]
> #>>> tasks
> [[], [], [], [], [], []]
> #>>> tasks[0].append(1)
> #>>> tasks
> [[1], [], [], [], [], []]
> 
> HTH
> --
> http://mail.python.org/mailman/listinfo/python-list

Hi Bruno

Thanks for clearing that up. Your example certainly works well, I will study
list comprehension a little more.

Many thanks

Gabriel






From bamytyvibop55 at hotmail.com  Wed May 21 20:51:10 2008
From: bamytyvibop55 at hotmail.com (bamytyvibop55)
Date: Wed, 21 May 2008 20:51:10 -0400
Subject: We have the most detailed Copies
Message-ID: <BLU128-DAV377CA9C411E6F14260504B7C60@phx.gbl>

We carry on the best Replica's

Every type and style

http://lyrolarugoz58.blogspot.com




From eduardo.padoan at gmail.com  Fri May 30 08:16:14 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 30 May 2008 09:16:14 -0300
Subject: should I put old or new style classes in my book?
In-Reply-To: <eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
Message-ID: <dea92f560805300516o10d61fa5l923608b73663c52@mail.gmail.com>

On Thu, May 29, 2008 at 3:06 PM, Jason <tenax.raccoon at gmail.com> wrote:
> I've got Python 3.0 alpha 2.  In this version, it looks like you can
> define classes in either the old style or new style.  (I snipped the
> top line a bit in the following example):

Wrong. Py3k Classes are always new-style. They subclass object
implicitly when no superclass is given.

> Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
> Type "help", "copyright", "credits" or "license"
>>>> class one(object): pass
> ...
>>>> class two: pass
> ...
>>>> two
> <class '__main__.two'>
>>>> one
> <class '__main__.one'>
>>>> type(one)
> <type 'type'>
>>>> type(two)
> <type 'type'>
>>>>

Both classes are new style.


-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From arnodel at googlemail.com  Fri May 16 17:02:28 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 22:02:28 +0100
Subject: namespaces and eval
References: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>
Message-ID: <m24p8y7yjf.fsf@googlemail.com>

dave.g1234 at gmail.com writes:

> Sorry for the repost, didnt' quite finish
>
> Suppose I have a function in module X that calls eval e.g,
>
> X.py
> _______
> Def foo(bar):
>         Eval(bar)
> _______
>
> Now eval will be called using the default eval(bar,globals(),locals())
> and globals will pull in anything in module X.
>
> Now I have module Y that calls bar like so
> Y.py
> ________
> from x import *
> def biz():
>         print "Im a silly example!"
> Foo("biz()")
> _______
>
> Python will complain that it cannot find biz because it's not the X
> module.
>
> My question - is there any way to a) get a listing of active namespaes
> search ALL active namespaces for a particular variable

sys.modules gives you all the live modules.

> b) get the namespace of the caller withing passing it in (here, Y)

sys._getframe(1).f_globals (resp. sys._getframe(1).f_locals) gives you
the caller's globals (resp. locals).

> c) do anything else to get biz without passing
> foo("biz()",locals(),globals()) or hacking biz into the __builtin__
> namespace(don't know if it's even possible, but it defeats the
> purpose of what I'm trying to do) ?

Functions in Python are objects like any other, and can be passed as
parameters.  I.e:

x.py
----------
def foo(bar):
    bar()

>>> from x import foo
>>> def biz(): print "Boo!"
>>> foo(biz)
Boo!
>>>
 

> I realize this is here for a reason, but I'm working on something
> that's kind of a hack already
>
> Thanks
> dave
>
>
> More gratuitous context. Long story I'm trying to write a hack for a
> concise way of adding arbitrary methods to objects for JPA/JQuery like
> chaning eg.
>
> def foo(self):
>     print "foo"
>     return self;
>
> wrap(x).foo().foo().foo().foo() etc....

What about a composition function instead? I.e.

compose(foo, foo, foo, foo)(x)

Here's one that I made earlier:
http://www.marooned.org.uk/~arno/python/compose.html

[snip]

-- 
Arnaud


From kyrie at uh.cu  Fri May  9 01:11:32 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 09 May 2008 01:11:32 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
	<1210306536.4823cfe8be627@comuh.uh.cu>
	<3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>
Message-ID: <1210309892.4823dd04b2924@comuh.uh.cu>

Quoting Ian Kelly <ian.g.kelly at gmail.com>:

> On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
> >  Weird, I can't find neither... (which wikipedia article? Couldn't find one
> about
> >  C99.)
> 
> Try http://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power

Thanks!
Interesting reasoning... both ways ("undefined" for real exponents, 1 for
combinatory/set-theory). It would be way too confusing to have 0**0=1 and 0**0.0
undefined, so I guess is best to follow convention.

[now, I would really like to see 0/0=nan...]

-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie
--
"Al mundo nuevo corresponde la Universidad nueva"
UNIVERSIDAD DE LA HABANA
280 aniversario 


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:51:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:51:06 -0300
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <op.ua29rgcwx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:28:03 -0300, <dannywebster at googlemail.com> escribi?:

> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
>>>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'

You meant readlines(), I presume. A file acts as its own iterator:

f=os.open("./get_hostnames")
try:
   for line in f:
     # do something with line
finally:
   f.close()

-- 
Gabriel Genellina



From stef.mientki at gmail.com  Sat May 24 06:00:01 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 12:00:01 +0200
Subject: SQLite import fails sometimes ?
Message-ID: <4837E721.7000108@gmail.com>

hello,

The import statement "import sqlite3" gives the error given below.
In simple programs, the import statement (sometimes) succeed,
and I can indeed access the database.
So I guess there is some conflict with another part of my program,
but as the program is rather large (and dynamic) it's not easy to 
isolate the problem.
Does anyone has a clue how to trace this kind of problem ?

thanks,
Stef

Traceback (most recent call last):
  File "bricks\brick.py", line 322, in Exec
    self.Generate_Output_Signals ()
  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
    import sqlite3
  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
    from dbapi2 import *
  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ImportError: DLL load failed: Invalid access to memory location.


From arnodel at googlemail.com  Sat May 10 04:06:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 10 May 2008 09:06:17 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<op.uawq8posev04yd@hungvista>
Message-ID: <m2iqxm4m86.fsf@googlemail.com>

"Kam-Hung Soh" <kamhung.soh at gmail.com> writes:

> On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:
>
>>> > What would be the best method to print the top results, the one's that
>>> > had the highest amount of anagrams??  Create a new histogram dict?
>>>
>>> You can use the max() function to find the biggest list of anagrams:
>>>
>>> top_results = max(anagrams.itervalues(), key=len)
>>>
>>> --
>>> Arnaud
>>
>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>> lists?  Is there a way to specific top three w/ a max command??
>>
>
> Built-in max() function only returns one result.
>
> My solution is to make a sorted list and return last three items:
>
> sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]

Using the key= parameter of sorted() beats explicit DSU:

sorted(anagrams.itervalues(), key=len)[-3:]

Or even

sorted(anagrams.itervalues(), key=len, reverse=True)[:3]

-- 
Arnaud


From hdante at gmail.com  Mon May 19 11:21:08 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 08:21:08 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org> 
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com> 
	<mailman.1343.1211203732.12834.python-list@python.org>
Message-ID: <75dc8fc3-aef0-44ee-a6df-059f8cd2e226@d45g2000hsc.googlegroups.com>

On May 19, 10:28?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
>
> I don't think that it is important. But if you are interested:
>
> - yes, the server will probably be I/O bound, not CPU bound
> - I'm have experience with thread programming, but not with twisted

 That part was just to show you that being multithreaded is not really
a requirement. The server could be single-threaded, for example.
Surely, if you are comfortable with writing a threaded server, there's
no problem with that.

>
> No. "Image binary data -> base64encode -> XML -> gzip" - looks very
> silly. It cannot be efficient. Do you have better ideas?>> BTW I do not care about the

 Okay, that would be silly. The questions above considered that you
would be sending typical unserialized objects that would be serialized
to XML, not pre-serialized binary data.

> use it. The server is different: it must be safe against external
> attacks. Maybe it was my bad English? Sorry for the misunderstanding.> ?In general I

 That part was a joke. You didn't have to answer that. :-P

> I cannot predict "acceptable speed" requirements, but I can tell that
> there will be some clients downloading 100MB report files from the
> server, so I presume that I will need a progress bar. I think that I
> need to develop my own protocol for this, and probably the underlying

 Okay, so you need to wrap large binary files in some kind of message,
without pre processing them. I think developing your own protocol
using XDR is a safe bet.

> layer should use binary representation.>> Before I start re-inventing the wheel:

 If you are worried about not reinventing the wheel, there are a
couple of solutions I can think of. None of them seem to fully support
you security and session management requirements, so you should
estimate the required project/development time for them.

 - You may create a standard web application for that (with Django ?).
Binary transfers simply use HTTP and have trivial overhead. You have
to implement security and session management (cookies ?) on top of
that.

 - Subclass BaseHTTPServer to implement a stateful and secure
protocol. Again, binary transfers have trivial overhead.

 - If the goal of the project is to provide versioned file support,
you could use a dpkg/apt (or RPM?) based installation system (it uses
HTTP and FTP for file transfers). Write trivial front-ends in the
client and the server and choose a secure HTTP server.

 - Finally, if you want to create your own protocol, but don't want to
use XDR, you could to a similar thing using MIME based messages (the
first message part is a XML message that references the binary
attachments).

> It is NOT the best way. Just to tell one example: big endian / little
> endian integers. Definitely I need some encoding.

 Huh ? XDR does exactly that.

>
> (But if you are right and this is the best way, why would you avoid?)

 I would avoid packing/unpacking objects by hand.



From Since_humans_read_this_I_am_spammed_too_much at spamyourself.com  Fri May 23 07:37:38 2008
From: Since_humans_read_this_I_am_spammed_too_much at spamyourself.com (Erwin Moller)
Date: Fri, 23 May 2008 13:37:38 +0200
Subject: php vs python
In-Reply-To: <48369413$0$25059$607ed4bc@cv.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <4836ac7b$0$14350$e4fe514c@news.xs4all.nl>

Andrew Lee schreef:
> notbob wrote:
>> I'm not posting this just to initiate some religious flame war, though 
>> it's
>> the perfect subject to do so.  No, I actaully want some serious advice 
>> about
>> these two languages and since I think usenet is the best arena to find 
>> it,
>> here ya' go.
>>
>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  
>> Yet, I
>> want learn the guts of it instead of just booting up some wordwank or
>> whatever.  I started to learn python, but heard php was easier or 
>> faster or
>> more like shell scripting or... fill in the blank.  Anyway, so I 
>> change over
>> to learning php.  Then I run across that blog, Coding Horror, and start
>> reading articles like this:
>>
>> http://www.codinghorror.com/blog/archives/001119.html
>>
>> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
>> much.  I can setup mysql and apache,, but don't know how to use 'em, 
>> really.
>> I use emacs and run slackware and can fumble my way through bash scripts,
>> but I can't really write them or do lisp.  I've taken basic basic and 
>> basic
>> C, but am barely literate in html.  Sometimes it seems overwhelming, 
>> but I
>> persevere because it's more fun/challenging than video games, which 
>> bore me
>> to tears. 
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
>> Would I be better served in the long run learning python, which claims 
>> to be
>> easy as pie to learn/program (still looks hard to me).  I admit I'm no 
>> code
>> geek.  But, I'm not completely brain dead, either, and I need 
>> something to
>> keep my geezer brain sparking.  What say ye?
>>
>> nb
> 
> Personally, I believe PHP would get you more productive more quickly for 
> a blog, but it is a potentially brain damaging language in terms of 
> really getting your juices flowing with programming.  It is not a 
> general purpose language and suffers from all the limitations of of a 
> tool designed for one job.  If you are interested in programming and the 
> blog is your path to that, stick with Python!  In particular, immerse 
> yourself in mod_python or look at a framework like Django or Pylons -- 
> the learning curve is steep for any of these technologies but they are a 
> full meal compared to saltine cracker and water of PHP.

Some statement Andrew.
Care to clarify that a little?
I don't know much Python (aside from a little in ZOPE), but I did a lot 
of Java, Perl, VB/ASP (juck), and a little C before I learned PHP.
I stopped using all in favor of PHP.

If your statement says PHP is abused a lot, yes. Because it is 
relatively easy to learn for new programmers, a lot of bad PHP coders 
exist.
But I saw them too in Java/Perl/etc.
And I am sure you can find them too coding Python.

It is perfectly possible to write clean good code in PHP.

Why do you say it 'tastes less' then Python?
I don't want to start a religious war, but am curious.
Who knows, maybe  I'll dump PHP and start using Python after your 
answer. ;-)

Regards,
Erwin Moller


From netizen at gmx.de  Fri May 23 08:07:12 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 14:07:12 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <nsbd349tlkc5o7h280f71h7aoov1vnavon@4ax.com>

.oO(Andrew Lee)

>Personally, I believe PHP would get you more productive more quickly for 
>a blog, but it is a potentially brain damaging language in terms of 
>really getting your juices flowing with programming.  It is not a 
>general purpose language

Please elaborate.

>and suffers from all the limitations of of a 
>tool designed for one job.

Please elaborate.

And what "one" job are you talking about? There are many things possible
with PHP: web apps, shell scripts, daemons, GUI apps ...

>If you are interested in programming and the 
>blog is your path to that, stick with Python!

<flame>Where whitespace is more important than the code.</flame>

Seriously, it's just a question of personal taste and preferences. In
terms of capabilities there's absolutely no difference between PHP and
Python. You need a good understanding of programming in general for
both, the rest is just syntax and the available standard libraries.

>In particular, immerse 
>yourself in mod_python or look at a framework like Django or Pylons -- 
>the learning curve is steep for any of these technologies but they are a 
>full meal compared to saltine cracker and water of PHP.

If you don't like PHP, that's perfectly OK. But you should accept that
it's only a tool and just as good as the one who uses it. For me and
many others it's a quite good language, we're able to write clean and
efficient code with it in a rather short time.

PHP is much more than just crackers and water. Of course you should know
how to cook.

Micha


From ivan.illarionov at gmail.com  Tue May 27 22:45:44 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 02:45:44 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
	<g1iem8$r5$3@news.mtu.ru>
	<nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>
Message-ID: <g1ih0n$1lj$1@news.mtu.ru>

On Tue, 27 May 2008 22:27:40 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
>> 
>>> Ivan Illarionov wrote:
>>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>>
>>>>> Greetings, Ivan Illarionov.
>>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>>
>>>>>>> As I've said before - good programmers can write good code in any
>>>>>>> language.
>>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>>> and easier in another.
>>>>> It's obvious lie. If you have clear mind and you know language
>>>>> you're using, there are absolutely NOTHING can deny you to write
>>>>> clear code. Even using forth postfix notation, I have no problem
>>>>> writing good code, it's as easy as writing bad code. And yes, I do
>>>>> see the difference.
>>>> No. Language does matter.
>>> Not for a good programmer.  Only for half-assed ones.
>> 
>> No. Language does matter
> 
> Only to half-assed programmers.  Good programmers can write good code in
> any language they know.
> 
> Ever seen good assembler?  It can be done - really!  Also fortran,
> cobol, forth... the list goes on.

Yeah,
mov eax, Jerry
mov killfile, eax


From d3vvnull at gmail.com  Thu May  1 08:08:22 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 1 May 2008 07:08:22 -0500
Subject: Is vs Equality Operator
In-Reply-To: <48198915.3020804@islandtraining.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
	<48198915.3020804@islandtraining.com>
Message-ID: <170543c70805010508h155470b5mfee31718d61fdf19@mail.gmail.com>

'is' tests for identity (variable references the same memory location) while
'==' tests for equality.  Though it's probably best to use 'is' with more
complex classes and not the simpler built-in types like integers.
See how 'is' works for lists below:

>>> l1 = [1,2,3,4]
>>> l3 = [1,2,3,4]
>>> l1 == l3
True
>>> l1 is l3
False
>>> l2 = l1
>>> l1 is l2
True

l1 and l3 are equal because they contain the same elements. But they are not
identical because they reference different list objects in memory.  On the
other hand, l1 and l2 are identical, so using 'is' in this case tests True.

'is' will be true of the objects tested have the same address in memory.

On Thu, May 1, 2008 at 4:10 AM, Gary Herron <gherron at islandtraining.com>
wrote:

> Good Z wrote:
>
> > Hello,
> > I am having problem in using is. Here is what i am doing.
> >
>
> Short answer:  Use == for equality.    Don't use "is".  Ever!  (Especially
> if you are a newbie.)
>
> Longer answer:  In a dozen years of programming Python, the only time I
> use "is" is when testing for something like  if x is None
> but, even then
>  if x == None
> works just as well, and in any case, there is usually a better way.  (See
> below.)
>
> Don't use "is" until you can explain the following
> >>> 11 is 10+1
> True
> >>> 100001 is 100000+1
> False
>
>
>
> > x=''
> > if x is None or x is '':
> >        return 1
> >
>
> Both None and an empty string (and empty lists, empty dictionaries, empty
> sets, and numeric values of 0 and 0.0) all evaluate a False in an if
> statement, so the above if statement can be written as
>
>  if not x:
>     return 1
>
> If you have to test for None, just do
>  if not x:
>
> If you have to differentiate between a value of None and something that
> evaluates to False (e.g., and empty list) then do
>  if x is None:
>   # handle None explicitly
>  elif not x:
>   # handle empty list
>
>
> > The above statement does not return value 1.
> >
> > If i changed the above check to
> > if x == None or x == '':
> >        return 1
> > Now it works fine.
> >
> > Any idea. What is happening here. I am using python 2.4.4 on ubuntu.
> >
> > Mike
> >
> > ------------------------------------------------------------------------
> > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try
> > it now. <
> > http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20>
> >
> > ------------------------------------------------------------------------
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From tjreedy at udel.edu  Fri May  9 16:17:25 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 16:17:25 -0400
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <g02bgi$oes$1@ger.gmane.org>


"grbgooglefan" <ganeshborse at gmail.com> wrote in message 
news:fcdd681d-7786-4a09-8ba6-a2865352dfa1 at k10g2000prm.googlegroups.com...
|I am creating functions, the return result of which I am using to make
| decisions in combined expressions.
| In some expressions, I would like to inverse the return result of
| function.
|
| E.g. function contains(source,search) will return true if "search"
| string is found in source string.
| I want to make reverse of this by putting it as:
| if ( ! contains(s1,s2) ):
|     return 1
|
| I found that "!" is not accepted by Python & compile fails with
| "invalid syntax".
| Corresponding to this Boolean Operator we've "not" in Python.
|
| How can I make "not" as "!"?

1. Download, edit, and compile Python source code.
Perhaps substituting '!' for 'not' in the grammar file will suffice.
I do not *think* that this would conflict with '!=' digraph.
2. Realize that code for your custom Python will not work anywhere else if 
it does contain '!' with that meaning.





From kyosohma at gmail.com  Mon May  5 09:06:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 5 May 2008 06:06:32 -0700 (PDT)
Subject: Where are Tkinter event.type constants defined?
References: <4a428d7d-1ec9-4383-a543-98bd725cfbb1@d19g2000prm.googlegroups.com>
Message-ID: <2aa25b13-4790-4ca6-989c-069341b995e7@y38g2000hsy.googlegroups.com>

On May 4, 7:22?pm, Noah <n... at noah.org> wrote:
> I'm trying to match against Event.type for KeyPress and ButtonPress.
> Currently I'm using integer constants (2 and 4). Are these constants
> defined anywhere? The docs talk about KeyPress and ButtonPress, but I
> don't see them in any of the Tkinter source files. Are these just
> magic values that come out of the TK side of things and are not
> defined in Python? Code like this makes me think I'm doing something
> wrong:
>
> ? ? if event.type == 2:
> ? ? ? ? handle_key_press (event.char)
> ? ? elif event.type == 4:
> ? ? ? ? do_something_for_button ()
> ? ? else:
> ? ? ? ? pass # unknown event
>
> (I understand that usually you would bind these function so that they
> are called as a callback.)
>
> I don't mind defining the constants myself. I just want to make sure
> that I'm not missing something already done for me. Does anyone happen
> to have a complete list of Event.type constants?
>
> --
> Noah

Hey Noah,

I recommend checking out Lundh's site (effbot) since he has lots of
information on Tkinter there. Here's his Tkinter event page:

http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm

And there's this (less helpful):

http://docs.python.org/lib/node699.html

There's a whole chapter on events Grayson's Tkinter book, but I'm not
seeing constants defined. I think they might vary somewhat across
platforms anyway...but hopefully someone else more knowledgeable will
come along and address that.

Mike


From jcd at sdf.lonestar.org  Wed May 14 16:48:47 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Wed, 14 May 2008 16:48:47 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
	<482a190b@news.mel.dft.com.au>
	<654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>
Message-ID: <1210798127.6361.16.camel@aalcdl07.lib.unc.edu>

On Wed, 2008-05-14 at 13:27 -0700, bruno.desthuilliers at gmail.com wrote:
> On 14 mai, 00:41, John Machin <sjmac... at lexicon.net> wrote:
> (snip)
> > IIRC the idea was so that managers could write programs in English. It
> > failed because nobody could write a parser that would handle something
> > like "The bottom line is that the stakeholder group requires the
> > situation going forward to be such as to facilitate the variable known
> > as x to provide the same outcome when stimulated by dereferencing as the
> > variable known as y".
> 
> John, I usually don't agree much with both what you say and how you
> say it, but I must admit that this one is, well... just brillant !-)
> 
> (IOW: rofl, keyboard, and +1 QOTW)
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Agreed.  Best.  Synonym.  EVAR.  

(I won't give away the fun by saying what it's a synonym for)

Cheers,
Cliff




From timr at probo.com  Sat May 31 16:21:57 2008
From: timr at probo.com (Tim Roberts)
Date: Sat, 31 May 2008 20:21:57 GMT
Subject: Using PEFile to replace Images in PE EXE
References: <46f79833-5ecb-4d20-91dd-25f9d0fc4a14@y38g2000hsy.googlegroups.com>
Message-ID: <jnc3445ihhs8f1ratjlh6jtrg722ure7la@4ax.com>

GeoffreyF67 <GMan67 at pduck.com> wrote:
>
>I am trying to script some image changes for multiple EXE files in
>linux.
>
>The problem I'm running across is that I haven't been able to find
>anything out there that can do this...until now.
>
>It *looks* like pefile (available at google code) would do the trick.

It would if Linux executables were PE files.  They aren't.  The usual Linux
executable format is called ELF.

What do you think you are going to do to these executable files?  I can
think of darned few legitimate reasons to modify an executable.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From christophberendes at gmail.com  Thu May  1 12:45:34 2008
From: christophberendes at gmail.com (chrisber)
Date: Thu, 1 May 2008 09:45:34 -0700 (PDT)
Subject: my module and unittest contend over commandline options...
Message-ID: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>

using the unittest module in Python 2.3.5, I've written some test code
that ends up with

if __name__ == "__main__":
    unittest.main()

Since I want to run this code in various environments, I'd initially
added some commandline options, e.g. to specify a configuration file
like so

     test.py -c devtest.conf
or
     test.py -c localtest.conf

etc.
However, unittest also looks for options on the commandline, and it
was complaining about unrecognized options and quitting.

I've poked around to see if I could delete the options my earlier code
consumed from the commandline buffer, before invoking unittest, but
that seems klugy. Instead, I hardwired  in a testing config file name,
that always has to be local. That works pretty well, but it leaves me
wonderfing whether there would have been another clean way to allow
both my test code and unittest to have options without interfering
with one another.


From deets at nospam.web.de  Wed May 28 17:24:45 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:24:45 +0200
Subject: Threads and import
In-Reply-To: <b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
Message-ID: <6a60t2F35v9uuU1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> rsoh.woodho... at googlemail.com schrieb:
>>
>>
>>
>>> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>>> rsoh.woodho... at googlemail.com schrieb:
>>>>> Hi,
>>>>> I'm trying to work out some strange (to me) behaviour that I see when
>>>>> running a python script in two different ways (I've inherited some
>>>>> code that needs to be maintained and integrated with another lump of
>>>>> code). The sample script is:
>>>>> # Sample script, simply create a new thread and run a
>>>>> # regular expression match in it.
>>>>> import re
>>>>> import threading
>>>>> class TestThread(threading.Thread):
>>>>>     def run(self):
>>>>>         print('start')
>>>>>         try:
>>>>>             re.search('mmm', 'mmmm')
>>>>>         except Exception, e:
>>>>>             print e
>>>>>         print('finish')
>>>>> tmpThread = TestThread()
>>>>> tmpThread.start()
>>>>> tmpThread.join()
>>>>> import time
>>>>> for i in range(10):
>>>>>     time.sleep(0.5)
>>>>>     print i
>>>>> # end of sample script
>>>>> Now if I run this using:
>>>>> $ python ThreadTest.py
>>>>> then it behaves as expected, ie an output like:
>>>>> start
>>>>> finish
>>>>> 0
>>>>> 1
>>>>> 2
>>>>> ...
>>>>> But if I run it as follows (how the inherited code was started):
>>>>> $ python -c "import TestThread"
>>>>> then I just get:
>>>>> start
>>>>> I know how to get around the problem but could someone with more
>>>>> knowledge of how python works explain why this is the case?
>>>> Works for me. And I don't see any reason why it shouldn't for you -
>>>> unless you didn't show us the actual code.
>>>> Diez
>>> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
>>> on Ubuntu 7.10. Which version of python/what platform were you using?
>> mac-dir:/tmp deets$ python
>> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
>> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>> Welcome to rlcompleter2 0.96
>> for nice experiences hit <tab> multiple times
>>  >>>
>>
>> But I doubt this changes anything.
>>
>> Diez
> 
> Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
> Python 2.4.5 on Debian and get the same results as I had before.

Are you sure that ThreadTest isn't a somewhere else installed module? 
youc can use python -v to check where python gets it's files.

and how about you attach/paste the full script somewhere?

Diez


From bignose+hates-spam at benfinney.id.au  Fri May 16 19:53:28 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 17 May 2008 09:53:28 +1000
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <87d4nlst53.fsf@benfinney.id.au>

Terry <terry.yinzhe at gmail.com> writes:

> Is there a simple way to get all the instances of one class?

Define "all". All the instances in the current scope?

Perhaps more pertinent: What problem are you trying to address?

-- 
 \         ?We demand rigidly defined areas of doubt and uncertainty!? |
  `\            ?Vroomfondel, _The Hitch-Hiker's Guide To The Galaxy_, |
_o__)                                                    Douglas Adams |
Ben Finney


From frank at niessink.com  Sun May 11 11:27:26 2008
From: frank at niessink.com (Frank Niessink)
Date: Sun, 11 May 2008 17:27:26 +0200
Subject: Problem with custom events in wxpython
In-Reply-To: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
Message-ID: <67dd1f930805110827h2631efecl3f49744a2eb5de0d@mail.gmail.com>

Hi Jimmy,

2008/5/11 Jimmy <mcknight0219 at gmail.com>:
> hi, all
>
> I'm having a problem with creating custom events in wxpython.
>
> I have a class A handling some data processing work and another class
> B of GUI matter. I need GUI to display information when data in A is
> updated.
> I know cutom events in wxpython may work.

You may want to look at the pubsub module. Available as wx.lib.pubsub
in wxPython: http://www.wxpython.org/docs/api/wx.lib.pubsub-module.html,
and also available separately on PyPI:
http://pypi.python.org/pypi/PyPubSub/

Cheers, Frank


From castironpi at gmail.com  Fri May  9 04:11:02 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 01:11:02 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org>
Message-ID: <c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>

On May 9, 1:23?am, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Wed, May 7, 2008 at 5:29 PM, Yves Dorfsman <y... at zioup.com> wrote:
> > Is there a way to do:
> > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> > x[0,2:6]
>
> > That would return:
> > [0, 3, 4, 5, 6]
>
> > I am surprised this notation is not supported, it seems intuitive.
> > A concrete example of the sort of thing I want to do:
>
> > p = file('/etc/passwd').readlines()
> > q = [ e.strip().split(':')[0,2:] for e in p ]
>
> > (getting rid of the password / x field)
>
> Have a look at the itemgetter function from the operator module.
>
> g = itemgetter( 0, *range(2, 6) )
> p = file("/etc/passwd").readlines()
> q = [ g( e.strip().split(':') ) for e in p ]

The only thing is, is there is another natural meaning to [a,b:c].

Counting grids on the diagonals, the rational set is well defined:

0: 0, 0
1: 1, 0
2: 0, 1
3: 2, 0
4: 1, 1
5: 0, 2
6: 3, 0
7: 2, 1
...

Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined.  Thencefore,

a,b:c,d

is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].


From marek.rocki at wp.pl  Wed May 21 12:32:57 2008
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: Wed, 21 May 2008 09:32:57 -0700 (PDT)
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
Message-ID: <5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>

Neal Becker napisa?(a):
> In an earlier post, I was interested in passing a pointer to a structure to
> fcntl.ioctl.
>
> This works:
>
> c = create_string_buffer (...)
> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
> err = fcntl.ioctl(eos_fd, request, args)
>
> Now to do the same with ctypes, I have one problem.
>
> class eos_dl_args_t (Structure):
>     _fields_ = [("length", c_ulong),
>                 ("data", c_void_p)]
> ...
> args = eos_dl_args_t()
> args_p = cast(pointer(args), c_void_ptr).value
> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>
> That last may fail, because .value creates a long int, and ioctl needs a
> string.
>
> How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
> 0-terminate string, because the structure may contain '0' values.

Hello. I'm not completely sure what your problem is ("may fail" is not
a good description. Does it fail or does it not?). If you want a
pointer to a structure as the third argument to ioctl, this would be
imho the easiest way to do it with ctypes:

> class eos_dl_args_t(Structure):
>     _fields_ = [("length", c_ulong), ("data", c_void_p)]
> args = eos_dl_args_t()
> fcntl.ioctl(fd, request, byref(args))

Regards,
Marek


From nospam at nospam.com  Mon May 26 09:57:05 2008
From: nospam at nospam.com (Gilles Ganault)
Date: Mon, 26 May 2008 15:57:05 +0200
Subject: Recommended way to POST with cookies?
References: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
	<mailman.1147.1210838878.12834.python-list@python.org>
Message-ID: <9dgl34p2rva1gtucasg91se6vud95ihpgm@4ax.com>

On Thu, 15 May 2008 10:07:47 +0200, Laszlo Nagy <gandalf at shopzeus.com>
wrote:
>I just posted a recipe that you can try:
>
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/572202

Thanks!


From vdv100 at gmail.com  Sun May  4 10:25:21 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 15:25:21 +0100
Subject: Image grab in Python
Message-ID: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>

Hi,

anyone know a Python library to grab the size of a selected image region
(the selection will be made with the mouse), that work in Linux ?

I found a module to do that in the PIL library but only work in Windows -
http://www.pythonware.com/library/pil/handbook/imagegrab.htm

Thanks in advance.

Best regards,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org
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From gherron at islandtraining.com  Tue May 20 11:28:41 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 20 May 2008 08:28:41 -0700
Subject: Help with character encodings
In-Reply-To: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
Message-ID: <4832EE29.5020700@islandtraining.com>

A_H wrote:
> Help!
>
> I've scraped a PDF file for text and all the minus signs come back as
> u'\xad'.
>
> Is there any easy way I can change them all to plain old ASCII '-' ???
>
> str.replace complained about a missing codec.
>
>
>
> Hints?
>   

Encoding it into a 'latin1' encoded string seems to work:

  >>> print u'\xad'.encode('latin1')
  -




>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From bignose+hates-spam at benfinney.id.au  Mon May 12 01:20:29 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 15:20:29 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net>
Message-ID: <87od7c6qua.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Ben Finney wrote:
> 
> > John Salerno <johnjsal at gmailNOSPAM.com> writes:
> >
> >> num = 33
> >> 
> >> for x in xrange(10):
> >>     print num += 1
> >
> > Which is better done by 'num += 10'.
> >
> > Can you come up with an example that isn't trivially replaced with
> > clearer code? That might make it clearer what your concern is.
> 
> ::sigh:: No, unfortunately I don't have a strong enough grasp of
> Python to give a really in-depth example.

It need not be in-depth, merely illustrative of the problem being
addressed.

> I understand what you're asking though. Perhaps people don't use
> this idiom as much as I think they do, so to give a trivial example
> to support my point isn't helpful.

I think that the idiom

    for unused in xrange(10):
        # do stuff with no reference to 'unused'

is quite common. Is that what you're asking about?

> As far as I know, though, I think this is used often enough, so I
> thought I'd just ask if there are purists out there who don't like
> this use of the loop and feel it's an abuse of the syntax.

No, it seems quite a normal usage of the syntax and a good use of an
iterator.

With "do something N times", there must be *something* to keep track
of which iteration we're up to (or, equivalently, how many iterations
remain) at a given moment. A Python iterator seems a fine choice to
hold that information, and better than many alternatives.

-- 
 \     "My house is on the median strip of a highway. You don't really |
  `\    notice, except I have to leave the driveway doing 60 MPH."  -- |
_o__)                                                    Steven Wright |
Ben Finney


From skunkwerk at gmail.com  Sun May  4 23:33:12 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Sun, 4 May 2008 20:33:12 -0700 (PDT)
Subject: logger output
Message-ID: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>

i'm redirecting the stdout & stderr of my python program to a log.
Tests i've done on a simple program with print statements, etc. work
fine.  however, in my actual program i get weird output like this:

2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
if any
2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
from queue, if any
2008-05-04 20:20:44,790 DEBUG
DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any

followed by:
2008-05-04 20:20:44,815 DEBUG DEBUG:doit:Traceback (most recent call
last):
2008-05-04 20:20:44,815 DEBUG DEBUG:doit:DEBUG:doit:Traceback (most
recent call last):
2008-05-04 20:20:44,815 DEBUG
DEBUG:doit:DEBUG:doit:DEBUG:doit:Traceback (most recent call last):

the code I'm using for the log stuff:

import logging
logger = logging.getLogger('doit')
hdlr = logging.FileHandler('/home/imran/doit.log')
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
hdlr.setFormatter(formatter)
logger.addHandler(hdlr)
logger.setLevel(logging.DEBUG)

class write2Log:
	def write(self, x):
		if x!='\n':
			logger.debug(str(x))

sys.stdout = write2Log()
sys.stderr= write2Log()

any ideas what might be causing the problems?  some of the messages
being output are quite long - might this be a problem?

thanks


From hdante at gmail.com  Mon May 19 21:17:46 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:17:46 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
	<92857241-ef7c-482f-a7cb-8ee81edd8317@e53g2000hsa.googlegroups.com>
Message-ID: <cf8a878f-ea3c-4dec-8771-0aaa74b68ed3@a23g2000hsc.googlegroups.com>

On May 19, 5:46?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 19 mai, 17:53, Henrique Dante de Almeida <hda... at gmail.com> wrote:
>
> (snip)
>
> > ?Yes, I was actually referring to statically typed JIT-compiled
> > languages. Sorry about that, blame the beers that entered my digestive
> > system that night. :-P
>
> for beer in beers:
> ? if beer.entered_henrique_digestive_system_last_night:
> ? ? beer.blame()
>
> !-)

 ???

 beers += [Beer.random()]


From gagsl-py2 at yahoo.com.ar  Tue May 20 12:10:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 13:10:46 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>
Message-ID: <op.ubgm78f6x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 10:54:05 -0300, Agustin Villena  
<agustin.villena at gmail.com> escribi?:
> On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Agustin Villena schrieb:
>>
>> > is there anyway to show the class of amethodin an exception's
>> > traceback?
>> > I want to improve the line
>> > File "G:\dev\exceptions\sample.py", line 3, in foo
>> > to
>> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>
>> It should be. You can get a dictionary of the locals of an exception
>> stack frame, of which you could extract the self-parameter's class.
>
> I digged on sys.exc_info() object and the traceback module and I
> could't figure how I can get the locals() of the exception stackframe

Put this function in traceback.py, and replace the lines
         name = co.co_name
with
         name = guess_full_method_name(f)
everywhere.
Please read the docstring!!!

def guess_full_method_name(frame):
     """Guess classname.methodname for a given frame.

     Only a guess!
     Assumes the frame belongs to an instancemethod
     whose first argument is "self", or a classmethod
     whose first argument is "cls".
     Doesn't handle correctly any other situation.
     Returns the class name of the object on which
     the method was called, not the class where
     the method was actually defined.
     """
     cls_name = None
     fun_name = frame.f_code.co_name
     self = frame.f_locals.get('self', None)
     if self is None:
         cls = frame.f_locals.get('cls', None)
     else:
         cls = getattr(self, '__class__', None)
     if cls is not None:
         cls_name = getattr(cls, '__name__', None)
         if cls_name is not None:
             return '%s.%s' % (cls_name, fun_name)
     return fun_name

-- 
Gabriel Genellina



From pscott at uwc.ac.za  Mon May  5 10:21:53 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:21:53 +0200
Subject: Nested os.path.join()'s
Message-ID: <1209997313.7106.29.camel@paul-laptop>


Today, I needed to concatenate a bunch of directory paths and files
together based on user input to create file paths. I achieved this
through nested os.path.join()'s which I am unsure if this is a good
thing or not.

example:

if os.path.exists(os.path.join(basedir,picdir)) == True :
    blah blah

Question is, is there a better way of doing this? The above *works* but
it looks kinda hackish...

--Paul

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From afrobeard at gmail.com  Thu May 15 19:07:04 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:07:04 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
Message-ID: <1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>

The following proposed solution is not intended to be a solution, it
goes completely against the zen of python. [Type import this into the
python command interpreter]

I brought it down to two lines:-

l = range(6)
[1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]

itertools would still be a better approach in my opinion.

Just because I'm curious to know, can anyone bring it shorter[even if
its cryptic] than this without invoking any Python Library.

P.S. Once again I would not recommend using this as Explicit is better
than Implicit
P.P.S. It is strongly undesirable for us humans to use anything
starting with __ :)


On May 15, 5:10?pm, "Geoffrey Clements"
<geoffrey.clement... at SPAMbaesystems.com> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > | It seems that I rather frequently need a list or iterator of the form
> > | [x for x in <> while <>]
>
> > I can think of two ways to interpret that.
> >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> >> the expression <B> is false.
>
> def gen(a):
> ? ? for x in a:
> ? ? ? ? if B: break
> ? ? ? ? yield x
>
> a_gen = gen(A)
>
> # now iterate over a_gen
>
> --
> Geoff



From nick at craig-wood.com  Mon May  5 13:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 05 May 2008 12:30:03 -0500
Subject: get the pid of a process with pexpect
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
Message-ID: <slrng1uf67.nr7.nick@irishsea.home.craig-wood.com>

Karim Bernardet <bernardet at cppm.in2p3.fr> wrote:
>  Hi
> 
>  I am using pexpect to do ssh tunneling and to open a vnc server (jobs on 
>  a grid cluster). When the job is canceled, these 2 processes remain on 
>  the worker node (they are detached), so I have to kill them (using a 
>  trap command in the bash script of the job) but I need the pid of each 
>  process. I have tried to get it like this
> 
>  ssh_tunnel = pexpect.spawn (tunnel_command % globals())
>  ...
>  print ssh_tunnel.pid
> 
>  but ssh_tunnel is not the pid of the ssh tunnel
> 
>  Is there a way to get it using pexpect ?

If I understand you correctly what you need to do is run "echo $$" on
the remote shell then "exec tunnel_command".  The $$ will print the
pid and the exec will run tunnel_command without changing the pid.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From inhahe at gmail.com  Fri May 23 15:35:27 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:35:27 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net>
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
Message-ID: <p%EZj.19189$255.2014@bignews8.bellsouth.net>

"
I wish this worked:
>>> def main(a,b,*argv): pass
>>> options['argv'] = argv
>>> main(**options)
TypeError: main() got an unexpected keyword argument 'argv'
"
-----
I was thinking about that exact same thing actually.  Except that I was 
thinking you might want it like this, otherwise it could be ambiguous:

>>> def main(a,b,*argv): pass
>>> options['*argv'] = argv
>>> main(**options)

Weird I know, to put the * operator inside the string.  I suppose the 
necessity of doing that just shows why it wasn't implemented in the first 
place.  But still, it would be neat...

Also, of course, you could then do
main(*argv=[2,3])

or rather

main(*argv=[3,4],a=1,b=2) #in random order









From mcknight0219 at gmail.com  Fri May 23 11:27:06 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 08:27:06 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
Message-ID: <3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>

On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > Jimmy schrieb:
>
> > > On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> > >> Jimmy wrote:
> > >>> Hi to all
> > >>> python now has grown to a versatile language that can
> > >>> accomplish tasks for many different purposes. However,
> > >>> AFAIK, little is known about its ability of kernel coding.
> > >>> So I am wondering if python can do some kernel coding that
> > >>> used to be the private garden of C/C++. For example, can python
> > >>> intercept the input of keyboard on a system level? someone told me
> > >>> it's a kernel thing, isn't it?
> > >>http://wiki.python.org/moin/elmer
>
> > > well, straightly speaking, how can I know a key is pressed on a system-
> > > level if
> > > using python?
>
> > What has that todo with kernel programming? You can use e.g. pygame to
> > get keystrokes. Or under linux, read (if you are root) the keyboard
> > input file - I've done that to support several keyboards attached to a
> > machine.
>
> > And the original question: no, python can't be used as kernel
> > programming language. Amongst other reasons, performance & the GIL
> > prevent that.
>
> > Diez
>
> sorry, my aim is not limited to one particular program. Yes, many
> library can
> permit you to respond to keyboard event, however, what I want is a
> universal
> function. as long as a key is pressed, no matter where, my program can
> repond.
>
> I am quite strange with this topic. But according to my understanding,
> any event, keyboard event
> for example, once triggered, will be dilivered by keyboard driver to X
> system, and then
> any running program can either choose to respond or ignore. So my
> question can be translated to:
> how to make my program respond ?

maybe I'd better elaborate on my question. Back to my original
question:
intercept keyboard event on a system level. If you are writing program
in
 emacs, of course, the keyboard inputs are meant for emacs only. What
I
want is no matter what program you're running, keyboard events can be
anyway caught by my program.

Am I clear with myself? :)


From deets at nospam.web.de  Mon May 26 06:02:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 12:02:05 +0200
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
Message-ID: <69vg5qF34vemeU1@mid.uni-berlin.de>

Rohan wrote:

> Hi
> 
> I have python-CGIs for my web application running on apache 2.
> Few of the CGIs run for a long time.
> 
> When such a CGI is running and user presses "Stop" button of browser
> (or connection is aborted) how can I identify such situation and
> terminate
> the CGI.
> I don't want the CGI to complete the processing and terminate when it
> tries to write to client pipe.
> It would be good to terminate it as soon as client connection is
> aborted.
> 
> How can I achieve this?

The only way I can think of is to regularly output something inside the CGI,
and thus make it fail in the very moment the pipe is closed.

But I didn't try that myself - and if it doesn't work I don't think you
stand a chance, because that's the way sockets work - there is no
signalization beyond that, and even if it were it's not propagated across
CGI.

Diez


From notnorwegian at yahoo.se  Fri May 23 12:42:57 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 09:42:57 -0700 (PDT)
Subject: webspider, regexp not working, why?
Message-ID: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>

url = re.compile(r"^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]
{1}
([\w\-]+\.)+
([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?((\?\w+=\w+)?
(&
\w+=\w+)*)?")

why isnt this url catching something like:

<link rel="alternate" type="application/rss+xml" title="Python
Screencasts"
        href="http://www.showmedo.com/latestVideoFeed/rss2.0?
tag=python" />

site = urllib.urlopen("http://www.python.org")
for row in site:
    obj = url.search(row)
    if obj != None:
        print "url: ", obj.group()

i know it works because it can catch
www.hello.com in a txt-file and i can catch emails of websites with
another regexp.

search and match yields the same results.

but when you put something like href= in front of it it doesnt work.

i see now that it has to match the beginning of the row or something,
because:
hi www.google.com
doesnt match but
www.google.com  hi
matches.


i though a regexp would search a row/file and when it finds an
occurence report it, so a regexp of "lo" would match in lopez.


From cwitts at gmail.com  Tue May 27 04:54:46 2008
From: cwitts at gmail.com (Chris)
Date: Tue, 27 May 2008 01:54:46 -0700 (PDT)
Subject: python raycaster, pycaster, where?
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
	<mailman.1627.1211837219.12834.python-list@python.org>
	<0a414718-cf1b-40fd-8abb-8c4a3e51c743@8g2000hse.googlegroups.com>
Message-ID: <b6b937de-bcc2-4dcf-9cf3-4f11b4b5c782@b1g2000hsg.googlegroups.com>

On May 27, 3:03?am, notnorweg... at yahoo.se wrote:
> On 26 Maj, 23:26, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Mon, May 26, 2008 at 4:52 PM, ?<notnorweg... at yahoo.se> wrote:
> > > i tried googling this thing but couldnt find it. i cant find it in
> > > pyagme either.
>
> > Really?
>
> >http://www.google.com/search?q=pycaster
>
> > The first link has downloads for it.
>
> quite funny, the first post returns this posted on another forum ...
> and then the same links again.
>
> clicking any of the links that dont lead here ar eeither outdated or
> broken.

http://www.google.com/codesearch?q=package%3Apycaster&hl=en&btnG=Search+Code


From znfmail-pythonlang at yahoo.com  Wed May 14 14:35:25 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Wed, 14 May 2008 14:35:25 -0400
Subject: addendum Re: working with images (PIL ?)
Message-ID: <g0fbdf$jp$1@aioe.org>

I've put together some code to demonstrate what my goal is though looping 
pixel by pixel it's rather slow.

import Image

def check_whitespace():
    im = Image.open("\\\\server\\vol\\temp\\image.jpg")

    size = im.size

    i = 0
    whitePixCount = 0
    while i in range(size[1]):
        j = 0
        while j in range(size[0]):
            p1 = im.getpixel((j,i))
            if p1 == (255, 255, 255):
                whitePixCount = whitePixCount + 1
                if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
1404) / 4) 25%
                    return "image no good"
            j = j + 1
        i = i + 1

    print whitePixCount

    return "image is good"

print check_whitespace()


"Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>I need to write a program to examine images (JPG) and determine how much 
>area is whitespace. We need to throw a returned image out if too much of it 
>is whitespace from the dataset we're working with. I've been examining the 
>Python Image Library and can not determine if it offers the needed 
>functionality. Does anyone have suggestions of other image libraries I 
>should be looking at it, or if PIL can do what I need?
> 




From bronger at physik.rwth-aachen.de  Sat May  3 02:19:23 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 03 May 2008 08:19:23 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
Message-ID: <87lk2rsydw.fsf@physik.rwth-aachen.de>

Hall?chen!

Gabriel Genellina writes:

> [...]
>
> I can't believe some angry responses in this thread - it's just a
> technical question, not about which is the best team in the
> [preferred sports here] National Championship...

Well, Python-list is tunnelled to Usenet.  Welcome here.  ;-)

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From george.sakkis at gmail.com  Thu May 15 02:56:48 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 23:56:48 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<02de1dee-8416-47a8-8195-e344cae6d31f@k37g2000hsf.googlegroups.com>
Message-ID: <cafb7389-0bf9-4b56-a3d9-0dea1cf98fea@27g2000hsf.googlegroups.com>

On May 14, 4:38?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 14 mai, 16:30, George Sakkis <george.sak... at gmail.com> wrote:
>
> > On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > > An instance method works on the instance
> > > > A Static method is basically a function nested within a class object
> > > > A class method is overkill?
>
> > > If anything, a static method is overkill. See it this way: *if* you for some
> > > reason put a method into an enclosing context - isn't it worth having a
> > > reference to that?
>
> > My feeling exactly; these days I almost always use class methods
> > instead of static. I vaguely remember seeing somewhere an example
> > where a static method was the only (elegant) solution; neither a class
> > method nor a plain function would do. I'll post it if I find it unless
> > someone beats me to it.
>
> No concrete example here but I surely remember having used
> staticmethods in one case where I needed class-based polymorphic
> dispatch and eventually implementation inheritance (to get a default
> implementation) ?for something that didn't required access to the
> class object.

Yes, that's common, but a class method could be used just as well
here. I couldn't find the original example but IIRC it was related to
monkeypatching. Say that you have a package P1 that has some useful
classes:

    class A(object): pass
    class B(A): pass
    class C(A): pass

You also have an unrelated package P2 with some useful functions:

    def f1(): return 0
    def f2(): return 1

Naturally you want to combine these two. One common pattern when doing
so turns out to be like:

    # e.g. x = random.choice([A(), B(), C()])
    ...
    assert isinstance(x, A)
    if type(x) in (A,B):
        print f1()
    elif type(x) is C:
        print f2()

With a less trivial hierarchy and number of functions, it becomes
clear that it would help a lot if you could refactor it somehow so you
can just say "print x.f()" and it would do the right thing.
Monkeypatching it as a normal method ("A.f = f1; C.f = f2") doesn't
work because it expects self as the first argument, and similarly for
class methods and the cls argument. OTOH static methods do the trick:

    A.f = staticmethod(f1)
    C.f = staticmethod(f2)
    print x.f()

Admittedly it's not a common scenario but it's good to know it's there
if you need it.

George


From cokofreedom at gmail.com  Tue May  6 11:24:59 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 08:24:59 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <8f5d04d8-2ece-4e8b-9af9-eefec153d7bd@34g2000hsh.googlegroups.com>

On May 6, 5:20 pm, krumbleb... at gmail.com wrote:
> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.
>
> I know how to reverse a list (with the reverse method - very handy),
> but it doesn't seem possible to reverse a dict.
>
> I suspect what I need to do is somehow go from:
>
> thelist=list(thedict)
> thelist.reverse()
> thedict=dict(thelist)
>
> Does anyone know how to convert / or reverse a dict?
>
> thanks
>
> kb.

Issue 1: A dictionary is not ordered so cannot be reversed, as is.

Saw something like this though:

info = {"PHP":"17th May",
       "Perl":"15th June",
       "Java":"7th June",
       "Python":"26th May",
       "Tcl":"12th July",
       "MySQL":"24th May"}

topics = info.keys()
topics.sort()
topics.reverse()

for topic in topics:
   print "Next",topic,"course starts",info[topic]


From schickb at gmail.com  Mon May 12 20:35:44 2008
From: schickb at gmail.com (schickb)
Date: Mon, 12 May 2008 17:35:44 -0700 (PDT)
Subject: Popen pipe hang
Message-ID: <64cf0966-5e39-473c-8923-7a81ff99f905@u6g2000prc.googlegroups.com>

I'm trying to pipe data that starts life in an array('B') object
through several processes. The code below is a simplified example. The
data makes it through, but the wait() always hangs. Is there a better
way to indicate src.stdin has reach EOF?

from subprocess import Popen, PIPE
from array import array

arr = array('B')
arr.fromstring("hello\n")

src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
dst = Popen( ["cat"], stdin=src.stdout)
arr.tofile(src.stdin)
src.stdin.close()
dst.wait()


From mcknight0219 at gmail.com  Thu May 15 09:28:16 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 15 May 2008 06:28:16 -0700 (PDT)
Subject: create window on panel
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
	<mailman.1153.1210845280.12834.python-list@python.org>
	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
	<mailman.1158.1210851928.12834.python-list@python.org>
Message-ID: <70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>

On May 15, 7:45 pm, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > Thanks for your reply!
>
> > I am using Linux+gnome. Actually, what I want is simply a text-region
> > on the panel
> > and display some dynamic information on it. Is it hard to do it ?
>
> Google is your friend! I searched for "gnome python panel" and the first
> hit was:
>
> http://www.onlamp.com/pub/a/python/2000/07/25/gnome_applet.html
>
> :-)
>
> Of course it is out of date but you can see that there is something
> called "/PyGNOME".
> /
> The package names on my Linux:
>
> python-gnome2 python-gnome2-desktop python-gnome2-extras python-gnomecanvas
>
> Description:
>
> Python bindings for the GNOME desktop environment
> This archive contains modules that allow you to write GNOME programs
> in Python. This package contains the bindings for the new version 2.0
> of that desktop environment.
>
> URL:http://www.daa.com.au/~james/software/pygtk/
> /
> /It should be easy to read the docs, view the demo programs and create
> your own program.
>
> L

thanks~ it seems attractive, however, I did not find much useful
information :(


From needin4mation at gmail.com  Tue May  6 09:44:19 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Tue, 6 May 2008 06:44:19 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
Message-ID: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>

Studying OOP and noticed that Python does not have Interfaces.  Is
that correct?  Is my schooling for nought on these OOP concepts if I
use Python.  Am I losing something if I don't use the "typical" oop
constructs found in other languages (Java, C# come to mind.)  I'm
afraid that if I never use them I'll lose them and when I need them
for something beside Python, I'll be lost.  Thank you.


From jeffober at gmail.com  Mon May  5 07:48:29 2008
From: jeffober at gmail.com (Jeff)
Date: Mon, 5 May 2008 04:48:29 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
Message-ID: <3b460037-46ea-4944-9dc1-516666889da2@2g2000hsn.googlegroups.com>

ctypes?


From p.newbie at yahoo.com  Mon May  5 20:55:10 2008
From: p.newbie at yahoo.com (python newbie)
Date: Mon, 5 May 2008 17:55:10 -0700 (PDT)
Subject: listing computer hard drives with python
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
Message-ID: <423526.39216.qm@web45807.mail.sp1.yahoo.com>

Sorry, I forgot to copy the list.

Looks like you are doing this on Windows.  Windows has a built in command call fsutil that would work in this situation.  The syntax would be:

C:\Documents and Settings\username>fsutil fsinfo drives

Drives: C:\ D:\ E:\

To find out the type of drive you can use:

C:\Documents and Settings\username>fsutil fsinfo drivetype c:

c: - Fixed Drive

On a side note you can call an external command via:

import os
os.system('fsutil fsinfo drives')
os.system('fsutil fsinfo drivetype c:')

I hope this helps.

PS: I am not sure about the privileges  that are required to run fsutil.

Disclaimer: I am new to python and programming.  This may not be they python way of doing things.

Pete



Ohad Frand <ohad.frand at percello.com> wrote:                        Hi
  I am looking for a way to get a list of all active logical hard drives of the computer (["c:","d:"..])
   
  Thanks,
  Ohad
  
  --
http://mail.python.org/mailman/listinfo/python-list

       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.
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From inhahe at gmail.com  Wed May 21 10:46:30 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 10:46:30 -0400
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <DzWYj.78104$%15.65210@bignews7.bellsouth.net>

i always just put most of my python files in the c:\python25 directory. 
including ones i want to import as modules, since they import from there. 
otherwise you can put the file in c:\python25\lib\site-packages

"srinivas" <srinivas.puvvala at gmail.com> wrote in message 
news:2fc55c56-7408-4f44-b6e2-64f85f341ac9 at i36g2000prf.googlegroups.com...
> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
>
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
>
> pls help me friends how to do that. 




From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:49:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:49:15 +0200
Subject: python newbie: some surprises
In-Reply-To: <VHQUj.124646$Cj7.90968@pd7urf2no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <4824100b$0$5108$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
> Mensanator wrote:
>>> 2. python requires to pass "self" to all instance methods
>>
>> Who uses methods?
> 
> Is this a joke ?

Very probably.

> What are the alternatives ?

Err... functions ?-)



From fred.sells at adventistcare.org  Fri May 30 14:52:53 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Fri, 30 May 2008 14:52:53 -0400
Subject: PyDev multiple source files?
In-Reply-To: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0939@acesxch01.ADVENTISTCORP.NET>

the short answer is

a file is a module; therefore to 'include' access to 'myclass' in file xyz.py from another file called 'abc.py'  you would put this in abc.py

import xyz  #note no '.py'
x = xyz.myclass()
or
from xyz import myclass  #if you're lazy use ... import *
x = myclass()

see the basic tutorial on modules and importing

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of RossGK
> Sent: Friday, May 30, 2008 2:10 PM
> To: python-list at python.org
> Subject: PyDev multiple source files?
> 
> 
> Newbie questions on PyDev project setup.   Things are going fine -
> writing python code in eclipse/pydev and running them with various
> imports etc, doing wxpython stuff blah, blah, blah. My .py code is in
> a module, in a package, in a project. It runs fine.
> 
> Now I want to be able to break my single source file up into multiple
> files to segregate functions, divide up with others, etc, but I don't
> know how to configure it. I pulled one simple class definition out of
> my single source file and created a new .py file with just that in
> there. But now I'm stalled...
> 
> What is the equivalent of an 'include' statement. I assume there's
> something I put into one .py file to say I'm using stuff in another
> local .py file.   I tried using "import" but it doesn't seem to work -
> ie code doesn't know about the class in the other file.
> 
> Also, how about global vars that are needed across multiple .py files?
> Where do I declare them to be understood in all the files that use
> that global.
> 
> I suspect there is something I do in __init__.py - perhaps the
> equivalent of 'include' statements in there with all my globals
> stuffed in there too???   I'm lost here, but will continue to play
> with it.  Any hints appreciated.  Surely all python developers don't
> cram everything into one huge file (I hope).
> 
> Ross.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From basti.wiesner at gmx.net  Sun May 25 13:48:13 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 19:48:13 +0200
Subject: Pinging a machine from python
References: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>
Message-ID: <g1c8pv$hob$02$1@news.t-online.com>

[ Prasanth <prasanths89 at gmail.com> ]

> I tried pinging a machine from python using socket programming but
> could not do it. Is there any module which we can use to ping the
> machine < like net::ping in perl> or can you give me simple program.
At least on linux pinging requires raw sockets since there is no syscall for
sending ICMP packages.  Raw sockets in turn require special privileges. 
Therefore its best to use the os command _ping_, this limits the use of
priviledges to the required part and you don't have to deal with
priviledges (ping has suid bit set).

net::ping will most likely do the same.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From stevegill7 at gmail.com  Mon May 12 15:54:43 2008
From: stevegill7 at gmail.com (Jetus)
Date: Mon, 12 May 2008 12:54:43 -0700 (PDT)
Subject: downloading a link with javascript in it..
Message-ID: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>

I am able to download this page (enclosed code), but I then want to
download a pdf file that I can view in a regular browser by clicking
on the "view" link. I don't know how to automate this next part of my
script. It seems like it uses Javascript.
The line in the page source says
href="javascript:openimagewin('JCCOGetImage.jsp?
refnum=DN2007036179');" tabindex=-1>

So, in summary, when I download this page, for each record, I would
like to initiate the "view" link.
Can anyone point me in the right direction?

When the "view" link is clicked on in IE or Firefox, it returns a pdf
file, so I should be able to download it with
urllib.urlretrieve('pdffile, 'c:\temp\pdffile')

Here is the following code I have been using
----------------------------------------------------------------
    import urllib, urllib2

    params = [
                ('booktype', 'L'),
                ('book', '930'),
                ('page', ''),
                ('hidPageName', 'S3Search'),
                ('DoItButton', 'Search'),]

    data = urllib.urlencode(params)

    f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
S3DataLKUP.jsp", data)

    s = f.read()
    f.close()
    open('jcolib.html','w').write(s)



From sjmachin at lexicon.net  Thu May  1 20:22:50 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 1 May 2008 17:22:50 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
Message-ID: <972fb319-07d3-4d2b-aa4c-dc8e40af9e7e@b5g2000pri.googlegroups.com>

On May 2, 9:44 am, NevilleDNZ <neville... at gmail.com> wrote:
> Below is a (flawed) one line RegEx that checks curly brackets (from
> awk/c/python input) are being matched.  Is there a one liner for doing
> this in python?
>
> ThanX
> N
>
> re_open_close="(((\{))[^{}]*((?(0)\})))+"
> re_open_close=re.compile(re_open_close)
> tests="""
>   { this is a test  BAD
>   { this is a test } OK
>   { this is a test } { this is a test } OK
>   { this is a test } { this { this is a test } is a test } OK
>   { this is a test  { this { this is a test } is a test } missing
> close BAD
> """.splitlines()[1:]
> for test in tests:
>   if bool(re_open_close.search(test)) == bool(re.search("OK",test)):
>     print "DETECTED:",test
>   else:
>     print "MISSED:",test
> [linux]$ python ./re_matching.py
> DETECTED:   { this is a test  BAD
> DETECTED:   { this is a test } OK
> DETECTED:   { this is a test } { this is a test } OK
> DETECTED:   { this is a test } { this { this is a test } is a test }
> OK
> MISSED:   { this is a test  { this { this is a test } is a test }
> missing close BAD

Regexes can't count.

To check for balanced braces, you need to write code e.g.

# untested
def balanced_braces(s):
   n = 0
   for c in s:
      if c == '{':
         n += 1
      elif c == '}':
         n -= 1
         if n < 0:
            return False
   return n == 0

HTH,
John


From notnorwegian at yahoo.se  Sun May 25 03:00:14 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 00:00:14 -0700 (PDT)
Subject: recursion with or without return?
Message-ID: <5fe0c5e3-8063-4e84-a40a-3d1938671a80@z72g2000hsb.googlegroups.com>

when using recursion should one use a return statement or not?

there is a difference obv since with a return statement it will
ultimately return a value if not recursing forever.

but is there a guideline for this or it just taste or is it
considering good style or pythonic to always have a returnvalue?


From hyperboreean at nerdshack.com  Wed May 21 04:48:06 2008
From: hyperboreean at nerdshack.com (hyperboreean)
Date: Wed, 21 May 2008 11:48:06 +0300
Subject: scalable xml 
Message-ID: <4833E1C6.3010201@nerdshack.com>

Hi, I am writing the application server for a three-tier architecture 
and sending the client's response in xml. My question is: is there a way 
to build the xml dom in a more scalable way and faster way than just 
creating every textNode and element for it? I have tons of data to 
transmit and it drives me crazy having to build that dom manually.

I am not sure if this is a stupid question as I don't know other 
alternatives ... maybe just provide a template xml which I can fill with 
data but that can introduce some pretty ugly bugs in the application.


Thanks.



From russblau at gmail.com  Fri May  9 06:39:03 2008
From: russblau at gmail.com (Russell Blau)
Date: Fri, 9 May 2008 03:39:03 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <1fb6dbee-c9d9-4dc3-bb92-b3f5c1080c6e@25g2000hsx.googlegroups.com>

On May 9, 6:25 am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
>
> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
>
> > On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > > and
> > > list2 = [0, 2, 4] # integer elements
>
> > > howto (I mean most simple recipe, of course) form list3 that contains
> > > elements from list1 with indexes from list2, i.e.
>
> > list3 = [list1[i] for i in list2]
>
> > --
> > Paul Hankin

Why don't you try Paul's suggestion under Python 2.3 and see what
happens?


From inhahe at gmail.com  Wed May 21 11:15:45 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 11:15:45 -0400
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1%WYj.78116$%15.75349@bignews7.bellsouth.net>

i don't see anybody mentioning huffman encoding.  i think it just works per 
byte, so it's not as tight as gzip or whatever.  but it sounds like it would 
be easy to implement and wouldn't require any corpus-wide compression 
information. except a character frequency count if you wanted to be optimal.

<i don't know anything about compression>

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xy7658k8o.fsf_-_ at ruckus.brouhaha.com...
>I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
>
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
>
> Thanks. 




From vdv100 at gmail.com  Sun May  4 13:57:28 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 18:57:28 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
Message-ID: <eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>

Hi,

2008/5/4 David <wizzardx at gmail.com>:

> On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> > I can grab the image,  I need a way of grab the region size with the
> mouse,
> > a easy way of the user select a region of the image to analyze,
> something
> > like the  "Rectangle selection tool" of gimp.
> >
>
> I assume what you want to do is allow the user to drag the mouse
> across your desktop, and your program, running in the background,
> picks this up? As opposed to the user making a rectangular selection
> entirely within your app.


What I want is display a window with a image, the user select a region of
the image, and the region value is passed to my program, my program slice
the image region, and analyze it.

I think the Xlib libraries can help in my task, thanks for the help :)

Cheers,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org


>
> I think the simplest way to do this is to capture the entire screen,
> then show it as an image on a window covering the entire screen (eg:
> fullscreen mode, or a regular window without decorations).  Then
> listen for mouse events. There should be a way to show the 'rectangle
> elastic band' at the same time. Otherwise just draw a rectangle
> between where the user first clicked and where the mouse is now (until
> they release the mouse button).
>
> Another way would be to listen to all events sent through X, and act
> based on the mouse events. VNC does something similar.
>
> A good starting point would be the Python xlib libraries:
>
> http://python-xlib.sourceforge.net/
>
> David.
>
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From gnewsg at gmail.com  Fri May 16 12:49:49 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 16 May 2008 09:49:49 -0700 (PDT)
Subject: ANN: Python FTP Server library (pyftpdlib) 0.4.0 released
Message-ID: <bdda2729-3477-4a3a-b6b5-65e3b33f4b44@d1g2000hsg.googlegroups.com>

Hi,
I'm pleased to announce release 0.4.0 of Python FTP Server library
(pyftpdlib).
http://code.google.com/p/pyftpdlib/

=== About ===

Python FTP server library provides an high-level portable interface to
easily write asynchronous FTP servers with Python. Based on asyncore
framework pyftpdlib is currently the most complete RFC-959 FTP server
implementation available for Python programming language.


=== Major changes ===

This new version, aside from fixing some bugs, includes two new
features:

- IPv6 support (as described in RFC-2428).
- The possibility to assume the id of real users when using system
dependent authorizers.

A complete list of changes including enhancements, bug fixes and
instructions for using the new functionalities is available here:
http://code.google.com/p/pyftpdlib/wiki/ReleaseNotes04


=== More links: ===

* Source tarball: http://pyftpdlib.googlecode.com/files/pyftpdlib-0.4.0.tar.gz
* Online docs: http://code.google.com/p/pyftpdlib/wiki/Tutorial
* FAQs: http://code.google.com/p/pyftpdlib/wiki/FAQ
* RFCs compliance paper: http://code.google.com/p/pyftpdlib/wiki/RFCsCompliance
* Issue tracker: http://code.google.com/p/pyftpdlib/issues/list


Thanks,

-- Giampaolo Rodola' < g.rodola [at] gmail [dot] com >


From gherron at islandtraining.com  Tue May 20 11:59:55 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 20 May 2008 08:59:55 -0700
Subject: Help with character encodings
In-Reply-To: <4832EE29.5020700@islandtraining.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
	<4832EE29.5020700@islandtraining.com>
Message-ID: <4832F57B.2040405@islandtraining.com>

Gary Herron wrote:
> A_H wrote:
>> Help!
>>
>> I've scraped a PDF file for text and all the minus signs come back as
>> u'\xad'.
>>
>> Is there any easy way I can change them all to plain old ASCII '-' ???
>>
>> str.replace complained about a missing codec.
>>
>>
>>
>> Hints?
>>   
>
> Encoding it into a 'latin1' encoded string seems to work:
>
>  >>> print u'\xad'.encode('latin1')
>  -

That might be what you want, but really, it was not a very well thought 
answer.  Here's a better answer:



Using the unicodedata module, i see that the character you have  u'\xad' is

    SOFT HYPHEN (codepoint 173=0xad)


If you want to replace that with the more familiar HYPHEN-MINUS 
(codepoint 45) you can use the string replace, but stick will all 
unicode values so you don't provoke a conversion to an ascii encoded string

    >>> print u'ABC\xadDEF'.replace(u'\xad','-')
    ABC-DEF

But does this really solve your problem?   If there is the possibility 
for other unicode characters in your data, this is heading down the 
wrong track, and the question (which I can't answer) becomes: What are 
you going to do with the string?

If you are going to display it via a GUI that understands UTF-8, then 
encode the string as utf8 and display it -- no need to convert the 
hyphens.   

If you are trying to display it somewhere that is not unicode (or UTF-8) 
aware, then you'll have to convert it.  In that case, encoding it as 
latin1 is probably a good choice, but beware:  That does not convert the 
u'\xad' to an chr(45) (the usual HYPHEN-MINUS),  but instead to chr(173) 
which (on latin1 aware applications) will display as the usual hyphen.  
In any case, it won't be ascii (in the strict sense that ascii is chr(0) 
through chr(127)).  If you *really* *really* wanted straight strict 
ascii, replace chr(173) with chr(45).

Gary Herron






From deets at nospam.web.de  Fri May 30 12:20:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 18:20:25 +0200
Subject: Generating event from event
In-Reply-To: <d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
Message-ID: <6aanqgF36mnldU1@mid.uni-berlin.de>

Gandalf schrieb:
> On May 30, 3:43 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>> Gandalf wrote:
>>> I have script which being triggered by pressing CTRL+Right mouse click
>>> from any place in my O.P , Now I need to generate automatically event
>>> like copy my selected item or double clicking the right mouse cursor
>>> without user interfering.
>>> how can i implement this width python?
>>> thanks!
>> You didn't tell us enough to answer your question.  What GUI are you
>> using?  Nearly every one of them that I'm aware of allow you to register
>> handlers for such events.
>>
>> -Larry
> windows xp

Oh please. You have been around here & asking enough questions to 
finally notice that more information is needed - actually, you have been 
providing this at other times. What GUI-Toolkit are you using, on which OS?

Yes, I now *know* that it is WX - because I searched the archives. But 
that is not the thing here - provide enough information yourself.

Diez


From iainking at gmail.com  Thu May 15 04:19:45 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 15 May 2008 01:19:45 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<dullrich-A8B0BE.15375014052008@text.giganews.com>
Message-ID: <1d3dfd98-ecc3-4092-9c03-346ddf118375@i76g2000hsf.googlegroups.com>

On May 14, 9:37 pm, "David C. Ullrich" <dullr... at sprynet.com> wrote:
> In article
> <a14c2400-e88b-4d90-80bb-a5fe27fed... at m44g2000hsc.googlegroups.com>,
>  Iain King <iaink... at gmail.com> wrote:
>
> > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > up a file selector.  This all works fine, but the first thing the user
> > has to do when they open the dialog is select a file, so I would like
> > the dialog to automatically call the onBrowse function as soon as the
> > dialog opens.  However, I don't know how to do this.
>
> > dlg.ShowModal()
> > onBrowse()
>
> > obviously doesn't work, and neither does the reverse.  I was hoping
> > that the dialog would throw some kind of "I have been shown" event,
> > but it doesn't (as far as I can tell).  How do I make the dialog do
> > something as soon as it's been shown?
>
> It's too bad that you found an answer. You _shouldn't_ have your
> dialog pop up a file-selection box as soon as it's shown! That's
> not the way dialogs usually work, so you're going to confuse
> people.
>
> Instead, first pop up the file-selection box, and then pop up
> the dialog (without the Browse button) to do whatever else it
> does after you've got the filename.
>

That's actually what happens - the dialog throws EVT_INIT_DIALOG
before it displays itself.  Not that I really agree with you.  I don't
think that a "do such-and-such dialog" appearing with a "Select file
for such-and-such" file selector on top of it, the file selector being
in focus, is confusing for the user.  Actually, I think it'd be
friendlier - the user can see where the data from the file is going,
so has an immediate reminder of what the (generic) file selector is
for.


From cwitts at gmail.com  Mon May 26 09:20:37 2008
From: cwitts at gmail.com (Chris)
Date: Mon, 26 May 2008 06:20:37 -0700 (PDT)
Subject: Signal handler doesn`t handle any signals while main thread is 
	blocked
References: <mailman.1610.1211804786.12834.python-list@python.org>
Message-ID: <d061d1a6-d9fa-4bb2-b8fd-3381d70ae627@25g2000hsx.googlegroups.com>

On May 26, 2:26?pm, "Grzegorz Kokosi?ski" <g.kokosin... at gmail.com>
wrote:
> Hi!
> I waste a lot of my time figuring why this snip of code doesn`t work.
> And still without any solution ;/
> Does anybody know why this handler cannot handle SIGINT signal? What
> did I wrong?
>
> Thanks in advance.
>
> #
> # CODE
> #
> import signal
> from threading import *
>
> def siginthandler(signum, frame):
> ? ? ?global work,cv
> ? ? ?print 'terminating...'
> ? ? ?cv.acquire()
> ? ? ?work = 0
> ? ? ?cv.notifyAll ()
> ? ? ?cv.release()
>
> work = 1
> signal.signal (signal.SIGINT, siginthandler)
>
> print 'wait for SIGINT signal'
> cv = Condition ()
> cv.acquire()
> while work:
> ? ? print 'waiting...'
> ? ? cv.wait()
> print 'woke up'
> cv.release()
>
> print 'terminated'

change cv.wait() to cv.wait(delay) and it will capture the terminate
request and wrap the cv.wait(delay) in a try/except IOError: break
block.


From saluk64007 at gmail.com  Sat May 24 03:49:53 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 24 May 2008 00:49:53 -0700
Subject: Python is slow
In-Reply-To: <87lk20telh.fsf@physik.rwth-aachen.de>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
	<87lk20telh.fsf@physik.rwth-aachen.de>
Message-ID: <c3f69bf60805240049o6ead7b64k5464a45c2f0caf8b@mail.gmail.com>

Judging python's speed by how fast websites go is not going to work very
well.  There are many things that can bog down the "speed" of loading a web
site, especially if you are judging speed by how long a page takes to load.
torontolife.com is loading extremely slow for me also.  So is wikipedia.
Much slower than say, code.google.com, or the trac site I have running on my
remote server.  I have seen just as many slow php sites as slow python
sites.

Also, the hosting solution plays a huge part in how fast a site responds.
If someone is using python through cgi, that IS going to be very slow,
whereas other solutions are faster.  PHP sites are not hosted on cgi, while
many python solutions sadly still are.

So yeah, finding specific sites that are slow and written in python and
claiming that it's slow is trolling.  Youtube is slow these days, but a year
or more ago it was very fast.  They just haven't been able to keep up with
demand.  (Even movies play slow, constantly buffering, and the movies don't
even play from python).

Of all domains, the web domain needs speed (from logic code, where python
resides) the LEAST, because so much of the time is spent buffering packets,
alternating between threads or processes, or accessing the database or
files.  All of these operations contribute the most to slow web pages.  And
before you complain that python has to "buffer packets", or "access the
database", all of these operations are done at the C level (or lower).

Python is slow, but php is slower.  And python's speed is always improving.
On the other hand, it is much easier to find good php hosting services, due
to it's wide availability - better hosting = faster sites.
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From george.sakkis at gmail.com  Sat May  3 20:57:09 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 17:57:09 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com> <m2r6cjksw6.fsf@googlemail.com> 
	<fvikgm$gig$1@news.xmission.com>
Message-ID: <2c82d29f-271d-4f0f-bbf5-1e95f00b1677@y21g2000hsf.googlegroups.com>

On May 3, 5:12?pm, dave <squareswallo... at yahoo.com> wrote:
> thanks Duncan and Arnaud.
>
> I'm learning Python from the "How to Think Like a Python Programmer"
> book by Allen Downey. ?My first try used the "inv[val] = [key]" and
> then the next problem was to incorporate the "D.setdefault(...)" method.
>
> Thank you for your help. ?I'm always amazed how kind people are in this group.
>
> On 2008-05-03 14:57:29 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>
> > dave <squareswallo... at y1a2hoo3.com> writes:
>
> >> Hello,
>
> >> here is a piece of code I wrote to check the frequency of values and
> >> switch them around to keys in a new dictionary. ?Just to measure how
> >> many times a certain key occurs:
>
> >> def invert(d):
> >> ? ? ? ?inv = {}
> >> ? ? ? ?for key in d:
> >> ? ? ? ? ? ? ? ?val = d[key]
> >> ? ? ? ? ? ? ? ?if val not in inv:
> >> ? ? ? ? ? ? ? ? ? ? ? ?inv.setdefault(val, [key])
> > You can simply write:
> > ? ? ? ? ? ? ? ? ? ? ? ? inv[val] = [key]
> >> ? ? ? ? ? ? ? ?else:
> >> ? ? ? ? ? ? ? ? ? ? ? ?inv[val].append(key)
> >> ? ? ? ?return inv
>
> >> Using the methods above (I'm just a beginner) could I have written it
> >> more concisely? ?Any criticism/critique in the code would be greatly
> >> appreciated.
>
> > Apart from the unnecessary use of setdefault, it looks good to me.
>
> > * You could change if 'val not in inv:' to 'if val in inv:' (and swap
> > ? the if and else clauses of course) in order to have a positive
> > ? condition rather than a negative one
>
> > * If you want to use setdefault, you can replace the if .. else
> > ? construct by:
>
> > ? ? ? ? ? ? ? ?inv.setdefault(val, []).append(key)
>
> > * You can also iterate over keys and values using the items() or
> > ? iteritems() method of dictionaries:
>
> > def invert(d):
> > ? ? inv = {}
> > ? ? for key, val in d.iteritems():
> > ? ? ? ? inv.setdefault(val, []).append(key)
> > ? ? return inv
>
>

In Python 2.5 and later you may use the defaultdict class which is
faster and slightly more elegant in such cases:

from collections import defaultdict

def invert(d):
    inv = defaultdict(list)
    for key, val in d.iteritems():
        inv[val].append(key)
    return inv

George


From lists at cheimes.de  Thu May  1 17:57:08 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 23:57:08 +0200
Subject: dropping win98 support?
In-Reply-To: <372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92>	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
Message-ID: <481A3CB4.90408@cheimes.de>

illume schrieb:
> Ah, why is that?
> 
> There's still at least 1.1% of people using win98, if you believe this
> source of stats:
> http://www.w3schools.com/browsers/browsers_os.asp
> 
> I just noticed that win9x winme and win nt are all being dropped from
> python.
> 
> I know they are old and crufty, but there's still heaps of people
> using them.

The Python core developer team has limited resources. We don't want to
waste our energy with supporting ancient operation systems. Microsoft
has dropped the support for the 9x and NT series several years ago.
Dropping the support as well makes future development and new features
much easier for us.

Python can finally depend on the wide api functions and sane unicode
support.

> Someone pointed me to the pep, where the un-support seems planned:
> http://www.python.org/dev/peps/pep-0011/
> 
> 
> Seems like a lot of people using it, so it's still worthwhile making
> 2.6 work with win98.

People can still use Python 2.5. Users of deprecated and unsupported
OSes can't except new versions of software to run on their boxes.

Christian


From giles_brown at hotmail.com  Mon May 19 07:07:15 2008
From: giles_brown at hotmail.com (Giles Brown)
Date: Mon, 19 May 2008 04:07:15 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <6ddae8ef-5886-4b37-aafb-50c8dbdb8a81@t54g2000hsg.googlegroups.com>

On 19 May, 06:11, sapsi <saptarshi.g... at gmail.com> wrote:
> Hello,
> I am using HadoopStreaming using a BinaryInputStream. What this
> basically does is send a stream of bytes (  the java type is : private
> byte[] bytes) to my python program.
>
> I have done a test like this,
> while 1:
>         x=sys.stdin.read(100)
>         if x:
>                 print x
>         else:
>                 break
>
> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
>
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
>
> However i get a 1 before all and a 4 just after \n and before the 6.
>
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?
>
> Thanks
> Sapsi

In the past I've sent binary data to a java applet reading
DataInputStream using xdrlib from the standard library.  I'd expect
that it would work in the reverse direction so I suggest you have a
look at that.

Giles


From renesd at gmail.com  Thu May  1 02:10:18 2008
From: renesd at gmail.com (illume)
Date: Wed, 30 Apr 2008 23:10:18 -0700 (PDT)
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
Message-ID: <bec98d89-18d2-4407-b550-35e3ec8c1853@h1g2000prh.googlegroups.com>

hi again,

I should have said, the msvcr90.dll does not work on win9x machines -
as well as not being supported by ms.


cu,



On May 1, 4:02 pm, illume <ren... at gmail.com> wrote:
> Hi,
>
> after a little research it appears that win9x is not supported by the
> msvcr90.dll run time.
>
> Can you confirm this Lenard?
>
> Has anyone tested the new python binaries that link to msvcr90.dll on
> win9x machines?
>
> cheers,
>
> On May 1, 3:05 pm, "L. Lindstrom" <spam-t... at telus.net> wrote:
>
> > L. Lindstrom wrote:
> > > Christian Heimes wrote:
> > >> L. Lindstrom schrieb:
> > [snip]
> > >>> [B]esides heap management and FILE pointers, is there any reason SDL, or
> > >>> any C dependency, needs to link to the same C run-time as Python? If I
> > >>> ensure SDL frees memory it allocates and does not directly access a file
> > >>> opened by Python can I just use another C run-time such as msvcrt?
>
> > >> Your analysis of the problem and the implication of mixing CRTs is
> > >> correct. However ...
>
> > >> It should be trivial to modify the build systemof SDL so that the
> > >> manifest is integrated into the DLLs. Everything else is a hack. It
> > >> *should* work and in reality it *does* work for most cases. But someday
> > >> you'll hit a solid wall and get strange and hard to debug segfaults.
>
> > [snip]
> > > Linking to msvcr90.dll is possible with MinGW. The problem is with the
> > > configure scripts. So I can run configure against msvcrt.dll, then
> > > switch to mscvr90.dll for make. If this works I will make SDL and a test
> > > program available on-line so someone can find the appropriate manifests.
>
> > Here is my attempt to link SDL and a test program with msvcr90.dll. It
> > can be found athttp://www3.telus.net/len_l/pygame. The md5sum is:
>
> > f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip
>
> > Both lack a manifest. The test program and SDL work when a surrogate
> > run-time is provided, a renamed msvcr71.dll . So if someone can show me
> > the necessary manifest to make SDL use the C run-time installed by the
> > Python 2.6 installer I would appreciate it. SDL is built with MinGW so I
> > doubt I can distribute the run-time with it.
>
> > --
> > Lenard Lindstrom
> > "%s@%s.%s" % ('len-l', 'telus', 'net')



From wxPythoner at gmail.com  Tue May 13 06:10:13 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 03:10:13 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
Message-ID: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>

We have to avoid the use of the 'is' identity operator with basic,
immutable values such as numbers and strings. The result is
unpredictable because of the way Python handles these objects
internally.

How is with this issue in Python 3.0? Is it fixed? Does Python handle
this things properly now?


From sturlamolden at yahoo.no  Sat May 17 21:44:56 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sat, 17 May 2008 18:44:56 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <75c44374-fd3a-458f-89ab-e78bdbad5d7c@k13g2000hse.googlegroups.com>

On May 18, 12:32 am, Vicent Giner <vgi... at gmail.com> wrote:

> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

First of all: whatever you do, use NumPy for all numerical work (and
possibly Scipy). Remember that Python with NumPy tend to be faster
than Matlab. Anything that applies to Matlab regarding vectorization
for speed also applies to NumPy.

If your program runs too slowly, try to use the psyco jit compiler
first. If that doesn't help, try one of the following:

- use Cython or Pyrex and compile your (modified) Python code
- inline C++ using scipy.weave
- write a function in C and call it using ctypes
- write a function in Fortran and make it callable from Python using
f2py

Usually, only small bottlenecks matter when it comes to overall
performance. It is also notoriously difficult to guess where they are.
Therefore: write everything in Python first, then profile your code to
identify bottlenecks. Only important bottlenecks need to be translated
to Pyrex, C or Fortran.

http://www.scipy.org/PerformancePython


> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context.

Google NumPy, SciPy, Matplolib and Sage.

NASA uses Python to process image data from the Hubble telescope.





> Thank you in advance.



From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 12:42:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 18:42:32 +0200
Subject: class-oriented rather than object-oriented?
In-Reply-To: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <483ae877$0$2332$426a74cc@news.free.fr>

notnorwegian at yahoo.se a ?crit :
> i have some confusion over this.
> 
> sure a class is basically a classification, like for example an animal
> or flower. and an object/instance of that class is then for example a
> cat.
> 
> an object is an instance of a class.

Depends on the language.

> that i know, i also know how to
> program with classes etc.
> 
> i am just confused about the term object-oriented.
> 
> wouldnt class-oriented be more fitting? at least for java since what
> you do is divide everything into classes.

InMyArms(tm) !-)

> in python i dont or at leats not as much.

Fact is that Python is more concerned about objects and less about 
classes. While you do have the concept of a class in Python, it's in 
some points closer to javascript's prototypes. Amongst other things, the 
object/class relationship is not necessarily static - you can 
dynamically rebind an object to another class (whether it's a good idea 
is another question), dynamicallt add/remove/replace attributes 
(including methods) on a per-instance or per-class basis, etc.

> 
> does object-oriented refer to that everything(strings, ints etc) are
> all objects?

The only commonly accepted definitions I know wrt/ OO are :

1/ an OO program is composed of objects interacting thru messages
2/ an object is defined by an identity, a state and a behaviour

So to answer your question:

Not necessarily, but having non-object "things" in an OO program somehow 
contradicts definition #1 IMHO.

BTW, you'll notice that there's nowhere mention of "classes" here...

> so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

... nor of "primitive types" !-)

> are python functions objects?

Yes. As well as classes, modules, and even the function's code. From 
this POV, Python is 100% object. wrt/ to the "message passing" part, 
it's probably a bit more debatable, specially when compared to Smalltalk 
where messages are the only control structure.

> can a functional language be object-oriented or an objectoriented
> language be functional?

Well... Depends on the definitions of "object-oriented" and 
"functional". There are indeed some languages that try to support both 
approach, coming either from the OO side (Python, Ruby, Javascript...) 
or from the functional side (OCaml, Common Lisp, Scheme, ...).

Now none of these languages are "pure" functional languages. The point 
is that OOP and FP are two different and more or less incompatible 
approach toward state management. OOP try to encapsulate state into 
objects, while FP try to simply get rid of any shared state.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

If your classes are objects, then what's the difference ?-) And if they 
are not, how are you going to pass messages between them ?

But the fact is that the concept of "class" is by no mean central, nor 
even necessary, to OO. You might want to have a look at languages like 
Self, Io and Javascript, which are prototype-based instead of class-based.


From vivainio at gmail.com  Sat May 24 11:56:21 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sat, 24 May 2008 15:56:21 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <87prrbk85x.fsf@gmail.com>

Fuzzyman <fuzzyman at gmail.com> writes:


> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke
> their spreadsheet code by changing your API.

And the customer point of view is quite reasonable - they have a job
to do, and a limited timeframe; sometimes accessing privates directly
is much better than waiting for updates from vendor. Bad designs (as
far as choosing publics goes) happen.

Even if their softare breaks on upgrade, you can quite clearly point
out that they used an internal api - and they will keep on using the
old version until they solve the problem. Everybody wins.

Perhaps a lint-like validation tool would be optimal for this
problem...



From myshelter at gmail.com  Sun May  4 06:22:35 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 03:22:35 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
Message-ID: <ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>

I had previously ran the import line. I prepended it to the example
code I'm trying to run every time but it did not help, still nothing
happens. With or without var before 'root'. I'm pasting the code in
IDLE and using Windows XP as written in the first post.

On May 4, 11:04 am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> Try adding:
>
> from Tkinter import *
>
> at the beginning, and you don't need "var" in front of root=Tk(), just
> "root = Tk()"   (<-without the quotes of course)
> What OS are you on?  Are you running "python testapp.py" or similar to
> make it run?
>
> -Chuckk
>
>
>
> On Sun, May 4, 2008 at 12:39 PM, Protected <protec... at myshelter.net> wrote:
> > Good thinking. It was indented with spaces, so I replaced them with tabs.
> > Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
> > code in two parts (with the second one beginning in that line) and run them
> > separately, I get no errors, but still nothing happens.
>
> > class Application(Frame):
> >     def say_hi(self):
> >         print "hi there, everyone!"
>
> >     def createWidgets(self):
> >         self.QUIT = Button(self)
> >         self.QUIT["text"] = "QUIT"
> >          self.QUIT["fg"]   = "red"
> >         self.QUIT["command"] =  self.quit
>
> >         self.QUIT.pack({"side": "left"})
>
> >         self.hi_there = Button(self)
> >          self.hi_there["text"] = "Hello",
> >         self.hi_there["command"] = self.say_hi
>
> >         self.hi_there.pack({"side": "left"})
>
> >     def __init__(self, master=None):
> >          Frame.__init__(self, master)
> >         self.pack()
> >         self.createWidgets()
>
> > var root = Tk()
> > app = Application(master=root)
> > app.mainloop()
> > root.destroy()
>
> > On Sun, May 4, 2008 at 12:33 PM, Q4 <q... at invalid.com> wrote:
>
> > > On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshel... at gmail.com>
> > > wrote:
>
> > > > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > > > some Tkinter examples, including the one from the library reference,
> > > > but they don't seem to do anything! Shouldn't there be, like, a
> > > > dialog?
>
> > > > I'm running Windows XP and using IDLE. You can assume my version of
> > > > Python is the latest.
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > If you just copy the code from the python doc the indentation might be
> > > broken.
> > > Send the code and I'll take a look at it.
>
> > > Do you get any errors?
>
> > > --
> > > My website:
> > >  http://www.riddergarn.dk/koder/
>
> > --
> >  http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com



From lew at lewscanon.com  Thu May  8 06:53:36 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 08 May 2008 06:53:36 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <rem-2008may08-005@yahoo.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <oaGdnQBiu-stRr_VnZ2dnUVZ_qrinZ2d@comcast.com>

Robert Maas, http://tinyurl.com/uh3t wrote:
> I have my own gripe against regular expressions ("regex" for short).
> I hate the extremely terse format, with horrible concoctions of
> escape and anti-escape magic characters, to fit within Unix's
> 255-character limit on command lines, compared to a nicely
> s-expression nested notation that would be possible if regex hadn't
> entrenched itself so solidly.

This is all very interesting, but not Java.

-- 
Lew


From martin at v.loewis.de  Fri May  9 19:37:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 01:37:07 +0200
Subject: PyXml
In-Reply-To: <mailman.890.1210367123.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
Message-ID: <4824E023.1060803@v.loewis.de>

> What's the story with PyXml?  Is it stable/complete or has effort moved
> elsewhere?

Large parts of PyXML are now part of the standard library. When I
stepped back as a maintainer, nobody volunteered to take over.

> Can anyone recommend a Python validating parser that validates vs Xml
> Schema?

The libxml bindings for Python can do that.

Regards,
Martin


From duncan.booth at invalid.invalid  Thu May  8 04:11:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 08:11:19 GMT
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <Xns9A985D454FA54duncanbooth@127.0.0.1>

andrej.panjkov at climatechange.qld.gov.au wrote:

> Here is a simple lambda that implements an exclusive or:
> 
>>>> def XOR(x,y) :
>>>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) 
)
> 
> (Because of the resemblance to C macros, I have been cautious and
> written the lambda with lots of parentheses.)
> 
> To use this in later code, we define instances of the lambda with
> specific function arguments.
> 
>>>> topping = XOR( cream, icecream)
>>>> sauce = XOR( tomato, BBQ )
> 
> 
> We now have two ??functions??, topping() and sauce() which we can use
> later to test flags.
> 
>>>> cream = True
>>>> icecream = False
>>>> print topping()
> True
> 

No, no, no, no, no!

You have got it entirely wrong here. Your XOR function simply returns a 
function which gives you the result of xoring the parameters AT THE TIME 
WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set 
cream and icecream (otherwise the call to XOR would have thrown an 
exception) and at leas one was true. Try setting them both False at the 
beginning:

>>> cream = False
>>> icecream = False
>>> topping = XOR( cream, icecream)
>>> cream = True
>>> icecream = False
>>> print topping()
False

Using a lambda was a completely pointless exercise here, you could have 
just returned the result directly:

>>> def XOR(x,y):
	return x^y

>>> topping = XOR(cream, icecream)
>>> print topping
True

Same thing for your TFF function:

def TFF(x,y,z) :
  return x and not y and not z

AddOnly = TFF( options.AddAction, options.ReplaceAction,
options.DeleteAction )
DeleteOnly = TFF( options.DeleteAction, options.AddAction,
options.ReplaceAction )
ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
options.DeleteAction )

if not (DeleteOnly or AddOnly or ReplaceOnly):
  print "Error:  Exactly one of  [ --add | --replace | --delete ]
allowed. "
  parser.print_help()
  exit

which boils down to:

if (options.AddAction + options.ReplaceAction +
        options.DeleteAction) != 1:
    print "Error: ..."


From malaclypse2 at gmail.com  Fri May 23 22:45:11 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 23 May 2008 22:45:11 -0400
Subject: Storing objects in relational database
In-Reply-To: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
Message-ID: <16651e80805231945o4307c860i97bdbd30a63ae20e@mail.gmail.com>

On Fri, May 23, 2008 at 5:07 PM, nayden <nayden at gmail.com> wrote:
> The reason I am writing here is that I can't seem to figure out how to
> save/restore python objects into a relational database.

Here's a basic version using the sqlite bindings included with Python 2.5:

import sqlite3, pickle

thing = {'date': '2008-05-21',
         'event': 'Something happened this day'}

conn = sqlite3.connect(':memory:')
c = conn.cursor()
c.execute('''create table stuff (idx integer, data text)''')
c.execute('''insert into stuff values (?,?)''', (1, pickle.dumps(thing)))
c.execute('''select data from stuff where idx=1''')
row = c.fetchone()
# sqlite3 stores text fields as unicode, so we need to encode to ascii
# before we unpickle
pickle_str = row[0].encode('ascii')
thing2 = pickle.loads(pickle_str)

print thing
print thing2

Maybe that will set you on the right track.

-- 
Jerry


From ian.g.kelly at gmail.com  Tue May  6 15:50:55 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 13:50:55 -0600
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <3fc761710805061250k5cc4de5al7157f9e888d938b5@mail.gmail.com>

On Tue, May 6, 2008 at 1:42 PM, Anton Slesarev <slesarev.anton at gmail.com> wrote:
>  Is it possible to increase file reading performance?

Dunno about that, but this part:

>  flines = (line for line in f if pat.search(line))
>  c=0
>  for x in flines:
>     c+=1
>  print c

could be rewritten as just:

print sum(1 for line in f if pat.search(line))


From deets at nospam.web.de  Tue May  6 11:56:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 17:56:34 +0200
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <68bdeeF2scu7cU1@mid.uni-berlin.de>

> Ah ha, thar's the disconnect.  Thanks for all the pointers, my def is
> now working.  Still don't understand the logic behind this design though.
> I mean why would any programming language have separate search or find
> functions, one for regex and and another for non-regex based pattern
> matching?
> 
> Aren't sed, awk, grep, and perl the reference implementations of search
> and replace?  They don't have non-regex functions, why does Python?
> Wouldn't it be a lot simpler to use a flag, like grep's '-f', to change
> the meaning of a search string to be literal?

And by this possibly destroying other modules code that rely on their
respective strings being that - and not patterns.
 
> My other gripe is with the kludgy object-oriented regex functions.
> Couldn't these be better implemented in-line?  Why should I, as a coder,
> have to 're.compile()' when all the reference languages do this at compile
> time, from a much more straightforward and easy to read in-line
> function...

You can do that already, no need to - the patterns are cached. Albeit the
cache might be limited in size. but code like

m = re.match(pattern, s)

is not considerably slower than

rex = re.compile(pattern)
m = rex.match(s)

Diez


From marlin_rowley at hotmail.com  Fri May 16 18:31:30 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 17:31:30 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>

Thank you!  That solved it!
 
-M



> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 17:25:00 -0500> > Marlin Rowley wrote:> > All:> > > > I'm getting different floating point values when I use numpy vs. unpack().> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > buffer = unpack("!f", byte)> > > > frgba[0] != buffer[0]> > > > why? This is forcing me use the unpack() function since it's giving me > > the correct values. What am I doing wrong?> > Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most > likely, you are on a little-endian platform. All of the dtypes in numpy default > to the native-endianness unless specified. If you want to read big-endian data > using numpy, do this:> > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > If you have any more problems with numpy, please join us on the numpy mailing > list. When reporting problems, please try to provide a small but complete > snippet of self-contained code, the output that you got, and explain the output > that you expected to get. Thank you.> > http://www.scipy.org/Mailing_Lists> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From kamhung.soh at gmail.com  Sun May 11 02:10:54 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 16:10:54 +1000
Subject: firefox add-on to grab python code handily?
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <op.uay7ggimev04yd@hungvista>

On Sat, 10 May 2008 17:58:12 +1000, CM <cmpython at gmail.com> wrote:

> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
>
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
>
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
>
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?
>
>

Not a Firefox add-on, but I found GnuWin32's "getclip" and "putclip" tools  
useful.  If you are familiar with shell tools, you can use "sed" to remove  
leading indentation marks such as "> " before you paste sample code into  
your IDE:

getclip | sed "s/> //" | putclip

See http://kamhungsoh.com/blog/2008/05/more-uses-of-getclip-putclip.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From wuwei23 at gmail.com  Wed May 21 01:52:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 20 May 2008 22:52:01 -0700 (PDT)
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
Message-ID: <86369376-183f-41ea-a2e3-423891856ce9@w4g2000prd.googlegroups.com>

On May 21, 10:59 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> I'd like to propose that debug-on-exception be made into a standard
> feature that is easy to enable, e.g. with a command line option
> or with a simple pdb call immediately after the import:

Forgive me if I've missed your point, but it seems you can already do
this:

	pdb.py can also be invoked as a script to debug other scripts.
	For example:

	python -m pdb myscript.py

	When invoked as a script, pdb will automatically enter post-mortem
	debugging if the program being debugged exits abnormally. After
	post-mortem debugging (or after normal exit of the program), pdb
	will restart the program. Automatic restarting preserves pdb's
	state (such as breakpoints) and in most cases is more useful than
	quitting the debugger upon program's exit. New in version 2.4:
	Restarting post-mortem behavior added.

http://docs.python.org/lib/module-pdb.html


From kuratkull at kuratkull.com  Mon May 19 10:29:53 2008
From: kuratkull at kuratkull.com (kuratkull at kuratkull.com)
Date: Mon, 19 May 2008 07:29:53 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
	<2196ab0c-93f4-4dba-807f-32f2a9391826@m36g2000hse.googlegroups.com>
Message-ID: <bc8bcbeb-c794-4c82-8529-07ce83662c32@a1g2000hsb.googlegroups.com>

On May 19, 4:01 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 19, 4:54 am, kuratk... at kuratkull.com wrote:
>
>
>
> > Hello,
>
> > ***************
> > import urllib2
> > import re
> > import string
> > import sys
>
> > url = "http://www.macgyver.com/"
> > request = urllib2.Request(url)
> > opener = urllib2.build_opener()
> > html = opener.open(request).read()
>
> > match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
>
> > out = match.findall(html)
>
> > print out
> > **************
This worked like a charm! :)
I used Python about a year ago and I have forgotten some of its
properties.

Thanks to both of you!
-kuratkull

>
> > I would like to print out string with formatting, but as I read, the
> > string is made into a raw string when using re.
> > How could I disable or bypass this?
>
> > I googled for an hour and couldn't find a solution.
>
> > Thank you in advance.
>
> Change your print statement to:
>
> print out[0]
>
> -- Paul



From larry.bates at websafe.com`  Fri May  2 15:25:43 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 14:25:43 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>

TkNeo wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>> TkNeo wrote:
>>> WHAT ?
>>> This is crazy
>> Crazy like a fox?
>>
>> a = [1, 2, 3]
>> try:
>>      a.index(99)
>> except:
>>      a.append(99)
>> finally:
>>      print a.index(99)
>>
>> MY question: which exception should I actually be catching there?
>> ** Posted fromhttp://www.teranews.com**
> 
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.

-1 doesn't make any sense.  How could you tell the difference between the value 
being there and actually being -1 and it not being there and Python returning 
-1?  Raising an IndexError is the proper behavior.  You should catch the 
IndexError if you are going to be indexing into an list with arbitrary indexes.

-Larry


From d.a.abernathy at gmail.com  Fri May 30 09:53:01 2008
From: d.a.abernathy at gmail.com (dj)
Date: Fri, 30 May 2008 06:53:01 -0700 (PDT)
Subject: Has a file been opened by another program ?
Message-ID: <beeafce7-897e-4fe0-b9e8-81ce21fac902@m73g2000hsh.googlegroups.com>

Hello All,

First, Is there a python library, method or module that will tell you
if a file has been opened by another program (i.e: Word, PowerPoint,
IE etc.), the methods I have found in the standard library will only
work with the python open method.

Second, I want to take the time to thank each and everyone of you for
your help. If you have not already guessed, I am a python novice ( I
know your surprised), and I am learning a lot and have discovered alot
about python from your answers. So, I just want to say....... THANK
YOU !!!!!


From gagsl-py2 at yahoo.com.ar  Fri May  2 21:52:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 22:52:21 -0300
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
Message-ID: <op.uaj15jxix6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 12:07:55 -0300, D'Arcy J.M. Cain <darcy at druid.net>  
escribi?:
> On Sat, 03 May 2008 00:43:02 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> Roy Smith <roy at panix.com> writes:

>> > Have you ever shipped software to a customer?
>>
>> Yes, and all parties have been quite happy with the results.
>
> When some of us talk about shipping software we aren't talking about a
> 20 line script delivered to our uncle's construction company office.  We
> are talking about millions of lines of code in thousands of programs and
> modules that has to run out of the box on whatever system the client
> happens to run on.
> [...]
> Simple for your 20 line single script.  Not so simple for my million
> line, integrated system that has to work everywhere.

In that case you have a setup script, I presume. You use distutils or a  
better alternative, I presume. You use the scripts= argument to setup, or  
the install_scripts distutils command, I presume. The first line on your  
scripts starts with #! and contains the word python somewhere, I presume.  
Then, distutils will adjust that shebang line using the same python  
executable that was used to run the installation.
It doesn't matter whether the line read #!/usr/bin/python, #!/usr/bin/env  
python, #~/bin/python2.3 or just #!python: whatever Python was used to  
install your program, that will be written as the first line on the  
script, and consequentely that will be used to execute the script in the  
future. So the admin (or whoever installs the system) only has to make  
sure to use the right Python version from the right directory. That's all.  
Plain easy, isn't it?

I can't believe some angry responses in this thread - it's just a  
technical question, not about which is the best team in the [preferred  
sports here] National Championship...

-- 
Gabriel Genellina



From yguan08 at gmail.com  Tue May 13 18:14:38 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 15:14:38 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
Message-ID: <4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>

On May 13, 4:38?pm, John Machin <sjmac... at lexicon.net> wrote:
> ygua... at gmail.com wrote:
> > I have trouble of obtaining the file size of a file because the
> > fullpath exceeds 255 characters. I get this message with
> > os.path.getsize(fullpath).
>
> > fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> > \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> > \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> > \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> > Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> > fsize = os.path.getsize(fullpath)
>
> > WindowsError: [Error 206] The filename or extension is too long:
>
> > The same thing with os.stat(fullpath).
>
> > I tried using the relative path, but it does not work with the message
> > fname not found.
>
> > dir = os.path.dirname(fullpath)
> > fname = os.path.basename(fullpath)
> > os.chdir(dir)
>
> I suspect that the cause of the problem here is that while *x OSes have
> just one current working directory, Windows has one cwd per drive.
>
> > filesize = os.path.getsize(fname)
>
> > Is there a walk around of this?
>
> At the DOS command level, you can do
> ? ? ?subst x: very\long\path
> and then refer to
> ? ? ?x:filestem.ext
> where x is any unused drive letter.
>
> This seems to work:
>
> ?>>> import os
> ?>>> os.system('subst x: c:\\junk')
> 0
> ?>>> f = open('x:foo.py')
> ?>>> f.read()
> "print 'hello'\n"
> ?>>>
>
> HTH,
> John- Hide quoted text -
>
> - Show quoted text -

Good idea. But subst does not see to work with path that has spaces.
It gives "Incorrect number of parameters"



From bruno.desthuilliers at gmail.com  Wed May 14 17:08:03 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:08:03 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com>
Message-ID: <2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com>

On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
> On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > single language compiler instead of three dimensional compiler that
> > GCC is (cross platform, cross target platform, cross language).
>
> And to add, I also need to mention that Python doesn't need to be
> compiled at all,

No language needs compilation - it's an implementation problem, not a
language problem. Now all the Python's implementations I know do use
compilation (to byte-code).

> its py and pyo file is architecture independent.

True, but this is not strictly related to being compiled or not.




From george.sakkis at gmail.com  Mon May 12 23:29:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 20:29:46 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
Message-ID: <d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>

On May 12, 11:02?pm, Jimmy <mcknight0... at gmail.com> wrote:
> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
> > > Well, i know it may be a little non-python thing, however, I can think
> > > ?of no place better to post this question :)
>
> > > ?can anyone tell me, in python, how to obtain some information of a
> > > ?running program?
> > > ?paticularly, if i am playing some music in audacious or other media
> > > ?player, how can i get the the name and some other info of current
> > > ?playing song? It seems that audicious doesn't output on run-time
> > > ?--
> > > ?http://mail.python.org/mailman/listinfo/python-list
>
> > In most cases, you'll probably need some sort of API, either in the
> > program itself or through some sort of plugin, that lets external
> > programs query it. ?For instance, there are some plugins to WinAmp
> > that allow external programs (like Last.FM or Mog-O-Matic) to see what
> > track is currently playing. ?You may also be able to do something like
> > get the window title (again, WinAmp's title bar usually includes the
> > artist and title) and parse it out. ?I don't really know that there's
> > anything specific to Python for accessing these though, and it may
> > vary depending on media player.
>
> > Just my two cents...
>
> > -dan
>
> thanks!
>
> In linux, I am always obfuscated by sort of APIs. Like how to get
> title information of a running program?
> where am I supposed to find these APIs

I think you're a little confused about how computers work in general
and what a program can do, and you expect there is some general
superprogram able to decipher what an arbitrary other running program
does. The sentence "how to get title information of a running program"
doesn't even make sense for most programs since they don't play music
anyway.

Your best bet is if the *specific* program you're interested in (e.g.
audacious) exposes this information programmatically in some way. It's
up to the developers of this application if and how they choose to do
it. Even if they do it, there's no requirement that the same API will
work for any other program of the same category, unless there is some
popular industry standard that most applications implement.

In short, you'll get more helpful replies at the audacious newsgroup.

HTH,
George


From rdm at rcblue.com  Wed May 28 10:58:19 2008
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 28 May 2008 07:58:19 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
Message-ID: <20080528145832.685CA1E4008@bag.python.org>

I've been using Ulipad, a free IDE mainly for Python, and written in 
wxPython, for a couple of years, and think it's terrific. Now another 
user, Kelie Feng, has made an 8-minute video showing it off. The 
visual clarity of the video is remarkable. You can download it 
(Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may 
be necessary for your player, from <http://www.rcblue.com/u3/>.

Dick Moores



From ian.g.kelly at gmail.com  Tue May 27 13:43:52 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 11:43:52 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <027e0b24$0$26906$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
Message-ID: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>

On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnjsal at nospamgmail.com> wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
> news:69g605F2v4102U2 at mid.uni-berlin.de...
>> After being corrected about missing the construction of a None-containing
>> list, one needs of course to think about the waste of resources, as a
>> possible result-list is created in any case.
>
> Yeah, I was already aware of the list of Nones, which is why I asked. Simply
> typing the list comprehension without an assignment just *looked* wrong,
> too.

It sounds like the wasteful list creation is the biggest objection to
using a list comprehension.  I'm curious what people think of this
alternative, which avoids populating the list by using a generator
expression instead (apart from the fact that this is still quadratic,
which I'm aware of).

def compress(s):
   new = []
   filter(None, (new.append(c) for c in s if c not in new))
   return ''.join(new)


From needin4mation at gmail.com  Thu May  1 10:59:49 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 07:59:49 -0700 (PDT)
Subject: simple beginner question about lists and negative index
Message-ID: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>

This program:

s = 'abcde'
i = -1
for i in range (-1, -len(s), -1):
    print s[:i], i

gives

abcd -1
abc -2
ab -3
a -4

Why doesn't the first one have the e if -1 is the end of the list?  In
Dive Into Python it said that -1 was the end of the list.  Thanks.

it is from Chun's book, slightly modified by me to see the index.


From gagsl-py2 at yahoo.com.ar  Fri May 16 23:27:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 May 2008 00:27:31 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
Message-ID: <op.ua93v5xsx6zn5v@gabriel2.softlabbsas.com.ar>

(warning: it's a rather long message)

En Fri, 16 May 2008 12:58:46 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:
> On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
> <gagsl-py2 at yahoo.com.ar> wrote:
>> En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
>> <dullrich at sprynet.com> escribi?:
>>
>>> The other day I saw a thread where someone asked
>>> about overrideable properties and nobody offered
>>> the advice that properties are Bad. So maybe we've
>>> got over that. I suppose properties could have
>>> Bad consequences if a user doesn't know they exist
>>> and think that a certain property of an object is
>>> just an ordinary attribute. But that applies to
>>> almost any aspect of any language.
>>
>> Which "bad consequences" are you thinking of?
>
> Didn't have anything specific in mind - there I was
> just playing devil's advocate. I've seen a lot of people
> here say things like "properties should only be used
> when refactoring" without any explanation that I could
> see of why properties were bad things. I was referring
> to whatever problems they had in mind.

I suppose those people were talking about this usage:

   def getfoo(self): return self._foo
   def setfoo(self, value): self._foo = value
   foo = property(getfoo, setfoo)

Just use a plain foo attribute instead. Almost nobody will notice the  
difference, and it's faster, easier to maintain, easier to test, less  
magic... But if you *do* have more to do besides handling the _foo  
attribute, using a property is OK, at least for me. And from your other  
comments, I can see it's fine for you too.

>>> If a person comes from, say, Object Pascal (Delphi)
>>> then properties are hard to live without. The
>>
>> You should read the article "Python is not Java" if you haven't done it  
>> yet.
>> http://dirtsimple.org/2004/12/python-is-not-java.html
>
> I suspect you misunderstood my point there. I actually read that
> article years ago. Been using Python for years. I'd never confuse
> it with OP, I promise (luckily I don't know any Java and don't
> intend to). I really didn't express what I meant very well - what
> I should have said was more like "If you're accustomed to properties
> from a language like OP they seem like a very useful addition to
> Python".

Oh, sure. I missed them a lot until they became available in Python. And I  
even wrote a fake property mixin class for Python 2.1 (horrible and slow!).
Now I understand better what you're saying.

>   window.pos = (x,y)
>
> seems more natural than
>
>   window.SetPos(x,y);
>
> in these cases the work involved in changing the cell
> value or the window position is going to make the
> extra overhead of the property interface irrelevant.

Sure, that looks like a good candidate for using a property.

>> But I prefer to have as little magic as possible on my objects: if it  
>> says m.row[0] = [1,2,3] I
>> expect m.row[0] to actually *be* that list (whenever possible), and not  
>> any other object initialized
>> from the [1,2,3] arguments. (Maybe this is some overreaction against  
>> C++ "magic" constructors and such horrible things...)
>
> Whatever - the idea here is that m.row[0] is going to walk and quack
> exactly like that list would, but also do other things that the liist
> can't do, like you can add two of them.
>
> (When you say anobject.aproperty = 2 you also expect aproperty to
> be 2? But if aproperty is a property that's not necessarily so - this
> seems like as much an argument against properties in general as
> against my version. Or perversion, if you like.)

No, I don't necesarily expect it, but I try to maintain that behavior as  
long as I can; I try to keep things simple and intuitive. This is a rather  
used idiom:

   items = foo.items = []
   for x in someiterator:
     if somecondition:
       ...
       items.append(x)
       ...

That works fine if foo.items is items - but if items were a property that  
holds its own internal list, the code above would be broken. In that case,  
replacing a simple attribute with a property would *not* be equivalent;  
and I try to follow the "principle of least astonishment" and avoid such  
situations as long as possible.

(I think that in OP the equivalent of m.row[0] = [1,2,3] isn't very usual  
- mostly because there isn't a list literal, I presume)

> _A_ workaround would be to simply not have indexedproperties
> be class attributes, instead saying self.whatever =
> indexedproprty(whatever) in __init__.

Unfortunately that doesn't work. Properties get their "magic" when  
searched in the class namespace - a property set as an instance attribute  
doesn't behave as a property at all, it's just an attribute as any other.

>> class Matrix2x2(object):
>>   def __init__(self):
>>     self.cells = [[0,0], [0,0]]
>>
>>   def __setitem__(self, (row, col), value):
>>     self.cells[row][col] = value
>>
>>   def __getitem__(self, (row, col)):
>>     return self.cells[row][col]
>>
>> class AClass(object):
>>   def __init__(self):
>>     self.cell = Matrix2x2()
>
> Well, something like this is where I was before coming up with
> the indexedproperty thing. Unless I'm missing something, which
> has happened before, what you write above can't work, because
> self.cell has to know what Matrix2x2 created it so it knows
> what AClass instance to modify when it's modified. (No, we
> can't just leave the state information in self.cells; think of the
> case of a Matrix with a row[] property and also a col[]
> property - they have to be modifying the data stored in
> the owning matrix.)

The above class works fine in the simple cases I tested it - including the  
bug involving two AClass instances. Adding "row" and "col" views is rather  
simple:

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2()
     self.row = ViewAsRow(self.cell)
     self.col = ViewAsCol(self.cell)

class ViewAsRow(object):
   def __init__(self, matrix):
     self.cells = matrix.cells

   def __getitem__(self, index):
     return self.cells[index][:]

   def __setitem__(self, index, row):
     self.cells[index][:] = row

class ViewAsCol(object):
   def __init__(self, matrix):
     self.cells = matrix.cells

   def __getitem__(self, index):
     return [row[index] for row in self.cells]

   def __setitem__(self, index, col):
     for row, value in zip(self.cells, col):
       row[index] = value

There is no need for the ViewAsCol nor ViewAsRow classes to know they're  
being used inside an AClass instance. (A better design would avoid to use  
matrix.cells - but I was constrained by the original Matrix2x2 design that  
I didn't want to modify.)

> (again, it doesn't have to be like that in this case,
> but it does in the case where various "properties"
> like cells are giving different sorts of access to the
> same data, which data then has to be stored in AClass.)

But you may have many references to the *same* data and view it in  
different ways - you don't have to walk thru the intermediate AClass  
"container" because AClass doesn't "store" data; the data is "stored" in  
the list itself, AClass instances only contain the name "cell" bound to  
the Matrix2x2 object.

In OP terms, all objects in Python act like those inheriting from TObject,  
not like basic types (numbers, char, string...). An important difference  
is that Python takes care of automatic object deletion when they're no  
longer used, but in OP you have to manage the object's lifetime yourself.  
So in OP it is important *who* owns some object; and sharing a TList  
instance -by example- isn't so frequent because when the list is freed all  
its references become invalid (so one needs some kind of notification...)
In Python, on the other side, many objects may have a reference to the  
same other one, like the Matrix above - it won't disappear until nobody  
else references it. This sharing behavior may be a Good Thing or a Bad  
Thing, depending on the circumstances. By example, the ViewAsRow class  
above *could* return an actual list from the Matrix2x2 instance, but I  
choose not to, to emphasize that it's a *view* of the underlying data  
(else, modifications to the returned list would alter the data itself).

> And then that's the point to the indexedproperty;
> the code passing data back and forth doesn't need
> to be rewritten with each property, it's all done
> inside the implementation of the indexedproperty
> class. I realized that I could just use object attributes
> instead, but it seems to me that indexedproperty
> encapsulates the data-passing protcol once and for
> all instead of requiring it to be redone each time.

I don't understand what you call "data-passing protocol"; as far as I can  
tell, there is no data-passing, only names refering to the same and unique  
object instance.

-- 
Gabriel Genellina



From dullrich at sprynet.com  Wed May 14 17:39:13 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 16:39:13 -0500
Subject: sys.excepthack...
References: <mailman.1136.1210799421.12834.python-list@python.org>
Message-ID: <dullrich-30C8F0.16391314052008@text.giganews.com>

In article <mailman.1136.1210799421.12834.python-list at python.org>,
 Jean-Paul Calderone <exarkun at divmod.com> wrote:

> On Wed, 14 May 2008 15:47:18 -0500, "David C. Ullrich" <dullrich at sprynet.com> 
> wrote:
> > [snip]
> >
> >Came up with a ridiculous hack involving both sys.stderr
> >and sys.excepthook. Works exactly the way I want.
> >Seems ridiculous - what's the right way to do this?
> >
> > [snip]
> 
> Hi David,
> 
> Take a look at the traceback module.  The excepthook gets called with
> an exception type, instance, and traceback object.  The traceback module
> is good at turning these things into strings.

Thanks.

> Jean-Paul

-- 
David C. Ullrich


From bockman at virgilio.it  Mon May 19 15:02:33 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Mon, 19 May 2008 21:02:33 +0200
Subject: ftplib returns EOFError
References: <mailman.1340.1211196486.12834.python-list@python.org>
Message-ID: <pan.2008.05.19.19.02.29.689174@virgilio.it>

On Mon, 19 May 2008 13:27:23 +0100, Jon Bowlas wrote:

> Hi All,
> 
> I've written a little method to connect to an ftpserver which works well,
> however when I send a file using this ftp connection oddly I _sometimes_ get
> returned an EOFError from ftplib.getline even though my file is actually
> transferred. 
> 
> Here's my script:
> 
>     def uploadViaFtp(self, file, filename):
>         '''A method to upload a file via ftp'''
>         ftpserverloc = self.getItunesUftpServer()
>         ftpserverusername = self.getItunesUftpUser()
>         ftpserverpassword = self.getItunesUftpPsswd()
>         ftp = ftplib.FTP(ftpserverloc)
>         ftp.login(ftpserverusername, ftpserverpassword)
>         try:
>             ftp.storbinary("STOR " + filename, file, 1024)
>         finally:
>             file.close()
>         ftp.quit()
> 
> 
> And here's the traceback:
> Traceback (innermost last):
>   Module ZPublisher.Publish, line 114, in publish
>   Module ZPublisher.mapply, line 88, in mapply
>   Module ZPublisher.Publish, line 40, in call_object
>   Module Products.FileSystemSite.FSPythonScript, line 108, in __call__
>   Module Shared.DC.Scripts.Bindings, line 311, in __call__
>   Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
>   Module Products.FileSystemSite.FSPythonScript, line 164, in _exec
>   Module None, line 28, in upload_submit
>    - <FSPythonScript at
> /silva/service_views/UCLItunesUPodcast/edit/Asset/UCLItunesUTrack/upload_sub
> mit>
>    - Line 28
>   Module Products.UCLItunesUPodcast.UCLItunesUService, line 138, in
> uploadViaFtp
>   Module ftplib, line 523, in quit
>   Module ftplib, line 246, in voidcmd
>   Module ftplib, line 221, in voidresp
>   Module ftplib, line 207, in getresp
>   Module ftplib, line 193, in getmultiline
>   Module ftplib, line 183, in getline
> EOFError
> 
> 
> Any help in catching and ignoring this error would be greatly appreciated.
> 
> Regards
> 
> Jon

ftp.quit() attempts to send a quit command and wait for the response
before closing. Apparently, sometime the connection is already closed
(don't know why) and you get the exception.

I guess you could do something like this:

 try:
	ftp.quit()
 except EOFError:
       ftp.close()


Ciao
-----
FB


From apardon at forel.vub.ac.be  Thu May 22 05:46:23 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 22 May 2008 09:46:23 GMT
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<69imp0F33sdj6U1@mid.uni-berlin.de>
Message-ID: <slrng3ag7e.2u6.apardon@rcpc42.vub.ac.be>

On 2008-05-21, Diez B. Roggisch <deets at nospam.web.de> wrote:
> boblatest at googlemail.com wrote:
>
>> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> 
>>> Although that solution is pretty, it is not the canonical solution
>>> because it doesn't cover the important case of "if" bodies needing to
>>> access common variables in the enclosing scope.  (This will be easier
>>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>>> IMHO closer to a canonical solution to this FAQ.
>> 
>> Hello everybody,
>> 
>> thanks for the various answers. I'm actually pretty puzzled because I
>> expected to see some obvious solution that I just hadn't found before.
>> In general I find Python more elegant and syntactically richer than C
>> (that's where I come from), so I didn't expect the solutions to be a
>> lot more verbose and/or ugly (no offense) than the original idea which
>> would have worked if Python's assignment statement would double as
>> expression, as in C.
>
> Well, it's a design-decision - and I'm pretty ok with it being a bit verbose
> here - as it prevents a *great* deal of programming errors that would
> otherwise happen from accidentally writing a = b where a == b was meant.

But that is an error that occurs because of the specific symbols chosen
to represent an assignment or equality test. At the time python was
first designed, other symbols for assignment were already used for
in other languages, like := and <-

So if preventing errors was the main motivation why not allow an
assignment to be an expression but use a symbol for the assignment
that would prevent those kind of errors?

I find it hard to believe that a design choice like whether or not
to have the assignment behave as an expression or not, was decided
on the ground of a particulare lexical representation of the assignment
symbol.

-- 
Antoon Pardon


From inhahe at gmail.com  Fri May 23 15:44:03 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:44:03 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<7xk5hll2hz.fsf@ruckus.brouhaha.com>
Message-ID: <s7FZj.19192$255.11799@bignews8.bellsouth.net>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xk5hll2hz.fsf at ruckus.brouhaha.com...
> "inhahe" <inhahe at gmail.com> writes:
>> planets are spherical (all implementations of Python are not natively
>> compiled (and you said for whatever definition)), and b) It's a far cry 
>> to
>> imagine a planet coming into being that's not spherical (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
> There are native Python compilers, see psyco and pypy.

That does complicate the question since there are 4 levels of executing code

interpreted
bytecode-compiled-interpreted
jit-complied
natively compiled

i've tried psyco a few times and never noticed much of a speed increase.  if 
any.
and then on the other hand, .net is supposed to be almost as fast as C 
because of its JIT. but the whole issue of the speed of .net seems to be 
enshrouded in mystery, so who knows.





From deets at nospam.web.de  Mon May 19 09:40:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 15:40:16 +0200
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <69deb2F31deqmU1@mid.uni-berlin.de>

Roel Schroeven wrote:

> Bruno Desthuilliers schreef:
>> 1/ being interpreted or compiled (for whatever definition of these
>> terms) is not a property of a language, but a property of an
>> implementation of a language.
>> 
>> 2/ actually, all known Python implementations compile to byte-code.
>> 
> 
> You keep saying that, and in theory you're right. But I'm still inclined
> to disagree with it, since the practical reality is different. Python is
> indeed compiled to byte code, but if you compare that byte code with
> assembly code you'll see that there's a whole world of difference
> between the two, largely because of the dynamical nature of Python. Fact
> is that Python was designed from the start to run on a virtual machine,
> not on the native hardware.
> 
> C OTOH was designed to be compiled to assembly code (or directly to
> machine code) and as a result there are no (or virtually) no
> implementations that interpret C or compile it to bytecode.
> 
> I love Python, but IMHO it's a bit silly to maintain that the fact that
> Python compiles to byte code instead of assembly code/machine code is
> purely a matter of implementation; on the contrary, I believe it's a
> result of its design. I also think that there's a large difference
> between byte code and machine code (in Python's case; I haven't looked
> at other languages), and that it's a bit silly to try to trivialize that
> difference.

I strongly disagree. See the Java which is compiled to bytecode
*explicitly*, jet the JVM-bytecode is closer to Python than to what C++ is
compiled to. But then, it's possible to have JIT-compilers that bring
machine code back into the picture.

And see python + psyco as JIT. 

And OTOH see Objective-C and it's runtime for an example of a
machine-code-compiled language that still has huge dynamic runtime parts. 

All these blur the image extremely and make Bruno's point: compilation is an
artifact, not some inherent property of a language.

Diez




From gneuner2/ at /comcast.net  Thu May  8 01:05:34 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Thu, 08 May 2008 01:05:34 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>

On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
<xahlee at gmail.com> wrote:

>I'd like to introduce a blog post by Stephen Wolfram, on the design
>process of Mathematica. In particular, he touches on the importance of
>naming of functions.
>
>? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
>Wolfram
> http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/
>
>The issue is fitting here today, in our discussion of ?closure?
>terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
>meaning space vs single-meaning space), ?tail recursion?, ?currying?,
>?lambda?, that perennially crop up here and elsewhere in computer
>language forums in wild misunderstanding and brouhaha.
>
>The functions in Mathematica, are usually very well-name, in contrast
>to most other computing languages. In particular, the naming in
>Mathematica, as Stephen Wolfram implied in his blog above, takes the
>perspective of naming by capturing the essense, or mathematical
>essence, of the keyword in question. (as opposed to, naming it
>according to convention, which often came from historical happenings)
>When a thing is well-named from the perspective of what it actually
>?mathematically? is, as opposed to historical developments, it avoids
>vast amount of potential confusion.
>
>Let me give a few example.
>
>? ?lambda?, widely used as a keyword in functional languages, is named
>just ?Function? in Mathematica. The ?lambda? happend to be called so
>in the field of symbolic logic, is due to use of the greek letter
>lambda ??? by happenstance. The word does not convey what it means.
>While, the name ?Function?, stands for the mathematical concept of
>?function? as is.

Lambda is not a function - it is a function constructor.   A better
name for it might be MAKE-FUNCTION.  

I (and probably anyone else you might ask) will agree that the term
"lambda" is not indicative of it's meaning, but it's meaning is not
synonymous with "function" as you suggest.

I suspect Mathematica of just following historical convention itself.
Mathematica uses the term inappropriately just as it was (ab)used in
Pascal (circa 1970).  I'm not aware of earlier (ab)uses but there
probably were some.


>? Module, Block, in Mathematica is in lisp's various ?let*?. The
>lisp's keywords ?let?, is based on the English word ?let?. That word
>is one of the English word with multitudes of meanings. If you look up
>its definition in a dictionary, you'll see that it means many
>disparate things. One of them, as in ?let's go?, has the meaning of
>?permit; to cause to; allow?. This meaning is rather vague from a
>mathematical sense. Mathematica's choice of Module, Block, is based on
>the idea that it builds a self-contained segment of code. (however,
>the choice of Block as keyword here isn't perfect, since the word also
>has meanings like ?obstruct; jam?)

"Let" is the preferred mathematical term for introducing a variable.
Lisp uses it in that meaning.  What a word means or doesn't in English
is not particularly relevant to its use in another language.  There
are many instances of two human languages using identical looking
words with very different meanings.  Why should computer languages be
immune?


>? Functions that takes elements out of list are variously named First,
>Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
>opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
>?unshift?, in lisps and perl and other langs.

Lisp has "first" and "rest" - which are just synonyms for "car" and
"cdr".  Older programmers typically prefer car and cdr for historical
reasons, but few object to the use of first and rest except for
semantic reasons - Lisp does not have a list data type, lists are
aggregates constructed from a primitive pair data type.  Pairs can be
used to construct trees as well as lists and "rest" has little meaning
for a tree.  When used with lists, first and rest are meaningful terms
and no one will object to them.

Besides which, you easily create synonyms for car and cdr (and
virtually any other Lisp function) with no more burden on the reader
of your code than using a C macro.  You can call them "first and
rest", or "first and second", or "left and right", or "red and black"
or whatever else makes sense for your data.

People coming to Lisp from other languages often complain of macros
that they have to learn "a new language" every time they read a
program.  But in fact, the same is true in all languages - the reader
always has to learn the user-defined functions and how they are used
to make sense of the code.  In that sense Lisp is no different from
any other language.

Common Lisp doesn't have "filter".  Even so, with respect to the
merits of calling a function "extract" or "select" versus "filter", I
think that's just a matter of familiarity.  The term "filter" conveys
a more general idea than the others and can, by parameterization,
perform either function.


>The above are some examples. The thing to note is that, Mathematica's
>choices are often such that the word stands for the meaning themselves
>in some logical and independent way as much as possible, without
>having dependent on a particular computer science field's context or
>history. One easy way to confirm this, is taking a keyword and ask a
>wide audience, who doesn't know about the language or even unfamiliar
>of computer programing, to guess what it means. The wide audience can
>be made up of mathematicians, scientists, engineers, programers,
>laymen. This general audience, are more likely to guess correctly what
>Mathematica's keyword is meant in the language, than the the name used
>in other computer languages who's naming choices goes by convention or
>context.
>
>(for example, Perl's naming heavily relies on unix culture (grep,
>pipe, hash...), while functional lang's namings are typically heavily
>based on the field of mathematical logic (e.g. lambda, currying,
>closure, monad, ...). Lisp's cons, car, cdr, are based on computer
>hardware (this particular naming, caused a major damage to the lisp
>language to this day). (Other examples: pop, shift are based on
>computer science jargon of ?stack?. Grep is from Global Regular
>Expression Print, while Regular Expression is from theoretical
>computer science of Automata... The name regex has done major hidden
>damage to the computing industry, in the sense that if it have just
>called it ?string patterns?, then a lot explanations, literatures,
>confusions, would have been avoided.))
>
>(Note: Keywords or functions in Mathematica are not necessarily always
>best named. Nor are there always one absolute choice as best, as there
>are many other considerations, such as the force of wide existing
>convention, the context where the function are used, brevity,
>limitations of English language, different scientific context (e.g.
>math, physics, engineering), or even human preferences.)
>
>----------------------------
>
>Many of the issues regarding the importance and effects of
>terminology's quality, i've wrote about since about 2000. Here are the
>relevant essays:
>
>? Jargons of Info Tech Industry
> http://xahlee.org/UnixResource_dir/writ/jargons.html
>
>? The Jargon ?Lisp1? vs ?Lisp2?
> http://xahlee.org/emacs/lisp1_vs_lisp2.html
>
>? The Term Curring In Computer Science
> http://xahlee.org/UnixResource_dir/writ/currying.html
>
>? What Is Closure In A Programing Language
> http://xahlee.org/UnixResource_dir/writ/closure.html
>
>? What are OOP's Jargons and Complexities
> http://xahlee.org/Periodic_dosage_dir/t2/oop.html
>
>? Sun Microsystem's abuse of term ?API? and ?Interface?
> http://xahlee.org/java-a-day/interface.html
>
>? Math Terminology and Naming of Things
> http://xahlee.org/cmaci/notation/math_namings.html
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/
>
>?

George
--
for email reply remove "/" from address


From castironpi at gmail.com  Mon May  5 13:08:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 10:08:29 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com> 
	<mailman.570.1209965348.12834.python-list@python.org>
Message-ID: <cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>

On May 5, 12:28?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 05 May 2008 00:09:02 -0300, hdante <hda... at gmail.com> escribi?:
>
>
>
>
>
> > ?Isn't this guy a bot ? :-) It's learning fast. I believe there is a
> > "frame" in C, composed of its stack and globals. For generators in C,
> > you may look for "coroutines". For example, see:
>
> >http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
>
> > ?A sample code follows:
>
> > #define crBegin static int state=0; switch(state) { case 0:
> > #define crReturn(i,x) do { state=i; return x; case i:; } while (0)
> > #define crFinish }
> > int function(void) {
> > ? ? static int i;
> > ? ? crBegin;
> > ? ? for (i = 0; i < 10; i++)
> > ? ? ? ? crReturn(1, i);
> > ? ? crFinish;
> > }
>
> > ?The "suspended state" is saved in the static variable. It's not
> > necessary to save the complete "frame", only the suspended state.
>
> Quoting the author himself, "this is the worst piece of C hackery ever seen"
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

At some point, code goes "on" and "off" the processor, which knowledge
I do owe to spending money.  Thus, if the group news is a localcy
(other dimension of currency), that's bounce check the house dollar.
What do [second person plural] spend on [vernacular]?

More strictly speaking, processor freely goes on and off binaries.  Is
Goto a hardware instruction?  Perhaps a Linux-Python-binding could
yield a frame, pun intended.  Do [you] have access the file system?

Could yield merely be implemented as multiple strings of processses?
Get the variables on disk.  Question is, is it worth optimizing away
from flash rom?  There's a gig of chips in a bowling ball.




From __peter__ at web.de  Sun May 18 15:30:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 May 2008 21:30:57 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <g0q05b$f3r$03$1@news.t-online.com>

Matt Porter wrote:

> I'm trying to compress a string.
> E.g:
>   "AAAABBBC" -> "ABC"

Two more:

>>> from itertools import groupby
>>> "".join(k for k, g in groupby("aaaaaabbbbbbbbbbcccccc"))
'abc'

>>> import re
>>> re.compile(r"(.)\1*").sub(r"\1", "aaaaaaabbbbcccccccc")
'abc'

Peter


From vadim.pestovnikov at gmail.com  Thu May  1 10:32:57 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:32:57 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819d093$0$6552$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <91a8146e-507d-4dc9-ac47-1cff54f541f2@y38g2000hsy.googlegroups.com>

On May 1, 10:17 am, Ralf Sch?nian <r... at schoenian-online.de> wrote:
> idev schrieb:
>
>
>
> > Hi all,
> > Please help me with my stuff.
>
> > I downloaded python 2.5.1 package fromhttp://blastwave.orgit was
> > compiled using Sun Studio 11 for Solaris 8 sparc.
>
> > My system is Solaris 10 sparc and I compiled using SunStudio 11
> > psycopg2 python binding for PostgreSQL 8.3.1.
>
> > Compilation was OK, but when I am trying to import psycopg2 I am
> > getting this error:
>
> > $ python
> > Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> import psycopg2
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
> > 60, in <module>
> >     from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
> > ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
> > lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> > referenced symbol not found
>
> > Any suggestions or help will be appreciated.
>
> Hi,
>
> maybe a stupid question - but why don't you want to use the "official"
> package? You can download it here:http://sunfreeware.mirrors.tds.net/indexsparc10.html
>
> Regards,
> Ralf

I am trying to deploy Django env (apache2.x prefork MPM; mod_python
3.3.1; python 2.5.1; postgresql 8.3.x; psycopg2-2.0.7; subversion
1.4.5.x; openssl 0.98;) on Solaris 10 sparc box.
You are right they have pretty much everything what I need except
mod_python and psycopg2. So the first problem was PostgreSQL. It was
compiled without (--with-thread-safety) just ./configure. I compiled
psycopg2 by myself using gcc but I couldn't compile mod_pyhon by some
reasons. That is why I switched to blastwave.org they have everything
what I need except psycopg2. I compiled it by my self. And now I am
having the ld problems and I don't know how to resolve it.


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From castironpi at gmail.com  Tue May 13 06:45:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:45:17 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <d70fafc7-ec53-472d-8f5d-604740fa64e8@f63g2000hsf.googlegroups.com>

On May 13, 5:28?am, dannywebs... at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
> >>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host. ?I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
> >>> f=str(f)
> >>> f.split()
>
> ["['host1","host2", ... ,"hostN\n']"]
>
> Any help is highly appreciated
>
> ta
>
> dan.

Bring up the Google Ring.  Where you only wiggle fingers, it might pay
to get jobs at home.  All we up here would have to do would be
schedule something.  Make a decision is easy in talking.  I think it
would be easy to centralize the time the world's at and redistribute
money.  If all we'd do is normal life, this constrained, open markets
would be easy to set up.  It's just illegal to talk about pricing in
2004 Microecon. classes.


From pavlovevidence at gmail.com  Thu May  1 12:45:28 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 09:45:28 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
Message-ID: <790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>

On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> > IMO .ini-like config files are from the stone age. The modern approach is
> > to use YAML (http://www.yaml.org).
>
> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> and so comprehensively and completely fails to achieve its stated
> main goal of being "readable by humans", that I had assumed it
> was an April Fool along the lines of Intercal or brainf***.


YAML, ISTM, took a simple concept that worked for small,
straightforward data, and tried to make into a format that could
anything anywhere, with disastrous results.  It's not unlike Perl in
this regard.  It's quite ridiculous.


My recommendation to the OP would be:

If you intend to write a GUI that completely sets all the options, use
XML.  You can bet there are some users who would prefer text editing
options files, and XML, while not the most readable format available,
at least gives users the option.

If you don't intend to write a GUI to do that, write a simple text
file parser (if the options are simple), use ConfigParser, or use a
Python file that you exec.

Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
ApplicationData/Appname/config.ext on Windows.  I don't recommend
using the Windows registry to store options; use it to modify Windows
behavior (like file associations) but keep your own program's options
in your own file.


Carl Banks


From carsten.haese at gmail.com  Thu May  1 23:46:37 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Thu, 01 May 2008 23:46:37 -0400
Subject: help with list comprehension
In-Reply-To: <WtvSj.108013$Cj7.100899@pd7urf2no>
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
Message-ID: <x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>

Yves Dorfsman wrote:
> 
> In the following script, m1() and m2() work fine. I am assuming m2() is 
> faster although I haven't checked that (loops through the list twice 
> instead of once).

Well, let's check it:

$ python -m timeit -s "import x" "x.m1()"
100000 loops, best of 3: 6.43 usec per loop

$ python -m timeit -s "import x" "x.m2()"
100000 loops, best of 3: 8.34 usec per loop

As it turns out, m1 is faster than m2. The reason is that list 
comprehensions do the loop in C, whereas the for-append pattern does the 
loop on the Python level.

> Now what I am trying to do is something like m3(). As currently written 
> it does not work, and I have tried different ways, but I haven't managed 
> to make it work.
> 
> Is there a possibility ? Or is m2() the optimum ?
> 
> [...] 
> def m1():
>   colours = [ e['colour'] for e in l ]
>   nums    = [ e['num']    for e in l ]
> 
> def m2():
>   colours = []
>   nums    = []
>   for e in l:
>     colours.append(e['colour'])
>     nums.append(e['num'])
> 
> #def m3():
> #  colours, nums = [ e['colour'], e['num'] for e in l ]

m3 doesn't work because you're building a list of 10 color/number pairs 
that you're trying to unpack that into just two names. The working 
"derivative" of m3 is m1, which is the most natural, fastest and 
clearest solution to your problem.

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From wizzardx at gmail.com  Sun May  4 03:54:14 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 09:54:14 +0200
Subject: generator functions in another language
In-Reply-To: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
Message-ID: <18c1e6480805040054s44c8d050h7449a4c3848bdc81@mail.gmail.com>

On Sun, May 4, 2008 at 1:39 AM,  <castironpi at gmail.com> wrote:
> I'm actually curious if there's a way to write a generator function
>  (not a generator expression) in C, or what the simplest way to do it
>  is... besides link the Python run-time.
>  --

Here's the itertools C code:

http://svn.python.org/view/python/trunk/Modules/itertoolsmodule.c?rev=61634&view=markup

David.


From yhvh2000 at googlemail.com  Fri May  9 06:01:22 2008
From: yhvh2000 at googlemail.com (yhvh)
Date: Fri, 9 May 2008 03:01:22 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
	<c45e0065-0ceb-4f72-b267-c63fb128962d@p25g2000pri.googlegroups.com>
Message-ID: <ff55f5e6-467a-4d86-9493-1f3a7fa3f060@m45g2000hsb.googlegroups.com>

> > x = [0010, 0210]
>
> You do realize that this is octal, right?
It's unfortunate I choose that, the numbers go beyond octal

> len is undefined for integers. ?Perhaps you meant "len(str(x[1]))".
Yes sorry it was late at night :P


> You can, however, do this:
> >>> '%0*d' % (5, 123)
> '00123'

This is exactly what I needed Thank-you kindly


From s0suk3 at gmail.com  Wed May 28 04:59:19 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Wed, 28 May 2008 01:59:19 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
Message-ID: <3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>

On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
> s0s... at gmail.com wrote:
> > I wanted to ask for ways to test whether a path exists. I usually use
> > os.path.exists(), which does a stat call on the path and returns True
> > if it succeeds, or False if it fails (catches os.error). But stat
> > calls don't fail only when a path doesn't exist. I see that, at least
> > on Windows, the instance of the exception has an attribute 'errno' set
> > to 2 when it fails because the path doesn't exist. Is it a portable
> > solution to rely on this (haven't tried it on Linux)? Are there other
> > ways of testing whether a path exists?
>
> > Thanks,
> > Sebastian
>
> "import errno" and see if the exception's errno attribute is set to
> errno.ENOENT (which is, yes, 2). It is portable.
>
> If you Google [ENOENT Windows] or whatever, there are some differences
> on different platforms, but not many.

Thanks. So if OSError().errno == errno.ENOENT, then it means the path
doesn't exist? (What does "ENOENT" stan for?)


From deets at nospam.web.de  Sat May 24 13:19:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 19:19:30 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <48382917$0$20800$426a74cc@news.free.fr>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
Message-ID: <69r113F34rbeeU1@mid.uni-berlin.de>

kib schrieb:
> Diez B. Roggisch a ?crit :
>> Tool69 schrieb:
>>> Hi,
>>>
>>> Until now, I was running my own static site with Python, but I'm in
>>> need of dynamism.
>>>
>>> After reading some cgi tutorials, I saw Joe Gregorio's old article
>>> "Why so many Python web frameworks?" about wsgi apps [http://
>>> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
>>> question about it. The code he gave works like a charm (I had to make
>>> a little change because SQLAlchemy has changed since), but how the
>>> hell can I serve static files (css, js, images, etc.) within an wsgi
>>> app, ie inside a '/static' directory ?!
>>
>> There is a wsgi-app out there that is called "static". Use that.
>>
>> And it's the first hit on google "wsgi static"... :)
>>
>> http://lukearno.com/projects/static/
>>
>> Diez
> 
> Hi Diez,
> 
> and thanks for yout help. In fact I already found it but never managed 
> to get it work because the static doc says :
> 
> from wsgiref.simple_server import make_server
> import static
> make_server('localhost', 9999, static.Cling('/var/www')).serve_forever()
> 
> and inside J.Gregorio's tutorial it is:
> 
> from wsgiref.simple_server import WSGIServer, WSGIRequestHandler
> httpd = WSGIServer(('localhost', 8080), WSGIRequestHandler)
> httpd.set_app(urls.urls)
> 
> It does not use 'make_server()' so how can I adapt it ?

static.Cling is a wsgi-app. The other code just makes a specific 
wsgi-implementation based server out of it.


> I finally managed to work with static files with a little hack, but it's 
> ugly because I'm reading each static file per request.

How else should that work? Apache does that the same way.

Diez


From lists at cheimes.de  Thu May  1 13:55:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 19:55:21 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A0409.6040706@cheimes.de>

Torsten Bronger schrieb:
> Hall?chen!
> 
> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

Try "python setup.py register sdist upload"

Christian



From castironpi at gmail.com  Tue May 13 06:59:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:59:56 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
	<mailman.1038.1210675085.12834.python-list@python.org>
Message-ID: <b2f9fb65-b989-4c28-b7c5-9909961ad555@m73g2000hsh.googlegroups.com>

On May 13, 5:37?am, Christian Heimes <li... at cheimes.de> wrote:
> wxPytho... at gmail.com schrieb:
>
> > We have to avoid the use of the 'is' identity operator with basic,
> > immutable values such as numbers and strings. The result is
> > unpredictable because of the way Python handles these objects
> > internally.
>
> You are confusing immutable objects with singletons. Never use "is" with
> strings and numbers.
>
> Christian

I was back on 'handle'.  Handle internally, handle right.  Gotta be 6
a.m.


From castironpi at gmail.com  Wed May  7 20:11:14 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:11:14 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com> 
	<35e4c5fb-d09f-492d-a165-f03be93ff465@8g2000hse.googlegroups.com>
Message-ID: <9bbbeed6-6be1-4261-8a68-c6b91a424f85@s50g2000hsb.googlegroups.com>

On May 7, 5:27?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 7 mai, 23:51, "bruno.desthuilli... at gmail.com"<bruno.desthuilli... at gmail.com> wrote:
>
> (snip)
>
> Small improvement thanks to Paul Rubin:
>
> from collections import defaultdict
> from operator import itemgetter
>
> def get_letters_frequency(source):
> ? ? letters_count = defaultdict(int)
> ? ? for letter in source:
> ? ? ? ? letters_count[letter] += 1
> ? ? ? return sorted(
> ? ? ? ? ? letters_count.iteritems(),
> ? ? ? ? ? key=itemgetter(1),
> ? ? ? ? ? reverse=True
> ? ? ? ?)

I have a bounce on mostfreq("abbcccddddeeeeeffffff").  It's more
useful when it runs in real time, i.e. persists.  Can I write database
code on time in a pickle?

serial= depickle( uniqueA )
serial.append( "a" )
repickle( uniqueA, serial )

I have to keep control during three ops.


From arnodel at googlemail.com  Wed May 28 02:43:30 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 07:43:30 +0100
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>
	<Is__j.39066$dq6.8748@en-nntp-09.dc1.easynews.com>
Message-ID: <m2skw33p4d.fsf@googlemail.com>

"Joel Koltner" <zapwireDASHgroups at yahoo.com> writes:

> "Paul Hankin" <paul.hankin at gmail.com> wrote in message 
> news:0ea08237-c9f9-441b-a744-7410114b5ae9 at t54g2000hsg.googlegroups.com...
> "Did you actually write self,args = args?"
>
> (looks at source code)
>
> $#@#%#$  Why, yes, yes I did!  Thanks for catching that...

This is odd, because you should get this error even if writing
self.args=args, witness this copy-paste from the interactive prompt:

>>> class MyError(Exception):
...     def __init__(self, args=None):
...         self.args = args
... 
>>> MyError()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in __init__
TypeError: 'NoneType' object is not iterable

-- 
Arnaud


From jstucklex at attglobal.net  Wed May 28 12:58:23 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Wed, 28 May 2008 12:58:23 -0400
Subject: php vs python
In-Reply-To: <298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
Message-ID: <naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>

cokofreedom at gmail.com wrote:
> On May 28, 1:42 pm, Michael Fesser <neti... at gmx.de> wrote:
>> .oO(Ivan Illarionov)
>>
>>> No. Language does matter.
>> And the weather.
>>
>> If you know how to program, you can write good code in any language if
>> you're familiar enough with it. Many people write good code in PHP, and
>> many write total crap in C/C++. It's almost never about the language,
>> but about the programmer.
>>
>> Micha
> 
> I'd like to see someone coming from an OO programming background write
> good Haskell, Pure Functional Programming code even with a high level
> of OO experience. Language matters.

Actually, I think it would be easier than a functional programmer 
converting to an OO paradigm.

And the caveat was *if you're familiar enough with it*.

A good OO programmer could easily write good functional code.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 01:20:33 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 00:20:33 -0500
Subject: People still using Tkinter?
Message-ID: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>

Any guesses as to how many people are still using Tkinter? And can  
anyone direct me to good, current docs for Tkinter?

Thanks,
Ken


From bj_666 at gmx.net  Tue May 20 03:05:20 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 07:05:20 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
Message-ID: <69fbhgF2uih6aU5@mid.uni-berlin.de>

On Tue, 20 May 2008 13:57:26 +1000, James A. Donald wrote:

> The larger the program, the greater the likelihood of inadvertent name
> collisions creating rare and irreproducible interactions between
> different and supposedly independent parts of the program that each
> work fine on their own, and supposedly cannot possibly interact.

How should such collisions happen?  You don't throw all your names into
the same namespace!?

Ciao,
	Marc 'BlackJack' Rintsch


From parydacaheh48 at hotmail.com  Sat May 17 20:09:00 2008
From: parydacaheh48 at hotmail.com (parydacaheh48)
Date: Sat, 17 May 2008 20:09:00 -0400
Subject: We have the best watch copies on the web
Message-ID: <BLU106-DAV13041A9406AC055BDD7043BBCA0@phx.gbl>

We have the most detailed Copies

All the expensive brands

http://pyfanihavib20.blogspot.com




From wizzardx at gmail.com  Sat May 24 16:17:21 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 22:17:21 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
Message-ID: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>

>> In order to get a new system working, it's nice to be able to throw
>> together a set of modules quickly, and if that doesn't work, scrap it
>> and try something else. There's a rule (forget where) that your first
>> system will always be a prototype, regardless of intent.
>
> That's fine. It's alright to prototype without tests. The only rule is that
> you cannot then use any of that code in production.
>

So, at what point do you start writing unit tests? Do you decide:
"Version 1 I am going to definitely throw away and not put it into
production, but version 2 will definitely go into production, so I
will start it with TDD?".

Where this doesn't work so well is if version 2 is a refactored and
incrementally-improved version of version 1. At some point you need to
decide "this is close to the version that will be in production, so
let's go back and write unit tests for all the existing code".

>> Problem 3: Slows down development in general
>>
>> Having to write tests for all code takes time. Instead of eg: 10 hours
>> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>> writing all the tests, and 10 on the code.
>>
> You are either a very slow coder or a very poor tester: there should be a
> lot more than 1/2 hour testing for 10 hours coding. I would say the
> comparison might be 10 hours coding, 10 hours testing, then about a week
> tracking down the bugs which escaped testing and got out to the customers.
> With proper unit tests you will reduce all 3 of these numbers but
> especially the last one. Any bug which gets away from the programmer and is
> only caught further downstream costs vastly more than bugs caught during
> development, and not just for the programmer but everyone else who
> affected.

Seriously, 10 hours of testing for code developed in 10 hours? What
kind of environment do you write code for? This may be practical for
large companies with hordes of full-time testing & QA staff, but not
for small companies with just a handful of developers (and where you
need to borrow somone from their regular job to do non-developer
testing). In a small company, programmers do the lions share of
testing. For programmers to spend 2 weeks on a project, and then
another 2 weeks testing it is not very practical when they have more
than one project.

As for your other points - agreed, bugs getting to the customer is not
a good thing. But depending on various factors, it may not be the end
of the world if they do. eg: There are many thousands of bugs in open
source bug trackers, but people still use open source for important
things. Sometimes it is better to have software with a few bugs, than
no software (or very expensive, or very long time in development). See
"Worse is Better": http://en.wikipedia.org/wiki/Worse_is_better. See
also: Microsoft ;-)

>
> You seem to think that people are suggesting you write all the tests up
> front: what you should be doing is interleaving design+testing+coding all
> together. That makes it impossible to account for test time separately as
> the test time is tightly mixed with other coding, what you can be sure
> though is that after an initial slowdown while you get used to the process
> your overall productivity will be higher.

Sounds like you are suggesting that I obfuscate my development process
so noone can tell how much time I spent doing what :-)

I think that moderate amounts of unit tests can be beneficial and not
slow down development significantly (similar to a bit more time spent
using version control vs not using it at all). Regression tests is a
good example. But going to the TDD extreme of always coding tests
before *any* code, for *all* projects, does not sit well with me (bad
analogy: similar to wasting time checking in each line into version
control separately, with a paragraph of comments).

>
> The first time you make a change to some code and a test which is
> apparently completely unrelated to the change you made breaks is the point
> when you realise that you have just saved yourself hours of debugging when
> that bug would have surfaced weeks later.
>

The next time your project is running late, your manager and the
customer will be upset if you spend time updating your unit tests
rather than finishing off the project (and handing it over to QA etc)
and adding the unit tests when there's actually time for it.

>> Clients, deadlines, etc require actual software, not
>> tests for software (that couldn't be completed on time because you
>> spent too much time writing tests first ;-)).
>
> Clients generally require *working* software. Unfortunately it is all too
> easy to ship something broken because then you can claim you completed the
> coding on time and any slippage gets lost in the next 5 years of
> maintenance.

That's why you have human testing & QA. Unit tests can help, but they
are a poor substitute. If the customer is happy with the first
version, you can improve it, fix bugs, and add more unit tests later.

David

PS: To people following this thread: I don't mean to be argumentative.
This is a subject I find interesting and I enjoy the debate. I'm
playing devil's advocate (troll?) to provoke further discussion.


From tinnews at isbd.co.uk  Sun May 11 06:36:31 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 11 May 2008 10:36:31 GMT
Subject: How to uninstall something installed by "setup.py install"?
Message-ID: <4826cc2f$0$655$bed64819@news.gradwell.net>

I have installed a development version of rdiff-backup using its
"setup.py install" but now find I need to uninstall it.  Is there any
'easy' way to do this and/or can I find out what files it has
installed where so I can remove them?

-- 
Chris Green


From hdante at gmail.com  Tue May  6 13:43:22 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 10:43:22 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <7d8db79a-1018-46e9-8474-684bea2ed993@2g2000hsn.googlegroups.com>

On May 6, 12:09?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> On May 6, 10:26?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-06, jmDesktop <needin4mat... at gmail.com> wrote:
>
> > > Studying OOP and noticed that Python does not have Interfaces. ?Is
> > > that correct? ?Is my schooling for nought on these OOP concepts if I
>
> > Depends on your definition of 'Python does not have Interfaces'. They are not
> > in the official language, but they do exist. look into zope.interfaces, athttp://www.zope.org/Products/ZopeInterface.
>
> > > use Python. ?Am I losing something if I don't use the "typical" oop
> > > constructs found in other languages (Java, C# come to mind.) ?I'm
>
> > I think you are still thinking with a Java mind-set (no idea about C#, never
> > programmed with it).
>
> > Interfaces mainly exist to formalize TO A COMPILER that an object will provide
> > certain stuff. In this way, the compiler can catch such errors at compile time.
>
> > Python on the other hand does very little at compile time (other than parse
> > errors). Instead, at run-time it performs the checks that something you want to
> > use is actually there.
> > (in the same way that you don't declare variables a priori. You simply use them
> > and Python creates them for you when needed).
>
> > As a result, you get much more light-weight, more dynamic, code, which supports
> > the RAD nature of Python what makes it so much more productive.
>
> > (after a few years Python, you may find the Java way of doing things clunky).
>
> > > afraid that if I never use them I'll lose them and when I need them
> > > for something beside Python, I'll be lost. ?Thank you.
>
> > You can continue doing everything exactly in the way you do now. Effectively
> > you would then be programming Java/C# in Python syntax. I believe you would
> > gain very little by that move.
>
> > If you dare let go of your old habits, and embrace the mindset of a new
> > language, you can learn a lot more, namely that programming can be done in many
> > different ways (even if all those ways are called OOP).
> > If you only have a hammer, the whole world looks like a nail. If you have a
> > whole toolbox, problems become much more diverse (subtle). You learn to use
> > the right tools for the right problem, and maybe you find new (better) ways of
> > approaching old problems.
>
> > In the process, you may lose details of how something was done in language X,
> > but that's why they have invented books.
>
> > Sincerely,
> > Albert
>
> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too. ?On the dynamic typing,

 No. When teaching problem solving in the basic programming courses,
the language is irrelevant. You don't even need a computer for that.

> isn't that the same sort of thing that lots of scripting languages
> do? ?VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in
> Classic ASP.) ?I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why. ?Thanks.

 If you want to understand the design decisions behind python, read
its history:
 http://www.artima.com/intv/python.html

 Also, do you have an example of some problem that requires an
interface that you would like to know how it's done in python (or
maybe an explanation of why it's not possible) ?


From pavlovevidence at gmail.com  Sat May 17 01:25:50 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 22:25:50 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <1be510d2-c4ce-45ab-82d6-8135fdd268a6@m3g2000hsc.googlegroups.com>

On May 17, 12:01 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.
>
> I can't see any use-case of them that couldn't be re-written more clearly
> with methods of metaclass or plain functions.

I am probably one of the bigger advocates of metaclasses here, but
given a problem that could equally well be solved by the two I would
choose classmethods every time.  Classmethods are more
straightforward, easier to follow (especially by people who aren't
used to working with metaclasses), and they hinder reusability less.

Classmethods have practical advantages.  One thing you can do with a
classmethod that you can't directly do with a metaclass instancemethod
is to call it with an instance:

 Python 2.5 (r25:51908, Apr 19 2007, 15:29:43)
 [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
 Type "help", "copyright", "credits" or "license" for more
information.
 >>> class A(type):
 ...     def hello(self):
 ...             print "hello"
 ...
 >>> class B(object):
 ...     __metaclass__ = A
 ...     @classmethod
 ...     def world(self):
 ...             print "world"
 ...
 >>> b = B()
 >>> b.world()
 world
 >>> b.hello()
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 AttributeError: 'B' object has no attribute 'hello'

Though I can imagine some people would argue this is an advantage of
metaclasses.


> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place
> making your code a mess.
> 2. They are slower than metaclass methods or plain functions.
>
> I really want to hear your opinions on the subject.

I think neither of these reasons are very compelling.  I don't even
agree with the premise of #1, but even granting that it's messy to do
that, I disagree that the mess would outweigh the drawbacks in
complexity and reusability that a metaclass would bring.  As for #2, I
don't believe "class-level functionality" is often found in bottleneck
situations, so what does it matter what speed it is?


Carl Banks


From wojtek.gminick.walczak at gmail.com  Sun May  4 12:34:04 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Sun, 4 May 2008 18:34:04 +0200
Subject: Determine socket family at runtime
In-Reply-To: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
Message-ID: <2c3c21060805040934s10b6953dv31c46d6ff604e88b@mail.gmail.com>

2008/5/4, Giampaolo Rodola' <gnewsg at gmail.com>:
>  For now I've been able to determine the family by using:
>
>  # self.socket = a connected socket.socket instance
>  ip, port = self.socket.getsockname()[0:2]
>  af = socket.getaddrinfo(ip, port)[0][0]
>
>  ...but I'd like to know if some other solution is preferable.

Nope, there is none. Using getaddrinfo() to check address family
is the de facto standard.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:29:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:29:18 -0300
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
	<g0d1m4$ng9$1@ger.gmane.org>
Message-ID: <op.ua4pi4ihx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 18:37:10 -0300, Terry Reedy <tjreedy at udel.edu>  
escribi?:

> "Rajarshi" <rajarshi.guha at gmail.com> wrote in message
> news:bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com...
> | Hi, I teach an introductory programming course in Python. As part of
> | the introduction I'd like to highlight the usage of Python in
> | industry. The idea is to show that there are big players using Python
> | for a variety of tasks. Given that the students come from a variety of
> | backgrounds and are not necessarily 'hackers', I'm trying to look for
> | examples with a bit of wow-factor.
>
> Besides the other comments, there was a thread about a month ago that  
> give
> more python success stories (perhaps that was the title).

Yes, this was the thread:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/1bd91aca0c86c57c/

-- 
Gabriel Genellina



From lists at cheimes.de  Fri May  9 05:37:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 11:37:53 +0200
Subject: Free Memory
In-Reply-To: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
Message-ID: <g0161h$lc3$1@ger.gmane.org>

Dark Wind schrieb:
> Hi,
> 
> How can I free all the memory in python by deleting all variables. I am
> looking for the equivalent of 'clear' from Matlab.
> 
> I know del x deletes a variable x, but it doesn't free all the available
> memory.

del doesn't free an object. It only removes one reference to the object.

Christian



From bj_666 at gmx.net  Tue May 27 06:54:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 May 2008 10:54:05 GMT
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
Message-ID: <6a27idF32hqrpU3@mid.uni-berlin.de>

On Tue, 27 May 2008 03:01:30 -0700, Magnus.Moraberg wrote:

> I wish to extract all the words on a set of webpages and store them in
> a large dictionary. I then wish to procuce a list with the most common
> words for the language under consideration. So, my code below reads
> the page -
> 
> http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
> 
> a welsh language page. I hope to then establish the 1000 most commonly
> used words in Welsh. The problem I'm having is that
> soup.findAll(text=True) is returning the likes of -
> 
> u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
> www.w3.org/TR/REC-html40/loose.dtd"'

Just extract the text from the body of the document.

body_texts = soup.body(text=True)

> and -
> 
> <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
> 
> Any suggestions how I might overcome this problem?

Ask the BBC to produce HTML that's less buggy.  ;-)

http://validator.w3.org/ reports bugs like "'body' tag not allowed here"
or closing tags without opening ones and so on.

Ciao,
	Marc 'BlackJack' Rintsch


From jcd at sdf.lonestar.org  Sat May 24 19:25:46 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sat, 24 May 2008 19:25:46 -0400
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01"
	in python coding?
In-Reply-To: <e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
	<e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
Message-ID: <1211671546.21932.49.camel@jcd-desktop>

On Sat, 2008-05-24 at 15:59 -0700, zxo102 wrote:
> But this is not "\xED\x6F\x3C\x01".  I need it for
> struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
> (IEEE 754).
> Any other suggestions?
> 
> ouyang
> 

In fact it is exactly the same string.  The repr of a string always
substitutes ascii values for their numeric equivalent, but those bytes
are still the underlying representation of the string.

>>> [hex(ord(c)) for c in "\xefo<\x01"]
['0xef', '0x6f', '0x3c', '0x1']

Cheers,
Cliff

> On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > [ zxo102 <zxo... at gmail.com> ]
> >
> > >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > > "\xED\x6F\x3C\x01" in python coding?
> > > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > > the error information : invalid \x escape.
> >
> > [1]--> 'ED6F3C01'.decode('hex')
> > Out[1]: '\xedo<\x01'
> >
> > - --
> > Freedom is always the freedom of dissenters.
> >                                       (Rosa Luxemburg)
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v2.0.9 (GNU/Linux)
> >
> > iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> > YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> > =jxll
> > -----END PGP SIGNATURE-----
> 
> --
> http://mail.python.org/mailman/listinfo/python-list



From roy at panix.com  Wed May 21 13:38:18 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 13:38:18 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
	<roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>
	<3KadnXuJQ5VA0qnVRVnyuAA@pipex.net>
Message-ID: <roy-DFD67D.13381721052008@70-1-84-166.area1.spcsdns.net>

In article <3KadnXuJQ5VA0qnVRVnyuAA at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> infact there is no need for any IT phone calls, I am the owner of this 
> network

That's the best way to do it :-)


From davidj411 at gmail.com  Tue May 27 11:44:59 2008
From: davidj411 at gmail.com (davidj411)
Date: Tue, 27 May 2008 08:44:59 -0700 (PDT)
Subject: how to reply to posts on google groups (and not reply to just author)
Message-ID: <b8707517-a5f0-4ed9-ba1d-3a7bacb571f1@2g2000hsn.googlegroups.com>

I want to reply to the goups and not author for  an older post (from
February) , but it seems i can only reply to the author (using google
groups).

 Is there a way (within Google groups) to reply to an older post to
keep that particular thread going instead of posting a new one (as i
am here now doing - sorry about this being a non-python question.)


From lists at cheimes.de  Tue May  6 08:51:59 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 06 May 2008 14:51:59 +0200
Subject: select.poll() and WSAPoll
In-Reply-To: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
References: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
Message-ID: <4820546F.10805@cheimes.de>

inhahe schrieb:
> select.poll isn't supported on Windows, because Windows doesn't have such a 
> feature, or at least it didn't until Vista.  Vista implements the same thing 
> but called  WSAPoll, an article is here 
> http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
> I hope that the next edition of Python supports select.poll on Vista, or at 
> least that someone writes a third-party module fo it. As much as I'd love to 
> do it myself, it's probably beyond me.. i've never used poll before nor 
> written a Python extension.  also, i don't have Vista.

Python 2.6 and 3.0 doesn't have support for WSAPoll so far. I don't have
Vista on my dev box so I can't add WSAPoll as I've added epoll and
kqueue for 2.6.

I don't think we can officially support WPAPoll since Python 2.6 is
suppose to run on Windows 2000 and XP, too.

Christian



From zhalbrecht at gmail.com  Tue May 20 12:26:03 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 09:26:03 -0700 (PDT)
Subject: Accumulating values in dictionary
Message-ID: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>

Given a bunch of objects that all have a certain property, I'd like to
accumulate the totals of how many of the objects property is a certain
value. Here's a more intelligible example:

Users all have one favorite food. Let's create a dictionary of
favorite foods as the keys and how many people have that food as their
favorite as the value.

d = {}
for person in People:
    fav_food = person.fav_food
    if d.has_key(fav_food):
        d[fav_food] = d[fav_food] + 1
    else:
        d[fav_food] = 1

d ends up being something like: {'pie': 400, 'pizza': 200, 'burgers':
100} if 400 people like pie, 200 like pizza and 100 like burgers.

There's nothing wrong (that I know of) by doing it as I have up there,
but is there a simpler, easier way? Looking forward to hearing about
how much of a n00b I am. Thanks in advance!


From bernardet at cppm.in2p3.fr  Tue May  6 08:43:37 2008
From: bernardet at cppm.in2p3.fr (Karim Bernardet)
Date: Tue, 06 May 2008 14:43:37 +0200
Subject: get the pid of a process with pexpect
In-Reply-To: <a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
	<a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>
Message-ID: <fvpjs7$9nc$1@ccpntc8.in2p3.fr>

Many thanks !
This is what I did

for mytunnel.py :
I use pexpect like this
tunnel_command = '''bash -c "ssh -N -R 60011:localhost:60002 
username at xxxxx.fr "'''
....
com="echo \""+str(ssh_tunnel.pid)+"\" >> pids"
...
time.sleep(172800)

in the bash script which calls mytunnel.py :
./mytunnel.py ${USERN} ${HMM} ${P2USE} ${p2use2}  &
echo $! >>pids

this way I have all the pids

Cheers !


Noah wrote:
> On May 5, 7:18 am, Karim Bernardet <bernar... at cppm.in2p3.fr> wrote:
>> ssh_tunnel = pexpect.spawn (tunnel_command % globals())
>> ...
>> print ssh_tunnel.pid
>>
>> but ssh_tunnel is not the pid of the ssh tunnel
>>
>> Is there a way to get it using pexpect ?
> 
> You will notice that you can't get this information even from the
> shell. This does not work of course:
> 
>     ssh -f -N -L 81:localhost:80 noah at www.example.com
>     echo $!
> 
> However, this seems to work, but I don't trust it. Certainly it isn't
> a real daemon, but this work OK for you if you only need to manage the
> tunnel for the duration of your script. Notice that now Bash had the
> PID in $! variable:
> 
>     ssh -N -L 81:localhost:80 noah at www.example.com &
>     TUNNEL_PID=$!
>     echo $TUNNEL_PID
> 
> What command-line are you using for 'tunnel_command'? This is hard
> because SSH does not provide a way to get the PID of the tunnel if you
> request ssh to go to the background (see the -f option). I always
> considered this a bug because it makes scripting hard. Even if you
> start the tunnel from a shell you can't use $! to get the PID because
> the daemonizing is initiated by ssh. This is not the same use using
> the shell to put a command into the background, so the shell won't
> know anything about the PID.
> 
> I'm not sure if you can put ssh into the background using the shell
> and still have the tunnel work. So you might start a tunnel something
> like this:
> 
>     ssh -f -N -L 80:localhost:80 username at www.example.com
> 
> But can you also do something like this?
> 
>     ssh -N -L 80:localhost:80 username at www.example.com &
>     echo $!
> 
> And for that to even work you will have to use Pexpect to start bash.
> Remember, Python doesn't start your command in a subshell, so you have
> to specify it if you want. So your tunnel command would have to be
> something like this:
> 
>     tunnel_command = '''bash -c "ssh -N -L ...foo... &"'''
>     ssh_tunnel = pexpect.spawn (tunnel_command % globals())
> 
> --
> Noah



From gherron at islandtraining.com  Sun May  4 14:44:09 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 11:44:09 -0700
Subject: is +=1 thread safe
In-Reply-To: <035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>	<yfsod7mfcl0.fsf@gmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
Message-ID: <481E03F9.7050206@islandtraining.com>

Carl Banks wrote:
> On May 4, 12:03 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Alexander Schmolck wrote:
>>     
>>> Gary Herron <gher... at islandtraining.com> writes:
>>>       
>>>> But... It's not!
>>>>         
>>>> A simple test shows that.   I've attached a tiny test program that shows this
>>>> extremely clearly.  Please run it and watch it fail.
>>>>         
>>> In [7]: run ~/tmp/t.py
>>> final count: 2000000
>>>   should be: 2000000
>>>       
>>> (I took the liberty to correct your test to actually do what I said, namely
>>> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
>>> numpy.array(0)``).
>>>       
>> The test was meant to simulate the OP's problem, but even with your
>> suggestion of using numpy, it *still* fails!
>>     
>
>
> Ok, so numpy scalars don't support += atomically.  Thank you for your
> skepticism in discovering this.
>   

You're welcome.
> However, what I said was not wholly untrue: code in C extensions is
> protected by the GIL and thus not interruptable, unless it either
> releases the GIL, or calls back into Python code (which is apparently
> what numpy scalars do).
>   

Yikes.   Thanks for that.

However, the upshot of all of this is that one must maintain extreme 
skepticism.   Unless you know both your Python code and any extension 
modules you call, and you know them at a level necessary to find such 
details, you must conclude that any operation, no matter how atomic it 
my look, may in fact not be atomic. 

Gary Herron


> To illustrate, a small extension module is included below.  Just to
> make things interesting, I added a long busy loop in between reading
> and setting the counter, just to give the other thread maximum
> opportunity to cut in.
>
> If you were to compile it and run the test, you would find that it
> works perfectly.
>
>
> ===========================
> /* atomic.c */
>
> #include <Python.h>
> #include <structmember.h>
>
> typedef struct {
>     PyObject_HEAD
>     long value;
> } AtomicCounterObject;
>
> static int init(AtomicCounterObject* self, PyObject* args,
>                       PyObject* kwargs) {
>     self->value = 0;
>     return 0;
> }
>
> static PyObject* iadd(AtomicCounterObject* self, PyObject* inc) {
>     long incval = PyInt_AsLong(inc);
>     long store, i;
>     static int bigarray[100000];
>     if (incval == -1 && PyErr_Occurred()) return 0;
>
>     store = self->value;
>
>     /* Give the thread plenty of time to interrupt */
>     for (i = 0; i < 100000; i++) bigarray[i]++;
>
>     self->value = store + incval;
>
>     return (PyObject*)self;
> }
>
> static PyObject* toint(AtomicCounterObject* self) {
>     return PyInt_FromLong(self->value);
> }
>
> static PyNumberMethods ac_as_number = {
>     0,                             /*nb_add*/
>     0,                             /*nb_subtract*/
>     0,                             /*nb_multiply*/
>     0,                             /*nb_divide*/
>     0,                             /*nb_remainder*/
>     0,                             /*nb_divmod*/
>     0,                             /*nb_power*/
>     0,                             /*nb_negative*/
>     0,                             /*nb_positive*/
>     0,                             /*nb_absolute*/
>     0,                             /*nb_nonzero*/
>     0,                             /*nb_invert*/
>     0,                             /*nb_lshift*/
>     0,                             /*nb_rshift*/
>     0,                             /*nb_and*/
>     0,                             /*nb_xor*/
>     0,                             /*nb_or*/
>     0,                             /*nb_coerce*/
>     (unaryfunc)toint,              /*nb_int*/
>     0,                             /*nb_long*/
>     0,                             /*nb_float*/
>     0,                             /*nb_oct*/
>     0,                             /*nb_hex*/
>     (binaryfunc)iadd,              /*nb_inplace_add*/
>     0,                             /*nb_inplace_subtract*/
>     0,                             /*nb_inplace_multiply*/
>     0,                             /*nb_inplace_divide*/
>     0,                             /*nb_inplace_remainder*/
>     0,                             /*nb_inplace_power*/
>     0,                             /*nb_inplace_lshift*/
>     0,                             /*nb_inplace_rshift*/
>     0,                             /*nb_inplace_and*/
>     0,                             /*nb_inplace_xor*/
>     0,                             /*nb_inplace_or*/
>     0,                             /* nb_floor_divide */
>     0,                             /* nb_true_divide */
>     0,                             /* nb_inplace_floor_divide */
>     0,                             /* nb_inplace_true_divide */
>     0,                             /* nb_index */
> };
>
> static PyTypeObject AtomicCounterType = {
>     PyObject_HEAD_INIT(NULL)
>     0,                             /*ob_size*/
>     "AtomicCounter",               /*tp_name*/
>     sizeof(AtomicCounterObject),   /*tp_basicsize*/
>     0,                             /*tp_itemsize*/
>     0,                             /*tp_dealloc*/
>     0,                             /*tp_print*/
>     0,                             /*tp_getattr*/
>     0,                             /*tp_setattr*/
>     0,                             /*tp_compare*/
>     0,                             /*tp_repr*/
>     &ac_as_number,                 /*tp_as_number*/
>     0,                             /*tp_as_sequence*/
>     0,                             /*tp_as_mapping*/
>     0,                             /*tp_hash */
>     0,                             /*tp_call*/
>     0,                             /*tp_str*/
>     0,                             /*tp_getattro*/
>     0,                             /*tp_setattro*/
>     0,                             /*tp_as_buffer*/
>     Py_TPFLAGS_DEFAULT,            /*tp_flags*/
>     0,                             /*tp_doc */
>     0,                             /*tp_traverse*/
>     0,                             /*tp_clear*/
>     0,                             /*tp_richcompare*/
>     0,                             /*tp_weaklistoffset*/
>     0,                             /*tp_iter*/
>     0,                             /*tp_iternext*/
>     0,                             /*tp_methods*/
>     0,                             /*tp_members*/
>     0,                             /*tp_getset*/
>     0,                             /*tp_base*/
>     0,                             /*tp_dict*/
>     0,                             /*tp_descr_get*/
>     0,                             /*tp_descr_set*/
>     0,                             /*tp_dictoffset*/
>     (initproc)init,                /*tp_init*/
>     0,
>     PyType_GenericNew,
> };
>
>
> static PyMethodDef methods[] = {
>     {0} /* sentinel */
> };
>
>
> PyMODINIT_FUNC initatomic(void) {
>     PyObject* m;
>     if (PyType_Ready(&AtomicCounterType) < 0)
>         return;
>     m = Py_InitModule("atomic", methods);
>     if (m == NULL)
>         return;
>     Py_INCREF(&AtomicCounterType);
>     PyModule_AddObject(m, "AtomicCounter", (PyObject
> *)&AtomicCounterType);
> }
>
> ========================
> # actest.py
>
> import threading
>
> N = 200000
> import atomic; count = atomic.AtomicCounter()
>
> class timer(threading.Thread):
>     def run(self):
>         global count
>         for i in xrange(N):
>             count += 1
>
> def test():
>     thread1=timer()
>     thread2=timer()
>     thread1.start()
>     thread2.start()
>     thread1.join()
>     thread2.join()
>     print 'final count:', count
>     print '  should be:', 2*N
>
> if __name__=='__main__':
>     test()
> ========================
>
>
> Carl Banks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From arnodel at googlemail.com  Mon May 12 12:53:27 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 17:53:27 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
	<pecora-93F856.11501912052008@ra.nrl.navy.mil>
Message-ID: <m2od7b31mg.fsf@googlemail.com>

Lou Pecora <pecora at anvil.nrl.navy.mil> writes:

> In article <mailman.962.1210572565.12834.python-list at python.org>,
>  "Terry Reedy" <tjreedy at udel.edu> wrote:
>
>> "Mark Dickinson" <dickinsm at gmail.com> wrote in message 
>> news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
>> On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
>> |> Do you have in mind any situations in which it is advantageous to have 
>> 0**0
>> |> undefined?
>> 
>> | (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
>> 
>> Which, of course, I was not, but for the sake of discussion....
>> 
>> | then it's not at all clear that 0.**0. should be considered well-defined.
>> 
>> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
>> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
>> defined whether y is 0 or not, even though there is a discontinuity in the 
>> limit.
>
> Huh?  That "discontinuity" is the problem.  Actually, the problem is 
> that the function f(x,y)=x**y=exp(y*ln(x)) will be double valued at x=0 
> and y=0.  

Actually f(x, y) can take any positive value, depending on how x and y
tend to 0.  Say for example

    x = exp(-k/y), k being a positive constant.

Then as y -> 0+, so does x and y*ln(x) = y * (-k/y) = -k

Therefore f(x, y) = exp(-k) and as y -> 0,

    x -> 0

    f(x, y) -> exp(-k)


> It's value will depend on the direction in which the limit
> approaches (x,y)=(0,0).  You cannot have a function that has two
> values at one domain point without adding branch cuts (see complex
> functions like ln(z), z is complex).  

This is unrelated, z -> ln(z) is a holomorphic function, locally
defined everywhere but at 0, therefore it can be defined on any simply
connected subset of the complex numbers not containing 0.

OTOH, f(x,y) as you defined it above is a real analytic function.
AFAIK, it doesn't have the above property.

-- 
Arnaud


From dave_140390 at hotmail.com  Wed May 28 05:08:17 2008
From: dave_140390 at hotmail.com (dave_140390 at hotmail.com)
Date: Wed, 28 May 2008 02:08:17 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
Message-ID: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>

Hi,

I have problems getting my Python code to work with UTF-8 encoding
when reading from stdin / writing to stdout.

Say I have a file, utf8_input, that contains a single character, ?,
coded as UTF-8:

	$ hexdump -C utf8_input
	00000000  c3 a9
	00000002

If I read this file by opening it in this Python script:

	$ cat utf8_from_file.py
	import codecs
	file = codecs.open('utf8_input', encoding='utf-8')
	data = file.read()
	print "length of data =", len(data)

everything goes well:

	$ python utf8_from_file.py
	length of data = 1

The contents of utf8_input is one character coded as two bytes, so
UTF-8 decoding is working here.

Now, I would like to do the same with standard input. Of course, this:

	$ cat utf8_from_stdin.py
	import sys
	data = sys.stdin.read()
	print "length of data =", len(data)

does not work:

	$ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
	length of data = 2

Here, the contents of utf8_input is not interpreted as UTF-8, so
Python believes there are two separate characters.

The question, then:
How could one get utf8_from_stdin.py to work properly with UTF-8?
(And same question for stdout.)

I googled around, and found rather complex stuff (see, for example,
http://blog.ianbicking.org/illusive-setdefaultencoding.html), but even
that didn't work: I still get "length of data = 2" even after
successively calling sys.setdefaultencoding('utf-8').

-- dave


From mensanator at aol.com  Mon May  5 15:22:07 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 5 May 2008 12:22:07 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <6bea0cba-7375-40ba-8e39-451f6c0c8ce3@c58g2000hsc.googlegroups.com>

On May 5, 1:43?pm, notbob <not... at nothome.com> wrote:
> On 2008-05-04, notbob <not... at nothome.com> wrote:
>
> > I'm trying to learn how to program. ?I'm using:
>
> > How to Think Like a Computer Scientist
>
> > Learning with Python
> > 2nd Edition
>
> http://openbookproject.net//thinkCSpy/index.xhtml
>
> OK then, using the above, I get everything up till chap 3 and functions and
> then it all falls apart. ?I try using his code and nothing. ?I'm running
> vers 2.5.1 on slackware 12. ?Here's what I don't get:
>
> ----------
>
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
> ? ? print bruce, bruce
>
> This function takes a single argument and assigns it to the parameter named
> bruce. ?The value of the parameter (at this point we have no idea what it
> will be) is printed twice, followed by a newline. ?The name bruce was chosen
> to suggest that the name you give a parameter is up to you, but in general,
> you want to choose something more illustrative than bruce.
>
> ****ME****
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet? ?

Well, it prints whatever bruce is.

> I read another newb explanation here:http://www.codepedia.com/1/BeginnersGuideToPython_Functions
> ...and it doesn't work, either. ?I define myfirstfunction in the pyth editor
> and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

Looks like you didn't call it right. Even though myfirstfunction
doesn't
take any parameters, you still have to use parentheses. You must
invoke
it by myfirstfunction(). Without the parenthese, you're just printing
the
location of the function. This allows functions to call functions, so
that
you can take a list and apply myfirstfunction to every item in the
list
even though myfirstfunction was designed to process only a  single
item.

> ....when I add the ._doc_, it get this:
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> AttributeError: 'function' object has no attribute '_doc_'
> ....so, there is a no go there, too.

Should be TWO underscores, '.__doc__', not '._doc_'.
Such doc strings can be very useful.

For example:
>>> import collatz_functions
>>> help(collatz_functions.collatz)
Help on function collatz in module collatz_functions:

collatz(a, p)
    3x+1 sequencer, no loop detection

    collatz(a,p)
    a: starting value
    p: print options (binary)
       bit 0 print even numbers (turns off power division)
       bit 1 print  odd numbers
       bit 2 print debug (if any)
    returns: CollatzSequenceParameters [R1count, R2count]

Notice collatz() takes two arguments, but I left off the
parentheses and arguments when using the help() function.
That's an example of using the function location.

> ****ME****
>
> The interactive Python shell provides us with a convenient way to test
> our functions. ?We can use the import statement to bring the functions
> we have defined in a script into the interpreter session. ?To see how this
> works, assume the print_twice function is defined in a script
> named chap03.py. ?We can now test it interactively by
> importing it into our Python shell session:
>
> ****ME****
> ok, I try and follow the above, but where is he getting the script? ?So, I
> make a script called chap03.py and put it in ~/pyth/chap03/. ?

Actually, I'm not sure where you should put it. I put mine in
the Lib directory.

> ****ME****
>
> >>> from chap03 import *
> >>> print_twice('Spam')
> Spam Spam
> >>> print_twice(5)
> 5 5
> >>> print_twice(3.14159)
>
> 3.14159 3.14159
>
> ****ME****
> I then try an do the import thing above, but the pyth ed accepts none of it.
> not from:
> from ~/pyth/chap03/ import * ? ? ?
> from chap03 import * ? ? ? ? ? ?#taken from ~/pyth/
> ....nor from any other configuration I can imagine, so that "from" command
> makes no sense. ?

You use "from" to specify what parts of the module to
import, not specify where the module is located. For instance, I
could have said above

from collatz_functions import collatz

and just that function would have been loaded and I could call
it directly, collatz(x,y) instead of collatz_functions.collatz(x,y).

> ****ME****
>
> In a function call, the value of the argument is assigned to the
> corresponding parameter in the function definition. ?In effect, it is if
> bruce = 'Spam' is executed when print_twice('Spam')
> is called, bruce = 5 in print_twice(5), and
> bruce = 3.14159 in print_twice(3.14159)."
>
> ****ME****
> OK, I'm totally lost. ?Neither the above or the other link works or make any
> sense at all. ?Is the above print_twice(5), etc, supposed to work like the
> original print_twice(bruce) function (which still doesn't!), just with a
> different parameter? ?

Yes, once you define print_twice(bruce), you have to call it with
something.

print_twice(5)       prints 5 5
print_twice('fred')  prints fred fred
print_twice(bruce)   is an error if you haven't defined a variable
named bruce

> Call me stupid, but I'd sure like to get past this.
> How am I supposed to get the original def to work? ?I've yet to figure out
> how to get plain ol':
> bruce bruce
> Yes, I've indented 4 spaces where I should.

You have to use parentheses and enclose some legal entity when you
call it.
?
> ****ME****
>
> ----------
>
> I feel dumber'n a bag 0' hammers and in need of clarification.
>
> Thank you
> nb



From gnewsg at gmail.com  Fri May  2 15:15:45 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 12:15:45 -0700 (PDT)
Subject: IPv6 and Python
Message-ID: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>

I'm not sure if this is a question about python programming, system
administration or sockets in general...
I have the FTP server in my signature to which I'd want to add IPv6
support.
My hosting company provides me a common IPv4 address.
I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
really matter) to temporarily use IPv6 for trying to add such feature
to my library (I work on both Windows XP and Linux).
Could someone point me to some resources describing how could I do
that?


Thanks in advance.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From bruno.desthuilliers at gmail.com  Wed May 14 17:50:22 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:50:22 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
Message-ID: <c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>

On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> >> __new__ is a static method!
>
> > __new__ is a special-cased staticmethod that  1/ must not be declared
> > as such and 2/ takes the class object as first args. As far as I'm
> > concerned, it's semantically a classmethod.
>
> It's a static method!

Sorry Arnaud, I probably didn't made it clear enough : I do know it is
a staticmethod object. What I say is that
1/ it's special-cased since you don't *explicitely* declare it as a
staticmethod
2/ it behaves just like a classmethod, since it takes the class as
first argument.

IOW, I'm talking about semantic, not implementation.

> --
> Arnaud



From jjb5 at cornell.edu  Wed May  7 17:03:10 2008
From: jjb5 at cornell.edu (Joel Bender)
Date: Wed, 07 May 2008 17:03:10 -0400
Subject: howto print binary number
In-Reply-To: <482214BE.4040702@islandtraining.com>
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
	<482214BE.4040702@islandtraining.com>
Message-ID: <4822190E.2030806@cornell.edu>

> Python 3.0 has such a formatting operation, but Python 2.x does not.  
> However it's not hard to write.

Indeed.  Refraining from using named lambdas:

     >>> def bin(x):
     ...     return ''.join(x & (1 << i) and '1' or '0' for i in
     ...         range(7,-1,-1))
     ...
     >>> bin(12)
     '00001100'
     >>> bin(63)
     '00111111'

It would be nice to have str(x, 2) like int(x, 2), but there are bigger 
fish in pond.


Joel


From mdw at distorted.org.uk  Wed May 14 09:28:22 2008
From: mdw at distorted.org.uk (Mark Wooding)
Date: Wed, 14 May 2008 13:28:22 +0000 (UTC)
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
	<m2d4nqar3w.fsf@googlemail.com>
Message-ID: <slrng2lq7m.ihm.mdw@metalzone.distorted.org.uk>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> AFAIK, Python has lexical scoping, with the restriction that
> non-global non-local names cannot be rebound.

I believe so.

It's possible to implement (shallow) dynamic binding as a Python context
manager, though it involves a little unpleasantness with sys._getframe
to get hold of the caller's variables.  See

  http://www.distorted.org.uk/~mdw/hacks/fluid.py

That Python can do this (and fairly simply) speaks well of its
flexibility and dynamic nature.

I don't know how to make it work properly with multi-threading,
unfortunately.

-- [mdw]


From george.sakkis at gmail.com  Fri May  2 16:09:29 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 13:09:29 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <858f0130-2d19-4429-8f80-346aa5cc7c9f@r66g2000hsg.googlegroups.com>

On May 2, 3:04 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>
>
>
> > TkNeo wrote:
> > > WHAT ?
>
> > > This is crazy
>
> > Crazy like a fox?
>
> > a = [1, 2, 3]
> > try:
> >      a.index(99)
> > except:
> >      a.append(99)
> > finally:
> >      print a.index(99)
>
> > MY question: which exception should I actually be catching there?
> > ** Posted fromhttp://www.teranews.com**
>
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.

Please refrain from making such inane comments after an hour or two of
toying with a new language. Read a good tutorial first (e.g.
http://diveintopython.org/toc/index.html) and come back if you have a
real question.

George


From notnorwegian at yahoo.se  Mon May 26 15:56:17 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 12:56:17 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
Message-ID: <7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>

guess what im after is:


> max = len (seq);
> for (int i = 0; i < max; ++i) {
>     do something with seq[i];
>
> }

>
> for item in seq:
>    do something with item

is the first example here a layer between machine and the second
example?

is it machine -> low-level -> highlevel
or is it machine -> highlevel

?


From longorh at npt.nuwc.navy.mil  Thu May  1 13:55:57 2008
From: longorh at npt.nuwc.navy.mil (ron.longo)
Date: Thu, 1 May 2008 10:55:57 -0700 (PDT)
Subject: Python application distribution
Message-ID: <16993351.post@talk.nabble.com>


I haven't figured out a way to do this but see no reason why it cannot be
done.  I have a decent size application written in 100% Python.  I would
like to distribute this application, but only the .pyc files.  Since the
.pyc's are just the compiled sources I figured it would work, but if I copy
just the pyc's and my main app's py into a directory by themselves, I'm
unable to execute.  Why is this?  At this point I'm not really keen on
handing out the source files to my application, it feels unprofessional.

Thanks,
Ron
-- 
View this message in context: http://www.nabble.com/Python-application-distribution-tp16993351p16993351.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From pecora at anvil.nrl.navy.mil  Mon May 12 11:50:19 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 12 May 2008 11:50:19 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
Message-ID: <pecora-93F856.11501912052008@ra.nrl.navy.mil>

In article <mailman.962.1210572565.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Mark Dickinson" <dickinsm at gmail.com> wrote in message 
> news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
> On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> |> Do you have in mind any situations in which it is advantageous to have 
> 0**0
> |> undefined?
> 
> | (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
> 
> Which, of course, I was not, but for the sake of discussion....
> 
> | then it's not at all clear that 0.**0. should be considered well-defined.
> 
> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
> defined whether y is 0 or not, even though there is a discontinuity in the 
> limit.

Huh?  That "discontinuity" is the problem.  Actually, the problem is 
that the function f(x,y)=x**y=exp(y*ln(x)) will be double valued at x=0 
and y=0.  It's value will depend on the direction in which the limit 
approaches (x,y)=(0,0).  You cannot have a function that has two values 
at one domain point without adding branch cuts (see complex functions 
like ln(z), z is complex).  That's not well defined -- in your sense.  
You are choosing a branch cut and you must make sure the rest of your 
math and code are consistent with that.  You should also tell any users 
of your code about that decision.

-- 
-- Lou Pecora


From mh at pixar.com  Tue May 27 03:57:34 2008
From: mh at pixar.com (mh at pixar.com)
Date: Tue, 27 May 2008 07:57:34 GMT
Subject: announce: OraPIG (python wrappers for Oracle)
Message-ID: <O9P_j.2663$xZ.1509@nlpi070.nbdc.sbc.com>

I'm pleased to announce the initial release of OraPIG,
the Oracle Python Interface Generator.

OraPIG generates Python wrapper classes for Oracle packages.

If you use Oracle and Python, this might be a pretty useful
package for you.  Download it and let us know what
you think!

Cheers,
Mark

Download and docs: http://code.google.com/p/orapig

----------------

Quick Example:  Suppose you have a package called tiny
with a single procedure p:

     create or replace package tiny
     as
         procedure p(x in number);
     end tiny;

OraPIG will generate a wrapper class that will allow you to
use the package without having to use the various database
calls. Instead, the wrapper class will be instantiated and
called just like any other Python class:

     class Tiny:
         def __init__(self,curs):  # instantiate class with a cursor
             ...
         def p(self,x):            # call procedure p(x)
             ...

Here's how it's used:

     import cx_Oracle
     import tiny
     conn = cx_Oracle.connect('scott/tiger')
     curs = conn.cursor()

     mytiny = tiny.Tiny(curs)
     mytiny.p(2)           # call a procedure
     curs.commit()         # not done automatically

-- 
Mark Harrison
Pixar Animation Studios


From dullrich at sprynet.com  Sun May 18 10:20:24 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 18 May 2008 09:20:24 -0500
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <i3e034l3n6bvt8g0lbk8bvekatqu49r69c@4ax.com>

On Sat, 17 May 2008 15:32:29 -0700 (PDT), Vicent Giner
<vginer at gmail.com> wrote:

>Hello.
>
>I am new to Python. It seems a very interesting language to me. Its
>simplicity is very attractive.
>
>However, it is usually said that Python is not a compiled but
>interpreted programming language ?I mean, it is not like C, in that
>sense.
>
>I am working on my PhD Thesis, which is about Operations Research,
>heuristic algorithms, etc., and I am considering the possibility of
>programming all my algorithms in Python.

Other people have said things about how to use Python
effieiently. Something that seems relevant that I don't
see mentioned:

Are you going to be doing research _about_ the
algorithms in question or is it going to be research
_using_ these algorithms to draw conclusions
about other things?

Most of the replies seem to be assuming the latter.
If it's the former then Python seems like definitely
an excellent choice - when you have want to try
something new it will be much faster trying it
out in Python, when you write up the results
there will be no need for pseudo-code as a
guide to the real code because the Python
will be just about as easy to read as the
pseudo code would be, etc.

>The usual alternative is C, but I like Python more.
>
>The main drawbacks I see to using Python are these:
>
>* As far as I understand, the fact that Python is not a compiled
>language makes it slower than C, when performing huge amounts of
>computations within an algorithm or program.
>
>* I don't know how likely it is to find libraries in Python related to
>my research field.
>
>* I know Python is a "serious" and mature programming language, of
>course. But I do not know if it is seen as "just funny" in a research
>context. Is Python considered as a good programming language for
>implementing Operations Research algorithms, such as heuristics and
>other soft-computing algorithms?
>
>Maybe this is not the right forum, but maybe you can give me some
>hints or tips...
>
>Thank you in advance.

David C. Ullrich


From p at ulmcnett.com  Wed May 14 14:42:27 2008
From: p at ulmcnett.com (Paul McNett)
Date: Wed, 14 May 2008 11:42:27 -0700
Subject: readlines with line number support?
In-Reply-To: <g0farj$70d$1@registered.motzarella.org>
References: <g0farj$70d$1@registered.motzarella.org>
Message-ID: <482B3293.1080508@ulmcnett.com>

Nikhil wrote:
> I am reading a file with readlines method of the filepointer object 
> returned by the open function. Along with reading the lines, I also need 
> to know which line number of the file is read in the loop everytime.
> I am sure, the line should have the property/attribute which will say 
> the line number of the file.
> 
> If there is none, do I have to end up using the counter in the loop?
> 
> fp = open("file", "r")
> lineno = 0
> for line in fp.readlines():
>     print "line number: " + lineno + ": " + line.rstrip()
>         lineno = lineno + 1

Untested:

for lineno, line in enumerate(open("file")):
   print "line number: %s : %s" % (idx, line.rstrip())

Note the other stylistic changes, too.


HTH.
Paul


From littlesweetmelon at gmail.com  Fri May 16 06:09:29 2008
From: littlesweetmelon at gmail.com (=?GB2312?B?zPC5zw==?=)
Date: Fri, 16 May 2008 18:09:29 +0800
Subject: Instance of class "object"
In-Reply-To: <8763tea9sd.fsf@mulj.homelinux.net>
References: <mailman.1214.1210927611.12834.python-list@python.org>
	<8763tea9sd.fsf@mulj.homelinux.net>
Message-ID: <cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>

2008/5/16 Hrvoje Niksic <hniksic at xemacs.org>:
> "??" <littlesweetmelon at gmail.com> writes:
>
>> Howdy,
>>     I wonder why below does not work.
>>
>> a = object()
>> a.b = 1        # dynamic bind attribute failed...
>
> Because the default object class doesn't have a dict or other
> indication of state.  It's a "pure" Python object whose only visible
> properties are its type and its identity.  (On the implementation
> level it also has a refcount.)
>
> This is necessary because all other Python objects (both new-style
> classes and C extensions) inherit from 'object', on the C level.
> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.
>
> Subclassing object instructs Python as to what kind of state you want
> your class to have.  The default is to have a dict to store
> properties:
>
> # a class with dict -- any property goes through dict, and creating a
> # Foo object actually creates two objects, one Foo and one dict
> class Foo(object):
>    pass
>
> But you can also specify:
>
> # an efficient 'Pair' class holding two objects
> class Pair(object):
>    __slots__ = 'first', 'second'
>
> Instances of Pair take up even less room that 2-element tuples
> because they don't carry the size information in the object.
>
> Now, if the object class carried a dict with it, it would be
> impossible to create a class like 'Pair'.
>
Really interesting. When the tuple ('first', 'second') is assigning to
__slot__, a special operation is done which makes __slot__ pointing
to a magic structure rather than a normal tuple. Am I right?


>> To make it correct, we have to create a new class:
>> class MyClass(object): pass
>> a = MyClass()
>> a.b = 1       # OK
>>
>> Does this strange behavior break the LSP (Liskov substitution
>> principle)?
>
> It follows from LSP that what the subclass may not introduce new
> preconditions.  In this case the subclass accepts a case that the
> original class didn't, so it doesn't introduce a new precondition, it
> simply weakens (removes) an existing one.

Indeed.

Thank you very much.

--
ShenLei

From ptmcg at austin.rr.com  Mon May 19 09:09:06 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:09:06 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <67828af6-82a6-4c5d-adc0-d5f8d4b083b0@x41g2000hsb.googlegroups.com>

On May 19, 4:54?am, kuratk... at kuratkull.com wrote:
> Hello,
>
<snip code example scraping a QOTD from www.mcgyver.com>
>
> print out
> **************

Since you have no control over spacing and line breaks in the input,
you can reformat using the textwrap module.  First replace all "\n"s
with " ", then use re.sub to replace multiple spaces with a single
space, then call textwrap.fill to reformat the line into lines up to
'n' characters long (I chose 50 in the sample below, but you can
choose any line length you like).

out = match.findall(html)
out = out[0].replace("\n"," ")
out = re.sub("\s+"," ",out)

print textwrap.fill(out,50)


-- Paul


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:48:46 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:48:46 +0200
Subject: Browser + local Python-based web server vs. wxPython
In-Reply-To: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
References: <mailman.588.1209997391.12834.python-list@python.org>
	<bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
Message-ID: <48200d59$0$23038$426a74cc@news.free.fr>

Mike Driscoll a ?crit :
(snip)
> The most popular Python web frameworks seem to be TurboGears, Django,
> Pylons, CherryPy and mod_python.

I wouldn't call mod_python a web framework. It's a library that exposes 
(most of) Apache's request handling process to Python, and is mostly 
used as a deployment solution.

> I know you can run TurboGears, Django and CherryPy locally as well as
> with Apache, so they might garner more of your attention.

Idem for Pylons (and FWIW, Turbogears 2 will be based on Pylons).

<OP>
My own personal preference goes to Pylons, but so far Django is way more 
stable and better documented.



From mail at timgolden.me.uk  Sun May  4 04:57:35 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 04 May 2008 09:57:35 +0100
Subject: Encoding Text
In-Reply-To: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>
References: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>
Message-ID: <481D7A7F.60903@timgolden.me.uk>

Paul Jefferson wrote:
> I'm learning this and I'm making a program which takes RSS feeds and 
> processes them and then outputs them to a HTML file.
> The problem I have is that some of the RSS feeds contain chachters which 
> I think are outside of the ascii range as when I attempt to write the 
> file containing themI get the follwoign error:

> File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 201, in 
> <module>
>     runner(1,"save.ahc")
>   File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 185, in 
> runner
>     h.write(html[countera])
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in 
> position 1147: ordinal not in range(128)

> For the life of me I can't figure out what I should do to stop this - I 
> tried to change the html by doing a html[countera] = 
> unicode(html[countera]) but it didn't seem to chaneg anything.

I assume from the traceback that html[countera] contains a unicode
object and that h is a regular file open for writing. If that's the
case then you need to do one of two things to have the string written
correctly: either open/wrap the file via the codecs module to specify
the encoding through which unicode objects should be written; or
explicitly encode the unicode objects as they're written.

If you don't do one of those two things then Python will try to
convert your unicode object naively so that it can be written to
file, and it will use the ascii codec which can't handle anything
outside the basic stuff. You've got a right-quote mark in your
unicode, probably from a Windows program.

Since the latter is easier to demonstrate from the code above:

<code snippet>
h.write (html[countera].encode ("utf8"))
</code snippet>

but a more general-purpose solution is probably:

<code snippet>
import codecs

h = codecs.open ("save.ahc", "w", encoding="utf8")
.
.
h.write (html[countera])
</code snippet>

TJG


From http  Wed May  7 17:50:41 2008
From: http (Paul Rubin)
Date: 07 May 2008 14:50:41 -0700
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <7xmyn1lr66.fsf@ruckus.brouhaha.com>

umpsumps at gmail.com writes:
> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res

Note: all code below is untested and may have errors ;-)

I think the above is misnamed because it doesn't actually sort.
Anyway, you could write it as a list comprehension:

    def valsort(d):
       return [(value, key) for (key, value) in d]


> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1

I would write that with the defaultdict module:

    from collections import defaultdict
    def mostfreq(strng):
       dic = defaultdict(int)
       for letter in strng:
           dic[letter] += 1

Alternatively with regular dicts, you could say:

    def mostfreq(strng):
       dic = {}
       for letter in strng:
           dic[letter] = dic.get(letter, 0) + 1

> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]

Someone else suggested the heapq module, which is a good approach
though it might be considered a little bit high-tech.  If you
want to use sorting (conceptually simpler), you could use the
sorted function instead of the in-place sorting function:

      # return the second element of a 2-tuple.  Note how we
      # use tuple unpacking: this is really a function of one argument
      # (the tuple) but we specify the arg as (a,b) so the tuple
      # is automatically unpacked on entry to the function.
      # this is a limited form of the "pattern matching" found in
      # languages like ML.
      def snd((a,b)): return b

      return sorted(dic.iteritems, key=snd, reverse=True)[-3:]


From tgrav at mac.com  Thu May 22 13:52:37 2008
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 22 May 2008 13:52:37 -0400
Subject: import X vs from x import *
In-Reply-To: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <A69FA821-499C-4EF2-B14B-382631A1EFA2@mac.com>


On May 22, 2008, at 1:44 PM, notnorwegian at yahoo.se wrote:

> import Tkinter

With this you call functions from Tkinter as

Tkinter.function()

> from Tkinter import *

Here you just call

function()

>
> i have a program where if i comment out either of those import-
> statements i get an error.
>
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.

The first creates the Tkinter namespace and all of its functions remain
in that namespace. The latter all functions are imported into the local
namespace.

Cheers
   Tommy (actually norwegian)


From kj7ny at nakore.com  Thu May  8 14:30:37 2008
From: kj7ny at nakore.com (kj7ny)
Date: Thu, 8 May 2008 11:30:37 -0700 (PDT)
Subject: Pamie Sample Code
Message-ID: <bd685ce6-20cc-40f8-9076-a50c49231620@h1g2000prh.googlegroups.com>

Does anyone know the where abouts of some good sample PAMIE code?

Thanks,


From tjreedy at udel.edu  Thu May  8 00:40:27 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 00:40:27 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <fvu07p$1gi$1@ger.gmane.org>


<andrej.panjkov at climatechange.qld.gov.au> wrote in message 
news:b2b7ff0b-922e-4ecf-9d04-50ce22243624 at a9g2000prl.googlegroups.com...

| On May 8, 7:38 am, globalrev <skanem... at yahoo.se> wrote:
| I would describe a lambda as a parameterised function template. If you
| dig, the docs call lambdas anonymous functions not bound to a name.

A lambda expression is an abbreviation of a simple def statement:
f = lambda args: expression
def f(args): return expression
have exactly the same effect except that f.func_name will be the less 
useful '<lambda>' instead of the more useful 'f'.

| There is a bit of resemblance to C macros.

Macros in C (and, I believe, some places elsewhere) are text-replacement 
templates.  They are markedly different from function statements.  C macros 
do not create C functions.  Python lambda expression do create Python 
function objects.  Since C macros are statements, not expressions, and are 
introduced by #define, similar to def, one could argue than Python def 
statements are more similar to C macros.

| Here is a simple lambda that implements an exclusive or:
|
| >>> def XOR(x,y) :
| >>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) )

def XORY(x,y):
   def _xory(): x and not y or not x and y
   return _xory

has the same effect.  Because lambda expressions define functions, not 
macros, there is no need for the protective parentheses that macros need.

 Here is another simple lambda, (template) to set up three new
| functions AddOnly, DeleteOnly, and ReplaceOnly.
|
| #--# Lambda function to check that a flag is only on when the other
| two are off. #--#
| def TFF(x,y,z) :
|  return lambda : ( ( x ) and not ( y ) and not ( z ) )

def TFF(x,y,z):
   def _tff(x,y,z): return ( ( x ) and not ( y ) and not ( z ) )
   return _tff

Same result (except for a real name in tracebacks), same usage.

| >>> import math
| >>> def Gaussian( mu, sigma ) :
| ...   return lambda x : math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
| math.sqrt (2 * math.pi *sigma **2 )

def Gaussian(mu, sigma):
   def _gaussian(x): return math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
      math.sqrt (2 * math.pi *sigma **2 )
   return _gaussian

Again, giving the returned function a name will help a bit if it raises an 
exception, which is definitely possible here.

Lambda expressions are an occasional convienience, not a requirement. 
Anyone who is confused by what they do should use an equivalent def 
instead.

Terry Jan Reedy





From torriem at gmail.com  Thu May 15 12:09:07 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 15 May 2008 10:09:07 -0600
Subject: HASH TABLES IN PYTHON
In-Reply-To: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
Message-ID: <482C6023.3090302@gmail.com>

Blubaugh, David A. wrote:
> I was wondering if anyone has ever worked with hash tables within the
> Python Programming language?  I will need to utilize this ability for
> quick numerical calculations.  

Dictionaries are, by definition, hash tables with a very optimized
algorithm to minimize collisions.



From floris.bruynooghe at gmail.com  Tue May 20 08:43:48 2008
From: floris.bruynooghe at gmail.com (Floris Bruynooghe)
Date: Tue, 20 May 2008 05:43:48 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <c03ff26d-33d4-4891-8b19-6b7b6da99455@e53g2000hsa.googlegroups.com>

On May 19, 4:18?pm, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers
> and get the dump into a file. Please let me know if it is feasible and
> the best way to achieve this.

There's no way I'd think about doing this in python.  The best tool
for the task is just shell IMHO:

flub at signy:~$ ssh mercury show access-lists
Welcome to mercury
root at mercury's password:

Standard IP access list 1
    10 permit any (265350 matches)
Standard IP access list 23
    10 permit 192.168.2.0, wildcard bits 0.0.0.255 (2 matches)
Extended IP access list 100
    10 deny ip any 192.168.0.0 0.0.255.255 log-input (8576 matches)
    20 permit ip any any (743438 matches)Connection to mercury closed
by remote host.
flub at signy:~$

You could plug in expect to solve the password thing.  Search for "ssh
expect" for that (and ignore suggestions about public keys, I haven't
found yet how to use those on cisco).


From DrColombes at yahoo.com  Thu May  8 22:00:31 2008
From: DrColombes at yahoo.com (Dr. Colombes)
Date: Thu, 8 May 2008 19:00:31 -0700 (PDT)
Subject: ASCII character logger program in Python?  (Or how to modify 
	EVDEV.py)
Message-ID: <7342596e-dcbc-4853-818e-4d75101b7f12@c19g2000prf.googlegroups.com>

   I've used a very nice Keystroke Logger Python shareware program
(EVDEV.py), written by Micah Dowty.

  But I couldn't find a dedicated ASCII Character Logger program.

  Does anyone know of an ASCII Character Logger program (preferably
Python)?

  Or how  to modify EVDEV.py to log ASCII characters transmitted by
keystrokes?  For example, how to "upper case" keystrokes between a
SHIFT PRESS and SHIFT RELEASE keystroke event pair?  Or "upper casing"
keystrokes between a pair of CAPS LOCK PRESS keystroke events.

  (I don't fully understand the object-oriented keystroke event code
in EVDEV.py., for example, how  to distinguish a PRESS event from a
RELEASE event.)

  Thanks for any suggestions, help you can offer.



From timothywayne.cook at gmail.com  Wed May 21 13:28:56 2008
From: timothywayne.cook at gmail.com (Tim Cook)
Date: Wed, 21 May 2008 14:28:56 -0300
Subject: Python/ZCA Healthcare Project Announcement
Message-ID: <1211390936.3127.166.camel@localhost.localdomain>

Hi All,

I apologize for the length of and the cross posting of this announcement
in advance but I believe it will be of value to you if you have ANY
interest in the healthcare IT field.  Even if you do not have interest
now; you may well after you realize the staggering growth that is
occurring in this sector.

The healthcare sector is a very complex information management space.
Healthcare IT applications are notorious for their lack of real
interoperability.  This of course increases the overall healthcare costs
due to lost and/or missing information.  

While the rate of adoption of IT in direct patient care scenarios has
been slow in the past; it is expected to increase dramatically over the
next few years.  A recent study shows that there will be a demand for an
additional 40,000+ healthcare information technology workers IN THE US
alone: http://medir.ohsu.edu/~hersh/hit-workforce-hersh.pdf 

The current situation for funding healthcare IT projects is that
agencies will have a specific healthcare information management need and
can only fund for that project. Examples are; a diabetes registry or an
AIDS treatment tracking application.  The result is that they get the
application that fills that need but the information is in a specific
format for that project and is, more often than not, incapable of being
shared with any semantic meaning with any other application.  Can the
business of healthcare IT continue in this way?

While there has been much work done over the last 40 years on healthcare
IT standards, we still aren't ahead of the game on any major scale.  
However, a core group of people have been working for almost two decades
with a primary principle of 'implementation'.  Basically, if it can't be
implemented then it doesn't work. A history of their research and
development efforts is worth the quick read:
http://www.openehr.org/about/origins.html 


Implementation is already proven in an opensource Eiffel reference
implementation as well as an opensource Java implementation of the
Reference Model.  There is also a significant C# commercial
implementation by Ocean Informatics
http://oceaninformatics.biz/CMS/index.php 

These are complimented with various opensource tools for working in this
environment (see the Software link at http://www.openehr.org ).

The Python/Zope/Plone community will be very familiar with the concepts
of two-level modeling that is represented in the openEHR specifications:
http://www.openehr.org/releases/1.0.1/roadmap.html In a nutshell, the
openEHR specs. define a very broad, core reference model, that is
constrained by a knowledge model (called archetypes).  Any
implementation of the reference model knows how to deal with the
structure of an archetype and therefore information expressed in an
archetype instance can be exchanged between applications.  

These specifications are becoming more and more widely known. In fact,
the Archetype Definition Language (ADL) is now part of a CEN (European)
health record standard and is an ISO candidate. 

As you may have noticed, there is a non-profit foundation established to
care for the IP and insure that it is and always will be open. The
openEHR Foundation is open to membership by other organizations. In
fact, the Python or Zope foundations could easily become an influential
member. There are also governance processes in place to vet the changes
in the specifications.

The project that I am announcing is the Open Source Health Information
Platform (OSHIP).  I (as others) have tinkered with Python/Zope/Plone
over the past several years in healthcare applications.  These have met
with mixed results mostly due to the same problem; lack of
interoperability (search SourceForge for more info).  

The concept of OSHIP is that it can be an application framework for
interoperable healthcare applications.  This should be especially
appealing to governments and funding agencies worldwide. OSHIP operation
is envisioned as taking the archetypes expressed in ADL and store them
in an Archetype Repository as Python objects.  These instances are then
available to developers to use in healthcare applications.  Knowledge
workers can create/edit the ADL files (using existing opensource tools)
to create whatever knowledge model may be needed for a specific
application.

The current state of OSHIP is that I have entered the specifications as
ZCA interfaces and basic implementations.  But as I said, I am a
'tinkerer'.  I need your help in evaluating this basic implementation
and fleshing out the classes according to the specifications.  

The functioning components already include a parser for the ADL files
and an (almost complete) object builder to store these in the ZODB for
use by OSHIP users. 

While I am now appealing to the broader Python/Zope communities for
participation.  There is already interest in OSHIP.  There is a workshop
scheduled ( http://www.oshipworkshop.if.uff.br )for July 21, 2008 where
we will be spending 10 days on health informatics, openEHR and OSHIP.
The goal is to actually develop one or more OSHIP applications as
examples.  There is at least one PhD student that is using these ideas
for his project.  OSHIP is already considered to be the Python reference
implementation of the openEHR specs.  (BTW: for anyone interested there
is a Ruby implementation underway as well).

In order to promote the widest use of the openEHR specifications; OSHIP
is licensed under the Mozilla tri-license
http://www.mozilla.org/MPL/boilerplate-1.1/mpl-tri-license-txt

If you have any interest in helping move this project ahead please join
the developer's list at the SourceForge Project site:
http://sourceforge.net/projects/oship

The sourcecode will be placed on the openehr.org SVN server by 31 May,
2008. I also plan to put an egg on the SF site.  This will be 'alpha'
level code, though I hope that we can move to a beta stage at a fairly
rapid pace (mid July?). I do not envision that the Zope experts will
need to do the actual manual labor of fixing a lot of this code. If I
can get some helpful suggestions then I will gladly do the work as well
as manage others helping out.  

As an aside, one of the key benefits to this project is that the core
documentation is already complete.  The openEHR specifications do that
for us.  We just need to finish the implementation and some top-level
ZCA specific docs. 

Thank you very much for your kind attention to this project that holds
such a deep passion for me.

Sincerely,
--Tim Cook
    
-- 
Timothy Cook, MSc
Health Informatics Research & Development Services
LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook 
Skype ID == timothy.cook 
**************************************************************
*You may get my Public GPG key from  popular keyservers or   *
*from this link http://timothywayne.cook.googlepages.com/home*
**************************************************************
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From patrickstinson.lists at gmail.com  Fri May 30 15:14:57 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Fri, 30 May 2008 11:14:57 -0800
Subject: python, dlls, and multiple instances
Message-ID: <6214d7a20805301214o6610d62ax70e03775740b39c5@mail.gmail.com>

Is it a correct to assume that you can use multiple instances of
python altogether if each is loaded from a separate dll? For instance,
if I write a couple of dll/so libs, and each has python statically
linked in, is it safe to assume that since dlls use their own address
space then each dll would have it's own GIL, and will therefore
coexist safely within the same app? This is correct across all
platforms, yes?

I ask because I will be writing an audio plugin that uses python both
for the gui and the audio thread. The audio thread must not be
blocked, and will also be set up as a restricted execution environment
to prevent the usual dangerous calls to open, socket, etc. The python
running in the application thread may be blocked and may do whatever
it wants.

I think my understanding is correct since our current dll
implementation statically links python, and I know that the host app
(Ableton Live) also uses python for it's scripting engine. This should
be fun, since I've wanted to write a recipe for using python in an
audio plugin GUIs for a while now.

Cheers!


From duncan.booth at invalid.invalid  Thu May 22 06:55:44 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 10:55:44 GMT
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
Message-ID: <Xns9AA6789C54B0Bduncanbooth@127.0.0.1>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:

> Not to say that your concerns are pointless, and that things cannot be 
> improved somehow, but this is not that trivial, and there may be 
> ambuiguities in some not so rare cases.

It might be worth considering an alternative approach here: a formatted 
exception includes the relevant source lines (where possible).

The source lines are cached by the module linecache.py and it probably 
wouldn't be too hard to build on the line cache so that it also scans the 
source lines looking for class statements and recording the start and end 
line numbers for each class.

That way any classname displayed would be based on the actual source 
nesting and even static methods or functions injected from another class 
would work 'correctly' (at some level).

-- 
Duncan Booth http://kupuguy.blogspot.com


From Lie.1296 at gmail.com  Wed May 14 01:51:49 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 22:51:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
Message-ID: <ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>

On May 14, 12:05 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > Just to support this statement: PHP runs an order of magnitude slower than
> > python. Yet a great deal (if not the majority) of dynamic sites out there
> > run under PHP. All of these are unhappy customers?
>
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.
>
> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
>
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss


Hello, you're showing a sign of negligence (and ignorance). HTML is a
data descriptor language, PHP is a process descriptor (scripting)
language. They are not interchangeable, and most PHP code produces
HTML in the end. Them saying that they handcode everything means
they're now using a handcoded HTML with PHP instead of WYSIWYG HTML
with PHP they used previously. PHP is still used down there. And if a
big, well-known website claimed that they handcode is a big news to
you, you're just ignorant enough to ignore the fact that most if not
ALL large website is handcoded since they used scripting (mainly as
PHP and Javascript) extensively so that WYSIWYG is not the easiest way
to do it. WYSIWYG is good enugh for static website which most mediocre
website needs, not for dynamic site which is the need for any huge
website. And anything much huger would use a collaboration between
PHP, HTML, Javascript, and a real programming language (like C-family,
Python, Java, Basic). What do you reckon the search engine behind
Google is written in? PHP?

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

Faster in what sense? As I can see it, to write something that
requires 5 keystrokes in Python (a = b) requires 9 keystrokes in FT
(Set a to b) that's almost double. And haven't I mentioned FT's dot .
is just like C's semicolon ;? Would it need a professor to mention
that any program code of reasonable length would need to be indented?
Which FT seems to discourage?

And it seems that FT is ignorant enough to ignore the rule it have
created itself before. If it doesn't cojoin english words such as Go
To, why it cojoins Writeline, squareroot? And if I want to create a
function name that consist of more than one word, I would have to
cojoin the words, what's the point in that?

And your 8 by 8 cross compiler doesn't impress me at all, they're all
based on x86/IA-32 architecture which is quite similar, no PowerPC,
SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
single language compiler instead of three dimensional compiler that
GCC is (cross platform, cross target platform, cross language).

(snip)



From kay.schluehr at gmx.net  Wed May 21 11:39:48 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 21 May 2008 08:39:48 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <a505e370-f352-4dfd-b7e0-605092d4c72d@m73g2000hsh.googlegroups.com>

On 21 Mai, 11:38, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

You are perfectly correct. Pythons design is lacking here IMO. But
what is your question?


From jonbutler88 at googlemail.com  Wed May 21 04:58:34 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 01:58:34 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
Message-ID: <1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>

On May 21, 9:53?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Wed, 21 May 2008 01:18:00 -0700 (PDT), jonbutle... at googlemail.com
> declaimed the following in comp.lang.python:
>
> > Any ideas of how to fix this? Im using python 2.5.2 on mac osx
>
> ? ? ? ? In the absence of minimal runable code reproducing the error
> message...
>
> ? ? ? ? Did you remember to INITIALIZE the attribute to a null value
> somewhere prior to that statement?
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Its not a variable I set, its one of HTMLParser's inbuilt variables. I
am using it with urlopen to get the source of a website and feed it to
htmlparser.

def parse(self, page):
        try:
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

This is the code I am using. I have tested the other modules and they
work fine, but I havn't got a clue how to fix this one.


From kamhung.soh at gmail.com  Tue May  6 23:49:12 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 07 May 2008 13:49:12 +1000
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
Message-ID: <op.uarl8ahfev04yd@melwxp23>

On Wed, 07 May 2008 09:09:08 +1000, Kam-Hung Soh <kamhung.soh at gmail.com>  
wrote:

> On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson  
> <mcrobertson at hotmail.com> wrote:
>
>> I'm having trouble opening a file in linux, whose path has spaces in it.
>>
>> $ mkdir my\ test
>> $ echo test > my\ test/test.txt
>> $ python
>>
>>  >>> open('./my test/test.txt')
>> Exception
>>  >>> open('./my\\ test/test.txt')
>> Exception
>>
>
> Try a string literal by prefixing your path string with "r":
>
> open(r'./my test/test.txt')
>
> See http://docs.python.org/ref/strings.html
>
>> but yet...
>>
>>  >>> import os
>>  >>> os.chdir('./my test')
>>  >>> open('./test')
>>
>> works just fine.
>
> Couldn't test on Linux, but in Windows ...
>
>>>> os.chdir('C:\temp\my test')
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume label  
> syntax is incorrect: 'C:\temp\\my test'
>

Oops.  Should have been:

>>> os.chdir(r'C:\temp\my test')
>>> (no errors)

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 08:49:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 14:49:30 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
Message-ID: <48356bc7$0$19726$426a74cc@news.free.fr>

s0suk3 at gmail.com a ?crit :
(snip)
> Maybe if I have a kid someday I'll teach him Flaming
> Thunder! (just kidding, you prick).

Err... Could we please avoid name calling, gentlemens ?


From daveparker at flamingthunder.com  Wed May 21 16:34:14 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 13:34:14 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>

On May 21, 12:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:

> >>> a+0.999 ? ? # gives expected result
> 9999999999999998.0
> >>> a+0.9999 ? # doesn't round correctly.
>
> 10000000000000000.0

Shouldn't both of them give 9999999999999999.0?

I wrote the same program under Flaming Thunder:

     Set a to 10^16-2.0.
     Writeline a+0.999.
     Writeline a+0.9999.

and got:

     9999999999999998.999
     9999999999999998.9999

I then set the precision down to 16 decimal digits to emulate Python:

     Set realdecimaldigits to 16.
     Set a to 10^16-2.0.
     Writeline a+0.999.
     Writeline a+0.9999.

and got:

      9999999999999999.0
      9999999999999999.0


From http  Mon May 26 16:54:56 2008
From: http (Paul Rubin)
Date: 26 May 2008 13:54:56 -0700
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <7xhcckiy5b.fsf@ruckus.brouhaha.com>

notnorwegian at yahoo.se writes:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
> so obv i want fast insert. i want to delete duplicates too.
> which datastructure is best for this?

Nobody has mentioned balanced-tree data structures so you might want
to look them up.  


From johnjsal at NOSPAMgmail.com  Tue May 20 00:38:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 00:38:57 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>
Message-ID: <20080520003857.b1823ec1.johnjsal@NOSPAMgmail.com>

On Tue, 20 May 2008 00:09:14 -0400
John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> Not that you need help anymore, but I decided to give it a try. Not as elegant as the one- and two-liners, but somewhat concise I guess.

Whoops! Could be cleaner! :)

def compress(s):
    new = []

    for c in s:
        if c not in new:
            new.append(c)
    return ''.join(new)


No, wait! I can do better!

def compress(s):
    new = []
    [new.append(c) for c in s if c not in new]
    return ''.join(new)

Wow, list comprehensions are cool.


From shabda.raaj at gmail.com  Fri May 23 02:50:25 2008
From: shabda.raaj at gmail.com (shabda raaj)
Date: Thu, 22 May 2008 23:50:25 -0700 (PDT)
Subject: [Regexes] Stripping puctuation from a text
Message-ID: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>

I want to strip punctuation from text.

So I am trying,

>>> p = re.compile('[a-zA-Z0-9]+')
>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
'  !!  ! ... ?'

Which gave me all the chars which I want to replace.

So Next I tried by negating the regex,

>>> p = re.compile('^[a-zA-Z0-9]+')
>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
' love tomatoes!! hell yeah! ... Why?'

But this removed the first char instead of the puctuation. So I guess
^ is matching start of line, instead of negation. How can I take
negation of the regex here?


From python at bc90021.net  Sun May 11 15:28:39 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 19:28:39 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
Message-ID: <HNHVj.32518$KJ1.10846@newsfe19.lga>

> ...and the exact error message was?
> 
> Here is a tip: if you want people to help you, then you have to help
> them to help you.  Personally, I wouldn't respond to anymore of your
> questions because you seem incapable of posting the information that was
> requested.

So far, the people who have answered this post have gone on the 
assumption that I'm stupid.  I'm not.  I took perfectly working code, 
cut it from one class, and put it in another.  It stopped working in the 
second class.  I've spent days on this and trust me, given what I've 
experienced of the Python community so far, if I didn't have to ask, I 
wouldn't.

(I really must say that so far the help I am getting in the Python 
community is a big let down.  Whether it's on IRC or here, everyone has 
an arrogance that I don't find anywhere else in the open source 
community, and it seriously makes me question the choice of language that 
I've made.)

The error message was at the top of the thread (am I incapable of posting 
it, or are you incapable of following a thread?), but here it is again:

IOError: [Errno 2] no such file u'tempfileName'



From saluk64007 at gmail.com  Mon May 26 13:52:52 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 10:52:52 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1es85$r7u$03$1@news.t-online.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com>
Message-ID: <c3f69bf60805261052u499c7d3cl8647a85b12a6887a@mail.gmail.com>

Did no one hear me mention Spyce?

It is exactly what the OP specifically asked for.

Here's the link: http://spyce.sourceforge.net/

It is not under active development, but is fairly complete (it was under
active development for quite a few years).

And if you want to go the template route (use templates as if they were php,
write a simple controller that uses directory structure), I would build it
on cherrypy.  Turbogears or Django are overkill for this.  Cherrypy is a
very simple controller part of the MVC.

http://www.cherrypy.org

You would write a class something like this:

class Root:
    @exposed
    def default(self,path):
        if path.endswith(".temp"):
            yield template.read(path)
        else:
            #handle other filetypes

But I recommend spyce.  It's exactly what you are looking for.
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From straton at lampsacos.demon.co.uk  Sun May  4 17:16:50 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 04 May 2008 22:16:50 +0100
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same    time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <fvl946$jua$1$830fa7b3@news.demon.co.uk>

Gilly wrote:
> Hi
> I am trying to create an application that uses some form of input to
> create a midi file.
> I would like for this to be a 'real time' process. In other words, I
> want to be able to begin playing the midi file before I finish writing
> it, and continue writing as it plays.
> 
> I would really appreciate any help possible on this matter.
> 
> Thanks!!
Not python, but have you come across XMidi (http://www.palserv.com/XMidi/) ?

It is used in the Apache Cocoon project, which has a
Midi 'block'.
This allows you to go from an XML file, or other
source, to XMidi (an XML version of MIDI), and then
to Quicktime, which you can listen to in your browser.

I'm afraid I don't know whether the source can be
streaming XML or whether you have to reach the end
of the XML before it starts to play.

If you can use streaming XML, you should be able to
generate it from python. Foursuite has a streaming
XML class, for example.

********************************************

A quick synopsis on the cocoon site says:

What is the MIDI block?

The MIDI block currently gives you an XMidiGenerator to generate an XML 
representation of any MIDI file (called XMidi by its author Peter Loeb). 
There is also the XMidiSerializer to render XMidi back as a MIDI file. I 
have used XSLT to provide some basic musical manipulations such as 
transposition, and inversion. Retrograde is harder, but I shall see what 
I can come up with. Hopefully I shall also add some transformers to 
generate SVG visualisations of the XMidi, starting with normal western 
musical notation.


From Joshuajruss at gmail.com  Sat May 24 23:42:57 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sat, 24 May 2008 20:42:57 -0700 (PDT)
Subject: finding icons for Apps
Message-ID: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>

This might be a dumb question. I don't know. I'm new to all this. How
do you find icons for your programs? All GUI applications have cool
icons that represent various things. For instance, to save is often
represented as a disk, etc. You know, the small little picture
references that give meaning to the phrase 'Graphical User Interface'.
But I'm not a graphics artist! Drawing is simply one talent that
skipped me completely. Where can I find icons to use with my programs?

I don't even know how to search for them, because I'm not sure how to
word it. I tried Googling various things: icons, software graphics,
application icons, custom graphics, etc, etc. But I'm not getting much
luck here you guys.

Also, besides just finding a collection of various pre-made icons, who
would I talk to to make me some original custom made icons? I'll look
for hours and find one or two places, but they never respond to my
messages, so I figure they must not do that kind of art work.

I'm looking for both: a collection of graphics and some place (or
someone) that can make custom original graphics. The latter is just
for future reference. The more important one is the former, because I
can't even afford to pay for originals right now. But maybe I will
soon, so it would be nice to have a resource.

Thanks in advance,
Joshua


From martin at v.loewis.de  Mon May  5 12:33:39 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 05 May 2008 18:33:39 +0200
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <mailman.590.1209997850.12834.python-list@python.org>
References: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>	<20080505141651.6859.554247783.divmod.quotient.59048@ohm>
	<mailman.590.1209997850.12834.python-list@python.org>
Message-ID: <481F36E3.3050400@v.loewis.de>

> some_module.some_thing(the_string) function is a swig generated
> function from a C lib. The C lib function expects unsigned char *.
> 
> The generated function is:

If you don't want to change the generated function, I recommend to
put a wrapper around it, as Jean-Paul suggested:

def some_thing(s):
  return some_thing_real(s.encode("utf-8"))

Regards,
Martin


From gagsl-py2 at yahoo.com.ar  Mon May 12 01:39:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 02:39:11 -0300
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
Message-ID: <op.ua00nlypx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> escribi?:

> Collin wrote:
>> I'm pretty new to Python, but this has really bugged me. I can't find a
>> way around it.
>>
>>
>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>
>> Any help would be appreciated. Thanks.
>
>
> Oh, wow. I feel so stupid. Please disregard this message. <_<

No need to apologize...

> I read the error message just now a bit more carefully, and I tried
> something. I tried defining "yes" as some random numerical value. Then
> when I did:
> (example code)
>
> yes = 123123983 #some number
> test = input("Test test test ")
> if test == yes:
> 	print "It worked."
> else:
> 	print "failed"
>
> (example code off)

The usual way for Python<3.0 is:

answer = raw_input("Test test test ").lower()
if answer == "yes":
     ...

The input() function evaluates user input as an expression: if he types 2+5 the input() function returns the integer 7. I would never use input() in a program - it's way too unsafe; use always raw_input instead.

-- 
Gabriel Genellina



From hv at tbz-pariv.de  Fri May  9 05:16:19 2008
From: hv at tbz-pariv.de (Thomas Guettler)
Date: Fri, 09 May 2008 11:16:19 +0200
Subject: xml.etree Syntax of path?
Message-ID: <68ij33F2tl90fU1@mid.individual.net>

Hi,

I think the documentation of xml.etree is missing something[1].

{{{
find(path)
     Finds the first toplevel element with given tag. Same as getroot().find(path). path is the element to look for.
}}}

According to the source etree has limited support for xpath. I think it should be documented
what 'path' should look like to.


[1]
http://docs.python.org/lib/elementtree-elementtree-objects.html


-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de


From castironpi at gmail.com  Tue May 13 07:20:32 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:20:32 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com> 
	<mailman.1045.1210677569.12834.python-list@python.org>
Message-ID: <59dc600e-bffa-47e9-b579-473fd35572cf@d45g2000hsc.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:46:45 -0300, <dannywebs... at googlemail.com> escribi?:
>
> > On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> >> Hi - I have a list returned from popen/readlines, and am wondering how
> >> to go about iterating over each item which was returned (rather than
> >> currently having the whole lot returned).
>
> >> >>> f=os.open("./get_hostnames").readlines
>
> > I did indeed mean "os.popen", no "os.open"
>
> Ouch, replace open with popen an my example is valid (but to get the ?
> meaning I intended to write, replace os.open with open...)
>
> --
> Gabriel Genellina

Writing's fine, but don't the musicals suck?


From tonal at promsoft.ru  Thu May  8 03:41:39 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Thu, 08 May 2008 14:41:39 +0700
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
References: <48215537.100@promsoft.ru>	<mailman.695.1210147319.12834.python-list@python.org>
	<3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
Message-ID: <4822AEB3.9040307@promsoft.ru>

Tim Roberts wrote:
 > I think that's a perfectly reasonable thing to expect.  At the risk of
 > over-generalization, there is no good reason why, by this point in time,
 > all of the standard library routines that accept strings shouldn't also
 > accept Unicode strings.
However, file(fname), open(fname), os .*, os.path .*, 
time.strftime(format) take unicode parameters.
See http://bugs.python.org/issue2782


From antroy at gmail.com  Fri May 16 07:43:17 2008
From: antroy at gmail.com (Ant)
Date: Fri, 16 May 2008 12:43:17 +0100
Subject: Pyparsing Question
Message-ID: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>

Hi all,

I have a question on PyParsing. I am trying to create a parser for a 
hierarchical todo list format, but have hit a stumbling block. I have 
parsers for the header of the list (title and description), and the body 
(recursive descent on todo items).

Individually they are working fine, combined they throw an exception. 
The code follows:

#!/usr/bin/python
# parser.py
import pyparsing as pp

def grammar():
     underline = pp.Word("=").suppress()
     dotnum = pp.Combine(pp.Word(pp.nums) + ".")
     textline = pp.Combine(pp.Group(pp.Word(pp.alphas, pp.printables) + 
pp.restOfLine))
     number = pp.Group(pp.OneOrMore(dotnum))

     headtitle = textline
     headdescription = pp.ZeroOrMore(textline)
     head = pp.Group(headtitle + underline + headdescription)

     taskname = pp.OneOrMore(dotnum) + textline
     task = pp.Forward()
     subtask = pp.Group(dotnum + task)
     task << (taskname + pp.ZeroOrMore(subtask))
     maintask = pp.Group(pp.LineStart() + task)

     parser = pp.OneOrMore(maintask)

     return head, parser

text = """


My Title
========

Text on a longer line of several words.
More test
and more.

"""

text2 = """

1. Task 1
     1.1. Subtask
         1.1.1. More tasks.
     1.2. Another subtask
2. Task 2
     2.1. Subtask again"""

head, parser = grammar()

print head.parseString(text)
print parser.parseString(text2)

comb = head + pp.OneOrMore(pp.LineStart() + pp.restOfLine) + parser
print comb.parseString(text + text2)

#===================================================================

Now the first two print statements output the parse tree as I would 
expect, but the combined parser fails with an exception:

Traceback (most recent call last):
   File "parser.py", line 50, in ?
     print comb.parseString(text + text2)
.
. [Stacktrace snipped]
.
     raise exc
pyparsing.ParseException: Expected start of line (at char 81), (line:9, 
col:1)

Any help appreciated!

Cheers,

-- 
Ant.


From gagsl-py2 at yahoo.com.ar  Thu May 15 02:44:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 03:44:42 -0300
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
Message-ID: <op.ua6nos2nx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 14 May 2008 23:47:56 -0300, George Sakkis <george.sakkis at gmail.com> escribi?:

> I spent several hours debugging some bogus data results that turned
> out to be caused by the fact that heapq.nlargest doesn't respect rich
> comparisons:
>
>     import heapq
>     import random
>
>     class X(object):
>         def __init__(self, x): self.x=x
>         def __repr__(self): return 'X(%s)' % self.x
>         if True:
>             # this succeeds
>             def __cmp__(self, other): return cmp(self.x , other.x)
>         else:
>             # this fails
>             def __lt__(self, other): return self.x < other.x
>
>     s = [X(i) for i in range(10)]
>     random.shuffle(s)
>
>     s1 = heapq.nlargest(5, s)
>     s2 = sorted(s, reverse=True)[:5]
>     assert s1 == s2, (s,s1,s2)
>
>     s1 = heapq.nsmallest(5, s)
>     s2 = sorted(s)[:5]
>     assert s1 == s2, (s,s1,s2)
>
>
> According to the docs, nlargest is equivalent to: "sorted(iterable,
> key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> be at least a documentation bug, if not an implementation one.

Your class is not properly defined. sorted() only uses < to compare items, but this fact is NOT documented as far as I can tell. So you are abusing this implementation detail by not defining the other comparison operators, and the X class has a rather strange behavior:

py> X(1)<X(2)
True
py> X(1)<=X(2)
False  # !!!
py> X(1)>X(2)
False
py> X(1)==X(1)
False  # !!!

If you write all the six rich comparison methods (__lt__, __le__, etc) nlargest and nsmallest work fine.
If your objects are fully comparable (like numbers; that is, given A and B, one and only one of these holds: A<B, A==B, A>B) the easiest way is to write a helper function (like the old __cmp__) and implement the rich comparison methods using it. Those six methods could be defined in a mixin class.

-- 
Gabriel Genellina



From bj_666 at gmx.net  Wed May 21 04:17:21 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 21 May 2008 08:17:21 GMT
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <69i44hF30tko7U2@mid.uni-berlin.de>

On Wed, 21 May 2008 07:54:32 +0000, mh wrote:

> I want to iterate over members of a module, something like:
> 
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
> 
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?

Take a look at the `inspect` module.

Ciao,
	Marc 'BlackJack' Rintsch


From larry.bates at websafe.com`  Thu May 22 19:12:33 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 18:12:33 -0500
Subject: Using os.walk to return files in subdirectories
In-Reply-To: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
References: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
Message-ID: <JsWdncuznKhkYKjVnZ2dnUVZ_jadnZ2d@comcast.com>

dj wrote:
> Hello All,
> 
> I am attempting to us os.walk to populate two lists with values from a
> directory. The first list contains all the files in the directory and
> subdirectories.
> The second list contains only the files in the subdirectories.
> 
> Here is the code:
> 
> import os
> 
> # list of matching files
> allfiles = [] #store all files found
> subfiles = []  # subdir
> 
> for root,dir,files in os.walk("H:/python_experiments", f1):
>      # this list has the files in all directories and subdirectories
>      filelist = [ os.path.join(root,fi) for fi in files if
> fi.endswith(".py") or fi.endswith(".txt") ]
>      for f in filelist:
>          allfiles.append(f)
> 
>      # split the root
>      s= root.split(('\\') or ('\/'))
>      print 's ',
>      print s
> 
>      # assign the last value to end to come to values in dir
>      end= s[-1]
>      print 'end ',
>      print end
>      print '\n'
> 
>      # this list contains only the files in subdirectories
>      for d in dir:
>         if end == d:
>          print 'subdir % s' % (end)
>          sublist = [ os.path.join(root, fi) for fi in files if
> fi.endswith(".py") or fi.endswith(".txt")]
>          for f in sublist:
>              subfiles.append(f)
> 
> for i in subfiles:
>     print 'subfile', i
> 
> 
> for i in allfiles:
>     print "file ", i
> 
> The allfiles list is populated, but the subfiles list is not. Any
> Suggetions ?


I think you were trying to make this harder than it actually is.  Here is a 
tested script that works for me.

import os
basePath = 'c:/Python25'
allfiles = []
subfiles = []

for root, dirs, files in os.walk(basePath):
     for f in files:
         if f.endswith('.txt') or f.endswith('.py'):
             allfiles.append(os.path.join(root, f))
             if root != basePath: # I'm in a subdirectory
                 subfiles.append(os.path.join(root, f))

print "allfiles=", allfiles
print
print "subfiles=", subfiles
print
print "len(allfiles)=", len(allfiles)
print "len(subfiles)=", len(subfiles)


-Larry Bates


From tenax.raccoon at gmail.com  Thu May 29 14:06:50 2008
From: tenax.raccoon at gmail.com (Jason)
Date: Thu, 29 May 2008 11:06:50 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>

On May 29, 10:07 am, allendow... at gmail.com wrote:
> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen

I've got Python 3.0 alpha 2.  In this version, it looks like you can
define classes in either the old style or new style.  (I snipped the
top line a bit in the following example):

Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
Type "help", "copyright", "credits" or "license"
>>> class one(object): pass
...
>>> class two: pass
...
>>> two
<class '__main__.two'>
>>> one
<class '__main__.one'>
>>> type(one)
<type 'type'>
>>> type(two)
<type 'type'>
>>>

That said, old-style classes can't use the staticmethod or classmethod
properties correctly.  New-style classes better support multiple
inheritance and old-style classes can't use metaclasses.  Metaclasses,
and even multiple inheritance may be beyond the scope of your book,
though.

I'd recommend new-style classes myself, as it avoids some nasty subtle
problems if your readers move to more advanced techniques.  You are
correct, though, that some of the classes in the Python library use
the old style.

So, you might want to acknowledge that there are two ways of doing
classes, that a lot of old code uses the old way.  The new way adds
some powerful new techniques that may be beyond the scope of your
book.  In Python 3.0, it won't matter, as everything is a new-style
class anyway.

  --Jason


From ZeeGeek at gmail.com  Wed May 21 02:13:24 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Tue, 20 May 2008 23:13:24 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
	<0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>
	<MPG.229d3757e185e12e98975f@news.individual.de>
Message-ID: <6243ed5b-fe5e-46c3-b5dc-f0dafbf61e5b@s33g2000pri.googlegroups.com>

On May 21, 2:31?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Tue, 20 May 2008 09:31:27 -0700 (PDT))
>
>
>
> > On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> > > > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> > > > > > Hi, what's the default localedir for gettext module on windows? In
> > > > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > > > order to make the translation work?
>
> > > > > %PYTHONHOME%\share\locale
>
> > > > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > > > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > > > use:
>
> > > > import gettext
> > > > gettext.install('testprogram', unicode = True)
>
> > > The syntax is correct. Is the test program localised under Linux or
> > > Cygwin? If not then the error is somewhere in your application.
>
> > Yes, it's localized under linux.
>
> > > How did you try to set the language on Windows? It works for me on Vista
> > > with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> > > be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> > > correctly).
>
> > I'm using Simplified Chinese Windows, so I didn't set anything
> > specifically before firing up the program. I found that if I use
> > gettext.GNUTranslations to read in the .mo file, then it's localized.
> > But gettext.install doesn't work.
>
> Well, then why don't you set the environment variable for testing!?

Yes, it works for the program strings by setting LANG to zh_CN. But
glade strings are not localized. I did call gtk.glade.bindtextdomain
and gtk.glade.textdomain, and it works in Linux.


From sturlamolden at yahoo.no  Wed May 21 13:50:53 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:50:53 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com> 
	<0DFYj.28609$ie5.21801@newsfe05.ams2>
	<4833f28d$0$3737$426a74cc@news.free.fr>
Message-ID: <e0d2e0fe-f339-43ca-a83f-365f36b68bb0@m36g2000hse.googlegroups.com>

On May 21, 11:59 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:

> Strange enough, no one calls Java or C# 'interpreted languages', while
> they (or, to be more exact, their reference implementations) both  use
> the same byte-code/VM scheme[1].

Java interprets the bytecode in a virtual machine by default. Only
code 'hotspots' are JIT compiled to native machine code.
Microsoft .NET compiles bytecode to native code on the first
invocation, and caches the machine code for later use. Nothing is
interpreted.

Java can benefit from more runtime information when generating machine
code, but incurs the penalty from running an interpreter most of the
time. MS .NET is more similar to a static compiler. They currently
perform about equally well, sometimes approximating traditional
compiled languages like C++.

But they do not use the same bytecode VM scheme. Particularly,
Microsoft .NET has no virtual machine.

> You know, Common Lisp is also an highly dynamic language, and there are
> now some optimizing native-code Common Lisp compilers that generate very
> efficient binary code. It only tooks about 30 years and way more
> ressources than CPython ever had to get there...

The speed of Common Lisp with compilers like SBCL and CMUCL comes from
optional static typing. This no more magical than what Cython and
Pyrex already can do. If we remove the interpreter when Cython or
Pyrex supports all features of the Python language, and instead rely
on "JIT compilation" by one oth these compilers, we are already there.






From petr.poupa at gmail.com  Thu May  8 08:56:55 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Thu, 8 May 2008 05:56:55 -0700 (PDT)
Subject: listen on TCP port
Message-ID: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>

Hello,
is it possibble listening on TCP port by python and how? I am trying
chilkat but poorly :(.

Thanks


From pistacchio at gmail.com  Mon May 12 03:17:48 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 00:17:48 -0700 (PDT)
Subject: module global variables
Message-ID: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>

hi to all!
can i load a module passing to it, automatically and as default, all
the caller's global variables to act as module's global variables?
thanks


From arnodel at googlemail.com  Fri May  9 15:48:05 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 20:48:05 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
Message-ID: <m2mymz45u2.fsf@googlemail.com>

umpsumps at gmail.com writes:

> On May 9, 1:45 am, cokofree... at gmail.com wrote:
>> >>> key = ''.join(sorted(word))
>>
>> I tend to strip and lower the word as well, otherwise "Hello" and
>> "hello" do not compare...depends on what you want though!
>> Plus you might get a lot of "word\n" as keys...
>>
>> My technique is the this way
>>
>> def anagram_finder(words):
>>     anagrams = {}
>>     for word in words:
>>         word = word.strip()
>>         key = ''.join(sorted(word.lower()))
>>         anagrams.setdefault(key, []).append(word)
>>     return anagrams
>
> What would be the best method to print the top results, the one's that
> had the highest amount of anagrams??  Create a new histogram dict?

You can use the max() function to find the biggest list of anagrams:

top_results = max(anagrams.itervalues(), key=len)

-- 
Arnaud


From castironpi at gmail.com  Wed May  7 15:04:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 12:04:49 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
	<mailman.712.1210185123.12834.python-list@python.org>
Message-ID: <ade78903-ae2c-4275-8018-a142321e0db3@2g2000hsn.googlegroups.com>

On May 7, 1:31?pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Wed, May 7, 2008 at 11:30 AM, Paul Melis <p... at floorball-flamingos.nl> wrote:
> > ? ? dic = {}
> > ? ? for letter in strng:
> > ? ? ? ? if letter not in dic:
> > ? ? ? ? ? ? dic[letter] = 0
> > ? ? ? ? dic[letter] += 1
>
> As a further refinement, you could use the defaultdict class from the
> collections module:
>
> ? ?dic = defaultdict(int)
> ? ? ? ?for letter in strng:
> ? ? ? ? ? ?dic[letter] += 1

Sounds like novel flow of control.


From nevillednz at gmail.com  Thu May  1 19:44:34 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Thu, 1 May 2008 16:44:34 -0700 (PDT)
Subject: RegEx for matching brackets
Message-ID: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>

Below is a (flawed) one line RegEx that checks curly brackets (from
awk/c/python input) are being matched.  Is there a one liner for doing
this in python?

ThanX
N

re_open_close="(((\{))[^{}]*((?(0)\})))+"
re_open_close=re.compile(re_open_close)
tests="""
  { this is a test  BAD
  { this is a test } OK
  { this is a test } { this is a test } OK
  { this is a test } { this { this is a test } is a test } OK
  { this is a test  { this { this is a test } is a test } missing
close BAD
""".splitlines()[1:]
for test in tests:
  if bool(re_open_close.search(test)) == bool(re.search("OK",test)):
    print "DETECTED:",test
  else:
    print "MISSED:",test
[linux]$ python ./re_matching.py
DETECTED:   { this is a test  BAD
DETECTED:   { this is a test } OK
DETECTED:   { this is a test } { this is a test } OK
DETECTED:   { this is a test } { this { this is a test } is a test }
OK
MISSED:   { this is a test  { this { this is a test } is a test }
missing close BAD


From dblubaugh at belcan.com  Tue May  6 17:53:35 2008
From: dblubaugh at belcan.com (Blubaugh, David A.)
Date: Tue, 6 May 2008 17:53:35 -0400
Subject: Bit twiddling floating point numbers
In-Reply-To: <9398d71d0804281110q181efd6au223ef65442c6fca1@mail.gmail.com>
References: <35f3b367-44cd-4595-b920-49a22162711b@c33g2000hsd.googlegroups.com>
	<1bb82da0-6640-4183-b257-cfa2bad25575@m36g2000hse.googlegroups.com>
	<%oOzj.61235$Pv2.29718@newssvr23.news.prodigy.net>
	<980961ef-43c8-4936-a536-8b5fbc04f0d0@2g2000hsn.googlegroups.com>
	<27CC3060AF71DA40A5DC85F7D5B70F3802A54539@AWMAIL04.belcan.com>
	<9398d71d0803062204n761fe7ebr277182d3424628ae@mail.gmail.com>
	<27CC3060AF71DA40A5DC85F7D5B70F380350D31D@AWMAIL04.belcan.com>
	<9398d71d0804281110q181efd6au223ef65442c6fca1@mail.gmail.com>
Message-ID: <27CC3060AF71DA40A5DC85F7D5B70F380365E2B0@AWMAIL04.belcan.com>

Sorry for the reply.  I did not get your message until now.  I was
wondering if there was a way to develop floating-point mathematics
package within a module.  I was wondering if some of your work on bit
twiddling floating - point numbers could be provided to me!!!  Thanks.  
 
 
David Blubaugh
 
 

________________________________

From: Jeff Goldfinkle [mailto:jeff.goldfinkle at gmail.com] 
Sent: Monday, April 28, 2008 2:10 PM
To: Blubaugh, David A.
Subject: Re: Bit twiddling floating point numbers


sure - go right ahead


On Mon, Apr 28, 2008 at 8:17 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:


	Are you still out there?  
	 
	 
	Can I still ask you about my question?
	 
	 
	thanks,
	 
	David
	 
	 

________________________________

	From: Jeff Goldfinkle [mailto:jeff.goldfinkle at gmail.com] 
	Sent: Friday, March 07, 2008 1:04 AM
	To: Blubaugh, David A. 

	Subject: Re: Bit twiddling floating point numbers
	

	Hi David
	
	Sure. I'm not sure what help I can be, but ask away.
	
	Jeff
	
	
	
	
	On Thu, Mar 6, 2008 at 11:25 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:
	

		Jeff,
		
		
		Hello.  This idea or representing a float with long
seems to be
		extremely interesting.  I am currently utilizing the
MyHDL environment
		to map algorithms to hardware.  May I ask you more
questions in order to
		map integer mathematics to emulate floating -point
mathematics, in order
		to maybe develop efficient pseudo-floating-point
hardware??
		
		 Thanks,
		
		David Blubaugh
		
		
		
		
		
		-----Original Message-----
		From: Jeff.Goldfinkle at gmail.com
[mailto:Jeff.Goldfinkle at gmail.com]
		Sent: Thursday, March 06, 2008 4:01 PM
		To: python-list at python.org
		Subject: Re: Bit twiddling floating point numbers
		
		On Mar 6, 11:00 am, Bryan Olson
<fakeaddr... at nowhere.org> wrote:
		> Mark Dickinson wrote:
		
		> > Jeff Goldfin wrote:
		> >> I can pack and unpack a float into a long e.g.
		> >> struct.unpack('I',struct.pack('f',0.123))[0]
		> >> but then I'm not sure how to work with the
resulting long.
		>
		> >> Any suggestions?
		>
		
		> > One alternative to using struct is to use math.ldexp
and math.frexp:
		>
		> >>>> m, e = frexp(pi)
		> >>>> m
		> > 0.78539816339744828
		> >>>> e
		> > 2
		> >>>> int(m*2**53)
		> > 7074237752028440L
		>
		> > Then you can do your bit twiddling on int(m*2**53),
before using
		> > ldexp to 'repack' the float.
		>
		> Ah, those are handy. Jeff described his problem: "In
particular, I
		
		> would like to round my float to the n most significant
bits."
		
		> I think this works:
		>
		>    from math import frexp, ldexp, floor
		>
		>    def round_mantissa(x, nbits):
		>        shifter = 1 << nbits
		>        (m, e) = frexp(x)
		>        m = floor(m * shifter + 0.5) / shifter
		>        return ldexp(m, e)
		>
		> --
		> --Bryan
		Thanks for the help - your function seems to fit the
bill even better
		than gmpy since I don't need an external module. In my
case I'll use m =
		floor(m * shifter) / shifter instead of m = floor(m *
shifter +
		0.5) / shifter
		
		Jeff
		
		
		
		This e-mail transmission contains information that is
confidential and may be
		privileged. It is intended only for the addressee(s)
named above. If you receive
		this e-mail in error, please do not read, copy or
disseminate it in any manner.
		If you are not the intended recipient, any disclosure,
copying, distribution or
		use of the contents of this information is prohibited.
Please reply to the
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message was misdirected.
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		correcting this error is appreciated.
		
		


	This e-mail transmission contains information that is
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From deets at nospam.web.de  Wed May 28 11:24:41 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 17:24:41 +0200
Subject: BadStatusLine error
References: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>
Message-ID: <6a5bqpF165l66U1@mid.uni-berlin.de>

Jim wrote:

> Hi
> 
> I get a BadStatusLine error (indicated below). Can anyone help with
> how to
> catch error in code before abort?

http://docs.python.org/tut/node10.html

Diez


From cjames at callone.net  Tue May 27 16:58:15 2008
From: cjames at callone.net (c james)
Date: Tue, 27 May 2008 15:58:15 -0500
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <g1hsl7$959$1@ger.gmane.org>

duli wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.
> 
> Most of the code I have written and books that I have read deal with
> toy programs and I am looking for something a bit more
> comprehensive.  For example, maybe a complete compiler written in C++
> for some language, or a complete web server or implementing
> .net libraries in some language (just a few examples of the scale of
> things I am interested in learning).
> 
> Thanks!
> Duli.
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

"Dreaming in Code" www.dreamingincode.com may fit part of this 
description. While it isn't exactly what you desire, it is a good read 
on the difficulty in creating excellent software.



From not-for-mail at sonic.net  Tue May  6 10:55:07 2008
From: not-for-mail at sonic.net (Raymond)
Date: 06 May 2008 14:55:07 GMT
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
Message-ID: <4820714b$0$34544$742ec2ed@news.sonic.net>

>Another approach is to use the split() function in "re" module.

Ah ha, thar's the disconnect.  Thanks for all the pointers, my def is
now working.  Still don't understand the logic behind this design though.
I mean why would any programming language have separate search or find
functions, one for regex and and another for non-regex based pattern
matching?

Aren't sed, awk, grep, and perl the reference implementations of search
and replace?  They don't have non-regex functions, why does Python?
Wouldn't it be a lot simpler to use a flag, like grep's '-f', to change
the meaning of a search string to be literal?

My other gripe is with the kludgy object-oriented regex functions.
Couldn't these be better implemented in-line?  Why should I, as a coder,
have to 're.compile()' when all the reference languages do this at compile
time, from a much more straightforward and easy to read in-line function...

Raymon


From google at mrabarnett.plus.com  Tue May 20 17:40:48 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 20 May 2008 14:40:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <60f15334-e7fa-4a27-add1-5f4fd2e14276@w4g2000prd.googlegroups.com>

On May 20, 4:20 am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > > I <davepar... at flamingthunder.com> wrote:
> > > Plus, me getting paid to work on Flaming Thunder is far more
> > > motivating than me not getting paid to work on Python.
> > On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > That's truly disappointing.
>
> I guess I could have stated that better.  Flaming Thunder is a labor
> of love for me.  I've programmed in almost every language since
> FORTRAN and Lisp, and Flaming Thunder is the language I've always
> wished the others were.
>
> For one example, I've always preferred compiled languages because
> they're faster.  So Flaming Thunder is compiled.
>
> For another example, I've always preferred languages that are English-
> like because it's easier to return to your code after several years
> and still know what you were doing (and it's easier for someone else
> to maintain your code).
>
> For over 5 years I've been working on Flaming Thunder unpaid and on my
> own, getting the back-end up and running.  8-by-8 shotgun cross
> compilers written in assembly language, that can fit all of the
> libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
> OS X and Windows into a single executable file that's less than 180K,
> aren't written overnight.
>
> So now that I've released it, it's extremely gratifying that people
> think it's cool enough to actually pay $19 for it.  That gives me lots
> of motivation (and buys enough time) for me to add features to it as
> fast as possible.
>
> To whit: you pointed out the awkwardness in Python of having to
> declare a for-loop variable when you only wanted to loop a specific
> number of times and didn't need the variable.  Last week, Flaming
> Thunder had the same awkwardness.  If you wanted to loop 8 times:
>
> for i from 1 to 8 do <statement>
>
> you still had to use a variable (in this case, i).  This week, I've
> added two new for-loop variations that fix that awkwardness, and also
> allow you to explicitly declare an infinite loop without having to
> rely on idiomatic constructs such as while-true.  Examples of the two
> new variations (for-forever and for-expression-times):
>
> Write "Fa".
> For 8 times do write "-la".
>
Personally (and borrowing from Python), I'd prefer something more
like:

Write "Fa".
Repeat 8 times:
    Write "-la".

> For forever do
>   (
>   Write "Do you know the definition of insanity? ".
>   Read response.
>   ).

Repeat:
    Write "Do you know the definition of insanity? ".
    Read response.


From wuwei23 at gmail.com  Fri May 30 06:22:21 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 30 May 2008 03:22:21 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<5c5744cb-d801-48aa-b34d-c03c036d4885@w8g2000prd.googlegroups.com>
Message-ID: <8bdbd7f0-2b60-4a31-8ee6-edaed0496cc8@w5g2000prd.googlegroups.com>

On May 30, 7:39 pm, Lie <Lie.1... at gmail.com> wrote:
> An example is python's notion for 'for' loop, which can
> only loop a list[...]

Actually, the for statement steps through any object that provides an
iterator interface. Lists just happen to be one such object type.



From castironpi at gmail.com  Wed May 14 05:32:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 02:32:40 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
Message-ID: <6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com>

On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > you can safely ignore its posts.
>
> > How does it generate text?
>
> My guess is by inhaling a lot of intoxicants.

However you know what would be helpful?  If I could go to the right
place to start the ring.


From duncan.booth at invalid.invalid  Fri May 16 09:34:42 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 May 2008 13:34:42 GMT
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
	<mailman.1218.1210936257.12834.python-list@python.org>
Message-ID: <Xns9AA09442779A0duncanbooth@127.0.0.1>

Tim Golden <mail at timgolden.me.uk> wrote:

>> 3) You assume, that Firefox is always installed at C:\Program
>> Files\Mozilla Firefox\firefox.exe
>> However the path largely differs from system to system. 
> 
> This is broadly true. However, it's fairly clear from the
> phrase "the user's desktop" that the OP is working in some
> kind of corporate environment where he can be fairly sure
> where Firefox is installed by policy. In addition, it's not so
> easy to find its path if it's not in the default place since apps 
> very rarely add their location to the system PATH these days 
> (and Firefox certainly doesn't). You could scan the registry for 
> its App Paths entry in the registry but I don't know if any other 
> way if it's not  the default browser (which it's clear from the 
> original post it  may not be).
> 

It's not too hard to get the required command line from the registry:

import _winreg
print _winreg.QueryValue(_winreg.HKEY_CLASSES_ROOT,
    'FirefoxURL\shell\open\command')

and of course it throws an exception if firefox isn't installed.

Then just replace %1 with the url to get the actual command you need.

-- 
Duncan Booth   http://kupuguy.blogspot.com


From gabriel.rossetti at arimaz.com  Mon May 26 08:31:42 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 14:31:42 +0200
Subject: b64encode and unicode problem
In-Reply-To: <483A9437.4010505@mxm.dk>
References: <483A8D9F.3080104@arimaz.com> <483A9437.4010505@mxm.dk>
Message-ID: <483AADAE.1060509@arimaz.com>

Max M wrote:
> Gabriel Rossetti skrev:
>> Hello everyone,
>>
>> I am trying to encode a string using b4encode and I get the following 
>> error :
>>
>>  >>> b64encode(u"Salut Pierre, comment ?a va?")
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in <module>
>>  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>>    encoded = binascii.b2a_base64(s)[:-1]
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
>> position 22: ordinal not in range(128)
>>
>> If I remove the "u" infront of the string, it works. The problem is 
>> that I in my program, the string is given to me un unicode/utf-8. I 
>> tried several things, but I still get it, How can I get it to work, 
>> anybody have any idea?
>
> I have written about it here:
>
> http://mxm-mad-science.blogspot.com/2008/03/python-unicode-lessons-from-school-of.html 
>
>
> The reason/solution for your problem is mentioned somewhere below the 
> middle.
>
>
Thank you, it's a bit clearer now, I thought unicode and utf8 were 
synonyms, but  from what I understood unicode is sort of like bytecode, 
and utf8/latin1/etc would be like a asm dialect that bytecode would be 
translated to.

Thank you,
Gabriel

-- 
Arimaz SA
Av. du 24 Janvier 11
Ateliers de la Ville de Renens, Atelier 5
1020 Renens, Switzerland
www.arimaz.com
www.mydeskfriend.com
Mob: +41-(0)79-539-0069
Tel: +41-(0)21-566-7343



From martin at v.loewis.de  Sun May 18 05:15:06 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 18 May 2008 11:15:06 +0200
Subject: morning in Python
In-Reply-To: <143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <482FF39A.5010604@v.loewis.de>

> Full day later, I think it, to emphasize state, would prioritize
> context.  The reason for the huge ramble was, believe it or not,
> namespace conflict... as though any other states around here might
> nose in.

I think the namespace conflict is rather in cities than in states.
For example, there are several cities called "Berlin", but only
one state (that I know of) is called "Mecklenburg-Vorpommern".
In some cases, prefixing helps, e.g. you don't call it "York"
when that already exists, but "New York".

There is also the issue of aliases. Some call it Moscow, some Moskau,
when it is really called ??????. Of course, the same issue exists
for states: some call it Kalifornien, others California.

> And thanks to 'inhahe' for coming back with the
> question.  ...Which would explain next move to 'prioritize context'.
> Context is a high priority for people.

I'd rather say that priority is a high context.

Regards,
Martin


From webmail.hce at gmail.com  Fri May  9 00:42:21 2008
From: webmail.hce at gmail.com (hce)
Date: Fri, 9 May 2008 14:42:21 +1000
Subject: Python script freezed on Window DOS terminal
Message-ID: <95455e980805082142w7891868fy89da4c0be6659246@mail.gmail.com>

Hi,

I am running Python and a script on XP DOS terminal, the script
build.py printed out messages on the Terminal, then asked for an input
of numbers. But, I pressed a key, nothing came in DOS terminal,
Eventually, no key active and seem the DOS terminal is freezed. I
could not even terminate the terminal by Ctrl-C or Ctrl-D. The same
script was running fine on linux or Cygwin terminals. Any thoughts
what was the problem?

Thank you.

Kind Regards.

Jim


From sven.siegmund at gmail.com  Sun May 11 18:40:13 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:40:13 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
	<482774b4$0$11617$9b622d9e@news.freenet.de>
Message-ID: <4077ed44-1341-4075-9560-a9e8a06b319d@r66g2000hsg.googlegroups.com>

> No, it's now a known bug (at least I don't know it). Whether or not it
> gets fixed might depend on whether or not it gets reported to
> bugs.python.org.

Ok, I'll repost it there.

S.


From wuwei23 at gmail.com  Thu May 29 09:24:34 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 06:24:34 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
Message-ID: <138c1ce9-80b1-4123-b88d-364055f63d78@i18g2000prn.googlegroups.com>

On May 29, 11:09 pm, TYR <a.harrow... at gmail.com> wrote:
> I'm doing some data normalisation, which involves data from a Web site
> being extracted with BeautifulSoup, cleaned up with a regex, then
> having the current year as returned by time()'s tm_year attribute
> inserted, before the data is concatenated with string.join() and fed
> to time.strptime().
>
> Here's some code:
> timeinput = re.split('[\s:-]', rawtime)
> print timeinput #trace statement
> print year #trace statement
> t = timeinput.insert(2, year)
> print t #trace statement
> t1 = string.join(t, '')
> timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> year is a Unicode string; so is the data in rawtime (BeautifulSoup
> gives you Unicode, dammit). And here's the output:
>
> [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> 2008 (OK, so the year is a year)
> None (...but what's this?)
> Traceback (most recent call last):
>   File "bothv2.py", line 71, in <module>
>     t1 = string.join(t, '')
>   File "/usr/lib/python2.5/string.py", line 316, in join
>     return sep.join(words)
> TypeError

list.insert modifies the list in-place:

>>> l = [1,2,3]
>>> l.insert(2,4)
>>> l
[1, 2, 4, 3]

It also returns None, which is what you're assigning to 't' and then
trying to join.

Replace your usage of 't' with 'timeinput' and it should work.


From vivainio at gmail.com  Sun May 18 11:54:38 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 18 May 2008 15:54:38 GMT
Subject: Shelve or pickle module
References: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>
	<mailman.1299.1211085964.12834.python-list@python.org>
Message-ID: <y7674ngk.fsf@gmail.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:


> A shelve is just a persistent dictionary that uses pickle to store
> the objects.  If you want to store one or a few objects, using
> pickle directly may be easier.  Any problem you may have with pickle
> (nonpickleable objects, security risks) will happen with shelve too.

Shameless plug warning!

If you want to store pickles "directly" in a directory with
shelve-like dict API, you may also be interested in my "pickleshare"
module:

http://pypi.python.org/pypi/pickleshare/0.3



From d3vvnull at gmail.com  Thu May  8 07:52:09 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 06:52:09 -0500
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <4822E485.4040107@aim.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
	<4822E485.4040107@aim.com>
Message-ID: <170543c70805080452m5c94d480h2a23f0af62180604@mail.gmail.com>

For me, the difference is #!python doesn't work for me.  I get a bad
interpreter error.

On Thu, May 8, 2008 at 6:31 AM, Brian Vanderburg II <
BrianVanderburg2 at aim.com> wrote:

> This is sort of related, but I'm wondering what is different between
> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same
> thing, since an absolute path is not specified, find 'python' from the PATH
> environment,  I don't really know.
>
> Brian Vanderburg II
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From george.sakkis at gmail.com  Sun May  4 02:35:05 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 23:35:05 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
Message-ID: <7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>

On May 4, 2:04?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallo... at invalid.com> escribi?:
>
>
>
> > Hello,
>
> > I made a function that takes a word list (one word per line, text file)
> > and searches for all the words in the list that are 'shifts' of
> > eachother. ?'abc' shifted 1 is 'bcd'
>
> > Please take a look and tell me if this is a viable solution.
>
> > ?def shift(word, amt):
> > ? ?ans = ''
> > ? ?for letter in word:
> > ? ? ? ? ? ?ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> > ? ?return ans
>
> > def fileshift(x):
> > ? ?fin = open(x)
> > ? ?d = {}
> > ? ?for line in fin:
> > ? ? ? ? ? ?d[line.strip()] = [1]
> > ? ? ? ? ? ?for i in range(1, 26):
> > ? ? ? ? ? ? ? ? ? ?ite = shift(line.strip(), i)
> > ? ? ? ? ? ? ? ? ? ?if ite in d:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?print ite
>
> > Any tips/suggestions/critiques greatly appreciated.. I'm trying to
> > teach myself Python (and still beginning) and would love any helpful
> > info.
>
> First, looking at the code, you're evaluating line.strip() a lot of times; I'd avoid it.
> Looks like you're using a dictionary just for the keys - the set type is more adequate here (seehttp://docs.python.org/lib/types-set.html). In any case, I'd use a value like None instead of [1]
> But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.


A faster algorithm is to create a 'key' for each word, defined as the
tuple of ord differences (modulo 26) of consecutive characters. E.g.
the key of 'acf' is (2,3); 'c' is 2 positions after 'a' and 'f' 3
positions after 'c'. Shifted words (and only these) have the same key.
Here's a straightforward implementation that generates all the lists
of equally-shifted words:

from collections import defaultdict

def iter_shifted(words):
    key2shifted = defaultdict(list)
    for word in words:
        ords = map(ord,word)
        key = tuple((ords[i]-ords[i-1]) % 26
                    for i in xrange(1,len(ords)))
        key2shifted[key].append(word)
    for shifted in key2shifted.itervalues():
        if len(shifted) > 1:
            yield shifted

if __name__ == '__main__':
    words = 'abc bef jas cba cde zab azy hkl'.split()
    for shifted in iter_shifted(words):
        print shifted

# *** output ***
#['bef', 'hkl']
#['abc', 'cde', 'zab']
#['cba', 'azy']


From jurgenex at hotmail.com  Thu May  8 02:05:20 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Thu, 08 May 2008 06:05:20 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
Message-ID: <fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>

George Neuner <gneuner2/@/comcast.net> wrote:
>On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
><xahlee at gmail.com> wrote:

         +-------------------+             .:\:\:/:/:.
         |   PLEASE DO NOT   |            :.:\:\:/:/:.:
         |  FEED THE TROLLS  |           :=.' -   - '.=:
         |                   |           '=(\ 9   9 /)='
         |   Thank you,      |              (  (_)  )
         |       Management  |              /`-vvv-'\
         +-------------------+             /         \
                 |  |        @@@          / /|,,,,,|\ \
                 |  |        @@@         /_//  /^\  \\_\
   @x@@x@        |  |         |/         WW(  (   )  )WW
   \||||/        |  |        \|           __\,,\ /,,/__
    \||/         |  |         |      jgs (______Y______)
/\/\/\/\/\/\/\/\//\/\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
==============================================================

jue


From castironpi at gmail.com  Thu May 15 10:04:13 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:04:13 -0700 (PDT)
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
	<wihr6c33j1s.fsf@panix5.panix.com>
Message-ID: <16f79f5a-ef95-41ce-a58d-3b513e201d35@56g2000hsm.googlegroups.com>

On May 15, 6:26?am, ro... at panix.com (R. Bernstein) wrote:
> "Alan J. Salmoni" <salm... at gmail.com> writes:
>
> > I'm not sure if this is exactly what you're after, but try looking
> > into the 'code' module.
>
> > It's fairly easy to make an interactive interpreter that runs within
> > your program. If you import your programs variables into
> > __main__.__dict__, you can have access to them which can be funky. You
> > can even override the showtraceback method to catch various exceptions
> > and do daft things like adding new methods to strings. I guess it
> > would even be possible to have the commands compared to a list of
> > commands and keywords to build a restricted interpreter, though how
> > secure this would be against a determined attack is another matter.
>
> > Alan
>
> I think this (largely) does the trick. Thanks!
>
> I'm not sure about how to deal with globals yet which should come from
> a stackframe f_globals. It might be possible to save and restore
> __main__.__dict__ before and after the call to interact(). Probably
> would have been cooler to design interact() to take a globals
> parameter, same as eval does.
>
>
>
>
>
> > On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
> >> The next release of pydb will have the ability to go into ipython from
> >> inside the debugger. Sort of like how in ruby-debug you can go into
> >> irb :-)
>
> >> For ipython, this can be done pretty simply; there is an IPShellEmbed
> >> method which returns something you can call. But how could one do the
> >> same for the stock python interactive shell?
>
> >> To take this out of the realm of debugging. What you want to do is to
> >> write a python program that goes into the python interactive shell -
> >> without having to write your own a read/eval loop and deal with
> >> readline, continuation lines, etc.
>
> >> The solution should also allow
> >> ?- variables/methods in the calling PYthon program to be visible
> >> ? ?in the shell
> >> ?- variables set in the interactive (sub) shell should persist after the shell
> >> ? ?terminates, although this is a weaker requirement. POSIX subshells
> >> ? ?for example *don't* work this way.
>
> >> There has been much written about how to embed Python from C, so I
> >> suppose this may offer one way. And at worst, I could write
> >> a C extension which follows how C Python does this for itself.
>
> >> But is there a simpler way?
>
> >> Thanks.- Hide quoted text -
>
> - Show quoted text -

One threat is malicious code; sorry for this.


From vivainio at gmail.com  Thu May 29 15:28:34 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 29 May 2008 19:28:34 GMT
Subject: ANN: IPython 0.8.3 is out
Message-ID: <8763swlxjx.fsf@gmail.com>

Hi all,

The IPython team is happy to release version 0.8.3, with lots of new
enhancements as well as many bug fixes, and updated documentation
that has been long in the coming.

We hope you all enjoy it, and please report any problems as usual.


WHAT is IPython?
----------------

1. An interactive shell superior to Python's default. IPython has many
features for object introspection, system shell access, and its own special
command system for adding functionality when working interactively.

2. An embeddable, ready to use interpreter for your own programs. IPython can
be started with a single call from inside another program, providing access to
the current namespace.

3. A flexible framework which can be used as the base environment for other
systems with Python as the underlying language.

4. A shell for interactive usage of threaded graphical toolkits. IPython has
support for interactive, non-blocking control of GTK, Qt and WX applications
via special threading flags. The normal Python shell can only do this for
Tkinter applications.


Where to get it
---------------

IPython's homepage is at:

http://ipython.scipy.org

and downloads are at:

http://ipython.scipy.org/dist

We've provided:

      - Source download (.tar.gz)
      - A Python Egg (http://peak.telecommunity.com/DevCenter/PythonEggs).
      - A native win32 installer. 
      - rpm's

Note that win32 users also need to get pyreadline, available at the same
download site (http://ipython.scipy.org/dist). You should also read of 
additional considerations at http://ipython.scipy.org/moin/IpythonOnWindows

We note that IPython is now officially part of most major Linux and BSD
distributions, so packages for this version should be coming soon, as the
respective maintainers have the time to follow their packaging procedures.
Many thanks to Jack Moffit, Norbert Tretkowski, Andrea Riciputi, Dryice Liu
and Will Maier for the packaging work, which helps users get IPython more
conveniently.

Many thanks to Enthought for their continued hosting support for IPython.


Release notes
-------------

See 

http://ipython.scipy.org/moin/WhatsNew083

for notable new features in this release.


Enjoy, and as usual please report any problems.


The IPython team.


From duncan.booth at invalid.invalid  Tue May 20 06:04:17 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 10:04:17 GMT
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
Message-ID: <Xns9AA470833CCA8duncanbooth@127.0.0.1>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:

>>>> a = 'this is longer'
>>>> b = 'this is longer'
>>>> a == b
> True
>>>> a is b
> False
>>>> 
> 
> In the above example, Python has created only one string called
> 'hello' and both x and y reference it. However, 'this is longer' is
> two completely different objects. 

That is true when run interactively, but the behaviour changes again if you 
run it as a script:

C:\Temp>type t.py
a = 'this is longer'
b = 'this is longer'
print a is b

C:\Temp>t
True

In short, two equal strings may or may not be identical and any code which 
makes assumptions based on observed behaviour is broken. If you want to be 
able to test identity on strings safely then use the 'intern()' builtin to 
get repeatable behaviour.

-- 
Duncan Booth http://kupuguy.blogspot.com


From skanemupp at yahoo.se  Fri May  2 11:55:45 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 08:55:45 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
Message-ID: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>

if pygame.key.get_pressed[K_a]:
            print "Muppet"

K_a is not defined.


but yes it is. why do i get this error?

this works:
if pygame.key.get_pressed():
        print "donkey"


From wgumgfy at gmail.com  Fri May  9 02:47:46 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 23:47:46 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<9vo724prqd0etqlraapsv8e3j6bcigh5ea@4ax.com>
Message-ID: <68iacjF2sq5gcU1@mid.individual.net>

J?rgen Exner wrote:
> "Waylen Gumbal" <wgumgfy at gmail.com> wrote:
> > Sherman Pendley wrote:
> > > kodifik at eurogaran.com writes:
> > > >
> > > > > PLEASE DO NOT | :.:\:\:/:/:.:
> > > > > FEED THE TROLLS | :=.' - - '.=:
> > Not everyone follows language-neutral groups (such as
> > comp,programming as you pointed out), so you actually reach more
> > people by cross posting.
>
> You seem so have failed to grasp the concept of why Usenet is divided
> into separate groups in the first place.

No, not really. You keep group specific content in the applicable group 
or groups only. But are there not times where content overlaps the 
topics of multiple groups and to get maximum feedback, post to all 
applicable groups (the keyword being "applicable") ?

-- 
wg 




From zxo102 at gmail.com  Sat May 24 18:36:50 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 15:36:50 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01" in 
	python coding?
Message-ID: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>

Hi,
   how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
"\xED\x6F\x3C\x01" in python coding?
When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
the error information : invalid \x escape.
   Thanks.

ouyang


From inhahe at gmail.com  Tue May  6 09:35:05 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 6 May 2008 09:35:05 -0400
Subject: select.poll() and WSAPoll
References: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
	<mailman.648.1210078345.12834.python-list@python.org>
Message-ID: <q7ZTj.71501$vr3.59121@bignews2.bellsouth.net>


> I don't think we can officially support WPAPoll since Python 2.6 is
> suppose to run on Windows 2000 and XP, too.
>
> Christian
>

Oh, yeah, I was wondering about that, since there aren't separate 
distributions of Python for Vista vs. XP etc.  But I wonder if Python could 
just give an attribute error, or perhaps some other error, for select.poll 
if it's not running on Vista, perhaps some kind of run-time detection if 
it's vista or if wsapoll is available?  or even an installation time thing? 
Since there's nothing promising that select.poll will work on windows 
anyway.  or does it just not work like that? :e

although a third party module would be nice too (if anyone out there has 
vista..:)




From wizzardx at gmail.com  Sun May  4 13:33:49 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 19:33:49 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
Message-ID: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>

On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> I can grab the image,  I need a way of grab the region size with the mouse,
> a easy way of the user select a region of the image to analyze, something
> like the  "Rectangle selection tool" of gimp.
>

I assume what you want to do is allow the user to drag the mouse
across your desktop, and your program, running in the background,
picks this up? As opposed to the user making a rectangular selection
entirely within your app.

I think the simplest way to do this is to capture the entire screen,
then show it as an image on a window covering the entire screen (eg:
fullscreen mode, or a regular window without decorations).  Then
listen for mouse events. There should be a way to show the 'rectangle
elastic band' at the same time. Otherwise just draw a rectangle
between where the user first clicked and where the mouse is now (until
they release the mouse button).

Another way would be to listen to all events sent through X, and act
based on the mouse events. VNC does something similar.

A good starting point would be the Python xlib libraries:

http://python-xlib.sourceforge.net/

David.


From mensanator at aol.com  Fri May  2 13:18:20 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 10:18:20 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
Message-ID: <e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>

On May 2, 9:53?am, Michael Torrie <torr... at gmail.com> wrote:
> Shawn Milochik wrote:
> > How does one "plonk" stuff from Google Groups? Specifically, how
> > can this be done in Gmail?
>
> Set up a filter that looks for some phrase in the mail headers that
> identifies messages originating from google groups. ?Gmail's filters are
> fairly flexible. ?I'd probably just have it look for certain words.
> Look at an e-mail's source (raw view) and particularly check in the
> headers for things to filter by.

Why don't you just block all messages from Gmail?


From python at bdurham.com  Thu May  8 12:47:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 08 May 2008 12:47:47 -0400
Subject: Given a string - execute a function by the same name
In-Reply-To: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.291.1209400412.12834.python-list@python.org>
	<jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <1210265267.25069.1252128141@webmail.messagingengine.com>

Andrew,

> > I'm parsing a simple file and given a line's keyword, would like to call the equivalently named function.

> No, actually, you wouldn't :-)  Doing so means that if your programs input specification ever changes, you have to rename all of the relevant functions. Moreover, it leaves open the possibility that you might wind up calling a function you didn't intend.

I'm using Arnaud Delobelle's technique (see below) to insure that only
the appropriate methods are called. A great, practical example of a
decorator.

<snip>
functions = {}

def register(func):
    functions[func.__name__] = func
    return func

@register
def foo(): print "Foo!"

@register
def bar(): print "Bar!"

>>> functions
{'foo': <function foo at 0x6f2f0>, 'bar': <function bar at 0x6f330>}
>>> functions['bar']()
Bar!
</snip>

Thanks for your feedback,

Malcolm


From wolfgang.lipp at gmail.com  Fri May 23 15:06:01 2008
From: wolfgang.lipp at gmail.com (_wolf)
Date: Fri, 23 May 2008 12:06:01 -0700 (PDT)
Subject: matploblib communication problem, graphics question
Message-ID: <dfc54996-3bb3-419b-8cd7-212fefa8469d@b1g2000hsg.googlegroups.com>


i've had a hard time today to drill down on some infos
about matplotlib of http://matplotlib.sourceforge.net/.
this is an sf.net-managed project, its mailing lists are
managed by <shudder/> gnu mailman in a pre-1994 version.

still there is a sf.net standard forum interface, which
however denies me to post. i've set up an account on
sourceforge---not an experience i need; boarding an
intercontinental flight is swift in comparison.

but having an account on sf.net is not enough to post to
a mailing list there, so i filled out a second longish
form to subscribe to the list thru the <horrors/>
mailman interface. i had to re-enter my email address.

now what is left to me is to try writing directly to
matplotlib-users at lists.sourceforge.net and then scoop
it up on http://sourceforge.net/mailarchive/forum.php?forum_name=matplotlib-users

as it is so incredibly hard to make oneself heard on
the matplotlib list, i realized that questions from
outsiders are maybe not welcome, so i do a cross-post
to reach more audience.

i need to do some raster-image scaling and i've been
hunting hi and lo for a python library that can do that.
so far choices are (in order of perceived aptness)::

  imagemagick of old,

  pythonware.com/products/pil,

  antigrain.com,

  matplotlib,

  cairo of cairographics.org.

Cairo is definitely may favorite here. i know with
certainty that cairo is good at scaling images, as
firefox3 is using it to achieve a smoothness and
readability in scaled images that rivals the quality
of safari?s.

but i have been unable to uncover any information
about raster-image scaling in cairo---can?t be, right?
an open source project that becomes part of firefox3
and i can?t find out how to use their flagship
functionality?

so i went to matplotlib. i now have these methods to
open image files with matplotlib::

  def get_image_jpg():
    import Image
    from pylab import *
    import numpy
    print dir( numpy )
    from numpy import int8, uint8
    # these lines are incredible -- just open that damn jpg. can be as
simple as `load(route)` -- ALL the pertinent
    # information well be in time derived from the route and the
routed resource structure (the router, and the
    # routee). pls someone giveme a `MATPLOBLIB.read()`, a
`MATPLOBLIB.load()`, or a `MATPLOBLIB.get()` already.
    image = Image.open( image_locator )
    rgb = fromstring( image.tostring(), uint8 ).astype( float ) /
255.0
    # rgb = resize( rgb,( image.size[ 1 ], image.size[ 0 ], 3 ) )
    rgb = resize( rgb,( 100, 150, 3 ) )
    imshow( rgb, interpolation = 'nearest' )
    axis( 'off' ) # don?tdisplaytheimageaxis
    show()

  def get_image_png( image_locator ):
    from pylab import imread as _read_png
    from pylab import imshow as _show_image
    from pylab import gray
    from pylab import mean
    a = imread( image_locator )
    #generates a RGB image, so do
    aa=mean(a,2) # to get a 2-D array
    imshow(aa)
    gray()

quite incredible, right? it can somehow be done, but
chances are you drown in an avalanche of boiler plate.
and sorry for the shoddy code, i copied it from their
website.

so they use pil to open an image file. pil?s image
scaling is 1994, and the package is hardly maintained
and not open. yuck. whenever you have a question
about imaging in python people say ?pill? like they
have swallowed one.

let?s face it, pil is a bad choice to do graphics.
here i did install pil, because matplotlib seemed to
be basically handling raster-images and image
transformations.

the matplotlib people have the nerve to put a short
doc to their root namespace items, as are, `axhspan`,
`cla`, `gcf`, and such more. this interface is
hardly usable. it shouldn?t be that hard to open an
image file in an image manipulation library. nobody
wants to maintain that kind of sphpaghetti.

i haven?t been succesful so far to find out how to
scale an image in cairo or matlotlib, or an other
alternative. please don?t sugggest doing it with
pil or imagemagick, i won?t answer.

is there any coherent python imaging interest group
out there? can i do it with pyglet maybe?

cheers & ~flow






From cjw at ncf.ca  Sat May 17 19:51:42 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 17 May 2008 19:51:42 -0400
Subject: help compiling Python on vs 2008!
In-Reply-To: <QZFXj.6721$255.5738@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
Message-ID: <g0nr2j$8do$1@theodyn.ncf.ca>

inhahe wrote:
> "Christian Heimes" <lists at cheimes.de> wrote in message 
> news:mailman.1270.1211029209.12834.python-list at python.org...
>> inhahe schrieb:
>>> what is going on here, and how do I compile these external libraries?
>> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
>> supported. Some extensions don't compile under VS 9.0
>>
>> Christian
>>
> 
> I just installed Visual Studio 8 and tried compling and I bgot the same 
> problem.  hope this isn't a redundant post. i don't know if 
> pyhon-list at python.org reposts here.
> 
> 
You might consider working with Python 
2.6, which does compile with Visual 
Studio C++ 2008 and running the test 
(Tools\Buildbot\rt.bat) produces very 
few errors.  Just remember that 2.6 is 
tsill at the alpha stage of development.

Colin W.


From gandalf at shopzeus.com  Wed May 21 09:46:39 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 15:46:39 +0200
Subject: problem with import / namespace
In-Reply-To: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
Message-ID: <483427BF.6030805@shopzeus.com>

ohad frand wrote:
> Hi
> I have a problem that the solution to it must be very simple but i 
> couldnt fint it's answer in the internet so far (i searched for couple 
> of days)
> the problme is as follows:
>
> i have two directories e.g. "\\1" and "\\2"
> in each directory i have two files with the same names e.g. "tmp1.py" 
> and "tmp2.py"

So this is what you have:

/1/tmp1.py
/1/tmp2.py
/2/tmp1.py
/2/tmp2.py

> each tmp2.py file imports tmp1 from its same directory (import tmp1) - 
> thats the problem
> if i execute one file (\\1\tmp2.py) than the execution is ok
> but when i try after that to execute the second file (\\2\tmp2.py) 
> than the tmp1 file from the wrong directory ( - directory 1 in this 
> case) is imported instead.

When you try to import a module, python starts to search for it. The was 
it does the search is very well defined. It mostly depends on the 
current directory and sys.path. You can read more about this here:

http://docs.python.org/tut/node8.html#searchPath

This is very basic thing - you should read and go through the tutorial 
before asking questions like this. :-)

> i tried many things to try to solve it, i removed the previous path 
> from sys.path and added the new one, i tried to change current working 
> directory with os.chdir()
> I tried to delete from locals and from globals the name tmp1 before 
> running the second file but nothing worked.
> please help
The problem is still not well defined. Python works as expected and 
documented, but apparently you do not know how to import 1/tmp2.py from 
2/tmp1.py.  There are several ways to do it, and we cannot tell which 
one is correct. It depends on what are these modules for.

Here are the solution that you would use (most likely) as a beginner:


#1 first, rename your "1" and "2" directories to "one" and "two". If you 
are creating a package with modules, then you have to define the 
package's name with its directory. Since identifiers cannot begin with 
digits in Python, you need to use an identifier-like name for your 
subdirs. It is a good idea anyway. A package name called "1" would tell 
nothing about what it does?
#2 place your main application in /app/app.py
#3 create /app/one/__init__.py and /app/two/__init__.py files (they can 
be empty)
- inside your app.py file either make sure that the current dir is /app, 
or insert /app in the first place in sys.path


Then for example, inside two/tmp1.py you can do this:


import one.tmp1
import one.tmp2
import two.tmp1

one.tmp1.somefunc()
two.tmp1.somefunc()


You got the idea.

    Laszlo




From ganeshborse at gmail.com  Thu May  1 23:26:38 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Thu, 1 May 2008 20:26:38 -0700 (PDT)
Subject: how to pass C++ object to another C++ function via Python 
	function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
Message-ID: <136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>

On Apr 22, 7:54?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
> If you have a C function that receives a PyCObject, just include the ?
> relevant headers (cobject.h) and you can retrieve the original pointer ?
> using PyCObject_AsVoidPtr:
>
> void foo(PyObject *pyobj)
> {
> ? ?TOriginalType *porig;
> ? ?porig = (TOriginalType *)PyCObject_AsVoidPtr(pyobj);
> ? ?// do something with porig
> }
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

This works. But only once, means if I try to use this object second
time in Python function it causes crash.

What I am doing in my program is that I am putting STL map in a
structure & passing that structure as object to a Python function
alongwith other agurments of that Python function. This briefly as
below:

// In pyinterface.h file:---
typedef hash_map<char*,int> Elements;
typedef hash_map<char*,Elements*,StringHash,eqstr>
PerExchGroupsElementsTable;
typedef struct capsule {
        PerExchGroupsElementsTable* refgrps;
} *pcapsule;

// In pyinterface.cpp file:---
numvars = // value set depending on number of variables of that python
function
PyObject *pTuple = PyTuple_New(numvars);

// Set variables as below:
for(nCtr = 0; nCtr < numvars; nCtr++){
     slot = prul->pVarLst[nCtr].slot;
     ndtyp = ordvars[slot].dtype;
     switch(ndtyp){
       case(INT_T):
 
PyTuple_SetItem(pTuple,nCtr,PyInt_FromLong(ordvars[slot].nvalue));
           break;
       case(FLOAT_T):
 
PyTuple_SetItem(pTuple,nCtr,PyFloat_FromDouble(ordvars[slot].fvalue));
           break;
       case(STRING_T):
 
PyTuple_SetItem(pTuple,nCtr,PyString_FromString(ordvars[slot].cvalue));
           break;
       default:
           printf("\nUnknown data type [%d] for %s\n",ndtyp,prul-
>pVarLst[nCtr].var);
           bUnknownDataType = true;
           break;
     }
     if(bUnknownDataType){
        ret = -1;
        break;
     }
}

// Then set the C++ object as below:
if(ret == 0){
    capsule grpob;
    if(pGroups){
      grpob.refgrps = pGroups; // pGroups is pointer to
PerExchGroupsElementsTable map & is global.
      int ret = PyTuple_SetItem(pTuple,
(numvars-1),PyCObject_FromVoidPtr((void *)&grpob, NULL));
    }
    PyObject *pResult = PyObject_CallObject(pfunc,pTuple);
    if(PyErr_Occurred()){
       printf("error occured in PyObject_CallObject for %s\n",prul-
>pyobj.szPyRouteName);
       PyErr_Print();
    } else {
        printf("Python function passed, use its result for other
purposes as designed\n");
    }
    Py_XDECREF(pResult);
    Py_XDECREF(pTuple);
}

//---------- My Pythong module & functions in it -------------------
//PyObject* pfunc is a Python function which I compile dynamically &
add to my Python module as below:
// One of such dynamically compiled function is as below:
char pyfunction[]=\
"def TSE581(t22,t52,t1012,ob):
       if(co1(ob,t22,\"TSE_FUTURE_GRP\") and
like1(ob,t52,\"TSE_SECID_LST2\")):\n\
          print \"result is pass\"\n\
          return 1\n\
       else:\n\
          print \"result is fail\"\n\
          return 0\n";

// function parameter "ob" in this function definition is the one
which Im passing as CObject.

    PyObject *result = NULL;
    result =
PyRun_String(pyfunction,Py_file_input,_pPyDictionary,_pPyDictionary);
    if(PyErr_Occurred() || result == NULL){
        printf("Failed to compile function [%s]\n",func);
        PyErr_Print();
        return;
    }
    Py_XDECREF(result);
    result = NULL;
    PyObject *ptr = PyObject_GetAttrString(_pPyModule,fname);
    if(PyErr_Occurred() || *ptr == NULL){
        printf("PyObject_GetAttrString failed:%s",fname);
        return;
    }
    if(!PyCallable_Check(*ptr)){
       printf("%s not a callable Python code\n",fname);
       Py_XDECREF(*ptr);
       *ptr = NULL;
       return;
    }

// I've created dynamically loadble Python module & multiple functions
similar to above gets added dynamically to this module.
// Module has functions "co1" & "like1" in module's .cpp file. These
functions then use CObject - the struct capsule & map pointer in it.
static PyObject* merorderrouter_co1(PyObject* self, PyObject* args)
{
    printf("Contains function\n");
    int ret=0;
    char *arg1=NULL, *arg2=NULL;
    PyObject* voidcap=NULL;
    if(!PyArg_ParseTuple(args, "Oss", &voidcap,&arg1,&arg2)){
       printf("failed to get args\n");
       if(PyErr_Occurred())
         PyErr_Print();
       return(PyInt_FromLong(ret));
    }
    printf("key=%s, grpname=[%s]\n",arg1,arg2);
    if(voidcap && PyCObject_Check(voidcap))
       printf("valid Py-C-Object\n");
    else
       printf("NOT a valid Py-C-Object\n");
    pcapsule pobj = (pcapsule)PyCObject_AsVoidPtr(voidcap);
    if(pobj){
       PerExchGroupsElementsTable grpmap = *pobj->refgrps;
       if(grpmap.count(arg2)){
         PerExchGroupsElementsTable::iterator grpmi =
grpmap.find(arg2);
         Elements grpelems = *(Elements*)grpmi->second;
         Elements::iterator ei = grpelems.find(arg1);
         if(ei != grpelems.end()){
            printf("has elm.\n");
            ret=1;
         } else {
            printf("no elm.\n");
            ret=0;
         }
       }
    } else {
          printf("pcapsule object is null from PyCObject_AsVoidPtr
\n");
          if(PyErr_Occurred())
            PyErr_Print();
    }
    printf("------- co returning.....\n");
    return PyInt_FromLong(ret);
}
//=======================================================

What happens is that when Python function TSE581 gets called from my C
Program via PyObject_CallObject (as shown at top of this post), co1
function works fine & can access the map pointer properly.
But when next function like1 gets called, crash happens.

My queries are & things on which I need help are:
1) Is there anything wrong I am doing when I am passing the C-Object
from my C++ code->Python -> C++ code again?
2) Am I missing to increase or decrease the reference count somewhere.
3) I dont want map pointer to be ever freed because it is Process
level data structure & requried at every execution of these Python
functions. How do I avoid its cleanup when it gets passed to Python &
Python cleans up those objects.

If want to see my Python module & the CPP code using it, I can send
all my source code to you.
Please help.


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:23:43 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:23:43 -0400
Subject: save dictionary for later use?
In-Reply-To: <ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <PWmXj.46797$3v1.36691@bignews3.bellsouth.net>

globalrev wrote:

> pickle.dumps(mg)
> pickle.load(mg)
> 
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

The 'loads' and 'dumps' methods use strings:

 >>> import pickle
 >>> d = {"this": 42, "that": 101, "other": 17}
 >>> s = pickle.dumps(d)
 >>> s
"(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
 >>> pickle.loads(s)
{'this': 42, 'other': 17, 'that': 101}

If you want to store to / restore from file, use 'dump' and 'load':

# write to file 'out'...
 >>> f = open("out")
 >>> f = open("out", "wb")
 >>> pickle.dump(d, f)
 >>> f.close()

# restore it later
 >>> g = open("out", "rb")
 >>> e = pickle.load(g)
 >>> g.close()
 >>> e
{'this': 42, 'other': 17, 'that': 101}

Also see http://docs.python.org/lib/pickle-example.html.

Hope this helps!

--Hans


From p5secr2 at uni-jena.de  Mon May 19 10:30:53 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:30:53 +0200
Subject: scope of optional arguments
Message-ID: <g0s2v3$fa6$01$1@news.t-online.com>

If I call

print walk([1,2,3], [])
print walk([5,6,7])

I get

[1, 2, 3]
[4, 5, 6]

but when I call

print walk([1,2,3])
print walk([5,6,7])

I get

[1, 2, 3]
[1, 2, 3, 4, 5, 6]

at stdout, where

def walk(seq, result = []):
  for item in seq:
    result.append(item)
  return result

Does that mean that the scope of optional arguments is global if they aren't 
used and local if they are (or am I missing something here)?

Regards,
CS 




From grante at visi.com  Wed May  7 12:24:40 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 07 May 2008 11:24:40 -0500
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <hJKdnXs_Bf1VSrzVnZ2dnUVZ_tvinZ2d@visi>

On 2008-05-07, parag_paul at hotmail.com <parag_paul at hotmail.com> wrote:

> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax, I need to understand what could be
> the prupose of another scripting language

Python is a general purpose programming language like Java,
Smalltalk, Pascal, etc.

Its purpose is to allow a user to quickly write readable and
easily maintained programs.

> Cna you please help me with this,

Only you know whether/why you need to learn something.

> Is there a possibilty to work on bigger projects with Python

Yes.

-- 
Grant Edwards                   grante             Yow! Now I am depressed ...
                                  at               
                               visi.com            


From bockman at virgilio.it  Sun May 25 03:05:16 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 25 May 2008 09:05:16 +0200
Subject: finding icons for Apps
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <pan.2008.05.25.07.05.16.388806@virgilio.it>

On Sat, 24 May 2008 21:42:57 -0700, Sanoski wrote:

> This might be a dumb question. I don't know. I'm new to all this. How
> do you find icons for your programs? All GUI applications have cool
> icons that represent various things. For instance, to save is often
> represented as a disk, etc. You know, the small little picture
> references that give meaning to the phrase 'Graphical User Interface'.
> But I'm not a graphics artist! Drawing is simply one talent that
> skipped me completely. Where can I find icons to use with my programs?
> 

Many GUI toolkit ( like wx and gtk ) have a standard stock of icons for
common tasks ( load, save, ok, cancel, ...). 

Ciao
----
FB


From castironpi at gmail.com  Mon May 12 01:30:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 22:30:58 -0700 (PDT)
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
	<h10f24p4a00pmjbe21m70u0g0gppc2e6fj@4ax.com>
Message-ID: <6b70f4c2-1a05-40e6-bec3-15ac7dd51d21@m73g2000hsh.googlegroups.com>

On May 11, 6:26?pm, Tim Roberts <t... at probo.com> wrote:
> wxPytho... at gmail.com wrote:
>
> >If you are in the interactive prompt of the Python interpreter and you
> >do this
>
> >print """Testing\""" ? or ? print '''Testing\'''
>
> >you get three dots [...] as if Python expects a code block.
>
> ...which it does.
>
> >If you
> >press Enter, you get three dots again, and again, and again... You
> >can't get out of the code block with pressing the Enter key; you have
> >to press Ctrl+Z (if you're in Linux) in order to get out of that code
> >block,
>
> No, you don't. ?You can also enter """ or ''' to properly close the quote.
>
> >If you do
>
> >print "Testing\" ? or ? print 'Testing\'
>
> >you get an error, but not of you use the triple quotes. Is that a bug
> >in the interpreter perhaps?
>
> As a general rule, when you are just beginning to learn some product, it is
> safe to assume that anything you see as a bug in the product is almost
> certainly a flaw in your understanding of the product.
> --
> Tim Roberts, t... at probo.com
> Providenza & Boekelheide, Inc.

I hold further, it is more profitable, unless you can change it.


From bj_666 at gmx.net  Wed May 28 06:03:02 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 May 2008 10:03:02 GMT
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
Message-ID: <6a4oumF3464loU1@mid.uni-berlin.de>

On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:

> Dennis Lee Bieber, the ghost:
>> I'd have to wonder why so many recursive calls?
> 
> Why not?

Because of the recursion limit of course.  And function call overhead in
Python is quite high compared to an iterative approach.

Ciao,
	Marc 'BlackJack' Rintsch


From daveparker at flamingthunder.com  Tue May 13 12:20:26 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:20:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
Message-ID: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>

> 5-10 times faster for what kind of code?

Mostly numerical analysis and CGI scripting.  All of Flaming Thunder's
library code is in assembly language, and Flaming Thunder creates
statically-linked pure syscall CGI scripts.

> I don't see anything that resembles OO features of python, ...

True.  But in Python, you don't see statically-linked pure-syscall CGI
scripts being cross-compiled under Windows for ftp'ing up to a Linux
server.  And you don't see the speed of pure assembly language
libraries.  And I'll be willing to bet that Flaming Thunder will have
OO features similar to Python before Python has the features that
Flaming Thunder already does.

For many people, being 5 to 10 times faster at numerical analysis and
CGI scripting is reason enough to pay $19 per year.  But maybe for
other people, having slow, inefficient programs and websites is
acceptable.

> And what is really expensive is brain-cycles, not cpu-cycles.

Depends on whether you're the programmer, or the customer.  I've found
that customers prefer products that are 5 to 10 times faster, instead
of products that were easy for the developer.

And I disagree that Flaming Thunder requires more brain-cycles.
Because it's based on leveraging existing English and math fluency
(which was one of the original goals of Python, was it not?), I think
that Flaming Thunder requires fewer brain-cycles because fewer brains
cells have to be devoted to memorizing language peculiarities.

> Let alone it is
> very much a question of view-point if two different looping constructs or
> keywords are more awkward than one general looping-concept with only one
> keyword. It's a matter of taste.

Perhaps.  But if elementary school students can easily understand why
one programming language gives the answer 100 (Flaming Thunder):

  Write 10^2.

but can't understand why another programming language gives the answer
8 (Python):

  Print 10^2

then I think the comparison moves beyond a matter of taste into the
realm of measurable ease-of-use.

On May 13, 9:50?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> 5-10 times faster for what kind of code? I don't see anything that resembles
> OO features of python, let alone more advanced concepts like
> meta-programming, higher-order functions and such. Which save tremendous
> amounts of time coding. If FT grows these and *still* is 5-10 times faster,
> I'll salut you.
>
> And what is really expensive is brain-cycles, not cpu-cycles. Which above
> described features save.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> Oh *please*! Try getting nearly as feature & library complete as python is
> today - and *then* I'll point to all the akwardness of FT. Let alone it is
> very much a question of view-point if two different looping constructs or
> keywords are more awkward than one general looping-concept with only one
> keyword. It's a matter of taste.
>
> Diez



From grflanagan at gmail.com  Tue May 27 03:57:21 2008
From: grflanagan at gmail.com (Gerard Flanagan)
Date: Tue, 27 May 2008 00:57:21 -0700 (PDT)
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <e7543f55-445e-4bd9-8bc3-824329534c3c@a70g2000hsh.googlegroups.com>

On May 27, 12:39 am, Jean-Claude Neveu <jcn-france1... at pobox.com>
wrote:
> Hello,
>
> I am writing a Python program to check email using POP3. I've tried
> the sample code from python.org, and it works great. In other words,
> the code below successfully prints out my emails.
>
> import getpass, poplib, email
> M = poplib.POP3('mail.blah.com')
> M.user('username')
> M.pass_('password')
> numMessages = len(M.list()[1])
> for i in range(numMessages):
>      for j in M.retr(i+1)[1]:
>          print j
> M.quit()
>
> However, if I understand right, the Python poplib library will also
> parse the email for me so that I can iterate through the headers,
> body, etc, of each message, and use them in my program. I think the
> method I need to use is email.message_from_file, but I'm having
> difficulty getting it to work. Can anyone explain me how I would
> extend the above example to do this?
>
> I tried to do this by using in the i loop the line:
>
>         message = email.message_from_file(j)
>
> but I get the error: "AttributeError: 'str' object has no attribute 'readline'"
>
> Please forgive this very basic question. I do most of my programming
> in PHP and I'm just getting started with Python.
>
> Many thanks,
>
> J-C

Here's something I wrote when I was learning Python:

http://gflanagan.net/site/python/pagliacci/pagliacci.py.html

HTH (if you can decipher it!)

Gerard


From heikki at osafoundation.org  Fri May  2 15:41:12 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 12:41:12 -0700
Subject: Python and SOAP status
Message-ID: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>

I have started researching the Python SOAP (and web services in general)
options out there. Python 2.5 should be supported.

I used Python for some web services stuff (demo quality) a few years
back without major problems. However, it seems many of the libraries I
remember from that time have become dormant or have been explicitly
discontinued. A colleague also commented that he run into lots of
problems trying to use Python for SOAP a year ago.

What is your experience with Python SOAP, WSDL etc. libraries? What are
the good, maintained options out there right now? How is standards
compliance, how robust are the libraries, how do they interoperate with
other libraries written in other languages (I am especially interested
in interoperability with Java and PHP web services stacks).

It seems like the top 3 candidates on my list are ZSI
(http://pywebsvcs.sourceforge.net/), soaplib
(http://trac.optio.webfactional.com/) and suds
(http://trac.optio.webfactional.com/). If you have any experience in
using these, I'd very much like to hear from you.

There was quite a depressing post about ZSI's status at
http://www.kunxi.org/archives/2008/01/pythonsoap-second-encounter/.

-- 
  Heikki Toivonen


From gherron at islandtraining.com  Tue May  6 19:02:34 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 06 May 2008 16:02:34 -0700
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <4820E38A.7090903@islandtraining.com>

Michael Robertson wrote:
> I'm having trouble opening a file in linux, whose path has spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
> >>> open('./my test/test.txt')
> Exception

This works just fine for me.  No need to escape the spaces.

You haven't given us much to work with -- tell us what exception you 
get.    (Or just look at it carefully yourself.)   Whatever the problem 
is, I don't believe it has anything to do with the spaces.

Gary Herron


>
> >>> open('./my\\ test/test.txt')
> Exception

> but yet...
>
> >>> import os
> >>> os.chdir('./my test')
> >>> open('./test')
>
> works just fine.
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From pete.forman at westerngeco.com  Fri May 30 04:05:13 2008
From: pete.forman at westerngeco.com (Pete Forman)
Date: Fri, 30 May 2008 09:05:13 +0100
Subject: code of a function
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org>
	<RuG%j.37511$3j.21433@trnddc05>
	<873d04c4-c902-4ed5-8c57-8af8c037f094@c19g2000prf.googlegroups.com>
Message-ID: <tzggw72e.fsf@wgmail2.gatwick.eur.slb.com>

alex23 <wuwei23 at gmail.com> writes:

 > Which is very handy, like most of IPython.

+1 QOTW
-- 
Pete Forman                -./\.-  Disclaimer: This post is originated
WesternGeco                  -./\.-   by myself and does not represent
pete.forman at westerngeco.com    -./\.-   the opinion of Schlumberger or
http://petef.22web.net           -./\.-   WesternGeco.


From torriem at gmail.com  Fri May  9 10:38:57 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 09 May 2008 08:38:57 -0600
Subject: The del statement
In-Reply-To: <3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>
Message-ID: <48246201.1020301@gmail.com>

George Sakkis wrote:
> I think you're trying to imply that it is consistent with setting a
> value (same with getting). I guess what bugs me about "del" is that
> it's a keyword and not some universally well-known punctuation. Do you
> you feel that Python misses a "pop" keyword and respective
> expressions ?

Typically the word "pop" has a different meaning than you describe.
Most programmers think of pop in conjunction with push, for working with
FIFOs.  Normally pop would not be expected to take any arguments, or
maybe an argument of a number describing how many items to pop off of a
FIFO (stack).  Thus I don't think a pop method would be the right way to
go here.

I don't feel python misses a pop keyword because pop is already used as
methods of classes implementing stacks and FIFOs where appropriate.

> 
> (1) pop x: Remove x from the current namespace and return it.
> (2) pop x[i]: Instead of x.pop(i)
> (3) pop x.a: Equivalent to "_y=x.a; del x.a; return y"

The confusion over del does stem from it's behavior, so I can see where
you're coming from.  del doesn't delete anything; it just removes a
name.  However pop would be just as confusing in my opinion, given that
it's already associated with data structures.


From joe.p.cool at googlemail.com  Mon May 26 17:47:33 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Mon, 26 May 2008 14:47:33 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com> 
	<mailman.1588.1211765723.12834.python-list@python.org>
Message-ID: <484af5a1-4100-4782-b6dd-84d4d57337bf@e39g2000hsf.googlegroups.com>

On 26 Mai, 03:34, "Terry Reedy" <tjre... at udel.edu> wrote:
[...]
> | Please don't sell a missing feature as a philosophy.
>
> I won't if you don't claim that a feature is missing because you don't like
> its implementation. ?To most of us, replacing the nearly never used '__'
> with a keyword would be a auful change.

With "missing" I simply meant "not there".


> | Please don't tell me that encapsulation does not mean "enforced
> restriction".
>
> There are obviously degrees of enforced restriction. ?Take your TV example.
> Most users will respect a 'do not open' request by the manufacturer
> (Python's '_'.).

I program in Python quite often and I also use the '_' notation. But I
always found the inside/outside distinction very natural and
fundamental. The '_' notation is too informal and can arbitrarily be
overloaded with other meanings. I don't understand why it is so
important to avoid one keyword and paying for that by typing numerous
'_'. Underscore meaning is somewhat blurred - sometimes private,
sometimes protected. And it is line noise - like @$& in Perl.

> If you want something equivalent to epoxy embedding, design it, implement
> it, and share it (if you want). ?Perhaps one could make an Opaque extension
> class, perhaps even usable as a mixin class rather than as a single-base
> class.

Perhaps I'll give it a try - as soon as I have found out what you
mean :)


From mostro713 at gmail.com  Sat May  3 10:27:21 2008
From: mostro713 at gmail.com (mostro713 at gmail.com)
Date: Sat, 3 May 2008 07:27:21 -0700 (PDT)
Subject: Phyton module for Windows Event Viewer?
Message-ID: <0a2fdb47-cc66-4ba9-aa64-4b034b84a8a7@k13g2000hse.googlegroups.com>

Hi all,

Can someone point me in the right direction? I'm looking for a module
to monitor the Windows Event Viewer.

Thanks


From malaclypse2 at gmail.com  Thu May  8 09:24:14 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 8 May 2008 09:24:14 -0400
Subject: web client in Python Q
In-Reply-To: <DluUj.663832$us.393032@fe04.news.easynews.com>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
	<mailman.732.1210209312.12834.python-list@python.org>
	<DluUj.663832$us.393032@fe04.news.easynews.com>
Message-ID: <16651e80805080624m53ad2bc3jae2765cb78aa3a57@mail.gmail.com>

On Wed, May 7, 2008 at 11:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
> I wonder why it does not work with
>
>  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW

It looks like that is a subscription site.  That makes things more
complicated, because it means you'll need to figure out how to log in,
then probably store cookies related to your session and offer them
back up to the web server on subsequent requests.  Python has modules
that help with these things (mostly in the urllib2 module if i recall
correctly), but it's not quite as straightforward as just fetching a
URL.

I don't have time to dig up an example at the moment, but if you're
still having trouble with it, I can try to pull something together
this weekend.

-- 
Jerry


From daveparker at flamingthunder.com  Wed May 28 17:46:44 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:46:44 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
Message-ID: <4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>

On May 28, 3:19?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Kind of like how this year's program won't work on next year's
> > Python?
>
> For somebody who has admitted to have only very rudimentary knowledge of
> python that's a pretty bold statement, don't you think?

Everthing I know, I learned from Wikipedia. ;)

http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_and_compatibility

"Like Perl 6, Python 3.0 will break backward compatibility. There is
no requirement that Python 2.x code will run unmodified on Python 3.0.
There are basic changes such as changing the print statement into a
print function (so any use of the print statement will cause the
program to fail) ..."


From sjmachin at lexicon.net  Mon May 12 08:30:58 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 12 May 2008 12:30:58 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <Xns9A9C83F62CA39duncanbooth@127.0.0.1>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
Message-ID: <48283881@news.mel.dft.com.au>

Duncan Booth wrote:
> Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> 
>>>> is there a better way than my solution? is mine ok?
>>> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>>>  or str(i) for i in xrange(1, 101)]
>>>
>>> -- Ivan
>> or, more correctly, if you actually need to "print":
>>
>> sys.stdout.write('\n'.join('%s%s' % 
>>     (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
>>     or str(i) 
>>     for i in xrange(1, 101)))
> 
> I think the variant I came up with is a bit clearer:
> 
> for i in range(1,101):
> 	print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i

More than a bit clearer, IMO. How about
     print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
(or perhaps
     print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
to save looking up the precedence rules) ?


From bj_666 at gmx.net  Fri May  2 05:29:19 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 09:29:19 GMT
Subject: get number that is raised to the power of
References: <mailman.446.1209719973.12834.python-list@python.org>
Message-ID: <68057fF2r409aU3@mid.uni-berlin.de>

On Fri, 02 May 2008 19:19:07 +1000, Astan Chee wrote:

> Hi,
> Im not sure if this is more of a math question or a python question. I 
> have a variable in python:
>  >>> v = 10.0**n
> is there a way to find the value of n if i know only v aside from 
> str(v).split('+')[1] ? that seems like too much of a hack and I was 
> wondering if there was a faster way of doing it?

That hack isn't even working properly because ``str(10.0**1)`` has no '+'
in its string representation.

Solution:

n = math.log(v, 10)

Ciao,
	Marc 'BlackJack' Rintsch


From dbpokorny at gmail.com  Sat May 17 00:20:58 2008
From: dbpokorny at gmail.com (dbpokorny at gmail.com)
Date: Fri, 16 May 2008 21:20:58 -0700 (PDT)
Subject: Rpy Module
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
Message-ID: <ad4327b8-c98f-466f-90f1-347d9ce08a96@j33g2000pri.googlegroups.com>

On May 16, 3:14 pm, Mike P <michael.pearmain at tangozebra.com> wrote:
> Hi experts,
>
> I've just seen there is an R module, what i can't see easily is if you
> can / how to import other modules for R into the Rpy module
>
> Can anyone advise on this?
>
> Cheers
>
> Mike

Do you mean like this?

import rpy
rpy.r('require(MASS)')

HTH,
David


From tjreedy at udel.edu  Tue May 13 17:37:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:37:10 -0400
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0d1m4$ng9$1@ger.gmane.org>


"Rajarshi" <rajarshi.guha at gmail.com> wrote in message 
news:bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com...
| Hi, I teach an introductory programming course in Python. As part of
| the introduction I'd like to highlight the usage of Python in
| industry. The idea is to show that there are big players using Python
| for a variety of tasks. Given that the students come from a variety of
| backgrounds and are not necessarily 'hackers', I'm trying to look for
| examples with a bit of wow-factor.
|
| Is there any list with people/groups/companies using Python for
| impressive things?
|
| Any pointers would be appreciated

Besides the other comments, there was a thread about a month ago that give 
more python success stories (perhaps that was the title).





From castironpi at gmail.com  Wed May 14 07:59:15 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 04:59:15 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1043.1210676114.12834.python-list@python.org>
	<c8d3628f-8d7a-4eae-aa16-bbd8f16b54b5@u36g2000prf.googlegroups.com>
	<mdOdnfsVSIsm9LfVnZ2dnUVZ_h3inZ2d@earthlink.com>
Message-ID: <f96b3a6d-44f3-4a65-a715-caa57d88eccb@f63g2000hsf.googlegroups.com>

On May 13, 11:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 13 May 2008 04:14:16 -0700 (PDT), dannywebs... at googlemail.com
> declaimed the following in comp.lang.python:
>
> > So f is a list, rather than a file object, of which os.open would have
> > returned (my initial typo redirected the missive of this post, sorry!)
>
> ? ? ? ? Other than the facet that os.open() is low-level C file object and
> not a Python file object...
>
> ? ? ? ? What you have returned is a list of lines... Hmmm, if os.popen()
> supports .readlines() it might even support direct iteration
>
> for ln in os.popen():
> ? ? ? ? do something with the line
>
> ? ? ? ? Now the matter comes down to what each line looks like... It is NOT
> a "list" in Python terms, no matter what delimiters it has (and one of
> your examples doesn't even seem to be consistant -- [' .... ]' is not
> the same as [' .... '] )
>
> ? ? ? ? For space separated hostnames....
>
> for ln in os.popen(...): ? ? ? ?#assuming it works without a preread
> ? ? ? ? for host in ln.split():
> ? ? ? ? ? ? ? ? do something with host...
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Compositions can't have names in the singular case.


From davidreynon at gmail.com  Mon May 19 14:22:58 2008
From: davidreynon at gmail.com (korean_dave)
Date: Mon, 19 May 2008 11:22:58 -0700 (PDT)
Subject: sre_parse.py - over-view or explanation needed
Message-ID: <1cad446e-9828-479b-bf39-08bd2b02b1eb@b1g2000hsg.googlegroups.com>

What does sre_parse.py (Secret Labs' Regular Expression Engine) do?

I see this referred to in some errors when i call the source()
function

(e.g. source(findFile("scripts","thisonehere.py")) )

The error then refers to name "ImportWarning" not defined?? (<--that
might be a proprietary warning, as I am running another app on top of
Python (not really relevant)).

I am curious how the sre_parse.py module gets involved when neither
the name or the file has any regular expression or special parse rules
in it....

So I guess the first step is understanding sre_parse.py itself. Can
someone help me on that?

Thanks.


From musiccomposition at gmail.com  Sun May  4 22:08:25 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Sun, 4 May 2008 19:08:25 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <0e8aca56-5e92-4969-b34c-e27431c383f3@b1g2000hsg.googlegroups.com>

On May 4, 6:45 pm, notbob <not... at nothome.com> wrote:
> I'm trying to learn how to program.  I'm using:
>
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition
>
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.

Everybody is very nice on IRC, in forums, and here. We don't bite that
hard!
>
> nb



From chandran.ram28 at gmail.com  Sun May 11 00:18:54 2008
From: chandran.ram28 at gmail.com (chandran.ram28 at gmail.com)
Date: Sat, 10 May 2008 21:18:54 -0700 (PDT)
Subject: hai dear
Message-ID: <2d08b6f3-ce50-4620-bf15-04d02f63fee2@z16g2000prn.googlegroups.com>

hai friends,

"each day is a new adventure to dream search and discover"

www.goodhistory5.blogspot.com


From sjmachin at lexicon.net  Wed May  7 18:08:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 7 May 2008 15:08:56 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<m2fxsu55ri.fsf@googlemail.com>
	<55671aeb-fbd7-432e-b2f2-f558bc8e1702@s33g2000pri.googlegroups.com>
Message-ID: <063e90e7-ff78-405f-8b2b-42d9df3c454b@j33g2000pri.googlegroups.com>

On May 8, 6:00 am, umpsu... at gmail.com wrote:
> That's a great suggestion Arnaud.  I'll keep that in mind next time I
> post code. Thanks ;)
>

It's a suggestion for YOUR benefit, not ours. Consider keeping it in
mind next time you WRITE code, whether you intend publishing it or
not.



From wojtek.gminick.walczak at gmail.com  Tue May  6 06:55:55 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 12:55:55 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
Message-ID: <2c3c21060805060355sc81eb61t3af6989e978e0596@mail.gmail.com>

2008/5/6, Banibrata Dutta <banibrata.dutta at gmail.com>:
>  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>
>  So why not put symlink to Python over there on all machines, if we can
>  put one (or env itself) there ?

To avoid linking all the rest of interpreters like perl, ruby, lua and dozens
of others.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From marlin_rowley at hotmail.com  Sat May 17 22:14:36 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 21:14:36 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482F75DF.1020700@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
	<482F0090.4030003@islandtraining.com>
	<BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
	<482F75DF.1020700@islandtraining.com>
Message-ID: <BAY135-W23FD5885A7B29CBF8534419FCA0@phx.gbl>

Gary,
 
That works.  And it's better than my solution:
 
#a = numpy.rollaxis(a,2,0)
#a = numpy.rollaxis(a,0,1)
#a = numpy.rollaxis(a,1,0)
 
Thanks!
 
-M



> Date: Sat, 17 May 2008 17:18:39 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > Actually in my traversal of the never-ending maze of understanding > > arrays in python, I stumbled that the data in the wrong sequence.> >> > Let's get back to this transpose() deal, say we have these values as > > integers (representing rgba again):> >> > [[[0,1,2,3]> > [4,5,6,7]> > [8,9,10,11]> > [12,13,14,15]]> >> > [[16,17,18,19]> > [20,21,22,23]> > [24,25,26,27]> > [28,29,30,31]]]> >> > Now if I do this: transpose((2,0,1)), I get this:> >> > [[[0,4,8,12] [16,20,24,28]]> > [[1,5,9,13] [17,21,25,29]]> > [[2,6,10,14][18,22,26,30]]> > [[3,7,11,15][19,23,27,31]]]> >> > This is NOT what I want. I want the new array to be:> >> > [0,4,8,12][1,5,9,13]> > [2,6,10,14][3,7,11,15]> > [16,20,24,28][17,21,25,29]> > [18,22,26,30][19,23,27,31]> >> > How do I do this?> > That's s little ambiguous, but one of the following two > transpose-reshape-print's might be what you want.> > Gary Herron> > > import numpy> > a = numpy.array([[[0,1,2,3],> [4,5,6,7],> [8,9,10,11],> [12,13,14,15]],> > [[16,17,18,19],> [20,21,22,23],> [24,25,26,27],> [28,29,30,31]]])> > > print numpy.reshape(a.transpose(0,2,1), (8,4))> print numpy.reshape(a.transpose(0,2,1), (4,2,4))> > output is:> > [[ 0 4 8 12]> [ 1 5 9 13]> [ 2 6 10 14]> [ 3 7 11 15]> [16 20 24 28]> [17 21 25 29]> [18 22 26 30]> [19 23 27 31]]> > and> > [[[ 0 4 8 12]> [ 1 5 9 13]]> > [[ 2 6 10 14]> [ 3 7 11 15]]> > [[16 20 24 28]> [17 21 25 29]]> > [[18 22 26 30]> [19 23 27 31]]]> > > > >> > -M> >> >> >> >> >> > ------------------------------------------------------------------------> >> > > Date: Sat, 17 May 2008 08:58:08 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com> > > CC: python-list at python.org> > > Subject: Re: numpy.frombuffer != unpack() ??> > >> > > Marlin Rowley wrote:> > > >> > > > Very cool.> > > >> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > a represents a tile with height of 2 and width of 4 with 4 bits/pixel> > > > for each color.> > > >> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')> > > > this seperates the stream into individual values - Check> > > >> > > > > >>> b.shape=(2,4,4)> > > >> > > > This reshapes the array so that b.shape=(height,width,#bits/pixel) > > - Check> > > >> > > > >>> c = b.transpose((2,0,1))> > > >> > > > What does the (2,0,1) represent in terms of width and height and> > > > number of bytes?> > >> > > The (2,0,1) tells how to exchange the axes. For instance in a 2D array,> > > a normal transpose exchanges rows and columns. It will change a (a by> > > b) sized array into a (b by a) sized array. This would be equivalent to> > > the more saying interchange axes 0,1 to the new order of 1,0.> > >> > > In numpy with higher dimension arrays, the default transpose just> > > exchanges the first two axes, and the full transpose allows you to> > > specify exactly the new ordering of the exes.> > >> > > So transpose((2,0,1)) means take axes (0,1,2) to the new order> > > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being> > > of size (c by a by b) in size.> > >> > > In terms of implementation, there may not be *any* data re-arrangement> > > in a transpose. The only thing that needs changing is how the indices> > > are converted to an actual machine address of an indexed item. The> > > documentation notes this by saying transpose returns a "new view" of > > the> > > array. This explains why I copied the array before extracting bytes> > > out of it -- you really do need the elements in the new order for the> > > next operation.> > >> > > Gary Herron> > >> > > >> > > >> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > > Date: Fri, 16 May 2008 17:08:20 -0700> > > > > From: gherron at islandtraining.com> > > > > To: marlin_rowley at hotmail.com; python-list at python.org> > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > >> > > > > Marlin Rowley wrote:> > > > > > All:> > > > > >> > > > > > Say I have an array:> > > > > >> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > > >> > > > > > How do I make it so that I now have:> > > > > >> > > > > > starting with first element (a[0])> > > > > > new_arr[0] = 'r'> > > > > > new_arr[1] = 'g'> > > > > > new_arr[2] = 'b'> > > > > > new_arr[3] = 'a'> > > > > > new_arr[4] = 'r'> > > > > > .....> > > > > >> > > > > > continuing "through" a[1] with the same new_arr> > > > > > new_arr[N] = 'r'> > > > > > new_arr[N+1] = 'g'> > > > > > ....> > > > > >> > > > > > -M> > > > >> > > > > Numpy can do this for you. First, do you really mean the array to> > > > > contain lists of one string each? If so:> > > > >> > > > > >>> import numpy> > > > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a> > > > > kludge here> > > > > >>> b> > > > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', > > 'b', 'a',> > > > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> > > > > 'b', 'b', 'a', 'a', 'a', 'a'],> > > > > dtype='|S1')> > > > > >>> b.shape=(2,4,4)> > > > > >>> b> > > > > array([[['r', 'r', 'r', 'r'],> > > > > ['g', 'g', 'g', 'g'],> > > > > ['b', 'b', 'b', 'b'],> > > > > ['a', 'a', 'a', 'a']],> > > > >> > > > > [['r', 'r', 'r', 'r'],> > > > > ['g', 'g', 'g', 'g'],> > > > > ['b', 'b', 'b', 'b'],> > > > > ['a', 'a', 'a', 'a']]],> > > > > dtype='|S1')> > > > > >>> c = b.transpose((2,0,1))> > > > > >>> c> > > > > array([[['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']]],> > > > > dtype='|S1')> > > > > >>> d=c.copy() # To make it contiguous> > > > > >>> d.shape = (32,)> > > > > >>> d> > > > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', > > 'a', 'r',> > > > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> > > > > 'b', 'a', 'r', 'g', 'b', 'a'],> > > > > dtype='|S1')> > > > >> > > > > Done. Cool no?> > > > >> > > > > Gary Herron> > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > From: marlin_rowley at hotmail.com> > > > > > To: robert.kern at gmail.com; python-list at python.org> > > > > > Subject: RE: numpy.frombuffer != unpack() ??> > > > > > Date: Fri, 16 May 2008 17:31:30 -0500> > > > > >> > > > > > Thank you! That solved it!> > > > > >> > > > > > -M> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > >> > > > > > > To: python-list at python.org> > > > > > > From: robert.kern at gmail.com> > > > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > > > > Date: Fri, 16 May 2008 17:25:00 -0500> > > > > > >> > > > > > > Marlin Rowley wrote:> > > > > > > > All:> > > > > > > >> > > > > > > > I'm getting different floating point values when I use numpy> > > > > > vs. unpack().> > > > > > > >> > > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > > > > > buffer = unpack("!f", byte)> > > > > > > >> > > > > > > > frgba[0] != buffer[0]> > > > > > > >> > > > > > > > why? This is forcing me use the unpack() function since it's> > > > > > giving me> > > > > > > > the correct values. What am I doing wrong?> > > > > > >> > > > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > > > > > '>'). Most> > > > > > > likely, you are on a little-endian platform. All of the dtypes> > > > > > in numpy default> > > > > > > to the native-endianness unless specified. If you want to read> > > > > > big-endian data> > > > > > > using numpy, do this:> > > > > > >> > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > > > > > >> > > > > > > If you have any more problems with numpy, please join us on the> > > > > > numpy mailing> > > > > > > list. When reporting problems, please try to provide a small but> > > > > > complete> > > > > > > snippet of self-contained code, the output that you got, and> > > > > > explain the output> > > > > > > that you expected to get. Thank you.> > > > > > >> > > > > > > http://www.scipy.org/Mailing_Lists> > > > > > >> > > > > > > --> > > > > > > Robert Kern> > > > > > >> > > > > > > "I have come to believe that the whole world is an enigma, a> > > > > > harmless enigma> > > > > > > that is made terrible by our own mad attempt to interpret it as> > > > > > though it had> > > > > > > an underlying truth."> > > > > > > -- Umberto Eco> > > > > > >> > > > > > > --> > > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > E-mail for the greater good. Join the i?m Initiative from> > > > > > Microsoft.> > > > > >> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> > > > > >> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > E-mail for the greater good. Join the i?m Initiative from > > Microsoft.> > > > > >> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > >> > > > > > --> > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > Keep your kids safer online with Windows Live Family Safety. Help> > > > protect your kids.> > > > > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Keep your kids safer online with Windows Live Family Safety. Help > > protect your kids. > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From banibrata.dutta at gmail.com  Fri May  9 09:30:17 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 19:00:17 +0530
Subject: Pythonwin
In-Reply-To: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
Message-ID: <3de8e1f70805090630k360bf584oebc5def114644538@mail.gmail.com>

oops moment!

I was wrong. indeed, you should find PythonWin there, if you installed
ActiveState Python.


On 5/9/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
> if one has installed ActiveState Python 2.5, I think it'd have been
>   Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
> and I think it delivers IDLE, not PythonWin.
>
>
> On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:
>>
>> On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
>> > Hi
>> >
>> > I am trying to use Python with ArcGIS.
>> >
>> > I have installed Python 2.4. I have an icon for IDLE and command line.
>> > I do not see Python PythonWin.
>> >
>> > How do you install or launch pythonwin??
>> >
>> > Thanks
>> >
>> > Clive
>>
>> I have PythonWin installed in my Start Menu --> Programs --> Python
>> 2.5. I may have installed the ActiveState version though. Just check
>> if it's there on your system and if not, you can follow Niklas's
>> advice.
>>
>> Mike
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com




-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From BrianVanderburg2 at aim.com  Thu May  1 08:18:12 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 01 May 2008 08:18:12 -0400
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <4819B504.1000108@aim.com>

Lance Gamet wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.
>
> Thanks a lot.
> Lance
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Lance Gamet wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.
>
> Thanks a lot.
> Lance
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
One way I've just started to use it to create a utility function to 
return the location of the user data folder, depending on the operating 
system:

import os, sys

def GetUserDataDirectory():
    dir = None

    # WINDOWS
    if os.name == "nt":

       # Try env APPDATA or USERPROFILE or HOMEDRIVE/HOMEPATH
       if "APPDATA" in os.environ:
          dir = os.environ["APPDATA"]

       if ((dir is None) or (not os.path.isdir(dir))) and ("USERPROFILE" 
in os.environ):
          dir = os.environ["USERPROFILE"]
          if os.path.isdir(os.path.join(dir, "Application Data")):
             dir = os.path.join(dir, "Application Data"))

       if ((dir is None) or (not os.path.isdir(dir))) and ("HOMEDRIVE" 
in os.environ) and ("HOMEPATH" in os.environ):
          dir = os.environ["HOMEDRIVE"] + os.environ["HOMEPATH"]
          if os.path.isdir(os.path.join(dir, "Application Data")):
             dir = os.path.join(dir, "Application Data"))

       if (dir is None) or (not os.path.isdir(dir))
          dir = os.path.expanduser("~")

       # One windows, add vendor and app name
       dir = os.path.join(dir, "vendor", "app")

    # Mac
    elif os.name == "mac": # ?? may not be entirely correct
       dir = os.path.expanduser("~")
       dir = os.path.join(dir, "Library", "Application Support")
       dir = os.path.join(dir, "vendor", "app")

    # Unix/Linux/all others
    else:
       dir = os.path.expanduser("~")
       dir = os.path.join(dir, ".app")
       # Some applications include vendor
       # dir = os.path.join(dir, ".vendor", "app")

    return dir

   
Brian Vanderburg II
   


From gagsl-py2 at yahoo.com.ar  Mon May 12 05:24:50 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 06:24:50 -0300
Subject: Problem with help() in python/ipython interpreters
References: <62818f52-025a-48b1-b451-70abae1e6580@a23g2000hsc.googlegroups.com>
Message-ID: <op.ua1a3o00x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 20:45:09 -0300, Casey <Caseyweb at gmail.com> escribi?:

> I'm running python 2.5.2 on WinXP.  I've always used a GUI for
> interactive development, but I wanted to try out ipython which better
> supports matplotlib in this mode.  Unfortunately, whenever I try to
> use help() I get the following error:
>
> (Sys) The system cannot find the file specified.
>  "C:\documents"
>
> It turns out that the regular (python.exe) interpreter has the same
> problem.  I have the HTML docs installed, my PYTHONDOCS environment
> variable points to the HTML directory, and I actually uninstalled and
> reinstalled every library I use from scratch to make sure it wasn't
> some random config issue.

I don't know exactly how does help() try to find the documentation, but I have these differences:

- I don't have a PYTHONDOCS variable (nor PYTHONPATH nor anything similar)
- The Windows registry contains this entry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\2.5\Help\Main Python Documentation]
@="C:\\Apps\\Python25\\Doc\\Python25.chm"
- I *think* that I installed the HTML docs on that same directory a long time ago...

Hope this info could help you.

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Thu May 29 03:36:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 May 2008 07:36:19 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
Message-ID: <Xns9AAD55E793C9Dduncanbooth@127.0.0.1>

Dave Parker <daveparker at flamingthunder.com> wrote:

> Catch doesn't return just error types or numbers, it can return any
> object returned by the statements that are being caught; catch doesn't
> care what type they are.  For example:
> 
>   Writeline catch(set x to "hello world".).
> 
> will write "hello world".

I really don't get this. Surely the point about an error being thrown to a 
catch statement is that the error path is separate from the normal 
execution path? What you are doing here is ensuring that unexpected errors 
have no chance at all of propagating up to the top level: they are 
invariably going to get caught by some other handler that was installed 
just because someone was too lazy to write a set statement followed by a 
writeline.

-- 
Duncan Booth http://kupuguy.blogspot.com


From george.sakkis at gmail.com  Tue May 13 06:55:37 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 13 May 2008 03:55:37 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
Message-ID: <b03d5e07-efb5-479e-86df-f1e9bc33c774@m45g2000hsb.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 06:34:03 -0300, <wxPytho... at gmail.com> escribi?:
>
> > Is that true that this comparison operators are gone in Python 3.0:
>
> > < ? ?(is less than)
> >> ? ?(is greater than)
> > <= (is less than or equals)
> >> = (is greater than or equals)
>
> > Is it true?
>
> May I ask *where* did you read that crazy idea?

My guess is that he heard about the TypeErrors to be raised when
comparing values of different types and he misinterpreted it,
deliberately or not.

George


From inhahe at gmail.com  Fri May 23 04:42:38 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 04:42:38 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <BqvZj.2718$772.1718@bignews2.bellsouth.net>


"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4836772e$0$6097$426a74cc at news.free.fr...
> Brad a ?crit :
>> cm_gui wrote:
>>> Python is slow.
>>
>> It ain't C++, but it ain't a punch card either... somewhere in between. I 
>> find it suitable for lots of stuff. I use C++ when performance really 
>> matters tho... right tool for the job. Learn a good interpreted language 
>> (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.

That's like saying being spherical is not a property of planets, it's a 
property of an instanciation of a planet.  Let alone that a) all known 
planets are spherical (all implementations of Python are not natively 
compiled (and you said for whatever definition)), and b) It's a far cry to 
imagine a planet coming into being that's not spherical (a language as 
dynamic as Python, or most other scripting languages, would be either 
extremely difficult or impossible to make a native compiler for).  I guess I 
should also mention that Python isn't very practical (as in "suitable", 
"right tool for the job", and "perfomance", as mentioned in the above post) 
without an implementation.  So I don't think this distinction has any use 
other than to beat other people over the head with a bat.

>
> 2/ actually, all known Python implementations compile to byte-code.
>

Which is then interpreted, but you're still technically right, because 
"compiled" can mean either compiled to bytecode or compiled to native code, 
despite what it actually did mean.  Semantics FTW!!








From martin at v.loewis.de  Sun May 11 18:35:32 2008
From: martin at v.loewis.de (=?ISO-8859-2?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 00:35:32 +0200
Subject: IDLE 3.0a5 has problems with Unicode
In-Reply-To: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <482774b4$0$11617$9b622d9e@news.freenet.de>

> Is this a known bug if IDLE 3.0a5 which will be fixed in the final
> release?

No, it's now a known bug (at least I don't know it). Whether or not it
gets fixed might depend on whether or not it gets reported to
bugs.python.org.

Regards,
Martin


From kyosohma at gmail.com  Tue May 13 09:19:26 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 06:19:26 -0700 (PDT)
Subject: Running compiled windows service python script
References: <mailman.1036.1210674040.12834.python-list@python.org>
Message-ID: <1a4d772f-3b61-4d10-9255-0d9fab6ec053@k37g2000hsf.googlegroups.com>

On May 13, 5:15?am, Aspersieman <aspersie... at gmail.com> wrote:
> Hi All
>
> I have a windows service (attached file). I basically just calls another
> script every 60 seconds. I can install, start and stop this service as
> expected with:
> ? ? ParseMailboxService.py install | start | stop
>
> The problem is: if I create an exe of this script (all required modules
> are included in the exe) with gui2exe (a frontend to py2exe) I can
> install the service - but not start it. The error it returns is "Error
> starting service: The service did not respond to the start or control
> request in a timely fashion."
>
> Is there something I need to additionally include in the compiled exe? I
> have manually included the following modules:
> ? ? * servicemanager
> ? ? * win32con
> ? ? * win32evtlogutil
> ? ? * win32serviceutil
>
> I would greatly appreciate any help.
>
> Regards
>
> Nicol
>
> --
>
> The three things to remember about Llamas:
> 1) They are harmless
> 2) They are deadly
> 3) They are made of lava, and thus nice to cuddle.
>
> ?ParseMailBoxService.py
> 2KDownload

I recommend re-posting to the PyWin32 user's group and possibly the
py2exe group.

http://mail.python.org/mailman/listinfo/python-win32
https://lists.sourceforge.net/lists/listinfo/py2exe-users

Alternatively, you can check these links out that are about creating
Windows Services in Python:

http://agiletesting.blogspot.com/2005/09/running-python-script-as-windows.html
http://essiene.blogspot.com/2005/04/python-windows-services.html
http://tgolden.sc.sabren.com/python/wmi.html

Hope that helps!

Mike


From skanemupp at yahoo.se  Mon May  5 08:04:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 05:04:31 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
Message-ID: <e8e0c496-d780-40e7-b3d5-5e92b07990c4@27g2000hsf.googlegroups.com>

On 5 Maj, 14:03, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 13:47, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > globalrev wrote:
> > >http://www.pygame.org/docs/ref/mixer.html
>
> > > import pygame
>
> > > #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> > > buffer=3072)  //it complained abiout words=
> > > so i guess its only the nbrs should be there//
>
> > > pygame.mixer.init(22050, -16, 2, 3072)
> > > pygame.mixer.music.load("example1.mp3")
> > > pygame.mixer.music.play(loops=1, start=0.0)
>
> > > Traceback (most recent call last):
> > >   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> > > <module>
> > >     pygame.mixer.music.load("example1.mp3")
> > > error: Couldn't read from 'example1.mp3'
>
> > Give it the full path to the MP3. Be aware of backward slashes + the need to
> > escape them.
>
> > Diez
>
> escape them?
>
> import pygame
>
> #pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=3072)
> pygame.mixer.init(22050, -16, 2, 3072)
> pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
> example1.mp3')
> pygame.mixer.music.play(loops=1, start=0.0)
>
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> <module>
>     pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
> example1.mp3')
> error: Couldn't read from 'C:/Python25/myPrograms/pygameProgs/
> example1.mp3'

tried filenames with \ also but same result.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 11:59:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 17:59:02 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
Message-ID: <48359832$0$29163$426a74cc@news.free.fr>

Agustin Villena a ?crit :
> On May 22, 5:19 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Agustin Villena a ?crit :
>>
>>>> And not that useful - why would one care about the function being
>>>> defined in class X or Y when one have the exact file and line ?
>>> I have 3 reasons:
>>> 1) My developing time is expended running unit tests and browsing
>>> tracebacks to find which is the real problem. Knowing the offender
>>> class (instead of the method alone) makes me understand more quickly
>>> which component of my software is failing.
>> This is only true when there is an obvious, one-to-one, unambiguous
>> relationship between the physical location of the error (file, line) and
>> the class of the object the method has been called on. Which is not
>> necessarily the case (inheritance, method decoration and monkeypatching
>> comes to mind here...).
>>
>> Also, your above statement seems to imply that component==class, which
>> is not the case in Python.
>>
>>> 2) There are some ocassions where I only have the traceback (e.g. when
>>> analyzing an app's log) and no inmediate access to teh source code
>> Ok. But the above still apply...
>>
>>> 3) And finally, for completeness: If a function is really a method, if
>>> the traceback show only its name and not the class that defines it,
>>> for me its a bug, because the method name has no sense out of its
>>> class.
>> I'm not sure you really grasp what "methods" are in Python. What you
>> define (using the def statement) within a class is function, not a
>> method. It only becomes a method when it's looked up on an instance or
>> class object, and this 'method' is only a thin wrapper around the
>> instance, class and function objects. And FWIW, you don't need to define
>> the function within the class to make it a method:
>>
>> # bar.py
>> def bar(obj):
>>    print "function bar.bar called on obj %s" % obj
>>
>> # foo.py
>>
>> class Foo(object): pass
>>
>> # baaz.py
>> from foo import Foo
>> import bar
>>
>> Foo.baaz = bar.bar
>>
>> def guux(obj):
>>    print "function baaz.guux called on obj %s" % obj
>>
>> # main.py
>> from baaz import Foo
>> f = Foo()
>> f.bar()
>>
>> f.gnix = baae.guux.__get__(f, type(f))
>> f.gnix()
>>
>> Not to say that your concerns are pointless, and that things cannot be
>> improved somehow, but this is not that trivial, and there may be
>> ambuiguities in some not so rare cases.
> 
> Well, the solution given in an early response is good enough for me.

Not for me.

> I don't see things like you, because I'm accustomed to design my
> software
> though classes and see the code in an "object = software's functional
> atom/component" way

I guess you mean 'class = software's functional atom/component' - 
because it's perfectly legal, in Python, to have per-instance methods...

Now the fact that *you* see it that way doesn't mean Python (and most 
Python users) have to share your views, so labelling the way it works as 
"a bug" sounds a bit arrogant to me.

> I agree that python's dynamic nature make things complicated here, but
> for me it its just
> an implementation problem derived of the recent OOP support of python

I beg your pardon ? "recent OOP support in Python" ? Python had classes 
and objects years before Oak was renamed as Java and made public, you know.


From notnorwegian at yahoo.se  Mon May 26 14:34:10 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 11:34:10 -0700 (PDT)
Subject: definition of a highlevel language?
Message-ID: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>

(might not be the right forum for this but...)

what is the definition of a highlevel-language?

well there isnt one specifically and wikipedia and the like gives just
a very general description obv you can say it abstracts away lowlever
operations.


yes but how?

a function like map takes a function and applies it to a list for
example.
this abstracts away a common procedure like iterate through a list and
for every position do a computation.
so it is a higherorderfunction. is this how higher-level-languages are
built?


so are they fundamentally differently built or is it just a lot of
lowlevel operations built on top of each other?


haskell is considered a very highlevellanguage but can you do
systemsprogramming with it(yes maybe it is very unpractical i dont
know but can you)?


is lambda calculus a more abstract and efficient way of modeling a
computer? meaning you start at a higher level of abstraction and can
work up to even higher even faster?


how did lispmachines work? was the basic system programmed in LISP?


From duncan.booth at invalid.invalid  Tue May 27 04:35:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 May 2008 08:35:45 GMT
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
	<b5bf2f79-5f6e-44c0-9ecb-d91204ee7c64@e53g2000hsa.googlegroups.com>
Message-ID: <Xns9AAB618417C4Fduncanbooth@127.0.0.1>

Dan Bishop <danb_83 at yahoo.com> wrote:

> On May 26, 9:46?pm, notnorweg... at yahoo.se wrote:
>> >>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I',
>> 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>> >>> x
>>
>> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
>> 'clever', 'handsome']
>>
>>
>>
>> what do i need to do?
> 
> x.sort(key=str.upper)

Or another option to consider:

>>> import locale
>>> locale.setlocale(locale.LC_COLLATE, 'en')
'English_United States.1252'
>>> print ', '.join(sorted(['CHAPTER', 'eu', 'Emma', 'I', 'I', 'VOLUME', 
'Woodhouse', 'clever', 'handsome', '\xe9t\xe9'], key=locale.strxfrm))
CHAPTER, clever, Emma, ?t?, eu, handsome, I, I, VOLUME, Woodhouse

Annoyingly strxfrm in Python 2.5 can't cope with unicode so if you go this 
way you need to make sure that the strings are all encoded with the correct 
encoding (which in this example is the 1252 at the end of the string  
returned from setlocale) or define a new key function which applies the 
correct encoding.

-- 
Duncan Booth http://kupuguy.blogspot.com


From ahmed_kh1987 at yahoo.com  Wed May 21 12:21:05 2008
From: ahmed_kh1987 at yahoo.com (ahmed khattab)
Date: Wed, 21 May 2008 09:21:05 -0700 (PDT)
Subject: No subject
Message-ID: <338512.44068.qm@web39704.mail.mud.yahoo.com>

unsubscribe me form python list plz

       
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From deets at nospam.web.de  Wed May 28 10:06:58 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 16:06:58 +0200
Subject: Error handling in Python
References: <5d6a51a9-3d35-4c99-b7ef-fa79f950ece8@l17g2000pri.googlegroups.com>
Message-ID: <6a5791F32qcugU1@mid.uni-berlin.de>

subhabrata.iisc at hotmail.com wrote:

> Dear Members of the group,
> If I open a url by urlopen in the urllib, the file is either opening a
> file or if no url is there it would give error. The error is generated
> can be handled by IOError handling schemes.
> But if there are thousands or millions of URLs and I do not know who
> will open and who won't open. How can I handle this kind of situation?
> If any one can help solving this problem.

http://docs.python.org/tut/node10.html

Diez


From pistacchio at gmail.com  Wed May  7 07:12:49 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 13:12:49 +0200
Subject: PHP + TinyButStrong Python replacement
Message-ID: <fvs2rj$cru$1@aioe.org>

hi! i'm a php user and a python programmer. i'd love to use python for 
my server side needs but i can't seem to find what i'm looking for. for 
most of my php work i use mysql and tinyButStrong 
(http://www.tinybutstrong.com) which is a very lightweight template 
engine that offers powerful functionalities. you insert TBS tags in web 
pages like:

<div align="center" class="title-page"> [var.x] </div>

and it replaces [var.x] with the value of global variable x. it also 
makes blocks (and nested blocks) easy to implement:

<p class="text-example2"> [blk1;block=begin] [blk1.val]<br> 
[blk1;block=end] </p>

in the previous code it cycles throu all the values of the array blk1.

it does many more things, like htlm escaping, url and js encoding etc, 
conditional displaying etc, but it is not more confusing that inserting 
pieces of code into the HTML (aka: littering the code and kissing 
goodbye to the code/presentation separation). it comes in the form of a 
single file with a single class that you can easily include in the code 
and go.

now, i've searched the net and it seems full of python-based frameworks 
for doing server side scripting and templating, but none that suits my 
needs.

    1. i like writing code and i like control. i mean, open up the 
simplest text editor and write in it. i don't want something that is 
command-line driven or that writes code for me like ">>> 
makePagesFromThisDatabase()".
    2. i want something very lightweight. i don't want dozen of options, 
pre-made blogging parts ecc. i just need a good non invasive template 
engine and the basic functions for server side scripting, like session 
managing, request parsing, functions to manipulate html code (encodings etc)
    3. i don't want to beg my hosting provider to install the libraries. 
a simple include file should do the work.
    4. object oriented programming is not required (better: i prefer 
plain old procedural programming).

any help? thanks in advance


From netizen at gmx.de  Fri May 23 08:29:34 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 14:29:34 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
Message-ID: <5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>

.oO(Duncan Booth)

>On those rare occasions when I've helped someone who wanted advice I've 
>found that my Python oriented viewpoint can be quite hard to translate to 
>PHP. For example I'd suggest 'oh you just encode that as utf8' only to be 
>told that there's no easy way to do that (have just Google'd it looks like 
>there is now a way to do that but with a big red warning about it being 
>EXPERIMENTAL and only use at your own risk).
>
>(Looking at the example given for unicode_encode it appears to depend for 
>its working on a global setting which isn't included in the example. I may 
>have misunderstood the example but if I read that correctly its a good 
>example of why PHP doesn't fit my brain.)

The only little problem is that PHP doesn't have native Unicode support
yet, which will change with PHP 6. But of course you can still use UTF-8
without any trouble, I do it all the time. You just have to keep in mind
that many string functions still work on bytes, not on characters, but
this can almost always be solved with the Multibyte extension. Apart
from that there's no problem with PHP and UTF-8. It's also easily
possible to convert between various encodings using the iconv extension.

Micha


From dfnsonfsduifb at gmx.de  Sat May 24 07:13:08 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:13:08 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
Message-ID: <4r9lg5xvm8.ln2@joeserver.homelan.net>

George Sakkis schrieb:

>> However, this "assignment and comparison" is not working. What's the
>> "Python way" of doing this kind of thing?
> 
> The most obvious and readable of course: use two statements, as one
> should do regardless of the language, instead of resorting to error-
> prone hacks.

As I said in the reply to Carl, this might be okay for if-clauses, but 
is bothering me with while-loops.

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From agustin.villena at gmail.com  Fri May 30 16:08:00 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Fri, 30 May 2008 13:08:00 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
	<48359832$0$29163$426a74cc@news.free.fr>
Message-ID: <7f4c2ee4-a66f-46ca-9737-8fb3e44201cb@59g2000hsb.googlegroups.com>

To this therad, I received 2 kinds of anwsers:
- some that help me in
- and other where some guy thinks that has the right to rule if my
need has some value

Thanksfully, Python is an open platform, and with the help obtained
here, now I can fullfill my needs.
Who is the arrogant?

On 22 mayo, 11:59, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Agustin Villena a ?crit :
>
>
>
> > On May 22, 5:19 am, Bruno Desthuilliers <bruno.
> > 42.desthuilli... at websiteburo.invalid> wrote:
> >> Agustin Villena a ?crit :
>
> >>>> And not that useful - why would one care about the function being
> >>>> defined in class X or Y when one have the exact file and line ?
> >>> I have 3 reasons:
> >>> 1) My developing time is expended running unit tests and browsing
> >>> tracebacks to find which is the real problem. Knowing the offender
> >>> class (instead of the method alone) makes me understand more quickly
> >>> which component of my software is failing.
> >> This is only true when there is an obvious, one-to-one, unambiguous
> >> relationship between the physical location of the error (file, line) and
> >> the class of the object the method has been called on. Which is not
> >> necessarily the case (inheritance, method decoration and monkeypatching
> >> comes to mind here...).
>
> >> Also, your above statement seems to imply that component==class, which
> >> is not the case in Python.
>
> >>> 2) There are some ocassions where I only have the traceback (e.g. when
> >>> analyzing an app's log) and no inmediate access to teh source code
> >> Ok. But the above still apply...
>
> >>> 3) And finally, for completeness: If a function is really a method, if
> >>> the tracebackshowonly its name and not the class that defines it,
> >>> for me its a bug, because the method name has no sense out of its
> >>> class.
> >> I'm not sure you really grasp what "methods" are in Python. What you
> >> define (using the def statement) within a class is function, not a
> >> method. It only becomes a method when it's looked up on an instance or
> >> class object, and this 'method' is only a thin wrapper around the
> >> instance, class and function objects. And FWIW, you don't need to define
> >> the function within the class to make it a method:
>
> >> # bar.py
> >> def bar(obj):
> >>    print "function bar.bar called on obj %s" % obj
>
> >> # foo.py
>
> >> class Foo(object): pass
>
> >> # baaz.py
> >> from foo import Foo
> >> import bar
>
> >> Foo.baaz = bar.bar
>
> >> def guux(obj):
> >>    print "function baaz.guux called on obj %s" % obj
>
> >> # main.py
> >> from baaz import Foo
> >> f = Foo()
> >> f.bar()
>
> >> f.gnix = baae.guux.__get__(f, type(f))
> >> f.gnix()
>
> >> Not to say that your concerns are pointless, and that things cannot be
> >> improved somehow, but this is not that trivial, and there may be
> >> ambuiguities in some not so rare cases.
>
> > Well, the solution given in an early response is good enough for me.
>
> Not for me.
>
> > I don't see things like you, because I'm accustomed to design my
> > software
> > though classes and see the code in an "object = software's functional
> > atom/component" way
>
> I guess you mean 'class = software's functional atom/component' -
> because it's perfectly legal, in Python, to have per-instance methods...
>
> Now the fact that *you* see it that way doesn't mean Python (and most
> Python users) have to share your views, so labelling the way it works as
> "a bug" sounds a bit arrogant to me.
>
> > I agree that python's dynamic nature make things complicated here, but
> > for me it its just
> > an implementation problem derived of the recent OOP support of python
>
> I beg your pardon ? "recent OOP support in Python" ? Python had classes
> and objects years before Oak was renamed as Java and made public, you know.



From jonbutler88 at googlemail.com  Thu May 22 15:06:18 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Thu, 22 May 2008 12:06:18 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com>
Message-ID: <2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com>

On May 22, 9:59?am, alex23 <wuwe... at gmail.com> wrote:
> On May 22, 6:22 pm, jonbutle... at googlemail.com wrote:
>
> > Still getting very odd errors though, this being the latest:
>
> > Traceback (most recent call last):
> > ? File "spider.py", line 38, in <module>
> > [...snip...]
> > ? ? raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
> > httplib.InvalidURL: nonnumeric port: ''
>
> Okay. What I did was put some output in your Spider.parse method:
>
> ? ? def parse(self, page):
> ? ? ? ? try:
> ? ? ? ? ? ? print 'http://' + page
> ? ? ? ? ? ? self.feed(urlopen('http://' + page).read())
> ? ? ? ? except HTTPError:
> ? ? ? ? ? ? print 'Error getting page source'
>
> And here's the output:
>
> ? ? >python spider.py
> ? ? What site would you like to scan?http://www.google.com
> ? ?http://www.google.com
> ? ?http://http://images.google.com.au/imghp?hl=en&tab=wi
>
> The links you're finding on each page already have the protocol
> specified. I'd remove the 'http://' addition from parse, and just add
> it to 'site' in the main section.
>
> ? ? if __name__ == '__main__':
> ? ? ? ? s = Spider()
> ? ? ? ? site = raw_input("What site would you like to scan? http://")
> ? ? ? ? site = 'http://' + site
> ? ? ? ? s.crawl(site)
>
> > Also could you explain why I needed to add that
> > HTMLParser.__init__(self) line? Does it matter that I have overwritten
> > the __init__ function of spider?
>
> You haven't overwritten Spider.__init__. What you're doing every time
> you create a Spider object is first get HTMLParser to initialise it as
> it would any other HTMLParser object - which is what adds the .rawdata
> attribute to each HTMLParser instance - *and then* doing the Spider-
> specific initialisation you need.
>
> Here's an abbreviated copy of the actual HTMLParser class featuring
> only its __init__ and reset methods:
>
> ? ? class HTMLParser(markupbase.ParserBase):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? """Initialize and reset this instance."""
> ? ? ? ? ? ? self.reset()
>
> ? ? ? ? def reset(self):
> ? ? ? ? ? ? """Reset this instance. ?Loses all unprocessed data."""
> ? ? ? ? ? ? self.rawdata = ''
> ? ? ? ? ? ? self.lasttag = '???'
> ? ? ? ? ? ? self.interesting = interesting_normal
> ? ? ? ? ? ? markupbase.ParserBase.reset(self)
>
> When you initialise an instance of HTMLParser, it calls its reset
> method, which sets rawdata to an empty string, or adds it to the
> instance if it doesn't already exist. So when you call
> HTMLParser.__init__(self) in Spider.__init__(), it executes the reset
> method on the Spider instance, which it inherits from HTMLParser...
>
> Are you familiar with object oriented design at all? If you're not,
> let me know and I'll track down some decent intro docs. Inheritance is
> a pretty fundamental concept but I don't think I'm doing it justice.

Nope, this is my first experience with object oriented programming,
only been learning python for a few weeks but it seemed simple enough
to inspire me to be a bit ambitious. If you could hook me up with some
good docs that would be great. I was about to but a book on python,
specifically OO based, but il look at these docs first. I understand
most of the concepts of inheritance, just not ever used them before.

Thanks


From ivan.illarionov at gmail.com  Mon May 26 18:38:22 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:38:22 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com>
Message-ID: <g1fe4u$2cld$3@news.mtu.ru>

On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:

> On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
>> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
>> > > Thanks!
>> > > Anyone know which library should i learn then?
>>
>> > Looks like you need to dive into Win32
>> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
(VS.85).aspxhttp://ms...
>> > and others
>> > combined with ctypes.
>>
>> > Ivan
>>
>> well, that seems extremely valuable but how can i implement those
>> functions with python?
> 
> You know what I'm sorry, I will try to understand the ctypes lib before
> bothering you.
> 
> thank you all!

No need to sorry. I have actually found very valuable information at
http://www.brunningonline.net/simon/blog/archives/000652.html
while googling to answer your question. I didn't know that such things 
are really possible with Python/Win32! It'll help me a lot. Thank you!

Ivan


From george.sakkis at gmail.com  Mon May 12 21:16:01 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 18:16:01 -0700 (PDT)
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
	<mailman.1008.1210635369.12834.python-list@python.org>
Message-ID: <e0ea51fe-7279-434b-9e21-c15554624003@2g2000hsn.googlegroups.com>

On May 12, 7:35?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Ohad Frand" <ohad.fr... at percello.com> wrote in message
>
> news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
> | I am looking for a way to programmically get a list of all python
> | existing statements that I cannot access by __builtins__ or locals()
> | (like ["assert","break","class",...])
>
> You appear to want the keywords that begin statements. ?Look at the keyword
> list in the language reference and pick those you want. ?Then build that
> list into your program.

Someone already did it:

import keyword
print keyword.kwlist

George


From benjamin.kaplan at case.edu  Thu May 29 13:56:22 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 29 May 2008 13:56:22 -0400
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <ec96e1390805291056r48e3dbfh32a93ca7cf8724a9@mail.gmail.com>

On Thu, May 29, 2008 at 12:07 PM, <allendowney at gmail.com> wrote:

> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen
>  <http://mail.python.org/mailman/listinfo/python-list>


Definitely go with the new-style classes. Python 3 is coming out soon, which
doesn't have classic classes.

http://docs.python.org/dev/3.0/whatsnew/3.0.html#new-class-and-metaclass-stuff
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From zapwireDASHgroups at yahoo.com  Thu May 22 17:03:42 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 14:03:42 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<39vgg5-a9t.ln1@pluto.solar-empire.de>
Message-ID: <QclZj.148945$Gv.42177@en-nntp-07.dc1.easynews.com>

Hi Marc,

"Marc Christiansen" <usenet at solar-empire.de> wrote in message 
news:39vgg5-a9t.ln1 at pluto.solar-empire.de...
> I'm not sure I would recommend it, but try:
> [v for x in range(4) for v in (x, 2 * x)]

That certainly works... and it almost seems like a bit less of a hack (if 
perhaps somewhat harder to read) than the "sum" approach to flattening?

> A similar solution as above should work.

This is what I came up with:

>>> list1=[1,2,3]
>>> list2=[4,5,6]
>>> [j for (i,m) in enumerate(list1) for j in (m,list2[i])]
[1, 4, 2, 5, 3, 6]

Not exactly "clean" due to having to enumerate list1 to get the index for 
list2.  There may be a better method, of course -- so far I like Petter 
Otten's approach.

Thanks for the help,
---Joel




From Scott.Daniels at Acm.Org  Sat May 17 15:32:17 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 17 May 2008 12:32:17 -0700
Subject: working with images (PIL ?)
In-Reply-To: <g0f0ib$3im$1@aioe.org>
References: <g0f0ib$3im$1@aioe.org>
Message-ID: <tOGdnerHudwlrbLVnZ2dnUVZ_jidnZ2d@pdx.net>

Poppy wrote:
> I need to write a program to examine images (JPG) and determine how much 
> area is whitespace. We need to throw a returned image out if too much of it 
> is whitespace from the dataset we're working with. I've been examining the 
> Python Image Library and can not determine if it offers the needed 
> functionality. Does anyone have suggestions of other image libraries I 
> should be looking at it, or if PIL can do what I need? 
> 
> 
If PIL's "histogram" method doesn't give you a clue how you might do
this, hire someone to do it.

--Scott David Daniels
Scott.Daniels at Acm.Org


From musiccomposition at gmail.com  Thu May 29 22:47:52 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Thu, 29 May 2008 19:47:52 -0700 (PDT)
Subject: undocumented functions in pkgutil
References: <04d9dbd9-ad9c-4756-afa5-163800a785eb@t54g2000hsg.googlegroups.com>
Message-ID: <2b192ae3-14d3-4392-8d91-f9e0a9e81458@e53g2000hsa.googlegroups.com>

On May 29, 12:34 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> I see that the pkgutil module has many useful functions which are
> however undocumented.
> Does anybody know why it is so? In particolar, can I safely use
> pkg.walk_packages
> without risking a change of interface in the future? I looks unlikely,
> since pkgutil is
> used in setuptools, but I want to be sure before relying on it.

We don't change the API of undocumented functions. However, if you
find these functions useful and would like to work on documenting
these, please email docs at python.org.
>
>     Michele Simionato



From cmpython at gmail.com  Sun May  4 20:30:35 2008
From: cmpython at gmail.com (CM)
Date: Sun, 4 May 2008 17:30:35 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <30a3bab4-16a7-4f0d-8534-9b5e8df199cd@x35g2000hsb.googlegroups.com>

On May 4, 7:45 pm, notbob <not... at nothome.com> wrote:
> I'm trying to learn how to program.  I'm using:
>
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition
>
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.
>
> nb

Another good place to be aware of is the Python Tutor List, some great
people helping out there.  You can search the archive and/or subscribe
to
the list here:
http://www.nabble.com/Python---tutor-f2981.html

I've found learning from scratch is aided if you know what sorts of
things
you hope to do with programming and then work from within that, using
issues
germane to that area as building blocks.


From castironpi at gmail.com  Fri May 16 08:50:29 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 05:50:29 -0700 (PDT)
Subject: morning in Python
Message-ID: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>

I want to talk to the newsgroup.  As I have found that its readers
will be non-trivially attentive, I esteem it a worthwhile production,
for finely divided values of worth & while.  (Disclaimer: Don't call
me millionaire; life & money...).  It is not clear that I will be
posting code first thing, for a range of values of I.  (Yes I have
tackled decentralization and contribution in identity before.)

It's possible that I just like to write, in which case, fol. the
foregoing, I might just like to write messages, plainly ignorant of
who replies.  My name still works as castironpi, since I just don't
have e-mail.  For the plot, though, I do not know who's reading by
name.  If that makes me a villian, that's ok, mysteries are good.

I've evaluated *my* character, ladies & gentlemen, before.  I just
know the trick, which may originate in the older stories of night and
day.

First things first, I try to represent story lines, which involves
some non-trivial automation of computer-modeled intelligence.  It
involves live people too.  You might be reading.  I'm not.

>From what plans I come with, it takes a second to infer that I'm on
the newsgroup, which generates some purified roles.  This has some
consequences for my character upon entrance.  It also complicates the
matter of getting to Python, connecting me with a larger fraction of
the community.  I am on a computer and have made games.  I've tried
Pygame.

I have a proposition to ask you all: Python emphasizes state.  Is it
true?



From matthieu.brucher at gmail.com  Sat May 17 15:26:08 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sat, 17 May 2008 21:26:08 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <QZFXj.6721$255.5738@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
Message-ID: <e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>

Hi,

I did not manage to build extension with distutils with Python compiled with
VS different than 2003. The need for 2003 was hard-coded in distutils.
You can try building extensions with VS2008 with Scons. This is what I do a
lot, and everything works fine as long as the interface does not use
standard structures (like FILE, custom structures are fine) or objects
allocated in the extension is freed in the extension.

Matthieu

2008/5/17 inhahe <inhahe at gmail.com>:

>
> "Christian Heimes" <lists at cheimes.de> wrote in message
> news:mailman.1270.1211029209.12834.python-list at python.org...
> > inhahe schrieb:
> >> what is going on here, and how do I compile these external libraries?
> >
> > I assume you are trying to compile Python 2.5 with VS 9.0. It's not
> > supported. Some extensions don't compile under VS 9.0
> >
> > Christian
> >
>
> I just installed Visual Studio 8 and tried compling and I bgot the same
> problem.  hope this isn't a redundant post. i don't know if
> pyhon-list at python.org reposts here.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From gherron at islandtraining.com  Sat May 17 12:11:22 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 09:11:22 -0700
Subject: [PyOpenGL-Users] glGenLists returns 0
In-Reply-To: <482E82DE.5060000@al.com.au>
References: <482E82DE.5060000@al.com.au>
Message-ID: <482F03AA.60902@islandtraining.com>

Astan Chee wrote:
> Hi,
> Im trying to do glGenLists while a program is running and it keeps 
> returning 0 and whenever I try to do a glCallList, it fails with a 
> 'invalid value' error.
> Is this a known issue? why would my program give valid glGenList while 
> being initialized but not while it is running?
>   

IIRC,  this can happen if you call glGenLists *before* you create any 
windows (or perhaps more accurately, before an OpenGL context has been 
created).

> Im using wx to create a new pygame thread that uses pyopengl. This is 
> the glGenList snippet:
>
>             dlBody = glGenLists(1)           
>             glNewList(dlBody,GL_COMPILE)
>             SphereT = gluNewQuadric()
>             gluSphere(SphereT, 0.5, 32, 32)
>             gluQuadricNormals(SphereT, GLU_SMOOTH)
>             gluQuadricDrawStyle(SphereT, GLU_FILL)   
>             glEndList()
>
> and here is how I init:
>
>         glShadeModel(GL_SMOOTH)
>         glClearColor(0.0, 0.0, 0.0, 0.0)
>         glClearDepth(1.0)
>         glEnable(GL_DEPTH_TEST)
>         glDepthFunc(GL_LEQUAL)
>         glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
>
>         glEnable (GL_LIGHT0)
>         glEnable (GL_LIGHTING)
>         glEnable(GL_TEXTURE_2D)
>    
>         LightAmbient  = ( (0., 0., 0., 0.,1.) )
>         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, LightAmbient )
>    
>         glEnable(GL_COLOR_MATERIAL)
>
>         glViewport(0, 0, width, height)
>         glMatrixMode(GL_PROJECTION)
>         glLoadIdentity()
>         gluPerspective(45, 1.0*width/height, 1.0, 10000.0)
>         glMatrixMode(GL_MODELVIEW)
>         glLoadIdentity()
>
>   



From maxm at mxm.dk  Tue May 13 15:10:08 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 13 May 2008 21:10:08 +0200
Subject: Literate programs in Python
In-Reply-To: <e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
Message-ID: <g0cp2h$mki$1@ger.gmane.org>

Mike Driscoll skrev:
> On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>> Does anyone know of any (preferably largish) examples of literate
>> programs written using Python?  Alternatively, does anyone know of any
>> literate programming tools which support Python well?  (I am aware of
>> Leo and I've been to literateprogramming.com, but any additional
>> pointers would be much appreciated!)


I think that most people in Python use doctest. Personally I find this 
form of literal programming to be very efficient.

Like the example here:

http://codespeak.net/icalendar/example.html


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From kyosohma at gmail.com  Thu May 29 15:17:08 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 29 May 2008 12:17:08 -0700 (PDT)
Subject: Remote Debugging for python.
References: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>
Message-ID: <c2f1afcf-3467-40cd-b843-6ab354cd643a@2g2000hsn.googlegroups.com>

On May 29, 2:09?pm, nkarkhan <nkark... at gmail.com> wrote:
> Newbie to python here..so bear with me.
>
> I used to be able to gdb to a target machine running c/c++ code and
> see where my program was hanging, crashing, executing..
>
> How do I do that with python?
> I have multi-threaded python programs running on a remote machine. I
> want to se where they are at any instance.
>
> If remote debugging is too much to ask for.. what about local
> debugging?
> Can i break into an executing program and see at source-level where my
> pyhton program/process/thread is at?
>
> Thank you,
> Nitin.

I've never done this, but I some Google-fu and found this stuff:

http://hapdebugger.sourceforge.net/
http://wiki.python.org/moin/PythonDebuggers

I suppose you could add some logging code to your program as well and
check that from time to time.

Mike


From rajb at rice.edu  Mon May 12 12:47:45 2008
From: rajb at rice.edu (Raj Bandyopadhyay)
Date: Mon, 12 May 2008 12:47:45 -0400
Subject: Inconsistency in retrieving exceptions via sys module
Message-ID: <482874B1.4010504@rice.edu>

Hi

I am writing some C code which sets and retrieves a Python exception. I 
set the exception using PyErr_SetString(), and retrieve it in 2 ways: 1) 
using PyErr_Occurred() and 2) Using sys.exc_type. However, I get two 
different results and am very puzzled by this apparent inconsistency. 
Could anyone please clarify what I'm missing? I need both to work 
consistently for my application.

Here is the C code and the output

#include "Python.h"

#define OPRINT(o) PyObject_Print((o),stdout,0);printf("\n")

int main() {
    PyObject *sysmod,*etype1,*etype2;

    Py_Initialize();
    sysmod = PyImport_ImportModule("sys");
   
    PyErr_SetString(PyExc_Exception,"HI");      //set exception

    etype1 = PyObject_GetAttrString(sysmod,"exc_type");  //sys.exc_type
    etype2 = PyErr_Occurred();

    printf("sys.exc_type : "); OPRINT(etype1);
    printf("PyErr_Occurred() : "); OPRINT(etype2);
}


The output

sys.exc_type : None
PyErr_Occurred() : <type 'exceptions.Exception'>


Thank you
Raj
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From kenobi at gmail.com  Wed May 28 15:32:36 2008
From: kenobi at gmail.com (Rick Kwan)
Date: Wed, 28 May 2008 12:32:36 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org> 
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com> 
	<mailman.1647.1211894018.12834.python-list@python.org>
Message-ID: <5b0ffbf9-627e-484b-bd4c-895568a1a1a5@s21g2000prm.googlegroups.com>

On May 27, 6:13 am, Laura Creighton <l... at openend.se> wrote:
> In a message of Mon, 26 May 2008 12:38:28 PDT, miller.pau... at gmail.com writes:
>
> >I forgot to ask: what's your target platform?  I mentioned Organizer's
> >Database, but it only runs on Windows.  If you need a Linux or OS X
> >solution, then I can make another suggestion. :-)
>
> Ah, FreeBSD would be the best -- as in making our sysadmins very, very
> happy but linux would also be very acceptable, and probably OS X as well.
> But PHP is probably not.
>
> Thanks again,
> Laura

I've been up against similar issues.  I handle records for a 1,300-
member chapter of a 30,000-member organization.  So my original data
comes from the national organization as an Excel spreadsheet --
actually an pseudo-XML copy of the spreadsheet.

The first step I do is convert it into a file of tab-separated values
(TSVs, not CSVs) through use of the HTMLParser module.  From there,
I've built a series of Python scripts to generate e-mail lists,
mailing labels (with the help of C program), identify senior members
and fellows, etc.

None of it is web-accessible yet.  For me, I'd want to give certain
officers or committee chairs the ability to grab subsets of data on
their own, or allow them to send mail to their specific subset of the
membership.


From afrobeard at gmail.com  Wed May 28 07:48:10 2008
From: afrobeard at gmail.com (afrobeard)
Date: Wed, 28 May 2008 04:48:10 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
Message-ID: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>

The following following code fails with the failiure:-


File "test.py", line 27, in __main__.sanitize_number
Failed example:
    sanitize_number('0321-4683113')
Expected:
    '03214683113'
Got:
    '03214683113'


Expected and Got looks the same. The value should verify.  What am I
doing wrong here ?

Thanks in advance. I really appreciate your time.

P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
Windows XP


/////////////////// Code /////////////////////////////////

import os;
import string;

def sanitize_number(input_number):
    """
    Sanitize Number Module Please make Test Cases in Here

    >>> sanitize_number('0321-4683113')
    '03214683113'
    >>> sanitize_number('03214683113')
    '03214683113'
    >>> sanitize_number('0321-468-3113')
    '03214683113'
    >>> sanitize_number('0321 4683113')
    '03214683113'
    >>> sanitize_number('0321 468 3113')
    '03214683113'
    >>> sanitize_number('3214683113')
    '03214683113'
    >>> sanitize_number('923214683113')
    '03214683113'
    >>> sanitize_number('00923214683113')
    '03214683113'
    >>> sanitize_number('+923214683113')
    '03214683113'
    >>> sanitize_number('+923214+683113')
    False


    """

    countries = {
        '92' : 'Pakistan'
        }

    """
        Reference http://en.wikipedia.org/wiki/List_of_mobile_codes_in_Pakistan
        Please update original wiki article if more codes are
discovered
    """
    providers = {
        '300' : 'Mobilink',
        '301' : 'Mobilink',
        '302' : 'Mobilink',
        '306' : 'Mobilink',
        '307' : 'Mobilink',
        '308' : 'Mobilink',
        '309' : 'Mobilink',
        '342' : 'Telenor',
        '343' : 'Telenor',
        '344' : 'Telenor',
        '345' : 'Telenor',
        '346' : 'Telenor',
        '321' : 'Warid',
        '322' : 'Warid',
        '323' : 'Warid',
        '331' : 'Ufone',
        '332' : 'Ufone',
        '333' : 'Ufone',
        '334' : 'Ufone',
        '313' : 'Zong',
        '314' : 'Zong',
        '320' : 'Instaphone',
        '335' : 'SCOM'
        }

    #Rule 1 Numbers can only contain spaces, + and

    input_number = string.join(input_number.split(), '') # Split
Spaces and join
    input_number = string.join(input_number.split('-'),'') # Split
Spaces and join

    #print "After Split Join", input_number

    if input_number.startswith('00'):
        input_number = input_number[2:]
    elif input_number.startswith('0'):
        input_number = input_number[1:]
    elif input_number.startswith('+'):
        input_number = input_number[1:]

    #print "Phase1", input_number

    #The number should now have either 10 or 12 digits depending on
whether or not country code is included

    if len(input_number) == 10 or len(input_number) == 12:
        if len(input_number) == 12:

            for code in countries.keys():
                if input_number.startswith(code):
                    input_number = input_number[2:]
                    break;
                else:
                    return False # Country Code not Supported

        for code in providers.keys():
                if input_number.startswith(code):
                    #input_number = input_number[3:]
                    input_number = '0'+input_number
                    #print "Result", input_number
                    return input_number

    return False

#print sanitize_number('+923214+683113') == False


def _test():
    import doctest
    doctest.testmod()

if __name__ == "__main__":
    _test()


From greg at cosc.canterbury.ac.nz  Sat May 17 06:14:07 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 17 May 2008 22:14:07 +1200
Subject: ANN: Pyrex 0.9.8.1
Message-ID: <mailman.1273.1211036597.12834.python-announce-list@python.org>

Pyrex 0.9.8.1 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Base classes no longer need to be specified in a forward
declaration of an extension type, or in the implementation
part of an extension type defined in a .pxd file.

Also, I've come up with an even better way of handling
circular cimports involving structs, unions and extension
types. You can now say things like

   from spam import struct Foo, union Blarg, class Ham

This simultaneously imports the name and forward-declares
it in the other module.


What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From castironpi at gmail.com  Sat May  3 19:39:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 3 May 2008 16:39:43 -0700 (PDT)
Subject: generator functions in another language
Message-ID: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>

I'm actually curious if there's a way to write a generator function
(not a generator expression) in C, or what the simplest way to do it
is... besides link the Python run-time.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 10:58:00 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 16:58:00 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <4836c28e$0$25161$c3e8da3@news.astraweb.com>
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
Message-ID: <4836db5e$0$12593$426a74cc@news.free.fr>

John Salerno a ?crit :
> "Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
> message news:4836747b$0$15488$426a74cc at news.free.fr...
>> Ever heard of the "Model/View/Controller" pattern ?
> 
> Yes, I have, but I probably don't understand it well enough yet. For 
> example, I don't  really know what is meant by phrases like "build a model",

An abstract, logical representation of your board and players, which 
have a state (ie : board has X cells, player1 is on cell (x, y) and 
player2 on cell (x', y')) and behaviour (ie : player2.move_to(x, y)) 
that changes the state.

> "the view registers itself with the model",

This is the Observer pattern. The view is passed the model when 
instanciated, and calls model.register(self). When the model changes 
it's state, it calls back the '.notify()' method of each of the 
registered views (a same model can have multiple views at the same time).

> "interactions are sent to the 
> appropriate controller"

In a typical GUI, the controllers are the event handlers (or are called 
from the event handlers - depending on how the GUI works). The system 
dispatch the events to the appropriate event handlers.

> -- I may understand them literally, but I get the 
> feeling that the implementation of these ideas are beyond me. I think it's 
> mainly an issue of terminology, so probably I should just read up on MVC.

Probably, yes !-)



From frikker at gmail.com  Mon May 19 20:42:28 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 17:42:28 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org> 
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com> 
	<7xtzgtyjtx.fsf@ruckus.brouhaha.com>
	<mailman.1369.1211242829.12834.python-list@python.org>
Message-ID: <347817de-bf76-44c2-81f2-c2966f62cad2@x41g2000hsb.googlegroups.com>

On May 19, 8:16 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 19 May 2008 20:07:06 -0300, Paul Rubin
> <"http://phr.cx"@NOSPAM.invalid> escribi?:
>
> > blaine <frik... at gmail.com> writes:
> >> How is it that you recommend killing a pure python thread?
>
> Make the thread cooperate. It should periodically check some variable or
> condition, and cleanly exit when requested.
>
> >> And also,
> >> when i use the 'threading' module am I creating a process, or a (gasp)
> >> thread?
>
> > A thread.
>
> >> (Is this an obvious question - and if so, how does one create
> >> a 'process'?)
>
> > os.fork()
>
> A more portable answer: using the subprocess module.
>
> --
> Gabriel Genellina

Thanks for the info.  The problem that I'm having is that I get a
thread stuck blocking - waiting for a return from a FIFO (made with
os.mkfifo()).

Blaine


From usenet at technicalbloke.com  Mon May 19 12:36:21 2008
From: usenet at technicalbloke.com (Roger Heathcote)
Date: Mon, 19 May 2008 17:36:21 +0100
Subject: Thread killing - I know I know!
In-Reply-To: <6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
Message-ID: <D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>

sjdevnull at yahoo.com wrote:
> On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
> wrote:<snip>
>> Despite many peoples insistence that allowing for the arbitrary killing
>> of threads is a cardinal sin and although I have no particular threading
>> problem to crack right now I remain interest in the taboo that is thread
>> killing. The real world and it's data are messy and imperfect and I can
<snip>
> In general, use processes when you can and threads only when you
> must.  OS designers spent a lot of energy implementing protected
> memory, no sense throwing out a fair chunk of that hard work unless
> you actually need to.

Fair point, but for sub processes that need to be in close contact with 
the original app, or very small functions that you'd like 100s or 1000s 
of it seems like a kludge having to spawn whole new processes build in 
socket communications and kill via explicit OS calls. I can't see that 
approach scaling particularly well but I guess there's no choice.

Does anyone think it likely that the threading module (and threading in 
general) will be improved and augmented with features like timeouts and 
arbitrary threadicide in the next year or two?  Seems there's little 
scope for tapping the power of the current generation of multiple cores 
with the current pythons, tho I appreciate breakneck speed has never 
been a design objective it looks like multicore is set to be the next 
generation PC architecture.

Roger Heathcote - technicalbloke.com


From aguirre.adolfo at gmail.com  Wed May  7 20:55:35 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 17:55:35 -0700 (PDT)
Subject: DISLIN 9.3 stuck
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
	<48214644$0$11610$3b214f66@aconews.univie.ac.at>
Message-ID: <cda9b76c-d9e3-4f55-990d-586a5b8b6708@s50g2000hsb.googlegroups.com>

On May 7, 2:03 am, Weinhandl Herbert <weinh... at unileoben.ac.at> wrote:
> adolfo wrote:
> > I built the following little program:
>
> > from numpy import *
> > fromdislinimport *
>
> > def main():
> >     x = arange (100, typecode=Float32)
> >     plot (x, sin (x/5))
> >     disfin ()
>
> > main()
>
> > *** Here are the problems:
>
> > 1. The "from Numeric import" statement did not work, I replaced with
> > "from numpy import*" and no complains form the interpreter.
>
> > 2. If I enyter "fromdislinimport *" I get:
> >  Traceback (most recent call last):
> >   File "<pyshell#0>", line 1, in <module>
> >     fromdislinimport *
> > ImportError: No module nameddislin
>
> > I checked the environmental variables paths and it all seems Ok:
> > c:\dislin
> > SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
> > \Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
> > PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python
>
> the environment variable is PYTHONPATH and i has to contain the directory
> where thedislin.pyd module can be found;

** Thank you for the comments:
1- The strange thing is that I went to the dislin directory in the C:
drive and there was no disli.pyd file anywhere. I found the file in
the My Documents subdirectory where I had originally unzipped the
dislin archived files I downloaded and from where I run the setup.

> you should set environment variableDISLINtoo
> (see python.inf, which you can find in thedislin-distribution)

2 - Well I have followed the DISLIN 9.3 inf file for Python 2.5.2 for
Windows. It contains commands for a unix command line "unzip -o
dl_93_py.zip setup first and then... " and then:

" Windows 98/ME

        Add the following commands to the autoexec.bat file

        PATH=c:\dislin\win;%PATH%
        SET DISLIN=c:\dislin
        SET PYTHONPATH=c:\dislin\python

     Windows NT/2000/XP/Vista

        The environment variables can be set or modified with the
        Control Panel
        (see -> Control Panel -> System -> Advanced -> Environment
        Variables)."

 *** I have followed all these directions but DISLIN still does not
shop up as a module when making the Python calls.

It keeps me entertained in spite that my productivity is cero ;-)

Adolfo

>
> depending on your python version (2.4 or 2.5) you need the correctdislin-distribution, becausedislinis a fortran/c library with
> a layer for python access.
>
> and try some examples of the distribution (they are importing onlydislin
> and math modules).
>
> hth
>
> Herbert



From saikia at unspokenmind.net  Thu May  8 16:42:17 2008
From: saikia at unspokenmind.net (Amitabh Saikia)
Date: Thu, 8 May 2008 13:42:17 -0700
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
	<237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
	<ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>
Message-ID: <237596740805081342v66d97312ibf887bbbd30e2b3a@mail.gmail.com>

Cron is best for this, and you should be able to create a crontab for
yourself. If your system admin has not enabled user level crons. Then
write a shell-script or python

Shell version
-----------------
count=0
max_number_of_times
while [ $count < $max_number_of_times ];
do
  your_command &
  sleep <time_interval>
  count=`expr $count + 1`
done

I said about nohup, in case you want to logout and still want this to work.
You can also use `screen' (only in the case where you are planning to logout
and you want your program should run).

- saikia

--


On Thu, May 8, 2008 at 9:12 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:

> Can you please explain it a little more? I do not have that much
> experience! I really appreciate it if you can share a sample code if you
> have one.
>
> Thanks
>
> On Thu, May 8, 2008 at 11:07 AM, Amitabh Saikia <saikia at unspokenmind.net>
> wrote:
>
>> write a bash script(to run your program at intervals) and run the bash
>> script with nohup
>>
>> - saikia at unspokenmind.net
>>
>> On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com>
>> wrote:
>>
>>> I was wondering if you know how can I run a python code once every five
>>> minutes for a period of time either using python or some other program like
>>> a bash script.
>>>
>>> I have asked this question before and some of you answered me but I still
>>> have problem. Most of the answers was to use cron and crontab which works on
>>> my computer but not if I want to do it on department's computer since I do
>>> not have permission to change those files. Is there any other way which does
>>> not need administrator permission?
>>>
>>> Thanks  a lot,
>>>
>>> Maryam
>>>
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>
>>
>
>
> --
> Maryam Saeedi
> PhD student
> Economics Department
> University of Minnesota
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From dieter at handshake.de  Tue May 13 14:21:53 2008
From: dieter at handshake.de (Dieter Maurer)
Date: 13 May 2008 20:21:53 +0200
Subject: The Importance of Terminology's Quality
In-Reply-To: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <x7iqxikqta.fsf@handshake.de>

"xahlee at gmail.com" <xahlee at gmail.com> writes on Wed, 7 May 2008 16:13:36 -0700 (PDT):
> ...
> Let me give a few example.
> 
> ? ?lambda?, widely used as a keyword in functional languages, is named
> just ?Function? in Mathematica. The ?lambda? happend to be called so
> in the field of symbolic logic, is due to use of the greek letter
> lambda ??? by happenstance. The word does not convey what it means.
> While, the name ?Function?, stands for the mathematical concept of
> ?function? as is.

"lambda" is not a function, but an operator with two operands, a variable
name and an expression resulting in another expression
which behaves like a function (the abstraction
of the variable name in the expression).


Dieter


From skanemupp at yahoo.se  Fri May  2 12:37:07 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 09:37:07 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
Message-ID: <bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>

On 2 Maj, 18:13, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev schrieb:
>
> > if pygame.key.get_pressed[K_a]:
> >             print "Muppet"
>
> > K_a is not defined.
>
> > but yes it is. why do i get this error?
>
> No it isn't - otherwise you wouldn't get this error, wouldn't you?
>
> What IS defined is
>
> pygame.K_a
>
> Or if you do
>
> from pygame import K_a
>
> then K_a is defined as well.
>
> Diez

ok thanks
if (key.get_pressed[K_t] and key.get_pressed[K_f]):
     print "Yup!"

said int he tut it confused me.


anyway i changed it and the list or dict from keygetpressed is all
zeros but the K_a always is true whether i push it or not.






From jake at vapourforge.com  Thu May 22 04:14:30 2008
From: jake at vapourforge.com (Jake Anderson)
Date: Thu, 22 May 2008 18:14:30 +1000
Subject: Returning to 'try' block after catching an exception
In-Reply-To: <485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <48352B66.9050601@vapourforge.com>

alex23 wrote:
> On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>   
>> In case it's not clear what I meant: after executing some_function()
>> exception SomeExcpetion gets risen. Then, in except block I do something
>> to fix whatever is causing the exception and then I would like to go back
>> to try block, and execute some_function() again. Is that doable?
>>     
>
> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
There are cases where this could be helpful
FTP upload that would sometimes get cut off along the way. So you might 
want to just try again depending on why the failure happened perhaps.

Command of "ReTry" sounds good to me ;->
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From sprinkles.chris at gmail.com  Fri May  9 16:13:43 2008
From: sprinkles.chris at gmail.com (Chris Sprinkles)
Date: Fri, 9 May 2008 16:13:43 -0400
Subject: how to call a text file
Message-ID: <a5bfba430805091313r62b018bfh86dff3540595fbc7@mail.gmail.com>

I need to know how to call a text file called txt_file.do I just put the
directory that it is in like C:\documnet\blah\blah ???

cars_file = open()

# i will be our line counter so we know when to pause
i = 0

print

for line in cars_file:

   i = i + 1      # increment i by 1 at each line

   print line

   if i == 5:    # change 5 to whatever you think is adequate

        i = 0      # zero the counter
        print
        raw_input("Hit Enter to continue: ") # wait for the user
        print

print
cars_file.close()
-Chris-
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From richard.speaker at sbcglobal.net  Thu May  8 10:07:40 2008
From: richard.speaker at sbcglobal.net (Richard Speaker)
Date: Thu, 8 May 2008 07:07:40 -0700 (PDT)
Subject: Troubles with 'self'
Message-ID: <467304.16209.qm@web81401.mail.mud.yahoo.com>

I'm somewhat new to Python... and programming in general.  I know enough to be dangerous for sure. I have a feeling the solution to this is simple.  I'm having trouble getting 'self' to initialize or work in a class application. I keep getting the message:
   
      LogFile = self.BasicSummary ( )
NameError: name 'self' is not defined
   
  Code looks like this:
   
  from data_decode import *
  class DataAnalysis:
        
        def PainInTheArse ( self , i , InvI ):
                """This is a filter I made to overcome
                some problems I was having with sine wave
                analysis"""
                TemporaryData = [ ]
                for a in range ( int ( InvI [ i ] ) , len ( InvI ) ):
                        if a < 0:
                                a = 0
                        b = a + 1
                        try:
                                TemporaryData.append ( InvI [ a + i ] )
                                if ( InvI [ b + i ] < 0 and InvI [ b + i + 1 ] > 0 ):
                                        TemporaryData.append ( InvI [ a + i + 1 ] )
                                        break
                        except IndexError:
                                continue
                return TemporaryData
          def GetTheInvIData ( self , InvI ):
                  """"Function determines zero-crossing, and then
                calculates the +/- peaks to get an average """
                CurrentMaxList = [ ]
                CurrentMinList = [ ]
                for i in range ( 0 , len ( InvI ) ):
                        try:
                                if ( InvI [ i ] <= 0 and InvI [ i + 1 ] > 0 ):
                                        TemporaryData = self. PainInTheArse ( i , InvI )
                                        BetterData = self.FilterTheBS ( TemporaryData )
                                        CurrentMaxList.append ( max ( BetterData ) )
                                        CurrentMinList.append ( min ( BetterData ) )
                        except IndexError:                        
                                continue
                  MeanCurrentMax = sum ( CurrentMaxList ) / len ( CurrentMaxList )
                MeanCurrentMin = sum ( CurrentMinList ) / len ( CurrentMinList )
                InvIPeakToPeak = MeanCurrentMax - MeanCurrentMin
                EstPeak = InvIPeakToPeak / 2
                return EstPeak
   
          def FilterTheBS ( self , TemporaryData ):
                """This is another filter I made to overcome
                some problems I was having with sine wave
                analysis"""
                BetterData = [ ]
                UselessData = [ ]
                for i in range ( 0 , len ( TemporaryData ) ):
                        try:
                                if TemporaryData [ i ] == TemporaryData [ i + 1 ]:
                                        UselessData.append ( TemporaryData [ i ] )
                                else:
                                        BetterData.append ( TemporaryData [ i ] )
                        except IndexError:
                                BetterData.append ( TemporaryData [ i ] )
                                continue
                return BetterData
          def BasicSummary ( self ):
                
                DDC = DecodeData( )
                  try:
                          MeanCurrent_A = float ( ( self.GetTheInvIData ( DDC.InvIa ) ) )
                        MeanCurrent_B = float ( ( self.GetTheInvIData ( DDC.InvIb ) ) )
                        MeanCurrent_C = float ( ( self.GetTheInvIData ( DDC.InvIc ) ) )
  except ValueError:
   print'KaFlewie!'
                LogFile = []
                LogFile.append ('DEVICE CURRENT SUMMARY:\n')
                LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % ( MeanCurrent_A ) )
                LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % ( MeanCurrent_B ) )
        
                  return LogFile
        
        LogFile = self.BasicSummary ( )
          for a in LogFile:
  print a
          
        
any and all advice is welcome
   
  Rick
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From arnodel at googlemail.com  Sat May 24 07:44:43 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 24 May 2008 12:44:43 +0100
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<nsbd349tlkc5o7h280f71h7aoov1vnavon@4ax.com>
Message-ID: <m28wy06i50.fsf@googlemail.com>

Michael Fesser <netizen at gmx.de> writes:
> you don't like PHP, that's perfectly OK. But you should accept that
> it's only a tool and just as good as the one who uses it. For me and
> many others it's a quite good language, we're able to write clean and
> efficient code with it in a rather short time.

I'm sure that anyone who is competent enough can write clean code in
any language (in the case of PHP, I am only familiar with one
significant example: I use and have written a few simple extensions
for mediawiki, and I find it quite easy to understand and navigate the
code).

However, while I feel that most languages are quite neutral about
this, I find that Python *encourages* me to write better code.  In
other words, Python is not only a tool, it's also a lovely language.

Languages are a bit like shoes.  You probably wouldn't want to wear the pair
I'm most comfortable in!

-- 
Arnaud


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 04:03:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 10:03:36 +0200
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
In-Reply-To: <slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
Message-ID: <482010d3$0$12566$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>>  I've gone through the list of "language differences" between 2.3 / 2.4
>>  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
>>  CPython, and I consider myself still very very newbie. So, unable to
>>  take a call as to how-important or desirable the newer language
>>  features are -- so whether to write my app for v2.5 of Python, versus,
>>  as few others on this list have recommended, i.e. to stick to v2.3 ??
>>  Are the preformance improvements, and memory footprint / leak fix in
>>  2.5 enough to justify moving to it ? What all do I stand to lose (or
>>  gain) by writing on v2.3 ??
> 
> If you are writing for 2.3 you are writing for 2.4 and 2.5 also.
> 
> There are some nice things in 2.4 and 2.5 but nothing you really need
> IMHO.  

There are some nice things in Python but nothing you really need neither 
- could have the same result in C or assembly !-)

<OP>
Ok, if you're newbie to programming, the new stuff in 2.4 and 2.5 might 
not be that useful to you right now. But the real question is mostly: do 
you have any reason to stick to 2.3 ?
</OP>

>>  I've a constraint due to which I might have to also write parts of my
>>  app (client side) in Jython (because I want to eventually ship Java --
>>  yet benefit from the rapid development and clarity of Python). Would
>>  sticking to v2.3 in such a case be a better idea ? Suggestions with
>>  reasoning would be very helpful.
> 
> Jython seems to be based off python 2.2

It is so far. But Sun recently hired Jython's maintainers, so we may 
have a much more up to date Jython version in a foreseeable future.



From Scott.Daniels at Acm.Org  Sat May  3 22:36:45 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 03 May 2008 19:36:45 -0700
Subject: Python documentation
In-Reply-To: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
References: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
Message-ID: <svCdnfHc393SgoDVnZ2dnUVZ_sOrnZ2d@pdx.net>

admin at remembernobody.com wrote:
> I have been learning python for some time using the dive into python
> book. I am interested to know if anyone can recommend a book which
> covers more advanced topics like threading and potentially GUI style
> coding....
If you don't at least browse "The Python Cookbook," you are missing
a chance at something you'll find great.  Note, I am strongly of the
opinion that what makes a book great is anachronistic, so check it out
before you buy.

I love information-dense books like Knuth, Strunk & White, and the
original C manual.  I know people who hate these.  I think of them as
technical poetry, rather than prose.  My guess is that Alex Martelli
(editor for the most recent cookbook) is not discoursive enough for
some; I appreciate that fact and understand others are in the "we read
Knuth so you don't have to" camp.  personally, I've loved most hours
I've spent on Knuth -- I'd hate to deprve anyone of that experience.

-Scott David Daniels
Scott.Daniels at Acm.Org


From badmuthahubbard at gmail.com  Tue May  6 08:38:36 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 6 May 2008 15:38:36 +0300
Subject: Another MIDI question - soundfonts
Message-ID: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>

Hello.

I'm writing a microtonal sequencer, and I don't want to use MIDI per
se, but I'd like to be able to load standard sample banks to play.
The only standard format I'm familiar with is soundfont, and it seems
to be the most popular; if anyone knows of others, especially for Mac,
which I believe most of my software's users will be using, I'd love to
know about it.
And, does anyone know a python module that will allow me to load in
soundfont files and make use of their info?  I'd like to be able to
remap the pitches, of course, but using the same presets and such.

Thanks.
-Chuckk

-- 
http://www.badmuthahubbard.com


From stef.mientki at gmail.com  Mon May 19 15:07:05 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Mon, 19 May 2008 21:07:05 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4831CFD9.4080608@gmail.com>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
If I look at the answers and
if I skip the web designs, which in my opinion are almost pure GUI ;-) ,
it would be interesting to know,
which of the mentioned applications of non-GUI programs
are used by others than the programmer him/herself.

cheers,
Stef


From banibrata.dutta at gmail.com  Thu May  8 04:37:30 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Thu, 8 May 2008 14:07:30 +0530
Subject: Python module for SNMP bindings ?
Message-ID: <3de8e1f70805080137p2fb97bc6x8d1399090edce7d2@mail.gmail.com>

Hi,

While looking around for Python API's to do SNMP, found the following link
with a high level comparison --
http://urchin.earth.li/~twic/SNMP_in_Python.html

i.e. options seems to be: PySNMP (complete SNMP impl.), SNMPy, yapSNMP
(Net-SNMP bindings).

Of those, yapSNMP seems to be most promising. Any comments ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From arne at vajhoej.dk  Sat May 31 20:43:22 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Sat, 31 May 2008 20:43:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <g1ru8v0v3l@news4.newsguy.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
Message-ID: <4841f0aa$0$90274$14726298@news.sunsite.dk>

szr wrote:
> Peter Duniho wrote:
>> On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:
>>> Arne Vajh?j wrote:
>>>> Stephan Bour wrote:
>>>>> Lew wrote:
>>>>> } John Thingstad wrote:
>>>>> } > Perl is solidly based in the UNIX world on awk, sed, } > bash 
>>>>> and C. I don't like the style, but many do.
>>>>> }
>>>>> } Please exclude the Java newsgroups from this discussion.
>>>>>
>>>>> Did it ever occur to you that you don't speak for entire news
>>>>> groups?
>>>> Did it occur to you that there are nothing about Java in the above ?
>>> Looking at the original post, it doesn't appear to be about any
>>> specific language.
>> Indeed.  That suggests it's probably off-topic in most, if not all,
>> of the newsgroups to which it was posted, inasmuch as they exist for
>> topics specific to a given programming language.
> 
> Perhaps - comp.programming might of been a better place, but not all 
> people who follow groups for specific languages follow a general group 
> like that - but let me ask you something. What is it you really have 
> against discussing topics with people of neighboring groups? Keep in 
> mind you don't have to read anything you do not want to read. [1]

I very much doubt that the original thread is relevant for the Java
group.

But the subthread Lew commente don was about Perl and Unix. That is
clearly off topic.

Personally I am rather tolerant for topics. But I can not blame Lew
for requesting that a Perl-Unix discussion does not get cross posted
to a Java group.

>> Regardless, unless you are actually reading this thread from the
>> c.l.j.p newsgroup, I'm not sure I see the point in questioning
>> someone who _is_ about whether the thread belongs there or not.
> 
> I would rather have the OP comment about that, as he started the thread. 
> But what gets me is why you are against that specific group being 
> included but not others? What is so special about the Java group and why 
> are you so sure people there don't want to read this thread? [1] What 
> right do you or I or anyone have to make decisions for everyone in a 
> news group? Isn't this why most news readers allow one to block a 
> thread?

I doubt Lew read any of the other groups, so it seems quite
natural that he did not comment on the on/off topic characteristics
in those.

>> And if it's a vote you want, mark me down as the third person reading
>> c.l.j.p that doesn't feel this thread belongs.  I don't know whether
>> Lew speaks for the entire newsgroup, but based on comments so far,
>> it's pretty clear that there unanimous agreement among those who have
>> expressed an opinion.
> 
> Ok, so, perhaps 3 people out of what might be several hundred, if not 
> thousand (there is no way to really know, but there are certainly a lot 
> of people who read that group, and as with any group, there are far more 
> readers than there are people posting, so, again, just because you or 
> two other people or so don't want to read a topic or dislike it, you 
> feel you can decide for EVERYONE they mustn't read it? Again, this is 
> why readers allow you to ignore threads. Please don't force your views 
> on others; let them decide for themselves. [1]

And I am sure that Lew did not intended to pretend to speak for
the entire group. He spoke for himself.

I believe there has been several posts that agreed with him and none
that disagreed, so it seems very plausible that the group indeed agree
with him.

Arguing that a huge silent majority has a different opinion
than those speaking up is a very questionable argument. Everybody
could try and count them for their view. The only reasonable
thing is not to count them.

Arne


From iman.darabi at gmail.com  Tue May 13 02:10:39 2008
From: iman.darabi at gmail.com (Iman)
Date: Mon, 12 May 2008 23:10:39 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
	<4d3eba3d-80bc-4cb4-a2ef-abf1827f9cfd@24g2000hsh.googlegroups.com>
Message-ID: <34195d16-8941-4d3b-bf6e-5cf3b7c4bba4@k10g2000prm.googlegroups.com>

On May 12, 4:50?pm, Gerry <gerard.bl... at gmail.com> wrote:
> Many city travel surveys collect source destination trip-start data;
> you might be able to find one of these studies.
>
> I think each car in your simulation should have a destination. ?Then
> the simulation needs a route-finder, and cars can progress along their
> routes as traffic permits -- or even change routes if traffic seems
> too slow.

yes, we should have destinations for cars. but my goal is my
agents(cars) can recognize non-movable objects ( for example ) so
change it's path or stop when light is red.
i can add lots of if-then-else in my code to action in these
situations but thought maybe there are some patterns or books which is
talking about these topics...

>
> I think if you start with a very small city -- perhaps just a 5 by 5
> grid, and generate sources and destinations at intersections randomly
> along the perimeter, you'll have enough to prototype all of the
> building blocks.

>
> Gerry
>
> On May 12, 6:37 am, Iman <iman.dar... at gmail.com> wrote:
>
> > hi
> > i'm working on some simulation project . i'm going to simulate traffic
> > of a city.
> > this simulation has cars , passengers , non-movable objects and
> > Traffic signals ?.
> > i've made cars as intelligentagent. it has thinking method ,
> > changing states agents ...
> > the main problem is i have problem to move my agents in world .
> > it would be possible to add some method toagentwhich move ?agentin
> > random ?destination .
> > but i'm trying to find some patterns which is designed ?for this
> > problems .
> > is there any sample source code in python or links, docs to help me ?
> > ?thanks for your attention .



From deets at nospam.web.de  Tue May 20 10:38:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:38:08 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
	<g0ub8q$f8n$1@news.lysator.liu.se>
Message-ID: <69g63gF2v4102U3@mid.uni-berlin.de>

Thomas Bellman wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> bearophileHUGS at lycos.com wrote:
> 
>>> The Example 2 builds a list, that is then thrown away. It's just a
>>> waste of memory (and time).
> 
>> No, it doesn't. It uses append because it refers to itself in the
>> if-expression. So the append(c) is needed - and thus the assignment
>> possible but essentially useless.
> 
> Yes it does.  A list comprehension *always* creates a list.  In
> this case it will be a list of None, since that is what list.append()
> returns.  See this:

Yep - no idea how that slipped me. I still don't mind the occasional waste
of a list-creation over a more concise looping-construct, but I totally
admit that one has to be aware of this. more than I was....

Diez


From upton at virginia.edu  Tue May 13 13:35:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 13:35:32 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <87d4nqgllh.fsf@physik.rwth-aachen.de>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
	<87d4nqgllh.fsf@physik.rwth-aachen.de>
Message-ID: <5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>

On Tue, May 13, 2008 at 1:28 PM, Torsten Bronger
<bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
>
>  Dave Parker writes:
>
>  >>  Notice that I said "free software", not "*** FREE *** software
>  >> !!!!  1!" (that is, free as in freedom, not free as in
>  >> beer). Read again my answer, considering this.
>  >
>  > I misread your meaning.
>
>  ... twice.  Flaming Thunder itself is not free software, is it?
>
>

For Dave, from FSF:

Free software is a matter of the users' freedom to run, copy,
distribute, study, change and improve the software. More precisely, it
refers to four kinds of freedom, for the users of the software:

    * The freedom to run the program, for any purpose (freedom 0).
    * The freedom to study how the program works, and adapt it to your
needs (freedom 1). Access to the source code is a precondition for
this.
    * The freedom to redistribute copies so you can help your neighbor
(freedom 2).
    * The freedom to improve the program, and release your
improvements to the public, so that the whole community benefits
(freedom 3). Access to the source code is a precondition for this.

Now that we're all on the same page, maybe third time's the charm for
a response about FT not being free...


From space.captain.face at gmail.com  Fri May 30 07:31:15 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Fri, 30 May 2008 04:31:15 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
	<mailman.1760.1212123838.12834.python-list@python.org>
Message-ID: <702c030b-1575-4534-b536-bd1de9db7372@b5g2000pri.googlegroups.com>

On May 30, 3:03 pm, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> Kalibr wrote:
> > On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
> >> You can use the shell COM objects to access media properties
> >> as shown by Explorer.
>
> >> import win32com.client
> >> sh=win32com.client.Dispatch('Shell.Application')
>
> >> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> >> ns=sh.NameSpace(folder)
>
> >> ## the column index for Artist may vary from folder to folder
> >> for c in range(0,255):
> >>     colname=ns.GetDetailsOf(None, c)
> >>     if colname=='Artists':  ## This shows up as just Artist on XP
> >>         for i in ns.Items():
> >>             artist=ns.GetDetailsOf(i, c)
> >>             if artist:
> >>                 print ns.GetDetailsOf(i, 0), artist
> >>         break
>
> >>             Roger
>
> > I shall give that a go. (is the module you reference this one?
> >http://python.net/crew/mhammond/win32/Downloads.html)
>
> If you installed ActiveState's Python, the win32com module should be
> installed.
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I gave your program a go, and it works magnificently.
Now I have to figure out how tro use it on a song by song basis
(I still suck at using classes).
Thanks so much for your help.


From inhahe at gmail.com  Thu May 22 20:01:01 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:01:01 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
	<vochg5-bo9.ln1@buckbeak.hogwarts>
Message-ID: <TNnZj.13936$hv2.7731@bignews5.bellsouth.net>


> Apparently, args already is a tuple, so this should be:
>
>  def __getitem__(self, args):
>
> Is this documented somewhere? I couldn't find it anywhere.
>

Don't know, I just assumed it would take multiple arguments because I knew I 
had seen the form d[1,2] before, which incidentally is equivalent to 
d[(1,2)] so  I guess it makes sense that args is a tuple.





From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 03:35:18 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 09:35:18 +0200
Subject: Hungarian Notation
In-Reply-To: <4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
Message-ID: <483d0b31$0$30932$426a74cc@news.free.fr>

Dan Bishop a ?crit :
> On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:
>> Does anybody know of a list for canonical prefixes to use for hungarian
>> notation in Python?  Not that I plan to name all my variables with hungarian
>> notation, but just for when it's appropriate.
> 
> pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
> vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.

Mouarf ! Keyboard ! (and +1 QOTW BTW)


From grante at visi.com  Thu May 15 13:37:42 2008
From: grante at visi.com (Grant Edwards)
Date: Thu, 15 May 2008 12:37:42 -0500
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
Message-ID: <S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>

On 2008-05-15, p.wallstedt at gmail.com <p.wallstedt at gmail.com> wrote:

> I have a small but rather annoying problem with pyserial. I want to
> open a file on disk for reading and then open a com-port, write lines
> from the file to the port and then read something back and compare it
> to the next line in the file. Should be simple. And it is, apart from
> the fact that the file seems to be doubled ...? Or it loops through
> the file twice.
>
> If I exclude the "import serial" it works.
>
> Any ideas?

Your problem is in line 117 of your program.

-- 
Grant Edwards                   grante             Yow! Hmmm ... an arrogant
                                  at               bouquet with a subtle
                               visi.com            suggestion of POLYVINYL
                                                   CHLORIDE ...


From bockman at virgilio.it  Sun May 11 03:19:22 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 11 May 2008 09:19:22 +0200
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>
	<ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com>
Message-ID: <pan.2008.05.11.07.19.22.159479@virgilio.it>

On Sat, 10 May 2008 18:09:02 -0700, frankdmartinez wrote:

> Hi, Terry.
>     Yeah, no.  If we think of the inherited B as an object nested
> within a1, I'm attempting to initialize that B with b1 by accessing
> the B, say, via a function call.  I don't see how using a python
> factory achieves this.

But there is not such a thing, in Python. What you have is that A
has the same attributes/methods of B plus its own. 
What you could do is  adding in class A a method like this:

  class A(B):
     ...
     def set_b_attributes(self, instance_of_b):
         for k, value in instance_of_b.__dict__:
		setattr(self, k, value )

and the use it like this:

   a1.set_b_attributes(b1)

Of course, if b attributes are few and always the same it is more
readable assigning them explicitely:

     def set_b_attributes(self, instance_of_b):
         self.attr1 = instance_of_b.attr1
	 self.attr2 = instance_of_b.attr2
         ....

Ciao
-----
FB



       


From marco at sferacarta.com  Tue May 13 08:13:35 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 14:13:35 +0200
Subject: Some comparison operators gone in Python 3.0?
In-Reply-To: <0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
	<0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
Message-ID: <RBfWj.41895$o06.41560@tornado.fastwebnet.it>

alex23 wrote:

> Given that all nine of his postings have inflammatory topics, he's
> beginning to sound like a troll.

Thank you, I couldn't decide if he was silly or nasty.
Now I know he's both.




From collinyeung at shaw.ca  Mon May 12 00:52:19 2008
From: collinyeung at shaw.ca (Collin)
Date: Mon, 12 May 2008 04:52:19 GMT
Subject: Accepting text input
Message-ID: <72QVj.262833$pM4.115744@pd7urf1no>

I'm pretty new to Python, but this has really bugged me. I can't find a 
way around it.


The problem is that, when I use raw_input("sajfasjdf") whatever, or 
input("dsjfadsjfa"), you can only have numerical values as answers.

Any help would be appreciated. Thanks.


From gagsl-py2 at yahoo.com.ar  Sat May 24 20:30:29 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 21:30:29 -0300
Subject: problem with import / namespace
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
	<483474E8.8090708@shopzeus.com>
	<b0d9688e0805240457r77716c56y94e9b71bf8de5ed9@mail.gmail.com>
Message-ID: <op.uboo03gkx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 08:57:37 -0300, ohad frand <ohad911 at gmail.com> escribi?:

> Thanks for your reply but it stil didnt work:
> i opened python shell, changed active directory to \\one and imported tmp1.
> now the correct file is loaded.
> now i deleted tmp1
> i dir os.chdir(\\two) and imported tmp1 again. now the incorrect file is
> loaded (the same one as before).
> i did one more trial with sys.path insted of os.chdir() and it didnt work
> either (sys.path.append(\\one), import tmp1, del tmp1, sys.path.remove(\\one),
> sys.path.append(\\two), import tmp1)
> can you please try to do so and see for yourself that something is wrong
> here.

If you want Python to forget about module tmp1: del sys.modules['tmp1']
But most of the issues with reload apply too http://docs.python.org/lib/built-in-funcs.html#l2h-61

> The reason why i am not using other names is because i am triyng to build
> something that will execute external sw and for that i have no control of
> the names of the modules, but this is not important, because python must
> give us a way to clear previously imported module

See http://docs.python.org/ref/import.html to see how the import statement works, and PEP 328 http://docs.python.org/whatsnew/pep-328.html to see how using relative imports can help in this case, but not without some help from the external modules themselves.
Anyway I don't understand your usage of execfile. Maybe you're after some form of plugin system? (search past messages with those keywords)

-- 
Gabriel Genellina



From aisaac at american.edu  Fri May  9 09:51:21 2008
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 09 May 2008 13:51:21 GMT
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <JqEUj.52492$Bb3.45491@trnddc01>
References: <JqEUj.52492$Bb3.45491@trnddc01>
Message-ID: <tFYUj.138$5Y1.88@trnddc04>

A question related to the observer pattern...

Suppose I have a variant: there are stocks, mutual funds, and investors.  Let us say that funds are observers for multiple stocks, and investors are observers for funds.  Once a "month" all stocks notify their observing funds of their end-of-month price, and *then* all fund to notify their observing investors of their end-of-month investment value. 

What is a good way to enforce this timing?  (I.e., a fund should not notify an its investors until all stocks have reported.)

Here is one way:

- for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
- as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
- When it is ok, the fund notifies investors and resets all the ``reportreceived`` values. 

Is this sensible enough? What are standard and better ways?

Thank you, 
Alan Isaac 

PS I am drawing on the description of the observer pattern at
<URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>
The real world aspects are just to add some concreteness.


From lists at cheimes.de  Fri May 16 07:50:38 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 16 May 2008 13:50:38 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
Message-ID: <482D750E.3030409@cheimes.de>

globalrev schrieb:
> cust1 = customer.__init__('12',['1','435','2332'])

cust1 = customer('12',['1','435','2332'])

Christian



From badmuthahubbard at gmail.com  Sun May  4 16:36:00 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sun, 4 May 2008 23:36:00 +0300
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <8200bab70805041336xf96f45ci2bed62ccb96ad61e@mail.gmail.com>

Threading was recommended to me as a way to time things:
http://docs.python.org/lib/timer-objects.html
Dunno if that helps you.
-Chuckk

On Sun, May 4, 2008 at 8:11 PM, Gilly <gilly.dekel at gmail.com> wrote:
> Hi
>  I am trying to create an application that uses some form of input to
>  create a midi file.
>  I would like for this to be a 'real time' process. In other words, I
>  want to be able to begin playing the midi file before I finish writing
>  it, and continue writing as it plays.
>
>  I would really appreciate any help possible on this matter.
>
>  Thanks!!
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From malaclypse2 at gmail.com  Sat May  3 22:25:32 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Sat, 3 May 2008 22:25:32 -0400
Subject: dict invert - learning question
In-Reply-To: <fvihum$em7$1@news.xmission.com>
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <16651e80805031925m7d393256y17711bb8b8c42765@mail.gmail.com>

On Sat, May 3, 2008 at 4:29 PM, dave <squareswallower at y1a2hoo3.com> wrote:
>  here is a piece of code I wrote to check the frequency of values and switch
> them around to keys in a new dictionary.  Just to measure how many times a
> certain key occurs:
>
>  def invert(d):
>         inv = {}
>         for key in d:
>                 val = d[key]
>                 if val not in inv:
>                         inv.setdefault(val, [key])
>                 else:
>                         inv[val].append(key)
>         return inv
>
>
>  Using the methods above (I'm just a beginner) could I have written it more
> concisely?  Any criticism/critique in the code would be greatly appreciated.

If you're using python 2.5, the collections module has the defaultdict
type that is useful for things like this.

from collections import defaultdict

def invert2(d):
    inv = defaultdict(list)
    for key, value in d.items():
        inv[value] += key
    return dict(inv)

If you don't mind returning a defaultdict instead of a regular
dictionary, you could just 'return inv'.  The defaultdict is useful
for building up the frequency counts in the first place too:

def wordcount(wordlist):
    wc = defaultdict(int)
    for word in wordlist:
        wc[word] += 1
    return dict(wc)


-- 
Jerry


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:42:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:42:35 -0300
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>
	<7e4721aa-4dac-466c-b884-6314ead136b6@q1g2000prf.googlegroups.com>
Message-ID: <op.uavgs9mdx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:30:32 -0300, skunkwerk <skunkwerk at gmail.com>  
escribi?:

> On May 8, 4:54 pm, castiro... at gmail.com wrote:
>> On May 8, 5:45 pm, skunkwerk <skunkw... at gmail.com> wrote:
>>
>>
>>
>> > i'm getting the wrong output for the 'title' attributes for this
>> > data.  the queue holds a data structure (item name, position, and list
>> > to store results in).  each thread takes in an item name and queries a
>> > database for various attributes.  from the debug statements the item
>> > names are being retrieved correctly, but the attributes returned are
>> > those of other items in the queue - not its own item.  however, the
>> > model variable is not a global variable... so i'm not sure what's
>> > wrong.
>>
>> > i've declared a bunch of workerthreads(100) and a queue into which
>> > new requests are inserted, like so:
>>
>> > class SimpleDBThread ( threading.Thread ):
>> >    def __init__ ( self, queue ):
>> >                 self.__queue = queue
>> >                 threading.Thread.__init__ ( self )
>> >    def run ( self ):
>> >                 while 1:
>> >                         item = self.__queue.get()
>> >                         if item!=None:
>> >                                 model = domain.get_item(item[0])
>> >                                 logger.debug('sdbthread  
>> item:'+item[0])
>> >                                 title = model['title']
>> >                                 scraped = model['scraped']
>> >                                 logger.debug("sdbthread title:"+title)
>>
>> > any suggestions?
>>
>> If man arises as a tool-carrier, we will carry tools, not people.
>> Don't use Python to make people; make money, and not too much.  Pick a
>> wage and you might get somewhere.
>
> excuse me?

(Please forgive our local pet)

is "item" a list? Perhaps the *same* list as other requests? Be careful  
when you put mutable objects in a queue.
And what about domain.get_item? is it a thread safe operation?
You said the model is not a global - but is it a *different* object for  
each request?

-- 
Gabriel Genellina



From google at mrabarnett.plus.com  Wed May 21 13:26:28 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 10:26:28 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
	<FJXYj.78134$%15.20121@bignews7.bellsouth.net>
	<KoYYj.52545$3v1.22082@bignews3.bellsouth.net>
Message-ID: <370cb52b-4c40-42be-941c-fc8c50305e85@26g2000hsk.googlegroups.com>

On May 21, 5:50 pm, "inhahe" <inh... at gmail.com> wrote:
> >> One thing I hate from C is the assignment in expressions...Forcing
> >> myself to write
> >> 0 == Something
> >> rather than
> >> Something == 0
>
> > interesting trick, i've never thought of that/seen it
> > although if Python implemented it I think it should default to giving
> > warnings when you use = in an expression, that way you don't have to
> > worry.
>
> That introduces complications though, do you want to see a pagefull of
> warnings every time you import a module that uses the ='s?
> You could specify in your python file that you want to suppress that
> warning, but then you'd never know when you used = by accident when you
> meant to use ==.
> anyway i was thinking you could have a second assignment operator to use
> just in expressions, and only allow that.  it could be := since some
> languages tend to use that. i wouldn't like it as a general assignment
> operator but assignment in expressions is a special case.   also <- or ->.
> C uses -> for functions but I think math/calculators use that for
> assignment.

My preference would be ?=.

if match ?= my_re1.match(line):
  # use match
elif match ?= my_re2.match(line):
  # use match
elif match ?= my_re3.match(line):
  # use match


From wizzardx at gmail.com  Sun May  4 08:49:24 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:49:24 +0200
Subject: Light slices + COW
In-Reply-To: <53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
	<53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
Message-ID: <18c1e6480805040549u35361934s938c054725dba905@mail.gmail.com>

>  > D compiles to efficient machine code so Python is at a disadvantage
>  > even if you use the same syntax (see my first example). You can make
>  > the Python version faster, but beware of premature optimization.
>
>  This time I don't agree with this "premature optimization" thing. My
>  original Python version is just 5 lines long, it's readable enough,
>  and it's a part of a large library of mine of similar functions, they
>  must be fast because I use them all the time as building blocks in
>  programs.
>

Have you looked into the 'numpy' libraries? Those have highly
optimized array/numeric processing functions. Also the have a concept
of getting 'views' when you slice, rather than a full copy.

I also suggest benchmarking your apps which use your libs and see
where the bottlenecks are. Then you can move those to external
compiled modules (c/pyrex/cython/shedskin/etc). You can keep your
slower Python version around as a reference implementation.

>  > What I'dlike to see is a rope[1] module for Python.
>
>  People have already suggested it, and there's even an implementation
>  to replace Python strings. It was refused because... I don't know why,
>  maybe its implementation was too much more complex than the current
>  one, and it wasn't faster in all situations (and I think Guido wants
>  data structures that try to replace the basic built-in ones to be
>  faster in all situations and user-transparent too).

I'd be happy if there was a separate 'rope' class that you could wrap
arbitrary long sequences in when you need to (the same way that STL
has it separate to the string class, even though the string class has
a lot of other optimizations (internal ref counts, etc, to avoid
unnecessary copies)). Do you know one?

David.


From arnodel at googlemail.com  Sun May 11 13:36:25 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 18:36:25 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <m2ej884uau.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>
> where fileName is defined before the line it's used in.  It works fine 
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get 
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>

It's telling you that you haven't got a file called 'fileName'.
Posting the code that triggers this error would allow people to
diagnose the error accurately rather than guessing.

-- 
Arnaud


From rlazo.paz at gmail.com  Sun May 25 14:02:47 2008
From: rlazo.paz at gmail.com (Rodrigo Lazo)
Date: Sun, 25 May 2008 13:02:47 -0500
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4839A607.7070300@behnel.de>
Message-ID: <8663t2feig.fsf@thinkpad.colorado>

Stefan Behnel <stefan_ml at behnel.de> writes:

> notnorwegian at yahoo.se wrote:
>> im writing a webcrawler.
>> after visiting a new site i want to store it in alphabetical order.
>> 
>> so obv i want fast insert. i want to delete duplicates too.
>> 
>> which datastructure is best for this?
>
> Keep the data redundantly in two data structures. Use collections.deque() to
> append and remove as in a queue, and set() to find duplicates.
>

what about heapq for sorting? 

-- 

Rodrigo Lazo (rlazo)



From tjreedy at udel.edu  Sun May 25 20:46:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 20:46:48 -0400
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
Message-ID: <g1d19m$amg$1@ger.gmane.org>


"I V" <ivlenin at gmail.com> wrote in message 
news:eci_j.4164$mh5.917 at nlpi067.nbdc.sbc.com...
| On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
| > I try to get a set of lambda functions that allows me executing each

I think it worth the reminder that Python has lambda *expressions* that 
result in function objects that identical to the function objects produced 
by def statements (except for the special name '<lambda>').   For the 
purpose of this thread,comparing functions by comparing their code objects, 
the name attribute is irrelevant.  So this discussion has nothing to do 
with the syntactic form of function definitions.

| > function code exactly once. Therefore, I would like to modify the set
| > function to compare the func_code properties (or the lambda functions 
to
| > use this property for comparison).
|
| With Ivan's approach, you lose access to the actual lambdas,

I presume you mean function object rather than lambda expression

| so you need
| to create a new function and then modify its code object to actually call
| the code; this seems a little clunky to me. You might instead want to
| wrap the lambdas in an object that will do the comparison you want:
|
| class Code(object):
| def __init__(self, func):
| self._func = func
|
| def __cmp__(self, other):
| return cmp(self._func.func_code, other._func.func_code)
|
| def __call__(self, *args, **kwargs):
| return self._func(*args, **kwargs)

If one could subclass from function instead of object, this would be even 
simpler (even with Bearophile's addition) since no __call__ would be 
needed.  But we cannot, partly because there did not seem to be much use 
case when this was once discussed.   But here is one ;-)

tjr





From nagle at animats.com  Sat May  3 12:38:48 2008
From: nagle at animats.com (John Nagle)
Date: Sat, 03 May 2008 09:38:48 -0700
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <mailman.465.1209746433.12834.python-list@python.org>
References: <mailman.465.1209746433.12834.python-list@python.org>
Message-ID: <481c9223$0$34540$742ec2ed@news.sonic.net>

python at bdurham.com wrote:
> Bad file names, i.e. filenames the OS considers illegal, will cause
> functions in the os.path module to raise an error.
> 
> Example:
> 
> import os.path
> print os.path.getsize( 'c:/pytest/*.py' )

    The issue, I think, is there's no function that checks
syntax of a path name without checking with the underlying OS
to see if the file exists.

    If, say, you're writing a GUI tool for setting up some configuration,
you'd want to do input validation on fields without actually
accessing the files.

				John Nagle


From rewonka at gmail.com  Thu May 29 12:37:54 2008
From: rewonka at gmail.com (rewonka at gmail.com)
Date: Thu, 29 May 2008 09:37:54 -0700 (PDT)
Subject: bit parsing from file
References: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>
	<a8f14114-f3e9-4848-8737-6736a46da122@r66g2000hsg.googlegroups.com>
Message-ID: <72784b91-df8d-424f-9531-d6c7cd9b073b@a70g2000hsh.googlegroups.com>

On m?j. 29, 18:26, Mensanator <mensana... at aol.com> wrote:
> On May 29, 9:42?am, "rewo... at gmail.com" <rewo... at gmail.com> wrote:
>
>
>
>
>
> > Hello,
>
> > I'm tring to make a cutting script.
> > The problem is the following, i have a sample pattern, for
> > example :'11101110' (0xEE)
> > That is the sign of the data begining.
> > How can i cut a file if the byte stepping is not the same, for
> > example:
>
> > file=open('test.bin','rb')
> > data=file.read()
> > print binascii.hexlify(data) ? ? ? ? ? ?# BB9A (1011101110011010)
> > file.close()
>
> > so i need to cut the first two bit and start to writeout the bit
> > stream to another file
> > If somebody have an idea to do this, please share with me.
> > Thanx
>
> Cutting off the leading two bits isn't a problem,
> but once you write out the byte 11101110 ?you are
> left with 011010 which cannot be written as it's not
> a byte. How do you plan to handle that? Add two bits
> at the MSB (00011010) or two bits at the LSB (01101000)
> or discard the fractional byte?
>
> And do you always know what the bit offset is or
> do you have to search for the 11101110 starting
> pattern?
>
Thank's for the reply,
Yes, I have to search for the pattern, the bit offset not always the
same.
for another thing, it's ok if i can fill up with zero at the LSB or
discard that byte. (the last byte not important)

Rew


From skanemupp at yahoo.se  Fri May 16 16:24:30 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 13:24:30 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>
Message-ID: <ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>

On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
> On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > i extract info from one file and put it into a dictionary.
> > i want to save that dictionary for later use, how do i do that?
> > might save a list of dictionaries or a list of classobjects too if
> > there is any difference.
>
> use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> ...
> Jay Graves


pickle.dumps(mg)
pickle.load(mg)

'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)


From deets at nospam.web.de  Tue May 20 10:36:20 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:36:20 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
Message-ID: <69g605F2v4102U2@mid.uni-berlin.de>

> That being said, I use that idiom myself.  But I don't see anything wrong
> with using a list-comp as loop-abbreviation. because that is it's actual
> purpose. And also it is common in non-functional languages that l-values
> aren't always assigned, if the aren't needed. It's the consequence of
> having side-effects in a language - and python has them.

After being corrected about missing the construction of a None-containing
list, one needs of course to think about the waste of resources, as a
possible result-list is created in any case.

I personally still don't mind that (if we talk about a few hundred objects a
top) - but it makes a strong point against a general usage.

Diez


From rossgk at gmail.com  Fri May 30 14:45:22 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 30 May 2008 11:45:22 -0700 (PDT)
Subject: PyDev multiple source files?
References: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>
Message-ID: <3fc76e19-c74d-4158-a9e3-9a595c26fee8@z72g2000hsb.googlegroups.com>

On May 30, 2:10 pm, RossGK <ros... at gmail.com> wrote:

> Now I want to be able to break my single source file up into multiple
> files to segregate functions, divide up with others, etc, but I don't
> know how to configure it.

Found a reference that helped me out:

http://www.python.org/doc/2.1.3/tut/node8.html

The keys for me are that a) a file named junk.py is called a module (I
thought a module was a set of files within a package - nope just a
source file).

Import is the right thing for an 'include' action - but after you
import you need to hierarchically reference the contents of the
imported module.   So if my junk.py 'module' contains a "def things",
then after I have done my "import junk"  I refer to things as
junk.things

Global seem to have a scope of only their current module. So the
question that comes to mind is how to create a global global.  Can I
stick it into __init_.py or something and have it available for the
whole package?


From castironpi at gmail.com  Thu May 15 19:16:18 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:16:18 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>
Message-ID: <0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>

On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > Why can't I write this?
> > > > --
>
> > > Because your antecedent is undefined?
>
> > Of the two ways to play, just to say #define this per se would be a
> > bad move, but that's one that comes from the wrong group. ?#define is
> > a big scary macro, that python hasn't been using; it's the one-line
> > typo. ?Instance:
>
> > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > Use it to render planes in solids.
>
> > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> Jesus H. Christ. This really sounds like my mother in law. Scary,
> definitively.- Hide quoted text -
>
> - Show quoted text -

Definitely.  But, due, I forgot to complete an example.

> > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )

in C.  Python:

life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
exec( life1 )

Where does it go?


From f.pollastri at inrim.it  Thu May 22 05:23:01 2008
From: f.pollastri at inrim.it (Fabrizio Pollastri)
Date: Thu, 22 May 2008 11:23:01 +0200
Subject: merging the global namespaces of two modules
Message-ID: <48353B75.6090809@inrim.it>

Hi,

just an import problem:
a program imports two modules, modA and modB, each module do not known anything 
about the other module (i.e. no cross imports in them), both modules needs to 
refer to some functions that are defined in the global namespace of the other 
module. There is a possible solution? In other words, can the importing program 
cover in some way the lack of cross imports between the modules?
Thank in advance for any help.

F. Pollastri


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 10:10:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 16:10:33 +0200
Subject: Web Framework suggestions for a RIA type application for managing
	lab  specimens
In-Reply-To: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
References: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
Message-ID: <48245b58$0$11994$426a74cc@news.free.fr>

rynt a ?crit :
> Hello all.
> 
> I'm Looking for suggestions for which Python web framework(e.g.
> Django, Turbogears,etc.) would work best to develop a cross platform
> browser based system to manage lab specimens.
> 
> Requirements are:
> a. highly secure
> b. run on internet or intranet
> e. RDBMS read/write intensive
> d. be able to work on-line or off-line (with automatic updates to db
> when coming back on-line)

can't be handled by a web framework alone - you'll need client-side support.

> e. be able to print reports and labels using a variety of
> printers(laser, deskjet, label printers)

it's mostly a client-side problem.

> f. have a rich set of desktop-like components

A web app is restricted to what's available in HTML (possibly using 
Javascript).

> Perhaps a web based app isn't the way to go.  

Looks like you want a "rich" (desktop) GUI client. Note that (given 
proper design and architecture) you can have a same server-side backend 
for both, but that means quite a lot of code.



From mnikhil at gmail.com  Tue May 20 14:19:17 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:49:17 +0530
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
Message-ID: <g0v4n8$4dk$1@registered.motzarella.org>

Nikhil wrote:
> Hi,
> 
> I am using python -i, and I find it hard typing/pasting the commands 
> from the previous interactive shell. Basically, is there anyway that I 
> can preserve the history in the shell?
> I guess but not sure there should be something like ~/.pyrc for 
> configuring such but can someone please let me know what is the 
> effective environment variable to preserve the history?
> 
> Thanks,
> Nikhil
I figured it out. This below thing works fine for me.
BTW, I got it from http://docs.python.org/tut/node15.html. A little 
search would not hurt ;-)


$ echo $PYTHONSTARTUP
/u/me/.pyrc
$ cat .pyrc
import sys
import atexit
import os
import readline
import rlcompleter

myprompt='$ '
myhistoryfile="/u/me/.pyhistory"

#set the prompt
sys.ps1=myprompt

#save the history
historyPath = os.path.expanduser(myhistoryfile)

def save_history(historyPath=historyPath):
     import readline
     readline.write_history_file(historyPath)

if os.path.exists(historyPath):
     readline.read_history_file(historyPath)

atexit.register(save_history)
del os, atexit, readline, rlcompleter, save_history, historyPath


From castironpi at gmail.com  Fri May 16 09:02:03 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:02:03 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com> 
	<482c4934$0$6041$426a74cc@news.free.fr>
	<60e2ee6e-955a-49f2-a87a-ad8c3908d2c8@l42g2000hsc.googlegroups.com>
Message-ID: <4df6f806-5ccc-4837-a632-699b7c986645@y38g2000hsy.googlegroups.com>

On May 16, 3:22?am, martindesali... at gmail.com wrote:
> look at module re (rgular expression) or pyparser
>
> seehttp://nedbatchelder.com/text/python-parsers.html

This ties in to 'call tree tool?' from yesterday.  Do we have any
visualization modules?  My two examples were 're' and 'call trees'


From bignose+hates-spam at benfinney.id.au  Thu May  1 23:25:55 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 13:25:55 +1000
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
Message-ID: <8763tx1j5o.fsf@benfinney.id.au>

Brendan Miller <catphive at catphive.net> writes:

> Is there an actual portable means of asynchronously spawning a
> process and getting a handle to it, being able to write stdin and
> read stdout, or does everyone just write their own wrapper for fork
> and spawn?

You're looking for the 'subprocess' module in the standard library
<URL:http://docs.python.org/lib/module-subprocess.html>.

-- 
 \     "If you can't annoy somebody there is little point in writing." |
  `\                                                  -- Kingsley Amis |
_o__)                                                                  |
Ben Finney


From mal at egenix.com  Fri May 30 16:37:14 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 30 May 2008 22:37:14 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <g1p781$2j1$00$1@news.t-online.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<g1p781$2j1$00$1@news.t-online.com>
Message-ID: <4840657A.2000904@egenix.com>

On 2008-05-30 17:41, Peter Otten wrote:
> Josep wrote:
> 
>> I'm playing with an application framework (or kinda) that's developed
>> with python, and it throws this error:
>>
>>
>>> File
>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>>> line 281, in execute
>>>     sql = unicode(sql, self.Encoding)
>>> LookupError: unknown encoding: utf_8_euro
>> At the application (DABO) mailing list, they have pointed that this has
>> to be a Python issue. As I'm a totally python newbie, I would ask if
>> somebody has experimented this kind of error, and if there is any known
>> solution. I've found no clue searching at Google right now.
>>
>> My Python version is 2.5.2, Ubuntu Hardy .deb package.
> 
> Python might get confused by an @EURO suffix in the locale:

Right, that's what's happening.

The locale module uses a locale aliasing table that help map environment
locale settings to C local names.

That table was last updated in 2004 and since then a lot more
locale variable strings have made their way into the Linux
distros.

I guess we need to update the table...

> $ LANG=de_DE.UTF-8 at EURO
> $ python -c"import locale; print locale.getdefaultlocale()"
> ('de_DE', 'utf_8_euro')
> 
> Try setting the LANG environment variable to something like
> 
> $ LANG=de_DE.UTF-8
> $ python -c"import locale; print locale.getdefaultlocale()"
> ('de_DE', 'UTF8')
> 
> before you run your program (use ca_ES or whatever you need instead of
> de_DE).
> 
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 30 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From tjreedy at udel.edu  Mon May 12 18:43:49 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 18:43:49 -0400
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
	<c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>
Message-ID: <g0ah73$hod$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...

here is a very sophisticated implementation :)

>>> def extract(indices, seq):
...     return tuple(seq[i] for i in indices)
...
>>> y, d = extract((0, 2), time.localtime())
>>> y, d
(2008, 12)

===================
Or a generator version:

# 3.0
def extract(iterable, indexes):
    # assume indexes are all legal
    enext = enumerate(iterable).__next__
    i,item = enext()
    for index in indexes:
        while i < index:
            i,item = enext()
        yield item

import time
print(list(extract(time.localtime(), (0,2))))

#prints [2008, 12] 





From onsen-neko at gmx.net  Thu May  8 03:22:57 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Thu, 8 May 2008 09:22:57 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.716.1210187999.12834.python-list@python.org>
	<40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
Message-ID: <200805080922.58139.onsen-neko@gmx.net>

Am Donnerstag 08 Mai 2008 00:12:26 schrieb 
bruno.desthuilliers at gmail.com:

> very often sees do-nothing catch-all try/catch blocks in Java - which
> is way worse than just letting the exception propagate. I find all
> this totally pointless, because there's just no way for a compiler to
> check if your code is logically correct.

But it's enough if the called method exists and returns the correct 
type. At least it prevents a crash.

> > Interfaces work at
> > compile-time, while method-stubs raise at their first call, so in
> > worst case, never.
> And then ? If it's never called, why bother implementing it ?

You never can't say when it's called at least, that's the point. 

> > That's the point. Interfaces garantee that a duck is a duck, an not
> > only a chicken that quack.
> Who cares if it's a chicken as long as it quacks when you ask her to
> ? Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)

Ducks can also swim and fly. And if you need a really duck, but have 
onyl a chicken while the coder was to bored to make one...

Of course, in the practical world that all doesn't  matter. But in the 
theoretical world of the big coding farms, called business, that's one 
cornerstone of success, in the tinking of managers and so.


From stefan_ml at behnel.de  Sat May 10 01:43:58 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 10 May 2008 07:43:58 +0200
Subject: PyXml
In-Reply-To: <mailman.892.1210376249.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
	<mailman.892.1210376249.12834.python-list@python.org>
Message-ID: <4825361E.8000102@behnel.de>

Martin v. L?wis wrote:
>> Can anyone recommend a Python validating parser that validates vs Xml
>> Schema?
> 
> The libxml bindings for Python can do that.

... although the OP will likely prefer using lxml, where it's three lines of
Python (ok, plus an import), compared to quite a bit of code in the official
libxml2 bindings.

http://codespeak.net/lxml

Stefan


From lucaspm at dcc.ufba.br  Fri May  9 09:25:21 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Fri, 9 May 2008 10:25:21 -0300
Subject: "prove"
In-Reply-To: <48240c00$0$7184$426a74cc@news.free.fr>
References: <mailman.770.1210254618.12834.python-list@python.org>
	<48240c00$0$7184$426a74cc@news.free.fr>
Message-ID: <9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>

On Fri, May 9, 2008 at 5:32 AM, Bruno Desthuilliers
<bruno.42.desthuilliers at websiteburo.invalid> wrote:
> Why do you need the documentation ? Just fire up your python shell and hack
> a Q&D example:
I agree. I said it to this person, but he insisted I should use documentation...


From castironpi at gmail.com  Wed May 14 14:20:59 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:20:59 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com> 
	<8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com> 
	<5cedfda6-a64a-456a-ab90-ed33229036a2@b64g2000hsa.googlegroups.com>
Message-ID: <2565a3a8-232d-4bac-b8ce-2e202b2f3f93@d77g2000hsb.googlegroups.com>

On May 14, 1:16?pm, castiro... at gmail.com wrote:
> On May 14, 1:09?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:07?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > > > How does it generate text?
>
> > > > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > > > place to start the ring.
>
> > > > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > > > some cubic verticals.
>
> > > > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > > > can pretty well win work.- Hide quoted text -
>
> > > > > > - Show quoted text -
>
> > > > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > > > - Show quoted text -
>
> > > > If Python can plot in to chess, and Tron rings live, then why not
> > > > group it knew?- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > That would be know. ?Plot and split in too.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Now can I catch function-type objects from a throw? ?I'm crossing all
> > of those.- Hide quoted text -
>
> > - Show quoted text -
>
> I have destin and fate and die, growth sustanance and decay. ?Now cars
> are important, but not logically still. ?I am certain I play, so;
> where's the ring?- Hide quoted text -
>
> - Show quoted text -

It's just an 8x8 cross, but I'm just; have isn't in me.


From jcd at unc.edu  Mon May  5 11:11:35 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Mon, 05 May 2008 11:11:35 -0400
Subject: pygame music, cant read mp3?
In-Reply-To: <a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
Message-ID: <1210000295.24836.11.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 07:32 -0700, globalrev wrote:
> On 5 Maj, 16:29, globalrev <skanem... at yahoo.se> wrote:
> > On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
> >
> >
> >
> > > On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> > > wrote:
> >
> > > > 2008/5/5, globalrev <skanem... at yahoo.se>:
> >
> > > > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
> >
> > > > Are you sure that:
> >
> > > > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
> >
> > > > Check it with python.
> >
> > > > --
> > > > Regards,
> > > > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> > > >>> import os
> > > >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
> >
> > > False
> >
> > > but...it is there....
> >
> > > >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
> >
> > > False
> >
> > > does it matter if i use / or \? which si recommended?
> >
> > i can find .png image in the same folder and when i just change
> > filename from snake.png to example1.mp3 it is false.
> >
> > i renamed the file once, could that have anything to do with it?
> 
> \\ or \ or / all works.
> 
> 
> the title of the mp3 is a long number still. i mena if i go to
> properties the name is example1.mpg but the title if i go to details
> is stillt he old one.
> 

Now I'm confused.  What is the name of the *file* on the filesystem?
You can verify this using

>>> os.listdir('C:/Python25/myPrograms/pygameProgs')

As for the question of \\ vs. \ vs. /:  Windows will accept forward
slashes, but you may run into trouble later on down the line if windows
treats one of your forward slashes as a command line option.  The native
format is to use backslashes as separators, but backslashes need to be
escaped in python's regular string literals, because of escape
sequences.  Single backslashes seem to be working for you, but that's
only because you've been lucky in not having escape characters following
your backslash.  Particularly, x, n, t, u, and U will cause trouble.
Probably others.

Cut'n'paste example:

$ python
Python 2.4.3 (#1, Dec 11 2006, 11:38:52) 
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> '\efoo'
'\\efoo'
>>> '\dfoo'
'\\dfoo'
>>> '\ufoo'
'\\ufoo'
>>> '\uabcd'
'\\uabcd'
>>> u'\uabcd'
u'\uabcd'
>>> u'\ufoo'
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position
0-4: end of string in escape sequence
>>> '\xfoo'
ValueError: invalid \x escape
>>> '\nfoo'
'\nfoo'
>>> print '\nfoo'

foo
>>>

Notice that the \ gets doubled (escaped) automatically by python in many
of the instances, but not for the \n, and an exception gets raised for
\u (in unicode strings only), and for \x (in regular strings too).  It's
safer just to escape your strings yourself.  So 'C:\\foo' is always
better than 'C:\foo', even though the latter may sometimes work.  Better
still is to create a list of directories, and use os.path.join(dirlist)
as follows:

directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
os.path.join(directory)

Then python can worry about the gritty details, and you don't have to.

-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From mikael at isy.liu.se  Tue May 13 03:15:19 2008
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 13 May 2008 09:15:19 +0200
Subject: passing *args "recursively"
In-Reply-To: <g0b2ot$mls$1@news.lysator.liu.se>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
	<g0b2ot$mls$1@news.lysator.liu.se>
Message-ID: <g0b2te$mls$2@news.lysator.liu.se>

Guillermo wrote:
>> This must be very basic, but how'd you pass the same *args several
>> levels deep?
>>
>> def func2(*args)
>>     print args # ((1, 2, 3),)
>>     # i want this to output (1, 2, 3) as func1!
>>     # there must be some better way than args[0]?
>>
>> def func1(*args):
>>     print args # (1, 2, 3)
>>     func2(args)
>>
>> func1(1,2,3)

Me, myself and I wrote:
> func2(*args)
> 
> Thats all. See 
> http://docs.python.org/tut/node6.html#SECTION006740000000000000000

That was a bit unclear. You should use func2(*args) when you call the 
function.

/MiO


From nick at craig-wood.com  Fri May 23 05:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:09 -0500
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
Message-ID: <slrng3d34k.3re.nick@irishsea.home.craig-wood.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
> > Can someone suggest an efficient way of calling method whose name is
> > passed in a variable?
> > 
> 
>  method = getattr(obj, 'method_name', None)
>  if callable(method):
>       method(args)

I think that that is needless LBYL...

   getattr(obj, 'method_name')(args)

Will produce some perfectly good exceptions

    >>> class A(object):
    ...     def __init__(self):
    ...             self.x = 2
    ...     def f(self, x):
    ...             print x == self.x
    ...
    >>> obj = A()
    >>> getattr(obj, 'floop')(1)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    AttributeError: 'A' object has no attribute 'floop'
    >>> getattr(obj, 'x')(1)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: 'int' object is not callable
    >>> getattr(obj, 'f')(1)
    False
    >>>

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kiskeke at gmail.com  Fri May  9 06:15:16 2008
From: kiskeke at gmail.com (kiskeke at gmail.com)
Date: Fri, 9 May 2008 03:15:16 -0700 (PDT)
Subject: here is the coolest site in the world, what I've talked about last 
	time: http://tinyurl.com/4e4smx
Message-ID: <21372592-fab9-4ec7-8e53-cb7ef1a92390@25g2000hsx.googlegroups.com>

here is the coolest site in the world, what I've talked about last
time: http://tinyurl.com/4e4smx


From usenet at solar-empire.de  Wed May 21 15:22:22 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Wed, 21 May 2008 21:22:22 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <ec9eg5-7lm.ln1@pluto.solar-empire.de>

Mark Dickinson <dickinsm at gmail.com> wrote:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
> 
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> a = 1e16-2.
>>>> a
> 9999999999999998.0
>>>> a+0.999     # gives expected result
> 9999999999999998.0
>>>> a+0.9999   # doesn't round correctly.
> 10000000000000000.0
> 
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?

On my system, it works:

 Python 2.5.2 (r252:60911, May 21 2008, 18:49:26) 
 [GCC 4.1.2 (Gentoo 4.1.2 p1.0.2)] on linux2
 Type "help", "copyright", "credits" or "license" for more information.
 >>> a = 1e16 - 2.; a
 9999999999999998.0
 >>> a + 0.9999
 9999999999999998.0

Marc


From grante at visi.com  Sun May 11 11:02:07 2008
From: grante at visi.com (Grant Edwards)
Date: Sun, 11 May 2008 10:02:07 -0500
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<mailman.939.1210505979.12834.python-list@python.org>
Message-ID: <Ms2dncFBEtLyl7rVnZ2dnUVZ_vzinZ2d@posted.visi>

On 2008-05-11, Max M <maxm at mxm.dk> wrote:
> wxPythoner at gmail.com skrev:
>
>> I have two another interesting things to discuss about, for
>> which I'll open new posts on this group. Look for "Python
>> doesn't recognize quote types" and "Python, are you ill?".
>
> You have a tendency to form your questions as complaints about
> Python being broken.
>
> You will probably get better responses if you just state that
> there are things you do not understand, and ask why it works
> that way.

The OP has already been banned from the wxWidgets IRC and the
wxPython mailing list.  His MO is to post a never ending stream
of whining, flame-bait, and demands that wxWidgets, wxPython,
(or whatever) be changed to suit his tastes regardless of the
justification for the current design and the amount of breakage
it would cause. wxPythoner (AKA "Chester) also seemed fond of
constantly giving wrong/misleading answers when other
inexperienced users asked technical questions.

He especially liked to post messages with subjects like "To
Rogin Dunn" and "To wxPython Developers" mailing list
instructing them to change various things in wxWidgets,
wxPython, and Python.  He consistently ignored pointers to
documentation and explanations of why things were done the way
they were.  

On top of all that, his fowl language and insulting attitude
finally got him banned:

http://article.gmane.org/gmane.comp.python.wxpython/58645
http://article.gmane.org/gmane.comp.python.wxpython/58695

So it's best to probably just ignore him...

-- 
Grant Edwards                   grante             Yow!  LBJ, LBJ, how many
                                  at               JOKES did you tell today??!
                               visi.com            


From upton at virginia.edu  Wed May 21 15:29:33 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 15:29:33 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
	<7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805211229teec955dhe7beccc59aede9ce@mail.gmail.com>

On Wed, May 21, 2008 at 12:11 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 10:00 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>> Sounds to me like the teacher is being difficult, ...
>
> No, proof-by-contradiction is a common technique in math.  If you can
> show that x=8 and x=10, then you have shown that your assumptions were
> incorrect.

Yes, I'm aware of proof by contradiction.  However, I think there's a
flaw in your use of this to justify your case--proof by contradiction
would essentially be showing x=8 and x=10 simultaneously, whereas the
sequence of instructions

x=8
x=10

imply a time relation, and there's no contradiction that x equals
something at one point in time, and something else at another point in
time.  (For any kid who is capable of understanding variables anyway,
just tell them something to the effect of "Plot the line y=x.  Okay,
now let 'y' be time.  At no point in time does x take on two values,
but it may take on different values at different points in time.  Same
concept.")

>
>> If you can't do, or don't like, math, you probably shouldn't be
>> programming.
>
> Why not?  Recipes are programs.  I prefer to look at it the other way:
> an easy-to-use programming language might encourage more people to
> like math.

To continue your analogy, if a recipe is the program, a person is the
computer.  Following a recipe is (relatively) easy, making up a new
recipe is relatively difficult unless you understand, or are at least
willing to tinker with, things like interactions between ingredients
and flavors.  Likewise, it's tedious and time-consuming but not
necessarily difficult to follow a program (assuming you understand the
rules of the language; I suppose here you could make some argument
"it'd be easier to read it in English"), but you need to understand
more about symbolic reasoning and such to be able to do much in the
way of programming.

All the same, I suppose you might have a point there, if you can show
somebody something cool while sneaking in the math and programming
such that they learn without even realizing it--somewhat akin to the
guy who a month or so ago wanted to sneakily teach his high school
class programming fundamentals by teaching them game programming.

>> You keep trotting out this quadratic equation example, but does FT
>> actually have any kind of useful equation solver in it?
>
> Not yet, but it will.  Probably around July.

Maybe this should be your selling point, and maybe you should be
drawing comparisons to programming in Matlab or Mathematica.


From daveparker at flamingthunder.com  Mon May 12 20:59:27 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:59:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
Message-ID: <eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>

On May 12, 6:32?pm, castiro... at gmail.com wrote:
> Can you render some furniture for me... to try to see some human
> posture to lowest energy levels.

I couldn't find any furniture created using DPGraph, but the math art
gallery at http://www.dpgraph.com/math-art.html has a sailboat, an
F15, Tux (the Linux penguin), a lampshade, and lots of other things
that will soon be doable in Flaming Thunder.


From johnjsal at NOSPAMgmail.com  Tue May 20 13:26:38 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:26:38 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <027e0cd4$0$26948$c3e8da3@news.astraweb.com>

"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9AA470833CCA8duncanbooth at 127.0.0.1...

> That is true when run interactively, but the behaviour changes again if 
> you
> run it as a script:

Yeah, I forgot to mention that you shouldn't rely on this behavior. :) 




From spectrumdt at gmail.com  Fri May  9 11:22:49 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 08:22:49 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
	<68aqoeF2rue80U1@mid.uni-berlin.de>
Message-ID: <9a66d295-2d05-455b-a825-dd0c75292917@e39g2000hsf.googlegroups.com>

Thanks for the reply.

I've found and installed the package containing pvm3.h. (The file is
now located under "share/pvm3/include/pvm3.h".) But Pypvm can't find
it.

Someone recommended that I install the equivalent of what is called
"build-essential" in Ubuntu. I was told that the equivalent can be
achieved in Fedora like this:

sudo yum groupinstall "Development Tools" --exclude=systemtap --
exclude=systemtap-runtime

I don't quite understand what these packages are supposed to do, but
they don't seem to help.

Can anyone tell me how to make (the installation program for) Pypvm
understand where the header file is?

Thanks in advance.


From grante at visi.com  Sun May 18 00:46:34 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 17 May 2008 23:46:34 -0500
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <dvSdnTorEJA3KbLVnZ2dnUVZ_u2dnZ2d@posted.visi>

On 2008-05-13, Rajarshi <rajarshi.guha at gmail.com> wrote:

> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?

Have you heard of a company called Google?  They use Python a
lot.

Another company you may have heard of is IBM. I have a laptop
made by them.  It came with Python pre-installed because a
bunch of the system utilities are written in Python.  I think
I've heard that HP and Compaq do the same (I can't verify it
personally).

If you've heard of Linux, there's a company called RedHat that
wrote their system installer and packaging/system-admin stuff
in Python.

-- 
Grant



From tjreedy at udel.edu  Tue May 13 17:32:04 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:32:04 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com><2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de><dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com><2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <g0d1ch$mb5$1@ger.gmane.org>


"Dave Parker" <daveparker at flamingthunder.com> wrote in message 
news:f6625824-b556-41c2-986e-4b1f32df5434 at n1g2000prb.googlegroups.com...
|> 5-10 times faster for what kind of code?

| Mostly numerical analysis and CGI scripting.

For numerical analysis, a fair comparison is Python with NumPy installed 
(or the older versions thereof). 





From stefan_ml at behnel.de  Sun May 25 15:33:10 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 25 May 2008 21:33:10 +0200
Subject: UTF problem?
In-Reply-To: <slrng3jf96.hio.sarenius@sun3.oulu.fi>
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
Message-ID: <4839BEF6.3060209@behnel.de>

Vesa-Matti Sarenius wrote:
> This did not work. Neither did commenting all print lines. The problem is
> somewhere else.

As Tim said, the line number that the exception prints would help here.

Stefan


From szhorvat at gmail.com  Mon May  5 10:08:02 2008
From: szhorvat at gmail.com (Szabolcs)
Date: Mon, 5 May 2008 07:08:02 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1> 
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no> 
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com> 
	<Xns9A9573FC740FBduncanbooth@127.0.0.1>
Message-ID: <bce1b718-ad05-4ecf-9bb1-d2925bc57214@2g2000hsn.googlegroups.com>

On May 5, 12:24?pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Szabolcs <szhor... at gmail.com> wrote:
> > On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> >> Gabriel Genellina wrote:
>
> >> > Python doesn't require __add__ to be associative, so this should
> >> > not be
> > used as a general sum replacement.
>
> >> It does not _require_ this, but using an __add__ that is not
> >> commutative and associative, or has side effects, would qualify as a
> >> serious misuse, anyway.
>
> > Sorry, I meant associative only, not commutative.
>
> Unfortunately an __add__ which is not associative is actually perfectly
> reasonable.

Well, 'reasonable' is a subjective notion in this case :-)  I have
never seen a non-associative use of the plus sign in maths, so I would
tend to take associativity for granted when seeing a + b + c in code,
therefore I would avoid such uses.  (Multiplication signs are a
different story.)  Of course others may feel differently about this,
and technically there's nothing in the way of using a non-associative
__add__! :)

> For example you could have a Tree class where adding two trees
> returns a new tree so (a+b)+c gives you:
>
> ? ? .
> ? ?/ \
> ? ?. ?c
> ? / \
> ? a ?b
>
> but a+(b+c) gives:
>
> ? ? .
> ? ?/ \
> ? ?a ?.
> ? ? ?/ \
> ? ? ?b ?c



From workitharder at gmail.com  Fri May 23 02:21:50 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 23:21:50 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<4moZj.13958$hv2.3334@bignews5.bellsouth.net>
Message-ID: <e065ef4c-45ce-475f-b72a-01ec54defb67@z24g2000prf.googlegroups.com>

On May 22, 5:39?pm, "inhahe" <inh... at gmail.com> wrote:
> >> 1
> >> 2
>
> actually, you don't want it to print 3 also? ?if not, then you would do
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args[:1])
>
> > import inspect
> > f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>
>

No, that was a typo. Thanks tho.


From zerge69 at gmail.com  Wed May 21 07:53:54 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Wed, 21 May 2008 04:53:54 -0700 (PDT)
Subject: How to transfer files over serial?
References: <dc9268f1-061e-48a8-8598-420f35fc858a@u12g2000prd.googlegroups.com>
Message-ID: <3e728bac-681c-48f1-9dde-3ec84d9e07b5@y18g2000pre.googlegroups.com>

On May 21, 4:07 am, RaymondHe <hrp... at gmail.com> wrote:
> I want to transfer files over serial,but PySerial Module does not
> support any protocol such as xmodem/ymodem,and I find nothing about
> these protocol write in python
>
> What should I do?Thank you

Does it have to be over the serial? If not, and what you really want
to do is transfer information between machines, you may want to take a
look at the socket library.


From eckhardt at satorlaser.com  Thu May 29 11:49:53 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Thu, 29 May 2008 17:49:53 +0200
Subject: boost
References: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>
Message-ID: <1uv2h5-dii.ln1@satorlaser.homedns.org>

deepest1 wrote:
> bjam --build-dir="D:\Program Files\boost_1_35_0" --toolset=gcc stage
> 
> I got 12 failures and 8 warnings from this (other few hundrds were ok)

Hmm, I remember trying to use Boost 1.35 with Python 2.5 on my Debian system
and also having problems, are you sure that at least the Python helper libs
are correctly compiled?

> E:\Source>g++ World.cpp
> World.cpp:1:28: boost/python.hpp: No such file or directory

Try -I "D:\Program Files\boost_1_35_0" as additional argument. Further, you
will need to tell g++ to link with the according boost library
(-lboost_python or something like that) and where it can find that lib
(-L"D:\Program Files\boost_1_35_0\stage").

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From google at mrabarnett.plus.com  Mon May 12 12:47:03 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Mon, 12 May 2008 09:47:03 -0700 (PDT)
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
	<Xns9A9B83DE83757duncanbooth@127.0.0.1>
	<SeWdnTid7Z7GwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com> 
	<Xns9A9C5539CF188duncanbooth@127.0.0.1>
Message-ID: <ea11fc49-ad80-4707-b178-ba84f254385d@w7g2000hsa.googlegroups.com>

On May 12, 8:31 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> >      The sloppy use of "single quote" for the "apostrophe" is unfortunate
> ><G>
>
> True, but that problem is outside of the Python community's control. Given
> that people do often refer to single quote when they mean apostrophe the
> error message should be written so as to minimise confusion.

FYI, there are actually 2 types of quote character, single and double,
each with 2 forms, left and right. In Unicode the single-quote
characters are U+2018 (?) and U+2019 (?) and the double-quote
characters are U+201C (?) and U+201D (?). The right-hand single-quote
is also the apostrophe.

In order to reduce the size of the character set needed, computer
manufacturers introduced 'sexless' quote characters, the single-quote/
aphostrophe U+0027 (') and double-quote U+0022 (").


From jstucklex at attglobal.net  Fri May 23 07:41:59 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Fri, 23 May 2008 07:41:59 -0400
Subject: php vs python
In-Reply-To: <UTrZj.2635$772.1119@bignews2.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
	<UTrZj.2635$772.1119@bignews2.bellsouth.net>
Message-ID: <WvSdna8685IJMKvVnZ2dnUVZ_o2dnZ2d@comcast.com>

inhahe wrote:
>> PHP can do that.  There are also a number of templating engines
>> available.  The nice thing about PHP is you have a choice.
> 
> i just meant that php is sort of invented to combine html and code, so if 
> you use python instead you should use a templating engine.  but i suppose 
> it's useful for php too.
> 
> 

Not at all.  With PHP, it's possible to do so, but not required.  With 
Python, OTOH, you pretty much have to use a templating engine.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From aaron.hildebrandt at gmail.com  Wed May 28 16:39:02 2008
From: aaron.hildebrandt at gmail.com (Aaron Scott)
Date: Wed, 28 May 2008 13:39:02 -0700 (PDT)
Subject: Writing a function from within Python
Message-ID: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>

Is it possible to change the content of a function after the function
has been created? For instance, say I make a class:

	class MyClass:
		def ClassFunction(self):
			return 1

And I create an object:

	MyObject = MyClass()

Is there any way to change the content of the function, a la pseudo-
code:

	MyObject.ClassFunction = "return 2"

Thanks for any insight you might be able to offer.


From gherron at islandtraining.com  Sat May 17 20:18:39 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 17:18:39 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>	<482E21F4.1090809@islandtraining.com>	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>	<482F0090.4030003@islandtraining.com>
	<BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
Message-ID: <482F75DF.1020700@islandtraining.com>

Marlin Rowley wrote:
> Actually in my traversal of the never-ending maze of understanding 
> arrays in python, I stumbled that the data in the wrong sequence.
>
> Let's get back to this transpose() deal, say we have these values as 
> integers (representing rgba again):
>
> [[[0,1,2,3]
> [4,5,6,7]
> [8,9,10,11]
> [12,13,14,15]]
>
> [[16,17,18,19]
> [20,21,22,23]
> [24,25,26,27]
> [28,29,30,31]]]
>
> Now if I do this: transpose((2,0,1)), I get this:
>
> [[[0,4,8,12] [16,20,24,28]]
> [[1,5,9,13] [17,21,25,29]]
> [[2,6,10,14][18,22,26,30]]
> [[3,7,11,15][19,23,27,31]]]
>
> This is NOT what I want. I want the new array to be:
>
> [0,4,8,12][1,5,9,13]
> [2,6,10,14][3,7,11,15]
> [16,20,24,28][17,21,25,29]
> [18,22,26,30][19,23,27,31]
>
> How do I do this?

That's s little ambiguous, but one of the following two 
transpose-reshape-print's might be what you want.

Gary Herron


import numpy

a = numpy.array([[[0,1,2,3],
[4,5,6,7],
[8,9,10,11],
[12,13,14,15]],

[[16,17,18,19],
[20,21,22,23],
[24,25,26,27],
[28,29,30,31]]])


print numpy.reshape(a.transpose(0,2,1), (8,4))
print numpy.reshape(a.transpose(0,2,1), (4,2,4))

output is:

[[ 0 4 8 12]
[ 1 5 9 13]
[ 2 6 10 14]
[ 3 7 11 15]
[16 20 24 28]
[17 21 25 29]
[18 22 26 30]
[19 23 27 31]]

and

[[[ 0 4 8 12]
[ 1 5 9 13]]

[[ 2 6 10 14]
[ 3 7 11 15]]

[[16 20 24 28]
[17 21 25 29]]

[[18 22 26 30]
[19 23 27 31]]]



>
> -M
>
>
>
>
>
> ------------------------------------------------------------------------
>
> > Date: Sat, 17 May 2008 08:58:08 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com
> > CC: python-list at python.org
> > Subject: Re: numpy.frombuffer != unpack() ??
> >
> > Marlin Rowley wrote:
> > >
> > > Very cool.
> > >
> > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > a represents a tile with height of 2 and width of 4 with 4 bits/pixel
> > > for each color.
> > >
> > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
> > > this seperates the stream into individual values - Check
> > >
> > > > >>> b.shape=(2,4,4)
> > >
> > > This reshapes the array so that b.shape=(height,width,#bits/pixel) 
> - Check
> > >
> > > >>> c = b.transpose((2,0,1))
> > >
> > > What does the (2,0,1) represent in terms of width and height and
> > > number of bytes?
> >
> > The (2,0,1) tells how to exchange the axes. For instance in a 2D array,
> > a normal transpose exchanges rows and columns. It will change a (a by
> > b) sized array into a (b by a) sized array. This would be equivalent to
> > the more saying interchange axes 0,1 to the new order of 1,0.
> >
> > In numpy with higher dimension arrays, the default transpose just
> > exchanges the first two axes, and the full transpose allows you to
> > specify exactly the new ordering of the exes.
> >
> > So transpose((2,0,1)) means take axes (0,1,2) to the new order
> > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being
> > of size (c by a by b) in size.
> >
> > In terms of implementation, there may not be *any* data re-arrangement
> > in a transpose. The only thing that needs changing is how the indices
> > are converted to an actual machine address of an indexed item. The
> > documentation notes this by saying transpose returns a "new view" of 
> the
> > array. This explains why I copied the array before extracting bytes
> > out of it -- you really do need the elements in the new order for the
> > next operation.
> >
> > Gary Herron
> >
> > >
> > >
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > > Date: Fri, 16 May 2008 17:08:20 -0700
> > > > From: gherron at islandtraining.com
> > > > To: marlin_rowley at hotmail.com; python-list at python.org
> > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > >
> > > > Marlin Rowley wrote:
> > > > > All:
> > > > >
> > > > > Say I have an array:
> > > > >
> > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > > >
> > > > > How do I make it so that I now have:
> > > > >
> > > > > starting with first element (a[0])
> > > > > new_arr[0] = 'r'
> > > > > new_arr[1] = 'g'
> > > > > new_arr[2] = 'b'
> > > > > new_arr[3] = 'a'
> > > > > new_arr[4] = 'r'
> > > > > .....
> > > > >
> > > > > continuing "through" a[1] with the same new_arr
> > > > > new_arr[N] = 'r'
> > > > > new_arr[N+1] = 'g'
> > > > > ....
> > > > >
> > > > > -M
> > > >
> > > > Numpy can do this for you. First, do you really mean the array to
> > > > contain lists of one string each? If so:
> > > >
> > > > >>> import numpy
> > > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a
> > > > kludge here
> > > > >>> b
> > > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 
> 'b', 'a',
> > > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
> > > > 'b', 'b', 'a', 'a', 'a', 'a'],
> > > > dtype='|S1')
> > > > >>> b.shape=(2,4,4)
> > > > >>> b
> > > > array([[['r', 'r', 'r', 'r'],
> > > > ['g', 'g', 'g', 'g'],
> > > > ['b', 'b', 'b', 'b'],
> > > > ['a', 'a', 'a', 'a']],
> > > >
> > > > [['r', 'r', 'r', 'r'],
> > > > ['g', 'g', 'g', 'g'],
> > > > ['b', 'b', 'b', 'b'],
> > > > ['a', 'a', 'a', 'a']]],
> > > > dtype='|S1')
> > > > >>> c = b.transpose((2,0,1))
> > > > >>> c
> > > > array([[['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']]],
> > > > dtype='|S1')
> > > > >>> d=c.copy() # To make it contiguous
> > > > >>> d.shape = (32,)
> > > > >>> d
> > > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 
> 'a', 'r',
> > > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
> > > > 'b', 'a', 'r', 'g', 'b', 'a'],
> > > > dtype='|S1')
> > > >
> > > > Done. Cool no?
> > > >
> > > > Gary Herron
> > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > From: marlin_rowley at hotmail.com
> > > > > To: robert.kern at gmail.com; python-list at python.org
> > > > > Subject: RE: numpy.frombuffer != unpack() ??
> > > > > Date: Fri, 16 May 2008 17:31:30 -0500
> > > > >
> > > > > Thank you! That solved it!
> > > > >
> > > > > -M
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > >
> > > > > > To: python-list at python.org
> > > > > > From: robert.kern at gmail.com
> > > > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > > > > Date: Fri, 16 May 2008 17:25:00 -0500
> > > > > >
> > > > > > Marlin Rowley wrote:
> > > > > > > All:
> > > > > > >
> > > > > > > I'm getting different floating point values when I use numpy
> > > > > vs. unpack().
> > > > > > >
> > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> > > > > > > buffer = unpack("!f", byte)
> > > > > > >
> > > > > > > frgba[0] != buffer[0]
> > > > > > >
> > > > > > > why? This is forcing me use the unpack() function since it's
> > > > > giving me
> > > > > > > the correct values. What am I doing wrong?
> > > > > >
> > > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for
> > > > > '>'). Most
> > > > > > likely, you are on a little-endian platform. All of the dtypes
> > > > > in numpy default
> > > > > > to the native-endianness unless specified. If you want to read
> > > > > big-endian data
> > > > > > using numpy, do this:
> > > > > >
> > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
> > > > > >
> > > > > > If you have any more problems with numpy, please join us on the
> > > > > numpy mailing
> > > > > > list. When reporting problems, please try to provide a small but
> > > > > complete
> > > > > > snippet of self-contained code, the output that you got, and
> > > > > explain the output
> > > > > > that you expected to get. Thank you.
> > > > > >
> > > > > > http://www.scipy.org/Mailing_Lists
> > > > > >
> > > > > > --
> > > > > > Robert Kern
> > > > > >
> > > > > > "I have come to believe that the whole world is an enigma, a
> > > > > harmless enigma
> > > > > > that is made terrible by our own mad attempt to interpret it as
> > > > > though it had
> > > > > > an underlying truth."
> > > > > > -- Umberto Eco
> > > > > >
> > > > > > --
> > > > > > http://mail.python.org/mailman/listinfo/python-list
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > E-mail for the greater good. Join the i?m Initiative from
> > > > > Microsoft.
> > > > >
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
> > > > >
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > E-mail for the greater good. Join the i?m Initiative from 
> Microsoft.
> > > > >
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > >
> > > > > --
> > > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > Keep your kids safer online with Windows Live Family Safety. Help
> > > protect your kids.
> > > 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Keep your kids safer online with Windows Live Family Safety. Help 
> protect your kids. 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From dannywebster at googlemail.com  Fri May  9 11:44:49 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 08:44:49 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<2bbcd24b-d36d-47dd-a0fa-4d7333e85fef@a23g2000hsc.googlegroups.com>
Message-ID: <e0b64b5f-5def-4bef-bb4e-f03c364457ea@k10g2000prm.googlegroups.com>

On May 9, 4:09 pm, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 9, 10:10 am, dannywebs... at googlemail.com wrote:
>
> > Hello all,
>
> > I have a dictionary of which i'm itervalues'ing through, and i'll be
> > performing some logic on a particular iteration when a condition is
> > met with trusty .startswith('foo').  I need to grab the previous
> > iteration if this condition is met.  I can do something with an extra
> > var to hold every iteration while iterating, but this is hacky and not
> > elegant.
>
> Often when you're iterating, 'hacky' code can be lifted out into a
> separate generator, keeping the details of the hacks nicely away from
> your code. That's true here...
>
> def iterprevious(seq):
>     """Generate pairs of (previous element, current element)
>     from seq."""
>     last = None
>     for x in iter(seq):
>         yield last, x
>         last = x
>
> Then, when you want use it...
>
> for previous, (key, value) in iterprevious(d.iteritems()):
>     ... In the loop, previous will either be None if we're on the
> first element, otherwise (previous_key, previous_value).
>
> --
> Paul Hankin


Hi all - some good stuff here.  Thanks for the info, I have a few
ideas
to play with.

thanks again

dan.



From ghirai at ghirai.com  Mon May 19 17:45:00 2008
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 20 May 2008 00:45:00 +0300
Subject: Newbie: Keep TCP socket open
In-Reply-To: <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
Message-ID: <20080520004500.25b2f908.ghirai@ghirai.com>

On Mon, 19 May 2008 20:25:57 +0100
"Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks for the feedback.
> 
> Using the socket in a list is great
> 
> However, as i imagined, I now get a limit of around 1500 conns before
> the system crashes out, also i have noticed, that the ports loop back
> to 1025 when they hit 5000.
> 
> Any ideas on how to make the list/socket get to around 50K
> 
> TIA
> 

Try to use scapy to send raw empty packets with S flag set.
Also use Linux/BSD if you're trying this on Windows.

-- 
Regards,
Ghirai.


From kamhung.soh at gmail.com  Sat May 10 21:54:00 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 11:54:00 +1000
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <op.uayvkafsev04yd@hungvista>

On Sun, 11 May 2008 11:12:37 +1000, globalrev <skanemupp at yahoo.se> wrote:

> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
>
>
> is there a better way than my solution? is mine ok?

Looks OK to me.

A different version, and I test for multiples of 3 and 5 first:

map(lambda x: (not x%3 and not x%5 and "FizzBuzz") or (not x%3 and "Fizz")  
or (not x%5 and "Buzz") or x, xrange(1,101))

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From jeffober at gmail.com  Thu May  1 11:03:24 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 08:03:24 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <c00a0e58-015c-48ef-be02-6c18bcd96b9e@27g2000hsf.googlegroups.com>

If no other threads will be accessing the counter, there will be no
problem.


From aaron.watters at gmail.com  Mon May  5 14:26:46 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Mon, 5 May 2008 11:26:46 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
Message-ID: <43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>

Hi there.  Maybe a little more context would
help us figure out what you want here...

On May 5, 1:28 pm, castiro... at gmail.com wrote:
> Is multimap just a syntax-checked dictionary of mutable sequences?

I think the equivalent of a multimap can be
implemented several different ways, depending on
what you need:

  for
       1 maps to 2,3
       5 maps to 7
  - dictionary mapping to lists
       { 1:[2,3], 5:[7] } # supports unhashable values
  - dictionary mapping to dictionary
       { 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
and dense data
  - dictionary with tuple/pairs as keys
       { (1,2):None, (1,3):None, (4,7):None } # streamlined for
existence testing

If you search usenet (google groups) for multimap
you will find some nice discussions by Alex Martelli and others.

> Is def( a ): a[:]= [x] a trick or part of the language?  It looks
> pretty sharp in variable-width.

You lost me here.

python 2.6:
>>> def (a): a[:]=[x]
  File "<stdin>", line 1
    def (a): a[:]=[x]
        ^
SyntaxError: invalid syntax

All the best.  -- Aaron Watters

===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=gaping+security+hole


From maxerickson at gmail.com  Wed May 28 10:09:08 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 28 May 2008 14:09:08 +0000 (UTC)
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<3e473cc60805280440k7156b74cla6342419359441cd@mail.gmail.com>
Message-ID: <Xns9AAC67428BEE1maxericksongmailcom@80.91.229.13>

"Mathieu Prevot" <mathieu.prevot at gmail.com> wrote:

> 2008/5/28 Diez B. Roggisch <deets at nospam.web.de>:
>> Ankit wrote:
>>
>>> Hi everyone,i wanted to build a flash decoder using python can
>>> somebody tell me which library to use and what steps should i
>>> follow to make a flash(video) decoder?By a decoder i mean that
>>> i need to display all the pixel values of each frame.Waiting
>>> for your replies. 
>>
>> Check out libffmpeg. It should be accessible using python by
>> various means, including gstreamer or ctypes.
>>
>> This is however a rather advanced topic.
>>
>> Diez
> 
> I think you might want make an ffmpeg/libffmpeg python wrap. It
> could be really useful, and faster than a pure python decoder.
> Even for fun. 
> 
> Cheers
> Mathieu
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

It even already exists. There is a binary interface that is 
maintained alongside pyglet:

http://code.google.com/p/avbin/

and then ctypes wrapper for that interface in pyglet:

http://code.google.com/p/pyglet/source/browse/trunk/pyglet/media/avb
in.py
http://www.pyglet.org/doc/programming_guide/sound_and_video.html

I haven't used either one, but it's where I would start.


Max



From castironpi at gmail.com  Thu May 15 22:26:39 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:26:39 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com> 
	<76eda66f-0075-41b4-9bd8-404db917a323@k13g2000hse.googlegroups.com>
Message-ID: <11f4f605-b421-4b05-bed9-7d199bdf9d35@59g2000hsb.googlegroups.com>

On May 15, 6:52?pm, afrobeard <afrobe... at gmail.com> wrote:
> l.__delslice__(0,len(l)) is an expression as it returns None which is
> a value
>
> On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
> > On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
> > > The following proposed solution is not intended to be a solution, it
> > > goes completely against the zen of python. [Type import this into the
> > > python command interpreter]
>
> > > I brought it down to two lines:-
>
> > > l = range(6)
> > > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > > itertools would still be a better approach in my opinion.
>
> > > Just because I'm curious to know, can anyone bring it shorter[even if
> > > its cryptic] than this without invoking any Python Library.
>
> > > P.S. Once again I would not recommend using this as Explicit is better
> > > than Implicit
> > > P.P.S. It is strongly undesirable for us humans to use anything
> > > starting with __ :)
>
> > > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > > | It seems that I rather frequently need a list or iterator of the form
> > > > > | [x for x in <> while <>]
>
> > > > > I can think of two ways to interpret that.
> > > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > > >> the expression <B> is false.
>
> > > > def gen(a):
> > > > ? ? for x in a:
> > > > ? ? ? ? if B: break
> > > > ? ? ? ? yield x
>
> > > > a_gen = gen(A)
>
> > > > # now iterate over a_gen
>
> > > > --
> > > > Geoff- Hide quoted text -
>
> > > - Show quoted text -
>
> > In your original, you have:
>
> > > l = range(6)
> > > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > You may be hyperextending the use of '..if..else..', which is one of
> > my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> > an expression.- Hide quoted text -
>
> - Show quoted text -

Functional programming is really important to a former professor of
me.  I like to say that None returns as a value.  I think you can call
functional "evaluational".


From hv at tbz-pariv.de  Fri May  9 08:07:56 2008
From: hv at tbz-pariv.de (Thomas Guettler)
Date: Fri, 09 May 2008 14:07:56 +0200
Subject: xml.etree Syntax of path?
In-Reply-To: <4824211C.8040409@behnel.de>
References: <68ij33F2tl90fU1@mid.individual.net> <4824211C.8040409@behnel.de>
Message-ID: <68it4sF2sh11cU1@mid.individual.net>

Stefan Behnel schrieb:
> Thomas Guettler wrote:
>> I think the documentation of xml.etree is missing something[1].
>>
>> {{{
>> find(path)
>>     Finds the first toplevel element with given tag. Same as
>> getroot().find(path). path is the element to look for.
>> }}}
>>
>> According to the source etree has limited support for xpath. I think it
>> should be documented what 'path' should look like to.
> 
> You mean like this?
> 
> http://effbot.org/zone/element-xpath.htm

Yes, since etree is part of the standard library, the documentation
should be there, too. Or at least a link should be provided.

  Thomas

-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de


From basti.wiesner at gmx.net  Sat May 31 05:58:02 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 11:58:02 +0200
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
	<g1p3np$pvf$01$1@news.t-online.com>
	<mailman.1785.1212188702.12834.python-list@python.org>
Message-ID: <g1r7fb$h8r$03$1@news.t-online.com>

[ Kris Kennaway <kris at FreeBSD.org> ]

> Sebastian 'lunar' Wiesner wrote:
>> 
>> Illustrates, how to use socket credentials without sendmsg/recvmsg and so
>> without any need for patching.
>>  
> Thanks to both you and Paul for your suggestions.  For the record, the
> URL above is linux-specific, 

D'oh, sorry, I didn't know this ... I'm not a unix expert, I just remembered
that article when reading your question ;)


-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From radim.marek at gmail.com  Wed May  7 07:00:08 2008
From: radim.marek at gmail.com (radim.marek at gmail.com)
Date: Wed, 7 May 2008 04:00:08 -0700 (PDT)
Subject: FreeBSD KeyboardInterrupt not captured
Message-ID: <96da774d-2746-4c5e-9947-e36860dd7461@p39g2000prm.googlegroups.com>

Hi Guys,

during testing of my project on FreeBSD I've discovered stange
'feature' of time.sleep(). It works if single thread is running, but
when multi-threaded, the SIGINT signal seems not to be handled in same
way.

I've found three discussion about similar behavior with os.system()
but so far none of the suggested patches worked.

I've limited test to following code:

import time
import sys
import threading

class MyThread(threading.Thread):
        def __init__(self):
                super(MyThread, self).__init__()
                self.start()

        def run(self):
                while True:
                        try:
                                time.sleep(10)
                        except KeyboardInterrupt:
                                print 'thread keyboard interrupt'

def main():
        my = MyThread()

        while True:
                try:
                        time.sleep(5)
                except KeyboardInterrupt:
                        print 'got it'

if __name__ == '__main__':
        main()


Any suggestions?

Best regards,

Radim


From ganbusiness at gmail.com  Fri May 23 05:47:38 2008
From: ganbusiness at gmail.com (dasasdfd)
Date: Fri, 23 May 2008 02:47:38 -0700 (PDT)
Subject: online money earnings
Message-ID: <c4ccc239-89be-48ca-ba6c-45cbdbbe943a@l17g2000pri.googlegroups.com>

online money earnings
value of money
money is the life
http://moneylife0123.blogspot.com/


From mail at timgolden.me.uk  Wed May  7 05:45:36 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 10:45:36 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <48216129.5090405@timgolden.me.uk>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
Message-ID: <48217A40.5080808@timgolden.me.uk>

In a spirit of being helpful... :)

The code below (which I imagine every Windows programmer writes
sometime in their Python life) mimics the os.walk functionality, yielding
the key, subkeys, and values under a particular starting point in the
registry. The "if __name__ == '__main__'" test run at the bottom does
more-or-less what you were asking for originally, I think, converting
some name to some other name wherever it appears.

<module regwalk.py>
import _winreg

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
}

class RegKey:
  
  def __init__ (self, name, key):
     self.name = name
     self.key = key
  
  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.
  
  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  if "\\" not in top: top += "\\"
  root, subkey = top.split ("\\", 1)
  key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ | _winreg.KEY_SET_VALUE)
  
  subkeys = []
  i = 0
  while True:
    try:
      subkeys.append (_winreg.EnumKey (key, i))
      i += 1
    except EnvironmentError:
      break
  
  values = []
  i = 0
  while True:
    try:
      values.append (_winreg.EnumValue (key, i))
      i += 1
    except EnvironmentError:
      break

  yield RegKey (top, key), subkeys, values
  
  for subkey in subkeys:
    for result in walk (top + "\\" + subkey):
      yield result
  
if __name__ == '__main__':
  for key, subkey_names, values in walk ("HKEY_LOCAL_MACHINE\\Software\\Python"):
    print key
    for (name, data, type) in values:
      print "  ", name, "=>", data
      if type == _winreg.REG_SZ and "TJG" in data:
        _winreg.SetValueEx (key.key, name, 0, type, data.replace ("TJG", "XYZ"))

</module regwalk.py>

TJG


From kyosohma at gmail.com  Fri May  2 14:52:30 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 11:52:30 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com> 
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
Message-ID: <6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>

On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
> Mike Driscoll wrote:
> > On Apr 29, 8:56 am, TkNeo <tarun.... at gmail.com> wrote:
> >> I need to do SSL file transfer using python? Is there a library i can
> >> use ?
>
> >http://sandbox.rulemaker.net/ngps/m2/
>
> M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> --
>   Heikki Toivonen

Whoops...I just went with the first link Google gave me. The link I
gave doesn't mention that the project has moved. Looks like the one
you link to is the 9th link on my Google search using the terms:
"python m2crypto".

Sorry if I spread misinformation though.

Mike


From vivainio at gmail.com  Tue May  6 13:22:42 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Tue, 06 May 2008 17:22:42 GMT
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
Message-ID: <8763tr5ov1.fsf@gmail.com>


Excuse the long post.

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>> I guess it's safe to assume that you are not opposed to using code
>> based on more liberal license, right? :-)
>
> I'm less inclined to base work on, or contribute to, a work under a
> non-copyleft license, because I have less assurance that the code will
> remain free for all recipients.

In practice, the probability of hijacking of source code by an evil
corporation is very low for most projects. And even when it did
happen, the evil corporation would likely submit patches. The more
users an open source project has, the better.

Also, you can do what Paul Boddie did - fork the project, or maintain
patches that are under LGPL. With a liberal license, you have that 
privilege.

> There's no single free-software license that won't displease some
> segment of the free-software community. I think the Vellum project

I don't think BSD/MIT like license really annoys anyone. Think python
here ;-)

I'm also answering some points by Zed here (assuming they were meant
for mailing list):

>  Well, I'm also telling people that it's like the GNU toolchain in that
>  using it doesn't mean your stuff is GPLed.  Just if you import it as
>  a library or write commands for it that you release.

I realize this - there is a difference here between tools that you run
and tools that you link to / import. However, Vellum could be in the
middle ground, since the commands you create do link with Vellum.

>  Ok, so for you it's a religious thing more than a technical capability
>  or limitation thing?  Does that mean you use a BSD alternative for
>  everything GNU, like GCC as well?

Not at all, it's a very practical thing related to all the
intellectual property lawyerage in corporate setting. With Vellum, it
doesn't matter a lot because most of the tools are only used in-house,
but it would still be nice if you could just grab the code from
somewhere without having to think about license at all, or considering
whether any of this would ever be needed for something that involves
selling stuff under proprietary license.

To stay on topic of Vellum, let's consider the scenario where someone
digged Vellum's syntax, and would like to use the parser in a
proprietary app - or create commands that include proprietary stuff
(it's not the developer's call, but the corporate policy). Vellum
parser would be only a small component in the whole system. Would you
rather make the developer:

- Find some other, inferior parser with more liberal license or
reimplement Vellum syntax from spec (typical "nah, this is gpl, I
can't use this, continue with the next google hit" scenario)

- Just grab the Vellum implementation and use it without concern or
management discussions, yielding yet another developer that saved some
time, had more coffee breaks and possibly hit the deadline early,
recommending Vellum code to his colleagues as a good starting point to
whatever they are doing, and perhaps contributing some code or ideas
back?

Note that this applies mostly to small tools / libs. Big projects like
Linux kernel, Gnome or KDE have to be seriously concerned about
malicious use of their intellectual property, but a small open source
tool is more likely to be (initially) picked up by an individual
developer who thinks something is cool; and it will never be the
money-making part of the product.

Also, for some reason, GPL is used for evil (dual-licensing schemes -
make money but still gain the open source mindshare, and possibly rack
up free contributions to something that is your *commercial product*)
more often than it's used for good (gcc, Linux kernel - prevent IP
exploitation and ensure that all improvements are freely accessible).

I must say that if I implemented something I want to make money on at
some point, I would license it under GPL. If I'm just scratching my
own itch, having fun or racking up open source feelgood karma, I would
use MIT (or BSD, as we are doing w/ IPython). So I'm not opposed to
GPL - just saying that it's not often the choice that will net you the
most users.


From goldnery at gmail.com  Mon May 26 15:06:02 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 12:06:02 -0700 (PDT)
Subject: Keyboard Events
Message-ID: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>

I use WX on windows XP and I try to generate an event when the user is
clicking the keyboard while the application frame is not in focus.
All I manged to do were while the application frame is in focus
Can someone please show me how to do it?

Thanks !


From castironpi at gmail.com  Tue May 13 20:32:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 17:32:24 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
Message-ID: <fb7637a8-886b-4218-8314-5bbb78f8e3f3@a1g2000hsb.googlegroups.com>

On May 13, 2:41?pm, "inhahe" <inh... at gmail.com> wrote:
> "George Sakkis" <george.sak... at gmail.com> wrote in message
>
> news:0563506d-bd36-404d-8961-4c4c5d1cc029 at t54g2000hsg.googlegroups.com...
>
> > On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:
>
> >> Any programming that helps you solve a problem is fun and
> >> recreational. At least, that's how I look at it. I suppose it really
> >> depends on why you're doing it, what your objective is, etc. But I'd
> >> say, why not?
>
> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > you can safely ignore its posts.
>
> How does it generate text?

This is a Python newsgroup, so I can post my own code.  (Which makes
Python a layer of standardization.)  However it's long.  Did you want
any modules in particular, or shall I just start the top?


From skanemupp at yahoo.se  Fri May 16 09:11:55 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:11:55 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
Message-ID: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>

On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> globalrev a ?crit :
>
> > wassup here?
>
> > 7
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > <module>
> >     print cust1.getID()
> > AttributeError: 'NoneType' object has no attribute 'getID'
>
> > class customer:
>
> 1/ naming convention : class names should be CamelCased
> 2/ unless you need compatibility with years old Python versions, use
> newstyle classes
>
> class Customer(object):
>
> >     def __init__(self, ID, movies):
> >         self.ID = ID
> >         self.movies = movies
>
> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>
>      def __init__(self, id, movies):
>          self.id = id
>          self.movies = movies
>
> >     def getID():
> >         return self.ID
>
> >     def getMovies():
> >         return self.movies
>
> 4/ Python has support for computed attributes, so you just don't need
> these getters.
>
>
>
> > import os
> > import customer
> > import movie
>
> > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > mv1str = mv1.read()
>
> > print mv1str.count(',5,')
>
> > cust1 = customer.__init__('12',['1','435','2332'])
>
> __init__ is automagically called on instanciation, so you don't have to
> call it yourself. And FWIW, your __init__ returns None.
>
> cust1 = Customer('12', ['1', '435', '2332'])
>
> > print cust1.getID()
>
> print cust1.id

print "cust", cust1.idnbr, cust1.movies()

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
<module>
    print "cust", cust1.idnbr, cust1.movies()
TypeError: 'list' object is not callable

when class =
class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies

print "cust", cust1.idnbr, cust1.movies()

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
<module>
    print "cust", cust1.idnbr, cust1.movies()
TypeError: 'list' object is not callable

when class =
class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies



From tommy.nordgren at comhem.se  Sun May 18 14:49:59 2008
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sun, 18 May 2008 20:49:59 +0200
Subject: Get all the instances of one class
In-Reply-To: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>


On 17 maj 2008, at 01.44, Terry wrote:

> Hi,
>
> Is there a simple way to get all the instances of one class? I mean
> without any additional change to the class.
>
> br, Terry
> --
> http://mail.python.org/mailman/listinfo/python-list


class MyClass : a_base_class
       memberlist=[]

#  Insert object in memberlist when created;
#  note: objects won't be garbage collected until removed from  
memberlist.
-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
tommy.nordgren at comhem.se






From notbob at nothome.com  Sat May 10 15:25:56 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 19:25:56 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
Message-ID: <8FmVj.567$PE5.322@fe087.usenetserver.com>

On 2008-05-10, notbob <notbob at nothome.com> wrote:

> BTW, anyone know a better cli news client/editor combo than slrn/jed (don't
> even think vi!)?  When I cp/past code (or most anything else) to jed, all
> the lines become stair-stepped.  This is no biggie for a most stuff, but for
> idented code, it's unacceptable.  

Whoo-hoo!  I just got emacs config'd to do python.  Let's see how that works.

nb


From vivainio at gmail.com  Sun May 25 04:47:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 25 May 2008 08:47:01 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
Message-ID: <87tzgm3h4q.fsf@gmail.com>

Fuzzyman <fuzzyman at gmail.com> writes:


>> Perhaps a lint-like validation tool would be optimal for this
>> problem...
>
> So we can refuse to execute their code if they use private APIs?

No, but it could complain and point out the exact offending lines,
pointing their development effort to right direction.

> Proxying so that we can really hide our internal APIs is a better
> solution.

How about pyprotocols and other interface packages?

Proxying is pretty workable too, and it easily makes sense that the
official API objects should be different from the logic executing
objects.


From castironpi at gmail.com  Wed May 14 19:41:27 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:41:27 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<mailman.1130.1210789334.12834.python-list@python.org>
	<d609d636-7dd3-43df-810b-7188560842ba@d1g2000hsg.googlegroups.com>
Message-ID: <78f31576-0e45-4e62-ae71-cd366b010715@59g2000hsb.googlegroups.com>

On May 14, 6:28?pm, castiro... at gmail.com wrote:
> On May 14, 1:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwe... at gmail.com> wrote:
> > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> > >> "George Sakkis" <george.sak... at gmail.com> wrote in message
> > >> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > >> > you can safely ignore its posts.
>
> > >> How does it generate text?
>
> > > My guess is by inhaling a lot of intoxicants.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > I assumed his message with the subject "bytes1.shuffle()" from a few
> > days ago was a glimpse into his source code. ?Or something like it.
>
> I am trying to select a color. ?It's color select.py. ?Any thoughts?

I was trying to select a font.  It was font select.py.  Why did I say
color?


From wizzardx at gmail.com  Sun May  4 18:36:37 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 00:36:37 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
Message-ID: <18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>

> >
> Thank you very much for your comprehensive answer and detailed informations,
> David; I really appreciate it!

You're welcome.

>
> As for the number of items, there would be approx. 34 000 calls of execute()
> in my present code, in the final version probably more; I think executmany
> is more efficient here, if there aren't any drawbacks.

executemany is probably a good idea here. If memory becomes a problem
at some point (eg: millions of lines) you'll probably want to use an
on-disk database (I suggest postgresql), and read in batches of say
1000, which you save to the database with a single executemany.

>  I thought a database would perform much better in such cases (and the
> preliminary tests confirm this);

It sounds like your Python code has some serious (algorithm or data
structure) problems. Python code (with appropriate dictionaries,
caches, memoization etc) should always be able to perform better than
an in-memory SQL database (even optimized with indexes, etc). You
definitely need to check that. You don't even create any db indexes
(in the code you gave), but sqllite still performs better than your
structs which do use dicts!

Basically what you're saying is that (the equivalent, but with SQL
overhead) of a set of lists containing tuples, iwthout any dicts for
lookup, performs better than your original sructure.

Unless you actually need a database (too much data for memory, or you
need persistant data, possibly for sharing between apps) I suggest
sticking to Python structures, and optimizing your structures and
look-up algorithms.

One reasonable reason for you to use a database would be if
maintaining your dicts (for fast lookup) became too complicated and
you wanted the DBM to keep indexes automatically updated for you.

> however now I see the possible risks too.
> I'll look into other possible approaches. There will be clearly a finite set
> of the column names, hence it is possible to define the db at the beginning
> and fill it with values only after parsing the texts; the problem is, this
> can't be done untill the texts are available, I just thought, a more generic
> approach would be be more easily extensible and also a bit simpler.

If you don't know in advance what the fields are, then how does your
python app work? Are all queries in the user interface (that refer to
this database) all arbitrary and initiated by a human?

Also, how do you setup foreign relationships between tables, and
indexes (for performance), if you don't know what fields are going to
be present?

Maybe this would be more clear (to me) if you gave a short example of
the data, with a note or two to explain where there are performance
problems.

> the parsing the text to get the tags with their values are done in the
> program itself

What kind of tags? From your description it sounds like you have
markers inside the text (basically bookmarks with arbitrary metadata,
hence your need for dynamic schema), which the user can query, so they
can quickly jump between parts of the text, based on their search
results. Is this about right?

> Just for information, what are valid table and column names in sqlite?
> (Unfortunately, I couldn't find any reference for that (maybe except the
> reserved sqlite_master);  as quoted names, everything I tried, worked fine,
> also whitespace, various unicode characters etc.; of course, I can imagine,

I'm not sure about that.

If you want to be safe:

1) Add a prefix to your table and field names
2) 'normalise' all table and field names (eg: convert to lower case,
remove non-alphabetic characters, etc).
3) Make sure that you don't get the same 'normalised' name for 2
different incoming strings.
4) Be prepared to scrap the schema-generating approach if your app's
database requirements change (eg: you need to share the db with other
apps which have their own tables that you don't want to stomp over).

David.


From foul_ole_ron1 at yahoo.com  Fri May 23 03:12:35 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 00:12:35 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
Message-ID: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>

Hello all,

I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
error trying to do operations on a string list after importing numpy.
Minimal example:

[start Python]

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>> a=['1','2','3']
>>> all(a)
True
>>> from numpy import *
>>> all(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
982, in all
    return _wrapit(a, 'all', axis, out)
  File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
37, in _wrapit
    result = getattr(asarray(obj),method)(*args, **kwds)
TypeError: cannot perform reduce with flexible type

[end of example]

It seems that Python calls numpy's "all" instead of the standard one,
is that right? If so, how can I call the standard "all" after the
numpy import? ["import numpy" is not a desirable option, I use a lot
of math in my progs]

Is there another way around this error?

Marc


From deets at nospam.web.de  Mon May 12 10:34:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 16:34:39 +0200
Subject: frameword vs application server?
In-Reply-To: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
References: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
Message-ID: <68r2sbF2tjrl5U1@mid.uni-berlin.de>

walterbyrd schrieb:
> Can somebody help me understand the difference? Not just where Python
> is concerned, but in general?
> 
> As I understand it, an application server is supposed to be a great
> help in developing apps, because most of the business logic is already
> there. It seems to me that, usually when applications servers are
> discussed, people are talking about Java.

First of all, this is a misconception. An app-server may provide a wide 
range of infrastructure, however this has nothing to do with business 
logic. THat can merely pick parts of that infrastructure to build upon. 
But the distinction to a powerful framework is slim enough.

And it should be (and has been often so) said that especially in the 
java-world, app-servers and the specifications the implement (j2ee) are 
over-engineered and complicated.

> I suppose most popular Python frameworks incorporate an application
> server, but I get the idea that those app servers are not nearly as
> sophisticed as something like JBoss.

The sophistication is a matter of perspective - some of it stems from 
the fact that in java, you need a lot more code to make even pretty 
simple things work. Think of delegation to business objects (session 
beans) that get their respective calls wrapped so that they take place 
inside a transactional context.

Which involves a great deal of design-abstractions, code-generators and 
tons of XML to glue these together.

Or three lines of code in python...


> I am not sure if a Python app server, that works like a Java app
> server would make sense.

As mentioned above - in some aspects, that is not really needed. But if 
you want more of an app-server, have a look at ZOPE, Kamaelia and maybe 
even twisted.

Diez


From george.sakkis at gmail.com  Wed May  7 10:05:31 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 07:05:31 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de> 
	<fvsbgf$mev$1@aioe.org>
Message-ID: <1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>

On May 7, 9:40?am, pistacchio <pistacc... at gmail.com> wrote:

> Diez B. Roggisch ha scritto:
>
>
>
> > pistacchio wrote:
>
> >> Mike Driscoll ha scritto:
> >>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
> >>>> hi! i'm a php user and a python programmer. i'd love to use python for
> >>>> my server side needs but i can't seem to find what i'm looking for. for
> >>>> most of my php work i use mysql and tinyButStrong
> >>>> (http://www.tinybutstrong.com) which is a very lightweight template
> >>>> engine that offers powerful functionalities. you insert TBS tags in web
> >>>> pages like:
>
> >>>> <div align="center" class="title-page"> [var.x] </div>
>
> >>>> and it replaces [var.x] with the value of global variable x. it also
> >>>> makes blocks (and nested blocks) easy to implement:
>
> >>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
> >>>> [blk1;block=end] </p>
>
> >>>> in the previous code it cycles throu all the values of the array blk1.
>
> >>>> it does many more things, like htlm escaping, url and js encoding etc,
> >>>> conditional displaying etc, but it is not more confusing that inserting
> >>>> pieces of code into the HTML (aka: littering the code and kissing
> >>>> goodbye to the code/presentation separation). it comes in the form of a
> >>>> single file with a single class that you can easily include in the code
> >>>> and go.
>
> >>>> now, i've searched the net and it seems full of python-based frameworks
> >>>> for doing server side scripting and templating, but none that suits my
> >>>> needs.
>
> >>>> ? ? 1. i like writing code and i like control. i mean, open up the
> >>>> simplest text editor and write in it. i don't want something that is
> >>>> command-line driven or that writes code for me like ">>>
> >>>> makePagesFromThisDatabase()".
> >>>> ? ? 2. i want something very lightweight. i don't want dozen of options,
> >>>> pre-made blogging parts ecc. i just need a good non invasive template
> >>>> engine and the basic functions for server side scripting, like session
> >>>> managing, request parsing, functions to manipulate html code (encodings
> >>>> etc)
> >>>> ? ? 3. i don't want to beg my hosting provider to install the libraries.
> >>>> a simple include file should do the work.
> >>>> ? ? 4. object oriented programming is not required (better: i prefer
> >>>> plain old procedural programming).
>
> >>>> any help? thanks in advance
> >> hi, thanks for replaying
>
> >>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
> >>> and Genshi in 2.x (I think) for templating purposes. There's also
> >>> Cheetah, one of the more powerful Python templating engines out there.
>
> >> django is exacly the kind of giant i'm trying to avoid
>
> >>>http://genshi.edgewall.org/
> >> the first lines of the tutorial read:
> >> "First, make sure you have CherryPy 3.0.x installed"
> >> Now, cherrypy is something that is not properly "include a file and get
> >> going!"
> >>>http://www.kid-templating.org/
> >> kid seems to have a non-linear approach, but i may give it a try
>
> >>>http://www.cheetahtemplate.org/
> >> cheetah was something that i already considered using. have i to
> >> "install" it or can i just import it?
>
> > You will need to install any of these. It is part of how python is designed.
> > Extendability comes with a price-tag.
>
> well, the problema is exacly that i'm looking for a python module, not
> for a python library.

What does it matter if it's a single file or a dozen under a package ?
"Installation" for pure Python packages can be as simple as copying
the package under any directory in your PYTHONPATH.

Check out Mako (http://www.makotemplates.org/), it's pretty powerful
and fast.

George


From danb_83 at yahoo.com  Mon May 26 22:51:48 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Mon, 26 May 2008 19:51:48 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <b5bf2f79-5f6e-44c0-9ecb-d91204ee7c64@e53g2000hsa.googlegroups.com>

On May 26, 9:46?pm, notnorweg... at yahoo.se wrote:
> >>> x
>
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
> >>> x
>
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>
>
>
> what do i need to do?

x.sort(key=str.upper)


From jeffober at gmail.com  Fri May  2 15:49:53 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:49:53 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
Message-ID: <6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>

The generally used idiom for that is:

lst = ['a', 'b', 'c']
if 'a' in lst:
  foo = lst.index('a')


From wxPythoner at gmail.com  Tue May 13 05:34:03 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 02:34:03 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
Message-ID: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>

Is that true that this comparison operators are gone in Python 3.0:

<    (is less than)
>    (is greater than)
<= (is less than or equals)
>= (is greater than or equals)

Is it true?


From neokosmos at gmail.com  Tue May 13 11:28:00 2008
From: neokosmos at gmail.com (Paul Miller)
Date: Tue, 13 May 2008 08:28:00 -0700 (PDT)
Subject: Literate programs in Python
Message-ID: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>

Does anyone know of any (preferably largish) examples of literate
programs written using Python?  Alternatively, does anyone know of any
literate programming tools which support Python well?  (I am aware of
Leo and I've been to literateprogramming.com, but any additional
pointers would be much appreciated!)

Thanks,

Paul


From hniksic at xemacs.org  Wed May 14 10:56:55 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 14 May 2008 16:56:55 +0200
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
	<87r6c5s71g.fsf@mulj.homelinux.net>
	<mailman.1118.1210772196.12834.python-list@python.org>
Message-ID: <87mymt7x3c.fsf@mulj.homelinux.net>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Wed, May 14, 2008 at 1:01 AM, Hrvoje Niksic <hniksic at xemacs.org> wrote:
>>  Have you tried it?  __len__ is in fact marginally slower because it
>>  involves a dict lookup, whereas the built-in len() knows how to cheat
>>  and invoke __len__ through a slot in the C type struct very
>>  efficiently.
>>
>>  $ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
>>  1000000 loops, best of 3: 0.24 usec per loop
>>  $ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
>>  1000000 loops, best of 3: 0.347 usec per loop
>
> For built-in types, sure.

Well, he did ask about list.  :-)

> For user-defined types in Python, it's the other way around:

Yes, in that case the C slot contains a generic wrapper that still has
to locate and call the Python function, which ends up being slower.
The point is that such microoptimizations rarely make a difference,
and even then the difference can be counterintuitive, as in the list
example.


From gagsl-py2 at yahoo.com.ar  Mon May 26 12:18:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 13:18:56 -0300
Subject: IOError in windows service
References: <483A85C6.20803@gmail.com>
Message-ID: <op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 06:41:26 -0300, Aspersieman <aspersieman at gmail.com> escribi?:

> I have a script (attached) that creates a windows service. Basically the
> service periodically runs a program 'program.exe'. This all works fine,
> but during testing I discovered that if I include any 'print' statements
> (used to debug the service when its run in 'debug' mode), when _not_ in
> debug mode, it throws an error:
>
> <error>
> The instance's SvcRun() method failed
>   File "C:\Python25\Lib\site-packages\win32\lib\win32serviceutil.py",
> line 785, in SvcRun
>     self.SvcDoRun()
>   File "C:\Program Files\Program\MyService.py", line 28, in SvcDoRun
>     print "Entering while loop..."
> <type 'exceptions.IOError'>: (9, 'Bad file descriptor')
> </error>
>
> I have removed the 'print' statements, after which the service runs
> fine, but was just curious to find out the reason for this error.

Usually services don't have a console attached so sys.stdout is invalid. Just don't print anything...

-- 
Gabriel Genellina



From pistacchio at gmail.com  Mon May 12 05:11:27 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 02:11:27 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com> 
	<VuTVj.40306$o06.27577@tornado.fastwebnet.it>
Message-ID: <9af51496-5840-4f53-ae71-0d9c0da6c2f4@34g2000hsh.googlegroups.com>

On 12 Mag, 10:47, Marco Mariani <ma... at sferacarta.com> wrote:
> pistacchio wrote:
> > On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> >> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> >>> hi to all!
> >>> can i load a module passing to it, automatically and as default, all
> >>> the caller's global variables to act as module's global variables?
>
> Are you positively sure you need this?
>
> Modifying imported modules is already quite fragile, but this.. it's
> basically a reversed(import *)
>
> It's quite messy. Where quite equals to "very"

well, i'm writing a module called pycatrix. within the module i have
compile / exec statements in a functions that work on global
variables. ( exec compiledTemplate in globals() ).

now, i don't want to be forced (or force the end user) to import to
call the module's function with a compulsory "globals()" as argument.


From arnodel at googlemail.com  Sat May 24 11:26:55 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 24 May 2008 16:26:55 +0100
Subject: raising an exception when multiple inheritance involves same base
References: <mailman.1529.1211637967.12834.python-list@python.org>
Message-ID: <m21w3r7mf4.fsf@googlemail.com>

Michael Hines <michael.hines at yale.edu> writes:

> Hello,
> I have a class factory that supports single inheritance but it is
> an error if the base appears twice. e.g
> class Foo(hclass(h.Vector), hclass(h.List)):
> should raise an exception since h.Vector and h.List are really the same
> extension class, HocObject.
>
> So far I have only been able to do this by iterating over __mro__ during
> creation of an object as in:
>
> def hclass(c):
>     class hc(hoc.HocObject):
>         def __new__(cls, *args, **kwds):
>             m = False
>             for x in cls.__mro__:
>                 if (type(x) == type(hc)):
>                     if m == True:
>                         raise HocError, 'Multiple inheritance...'
>                     m = True
>             kwds.update({'hocbase':cls.htype})
>             return hoc.HocObject.__new__(cls, *args, **kwds)
>     setattr(hc, 'htype', c)
>     return hc
>
> Is there a way to do the test earlier (e.g during creation of the Foo
> class when hclass is called the second time
> instead of during creation of a Foo object).

Yes, by giving hoc.HocObject a custom metaclass:

class MetaHocObject(type):
    def __new__(cls, name, bases, attrs):
        if len(bases) > 1:
            raise Exception("Only single inheritance allowed")
        return type.__new__(cls, name, bases, attrs)

class HocObject(object):
    __metaclass__ = MetaHocObject


That'll forbid descendants of MetaHocObject having several bases:

>> class A(HocObject): pass
... 
>>> class B(HocObject): pass
... 
>>> class C(A, B): pass
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 4, in __new__
Exception: Only single inheritance allowed
>>> 

HTH

-- 
Arnaud


From phd at phd.pp.ru  Fri May 30 09:10:25 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Fri, 30 May 2008 17:10:25 +0400
Subject: SQLObject 0.9.7
Message-ID: <20080530131025.GE32657@phd.pp.ru>

Hello!

I'm pleased to announce version 0.9.7, a minor bug fix release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.9.7

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.9.6
----------------

Small Features
~~~~~~~~~~~~~~

* Use VARCHAR(MAX) and VARBINARY(MAX) for MSSQL >= 9.0.

* Run post_funcs after RowDestroySignal.

Bug Fixes
~~~~~~~~~

* Fixed a minor bug in Set column.

* A bug fixed for RowCreatedSignal together with InheritableSQLObject:
  run post_funcs after the entire hierarchy has been created.

* Aggregate functions now honors 'distinct'.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From goldnery at gmail.com  Fri May 30 10:49:53 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 07:49:53 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
Message-ID: <d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>

On May 30, 3:43 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Gandalf wrote:
> > I have script which being triggered by pressing CTRL+Right mouse click
> > from any place in my O.P , Now I need to generate automatically event
> > like copy my selected item or double clicking the right mouse cursor
> > without user interfering.
> > how can i implement this width python?
>
> > thanks!
>
> You didn't tell us enough to answer your question.  What GUI are you
> using?  Nearly every one of them that I'm aware of allow you to register
> handlers for such events.
>
> -Larry
windows xp


From torriem at gmail.com  Thu May  8 19:04:26 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 08 May 2008 17:04:26 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <482386FA.10700@gmail.com>

wxPythoner at gmail.com wrote:
> Have a look at this:
> 
>>>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).

No python is correct.  you're expression parses this way, when converted
to a lisp-ish prefix expression:

(- (123 ** 0 ))

All calculators work this way, so I don't know why you are expecting
anything otherwise.

> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 
> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 
> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.
> --
> http://mail.python.org/mailman/listinfo/python-list



From eliben at gmail.com  Thu May 29 15:07:48 2008
From: eliben at gmail.com (eliben)
Date: Thu, 29 May 2008 12:07:48 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
	<d5f3147d-ce9c-4dc9-a36c-508f22f85254@l64g2000hse.googlegroups.com>
Message-ID: <38b7df61-b1ca-4cd9-b838-3431a70cff87@d1g2000hsg.googlegroups.com>

On May 29, 3:08 am, Matimus <mccre... at gmail.com> wrote:
> > I have a game class, and the game has a state. Seeing that Python has
> > no enumeration type, at first I used strings to represent states:
> > "paused", "running", etc. But such a representation has many
> > negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> I frequently use strings in place of enumeration in python. I have
> found it to be very useful. I'm curious about the _many negatives_ you
> have found?
>
> For example, I wrote a module and one of the parameters to a function
> was `mode`. Two of the modes were ALL_MODE and ONE_MODE.
>
> At first I enumerated the modes:
>
> MODES = ALL_MODE, ONE_MODE = 0, 1
>
> And code using the mode tended to look something like this:
>
> from package import module
> module.foo(mode=module.ALL_MODE)
>
> Of course, the following would also work, but isn't self descriptive:
>
> module.foo(mode=0)
>
> Then, after some user feedback I changed it to this:
>
> MODES = ALL_MODE, ONE_MODE = "all one".split()
>
> This maintained backwards compatabilty, but users could use the much
> more concise (but still readable) version:
>
> module.foo(mode="all")
>
> Since then, I have adopted using strings in place of enum types as a
> best practice.
>
> Matt

The problem with naming strings explicitly has to do with type safety.
If you make a mistake in a parameter's name, it won't be detected by
the interpreter and you can run into weird errors later. The other
problem is that all the possible options are not documented in one
convenient place, but you solved it by using a mixed approach of
uppercase "constants" having the values of strings.

Eli


From ivan.illarionov at gmail.com  Wed May  7 17:46:38 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 21:46:38 +0000 (UTC)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <fvt7vt$3pd$1@news.mtu.ru>

On Wed, 07 May 2008 13:13:40 -0700, dmitrey wrote:

> hi all,
> could you inform how to print binary number? I.e. something like
> 
> print '%b' % my_number
> 
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
> 
> Thank you in advance, D

Here it is:

def bin(x, digits=0):
    oct2bin = ['000','001','010','011','100','101','110','111']
    binstring = [oct2bin[int(n)] for n in oct(x)]
    return ''.join(binstring).lstrip('0').zfill(digits)

>>> bin(5)
'101'
>>> bin(0x0FFF, 16)
'0000111111111111'
>>> bin(5, 8)
'00000101'

-- 
Ivan


From workitharder at gmail.com  Sat May 24 01:58:53 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 22:58:53 -0700 (PDT)
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>

On May 23, 6:31?pm, Yosifov Pavel <aqua... at gmail.com> wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?
>
> --
> /Pavel

I know that pychecker doesn't do that. The set of handled exceptions
is probably much smaller than handled. Almost every line of code can
throw ten different exceptions (at least my code). I'm not sure what
specifically the output you'd like to see would look like.


From goldnery at gmail.com  Sat May 10 13:39:40 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 10:39:40 -0700 (PDT)
Subject: list object
Message-ID: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>

my manual contain chapter about lists with python. when i try to copy
paste :

li = ["a", "b", "mpilgrim", "z", "example"] (1)


it i get this errore:

"TypeError: 'list' object is not callable"

i was wondering if their is  any special module I should import before
i use this function

i know i ask foolish questions it's my first day with python and i
have experience only with PHP and javascript, so please be patient

thanks


From bearophileHUGS at lycos.com  Sat May  3 14:59:59 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 3 May 2008 11:59:59 -0700 (PDT)
Subject: Light slices + COW
Message-ID: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>

Sometimes different languages suggests me ways to cross-pollinate
them.

(Note: probably someone has already suggested (and even implemented)
the following ideas, but I like to know why they aren't fit for
Python).



Python generators now allow me to package some code patterns common in
my code, that other (older) languages didn't allow me to extract; for
example given a sequence (array, list, etc) of items now and then I
need to scan all the upper triangle of their cross matrix:



def xpairs(seq):

    len_seq = len(seq)

    for i, e1 in enumerate(seq):

        for j in xrange(i+1, len_seq):

            yield e1, seq[j]



Or adjacent ones (there are ways to generalize the following function,
but this the most common situation for me):



def xpairwise(iterable):

    return izip(iterable, islice(iterable, 1, None))



That xpairs() generator is nice, but it's not the best possible code
(but you may disagree with me, and you may think that code better than
the successive D code that uses two slices). Inside it I can't use a
list slicing because it copies subparts of the list, probably becoming
too much slow (for example if len(seq) == 1000).



Compared to Python, the D language is at lower level, so you may
expect it to have a worse syntax (but the ShedSkin compiler has shown
me once for all that you can have a language that is both high-level,
with a short & sexy syntax, and very fast), but you can define a
xpairs() iterable class in it too, and the core of that iterable class
there's a method that may look like this:



if (this.seq.length > 1)

  foreach (i, e1; this.seq[0 .. $-1])

    foreach (e2; this.seq[i+1 .. $]) {

      result = dg(e1, e2); if (result) break; // yield

    }



Where the strange last line is the yield, and the $ inside [] is the
length of the current array (a very clever idea that avoids the need
for negative indexes).


That D code is as fast or faster than the code you can back-translate
from Python, this is possible because in D arrays slices are very
light, they are a struct of <length, pointer> (in the future they may
change to a couple of pointers, to speed up the array slice scanning).
So if you slice an array you don't copy its contents, just the start-
end points of the slice. If you read/scan the slice that's all you
have, while if you write on it, D uses a Copy-On-Write strategy, that
is a just-in-time copy of the slice contents.

In practice this speeds up lot of code that manages strings and arrays
(like a XML parser, making it among the faster ones).


Being the slice a struct, it's stack allocated, so the inner foreach
doesn't even create a slice object in the heap each time the outer
foreach loops.


One problem with this strategy is that if you have a huge string, and
you keep only a little slice of it, the D garbage collector will keep
it all in memory. To avoid that problem you have to duplicate the
slice manually:



somestring[inf...sup].dup;



I think Psyco in some situations is able to manage string slices
avoiding the copy.



I think Python 3.0 too may enjoy a similar strategy of light slices +
COW for strings, lists and arrays (tuples and strings don't need the
COW).



Bye,

bearophile


From mail at timgolden.me.uk  Sun May 25 14:33:43 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 25 May 2008 19:33:43 +0100
Subject: UTF problem?
In-Reply-To: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
Message-ID: <4839B107.9010700@timgolden.me.uk>

Vesa-Matti Sarenius wrote:
> I am trying to set up Linux printing via Windows XP and using this HOWTO:
> 
> http://justin.yackoski.name/winp/
> 
> I have one problem. When I send a file via CUPS to the windows spool
> directory dirwatch.py (http://justin.yackoski.name/winp/dirwatch.txt) dies
> and gives:
> 
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0'
> in position 77: ordinal not in range (128)
> 
> I think that this has something to do with UTF-8 what I do not know is how
> to get over it? 
> 
> So could someone please help me to get dirwatch.py script to understand my
> filenames (which, btw, do not have any non-ascii symbols, and will work
> if I manually copy-rename them).

Well you don't say what line it's dying on, but I would guess
it's the line which says "print full_filename" (altho' it
could be when it prints the output from gsprint.exe). In
any case, \xa0 is a non-breaking space:

<code>
import unicodedata

print unicodedata.name (u"\xa0")
</code>

so it's just possible that one of your filenames has
a non-ascii char in it without your noticing? (Altho'
I'd find that an odd character to include in a filename).

ReadDirectoryChangesW is the Unicode version of the
ReadDirectoryChanges API, so always returns Unicode objects
even if there are no non-ascii chars in the filenames.

To get round the problem in the immediate term, change
both print lines to something like:

print repr (full_filename)

This will show exactly what's in the filename. To do
the thing properly, you'll want to encode the filename
to something standard, eg, sys.stdout.encoding or just
"utf8":

print full_filename.encode ("utf8")

but since these are just info outputs I imagine you're
not too bothered how they look.

TJG


From Russ.Paielli at gmail.com  Mon May 26 00:49:05 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Sun, 25 May 2008 21:49:05 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>

On May 25, 2:32 pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
>
> > From whom are you trying to hide your attributes?
>
> I saw this "don't need it" pattern in discussions about the ternary
> "if..else" expression and about "except/finally on the same block
> level".
> Now Python has both. Actually it is very useful to be able to
> distinguish
> between inside and outside. This is obvious for real world things e.g.
> your
> TV. Nobody likes to open the rear cover to switch the channel. Similar
> arguments apply to software objects. "data hiding" is a harsh name, I
> would
> call it "telling what matters". The need for this becomes
> indispensable in
> really big software packages like the Eclipse framework with approx.
> 100000
> classes. If you cannot tell the difference between inside and outside
> you
> are lost.
>
> > In Python, the philosophy "we're all consenting adults here" applies.
>
> Please don't sell a missing feature as a philosophy. Say you don't
> need/want
> it. But don't call it philosophy.
>
> > You shouldn't pretend to know, at the time you write it, all the uses
> > to which your code will be put.
>
> It's *your* *decision* which uses will be available. Your explanation
> appears
> to me as a fear to decide.
>
> > If you want the users of your code to know that an attribute should
> > not be used as a public API for the code, use the convention of naming
> > the attribute with a single leading underscore.
>
> Littering your class definition with dozens of underscores is exactly
> the
> line noise we love to criticize in Perl.
>
> > > Python advertises himself as a full OOP language, but why does it
> > > miss one of the basic principles of OOP?
>
> > Who taught you that enforced restrictions on attribute access was a
> > "basic principle" of OO?
>
> Nearly every introduction to OOP? Please don't tell me that
> encapsulation
> does not mean "enforced restriction". If the language has no syntactic
> support for encapsulation then it does not have encapsulation. Similar
> argument applies to Java where programmers sometimes claim that Java
> "has"
> properties because of setCrap/getCrap.
>
> __
> Joe


Dear Mr. Cool,

Excellent post. I agree with you entirely.

I've always considered the underscore conventions in Python an ugly
hack in an otherwise elegant language. I often avoid them even when
they technically belong just because I don't like the way they make my
code look.

Your analogy of the TV set is nice. The front control panel should be
clearely distinguished from the covered control panel and certainly
from the guts. It's more than just a matter of keeping the user from
doing something stupid -- it's a matter of design style.

I am also bothered a bit by the seeming inconsistency of the rules for
the single underscore. When used at file scope, they make the variable
or function invisible outside the module, but when used at class
scope, the "underscored" variables or functions are still fully
visible. For those who claim that the client should be left to decide
what to use, why is the client prohibited from using underscored
variables at file scope?

I may be full of beans here, but I would like to make a suggestion.
Why not add a keyword such as "private," and let it be the equivalent
of "protected" in C++? That would make member variables and functions
visible in inherited classes. The encapsulation wouldn't be as
airtight as "private" in C++, so clients could still get access if
they really need it in a pinch, but they would know they are bending
the rules slightly. I realize that single underscores do that already,
but they are just unsightly.


From pball.benetech at gmail.com  Mon May 26 21:12:18 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Mon, 26 May 2008 18:12:18 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
	<98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>
Message-ID: <c73fb79b-a946-4b2c-9d37-ffda735a8541@z24g2000prf.googlegroups.com>

Partial solution: the complements idea sparked a slightly new
direction. S is defined as above (all sets except s0, the target).

fset = frozenset
s0 = fset([1])
s1 = fset([1,2])
s2 = fset([2])
s3 = fset([2,3,4])
s4 = fset([3])
s5 = fset([1,2,3,4,5])
s6 = fset([5])
s7 = fset([2,3,4,5])
S = set([s1,s2,s3,s4,s5,s6,s7])

# solutions for s0:
# s1 - s2
# s5 - s7
# s5 - s3 - s6

def find_complement(S, s0):
    for s in set(s for s in S if s & s0):
        symm_diff = s ^ s0
        if symm_diff in S:
            yield s0, s, symm_diff

for c in find_complement(S, s0):
    print c

(frozenset([1]), frozenset([1, 2]), frozenset([2]))
(frozenset([1]), frozenset([1, 2, 3, 4, 5]), frozenset([2, 3, 4, 5]))

So this algorithm can find partitions with 2 parts. It's helpless for
more complicated relationships -- in this case the combination s0 = s5-
s3-s6. Some kludgy ideas occur to me, and I'll work on them now. All
ideas welcome -- PB.




From deets at nospam.web.de  Sun May 18 11:05:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 17:05:44 +0200
Subject: waiting on an event blocks all signals
In-Reply-To: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
Message-ID: <69auuoF2uob0sU1@mid.uni-berlin.de>

alan schrieb:
> This ignores CTRL-C on every platform I've tested:
> 
> python -c "import threading; threading.Event().wait()"
> ^C^C^C^C
> 
> It looks to me like all signals are masked before entering wait(). Can
> someone familiar with the internals explain and/or justify this
> behavior? Thanks,

They aren't masked. Read the docs:

# Although Python signal handlers are called asynchronously as far as 
the Python user is concerned, they can only occur between the ``atomic'' 
instructions of the Python interpreter. This means that signals arriving 
during long calculations implemented purely in C (such as regular 
expression matches on large bodies of text) may be delayed for an 
arbitrary amount of time.


(http://docs.python.org/lib/module-signal.html)

Which is what is happening here - wait is implemented in C. So the 
arriving signal is stored flagged in the interpreter so that the next 
bytecode would be the signal-handler set - but the interpreter still 
waits for the blocked call.

Diez


From byte8bits at gmail.com  Thu May 22 17:29:10 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 22 May 2008 17:29:10 -0400
Subject: Shell-independent *nix setup script
In-Reply-To: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
References: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
Message-ID: <g14ojr$mb$1@solaris.cc.vt.edu>

scott.hafeman at rogers.com wrote:
> Hi,
> Is it worthwhile maintaining a production application setup script in
> Python as opposed to shell-script?  

I do not think so. Perhaps 'in conjunction with', but not 'opposed 
to'... sh is the lowest common denominator of shells. Script for sh and 
your script will run on most any Unix. Python is gaining acceptance, but 
is still not present everywhere by default... Solaris for example.


From tjreedy at udel.edu  Fri May  2 18:28:53 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 2 May 2008 18:28:53 -0400
Subject: Why is None <= 0
References: <fut7q3$kup$1@newsreader2.utanet.at><481226f9$0$20866$9b622d9e@news.freenet.de>
	<slrng14t4k.vg2.jon+usenet@snowy.squish.net>
	<769285d3-d774-4690-9062-d03c8fb1a93f@24g2000hsh.googlegroups.com>
Message-ID: <fvg4j5$3gc$1@ger.gmane.org>


"Aaron Watters" <aaron.watters at gmail.com> wrote in message 
news:769285d3-d774-4690-9062-d03c8fb1a93f at 24g2000hsh.googlegroups.com...
|What's up with Tim Peters anyway?  I haven't seen much from him for a 
while.

I miss him too ;-)
He occasionally responds to tracker or pydev math issues where his unique 
knowledge and experience is really needed.  (As recently as last Jan).
That is all I know.
tjr





From mail at timgolden.me.uk  Tue May  6 04:21:32 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 09:21:32 +0100
Subject: listing computer hard drives with python
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
Message-ID: <4820150C.3080906@timgolden.me.uk>

Ohad Frand wrote:
> I am looking for a way to get a list of all active logical hard drives
> of the computer (["c:","d:"..])

You can do this with WMI [*] under Windows:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_LogicalDisk ():
 print i.Caption

</code>

If you want only fixed disks (ie exluding external drives,
USB and CD drives etc) then specify DriveType=3:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_LogicalDisk (DriveType=3):
 print i.Caption

</code>

[*] http://timgolden.me.uk/python/wmi.html

TJG



From grflanagan at gmail.com  Wed May 28 08:11:55 2008
From: grflanagan at gmail.com (Gerard Flanagan)
Date: Wed, 28 May 2008 05:11:55 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
Message-ID: <6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>

On May 28, 1:48 pm, afrobeard <afrobe... at gmail.com> wrote:
> The following following code fails with the failiure:-
>
> File "test.py", line 27, in __main__.sanitize_number
> Failed example:
>     sanitize_number('0321-4683113')
> Expected:
>     '03214683113'
> Got:
>     '03214683113'
>
> Expected and Got looks the same. The value should verify.  What am I
> doing wrong here ?
>
> Thanks in advance. I really appreciate your time.
>
> P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
> Windows XP

Your code works for me (Python 2.5 WinXP).

Are you mixing tabs and spaces?

G.



From benjamin.kaplan at case.edu  Sun May 25 08:34:02 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sun, 25 May 2008 08:34:02 -0400
Subject: which datastructure for fast sorted insert?
In-Reply-To: <6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
Message-ID: <ec96e1390805250534j2f6b8d57k7a341d3aadced2cf@mail.gmail.com>

On Sun, May 25, 2008 at 3:10 AM, <notnorwegian at yahoo.se> wrote:

>
> > >>> l=list(s)
> > >>> l.sort()
> > >>> l
> >
> > ['a', 'b', 'c']
> >
> > hth,
> > Rares
>
> sets dont seem to be so good because there is no way to iterate them.
>
> s.pop()                 remove and return an arbitrary element from s;
> raises
> KeyError if empty
>
> i dont want to remove i just want to get the string that is stored
> there.


The only requirement for iterating through something is that it defines an
__iter__ method, which set does. This means you can use iter(a_set) to get
your iterator, or just use "for i in a_set" to iterate automatically.
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From Inyeol.Lee at gmail.com  Thu May 29 04:43:02 2008
From: Inyeol.Lee at gmail.com (Inyeol.Lee at gmail.com)
Date: Thu, 29 May 2008 01:43:02 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
References: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>
Message-ID: <d55abb23-1f0f-4724-8feb-4f68f0857711@z16g2000prn.googlegroups.com>

On May 29, 9:26 am, ?? <takau... at gmail.com> wrote:
> Hi everyone,
>
>  I am developing the console which has the embedded Python interactive
> interpreter. So, I want to judge whether current command is complete
> or not. Below is good example to solve this problem.
> //
> //http://effbot.org/pyfaq/how-do-i-tell-incomplete-input-from-invalid-i...
> //
> int testcomplete(char *code)
>   /* code should end in \n */
>   /* return -1 for error, 0 for incomplete, 1 for complete */
> {
>   node *n;
>   perrdetail e;
>
>   n = PyParser_ParseString(code, &_PyParser_Grammar,
>                            Py_file_input, &e);
>   if (n == NULL) {
>     if (e.error == E_EOF)
>       return 0;
>     return -1;
>   }
>
>   PyNode_Free(n);
>   return 1;
>
> }
>
>  But, I think this code has a problem. For example, when argument
> 'code' has below python command,
>
> if x % 2:
>    print "odd"
>
> at the current situation, this function returns COMPLETE!
> But, I think that sometimes users want to type "else" statement. So, I
> expected to get INCOMPLETE from this function, but I didn't.
>
> How should I do it?
>
> Thanks,
> urai

I guess you should use "Py_single_input" instead of "Py_file_input" in
your code, which requires extra NEWLINE to end complex statement.
Plz check details in Grammar/Grammar from python source distribution

--Inyeol


From danb_83 at yahoo.com  Thu May 22 00:42:08 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Wed, 21 May 2008 21:42:08 -0700 (PDT)
Subject: related to python
References: <mailman.1461.1211424054.12834.python-list@python.org>
Message-ID: <eccb9a17-8d96-41f1-bbd7-dae2431c813c@79g2000hsk.googlegroups.com>

On May 21, 9:34?pm, "salil_reeves" <salil_ree... at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');
> 2. stripping away any leading and trailing blank spaces; and
> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.
> how it is done ??
> can anyone help me with it



From ivan.illarionov at gmail.com  Thu May  1 16:26:35 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 20:26:35 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
Message-ID: <fvd91r$1g2$1@news.mtu.ru>

On Thu, 01 May 2008 14:13:08 -0500, Jon Ribbens wrote:

> On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>> I used XML files before for this purpose and found YAML much easier and
>> better suitable for the task.
>>
>> Please explain why don't like YANL so much?
> 
> Because even the examples in the spec itself are unreadable gibberish.
> The PyYAML library is over 300kB! These are rather big clues that it's
> unsuitable for the purpose for which it was designed. It's certainly
> unsuitable for use as a configuration file format, where it is overkill
> by several orders of magnitude.
> 
>   !!str &a1 "foo":
>   !!str bar
>   &a2 baz : *a1
>   !<tag:yaml.org,2002:str> foo :
>   !<!bar> baz
> 
> This is supposed to be human readable?

Thanx, now I see your point. I didn't mean all the fancy features of 
YAML, but the most basic sintax.

Compare this:
    <user id="babooey" on="cpu1">
        <firstname>Bob</firstname>
        <lastname>Abooey</lastname>
        <department>adv</department>
        <cell>555-1212</cell>
        <address password="xxxx">ahunter at example1.com</address>
        <address password="xxxx">babooey at example2.com</address>
    </user>

and this:
        babooey:
            computer : cpu1
            firstname: Bob
            lastname: Abooey
            cell: 555-1212
            addresses:
                - address: babooey at example1.com
                  password: xxxx
                - address: babooey at example2.com
                  password: xxxx

I find the latter *much* more readable.

And the most important thing is that it *maps directly to Python data 
types*, in this case dictionaries and lists:
{babooey: {computer: cpu1, firstname: Bob, lastname: Abooey, cell: 555, 
1212, addresses: [{address: babooey at example1.com, password: xxxx},
{address: babooey at example2.com, password: xxxx}]}

I took the example from 
http://www.kuro5hin.org/story/2004/10/29/14225/062
I haven't use my own example only because I don't have one at hand right 
now. YAML, in its simple form, definetely makes me more productive. I 
wasted too much time with XML in the past and I won't ever use it as a 
serialization or config/settings format again. .INI/ConfigParser is too 
limited and has no standards. I just don't see anything better than YAML 
to do human and Python editable config files and to serialize information 
for later use.

>> PS. Your reply remind me of early days of Python when Perl programmers
>> said exacly the same thing about Python.
> 
> I think I would suffer irony overload if I saw a Perl programmer
> criticising Python for being hard to read ;-)


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:29:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:29:13 -0300
Subject: Help with pyserial and sending binary data?
References: <721268.64699.qm@web52409.mail.re2.yahoo.com>
Message-ID: <op.uajpyzppx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 16:50:46 -0300, Rich <richietommy at yahoo.com> escribi?:

> I am working on a python library for sending and receiving data from a  
> Subaru's ECU (the fuel injection computer) via the OBD-II port and an  
> OBD to USB cable, with the Subaru Select Monitor protocol. There are a  
> #--------------------------
> import serial, string
> output = " "
> ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
> ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
> while output != "":
>    output = ser.read()
>    print hex(ord(output))
> #--------------------------
>
> The only problem is that when I send the ECU init command, it just echos  
> back the data I sent it, which, from my understanding, means that I sent  
> an invalid request packet.[...]
> My best guess I have heard is that chr() isn't encoding the hex value  
> properly to a byte value the ECU understands (wrong endianness?), or  
> chr() encoding isn't always representing hex as an 8-bit byte. chr()  
> should always encode to an 8-bit byte (not 7-bit ASCII or anything,  
> correct)? Is there any way to switch byte endianness, or ensure I am  
> encoding 8-bit bytes? Any help is much appreciated. Thanks!

No, chr works as it should. The same thing can be written as  
ser.write("\x80\x10\xF0\x01\xBF\x40")
Are you sure you're talking to the right device, /dev/ttyUSB0? Are the  
comm parameters correct?
(BTW, if you get more than a single character per loop, the print  
statement will fail - try with ser.read(1))

-- 
Gabriel Genellina



From pball.benetech at gmail.com  Sun May 25 15:51:14 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 12:51:14 -0700 (PDT)
Subject: set partition question
Message-ID: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>

dear pythonistas,

So imagine that we have a set of sets S. If we pick arbitrarily one
set, s0, what are all the combinations of other sets in S which when
combined by set operations result in s0?

s0 = set([1])
s1 = set([1,2])
s2 = set([2])
S = set([s0,s1,s2])
one answer we're searching for is s0 = s1 - s2

There may be arbitrarily many set elements (denoted by integers
1,2,3,...) and arbitrarily many combinations of the elements composing
the sets s_i (s0, s1, ...). We can use any operation or function which
takes and returns sets.

I think this problem is related to integer partitioning, but it's not
quite the same. The range of answers has a little combinatorial
explosion problem as S gains new members. In my problem, len(S) is
usually on the order of 1M, and in the worst case, 10M, and there are
on the order of 10k elements.

My attempts to come up with an algorithm have not succeeded. Any ideas
occur to you folks? -- PB.

--
Patrick Ball, Ph.D.
Chief Scientist
   & Director, Human Rights Program
http://www.benetech.org
http://www.hrdag.org
http://www.martus.org



From deets at nospam.web.de  Thu May 29 04:04:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 10:04:15 +0200
Subject: pydb remote debugging/cmd.Cmd over socket?
In-Reply-To: <wihwsldztl4.fsf@panix5.panix.com>
References: <6a5b8qF35n4hiU1@mid.uni-berlin.de>
	<wihwsldztl4.fsf@panix5.panix.com>
Message-ID: <6a76c6F34bs9qU1@mid.uni-berlin.de>

> As part of the 2006 Google Summer of Code project Matt Flemming
> started working on remote debugging in pydb. Alas it wasn't completed
> and I let the code fall through the cracks. 
> 
> Matt claimed it worked to some degree but I could never get it to work
> for me. Most definitely the code has atrophied.
> 
> The user interface was loosely based or reminiscent of gdb. So
> you'd run pydbserver either as a command inside the debugger or as an
> option to pydb or call inside Python pdbserver after importing. 
> 
> There is a connection class (file pydb/connection.rb) which was to
> allow different kinds of protocols, like a socket connection or 
> a serial line connection, or maybe even two FIFO's so that you could
> connect to a different process on the same computer.
> 
> And there were some commands on the user-interaction side
> to attach or detach the Python program you want to debug.
> 
> If you look in pydb.py.in and gdb.py.in you'll see some code commented
> out with double hashes which is part of this effort.
> 
> I invite you or others to try to resurrect this effort. However as I
> look at the code now, it doesn't make much sense other than the broad
> outline given above.

Hm. Ok, I'll look into that. It's just that I don't get cmd.Cmd to work 
against two streams. Maybe I need to dive into unix-coding a bit deeper 
again.

> Another approach and possibly a much simpler one if you are looking
> for a Python debugger which supports remote debugging is Winpdb
> http://winpdb.org/ by Nir Aides.


I've found that - and while it's nice, it has one problem: I can only 
start it with winpdb governing the process already, preventing python 
from starting.

In contrast, the possibility to use a sginal to start the debugger of 
pydb is great, so that's the reason I want to stick with it.

Diez


From rhamph at gmail.com  Mon May  5 12:53:31 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 5 May 2008 09:53:31 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
Message-ID: <e61e611f-a01b-4c57-bffa-bc7182cd82b1@h1g2000prh.googlegroups.com>

On May 3, 4:31 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> > On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>
> > > Arnaud Delobelle wrote:
>
> > >> sum() works for any sequence of objects with an __add__ method, not
> > >> just floats!  Your algorithm is specific to floats.
>
> > > This occurred to me also, but then I tried
>
> > > sum(['abc', 'efg'], '')
>
> > Interesting, I always thought that sum is like shortcut of
> > reduce(operator.add, ...), but I was mistaken.
>
> > reduce() is more forgiving:
> > reduce(operator.add, ['abc', 'efg'], '' ) # it works
> > 'abcefg'
>
> Hm, it works for lists:
> sum(([1], [2]), [])
> [1, 2]
>
> However I find the seccond argument hack ugly.
> Does the sum way have any performance advantages over the reduce way?

The relative differences are irrelevant.  The important thing is they
both perform quadratically, which makes them the wrong choice (unless
you can guarantee your inputs are trivial.)

$ python2.5 -m timeit 'x = [[0]*1000]*10' 'sum(x, [])'
1000 loops, best of 3: 566 usec per loop
$ python2.5 -m timeit 'x = [[0]*1000]*100' 'sum(x, [])'
10 loops, best of 3: 106 msec per loop
$ python2.5 -m timeit 'x = [[0]*1000]*1000' 'sum(x, [])'
10 loops, best of 3: 18.1 sec per loop

Per element of the outer list, that's 0.0566, 1.06, 18.1 msec.
Nasty.  Use this instead:

$ python2.5 -m timeit -s 'x = [[0]*1000]*10' 'y = []' 'for a in x:
y.extend(a)'
10000 loops, best of 3: 80.2 usec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*100' 'y = []' 'for a in x:
y.extend(a)'
1000 loops, best of 3: 821 usec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*1000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 24.3 msec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*10000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 241 msec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*100000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 2.35 sec per loop

Per element of the outer list t hat's 0.00802, 0.00821, 0.0243,
0.0241, 0.0235 msec.  At 1000 elements it seemed to cross some
threshold (maybe cache related, maybe allocation related), but overall
it scales linearly.  Know your algorithm's complexity.


From g.kokosinski at gmail.com  Mon May 26 08:26:15 2008
From: g.kokosinski at gmail.com (=?ISO-8859-2?Q?Grzegorz_Kokosi=F1ski?=)
Date: Mon, 26 May 2008 14:26:15 +0200
Subject: Signal handler doesn`t handle any signals while main thread is blocked
Message-ID: <e761e0d90805260526l38f8b01ep43085884679bd962@mail.gmail.com>

Hi!
I waste a lot of my time figuring why this snip of code doesn`t work.
And still without any solution ;/
Does anybody know why this handler cannot handle SIGINT signal? What
did I wrong?

Thanks in advance.

#
# CODE
#
import signal
from threading import *

def siginthandler(signum, frame):
     global work,cv
     print 'terminating...'
     cv.acquire()
     work = 0
     cv.notifyAll ()
     cv.release()

work = 1
signal.signal (signal.SIGINT, siginthandler)

print 'wait for SIGINT signal'
cv = Condition ()
cv.acquire()
while work:
    print 'waiting...'
    cv.wait()
print 'woke up'
cv.release()

print 'terminated'


From a.schmolck at gmail.com  Sat May  3 19:10:33 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Sun, 04 May 2008 00:10:33 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
Message-ID: <yfswsmbf0gm.fsf@gmail.com>

AlFire <spamgrinder.trylater at ggmail.com> writes:

>> The threading module already has a function to return the number of Thread
>> objects currently alive.
>
> I have threads within threads - so it does not suit me :-(.

How about using a scalar numpy array? They are mutable, so I assume that x +=
1 should be atomic.

'as


From nick at craig-wood.com  Wed May 28 11:30:18 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 28 May 2008 10:30:18 -0500
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
Message-ID: <slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>

Matt <mr.edel at gmx.at> wrote:
>  Okay so well, I have quite a problem right now with a file stream. What 
>  I am doing is to use the Cannon SDK dlls to get control over my old 
>  Cannon A60 Camera for some surveillance useage.
> 
>  By using ctypes it all worked well until now. I am able to load the 
>  dlls, use a lot of functions, am able to connect to the camera, read out 
>  some params, send commands etc... but now I am stuck with reading the 
>  picture data.
> 
>  In C the code looks as follows (found in an supplemental *.h SDK file:
[snip]
>  So, since I'm no C-Professional, I can only guess what that code does. 
>  With some previous commands I tell the camera to make a picture. This 
>  picture is then automatically moved to the PCs RAM and with the function 
>  above (CDGetReleasedData) I should be able to access this stream. Now I 
>  havn't accessed any stream with ctypes yet so I have only a rough idea 
>  how it could work.
> 
>  The following are the relevant parts of my code that don't work:
> 
> 
>  # Definitions:
> 
>  class cdReleaseImageInfo(Structure):
>       _fields_ = [("SequenceID", c_uint),
>                        ("DataType", c_uint),
>                        ("Format", c_ubyte),
>                        ("DataSize", c_uint),
>                        ("Filename", c_char * 2)]
> 
> 
>  class cdStream(Structure):
>       _fields_ = [("contextH", c_uint),
>                        ("open", c_uint),
>                        ("close", c_uint),
>                        ("read", c_uint),
>                        ("write", c_uint),
>                        ("seek", c_uint),
>                        ("tell", c_uint)]

These c_uints would be better as c_void_p at minimum

Howerver I suspect you are going to have to implement these callback
functions - read this section of the manual

  http://docs.python.org/lib/ctypes-callback-functions.html

I suspect it will call back your functions for the given
functionality, eg "open", "close" etc...

>  class memunion(Union):
>       _fields_ = [("lpszFileName", c_char),

This should be c_char_p I suspect...

>                        ("pStream", cdStream)]

and this should be POINTER(cdStream)

>  class cdStgMedium(Structure):
>       _fields_ = [("Type", c_uint),
>                        ("u", memunion)]
> 
> 
> 
> 
>  # command:
> 
>  datainfo = cdReleaseImageInfo()
>  data = cdStgMedium()
>  errorcode = cdsdk.CDGetReleasedData(devicehandle, byref(cbfunct), 
>  c_uint(1), c_uint(1), byref(datainfo), byref(data))
> 
>  The function "cdsdk.CDGetReleasedData" itself gets executed correctly, 
>  but returns an "Invalid Parameter" errorcode. there's also no useful 
>  data whereas datainfo gets written correctly. I know that my cdStream 
>  can't work, facing the C-code, but what'd be the right cdStream class? 
>  What can I do? Any ideas?

I've noted some obvious problems above.

To get this to work will require some C knowledge.  If they supply
some example C code I'd work through that translating it line by line
to python+ctypes.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From castironpi at gmail.com  Thu May 15 22:31:35 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:31:35 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
	<24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>
Message-ID: <325be043-d911-4cce-9c3b-56209033cd68@d45g2000hsc.googlegroups.com>

On May 15, 6:49?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>
>
>
>
>
> > On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > > work:
>
> > > > > > > from mutagen.mp3 import MP3
> > > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > > [snip]
> > > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > > contents.
>
> > > > > cool, so how do i give it the path, if not in the form of a URL
> > > > > string? ?maybe this is obvious...
> > > > > --
> > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > It doesn't look like you can, with mutagen. So, time to find a different
> > > > library that supports arbitrary file objects instead of only file paths.
> > > > I'd suggest starting here:
> > > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > > Possibly one with actual documentation, since that would also be a step
> > > > up from mutagen.
>
> > > After a bit of time looking around, looks like nearly all the python id3
> > > modules expect to work with filenames, instead of file objects.
>
> > > I can't vouch for it, and the documentation still looks sparse, but this
> > > module at least looks capable of accepting a file object:
> > >http://pypi.python.org/pypi/tagpy
>
> > > Looks like it'd be a challenge to build if you're on windows, since it
> > > depends on an external library.
>
> > > Alternately, you could probably create a subclass of the mutagen stuff
> > > that used an existing file object instead of opening a new one. No idea
> > > what that might break, but seems like it would be worth a try.
>
> > > As last ditch option, could write the first few kb of the file out to a
> > > temp file and see if mutagen will load the partial file.
>
> > Okay, now I'm officially spending too much time looking through this
> > stuff.
>
> > However, looks like the "load" method of the MP3 class is what you'd
> > want to override to change mutagen's file loading behavior. Probably
> > pass the URL as the filename, and take a cut & paste version of the
> > default load method from ID3FileType and change it to use urllib2 to
> > open it instead of a local file open.
>
> > Might work. Might not. No warranty express or implied.
> > --
> > John Krukoff <jkruk... at ltgc.com>
> > Land Title Guarantee Company- Hide quoted text -
>
> > - Show quoted text -
>
> I'm supposed to question "time.toomuch.spend". ?NAMERS!- Hide quoted text -
>
> - Show quoted text -

Is there a way 'time.toomuch.spend' can be scanned for in code?  If
not, let's play!


From gagsl-py2 at yahoo.com.ar  Sun May 25 00:38:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 01:38:59 -0300
Subject: How to print a sorted list as a multi-column table
References: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>
	<0ab498fa-7983-4ea0-abcf-cf7f827bd05e@x35g2000hsb.googlegroups.com>
Message-ID: <op.ubo0i9qrx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 15:03:16 -0300, Mensanator <mensanator at aol.com> escribi?:
> On May 23, 10:30?am, Sverker Nilsson <s... at sncs.se> wrote:

>> Why are tables formatted like the following, when sorted? (Both in
>> linux eg ls, ftp help, and in Python help() when listing (eg)
>> modules))
>>
>> (1)
>>
>> a ?g ?m ?s
>> b ?h ?n ?t
>> c ?i ?o ?u
>> d ?j ?p ?v
>> e ?k ?q
>> f ?l ?r
>
> Because it's easier to read when the items have more
> than one letter. Have a look at a dictionary.

I agree with the OP. Dictionaries have two or more columns, but they span several *small* pages. The index above asumes an infinite page height, like a dictionary with all pages joined together making a single giant page. If dictionaries were sorted like the index above, "Python" could appear in the first page, and "Django" in the last one...

>> In a pager, if you want to limit the number of lines output at a time,
>> then yo'd see with (1) (if artifically limiting output to 2 lines):
>>
>> a ?g ?m ?s
>> b ?h ?n ?t
>>
>> So to see the f item you would have to scroll down all the way. ?The
>> number of times you would have to scroll down is in completely
>> unrelated to the item's position in sort order. That seems to defeat
>> the purpose of sorting in the first place. It feels strange, to me at
>> least. Anybody had the same feeling?
>
> No.

I do!

>> Well, what's the rationale (if any) for using the layout (1)?
>> Wouldn't layout (2) be better? And/or would it be confusing /
>> non-pythonic / non-unlixonic if a program used the (2) layout instead?
> The obvious solution is to do both, like the DOS directory
> command:

I'd use layout (1) *but* on a single page at a time. The layout you see on real dictionaries, or printed books.

-- 
Gabriel Genellina



From notontheweb at noisp.com  Wed May  7 20:22:13 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 00:22:13 GMT
Subject: web client in Python Q
Message-ID: <VIrUj.662659$us.202429@fe04.news.easynews.com>

Hey folks.  I know approximately zero about web clients.  There's a 
simple task I want to do. (I think it's probably simple.) And I figure a 
Python script ought to be just the ticket.

Various web services for daily stock ticker info.  For example,

http://finance.google.com/finance/historical?q=NYSE:APC&output=csv

and

http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv

Those will serve up data for the stock APC.  But the problem is, a 
file-selection dialog pops up.  I would like to have a program that 
would supply a file name and download the data automatically, without 
human or mouse intervention.  Is that clear?

Can someone point me in the right direction?

Thankee.


From mnordhoff at mattnordhoff.com  Wed May 28 04:47:03 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Wed, 28 May 2008 08:47:03 +0000
Subject: Does this path exist?
In-Reply-To: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
Message-ID: <483D1C07.3070202@mattnordhoff.com>

s0suk3 at gmail.com wrote:
> I wanted to ask for ways to test whether a path exists. I usually use
> os.path.exists(), which does a stat call on the path and returns True
> if it succeeds, or False if it fails (catches os.error). But stat
> calls don't fail only when a path doesn't exist. I see that, at least
> on Windows, the instance of the exception has an attribute 'errno' set
> to 2 when it fails because the path doesn't exist. Is it a portable
> solution to rely on this (haven't tried it on Linux)? Are there other
> ways of testing whether a path exists?
> 
> Thanks,
> Sebastian

"import errno" and see if the exception's errno attribute is set to
errno.ENOENT (which is, yes, 2). It is portable.

If you Google [ENOENT Windows] or whatever, there are some differences
on different platforms, but not many.
-- 


From castironpi at gmail.com  Thu May 15 19:23:03 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:23:03 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
Message-ID: <8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>

On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
> The following proposed solution is not intended to be a solution, it
> goes completely against the zen of python. [Type import this into the
> python command interpreter]
>
> I brought it down to two lines:-
>
> l = range(6)
> [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> itertools would still be a better approach in my opinion.
>
> Just because I'm curious to know, can anyone bring it shorter[even if
> its cryptic] than this without invoking any Python Library.
>
> P.S. Once again I would not recommend using this as Explicit is better
> than Implicit
> P.P.S. It is strongly undesirable for us humans to use anything
> starting with __ :)
>
> On May 15, 5:10?pm, "Geoffrey Clements"
>
>
>
> <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > | It seems that I rather frequently need a list or iterator of the form
> > > | [x for x in <> while <>]
>
> > > I can think of two ways to interpret that.
> > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > >> the expression <B> is false.
>
> > def gen(a):
> > ? ? for x in a:
> > ? ? ? ? if B: break
> > ? ? ? ? yield x
>
> > a_gen = gen(A)
>
> > # now iterate over a_gen
>
> > --
> > Geoff- Hide quoted text -
>
> - Show quoted text -

In your original, you have:

> l = range(6)
> [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]

You may be hyperextending the use of '..if..else..', which is one of
my fears regarding 'with x as y'.  "l.__delslice__(0,len(l))" is not
an expression.


From frederic.degraeve at gmail.com  Wed May 21 06:12:52 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Wed, 21 May 2008 03:12:52 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <bac13dbd-fac5-44e0-9470-17c2b6bc3b16@c65g2000hsa.googlegroups.com>


> By the way, is it possible (and easy) to call a C function from a
> Python program??

Use SWIG. It's easy, smart and beautiful. After that, you can call C/C+
+ from a lot of scripting languages such as python, R, etc
A lot of open sources projects already use it.

http://www.swig.org/tutorial.html

Boost.Python is also very known (but never tested by myself).

Fr?d?ric


From charleshixsn at earthlink.net  Thu May 22 22:35:50 2008
From: charleshixsn at earthlink.net (Charles Hixson)
Date: Thu, 22 May 2008 19:35:50 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
Message-ID: <200805221935.50709.charleshixsn@earthlink.net>

On Thursday 22 May 2008 13:30:07 Nick Craig-Wood wrote:
> ...
> >From Armstrong's book: The expression Pattern = Expression causes
>
> Expression to be evaluated and the result matched against Pattern. The
> match either succeeds or fails. If the match succeeds any variables
> occurring in Pattern become bound.
>
> It is a very powerful idea and one which (along with the concurrency
> and message passing from Erlang) has been implemented for python :-
>
>   http://candygram.sourceforge.net/
>
> I've been reading the Erlang book and I have to say it has given me a
> lot of insight into python...

Although when comparing Candygram with Erlang it's worth noting that Candygram 
is bound to one processor, where Erlang can operate on multiple processors.  
(I'd been planning on using Candygram for a project at one point, but this 
made it unusable.)



From larry.bates at websafe.com`  Sat May 10 09:38:36 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Sat, 10 May 2008 08:38:36 -0500
Subject: firefox add-on to grab python code handily?
In-Reply-To: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>

CM wrote:
> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
> 
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
> 
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
> 
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?
> 
> 

Since most of us keep Idle or some other Python IDE open nearly 100% of the time 
we just copy from webpage, paste into new Python document, and run in the IDE. 
While you could clearly write a plug-in for FF to achieve this, IMHO I doubt 
many people would actually use it.

-Larry


From skanemupp at yahoo.se  Tue May 27 19:26:28 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 27 May 2008 16:26:28 -0700 (PDT)
Subject: maximum recursion depth?
Message-ID: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>

i  received an error maximum recursion depth when processing large
amounts of data.

i dont know exactly how many recursive calls i made but id assume
50000 or so.

is there a definitie limit to the nbr of calls or is the memory that
runs out? is that then the RAMmemory? is there a special amount of
memory assigned for python or it just takes and takes until windows
runs out of it?


From arnodel at googlemail.com  Wed May  7 14:09:08 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:09:08 +0100
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <m2od7i56m3.fsf@googlemail.com>

brad <byte8bits at gmail.com> writes:

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value
> pairs:
>
> {'001' : '01'}

-> refdict

>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}

-> multidict

>
> Pseudo Code:
> for key, value in first_dict.iteritems():
>   # How do I do the following line?
>   if key not in second_dict or if it is, but has has the wrong value,
> then let me know

I think it's best to iterate over items of the second dictionary
first.  I am assuming that a key can be repeated in the second
dictionary, otherwise it could be a bit simpler:

missing_keys = set(first_dict)
for keys, val in second_dict.iteritems():
    for key in keys:
        missing_keys.discard(key)
        if first_dict.get(key, val) != val:
            print "wrong value for", key, 'in', keys
if missing_keys:
    print 'some keys are missing:', ',',join(remaining) 

-- 
Arnaud


From kris at FreeBSD.org  Fri May 30 19:04:50 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Sat, 31 May 2008 01:04:50 +0200
Subject: UNIX credential passing
In-Reply-To: <g1p3np$pvf$01$1@news.t-online.com>
References: <mailman.1755.1212099902.12834.python-list@python.org>
	<g1p3np$pvf$01$1@news.t-online.com>
Message-ID: <48408812.30901@FreeBSD.org>

Sebastian 'lunar' Wiesner wrote:
> [ Kris Kennaway <kris at FreeBSD.org> ]
> 
>> I want to make use of UNIX credential passing on a local domain socket
>> to verify the identity of a user connecting to a privileged service.
>> However it looks like the socket module doesn't implement
>> sendmsg/recvmsg wrappers, and I can't find another module that does this
>> either.  Is there something I have missed?
> 
> http://pyside.blogspot.com/2007/07/unix-socket-credentials-with-python.html
> 
> Illustrates, how to use socket credentials without sendmsg/recvmsg and so
> without any need for patching.
> 
> 

Thanks to both you and Paul for your suggestions.  For the record, the 
URL above is linux-specific, but it put me on the right track.  Here is 
an equivalent FreeBSD implementation:

def getpeereid(sock):
     """ Get peer credentials on a UNIX domain socket.

         Returns a nested tuple: (uid, (gids)) """

     LOCAL_PEERCRED = 0x001
     NGROUPS = 16

#struct xucred {
#        u_int   cr_version;             /* structure layout version */
#        uid_t   cr_uid;                 /* effective user id */
#        short   cr_ngroups;             /* number of groups */
#        gid_t   cr_groups[NGROUPS];     /* groups */
#        void    *_cr_unused1;           /* compatibility with old ucred */
#};

     xucred_fmt = '2ih16iP'
     res = tuple(struct.unpack(xucred_fmt, sock.getsockopt(0, 
LOCAL_PEERCRED, struct.calcsize(xucred_fmt))))

     # Check this is the above version of the structure
     if res[0] != 0:
         raise OSError

     return (res[1], res[3:3+res[2]])


Kris


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed May  7 12:05:21 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 07 May 2008 18:05:21 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <68e2a1F2s43b2U1@mid.individual.net>

jmDesktop wrote:

> Studying OOP and noticed that Python does not have Interfaces. 

By "OOP", you mean "Java", right? 8)

> Is that correct?  Is my schooling for nought on these OOP concepts
> if I use Python.  Am I losing something if I don't use
> the "typical" oop constructs found in other languages (Java, C#
> come to mind.)  

AFAIK, Interfaces weren't "typical" before Java. CMIIW.

BTW, Zope has interfaces. Not sure if it's exactly the same.

Regards,


Bj?rn

-- 
BOFH excuse #424:

operation failed because: there is no message for this error (#1014)



From jgnmello at gmail.com  Sat May 31 01:12:01 2008
From: jgnmello at gmail.com (=?ISO-8859-1?Q?Jo=E3o_Mello?=)
Date: Sat, 31 May 2008 02:12:01 -0300
Subject: mod_python + apache at windows
Message-ID: <4af2c4970805302212s6903fdb1v817cf6395de9f085@mail.gmail.com>

Hi...
Ane one can give me an example to install mod_python in apache at windows?

Hug,
Mello.
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From deets at nospam.web.de  Tue May 13 16:16:52 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 22:16:52 +0200
Subject: built in list generator?
In-Reply-To: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
Message-ID: <68uba1F2ur7lkU1@mid.uni-berlin.de>

globalrev schrieb:
> if i want  a list with all numbers between x and y is there a way to
> do this with an inbult function.
> 
> i mean i can always construct a function to do this but is there
> soemthing like:
> 
> nbrs = list(range(50,100, 2))

range *does* that. use xrange if all you want is to iterate.

Diez


From darcy at druid.net  Tue May 13 13:32:51 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Tue, 13 May 2008 13:32:51 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
Message-ID: <20080513133251.2c2d9537.darcy@druid.net>

On Tue, 13 May 2008 19:57:10 +0300
"Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
> Not everybody has grown in English-speaking community, you know. And
> knowing math quite good, I prefer writing "x = y" instead of "Set x to
> y".

OMG!  It's COBOL.

Wasn't there an aborted attempt at writing a language based on English
back in the sixties or seventies?  I seem to recall that it failed
mainly because it turns out that programmers don't like to speak in
English, even when it is their first language, to describe computer
algorithms.  If that wasn't true then pseudocode would look a lot more
like English than it does.  In fact, pseudocode tends to look a lot
like Python.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From alitosis at gmail.com  Wed May  7 02:41:08 2008
From: alitosis at gmail.com (alito)
Date: Tue, 6 May 2008 23:41:08 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <0c999d92-e3e5-4f5c-b636-73739abd675a@1g2000prg.googlegroups.com>

On May 6, 7:19?pm, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
> ? TCP ? ?0.0.0.0:445 ? ? ? ? ? ?0.0.0.0:0 ? ? ? ? ? ? ?LISTENING
> ? UDP ? ?0.0.0.0:445 ? ? ? ? ? ?*:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
> ? TCP ? ?0.0.0.0:445 ? ? ? ? ? ?0.0.0.0:0 ? ? ? ? ? ? ?LISTENING
> ? UDP ? ?0.0.0.0:445 ? ? ? ? ? ?*:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find', ?'"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>
Get rid of the extra quotes.  ie:
p2 = Popen(['find',  '445'], stdin = p1.stdout, stdout = PIPE)

The quotes on the command line and on the os.system call are consumed
by the shell.  The program doesn't see them.


From goldnery at gmail.com  Thu May 29 18:41:29 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 15:41:29 -0700 (PDT)
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
Message-ID: <13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>

On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
> Gandalf wrote:
> > how do i write this code in order for python to understand it
> > and print me the x variable
>
> > x=1
> > def aaaa():
> >     x++
> >     if x > 1:
> >         print "wrong"
> >     else :
> >         print x
>
> > aaaa()
>
> Example:
>
> x=1
> def aaaa(x):
>     x += 1
>     if x > 1:
>         return "wrong"
>     else :
>        return x
>
> print aaaa(x)
>
> John

mmm isn't their any global variable for functions?


From http  Wed May 28 15:51:22 2008
From: http (Paul Rubin)
Date: 28 May 2008 12:51:22 -0700
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
Message-ID: <7xr6bm2on9.fsf@ruckus.brouhaha.com>

Jerry Stuckle <jstucklex at attglobal.net> writes:
> A good OO programmer could easily write good functional code.

Over on #haskell there's a general belief that learning Haskell is
easier for nonprogrammers than it is for OO programmers, since the OO
programmers first have to unlearn what they previously knew.


From bj_666 at gmx.net  Mon May 26 18:08:10 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 26 May 2008 22:08:10 GMT
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>
	<6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>
Message-ID: <6a0qmaF32hqrpU2@mid.uni-berlin.de>

On Mon, 26 May 2008 13:51:46 -0700, notnorwegian wrote:

> what im asking is can a highlevellanguage be written directly on top
> of the machine or a highlevellanguage is always written on top of a
> lowlevellanguage?

What do you mean by "directly on top of the machine"?  How do you want to
implement a language without using *another* language?  At the very lowest
level there's machine language.  And of course it is possible to implement
high level languages in machine language.  That's a lot of work and not
very portable of course.

Ciao,
	Marc 'BlackJack' Rintsch


From spamgrinder.trylater at ggmail.com  Thu May  1 10:56:45 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Thu, 01 May 2008 09:56:45 -0500
Subject: is +=1 thread safe
Message-ID: <4819DA2D.3030508@ggmail.com>

Hi,

I have a piece of software which uses threads in very massive way - like 
hundreds of  them generated every second.

there is also a piece of code which maintains the number of outstanding 
threads, simply

counter+=1 is executed when before starting the thread and counter-=1 
after it finishes.

all is very simple and by the end of the program life I expect the 
counter to zero out.

however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.

I guarded those statement with Lock.{acquire,release} and now it always 
returns 0.


But I still can not believe that +=1 is not a thread safe operation.


Any clue?

-- 

Andy


From gagsl-py2 at yahoo.com.ar  Mon May  5 18:44:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 19:44:30 -0300
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
	<65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>
Message-ID: <op.uapdggykx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 13:02:12 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>>
>> > i'm redirecting the stdout & stderr of my python program to a log.
>> > Tests i've done on a simple program with print statements, etc. work
>> > fine.  however, in my actual program i get weird output like this:
>>
>> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
>> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
>> > if any
>> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
>>
>> Try this simplified example and see by yourself:
>>
>> import sys
>>
>> class Write2Log:
>>      def write(self, x):
>>          sys.__stdout__.write('[%s]' % x)
>>
>> sys.stdout = Write2Log()
>>
>> print "Hello world!"
>> age = 27
>> name = "John"
>> print "My name is", name, "and I am", age, "years old."
>
> thanks Gabriel,
>    i tried the code you sent and got output like the following:
> [My name is][][john][][and I am][][27][][years old.]
>
> it doesn't really help me though.  does this have any advantages over
> the syntax i was using?
> are there any limits on what kind of objects the logger can write?  ie
> ascii strings of any length?

The example doesn't use any logger, so loggers aren't the problem here, ok?

The write function above puts square brackets [] around anything it receives. This way you can see exactly how write() is called: once per *item* in the print statement, plus once per comma used (with an space character that you didn't copy correctly).

Back to your original code, you have to call logger.debug with a *line* of text, but you are calling it with many small pieces - that's the problem. Accumulate output until you see a '\n' - then join all the pieces into a single, complete line and finally call logger.debug

-- 
Gabriel Genellina



From nagle at animats.com  Thu May  1 11:40:05 2008
From: nagle at animats.com (John Nagle)
Date: Thu, 01 May 2008 08:40:05 -0700
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <4819e15e$0$34539$742ec2ed@news.sonic.net>

AlFire wrote:
> Hi,
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
> 
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.
> 
> I guarded those statement with Lock.{acquire,release} and now it always 
> returns 0.
> 
> 
> But I still can not believe that +=1 is not a thread safe operation.
> 
> 
> Any clue?

    "counter += 1" is not an atomic operation, apparently.  Sorry.

    However, appending and removing from a list or dict are atomic operations,
because if they were not, memory allocation would break.

						John Nagle


From devphyl at gmail.com  Sun May 11 06:05:08 2008
From: devphyl at gmail.com (alefajnie)
Date: Sun, 11 May 2008 03:05:08 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
Message-ID: <7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>

>
> try arr[2][3] instead.
>
> basically your version is trying to index an array with a tuple argument (2,3).
>
> --irmen


oh, you're right.

btw, is any simple way to create multi-dimension array ?
any built-in function ?


From zapwireDASHgroups at yahoo.com  Tue May 27 16:46:28 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:46:28 -0700
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<m2wslf4haq.fsf@googlemail.com>
Message-ID: <Kq__j.177027$ng7.15947@en-nntp-05.dc1.easynews.com>

Hi Arnaud,

"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2wslf4haq.fsf at googlemail.com...
> That's because the class 'Exception' defines a descriptor 'args' which
> has to be a sequence.

Ah, thanks.  I was following the example in Beazley's book and should have dug 
into the actual documentation a bit more.

> OTOH you could just take advantage of Exception.args:
>>>> class MyError(Exception): pass

Sounds good to me.  I take it that, if I don't inherit from Exception, various 
expected behaviors will break?  (This is what Beazley suggests...)

---Joel




From pavel.uvarov at gmail.com  Fri May 30 16:40:13 2008
From: pavel.uvarov at gmail.com (pavel.uvarov at gmail.com)
Date: Fri, 30 May 2008 13:40:13 -0700 (PDT)
Subject: ThreadPoolingMixIn
Message-ID: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>

Hi, everybody!

I wrote a useful class ThreadPoolingMixIn which can be used to create
fast thread-based servers. This mix-in works much faster than
ThreadingMixIn because it doesn't create a new thread on each request.

Is it worth including in SocketServer.py?


from __future__ import with_statement
from SocketServer import ThreadingMixIn
import threading
import Queue
class ThreadPoolingMixIn(ThreadingMixIn):
    """Mix-in class to handle requests in a thread
pool.

    The pool grows and thrinks depending on
load.

    For instance, a threading UDP server class is created as
follows:

    class ThreadPoolingUDPServer(ThreadPoolingMixIn, UDPServer):
pass

    """
    __author__ = 'Pavel Uvarov <pavel.uvarov at gmail.com>'

    def init_thread_pool(self, min_workers = 5,
                         max_workers = 100, min_spare_workers = 5):
        """Initialize thread pool."""
        self.q = Queue.Queue()
        self.min_workers = min_workers
        self.max_workers = max_workers
        self.min_spare_workers = min_spare_workers
        self.num_workers = 0
        self.num_busy_workers = 0
        self.workers_mutex = threading.Lock()
        self.start_workers(self.min_workers)

    def start_workers(self, n):
        """Start n workers."""
        for i in xrange(n):
            t = threading.Thread(target = self.worker)
            t.setDaemon(True)
            t.start()

    def worker(self):
        """A function of a working
thread.

        It gets a request from queue (blocking if
there
        are no requests) and processes
it.

        After processing it checks how many spare
workers
        are there now and if this value is greater
than
        self.min_spare_workers then the worker
exits.
        Otherwise it loops
infinitely.

        """
        with self.workers_mutex:
            self.num_workers += 1
        while True:
            (request, client_address) = self.q.get()
            with self.workers_mutex:
                self.num_busy_workers += 1
            self.process_request_thread(request, client_address)
            self.q.task_done()
            with self.workers_mutex:
                self.num_busy_workers -= 1
                if self.num_workers - self.num_busy_workers > \
                        self.min_spare_workers:
                    self.num_workers -= 1
                    return

    def process_request(self, request, client_address):
        """Puts a request into
queue.

        If the queue size is too large, it adds extra
worker.

        """
        self.q.put((request, client_address))
        with self.workers_mutex:
            if self.q.qsize() > 3 and self.num_workers <
self.max_workers:
                self.start_workers(1)

    def join(self):
        """Wait for all busy threads"""
        self.q.join()


From vinay_sajip at yahoo.co.uk  Thu May 29 13:28:24 2008
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Thu, 29 May 2008 10:28:24 -0700 (PDT)
Subject: Custom log handler and logging.config.fileConfig()
References: <mailman.1700.1212008047.12834.python-list@python.org> 
	<72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com> 
	<mailman.1739.1212072832.12834.python-list@python.org>
Message-ID: <ce1bb584-9551-4b6d-93ca-8788013fb2f0@k37g2000hsf.googlegroups.com>

On 29 May, 15:53, "Lowell Alleman" <low... at allemansonline.com> wrote:
> Is there any reason not to do this assignment in the "myhandler.py"
> directly?  This would save a step for each application that needs to
> use it.
>
> Starting from your example, it would now look like this:
>
> # -- myhandler.py ---
> importlogging.handlers
>
> class MySpecialHandler(logging.handlers.RotatingFileHandler):
>     def __init__(self, fn):
>        logging.handlers.RotatingFileHandler.__init__(self, fn,
>            maxBytes=2000, backupCount=3)
>
> # Register handler in the "logging.handlers" namespacelogging.handlers.MySpecialHandler = MySpecialHandler
>
> # -- app.py ---
> importlogging.handlers,logging.config
> import myhandler
>
> logging.config.fileConfig("logging.ini")
> ...

Doing it the way you suggest should be fine.

Regards,

Vinay Sajip


From paul.hankin at gmail.com  Wed May 21 02:47:14 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 23:47:14 -0700 (PDT)
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
	<mailman.1385.1211299351.12834.python-list@python.org>
Message-ID: <9d9dadfe-3f91-44a6-8b1b-50fe8003046d@e39g2000hsf.googlegroups.com>

On May 20, 5:02?pm, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script

'filter' returns a string if it's argument is a string, so works
nicely here.

def cleanup(s):
    return filter(lambda x: x not in ' -', s)

--
Paul Hankin


From rschroev_nospam_ml at fastmail.fm  Mon May 12 03:15:36 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 12 May 2008 09:15:36 +0200
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <4827bda2$0$11606$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net>
Message-ID: <r8SVj.6441$KQ4.1555@newsfe10.ams2>

John Salerno schreef:
> Ben Finney wrote:
> 
>> John Salerno <johnjsal at gmailNOSPAM.com> writes:
>>
>>> num = 33
>>>
>>> for x in xrange(10):
>>>     print num += 1
>> Which is better done by 'num += 10'.
>>
>> Can you come up with an example that isn't trivially replaced with
>> clearer code? That might make it clearer what your concern is.
> 
> ::sigh:: No, unfortunately I don't have a strong enough grasp of Python
> to give a really in-depth example. I understand what you're asking
> though. Perhaps people don't use this idiom as much as I think they do,
> so to give a trivial example to support my point isn't helpful.

Perhaps a function to print some text a number of times:

def print_n(text, n):
   for i in xrange(n):
     print text

(Though I guess you can replace that with print '\n'.join(msg * n) )

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 12:30:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 18:30:35 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
	<48340938$0$10773$426a74cc@news.free.fr>
	<e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
Message-ID: <483c3729$0$10892$426a74cc@news.free.fr>

Simon Forman a ?crit :
> On May 21, 4:36 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Simon Forman a ?crit :
(snip)
>>> If order is important, you can use sorted() instead of list() like so:
>>> def compress(s):
>>>     new = sorted(set(s), key=s.index)
>>>     return return ''.join(new)
>> This won't still preserve the *original* order.
> 
> 
> I don't understand.
> 
> new will contain each unique item in s, sorted in order of the items'
> first occurance in s, right?

Yep. Answered too fast, missed the key param. Sorry.



From jonbutler88 at googlemail.com  Wed May 21 04:18:00 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 01:18:00 -0700 (PDT)
Subject: HTMLParser error
Message-ID: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>

Just writing a simple website spider in python, keep getting these
errors, not sure what to do. The problem seems to be in the feed()
function of htmlparser.

Traceback (most recent call last):
  File "spider.py", line 38, in <module>
    s.crawl(site)
  File "spider.py", line 30, in crawl
    self.parse(url)
  File "spider.py", line 21, in parse
    self.feed(urlopen('http://' + page).read())
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/HTMLParser.py", line 107, in feed
    self.rawdata = self.rawdata + data
AttributeError: Spider instance has no attribute 'rawdata'

Any ideas of how to fix this? Im using python 2.5.2 on mac osx


From paul at subsignal.org  Thu May 29 09:45:59 2008
From: paul at subsignal.org (paul)
Date: Thu, 29 May 2008 15:45:59 +0200
Subject: Any way to loop through object variables?
In-Reply-To: <483E8C2B.4050700@ecs.soton.ac.uk>
References: <483D7A47.3030606@ecs.soton.ac.uk>	<483D8614.7000808@islandtraining.com>	<7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
	<483E8C2B.4050700@ecs.soton.ac.uk>
Message-ID: <g1mc2l$1ro$1@ger.gmane.org>

Dave Challis schrieb:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Ah thanks, vars(...) was exactly what I was after.  I'd come across
> dir() before, but this returns more than I need.
It seems vars() misses class attributes tho...

cheers
  Paul



From ivan.illarionov at gmail.com  Tue May 27 22:06:00 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 02:06:00 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
Message-ID: <g1iem8$r5$3@news.mtu.ru>

On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>> 
>>> Greetings, Ivan Illarionov.
>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>
>>>>> As I've said before - good programmers can write good code in any
>>>>> language.
>>>> Yes, they can. But it may be harder to do for them in one language
>>>> and easier in another.
>>> It's obvious lie. If you have clear mind and you know language you're
>>> using, there are absolutely NOTHING can deny you to write clear code.
>>> Even using forth postfix notation, I have no problem writing good
>>> code, it's as easy as writing bad code. And yes, I do see the
>>> difference.
>> 
>> No. Language does matter.
> 
> Not for a good programmer.  Only for half-assed ones.

No. Language does matter


From jstucklex at attglobal.net  Sun May 25 14:15:57 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 14:15:57 -0400
Subject: php vs python
In-Reply-To: <37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
Message-ID: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>

Lie wrote:
> On May 22, 12:28 pm, NC <n... at iname.com> wrote:
>> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>>
>>
>>
>>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
>>> Yet, I want learn the guts of it instead of just booting up some
>>> wordwank or whatever.
>> Here's a simple computation to consider...  WordPress' codebase is
>> approximately a megabyte of PHP code and megabyte of JavaScript code.
>> Assuming that the average line of that code is 50 characters long, you
>> are looking at 20,000 lines of code in PHP and as many in JavaScript.
>> Based on the notion that the average developer out there writes 100
>> lines a day, either you're in for a two-year project or your product
>> is going to have seriously reduced functionality compared to something
>> that's been freely available for years.  What's your choice?
> 
> Nope, the core functionality of a blogging software could be
> replicated in just a few lines of PHP codes, in the range of tens to
> hundreds of lines. If you're creating your own blogging software, you
> wouldn't seriously think you'd recreate all those things such as
> pingbacks, commenting system, etc, etc, etc. No, you'd start with some
> basic core functionalities: a few simple server side includes only.

As he said - it's either a two man-year project or your product is going 
to have seriously reduced functionality.  It looks like you are opting 
for the latter.

Also, you still need to write the server-side includes.  But they won't 
do nearly enough for everything WordPress does.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From d3vvnull at gmail.com  Thu May  8 08:11:56 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 07:11:56 -0500
Subject: python equivalent to perl's inplace edit mechanism
Message-ID: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>

Does python have an equivalent to Perl's inplace-edit variable $^I?
For example, the following perl code below changes mike to dave in a file
that is passed as an argument.

#!/usr/bin/env perl
#chgit script
$^I = '';
while(<>) {
  s/mike/dave/g;
  print;
}

The script would be used as below:
chgit somefile

Afterward, all instances of mike are changed to dave.

Thanks.

Mike

-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
-------------- next part --------------
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URL: <http://mail.python.org/pipermail/python-list/attachments/20080508/6948cfc2/attachment.html>

From python at rcn.com  Thu May 29 02:45:33 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 28 May 2008 23:45:33 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
References: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>
Message-ID: <34a8567f-4aeb-41a8-890a-b9980ed57012@j33g2000pri.googlegroups.com>

On May 28, 4:41?pm, blaine <frik... at gmail.com> wrote:
> 1. ?Whats a good way to get the keys? I'm using a loop with
> random.choice() at the moment.

Why not keep a separate list of keys and use random.sample()?


Raymond


From ivan.illarionov at gmail.com  Thu May 15 00:17:21 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 15 May 2008 04:17:21 +0000 (UTC)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <g0gdgg$1dio$1@news.mtu.ru>

On Wed, 14 May 2008 09:21:10 -0700, vbgunz wrote:
> [...] 
> when you see
> one, what is the first thing that comes to mind? When you write one,
> what was the first thing on your mind? Other than "similar to static-
> methods", at what point will you be glad you used one? To sum it up,
> what is the best role for a class-method that does not turn your work
> into code-soup?

The first thing on my mind when I see a classmethod is that I may need a 
metaclass here.

class A(object):
    @classmethod
    def do_something_with_aclass(cls):
        pass

    @classmethod
    def do_something_diffferent_with_aclass(cls):
        pass

    def do_something(self):
        pass

is similar to:

class M(type):
    def do_something_with_aclass(cls):
        pass
    
    def do_something_diffferent_with_aclass(cls):
        pass

class A:
    __metaclass__ = M
    
    def do_something(self):
        pass

-- Ivan


From cokofreedom at gmail.com  Tue May  6 07:16:55 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 04:16:55 -0700 (PDT)
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl> 
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org> 
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org> 
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de> 
	<Xns9A90773D0D544duncanbooth@127.0.0.1> <4820319a_7@news.bluewin.ch>
Message-ID: <8f1293e5-26f7-4183-acd4-47fd6eda931a@l42g2000hsc.googlegroups.com>

On May 6, 12:22 pm, Boris Borcic <bbor... at gmail.com> wrote:
> Duncan Booth wrote:
> > Torsten Bronger <bron... at physik.rwth-aachen.de> wrote:
>
> >> The biggest ugliness though is ",".join().  No idea why this should
> >> be better than join(list, separator=" ").  Besides, ",".join(u"x")
> >> yields an unicode object.  This is confusing (but will probably go
> >> away with Python 3).
>
> > It is only ugly because you aren't used to seeing method calls on string
> > literals.
>
> An obviously independent cause of uglyness is the inconsistency of eg
> ','.split() and ','.join()
>
> Cheers, BB

I tend to do ", ".join("%s" % e for e in item)

Is there any difference between this and str()?


From smallfish2007 at gmail.com  Fri May 30 02:45:24 2008
From: smallfish2007 at gmail.com (smalfish)
Date: Thu, 29 May 2008 23:45:24 -0700 (PDT)
Subject: some question with Quixote and Nginx
Message-ID: <4559cbb5-30e1-465a-b2be-56920005a16b@d19g2000prm.googlegroups.com>

hi,
  i have some question with this,quixote publish width FastCGI.the two
scripts like this(root.ptl and hello.ptl):

class RootDirectory(Directory):
    _q_exports = ["", "hello"]

    def _q_index [html] (self):
        """
        <h4>Hello,Blog</h4>
        <li><a href="hello/">hello</a></li>
        """
    hello = HelloDirectory()

class HelloDirectory(Directory):
    _q_exports = ["", "hi"]

    def _q_index [html] (self):
        """
        <h4>hello page</h4>
        <li><a href="/">back home</a></li>
        """

    def hi [html] (self):
        """
        aaaaaaaaaaa
        """

now, on the firefox input:
http://localhost/hello/  --> this ok
http://localhost/hello  --> this will forward http://localhost/hello/hello/
, error.

other:
http://localhost/hello/hi  --> this ok
http://localhost/hello/hi/ --> http://localhost/hello/hi//hello/hi/

i think,some problem with Nginx(PATH_INFO is not correct.)

==================================
nginx.conf:
location / {
     fastcgi_pass 127.0.0.1:8000;
     fastcgi_param SERVER_NAME nginx;
     fastcgi_param PATH_INFO $request_uri;
     fastcgi_param SCRIPT_NAME $fastcgi_script_name;
     fastcgi_param REQUEST_METHOD $request_method;
     fastcgi_param QUERY_STRING $query_string;
     fastcgi_param CONTENT_TYPE $content_type;
     fastcgi_param CONTENT_LENGTH $content_length;
     fastcgi_intercept_errors off;
}

fastcgi:
spawn-fcgi -a 127.0.0.1 -p 8000 -f fastcgi_server.py -u nginx -P /var/
log/nginx/qfcgi.pid


thanks!


From s0suk3 at gmail.com  Tue May 20 11:50:04 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 08:50:04 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>

On May 20, 9:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 8:13 am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > I posted this code last night in response to another thread, and after I
> > posted it I got to wondering if I had misused the list comprehension. Here's
> > the two examples:
>
> > Example 1:
> > --------------------
> > def compress(s):
> >     new = []
>
> >     for c in s:
> >         if c not in new:
> >             new.append(c)
> >     return ''.join(new)
> > ----------------------
>
> > Example 2:
> > ------------------------
> > def compress(s):
> >     new = []
> >     [new.append(c) for c in s if c not in new]
> >     return ''.join(new)
> > --------------------------
>
> > In example 1, the intention to make an in-place change is explicit, and it's
> > being used as everyone expects it to be used. In example 2, however, I began
> > to think this might be an abuse of list comprehensions, because I'm not
> > assigning the result to anything (nor am I even using the result in any
> > way).
>
> > What does everyone think about this? Should list comprehensions be used this
> > way, or should they only be used to actually create a new list that will
> > then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?
>
> def compress(s):
>     seen = set()
>     new = [c for c in s if c not in seen and (seen.add(c) or True)]
>     return ''.join(new)
>
> or just:
>
> def compress(s):
>     seen = set()
>     return ''.join(c for c in s if c not in seen and (seen.add(c) or
> True))
>
> Using the set also gets rid of that nasty quadratic performance
> thingy.

You don't need all those conditionals. A set differs from a list
precisely in the fact that each element is unique. And since the
function is expecting "s" to be an iterable object, it can be
constructed even without a for loop:

def compress(s):
    return list(set(s))

That does the trick.


From gagsl-py2 at yahoo.com.ar  Sun May  4 20:02:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 21:02:01 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <op.uanmdnsrx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 08:11:35 -0300, <castironpi at gmail.com> escribi?:

> On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>>
>> > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>>
>> >> I'm actually curious if there's a way to write a generator function
>> >> (not a generator expression) in C, or what the simplest way to do it
>> >> is... besides link the Python run-time.
>>
>> > The reference implementation of Python is written in C, so obviously there
>> > must be a way to write something like generators in C.
>>
>> Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
>> See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Gabriel,
> How did your attempt turn out from last May?  At first look, it's
> outside the scope of Python, but it is not the scope of C
> necessarily.  Generators offer a lot of simplicity (which I haven't
> read about extensively, but am starting to see) that could gain some
> reputation for Python.  What is the midpoint at which C could meet
> Python?
>
> There is no such thing as a 'frame' per se in C; byte code is
> integral.  As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state.  It's
> a hard thing to Google for without knowing the prior terminology for
> the work that's already been done on them in C.  What work is there?
> Are any devs interested in pursuing it?

The frame and generator implementations are very tightly coupled to Python code, they aren't useful for implementing generators in C. Don't bother to read them.

Unfortunately, converting a C function into something like a generator isn't as easy as using the "yield" statement... Although the idea is simple, the implementation may be hard sometimes: You have to wrap the function within an object, maintain all state information into that object, and do all computation in the "next" method. Also, __iter__ should return itself so it can be called as an iterator.
(those objects are sometimes called "functors" <http://en.wikipedia.org/wiki/Function_object> not the same meaning as functors in Mathematics)

All examples that I have at hand are propietary code so I can't post them. The itertools module may be used as reference - "cycle" and "chain" are the easiest I think, although they might be *too* easy to understand the structure. "groupby" is a more complex example but at the same time harder to understand. See http://svn.python.org/projects/python/trunk/Modules/itertoolsmodule.c

Ok, I'll try to use Python code as an example. A generator for Fibonacci numbers:

def fibo():
     a = b = 1
     while True:
         a, b = b, a+b
         yield b

We can convert that function into this object; it should be written in C, not Python, but the idea is the same:

class fibo:
     def __init__(self):
         self.a = 1
         self.b = 1
     def next(self):
         temp = self.a + self.b
         self.a = self.b
         self.b = temp
         return temp
     def __iter__(self):
         return self

It behaves exactly the same as the generator above; we can even use the same code to test it:

py> for n in fibo():
...   if n>100: break
...   print n
...
2
3
5
8
13
21
34
55
89

Converting that class into C code should be straightforward. And then you have a generator-like function written in C.

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Tue May 20 12:22:29 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 09:22:29 -0700 (PDT)
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
	<mailman.1385.1211299351.12834.python-list@python.org>
Message-ID: <93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>

On May 20, 11:02 am, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script
>
> Any help is highly appreciated.

string.replace('-', '').replace(' ', '')


From skanemupp at yahoo.se  Sat May 10 21:12:37 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 10 May 2008 18:12:37 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
Message-ID: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>

http://reddit.com/r/programming/info/18td4/comments

claims people take a lot of time to write a simple program like this:


"Write a program that prints the numbers from 1 to 100. But for
multiples of three print "Fizz" instead of the number and for the
multiples of five print "Buzz". For numbers which are multiples of
both three and five print "FizzBuzz".

for i in range(1,101):
    if i%3 == 0 and i%5 != 0:
        print "Fizz"
    elif i%5 == 0 and i%3 != 0:
        print "Buzz"
    elif i%5 == 0 and i%3 == 0:
        print "FizzBuzz"
    else:
        print i


is there a better way than my solution? is mine ok?


From wuwei23 at gmail.com  Thu May 29 20:00:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 17:00:19 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
	<4c2b01e4-10b3-455d-a29e-bc5bb31a8264@59g2000hsb.googlegroups.com>
Message-ID: <3ef14f41-2b87-4917-bf9e-4663946b28d1@d19g2000prm.googlegroups.com>

On May 30, 9:50 am, p... at ulkarodgers.com wrote:
> Have you shown this stuff to the google AppEngine folks!
> Thats being touted as the thing that'll make web-2 easy
> App-Engine has the persistence, and the integration, its missing the
> others and without them it'll never be great.

Google App Engine is _only_ focused on providing a framework for
scaleable apps, the GUI end is left entirely up to the developer (and
really _shouldn't_ be integrated at that level, IMO).

There's nothing preventing you from building something on top of GAE
that does what you want; using their AJAX Libraries API is a good
place to start: http://code.google.com/apis/ajaxlibs/


From __peter__ at web.de  Thu May 29 06:36:49 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 12:36:49 +0200
Subject: Error: Cannot convert Decimal("0.0000") to Decimal
References: <32b8c8c0-e567-477f-9495-56e38ec2b2c1@e53g2000hsa.googlegroups.com>
Message-ID: <g1m0vv$fih$03$1@news.t-online.com>

Vitaliy wrote:

> I got this wired exception periodically (Python 2.5, Django based
> application)
> what does it mean ?

A reload() maybe?

>>> import decimal
>>> d = decimal.Decimal()
>>> reload(decimal)
<module 'decimal' from '/usr/lib/python2.5/decimal.pyc'>
>>> decimal.Decimal(d)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/decimal.py", line 617, in __new__
    raise TypeError("Cannot convert %r to Decimal" % value)
TypeError: Cannot convert Decimal("0") to Decimal

Peter


From ricaraoz at gmail.com  Mon May 12 10:03:08 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Mon, 12 May 2008 11:03:08 -0300
Subject: python vs. grep
In-Reply-To: <7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
Message-ID: <48284E1C.5050107@bigfoot.com>

Ville Vainio wrote:
> On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> 
>> All these examples assume your regular expression will not span multiple
>> lines, but this can easily be the case. How would you process the file
>> with regular expressions that span multiple lines?
> 
> re.findall/ finditer, as I said earlier.
> 

Hi, sorry took so long to answer. Too much work.

findall/finditer do not address the issue, they merely find ALL the 
matches in a STRING. But if you keep reading the files a line at a time 
(as most examples given in this thread do) then you are STILL in trouble 
when a regular expression spans multiple lines.
The easy/simple (too easy/simple?) way I see out of it is to read THE 
WHOLE file into memory and don't worry. But what if the file is too 
heavy? So I was wondering if there is any other way out of it. Does grep 
read the whole file into memory? Does it ONLY process a line at a time?



From nkarkhan at gmail.com  Thu May 29 15:09:26 2008
From: nkarkhan at gmail.com (nkarkhan)
Date: Thu, 29 May 2008 12:09:26 -0700 (PDT)
Subject: Remote Debugging for python.
Message-ID: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>

Newbie to python here..so bear with me.

I used to be able to gdb to a target machine running c/c++ code and
see where my program was hanging, crashing, executing..

How do I do that with python?
I have multi-threaded python programs running on a remote machine. I
want to se where they are at any instance.

If remote debugging is too much to ask for.. what about local
debugging?
Can i break into an executing program and see at source-level where my
pyhton program/process/thread is at?

Thank you,
Nitin.


From agustin.villena at gmail.com  Mon May 19 09:54:05 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Mon, 19 May 2008 06:54:05 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
Message-ID: <0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>

On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Agustin Villena schrieb:
>
>
>
> > Hi!
>
> > is there anyway to show the class of amethodin an exception's
> > traceback?
>
> > For example, the next code
>
> > class Some(object):
> >     def foo(self,x):
> >         raise Exception(x)
>
> > obj = Some()
> > obj.foo("some arg")
>
> > produces the next traceback
>
> > Traceback (most recent call last):
> >   File "<string>", line 231, in run_nodebug
> >   File "G:\dev\exceptions\sample.py", line 7, in <module>
> >     obj.foo("some arg")
> >   File "G:\dev\exceptions\sample.py", line 3, in foo
> >     raise Exception(x)
> > Exception: some arg
>
> > I want to improve the line
> > File "G:\dev\exceptions\sample.py", line 3, in foo
>
> > to
> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>
> > Is this improvement feasible
>
> It should be. You can get a dictionary of the locals of an exception
> stack frame, of which you could extract the self-parameter's class.
>
> Diez

Hi!

I digged on sys.exc_info() object and the traceback module and I
could't figure how I can get the locals() of the exception stackframe

Any advice?

Thanks
  Agustin


From hat at se-162.se.wtb.tue.nl  Tue May 27 04:55:24 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 27 May 2008 10:55:24 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>

On 2008-05-27, Alex Gusarov <alex.m.gusarov at gmail.com> wrote:
> Hello, I have strong .NET background with C# and want to do some
> familiar things from it with Python, but don't know how. For example,
> I created form in qt designer with QCalendarWidget, translated it into
> Python module and want to overload virtual method paintCell of
> QCalendarWidget. In C# I can write following (abstract) code:
>
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
>
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }

Not sure what you are doing here precisely, as I have no knowledge at all in
C#. It may be useful to explain in words what you intend to do.

> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's
> long and I must create additional class). The only thing I done its

It is going to be long in both cases, assuming you code the same functionality.
Why are you so worried about 5 lines of code (for making a new class)?


> full replacement of handler:
>
> calendar.paintCell = myPaintCell
>
> def myPaintCell(self):
>     pass
>
> Operator += don't work with methods. So, I can't add handler or call
> standart handler from my (infinite recursion, cause my handler
> replaced standart)

Yes you can, prefix with the class name, as in

def myPaintCell(self):
    PaintCell.paintcell(self) # Call base class
    pass

> Please, give me some advice, I know Python must be good enough to do
> such things fast and elegant.

In my view, 'elegant' would be to derive a new class:

class MyPaintCell(PaintCell):
    def paintcell(self):
        PaintCell.paintcell(self)
        myPaintCell(self)

(hmm, only 4 lines, I overestimated the cost. Sorry)

Sincerely,
Albert


From zaka3enator at gmail.com  Mon May  5 10:49:56 2008
From: zaka3enator at gmail.com (Zaka)
Date: Mon, 5 May 2008 07:49:56 -0700 (PDT)
Subject: Pygame and PGU
References: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>
	<688ktbF2rlolmU1@mid.uni-berlin.de>
Message-ID: <9784ac77-4984-4f1b-b473-2c027b29979d@24g2000hsh.googlegroups.com>

On 5 Maj, 16:45, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Zaka wrote:
> > Hi. I need some help to make map system in PGU. For exmple we have 2
> > maps and when we leave first we enter to second.
>
> > --------------------
> >                    !
>
> > ___________
>
> What is a PGU? What is a map-system? And what is that ascii art above?
>
> And what might you learn from reading this:
>
> http://www.catb.org/~esr/faqs/smart-questions.html
>
> Diez

PGU is http://www.imitationpickles.org/pgu/wiki/index

Meaby this is not map-system but map changer like in RPG game


From hongyuan1306 at gmail.com  Mon May  5 23:52:10 2008
From: hongyuan1306 at gmail.com (Yuan HOng)
Date: Tue, 6 May 2008 11:52:10 +0800
Subject: Decimal vs Float comparasion
Message-ID: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>

Hi,

It seems decimal object will always be larger than float in
comparasion, which goes against common sense:

>>> from decimal import Decimal
>>> a = Decimal('0.5')
>>> a > 99999
False
>>> a > 99999.0
True

It seems to me that rather than allowing this to happen, comparasion
between the two should either be made correct (by convertion decimal
to float e.g.) or forbidden, like arithmatic operations between the
two types.

-- 
Hong Yuan

?????????
???????????
http://www.homemaster.cn

From john106henry at hotmail.com  Tue May 13 16:36:41 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 13:36:41 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
Message-ID: <e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>

On May 13, 1:18 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> John Henry schrieb:
>
> > Hi list,
>
> > I can't understand this.  The following import statement works fine:
>
> >     from PythonCard.templates.dialogs import runOptionsDialog
>
> > but this one fails:
>
> >     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> > I've checked and rechecked to make sure that the spellings are proper
> > and that the tools, the codeEditor directory, and codeEditor.py, and
> > the class CodeEditor all exists and yet idle keep complaining that it
> > can't import from PythonCard.tools.
>
> How do these complaints *look* - we can't read your mind nor your
> screen, as you might imagine....
>
> > What's going on?  (Running Python2.5 under WinXP).
>
> What do you think is more probable - pythons import-mechanism, the
> foundation of nearly all libraries, is broken - or you make a mistake?
>
> Diez

Thumper's dad always told him:  If you don't have anything nice/useful/
garbage to say, then don't say noth'ng at all.

Next.


From rishab at students.iiit.ac.in  Wed May  7 02:15:02 2008
From: rishab at students.iiit.ac.in (rishab at students.iiit.ac.in)
Date: Wed, 7 May 2008 11:45:02 +0530 (IST)
Subject: loading folder list from my mailbox in python
Message-ID: <47066.124.123.160.204.1210140902.squirrel@students.iiit.ac.in>

Hey everyone,
I want to print the folder list of my mailbox using python (IMAP4), and
with hierarchy, i.e. it should print all the names of the folders of my
mailbox and the folders within them.
Can anyone please help me with this.




From xng at xs4all.nl  Thu May  8 03:17:49 2008
From: xng at xs4all.nl (Martin P. Hellwig)
Date: Thu, 08 May 2008 09:17:49 +0200
Subject: python newbie: some surprises
In-Reply-To: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <4822aa07$0$2016$e4fe514c@dreader28.news.xs4all.nl>

v4vijayakumar wrote:
> When I started coding in python, these two things surprised me.
> 
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.
> 
Even the standard editor Idle tries to guess the intendation, so this 
was never a problem for me. Though these days I use PyDev a lot.

> 2. python requires to pass "self" to all instance methods
A lot of editors help you with these 'unnecessary' things by 
auto-completion might be worth looking into one.
> 
> and I missed ":" often. :)
Still do after 5 years of python abuse :-)

-- 
mph


From mal at egenix.com  Tue May  6 04:28:20 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 10:28:20 +0200
Subject: psycopg2 ReferenceManual
In-Reply-To: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
References: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
Message-ID: <482016A4.90003@egenix.com>

On 2008-04-30 16:52, David Anderson wrote:
> Hi all, where can I find the reference manual from the psycopg2 or the
> dbapi2.0 because in their official pages I could'nt find

The Python DB-API 2.0 is defined in the PEP 249:

http://www.python.org/dev/peps/pep-0249/

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From wuwei23 at gmail.com  Wed May 14 22:56:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 14 May 2008 19:56:15 -0700 (PDT)
Subject: Passing functions around and executing
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
Message-ID: <db5e55ac-5e91-40c8-8bdb-e573436a986c@l17g2000pri.googlegroups.com>

On May 15, 10:53 am, PatrickMinnesota <PatrickMinnes... at gmail.com>
wrote:
> I have a bunch of functions.  I want to put them in a list.  Then I
> want to pass that list into another function which does some setup and
> then loops through the list of passed in functions and executes them.
> Some of them need arguments passed in too.

Hey Patrick,

Is something like the following helpful?

>>> def fn1(): print 'fn1'
>>> def fn2(): print 'fn2'
>>> fn_list = [fn1, fn2]
>>> def process(fn_seq):
...     # do set up here
...     for fn in fn_list:
...         fn()

>>> process(fn_list)
fn1
fn2

The easiest way to extend this for optional argument passing would be
to have each function accept keyword arguments, and then to pass a
dictionary of arguments in to each:

>>> def fn1(**kwargs): print 'fn1'
>>> def fn2(**kwargs): print 'fn2: x=%(x)s' % kwargs
>>> fn_list = [fn1, fn2]
>>> def process(fn_seq):
...     x = 'hello'
...     for fn in fn_list:
...         fn(**locals())

>>> process(fn_list)
fn1
fn2: x=hello

You could replace 'process' with a list comprehension:

>>> args = dict(x='hello again')
>>> results = [f(**args) for f in fn_list]
fn1
fn2: x=hello again

Or use 'map':

>>> process = lambda f: f(**args)
>>> results = map(process, fn_list)
fn1
fn2: x=hello again

Sorry, I'm a little bored.

- alex23


From tjreedy at udel.edu  Sun May  4 23:24:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 4 May 2008 23:24:13 -0400
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com><684r62F2rmn3gU2@mid.uni-berlin.de><mailman.513.1209878553.12834.python-list@python.org><dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<op.uanmdnsrx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <fvluks$thp$1@ger.gmane.org>

A 'generator function' -- a function that when called returns a generator 
object, a specific type of iterator,  is a rather Python specific concept. 
Better to think,  I think, in terms of writing an iterator 'class' (in C, 
struct with associated function).  Looking at the implementation of two of 
the itertools in the link below (previously posted), I could see the 
'template' that each was based on and that would be the basis for writing 
another.  (And I have not programmed C for a decade.  Raymond's code is 
quite clear.)

=================================
[Outlook Express does not 'quote' this post properly]

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.uanmdnsrx6zn5v at a98gizw.cpe.telecentro.net.ar...

 The itertools module may be used as reference - "cycle" and "chain" are 
the easiest I think, although they might be *too* easy to understand the 
structure. "groupby" is a more complex example but at the same time harder 
to understand. See 
http://svn.python.org/projects/python/trunk/Modules/itertoolsmodule.c

Ok, I'll try to use Python code as an example. A generator for Fibonacci 
numbers:

def fibo():
     a = b = 1
     while True:
         a, b = b, a+b
         yield b

We can convert that function into this object; it should be written in C, 
not Python, but the idea is the same:

class fibo:
     def __init__(self):
         self.a = 1
         self.b = 1
     def next(self):
         temp = self.a + self.b
         self.a = self.b
         self.b = temp
         return temp
     def __iter__(self):
         return self

=============================
Terry again: one can think of a generator function as an abbreviation of an 
iterator class.  Calling the gen. func. produces an iterator instance just 
like calling the class object.
=============================
[back to Gabriel]
It behaves exactly the same as the generator above; we can even use the 
same code to test it:

py> for n in fibo():
...   if n>100: break
...   print n
...
2
3
5
8
13
21
34
55
89

Converting that class into C code should be straightforward. And then you 
have a generator-like function written in C.

==================================





From exarkun at divmod.com  Mon May  5 13:38:13 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 13:38:13 -0400
Subject: [Twisted-Python] Counting errors in a DeferredList and avoiding
	Unhandled error in Deferred messages
In-Reply-To: <18463.16271.516266.379803@jon.es>
Message-ID: <20080505173813.6859.2132215018.divmod.quotient.59119@ohm>

On Mon, 5 May 2008 19:10:39 +0200, Terry Jones <terry at jon.es> wrote:
>If I pass a list of deferreds to DeferredList and want to add a callback to
>the DeferredList to look at whatever errors have occurred in the underlying
>deferreds, should I do something like this:
>
>  deferreds = []
>  for x in whatever:
>    deferreds.append(funcReturningDeferred(x))
>
>  dl = DeferredList(deferreds)
>  dl.addCallback(errorCheckingFunc)
>
>  for d in deferreds:
>    d.addErrback(lambda _: pass)
>
>
>This ensures that errorCheckingFunc gets defer.FAILURE for those deferreds
>that finished up in their errback chain. Adding the lambda _: pass errback
>to each deferred in deferreds after it has been passed to DeferredList
>makes sure the errback chain doesn't later reach its end with an unhandled
>error.
>
>It that the right/best/approved way to handle needing to deal with errors
>in the callback of a DeferredList and not trigger the "Unhandled error in
>Deferred" message?
>

You can do this (if you replace `pass? with `None?, anyway) or you can
pass `consumeErrors=True? to the `DeferredList? initializer which will
make it do something equivalent.

Jean-Paul


From mishok13 at gmail.com  Fri May 23 14:09:27 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Fri, 23 May 2008 21:09:27 +0300
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <192840a00805231109o222e4a82le0ba442c817ef02e@mail.gmail.com>

2008/5/22 cm_gui <cmgui2 at gmail.com>:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Troll harder.

> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From lavrey-2 at mail.ru  Sat May 24 12:01:26 2008
From: lavrey-2 at mail.ru (yura)
Date: Sat, 24 May 2008 09:01:26 -0700 (PDT)
Subject: ero magazines
Message-ID: <36740ee1-be49-4961-bcf9-3eb1ca41e243@c65g2000hsa.googlegroups.com>

http://ero-mag.net


From basti.wiesner at gmx.net  Mon May 26 11:49:01 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 17:49:01 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <g1em6f$916$02$1@news.t-online.com>

[ erik.oosterwaal at gmail.com <erik.oosterwaal at gmail.com> ]

> 1. I love the control I have over my html using inline, template-based
> vbscript. ASP.NET's web forms really sound like a very bad idea, also
> the approach Microsoft takes in trying to make a stateless web-app
> seem like a statefull application is IMHO a burden. I think webapps
> are inherently different than desktop apps, and should be programmed
> as such.
> [...]
> 3. I like the rapid development I can do in a dynamic, loosely typed
> language like vbscript. The performance-bottleneck of a site is mostly
> in the database-access and the http-calls and I think writing all of
> the declarations and types for a strong-typed language is overkill for
> a webapp.
> 
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
> 
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.

Summarising, you are searching for a framework, which allows you to embed
much code in templates, follows the directory structure of a classic
conventional website and has ORM features, but does not resemble desktop
programming or use the MVC pattern.

In this case I feel like have to disappoint you, I don't know any such thing
for python.  You will have to put this together from different components. 

I guess, using a simple WSGI wrapper as Werkzeug or Paste, and combining it
with a powerful ORM like SQLAlchemy and a templating engine, which allows
you to embed full python code in the templates (e.g. Mako), will best suite
your needs, as it gives you the freedom to design the application following
your ideas.  

Modern frameworks like Django or Grok require a somewhat great adaption,
since they strongly restrict the programmer's freedom.  I doubt, that you
would get Django or Grok working like your asp framework.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From mwilson at the-wire.com  Thu May 22 14:46:57 2008
From: mwilson at the-wire.com (Mel)
Date: Thu, 22 May 2008 14:46:57 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
Message-ID: <g14f5u$ioe$1@aioe.org>

Mensanator wrote:

> On May 22, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
>> Dave Parker <davepar... at flamingthunder.com> wrote:
>> > But after getting input from children and teachers, etc, it started
>> > feeling right.
>>
>> > For example, consider the two statements:
>>
>> > x = 8
>> > x = 10
>>
>> > The reaction from most math teachers (and kids) was "one of those is
>> > wrong because x can't equal 2 different things at the same time".
>>
>> This is a common feature in functional languages...
>>
>> Eg
>>
>> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
>> [async-threads:0] [kernel-poll:false]
>>
>> Eshell V5.6.2 ?(abort with ^G)
>> 1> X = 8.
>> 8
>> 2> X = 10.
>> ** exception error: no match of right hand side value 10
>> 3>
>>
>> That error message is the erlang interpreter saying "Hey I know X is
>> 8, and you've said it is 10 - that can't be right", which is pretty
>> much what math teachers say too...
> 
> Are you saying that erlang treats 1> as an assignment, yet
> treats 2> as a comparison?
> 
> That's inconsistent. No wonder nobody uses erlang.

In Prolog terms, they're both unification.  If X has never been defined you
can define it as 8 with no chance of contradicting anything.  Once X is 8,
the proposition "X is 10" is false.

I act as though Erlang thinks the same. My Erlang chops aren't as good as my
Prolog chops were.

        Mel.




From gherron at islandtraining.com  Tue May 27 18:26:04 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 15:26:04 -0700
Subject: Maximum items in a list?
In-Reply-To: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>
References: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>
Message-ID: <483C8A7C.50408@islandtraining.com>

Zerge wrote:
> Hi,
>
> Is there a theoretical limit to the number of items that can be
> appended to a list?
> thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

No, only practical limits of memory, time and such.

Gary Herron



From tdahsu at gmail.com  Fri May 23 10:25:10 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Fri, 23 May 2008 07:25:10 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
	<e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>
	<46a05430-18c9-4383-a22f-2006036842dd@d45g2000hsc.googlegroups.com> 
	<B4WdnSHyV_6c26vVnZ2dnUVZ_gudnZ2d@earthlink.com>
Message-ID: <64923c66-0076-4b7b-af2c-1180fb560b4b@34g2000hsf.googlegroups.com>

On May 23, 12:20?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Thu, 22 May 2008 11:03:48 -0700 (PDT), tda... at gmail.com declaimed the
> following in comp.lang.python:
>
> > Ah, well, I didn't get any other responses, but here's what I've done:
>
> ? ? ? ? Apparently the direct email from my work address did not get through
> (I don't have group posting ability from work).
>
> > loopCount = 0
> > ? ? ? ? ? ? ? ? for l in range(len(self.filesToProcess)):
> > ? ? ? ? ? ? ? ? ? ? threads = []
> > ? ? ? ? ? ? ? ? ? ? try:
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +l])))
>
> ? ? ? ? Python lists index from 0... So this will be 0+0, first entry in the
> file list
>
>
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +2])))
>
> ? ? ? ? This is 0+2, THIRD entry in the file list -- you've just skipped
> over the second entry...
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +3])))
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +4])))
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +5])))
>
> ? ? ? ? Very ugly... Also going to fail for other reasons... Consider:
>
> filestoprocess = [ 'file1', 'file2', 'file3' ]
> for jnk in range(len(filestoprocess)): ?#this will loop three times!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #jnk = 0, 1, 2
>
> ? ? ? ? You proceed to create FIVE threads (or try to) when there are only
> THREE files... It will fail as soon as it tries loopCount+3 (fourth
> entry in a three element list)
>
> > ? ? ? ? ? ? ? ? ? ? ? ? msg = "Processing file...\n"
> > ? ? ? ? ? ? ? ? ? ? ? ? for thread in threads:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? wx.CallAfter(self.textctrl03.write(msg),
> > thread.start())
>
> ? ? ? ? Is this running as the main controller of some GUI? if so...
>
> > ? ? ? ? ? ? ? ? ? ? ? ? for thread in threads:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? thread.join()
>
> ? ? ? ? Your GUI will essentially freeze since it can't process events
> (including screen updates) until the entire function you are in returns
> to the event handler... But .join() blocks until the specified thread
> really finishes...
>
> > ? ? ? ? ? ? ? ? ? ? ? ? loopCount += 5
> > ? ? ? ? ? ? ? ? ? ? except IndexError:
> > ? ? ? ? ? ? ? ? ? ? ? ? pass
>
> ? ? ? ? BAD style -- if you are going to trap an exception, you should do
> something with it... But then, the only reason you would GET this
> exception is because the preceding code is looping too many times
> relative to the number of files...
>
> ? ? ? ? As shown, with three files, you will create the first thread (0) for
> first file, skip the second file creating the second thread (1) for the
> third file, and raise an exception on trying to create the third thread
> (2) when you try to access a fourth file in the list. ?The exception
> will be raised -- SKIPPING over the thread.start() calls, and skipping
> the thread.join() calls. You then ignore the error, and go back to the
> start of the loop where the index is now "1"... AND reset the thread
> list, so threads 0&1 are forgotten, never started, never joined, garbage
> collected...
>
> ? ? ? ? Again, you now create a thread (0) giving it the second file (since
> loopCount was never incremented, and the first thread is using loopCount
> + <loopindex>), create thread (1) giving it the third file, raise the
> exception... repeat
>
>
>
> > It works, and it works well. ?It starts five threads, and processes
> > five files at a time. ?(In the "self.processFiles" I read the whole
> > file into memory using readlines(), which works well.)
>
> ? ? ? ? It only works as long as loopCount+5 is less than the number of
> files in the list... AND at that, it skips one file and double processes
> another...
>
> > Of course, now the wx.CallAfter function doesn't work... I get
> > "TypeError: 'NoneType' object is not callable" for every time it is
> > run...
>
> ? ? ? ? Probably because it wants you to supply it with one or two
> /callable/ functions... but you are actually calling the functions and
> passing it the results of the called functions (and they aren't
> returning anything -- None).
>
> ? ? ? ? Ignoring GUI stuff... here is a simple one-job threadpool algorithm
> -- you have to plug in the file list and the actual processing work. It
> creates n-threads; and those threads pull the work off of a common
> queue; the main program only has to fill the queue with the work to be
> done, and stuff a sentinal value onto the queue when it wants the
> threads to die -- which would be before shutdown of the program (create
> the pool at start-up, leave the threads blocked on the .get() until you
> need one to process...
>
> -=-=-=-=-=-=-=-
> #
> # ? ? ? Example code for a pooled thread file processor
> # ? ? ? NOT EXECUTABLE as is -- there is no code to obtain
> # ? ? ? the list of files to be processed; and the processor
> # ? ? ? just sleeps...
>
> import threading
> import Queue
> import time ? ? ? ? #just for demo sleep
>
> NUMTHREADS = 5
> SENTINAL = object()
>
> workQueue = Queue.Queue()
>
> def fileProc(): ? ? ? ? #function that handles processing of the files
> ? ? while True:
> ? ? ? ? fname = workQueue.get()
> ? ? ? ? if fname is SENTINAL:
> ? ? ? ? ? ? workQueue.put(SENTINAL) ? ?#recycle sentinal for next
> ? ? ? ? ? ? break
> ? ? ? ? print "Processing %s" % fname
> ? ? ? ? time.sleep(3) ? #replace with real file processing
>
> threadList = []
> for ti in range(NUMTHREADS): ? ?#create worker threads
> ? ? t = threading.Thread(target=fileProc)
> ? ? t.start()
> ? ? threadList.append(t)
>
> for fn in listOfFiles: ?#queue up the file names to be worked
> ? ? workQueue.put(fn) ? #need to expand to include how names are
> ? ? ? ? ? ? ? ? ? ? ? ? #obtained
>
> workQueue.put(SENTINAL) #signal that no more files are to be worked
>
> for t in threadList:
> ? ? t.join() ? ? ? ? ? ?#wait for each thread to exit (ensures main
> ? ? ? ? ? ? ? ? ? ? ? ? #doesn't exit before all threads finish
> processing
>
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Thanks for the information!  I can definitely see what you're talking
about, and the Exception is only "pass" right now while I am working
on the code.

However, it does process every file (it doesn't skip the second one),
and I'm guessing that this is because it loops so many times?  I guess
that means I am successful in spite of myself!  ;-)  (This wouldn't be
the first time...  ;-)  )

I REALLY appreciate your insights!!


From myshelter at gmail.com  Sun May  4 05:23:37 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 02:23:37 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
Message-ID: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>

Hello. I'm a complete newbie trying to learn Python. I decided to try
some Tkinter examples, including the one from the library reference,
but they don't seem to do anything! Shouldn't there be, like, a
dialog?

I'm running Windows XP and using IDLE. You can assume my version of
Python is the latest.


From precisionreplicas at gmail.com  Fri May 30 00:37:54 2008
From: precisionreplicas at gmail.com (Best Replica Watches)
Date: Fri, 30 May 2008 12:37:54 +0800
Subject: TAG Heuer replica watches - Fake Watches
Message-ID: <g1o0b2$avl$1@news.cn99.com>

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From george.sakkis at gmail.com  Mon May 26 18:33:20 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 15:33:20 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com> 
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com> 
	<6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>
Message-ID: <d8044516-dc7d-4402-b985-3033fffa4d6c@r66g2000hsg.googlegroups.com>

On May 26, 4:51?pm, notnorweg... at yahoo.se wrote:

> On 26 Maj, 22:16, miller.pau... at gmail.com wrote:
>
> > On May 26, 3:56 pm, notnorweg... at yahoo.se wrote:
>
> > > is the first example here a layer between machine and the second
> > > example?
>
> > My first example was intended to be C, or at least close to it. ?The
> > second example is Python. ?I consider the C snippet to be low-level,
> > while the corresponding Python is high-level. ?There are simply fewer
> > extraneous details for me to worry about at the Python level, and
> > that's why I prefer to work with Python over C when practical.
>
> i know one is C and one i spython, iwas talking more at a conceptual
> level and i know cpython is written in C.
>
> what im asking is can a highlevellanguage be written directly on top
> of the machine or a highlevellanguage is always written on top of a
> lowlevellanguage?

In principle it can be written directly on top of the machine. In
practice it doesn't, for the same reasons we don't build spaceships by
directly gluing molecules together. Civilization as we know it would
be impossible without hierarchical levels of abstraction.

George


From devphyl at gmail.com  Sun May 11 05:17:52 2008
From: devphyl at gmail.com (alefajnie)
Date: Sun, 11 May 2008 02:17:52 -0700 (PDT)
Subject: what does int means for python ?
Message-ID: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>

#!/usr/bin/env python

arr = [[0 for c in range(0, 10)] for r in range(0, 10)]             #
10x10 array

arr[2,3]                 # throws TypeError: list indices must be
integers
arr[int(2), int(3)]     # also throws TypeError: list indices must be
integers !

-------------------------------------------------
what is wrong in above script ?




From beema.shafreen at gmail.com  Thu May 15 05:02:29 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 15 May 2008 14:32:29 +0530
Subject: basic comparing files
Message-ID: <aa405c1f0805150202w3f1dc823wf363512f276f7e93@mail.gmail.com>

hi all,

I have a very basic doubt

I am comparing two files A and B
which has three columns a1, b1 of A and a2, b2
say for example if need to compare a1 with a2 and if there are common i have
display a1, b1, b2
or else i have to display a1 , b1 or a1, b2

is the set function going to be the best option or is there any other way



-- 
Beema Shafreen
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From Thomas.Karolski at googlemail.com  Fri May 23 11:42:50 2008
From: Thomas.Karolski at googlemail.com (Thomas Karolski)
Date: Fri, 23 May 2008 17:42:50 +0200
Subject: Decorator metaclass
In-Reply-To: <3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>
Message-ID: <g16om6$mvb$1@ger.gmane.org>

Thanks for pointing out all those mistakes. I think I'm already starting 
to grasp all of the python magic going on in there.

> Parenthetical: I don't normally recommend this style, since it
> obscures the fact that you're using a custom metaclass to the user.
> That is something the user probably would benefit from knowing, if for
> no other reason than so they can make a mental note about where to
> look first if something goes wrong.  I prefer to make the user use the
> __metaclass__ attribute.

Really just personal preference I think. I'm not really a friend of 
declaring variables if there is a more "intuitive" way.

>> class HBar(Decorator):
>>         def __init__(self, number):
>>                 Decorator.__init__(self)
> 
> Ok, at this point you have to ask yourself what you want to do,
> because the solution you choose will involve trade-offs.

Yes, it was probably a bad example. I decided not to call the Decorator 
's __init__ method in my new version (which I have posted as a reply to 
the reply of Maric Michaud).

> You will note that Decorator does not define __init__.  In fact,
> object.__init__ will be called, which does nothing.  If you think that
> all classes with DecoratorType as their metaclass will be a direct
> subclass of Decorator, you can get away with not calling
> Decorator.__init__ at all.

Now, inside my new version, I have a class which inherits from both 
Decorator and Window, out of which the __init__ for Decorator is not 
called. Does this prove to be a problem?

> Probably the best piece of advice is "Don't try to use Decorator
> pattern".  :)

Well, I decided on the decorator pattern, because I want to be able to 
change the behavior of classes during run-time. I did not really find 
any other pattern which would let me do that.

Regards,
Thomas K.



From ian.g.kelly at gmail.com  Wed May  7 00:04:26 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 22:04:26 -0600
Subject: Can't drag and drop onto .py in Windows XP?
In-Reply-To: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
Message-ID: <3fc761710805062104k26fbac28kc8df5e3cc39f6dcb@mail.gmail.com>

On Tue, May 6, 2008 at 9:12 PM, Sizer <Sizer at nospam.com> wrote:
> I have several python utils that look at sys.argv to get a list of
>  filenames to process and mangle the files in various ways. If I have a
>  bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and
>  bar.bat gets called with foo.avi as an argument, everyone's happy. But if I
>  have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a big
>  NO cursor and nothing happens.
>
>  Now I can work around this by creating a _bar.bat and having the _bar.bat
>  call bar.pyw with the filenames it was passed (this is obviously
>  ridiculous). Or I can create a shortcut which has the target of
>    c:\python25\pythonw.exe c:\mybar\bar.pyw
>  and that works, but makes telling people how to install my utilities on
>  their computer a pain in the rear. It's just a little weird that I can't
>  just drag and drop file names onto .pyw or .py files. Am I missing
>  something here?

I believe the problem is that Windows doesn't view bar.py as an
executable file, but as a data file with an associated launcher.  It's
not smart enough to figure out that when you try to drop a file onto a
.py file, you want it to run python.exe with both the .py file and the
dropped file as arguments.  I don't think there's any way to change
this behavior, but I could be mistaken.


From alex.m.gusarov at gmail.com  Wed May 28 13:34:53 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 00:34:53 +0700
Subject: Struct usages in Python
In-Reply-To: <1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
Message-ID: <ac6dcb3d0805281034k60d9e6b1qedfcb1ad005a0a28@mail.gmail.com>

>  class Event(object):
>
> Always subclass object, unless you have a very compelling reason not to,
> or you are subclassing something else.
>

I've thought that if I write

class Event:
    pass

, it'll be subclass of object too, I was wrong?

--
Best regards, Alex Gusarov


From sandip.more at gmail.com  Tue May  6 02:00:11 2008
From: sandip.more at gmail.com (sandipm)
Date: Mon, 5 May 2008 23:00:11 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
	<ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>
Message-ID: <e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>

Thanks for various useful suggestions.
actually right now I am using conf files only in psp handler of
mod_python/apache
but I have other processes which might use same config files.

One way is I can put conf related data directly in database and
database handling module can directly pickup values from db.
but the problem with that approach is that it is difficult in managing
changes from version control system.as I need to explicitly
create DB scripts to put it in version control and other devs require
them run those scripts.

but if I put those conf params in files it would be easy for me to
change params and useful for other developers
to integrate those changes in their dev environments without doing any
explicit ops.

here I would like to have python file which read conf from text file
and load those params in current process space.
so only importing that python file should read up the conf file and
load the current process with configurable parameters.
I thought this would be good way to do it, rather than getting
involved in slightly complicted reload mechanisms of python modules?



Regards,
Sandip



From deets at nospam.web.de  Tue May 20 09:34:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:34:44 +0200
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
Message-ID: <69g2clF31ttuuU2@mid.uni-berlin.de>

Chuckk Hubbard wrote:

> #!/usr/bin/python
> 
> #why doesn't this run both threads simultaneously?
> #Thanks for any help.
> #Chuckk

Because you should call thread.start().


Diez


From mszpadzik at gmail.com  Fri May 30 03:42:33 2008
From: mszpadzik at gmail.com (Mike)
Date: Fri, 30 May 2008 00:42:33 -0700 (PDT)
Subject: Python threads and memory usage
References: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>
	<n8adnVRcIvt7NKLVnZ2dnUVZ_vSdnZ2d@earthlink.com>
Message-ID: <2baa96da-be9b-493f-8d8f-156a4cce763d@z72g2000hsb.googlegroups.com>

On May 30, 9:16?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Thu, 29 May 2008 12:01:30 -0700 (PDT), Mike <mszpad... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > I observed, that every thread reserved some memory, and after exit
> > thread doesn't freed it. When i leaved my server working for 3 days,
> > then it takes 15% of 512MB memory (during that time about 15000
> > threads were created and stopped). When server starts it only takes
> > about 1% of memory.
>
> ? ? ? ? Do you have any outstanding references to the threads? If so, have
> you performed a .join() with the thread? Until you join it, the thread
> state (thread local objects/"variables") are probably being held for
> access from outside the thread.
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

I'm joining threads only during my program exit. I'll try to do what
You suggest.

THX


From ivan.illarionov at gmail.com  Sun May 25 16:55:07 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 20:55:07 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
Message-ID: <g1cjnb$1p57$1@news.mtu.ru>

On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
[...]
> A quick look at the revision log:
> 
> http://byteflow.su/log/
> 
> reveals that the initial commit of 60 or so files has been done on
> 08/14/07
> (10 months ago), a second developer came on board 12/01/07 (seven+
> months ago),
> a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
> (also
> six+ months ago).  There are at least nine discernible contributors
> overall.
> Say what you will, but it still looks an awful lot like like two man-
> years,
> Django or no Django...

I bet that if they did this with PHP framework they where far from where 
they are now.

I didn't say that it's not possible to write good code in PHP, I said 
that Python and Django encourage cleaner code more than PHP and PHP 
frameworks do. 

IMHO Python language is better designed and this influences everything 
written in it.

Yes, it's possible to write something clean in PHP but it would require a 
lot more work.

Ivan




From larsnostdal at gmail.com  Sat May 10 06:36:38 2008
From: larsnostdal at gmail.com (=?UTF-8?B?TGFycyBSdW5lIE7DuHN0ZGFs?=)
Date: Sat, 10 May 2008 12:36:38 +0200
Subject: implementation for Parsing Expression Grammar?
In-Reply-To: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <48257ab7$0$29576$c83e3ef6@nn1-read.tele2.net>

Hi,
Finite automata works for "nested things".

http://en.wikipedia.org/wiki/Automata_theory

-- 
Lars Rune N?stdal
http://nostdal.org/


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:48:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:48:46 -0300
Subject: Weird bug with an integer
References: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
	<5dc598e30805081847n5e2ed2a5jeb8e8da6263dd11c@mail.gmail.com>
Message-ID: <op.uavg3kxnx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 22:47:59 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> Ps:
> When I go to shell and type:rowN = int(0)

Why int(0)? Why not just 0???

>> Look this slice of code:
>>
>> rowN = int(0)
>>         for row in rows:
>>             success = self.resultGrid.AppendRows();
>>             colN = int(0)
>>             for col in row:
>>                 self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
>> - 1,colN,isReadOnly = True)
>>                 print rowN
>>                 self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>>
>> I am getting this output:
>> 0
>> 0
>> 0
>> 0
>> 0
>> 0
>> 0
>> (1,)
>> Traceback (most recent call last):
>>      in populateGrid
>>     self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>> TypeError: int() argument must be a string or a number, not 'tuple'

Your piece of code doesn't show when and how rowN is changed, it's set as  
0 at the start. Try to see what happens with rowN elsewhere...

-- 
Gabriel Genellina



From stefan_ml at behnel.de  Thu May 22 04:10:43 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 22 May 2008 10:10:43 +0200
Subject: Cython code generation for Py3 complete
Message-ID: <48352a83$0$6547$9b4e6d93@newsspool3.arcor-online.net>

Hi,

just a quick announcement that I finished the port of the Cython compiler to
the Py3 target platform. While you cannot currently run Cython itself in Py3,
you can build the generated C sources unchanged under Py2.3 through 3.0a5.

    http://cython.org/

There isn't a release yet (though there will hopefully be one soon), but I
would be happy if interested people could already give it some testing. So if
you have some Pyrex sources lying around and want them to run on Python 3k,
please give it a try and report any problems you find to the Cython mailing list.

You can get the compiler from the public Mercurial repository:

    http://hg.cython.org/cython-devel/

and I have put up a developer snapshot here:

http://codespeak.net/lxml/dev/Cython-0.9.6.14-3k.tar.gz

Hoping for some feedback,

Stefan


From ivoras at __fer.hr__  Fri May  9 09:54:16 2008
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Fri, 09 May 2008 15:54:16 +0200
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <g01l28$k50$1@news1.carnet.hr>

grbgooglefan wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1
> 
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?

"not" is a perfectly valid boolean operator in Python and means just
what "!" means in C. The equivalent binary operator is "~", just like in C.

>>> print not True
False
>>> print not 1
False
>>> print not 0
True
>>> print ~1
-2
>>> print ~0
-1


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From unknown_hero007 at hotmail.com  Tue May  6 03:48:00 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 00:48:00 -0700 (PDT)
Subject: Scanning through Windows registry...
Message-ID: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>

Hi everyone!

Well, I have this need for a Python script that will scan through a
selected hive (like HKEY_LOCAL_MACHINE) and replace all strings that
contain word xxx (IE. foo) with yyy (IE. moo). I do not want partial
results, but rather complete strings (no foome or the like, just foo).


I have a basic understanding of Python, but this is beyond my skills.

I was looking for something like this:

open key (HKEY_LOCAL_MACHINE)
while (not end of list)
  open next subkey
  search subkey for value (old)
  SetValue(key, subkey, REG_SZ, new)
  close subkey
end while
close key


From me at jonbowlas.com  Mon May 19 07:27:23 2008
From: me at jonbowlas.com (Jon Bowlas)
Date: Mon, 19 May 2008 12:27:23 +0100
Subject: ftplib returns EOFError
Message-ID: <002c01c8b9a3$4fb74dc0$020ba8c0@bowlas>

Hi All,

I've written a little method to connect to an ftpserver which works well,
however when I send a file using this ftp connection oddly I _sometimes_ get
returned an EOFError from ftplib.getline even though my file is actually
transferred. 

Here's my script:

    def uploadViaFtp(self, file, filename):
        '''A method to upload a file via ftp'''
        ftpserverloc = self.getItunesUftpServer()
        ftpserverusername = self.getItunesUftpUser()
        ftpserverpassword = self.getItunesUftpPsswd()
        ftp = ftplib.FTP(ftpserverloc)
        ftp.login(ftpserverusername, ftpserverpassword)
        try:
            ftp.storbinary("STOR " + filename, file, 1024)
        finally:
            file.close()
        ftp.quit()


And here's the traceback:
Traceback (innermost last):
  Module ZPublisher.Publish, line 114, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 40, in call_object
  Module Products.FileSystemSite.FSPythonScript, line 108, in __call__
  Module Shared.DC.Scripts.Bindings, line 311, in __call__
  Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
  Module Products.FileSystemSite.FSPythonScript, line 164, in _exec
  Module None, line 28, in upload_submit
   - <FSPythonScript at
/silva/service_views/UCLItunesUPodcast/edit/Asset/UCLItunesUTrack/upload_sub
mit>
   - Line 28
  Module Products.UCLItunesUPodcast.UCLItunesUService, line 138, in
uploadViaFtp
  Module ftplib, line 523, in quit
  Module ftplib, line 246, in voidcmd
  Module ftplib, line 221, in voidresp
  Module ftplib, line 207, in getresp
  Module ftplib, line 193, in getmultiline
  Module ftplib, line 183, in getline
EOFError


Any help in catching and ignoring this error would be greatly appreciated.

Regards

Jon



From dwblas at gmail.com  Sat May  3 13:55:59 2008
From: dwblas at gmail.com (dwblas at gmail.com)
Date: Sat, 3 May 2008 10:55:59 -0700 (PDT)
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
	<mailman.418.1209661511.12834.python-list@python.org>
Message-ID: <fa1d76a8-1144-48e6-bdf6-62e7cd1ea79b@b9g2000prh.googlegroups.com>

On May 1, 10:04 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "jmDesktop" <needin4mat... at gmail.com> wrote in message
> |
> | s = 'abcde'
> | i = -1
> | for i in range (-1, -len(s), -1):
> |    print s[:i], i
> | Why doesn't the first one have the e if -1 is the end of the list?

That should be obvious.  'print s[-1]' will yield the "e", but your
code is using slicing, s[:i], not printing elements from a list.  Your
code starts with the value s[:-1], which is exactly the same as
s[0:-1], so you print the string from 0 to -1 which omits the last
letter.  The next time it omits the last 2 letters s[:-2].  As already
stated, that should be very obvious.  Also, if you want a response in
the future, make your code readable.  That means not using, "i", "l",
or "o" as variable names.  They look too much like numbers and some
people won't waste their time trying to distinguish between them.
There are 23 other letters that work just a well.


From sven.siegmund at gmail.com  Mon May 12 14:05:32 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Mon, 12 May 2008 11:05:32 -0700 (PDT)
Subject: Cannot run Python 3.0a5 )-:
References: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
Message-ID: <aae04ea3-cea0-45ee-87ad-f74e7c0e0808@34g2000hsh.googlegroups.com>

Ah, I solved it. I was wrong. I did not do the same as yesterday.
Yesterday I downloaded Python 3.0a5 from http://www.python.org/ftp/python/3.0/python-3.0a5.msi
and not the daily build.

I can python again now (-:

S.


From jgodoy at gmail.com  Mon May 19 07:14:16 2008
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 19 May 2008 08:14:16 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<slrng32e0q.egt.hat@se-162.se.wtb.tue.nl>
Message-ID: <r848g5-o82.ln1@strongwill.g2ctech>

A.T.Hofkamp wrote:

> Also, why do you make a distinction between shared and non-shared code?
> You could simply eliminate 'shared' directory, and put its contents
> directly under myproject.

I would go further and make them individual projects, with their own version
control, code repository and then install them as eggs using setuptools.

This has been working fine for me in some projects and has the advantage of
being reusable in different big projects.

Also, using setuptools on each big project I don't have to worry with
dependencies because it downloads and installs everything to me when I
install the main project.

>> Is there a way to set this up that is a bit more self contained? For
>> example, at first I was somewhat hopeful that Python could ascend
>> parent directories until it reached a directory that did not include
>> an __init__.py file, and it could use this as a root for referring to
>> packages and modules from any file contained within. (e.g. in the
>> example project above, any file could refer to myproject.shared.mylib1
>> so long as 'myproject' and all subdirectories contained an
>> __init__.py, and the parent of 'myproject' didn't contain such a
>> file). Evidently this is not the case, but it seems like it could be a
>> useful feature in these situations.

Eggs would solve that as well.  They would behave like any other
installed "library" on your system.

-- 
Jorge Godoy      <jgodoy at gmail.com>



From castironpi at gmail.com  Mon May 12 01:27:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 22:27:40 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
	<875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com> 
	<e1ba669d-f62d-42fb-811c-227351d030de@26g2000hsk.googlegroups.com>
Message-ID: <6635579f-d89e-4b93-9a6a-96935842013e@56g2000hsm.googlegroups.com>

On May 11, 6:21?pm, krustymon... at gmail.com wrote:
> On May 8, 7:29 pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 8, 4:35 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
> > > Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > > > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> > > >> The thing is, I'm not using slots by choice. ?I'm using the standard
> > > >> lib "socket" class, which apparently uses slots.
>
> > > > `socket` objects can't be pickled. ?Not just because of the
> > > > `__slot__`\s but because a substantial part of their state lives in
> > > > the operating system's space.
>
> > > Of course, if it makes sense to pickle sockets in the application, one
> > > is can do so by defining __getstate__ and __setstate__:
>
> > > class Connection(object):
> > > ? ? def __init__(self, host, port):
> > > ? ? ? ? self.host = host
> > > ? ? ? ? self.port = port
> > > ? ? ? ? self.init_sock()
>
> > > ? ? def init_sock(self):
> > > ? ? ? ? self.sock = socket.socket()
> > > ? ? ? ? self.sock.connect((host, port))
> > > ? ? ? ? ... init communication ...
>
> > > ? ? def __getstate__(self):
> > > ? ? ? ? # pickle self as a (host, port) pair
> > > ? ? ? ? return self.host, self.port
>
> > > ? ? def __setstate__(self, state):
> > > ? ? ? ? # reinstate self by setting host and port and
> > > ? ? ? ? # recreating the socket
> > > ? ? ? ? self.host, self.port = state
> > > ? ? ? ? self.init_sock()
>
> > I, local, am mystified that you'd want to pickle a socket. ?It's a
> > live connection, which flies on a pocket dollar. ?You don't want it on
> > disk, do you?
>
> > If you're running a net buoy through a cluster somewhere, do you want
> > to drop a server and reconnect? ?Is Amazon's EC2 up and running?
>
> > Certainly no one was talking on the internet. ?Were you?
>
> > I don't think you hit anything but banks surfing the web, and the
> > American dollar is notoriously stuffy. ?Pump a wi-fi to a diner,
> > though, and you're just talking more. ?Where's Usenet?
>
> The idea is a pre-fork socket server. ?What I want to do is fork off
> some child processes from the parent and use IPC to send the
> connection object (via socket.accept()) over a pipe to one of the
> preexisting child processes and have said child handle the
> transaction. ?Think Apache, if you want an example of what I'm trying
> to do here. ?This alleviates the process startup cost that occurs when
> you fork. ?If the socket object can't be serialized, is there another
> way to go about handling this in python?- Hide quoted text -
>
> - Show quoted text -

That's out of my expertise.  You would have to either hack it on a
router you are running (masquerade), or choose a different family of
sockets.  For HTTP, you could issue a 'reroute' return.  Just multi-
thread your server process.


From bignose+hates-spam at benfinney.id.au  Mon May 19 21:21:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 May 2008 11:21:00 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <87y765hitf.fsf@benfinney.id.au>

James A. Donald <jamesd at echeque.com> writes:

> I am just getting into python, and know little about it

Welcome to Python, and this forum.

> and am posting to ask on what beaches the salt water crocodiles hang
> out.

Heh. You want to avoid them, or hang out with them? :-)

> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable,

This seems quite a non sequitur. How do you see a connection between
these properties and "will not scale to large programs"?

> so the interpreter fails to catch typos and name collisions.

These errors are a small subset of possible errors. If writing a large
program, an automated testing suite is essential, and can catch far
more errors than the compiler can hope to catch. If you run a static
code analyser, you'll be notified of unused names and other simple
errors that are often caught by static-declaration compilers.

> I am inclined to suspect that when a successful small python program
> turns into a large python program, it rapidly reaches ninety percent
> complete, and remains ninety percent complete forever.

You may want to look at the Python success stories before suspecting
that, <URL:http://www.python.org/about/success/>.

> 2.  It is not clear to me how a python web application scales.

I'll leave this one for others to speak to; I don't have experience
with large web applications.

-- 
 \         "I was gratified to be able to answer promptly and I did. I |
  `\    said I didn't know."  -- Mark Twain, _Life on the Mississippi_ |
_o__)                                                                  |
Ben Finney


From fc14301589 at icqmail.com  Sat May 31 07:23:41 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sat, 31 May 2008 19:23:41 +0800
Subject: File browser in python gui
Message-ID: <4841353e_1@news.tm.net.my>

hi there,

I've started to build a GUI for my Mailsweeper by the help of QT4 Designer.
I came across the problem that there isn't any prebuild file browser like
Kdialog.
I know some other sample, but PyGTK builded. I'm not happy to use a different
widget set or to have to design my own file browser with QT4 widgets. 
It's almost thousand times people need to use such browser, I wonder why I
couldn't find one on the entire day searching on web site.
A QT XML file (.ui extension) should do fine, if someone would help :)

-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From monica.leko at gmail.com  Sun May 18 09:36:28 2008
From: monica.leko at gmail.com (Monica Leko)
Date: Sun, 18 May 2008 06:36:28 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
Message-ID: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>

On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> You want your file considered as a sequence of bits rather
> than a sequence of 8-bit bytes, do you?

Yes.

> is the 10-bit
> bit-pattern to be stored at an arbitrary bit-position in
> the file

Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
sequence of bytes, than 10 bits again, etc.




From greg at cosc.canterbury.ac.nz  Tue May 13 03:48:10 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 13 May 2008 19:48:10 +1200
Subject: ANN: Pyrex 0.9.7.1
Message-ID: <mailman.1033.1210668518.12834.python-announce-list@python.org>

Pyrex 0.9.7.1 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

This version fixes a bug in the new integer indexing
optimisation which causes indexing of a non-sequence type
with a C int to fail with a TypeError.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From hniksic at xemacs.org  Wed May 28 03:30:27 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 28 May 2008 09:30:27 +0200
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
Message-ID: <87od6qrilo.fsf@mulj.homelinux.net>

Gary Herron <gherron at islandtraining.com> writes:

> mydict[(0,"person","setTime")] = "12:09:30"
> mydict[(0,"person","clrTime")] = "22:09:30"

Note that this is more succinctly written as:

    mydict[0, "person", "setTime"] = "12:09:30"

with the added advantage that it looks like a multi-dimensional array.
:-)

The only problem with this approach is that when you want to iterate
over, say, mydict[0], or mydict[0]["person"], it's not possible
without traversing the entire dict.


From roy at panix.com  Sun May 25 10:13:18 2008
From: roy at panix.com (Roy Smith)
Date: Sun, 25 May 2008 10:13:18 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>
Message-ID: <roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>

In article 
<f838bc64-a4ef-4770-b139-01284e0f846c at t54g2000hsg.googlegroups.com>,
 John Roth <johnroth1 at gmail.com> wrote:

> I really don't care what the OP does in his own projects. My objection
> is that, if it goes into the standard library, is that it passes a
> signal that it's good practice to allow dependencies between tests. It
> most definitely is _not_ good practice.

The OP stated that he wants the tests run in a given order.  People are 
assuming that's because he has dependencies between his tests.  Maybe he 
just wants them run in order because it's easier to understand the output 
in a certain order.

For example, I'm currently working on some low-level data marshalling code 
(in another language).  This is the sort of stuff which the Python struct 
module handles -- converting between internal form and network 
representation.  

There is a logical hierarchy of complexity.  Handling characters is easier 
than handling ints, which is easier than floats, which is easier than 
doubles, and so on (arrays, sets and other composite types).  If I was 
porting this to a new platform, I would want the unit tests to run in a 
logical order of simple to complex.  If some assortment of tests failed, 
you want to start debugging the problem on the least complex data types.  
If the tests run in a specific order, it's easier to see where to start.

It's not that any test depends on any other test to run, in the sense that 
there's some shared state between them.  It's just that from a human 
factors point of view, there's a logical order to run them in.

In fact, from a protocol point of view, some of the types really do depend 
on each other.  We send counted strings, for example, so we can't send a 
string until we know how to send an int (for the string length).  If the 
first test that fails is the string test, I know right off that the problem 
is not in how we send ints, because that test ran already and it passed.

Earlier, I gave another example of wanting tests to be run in the same 
order as some externally controlled set of functional requirements.  Again, 
not because the tests have inter-dependencies, but because it just makes it 
easier to interpret the results.

Don't assume inter-test dependencies (which I agree are a Bad Thing) is the 
only reason you want to run tests in a specific order.


From gagsl-py2 at yahoo.com.ar  Sun May  4 01:21:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 02:21:59 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
Message-ID: <op.ual6ixxxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> escribi?:

> On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
>> I'm actually curious if there's a way to write a generator function
>> (not a generator expression) in C, or what the simplest way to do it
>> is... besides link the Python run-time.
>
> The reference implementation of Python is written in C, so obviously there
> must be a way to write something like generators in C.

Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
See this thread http://groups.google.com/group/comp.lang.python/browse_thread/thread/5f42f72f2d0e88fc/

-- 
Gabriel Genellina



From cjw at ncf.ca  Thu May  8 09:39:04 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 09:39:04 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <fvut8a$b67$1@theodyn.ncf.ca>
References: <fvut8a$b67$1@theodyn.ncf.ca>
Message-ID: <fvuvpq$cc2$1@theodyn.ncf.ca>

Colin J. Williams wrote:
> 
> The readme.txt has:
> 
> All you need to do is open the workspace "pcbuild.sln" in Visual Studio,
> select the desired combination of configuration and platform and eventually
> build the solution. Unless you are going to debug a problem in the core or
> you are going to create an optimized build you want to select "Release" as
> configuration.
> 
> Unfortunately, the Express Edition (Free) doesn't handle "solution" files.
> 
> Installed Edition: VC Express
> 
> Microsoft Visual C++ 2008 91909-152-0000052-60812
> Microsoft Visual C++ 2008
> 
> 
> Does anyone have any advice for a person who has limited C++ experience 
> and none with the Visual C++ please?
> 
> Colin W.

Please ignore the request above.

In spite of the above message the 
program appears to build and execute OK 
for 2.6a2
Now I have to find where the executable 
has been placed.

Colin W.


From gherron at islandtraining.com  Tue May 13 11:35:10 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 08:35:10 -0700
Subject: looking for a pdf module
In-Reply-To: <4829C0B8.9090605@admailinc.com>
References: <4829C0B8.9090605@admailinc.com>
Message-ID: <4829B52E.6060903@islandtraining.com>

Ethan Furman wrote:
> Greetings!
>
> I'm hoping to be able to generate pdf files on the fly -- are there 
> any python modules out there to do that?
>
> All help appreciated!
> --
> Ethan
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
ReportLabs is a quite extensive open-source project for generating PDF 
files.

    http://www.reportlab.org/

Enjoy,

Gary Herron


From jcd at sdf.lonestar.org  Fri May 30 12:01:55 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 30 May 2008 12:01:55 -0400
Subject: help
In-Reply-To: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>
References: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>
Message-ID: <1212163315.3310.15.camel@aalcdl07.lib.unc.edu>

Take a look at django's built in pagination features:

http://www.djangoproject.com/documentation/generic_views/

http://www.djangoproject.com/documentation/pagination/

Also, take a look at the django specific mailing list.
django-users at googlegroups.com

Cheers,
Cliff

On Fri, 2008-05-30 at 12:59 +0000, ha bo wrote:
> hi 
> i wanna paginate my table (x lines per pages),the size of my table is
> changing according to the user.
> i wanna know if paginator.py can help me ,if yes how?
> some one can help me 
> ps:i use django
> thank you 
> 
> 
> 
> ______________________________________________________________________
> Tous vos amis discutent sur Messenger, et vous ? T?l?chargez
> Messenger, c'est gratuit !
> --
> http://mail.python.org/mailman/listinfo/python-list



From steve at holdenweb.com  Thu May  1 15:41:45 2008
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 01 May 2008 15:41:45 -0400
Subject: Python Wins "Favorite Scripting Language" Award
Message-ID: <mailman.466.1209746882.12834.python-announce-list@python.org>

The Linux Journal readers apparently suffer the same ambiguity as the 
rest of us when it comes to defining what the difference between a 
scripting language and a programming language.

They do, however, clearly like Python, which they voted their scripting 
language of 2008. PHP, Bash and Perl came in reasonably close on 
Python's heels, but 28.9% of those voting voted for Python.

See all the awards at

   http://www.linuxjournal.com/article/10065

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/



From aisaac at american.edu  Thu May  8 17:57:10 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 21:57:10 GMT
Subject: observer pattern question #1 (reference to subject)
In-Reply-To: <k5i4cyb3.fsf@gmail.com>
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
	<JGIUj.52528$Bb3.41853@trnddc01> <k5i4cyb3.fsf@gmail.com>
Message-ID: <WGKUj.8780$0L.8138@trnddc07>

Ville M. Vainio wrote:

> in case of stocks, you are probably monitoring several 

> stock objects, so the stock should probably pass itself to 

> the observer



OK.  This is related to my question #2 (in a separate 

thread), where I'd also appreciate your comments.





> analogous to a typical UI scenario where you have several 

> widgets forwarding events to one big observer - and they 

> *do* provide the event source and event type. 



That is a helpful comparison.





> All in all, though, the right solution should be obvious 

> from the problem at hand. 



For CS types, maybe.  The rest of us are just trying to get 

things done without as much background and context.



Thanks,

Alan




From cokofreedom at gmail.com  Fri May  9 03:45:43 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Fri, 9 May 2008 00:45:43 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
Message-ID: <0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>

>>> key = ''.join(sorted(word))

I tend to strip and lower the word as well, otherwise "Hello" and
"hello" do not compare...depends on what you want though!
Plus you might get a lot of "word\n" as keys...

My technique is the this way

def anagram_finder(words):
    anagrams = {}
    for word in words:
        word = word.strip()
        key = ''.join(sorted(word.lower()))
        anagrams.setdefault(key, []).append(word)
    return anagrams


From zephyrfalcon!NO_SPAM! at gmail.com  Thu May 22 15:44:50 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Thu, 22 May 2008 15:44:50 -0400
Subject: 2 different versions of python compiling files.
In-Reply-To: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
Message-ID: <l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>

TkNeo wrote:
> I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> be upgraded. Can you guys tell me if this scenario is possible.
> 
> 1. Any machine that uses .py files that use libraries that require 2.4
> will have 2.4 on it.
> 2. rest of the machines will have 2.3
> 
> now there is a shared drive. lets say i write a new library called
> testlib.py and put it on the shared drive .. when a script uses it
> from a 2.4 based machine, it will generate a testlib.pyc and leave it
> on the shared drive. going forward that .pyc is used until the
> original lib is changed. now lets say a 2.3 based machine is trying to
> use that lib. it will try to use that pyc file which was compiled by
> py2.4. will it work or crash ?

It should work, as long as the original .py file is still there.  Each Python 
version will check for a .pyc file *corresponding to that version* (e.g. Python 
2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't 
exist, overwriting any existing .pyc file in the process.

If the original .py file is *not* there, it will most likely not work.  If you 
try to import a .pyc file with the wrong version number, you get something like 
this:

 >>> import foo
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ImportError: Bad magic number in foo.pyc

I'm not sure what would happen if multiple Pythons try to write a .pyc file at 
the same time, though...

-- 
Hans Nowak (zephyrfalcon at gmail dot org)
http://4.flowsnake.org/


From akeppke at web.de  Wed May 21 06:24:31 2008
From: akeppke at web.de (akeppke at web.de)
Date: Wed, 21 May 2008 03:24:31 -0700 (PDT)
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <fc101c41-18c8-45ac-bf8c-a5f368a90d1b@d1g2000hsg.googlegroups.com>

Use

    for i in dir(x):
        print i                # name of member as string
        print getattr(x, i)    # member

regards

    Arno


On 21 Mai, 09:54, m... at pixar.com wrote:
> I want to iterate over members of a module, something like:
>
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
>
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?
>
> Many TIA!
> Mark


From mishok13 at gmail.com  Tue May 13 12:57:10 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 13 May 2008 19:57:10 +0300
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>

You sound like a commercial. Is this your way of attracting costumers of FT?

2008/5/13 Dave Parker <daveparker at flamingthunder.com>:
> > 5-10 times faster for what kind of code?
>
>  Mostly numerical analysis and CGI scripting.  All of Flaming Thunder's
>  library code is in assembly language, and Flaming Thunder creates
>  statically-linked pure syscall CGI scripts.
>
>  > I don't see anything that resembles OO features of python, ...
>
>  True.  But in Python, you don't see statically-linked pure-syscall CGI
>  scripts being cross-compiled under Windows for ftp'ing up to a Linux
>  server.  And you don't see the speed of pure assembly language
>  libraries.

I see your assembly language libraries and raise you C language libraries. :)
Python libraries have the speed of pure C language libraries. And
while programs and libraries written in assembly may be twice as fast
as programs and libraries written in C, they're real hell to maintain.
But that doesn't stop you from telling us, that:

>  And I'll be willing to bet that Flaming Thunder will have
>  OO features similar to Python before Python has the features that
>  Flaming Thunder already does.
>

Well, we'll see. But, IMHO, this is highly unlikely.


>  For many people, being 5 to 10 times faster at numerical analysis and
>  CGI scripting is reason enough to pay $19 per year.  But maybe for
>  other people, having slow, inefficient programs and websites is
>  acceptable.

Yeah, right, Python is sooooo slow. :) Show us some sites and programs
that were written in FT.

>
>
>  > And what is really expensive is brain-cycles, not cpu-cycles.
>
>  Depends on whether you're the programmer, or the customer.  I've found
>  that customers prefer products that are 5 to 10 times faster, instead
>  of products that were easy for the developer.

If I'm customer, than why should I care about FT?
If I'm a programmer, I'd better care about brain-cycles.

>
>  And I disagree that Flaming Thunder requires more brain-cycles.
>  Because it's based on leveraging existing English and math fluency
>  (which was one of the original goals of Python, was it not?), I think
>  that Flaming Thunder requires fewer brain-cycles because fewer brains
>  cells have to be devoted to memorizing language peculiarities.

Not everybody has grown in English-speaking community, you know. And
knowing math quite good, I prefer writing "x = y" instead of "Set x to
y".

>
>
>  > Let alone it is
>  > very much a question of view-point if two different looping constructs or
>  > keywords are more awkward than one general looping-concept with only one
>  > keyword. It's a matter of taste.
>
>  Perhaps.  But if elementary school students can easily understand why
>  one programming language gives the answer 100 (Flaming Thunder):
>
>   Write 10^2.
>
>  but can't understand why another programming language gives the answer
>  8 (Python):
>
>   Print 10^2
>
>  then I think the comparison moves beyond a matter of taste into the
>  realm of measurable ease-of-use.

'^' is a bitwise XOR. Python uses "x**y" for raising x to power of y.
What's your point here?

>
>
>
>  On May 13, 9:50 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>  > > Also, several users have rewritten their Python programs in Flaming
>  > > Thunder, and found that Flaming Thunder was 5 to 10 times faster
>  > > (Flaming Thunder compiles to native executables).  So again, since
>  > > many people value their time at more than $0, I think that many people
>  > > will find that Flaming Thunder is worth $19.95 per year.
>  >
>  > 5-10 times faster for what kind of code? I don't see anything that resembles
>  > OO features of python, let alone more advanced concepts like
>  > meta-programming, higher-order functions and such. Which save tremendous
>  > amounts of time coding. If FT grows these and *still* is 5-10 times faster,
>  > I'll salut you.
>  >
>  > And what is really expensive is brain-cycles, not cpu-cycles. Which above
>  > described features save.
>  >
>  > > Plus, me getting paid to work on Flaming Thunder is far more
>  > > motivating than me not getting paid to work on Python.  This weekend,
>  > > Python users will still be debating how to fix awkwardnesses in the
>  > > languages (such as FOR loops where you're just counting the loops and
>  > > not referencing the loop variable) -- but Flaming Thunder users will
>  > > be getting work done using the REPEAT n TIMES constructs that I'll be
>  > > implementing.
>  >
>  > > Python has been around about 15 years, yet still has those
>  > > awkwardnesses.  Flaming Thunder has been out less than 6 months and
>  > > those awkwardnesses are already getting fixed.  The difference: I
>  > > can't afford to ignore users.
>  >
>  > Oh *please*! Try getting nearly as feature & library complete as python is
>  > today - and *then* I'll point to all the akwardness of FT. Let alone it is
>  > very much a question of view-point if two different looping constructs or
>  > keywords are more awkward than one general looping-concept with only one
>  > keyword. It's a matter of taste.
>  >
>  > Diez
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From vivainio at gmail.com  Thu May  8 16:53:37 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 08 May 2008 20:53:37 GMT
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
	<JGIUj.52528$Bb3.41853@trnddc01>
Message-ID: <k5i4cyb3.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:

> the following: "OK, here's the pattern, now your listener
> wants to know the event source, do not ask something new the
> subject to respond to that need.  That is unnecessary
> coupling.  Instead, just rewrite your listener to maintain
> a reference to the subject."
>
> Do I have that right?

Not really. It has to be determined case-by-case. Note that I'm not
arguing *for* not passing "subject" on notification, just trying to
elaborate on situations that might want to choose that route.

> It seems to me that this response begs the question.
> That is, an appropriate reply seems to be: here is a related
> pattern, call it observer2.  In the observer2 pattern, the
> subject has a getState method and always passes itself when
> it notifies the observer. Now: in what sense does this
> require closer coupling?

It creates stronger connection between the subject and observer,
thereby reducing the amount different of places that can call the
observer (I don't mean different stock, but altogether different
places - say, a central stock controller that can broadcast the change
in several stocks at the time by stock id, once per second).

This is not really a feature of the observer pattern, both approaches
are somewhat valid observer patterns, depending on problem domain. If
you think it makes sense in the first place to have ONE reference to
the subject in observer, it's probably a workable approach - but in
case of stocks, you are probably monitoring several stock objects, so
the stock should probably pass itself to the observer (so that you
don't need to check all stocks every time something changes!).

Of course this stock thing is a bad example for this case, because you
have several stocks per investor. It's analogous to a typical UI
scenario where you have several widgets forwarding events to one big 
observer - and they *do* provide the event source and event type.

> Or to put it a different way, your suggestion that the
> investors should have to *pull* this information from the
> stocks seems out of step with the observer pattern, where
> the stocks should be pushing this information to the
> investor.

It's not necessarily the observer that has the interesting
information. It's quite typical to have general "catch-all"
notifications than report observers that "something has
chanced somewhere, so you should refresh your data". 

All in all, though, the right solution should be obvious from the
problem at hand.


From bellman at lysator.liu.se  Sat May 10 05:45:42 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Sat, 10 May 2008 09:45:42 +0000 (UTC)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <g03qs6$rbg$1@news.lysator.liu.se>

Jean-Paul Calderone <exarkun at divmod.com> wrote:

>                    (Ctrl+Z which sends SIGSTOP and _cannot_ be masked
> or otherwise ignored)

Bzzt!  Ctrl-Z causes a SIGTSTP to be sent, not SIGSTOP, and
SIGTSTP can be both caught, ignored and masked.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"You cannot achieve the impossible without   !  bellman @ lysator.liu.se
 attempting the absurd."                     !  Make Love -- Nicht Wahr!


From bronger at physik.rwth-aachen.de  Thu May  1 13:45:35 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 19:45:35 +0200
Subject: Problems with Cheese Shop
Message-ID: <87zlr9vry8.fsf@physik.rwth-aachen.de>

Hall?chen!

How can I authorise to the Python Cheese Shop in order to use
setup.py upload?  Currently, I get

Upload failed (401): You must be identified to edit package information

Thanks!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From efurman at admailinc.com  Thu May 15 13:40:21 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 15 May 2008 09:40:21 -0800
Subject: cgitb performance issue
In-Reply-To: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>
References: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <482C7585.4090109@admailinc.com>


Gabriel Genellina wrote:

> En Wed, 14 May 2008 13:51:40 -0300, Ethan Furman 
> <efurman at admailinc.com>  escribi?:
>
>> Gabriel Genellina wrote:
>>
>>> En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman  
>>> <efurman at admailinc.com> escribi?:
>>>
>>>> I tried adding a form to our website for uploading large files.
>>>> Personally, I dislike the forms that tell you you did something wrong
>>>> and make you re-enter *all* your data again, so this one cycles and
>>>> remembers your answers, and only prompts for the file once the rest of
>>>> the entered data is good.  However, the first time the form loads 
>>>> it  can
>>>> take up to 30 seconds... any ideas why?
>>>
>>>
>>> Hard to tell without looking at the code... And what has cgitb to 
>>> do  with this?
>>>
>> Hmmmm... excellent question, and the answer is -- Nothing.  My
>> apologies.  I'm importing cgi (cgitb was while I was debugging it), as
>> well as a bunch of others.
>>
>> Here's the source, with a bunch of the actual html stripped out.  The -u
>> as well as the last two lines were an attempt to eliminate the 30-second
>> pause while it loads, as it seems to get all data transferred, then just
>> waits for a while.  Any ideas appreciated.  My apologies for the 
>> ugly  code.
>
>
> *When* do you see the 30-secs delay? After uploading the files? I see  
> they're transferred using SMTP, but I think you're not talking about 
> the  time it takes to send the mail.
> I'd use the old-fashioned "print" statement to see *what* gets 
> executed  and how long it takes each step.

The initial load of the page in question is a static html page (done as 
a crutch so there's *something* on screen while the rest of the thing 
loads).  After five seconds the static html page redirects to the python 
cgi script -- and that's where the delay occurs.  I just double checked, 
and it also occurs everytime it has to reload the script.  I'll try the 
print statements and see if I can narrow down where the bottleneck is 
located.  The sending of the file via smtp happens on our server after 
the file has been uploaded, the delays are happening long before that.  
Thanks for your help!
--
Ethan



From danb_83 at yahoo.com  Thu May  8 23:54:59 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 20:54:59 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
Message-ID: <c45e0065-0ceb-4f72-b267-c63fb128962d@p25g2000pri.googlegroups.com>

On May 8, 10:42?pm, yhvh <yhvh2... at googlemail.com> wrote:
> I want to generate a range with variable leading zeros
>
> x = [0010, 0210]

You do realize that this is octal, right?

> padding = len(x[1])

len is undefined for integers.  Perhaps you meant "len(str(x[1]))".

> for j in range(x[0], x[1]):
> ? ? print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}
>
> This is syntactically incorrect, you can't insert a variable into the
> string format options. Any ideas?

You can, however, do this:

>>> '%0*d' % (5, 123)
'00123'


From arnodel at googlemail.com  Wed May 28 13:53:41 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 18:53:41 +0100
Subject: Struct usages in Python
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com>
Message-ID: <m2bq2q48nu.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> "Alex Gusarov" <alex.m.gusarov at gmail.com> writes:
>
>>>  class Event(object):
>>>
>>> Always subclass object, unless you have a very compelling reason not to,
>>> or you are subclassing something else.
>>>
>>
>> I've thought that if I write
>>
>> class Event:
>>     pass
>>
>> , it'll be subclass of object too, I was wrong?
>
> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>
> What you define with the statement
>
>     class Event: pass
>
> is an 'old-style' class.  Witness:
>
>     >>> class Event: pass
>     ... 
>     >>> class NewEvent(object): pass
>     ... 
>     >>> type(Event)
>     <type 'classobj'>
>     >>> type(NewEvent)
>     <type 'type'>
>     >>> type(Event())
>     <type 'instance'>
>     del>>> type(NewEvent())
>     <class '__main__.NewEvent'>
>
> All old-style classes are actually objects of type 'classobj' (they
> all have the same type!), all their instances are all of type 'instance'.

Oops somthing disappeared in the copy/paste process:

    >>> class FooBar: pass
    ...

>     >>> type(FooBar) == type(Event)
>     True
>     >>> type(FooBar()) == type(Event())
>     True
>
> Whereas instances of new-style classes are of type their class:
>
>     >>> class NewFooBar(object): pass
>     ... 
>     >>> type(NewFooBar) == type(NewEvent)
>     True
>     >>> type(NewFooBar()) == type(NewEvent())
>     False
>
> However, in python 2.X (X > 2?), you can force all classes to of a
> certain type by setting the global variable '__metaclass__'. So:
>
>     >>> type(Event) # Event is an old-style class
>     <type 'classobj'>
>     >>> __metaclass__ = type
>     >>> class Event: pass
>     ... 
>     >>> type(Event) # Now Event is new-style!
>     <type 'type'>
>
> HTH
>
> -- 
> Arnaud


From fetchinson at googlemail.com  Mon May  5 16:27:38 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 5 May 2008 13:27:38 -0700
Subject: psycopg2 ReferenceManual
In-Reply-To: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
References: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
Message-ID: <fbe2e2100805051327m670f66fl28e69248f8d948c5@mail.gmail.com>

> Hi all, where can I find the reference manual from the psycopg2 or the
> dbapi2.0 because in their official pages I could'nt find
> thx
>
>

Once you have the source of any package you can create a reference manual
using e.g. epydoc.
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From larzluv at hotmail.com  Mon May 12 02:52:20 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 23:52:20 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
Message-ID: <b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>

On May 11, 11:42 pm, Larry Hale <larz... at hotmail.com> wrote:
> THANKS, AGAIN, for the reply!  :)
>
> Okay, now I -really- feel silly...  :>
>
> So, when I was going to try what you'd suggested, I noticed something
> peculiar: I hadn't "changed" anything on my system, but now, when I
> tried to "import magic" I got a missing DLL error.  For a DIFFERENT
> DLL!  This got me to thinking...
>
> Turns out, when I was having "success" earlier, I was -in- the C:
> \Program Files\GnuWin32\bin directory (where file.exe and related .dll
> files are).
>
> So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
> PATH.  Everything worked.  I removed all the copious copies of the
> DLL, the magic files, etc., littering my hard drive in every other
> location.  Still worked.
>
> 'Course, I don't honestly know why it didn't work with the files
> copied to other locales contained in the sys/Py paths... perhaps it
> was, as you mentioned, wanting the tree-structure to be the same?  (I
> haven't the heart to check this out fully right now... *maybe* at a
> later time...  ;) )
>
> Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
> THAT... you know, all the "obvious"/"I've been programming/working in
> computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
> 'hacker'..." stuff.  I -swear-!
>
> [EGG ON FACE]
>
> [SIGH]  Well, I'd say "live and learn", but I'm still scratching my
> head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
> off to work _with_ the module now, then work-up my HowTo (and
> experiment with making an "egg"?? ;) )...
>
> Caio!
> -Larry  :P  :)
>
> On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
>
> > Larry Hale wrote:
> > > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > > file... still no-go.  :/
>
> > It's often the custom of programs ported from unix to windows to use the
> > dll location as a key to find the other files that are typically in
> > share, or etc.  GTK, for example uses ../share and ../etc from the
> > location where the dlls are stored (if the dlls are in a folder called bin).
>
> > In this case I'd try making a folder in the Python25 folder called
> > "share" and put the contents of the gnuwin32 share/file stuff in there.
> >  Should look something like this:
>
> > c:/python25/share/file/magic.mime.mgc
> > c:/python25/share/file/magic
> > c:/python25/share/file/magic.mgc
> > c:/python25/share/file/magic.mime
>
> > Or, judging by a string I found in the dll itself, you might have to put
> > the files here:
>
> > c:/progra~1/File/share/file/magic
>
> > Although if such a path really is hardcoded into the dll, this is
> > certainly a bug, since it will fail on certain non-english windows systems.
>
> > Anyway, who knows.  Give these options a try.



UPDATE: HOORAY!!!  Well, actually, was about two steps forward, one
back.  But I've gotten it all sorted out now!  :)

I added C:\Program Files\GnuWin32\bin to the system/Windows PATH.
This takes care of the various required DLLs/libs.

The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
has the man pages.  I'd overlooked these as they were only modified as
necessary; the "BSD" part made me think they'd be the same as the same
online versions I'd already read (that were *nix specific).
Obviously, I was wrong.  These had the default paths to the magic*
files listed; C:\Program Files\File\share\file\.

If one creates said directory structure and moves/copies/unpacks the
magic ("database") files THERE, then one may do:

    >>> import magic
    >>> test = magic.Magic() # <-- New Magic class instance
    >>> test.from_file( 'C:\\startrek.exe' ) # <-- Yeah, I have an old
Star Trek game file here to test with...  :)
    'MS-DOS executable, MZ for MS-DOS'  # <-- This is what's
returned...

Alternately, if one wishes to leave/place the magic files elsewhere,
do like:

    >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
\share\\file\\magic' ) # <-- spec where/what the file is

NOTE: Even if the "magic_file" location *is* specified, "mime = True"
still works fine.  (Haven't checked, but I presume the source simply
tacks ".mime" to the filename automagically.)  Obviously/also, one
needn't specify the argument names if one uses proper argument order:
magic.Magic( mime, magic_file )  :)


THANKS SO MUCH, Michael, for your answers and helping me alone the
way...  :)


Cheers,
-Larry


From h.goebel at goebel-consult.de  Tue May 20 04:09:14 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Tue, 20 May 2008 10:09:14 +0200
Subject: Running commands on cisco routers using python
In-Reply-To: <2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>
References: <mailman.1350.1211210320.12834.python-list@python.org>
	<2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>
Message-ID: <4832872a$0$6504$9b4e6d93@newsspool4.arcor-online.net>

Mike Driscoll schrieb:
> On May 19, 10:18 am, SPJ <mail2... at yahoo.com> wrote:
>> Is it possible to run specific commands on cisco router using Python?
>> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.
>>
>> Thanks,
>> SPJ
> 
> I think it depends on how you're connecting to the routers.
> Theoretically, you should be able to use Python's socket or ssh
> modules to connect to them, send commands and capture the output.

I've implemented a toolset for login into cisco components, issueing 
commands and fetchign the results. Works like a charm.

Keypoint here is using pexpect for interacting with SSH.

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From bignose+hates-spam at benfinney.id.au  Fri May 16 21:37:05 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 17 May 2008 11:37:05 +1000
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
Message-ID: <878wy9soce.fsf@benfinney.id.au>

amit.uttam at gmail.com writes:

> I've recently jumped big time into python and I'm working on a
> software program for testing automation.

Welcome, to both fields :-)

> I had a question about proper logging of output. What I would like
> is:
> 
>  1. a function syslog (to log output to log file only)
>  2. a function stdout (to log output to stdout only)
>  3. a function sslog (to log output to both log and stdout)
> 
> Right now I am using StandOut module

Have you investigated the 'logging' module in the Python standard
library <URL:http://www.python.org/doc/lib/module-logging>? It appears
to meet your listed requirements, without need of external
dependencies.

-- 
 \        "I went to the hardware store and bought some used paint. It |
  `\                   was in the shape of a house."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From mage2k at gmail.com  Thu May 15 21:12:29 2008
From: mage2k at gmail.com (Erik Jones)
Date: Thu, 15 May 2008 20:12:29 -0500
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
Message-ID: <86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>

On Thu, May 15, 2008 at 12:21 PM, Marcelo de Moraes Serpa <
celoserpa at gmail.com> wrote:

> Hello,
>
> So, I have this particular method, generate_chat_dir_string, which should
> generate a string in the following format:
>  "md5hexstring-day-month-year-hour-minute"
>
> This string will be used to create a directory in the filesystem.
>
> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
> methods of the Chat class, including this one. However, an issue just popped
> up, this is the test code:
>
>
>    1.   def test_generate_chat_dir_string(self):
>    2.         import md5
>    3.         import random
>    4.         import datetime
>    5.         md5_handler = md5.new()
>    6.         users = [{"user":"pedro","atendente":False},{
>    "user":"jo?o","atendente":True}]
>    7.         #salt = random.random().to_s()
>    8.         #md5_handler.update(salt)
>    9.         now = datetime.datetime.now()
>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>    11.         for user in users:
>    12.             md5_handler.update(user["user"])
>    13.
>    14.
>    15.         seed = md5_handler.hexdigest()
>    16.
>    17.         final_string = seed + "-" + ts
>    18.
>    19.         method_generated_string =
>    self.chat.generated_chat_dir_string(users,seed)
>    20.
>    21.         self.assertEquals(final_string,method_generated_string)
>
> As you can see, it generates a specific set of data and assembles a
> final_string. It then feeds the same data to generate_chat_dir_string and
> compare to see if the final_string is equal to the string generated by the
> tested method.
>
> However, they might not be equal becouse of the temporal data. In this case
> I'm not using seconds, but in a bizarre situation a minute could have passed
> and the test would faile becouse the two strings would have a different
> minute portion. Something like this:
>
> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"
>
> How could I handle this issue?
>
> Thanks in advance,


Add another parameter, with a default, to the method's interface:

def test_generate_chat_dir_string(self, now=None):
    if not now:
        import datetime
        now = datetime.datetime.now()
    .....


That way you can feed it values when testing to validate the calculations
but leave it up to the datetime module to fill in the used value in
production.



-- 
Erik Jones
mage2k at gmail.com
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From petr.poupa at gmail.com  Mon May 12 11:34:07 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 08:34:07 -0700 (PDT)
Subject: Socket and cycle problem
Message-ID: <67c1d643-5445-46c8-b00f-20238badd398@56g2000hsm.googlegroups.com>

Hello,
I am beginner but so I need help. I have small script for receive data
from port 3883, but it print only once.

import socket

HOST = 'localhost'
PORT = 3883
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
data = s.recv(2048)
s.close()
print 'receive data from server:', `data`

So I try to write cycle to this script, like this:

import socket

HOST = 'localhost'
PORT = 3883
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
while 1:
    s.connect((HOST, PORT))
    data = s.recv(2048)
    s.close()
    print 'receive data from server:', `data`

But Python reporting:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
<module>
    s.connect((HOST, PORT))
  File "<string>", line 1, in connect
  File "C:\Python25\lib\socket.py", line 141, in _dummy
    raise error(EBADF, 'Bad file descriptor')
error: (9, 'Bad file descriptor')

Where is the mistake? I dont know.

thaks for help
Petr


From aspersieman at gmail.com  Thu May  8 03:54:59 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 09:54:59 +0200
Subject: POP connection timeout.
Message-ID: <4822B1D3.1090200@gmail.com>

Hi All

I am have written an application that queries a POP mailbox and 
downloads messages. When the application tries to connect to the mail 
server, but takes too long (eg. longer than 60 seconds) I want to have 
it time out.

Something like

try:
    pop = poplib.POP3(POPHOST, POPPORT)
except someerror, err:
    print "Connecting to mail box has timed out:\n", err

I know that in python 2.5 I could pass an additional timeout parameter 
to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
TIMEOUTINSECONDS), but I am using python 2.4.

Can anyone help me implement this timeout functionality.

Regards

Nicol
-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From google at mrabarnett.plus.com  Mon May 26 18:07:16 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Mon, 26 May 2008 15:07:16 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com> 
	<hoE_j.50548$7a.47091@bignews1.bellsouth.net>
Message-ID: <0e7d5f8e-84b3-4da3-bd69-0b275e31720d@59g2000hsb.googlegroups.com>

On May 26, 8:43 pm, "inhahe" <inh... at gmail.com> wrote:
> I like to think of a language that would combine low-level and high-level
> features to be used at the programmer's whim.  C--, High Level Assembly, and
> C++ with in-line assembly are examples, but none of them come as high-level
> as Python. Other possible examples might be ctypes, numpy, array.array, and
> I heard a rumor that Python 3.0 might have optional type declarations.   My
> ideal language would be like a version of C++ (including in-line asm), or
> C-- with classes, that's compiled, but supports Python abstractions and
> features wherever possible (including doing away with {}'s and ;'s).
>
[snip]
The problem with in-line asm is that it's processor-specific; I think
that going lower level than C would be a mistake, except in very
special cases.


From ivan.illarionov at gmail.com  Wed May  7 21:19:02 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 8 May 2008 01:19:02 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
	<fvtk7v$864$1@news.mtu.ru>
Message-ID: <fvtke6$864$2@news.mtu.ru>

On Thu, 08 May 2008 01:15:43 +0000, Ivan Illarionov wrote:

> On Wed, 07 May 2008 21:13:27 -0400, Miles wrote:
> 
>> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>>  <ivan.illarionov at gmail.com> wrote:
>>  > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>>  >
>>  >  > Is there a way to do:
>>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>  >  > x[0,2:6]
>>  >  >
>>  >  > That would return:
>>  >  > [0, 3, 4, 5, 6]
>>  >
>>  >  IMHO this notation is confusing.
>>  >
>>  >  What's wrong with:
>>  >  [0]+x[2:6]
>> 
>>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list
>>  slicing:
>> 
>>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10); return @x[0, 2..6]; //
>>  returns (1, 3, 4, 5, 6)
> 
> So it should be x[0] + x[2:6] or x[0].extend(x[2:6])

Oh, I meant
[x[0]] + x[2:6]
or
y = [x[0]]
y.extend(x[2:6])

Sorry





From google at mrabarnett.plus.com  Wed May 21 15:14:00 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 12:14:00 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com>

On May 21, 4:15 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Or just:
>
> > If command is "quit" ...
>
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
>
>      Read data from "input.txt".
>      If data is an error then go to ...
>
> Or when assigning a type to an identifier:
>
>      HarmonicMean is a function(x, y) ...
>      LoopCount is a variable ...
>
> By using = only for equality and "is" only for types, the Flaming
> Thunder compiler can detect when either is being used incorrectly
> because the syntax for the two is incompatible.  That avoids the man-
> years of wasted debugging time spent on languages that accept
> statements that are easily confused, yet syntactically valid (e.g. the
> confusion between = and == in C if-statments, or the confusion between
> = (equality) and "is" (identity) in Python).
>
[snip]
I wonder whether "is" could be used both for "x is value" and "x is a
type" without causing a problem:

If command is a string ...

If command is "quit" ...


From arnodel at googlemail.com  Mon May 12 02:31:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 07:31:32 +0100
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <m2skwo2fuj.fsf@googlemail.com>

Yves Dorfsman <yves at zioup.com> writes:

> Is there anyway to tell python I don't care about a value ?
>
> Say I want today's year and day, I'd like to do something like:
>
> import time
> y, None, d, None, None, None, None = time.localtime()
>
> I know you can't assign anything to None, but I'm sure you get what I
> mean, a special keyword that means I don't care about this value. In
> this particular case, there's got to be a better way than:
>
> d = time.local()
> y = d[0]
> d = d[1]
>

I use Paul Rubin's solution (which is frown upon by many:), but it's
true it would be nice for tuples to have something like an extract()
method:

y, d = time.localtime.extract(0, 2)

Where 

    mytuple.extract(i1, i2, i3...)

would mean:

    tuple(mytuple[i] for i in (i1, i2, i3...))

Or perhaps allow indexing by tuples:

    mytuple[i1, i2, i3...]

-- 
Arnaud


From apardon at forel.vub.ac.be  Fri May 23 05:36:40 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 23 May 2008 09:36:40 GMT
Subject: unittest: Calling tests in liner number order
Message-ID: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>

Some time ago I asked whether is would be possible that unittest would
perform the test in order of appearence in the file.

The answers seemed to be negative. Since I really would like this
behaviour I took the trouble of looking throught the source and
I think I found a minor way to get this behaviour.

Now my questions are:

Are other people interrested in this behaviour?
Does the following patch has a chance of being introduced in the
standard python distribution?

*** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
--- unittest.py 2008-05-23 11:19:57.000000000 +0200
***************
*** 570,575 ****
--- 570,577 ----
          """
          def isTestMethod(attrname, testCaseClass=testCaseClass, prefix=self.testMethodPrefix):
              return attrname.startswith(prefix) and callable(getattr(testCaseClass, attrname))
+         def getlinenr(name):
+             return getattr(testCaseClass, name).im_func.func_code.co_firstlineno
          testFnNames = filter(isTestMethod, dir(testCaseClass))
          for baseclass in testCaseClass.__bases__:
              for testFnName in self.getTestCaseNames(baseclass):
***************
*** 577,582 ****
--- 579,586 ----
                      testFnNames.append(testFnName)
          if self.sortTestMethodsUsing:
              testFnNames.sort(self.sortTestMethodsUsing)
+         else:
+             testFnNames.sort(key=getlinenr)
          return testFnNames
  



From alex.m.gusarov at gmail.com  Tue May 27 08:00:36 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 19:00:36 +0700
Subject: integration with browser
In-Reply-To: <9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
Message-ID: <ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
>
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.
>

Really, try WebKit <http://webkit.org/> - Safari browser uses it.
Last releases of PyQt4
<http://www.riverbankcomputing.co.uk/software/pyqt/>(Qt, of course,
too) includes QWebKit -
WebKit <http://webkit.org/> wrappings.

--
Best regards, Alex Gusarov
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From python at bdurham.com  Fri May  2 12:40:21 2008
From: python at bdurham.com (python at bdurham.com)
Date: Fri, 02 May 2008 12:40:21 -0400
Subject: Preventing 'bad' filenames from raising errors in os.path
Message-ID: <1209746421.26496.1251103145@webmail.messagingengine.com>

Bad file names, i.e. filenames the OS considers illegal, will cause
functions in the os.path module to raise an error.

Example:

import os.path
print os.path.getsize( 'c:/pytest/*.py' )

On Windows XP using Python 2.5.2 I get the following traceback:

Traceback (most recent call last):
  File "<string>", line 74, in run_nodebug
  File "<Module1>", line 3, in <module>
  File "C:\Python\lib\ntpath.py", line 228, in getsize
    return os.stat(filename).st_size
WindowsError: [Error 123] The filename, directory name, or volume label
syntax is incorrect: 'c:/pytest/*.py'

Since there are many places a user can enter a path name (interactively,
via config files, etc) in most applications, is there an os sensitive
function that can be used to detect bad file names?

As a matter of best practice, how do you wrap your use of file and path
names to prevent unexpected failures? (There has to be a better
alternative than try/except blocks around each use of an os.path
function in one's code?)

Thanks,
Malcolm


From michael.pearmain at tangozebra.com  Fri May 16 18:14:53 2008
From: michael.pearmain at tangozebra.com (Mike P)
Date: Fri, 16 May 2008 15:14:53 -0700 (PDT)
Subject: Rpy Module
Message-ID: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>

Hi experts,

I've just seen there is an R module, what i can't see easily is if you
can / how to import other modules for R into the Rpy module

Can anyone advise on this?

Cheers

Mike


From jon at ffconsultancy.com  Thu May  8 20:41:26 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Fri, 09 May 2008 01:41:26 +0100
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>
	<mailman.824.1210293106.12834.python-list@python.org>
Message-ID: <Ns-dnZ8edO1xA77VRVnyjAA@posted.plusnet>

Terry Reedy wrote:
> "Jon Harrop" <jon at ffconsultancy.com> wrote in message
> news:5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d at plusnet...
> | Perhaps the best example I can think of to substantiate your original
> point
> | is simple comparison because Mathematica allows:
> |
> |  a < b < c
> |
> | I wish other languages did.
> 
> Python does also.

Nice. :-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From wxPythoner at gmail.com  Sat May 10 16:59:37 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:59:37 -0700 (PDT)
Subject: Python, are you ill?
Message-ID: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>

If you are in the interactive prompt of the Python interpreter and you
do this

print """Testing\"""   or   print '''Testing\'''

you get three dots [...] as if Python expects a code block. If you
press Enter, you get three dots again, and again, and again... You
can't get out of the code block with pressing the Enter key; you have
to press Ctrl+Z (if you're in Linux) in order to get out of that code
block, which then throws you back to the Linux command line, but
before that it prints this line

[1]+  Stopped                 python


If you do

print "Testing\"   or   print 'Testing\'

you get an error, but not of you use the triple quotes. Is that a bug
in the interpreter perhaps?


From ohad.frand at percello.com  Tue May 13 04:16:51 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Tue, 13 May 2008 11:16:51 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F37@percello-sbs.percello.local>

Hi
Thanks a lot for your reply
I think the main uses for it is to study the language and to see that I
didn't miss anything else or that something is changed from one version
to another.

The keyword module will help me

Thanks again
Ohad Frand


-----Original Message-----
From: Gary Herron [mailto:gherron at islandtraining.com] 
Sent: Tuesday, May 13, 2008 11:11 AM
To: Ohad Frand
Cc: python-list at python.org
Subject: Re: question about python statements

Ohad Frand wrote:
> Hi Gary
>
> Sorry that I was not clear, I hope that this time I will explain
myself
> better.
>
> I can get list of all builtin functions in python by
dir(__builtins__).
> This return a list of string with most known names to python language
> such as: 
> [... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
> 'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow',
'property',
> 'quit', 'range', 'raw_input', 'reduce', 'reload'...]
>
> But I don't know how to generate the next list of builtin python
> statements:
>
['assert','break','class','continue','def','del','elif','else','except',
> 'exec','finally','for','from','global',
> 'if','import','pass','print','raise','return','try','while','yield']
>   

There is no way you can consider 'elif', 'else', 'except', and 'from' 
statements.  However, as someone pointed out, the kwlist from the 
keyword module is the closest thing we can think of to the list you are 
asking for.

On the other hand, what's wrong with constructing the list as you did in

your example above?


Just out of curiosity, *why* do you want this list.   Perhaps is we knew

that, we could think of a programmatic way to construct the list you 
want.   The biggest challenge at the moment is that we have no idea what

you mean by statement, but it is certainly not what Python considers 
statements.

Gary Herron



> Thanks,
> Ohad Frand
>
> -----Original Message-----
> From: Gary Herron [mailto:gherron at islandtraining.com] 
> Sent: Monday, May 12, 2008 10:41 PM
> To: Ohad Frand
> Cc: python-list at python.org
> Subject: Re: question about python statements
>
> Ohad Frand wrote:
>   
>> Hi
>>
>> I am looking for a way to programmically get a list of all python 
>> existing statements that I cannot access by __builtins__ or locals()
>>
>> (like ["assert","break","class",...])
>>
>> Thanks,
>>
>> Ohad
>>
>>
>>     
>
------------------------------------------------------------------------
>   
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>     
> Sorry, I've no idea what you mean here. Perhaps you could help us by 
> defining what you mean by
> "statements that I cannot access by __builtins__ or locals()"
>
> Is there any statement that you *can* access in such a way?
>
> What does it even mean to "access a statement"?
>
> Do you even have a list of "statements" from which we are to work? 
> Python is a little unusual in what it considers statements.
>
> Gary Herron
>
>
>
>
>   



From bignose+hates-spam at benfinney.id.au  Tue May 13 19:42:12 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:42:12 +1000
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
	<e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
Message-ID: <87lk2d4vqj.fsf@benfinney.id.au>

John Henry <john106henry at hotmail.com> writes:

> On May 13, 1:18 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > John Henry schrieb:
> >
> > > the class CodeEditor all exists and yet idle keep complaining
> > > that it can't import from PythonCard.tools.
> >
> > How do these complaints *look* - we can't read your mind nor your
> > screen, as you might imagine....
> 
> Thumper's dad always told him: If you don't have anything
> nice/useful/ garbage to say, then don't say noth'ng at all.

Thanks for the aphorism. You're still no closer to actually getting a
useful answer, until you can provide the information Diez explained
that we need.

-- 
 \          "I used to be a proofreader for a skywriting company."  -- |
  `\                                                     Steven Wright |
_o__)                                                                  |
Ben Finney


From arnodel at googlemail.com  Sat May  3 16:38:21 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 21:38:21 +0100
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <m2ve1vkts2.fsf@googlemail.com>

Szabolcs Horv?t <szhorvat at gmail.com> writes:

> Arnaud Delobelle wrote:
>>
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
>
> This occurred to me also, but then I tried
>
> sum(['abc', 'efg'], '')
>
> and it did not work.  Or is this just a special exception to prevent
> the misuse of sum to join strings?  (As I said, I'm only an occasional
> user.)

I think that's right: anything with an __add__ method, apart from
string, can be sum()ed.

-- 
Arnaud


From mgi820 at motorola.com  Mon May 12 12:38:23 2008
From: mgi820 at motorola.com (Gary Duzan)
Date: Mon, 12 May 2008 16:38:23 +0000 (UTC)
Subject: passing *args "recursively"
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <g09rpv$lbs$1@engnntp2.cig.mot.com>

In article <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9 at e53g2000hsa.googlegroups.com>,
Guillermo  <guillermo.listas at googlemail.com> wrote:
>
>Hi,
>
>This must be very basic, but how'd you pass the same *args several
>levels deep?
>
>
>def func2(*args)
>
>    print args # ((1, 2, 3),)
>    # i want this to output (1, 2, 3) as func1!
>    # there must be some better way than args[0]?
>
>def func1(*args):
>
>    print args # (1, 2, 3)
>    func2(args)
     func2(*args) # <<<<<<======
>
>func1(1,2,3)

					Gary Duzan
					Motorola H&NM




From gagsl-py2 at yahoo.com.ar  Fri May  2 17:54:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:54:00 -0300
Subject: Need help: Compiling Python-Code &In-Reply-To=
References: <mailman.483.1209761575.12834.python-list@python.org>
	<XPidnVS98e29F4bVnZ2dnUVZ_ramnZ2d@comcast.com>
Message-ID: <op.uajq4afmx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 18:39:36 -0300, Larry Bates <larry.bates at websafe.com`>  
escribi?:

> No real reason to get shutil involved in this.

...except memory usage; shutil.copyfileobj reads the input in chunks, but  
your version reads the whole file in memory. Depending on the file sizes,  
this might be an issue.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Mon May 12 13:29:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 18:29:06 +0100
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
	<c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>
Message-ID: <m2k5hz2zz1.fsf@googlemail.com>

Paul Hankin <paul.hankin at gmail.com> writes:

> On May 12, 1:59 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> On May 12, 1:30 pm, John Machin <sjmac... at lexicon.net> wrote:
>>
>> > Duncan Booth wrote:
>> [...]
>> > > I think the variant I came up with is a bit clearer:
>>
>> > > for i in range(1,101):
>> > >    print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>>
>> > More than a bit clearer, IMO. How about
>> >      print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
>> > (or perhaps
>> >      print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
>> > to save looking up the precedence rules) ?
>>
>> Stuff clarity!  How about
>>
>> for i in xrange(1, 101):
>>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i
>
> for i in xrange(1, 101):
>     print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

I like this, I can imagine plenty of use cases...

...in codegolf

-- 
Arnaud


From badmuthahubbard at gmail.com  Sun May  4 18:27:08 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Mon, 5 May 2008 01:27:08 +0300
Subject: Can I install Python 2.4 and 2.5 ?
In-Reply-To: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
References: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
Message-ID: <8200bab70805041527r6a0d2e59pfbad10818d39fb78@mail.gmail.com>

I have both python2.4 and python2.5 as executables, and "python" as a
symbolic link to python2.4.  This is the default setup if you install
both from the Debian repositories, so probably with Ubuntu as well.
If you like you can change "python" to point to either one (or to any
other program, if you really want).  I don't have my win install in
front of me at the moment, but I know I do have both there as well.
-Chuckk

On Mon, May 5, 2008 at 1:01 AM, adolfo <aguirre.adolfo at gmail.com> wrote:
> I am reviewing various visualization programs (Scipy, PYGNL, etc) and
>  IDE?s. Some run on Python 2.4 others in 2.5.
>
>  Can I have both installed at the same time if I don?t run them
>  concurrently?
>
>  Now in Windows XP soon on Ubuntu 8
>
>  Appreciating your help,
>
>  Adolfo
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com

From jon at ffconsultancy.com  Thu May  8 14:02:18 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 08 May 2008 19:02:18 +0100
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>

xahlee at gmail.com wrote:
> I'd like to introduce a blog post by Stephen Wolfram, on the design
> process of Mathematica. In particular, he touches on the importance of
> naming of functions.
> 
> ? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
> Wolfram
>  http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/
> 
> The issue is fitting here today, in our discussion of ?closure?
> terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
> meaning space vs single-meaning space), ?tail recursion?, ?currying?,
> ?lambda?, that perennially crop up here and elsewhere in computer
> language forums in wild misunderstanding and brouhaha.
> 
> The functions in Mathematica, are usually very well-name, in contrast
> to most other computing languages.

The mathematical functions are well named but many of the general
programming constructs are not even well defined, let alone well named.

For example, overloaded "Gamma" in Mathematica vs "gammainc" in MATLAB for
the incomplete gamma functions.

> In particular, the naming in 
> Mathematica, as Stephen Wolfram implied in his blog above, takes the
> perspective of naming by capturing the essense, or mathematical
> essence, of the keyword in question. (as opposed to, naming it
> according to convention, which often came from historical happenings)
> When a thing is well-named from the perspective of what it actually
> ?mathematically? is, as opposed to historical developments, it avoids
> vast amount of potential confusion.
> 
> Let me give a few example.
> 
> ? ?lambda?, widely used as a keyword in functional languages, is named
> just ?Function? in Mathematica. The ?lambda? happend to be called so
> in the field of symbolic logic, is due to use of the greek letter
> lambda ??? by happenstance. The word does not convey what it means.
> While, the name ?Function?, stands for the mathematical concept of
> ?function? as is.

Look at the "function" keyword in OCaml and F#. They also pattern match over
their input whereas Mathematica does not allow this in "Function".

> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
> lisp's keywords ?let?, is based on the English word ?let?. That word
> is one of the English word with multitudes of meanings. If you look up
> its definition in a dictionary, you'll see that it means many
> disparate things. One of them, as in ?let's go?, has the meaning of
> ?permit; to cause to; allow?. This meaning is rather vague from a
> mathematical sense. Mathematica's choice of Module, Block, is based on
> the idea that it builds a self-contained segment of code. (however,
> the choice of Block as keyword here isn't perfect, since the word also
> has meanings like ?obstruct; jam?)

Bad example. Mathematica's "Block" implements what we all know as "Scope".
Mathematica's "Module" implements something most people have never needed
to learn (rewriting a subexpression with uniquely tagged identifiers to
disambiguate them from externals):

  In[1] := Module[{a}, a]
  Out[1] = a$617

> ? Functions that takes elements out of list are variously named First,
> Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
> opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
> ?unshift?, in lisps and perl and other langs.

You are comparing arrays in Mathematica to lists in other functional
languages. Mathematica is often asymptotically slower as a consequence,
with "Rest" being O(n):

  In[1] := AbsoluteTiming[Rest[Range[1, 1000000]];]
  Out[1] = {0.219, Null}

The equivalents over lists are all O(1) in SML, OCaml, F#, Haskell, Scala,
Lisp and Scheme and is called the "tail" of a list. For example, in F#:

  > time List.tl [1 .. 1000000];;
  Took 0ms
  val it : int list = ...

Perhaps the best example I can think of to substantiate your original point
is simple comparison because Mathematica allows:

  a < b < c

I wish other languages did.

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From turian at gmail.com  Fri May  9 17:20:38 2008
From: turian at gmail.com (Joseph Turian)
Date: Fri, 9 May 2008 14:20:38 -0700 (PDT)
Subject: Property in derived class
Message-ID: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>

If I have a property in a derived class, it is difficult to override
the get and set functions: the property's function object had early
binding, whereas the overriden method was bound late.
This was previously discussed:
   http://groups.google.com/group/comp.lang.python/browse_thread/thread/e13a1bd46b858dc8/9d32049aad12e1c1?lnk=gst#9d32049aad12e1c1

Could someone demonstrate how to implement the proposed solutions that
allow the property to be declared in the abstract base class, and
refer to a get function which is only implemented in derived classes?

Thanks,
  Joseph


From mishok13 at gmail.com  Wed May 14 13:09:20 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Wed, 14 May 2008 20:09:20 +0300
Subject: built in list generator?
In-Reply-To: <482B1E8C.1010800@admailinc.com>
References: <87hcd14vo0.fsf@benfinney.id.au> <482B1E8C.1010800@admailinc.com>
Message-ID: <192840a00805141009t152d0e5fl5143359a3c43cbbd@mail.gmail.com>

2008/5/14 Ethan Furman <efurman at admailinc.com>:
>
>  Ben Finney wrote:
>
>
> Subject: Re: built in list generator?
>
> From: Ben Finney <bignose+hates-spam at benfinney.id.au>
>
> Date: Wed, 14 May 2008 09:43:43 +1000
>
> To: python-list at python.org
>
> To: python-list at python.org
>
> Newsgroups: comp.lang.python
>
>  "Diez B. Roggisch" <deets at nospam.web.de> writes:
>
>
>
>  globalrev schrieb:
>
>
>  if i want a list with all numbers between x and y is there a way to
> do this with an inbult function.
>
> i mean i can always construct a function to do this but is there
> soemthing like:
>
> nbrs = list(range(50,100, 2))
>
>  range *does* that. use xrange if all you want is to iterate.
>
>  Until Python 3.0, where 'range' returns an iterable.
>
>  Is there a thread somewhere of the discussion for this change?  I'm
> presuming range is used almost exclusively in loops where a change in the
> return type would have no negative effect.
>  --

http://mail.python.org/pipermail/python-dev/2003-April/034534.html

>  Ethan
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From bj_666 at gmx.net  Mon May 26 02:53:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 26 May 2008 06:53:24 GMT
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
	<98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>
	<0ccd6c54-ecd9-46e8-a1f6-5313f3d7a45d@w7g2000hsa.googlegroups.com>
Message-ID: <69v534F344q4lU2@mid.uni-berlin.de>

On Sun, 25 May 2008 21:00:01 -0700, Yosifov Pavel wrote:

> OK. I understand point of view of all responders.
> It seems I surmised why it's very difficult to do in tool like
> PyChecker: not only functions/methods but usual Python expression can
> mask potential exception source. And this tool must know how to parse
> every expression deep (to object protocol methods, for example). But
> it's possible in principle...

So which *specific* exceptions can be thrown by this function:

def f():
    raise globals()[raw_input()]()

Ciao,
	Marc 'BlackJack' Rintsch


From celoserpa at gmail.com  Thu May 15 21:44:17 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 22:44:17 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
Message-ID: <1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>

Thank you for the replies.

@Gabriel: I understand what you are saying. It all depends on what you want
to test. In this case, I wanted to test the algorithm of the method.  The
test_generate_chat_dir_string is meant to do just that: Check if the
generate_chat_dir_string generated a "valid" (according to the specs) string
for a "chat dir name".

It is not a integration nor a functional "unit" test, but it is a "real"
unit test in the sense that I created a test for each method and I exercised
the methods the following way:

 1) Got some data to test and...
 2) ... Generated an output "manually" in the test method that I knew were
the expected return of the tested method;
 3) Fed this data to the tested method and compared the manually generated
result with the return value of the method.

It is like testing a method that does a simple division:

def test_divide
  divdend = 10
  divisor = 2
  expected_result = 5
  self.assertEquals(mathprogram.divide(dividend,divisor),5)

The techniques you explained in your message sound more like functional
testing or integration + functional testing where multiple aspects of a
single functional unit are being exercised. Or am I wrong?

@Erik:

I solved the problem by replacing the datetime.datetime with a custom
instance in the test method body:

def my_test_method
   now = datetime.datetime.now()
   class my_custom_datetime(object):
        def now(self): return now
   datetime.datetime = my_custom_datetime()

works great. Thanks to Zalamander @ #python on EFNET ;)



On Thu, May 15, 2008 at 10:12 PM, Erik Jones <mage2k at gmail.com> wrote:

>
>
> On Thu, May 15, 2008 at 12:21 PM, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> wrote:
>
>> Hello,
>>
>> So, I have this particular method, generate_chat_dir_string, which should
>> generate a string in the following format:
>>  "md5hexstring-day-month-year-hour-minute"
>>
>> This string will be used to create a directory in the filesystem.
>>
>> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
>> methods of the Chat class, including this one. However, an issue just popped
>> up, this is the test code:
>>
>>
>>    1.   def test_generate_chat_dir_string(self):
>>    2.         import md5
>>    3.         import random
>>    4.         import datetime
>>    5.         md5_handler = md5.new()
>>    6.         users = [{"user":"pedro","atendente":False},{
>>    "user":"jo?o","atendente":True}]
>>    7.         #salt = random.random().to_s()
>>    8.         #md5_handler.update(salt)
>>    9.         now = datetime.datetime.now()
>>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>>    11.         for user in users:
>>    12.             md5_handler.update(user["user"])
>>    13.
>>    14.
>>    15.         seed = md5_handler.hexdigest()
>>    16.
>>    17.         final_string = seed + "-" + ts
>>    18.
>>    19.         method_generated_string =
>>    self.chat.generated_chat_dir_string(users,seed)
>>    20.
>>    21.         self.assertEquals(final_string,method_generated_string)
>>
>> As you can see, it generates a specific set of data and assembles a
>> final_string. It then feeds the same data to generate_chat_dir_string and
>> compare to see if the final_string is equal to the string generated by the
>> tested method.
>>
>> However, they might not be equal becouse of the temporal data. In this
>> case I'm not using seconds, but in a bizarre situation a minute could have
>> passed and the test would faile becouse the two strings would have a
>> different minute portion. Something like this:
>>
>> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
>> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"
>>
>> How could I handle this issue?
>>
>> Thanks in advance,
>
>
> Add another parameter, with a default, to the method's interface:
>
> def test_generate_chat_dir_string(self, now=None):
>     if not now:
>         import datetime
>         now = datetime.datetime.now()
>     .....
>
>
> That way you can feed it values when testing to validate the calculations
> but leave it up to the datetime module to fill in the used value in
> production.
>
>
>
> --
> Erik Jones
> mage2k at gmail.com
>
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From gagsl-py2 at yahoo.com.ar  Sat May 24 21:45:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 22:45:48 -0300
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
	<ae23c0ab-62e8-486c-b79b-a1672c1c666d@d45g2000hsc.googlegroups.com>
Message-ID: <op.ubosimdlx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 14:05:42 -0300, MRAB <google at mrabarnett.plus.com> escribi?:
> On May 22, 3:20 pm, s0s... at gmail.com wrote:

>> > > In my case, what I'm doing is sending the return value through a
>> > > socket:
>>
>> > > sock.send(f.read())
>>
>>
> I would go with:
>
> f = file("filename", "rb")
> while True:
>     data = f.read(MAX_BUF_SIZE)
>     if not data:
>         break
>     sock.sendall(data)

Another way is to use the shutil module:

fin = open("filename", "rb")
fout = sock.makefile()
shutil.copyfileobj(fin, fout)

-- 
Gabriel Genellina



From lists at cheimes.de  Thu May  1 08:09:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 14:09:21 +0200
Subject: Python 2.6 and wrapping C libraries on Windows
In-Reply-To: <9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92>	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
Message-ID: <4819B2F1.9030100@cheimes.de>

illume schrieb:
> Hi,
> 
> after a little research it appears that win9x is not supported by the
> msvcr90.dll run time.
> 
> Can you confirm this Lenard?
> 
> Has anyone tested the new python binaries that link to msvcr90.dll on
> win9x machines?

It doesn't matter to use because Python 2.6 and 3.0 require at least
Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.

Christian



From justjpm at aol.com  Wed May 28 11:19:04 2008
From: justjpm at aol.com (Jim)
Date: Wed, 28 May 2008 08:19:04 -0700 (PDT)
Subject: BadStatusLine error
Message-ID: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>

Hi

I get a BadStatusLine error (indicated below). Can anyone help with
how to
catch error in code before abort?

Thanks
Jim

Traceback (most recent call last):

  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\framework
\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:Lookup.py", line 103, in <module>
    contents = urllib2.urlopen(url).read()
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 374, in open
    response = self._open(req, data)
  File "C:\Python25\lib\urllib2.py", line 392, in _open
    '_open', req)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 1100, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "C:\Python25\lib\urllib2.py", line 1073, in do_open
    r = h.getresponse()
  File "C:\Python25\lib\httplib.py", line 924, in getresponse
    response.begin()
  File "C:\Python25\lib\httplib.py", line 385, in begin
    version, status, reason = self._read_status()
  File "C:\Python25\lib\httplib.py", line 349, in _read_status
    raise BadStatusLine(line)
BadStatusLine



From needin4mation at gmail.com  Thu May  1 11:03:21 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 08:03:21 -0700 (PDT)
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
Message-ID: <7ab85e64-1d0a-4332-b7c0-e46bd97870dd@2g2000hsn.googlegroups.com>

On May 1, 10:59?am, jmDesktop <needin4mat... at gmail.com> wrote:
> This program:
>
> s = 'abcde'
> i = -1
> for i in range (-1, -len(s), -1):
> ? ? print s[:i], i
>
> gives
>
> abcd -1
> abc -2
> ab -3
> a -4
>
> Why doesn't the first one have the e if -1 is the end of the list? ?In
> Dive Into Python it said that -1 was the end of the list. ?Thanks.
>
> it is from Chun's book, slightly modified by me to see the index.

Sorry.  It's because of the : right?  up to but not including.  Dive
into was just list[-1] not list[:-1].  I looked at the for while
before posting and then as soon as I posted I saw it.


From tjreedy at udel.edu  Thu May  8 20:39:38 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 20:39:38 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
Message-ID: <g006g5$a9d$1@ger.gmane.org>


"Luis Zarrabeitia" <kyrie at uh.cu> wrote in message 
news:200805081914.06459.kyrie at uh.cu...
| Btw, there seems to be a math problem in python with exponentiation...
| >>> 0**0
| 1
| That 0^0 should be a nan or exception, I guess, but not 1.

a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
But there are unenlighted people who agree with you ;-)
Wikipedia has a discussion of this.

tjr





From castironpi at gmail.com  Sun May 11 18:09:51 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 15:09:51 -0700 (PDT)
Subject: diffing and uniqing directories
References: <mailman.233.1209233669.12834.python-list@python.org> 
	<d0IVj.3118$17.1282@newssvr22.news.prodigy.net>
Message-ID: <8c38e218-ae6c-449b-951b-88ee3d849e24@m36g2000hse.googlegroups.com>

On May 11, 2:44?pm, Dan Stromberg <dstrombergli... at gmail.com> wrote:
> On Sat, 26 Apr 2008 23:44:17 +0530, Rustom Mody wrote:
> > Over years Ive collected tgz's of my directories. I would like to diff
> > and uniq them
>
> > Now I guess it would be quite simple to write a script that does a walk
> > or find through a pair of directory trees, makes a SHA1 of each file and
> > then sorts out the files whose SHA1s are the same/different. What is
> > more difficult for me to do is to write a visual/gui tool to help me do
> > this.
>
> > I would guess that someone in the python world must have already done it
> > [The alternative is to use some of the tools that come with version
> > control systems like git. But if I knew more about that option I would
> > not be stuck with tgzs in the first place ;-)]
>
> > So if there is such software known please let me know.
>
> > PS Also with the spam flood that has hit the python list I dont know if
> > this mail is being read at all or Ive fallen off the list!
>
> It doesn't have a GUI, but here's a python program I wrote for dividing
> large collections of files up into identical groups:
>
> http://stromberg.dnsalias.org/~strombrg/equivalence-classes.html- Hide quoted text -
>
> - Show quoted text -

I want to question terminology!

Question 'identical' groups over related!



From ivan.illarionov at gmail.com  Sat May  3 19:12:56 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 23:12:56 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
Message-ID: <fvirho$15ti$2@news.mtu.ru>

On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:

> On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
>> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>> 
>> > Arnaud Delobelle wrote:
>> >> 
>> >> sum() works for any sequence of objects with an __add__ method, not
>> >> just floats!  Your algorithm is specific to floats.
>> > 
>> > This occurred to me also, but then I tried
>> > 
>> > sum(['abc', 'efg'], '')
>> 
>> Interesting, I always thought that sum is like shortcut of
>> reduce(operator.add, ...), but I was mistaken.
>> 
>> reduce() is more forgiving:
>> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
> 
> Hm, it works for lists:
> sum(([1], [2]), [])
> [1, 2]
> 
> However I find the seccond argument hack ugly. Does the sum way have any
> performance advantages over the reduce way?

Yes, sum() is faster:

$ python -m timeit "" "sum([[1], [2], [3, 4]], [])"
100000 loops, best of 3: 6.16 usec per loop

$ python -m timeit "import operator" \
"reduce(operator.add, [[1], [2], [3, 4]])"
100000 loops, best of 3: 11.9 usec per loop

-- 
Ivan


From saluk64007 at gmail.com  Sat May 24 16:36:19 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 24 May 2008 13:36:19 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
Message-ID: <c3f69bf60805241336t22592f01r5c16176ef2a05b27@mail.gmail.com>

I can see both sides of this argument, and I think TDD is great in some
cases and not so great in others.  I have used it before, but don't use it
often, as the programs I write are very difficult to automatically test.
(Games, which many of the bugs have to do with whether an optimization
produces a visual artifact or not etc.  Not possible to test that!)

As far as time spent testing, it obviously various per project, person, and
methodology.  But I think you have some misconceptions about coding time.
With TDD, you cannot measure test writing and code separately.  Here's why.

When you write code and then write a test for it, you spend a lot of time
thinking about how the code is going to look while you are writing the
code.  You plan what the code is going to look like, what arguments are
going to be passed to a function, how the code might be used by other code,
etc.  This is thinking time, with no code written.  This is also interleaved
with the actual time spent writing the code.  (You are thinking of the plan
while you are typing the actual code).  Then you will likely do some sort of
debugging at least, if not writing a test.  This doesn't take much thought
as you have already front loaded the thought.  "Well I should print here to
make sure this line is correct."

>From a TDD perspective, most of the actual time is fairly the same, just
shifted around.  The thought process that I mentioned, of how code is going
to be used or how it fits the system, instead of being hinged on the code,
is now hinged on writing the test.  This makes the thought process more
formal than in the other methodology.  Instead of thinking of one thing (how
a function may be used) while doing something else (writing an if statement
within some logic), you are actually writing code based on the system
instead of the internal logic.  Then, you write some code that makes it
work.  In many cases, (and in my experience) the actual code is easier to
write in TDD, because it is more focused and directed.  I am not writing one
thing and keeping in mind other things.  You think, plan, and then write to
spec.  It is most certainly a more formal process, and can be hard to get
used to.

And it doesn't work in all situations of course.

But timewise it seems like all the processes are the same.  Without tdd, you
might, instead of writing a test per say, still spend that time writing a
doc string, or just looking at where a function will be used to see what the
code should look like etc.  I think though that test-first streamlines
things a bit.  By itself I don't think it makes the process faster, and that
front work of writing the tests can definitely feel slower.  Further on is
where you have the most benefit of having tests.  And with practice you can
get faster at it too.

Most programmers have their own methodology that they have used for a while,
so they are fast at it.  Any change in that is going to be extremely
sluggish until you are used to it.  You should try TDD at least once for a
small or medium project and go all the way through with it just to get a
feel for it.  If you can afford to of course :)
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From lists at cheimes.de  Sat May 17 08:59:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sat, 17 May 2008 14:59:51 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
Message-ID: <482ED6C7.8010603@cheimes.de>

inhahe schrieb:
> what is going on here, and how do I compile these external libraries? 

I assume you are trying to compile Python 2.5 with VS 9.0. It's not
supported. Some extensions don't compile under VS 9.0

Christian



From arnodel at googlemail.com  Sat May 31 04:19:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 09:19:12 +0100
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <m2fxryc2db.fsf@googlemail.com>

Cameron <cameronlarue at gmail.com> writes:

> I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
> Graham article</a> and he builds an accumuator generator function in
> the appendix. His looks like this:
>
> <pre>
> def foo(n):
>   s = [n]
>   def bar(i):
>     s[0] += i
>     return s[0]
>   return bar
> </pre>
>
> Why does that work, but not this:
>
> <pre>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar
> </pre>

Others have explained why, but this looks like "pythonized LISP" to
me.  I would rather use a generator function:

def foo(n):
    while True:
        n += yield n

Although the problem is that you can't send it values the first time
round!

>>> bar = foo('s')
>>> bar.next()
's'
>>> bar.send('p')
'sp'
>>> bar.send('am')
'spam'

But: 

>>> bar = foo(3)
>>> bar.send(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't send non-None value to a just-started generator
>>> 

-- 
Arnaud


From gandalf at shopzeus.com  Wed May 28 07:04:23 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 28 May 2008 13:04:23 +0200
Subject: datetime.stdptime help
In-Reply-To: <j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
References: <mailman.1653.1211902484.12834.python-list@python.org>	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
Message-ID: <483D3C37.50305@shopzeus.com>


> 	Out of curiosity -- just what zone /is/ "BDT"... The only thing that
> comes to mind is a type for "BST" (British Summer Time)
>   
I think you are right. This date string was taken from a .co.uk site. :-)

My fault. It was a 3 letter code after a date, I was sure that it is a 
time zone. Apparently, it is not. :-)

The "did not match format" message was misleading me. It would be better 
to throw ValueError("Unknown time zone: BDT"). :-)

Thank you,

   Laszlo



From sn at sncs.se  Tue May 27 10:19:29 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 07:19:29 -0700 (PDT)
Subject: New chairman
Message-ID: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>

seems to be needed

He doesn't seem to care much anyway now

Or if he cares, he have many other assignments

So should we try to elect a new chairman?

I am probably not eligible. There must be many others.!

Do you dare?consper

S.


From robert.spilleboudt.no.sp.am at skynet.be  Mon May 12 09:08:15 2008
From: robert.spilleboudt.no.sp.am at skynet.be (Robert.Spilleboudt )
Date: Mon, 12 May 2008 15:08:15 +0200
Subject: Saving an audio file's waveform into an image
In-Reply-To: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <4828413F.6090709@skynet.be>

I am using Snack to process the audio signal of a rc transmitter.
Look at
http://www.speech.kth.se/snack/
Another audio processing: PortAudio and the Python module PyAudio. Look 
at http://people.csail.mit.edu/hubert/pyaudio/
Robert

Julien wrote:
> Hi,
> 
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?
> 
> I heard about the Snack module, but the project looks dead and un-
> maintained.
> 
> Your advice would be greatly appreciated.
> 
> Thanks!
> 
> Julien


From lucaspm at dcc.ufba.br  Thu May  8 13:48:43 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Thu, 8 May 2008 14:48:43 -0300
Subject: "prove"
In-Reply-To: <18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>
References: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
	<18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>
Message-ID: <9f4be2240805081048s51d61b30l5b5d41e6caf4fad8@mail.gmail.com>

Thanks Marco, this is just what I was looking for.

On Thu, May 8, 2008 at 11:02 AM, David <wizzardx at gmail.com> wrote:
> >  classname.functionname(objectname)
>
>  Do you mean something like this?
>
>  class myclass:
>     @staticmethod
>     def myfunction(myobject): pass
>
>  myobject = None
>  myclass.myfunction(myobject)
No, but thanks for the link, very useful.


From wuwei23 at gmail.com  Mon May 12 04:01:47 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 01:01:47 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
Message-ID: <cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>

On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
> hi to all!
> can i load a module passing to it, automatically and as default, all
> the caller's global variables to act as module's global variables?
> thanks

module = __import__('module', globals=globals())

I think that's what you're looking for.

- alex23


From Scott.Daniels at Acm.Org  Sun May 25 15:41:28 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 12:41:28 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <87ve139oth.fsf@benfinney.id.au>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<87ve139oth.fsf@benfinney.id.au>
Message-ID: <ZZ-dndA6oPVNI6TVnZ2dnUVZ_gCdnZ2d@pdx.net>

Ben Finney wrote:
> David <wizzardx at gmail.com> writes:
>> You need to justify the extra time spent on writing test code.
> 
> From the perspective of someone who once thought this way, and then
> dug in and did Behaviour Driven Development, I can tell you the time
> is entirely justified: by better design, more maintainable code,
> higher confidence when speaking to customers, high visibility of
> progress toward completion, freedom to refactor code when it needs it,
> and many other benefits.

David,  here's another way to convince yourself you have the time:
For the next week, count how many times you repeat the same "hand-test"
of some code on a subsequent version.  Think of how much time that can
add up to if you no longer do that; you had-tesing time is subtracting
from the time you have to do unit tests.

--Scott David Daniels
Scott.Daniels at Acm.Org


From wizzardx at gmail.com  Sun May  4 14:25:03 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:25:03 +0200
Subject: HTTP Error code Info
In-Reply-To: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>
References: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>
Message-ID: <18c1e6480805041125se5a1cdfxbe534f108d7f57d1@mail.gmail.com>

> block.  Is there any better way to get the HTTP Error code using urllib2
> lib. Something like know the  exact  response number (200, 404 etc) without
> the above block.

Python libraries usually throw exceptions to indicate error conditions.

If this is a problem in your app then can write a wrapper function
which captures the HTTPError exception, extracts the code, and returns
it to the caller.

David.


From robert.kern at gmail.com  Fri May  2 16:15:07 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 02 May 2008 15:15:07 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <CeuSj.107251$rd2.30692@pd7urf3no>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <fvfsoc$c4f$1@ger.gmane.org>

Yves Dorfsman wrote:
> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python
> 
> Why is one preferred over the other one ?

Caveat: I've only read *most* of this thread, so maybe someone else has already 
made the following point.

It depends on the context. Ultimately, when your script is installed, it (almost 
certainly) should point to the precise Python executable the installer intends 
it to run on. One of the features of distutils is that it will *rewrite* 
"#!/usr/bin/env python" to use the exact executable that the installer used to 
execute the setup.py.

So *as a developer* I recommend writing your scripts with "#!/usr/bin/env 
python". This lets distutils select the correct executable, and it lets your 
users play around with your scripts prior to installation without needing to 
rewrite the shebang line manually. I hate trying out someone's code just to find 
that that they hardcoded /usr/local/bin/python2.3. If you aren't using distutils 
to install for some reason, you might want to recommend that the installer 
change the shebang line in your installation instructions.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From michael.hines at yale.edu  Sun May 25 09:37:15 2008
From: michael.hines at yale.edu (Michael Hines)
Date: Sun, 25 May 2008 09:37:15 -0400
Subject: raising an exception when multiple inheritance involves same
	baseThank
Message-ID: <1211722635.13961.57.camel@localhost.localdomain>

Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
not multiple inheritance per se I prohibit but only multiple inheritance
involving more than one HocObject class, I replaced your len(bases) > 1
test with
<code>
    m = False
    for b in bases :
      if hasattr(b, '__mro__'):
        for bb in b.__mro__ :
          if bb == MetaHocObject.ho :
            if m == True:
              raise Exception("Inheritance of multiple HocObject not
allowed")
            m = True

</code>
to get

class A(HocObject): pass

class B(object): pass

class C(): pass

class D(C, B, HocObject): pass # ok

class D(C, A, HocObject): pass # fail

When I fold this idea into my code I may even try to eliminate the class
factory aspect of
class Foo(hclass(h.Vector))
in favor of
class Foo(h.Vector)

Thanks again,
Michael




From matthieu.brucher at gmail.com  Thu May 29 12:21:19 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Thu, 29 May 2008 18:21:19 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805290921s4f35a624qb83a47a9c0768425@mail.gmail.com>

Hi,

New style classes should be put as the default. This is what I did, based on
the principle that new classes were introduces in Python 2.2 and that we are
now at 2.5 and soon 2.6.
Tutorials that use old style classes may be old and perhaps won't be updated
ever. That's not a problem. Just tell people that there are two styles, but
that new style classes are far more powerful and do what you think they
should do.

Matthieu

2008/5/29 <allendowney at gmail.com>:

> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From matt.trevor at gmail.com  Thu May 22 20:44:55 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:44:55 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <08a42153-573a-431c-bcc7-485ccf5b8f9c@b5g2000pri.googlegroups.com>

On May 23, 2:14 am, cm_gui <cmg... at gmail.com> wrote:
> I've yet to see a web application written in Python which is really
> fast.

Then stop looking at your own inept Python code and open your eyes.



From saptarshi.guha at gmail.com  Mon May 19 03:14:25 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Mon, 19 May 2008 00:14:25 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<69ckkgF31kls5U1@mid.uni-berlin.de>
Message-ID: <acb42f90-a025-4b02-81fa-7ad0a8560665@26g2000hsk.googlegroups.com>

Yes, that could be the case. Browsing through hadoop's source, i see
stdin in the above code is reading from piped Java DataOutputStream.
I read of a libray on the net Javadata.py that reads this but it has
disappeared.
What is involved in reading from a Dataoutputstream?

Thank you
Sapsi


From cameronlarue at gmail.com  Fri May 30 17:53:18 2008
From: cameronlarue at gmail.com (Cameron)
Date: Fri, 30 May 2008 14:53:18 -0700 (PDT)
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<6ab4u7F35bmisU1@mid.uni-berlin.de>
Message-ID: <11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>

On May 30, 1:04?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Cameron schrieb:
>
>
>
> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
> > Graham article</a> and he builds an accumuator generator function in
> > the appendix. His looks like this:
>
> > <pre>
> > def foo(n):
> > ? s = [n]
> > ? def bar(i):
> > ? ? s[0] += i
> > ? ? return s[0]
> > ? return bar
> > </pre>
>
> > Why does that work, but not this:
>
> > <pre>
> > def foo(n):
> > ? s = n
> > ? def bar(i):
> > ? ? s += i
> > ? ? return s
> > ? return bar
> > </pre>
>
> Because python's static analysis infers s as being a variable local to
> bar in the second case - so you can't modify it in the outer scope.
>
> In the future, you may declare
>
> def bar(i):
> ? ? ?nonlocal s
> ? ? ?...
>
> Diez

thanks for the response. Just to make sure I understand- Is the reason
it works in the first case because s[0] is undefined at that point (in
bar), and so python looks in the outer scope and finds it there?

Cameron



From bignose+hates-spam at benfinney.id.au  Mon May 19 19:05:34 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 May 2008 09:05:34 +1000
Subject: unittest, how to recursively run tests?
References: <08e8e41a-cb7e-45c4-a250-133826f02144@a9g2000prl.googlegroups.com>
Message-ID: <87bq31j3nl.fsf@benfinney.id.au>

fredbasset1000 at gmail.com writes:

> Does anyone know of a good way to execute all unit tests present in a
> project from the project root dir?
> Ideally I'd like a mechanism that does not require the tests/files to
> be manually listed in the source (e.g. via the suite mechanism).

nose: A discovery-based unittest extension.

    <URL:http://somethingaboutorange.com/mrl/projects/nose/>

Available in Debian GNU/Linux in the 'python-nose' package; probably
available in most others too.

-- 
 \         "Simplicity and elegance are unpopular because they require |
  `\           hard work and discipline to achieve and education to be |
_o__)                                appreciated." ?Edsger W. Dijkstra |
Ben Finney


From tavares at fe.up.pt  Fri May  9 14:06:12 2008
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: Fri, 9 May 2008 11:06:12 -0700 (PDT)
Subject: =?windows-1252?Q?Special_Track_=93Computational_Bioimaging_and_Visual?=
	=?windows-1252?Q?ization=94_within_the_ISVC08_USA_=2D_Announce_=26_Call_for_Papers?=
Message-ID: <d439ab68-1257-4951-90f3-665ebeba97ce@f36g2000hsa.googlegroups.com>

-----------------------------------------------------------------------------------------------------------------------------------------

(Apologies for cross-posting)

Special Track ?Computational Bioimaging and Visualization?
International Symposium on Visual Computing (ISVC08)
Las Vegas, Nevada, USA, December 1-3, 2008
http://www.isvc.net

We would appreciate if you could distribute this information by your
colleagues and co-workers.

-----------------------------------------------------------------------------------------------------------------------------------------

Dear Colleague,

Within the ISVC08 - International Symposium on Visual Computing
(http://www.isvc.net), to be held in Las Vegas, Nevada, USA, in
December 1-3, 2008, we are organizing the Special Track ?Computational
Bioimaging and Visualization?.
The main goal of the Special Track ?Computational Bioimaging and
Visualization? is to bring together researchers involved in the
related fields (Image Acquisition, Image Segmentation, Objects
Tracking, Objects Matching, Shape Reconstruction, Motion and
Deformation Analysis, Medical Imaging, Scientific Visualization,
Software Development, Grid Computing, etc.), in order to set the major
lines of development for the near future.
Therefore, this Special Track will bring researchers representing
various fields related to Computational Vision, Computer Graphics,
Computational Mechanics, Scientific Visualization, Mathematics,
Statistics, Medical Imaging, etc. Thus, it will endeavor to contribute
to obtain better solutions for more realistic computational ?living?
models from images, and attempts to establish a bridge between the
researchers from these diverse fields.

Due to your research activities in those fields, we would like to
invite you to submit your work and participate in the Special Track
?Computational Bioimaging and Visualization?.


Topics

In this Special Track the following topics will be considered (not
limited to):

- Image Processing and Analysis for Computational Bioimaging and
Visualization;
- Segmentation, Reconstruction, Tracking and Motion Analyse in Medical
Images;
- Biomedical Signal and Image Acquisition and Processing;
- Objects Simulation and Virtual Reality;
- Computer Aided Diagnosis, Surgery, Therapy, Treatment and
Telemedicine Systems;
- Software Development for Computational Bioimaging and Visualization;
- Grid and High Performance Computing for Computational Bioimaging and
Visualization.

Submission/Proceedings

Instructions for authors are available in the website of ISVC'08
(http://www.isvc.net/author.html).
Authors should submit electronically their contributions through the
website of ISVC'08 (http://www.isvc.net), selecting the Special Track
?Computational Bioimaging and Visualization?.
Accepted papers will appear in the symposium proceedings which will be
published by Springer-Verlag in the Lecture Notes in Computer Science
(LNCS) series.

Important dates

- Submission deadline: July 21, 2008;
- Notification of acceptance: September 1, 2008;
- Camera-ready version: September 15, 2008.

Scientific Committee

Alberto De Santis, Italy
Ana Mafalda Reis, Portugal
Arrate Mu?oz Barrutia, Spain
Barbara Caputo, Switzerland
Chang-Tsun Li, UK
Christos E. Constantinou, USA
Constantine Kotropoulos, Greece
Daniela Iacoviello, Italy
Dinggang Shen, USA
Eduardo Borges Pires, Portugal
Enrique Alegre Guti?rrez, Spain
Filipa Sousa, Portugal
Francisco Perales, Spain
Gerhard A. Holzapfel, Sweden
H?lder C. Rodrigues, Portugal
Hemerson Pistori, Brasil
Jo?o Manuel R. S. Tavares, Portugal
Jorge M. G. Barbosa, Portugal
Jorge S. Marques, Portugal
Jose M. Garc?a Aznar, Spain
Lu?s Paulo Reis, Portugal
Manuel Gonz?lez Hidalgo, Spain
Maria Elizete Kunkel, Germany
Michel A. Audette, Germany
Miguel Angel Guevara, Cuba
Patrick Dubois, France
Renato M. N. Jorge, Portugal
Reneta P. Barneva, USA
Roberto Bellotti, Italy
Sabina Tangaro, Italy
Samrat Goswami, USA
S?nia I. Gon?alves-Verheij, The Netherlands
Valentin Brimkov, USA
Yongjie Zhan, USA
Xavier Roca Marv?, Spain


With kind regards,

Jo?o Manuel R. S. Tavares - University of Porto, Portugal
(tavares at fe.up.pt)
Renato Natal Jorge - University of Porto, Portugal (rnatal at fe.up.pt)
Samrat Goswami - University of Texas at Austin, USA (tarmas at gmail.com)
(Organizers of the Special Track ?Computational Bioimaging and
Visualization)


From Sengly.Heng at gmail.com  Sun May 18 00:49:41 2008
From: Sengly.Heng at gmail.com (Sengly)
Date: Sat, 17 May 2008 21:49:41 -0700 (PDT)
Subject: Python library for clustering from distance vector
Message-ID: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>

Dear all,

I am looking for a python library which can cluster similar objects
into their respective groups given their similarity score of each two
of them. I have searched the group but I couldn't find any helpful
information yet.

Any suggestion is appreciated. Also, if you know any specific group
that I should post this message, please also suggest.

Thank you.

Sengly


From gnewsg at gmail.com  Sun May  4 10:49:55 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sun, 4 May 2008 07:49:55 -0700 (PDT)
Subject: Determine socket family at runtime
Message-ID: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>

Hi there,
since the socket.socket.family attribute has been introduced only in
Python 2.5 and I need to have my application to be backward compatible
with Python 2.3 and 2.4 I'd like to know how could I determine the
family of a socket.socket instance which may be AF_INET or AF_INET6.
Is there some kind of getsockopt() directive I could use?
For now I've been able to determine the family by using:

# self.socket = a connected socket.socket instance
ip, port = self.socket.getsockname()[0:2]
af = socket.getaddrinfo(ip, port)[0][0]

...but I'd like to know if some other solution is preferable.



Thanks.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From inhahe at gmail.com  Tue May 27 02:42:42 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 27 May 2008 02:42:42 -0400
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<mailman.1634.1211868017.12834.python-list@python.org>
Message-ID: <m2O_j.17782$hv2.6558@bignews5.bellsouth.net>

Well, I just need it once in a while.  Actually now is the only time I 
remember.  The last time what I needed was a file name extension.  I want a 
string called headers, but I want to derive a dict from it, also called 
headers.  So I figured the string would be called strHeaders, and the dict, 
dctHeaders probably, but when a precedent for something like that exists, I 
like to use it.

"Kam-Hung Soh" <kamhung.soh at gmail.com> wrote in message 
news:mailman.1634.1211868017.12834.python-list at python.org...
> inhahe wrote:
>> Does anybody know of a list for canonical prefixes to use for hungarian 
>> notation in Python?  Not that I plan to name all my variables with 
>> hungarian notation, but just for when it's appropriate.
>
> I used simple Hungarian notation when I started programming in Python 
> (e.g. "s" for strings, "l" for lists, "d" for dictionaries).  As my 
> programming style became more "Pythonic" and I chose better variable 
> names, I stopped using Hungarian notation.
>
> YMMV.
>
> -- 
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>
> 




From skanemupp at yahoo.se  Tue May 27 21:20:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 27 May 2008 18:20:06 -0700 (PDT)
Subject: confused by HTMLParser class
Message-ID: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>

tried all kinds of combos to get this to work.


http://docs.python.org/lib/module-HTMLParser.html



from HTMLParser import HTMLParser

class MyHTMLParser(HTMLParser):

    def handle_starttag(self, tag, attrs):
        print "Encountered the beginning of a %s tag" % tag

    def handle_endtag(self, tag):
        print "Encountered the end of a %s tag" % tag


from HTMLParser import HTMLParser
import urllib
import myhtmlparser

x = MyHTMLParser(HTMLParser())
site = urllib.urlopen("http://docs.python.org/lib/module-
HTMLParser.html")
for row in site:
    print x.handle_starttag()


From stanc at al.com.au  Thu May  1 01:16:15 2008
From: stanc at al.com.au (Astan Chee)
Date: Thu, 01 May 2008 15:16:15 +1000
Subject: tool to calculate color combination
In-Reply-To: <48193734.4010108@al.com.au>
References: <48193734.4010108@al.com.au>
Message-ID: <4819521F.70609@al.com.au>

Dont worry about this. I've figured it out. Rather simple :
red = sum of for each red (50/100) * 1
green = sum of for each green (50/100) * 0
blue = sum of for each blue(50/100) * 0

Astan Chee wrote:
> Hi,
> I was just wondering if there is a tool/script in python that allows 
> me to do color calculations; specifically, when I add them.
> Also I was thinking that for this to work other than a simple way, 
> some form of measure is included. e.g 50% red(1,0,0) + 50% 
> yellow(1,1,0) =  100% orange(1,0.7,0)
> Is there such a tool in python?
> Thanks for any information
> Astan
>

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From jkrukoff at ltgc.com  Thu May 15 19:42:59 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:42:59 -0600
Subject: no inputstream?
In-Reply-To: <1210894364.3312.10.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>  <1210894364.3312.10.camel@jmk>
Message-ID: <1210894979.3312.14.camel@jmk>


On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > > >
> > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > i buffer and parse.  apologies if i misrepresented my code!
> > > >
> > > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > work:
> > > >
> > > > > from mutagen.mp3 import MP3
> > > > > id3tags = MP3(urllib2.urlopen(URL))
> > > >
> > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > string or buffer, instance found".  does this mean i need to convert
> > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > > directory" errors, with a few HTTP 404s.
> > > >
> > > > [snip]
> > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > contents.
> > > 
> > > cool, so how do i give it the path, if not in the form of a URL
> > > string?  maybe this is obvious...
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > 
> > It doesn't look like you can, with mutagen. So, time to find a different
> > library that supports arbitrary file objects instead of only file paths.
> > I'd suggest starting here:
> > http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> > 
> > Possibly one with actual documentation, since that would also be a step
> > up from mutagen.
> > 
> 
> After a bit of time looking around, looks like nearly all the python id3
> modules expect to work with filenames, instead of file objects.
> 
> I can't vouch for it, and the documentation still looks sparse, but this
> module at least looks capable of accepting a file object:
> http://pypi.python.org/pypi/tagpy
> 
> Looks like it'd be a challenge to build if you're on windows, since it
> depends on an external library.
> 
> Alternately, you could probably create a subclass of the mutagen stuff
> that used an existing file object instead of opening a new one. No idea
> what that might break, but seems like it would be worth a try.
> 
> As last ditch option, could write the first few kb of the file out to a
> temp file and see if mutagen will load the partial file.
> 

Okay, now I'm officially spending too much time looking through this
stuff.

However, looks like the "load" method of the MP3 class is what you'd
want to override to change mutagen's file loading behavior. Probably
pass the URL as the filename, and take a cut & paste version of the
default load method from ID3FileType and change it to use urllib2 to
open it instead of a local file open.

Might work. Might not. No warranty express or implied.
-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From mrkafk at gmail.com  Sat May  3 19:27:25 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 16:27:25 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <f3d28eb3-dc40-4e33-87ea-ed6844d5bdc9@m3g2000hsc.googlegroups.com>

Assuming all the values are unique:

>>> a={1:'a', 2:'b', 3:'c'}

>>> dict(zip(a.keys(), a.values()))

{1: 'a', 2: 'b', 3: 'c'}

The problem is you obviously can't assume that in most cases.

Still, zip() is very useful function.


From Lie.1296 at gmail.com  Wed May 14 02:08:40 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 23:08:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
Message-ID: <6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com>

On May 14, 12:51?pm, Lie <Lie.1... at gmail.com> wrote:
> And your 8 by 8 cross compiler doesn't impress me at all, they're all
> based on x86/IA-32 architecture which is quite similar, no PowerPC,
> SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> single language compiler instead of three dimensional compiler that
> GCC is (cross platform, cross target platform, cross language).


And to add, I also need to mention that Python doesn't need to be
compiled at all, its py and pyo file is architecture independent.
Unlike some languages that still need to be compiled.



From wuwei23 at gmail.com  Mon May 26 20:48:41 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 17:48:41 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <99f5d4c8-93de-4b69-a591-a5cd55c50efe@x1g2000prh.googlegroups.com>

On May 27, 6:02 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.

Have you considered using the Bridge pattern to separate your
interface from your implementation?

    class Implementation:
        def private_method(self):
            raise NotImplementedError

    class Interface:
        def __init__(self):
            self.imp = Implementation()
        def public_method(self):
            self.imp.private_method()

No offensive _methods on the interface, and the implementation is
still open for consenting adults to tinker with.


From joe.p.cool at googlemail.com  Tue May 20 15:22:10 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Tue, 20 May 2008 12:22:10 -0700 (PDT)
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
Message-ID: <a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com>

Ludwig Miniatur wrote:
> For example:
> #!/usr/bin/env python
>
> from parser import suite, ast2list
> fh = file(__file__)
> s = fh.read()
> fh.close()
> ast = suite(s)
>
> while False:
>   print "hello world"
> # comment
>
> Looks like a little bug in parser; but what I don't understand is that
> I thought parser was build with the current syntax of python.

I didn't read the grammar but I assume that Python grammar requires a
comment to have the form #.*<end-of-line>.
>
> So, why can python run the script (an it can if you comment out the
> line "ast = suite(s)") but parser can't?

The interpreter probably appends a newline after the input stream as a
friendly service :)

--
Joe



From sjmachin at lexicon.net  Thu May 15 11:21:24 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 15:21:24 GMT
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482c54f2$1@news.mel.dft.com.au>

Johny wrote:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

I have a module -- which I'm going to get around to releasing one of 
these days :-) -- which allows to read dBase III, dBase IV and Foxpro 
files (sequentially only, not randomly) and to write dBaseIII files 
sequentially. Index files if any are ignored.

Field types supported for reading:
C character
D date
F float
I integer (32 bits)
L logical
M memo (stored in a .DBT (dBase) or .FPT (FoxPro) file)
N number
T time

Writing supports only dBaseIII with C, D, L and N fields, but could be 
extended easily enough (I've never had the need). No index files are 
written.

E-mail me if you are interested.

Cheers,
John


From bronger at physik.rwth-aachen.de  Sat May 24 02:12:42 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 24 May 2008 08:12:42 +0200
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <87lk20telh.fsf@physik.rwth-aachen.de>

Hall?chen!

cm_gui writes:

> [...]
>
> if python is such a good programming/scripting language,
> why can't they build a faster interpreter/compiler engine?
> and beat php and zend.
> to the python team, rebuild your interpreter!
>
> torontolife.com is slow.

For me, torontolife.com is exactly as fast as Wikipedia.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:45:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:45:48 -0300
Subject: Combining several files
Message-ID: <op.uajqqmuqx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 17:45:57 -0300, CRAIG DALTON <CXDALTON at sentara.com>  
escribi?:

> I'm looking to append several text files in one director and out put the  
> combined files into another director. I'm new to Python and just can't  
> get it to work. So far I've been able to create a file in the desired  
> directory but it isn't pulling any of the data in the originating  
> directory. Could please look at my code and tell me what I'm doing wrong.
>
> import os,shutil
> f=open("c:\\output\\testing1.txt","a+")
> for r,d,fi in os.walk("c:\\test"):
>     for files in fi:
>         if files.endswith(".txt"):
>             g=open(os.path.join(r+,files))
>             shutil.copyfileobj(g,f)
>             g.close()
> f.close()
>
> Any help would be great.

Except the spurious + in join(r+,files), and the usage of "files" denoting  
a single file name, the code looks OK to me. Try adding a few print  
statements, showing the files and directories it is processing.

(Note: Next time, if you want to post a NEW question, create a NEW thread  
instead of replying to any random post...)

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Thu May  1 11:14:00 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 15:14:00 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <Xns9A91A511BFF4duncanbooth@127.0.0.1>

AlFire <spamgrinder.trylater at ggmail.com> wrote:

> But I still can not believe that +=1 is not a thread safe operation.
> 
> 
> Any clue?

The statement:

    	x+=1

is equivalent to:

      x = x.__iadd__(1)

i.e. a function call followed by an assignment.

If the object is mutable then this *may* be safe so long as you never do 
any other assignment to x (the __iadd__ method will return the object being 
mutated so the assignment would in this restricted case be a noop).

Integers are immutable, so the assignment must always rebind x to a new 
object. There is no way given Python's semantics that this could be thread 
safe.

Generating hundreds of threads is, BTW, a very good way to get poor 
performance on any system. Don't do that. Create a few threads and put the 
actions for those threads into a Queue. If you want the threads to execute 
in parallel investigate using sub-processes.

The threading module already has a function to return the number of Thread 
objects currently alive.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat May 10 08:36:08 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 10 May 2008 14:36:08 +0200
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
Message-ID: <68lj5oF2sudm7U1@mid.individual.net>

Gandalf wrote:

> how can i ran script with python

It depends on your web server configuration. To get your web server
execute Python code, there are several alternatives like

* CGI
* FastCGI
* mod_python

Regards,


Bj?rn

-- 
BOFH excuse #93:

Feature not yet implemented



From wizzardx at gmail.com  Tue May  6 05:07:11 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 11:07:11 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
Message-ID: <18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>

Hi Vlasta.

I had a look at your original mail.

I think your simpler (than XML) format is a good idea for now. At a
later stage you could change it to something like this:

<CUSTOM_TAG KC=12 KNJ=13 VCC=0...etc>text goes here, some more text</CUSTOM_TAG>
<CUSTOM_TAG KC=13 KNJ=14 VCC=1...etc>text goes here, some more text</CUSTOM_TAG>

And so on. This isn't much more verbose than your current syntax, and
it is (I think) valid XML that you can feed into other tools, etc.

As for internal representation, the sqllite table-like format seems to
suite your app well. Also, there may be a performance advantage (for
queries) since the actual searching takes place in optimized C code
(in C-friendly structures), rather than vanilla Python code (which
uses string dict lookups for a lot of things which C doesn't).

Have you benchmarked how long the sqllite version takes, as opposed to
a simple list of dicts like this?:

[{'line':123, 'KC':12, 'VCC':0, KNJ: 12, text: u'some text'},
 {'line':124, 'KC':13, 'VCC':1, KNJ: 13, text: u'some more text'},
 {'line':125, 'KC':14, 'VCC':2, KNJ: 14, text: u'some more text'},

 ... etc ....
]

(Note that I'm storing some values as ints rather than unicode)

In theory, if you enable psyco, this structure (even without dict
lookups) should be almost (or within a few orders at least) as fast as
sqlite (without db indexes).

Could you try that, and let me know how it perfoms?

As for optimization, here's a simple method which might help. I'm
basically simulating db indexes on all the fields:

1) Use the simple structure, as above (a list of dicts)

2) Add a dict for each field, which gives you a list of indexes into
the above structure, for each unique value

example (simplified) structure:

lookups = {
  'line': {123: [0,1,2], 124: [3,4,5].... etc}
  'KC': {12: [0,4,6], 13: [7,8,9]...etc}
  'VC': {14: [0,3,4], 15: [10,11,12] ... etc}
   ... etc
}


3) When the user searches on various criteria, look up all the
matches, and get intersections (using the 'set' module).

eg:

user searches for line 123, VC 15:

Your code:

a) Looks up line 13 indexes (0,1,2), and adds them to a set object
b) Looks up VC 15 indexes (10,11,12), and adds them to another set object
c) Gets the intersection of those sets (see python docs) (in this case
no results, but you get the idea)
d) Gives those results to the user

In theory this should perform well.

Could you try this and let me know how well it works?

David


From http  Thu May 15 04:15:09 2008
From: http (Paul Rubin)
Date: 15 May 2008 01:15:09 -0700
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <7x3aokhtki.fsf@ruckus.brouhaha.com>

urikaluzhny <ukaluzhny at nds.com> writes:
> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is there?

itertools.takewhile(condition, seq)


From inhahe at gmail.com  Wed May 21 03:09:38 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 03:09:38 -0400
Subject: Running programs under a python program...
References: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>
Message-ID: <mUPYj.13098$Xv3.6932@bignews4.bellsouth.net>

maybe you could instead of killing the program  stop the loop that starts 
new processes and start one that runs until the last process ends?

also, if you killed the program but stdout was still set to fd and stderr 
was still set to subprocesses.STDOUT, what would happen when those two 
objects disappeared?  wouldn't the processes crash or something?

i dunno much about this though, maybe there's some way

<samslists at gmail.com> wrote in message 
news:43c19b29-878a-41b8-b2c9-48b5d91233c3 at t12g2000prg.googlegroups.com...
> So I have a python program that runs a bunch of other programs....it
> then loops forever, occasionally executing other programs.
>
> To run each of these programs my python code executes:
> subprocess.Popen(command_line, shell=True, stdout=fd,
> stderr=subprocess.STDOUT)
>
> where command_line is an appropriate command line.  :)
>
> Now my problem is when I abort this program it kills off all the child
> processes I've started. In this case I don't want that.   How can I
> stop the child processes from dieing when I kill off the parent?
>
> Thanks! 




From waldemar.osuch at gmail.com  Wed May 14 12:59:35 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Wed, 14 May 2008 09:59:35 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
References: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>
Message-ID: <c36592e2-8a07-4445-9d71-bfffd6d807fd@27g2000hsf.googlegroups.com>

On May 13, 1:02 pm, Jennifer Duerr <jenn.du... at gmail.com> wrote:
> All,
>
> I need help concerning SOAP, Python and XML. I am very new to this, so
> dumbing it down for me will not offend me!
>
> I'm using Python and want to send a user-inputted string to an
> existing Java web app that
> will output results to XML. I need to capture elements of the XML and
> put
> the info into a table. (say I send a single/simple address string to
> this
> webservice/geocode, which then returns numerous possible matches with
> XY
> values and score values, and I want to capture that into a table)
>
> How do I go about doing this? I'm told I need to use SOAP. I
> discovered that
> the best module to use is ZSI (please correct me if I'm wrong). I have
> installed the necessary module. Examples I have seen are plenty and
> all so different, its not clear to me how to go about.  I have been
> spinning my wheels for too long on this!
>
> Can someone provide some example code similar to what I need to do? Or
> any
> guidance would be appreciated.
>
> Thanks!

It looks like you have three tasks here:
 - get data
 - parse it
 - store it

SOAP could be the means to accomplish only the first one.

If the service you use exposes the functionality using XML-RPC or some
REST-ful methods I would try them first.  If it does not, then
you are stuck with SOAP. Using SOAP in Python is currently
not as straightforward as it could be.

You have chosen to use ZSI and that is fine choice.
In documentation look for "wsdl2py".
Given a URL to a WSDL file it will generate stub class definition
with methods corresponding to the SOAP service methods.
In your code you would instantiate the class, call the method you want
and grab the payload.  Your first task is done.

>From what I understand the payload will be XML that will need to be
parsed.  For that you could use the excellent ElementTree

If I were you I would investigate suds (https://fedorahosted.org/suds)
It promises to be easier to use than ZSI.  The README has the usage
example.


Waldemar


From upton at virginia.edu  Thu May 22 13:24:12 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 13:24:12 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <5504f9ac0805221024r5d5095v26cd33c2aa950d37@mail.gmail.com>

On Thu, May 22, 2008 at 12:14 PM, cm_gui <cmgui2 at gmail.com> wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Really fast, or fast enough?  Because "fast enough" is all that really
matters.  I don't notice any difference in HTML load time between your
various examples, what's slower is downloading all of the thumbnails
or doing AJAX calls.


From gagsl-py2 at yahoo.com.ar  Mon May 12 00:10:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 01:10:35 -0300
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
Message-ID: <op.ua0wjxqnx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 13:16:25 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> the only issue i have now is that it takes a long time for 100 threads
> to initialize that connection (>5 minutes) - and as i'm doing this on
> a webserver any time i update the code i have to restart all those
> threads, which i'm doing right now in a for loop.  is there any way I
> can keep the thread stuff separate from the rest of the code for this
> file, yet allow access?

Like using a separate thread to create the other 100?

-- 
Gabriel Genellina



From kyosohma at gmail.com  Fri May  9 10:05:37 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:05:37 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com> 
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com> 
	<mailman.867.1210341764.12834.python-list@python.org>
Message-ID: <0bb46bdf-28bd-423a-91ef-83d31dcb4c57@l42g2000hsc.googlegroups.com>

On May 9, 9:02?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Fri, 09 May 2008 10:40:38 -0300, Clive_S <clives... at yahoo.co.uk> escribi?:
>
> > I downloaded (from Python) and installed python-2.4.4.msi
>
> > I have python and pythonw.exe in the Python 24 folder (but not in my
> > start menu).
> > When I click on the pythonw.exe it is not launched??
>
> pythonw.exe is NOT PythonWin - it's a consoleless version of the standard Python interpreter.
> PythonWin is part of the pywin32 package that you can download fromhttps://sourceforge.net/projects/pywin32/(make sure you get the right version)
>
> --
> Gabriel Genellina

Ah. That's where I got it. Sorry for promulgating my own confusion!

Mike


From Russ.Paielli at gmail.com  Mon May 26 16:02:21 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Mon, 26 May 2008 13:02:21 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
Message-ID: <039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>

On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk> escribi?:
>
> >> I am also bothered a bit by the seeming inconsistency of the rules for
> >> the single underscore. When used at file scope, they make the variable
> >> or function invisible outside the module, but when used at class
> >> scope, the "underscored" variables or functions are still fully
> >> visible. For those who claim that the client should be left to decide
> >> what to use, why is the client prohibited from using underscored
> >> variables at file scope?
>
> > I don't remember why this is. I'll leave you to track down the
> > rationale for this particular behaviour. ;-)
>
> There is no rationale because this is not how it works...
> You can:
> - import a module and access *all* of their names, even names prefixed with an underscore
> - import any name from a module, even if it starts with an underscore
> - import * from a module, and it will import all names listed in __all__, even if they start with an underscore
>
> Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.
>
> --
> Gabriel Genellina


Well, that's interesting, but it's not particularly relevant to the
original point. By default, underscored variables at file scope are
not made visible by importing the module in which they appear. But
underscored member variables of a class *are* made visible to the
client by default. That's seems at least slightly inconsistent to me.

The issue here, for me at least, is not whether the data or methods
should be absolutely hidden from the client. I'm perfectly willing to
say that the client should have a back door -- or even a side door --
to get access to "private" data or methods.

But I also believe that some standard way should be available in the
language to tell the client (and readers of the code) which methods
are *intended* for internal use only. And that method should be based
on more than a naming convention. Why? Because (1) I don't like
leading underscores in my identifiers, and (2) I think I should be
free to choose my identifiers independently from their properties.

Is this a major issue? No. Is it a significant issue. Yes, I think so.

Here's another suggestion. Why not use "priv" as shorthand for
"private"? Then,

priv height = 24

at file scope would make "height" invisible outside the module by
default. And the same line in a class definition would give "height"
the equivalent of "protected" status in C++.

I think "height" looks cleaner than "_height". And isn't clean code a
fundamental aspect of Python?


From miller.paul.w at gmail.com  Wed May 14 01:21:12 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 22:21:12 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<e6c623cf-73b7-4ebc-bd68-43f778fac53d@b64g2000hsa.googlegroups.com>
Message-ID: <c6f66b55-5229-4f92-9e54-124d243f530c@z72g2000hsb.googlegroups.com>

On May 12, 3:55 am, bock... at virgilio.it wrote:

> As a test, I would leave out the last sentence, and see how many
> people (and how fast) figure out than a number can be multiple of
> three _and_ five and that the requirement is somehow incomplete ...

Actually, if you leave off the last sentence, what the program should
do when it encounters a multiple of 15 is print "Fizz" and print
"Buzz", in some order, because all multiples of 15 are multiples of 3
and 5.  The only difference is, if you don't specify to print
"FizzBuzz" for a multiple of 15, it's perfectly legal to print
"BuzzFizz". :-)

On the other hand, asking for clarification regarding multiples of 15
at least shows the applicant is thinking.



From python at bdurham.com  Wed May  7 14:32:01 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 14:32:01 -0400
Subject: Generate labels for a multi-level outline (THANK-YOU!)
In-Reply-To: <d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
Message-ID: <1210185121.25063.1251940567@webmail.messagingengine.com>

Castironpi and Dennis,

WOW! Thank you very much for your examples!!!

I wasn't trolling for free development, just whether such a library
existed and/or design ideas (basic object or generator).

I had started to develop my own solution which was much more complicated
(re: ugly) than your 2 very elegant approaches.

Its interesting to compare your two very different approaches. I will to
spend some more time studying your techniques before I choose a final
approach.

Thank you both again. I'm learning a lot of Python by studying your
examples! :)

Malcolm


From wuwei23 at gmail.com  Fri May 23 22:10:23 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:10:23 -0700 (PDT)
Subject: function returns , but variable values has not changed in the 
	interactive prompt
References: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>
Message-ID: <10c82981-6914-459f-bbf6-5152d94c793b@w1g2000prd.googlegroups.com>

On May 24, 5:04 am, davidj411 <davidj... at gmail.com> wrote:
> if you run execfile function to run a python script and that script
> has variables and functions, should't those variable change in the
> interactive prompt too?

Yes.

>cat a.py
a = 7
b = 'seven'

Python 2.5.1 (r251:54863, May  1 2007, 17:47:05) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> execfile('a.py')
>>> a
7
>>> b
'seven'

I think you need to show us the actual code in question, rather than
the odd behaviour you're experiencing. It's generally easier to debug
real code over blackboxing behaviour.


From yves at zioup.com  Thu May  1 21:36:34 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 01:36:34 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
Message-ID: <CeuSj.107251$rd2.30692@pd7urf3no>

On UNIX, some people use
#!/usr/bin/env python

While other use
#!/usr/bin/python

Why is one preferred over the other one ?

Thanks.

-- 
Yves.
http://www.SollerS.ca


From dave_140390 at hotmail.com  Wed May 28 06:02:51 2008
From: dave_140390 at hotmail.com (dave_140390 at hotmail.com)
Date: Wed, 28 May 2008 03:02:51 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
	<m2od6q4wl3.fsf@googlemail.com>
Message-ID: <1a781c74-f71c-4252-ad84-5d853de397ee@k30g2000hse.googlegroups.com>

> Shouldn't you do data = data.decode('utf8') ?

Yes, that's it! Thanks.

-- dave


From tjreedy at udel.edu  Mon May 12 18:11:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 18:11:48 -0400
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <g0afb2$cdi$1@ger.gmane.org>


"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.ua04evz4x6zn5v at a98gizw.cpe.telecentro.net.ar...
En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> 
escribi?:

| (We used this question last year - some people gave a sensible answer
| in less | than 5 minutes, but others did not even know how to start)

Another approach  I do not remember seeing here (under 10 minutes)

fb = ('FizzBuzz', None, None, 'Fizz', None, 'Buzz', 'Fizz',
      None, None, 'Fizz', 'Buzz', None, 'Fizz', None, None)
for i in range(1,101): print(fb[i%15] or i) #3.0





From stefan_ml at behnel.de  Fri May 16 05:49:22 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 16 May 2008 11:49:22 +0200
Subject: Using file objects with elementtree
In-Reply-To: <67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
	<482C7D93.2080809@behnel.de>
	<67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>
Message-ID: <482D58A2.5080505@behnel.de>

castironpi wrote:
> [...], and making up words.  Blah?

"Blah" is not made up. Try again.

Stefan

PS: this might be getting slightly off-topic...


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:20:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:20:29 +0200
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
In-Reply-To: <4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>
	<mailman.628.1210050918.12834.python-list@python.org>
	<4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>
Message-ID: <482006b9$0$11058$426a74cc@news.free.fr>

s0suk3 at gmail.com a ?crit :
> On May 6, 12:14 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> (the convention is to use lowercase names for attributes: rawdata instead
>> of RawData)
>>
> 
> But at least put an underscore between the words (raw_data), or, if
> you like the OO world, make the subsequent words capitalized
> (rawData).

mixedCase convvnetion has nothing to do with OO.


From detlev at die-offenbachs.de  Mon May 19 05:50:17 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Mon, 19 May 2008 11:50:17 +0200
Subject: ANN: eric 4.1.4 released
Message-ID: <g0rigp$2nl$4@online.de>

Hi,

this is to inform all of you about the immediate availability of eric
4.1.4. It includes a fix for an API change of Qt 4.4, that caused eric4
to crash. Please update immediately.

As usual, it is available via
http://www.die-offenbachs.de/eric/index.html.

What is eric?
-------------
Eric is a Python (and Ruby) IDE, that comes with all batteries included.
For more details please see the above link.

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From Lie.1296 at gmail.com  Wed May 21 14:13:40 2008
From: Lie.1296 at gmail.com (Lie)
Date: Wed, 21 May 2008 11:13:40 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
Message-ID: <49b6a657-ff57-4314-85e7-37914496ca12@d19g2000prm.googlegroups.com>

On May 20, 10:42?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Mon, 19 May 2008 20:34:22 -0700 (PDT)
>
> notnorweg... at yahoo.se wrote:
> > i am confused.
>
> > x=5
> > y=5
>
> > x==y -> True
> > x is y -> True
>
> > shouldnt x is y return False since they shouldnt(dont?) point to the
> > same place in memory, they just store an equal value?
>
> For some immutable values (such as numbers and strings), Python will have separate variables reference the same object, as an optimization. This doesn't affect anything, since the numbers are immutable anyway and a shared reference won't create any unexpected changes.
>
> It also works with small, but not large, strings:
>
>
>
> >>> x = 'hello'
> >>> y = 'hello'
> >>> x == y
> True
> >>> x is y
> True
> >>> a = 'this is longer'
> >>> b = 'this is longer'
> >>> a == b
> True
> >>> a is b
> False
>
> In the above example, Python has created only one string called 'hello' and both x and y reference it. However, 'this is longer' is two completely different objects.

But the rule of thumb is: Don't rely on this optimization, it's an
implementation detail.


From usenet at technicalbloke.com  Fri May 16 11:40:49 2008
From: usenet at technicalbloke.com (Roger Heathcote)
Date: Fri, 16 May 2008 16:40:49 +0100
Subject: Thread killing - I know I know!
Message-ID: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>

Hello everyone, this is my first post so hello & please be gentle!

Despite many peoples insistence that allowing for the arbitrary killing 
of threads is a cardinal sin and although I have no particular threading 
problem to crack right now I remain interest in the taboo that is thread 
killing. The real world and it's data are messy and imperfect and I can 
think of several scenarios where it could be useful to be able to bump 
off a naughty thread, especially when using/testing unstable 3rd party 
modules and other code that is an unknown quantity.

With this in mind I am experimenting with a set of threading subclasses 
that would permit timeouts and the manual killing of threads. I'm trying 
to evaluate how robust such a scheme can be made and what the 
limitations would be in practice.

So far I can seemingly murder/timeout pure python threads that are stuck 
blocking for input and stuck in infinite loops but I'm guessing there 
are many more awkward cases. What I'm looking for are examples of 
code/modules that can get stuck in dead ends or might otherwise be 
problematic to terminate.

In particular I'd be interested to see if I could kill a non-returning c 
module. Of course naturally no one wants to be publishing buggy modules 
and the like so I am having trouble finding examples of misbehaving c 
code to explore further. I figure I could learn how to write c modules 
for python but, while it's something I'd like to know someday, I'm 
guessing that will be too long to fit into the immediate future :/ 
Consequently if anyone has detailed knowledge of what is and isn't 
fundamentally possible in the world of thread culling, or if you can 
point me to some gnarly/non-returning thread code to test with I would 
be forever grateful.

Oh yes, I'm working primarily with 2.5 on XP however I have access to 
linux & OSX boxen and I'd be interested to learn about problematic 
thread code for either of those platforms as well.

Thanks for reading,

Roger Heathcote - www.technicalbloke.com


From castironpi at gmail.com  Sun May 11 17:52:30 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 14:52:30 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
	<7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>
Message-ID: <a284d03b-159e-4aac-a60a-6aa3cec784fa@34g2000hsh.googlegroups.com>

On May 11, 5:05?am, alefajnie <devp... at gmail.com> wrote:
> > try arr[2][3] instead.
>
> > basically your version is trying to index an array with a tuple argument (2,3).
>
> > --irmen
>
> oh, you're right.
>
> btw, is any simple way to create multi-dimension array ?
> any built-in function ?

it is not clear that two-dim arrays are faster than hashes in all
implementations of Python, or in every general language, or if they're
the right symbol for your program.

>>> a= { }
>>> a[ 0, 1 ]= True
>>> a[ 4, 0 ]= True
>>> a[ 0, 1 ]
True

however, this one:

>>> a[ 2, 1 ]

results in a KeyError.  do you want a particular thing, or are you on
the clock?

if you want to define 'blanks', that takes time too.  is it initally
empty?


From miller.paul.w at gmail.com  Mon May 26 15:11:41 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:11:41 -0700 (PDT)
Subject: Storing objects in relational database
References: 3e9098aa-9f0d-4d33-9b08-7dc6cd1b8adc@w8g2000prd.googlegroups.com
Message-ID: <820aeaca-a899-40e6-a8b1-eb98564c912c@r66g2000hsg.googlegroups.com>

On May 24, 2:12?am, bukzor <workithar... at gmail.com> wrote:

> It's not a string it's a cStringIO.StringIO, ....

Just to reinforce this point, in general, you want to use cStringIO
when you need an object that has a "file-like" interface, but you want
to keep the results in memory.


From notnorwegian at yahoo.se  Tue May 20 16:58:06 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Tue, 20 May 2008 13:58:06 -0700 (PDT)
Subject: self.var hmm?
Message-ID: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>

class TaskGroup:
    def __init__(self):
        self.group = []

    def addTask(self, task):
        self.group.append(task)


is this wrong? i have a program thats too big to post but should i
just do group.append in addTask?

reason is when later doing TaskGroup.group i get None



From inhahe at gmail.com  Sun May 18 06:33:24 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:33:24 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <SATXj.11281$hv2.7858@bignews5.bellsouth.net>


>It is not clear that the first (cheapest best) human->computer language
>is a computer language, though if two were orthonormal >in comparison
>to life, Python's fine.  Not my first.

The utterly dry, closed, logical, definitive, hierarchical, consistent, 
determinate nature of a computer language is the only thing that will 
facilitate anything useful on something as utterly stupid (and not to 
mention logical, definite and determined) as a computer.

I mean it, computers are /really/ stupid.  They're literally
stupider than a bug.  We just like things we can control.

The requisites I have for a computer language are:

Efficiency (speed)
Elegance of syntax
Powerful (conceptual-wise) abstractions

Python has delicious abstractions that make doing a lot of things really 
easy and fun to think about.
Stackless Python adds even more to that with continuations.
Also Python's dynamic (another aspect of being powerful conceptual-wise)
But most of all, I love its syntax.  Guido is the awesome.
(BTW, I won't even use any language that uses := for assignment.  I just 
refuse.  I don't care what the language has.)

The speed/efficiency issue depends on the task at hand.  For most things I 
use Python.  But assembly isn't out of the question, and it's fun to code 
in.  I also find C/C++ an elegant language.  Most things just don't need 
that speed.   And Python is 50 times easier to code in than C/C++ and 1000 
times easier to debug in.

I also like C#.

My ideal language would be a natively compiling cross between C++ and 
Python.  Objects declared with a type would be statically typed, objects not 
declared with a type would be dynamically typed.  There would also be 
keywords to declare that class names won't be reassigned and class 
attributes won't be deleted.  Those attributes would be referred to by 
offset, not hast table keys.  f







From ivan.illarionov at gmail.com  Tue May 20 04:13:44 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:13:44 +0000 (UTC)
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org>
Message-ID: <g0u17n$1fec$1@news.mtu.ru>

On Mon, 19 May 2008 10:18:00 -0400, Poppy wrote:

> Thanks, since posting I  figured out how to interpret the histogram
> results, which seems to be the consensus in responses. I wrote a check
> image program and have been periodically calling it against a folder
> where I make a copy of our images used for production. My method right
> now is to check what we send for errors, but is not preventive.
> 
> Also I determined whitespace is not the only issue, any color that
> dominates. I'm considering rewriting this code below to setup bins, so
> if combined neighboring colors exceeds the threshold then reject the
> image. I have examples where half the image appears black, but actually
> varies throughout.
> 
> Since my image is RGB I'm looping through a 768 element list.

I suggest:
1. convert to greyscale
2. posterize
3. check the max(im.histogram())

-- Ivan


From torriem at gmail.com  Fri May  2 14:20:22 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 02 May 2008 12:20:22 -0600
Subject: Finally had to plonk google gorups.
In-Reply-To: <e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>	<87abjne42n.fsf@physik.rwth-aachen.de>	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>
	<87r6cncp4r.fsf@physik.rwth-aachen.de>	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
Message-ID: <481B5B66.9060904@gmail.com>

Mensanator wrote:
> On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>> Shawn Milochik wrote:
>>> How does one "plonk" stuff from Google Groups? Specifically, how
>>> can this be done in Gmail?
>> Set up a filter that looks for some phrase in the mail headers that
>> identifies messages originating from google groups.  Gmail's filters are
>> fairly flexible.  I'd probably just have it look for certain words.
>> Look at an e-mail's source (raw view) and particularly check in the
>> headers for things to filter by.
> 
> Why don't you just block all messages from Gmail?

Brilliant!  Seeing as he's asking about doing the filtering in Gmail
(implying it's use for his own posting and viewing the list) that would
work splendidly for him!  Or not.

Of course you're not likely to see this message either since I and many
folks on here post from gmail.

Spam comes mainly from Google Groups, not as much from Gmail in my
experience.


From dickinsm at gmail.com  Sun May 11 23:26:09 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 11 May 2008 20:26:09 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
Message-ID: <6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>

On May 11, 9:36?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> Do you have in mind any situations in which it is advantageous to have 0**0
> undefined?

(Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
then it's not at all clear that 0.**0. should be considered
well-defined. And since Python likes integer and floating-point
operations to match numerically (as far as possible), 0**0 then
also comes into question.

The big problem here is that the power operation is really trying
to combine two subtly different functionalities (integer powers
and real powers), with quite distinct use-cases, into a single
function.  Which leads to problems:  witness the mess that's
C99's pow specification:  why does it make sense for (-2.0)**2.0 to
return 4.0, while (-2.0)**1.999999999 returns NaN?  And why
should (-2.0)**infinity be well-defined?

It looks like that same mess is going to make it into IEEE 754r.
There were suggestions on the 754r mailing list to separate
the pow functionality out into two separate functions: pown
for integer powers and powr for real powers.  pown(0.0, 0) would
be 1, while powr(x, y) would be defined strictly as exp(y*log(x))
and so powr(0.,0.) would raise the invalid signal.

I have to admit that almost all my uses of ** are with
integer exponents, and I'd be very upset if anyone took
0**0 == 1 away...

Incidentally, the decimal module is slightly schizophrenic about
this:  Decimal(0)**Decimal(0) raises an exception, but
Decimal('Inf')**Decimal(0) returns Decimal(1).  Which doesn't
make a lot of sense, since every reason for making 0**0
undefined seems to apply equally well to infinity**0...

Mark



From castironpi at gmail.com  Tue May 13 07:27:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:27:17 -0700 (PDT)
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
	<g0bs1f$8o7$1@info.science.uva.nl>
Message-ID: <cc664c36-c80e-45af-b7be-9c0a4f3242dc@b1g2000hsg.googlegroups.com>

On May 13, 5:54?am, Paul Melis <p... at science.uva.nl> wrote:
> wxPytho... at gmail.com wrote:
> > Why is the ?\ ?backslash character frowned upon? Can I still use it in
> > Python 3.0 to achieve the same thing it was designed to do?
>
> Yes, it's still valid to use in a script.
>
> Seehttp://docs.python.org/dev/3.0/whatsnew/3.0.htmlfor the big changes
> coming with 3.0
>
> Paul

I have just discovered the escape key.  Do you honor it?


From afriere at yahoo.co.uk  Wed May  7 02:55:17 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 6 May 2008 23:55:17 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <620a2a56-040d-4edb-839b-ec7d9825a439@x19g2000prg.googlegroups.com>

On May 6, 7:43 pm, Max M <m... at mxm.dk> wrote:

> This is old in the sense that it has been a while since I wrote it. But
> it is virtually bug free, so nothing much is happening.
>
> The midi standard does not change so there is no real reason to
> change/upgrade it.

Maybe you should add a method somehwere that does nothing much,
increment the version number and give it a 2008 date? ;)


From kamhung.soh at gmail.com  Wed May  7 21:25:53 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 08 May 2008 11:25:53 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
Message-ID: <op.uas99gjvev04yd@melwxp23>

On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> Hi All,
>
> I wrote a program that takes a string sequence and finds all the words  
> inside a text file (one word per line) and prints them:
>
> def anagfind(letters): 	#find anagrams of these letters
> 	fin = open('text.txt')	#one word per line file
> 	wordbox = []		 #this is where the words will go
> 	for line in fin:
> 		word = line.strip()
> 		count = 0
> 		for char in letters:
> 			if char not in word:
> 				break
> 			else:
> 				count += 1
> 			if count == len(word):
> 				wordbox.append(word)
> 	return wordbox
>
> Now I'd like to modify the code to naturally find all anagrams inside a  
> wordlist.  What would be the best way to do this?  Using Hints?  Is it  
> possible to iterate over dict keys?  How can I make a dict that maps  
> from a set of letters to a list of words that are spelled from those  
> letters?  Wouldn't I need to make the set of letters a key in a dict?
>
> As always - Thanks for helping someone trying to learn...
>
> Dave
>

Suggestion: for each word, sort their characters and use them as the  
dictionary key.  If two words have the same combination of characters,  
then they are anagrams.  For example: "edam" and "made" are anagrams  
because they have the letters 'a', 'd', 'e' and 'm'.

Refer "Programming Pearls" by Jon Bentley.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From deets at nospam.web.de  Thu May 29 09:23:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 15:23:30 +0200
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
Message-ID: <6a7p3nF364tmpU1@mid.uni-berlin.de>

TYR wrote:

> I'm doing some data normalisation, which involves data from a Web site
> being extracted with BeautifulSoup, cleaned up with a regex, then
> having the current year as returned by time()'s tm_year attribute
> inserted, before the data is concatenated with string.join() and fed
> to time.strptime().
> 
> Here's some code:
> timeinput = re.split('[\s:-]', rawtime)
> print timeinput #trace statement
> print year #trace statement
> t = timeinput.insert(2, year)
> print t #trace statement
> t1 = string.join(t, '')
> timeobject = time.strptime(t1, "%d %b %Y %H %M")
> 
> year is a Unicode string; so is the data in rawtime (BeautifulSoup
> gives you Unicode, dammit). And here's the output:
> 
> [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> 2008 (OK, so the year is a year)
> None (...but what's this?)
> Traceback (most recent call last):
>   File "bothv2.py", line 71, in <module>
>     t1 = string.join(t, '')
>   File "/usr/lib/python2.5/string.py", line 316, in join
>     return sep.join(words)
> TypeError

First - don't use module string anymore. Use e.g.

''.join(t)

Second, you can only join strings. but year is an integer. So convert it to
a string first:

t = timeinput.insert(2, str(year))

Diez


From mnordhoff at mattnordhoff.com  Sat May 10 17:29:00 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sat, 10 May 2008 21:29:00 +0000
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <4826139C.8070602@mattnordhoff.com>

wxPythoner at gmail.com wrote:
> You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
> 
> [1]+  Stopped                 python

You can use Ctrl+C and Python will stop what it's doing and go back to
its main prompt.
-- 


From tjreedy at udel.edu  Wed May 14 17:57:33 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 17:57:33 -0400
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
Message-ID: <g0fn89$9vq$1@ger.gmane.org>


"Tal Einat" <tal.no.no.spam at gmail.com> wrote in message 
news:8885effd-12a6-4e35-9629-ec4028afaa2d at 2g2000hsn.googlegroups.com...
| Hi all,
|
| I just ran into this. In IDLE (Python 2.5), the call-tip for
| itertools.count is:
| "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"
|
| That's itertools.count.__init__.__doc__, while itertools.count.__doc__
| is the informative doc-string ("DS" henceforth):
| """count([firstval]) --> count object
|
| Return a count object whose .next() method returns consecutive
| integers starting from zero or, if specified, from firstval."""
|
|
| That seems very counter-intuitive to me - I would expect the DS for
| __init__ to explain how to use the constructor.
|
| IDLE's call-tip module obviously thinks so as it prefers the __init__
| DS to the class's DS. IPython does the opposite as far as I can tell,
| when I enter 'itertools.count?' it shows the class's DS, but shows
| nothing for a custom class whose __init__ has a DS while the class
| itself does not.
|
| I'm wondering what a call-tip mechanism should do when a class and its
| __init__ both have a DS. I'd be willing to work up a patch for IDLE's
| call-tip module to work better in this regard, or for itertools and
| similar classes in the stdlib, if needed.

Perhap IDLE should be changed, but I am not sure.  After more discussion 
here, if any, this would be worth a tracker item. 





From pecora at anvil.nrl.navy.mil  Mon May 19 15:09:59 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 19 May 2008 15:09:59 -0400
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <pecora-E07827.15095919052008@ra.nrl.navy.mil>

In article <hifYj.43082$4B6.9014 at newsfe14.ams2>,
 Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:

> Bruno Desthuilliers schreef:
> > 1/ being interpreted or compiled (for whatever definition of these 
> > terms) is not a property of a language, but a property of an 
> > implementation of a language.
> > 
> > 2/ actually, all known Python implementations compile to byte-code.
> > 
> 
> You keep saying that, and in theory you're right. But I'm still inclined 
> to disagree with it, since the practical reality is different. Python is 
> indeed compiled to byte code, but if you compare that byte code with 
> assembly code you'll see that there's a whole world of difference 
> between the two, largely because of the dynamical nature of Python. Fact 
> is that Python was designed from the start to run on a virtual machine, 
> not on the native hardware.
> 
> C OTOH was designed to be compiled to assembly code (or directly to 
> machine code) and as a result there are no (or virtually) no 
> implementations that interpret C or compile it to bytecode.


But how about this C/C++ interpreter.  Dr. Dobbs article:  
http://www.ddj.com/cpp/184402054.  Title and first two paragraphs:

Ch: A C/C++ Interpreter for Script Computing
Interactive computing in C 

Ch is a complete C interpreter that supports all language features and 
standard libraries of the ISO C90 Standard, but extends C with many 
high-level features such as string type and computational arrays as 
first-class objects.

For some tasks, C and its compile/ link/execute/debug process are not 
productive. As computer hardware becomes cheaper and faster, to be 
productive and cost effective, script computing in C/C++ can be an 
appealing solution. To this end, we have developed Ch, an embeddable 
C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D 
plotting, numerical computing, and embedded scripting [1].

-- 
-- Lou Pecora


From mauriceling at gmail.com  Tue May 27 19:31:17 2008
From: mauriceling at gmail.com (mauriceling@acm.org)
Date: Tue, 27 May 2008 16:31:17 -0700 (PDT)
Subject: [ANN] The Python Papers is moving to use Open Journal System
Message-ID: <932eed21-9450-46e0-94c3-c67dda16be66@b5g2000pri.googlegroups.com>

Some of our readers may be wondering about the reason why we had not
put up a call for interest for our next issue, Volume 3 Issue 2. The
Python Papers will always welcome interests and submissions with or
without a public call; just let us know by emails.

The Python Papers is nearing the end of its 2nd year and our continued
challenge is to expand its outreach, especially into index databases,
online repositories and libraries. After a few months of search, we
had decided to use Open Journal System (OJS) from the Public Knowledge
Project (http://pkp.sfu.ca/?q=ojs) to manage The Python Papers. We are
currently in the process of setting the system up in our web server
and is feverishly porting all back issues into it. Hence, we are
delaying our call for interest/submissions for June 2008. Instead, our
next issue will be set in August 2008 - a call for interest and
publishing timeline will be released soon.

We welcome any offer of assistance.

We hope that by using OJS, The Python Papers will conform to Open
Archive Initiative (OAI) which is a standard for metadata harvesting
of publications. We further hope that OAI will pave the way into
academic libraries and repositories.

The OJS site for The Python Papers is http://ojs.pythonpapers.org

We thank all authors and readers, and the computing/programming
community at large for your continued support.

Sit tight for your next issue in August.

Warm regards
Maurice Ling
Co-Editor-in-Chief, The Python Papers



From teroV at nowhere.invalid  Sun May 25 06:17:46 2008
From: teroV at nowhere.invalid (TeroV)
Date: Sun, 25 May 2008 13:17:46 +0300
Subject: access interactive namespace from module (shared namespace?)
In-Reply-To: <mailman.1564.1211709217.12834.python-list@python.org>
References: <mailman.1564.1211709217.12834.python-list@python.org>
Message-ID: <f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>

Ulrich Dorda wrote:
> I've got a probably embarrassing trivial problem with namespaces, but 
> couldn't solve it myself nor find an answer in the net. Hopefully one of 
> you guys can help me.
> 
> What I want to do:
> Use the interactive shell and e.g define the variable a there.
> Then load a module and access a from within.
> 
> e.g file "utest.py"
> 
> def doit():
>     print 2*a
> 
> in the shell:
> 
> import utest
> a=3
> utest.doit()  <- I want this to print 2*a, but of course obtain: <type 
> exceptions.NameError'>: global name 'a' is not defined
> 
> Any change I do to a in the shell should be seen from the doit() 
> function, any variable assignment I do in the doit() function should be 
> seen in the shell. I guess it's somehow a namespace sharing.
> 
> Actually the function doit() will contain an eval() function that should 
> evaluate a (via a gui) dynamically inserted expression.
> 
> Any one got a clue? (a clue what I try to say and how to help?!)
> 
> Thanks a lot in advance!!
> 
> Ulrich
> 
> 

Here is one way

#utest.py:
def doit(valuemap):
     print 2*valuemap['a']

Python 2.5.1 (r251:54863, Mar  7 2008, 04:10:12)
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> a = 4
 >>> import utest
 >>> utest.doit(locals())
8
 >>>


From dgetsman at amirehab.net  Wed May 21 17:19:56 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 14:19:56 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>

In my opinion, with the previous experience that you have in coding
that you've mentioned, you're probably better off if you minimize the
amount of new syntaxes you'll have to pick up.  Standard technique for
what you're trying to accomplish is more often than not Apache with
the PHP and MySQL support built in.  PHP has great support for
accessing a MySQL database, which is where the script would store and
load your entries (and/or other applicable data) from.  Then again,
you are really learning HTML, PHP, and MySQL at the same time, which
can be a pain in the ass.  There are some excellent books by O'Reilly
and Associates on just that subject, though.  They combine the PHP &
MySQL into one book that'll get you started and able to handle that
kind of task really quick.  The HTML syntax is going to be separate,
wherever you go.  It'll be simple if you want it dumping text to the
screen, and a pain in the ass if you want pretty formatting with
designs and text that lays out just in a certain area.

My suggestion, if you want to keep that gray meat sparking, is to go
with only html & php.  You could have the php dumping your entries
into date/time named textfiles on there when you're writing, and when
someone is reading, it just orders them sequentially by the date &
time in their filenames.

Then again, you learn the HTML+PHP+MySQL thing and you've got a skill
that you can market on Craigslist to a bunch of people for $20/hr
+.  :)

<a href="http://unix.derkeiler.com/Newsgroups/comp.sys.sun.apps/
2008-04/msg00000.html">
-Damon A. Getsman
Linux/Solaris Systems Administrator
</a>


From monica.leko at gmail.com  Sun May 18 07:13:01 2008
From: monica.leko at gmail.com (Monica Leko)
Date: Sun, 18 May 2008 04:13:01 -0700 (PDT)
Subject: Write bits in file
Message-ID: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>

Hi

I have a specific format and I need binary representation.  Does
Python have some built-in function which will, for instance, represent
number 15 in exactly 10 bits?


From inhahe at gmail.com  Thu May 22 12:13:16 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:13:16 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>
	<a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>
	<111a4113-d453-4c2c-9997-0c27d8fcea8b@a32g2000prf.googlegroups.com>
Message-ID: <HXgZj.61417$3v1.4621@bignews3.bellsouth.net>

>Ma: Symbolic identity is a mathematical relation
>Mb: Symbols are acausal
>m: Matter is causal
>C: Symbolic identity is not defined on matter.

What is defined on matter then?  You're saying all symbolism is not defined 
on matter.  Much of our thinking about the world itself is symbolic.  How do 
we 'define on matter' without thinking about it?  Definition is another 
symbolic thinking thing we do.  What does it mean to 'define on matter'?  If 
you were to paint symbol/matter like the mind/body problem interpreted on 
dualism (not to beg the question, but just to say if you're saying they're 
different substances) then some people would ask, how does one thing 
interact with the other?  You could say that symbols don't exist and 
inferring symbols is just a way of thinking of the world, but since we think 
in symbols, thinking becomes something that doesn't exist and is inferred 
from a way of thinking about the world, which doesn't exist and is inferred 
from a way of thinking about the world, etc.  I don't think you can say that 
thought-symbolism is a different question from mathematical symbolism 
because Aristotle inferred "a is a" directly from the way we think about the 
world.  cf:
>>>a is a
True

Perhaps symbols and symbolic identity are defined as algorithms which happen 
in the real world to come to a conclusion.  It raises the question of how 
causal an algorithm is.  But if you call an algorithm 'a way of doing 
something' then it's much more down-to-Earth.   But it raises the question 
of how we define the boundaries of whether doing something is 'doing that 
thing' (since an algorithm is strictly formal and mathematically 
deterministic), given that you never step in the same river twice, since you 
then have to define the boundaries of determining whether doing something 
falls within the boundaries or not, ad infinitum.

I don't have a conclusion.  Suffice it to say it obviously works out 
somehow.  I'm just wondering about what 'defined on matter' means.








From dmkim at mktec.co.kr  Sun May 25 22:30:44 2008
From: dmkim at mktec.co.kr (bbmerong)
Date: Sun, 25 May 2008 19:30:44 -0700 (PDT)
Subject: PYQT- How to prevent a dialog being resized in qtdesigner
Message-ID: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>

I have a question about qtdesigner.

I'd like to know how to prevent a dialog being resized in qtdesigner.

I'll wait for your answer.

Then, Thank you in advance.


From andrej.panjkov at climatechange.qld.gov.au  Tue May  6 19:25:20 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Tue, 6 May 2008 16:25:20 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org> 
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com> 
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
Message-ID: <1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>

On May 6, 9:06 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com> writes:
> > 2008/5/6, Banibrata Dutta <banibrata.du... at gmail.com>:
> > >  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>
> > >  So why not put symlink to Python over there on all machines, if
> > >  we can put one (or env itself) there ?
>
> > To avoid linking all the rest of interpreters like perl, ruby, lua
> > and dozens of others.
>
> The argument was being made from "thousands of scripts". Isn't "dozens
> of symlinks" better?
>

It depends on single user vs multi user.  We keep multiple versions of
packages because some software requires the older versions.  Which
version do we symlink to?  What if we simultaneously require access to
two different versions?  For example, to keep legacy software going,
or to test updated versions while keeping operational versions
running.
What if we have shared file systems, and we have multiplatform
versions?  Python for solaris, python for tru64?

In a sense, we do have dozens of "virtual" links, using the modules
package to adjust paths on the fly.  This is more flexible than having
a static symlink in /usr/bin.  It allows us to select on a per user,
per process, per script basis, the python we want, version, platform
etc.  With a static symlink, every user/process/job gets the same
python, unless you want to flip symlinks around.

Also, every 10 years or so, each platform gets replaced, so we are
replacing platforms here every few years.  And we don't always get the
same replacement system.  Sure we can go in and  touch up all the
scripts.  But it just seems so much easier and flexible to tell a
python/bash/other script to use what you get from the path, and set
the paths.

Of course, things are different on a single user desktop system, with
its own filesystems.  If you are sure where python is, and you only
have one python, and you don't mind revisiting your scripts and
editing them if things change, by all means hard code the python path
in.

A


From basti.wiesner at gmx.net  Fri May 30 10:42:00 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Fri, 30 May 2008 16:42:00 +0200
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
Message-ID: <g1p3np$pvf$01$1@news.t-online.com>

[ Kris Kennaway <kris at FreeBSD.org> ]

> I want to make use of UNIX credential passing on a local domain socket
> to verify the identity of a user connecting to a privileged service.
> However it looks like the socket module doesn't implement
> sendmsg/recvmsg wrappers, and I can't find another module that does this
> either.  Is there something I have missed?

http://pyside.blogspot.com/2007/07/unix-socket-credentials-with-python.html

Illustrates, how to use socket credentials without sendmsg/recvmsg and so
without any need for patching.


-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From vivainio at gmail.com  Wed May 14 05:59:44 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 14 May 2008 09:59:44 GMT
Subject: portable way to tell what Popen will call
References: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>
Message-ID: <873aoltdda.fsf@gmail.com>

Brendan Miller <catphive at catphive.net> writes:

> For instance on unix systems, Popen will work for files flagged with
> the executable bit, whereas on windows Popen will work on files
> ending the in .exe extension (and I don't think anything else). Is
> there a portable way

Actually, if you pass the use_shell = 1 argument to Popen, it will
launch the process using a shell - that is, what you expect to work in
a shell (and consequently os.system()) will work.

> to check what Popen will work on without actually execute it? Do I
> have to write a bunch of platform specific code here?

Unfortunately, you'll probably need to write platform specific kludges
for this.


From george.sakkis at gmail.com  Thu May 15 08:02:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 15 May 2008 05:02:46 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
	<g0gndb$3vt$03$1@news.t-online.com>
Message-ID: <07e21cac-a82d-44eb-a033-d606b251d0fd@c58g2000hsc.googlegroups.com>

On May 15, 3:06 am, Peter Otten <__pete... at web.de> wrote:

> George Sakkis wrote:
> > I spent several hours debugging some bogus data results that turned
> > out to be caused by the fact that heapq.nlargest doesn't respect rich
> > comparisons:
>
> >     import heapq
> >     import random
>
> >     class X(object):
> >         def __init__(self, x): self.x=x
> >         def __repr__(self): return 'X(%s)' % self.x
> >         if True:
> >             # this succeeds
> >             def __cmp__(self, other): return cmp(self.x , other.x)
> >         else:
> >             # this fails
> >             def __lt__(self, other): return self.x < other.x
>
> >     s = [X(i) for i in range(10)]
> >     random.shuffle(s)
>
> >     s1 = heapq.nlargest(5, s)
> >     s2 = sorted(s, reverse=True)[:5]
> >     assert s1 == s2, (s,s1,s2)
>
> >     s1 = heapq.nsmallest(5, s)
> >     s2 = sorted(s)[:5]
> >     assert s1 == s2, (s,s1,s2)
>
> > According to the docs, nlargest is equivalent to: "sorted(iterable,
> > key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> > be at least a documentation bug, if not an implementation one.
>
> Implementing a subset of the rich comparisons is always dangerous. According
> to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
> work:
>
> import heapq
> import random
>
> used_rich = set()
>
> class X(object):
>     def __init__(self, x): self.x=x
>     def __repr__(self): return 'X(%s)' % self.x
>     def __lt__(self, other):
>         used_rich.add("lt")
>         return self.x < other.x
>     def __eq__(self, other):
>         used_rich.add("eq")
>         return self.x == other.x
>     def __gt__(self, other):
>         used_rich.add("gt")
>         return self.x > other.x
>     def __ge__(self, other):
>         used_rich.add("ge")
>         return self.x >= other.x
>     def __ne__(self, other):
>         used_rich.add("ne")
>         return self.x != other.x
>     def __le__(self, other):
>         used_rich.add("le")
>         return self.x <= other.x
>
> s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]
>
> smallest = sorted(s)[:5]
> largest = sorted(s, reverse=True)[:5]
>
> print "used by sorted:", used_rich
> used_rich = set()
>
> for i in range(10000):
>
>     s1 = heapq.nlargest(5, s)
>     assert s1 == largest, (s, s1, largest)
>
>     s1 = heapq.nsmallest(5, s)
>     assert s1 == smallest, (s, s1, smallest)
>
>     random.shuffle(s)
>
> print "used by nlargest/nsmallest:", used_rich
>
> Output:
> used by sorted: set(['lt'])
> used by nlargest/nsmallest: set(['lt', 'le', 'eq'])

Interesting, I don't get 'eq' on one box ("2.5 (r25:51908, Sep 19
2006, 09:52:17) [MSC v.1310 32 bit (Intel)]") but I get it on another
("2.5.1 (r251:54863, May  9 2007, 15:27:54) [GCC 3.3.5 (Debian
1:3.3.5-13)]").

A more interesting question is how many (and which) of the rich
comparisons can you omit while maintaining correctness (see script
below). The results on my v2.5 on Windows are:

1. Use ('lt', 'le') if both present
2. If only 'lt' is missing use ('le', 'gt')
3. If only 'le' is missing use ('lt', 'ge')
4. If both ('lt', 'le') are missing use  ('gt', 'ge')
5. If 3 or more of ('lt', 'le', 'gt', 'ge') are missing use the
remaining one (if any) plus 'cmp'
6. If (5) holds and there is no 'cmp', nlargest/nsmaller are WRONG

The results on the v2.5.1 debian box are the same, with the addition
of 'eq' in all steps; if 'eq' is not present, 'cmp' is called, and if
neither 'cmp' is present, the results are still correct (provided any
of the cases 1-4 above hold of course). IOW, it does some extra
equality checks if it can, but these are optional since it can be
correct without them.

For sorted(), the results are identical on both boxes:
  - Use only 'lt' if present else
  - Use only 'gt' if present else
  - Use only 'cmp' if present else
  - WRONG RESULTS
IOW, no attempt to use 'le','ge','eq','ne' is made.

I wonder how stable is this behavior across different versions and
implementations (Jython, IronPython, etc).

George


==== testing script ==================================

import heapq
from random import shuffle

used = set(); add = used.add

class X(object):
    def __init__(self, x): self.x=x
    def __repr__(self): return 'X(%s)' % self.x

    # try to remove one or more of these included in a used set
    # and see what happens
    def __gt__(self, other): add('gt'); return self.x > other.x
    def __ge__(self, other): add('ge'); return self.x >= other.x
    def __lt__(self, other): add('lt'); return self.x < other.x
    def __le__(self, other): add('le'); return self.x <= other.x
    def __eq__(self, other): add('eq'); return self.x == other.x
    def __ne__(self, other): add('ne'); return self.x != other.x
    def __cmp__(self, other): add('cmp'); return cmp(self.x, other.x)


if __name__ == '__main__':
    check_heapq = True
    n = 1000
    s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]
    used.clear()
    if check_heapq:
        for i in xrange(n):
            s2 = heapq.nlargest(5, s)
            assert [a.x for a in s2] == range(9,4,-1), s2
            shuffle(s)
    else:
        for i in xrange(n):
            s2 = sorted(s, reverse=True)[:5]
            assert [a.x for a in s2] == range(9,4,-1), s2
            shuffle(s)
    used_largest = used.copy()
    print "largest:", used_largest

    used.clear()
    if check_heapq:
        for i in xrange(n):
            s2 = heapq.nsmallest(5, s)
            assert [a.x for a in s2] == range(5), s2
            shuffle(s)
    else:
        for i in xrange(n):
            s2 = sorted(s)[:5]
            assert [a.x for a in s2] == range(5), s2
            shuffle(s)
    used_smallest = used.copy()
    print "smallest:", used_smallest
    assert used_largest == used_smallest


From gagsl-py2 at yahoo.com.ar  Sun May 18 01:17:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 02:17:56 -0300
Subject: r' question
References: <20080518023835.61FE61E4009@bag.python.org>
Message-ID: <op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 17 May 2008 23:37:16 -0300, Dick Moores <rdm at rcblue.com> escribi?:

> I have a text file of phone numbers, which I'd like to search with a regex.
>
> fstr = "\sjoe\s"
> regex = "^.*" + fstr + ".*$"
>
> fstr = "\sjoe\s"
> regex = "r'^.*" + fstr + ".*$'"

The r"..." is a signal to the parser - meaning "don't interpret the escape characters here". Note that the r is OUTSIDE the quotes. In your example, the escape characters are in fstr, so it should be written as r"\sjoe\s"

Now, if you want "the lines that contain the word joe surrounded by space", just use:

import re
regex = r"\sjoe\s"
p = re.compile(regex, re.I)
f = open('phone.txt', 'r')
for line in f:
     m = p.search(line)
     if m:
         print m.group()
f.close()

A file is its own line iterator (no need for readlines). And since you're iterating over lines, the regex doesn't have to test for it ^ and $.

-- 
Gabriel Genellina



From goldnery at gmail.com  Mon May 26 18:18:00 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 15:18:00 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
Message-ID: <cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>

On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > Thanks!
> > Anyone know which library should i learn then?
>
> Looks like you need to dive into Win32 APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
> and others
> combined with ctypes.
>
> Ivan

well, that seems extremely valuable but how can i implement those
functions with python?


From loriw at novoengineering.com  Thu May  1 17:28:24 2008
From: loriw at novoengineering.com (Lori Welte)
Date: Thu, 1 May 2008 14:28:24 -0700
Subject: Is anyone using Python for embedded applications?
Message-ID: <EBBD6E66CC2C41489FC4C89E63F5A20F4A0A00@EXCHANGE.novo.local>

Hi Dean

 

I need a minimalist version of Python to run on a ColdFire-based
embedded system (written in C with no RTOS). It will be used by
mechanical engineers to test their servo and stepper motors. I need all
the basic features you are providing in PyMite.

 

I've managed to port PyMite and run a test "trivial" on my embedded
platform, but I am a bit confused about whether this is really what I
need.

 

I need an interactive Python interpreter running on my embedded...I will
be feeding it lines through my USB connection. It seems that PyMite is
not exactly what I'm looking for (?). I expected to be able to do
something like pm_run("abs(-1)") for example, but that doesn't work.
After reading carefully your docs, it seems like in fact that PyMite
should be used by writing Python programs on a PC, running your
PyImageCreator, then rebuilding the embedded with the native C code, and
downloading the image file to the embedded? Although this is pretty
nifty, this won't work for my needs.

 

Could you confirm that PyMite does not run like pm_run() =
PyRun_SimpleString() or if it does, what am I missing?

 

Thanks so much for all your excellent software

Lori Welte

"firmwaregirl"

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From Skonieczny.C at emssatcom.com  Fri May 30 05:16:45 2008
From: Skonieczny.C at emssatcom.com (Skonieczny, Chris)
Date: Fri, 30 May 2008 18:46:45 +0930
Subject: How to covert ASCII to integer in Python?
Message-ID: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com>

YOU SHOULD REMOVE or CORRECT YOUR POST here: 
http://mail.python.org/pipermail/python-list/2007-February/427841.html  
 
It is not true - eg. try : 
a='P'            # P is ASCII , isn't it ? 
b=int(a)
and what you will get ? An error !!!
 
Or probably you yourself should - quote : 
"You probably should go through the tutorial ASAP that is located here:

http://docs.python.org/tut/ "

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From stanc at al.com.au  Tue May 13 19:46:51 2008
From: stanc at al.com.au (Astan Chee)
Date: Wed, 14 May 2008 09:46:51 +1000
Subject: threads problem in python
In-Reply-To: <bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
References: <48296275.9090602@al.com.au>	<mailman.1039.1210675135.12834.python-list@python.org>
	<bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
Message-ID: <482A286B.3090504@al.com.au>

Sorry, I mean functions not classes. Well, actually, one is a class and 
another is a function. So when the script (its a free game btw) runs, it 
instantiates the first class and somewhere in the middle of processing 
the first class, I need to call a function as a separate thread, I also 
want to wait for the function to complete and I was wondering how python 
handles the thread of this function? Does it die when the function 
completes? Anyway, I know it sounds silly to have 2 threads when I can 
do it with one, but Im using wx to render opengl objects using pygame. 
So it has to be a separate thread, otherwise wx wont play nice. Is there 
a simple example of how I can do this?
And as for finance, the source for the game is free, but it isnt free to 
play on my server. How does that sound?
Thanks
Astan

castironpi at gmail.com wrote:
> On May 13, 5:38 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>   
>> En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <st... at al.com.au> escribi?:
>> I'm confused trying to understand your requirements too. "run a class?"
>> Threads execute code, it's easier to think of them as *functions* that are  
>> executed at the same time (or almost).
>> So you have a function A that runs first, and creates a second thread that  
>> will execute function B. Then A will wait for B to finish. What do you  
>> want to do in A while it's waiting? Nothing? Then why to use a second  
>> thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt  
>> and others have specific ways to execute backgroung tasks while keeping  
>> the user interface responsive - you should tell us which one you're using  
>> in that case.
>>
>> --
>> Gabriel Genellina
>>     
>
> I don't mean to be impertinent, but are you making any cents with the
> assignment?  Both free-ers and workers come in here.  I am a free-er
> who has reason to doubt that money-driven programs get stuck at that
> kind of ambiguity.  I hold that money keeps you out of that mess.
>
> However, there are a number of things we can do to help, but as I, per
> se, am only one person, I may not give you the best advice to start
> with.  How do you find the 'threading.py' docs?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."



Animal Logic
http://www.animallogic.com

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From kyosohma at gmail.com  Wed May 21 09:24:48 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 21 May 2008 06:24:48 -0700 (PDT)
Subject: Print HTML from Python
References: <mailman.1413.1211359541.12834.python-list@python.org>
Message-ID: <289f28c7-ce86-4ea4-bfe8-10eac754e153@26g2000hsk.googlegroups.com>

On May 21, 3:45?am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi All,
>
> I am at a loss. This is slightly OT because it concerns Windows and
> HTML printing. I would like to print a HTML document from Python, but
> not showing the printing dialog. After numerous searches and trials I
> came to the conclusion that ShellExecute with the "print" command and
> a HTML document simply always shows a print dialog, so that road is a
> dead end (or unless someone can show me a snippet that does work).
>
> I used win32com and I am able to print through he internet explorer
> interface which seems to work, but quite unreliably. When I execute
> the scipt too fast, nothing is printed at all. The method isBusy that
> IE exposes through COM always returns False so there is no way to wait
> reliably on the progress of the printer.
>
> So basically my question is, does someone know a python lib or way to
> print HTML to the default printer (I can get the printer name so even
> that is not really needed) without showing the print dialog?
>
> With regards,
> - Jorgen


Did you try all the methods on Tim Golden's site?

http://timgolden.me.uk/python/win32_how_do_i/print.html

I use the one at the bottom for PDFs. I never see a print dialog, but
it does leave Adobe running. If you're printing from Internet
Explorer, you might look at the PAMIE project.

http://pamie.sourceforge.net/

HTH

Mike


From levlozhkin at gmail.com  Sun May  4 16:01:15 2008
From: levlozhkin at gmail.com (lev)
Date: Sun, 4 May 2008 13:01:15 -0700 (PDT)
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
Message-ID: <15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>

> * Remove newlines introduced by email
> * Move imports to start of file
    used imports of the edited script you sent.
> * Change indentation from 8 spaces to 4
    I like using tabs because of the text editor I use, the script at
the end is with 4 though.
> * Move main() to bottom of script
> * Remove useless "pass" and "return" lines
    I replaced the return nothing lines with passes, but I like
keeping them in case the indentation is ever lost - makes it easy to
go back to original indentation
> * Temporarily change broken "chdir" line
    removed as many instances of chdir as possible (a few useless ones
to accomodate the functions - changed functions to not chdir as much),
that line seems to work... I made it in case the script is launched
with say: 'python somedir\someotherdir\script.py' rather than 'python
script.py', because I need it to work in it's own and parent
directory.
> * Split lines so they fit into 80 chars
> * Add spaces after commas
> * Use path.join instead of string interpolation
    in all cases when possible - done
> * rename rename() to rename_md5() because rename() shadows a function
> imported from os.
    renamed all functions to more understandable names (without
collisions)
> * Rename vars shadowing imported names
    renamed almost all vars to more understandable names
> * Improve logic for checking when to print help
    the example you gave me does pretty much the exact same thing as
before... (the options are either false or true depending on if the
argument was used, if false for both then no logic was done and help
is shown, which would be exactly the same if the did_something var
remained false.
> * Create emtpy md5 listing file if one doesn't exist
    I intended it to be a script to help ripping a specific mp3cd to
disk, not necessarily create checksum files, because i intend to
include the checksums file.
> * Add a comment for a dodgy-looking section
    The 4 folders to be renamed are intentional (this is for a
specific mp3cd with 4 album folders)

I added comments to explain what I was doing with the dictionary[x][1]
[1][0], and also what the indexes for the strings are used for ([3:]
to remove the 001 in 001Track.mp3, etc.)


Thanks for the advice so far,
lev

#!/usr/bin/env python

import md5
from glob import glob
from optparse import OptionParser
from os import chdir, path, rename, remove
from sys import argv, exit

def verify_checksum_set(checksums):
    checksums = open(checksums, 'r')
    changed_files = {}
    missing_files = []
    for fline in checksums.readlines():
        line = fline.split(' *')
        original_sum = line[0].upper()
        try:
            new_sum = calculate_checksum(line[1].strip())
            if  new_sum == original_sum:
                print '.',
                pass
            else:
                changed_files[line[1]] = (original_sum, new_sum)
                pass
        except IOError:
            missing_files.append(line[1])
            pass
        pass
    checksums.close()
    changed_files_keys = changed_files.keys()
    changed_files_keys.sort()
    missing_files.sort()
    print '\n'
    if len(changed_files) != 0:
        print 'File(s) changed:'
        for key in changed_files_keys:
            print key.strip('\n'), 'changed from:\n\t',
changed_files[key][0], \
                'to\n\t', changed_files[key][1]
            pass
        print '\n\t', len(changed_files), 'file(s) changed.\n'
        pass
    if len(missing_files) != 0:
        print 'File(s) not found:'
        for x in range(len(missing_files)):
            print '\t', missing_files[x]
            pass
        print '\n\t', len(missing_files), 'file(s) not found.\n'
        pass
    if not len(changed_files) and not len(missing_files):
        print "\n\tChecksums Verified\n"
        pass
    pass

def calculate_checksum(file_name):
    file_to_check = open(file_name, 'rb')
    chunk = 8196
    checksum = md5.new()
    while (True):
        chunkdata = file_to_check.read(chunk)
        if not chunkdata:
            break
        checksum.update(chunkdata)
        pass
    file_to_check.close()
    return checksum.hexdigest().upper()

def rename_file_set(new_dir_names, checksums):
    file_info = md5format(checksums)
    dirlist = glob('00[1-4]Volume [1-4]')
    dirlist.sort()
    for x in range(4):
        rename(dirlist[x], new_dir_names[x])
        print '\t', dirlist[x], 'renamed to:', new_dir_names[x]
        chdir(new_dir_names[x])
        for old_file_name in glob ('*.mp3'):
            # old_file_name[3:] is part of removing numbering:
'001Track ...'
            new_file_name = old_file_name[3:]
            rename(old_file_name, new_file_name)
            print '\t\t', old_file_name, 'renamed to:', new_file_name
            pass
        chdir('..')
        file_info = md5file_name_edit(file_info,dirlist[x],
            new_dir_names[x])
        pass
    md5write(file_info, checksums)
    replace_strings('The American Century.htm', dirlist,
new_dir_names)
    print '\n\tDirectories and Files renamed.'
    pass

def md5format(checksums):
    file_info = {}
    checksums = open(checksums, 'r')
    for line in checksums.readlines():
        splitline = line.split(' *')
        #original full filename = (checksum, [directory name, file
name])
        file_info[splitline[1]] = (splitline[0],splitline[1].split('\
\'))
        pass
    checksums.close()
    return file_info

def md5file_name_edit(file_info, old_dir_name, new_dir_name):
    for x in file_info.keys():
        dir_name_from_file = file_info[x][1][0]
        if dir_name_from_file == old_dir_name:
            checksum = file_info[x][0]
            file_name_from_file = file_info[x][1][1]
            #md5 format: 'C8109BF6B0EF724770A66CF4ED6251A7 *001Album
1\001Track.mp3'
            file_info[x] = (checksum, [new_dir_name,
file_name_from_file])
            #mp3cd numbering: '001Track.mp3, 002Track.mp3...'
            if file_name_from_file[0] == '0':
                file_info[x] =(checksum, [new_dir_name,
                    file_name_from_file[3:]])
                pass
            pass
        pass
    return file_info

def md5write(file_info, checksums):
    keys = file_info.keys()
    keys.sort()
    checksums = open(checksums, 'w')
    for x in keys:
        checksum = file_info[x][0]
        try:
            #when the file is one directory deep:
            #'C8109BF6B0EF724770A66CF4ED6251A7 *001Album
1\001Track.mp3'
            dir_name = file_info[x][1][0]
            file_name = file_info[x][1][1]
            checksums.writelines('%s *%s' % (checksum,
os.path.join(dir_name, \
                file_name)))
            pass
        except IndexError:
            #when the file is in root dir:
'007CC9C12342017709A2F19AF75247BD *010Track.mp3'
            file_name = file_info[x][1][0]
            checksums.writelines('%s *%s' % (checksum, file_name))
            pass
        pass
    checksums.close()
    pass

def replace_strings(file_name, oldlist, newlist):
    try:
        new_file = open(file_name, 'r').read();
        for x in range(4):
            new_file = new_file.replace(oldlist[x], newlist[x], 1)
            pass
        remove(file_name)
        file_name = open(file_name, 'w', len(new_file))
        file_name.write(new_file)
        file_name.close()
        pass
    except IOError:
        print file_name, 'not found'
        pass
    pass

def main():
    full_path = path.abspath(path.dirname(argv[0]))
    chdir(full_path)
    chdir('..')
    checksums = path.join(full_path, 'checksums.md5')
    new_dir_names = ('Volume 1 - 1889-1929', 'Volume 2 - 1929-1945', \
        'Volume 3 - 1945-1965', 'Volume 4 - 1963-1989')
    parser = OptionParser()
    parser.add_option ('-v', '--verify', action = 'store_true', \
        dest = 'verify', help = 'verify checksums')
    parser.add_option ('-r', '--rename', action = 'store_true', dest =
\
        'rename', help = \
        'rename files to a more usable form (write rights needed)')
    (options, args) = parser.parse_args()
    if options.verify:
        verify_checksum_set(checksums)
        pass
    if options.rename:
        rename_file_set(new_dir_names, checksums)
        pass
    if not options.verify and not options.rename:
        parser.print_help()
        pass
    pass

if __name__ == '__main__':
    main()


From see.signature at no.spam  Fri May 23 10:13:29 2008
From: see.signature at no.spam (Eric Brunel)
Date: Fri, 23 May 2008 16:13:29 +0200
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<7xk5hll2hz.fsf@ruckus.brouhaha.com>
Message-ID: <op.ubl1sra7wepdt4@ericb.pragmadev>

On Fri, 23 May 2008 12:48:56 +0200, <//phr.cx at NOSPAM.invalid>> wrote:

> "inhahe" <inhahe at gmail.com> writes:
>> planets are spherical (all implementations of Python are not natively
>> compiled (and you said for whatever definition)), and b) It's a far cry  
>> to
>> imagine a planet coming into being that's not spherical (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
> There are native Python compilers, see psyco and pypy.

... and C/C++ interpreters; see:
http://root.cern.ch/twiki/bin/view/ROOT/CINT
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From kamhung.soh at gmail.com  Tue May  6 19:09:08 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 07 May 2008 09:09:08 +1000
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <op.uaq89iawev04yd@melwxp23>

On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson  
<mcrobertson at hotmail.com> wrote:

> I'm having trouble opening a file in linux, whose path has spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
>  >>> open('./my test/test.txt')
> Exception
>  >>> open('./my\\ test/test.txt')
> Exception
>

Try a string literal by prefixing your path string with "r":

open(r'./my test/test.txt')

See http://docs.python.org/ref/strings.html

> but yet...
>
>  >>> import os
>  >>> os.chdir('./my test')
>  >>> open('./test')
>
> works just fine.

Couldn't test on Linux, but in Windows ...

>>> os.chdir('C:\temp\my test')
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
WindowsError: [Error 123] The filename, directory name, or volume label  
syntax is incorrect: 'C:\temp\\my test'

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From lists at cheimes.de  Thu May 15 17:56:23 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 15 May 2008 23:56:23 +0200
Subject: Pass data from Python to C++
In-Reply-To: <g0hrq3$rfb$1@solaris.cc.vt.edu>
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <g0ibi7$l1n$1@ger.gmane.org>

brad schrieb:
> However, other components can be written in a more user friendly, more
> easily maintained language. We've chosen Python for this. The main
> question now is how to pass the computationally heavy info to c++ from
> within Pyhton. os.system is not ideal. Just wondering how other folks do
> this? I have source to some of the c++ code, but some of it is in binary
> from only. It can take stdin or arguments.


You can either embed the C++ system as a shared library in Python or you
can embed the Python interpreter in your C++ app. Either way you should
use Python's buffer interface to access the data of your library. The
buffer interfaces allows you to create a read only or read/write view on
your data without copying the data.

Christian



From Afro.Systems at gmail.com  Sat May  3 13:20:48 2008
From: Afro.Systems at gmail.com (Tzury Bar Yochay)
Date: Sat, 3 May 2008 10:20:48 -0700 (PDT)
Subject: Phyton module for Windows Event Viewer?
References: <0a2fdb47-cc66-4ba9-aa64-4b034b84a8a7@k13g2000hse.googlegroups.com>
Message-ID: <29a2532c-3b1a-4d89-b48f-bc3a48e343e4@e39g2000hsf.googlegroups.com>


> Can someone point me in the right direction? I'm looking for a module
> to monitor the Windows Event Viewer.

http://docs.python.org/lib/module-logging.html

NTEventLogHandler is the one you should use.

happy pythoning


From erik.oosterwaal at gmail.com  Mon May 26 17:24:19 2008
From: erik.oosterwaal at gmail.com (erik.oosterwaal at gmail.com)
Date: Mon, 26 May 2008 14:24:19 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>

> There are a couple points I don't get here. Mostly: how is your
> application logic separated from the presentation logic if you "intermix
> code directly into the HTML" ? Or are you pages including the libs,
> getting the appropriate data out of the DB, and then including another
> file acting as a template ? If so, then how are you're "pages" different
> from MVC frameworks controllers ?

I have the WSC files as "libraries" I can open in a standard ASP page,
So for example, to get a recordset in one of my ASP pages, I would use
something like

	Dim objUsers, Recordset_of_users
	Set objUsers= GetObject("script:" & Server.MapPath("/~components/
users.wsc"))
		objUsers.open()
		Set Recordset_of_users =
objUsers.getUsersByGroup(request.queryString("group_id"))
		objUsers.close()
	Set objUsers= Nothing

I put code like this at the top of my ASP pages, and inside the HTML
code I can use "Recordset_of_users" and loop through it (for example).
All code in the asp pages is getting and setting information, or
looping through it. All real (business) logic is inside the WSC files.

The only real difference is that I don't use the "C" of MVC. I dislike
a controller that calls and routes functionality based on the URL. The
M (model) functionality is covered by the WSC files. The V (view) are
the asp pages themselves. The controller part is handled by the asp
pages aswell, just using regular links, GETs and POSTs in forms.

> But, IMHO, writing PHP-style Python webapp is silly.

:) Maybe I need to pick up a new style of programming as well, on top
of just a new language...

> Better shoot yourself in the foot with a PHP-like Python-thing, than
> committing suicide by shooting yourself into the head with PHP ...

LOL, point taken.

So to summarize: it should be possible to get exactly what I want, but
it's not advisable, because the frameworks aren't designed to work
like this. That makes sense.
I want to thank you guys for all the advice, I have a lot of
frameworks and template-engines to look into now, I'll have a look at
all that you mentioned to see which one suits me best. Judging from
the quick and thorough support from the Python community, I think I
will stick with a proven framework and/or style, so I can ask a
question once in a while.
There is probably less sense in trying to pick up a new language while
at the same time trying to stick to the methods I used in an old
language. But hey, I thought, maybe a thing like this already exists
exactly like I want it... Ah well.

Thanks again all, take care!

Erik





From aaron.watters at gmail.com  Tue May  6 11:03:13 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Tue, 6 May 2008 08:03:13 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com> 
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>
Message-ID: <6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>

I'm having trouble following your discussion
and I suspect you might be a friend of Mark V Cheney.
But I will focus on this one point.

On May 5, 11:14 pm, castiro... at gmail.com wrote:
> If recursive generators are really useless (erect wall might not be),

I would like to have recursive generators --
for example to be able to traverse a tree
and yield the value at every node.  Right now
to do this you need to build a chain of generators
from each leaf to the root of the tree (or avoid
recursion by managing your own stack of nodes).
Every yield must "bubble up the tree".

With stackless Python you create the equivalent
of a "recursive generator" by using channels
-- and you can do a lot of other cool stuff with
channels too.  The "yield" (which doesn't even
require a special keyword ;) ) goes directly to
the other endpoint of the channel, with no bubbling.
It's too bad the Python that comes
installed on Macs doesn't support channels :(.

I know I didn't address your question or comments...
  -- Aaron Watters

====
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=ifdef+stackless


From gnewsg at gmail.com  Fri May  2 14:43:18 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 11:43:18 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
Message-ID: <a20c4a0f-5c58-400d-9ee6-6adcbe458433@k13g2000hse.googlegroups.com>

On 29 Apr, 15:56, TkNeo <tarun.... at gmail.com> wrote:
> I need to do SSL file transfer using python? Is there a library i can
> use ?
>
> Thanks.

If you have patience you can wait for Python 2.6 which will include a
new ssl module, otherwise there are a lot of third party libraries out
there which already binds OpenSSL for Python.


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From arnodel at googlemail.com  Wed May 28 13:50:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 18:50:01 +0100
Subject: Struct usages in Python
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
Message-ID: <m2fxs248ty.fsf@googlemail.com>

"Alex Gusarov" <alex.m.gusarov at gmail.com> writes:

>>  class Event(object):
>>
>> Always subclass object, unless you have a very compelling reason not to,
>> or you are subclassing something else.
>>
>
> I've thought that if I write
>
> class Event:
>     pass
>
> , it'll be subclass of object too, I was wrong?

You are wrong for Python 2.X, but right for Python 3 where old-style
classes are gone for good.

What you define with the statement

    class Event: pass

is an 'old-style' class.  Witness:

    >>> class Event: pass
    ... 
    >>> class NewEvent(object): pass
    ... 
    >>> type(Event)
    <type 'classobj'>
    >>> type(NewEvent)
    <type 'type'>
    >>> type(Event())
    <type 'instance'>
    del>>> type(NewEvent())
    <class '__main__.NewEvent'>

All old-style classes are actually objects of type 'classobj' (they
all have the same type!), all their instances are all of type 'instance'.

    >>> type(FooBar) == type(Event)
    True
    >>> type(FooBar()) == type(Event())
    True

Whereas instances of new-style classes are of type their class:

    >>> class NewFooBar(object): pass
    ... 
    >>> type(NewFooBar) == type(NewEvent)
    True
    >>> type(NewFooBar()) == type(NewEvent())
    False

However, in python 2.X (X > 2?), you can force all classes to of a
certain type by setting the global variable '__metaclass__'. So:

    >>> type(Event) # Event is an old-style class
    <type 'classobj'>
    >>> __metaclass__ = type
    >>> class Event: pass
    ... 
    >>> type(Event) # Now Event is new-style!
    <type 'type'>

HTH

-- 
Arnaud


From justjpm at aol.com  Thu May 29 10:33:07 2008
From: justjpm at aol.com (Jim)
Date: Thu, 29 May 2008 07:33:07 -0700 (PDT)
Subject: BadStatusLine error
References: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>
	<6a5bqpF165l66U1@mid.uni-berlin.de>
Message-ID: <4a1139bd-d76a-44bf-8972-fedb9c833977@i76g2000hsf.googlegroups.com>

On May 28, 11:24 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jim wrote:
> > Hi
>
> > I get a BadStatusLine error (indicated below). Can anyone help with
> > how to
> > catch error in code before abort?
>
> http://docs.python.org/tut/node10.html
>
> Diez

Thanks Diez docs help. Jim



From ivan.illarionov at gmail.com  Sun May 25 21:27:12 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 01:27:12 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
Message-ID: <g1d3lf$1rpd$3@news.mtu.ru>

On Sun, 25 May 2008 20:53:28 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> Jerry Stuckle wrote:
>> 
>>> As I've said before - good programmers can write good code in any
>>> language.
>> 
>> Yes, they can. But it may be harder to do for them in one language and
>> easier in another.
>> 
>> Ivan
> 
> Not for a good programmer it isn't.  I've known a few good programmers
> in my 40+ years of programming.  I've known a lot more poor programmers
> who think they're good.

I can't argue with your experience. I don't think that I'm good 
programmer. I want to be better. And I hope that when I'll have 48+ years 
experience I won't have to use it as argumentum ad hominem.


From d.a.abernathy at gmail.com  Wed May 14 16:09:32 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 14 May 2008 13:09:32 -0700 (PDT)
Subject: Using file objects with elementtree
Message-ID: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>

Hello,

Rather then holding my XML document in memory before writing it to
disk, I want to create a file object that elementtree will write each
element to has it is created. Does any one know how to do that ?

Here is my code so, far:

fd = open("page.xml", "w")
tree.write( fd, encoding="iso-8859-1")

I know there's something I am doing wrong, but I just do not know
what.


From ian.g.kelly at gmail.com  Wed May  7 05:17:35 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 7 May 2008 03:17:35 -0600
Subject: Why don't generators execute until first yield?
In-Reply-To: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <3fc761710805070217w4367e659h362257a879e14382@mail.gmail.com>

On Wed, May 7, 2008 at 2:29 AM, Martin Sand Christensen <msc at es.aau.dk> wrote:
>  Now to the main point. When a generator function is run, it immediately
>  returns a generator, and it does not run any code inside the generator.
>  Not until generator.next() is called is any code inside the generator
>  executed, giving it traditional lazy evaluation semantics. Why don't
>  generators follow the usual eager evaluation semantics of Python and
>  immediately execute up until right before the first yield instead?
>  Giving generators special case semantics for no good reason is a really
>  bad idea, so I'm very curious if there is a good reason for it being
>  this way. With the current semantics it means that errors can pop up at
>  unexpected times rather than the code failing fast.

Isn't lazy evaluation sort of the whole point of replacing a list with
an iterator?  Besides which, running up to the first yield when
instantiated would make the generator's first iteration inconsistent
with the remaining iterations.  Consider this somewhat contrived
example:

def printing_iter(stuff):
    for item in stuff:
        print item
        yield item

Clearly, the idea here is to create a generator that wraps another
iterator and prints each item as it yields it.  But using your
suggestion, this would instead print the first item at the time the
generator is created, rather than when the first item is actually
iterated over.

If you really want a generator that behaves the way you describe, I
suggest doing something like this:

def myGenerator(args):
    immediate_setup_code()

    def generator():
        for item in actual_generator_loop():
            yield item
    return generator()


From hasna1980_14 at hotmail.com  Fri May 30 08:59:13 2008
From: hasna1980_14 at hotmail.com (ha bo)
Date: Fri, 30 May 2008 12:59:13 +0000
Subject: help
Message-ID: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>

hi 
i wanna paginate my table (x lines per pages),the size of my table is changing according to the user.
i wanna know if paginator.py can help me ,if yes how?
some one can help me 
ps:i use django
thank you 

_________________________________________________________________
D?couvrez Windows Live Spaces et cr?ez votre site Web perso en quelques clics !
http://spaces.live.com/signup.aspx
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From afriere at yahoo.co.uk  Sun May 11 21:37:23 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Sun, 11 May 2008 18:37:23 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <77887b15-0bae-43b7-a2ac-d0f079d8c80c@p39g2000prm.googlegroups.com>

On May 11, 10:54 pm, wxPytho... at gmail.com wrote:
> To create a tuple with one element, you need to do this:
>
> >>> my_tuple = (1,)    # Note the trailing comma after the value 1
> >>> type(my_tuple)
>
> <type 'tuple'>
>

You needn't at all.  You could simply do this:

>>> your_tuple = 1,

You see, it's not the parentheses that make the tuple.


> But if you do this
>
> >>> my_tuple = (1)
> >>> type(my_tuple)
>
> <type 'int'>
>
> you don't get a tuple.

For which the BDFL should make us eternally grateful.

> it would be clean if Python would convert anything put into ( ) to
> be a tuple

You seriously want 2*(3+4) to return (7,7)?  You call that "clean"?!

At least type(my_tuple) would always return 'tuple,' whether it was or
not. ;)



From nayden at gmail.com  Fri May 23 17:07:19 2008
From: nayden at gmail.com (nayden)
Date: Fri, 23 May 2008 14:07:19 -0700 (PDT)
Subject: Storing objects in relational database
Message-ID: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>

I started playing with python a few weeks ago after a number of years
of perl programming and I can say that my first impression is,
unsurprisingly, quite positive. ;)
The reason I am writing here is that I can't seem to figure out how to
save/restore python objects into a relational database.  The way I
used to do it in perl was to 'freeze' the object before storing it
into the database and 'thaw' it before restoring it. (For those not
familiar with the perl terminology freeze and thaw are method from
perl's persistence module Storable).  I found that the python's
corresponding module is Pickle but it doesn't seem to work for me.. I
do roughly the following:
class TestA:


def insert():
    i = TestA('asdf')
    output = cStringIO.StringIO()
    cPickle.dump(i, output, 2)
    print "output.getvalue(): %s" % output.getvalue()
    jd = libpq.PgQuoteBytea(output.getvalue())
    print "jd %s" % jd
    return dbpool.runOperation("insert into jobs (effective_job_id,
job_description) values (1, " + jd + ")")


From darcy at druid.net  Sun May 11 23:23:52 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sun, 11 May 2008 23:23:52 -0400
Subject: anonymous assignment
In-Reply-To: <1XNVj.133805$Cj7.33096@pd7urf2no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <20080511232352.4f96d751.darcy@druid.net>

On Mon, 12 May 2008 02:28:13 GMT
Yves Dorfsman <yves at zioup.com> wrote:
> particular case, there's got to be a better way than:
> 
> d = time.local()
> y = d[0]
> d = d[1]

Like this?

    y, d = time.local()[:2]

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From python at bdurham.com  Tue May  6 10:07:19 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 10:07:19 -0400
Subject: Module to read input from commandline
In-Reply-To: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
References: <mailman.649.1210079867.12834.python-list@python.org>
	<dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
Message-ID: <1210082839.458.1251677385@webmail.messagingengine.com>

Hi James,

> What I was looking for was a commandline read loop that executes within a script that is already running ... or can optparse be used in
this context as well?

Apologies. I missed the nuance of the read loop within an already
running script.

Malcolm


From dotancohen at gmail.com  Thu May  8 20:04:10 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Fri, 9 May 2008 03:04:10 +0300
Subject: Write a python blog/website?
In-Reply-To: <0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
	<880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
	<0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>
Message-ID: <880dece00805081704i4f6c523o41fe65e645ceb890@mail.gmail.com>

2008/5/9 Sumon Sadhu <sumon.sadhu at gmail.com>:
> Hey Dotan,
>
> My apologies if this post caused offense. Your assertion is right, maybe i
> should have emailed everyone individually like i've done with the first 45
> sites, but it was never my intention to spam.

Sumon, I think that you do not understand the perception of spam in
technological circles. Today, there is no way to initiate contact with
a business offer via email. None. All email solicitations are
unwelcome. I tell you this to help you. I do not know if you receive
5000 spam messages a week like I receive, but know that a sizeable
portion of the Python list gets considerably more. These people hate
spam.

> We're programmers like yourself, trying to build something that provides a
> lot of benefit. You can see our intentions are genuine (and our python ad
> server was fun to build)

Actually, I am not a programmer by trade. I learn python for fun while
I study mechanical engineering. I read the python list for the wisdom
that passes, and rarely post.

> So while i appreciate your response, it was never my attention to be
> "spammy"

I recognized that from the beginning, and stated that in my original
post. Which should have been kept private between us, now I realize.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From gagsl-py2 at yahoo.com.ar  Mon May  5 23:43:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 00:43:12 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>
	<Xns9A9573FC740FBduncanbooth@127.0.0.1>
	<bce1b718-ad05-4ecf-9bb1-d2925bc57214@2g2000hsn.googlegroups.com>
Message-ID: <op.uapraaslx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 11:08:02 -0300, Szabolcs <szhorvat at gmail.com> escribi?:

> On May 5, 12:24?pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>> Szabolcs <szhor... at gmail.com> wrote:
>> > On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> >> Gabriel Genellina wrote:
>>
>> >> > Python doesn't require __add__ to be associative, so this should
>> >> > not be
>> > used as a general sum replacement.
>>
>> >> It does not _require_ this, but using an __add__ that is not
>> >> commutative and associative, or has side effects, would qualify as a
>> >> serious misuse, anyway.
>>
>> > Sorry, I meant associative only, not commutative.
>>
>> Unfortunately an __add__ which is not associative is actually perfectly
>> reasonable.
>
> Well, 'reasonable' is a subjective notion in this case :-)  I have
> never seen a non-associative use of the plus sign in maths, so I would
> tend to take associativity for granted when seeing a + b + c in code,
> therefore I would avoid such uses.  (Multiplication signs are a
> different story.)  Of course others may feel differently about this,
> and technically there's nothing in the way of using a non-associative
> __add__! :)

You're approaching Python from a mathematical point of view, I presume?
Python has a perfectly defined meaning for a + b + c: simply, expressions  
are evaluated from left to right  
<http://docs.python.org/ref/evalorder.html>.
a+b+c is the same as (a+b)+c and *not* the same thing as a+(b+c).  
Parenthesis aren't required in the first case, not because addition is  
associative, but because evaluation order is clearly defined.
__add__, __mul__ and all other special methods can be used (and in fact,  
*are* used) for many kind of objects, not just numbers; the Tree example  
by Duncan Booth is a perfectly valid application. (Of course this usage  
can be abused, as any other feature, but it's not so common)

-- 
Gabriel Genellina



From miller.paul.w at gmail.com  Tue May 13 23:12:47 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 20:12:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <60319f72-5bd3-49af-8485-c9130125dd1d@a1g2000hsb.googlegroups.com>

On May 13, 10:34 am, hdante <hda... at gmail.com> wrote:

>  The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.

I'll agree that software libre has the advantage in creating a
community, but the fact that this language's environment is
proprietary need not be fatal.  Consider the amount of work that gets
done every day using Maple, Matlab, and Mathematica, for instance.  I
like software that's free (as in beer or as in speech) as much as the
next guy, but I paid for the student version of Mathematica, and I
consider it worth every single penny.  I use it *at least* three or
four times a week, for stuff that'd be, at best, extremely tedious or,
at worst, impossible for me to do without it.

I took a quick look at this "Flaming Thunder," and downloaded the
command line Linux executable.  While I haven't tried anything
nontrivial in the language, I have to say it has several things going
for it:

* Cross-platform-ness.  I like the idea of being able to compile the
exact same source code for Linux, *BSD, Mac OS X, and Windows.  If it
truly is "write once, compile for the world," that's a nice plus.

* Nice web site.  Seriously.  The web site is pretty slick looking,
and that can only be a plus.  The design and color scheme definitely
remind me that this is an environment intended for scientific
computing.

* Nice name.  This has got to be *the* coolest thing about the
language.  I mean, how can you go wrong using a language named
"Flaming Thunder"? :)


From s.mientki at ru.nl  Tue May 13 18:43:33 2008
From: s.mientki at ru.nl (Stef Mientki)
Date: Wed, 14 May 2008 00:43:33 +0200
Subject: [ANN]  PPyGui emulator
Message-ID: <482A1995.5050702@ru.nl>

hello,

I've ran the first real world application through PPyGui-emulator,
so I think it's time to release the first version.
There's lot of room for improvements and a more beautiful layout.

PPyGui-emulator is build upon wxPython and released under BSD license.

For remarks, screen shots and downloads, see
http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html

have fun,

Stef Mientki


From inhahe at gmail.com  Fri May 16 10:15:36 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:15:36 -0400
Subject: ply yacc lineno not working?
References: <482D70F0.9070202@shopzeus.com>
	<mailman.1220.1210938144.12834.python-list@python.org>
Message-ID: <BEgXj.4833$Kk3.447@bignews9.bellsouth.net>

I dunno but on Dos/Windows a newline is usually \r\n (although that still 
includes a \n..)

"Laszlo Nagy" <gandalf at shopzeus.com> wrote in message 
news:mailman.1220.1210938144.12834.python-list at python.org...
> I'm sorry for the dumb question. I had to add these to the lexer:
>
> def t_comment(t):
>    r"\#[^\n]*\n"
>    t.lexer.lineno += 1
>    # We do not return anything - comments are ignored.
>
> # Define a rule so we can track line numbers
> def t_newline(t):
>    r'\n+'
>    t.lexer.lineno += len(t.value)
>
>
> Well, it is not very straightforward. From the docs, it was not clear that 
> I HAVE TO increment t.lexer.lineno in my lexer if you want yacc to parse 
> line numbers. But it is logical. I believe this could be done 
> automatically, since "line number" ALWAYS means "\n", there is nothing to 
> be configured here. (Am I wrong? There can be parsers to parse files where 
> new lines are chr(255) or something?)
>
> Thanks,
>
>   Laszlo
> 




From Lie.1296 at gmail.com  Sun May 18 09:34:10 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:34:10 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<mailman.838.1210309971.12834.python-list@python.org>
Message-ID: <74de3764-b926-4f7c-89b4-fe9aaec4ce96@w34g2000prm.googlegroups.com>

On May 9, 12:12?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 08 May 2008 22:57:03 -0300, ?
> <andrej.panj... at climatechange.qld.gov.au> escribi?:
>
>
>
> > On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> >> No, no, no, no, no!
> > Geez. ?Go easy.
> >> You have got it entirely wrong here. Your XOR function simply
> [...]
> > Pardon my tetchiness, but it is a little hard to receive such blunt
> > and inflexible replies to my posts.
>
> Don't take it so seriously. I would have written a reply in the same tone. ?
> Weeds must be uprooted early :)
>
> > Both the responses offer lambda free alternatives. ?That's fine, and
> > given the terse documentation and problems that I had understanding
> > them, I would agree. ?So what applications are lambdas suited to? ?I
> > think the parameterised function model is one.
> > What else?
>
> It should be clear now that lambda is just a shortcut for defining a ?
> normal function using "def", except it has no name, and it can handle ?
> expressions only (no statements).
> So you never *need* a lambda. But in a few cases they're useful:
>
> - Most GUIs are event-driven, and let you bind a function (or any other ?
> callable object) to be executed when certain event happens (by example, ?
> when certain button is pressed, or a menu item is selected). Usually an ?
> instance method is used: Button("Total", onclick=self.calculate_total). ?
> Suppose you're developing a calculator; the ten buttons labeled '0' to '9' ?
> should inserte the corresponding digit. To do that, you should write ten ?
> functions insert_digit_0 to insert_digit_9 (and they would be ?
> one-line-functions: insert_digit('0') ... insert_digit('9')). Too boring :(
> The usual idiom is something like this:
> ? ? ?Button("0", onclick=lambda: self.insert_digit('0'))
> ? ? ?Button("5", onclick=lambda: self.insert_digit('5'))
>
> - To write an expression that is to be evaluated lazily (perhaps only if ?
> certain other conditions are met). Older Python versions didn't have a ?
> conditional expression like C's :? ternary operator, and one possible way ?
> to emulate it is this:
>
> def iif(cond, if_true, if_false):
> ? ? ?if cond:
> ? ? ? ? ?return if_true()
> ? ? ?else:
> ? ? ? ? ?return if_false()
>
> iff(x!=2, lambda: 1/(x-2), lambda: 100)
>
> You can't write iff(x!=2, 1/(x-2), 100) because arguments are evaluated ?
> before the function is called, and with x=2 you get an error.
>

Calling iff would give a NameError. I wonder why... perhaps because
iif is so iffy?


From mmanns at gmx.net  Mon May 12 18:23:12 2008
From: mmanns at gmx.net (Martin Manns)
Date: Tue, 13 May 2008 00:23:12 +0200
Subject: ANN: pyspread 0.0.5
Message-ID: <mailman.1032.1210668518.12834.python-announce-list@python.org>

pyspread 0.0.5 has been released.

--

New features are:
+ X, Y, Z for relative cell relations are now pre-processed (easier to
use)
+ Cells can be given a name with <name>=<expresion>. These names are
located in the global namespace
+ Arrays and matrices within one cell can now easily be spread out to a
cell range in the grid with the spread function. (spread(x,y,z,value)
where x,y,z represents the top-left-front target cell and value is
replaced by the origin cell reference)
+ Rows and columns can be inserted and deleted
+ Copy, Paste and Delete behaviour improved
+ Copy and Paste now work in cell editor when no selection is present
+ Basic tab-delimited text import added

--

About: 
pyspread is a spreadsheet that accepts a pure python expression in
each cell.

--

Highlights:
+ No non-python syntax add-ons
+ Access to python modules from cells
+ 3D grid
+ Numpy object array for representation of string entry into grid cell
+ Numpy object array for representation of eval function array
+ Cell access via slicing of numpy function array
+ X, Y, and Z yield current cell location for relative reference

Requires: Python >=2.4, Numpy 1.0.4, and wxPython 2.8.7.1.
License: GPL

Project page: http://pyspread.sourceforge.net

Best Regards

Martin




From gagsl-py2 at yahoo.com.ar  Fri May 16 21:16:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 22:16:47 -0300
Subject: Malloc error
References: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>
Message-ID: <op.ua9xt9t8x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 16:08:41 -0300, mankoff <mankoff at gmail.com> escribi?:

> I'm brand spanking new to Python. Never coded in it, but I'm
> comfortable coding in general in other languages.

Welcome...!

> I'm Trying to get
> some legacy code to run on a newer machine. I don't have access to the
> legacy box for debugging.
>
> I'm getting the following error:
>
> Python(36979) malloc: *** error for object 0x88374: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug

Ouch. I'd like to think that the error doesn't come from Python itself but  
 from some compiled C extension. Are you using any?
I'd try with the same Python version the legacy box had, if it was older  
than 2.5.2

-- 
Gabriel Genellina



From cshirky at gmail.com  Mon May 12 11:05:39 2008
From: cshirky at gmail.com (cshirky)
Date: Mon, 12 May 2008 08:05:39 -0700 (PDT)
Subject: buffering choking sys.stdin.readlines() ?
Message-ID: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>

Newbie question:

I'm trying to turn a large XML file (~7G compressed) into a YAML file,
and my program seems to be buffering the input.

IOtest.py is just

  import sys
  for line in sys.stdin.readlines():
    print line

but when I run

$ gzcat bigXMLfile.gz | IOtest.py

but it hangs then dies.

The goal of the program is to build a YAML file with print statements,
rather than building a gigantic nested dictionary, but I am obviously
doing something wrong in passing input through without buffering. Any
advice gratefully fielded.

-clay


From wuwei23 at gmail.com  Wed May 21 06:04:37 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:04:37 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
Message-ID: <06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com>

On May 21, 6:58 pm, jonbutle... at googlemail.com wrote:
> Its not a variable I set, its one of HTMLParser's inbuilt variables. I
> am using it with urlopen to get the source of a website and feed it to
> htmlparser.
>
> def parse(self, page):
>         try:
>             self.feed(urlopen('http://' + page).read())
>         except HTTPError:
>             print 'Error getting page source'
>
> This is the code I am using. I have tested the other modules and they
> work fine, but I havn't got a clue how to fix this one.

You're not providing enough information. Try to post a minimal code
fragment that demonstrates your error; it gives us all a common basis
for discussion.

Is your Spider class a subclass of HTMLParser? Is it over-riding
__init__? If so, is it doing something like:

    super(Spider, self).__init__()

If this is your issue, looking at the HTMLParser code you could get
away with just doing the following in __init__:

    self.reset()

This appears to be the function that adds the .rawdata attribute.

Ideally, you should use the former super() syntax...you're less
reliant on the implementation of HTMLParser that way.

- alex23


From deets at nospam.web.de  Thu May 29 18:41:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 00:41:32 +0200
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <mailman.1747.1212084126.12834.python-list@python.org>
References: <mailman.1747.1212084126.12834.python-list@python.org>
Message-ID: <6a8pp3F32oqhfU1@mid.uni-berlin.de>

Sells, Fred schrieb:
> Diez wrote: 
>> Why don't you create KID-template like this:
>>
>> <div py:strip="True">${root}</div>
>>
>> and in the controller say
>>
>> @expose("thexmltemplate")
>> def ...
>>    return dict(root=myElementTreeRoot)
>>
> sounds good.  Does that "py:strip" remove the <div> and anything outside it.  I'll be doing a flex style ajax call and it wants just the xml data tree.

http://www.kid-templating.org/language.html#stripping-tags-py-strip

The time it took to ask the question would have answered it by just 
trying...

Diez



From notnorwegian at yahoo.se  Sun May 25 21:04:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:04:35 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
	<JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>
Message-ID: <5cae3f71-c699-4faa-97f3-d4c33e2daf9b@d77g2000hsb.googlegroups.com>

On 26 Maj, 01:30, I V <ivle... at gmail.com> wrote:
> On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> > i meant like set[pos], not iterate but access a specific position in the
> > set.
>
> If you need to access arbitrary elements, use a list instead of a set
> (but you'll get slower inserts). OTOH, if you just need to be able to get
> the next item from the set, you can use an iterator:
>
> > now i have to do:
> > s = toSet.pop()
> > toSet.add(s)
>
> i = iter(toSet)
>
> s = i.next()
>
> > if i want to get the url of the next item in a set, how would i do that?
> > i can do this with a list:
>
> > def scrapeSitesX(startAddress, toList, listPos): return
> > scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> > list.
> > i can work around that but it doesnt get as elegant.
>
> Do you have to use recursion here? Why not:
>
> for site in toList:
>         scrape(site)


i have tried both.

anyway how do i concatenate sets? which i have to if use to funcions
like you suggest.

and also when iterating a set is there any other way to avoid
exceptions than have a counter and compare to len(set).
is there no method that cna check if iter != None


From roy at panix.com  Fri May  2 23:38:39 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 23:38:39 -0400
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
Message-ID: <roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>

In article 
<80747335-9d08-48c9-bcc6-e66b6f2ef656 at l42g2000hsc.googlegroups.com>,
 "Giampaolo Rodola'" <gnewsg at gmail.com> wrote:

> Thanks a lot. I've been able to listen on ::1:21 after having
> installed IPv6 on both Windows and Linux thanks to your suggestions.
> I'd like to ask one more question: is it possible to bind my server on
> both IPv4 and IPv6 addresses (note: I do not use multiple threads or
> processes)?

In theory, you should be able to bind your server socket to an IPv6 port 
and have it accept connections from both IPv4 and IPV6 clients.  The v4 
connections will show up as IPv4-mapped IPv6 addresses (i.e. with a 
::ffff/96 prefix).  In practice, support for this is spotty.  The Wikipedia 
IPv4_mapped_address article claims, for example, that no windows OS prior 
to vista supports it.

In the application I work on, we've avoided this.  We just listen on two 
separate sockets (one for each address family).  We wrote a DualSocket 
class which manages the two underlying single-protocol sockets and makes 
them appear to be a single dual-protocol socket.  It was a lot of user code 
to write, compared with using the mapped address mechanism, but at least 
it's portable to every OS we've seen that support IPv6.

You don't need multi-threading to handle multiple sockets.  In our 
implementation, for example, we use select() in a single thread to 
multiplex the two.


From catphive at catphive.net  Fri May  2 15:20:04 2008
From: catphive at catphive.net (Brendan Miller)
Date: Fri, 2 May 2008 12:20:04 -0700
Subject: portable /dev/null
Message-ID: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>

Hi,

I have functions that take a file object and write to it. In some cases I
just want to throw out what is written to that file object. I want
something like open('/dev/null', 'w'), but portable.

It needs to have an underlying file descriptor/file handle, as it will be
passed to non python code.

Is there a portable /dev/null somewhere in the standard library?

Thanks,
Brendan


From kyosohma at gmail.com  Tue May  6 10:07:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 6 May 2008 07:07:01 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>

On May 6, 8:44?am, jmDesktop <needin4mat... at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces. ?Is
> that correct? ?Is my schooling for nought on these OOP concepts if I
> use Python. ?Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.) ?I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost. ?Thank you.

In my school, we didn't even discuss the concept of interfaces (except
for CLI and GUI, that is). So I looked it up. I assume you are
referring to something like what's found here:

http://java.sun.com/docs/books/tutorial/java/concepts/interface.html

If so, then it looks like an Interface is a generic class with method
stubs. You can do that with Python just as easily by creating empty
methods with just the "pass" keyword. It also reminds me of
Decorators...so you might want to look at those.

Since it's just a construct to implement polymorphism, I don't think
you'll lose anything. However, Python does not require you to re-
implement every method of the class it is inheriting from. You can
just override those that you want and leave the others alone.

Hopefully I understand this correctly...otherwise, just ignore my
babbling and hand waving.

Mike


From python-url at phaseit.net  Mon May 26 14:13:11 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 26 May 2008 18:13:11 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 26)
Message-ID: <g1eujn$jbn$1@lairds.us>

QOTW:  "GHUM:  There are no big applications written in Python.

GHUM:  Big applications are written in JAVA or COBOL or C# or other legacy
programming systems.

GHUM:  If you programm in Python, your applications become quite small. Only
frameworks in Python are big.

JMC:  So the fact that there are no big applications written in Python IS the
success story." - Harald Armin Massa and D'Arcy J.M. Cain
    http://coding.derkeiler.com/Archive/Python/comp.lang.python/2008-04/msg03005.html

    
    Assign a value and test for it in a single statement:
        http://mail.python.org/pipermail/python-list/2008-May/492988.html
        http://mail.python.org/pipermail/python-list/2008-May/492425.html
    
    D'Arcy J.M. Cain et al. combat the heterodoxy of David which questions
    the usefulness of unit tests and test-driven development in general:
        http://mail.python.org/pipermail/python-list/2008-May/493057.html
    
    Comparing identity vs. comparing equality: what's the difference?
        http://mail.python.org/pipermail/python-list/2008-May/492117.html
    
    Relationship between logic and interface: the MVC pattern:
        http://mail.python.org/pipermail/python-list/2008-May/492816.html
    
    It isn't easy to alter how functions compare themselves (to avoid
    duplicates, for example):
        http://mail.python.org/pipermail/python-list/2008-May/493182.html
    
    Organizing a project (directory layout):
        http://mail.python.org/pipermail/python-list/2008-May/492010.html
    
    Poll: How do you use Python in non-GUI work?
        http://mail.python.org/pipermail/python-list/2008-May/491989.html
    
    PHP compared to Python:
        http://mail.python.org/pipermail/python-list/2008-May/492561.html
    
    Is this language suitable for Operations Research?
        http://mail.python.org/pipermail/python-list/2008-May/491867.html
    
    Oldest thread still alive (from May 7): lambda expressions, now
    talking about decorators:
        http://mail.python.org/pipermail/python-list/2008-May/490027.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
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sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From moustafa.elmihy at gmail.com  Tue May  6 03:56:30 2008
From: moustafa.elmihy at gmail.com (moustafa.elmihy at gmail.com)
Date: Tue, 6 May 2008 00:56:30 -0700 (PDT)
Subject: read line
Message-ID: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>

hi every body,

I'm a new python user and I'm making a program to run useing Abaqus
and there is something I can't do,

if i have a text file that has a line like this " 10   20  30     40
50" and I wana do the coding to put every number of these like 10 or
20 in a separate variable .. any suggestions ??

thanks in advance


From darcy at druid.net  Wed May  7 07:23:27 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 7 May 2008 07:23:27 -0400
Subject: License selection for free software
In-Reply-To: <7xej8eirha.fsf@ruckus.brouhaha.com>
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
	<mailman.675.1210104317.12834.python-list@python.org>
	<7xej8eirha.fsf@ruckus.brouhaha.com>
Message-ID: <20080507072327.05199eba.darcy@druid.net>

On 06 May 2008 23:00:01 -0700
Paul Rubin <"http://phr.cx"@NOSPAM.invalid> wrote:
> "Matt Porter" <mabbikeel at gmail.com> writes:
> > > Python's non-GPL license certainly is annoying to some of us.
> > I'm intrigued - how can it be annoying?
> 
> It means GPL'd contributions can't be included in the main Python distro.

That's exactly what makes the GPL annoying to some of us.  It just
depends on your point of view.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From sturlamolden at yahoo.no  Tue May 20 18:47:29 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 15:47:29 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <5437a7a8-40bf-4858-a30b-a91220529463@b5g2000pri.googlegroups.com>

On May 20, 3:37 pm, brad <byte8b... at gmail.com> wrote:

> seen this first hand. Getting results back the same day or sooner may be
> important. In cases such as this, I use C or C++... nothing else will
> do. Nothing else is as fast.

Right. Tell that to the Fortran community. And by the way:

http://latticeqcd.blogspot.com/2006/11/why-we-use-fortran-and-python.html





From bearophileHUGS at lycos.com  Sun May 25 16:45:13 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 25 May 2008 13:45:13 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
Message-ID: <83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>

I V:
> You might instead want to
>wrap the lambdas in an object that will do the comparison you want:

This looks very nice, I haven't tried it yet, but if it works well
then it may deserve to be stored in the cookbook, or better, it may
become the built-in behavior of hashing functions.

Bye,
bearophile


From cokofreedom at gmail.com  Tue May  6 11:21:08 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 08:21:08 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <4dbd4d59-c4e5-4910-bcfd-7e0b2b3bbcef@59g2000hsb.googlegroups.com>

> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too.  On the dynamic typing,
> isn't that the same sort of thing that lots of scripting languages
> do?  VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in
> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  Thanks.

Well, school-wise we got taught VB because it was easy for the non-
programmers. At university I learnt Java, C++, Haskell, Fortran and
Python. My favourite is obviously Python.

So here is my terrible (likely wrong) view of Python:

Python is a dynamic programming language, different to static ones
like Java or C++, and variables-wise, well you do have types, but it
is up to the interpreter to understand what to do with them. From my
understanding "variables" as you call them can be the following;
Integer 1, String "Hello", Tuple (), List [], Dictionary {} and a
higher level function (you can assign functions as varaible names,
that personally is amazing!).

Python is built to be easy to read, I think Guido (BDFL) said
something about 10% of the time code is written, 90% it is read, or
something to that affect. The point is that anyone who knows Python to
even a small degree should be able to pick up someone elses code and
given a small time understand the idea of it, even with any comments.

That is very powerful and key to the idea of Python, and my main love
for it. The issue I get from University is this idea that OOP is the
way to program, it is one of the ways, not the be all and end all. I
almost died when I got shown Haskell because nothing made sense, but
after using Python and returning, I understood more of the logic
because I had used the same techniques (in a more readable format) in
Python before.

A common bug people suffer from when trying a new language is doing
things how they would in their previous language of choice. Python is
not Java, or C++ or anything else other than Python. So read a few
tutorials on Python, see what people say it is good at and use it for
that purpose.  I think it is an advantage to know how to do things
with different languages in different formats, but it is important to
know when to use one method over another. Personally DiveIntoPython
was a great guide for me as to the uses and benefits of Python, at a
basic level. Try googling it and reading the (free) articles and
tutorials online.

And welcome to Python, the grass is greener :)


From dannywebster at googlemail.com  Fri May  9 05:10:56 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 02:10:56 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
Message-ID: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>

Hello all,

I have a dictionary of which i'm itervalues'ing through, and i'll be
performing some logic on a particular iteration when a condition is
met with trusty .startswith('foo').  I need to grab the previous
iteration if this condition is met.  I can do something with an extra
var to hold every iteration while iterating, but this is hacky and not
elegant.

Is there a mechanism whereby I can just index the dict value
subscripts like in an array? I could just rewind by 1 if so.

Cheerz

dan.


From tomupton33 at yahoo.com  Thu May  1 10:23:24 2008
From: tomupton33 at yahoo.com (mickey333)
Date: Thu, 1 May 2008 07:23:24 -0700 (PDT)
Subject: free fiction-- look
Message-ID: <80dbac1d-81e6-4dae-b2bd-99aaf320d7e7@y38g2000hsy.googlegroups.com>

http://www.authspot.com/Short-Stories/Disability.107809


From kyosohma at gmail.com  Wed May  7 10:47:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 07:47:49 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com> 
	<mailman.705.1210170042.12834.python-list@python.org>
Message-ID: <b152cd19-836a-4629-870c-2a9bc6339c95@d45g2000hsc.googlegroups.com>

On May 7, 9:19?am, Tim Golden <m... at timgolden.me.uk> wrote:
> Mike Driscoll wrote:
> > On May 7, 4:45 am, Tim Golden <m... at timgolden.me.uk> wrote:
> >> In a spirit of being helpful... :)
>
> [... snip registry walker ...]
>
> > This is pretty cool stuff, Tim. Of course, it would also seriously
> > screw up some programs if you decided to replace the wrong phrase.
> > Just a word of warning to the OP: be sure to make a backup of the
> > registry before doing something like this. Trying to fix a messed up
> > registry from the command line is not a fun way to spend the
> > afternoon.
>
> Good point, Mike. In a spirit of being even more helpful... the _winreg
> module includes the functions SaveKey and LoadKey so as a crude
> backup mechanism, you could do this:
>
> <code snippet>
> import time
> import _winreg
> import win32api
> import win32security
>
> #
> # You need to have SeBackupPrivilege enabled for this to work
> #
> priv_flags = win32security.TOKEN_ADJUST_PRIVILEGES | win32security.TOKEN_QUERY
> hToken = win32security.OpenProcessToken (win32api.GetCurrentProcess (), priv_flags)
> privilege_id = win32security.LookupPrivilegeValue (None, "SeBackupPrivilege")
> win32security.AdjustTokenPrivileges (hToken, 0, [(privilege_id, win32security.SE_PRIVILEGE_ENABLED)])
>
> root = _winreg.OpenKey (_winreg.HKEY_LOCAL_MACHINE, r"Software\Python\TEST")
> #
> # This will fail if the file already exists so make it uniqueish
> #
> _winreg.SaveKey (root, "c:/temp/HKLM_Software_Python-%s.reg" % ?time.strftime ("%Y%m%d-%H%M%S"))
>
> </code snippet>
>
> Note that the file which this creates is *not* the same as a .reg file which the File > Export menu
> option provides from within the registry editor. (In fact, I shouldn't really have called it .reg; call
> it something else). It can be reloaded by the _winreg.LoadKey function -- which I notice is incorrectly
> named RegLoadKey in the docs after the underlying API call. The docs note that SeRestorePrivilege is
> required for this action, the counterpart to SeBackupPrivilege.
>
> TJG

Wow! Talk about going above and beyond the call of tutoring! I still
don't know how you found out how to do all these neat Windows tricks,
but I'll be filing them away for future reference.

Mike


From lists at cheimes.de  Tue May 13 18:38:44 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 00:38:44 +0200
Subject: Purpose of operator package
In-Reply-To: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <482A1874.6060105@cheimes.de>

Eric Anderson schrieb:
> Seems like unnecessary code but obviously I know nothing about Python.

Correct, the truth example isn't a good example. "if argv" is better.
But you can write interesting things with the operator module. For example

>>> import operator
>>> def fac(x):
...     return reduce(operator.mul, range(1, x+1))
...
>>> fac(2)
2
>>> fac(3)
6
>>> fac(4)
24

In general one doesn't use the operator module.

Christian



From jaywgraves at gmail.com  Tue May 20 14:45:18 2008
From: jaywgraves at gmail.com (jay graves)
Date: Tue, 20 May 2008 11:45:18 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <d020283f-b921-4806-b809-b7e4ef1a0a37@z24g2000prf.googlegroups.com>

On May 20, 1:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

How about this?

mov = open(afile)
first = mov.next()
# check first for ':' and do whatever you need to do
# including the 'y' processing from below if required
for line in mov:
        do y

...
Jay Graves


From fiacre.patrick at gmail.com  Fri May 23 01:44:17 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:44:17 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <mailman.1484.1211483172.12834.python-list@python.org>
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
	<mailman.1484.1211483172.12834.python-list@python.org>
Message-ID: <483659b1$0$11621$607ed4bc@cv.net>

Dan Upton wrote:
> On Thu, May 22, 2008 at 2:53 PM, Mensanator <mensanator at aol.com> wrote:
>> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>>
>>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>> If you actually need that many digits, use a different library.
>>
>>>>> import gmpy
>>>>> print gmpy.pi(64) # 64 bit precision
>> 3.14159265358979323846
>>>>> print gmpy.pi(128) # 128 bit precision
>> 3.141592653589793238462643383279502884197
>>>>> print gmpy.pi(16384) # 16384 bit precision
>> 3.14159265358979323846264338327950288419716939937510582097494459

...

> 
> Who wants to verify that that's correct to that many digits? ;)


Ramanujan?

http://numbers.computation.free.fr/Constants/Pi/piramanujan.html



From wuwei23 at gmail.com  Thu May 22 20:20:38 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 17:20:38 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com> 
	<2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com>
Message-ID: <369c3d5f-69e0-4609-9638-f75c7af94a4e@t12g2000prg.googlegroups.com>

On May 23, 5:06 am, jonbutle... at googlemail.com wrote:
> Nope, this is my first experience with object oriented programming,
> only been learning python for a few weeks but it seemed simple enough
> to inspire me to be a bit ambitious. If you could hook me up with some
> good docs that would be great. I was about to but a book on python,
> specifically OO based, but il look at these docs first. I understand
> most of the concepts of inheritance, just not ever used them before.

Ah, okay, I'm really sorry, if I'd known I would've tried to explain
things a little differently :)

Mark Pilgrim's Dive Into Python is a really good place to start:
http://www.diveintopython.org/toc/index.html

For a quick overview of object oriented programming in Python, try:
http://www.freenetpages.co.uk/hp/alan.gauld/
Specifically: http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm

But don't hesitate to ask questions here or even contact me privately
if you'd prefer.


From umpsumps at gmail.com  Wed May  7 16:00:48 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Wed, 7 May 2008 13:00:48 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<m2fxsu55ri.fsf@googlemail.com>
Message-ID: <55671aeb-fbd7-432e-b2f2-f558bc8e1702@s33g2000pri.googlegroups.com>

That's a great suggestion Arnaud.  I'll keep that in mind next time I
post code. Thanks ;)


On May 7, 12:27 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> umpsu... at gmail.com writes:
> > Hello,
>
> > Here is my code for a letter frequency counter.  It seems bloated to
> > me and any suggestions of what would be a better way (keep in my mind
> > I'm a beginner) would be greatly appreciated..
>
> > def valsort(x):
> >    res = []
> >    for key, value in x.items():
> >            res.append((value, key))
> >    return res
>
> > def mostfreq(strng):
> >    dic = {}
> >    for letter in strng:
> >            if letter not in dic:
> >                    dic.setdefault(letter, 1)
> >            else:
> >                    dic[letter] += 1
> >    newd = dic.items()
> >    getvals = valsort(newd)
> >    getvals.sort()
> >    length = len(getvals)
> >    return getvals[length - 3 : length]
>
> > thanks much!!
>
> I won't comment on the algorithm, but I think you should try to find
> better names for your variables.  In the snippet above you have x,
> res, dic, newd, length, getvals which don't give much of a clue as to
> what they are used for.
>
> e.g.
>
> * dic = {}
> We know it's a dict, but a dict of what?
>
> * newd = dic.items()
> Sounds like 'new dictionary', but obviously isn'tas it is a list
> of key,value pairs.
>
> * length = len(getvals)
> Again, we know it's a length, but the length of what?
>
> HTH
>
> --
> Arnaud



From sandip.more at gmail.com  Mon May  5 02:35:51 2008
From: sandip.more at gmail.com (sandipm)
Date: Sun, 4 May 2008 23:35:51 -0700 (PDT)
Subject: config files in python
Message-ID: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>

Hi,
 In my application, I have some configurable information which is used
by different processes. currently I have stored configration in a
conf.py file as name=value pairs, and I am importing conf.py file to
use this variable. it works well

import conf
print conf.SomeVariable

but if I need to change some configuration parameteres,  it would need
me to restart processes.

I want to store this data in some conf file (txt) and would like to
use it same way as I am using these variables as defined in py
files.

one solution I can think of is writing data as a dictionary into conf
file. and then by reading data, apply eval on that data. and update
local dict? but this is not a good solution....

any pointers?

Sandip


From amit.uttam at gmail.com  Fri May 16 20:34:56 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:34:56 -0700 (PDT)
Subject: Separate output for log file and stdout
Message-ID: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>

Hey everyone,

I've recently jumped big time into python and I'm working on a
software program for testing automation. I had a question about proper
logging of output. What I would like is:

 1. a function syslog (to log output to log file only)
 2. a function stdout (to log output to stdout only)
 3. a function sslog (to log output to both log and stdout)

Right now I am using StandOut module http://www.voidspace.org.uk/python/standout.html

It is quite useful but I can't seem to get good fine grained control
as my requirements.

How do the rest of you guys (gals) do this logging?

Thanks,
Amit


From duncan.booth at invalid.invalid  Thu May  8 05:46:37 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 09:46:37 GMT
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<Xns9A985A46AEA62duncanbooth@127.0.0.1>
	<ce2982c0-755f-4d89-8f5c-9c32384ae05e@y38g2000hsy.googlegroups.com>
Message-ID: <Xns9A986D951A8AFduncanbooth@127.0.0.1>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> 
> 
> Duncan Booth wrote:
>> Arnaud Delobelle <arnodel at googlemail.com> wrote:
>>
>> >
>> >
>> > George Sakkis wrote:
>> >> One of the few Python constructs that feels less elegant than
>> >> necessary to me is the del statement. For one thing, it is 
overloaded
>> >> to mean three different things:
>> >> (1) del x: Remove x from the current namespace
>> >> (2) del x[i]: Equivalent to x.__delitem__(i)
>> >> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
>> >
>> > Note that the 'X = Y' construct has the corresponding three 
meanings:
>> >
>> > (1) x = 4 # Bind x to 4 in the 'current namespace'
>> > (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
>> > (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>>
>> I think you both missed a case:
>>
>>   (1b) global x; del x    # Remove x from global namespace
>>   (1b) global x; x = 4    # Bind x to 4 in the global namespace
> 
> This is why you put 'current namespace' in quotes!  But all three of
> us missed the case:

I'd assumed you were just trying to say that the current namespace might 
be different things: locals or a class namespace. I would say that the 
global statement makes the assign/del refer to a non-current namespace.

> 
> (1-3000) What about nonlocal?

What about nonlocal? You can't (in Python 2.x) assign or del a name from 
an enclosing scope if that's what you mean. If that isn't what you mean 
then you'll have to explain it to me in simpler terms.



From floris.bruynooghe at gmail.com  Fri May  9 07:41:16 2008
From: floris.bruynooghe at gmail.com (Floris Bruynooghe)
Date: Fri, 9 May 2008 04:41:16 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org> 
	<3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>
Message-ID: <383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>

On May 9, 11:19?am, spectru... at gmail.com wrote:
> Thanks for the replies.
>
> On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
> > Ctrl+C often works with Python, but as with any language, it's possible
> > to write a program which will not respond to it. ?You can use Ctrl+\
> > instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> > Ctrl+\ sends SIGQUIT which typically isn't)
>
> Yes, thank you, this seems to work. :)
>
> I did some more testing and found out that the problem seems to be
> thread-related. If I have a single-threaded program, then Ctrl+C
> usually works, but if I have threads, it is usually ignored. For
> instance, the below program does not respond to Ctrl+C (but it does
> die when issued Ctrl+\):
>
> import threading
>
> def loop():
> ? while True:
> ? ? pass
>
> threading.Thread(target=loop,args=()).start()

Your thread needs to be daemonised for this work.  Othewise your main
thread will be waiting for your created thread to finish.  E.g.:

thread = threading.Thread(target=loop)
thread.setDaemon(True)
thread.start()

But now it will exit immediately as soon as your main thread has
nothing to do anymore (which is right after .start() in this case), so
plug in another infinite loop at the end of this:

while True:
    time.sleep(10)

And now your threaded app will stop when using C-c.


From mnikhil at gmail.com  Tue May 20 14:14:56 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:44:56 +0530
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
Message-ID: <g0v4f0$2ab$2@registered.motzarella.org>

Nikhil wrote:
> Hi,
> 
> I am using python -i, and I find it hard typing/pasting the commands 
> from the previous interactive shell. Basically, is there anyway that I 
> can preserve the history in the shell?
> I guess but not sure there should be something like ~/.pyrc for 
> configuring such but can someone please let me know what is the 
> effective environment variable to preserve the history?
> 
> Thanks,
> Nikhil
 >>there should be something like ~/.pyrc
please read it as something in a file pointed by PYTHONSTARTUP 
environment variable. I am mostly here interested in saving the python 
shell's history automatically.

Nikhil


From castironpi at gmail.com  Tue May 20 14:13:41 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 11:13:41 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
	<slrng35rce.8v2.nick@irishsea.home.craig-wood.com>
Message-ID: <3dfd6be8-b6ca-42b9-a46e-c4c520fda352@z72g2000hsb.googlegroups.com>

On May 20, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Monica Leko <monica.l... at gmail.com> wrote:
> > ?On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> > > You want your file considered as a sequence of bits rather
> > > than a sequence of 8-bit bytes, do you?
>
> > ?Yes.
>
> > > is the 10-bit bit-pattern to be stored at an arbitrary
> > > bit-position in the file
>
> > ?Yes. ?I need arbitrary, 8bits, than 10 bits for something else, than
> > ?sequence of bytes, than 10 bits again, etc.
>
> You could try
>
> ?http://construct.wikispaces.com/
>
> which could well do exactly what you want.
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Do you have space to waste?  If so, how much?  Worst case, you could
be looking at a factor of 32 or higher, if each bit took an entire
system word.


From frederic.degraeve at gmail.com  Thu May 22 09:18:20 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Thu, 22 May 2008 06:18:20 -0700 (PDT)
Subject: problem boost::python::import
Message-ID: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>

Hello,

I tried this code with vs7-8 and boost1.34.1-1.35.0 and my python is a
2.4. The call to Cpython works well but boost::python doesn't work.
I've got an exception about an access violation reading location
0x00000000.

help, please?

thank you.
Fr?d?ric


#include "stdafx.h"
#include <boost/python.hpp>
#include <iostream>
#include <stdexcept>
#include <cassert>

using namespace boost::python;

int _tmain(int argc, _TCHAR* argv[])
{
	Py_Initialize();
	PyObject* pSys = PyImport_ImportModule("sys");  // works

	boost::python::object sys = boost::python::import("sys"); // doesnt
work

    return 0;
}


From castironpi at gmail.com  Tue May 13 11:29:44 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:29:44 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <8ca0c1c9-3c53-4c17-853a-d042066ca773@l64g2000hse.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

What is about $0?


From paddy3118 at googlemail.com  Wed May 21 18:35:07 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 21 May 2008 15:35:07 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <7a3506f4-0e07-47bb-a22e-901624c1dc5b@j22g2000hsf.googlegroups.com>

On May 21, 10:38 am, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

You could use named groups to search for all three patterns at once
like this:


original:

  prog1 = re.compile(r'pat1')
  prog2 = re.compile(r'pat2')
  prog3 = re.compile(r'pat3')
  ...

Becomes:

  prog = re.compile(r'(?P<p1>pat1)|(?P<p2>pat2)|(?P<p3>pat3)')
  match = prog.match(line)
  for p in 'p1 p2 p3'.split():
    if match.groupdict()[p]:
      do_something_for_prog(p)


- Paddy.



From deets at nospam.web.de  Mon May 26 08:25:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 14:25:16 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
	<et3l3414bkub2f4ra3b67i8ljkumu36lll@4ax.com>
Message-ID: <69voiaF35hdm5U1@mid.uni-berlin.de>

> If you hate PHP, that's OK, but it doesn't make PHP a bad or even
> inferior language.

No. That is PHP on it's own that makes it an inferior language. It is suited
(and surprisingly well) for the task of creating webapps. But the language
core? Plain ugly. Examples include (in arbitrary order and not complete)

 - bolted-on Object-system 
 - lack of binary extension API 
 - ONE collection type to rule them all!!
 - stateful collection iteration (come *on*, calling reset on an array!)
 - no namespaces (according to
http://www.php.net/manual/en/language.namespaces.php they are planned -
good)
 - copy-by-value semantics with a crude reference-mechanism to mitigate that
 - inconsistent APIs all over (DB-connectivity for example). Yes, I know
about PEAR::DB. But somebody "designed" the real DB apis. Or actually
didn't. Which 
 - no concept of higher order functions - you pass around function-*names*.
Which of course works because of one flat namespace. Wonder how it will
work if NS get real

Oh, and one of my real favorits: NO SUB-EXPRESSIONS. You can't write

$foo = $array1[$key1][$key2][$key3]

I'm wondering how to write a language that *doesn't* allow for that...

And before you ask: yes, I've written PHP, more than enough and larger
systems in it with a few K-loc. I even encountered weird bugs (PHP 4.0.x,
has been a while) that made PHP forget function definitions! You could
re-load a page if a function was missing, and it magically appeared. and
you could *fix* this turning off some warn/log-level. Again - I don't even
*know* how to program something like a language that behaves that way. And
it certainly puts the language into the worst light imaginable. buggy
libraries and extensions? No deal, can happen. But core features like
that - should work.

having said all this - I see the benefits of PHP. It is easy to start for
non-programmers, you can get it for virtually no cost at all for
web-development tasks, you don't need to bother with stuff you have to deal
in python web-frameworks like setting up mod_wsgi, mod_python or mod_proxy.

But it is a hack. Don't pretend otherwise.      

Diez


From qwertymaniac at gmail.com  Sun May 25 16:26:01 2008
From: qwertymaniac at gmail.com (Qwerty Maniac)
Date: Mon, 26 May 2008 01:56:01 +0530
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <977f7e7a0805251326v4f3d169co65cbe3c861e40f1@mail.gmail.com>

Like what others said, use the Decimal class to avoid this.

from decimal import Decimal
x=Decimal(5)
x/=2
x*=Decimal("11.4")
print x
# 28.50

On Mon, May 26, 2008 at 1:28 AM, <notnorwegian at yahoo.se> wrote:

> >>> x = 5
> >>> x /= 2
> >>> x
> 2
> >>> x *=11.4
> >>> x
> 22.800000000000001
>
> ok where does the 1 in the come from?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Harsh J
www.harshj.com
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From inhahe at gmail.com  Tue May 20 17:19:10 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 17:19:10 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
Message-ID: <aeHYj.12642$hv2.679@bignews5.bellsouth.net>

"castironpi" <castironpi at gmail.com> wrote in message 
news:29451c2a-cb0a-43a6-b140-6c16e3cb46ac at c65g2000hsa.googlegroups.com...
> I'd like a persistent deque, such that the instance operations all
> commit atomicly to file system.

ok, i made your persistent deque.  but there are two important notes 
regarding this module:  1) I am a genius.  2) it doesn't actually work for 
some reason.  i.e., loading an instance from file won't work.  i don't know 
why.  the pickle module is doing something i didn't expect.


from collections import deque
import os, pickle, random

class pdeque(deque):
  def __init__(self, filename, initial):
    deque.__init__(self, initial)
    self.filename = filename
    self.tempfilename = ''.join((random.choice("abcdefghijklmnopqrstuvwxyz") 
for x in xrange(10)))+".tmp"
    self.save()
  def save(self):
    pickle.dump(self, open(self.tempfilename,'wb'))
    try: os.remove(self.filename)
    except: pass
    os.rename(self.tempfilename, self.filename)
  @classmethod
  def load(cls, filename):
    return pickle.load(open(filename,'rb'))

for name in "append appendleft extend extendleft remove rotate".split():
  func = getattr(deque, name)
  def func2(instance, arg, func=func):
    result = func(instance, arg)
    instance.save()
    return result
  setattr(pdeque, name, func2)

for name in ("pop", "popleft", "clear"):
  func = getattr(deque, name)
  def func2(instance, func=func):
    result = func(instance)
    instance.save()
    return result
  setattr(pdeque, name, func2)


---

you use it just like a deque object except that when initializing the first 
parameter is a filename for it to store in.   to load the deque object again 
later, call .load(filename) on the pdeque class or a pdeque object (except 
that it doesn't work.)

i'm sure somebody here knows what obscure feature of pickling it is that's 
doing this counterintuitively.  (disclaimer: i've never used pickle to store 
a custom type before)





From roy at panix.com  Sat May 24 09:29:10 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:29:10 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>

In article <mailman.1525.1211632496.12834.python-list at python.org>,
 David <wizzardx at gmail.com> wrote:

> Hi list.
> 
> What strategies do you use to ensure correctness of new code?
> 
> Specifically, if you've just written 100 new lines of Python code, then:
> 
> 1) How do you test the new code?
> 2) How do you ensure that the code will work correctly in the future?

There's various philosophies about this (and none of them are specific to 
Python), but I like a process called Test Driven Development (TDD).

In TDD, you invert the order you describe above.  First write the test, 
then write the code to make the tests pass.  What I usually do is write the 
documentation first, then write some tests that assert things the 
documentation says, then write the code.

Python has several testing modules; unittest and doctest come with the 
system, and there's a couple of other third-party modules that have sprung 
up.  I find unittest works well for me and stick with that.

I work in small increments, writing one test at a time, then some code, 
then another test, then some more code, etc.  In fact, I take this to what 
many people might call an extreme.  When I sit down to write a class, the 
first test I write is one that just instantiates an instance of that class 
with no arguments.  Then a write the stub class:

class foo:
   pass

and see that the test works.  If I'm feeling really expansive, I'll write a 
more sophisticated version:

class foo:
   def __init__(self):
      pass

and use that to satisfy my initial test.  Then it's just later, rinse, 
repeat until the class is done, fully documented, and fully tested.

> For (1) I thoroughly (manually) test code as I write it, before
> checking in to version control.

I agree with the idea that it's fully tested before checking it in, but not 
with the manual testing.  In my mind, any test that's not fully automated 
might as well not exist.


From daveparker at flamingthunder.com  Mon May 12 20:54:21 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:54:21 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
Message-ID: <851ece67-4a3a-4d1c-925c-c9e3f5e081ba@b9g2000prh.googlegroups.com>

On May 12, 6:32?pm, castiro... at gmail.com wrote:
> Can you render some furniture for me... to try to see some human
> posture to lowest energy levels.

Not yet; Flaming Thunder doesn't have built-in graphics yet.  But
we're incorporating the graphics from www.dpgraph.com , so when that's
finished, then yes Flaming Thunder will be able to render furniture
and calculate energy levels.

If I remember correctly, I think that NASA did some experiments many
years ago on human posture and found that laying back (like the
astronauts do at takeoff) minimized stress on the human body due to
high g-forces.


From daveparker at flamingthunder.com  Tue May 13 09:25:27 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:25:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
Message-ID: <c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>

On May 12, 11:52?pm, castiro... at gmail.com wrote:
> I do hold an argument that one can make too much money for one's own
> good quality of life.

As do I; I think there is an optimal amount.  Too little, and you
waste time gathering food.  Too much, and you waste time gathering
money.

> Am I trying to visualize thermal (and ergo
> possibly chemical too) gradients (thermovoltaic)? ?Yes in part.

Some of those DPGraph (and soon, Flaming Thunder) may be able to help
with.

> I'm pretty generally interested, but where can print layout take you?

Not far, especially with books disappearing.  Our library says that
these days, only 25% of their checkouts are books; the other 75% are
DVDs, CDs, etc.

> Microsales?

And getting microer every day.


From GMan67 at pduck.com  Wed May 28 11:03:32 2008
From: GMan67 at pduck.com (GeoffreyF67)
Date: Wed, 28 May 2008 08:03:32 -0700 (PDT)
Subject: Using PEFile to replace Images in PE EXE
Message-ID: <46f79833-5ecb-4d20-91dd-25f9d0fc4a14@y38g2000hsy.googlegroups.com>

I am trying to script some image changes for multiple EXE files in
linux.

The problem I'm running across is that I haven't been able to find
anything out there that can do this...until now.

It *looks* like pefile (available at google code) would do the trick.

Unfortunately I know absolutely nothing about python.

Any ideas/hints/tips appreciated.

Thanks,

G-Man


From mankoff at gmail.com  Sat May 17 21:37:26 2008
From: mankoff at gmail.com (mankoff)
Date: Sat, 17 May 2008 18:37:26 -0700 (PDT)
Subject: Malloc error
References: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>
	<mailman.1264.1210987033.12834.python-list@python.org>
Message-ID: <7624f523-ff31-439b-9424-2442d6198404@x35g2000hsb.googlegroups.com>

On May 16, 9:16?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 16:08:41 -0300, mankoff <mank... at gmail.com> escribi?:
>
> > I'm brand spanking new to Python. Never coded in it, but I'm
> > comfortable coding in general in other languages.
>
> Welcome...!
>
> > I'm Trying to get
> > some legacy code to run on a newer machine. I don't have access to the
> > legacy box for debugging.
>
> > I'm getting the following error:
>
> > Python(36979) malloc: *** error for object 0x88374: Non-aligned
> > pointer being freed
> > *** set a breakpoint in malloc_error_break to debug
>
> Ouch. I'd like to think that the error doesn't come from Python itself but ?
> ?from some compiled C extension. Are you using any?
> I'd try with the same Python version the legacy box had, if it was older ?
> than 2.5.2
>
> --
> Gabriel Genellina

You're right. I was using some C extensions. The bug was there. I've
fixed it and everything appears to be working.

Thanks,

   -k.


From fetchinson at googlemail.com  Sun May 18 19:18:36 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Sun, 18 May 2008 16:18:36 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <fbe2e2100805181618i5fc4d1b4n9e458951f8910cac@mail.gmail.com>

> Hey all. Just thought I'd ask a general question for my own interest. Every
> time I think of something I might do in Python, it usually involves creating
> a GUI interface, so I was wondering what kind of work you all do with Python
> that does *not* involve any GUI work. This could be any little scripts you
> write for your own benefit, or what you do at work, if you feel like talking
> about that! :)

web apps
manage/format/write cv
convert jpg to gif
start/stop/manage parallel runs on a PC cluster
etc :)

Actually, I've never written anything with a GUI (unless you count web apps).

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From wuwei23 at gmail.com  Wed May 21 06:08:40 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:08:40 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com>
Message-ID: <10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com>

On May 21, 8:04 pm, alex23 <wuwe... at gmail.com> wrote:
> Is your Spider class a subclass of HTMLParser? Is it over-riding
> __init__? If so, is it doing something like:
>
>     super(Spider, self).__init__()
>
> If this is your issue[...]

I'm sorry, this really wasn't clear at all. What I meant was that you
need to call the HTMLParser.__init__ inside your Spider.__init__ in
order to have it initialise properly. Failing to do so would lead to
the .rawdata attribute not being defined. The super() function is the
best way to achieve this.

Sorry for the rambling, hopefully some of that is relevant.

- alex23


From wuwei23 at gmail.com  Wed May 21 02:02:22 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 20 May 2008 23:02:22 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
Message-ID: <c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com>

On May 21, 8:53 am, Xah Lee <x... at xahlee.org> wrote:
> The complaint about python doc has turned up
> now and then in the past few years it seems, but always got put down
> by python priests

No, what was generally rejected was the idea that *you* could bring
more clarity to the documentation, based on the complete absence of it
in your posts & "essays". Basically, noone wanted docs that would
randomly degenerate into ad hominem accusations of elitism aimed at
the module authors.

Nothing is stopping you from making doc changes and submitting them
for review now, unless grandstanding is your actual intent.


From nick at craig-wood.com  Thu May 22 16:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 15:30:07 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
Message-ID: <slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>

Mel <mwilson at the-wire.com> wrote:
>  Mensanator wrote:
> > On May 22, 10:30??am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> >> Dave Parker <davepar... at flamingthunder.com> wrote:
> >> > But after getting input from children and teachers, etc, it started
> >> > feeling right.
> >>
> >> > For example, consider the two statements:
> >>
> >> > x = 8
> >> > x = 10
> >>
> >> > The reaction from most math teachers (and kids) was "one of those is
> >> > wrong because x can't equal 2 different things at the same time".
> >>
> >> This is a common feature in functional languages...
> >>
> >> Eg
> >>
> >> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> >> [async-threads:0] [kernel-poll:false]
> >>
> >> Eshell V5.6.2 ??(abort with ^G)
> >> 1> X = 8.
> >> 8
> >> 2> X = 10.
> >> ** exception error: no match of right hand side value 10
> >> 3>
> >>
> >> That error message is the erlang interpreter saying "Hey I know X is
> >> 8, and you've said it is 10 - that can't be right", which is pretty
> >> much what math teachers say too...
> > 
> > Are you saying that erlang treats 1> as an assignment, yet
> > treats 2> as a comparison?
> > 
> > That's inconsistent. No wonder nobody uses erlang.
> 
>  In Prolog terms, they're both unification.  If X has never been defined you
>  can define it as 8 with no chance of contradicting anything.  Once X is 8,
>  the proposition "X is 10" is false.
> 
>  I act as though Erlang thinks the same. My Erlang chops aren't as good as my
>  Prolog chops were.

I had to look up the definition of unification, but yes you are right,
erlang and prolog seem mean roughly the same thing by the = sign.  It
is called the pattern matching operator in erlang.

>From Armstrong's book: The expression Pattern = Expression causes
Expression to be evaluated and the result matched against Pattern. The
match either succeeds or fails. If the match succeeds any variables
occurring in Pattern become bound.

It is a very powerful idea and one which (along with the concurrency
and message passing from Erlang) has been implemented for python :-

  http://candygram.sourceforge.net/

I've been reading the Erlang book and I have to say it has given me a
lot of insight into python...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 08:01:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 14:01:45 +0200
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <483aa6ac$0$3492$426a74cc@news.free.fr>

Joe P. Cool a ?crit :
> On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> Sh4wn <luckyluk... at gmail.com> writes:
>>> first, python is one of my fav languages, and i'll definitely keep
>>> developing with it. But, there's 1 one thing what I -really- miss:
>>> data hiding. I know member vars are private when you prefix them with
>>> 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
>>> before it.
>> From whom are you trying to hide your attributes?
> 
> I saw this "don't need it" pattern in discussions about the ternary
> "if..else" expression and about "except/finally on the same block
> level".
> Now Python has both. Actually it is very useful to be able to
> distinguish
> between inside and outside.

Doing it the Python way makes the distinction pretty obvious : 
implementation stuff names all start with an underscore. You just can 
not miss it.

> This is obvious for real world things e.g.
> your
> TV. Nobody likes to open the rear cover to switch the channel.

Nope, but when the switch is broken and the TV not under warranty no 
more, I'm glad I can still open the rear cover and hack something by 
myself, despite usual (and hard to miss) "no user serviceable parts 
inside" and "warranty void if unsealed" warning stickers.


> Similar
> arguments apply to software objects. "data hiding" is a harsh name, I
> would
> call it "telling what matters".

Which is exactly what we do using naming convention.

>> In Python, the philosophy "we're all consenting adults here" applies.
> 
> Please don't sell a missing feature as a philosophy. Say you don't
> need/want
> it. But don't call it philosophy.

Please understand that not having access restriction is a design choice, 
not a technical inability (and FWIW the rationale behind that design 
choice has been debated to hell and back). So yes, it's is actually a 
'philosophic' problem.

>> You shouldn't pretend to know, at the time you write it, all the uses
>> to which your code will be put.
> 
> It's *your* *decision* which uses will be available. Your explanation
> appears
> to me as a fear to decide.

Nope, just a matter of experience.

>> If you want the users of your code to know that an attribute should
>> not be used as a public API for the code, use the convention of naming
>> the attribute with a single leading underscore.
> 
> Littering your class definition with dozens of underscores is exactly
> the
> line noise we love to criticize in Perl.

At least it makes what's 'inside' and what's 'outside' very obvious, 
isn't it ?

>>> Python advertises himself as a full OOP language, but why does it
>>> miss one of the basic principles of OOP?
>> Who taught you that enforced restrictions on attribute access was a
>> "basic principle" of OO?
> 
> Nearly every introduction to OOP?

Nearly every introduction to OOP is crap. Nearly every introduction to 
OOP also introduces classes and inheritance as "basic principle" of OO. 
Almost none introduction to OOP actually talk about *objects* - instead, 
they introduce mostly what Stroustrup and Gostling understood of OOP.

> Please don't tell me that
> encapsulation
> does not mean "enforced restriction".

What about : "encapsulation does not mean *language enforced* 
restriction" then ?

To me, encapsulation means that - as a client - you do not *need* to 
care about implementation details, not that you can not get at it. And 
while data hiding is indeed a possible mean to enforce some kind of 
encapsulation, it's not quite the same thing.



From cwitts at gmail.com  Wed May 28 05:25:52 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 02:25:52 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
	<3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>
Message-ID: <ee91c351-ca4b-43da-804c-3c91c6264ec0@a1g2000hsb.googlegroups.com>

On May 28, 10:59?am, s0s... at gmail.com wrote:
> On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
>
>
>
> > s0s... at gmail.com wrote:
> > > I wanted to ask for ways to test whether a path exists. I usually use
> > > os.path.exists(), which does a stat call on the path and returns True
> > > if it succeeds, or False if it fails (catches os.error). But stat
> > > calls don't fail only when a path doesn't exist. I see that, at least
> > > on Windows, the instance of the exception has an attribute 'errno' set
> > > to 2 when it fails because the path doesn't exist. Is it a portable
> > > solution to rely on this (haven't tried it on Linux)? Are there other
> > > ways of testing whether a path exists?
>
> > > Thanks,
> > > Sebastian
>
> > "import errno" and see if the exception's errno attribute is set to
> > errno.ENOENT (which is, yes, 2). It is portable.
>
> > If you Google [ENOENT Windows] or whatever, there are some differences
> > on different platforms, but not many.
>
> Thanks. So if OSError().errno == errno.ENOENT, then it means the path
> doesn't exist? (What does "ENOENT" stan for?)

http://books.google.co.za/books?id=MvoetCEgMRMC&pg=PA398&lpg=PA398&dq=enoent+meaning&source=web&ots=31Ik2wY4NZ&sig=NUvvA1LTMDG0x4XK0x7142FEeNI&hl=en

ENOENT - Invalid Entry (file or directory)


From bruno.desthuilliers at gmail.com  Mon May 19 16:25:20 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:25:20 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>

On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
wrote:
> Bruno Desthuilliers schreef:
>
> > 1/ being interpreted or compiled (for whatever definition of these
> > terms) is not a property of a language, but a property of an
> > implementation of a language.
>
> > 2/ actually, all known Python implementations compile to byte-code.
>
> You keep saying that, and in theory you're right.

"In theory" ??? Heck, both points above are mere facts. Well, I may
accept that the 2nd one is a bit overgeneralized, since IIRC there's
an experimental Python to javascript "compiler" in Pypy, but...

>  But I'm still inclined to disagree with it,  since the practical reality is different.

Do you mean that how source code written in a language (that is : a
grammar  + a syntax) finally become a set of instructions executed by
a CPU depends on the language (I repeat : a grammer + a syntax), and
not on a piece of software turning the source code into something that
can actually be executed by the CPU ? Or that there exists  a (working
and usable) implementation of the Python language that does not use an
intermediate byte-code compilation ? If the latest, I'd happly
recognize my error if proven wrong. But on the first point, I'm afraid
that, well, a fact is a fact is a fact.

> Python is
> indeed compiled to byte code, but if you compare that byte code with
> assembly code you'll see that there's a whole world of difference
> between the two,

Obviously, yes - at least for all assembly language I've seen so far.
But whoever said otherwise ?

>  largely because of the dynamical nature of Python. Fact
> is that Python was designed from the start to run on a virtual machine,
> not on the native hardware.

Nope. The facts are that
1/ Python (the language) has *not* been designed with ease of
implementation of an optimizing native-code compiler in mind,  and
2/ CPython (the first and reference implementation) has been designed
to use a byte-code + VM scheme

> C OTOH was designed to be compiled to assembly code (or directly to
> machine code)

Note quite. C has been designed to make it as easy as possible to
write either a C to assembly or C to native binary code compiler.

> and as a result there are no (or virtually) no
> implementations that interpret C or compile it to bytecode.

There's at least one (possibly incomplete) C interpreter. FWIW, it
would not be harder (and possibly simpler) to write a byte-code+VM
based C implementation than it is to write CPython, Jython or
IronPython. The point is that it's just useless - C is a (very) low-
level language, and the only reason to use C is that you'll find a
pretty good optimizing native-code compiler on almost any platform -
sometimes even before the CPU physically exists.

> I love Python, but IMHO it's a bit silly to maintain that the fact that
> Python compiles to byte code instead of assembly code/machine code is
> purely a matter of implementation; on the contrary, I believe it's a
> result of its design.

There's a very naive belief we saw every here and then here, which is
that "Python would be faster if it was compiled to native code". The
point is that, given Python's (as a language) extrem dynamism,
compiling it to native code wouldn't buy you much in terms of raw
performances. The problem is not with writing a native-code
compiler[1}, but with writing an *optimising* native-code compiler.
FWIW, even Java with it's brain-dead static type-system gained more
from JIT compilation in the VM than from being directly compiled to
native code.

[1]  not that I would personnaly be able to do so in a reasonable
amount of time, but given how many talented programmers have been and
are still working on making as fast as possible Python implementions,
it seems obvious that such a thing would already exists if there was
any point working on it.

> I also think that there's a large difference
> between byte code and machine code

No ? Really ? Now *this* is a scoop, you know ? <g>

> (in Python's case; I haven't looked
> at other languages), and that it's a bit silly to try to trivialize that
> difference.

I'm not trying to "trivialize" anything. I'm just getting fed up with
this "Python is an interpreted and therefore slow language" non-
sense.  Python is a language, and as such is neither slow nor fast nor
interpreted nor compiled nor <insert any implementation related stuff
here>. And while CPython is not blazingly fast for computation-heavy
stuff, it's not because it is "interpreted" - which it is not for a
strict definition of "interpreted", but anyway...  - but because
*optimizing* execution of an highly dynamic language is nothing,
well,  err, trivial.



From gagsl-py2 at yahoo.com.ar  Sat May 24 20:11:52 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 21:11:52 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
Message-ID: <op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 21 May 2008 07:44:50 -0300, Casey McGinty <casey.mcginty at gmail.com> escribi?:

Just my own opinion on these things:

> 1. Script code should be as basic as possible, ideally a module import line
> and function or method call. This is so you don't have to worry about script
> errors and/or increase startup time because a *.pyc file can not be store in
> /usr/bin.

Scripts are not compiled by default, only imported modules (anyway you could compile scripts by hand). Keeping the main script short might reduce the startup time, yes.

> 2. In the top of your package directory it is typical to have a module name
> '_package.py'. This is ideally where the main command line entry point for
> the package code should be placed.

Why the underscore? And I usually don't put executable scripts inside a package - I consider them just libraries, to be imported by other parts of the application.
It's easier to test too when your tests *and* the application code are external to the package itself.

> 3. In the _package.py file you should add a "class Package" that holds most
> or all of the application startup/execution code not designated to other
> modules. Then run the application with the call to "Package()", as in
>
>     if __name__ == '__main__':
>        Package()

In Python that doesn't *have* to be a class, and in fact, most of the time I use a function instead. Something like this:

def main(argv):
     # do things

if __name__ == '__main__':
     import sys
     sys.exit(int(main(sys.argv) or 0))

> Some other questions I have are:
> A. What should go in the package __init__.py file? For example, a doc
> describing the program usage seems helpful, but maybe it should have info
> about your modules only? Assuming the __init__.py code gets executed when
> you import the module, you could place part or all of the application code
> here as well. I'm guessing this is not a good idea, but not really
> convinced.

Yes, the __init__.py is executed when you import the package. And no, I don't think it's a good idea to put all the application code there. As I said above, I consider packages *libraries*, the application code should *import* and use them, but not reside *inside* a package.
And there is the "import lock" issue too - I'm unsure of this but I think a lock is held until the import operation finishes, and that would happen only after __init__.py is fully executed.

> B. How should you import your _package.py module into your /usr/bin script.
> Is there a way to use an '__all__' to simplify this? Again this goes back to
> question A, should there be any code added to __init__.py?

I don't get the question... you import it as any other module (but I would not use a _package.py file anyway)

> C. If you have a _package.py file as the application entry, is it worth it
> to place most of the application code in a class, described in part 3?

As I said, I'd use a function, at least at the top level. Of course it can create many other objects.

> D. When I import a package._package module, I get a lot of junk in my
> namespace. I thought an '__all__' define in the module would prevent this,
> but it does not seem to work.

`import package._package` should only add "package" to the current namespace. If you're using `from package import *` - well, just don't do that :)
Otherwise I don't understand what you mean.

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Sun May 25 06:14:41 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 10:14:41 +0000 (UTC)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
Message-ID: <g1be6h$1guc$1@news.mtu.ru>

Robbie wrote:
> I can't seem to figure out where to put this file so that Python will
> recognize it when I start it up.

You need to put this file in your site-packages directory.
To get the location of your site-packages directory, type in Python 
interactive shell:

from distutils.sysconfig import get_python_lib
print get_python_lib()

-- Ivan




From skanemupp at yahoo.se  Thu May 15 08:27:10 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 05:27:10 -0700 (PDT)
Subject: datamining .txt-files, library?
Message-ID: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>

i have a big collection of .txt files that i want to open and parse to
extract information.

is there a library for this or maybe even built in?


From castironpi at gmail.com  Sun May  4 17:03:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 14:03:41 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
	<53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
	<mailman.528.1209905380.12834.python-list@python.org>
Message-ID: <f955c3d6-2b7e-48f2-8528-a95a1b34ea6c@2g2000hsn.googlegroups.com>

On May 4, 7:49?am, David <wizza... at gmail.com> wrote:
> > ?> D compiles to efficient machine code so Python is at a disadvantage
> > ?> even if you use the same syntax (see my first example). You can make
> > ?> the Python version faster, but beware of premature optimization.
>
> > ?This time I don't agree with this "premature optimization" thing. My
> > ?original Python version is just 5 lines long, it's readable enough,
> > ?and it's a part of a large library of mine of similar functions, they
> > ?must be fast because I use them all the time as building blocks in
> > ?programs.
>
> Have you looked into the 'numpy' libraries? Those have highly
> optimized array/numeric processing functions. Also the have a concept
> of getting 'views' when you slice, rather than a full copy.
>
> I also suggest benchmarking your apps which use your libs and see
> where the bottlenecks are. Then you can move those to external
> compiled modules (c/pyrex/cython/shedskin/etc). You can keep your
> slower Python version around as a reference implementation.
>
> > ?> What I'dlike to see is a rope[1] module for Python.
>
> > ?People have already suggested it, and there's even an implementation
> > ?to replace Python strings. It was refused because... I don't know why,
> > ?maybe its implementation was too much more complex than the current
> > ?one, and it wasn't faster in all situations (and I think Guido wants
> > ?data structures that try to replace the basic built-in ones to be
> > ?faster in all situations and user-transparent too).
>
> I'd be happy if there was a separate 'rope' class that you could wrap
> arbitrary long sequences in when you need to (the same way that STL
> has it separate to the string class, even though the string class has
> a lot of other optimizations (internal ref counts, etc, to avoid
> unnecessary copies)). Do you know one?
>
> David.

Persistence on the rope class might be trivial; that is, a constant
number of disk modifications be made per state modification.


From johnjsal at NOSPAMgmail.com  Sat May 10 22:19:54 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 11 May 2008 02:19:54 GMT
Subject: Is using range() in for loops really Pythonic?
Message-ID: <482657ca$0$25026$607ed4bc@cv.net>

I know it's popular and very handy, but I'm curious if there are purists
out there who think that using something like:

for x in range(10):
    #do something 10 times

is unPythonic. The reason I ask is because the structure of the for loop
seems to be for iterating through a sequence. It seems somewhat
artificial to use the for loop to do something a certain number of
times, like above.

Anyone out there refuse to use it this way, or is it just impossible to
avoid?


From loorthu at yahoo.com  Mon May 19 20:08:53 2008
From: loorthu at yahoo.com (loorthu)
Date: Mon, 19 May 2008 17:08:53 -0700 (PDT)
Subject: killing children spawned by pexpect
Message-ID: <3129645d-e6cb-4ed7-82ca-2995bccbc5b7@v26g2000prm.googlegroups.com>

I am noticing that pexpect kills any child that it is spawned when the
parent is terminated using SIGINT (e.g Ctrl-C on the shell), but not
when it is killed by SIGKILL (e.g 'kill -9' on the parent process).
Here is a quick demo (tried on Linux 2.6.9 kernel):

#!/usr/local/bin/python


import pexpect, re


cmd = ?<any  time consuming shell command here>?


child = pexpect.spawn(cmd)

cpl = child.compile_pattern_list([pexpect.EOF, re.compile("(.*?)\r
\n")])

while True:

    r = child.expect_list(cpl)

    if r == 0: break

    line = child.match.group(1)

    print line

child.close()

print 'Exit ',  child.exitstatus



Now, if I kill the python process using Ctrl-C (SIGINT), it kills the
child process spawned as well. But if it is killed by SIGKILL (by
doing a ?kill -9?), the parent python exits, but the child goes on?
What is the best way to ensure that all children are killed when the
parent who spawned them terminates?



Thanks,

Cottalango



From cmpython at gmail.com  Mon May 12 18:30:15 2008
From: cmpython at gmail.com (CM)
Date: Mon, 12 May 2008 15:30:15 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <42b97720-4c9f-4060-8b28-f9cb33737f3e@m36g2000hse.googlegroups.com>

On May 12, 1:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
> Python" each night. Does anyone see any value in learning Python when you
> don't need to for school, work, or any other reason? I mean, sure, there's
> value in learning anything at any time, but for something like a programming
> language, I can't help but feel that I will be mostly unable to use what I
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense!

I think learning something only for the sake of learning is valid only
if it is really fun for you to learn that topic.  That is, it is a
hobby that brings you enjoyment.  If it is like pulling teeth and you
know you are barely ever going to use it, of course stop trying to
learn Python.  Life is too short.  Go outside.

But I think there is a huge difference between learning Python if you
know nothing about computer programming and if you already know
another language (or more).  I'd say in the first case, don't put
yourself through the trouble of learning a computer language if you
know you don't like it or won't use it--it's after all just an
arbitrary language for talking to a machine.  But if you are already
programming in another language, learning Python is probably
recommendable from the point of view of career or just understanding
programming better.

Most importantly, rarely are any cases so clear-cut as I've described
them.  Usually something is partially fun, partially a pain, partially
useful, etc.  So, it's your call.


From matt.trevor at gmail.com  Thu May 22 20:50:01 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:50:01 -0700 (PDT)
Subject: serach file for regexp, return if found?
References: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>
Message-ID: <2f9ed611-fbbc-49cb-82ed-8b09ab01bb75@t12g2000prg.googlegroups.com>

On May 23, 9:10 am, notnorweg... at yahoo.se wrote:
> but search and match only returns matchobjects(what are those anyway?
> i dont get what to do with them, do they contain true/false,
> stringposition etc?)

It's all covered in the docs:

http://docs.python.org/lib/module-re.html
http://docs.python.org/lib/match-objects.html


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 03:39:17 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 09:39:17 +0200
Subject: anonymous assignment
In-Reply-To: <3T7Wj.134606$rd2.31796@pd7urf3no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de>
	<3T7Wj.134606$rd2.31796@pd7urf3no>
Message-ID: <482945a5$0$694$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
> Marc 'BlackJack' Rintsch wrote:
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing.

I'm afraid you just don't understand what Python's "variable" are. 
You're really worrying about a non-issue here. Seriously.

>>> I
>>> find this unsatisfactory...
>>
>> Get over it?
> 
> Than what's the point of wanting a better language if every time we run 
> in something that looks wrong, or something that could be done better we 
> should  just "get over it" ?
> 

No language can be everything to everyone and still retain any kind of 
consistency. And the Python's team really try to keep a good balance 
between features and consistency (and so far mostly succeed IHMO).

Now, of course, suggesting features or potential improvements *is* a 
good idea (and FWIW there's an official way to do so : PEPs). But this 
doesn't mean that each an any such proposition is a good idea by itself, 
nor that it makes any sense wrt/ Python's design, nor that it's worth 
implementing it.



From aspersieman at gmail.com  Tue May 13 06:15:55 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Tue, 13 May 2008 12:15:55 +0200
Subject: Running compiled windows service python script
Message-ID: <48296A5B.4080008@gmail.com>

Hi All

I have a windows service (attached file). I basically just calls another 
script every 60 seconds. I can install, start and stop this service as 
expected with:
    ParseMailboxService.py install | start | stop

The problem is: if I create an exe of this script (all required modules 
are included in the exe) with gui2exe (a frontend to py2exe) I can 
install the service - but not start it. The error it returns is "Error 
starting service: The service did not respond to the start or control 
request in a timely fashion."

Is there something I need to additionally include in the compiled exe? I 
have manually included the following modules:
    * servicemanager
    * win32con
    * win32evtlogutil
    * win32serviceutil

I would greatly appreciate any help.

Regards

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 


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From alperkanat at gmail.com  Mon May 19 18:02:21 2008
From: alperkanat at gmail.com (T-u-N-i-X)
Date: Mon, 19 May 2008 15:02:21 -0700 (PDT)
Subject: Serious Problem with Timezone
Message-ID: <95b65707-35d1-4ce7-9138-b89c44d8084a@w7g2000hsa.googlegroups.com>

Hey There,

I'm a django developer and working on a project right now.. Last week
I just discovered a new problem in Python.. Here's what I do..

[01:00] (tunix at penguix ~)$ date
Sal May 20 01:00:10 EEST 2008
[01:00] (tunix at penguix ~)$ python
Python 2.5.2 (r252:60911, Feb 23 2008, 21:20:32)
[GCC 4.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from datetime import datetime
>>> datetime.now()
datetime.datetime(2008, 5, 20, 1, 0, 21, 131804)
>>> import os
>>> os.environ["TZ"] = "Europe/Istanbul"
>>> datetime.now()
datetime.datetime(2008, 5, 19, 22, 0, 38, 578438)
>>>

It's 01:00 in Istanbul now and Python shows 22:00 on 19th of May if I
set the TZ environment variable.. Django sets that variable
automatically so I'm having problems with scheduled posts..

I controlled my system's BIOS time.. It was wrong before, so I just
corrected it.. I set the time to UTC on Linux.. What else can I do ?


From deets at nospam.web.de  Fri May  2 12:13:57 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 18:13:57 +0200
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
Message-ID: <680su7F2q6qo2U1@mid.uni-berlin.de>

globalrev schrieb:
> if pygame.key.get_pressed[K_a]:
>             print "Muppet"
> 
> K_a is not defined.
> 
> 
> but yes it is. why do i get this error?

No it isn't - otherwise you wouldn't get this error, wouldn't you?

What IS defined is

pygame.K_a

Or if you do

from pygame import K_a

then K_a is defined as well.

Diez


From aahz at pythoncraft.com  Tue May 20 17:14:38 2008
From: aahz at pythoncraft.com (Aahz)
Date: 20 May 2008 14:14:38 -0700
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <g0vevu$4ss$1@panix3.panix.com>

In article <g0uk74$7a4$1 at solaris.cc.vt.edu>, brad  <byte8bits at gmail.com> wrote:
>
>Run time is not important until you are asked to scale to millions
>or billions of users or computations or large data sets. I've seen
>this first hand. Getting results back the same day or sooner may be
>important. In cases such as this, I use C or C++... nothing else will
>do. Nothing else is as fast. Although I always keep a py version around
>for testing and for smaller tasks. Don't get me wrong, I love Python,
>but there are times when nothing, but pure, hard speed will do.

YouTube?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From python at bdurham.com  Tue May 20 12:33:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 20 May 2008 12:33:47 -0400
Subject: Removing Space and "-" from a string
Message-ID: <1211301227.17857.1254174051@webmail.messagingengine.com>

Shakir,

> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script

Try this:

>>> input = '8 58-2155-58'
>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>> output
'858215558'

Malcolm


From duncan.booth at invalid.invalid  Fri May  9 12:59:58 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 16:59:58 GMT
Subject: Feature suggestion: sum() ought to use a compensated
	summationalgorithm
References: <fvmdg1$1e4p$1@toralf.uib.no>
	<mailman.809.1210281025.12834.python-list@python.org>
Message-ID: <Xns9A98E2877C40Cduncanbooth@127.0.0.1>

"Terry Reedy" <tjreedy at udel.edu> wrote:

> 
> "Szabolcs Horv?t" <szhorvat at gmail.com> wrote in message 
> news:fvmdg1$1e4p$1 at toralf.uib.no...
>| Gabriel Genellina wrote:
>| >
>| > Python doesn't require __add__ to be associative, so this should
>| > not be 
> used as a general sum replacement.
>|
>| It does not _require_ this, but using an __add__ that is not
>| commutative and associative, or has side effects, would qualify as a
>| serious misuse, 
> 
> seq + seq is not commutative ;-) 
> 
And three days ago Szabolcs already posted a followup to that 
comment saying: "Sorry, I meant associative only, not commutative.".


From v.niekerk at hccnet.nl  Wed May 28 13:56:55 2008
From: v.niekerk at hccnet.nl (huub)
Date: Wed, 28 May 2008 19:56:55 +0200
Subject: while-loop?
Message-ID: <483d9ce7$0$3125$e4fe514c@dreader18.news.xs4all.nl>

Hi,

Being a newbie with Python, I'm trying a short program with this:

 > <..>
> t = RoboInterface()
 > <..>
> while not t.Digital(1): # while endpoint is not reached
>  15         pass

However, it always hangs on the 'while', which I can't find in the 
tutorial at http://www.python.org/doc/. Assuming 'while' should work, 
what's wrong with the code?

Thanks.


From sjmachin at lexicon.net  Wed May 21 07:56:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 21 May 2008 11:56:56 GMT
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <mailman.1406.1211324391.12834.python-list@python.org>
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <48340df7$1@news.mel.dft.com.au>

Robert Kern wrote:
> Ethan Furman wrote:
>> Greetings,
>>
>> I'm looking at the struct module for binary packing of ints and 
>> floats.  The documentation refers to C datatypes.  It's been many 
>> years since I looked at C, but I seem to remember that the data type 
>> sizes were not fixed -- for example, an int might be two byes on one 
>> machine, and four bytes on the next.  Can any C programmers verify 
>> this?  If it is true, does that mean that struct.pack('h', 8001) might 
>> give me different results depending on the machine it's running on?
> 
> Right. I believe (but could be wrong) that "char" is defined to be one 
> byte, but that "short", "int", "long", and "long long" are defined as 
> "at least as big as the previous type".
> 
> In practice, though, on nearly every machine that Python runs on, "char" 
> is one byte, "short" is two bytes, and "int" is four bytes. "longs" and 
> "long longs" tend to vary substantially, though; never assume sizes for 
> them.
> 
> Single-precision floats are always four bytes and double-precision 
> floats are always eight bytes. "long doubles" vary; they could be twelve 
> bytes or sixteen.
> 
> If you want to deal with fixed sizes, use struct.calcsize() to test the 
> sizes of each of the integer types, assign them to width-specific 
> aliases, and always use these aliases.
> 

This is all true if you want to operate in "native" mode; however in 
"standard" mode the sizes are fixed -- otherwise there'd be no easy way 
of reading/writing the fixed-size fields in many common file formats.

As the manual says:
"""
Native size and alignment are determined using the C compiler's sizeof 
expression. This is always combined with native byte order.

Standard size and alignment are as follows: no alignment is required for 
any type (so you have to use pad bytes); short is 2 bytes; int and long 
are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and double 
are 32-bit and 64-bit IEEE floating point numbers, respectively.
"""

If, as I suspect, Ethan's purpose is be able to read/write files in a 
long-established PC file format, he will need to '<' for littleendian 
order, and an appropriate selection from bBhHiI and d will do what he needs.

HTH,
John


From gagsl-py2 at yahoo.com.ar  Tue May 13 04:29:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 05:29:24 -0300
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no> <87d4ns6nq5.fsf@benfinney.id.au>
	<CO7Wj.264439$pM4.238124@pd7urf1no>
Message-ID: <op.ua227ao8x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 00:21:06 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> Ben Finney wrote:
>
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing.
>>  No, you have one extra unused name binding. The values that you don't
>> want to use have *already* been allocated by the time the above
>> statement is executed. Name binding doesn't copy the values, it merely
>> binds a name to them. There's no "variable" in the above statement.
>>
>
> But if this happens in the main part of your script, it could take a  
> long time before this binding disapear, therefore, the gc won't be able  
> to clean that one up. In this particular case, it doesn't really matter  
> (small size), but imagine in a case where we are talking of a list of  
> list, with potentially large element in the list.

If you have some reasons to believe it's worth to release that last  
reference as soon as possible, just do it. `del _` is all you need.
(I may have used `del` to remove a local name no more than once a year...)

-- 
Gabriel Genellina



From g.d.owen at shaw.ca  Mon May 12 17:03:37 2008
From: g.d.owen at shaw.ca (Gareth Owen)
Date: Mon, 12 May 2008 15:03:37 -0600
Subject: Python-list Digest, Vol 56, Issue 204
In-Reply-To: <mailman.15010.1210625706.12833.python-list@python.org>
References: <mailman.15010.1210625706.12833.python-list@python.org>
Message-ID: <200805121503.40844.g.d.owen@shaw.ca>

On Monday 12 May 2008 14:55:06 python-list-request at python.org wrote:
> Send Python-list mailing list submissions to
> 	python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> 	python-list-request at python.org
>
> You can reach the person managing the list at
> 	python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."

If timing is critical, try using a semaphore technique.


From google at zvis.com  Tue May 13 16:26:00 2008
From: google at zvis.com (Zvi)
Date: Tue, 13 May 2008 13:26:00 -0700 (PDT)
Subject: How to parse xml with ISO-8859-1 encoding using ElementTree and 
	SimpleXMLTreeBuilder?
Message-ID: <e240695f-0ee7-49d8-a725-42e1f7862a76@p39g2000prm.googlegroups.com>

Hi All,

I got trouble parsing xml returned by web service. XML data contains
characters above 128, so ET.fromstring throws an error. Error is
thrown from python's xmllib.py file, where it detects char above 128.
I am replacing utf-8 encoding string in returned xml with
'ISO-8859-1', and then I call .encode with ISO-8859-1 param. Still I
get the parsing error, illegal character.
What's interesting is that if I define a string const and assign it
the value returned from the service request it gets parsed. I.e. the
following gets parsed ok.


TEST_EVNVELOPE2 = """<?xml version="1.0" encoding="ISO-8859-1"?>
                     <soap:Envelope xmlns:soap="http://
schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/
XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
                     <soap:Body><GetResponse xmlns="http://
tempuri.org/">
                     <GetResult>&lt;?xml version="1.0"
encoding="ISO-8859-1"?&gt;&lt;Response&gt;&lt;Entity Name="Accounts"
Current="00300571BDF91DDCA7D1320EE5C78877"&gt;&lt;Field Name="Name"
Value="Bad und WA?rmetechnik FA_hrwirt GmbH"/&gt;&lt;/Instance&gt;&lt;/
Entity&gt;&lt;/Response&gt;</GetResult></GetResponse>
                     </soap:Body></soap:Envelope>"""

CHARSET = 'ISO-8859-1'

      ET.XMLTreeBuilder = SimpleXMLTreeBuilder.TreeBuilder
      spEnv = TEST_EVNVELOPE2
      spEnv = spEnv.replace('utf-16', CHARSET)
      spEnv = spEnv.replace('utf-8', CHARSET)
      dom=ET.fromstring(spEnv.encode(CHARSET))

however when spEnv is assigned response.content directly I get parsing
error in ET.fromstring, even though TEST_EVNVELOPE2 value is just
pasted from the browser's src code, that is I just dumped
response.content to rendered html and then copied it from html src.
Why it works as a  string const and not as variable value?

So, what's the correct way to make parsing work?



From kibleur.christophe at gmail.com  Sat May 24 09:28:06 2008
From: kibleur.christophe at gmail.com (Tool69)
Date: Sat, 24 May 2008 06:28:06 -0700 (PDT)
Subject: need some help in serving static files inside a wsgi apps
Message-ID: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>

Hi,

Until now, I was running my own static site with Python, but I'm in
need of dynamism.

After reading some cgi tutorials, I saw Joe Gregorio's old article
"Why so many Python web frameworks?" about wsgi apps [http://
bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
question about it. The code he gave works like a charm (I had to make
a little change because SQLAlchemy has changed since), but how the
hell can I serve static files (css, js, images, etc.) within an wsgi
app, ie inside a '/static' directory ?!

Sorry if my question is a stupid one, but I cannot find an easy way to
do this. Each tutorial I'm reading out there does not talk about them
at all. All of my python books didn't mention wsgi either.

I know I could use web.py, web2py, Cherrypy, Django, Pylons, etc. but
I'm trying to understand basics of web dev. from their roots.

thanks in advance for any advice ,

Kib.


From ian.g.kelly at gmail.com  Mon May  5 13:38:17 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Mon, 5 May 2008 11:38:17 -0600
Subject: How to pass a multiline arg to exec('some.exe arg')?
Message-ID: <3fc761710805051038h3729b49bhf1118913f662e6e1@mail.gmail.com>

>  btw, is it necessarily to close() osql[1] in order to get res?
>  without close() the script seems is waiting for smth.
>  I'd like to get "res" in a loop:
>  write()
>  read()
>  write()
>  read()
>  ...
>  is it possible?

Yes, call flush() each time you're done writing.


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 05:52:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 11:52:16 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
Message-ID: <48314dd0$0$32138$426a34cc@news.free.fr>

Henrique Dante de Almeida a ?crit :
> On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
>> Hello.
>>
(snip)
>> However, it is usually said that Python is not a compiled but
>> interpreted programming language ?I mean, it is not like C, in that
>> sense.
>>
(snip)
>  I guess that python is not a good language for that. 
(snip)
>  My opinion: choose compiled or byte compiled languages. 

Slightly OT (ie : not talking about computation-heavy alorgithm being 
better implemented in C then wrapped in Python - this seems quite 
obvious) but just a couple facts:

1/ being interpreted or compiled (for whatever definition of these 
terms) is not a property of a language, but a property of an 
implementation of a language.

2/ actually, all known Python implementations compile to byte-code.



From drjekil77 at gmail.com  Fri May  9 09:54:26 2008
From: drjekil77 at gmail.com (drjekil)
Date: Fri, 9 May 2008 06:54:26 -0700 (PDT)
Subject: help needed!
Message-ID: <17148388.post@talk.nabble.com>


i have a script which will do a specific task for a file in a folder,now i
would like to do the same task  for the all files in that folder(25
files).how can i do that?

Thanks in advance.

-- 
View this message in context: http://www.nabble.com/help-needed%21-tp17148388p17148388.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From clyfish at gmail.com  Wed May  7 22:29:58 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Wed, 7 May 2008 19:29:58 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>
Message-ID: <8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com>

On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
wrote:
> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>
>
>
> > In cmd, I can use find like this.
>
> > C:\>netstat -an | find "445"
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
>
> > C:\>
>
> > And os.system is OK.>>> import os
> > >>> os.system('netstat -an | find "445"')
>
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
> > 0
>
> > But I don't know how to use subprocess.Popen to do this.
>
> > from subprocess import Popen, PIPE
>
> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> > print p2.stdout.read()
>
> > It doesn't work.
> > Because subprocess.Popen execute "find" like this.
>
> > C:\>find \"445\"
> > ???? - \
>
> > C:\>
>
> > It adds a '\' before each '"'.
> > How to remove the '\'?
> > Thank you.
>
> cannot help with the backslashes but try findstr instead of find

Thank you.
findstr doesn't need quotes, so it works.


From gandalf at shopzeus.com  Tue May  6 10:58:15 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 06 May 2008 16:58:15 +0200
Subject: Another MIDI question - soundfonts
In-Reply-To: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>
References: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>
Message-ID: <48207207.8@shopzeus.com>

Chuckk Hubbard wrote:
> Hello.
>
> I'm writing a microtonal sequencer, and I don't want to use MIDI per
> se, but I'd like to be able to load standard sample banks to play.
> The only standard format I'm familiar with is soundfont, and it seems
> to be the most popular; if anyone knows of others, especially for Mac,
> which I believe most of my software's users will be using, I'd love to
> know about it.
> And, does anyone know a python module that will allow me to load in
> soundfont files and make use of their info?  I'd like to be able to
> remap the pitches, of course, but using the same presets and such.
>   
I have no clue but I believe that you can find VST instruments that can 
load sound fonts. I'm almost sure that you'll find a VST sound font 
player that can be loaded as a DLL on Windows. Then you can use that DLL 
from Python for sure. ( Ugly interface. :-& )

   L



From Scott.Daniels at Acm.Org  Sat May 31 18:38:08 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 31 May 2008 15:38:08 -0700
Subject: Need Tutorial For the following lib
In-Reply-To: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>
References: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>
Message-ID: <Ca6dnV-iv7-2TNzVnZ2dnUVZ_vjinZ2d@pdx.net>

Gandalf wrote:
> Hi every one. I need comprehensive tutorial for the following
> library :
> 1. pyWinAuto
> 2. winGuiAuto

I file all my Tutorials here:
      http://www.google.com

In case you didn't notice, a few people are beginning to think you
are too lazy about doing the first steps yourself.

--Scott David Daniels
Scott.Daniels at Acm.Org


From Scott.Daniels at Acm.Org  Tue May 20 21:09:54 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 20 May 2008 18:09:54 -0700
Subject: iterate start at second row in file not first
In-Reply-To: <82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
	<82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>
Message-ID: <tt6dnfZ1Ca3P6a7VnZ2dnUVZ_hadnZ2d@pdx.net>

Mark d. wrote:
> How about:
> 
> mov = open(afile)
> line = mov.readline()
> ...(process your ':' line)
> for line in mov.readlines():
>    ...
The problem here is that you read the entire file in in the
call to readlines.

--Scott David Daniels
Scott.Daniels at Acm.Org



From castironpi at gmail.com  Thu May  8 20:12:16 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:12:16 -0700 (PDT)
Subject: Running a python code periodically
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com> 
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com> 
	<mailman.804.1210278715.12834.python-list@python.org>
Message-ID: <0da224da-895d-4d8c-a2e9-ecb5923d6a79@j22g2000hsf.googlegroups.com>

On May 8, 3:31?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Maryam Saeedi" <ma.sae... at gmail.com> wrote in message
>
> news:ee9cd3be0805080902g48e641bxbcf1d5578620defe at mail.gmail.com...
> |I was wondering if you know how can I run a python code once every five
> | minutes for a period of time either using python or some other program
> like
> | a bash script.
>
> I expect the following should work.
>
> from time import sleep
> while True: #or
> # for i in range(nunber_of_cycles):
> ? do_whatever()
> ? sleep(600)
>
> assuming do_whatever() is quick and you do not need exactly 5 minute
> intervals.
>
> | I have asked this question before and some of you answered me but I still
> | have problem. Most of the answers was to use cron and crontab which works
> on
> | my computer but not if I want to do it on department's computer since I
> do
> | not have permission to change those files. Is there any other way which
> does
> | not need administrator permission?

I'm on Windows, but it's fine.

I've written a driver for in-time hooks with the Keyboard and Mouse
before, just not in Python.  If MinGW can color it, it'll show up on
the newsgroup.  From preliminary evaluations of the number of
dimensions of human perception (including basis vectra), you could
pass colors in time: colors harmonize in more dimensions than sound
does; you couldn't do the same thing with sound, necessarily, unless
you seat at a bar.


From sipickles at googlemail.com  Fri May  2 15:13:41 2008
From: sipickles at googlemail.com (Simon Pickles)
Date: Fri, 02 May 2008 20:13:41 +0100
Subject: Writing elapsed time as a string
Message-ID: <481B67E5.7040507@googlemail.com>

Hello.

I'm sorry if this has been asked a thousand (million) times.

Is there a nifty pythonesque way to produce a string representing an 
elapsed time period, in terms of years, months, days, hours, mins, seconds?

I am storing times in a MySQL db, and would love to be able to write the 
time elapsed between accesses of certain data. These are in seconds 
since the epoch, as produced by time.time()

It is probable right in front of me in the docs but I am spinning off 
into outer space (mentally!)

Thanks for the temporary loan of your clarity and experience.

Simon
-- 

http://www.squirtual-reality.com
--------------------------------
Linux user #458601 - http://counter.li.org.


From alex.m.gusarov at gmail.com  Thu May 29 03:41:39 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:41:39 +0700
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
	<e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
Message-ID: <ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>

>
> Yes. That is the somewhat unfortunate difference between new-style and
> old-style classes. Use new-style if you can, and that means that "object"
> must be part of the inheritance graph.
>
...

> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov
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From sjmachin at lexicon.net  Mon May 12 19:26:44 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 12 May 2008 23:26:44 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <mailman.1003.1210630330.12834.python-list@python.org>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>	<op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<mailman.1003.1210630330.12834.python-list@python.org>
Message-ID: <4828d232@news.mel.dft.com.au>

Terry Reedy wrote:
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
> news:op.ua04evz4x6zn5v at a98gizw.cpe.telecentro.net.ar...
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> 
> escribi?:
> 
> | (We used this question last year - some people gave a sensible answer
> | in less | than 5 minutes, but others did not even know how to start)
> 
> Another approach  I do not remember seeing here (under 10 minutes)
> 
> fb = ('FizzBuzz', None, None, 'Fizz', None, 'Buzz', 'Fizz',
>       None, None, 'Fizz', 'Buzz', None, 'Fizz', None, None)
> for i in range(1,101): print(fb[i%15] or i) #3.0

"#3.0" is rather cryptic. AFAIK that will work with *any* version of 
Python up to 3.0. The "() after "print" are required in 3.0 and optional 
in earlier versions.



From arnodel at googlemail.com  Tue May  6 16:35:24 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 21:35:24 +0100
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <m2ve1r5fxv.fsf@googlemail.com>

Anton Slesarev <slesarev.anton at gmail.com> writes:

> f = open("bigfile",'r')
>
> flines = (line for line in f if pat.search(line))
> c=0
> for x in flines:
>     c+=1
> print c

It would be simpler (and probably faster) not to use a generator expression:

search = re.compile('sometext').search

c = 0
for line in open('bigfile'):
    if search(line):
         c += 1

Perhaps faster (because the number of name lookups is reduced), using
itertools.ifilter:

from itertools import ifilter

c = 0
for line in ifilter(search, 'bigfile'):
    c += 1


If 'sometext' is just text (no regexp wildcards) then even simpler:

...
for line in ...:
    if 'sometext' in line:
         c += 1

I don't believe you'll easily beat grep + wc using Python though.

Perhaps faster?

sum(bool(search(line)) for line in open('bigfile'))
sum(1 for line in ifilter(search, open('bigfile')))

...etc...

All this is untested!
-- 
Arnaud


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 05:54:42 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 11:54:42 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <mailman.1370.1211243204.12834.python-list@python.org>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>	<mailman.1361.1211228890.12834.python-list@python.org>	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<mailman.1370.1211243204.12834.python-list@python.org>
Message-ID: <48329fdc$0$24562$426a74cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Mon, 19 May 2008 17:58:48 -0300, bruno.desthuilliers at gmail.com 
> <bruno.desthuilliers at gmail.com> escribi?:
> 
>> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
>> (snip)
>>> The main
>>> concept here: identity [usually] implies equality,
>>
>> I really enjoyed the "usually" disclaimer !-)
> 
> In some *rare* cases, identity does not imply equality:

Yeps. That's exactly why I enjoyed this disclaimer...

(snip nan example).


From fiacre.patrick at gmail.com  Fri May 23 01:39:31 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:39:31 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
Message-ID: <48365893$0$11617$607ed4bc@cv.net>

Mensanator wrote:
> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>
>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
> 
> If you actually need that many digits, use a different library.
> 
>>>> import gmpy
> 
>>>> print gmpy.pi(64) # 64 bit precision
> 3.14159265358979323846
>>>> print gmpy.pi(128) # 128 bit precision
> 3.141592653589793238462643383279502884197
>>>> print gmpy.pi(16384) # 16384 bit precision
> 3.14159265358979323846264338327950288419716939937510582097494459
> 23....

Heh!


I wonder who needs that many digits?


Certainly not number theorists (they need a LOT more). Certainly not 
physicists -- they need about 30 digits to be within 1% of any 
measurement from molecules to galaxies.  Certainly not engineers, they 
need half the digits that physicists need.  Cryptographers are making a 
dire mistake if they are using PI in any computations (possible 
exception for elliptic curves -- see number theorists, above) ... so -- 
other than PI-philes, who needs PI to thousands of digits?


From kay.schluehr at gmx.net  Tue May 27 12:56:57 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 27 May 2008 09:56:57 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <b9f868c6-148c-43e6-8291-ae0fab792d9d@f63g2000hsf.googlegroups.com>

On 27 Mai, 17:21, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker

Not sure what you are talking about? Do you mean that Python 2.X shall
be advanced independently instead of being some legacy branch while
Python 3.X is the proposed future of all Python?


From rpw3 at rpw3.org  Fri May  9 23:45:26 2008
From: rpw3 at rpw3.org (Rob Warnock)
Date: Fri, 09 May 2008 22:45:26 -0500
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
Message-ID: <cMidnY3lU-7Lh7jVnZ2dnUVZ_qqgnZ2d@speakeasy.net>

George Neuner <gneuner2/@/comcast.net> wrote:
+---------------
| Common Lisp doesn't have "filter".
+---------------

Of course it does! It just spells it REMOVE-IF-NOT!!  ;-}  ;-}

    > (remove-if-not #'oddp (iota 10))

    (1 3 5 7 9)
    > (remove-if-not (lambda (x) (> x 4)) (iota 10))

    (5 6 7 8 9)
    > 


-Rob

-----
Rob Warnock			<rpw3 at rpw3.org>
627 26th Avenue			<URL:http://rpw3.org/>
San Mateo, CA 94403		(650)572-2607



From bruno.desthuilliers at gmail.com  Mon May 12 12:57:34 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 12 May 2008 09:57:34 -0700 (PDT)
Subject: In metaclass, when to use __new__ vs. __init__?
References: <slrng2gqvd.h3o.matt@sprout.tplus1.com>
Message-ID: <baa39c55-a59e-4d1a-ae21-d26881810dd6@r66g2000hsg.googlegroups.com>

On 12 mai, 18:10, Matthew Wilson <m... at tplus1.com> wrote:
> I have been experimenting with metaclasses lately.  It seems possible to
> define a metaclass by either subclassing type and then either redefining
> __init__ or __new__.
>
> Here's the signature for __init__:
>
>     def __init__(cls, name, bases, d):
>
> and here's __new__:
>
>     def __new__(meta, classname, bases, d):
>
> Every metaclass I have found monkeys with d, which is available in both
> methods.  So when is it better to use one vs the other?

Well... The __new__ method is responsible for creating and returning a
new  instance (so in this case, a new class), which is then passed to
the __init__ method. So which one you want to use depends on what you
want to do. If you only want to add some attributes/methods, register
either the class or some of it's methods somewhere etc, then __init__
is fine. If you have to transform / replace / whatever some of the
(not yet) attributes, fiddle with the inheritance tree, cache the
class object or such things, you'd better do it in __new__.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 03:10:40 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 09:10:40 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1f40f$2avo$1@news.mtu.ru>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>	<g1em6f$916$02$1@news.t-online.com>
	<g1eo0a$27k1$1@news.mtu.ru>	<g1es85$r7u$03$1@news.t-online.com>
	<g1f11p$2a08$1@news.mtu.ru>	<g1f2v2$129$01$1@news.t-online.com>
	<g1f40f$2avo$1@news.mtu.ru>
Message-ID: <483bb3e9$0$5100$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:
> 
>> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
>>
>>> If the OP wants PHP-style programming he will get better results with
>>> PHP because PHP was designed this way. Any Pythonic solution will be an
>>> overkill.
>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>> committing suicide by shooting yourself into the head with PHP ...
> 
> :) I can't imagine anything uglier than Python with its significant 
> whitespace wrapped inside HTML. I guess it could be more damaging than 
> PHP which was written exactly for this purpose.

Mako template's syntax looks not so ugly to me:

<%inherit file="base.html"/>
<% rows = [[v for v in range(0,10)] for row in range(0,10)] %>
<table>
     % for row in rows:
         ${makerow(row)}
     % endfor
</table>

<%def name="makerow(row)">
     <tr>
     % for name in row:
         <td>${name}</td>\
     % endfor
     </tr>
</%def>


From stanc at al.com.au  Fri May  2 05:19:07 2008
From: stanc at al.com.au (Astan Chee)
Date: Fri, 02 May 2008 19:19:07 +1000
Subject: get number that is raised to the power of
Message-ID: <481ADC8B.20000@al.com.au>

Hi,
Im not sure if this is more of a math question or a python question. I 
have a variable in python:
 >>> v = 10.0**n
is there a way to find the value of n if i know only v aside from 
str(v).split('+')[1] ? that seems like too much of a hack and I was 
wondering if there was a faster way of doing it?
Thanks for any pointers
Astan

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From python at rgbaz.eu  Fri May  2 05:33:59 2008
From: python at rgbaz.eu (Python.Arno)
Date: Fri, 2 May 2008 11:33:59 +0200
Subject: get number that is raised to the power of
In-Reply-To: <481ADC8B.20000@al.com.au>
References: <481ADC8B.20000@al.com.au>
Message-ID: <97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>


On 2 mei 2008, at 11:19, Astan Chee wrote:

> Hi,
> Im not sure if this is more of a math question or a python question.  
> I have a variable in python:
> >>> v = 10.0**n
> is there a way to find the value of n if i know only v aside from  
> str(v).split('+')[1] ? that seems like too much of a hack and I was  
> wondering if there was a faster way of doing it?
> Thanks for any pointers
> Astan
>

>

the "reverse" of a power to is logarithm
so v = 10**n  <=>  math.log(v,10) = n

Arno


From kris at FreeBSD.org  Thu May 29 18:17:05 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Fri, 30 May 2008 00:17:05 +0200
Subject: mmap class has slow "in" operator 
Message-ID: <483F2B61.6050306@FreeBSD.org>

If I do the following:

def mmap_search(f, string):
	fh = file(f)
	mm = mmap.mmap(fh.fileno(), 0, mmap.MAP_SHARED, mmap.PROT_READ)

	return mm.find(string)

def mmap_is_in(f, string):
	fh = file(f)
	mm = mmap.mmap(fh.fileno(), 0, mmap.MAP_SHARED, mmap.PROT_READ)

	return string in mm

then a sample mmap_search() call on a 50MB file takes 0.18 seconds, but 
the mmap_is_in() call takes 6.6 seconds.  Is the mmap class missing an 
operator and falling back to a slow default implementation?  Presumably 
I can implement the latter in terms of the former.

Kris


From slesarev.anton at gmail.com  Wed May  7 17:11:48 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Wed, 7 May 2008 14:11:48 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.708.1210173789.12834.python-list@python.org>
Message-ID: <3a44bead-6995-486a-886d-7d3a57766b62@m73g2000hsh.googlegroups.com>

On May 7, 7:22 pm, Pop User <popu... at christest2.dc.k12us.com> wrote:
> Anton Slesarev wrote:
>
> > But I have some problem with writing performance grep analog.
>
> I don't think you can ever catch grep.  Searching is its only purpose in
> life and its very good at it.  You may be able to come closer, this
> thread relates.
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> This relates to the speed of re.  If you don't need regex don't use re.
>   If you do need re an alternate re library might be useful but you
> aren't going to catch grep.

In my last test I dont use re. As I understand the main problem in
reading file.


From straton at lampsacos.demon.co.uk  Sun May 18 08:05:32 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 13:05:32 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
Message-ID: <g0p62e$mpb$1$8300dec7@news.demon.co.uk>

Oops. I meant:

WhiteArea=Result.histogram()[255]

of course, not

WhiteArea=Result.histogram()[0]

Ken Starks wrote:
> As others have said, PIL has the 'histogram' method to do most of the 
> work. However, as histogram works on each band separately, you have
> a bit of preliminary programming first to combine them.
> 
> The ImageChops darker method is one easy-to-understand way (done twice),
> but there are lots of alternatives, I am sure.
> 
> 
> # ------------------------------------
> 
> import Image
> import ImageChops
> 
> Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> R,G,B = Im.split()
> 
> Result=ImageChops.darker(R,G)
> Result=ImageChops.darker(Result,B)
> 

#### Mistake here:

> WhiteArea=Result.histogram()[0]

> TotalArea=Im.size[0] * Im.size[1]
> PercentageWhite = (WhiteArea * 100.0)/TotalArea
> 
> 
> 
> 
> 
> Poppy wrote:
>> I've put together some code to demonstrate what my goal is though 
>> looping pixel by pixel it's rather slow.
>>
>> import Image
>>
>> def check_whitespace():
>>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
>>
>>     size = im.size
>>
>>     i = 0
>>     whitePixCount = 0
>>     while i in range(size[1]):
>>         j = 0
>>         while j in range(size[0]):
>>             p1 = im.getpixel((j,i))
>>             if p1 == (255, 255, 255):
>>                 whitePixCount = whitePixCount + 1
>>                 if whitePixCount >= 492804:  ## ((image dimensions 
>> 1404 x 1404) / 4) 25%
>>                     return "image no good"
>>             j = j + 1
>>         i = i + 1
>>
>>     print whitePixCount
>>
>>     return "image is good"
>>
>> print check_whitespace()
>>
>>
>> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>> I need to write a program to examine images (JPG) and determine how 
>>> much area is whitespace. We need to throw a returned image out if too 
>>> much of it is whitespace from the dataset we're working with. I've 
>>> been examining the Python Image Library and can not determine if it 
>>> offers the needed functionality. Does anyone have suggestions of 
>>> other image libraries I should be looking at it, or if PIL can do 
>>> what I need?
>>>
>>
>>


From afilash+python at gmail.com  Fri May 30 08:44:30 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Fri, 30 May 2008 18:14:30 +0530
Subject: how can i stop script from running on login ?
Message-ID: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>

Hi all,

One of my friends played some tricky thing, and now I am in great trouble,
please help
Here is the scenario  [windows xp ]:

He wrote one login script and put it on the start program folder under 'All
Users'
The script is like this it will issue a log off command when we login; due
to this I am not able to login to my system even he himself not able to
access the system and solve the problem. The main thing is the script is of
'.pyw' type so I can't able to close the CMD window to stop this script

How can I remove that script? Any help will be appreciated, thanks in
advance

Abhilash
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From deets at nospam.web.de  Wed May 21 17:16:53 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 23:16:53 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <69jhqnF324rmkU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
> 
>> My understand is no, not if you're using IEEE floating point.
> 
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

Who says that rounding on base 10 is more correct than rounding on base 2?

And in scientific programming, speed matters - which is why e.g. the 
cell-processor shall grow a double-precision float ALU. And generally 
supercomputers use floats, not arbitrary precision BCD or even rationals.


Diez


From iainking at gmail.com  Tue May 13 09:43:13 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 06:43:13 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>
Message-ID: <46508224-d4c6-4982-a29f-04d29b3d5a2c@m36g2000hse.googlegroups.com>

On May 13, 2:20 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Iain King wrote:
> > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > up a file selector.  This all works fine, but the first thing the user
> > has to do when they open the dialog is select a file, so I would like
> > the dialog to automatically call the onBrowse function as soon as the
> > dialog opens.  However, I don't know how to do this.
>
> > dlg.ShowModal()
> > onBrowse()
>
> > obviously doesn't work, and neither does the reverse.  I was hoping
> > that the dialog would throw some kind of "I have been shown" event,
> > but it doesn't (as far as I can tell).  How do I make the dialog do
> > something as soon as it's been shown?
>
> > Iain
>
> If the only things on your modal dialog are Browse and cancel, just call the
> wx.FileDialog directly and eliminate the intermediate modal dialog.  If not
> don't bind the FileDialog to a button, just create an instance of it as the last
>   you do in the __init__ method of the modal dialog code.
>
> If this doesn't help, you will have better luck posting to wxpython newsgroup.
>
> -Larry

The dialog doesn't only let you call the file dialog, it does other
stuff too.  Your suggestion of __init__ sounded promising, but neither
giving the dialog an __init__() method nor an OnInit() method worked.
Thanks anyway.

Iain


From geonomica at gmail.com  Thu May 15 20:32:50 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 15 May 2008 17:32:50 -0700 (PDT)
Subject: rough set & python
Message-ID: <f9e642ee-6454-4acf-99d8-2846668f6b50@d45g2000hsc.googlegroups.com>

I've just wrapped the rough set library from C to python. Could
anybody help me to test it and debug?

thanks

Gianluca


From nicolas.dandrimont at gmail.com  Sat May 10 17:15:07 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Sat, 10 May 2008 23:15:07 +0200
Subject: Python doesn't recognize quote types
In-Reply-To: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <20080510211507.GB24788@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-10 13:56:39 -0700]:

> There's a thing that bugs me in Python. Look at this...
> 
> >>> print "Testing\"
> SyntaxError: EOL while scanning single-quoted string
> 
> 
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?

The "single-quoted string" (e.g. 'foo' or "bar") is so named by 
opposition to triple-quoted (e.g.  '''foo''' or """bar""") strings.

Regards,
-- 
Nicolas Dandrimont

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From Scott.Daniels at Acm.Org  Sun May 25 15:17:10 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 12:17:10 -0700
Subject: QOTW
In-Reply-To: <mailman.1542.1211661983.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>	<mailman.1532.1211644302.12834.python-list@python.org>	<g19fv3$3vl$1@gide.ita.chalmers.se>	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<mailman.1542.1211661983.12834.python-list@python.org>
Message-ID: <KN-dnckJZ6CDJKTVnZ2dnUVZ_oDinZ2d@pdx.net>

D'Arcy J.M. Cain wrote:

> Yes!  One of the biggest advantages to unit testing is that you never
> ever deliver the same bug to the client twice.  Delivering software
> with a bug is bad but delivering it with the same bug after it was
> reported and fixed is calamitous.

QOTW for sure.

--Scott David Daniels
Scott.Daniels at Acm.Org



From bronger at physik.rwth-aachen.de  Thu May  1 01:06:52 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 07:06:52 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
Message-ID: <87skx2bok3.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

> I also have a problem with relative import; I can't for the life of me
> figure out how to use the damn thing. I think the main problem is with
> getting Python to recognize the existence of a package. I have
>
> S/
>   p.py
>   B/
>     b.py
>   W/
>     pyw/
>       u.py
>       ws.py
>
> and I'd like to get u.py to import all the other 3 programs. I put
> empty __init__.py files in all of the above directories (is this
> necessary?), and even manually added the pathway (r'C:\Myname\S') to
> sys.path, but when I execute
>
> from S import p
>
> in u.py Python gives "ImportError: No module named S".

I didn't look it up myself, but maybe a __init__.py file is missing
so that it can be recognised as a package.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From martin at v.loewis.de  Thu May  1 10:30:34 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 16:30:34 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
Message-ID: <4819D40A.1000205@v.loewis.de>


> lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> referenced symbol not found

You need to link _psycopg.so with the math library, -lm.

Regards,
Martin


From deets at nospam.web.de  Fri May  2 10:45:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 16:45:56 +0200
Subject: creating a list from a inconsistent text file
In-Reply-To: <ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <680np7F2qssisU1@mid.uni-berlin.de>

Jetus schrieb:
> On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
>>> I have a comma delimited file that is separated by comma's, and then
>>> sometimes by ","
>>> c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
>>> 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
>>> c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
>>> 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
>>> c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
>>> 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>> The items are always delimited by commas but some items themselves contain
>> a comma and therefore are enclosed in double quotes.  So it's not
>> inconsistent.
>>
>>> How do I convert that line into a list?
>> Use the `csv` module in the standard library.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

As Marc said: use the CSV-module. It will ignore the comma inside 
""-surrounded fields. Then, once you extracted the columns, you might 
consider using the split-method on the columns to process further.

Diez


From s0suk3 at gmail.com  Thu May 15 17:13:51 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 15 May 2008 14:13:51 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com> 
	<6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com> 
	<de23bd7f-75fb-4cfb-bbc0-14dc469ef6ce@k37g2000hsf.googlegroups.com>
Message-ID: <ce00d345-d063-4bc2-9f76-988024be5f99@s50g2000hsb.googlegroups.com>

On May 15, 12:07 pm, globalrev <skanem... at yahoo.se> wrote:
> On 15 Maj, 19:04, globalrev <skanem... at yahoo.se> wrote:
>
> > when i try to write to the file...
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
> > <module>
> >     d.write('hej du galne kock')
> > IOError: [Errno 0] Error
>
> damn i take a break lol.
>
> r+ ldo when open file so i CAN write to it...

That traceback doesn't provide much help ("[Errno 0] Error"...), but I
remember that one time I got it when trying to write to a file opened
for reading. Make sure you're opening the file for writing (passing
"w" as the second argument to open(), or "wb" if you're writing binary
data). Also, as everyone keeps pointing out to you, watch out for
backslash scapes -- double the slashes ("\\", that really means a
single \ to Python), use forward slashes ("/", perhaps not the most
elegant solution, but it always works), or put an "r" next to the
string (r"your\path"). The last form is the easiest, but it only works
if you're typing a literal; you'll eventually need to double slashes
(e.g., for replacing something in a string: s.replace("/", "\\")).



From ivan.illarionov at gmail.com  Wed May  7 19:46:33 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 23:46:33 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
Message-ID: <fvtf0p$6pj$1@news.mtu.ru>

On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:

> Is there a way to do:
> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> x[0,2:6]
> 
> That would return:
> [0, 3, 4, 5, 6]

IMHO this notation is confusing.

What's wrong with:
[0]+x[2:6] 
 
> I am surprised this notation is not supported, it seems intuitive. A
> concrete example of the sort of thing I want to do:
> 
> p = file('/etc/passwd').readlines()
> q = [ e.strip().split(':')[0,2:] for e in p ]
> 
> (getting rid of the password / x field)

This works and is clearer:
[[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]

-- 
Ivan


From zapwireDASHgroups at yahoo.com  Thu May 22 16:39:28 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 13:39:28 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
Message-ID: <6SkZj.161533$fB7.33031@en-nntp-06.dc1.easynews.com>

"Peter Otten" <__peter__ at web.de> wrote in message 
news:g14gkp$gs2$01$1 at news.t-online.com...
>> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] ...
>>>> items = [None] * 6
>>>> items[::2] = 1,2,3
>>>> items[1::2] = 4,5,6
>>>> items
> [1, 4, 2, 5, 3, 6]

Thanks Peter, that's pretty clean -- I like it!




From landofdreams at gmail.com  Thu May  1 02:17:50 2008
From: landofdreams at gmail.com (Sam)
Date: Wed, 30 Apr 2008 23:17:50 -0700 (PDT)
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org> 
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com> 
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
	<6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>
	<87abjablo5.fsf@physik.rwth-aachen.de>
Message-ID: <85ef434e-a340-400b-86d3-faa98f951b6a@b64g2000hsa.googlegroups.com>

> > I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?
>
> Try r'C:\Users\Myname'.

Excellent, it works! Thanks, Torsten.

Sam


From frankdmartinez at gmail.com  Sat May 10 20:09:02 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Sat, 10 May 2008 17:09:02 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>
Message-ID: <ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com>

Hi, Terry.
    Yeah, no.  If we think of the inherited B as an object nested
within a1, I'm attempting to initialize that B with b1 by accessing
the B, say, via a function call.  I don't see how using a python
factory achieves this.


From duncan.booth at invalid.invalid  Fri May  9 06:41:18 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 10:41:18 GMT
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <Xns9A9976D7CDC64duncanbooth@127.0.0.1>

dmitrey <dmitrey.kroshko at scipy.org> wrote:

> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
>> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>>
>> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
>> > and
>> > list2 = [0, 2, 4] # integer elements
>>
>> > howto (I mean most simple recipe, of course) form list3 that contains
>> > elements from list1 with indexes from list2, i.e.
>>
>> list3 = [list1[i] for i in list2]
>>
> 
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
> 

Did you try Paul's suggestion?

Python 2.3.5 (#1, Oct 13 2005, 09:17:23)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
>>> list2 = [0, 2, 4]
>>> list3 = [list1[i] for i in list2]
>>> list3
['elem0', 'elem2', 'elem4']



From bignose+hates-spam at benfinney.id.au  Sat May 24 09:44:21 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 23:44:21 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <87abifbyve.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> What strategies do you use to ensure correctness of new code?

Behaviour Driven Development <URL:http://behaviour-driven.org/>.

* Start with an automated unit test suite that passes.

* Describe, as formally or informally as you like, but *not* in code,
  the new or altered behaviour that the code should exhibit.

* Assert some simple aspect of that behaviour in an automated unit
  test that asserts one single true/false statement.

  This forces you to be absolutely specific about the new behaviour
  you're about to implement, at exactly the point where you need that
  specification.

  It also forces you to think about the code from the perspective of
  an external user of the code, *before* implementing it. This leads
  over time to much better-designed APIs, without large up-front
  planning.

* Run the entire unit test suite; watch the new test fail with an
  explanation of why it failed.

  At this point you know your unit test suite will fail, with a good
  explanatory message, in any future failure of the code to implement
  the specified behaviour.

* Alter the application in the simplest possible way to make the
  entire unit test suite pass. Don't be clever, don't optimise
  anything (yet); be lazy. Do the simplest thing that could possibly
  work.

  This ensures you don't have any code that isn't necessary to
  implement your specified requirements. Since you designed an
  implemented a test that will use this code first, you should have a
  much better idea of the simplest code that will satisfy it, and
  won't have to go down so many wasteful dead-ends.

* Run the entire unit test suite. Fix any failing tests.

  The existing tests in the unit test suite will show any regressions
  you introduced. You might need to re-evaluate the relevance of old
  tests as you specify and implement new behaviour.

* Only once the entire unit test suite passes again, refactor any code
  that now exhibits redundancies or inelegancies.

  This doesn't permit you to change behaviour or API; "refactor" means
  changing the structure of the code without changing its behaviour.

* Run the entire unit test suite. Fix any failing tests.

  You have now designed, specified, implemented, and tested the new
  behaviour. Check your code into your VCS with an appropriate message
  saying what you implemented and why.

* Repeat from the top.

> Specifically, if you've just written 100 new lines of Python code,
> then:
> 
> 1) How do you test the new code?

Write the tests first, and make sure you aren't writing so much new
code between tests.

> 2) How do you ensure that the code will work correctly in the future?

Always run your complete automated unit test suite between changes to
the code. If possible, arrange for the unit test suite to be run
automatically every time you change your working copy of the code
and/or tests. That way you only have to look at the output when you
want to know what effect you just had on the pass/fail status.

Treat any bug as "desired change to the behaviour of the code", and
begin by implementing a new unit test that fails because of the bug.
Then your unit test suite will catch any regression of the bug.

-- 
 \         ?In case you haven't noticed, [the USA] are now almost as |
  `\         feared and hated all over the world as the Nazis were.? |
_o__)                                           ?Kurt Vonnegut, 2004 |
Ben Finney


From daveparker at flamingthunder.com  Mon May 19 23:27:56 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:27:56 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<SYWdnYoHYaFzT7TVnZ2dnUVZ_sHinZ2d@posted.visi>
Message-ID: <355dfd10-4ee1-4171-9655-24a8dfe25e9c@k1g2000prb.googlegroups.com>

On May 13, 11:42?am, Grant Edwards <gra... at visi.com> wrote:
> Well, python will definitely never have a name that sounds like
> a slang term for happens after you get food poisioning at a
> Thai restaurant...

:)


From tjreedy at udel.edu  Tue May 20 13:43:15 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 13:43:15 -0400
Subject: subprocess - please enhance the documentation
References: <69fmseF329s6vU1@mid.dfncis.de>
Message-ID: <g0v2jh$fk4$1@ger.gmane.org>


"Helmut Jarausch" <jarausch at igpm.rwth-aachen.de> wrote in message 
news:69fmseF329s6vU1 at mid.dfncis.de...
| Hi,
|
| I'd like to suggest to add a few lines to chapter 17.1.3.5 "Replacing 
os.popen"
| (Python Doc 2.5.2)

1. Take a look at the existing 2.6 manual (on Python.org) to make sure it 
has not already been improved.  If not..

2. Post your suggestions on bugs.python.org and mark the item as 
documentation and stdlib.  Suggest the specific addition or change you 
would like to see.  If accepted, one of the doc-masters with add it with 
the needed formatting code and possibly stylistic changes.

| I have used the following code in the past
|
| ARC='MyDumpFile'
| tar_inp= os.popen('/bin/tar cjf '+ARC+' -T -','w')
| ....
| tar_exit_code= tar_inp.close()
| if  tar_exit_code != None and tar_exit_code % 256 :
|   print "some error messages"
|
| When replacing this - as suggested - by
|
| TAR= Popen(('/bin/tar','cjf',ARC,'-T','-'),stdin=PIPE)
| tar_inp= TAR.stdin
| ....
| tar_inp.close() always returns None.
|
| So I have replaced this by
|
| tar_inp.close()
| tar_exit_code= TAR.wait()
|
| if  tar_exit_code != 0 :
|   print "some error messages"
|
|
| Perhaps a few lines telling about this would be helpful.
|
| Thanks,
| Helmut.
|
| -- 
| Helmut Jarausch
|
| Lehrstuhl fuer Numerische Mathematik
| RWTH - Aachen University
| D 52056 Aachen, Germany
| --
| http://mail.python.org/mailman/listinfo/python-list
| 





From brian.darkblueb at gmail.com  Sat May  3 18:25:35 2008
From: brian.darkblueb at gmail.com (darkblueB)
Date: Sat, 3 May 2008 15:25:35 -0700 (PDT)
Subject: PIL JPEG mis-step
Message-ID: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>

I got the Python Imaging Library from source, built and installed, on
Ubuntu 7.10, not realizing I could run a self-test first. libjpeg is
on the machine, but was not detected.. so no JPG encoder. I got the
dev-libjpg and rebuilt PIL. The self-test now shows JPG support.

but running setup.py install again seems to succeed, but still no
JPG :-(

fix ideas appreciated




From nick at craig-wood.com  Thu May  1 09:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 01 May 2008 08:30:03 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <slrng1jh5a.548.nick@irishsea.home.craig-wood.com>

Lance Gamet <lance at gamet.com> wrote:
>  This project will store most of its actual data in a shared-database, but 
>  I have a small amount of user specific data that I need to be stored like 
>  configuration or preferences for example, the list of databases that the 
>  program should connect to.
> 
>  On Unix this might be a .file, on windows this could be in the registry, 
>  or an ini file or an xml file in ProgramData or AppData or something.
> 
>  Is there a pythony way to store such config data, perhaps there is 
>  already a standard python package for such a purpose?

I've found

  http://docs.python.org/lib/module-ConfigParser.html

To be easy to use and built in.  It makes human readable / editable
.ini - like files.

As for where to store it, I use os.path.expanduser("~") to find the
base directory and a bit of platform specific code.

Something like this snippet

    self.is_windows = sys.platform == 'win32'
    self.home = os.path.expanduser("~")
    if self.is_windows:
        self.config_dir = os.path.join(self.home, "Application Data", self.NAME)
    else:
        self.config_dir = os.path.join(self.home, "."+self.NAME)
    if not os.path.isdir(self.config_dir):
        os.makedirs(self.config_dir, mode=0700)
    self.config_file = os.path.join(self.config_dir, "config")

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kyosohma at gmail.com  Fri May  2 15:36:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 12:36:16 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <2b967e8a-1331-42d7-8059-8c0aac248623@c65g2000hsa.googlegroups.com>

On May 2, 2:15 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> I'm not sure if this is a question about python programming, system
> administration or sockets in general...
> I have the FTP server in my signature to which I'd want to add IPv6
> support.
> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?
>
> Thanks in advance.
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib

Quote: "The individual computer systems must be upgraded to support
IPv6 (for example, on Windows XP and Server 2003 systems, IPv6 must be
installed as a Network Component via the Network Connections
Properties dialog box) and your routers must be upgraded to support
IPv6 protocols along with IPv4."

See http://articles.techrepublic.com.com/5100-10878_11-5727015.html

Python's socket module also talks about IPv6 calls here:
http://docs.python.org/lib/module-socket.html

I've never messed with this, so good luck!

Mike


From spamgrinder.trylater at ggmail.com  Fri May  2 22:59:27 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Fri, 02 May 2008 21:59:27 -0500
Subject: is +=1 thread safe
In-Reply-To: <Xns9A91A511BFF4duncanbooth@127.0.0.1>
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
Message-ID: <481BD50F.5080608@ggmail.com>

Duncan Booth wrote:
[...]
> 
> is equivalent to:
> 
>       x = x.__iadd__(1)

thx all for answers and hints ...

> 
> Generating hundreds of threads is, BTW, a very good way to get poor 
> performance on any system. Don't do that. Create a few threads and put the 
> actions for those threads into a Queue. If you want the threads to execute 
> in parallel investigate using sub-processes.


I know that limitation. However I am bridging to existing software which 
is hard to be changed. and on powerful machine I have at hand it works 
quite fast.

> 
> The threading module already has a function to return the number of Thread 
> objects currently alive.

I have threads within threads - so it does not suit me :-(.

-- 
Andy


From ptmcg at austin.rr.com  Sat May 10 00:04:16 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 9 May 2008 21:04:16 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com> 
	<4824e3ce$1@news.mel.dft.com.au>
Message-ID: <dd1677bb-de7b-477e-8b63-bf79dc726469@t54g2000hsg.googlegroups.com>

On May 9, 6:52?pm, John Machin <sjmac... at lexicon.net> wrote:
> Paul McGuire wrote:
> > from re import *
>
> Perhaps you intended "import re".

Indeed I did.

> <snip>
>
> > Both print "prince".
>
> No they don't. The result is "NameError: name 're' is not defined".

Dang, now how did that work in my script?  I assure you I did test it
before posting.

Ah!  My pyparsing prototype preceded the regex version in the same
script, and importing the pyparsing module imports re using "import
re".  That is why I didn't get NameError.  Sorry for sloppy posting...

Once you clean up the mistakes, you essentially get the same code as
earlier posted by Matimus.

-- Paul


From deets at nospam.web.de  Tue May  6 06:22:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:22:38 +0200
Subject: Confusion regarding the readline module
References: <8c46be09-35bf-429f-b3c7-5c68abbd548b@f24g2000prh.googlegroups.com>
Message-ID: <68aps9F2r9b93U3@mid.uni-berlin.de>

Siddhant wrote:

> Hi!
> I am having some doubts related to the readline module. I hope someone
> could clear them.
> 1. What exactly does the readline.get_line_buffer() function do? Does
> it return whatever is the current input by the user? If yes, then can
> I use it to check the current inputs of the user and base the next-
> word completion against whatever the user has entered so far? There
> wasn't much documentation on it, and a lot of googling couldn't help
> much. :(
> 2. Related to the completer function, what is meant by returning the
> "state"th completion for "text"? Is the completer function called
> everytime (for all possible values of "state") when I press the Tab
> key? When/How is it called?
> 
> Basically, I need to define a completer function, that should take
> into consideration whatever the user has entered so far, and complete
> the next word accordingly. The same way as a "cd /some/file" is
> meaningless.

I don't know anything about readline (beyond it's existence of course) - but
I do know & use the rlcompleter2 module. Go download it and look into it's
source, it should give you an idea how to proceed.

Diez


From itskrithika at gmail.com  Fri May  2 14:44:09 2008
From: itskrithika at gmail.com (terry)
Date: Fri, 2 May 2008 11:44:09 -0700 (PDT)
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
	<6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>
Message-ID: <743d317e-bd06-42b1-a4fa-399ec18b548b@z24g2000prf.googlegroups.com>

On May 2, 10:26?am, terry <itskrith... at gmail.com> wrote:
> On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
>
>
>
>
>
> > On 2008-04-25, terry <itskrith... at gmail.com> wrote:
>
> > > I am trying to send a character to '/dev/ttyS0' and expect the
> > > same character and upon receipt I want to send another
> > > character. I tired withPyserialbut in vain.
>
> > Pyserialworks. ?I've been using it almost daily for many
> > years. ?Either your program is broken, your serial port is
> > broken, or the device connected to the serial port is broken.
>
> > > Test Set up:
>
> > > 1. Send '%' to serial port and make sure it reached the serial port.
> > > 2. Once confirmed, send another character.
>
> > > I tried with write and read methods inPyserialbut no luck.
>
> > > Can you help?
>
> > Ah yes, the problem is in line 89 of your program.
>
> > We've no way to help if you don't provide details. If you
> > really want help, write as small a program as possible that
> > exhibits the problem. ?I'd like to emphasize _small_. The
> > larger the program the less likely people are to look at it,
> > and the less likely they are to find the problem if they do
> > look at it.
>
> > Much of the time the exercise of writing a small demo program
> > will lead you to the answer. ?If not, then post it, along with
> > the output from the program that shows the problem.
>
> > Then we can tell you what you did wrong.
>
> > --
> > Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! I'm also against
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? BODY-SURFING!!
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?
>
> Here is the code.
>
> """Open serial connection"""
> ? ? ? ? def openSerialConnection(self,serpt):
> ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>
> ? ? ? ? ? ? except:
> ? ? ? ? ? ? ? ? self.print_u("Failed to open serial port %s. " %serpt)
>
> ? ? ? ? def enterThroughSerialPort(self,serpt):
> ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
> ? ? ? ? ? ? ?self.print_u('Sending !!!!..')
> ? ? ? ? ? ? ?while True:
> ? ? ? ? ? ? ? ? s1.write('*')
> ? ? ? ? ? ? ? ?c = s1.read(1)
> ? ? ? ? ? ? ? ?if c:
> ? ? ? ? ? ? ? ? ? self.print_u('Found "*" ')
> ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? print c
> ? ? ? ? ? ? ?s1.write('enter\r')
> ? ? ? ? ? ? ?s1.read('login')
>
> if __name__ == '__main__':
> ? ? serpt = '/dev/ttyS0'
> ? ? x.openSerialConnection(serpt)
> ? ? # funtion to reboot the device goes here ---#
> ? ? x.enterThroughSerialPort(serpt)
>
> After opening the serial connection, the device is rebooted followed
> by sending '*' to serial port and reading back the same. I seem to
> have problem while trying to read '*' back from serial port. First of
> all I am not sure if serial port received the '*'.
>
> Thanks!- Hide quoted text -
>
> - Show quoted text -

This is the err message I received:

c = s1.read(1)
File "/usr/local/lib/python2.5/site-packages/serial/serialposix.py",
line 275, in read
    ready,_,_ = select.select([self.fd],[],[], self._timeout)


From alex.m.gusarov at gmail.com  Thu May 29 03:34:58 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:34:58 +0700
Subject: Struct usages in Python
In-Reply-To: <m2bq2q48nu.fsf@googlemail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
Message-ID: <ac6dcb3d0805290034j27030b6cpa9dec03b0dbecbdd@mail.gmail.com>

>
> Yes. That is the somewhat unfortunate difference between new-style and
> old-style classes. Use new-style if you can, and that means that "object"
> must be part of the inheritance graph.
>
...

> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov
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From sjmachin at lexicon.net  Sat May 24 07:11:17 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 11:11:17 GMT
Subject: SQLite import fails sometimes ?
In-Reply-To: <mailman.1520.1211623228.12834.python-list@python.org>
References: <mailman.1520.1211623228.12834.python-list@python.org>
Message-ID: <4837f7d1$1@news.mel.dft.com.au>

Stef Mientki wrote:
> hello,
> 
> The import statement "import sqlite3" gives the error given below.
> In simple programs, the import statement (sometimes) succeed,
> and I can indeed access the database.
> So I guess there is some conflict with another part of my program,
> but as the program is rather large (and dynamic) it's not easy to 
> isolate the problem.
> Does anyone has a clue how to trace this kind of problem ?
> 
> thanks,
> Stef
> 
> Traceback (most recent call last):
>  File "bricks\brick.py", line 322, in Exec
>    self.Generate_Output_Signals ()
>  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
>    import sqlite3
>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>

Is P: a network drive? If not, what is it?
I presume from the fact that the next part of the path is not 
\Python25\Lib that you have not performed a default installation; other 
than the changes to the path name, what else have you done?
What version of Python are you using? What version of Windows?

>    from dbapi2 import *
>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>    from _sqlite3 import *
> ImportError: DLL load failed: Invalid access to memory location.

Looks like the problem could be with your copy of _sqlite3.pyd (pyd == 
Python DLL)

Try why I did below and tell us how far you got.
Cheers,
John

=== try this ===
C:\junk>python
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from _sqlite3 import *
 >>> import _sqlite3
 >>> _sqlite3.__file__
'c:\\python25\\DLLs\\_sqlite3.pyd'
=== end ===


From temmokan at gmail.com  Fri May 23 02:26:09 2008
From: temmokan at gmail.com (Sagari)
Date: Thu, 22 May 2008 23:26:09 -0700 (PDT)
Subject: Calling class method by name passed in variable
Message-ID: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>

Greetings,

Can someone suggest an efficient way of calling method whose name is
passed in a variable?

Given something like:

class X:
#...
  def a(self):
# ...

  def b(self):
# ...

#...

x = X()
#...
v = 'a'

How do I call the method of x  whose name is stored in v?

PHP code for this would be:

class X {
  function a() {
  }
}

$x = new X();
$v = 'a';
$x->$v();

I need a solution for Python. Could you suggest anything?

The task it to call a function whose name is taken from user-supplied
input.

Thanks.


From jarausch at igpm.rwth-aachen.de  Tue May 20 06:18:52 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 12:18:52 +0200
Subject: subprocess - please enhance the documentation
Message-ID: <69fmseF329s6vU1@mid.dfncis.de>

Hi,

I'd like to suggest to add a few lines to chapter 17.1.3.5 "Replacing os.popen" 
(Python Doc 2.5.2)

I have used the following code in the past

ARC='MyDumpFile'
tar_inp= os.popen('/bin/tar cjf '+ARC+' -T -','w')
....
tar_exit_code= tar_inp.close()
if  tar_exit_code != None and tar_exit_code % 256 :
   print "some error messages"

When replacing this - as suggested - by

TAR= Popen(('/bin/tar','cjf',ARC,'-T','-'),stdin=PIPE)
tar_inp= TAR.stdin
....
tar_inp.close() always returns None.

So I have replaced this by

tar_inp.close()
tar_exit_code= TAR.wait()

if  tar_exit_code != 0 :
   print "some error messages"


Perhaps a few lines telling about this would be helpful.

Thanks,
Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From inq1ltd at inqvista.com  Sun May 25 12:20:29 2008
From: inq1ltd at inqvista.com (jim-on-linux)
Date: Sun, 25 May 2008 12:20:29 -0400
Subject: finding icons for Apps
In-Reply-To: <48397ABE.2070006@codebykevin.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
	<48397ABE.2070006@codebykevin.com>
Message-ID: <200805251220.29847.inq1ltd@inqvista.com>


Learn how to use Gimp, 

Make your own icons, of and from anything. 
You can use screen shots and picks from 
anywhere. Import your own photos and modify 
any pic however you want. Check them out, 
free download, tutorial. 

http://www.gimp.org

jim-on-linux
http://www.inqvista.com


> Sanoski wrote:
> > This might be a dumb question. I don't
> > know. I'm new to all this. How do you
> > find icons for your programs? All GUI
> > applications have cool icons that
> > represent various things. For instance,
> > to save is often represented as a disk,
> > etc. You know, the small little picture
> > references that give meaning to the
> > phrase 'Graphical User Interface'. But
> > I'm not a graphics artist! Drawing is
> > simply one talent that skipped me
> > completely. Where can I find icons to
> > use with my programs?
> >
> > I don't even know how to search for
> > them, because I'm not sure how to word
> > it. I tried Googling various things:
> > icons, software graphics, application
> > icons, custom graphics, etc, etc. But
> > I'm not getting much luck here you guys.
> >
> > Also, besides just finding a collection
> > of various pre-made icons, who would I
> > talk to to make me some original custom
> > made icons? I'll look for hours and find
> > one or two places, but they never
> > respond to my messages, so I figure they
> > must not do that kind of art work.
> >
> > I'm looking for both: a collection of
> > graphics and some place (or someone)
> > that can make custom original graphics.
> > The latter is just for future reference.
> > The more important one is the former,
> > because I can't even afford to pay for
> > originals right now. But maybe I will
> > soon, so it would be nice to have a
> > resource.
> >
> > Thanks in advance,
> > Joshua
>
> http://tango.freedesktop.org/Tango_Desktop
>_Project http://www.oxygen-icons.org/
> http://everaldo.com/crystal/


From s0suk3 at gmail.com  Sat May  3 12:58:49 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sat, 3 May 2008 09:58:49 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
	<7334e775-e9c2-473f-96b5-138efaf9bf5b@x35g2000hsb.googlegroups.com>
Message-ID: <86694f9f-5d8e-4db7-a524-b875e51ce22e@e39g2000hsf.googlegroups.com>

On May 2, 3:26 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 2, 2:49 pm, Jeff <jeffo... at gmail.com> wrote:
>
> > The generally used idiom for that is:
>
> > lst = ['a', 'b', 'c']
> > if 'a' in lst:
> >   foo = lst.index('a')
>
> Jeff - Gracias !!
>
> I am fairly new to python. Thanks for the example code snippet above.
> It is the same amount of code as receiving -1 and then checking for
> doing an "if else" for -1 so now i don't feel bad. But, being new to
> this paradigm, raising of an exception when it can't find the element
> appears to be weird to me for some unexplainable reason.

I don't know how Python looks up internally 'a' in the list in the
statement "if 'a' in lst: ... ," but just from common sense, I think
it would have to do the work of finding it twice, first in the
statement "'a' in lst," and then in the statement "lst.index('a')." If
you had a lot of elements in the list, and/or you were looping a lot
of times to find a lot of things, it'd be better to do the try/except
form.


From martin at v.loewis.de  Sun May 25 16:06:16 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:06:16 +0200
Subject: Unicode lists and join (python 2.2.3)
In-Reply-To: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>
References: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>
Message-ID: <4839c6b8$0$21455$9b622d9e@news.freenet.de>

>     x = [u"\xeeabc2:xyz", u"abc3:123"]
>     u = "\xe7abc"

u is not a Unicode string.

>     x.append("%s:%s" % ("xfasfs", u))

so what you append is not a Unicode string, either.

>     x.append(u"Hello:afddfdsfa")
> 
>     y = u'\n'.join(x)

As a consequence, .join tries to convert the byte string to
a Unicode string, and fails, because it contains non-ASCII
bytes.

> Why does this work with no exceptions
> 
>     x=[]
>     u = "\xe7abc"
>     x.append("%s:%s" % ("xfasfs", u))

% here is applied to a byte string, with all arguments also byte
strings. The result is a byte string.
> 
> and this doesnt
>     x=[]
>     u = "\xe7abc"
>     x.append("%s:%s" % (u"xfasfs", u))

% is applied to a byte string, with one argument being a Unicode
string. The result is a Unicode string, where all byte strings
get converted to Unicode. Converting u fails, as it has non-ASCII
bytes in it.

Regards,
Martin


From nagle at animats.com  Wed May 21 22:36:30 2008
From: nagle at animats.com (John Nagle)
Date: Wed, 21 May 2008 19:36:30 -0700
Subject: How do I know when all threads are done?
In-Reply-To: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
References: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
Message-ID: <4834d8d1$0$34551$742ec2ed@news.sonic.net>

Zerge wrote:
> I can launch threads just fine, but then I have to do a time.sleep(n)
> so the main thread from which they where launched will wait for all
> the threads to return.
> 
> How can I detect when all threads are done and then return control to
> the main threads?
> 
> Thanks for your help

     Use "join".

				John Nagle


From inhahe at gmail.com  Fri May 16 23:09:20 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 23:09:20 -0400
Subject: help compiling Python on vs 2008!
Message-ID: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>

In order to compile Python, I need to compile 7 external libraries manually 
that don't come with Python, the first being tcl. I'm compiling on VS 2008. 
Since the Python source doesn't have a PCBuild9 directory, I'm using the 
PCBuild8 directory. When following readme.txt to a T, tcl won't compile. 
First it gave me an error because an environment variable wasn't set, so I 
dug in and found out what needs to be set (MSDEVDIR, MSVCDIR, or MSSDK) and 
set it. Not that I know what it needs to be set to, but I made a good guess 
based on some google searches. Now I don't get that error, but I get a 
truckload of C errors when compiling.
Here's the first one, or actually, all the output up to and including the 
first C error:

Microsoft (R) Program Maintenance Utility Version 9.00.21022.08
Copyright (C) Microsoft Corporation. All rights reserved.

===============================================================================
*** Compiler has 'Optimizations'
*** Compiler has 'Pentium 0x0f fix'
*** Linker has 'Win98 alignment problem'
*** Intermediate directory will be '.\Release\tcl_Dynamic'
*** Output directory will be '.\Release'
*** Suffix for binaries will be ''
*** Optional defines are ''
*** Dependency rules are not being used.

cl -nologo -c -W3 -YX -Fp.\Release\tcl_Dynamic\ -QI0f -O2 -Op -Gs -MD -I
"..\win" -I"..\generic" -DTCL_PIPE_DLL=\"tclpip84.dll\" -DBUILD_tcl -Fo.\Relea
se\tcl_Dynamic\ @E:\Users\ADMINI~1\AppData\Local\Temp\nmD926.tmp
cl : Command line warning D9002 : ignoring unknown option '-YX'
cl : Command line warning D9002 : ignoring unknown option '-QI0f'
cl : Command line warning D9002 : ignoring unknown option '-Op'
regerror.c
..\generic\regerror.c(53) : warning C4996: 'errcode': This name was 
supported du
ring some Whidbey pre-releases. Instead, use the standard name errno_t.
C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\crtdefs.h(548) :
see declaration of 'errcode'
..\generic\regerror.c(53) : error C2081: 'preg' : name in formal parameter 
list
illegal


what is going on here, and how do I compile these external libraries? 




From banibrata.dutta at gmail.com  Fri May  9 06:58:33 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 16:28:33 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
Message-ID: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>

Hi,

I already have Python25, and need to install Python24. I would prefer not to
remove Python25, but each Python version seems to update the registry, I
guess (not sure), overwriting each other's entries. Any way to have both
versions ?

-- 
regards,
Bani
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From upton at virginia.edu  Thu May 22 15:06:01 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 15:06:01 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>

On Thu, May 22, 2008 at 2:53 PM, Mensanator <mensanator at aol.com> wrote:
> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>
>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>
> If you actually need that many digits, use a different library.
>
>>>> import gmpy
>
>>>> print gmpy.pi(64) # 64 bit precision
> 3.14159265358979323846
>>>> print gmpy.pi(128) # 128 bit precision
> 3.141592653589793238462643383279502884197
>>>> print gmpy.pi(16384) # 16384 bit precision
> 3.14159265358979323846264338327950288419716939937510582097494459
> 2307816406286208998628034825342117067982148086513282306647093844
> 6095505822317253594081284811174502841027019385211055596446229489
> 5493038196442881097566593344612847564823378678316527120190914564
> 8566923460348610454326648213393607260249141273724587006606315588
> 1748815209209628292540917153643678925903600113305305488204665213
> 8414695194151160943305727036575959195309218611738193261179310511
> 8548074462379962749567351885752724891227938183011949129833673362
> 4406566430860213949463952247371907021798609437027705392171762931
> 7675238467481846766940513200056812714526356082778577134275778960
> 9173637178721468440901224953430146549585371050792279689258923542
> 0199561121290219608640344181598136297747713099605187072113499999
> 9837297804995105973173281609631859502445945534690830264252230825
> 3344685035261931188171010003137838752886587533208381420617177669
> 1473035982534904287554687311595628638823537875937519577818577805
> 3217122680661300192787661119590921642019893809525720106548586327
> 8865936153381827968230301952035301852968995773622599413891249721
> 7752834791315155748572424541506959508295331168617278558890750983
> 8175463746493931925506040092770167113900984882401285836160356370
> 7660104710181942955596198946767837449448255379774726847104047534
> 6462080466842590694912933136770289891521047521620569660240580381
> 5019351125338243003558764024749647326391419927260426992279678235
> 4781636009341721641219924586315030286182974555706749838505494588
> 5869269956909272107975093029553211653449872027559602364806654991
> 1988183479775356636980742654252786255181841757467289097777279380
> 0081647060016145249192173217214772350141441973568548161361157352
> 5521334757418494684385233239073941433345477624168625189835694855
> 6209921922218427255025425688767179049460165346680498862723279178
> 6085784383827967976681454100953883786360950680064225125205117392
> 9848960841284886269456042419652850222106611863067442786220391949
> 4504712371378696095636437191728746776465757396241389086583264599
> 5813390478027590099465764078951269468398352595709825822620522489
> 4077267194782684826014769909026401363944374553050682034962524517
> 4939965143142980919065925093722169646151570985838741059788595977
> 2975498930161753928468138268683868942774155991855925245953959431
> 0499725246808459872736446958486538367362226260991246080512438843
> 9045124413654976278079771569143599770012961608944169486855584840
> 6353422072225828488648158456028506016842739452267467678895252138
> 5225499546667278239864565961163548862305774564980355936345681743
> 2411251507606947945109659609402522887971089314566913686722874894
> 0560101503308617928680920874760917824938589009714909675985261365
> 5497818931297848216829989487226588048575640142704775551323796414
> 5152374623436454285844479526586782105114135473573952311342716610
> 2135969536231442952484937187110145765403590279934403742007310578
> 5390621983874478084784896833214457138687519435064302184531910484
> 8100537061468067491927819119793995206141966342875444064374512371
> 8192179998391015919561814675142691239748940907186494231961567945
> 2080951465502252316038819301420937621378559566389377870830390697
> 9207734672218256259966150142150306803844773454920260541466592520
> 1497442850732518666002132434088190710486331734649651453905796268
> 5610055081066587969981635747363840525714591028970641401109712062
> 8043903975951567715770042033786993600723055876317635942187312514
> 7120532928191826186125867321579198414848829164470609575270695722
> 0917567116722910981690915280173506712748583222871835209353965725
> 1210835791513698820914442100675103346711031412671113699086585163
> 9831501970165151168517143765761835155650884909989859982387345528
> 3316355076479185358932261854896321329330898570642046752590709154
> 8141654985946163718027098199430992448895757128289059232332609729
> 9712084433573265489382391193259746366730583604142813883032038249
> 0375898524374417029132765618093773444030707469211201913020330380
> 1976211011004492932151608424448596376698389522868478312355265821
> 3144957685726243344189303968642624341077322697802807318915441101
> 0446823252716201052652272111660396665573092547110557853763466820
> 6531098965269186205647693125705863566201855810072936065987648611
> 7910453348850346113657686753249441668039626579787718556084552965
> 4126654085306143444318586769751456614068007002378776591344017127
> 4947042056223053899456131407112700040785473326993908145466464588
> 0797270826683063432858785698305235808933065757406795457163775254
> 2021149557615814002501262285941302164715509792592309907965473761
> 2551765675135751782966645477917450112996148903046399471329621073
> 4043751895735961458901938971311179042978285647503203198691514028
> 7080859904801094121472213179476477726224142548545403321571853061
> 4228813758504306332175182979866223717215916077166925474873898665
> 4949450114654062843366393790039769265672146385306736096571209180
> 7638327166416274888800786925602902284721040317211860820419000422
> 9661711963779213375751149595015660496318629472654736425230817703
> 6751590673502350728354056704038674351362222477158915049530984448
> 9333097

Who wants to verify that that's correct to that many digits? ;)


From wizzardx at gmail.com  Sun May  4 05:45:09 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 11:45:09 +0200
Subject: Fw: Script Optimization
In-Reply-To: <2dc977e3-4a4d-43f7-b56a-3d51f9a1be8a@w1g2000prd.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.517.1209886388.12834.python-list@python.org>
	<2dc977e3-4a4d-43f7-b56a-3d51f9a1be8a@w1g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040245s3f403183mde712a09d113ce7b@mail.gmail.com>

Forwarding back to the list.

---------- Forwarded message ----------
From: lev <levlozhkin at gmail.com>
Date: Sun, May 4, 2008 at 10:21 AM
Subject: Re: Script Optimization
To: David <wizzardx at gmail.com>


On May 4, 12:32 am, David <wizza... at gmail.com> wrote:
 > >  It's too long to post here (160 lines) so here's the link:
 > >  http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
 > >  (if that doesn't work:http://uppit.com/CKOYHE)
 >
 > >  Thanks in advance,
 > >  lev
 >

> Neither link works for me. I get an error page "Error: invalid
 > download linnk". How about you send it to the list as an attachment?
 >
 > David.

 Sorry.. but I don't know how to send an attachment here... I am not
 using a dedicated email client, just google groups, and the option
 seems to elude me.
 I forgot to comment it when I was writing it.... I am working on
 commenting it and making it more readable, and I'll post that tomorrow
 (I'm going to sleep... it's 2 in the morning)
 This is a bit long, sorry:

 #!/usr/bin/env python

 def main():
        from sys import argv
        from optparse import OptionParser
        from os import chdir,path
        fullpath = path.abspath(path.dirname(argv[0]))
        chdir(fullpath[:-10])
        checksums = '%s//checksums.md5' % fullpath
        newdirname = ('string1', 'string2', 'string3', 'string4')
        usage = "%prog [options]"
        parser = OptionParser(usage)
        parser.add_option('-c', '--check', action='store_true', dest='check',
 help = 'verify checksums')
        parser.add_option('-r', '--rename', action='store_true',
 dest='rename', help = 'rename files to a more usable form (write
 rights needed)')
        (options, args) = parser.parse_args()
        if options.check:
                check(checksums)
                chdir(fullpath)
                pass
        if options.rename:
                chdir('..')
                rename(newdirname, checksums)
                pass
        if not options.check and not options.rename:
                parser.print_help()
                pass
        return

 def check(checksums):
        checksums = open(checksums, 'r')
        chgfiles = {}
        msngfiles = []
        for fline in checksums.readlines():
                line = fline.split(' *')
                orig = line[0].upper()
                try:
                        file = open(line[1].strip(),'rb')
                        import md5
                        chunk = 8196
                        sum = md5.new()
                        while(1):
                                chunkdata = file.read(chunk)
                                if not chunkdata:
                                        break
                                sum.update(chunkdata)
                                pass
                        new = sum.hexdigest().upper()
                        file.close()
                        if  new == orig:
                                print '.',
                                pass
                        else:
                                chgfiles[line[1]] = (orig,new)
                                pass
                except IOError:
                        msngfiles.append(line[1])
                        pass
                pass
        checksums.close()
        chgfileskeys = chgfiles.keys()
        chgfileskeys.sort()
        msngfiles.sort()
        print '\n'
        if len(chgfiles) != 0:
                print 'Files changed:'
                for key in chgfileskeys:
                        print key.strip('\n'),'changed
from:\n\t',chgfiles[key][0],'to\n
 \t',chgfiles[key][1]
                        pass
                print '\n\t',len(chgfiles),'file(s) changed.\n'
                pass
        if len(msngfiles) != 0:
                print 'Files not found:'
                for x in range(len(msngfiles)):
                        print '\t',msngfiles[x]
                        pass
                print '\n\t', len(msngfiles),'file(s) not found.\n'
                pass
        print "\n\tChecksums Verified\n"
        return

 def rename(newdirname, checksums):
        from os import chdir, rename
        from glob import glob
        dict = md5format(checksums)
        dirlist = glob('./00[1-4]string [1-4]')
        dirlist.sort()
        for x in range(4):
                rename(dirlist[x],newdirname[x])
                print '\t',dirlist[x],'renamed to:',newdirname[x]
                chdir('./%s' % newdirname[x])
                for oldfilename in glob('*.mp3'):
                        newfilename = oldfilename[3:]
                        rename(oldfilename,newfilename)
                        print '\t\t',oldfilename,'renamed to:',newfilename
                        pass
                dict = md5fname_edit(dict,dirlist[x],newdirname[x])
                pass
                chdir('..')
        md5write(dict, checksums)
        replace('Webpage.htm', dirlist, newdirname)
        print '\n\tDirectories and Files renamed.'
        return

 def md5format(checksums):
        dict = {}
        checksums = open(checksums, 'r')
        for line in checksums.readlines():
                splitline = line.split(' *')
                dict[splitline[1]] = (splitline[0],splitline[1].split('\\'))
                pass
        checksums.close()
        return dict

 def md5fname_edit(dict, olddir, newdir):
        for x in dict.keys():
                if dict[x][1][0] == olddir[2:]:
                        dict[x] =(dict[x][0],[newdir,dict[x][1][1]])
                        if dict[x][1][1][0] == '0':
                                dict[x]
=(dict[x][0],[dict[x][1][0],dict[x][1][1][3:]])
                                pass
                        pass
                pass
        return dict

 def md5write(dict, checksums):
        keys = dict.keys()
        keys.sort()
        checksums = open(checksums, 'w')
        for x in keys:
                try:
                        checksums.writelines('%s *%s/%s' %
(dict[x][0],dict[x][1][0],dict[x]
 [1][1]))
                        pass
                except IndexError:
                        checksums.writelines('%s *%s' %
(dict[x][0],dict[x][1][0]))
                        pass
                pass
        return

 def replace(file, oldlist, newlist):
        from os import remove
        new = open(file,'r').read()
        for x in range(4):
                new = new.replace(oldlist[x][2:],newlist[x],1)
                pass
        remove(file)
        file = open(file,'w', len(new))
        file.write(new)
        return

 if __name__ == '__main__':
        main()

 Thanks in advance,
 lev


From larzluv at hotmail.com  Sun May 11 20:12:07 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 17:12:07 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<mailman.942.1210523706.12834.python-list@python.org>
Message-ID: <6d6c1048-4483-417e-a40c-2af77de9ab2d@c58g2000hsc.googlegroups.com>

(quoted text below my reply)

THANK YOU SO MUCH, Michael!

Criminitly!  Figures!  HA!  I had it the WHOLE TIME, but didn't
realize it!  ;)  (As mentioned, I had FILE installed from GnuWin32.)
DUH!  I just neglected to do a search for "magic1.dll"... the most
obvious of the obvious!

I copied it from C:\Program Files\GnuWin32\bin\magic1.dll to C:
\Program Files\python25\libs.

Imports fine now.  (I'll *test* it later.  Then write-up my HowTo... I
think I'll even see if I can make an EGG for others... SOUNDS "easy"
with EasyInstall [http://peak.telecommunity.com/DevCenter/
EasyInstall]...  I'll -see-...  :) )

Ah, sometimes one CAN'T see the forest for the trees; a few hours
hacking away at getting things going to THIS point will do it to ya...
err, or at least "to me"!  :D


Thanks, again, Michael...
-Larry



On May 11, 11:34 am, Michael Torrie <torr... at gmail.com> wrote:
> Larry Hale wrote:
> > Now I *presume* my problem (at this point) is that I need to have
> > libmagic named as "magic1.dll" -wherever- this module is looking for
> > it.  I'm just not sure, let alone if this is true, WHERE Python/
> > modules expect to find such things.
>
> > Also, which version(s)/file(s) should be placed where, or...??
>
> The dll you are looking for is here:
>
> http://downloads.sourceforge.net/gnuwin32/file-4.21-bin.zip?modtime=1...
>
> The .dll.a file you mention is just a linker stub for when you want to
> compile against it (as you are doing when building python-magic).
>
> The magic1.dll file in the file-4.21-bin.zip package should be placed
> anywhere in the path.  Since you'll be using it with python, you could
> probably stick it in the python25/bin folder (where ever your python
> system is installed).



From eduardo.padoan at gmail.com  Thu May  8 08:57:03 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Thu, 8 May 2008 09:57:03 -0300
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <dea92f560805080557o6d1c14eiae12e172867d54d9@mail.gmail.com>

On Thu, May 8, 2008 at 7:25 AM, Raxit at MyKavita.com
<raxitsheth2000 at gmail.com> wrote:
> Hi,
>
>  i was reading/learning some hello world program in python.
>  I think its very simillar to Java/C++/C#. What's different (except
>  syntax) ?
>
>  what can i do easily with python which is not easy in c++/java !?

Programming in a pure duck typing style
http://en.wikipedia.org/wiki/Duck_typing

>  Tnx,
>  Raxit
>  www.mykavita.com
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From yves at zioup.com  Fri May 23 10:23:28 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 14:23:28 GMT
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
	<NisZj.288476$pM4.73650@pd7urf1no>
	<g15q3v$fdp$02$1@news.t-online.com>
Message-ID: <ArAZj.161276$Cj7.147288@pd7urf2no>

Peter Otten <__peter__ at web.de> wrote:

> The speed gain is significant. Why should I throw away useful information if
> I have it? 

My thinking was that it wasn't generic enough, and I was looking for a
solution that would work for more generic problem. I agree, I shouldn't
have used the world "elegant" here, more generic would have been better.

> I'd even be willing to convert one arbitrary iterable to a list
> to get the length information.

> $ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "aa = list(a);
> items=[None]*(2*len(aa)); items[::2] = aa; items[1::2] = b"
> 10000 loops, best of 3: 29.5 usec per loop

Yes, I like that, it is as generic as the reduce one.


> are more complicated than elegant. Not recommended.

You proved your point. Every book and webpage out there says that
functional solutions are faster than loops, that's why I tried hard not
to use a loop, and "reduce" is considered functional - I should have
timed it.


Yves.
http://www.SollerS.ca



From deets at nospam.web.de  Wed May 28 13:46:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 19:46:16 +0200
Subject: Struct usages in Python
In-Reply-To: <mailman.1696.1211996106.12834.python-list@python.org>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
Message-ID: <6a5k3dF36cq8mU1@mid.uni-berlin.de>

Alex Gusarov schrieb:
>>  class Event(object):
>>
>> Always subclass object, unless you have a very compelling reason not to,
>> or you are subclassing something else.
>>
> 
> I've thought that if I write
> 
> class Event:
>     pass
> 
> , it'll be subclass of object too, I was wrong?


Yes. That is the somewhat unfortunate difference between new-style and 
old-style classes. Use new-style if you can, and that means that 
"object" must be part of the inheritance graph.

http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html

Diez


From kib2 at free.fr  Sat May 24 10:41:26 2008
From: kib2 at free.fr (kib)
Date: Sat, 24 May 2008 16:41:26 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <69qmhcF33pou1U1@mid.uni-berlin.de>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
Message-ID: <48382917$0$20800$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> Tool69 schrieb:
>> Hi,
>>
>> Until now, I was running my own static site with Python, but I'm in
>> need of dynamism.
>>
>> After reading some cgi tutorials, I saw Joe Gregorio's old article
>> "Why so many Python web frameworks?" about wsgi apps [http://
>> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
>> question about it. The code he gave works like a charm (I had to make
>> a little change because SQLAlchemy has changed since), but how the
>> hell can I serve static files (css, js, images, etc.) within an wsgi
>> app, ie inside a '/static' directory ?!
> 
> There is a wsgi-app out there that is called "static". Use that.
> 
> And it's the first hit on google "wsgi static"... :)
> 
> http://lukearno.com/projects/static/
> 
> Diez

Hi Diez,

and thanks for yout help. In fact I already found it but never managed 
to get it work because the static doc says :

from wsgiref.simple_server import make_server
import static
make_server('localhost', 9999, static.Cling('/var/www')).serve_forever()

and inside J.Gregorio's tutorial it is:

from wsgiref.simple_server import WSGIServer, WSGIRequestHandler
httpd = WSGIServer(('localhost', 8080), WSGIRequestHandler)
httpd.set_app(urls.urls)

It does not use 'make_server()' so how can I adapt it ?

I finally managed to work with static files with a little hack, but it's 
ugly because I'm reading each static file per request.

Kib.


From dmitrey.kroshko at scipy.org  Fri May  9 06:04:14 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:04:14 -0700 (PDT)
Subject: simple question about Python list
Message-ID: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>

hi all,
suppose I have 2 lists
list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
and
list2 = [0, 2, 4] # integer elements

howto (I mean most simple recipe, of course) form list3 that contains
elements from list1 with indexes from list2, i.e.

list3 = ['elem0', 'elem2', 'elem4']?

Thank you in advance, D.


From pavlovevidence at gmail.com  Wed May 21 17:13:15 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 14:13:15 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <a7ae43da-7ce4-44e5-827e-db3289e0ddf6@e39g2000hsf.googlegroups.com>

On May 21, 4:10 pm, notbob <not... at nothome.com> wrote:
> Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.

Ha, exactly the opposite here.

> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?

If you just want to write a simple blog, PHP is probably good enough.
It's undeniably easier to jump into web programming with PHP--
partially because of it's widespread support and straightforward
usage, partially because Python web solutions tend to aim for
separability of content and presenation which raises the bar for
entry--and that could easily outweigh your concerns over quality of
the language.

(Incidentally: if you didn't want to start a religious war, it would
have been better if you had posted it separately to the two groups.
Lots of flamewars start by one person posting a cutdown not intended
for the ears of the other group.)


Carl Banks


From iainking at gmail.com  Tue May 13 08:41:25 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 05:41:25 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
Message-ID: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>

Hi.  I have a modal dialog whcih has a "Browse..." button which pops
up a file selector.  This all works fine, but the first thing the user
has to do when they open the dialog is select a file, so I would like
the dialog to automatically call the onBrowse function as soon as the
dialog opens.  However, I don't know how to do this.

dlg.ShowModal()
onBrowse()

obviously doesn't work, and neither does the reverse.  I was hoping
that the dialog would throw some kind of "I have been shown" event,
but it doesn't (as far as I can tell).  How do I make the dialog do
something as soon as it's been shown?

Iain


From kay.schluehr at gmx.net  Sat May 10 09:41:36 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 10 May 2008 06:41:36 -0700 (PDT)
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <ef9aee02-661f-4556-b0b7-76434f57ca55@m36g2000hse.googlegroups.com>

On 10 Mai, 07:52, "xah... at gmail.com" <xah... at gmail.com> wrote:
> In the past weeks i've been thinking over the problem on the practical
> problems of regex in its matching power. For example, often it can't
> be used to match anything of nested nature, even the most simple
> nesting. It can't be used to match any simple grammar expressed by
> BNF. Some rather very regular and simple languages such as XML, or
> even url, email address, are not specified as a regex.

Well formed XML cannot be fully specified within BNF as well because
it is context sensitive: in order to recognize a tag/endtag pair one
has to maintain a stack. That's not a big deal in practice if one
wants to write an XML parser but one can't use an arbitrary LL or LR
parser generator to produce a parse tree representing the XML.



From http  Sun May 11 02:32:35 2008
From: http (Paul Rubin)
Date: 10 May 2008 23:32:35 -0700
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
Message-ID: <7xbq3dfj0c.fsf@ruckus.brouhaha.com>

philly_bob <b0bm00r3 at gmail.com> writes:
> algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
> accs=[]
> for alg in algs:
>    thisacc=getattr(alg.accuracy)()   # picked this technique on
> comp.lang.python last month
>    accs.append(thisacc)

I think what you mean is (untested):

     algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
     accs = sorted(((alg.accuracy(), alg.name()) for alg in algs),
                   reverse=True)
     for i,(alg_acc, alg_name) in enumerate(accs):
        print '%2d %5s %0.2f'% (i, alg_name, alg_acc)

This assumes a method alg.name() which tells you the name of the
algorithm.  I don't understand how you're converting the string 'AlgA'
to an algorithm object in your example above.


From benjamin.kaplan at case.edu  Fri May 16 17:01:08 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 16 May 2008 17:01:08 -0400
Subject: IDE for Python
In-Reply-To: <g0kpjo$5hd$1@ger.gmane.org>
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
	<g0kpjo$5hd$1@ger.gmane.org>
Message-ID: <ec96e1390805161401m292c2e84ic24f670cd844aa04@mail.gmail.com>

On Fri, May 16, 2008 at 4:08 PM, Joshua Kugler <jkugler at bigfoot.com> wrote:

> Jonathan Barbero wrote:
> >  I?m newbie with Python and to learn it better I want to use a good IDE
> to
> > concentrate on Python power. There is any IDE like Eclipse for Java for
> > Python? If not, what is the best Python?s IDE for you?
>
> This is an EFAQ (extremely frequently asked question).
>
>
> http://www.google.com/search?hl=en&q=python+ide+site%3Amail.python.org%2Fpipermail%2Fpython-list%2F&btnG=Google+Search
>
> j
>
There is also the python wiki page that lists dozens of editors.

http://wiki.python.org/moin/PythonEditors


>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bignose+hates-spam at benfinney.id.au  Sat May 10 03:51:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 10 May 2008 17:51:53 +1000
Subject: Find more than one error at once
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <87d4nua95y.fsf@benfinney.id.au>

Joseph Turian <turian at gmail.com> writes:

> Is it possible to coax python to find more than one error at once?

Definitely, write unit tests and run the whole suite
<URL:http://www.python.org/doc/lib/module-unittest>. All errors found
by your unit test suite will be reported.

If you mean the Python parser and compiler, then the answer to this is
in the Zen of Python: "In the face of ambiguity, refuse the temptation
to guess". An error in parsing or compiling leaves no clear
unambiguous path for finding further parsing or compilation errors.

-- 
 \          "It's a good thing we have gravity or else when birds died |
  `\             they'd just stay right up there. Hunters would be all |
_o__)                                     confused."  -- Steven Wright |
Ben Finney


From kyrie at uh.cu  Wed May 14 16:03:05 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 14 May 2008 16:03:05 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <200805141603.05465.kyrie@uh.cu>

On Tuesday 13 May 2008 01:05:38 pm Dave Parker wrote:
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.

On my [modest] experience, bandwidth trumps code speed by a large fraction. My 
experience is tainted, though, with me living in Cuba and Cuba having almost 
no bandwidth available.

> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
>
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"

So, they edit the HTML code by hand. The interview explicitly mentions the 
features "consistently nice and polished", not "faster to compute". You can 
always throw more hardware when the problem is about speed. The real edge on 
your competitive marked should be the "consistently nice and polished", and 
neither python, nor [I hope] Flaming Thunder is going to help you with that.

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

I find it more likely that the users are more concerned about how quickly the 
latest tidbit reaches your frontpage than with the extra few milisenconds 
achieved by switching the programming language or throwing another server in 
the cluster.


-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From onsen-neko at gmx.net  Fri May  9 15:53:03 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Fri, 9 May 2008 21:53:03 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <48240921$0$7184$426a74cc@news.free.fr>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
	<48240921$0$7184$426a74cc@news.free.fr>
Message-ID: <200805092153.03769.onsen-neko@gmx.net>

Am Freitag 09 Mai 2008 10:19:45 schrieb Bruno Desthuilliers:

> >> very often sees do-nothing catch-all try/catch blocks in Java -
> >> which is way worse than just letting the exception propagate. I
> >> find all this totally pointless, because there's just no way for a
> >> compiler to check if your code is logically correct.
> >
> > But it's enough if the called method exists and returns the correct
> > type. At least it prevents a crash.
>
> Then providing an appropriate default in the base class is enough
> too.

Only working *if* there is a base-class, and not only convention for 
should-have-methods.

> >>> That's the point. Interfaces garantee that a duck is a duck, an
> >>> not only a chicken that quack.
> >>
> >> Who cares if it's a chicken as long as it quacks when you ask her
> >> to ? Now *This* is the whole point of chicken^Mduck typing, isn't
> >> it ?-)
> >
> > Ducks can also swim and fly.  And if you need a really duck,
>
> If you're code expects something that quacks, swims and flies,
> anything that quacks, swims and flies is ok. You just don't care if
> it's a duck or a flying whale with a quacking device tied to it.

Not the point.

> > Of course, in the practical world that all doesn't  matter. But in
> > the theoretical world of the big coding farms, called business,
> > that's one cornerstone of success, in the tinking of managers and
> > so.
>
> Sorry, I live in a very practical world - and we're by no mean
> running out of business here...

Like i said.


From banibrata.dutta at gmail.com  Fri May 16 10:36:01 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 16 May 2008 20:06:01 +0530
Subject: free dictionary english - spanish?
In-Reply-To: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>
References: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805160736u670a6a75jc7645f326479d9c5@mail.gmail.com>

if it is complete sentence translation that you intend to do, then there is
a lot more than just word dictionary that you need. you need the grammer
too. hope you have that covered.

On 5/16/08, globalrev <skanemupp at yahoo.se> wrote:
>
> i want to write a translationprogram, i have the  webapp done already.
>
> i need a big free dictionary though. english-spanish/spanish-english
> seems like the best i know some spanish and thats what also is needed
> the most i think together with chinese.
>
> anywhere you can download one? preferrably easy to parse...
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From daveparker at flamingthunder.com  Wed May 21 18:28:18 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 15:28:18 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
Message-ID: <d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>

On May 21, 4:21?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Which is exactly what the python decimal module does.

Thank you (and Jerry Hill) for pointing that out.  If I want to check
Flaming Thunder's results against an independent program, I'll know to
use Python with the decimal module.


From BrianVanderburg2 at aim.com  Thu May  8 08:55:54 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 08 May 2008 08:55:54 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <20080508083323.06a74930.darcy@druid.net>
References: <CeuSj.107251$rd2.30692@pd7urf3no>	<87bq3ozs09.fsf@benfinney.id.au>	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>	<4822E485.4040107@aim.com>
	<20080508083323.06a74930.darcy@druid.net>
Message-ID: <4822F85A.8030901@aim.com>

D'Arcy J.M. Cain wrote:
> On Thu, 08 May 2008 07:31:17 -0400
> Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>   
>> This is sort of related, but I'm wondering what is different between 
>> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
>> thing, since an absolute path is not specified, find 'python' from the 
>> PATH environment,  I don't really know.
>>     
>
> Well, I know what happened when I tried it.  What happened when you
> tried it?
>
>   
I haven't tried it but I've seen some files like written that in the 
past with just a name and no path for some other interpreter (perl or sh 
probably) and didn't know what the different was or if it was even 
valid.  I at a windows system now so I can't try it yet.

Brian Vanderburg II


From usenet at solar-empire.de  Mon May  5 08:28:27 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Mon, 5 May 2008 14:28:27 +0200
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <b4b3f5-0ng.ln1@pluto.solar-empire.de>

globalrev <skanemupp at yahoo.se> wrote:
> class Foo(object):
>        def Hello(self):
>                print "hi"
> 
> object is purple, ie some sort of reserved word.
> 
> why is self in black(ie a normal word) when it has special powers.

Because `self` is just a name. Using `self` is a convention, but one can
use any name which is not reserved.

> replacing it with sel for example will cause an error when calling
> Hello.

Which error? I don't get one.

0:tolot:/tmp> python f.py
hi
0:tolot:/tmp> cat f.py
class Foo(object):
        def Hello(sel):
                print "hi"

Foo().Hello()
0:tolot:/tmp> 

Marc


From stef.mientki at gmail.com  Wed May 14 13:43:13 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Wed, 14 May 2008 19:43:13 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
Message-ID: <482B24B1.6080400@gmail.com>

clabepa wrote:
> Stef Mientki wrote:
>
>> I've ran the first real world application through PPyGui-emulator,
>> so I think it's time to release the first version.
>> There's lot of room for improvements and a more beautiful layout.
>>
>> PPyGui-emulator is build upon wxPython and released under BSD license.
>>
>> For remarks, screen shots and downloads, see
>> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html
>
> Wow! wonderful.
> I was searching for it for debugging and easy development purposes,
> screenshots sounds promising.
>
> but the api.py link is broken.
Well the file is correctly at the server,
and indeed it downloads as nonsense ???
Is it not possible to just put a py-file on the server ??

Anyway, I've changed it into a zip file, and now everything works (at 
least at my place)


cheers,
Stef


From castironpi at gmail.com  Thu May 15 10:01:30 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:01:30 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <e51f72f7-2cc2-4496-b6fd-488c9308c41d@w7g2000hsa.googlegroups.com>

On May 15, 8:32?am, castironpi <castiro... at gmail.com> wrote:
> Why can't I write this?

It is twice one.  Now: Where's My Volume?


From gherron at islandtraining.com  Sat May 10 11:32:47 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 10 May 2008 08:32:47 -0700
Subject: How to call a file
In-Reply-To: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
Message-ID: <4825C01F.1070409@islandtraining.com>

Chris Sprinkles wrote:
> I'm still having trouble with calling a text file and I know its so 
> simple here is the code
> ----------------------------------------------------
> work = open('C:\Documents and Settings\Administrator\My 
> Documents\Chris\Python\Python\work.txt', 'r')
> for line in work.txt:
>     print line
> -----------------------------------------------------
> Ok so I know that the directory is right cause I'm not a complete 
> idiot but I keep getting an error? What am I missing here?
> -Chris-
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
First of all, some terminology: You are not *calling* a file, you are 
*opening* it or reading.

Once you *open* the file, you store the resulting file object in a 
variable named "work", then to use that object to request a line, thus:

for line in work:
  print line


Hint: When you say "I keep getting an error",  you really have not 
provided mush useful information.   In the future, when you get an 
error, and you want help, spend the time to post the error message and 
traceback along with your question.   In this case, the problem was 
trivially easy to spot, but you'll get past these trivial problems 
soon.  Then you'll be more likely to find volunteers who will spend time 
to help *if* you spend the time to provide useful information.

Gary Herron



From Lie.1296 at gmail.com  Sun May 18 09:10:24 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:10:24 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <cc163397-fe6a-4d9f-b5b2-94d4cc4772ad@w8g2000prd.googlegroups.com>

On May 9, 8:41?pm, grbgooglefan <ganeshbo... at gmail.com> wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
>
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
> ? ? ?return 1
>
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
>
> How can I make "not" as "!"?

Are you trying to make Python a C? Realize that when you work with a
language, you play by that language's rule, not by your rule. This
seems like a troll or something.


From deets at nospam.web.de  Tue May 13 17:44:35 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 23:44:35 +0200
Subject: Why can't I import this?
In-Reply-To: <e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
	<e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
Message-ID: <68ugegF2ucssjU1@mid.uni-berlin.de>

> Thumper's dad always told him:  If you don't have anything nice/useful/
> garbage to say, then don't say noth'ng at all.

You mean it's not useful to tell you


  - to give more information on *what* acutally goes wrong?

  - in the meantime, to look harder for your mistake, because it's 
unlikely to be python's failure?


Can't help you then. Won't happen again.

Diez


From efurman at admailinc.com  Tue May 20 18:36:25 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 20 May 2008 14:36:25 -0800
Subject: Struct usage and varying sizes of h, l, etc
Message-ID: <48335269.2000809@admailinc.com>

Greetings,

I'm looking at the struct module for binary packing of ints and floats.  
The documentation refers to C datatypes.  It's been many years since I 
looked at C, but I seem to remember that the data type sizes were not 
fixed -- for example, an int might be two byes on one machine, and four 
bytes on the next.  Can any C programmers verify this?  If it is true, 
does that mean that struct.pack('h', 8001) might give me different 
results depending on the machine it's running on?

Thanks for any help!
--
Ethan
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From basti.wiesner at gmx.net  Mon May 26 11:36:39 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 17:36:39 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<mailman.1599.1211790412.12834.python-list@python.org>
Message-ID: <g1elf9$a0s$01$1@news.t-online.com>

[ Max M <maxm at mxm.dk> ]

> erik.oosterwaal at gmail.com skrev:
>> Hi All,
> 
>> So that's when I started looking at other dynamic languages for
>> webdevelopment. I looked at Ruby on Rails and at the different web-
>> frameworks that are available for Python. The biggest problem there
>> for me is that the MVC type frameworks that are currently very popular
>> are also not what I'm looking for.
> 
> Hi Erik,
> 
> I am an experienced Python developer working mostly in Plone. Before
> that I came from asp like you.
> 
> 
> If you want something that is most like what you are used to, you should
> check out Django. I have not worked in it, but it get high praises from
> developers I trust.
> 
> http://www.djangoproject.com/

Django is one of these "MFC type frameworks" the OP was excatly _not_
looking for ;)
 
> If you want a more "modern" approach you should check out Grok. It has
> been built on all the experiences made with Zope 2, CMF and Plone. It is
> based on Zope 3.
> 
> http://grok.zope.org/
> 
> It is the one I would choose if starting from fresh today.

Grok too is very different from classic asp programming, it even abstracts
much more from HTTP than Django does.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From zer0dyer at verizon.net  Mon May 26 20:49:45 2008
From: zer0dyer at verizon.net (Curtis)
Date: Tue, 27 May 2008 00:49:45 GMT
Subject: php vs python
In-Reply-To: <k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com> <5IH_j.3432$tF1.2671@trnddc01>
	<k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>
Message-ID: <JUI_j.1252$nx6.964@trnddc03>

Jerry Stuckle wrote:
> Curtis wrote:
>> Paul Rubin wrote:
>>> notbob <notbob at nothome.com> writes:
>>>> Well, that's my actual question, then.  Is php really so bad I'm just
>>>> wasting my time?  Or is it really the quickest way to blog 
>>>> functionality?
>>>
>>> php is very easy to get started with and some big sites have been
>>> written in it.  There is lots of low cost php hosting available.  It
>>> is not as good a language as Python.  However, Python's advantages are
>>> strongest in more complex projects.  For simple stuff, php is frankly
>>> less hassle just because of its wide deployment and that extensive
>>> function library that the blog post your quoted described as a bad
>>> thing.  Python's libraries are not bad, but php's are more intensely
>>> focused on web apps and includes what you need as part of the standard
>>> build.  With Python, if you want a database adapter or web template
>>> framework, you have to choose between a bunch of different ones and
>>> download and configure it which often involves head scratching when
>>> the auto-install stuff hits some quirk of your system.  With php, it's
>>> all right there when you flip the switch.
>>>
>>> Knowing lots of languages is good for you.  php is probably your
>>> quickest route to getting a rudimentary web app running.  Python
>>> is a longer term project.  Do both.
>>
>> PHP is more than capable for handling large projects, not just small 
>> scripting jobs. However, Paul's right about PHP being more driven 
>> toward web development, where as Python may be better for different 
>> types of apps.
>>
>> Even then, I think your first reply was best, it just comes down to 
>> what you have more fun writing. Both languages are equally capable of 
>> getting the job done.
>>
>> -- 
>> Curtis
> 
> Not true.  PHP is quite capable of writing large, non-web based 
> projects.  While it's non-browser based display capabilities are 
> somewhat lacking (although there are third party libraries which help a 
> lot), I've written some pretty complicated batch scripts in the past.
> 

Yeah, I see I may have spoken too soon. When I think about it, the PHP 
extensions available do cover a lot of ground. I've played around with 
php-gtk in the past, but nothing major.

To clarify: what I meant to say is that php is especially well suited 
for web development, I didn't mean that it wasn't capable of doing 
non-web based development.

--
Curtis


From mal at egenix.com  Thu May  1 08:10:39 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 01 May 2008 14:10:39 +0200
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <4819B33F.708@egenix.com>

On 2008-05-01 13:37, Lance Gamet wrote:
> Hi, python beginner starting a new project here.
> 
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
> 
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
> 
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?

I don't think this is a Python question, but more a platform
question. Users on different platforms will expect configuration
data in different places. It's usually best to stick to the platform
conventions.

Python has modules available for accessing INI-files, XML-files
and also for the Windows registry, so that part is easy.

> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
> 
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.

If the user is meant to change the data, then you should make this
easy for the user. Putting such data into SQLite will not satisfy that
requirement :-)

If you don't have a GUI tool for the user to change config settings,
then it's probably best to put the configuration into a file that's
easy to edit, e.g. an INI file.

Here's a nice module that supports both reading and writing
INI files:

http://www.voidspace.org.uk/python/configobj.html

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 01 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From fuzzyman at gmail.com  Sat May 24 13:22:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:22:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
Message-ID: <93af845b-fc1a-4e7a-991b-ffa43beef470@8g2000hse.googlegroups.com>

On May 24, 6:18?pm, bearophileH... at lycos.com wrote:
> Ben Finney:
>
> >In Python, the philosophy "we're all consenting adults here" applies.<
>
> Michael Foord:
>
> > They will use whatever they find, whether it is the best way to
> > achieve a goal or not. Once they start using it they will expect us to
> > maintain it - and us telling them it wasn't intended to be used by
> > them in the first place won't cut it.
>
> So they will use the methods with one or two underscores too. And
> imply that you want to document them too.
> They don't seem adult enough, then ;-)


Great! We'll just tell them that...

Michael

> Internal API hiding seems quite less useful if you don't need to let
> customers manage your code.
>
> Bye,
> bearophile



From arnodel at googlemail.com  Sat May 31 08:01:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 13:01:51 +0100
Subject: ValueError: unknown locale: UTF-8
References: <mailman.1790.1212231888.12834.python-list@python.org>
Message-ID: <m2bq2mbs28.fsf@googlemail.com>

Mario Ruggier <mario at ruggier.org> writes:

> On OS X 10.5.2 :
>
> $ python
> Python 2.5.1 (r251:54863, Feb  4 2008, 21:48:13)
> [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import locale
>>>> locale.getdefaultlocale()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/locale.py", line 441, in getdefaultlocale
>     return _parse_localename(localename)
>   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/locale.py", line 373, in _parse_localename
>     raise ValueError, 'unknown locale: %s' % localename
> ValueError: unknown locale: UTF-8
>>>>
>
> This is on open bug or is there more to it?
>
> Regards, mario

Works for me (10.5.3):

marigold:~ arno$ uname -srv
Darwin 9.3.0 Darwin Kernel Version 9.3.0: Fri May 23 00:49:16 PDT 2008; root:xnu-1228.5.18~1/RELEASE_I386
marigold:~ arno$ python -c "import locale; print locale.getdefaultlocale()"
('en_GB', 'UTF8')

-- 
Arnaud


From arnlen at mac.com  Thu May  1 12:54:50 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 18:54:50 +0200
Subject: Photo gallery software
References: <mailman.414.1209654409.12834.python-list@python.org>
Message-ID: <0001HW.C43FC27A00A3F774B01AD9AF@news.individual.de>

On Thu, 1 May 2008 16:59:33 +0200, Scott Sandeman-Allen wrote
(in article <mailman.414.1209654409.12834.python-list at python.org>):

> I've been working with Photologue for a while with some nice results.
>     <http://code.google.com/p/django-photologue/>

Looks like it's time to start reading that Django book.

	Thanks, JA



From __peter__ at web.de  Fri May 16 04:27:17 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 10:27:17 +0200
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <g0jgh4$r7e$00$1@news.t-online.com>

A.T.Hofkamp wrote:

> Yesterday we found the cause of a bug that has caused problems for a long
> time. It appeared to be the following:
> 
> class A(object):
>     pass
> 
> print min(1.0, A())
> 
> which is accepted by Python even though the A() object is not numerical in
> nature.
> 
> The cause of this behavior seems to be the compare operation of the object
> class.
> 
> 
> Is there a way to disable this behavior in Python (other than deriving a
> new 'object-like' class that doesn't do comparisons?)

As Bruno says, this will change in 3.0:

# 3.0
>>> class A: pass
...
>>> min(1.0, A())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    TypeError: unorderable types: A() < float()

For 2.5 and above you can provide a key function as a workaround:

# 2.5
>>> class A(object): pass
...
>>> min(1, A(), key=float)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: float() argument must be a string or a number

Peter


From nospam at nospam.com  Thu May 15 00:38:05 2008
From: nospam at nospam.com (Gilles Ganault)
Date: Thu, 15 May 2008 06:38:05 +0200
Subject: Recommended way to POST with cookies?
Message-ID: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>

Hello

	According to Google, there seems to be several tools available,
possibly deprecated, to download data from web pages by POSTing forms
and save cookies to maintain state.

I need to write a script under Windows with ActivePython 2.5.1.1  that
would do this:
1. Connect through a local proxy, so I can see the whole dialog
between the Python script and the web server
2. POST form variables
3. Save cookies sent by the server (session cookie to keep state)
4. Save received data into an SQLite file

Which tools would you recommend for this type of script?

Thank you.


From lists at cheimes.de  Thu May  1 17:45:01 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 23:45:01 +0200
Subject: where do I begin with web programming in python?
In-Reply-To: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <481A39DD.2020503@cheimes.de>

jmDesktop schrieb:
> I have been to the main python site, but am still confused.  I have
> been using .net, so it may be obvious how to do this to everyone
> else.  I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these.  If I
> have mod_python or fastcgi on apache, where do I start?  I don't have
> clue where to begin to create a web page from scratch in python.  I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.

I highly recommend WSGI instead of mod_python or (fast)cgi. I've heard
only bad things about mod_python over the past years and CGI is totally
old school.

Check out Python Paste, CherryPy and Django. You can also try the Zope,
Zope3 and Plone world but Zope is usually for larger and complex
applications.

Most frameworks come with their own little web server for development, too.

Christian


From Pidgeot18 at verizon.invalid  Sun May 25 23:12:54 2008
From: Pidgeot18 at verizon.invalid (Joshua Cranmer)
Date: Mon, 26 May 2008 03:12:54 GMT
Subject: blogs, longbets.org, and education of sociology
In-Reply-To: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <WUp_j.5882$ED6.2250@trnddc02>

xahlee at gmail.com wrote:
> For about the past 10 years, i have been concerned in the programing
> community's level of education in social issues.

[ Adjusts killfile as necessary. ]

> I have found that recently, a news that would be of interest to
> programers.
> 
> There was a bet at longbets.org (run by Long Now Foundation) regarding
> the importance of blogs. The bet was made in 2002. The prediction has
> a resolution date in 2007.
> 
> In 2008, the bet is resolved. See
> 
> ?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
>  http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/
                            ^^^^^^^^^^

Recently? Also, work on that spelling of yours.

> I'd like encourage, for many of you, who have lots of opinions on
> technical issues or social issues surrounding software, to make use of
> longbets.org. It can help shape your thoughts from blog fart to
> something more refined. In any case, your money will benefit society.

I am getting this sense that you have some sort of monetary connection 
to said site.

> ? I bet that Java will be out of the top 10 programing languages by
> 2020.

FORTRAN was first used in the 1950s. IIRC, it's still in the top 10. 
Languages die hard.

> ? I bet that the top 10 programing languages in 2015 (as determined by
> requirement from job search engine), the majority will be those
> characterized as dynamic languages (e.g. php, perl, python,
> javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
> Haskell)).

Right, once again Java-bashing in a Java forum. There's one (actually 
two, but that's a different story) too many trolls in here!

I'd also like to point out that determining language use by "job search 
engine" requirements is setting one up to certain biases and is not 
sufficiently representative of the true patterns.

> Note, in almost all online forums where tech geekers gather (e.g.
> newsgroups, slashdot, irc, etc), often they are anonymous, each fart
> ignorant cries and gripes and heated arguments, often in a
> irresponsible and carefree way.

Okay, we already know that most /. users tend to act immature, but that 
can hardly be said about newsgroups or IRC. Just read c.l.j.p's postings 
for the last month to disprove your proposition.

> One of the longbets.org's goal is to foster RESPONSIBILITY.

How does making a bet make one responsible?

> In recent years, i have often made claims that the Python's
> documentation, it's writing quality and its documentation quality in
> whole, is one of the worst.

... Are you trying to be ironic on purpose?

> Among all the wild claims in our modern world, from the sciences to
> social or political issues, my claim about Python's technical writing
> quality or its whole quality as a technical documentation, is actualy
> trivial to verify by any standards.

Quality is subjective, so it's not trivial to verify.

> Some of these beer drinking fuckheads are simply being a asshole,
> which are expected by the nature of online tech geeking communities (a
> significance percentage are bored young males). However, many others,
> many with many years of programing experience as a professional,
> sincerely tried to say something to the effect of ?in my opinion it's
> good?, or voice other stupid remarks to the effect of ?why don't you
> fix it?, and in fact find my claim, and its tone too fantastical, to
> the point thinking i'm a youngling who are bent on to do nothing but
> vandalism. (the tech geekers use in-group slang for this: ?troll?.)

Right, so in response to your complaints that something is poor, people 
who try to (IMHO validly so) claim otherwise, or suggest that you take 
the initiative to change the status quo makes them blithering idiots. 
Although I'm sure that I have already lost all credibility with you, I 
would like to point out one of the defining features of open source: if 
you don't like it, you can change it. No one is pointing a gun at your 
head and forcing you to use python's documentation.

Besides, you claim that longbets.org is fostering "responsibility." If 
you want to change the world, take some responsibility and do it yourself.

> By that i mean that there is no
> consensus on the subject among its experts, and the issue is complex,
> and has political implications.

I think all concerned would agree that crossposting a message to several 
groups (one of your examples) with the intent of criticizing those in 
one group and providing information at best tangential to the charters 
of other groups is of no merit, and is bad form.

> I think, the founding of Long Now Foundation with its longbets.org,
> shares a concern i have on the tech geeking communities. In
> particular, tech geekers need to have a broader education on social
> sciences, needs to think in long term, and needs to foster personal

Lesson 1: in public fora, screaming and using the most vulgar language 
at someone is poor social form. In olden times, such language as you 
have presented here might merit punishments like lashings, but in our 
more modern egalitarian society, the worst punishment you will receive 
is a stern glare.

Besides, I think in the long term. I'm already sorting out my retirement 
funds and I've not received a college diploma yet.

 > (note: not reading more motherfucking slashdot or
> motherfucking groklaw or more great podcasts on your beatific language
> or your postmodernistic fuckhead idols)

I read /. more to amuse myself on the idiots there, I don't read 
groklaw, and I don't listen to podcasts. What I do do is program, read, 
espouse my opinions on the current economic and political conditions, 
read, check my email, read, read the newspaper, read, and pick up 
another of McCullough's wonderful books and read some more.

> (One thing you can do, is actually take a course on philosophy,
> history, law, economics, in your local community college.)

And you should also take a course on Manners 101 at your local community 
college.

I would finally like to add that you seem to put yourself on the 
pedestal of being the sole person who is righteous in a quagmire of a 
world, while the truth could not be further. Anyone who must resort to 
base name-calling and mere obscenities when criticizing others has 
problems of their own. (In my defense, I do not place myself on such a 
pedestal: I respect the opinions of others in this newsgroup far above 
myself and would also like to add that they are capable of restraining 
themselves when reading provocative banter while I am not).

-- 
Beware of bugs in the above code; I have only proved it correct, not 
tried it. -- Donald E. Knuth


From python at rcn.com  Mon May  5 04:08:15 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 5 May 2008 01:08:15 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <96087833-b427-4615-9188-c756394af15c@f24g2000prh.googlegroups.com>

On May 3, 9:50?am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> I did the following calculation: ?Generated a list of a million random
> numbers between 0 and 1, constructed a new list by subtracting the mean
> value from each number, and then calculated the mean again.
>
> The result should be 0, but of course it will differ from 0 slightly
> because of rounding errors.

See:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/393090



> Here's the program (pardon my style, I'm a newbie/occasional user):
 . . .
> mean = sum(data)/len(data)
> print sum(x - mean for x in data)/len(data)

See:
http://svn.python.org/view/sandbox/trunk/statistics/statistics.py?rev=40981&view=markup


Raymond



From rewonka at gmail.com  Thu May 29 10:42:07 2008
From: rewonka at gmail.com (rewonka at gmail.com)
Date: Thu, 29 May 2008 07:42:07 -0700 (PDT)
Subject: bit parsing from file
Message-ID: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>

Hello,

I'm tring to make a cutting script.
The problem is the following, i have a sample pattern, for
example :'11101110' (0xEE)
That is the sign of the data begining.
How can i cut a file if the byte stepping is not the same, for
example:

file=open('test.bin','rb')
data=file.read()
print binascii.hexlify(data)            # BB9A (1011101110011010)
file.close()

so i need to cut the first two bit and start to writeout the bit
stream to another file
If somebody have an idea to do this, please share with me.
Thanx

Rew


From inhahe at gmail.com  Sun May 18 00:21:46 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 00:21:46 -0400
Subject: help compiling Python on vs 2008!
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net><e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<mailman.1287.1211058342.12834.python-list@python.org>
Message-ID: <U8OXj.6920$255.269@bignews8.bellsouth.net>

VS2005 seems to be officially supported.  Here's part of the readme file in 
the PCBuild8 directory in the Python 2.5 source.

"
 Building Python using VC++ 8.0
-------------------------------------
This directory is used to build Python for Win32 platforms, e.g. Windows
95, 98 and NT.  It requires Microsoft Visual C++ 8.0
(a.k.a. Visual Studio 2005).  There are two Platforms defined, Win32
and x64.
(For other Windows platforms and compilers, see ../PC/readme.txt.)
"

Although I take your point about sharing resources.  I'm not sure I should 
bother compiling 2.6, since I'll probably come across/already use modules 
that I need that don't support 2.6 since it's so new.  So it would be nice 
to know why following the instructions doesn't work.  Compilers never work 
for me, though.. even when I follow instructions and they work for everybody 
else.  It's like a schroedinbug - I just don't expect them to work.  As a 
matter of principle, though, it /should/ work.. so it's gotta be 
*somebody's* job to debug this! :P

"Christian Heimes" <lists at cheimes.de> wrote in message 
news:mailman.1287.1211058342.12834.python-list at python.org...
> Matthieu Brucher schrieb:
>> Hi,
>>
>> I did not manage to build extension with distutils with Python compiled 
>> with
>> VS different than 2003. The need for 2003 was hard-coded in distutils.
>> You can try building extensions with VS2008 with Scons. This is what I do 
>> a
>> lot, and everything works fine as long as the interface does not use
>> standard structures (like FILE, custom structures are fine) or objects
>> allocated in the extension is freed in the extension.
>
> Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
> officially supported.
>
> You can compile extensions with a different version of MS VC but it can
> get you in a lot of trouble. Every version of the VS Compiler uses its
> own C Runtime Library (MSVCRT). You can't share some resources like
> allocated memory and FILE* objects between MSVCRTs.
>
> Christian
> 




From jcd at sdf.lonestar.org  Fri May 16 09:41:06 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 16 May 2008 09:41:06 -0400
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
Message-ID: <1210945266.3364.8.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-16 at 06:07 -0700, globalrev wrote:
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
> > globalrev a ?crit :
> >
> > > wassup here?
> >
> > > 7
> >
> > > Traceback (most recent call last):
> > >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > > <module>
> > >     print cust1.getID()
> > > AttributeError: 'NoneType' object has no attribute 'getID'
> >
> > > class customer:
> >
> > 1/ naming convention : class names should be CamelCased
> > 2/ unless you need compatibility with years old Python versions, use
> > newstyle classes
> >
> > class Customer(object):
> >
> > >     def __init__(self, ID, movies):
> > >         self.ID = ID
> > >         self.movies = movies
> >
> > 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
> >
> >      def __init__(self, id, movies):
> >          self.id = id
> >          self.movies = movies
> >
> > >     def getID():
> > >         return self.ID
> >
> > >     def getMovies():
> > >         return self.movies
> >
> > 4/ Python has support for computed attributes, so you just don't need
> > these getters.
> >
> >
> >
> > > import os
> > > import customer
> > > import movie
> >
> > > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > > mv1str = mv1.read()
> >
> > > print mv1str.count(',5,')
> >
> > > cust1 = customer.__init__('12',['1','435','2332'])
> >
> > __init__ is automagically called on instanciation, so you don't have to
> > call it yourself. And FWIW, your __init__ returns None.
> >
> > cust1 = Customer('12', ['1', '435', '2332'])
> >
> > > print cust1.getID()
> >
> > print cust1.id
> 
> 
> what should init return normally? a customer-object?
> 
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
>         return self
> 
> 
> ?

No.  __init__ should not return anything (rather, it should return None,
but it'll do that on its own without you telling it to return anything).
The problem is that you are trying to create an object with __init__,
but that is not what it does.  It *initializes* objects that already
exist.  when you call a class, it creates a new instance using
__new__(), and then initializes it using __init__().  So if you were
really inclined to muck around.  You could do something like

cust1 = Customer.__new__(Customer)
cust1.__init__('12', ['1','435', '2332'])

But that would just be silly.  What you really want is this:

cust1 = Customer('12', ['1','435', '2332'])

which does the same thing.  Don't explicitly call under-under variables
unless you really have to.

Cheers,
Cliff





From kib2 at free.fr  Tue May 20 18:38:29 2008
From: kib2 at free.fr (kib)
Date: Wed, 21 May 2008 00:38:29 +0200
Subject: Processing in Python
In-Reply-To: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <483352e5$0$3438$426a34cc@news.free.fr>

A PyQt4 version here : http://dev.nodebox.net/wiki/Qt , but it's really 
buggy (no one seems to have fixed it till 5 months).

There's even a PyGtk clone of NodeBox here : http://shoebox.sollec.org/

I'll be happy to work on one of these projects, see you :

Kib.



From collinyeung at shaw.ca  Wed May 14 22:36:29 2008
From: collinyeung at shaw.ca (Collin)
Date: Thu, 15 May 2008 02:36:29 GMT
Subject: Accepting text input
In-Reply-To: <mailman.1096.1210734320.12834.python-list@python.org>
References: <72QVj.262833$pM4.115744@pd7urf1no>	<84QVj.133083$rd2.94188@pd7urf3no>	<mailman.960.1210570776.12834.python-list@python.org>	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
Message-ID: <NkNWj.138991$Cj7.33283@pd7urf2no>

Kam-Hung Soh wrote:
> On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:
> 
>> Gabriel Genellina wrote:
>>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> 
>>> escribi?:
>>>
>>>> Collin wrote:
>>>>> I'm pretty new to Python, but this has really bugged me. I can't 
>>>>> find a
>>>>> way around it.
>>>>>
>>>>>
>>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>>
>>>>> Any help would be appreciated. Thanks.
>>>>
>>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>>  No need to apologize...
>>>
>>>> I read the error message just now a bit more carefully, and I tried
>>>> something. I tried defining "yes" as some random numerical value. Then
>>>> when I did:
>>>> (example code)
>>>>
>>>> yes = 123123983 #some number
>>>> test = input("Test test test ")
>>>> if test == yes:
>>>>     print "It worked."
>>>> else:
>>>>     print "failed"
>>>>
>>>> (example code off)
>>>  The usual way for Python<3.0 is:
>>>  answer = raw_input("Test test test ").lower()
>>> if answer == "yes":
>>>      ...
>>>  The input() function evaluates user input as an expression: if he 
>>> types 2+5 the input() function returns the integer 7. I would never 
>>> use input() in a program - it's way too unsafe; use always raw_input 
>>> instead.
>>>
>>
>> If I use it like that, do I have to import anything to have the 
>> .lower() work? And if I do, what does the .lower() signify?
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
> 
> You don't need to import any module to use ".lower()"; it is a method of 
> a string.  raw_input() returns a string, so you can use methods of a 
> string.
> 
> Try the following statement to see what happens:
> "ABCDE".lower()
> 

So the .lower() string method is just to convert the string to lowercase 
letters so that you don't have to type a bunch of if - then statements 
in both cases, I'm assuming?


From gagsl-py2 at yahoo.com.ar  Mon May  5 00:11:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 01:11:02 -0300
Subject: multirhreading&boost.python
References: <1209912974.11364.10.camel@van-dattum>
Message-ID: <op.uanxwo0kx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 11:56:14 -0300, joop renes <jj.renes at hccnet.nl> escribi?:

> i hope this is the right list for the following question of a c++
> hacker,python newbie. i have a library in c++ to which i want to add a
> python GUI and other python stuff.The library has multithreading
> components, while python uses a reference counted memory model. Usually
> mixing reference counting with multithreading is frowned upon, at least
> in the c++ world. what am i to expect in the python world, if i bring
> multithreading c++ into it? just performance penalty or total disaster?
> best regards

Python objects are reference counted, *and* you can have many threads running. This is not a problem in itself; Python has a Global Interpreter Lock (GIL) that ensures that addref/releases are properly handled. Only one thread at a time can execute Python code; but your C++ library can use as many threads as you want - as long as they don't call Python code again without reacquiring the GIL.

-- 
Gabriel Genellina



From bruno.desthuilliers at gmail.com  Wed May  7 17:03:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 14:03:37 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org>
Message-ID: <b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com>

On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
> M?ta-MCI (MVP) wrote:
> > Hi!
>
> >> I don't often feel like using this word
>
> > Look at languages like OCAML or F #
>
> > @-salutations
>
> Well of course, we're all well aware of other languages that allow
> variables to be bound in the middle of an expression.  It's just that
> Python was purposely created without that (mis)feature because it's so
> unclear, and easy to abuse.

This is the same argument that has been used to justify the lack of MI
and operator overloading in Java.

Not that I would support having assignment as expressions in Python
(wouldn't fit the whole design IMHO), but this is still a somewhat
arbitrary design choice, not necessarily a GoodThing(tm) by itself -
well designed expression-based languages have their strength too.


From martin at v.loewis.de  Sat May 10 12:27:45 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sat, 10 May 2008 18:27:45 +0200
Subject: People still using Tkinter?
In-Reply-To: <mailman.906.1210435115.12834.python-list@python.org>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
	<mailman.906.1210435115.12834.python-list@python.org>
Message-ID: <4825cd01$0$14982$9b622d9e@news.freenet.de>

> I am, but "still" isn't the word, I just started.  Good, *complete*
> docs seem to be hard to find, but using a combination of the free
> resources and going back and forth between them seems to work all
> right so far.

IMO, the trick really is to also have a Tk documentation around.
If you need to find out what option is supported by what widget,
there isn't really much point in duplicating that information in
Tkinter, IMO - the Tk documentation has it all.

Regards,
Martin


From alokkat at gmail.com  Wed May 28 20:31:44 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 20:31:44 -0400
Subject: multi dimensional dictionary
In-Reply-To: <g1j436$6i8$02$1@news.t-online.com>
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
	<g1j436$6i8$02$1@news.t-online.com>
Message-ID: <e3a81e680805281731i42f07aalcb806a24eb58df60@mail.gmail.com>

Thanks to all for their kind help and time.

Alok

On Wed, May 28, 2008 at 4:11 AM, Peter Otten <__peter__ at web.de> wrote:

> Gary Herron wrote:
>
> > Alok Kumar wrote:
> >> Dear All,
> >>
> >> I am using dictionary for filling my xpath parsed data.
> >>
> >> I wanted to use in the following manner.
> >>
> >> mydict[index] ["key1"] ["key2"]    #Can someone help me with right
> >> declaration.
> >>
> >> So that I can fill my XML xpath parsed data
> >>
> >> mydict[0] ["person"] ["setTime"] = "12:09:30"
> >> mydict[0] ["person"] ["clrTime"] = "22:09:30"
>
> [I didn't see the original post]
>
> >>> from collections import defaultdict
> >>> def make_inner():
> ...     return defaultdict(lambda: defaultdict(make_inner))
> ...
> >>> mydict = make_inner()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
> defaultdict(<function <lambda> at 0x2b7afd0025f0>, {0:
> defaultdict(<function
> make_inner at 0x2b7afd002578>, {'person': defaultdict(<function <lambda> at
> 0x2b7afd002668>, {'setTime': '12:09:30', 'shoes': defaultdict(<function
> make_inner at 0x2b7afd002578>, {'color': 'bright yellow'})})})})
>
> If that looks too messy, try a subclass:
>
> >>> class Dict(defaultdict):
> ...     def __init__(self):
> ...             defaultdict.__init__(self, Dict)
> ...     def __repr__(self):
> ...             return dict.__repr__(self)
> ...
> >>> mydict = Dict()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict
> {0: {'person': {'setTime': '12:09:30'}}}
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
> {0: {'person': {'setTime': '12:09:30', 'shoes': {'color': 'bright
> yellow'}}}}
>
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
-------------- next part --------------
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From iscaris at hotmail.com  Sun May 18 06:41:19 2008
From: iscaris at hotmail.com (Maese Fernando)
Date: Sun, 18 May 2008 03:41:19 -0700 (PDT)
Subject: Error when calling superclass __init__ method
Message-ID: <a371b239-b22f-4f8c-b34c-b0f6e061add7@24g2000hsh.googlegroups.com>


Hi,

I'm getting an odd error while trying to call the __init__ method of a
super class:

BaseField.__init__(self)
TypeError: unbound method __init__() must be called with BaseField
instance as first argument (got nothing instead)


This is the code:

class BaseField(object):

    def _addFieldsToRec(self, rec, *fields):
        for field in fields:
            self.mfn[field] = rec

    def __init__(self):
        self._addFieldsToRec(1,1)
        self._addFieldsToRec(2, 500,501,502,503,504,505,506,507,508)


class Field(BaseField):
    def __init__(self, value):
        BaseField.__init__(self)      # this seems to be the offending
line.
        self.tag = value


What am I doing wrong?


From castironpi at gmail.com  Wed May 14 19:28:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:28:37 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<mailman.1130.1210789334.12834.python-list@python.org>
Message-ID: <d609d636-7dd3-43df-810b-7188560842ba@d1g2000hsg.googlegroups.com>

On May 14, 1:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwe... at gmail.com> wrote:
> > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> >> "George Sakkis" <george.sak... at gmail.com> wrote in message
> >> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> >> > you can safely ignore its posts.
>
> >> How does it generate text?
>
> > My guess is by inhaling a lot of intoxicants.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> I assumed his message with the subject "bytes1.shuffle()" from a few
> days ago was a glimpse into his source code. ?Or something like it.

I am trying to select a color.  It's color select.py.  Any thoughts?


From xah at xahlee.org  Tue May 20 18:53:04 2008
From: xah at xahlee.org (Xah Lee)
Date: Tue, 20 May 2008 15:53:04 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
Message-ID: <aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>

I offer the python community complete rewrite of the Python doc. The
resulting doc would be one of the best technical writing among Open
Source community's documentations. (a fair verification can be
obtained by polling professional writers and editor community, e.g.
staff writers of Time Mag or other prestigious journals, or tech
writers at Apple or Microsoft or Google.)

Please contact me if interested.

(Otherwise, perhaps someone at google can alot his extra project to
rewrite the python doc. The complaint about python doc has turned up
now and then in the past few years it seems, but always got put down
by python priests)

  Xah
  xah at xahlee.org
? http://xahlee.org/

?



From maxwell.newlands at gmail.com  Thu May 15 09:08:35 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 06:08:35 -0700 (PDT)
Subject: no inputstream?
Message-ID: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>

hey folks,

coming from java, new to python.  i'm trying to port a java app to
python that writes an inputstream to a buffer, then parses the buffer
(specifically, i'm getting ID3 tags from mp3s online).  i understand
that this java approach to the task may not apply to python, but i'm
having trouble finding a working approach in python.

i currently have locations of the mp3s in question as strings, which
works for parsing local files, but gives me a "No such file or
directory" error when it tries to process URLs.  it seems terribly
inefficient to download each mp3 just to get at that small tag data,
and i assume there's a way to do this with file() or open() or
something, i just can't get it to work.

anyone know how i can fix this?  thanks in advance for any help!

best,
max





From mwilson at the-wire.com  Tue May  6 11:04:20 2008
From: mwilson at the-wire.com (Mel)
Date: Tue, 06 May 2008 11:04:20 -0400
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <fvps39$oug$1@aioe.org>

Raymond wrote:

> My other gripe is with the kludgy object-oriented regex functions.
> Couldn't these be better implemented in-line?  Why should I, as a coder,
> have to 're.compile()' when all the reference languages do this at compile
> time, from a much more straightforward and easy to read in-line
> function...

Because compile time doesn't do

    pattern = raw_input ("Pattern, please: ")
    saved_pattern = re.compile (pattern)

        Mel.



From http  Fri May 30 14:17:09 2008
From: http (Paul Rubin)
Date: 30 May 2008 11:17:09 -0700
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
Message-ID: <7xmym7sllm.fsf@ruckus.brouhaha.com>

abhishek <guptaabhishek1983 at gmail.com> writes:
> Hi group, recently my employer asked me too implement encryption/
> decryption for secure data transfer over internet. Problem is that the
> client application is written using C# and the webserver where i need
> to store the information is developed using python.

Use one of the SSL wrappers.  Note that if you're using a recent
Debian distro, make sure to take the latest OpenSSL update since they
had an unbelievably bad screwup that destroyed their versions of
OpenSSL's security for a while.  That applies to all Debian based
distros including Ubuntu, but not to non-Debian derivatives such as
Fedora.


From gherron at islandtraining.com  Thu May 15 13:09:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 10:09:45 -0700
Subject: How do I use the unpack function?
In-Reply-To: <d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
Message-ID: <482C6E59.3020503@islandtraining.com>

John Machin wrote:
> On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Marlin Rowley wrote:
>>     
>>> All:
>>>       
>>> I've got a script that runs really slow because I'm reading from a
>>> stream a byte at a time:
>>>       
>>> // TERRIBLE
>>> for y in range( height ):
>>>         for color in range(4):
>>>             for x in range( width ):
>>>                 pixelComponent = fileIO.read(4)
>>>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE
>>>       
>
> [snip]
> Perhaps the OP might be able to use the Python Imaging Library (PIL)
> instead of reinventing an image-file handler.
>   

Indeed.  That's why my original answer included the line:
    There are probably better ways overall, but this directly answers 
your question.

Other possibilities.

I don't recognize the file format being read in here, but if it is a 
standard image format, the PIL suggestion is a good way to go.

Or, if it is an image of not too enormous size, read the *whole* thing 
in at once. 

Or rather than manipulate the array by carving off 4 bytes at a time, 
just index through it in 4 byte chunks:
  for i in range(width):
      buffer = unpack("!f", pixelComponent[4*i:4*i+4])

Or
  for i in range(0,4*width,4):
      buffer = unpack("!f", pixelComponent[i:i+4])

Or
  Use numpy.  Create an array of floats, and initialize it with the byte 
string, making sure to take endianess int account.  (I'm quite sure this 
could be made to work, and then the whole operation is enormously fast 
with only several lines of Python code and *no* Python loops.

Or
  ...?

Gary Herron

> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From bignose+hates-spam at benfinney.id.au  Mon May  5 18:17:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 06 May 2008 08:17:22 +1000
Subject: License selection for free software (was: ]ANN[ Vellum 0.16: Lots Of
	Documentation and Watching)
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <87ve1se6q5.fsf_-_@benfinney.id.au>

vivainio at gmail.com (Ville M. Vainio) writes:

> Paul Boddie <paul at boddie.org.uk> writes:
> 
> > Anyway, I'm just confirming that I'm clearly not one of the "many"
> > described above. A lot of my own work is licensed under the GPL or
> 
> I guess it's safe to assume that you are not opposed to using code
> based on more liberal license, right? :-)

I'm less inclined to base work on, or contribute to, a work under a
non-copyleft license, because I have less assurance that the code will
remain free for all recipients.

> My point is: GPL is a reason to reject a tool for some

Yes.

> but MIT/BSD never is.

Not true. I, and many others I know, would and have done so.

There's no single free-software license that won't displease some
segment of the free-software community. I think the Vellum project
shouldn't base the selection of license on "do some people dislike
this license?", because the answer is "yes" for all of them.

-- 
 \        "No matter how cynical you become, it's never enough to keep |
  `\                             up."  -- Jane Wagner, via Lily Tomlin |
_o__)                                                                  |
Ben Finney


From umpsumps at gmail.com  Fri May  9 14:40:59 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Fri, 9 May 2008 11:40:59 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
Message-ID: <d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>

On May 9, 1:45 am, cokofree... at gmail.com wrote:
> >>> key = ''.join(sorted(word))
>
> I tend to strip and lower the word as well, otherwise "Hello" and
> "hello" do not compare...depends on what you want though!
> Plus you might get a lot of "word\n" as keys...
>
> My technique is the this way
>
> def anagram_finder(words):
>     anagrams = {}
>     for word in words:
>         word = word.strip()
>         key = ''.join(sorted(word.lower()))
>         anagrams.setdefault(key, []).append(word)
>     return anagrams

What would be the best method to print the top results, the one's that
had the highest amount of anagrams??  Create a new histogram dict?


From inhahe at gmail.com  Fri May 23 15:47:32 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:47:32 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com><mailman.1484.1211483172.12834.python-list@python.org><483659b1$0$11621$607ed4bc@cv.net>
	<mailman.1501.1211543292.12834.python-list@python.org>
Message-ID: <JaFZj.19195$255.19092@bignews8.bellsouth.net>

"""
"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1501.1211543292.12834.python-list at python.org...
Thanks for all the answers and comments.

>math.pi is exactly equal to 884279719003555/281474976710656, which is the 
>closest C double to the actual value of pi

So much for poor old 22/7...

Sam
"""

The biblically correct version:

import math
math.pi = 3











From castironpi at gmail.com  Tue May 13 09:24:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:24:56 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
Message-ID: <60b18173-aad1-4054-b239-74f24166c162@z72g2000hsb.googlegroups.com>

On May 13, 8:17?am, Giuseppe Ottaviano <giu... at gmail.com> wrote:
> On May 13, 2008, at 12:28 PM, dannywebs... at googlemail.com wrote:
>
>
>
>
>
> > Hi - I have a list returned from popen/readlines, and am wondering how
> > to go about iterating over each item which was returned (rather than
> > currently having the whole lot returned).
>
> > so far:
>
> >>>> f=os.open("./get_hostnames").readlines
>
> > returns ['host1 host2 host3 ... hostN\n]'
>
> > i'd like to be in a position to iterate through these, grabbing each
> > host. ?I have played with transmuting to a str, and using split, and
> > this works, but I get the subscript brackets from the list output as
> > expected, as the list output is now a string literal, and this is not
> > what I want - and I think it's a bit long-winded to do a search 'n
> > replace on it - hence why I ask in the subject what's the best way.
>
> >>>> f=str(f)
> >>>> f.split()
> > ["['host1","host2", ... ,"hostN\n']"]
>
> If the file is really big, you may want not to construct an actual ?
> list with all the words, but instead use an iterator. If you define ?
> the function
>
> def ichain(seq):
> ? ? ? ? for s in seq:
> ? ? ? ? ? ? ? ? for x in s: yield x
>
> (which is often useful and I don't think it has been included in ?
> itertools) you can iterate lazily on the file:
>
> hosts = ichain(s.split() for s in f)
> for host in hosts:
> ? ? ? ? # ...
>
> HTH,
> Giuseppe- Hide quoted text -
>
> - Show quoted text -

I am having trouble following, but I am not an always-rightter.  Was
s.split( ) one of the things you wanted to do to a line, and likely a
really common one?  I'm trying to approach problems impractically.

Now of course, if anything else is going on in the program, you will
need separate threads or separate interpreters/processes.  Does Python
meet sufficiencies on threading?  What file do we have to test it on?


From badmuthahubbard at gmail.com  Wed May 21 03:33:34 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Wed, 21 May 2008 10:33:34 +0300
Subject: What is wrong with my Python threading?
In-Reply-To: <37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
Message-ID: <8200bab70805210033s4d27909ar37a18535155429c7@mail.gmail.com>

On Tue, May 20, 2008 at 4:28 PM, castironpi <castironpi at gmail.com> wrote:
> On May 20, 8:19 am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
> wrote:
>> #!/usr/bin/python
>>
>> #why doesn't this run both threads simultaneously?
>> #Thanks for any help.
>> #Chuckk
>>
>> import threading
>> import time
>>
>> def printesc(thrd):
>>     for i in range(10):
>>         time.sleep(1)
>>         print thrd, i
>>
>> def master():
>>     thd1 = threading.Thread(target=printesc, args=(1,))
>>     thd2 = threading.Thread(target=printesc, args=(2,))
>>     thd1.run()
>>     thd2.run()
>>
>> master()
>
> You meant 'thd1.start( )' and 'thd2.start( )'.

So I did.  I was mixing what I read of thread and threading.  I'll
never wander beyond my Python module reference html folder again.
Thanks for your help.

-Chuckk

-- 
http://www.badmuthahubbard.com


From gagsl-py2 at yahoo.com.ar  Tue May  6 00:29:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 01:29:39 -0300
Subject: How to generate binary python?
References: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com>
Message-ID: <op.uaptfpdex6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 19:43:24 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> Hi, i'm comingo from Java and I'm wanting to know what in Python is the
> equivalent to the file.class in java, I am producing some apps that ar  
> not
> open source, so I would like to share only the binaries, Both for Windows
> and for Linux, Can you suggest me anything?

.class files map roughly to .pyc files
Note that Python generates and writes .pyc files automatically when you  
import a module, but not for the main script being executed.
The standard way to generate a binary distribution is using distutils, see  
the Python wiki at <http://wiki.python.org/moin/DistributionUtilities>


-- 
Gabriel Genellina



From ryntech at gmail.com  Sun May  4 18:13:24 2008
From: ryntech at gmail.com (rynt)
Date: Sun, 4 May 2008 15:13:24 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com> 
	<05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>
Message-ID: <134cf259-51e6-40aa-a36d-c12985abc5b6@l28g2000prd.googlegroups.com>

WxWidgets, Tkinter, PyQT are all cross platform.  Also have a look at
http://wiki.python.org/moin/GuiProgramming
for more GUI frameworks.

RCB

>On May 4, 4:59?am, Protected <myshel... at gmail.com> wrote:
> On May 4, 12:18 pm, s0s... at gmail.com wrote:
>
>
>
>
>
> > On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > > I had previously ran the import line. I prepended it to the example
> > > code I'm trying to run every time but it did not help, still nothing
> > > happens. With or without var before 'root'. I'm pasting the code in
> > > IDLE and using Windows XP as written in the first post.
>
> > Tkinter doesn't work if you type the statements in IDLE. I don't
> > remember the specifics of it, but essentially it doesn't work because
> > IDLE is itself a Tkinter app. You have to type it at the Python
> > command line or save it in a file. BTW, if you're on Windows, you
> > should definitely check wxPython. I used to work with Tkinter,
> > struggling with it all the time only to get a lame result most of the
> > time. Then I switched to wxPython, and in the same week I was learning
> > it I did a better GUI than I ever did in Tkinter (with months of
> > work!). I feel it makes it easier to make your program have a better
> > structure and design, and thus lets you focus on the actual task of
> > the program, rather than in the GUI itself. Plus, on Windows, you'll
> > get the widgets to look more natively, like any good quality
> > application there is on Windows.
>
> Ah, but is it cross platform?
>
> (Thanks for letting me know about IDLE.)- Hide quoted text -
>
> - Show quoted text -



From luckyluke56 at gmail.com  Sat May 24 13:51:59 2008
From: luckyluke56 at gmail.com (Sh4wn)
Date: Sat, 24 May 2008 10:51:59 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <9c41796a-995c-4e56-99c1-75c4811b62f5@34g2000hsh.googlegroups.com>

On 24 mei, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?
>
> In Python, the philosophy "we're all consenting adults here" applies.
> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put. Barriers such as enforced "private"
> attributes will only cause resentment when people, despite your
> anticipations, *need* to access them and are then forced to hack their
> way around them.
>
> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore. This is a string
> signal that the attribute is part of the implementation, not the
> interface. The reader is then on notice that they should not rely on
> that attribute; but they are not *prohibited* from using it if
> necessary to their ends.
>
> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?
>
> Perhaps you're confusing the "encapsulation" and "abstraction"
> principles for enforced access restrictions; they're not.
>
> > Will it ever be added to python?
>
> I hope not.
>
> --
> ?\ ? ? ? ? ? ?"Why was I with her? She reminds me of you. In fact, she |
> ? `\ ? ? ? ? ? ? reminds me more of you than you do!" ?-- Groucho Marx |
> _o__) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?|
> Ben Finney

Well for me, it the ideal way to make sure it contains so 'wrong'
data. You can create getter/setters, and in some cases only a getter
and validate the value given by the user. Then you'll not have to
worry about the data in the rest of your class, which makes life a lot
easier IMO.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:11:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:11:21 -0300
Subject: Is there no single/uniform RDBMS access API module for Python ?
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
	<3de8e1f70805112352j341a3cd2o34d0964499e86271@mail.gmail.com>
Message-ID: <op.ua1c871kx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 03:52:59 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> Found that SnakeSQL does implement DB2.0 API. However are there such
> implementations for MySQL ?

MySQLdb

-- 
Gabriel Genellina



From zapwireDASHgroups at yahoo.com  Thu May 22 14:21:46 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 11:21:46 -0700
Subject: Producing multiple items in a list comprehension
Message-ID: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>

Is there an easy way to get a list comprehension to produce a flat list of, 
say, [x,2*x] for each input argument?

E.g., I'd like to do something like:

[ [x,2*x] for x in range(4) ]

...and receive

[ 0,0,1,2,2,4,3,6]

...but of course you really get a list of lists:

[[0, 0], [1, 2], [2, 4], [3, 6]]

I'm aware I can use any of the standard "flatten" bits of code to turn this 
back into what I want, but I was hoping there's some way to avoid the "lists 
of lists" generation in the first place?

A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
do so?

Thanks,
---Joel




From piyush.subscription at gmail.com  Mon May 19 10:01:09 2008
From: piyush.subscription at gmail.com (piyush.subscription at gmail.com)
Date: Mon, 19 May 2008 07:01:09 -0700 (PDT)
Subject: printing class __dict__
Message-ID: <691285ac-b506-4d9a-8a4c-9a7d53dc9438@b9g2000prh.googlegroups.com>

hi,
i am a newbie. so bear wth me
i wrote a program like this
--
class H(object):
 def __init__( self):
  self.data =10
 def e ( self ):
  pass
 def f ( self ):
  pass

class H1(H):
    x2 = 11
    def __init__(self):
        self.x = 10

class details(object):
    def data(self,className):
        print classname.__dict__
        print classname.__name__
        print classname.__bases__

bc = details()
bc.data(H1)

when i run it, i get error like this
NameError: global name 'classname' is not defined

can't i pass 'class' like an 'object'?

any suggestions to access other classes details inside a class?


From davidj411 at gmail.com  Tue May 27 12:00:05 2008
From: davidj411 at gmail.com (David Jackson)
Date: Tue, 27 May 2008 12:00:05 -0400
Subject: convert string number to real number - ValueError: invalid
	literal for int() with base 10: '"2"'
In-Reply-To: <20080228181914.6307257e.darcy@druid.net>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
Message-ID: <491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>

i used the csv module and saved its contents to a list.

['Date', 'No.', 'Description', 'Debit', 'Credit']
['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']


the credit/debit fields are strings.
what should i have done within the CSV module to make numbers appear as
numbers?
how can i remove the quotes to make them numbers? i realize i posted a
solution to this once before (same posting thread) but i am thinking there
is a better method.



On Thu, Feb 28, 2008 at 7:19 PM, D'Arcy J.M. Cain <darcy at druid.net> wrote:

> On Thu, 28 Feb 2008 14:56:10 -0800 (PST)
> davidj411 <davidj411 at gmail.com> wrote:
> > ValueError: invalid literal for int() with base 10: '"2"'
> >
> >
> > here is the question:
> >
> > How can i convert a string number like "2" to a true number that can
> > be added.
>
> You have to get rid of the double quotes first.
>
> --
> D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
> http://www.druid.net/darcy/                |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.
>
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From dotancohen at gmail.com  Wed May 14 14:00:20 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 14 May 2008 21:00:20 +0300
Subject: Python and Flaming Thunder
In-Reply-To: <72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>
References: <mailman.1117.1210772083.12834.python-list@python.org>
	<6908kuF2ud4e1U1@mid.uni-berlin.de>
	<72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>
Message-ID: <880dece00805141100w7599451etfa1646accb2a7063@mail.gmail.com>

2008/5/14  <castironpi at gmail.com>:
> 8x8 is pretty easy to aim for.  Turn on 16x16, and you're the laptop
> to stand on.  FxF?

I'll see your 16x16 and raise you 32x32. Any number is pretty easy to
aim for when one can arbitrarily invent 2nx2n.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From gherron at islandtraining.com  Thu May 29 04:38:37 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 29 May 2008 01:38:37 -0700
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <483E6B8D.6020307@islandtraining.com>

Dark Wind wrote:
> Hi,
>
> Is there any command in Python which gives the code for a function 
> like just typing the name of a function (say svd) in R returns its code.
>
> Thank you

Nope.

> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From Lie.1296 at gmail.com  Tue May 13 10:58:06 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 07:58:06 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au> 
	<482912b7$0$11641$607ed4bc@cv.net>
	<f9e593e2-7b11-4e8f-a604-fbc386cef448@l17g2000pri.googlegroups.com>
Message-ID: <e044ca83-60cb-4cf8-ac75-8b884327d89c@v26g2000prm.googlegroups.com>

On May 13, 9:20?pm, Lie <Lie.1... at gmail.com> wrote:
> On May 13, 11:01?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > Ben Finney wrote:
> > > I think that the idiom
>
> > > ? ? for unused in xrange(10):
> > > ? ? ? ? # do stuff with no reference to 'unused'
>
> > > is quite common. Is that what you're asking about?
>
> > Yes. I was more or less asking about the specific situation of using a
> > for loop to do something X number of times, but I think the more
> > generalized problem that everyone is talking about -- using a counter
> > variable that is never referenced in the loop -- probably puts the point
> > I was trying to make in a better light.
>
> > The reason I even brought this up is because I remember someone saying a
> > while back (probably here on the newsgroup) that the true use of a for
> > loop was to iterate through a sequence (for the purpose of using that
> > sequence), not to do something X number of times. Once they made this
> > comment, I suddenly saw the for loop in a new (and I believe purer)
> > light. That was the first time I realized what it was really meant
> > to do.
>
> > Using something like:
>
> > for unused in xrange(10):
> > ? ? # do stuff 10 times
>
> > suddenly seemed to me like a hackish way to replace
>
> > for (int i=0; i<10; i++) {
> > ? ? // do stuff 10 times;
>
> > }
>
> > Not that I think the above code (C#) looks all that elegant either. But
> > in C# there is a distinction between the above, and this:
>
> > foreach (int i in sequence)
> > ? ? // do something;
>
> > which is more closely related to the Python for loop.
>
> > Now, you could easily make the argument that the Python for loop is a
> > much simpler tool to accomplish *both* of the above, and I suppose that
> > makes sense. Seems a little silly to have two separate for loops to do
> > these things. I just wasn't sure if the "counter" version of the Python
> > for loop was considered slightly unpythonic.
>
> What was unPythonic, I think, as most people would agree, is to use
> for like this:
>
> ?--
> ? ? for i in xrange(len(lst)):
> ? ? ? ? pass
> ?--
>
> In VB, my language before Python, I've never used For Each even for a
> sequence (Array, in VB), it seems too messy back then. Now, with
> Python that only allowed a foreach statement, I realized that I never
> really needed a for i in range(10) at all. Most of the time the places
> where I need to do that is where the code is just a test code that
> loops a certain number of times (with randomized input data), almost
> never (probably never) met that in a real program code. And even in
> some of those cases, the variables are usually used too (as a test
> argument to the function being tested) or for logging purpose.
>
> On May 13, 8:25 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> (snip)
>
> > I use it quite often, especially if I want to implement a fixed number of
> > retries on a communications channel.
>
> > -Larry
>
> That still have semantic meaning: 'tries'. If it was me, I'll go to
> the trouble of giving names, since I would use it for logging or
> informational purpose ('first try' 'second try' 'third try' 'no more
> try').
>
> I've never really met a real "do something n times" case, where the
> variable doesn't hold any semantic meaning that I don't want to use
> and is not a test case.
>
> For me, a _ (or any other dummy variable[1]) is good enough and it's
> easy to change if later I realized that I actually need to use the
> variable. I agree though, that i, j, k for unused name is a bad choice
> because single letter names is in common usage in mathematics.
>
> [1] PEP 8 is useless if a certain code base has other agreed
> convention, as long as the name used for a unused name in certain code
> base is consistent (and probably documented), it never becomes a
> problem.

On my last message, I'm tempted not to say: "We need to have /dev/null
for Python" though I proved to fail.


From msc at es.aau.dk  Wed May  7 04:29:57 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 10:29:57 +0200
Subject: Why don't generators execute until first yield?
Message-ID: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>

Hi!

First a bit of context.

Yesterday I spent a lot of time debugging the following method in a
rather slim database abstraction layer we've developed:

,----
| def selectColumn(self, table, column, where={}, order_by=[], group_by=[]):
|     """Performs a SQL select query returning a single column
|
|     The column is returned as a list. An exception is thrown if the
|     result is not a single column."""
|     query = build_select(table, [column], where, order_by, group_by)
|     result = DBResult(self.rawQuery(query))
|     if result.colcount != 1:
|         raise QueryError("Query must return exactly one column", query)
|     for row in result.fetchAllRowsAsList():
|         yield row[0]
`----

I'd just rewritten the method as a generator rather than returning a
list of results. The following test then failed:

,----
| def testSelectColumnMultipleColumns(self):
|     res = self.fdb.selectColumn('db3ut1', ['c1', 'c2'],
|                                 {'c1':(1, 2)}, order_by='c1')
|     self.assertRaises(db3.QueryError, self.fdb.selectColumn,
|                       'db3ut1', ['c1', 'c2'], {'c1':(1, 2)}, order_by='c1')
`----

I expected this to raise a QueryError due to the result.colcount != 1
constraint being violated (as was the case before), but that isn't the
case. The constraint it not violated until I get the first result from
the generator.

Now to the main point. When a generator function is run, it immediately
returns a generator, and it does not run any code inside the generator.
Not until generator.next() is called is any code inside the generator
executed, giving it traditional lazy evaluation semantics. Why don't
generators follow the usual eager evaluation semantics of Python and
immediately execute up until right before the first yield instead?
Giving generators special case semantics for no good reason is a really
bad idea, so I'm very curious if there is a good reason for it being
this way. With the current semantics it means that errors can pop up at
unexpected times rather than the code failing fast.

Martin


From darcy at druid.net  Fri May  2 11:06:36 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 11:06:36 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <877ieczryn.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
Message-ID: <20080502110636.0841dc73.darcy@druid.net>

On Sat, 03 May 2008 00:44:00 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> > As someone else pointed out, not all the world is Linux.
> 
> It's a good thing I've never implied such to be the case.

You haven't *said* it but you have definitely *implied* it.  Installing
Python in /usr/bin is not common.  It is very specific to your system.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From reid at reidster.net  Mon May 19 20:55:19 2008
From: reid at reidster.net (Reid Priedhorsky)
Date: Mon, 19 May 2008 19:55:19 -0500
Subject: Safely updating master state in SocketServer with ForkingMixIn
Message-ID: <pan.2008.05.20.00.55.19.9461@reidster.net>

Dear all,

I have a TCP server written using SocketServer with ForkingMixIn.
Servicing connections is CPU-bound and can take several seconds.

I now need a way to safely tell the master process to update its state (by
groveling in a PostgreSQL database, potentially for several seconds). How
can I do this safely?

I thought of two ways:

1. Install a signal handler for SIGHUP and update state when that signal
is received.

2. Stop using ForkingMixIn and fork myself, except when "special" requests
come in requesting a state update, which don't fork.

3. Look for the existence of a file after each request, and if it's there
update state.

Option 2 seemed like it would require duplicating a lot of code from
ForkingMixIn, and Option 3 seems kind of lame, so I started down Option 1.
I produced the following code snippets:

   # main loop
   while True:
      server.handle_request()
      global update_required
      if (update_required):
         # update state
         update_required = False

   # signal handler
   def sighup(signum, frame):
      global update_required
      update_required = True

With this code, if the server is idle, SIGHUP causes it to immediately
drop out of handle_request() and execute the state updating block.

Do I have a race condition here? If the master process receives a SIGHUP
after a new connection starts but before a slave process is forked to
handle it, will that connection be messed up (to use highly technical
language)? Otherwise this technique seems compact and elegant.

Are there other options?

Your help would be much appreciated.

Thanks,

Reid


From deets at nospam.web.de  Thu May 29 10:29:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 16:29:56 +0200
Subject: adobe flex; return xml via turbogears/django
References: <mailman.1736.1212070847.12834.python-list@python.org>
Message-ID: <6a7t05F368pqmU1@mid.uni-berlin.de>

Sells, Fred wrote:

> please excuse slightly off-topic; cannot access turbogears mailing list at
> the moment.
> 
> There was an excellent video by James Ward that showed using turbogears to
> return json data to adoble's flex UI.  It simply used
> 
> @expose("JSON")
> def xxxx():
> ...
> return dict(x=1, ...)
> 
> Is there any equivalent for xml, such as
> @expose("XML")
> def ....
> return myElementTreeRoot
> 
> I need to have more attribute data (for a grid) than I can cleanly do in
> json and while pyamf might do the trick, It adds a layer of "magic code"
> that I cannot sell to my team.  Also with xml and json, I can do my UI
> design with the url pointing to a test data file, then build the backend
> to match.
> 
> any ideas?

Why don't you create KID-template like this:

<div py:strip="True">${root}</div>

and in the controller say

@expose("thexmltemplate")
def ...
   return dict(root=myElementTreeRoot)

Diez


From gagsl-py2 at yahoo.com.ar  Mon May 26 20:17:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 21:17:04 -0300
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
Message-ID: <op.ubsdqqznx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 17:44:28 -0300, sebastian.noack at googlemail.com  
<sebastian.noack at googlemail.com> escribi?:

> is there a way to or at least a reason why I can not use tarfile to
> create a gzip or bunzip2 compressed archive in the memory?
>
> You might might wanna answer "use StringIO" but this isn't such easy
> as it seems to be. ;) I am using Python 2.5.2, by the way. I think
> this is a bug in at least in this version of python, but maybe
> StringIO isn't just file-like enough for this "korky" tarfile module.
> But this would conflict with its documentation.

> def create_tar_file(filenames, fileobj, mode, result_cb=lambda f:
> None):
> 	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
> 	for f in filenames:
> 		tar_file.add(f)
> 	result = result_cb(fileobj)
> 	tar_file.close()
> 	return result

It's not a bug, you must extract the StringIO contents *after* closing  
tar_file, else you won't get the last blocks pending to be written.

-- 
Gabriel Genellina



From george.sakkis at gmail.com  Wed May 14 22:47:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 19:47:56 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
Message-ID: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>

I spent several hours debugging some bogus data results that turned
out to be caused by the fact that heapq.nlargest doesn't respect rich
comparisons:

    import heapq
    import random

    class X(object):
        def __init__(self, x): self.x=x
        def __repr__(self): return 'X(%s)' % self.x
        if True:
            # this succeeds
            def __cmp__(self, other): return cmp(self.x , other.x)
        else:
            # this fails
            def __lt__(self, other): return self.x < other.x

    s = [X(i) for i in range(10)]
    random.shuffle(s)

    s1 = heapq.nlargest(5, s)
    s2 = sorted(s, reverse=True)[:5]
    assert s1 == s2, (s,s1,s2)

    s1 = heapq.nsmallest(5, s)
    s2 = sorted(s)[:5]
    assert s1 == s2, (s,s1,s2)


According to the docs, nlargest is equivalent to: "sorted(iterable,
key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
be at least a documentation bug, if not an implementation one.

George


From gagsl-py2 at yahoo.com.ar  Tue May 13 01:05:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 02:05:00 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua2tqmynx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 May 2008 14:42:30 -0300, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> escribi?:

> On 12 mai, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se>  
>> escribi?:
>>
>> > "Write a program that prints the numbers from 1 to 100. But for
>> > multiples of three print "Fizz" instead of the number and for the
>> > multiples of five print "Buzz". For numbers which are multiples of
>> > both three and five print "FizzBuzz".
>>
>> (We used this question last year - some people gave a sensible answer  
>> in less than 5 minutes,  but others did not even know how to start)
>
> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

For some people, "program" == "form with buttons", excluding all else.  
Maybe it's an education problem - "programming in XXX" courses usually  
focus on the XXX language itself, assuming (sometimes wrongly) that the  
student has a "general programming" background. Worse, I've seen a book on  
VB.net (and I think it's not the only one) that is more focused on "how to  
use Visual Studio" than teaching the language itself, so it's not  
surprising that some people may consider "what's the shortcut to [do some  
visual task]" an important "programming skill".

So I think the FizzBuzz problem is a good test to filter out candidates  
based on (lack of) practical programming skills. But I don't like that it  
is still slightly math-biased (our version said: if multiple of 7 OR ends  
in 7 -> replace with the word "Domingo"). I probably would not reject an  
answer like this:

for n in range(1,100):
   if multiple_of_7(n) or ends_with_7(n): print "Domingo"
   else: print n

even if multiple_of_7 or ends_with_7 are incorrect or have some comment  
like "I don't remember how to check this". The overall structure is OK,  
the guy has decomposed the problem into two smaller subproblems, now it's  
time to ask a domain expert about the details... :)
But the poor guy doesn't know that; he's under a lot of stress, nervous,  
only has a few minutes remaining and surely thinks "I *have* to write this  
in full else I won't get the job!"
I would like to write a similar problem without this non-programming  
distracting issues (that is, a problem simple enough to be answered in a  
few minutes, that requires only programming skills to be solved, and  
leaving out any domain-specific knowledge).

-- 
Gabriel Genellina



From jcn-france1972 at pobox.com  Mon May 26 18:39:51 2008
From: jcn-france1972 at pobox.com (Jean-Claude Neveu)
Date: Mon, 26 May 2008 15:39:51 -0700
Subject: Using poplib to parse headers
Message-ID: <E1K0lMR-00011c-7q@elasmtp-galgo.atl.sa.earthlink.net>

Hello,

I am writing a Python program to check email using POP3. I've tried 
the sample code from python.org, and it works great. In other words, 
the code below successfully prints out my emails.

import getpass, poplib, email
M = poplib.POP3('mail.blah.com')
M.user('username')
M.pass_('password')
numMessages = len(M.list()[1])
for i in range(numMessages):
     for j in M.retr(i+1)[1]:
         print j
M.quit()

However, if I understand right, the Python poplib library will also 
parse the email for me so that I can iterate through the headers, 
body, etc, of each message, and use them in my program. I think the 
method I need to use is email.message_from_file, but I'm having 
difficulty getting it to work. Can anyone explain me how I would 
extend the above example to do this?

I tried to do this by using in the i loop the line:

	message = email.message_from_file(j)

but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

Please forgive this very basic question. I do most of my programming 
in PHP and I'm just getting started with Python.

Many thanks,

J-C



From workitharder at gmail.com  Sat May 24 02:12:53 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:12:53 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com> 
	<d8818486-b89c-4faf-8000-5b0ec740d053@w34g2000prm.googlegroups.com>
Message-ID: <3e9098aa-9f0d-4d33-9b08-7dc6cd1b8adc@w8g2000prd.googlegroups.com>

On May 23, 7:00?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 24, 7:14 am, nayden <nay... at gmail.com> wrote:
>
> > the execution fails just after the print statement, and I am not quite
> > sure why is that.
>
> It's often helpful to include the traceback, or at the very least the
> last 3-4 lines of it, as it helps everyone work out the issue you're
> having.
>
> If you're not sure which line in a function is causing the issue, try
> commenting out all but the first, run-and-test, re-add the next, run-
> and-test etc
>
> But the error is most likely this line:
>
> > ? ? i = cPickle.load(str)
>
> cPickle.load unpickles from a file, but here you're handing it a
> string. You want cPickle.loads.
>
> At the interpreter, you can always quickly check these out by looking
> up the docstring via 'help(cPickle.loads)' (or 'cPickle.loads?' if
> you're using iPythhon).
>
> - alex23

It's not a string it's a cStringIO.StringIO, even though his variable
name is confusing.

nayden: 'str' is a built-in variable that is the string type. Try this
for different values of x:
type(x) is str
str(x)
When you override it, it may be confusing down the line.

I'd suggest installing pychecker, which will help you catch errors
like this:
http://pychecker.sourceforge.net/


From arnodel at googlemail.com  Tue May 20 02:43:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 07:43:53 +0100
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
Message-ID: <m2bq318ogm.fsf@googlemail.com>

James A. Donald <jamesd at echeque.com> writes:

> Ben Finney 

> The larger the program, the greater the likelihood of inadvertent name
> collisions creating rare and irreproducible interactions between
> different and supposedly independent parts of the program that each
> work fine on their own, and supposedly cannot possibly interact.
>
>> These errors are a small subset of possible errors. If writing a large
>> program, an automated testing suite is essential, and can catch far
>> more errors than the compiler can hope to catch. If you run a static
>> code analyser, you'll be notified of unused names and other simple
>> errors that are often caught by static-declaration compilers.
>
> That is handy, but the larger the program, the bigger the problem with
> names that are over used, rather than unused.

Fortunately for each file that you group functionality in (called a
'module'), Python creates a brand new namespace where it puts all the
names defined in that file.  That makes name collision unlikely,
provided that you don't write gigantic modules with plenty of globals
in them (which would be very unnatural in Python), and don't use from
mymodule import * too liberally.

Why not download a largish project in Python (a web framework for
instance, since you have a particular interest in this), study the
code and see if your concerns seem founded?

Arnaud

> --
>   ----------------------
> We have the right to defend ourselves and our property, because 
> of the kind of animals that we are. True law derives from this 
> right, not from the arbitrary power of the omnipotent state.

-- 
La propriete, c'est le vol !
                           - Pierre-Joseph Proudhon


From phd at phd.pp.ru  Fri May 30 09:12:22 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Fri, 30 May 2008 17:12:22 +0400
Subject: SQLObject 0.10.2
Message-ID: <20080530131221.GI32657@phd.pp.ru>

Hello!

I'm pleased to announce version 0.10.2, a bugfix release of 0.10 branch
of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.10.2

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.10.1
-----------------

Small Features
~~~~~~~~~~~~~~

* Use VARCHAR(MAX) and VARBINARY(MAX) for MSSQL >= 9.0.

* Run post_funcs after RowDestroySignal.

Bug Fixes
~~~~~~~~~

* Fixed a minor bug in Set column.

* A bug fixed for RowCreatedSignal together with InheritableSQLObject:
  run post_funcs after the entire hierarchy has been created.

* Aggregate functions now honors 'distinct'.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From bborcic at gmail.com  Tue May  6 06:22:31 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 06 May 2008 12:22:31 +0200
Subject: computing with characters
In-Reply-To: <Xns9A90773D0D544duncanbooth@127.0.0.1>
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<Xns9A90773D0D544duncanbooth@127.0.0.1>
Message-ID: <4820319a_7@news.bluewin.ch>

Duncan Booth wrote:
> Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> 
>> The biggest ugliness though is ",".join().  No idea why this should
>> be better than join(list, separator=" ").  Besides, ",".join(u"x")
>> yields an unicode object.  This is confusing (but will probably go
>> away with Python 3).
> 
> It is only ugly because you aren't used to seeing method calls on string 
> literals.

An obviously independent cause of uglyness is the inconsistency of eg
','.split() and ','.join()

Cheers, BB


From cwitts at gmail.com  Wed May 21 04:39:06 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 21 May 2008 01:39:06 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <ea9dfed7-8f33-4f6e-8c6f-7b893f8dc01b@m45g2000hsb.googlegroups.com>

On May 20, 8:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

mov = open(afile)
for i,line in enumerate(mov):
    if not i: # Enumeration starts at zero so it is the first line
        continue # Use continue to just move to the next iteration if
you
                 # don't want/need to do anything
        # or you can do a check for what you were looking for
        if ':' in line:
            break
    # Alternatively you could do it as
    if not i and ':' in line:
        break

    # Perform your normal operations on the file, not exactly clear
what you
    # want to perform


From afrobeard at gmail.com  Fri May 16 07:13:37 2008
From: afrobeard at gmail.com (afrobeard)
Date: Fri, 16 May 2008 04:13:37 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com> 
	<4ba3a7d9-19a8-4463-981c-dea90ee085fc@24g2000hsh.googlegroups.com>
Message-ID: <c3cfa111-1189-4791-9fc8-944f7e6af68c@d19g2000prm.googlegroups.com>

On May 14, 9:13?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Thanks to the all posters. This will be very useful!

No Problem :). Let me know if you need any code snippets.

P.S. I wouldn't mind working with you to prepare introductory material
and examples for beginners if it becomes public property.


From gray.bowman at gmail.com  Fri May 23 08:17:32 2008
From: gray.bowman at gmail.com (gray.bowman at gmail.com)
Date: Fri, 23 May 2008 05:17:32 -0700 (PDT)
Subject: where is the Write method of ElementTree??
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
	<4836709E.6000003@behnel.de>
Message-ID: <95225f2a-b572-40ea-9c38-a82987f0da12@a1g2000hsb.googlegroups.com>

On May 23, 3:22 am, Stefan Behnel <stefan... at behnel.de> wrote:
> gray.bow... at gmail.com wrote:
> > I'm messing around with trying to write an xml file using
> > xml.etree.ElementTree.  All the examples on the internet show the use
> > of ElementTree.write(), although when I try to use it it's not
> > available, gives me ...
>
> >    ElementTree(sectionElement).write("section.xml")
> > TypeError: 'module' object is not callable
>
> I guess you did
>
>     from xml.etree import ElementTree
>
> Then you should do this:
>
>     ElementTree.ElementTree(sectionElement).write("section.xml")
>
> sadly, the module names in ET are upper case and look like classes...
>
> Stefan

That was it!  Thanks to both of you for helping.



From gagsl-py2 at yahoo.com.ar  Fri May  9 02:16:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:16:08 -0300
Subject: Python Math libraries - How to?
References: <c976d662-13c3-44ed-b9bd-67104a0ee63f@m44g2000hsc.googlegroups.com>
	<fv655i$idi$1@aioe.org> <17127534.post@talk.nabble.com>
Message-ID: <op.uavic6d8x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 13:17:51 -0300, delta2 <marc.messina at sbcglobal.net>  
escribi?:

> I am also using Zelle's book to teach myself programming and Python.  I  
> also
> had a problem with " import math ", but the alternative of " from math
> import * "  is working for me.  I don't know why one works and the other
> doesn't.

Note that they do different things. When you execute `import math`, the  
math module is loaded, but the ONLY new name you get is `math`. If you  
want the sqrt function, you have to use math.sqrt(2)
When you execute `from math import *`, the math module is loaded the same  
as above, but ALL the public names defined in that module are now  
available in the current namespace. So the sqrt function is now available  
simply as sqrt

Note that the form `from xxx import *` is intended mainly for usage in the  
interactive interpreter, for testing and playing only. If you use that  
form from a few modules, the namespace becomes too cluttered, then you  
don't know from where some name is coming, and a later import may  
inadvertidely replace previous names.

-- 
Gabriel Genellina



From sharma.mohit80 at gmail.com  Thu May  1 07:58:06 2008
From: sharma.mohit80 at gmail.com (sharma.mohit80 at gmail.com)
Date: Thu, 1 May 2008 04:58:06 -0700 (PDT)
Subject: buy desktop computers
Message-ID: <d2468de7-262e-442c-985f-aa832da21da0@w5g2000prd.googlegroups.com>

HP Pavilion Desktop with 17 inch LCD Model No: 6310,
Compaq Presario Desktop Model No: 3153,
Zenith Desktop Model No: 203L-XIl
latest desktop computer available  please visit -
http://www.homeshop18.com/shop/u/y/c-Computers-Q-and-Q-Peripherals-S-Desktops/Home_Online-clI_2-cI_919-pCI_909-


From http  Wed May  7 02:00:01 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:00:01 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
	<mailman.675.1210104317.12834.python-list@python.org>
Message-ID: <7xej8eirha.fsf@ruckus.brouhaha.com>

"Matt Porter" <mabbikeel at gmail.com> writes:
> > Python's non-GPL license certainly is annoying to some of us.
> I'm intrigued - how can it be annoying?

It means GPL'd contributions can't be included in the main Python distro.


From casey.mcginty at gmail.com  Thu May 15 15:48:06 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Thu, 15 May 2008 09:48:06 -1000
Subject: test
Message-ID: <ae3f58470805151248q5e2ff5dena56acac3ca2b02d5@mail.gmail.com>

test
-------------- next part --------------
An HTML attachment was scrubbed...
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From turian at gmail.com  Sat May 10 03:01:35 2008
From: turian at gmail.com (Joseph Turian)
Date: Sat, 10 May 2008 00:01:35 -0700 (PDT)
Subject: Property in derived class
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
	<7f3a3e02-8207-4661-94fa-48a518720a46@r66g2000hsg.googlegroups.com>
Message-ID: <06653a6f-7bae-4a84-bb62-c8d7e6ec9729@c65g2000hsa.googlegroups.com>

On May 9, 9:05 pm, George Sakkis <george.sak... at gmail.com> wrote:
> Using the overridable property recipe [1],
> [1]http://infinitesque.net/articles/2005/enhancing%20Python's%20property...

Thanks, this is a great solution!

  Joseph


From paul at boddie.org.uk  Fri May  9 11:49:57 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 9 May 2008 08:49:57 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
	<68aqoeF2rue80U1@mid.uni-berlin.de>
	<9a66d295-2d05-455b-a825-dd0c75292917@e39g2000hsf.googlegroups.com>
Message-ID: <990f1ad2-75da-4292-a35f-f97baa9da6b5@m36g2000hse.googlegroups.com>

On 9 Mai, 17:22, spectru... at gmail.com wrote:
> Thanks for the reply.
>
> I've found and installed the package containing pvm3.h. (The file is
> now located under "share/pvm3/include/pvm3.h".) But Pypvm can't find
> it.

There is a pvm-dev package in Ubuntu, but it looks like Fedora employs
a different package layout, since pvm-dev seems to have /usr/include/
pvm3.h instead. See here for more details of the Ubuntu package:

http://packages.ubuntu.com/feisty/i386/pvm-dev/filelist

Had the headers been put in /usr/include, you might have been more
fortunate with the rest of the process.

> Someone recommended that I install the equivalent of what is called
> "build-essential" in Ubuntu. I was told that the equivalent can be
> achieved in Fedora like this:
>
> sudo yum groupinstall "Development Tools" --exclude=systemtap --
> exclude=systemtap-runtime

I can only guess what this is doing, but I imagine that it is indeed
somewhat like the Ubuntu build-essential meta-package (which installs
some compilers and headers).

> I don't quite understand what these packages are supposed to do, but
> they don't seem to help.

I would doubt that the default set of compilers and headers would
include PVM stuff - that's somewhat beyond what most developers would
want.

> Can anyone tell me how to make (the installation program for) Pypvm
> understand where the header file is?

Pypvm looks like it offers the old-style Makefile generation procedure
or the new-style distutils procedure. With the old-style approach, you
could edit the Makefile and add some parameters in various places - I
guess you'd put "-Ishare/pvm3/include" on the end of the CFLAGS
variable definition, and "-Lshare/pvm3/lib" on the end of the LDFLAGS
definition. With the new-style approach, you have to persuade
distutils to pick up similar information - some packages employ
setup.cfg files for this purpose, whereas others make you specify
extra options when running setup.py.

Paul


From deets at nospam.web.de  Thu May  8 11:50:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 17:50:28 +0200
Subject: How to kill Python interpreter from the command line?
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <68glr3F2t3109U1@mid.uni-berlin.de>

spectrumdt at gmail.com wrote:

> Hello.
> 
> I am running Fedora Linux and KDE, using the Konsole command line.
> 
> When coding Python, I regularly make a bug causing my program to not
> terminate. But how do I kill the non-terminating Python interpreter
> without killing the entire Konsole?
> 
> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python. Neither do the "terminate
> task", "suspend task" or "interrupt task" commands (available from
> right-click in Konsole).
> 
> So, can someone please help? How do I kill Python without having to
> restart Konsole?


put it into the background using C-z, and then look for it's pid using ps.
Issue a kill -9 towards it.

For example, I just in the moment use this commandline to do so (for a
certain script named frontend_cherrypy.py:

ps ux | grep frontend | kill -9 `cut -c 5-15`

Diez


From mail at timgolden.me.uk  Thu May 29 09:38:56 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 14:38:56 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483EB1F0.70502@timgolden.me.uk>

[Bizarrely, my mail system seems to be randomly misfiring.
If you've already seen this, please ignore!]

Tim Golden wrote:
Sorry, having seen Roger D's memcached suggestion, I realise I may
have misinterpreted your requirement. I thought that you wanted
a Python interpreter session to share its objects to another window,
hence my IPython suggestion. If you're writing your own console app
and want to share stuff, then there's any number of IPC possibilities.

Roger's already mentioned memcached which I've no more than a
passing knowledge of. But Pyro [1] is often a good bet for these
things, and the pyprocessing [2] module is gaining a fair bit of
traction at the moment. (To name just two out of many).

TJG

[1] http://pyro.sf.net
[2] http://pyprocessing.berlios.de/



From bj_666 at gmx.net  Mon May 12 02:05:14 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 12 May 2008 06:05:14 GMT
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <n_OVj.133864$Cj7.40861@pd7urf2no>
Message-ID: <68q50pF2u2t25U2@mid.uni-berlin.de>

On Mon, 12 May 2008 03:40:03 +0000, Yves Dorfsman wrote:

> Paul Rubin wrote:
>
>> You can just use a variable name than you ignore.  It's traditional to
>> use _ but it's not a special keyword, it's just a another variable
>> name:
>> 
>>    y, _, d, _, _, _, _, _, _ = time.localtime()
> 
> But you still have have a variable that's using memory for nothing. I
> find this unsatisfactory...

Get over it?

Or use `operator.itemgetter()`:

In [36]: operator.itemgetter(0, 2)(time.localtime())
Out[36]: (2008, 12)

:-)

Ciao,
	Marc 'BlackJack' Rintsch


From bruno.desthuilliers at gmail.com  Wed May  7 15:18:36 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 12:18:36 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de> 
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
Message-ID: <efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>

On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
> George Sakkis ha scritto:
(snip)
> > What does it matter if it's a single file or a dozen under a package ?
> > "Installation" for pure Python packages can be as simple as copying
> > the package under any directory in your PYTHONPATH.
>
> well, it doesn't matter if it's a single file or a package, but it
> _does_ matter if you have to put them under the path where python is
> installed because, in a typical shared web hosting environment (such the
> one that i use) you don't have access to system directories.

You *never* have to install anything in the default path - install
your python libs wherever you want, and just make sure this wherever
is in your python path (usually via the PYTHONPATH environment
variable).

> > Check out Mako (http://www.makotemplates.org/), it's pretty powerful
> > and fast.
>
> woudl you suggest mako over cheetah?

As far as I'm concerned, I would.  Now if you're looking for a
somewhat barebone MVC framework, you may want to have a look at
web.py.



From castironpi at gmail.com  Tue May 20 09:35:14 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:35:14 -0700 (PDT)
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
	<g0ttd9$elh$03$1@news.t-online.com>
Message-ID: <9ffb2238-fbb6-463a-8108-2b2c73a7dab4@x41g2000hsb.googlegroups.com>

On May 20, 2:08?am, Peter Otten <__pete... at web.de> wrote:
> notnorweg... at yahoo.se wrote:
> > ?if i want o test:
> > if a == 5 and b ==5 and c==5 ... z==5
>
> > is there some synctactic suagr for this?
>
> > rather than maiking one of my own i mean, something built-in like:
> > if a,b,c... z == 5:
>
> if all(x == 5 for x in a,b,c,...):
> ? ?print "yep"
>
> Peter

>>> a,b,c,d=5,5,5,5
>>> import functools
>>> import operator
>>> myequals= functools.partial( operator.eq, 5 )
>>> map( myequals, ( a, b, c, d ) )
[True, True, True, True]
>>> all( _ )
True


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 05:19:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 11:19:34 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
Message-ID: <48353a94$0$12639$426a74cc@news.free.fr>

Agustin Villena a ?crit :
>> And not that useful - why would one care about the function being
>> defined in class X or Y when one have the exact file and line ?
> 
> I have 3 reasons:
> 
> 1) My developing time is expended running unit tests and browsing
> tracebacks to find which is the real problem. Knowing the offender
> class (instead of the method alone) makes me understand more quickly
> which component of my software is failing.

This is only true when there is an obvious, one-to-one, unambiguous 
relationship between the physical location of the error (file, line) and 
the class of the object the method has been called on. Which is not 
necessarily the case (inheritance, method decoration and monkeypatching 
comes to mind here...).

Also, your above statement seems to imply that component==class, which 
is not the case in Python.

> 2) There are some ocassions where I only have the traceback (e.g. when
> analyzing an app's log) and no inmediate access to teh source code

Ok. But the above still apply...

> 3) And finally, for completeness: If a function is really a method, if
> the traceback show only its name and not the class that defines it,
> for me its a bug, because the method name has no sense out of its
> class.

I'm not sure you really grasp what "methods" are in Python. What you 
define (using the def statement) within a class is function, not a 
method. It only becomes a method when it's looked up on an instance or 
class object, and this 'method' is only a thin wrapper around the 
instance, class and function objects. And FWIW, you don't need to define 
the function within the class to make it a method:

# bar.py
def bar(obj):
   print "function bar.bar called on obj %s" % obj


# foo.py

class Foo(object): pass

# baaz.py
from foo import Foo
import bar

Foo.baaz = bar.bar

def guux(obj):
   print "function baaz.guux called on obj %s" % obj

# main.py
from baaz import Foo
f = Foo()
f.bar()

f.gnix = baae.guux.__get__(f, type(f))
f.gnix()



Not to say that your concerns are pointless, and that things cannot be 
improved somehow, but this is not that trivial, and there may be 
ambuiguities in some not so rare cases.


From gagsl-py2 at yahoo.com.ar  Sun May 25 00:49:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 01:49:20 -0300
Subject: function returns ,
	but variable values has not changed in the interactive prompt
References: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>
Message-ID: <op.ubo00ih3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 16:04:43 -0300, davidj411 <davidj411 at gmail.com> escribi?:

> if you run execfile function to run a python script and that script
> has variables and functions, should't those variable change in the
> interactive prompt too?

Yes, they do:

C:\TEMP>type test.py
a = 123

def foo():
   return "hello"

(enter Python)
py> a = "Old value"
py> a
'Old value'
py> execfile("test.py")
py> a
123
py> foo()
'hello'

-- 
Gabriel Genellina



From nagle at animats.com  Sun May 18 12:42:58 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 18 May 2008 09:42:58 -0700
Subject: Write bits in file
In-Reply-To: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <4830596e$0$34563$742ec2ed@news.sonic.net>

Monica Leko wrote:
> Hi
> 
> I have a specific format and I need binary representation.  Does
> Python have some built-in function which will, for instance, represent
> number 15 in exactly 10 bits?

    The "struct" module will let you format Python data as a binary
object of specified format.  But it doesn't support arbitrary bit-width
fields; integers can be 1, 2, 4, or 8 bytes.

    If you have a space problem, you might use the "struct" module to
convert to a reasonably concise binary representation, then use the
"gzip" module to compress the file down further.

					John Nagle


From afrobeard at gmail.com  Tue May 13 18:57:56 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:57:56 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <dc4255fc-798b-419d-8fff-5965cf9b8c0a@k13g2000hse.googlegroups.com>

If I were you, I'd show them actual code and how easy it is to get
things done. Showing them how to implement a GTalk Bot[http://
code.google.com/p/pygtalkrobot/] or how to build simple arcade games
with PyGame[http://www.pygame.org/news.html] would harbor much more
interest in my opinion because it'll show them their own power. There
may be some people who oppose this approach under the pretext that
students taking introductory programming courses should be taught C
because it incorporates the discipline that is much needed if they
want to become hard core CS researchers.

Anyways something that you can show and they will like is Frets On
Fire : [http://fretsonfire.sourceforge.net/]. Plus Pixar uses Python
in its rendering pipeline [Linux Mag July 2007].

My 0.02 Republican Credits

On May 13, 10:10?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi



From conrad at lewscanon.com.invalid  Fri May 30 19:11:01 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Fri, 30 May 2008 19:11:01 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <op.ubzgobgsut4oq5@pandora.alfanett.no>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
Message-ID: <v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>

John Thingstad wrote:
> Perl is solidly based in the UNIX world on awk, sed, bash and C.
> I don't like the style, but many do.

Please exclude the Java newsgroups from this discussion.

-- 
Lew


From mcrobertson at hotmail.com  Tue May  6 18:36:35 2008
From: mcrobertson at hotmail.com (Michael Robertson)
Date: Tue, 06 May 2008 15:36:35 -0700
Subject: open filename with spaces in path
Message-ID: <fvqmhu$2u1$1@skeeter.ucdavis.edu>

I'm having trouble opening a file in linux, whose path has spaces in it.

$ mkdir my\ test
$ echo test > my\ test/test.txt
$ python

 >>> open('./my test/test.txt')
Exception
 >>> open('./my\\ test/test.txt')
Exception

but yet...

 >>> import os
 >>> os.chdir('./my test')
 >>> open('./test')

works just fine.


From lucaspm at dcc.ufba.br  Thu May  8 09:50:07 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Thu, 8 May 2008 10:50:07 -0300
Subject: "prove"
Message-ID: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>

Hello,
How could I "prove" to someone that python accepts this syntax using
the documentation (I couldn't find it anywhere):
classname.functionname(objectname)


From darcy at PyGreSQL.org  Wed May 21 13:19:11 2008
From: darcy at PyGreSQL.org (D'Arcy J.M. Cain)
Date: Wed, 21 May 2008 13:19:11 -0400
Subject: No subject
In-Reply-To: <338512.44068.qm@web39704.mail.mud.yahoo.com>
References: <338512.44068.qm@web39704.mail.mud.yahoo.com>
Message-ID: <20080521131911.9d3b2056.darcy@PyGreSQL.org>

On Wed, 21 May 2008 09:21:05 -0700 (PDT)
ahmed khattab <ahmed_kh1987 at yahoo.com> wrote:
> unsubscribe me form python list plz

Please use the admin interface that you used when you subscribed:

http://mail.python.org/mailman/listinfo/python-list


-- 
D'Arcy J.M. Cain
PyGreSQL Development Group
http://www.PyGreSQL.org


From pataphor at gmail.com  Mon May 19 08:48:03 2008
From: pataphor at gmail.com (pataphor)
Date: Mon, 19 May 2008 14:48:03 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
Message-ID: <20080519144803.14d3569a@hyperspace>

On Mon, 19 May 2008 06:29:18 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> Maybe you could be more specific? Various "positions" I've
> taken in all this may well be untenable, but I can't think
> of any that have anything to do with whether the data should
> be a single list instead of a list of lists.

What's 'untenable' (hey, I tried to get away with a smiley, remember)
is that a matrix is a list of rows. Suppose you do the transpose trick
with the zip(*M) routine, now it's a list of columns. Both views are
equal, there is no getting around the fact that you're holding an
unnatural predisposition towards seeing the matrix as a list of rows,
which it is most definitely not ...

I was holding the brakes for this argument because I realize it's
intuitive and also because Gabriel seems to want a list stay a list if
he assigns something a list. But that's untenable too. Suppose you
assign a column to a list? The list is torn to shreds and placed over
multiple rows.

> (The only way I can parse this to make it relevant is to
> assume that the position you're referring to is that a
> list of lists is better than a single list. If so: First, I
> haven't said that it was. Second, saying "B is untenable"
> is not much of an answer when someone asks why you
> say A is better than B.)

Yes, it was not much of an answer but I was afraid of ending up in
this quagmire. I now see that it is unavoidable anyway if I want to
explain myself. Why couldn't you just see it the same way as me and
leave it at that without waking up all the creatures of hell :-)

> >And to address an 
> >item in a matrix costs two lookups, row and column, while an array
> >needs only one. 
> 
> The phrase "premature optimization" springs to mind.

Well, I really liked your  slicing idea ...

> This is _Python_ we're talking about. Supposing you're right that
> doing two lookups _in Python_ is faster than doing one lookup
> plus the calculuation col + row*width _in Python_, it can't
> make enough difference to matter. In the sort of application I
> have in mind things already happen "instantaneously".

The computation is almost certainly faster. Lookups are expensive.
However I concede the point because we're not supposed to worry about
such stuff. But it *is* a simpler format.

> The point is not to improve on NumPy. Trying to improve on
> NumPy in pure Python code would be silly - if I wanted
> optimized large matrices I'd _use_ NumPy. The point is just
> to give a simple "intuitive" way to manipulate rows and
> columns in small matrices. 

Yes, me too. This is all about intuition.

> So I'm not looking ahead to the future, things are not
> scalable? The thing is not _supposed_ to scale up to
> large matricies. If a person were dealing with large
> matricies then almost all of it would need to be
> rewritten (and if a person were dealing with really
> large matrices then trying to do the thing in pure
> Python would be silly in the first place, and insisting
> on being able to write things like "m.row[0] =
> m.row[1] + m.row[2]" could very well be a totally
> wrong approach to begin with - I'd figure out the
> operations I expected to need to do and write functions
> to do them.)

The reason why I am interested in this is that since I was writing
sudoku algorithms some time ago I have been looking for ways to interact
with data according to different views. I want the data to update even
when I have made changes to them according to another view. In my case
things are even more complex than they are with matrices because I
tend to view sudoku as subcases of binary cubes. Imagine a 3d 9*9*9
chessboard and try to place 81 non-threatening rooks in it. This is not
quite a solution to a sudoku but every sudoku is also a solution to this
problem. 

One of the solution strategies I thought of was forgetting about the 3d
binary cube's content at all, and just update row, column and file
totals (I start with a 'filled' cube and wipe away fields that are
covered by the 'rooks') to drive the optimization. Somehow this seems
possible even though I do not use the cube itself anymore. It just
exists as a figment of my imagination but still it defines the context.

I hope you understand how this was driving me crazy and why I would be
more than happy to return to a safe and sound, actually 'existing' cube,
if only there was a way to access rows, columns and files (for example
sum their elements) as shared data. In the end I realized that
everything I was doing was an abstraction anyway and if that is the
case why not use the simplest possible representation for the data and
let any matrices, rows, columns, files, cubes and so on exist somewhere
higher up in the levels of abstraction of the code.

> Really. In one of the intended applications the matrix
> entries are going to be home-made Rationals. Just
> adding two of those guys takes a long time. It's
> still more than fast enough for the intended application,
> but [oh, never mind.

Too late :-)

> Sorry about the argumentative tone - I _would_ like
> to know which "untenable position" you're referring to...

No, it's no problem. Thanks again for bringing this up. Once I overcame
my initial resistance to bringing up all this old (for me) issues I was
more than happy to share intuitions. I hope this somehow results in a
shared data type. Even just a matrix_with_a_view would be very nice.

P.


From torriem at gmail.com  Mon May 19 16:06:34 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 19 May 2008 14:06:34 -0600
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
Message-ID: <4831DDCA.2050005@gmail.com>

sturlamolden wrote:
> Back in the 'old days' of Unix, programs tended not to be small, could
> only do one thing, and did it well. They had  no gui, and all
> interaction came from command line options. The programs were invoked
> from the command line, and input and output were piped from one
> program to another (input on stdin, output on stdout).

And of course Python is perfect in this area.  A great example is found
here:

> <snip>
> To answer your question: I only add GUIs when I have to. But because
> it seems that people are becoming computer illiterate, incapable of
> using a keyboard, and only comfortable with a certain point-and-click
> input device, it tends to be most of the time now.

Python is excellent for gluing together components with a GUI.  This
preserves the modularity, diversity, functionality, and the ability to
strings things together, but allows a nice easy way to interact with it.
 A great example is a GUI to drive ffmpeg or any number of transcoding
pipelines.  Command line switches are powerful but confusion, and well
beyond my memory.  Yet I prefer transcoders to work this way because I
can string them together in different ways.  Using wxPython or GTK or
PyQT is ideal for bringing these tools together in a useful way.  The
perfect example of how a GUI should function.


From mensanator at aol.com  Sun May 18 20:36:54 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 17:36:54 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com> 
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
Message-ID: <c8cff41d-9221-4044-a442-14fa8935387d@d1g2000hsg.googlegroups.com>

On May 18, 7:25?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Sun, 18 May 2008 16:17:55 -0700 (PDT)
>
> Mensanator <mensana... at aol.com> wrote:
> > I see no need for GUI in any of these applications.
>
> Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)
>
> Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)

I see Python as the successor to Turbo Pascal - the DOS
version before Borland fucked it up by making it a GUI IDE.


From cmgui2 at gmail.com  Thu May 22 12:14:54 2008
From: cmgui2 at gmail.com (cm_gui)
Date: Thu, 22 May 2008 09:14:54 -0700 (PDT)
Subject: Python is slow
Message-ID: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>

Python is slow.    Almost all of the web applications written in
Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
Google Apps is not faster.   Neither is Youtube.
Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
than Python.
Okay, they probably use caching or some code compilation -- but Google
Apps and those Zope sites probably also use caching.

I've yet to see a web application written in Python which is really
fast.


From ghirai at ghirai.com  Mon May 19 19:44:50 2008
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 20 May 2008 02:44:50 +0300
Subject: Newbie: Keep TCP socket open
In-Reply-To: <D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<mailman.1364.1211234091.12834.python-list@python.org>
	<D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
Message-ID: <20080520024450.4a2bd270.ghirai@ghirai.com>

On Mon, 19 May 2008 23:50:50 +0100
"Alan Wright" <alan.wright at volubill.com> wrote:

> Ghirai,
> Scapy does the same, only it sends RST and not FIN, so still no help
> 
>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
> 
> Only have windows at the moment sadly.
> 
> Alan
> 

Are you sure there's no firewall or something else between you and the
remote host?

Because i just tried that command with scapy and it didn't send any other packets
except what it was told (1 packet with SYN flag set).

I haven't tried on windows though.

-- 
Regards,
Ghirai.


From george.sakkis at gmail.com  Thu May 15 08:40:28 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 15 May 2008 05:40:28 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
Message-ID: <55de611d-e484-4373-a485-35925a68919c@8g2000hse.googlegroups.com>

On May 15, 8:27?am, globalrev <skanem... at yahoo.se> wrote:
> i have a big collection of .txt files that i want to open and parse to
> extract information.
>
> is there a library for this or maybe even built in?

This has a lot to do with how well-structured are your files and what
kind of information you hope to extract (shallow or deep). NLTK might
be a good starting point: http://nltk.sourceforge.net/

George


From fuzzyman at gmail.com  Mon May 19 08:37:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Mon, 19 May 2008 05:37:17 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <3f8cbc1a-69af-4b75-bbf6-c9f21689974e@f36g2000hsa.googlegroups.com>

On May 19, 8:32 am, sandeep <shiningsa... at gmail.com> wrote:
> hi all
>
> i am very much a newbie to python but has some experience of
> development.i am trying to write a script which will loop through the
> outlook 2003 inbox and save the email data in an simple data.html page
> and save all the attachments in a folder name emails.after some
> initial struggling i am able to write this script.but now i want to
> create the exe file of this script.i have used py2exe for this job and
> created the exe. but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here. i am using python2.5 and is using
> py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
> service pack2.
>
> thanks and reagrds
> sandeep kumar sharma


You'll need to post the actual errors you get for people to be able to
help. You might find posting to the py2exe mailing list useful.

All the best,


Michael Foord
http://www.ironpythoninaction.com/


From jkrukoff at ltgc.com  Thu May 15 11:06:32 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 09:06:32 -0600
Subject: no inputstream?
In-Reply-To: <974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>
Message-ID: <002c01c8b69d$438fd700$c31ea8c0@naomi>

> -----Original Message-----
> From: python-list-bounces+jkrukoff=ltgc.com at python.org [mailto:python-
> list-bounces+jkrukoff=ltgc.com at python.org] On Behalf Of max
> Sent: Thursday, May 15, 2008 8:02 AM
> To: python-list at python.org
> Subject: Re: no inputstream?
> 
> On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
> > On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> >
> > > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > > i currently have locations of the mp3s in question as strings, which
> > > > works for parsing local files, but gives me a "No such file or
> > > > directory" error when it tries to process URLs. ?it seems terribly
> > > > inefficient to download each mp3 just to get at that small tag data,
> > > > and i assume there's a way to do this with file() or open() or
> > > > something, i just can't get it to work.
> >
> > > You can use `urllib2.urlopen()` to open URLs as files. ?But if you
> deal
> > > with ID3 V1 tags you'll have to download the file anyway because those
> are
> > > in the last 128 bytes of an MP3 file.
> >
> > > Ciao,
> > > ? ? ? ? Marc 'BlackJack' Rintsch
> >
> > Just don't import time. ?What would you do with an autolocking timer,
> > such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> > of a lady.
> 
> thanks guys.  i guess i just figured there'd be a way to get at those
> id3 bytes at the end without downloading the whole file.  if java can
> do this, seems like i should just stick with that implementation, no?
> --
> http://mail.python.org/mailman/listinfo/python-list

First off, ignore castironpi, it's a turing test failure.

Second, I'm curious as to how Java manages this. I'd think their streams
would have to be pretty magic to pull this off after the HTTP connection has
already been built.

Anyway, as I see it, this is more of a HTTP protocol question. I think what
you need to do is set the HTTP Range header to bytes=-128, see the urllib2
documentation for how. It's not that hard. Only down side is that not all
HTTP servers support the Range header, and it's an optional part of the HTTP
spec anyway. As far as I know it's the only way to get partial transfers,
though.

Also, are you sure you're dealing with v1 tags and not v2? Since v2 tags are
stored at the beginning (or sometimes end with v2.4) of the file. You might
be better off just opening the file with urllib2 and handing it off to
whatever id3 tag reading library you're using. As long as it's reasonably
smart, it should only download the part of the file it needs (which if the
tag happens to be v1, will be the whole file).

I'd love to know how Java handles all that automatically through a generic
stream interface, though.
--
John Krukoff
jkrukoff at ltgc.com



From gagsl-py2 at yahoo.com.ar  Sun May 25 22:51:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 23:51:48 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>
Message-ID: <op.ubqp8mn1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 19:46:50 -0300, Casey McGinty <casey.mcginty at gmail.com> escribi?:

> On Sat, May 24, 2008 at 2:11 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
> wrote:
>
>> > 2. In the top of your package directory it is typical to have a module
>> name
>> > '_package.py'. This is ideally where the main command line entry point
>> for
>> > the package code should be placed.
>>
>> Why the underscore? And I usually don't put executable scripts inside a
>> package - I consider them just libraries, to be imported by other parts of
>> the application.
>> It's easier to test too when your tests *and* the application code are
>> external to the package itself.
>>
>
> Ok, guess using the '_package' name is not very common. I saw it used by the
> dbus module. My whole concern here is that using a script will fragment your
> application code across the file system. I would prefer to have it all in a
> single spot. So I still like they idea of keeping most of application code
> (argument parsing, help output, initialization) inside of the package. The
> '_' should indicate that any other modules using your package should import
> that module.

Not only using _package isn't very common - it goes against the general rule (this one very well established) that names with a single leading _underscore are private (implementation details). So I would *not* expect to import _package as a rule.
I don't think splitting the application in two or more parts ("fragmentation" as you call it) is a bad thing by itself; the package will likely appear under some-python-directory/site-packages/your_package_name (where anyone would search for it) and the executable scripts on /usr/bin (where anyone would likely search for it too).

-- 
Gabriel Genellina



From tobik0000 at vp.pl  Fri May  9 12:56:11 2008
From: tobik0000 at vp.pl (tobik0000 at vp.pl)
Date: Fri, 9 May 2008 09:56:11 -0700 (PDT)
Subject: BEST VIDEO
Message-ID: <28009d96-3e71-4a6b-bf57-d1e2fd689c22@x41g2000hsb.googlegroups.com>

Best Video!!!! sexi !! *-*!!
http://rozrywka.yeba.pl/show.php?id=2073
http://rozrywka.yeba.pl/show.php?id=2079


From gagsl-py2 at yahoo.com.ar  Sun May  4 20:14:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 21:14:15 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
Message-ID: <op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 12:58:25 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:

> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>
>> I thought that it would be very nice if the built-in sum() function used
>> this algorithm by default.  Has this been brought up before?  Would this
>> have any disadvantages (apart from a slight performance impact, but
>> Python is a high-level language anyway ...)?
>
> There's a thread you might find interesting:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a
>
> In that thread I suggested that Python ought to implement sum by adding
> together each pair of values, then each pair of results and so on. This
> means that for input values of a similar magnitude the intermediate results
> stay balanced. The implementation doesn't actually do all the first level

Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement. But if you know that you're adding floating point numbers you can use whatever algorithm best fits you. Or use numpy arrays; I think they implement Kahan summation or a similar algorithm.

-- 
Gabriel Genellina



From nik600 at gmail.com  Mon May 26 06:45:26 2008
From: nik600 at gmail.com (nik600)
Date: Mon, 26 May 2008 12:45:26 +0200
Subject: integration with browser
Message-ID: <9469c3170805260345s7c8ab68fyedf700bad96dc57e@mail.gmail.com>

Hi to all

i'd like to create a window that integrates a browser control, the
browser control must support html, javascript and css.

Is possible to include something that uses the same engine of firefox?

Thanks to all in advance

-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From rupole at hotmail.com  Tue May 13 18:51:23 2008
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 13 May 2008 18:51:23 -0400
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <g0d61d$52u$1@ger.gmane.org>


<yguan08 at gmail.com> wrote in message
news:411ca062-faa9-4635-8d69-90e69f465729 at z72g2000hsb.googlegroups.com...
>I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
>
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> fsize = os.path.getsize(fullpath)
>
>
> WindowsError: [Error 206] The filename or extension is too long:
>
> The same thing with os.stat(fullpath).
>
> I tried using the relative path, but it does not work with the message
> fname not found.
>
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)
> filesize = os.path.getsize(fname)
>
> Is there a walk around of this?

You need to use the '\\?\UNC\' prefix and specify the path
in unicode (Python 2.5 and up).

            Roger






From aaron.watters at gmail.com  Fri May  2 10:56:20 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Fri, 2 May 2008 07:56:20 -0700 (PDT)
Subject: Cookie Confusion - How to Set a Cookie
References: <588d6a6c-0080-48a4-b768-e2c5ef551790@s50g2000hsb.googlegroups.com>
	<cc4194a8-ca9f-4e91-a67d-8096d717e165@b64g2000hsa.googlegroups.com> 
	<bb13634a-ff00-49c1-b07b-34ea4dd448d7@a70g2000hsh.googlegroups.com> 
	<94d81004-fc6d-4ff9-9500-143864a6d7a7@f63g2000hsf.googlegroups.com> 
	<eb94abcb-3172-458c-beba-65680b307818@b64g2000hsa.googlegroups.com>
Message-ID: <7fdb3e13-392d-4b83-83f6-ef554110d8e8@x41g2000hsb.googlegroups.com>

On May 1, 9:02 am, cbh... at gmail.com wrote:
> On Apr 29, 3:35 pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
>
>
>
> > > Thanks for the code, Aaron.  I will give it a try.
>
> > > I've been reading some more about cookielib and am not sure whether I
> > > should use Cookie or cookielib.  This is what I want to do:  a user is
> > > going to login.  Upon a successful login, I want to write their name
> > > and date/time of visit to a cookie file. Which is the correct python
> > > module to use?
>
> > Cookie does parsing and generation of cookie strings
> > for server-side applications like your CGI script.
>
> > The cookielib module
> > is designed for either implementing a client like a web browser
> > or emulating a client/browser (for web scraping, for example).
>
> > I think you want to use Cookie.
> > The distinction could be made clearer in
> > the docs, imho.
>
> > Also, when you say "write the cookie file" I think you mean
> > "store the cookie to the client browser".  This should happen
> > automatically when you send the cookie header to the client
> > correctly (if the client is configured to cooperate).
>
> >   -- Aaron Watters
>
> > ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=default+does+n...
>
> Sorry for the slow replies.  I've been in & out with a sick child.
>
> I'm used to my javascript cookies.  They are automatically written to
> a cookie.txt file in a .mozilla dir under my user.  When I say to
> 'write the cookie file' this is what I was referring to.  I was
> expecting my python cookie to automatically get written to the same
> file.  I have't seen this happen yet.

Hmmm.  I don't know how cookies are stored on the client.
I recommend using the standard cgi debug
environment dump after setting
a cookie to see if the cookie is coming back to the server.
If it is not something is wrong -- you are setting it incorrectly,
or the server or client is blocking the cookie.

Note if you are testing on one machine: some browsers
and servers have by default
special security restrictions on
"localhost" loopbacks -- it may be that this is causing
either the server or the client to ignore the cookie.

  -- Aaron Watters
===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=cooked


From inhahe at gmail.com  Wed May 28 05:36:07 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 28 May 2008 05:36:07 -0400
Subject: Problem with py2exe
References: <114d8694-0d1d-4917-809d-a3d7b6443487@j33g2000pri.googlegroups.com>
Message-ID: <tG9%j.82625$%15.73337@bignews7.bellsouth.net>

i used py2exe with python 2.5 and it worked fine just the other day. 
py2exe-0.6.6.win32-py2.5.exe was the download filename.

<subhabrata.iisc at hotmail.com> wrote in message 
news:114d8694-0d1d-4917-809d-a3d7b6443487 at j33g2000pri.googlegroups.com...
> Dear Members of the group,
> py2exe does not seem to be integrating with 2.5 or later versions.
> I was trying to run it but requested only for 2.3.
> How can I run it?
> If any one can kindly help.
> Regards,
> Subhabrata Banerjee. 




From efurman at admailinc.com  Fri May 16 14:46:54 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Fri, 16 May 2008 10:46:54 -0800
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482DD69E.6030303@admailinc.com>

Johny wrote:

>Is there a module for reading/modifing db files from Python?
>Thanks for help
>B.
>--
>http://mail.python.org/mailman/listinfo/python-list
>  
>
I'm switching my company's software base over from FoxPro 6 to Python.  
As part of that effort I have written (and am still enhancing :) a 
dbf.py module which reads/writes both dBase III and FoxPro tables. 

Index files are not supported, but the table can be sorted by any 
combination of fields after being opened. 

dBase III table/memo support is complete, but FoxPro field types 
Currency, Double, General, and Picture are not supported and those 
fields are stripped out when opened, and will not be in any saved 
version of that table.  At this point, the dbf file itself is read into 
memory, all updates are held in memory, and the table is only written to 
disk when the Save method is called.

Record navigation can be sequential or random, and Top, Bottom, Next, 
and Previous are supported.

Searching is supported, using (or not) deleted records is supported, 
adding and deleting fields is supported, saving as a csv file, and more.

Let me know if you'd like the module.  Hope this helps.

Sample session follows...

 >>> import dbf
 >>> table = dbf.DbfTable('newtable','name C(10), age N(3.0), wisdom M')
 >>> print table

        Table: newtable.dbf
        Type:  dBase III Plus
        Last updated:  2008-05-16
        Record count:  0
        Field count:   3
        Record length: 24

        --Fields--
        name C(10)
        age N(3.0)
        wisdom M(10)

 >>> table.Append()
 >>> table.name = 'Ethan'
 >>> table.age = 37
 >>> table.wisdom = 'Python rules!'
 >>> table.Scatter()
{'age': 37, 'name': 'Ethan', 'wisdom': 'Python rules!'}
 >>> table.GetField('name')
'Ethan'
 >>> table[0]
 Ethan      37         1
 >>> record = table[0]
 >>> record.name
'Ethan'
 >>> record.wisdom
'Python rules!'
 >>> record.age = 40
 >>> record
 Ethan      40         1
 >>> table[0]
 Ethan      40         1
 >>> table.Append({'name':'Lori', 'age':45, 'wisdom':'happy gardens make 
a happy wife'})
 >>> table.Scatter()
{'age': 45, 'name': 'Lori', 'wisdom': 'happy gardens make a happy wife'}
 >>> for record in table:
...   print record.name, record.wisdom
...
Ethan Python rules!
Lori happy gardens make a happy wife
 >>>




From kyosohma at gmail.com  Mon May 19 10:14:00 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 07:14:00 -0700 (PDT)
Subject: distutils directory problem
References: <g0q3nr$iah$1@aioe.org>
Message-ID: <5ed44048-1f13-4972-9aaf-8f3e80aec0a4@8g2000hse.googlegroups.com>

On May 18, 3:31?pm, Martin Manns <mma... at gmx.net> wrote:
> Hi,
>
> I have the following problem with the distutils package:
> (I have now spent hours reading and searching the manuals and tutorials,
> and I am still stuck.)
>
> I have a working directory
> ~/pyspread
> in which my libraries are situated and two icons directories
> ~/pyspread/icons and ~/pyspread/icons/actions
>
> Now I would like to create a setup.py file inside my ~/pyspread
> directory that installs my .py modules in .../site-packages/pyspread
> and the icons in appropriate sub-folders and adds pyspread.pth to
> .../site-packages so that .../site-packages/pyspread is in the
> PYTHONPATH.
>
> However, my setup.py puts everything ?(including .pyc files) into
> site-packages *and* into the sub-folders. What am I doing wrong?
>
> I am looking for a platform-independent solution. Currently, I am using
> python 2.5 on Linux.
>
> Here my setup.py
>
> #!/usr/bin/env python
>
> from distutils.core import setup
> setup(name='pyspread',
> ? ? ? version='0.0.7',
> ? ? ? description='A spreadsheet that accepts a pure python expression in each cell.',
> ? ? ? license='GPL v3 :: GNU General Public License',
> ? ? ? classifiers=[ 'Development Status :: 3 - Alpha',
> ? ? ? ? ? ? ? ? ? ? 'Intended Audience :: End Users/Desktop',
> ? ? ? ],
> ? ? ? author='Martin Manns',
> ? ? ? author_email='mma... at gmx.net',
> ? ? ? url='http://sourceforge.net/projects/pyspread/',
> ? ? ? packages=['pyspread'],
> ? ? ? package_dir={'pyspread': '.'},
> ? ? ? scripts=['pyspread.py'],
> ? ? ? py_modules=['pyspread.mainapp', 'pyspread.pysgrid', 'pyspread.mygrid','pyspread.icontheme'],
> ? ? ? package_data={'pyspread': ['icons/*.png', 'icons/actions/*.png' ,\
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?'test.pys', 'test.csv', 'test2.csv', \
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?'README', 'COPYING']},
> )
>
> Thanks in advance
>
> Martin

I highly recommend re-posting this to the distutils group. They have
some excellent people over there that can probably tell you quite
quickly what the issue is:

http://mail.python.org/mailman/listinfo/distutils-sig

Mike


From 42flicks at gmail.com  Tue May 13 06:30:44 2008
From: 42flicks at gmail.com (Mike)
Date: Tue, 13 May 2008 22:30:44 +1200
Subject: feedparser
Message-ID: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>

Hello,

I'm trying to use the feedparser module (http://www.feedparser.org/).

Is it possible to use this without running the setup program?

I don't see why not, seems like I'm missing something obvious.

My directory structure is:

myprogram.py
    /feedparser
        /feedparser.py

I know I can install the module in the modules directory but would like to
avoid this for two reasons: I'm only using it for the one project so would
like to keep it seperate, and if I move to a shared host I may not be
allowed to install additional modules (not sure if this is correct though).

I've tried:

import feedparser

import feedparser.feedparser

from feedparser import feedparser

What am I doing wrong? :)

Cheers!
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From wicijowski at gmail.com  Mon May 19 09:01:03 2008
From: wicijowski at gmail.com (janislaw)
Date: Mon, 19 May 2008 06:01:03 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <03a01d74-d38c-4963-b6dd-cdfed3831a00@j22g2000hsf.googlegroups.com>

On May 19, 12:20?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

- Programs creating C and VHDL source files
- Scipy scripts generating charts

Jan Wicijowski


From gandalf at shopzeus.com  Fri May  2 11:17:10 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 02 May 2008 17:17:10 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <481AE605.50102@cheimes.de>
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
	<481AE605.50102@cheimes.de>
Message-ID: <481B3076.1020903@shopzeus.com>


> You can replace the try/finally code with a "with resource:
> do_something()" block if the object supporst the context manager protocol.
>   
I'm using 2.4 so...
> If you want to run some code during the shutdown phase of the Python
> process you can register a callback function in the "atexit" module.
>   
I also wanted to tell this to the OP but he was asking about signals. 
AFAIK atexit is only called on SIGTERM, not on others.
> Do NOT mix threads and signals. It's usually a very bad idea and may
> lead to surprising side effects. Signals are only handled by the main
> thread.
>   
Well, I have to, because:

#1. I have a server that uses threads. Using fork() instead of threading 
would be a nightmare in my case.
#2. It must support signals, just because some users tend to use things 
like "killall python" and try/finally is not useful in those cases. I 
cannot do anything to prevent the users killing the server. They will 
just do it...

I know that signals are handled in the main thread only. This is why I'm 
using a threading.Event() object to allow all threads shut down 
cooperatively: sigterm will set the event, and then all threads 
(including the main thread) will exit gracefully (within a given 
timeout). Do you know a better solution?

Thanks,

   Laszlo



From deets at nospam.web.de  Fri May  2 09:52:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 15:52:47 +0200
Subject: is +=1 thread safe
In-Reply-To: <Xns9A9255EE37A96duncanbooth@127.0.0.1>
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
	<Xns9A9255EE37A96duncanbooth@127.0.0.1>
Message-ID: <680kliF2q3c3lU1@mid.uni-berlin.de>

Duncan Booth schrieb:
> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> 
>> On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:
>>
>>> Of course it's not thread safe.   For the same reason and more basic, 
>>> even the expression i++ is not thread safe in C++.
>>>
>>> Any such calculation, on modern processors, requires three operations: 
>>>   retrieve value of i into a register,
>>>   increment the register
>>>   write the value into i.
>> There are no modern processors with an opcode for incrementing a memory
>> location!?  At least my C64 can do that.  ;-)
>>
> The operation i++ in C/C++ implies two things: it increments the memory 
> location and returns the new result. That means there are at least two ways 
> to generate code for this:
> 
>    increment memory
>    load new value
> 
> or
> 
>    load value
>    incremenent
>    store
> 
> Neither of these is going to be thread-safe (even on a C64) unless you 
> protect the operations somehow. The latter is probably preferred as it only 
> implies two operations to memory whereas the former implies three.

This is not entirely right. increment is usually atomic (at least for 
single-core processors), so you don't suffer from a load/store being 
interrupted.

Of course it can happen that the previous or later loading of the value 
for computational purposes is interrupted by another thread. But you 
have the guarantee that all incs (and decs) are counted, in contrast to 
what the OP observed with python.

Diez


From deets at nospam.web.de  Wed May 28 17:19:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:19:15 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
Message-ID: <6a60ioF360u5uU1@mid.uni-berlin.de>

> Kind of like how this year's program won't work on next year's
> Python?

For somebody who has admitted to have only very rudimentary knowledge of 
python that's a pretty bold statement, don't you think?

>  Except Flaming Thunder is faster. ;)


Faster in execution speed for a very limited domain of problems - maybe.

But unless it grows support for structured data types, arrays and maybe 
even an object system - it's nothing but a toy language.

Diez


From arnodel at googlemail.com  Sat May  3 02:36:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 07:36:13 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de> <m21w4kbm4l.fsf@googlemail.com>
	<682e9cF2qodffU1@mid.uni-berlin.de>
Message-ID: <m2lk2r6giq.fsf@googlemail.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Fri, 02 May 2008 19:23:54 +0100, Arnaud Delobelle wrote:
>
>> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
>> 
>>>
>>> There are no modern processors with an opcode for incrementing a memory
>>> location!?  At least my C64 can do that.  ;-)
>> 
>> Indeed!  I remember a simple use was to make the border change colour
>> very fast, a v. cool effect when you're 12!
>>  
>>         CLV
>> LOOP:   INC $D020
>>         BVC LOOP
>> 
>> (from memory, untested!)
>
> That works but I think
>
> LOOP:	INC $D020
> 	JMP LOOP
>
> is a bit more straight forward.  Shorter in opcodes, equal in bytes, the
> loop is as fast but you save the two cycles of the CLV.  :-)

Ah you're right!  I thought I remembered that Bxx instructions took 2
cycles whereas a JMP takes 3.  I've checked it on the wonderful wide
web and Bxx takes 2 cycles if the branch fails, but 3 cycles if the
branch succeeds :) (or even 5 if it branches to a new page).

To bring this back on topic, I would qualify my code snippet as more
"Pythonesque" than yours ;)

-- 
Arnaud


From deets at nospam.web.de  Wed May 14 09:43:21 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 15:43:21 +0200
Subject: Python and Flaming Thunder
References: <mailman.1117.1210772083.12834.python-list@python.org>
Message-ID: <6908kuF2ud4e1U1@mid.uni-berlin.de>

>>> That's also a myth.  For example, if C is easy to maintain, why is
>>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
>>> the world?  There should be lots of single-asset 8-by-8 shotgun cross
>>> compilers written in C, if C is easier to maintain.
>>Not only is it the world's only "single-asset 8-by-8 shotgun cross
>>compiler," but according to google, it's also the world's only "shotgun
>>cross compiler" period.  But I guess if you make up your own terminology
>>you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
>>single-asset 8x8 shotgun cross compiler, and what makes that of any
>>value to me?
> 
> The web page explains.  It's a compiler that runs on 8 platforms and can
> generate executables for any of them on any of them.  It's not _totally_
> clear about what "single-asset" means, but it gives the impression (and
> the term somewhat suggests) that this means there's a single executable
> that does all of this (compare to gcc's design, where support for cross
> compiling to another arch is provided by a separate executable).

Which isn't too hard if all you have are simple datatypes as a handfull
numerical types + strings. 

Besides, from what I see, the supported platforms all are x86, 32bit &
64bit. And I bet GCC works pretty unmodified amongst these as well - only
binary formats differ. But let Flaming Thunder grow a library system with
dynamic loading, and I wonder how well his crosscompiler works..



Diez


From bblais at bryant.edu  Thu May  8 08:09:40 2008
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 8 May 2008 08:09:40 -0400
Subject: framework build question for mac
Message-ID: <4349B4C2-75A3-48B3-A9B1-CE5047B98BEC@bryant.edu>

Hello,

I just had to install an older version of python for a particular  
app.  Afterward, I had some necessary clean-up so that my normal work  
python would work, but I noticed something odd about the  
installation.  Python is installed on the Mac in the directory

/Library/Frameworks/Python.framework/Versions

where there is (now) a 2.5 and a 2.4 directory, and a link called  
Current which points to the 2.5 directory.  So far, so good.  Now,  
the python binary (as well as idle, and some other python related  
binaries) are in /usr/local/bin and are links:

python@ -> ../../../Library/Frameworks/Python.framework/Versions/2.5/ 
bin/python
pydoc@ -> ../../../Library/Frameworks/Python.framework/Versions/2.5/ 
bin/pydoc
python2.4@ -> ../../../Library/Frameworks/Python.framework/Versions/ 
2.4/bin/python2.4
etc...

Now, what I find odd is that the generic binaries (python, pydoc,  
etc...) as opposed to the version-specific binaries (python2.4,  
python2.5, etc...) do not point to the Current link in the /Library/ 
Frameworks/Python.framework/Versions/ directory, but instead point to  
the last python installed.  As a result, in addition to re-pointing  
the Current link, I also had to manually re-point python, pydoc,  
idle, etc... in /usr/local/bin

Is there a reason for this, or is it just a small oversight on the  
install script?


			thanks,

				Brian Blais


-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais



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From tjreedy at udel.edu  Mon May 19 09:36:46 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 09:36:46 -0400
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <g0rvpc$57c$1@ger.gmane.org>


<ivarnelispam at gmail.com> wrote in message 
news:960da03c-1edf-4fa4-b434-6656e8a8884f at e39g2000hsf.googlegroups.com...
| Hello all,
|
| I'm starting work on what is going to become a fairly substantial
| Python project, and I'm trying to find the best way to organize
| everything. The project will consist of:
|
| - A few applications
| - Several small scripts and utilities
| - Unit tests and small interactive test programs
| - A number of custom libraries and modules that may be shared and
| referenced among all of the above
|
| I have the following general structure in mind:
|
| myproject/
|  app1/
|    main.py

If you put myproject in Pythonxy/Lib/site-packages, there is no need to 
fiddle with PYTHONPATH or sys.path.  In 3.0a5 I tried a relative import and 
got a message that relative imports only work within packages, not modules. 
I presume that means package.__init__.py.  Maybe I just miswrote the 
import, but I decided to stick with what dependably works whether from 
within or without the package
from package.subpackage import module  #or
from package.subpackage.module import object.

I agree with the comment about removing the 'shared' package layer.
Two packages deep is enough typing unless the deeper hierarchy is needed 
(like possibly the 'tests' subsubpackages, if they make running the tests 
easier).

tjr





From mensanator at aol.com  Sat May 10 23:24:32 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 20:24:32 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com>

On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
> ? ? if i%3 == 0 and i%5 != 0:
> ? ? ? ? print "Fizz"
> ? ? elif i%5 == 0 and i%3 != 0:
> ? ? ? ? print "Buzz"
> ? ? elif i%5 == 0 and i%3 == 0:
> ? ? ? ? print "FizzBuzz"
> ? ? else:
> ? ? ? ? print i
>
> is there a better way than my solution? is mine ok?

Define better.

>>> f = ['','','Fizz']*100
>>> b = ['','','','','Buzz']*100
>>> for i in xrange(1,100):
	fb = f[i-1]+b[i-1]
	if fb=='':
		print i
	else:
		print fb


From arnodel at googlemail.com  Sun May 11 15:49:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 20:49:53 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <m21w484o4e.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

>> ...and the exact error message was?
>> 
>> Here is a tip: if you want people to help you, then you have to help
>> them to help you.  Personally, I wouldn't respond to anymore of your
>> questions because you seem incapable of posting the information that was
>> requested.
>
> So far, the people who have answered this post have gone on the 
> assumption that I'm stupid.  I'm not.  I took perfectly working code, 
> cut it from one class, and put it in another.  It stopped working in the 
> second class.  I've spent days on this and trust me, given what I've 
> experienced of the Python community so far, if I didn't have to ask, I 
> wouldn't.

I have in no way assumed that you are stupid.  I have tried to help
you formulate your problem better so that people on the list can help
you.  I believe I have done so respectfully, with the aim of
introducing you to the modus operandi of this group.

> (I really must say that so far the help I am getting in the Python 
> community is a big let down.  Whether it's on IRC or here, everyone has 
> an arrogance that I don't find anywhere else in the open source 
> community, and it seriously makes me question the choice of language that 
> I've made.)

Don't judge too quickly.  I think this newsgroup is on the whole
extremely helpful.  I have learnt a lot from it.  But you have to get
used to its ways, and until you are familiar with them, approach it
with humility.

> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

This is different from the error message that you posted in your
original message.

Anyway, what is useful to us is a full traceback, no just an error
message.

-- 
Arnaud


From sunny0815 at gmxpro.de  Wed May 28 13:09:01 2008
From: sunny0815 at gmxpro.de (Matthias Sommer)
Date: Wed, 28 May 2008 19:09:01 +0200
Subject: Problem using Idle under Linux - mouse not working well
Message-ID: <6a5hteF36fnfeU1@mid.individual.net>

I have a strange problem using the python-Idle: I'm used to be able to 
position the cursor by clicking on the desired position. When I run Idle 
under Mandriva (or under Arch Linux as well) this does not work.

Running under windows it works, running under Xandros linux on my eee pc 
  it works too, so it's not linux specific.

I already asked on the (german) python ng. There have been reports that 
it works too on Suse and Ubuntu. But as of yet no hint where to look to 
make it working under Arch oder Mandriva.

Strange enough, i can position the Cursor by Ctrl-clicking.

I tried with a tiny Tk program with a single text field - there the 
positioning does work too.

So it seems to be a bug in the distro(s) and regarding only Idle not 
Tkinter in total. Where could I look?

Thanks in advance

Matthias


From __peter__ at web.de  Fri May 23 04:07:08 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:07:08 +0200
Subject: error using all()/numpy [TypeError: cannot perform reduce with
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <g15tva$t0f$03$1@news.t-online.com>

Marc Oldenhof wrote:

> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
> 
> [start Python]
> 
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>> a=['1','2','3']
>>>> all(a)
> True
>>>> from numpy import *
>>>> all(a)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
>     return _wrapit(a, 'all', axis, out)
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
>     result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
> 
> [end of example]
> 
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
> 
> Is there another way around this error?

That's not an error; star-import is a rebinding operation, just like
assignments and the def statement. 

>>> from numpy import *
>>> del all, sum, any
>>> all("123")
True

Peter


From gagsl-py2 at yahoo.com.ar  Sun May 25 01:08:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 02:08:35 -0300
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
Message-ID: <op.ubo1wlhix6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 00:30:10 -0300, <notnorwegian at yahoo.se> escribi?:

> when running a very computationalheavy program in the shell it
> sometimes freezes but the commandprompt runs it without problems and
> muh faster, why?

My Palantir isn't working very well lately, so it's hard to tell what's wrong if you don't show us the code...

> also, the command prompt starts at C:\Users\user>
>
> i want to start at C:\python25\progs
>
> how do i change that?

I don't see how is this related to Python, but anyway: right-click on the icon/shortcut you use to open it, select Properties, and change its "Start in" directory.

-- 
Gabriel Genellina



From george.sakkis at gmail.com  Fri May  2 15:57:44 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 12:57:44 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
Message-ID: <cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com>

On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
> On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > Shawn Milochik wrote:
> > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > can this be done in Gmail?
>
> > Set up a filter that looks for some phrase in the mail headers that
> > identifies messages originating from google groups.  Gmail's filters are
> > fairly flexible.  I'd probably just have it look for certain words.
> > Look at an e-mail's source (raw view) and particularly check in the
> > headers for things to filter by.
>
> Why don't you just block all messages from Gmail?

Look up the term "false positive" before you make such brilliant
suggestions in the future.

Posting-from-google-groups-ly yrs,

George




From deets at nospam.web.de  Thu May 15 06:37:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 15 May 2008 12:37:04 +0200
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <692i3kF2vrfbfU1@mid.uni-berlin.de>

Gabriel wrote:

> Hi all
> 
> Just wondering if someone could clarify this behaviour for me, please?
> 
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
> 
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
> 
> 
> I got this example from page 38 of Beginning Python.

The "problem" is that all the lists inside the outer list are the same
list - you can check that with 

id(tasks[0]) == id(tasks[1])

So instead of creating a list of list by the *-operator that only multiplies
the references (which is fine immutable objects like strings or numbers),
you need to explicitly create new lists, e.g. with a list-comprehension:

tasks = [[] for _ in xrange(6)]

Try this and everything will work as expected.

Diez


From castironpi at gmail.com  Sat May 17 04:52:53 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 01:52:53 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<PWmXj.46797$3v1.36691@bignews3.bellsouth.net>
Message-ID: <72d09350-ba1b-4af4-8fc5-190b6888bbb6@y21g2000hsf.googlegroups.com>

On May 16, 4:23?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> globalrev wrote:
> > pickle.dumps(mg)
> > pickle.load(mg)
>
> > 'dict' object has no attribute 'readline'
> > dumps load(well i dont know but i get no complaint but running load
> > generates that error)
>
> The 'loads' and 'dumps' methods use strings:
>
> ?>>> import pickle
> ?>>> d = {"this": 42, "that": 101, "other": 17}
> ?>>> s = pickle.dumps(d)
> ?>>> s
> "(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
> ?>>> pickle.loads(s)
> {'this': 42, 'other': 17, 'that': 101}
>
> If you want to store to / restore from file, use 'dump' and 'load':
>
> # write to file 'out'...
> ?>>> f = open("out")
> ?>>> f = open("out", "wb")
> ?>>> pickle.dump(d, f)
> ?>>> f.close()
>
> # restore it later
> ?>>> g = open("out", "rb")
> ?>>> e = pickle.load(g)
> ?>>> g.close()
> ?>>> e
> {'this': 42, 'other': 17, 'that': 101}
>
> Also seehttp://docs.python.org/lib/pickle-example.html.
>
> Hope this helps!
>
> --Hans

I want to compare that cleanliness with other languages to compare
formats.

Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
pickle.load( 'out', 'rb' )?


From gagsl-py2 at yahoo.com.ar  Mon May  5 02:36:38 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 03:36:38 -0300
Subject: Script using generators produces different results when invoked
	as a CGI
References: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>
Message-ID: <op.uan4ncx9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:31:45 -0300, Barclay, Ken <Ken.Barclay at schwab.com> escribi?:

> I attended David Beazley's awe-inspiring tutorial on the use of
> generators in systems programming:
>http://www.dabeaz.com/generators/
> <BLOCKED::http://www.dabeaz.com/generators/>
>I used his approach to write a web tool that can display search results
> from different log files. But the resulting script produced fewer
> results when invoked as CGI than it did when run from the command line,
> and I can't figure out why.

> Problem: For small sets of files this works great. But when I had 19Meg
> worth of log files in a test directory, the script would return the
> correct number of matching lines (288) only when it was invoked directly
> from the command line. When invoked from a CGI script, it returns 220
> lines instead (written to the "tempfile", below.) I don't know where
> that limit is coming from. If more logs are added to the test directory,
> the result is always the same 220 lines.
>I'm using Python 2.5.1 on Red Hat Linux 3.2.3-47. Below is the whole
> script I was testing with. It's using hard-coded values in place of ones
> I'll be getting from an HTML form (generated with HTMLgen) presented to
> the user.
>There are no exceptions or errors of any kind. Any pointers on what
> might be happening here would be welcome!

No entry in the error log, on the web server? (Apache?)
Perhaps you're hitting some internal limit of the cgi process, either memory or cpu time per request or temp file size...
Are you sure the script runs to completion? Output a message at the end, to be sure.

-- 
Gabriel Genellina



From bruno.desthuilliers at gmail.com  Fri May 23 16:30:14 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 13:30:14 -0700 (PDT)
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <05a04c1f-a02a-45dc-863a-755aca53375a@c65g2000hsa.googlegroups.com>

On 23 mai, 21:40, "Joel Koltner" <zapwireDASHgro... at yahoo.com> wrote:
> How do I get Python to correctly re-load this function definition?
>
> In test.py:
>
> def testFunc():
>     print 'My testFunc!'
>
> I execute...
>
> >>> from test import testFunc
> >>> testFunc()
>
> My testFunc!
>
> Fine... now I change test.py to:
>
> def testFunc():
>     print 'Modified testFunc!'
>
> ...and I'd like to reload testFunc.  How do I do so?  'from test import
> testFunc' keeps the old definition around, and 'reload test' of course doesn't
> work becayse I didn't use 'import test' in the first place.

Import the module and use the fully qualied name. Or use Emacs with
python-mode.


From deets at nospam.web.de  Wed May 28 06:53:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 12:53:00 +0200
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
Message-ID: <6a4rtbF35ut5sU1@mid.uni-berlin.de>

Ankit wrote:

> Hi everyone,i wanted to build a flash decoder using python can
> somebody tell me which library to use and what steps should i follow
> to make a flash(video) decoder?By a decoder i mean that i need to
> display all the pixel values of each frame.Waiting for your replies.

Check out libffmpeg. It should be accessible using python by various means,
including gstreamer or ctypes.

This is however a rather advanced topic.

Diez


From jr9445 at ATT.COM  Fri May 23 13:26:31 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Fri, 23 May 2008 12:26:31 -0500
Subject: webspider, regexp not working, why?
In-Reply-To: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
References: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B490905649D@brexc51p>



> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of
> notnorwegian at yahoo.se
> Sent: Friday, May 23, 2008 12:43 PM
> To: python-list at python.org
> Subject: webspider, regexp not working, why?
> 
> url = re.compile(r"^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]
> 
> search and match yields the same results.
> 
> but when you put something like href= in front of it it doesnt work.


a)  '^' matches at the beginning of a line.  So if 'href=' is at the
beginning of the line...

b)  Regexes are hard enough to read as is.  (http|ftp|https) is more
readable than ((ht|f)tp(s?).

c)  If you're going to parse html/xml then bite the bullet and learn one
of the libraries specifically designed to parse html/xml.  Many other
regex gurus have learned this lesson.  Myself included.  =)



*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA621




From cjw at ncf.ca  Tue May 20 20:52:59 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Tue, 20 May 2008 20:52:59 -0400
Subject: Misuse of list comprehensions?
In-Reply-To: <48337015.80202@ncf.ca>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<48337015.80202@ncf.ca>
Message-ID: <g0vrpl$7fg$1@theodyn.ncf.ca>

Colin J. Williams wrote:
> John Salerno wrote:
>> I posted this code last night in response to another thread, and after 
>> I posted it I got to wondering if I had misused the list 
>> comprehension. Here's the two examples:
>>
>> Example 1:
>> --------------------
>> def compress(s):
>>     new = []
>>
>>     for c in s:
>>         if c not in new:
>>             new.append(c)
>>     return ''.join(new)
>> ----------------------
>>
>> Example 2:
>> ------------------------
>> def compress(s):
>>     new = []
>>     [new.append(c) for c in s if c not in new]
>>     return ''.join(new)
>> --------------------------
>>
>> In example 1, the intention to make an in-place change is explicit, 
>> and it's being used as everyone expects it to be used. In example 2, 
>> however, I began to think this might be an abuse of list 
>> comprehensions, because I'm not assigning the result to anything (nor 
>> am I even using the result in any way).
>>
>> What does everyone think about this? Should list comprehensions be 
>> used this way, or should they only be used to actually create a new 
>> list that will then be assigned to a variable/returned/etc.?
>>
> 
> Alternative ways of of looking at the problem are:
> 
> # compress.py
> import sets
> 
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> 
> def compress1(s):
>   new= []
>   d= dict(zip(s, len(s)*[[]]))
>   return d.keys()
> 
> def compress2(st):
>   s= sets.Set(st)
>   return s
> 
> if __name__ == "__main__":
>   s= 'In example 1, the intention to make an in-place change is 
> explicit, and it is'
>   print (compress(s))
>   print (compress1(s))
>   print (compress2(s))
> 
> Results:
> 
> In exampl1,thiok-cgsd
> ['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 'k', '-', 'm', 'l', 'o', 'n', 
> '1', 'p', 's', 't', 'x', ',', 'd']
> Set(['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 'k', '-', 'm', 'l', 'o', 
> 'n', '1', 'p', 's', 't', 'x', ',', 'd'])
> 
> Colin W.

I should have read all the responses 
before responding!

Paul McGuire had already suggested a set 
approach

Colin W.


From mnikhil at gmail.com  Wed May 14 11:07:00 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 20:37:00 +0530
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
	<mailman.1094.1210727711.12834.python-list@python.org>
Message-ID: <g0ev6o$utb$1@registered.motzarella.org>

Christian Heimes wrote:
> Ian Kelly schrieb:
>> The purpose of obj.__len__() is to implement len(obj), which simply
>> calls it.  So obj.__len__() may be faster, but only marginally.  The
>> reason to prefer len(obj) is that if you inadvertently pass an object
>> that does not implement __len__, you get the more appropriate
>> TypeError rather than an AttributeError.
> 
> len(obj) is faster than obj.__len__() for several types like str. In
> general len() is as least as fast __len__(). len() also does some extra
> sanity checks.
> 
> python2.5 -m timeit "'abc'.__len__()"
> 1000000 loops, best of 3: 0.453 usec per loop
> 
> python2.5 -m timeit "len('abc')"
> 1000000 loops, best of 3: 0.292 usec per loop
> 
> Common code paths are already highly optimized. Don't try to be clever
> unless you really understand what happens inside the interpreter. The
> __internal__ methods are called magic methods for a reason. ;)
> 
> Christian
> 
Thanks for the useful insight.
Then why to have __len__() internal method at all when the built-in 
len() is faster?
I heard, in Python3, this internal method is being pruned/renamed to 
something else? Can someone please shed light here?

Thanks. Nikhil


From gagsl-py2 at yahoo.com.ar  Mon May 19 05:56:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 06:56:20 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
Message-ID: <op.ubea76fsx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch <deets at nospam.web.de> escribi?:
> Agustin Villena schrieb:

>> is there anyway to show the class of a method in an exception's
>> traceback?
>>
>> I want to improve the line
>> File "G:\dev\exceptions\sample.py", line 3, in foo
>>
>> to
>> File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>
>> Is this improvement feasible
>
> It should be. You can get a dictionary of the locals of an exception
> stack frame, of which you could extract the self-parameter's class.

That by itself is not enough, the method could be inherited; one should walk the base classes in the MRO to find the right one. And deal with classmethods and staticmethods. And decorators that don't preserve meta information... Hmmm, I think it isn't so trivial as it seems.

-- 
Gabriel Genellina



From alan.wright at volubill.com  Mon May 19 15:25:57 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 20:25:57 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
Message-ID: <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>

Thanks for the feedback.

Using the socket in a list is great

However, as i imagined, I now get a limit of around 1500 conns before the 
system crashes out, also i have noticed, that the ports loop back to 1025 
when they hit 5000.

Any ideas on how to make the list/socket get to around 50K

TIA

Alan
<s0suk3 at gmail.com> wrote in message 
news:e8e610ae-dec8-4551-b769-28ce9254c2b1 at c58g2000hsc.googlegroups.com...
> On May 19, 10:25 am, "Alan Wright" <alan.wri... at volubill.com> wrote:
>> Hi Folks,
>> I am newbie to Python, but have successfully created a simple client and
>> server setup, I have one issue though.
>>
>> I am trying to test a box by sending many TCP conns (WHILE loop) but not
>> closing them with a FIN/RST. However, no matter what i do, i cannot get 
>> the
>> loop to stop sending FIN from the client.
>>
>> Any clues?
>>
>> Here is my current script
>>
>> #!/usr/bin/python
>>
>> import socket,sys
>> from numpy import *
>> num1=0
>>
>> while (num1<=10) :
>>
>>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>  s.settimeout(10.0)
>>  s.connect(("10.1.1.69", 50008)) # SMTP
>>  print s.recv(1024) + '\n',
>>  num1=num1+1
>>  #s.close()
>>
>> sys.exit(1)
>
> socket.socket instances do an implicit close() on the socket when the
> object is destructed (in this case, it's destructed when it is garbage-
> collected). What's happening is that on each iteration, the variable
> "s", which references the socket.socket instance, is assigned to a new
> socket.socket instance, therefore the instance of the previous
> iteration is no longer referenced by "s", and since it's no longer
> referenced by anything, the instance is garbage-collected,
> automatically imposing an implicit close() on that instance. A simple
> solution could be to create a list and append the socket.socket
> instance of each iteration to that list, that way the instances would
> remain referenced in the list and not be garbage-collected; though you
> might be able to find a more elegant solution.
>
> Sebastian 




From gandalf at shopzeus.com  Wed May 21 15:15:52 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 21:15:52 +0200
Subject: problem with import / namespace
In-Reply-To: <b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>	
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
Message-ID: <483474E8.8090708@shopzeus.com>

ohad frand wrote
> Hi
> Thanks for the answer.
> I probably didnt write the problem accurately but it is not as you 
> described.
> (i already read before the section that you pointed and it didnt help me)
> the problem is that i dont want to import a file from different 
> directory but only from the same directory.
> \\1\tmp2.py imports \\1\tmp1.py
> \\2\tmp2.py imports \\2\tmp2.py
> but when i execute the following script in the interpreter i get that 
> the second tmp2.py file imports not the file from the same directory 
> but the file that was already imported by the first executed tmp2.py file.
I think that using absolute names DOES solve the problem.

import two.tmp2  # This will import tmp2.py in "two" folder for sure!

> >>> execfile("tmp2.py") <- here the executaion is OK
> >>> os.chdir("c:\\2")
> >>> execfile("tmp2.py") <- here the execution is not ok because 
> tmp2.py file imports the tmp1.py file from c:\\1 which is not OK
Hmm looks like your tmp2.py file is not a module but a whole program. No 
wonder I could not understand you - I thought that "tmp2.py" is a 
module, not a program.

The answer in this case: if tmp2.py is a program then you should either 
manipulate sys.path or chdir to the containing dir, as I told in my 
former post. ( os.split(os.abspath(__file...))) -> then chdir or 
sys.path.insert(0,mydir) )

> in between those two execfile commands i tried to do a lot of things 
> but every time python imported the incorrect file for the second 
> execution. (i am not building a package and those names are just 
> examples for the problem, i am not really using 1 and 2 names as dirs)
Why do you need execfile?

  Laszlo



From python-url at phaseit.net  Mon May  5 20:11:23 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Tue, 6 May 2008 00:11:23 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May  6)
Message-ID: <fvo7nb$5cq$1@lairds.us>

QOTW:  "[buildout] is not just some stupid thing." - Alan Runyan    
    http://wiki.python.org/moin/buildout has more background
    
    
    sum() doesn't use the best possible algorithm when dealing with floating
    point numbers:
        http://mail.python.org/pipermail/python-list/2008-May/489396.html
    
    Is count += 1 a thread-safe operation?
        http://mail.python.org/pipermail/python-list/2008-May/489103.html
    
    Python may read a file faster than C code (!):
        http://mail.python.org/pipermail/python-list/2008-April/488342.html
    
    When to use #!/usr/bin/python and other variants of the shebang line:
        http://mail.python.org/pipermail/python-list/2008-May/489190.html
    
    Find and execute a function given its name:
        http://mail.python.org/pipermail/python-list/2008-April/488648.html
        http://mail.python.org/pipermail/python-list/2008-April/485451.html
    
    How to store program configuration options in a human-readable format:
        http://mail.python.org/pipermail/python-list/2008-May/489094.html
    
    A simple question triggers a long thread: why ord/chr aren't methods
    of the str class? why str.join and not list.join?
        http://mail.python.org/pipermail/python-list/2008-April/488908.html
    
    How to "unread" a line when iterating over a file:
        http://mail.python.org/pipermail/python-list/2008-April/488661.html
    
    Problems with unicode objects in exception messages:
        http://mail.python.org/pipermail/python-list/2008-April/488672.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From gherron at islandtraining.com  Sun May  4 12:03:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 09:03:32 -0700
Subject: is +=1 thread safe
In-Reply-To: <yfsod7mfcl0.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
Message-ID: <481DDE54.102@islandtraining.com>

Alexander Schmolck wrote:
> Gary Herron <gherron at islandtraining.com> writes:
>
>   
>> But... It's not!  
>>
>> A simple test shows that.   I've attached a tiny test program that shows this
>> extremely clearly.  Please run it and watch it fail.
>>     
>
> In [7]: run ~/tmp/t.py
> final count: 2000000
>   should be: 2000000
>
> (I took the liberty to correct your test to actually do what I said, namely
> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> numpy.array(0)``).
>   

The test was meant to simulate the OP's problem, but even with your 
suggestion of using numpy, it *still* fails!  Just start increasing the 
number of increments by a factor of 2, 4, 10 until it fails:

final count: 1999998
  should be: 2000000

final count: 5999997
  should be: 6000000

final count: 5995068
  should be: 6000000

(Surprisingly, using numpy makes this test *much* slower, meaning the 
increment executes many more instructions, which implies hitting a 
thread context switch at exactly the critical point is much less 
common.   But it can happen if you run the test long enough.)

I am running this on a Core2 Duo CPU, but the GIL should prevent that 
from affecting the result of the run.

I've reattached the file with the numpy change (and a larger loop 
counter) for others to try.

Gary Herron

>
> 'as
>
> p.s. please don't send me copies to on-list replies, at least not without
> explicitly mentioning the fact -- I've got better things to do then guessing
> whether something was meant to be off-list or not.
>   
My apologies.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

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From wizzardx at gmail.com  Mon May  5 13:47:19 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 19:47:19 +0200
Subject: unicode newbie - printing mixed languages to the terminal
In-Reply-To: <30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>
References: <mailman.558.1209935553.12834.python-list@python.org>
	<30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>
Message-ID: <18c1e6480805051047x5efec67dxedcc3930fc9b609c@mail.gmail.com>

>  I suggest you read http://www.amk.ca/python/howto/unicode to demystify what
> Unicode is and does, and how to use it in Python.

That document really helped.

This page helped me to setup the console:http://www.jw-stumpel.nl/stestu.html#T3

I ran:

dpkg-reconfigure locales # And enabled a en_ZA.utf8
update-locale LANG=en_ZA.utf8

(And then rebooted, but I don't know if that was necessary).

I can now print mixed language unicode to the console from Python.

Thanks for your help.

David.


From szhorvat at gmail.com  Mon May  5 04:26:11 2008
From: szhorvat at gmail.com (Szabolcs)
Date: Mon, 5 May 2008 01:26:11 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1> 
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
Message-ID: <2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>

On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> Gabriel Genellina wrote:
>
> > Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement.
>
> It does not _require_ this, but using an __add__ that is not commutative
> and associative, or has side effects, would qualify as a serious misuse,
> anyway.

Sorry, I meant associative only, not commutative.


From bignose+hates-spam at benfinney.id.au  Tue May  6 20:37:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 07 May 2008 10:37:23 +1000
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <87y76nc5ks.fsf@benfinney.id.au>

vivainio at gmail.com (Ville M. Vainio) writes:

> So I'm not opposed to GPL - just saying that it's not often the
> choice that will net you the most users.

Fortunately, that's not always the goal of a free software project.
When freedom of all users matters more than "popular at any cost", the
GPL is a better choice.

-- 
 \       "One of the most important things you learn from the internet |
  `\   is that there is no 'them' out there. It's just an awful lot of |
_o__)                                            'us'." ?Douglas Adams |
Ben Finney


From ivan.illarionov at gmail.com  Sat May 24 09:12:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 24 May 2008 13:12:10 +0000 (UTC)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <g1947a$v28$1@news.mtu.ru>

On Fri, 23 May 2008 22:56:57 -0700, cm_gui wrote:

> i am not comparing Python with C or C++ which are of course compiled
> languages.
> 
> if there is any consolation to Python lovers here, Python is still
> faster than Microsoft ASP/ASPX.
> 
> i'm not trying to 'troll' here.   it's not just me. many have complained
> that python is slow.   python websites are slow.
> 
> if python is such a good programming/scripting language, why can't they
> build a faster interpreter/compiler engine? and beat php and zend.
> to the python team, rebuild your interpreter!
> 
> 
> torontolife.com is slow.
> 
> okay, maybe Python is only slightly slower than PHP, but it APPEARS to
> be much slower.
> there is a distinct waiting time whenever you access a python web page
> before the page starts loading.  but once it loads, it is fast. php page
> starts loading immediately once you access it, but you can see the page
> slowly loading. because you see the page starts loading immediately, you
> feel it is fast.


It's only your feelings based on prejudice.

Please look at the real benchmarks:

http://www.alrond.com/en/2007/jan/25/performance-test-of-6-leading-
frameworks/

PHP is the slowest.
Python/Django is the fastest. 2x-35x times faster then PHP.

Give us the real benchmarks or stop trolling.

Ivan


From stephane.larouche at polymtl.ca  Fri May  9 20:55:47 2008
From: stephane.larouche at polymtl.ca (=?utf-8?b?U3TDqXBoYW5l?= Larouche)
Date: Sat, 10 May 2008 00:55:47 +0000 (UTC)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
Message-ID: <loom.20080510T004435-107@post.gmane.org>


> On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> > On behalf of the Python development team and the Python community, I
> > am happy to announce the third alpha release of Python 2.6, and the
> > fifth alpha release of Python 3.0.

After I installer Python 2.6a3, Matlab R2007a began having problems. When I
start Matlab, it shows a window indicating that it is installing Microsoft
Visual C++ 2005 Redistributable, which fails, and then Matlab closes. This
problem did not happen with Python 2.6a2 and removing Python 2.6a3 solves the
problem.

Is anybody else having the same problem? Do you know what causes it? Is there a
workaround?



From tjreedy at udel.edu  Tue May 20 13:57:57 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 13:57:57 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com><69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
Message-ID: <g0v3f3$ivq$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:027e4d96$0$25054$c3e8da3 at news.astraweb.com...
| "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
| news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
| > the above code is pretty much of a no-no because it has quadratic 
runtime
| > behavior.
|
|
| What's that mean, exactly? Are you referring to both examples, or just 
the
| second one?

Both.  Searching new takes longer each time.  More exactly, the number of 
comparisons should be about len(s)*len(new_final)/2, depending on how 
duplicates are distributed in s. 





From foul_ole_ron1 at yahoo.com  Fri May 23 03:20:50 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 00:20:50 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <04510c4f-aa15-4c5a-860c-eca762a99546@t54g2000hsg.googlegroups.com>

On 23 mei, 09:12, Marc Oldenhof <foul_ole_r... at yahoo.com> wrote:
> Hello all,
>
> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
>
> [start Python]
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> a=['1','2','3']
> >>> all(a)
> True
> >>> from numpy import *
> >>> all(a)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
> ? ? return _wrapit(a, 'all', axis, out)
> ? File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
> ? ? result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
>
> [end of example]
>
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
>
> Is there another way around this error?
>
> Marc

Never mind, I found a way. For reference:

>>> import __builtin__
>>> __builtin__.all(a)
True

Works!

Marc


From gagsl-py2 at yahoo.com.ar  Sun May 25 22:25:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 23:25:33 -0300
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
	<a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>
Message-ID: <op.ubqo0vo3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 22:42:06 -0300, <notnorwegian at yahoo.se> escribi?:

> def joinSets(set1, set2):
>     for i in set2:
>         set1.add(i)
>     return set1

Use the | operator, or |=

> Traceback (most recent call last):
>   File "C:/Python25/Progs/WebCrawler/spider2.py", line 47, in <module>
>     x = scrapeSites("http://www.yahoo.com")
>   File "C:/Python25/Progs/WebCrawler/spider2.py", line 31, in
> scrapeSites
>     site = iterator.next()
> RuntimeError: Set changed size during iteration

You will need two sets: the one you're iterating over, and another collecting new urls. Once you finish iterating the first, continue with the new ones; stop when it's empty.

> def scrapeSites(startAddress):
>     site = startAddress
>     sites = set()
>     iterator = iter(sites)
>     pos = 0
>     while pos < 10:#len(sites):
>         newsites = scrapeSite(site)
>         joinSets(sites, newsites)
>         pos += 1
>         site = iterator.next()
>     return sites

Try this (untested):

def scrapeSites(startAddress):
     allsites = set() # all links found so far
     pending = set([startAddress]) # pending sites to examine
     while pending:
       newsites = set() # new links
       for site in pending:
         newsites |= scrapeSite(site)
       pending = newsites - allsites
       allsites |= newsites
     return allsites

> wtf? im not multithreading or anything so how can the size change here?

You modified the set you were iterating over. Another example of the same problem:

d = {'a': 1, 'b': 2, 'c':3}
for key in d:
   d[key+key]=0

-- 
Gabriel Genellina



From antroy at gmail.com  Fri May 16 11:45:16 2008
From: antroy at gmail.com (Ant)
Date: Fri, 16 May 2008 16:45:16 +0100
Subject: Pyparsing Question
In-Reply-To: <ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>
Message-ID: <YOSdndykxtsMLbDVnZ2dnUVZ8s_inZ2d@posted.plusnet>

Hi Paul,

> LineStart *really* wants to be parsed at the beginning of a line.
> Your textline reads up to but not including the LineEnd.  Try making
> these changes.
> 
> 1. Change textline to:
> 
>      textline = pp.Combine(
>         pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
> \
>         pp.LineEnd().suppress()

Ah - so restOfLine excludes the actual line ending does it?

> 2. Change comb to:
> 
>     comb = head + parser

Yes - I'd got this originally. I added the garbage to try to fix the 
problem and forgot to take it back out! Thanks for the advice - it works 
  fine now, and will provide a base for extending the list format.

Thanks,

Ant...


From miller.paul.w at gmail.com  Mon May 26 15:28:22 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:28:22 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com> 
	<mailman.1623.1211828625.12834.python-list@python.org>
Message-ID: <fb0b96c6-eda1-4922-94f1-3303321501f9@c58g2000hsc.googlegroups.com>

On May 26, 3:03?pm, "Dan Upton" <up... at virginia.edu> wrote:

> Alternately, you can think of a pseudo-continuum from low level to
> high level, sort of as a function from language lines to assembly
> instructions... for instance, I seem to recall reading somewhere that
> made the example of BASIC being higher level than C because one
> statement in BASIC translated to, on average, 5 assembly instructions,
> whereas a C statement translated to, on average, 2.5 assembly
> instructions. ?Of course, maybe that's not the best metric ....

That might be a reasonable place to start.  But, remember the example
I gave for C/Python where

int max = len (seq);
for (int i=0; i < max; ++i) {
   somefunc ( seq[i] );
}

in C was more or less equivalent to

for item in seq:
    somefunc (item)

in Python?  Not only does the C code take up one more line, but it has
a lot of additional cruft with declaring variables, making sure the
iteration doesn't go out of bounds, and all that fiddly stuff you
don't have to worry about in Python.

Perhaps a better measure would be "how many language elements do I
need to express what I want to express."  In this case, I count around
10-11 in the C code, versus 5-6 in the Python code.  Thus, I'd say for
this particular case of iterating a sequence, Python is twice as
expressive as C.  (This is even giving C a little credit, because I
just assumed there was this function "len" that returned the size of
whatever sequence-thing.  In reality, you'd need to put more
boilerplate in to make something like that work.)


From lrahuel.notgood at voila.fr  Wed May 21 05:14:18 2008
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Wed, 21 May 2008 11:14:18 +0200
Subject: Python in non-standard location erring with "No module named
	_sha256"
References: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>
Message-ID: <4833e7eb$0$887$ba4acef3@news.orange.fr>

Maybe you run the configure, make, make install without addind devel
packages on your system. I mean:

openssl-devel
readline-devel
...

Regards,

emallove wrote:

> I'm running into the below "No modules named _sha256" issue, with a
> python installed in a non-standard location.
> 
> $ python
> Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
> [GCC 3.3.3 (SuSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import md5
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
>     from hashlib import md5
>   File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
> <module>
>     sha224 = __get_builtin_constructor('sha224')
>   File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
> __get_builtin_constructor
>     import _sha256
> ImportError: No module named _sha256
> 
> Googling around, this seems to be related to OpenSSL being in a non-
> standard location? I've edited the Setup file to set $(SSL) to the non-
> standard location. Now Python compiles fine, but I still get the above
> error.
> 
> Any help would be much appreciated.
> 
> Thanks,
> Ethan



From tjreedy at udel.edu  Sat May 10 14:43:39 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 14:43:39 -0400
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com><op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar><g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
Message-ID: <g04qcq$gd8$1@ger.gmane.org>


"Banibrata Dutta" <banibrata.dutta at gmail.com> wrote in message 
news:3de8e1f70805092138y4ca414ck2be6b5246afa664b at mail.gmail.com...
| given that I already have Python2.5 installed & will install Python2.4, 
will
| copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
| i think the answer is "no", but still asking. is it package specific ?

If a particular distribution consists of only Python code (no C dll's) and 
that code uses no 2.5 features and does not depend on any other 2.5 
changes, then it should work with 2.4.  Otherwise.... 





From nagle at animats.com  Fri May  9 03:12:09 2008
From: nagle at animats.com (John Nagle)
Date: Fri, 09 May 2008 00:12:09 -0700
Subject: threading - race condition?
In-Reply-To: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
Message-ID: <4823f61e$0$34533$742ec2ed@news.sonic.net>

skunkwerk wrote:
> i'm getting the wrong output for the 'title' attributes for this
> data.  the queue holds a data structure (item name, position, and list
> to store results in).  each thread takes in an item name and queries a
> database for various attributes.  from the debug statements the item
> names are being retrieved correctly, but the attributes returned are
> those of other items in the queue - not its own item.  however, the
> model variable is not a global variable... so i'm not sure what's
> wrong.
> 
> i've declared a bunch of worker threads (100) and a queue into which
> new requests are inserted, like so:
> 
> queue = Queue.Queue(0)
>  WORKERS=100
> for i in range(WORKERS):
> 	thread = SDBThread(queue)
> 	thread.setDaemon(True)
> 	thread.start()
> 
> the thread:
> 
> class SimpleDBThread ( threading.Thread ):
>    def __init__ ( self, queue ):
> 		self.__queue = queue
> 		threading.Thread.__init__ ( self )
>    def run ( self ):
> 		while 1:
> 			item = self.__queue.get()
> 			if item!=None:
> 				model = domain.get_item(item[0])
> 				logger.debug('sdbthread item:'+item[0])
> 				title = model['title']
> 				scraped = model['scraped']
> 				logger.debug("sdbthread title:"+title)
> 
> any suggestions?
> thanks

   Hm.  We don't have enough code here to see what's wrong.
For one thing, we're not seeing how items get put on the queue.  The
trouble might be at the "put" end.

   Make sure that "model", "item", "title", and "scraped" are not globals.
Remember, any assignment to them in a global context makes them a global.

   You should never get "None" from the queue unless you put a "None"
on the queue.  "get()" blocks until there's work to do.

					John Nagle


From anand.prabhakar.patil at gmail.com  Thu May 29 04:46:59 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 09:46:59 +0100
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <2bc7a5a50805290146v17ab6e8x3ac0aeae796542fb@mail.gmail.com>

On Thu, May 29, 2008 at 9:10 AM, Dark Wind <darkwind.87 at gmail.com> wrote:

> Hi,
>
> Is there any command in Python which gives the code for a function like
> just typing the name of a function (say svd) in R returns its code.
>
> Thank you
>

If you're using IPython, you can type svd?? .
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From straton at lampsacos.demon.co.uk  Mon May 19 13:00:43 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Mon, 19 May 2008 18:00:43 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0s26t$s2c$1@aioe.org>
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org>
Message-ID: <g0sbns$a5i$1$8300dec7@news.demon.co.uk>

I would still be concerned that you are checking against the percentage
of the 768 bins returned by the histogram method. Two pixels of
widely different colour end up in the same bin, so long as just ONE
of the Red, Green, or Blue components is equal.

So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
the bin for G=27. But they are very different colours.

There are actualy 256 * 256 * 256 colours, but I don't suppose
you want that many bins!

What you want is a much smaller number of bins, with pixels
of 'close' colours (whatever that means) put into the same bin.

What 'close' means for colours, is quite a difficult thing, and
the consensus is that using the three RGB coordinates is not
as good as certain other colour spaces.

You could use the ImageOps.posterize method to reduce the number of 
colours in the image, but whether 'close' colours end up together,
I don't know.

You might try the PIL special interest group (SIG) 'image-sig'

http://mail.python.org/mailman/listinfo/image-sig

(If you want to know exactly how many unique colours an image actually
has, load the image into the 'GIMP' assuming you have it,
and go to :

Menubar --> Filters --> Colours --> Colourcube analysis...

)










Poppy wrote:
> Thanks, since posting I  figured out how to interpret the histogram results, 
> which seems to be the consensus in responses. I wrote a check image program 
> and have been periodically calling it against a folder where I make a copy 
> of our images used for production. My method right now is to check what we 
> send for errors, but is not preventive.
> 
> Also I determined whitespace is not the only issue, any color that 
> dominates. I'm considering rewriting this code below to setup bins, so if 
> combined neighboring colors exceeds the threshold then reject the image. I 
> have examples where half the image appears black, but actually varies 
> throughout.
> 
> Since my image is RGB I'm looping through a 768 element list.
> 
> Zach-
> 
> import Image, os
> 
> 
> def check_image(file):
> 
>     try:
>         im = Image.open(file)
>     except:
>         return "Can't open file %s " % file
> 
>     imData = im.histogram()
>     i = 0
>     for ea in imData:
>         if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
>             return "bad image %s - %s element num is %s " % (file, ea, 
> str(i))
>         i = i + 1
> 
>     return "good image %s, image size is %s" % (file, im.size)
> 
> 
> def main(dir):
>     data = ""
>     try:
>         files = os.listdir(dir)
>         for ea in files:
>             data = data + str(check_image(os.path.join(dir,ea))) + "\n"
>     except:
>         return "Can't get files in %s" % dir
>     return data
> 
> print main("\\\\host\\path\\to\\image_folder\\")
> 
> 


From deets at nospam.web.de  Fri May 30 07:09:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 13:09:30 +0200
Subject: Saving tif file from tricky webserver
In-Reply-To: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>
References: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>
Message-ID: <6aa5jhF35304eU1@mid.uni-berlin.de>

schweet1 schrieb:
> Greetings,
> 
> I am attempting to automate accessing and saving a file (a TIF) from
> the following URL:
> 
> http://patimg1.uspto.gov/.DImg?Docid=US007376435&PageNum=1&IDKey=E21184B8FAD5
> 
> I have tried some methods using urllib, httplib, and
> web32com.client(InternetExplorer), but haven't been successful.
> Currently I am using (in Python 2.5)
> 
> import webbrowser
> 
> url = [see above]
> 
> webbrowser.open(url, new=0, autoraise=0)
> 
> When this is run a windows popup dialog opens asking me to Open, Save,
> or Cancel.  However, if I query multiple such URLs, I do not want to
> have to respond manually.  Is there a way I can use Python to save the
> TIF?

You need to figure out what really becomes the download url, and use 
that. Use e.g. http live headers for firefox to get that information.

If the server needs the form-submitting stuff to actually grant access 
to the TIFF, you might need to use mechanize to talk to the site as if 
you were a browser.

Diez


From sturlamolden at yahoo.no  Tue May 20 13:01:53 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 10:01:53 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>
Message-ID: <ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>

On May 19, 10:42 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:

> Well... They do - they are called 'C compilers' !-) As Roel Schroven
> mentioned - and he is at least partially right on this point - C has
> been designed to make optimizing C compiler not to hairy to write.

C has proven very difficult to optimize, particularly because pointer
aliasing prevents efficient register allocation.

Fortran was designed with ease of optimization in mind. Not many years
ago, it was not uncommon for Fortran code to run twice as fast as
equivalent C. C compilers have recently closed on on the gap by
becoming extremely good at what they do. But that is not because C is
easy to optimize. On the contrary.

For serious number crunshing, there is nothing that compares to
Fortran, even today. f2py makes it easy to call Fortran subroutines
from Python.







From ivan.illarionov at gmail.com  Sat May  3 19:52:58 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 23:52:58 +0000 (UTC)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
Message-ID: <fvitsq$15ti$3@news.mtu.ru>

On Sat, 03 May 2008 15:25:35 -0700, darkblueB wrote:

> I got the Python Imaging Library from source, built and installed, on
> Ubuntu 7.10, not realizing I could run a self-test first. libjpeg is on
> the machine, but was not detected.. so no JPG encoder. I got the
> dev-libjpg and rebuilt PIL. The self-test now shows JPG support.
> 
> but running setup.py install again seems to succeed, but still no JPG
> :-(
> 
> fix ideas appreciated

Make sure that libjpeg62-dev is installed
'sudo apt-get install libjpeg62-dev'

Try run 'python setup.py build_ext -f' to force setup.py to rebuild 
everything with JPEG. And 'sudo python setup.py install' should install 
PIL with JPEG support.

It should work on Ununtu 7.10 (works for me at least).

However, if you want Tkinter support, you should edit setup.py and change 
TCL_ROOT variable:
TCL_ROOT = '/usr/lib/tcl8.4', '/usr/include/tcl8.4'

And make sure that you have tcl/tk libraries/headers:
sudo apt-get install tcl8.4-dev tk8.4-dev


-- 
Ivan


From sjmachin at lexicon.net  Mon May 19 09:21:06 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 19 May 2008 13:21:06 GMT
Subject: Reading Java byte[] data stream over standard input
In-Reply-To: <02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>
Message-ID: <48317ec0$1@news.mel.dft.com.au>

sapsi wrote:
> I should also mention that for some reason there are several binay
> values popping in between for some reason. This behavior (for the
> inputr stream) is not expected
> 
> 
>> Now, the incoming data is binary(though mine is actually merely ascii
>> text) but the output is not what is expected. I expect for e.g
>>
>> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
>> 118.010.241.12 60370 128.210.5.176
>>
>> However i get a 1 before all and a 4 just after \n and before the 6.
>>
>> My question is : how do i read binary data(Java's byte stream) from
>> stdin?
>> Or is this actually what i'm getting?
>>

Consider changing "print x" to "print repr(x)" ... this would mean that 
you have a better chance of understanding what the extra or unexpected 
popping-in bytes are.


From mattheww at chiark.greenend.org.uk  Tue May 13 15:11:38 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 13 May 2008 20:11:38 +0100 (BST)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
Message-ID: <Apb*6NNcs@news.chiark.greenend.org.uk>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> I would like to write a similar problem without this non-programming  
> distracting issues (that is, a problem simple enough to be answered in a  
> few minutes, that requires only programming skills to be solved, and  
> leaving out any domain-specific knowledge).

Another reason not to like the FizzBuzz example is that it's quite
closely balanced between two reasonable approaches (whether to just
special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
add the Fizz and the Buzz together in that case). The interviewee might
reasonably guess that this distinction is what's being tested, and get
unnecessarily stressed about it.

-M-



From jstucklex at attglobal.net  Sun May 25 20:53:28 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:53:28 -0400
Subject: php vs python
In-Reply-To: <g1d1a4$1rpd$2@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
Message-ID: <9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>

Ivan Illarionov wrote:
> Jerry Stuckle wrote:
> 
>> As I've said before - good programmers can write good code in any
>> language.
> 
> Yes, they can. But it may be harder to do for them in one language and 
> easier in another.
> 
> Ivan

Not for a good programmer it isn't.  I've known a few good programmers 
in my 40+ years of programming.  I've known a lot more poor programmers 
who think they're good.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From jjbutler88 at gmail.com  Sat May 24 08:34:25 2008
From: jjbutler88 at gmail.com (jjbutler88 at gmail.com)
Date: Sat, 24 May 2008 05:34:25 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com> 
	<2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com> 
	<369c3d5f-69e0-4609-9638-f75c7af94a4e@t12g2000prg.googlegroups.com>
Message-ID: <d4040570-fe3f-47c5-ac6c-d68e2740feca@z72g2000hsb.googlegroups.com>

On May 22, 8:20?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 23, 5:06 am, jonbutle... at googlemail.com wrote:
>
> > Nope, this is my first experience with object oriented programming,
> > only been learning python for a few weeks but it seemed simple enough
> > to inspire me to be a bit ambitious. If you could hook me up with some
> > good docs that would be great. I was about to but a book on python,
> > specifically OO based, but il look at these docs first. I understand
> > most of the concepts of inheritance, just not ever used them before.
>
> Ah, okay, I'm really sorry, if I'd known I would've tried to explain
> things a little differently :)
>
> Mark Pilgrim's Dive Into Python is a really good place to start:http://www.diveintopython.org/toc/index.html
>
> For a quick overview of object oriented programming in Python, try:http://www.freenetpages.co.uk/hp/alan.gauld/
> Specifically:http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm
>
> But don't hesitate to ask questions here or even contact me privately
> if you'd prefer.


Thanks for the help, sorry for the delayed reply, flew out to detroit
yesterday and the wifi here is rubbish. Will definitely get reading
Dive into Python, and the other article cleared a lot up for me.
Hopefully I wont have these errors any more, if I keep getting them il
get in touch.

Cheers


From ma.saeedi at gmail.com  Thu May  8 12:02:14 2008
From: ma.saeedi at gmail.com (Maryam Saeedi)
Date: Thu, 8 May 2008 11:02:14 -0500
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
Message-ID: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>

I was wondering if you know how can I run a python code once every five
minutes for a period of time either using python or some other program like
a bash script.

I have asked this question before and some of you answered me but I still
have problem. Most of the answers was to use cron and crontab which works on
my computer but not if I want to do it on department's computer since I do
not have permission to change those files. Is there any other way which does
not need administrator permission?

Thanks  a lot,

Maryam
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From afriere at yahoo.co.uk  Mon May 19 22:59:45 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 19 May 2008 19:59:45 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
Message-ID: <8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>

On May 20, 6:58 am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
> (snip)
>
> > The main
> > concept here: identity [usually] implies equality,
>
> I really enjoyed the "usually" disclaimer !-)

Well you have to be careful in case some smartarse comes back with a
class with something like this in it:

def __eq__ (self, other) :
    if self is other : return False

%)


From inhahe at gmail.com  Tue May 13 15:41:00 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 15:41:00 -0400
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>
Message-ID: <V7mWj.65254$%15.28939@bignews7.bellsouth.net>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:0563506d-bd36-404d-8961-4c4c5d1cc029 at t54g2000hsg.googlegroups.com...
> On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>> Any programming that helps you solve a problem is fun and
>> recreational. At least, that's how I look at it. I suppose it really
>> depends on why you're doing it, what your objective is, etc. But I'd
>> say, why not?
>
> You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> you can safely ignore its posts.

How does it generate text?




From vivainio at gmail.com  Mon May  5 14:31:21 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:31:21 GMT
Subject: [ANN] Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
	<mailman.409.1209648691.12834.python-list@python.org>
Message-ID: <prs0zjpl.fsf@gmail.com>

python at bdurham.com writes:

> I didn't find your language offensive but you might consider toning down
> your review of the Awesome Window Manager :)

Nah - keep up the bad attitude. Your (Zed) blog/articles are one of
the few things on the programmosphere that actually make me laugh
audibly.



From nagle at animats.com  Mon May 19 00:40:28 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 18 May 2008 21:40:28 -0700
Subject: New to Python, Discussion Groups.
In-Reply-To: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <48310199$0$34496$742ec2ed@news.sonic.net>

cmoller wrote:
> Hi,
> 
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
> 
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical. I am not in a hurry and would approach the problem as a way
> to learn.
> 
> The data I am processing is readily seen via telnet so I know it's
> there.
> 
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?

    This is certainly feasible, but you might find it faster to just buy
and use National Instruments LabView.

    I've done data logging from sensors over Ethernet, but used
QNX/Photon, which is useful if you want to do hard real-time
control, but overkill otherwise.

    You can certainly interface to sensors with Ethernet interfaces
from Python.  The difficulty of doing this depends on how well designed
the sensor output format is.  Some are awful.  Be aware of the need
for timeouts and the problems of dealing with devices which may be
turned off and on or which may not send when wanted.

					John Nagle


From paddy3118 at googlemail.com  Sun May 11 01:35:25 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:35:25 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org> 
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <e911a80b-8265-4159-808b-7c97e5887d99@x41g2000hsb.googlegroups.com>

On May 10, 9:56 pm, wxPytho... at gmail.com wrote:

> I have two another interesting things to discuss about, for which I'll
> open new posts on this group. Look for "Python doesn't recognize quote
> types" and "Python, are you ill?".

Hi,
You might try making your titles a little more descriptive to help
people filter/search on them.

- Paddy.


From wuwei23 at gmail.com  Tue May  6 07:18:02 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 6 May 2008 04:18:02 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <8db0155f-fde9-4760-b7a0-12ece5023100@j33g2000pri.googlegroups.com>

On May 6, 4:43 am, notbob <not... at nothome.com> wrote:
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
>     print bruce, bruce
> ****ME****
> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

Did you copy the function definition into chap03.py? Because the error
sounds a lot like you're trying to import something from an empty
file.

I think you may have missed the following line that occurs in the
paragraph just before the import example: "To see how this works,
assume the print_twice function is defined in a script
named chap03.py."

If you copy the code provided for 'print_twice' into your 'chap03.py'
file, the example should work.

Hope this helps.

- alex23


From fuzzyman at gmail.com  Sat May 24 13:02:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:02:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
Message-ID: <b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>

On May 24, 4:56?pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> Fuzzyman <fuzzy... at gmail.com> writes:
> > The 'we told you not to use that' approach, when applied to paying
> > customers doesn't really work... all they see is that you broke
> > their spreadsheet code by changing your API.
>
> And the customer point of view is quite reasonable - they have a job
> to do, and a limited timeframe; sometimes accessing privates directly
> is much better than waiting for updates from vendor. Bad designs (as
> far as choosing publics goes) happen.


They will use whatever they find, whether it is the best way to
achieve a goal or not. Once they start using it they will expect us to
maintain it - and us telling them it wasn't intended to be used by
them in the first place won't cut it.


>
> Even if their softare breaks on upgrade, you can quite clearly point
> out that they used an internal api - and they will keep on using the
> old version until they solve the problem. Everybody wins.
>

Not if they are waiting for a fix or new feature in the upgrade - and
we can't refactor because they are relying on APIs that we want to
remove.

We very much lose.


> Perhaps a lint-like validation tool would be optimal for this
> problem...

So we can refuse to execute their code if they use private APIs?

Proxying so that we can really hide our internal APIs is a better
solution.

This hasn't happened to us yet (our application has only been in
commercial use since January), but it is one of the reasons that
Microsoft's COM APIs grew so wide and wild, and caused them very real
problems in trying to improve them. We are keen to avoid the same
situation.

Michael Foord
http://www.ironpythoninaction.com/


From geonomica at gmail.com  Fri May 23 19:48:27 2008
From: geonomica at gmail.com (gianluca)
Date: Fri, 23 May 2008 16:48:27 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
	<f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>
	<slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <ce293364-7aef-4c43-8504-5ae353c49406@e39g2000hsf.googlegroups.com>

On 23 Mag, 12:30, Nick Craig-Wood <n... at craig-wood.com> wrote:
> gianluca <geonom... at gmail.com> wrote:
> >  On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > > > exception like this:
>
> > > > Traceback (most recent call last):
> > > >   File "<pyshell#18>", line 1, in <module>
> > > >     myDLL.myFUNCT()
> > > >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> > > >     func = self.__getitem__(name)
> > > >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> > > >     func = self._FuncPtr((name_or_ordinal, self))
> > > > AttributeError: function 'myFUNCT' not found
>
> > > Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> > > chance you compiled your C as C++ and name mangling kicked in?
>
> > > Can you show a minimal C source for a DLL, how you compiled it, what you
> > > did on the Python side to call it, and how it fails?
>
> > > Ciao,
> > >         Marc 'BlackJack' Rintsch
>
> >  I've located my dll in c:\windows\system32 (in linux I aven't any
> >  problem) and I compiled it with dev-c++. The source code is C standard
> >  ANSII and is quite havy. If you like I can send it via mail (you can
> >  realy at geonom... at gmail.com) . I've tryed to build a wrape with swig
> >  olso with same code and I can access at all the function.
>
> You can use objdump from mingw or cygwin to look inside the dll and
> see exactly what it is exporting, eg
>
> objdump -x OurSharedCodeLibrary.dll
>
> This prints a great deal of stuff!  In the middle you'll see
>
> [snip]
> The Export Tables (interpreted .rdata section contents)
> [snip]
> Ordinal/Name Pointer] Table
>         [   0] OSCL_DEBUG_fakeInitComplete
>         [   1] OSCL_close
>         [   2] OSCL_displayIdent
>         [   3] OSCL_getCurrentDynamicParams
>         [   4] OSCL_getCurrentStaticParams
>         [   5] OSCL_getErrorString
>         [   6] OSCL_getIdent
> [snip]
>
> This is a dll we used in a project, and those names exactly worked
> with ctypes, eg some snips from the ctypes code
>
>         self.dll = cdll.LoadLibrary("OurSharedCodeLibrary")
>         self.dll.OSCL_getErrorString.restype = c_char_p
>
>     def getErrorString(self, status):
>         return self.dll.OSCL_getErrorString(c_int(status))
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Thank you for help!
I've done all you suggest and I've a objdump output like this:
...
[ 86](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003755 _IsCoverRelD
[ 87](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003657 _IsCoverRelA
[ 88](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x000034f5 _IsCoverDX
[ 89](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x0000341b _IsCoverA
[ 90](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003072 _CoreRelD
[ 91](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00002f5e _CoreRelA
...
my funtions are the __IsCoverRelD, __IsCoverRelA, etc but when I call
it (myLIB.__IsCoverRelA or myLIB.__IsCoverRelA()) I've the same
problem.
Hy
gianluca


From mr.edel at gmx.at  Thu May 29 12:17:13 2008
From: mr.edel at gmx.at (Matt)
Date: Thu, 29 May 2008 16:17:13 +0000
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
	<slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>
Message-ID: <g1mku3$ghu$1@aioe.org>

Okay, thanks a lot for your reply Nick, I think you pushed me back on 
the right way.

Now I started with trying to implement the callback functions and am 
stuck at the following point:

I define my classes/structures/unions:

------------------------------CODE-----------------------------------------

class cdStream(Structure):
     _fields_ = [("contextH", c_uint),
                      ("open", c_void_p),
                      ("close", c_void_p),
                      ("read", c_void_p),
                      ("write", c_void_p),
                      ("seek", c_void_p),
                      ("tell", c_void_p)]

class memunion(Union):
     _fields_ = [("lpszFileName", c_char_p),
                      ("pStream", cdStream)]


class cdStgMedium(Structure):
     _fields_ = [("Type", c_uint),
                      ("u", memunion)]

------------------------------\CODE----------------------------------------

then i define my functions (right now I do just nothing) and at the same 
time I define the datatypes like they're listed in my C sample program:


------------------------------CODE-----------------------------------------

def pystreamopen (contextH, mode, pErr):
     pass

cstreamopen = CFUNCTYPE(c_uint, c_ushort, c_uint)

def pystreamclose (contextH, pErr):
     pass

cstreamclose = CFUNCTYPE(c_uint, c_uint)

def pystreamread (contextH, pBuf, pBufsize, pErr):
     pass

cstreamread = CFUNCTYPE(c_uint, c_void_p, c_uint, c_uint)

def pystreamtell (contextH, pErr):
     pass

cstreamtell = CFUNCTYPE(c_uint, c_uint)

def pystreamwrite (contextH, origin, offset, pErr):
     print "writing..."
     pass

cstreamwrite = CFUNCTYPE(c_uint, c_void_p, c_uint, c_uint)

------------------------------\CODE----------------------------------------

and now the problem starts: i want the pointers in the cdStream 
Structure point at my functions and tried to do it the following way:


------------------------------CODE-----------------------------------------

data = cdStgMedium()
data.type = 0
data.u.pStream.contextH = c_uint(3) #must be some kind of identifier.
data.u.pStream.open = cstreamopen(pystreamopen)
data.u.pStream.close = cstreamclose(pystreamclose)
data.u.pStream.write = cstreamwrite(pystreamwrite)
data.u.pStream.tell = cstreamtell(pystreamtell)
data.u.pStream.read = cstreamread(pystreamread)

------------------------------\CODE----------------------------------------

unfortunately that doesn't work because Python returns a TypeError: 
incompatible types, CFunctionType instance instead of c_void_p instance

Any ideas/help (please)?

Best regards,
Matt




From inhahe at gmail.com  Thu May 22 13:33:50 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:33:50 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <t6iZj.78706$%15.8745@bignews7.bellsouth.net>

I don't get what the issue is between sites that use Python and being slow, 
if there is one, because there's a website online that shows the results of 
a dozen or so benchmarks when comparing any two languages.  Python beats PHP 
in almost all the benchmarks.  (it also beats almost all the other languages 
(they're all scripting languages) in most of the benchmarks, lua being the 
only exception i remember.)

"cm_gui" <cmgui2 at gmail.com> wrote in message 
news:a725111b-0dce-4923-861a-b7138af602a1 at k10g2000prm.googlegroups.com...
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast. 




From mszpadzik at gmail.com  Fri May 30 06:49:10 2008
From: mszpadzik at gmail.com (Mike)
Date: Fri, 30 May 2008 03:49:10 -0700 (PDT)
Subject: Python threads and memory usage
References: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>
	<n8adnVRcIvt7NKLVnZ2dnUVZ_vSdnZ2d@earthlink.com>
	<2baa96da-be9b-493f-8d8f-156a4cce763d@z72g2000hsb.googlegroups.com>
Message-ID: <9efb0468-f3df-4a03-a064-7f83e4c45403@e53g2000hsa.googlegroups.com>

On May 30, 9:42?am, Mike <mszpad... at gmail.com> wrote:
> On May 30, 9:16?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
> > On Thu, 29 May 2008 12:01:30 -0700 (PDT), Mike <mszpad... at gmail.com>
> > declaimed the following in comp.lang.python:
>
> > > I observed, that every thread reserved some memory, and after exit
> > > thread doesn't freed it. When i leaved my server working for 3 days,
> > > then it takes 15% of 512MB memory (during that time about 15000
> > > threads were created and stopped). When server starts it only takes
> > > about 1% of memory.
>
> > ? ? ? ? Do you have any outstanding references to the threads? If so, have
> > you performed a .join() with the thread? Until you join it, the thread
> > state (thread local objects/"variables") are probably being held for
> > access from outside the thread.
> > --
> > ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> > ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? wulfr... at bestiaria.com
> > ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> > ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> > ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/
>
> I'm joining threads only during my program exit. I'll try to do what
> You suggest.
>
> THX

It helped. Now all threads are added to thread list and every some
period of time I'm checking which threads are alive (enumerate), and
joining all which aren't. Now [memory usage is still on 1% :D:D:D

Thanks


From kw at codebykevin.com  Sat May 10 11:42:29 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:42:29 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.902.1210433160.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
Message-ID: <4825C265.90106@codebykevin.com>

Guilherme Polo wrote:
> 2008/5/10 Zentrader <zentraders at gmail.com>:
>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>> extension for additional widgets, and TkTable and/or TableListWrapper.
>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
> 
> There is also Tile, or Ttk since Tk 8.5, if you are interested in
> extensions too.
> Apparently there are three Tile wrappers now, two are incomplete
> (sorry for saying that):
> 
> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
> of ttk styling, maybe other things and it is not only a ttk wrapper
> (there are other things besides it)
> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
> Treeview, big part of ttk styling and maybe something else.
> 
> And there is also one I'm doing, that I expect to be complete:
> 
> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
> 
> Documentation and samples are still lacking, but I'm working on them.
> And I haven't tested it under Windows, so I invite you all to test it.
> 
> Regards,
> 
I'm the maintainer of Tile.py. It may well be incomplete, as it was 
first developed by Martin Franklin a couple of years ago and I've been 
modifying it as my own needs require.

So you're doing your own implementation of ttk in Tkinter as a Google 
Summer of Code Project? Wonderful! Are you planning on submitting it for 
including in Tkinter's core, as I did? If yours proves to be the better 
implementation I'll gladly withdraw mine, as I'm not sure I have time to 
overhaul it extensively.

I'll follow your progress with interest!

--Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From johnjsal at NOSPAMgmail.com  Tue May 13 00:01:59 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 04:01:59 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au>
Message-ID: <482912b7$0$11641$607ed4bc@cv.net>

Ben Finney wrote:

> I think that the idiom
>
>     for unused in xrange(10):
>         # do stuff with no reference to 'unused'
>
> is quite common. Is that what you're asking about?

Yes. I was more or less asking about the specific situation of using a
for loop to do something X number of times, but I think the more
generalized problem that everyone is talking about -- using a counter
variable that is never referenced in the loop -- probably puts the point
I was trying to make in a better light.

The reason I even brought this up is because I remember someone saying a
while back (probably here on the newsgroup) that the true use of a for
loop was to iterate through a sequence (for the purpose of using that
sequence), not to do something X number of times. Once they made this
comment, I suddenly saw the for loop in a new (and I believe purer)
light. That was the first time I realized what it was really meant
to do.

Using something like:

for unused in xrange(10):
    # do stuff 10 times

suddenly seemed to me like a hackish way to replace

for (int i=0; i<10; i++) {
    // do stuff 10 times;
}

Not that I think the above code (C#) looks all that elegant either. But
in C# there is a distinction between the above, and this:

foreach (int i in sequence)
    // do something;

which is more closely related to the Python for loop.

Now, you could easily make the argument that the Python for loop is a
much simpler tool to accomplish *both* of the above, and I suppose that
makes sense. Seems a little silly to have two separate for loops to do
these things. I just wasn't sure if the "counter" version of the Python
for loop was considered slightly unpythonic.


From aahz at pythoncraft.com  Sat May  3 16:01:14 2008
From: aahz at pythoncraft.com (Aahz)
Date: 3 May 2008 13:01:14 -0700
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
Message-ID: <fvigaa$bdc$1@panix3.panix.com>

In article <mailman.494.1209791508.12834.python-list at python.org>,
Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
>I can't believe some angry responses in this thread - it's just a  
>technical question, not about which is the best team in the [preferred  
>sports here] National Championship...

http://www.netfunny.com/rhf/jokes/91q3/usolym.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From jcd at sdf.lonestar.org  Tue May 13 08:15:55 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 13 May 2008 08:15:55 -0400
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <1210680955.6481.7.camel@jcd-desktop>

On Tue, 2008-05-13 at 03:28 -0700, dannywebster at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
> 
> so far:
> 
> >>> f=os.open("./get_hostnames").readlines
> 
> returns ['host1 host2 host3 ... hostN\n]'
> 
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
> 
> >>> f=str(f)
> >>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]
> 

Instead of casting to a string, each element of your list is already a
string, so use that instead:

f = open("get_hostnames")
?hosts =[]

# gets each string one at a time.
for line in f:
    # get rid of the pesky \n at the end
    line = line.strip()
    # separate the hostnames into a list
    hosts += line.split(' ')

> Any help is highly appreciated
> 
> ta
> 
> dan.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From stanc at al.com.au  Tue May 13 05:42:13 2008
From: stanc at al.com.au (Astan Chee)
Date: Tue, 13 May 2008 19:42:13 +1000
Subject: threads problem in python
Message-ID: <48296275.9090602@al.com.au>

Hi,
I have 2 classes in python, the first one runs first and and then the 
first one calls the second class. I want it to run the second class as a 
separate thread but I want the first one to wait until the second class 
is dead.
Im having problem in both killing the second class when its done and 
making the first class wait for it to finish.
Im very confused on doing threads in python.
Thanks for any help.
Astan

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
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From gagsl-py2 at yahoo.com.ar  Mon May 19 09:29:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 10:29:04 -0300
Subject: pickle internals
References: <f46c52560805190352ycb62d5dtdad84d55da81bf9d@mail.gmail.com>
Message-ID: <op.ubek2q0jx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 19 May 2008 07:52:25 -0300, Rustom Mody <rustompmody at gmail.com> escribi?:

> I am trying to understand pickle internals.
> This involves:
> -- the algorithm(s) used for traversal arbitrary structures
> -- the pickle format
> -- the use if any of introspection
>
> I'll be thankful for any pointers

Use The Source, Luke!
See pickle.py and pickletools.py - you may post here any questions you have then.

-- 
Gabriel Genellina



From aisaac at american.edu  Thu May  8 10:50:17 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 14:50:17 GMT
Subject: observer pattern question #2 (notification chain)
Message-ID: <JqEUj.52492$Bb3.45491@trnddc01>

I have two questions about the "observer pattern" in Python.

This is question #2.  (I'll put the other is a separate post.)



Consider this standard example of the observer pattern in Python:



<URL:http://en.wikipedia.org/wiki/Observer_pattern>



Now suppose I have a variant.

(I am not a programmer, so this may be a separate related pattern.)

To make it a little concrete and relate it to the discussion at

<URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>,

suppose there are stocks, mutual funds, and investors.

Let us say that funds are observers for stocks,

and investors are observers for funds.

Once a "month" I want all stocks to notify their observing funds

of their end-of-month price, and *then* all fund to notify their

observing investors of their end-of-month investment value.



I see a couple differences from the standard pattern referenced above,

and one problem.



Differences:



- observer/subject linked hierarchy (funds are both observers and subjects)

- many-many relation (a fund is an observer of many stocks)



I think (?) these differences are inessential, but the 

second does create the following problem: if I do not want 

a fund to notify an its investors until all stocks have 

reported, what is the best way to determine the "last report 

in" event?



Here is one way: create a ``reportreceived`` dict that maps 

stocks to True or False, and after each stock notification 

change False to True and check ``all(reportreceived.values())``

to determine whether it is ok to notify investors.  When it 

is ok, then notify investors and reset all the

``reportreceived`` values.



This is meant to be a general description so please do not 

focus on the "real world" aspects, which are only for 

illustration.



Thank you,

Alan Isaac 


From tdelaney at avaya.com  Tue May 27 21:09:05 2008
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 28 May 2008 09:09:05 +0800
Subject: Misuse of list comprehensions?
In-Reply-To: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>

Ian Kelly wrote:

> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
> 
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

Are you aware that filter() returns a list populated from its arguments?

Tim Delaney


From lists at cheimes.de  Fri May  2 15:41:36 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:41:36 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481B6E70.7000503@cheimes.de>

Brendan Miller schrieb:
> Hi,
> 
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.

import os
null = open(os.devnull, "wb")

:)

Christian


From squareswallower at 1ya2hoo3.net  Sat May 17 11:58:58 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Sat, 17 May 2008 09:58:58 -0600
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
	<0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
Message-ID: <g0mvc2$sic$1@news.xmission.com>

On 2008-05-17 06:01:01 -0600, bearophileHUGS at lycos.com said:

> dave, few general comments to your code:
> - Instead of using a comment that explains the meaning of a function,
> add such things into docstrings.
> - Your names can be improved, instead of f you can use file_name or
> something like that, instead of convert_file you can use a name that
> denotes that the conversion is already done, etc.
> - You can use xrange instead of range and you can indent less, like 4
> spaces.
> - This line may be slow, you may want to find simpler ways to do the
> same thing:
> rkey = random.choice(analyze.keys())
> - I suggest you to add doctests to all your functions.
> 
> Bye,
> bearophile


bear,
thanks for the suggestions.  I use IDLE to write the code and when it's 
working I paste it over into a new window.  I'll tabify before saving 
the pasted code.  To add doctests would I need to use a certain 
filename for the tests to be run on?  Can you have doctests on random 
functions?

Thanks

Dave



From pistacchio at gmail.com  Wed May  7 09:40:29 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 15:40:29 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
Message-ID: <fvsbgf$mev$1@aioe.org>

Diez B. Roggisch ha scritto:
> pistacchio wrote:
> 
>> Mike Driscoll ha scritto:
>>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>>> my server side needs but i can't seem to find what i'm looking for. for
>>>> most of my php work i use mysql and tinyButStrong
>>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>>> engine that offers powerful functionalities. you insert TBS tags in web
>>>> pages like:
>>>>
>>>> <div align="center" class="title-page"> [var.x] </div>
>>>>
>>>> and it replaces [var.x] with the value of global variable x. it also
>>>> makes blocks (and nested blocks) easy to implement:
>>>>
>>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>>> [blk1;block=end] </p>
>>>>
>>>> in the previous code it cycles throu all the values of the array blk1.
>>>>
>>>> it does many more things, like htlm escaping, url and js encoding etc,
>>>> conditional displaying etc, but it is not more confusing that inserting
>>>> pieces of code into the HTML (aka: littering the code and kissing
>>>> goodbye to the code/presentation separation). it comes in the form of a
>>>> single file with a single class that you can easily include in the code
>>>> and go.
>>>>
>>>> now, i've searched the net and it seems full of python-based frameworks
>>>> for doing server side scripting and templating, but none that suits my
>>>> needs.
>>>>
>>>>     1. i like writing code and i like control. i mean, open up the
>>>> simplest text editor and write in it. i don't want something that is
>>>> command-line driven or that writes code for me like ">>>
>>>> makePagesFromThisDatabase()".
>>>>     2. i want something very lightweight. i don't want dozen of options,
>>>> pre-made blogging parts ecc. i just need a good non invasive template
>>>> engine and the basic functions for server side scripting, like session
>>>> managing, request parsing, functions to manipulate html code (encodings
>>>> etc)
>>>>     3. i don't want to beg my hosting provider to install the libraries.
>>>> a simple include file should do the work.
>>>>     4. object oriented programming is not required (better: i prefer
>>>> plain old procedural programming).
>>>>
>>>> any help? thanks in advance
>> hi, thanks for replaying
>>
>>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>>> and Genshi in 2.x (I think) for templating purposes. There's also
>>> Cheetah, one of the more powerful Python templating engines out there.
>>>
>> django is exacly the kind of giant i'm trying to avoid
>>
>>> http://genshi.edgewall.org/
>> the first lines of the tutorial read:
>> "First, make sure you have CherryPy 3.0.x installed"
>> Now, cherrypy is something that is not properly "include a file and get
>> going!"
>>> http://www.kid-templating.org/
>> kid seems to have a non-linear approach, but i may give it a try
>>
>>> http://www.cheetahtemplate.org/
>> cheetah was something that i already considered using. have i to
>> "install" it or can i just import it?
> 
> You will need to install any of these. It is part of how python is designed.
> Extendability comes with a price-tag.
> 

well, the problema is exacly that i'm looking for a python module, not 
for a python library.
most of the tasks i need are just:
1. on the shoulders of the existing standard cgi modules, automate an 
render easier the handling of things such as sessions and requests
2. on the shoulders of the existing standard regex module, have a simple 
but complete templating engine and html-related encoder


From ian.g.kelly at gmail.com  Tue May 27 23:42:17 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 21:42:17 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>
References: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
	<E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>
Message-ID: <3fc761710805272042v19f06bd5kb39ab85c57b8278b@mail.gmail.com>

On Tue, May 27, 2008 at 7:09 PM, Delaney, Timothy (Tim)
<tdelaney at avaya.com> wrote:
> Ian Kelly wrote:
>
>> It sounds like the wasteful list creation is the biggest objection to
>> using a list comprehension.  I'm curious what people think of this
>> alternative, which avoids populating the list by using a generator
>> expression instead (apart from the fact that this is still quadratic,
>> which I'm aware of).
>>
>> def compress(s):
>>    new = []
>>    filter(None, (new.append(c) for c in s if c not in new))
>>    return ''.join(new)
>
> Are you aware that filter() returns a list populated from its arguments?

Yes.  In this case, it returns an empty list.


From ivan.illarionov at gmail.com  Sat May  3 07:58:28 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 11:58:28 +0000 (UTC)
Subject: How to use a parameter in a class
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <fvhk14$vjf$1@news.mtu.ru>

On Sat, 03 May 2008 03:05:31 -0700, Decebal wrote:

> I have the following class:
> #####
> class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
> 
>     def testing(self):
>         print 'In test: %d' % self.value
> 
>     def returnValue(self):
>         return self.value
> 
>     result = someFuntion(default = value)
> #####
> 
> But the last line does not work.
> I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
> 
> And that someFunction gets a default value of 12. How can I do that?

class Dummy(object):
    def __init__(self, thisValue):
        self.value = thisValue

    def someFunction(self, default=None):
        if default is None:
            default = self.value

-- 
Ivan


From sjmachin at lexicon.net  Sat May 10 17:59:12 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 14:59:12 -0700 (PDT)
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <c3d669f9-10d1-45d6-9b65-ccfc80b512ce@k1g2000prb.googlegroups.com>

On May 11, 6:56 am, wxPytho... at gmail.com wrote:
> There's a thing that bugs me in Python. Look at this...
>
> >>> print "Testing\"
>
> SyntaxError: EOL while scanning single-quoted string
>
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?

Read this:
http://docs.python.org/ref/strings.html

Try each of these:
print 'Testing
print 'Testing\'
print 'Testing\'Testing
print 'Testing'
print 'Testing\''
print 'Testing\'Testing'

There's a wrinkle that's common to both your questions: \" causes the
" not to be regarded as (part of) the end marker but to be included as
a data character. Similarly with '. Examples:

>>> print "She said \"Hello!\""
She said "Hello!"
>>> print 'His surname is "O\'Brien"'
His surname is "O'Brien"
>>>

In the error message, "quoted" is the past tense of the verb "to
quote", meaning to wrap a string of characters with a leading string
and a trailing string to mark the contained string as a lexical item,
typically a string constant. The message is intended to convey that
the leading marker has been seen, but an EOL (end of line) was reached
without seeing the trailing marker.

A better error message might be something like "String constant not
terminated at end of line".

Unfortunately the above-mentioned documentation uses xxxxle-quote as a
noun to describe characters -- IMHO this is colloquial and confusing;
it should call ' an apostrophe, not a "single-quote", and all " a
quote, not a "double-quote". The confusion is compounded by referring
to '''abc''' and """xyz""" as triple-quoted strings ... so one might
expect 'abc' and "xyz" to be called "single-quoted strings", and this
sense is what is being used in the error message.

HTH,
John




From kevinw2 at bigpond.com  Sat May 31 08:35:50 2008
From: kevinw2 at bigpond.com (kevin)
Date: Sat, 31 May 2008 22:35:50 +1000
Subject: driver detective crack keygen
In-Reply-To: <280ae4fc-6a59-4f11-9f62-58d4f0fa45c0@w74g2000hsh.googlegroups.com>
References: <280ae4fc-6a59-4f11-9f62-58d4f0fa45c0@w74g2000hsh.googlegroups.com>
Message-ID: <48414626.8080903@bigpond.com>

Hi i was wondering if you did find a keygen or crack for driver 
detective if so could you please help me in my serach for the same . kevin



From vginer at gmail.com  Sat May 17 20:53:50 2008
From: vginer at gmail.com (Vicent Giner)
Date: Sat, 17 May 2008 17:53:50 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca>
Message-ID: <aeb5e592-8dbc-4640-a8d7-eed869e4c024@i76g2000hsf.googlegroups.com>


>
> The usual answer is that development
> time is more important than running time.

OK, thank you for your answer.

I just wanted to check if it was a naive idea trying to use Python
instead of C in order to implement my own algorithms, and other
research-related code.


>
> Since you are likely to be using arrays,
> you might look at numpy, where the
> number crunching is using compiled C code.

NumPy seeems to be a very interesting and powerful package. Thank you
again.


>
> Try Google with Python and your area of
> interest.  You could well find
> Python-based packages which meet your needs.
>

Yes, I've been giving a try, and I've found some interesting links.

Thank you!

--
Vicent


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From kaka_ilkay at hotmail.com  Thu May 29 03:11:25 2008
From: kaka_ilkay at hotmail.com (kanarya)
Date: Thu, 29 May 2008 07:11:25 -0000
Subject: Anyone using TestNG
Message-ID: <BLU114-DAV23283990ABDFCD00B00D3E6BF0@phx.gbl>

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From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:17:03 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:17:03 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
Message-ID: <482be363$0$25765$426a34cc@news.free.fr>

vbgunz a ?crit :
> I remember learning closures in Python and thought it was the dumbest
> idea ever. Why use a closure when Python is fully object oriented? I
> didn't grasp the power/reason for them until I started learning
> JavaScript and then BAM, I understood them.
> 
> Just a little while ago, I had a fear of decorators because I really
> couldn't find a definitive source to learn them (how to with with @).
> How important are they? They must be important otherwise why have'em
> in the language? I had to learn'em and then suddenly, BAM. I
> understand them.
> 
> My main issue with closures and decorators was hidden in the fact of
> how *dead simple* they were. All I needed were reasons to use them
> over doing it X style. So what is my point? How dead simple are class
> methods? 

Way dumber than closures and HOFs (which is what 'decorators' are when 
you take back the @syntactic sugar).

A classmethod is simply a method that works on the class itself - it 
takes the class as first argument, instead of taking the instance.

> I must be missing there point so I am convinced they must be
> dead simple.
> 
> classes, functions, instance and static methods are easy. So easy in
> fact, I could shoot myself in the foots without looking (preferably
> without aiming). So, why am I stuck on the *idea* of a class method?

Could it be because you don't see the implication of classes being 
objects too ?

> An instance method works on the instance
> A Static method is basically a function nested within a class object
> A class method is overkill?

Nope. It's sometimes pretty usefull.

> I can call a static or class method through either the class OR any
> instance of it. I've never designed a method that took advantage of
> the class name except in cases where I needed to extend a super class
> *but* even in this case, I didn't use the enclosing class name...

s/name//g

What you have is the class *object*, not the class name.

> Whats the deal with class methods, why use them over anything else?
> What does a class method accomplish in at least one line shorter than
> anything else? Does it help reduce duplication or typing? I am at a
> lost for words that can shed at least *one* good reason to use them.
 > What is the one greatest reason to use them?

Factory methods (alternate constructors...) is probably the most obvious 
use case. You need to get at the class to instanciate it, don't you ? An 
example of this pattern is dict.fromkeys().

You'll find a more elaborate example here too:
http://groups.google.fr/group/comp.lang.python/browse_frm/thread/65868e8a12bcf375/a31bb0e13bf09316#a31bb0e13bf09316

HTH


From dullrich at sprynet.com  Mon May 26 05:53:08 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 26 May 2008 04:53:08 -0500
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
	<loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>
	<79478cee-4bc6-426f-9e64-04841aee1f3d@k37g2000hsf.googlegroups.com>
Message-ID: <mu1l34d26du99tpbvei0nua234t0ujkica@4ax.com>

On Sun, 25 May 2008 05:56:37 -0700 (PDT), ulrich at dorda.net wrote:

>Thanks a lot to all!
>
>Apart from obtaining the solution I was searching for, I learned a lot
>by studying your answers!

Since my solution seems to have been the one you were looking
for (I was surprised nobody else suggested it) maybe I should
enphasize that people better informed than me had the same
reaction as I did to your question:

While this is something you can do if you want it's reallly hard
to see why it's a good idea - simply passing data to functions
in the other unit as parameters seems better.

>Cheers,
>
>Ulrich

David C. Ullrich


From casey.mcginty at gmail.com  Sun May 25 18:07:19 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 12:07:19 -1000
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <ae3f58470805251507m3f9c6br828b2e8bfe06c7b8@mail.gmail.com>

http://art.gnome.org/
http://www.gnome-look.org/
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From byte8bits at gmail.com  Thu May 15 13:27:11 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 15 May 2008 13:27:11 -0400
Subject: Pass data from Python to C++
Message-ID: <g0hrq3$rfb$1@solaris.cc.vt.edu>

I have some c++ binaries that do rather intense number computations. 
They do it well and rather quickly compared to other languages (not just 
Python). An example:

> brad at qu:~/$ date && ./compute.cpp.o < 1_million.txt > /dev/null && date
> Thu May 15 13:08:28 EDT 2008
> Thu May 15 13:08:31 EDT 2008
> brad at qu:~/$ date && python compute.py < 1_million.txt > /dev/null && date
> Thu May 15 13:08:38 EDT 2008
> Thu May 15 13:14:50 EDT 2008

In this case, c++ does one million things in 3 seconds that Python takes 
more than 6 minutes to do. The one million is a minimum. At times the 
computations are in the billions. This is why c++ was chosen.

However, other components can be written in a more user friendly, more 
easily maintained language. We've chosen Python for this. The main 
question now is how to pass the computationally heavy info to c++ from 
within Pyhton. os.system is not ideal. Just wondering how other folks do 
this? I have source to some of the c++ code, but some of it is in binary 
from only. It can take stdin or arguments.

Thanks for any tips,

Brad



From wxPythoner at gmail.com  Sun May 11 04:02:15 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 01:02:15 -0700 (PDT)
Subject: Unimport statement
Message-ID: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>

We should have that statement, so that problems, expressed in
http://groups.google.com/group/comp.lang.python/browse_thread/thread/3bda1fc4895ec886/bc5fe40cfbd10124?lnk=raot#bc5fe40cfbd10124,
would not occur.


From ralf at schoenian-online.de  Thu May  1 10:17:12 2008
From: ralf at schoenian-online.de (=?ISO-8859-1?Q?Ralf_Sch=F6nian?=)
Date: Thu, 01 May 2008 16:17:12 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
Message-ID: <4819d093$0$6552$9b4e6d93@newsspool3.arcor-online.net>

idev schrieb:
> Hi all,
> Please help me with my stuff.
> 
> I downloaded python 2.5.1 package from http://blastwave.org it was
> compiled using Sun Studio 11 for Solaris 8 sparc.
> 
> My system is Solaris 10 sparc and I compiled using SunStudio 11
> psycopg2 python binding for PostgreSQL 8.3.1.
> 
> Compilation was OK, but when I am trying to import psycopg2 I am
> getting this error:
> 
> $ python
> Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import psycopg2
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
> 60, in <module>
>     from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
> ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
> lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> referenced symbol not found
> 
> Any suggestions or help will be appreciated.

Hi,

maybe a stupid question - but why don't you want to use the "official" 
package? You can download it here: 
http://sunfreeware.mirrors.tds.net/indexsparc10.html

Regards,
Ralf


From agustin.villena at gmail.com  Wed May 21 19:45:49 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Wed, 21 May 2008 16:45:49 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
Message-ID: <6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>


> And not that useful - why would one care about the function being
> defined in class X or Y when one have the exact file and line ?

I have 3 reasons:

1) My developing time is expended running unit tests and browsing
tracebacks to find which is the real problem. Knowing the offender
class (instead of the method alone) makes me understand more quickly
which component of my software is failing.
2) There are some ocassions where I only have the traceback (e.g. when
analyzing an app's log) and no inmediate access to teh source code
3) And finally, for completeness: If a function is really a method, if
the traceback show only its name and not the class that defines it,
for me its a bug, because the method name has no sense out of its
class.

Just my two cents

Agustin



From mnordhoff at mattnordhoff.com  Sun May 18 23:55:17 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Mon, 19 May 2008 03:55:17 +0000
Subject: Get all the instances of one class
In-Reply-To: <2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
Message-ID: <4830FA25.5000806@mattnordhoff.com>

Tommy Nordgren wrote:
> class MyClass : a_base_class
>       memberlist=[]
> 
> #  Insert object in memberlist when created;
> #  note: objects won't be garbage collected until removed from memberlist.

Just to say, if you wanted to go about it that way, you could avoid the
garbage collection problem by using weakrefs:

<http://docs.python.org/lib/module-weakref.html>
-- 


From castironpi at gmail.com  Thu May 15 20:40:15 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 17:40:15 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
	<mailman.1200.1210896482.12834.python-list@python.org>
Message-ID: <e742ff24-d76b-422c-9284-f6eddeb1789e@34g2000hsf.googlegroups.com>

On May 15, 7:07?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> >> Why can't I write this?
> >> --
> >>http://mail.python.org/mailman/listinfo/python-list
>
> > yield recieved.
>
> > Thanks.
>
> Should that be
>
> ack yield
>
> ?

I'd be putting parachutes on people's screens, but on a newsgroup.  I
might have time-parachutes too: something that lands softer.


From squareswallower at 1ya2hoo3.net  Sat May 31 20:43:10 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Sat, 31 May 2008 18:43:10 -0600
Subject: Bring object 'out of' Class?
Message-ID: <g1srau$gn2$1@news.xmission.com>

Hello,

I'm currently on the class section of my self-taught journey and have a 
question about classes:  is it possible to bring a object created 
inside the class definitions outside the class so it can be accessed in 
the interpreter?

For example, right now I'm working (within Allen Downey's Python 
Programmer book) with creating a 'hand' of cards.  I want to be able to 
deal to 'x' amount of cards to 'x' amount of hands and then be able to 
manipulate those hands afterwards.  I'm not sure if even what I'm 
asking is possible or if I'm getting ahead of myself.

As always, thanks for all your help.  My learning is greatly enhanced 
with everyone's input on this board.  Please feel free to 
comment/critique the code...

Here is the section of code that deals hands (but doesn't do anything 
past that):

    def deal_cards(self, num_of_hands, num):
        '''deals x amount of cards(num) to each hand'''
        for i in range(num_of_hands):
            handname = Hand('hand%d' % i)
            self.deal(handname, num)
            print '::::%s::::' % (handname.label), '\n', handname, '\n'



and here is the all of the code:

#!/usr/bin/env python

import random

class Card:
    """represents a playing card
    attributes: rank, suit"""

    def __init__(self, suit=0, rank=3):
        self.suit = suit
        self.rank = rank

    suit_names = ["Clubs", "Diamonds", "Hearts", "Spades"]
    rank_names = [None, "Ace", "Two", "Three", "Four", "Five", "Six", "Seven",
                  "Eight", "Nine", "Ten", "Jack", "Queen", "King"]

    def __str__(self):
        #prints card in format: Rank 'of' Suit#
        return '%s of %s' % (Card.rank_names[self.rank],
                            Card.suit_names[self.suit])

    def __cmp__(self, other):
        #evaluates which card is ranked higher by suit/rank
        #arbitrary definition. depends on the card game
        card1 = self.suit, self.rank
        card2 = other.suit, other.rank
        return cmp(card1, card2)


class Deck:
    """represents a deck of cards. 52 card, 4 suits, 13 cards/suit"""

    def __init__(self):
        self.cards = []
        for suit in range(4):
            for rank in range(1, 14):
                card = Card(suit, rank)
                self.cards.append(card)

    def __str__(self):
        res = []
        for card in self.cards:
            res.append(str(card))
        return '\n'.join(res)

    def pop_card(self):
        '''removes a card and returns it to another object'''
        return self.cards.pop()

    def add_cards(self, card):
        #adds a card to an object
        return self.cards.append(card)

    def shuffle(self):
        '''must import random, shuffles the deck'''
        random.shuffle(self.cards)

    def sort_deck(self):
        self.cards.sort()

    def deal(self, hand, num):
        '''moves cards from one object to another'''
        for i in range(num):
            hand.add_cards(self.pop_card())

    def deal_cards(self, num_of_hands, num):
        '''deals x amount of cards(num) to each hand'''
        for i in range(num_of_hands):
            handname = Hand('hand%d' % i)
            self.deal(handname, num)
            print '::::%s::::' % (handname.label), '\n', handname, '\n'




    class Hand(Deck):
    """child class of Deck. Represents a hand of cards"""

    def __init__(self, label=" "):
        self.cards = []
        self.label = label



From ptmcg at austin.rr.com  Fri May 16 11:37:44 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 16 May 2008 08:37:44 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>

On May 16, 6:43?am, Ant <ant... at gmail.com> wrote:
> Hi all,
>
> I have a question on PyParsing. I am trying to create a parser for a
> hierarchical todo list format, but have hit a stumbling block. I have
> parsers for the header of the list (title and description), and the body
> (recursive descent on todo items).
>

LineStart *really* wants to be parsed at the beginning of a line.
Your textline reads up to but not including the LineEnd.  Try making
these changes.

1. Change textline to:

     textline = pp.Combine(
        pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
\
        pp.LineEnd().suppress()

2. Change comb to:

    comb = head + parser

With these changes, my version of your code runs ok.

-- Paul


From stefan_ml at behnel.de  Fri May  2 10:40:25 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 02 May 2008 16:40:25 +0200
Subject: Do you know of a much simpler way of writing a program that writes
	a program?
In-Reply-To: <mailman.455.1209736660.12834.python-list@python.org>
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <481B27D9.3000107@behnel.de>

mcse jung wrote:
> Here is asample program that writes a program and then executes it.  
> Do you knowof a much simpler way of writing a program that writes a program?

I'm not quite sure what you are trying to achieve here, but I bet there is a
simpler way to do it than by generating a script. You might want to look into
functions.

http://docs.python.org/tut/node6.html#SECTION006600000000000000000

Stefan


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:14:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:14:38 +0200
Subject: C-like assignment expression?
In-Reply-To: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <48340412$0$10773$426a74cc@news.free.fr>

boblatest at googlemail.com a ?crit :
> Hello,
> 
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match

<ot>
Isn't it the third or fourth time this very same question pops up here ? 
  Starts to look like a FAQ.
</ot>

The canonical solution is to iterate over a list of expression,function 
pairs, ie:

def use_match1(match):
    # code here

def use_match2(match):
    # code here

def use_match3(match):
    # code here

for exp, func in [
     (my_re1, use_match1),
     (my_re2, use_match2),
     (my_re3, use_match3)
     ]:
     match = exp.match(line)
     if match:
        func(match)
        break


The alternate solution is Diez's Test object.

HTH


From mail at timgolden.me.uk  Fri May 16 07:09:51 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 12:09:51 +0100
Subject: Problem creating a shorcut
In-Reply-To: <c550g5-l5f.ln1@darkstargames.dnsalias.net>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <482D6B7F.20307@timgolden.me.uk>

Wolfgang Draxinger wrote:
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.

With respect, the OP is creating a Windows desktop shortcut.
Unless Microsoft suddenly decide to change their use of the 
backslash, I suggest that this is a needless generalisation.

> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. 

This is broadly true. However, it's fairly clear from the
phrase "the user's desktop" that the OP is working in some
kind of corporate environment where he can be fairly sure
where Firefox is installed by policy. In addition, it's not so
easy to find its path if it's not in the default place since apps 
very rarely add their location to the system PATH these days 
(and Firefox certainly doesn't). You could scan the registry for 
its App Paths entry in the registry but I don't know if any other 
way if it's not  the default browser (which it's clear from the 
original post it  may not be).

Sorry to sound a bit negative, but I felt that a couple of your points, 
while valid, were not altogether helpful to the situation the OP was in.

TJG



From zephyrfalcon!NO_SPAM! at gmail.com  Sat May 17 09:59:57 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Sat, 17 May 2008 09:59:57 -0400
Subject: Classmethods are evil
In-Reply-To: <g0llbe$2k6o$1@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <MwBXj.47168$3v1.19158@bignews3.bellsouth.net>

Ivan Illarionov wrote:
> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
> 
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

I agree with your sentiments, although I'm not sure I would pick metaclasses 
over class methods... or over anything at all, for that matter. :-)

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.
> 2. They are slower than metaclass methods or plain functions.

The way I see it, a class method is really just sugar for a function operating 
on the class, living in the class namespace.  As such, they are basically 
redundant, and as you point out, they can always be replaced by a function 
outside the class (and in fact, this was what people did before they came along 
in 2.2).  Personally, I don't use them... but some people like them.  Different 
strokes, and all that...

--Hans


From gagsl-py2 at yahoo.com.ar  Thu May 15 21:24:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 22:24:51 -0300
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua73jpu3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 12:13:56 -0300, Mike Driscoll <kyosohma at gmail.com>  
escribi?:

> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
>
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:

Try this different approach, using the IShellLink interface:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/pywin32/win32com.shell_and_Windows_Shell_Links.html

-- 
Gabriel Genellina



From enleverlesX.XmcX at XmclaveauX.com  Wed May  7 12:06:01 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 7 May 2008 18:06:01 +0200
Subject: Idea for P3K
Message-ID: <4821d418$0$932$ba4acef3@news.orange.fr>

Hi!

print become a function ; OK

I thought: and why the affection (=) would not become, also, a function?
Examples:
        a = 123                            return 123
        b,c = 543.21, "LOL"        return  (543.21, "LOL")



@-salutations

Michel Claveau



From greg at cosc.canterbury.ac.nz  Tue May 13 19:51:17 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 14 May 2008 11:51:17 +1200
Subject: ANN: Pyrex 0.9.7.2
Message-ID: <mailman.1113.1210751214.12834.python-announce-list@python.org>

Pyrex 0.9.7.2 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Seems I didn't quite eradicate all of the integer
indexing bugs. Here's a fix for the other half.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From ivan.illarionov at gmail.com  Sun May 25 08:14:25 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 12:14:25 +0000 (UTC)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1bl71$1id1$1@news.mtu.ru>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:

> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution is
> not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x'] funclist = [eval('lambda x:' +
>>>> func) for func in func_strings] len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False
> 
> 
> Thanks in advance
> 
> Martin

Maybe make a set of code objects?

func_code_set = set([f.func_code for f in funclist])

funclist = []
for fc in func_code_set:
    f = lambda x: x
    f.func_code = fc
    funclist.append(f)

-- Ivan


From duncan.booth at invalid.invalid  Sat May 24 13:21:40 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 May 2008 17:21:40 GMT
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <Xns9AA8BAD1431Cduncanbooth@127.0.0.1>

David <wizzardx at gmail.com> wrote:


> Problem 2: Slows down prototyping
> 
> In order to get a new system working, it's nice to be able to throw
> together a set of modules quickly, and if that doesn't work, scrap it
> and try something else. There's a rule (forget where) that your first
> system will always be a prototype, regardless of intent.

That's fine. It's alright to prototype without tests. The only rule is that 
you cannot then use any of that code in production.

> Problem 3: Slows down development in general
> 
> Having to write tests for all code takes time. Instead of eg: 10 hours
> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
> writing all the tests, and 10 on the code.
> 
You are either a very slow coder or a very poor tester: there should be a 
lot more than 1/2 hour testing for 10 hours coding. I would say the 
comparison might be 10 hours coding, 10 hours testing, then about a week 
tracking down the bugs which escaped testing and got out to the customers. 
With proper unit tests you will reduce all 3 of these numbers but 
especially the last one. Any bug which gets away from the programmer and is 
only caught further downstream costs vastly more than bugs caught during 
development, and not just for the programmer but everyone else who 
affected.

You seem to think that people are suggesting you write all the tests up 
front: what you should be doing is interleaving design+testing+coding all 
together. That makes it impossible to account for test time separately as 
the test time is tightly mixed with other coding, what you can be sure 
though is that after an initial slowdown while you get used to the process 
your overall productivity will be higher.

The first time you make a change to some code and a test which is 
apparently completely unrelated to the change you made breaks is the point 
when you realise that you have just saved yourself hours of debugging when 
that bug would have surfaced weeks later.

> Clients, deadlines, etc require actual software, not
> tests for software (that couldn't be completed on time because you
> spent too much time writing tests first ;-)).

Clients generally require *working* software. Unfortunately it is all too 
easy to ship something broken because then you can claim you completed the 
coding on time and any slippage gets lost in the next 5 years of 
maintenance.


From afilash+python at gmail.com  Wed May 21 12:55:52 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Wed, 21 May 2008 22:25:52 +0530
Subject: can someone with guessing a number
In-Reply-To: <9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
Message-ID: <9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>

    if tries > 10:
        print 'you failed- give up'
        break
<------------------- use this

On Wed, May 21, 2008 at 10:24 PM, abhilash pp
<afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
wrote:

>
>
>     if tries > 10:
>         print 'you failed- give up'
>
>
> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
>
>>  I would just like the program to exit after guessing the amount of
>> numbers wrong
>>
>> # Guess My Number
>> import random
>> the_number = random.randrange(100) + 1
>> tries = 1
>> # guessing loop
>> while (guess != the_number):
>>     if (guess > the_number):
>>         print "Lower..."
>>     else:
>>         print "Higher..."
>>
>>     guess = int(raw_input("Take a guess: "))
>>     tries += 1
>>     if tries > 10:
>>         print 'you failed- give up'
>>
>> print "You guessed it!  The number was", the_number
>> print "And it only took you", tries, "tries!\n"
>>
>> raw_input("\n\nPress the enter key to exit.")
>>
>> many Thanks
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
-------------- next part --------------
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From basti.wiesner at gmx.net  Sat May 24 18:46:41 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 00:46:41 +0200
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <g1a5ti$7gm$00$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ zxo102 <zxo102 at gmail.com> ]

>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?
> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.

[1]--> 'ED6F3C01'.decode('hex')
Out[1]: '\xedo<\x01'

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
=jxll
-----END PGP SIGNATURE-----


From frankdmartinez at gmail.com  Sat May 10 19:22:37 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Sat, 10 May 2008 16:22:37 -0700 (PDT)
Subject: Initializing a subclass with a super object?
Message-ID: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>

Class A inherits from class B.  Can anyone point me in the direction
of documentation saying how to initialize an object of A, a1, with an
object of B, b1?


From google at mrabarnett.plus.com  Tue May 27 18:15:47 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 27 May 2008 15:15:47 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de> 
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com> 
	<mailman.1660.1211910251.12834.python-list@python.org>
Message-ID: <55bb091b-c012-4a02-91b3-1d14daf91395@c65g2000hsa.googlegroups.com>

On May 27, 6:43 pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnj... at nospamgmail.com> wrote:
> > "Diez B. Roggisch" <de... at nospam.web.de> wrote in message
> >news:69g605F2v4102U2 at mid.uni-berlin.de...
> >> After being corrected about missing the construction of a None-containing
> >> list, one needs of course to think about the waste of resources, as a
> >> possible result-list is created in any case.
>
> > Yeah, I was already aware of the list of Nones, which is why I asked. Simply
> > typing the list comprehension without an assignment just *looked* wrong,
> > too.
>
> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

It could be shorter:

def compress(s):
    new = []
    return filter(None, (new.append(c) for c in s if c not in new)) or
''.join(new)

:-)


From cokofreedom at gmail.com  Wed May 28 10:32:07 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 28 May 2008 07:32:07 -0700 (PDT)
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com> 
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com> 
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com> 
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com> 
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru> 
	<g1icn8$r5$1@news.mtu.ru> <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
Message-ID: <298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>

On May 28, 1:42 pm, Michael Fesser <neti... at gmx.de> wrote:
> .oO(Ivan Illarionov)
>
> >No. Language does matter.
>
> And the weather.
>
> If you know how to program, you can write good code in any language if
> you're familiar enough with it. Many people write good code in PHP, and
> many write total crap in C/C++. It's almost never about the language,
> but about the programmer.
>
> Micha

I'd like to see someone coming from an OO programming background write
good Haskell, Pure Functional Programming code even with a high level
of OO experience. Language matters.


From duncan.booth at invalid.invalid  Sat May 24 17:15:58 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 May 2008 21:15:58 GMT
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
Message-ID: <Xns9AA8E28C4305Dduncanbooth@127.0.0.1>

David <wizzardx at gmail.com> wrote:

> So, at what point do you start writing unit tests? Do you decide:
> "Version 1 I am going to definitely throw away and not put it into
> production, but version 2 will definitely go into production, so I
> will start it with TDD?".

If you are going to prototype something without tests then you decide that 
up-front and throw the code away afterwards. It never is version 1 nor 2.

> 
> Where this doesn't work so well is if version 2 is a refactored and
> incrementally-improved version of version 1. At some point you need to
> decide "this is close to the version that will be in production, so
> let's go back and write unit tests for all the existing code".

No you've gone beyond prototyping at that point. Prototypes are for 
throwing away.

> Seriously, 10 hours of testing for code developed in 10 hours? What
> kind of environment do you write code for? This may be practical for
> large companies with hordes of full-time testing & QA staff, but not
> for small companies with just a handful of developers (and where you
> need to borrow somone from their regular job to do non-developer
> testing). In a small company, programmers do the lions share of
> testing. For programmers to spend 2 weeks on a project, and then
> another 2 weeks testing it is not very practical when they have more
> than one project.

I've done plenty of projects using conventional methods in small companies. 
If anything test time equal to development time is a vast underestimate.

> 
> As for your other points - agreed, bugs getting to the customer is not
> a good thing. But depending on various factors, it may not be the end
> of the world if they do. eg: There are many thousands of bugs in open
> source bug trackers, but people still use open source for important
> things. Sometimes it is better to have software with a few bugs, than
> no software (or very expensive, or very long time in development). See
> "Worse is Better": http://en.wikipedia.org/wiki/Worse_is_better. See
> also: Microsoft ;-)
> 

I'm not saying it is the end of the world. What it is though is expensive. 
If as the developer you spot a problem and fix it then all the time is 
yours. If it is caught in QA then it involves bug reporting, assigning 
priority, fixing and then the code has to be re-tested. If the customer 
finds the problem then customer support has to report it, someone has to 
assign it a priority, someone has to figure out how to replicate it, then 
someone has to figure out the problem, then you have to fix it, then the 
code has to be re-tested. Every level out from the initial developer you 
increase the number of people and number of steps involved.

The other reason is that if your unit test breaks after you've just written 
5 lines of code then you know which 5 lines of code are the problem. 
Probably you can see the problem instantly. At worst you just hit undo in 
your editor and try again. If a bug report comes back months later you have 
no idea where look in thousands of lines of code.

> 
> The next time your project is running late, your manager and the
> customer will be upset if you spend time updating your unit tests
> rather than finishing off the project (and handing it over to QA etc)
> and adding the unit tests when there's actually time for it.

But you aren't updating unit tests. What you are doing is coding: the tests 
are an integral part of that, or rather the tests are part of the final 
design rather than coding.

> 
>>> Clients, deadlines, etc require actual software, not
>>> tests for software (that couldn't be completed on time because you
>>> spent too much time writing tests first ;-)).
>>
>> Clients generally require *working* software. Unfortunately it is all
>> too easy to ship something broken because then you can claim you
>> completed the coding on time and any slippage gets lost in the next 5
>> years of maintenance.
> 
> That's why you have human testing & QA. Unit tests can help, but they
> are a poor substitute. If the customer is happy with the first
> version, you can improve it, fix bugs, and add more unit tests later.

No, they aren't a substitute at all. You still need human testing and QA, 
the difference is that with a good set of unit tests you reduce the number 
of times code comes back from QA before it can be passed and make it more 
likely that the customer will be happy with the first version.



From jamesd at echeque.com  Tue May 20 00:03:41 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 14:03:41 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<mailman.1371.1211245489.12834.python-list@python.org>
Message-ID: <u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>

On Mon, 19 May 2008 21:04:28 -0400, "David Stanek"
<dstanek at dstanek.com> wrote:
> What is the difference if you have a process with 10 threads or 10
> separate processes running in parallel? Apache is a good example of a
> server that may be configured to use multiple processes to handle
> requests. And from what I hear is scales just fine.
> 
> I think you are looking at the problem wrong. The fundamentals are the
> same between threads and processes.

I am not planning to write a web server framework, but to use one.
Doubtless a python framework could be written to have satisfactory
scaling properties, but what are the scaling properties of the ones
that have been written?

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From bruno.desthuilliers at gmail.com  Wed May 14 16:38:41 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:38:41 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
Message-ID: <02de1dee-8416-47a8-8195-e344cae6d31f@k37g2000hsf.googlegroups.com>

On 14 mai, 16:30, George Sakkis <george.sak... at gmail.com> wrote:
> On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > An instance method works on the instance
> > > A Static method is basically a function nested within a class object
> > > A class method is overkill?
>
> > If anything, a static method is overkill. See it this way: *if* you for some
> > reason put a method into an enclosing context - isn't it worth having a
> > reference to that?
>
> My feeling exactly; these days I almost always use class methods
> instead of static. I vaguely remember seeing somewhere an example
> where a static method was the only (elegant) solution; neither a class
> method nor a plain function would do. I'll post it if I find it unless
> someone beats me to it.

No concrete example here but I surely remember having used
staticmethods in one case where I needed class-based polymorphic
dispatch and eventually implementation inheritance (to get a default
implementation)  for something that didn't required access to the
class object.



> George



From sn at sncs.se  Tue May 27 11:48:07 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:48:07 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
Message-ID: <0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>

Good luck to you to. Its just that it .. well it has never been easy
for me to introduce Python at work. This py3k, if I like it or not, is
not making it easier.

Praktical, pragmatic, you know --- as I said, its not broken so lets
brake it

I just try to get things to work. And with some style too. Their
connected. I think a 6 cylinder engine is one of the most stylist
things there are. And when I was at a museum in Stocholm, I saw Henry
Fords original enginge and was amazed, it looks just like the one in
dads car.

Its not about changing and yes I dislike py3k, till somebody can
convince me otherwise

Guido just seems to not care to post here anyways, so we can try to
make our own branch/business


S.

On May 27, 5:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Sverker Nilsson wrote:
> > I was talking about Guido van Rossum
>
> > The one who decides, so far when people agree
>
> > But we can make a new fork
>
> Good luck with that. Weren't you the one concerned about changes in Py3K
> that forced you to change your memory profiler? Now you want to introduce a
> *third* codebase beside python2.x and python3.x? Interesting course of
> action.
>
> > He is the originator, but now it seems, for me, it is hanging out in
> > the air
>
> Why do you think so? Because you don't like Py3K?
>
> > So we need some new leadership
>
> > From somebody, somebody like you perhaps. Or me.
>
> Well - be my guest to form your own cult.
>
> Diez



From ndbecker2 at gmail.com  Thu May  1 13:57:33 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 01 May 2008 13:57:33 -0400
Subject: send gpg encrypted emails (properly mime formatted)
Message-ID: <fvd0ad$kbh$1@ger.gmane.org>

Any ideas on python packages that could help with sending gpg encrypted
(properly mime formatted) emails?

My idea is to forward all my emails to a remote imap server, but gpg encrypt
them to myself in the process.



From hdante at gmail.com  Tue May 13 14:02:51 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 11:02:51 -0700 (PDT)
Subject: [off-topic] Usenet
Message-ID: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>


Hello,

 How can I access Usenet without using Google Groups ? (my ISP doesn't
have a NNTP server). Do you recommend doing so ?

 What's your prefered news reader ?


From afrobeard at gmail.com  Wed May 28 08:47:08 2008
From: afrobeard at gmail.com (afrobeard)
Date: Wed, 28 May 2008 05:47:08 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
	<6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>
Message-ID: <6117786a-ae42-493f-8120-be16233b2980@l17g2000pri.googlegroups.com>

I copied the text off here into a new file and it worked!.

I then took a diff between the version that didnt work and the version
that worked and the only difference was a couple of spaces after this
line:-

>>> sanitize_number('0321-4683113')<There were some spaces in these angle brackets>

Apparently they caused the test case to fail on this.

Weird behavior :/

Thanks for your time Gerard and thanks to everyone else too.


On May 28, 5:11?pm, Gerard Flanagan <grflana... at gmail.com> wrote:
> On May 28, 1:48 pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following following code fails with the failiure:-
>
> > File "test.py", line 27, in __main__.sanitize_number
> > Failed example:
> > ? ? sanitize_number('0321-4683113')
> > Expected:
> > ? ? '03214683113'
> > Got:
> > ? ? '03214683113'
>
> > Expected and Got looks the same. The value should verify. ?What am I
> > doing wrong here ?
>
> > Thanks in advance. I really appreciate your time.
>
> > P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
> > Windows XP
>
> Your code works for me (Python 2.5 WinXP).
>
> Are you mixing tabs and spaces?
>
> G.



From rridge at caffeine.csclub.uwaterloo.ca  Thu May 22 05:09:18 2008
From: rridge at caffeine.csclub.uwaterloo.ca (Ross Ridge)
Date: Thu, 22 May 2008 05:09:18 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com>
Message-ID: <g13d7u$5gn$1@rumours.uwaterloo.ca>

Henrique Dante de Almeida  <hdante at gmail.com> wrote:
> Finally (and the answer is obvious). 387 breaks the standards and
>doesn't use IEEE double precision when requested to do so.

Actually, the 80387 and the '87 FPU in all other IA-32 processors
do use IEEE 745 double-precision arithmetic when requested to do so.
The problem is that GCC doesn't request that it do so.  It's a long
standing problem with GCC that will probably never be fixed.  You can
work around this problem the way the Microsoft C/C++ compiler does
by requesting that the FPU always use double-precision arithmetic.
That way your answers are only wrong when you use long double or float.

				Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge at csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  


From exarkun at divmod.com  Tue May  6 09:18:55 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 6 May 2008 09:18:55 -0400
Subject: select.poll() and WSAPoll
In-Reply-To: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
Message-ID: <20080506131855.6859.931241377.divmod.quotient.59525@ohm>

On Tue, 6 May 2008 08:36:28 -0400, inhahe <inhahe at gmail.com> wrote:
>select.poll isn't supported on Windows, because Windows doesn't have such a
>feature, or at least it didn't until Vista.  Vista implements the same thing
>but called  WSAPoll, an article is here
>http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
>I hope that the next edition of Python supports select.poll on Vista, or at
>least that someone writes a third-party module fo it. As much as I'd love to
>do it myself, it's probably beyond me.. i've never used poll before nor
>written a Python extension.  also, i don't have Vista.
>Thanks
>

If you use Twisted, then you can use I/O Completion Ports, which are even
better than WSAPoll, and your code will also work with KQueue on BSD or
EPoll on Linux without any changes. :)

Jean-Paul


From deets at nospam.web.de  Fri May 30 16:04:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 22:04:15 +0200
Subject: accumulator generators
In-Reply-To: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <6ab4u7F35bmisU1@mid.uni-berlin.de>

Cameron schrieb:
> I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
> Graham article</a> and he builds an accumuator generator function in
> the appendix. His looks like this:
> 
> <pre>
> def foo(n):
>   s = [n]
>   def bar(i):
>     s[0] += i
>     return s[0]
>   return bar
> </pre>
> 
> Why does that work, but not this:
> 
> <pre>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar
> </pre>

Because python's static analysis infers s as being a variable local to 
bar in the second case - so you can't modify it in the outer scope.

In the future, you may declare

def bar(i):
     nonlocal s
     ...


Diez


From pecora at anvil.nrl.navy.mil  Mon May 12 11:38:19 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 12 May 2008 11:38:19 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <pecora-B34BA2.11381912052008@ra.nrl.navy.mil>

In article 
<f6743b81-9324-46dd-bbd3-ef8812e28197 at d77g2000hsb.googlegroups.com>,
 wxPythoner at gmail.com wrote:

> I am stunned that this simple misunderstanding of mine ended in a
> mathematical clash of a sort. :)  You guys really blew me away wih
> your mathematical knowledge. And also the 0**0 is a thing I've never
> thought about trying, until now that is. If the mathematical rule is
> that EVERYTHING raised to the power of 0 is 1, then we should accept
> that, even in the case of 0**0. This is just the way it is.

Well, it's really not that simple.  You've seen that 0**0 can lead to 
problems in various areas of mathematics (check the Wikipedia article on 
analysis/calculus application vs. combinatorics and discrete math).  You 
have to be aware of those dangers, what the language (Python here), and 
what your application requires.  Consistency in mathematics is vital.  
If you are using 0**0=1, then your code should be consistent with that 
usage.

-- 
-- Lou Pecora


From lew at lewscanon.com  Fri May  9 01:45:04 2008
From: lew at lewscanon.com (Lew)
Date: Fri, 09 May 2008 01:45:04 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <68i6b5F2soauaU1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>

Waylen Gumbal wrote:
> Not everyone follows language-neutral groups (such as comp,programming 
> as you pointed out), so you actually reach more people by cross posting. 
> This is what I don't understand - everyone seems to assume that by cross 
> posting, one intends on start a "flamefest", when in fact most such 
> "flamefests" are started by those who cannot bring themselves to 
> skipping over the topic that they so dislike.

It's not an assumption in Xah Lee's case.  He spams newsgroups irregularly 
with rehashed essays from years ago, and a number of people are just tired of 
him.  Don't blame the victims for the perpetrator's actions, OK?

-- 
Lew


From george.sakkis at gmail.com  Fri May  2 01:50:21 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 22:50:21 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>
Message-ID: <dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>

On May 1, 11:46?pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
> Yves Dorfsman wrote:
>
> > In the following script, m1() and m2() work fine. I am assuming m2() is
> > faster although I haven't checked that (loops through the list twice
> > instead of once).
>
> Well, let's check it:
>
> $ python -m timeit -s "import x" "x.m1()"
> 100000 loops, best of 3: 6.43 usec per loop
>
> $ python -m timeit -s "import x" "x.m2()"
> 100000 loops, best of 3: 8.34 usec per loop
>
> As it turns out, m1 is faster than m2. The reason is that list
> comprehensions do the loop in C, whereas the for-append pattern does the
> loop on the Python level.
>
>
>
> > Now what I am trying to do is something like m3(). As currently written
> > it does not work, and I have tried different ways, but I haven't managed
> > to make it work.
>
> > Is there a possibility ? Or is m2() the optimum ?
>
> > [...]
> > def m1():
> > ? colours = [ e['colour'] for e in l ]
> > ? nums ? ?= [ e['num'] ? ?for e in l ]
>
> > def m2():
> > ? colours = []
> > ? nums ? ?= []
> > ? for e in l:
> > ? ? colours.append(e['colour'])
> > ? ? nums.append(e['num'])
>
> > #def m3():
> > # ?colours, nums = [ e['colour'], e['num'] for e in l ]
>
> m3 doesn't work because you're building a list of 10 color/number pairs
> that you're trying to unpack that into just two names. The working
> "derivative" of m3 is m1, which is the most natural, fastest and
> clearest solution to your problem.

Another alternative is:

from operator import itemgetter

def m3():
    colours, nums = zip(*map(itemgetter('colour','num'), l))

It's slower than m1() but faster than m2(); it's also the most
concise, especially if you extract more than two keys.

George


From duncan.booth at invalid.invalid  Mon May 12 03:20:48 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 07:20:48 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<Xns9A9BD4DD2720duncanbooth@127.0.0.1>
	<WqIVj.32521$KJ1.6884@newsfe19.lga>
Message-ID: <Xns9A9C543323E50duncanbooth@127.0.0.1>

bc90021 <python at bc90021.net> wrote:

> On Sun, 11 May 2008 19:55:31 +0000, Duncan Booth wrote:
> 
>> 7stud <bbxx789_05ss at yahoo.com> wrote:
>> 
>> 
>>> ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? tempfileName =
>>> "\"proctemp\\" ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? +
>>> self.matrix[c][0] + "_other.txt\""
>> 
>> It wouldn't exactly result in either of the error messages you
>> posted, but I expect the spurious quote marks round the filename will
>> be giving you problems.
>> 
>> Surely you want the filename to be something like
>> 'proctemp\fred_other.txt' rather than '"proctemp\fred_other.txt"'
>> with the spurious double quotes?
> 
> Yup, that's what it was.  I figured it out two seconds before this
> post.  However, it will be interesting to see how it handles files
> with spaces in the name...
> 
It will handle spaces just fine.

You need to try and understand the difference between passing arguments to 
a program, where the shell will try to parse the command line into separate 
arguments so spaces have to be escaped somehow, and calling a function 
within a program where no such parsing takes place.


From dfnsonfsduifb at gmx.de  Sat May 24 07:14:59 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:14:59 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <4837ba88_1@news.tm.net.my>
References: <esujg5x5u5.ln2@joeserver.homelan.net> <4837ba88_1@news.tm.net.my>
Message-ID: <ju9lg5xvm8.ln2@joeserver.homelan.net>

TheSaint schrieb:
> On 06:59, sabato 24 maggio 2008 Johannes Bauer wrote:
> 
>> However, this "assignment and comparison" is not working. What's the
>> "Python way" of doing this kind of thing?
> 
> If you want speak a language that isn't understood mostly you'll face
> unexpected risults.
> When you got started with C/C++, were you writing plain english to do
> programs?
> Far away to be a flame, each language have its own grammar that some time it
> will need to be learnt.
> Therefore, even myself still bad to write english, since my mind thinking
> italian sentences.

Well, I do not really see your point - of couse I'm aware (and admitted) 
that my Python skills are extremely amateurish. That's why I'm asking 
for help here...

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From bruno.desthuilliers at gmail.com  Wed May 14 16:57:35 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:57:35 -0700 (PDT)
Subject: HASH TABLES IN PYTHON
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com> 
	<mailman.1123.1210782193.12834.python-list@python.org>
Message-ID: <170579bd-bfa2-4330-90c3-7c39446943bf@k37g2000hsf.googlegroups.com>

On 14 mai, 18:23, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
wrote:
> On Wed, May 14, 2008 at 12:20 PM, Blubaugh, David A.
>
> <dbluba... at belcan.com> wrote:
> > To Whom It May Concern,
>
> > I was wondering if anyone has ever worked with hash tables within the Python
> > Programming language?

I wonder if anyone could do anything in Python *without* using hash
tables. <g>


From s0suk3 at gmail.com  Tue May 20 12:49:39 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 09:49:39 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1> 
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>
Message-ID: <a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>

On May 20, 9:04 am, castironpi <castiro... at gmail.com> wrote:
> On May 20, 5:04 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>
>
> > John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > >>>> a = 'this is longer'
> > >>>> b = 'this is longer'
> > >>>> a == b
> > > True
> > >>>> a is b
> > > False
>
> > > In the above example, Python has created only one string called
> > > 'hello' and both x and y reference it. However, 'this is longer' is
> > > two completely different objects.
>
> > That is true when run interactively, but the behaviour changes again if you
> > run it as a script:
>
> > C:\Temp>type t.py
> > a = 'this is longer'
> > b = 'this is longer'
> > print a is b
>
> > C:\Temp>t
> > True
>
> > In short, two equal strings may or may not be identical and any code which
> > makes assumptions based on observed behaviour is broken. If you want to be
> > able to test identity on strings safely then use the 'intern()' builtin to
> > get repeatable behaviour.
>
> > --
> > Duncan Boothhttp://kupuguy.blogspot.com
>
> There is no such thing as real true equals.

That's quite some dark deep philosophy. Fortunately, computers are not
as complicated as real life. I would argue that, programatically,
there *is* such thing as "real true equals". I would also argue that
that view is most certainly not shared by everyone.


From martin at v.loewis.de  Thu May  1 14:06:04 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 20:06:04 +0200
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <481a068c$0$9757$9b622d9e@news.freenet.de>

> I haven't figured out a way to do this but see no reason why it cannot be
> done.  I have a decent size application written in 100% Python.  I would
> like to distribute this application, but only the .pyc files.  Since the
> .pyc's are just the compiled sources I figured it would work, but if I copy
> just the pyc's and my main app's py into a directory by themselves, I'm
> unable to execute.  Why is this?

This should work fine. What precisely are you doing to execute it, and
how precisely does it fail?

> At this point I'm not really keen on
> handing out the source files to my application, it feels unprofessional.

I don't consider it unprofessional. If the software is packaged that
the end user readily notices the difference - that's unprofessional.
IOW, unless the user browsers your app's directory, he shouldn't even
have to know that the application is written in Python.

Regards,
Martin


From michels at mps.mpg.de  Thu May  8 03:33:31 2008
From: michels at mps.mpg.de (michels at mps.mpg.de)
Date: Thu, 8 May 2008 00:33:31 -0700 (PDT)
Subject: DISLIN 9.3 stuck
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
	<48214644$0$11610$3b214f66@aconews.univie.ac.at>
	<cda9b76c-d9e3-4f55-990d-586a5b8b6708@s50g2000hsb.googlegroups.com>
Message-ID: <4d849bee-c9d5-4f18-91a4-9120df5be3ca@a1g2000hsb.googlegroups.com>

On 8 Mai, 02:55, adolfo <aguirre.ado... at gmail.com> wrote:

> ...
> 1- The strange thing is that I went to thedislindirectory in the C:
> drive and there was no disli.pyd file anywhere. I found the file in
> the My Documents subdirectory where I had originally unzipped thedislinarchived files I downloaded and from where I run the setup.
>

The name of the Dislin module for Python 2.5 is dislin.pyd, not
disli.pyd. It's
copied by the setup program to the directory c:\dislin\python if you
have choosed
the default installation directory c:\dislin.

> > you should set environment variableDISLINtoo
> > (see python.inf, which you can find in thedislin-distribution)
>
> 2 - Well I have followed theDISLIN9.3 inf file for Python 2.5.2 for
> Windows. It contains commands for a unix command line "unzip -o
> dl_93_py.zip setup first and then... " and then:
>
> " Windows 98/ME
>
>         Add the following commands to the autoexec.bat file
>
>         PATH=c:\dislin\win;%PATH%
>         SETDISLIN=c:\dislin
>         SET PYTHONPATH=c:\dislin\python
>
>      Windows NT/2000/XP/Vista
>
>         The environment variables can be set or modified with the
>         Control Panel
>         (see -> Control Panel -> System -> Advanced -> Environment
>         Variables)."
>
>  *** I have followed all these directions butDISLINstill does not
> shop up as a module when making the Python calls.
>

The environment variable for Python is PYTHONPATH without any blanks.
You can check
the variable with the command 'echo %PYTHONPATH%' at a command prompt.


Regards,

Helmut


From eduardo.padoan at gmail.com  Wed May 14 12:23:02 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Wed, 14 May 2008 13:23:02 -0300
Subject: HASH TABLES IN PYTHON
In-Reply-To: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
Message-ID: <dea92f560805140923l24669cfft4de2d715c101c2c1@mail.gmail.com>

On Wed, May 14, 2008 at 12:20 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:
> To Whom It May Concern,
>
> I was wondering if anyone has ever worked with hash tables within the Python
> Programming language?  I will need to utilize this ability for quick
> numerical calculations.

http://docs.python.org/lib/typesmapping.html

> Thank You,
>
> David Blubaugh
-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From spamtrap at dot-app.org  Thu May  8 11:08:35 2008
From: spamtrap at dot-app.org (Sherman Pendley)
Date: Thu, 08 May 2008 11:08:35 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
Message-ID: <m17ie4ltos.fsf@dot-app.org>

kodifik at eurogaran.com writes:

>> ? ? ? ? ?| ? PLEASE DO NOT ? | ? ? ? ? ? ?:.:\:\:/:/:.:
>> ? ? ? ? ?| ?FEED THE TROLLS ?| ? ? ? ? ? :=.' - ? - '.=:
>
> I don't think Xah is trolling here (contrary to his/her habit)
> but posing an interesting matter of discussion.

It might be interesting in the abstract, but any such discussion, when
cross-posted to multiple language groups on usenet, will inevitably
devolve into a flamewar as proponents of the various languages argue
about which language better expresses the ideas being talked about.
It's like a law of usenet or something.

If Xah wanted an interesting discussion, he could have posted this to
one language-neutral group such as comp.programming. He doesn't want
that - he wants the multi-group flamefest.

sherm--

-- 
My blog: http://shermspace.blogspot.com
Cocoa programming in Perl: http://camelbones.sourceforge.net


From maxerickson at gmail.com  Sun May  4 17:20:55 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 4 May 2008 21:20:55 +0000 (UTC)
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
	<slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>
Message-ID: <Xns9A94B07C4D804maxericksongmailcom@80.91.229.13>

Nick Craig-Wood <nick at craig-wood.com> wrote:

> Joseph <cephire at gmail.com> wrote:
>>  All: I have written a program to query Amazon with ISBN and get
>>  the book details. I would like to extend so that I can read
>>  ISBN from the barcode (I will take a photo of the same using
>>  webcam or mobile). Are there any opensource/free SDK doing the
>>  same? As it is a hobby project, I don't like to spend money on
>>  the SDK. 
> 
> Pick yourself up a cue-cat barcode reader, eg from here or ebay
> 
>   http://www.librarything.com/cuecat
> 
> These appear as a keyboard and "type" the barcode in to your
> program. 
> 
> Cheap and effective.
> 

The killer application for ISBN lookup on Amazon is checking prices 
while in the bookstore. Being able to email a photo from your phone  
and then getting an email with the Amazon price in response would be 
way easier than typing the isbn into Google or whatever.


max



From castironpi at gmail.com  Thu May 15 22:22:25 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:22:25 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com> 
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com> 
	<a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>
Message-ID: <054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>

On May 15, 7:16?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:43?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
> > > <bruno.desthuilli... at gmail.com> wrote:
> > > > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > > > Why can't I write this?
> > > > > > > --
>
> > > > > > Because your antecedent is undefined?
>
> > > > > Of the two ways to play, just to say #define this per se would be a
> > > > > bad move, but that's one that comes from the wrong group. ?#define is
> > > > > a big scary macro, that python hasn't been using; it's the one-line
> > > > > typo. ?Instance:
>
> > > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > > > Use it to render planes in solids.
>
> > > > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > > > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > > > definitively.- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > Definitely. ?But, due, I forgot to complete an example.
>
> > > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > in C. ?Python:
>
> > > life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> > > exec( life1 )
>
> > > Where does it go?- Hide quoted text -
>
> > > - Show quoted text -
>
> > I'm supposed to talk about an entropy pool game. ?You can tunnel.- Hide quoted text -
>
> > - Show quoted text -
>
> If I had a send-parachute, would all you need be yield? ?Let's drop
> graphics.- Hide quoted text -
>
> - Show quoted text -

My character is studying chord progressions.  I have right angles.
I'm on a laptop, and talking in the car is fine.


From hackingkk at gmail.com  Thu May  8 08:13:44 2008
From: hackingkk at gmail.com (Krishnakant Mane)
Date: Thu, 8 May 2008 17:43:44 +0530
Subject: Newbie to python --- why should i learn !
In-Reply-To: <BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>
Message-ID: <8d3752f20805080513i12fd3384k23e9866767c33752@mail.gmail.com>

hello,
I have programmed co insidentally in all the 3 languages.
so out of my experience of 10 + years, I got my personal share of
reasons to prefer python over the other 2 namely c++ and java.
firstly as every one has already explained, python is easy, fun to
learn and can do many things much productively for programmers
compared to c++ and java.
and c# is no better in that.
besides, now a days python has become much much faster in some cases
faster than java.
compare pygtk vs java swing.
python has huge amount of libraries/ modules which are as easy to use
as the language itself.
the syntax difference mentioned in the first email on this thread
makes a huge difference when the code becomes complex and the number
of lines increase.
so there are a lot of reasons to prefer python over java.
for the question "what can I do in python easier than other languages
" is not a question to be answered because it all depends on how one
associates the problem space with the language space in which the
programmer wishes to express the solution.
there will be people who will say "java is much better choice for
large scale programmes " but people like myself will always question
that.
happy hacking.
Krishnakant.


From jcd at sdf.lonestar.org  Fri May  9 10:14:01 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 10:14:01 -0400
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <tFYUj.138$5Y1.88@trnddc04>
References: <JqEUj.52492$Bb3.45491@trnddc01>  <tFYUj.138$5Y1.88@trnddc04>
Message-ID: <1210342441.3332.19.camel@aalcdl07.lib.unc.edu>

That looks like a good approach to me.  Alternative to a dict would just
be a count of reported stocks tested against the total number of stocks,
but if one stock reports twice before another reports at all, you'll get
funny results.  Your method is probably better, in the general case.

Cheers,
Cliff


On Fri, 2008-05-09 at 13:51 +0000, Alan Isaac wrote:
> A question related to the observer pattern...
> 
> Suppose I have a variant: there are stocks, mutual funds, and investors.  Let us say that funds are observers for multiple stocks, and investors are observers for funds.  Once a "month" all stocks notify their observing funds of their end-of-month price, and *then* all fund to notify their observing investors of their end-of-month investment value. 
> 
> What is a good way to enforce this timing?  (I.e., a fund should not notify an its investors until all stocks have reported.)
> 
> Here is one way:
> 
> - for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
> - as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
> - When it is ok, the fund notifies investors and resets all the ``reportreceived`` values. 
> 
> Is this sensible enough? What are standard and better ways?
> 
> Thank you, 
> Alan Isaac 
> 
> PS I am drawing on the description of the observer pattern at
> <URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>
> The real world aspects are just to add some concreteness.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From gerard.blais at gmail.com  Mon May 12 09:50:49 2008
From: gerard.blais at gmail.com (Gerry)
Date: Mon, 12 May 2008 06:50:49 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
Message-ID: <4d3eba3d-80bc-4cb4-a2ef-abf1827f9cfd@24g2000hsh.googlegroups.com>

Many city travel surveys collect source destination trip-start data;
you might be able to find one of these studies.

I think each car in your simulation should have a destination.  Then
the simulation needs a route-finder, and cars can progress along their
routes as traffic permits -- or even change routes if traffic seems
too slow.

I think if you start with a very small city -- perhaps just a 5 by 5
grid, and generate sources and destinations at intersections randomly
along the perimeter, you'll have enough to prototype all of the
building blocks.

Gerry


On May 12, 6:37 am, Iman <iman.dar... at gmail.com> wrote:
> hi
> i'm working on some simulation project . i'm going to simulate traffic
> of a city.
> this simulation has cars , passengers , non-movable objects and
> Traffic signals  .
> i've made cars as intelligent agent . it has thinking method ,
> changing states agents ...
> the main problem is i have problem to move my agents in world .
> it would be possible to add some method to agent which move  agent in
> random  destination .
> but i'm trying to find some patterns which is designed  for this
> problems .
> is there any sample source code in python or links, docs to help me ?
>  thanks for your attention .



From johnjsal at NOSPAMgmail.com  Wed May 14 22:01:26 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:01:26 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
Message-ID: <20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>

On Wed, 14 May 2008 12:58:12 -0400
"Terry Reedy" <tjreedy at udel.edu> wrote:

> 
> "Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
> news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
> | I also recommend Gmane which provides a free news server for most mailing
> | lists: mailing lists are a lot more manageable when gatewayed into a news
> | server. If you just want to access comp.lang.python I think you'll find 
> the
> | mailing list to which it is connected is available for free on Gmane.
> 
> gmane.comp.python.general
> 
> which is where I am answering this from.  Works great. 

So that's the same as c.l.p.?


From jkugler at bigfoot.com  Fri May 30 19:44:38 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Fri, 30 May 2008 15:44:38 -0800
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com>
Message-ID: <g1q3h6$9n1$1@ger.gmane.org>

Skonieczny, Chris wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here:
> http://mail.python.org/pipermail/python-list/2007-February/427841.html
>  
> It is not true - eg. try :
> a='P'            # P is ASCII , isn't it ?
> b=int(a)
> and what you will get ? An error !!!
>  
> Or probably you yourself should - quote :
> "You probably should go through the tutorial ASAP that is located here:
> 
> http://docs.python.org/tut/ "

int() converts a strings that is a valid intenter.  What you're looking for
is ord().

In [1]: ord('d')
Out[1]: 100

In [2]: a='P'

In [3]: b=ord(a)

In [4]: b
Out[4]: 80

j



From kyosohma at gmail.com  Tue May 13 13:47:29 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 10:47:29 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <141821a0-46f7-4e78-b070-7a44ffa4b4e8@26g2000hsk.googlegroups.com>

On May 13, 12:10?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Take a look at http://python.org/

It lists various companies that use Python. There's also Sourceforge,
which you can use to list a lot of projects made with Python.
Spambayes and bittorrent are a couple of the more "famous" ones.

Mike


From deets at nospam.web.de  Wed May  7 11:25:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 17:25:03 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <68dvvdF2sv59dU1@mid.uni-berlin.de>

> Now to the main point. When a generator function is run, it immediately
> returns a generator, and it does not run any code inside the generator.
> Not until generator.next() is called is any code inside the generator
> executed, giving it traditional lazy evaluation semantics. Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?
> Giving generators special case semantics for no good reason is a really
> bad idea, so I'm very curious if there is a good reason for it being
> this way. With the current semantics it means that errors can pop up at
> unexpected times rather than the code failing fast.

The semantics of a generator are very clear: on .next(), run until the next
yield is reached and then return the yielded value. Plus of course the
dealing with StopIteration-stuff.

Your scenario would introduce a special-case for the first run, making it
necessary to keep additional state around (possibly introducing GC-issues
on the way), just for the sake of it. And violate the lazyness a generator
is all about. Think of a situation like this:

def g():
    while True:
       yield time.time()

Obviously you want to yield the time at the moment of .next() being called.
Not something stored from ages ago. If anything that setups the generator
shall be done immediatly, it's easy enough:

def g():
   first_result = time.time()
   def _g():
      yield first_result
      while True:
         yield time.time()
   return _()

Diez


From deets at nospam.web.de  Tue May  6 10:07:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 16:07:39 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <68b726F2s5g09U1@mid.uni-berlin.de>

jmDesktop wrote:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct? 

Yes.

> Is my schooling for nought on these OOP concepts if I 
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

No. There has been a discussion of interfaces and their value/reason for
existance recently:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/95e99a5dae495209/647693537ef98068?lnk=raot

Besides, at least for java (didn't do much in C#) you sure will miss on
generators, metaclasses, multiple inheritance, higher-order functions and
such if going there from python. Which I personally consider a much greater
loss and annoyance than a crutch needed in statically typed languages.

Diez


From timr at probo.com  Sun May 11 18:32:05 2008
From: timr at probo.com (Tim Roberts)
Date: Sun, 11 May 2008 22:32:05 GMT
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>

wxPythoner at gmail.com wrote:
>
>I am stunned that this simple misunderstanding of mine ended in a
>mathematical clash of a sort. :)  You guys really blew me away wih
>your mathematical knowledge. And also the 0**0 is a thing I've never
>thought about trying, until now that is. If the mathematical rule is
>that EVERYTHING raised to the power of 0 is 1, then we should accept
>that, even in the case of 0**0. This is just the way it is.

Sure, but it's ALSO the mathematical rule that 0 raised to any power is 0.
Thus, there are multiple solutions to this problem, meaning that there is
NO solution to the problem.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From sturlamolden at yahoo.no  Tue May 20 12:50:35 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 09:50:35 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <ff09a0e3-84ee-49c8-9ccd-5af46988b0fd@a70g2000hsh.googlegroups.com>

On May 19, 8:07 pm, Vicent Giner <vgi... at gmail.com> wrote:

> By the way, is it possible (and easy) to call a C function from a
> Python program??

Yes it is. You can e.g. use ctypes for that.




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 06:16:59 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 12:16:59 +0200
Subject: Classmethods are evil
In-Reply-To: <g0u518$1fec$4@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>	<mailman.1267.1211002421.12834.python-list@python.org>	<g0m9or$2qk0$1@news.mtu.ru>	<10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>
	<g0u518$1fec$4@news.mtu.ru>
Message-ID: <4832a515$0$5413$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> On Mon, 19 May 2008 13:53:31 -0700, bruno.desthuilliers at gmail.com wrote:
> 
>> On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>(snip)
>>> How did I come to this:http://code.djangoproject.com/changeset/7098
>>>
>>> I measured this and there was a marginal speed increase when
>>> classmethods wher moved to metaclass.
>> IIRC (please correct me if I'm wrong), this part of code is only called
>> when the class is created - in which case it makes sense to move it
>> where it belongs, ie to the metaclass. This is by no mean a use case for
>> classmethods.
> 
> Yes, this is not the use case for class methods, but they where used 
> there. 

Don't blame the tool for being misused.

> The whole point of my post was to say that classmethods are used 
> in a wrong way too often

I think it's the first time I see such a misuse of classmethods, and I 
have read quite a lot of (sometimes pretty hairy) Python code.

>  and most of Python programmers don't know that 
> the same thing can be implemented with metaclass methods.

I'd say that most Python programmers using metaclasses know when to use 
a metaclass method and when to use a classmethod. One case of (slight) 
misuse is certainly not enough to infer a general rule, and that doesn't 
make classmethods bad in anyway. And while we're at it, I'd consider 
using a custom metaclass only to implement the equivalent of a 
classmethod a misuse too - and in this case, kind of a WTF.

As a last point, there's at least one very big difference between a 
metaclass method and a classmethod, which is that you cannot call a 
metaclass method on an instance:

class MyMeta(type):
     def bar(cls):
         print "%s.bar()" % cls

class Foo(object):
     __metaclass__ = MyMeta

     @classmethod
     def baaz(cls):
         print "%s.baaz()" % cls

Foo.baaz()
Foo.bar()

f = Foo()
f.baaz()
f.bar()

=>

<class '__main__.Foo'>.baaz()
<class '__main__.Foo'>.bar()
<class '__main__.Foo'>.baaz()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/tmp/python-18506gCT.py", line 17, in <module>
     f.bar()
AttributeError: 'Foo' object has no attribute 'bar'

I've had use case where I needed to call classmethods on instances, 
using a metaclass method would have required an explicit call, ie 
type(obj).some_method() instead of obj.some_method(), which would have 
uselessly exposed this knowledge to client code.





From castironpi at gmail.com  Wed May 14 18:34:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 15:34:17 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
Message-ID: <8fa65ead-a840-4f73-a11b-85b1eec9fc03@m73g2000hsh.googlegroups.com>

On May 14, 3:09?pm, dj <d.a.aberna... at gmail.com> wrote:
> Hello,
>
> Rather then holding my XML document in memory before writing it to
> disk, I want to create a file object that elementtree will write each
> element to has it is created. Does any one know how to do that ?
>
> Here is my code so, far:
>
> fd = open("page.xml", "w")
> tree.write( fd, encoding="iso-8859-1")
>
> I know there's something I am doing wrong, but I just do not know
> what.

Sure.  Relational databases are more widely useful.  They're the
binary hold-on-disk for you-- a big XML file.


From wuwei23 at gmail.com  Wed May 21 22:44:33 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:44:33 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
	<c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com> 
	<6c89401d-992c-44a2-b650-f28b2d2d537f@f24g2000prh.googlegroups.com>
Message-ID: <376c8fd3-2e05-4efe-ab96-bef4f5cd6022@s21g2000prm.googlegroups.com>

On May 22, 2:28 am, Xah <xah... at gmail.com> wrote:
> ?No, what was generally rejected was the idea that *you* could bring
> more clarity to the documentation, based on the complete absence of it
> in your posts & "essays". Basically, noone wanted docs that would
> randomly degenerate into ad hominem accusations of elitism aimed at
> the module authors.?
>
> Dear Alex moron number 23,

Thank you for illustrating my point perfectly.


From castironpi at gmail.com  Thu May 15 10:40:17 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:40:17 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
Message-ID: <60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>

On May 15, 9:26?am, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > Why can't I write this?
> > --
>
> Because your antecedent is undefined?

Of the two ways to play, just to say #define this per se would be a
bad move, but that's one that comes from the wrong group.  #define is
a big scary macro, that python hasn't been using; it's the one-line
typo.  Instance:

#define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )

Use it to render planes in solids.

Back about 'this', I honestly hadn't remembered 'til this time, when I
got a chance to reread the subject.  Plus I keep ditching my radio.

--


From jbarciela at gmail.com  Mon May  5 14:04:08 2008
From: jbarciela at gmail.com (jbarciela at gmail.com)
Date: Mon, 5 May 2008 11:04:08 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
Message-ID: <070fc7e3-3e51-40b2-a6f2-026d00f8fa2f@m73g2000hsh.googlegroups.com>

John, you are the man

> during my search for perfection, I found Qooxdoo (http://qooxdoo.org/).
>
> ...
>
> I found QxTransformer (http://sites.google.com/a/qxtransformer.org/qxtransformer/Home) which is a
> XSLT toolkit that creats XML code that invoke qooxdoo.

Qooxdoo is indeed really impressive. But I read that YAHOO will serve
the javascript files for you from their CDN when you use YUI, for
free, and that's no peanuts, so I wonder, did you find anything at all
like that that could be used with YUI?

I have evaluated XForms, Laszlo, Flex, ZK, ... but I have to say
QxTransformer is the cleverest solution I have found so far (thanks to
you). I love it.


> I want Pythoncard.

I feel with you

Thanks!
Jaime


From mrmakent at cox.net  Fri May  2 10:44:44 2008
From: mrmakent at cox.net (Mike Kent)
Date: Fri, 2 May 2008 07:44:44 -0700 (PDT)
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <fc9a94de-4cca-46d2-a502-92b11bdf6c9e@m36g2000hse.googlegroups.com>

On May 2, 9:47 am, Jetus <stevegi... at gmail.com> wrote:

> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

Marc has already given you the correct answer.  You really should read
up on the csv module.


From alex.m.gusarov at gmail.com  Mon May 26 05:55:52 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 16:55:52 +0700
Subject: finding icons for Apps
In-Reply-To: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
References: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
Message-ID: <ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>

On Sun, May 25, 2008 at 3:41 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:

>   http://tango.freedesktop.org/
>
> ...as used by OpenOffice, Gimp, Pidgin (Gaim), etc.
>
> However, if you only need a few basics (Save, Print, etc.) just use
> the 'standard' for the platform. Whatever you do, don't mix different styles
> of icon.
>
> Note that for Windows the application icon (the thing you see on the
> Desktop or in a folder) is done as an .ico file, which has multiple sizes in
> the same file. You'll need to create this in an editor such as Visual
> Studio.
>

With PyQt4 I can use even .SVG icons on all platforms ;) (and tango includes
svg version for all icons)
And please, Visual Studio as an icon editor..

Best regards,
Alex Gusarov
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From rocco.rossi at gmail.com  Fri May 16 11:32:48 2008
From: rocco.rossi at gmail.com (rocco.rossi at gmail.com)
Date: Fri, 16 May 2008 08:32:48 -0700 (PDT)
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
	<_PgXj.4838$Kk3.4214@bignews9.bellsouth.net>
Message-ID: <9741f6ab-7a0f-4921-857f-24bd6753434a@t54g2000hsg.googlegroups.com>

On May 16, 4:27 pm, "inhahe" <inh... at gmail.com> wrote:
> >>> a = 1
> >>> b = eval("a")
> >>> b
> 1
> >>> a =1
> >>> b = globals()["a"]
> >>> b
> 1
> >>> a =1
> >>> b = locals()["a"]
> >>> b
>
> 1<rocco.ro... at gmail.com> wrote in message
>
> news:aec6cdd8-3bde-4d68-ad93-d9ece9567886 at b1g2000hsg.googlegroups.com...
>
> > Is there any function which will return a variable by passing to it
> > the string containing the variable's name? Something like this for
> > instance:
>
> > foo = some_function("foo")
>
> > or perhaps it's a dictionary. I don't know, but I would really like to
> > find out how it can be done. I guess it is achievable.
>
> > Thank you.

Perfect. Thank you all for your replies.


From johnjsal at NOSPAMgmail.com  Tue May 20 09:13:38 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 09:13:38 -0400
Subject: Misuse of list comprehensions?
Message-ID: <038e4418$0$27258$c3e8da3@news.astraweb.com>

I posted this code last night in response to another thread, and after I 
posted it I got to wondering if I had misused the list comprehension. Here's 
the two examples:

Example 1:
--------------------
def compress(s):
    new = []

    for c in s:
        if c not in new:
            new.append(c)
    return ''.join(new)
----------------------

Example 2:
------------------------
def compress(s):
    new = []
    [new.append(c) for c in s if c not in new]
    return ''.join(new)
--------------------------

In example 1, the intention to make an in-place change is explicit, and it's 
being used as everyone expects it to be used. In example 2, however, I began 
to think this might be an abuse of list comprehensions, because I'm not 
assigning the result to anything (nor am I even using the result in any 
way).

What does everyone think about this? Should list comprehensions be used this 
way, or should they only be used to actually create a new list that will 
then be assigned to a variable/returned/etc.? 




From daveparker at flamingthunder.com  Wed May 28 17:13:06 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:13:06 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
Message-ID: <dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>

On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> Following your posts in this thread, I see that
> you 'plan to add soon' every cool feature that every other language seems to
> have.

I've already added a lot of them.  For example, loops that don't need
looping variables:

For 1000 times do ...

Explicit infinite loops:

For forever do ...

I don't those are features that every other language seems to have,
not even Python.

Plus, by this weekend, built-in compiled fullscreen 3D graphics will
be in, too.

> With no certainty whatsoever that today's program will work on
> tomorrow's FT.

Kind of like how this year's program won't work on next year's
Python?  Except Flaming Thunder is faster. ;)


From mabbikeel at gmail.com  Sun May 18 17:31:20 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 22:31:20 +0100
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<g0q05b$f3r$03$1@news.t-online.com>
Message-ID: <op.ubdcqiai4fd8pl@mp1206-hp.config>

On Sun, 18 May 2008 20:30:57 +0100, Peter Otten <__peter__ at web.de> wrote:

> Matt Porter wrote:
>
>> I'm trying to compress a string.
>> E.g:
>>   "AAAABBBC" -> "ABC"
>
> Two more:
>
>>>> from itertools import groupby
>>>> "".join(k for k, g in groupby("aaaaaabbbbbbbbbbcccccc"))
> 'abc'
>
>>>> import re
>>>> re.compile(r"(.)\1*").sub(r"\1", "aaaaaaabbbbcccccccc")
> 'abc'
>

Brilliant - I was trying to figure out how to do this with the re  
capabilities.

Thanks to everyone

> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
--



From vginer at gmail.com  Sat May 17 18:32:29 2008
From: vginer at gmail.com (Vicent Giner)
Date: Sat, 17 May 2008 15:32:29 -0700 (PDT)
Subject: Using Python for programming algorithms
Message-ID: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>

Hello.

I am new to Python. It seems a very interesting language to me. Its
simplicity is very attractive.

However, it is usually said that Python is not a compiled but
interpreted programming language ?I mean, it is not like C, in that
sense.

I am working on my PhD Thesis, which is about Operations Research,
heuristic algorithms, etc., and I am considering the possibility of
programming all my algorithms in Python.

The usual alternative is C, but I like Python more.

The main drawbacks I see to using Python are these:

* As far as I understand, the fact that Python is not a compiled
language makes it slower than C, when performing huge amounts of
computations within an algorithm or program.

* I don't know how likely it is to find libraries in Python related to
my research field.

* I know Python is a "serious" and mature programming language, of
course. But I do not know if it is seen as "just funny" in a research
context. Is Python considered as a good programming language for
implementing Operations Research algorithms, such as heuristics and
other soft-computing algorithms?

Maybe this is not the right forum, but maybe you can give me some
hints or tips...

Thank you in advance.


From wizzardx at gmail.com  Sun May  4 06:11:32 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 12:11:32 +0200
Subject: Open a file within an ISO in python.
In-Reply-To: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>
References: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040311w5828261egd90f0afae524c510@mail.gmail.com>

On Sun, May 4, 2008 at 12:01 PM,  <danikar at gmail.com> wrote:
> Is there a way to open a file that is inside of an ISO in python?
>
>  Say I have an ISO file, danikars.iso and on the iso there is a file
>  called information.txt
>
>  I want to be able to do something like this.
>
>  [code]
>  iso_h = openiso("danikars.iso")
>  file_h = iso_h.extract("information.txt")
>  contents = file_h.read()
>  [/code]
>
>  Is there anything that will give me that functionality? Or close?
>

Under Linux you can mount iso files as loopback devices.

eg:

mkdir mnt
sudo mount -o loop file.iso ./mnt

Then the ./mnt directory will 'contain' the contents of the iso


From skanemupp at yahoo.se  Thu May 15 12:29:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:29:36 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <2ba65e61-8b96-4516-b828-909c22adef66@m36g2000hse.googlegroups.com>

On 15 Maj, 18:12, globalrev <skanem... at yahoo.se> wrote:
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> d.readline()
>
> returns true in the shell but prints no text even though the document
> contains text.
>
> d.name returns nothing, d.name() raises an error.

wow im an idiot. print...


From inhahe at gmail.com  Fri May 23 06:12:25 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 06:12:25 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <MKwZj.2749$772.668@bignews2.bellsouth.net>


"Nick Craig-Wood" <nick at craig-wood.com> wrote in message 
news:slrng3d2g4.3re.nick at irishsea.home.craig-wood.com...
> bukzor <workitharder at gmail.com> wrote:
>>  That does, in fact work. Thanks! I'm a little sad that there's no
>>  builtin way to do it, owell.
>>
>> >>> def f(a, *args):
>>  ...     print a
>>  ...     for b in args: print b
>>  ...
>> >>> import inspect
>> >>> a = [2,3]
>> >>> b = {'a':1}
>> >>> inspect.getargspec(f)
>>  (['a'], 'args', None, None)
>> >>> map(b.get, inspect.getargspec(f)[0])
>>  [1]
>> >>> map(b.get, inspect.getargspec(f)[0]) + a
>>  [1, 2, 3]
>> >>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
>>  1
>>  2
>>  3
>
> If I saw that in my code I'd be wanting to get rid of it as soon as
> possible!
>
> I'd re-write f() to have all named arguments then the problem becomes
> easy and the answer pythonic (simple dictionary manipulation)...
>
> So instead of f(a, *args) have f(a, list_of_args).
>
> The f(*args) syntax is tempting to use for a function which takes a
> variable number of arguments, but I usually find myself re-writing it
> to take a list because of exactly these sort of problems.  In fact I'd
> be as bold to say that f(*args) is slightly un-pythonic and you should
> avoid as a user interface.  It does have its uses when writing
> polymorphic code though.
>


(I second that) the function should definitely be changed if possible.  it's 
hard to say what the real constraints of the problem are, so I just answered 
his question as if that's what he actually needed (assuming the length of 
the list and number of named arguments would be variable).

if we assume the constraints are that:
1.he has list, l
2.he has a dictionary, d
3.he wants the function to print the values in the dictionary according to a 
specific order of their keys as defined by the function, followed by the 
values of the list
then:

def f(d, l):
  order_of_keys = ['a']
  for key in order_of_keys:
    print d[key]
  for element in l:
    print element

#not tested





From ivo.talvet at gmail.com  Sun May 11 19:39:33 2008
From: ivo.talvet at gmail.com (ivo talvet)
Date: Mon, 12 May 2008 01:39:33 +0200
Subject: python without while and other "explosive" statements
Message-ID: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>

Hello,

Is it possible to have a python which not handle the execution of
"while", "for", and other loop statements ? I would like to allow
remote execution of python on a public irc channel, so i'm looking for
techniques which would do so people won't be able to crash my computer
(while 1: os.fork(1)), or at least won't won't freeze my python in a
infinite loop, make it unresponsive. Is there a compiling option (or
better, something i can get with apt-get cos i think compiling myself
and handle all the metastuff myself is somehow dirty) for have a
"secure python" (you can guess what i mean by "secure" in my case) or
must i touch myself the source disable some code lines ? If last
solution, which modifications in which files should i do ? (sorry for
my bad english)

Thanks.

Ivo


From sturlamolden at yahoo.no  Wed May 21 13:56:10 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:56:10 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <a569e394-2409-487d-88b2-a8fb3c904cb1@p25g2000hsf.googlegroups.com>

On May 21, 11:38 am, boblat... at googlemail.com wrote:

> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python.


Assignment expressions is disallowed in Python to protect against a
very common bug in C/C++ programs, the (accidental) confusion of

   if (match = my_re1.match(line))

with

   if (match == my_re1.match(line))

or vice versa.










From tjreedy at udel.edu  Wed May  7 15:15:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 7 May 2008 15:15:55 -0400
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <fvsv59$8c1$1@ger.gmane.org>


<swapsun at gmail.com> wrote in message 
news:d61b9c56-6f9a-4b29-9247-4fce0b80ecbe at f63g2000hsf.googlegroups.com...
| Any idea why the following program does not work? I was learning IO on
| Python and the following generates a TypeError: range() integer end
| argument expected, got str.
| I am a beginner.
|
| ################################
| # print input name (str k), j times using raw_input
|
| def hello():
|    j=raw_input("Please type in the number of times you want to print
| ")
|    k=raw_input("Please type in your name ")
|    printname(j,k)
|
| def printname(j,k):
|          for i in range(j):
|                print ("Hello %s" % k)

For future debugging, use print to find out what values you actually have.
print j,k #before printname()
would have shown you that j is a string.
Also use the type() function as needed.
And do read the Lib Ref sections on builting functions and types.

tjr







From malaclypse2 at gmail.com  Mon May 12 12:27:32 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Mon, 12 May 2008 12:27:32 -0400
Subject: passing *args "recursively"
In-Reply-To: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <16651e80805120927u767479b5o83b6b69ae4430e13@mail.gmail.com>

On Mon, May 12, 2008 at 12:19 PM, Guillermo
<guillermo.listas at googlemail.com> wrote:
>  def func1(*args):
>     print args # (1, 2, 3)
>     func2(args)

change this line to:
    func2(*args)

-- 
Jerry


From mal at egenix.com  Wed May  7 05:24:48 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Wed, 07 May 2008 11:24:48 +0200
Subject: mxTexTools (Re: using sqlite3 - execute vs. executemany; committing
	...)
In-Reply-To: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
Message-ID: <48217560.9070707@egenix.com>

On 2008-05-07 00:07, Vlastimil Brom wrote:
> Thanks for reminding me about
> the mxTextTools; I looked at this package very quickly several months
> ago and it seemed quite
> complex and heavy-weight, but maybe I will reconsider this after some
> investigation ...

mxTextTools gives you almost full C speed while still being programmable
in Python and without a compiler.

It is a low level parsing engine. Here's talk I gave on mxTextTools
last year:

http://www.egenix.com/library/presentations/EuroPython2007-Parsing-Languages-with-mxTextTools/

If you're looking for ways to hide the complexity, you could try
SimpleParse (which uses mxTextTools for the parsing, but provides a
grammar based front-end).

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 07 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From cokofreedom at gmail.com  Tue May  6 04:38:29 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 01:38:29 -0700 (PDT)
Subject: Newbie question - probably FAQ (but not exactly answered by 
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org> 
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr> 
	<mailman.635.1210062200.12834.python-list@python.org>
Message-ID: <3fc840fa-cc5d-490c-b764-4b3c3e807880@56g2000hsm.googlegroups.com>

2.5 seems the defacto standard now for a new user, NB: probably not
the standard for the common business productions. However are you on
Windows or *nix? *nix may ship a certain version, so for ease of use
it would be best to use that.

Personally I use 2.5 because it is a complete version, and the latest
fully released giving me a lot of features to play with. But as
previously put if you are starting out, you are very unlikely to need
a huge amount of those features for a while.

So my opinion is used 2.5, it is released with no huge new feature
updates to come and won't break on random errors. (Unless you find a
real new one!). Also new is cool...


From tjreedy at udel.edu  Fri May  9 15:54:47 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:54:47 -0400
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org><26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
	<48241B01.8050009@cheimes.de>
Message-ID: <g02a64$k23$1@ger.gmane.org>


"Christian Heimes" <lists at cheimes.de> wrote in message 
news:48241B01.8050009 at cheimes.de...
| Kay Schluehr schrieb:
| > http://www.python.org/ftp/python/3.0/python-3.0a5.msi
|
| > Error 404: File Not Found
|
| > http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi
|
| > Error 404: File Not Found
|
| The Windows binaries usually take a while. I'm adding Martin to the CC
| list. His is most like building the files today.

I am downloading the first version now. 





From shiningsandy at gmail.com  Mon May 19 03:32:41 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 00:32:41 -0700 (PDT)
Subject: python script to windows exe
Message-ID: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>

hi all

i am very much a newbie to python but has some experience of
development.i am trying to write a script which will loop through the
outlook 2003 inbox and save the email data in an simple data.html page
and save all the attachments in a folder name emails.after some
initial struggling i am able to write this script.but now i want to
create the exe file of this script.i have used py2exe for this job and
created the exe. but when i run the exe my program in not behaving as
it supposed to be.its generating some errors.i dont know why this
thing is happening as when i run my script it works fine.can some one
put some light here. i am using python2.5 and is using
py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
service pack2.


thanks and reagrds
sandeep kumar sharma


From patrickstinson.lists at gmail.com  Thu May 22 14:13:46 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Thu, 22 May 2008 10:13:46 -0800
Subject: statically linking release build on mac
Message-ID: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>

I get an error reporting an unfound symbol using a statically linked release
build of python2.5 on a OSX-Tiger. This works fine on leopard, where the
system default python is version 2.5.1 - the same version that I'm using to
link to.

Sorry, I'm currently screwing with my configs and don't have a build to run
(my bad :) anymore, but the error is basically this:

Undefined symbol: _PY_DebugFlag
Referenced From: <my exe>
Expected in: <core audio framework lib image location>

I moved the system python frameworks out of the frameworks path for the
build and run just to make sure that they weren't somehow getting in the
way. I found that that symbol is defined in pydebug.h for both release and
debug builds. Also, I discovered that I can fix the problem with some of my
targets (I have both standalone exe and plugin lib versions of my app code)
by referencing the variable directly like this: int mine = Py_DebugFlag,
which fixes that symbol but then the next symbol in pydebug (PY_VerboseFlag)
is reported as undefined. After some playing with it, I found that the
following code will fix the problem in a basic standalone app:

    int _________mine;
    void *__________p = NULL;
    _________mine = Py_DebugFlag;
    _________mine = Py_VerboseFlag;
    _________mine = Py_InteractiveFlag;
    _________mine = Py_OptimizeFlag;
    _________mine = Py_NoSiteFlag;
    _________mine = Py_UseClassExceptionsFlag;
    _________mine = Py_FrozenFlag;
    _________mine = Py_TabcheckFlag;
    _________mine = Py_UnicodeFlag;
    _________mine = Py_IgnoreEnvironmentFlag;
    _________mine = Py_DivisionWarningFlag;
    _________mine = _Py_QnewFlag;
    __________p = (void *) _PyOS_ReadlineTState;
    __________p = (void *) PyOS_ReadlineFunctionPointer;


Woah, don't I feel like the lib is jerking me around a little? Anyway, this
works if I put it in main() for a standalone target, in a semi-random class
constructor for the AudioUnit target, and I still can't find the right place
to put it for the RTAS (
http://www.digidesign.com/index.cfm?query=developers%20plugin_info%20rtas.cfm&langid=1)
target. It's a little weird that I'm getting this at runtime and not at
link-time since I'm linking statically.

This is the standalone main() that works, but fails if I remove the above
code:

#include <Python.h>

int main(int, char **)
{
  int mine = -1;
  void *p = NULL;

  mine = Py_DebugFlag;
  mine = Py_VerboseFlag;
  mine = Py_InteractiveFlag;
  mine = Py_OptimizeFlag;
  mine = Py_NoSiteFlag;
  mine = Py_UseClassExceptionsFlag;
  mine = Py_FrozenFlag;
  mine = Py_TabcheckFlag;
  mine = Py_UnicodeFlag;
  mine = Py_IgnoreEnvironmentFlag;
  mine = Py_DivisionWarningFlag;
  mine = _Py_QnewFlag;
  p = (void *) _PyOS_ReadlineTState;
  p = (void *) PyOS_ReadlineFunctionPointer;

  Py_Initialize();

  Py_Finalize();
}


It seems to me like this might have something to do with setting up a symbol
lookup table correctly or something, I don't know. I'm not having any
problems with debug builds. This is the relevant part of my config.status.

ac_cs_version="\

python config.status
2.5

configured by ./configure, generated by GNU Autoconf
2.59,

  with options \"'--enable-universalsdk' '--disable-shared'\"


Help? *whimper*.. Cheers.
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From maxwell.newlands at gmail.com  Thu May 15 18:35:01 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 15:35:01 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
Message-ID: <f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>

On May 15, 6:18?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > you're right, my java implementation does indeed parse for Id3v2
> > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > i buffer and parse. ?apologies if i misrepresented my code!
>
> > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > Mutagen/Tutorial) leads me to believe that something like this might
> > work:
>
> > from mutagen.mp3 import MP3
> > id3tags = MP3(urllib2.urlopen(URL))
>
> > but this gives me the following TypeError: "coercing to Unicode: need
> > string or buffer, instance found". ?does this mean i need to convert
> > the "file-like object" that is returned by urlopen() into a unicode
> > object? ?if so, do i just decode() with 'utf-8', or is this more
> > complex? ?as of now, doing so gives me mostly "No such file or
> > directory" errors, with a few HTTP 404s.
>
> [snip]
> I think it's expecting the path of the MP3 but you're giving it the
> contents.

cool, so how do i give it the path, if not in the form of a URL
string?  maybe this is obvious...


From Lie.1296 at gmail.com  Sun May 25 13:49:54 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:49:54 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
Message-ID: <9194b663-422f-4b47-aa3b-402689ec708c@y22g2000prd.googlegroups.com>

On May 23, 5:14?am, "inhahe" <inh... at gmail.com> wrote:
> I don't like php. ?I tried it once and I had it sort a list, but the list
> was apparently too long for its sorting function because it just sorted the
> first so-many elements of it and left the rest in order, and didn't generate
> any error. ?I like a language that's actually determined by what you tell it
> to do. ? I hear it has a lot of security issues too. ?I'm not sure that php
> *runs* faster than python, having seen benchmarks, but it certainly loads
> faster. ?Maybe not so much of a difference once python25.dll is already in
> the cache though (speaking from a windows perspective). ?because when i load
> a program it can take a while but it's pretty quick if i'd just loaded one
> recently. ?but you don't necessarily have to load python for each page
> rendering anyway.
>
> I like the Python language a lot better than php. ?but I just really like
> Python.
>
> php mixes html and code out-of-the-box (sort of.. i guess it's more like a
> reversal of which one is explicit)... if you use Python you should look into
> a 'templating engine' like mako. ?i use cheetah, but mako is supposed to be
> better.
>
> i think Python is the easiest language to learn, with the possible exception
> of qbasic (just because making multidimensional arrays in python isnt that
> obvious, although maybe it is using numpy, i've never tried it). ?Python
> isn't as easy as basic if you use/have to read the more advanced features,
> but those aren't even available in basic. so I find it a comfortable
> learning curve.

You should see Basic's file operation syntax, ugly and hackish. All
those #1, #2, etc is ugly and unintuitive. That's why I've always
avoided anything related to file in Basic (no hard feelings to Basic
programmers, my first language is Basic and I'm pretty good at it
except for anything related with files). In python, file read is as
simple as open('path', 'mode'), and the for-loop can easily loop the
file object.


From kyrie at uh.cu  Thu May 29 17:35:55 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 29 May 2008 17:35:55 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>
References: 4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com
	<bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>
Message-ID: <1212096955.483f21bb25a6b@comuh.uh.cu>

> On May 28, 11:46 pm, Dave Parker <davepar... at flamingthunder.com>
> wrote:
> > On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >
> > > > Kind of like how this year's program won't work on next year's
> > > > Python?
> >
> > "Like Perl 6, Python 3.0 will break backward compatibility. There is
> > no requirement that Python 2.x code will run unmodified on Python 3.0.

See? 2.x -> 3.x. Major version. Not "next week's python", not "next year's
python", but "the next mayor version of python". With a clean, well documented,
upgrade path.

Unlike "next month's Flaming Thunder". (Unless you are producing a new major
version every week, in which case I shut up, and may think about buying several
versions only so you must keep maintaining all of them)

-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie



From dteslenko at gmail.com  Wed May 14 03:13:48 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Wed, 14 May 2008 11:13:48 +0400
Subject: file locked for writing
In-Reply-To: <91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
	<op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
	<91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>
Message-ID: <91325fec0805140013x272094f5md19ffad3350a31fe@mail.gmail.com>

On Wed, May 14, 2008 at 11:04 AM, Dmitry Teslenko <dteslenko at gmail.com> wrote:
>  When I've rewrite code something like that:
>        with open(backup_file_name, 'w') as backup_file:
>                .....
>
>                filter.parse('<updated file name>')
>                del input, output, filter
>         os.remove(project.get_vcproj())
>         os.rename(backup_file_name, project.get_vcproj())
>
>  It triggers WindowsError on os.remove()

Using "programming by permutation" pattern I've finally solved that
thing: filter
for some reason doesn't close file after XMLFilterBase.parse(<file_name>);
even after del filter; Workaround for this is to pass <file_descriptor>
instead of <file_name> to XMLFilterBase.parse() and then explicitly close
file or put this call in with-block.


From python-url at phaseit.net  Mon May 12 12:30:18 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 12 May 2008 16:30:18 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 12)
Message-ID: <g09raq$vq8$1@lairds.us>

QOTW:  "With Python, you can program with a smile on your face." - Gary
Herron
"Looking back over the years, after I learned Python I realized that I
never really had enjoyed programming before." - Aahz
    http://groups.google.com/group/comp.lang.python/browse_thread/thread/b4aa1d1578c26950/
    
    
    Python 2.6a3 and 3.0a5 released
        http://mail.python.org/pipermail/python-list/2008-May/490243.html
    
    Choosing a license for an open source project, and how it impacts 
    users, contributors *and* developers:
        http://mail.python.org/pipermail/python-list/2008-May/489663.html
        http://mail.python.org/pipermail/python-list/2008-May/489840.html
    
    Are we missing something due to Python not having interfaces?
        http://mail.python.org/pipermail/python-list/2008-May/489799.html
    
    Anonymous for-loops (a "repeat N times" loop) and anonymous asignments:
        http://mail.python.org/pipermail/python-list/2008-May/490591.html
        http://mail.python.org/pipermail/python-list/2008-May/490723.html
    
    Why should a programmer learn Python as a new language?
        http://mail.python.org/pipermail/python-list/2008-May/490110.html
    
    Two questions about the Observer pattern:
        http://mail.python.org/pipermail/python-list/2008-May/490387.html
        http://mail.python.org/pipermail/python-list/2008-May/490168.html
    
    How to use overridable methods when defining a property:
        http://mail.python.org/pipermail/python-list/2008-May/490451.html
    
    Tim Golden explains how to recursively walk the Windows registry:
        http://mail.python.org/pipermail/python-list/2008-May/489741.html
    
    Find anagrams in a list of words:
        http://mail.python.org/pipermail/python-list/2008-May/490061.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From rpm9deleteme at earthlink.net  Thu May 22 23:54:07 2008
From: rpm9deleteme at earthlink.net (RPM1)
Date: Thu, 22 May 2008 23:54:07 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <g15f54$lcd$1@aioe.org>

John Salerno wrote:
> 
> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

Chess already has at least two solutions that are in widespread use:

Winboard
UCI (Universal Chess Interface)

Basically you write your chess "engine" to speak either Winboard or UCI 
and then you can "run" it in one of the various GUI interfaces, (such as 
Shredder, Fritz, Arena, ...).

See:
http://www.playwitharena.com/

or the comparatively young:
http://pychess.googlepages.com/        (which is written in Python)


Patrick


From siddhantgoel at gmail.com  Tue May  6 03:23:32 2008
From: siddhantgoel at gmail.com (Siddhant)
Date: Tue, 6 May 2008 00:23:32 -0700 (PDT)
Subject: Confusion regarding the readline module
Message-ID: <8c46be09-35bf-429f-b3c7-5c68abbd548b@f24g2000prh.googlegroups.com>

Hi!
I am having some doubts related to the readline module. I hope someone
could clear them.
1. What exactly does the readline.get_line_buffer() function do? Does
it return whatever is the current input by the user? If yes, then can
I use it to check the current inputs of the user and base the next-
word completion against whatever the user has entered so far? There
wasn't much documentation on it, and a lot of googling couldn't help
much. :(
2. Related to the completer function, what is meant by returning the
"state"th completion for "text"? Is the completer function called
everytime (for all possible values of "state") when I press the Tab
key? When/How is it called?

Basically, I need to define a completer function, that should take
into consideration whatever the user has entered so far, and complete
the next word accordingly. The same way as a "cd /some/file" is
meaningless.


From benjamin.kaplan at case.edu  Tue May 20 12:40:37 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 20 May 2008 12:40:37 -0400
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
Message-ID: <ec96e1390805200940l42ee2c5duc83b315ab1990d68@mail.gmail.com>

On Tue, May 20, 2008 at 12:26 PM, Skye <spoier at gmail.com> wrote:

> How do I access the sysctl(3) call from Python on BSD?
>
> Specifically I want to retrieve:
>
> $ sysctl -d net.inet.ip.stats
> net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)
>
> So I'll need some way of getting to struct ipstat from Python as well
>
> Thanks,
> Skye
>

You could use subprocess.Popen to run the command yourself and just parse
the output.

http://docs.python.org/lib/node528.html

>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From rhamph at gmail.com  Sat May 31 13:13:39 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sat, 31 May 2008 10:13:39 -0700 (PDT)
Subject: ThreadPoolingMixIn
References: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>
Message-ID: <1c4d113e-b375-471d-9d54-1401c8844352@t12g2000prg.googlegroups.com>

On May 30, 2:40 pm, pavel.uva... at gmail.com wrote:
> Hi, everybody!
>
> I wrote a useful class ThreadPoolingMixIn which can be used to create
> fast thread-based servers. This mix-in works much faster than
> ThreadingMixIn because it doesn't create a new thread on each request.

Do you have any benchmarks demonstrating the performance difference/


>             t.setDaemon(True)

Unfortunately, shutdown with daemon threads is fairly buggy. :/


From istvan.albert at gmail.com  Tue May 20 18:20:18 2008
From: istvan.albert at gmail.com (Istvan Albert)
Date: Tue, 20 May 2008 15:20:18 -0700 (PDT)
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
Message-ID: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>

On May 20, 6:13 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Salvatore DI DI0 schrieb:
>
> > Hello,
>
> > The Processing Graphics language has been implemented in Javascript.
>
> No, it hasn't. Processing is written in Java.

He meant it has been re-implemented in Javascript:

http://ejohn.org/blog/processingjs/

The closest python based equivalent of Processing is NodeBox but it is
a OS X product:

http://nodebox.net/code/index.php/Home

There is a jython based NodeBox that runs on windows that can be found
here:

http://research.nodebox.net/index.php/NodeBoxDev

i.




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 03:47:41 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 09:47:41 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
Message-ID: <483bbc97$0$5505$426a74cc@news.free.fr>

erik.oosterwaal at gmail.com a ?crit :
>> There are a couple points I don't get here. Mostly: how is your
>> application logic separated from the presentation logic if you "intermix
>> code directly into the HTML" ? Or are you pages including the libs,
>> getting the appropriate data out of the DB, and then including another
>> file acting as a template ? If so, then how are you're "pages" different
>> from MVC frameworks controllers ?
> 
> I have the WSC files as "libraries" I can open in a standard ASP page,
> So for example, to get a recordset in one of my ASP pages, I would use
> something like
> 
> 	Dim objUsers, Recordset_of_users
> 	Set objUsers= GetObject("script:" & Server.MapPath("/~components/
> users.wsc"))
> 		objUsers.open()
> 		Set Recordset_of_users =
> objUsers.getUsersByGroup(request.queryString("group_id"))
> 		objUsers.close()
> 	Set objUsers= Nothing
> 
> I put code like this at the top of my ASP pages, and inside the HTML
> code I can use "Recordset_of_users" and loop through it (for example).
> All code in the asp pages is getting and setting information, or
> looping through it. All real (business) logic is inside the WSC files.

> The only real difference is that I don't use the "C" of MVC.

Yes you do. It's exactly what your code snippet above is : a controller. 
   Or at least the same part of the controller that we identify as such 
in web MVC frameworks (the web server and request to handlers mechanism 
being the other, less visible but still present part). Having the 
controller's code mixed up with the view is pretty common in GUI 
toolkits, and not so uncommon in "server pages" frameworks.


> I dislike
> a controller that calls and routes functionality based on the URL.

Oh yes ? And how is it so different from having the web server routing 
to requests to .asp files calls based on a url-filesystem mapping ?-) 
Except, of course, that getting rid of the filesystem mapping decouples 
the app's urls scheme from the source code inner organisation ?

> The
> M (model) functionality is covered by the WSC files. The V (view) are
> the asp pages themselves. The controller part is handled by the asp
> pages aswell, just using regular links, GETs and POSTs in forms.
> 
>> But, IMHO, writing PHP-style Python webapp is silly.
> 
> :) Maybe I need to pick up a new style of programming as well, on top
> of just a new language...

Given your above explanations, I don't think going the "full" MVC route 
would require that much changes to your current habits. That is mostly: 
splitting the controller part from the view part, and learn to declare 
your url mapping instead of physically structuring your source depending 
on the url scheme.

>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>> committing suicide by shooting yourself into the head with PHP ...
> 
> LOL, point taken.
> 
> So to summarize: it should be possible to get exactly what I want, but
> it's not advisable, because the frameworks aren't designed to work
> like this. That makes sense.
> I want to thank you guys for all the advice, I have a lot of
> frameworks and template-engines to look into now, I'll have a look at
> all that you mentioned to see which one suits me best. Judging from
> the quick and thorough support from the Python community, I think I
> will stick with a proven framework and/or style, so I can ask a
> question once in a while.

May I suggest Pylons ? It's not yet the more stable and finished option, 
but from what I know of 'classic' ASP and how you explained to usually 
work, I think you might be confortable with it.

> There is probably less sense in trying to pick up a new language while
> at the same time trying to stick to the methods I used in an old
> language.

Hear hear !-)

> But hey, I thought, maybe a thing like this already exists
> exactly like I want it... Ah well.
> 
> Thanks again all, take care!
> 
> Erik
> 
> 
> 


From dullrich at sprynet.com  Fri May 30 10:34:38 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:34:38 -0500
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
Message-ID: <dullrich-8B8493.09343730052008@text.giganews.com>

In article <mailman.1763.1212139351.12834.python-list at python.org>,
 "Skonieczny, Chris" <Skonieczny.C at emssatcom.com> wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here: 
> http://mail.python.org/pipermail/python-list/2007-February/427841.html  

Why? There's nothing wrong there.

> It is not true - eg. try : 
> a='P'            # P is ASCII , isn't it ? 
> b=int(a)
> and what you will get ? An error !!!

You really don't see any difference between
"convert '1' to an integer" and "convert 'P' to an integer"?

In case there's actually a problem you're trying to solve
here, try ord instead of int.

> Or probably you yourself should - quote : 
> "You probably should go through the tutorial ASAP that is located here:
> 
> http://docs.python.org/tut/ "
> 
> ---------------------------------------------------------------------
> [Image]

-- 
David C. Ullrich


From python at rcn.com  Wed May 14 20:01:16 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 14 May 2008 17:01:16 -0700 (PDT)
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
Message-ID: <c40b3f66-2ffc-4654-ad85-782bd25d5312@i36g2000prf.googlegroups.com>

On May 14, 8:24?am, Tal Einat <tal.no.no.s... at gmail.com> wrote:
> I just ran into this. In IDLE (Python 2.5), the call-tip for
> itertools.count is:
> "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

My IDLE (1.2.2 running on Python 2.5.2) has the correct call-tip. I
don't know why yours is different.  Also, help(itertools.count) does
the right thing.

Raymond




From deets at nospam.web.de  Fri May 23 05:44:58 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 11:44:58 +0200
Subject: pyserial and file open conflict?
In-Reply-To: <88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
Message-ID: <69ni0qF3499pqU1@mid.uni-berlin.de>

> 
> Do you have to much time?

Maybe you have enough time to read this:

http://www.catb.org/~esr/faqs/smart-questions.html

Diez


From sjmachin at lexicon.net  Tue May 13 18:41:16 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 22:41:16 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1059.1210699996.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>	<68t4o0F2vaoncU1@mid.uni-berlin.de>	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>	<68trmmF2vjivnU1@mid.uni-berlin.de>	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <482a190b@news.mel.dft.com.au>

D'Arcy J.M. Cain wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>> Not everybody has grown in English-speaking community, you know. And
>> knowing math quite good, I prefer writing "x = y" instead of "Set x to
>> y".
> 
> OMG!  It's COBOL.
> 
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  

IIRC the idea was so that managers could write programs in English. It 
failed because nobody could write a parser that would handle something 
like "The bottom line is that the stakeholder group requires the 
situation going forward to be such as to facilitate the variable known 
as x to provide the same outcome when stimulated by dereferencing as the 
variable known as y".


From dullrich at sprynet.com  Tue May 27 11:48:22 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 10:48:22 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
	<mailman.1650.1211901194.12834.python-list@python.org>
Message-ID: <dullrich-A3670A.10482127052008@text.giganews.com>

In article <mailman.1650.1211901194.12834.python-list at python.org>,
 "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:

> 2008/5/27 David C. Ullrich <dullrich at sprynet.com>:
> > On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
> > <deets at nospam.web.de> wrote:
> >
> >>David C. Ullrich wrote:
> >>
> >>> What version added decorators (using the
> >>> @decorator syntax)?
> >>>
> >>> (Is there a general way I could have found out the answer myself?)
> >>>
> >>> Is there a somthing such that "from __future__ import something"
> >>> will make decorators work in 2.5.2?
> >>
> >>They do work. They were introduced in python2.4
> >
> > That's more or less what I thought, but...
> >
> > Oh. Never mind the details, let's just say that having 2.3 and
> > 2.5 installed on the same machine can lead to confusion
> > about exactly which one you're running a script under.
> > Duh.
> >
> > Sorry. Thanks. I don't suppose that decorators are available
> > from __future__ somehow in 2.3?
> >
> 
> Nope, they don't.
> Anyway, decorators are just a syntactic sugar, why would you need this
> feature in 2.3?

I don't _need_ it. Read up about decorators the other day at the
office and couldn't figure out why the same code didn't work at
home...

> >>Diez
> >
> > David C. Ullrich
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >

-- 
David C. Ullrich


From nospam at nospam.invalid  Thu May 29 12:40:38 2008
From: nospam at nospam.invalid (Rahul)
Date: Thu, 29 May 2008 16:40:38 +0000 (UTC)
Subject: yum installs Tkinter in a way visible to only one python installation
Message-ID: <Xns9AAD76CA94F216650A1FC0D7811DDBC81@85.214.90.236>

My RHEL yum package-manager comes with  Python-2.4.3. We also have a 
seperate Python-2.4.4 Installation on our box.

When I added Tkinter using 'yum install tkinter' it seems to have added it 
in a manner that it is exclusively visible to Python-2.4.3. I cannot import 
Tkinter from Python-2.4.4. 

What's the best way to work around this? 

-- 
Rahul


From bignose+hates-spam at benfinney.id.au  Wed May 21 21:12:38 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 May 2008 11:12:38 +1000
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <8763t7dtvd.fsf@benfinney.id.au>

alex23 <wuwei23 at gmail.com> writes:

> On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> > In case it's not clear what I meant: after executing
> > some_function() exception SomeExcpetion gets risen. Then, in
> > except block I do something to fix whatever is causing the
> > exception and then I would like to go back to try block, and
> > execute some_function() again. Is that doable?
> 
> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?

This is LBYL ("Look Before You Leap") programming style, and is
contrasted with EAFP ("it is Easier to Ask Forgiveness than
Permission") style.

    <URL:http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html>

EAFP is usually considered more Pythonic, and usually results in
smaller, clearer code.

I'm currently undecided in this case whether EAFP is correct ? though
I suspect it is, as in most cases. I wanted to address your "why not
LBYL" question though.

-- 
 \          ?Courage is not the absence of fear, but the decision that |
  `\             something else is more important than fear.? ?Ambrose |
_o__)                                                          Redmoon |
Ben Finney


From bearophileHUGS at lycos.com  Sat May 24 13:18:33 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 24 May 2008 10:18:33 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
Message-ID: <06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>

Ben Finney:
>In Python, the philosophy "we're all consenting adults here" applies.<

Michael Foord:
> They will use whatever they find, whether it is the best way to
> achieve a goal or not. Once they start using it they will expect us to
> maintain it - and us telling them it wasn't intended to be used by
> them in the first place won't cut it.

So they will use the methods with one or two underscores too. And
imply that you want to document them too.
They don't seem adult enough, then ;-)
Internal API hiding seems quite less useful if you don't need to let
customers manage your code.

Bye,
bearophile


From jcd at unc.edu  Fri May  2 08:01:19 2008
From: jcd at unc.edu (J. Clifford Dyer)
Date: Fri, 02 May 2008 08:01:19 -0400
Subject: Custom Classes?
In-Reply-To: <4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
Message-ID: <1209729679.6589.23.camel@jcd-desktop>

On Thu, 2008-05-01 at 17:31 -0500, Victor Subervi wrote:
> On Wed, Apr 30, 2008 at 12:35 PM, J. Cliff Dyer <jcd at unc.edu> wrote:
>         Post working code, and I'll answer your actual question.
> 
> Good grief!  The code is *not* double spaced! Take a look. Click to
> the end of the first line and hit the right arrow key, and see for
> yourself.  As for not initializing w, well, I did in my code and just
> forgot to cut and paste that. Same with the except. Sorry on those.
> And yes, I pull out try clauses when I need to look at stacks. Here:

Taking a closer look--it's still double spaced, but I'm sure that's just
something funky in how it's getting rendered along the way.  

That said, your code still doesn't work.  After removing your try
statements, and the corresponding except-pass blocks, I get the
following problems:

Traceback (most recent call last):
  File "test.py", line 5, in <module>
    os.remove(getpic)
NameError: name 'os' is not defined

and when I fix that:

Traceback (most recent call last):
  File "test.py", line 34, in <module>
    print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">'
% pic

Please test your code snippet before you post it.  Testing the program
you extracted it from is not sufficient.

On line 34 (or thereabouts--I had to add a line for import os, and
stripped out all blank lines, since my email client is still rendering
it double spaced), I think you wanted "x" instead of str(x).  At least,
that's what your generated script wants.  str(x) takes the value of the
variable x (not yet defined), and converts it to a str.  It does not
give you a str with a value of "x".  

As for the generated script, why are you creating that on the fly every
time?  Why not just create it as an independent python file?  When you
want an image displayed in another HTML file, static or generated, just
point your src to that python file with the appropriate arguments.

<img src='http://example.com/path/to/getpic.py?x=4'/>

Also, remove the line that says "print 'Content-Type: text/html'."  You
only need one content type, and it should be image/jpeg, or whatever
type your images are.  If you are going to have a few pngs in there as
well, for example, you'll need some mechanism for determining what type
of image the file actually is, and outputting the appropriate header
from:

Content-Type: image/jpeg
?Content-Type: image/png
?Content-Type: image/gif

This could be by checking the file extension, probing the file itself,
or by including the mime-type in your pics dictionary like so:

pics = {1: ('pic1', 'image/jpeg'), 2: ('pict_num_two', 'image/png')} 


Then, of course, you'll have to revise how you retrieve the information.

That should be enough to get you moving in the right direction.

Cheers,
Cliff
> 
> 
> w = 0
> 
> 
> try:
> 
>   w += 1
> 
>   getpic = "getpic" + str(w) + ".py"
> 
>   try:
> 
>     os.remove(getpic)
> 
>   except:
> 
>     pass
> 
>   code = """
> 
> #!/usr/local/bin/python
> 
> import cgitb; cgitb.enable()
> 
> import MySQLdb
> 
> import cgi
> 
> import sys,os
> 
> sys.path.append(os.getcwd())
> 
> from login import login
> 
> user, passwd, db, host = login()
> 
> form = cgi.FieldStorage()
> 
> picid = int(form["id"].value)
> 
> x = int(form["x"].value)
> 
> pics =
> {1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
> 
> 9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
> 
> pic = pics[x]
> 
> print 'Content-Type: text/html'
> 
> db = MySQLdb.connect(host=host, user=user, passwd=passwd, db=db)
> 
> cursor= db.cursor()
> 
> sql = "select " + pic + " from products where id='" + str(picid) +
> "';"
> 
> cursor.execute(sql)
> 
> content = cursor.fetchall()[0][0].tostring()
> 
> cursor.close()
> 
> print 'Content-Type: image/jpeg'
> 
> print
> 
> print content
> 
> """
> 
>   script = open(getpic, "w")
> 
>   script.write(code)
> 
>   print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">'
> % pic
> 
>   print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d,
> y)
> 
> except:
> 
>   pass
> 
> 
> TIA,
> Victor
> 
-- 
Oook!
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From d.a.abernathy at gmail.com  Wed May  7 16:43:05 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 7 May 2008 13:43:05 -0700 (PDT)
Subject: Looking for Fredrik Lundh; documentation and code examples for 
	elementtree
Message-ID: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>

Hello All,

I am trying to get in touch with Mr. Lundh. I am looking for exmaple
code regarding the use of elementtree. I have read through most of the
examples on http://effbot.org and I am hoping he can suggest some
others. Additionally, I am hoping he can give me an example use of the
comment method. I have tried a couple times, but I can not figure it
out. Thank you so very much.

DJ


From notnorwegian at yahoo.se  Fri May 23 23:25:46 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 20:25:46 -0700 (PDT)
Subject: simple url regexp
Message-ID: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>

url = re.compile(r"((http|ftp|https)\:\/\/)(www)?([a-zA-Z]{1}([\w\-]+
\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+
\.[\w]{3,4})?((\?\w+=\w+)?(&\w+=\w+)*)?")

damn i hate these things.

i want it to only match http://www.name.any/etc

not http://wiki.x etc



From marlin_rowley at hotmail.com  Thu May 15 15:50:54 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 14:50:54 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C6E59.3020503@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com> 
	<482C6E59.3020503@islandtraining.com>
Message-ID: <BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>


Gary,

I'm getting streaming tile data from a renderer in order to allow the user to see the rendering of tiles in real-time to create the total image.  I'm NOT reading an entire image scanline-by-scanline.  The renderer streams in a series of floats (for each tile) and I build this tile up from each individual color component passed in.  I then convert it to a small bitmap and blit() it to the window that will eventually make up my entire image.  I'm just wanting to make the process as fast as the renderer can render the tiles.  I've noticed on scenes that aren't very complex for the renderer that my python script is spending most of it's time drawing while the renderer is already done.  What you've given me has sped up the drawing a lot, but I'm hungry for more optimization!

There is no file format to be read.  The data is raw bytes and can be any format.

> Date: Thu, 15 May 2008 10:09:45 -0700
> From: gherron at islandtraining.com
> CC: python-list at python.org
> Subject: Re: How do I use the unpack function?
> 
> John Machin wrote:
> > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> >   
> >> Marlin Rowley wrote:
> >>     
> >>> All:
> >>>       
> >>> I've got a script that runs really slow because I'm reading from a
> >>> stream a byte at a time:
> >>>       
> >>> // TERRIBLE
> >>> for y in range( height ):
> >>>         for color in range(4):
> >>>             for x in range( width ):
> >>>                 pixelComponent = fileIO.read(4)
> >>>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE
> >>>       
> >
> > [snip]
> > Perhaps the OP might be able to use the Python Imaging Library (PIL)
> > instead of reinventing an image-file handler.
> >   
> 
> Indeed.  That's why my original answer included the line:
>     There are probably better ways overall, but this directly answers 
> your question.
> 
> Other possibilities.
> 
> I don't recognize the file format being read in here, but if it is a 
> standard image format, the PIL suggestion is a good way to go.
> 
> Or, if it is an image of not too enormous size, read the *whole* thing 
> in at once. 
> 
> Or rather than manipulate the array by carving off 4 bytes at a time, 
> just index through it in 4 byte chunks:
>   for i in range(width):
>       buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> 
> Or
>   for i in range(0,4*width,4):
>       buffer = unpack("!f", pixelComponent[i:i+4])
> 
> Or
>   Use numpy.  Create an array of floats, and initialize it with the byte 
> string, making sure to take endianess int account.  (I'm quite sure this 
> could be made to work, and then the whole operation is enormously fast 
> with only several lines of Python code and *no* Python loops.
> 
> Or
>   ...?
> 
> Gary Herron
> 
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >   
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Windows Live SkyDrive lets you share files with faraway friends.
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From johnjsal at NOSPAMgmail.com  Tue May 27 13:49:37 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 27 May 2008 13:49:37 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <483c4ac8$0$7286$c3e8da3@news.astraweb.com>

"cm_gui" <cmgui2 at gmail.com> wrote in message 
news:5ccb8e61-ad53-48aa-b6ac-a6034907c36c at a32g2000prf.googlegroups.com...

> okay, maybe Python is only slightly slower than PHP,
> but it APPEARS to be much slower.

> there is a distinct waiting time whenever you access a python web page
> before the page starts loading.  but once it loads, it is fast.

> php page starts loading immediately once you access it,
> but you can see the page slowly loading.
> because you see the page starts loading immediately, you feel it is
> fast.

::crickets:: 




From hat at se-162.se.wtb.tue.nl  Mon May 19 04:19:38 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 19 May 2008 10:19:38 +0200
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <slrng32e0q.egt.hat@se-162.se.wtb.tue.nl>

On 2008-05-19, ivarnelispam at gmail.com <ivarnelispam at gmail.com> wrote:
> Hello all,
>
> I'm starting work on what is going to become a fairly substantial
> Python project, and I'm trying to find the best way to organize
> everything. The project will consist of:
>
> - A few applications
> - Several small scripts and utilities
> - Unit tests and small interactive test programs
> - A number of custom libraries and modules that may be shared and
> referenced among all of the above
>
> I have the following general structure in mind:
>
> myproject/
>   app1/
>     main.py
>     file1.py
>     file2.py
>     tests/
>       test_abc.py
>       test_xyz.py
>   app2/
>     ...
>   scripts/
>     script1.py
>     script2.py
>   shared/
>     mylib1/
>       file1.py
>       file2.py
>       tests/
>         test_foo.py
>         test_bar.py
>     mylib2/
>       ...
>
>
> The files that you might want to execute directly are:
>   - Any of the "main.py" files under app*/
>   - Any of the files under shared/
>   - Any of the files under app*/tests or shared/mylib*/tests
>
> So, my questions:
> First of all, does this look like a reasonable overall structure, or
> are there better alternatives?

You could make a 'bin' directory next to 'myproject' with executable programs
which would usually do something like

#!/usr/bin/env python
from myproject.app1 import main
main.run()

to make a more clear seperation between code that can be executed and code that
is imported in an application.


Also, why do you make a distinction between shared and non-shared code?
You could simply eliminate 'shared' directory, and put its contents directly
under myproject.

> Second (and the thing I'm primarily interested in), what is the best
> way to deal with importing the shared modules in the applications,
> scripts, test programs, and possibly other shared modules? I think the
> most obvious solution is to add /path/to/myproject to PYTHONPATH.
> However, this seems like an annoying little dependency that you are
> likely to forget whenever you move your workspace to a new path, open
> up a branch of the project in a different directory, or download and
> work on the project using a different computer.

What I am missing here is how you plan to do the development.
If you want to do branch-based development, you may want to have a look at
Combinator (at divmod.org). It handles branch management, adds executable
programs from bin to your path (in your current branch), and extends PYTHONPATH
(with your current branch).

Even if you have just 1 branch (namely 'trunk') it may be useful.


> Is there a way to set this up that is a bit more self contained? For
> example, at first I was somewhat hopeful that Python could ascend
> parent directories until it reached a directory that did not include
> an __init__.py file, and it could use this as a root for referring to
> packages and modules from any file contained within. (e.g. in the
> example project above, any file could refer to myproject.shared.mylib1
> so long as 'myproject' and all subdirectories contained an
> __init__.py, and the parent of 'myproject' didn't contain such a
> file). Evidently this is not the case, but it seems like it could be a
> useful feature in these situations.

Work is being done on relative imports. Not sure of its state.

> Anyway, I'm sure this is not an unusual situation, so I'm curious to
> hear how other people have handled it.

Most people probably run scripts from the root, ie where 'myproject' is a
sub-directory. Since Python automatically adds '.' to its path, it will work.

Sincerely,
Albert


From paddy3118 at googlemail.com  Tue May 27 03:43:18 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 27 May 2008 00:43:18 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net>
Message-ID: <6382bf6f-3478-4a88-8f43-3b38c20d3b85@l64g2000hse.googlegroups.com>

On May 27, 7:42 am, "inhahe" <inh... at gmail.com> wrote:
> Well, I just need it once in a while.  Actually now is the only time I
> remember.  The last time what I needed was a file name extension.  I want a
> string called headers, but I want to derive a dict from it, also called
> headers.  So I figured the string would be called strHeaders, and the dict,
> dctHeaders probably, but when a precedent for something like that exists, I
> like to use it.
>
> "Kam-Hung Soh" <kamhung.... at gmail.com> wrote in message

I have a my own sometime used convention od using dict names that
mirror
what is being mapped to what, so a dict mapping headers to body might
be called head2body, in general a mapping from x to y I might call
x2y.

- Paddy.


From deets at nospam.web.de  Sun May 25 10:50:57 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 16:50:57 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69tcmkF357g9nU1@mid.uni-berlin.de>


> Here's an example of why *running* tests in order can make sense.
> 
> You could have a bunch of tests of increasing complexity.  The first bunch 
> of tests all run in a few seconds and test some basic functionality.  From 
> experience, you also know that these are the tests that are most likely to 
> fail as you port to a new environment.
> 
> There's also some tests which take a long time to run.  If the basic stuff 
> that's being tested by the earlier tests doesn't work, there's no way these 
> tests could pass, but they still take a long time to fail.
> 
> It's really handy to have the simple tests RUN first.  If you see they 
> fail, you can cancel the rest of the test run and get on with fixing your 
> code faster.

I don't see this as something that can be solved by ordering tests - 
*especially* not on a per-method-level as the OP suggested, because I 
tend to have test suites that span several files.

Instead when I've been in the situation that you describe before, I 
resorted to an approach where I annotated tests as long or short-running 
(or any other criteria), and then ran the tests that were appropriate.

For example, post-commit-tests needed to be short, as otherwise the 
feedback came to slow.

  Annotation could be done explicit, or implicit by grouping tests 
together that had the desired property. However, as I prefer tests that 
share e.g. the same module to test the same functionality, I rather have 
an annotation mechanism.

So *if* anything should be changed IMHO it would be the introduction of 
a tagging system or something equivalent, together with a selection 
mechanism based on that.

> It's a good thing to make it easy to do things the right way, and difficult 
> to do things the wrong way.  The danger is when you let your pre-conceived 
> notions of right and wrong trick you into making it difficult to do things 
> any way but YOUR way.
> 
> So far, the strongest argument I've seen against the OP's idea is that it's 
> not portable to Iron Python.  That's a legitimate argument.  All the rest 
> of the "You're not supposed to do it that way" arguments are just religion.

So far the reasons for introducing them haven't been compelling either. 
Neither does it work over several testsuites, nor is it the only thing 
that can order *results*, which you (rightly so) claimed as being useful.

Diez


From bbcofchina at yahoo.com.cn  Fri May  9 09:46:46 2008
From: bbcofchina at yahoo.com.cn (=?gb2312?q?<=CE=AB=B7=BB=B7=E7=F3=DD>?=)
Date: Fri, 9 May 2008 21:46:46 +0800 (CST)
Subject: =?gb2312?q?=BB=D8=B8=B4=A3=BA=20Re:=20Pythonwin?=
In-Reply-To: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
Message-ID: <166810.62945.qm@web15001.mail.cnb.yahoo.com>


  In arcgis dvd , you can find a "desktop" file ,open the file ,then a "pythonwin" file,open the file ,then you install "pywin32-207.win32-py2.4.exe"
  THIS IS OK!
Banibrata Dutta <banibrata.dutta at gmail.com> ???
    if one has installed ActiveState Python 2.5, I think it'd have been 
  Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
  and I think it delivers IDLE, not PythonWin.
  
 
  On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:   On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??
>
> Thanks
>
> Clive

I have PythonWin installed in my Start Menu --> Programs --> Python
2.5. I may have installed the ActiveState version though. Just check
if it's there on your system and if not, you can follow Niklas's
advice.

Mike

--
http://mail.python.org/mailman/listinfo/python-list




-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com --
http://mail.python.org/mailman/listinfo/python-list

       
---------------------------------
 ????????????
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From upton at virginia.edu  Wed May 21 13:05:56 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 13:05:56 -0400
Subject: can someone with guessing a number
In-Reply-To: <9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
	<9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
Message-ID: <5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>

On Wed, May 21, 2008 at 12:55 PM, abhilash pp <afilash+python at gmail.com> wrote:
>> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
>>>
>>> I would just like the program to exit after guessing the amount of
>>> numbers wrong
>>>
>>> # Guess My Number
>>> import random
>>> the_number = random.randrange(100) + 1
>>> tries = 1
>>> # guessing loop
>>> while (guess != the_number):
>>>     if (guess > the_number):
>>>         print "Lower..."
>>>     else:
>>>         print "Higher..."
>>>
>>>     guess = int(raw_input("Take a guess: "))
>>>     tries += 1
>>>     if tries > 10:
>>>         print 'you failed- give up'
>>>
>>> print "You guessed it!  The number was", the_number
>>> print "And it only took you", tries, "tries!\n"
>>>
>>> raw_input("\n\nPress the enter key to exit.")
>>>
>>> many Thanks
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>
>     if tries > 10:
>         print 'you failed- give up'
>         break
> <------------------- use this
>

That won't work as written, because it'll print "you failed," then
break, then print "You guessed it!"...

As an alternative to what I suggested before, if you really just want
to end the program, you could also do

from sys import exit

<rest of code>

    if tries > 10:
        print 'you failed- give up'
        exit()


From bj_666 at gmx.net  Mon May  5 01:14:47 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 5 May 2008 05:14:47 GMT
Subject: Truncate beginning of a file
References: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>
Message-ID: <687je7F2rh7pkU1@mid.uni-berlin.de>

On Sun, 04 May 2008 22:06:42 -0700, s0suk3 wrote:

> file.truncate(X) will truncate the file to at most X bytes (i.e. leave
> the first X bytes of the file and throw away the rest). Is there a way
> to throw away, say, the first X bytes of the file, and leave the rest?
> (Without opening the same file for reading, reading and processing,
> overwriting the file with the new processed data, etc.)

No.

Ciao,
	Marc 'BlackJack' Rintsch


From badmuthahubbard at gmail.com  Thu May  8 17:30:28 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Fri, 9 May 2008 00:30:28 +0300
Subject: Python GUIs and custom controls
In-Reply-To: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <8200bab70805081430w59b7b0c5r814b3f6cab112629@mail.gmail.com>

I likewise don't know enough to compare between toolkits, but another
one to check out might be pygame.  If nothing else, it is meant to be
fast and to handle 3D views.

-Chuckk

On Fri, May 9, 2008 at 12:10 AM, Joe P. Cool <joe.p.cool at googlemail.com> wrote:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.
>
> Joe
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From unknown_hero007 at hotmail.com  Wed May  7 01:31:49 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 22:31:49 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
Message-ID: <de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>

Tim Golden wrote:

> Well, I attach a kind of explanatory Noddy example I wrote a few years ago
> for someone on the python-win32 list. I think, glancing over it, that it includes
> what you need to know, although not necessarily in the right order. I'm happy to
> explain if things aren't clear:
>
> <code>
> import _winreg
>
> HKLM = _winreg.HKEY_LOCAL_MACHINE
>
> #
> # Set up a registry subtree under HKLM\Software
> # which will look like this:
> #
>
> #
> # TimSoft
> # |
> # +-- App1
> # |
> # +-- App2
> # |
> # +-- App3
> #
>
> #
> # The [TimSoft] key has a default (ie unnamed) value
> # while the Appx keys each have two values:
> # ? [Registered] - a string Y/N value
> # ? [Version] - a DWORD value
> #
>
> hSoftware = _winreg.OpenKey (HKLM, "Software")
> hTimSoft = _winreg.CreateKey (hSoftware, "TimSoft")
>
> _winreg.SetValueEx (hTimSoft, None, 0, _winreg.REG_SZ, "All Tim's Software")
>
> hApp1 = _winreg.CreateKey (hTimSoft, "App1")
> _winreg.SetValueEx (hApp1, "Version", 0, _winreg.REG_DWORD, 101)
> _winreg.SetValueEx (hApp1, "Registered", 0, _winreg.REG_SZ, "Y")
>
> hApp2 = _winreg.CreateKey (hTimSoft, "App2")
> _winreg.SetValueEx (hApp2, "Version", 0, _winreg.REG_DWORD, 202)
> _winreg.SetValueEx (hApp2, "Registered", 0, _winreg.REG_SZ, "N")
>
> hApp3 = _winreg.CreateKey (hTimSoft, "App3")
> _winreg.SetValueEx (hApp3, "Version", 0, _winreg.REG_DWORD, 303)
> _winreg.SetValueEx (hApp3, "Registered", 0, _winreg.REG_SZ, "Y")
>
> #
> # NB - no need to do an explicit "write": the Registry uses
> # ?some sort of caching which eventually catches up with itself,
> # ?so unless you plan to turn the machine off soon, don't
> # ?bother with FlushKey or anything like that.
> #
>
> #
> # Now we start again, as though we were just querying
> #
>
> hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
> n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey (hTimSoft)
> print n_sub_keys, "sub keys", n_values, "values", last_modified, "nanoseconds since 1600!"
>
> #
> # Pick up the default value: really should try to
> # ?interpret the default_type to determine if it's
> # ?a number or a string or whatever, but...
> #
> default_value, default_type = _winreg.QueryValueEx (hTimSoft, None)
> print "Default value:", default_value
>
> #
> # Now, in this case I know (because I created them) that
> # ?the TimSoft key has three subkeys, each of which has
> # ?two values. But if I didn't...
> #
> print
> for i in range (n_sub_keys):
> ? subkey_name = _winreg.EnumKey (hTimSoft, i)
> ? print subkey_name
>
> #
> # Alternatively, if I hadn't done the QueryInfoKey above...
> #
> i = 0
> print
> while 1:
> ? try:
> ? ? subkey_name = _winreg.EnumKey (hTimSoft, i)
> ? except EnvironmentError:
> ? ? break
> ? else:
> ? ? print subkey_name
> ? ? i += 1
>
> #
> # Now, let's use the last key as an example
> # ?and pick out its values.
> #
> print
> print subkey_name
> hAppKey = _winreg.OpenKey (hTimSoft, subkey_name)
> i = 0
> while 1:
> ? try:
> ? ? name, value, type = _winreg.EnumValue (hAppKey, i)
> ? ? print name, value, type
> ? except EnvironmentError:
> ? ? break
> ? else:
> ? ? print " ?%s => %s (type %s)" % (name, value, type)
> ? ? i += 1
>
> </code>
>
> TJG

Correct me if I'm wrong (which I just might be), but doesn't the above
code go through the keys behind HKEY_LOCAL_MACHINE\Software\Timsoft\ ?

Is it possible to use an empty value in:

  hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")

like:

  hTimSoft = _winreg.OpenKey (HKLM, "")

so it would go all subkeys behind the "root" (in this case,
HKEY_LOCAL_MACHINE)?


The code is supposed to work even if I don't know all possible subkeys
under HKEY_LOCAL_MACHINE. Creating dozens or hundreds of handles like
the above is a bit... unappealing.

Can I also use HKLM in the place of hTimSoft when I want to determine
the amount of subkeys it has, like you did over here:

  n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey
(hTimSoft)


Anyway, the above code seems interesting. I'll try a few tweaks here
and there and see what happens.

Thank you, Tim.


From rong889 at gmail.com  Tue May 13 00:48:50 2008
From: rong889 at gmail.com (rong889 at gmail.com)
Date: Mon, 12 May 2008 21:48:50 -0700 (PDT)
Subject: Chinese names in Python source
References: <72f078a8-a9e3-4b1c-8f21-ea5633654672@b5g2000pri.googlegroups.com>
Message-ID: <1fcff13f-d31f-4b89-8739-1263a4bfbb73@z24g2000prf.googlegroups.com>

On 5?13?, ??11?36?, "kirby.ur... at gmail.com" <kirby.ur... at gmail.com>
wrote:
> It's probably not news to anyone here that Python 3 gives us
> access to the unicode codespace for Python names, not just
> string literals, meaning our functions and classes, lists and
> dictionaries, might go outside Latin-1 for their source code
> representation.
>
> I have an example in my blog:http://mybizmo.blogspot.com/2008/05/chinese-names-in-python.html
>
> If others have Python source with names in other languages,
> that might be fun to see.  Images are probably better than actual
> source code, as it's up to the font library to render unicode
> properly and many Python text editors aren't prepared to render
> all these characters (yet).
>
> I used lucidabright in IDLE for my screen shot (Ubuntu 8.4 laptop).
>
> Kirby
> Portland, OR

.........................................
http://cashpickup.net


From ivan.illarionov at gmail.com  Mon May 26 04:47:33 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 08:47:33 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<mailman.1598.1211789506.12834.python-list@python.org>
Message-ID: <g1dtf5$225p$1@news.mtu.ru>

On Mon, 26 May 2008 10:11:22 +0200, Max M wrote:

> Jerry Stuckle skrev:
>> Ivan Illarionov wrote:
> 
>> I repeat.  The language has nothing to do with it.  Good programmers
>> write good code.  Lousy programmers write bad code.
> 
> That is simply not true!
> 
> The languag has a lot to do with what you can do in any given time.
> 
> You can write good code in a bad language. But it will take lot more
> time. And so it will not be done.
> 
> Your argument, if it was true, would mean that I could just as well
> write a blog in c or even assembler, and still write optimal code.
> 
> 
> php is a terrible language and I cringe whenever I have to use it. In
> fact I have turned down many jobs because they were written in php. It
> is simply to frustrating.

I want to cite Paul Graham on this topic:

"it's all based on one unspoken assumption, and that assumption turns out 
to be false. The pointy-haired boss believes that all programming 
languages are pretty much equivalent. If that were true, he would be 
right on target. If languages are all equivalent, sure, use whatever 
language everyone else is using.

But all languages are not equivalent, and I think I can prove this to you 
without even getting into the differences between them. If you asked the 
pointy-haired boss in 1992 what language software should be written in, 
he would have answered with as little hesitation as he does today. 
Software should be written in C++. But if languages are all equivalent, 
why should the pointy-haired boss's opinion ever change? In fact, why 
should the developers of Java have even bothered to create a new language?

Presumably, if you create a new language, it's because you think it's 
better in some way than what people already had. And in fact, Gosling 
makes it clear in the first Java white paper that Java was designed to 
fix some problems with C++. So there you have it: languages are not all 
equivalent. If you follow the trail through the pointy-haired boss's 
brain to Java and then back through Java's history to its origins, you 
end up holding an idea that contradicts the assumption you started with.

So, who's right? James Gosling, or the pointy-haired boss? Not 
surprisingly, Gosling is right. Some languages are better, for certain 
problems, than others. And you know, that raises some interesting 
questions. Java was designed to be better, for certain problems, than C+
+. What problems? When is Java better and when is C++? Are there 
situations where other languages are better than either of them?"
and so on at
http://www.paulgraham.com/icad.html

I tend to share PG's opinions on the subject (though I think that Python 
is superior to Lisp :-).

The argument that "the language has nothing to do with it" is an old  
pointy-haired boss argument. I doubt that a person who think this way can 
be a really good programmer.

Ivan


From dmitrey.kroshko at scipy.org  Sun May 18 07:09:56 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 04:09:56 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<5P6dnTMRFrUXL7LVnZ2dnUVZ_uSdnZ2d@earthlink.com>
	<092bbffb-3325-45d4-9714-0dd1fba2ea82@k1g2000prb.googlegroups.com>
Message-ID: <e3afbc1c-d353-4bad-9411-c33bc084c14b@l64g2000hse.googlegroups.com>

Along with numpy & scipy there is some more Python scientific soft
worse to be mentioned:

http://scipy.org/Topical_Software
http://pypi.python.org/pypi?:action=browse&show=all&c=385

On 18 ???, 06:25, Henrique Dante de Almeida <hda... at gmail.com> wrote:
> once I
> looked for linear programming toolkits for python and IIRC, I only
> could find a trivial wrapper for glpk (called pulp).

You could be interested in OpenOpt, it has connections to LP solvers
glpk, cvxopt's one and lp_solve (former & latter allows handling MILP
as well)

http://scipy.org/scipy/scikits/wiki/LP


From johnjsal at NOSPAMgmail.com  Wed May 14 22:30:33 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:30:33 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>

On Tue, 13 May 2008 08:24:35 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python

I respectfully disagree.

> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.

That's truly disappointing.

> This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.

FT seems like all "awkwardnesses" to me.


From http  Wed May 21 18:44:39 2008
From: http (Paul Rubin)
Date: 21 May 2008 15:44:39 -0700
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <7xwslnwa3s.fsf@ruckus.brouhaha.com>

notbob <notbob at nothome.com> writes:
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?

php is very easy to get started with and some big sites have been
written in it.  There is lots of low cost php hosting available.  It
is not as good a language as Python.  However, Python's advantages are
strongest in more complex projects.  For simple stuff, php is frankly
less hassle just because of its wide deployment and that extensive
function library that the blog post your quoted described as a bad
thing.  Python's libraries are not bad, but php's are more intensely
focused on web apps and includes what you need as part of the standard
build.  With Python, if you want a database adapter or web template
framework, you have to choose between a bunch of different ones and
download and configure it which often involves head scratching when
the auto-install stuff hits some quirk of your system.  With php, it's
all right there when you flip the switch.

Knowing lots of languages is good for you.  php is probably your
quickest route to getting a rudimentary web app running.  Python
is a longer term project.  Do both.


From stef.mientki at gmail.com  Sat May 24 08:15:39 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 14:15:39 +0200
Subject: SQLite import fails sometimes ?
In-Reply-To: <4837f7d1$1@news.mel.dft.com.au>
References: <mailman.1520.1211623228.12834.python-list@python.org>
	<4837f7d1$1@news.mel.dft.com.au>
Message-ID: <483806EB.50007@gmail.com>

John Machin wrote:
> Stef Mientki wrote:
>> hello,
>>
>> The import statement "import sqlite3" gives the error given below.
>> In simple programs, the import statement (sometimes) succeed,
>> and I can indeed access the database.
>> So I guess there is some conflict with another part of my program,
>> but as the program is rather large (and dynamic) it's not easy to 
>> isolate the problem.
>> Does anyone has a clue how to trace this kind of problem ?
>>
>> thanks,
>> Stef
>>
>> Traceback (most recent call last):
>>  File "bricks\brick.py", line 322, in Exec
>>    self.Generate_Output_Signals ()
>>  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
>>    import sqlite3
>>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
>
> Is P: a network drive? If not, what is it?
P is just a normal local drive,
> I presume from the fact that the next part of the path is not 
> \Python25\Lib that you have not performed a default installation; 
> other than the changes to the path name, what else have you done?
Indeed, the only thing I've changed is the pathname.
I also installed

    * install python  2.5.2 msi
    * install numpy  1.0.4
    * install scipy  0.6.0
    * install wxPython + docs-demo  2.8.7.1 unicode
    * install MatPlotLib  0.91.2
    * install Pygame + docs  1.8.0
    * install SendKeys  0.3
    * install PyScripter  1.7.2 ,  updated to 1.9.9.1 !!!
    * install Rpyc  3.0
    * install ConfigObj  4.5.2 ,  unpack in sitelibs and run  "python 
      setup.py  install"

I don't know if this matters, but I also use sqlite3 from other than 
Python programs.

> What version of Python are you using? What version of Windows?
Windows-XP - sp2
>
>>    from dbapi2 import *
>>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>>    from _sqlite3 import *
>> ImportError: DLL load failed: Invalid access to memory location.
>
> Looks like the problem could be with your copy of _sqlite3.pyd (pyd == 
> Python DLL)
>
> Try why I did below and tell us how far you got.
> Cheers,
> John
>
> === try this ===
> C:\junk>python
> Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from _sqlite3 import *
> >>> import _sqlite3
> >>> _sqlite3.__file__
> 'c:\\python25\\DLLs\\_sqlite3.pyd'
> === end ===
==== looks identical to me  ====
C:\Documents and Settings\Administrator>python
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from _sqlite3 import *
 >>> import _sqlite3
 >>> _sqlite3.__file__
'P:\\Python\\DLLs\\_sqlite3.pyd'
==== end =====

Any other suggestions ?

thanks,
Stef


> -- 
> http://mail.python.org/mailman/listinfo/python-list



From cokofreedom at gmail.com  Wed May  7 10:15:48 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 7 May 2008 07:15:48 -0700 (PDT)
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <1f15edf4-5e0b-4faa-a0ae-d1a02ec0d201@x41g2000hsb.googlegroups.com>

On May 7, 4:08 pm, brad <byte8b... at gmail.com> wrote:
> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
>    # How do I do the following line?
>    if key not in second_dict or if it is, but has has the wrong value,
> then let me know

Well

for k, v in first_dict.items():
  if k not in second_dict or k in second_dict and k[v] !=
second_dict[k]:
    let you know?


From python at bdurham.com  Fri May  2 09:17:18 2008
From: python at bdurham.com (python at bdurham.com)
Date: Fri, 02 May 2008 09:17:18 -0400
Subject: Best way to store config or preferences in a multi-platform way
Message-ID: <1209734238.24342.1251068097@webmail.messagingengine.com>

Lance,

> I am still undecided if the ability for the user to edit the file independently of the program is a good or bad thing.

I prefer user viewable plain (non-XML) text files because:

- easy to make a change in case of emergency
- easy to visually review and search
- easy to version control, diff, and optionally spellcheck
- easy to translate
- easy to generate programmatically
- less opportunity for corruption
- best compression

IMO, the 3 biggest advantages are:
- easy to make field changes in case of emergency
- diff
- less opportunity for corruption

Interesting thread. I'm looking forward to hearing what others say on
this topic.

Regards,
Malcolm 


From andrej.panjkov at climatechange.qld.gov.au  Thu May  8 21:57:03 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Thu, 8 May 2008 18:57:03 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
Message-ID: <bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>

On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:

>
> No, no, no, no, no!
>

Geez.  Go easy.

> You have got it entirely wrong here. Your XOR function simply returns a
> function which gives you the result of xoring the parameters AT THE TIME
> WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set
> cream and icecream (otherwise the call to XOR would have thrown an
> exception) and at leas one was true. Try setting them both False at the
> beginning:
>
> >>> cream = False
> >>> icecream = False
> >>> topping = XOR( cream, icecream)
> >>> cream = True
> >>> icecream = False
> >>> print topping()
>
> False
>

Ok. I understand this better now.  I did say I found the documentation
rather terse on this.

> Using a lambda was a completely pointless exercise here, you could have
> just returned the result directly:


If I try out a new language, I try to exercise those parts of the
language that are new to me.  Now I saw lambdas, an interesting
structure I hadn't seen before. So I tried them out.  I get to learn a
little at the same time as scripting.  That was the "point".  I only
get to optimise my use of a language by trying out various corners of
it.

> def TFF(x,y,z) :
>   return x and not y and not z
>
> AddOnly = TFF( options.AddAction, options.ReplaceAction,
> options.DeleteAction )
> DeleteOnly = TFF( options.DeleteAction, options.AddAction,
> options.ReplaceAction )
> ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
> options.DeleteAction )
>
> if not (DeleteOnly or AddOnly or ReplaceOnly):
>   print "Error:  Exactly one of  [ --add | --replace | --delete ]
> allowed. "
>   parser.print_help()
>   exit
>
> which boils down to:
>
> if (options.AddAction + options.ReplaceAction +
>         options.DeleteAction) != 1:
>     print "Error: ..."

Indeed, there are many ways this could be done.  Some are more
concise, some are more efficient.  As I said, I did it the way I did
it to try out lambdas.  Your way achieves the result, rather elegantly
I think, but teaches me nothing about using lambdas.

Pardon my tetchiness, but it is a little hard to receive such blunt
and inflexible replies to my posts.

Both the responses offer lambda free alternatives.  That's fine, and
given the terse documentation and problems that I had understanding
them, I would agree.  So what applications are lambdas suited to?  I
think the parameterised function model is one.
What else?


From gherron at islandtraining.com  Thu May 15 12:51:22 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 09:51:22 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<482C60AB.2060406@islandtraining.com>
	<BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
Message-ID: <482C6A0A.8080308@islandtraining.com>

Marlin Rowley wrote:
> Thanks for the advice!
>  
> However, I assumed that:
>  
> fourbytes = pixelComponent[:4]
>  
> would shave that byte off the array in pixelComponent.  So that the 
> array is smaller by one on the next iteration.  Is this not the case?
You don't need the newsgroup to answer this kind of question.  Just try it!

 >>> a = 'abcdefghi'
 >>> b = a[:4]
 >>> print a,b
abcdefghi abcd

Notice that the [:4] index does not change the original array.

Gary Herron



>  
> I'm getting weird results now..
>  
> -M
>
>
>
>
> ------------------------------------------------------------------------
>
> > Date: Thu, 15 May 2008 09:11:23 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > Marlin Rowley wrote:
> > > All:
> > >
> > > I've got a script that runs really slow because I'm reading from a
> > > stream a byte at a time:
> > >
> > > // TERRIBLE
> > > for y in range( height ):
> > > for color in range(4):
> > > for x in range( width ):
> > > pixelComponent = fileIO.read(4)
> > > buffer = unpack("!f",pixelComponent) << unpacks ONE
> > > float, but we now can do something with that pixel component.
> > >
> > >
> > > I can speed this up dramatically if I did this:
> > >
> > > // MUCH FASTER
> > > for y in range( height ):
> > > for color in range(4):
> > > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more
> > > data from the stream into memory FIRST!!
> > > for x in range( width ):
> > > buffer = unpack( ?????? ) <<<< how do I get each float from
> > > the pixelComponent???
> >
> > Just carve of the first four bytes of pixelComponent on each pass
> > through the loop, and unpack that.
> >
> > for x in range(width):
> > fourbytes = pixelComponent[:4] # first 4 bytes
> > pixelComponent = pixelComponent[4:] # All but first four bytes
> > buffer = unpack("!f", fourbytes)
> >
> >
> > There are probably better ways overall, but this directly answers your
> > question.
> >
> > Gary Herron
> >
> >
> > >
> > >
> > > -M
> > > 
> ------------------------------------------------------------------------
> > > With Windows Live for mobile, your contacts travel with you. Connect
> > > on the go.
> > > 
> <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it 
> out! 
> <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From alastair.graham at gmail.com  Mon May 12 15:50:04 2008
From: alastair.graham at gmail.com (JustMe)
Date: Mon, 12 May 2008 12:50:04 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
Message-ID: <f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>

On 12 May, 20:02, Mensanator <mensana... at aol.com> wrote:
> On May 12, 12:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
> > Just something that crosses my mind every time I delve into "Learning
> > Python" each night. Does anyone see any value in learning Python when you
> > don't need to for school, work, or any other reason?

I'm in the same boat. My work seems fixated with .Net but IMHO I think
they would be better off going with Python. Still, who am I to stand
in the way of hundreds of .Net programmers.

However, learning Python in the evening for the hell of it has led me
to investigate Linux, which in turn has made me find out reams more
stuff about computing than I knew before. So I've learnt a new
programming language (albeit at a fairly basic level), installed a new
OS and started looking into setting up home servers. None of it is
spectacular, but it wouldn't have happened if I hadn't just thought
"What the hell, I'll just learn it anyway"


From castironpi at gmail.com  Thu May  8 20:13:08 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:13:08 -0700 (PDT)
Subject: Python Syntax and misspelled variable and method name checker?
References: <mailman.799.1210269536.12834.python-list@python.org> 
	<68gtogF2sujboU1@mid.uni-berlin.de>
Message-ID: <000b6c98-41dc-46c0-97b6-02af5f3a4825@25g2000hsx.googlegroups.com>

On May 8, 1:06?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> neerashish schrieb:
>
>
>
> > Is there a good Python Syntax and mis-spelled variable and method name
> > checker available.
>
> > I have been programming in python for last 6 months and misspelled variables
> > and method names have been bane of my python life.
>
> > In complied languages, compiler checks for these mistakes. I come from Java
> > , C++ background.
>
> > I use komodo as editor on mac. I use python 2.4
>
> > Please suggest some good tool and utilities.
>
> Try pylint, pychecker and the commercial version of pydev.
>
> Diez

Why is it integral to Python?


From cwitts at gmail.com  Wed May 28 05:22:04 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 02:22:04 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <c23adf49-c644-4ae0-8724-d0a2c91fb430@k30g2000hse.googlegroups.com>

On May 28, 11:08?am, dave_140... at hotmail.com wrote:
> Hi,
>
> I have problems getting my Python code to work with UTF-8 encoding
> when reading from stdin / writing to stdout.
>
> Say I have a file, utf8_input, that contains a single character, ?,
> coded as UTF-8:
>
> ? ? ? ? $ hexdump -C utf8_input
> ? ? ? ? 00000000 ?c3 a9
> ? ? ? ? 00000002
>
> If I read this file by opening it in this Python script:
>
> ? ? ? ? $ cat utf8_from_file.py
> ? ? ? ? import codecs
> ? ? ? ? file = codecs.open('utf8_input', encoding='utf-8')
> ? ? ? ? data = file.read()
> ? ? ? ? print "length of data =", len(data)
>
> everything goes well:
>
> ? ? ? ? $ python utf8_from_file.py
> ? ? ? ? length of data = 1
>
> The contents of utf8_input is one character coded as two bytes, so
> UTF-8 decoding is working here.
>
> Now, I would like to do the same with standard input. Of course, this:
>
> ? ? ? ? $ cat utf8_from_stdin.py
> ? ? ? ? import sys
> ? ? ? ? data = sys.stdin.read()
> ? ? ? ? print "length of data =", len(data)
>
> does not work:
>
> ? ? ? ? $ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
> ? ? ? ? length of data = 2
>
> Here, the contents of utf8_input is not interpreted as UTF-8, so
> Python believes there are two separate characters.
>
> The question, then:
> How could one get utf8_from_stdin.py to work properly with UTF-8?
> (And same question for stdout.)
>
> I googled around, and found rather complex stuff (see, for example,http://blog.ianbicking.org/illusive-setdefaultencoding.html), but even
> that didn't work: I still get "length of data = 2" even after
> successively calling sys.setdefaultencoding('utf-8').
>
> -- dave

weird thing is 'c3 a9' is ?? on my side... and copy/pasting the ?
gives me 'e9' with the first script giving a result of zero and second
script gives me 1


From grante at visi.com  Fri May 30 11:57:43 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 30 May 2008 10:57:43 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
	<87skw0s0jj.fsf@physik.rwth-aachen.de>
Message-ID: <8LydnV1nb4Rqvt3VnZ2dnUVZ_gCdnZ2d@posted.visi>

On 2008-05-30, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
> Duncan Booth writes:
>
>> [...]
>>
>> I don't understand your problem: it's just a single thread so
>> killfile or skip it.
>
> Although I agree with you that there is no problem, *this* is not a
> good justification for this thread.  One should stay on topic in
> *every* thread.

I've noticed that a lot of things that should be, aren't.

The percentage of off-topic threads in c.l.p is extraordinarily
low by normal Usenet standards.  One oughtn't complain about it
lest one jinx things and reduce c.l.p to the state of the rest
of Usenet. 

I wouldn't even consider the thread all that OT, but maybe
that's just me.

-- 
Grant Edwards                   grante             Yow! !  Everybody out of
                                  at               the GENETIC POOL!
                               visi.com            


From arnodel at googlemail.com  Thu May 15 02:17:19 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 07:17:19 +0100
Subject: Passing functions around and executing
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
	<db5e55ac-5e91-40c8-8bdb-e573436a986c@l17g2000pri.googlegroups.com>
Message-ID: <m2fxsk9jm8.fsf@googlemail.com>

alex23 <wuwei23 at gmail.com> writes:

> On May 15, 10:53 am, PatrickMinnesota <PatrickMinnes... at gmail.com>
> wrote:
>> I have a bunch of functions.  I want to put them in a list.  Then I
>> want to pass that list into another function which does some setup and
>> then loops through the list of passed in functions and executes them.
>> Some of them need arguments passed in too.
>
> Hey Patrick,
>
> Is something like the following helpful?
>
>>>> def fn1(): print 'fn1'
>>>> def fn2(): print 'fn2'
>>>> fn_list = [fn1, fn2]
>>>> def process(fn_seq):
> ...     # do set up here
> ...     for fn in fn_list:
> ...         fn()
>
>>>> process(fn_list)
> fn1
> fn2
>
> The easiest way to extend this for optional argument passing would be
> to have each function accept keyword arguments, and then to pass a
> dictionary of arguments in to each:
>
Or you could wrap your functions in functools.partial:

def foo(n):
    return 'x'*n

>>> from functools import partial
>>> foo10 = partial(foo, 10)
>>> print foo10()
xxxxxxxxxx

HTH

-- 
Arnaud


From darcy at druid.net  Fri May 16 11:42:57 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 11:42:57 -0400
Subject: writing python extensions in assembly
In-Reply-To: <wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
Message-ID: <20080516114257.b56d718e.darcy@druid.net>

On Fri, 16 May 2008 11:21:39 -0400
"inhahe" <inhahe at gmail.com> wrote:
> You could be right, but here are my reasons.
> 
> I need to make something that's very CPU-intensive and as fast as possible. 
> The faster, the better, and if it's not fast enough it won't even work.
> 
> They say that the C++ optimizer can usually optimize better than a person 
> coding in assembler by hand can, but I just can't believe that, at least for 
> me, because when I code in assembler, I feel like I can see the best way to 
> do it and I just can't imagine AI would even be smart enough to do it that 
> way...

Perhaps.  Conventional wisdom says that you shouldn't optimize until
you need to though.  That's one of the benefits of the way Python
works.  Here's how I would do it.

1. Write the code (call it a prototype) in pure Python.  Make sure that
everything is modularized based on functionality.  Try to get it split
into nice, bite size chunks.  Make sure that you have unit tests for
everything that you write.

2. Once the code is functioning, benchmark it and find the
bottlenecks.  Replace the problem methods with a C extension.  Refactor
(and check your unit tests again) if needed to break out the problem
areas into as small a piece as possible.

3.  If it is still slow, embed some assembler where it is slowing down.

One advantage of this is that you always know if your optimizations are
useful.  You may be surprised to find that you hardly ever need to go
beyond step 1 leaving you with the most portable and easily maintained
code that you can have.

> For portability, I'd simply write different asm routines for different 
> systems.  How wide a variety of systems I'd support I don't know.  As a bare 
> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms of 
> SIMD.

Even on the same processor you may have different assemblers depending
on the OS.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From tjreedy at udel.edu  Wed May 21 15:48:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 15:48:58 -0400
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
	<48344323.1040401@islandtraining.com>
Message-ID: <g11ub7$pb9$1@ger.gmane.org>


"Gary Herron" <gherron at islandtraining.com> wrote in message 
news:48344323.1040401 at islandtraining.com...
| mh at pixar.com wrote:
| > I want to iterate over members of a module, something like:
| >
| >     for i in dir(x):
| >         if type(i) == types.FunctionType: ...
| >
| > but of course dir() returns a list of strings.  If x is a module,
| > how can I get the list of its members as their actual types?
| >
| > Many TIA!
| > Mark
| >
| >
| Use the builtin vars to get a dictionary of names and associated objects.
|
| import sys
| for name,ob in vars(sys).items():
|  print name,type(ob)

This also works on classes, but apparently not on most other objects. 





From lists at cheimes.de  Wed May  7 17:31:19 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 23:31:19 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>	<mailman.723.1210193322.12834.python-list@python.org>
	<27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>
Message-ID: <fvt737$4js$1@ger.gmane.org>

grayaii schrieb:
> Awesome! That worked!
> And your comment just led me down another exploration path on why the
> following doesn't work:
> ---------------------
> while(returncode is None):
> 	returncode = run.poll()
> 	time.sleep(1)
> 
> out = run.stdout.readlines()
> err = run.stderr.readlines()
> ---------------------
> Nowhere in the loop am I reading stdout or err.
> I'm only reading it after the loop has finished, and when running the
> exe, returncode is *always* None.
> Now I have to figure out a way to read it within the loop without
> blocking the read... on Windows...

the subprocess has already a canonical way:

out, err = run.communicate()

Your code may still block if the stderr buffer is full during the
stdout.readlines() call.

Christian



From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:04:23 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:04:23 +0200
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <482c42d9$0$9669$426a34cc@news.free.fr>

castironpi a ?crit :
> Why can't I write this?

Because one or more of the "t", "h", "i", "s" keys are missing from your 
keyboard ?


From nishant.deshpande at gmail.com  Mon May  5 22:27:03 2008
From: nishant.deshpande at gmail.com (nishant.deshpande at gmail.com)
Date: Mon, 5 May 2008 19:27:03 -0700 (PDT)
Subject: notification of file truncate
Message-ID: <f37948f6-45af-41f7-a6d1-cfbf8b81e3b8@l17g2000pri.googlegroups.com>

hi,

I am running ubuntu 7.1 (linux 2.6.22-12-generic)

i was trying to implement 'tail -f' (well tail -F actually but for
this example i think its not relevent) and one of the features which i
couldn't get in python was notification of truncation of a file.

i looked at the inotify (the pyinotify package) and then the linux
inotify functionality.

i don't see the truncation notification anywhere... yet tail -F
notifies that the file has been truncated and repositions its offset
at top of the file to print out the next lines.

can anyone shed some light on this? i guess i need to look at the bash
tail code..







From NikitaTheSpider at gmail.com  Mon May 19 10:59:20 2008
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Mon, 19 May 2008 10:59:20 -0400
Subject: is there a bug in urlunparse/urlunsplit
References: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>
Message-ID: <NikitaTheSpider-9134B1.10592019052008@johnf2.biosci.ohio-state.edu>

In article 
<09764c57-03ce-4ccb-a26d-e851899dcc7c at a23g2000hsc.googlegroups.com>,
 Alex <metallourlante at gmail.com> wrote:

> Hi all.
> 
> Is there a bug in the urlunparse/urlunsplit functions?
> Look at this fragment (I know is quite silly):
> 
> urlunparse(urlparse('www.example.org','http'))
> ---> 'http:///www.example.org'
>            ^^^^^
> 
> There are too many slashes, isn't it? Is it a known bug or maybe I
> missed something...

Hi Alex,
For a few years now I've been using Fourthought's libraries for parsing 
URLs and they've performed beautifully. In the code comments, they state 
that urlparse() and friends exhibit some non-RFCish behavior, hence the 
inspiration for writing their own libraries. 

If I remember correctly, the file you want is uri.py and it is in 4Suite 
which you can download from here:
http://www.fourthought.com/

HTH

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From cokofreedom at gmail.com  Thu May 29 08:41:11 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 29 May 2008 05:41:11 -0700 (PDT)
Subject: Tuple of coordinates
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <f66bb609-94fd-4f39-a7fa-f24364abddcc@m45g2000hsb.googlegroups.com>

a = 1, 2
b = 3, 4, 5
c = 6, 7, 8, 9
coord = list()

for i, j, k in zip(a, b, c):
    coord.append((i, j, k))

print coord


From aboudouvas at panafonet.gr  Mon May 12 17:24:59 2008
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 12 May 2008 14:24:59 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
	<f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>
Message-ID: <b8fbefab-e21f-4568-8acd-c5863ea4b156@34g2000hsh.googlegroups.com>

Same for me here too! C# on the work, Python earning at the evening. I
am bored to death with so many .net/C# years and i wanted to learn
something different and cross platform. I think it will pay back some
time...

On May 12, 10:50 pm, JustMe <alastair.gra... at gmail.com> wrote:
> On 12 May, 20:02, Mensanator <mensana... at aol.com> wrote:
>
> I'm in the same boat. My work seems fixated with .Net but IMHO I think
> they would be better off going with Python. Still, who am I to stand
> in the way of hundreds of .Net programmers.
>
> However, learning Python in the evening for the hell of it has led me
> to investigate Linux, which in turn has made me find out reams more
> stuff about computing than I knew before. So I've learnt a new
> programming language (albeit at a fairly basic level), installed a new
> OS and started looking into setting up home servers. None of it is
> spectacular, but it wouldn't have happened if I hadn't just thought
> "What the hell, I'll just learn it anyway"



From umpsumps at gmail.com  Wed May  7 12:39:50 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Wed, 7 May 2008 09:39:50 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
Message-ID: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>

Hello,

Here is my code for a letter frequency counter.  It seems bloated to
me and any suggestions of what would be a better way (keep in my mind
I'm a beginner) would be greatly appreciated..

def valsort(x):
	res = []
	for key, value in x.items():
		res.append((value, key))
	return res

def mostfreq(strng):
	dic = {}
	for letter in strng:
		if letter not in dic:
			dic.setdefault(letter, 1)
		else:
			dic[letter] += 1
	newd = dic.items()
	getvals = valsort(newd)
	getvals.sort()
	length = len(getvals)
	return getvals[length - 3 : length]

thanks much!!


From victorsubervi at gmail.com  Tue May 13 14:10:21 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Tue, 13 May 2008 22:40:21 +0430
Subject: Custom Classes?
In-Reply-To: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>

I remember why I had the number with the getpic. It is because I display
several of these images on a single page, and apparently I cannot call the
same script and get more than one image from an HTML page.
Victor

On Fri, May 9, 2008 at 10:26 AM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> Okay, trying this again with everything working and no ValueError or any
> > other errors, here we go:
> >
>
>  getpic = "getpic" + str(w) + ".py"
> >
>
> Why do you *generate* the getpicNN.py? It contains always the same code,
> why don't you just use a single getpic.py?
>
> and then surf to:
> > http://whatever.url/getpic20.py?id=6&x=1
> >
>
> Why don't you post the error you get instead...? Including the complete
> exception report.
>
> Also, please re-send the link on how to post good questions to the list. I
> > cannot find it.
> >
>
> Uhm, I don't think there is something specific for this list. There is an
> article from E.S.Raymond "How to ask questions the smart way?" that you can
> find with Google
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From wdraxinger at darkstargames.de  Fri May 16 06:44:26 2008
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Fri, 16 May 2008 12:44:26 +0200
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <c550g5-l5f.ln1@darkstargames.dnsalias.net>

Mike Driscoll wrote:

> Hi,
> 
> I've had this niggling issue from time to time. I want to
> create a shortcut on the user's desktop to a website that
> specifically loads Firefox even if Firefox is not the default
> browser.
> 
> I usually use COM as it allows very specific settings of the
> shortcut, such as the Working Directory and the Target Path.
> However, the following will not work for some reason:
> 
> <code>
> 
> import win32com.client
> import winshell
> 
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
> 
> shortcut = shell.CreateShortCut(userDesktop +
> '\\MyShortcut.lnk') shortcut.Targetpath = r'"C:\Program
> Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> shortcut.save()
> 
> </code>
> 
> This creates the following target path (which doesn't work):
> 
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
> 
> If I leave the website off, it works. If I leave the path to
> Firefox out, it works too. Is there another method I can use
> other than creating the shortcut by hand and using the shutil
> module?
> 
> Thank you for any ideas.

I see four problems:

1) you should not hardcode the backslashes ('\'), instead use
os.sep for it.

2) In URIs there are no backslashes, only forward slashes. You
coded

https:\...

which is _WRONG_. URIs are <protocoll>://<host>/<resource>, where
for some protocolls <host> is empty (file protocoll e.g.).

3) You assume, that Firefox is always installed at C:\Program
Files\Mozilla Firefox\firefox.exe
However the path largely differs from system to system. On *nix
systems you normally have all programs in $PATH, so a non full
qualified path would be sufficient. On Windows this works, too,
_IF_ the installation directory of the to be used application
get's added to the PATH environment variable.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867



From gagsl-py2 at yahoo.com.ar  Mon May  5 01:40:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:40:56 -0300
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
Message-ID: <op.uan12ie9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:33:12 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> i'm redirecting the stdout & stderr of my python program to a log.
> Tests i've done on a simple program with print statements, etc. work
> fine.  however, in my actual program i get weird output like this:
>
> 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> if any
> 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
> from queue, if any
> 2008-05-04 20:20:44,790 DEBUG
> DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any
>
>
> class write2Log:
> 	def write(self, x):
> 		if x!='\n':
> 			logger.debug(str(x))
>
> any ideas what might be causing the problems?  some of the messages
> being output are quite long - might this be a problem?

Try this simplified example and see by yourself:

import sys

class Write2Log:
     def write(self, x):
         sys.__stdout__.write('[%s]' % x)

sys.stdout = Write2Log()

print "Hello world!"
age = 27
name = "John"
print "My name is", name, "and I am", age, "years old."

-- 
Gabriel Genellina



From cobrocks at msn.com  Wed May 28 06:25:01 2008
From: cobrocks at msn.com (James)
Date: Wed, 28 May 2008 10:25:01 -0000
Subject: A quick question
Message-ID: <g1jbtt+bf6m@eGroups.com>

Hey everyone,

I just started using python and cant figure this out, I'm trying to 
make a program where someone types in a word and the program gives it 
back backwards.  For example if the person puts in "cat" I want the 
program to give it back as "tac" and what it does is prints out 3,2,1.  
How can I get these integers to print as letters?  This is what I have,

word = raw_input("Type a word:")
start = len(word)

for letter in range(start, 0, -1):
    print letter  




From martin.laloux at gmail.com  Sun May 25 05:09:28 2008
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: Sun, 25 May 2008 02:09:28 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
	<21fce204-a3d5-4252-b1e2-91a3fae13649@w8g2000prd.googlegroups.com>
Message-ID: <35275a85-221f-4f09-bea9-ad03cbbea6f0@m45g2000hsb.googlegroups.com>

you put your pth file in (same configuration:

/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/


From ptmcg at austin.rr.com  Wed May 21 11:23:45 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 21 May 2008 08:23:45 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
Message-ID: <4361519a-6a1c-4813-9300-5b1c9482628b@y38g2000hsy.googlegroups.com>

On May 21, 9:09?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> cokofree... at gmail.com wrote:
>
> >> And wastes time. regular expressions can become expensive to match -
> >> doing it twice might be hurtful.
>
> >> Diez
>
> > match = (my_re1.match(line) or my_re2.match(line)) or
> > my_re3.match(line)
>
> How do you know *which* of the three has matched then?
>
> Diez

Since the OP is processing alternative regexp's, he may be drifting
close to parsing territory.  Here is a pyparsing example showing how
to match one of 'n' alternatives, and then apply functional logic
depending on which expression was matched.  This example actually
shows 4 ways to address this question (in roughly increasing order of
OO-ness):
- explicit if/elif/... test on the name of the specific match to see
which alternative matched
- more Pythonic dispatch using a dict of names and corresponding
expression processing functions
- parse-time processing using pyparsing parse actions
- parse actions invoke class constructors, to return expression-
specific objects

-- Paul


from pyparsing import oneOf, Combine, Optional, Word, \
    alphas, nums, alphanums, QuotedString

# define basic expressions
sign = oneOf("+ -")
integer = Combine(Optional(sign) + Word(nums))
real = Combine(Optional(sign) + Word(nums) + "." +
Optional(Word(nums)))
name = Word(alphas,alphanums) | QuotedString("'")

# define alternates with results names
item = real("real") | integer("integer") | name("name")

print "\nUse results names to determine which pattern matched"
for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    if it.getName() == "real":
        print "Real:", (float(it[0]))
    elif it.getName() == "integer":
        print "Int:", (int(it[0]))
    else:
        print "String:", it[0]


print "\nUse dict to dispatch to type-specific functions " \
       "- more Pythonically canonical"
def processRealItem(it):
    print "Real:", (float(it[0]))

def processIntegerItem(it):
    print "Int:", (int(it[0]))

def processNameItem(it):
    print "String:", it[0]

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    {"real"    : processRealItem,
     "integer" : processIntegerItem,
     "name"    : processNameItem }[it.getName()](it)


print "\nMove expression-specific logic into parse-time parse actions"
def convertInt(t):
    return int(t[0])
def convertReal(t):
    return float(t[0])
integer.setParseAction(convertInt)
real.setParseAction(convertReal)
item = real("real") | integer("integer") | name("name")

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    print "%s: %s %s" % (it.getName(), it[0], type(it[0]))


print "\nUse class constructors as parse-time parse actions " \
      "- results names no longer needed"
class IntObject(object):
    def __init__(self,t):
        self.type, self.value = "Int", int(t[0])
class RealObject(object):
    def __init__(self,t):
        self.type, self.value = "Real", float(t[0])
class StringObject(object):
    def __init__(self,t):
        self.type, self.value = "String", t[0]
integer.setParseAction(IntObject)
real.setParseAction(RealObject)
name.setParseAction(StringObject)
item = real | integer | name

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    print "%s: %s (%s)" % (it[0].type, it[0].value,
it[0].__class__.__name__)


Prints:

Use results names to determine which pattern matched
String: abc
Int: 123
Real: -3.14
String: phase of the moon

Use dict to dispatch to type-specific functions - more Pythonically
canonical
String: abc
Int: 123
Real: -3.14
String: phase of the moon

Move expression-specific logic into parse-time parse actions
name: abc <type 'str'>
integer: 123 <type 'int'>
real: -3.14 <type 'float'>
name: phase of the moon <type 'str'>

Use class constructors as parse-time parse actions - results names no
longer needed
String: abc (StringObject)
Int: 123 (IntObject)
Real: -3.14 (RealObject)
String: phase of the moon (StringObject)



From celoserpa at gmail.com  Thu May 15 21:50:21 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 22:50:21 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <1e5bcefd0805151850r899c923m3da14c089973beab@mail.gmail.com>

Hmm.. I re-read your message and I think I'm approaching testing in a
mechanical way, indeed.

You're right, my test is kind of pointless, given the objective of the
function, which is to generate a differnt directory name each time it is
called. I also found it kind of strange to repeat the implementation in the
test method. However, something keeps telling me that it still has to be
"unit" tested, sonehow (the algorith used).

Thanks,

Marcelo.

On Thu, May 15, 2008 at 9:54 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 15 May 2008 14:21:34 -0300, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> escribi?:
>
>  So, I have this particular method, generate_chat_dir_string, which should
>> generate a string in the following format:
>>  "md5hexstring-day-month-year-hour-minute"
>> This string will be used to create a directory in the filesystem.
>>
>
> There is an issue here - how much behavior is considered in the public
> interfase, and how much is just an implementation detail. You only have to
> test the public interfase, what the method promises to do, NOT any internal
> implementation details.
>
> I don't think that the md5 string be part of the interfase - probably it's
> enough to promise different directory names for different combinations of
> "user" and "atendente". A separate question: do we promise to generate the
> same directory name for the same set of user/atendente, or not? (assuming
> the time part is constant).
> For the time part - is that format *required*, or just a means to obtain
> separate directory names, even for the same set of users, based on time?
> Or perhaps we *only* want to guarantee different results for different
> function calls, and ALL that stuff involving users and time are just
> implementation details?
> Depending on how you answer those questions, you write tests in a way or
> another way.
>
>  I'm trying to adopt the TDD approach, so, I'm starting by testing all the
>> methods of the Chat class, including this one. However, an issue just
>> popped
>> up, this is the test code:
>>
>>
>>   1.   def test_generate_chat_dir_string(self):
>>   2.         import md5
>>   3.         import random
>>   4.         import datetime
>>   5.         md5_handler = md5.new()
>>   6.         users = [{"user":"pedro","atendente":False},{
>>   "user":"jo?o","atendente":True}]
>>   7.         #salt = random.random().to_s()
>>   8.         #md5_handler.update(salt)
>>   9.         now = datetime.datetime.now()
>>   10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>>   11.         for user in users:
>>   12.             md5_handler.update(user["user"])
>>   13.
>>   14.
>>   15.         seed = md5_handler.hexdigest()
>>   16.
>>   17.         final_string = seed + "-" + ts
>>   18.
>>   19.         method_generated_string =
>> self.chat.generated_chat_dir_string
>>   (users,seed)
>>   20.
>>   21.         self.assertEquals(final_string,method_generated_string)
>>
>
> Looks like you have just copied the generated_chat_dir_string
> implementation here - that's not the point of testing, at least if you relax
> the restrictions as I said above.
>
> Supose the specification says, instead: the resulting directory must differ
> whether the set of users/atendente differs, or the request time is separated
> more than 1 minute apart.
>
> Then the tests should cover:
> - build a set of users and choose a point in time
> - generate dir1 with that set of users and that time
> - modify the set of users, generate dir2 and assert that it differs from
> dir1
>  Repeat other modifications, including:
>    one more user
>    one less user
>    same users, changing "atendente" for some
>    only one user
>    empty set of users (if it should raise an exception, check that it's
> actually raised)
>    what happens when only the *order* of users is changed? (why is it a
> list instead of a set?)
>    other conditions that might fail, perhaps based on your knowledge of the
> implementation (it's ok to test special cases that are special only because
> of how it is implemented, as far as you only test what is required by the
> specification). By example, suppose the md5 function is absolutely dumb and
> only accepts strings at most 32 characters long; test with a username longer
> than that.
>
> - Then, increment the time less than a minute and verify you *can* generate
> dir3 (our specification doesn't *require* it to be the same, so don't check
> more than required)
> - increment the time more than a minute, generate another dir and verify
> it's different.
>
> Notice that, to be able to make all those tests involving the *same* time
> we should process them very quickly so the minute part doesn't change (but
> it even might fail when we're near the minute end). Worse, the last test
> woul require to *wait* more than one minute to see the change...
> That's horrible - so we write the function in a way that *helps* testing.
> By example, adding another argument: the time to be used, which defaults to
> None meaning the current time.
>
> def generated_chat_dir_string(self, users, curtime=None):
>    if curtime is None: curtime = time.time()
>    ...
>
> (usually curtime is unused, but we do use it for testing)
>
> I hope it's more clear now how to define your tests.
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From inhahe at gmail.com  Fri May 16 10:13:04 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:13:04 -0400
Subject: writing python extensions in assembly
Message-ID: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>

Can anyone give me pointers/instructions/a template for writing a Python 
extension in assembly (or better, HLA)?




From jwashin at vt.edu  Tue May  6 11:05:16 2008
From: jwashin at vt.edu (Jim Washington)
Date: Tue, 06 May 2008 11:05:16 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <482073AC.1000901@vt.edu>

jmDesktop wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.
> --
> http://mail.python.org/mailman/listinfo/python-list

Others have commented that interfaces are not normally important in Python.

However, if you want to do something *with* interfaces like declaring
that an object or class implements a particular interface, or querying
the interfaces implemented by an object, you might look at
zope.interface.  Although it is used by and created for Zope,
zope.interface is packaged to be installable and usable outside of zope.
 It's available at the Cheese Shop.

If you want to do adaptation from one interface to another or, for
example, register and look-up utilities by interface, zope.component is
also handy.

- Jim Washington


From grg2 at comcast.net  Tue May 20 11:15:32 2008
From: grg2 at comcast.net (A_H)
Date: Tue, 20 May 2008 08:15:32 -0700 (PDT)
Subject: Help with character encodings
Message-ID: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>

Help!

I've scraped a PDF file for text and all the minus signs come back as
u'\xad'.

Is there any easy way I can change them all to plain old ASCII '-' ???

str.replace complained about a missing codec.



Hints?






From exarkun at divmod.com  Mon May 12 15:06:31 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 15:06:31 -0400
Subject: Socket and cycle problem
In-Reply-To: <ef31cd3f-21ce-4dd0-b38e-e888d2c14ac6@z72g2000hsb.googlegroups.com>
Message-ID: <20080512190631.6859.1214063498.divmod.quotient.62582@ohm>

On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.poupa at gmail.com wrote:
> [snip]
>
>My script send me via 3883 port (VRPN) data, but only once. I need
>listening this port countinously.
>So I need  make some loop to print data from 3883 port permanent.
>Data that I recevied looks liek this:
>
>receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'

I'm not sure if you need to write a server or a client.  In your
original code, you had a client which repeatedly established out-
bound connections.  Here, you say you need to listen on a port.

>
>Do you think its necessary to use Twisted? Do you have any ideas how
>to do it with socket modul?

The basic version is pretty easy either way.  However, with Twisted,
you get cross-platform error handling without any extra effort, and
you don't have to think about the boring low-level details of BSD
sockets.

Here's a Twisted server that listens on port 3883 forever and prints
the data it receives from each connection after the remote side drops
the connection:

    from twisted.internet import reactor
    from twisted.internet.protocol import ServerFactory, Protocol

    class PrintingProtocol(Protocol):
        def connectionMade(self):
            """
            When the connection is first established, create a list
            into which to buffer all received data.
            """
            self.received = []

        def dataReceived(self, data):
            """
            Whenever any data is received on this connection, add it
            to the buffer.
            """
            self.received.append(data)

        def connectionLost(self, reason):
            """
            When the connection is lost, print out the contents of
            the receive buffer.
            """
            print repr("".join(self.received))

    # Create a factory which will use our protocol to handle incoming
    # connections.
    factory = ServerFactory()
    factory.protocol = PrintingProtocol

    # Listen with it on port 3883
    reactor.listenTCP(3883, factory)

    # Start the reactor.  Nothing in this program will ever stop the
    # reactor, so it will run and accept connections forever.
    reactor.run()

If you were to use the socket module, then it would look something like this:

    from socket import socket
    from errno import EINTR

    port = socket()
    port.bind(('', 3883))
    port.listen(5)
    while True:
        try:
            server, clientAddr = port.accept()
        except socket.error, e:
            print "Error accepting client connection", e
        else:
            received = []
            while True:
                try:
                    bytes = server.recv(1024 * 16)
                except socket.error, e:
                    if e.errno == EINTR:
                        continue
                    else:
                        break
                if not bytes:
                    break
                received.append(bytes)
            print repr("".join(received))

Hope this helps,

Jean-Paul


From dullrich at sprynet.com  Sun May 18 10:06:29 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 18 May 2008 09:06:29 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
Message-ID: <dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>

On Sun, 18 May 2008 08:50:23 +0200, pataphor <pataphor at gmail.com>
wrote:

>In article <hjlt245hnhrle11khpupg6fppr000f8f51 at 4ax.com>, 
>dullrich at sprynet.com says...
>
>> >>   window.pos = (x,y)
>> >>
>> >> seems more natural than
>> >>
>> >>   window.SetPos(x,y);
>
>Yes, and to assign a row in a matrix I'd also like to use either tuples 
>or lists on the right side. 

Heh - in the current (flawed) implementation you can
say m.row[0] = 'Hello'; m.row[1]= 'World!' .Not that I see why 
you'd want to, but that happened in the test code just to
check that things were as general as I wanted - sure enough
m.row[0] + m.row[1] comes out to ['HW', 'eo', 'lr', ''ld', 'o!'].

>>   def __add__(self, other):
>>     return Row([x + y for x, y in zip(self, other)])
>> 
>> worked as hoped if self is a Row and other is a
>> Row _or_ a list.)
>> 
>> Anyway, my m.rows[j] can't be a list, because
>> I want to be able to say things like
>> m.rows[0] += c*m.rows[2]. Allowing 
>> m.rows[j] = [1,2,3] seems convenient, while
>> requiring m.rows[j] = Row([1,2,3]) fixes
>> this problem. Hmm.
>
>I'm not sure how far you'd go along with Gabriel's idea of decoupling 
>views from data but I think there isn't even a need for using a matrix 
>as the underlying data type. Why not use a flat list and compute matrix 
>positions according to a row or column adressing scheme on the fly? 

Is there some reason that would be better? It would make a lot
of the code more complicated. Ok, it would require only one
bit of added code, I suppose, but I don't see the plus side.

Hmm. It might actually _reduce_ the total amount of code,
since the code to access columns has to exist anyway and
rows could use the same code as columns with different
"start" and "skip". And come to think of it rows and
columns could be obtained just with a slice of the data.
So column access might even be more efficient. But I
expect that row access will happen a lot more often
than column access.

>P.

David C. Ullrich


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:45:06 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:45:06 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
Message-ID: <0f2f9774-e78e-44e4-bd0b-07daaa9f98f8@k1g2000prb.googlegroups.com>

On May 3, 12:16 pm, smitty1e <smitt... at gmail.com> wrote:
> Just a fun exercise to unify some of the major input methods for a
> script into a single dictionary.
> Here is the output, given a gr.conf file in the same directory with
> the contents stated below:
>


How about extending this to include other sources of control inputs.
I think a reasonable heirarchy is:

Interactive Input
 > Command Line Argument
  > Command Line Input File
   > Environment Variables
    > Local Defaults File
     > System Wide Defaults File
      > Installation Defaults File
       > 'Factory' Defaults File
        > In-Code Initialization Defaults


From roy at panix.com  Mon May 19 20:58:39 2008
From: roy at panix.com (Roy Smith)
Date: Mon, 19 May 2008 20:58:39 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
Message-ID: <roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>

In article <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks for the feedback.
> 
> Using the socket in a list is great
> 
> However, as i imagined, I now get a limit of around 1500 conns before the 
> system crashes out, also i have noticed, that the ports loop back to 1025 
> when they hit 5000.
> 
> Any ideas on how to make the list/socket get to around 50K

Yikes.  Not on any box I know of.  A given process is limited in how many 
descriptors it can have open at once.  I don't know of any that will allow 
anywhere near 50k.  Somewhere in the 1-2000 range would be more typical.  
The 1500 you report is not at all surprising.

You might try creating a bunch of child processes with os.system() or 
something of that ilk.  Create 50 processes and have each one open 1000 
sockets.

The next thing you have to worry about is whether the OS can handle 50k 
file descriptors open per-system.  Or 50k sockets, or TCP connections.  I 
wouldn't be too surprised if many systems couldn't.  The address space (TCP 
port numbers) is 16-bit (unsigned), or about 65k, but you may well run into 
some other system limit long before you exhaust the theoretically available 
ports.

Something like Scapy, recommended by others, may indeed be able to generate 
all those SYN packets you want, but that doesn't mean you'll get all the 
open connections you seek.  You send a SYN packet to the remote host, and 
it sends back a SYN/ACK.  The local kernel now sees a SYN/ACK packet for a 
port it doesn't know about.  I'm not sure what the RFCs say about that, but 
I wouldn't be surprised if the kernel ends up sending a RST or maybe a FIN 
or something like that.  The kernel owns the ports; it's not nice to try 
and mess with them on your own.


From jhenRemoveThis at talk21.com  Fri May 30 22:04:14 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sat, 31 May 2008 12:04:14 +1000
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
Message-ID: <6abq0uF36n019U1@mid.individual.net>

globalrev wrote:

> can i send and receive messages from a website using python?

Absolutely.  But I'm not clear what you mean by "from a
website".  Do you mean to use SMPP protocol to lodge and
receive messages?  Or do you want access to your own cellular
hardware from a web interface?

> how would that work with costs? would the mobileowner pay both
> ways?

That depends on the country, the carrier and the offers/plans
that carrier makes.  In most of the civilized world, SMS
receivers pay nothing.

John


From kirk at daycos.com  Fri May 30 16:04:52 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 15:04:52 -0500
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <87skvzlfrv.fsf@internal.daycos.com>

At 2008-05-30T19:50:43Z, Cameron <cameronlarue at gmail.com> writes:

> Why does that work, but not this:
>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar

Assume that n is an int, making s one also.  Ints are immutable; you can
only copy them.  So your bar is taking s, adding i to it, then assigning the
value back to the local variable named s.
-- 
Kirk Strauser
The Day Companies


From marlin_rowley at hotmail.com  Fri May 16 20:22:38 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 19:22:38 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482E21F4.1090809@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
Message-ID: <BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>

 
Very cool.
 
> > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
a represents a tile with height of 2 and width of 4 with 4 bits/pixel for each color.
 
> >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
this seperates the stream into individual values - Check
 
> >>> b.shape=(2,4,4)
This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check
 
 >>> c = b.transpose((2,0,1))
 
What does the (2,0,1) represent in terms of width and height and number of bytes?
 



> Date: Fri, 16 May 2008 17:08:20 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com; python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > All:> > > > Say I have an array:> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > How do I make it so that I now have:> > > > starting with first element (a[0])> > new_arr[0] = 'r'> > new_arr[1] = 'g'> > new_arr[2] = 'b'> > new_arr[3] = 'a'> > new_arr[4] = 'r'> > .....> > > > continuing "through" a[1] with the same new_arr> > new_arr[N] = 'r'> > new_arr[N+1] = 'g'> > ....> > > > -M> > Numpy can do this for you. First, do you really mean the array to > contain lists of one string each? If so:> > >>> import numpy> >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a > kludge here> >>> b> array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',> 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> 'b', 'b', 'a', 'a', 'a', 'a'],> dtype='|S1')> >>> b.shape=(2,4,4)> >>> b> array([[['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b'],> ['a', 'a', 'a', 'a']],> > [['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b'],> ['a', 'a', 'a', 'a']]],> dtype='|S1')> >>> c = b.transpose((2,0,1))> >>> c> array([[['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']]],> dtype='|S1')> >>> d=c.copy() # To make it contiguous> >>> d.shape = (32,)> >>> d> array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',> 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> 'b', 'a', 'r', 'g', 'b', 'a'],> dtype='|S1')> > Done. Cool no?> > Gary Herron> > >> >> >> >> > ------------------------------------------------------------------------> > From: marlin_rowley at hotmail.com> > To: robert.kern at gmail.com; python-list at python.org> > Subject: RE: numpy.frombuffer != unpack() ??> > Date: Fri, 16 May 2008 17:31:30 -0500> >> > Thank you! That solved it!> > > > -M> >> >> > ------------------------------------------------------------------------> >> > > To: python-list at python.org> > > From: robert.kern at gmail.com> > > Subject: Re: numpy.frombuffer != unpack() ??> > > Date: Fri, 16 May 2008 17:25:00 -0500> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > I'm getting different floating point values when I use numpy> > vs. unpack().> > > >> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > buffer = unpack("!f", byte)> > > >> > > > frgba[0] != buffer[0]> > > >> > > > why? This is forcing me use the unpack() function since it's> > giving me> > > > the correct values. What am I doing wrong?> > >> > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > '>'). Most> > > likely, you are on a little-endian platform. All of the dtypes> > in numpy default> > > to the native-endianness unless specified. If you want to read> > big-endian data> > > using numpy, do this:> > >> > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > >> > > If you have any more problems with numpy, please join us on the> > numpy mailing> > > list. When reporting problems, please try to provide a small but> > complete> > > snippet of self-contained code, the output that you got, and> > explain the output> > > that you expected to get. Thank you.> > >> > > http://www.scipy.org/Mailing_Lists> > >> > > --> > > Robert Kern> > >> > > "I have come to believe that the whole world is an enigma, a> > harmless enigma> > > that is made terrible by our own mad attempt to interpret it as> > though it had> > > an underlying truth."> > > -- Umberto Eco> > >> > > --> > > http://mail.python.org/mailman/listinfo/python-list> >> >> > ------------------------------------------------------------------------> > E-mail for the greater good. Join the i?m Initiative from> > Microsoft.> > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> >> >> >> > ------------------------------------------------------------------------> > E-mail for the greater good. Join the i?m Initiative from Microsoft. > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From hat at se-162.se.wtb.tue.nl  Thu May  8 06:35:54 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 08 May 2008 12:35:54 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <slrng25lsa.nlv.hat@se-162.se.wtb.tue.nl>

On 2008-05-08, Raxit at MyKavita.com <raxitsheth2000 at gmail.com> wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?

Yes, and all programs that people write typically look like the hello world
program.
Look at some real-world programs for a comparison, for example the Python
Cookbook: http://aspn.activestate.com/ASPN/Cookbook/Python/

> what can i do easily with python which is not easy in c++/java !?

- be productive in programming, rather than hassling with declaring all kind of
  stuff first.

- skip compile step.

On the other hand, if you typically write hello world programs, don't bother.
You won't see the difference.

Sincerely,
Albert


From ewertman at gmail.com  Wed May 28 17:00:44 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 28 May 2008 17:00:44 -0400
Subject: php vs python
In-Reply-To: <7xr6bm2on9.fsf@ruckus.brouhaha.com>
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru> <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
	<7xr6bm2on9.fsf@ruckus.brouhaha.com>
Message-ID: <92da89760805281400u2c2df315t608a75509fbcb948@mail.gmail.com>

Flaming Thunder is teh awesome! :P


From castironpi at gmail.com  Fri May 16 09:18:22 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:18:22 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
Message-ID: <c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>

On May 16, 7:23?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Kay Schluehr a ?crit :
>
>
>
>
>
> > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> >> Hello all,
>
> >> Yesterday we found the cause of a bug that has caused problems for a long time.
> >> It appeared to be the following:
>
> >> class A(object):
> >> ? ? pass
>
> >> print min(1.0, A())
>
> >> which is accepted by Python even though the A() object is not numerical in
> >> nature.
>
> >> The cause of this behavior seems to be the compare operation of the object
> >> class.
>
> >> Is there a way to disable this behavior in Python (other than deriving a new
> >> 'object-like' class that doesn't do comparisons?)
>
> > Are you sure you don't want to use a statically typed language that
> > captures all type errors just by inspecting your source code?
>
> This is not necessarily a static vs dynamic typing problem. The
> following code will raise a TypeError for very good reasons:
>
> ? ? print 1.0 + A()- Hide quoted text -
>
> - Show quoted text -

I question the real-world examples of coercion, casting, and
upcasting.  C insists that defining by operator, which may or may not
relate to system, is the only legal move.  I doubt operator+ is well-
defined on non-ideal structures.  Rationals are not floats, but system
got checked.  Define concurrency.


From goldnery at gmail.com  Sat May 10 09:01:39 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 06:01:39 -0700 (PDT)
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
Message-ID: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>

On May 10, 2:36 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Gandalf wrote:
> > how can i ran script with python
>
> It depends on your web server configuration. To get your web server
> execute Python code, there are several alternatives like
>
> * CGI
> * FastCGI
> * mod_python
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #93:
>
> Feature not yet implemented

my server is my computer and all i did way to install python on it.


From notnorwegian at yahoo.se  Thu May 22 13:44:53 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 10:44:53 -0700 (PDT)
Subject: import X vs from x import *
Message-ID: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>

import Tkinter
from Tkinter import *

i have a program where if i comment out either of those import-
statements i get an error.

i thought they meant the same thing and from was supposed to be just
to imort just a specific function and the * imports everything in the
module.
but aparently the above statements have diffrent meaning and i cant
figure it out fromt he tutorials.


From bj_666 at gmx.net  Tue May 13 07:35:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 11:35:24 GMT
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <68tcnsF2uo1qcU3@mid.uni-berlin.de>

On Tue, 13 May 2008 03:25:06 -0700, wxPythoner wrote:

> Why is the  \  backslash character frowned upon?

Is it frowned upon?

Ciao,
	Marc 'BlackJack' Rintsch


From jcd at sdf.lonestar.org  Wed May 28 10:39:22 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Wed, 28 May 2008 10:39:22 -0400
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
Message-ID: <1211985562.3335.18.camel@aalcdl07.lib.unc.edu>

On Wed, 2008-05-28 at 09:31 -0400, Alok Kumar wrote:
> I am getting following error when tried as you suggested.
> 
> self.event = []  #Create an empty list, bind to the name "event" under
> the "self" namespace
>            self.event.append(Event())   #Create an event object and
> append to the end of the list 
> 
> class Event():
>                 ^
> SyntaxError: invalid syntax
> 

He meant to say

  class Event(object):

Always subclass object, unless you have a very compelling reason not to,
or you are subclassing something else.




From dotancohen at gmail.com  Mon May 12 15:46:41 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Mon, 12 May 2008 22:46:41 +0300
Subject: Learning Python for no reason
In-Reply-To: <1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
	<1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>
Message-ID: <880dece00805121246g1d16ee61sd566cf6a75b5190b@mail.gmail.com>

2008/5/12 Grant Edwards <grante at visi.com>:
> For windows/unix hosted user-space applications, Python is
> pretty hard to beat.

Apparently, pythons _can_ be beat: (warning: graphic)
http://www.proexotics.com/graphics/ball_python_live_prey_1.jpg

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From alex.m.gusarov at gmail.com  Mon May 26 06:05:45 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 17:05:45 +0700
Subject: finding icons for Apps
In-Reply-To: <ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>
References: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
	<ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>
Message-ID: <ac6dcb3d0805260305h1a69cfcfh207c15d9fdfa0342@mail.gmail.com>

> With PyQt4 I can use even .SVG icons on all platforms ;) (and tango
> includes svg version for all icons)
>

Ok, I got it - "the thing you see on the Desktop or in a folder", sorry

Best regards, Alex Gusarov
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From arnodel at googlemail.com  Thu May 29 07:37:04 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 29 May 2008 12:37:04 +0100
Subject: Unit tests?
References: <mailman.1728.1212060473.12834.python-list@python.org>
Message-ID: <m2hcch2vfj.fsf@googlemail.com>

"Alex Gusarov" <alex.m.gusarov at gmail.com> writes:

> Hello, it seems that I have a problem - I almost finished my program
> and it's necessary to test it. But I've never do it before. I even
> don't know how I can do it.
> Please, give me some links to testing techniques, either common or
> specific to Python.
> I searched in Google for information, but 'cause I don't know anything
> about subject, I don't know where to start from.
>
> Thanks
> --
> Best regards, Alex Gusarov

Try googling "python unit test".  I did it, and amongst the first hits
were:

    * docs.python.org/lib/module-unittest.html

    * http://www.diveintopython.org/unit_testing/index.html

-- 
Arnaud


From kamhung.soh at gmail.com  Thu May  8 03:33:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 08 May 2008 17:33:36 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com>
Message-ID: <op.uatraax1ev04yd@melwxp23>

On Thu, 08 May 2008 15:42:07 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> This is what i've came up with.  My problem is that I can't get them to  
> properly evaluate.. when  comparewords() runs it finds itself...  Should  
> I have the keys of mapdict iterate over itself?  Is that possible?
>
> def annafind():
> 	fin = open('text.txt')		# file has one word per line
> 	mapdic = {}			# each word gets sorted & goes in here
> 	for line in fin:
> 		rawword = line.strip()
> 		word = list(rawword)
> 		word.sort()
> 		mapdic[''.join(word)] = 0
> 	return mapdic
>
>
> def comparewords(): ***not working as intended
> 	fin = open('text.txt')
> 	for line in fin:
> 		line = line.strip()
> 		word = list(line)
> 		word.sort()
> 		sortedword = (''.join(word))
> 		if sortedword in mapdic:
> 			print line
>
>
>
>
> On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com>  
> said:
>
>> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>
>> wrote:
>>
>>> Hi All,
>>>  I wrote a program that takes a string sequence and finds all the words
>>
>>> inside a text file (one word per line) and prints them:
>>>  def anagfind(letters): 	#find anagrams of these letters
>>> 	fin = open('text.txt')	#one word per line file
>>> 	wordbox = []		 #this is where the words will go
>>> 	for line in fin:
>>> 		word = line.strip()
>>> 		count = 0
>>> 		for char in letters:
>>> 			if char not in word:
>>> 				break
>>> 			else:
>>> 				count += 1
>>> 			if count == len(word):
>>> 				wordbox.append(word)
>>> 	return wordbox
>>>  Now I'd like to modify the code to naturally find all anagrams inside
>> a
>>> wordlist.  What would be the best way to do this?  Using Hints?  Is it
>>
>>> possible to iterate over dict keys?  How can I make a dict that maps
>>
>>> from a set of letters to a list of words that are spelled from those
>>
>>> letters?  Wouldn't I need to make the set of letters a key in a dict?
>>>  As always - Thanks for helping someone trying to learn...
>>>  Dave
>>>
>>  Suggestion: for each word, sort their characters and use them as the
>> dictionary key.  If two words have the same combination of characters,
>> then they are anagrams.  For example: "edam" and "made" are anagrams
>> because they have the letters 'a', 'd', 'e' and 'm'.
>>  Refer "Programming Pearls" by Jon Bentley.
>>  --
>> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</  
>> a>
>
>

Your code is always going to return the same list because every word is an  
anagram of itself.

Tip: Create a list for each dictionary key, then add a word to the list if  
that word is not in the list.  So:

mapdic('adem') --> ["edam", "made"]

P.S. When replying, the convention is to add your response to the bottom,  
not top of the message.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From kyosohma at gmail.com  Fri May 16 09:11:54 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:11:54 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <d4420c20-9db7-4a4d-861b-7ed60df7b531@34g2000hsh.googlegroups.com>

On May 16, 5:44?am, Wolfgang Draxinger <wdraxin... at darkstargames.de>
wrote:
> Mike Driscoll wrote:
> > Hi,
>
> > I've had this niggling issue from time to time. I want to
> > create a shortcut on the user's desktop to a website that
> > specifically loads Firefox even if Firefox is not the default
> > browser.
>
> > I usually use COM as it allows very specific settings of the
> > shortcut, such as the Working Directory and the Target Path.
> > However, the following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop +
> > '\\MyShortcut.lnk') shortcut.Targetpath = r'"C:\Program
> > Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to
> > Firefox out, it works too. Is there another method I can use
> > other than creating the shortcut by hand and using the shutil
> > module?
>
> > Thank you for any ideas.
>
> I see four problems:
>
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.
>
> 2) In URIs there are no backslashes, only forward slashes. You
> coded
>
> https:\...
>
> which is _WRONG_. URIs are <protocoll>://<host>/<resource>, where
> for some protocolls <host> is empty (file protocoll e.g.).


That was an accident...my original code was correct, but I stupidly
decided to generalize my website's name and put the wrong slashes in.


>
> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. On *nix
> systems you normally have all programs in $PATH, so a non full
> qualified path would be sufficient. On Windows this works, too,
> _IF_ the installation directory of the to be used application
> get's added to the PATH environment variable.
>


I don't assume it at all. At my place of business, that's where
Firefox is. If it's not installed there when the user logs in, one of
my scripts installs it automatically.


> Wolfgang Draxinger
> --
> E-Mail address works, Jabber: hexar... at jabber.org, ICQ: 134682867



From gagsl-py2 at yahoo.com.ar  Thu May 15 05:43:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 06:43:51 -0300
Subject: How to subclass file
References: <2oLWj.137678$rd2.90955@pd7urf3no>
Message-ID: <op.ua6vzdwcx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 21:23:26 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> I want to create a subclass of 'file' but need to open the file with  
> os.open
> (because I want to open it in exclusive mode), and need an additional  
> method.
>
> Because I need an additional method, I truly need a object of my sublass.
> If I do something like
>
> class myFile(file):
>
>   def __new__(cls, filename):
>     import os
>     fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
>    return os.fdoen(fd, 'w')
>
>   def myMethod(self):
>     do_something
>
>
> then x = myFile('somefilename') is of type file, not myFile, and  
> therefore
> does not have myMethod as a valid method.

Use delegation instead of inheritance.

 from __future__ import with_statement
import os

class myFile(object):
     __slots__ = ['_file']

     def __init__(self, filename):
         fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
         f = os.fdopen(fd, 'w')
         object.__setattr__(self, '_file', f)

     def __getattr__(self, name):
         return getattr(self._file, name)

     def __setattr__(self, name, value):
         setattr(self._file, name, value)

     def mymethod(self):
         print "anything"


<output>
py> regular_file = open(r"c:\\temp\\regular.txt", "wt")
py> special_file = myFile(r"c:\\temp\\special.txt")
py> print regular_file
<open file 'c:\\temp\\regular.txt', mode 'wt' at 0x00A411D0>
py> print special_file
<__main__.myFile object at 0x00A3D1D0>
py> print dir(regular_file)
['__class__', '__delattr__', '__doc__', '__enter__', '__exit__',  
'__getattribute
__', '__hash__', '__init__', '__iter__', '__new__', '__reduce__',  
'__reduce_ex__
', '__repr__', '__setattr__', '__str__', 'close', 'closed', 'encoding',  
'fileno'
, 'flush', 'isatty', 'mode', 'name', 'newlines', 'next', 'read',  
'readinto', 're
adline', 'readlines', 'seek', 'softspace', 'tell', 'truncate', 'write',  
'writeli
nes', 'xreadlines']
py> print dir(special_file)
['__class__', '__delattr__', '__doc__', '__getattr__', '__getattribute__',  
'__ha
sh__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',  
'__re
pr__', '__setattr__', '__slots__', '__str__', '_file', 'mymethod']
py> with special_file:
...   special_file.write("hello\n")
...   special_file.mymethod()
...
anything
py> print "closed?", special_file.closed
closed? True
</output>

(note that __enter__/__exit__ -used by the with statement- work fine, even  
if not listed by dir(); also the "closed" attribute exists and is set  
correctly)

Note also that myFile is *not* a subclass of file:

py> isinstance(special_file, file)
False

but it has all methods and attributes of file objects, even if  
dir(special_files) doesn't list them. Duck typing in action - typical  
Python code should work fine with this myFile object instead of a true  
file object, but if you actually need a file subclass, I think you'll have  
to write a C extension.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Mon May 12 14:04:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 19:04:01 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
	<caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>
	<4f10b3e8-065b-4592-9b62-7678bcafb137@27g2000hsf.googlegroups.com>
Message-ID: <m2prrrielq.fsf@googlemail.com>

Mark Dickinson <dickinsm at gmail.com> writes:

> On May 12, 11:15?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>
>> But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
>> which is not the x=0 axis (I think at least - it seems easy to prove
>> that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
>> f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).
>
> Agreed.  And this makes an excellent argument that if you're going to
> choose a number for 0.0**0.0 then it's got to be 1.  But I still don't
> find it completely convincing as an argument that 0.0**0.0 should be
> defined at all.
>
>> This should cover most practical uses?
>
> Maybe.  But if you're evaluating x**y in a situation where x and y
> represent physical quantities, or otherwise have some degree of error,
> then you probably want to be warned if x and y both turn out to be
> zero.

Yes.  I'm not much of a physicist so I don't feel confident about this
at all, but when you work out x**y, if x is a measured quantity with
dimensions, then raising it to a power only makes sense if y is
dimensionless and an integer, or maybe a rational with a small
denominator (i.e. it makes sense to cube root a volume, but not a
velocity).

-- 
Arnaud


From ivan.illarionov at gmail.com  Thu May  1 20:20:56 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 2 May 2008 00:20:56 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru> <874p9hvce5.fsf@physik.rwth-aachen.de>
Message-ID: <fvdmp8$3ep$3@news.mtu.ru>

On Fri, 02 May 2008 01:21:38 +0200, Torsten Bronger wrote:

> Hall?chen!
> 
> Ivan Illarionov writes:
> 
>> [...]
>>
>> For me it looks more like an old-school/new-school thing than use-case
>> thing. I may be wrong, but I see more and more new projects use things
>> like reST and YAML/JSON and it feels like they are gradually replacing
>> traditional old-school solutions.
>>
>> And I've got very strong impression that YAML is a the future of
>> configuration files when Google released their App Engine.
> 
> In contrast to many other areas of software, configuration files needn't
> be compatible with anything except the user's brain.  So even if the
> rest of the world uses config format X, you can safely stick with config
> format Y.

There are several reasons for compatibility:

1. The user or another developer might want to write GUI front-end to 
configure your app. With standard format this would be easier.

2. Similar apps might want to have a feature like "import settings" from 
other apps. Traditional config files made this PITA -- and that's why 
this feature is extremely rare.

3. Bigger applications that include your sofware as one of its components 
may need to automate configuration process and update several config 
files of different smaller apps from one global setting.

That's precisely why first XML and now YAML became popular for config 
files.

> I mean, YAML is not really a complex thing, yet it was conceived not
> before 2001.  The reason is that traditional config files do a good job.
> 
> Tsch?,
> Torsten.

-- 
Ivan


From fdsa at jklh.dili5na  Fri May 30 19:23:05 2008
From: fdsa at jklh.dili5na (Gordon Etly)
Date: Fri, 30 May 2008 16:23:05 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
Message-ID: <6abgirF358rgoU1@mid.individual.net>

Lew wrote:
> John Thingstad wrote:

> > Perl is solidly based in the UNIX world on awk, sed, bash and C.
> > I don't like the style, but many do.

> Please exclude the Java newsgroups from this discussion.

Why? Do you speak for everyone in that, this, or other groups?


-- 
G.Etly 




From rhamph at gmail.com  Mon May 12 16:19:15 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 12 May 2008 13:19:15 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com> 
	<5bb546cd-1175-434c-9843-70f2ff691f15@c19g2000prf.googlegroups.com>
Message-ID: <4cdb7e58-85e4-4e3f-8244-df87526b82a3@k10g2000prm.googlegroups.com>

On May 12, 1:31 pm, skunkwerk <skunkw... at gmail.com> wrote:
> On May 12, 1:40 am, Rhamphoryncus <rha... at gmail.com> wrote:
>
>
>
> > On May 11, 10:16 am,skunkwerk<skunkw... at gmail.com> wrote:
>
> > > On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > > > declaimed the following in comp.lang.python:
>
> > > >         Coming in late...
>
> > > > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > > > >skunkwerkwrote:
> > > > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > > > new requests are inserted, like so:
>
> > > >         <snip>
>
> > > > > > > queue = Queue.Queue(0)
> > > > > > >  WORKERS=100
> > > > > > > for i in range(WORKERS):
> > > > > > >    thread = SDBThread(queue)
> > > > > > >    thread.setDaemon(True)
> > > > > > >    thread.start()
>
> > > > > > > the thread:
>
> > > > > > > class SimpleDBThread ( threading.Thread ):
> > > > > > >    def __init__ ( self, queue ):
> > > > > > >            self.__queue = queue
>
> > > >         Note: double-leading __ means "name mangling" -- typically only
> > > > needed when doing multiple layers of inheritance where different parents
> > > > have similar named items that need to be kept independent; a single _ is
> > > > the convention for "don't touch me unless you know what you are doing"
>
> > > > > > >            threading.Thread.__init__ ( self )
> > > > > > >    def run ( self ):
> > > > > > >            while 1:
> > > > > > >                    item = self.__queue.get()
> > > > > > >                    if item!=None:
> > > > > > >                            model = domain.get_item(item[0])
> > > > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > > > >                            title = model['title']
> > > > > > >                            scraped = model['scraped']
> > > > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > > > any suggestions?
> > > > > > > thanks
>
> > > >         <snip>
>
> > > > > thanks John, Gabriel,
> > > > >   here's the 'put' side of the requests:
>
> > > > > def prepSDBSearch(results):
> > > > >    modelList = [0]
> > > > >    counter=1
> > > > >    for result in results:
> > > > >            data = [result.item, counter, modelList]
> > > > >            queue.put(data)
> > > > >            counter+=1
> > > > >    while modelList[0] < len(results):
> > > > >            print 'waiting...'#wait for them to come home
> > > > >    modelList.pop(0)#now remove '0'
> > > > >    return modelList
>
> > > >         My suggestion, if you really want diagnostic help -- follow the
> > > > common recommendation of posting the minimal /runable (if erroneous)/
> > > > code... If "domain.get_item()" is some sort of RDBM access, you might
> > > > fake it using a pre-loaded dictionary -- anything that allows it to
> > > > return something when given the key value.
>
> > > > > responses to your follow ups:
> > > > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > > > list in the above function.  it's not global, and the initial values
> > > > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > > > passes in the same memory address or declares a new 'data' list (which
> > > > > I guess is what I want)
>
> > > >         Rather confusing usage... In your "put" you have a list whose first
> > > > element is "result.item", but then in the work thread, you refer to the
> > > > entire list as "item"
>
> > > > > 3)  the first item in the modelList is a counter that keeps track of
> > > > > the number ofthreadsfor this call that have completed - is there any
> > > > > better way of doing this?
>
> > > >         Where? None of your posted code shows either "counter" or modelList
> > > > being used by thethreads.
>
> > > >         And yes, if you havethreadstrying to update a shared mutable, you
> > > > have a race condition.
>
> > > >         You also have a problem if you are using "counter" to define where
> > > > in modelList a thread is supposed to store its results -- as you can not
> > > > access an element that doesn't already exist...
>
> > > > a = [0]
> > > > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> > > >         Now, if position is irrelevant, and a thread just appends its
> > > > results to modelList, then you don't need some counter, all you need is
> > > > to check the length of modelList against the count expected.
>
> > > >         Overall -- even though you are passing things via the queue, the
> > > > contents being pass via the queue are being treated as if they were
> > > > global entities (you could make modelList a global, remove it from the
> > > > queue entries, and have the same net access)...
>
> > > >         IOWs, you have too much coupling between thethreadsand the feed
> > > > routine...
>
> > > >         As for me... I'd be using a second queue for return values...
>
> > > > WORKERTHREADS = 100
> > > > feed = Queue.Queue()
> > > > result = Queue.Queue()
>
> > > > def worker():
> > > >         while True:
> > > >                 (ID, item) = feed.get()                 #I leave the queues globals
> > > >                                                                                 #since they perform locking
> > > >                                                                                 #internally
> > > >                 model = domain.get_item(item)
> > > >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > > > for i in range(WORKERTHREADS):
> > > >         aThread = threading.Thread(target=worker)
> > > >                 #overkill to subclass as there is now no specialized init
> > > >                 #and if I really wanted to make the queues non-global
> > > >                 #I'd pass them as arguments:
> > > >                 #       threading.Thread(target=worker, args=(feed, results))
> > > >                 #where worker is now
> > > >                 #       def worker(feed, results):
> > > >         aThread.setDaemon(True)
> > > >         aThread.start()
>
> > > > ...
>
> > > > def prepSearch(searches):
> > > >         modelList = []
> > > >         counter = 0
> > > >         for searchItem in searches:
> > > >                 feed.put( (counter, searchItem) )
> > > >                 counter += 1
> > > >                 modelList.append(None)  #extend list one element per search
> > > >         while counter:
> > > >                 (ID, title, scraped) = results.get()
> > > >                 modelList[ID] = (title, scraped)
> > > >                 counter -= 1
> > > >         return modelList
>
> > > >         The only place counter and modelList are modified are within the
> > > > prepSearch. I'm passing counter out and back to use as an ID value if
> > > > the final results are supposed to be in order -- that way if one thread
> > > > finishes before another, the items can be placed into the list where
> > > > they'd have been sequentially.
>
> > > >         I can only hope that "domain.get_item" is an activity that is I/O
> > > > bound AND that it supports parallel accesses... Otherwise the above
> > > > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > > > threading swaps for what is otherwise a rather linear process.
>
> > > >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > > > mainthreadsthat are posting to the worker feed queue (and you were
> > > > using separate mutables for storing the results). In this situation, I'd
> > > > remove the results queue from being a global entity, create one queue
> > > > per main processing thread, and pass the queue as one of the parameters.
> > > > This way, a worker can return data to any source thread by using the
> > > > supplied queue for the return...
>
> > > > Modify prepSearch with:
>
> > > >         myQueue = Queue.Queue()
> > > > ...
> > > >         feed.put( (counter, searchItem, myQueue) )
> > > > ...
> > > >         (ID, title, scraped) = myQueue.get()
>
> > > > Modify worker with:
>
> > > >         (ID, item, retqueue) = feed.get()
> > > > ...
> > > >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> > > wow.  thanks for the help.
> > >    i seem to have fixed my problem though - it turns out
> > > domain.get_item was not thread safe as it was using the underlying
> > > httplib.  the solution was to create a new connection to the database
> > > for each thread (which is ok as the database is meant to be queried in
> > > a massively paralell fashion).  the missing part of the code included
> > > a part where i inserted the results at the given position into the
> > > list.
>
> > > the only issue i have now is that it takes a long time for 100 threads
> > > to initialize that connection (>5 minutes) - and as i'm doing this on
> > > a webserver any time i update the code i have to restart all those
> > > threads, which i'm doing right now in a for loop.  is there any way I
> > > can keep the thread stuff separate from the rest of the code for this
> > > file, yet allow access?  It wouldn't help having a .pyc or using
> > > psycho, correct, as the time is being spent in the runtime?  something
> > > along the lines of 'start a new thread every minute until you get to a
> > > 100' without blocking the execution of the rest of the code in that
> > > file?  or maybe any time i need to do a search, start a new thread if
> > > the #threads is <100?
>
> > $ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
> > t.start(); t.join()'
> > 10000 loops, best of 3: 131 usec per loop
>
> > Clearly it is not the threads themselves, but something else which is
> > expensive.
>
> > It's not clear why you need threads at all.  Unless you've got a lot
> > of cpus/cores running that DBMS, or it's got fairly high latency (and
> > no way to pipeline), attacking it with more threads isn't gonna give
> > significant speedups.
>
> correct.  the threads themselves are not taking up the time, but the
> initialization of each thread (which includes making a new connection
> to the database) - typically this is ~3 seconds.  The database is
> amazon's simpleDB, which is meant to support massively parallel
> queries.  once the connection has been made, queries are very fast.

So it shouldn't take much more than 3 seconds to create all 100
threads.  It certainly should take 5 minutes.  However, 3 seconds *
100 = 5 minutes, so it sounds like the connection process is getting
serialized somehow.

Maybe you're doing the connection in the thread's __init__?  Note that
__init__ is called when the thread *object* is created, by the main
thread, and not when you *start* the thread.

I find the threading.Thread API to be vastly over complicated.  It's
much simpler to wrap it like this:

def start_thread(func, *args, **kwargs):
    t = threading.Thread(target=func, args=args, kwargs=kwargs)
    t.start()
    return t

Then you can pass a function to start_thread and it will run in the
new child thread.


From andrej.panjkov at climatechange.qld.gov.au  Tue May  6 01:31:22 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Mon, 5 May 2008 22:31:22 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org> 
	<fvigaa$bdc$1@panix3.panix.com>
Message-ID: <956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>

At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
other unixy OSes.

We have python installed in a number of different places:
/bin/python
/usr/local/bin/python
/usr/bin/python
/opt/freeware/Python/Python-2.5.1/bin/python
~mataap/platform/python/python-2.5.1

So I cannot assume a single location for python.  Nor for any other
tool, really.  Bash for example.  It may indeed be in /usr/bin on many
systems, on many others it is not.

Note the version specific install points.  This allows us to switch
over easily to different versions, and keep older versions in case
they are needed.  We can test new versions before cutting over to them
operationally. (This matters for tools that are still changing, like
python or bash.)

We use the very handy 'modules' package (not python modules, not
fortran modules) to adjust our paths and environment variables as
needed.

Some of the install points are determined by policy, or historical
constraints, or hardware limits, or file system layout.

Now it is true that it is easy to edit a single script to change the
hashbang line.  It is not easy to change several hundred scripts, on
different machines.  It is easy to adjust the environment to point to
the right python path, and have all your scripts pick it up
automatically.

Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.


From notbob at nothome.com  Wed May 21 16:10:41 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 20:10:41 GMT
Subject: php vs python
Message-ID: <5l%Yj.77$mz3.53@fe101.usenetserver.com>

I'm not posting this just to initiate some religious flame war, though it's
the perfect subject to do so.  No, I actaully want some serious advice about
these two languages and since I think usenet is the best arena to find it,
here ya' go.

So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
want learn the guts of it instead of just booting up some wordwank or
whatever.  I started to learn python, but heard php was easier or faster or
more like shell scripting or... fill in the blank.  Anyway, so I change over
to learning php.  Then I run across that blog, Coding Horror, and start
reading articles like this:

http://www.codinghorror.com/blog/archives/001119.html

Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
much.  I can setup mysql and apache,, but don't know how to use 'em, really.
I use emacs and run slackware and can fumble my way through bash scripts,
but I can't really write them or do lisp.  I've taken basic basic and basic
C, but am barely literate in html.  Sometimes it seems overwhelming, but I
persevere because it's more fun/challenging than video games, which bore me
to tears.  

Well, that's my actual question, then.  Is php really so bad I'm just
wasting my time?  Or is it really the quickest way to blog functionality?
Would I be better served in the long run learning python, which claims to be
easy as pie to learn/program (still looks hard to me).  I admit I'm no code
geek.  But, I'm not completely brain dead, either, and I need something to
keep my geezer brain sparking.  What say ye?

nb


From castironpi at gmail.com  Sat May 17 20:58:50 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 17:58:50 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com> 
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com> 
	<2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>
Message-ID: <d0bee883-f59a-4fc9-a17c-35c5d4ff6901@e53g2000hsa.googlegroups.com>

On May 16, 5:57?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 5:22?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
> > > globalrev wrote:
> > > > i ahve a program that takes certain textsnippets out of one file and
> > > > inserts them into another.
>
> > > > problem is it jsut overwrites the first riow every time.
>
> > > > i want to insert every new piece of text into the next row.
> > > > so:
> > > > 1. how do i write to a new line every time i write to the file?
>
> > > > 2. if i dont want to write to a new line but just want to insert it
> > > > after the last token in the file, how do i do then?
>
> > > Generally, you can't "insert" anything into a file. ?You can either
> > > append to the end of a file, or you can rewrite the whole file. ?It
> > > sounds like you probably want to read the file into an array using
> > > readlines(). ?Then manipulate that array however you want--appending
> > > and inserting--and when you are done, overwrite the file with your
> > > array.
>
> > > However, you should be aware that as soon as you open a file for
> > > writing all the data is erased, and if your program should happen to
> > > crash right then, the array containing the data will disappear into
> > > the ether and your file will be empty--in other words all your data
> > > will be gone. ?To prevent such an occurence, you should write your
> > > final data to another file, then delete the original file, and finally
> > > change the other file's name to the original file name.
>
> > Some options:
>
> > 1. ?Limit line length. ?Then offset is ( line* length ).
> > 2. ?Name your relation.
> > 3. ?Hijack the operating system. ?Remember:
>
> > abc
> > def
>
> > on disk looks like
> > abc\ndef
>
> > where
>
> > abcd
> > def
>
> > looks like
> > abcd\ndef
>
> > So, if you want line 2, you have to scan line 1.- Hide quoted text -
>
> > - Show quoted text -
>
> You also have
>
> f.seek( X )
> f.write( 'abc' )
>
> which writes 'abc' in the middle, at offset X.
>
> f.seek( 0, SEEK_END )
>
> takes you to the back, and don't forget
>
> f.flush( ).
>
> Say you have:
>
> File:
>
> abc
> def
> ghi
>
> Symbols:
>
> 0-3
> 1-3
> 2-3
>
> abcdefghi
>
> and you want to make abc abC. ?Then
>
> f.seek( 2 )
> f.write( 'C' )
>
> does work.
>
> If you want to make abc ab, then you change a different file
>
> table.seek( 0 )
> table.write( chr( 2 ) )
>
> ( or bytes( [ 2 ] ) in 3.0 ).
>
> If you want to make abc abcd, then you change both.
>
> f.seek( 9 )
> f.write( 'd' )
>
> table.seek( 0 )
> table.write( chr( 4 ) )
>
> But. ?Now you have item 0 in two places. ?'abc' somewhere and 'd'
> somewhere else, at 0 and at 9 respectively. ?I think the file system
> overallocates room for String 1. ?You would read:
>
> 0- 2- [ 3, 1 ]
>
> for 'abc'+'d'
>
> and
>
> 1- 1- [ 3 ]
> 2- 1- [ 3 ]
>
> for 'def' and 'ghi', where actual representations would be:
>
> 0- 2- [ 0/3, 9/1, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> As your chains start to grow, leave table 8xN, and just copy strings
> to new sectors when they become long:
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> You can insort in linear time when you're looking for available slots.
>
> 'jklm' can't fit at 0.
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
>
> but 'nop' can.
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
> 4- 1- [ 0/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> 'jklm' could've with a split:
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
>
> and with 'nop':
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
> 4- 1- [ 14/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> There's an easy chance you can beat DbfilenameShelf for your
> application.- Hide quoted text -
>
> - Show quoted text -

I am still interested in this one, but doubt if anyone still reading.


From goldnery at gmail.com  Fri May 23 14:44:52 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 11:44:52 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com>
Message-ID: <57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com>

you've been very helpful but still i have only one problem. I wont the
window not to be close after clicking the X button.
I wont the program to stay on the toolbar

thanks!


From eliben at gmail.com  Tue May 27 11:54:48 2008
From: eliben at gmail.com (eliben)
Date: Tue, 27 May 2008 08:54:48 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
	<acf63ade-4704-47a4-8cc1-8139b7c8e38c@f36g2000hsa.googlegroups.com>
Message-ID: <e4db75a8-1c51-42fb-aed2-aba92232fcb4@k37g2000hsf.googlegroups.com>

On May 26, 7:30 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 25 Mag, 17:40, eliben <eli... at gmail.com> wrote:
>
>
>
> > Hello,
>
> > I have a small wxPython application. Today I was trying to add some
> > RPC capability to it, so I implemented an instance of
> > SimpleXMLRPCServer that runs in a separate thread when invoked and
> > answers requests.
>
> > All went fine until I realized that I have to sometimes stop the
> > server - which is where I ran into a problem. Python threads can not
> > be killed after they've been started. They can be kindly requested to
> > end, but it's up to the thread itself to decide when it wants to
> > finish. At least this is my understanding. It probably makes sense,
> > because threads can hold resources which can't just be dropped
> > suddenly, and have to be cleaned in a proper manner. (Does this sound
> > like the truth ?)
>
> > Anyway, this creates a problem because SimpleXMLRPCServer likes to
> > block and never return. I dug deeper and found out that all offspring
> > of SocketServer can only handle requests in a blocking manner. Even if
> > you call handle_request( ) and not serve_forever(), it will block
> > until a request is received and handled. This means that a
> > SocketServer object running in a thread blocks the thread, and this
> > thread can not be stopped.
>
> > Is there any graceful solution to this problem ?
>
> > I suppose I can use sockets in non-blocking mode, or use select(), but
> > this will mean I will have to implement my server with raw sockets and
> > not a handy helper like SocketServer. For the XML-RPC server I want
> > this is a headache, as I will probably have to implement my own XML-
> > RPC server based on raw non-blocking sockets.
>
> > Thanks in advance for any ideas and suggestions
> > Eli
>
> A "shutdown" method has been added to SocketServer.
> Since it will be available in Python 2.6 and 3.0 you could look at the
> patch and include a modified version of SocketServer into your package
> and use it:http://bugs.python.org/issue1193577
>

This is what I was looking for, thanks.




From netizen at gmx.de  Wed May 28 07:42:15 2008
From: netizen at gmx.de (Michael Fesser)
Date: Wed, 28 May 2008 13:42:15 +0200
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>

.oO(Ivan Illarionov)

>No. Language does matter.

And the weather.

If you know how to program, you can write good code in any language if
you're familiar enough with it. Many people write good code in PHP, and
many write total crap in C/C++. It's almost never about the language,
but about the programmer.

Micha


From vivainio at gmail.com  Mon May  5 12:39:08 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 16:39:08 GMT
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <MKGTj.182$4X3.170@read4.inet.fi>

ron.longo wrote:

 > unable to execute.  Why is this?  At this point I'm not really keen on
 > handing out the source files to my application, it feels unprofessional.

If you plan to deploy on windows, py2exe could be the more 
"professional" approach you are thinking of.


From larry.bates at websafe.com`  Fri May 16 10:04:58 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 09:04:58 -0500
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
Message-ID: <i4-dnX9BabMMCbDVnZ2dnUVZ_gCdnZ2d@comcast.com>

globalrev wrote:
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
>>
>>> wassup here?
>>> 7
>>> Traceback (most recent call last):
>>>   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
>>> <module>
>>>     print cust1.getID()
>>> AttributeError: 'NoneType' object has no attribute 'getID'
>>> class customer:
>> 1/ naming convention : class names should be CamelCased
>> 2/ unless you need compatibility with years old Python versions, use
>> newstyle classes
>>
>> class Customer(object):
>>
>>>     def __init__(self, ID, movies):
>>>         self.ID = ID
>>>         self.movies = movies
>> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>>
>>      def __init__(self, id, movies):
>>          self.id = id
>>          self.movies = movies
>>
>>>     def getID():
>>>         return self.ID
>>>     def getMovies():
>>>         return self.movies
>> 4/ Python has support for computed attributes, so you just don't need
>> these getters.
>>
>>
>>
>>> import os
>>> import customer
>>> import movie
>>> mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
>>> mv1str = mv1.read()
>>> print mv1str.count(',5,')
>>> cust1 = customer.__init__('12',['1','435','2332'])
>> __init__ is automagically called on instanciation, so you don't have to
>> call it yourself. And FWIW, your __init__ returns None.
>>
>> cust1 = Customer('12', ['1', '435', '2332'])
>>
>>> print cust1.getID()
>> print cust1.id
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 

You really should back up and go through the Python tutorial.

cust1.movies() tells Python to call the object pointed to by cust1.movies (note 
the parenthesis after .movies).  Since that object (in your case) is a list, 
that makes no sense (which is exactly what the traceback said).

print "cust", cust1.idnbr, cust1.movies

is what you want here.

-Larry


From exarkun at divmod.com  Tue May 13 20:56:03 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 20:56:03 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <f9cc40fa-20ff-4936-9ed0-0b6cad014ca3@y38g2000hsy.googlegroups.com>
Message-ID: <20080514005603.6859.2106502900.divmod.quotient.63149@ohm>

On Tue, 13 May 2008 16:44:11 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>
> [snip]
>>
>> To support scheduling calls, you just have to know when the next call is
>> going to happen.  Then, you can wake up at exactly that time.  This is
>> what Twisted does, even for select reactor. ;)
>
>Yes but how do you know when it's the time to fire up a call without
>using a thread?
>You are forced to call time.time() periodically and check if that time
>had come every time.
>Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
>That's where that should happen.
>

Why?  Isn't this why subtraction exists?  If there is a call scheduled to
happen at T1 and the current time is T2, then I know that after (T1 - T2)
elapses, it will be time to run the call.  Why do I have to do any checks
at all?  I just tell select() to wait that long.  Presumably this is just
what someone will do if they want to use asyncore with timed calls.  Call
asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

So, actually, I'm not sure what the disagreement is about. ;)  The
default value for the timeout parameter to the loop function seems
somewhat irrelevant.  If someone wants timed events in their loop,
asyncore isn't standing in their way.  On the other hand, I didn't
this thread (or maybe just this part of the thread) start out with
a question about asyncore throughput?  I have no idea what that
might have to do with this.

Jean-Paul


From castironpi at gmail.com  Tue May 20 10:04:32 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 07:04:32 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>

On May 20, 5:04?am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> John Salerno <johnj... at NOSPAMgmail.com> wrote:
> >>>> a = 'this is longer'
> >>>> b = 'this is longer'
> >>>> a == b
> > True
> >>>> a is b
> > False
>
> > In the above example, Python has created only one string called
> > 'hello' and both x and y reference it. However, 'this is longer' is
> > two completely different objects.
>
> That is true when run interactively, but the behaviour changes again if you
> run it as a script:
>
> C:\Temp>type t.py
> a = 'this is longer'
> b = 'this is longer'
> print a is b
>
> C:\Temp>t
> True
>
> In short, two equal strings may or may not be identical and any code which
> makes assumptions based on observed behaviour is broken. If you want to be
> able to test identity on strings safely then use the 'intern()' builtin to
> get repeatable behaviour.
>
> --
> Duncan Boothhttp://kupuguy.blogspot.com

Strictly speaking, identity is a real notion whereas equality is an
ideal (symbolic) notion.  There is no such thing as real true equals.
Furthermore, there are no true real symbols.  But, as puzzling as that
is:

'abc' == 'abc'
abc is abc

I argue that 'is' should never be used for primitives/literals.

a is 4  #bad
a is b  #good
a is 'abc' #bad
a is { None: None } #bad
a== { None: None } #good

Just good thing I don't have check-in priveleges, right? :)


From duncan.booth at invalid.invalid  Sun May  4 11:58:25 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 May 2008 15:58:25 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <Xns9A94ACAB89668duncanbooth@127.0.0.1>

Szabolcs Horv?t <szhorvat at gmail.com> wrote:

> I thought that it would be very nice if the built-in sum() function used 
> this algorithm by default.  Has this been brought up before?  Would this 
> have any disadvantages (apart from a slight performance impact, but 
> Python is a high-level language anyway ...)?

There's a thread you might find interesting:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a

In that thread I suggested that Python ought to implement sum by adding 
together each pair of values, then each pair of results and so on. This 
means that for input values of a similar magnitude the intermediate results 
stay balanced. The implementation doesn't actually do all the first level 
sums first, it builds up a stack containing the sum of 2^k, 2^(k-1)...2 
values. Also it works for other types as well, and for strings or lists has 
the advantage of minimising the number of large string or list concatenations.

If you follow that thread far enough you'll find a post by Jussi Salmela 
which shows that summing adjacent pairs performs as well as Kahan summation
(he says 'almost as good' but in fact the only time they get different 
results the 'correct' answer is 500000.000005 and Kahan and sumpairs get 
the two nearest representable results either side: 500000.00000499998 and 
500000.00000500004 respectively).

I never did get round to re-coding my sumpairs() function in C, I would be 
interested to see just how much overhead it introduces (and I suspect it
would be faster than the existing sum in some cases such as for lists).


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 04:46:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 10:46:32 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1431.1211387644.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
Message-ID: <483532d6$0$5880$426a34cc@news.free.fr>

Daniel Fetchinson a ?crit :
>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>> Arf ! A goto !
> 
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?

C doesn't pretend to be anything else than a portable and a bit 
higher-level assembly. Nothing like FT.


From salgerman at gmail.com  Tue May 13 06:06:09 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 03:06:09 -0700 (PDT)
Subject: where to get McMillan Installer?
Message-ID: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>

There does not seem to be a valid url for the Installer, anywhere.
Could anyone provide me with a copy of it?

many thanks.


From swapsun at gmail.com  Wed May  7 09:02:29 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 06:02:29 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
	<a5fda5c5-6389-4d05-b9e0-39a303cadbb3@e53g2000hsa.googlegroups.com>
Message-ID: <15d5d855-e99d-4005-9830-7109d7908ab4@k10g2000prm.googlegroups.com>

On May 7, 8:42?am, Thomas Woelz <two... at gmail.com> wrote:
> On 7 maio, 09:25, swap... at gmail.com wrote:
>
> > Any idea why the following program does not work? I was learning IO on
> > Python and the following generates a TypeError: range() integer end
> > argument expected, got str.
> > I am a beginner.
>
> > ################################
> > # print input name (str k), j times using raw_input
>
> > def hello():
> > ? ? j=raw_input("Please type in the number of times you want to print
> > ")
> > ? ? k=raw_input("Please type in your name ")
>
> ? ? # add this:
> ? ? j = int(j)
>
> > ? ? printname(j,k)
>
> > def printname(j,k):
> > ? ? ? ? ? for i in range(j):
> > ? ? ? ? ? ? ? ? print ("Hello %s" % k)
> > ################################
>
> theres too much whitespace in the printname function, try to stick
> with 4 spaces (and no tabs) for each block

Thanks very much for the advice. Will follow...


From deets at nospam.web.de  Mon May 19 05:58:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 11:58:23 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
Message-ID: <69d1b2F31b7u7U1@mid.uni-berlin.de>

> 
> That by itself is not enough, the method could be inherited; one should
> walk the base classes in the MRO to find the right one. And deal with
> classmethods and staticmethods. And decorators that don't preserve meta
> information... Hmmm, I think it isn't so trivial as it seems.

You might even have an instance-unique method. But I think the OP is
satisfied with a 90%-solution.

Diez


From tarun.kap at gmail.com  Fri May  2 16:26:58 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 13:26:58 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
Message-ID: <7334e775-e9c2-473f-96b5-138efaf9bf5b@x35g2000hsb.googlegroups.com>

On May 2, 2:49 pm, Jeff <jeffo... at gmail.com> wrote:
> The generally used idiom for that is:
>
> lst = ['a', 'b', 'c']
> if 'a' in lst:
>   foo = lst.index('a')

Jeff - Gracias !!

I am fairly new to python. Thanks for the example code snippet above.
It is the same amount of code as receiving -1 and then checking for
doing an "if else" for -1 so now i don't feel bad. But, being new to
this paradigm, raising of an exception when it can't find the element
appears to be weird to me for some unexplainable reason.


From bruno.desthuilliers at gmail.com  Thu May 22 14:43:09 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 22 May 2008 11:43:09 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <6898aed7-cae0-4116-b60b-b6015daef4bf@f63g2000hsf.googlegroups.com>

On 22 mai, 18:14, cm_gui <cmg... at gmail.com> wrote:
> Python is slow.

Oh, a troll...

>   Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Err, a very bad troll actually. Trop gros, passera pas.


From fepeacock at googlemail.com  Sat May 24 06:53:04 2008
From: fepeacock at googlemail.com (fepeacock at googlemail.com)
Date: Sat, 24 May 2008 03:53:04 -0700 (PDT)
Subject: Partial download with ftplib and retrbinary
Message-ID: <9dd32f80-ce21-4c2c-8eba-1afd3b80379f@x41g2000hsb.googlegroups.com>

I am breaking/interrupting my connection with the ftp server at
present when doing a partial download of a file. I have a callback
with retrbinary that raises an exception and ends the download. The
problem is that the server is not notified and hangs. I cannot send
any further commands and need to relogin to download further. Is there
a way to still continue downloading without having to login again.

My retrbinary function is:

ftp.retrbinary('RETR '+file, handleDownload,1,bound[0])

where bound[0] is an integer specifying the start byte of the
download.

My callback is:

def handleDownload(block):
    global count,localfile,number
    localfile.write(block)
    if count==number:
            raise(Exception)
    count=count+1

where number specifies the number of bytes to download.

Help would be gratefully received.


From python at bdurham.com  Sun May 25 09:20:16 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sun, 25 May 2008 09:20:16 -0400
Subject: Coverage checker: Coverage.py or pycover or ?
Message-ID: <1211721616.16886.1254972999@webmail.messagingengine.com>

Looking for feedback from people using a coverage checking utility. I've
found two - wondering if there's any feature that would recommend one of
these utilities vs. another (or argue for the use of both utilities).

Coverage.py
http://nedbatchelder.com/code/modules/coverage.html

and

Pycover
http://www.geocities.com/drew_csillag/pycover.html

Thanks,
Malcolm


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 05:29:48 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 11:29:48 +0200
Subject: Classmethods are evil
In-Reply-To: <g0llbe$2k6o$1@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <4831488c$0$10799$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
 >
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

Plain functions don't give you polymorphic dispatch and can't be 
overriden. Using metaclass methods requires a custom metaclass, which 1/ 
adds boilerplate code and cognitive load and 2/may bring problems, 
specially wrt/ MI.

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.

May I remind you that every name defined at the top-level of a class 
statement becomes a class attribute ?

Anyway : most of the use case I've had so far for classmethods required 
collaboration between the instance and the class, and I definitively 
prefer to have related functionalities defined in one place.

> 2. They are slower than metaclass methods or plain functions.

Slower than plain functions, indeed - but so are instancemethods. Slower 
that metaclass methods ? I never benchmarked this, but I don't see any 
reason that should be the case. Anyway, you could also argue that 
properties are slower than plain attributes, which are slower than local 
vars etc...

> I really want to hear your opinions on the subject.


Mine is that classmethods are a GoodThing that make simple thing easy.



From martin at v.loewis.de  Fri May 23 16:00:30 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 23 May 2008 22:00:30 +0200
Subject: Reloading function obtained via 'from xxx import yyy'
In-Reply-To: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <4837225e$0$5507$9b622d9e@news.freenet.de>

> ...and I'd like to reload testFunc.  How do I do so?  'from test import 
> testFunc' keeps the old definition around, and 'reload test' of course doesn't 
> work becayse I didn't use 'import test' in the first place.

Try all three of them, in sequence:

import test
reload(test)
from test import testFunc
del test

If you absolutely don't want to import test, write

reload(sys.modules['test'])
from test import testFunc

OTOH, if you reload often, consider not using from-import at all.

Regards,
Martin


From roy at panix.com  Sat May  3 16:11:08 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 03 May 2008 16:11:08 -0400
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
	<roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>
	<81e98a78-bc50-4800-981d-908bf14305bb@z72g2000hsb.googlegroups.com>
Message-ID: <roy-ECFEBB.16110803052008@70-1-84-166.area1.spcsdns.net>

In article "Giampaolo Rodola'" <gnewsg at gmail.com> wrote:

> I would be very interested in taking a look at how you implemented
> that part of code. Would it be possible?

Sadly, no.  It's proprietary code.  But, it's really not that complicated 
to reconstruct, once you know the basic idea.  You have a DualSocket class 
whose constructor creates two sockets.  It exposes (roughly) the same 
interface as a socket object, but decides which underlying 
protocol-specific socket to delegate to based on the address family of the 
sockaddr you give it.

Oh, yeah, this was done in C++, but there's nothing really that's language 
specific in the implementation.


From mail.ilocke at gmail.com  Fri May  9 07:46:00 2008
From: mail.ilocke at gmail.com (ivan)
Date: Fri, 9 May 2008 04:46:00 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <2702e944-47ce-4c8e-a674-61d92e2597c7@a23g2000hsc.googlegroups.com>

Not related (except that it is about python and ArcGIS): Remember you
can set PYTHONINSPECT to enter interactive mode at the end of a
script. With a script set as an ArcGIS tool, you can then enter
interactive to play around or debug with all the ArcGIS stuff loaded.

Is there a better way people do this?

Ivan


From duncan.booth at invalid.invalid  Thu May 22 04:33:42 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 08:33:42 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
	<87ej7voao9.fsf@physik.rwth-aachen.de>
Message-ID: <Xns9AA6609349A5Bduncanbooth@127.0.0.1>

Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:

>>>>      Read data from "input.txt".
>>>>      If data is an error then go to ...
>>>
>>> Arf ! A goto !
>>
>> You are surely aware of the fact that the C source of python also uses
>> goto at tons of places. Is that Arf! too?
> 
> In the hands of a skilled person who really knows what he/she does,
> it can be a useful statement.  But this collides with the goals of
> FT, which claims to be simple to use.  Besides, the above use case
> for a goto is definitively awful.
> 

My problem with the code isn't so much the 'go to', its the idea that you 
have to check the result of the read. That implies that any unchecked 
errors will go undetected. Ick.

-- 
Duncan Booth http://kupuguy.blogspot.com


From spdegabrielle at gmail.com  Thu May  1 18:15:32 2008
From: spdegabrielle at gmail.com (spdegabrielle)
Date: Thu, 1 May 2008 15:15:32 -0700 (PDT)
Subject: pil:effbot and pythonware offline
Message-ID: <8a2150b5-dfbf-419b-af10-af88932584ff@8g2000hse.googlegroups.com>

Sorry, I'm new to python and was trying to get imageTK;
this led me to try find PIL, but pythonware and effbot both seem to be
offline.

I can't find any mention of an outage on python.org, this newsgroup,
or the planet-blogs.

Is it just me? and does anyone know where I can find ImageTK?

Cheers,

stephen


From bockman at virgilio.it  Tue May 27 13:46:08 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Tue, 27 May 2008 19:46:08 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <pan.2008.05.27.17.46.08.159260@virgilio.it>

On Tue, 27 May 2008 01:31:35 -0700, Alex Gusarov wrote:

> Hello, I have strong .NET background with C# and want to do some
> familiar things from it with Python, but don't know how. For example,
> I created form in qt designer with QCalendarWidget, translated it into
> Python module and want to overload virtual method paintCell of
> QCalendarWidget. In C# I can write following (abstract) code:
> 
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
> 
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }
> 
> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's
> long and I must create additional class). The only thing I done its
> full replacement of handler:
> 
> calendar.paintCell = myPaintCell
> 
> def myPaintCell(self):
>     pass
> 

It is more a matter of the GUI toolkit you are using rather than the
language. In Python, they are many, but they are not as tighty integrated
with the language as in C#. Also, Python has a no standard support for
event handling, but again several non-standard library (e.g. twisted ) and
plus you can relatively easily cook your own recipe, has other posters
have shown you.

Anyway, IIRC (it's a long time since I used Qt), QT allows to connect 
 more than one slot with the same signal, so you should not need to
subclass or to create your own multi-dispatcher. Just doing:

calendar.paintCell.signal( SOME_SIGNAL_NAME, my_paint_method ) 

should work. I don't know which signal you should connect to, however.

This link gives you some detail on signal/slots in PyQT:

http://www.commandprompt.com/community/pyqt/x1408

Ciao
-----
FB


From python at bdurham.com  Tue May 20 16:01:55 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 20 May 2008 16:01:55 -0400
Subject: List of disk drives on Windows?
In-Reply-To: <aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>
References: <2008052013180816807-bob@passcalnmtedu>
	<aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>
Message-ID: <1211313715.3431.1254212467@webmail.messagingengine.com>

Mensanator,

<snip>
>>> import os.path
>>> dl = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
>>> drives = ['%s:' % d for d in dl if os.path.exists('%s:' % d)]
>>> drives
</snip>

Very clever!

Malcolm


From robert.kern at gmail.com  Mon May  5 13:21:49 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 05 May 2008 12:21:49 -0500
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <fvnfni$qjl$1@ger.gmane.org>

Gabriel Genellina wrote:
> Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement. But if you know that you're adding floating point numbers you can use whatever algorithm best fits you. Or use numpy arrays; I think they implement Kahan summation or a similar algorithm.

No, we do a straightforward sum, too. Less magic in the default case.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From ggpolo at gmail.com  Sat May 10 08:27:46 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 09:27:46 -0300
Subject: People still using Tkinter?
In-Reply-To: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
Message-ID: <ac2200130805100527g384a808p65cbf31b9f0eb96b@mail.gmail.com>

2008/5/10 Kenneth McDonald <kenneth.m.mcdonald at sbcglobal.net>:
> Any guesses as to how many people are still using Tkinter? And can anyone
> direct me to good, current docs for Tkinter?
>

I will say no to the first question.

Now about the second question.. there are these links you may find interesting:

"An Introduction to Tkinter" --
http://www.pythonware.com/library/tkinter/introduction/index.htm
"Tkinter reference: a GUI for Python" --
http://infohost.nmt.edu/tcc/help/pubs/tkinter/index.html

There is also a book, http://www.manning.com/grayson/ and a wiki,
http://tkinter.unpythonic.net/wiki/
Also, stdlib docs at http://docs.python.org/lib/module-Tkinter.html

And there is a mail list too.

> Thanks,
> Ken
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
-- Guilherme H. Polo Goncalves


From tarun.kap at gmail.com  Thu May 22 14:38:05 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Thu, 22 May 2008 11:38:05 -0700 (PDT)
Subject: 2 different versions of python compiling files.
Message-ID: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>

I am trying to upgrade from python 2.3 to 2.4 but not all machines can
be upgraded. Can you guys tell me if this scenario is possible.

1. Any machine that uses .py files that use libraries that require 2.4
will have 2.4 on it.
2. rest of the machines will have 2.3

now there is a shared drive. lets say i write a new library called
testlib.py and put it on the shared drive .. when a script uses it
from a 2.4 based machine, it will generate a testlib.pyc and leave it
on the shared drive. going forward that .pyc is used until the
original lib is changed. now lets say a 2.3 based machine is trying to
use that lib. it will try to use that pyc file which was compiled by
py2.4. will it work or crash ?

not sure if i did a good job on explaining my scenario.


From martin at v.loewis.de  Sun May 25 04:07:57 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 10:07:57 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <g19q1l$pd5$01$1@news.t-online.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
Message-ID: <48391E5D.5050106@v.loewis.de>

> I guess, Apache does some kind of memory caching for files, which are often
> requested and small enough to fit into the system memory. 

Are you sure about this? I could not find anything in the documentation
(other than mod_cache and friends, which is an unrelated functionality).
Also, I don't see the need for Apache to cache frequently requested
files itself. Instead, the operating system will cache frequently
requested directories and files in memory, and it will do the same for
a Python web server.

Regards,
Martin


From http  Tue May  6 15:02:21 2008
From: http (Paul Rubin)
Date: 06 May 2008 12:02:21 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <7xprrz2r42.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
vivainio at gmail.com (Ville M. Vainio) writes:
> I don't think BSD/MIT like license really annoys anyone. Think python
> here ;-)

Python's non-GPL license certainly is annoying to some of us.


From workitharder at gmail.com  Sat May 24 02:01:10 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:01:10 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
	<87mymgb8hn.fsf@benfinney.id.au>
	<5def9628-1332-4c18-b123-e5eef1a810d1@t54g2000hsg.googlegroups.com>
Message-ID: <7f1595a7-0417-448d-9422-9e9edaba97b9@p39g2000prm.googlegroups.com>

On May 23, 10:18?pm, notnorweg... at yahoo.se wrote:
> On 24 Maj, 07:01, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
>
>
> > notnorweg... at yahoo.se writes:
> > > On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > > wrote:
> > > > Can you tell us exactly which programs you mean when you say "the
> > > > shell" and "the commandprompt"?
>
> > > commandprompt = windows dos-windows
>
> > > shell = standard python interactive prompt
>
> > Thanks.
>
> > Be aware that referring to "the shell" without further qualification
> > is usually understood to mean "the operating system shell", i.e. the
> > command shell provided for running operating system commands.
>
> > So, you're asking about the difference in behaviour between "the
> > Windows command shell" versus "the Python interactive shell".
>
> > --
> > ?\ ? ? ? ??I cannot conceive that anybody will require multiplications |
> > ? `\ ? ? ? ? ?at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
> > _o__) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Wales, 1936 |
> > Ben Finney
>
> yes

There's also the IDLE interactive shell, which is definitely slower,
and I suspect this is what he's talking about. If you run 'python.exe'
from the windows C: prompt is it still slow?


From geoldr at gmail.com  Thu May 22 14:38:05 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 11:38:05 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com>
Message-ID: <26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com>

On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > Hello all, I have written a simple program, and at the end of it,
> > instead of it closing I would like it to restart from the beggining.
> > Is there a way to do this? Put my code into a class function, or
> > something?
> > I guess I could do a while loop, but I think if there is a way to run
> > my code if it's in a class would be an easier option. I can't seem to
> > find many guides online but maybe I have not been looking in the right
> > places.
>
> > Anybody have any ideas?
>
> Putting your code in a function or class is probably the way to go.
> When I was doing C++, we'd just use a while loop for simple stuff,
> though.
>
> It really shouldn't be all that hard to tell the code to call up the
> beginning of the program again.
>
> Mike

That's what I am trying to figure out, but it doesn't seem to work. Do
you have any example code of classes/functions that work for you?


From tdahsu at gmail.com  Thu May 22 14:03:48 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Thu, 22 May 2008 11:03:48 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
	<e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>
Message-ID: <46a05430-18c9-4383-a22f-2006036842dd@d45g2000hsc.googlegroups.com>

On May 21, 11:41?am, tda... at gmail.com wrote:
> On May 21, 11:13?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-21, tda... at gmail.com <tda... at gmail.com> wrote:
>
> > > I'd appreciate any help. ?I've got a list of files in a directory, and
> > > I'd like to iterate through that list and process each one. ?Rather
> > > than do that serially, I was thinking I should start five threads and
> > > process five files at a time.
>
> > > Is this a good idea? ?I picked the number five at random... I was
>
> > Depends what you are doing.
> > If you are mainly reading/writing files, there is not much to gain, since 1
> > process will already push the disk IO system to its limit. If you do a lot of
> > processing, then more threads than the number of processors is not much use. If
> > you have more 'burtsy' behavior (first do lot of reading, then lot of
> > processing, then again reading, etc), then the system may be able to do some
> > scheduling and keep both the processors and the file system busy.
>
> > I cannot really give you advice on threading, I have never done that. You may
> > want to consider an alternative, namely multi-tasking at OS level. If you can
> > easily split the files over a number of OS processes (written in Python), you
> > can make the Python program really simple, and let the OS handle the
> > task-switching between the programs.
>
> > Sincerely,
> > Albert
>
> Albert,
>
> Thanks for your response - I appreciate your time!
>
> I am mainly reading and writing files, so it seems like it might not
> be a good idea. ?What if I read the whole file into memory first, and
> operate on it there? ?They are not large files...
>
> Either way, I'd hope that someone might respond with an example, as
> then I could test and see which is faster!
>
> Thanks again.

Ah, well, I didn't get any other responses, but here's what I've done:

loopCount = 0
                for l in range(len(self.filesToProcess)):
                    threads = []
                    try:
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+l])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+2])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+3])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+4])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+5])))
                        msg = "Processing file...\n"
                        for thread in threads:
                            wx.CallAfter(self.textctrl03.write(msg),
thread.start())
                        for thread in threads:
                            thread.join()
                        loopCount += 5
                    except IndexError:
                        pass

It works, and it works well.  It starts five threads, and processes
five files at a time.  (In the "self.processFiles" I read the whole
file into memory using readlines(), which works well.)

Of course, now the wx.CallAfter function doesn't work... I get
"TypeError: 'NoneType' object is not callable" for every time it is
run...


From asdf at asdf.com  Wed May 28 18:20:10 2008
From: asdf at asdf.com (asdf)
Date: 28 May 2008 22:20:10 GMT
Subject: Python's tail -f implementation for remote files
Message-ID: <483dda9a$0$11598$607ed4bc@cv.net>

Basically what i want to do is to read a file
that is being constantly appended to but which
is located on a remote server.
I found this for doing BASH's tail -f in python:

import os
tailoutputfile = os.popen('tail -f syslog')
while 1:
    line = tailoutputfile.readline()
    if len(line)==0:   # change the termination condition 
        break
    process_line(line)

and it works great. But not sure how to use this with
ssh command to connect to remote machine.

Any tips?


From miller.paul.w at gmail.com  Sun May 25 22:50:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:50:39 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>

On May 24, 9:41?am, Sh4wn <luckyluk... at gmail.com> wrote:


> Python advertises himself as a full OOP language, but why does it miss
> one of the basic principles of OOP? Will it ever be added to python?

Others have already answered this directly, but I'd like to mention
that languages I know of which have this feature also have a feature
for getting around it.  (e.g. C++ and friend classes) I don't know
about you, but I don't want features in the language that make me want
to circumvent them. Do you?


From vivainio at gmail.com  Wed May  7 03:46:37 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Wed, 7 May 2008 00:46:37 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<232ee177-a5c9-488f-921e-cd6ecb5ff3ed@b1g2000hsg.googlegroups.com>
Message-ID: <5f383446-4a77-4a3c-933e-bedc538dc495@b1g2000hsg.googlegroups.com>

On May 6, 11:27 pm, hdante <hda... at gmail.com> wrote:

>  GPL can mix with other free software licenses, so people who write
> BSD code and do not wish to remain BSD clean are free to use GPL'd
> code. That's the important point.

No, it can't. It can only mix through aggregation, i.e. you can ship a
GPL'd "plugin" with BSD code as long as you don't import the plugin
directly.

Here's a real life example from ipython:

- Core IPython is BSD clean, and we intend to leave it that way
- If we imported a gpl'd module in some core ipython component, the
core component would be gpl (or something equally restrictive) as
well, through viral nature of the license
- Now, if you want a BSD-clean version of ipython (say, to embed it in
a commercial program - with which I have absolutely *no* problem, and
can only see good things coming from it), you would have to gleam out
all the uses of that module from the source code. Not very fun, esp.
if it's something important
- There is a GPL'd module in "extensions" folder of IPython, ipy_bzr
(that is because of bzrlib). It's never imported anywhere in ipython
source code, but the user can import it in ipy_user_conf.py. This
"contaminates" the config file and subsequently ipython (because it's
imported into python interpreter ipython is running on), but luckily
the user can opt out from importing it if he wishes to remain BSD
clean. Or he can delete the file altogether if he wishes.

Without GPL, none of this hair-splitting is necessary.

I guess I could have gone the Carl Banks route and just say "It scares
away some people". Consider my replies here an elaborate way of saying
the very same thing.


From yxs046 at gmail.com  Sun May 11 22:48:50 2008
From: yxs046 at gmail.com (yxs046 at gmail.com)
Date: Sun, 11 May 2008 19:48:50 -0700 (PDT)
Subject: Corum Bubble Diamond Steel Pink Ladies Watch 196-151-47-0F08-PN96S
Message-ID: <9ce075f4-900c-4409-9a9c-98f646f5dba9@i36g2000prf.googlegroups.com>

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Item Variations :           196-151-47-0F08-PN96S, 196151470F08PN96S,
Corum-196-151-47-0F08-PN96S
Movement :        Quartz
Bezel :           Diamond
Case Material :    Stainless Steel
Case Diameter :   35.5mm
Dial Color :           Pink Mother-of-pearl
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pearl Dial. Diamond Bezel. Push Button Deployment Clasp. Domed Scratch
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Corum Bubble Diamond Steel Black Ladies Watch 196-151-47-0F01-PN94S :
http://corum.hotwatch.org/Corum-Ladies-Watch-196-151-47-0F01-PN94S.html

Corum Bubble Diamond Steel Black Ladies Watch 196-151-47-0F01-PN94R :
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From grante at visi.com  Sat May 24 12:36:36 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 24 May 2008 11:36:36 -0500
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <78ydnZ2UHo2J2aXVnZ2dnUVZ_jOdnZ2d@posted.visi>

On 2008-05-23, Johannes Bauer <dfnsonfsduifb at gmx.de> wrote:

> I'm just starting with Python and am extremely unexperienced with it so 
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> 	printf("%d\n", q);
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> 	print p
>
> However, this "assignment and comparison" is not working. What's the 
> "Python way" of doing this kind of thing?

  p = myfunction()
  if p:
    print p    

In Python, assignment isn't an operator, it's a statement.  The
condition in an if/while has to be an expression, not a
statement.

-- 
Grant



From paul.hankin at gmail.com  Wed May 28 06:46:57 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 28 May 2008 03:46:57 -0700 (PDT)
Subject: A quick question
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <d261cbbd-f971-42ca-b1a3-e4a246f6df77@j22g2000hsf.googlegroups.com>

On May 28, 11:25 am, "James" <cobro... at msn.com> wrote:
> word = raw_input("Type a word:")
> start = len(word)
>
> for letter in range(start, 0, -1):
>     print letter

Hi James,

for letter in reversed(word):
    print letter

--
Paul Hankin


From ivlenin at gmail.com  Sun May 25 16:07:15 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 20:07:15 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<mailman.1569.1211731554.12834.python-list@python.org>
Message-ID: <TFj_j.4171$mh5.785@nlpi067.nbdc.sbc.com>

On Sun, 25 May 2008 13:05:31 -0300, Gabriel Genellina wrote:
> Use a list, and the bisect module to keep it sorted:

That's worth doing if you need the data to be sorted after each insert. 
If the OP just needs the data to be sorted at the end, using a data 
structure with fast inserts (like a set) and then sorting at the end will 
likely be faster.


From kerstin.viltersten at semcon.com  Tue May 27 07:58:08 2008
From: kerstin.viltersten at semcon.com (Giraffe)
Date: Tue, 27 May 2008 04:58:08 -0700 (PDT)
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
	<g1gm5p$l5k$03$1@news.t-online.com>
Message-ID: <c129a3be-d34b-4a94-8cdf-71ddeb18d57a@p25g2000hsf.googlegroups.com>

> You probably start idle with the -n option. ...

> ?        ...If your code has been modified, you must reload() the affected
>          modules and re-import any specific items (e.g. from foo import baz)
>          if the changes are to take effect...

> If you use a shortcut to start IDLE, remove the -n option and you should be
> OK.

Thanks! I?ll try that!



From s0suk3 at gmail.com  Tue May 20 14:01:24 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 11:01:24 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<027e0bd9$0$26878$c3e8da3@news.astraweb.com>
Message-ID: <3df3897e-f75e-4447-9142-398763f10c2f@56g2000hsm.googlegroups.com>

On May 20, 12:22 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> "Paul McGuire" <pt... at austin.rr.com> wrote in message
>
> news:b56a93ee-b177-44fb-927a-1e204f491639 at t54g2000hsg.googlegroups.com...
> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
> > def compress(s):
> > return list(set(s))
>
> > That does the trick.
>
> Wow, I just *knew* there had to be some built-in function that would make
> this problem trivial! :)
>
> Only if order does not need to be maintained.  list(set(s)) will not
> necessarily keep the unique characters in the order they are seen.
> We'll have to check with the OP to see if this is important (I just
> assumed that it was because of the use of list comps).
>
> Good point. For me it doesn't matter because it wasn't my problem
> originally. I just had a question about the list comp. But if order matters,
> then I guess set doesn't work?

Yeah, it doesn't work. I didn't know that detail about sets until now
(like dicts, you can't expect the order to remain the same). I also
forgot that you were joining the list, so the return statement would
have looked like "return ''.join(set(s))", but you have to go with the
list comprehension if you want it to keep the same order.


From pydev at rscorp.ab.ca  Thu May  1 10:44:27 2008
From: pydev at rscorp.ab.ca (Scott SA)
Date: Thu,  1 May 2008 08:44:27 -0600
Subject: Signals/Slots support in Python
Message-ID: <r02010500-1049-1A0CE734178D11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Brian Vanderburg II (BrianVanderburg2 at aim.com) wrote:

>I don't know if any such support is already built in, so I ended up 
>making my own simple signals/slots like mechanism.  If anyone is 
>interested then here it is, along with a simple test.  It can connect to 
>normal functions as well as instance methods.  It also supports weak 
>connections where when an object is gone, the slot is gone as well, the 
>slot just holds a weak reference to the object.

Did you review this?
    <http://pydispatcher.sourceforge.net/>

from what I understand is originally based upon this:
    <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87056>

and subsequently integrated into this:
    <http://djangoproject.com>

>-----
># Begin Signal
>import weakref
>import random
>
>class Signal:
>    class Slot:
>        def __init__(self, fn):
>            self.__fn = fn
>
>        def __call__(self, accum, *args, **kwargs):
>            result = self.__fn(*args, **kwargs)
>            return accum(result)
>
>    class WeakSlot:
>        def __init__(self, conn, parent, fn, obj):
>            self.__conn = conn
>            # Avoid circular references so deleting a signal will
>            # allow deletion of the signal since the slot doesn't ref
>            # back to it but only weakefs back to it
>            self.__parent = weakref.ref(parent)
>            
>            self.__fn = fn
>            self.__obj = weakref.ref(obj, self.Cleanup)
>
>        def __call__(self, accum, *args, **kwargs):
>            obj = self.__obj()
>            if obj is None:
>                return True
>                    
>            result = self.__fn(obj, *args, **kwargs)
>            return accum(result)
>
>        def Cleanup(self, ref):
>            parent = self.__parent()
>            if parent is not None:
>                parent.Disconnect(self.__conn)
>            
>    class Accumulator:
>        def __call__(self, *args, **kwargs):
>            return True
>            
>        def Finalize(self):
>            return None
>
>    def __init__(self):
>        self.__slots = [ ]
>        
>    # This connects a signal to a slot, but stores a strong reference so
>    # The object will not be deleted as long as the signal is connected
>    def Connect(self, fn):
>        conn = self.NewConn()
>        self.__slots.append([conn, Signal.Slot(fn)])
>        return conn
>        
>    # This connects a signal to a slot, but store a weak reference so
>    # when the object is gone the slot will not be called.  Because of
>    # the implemenations, it is not possible to do WeakConnect(obj.Fn),
>    # since obj.Fn is a new object and would go to 0 refcount soon after
>    # the call to WeakConnect completes.  Instead we must do a call as
>    # WeakConnect(ObjClass.Fn, obj)
>    # Only the object is weak-referenced.  The function object is still
>    # a normal reference, this ensures that as long as the object exists
>    # the function will also exist.  When the object dies, the slot will
>    # be removed
>    def WeakConnect(self, fn, obj):
>        conn = self.NewConn()
>        self.__slots.append([conn, Signal.WeakSlot(conn, self, fn, obj)])
>        return conn
>        
>    # Disconnect a slot
>    def Disconnect(self, conn):
>        result = self.Find(conn)
>        if result >= 0:
>            del self.__slots[result]
>            
>    # Disconnect all slots
>    def DisconnectAll(self):
>        self.__slots = [ ]
>        
>    # Create an accumulator.  Accumulator will be called as a callable
>    # for each return value of the executed slots.  Execution of slots
>    # continues as long as the reutrn value of the accumulator call is
>    # True.  The 'Finalize'function will be called to get the result
>    # A custom accumulator can be created by deriving from Signal and
>    # Creating a custom 'Accumulator' class, or by deriving from Singal
>    # and creating CreateAccumulator
>    def CreateAccumulator(self):
>        return self.Accumulator()
>
>    # Execute the slots
>    def __call__(self, *args, **kwargs):
>        accum = self.CreateAccumulator()
>        for conn in xrange(len(self.__slots)):
>            if not self.__slots[conn][1](accum, *args, **kwargs):
>                break
>        return accum.Finalize()
>            
>    # Create a connection name
>    def NewConn(self):
>        value = 0
>        while self.Find(value) >= 0:
>            value = random.randint(1, 100000000)
>        return value
>        
>    def Find(self, conn):
>        for i in xrange(len(self.__slots)):
>            if self.__slots[i][0] == conn:
>                return i
>                
>        return -1
>
># End Signal
>
>def fn1():
>    print "Hello World"
>    
>def fn2():
>    print "Goodbye Space"
>    
>class O:
>    def __init__(self, value):
>        self.value = value
>        
>    def Action(self):
>        print "O %d" % self.value
>        
>a = Signal()
>
>a.Connect(fn1)
>a.Connect(fn2)
>
>print "Part 1"
>a()
>
>a.DisconnectAll()
>
>o1 = O(4)
>o2 = O(12)
>
>a.WeakConnect(O.Action, o1)
>a.Connect(o2.Action)
>
>print "Part 2"
>a()
>
>print "Part 3"
>o1 = None
>a()
>
>print "Part 4"
>o2 = None
>a()
>
>a.DisconnectAll()
>
>def f1():
>    print "Hello Neighbor"
>    
>def f2():
>    print "Back to Work"
>    
>c1 = a.Connect(f1)
>c2 = a.Connect(f2)
>
>print "Part 5"
>a()
>
>print "Part 6"
>a.Disconnect(c2)
>a()
>
>a.DisconnectAll()
>
>def f1(name):
>    print "Hello %s" % name
>    
>def f2(name):
>    print "Goodbye %s" % name
>    
>a.Connect(f1)
>a.Connect(f2)
>
>print "Part 7"
>#a() # Error
>a("Sarah")
>
>a.DisconnectAll()
>
>class MySignal(Signal):
>    class Accumulator:
>        def __init__(self):
>            self.value = 0
>        def __call__(self, value):
>            self.value += value
>            return bool(value != 0)
>        def Finalize(self):
>            return self.value
>            
>
>def f1(x):
>    return x * x
>    
>def f2(x):
>    return x + x
>    
>def f3(x):
>    return 0
>    
>a = MySignal()
>a.Connect(f1)
>a.Connect(f2)
>a.Connect(f3)
>
>print "Part 8"
>print a(5)
>
>
>-----
>--
>http://mail.python.org/mailman/listinfo/python-list


From ludwigbrinckmann at gmail.com  Sat May 10 17:08:36 2008
From: ludwigbrinckmann at gmail.com (Ludwig)
Date: Sat, 10 May 2008 22:08:36 +0100
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <3f7a6e1c0805101408j69f325c4mf1b3e480bc77ec2@mail.gmail.com>

This is not a bug, this is how it should work.

A triple quoted string ends only with another triple quoted string (which
can extend over multiple lines) In your example you are escaping the first
quote character at the end of the line, thus leaving just two quotes that do
not end the string.
Another """ (triple quote) will terminate the string.

HTH


2008/5/10 <wxPythoner at gmail.com>:

> If you are in the interactive prompt of the Python interpreter and you
> do this
>
> print """Testing\"""   or   print '''Testing\'''
>
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
>
> [1]+  Stopped                 python
>
>
> If you do
>
> print "Testing\"   or   print 'Testing\'
>
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bluepikes at gmail.com  Thu May  8 09:21:17 2008
From: bluepikes at gmail.com (Blue Pikes)
Date: Thu, 8 May 2008 06:21:17 -0700 (PDT)
Subject: Re-launch of The Gadgets Forum
Message-ID: <fda02090-71b9-42dd-8a83-8e783d39910b@i76g2000hsf.googlegroups.com>

Re-launch of The Gadgets Forum
------------------------------------------------

Re-launch of "The Gadgets Forum - gadgets.pk" with new and stunning
categories, now you can find latest news and reviews about the
following:

1) Audio/Video Gadgets = MP3 Players, iPods, Speakers, Audio/Video
Systems, Digital Cameras etc.

2) Automobile Gadgets

3) Cell Phones & Accessories

4) Laptops, Desktops & Accessories

5) Clocks & Watches

6) Gaming Gadgets

7) Geek Toys

8) GPS & Satellites

9) Home & Office Gadgets

10) Kitchen Gadgets

11) Solar Powered Gadgets

12) Travel & Power Gadgets


JOIN NOW  http://www.gadgets.pk



From alex.m.gusarov at gmail.com  Tue May 27 05:16:51 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 02:16:51 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>
Message-ID: <1997713b-6fc0-497b-ae66-e90626b6645a@m73g2000hsh.googlegroups.com>

>    class MyPaintCell(PaintCell):
>       def paintcell(self):
>           PaintCell.paintcell(self)
>           myPaintCell(self)
>
>    (hmm, only 4 lines, I overestimated the cost. Sorry)

Yeah, that's funny..

I don't want to do it 'cause I create my form within Designer and
simply drop Calendar widget to it. Then I need to translate it
into .py file, it's OK. But if I want to use a custom derived from
Calendar class instead of it, I need after every refreshing/
translating of form replace few lines in translated file.

I just want to know about existence of other method to do this in
class, that contain instance of Calendar.

By "this" I mean:
Instead of calling original method "paintcell" alone, call it with my
custom metod.

Anyway, thanks.


From info at thegrantinstitute.com  Fri May 16 15:33:19 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 16 May 2008 12:33:19 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080516123319.7C0372E8BB9F6650@thegrantinstitute.com>

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From hdante at gmail.com  Mon May 19 21:15:01 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:15:01 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>
Message-ID: <e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>

On May 19, 5:35?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > ?The situation would be simpler if there were good well-known toolkits
> > for optimization in python (like numpy for matrix operations), but
> > that's not the case.
>
> There's at least Psyco (if you're willing and able to restrict
> yourself from using some of the most dynamic parts of Python - which
> might not be a problem here). ?One could also mention stuff like Pyrex
> and Cython.

 I meant toolkits for "optimization problems", not "code
optimization".


From hat at se-162.se.wtb.tue.nl  Wed May  7 09:25:27 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 07 May 2008 15:25:27 +0200
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
	<3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com>
Message-ID: <slrng23be7.rpn.hat@se-162.se.wtb.tue.nl>

On 2008-05-07, Chris <cwitts at gmail.com> wrote:
>>>> os.chdir('C:\temp\my test')
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume
> label syntax is incorrect: 'C:\temp\\my test'

Python strings have \ escapes, such as \t, \n etc. Above you try to go to

C:<TAB>emp\my test

and you are lucky that \m is not something special.


Either escape your back slashes ("C:\\temp\\my test") or use raw strings
(r"C:\temp\my test").

Sincerely,
Albert


From castironpi at gmail.com  Wed May  7 09:49:36 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 06:49:36 -0700 (PDT)
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1> 
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1> 
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
	<Xns9A97897C78229duncanbooth@127.0.0.1> 
	<tohUj.34582$o06.12139@tornado.fastwebnet.it>
Message-ID: <051da660-6b78-410a-9cbf-b8d616384ce0@a70g2000hsh.googlegroups.com>

On May 7, 7:37?am, Marco Mariani <ma... at sferacarta.com> wrote:
> Duncan Booth wrote:
> > Perhaps if you'd copied all of my code (including the decorator that was
> > the whole point of it)...
>
> Sure, I missed the point. Python's > symbols become quoting levels and
> mess up messages.
>
> Anyway, I would loathe to start execution of a generator before starting
> to iterate through it. Especially when generators are passed around.
> The current behavior makes perfect sense.

Question:

>>> def f( ):
...     print 0
...     while 1:
...             yield 1
...
>>> g= f( )
>>> g.next( )
0
1
>>> g.next( )
1
>>> g.next( )
1

This might fit the bill:

>>> def dropfirst( h ):
...     h.next( )
...     return h
...
>>> g= dropfirst( f( ) )
0
>>> g.next( )
1
>>> g.next( )
1
>>> g.next( )
1

However as dropfirst is dropping a value, both caller -and- cally have
to designate a/the exception.  Hold generators are better "first-
dropped", and you hold 'next' inherently causes side effects.  @greedy
(from earlier) frees the caller of a responsibility/obligation.

What can follow without a lead?

The definitions may lean harder on the 'generation' as prior to the
'next': generators inherently don't cause side effects.

Or hold, first-dropped is no exception:

>>> special= object( )
>>> def f( ):
...     print 0
...     yield special
...     while 1:
...             yield 1
...
>>> g= f( )
>>> g.next( )
0
<object object at 0x00980470>
>>> g.next( )
1
>>> g.next( )
1
>>> g.next( )
1


From dullrich at sprynet.com  Mon May 19 13:51:12 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 19 May 2008 12:51:12 -0500
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
Message-ID: <1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>

On Mon, 19 May 2008 02:59:22 -0700 (PDT), sandeep
<shiningsandy at gmail.com> wrote:

>
>hi
>the py code that i have written is here.when i run this code i wont
>get any errors it just works fine for me.but when i created the exe i
>start getting an error in my 'getMailContent' function. The error
>description is
>
>TypeError:unsupported operand type(s) for :- 'instance' and 'int'

Are you and py2exe using the same version of Python?
(Make something in the exe that displays sys.version...)

>i dont know why i am start getting this error when i run it through
>the exe.
>
>
>import win32com,win32com.client
>import os,os.path
>import codecs
>import zipfile
>
>#@Author:::Sandeep Kumar Sharma
>
>#outlook application refrence
>outlook_app=0
>#outlook ids to access different folders look into msdn for more info.
>not a preffered way as i am hardcoding data here
>OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
>19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
>16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
>23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
>4,'olFolderSentMail':5,'olFolderServerFailures':
>22,'olFolderSyncIssues':20,'olFolderTasks':
>13,'olPublicFoldersAllPublicFolders':18}
>#outlook types to save mailItem look into msdn for more info
>#although doesnot work for me :-(
>OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
>4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};
>
>#refrence to content in inbox
>inbox_obj=0
>
>#function which will initialise outlook and return its reference
>def getAppRef():
>    temp=win32com.client.Dispatch("OutLook.Application")
>    return temp.GetNamespace("MAPI")
>
>#function to return the folders in the outlook
>def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
>    return a.GetDefaultFolder(b)
>
>#function to get email content
>def getMailContent(obj):
>    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
>    for kk in range(len(obj.Items),1,-1):
>    #for kk in range(len(obj.Items-1),0,-1):
>        #print 'hello'
>        print 'writting file='+str(kk)
>        mailItem=obj.Items[kk]
>        writeData(mailItem,txt_file)
>
>        #print mailItem.OlSaveAsType.olMSG
>        #saveCopy(mailItem)
>        #print "sender="+mailItem.SenderName+'
>SenderEmailId='+str(mailItem.SenderEmailAddress)+'
>Time='+str(mailItem.ReceivedTime)
>        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)
>
>    txt_file.close()
>    '''
>    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
>    file_zip.write('data.log')
>    file_zip.close()
>    '''
>
>#function to create a directory
>#obviously not a best way :-( but i think can expected this sort of
>mistakes from beginners
>def createDir():
>    path=os.path.abspath("\email")
>    if(os.path.exists(path)):
>        print "Directory already exists"
>    else:
>        os.system("md "+path)
>
>#function to save a copy of email
>def writeData(mailItem,file):
>    data="<p>"
>    sender='<h4>SenderName</
>h4>'+checkStringType(mailItem.SenderName)
>    time='<br><h4>Time</
>h4>'+checkStringType(str(mailItem.ReceivedTime))
>    attachment='<br><h5>Attachments Count</
>h5>'+str(len(mailItem.Attachments))
>    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
>p><hr/>"
>    dataToWrite=data+sender+time+attachment+edata
>    getAttachmentInfo(mailItem.Attachments)
>    file.write(getHTMLString(dataToWrite))
>    #checkStringType(dataToWrite)
>
>def getAttachmentInfo(atmts):
>    for kk in range(1,len(atmts)):
>        atmt=atmts[kk]
>        #print "File Name="+atmt.FileName+'
>DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
>        abc=os.path.isdir(os.getcwd()+'\email')
>
>        if(abc==True):
>            print 'directory exists'
>
>        else:
>            os.mkdir(os.getcwd()+'\email')
>
>        path=os.path.abspath(os.getcwd()+'\email')
>        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)
>
>
>
># function to check whether the character encoding is ascii or smthing
>else
>def checkStringType(a):
>
>    if isinstance(a,str):
>       b='not a unicode string'
>
>    else:
>        a.encode('utf-8')
>        #print 'unicode type'
>
>    return a
>
>#function to save the coopy of an email
>#:-( but smhow it generate error whenever i make a call to it
>def saveCopy(mailItem):
>
>    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
>    print name
>    #global outlook_app
>    try:
>        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
>    except BaseException:
>        print BaseException
>
>def getHTMLString(b):
>    a='<html><head><title>Your Email Data log is here</title></
>head><body>'+b+'</body></html>'
>    return a
>
>#main entrance to the program
>def main():
>    global outlook_app,inbox_obj
>    outlook_app=getAppRef()
>    #print outlook_app.OlSaveAsType.olMSG
>    print '=================='
>    print dir(outlook_app)
>    print '=================='
>    inbox_obj=getOutLookFolders(outlook_app)
>    print dir(inbox_obj)
>    print (inbox_obj.Items)
>    #saveCopy(inbox_obj.Items[1])
>    getMailContent(inbox_obj)
>
>
>
>main()
>
>
>my setup file has this code
>
>from distutils.core import setup
>import py2exe
>
>setup(console=['outlook.py'])
>
>
>i have just copied and pasted it from the tutorial available at the
>py2exe site and changed the filename with mine filename.
>
>
>thanks and regards
>sandeep kumar sharma
>
>> There is nothing special in executables produced by py2exe. I mean
>> that the debugging strategy is as always. A good start might be in
>> adding logging\tracing facilities both to script and the executable.
>> Comparing two trace files could give you some clue.

David C. Ullrich


From parimala.kalavala at gmail.com  Mon May 26 05:57:38 2008
From: parimala.kalavala at gmail.com (PARIMALA KALAVALA)
Date: Mon, 26 May 2008 15:27:38 +0530
Subject: how to access run queue
Message-ID: <67eb1c790805260257y6a645267m9a4af055269ab101@mail.gmail.com>

Hello,

      I wanted to know how how to access the run queue or active queue from
userspace and how to check whether one process is preempting another process
in linux.

Thanks,

With regards
Parimala
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From tjreedy at udel.edu  Sat May 24 21:38:14 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 21:38:14 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org><roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net><mailman.1532.1211644302.12834.python-list@python.org><g19fv3$3vl$1@gide.ita.chalmers.se><18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<20080524164608.5a803201.darcy@druid.net>
Message-ID: <g1afu4$6tq$1@ger.gmane.org>


"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:20080524164608.5a803201.darcy at druid.net...
| > But once you track down problems like the above you can write more
| > unit tests to catch those exact bugs in the future. This is one case
| > where I do favour unit tests.
|
| Yes!  One of the biggest advantages to unit testing is that you never
| ever deliver the same bug to the client twice.  Delivering software
| with a bug is bad but delivering it with the same bug after it was
| reported and fixed is calamitous.

Writing a test for each code bug is now part of the Python maintenance 
procedure. 





From ivan.illarionov at gmail.com  Sun May 25 08:14:55 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 12:14:55 +0000 (UTC)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1bl7v$1id3$1@news.mtu.ru>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:

> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution is
> not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x'] funclist = [eval('lambda x:' +
>>>> func) for func in func_strings] len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False
> 
> 
> Thanks in advance
> 
> Martin

Maybe make a set of code objects?

func_code_set = set([f.func_code for f in funclist])

funclist = []
for fc in func_code_set:
    f = lambda x: x
    f.func_code = fc
    funclist.append(f)

-- Ivan


From p5secr2 at uni-jena.de  Mon May 19 10:45:51 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:45:51 +0200
Subject: scope of optional arguments
References: <g0s2v3$fa6$01$1@news.t-online.com>
	<mailman.1347.1211207922.12834.python-list@python.org>
Message-ID: <g0s3r6$eli$02$1@news.t-online.com>

Thank you very much for your fast and usefull response, Steven. Have a nice 
day. 




From hdante at gmail.com  Tue May  6 16:27:13 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 13:27:13 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
Message-ID: <232ee177-a5c9-488f-921e-cd6ecb5ff3ed@b1g2000hsg.googlegroups.com>

On May 5, 3:26?pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> "Zed A. Shaw" <zeds... at zedshaw.com> writes:
>
> > GPLv3?
>
> > How do people feel about Vellum's GPLv3 status? ?It actually doesn't
> > impact anyone unless you embed Vellum into a project/product or you
>
> Yeah, but it effectively prevents people from embedding it into their
> apps that wish to remain BSD/MIT clean.

 That's not a good argument. "GPL has the problem that if people don't
want to use GPL, then they can't use the GPL'd code."

 GPL can mix with other free software licenses, so people who write
BSD code and do not wish to remain BSD clean are free to use GPL'd
code. That's the important point.

>
> It's not likely that some evil corporation is going to hijack Vellum
> source code as a basis of their next evil app (which is basically what
> GPL is used to prevent) any time soon, so I don't really see a
> particular reason for such a developer-oriented tool to be released
> under GPL.

 Viral licenses only serve that purpose ("protecting from evil
corporations"). If he licensed Vellum with GPL in the first place,
he's worried about that.

>
> Basically, avoiding GPL maximizes the brainshare that a small-ish tool

 True, but you may never ever see the brilliant result of that
brainshare work. Thus, for the author, your sentence is false.

> is going to attract, and many (including myself, FWIW) view GPL as a

 How many ?

> big turn-off when I consider spending some time to familiarize myself
> with a tool, or recommending it to someone else.


From usenet at solar-empire.de  Sun May 18 15:17:43 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Sun, 18 May 2008 21:17:43 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <nvb6g5-7qn.ln1@pluto.solar-empire.de>

Matt Porter <mabbikeel at gmail.com> wrote:
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"

You mean like this?

 >>> ''.join(c for c, _ in itertools.groupby("AAAABBBCAADCASS"))
 'ABCADCAS'

HTH
  Marc


From castironpi at gmail.com  Mon May  5 19:40:50 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 16:40:50 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>
Message-ID: <ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>

On May 5, 1:26?pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
> Hi there. ?Maybe a little more context would
> help us figure out what you want here...
>
> On May 5, 1:28 pm, castiro... at gmail.com wrote:
>
> > Is multimap just a syntax-checked dictionary of mutable sequences?
>
> I think the equivalent of a multimap can be
> implemented several different ways, depending on
> what you need:
>
> ? for
> ? ? ? ?1 maps to 2,3
> ? ? ? ?5 maps to 7
> ? - dictionary mapping to lists
> ? ? ? ?{ 1:[2,3], 5:[7] } # supports unhashable values
> ? - dictionary mapping to dictionary
> ? ? ? ?{ 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
> and dense data
> ? - dictionary with tuple/pairs as keys
> ? ? ? ?{ (1,2):None, (1,3):None, (4,7):None } # streamlined for
> existence testing

It's possible there are four different kinds of multimaps.

objects map to set
objects map to frozenset
objects map to sequence
frozenset maps to object

What does the STL use?  I am interested in a serialization that
changes certain bits and appends more.  Prior discussion brought me to
multimap, but that quotient stifled it.

> If you search usenet (google groups) for multimap
> you will find some nice discussions by Alex Martelli and others.
>
> > Is def( a ): a[:]= [x] a trick or part of the language? ?It looks
> > pretty sharp in variable-width.
>
> You lost me here.

I was referring to a couple of threads from the Winter [cit. off'd.]
that never really gelled.

Modifying parameters is crucial to a number of control flow structures
(program divisions).  Examples could come handy.

>>> def a( x ): x[:]= [x[0]+ 1]
...
>>> b= [2]
>>> a(b)
>>> b
[3]

I'm not sure if doing so is operating strictly by side-effect, or what
the term is.  I forget from theory class if all the same terminology
holds post hoc* to introduction of Memory structures, either hard or
soft as modeled in formal functional-expressional language systems.  I
noticed the idiom x[:]= [y].  Does it mean the right thing?  At higher
levels of complexity, it scans as an unnamed struct.  (Warning,
interacts with logical development.)  What is the meaning of slice
assigment, if not?

*post/poster [...after]. This use originates in the Latin phrase,
'post hoc ergo propter hoc'.

> python 2.6:>>> def (a): a[:]=[x]
>
> ? File "<stdin>", line 1
> ? ? def (a): a[:]=[x]
> ? ? ? ? ^
> SyntaxError: invalid syntax
>
> All the best. ?-- Aaron Watters
>
> ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=gaping+securit...




From alex.gaynor at gmail.com  Tue May 13 20:41:24 2008
From: alex.gaynor at gmail.com (alex.gaynor at gmail.com)
Date: Tue, 13 May 2008 17:41:24 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
Message-ID: <b136c669-8326-4900-87c4-6f86f7ea189c@e39g2000hsf.googlegroups.com>

On May 13, 7:29?pm, Con <conra... at gmail.com> wrote:
> Hi, how does properly install the Python MySQL db module for Mac OS
> X? ?I was only able to locate the Win32 modules.
>
> Thanks in advance,
>
> -Conrad

I think the easiest way to would be to use macports.


From barry at python.org  Thu May  8 19:50:06 2008
From: barry at python.org (Barry Warsaw)
Date: Thu, 8 May 2008 19:50:06 -0400
Subject: RELEASED Python 2.6a3 and 3.0a5
Message-ID: <88DFD025-8670-42FA-9B73-AFF5193FB0AE@python.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On behalf of the Python development team and the Python community, I  
am happy to announce the third alpha release of Python 2.6, and the  
fifth alpha release of Python 3.0.

Please note that these are alpha releases, and as such are not  
suitable for production environments.  We continue to strive for a  
high degree of quality, but there are still some known problems and  
the feature sets have not been finalized.  These alphas are being  
released to solicit feedback and hopefully discover bugs, as well as  
allowing you to determine how changes in 2.6 and 3.0 might impact
you.  If you find things broken or incorrect, please submit a bug  
report at

    http://bugs.python.org

For more information and downloadable distributions, see the Python
2.6 website:

    http://www.python.org/download/releases/2.6/

and the Python 3.0 web site:

    http://www.python.org/download/releases/3.0/

These are the last planned alphas for both versions.  If all goes  
well, next month will see the first beta releases of both, which will  
also signal feature freeze.  Two beta releases are planned, with the  
final releases scheduled for September 3, 2008.

See PEP 361 for release details:

     http://www.python.org/dev/peps/pep-0361/

Enjoy,
- -Barry

Barry Warsaw
barry at python.org
Python 2.6/3.0 Release Manager
(on behalf of the entire python-dev team)

-----BEGIN PGP SIGNATURE-----
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From stef.mientki at gmail.com  Thu May  1 06:10:45 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Thu, 01 May 2008 12:10:45 +0200
Subject: __getattr__ and recursion ?
In-Reply-To: <fv9gpf$e4a$02$1@news.t-online.com>
References: <mailman.343.1209498035.12834.python-list@python.org>
	<fv9gpf$e4a$02$1@news.t-online.com>
Message-ID: <48199725.8020209@gmail.com>

thanks Peter,

for your perfect explanation, and
> By the way, looping over a dictionary destroys its key advantage, O(1)
> lookup. Use
>
> # untested
> if attr in self.extra_setters:
>     self.extra_setters[attr](value)
> else:
>     self.__dict__[attr] = value
>
> and something similar in __getattr__().
>
>   
yes, that's probably much better, have to get used to this Python behavior,
thanks,

cheers,
Stef



From upton at virginia.edu  Mon May  5 10:16:48 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 5 May 2008 10:16:48 -0400
Subject: pygame music, cant read mp3?
In-Reply-To: <0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805050716r670c01f1u92c7dfeae39abedf@mail.gmail.com>

On Mon, May 5, 2008 at 10:09 AM, globalrev <skanemupp at yahoo.se> wrote:
> On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
>  wrote:
>  > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> >
>  > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>  >
>
> > Are you sure that:
>  >
>  > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>  >
>  > Check it with python.
>  >
>  > --
>  > Regards,
>  > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
>
>
>  >>> import os
>  >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>  False
>
>
>  but...it is there....
>
>  >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>  False

What about:

os.path.exists('C:\\Python25\\myPrograms\\pygameProgs\\dront.mp3') == True

That's what Diez mentioned earlier in the thread about escaping the slashes.
>
>  does it matter if i use / or \? which si recommended?


Which slash to use basically depends on whether you're on Windows
(uses \ as a path separator) or *nix (uses / as a path separator).


From sturlamolden at yahoo.no  Sun May 18 15:50:30 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 12:50:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<i3e034l3n6bvt8g0lbk8bvekatqu49r69c@4ax.com>
Message-ID: <a46eaca4-934d-4294-9fa9-ee9ee108ff4f@m73g2000hsh.googlegroups.com>

On May 18, 4:20 pm, David C. Ullrich <dullr... at sprynet.com> wrote:

> Are you going to be doing research _about_ the
> algorithms in question or is it going to be research
> _using_ these algorithms to draw conclusions
> about other things?
>
> Most of the replies seem to be assuming the latter.
> If it's the former then Python seems like definitely
> an excellent choice - when you have want to try
> something new it will be much faster trying it
> out in Python,

I second this. Hence my previous statement that "In scientific
research, CPU time is cheap and time spent programming is expensive."
If it was not clear what I meant, your post can serve as a
clarification. But whether Giner is 'developing' or 'using'
algorithms, he should value his own labour more than the CPU's. CPU
labour (i.e. computation) is very cheap. Manual labour (i.e.
programming) is very expensive. He may in any case benefit from using
Python. Today, the preferred computer language amount scientists is
not Fortran77, but various high-level languages like Matlab, S, IDL,
Perl and Python.

A related question is: How much 'speed' is really needed? If Giner is
analyzing datasets using conventional statistics (ANOVA, multiple
regression, etc.), when will Python (with NumPy) cease to be
sufficient? In my experience, conventional statistics on a dataset of
100,000 or 1,000,000 samples can be regarded child's play on a modern
desktop computer. One really need HUGE amounts of data before it's
worthwhile to use anything else. If one can save a couple of seconds
CPU time by spending several hours programming, then the effort is not
just futile, it's downright wasteful and silly.


Something else that should be mentioned:

The complexity of the algorithm (the big-O notation) is much more
important for runtime performance than the choice of language. If you
can replace a O(N*N) with O(N log N), O(N) or O(1) it is always
adviceable to do so. An O(N*N) algorithm implemented in C is never
preferred over an O(N) algorithm written in Python. The only time when
C is preferred over Python is when N is large, but this is also when
O(N*N) is most painful. Pay attention to the algorithm is things are
running unbearably slow.

Python has highly tuned datatypes like lists, dicts and sets, which a
C programmer will have a hard time duplicating. This also applies to
built-in algorithms like 'timsort'. qsort in the C standard library or
anything a C programmer can whip up within a reasonable amount of time
simply doesn't compare. C vs. Python benchmarks that doesn't take this
into account will falsely put Python in a bad light.













From martin at v.loewis.de  Sun May 11 02:50:27 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 11 May 2008 08:50:27 +0200
Subject: Compiling Python 2.5.2 on AIX 5.2
In-Reply-To: <9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>
References: <0b73e8e5-c301-4823-ac94-42f757456cf1@x19g2000prg.googlegroups.com>
	<mailman.402.1208181700.17997.python-list@python.org>
	<d72454cc-256d-4e24-ae2b-b87dd77c9e0d@c19g2000prf.googlegroups.com>
	<48059DA9.5080900@v.loewis.de>
	<c55ebac2-093c-4639-8fd4-c54df2ecf480@k1g2000prb.googlegroups.com>
	<480c2364$0$26788$9b622d9e@news.freenet.de>
	<e05d2418-89b5-4864-a46b-e27341ec84d9@26g2000hsk.googlegroups.com>
	<480e2bbc$0$24477$9b622d9e@news.freenet.de>
	<9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>
Message-ID: <48269733.4000305@v.loewis.de>

>   Opening mmap with access=ACCESS_COPY
>   Modifying copy-on-write memory map.
> Traceback (most recent call last):
>   File "Lib/test/test_mmap.py", line 393, in <module>
>     test_both()
>   File "Lib/test/test_mmap.py", line 247, in test_both
>     m.flush()
> EnvironmentError: [Errno 22] Invalid argument

I see. This is

http://bugs.python.org/issue678250

Regards,
Martin


From bborcic at gmail.com  Thu May  8 08:43:47 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 08 May 2008 14:43:47 +0200
Subject: slicing lists
In-Reply-To: <xxuUj.250118$pM4.15725@pd7urf1no>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<fvtf0p$6pj$1@news.mtu.ru>	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <fvusjn$nne$1@ger.gmane.org>

Yves Dorfsman wrote:
> 
> So would it be a worthy addition to python, to add it right in the core 
> of the language, and hopefully in an efficient manner ?
> 

Note that the s[0,2:6] syntax is currently allowed because of the distinct 
semantics that the Numeric module and its successors numarray and numpy had for it.



From marco at sferacarta.com  Mon May 12 03:54:56 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 09:54:56 +0200
Subject: source beautifier
In-Reply-To: <48242959.3030405@behnel.de>
References: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
	<48242959.3030405@behnel.de>
Message-ID: <lJSVj.40228$o06.28055@tornado.fastwebnet.it>

Stefan Behnel wrote:

>> http://www.polystyle.com/features/python-beautifier.jsp
>>
>> I've never used it, but the example is quite clear.
> 
> I tend to believe that running these tools on some average Python code would
> not even change whitespace. ;)

I bet it's idempotent against _your_ code, but not in the context of 
python beginners or people who just made up their mind about what coding 
style to use.


From ptmcg at austin.rr.com  Wed May 21 12:15:04 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 21 May 2008 09:15:04 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
Message-ID: <085a3a40-5e58-4523-8815-092a9a52a258@k30g2000hse.googlegroups.com>

On May 21, 10:59?am, Damon Getsman <dgets... at amirehab.net> wrote:
> I'm having an issue parsing lines of 'last' output that I have stored
> in a /tmp file. ?The first time it does a .readline() I get the full
> line of output, which I'm then able to split() and work with the
> individual fields of without any problem. ?Unfortunately, the second
> time that I do a .readline() on the file, I am only receiving the
> first character of the first field. ?Looking through the /tmp file
> shows that it's not corrupted from the format that it should be in at
> all... ?Here's the relevant script:
>
> ----
> ? ? #parse
> ? ? Lastdump = open('/tmp/esd_tmp', 'r')
>
> ? ? #find out what the last day entry is in the wtmp
> ? ? cur_rec = Lastdump.readline()
> ? ? work = cur_rec.split()
>
> ? ? if debug == 1:
> ? ? ? ? print work
> ? ? ? ? print " is our split record line from /tmp/esd_tmp\n"
>
> ? ? startday = work[3]
>
> ? ? if debug == 1:
> ? ? ? ? print startday + " is the starting day\n"
> ? ? ? ? print days
> ? ? ? ? print " is our dictionary of days\n"
> ? ? ? ? print days[startday] + " is our ending day\n"
>
> ? ? for cur_rec in Lastdump.readline():
> ? ? ? ? work = cur_rec.split()
>
<snip>


    for cur_rec in Lastdump.readline():

is the problem.  readline() returns a string containing the next
line's worth of text, NOT an iterator over all the subsequent lines in
the file.  So your code is really saying:

    next_line_in_file = Lastdump.readline():
    for cur_rec in next_line_in_file:

which of course, is iterating over a string character by character.

Since you are opening Lastdump (not great casing for a variable name,
BTW - looks like a class name with that leading capital letter), it
gives you an iterator already.  Try this instead:

lastdump = open('/tmp/esd_tmp', 'r')

cur_rec = lastdump.next()

...

    for cur_rec in lastdump:

...

This should get you over the hump on reading the file.

Also, may I suggest this method for splitting up each record line, and
assigning individual fields to variables:

    user,s1,s2,day,month,date,time,desc = cur_rec.split(None,7)

-- Paul



From phil at riverbankcomputing.com  Wed May 21 18:50:49 2008
From: phil at riverbankcomputing.com (Phil Thompson)
Date: Wed, 21 May 2008 23:50:49 +0100
Subject: ANN: PyQt v4.4.2 Released
Message-ID: <200805212350.49250.phil@riverbankcomputing.com>

Riverbank Computing is pleased to announce the release of PyQt v4.4.2 
available from http://www.riverbankcomputing.com/software/pyqt/.

This release adds full support for Qt v4.4.0 including the new QtHelp, 
QtWebKit, QtXmlPatterns and phonon modules.

A Windows installer is provided for the GPL version of PyQt which contains 
everything needed for PyQt development (including Qt, Qt Designer and 
QScintilla) except Python itself.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt (Windows, Linux and MacOS/X).  Like Qt, 
PyQt is available under the GPL and a commercial license.

PyQt v4 supports Qt v4 (http://www.trolltech.com/products/qt/index.html).  
PyQt v3 is still available to support earlier versions of Qt.

PyQt v4 is implemented as a set of 17 extension modules containing over 400 
classes and over 6,000 functions and methods.

    QtCore
    The non-GUI infrastructure including event loops, threads, i18n, Unicode,
    signals and slots, user and application settings, mapped files and shared
    memory.

    QtDesigner
    A set of classes that allow the Qt Designer GUI design tool to be extended
    with PyQt.

    QtGui
    A rich collection of GUI widgets.

    QtHelp
    A set of classes for creating and viewing searchable documentation and
    being able to integrate online help with PyQt applications.  It includes
    the C++ port of the Lucene text search engine.

    QtNetwork
    A set of classes to support TCP and UDP socket programming and higher
    level protocols (eg. HTTP, SSL).

    QtOpenGL
    A set of classes that allows PyOpenGL to render onto Qt widgets.

    QtScript
    A set of classes that implements a JavaScript interpreter.  Python objects
    may be exposed in the interpreter as JavaScript objects.

    QtSql
    A set of classes that implement SQL data models and interfaces to industry
    standard databases.  It includes an implementation of SQLite.

    QtSvg
    A set of classes to render SVG files onto Qt widgets.

    QtTest
    A set of classes to automate unit testing of PyQt applications and GUIs.

    QtWebKit
    This implements a web browser engine based on the WebKit engine used by
    Apple's Safari browser.  It allows the methods and properties of Python
    objects to be published and appear as JavaScript objects to scripts
    embedded in HTML pages.

    QtXML
    A set of classes that implement DOM and SAX parsers.

    QtXMLPatterns
    A set of classes that implement XQuery and XPath support for XML and
    custom data models.

    QtAssistant
    A set of classes that enables the Qt Assistant online help browser to be
    integrated with an application.

    QAxContainer
    A set of classes for Windows that allows the integration of ActiveX
    controls and COM objects.

    phonon
    A cross-platform multimedia framework that enables the use of audio and
    video content in PyQt applications.  DirectX is used as the Windows
    backend, QuickTime as the MacOS/X backend, and GStreamer as the Linux
    backend.

    DBus
    PyQt includes dbus.mainloop.qt that allows the Qt event loop to be used
    with the standard DBus Python bindings.

PyQt includes the pyuic4 utility which generates Python code to implement user
interfaces created with Qt Designer in the same way that the uic utility
generates C++ code.  It is also able to load Designer XML files dynamically.

Phil


From pavlovevidence at gmail.com  Wed May 14 17:47:12 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 14 May 2008 14:47:12 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <062fd218-35d5-478e-b2cf-aef2e571a2fa@c65g2000hsa.googlegroups.com>

On May 14, 12:21 pm, vbgunz <vbg... at gmail.com> wrote:
> Other than the 2 reasons above (2 making more sense), what is a really
> good reason to pull out the class method. In other words, when you see
> one, what is the first thing that comes to mind? When you write one,
> what was the first thing on your mind? Other than "similar to static-
> methods", at what point will you be glad you used one? To sum it up,
> what is the best role for a class-method that does not turn your work
> into code-soup?


When classmethods are inherited, they are called with the class it was
invoked with, rather than the class they were defined in.  Try this
example:


class A(object):
    @classmethod
    def classname(cls):
        print cls.__name__

    @staticmethod
    def staticname():
        print "A"

class B(A):
    pass

B.staticname()
B.classname()


Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 04:21:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 10:21:30 +0200
Subject: Compress a string
In-Reply-To: <48307858$0$906$ba4acef3@news.orange.fr>
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<48307858$0$906$ba4acef3@news.orange.fr>
Message-ID: <48328a04$0$19210$426a74cc@news.free.fr>

Salvatore DI DI0 a ?crit :
(top-post corrected - Salvatore, please, don't top-post)
> "Matt Porter" <mabbikeel at gmail.com> a ?crit dans le message de news: 
> mailman.1315.1211133997.12834.python-list at python.org...
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"

 > Try this
 >
 > t = set("aaaaaaaaaaaabbbbbbbbbbccccccccc")
 > list(t)

Won't keep the ordering.




From rhamph at gmail.com  Sat May 10 12:02:11 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sat, 10 May 2008 09:02:11 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
	<48240921$0$7184$426a74cc@news.free.fr> 
	<mailman.883.1210362812.12834.python-list@python.org>
Message-ID: <254b1295-9a91-4bc2-9dba-7ec7af5c19e0@a9g2000prl.googlegroups.com>

On May 9, 1:53 pm, Daniel Marcel Eichler <onsen-n... at gmx.net> wrote:
> Am Freitag 09 Mai 2008 10:19:45 schrieb Bruno Desthuilliers:
>
> > >> very often sees do-nothing catch-all try/catch blocks in Java -
> > >> which is way worse than just letting the exception propagate. I
> > >> find all this totally pointless, because there's just no way for a
> > >> compiler to check if your code is logically correct.
>
> > > But it's enough if the called method exists and returns the correct
> > > type. At least it prevents a crash.

The application has already failed.  You'd prefer it silently do the
wrong thing than get an explicit error message and stop?


> > >>> That's the point. Interfaces garantee that a duck is a duck, an
> > >>> not only a chicken that quack.
>
> > >> Who cares if it's a chicken as long as it quacks when you ask her
> > >> to ? Now *This* is the whole point of chicken^Mduck typing, isn't
> > >> it ?-)
>
> > > Ducks can also swim and fly.  And if you need a really duck,
>
> > If you're code expects something that quacks, swims and flies,
> > anything that quacks, swims and flies is ok. You just don't care if
> > it's a duck or a flying whale with a quacking device tied to it.
>
> Not the point.

It really is.  They're only going to give you something they expect to
work.  They might occasionally make a mistake and give you garbage,
but it's not worth the effort of trying to catch it early.



From aguirre.adolfo at gmail.com  Tue May  6 18:54:08 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Tue, 6 May 2008 15:54:08 -0700 (PDT)
Subject: DISLIN 9.3 starting issues
Message-ID: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>

*** I thought I posted this subject 45 min ago but it does not show so
something went wrong and it does not show up. Excuse me if I repeat
myself  ***

DISLIN 9.3 old manual problems

I just installed DISLIN 9.3 for python (DISPY is installed too)  and I
am up to:

1.4 Quickplots
Some quickplots are added to the DISLIN module which are collections
of DISLIN routines for displaying data with one command. For example,
the function ?plot? displays two-dimensional curves.

Example:
from Numeric import *
from dislin import *
x = arange (100, typecode=Float32)
plot (x, sin (x/5))
disfin ()


I built the following little program:

from numpy import *
from dislin import *

def main():
    x = arange (100, typecode=Float32)
    plot (x, sin (x/5))
    disfin ()

main()

*** Here are the problems:

1. The "from Numeric import" statement did not work, I replaced with
"from numpy import*" and no complains form the interpreter.

2. If I enyter "from dislin import *" I get:
 Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    from dislin import *
ImportError: No module named dislin
>>>

I checked the environmental variables paths and it all seems Ok:
c:\dislin
SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
\Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python

WHAT ELSE TO DO?

any help will be much apreciated


From kw at codebykevin.com  Sat May 10 12:02:11 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 12:02:11 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.905.1210434531.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>	<mailman.902.1210433160.12834.python-list@python.org>	<4825C265.90106@codebykevin.com>
	<mailman.905.1210434531.12834.python-list@python.org>
Message-ID: <4825C703.8070206@codebykevin.com>

Guilherme Polo wrote:

> Thanks ;)
> And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

Excellent. I hope your effort is successful.
>
> Thanks for support it, and sorry for saying yours was incomplete.
> I wasn't trying to sell my version by doing that, was just trying to
> say there were some point on doing another wrapper. I also noticed
> that there is some problem in getting Martin Franklin to fill the
> contributors agreement, that was the second point on doing this
> wrapper.

No offense taken. Martin is pretty busy these days and doesn't have time 
to work on it further; frankly, I'm not sure I'd have time if a lot of 
changes were requested. So if your package proves to be the best, great! 
I'll switch over my own apps to it.

Good luck!

Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From deets at nospam.web.de  Wed May 28 17:52:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:52:08 +0200
Subject: Threads and import
In-Reply-To: <44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
	<6a60t2F35v9uuU1@mid.uni-berlin.de>
	<44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>
Message-ID: <6a62gcF364hvfU1@mid.uni-berlin.de>

> Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> import TestThread # from TestThread.py

If I use python 2.5, this doesn't happen - instead, the module ist just run.

If I use python 2.4, it doesn't work unless I do

export PYTHONPATH=.

before I use the -m-option.

But then it works as advertised...

Diez


From alex.m.gusarov at gmail.com  Tue May 27 07:48:38 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:48:38 +0700
Subject: graphical ide??
In-Reply-To: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
Message-ID: <ac6dcb3d0805270448m643b13ardc15027fec979722@mail.gmail.com>

I tried Eric (on windows), but then decided in favour of Eclipse +
PyDev. It's really good combination and if you want to develop PyQt
apps, you can also install Qt Integration plugin to Eclipse, so you
will have all what you need for PyQt development, include form
designer and resource editor. PyQt + Eclipse Qt plugin distributed
under GPL.

--
Best regards, Alex Gusarov


From kyosohma at gmail.com  Fri May  9 10:06:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:06:32 -0700 (PDT)
Subject: help needed!
References: <mailman.866.1210341290.12834.python-list@python.org>
Message-ID: <aa067ba4-4349-4157-b4d4-4139ecb26874@m3g2000hsc.googlegroups.com>

On May 9, 8:54?am, drjekil <drjeki... at gmail.com> wrote:
> i have a script which will do a specific task for a file in a folder,now i
> would like to do the same task ?for the all files in that folder(25
> files).how can i do that?
>
> Thanks in advance.
>
> --
> View this message in context:http://www.nabble.com/help-needed%21-tp17148388p17148388.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

Use a loop, probably in combination with os.walk.

Mike


From arnodel at googlemail.com  Thu May  8 02:58:57 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 7 May 2008 23:58:57 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
Message-ID: <fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>



George Sakkis wrote:
> One of the few Python constructs that feels less elegant than
> necessary to me is the del statement. For one thing, it is overloaded
> to mean three different things:
> (1) del x: Remove x from the current namespace
> (2) del x[i]: Equivalent to x.__delitem__(i)
> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

Note that the 'X = Y' construct has the corresponding three meanings:

(1) x = 4 # Bind x to 4 in the 'current namespace'
(2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
(3) x.a = 4 # Equivalent to x.__setattr__('a', 4)

What conclusion should we draw from that?

--
Arnaud


From marlin_rowley at hotmail.com  Fri May 23 00:31:35 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 22 May 2008 23:31:35 -0500
Subject: How do I make a copy of my class object?
In-Reply-To: <g14pu5$phf$1@ger.gmane.org>
References: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>
	<g14pu5$phf$1@ger.gmane.org>
Message-ID: <BAY135-W185DB3142C0A6158064EE99FC10@phx.gbl>

Nevermind.
 
I ended up making a copy of everything within the class since I'm storing bitmaps anyway.  It works.
 
I'll read up more on the deepcopy() function.



> To: python-list at python.org> From: russblau at hotmail.com> Subject: Re: How do I make a copy of my class object?> Date: Thu, 22 May 2008 17:52:02 -0400> > "Marlin Rowley" <marlin_rowley at hotmail.com> wrote in message > news:BAY135-W134E8CAB38A2ACB2F5933F9FC60 at phx.gbl...> > I have a class object which has the usual data members and functions.> > I'm trying to make a copy of this class (which includes wx.Bitmap objects)> > but deepcopy() doesn't seem to work. How would I do this?> > Are you trying to make a copy of the "class object" or of a class instance?> > What error message are you getting when you call deepcopy() on this object?> > > > > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From bbxx789_05ss at yahoo.com  Sun May 11 15:19:01 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:19:01 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
Message-ID: <da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>

On May 11, 12:42?pm, bc90021 <pyt... at bc90021.net> wrote:
> > It's difficult to know what's wrong with the code you posted because:
>
> > * it is not self-contained: otherFile, fileName, pattern are names
> > ? which you do not define;
>
> > * the IOError you reported earlier can't arise as a result of running
> > ? this code.
>
> > * you claim it works unless you put it in a subclass of
> > ? threading.Thread. ?Why don't you post this instead, and show us the
> > ? traceback?
>
> > HTH
>
> > FWIW, my crystal ball (whose predictions I don't usually report!) tells
> > me the same as Garry Herron's.
>
> Here's the thread class:
>
> #single file is the file we're working on, whose name is passed into the class and which does exist
> #matrix is a list of lists that contains info about the files - for this example, [c][0] contains a string, [c][2] contains true or false, and [c][3] contains a pattern to match
> #tfValue is another true or false value
>
> class FileProcThread(threading.Thread):
> ? ? ? ? def __init__(self, singleFile, matrix, tfValue):
> ? ? ? ? ? ? ? ? self.singleFile = singleFile
> ? ? ? ? ? ? ? ? self.matrix = matrix
> ? ? ? ? ? ? ? ? self.tfValue = tfValue
> ? ? ? ? ? ? ? ? threading.Thread.__init__(self)
> ? ? ? ? def run(self):
> ? ? ? ? ? ? ? ? (dirName, fileName) = os.path.split(self.singleFile)
> ? ? ? ? ? ? ? ? f = open(self.singleFile).readlines()
> ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? for i in range(len(f)):
> ? ? ? ? ? ? ? ? ? ? ? ? for c in range (len(self.matrix)):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (re.search(self.matrix[c][3], f[i])):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.matrix[c][2] == True):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = True
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if os.name == "posix":
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.tfValue == False):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp/" + self.matrix[c][0] + "_tmp_" + fileName +
> ".txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp/" + self.matrix[c][0] + "_other.txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.tfValue == False):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_tmp_" + fileName + ".txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_other.txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (re.search(self.matrix[c][4], f[i])):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? ? ? ? ? if (copying):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? print "We're in copying, and tempfileName is: %s...\n" % tempfileName
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #The above line correctly prints the temporary file name every time! ?The directory exists, too!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g = open(tempfileName, 'a') ?#This does not work. ?Notice I do NOT have quotes around tempfileName, as I said.
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g.write(f[i])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g.close()
>
> Like I said, this works FINE outside the thread class. ?I hope that the formatting comes through...

...and the exact error message was?

Here is a tip: if you want people to help you, then you have to help
them to help you.  Personally, I wouldn't respond to anymore of your
questions because you seem incapable of posting the information that
was requested.


From ludvig.ericson at gmail.com  Tue May 13 07:43:02 2008
From: ludvig.ericson at gmail.com (ludvig.ericson at gmail.com)
Date: Tue, 13 May 2008 04:43:02 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
Message-ID: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>

Hello,

My question concerns asynchat in particular. With the following half-
pseudo code in mind:

    class Example(asynchat.async_chat):
        def readable(self):
            if foo:
                self.push_with_producer(ProducerA())
            return asynchat.async_chat.readable(self)

Now, asyncore will call the readable function just before a select(),
and it is meant to determine whether or not to include that asyncore
dispatcher in the select map for reading.

The problem with this code is that it has the unexpected side-effect
of _immediately_ trying to send, disregarding if the async_chat object
is indeed writable or not.

The asynchat.push_with_producer (and .push as well)
call .initiate_send(), which in turn calls .send if there's data
buffered. While this might seem logical, it isn't at all.

Insinuate that when Example.readable is called, the socket has already
been closed. There are two possible scenarios where it could be
closed. a) The remote endpoint closed the connection, and b) the
producer ProducerA somehow closed the connection (my case).

Obviously, calling send on a socket that has been closed will result
in an error - EBADF, "Bad file descriptor".

So, my question is: Why does asynchat.push* call self.initiate_send?
Nothing in the name "push" suggests that it'll transmit immediately,
disregarding potential "closedness". Removing the two calls
to .initiate_send() in the two push functions would still mean data is
sent, but only when data can be sent - which is, IMO, what should be
done.

Thankful for insights,
Ludvig.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 03:44:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 09:44:16 +0200
Subject: Bit of List replacing trouble (newbie)
In-Reply-To: <mailman.1463.1211432419.12834.python-list@python.org>
References: <mailman.1463.1211432419.12834.python-list@python.org>
Message-ID: <4835243e$0$19743$426a74cc@news.free.fr>

Zethex a ?crit :
> At the moment i'm doing a piece of work for school and I'm stuck at the
> moment.
> 
> I have a list of words, for example:
> 
> Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']

<ot>
Naming convention : variable names are all_lower, so s/Sentence/sentence/
</ot>

> 
> I have another list which I need to use to replace certain words, and its in
> the form of:
> 
> synonyms = [
>                   [canine, [dog, puppy, bulldog]],
>                   [ road, [street, avenue, court]]
>                                                              ]

NB : I assume this is :

synonyms = [
                   ['canine', ['dog', 'puppy', 'bulldog']],
                   [ 'road', ['street', 'avenue', 'court']],
]

and FWIW, I'd use a list of tuples, not a list of lists:

synonyms = [
  ('canine', ['dog', 'puppy', 'bulldog']),
  ('road', ['street', 'avenue', 'court']),
]

or even better a dict:

synonyms = {
  'canine' : ['dog', 'puppy', 'bulldog'],
  'road' :  ['street', 'avenue', 'court'],
}


> What the procedure must do is replace dog with canine, and street with road. 
> Therefore if a word is in the sentence and appears on the right side of the
> list entry, replace it with the left entry.
> 
> I can't seem to find a help file with what I'm after.

This is probably not something that you'll find in any 'help file'. As 
for almost everything algorithmic, the key is to have the appropriate 
data structure. In this case, the appropriate data structure is 
obviously a reversed index of the synonyms dict (assuming there is no 
duplicate word in the synonyms lists):

reversed_synomyms = dict()
for key, values in synonyms.items():
     for word in values:
         reversed_synonyms[word] = key

print reversed_synonyms

=> {'court': 'road', 'bulldog': 'canine', 'dog': 'canine', 'street': 
'road', 'puppy': 'canine', 'avenue': 'road'}


 From then, the replacement procedure is quite obvious:

solution = [reversed_synonyms.get(word, word) for word in sentence]


print solution
=> ['A', 'canine', 'walked', 'across', 'the', 'road']

HTH


From wizzardx at gmail.com  Thu May  8 08:37:51 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 14:37:51 +0200
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <18c1e6480805080537k76bef462u210c4d0d51566885@mail.gmail.com>

> #!/usr/bin/env perl
> #chgit script
> $^I = '';
> while(<>) {
>   s/mike/dave/g;
>   print;
> }
>

#!/usr/bin/python
import sys
lines = open(sys.argv[1]).readlines()
open(sys.argv[1], 'w').writelines([line.replace('mike', 'dave') for
line in lines])


From banibrata.dutta at gmail.com  Wed May 14 01:30:02 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Wed, 14 May 2008 11:00:02 +0530
Subject: What is self.file = file for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805132230g65b4a0a5mfb86382afea10998@mail.gmail.com>

__init__() is the object-constructor for TextReader class, accepting an
argument 'file' (reference to an Object). TextReader has a member variable /
attribute, called 'file' too (same name as the argument to __init__()). The
constructor is invoked when an object of TextReader class is being create.
At that point, the construct binds the reference of the passed file object,
to it's own instance-variable.

'self' is the equivalent of 'this' pointer in C++ as others have mentioned.
So 'self.file' is referring to the instance variable, on the left-hand-side
of the assignment operation, and the 'file' on the right-hand-side is the
method argument.

On 5/14/08, wxPythoner at gmail.com <wxPythoner at gmail.com> wrote:
>
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
>    """Print and number lines in a text file."""
>    def __init__(self, file):
>        self.file = file
>        .
>        .
>        .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From paul.hankin at gmail.com  Tue May  6 16:19:31 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 6 May 2008 13:19:31 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<8f5d04d8-2ece-4e8b-9af9-eefec153d7bd@34g2000hsh.googlegroups.com>
Message-ID: <eae0e4f9-eff9-4e17-95ed-3f0ecb8047ec@34g2000hsf.googlegroups.com>

On May 6, 4:24?pm, cokofree... at gmail.com wrote:
> On May 6, 5:20 pm, krumbleb... at gmail.com wrote:
>
>
>
> > Hi - further to my earlier query regarding partial matches (which with
> > all your replies enabled me to advance my understanding, thanks), I
> > now need to reverse a dict.
>
> > I know how to reverse a list (with the reverse method - very handy),
> > but it doesn't seem possible to reverse a dict.
>
> > I suspect what I need to do is somehow go from:
>
> > thelist=list(thedict)
> > thelist.reverse()
> > thedict=dict(thelist)
>
> > Does anyone know how to convert / or reverse a dict?
>
> > thanks
>
> > kb.
>
> Issue 1: A dictionary is not ordered so cannot be reversed, as is.
>
> Saw something like this though:
>
> info = {"PHP":"17th May",
> ? ? ? ?"Perl":"15th June",
> ? ? ? ?"Java":"7th June",
> ? ? ? ?"Python":"26th May",
> ? ? ? ?"Tcl":"12th July",
> ? ? ? ?"MySQL":"24th May"}
>
> topics = info.keys()
> topics.sort()
> topics.reverse()
>
> for topic in topics:
> ? ?print "Next",topic,"course starts",info[topic]

Better:

for topic, when in sorted(topics.iteritems(), reverse=True):
    print 'Next %s course starts %s' % (topic, when)

--
Paul Hankin


From dullrich at sprynet.com  Tue May 27 10:52:25 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 09:52:25 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
Message-ID: <as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>

On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
<deets at nospam.web.de> wrote:

>David C. Ullrich wrote:
>
>> What version added decorators (using the
>> @decorator syntax)?
>> 
>> (Is there a general way I could have found out the answer myself?)
>> 
>> Is there a somthing such that "from __future__ import something"
>> will make decorators work in 2.5.2?
>
>They do work. They were introduced in python2.4

That's more or less what I thought, but...

Oh. Never mind the details, let's just say that having 2.3 and
2.5 installed on the same machine can lead to confusion 
about exactly which one you're running a script under.
Duh.

Sorry. Thanks. I don't suppose that decorators are available
from __future__ somehow in 2.3?


>Diez

David C. Ullrich


From victorsubervi at gmail.com  Thu May 15 10:48:45 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 15 May 2008 16:48:45 +0200
Subject: Custom Classes?
In-Reply-To: <op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
	<4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>
	<op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805150748o2000689en4582f79fb0103014@mail.gmail.com>

Well, you are right. It looks like one of those instances where I fixed
something and did not check to see if it influenced the problem now at hand.
Thanks again.
Victor


On 5/15/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Tue, 13 May 2008 15:10:21 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> I remember why I had the number with the getpic. It is because I display
>> several of these images on a single page, and apparently I cannot call the
>> same script and get more than one image from an HTML page.
>>
>
> That's not true. If you still have the example I posted a few weeks ago,
> you can use this script to show a full listing of all uploaded pictures.
> It's a small variation of album.py.
> I think you were saving the pictures on disk - DON'T do that. It's
> unnecesary, wastes time and disk space, and if not done properly one request
> interferes with the other.
>
> --
> Gabriel Genellina
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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From workitharder at gmail.com  Thu May 22 19:27:15 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 16:27:15 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
Message-ID: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>

This question seems easy but I can't figure it out.
Lets say there's a function:

def f(a, *args):
    print a
    for b in args: print b

and elsewhere in your program you have a list and a dict like this:
args = [2, 3]
kwargs = {'a':1}

I'd like to get f() to print something like the following, but I can't
figure out how.
1
2


From sjmachin at lexicon.net  Sat May 10 19:42:06 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 23:42:06 GMT
Subject: Find more than one error at once
In-Reply-To: <68lhqrF2tlavsU1@mid.uni-berlin.de>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
	<68lhqrF2tlavsU1@mid.uni-berlin.de>
Message-ID: <482632cc$1@news.mel.dft.com.au>

Diez B. Roggisch wrote:
> Joseph Turian schrieb:
>> Is it possible to coax python to find more than one error at once?
> 
> What kind of errors? Syntax-errors? Then use one of the python source 
> code analyzers, such as pylint or pychecker.

I don't know about pylint, but "PyChecker works in a combination of 
ways. First, it imports each module. If there is an import error, the 
module cannot be processed." -- so it fails on the first syntax error. 
For example:

C:\junk>type syntaxerrors.py
if foo = bar:
     pass
foo = "unterminated
123 = foo

C:\junk>python -m pychecker.checker syntaxerrors.py
Processing syntaxerrors...
   SyntaxError: invalid syntax (syntaxerrors.py, line 1)
     if foo = bar:
            ^

Warnings...

syntaxerrors:1: NOT PROCESSED UNABLE TO IMPORT

C:\junk>




From phd at phd.pp.ru  Sun May  4 10:14:34 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sun, 4 May 2008 18:14:34 +0400
Subject: SQLObject 0.9.6
Message-ID: <20080504141434.GB1321@phd.pp.ru>

Hello!

I'm pleased to announce version 0.9.6, a minor bug fix release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.9.6

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.9.5
----------------

Bug Fixes
~~~~~~~~~

* A bug in inheritable delColumn() that doesn't remove properties was fixed.

* A minor bug was fixed in col.py - the registry must be passed to findClass().

* Reverted the patch declarative.threadSafeMethod() - it causes more harm
  then good.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From gherron at islandtraining.com  Mon May 12 15:40:58 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 12 May 2008 12:40:58 -0700
Subject: question about python statements
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
Message-ID: <48289D4A.3020007@islandtraining.com>

Ohad Frand wrote:
>
> Hi
>
> I am looking for a way to programmically get a list of all python 
> existing statements that I cannot access by __builtins__ or locals()
>
> (like ["assert","break","class",?])
>
> Thanks,
>
> Ohad
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
Sorry, I've no idea what you mean here. Perhaps you could help us by 
defining what you mean by
"statements that I cannot access by __builtins__ or locals()"

Is there any statement that you *can* access in such a way?

What does it even mean to "access a statement"?

Do you even have a list of "statements" from which we are to work? 
Python is a little unusual in what it considers statements.

Gary Herron






From skanemupp at yahoo.se  Mon May  5 15:29:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 12:29:58 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com> 
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com> 
	<mailman.593.1210000345.12834.python-list@python.org>
	<688n7kF2onffkU1@mid.uni-berlin.de>
Message-ID: <1e638f56-8a62-4748-88b2-f7781aeffb05@d1g2000hsg.googlegroups.com>

On 5 Maj, 17:25, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
> > os.path.join(directory)
>
> > Then python can worry about the gritty details, and you don't have to.
>
> Or somewhat neater IMHO:
>
> os.path.join('C:','Python25','myPrograms','pygameProgs','dront.mp3')
>
> Diez

ty i solved it now, apparenly renaming a file it still has its native
filename...

it plays now when i run it from the shell but from the command line it
just blips and finishes right away.

also the sound is not very good, it is disturbed at some parts, why is
this?


From martin at v.loewis.de  Mon May 12 15:21:02 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 21:21:02 +0200
Subject: py3k concerns. An example
In-Reply-To: <201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com>
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com>
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org>
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com>
	<4810977E.3060509@v.loewis.de>
	<201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
Message-ID: <4828989e$0$842$9b622d9e@news.freenet.de>

> Well, my concerns about 3.0 continue to be founded.  Up until now I
> have been just reading "What's New" docs, and relying on input from
> others as to what changes I will have to make.  Yesterday I downloaded
> and installed 3.0a5, and it is clear that there is *no* way to have a
> single code base for any but the most trivial module.

I think there is a way, if you can use 2to3.

> The biggest sticking point is the incompatibility of "except" syntax.
> Apparently the promise of syntax compatibility in the 3.0a4 docs was
> an overstatement.  Syntax can't be conditionalized out with "if
> version >= 3:" type code, so I must have separate Python 2.x and
> Python 3.x codebases, as will anyone whose modules include exception
> handlers.

No, you don't need to maintain two code bases. Just maintain the 2.x
one, and generate the 3.x code every time you need it updated.

2to3 deals with the change to the except clauses just fine.

> I also tripped over the conversion from "<iterator>.next()" to
> "next(<iterator>)". 

2to3 should also fix that one. Alternatively, you can add your own
next implementation to 2.x.

> Conversion of print from statement to function is definitely more
> painful than I thought it would be.  Again, I am fortunate that this
> largely affects only my test code, with only minimal impact on my
> runtime module.

Again, 2to3 fixes these just fine.

> I continue to struggle with some of the refactoring done in references
> to func.func_code, im_self, etc. changing to __code__, __self__, and
> so on.

There are also 2to3 fixers for these, although they might be incomplete.

> By the way Martin, your work on 2to3 was especially helpful in this
> effort - thank you!

Thanks - but this is really Collin Winter's work (with various
contributions of others, of course).

> In summary, I am adjusting my plans for future support of Python
> versions in pyparsing.  As of a pyparsing release some time after
> August, I will only support Python 3.0 versions with any new features
> or bugfixes, and the pyparsing version that is compatible with Python
> 2.x will be frozen.

I don't want to interfere with your project plans, but I don't think
there is a factual need for such a process. Instead, you could continue
to write 2.x code, and produce 3.x code either at release or at install
time.

Regards,
Martin


From bronger at physik.rwth-aachen.de  Fri May 30 12:25:31 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 30 May 2008 18:25:31 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
	<87skw0s0jj.fsf@physik.rwth-aachen.de>
	<8LydnV1nb4Rqvt3VnZ2dnUVZ_gCdnZ2d@posted.visi>
Message-ID: <87abi7iwsk.fsf@physik.rwth-aachen.de>

Hall?chen!

Grant Edwards writes:

> On 2008-05-30, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>> Duncan Booth writes:
>>
>>> [...]
>>>
>>> I don't understand your problem: it's just a single thread so
>>> killfile or skip it.
>>
>> Although I agree with you that there is no problem, *this* is not
>> a good justification for this thread.  One should stay on topic
>> in *every* thread.
>
> [...]
>
> I wouldn't even consider the thread all that OT, but maybe that's
> just me.

Me too, and therefore I see no problem.  But one shouldn't break the
rules, relying on all others sticking to them.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From nagle at animats.com  Fri May 23 11:18:50 2008
From: nagle at animats.com (John Nagle)
Date: Fri, 23 May 2008 08:18:50 -0700
Subject: Database Query Contains Old Data
In-Reply-To: <d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
Message-ID: <4836dcfe$0$34544$742ec2ed@news.sonic.net>

Paul Boddie wrote:
> On 21 Mai, 15:22, giraffe... at gmail.com wrote:
>> I did and I confirmed this by modifying the data, selecting it from
>> the mysql command line client to verify the changes, then running the
>> report again. If I exit the application and then start it again,
>> everything works as expected until the second instance of the report
>> is run.
> 
> Note that if you have a connection open in your program, especially if
> that connection has already been used to select data, it may be the
> case that you then have to perform a rollback or commit before
> attempting to access newly added data. 

     Exactly.  Although it seems counterintutive, it's not enough
to do a COMMIT after UPDATE and INSERT operations.  You also have to
do a COMMIT after a SELECT if you're going to reuse the database handle
and do another SELECT.  Otherwise, you reread the same data forever.

     COMMIT, by the way, is per database handle, so if you have
multiple database handles, each needs to handle its own COMMIT needs.

				John Nagle


From catphive at catphive.net  Tue May 13 22:14:56 2008
From: catphive at catphive.net (Brendan Miller)
Date: Tue, 13 May 2008 19:14:56 -0700
Subject: portable way to tell what Popen will call
Message-ID: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>

I need a portable way to tell what subprocess.Popen will call.

For instance on unix systems, Popen will work for files flagged with the
executable bit, whereas on windows Popen will work on files ending the in
.exe extension (and I don't think anything else). Is there a portable way
to check what Popen will work on without actually execute it? Do I have to
write a bunch of platform specific code here?

Thanks,
Brendan


From bruno.desthuilliers at gmail.com  Mon May  5 16:25:45 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 5 May 2008 13:25:45 -0700 (PDT)
Subject: Browser + local Python-based web server vs. wxPython
References: <mailman.588.1209997391.12834.python-list@python.org>
Message-ID: <9be526d8-4076-40bc-ab53-6098d9360c57@x35g2000hsb.googlegroups.com>

On 5 mai, 16:22, pyt... at bdurham.com wrote:
> I'm looking at rewriting some legacy VB applications and am pondering
> which of the following techniques to use:
>
> 1. Browser based GUI with local web server (Browser +
> wsgiref.simple_server) (I'm assuming that simple_server is class I want
> to build from for a local web server)
>
> -OR-
>
> 2. wxPython based GUI
>
> My thought is that a browser/local web server setup may be more portable
> to mobile environments than wxPython and may offer a way to scale a
> single user offline application to a multi-user online application using
> a remote vs. local web server. Some groups of users may feel more
> comfortable with a browser based interface as well.
>
> I'm looking for feedback from anyone that has pondered the same question
> as well as any pros/cons or tips from anyone that has chosen the
> browser/lcoal web server route.

Your question, in short, is web app vs rich GUI client app. Which is
nothing new (and not Python-specific FWIW).  And the answer depends
mostly on what your app do and what your target audience is.



From larry.bates at websafe.com`  Fri May  2 17:39:36 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 16:39:36 -0500
Subject: Need help: Compiling Python-Code &In-Reply-To=
In-Reply-To: <mailman.483.1209761575.12834.python-list@python.org>
References: <mailman.483.1209761575.12834.python-list@python.org>
Message-ID: <XPidnVS98e29F4bVnZ2dnUVZ_ramnZ2d@comcast.com>

CRAIG DALTON wrote:
> Hi, 
> 
> I'm looking to append several text files in one director and out put the combined files into another director. I'm new to Python and just can't get it to work. So far I've been able to create a file in the desired directory but it isn't pulling any of the data in the originating directory. Could please look at my code and tell me what I'm doing wrong.
> 
> import os,shutil
> f=open("c:\\output\\testing1.txt","a+")
> for r,d,fi in os.walk("c:\\test"):
>     for files in fi:
>         if files.endswith(".txt"):                         
>             g=open(os.path.join(r+,files))
>             shutil.copyfileobj(g,f)
>             g.close()
> f.close()
> 
> Any help would be great.
> 
> Thanks, 
> 
> Craig Dalton
> Business Applications Systems Analyst
> Sentara Healthcare Systems
> Information Technology
> cxdalton at sentara.com
> 
> 

I don't think what you pasted will work at all.  The r+ should produce a syntax 
error on the g=open(os.path.join(r+,files) line.

No real reason to get shutil involved in this.

try something like this (not tested):

outfp=open("c:\\output\\testing1.txt", 'w')
for root,dirs,files in os.walk("c:\\test"):
     for fname in files:
         if fname.endswith(".txt"):
             infp=open(os.path.join(root, fname), 'r')
             of.write(infp.read())
             infp.close()

outfp.close()

or if the files are binary:

use 'wb' and 'rb' instead of 'w' and 'r'

BTW - This will concatenate ALL the .TXT files in c:\test as well as any files 
in any subfolders into a single output file.

-Larry


From deets at nospam.web.de  Sat May  3 11:31:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 03 May 2008 17:31:34 +0200
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
Message-ID: <683eqqF2mr6f5U1@mid.uni-berlin.de>

globalrev schrieb:
> On 2 Maj, 18:13, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> globalrev schrieb:
>>
>>> if pygame.key.get_pressed[K_a]:
>>>             print "Muppet"
>>> K_a is not defined.
>>> but yes it is. why do i get this error?
>> No it isn't - otherwise you wouldn't get this error, wouldn't you?
>>
>> What IS defined is
>>
>> pygame.K_a
>>
>> Or if you do
>>
>> from pygame import K_a
>>
>> then K_a is defined as well.
>>
>> Diez
> 
> ok thanks
> if (key.get_pressed[K_t] and key.get_pressed[K_f]):
>      print "Yup!"
> 
> said int he tut it confused me.
> 
> 
> anyway i changed it and the list or dict from keygetpressed is all
> zeros but the K_a always is true whether i push it or not.

most probably because

key.get_pressed[K_t]

is bogus. It's a method you need to call that returns a list of bools 
that are True for a given index if the key is pressed. Which the 97 is - 
an index to that.


Did you actually bother to read the docs?

http://www.pygame.org/docs/ref/key.html#pygame.key.get_pressed

Diez


From dgetsman at amirehab.net  Wed May 21 12:47:57 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 09:47:57 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
	<085a3a40-5e58-4523-8815-092a9a52a258@k30g2000hse.googlegroups.com>
Message-ID: <5a2b72ea-0964-4f0b-b9cf-383bd9aa9830@59g2000hsb.googlegroups.com>

On May 21, 11:15 am, Paul McGuire <pt... at austin.rr.com> wrote:
> <snip>
>
>     for cur_rec in Lastdump.readline():
>
> is the problem.  readline() returns a string containing the next
> line's worth of text, NOT an iterator over all the subsequent lines in
> the file.  So your code is really saying:
>
>     next_line_in_file = Lastdump.readline():
>     for cur_rec in next_line_in_file:
>
> which of course, is iterating over a string character by character.
>
> Since you are opening Lastdump (not great casing for a variable name,
> BTW - looks like a class name with that leading capital letter), it
> gives you an iterator already.  Try this instead:
>
> lastdump = open('/tmp/esd_tmp', 'r')
>
> cur_rec = lastdump.next()
>
> ...
>
>     for cur_rec in lastdump:
>
> ...
>
> This should get you over the hump on reading the file.
>
> Also, may I suggest this method for splitting up each record line, and
> assigning individual fields to variables:
>
>     user,s1,s2,day,month,date,time,desc = cur_rec.split(None,7)
>
> -- Paul

Well the individual variables isn't exactly appropriate as I'm only
going to be using 2 of the fields.  I think I will set those to
individual variables with a slice of what you mentioned, though, for
readability.  Thank you for the tips, they were all much appreciated.

-Damon


From ptmcg at austin.rr.com  Sun May 18 15:07:33 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 18 May 2008 12:07:33 -0700 (PDT)
Subject: Compress a string
References: <op.ubc28kc14fd8pl@mp1206-hp.config>
	<mailman.1319.1211136639.12834.python-list@python.org>
Message-ID: <fa9bc41d-8ba6-4377-b068-eff22b48ea3a@m45g2000hsb.googlegroups.com>

On May 18, 1:45?pm, Gary Herron <gher... at islandtraining.com> wrote:
> Matt Porter wrote:
> > Hi guys,
>
> > I'm trying to compress a string.
> > E.g:
> > ?"AAAABBBC" -> "ABC"
>

I'm partial to using (i)zip when I need to look at two successive
elements of a sequence:

>>> from itertools import izip
>>> instr = "aaaaaaaaaaabbbbbbbbbbdddddaaaaaaaddddddccccccc"
>>> newstr = "".join( b for a,b in izip(" "+instr,instr) if a!=b )
>>> print newstr
abdadc

-- Paul



From andrew at acooke.org  Sat May 31 12:46:45 2008
From: andrew at acooke.org (andrew cooke)
Date: Sat, 31 May 2008 09:46:45 -0700 (PDT)
Subject: method-wrapper?
Message-ID: <597ecdea-bd88-429c-8b64-03efd4fb0d93@z72g2000hsb.googlegroups.com>

Hi,

Within Python (2.5):

 >>> help("__str__")
 Help on method-wrapper object:
 __str__ = class method-wrapper(object)
  |  Methods defined here:
  |
  |  __call__(...)
  |      x.__call__(...) <==> x(...)
  |
  |  __cmp__(...)
  |      x.__cmp__(y) <==> cmp(x,y)
  [...]

What is "method-wrapper"?  Google turns up hardly any hits, same with
searching python.org.

Thanks,
Andrew


From skanemupp at yahoo.se  Mon May  5 10:09:38 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:09:38 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
Message-ID: <0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>

On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
wrote:
> 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> Are you sure that:
>
> os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> Check it with python.
>
> --
> Regards,
> Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/


>>> import os
>>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
False


but...it is there....

>>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
False

does it matter if i use / or \? which si recommended?


From iainking at gmail.com  Thu May 22 06:01:20 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 22 May 2008 03:01:20 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
	<d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>
	<f564d6f5-a6cf-45de-986e-eac1f2aaae04@r66g2000hsg.googlegroups.com>
Message-ID: <f04e9fac-1250-47be-bd15-0efc7758ce97@r66g2000hsg.googlegroups.com>

On May 22, 1:14 am, bukzor <workithar... at gmail.com> wrote:
> On May 21, 3:28 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > On May 21, 4:21 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > Which is exactly what the python decimal module does.
>
> > Thank you (and Jerry Hill) for pointing that out.  If I want to check
> > Flaming Thunder's results against an independent program, I'll know to
> > use Python with the decimal module.
>
> Utterly shameless.

You may find a more appreciative (and less antagonised) audience for
your language in comp.lang.cobol


From ptmcg at austin.rr.com  Tue May 27 20:26:51 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 27 May 2008 17:26:51 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
Message-ID: <35828b4f-996b-486c-84a7-f5a51d13dd22@f36g2000hsa.googlegroups.com>

On May 27, 5:01?am, Magnus.Morab... at gmail.com wrote:
> Hi,
>
> I wish to extract all the words on a set of webpages and store them in
> a large dictionary. I then wish to procuce a list with the most common
> words for the language under consideration. So, my code below reads
> the page -
>
> http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
>
> a welsh language page. I hope to then establish the 1000 most commonly
> used words in Welsh. The problem I'm having is that
> soup.findAll(text=True) is returning the likes of -
>
> u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"'
>
> and -
>
> <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
>
> Any suggestions how I might overcome this problem?
>
> Thanks,
>
> Barry.
>
> Here's my code -
>
> import urllib
> import urllib2
> from BeautifulSoup import BeautifulSoup
>
> # proxy_support = urllib2.ProxyHandler({"http":"http://
> 999.999.999.999:8080"})
> # opener = urllib2.build_opener(proxy_support)
> # urllib2.install_opener(opener)
>
> page = urllib2.urlopen('http://news.bbc.co.uk/welsh/hi/newsid_7420000/
> newsid_7420900/7420967.stm')
> soup = BeautifulSoup(page)
>
> pageText = soup.findAll(text=True)
> print pageText

As an alternative datapoint, you can try out the htmlStripper example
on the pyparsing wiki: http://pyparsing.wikispaces.com/space/showimage/htmlStripper.py

-- Paul


From mnikhil at gmail.com  Tue May 20 14:21:06 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:51:06 +0530
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>	<g0v2vs$38b$01$1@news.t-online.com>
	<483311EB.1040307@gmail.com> <69gilkF30tko7U1@mid.uni-berlin.de>
Message-ID: <g0v4qi$4dk$2@registered.motzarella.org>

Marc 'BlackJack' Rintsch wrote:
> On Tue, 20 May 2008 23:31:15 +0530, Nikhil wrote:
> 
>> Peter Otten wrote:
>>> Nikhil wrote:
>>>
>>>> I have recently written a small module. When I import the module, I
>>>> always get the error
>>>>
>>>>
>>>> only when I do
>>>>
>>>>  >>> from local.my.module import *
>>>>
>>>> --
>>>> Traceback (most recent call last):
>>>>    File "<stdin>", line 1, in <module>
>>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>>> ---
>>>>
>>>>
>>>> but when I do the below, I do not get any error.
>>>>
>>>> --
>>>>  >> import local.my.module
>>>>  >>
>>>> --
>>>>
>>>> Any ideas on what could be wrong?
>>> Are you abusing the __all__ attribute?
>>>
>>> $ cat tmp.py
>>> __all__ = ['/xyz/py/file']
>>>
>>> $ python -c "from tmp import *"
>>> Traceback (most recent call last):
>>>   File "<string>", line 1, in <module>
>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>>
>> Yes, I am. Is there any reason not to?
> 
> That your module raises the `AttributeError` and is broke is not reason
> enough!?  :-)
> 
>> basically, since this is implemented in the module, I have to export it 
>> since the caller to the function in the module is responsible for 
>> ensuring he has enough proper permissions to read the file.
> 
> What do you mean by "implemented in the module"?  `__all__` is for names
> that live in the module's namespace -- '/xyz/py/file' isn't even a legal
> identifier name in Python!
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch.
Okay.. thanks :-)

I removed the entry from __all__, and I earlier assumed the module to 
break, but it did not. Thanks again :-)



From wizzardx at gmail.com  Wed May  7 03:36:50 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:36:50 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
Message-ID: <18c1e6480805070036n4d2112d7je5a1f154a5c3f76c@mail.gmail.com>

>
>  Google for "overlapping markup" and "python overlapping markup" for
>  more information. Here's one interesting page I found:
>

I found an interesting markup called LMNL, which supports overlapping markup:

http://lmnl.net/

Also, a survey which compares various markup languages, including LMNL:

http://www.cl.cam.ac.uk/~sjm217/projects/markup/survey/

I'm mainly mentioning this because of your past mail where you asked
for existing formats that could meet your needs.

For now your current markup should be fine. But you should research
LMNL too. You can information here also:

http://www.lmnl.org/wiki/index.php/Main_Page

Another, related markup is Creole:

http://www.lmnl.org/wiki/index.php/Creole

David.


From fiacre.patrick at gmail.com  Fri May 23 03:21:09 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:21:09 -0400
Subject: [Regexes] Stripping puctuation from a text
In-Reply-To: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>
References: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>
Message-ID: <48367065$0$11627$607ed4bc@cv.net>

shabda raaj wrote:
> I want to strip punctuation from text.
> 
> So I am trying,
> 
>>>> p = re.compile('[a-zA-Z0-9]+')
>>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
> '  !!  ! ... ?'
> 
> Which gave me all the chars which I want to replace.
> 
> So Next I tried by negating the regex,
> 
>>>> p = re.compile('^[a-zA-Z0-9]+')
>>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
> ' love tomatoes!! hell yeah! ... Why?'
> 
> But this removed the first char instead of the puctuation. So I guess
> ^ is matching start of line, instead of negation. How can I take
> negation of the regex here?


p = re.compile('[^a-zA-Z0-9]+')


From castironpi at gmail.com  Fri May  9 10:01:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 07:01:06 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <e1b1663a-1ceb-4851-b061-dfd043f0ed99@k37g2000hsf.googlegroups.com>

On May 9, 8:41?am, grbgooglefan <ganeshbo... at gmail.com> wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
>
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
> ? ? ?return 1
>
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
>
> How can I make "not" as "!"?

I have found that not 8, not not 8, and ~8 are all valid.  Valid8 is
not.

NameError: name 'Valid8' is not defined, where defined is not defined,
and @Valid8 @Valid8 ...

Late-binding logicals are fine.  #Valid8


From skanemupp at yahoo.se  Tue May 13 15:27:24 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 12:27:24 -0700 (PDT)
Subject: python: lexical or dynamic scope?
Message-ID: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>

i cant figure outif python has lexical or general scope.

it seems functions have lexical scope but with some restrictions and
some non-function scopes are dynamic?


From vivainio at gmail.com  Mon May  5 12:38:08 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 16:38:08 GMT
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <481F37EE.4070908@gmail.com>

ron.longo wrote:

> unable to execute.  Why is this?  At this point I'm not really keen on
> handing out the source files to my application, it feels unprofessional.

If you plan to deploy on windows, py2exe could be the more 
"professional" approach you are thinking of.


From krustymonkey at gmail.com  Thu May  8 11:55:35 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Thu, 8 May 2008 08:55:35 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
Message-ID: <97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>

On May 8, 5:48 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> krustymon... at gmail.com wrote:
> > I'm wondering if anyone can help with a workaround for a problem I
> > currently have.  I'm trying to set up a prefork tcp server.
> > Specifically, I'm setting up a server that forks children and has them
> > listen on pipes created with os.pipe().  The parent process for the
> > group starts an inet:tcp server on a given port.  In the parent, after
> > a "socket.accept()", I'm trying to pickle the connection object to
> > send over an IPC pipe (as stated previously), but I get the following
> > error:
>
> > File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> >     raise TypeError("a class that defines __slots__ without "
> > TypeError: a class that defines __slots__ without defining
> > __getstate__ cannot be pickled
>
> > Does anyone know of a workaround for this?  Maybe my approach to this
> > is wrong?  Any help would be appreciated.
>
> The error-message is pretty clear I'd say. You use slots - so you are
> responsible yourself for implementing the pickling-protocol using
> __getstate__ and __setstate__. Looking at the pickle-docs should give you
> an idea.
>
> But the really easy solution is: do not use slots. They are intended as
> memory-consumption optimization technique, *not* as "I want to declare my
> attributes explicitly"-mechanism. So - get rid of them and be a happy
> pickler.
>
> Diez

The thing is, I'm not using slots by choice.  I'm using the standard
lib "socket" class, which apparently uses slots.


From basti.wiesner at gmx.net  Wed May 28 13:54:23 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Wed, 28 May 2008 19:54:23 +0200
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
	<6a4oumF3464loU1@mid.uni-berlin.de>
Message-ID: <g1k69v$vk5$02$1@news.t-online.com>

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[ Marc 'BlackJack' Rintsch <bj_666 at gmx.net> ]

> On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:
> 
>> Dennis Lee Bieber, the ghost:
>>> I'd have to wonder why so many recursive calls?
>> 
>> Why not?
> 
> Because of the recursion limit of course.  And function call overhead in
> Python is quite high compared to an iterative approach.
And limiting the recursion depth is quite reasonable: The python interpreter
doesn't perform tail call optimisation, each level of recursion depth eats
a bit more memory.  Without a recursion limit a python process might hit
the memory restrictions of the OS kernel, which would cause the OS kernel
to just silently kill the interpreter process.  Now image this happening
inside a mission critical server process ;)


- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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From workitharder at gmail.com  Fri May 23 12:12:52 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 09:12:52 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
Message-ID: <69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>

On May 23, 3:29?am, "inhahe" <inh... at gmail.com> wrote:
> "inhahe" <inh... at gmail.com> wrote in message
>
> news:MKwZj.2749$772.668 at bignews2.bellsouth.net...
>
> > if we assume the constraints are that:
> > 1.he has list, l
> > 2.he has a dictionary, d
> > 3.he wants the function to print the values in the dictionary according to
> > a specific order of their keys as defined by the function, followed by the
> > values of the list
>
> It's also possible (even likely) that he knows outside of the function what
> order he wants the values in, and only used an (incidentally) unordered dict
> called kwargs because he thought that's the only way to pass to those
> parameters. ?in which case the function could be left untouched and the he
> would call it like this:
>
> args = [1,2,3]
> f(*args)
> or
> f(*[1,2,3])

The actual application is an option-parser wrapper (it inherits from
optparse.OptionParser). I use the option setting to generate a dict of
the entry-point arguments versus the values specified by the
commandline. This works well. I can then do main(**options).

I was trying to add support for an entrypoint signature like
main(a,b,c,*argv) so that you can have a script with a variable number
of arguments. I can then make a script like: ./script.py a b c ...,
which requires quotes right now. (The actual application is a command
wrapper, where I would like to just add the script to the front of a
command without modification.)

It's easy to get the dictionary I had previously (of arguments versus
values) and a list of extraneous values to be passed to argv, but I
realized that main(*argv, **options) wasn't going to work.

I wish this worked:
>>> def main(a,b,*argv): pass
>>> options['argv'] = argv
>>> main(**options)
TypeError: main() got an unexpected keyword argument 'argv'


Thanks for the help,
--Buck


From jpeyret at gmail.com  Sat May 24 19:57:43 2008
From: jpeyret at gmail.com (J Peyret)
Date: Sat, 24 May 2008 16:57:43 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
Message-ID: <21fce204-a3d5-4252-b1e2-91a3fae13649@w8g2000prd.googlegroups.com>

Hmmm, for lack of a better response, here are some suggestions, based
on what I've seen on Windows+Linux.

#1 put the .pth in the site-packages directory (this is what I do on
Linux).  I think Python considers it special and looks for pth.

you can probably get that directory from doing

import sys
for i in sys.path:
    print i

#2 put the .pth in the directory where the python executable is
located (this is less messy on Windows than on Linux or OS X)

which python (run on the OS X terminal command shell) should give you
an idea of where that is.

#3 Another idea is to use the Finder to find _other_ *.pth files that
may exist and put yours in the same location.

Best of luck.


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:48:54 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:48:54 -0300
Subject: 'property' builtin does not work for me
References: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
Message-ID: <op.uajqvs1vx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 18:29:57 -0300, Alex Fainshtein  
<alex_fainshtein at netzero.net> escribi?:

> Question: what I am doing wrong? Here, I am defining class with property
> member:
>
> class Test:
>
>     def getter(self):
>         print "Getter called."
>         return 'a'
>
>     def setter(self, val):
>         print "Setter called."
>
>     prop = property(getter, setter)

property requires a new-style class; change the first line to class  
Test(object):
http://docs.python.org/lib/built-in-funcs.html#l2h-57

-- 
Gabriel Genellina



From __peter__ at web.de  Fri May 16 09:19:41 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 15:19:41 +0200
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
	<9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
Message-ID: <g0k1la$vgb$02$1@news.t-online.com>

globalrev wrote:

> On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
>> Christian Heimes wrote:
>> > globalrev schrieb:
>> >> cust1 = customer.__init__('12',['1','435','2332'])
>>
>> > cust1 = customer('12',['1','435','2332'])
>>
>> ... and before that
>>
>> from customer import customer
>>
>> Peter
> 
> why do i have to write that?
> 
> if i do import customer im importing everything no?
> 
> but youre right it doesnt work unless i do, i just dont get why.

It becomes clearer if you follow the usual naming conventions and start the
class name with an uppercase letter:


# in file customer.py

class Customer:
   # your code

The import then becomes

from customer import Customer

i. e. the first "customer" denotes the module, the second "Customer" the
class.

Peter



From skanemupp at yahoo.se  Wed May  7 17:38:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:38:15 -0700 (PDT)
Subject: explain this function to me, lambda confusion
Message-ID: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>

i have a rough understanding of lambda but so far only have found use
for it once(in tkinter when passing lambda as an argument i could
circumvent some tricky stuff).
what is the point of the following function?

def addn(n):
		return lambda x,inc=n: x+inc

if i do addn(5) it returns


>>> def addn(n):
		return lambda x,inc=n: x+inc


>>> addn(5)
<function <lambda> at 0x01D81830>


ok? so what do i write to make it actually do something. and is the
inc=n necessary i cant do x+n?


From bj_666 at gmx.net  Sun May 25 03:30:44 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 May 2008 07:30:44 GMT
Subject: recursion with or without return?
References: <5fe0c5e3-8063-4e84-a40a-3d1938671a80@z72g2000hsb.googlegroups.com>
Message-ID: <69sit4F34jb08U2@mid.uni-berlin.de>

On Sun, 25 May 2008 00:00:14 -0700, notnorwegian wrote:

> when using recursion should one use a return statement or not?

This decision has nothing to do with recursion.  It's the same as in
non recursive functions.  If the function calculates something that you
want to return to the caller you have to use ``return``.  If the function
just has side effects, e.g. printing a tree structure recursively, you
don't have to ``return`` something.

> but is there a guideline for this or it just taste or is it
> considering good style or pythonic to always have a returnvalue?

Well, you always have a return value anyway because there's an implicit
``return None`` at the end of every function.

Ciao,
	Marc 'BlackJack' Rintsch


From tobik00000 at vp.pl  Fri May  9 17:48:47 2008
From: tobik00000 at vp.pl (ddda)
Date: Fri, 9 May 2008 14:48:47 -0700 (PDT)
Subject: BEST VIDEO sex!
Message-ID: <085943bf-e3fc-42b4-b603-41814bd9a294@a70g2000hsh.googlegroups.com>

Best Viedo! SEXI *-*!!
http://rozrywka.yeba.pl/show.php?id=2079
http://rozrywka.yeba.pl/show.php?id=2073


From kyosohma at gmail.com  Fri May 30 14:27:39 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 30 May 2008 11:27:39 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
	<6aanqgF36mnldU1@mid.uni-berlin.de>
	<2980f056-a68f-4d8e-9104-642ef5911fcf@k37g2000hsf.googlegroups.com>
Message-ID: <82471cd7-55bb-4376-bcae-3a601ed8f75a@c65g2000hsa.googlegroups.com>

On May 30, 12:11?pm, Gandalf <goldn... at gmail.com> wrote:
> Hi Diez, I can't see how it ?matter which GUI-Toolkit i uses because I
> can combine libraries.
> I think all that matter is that i work with windows XP.
>
> if you ever done something like that or you familiar with article
> which can show me how to implement what I asked it would help me
>
> Thank you very much

It matters because each Python GUI toolkit works differently. Tkinter
does it via Tk/tcl calls, wxPython uses the wx library and pyGTK does
it in yet another way. The basic ideas are the same, but the
implementations are quite different.

In wx, for example, there are mouse events called wx.MouseEvent:

http://www.wxpython.org/docs/api/wx.MouseEvent-class.html

In Tkinter, they do the same thing, but the calls are almost
completely different. See the following for examples:

http://www.pythonware.com/library/tkinter/introduction/events-and-bindings.htm

You probably either want the MouseEvents or to create an
AcceleratorTable.

Mike


From squareswallower at yahoo.com  Sat May  3 17:12:54 2008
From: squareswallower at yahoo.com (dave)
Date: Sat, 3 May 2008 15:12:54 -0600
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com> <m2r6cjksw6.fsf@googlemail.com>
Message-ID: <fvikgm$gig$1@news.xmission.com>

thanks Duncan and Arnaud.

I'm learning Python from the "How to Think Like a Python Programmer" 
book by Allen Downey.  My first try used the "inv[val] = [key]" and 
then the next problem was to incorporate the "D.setdefault(...)" method.

Thank you for your help.  I'm always amazed how kind people are in this group.

On 2008-05-03 14:57:29 -0600, Arnaud Delobelle <arnodel at googlemail.com> said:

> dave <squareswallower at y1a2hoo3.com> writes:
> 
>> Hello,
>> 
>> here is a piece of code I wrote to check the frequency of values and
>> switch them around to keys in a new dictionary.  Just to measure how
>> many times a certain key occurs:
>> 
>> def invert(d):
>> 	inv = {}
>> 	for key in d:
>> 		val = d[key]
>> 		if val not in inv:
>> 			inv.setdefault(val, [key])
> You can simply write:
>                         inv[val] = [key]
>> 		else:
>> 			inv[val].append(key)
>> 	return inv
>> 
>> 
>> Using the methods above (I'm just a beginner) could I have written it
>> more concisely?  Any criticism/critique in the code would be greatly
>> appreciated.
> 
> Apart from the unnecessary use of setdefault, it looks good to me.
> 
> * You could change if 'val not in inv:' to 'if val in inv:' (and swap
>   the if and else clauses of course) in order to have a positive
>   condition rather than a negative one
> 
> * If you want to use setdefault, you can replace the if .. else
>   construct by:
> 
>                inv.setdefault(val, []).append(key)
> 
> * You can also iterate over keys and values using the items() or
>   iteritems() method of dictionaries:
> 
> def invert(d):
>     inv = {}
>     for key, val in d.iteritems():
>         inv.setdefault(val, []).append(key)
>     return inv




From pavlovevidence at gmail.com  Wed May  7 13:57:03 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 10:57:03 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
Message-ID: <6b6e0eec-a570-4a58-8c8b-72e1cf23d9d7@a1g2000hsb.googlegroups.com>

On May 7, 6:56 am, Paul Boddie <p... at boddie.org.uk> wrote:
> On 6 Mai, 19:22, vivai... at gmail.com (Ville M. Vainio) wrote:
> > I don't think BSD/MIT like license really annoys anyone. Think python
> > here ;-)
>
> As some have pointed out, it can discourage people from contributing.
> I've said many times before that some companies might not contribute
> to a permissively licensed project because their competitors could
> leverage the benefit in proprietary software, and I consider Linux and
> the involvement of companies like IBM to be a reasonable example of
> this.

That IBM and other companies are involved with Linux is an example of
companies that are willing to get involved with GPL; it says nothing
about whether those companies would be more, less, or un- willing to
also get involved with more permissive licenses.

IBM is also involved with Apache, which does have a permissive
license.


Carl Banks


From matt.trevor at gmail.com  Thu May 22 20:57:31 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:57:31 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
	<b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>
	<%viZj.78717$%15.59308@bignews7.bellsouth.net>
Message-ID: <fb16e2cd-f52a-4389-9203-aa687298efa6@c19g2000prf.googlegroups.com>

On May 23, 4:01 am, "inhahe" <inh... at gmail.com> wrote:
> Might have a stack overflow issue, if it retries too many times?

In which example? Neither of them is looping...


From paddy3118 at googlemail.com  Tue May 27 14:12:41 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 27 May 2008 11:12:41 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
	<31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com> 
	<0e67df2c-43c1-4b1f-8220-52556a316595@79g2000hsk.googlegroups.com>
Message-ID: <6c0bfd20-6cdd-4e85-bbcc-b44e7cbf361c@56g2000hsm.googlegroups.com>

On May 27, 12:14 pm, Sverker Nilsson <s... at sncs.se> wrote:
> I had bothered. Volunterly that is too. Becausa I care.
>
> Should we piss of about py3k? It's a debate.
>
I suggest you try and drum up some support for your
position. If you don't get much, then maybe you should
reconsider your stance? And if you do, then you as a group
might find a more effective way to persuade others to
change.

- Paddy.




From catphive at catphive.net  Fri May  2 17:45:16 2008
From: catphive at catphive.net (Brendan Miller)
Date: Fri, 2 May 2008 14:45:16 -0700
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
	<mailman.477.1209757322.12834.python-list@python.org>
Message-ID: <11ltwu9nuoptc.78ifrzrehiy9.dlg@40tude.net>

On Fri, 02 May 2008 21:41:36 +0200, Christian Heimes wrote:

> Brendan Miller schrieb:
>> Hi,
>> 
>> I have functions that take a file object and write to it. In some cases I
>> just want to throw out what is written to that file object. I want
>> something like open('/dev/null', 'w'), but portable.
> 
> import os
> null = open(os.devnull, "wb")
> 
> :)
> 
> Christian

Awesome. Thanks.

Brendan


From daveparker at flamingthunder.com  Wed May 21 11:15:30 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 08:15:30 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
Message-ID: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>

> Or just:
>
> If command is "quit" ...

Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
for assigning and checking types.  For example, to read data from a
file and check for errors:

     Read data from "input.txt".
     If data is an error then go to ...

Or when assigning a type to an identifier:

     HarmonicMean is a function(x, y) ...
     LoopCount is a variable ...

By using = only for equality and "is" only for types, the Flaming
Thunder compiler can detect when either is being used incorrectly
because the syntax for the two is incompatible.  That avoids the man-
years of wasted debugging time spent on languages that accept
statements that are easily confused, yet syntactically valid (e.g. the
confusion between = and == in C if-statments, or the confusion between
= (equality) and "is" (identity) in Python).

On May 20, 3:41?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 20, 4:33 am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
>
>
> > On May 14, 7:59 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
> > > Would it be valid to say:
>
> > > x = "concrete"
>
> > > or to say:
>
> > > if command (is) set to "quit"
>
> > > ??????
>
> > I like the idea of:
>
> > If command is set to "quit" ...
>
> Or just:
>
> If command is "quit" ...
>
>
>
> > I've added it to my list of things to think about, and possibly
> > implement.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -



From gagsl-py2 at yahoo.com.ar  Fri May  9 10:02:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:02:20 -0300
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
Message-ID: <op.uav3x6upx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:40:38 -0300, Clive_S <cliveswan at yahoo.co.uk> escribi?:

> I downloaded (from Python) and installed python-2.4.4.msi
>
> I have python and pythonw.exe in the Python 24 folder (but not in my
> start menu).
> When I click on the pythonw.exe it is not launched??

pythonw.exe is NOT PythonWin - it's a consoleless version of the standard Python interpreter.
PythonWin is part of the pywin32 package that you can download from https://sourceforge.net/projects/pywin32/ (make sure you get the right version)

-- 
Gabriel Genellina



From jon.kappes at gmail.com  Thu May 29 14:08:23 2008
From: jon.kappes at gmail.com (schweet1)
Date: Thu, 29 May 2008 11:08:23 -0700 (PDT)
Subject: Saving tif file from tricky webserver
Message-ID: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>

Greetings,

I am attempting to automate accessing and saving a file (a TIF) from
the following URL:

http://patimg1.uspto.gov/.DImg?Docid=US007376435&PageNum=1&IDKey=E21184B8FAD5

I have tried some methods using urllib, httplib, and
web32com.client(InternetExplorer), but haven't been successful.
Currently I am using (in Python 2.5)

import webbrowser

url = [see above]

webbrowser.open(url, new=0, autoraise=0)

When this is run a windows popup dialog opens asking me to Open, Save,
or Cancel.  However, if I query multiple such URLs, I do not want to
have to respond manually.  Is there a way I can use Python to save the
TIF?


From h.goebel at goebel-consult.de  Sat May 17 07:51:59 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Sat, 17 May 2008 13:51:59 +0200
Subject: Install man-pages with distutils/setuptools
Message-ID: <482ec6e0$0$6774$9b4e6d93@newsspool2.arcor-online.net>

Hi,

is there a standard way or a snippet for installing man-pages with

   python set.py install

when using distutils or setuptools? I have not found one when searching 
the web.

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From bj_666 at gmx.net  Fri May 30 02:10:06 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 May 2008 06:10:06 GMT
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <6a9k1uF364dj7U2@mid.uni-berlin.de>

On Thu, 29 May 2008 15:41:29 -0700, Gandalf wrote:

> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
> 
> mmm isn't their any global variable for functions?

There is but you shouldn't use global variables as they make program and
data flow harder to understand, the code more difficult to test, and
usually couples functions more tightly then they should.

Ciao,
	Marc 'BlackJack' Rintsch


From Lie.1296 at gmail.com  Sun May 18 04:57:26 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 01:57:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<5P6dnTMRFrUXL7LVnZ2dnUVZ_uSdnZ2d@earthlink.com>
Message-ID: <092bbffb-3325-45d4-9714-0dd1fba2ea82@k1g2000prb.googlegroups.com>

On May 18, 5:32 am, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

It is slower than a goodly written C code. C codes might be slower
than Python if the writer of C isn't very familiar with C, on the
other hand Python's implementation of things like list, dictionary,
sets, etc are a very optimized piece of code (some says it's the most
fine tuned implementation in the world) and a sloppily written array/
dict/sets implementation in C might be slower than Python.

> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Why not ask your peers? AFAIK (since I'm not a researcher, just a high-
school student with a "too much time" to program, I'm not even
familiar with Operation Research), in a Operation Research context (as
I understand it from wikipedia) the important thing is the algorithm
instead of pure speed, and codes are written just to describe the
algorithm you're devising. So any programming language that isn't an
esoteric language (like Whitespace or Brainfuck) would not be
considered a "just funny".

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.


On May 18, 11:37?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sat, 17 May 2008 20:25:18 -0700 (PDT), Henrique Dante de Almeida
> <hda... at gmail.com> declaimed the following in comp.lang.python:
> > ?My opinion: choose compiled or byte compiled languages. Choose the
> > language paradigm that best suit the algorithms.
>
> ? ? ? ? Python IS byte compiled -- that's what .pyc and .pyo files contain
> (strangely though, one must specify a command line argument to get the
> "optimized" .pyo, rather than the .pyc with debugging data embedded).

Just to note, currently, "optimized" python code (using -O or -OO)
does very little to make your code goes faster as it doesn't (yet) do
anything but removing docstrings. The -O(ptimized) flags is reserved
to make it possible to add optimizations that might make some features
unavailable or behave differently (such as the docstrings removal that
breaks codes that uses __doc__).


From fredbasset1000 at gmail.com  Mon May 19 18:33:15 2008
From: fredbasset1000 at gmail.com (fredbasset1000 at gmail.com)
Date: Mon, 19 May 2008 15:33:15 -0700 (PDT)
Subject: unittest, how to recursively run tests?
Message-ID: <08e8e41a-cb7e-45c4-a250-133826f02144@a9g2000prl.googlegroups.com>

Hi All,

Does anyone know of a good way to execute all unit tests present in a
project from the project root dir?
Ideally I'd like a mechanism that does not require the tests/files to
be manually listed in the source (e.g. via the suite mechanism).

Thanks all,
Fred


From wuwei23 at gmail.com  Wed May 21 22:41:17 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:41:17 -0700 (PDT)
Subject: extracting title and/or summary of a website
References: <538c89e3-606e-46cb-9f14-671b257e037f@z72g2000hsb.googlegroups.com>
Message-ID: <c0d0eb49-3381-4bc9-ba06-ea585d3b07f5@w4g2000prd.googlegroups.com>

On May 22, 3:28 am, ?????? ????? (ravinder thakur)
<ravindertha... at gmail.com> wrote:
> is there any lib in python that provides a mechanism to get the title
> of a web page ? also is there anything available to get a nice summary
> like the way google shows below every link ?

It's not part of the standard lib but I really like using
BeautifulSoup for this kind of thing:

    from urllib import urlopen
    from BeautifulSoup import BeautifulSoup

    html = urlopen("http://www.google.com").read()
    soup = BeautifulSoup(html)

    print soup.title # '<title>Google</title>'
    print soup.title.renderContents() # 'Google'

http://www.crummy.com/software/BeautifulSoup/

- alex23


From martindesalinas at gmail.com  Fri May 16 04:19:50 2008
From: martindesalinas at gmail.com (martindesalinas at gmail.com)
Date: Fri, 16 May 2008 01:19:50 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>
Message-ID: <5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>

look at

http://pypi.python.org/pypi?%3Aaction=search&term=dbf&submit=search

i use dbfpy


From larry.bates at websafe.com`  Fri May  2 15:23:41 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 14:23:41 -0500
Subject: Searching and replacing text ?
In-Reply-To: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
Message-ID: <yKGdnfugFprY94bVnZ2dnUVZ_qelnZ2d@comcast.com>

Oltmans wrote:
> Hi,
> 
> I'm new to Python (and admittedly not a very good programmer) and I've
> come across a scenario where I've to search and replace text in a
> file.
> 
> For the sake of an example, I'm searching for every occurence of the
> text
> [[http://www.hotmail.com -> Hotmail]]
> 
> I've to replace it with
> [http://www.hotmail.com Hotmail]
> 
> I've come up with following scheme
> p=re.compile(r'\[\[')
> q=re.compile(r'->')
> 
> p.sub('[',txt)
> q.sub('\b',txt)
> 
> Give that I don't have very strong RegEX background, this doesn't look
> very elegant. Is there some other way I can accomplish the same thing?
> Moreover, please note that I'm using 'p' and 'q' for two regex and
> then calling 'sub()' on both p and q. Can't I just do that by
> employing one RegEx and then calling sub() only once?
> 
> Please enlighten me. Thanks in advance.
> 

If you really want to replace EVERY occurrence, no regexes are needed.
I'd do something like (not tested):

fp=open(inputfilename, 'r')
contents=fp.read()
fp.close()
parts=contents.split('[[http://www.hotmail.com -> Hotmail]]')
newcontents='[http://www.hotmail.com Hotmail]'.join(parts)
fp=open(outputfilename, 'w')
fp.write(newcontents)
fp.close()

-Larry


From exarkun at divmod.com  Tue May 13 17:25:39 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 17:25:39 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <2567d557-b5cd-4b12-ad09-67f30ce1078d@b1g2000hsg.googlegroups.com>
Message-ID: <20080513212539.6859.543655387.divmod.quotient.63065@ohm>

On Tue, 13 May 2008 14:05:43 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
>> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>>
>> >> We do not live in a pure world, Python isn't pure (practicality beats
>> >> purity), and by attempting to send some data each time a .push*()
>> >> method is called, there are measurable increases in transfer rates.
>>
>> >Good point. I'd like to ask a question: if we'd have a default
>> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
>> >such problem?
>> >I've always found weird that asyncore has such an high default timeout
>> >value.
>> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>>
>> I'm not sure this is right.  What timeout are we talking about?  Twisted
>> only wakes up when necessary.
>>
>> Jean-Paul
>
>I'm talking about the asyncore.loop timeout parameter which defaults
>to 30 (seconds).
>I don't think that Twisted only wakes up when necessary (surely not by
>using the select reactor).
>Think about the schedule calls feature (reactor.callLater).
>To have that work I guess that a continuous loop must always be kept
>alive, regardless of the reactor used.

To support scheduling calls, you just have to know when the next call is
going to happen.  Then, you can wake up at exactly that time.  This is
what Twisted does, even for select reactor. ;)

An exception to this is that on Windows, in order to support ^C, the
reactor will wake up more often, because ^C does not interrupt select()
in Python on Windows (although this could probably be fixed).

Jean-Paul


From gagsl-py2 at yahoo.com.ar  Wed May 14 03:26:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 04:26:30 -0300
Subject: portable way to tell what Popen will call
References: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>
Message-ID: <op.ua4uygcax6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 23:14:56 -0300, Brendan Miller <catphive at catphive.net>  
escribi?:

> I need a portable way to tell what subprocess.Popen will call.
>
> For instance on unix systems, Popen will work for files flagged with the
> executable bit, whereas on windows Popen will work on files ending the in
> .exe extension (and I don't think anything else). Is there a portable way
> to check what Popen will work on without actually execute it? Do I have  
> to
> write a bunch of platform specific code here?

On Windows, for a quick and dirty answer, include: *.exe,*.cmd,*.bat,*.com

 From the documentation of CreateProcess (Windows), used internally by  
subprocess:
<http://msdn.microsoft.com/en-us/library/ms682425(VS.85).aspx>
Apart from .exe files (PE) - DOS programs (.com and .exe) and 16 bits  
Windows executables (NE) are valid if the appropriate subsystem is enabled.
.bat and .cmd scripts are supported too, altough this isn't explicitely  
menctioned in the docs.
The different executable formats are identified by signature, not  
extension. You can rename foo.exe as foo.xxx and it will be valid still.  
Only for .exe, you can leave out the extension (but CreateProcess does  
*not* use the PATHEXT environment variable; you can't leave out the .cmd  
extension by example).

Even if you filter out things, you have to handle exceptions in Popen. A  
jpeg image with the executable bit set won't be accepted on Unix-like  
systems.

-- 
Gabriel Genellina



From martin.nkm at googlemail.com  Fri May 30 11:33:09 2008
From: martin.nkm at googlemail.com (martin.nkm at googlemail.com)
Date: Fri, 30 May 2008 08:33:09 -0700 (PDT)
Subject: running on WinPC + comunication via USB
Message-ID: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>

Hello, I have two questions.
1/ If I want to use Python and let my WinPC communicate via RS-232
with external embedded computer I know there is a pyserial module,
which I can use it. But what will happen if I want to replace RS-232
by USB? I know I can have virtual COM port, but all the configuration
parameters basically refer to RS-232 parameters - baudrate, bits,
stopbits, parity. In case of USB that's a nonsense I think. Does
anybody know?
2/ Second is a basic question. Do I need also cygwin running on my
Windows PC to get running Python scripts? Or is that Python
interpreter (Win executable) self efficient? Thanks.


From exarkun at divmod.com  Fri May  2 10:48:18 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 2 May 2008 10:48:18 -0400
Subject: portable fork+exec/spawn
In-Reply-To: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>
Message-ID: <20080502144818.6859.2051253710.divmod.quotient.58131@ohm>

On Fri, 02 May 2008 06:30:03 -0500, Nick Craig-Wood <nick at craig-wood.com> wrote:
>Brendan Miller <catphive at catphive.net> wrote:
>>  On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:
>>
>> > URL:http://docs.python.org/lib/module-subprocess.html
>>
>>  Awesome. This is exactly what I was hoping existed.
>
>subprocess works well for spawn process, send input, receive output,
>read exit code type jobs.
>
>For jobs which require interactivity ie send input, receive output,
>send input, receive output, ... it doesn't work well.  There isn't a
>good cross platform solution for this yet.  pyexpect works well under
>unix and is hopefully being ported to windows soon.

I haven't read all of this thread, so excuse me if this is out of place.

There is a good cross-platform solution, in fact.  It's Twisted's
spawnProcess API, which works on POSIX and Windows, supports supports
sending and receiving, and doesn't have deadlock issues since it's
event-driven.

Jean-Paul


From hdante at gmail.com  Mon May 19 20:42:26 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 17:42:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <0154f57e-8d35-4656-a3b9-ca506307c1da@i76g2000hsf.googlegroups.com>

On May 19, 3:07?pm, Vicent Giner <vgi... at gmail.com> wrote:
>
> Yes, of course, but that should mean that I have to do it better, in
> the programming step (I would have to re-program or re-implement my
> algorithm). And I think the problem would be the same in any other
> language, wouldn't it?

 The idea is that a C version of the same program could take, eg. 0,4
hours. But I think we have an authoritative answer here, see Robin
Becker's post (even though he programmed the problem, not the
algorithm). :-)

> Are there such toolkits in other languages? I am not sure they exist
> in C, for example.

 I'm sure there are a lot of toolkits for linear programming (can't
tell about other solvers). glpk is the GNU implementation. It even has
its own built-in language (Mathprog). Someone posted an interesting
link of a python wrapper: "OpenOpt"

 http://scipy.org/scipy/scikits/wiki/OpenOpt

 It supports many solvers. It may be interesting for you, since there
are some non-linear and "global" problem solvers:

 http://scipy.org/scipy/scikits/wiki/OOClasses

> By the way, is it possible (and easy) to call a C function from a
> Python program??

 Yes. The easiest way I know of is using SWIG. People will recommend
you Cython too.


From inhahe at gmail.com  Thu May 22 20:39:39 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:39:39 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
Message-ID: <4moZj.13958$hv2.3334@bignews5.bellsouth.net>

>> 1
>> 2

actually, you don't want it to print 3 also?  if not, then you would do 
f(*map(kwargs.get, inspect.getargspec(f)[0])+args[:1])

> import inspect
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>




From s0suk3 at gmail.com  Thu May 15 17:26:22 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 15 May 2008 14:26:22 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
References: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>
Message-ID: <a69110e5-e622-4963-9816-2cc6730090e5@m44g2000hsc.googlegroups.com>

On May 15, 3:12 pm, RossGK <ros... at gmail.com> wrote:
> Just getting used to the PyDev environment in eclipse by playing with
> a few simple programs. I'm also using wxPython GUI stuff.
>
>  I've noticed though that simple print commands in my code cause a
> "wxPython:stdout/stderr" popup window to display any print's I might
> be dumping out, rather than going to the console in Eclipse.
>
> Any suggestions of why this is?   Another code example I was looking
> at (which does not include any wx GUI stuff) has print commands whose
> result ends up in the Eclipse console, just to further confuse me.
>
> Is this something that wxPython is imposing on the environment?

Yes, it's wxPython, it does that by default. Pass the keyword argument
"redirect" set to False to your wx.App object constructor:

app = wx.App(redirect=False)

Or to whatever class you derived from wx.App:

app = ClassDerivingFromWxApp(redirect=False)


From wuwei23 at gmail.com  Thu May 22 23:56:13 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 20:56:13 -0700 (PDT)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <b6d0d781-e370-4db6-9d05-0ec0ae79500d@x19g2000prg.googlegroups.com>

On May 23, 1:37 pm, John Salerno <johnj... at gmailNOSPAM.com> wrote:
> Basically, the question is this: can you write the logic behind a
> program (whether it be a game, an email client, a text editor, etc.)
> without having any idea of how you will implement the GUI?

Hey John,

Are you familiar with the Model-View-Controller pattern? It
specifically addresses this issue, and is very common in game
development.

In your example of a grid-based game like chess, the board & the
pieces would all be defined in the Model. The board may be a 2D array,
so to move a piece, the piece only has to know how to address
locations within the array, or even better, only has to know how to
tell the board where it's moving to, so the pieces don't have to know
how the board is implemented.

The View interprets & displays the Model. You could represent each
square by a bitmap, draw a 3d object, or use ASCII etc etc.

The Controller maps user input to Model behaviour, so pressing 'up'
while a piece is highlighted may call something like
piece.move_north(), which updates the necessary entities in the Model
to reflect the move. It generally also passes information from the
Model to the View, although it's not uncommon for the View to just
refer to the Model separately.

So you can think of the Model as a simulation of the behaviour you
want, while the View is _a_ representation of that simulation. The
simulation doesn't care if you're displaying it in 2D or 3D, it cares
about pieces and board positions. By separating the Model & the View,
you also allow for multiple representations of the same data, such as
having a 2D overhead map and a 3D visualisation of the same
information.

- alex23


From george.sakkis at gmail.com  Mon May 26 18:21:07 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 15:21:07 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <da57f3d3-2245-4dbc-b218-2a52233101b5@z72g2000hsb.googlegroups.com>

On May 26, 4:02?pm, "Russ P." <Russ.Paie... at gmail.com> wrote:

> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.

On a slightly different question: can a data hiding mechanism be
implemented as an add-on by a third party library without a change in
the core language, just like zope.interface does for interfaces ? If
not, why not ?

> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

Note that even in languages that do implement data hiding, people
often use a naming convention to denote hidden members, e.g. an "m_"
prefix (though I find this uglier than plain underscores).

George


From lists at cheimes.de  Mon May 19 17:04:56 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 19 May 2008 23:04:56 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <200805191629.38919.kyrie@uh.cu>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<200805191629.38919.kyrie@uh.cu>
Message-ID: <g0sq1p$9p5$1@ger.gmane.org>

Luis Zarrabeitia schrieb:
> Personally, I like to use "is" with singletons. I find it easier to type and 
> read "if param is None" than "if param == None", but some python developers 
> dislike the first one because of the "dark magic" involved in knowing that 
> None is a singleton.

Testing for None is the only common case where you should *not* use ==
comparison. If you want to check if something is None then do "if
something is None". Easy, isn't it? :]

Look, what Python does for the various way (simplified):

"if a == None:" -> "if a.__cmp__(None)"

"if a is None" -> "if id(a) == id(None)"

"if a:" -> "if a.__nonzero__()" / "if a.__len__()"

Christian



From larudwer at freenet.de  Sat May 17 06:08:51 2008
From: larudwer at freenet.de (Ruediger)
Date: Sat, 17 May 2008 12:08:51 +0200
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <g0mab2$pkt$1@aioe.org>

urikaluzhny wrote:

> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is
> there?
> Thanks

I usually have the same problem and i came up with an solution like that:

from operator import ne
def test(iterable, value, op=ne):
    _n = iter(iterable).next
    while True:
        _x = _n()
        if op(_x, value):
            yield _x
        else:
            raise StopIteration

l = range(6)
print [x for x in test(l, 4)]

r at linux:~/tmp> python test18.py
[0, 1, 2, 3]



From martin at v.loewis.de  Fri May  2 13:50:39 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 19:50:39 +0200
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>
References: <mailman.465.1209746433.12834.python-list@python.org>
	<31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>
Message-ID: <481B546F.7010609@v.loewis.de>

> Now, I can understand if you don't like the "WindowsError" as that is
> obviously platform specific. The try/except pattern however is the way
> errors are handled in python and the best and most appropriate way to
> deal with it. The above example just shows that at the very least
> there isn't a significant difference in code size between the two
> methods.
> 
> I don't know what the equivalent error is called in *nix but assume it
> is PosixError (it isn't)

The common base class to use here is actually OSError. WindowsError is
a subclass thereof.

Regards,
Martin


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:48:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:48:38 +0200
Subject: python newbie: some surprises
In-Reply-To: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <48240fe6$0$5108$426a34cc@news.free.fr>

v4vijayakumar a ?crit :
> When I started coding in python, these two things surprised me.
> 
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

Then you have a problem with your code editor - not with Python.

> 2. python requires to pass "self" to all instance methods

Nope. Python requires that function used as instance methods take the 
instance as first argument (and that functions used as classmethods take 
the class as first argument). It's the method object's duty to actually 
pass the appropriate object to the function. The rational is that it 
allows to built methods above two more generic constructs (namely: 
functions and the descriptor protocol) instead of having to special-case 
them.

> and I missed ":" often. :)

Your editor should not indent the next line then. Either you failed to 
correctly configure your editor, or it's broken.


From cokofreedom at gmail.com  Wed May  7 10:18:53 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 7 May 2008 07:18:53 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <cf4c2c27-3e80-4059-bf1e-8b395bbf7410@a70g2000hsh.googlegroups.com>

On May 7, 4:08 pm, "parag_p... at hotmail.com" <parag_p... at hotmail.com>
wrote:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
>
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python

Answer, reasons to learn another scripting language;
It provides different techniques to problems,
It is eaiser and clearer to write with a strong community to aid
developers,
Problems can be scaled,
There are a lot of high scale Python projects.

Hope that helped.


From castironpi at gmail.com  Thu May 15 10:12:52 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:12:52 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<482c42d9$0$9669$426a34cc@news.free.fr>
	<1fc6c5b4-f4e6-4a1c-8ab0-b07d7f269a66@l42g2000hsc.googlegroups.com>
Message-ID: <ce8db71f-033c-476b-83f7-ac194a01cdd6@m45g2000hsb.googlegroups.com>

On May 15, 9:07?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:04?am, Bruno Desthuilliers <bruno.
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > castironpi a ?crit :
>
> > > Why can't I write this?
>
> > Because one or more of the "t", "h", "i", "s" keys are missing from your
> > keyboard ?
>
> No; they're all here.

I have

	life1= Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )


From tjreedy at udel.edu  Thu May  1 18:37:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 18:37:55 -0400
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C
	libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
Message-ID: <fvdgnv$ad0$1@ger.gmane.org>


"illume" <renesd at gmail.com> wrote in message 
news:372ae26a-d772-4182-aa4b-64330626d60f at l25g2000prd.googlegroups.com...
| Ah, why is that?

Were any of the reasons given in
http://www.python.org/dev/peps/pep-0011/
unclear?
It appears you are already aware of MS's non-support of Win98

| Seems like a lot of people using it, so it's still worthwhile making
| 2.6 work with win98.

Since the warning was given in 2.5, no one has agreed enough to volunteer 
to do do.





From sjmachin at lexicon.net  Tue May 13 18:31:04 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 22:31:04 GMT
Subject: help with file path exceeding 255 characters
In-Reply-To: <4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
	<4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
Message-ID: <482a16a5@news.mel.dft.com.au>

yguan08 at gmail.com wrote:
> On May 13, 4:38 pm, John Machin <sjmac... at lexicon.net> wrote:
>> ygua... at gmail.com wrote:
>>> I have trouble of obtaining the file size of a file because the
>>> fullpath exceeds 255 characters. I get this message with
>> At the DOS command level, you can do
>>      subst x: very\long\path
>> and then refer to
>>      x:filestem.ext
>> where x is any unused drive letter.
> Good idea. But subst does not see to work with path that has spaces.
> It gives "Incorrect number of parameters"

If any DOS command-line argument includes spaces, you need to quote it.

os.system(r'subst x: "c:\my big fat path\rab oof\etc etc etc"')



From Avowkind at gmail.com  Sun May 18 23:41:11 2008
From: Avowkind at gmail.com (Avowkind)
Date: Sun, 18 May 2008 20:41:11 -0700 (PDT)
Subject: handling xml embedded within xml
Message-ID: <942b091f-48fb-4de1-98f4-5593ecd89864@d19g2000prm.googlegroups.com>

I have a log file within which is contained a dump of an xml message

... rubbish
///asd laksj aslf
<nif_DEBUG time="Fri, 16 May 2008 13:40:17, 330">
<?xml version="1.0" encoding="UTF-8"?>
<ns>
    <PDQ Lang="fr-FR" ID="XM;1928">content</PDQ>
</ns>
</nif_DEBUG>
.. more junk
... then more xml
""")
This example is of course a summary.

I want to write a streaming filter which will throw out all the junk
and just return a series of nice strings of each complete xml
message.  Ideally I also want to filter which messages I am interested
in.

e.g. the output from the above would be
<?xml version="1.0" encoding="UTF-8"?>
<ns>
    <PDQ Lang="fr-FR" ID="XM;1928">content</PDQ>
</ns>

Two problems.
1. clearing away junk that is nothing like XML.
2. handling the <? xml declaration that lies inside the other xml
tags.

the first I can handle relatively simply by reading through the string
until I get what looks like a valid XML tag.  I can then pass the rest
onto an xml parser like xml.sax. However the parser then excepts out
with :
XMLSyntaxError: XML declaration allowed only at the start of the
document

I would like a more forgiving parser that handles bad xml by a call
back that I can just say carry on to.
Bear in mind also I probably will not have the end of the stream while
initially processing.

All suggestions and pointers welcome
Andrew




From bj_666 at gmx.net  Tue May 20 02:55:19 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:55:19 GMT
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>
	<20080520003857.b1823ec1.johnjsal@NOSPAMgmail.com>
Message-ID: <69faunF2uih6aU4@mid.uni-berlin.de>

On Tue, 20 May 2008 00:38:57 -0400, John Salerno wrote:

> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> 
> 
> No, wait! I can do better!
> 
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new] return ''.join(new)
> 
> Wow, list comprehensions are cool.

And it's a misuse of list comprehension here IMHO because they are meant to
build lists, not to cram a ``for``/``if`` loop into a one liner.  You are
building a list full of `None` objects, just to throw it away.

Ciao,
	Marc 'BlackJack' Rintsch


From jr9445 at ATT.COM  Thu May 15 12:21:16 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Thu, 15 May 2008 11:21:16 -0500
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908E6A1C3@brexc51p>



> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of Reedick, Andrew
> Sent: Thursday, May 15, 2008 12:11 PM
> To: globalrev; python-list at python.org
> Subject: RE: exists=false, but no complaint when i open it!?
> 
> >
> > print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> > \trainingsetunzipped\training_set\mv_0000001.txt')
> >
> 
> 
> You're falling victim to string interpolation because of the
> backslashes.  (\n == newline, \N == N).
> 
> Try using a raw string r'filename', instead of 'filename':
> 	print
>
os.path.exists(r'C:\Users\saftarn\Desktop\NetFlixDataSet\trainingsetunz
> i
> pped\training_set\mv_0000001.txt')
> 
> 

Specificially, the \t in '\trainingsetunzipped' and in '\training_set'
were being treated as tab characters.  Ignore my comment about '\N ==
N'.


From sn at sncs.se  Tue May 27 03:47:52 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 00:47:52 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
Message-ID: <7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>

print a statement

let's make it import() if() (C freaks) except() else() what else()

It was just convenient to not have to write those parenthesis

I agree with the OP, of course if you wrote my post after I began look
into this

Parentheses for the people..

I mean, it's not that.... making it a function?

Well I'd have suggested, make a function and call it write()

The name print is a misnormer any case

So it keeps a misleading name and make it a function, thinks it is a
cleanup

Just Add a write() builtin function so can we use that if we want a
function

but keep the print statement, the import statement, the if statement,
the for statement...

Dont make they functions. Or is this just to throw us out?

S...


On May 26, 12:20 pm, Ulrich Eckhardt <eckha... at satorlaser.com> wrote:
> Prisoner at War wrote:
> > On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>
> >> The differences aren't so fundamental or important: it's not an entirely
> >> new language, just some ugly old things are being removed or changed in
> >> incompatible ways (at *some* time it was supposed to happen - but could
> >> not happen on the 2.x series which has to remain backwards compatible)
> >> Also, Python 3.0 will be released simultaneously with 2.6, and there will
> >> be other 2.x releases. Python 2 won't magically disappear from Earth, I
> >> don't think Linux distros will come with Python 3.0 by default anytime
> >> soon (perhaps not before 3.1).
>
> > But I'd read that Python 3 is very different in many important ways.
>
> Yes, and that is the reason it is version 3.x instead of another 2.x. Moving
> to version 3 signals that some changes were done that are _not_ backward
> compatible and not even intended to.
>
> > I read it right there on the Py3K site!  I can't make sense of how,
> > why, even what, exactly, but that's not a misimpression on my part,
> > I certain nonetheless...it's not just cosmetic changes but important
> > ones pertaining to a sort of "linguistic logic" I gather....
>
> Well, cosmetic or important is always in the eye of the beholder. I
> personally would say that they are important cosmetic changes. You don't
> get any new features or a more Touring-complete language suddenly, but it
> will be much more consistent because it doesn't have to maintain wrong
> decisions of the past, like making 'print' a separate statement when a
> function would do.
>
> >> So learning Python with a book targeted to 2.5 isn't a waste of time -
> >> not at all.
>
> > Well, I will be learning Python from the excellent materials available
> > online, to be sure, but a book that I spend money for, well, I have
> > "higher standards" for it, you know, one of which is that it doesn't
> > get superseded so soon!
>
> As already pointed out, Python 2 will not suddenly cease to exist and
> knowledge about it won't suddenly be worthless either. I guess it will take
> a few years until the use of Python 3 supercedes that of Python 2.
>
> Uli
>
> --
> Sator Laser GmbH
> Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From http  Fri May  9 05:48:21 2008
From: http (Paul Rubin)
Date: 09 May 2008 02:48:21 -0700
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <7xabizkdui.fsf@ruckus.brouhaha.com>

dannywebster at googlemail.com writes:
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo').  I need to grab the previous
> iteration if this condition is met.  I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

You cannot rely on the elements of a dictionary being in any
particular order (dicts are internally hash tables), so the above
is almost certainly ont what you want.


From sebey at mac.com  Thu May 29 09:46:09 2008
From: sebey at mac.com (sebey)
Date: Thu, 29 May 2008 06:46:09 -0700 (PDT)
Subject: feedparser html sanitizion how-to disable it
Message-ID: <c7a6a23f-9fcf-4add-9e2e-9202f2895932@25g2000hsx.googlegroups.com>

ok so I know about why its good but I am building a website that
imports rss feeds form external place in this case Talkshoe.com and
feedparser seens to think that podcast.feed.description has html in it
and same with podcast.entries[0].description so how can I disable it

p.s. new to python so baby speak would be greatly appercated thank
you


From mattheww at chiark.greenend.org.uk  Thu May 22 17:14:44 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 22 May 2008 22:14:44 +0100 (BST)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
Message-ID: <8Ot*rIxds@news.chiark.greenend.org.uk>

<s0suk3 at gmail.com> wrote:
> So it seems like you're designing a language for non-programmers.
> That's good, I've never heard about anyone so interested in teaching
> programming for kids and non-programmers. But in that case, you
> shouldn't even be comparing it to Python.

At one time, Guido was very keen on the idea of Python as a language to
introduce non-programmers to (under the 'Computer Programming for
Everybody' slogan).

I think it's rather a shame that this has more-or-less fallen by the
wayside. There are lots of people out there producing buggy
spreadsheets to do things that would be easier to do in a programming
language.

-M-


From squareswallower at yahoo.com  Mon May  5 23:02:06 2008
From: squareswallower at yahoo.com (dave)
Date: Mon, 5 May 2008 21:02:06 -0600
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com>
Message-ID: <fvohne$m0f$1@news.xmission.com>

On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arnodel at googlemail.com> said:

> dave <squareswallower at invalid.com> writes:
> 
>> Hello,
>> 
>> I made a function that takes a word list (one word per line, text
>> file) and searches for all the words in the list that are 'shifts' of
>> eachother.  'abc' shifted 1 is 'bcd'
>> 
>> Please take a look and tell me if this is a viable solution.
>> 
>> def shift(word, amt):
>> 	ans = ''
>> 	for letter in word:
>> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>> 	return ans
> 
> In Python, if you want to build a string from lots of parts you can
> use ''.join(parts).  I think it is considered more efficient.


what would be the best way to write a "ans = ans + chr" into a 
''.join(parts) ??




From waldemar.osuch at gmail.com  Sat May  3 15:07:21 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Sat, 03 May 2008 19:07:21 GMT
Subject: Python and SOAP status
In-Reply-To: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <JJ2Tj.111566$rd2.71630@pd7urf3no>

Heikki Toivonen wrote:
> I have started researching the Python SOAP (and web services in general)
> options out there. Python 2.5 should be supported.
> 
> I used Python for some web services stuff (demo quality) a few years
> back without major problems. However, it seems many of the libraries I
> remember from that time have become dormant or have been explicitly
> discontinued. A colleague also commented that he run into lots of
> problems trying to use Python for SOAP a year ago.
> 
> What is your experience with Python SOAP, WSDL etc. libraries? What are
> the good, maintained options out there right now? How is standards
> compliance, how robust are the libraries, how do they interoperate with
> other libraries written in other languages (I am especially interested
> in interoperability with Java and PHP web services stacks).
> 
> It seems like the top 3 candidates on my list are ZSI
> (http://pywebsvcs.sourceforge.net/), soaplib
> (http://trac.optio.webfactional.com/) and suds
> (http://trac.optio.webfactional.com/). If you have any experience in
> using these, I'd very much like to hear from you.
> 
> There was quite a depressing post about ZSI's status at
> http://www.kunxi.org/archives/2008/01/pythonsoap-second-encounter/.
> 

I had good experience using soaplib as the server and Java client.

For the client side I found elementsoap (http://effbot.org/downloads/)
to be useful on a couple occasions.

Waldemar


From jamesd at echeque.com  Mon May 19 20:47:50 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 10:47:50 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>

I am just getting into python, and know little about it, and am
posting to ask on what beaches the salt water crocodiles hang out.

1.  Looks to me that python will not scale to very large programs,
partly because of the lack of static typing, but mostly because there
is no distinction between creating a new variable and utilizing an
existing variable, so the interpreter fails to catch typos and name
collisions.  I am inclined to suspect that when a successful small
python program turns into a large python program, it rapidly reaches
ninety percent complete, and remains ninety percent complete forever.

2.  It is not clear to me how a python web application scales.  Python
is inherently single threaded, so one will need lots of python
processes on lots of computers, with the database software handling
parallel accesses to the same or related data.  One could organize it
as one python program for each url, and one python process for each
http request, but that involves a lot of overhead starting up and
shutting down python processes.  Or one could organize it as one
python program for each url, but if one gets a lot of http requests
for one url, a small number of python processes will each sequentially
handle a large number of those requests.  What I am really asking is:
Are there python web frameworks that scale with hardware and how do
they handle scaling?

Please don't read this as "Python sucks, everyone should program in
machine language expressed as binary numbers".  I am just asking where
the problems are.
--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From nayden at gmail.com  Fri May 23 17:14:27 2008
From: nayden at gmail.com (nayden)
Date: Fri, 23 May 2008 14:14:27 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
Message-ID: <03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>

and then I try to restore the object with the following code

def success(rv):
    print "success"
    str =  cStringIO.StringIO(libpq.PgUnQuoteBytea(rv[0][0]))
    i = cPickle.load(str)
    i.toString()

the execution fails just after the print statement, and I am not quite
sure why is that.

I would love to find out what people are using when they need to do
something similar --
perhaps I am trying to do it the perl way, while there is an elegant
python solution.

thanks


From sjdevnull at yahoo.com  Fri May 16 13:59:52 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Fri, 16 May 2008 10:59:52 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <2e4d8e9c-7c10-4567-b4cf-d0d7aca2e62f@c65g2000hsa.googlegroups.com>

On May 16, 12:24 pm, "inhahe" <inh... at gmail.com> wrote:
> "D'Arcy J.M. Cain" <da... at druid.net> wrote in messagenews:mailman.1232.1210952591.12834.python-list at python.org...
>
>
>
> > 2. Once the code is functioning, benchmark it and find the
> > bottlenecks.  Replace the problem methods with a C extension.  Refactor
> > (and check your unit tests again) if needed to break out the problem
> > areas into as small a piece as possible.
>
> There's probably only 2 or 3 basic algorithms that will need to have all
> that speed.
>
>
>
> > 3.  If it is still slow, embed some assembler where it is slowing down.
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.

You won't know if the C is faster than the assembly until you write
it, and if you're going to do that you might as well use it...

If the C is fast enough, there's no point in wasting time writing the
assembly.

(Also FWIW C and C++ are different languages; you seem to conflate the
two a few times upthread).


From venable.devin at gmail.com  Thu May 29 21:43:56 2008
From: venable.devin at gmail.com (Devin)
Date: Thu, 29 May 2008 18:43:56 -0700 (PDT)
Subject: sharding research with pyshards
Message-ID: <934f5f2d-7a3a-4209-83ea-c674fec32666@w7g2000hsa.googlegroups.com>

If anyone is interested in sharding or horizontal partitioning, I've
started an open source project on Google Code with the intent of
building a general purpose sharding framework for python using MySQL.
If you have an interest in this area of research, please come on over
and get involved.

http://code.google.com/p/pyshards/

Devin Venable


From frikker at gmail.com  Mon May 19 15:04:46 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 12:04:46 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
Message-ID: <8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>

How is it that you recommend killing a pure python thread? And also,
when i use the 'threading' module am I creating a process, or a (gasp)
thread? (Is this an obvious question - and if so, how does one create
a 'process'?)

Thanks!


From efurman at admailinc.com  Thu May  1 14:24:25 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 01 May 2008 10:24:25 -0800
Subject: os.open and O_EXCL
Message-ID: <481A0AD9.8050502@admailinc.com>

Greetings!

I am trying to lock a file so no other process can get read nor write 
access to it.  I thought this was possible with os.open(filename, 
os.O_EXCL), but that is not working.  I am aware of the win32file option 
to do file locking, so my question is this:  what is the purpose of the 
os.O_EXCL flag?

Thanks for any help.
--
Ethan
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From paul.hankin at gmail.com  Wed May 21 02:38:41 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 23:38:41 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <f7d0c496-9d65-4985-b3de-b232cfb16026@l42g2000hsc.googlegroups.com>

On May 20, 7:34?pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i ?can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
> ? ? ? ? do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

import itertools

mov = open(afile)
for line in itertools.islice(mov, 1, None):
    do y

--
Paul Hanin


From kyosohma at gmail.com  Thu May  8 17:15:10 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 8 May 2008 14:15:10 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <5016e80c-a02a-4ee8-acbb-8aadd3877251@k37g2000hsf.googlegroups.com>

On May 8, 4:10?pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.
>
> Joe

I can't speak for Tkinter, but wxPython has lots of widgets to choose
from and a number of developers that create custom widgets. They have
a page on their wiki devoted to custom widgets here:

http://wiki.wxpython.org/CreatingCustomControls

And here's another article:

http://www.zetcode.com/wxpython/customwidgets/

I find their mailing list to have extremely knowledgeable users that
are happy to help newbs too. Hopefully someone with Tkinter experience
can tell you about it robustness or lack thereof.

Mike


From upton at virginia.edu  Thu May 15 10:26:18 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 10:26:18 -0400
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805150726g7e3f79f4gce38b5d0b8cd231f@mail.gmail.com>

On Thu, May 15, 2008 at 9:32 AM, castironpi <castironpi at gmail.com> wrote:
> Why can't I write this?
> --

Because your antecedent is undefined?


From deets at nospam.web.de  Thu May 22 10:59:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 16:59:00 +0200
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
Message-ID: <69lg2iF33qnpqU1@mid.uni-berlin.de>

s0suk3 at gmail.com wrote:

> On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>>
>> > Hi, I wanted to know how cautious it is to do something like:
>>
>> > f = file("filename", "rb")
>> > f.read()
>>
>> > for a possibly huge file. When calling f.read(), and not doing
>> > anything with the return value, what is Python doing internally? Is it
>> > loading the content of the file into memory (regardless of whether it
>> > is discarding it immediately)?
>>
>> I am not a Python interpreter developer, but as user, yes I'd expect that
>> to happen. The method doesn't know you are not doing anything with its
>> return value.
>>
>> > In my case, what I'm doing is sending the return value through a
>> > socket:
>>
>> > sock.send(f.read())
>>
>> > Is that gonna make a difference (memory-wise)? I guess I'm just
>> > concerned with whether I can do a file.read() for any file in the
>> > system in an efficient and memory-kind way, and with low overhead in
>> > general. (For one thing, I'm not loading the contents into a
>> > variable.)
>>
>> Doesn't matter. You allocate a string in which the contents is loaded
>> (the return value of 'f.read()', and you hand over (a reference to) that
>> string to the 'send()' method.
>>
>> Note that memory is allocated by data *values*, not by *variables* in
>> Python (they are merely references to values).
>>
>> > Not that I'm saying that loading a huge file into memory will horribly
>> > crash the system, but it's good to try to program in the safest way
>> > possibly. For example, if you try something like this in the
>>
>> Depends on your system, and your biggest file.
>>
>> At a 32 bit platform, anything bigger than about 4GB (usually already at
>> around 3GB) will crash the program for the simple reason that you are
>> running out of address space to store bytes in.
>>
>> To fix, read and write blocks by specifying a block-size in the 'read()'
>> call.
> 
> I see... Thanks for the reply.
> 
> So what would be a good approach to solve that problem? The best I can
> think of is something like:

You are aware that read() takes an int-argument to limit the number of bytes
returned, and of course advances the internal seek-pointer for you?

Diez


From darcy at druid.net  Fri May  2 11:07:55 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 11:07:55 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87bq3ozs09.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
Message-ID: <20080502110755.85e2ea4e.darcy@druid.net>

On Sat, 03 May 2008 00:43:02 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Roy Smith <roy at panix.com> writes:
> > Have you ever shipped software to a customer?
> 
> Yes, and all parties have been quite happy with the results.

When some of us talk about shipping software we aren't talking about a
20 line script delivered to our uncle's construction company office.  We
are talking about millions of lines of code in thousands of programs and
modules that has to run out of the box on whatever system the client
happens to run on.

> > Customer: "I can't install it there because <insert whatever silly
> > reason the customer has>. If you can't make your product work
> > without requiring me to install python in /usr/bin, I'm afraid I
> > can't buy your product".
> 
> At this point they have the simple option of running the program with
> 'python /path/to/the/program'. It's certainly not a case of "can't
> make the product work".

Simple for your 20 line single script.  Not so simple for my million
line, integrated system that has to work everywhere.

> It is, however, a case of "can't automatically account for every local
> customisation sysadmins choose to make on their systems". Perfectly
> willing to work with them to get their specific environment working,
> but as a matter of simple economics it's not worth my time to attempt
> to make such corner cases work automatically.

If by "corner case" you mean "some system that I don't personally run"
then OK but to some of us your system is the corner case and we would
like our code to run there as well.

Real software has to deal with the fact that support costs money.
You may be able to deal with one or two clients that way but that does
not scale very well.

> If they've already chosen to install Python to some unpredictable
> location, they know what they're doing enough to invoke the program in
> a specific way to get it working.

Unpredictable to you.  Perfectly predictable on their system.

I do believe I am done with this thread.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From malaclypse2 at gmail.com  Wed May 21 08:49:56 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 21 May 2008 08:49:56 -0400
Subject: Database Query Contains Old Data
In-Reply-To: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
Message-ID: <16651e80805210549o16853e87h6f91be981f65fa43@mail.gmail.com>

On Wed, May 21, 2008 at 6:30 AM,  <giraffeboy at gmail.com> wrote:
> The first time you run a report, everything works as expected but if
> you run it a second time, after modifying data, it seems that the data
> from before the modification is selected on the second report run.

Did you remember to commit your changes before re-running the report?
Python's DB API requires that any auto-commit feature of the
underlying database be turned off by default, so you are required to
commit changes yourself.  If you're used to having auto-commit turned
on, this can be confusing.

See http://www.python.org/dev/peps/pep-0249/ for more details of
python's DB API.

-- 
Jerry


From jeffober at gmail.com  Thu May  1 08:00:13 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 05:00:13 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <bc1b3843-90df-429b-9f3e-3a61d2bc5b86@f63g2000hsf.googlegroups.com>

Look at the pickle and marshal modules.


From bruno.desthuilliers at gmail.com  Wed May  7 18:44:10 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:44:10 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <0ce7b198-ce01-4565-bc0c-95a87102589f@e39g2000hsf.googlegroups.com>

On 7 mai, 23:38, globalrev <skanem... at yahoo.se> wrote:
> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
>                 return lambda x,inc=n: x+inc

It returns a function that accept one argument and return the result
of the addition of this argument with the argument passed to addn.

FWIW, Python's lambda is just a shortcut to create a very simple
function, and the above code is canonically written as:

def makeadder(n):
  def adder(x):
    return n + x
  return adder

> if i do addn(5) it returns
>
(snip)

> <function <lambda> at 0x01D81830>
>
> ok? so what do i write to make it actually do something.

add5 = addn(5)
add5(1)
=> 6
add5(2)
=> 7

add42 = addn(42)
add42(1)
=> 43

> and is the
> inc=n necessary i cant do x+n?

In this case, it's not. This version does exactly the same thing
AFAICT:

def addn(n):
    return lambda x: x+n



From gherron at islandtraining.com  Wed May 14 01:03:39 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 22:03:39 -0700
Subject: What is self.file = file for?
In-Reply-To: <670cc5db0805131532y32c2b938y6fcd7a5592a70f64@mail.gmail.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>	
	<482A154C.1030204@islandtraining.com>
	<670cc5db0805131532y32c2b938y6fcd7a5592a70f64@mail.gmail.com>
Message-ID: <482A72AB.4080000@islandtraining.com>

Chester wrote:
> I see. A very good explanation indeed. Thank you for it. But why would
> anyone want to do this anyway?
>   

In a single sentence, OOP (Object Oriented Programming) is a way to 
organize a program around your data and the operations on that data.  
Many books and college courses are dedicated to OOP.  Years could be 
spent learning to apply its concepts.  A web search would find a flood 
of such information.

Gary Herron
>
>
>
> On Wed, May 14, 2008 at 12:25 AM, Gary Herron
> <gherron at islandtraining.com> wrote:
>   
>> wxPythoner at gmail.com wrote:
>>
>>     
>>> Hello!
>>>
>>> I have trouble understanding something in this code snippet:
>>>
>>> class TextReader:
>>>    """Print and number lines in a text file."""
>>>    def __init__(self, file):
>>>        self.file = file
>>>        .
>>>        .
>>>        .
>>>
>>>
>>> When would you do a thing like  self.file = file  ? I really don't
>>> find an answer on this. Please help me understand this.
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>>
>>>       
>>  If you know about Object-Oriented Programming this should make sense.  If
>> you don't, then you have some reading/learning to do first.
>>
>>  When someone wants to create an object of type TextReader, they must supply
>> a value
>>   ob = TextReader(v)
>>  That calls the __init__ constructor with the supplied value of v in the
>> variable named file.
>>  If the object being created wants to record the value for future use, then
>> the line
>>   self.file = file
>>  does just that.   "self" is the name of the object being created,
>> "self.file" is an attribute named "file" of that object, and the assignment
>> stores the supplied value there.
>>
>>  Gary Herron
>>
>>
>>
>>     



From bruno.desthuilliers at gmail.com  Wed May 14 16:30:04 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:30:04 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
Message-ID: <844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>

On 14 mai, 18:20, castiro... at gmail.com wrote:
> I'm concerned over the future of Python.  Should tuples be named?

Obviously not, unless they should.


From informfr at gmail.com  Mon May 12 21:26:55 2008
From: informfr at gmail.com (JL)
Date: Mon, 12 May 2008 18:26:55 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <24d18f4d-45c2-4009-8f02-1b9dd9ddfd96@m36g2000hse.googlegroups.com>

If the game runs normally without IDLE, then, to run it from IDLE, add
pygame.quit() at the end of the script:

if __name__ == "__main__":
    MainWindow = PyManMain()
    MainWindow.MainLoop()
    pygame.quit()

... and just before the sys.exit():

    def MainLoop(self):
        """This is the Main Loop of the Game"""
        while 1:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    sys.exit()


From fc14301589 at icqmail.com  Thu May 22 02:57:16 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 14:57:16 +0800
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
Message-ID: <48351958_2@news.tm.net.my>

On 22:26, mercoled? 21 maggio 2008 zhf wrote:

> I want ro walk a directory and its sub directory on linux

os.path.walk() should do the job.
Recursively you should try this, which I found on some web site:

8<---------8<---------8<---------8<---------8<---------8<---------

def file_find(folder, fname):
    """search for a filename fname starting in folder"""
    for root, dirs, files in os.walk(folder):
        for file in files:
            # make search case insensitive
            if fname.lower() == file.lower():
                return Path.join(root, fname)

8<---------8<---------8<---------8<---------8<---------8<--------

Definitely I don't know about path with spaces or Unicode file names.




From gneuner2/ at /comcast.net  Sat May 10 21:26:54 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Sat, 10 May 2008 21:26:54 -0400
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <vdhc245g2fh8que71re3beuok2i5e8snm9@4ax.com>

On Fri, 9 May 2008 22:52:30 -0700 (PDT), "xahlee at gmail.com"
<xahlee at gmail.com> wrote:

>In the past weeks i've been thinking over the problem on the practical
>problems of regex in its matching power. For example, often it can't
>be used to match anything of nested nature, even the most simple
>nesting. It can't be used to match any simple grammar expressed by
>BNF. Some rather very regular and simple languages such as XML, or
>even url, email address, are not specified as a regex. (there exist
>regex that are pages long that tried to match email address though)

What's your point?  The limitations of regular expressions are well
known.

>After days of researching this problem, looking into parsers and its
>theories etc, today i found the answer!!
>
>What i was looking for is called Parsing Expression Grammar (PEG).

PEG has its own problems - it's very easy with PEG to create subtly
ambiguous grammars for which quite legal looking input is rejected.
And there are no good tools to analyze a PEG and warn you of subtle
problems.

Chris Clark (YACC++) has posted at length about the merits, problems
and limitations of various parse techniques - including PEG - in
comp.compilers.  Before you consider doing anything with PEG I suggest
you look up his posts and read the related threads.


>It seems to me it's already in Perl6, and there's also a
>implementation in Haskell. Is the perl6 PEG is in a usable state?
>
>Thanks.
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/

George
--
for email reply remove "/" from address


From cwitham at summit-systems.com  Tue May 13 14:50:23 2008
From: cwitham at summit-systems.com (Carl  Witham)
Date: Tue, 13 May 2008 14:50:23 -0400
Subject: Summit Systems
Message-ID: <0A6665114EE5F743BCEB62B4C8FF323A01284F40@morpheus>

Good afternoon.

I am in dire need of a engineer with Python experience.

Currently the 4 month contract assignment is for a Software Test
Engineer to assist in creating software. 

In this role candidates will write test plans and test cases from
requirements or design specifics; Create test programs and tools for the
software components at both unit and system level; Execute and analyze
the results of the tests, both automated and manual ; Set up, configure
and maintain a variety of test environments; Isolate problems and log
bugs. Essential skills include experience with software lifecycles;
Experience in writing and performing software test plans; 

Experience with Linux, C/C++ and Python scripting languages, and
networking technologies; System administration in Linux preferred,
Windows a plus

If you, or someone in your network, could assist me with this - I
certainly would appreciate a call.

Thanks or your time.

Carl Witham
Technical Recruiter
Summit Systems
A Division of Summit Technical Services
Local:      781-794-3294 x 1133
Toll free:  877-800-8303 x 1133
Fax:         781-849-7327
cwitham at summit-systems.com
www.summit-systems.com <http://www.summit-systems.com/> 


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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:18:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:18:33 +0200
Subject: Calling class method by name passed in variable
In-Reply-To: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
Message-ID: <48366fb1$0$4879$426a74cc@news.free.fr>

Sagari a ?crit :
> Greetings,
> 
> Can someone suggest an efficient way of calling method whose name is
> passed in a variable?
> 

method = getattr(obj, 'method_name', None)
if callable(method):
     method(args)


From mailpitches at email.com  Fri May  2 13:15:03 2008
From: mailpitches at email.com (mp)
Date: Fri, 2 May 2008 10:15:03 -0700 (PDT)
Subject: Non-blocking connect
Message-ID: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>

Code is at bottom. Basically, if I turn off socket blocking prior to
connecting, I get a "Socket is not connected" error when I try to send
data. However, if I do not turn off blocking, OR if I place a print
statement anywhere before the send call, it works! WTF?

I'd like to understand what's going on in the background here, if you
know don't skimp on the details.

Thanks

---------------------------------------------------------------
import
socket
sock = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
sock.setblocking(0)
sock.connect_ex(('localhost',
9000))
sock.setblocking(1)
sock.send('foo')
sock.close()


From arnodel at googlemail.com  Tue May 13 16:25:39 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 21:25:39 +0100
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
Message-ID: <m2d4nqar3w.fsf@googlemail.com>

globalrev <skanemupp at yahoo.se> writes:

> i cant figure outif python has lexical or general scope.
>
> it seems functions have lexical scope but with some restrictions and
> some non-function scopes are dynamic?

I can't think of any instance of dynamic scoping in Python.  Can you
give an example of what you are thinking of?

AFAIK, Python has lexical scoping, with the restriction that
non-global non-local names cannot be rebound.

-- 
Arnaud


From enleverlesX.XmcX at XmclaveauX.com  Fri May 23 14:48:28 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Fri, 23 May 2008 20:48:28 +0200
Subject: Python is slow
In-Reply-To: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
Message-ID: <4837125e$0$862$ba4acef3@news.orange.fr>

Bonsoir !

Perso, je pense que des pr?cisions comme celles de Bruno sont tr?s 
utiles, car elles ?vitent les d?rives, et l'apparition de langages 
b?tards, et impurs (pythonesquement parlant).

Non aux Pythons OGM !!!

Toutefois, iles est dommage que je comprenne pas l'anglais, et donc pas 
vraiment son message/discours...

@+

Michel Claveau



From univbgp100 at gmail.com  Fri May 30 05:49:40 2008
From: univbgp100 at gmail.com (Dhanabal)
Date: Fri, 30 May 2008 02:49:40 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP and more...
Message-ID: <4b6a813b-c3b0-43e3-83ca-fbf243244ecf@y22g2000prd.googlegroups.com>

access all computer tutorials for free visit http://freecomputertutorialz1.blogspot.com/


From martin at v.loewis.de  Thu May  1 11:41:35 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 17:41:35 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
	<675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
Message-ID: <4819E4AF.4060103@v.loewis.de>

> Martin, could you please tell me how to do this, I am pretty new in
> Solaris.

It's fairly complicated, so I'm not sure I can give you the full
tutorial in a Usenet message.

In essence, you need to spot the linker line in the build process,
(e.g. by the -o option to the compiler), and add -lm to it.

If you cannot do this on your own, I recommend you hire somebody
who can.

Regards,
Martin


From alex.m.gusarov at gmail.com  Thu May 29 07:27:43 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 18:27:43 +0700
Subject: Unit tests?
Message-ID: <ac6dcb3d0805290427y1a003db1ya7d1685822ad5135@mail.gmail.com>

Hello, it seems that I have a problem - I almost finished my program
and it's necessary to test it. But I've never do it before. I even
don't know how I can do it.
Please, give me some links to testing techniques, either common or
specific to Python.
I searched in Google for information, but 'cause I don't know anything
about subject, I don't know where to start from.

Thanks
--
Best regards, Alex Gusarov


From malaclypse2 at gmail.com  Fri May  2 15:17:20 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 2 May 2008 15:17:20 -0400
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <16651e80805021217o72312627n1b1dad6c88721301@mail.gmail.com>

On Fri, May 2, 2008 at 3:04 PM, TkNeo <tarun.kap at gmail.com> wrote:
>  ofcouse try catch is going to work but in ideality the index function
>  should return a -1 and no way in hell crash.

It doesn't crash.  It raises an exception.  This is a pretty
fundamental concept of python programming.  If you intend to program
in python, then you're going to have to deal with it.

Besides, returning -1 is a bad idea.  Take a look at the following:

lst = [1, 2, 3]
pos = lst.index(99)
lst[pos] = 0
print lst

What do you expect the result to be?  If lst.index(99) returned -1,
then lst would be [1, 2, 0], because negative indexes of a list are
perfectly valid in python -- they just count from the end of the list.

-- 
Jerry


From hniksic at xemacs.org  Thu May 15 13:02:39 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 15 May 2008 19:02:39 +0200
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org>
Message-ID: <87lk2ba4b4.fsf@mulj.homelinux.net>

"John Krukoff" <jkrukoff at ltgc.com> writes:

> I'd love to know how Java handles all that automatically through a
> generic stream interface, though.

It could be that their stream interface supports seek(), and that
seek()ing on HTTP connection sends the appropriate range request and,
if it fails, throws an appropriate exception which the client code
interprets as "seeking impossible, read the whole file".

But that doesn't apply to the InputStream interface described at
http://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStream.html -- no
seeking there.


From bj_666 at gmx.net  Fri May  2 02:56:59 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 06:56:59 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
Message-ID: <67vs9qF2r409aU2@mid.uni-berlin.de>

On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:

> Of course it's not thread safe.   For the same reason and more basic, 
> even the expression i++ is not thread safe in C++.
> 
> Any such calculation, on modern processors, requires three operations: 
>   retrieve value of i into a register,
>   increment the register
>   write the value into i.

There are no modern processors with an opcode for incrementing a memory
location!?  At least my C64 can do that.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From ludvig.ericson at gmail.com  Tue May 13 12:35:14 2008
From: ludvig.ericson at gmail.com (ludvig.ericson at gmail.com)
Date: Tue, 13 May 2008 09:35:14 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>
Message-ID: <cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>

> In a pure world, the only writing that is done would be within the
> handle_send() callbacks within the select loop. ?Then again, in a
> perfect world, calling readable() and writable() would have no strange
> side affects (as your example below has), and all push*() calls would
> be made within the handle_*() methods.

It wouldn't have those side-effects if push really just pushed. :-P

> We do not live in a pure world, Python isn't pure (practicality beats
> purity), and by attempting to send some data each time a .push*()
> method is called, there are measurable increases in transfer rates.

-- 8< --

> Yes, it would be convenient to not have push*() actually send data
> when called in some cases, but in others, the increase in data
> transfer rates and/or reduction in latency is substantial.

If it increases transfer speed that much, the calling application
almost has to be broken, or at least not designed as it should be - of
course there are such applications, but you know...

Anyway, I went for a subclassing way of dealing with it, and it works
fine.

Thanks for the reply though, hadn't considered possibly "flawed"
applications where the asyncore loop isn't revisited as often as it
should. :->
Ludvig


From castironpi at gmail.com  Fri May 16 09:35:50 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:35:50 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
Message-ID: <57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com>

On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
>
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Kay Schluehr a ?crit :
>
> > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > >> Hello all,
>
> > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > >> It appeared to be the following:
>
> > >> class A(object):
> > >> ? ? pass
>
> > >> print min(1.0, A())
>
> > >> which is accepted by Python even though the A() object is not numerical in
> > >> nature.
>
> > >> The cause of this behavior seems to be the compare operation of the object
> > >> class.
>
> > >> Is there a way to disable this behavior in Python (other than deriving a new
> > >> 'object-like' class that doesn't do comparisons?)
>
> > > Are you sure you don't want to use a statically typed language that
> > > captures all type errors just by inspecting your source code?
>
> > This is not necessarily a static vs dynamic typing problem. The
> > following code will raise a TypeError for very good reasons:
>
> > ? ? print 1.0 + A()- Hide quoted text -
>
> > - Show quoted text -
>
> I question the real-world examples of coercion, casting, and
> upcasting. ?C insists that defining by operator, which may or may not
> relate to system, is the only legal move. ?I doubt operator+ is well-
> defined on non-ideal structures. ?Rationals are not floats, but system
> got checked. ?Define concurrency.- Hide quoted text -
>
> - Show quoted text -

I would be bouncing localcy and remoticy.  What word's on the bar?


From deets at nospam.web.de  Wed May 28 18:07:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 00:07:07 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
	<4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>
Message-ID: <6a63cgF34irclU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>> Kind of like how this year's program won't work on next year's
>>> Python?
>> For somebody who has admitted to have only very rudimentary knowledge of
>> python that's a pretty bold statement, don't you think?
> 
> Everthing I know, I learned from Wikipedia. ;)
> 
> http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_and_compatibility
> 
> "Like Perl 6, Python 3.0 will break backward compatibility. There is
> no requirement that Python 2.x code will run unmodified on Python 3.0.
> There are basic changes such as changing the print statement into a
> print function (so any use of the print statement will cause the
> program to fail) ..."

You should read further:

"""
However, a tool called "2to3" does most of the job of translation, 
pointing out areas where it wasn't sure using comments or warnings. Even 
in an alpha stage 2to3 appears to be fairly successful at performing the 
translation.
"""

And all this is about Py3k- nobody forces anybody to leave python 2.x 
series.

I think you should contort yourself a bit wrt backwards compatibility 
and stability - given that FT is by no means an established and 
productive tool.

Diez


From python at bc90021.net  Sun May 11 16:11:28 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 20:11:28 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga> <m21w484o4e.fsf@googlemail.com>
Message-ID: <QpIVj.32520$KJ1.5565@newsfe19.lga>

[CUT]
> I have in no way assumed that you are stupid.  I have tried to help you
> formulate your problem better so that people on the list can help you. 
> I believe I have done so respectfully, with the aim of introducing you
> to the modus operandi of this group.

I appreciate your help.  However, the comments I got from other people 
that "I'm sure you have quotes here..." type comments are incredibly 
insulting.  To tell someone that you're sure that they have quotes around 
something when they don't is the height of arrogance and rudeness.

>> (I really must say that so far the help I am getting in the Python
>> community is a big let down.  Whether it's on IRC or here, everyone has
>> an arrogance that I don't find anywhere else in the open source
>> community, and it seriously makes me question the choice of language
>> that I've made.)
> 
> Don't judge too quickly.  I think this newsgroup is on the whole
> extremely helpful.  I have learnt a lot from it.  But you have to get
> used to its ways, and until you are familiar with them, approach it with
> humility.

Unfortunately, this is not my first interaction with the Python IRC 
communities or Python newsgroups.  I had tried working with this language 
a while back (around 2000) and the answers I got were unhelpful and 
usually rude.  I decided to give it another shot for the program I'm 
writing, and I'm regretting that.  It's possible that I'm to blame - I'm 
the common factor in both instances, but at the same time, when you ask a 
question in #python and NO ONE ANSWERS at all, and they all just sit 
there not talking at all, what's the point of having the IRC channel?  If 
newbies can't go there for help, what's the point?  When there are 70 
people in a channel, and no one even acknowledges your question has been 
asked, where does one go for help?  It's like talking to yourself.

>> The error message was at the top of the thread (am I incapable of
>> posting it, or are you incapable of following a thread?), but here it
>> is again:
>>
>> IOError: [Errno 2] no such file u'tempfileName'
> 
> This is different from the error message that you posted in your
> original message.
> 
> Anyway, what is useful to us is a full traceback, no just an error
> message.

It is not "different" except that I posted the full name the second 
time.  (tempfileName instead of the previously simplified fileName)  The 
code itself is actually irrelevant, in my humble opinion.  In one place a 
file creation line does not work; in the second place it does.  How can 
the same line of code do two different things in two places?  Either it 
creates a file or it doesn't.  It should create the file in either place, 
regardless of where it's being called.

Either way, I figured it out.


From fetchinson at googlemail.com  Mon May 12 13:19:55 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 12 May 2008 10:19:55 -0700
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>

> >>  Again a noob question.
> >>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
> >> correct to conclude that there is no RDBMS agnostic, single/uniform DB
> >> access API for Python ?
> >> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> >>  How is the RDBMS change handled for solutions which need to work with
> >> different RDBMSs ??
> >>
> > http://www.python.org/dev/peps/pep-0249/
> >
>
>
> That appears to be only an API specification. Are there any implementations
> of that ?

For sqlite: http://oss.itsystementwicklung.de/trac/pysqlite/ if you
have python < 2.5 for 2.5 and up it is included in the stdlib

For mysql: http://sourceforge.net/projects/mysql-python

There are a tons more, including postgresql, oracle, etc:
http://wiki.python.org/moin/DatabaseInterfaces

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From zentraders at gmail.com  Sat May 10 11:01:05 2008
From: zentraders at gmail.com (Zentrader)
Date: Sat, 10 May 2008 08:01:05 -0700 (PDT)
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>

I like New Mexico Tech's site as well.  Also, take a look at the PMW
extension for additional widgets, and TkTable and/or TableListWrapper.
http://infohost.nmt.edu/tcc/help/pubs/tkinter/


From lac at openend.se  Tue May 27 09:13:28 2008
From: lac at openend.se (Laura Creighton)
Date: Tue, 27 May 2008 15:13:28 +0200
Subject: looking for membership management software -- Open Source,
	written in Python 
In-Reply-To: Message from miller.paul.w@gmail.com of "Mon,
	26 May 2008 12:38:28 PDT."
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>
References: <mailman.1613.1211812586.12834.python-list@python.org>
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>
Message-ID: <200805271313.m4RDDSTM019094@theraft.openend.se>

In a message of Mon, 26 May 2008 12:38:28 PDT, miller.paul.w at gmail.com writes:
>I forgot to ask: what's your target platform?  I mentioned Organizer's
>Database, but it only runs on Windows.  If you need a Linux or OS X
>solution, then I can make another suggestion. :-)

Ah, FreeBSD would be the best -- as in making our sysadmins very, very
happy but linux would also be very acceptable, and probably OS X as well.
But PHP is probably not.

Thanks again,
Laura



From sarenius at sun3.oulu.fi  Sun May 25 13:13:14 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 17:13:14 +0000 (UTC)
Subject: UTF problem?
Message-ID: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>

I am trying to set up Linux printing via Windows XP and using this HOWTO:

http://justin.yackoski.name/winp/

I have one problem. When I send a file via CUPS to the windows spool
directory dirwatch.py (http://justin.yackoski.name/winp/dirwatch.txt) dies
and gives:

UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0'
in position 77: ordinal not in range (128)

I think that this has something to do with UTF-8 what I do not know is how
to get over it? 

So could someone please help me to get dirwatch.py script to understand my
filenames (which, btw, do not have any non-ascii symbols, and will work
if I manually copy-rename them).

Thanks in advance!

Vesa-Matti 

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *





From benjamin.kaplan at case.edu  Tue May 27 11:33:30 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 27 May 2008 11:33:30 -0400
Subject: New chairman
In-Reply-To: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805270833u77f5aae2u6a8af0d3376501e8@mail.gmail.com>

On Tue, May 27, 2008 at 11:26 AM, Sverker Nilsson <sn at sncs.se> wrote:

> I dont want to be a new Guido. Somebody else please.
>
> S.
>
>
> On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> > I was talking about Guido van Rossum
> >
> > The one who decides, so far when people agree
> >
> > But we can make a new fork
> >
> > He is the originator, but now it seems, for me, it is hanging out in
> > the air
> >
> > So we need some new leadership
> >
> > From somebody, somebody like you perhaps. Or me.
> >
> > Sverker
> >
> > On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> > wrote:
> >
> > > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
> >
> > > > seems to be needed
> >
> > > > He doesn't seem to care much anyway now
> >
> > > > Or if he cares, he have many other assignments
> >
> > > Who are you talking about?
> >
> > > > So should we try to elect a new chairman?
> >
> > > Chairman? Elaborate please.
> >
> > > > I am probably not eligible. There must be many others.!
> >
> > > > Do you dare?consper
> >
> > > Hm, are you and castrionpi twin brothers or something?
> >
> > > > S.
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
> >
> > > --
> > > Wbr, Andrii Mishkovskyi.
> >
> > > He's got a heart of a little child, and he keeps it in a jar on his
> desk.
>

Andrii, I think you were right. He must be related to castrionpi somehow.
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From workitharder at gmail.com  Wed May 21 15:02:09 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 12:02:09 -0700 (PDT)
Subject: best way to check if pid is dead?
Message-ID: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>

Does anyone have a pythonic way to check if a process is dead, given
the pid?

This is the function I'm using is quite OS dependent. A good candidate
might be "try: kill(pid)", since it throws an exception if the pid is
dead, but that sends a signal which might interfere with the process.

Thanks.
--Buck


From gagsl-py2 at yahoo.com.ar  Thu May 15 09:59:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 10:59:41 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
Message-ID: <op.ua67trlmx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich <dullrich at sprynet.com> escribi?:

> Having a hard time phrasing this in the form
> of a question...
>
> The other day I saw a thread where someone asked
> about overrideable properties and nobody offered
> the advice that properties are Bad. So maybe we've
> got over that. I suppose properties could have
> Bad consequences if a user doesn't know they exist
> and think that a certain property of an object is
> just an ordinary attribute. But that applies to
> almost any aspect of any language.

Which "bad consequences" are you thinking of? Apart from the user not being aware of the complexity of certain operations, or a getter/setter very time-consuming (in that case I'd use public getXXX/setXXX functions instead, to emphasize that "something" is happening, not just an attribute lookup)

> If a person comes from, say, Object Pascal (Delphi)
> then properties are hard to live without. The

You should read the article "Python is not Java" if you haven't done it yet.
http://dirtsimple.org/2004/12/python-is-not-java.html

> other day I decided I wanted what OP calls an
> "indexed property" or "array property". Couldn't
> figure out how to make a _property_ behave that way.
> So I read a little bit about descriptors, and a
> few minutes later I had an indexedproperty thing
> that works just like property, except it gives
> an indexed property! This is just too cool.
>
> Why? For example, a Matrix should have a row[n]
> property allowing things like
>
> m.row[0] = m.row[1] + m.row[2]
>
> Ok, you could do _that_ by just making row
> an ordinary list of Row objects. But then
> you'd have to say
>
> m.row[0] = Row([1,2,3])
>
> where I want to be able to say
>
> m.row[0] = [1,2,3]
>
> and have the Row created automatically.

One could make *row* an object with a custom __getitem__/__setitem__ in this case. But I prefer to have as little magic as possible on my objects: if it says m.row[0] = [1,2,3] I expect m.row[0] to actually *be* that list (whenever possible), and not any other object initialized from the [1,2,3] arguments. (Maybe this is some overreaction against C++ "magic" constructors and such horrible things...)

> _Also_ with these indexed properties my Matrix
> can have m.row[j] and m.col[k] that look exactly
> the same to a client - we don't want to store a
> list of rows internally and also store the same
> data in a list of columns. Too cool.

The same can be achieved having m.row and m.col be custom objects like I said above.

> Hmm, none of that's a valid excuse for a post here.
> Um, right, here we go: Anyone see problems or
> possible improvements with the implementation
> of indexedproperty below?

Note that the property object (or your indexedproperty) is a *class* attribute. That is, shared among all instances.

> class indexedproperty(object):
>   def __init__(self, getitem=None, setitem=None):
>     self.getitem = getitem
>     self.setitem = setitem
>
>   def __get__(self, obj, owner):
>     self.obj = obj
>     return self

Here is the problem. You can't store "obj" in "self" because it is shared among all instances. Your examples don't show any problem because all property accesses are immediately followed by a getitem access using the same object. Try this:

x = AClass()
y = AClass()
x.cell[0,0] = 1
print x.cell[1,1]   # output: 0
y.cell[x.cell[0,0], x.cell[0,0]] = 2
print y.cell[1,1]   # should be 2, still 0
print x.cell[1,1]   # should still be 0, but changed, now 2

A workaround would be to return another object in __get__ instead of self, which remembers the "obj" instance, or a closure, or...
But I don't really see the point, it's a lot easier to use another object for .cell (it's more clear, doesn't break encapsulation, divides responsabilities...)

class Matrix2x2(object):
   def __init__(self):
     self.cells = [[0,0], [0,0]]

   def __setitem__(self, (row, col), value):
     self.cells[row][col] = value

   def __getitem__(self, (row, col)):
     return self.cells[row][col]

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2()


-- 
Gabriel Genellina



From cokofreedom at gmail.com  Wed May 21 08:47:12 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 05:47:12 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com> 
	<48340938$0$10773$426a74cc@news.free.fr>
Message-ID: <1a01cb57-3b7e-4ce5-bbdb-ed9c8e70396d@59g2000hsb.googlegroups.com>

''.join(seen.add(c) or c for c in s if c not in seen)

>From what I can understand...

.join will be a String of unique 'c' values.

'seen.add(c) or c' will always point to the second statement 'c'
because seen.add(c) returns None.

'if c not in seen' will ensure 'c' being added to both the .join and
seen is unique.

That is really clever! I like it :) (but does require a bit of
knowledge about .add return None and the affect that has on the ..
or .. statement)


From upton at virginia.edu  Wed May 21 12:56:55 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:56:55 -0400
Subject: can someone with guessing a number
In-Reply-To: <005101c8bb61$b78fb710$1300a8c0@Home>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
Message-ID: <5504f9ac0805210956o3e798659gb7485d1c3df54686@mail.gmail.com>

On Wed, May 21, 2008 at 12:42 PM, garywood <woodygar at sky.com> wrote:
> I would just like the program to exit after guessing the amount of numbers
> wrong
>
> # Guess My Number
> import random
> the_number = random.randrange(100) + 1
> tries = 1
> # guessing loop
> while (guess != the_number):
>     if (guess > the_number):
>         print "Lower..."
>     else:
>         print "Higher..."
>
>     guess = int(raw_input("Take a guess: "))
>     tries += 1
>     if tries > 10:
>         print 'you failed- give up'
>
> print "You guessed it!  The number was", the_number
> print "And it only took you", tries, "tries!\n"
>
> raw_input("\n\nPress the enter key to exit.")
>
> many Thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
>

How about you check tries > 10 in the condition for your while loop,
and then after the loop you use the value of tries to decide which
message to print out?


From gabe at dragffy.com  Thu May 15 06:52:10 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:52:10 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<692i3kF2vrfbfU1@mid.uni-berlin.de>
Message-ID: <loom.20080515T105133-934@post.gmane.org>

Diez B. Roggisch <deets <at> nospam.web.de> writes:

> So instead of creating a list of list by the *-operator that only multiplies
> the references (which is fine immutable objects like strings or numbers),
> you need to explicitly create new lists, e.g. with a list-comprehension:
> 
> tasks = [[] for _ in xrange(6)]
> 
> Try this and everything will work as expected.
> 

Thanks, Diez.

Thanks to all who replied to help me with this :)



From kyosohma at gmail.com  Thu May 29 10:36:03 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 29 May 2008 07:36:03 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1721.1212054906.12834.python-list@python.org>
	<2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
Message-ID: <caf9e88e-80f1-41ab-9a38-472255bbdf7c@34g2000hsh.googlegroups.com>

On May 29, 5:26?am, Kalibr <space.captain.f... at gmail.com> wrote:
> On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>
>
>
>
>
> > You don't say, but I assume you're on Windows since you mention
> > GetFileVersionInfo (which doesn't have anything to do with media
> > files, by the way) and WMA. There may be packages out there
> > to do all this already but if not you'll need to pull in a few disparate
> > modules and mix'n'match.
>
> > While ID3 readers (which determine the metadata for MP3) are reasonably
> > common few of them come ready-compiled for Windows. I've used Ned
> > Batchelder's id3reader [1] successfully for simple tasks so you might try
> > that. On the WMA side, you can automate Windows Media Player to get
> > metadata. (And it might work for .mp3; I've not tried).
>
> > <code>
> > import win32com.client
>
> > player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
> > wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
> > try:
> > ? artist = wmedia.getItemInfo ("Artist")
> > finally:
> > ? player.mediaCollection.remove (wmedia, False)
>
> > print "bells.mp3 has artist", artist
>
> > </code>
>
> > You're going to have to dig around for docs on this one. And it's not
> > pretty. Try starting from:
>
> >http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>
> > TJG
>
> > [1]http://nedbatchelder.com/code/modules/id3reader.html
>
> Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
> and I just assumed that there must be a way to programmatically get
> the stuff you get from choosing properties in the right click menu.
> But I guess there isn't (hard to believe, because I can't see MS hard-
> coding each and every file format's metadata into it's OS). I might
> have to learn more about the command prompt ( I hear there is a module
> for fiddling with it) and work from there.
>
> Cheers for the links though, I will be checking them out :)

You might also check out the ID3 library:

http://id3-py.sourceforge.net/

It doesn't look like it's been updated for a few years. I tested it on
XP and it seems to work though.

I also found this snippet, but it's pretty rudimentary:

http://snipplr.com/view/1624/python--get-id3-from-mp3-file/

Finally, check out the ID3 Handling section on this site:

http://wiki.python.org/moin/UsefulModules

-------
Mike

Blog: http://blog.pythonlibrary.org/


From larry.bates at websafe.com`  Wed May 21 21:57:38 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Wed, 21 May 2008 20:57:38 -0500
Subject: backport of 'set' to python 2.3?
In-Reply-To: <mailman.1459.1211420324.12834.python-list@python.org>
References: <mailman.1459.1211420324.12834.python-list@python.org>
Message-ID: <noednTbESqO7TqnVnZ2dnUVZ_vKdnZ2d@comcast.com>

Daniel Fetchinson wrote:
> Does anyone have a pure python implementation of the builtin 'set'
> object so that I could use that in python 2.3? If this would be the
> case that would be really great as I wouldn't have to change my code
> that runs happily on 2.5 and makes use of 'set'. Speed and performance
> doesn't matter, any implementation that does exactly the same as the
> builtin 'set' in 2.5 would be great.
> 
> Cheers,
> Daniel

 From "What's new in Python 2.4":

Python 2.3 introduced the sets module. C implementations of set data types have 
now been added to the Python core as two new built-in types, set(iterable) and 
frozenset(iterable). They provide high speed operations for membership testing, 
for eliminating duplicates from sequences, and for mathematical operations like 
unions, intersections, differences, and symmetric differences.

You should be able to use sets module in 2.3.

-Larry


From claird at lairds.us  Fri May  9 12:00:40 2008
From: claird at lairds.us (Cameron Laird)
Date: Fri, 9 May 2008 16:00:40 +0000
Subject: Books for a new generation of Pythoneers (was: Newbie to python ---
	why should i learn !)
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
	<12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>
Message-ID: <829ef5-laf.ln1@lairds.us>

In article <12b0b227-0a6c-4653-973b-8f13f2e5b3c1 at v26g2000prm.googlegroups.com>,
maxinbjohn  <maxinbjohn at gmail.com> wrote:
>Hi Raxit,
>
>One of the the tempting features of Python is that it is fun to code
>in Python. If you are really trying to learn python, you should read
>Adventures with Neko (http://gnuvision.com/books/pybook/) . It is an
>introductory book on Python programming for school children by Mr.
>Pramode CE.
>
>It is fun for children (when I tried it, me too liked it) to do
>programming with Neko, the cat. I am sure that it will be a fun filled
>learning experience for you.
			.
			.
			.
Also of interest in the same regard:  the just-released (and
still on sale at Amazon?) <URL: http://www.manning.com/sande/ >.


From jeffober at gmail.com  Fri May  2 15:46:06 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:46:06 -0700 (PDT)
Subject: Searching and replacing text ?
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
	<yKGdnfugFprY94bVnZ2dnUVZ_qelnZ2d@comcast.com>
Message-ID: <45ab1b06-bb29-4d49-87a2-be2407d8f2b0@d1g2000hsg.googlegroups.com>

If you know that, for instance, every occurrence of '[[' needs to be
replaced with ']]', then it is much faster to use regular string
methods.  If you have the text stored in the variable foo:

foo = foo.replace('[[', '[').replace(']]', ']').replace('->', '')

If you need to recognize the actual pattern, use REs:

regex = re.compile(r'\[\[(.+?) -> (.+?)\]\]')
regex.sub(r'[\1 \2]', foo)


From bj_666 at gmx.net  Fri May 23 09:04:15 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 13:04:15 GMT
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<69n3poF33hfhfU1@mid.uni-berlin.de>
	<DExZj.2777$772.804@bignews2.bellsouth.net>
Message-ID: <69ntmfF33dagrU1@mid.uni-berlin.de>

On Fri, 23 May 2008 07:14:08 -0400, inhahe wrote:

> <purelyacademic>If the GUI defines that it's a board layout like chess or 
> checkers and the player will move around the board, it's hard to say what's 
> left for the "logic" part to do.

The logic part has the rules how you may move the pieces.  The GUI
shouldn't have to know how a knight, bishop, or queen can move or
what castling is.

> I can't think of any generalization for the fact that it's a 2D strategy
> game.  You could have a 2-dimensional array, the size of which is
> determined by the GUI,

No it isn't!  The size is independent from the GUI.  Most 2D strategy
games have maps that are way large than the GUI displays at once.  You
almost always see just a portion of the model of the game world in the GUI.

> but even motion on it would have to be defined by the GUI, in which case
> the GUI would simply be using the "logic" part for storing the array and
> accessing it via index values.  And then there's no reason not to put
> the array inside the GUI.

There are plenty of reasons.  You tie the game to one GUI this way.  No
way to change the GUI toolkit or to split the game into server (game
logic) and client (different GUIs, web application).

Ciao,
	Marc 'BlackJack' Rintsch


From mcsejung at yahoo.com  Fri May  2 09:50:49 2008
From: mcsejung at yahoo.com (mcse jung)
Date: Fri, 2 May 2008 06:50:49 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that writes a
	program?
Message-ID: <732225.29736.qm@web30304.mail.mud.yahoo.com>

Here is asample program that writes a program and then executes it.  
Do you knowof a much simpler way of writing a program that writes a program?
 
"""
-----------------------------------------------------------------------------
Name:        _writePythonCode.py
Purpose:     This script writes Python code and thentransfers control to it.
 
Author:      MCSEJUNG
 
Created:     2008/05/01
RCS-ID:      $Id: _writePythonCode.py $
Copyright:   (c) 2008
Licence:     GPL
   This program is free software; you canredistribute it and/or modify
   it under the terms of the GNU General PublicLicense as published by
   the Free Software Foundation; either version2 of the License
   (at your option) any later version.
 
   This program is distributed in the hope thatit will be useful,
   but WITHOUT ANY WARRANTY; without even theimplied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULARPURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNUGeneral Public License
   along with this program; if not, write tothe Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
Maintenance:MCSEJUNG 2008/05/01 This script writes Python code and then transfers controlto it.
-----------------------------------------------------------------------------
"""
__version__= "$Revision:  80101 $"
# $Source$
 
# Rememberto document each paragraph with a purposeful short description
 
#if__name__ == "__main__":
 
#Print thestart time of this process
import time
start =time.localtime(time.time())
year,month, day, hour, minute, second, weekday, yearday, daylight = start
print"Process Started", "%02d:%02d:%02d" % (hour, minute,second)
 
header1 ="""
-----------------------------------------------------------------------------
Name:        _generatedPython.py
Purpose:     This script was built by_writePythonCode.py
 
Author:      MCSEJUNG
 
Created:     2008/05/01
RCS-ID:      $Id: _generatedPython.py $
Copyright:   (c) 2008
Licence:     GPL
   This program is free software; you canredistribute it and/or modify
   it under the terms of the GNU General PublicLicense as published by
   the Free Software Foundation; either version2 of the License
   (at your option) any later version.
 
   This program is distributed in the hope thatit will be useful,
   but WITHOUT ANY WARRANTY; without even theimplied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULARPURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNUGeneral Public License
   along with this program; if not, write tothe Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
Maintenance:MCSEJUNG 2008/05/01 This script was built by _writePythonCode.py
-----------------------------------------------------------------------------
"""
 
header2 ="""
# $Source$
 
# Rememberto document each paragraph with a purposeful short description
 
#if__name__ == "__main__":
 
#Print thestart time of this process
"""
 
filePathName= 'C:\\Python25\\Lib\\_myStuff'
fileInName= '_generatedPython.py'
filegTName= filePathName + '\\' +fileInName
gT =open(filegTName, 'w')
 
gT.write('"""'+ header1 + '"""' + '\n')
gT.write('__version__= "$Revision:  80101 $"'+ '\n')
gT.write('"""'+ header2 + '"""' + '\n')
gT.write('importtime'+'\n')
gT.write('start= time.localtime(time.time())'+'\n')
gT.write('year,month, day, hour, minute, second, weekday, yearday, daylight = start'+'\n')
gT.write('print"Generated Process Started", "%02d:%02d:%02d" % (hour,minute, second)'+'\n')
#-----------
gT.write('print"start"'+'\n')
gT.write('fori in [0,4,8,12,16,12,8,12,8,12,16,12,8,4,8,12,16,12,8,4,0]:'+'\n')
gT.write('    print "-"*i'+'\n')
gT.write('print"end"'+'\n')
#-----------
gT.write('#Calculatethe processes duration; format and print the start time, stop time, andduration'+'\n')
gT.write('stop= time.localtime(time.time())'+'\n')
gT.write('syear,smonth, sday, shour, sminute, ssecond, sweekday, syearday, sdaylight =stop'+'\n')
gT.write(''+'\n')
gT.write('thour   = shour'+'\n')
gT.write('tminute = sminute'+'\n')
gT.write('tsecond= ssecond'+'\n')
gT.write(''+'\n')
gT.write('iftsecond < second:'+'\n')
gT.write('    tminute = tminute - 1'+'\n')
gT.write('    dursecond = 60 + tsecond - second'+'\n')
gT.write('else:'+'\n')
gT.write('    dursecond = tsecond - second'+'\n')
gT.write(''+'\n')
gT.write('iftminute < minute:'+'\n')
gT.write('    thour = thour - 1'+'\n')
gT.write('   
durminute = 60 + tminute - minute'+'\n')
gT.write('else:'+'\n')
gT.write('   
durminute = tminute - minute'+'\n')
gT.write(''+'\n')
gT.write('ifthour < hour:'+'\n')
gT.write('    xday = 1'+'\n')
gT.write('    durhour = hour - thour'+'\n')
gT.write('else:'+'\n')
gT.write('    xday = 0'+'\n')
gT.write('    durhour = thour - hour'+'\n')
gT.write(''+'\n')
gT.write('ifxday == 0:'+'\n')
gT.write('    print "Generated Process Completed--", "start:", "%02d:%02d:%02d" % (hour, minute,second), "stop:", "%02d:%02d:%02d" % (shour, sminute,ssecond), "duration:", "%02d:%02d:%02d" % (durhour,durminute, dursecond);'+'\n')
gT.write('else:'+'\n')
gT.write('    print "Generated Process Completed--", "start:", "%02d:%02d:%02d" % (hour, minute,second), "stop:", "%02d:%02d:%02d" % (shour, sminute,ssecond), "duration:", "%02d:%02d:%02d" % (durhour,durminute, dursecond), "and one day";'+'\n')
 
gT.flush()
gT.close()
 
execfile("_generatedPython.py")
 
#Calculatethe processes duration; format and print the start time, stop time, andduration
stop =time.localtime(time.time())
syear,smonth, sday, shour, sminute, ssecond, sweekday, syearday, sdaylight = stop
 
thour   = shour
tminute =sminute
tsecond =ssecond
 
if tsecond< second:
    tminute = tminute - 1
    dursecond = 60 + tsecond - second
else:
    dursecond = tsecond - second
 
if tminute< minute:
    thour = thour - 1
    durminute = 60 + tminute - minute
else:
    durminute =tminute - minute
 
if thour< hour:
    xday = 1
    durhour = hour - thour
else:
    xday = 0
    durhour = thour - hour
 
if xday ==0:
    print "Process Completed --",'start:', "%02d:%02d:%02d" % (hour, minute, second), 'stop:',"%02d:%02d:%02d" % (shour, sminute, ssecond), 'duration:',"%02d:%02d:%02d" % (durhour, durminute, dursecond);
else:
    print "Process Completed --",'start:', "%02d:%02d:%02d" % (hour, minute, second), 'stop:',"%02d:%02d:%02d" % (shour, sminute, ssecond), 'duration:',"%02d:%02d:%02d" % (durhour, durminute, dursecond), 'and one day';




      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ


From bearophileHUGS at lycos.com  Sat May 17 08:01:01 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 17 May 2008 05:01:01 -0700 (PDT)
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
Message-ID: <0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>

dave, few general comments to your code:
- Instead of using a comment that explains the meaning of a function,
add such things into docstrings.
- Your names can be improved, instead of f you can use file_name or
something like that, instead of convert_file you can use a name that
denotes that the conversion is already done, etc.
- You can use xrange instead of range and you can indent less, like 4
spaces.
- This line may be slow, you may want to find simpler ways to do the
same thing:
rkey = random.choice(analyze.keys())
- I suggest you to add doctests to all your functions.

Bye,
bearophile


From deets at nospam.web.de  Wed May 21 10:09:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 16:09:47 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
Message-ID: <69ioqaF32l8buU1@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

>>
>> And wastes time. regular expressions can become expensive to match -
>> doing it twice might be hurtful.
>>
>> Diez
> 
> match = (my_re1.match(line) or my_re2.match(line)) or
> my_re3.match(line)

How do you know *which* of the three has matched then?

Diez


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:18:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:18:15 -0300
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
Message-ID: <op.ua278ppex6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 06:34:03 -0300, <wxPythoner at gmail.com> escribi?:

> Is that true that this comparison operators are gone in Python 3.0:
>
> <    (is less than)
>>    (is greater than)
> <= (is less than or equals)
>> = (is greater than or equals)
>
> Is it true?

May I ask *where* did you read that crazy idea?

-- 
Gabriel Genellina



From bbxx789_05ss at yahoo.com  Sat May 17 21:58:25 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 18:58:25 -0700 (PDT)
Subject: smtplib "authentication required" error
References: 1143858027.337885.24650@j33g2000cwa.googlegroups.com 
	<mailman.1278.1211048201.12834.python-list@python.org>
Message-ID: <86a9a140-733e-46f1-9ca4-fbe32d5c9647@l42g2000hsc.googlegroups.com>

On May 17, 12:18?pm, cher <cheryl.gi... at comcast.net> wrote:
> Hey,
>
> Don't know if you can help, but I'm trying to import archived messages
> from Thunderbird into my gmail account and keep getting these types of
> errors. ?I am using the GML program to help incorporate, but the SMTP
> server is not being recognized by gmail. ?Am I doing something wrong? ?
> Anything else I can try?
> SMTP I've tried:
> ? ? smtp.gmail.com
> ? ? gsmtp56.google.com
>
> Error Val : (530, '5.7.0 Must issue a STARTTLS command first.
> m29sm9416768poh.4',
> *** 76 ERROR SENDING MESSAGE FROM: r... at bassisloadeddj.com
> *** UNABLE TO CONNECT TO SERVER OR SEND MESSAGE. ERROR FOLLOWS.
> Error Type: smtplib.SMTPSenderRefused
> Error Val : (530, '5.7.0 Must issue a STARTTLS command first.
> n22sm9448670pof.3', 'r... at bassisloadeddj.com')
>
> Thanks,
> Cher

Can you get the following program to work?


#Uses gmail to send an email to someone

import smtplib

sender = "Tom"
to = "Sally"
subject = "Test smtplib"

headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (sender, to,
subject)
msg = headers + "Hello.  How are you?"

mailserver = smtplib.SMTP("smtp.gmail.com", 587)
mailserver.ehlo()
mailserver.starttls()
mailserver.ehlo()
mailserver.login("your_gmail_email_address", "your_gmail_password")
mailserver.sendmail("your_gmail_email_addres",
"a_destination_email_address", msg)
mailserver.close()



From exarkun at divmod.com  Wed May 14 09:34:27 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 09:34:27 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <1210762382.6465.3.camel@jcd-desktop>
Message-ID: <20080514133427.6859.1579611234.divmod.quotient.63398@ohm>

On Wed, 14 May 2008 06:53:02 -0400, "J. Clifford Dyer" <jcd at sdf.lonestar.org> wrote:
>On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
>> > You sound like a commercial.
>>
>> Get Flaming Thunder for only $19.95!  It slices, it dices!
>>
>> > And while programs and libraries written in assembly may be twice as fast
>> > as programs and libraries written in C, ...
>>
>> It's a myth that they're only twice as fast.  An experienced assembly
>> language programmer can usually get out at least a factor of 5 by
>> using tricks such as cache-coherence, carry flag tricks, stack
>> manipulations, etc.
>>
>> > ... they're real hell to maintain.
>>
>> That's also a myth.  For example, if C is easy to maintain, why is
>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
>> the world?  There should be lots of single-asset 8-by-8 shotgun cross
>> compilers written in C, if C is easier to maintain.
>
>Not only is it the world's only "single-asset 8-by-8 shotgun cross
>compiler," but according to google, it's also the world's only "shotgun
>cross compiler" period.  But I guess if you make up your own terminology
>you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
>single-asset 8x8 shotgun cross compiler, and what makes that of any
>value to me?

The web page explains.  It's a compiler that runs on 8 platforms and can
generate executables for any of them on any of them.  It's not _totally_
clear about what "single-asset" means, but it gives the impression (and
the term somewhat suggests) that this means there's a single executable
that does all of this (compare to gcc's design, where support for cross
compiling to another arch is provided by a separate executable).

"Shotgun" probably just sounds cool.

Jean-Paul


From kyosohma at gmail.com  Thu May 15 11:13:56 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 15 May 2008 08:13:56 -0700 (PDT)
Subject: Problem creating a shorcut
Message-ID: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>

Hi,

I've had this niggling issue from time to time. I want to create a
shortcut on the user's desktop to a website that specifically loads
Firefox even if Firefox is not the default browser.

I usually use COM as it allows very specific settings of the shortcut,
such as the Working Directory and the Target Path. However, the
following will not work for some reason:

<code>

import win32com.client
import winshell

shell = win32com.client.Dispatch('WScript.Shell')
userDesktop = winshell.desktop()

shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
https:\www.myCompanyWebsite.com\auth\preauth.php'
shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
Firefox'
shortcut.save()

</code>

This creates the following target path (which doesn't work):

"C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
\www.myCompanyWebsite.com\auth\preauth.php"

If I leave the website off, it works. If I leave the path to Firefox
out, it works too. Is there another method I can use other than
creating the shortcut by hand and using the shutil module?

Thank you for any ideas.

Mike


From ptmcg at austin.rr.com  Tue May 20 11:58:41 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 08:58:41 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
Message-ID: <b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>

On May 20, 10:50?am, s0s... at gmail.com wrote:
>
> You don't need all those conditionals. A set differs from a list
> precisely in the fact that each element is unique. And since the
> function is expecting "s" to be an iterable object, it can be
> constructed even without a for loop:
>
> def compress(s):
> ? ? return list(set(s))
>
> That does the trick.
>
>

Only if order does not need to be maintained.  list(set(s)) will not
necessarily keep the unique characters in the order they are seen.
We'll have to check with the OP to see if this is important (I just
assumed that it was because of the use of list comps).

-- Paul


From timr at probo.com  Fri May  9 23:03:13 2008
From: timr at probo.com (Tim Roberts)
Date: Sat, 10 May 2008 03:03:13 GMT
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>	<4822E485.4040107@aim.com>
	<20080508083323.06a74930.darcy@druid.net>
	<mailman.761.1210251369.12834.python-list@python.org>
Message-ID: <hv3a2493k9b95b3529jgm0cg275g64t1j2@4ax.com>

Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>D'Arcy J.M. Cain wrote:
>> Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>>   
>>> This is sort of related, but I'm wondering what is different between 
>>> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
>>> thing, since an absolute path is not specified, find 'python' from the 
>>> PATH environment,  I don't really know.
>>
>> Well, I know what happened when I tried it.  What happened when you
>> tried it?
>   
>I haven't tried it but I've seen some files like written that in the 
>past with just a name and no path for some other interpreter (perl or sh 
>probably) and didn't know what the different was or if it was even 
>valid. 

It's not valid.  The shebang line (#!) must specify a full path.  When you
saw the lone word ("perl"), it was probably a /usr/bin/env line, just we
have been discussing.

>I at a windows system now so I can't try it yet.

*IF* you are interested in playing with Linux, most of the distributions
have bootable CDs that will bring up a full Linux environment without ever
touching your hard disk.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From cmgui2 at gmail.com  Sat May 24 01:56:57 2008
From: cmgui2 at gmail.com (cm_gui)
Date: Fri, 23 May 2008 22:56:57 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
Message-ID: <5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>

i am not comparing Python with C or C++ which are of course
compiled languages.

if there is any consolation to Python lovers here, Python is still
faster than Microsoft ASP/ASPX.

i'm not trying to 'troll' here.   it's not just me.
many have complained that python is slow.   python websites are slow.

if python is such a good programming/scripting language,
why can't they build a faster interpreter/compiler engine?
and beat php and zend.
to the python team, rebuild your interpreter!


torontolife.com is slow.

okay, maybe Python is only slightly slower than PHP,
but it APPEARS to be much slower.
there is a distinct waiting time whenever you access a python web page
before the page starts loading.  but once it loads, it is fast.
php page starts loading immediately once you access it,
but you can see the page slowly loading.
because you see the page starts loading immediately, you feel it is
fast.



On May 22, 10:04 am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 11:14 am, cm_gui <cmg... at gmail.com> wrote:
>
> >Pythonisslow.    Almost all of the web applications written in
> >Pythonareslow.   Zope/Plone isslow, sloow, so very slooow.  Even
> > Google Apps is not faster.   Neither is Youtube.
> > Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> > thanPython.
> > Okay, they probably use caching or some code compilation -- but Google
> > Apps and those Zope sites probably also use caching.
>
> > I've yet to see a web application written inPythonwhich is really
> > fast.
>
> What abouthttp://www.torontolife.com/? It uses Django...
>
> Mike



From castironpi at gmail.com  Wed May 14 14:02:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:02:31 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com>
Message-ID: <b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com>

On May 14, 12:51?pm, castiro... at gmail.com wrote:
> On May 14, 5:25?am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > you can safely ignore its posts.
>
> > > > > How does it generate text?
>
> > > > My guess is by inhaling a lot of intoxicants.
>
> > > However you know what would be helpful? ?If I could go to the right
> > > place to start the ring.
>
> > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> I'd stay on mutability for the world domination factor. ?Fluent
> currency is buoyant currency; turn on a local clock, and someone gets
> some cubic verticals.
>
> Now if sense-reference is trading on the BDFL, I'm still holding Tron
> can pretty well win work.- Hide quoted text -
>
> - Show quoted text -

I have a self-referential on Pygame: it's a Hand Tool object.
Currently, it decays over time.  You said 'flip' in the newsgroup, and
'check', 'cross', and 'mate'.  Now who jumps who?


From arnodel at googlemail.com  Wed May 28 05:16:56 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 10:16:56 +0100
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <m2od6q4wl3.fsf@googlemail.com>

dave_140390 at hotmail.com writes:

> Hi,
>
> I have problems getting my Python code to work with UTF-8 encoding
> when reading from stdin / writing to stdout.
>
> Say I have a file, utf8_input, that contains a single character, ?,
> coded as UTF-8:
>
> 	$ hexdump -C utf8_input
> 	00000000  c3 a9
> 	00000002
>
> If I read this file by opening it in this Python script:
>
> 	$ cat utf8_from_file.py
> 	import codecs
> 	file = codecs.open('utf8_input', encoding='utf-8')
> 	data = file.read()
> 	print "length of data =", len(data)
>
> everything goes well:
>
> 	$ python utf8_from_file.py
> 	length of data = 1
>
> The contents of utf8_input is one character coded as two bytes, so
> UTF-8 decoding is working here.
>
> Now, I would like to do the same with standard input. Of course, this:
>
> 	$ cat utf8_from_stdin.py
> 	import sys
> 	data = sys.stdin.read()
> 	print "length of data =", len(data)

Shouldn't you do data = data.decode('utf8') ?

> does not work:
>
> 	$ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
> 	length of data = 2

-- 
Arnaud



From prisoner_at_war at yahoo.com  Sun May 25 20:26:04 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Sun, 25 May 2008 17:26:04 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
Message-ID: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>


Hi, your friendly neighborhood n00b here, just wondering why on earth
the Py3K folks want to mess with a simple thing like the "print"
"command" (is that what it's called, a command?), turning it into
"print()"...I mean, what's the point, exactly??  To look like a more
"traditional" computer-language format?

And what's with not supporting the so-called softspace "feature" of
the current "print" command, where a space after a comma, like

>>>print "A\n", "B"

outputs

>>>A\nB\n

but with Py3K it will be

>>>print("A\n", "B")

returning

>>>A\n B\n

????

I was all excited to start learning the language, when suddenly I find
out that a new version is slated for release late summer/early fall
this year -- a new version which is not only not backwards-compatible
with previous versions in many important ways, but even when it comes
to a little thing like the "print" command!!

What's up with that??


From vivainio at gmail.com  Fri May  9 03:12:04 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Fri, 9 May 2008 00:12:04 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
Message-ID: <7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>

On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:

> All these examples assume your regular expression will not span multiple
> lines, but this can easily be the case. How would you process the file
> with regular expressions that span multiple lines?

re.findall/ finditer, as I said earlier.




From upton at virginia.edu  Wed May 21 17:19:47 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 17:19:47 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <5504f9ac0805211419j7e7d1926y129316e858048bf@mail.gmail.com>

On Wed, May 21, 2008 at 4:56 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
>> My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

However, this is not an issue of language correctness, it's an issue
of specification and/or hardware.  If you look at the given link, it
has to do with the x87 being peculiar and performing 80-bit
floating-point arithmetic even though that's larger than the double
spec.  I assume this means FT largely performs floating-point
arithmetic in software rather than using the FP hardware (unless of
course you do something crazy like compiling to SW on some machines
and HW on others depending on whether you trust their functional
units).

The fact is, sometimes it's better to get it fast and be good enough,
where you can use whatever methods you want to deal with rounding
error accumulation.  When accuracy is more important than speed of
number crunching (and don't argue to me that your software
implementation is faster than, or probably even as fast as, gates in
silicon) you use packages like Decimal.

Really, you're just trying to advertise your language again.


From aspersieman at gmail.com  Fri May 16 04:17:51 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Fri, 16 May 2008 10:17:51 +0200
Subject: send yield
In-Reply-To: <054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>	<mailman.1165.1210861589.12834.python-list@python.org>	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>
	<a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>
	<054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>
Message-ID: <482D432F.6050007@gmail.com>

castironpi wrote:
> On May 15, 7:16 pm, castironpi <castiro... at gmail.com> wrote:
>   
>> On May 15, 6:43 pm, castironpi <castiro... at gmail.com> wrote:
>>
>>
>>
>>
>>
>>     
>>> On May 15, 6:16 pm, castironpi <castiro... at gmail.com> wrote:
>>>       
>>>> On May 15, 4:28 pm, "bruno.desthuilli... at gmail.com"
>>>>         
>>>> <bruno.desthuilli... at gmail.com> wrote:
>>>>         
>>>>> On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>>>>>           
>>>>>> On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>>>>>>             
>>>>>>> On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
>>>>>>>               
>>>>>>>> Why can't I write this?
>>>>>>>> --
>>>>>>>>                 
>>>>>>> Because your antecedent is undefined?
>>>>>>>               
>>>>>> Of the two ways to play, just to say #define this per se would be a
>>>>>> bad move, but that's one that comes from the wrong group.  #define is
>>>>>> a big scary macro, that python hasn't been using; it's the one-line
>>>>>> typo.  Instance:
>>>>>>             
>>>>>> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>>>>>>             
>>>>>> Use it to render planes in solids.
>>>>>>             
>>>>>> Back about 'this', I honestly hadn't remembered 'til this time, when I
>>>>>> got a chance to reread the subject.  Plus I keep ditching my radio.
>>>>>>             
>>>>> Jesus H. Christ. This really sounds like my mother in law. Scary,
>>>>> definitively.- Hide quoted text -
>>>>>           
>>>>> - Show quoted text -
>>>>>           
>>>> Definitely.  But, due, I forgot to complete an example.
>>>>         
>>>>>> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>>>>>>             
>>>> in C.  Python:
>>>>         
>>>> life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
>>>> exec( life1 )
>>>>         
>>>> Where does it go?- Hide quoted text -
>>>>         
>>>> - Show quoted text -
>>>>         
>>> I'm supposed to talk about an entropy pool game.  You can tunnel.- Hide quoted text -
>>>       
>>> - Show quoted text -
>>>       
>> If I had a send-parachute, would all you need be yield?  Let's drop
>> graphics.- Hide quoted text -
>>
>> - Show quoted text -
>>     
>
> My character is studying chord progressions.  I have right angles.
> I'm on a laptop, and talking in the car is fine.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   
My olive grove gave birth to many world war I biplanes.... I think I 
need more salt.

This thread gave me hope...

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From ervin.ramonllari at hotmail.com  Mon May 19 12:00:30 2008
From: ervin.ramonllari at hotmail.com (ervin.ramonllari at hotmail.com)
Date: Mon, 19 May 2008 18:00:30 +0200
Subject: No subject
Message-ID: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>

Hi there,

I'm trying to install PyGreSQL for python 2.4.
the installation seems to be done correctly, but when I try to import the pgdb module I got the message:
>>> import pgdb
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in -toplevel-
    import pgdb
  File "C:\Python24\Lib\site-packages\pgdb.py", line 69, in -toplevel-
    from _pg import *
ImportError: DLL load failed: The specified module could not be found.

I googled around and I found that the problem could be the libpq.dll file. Then I copied the libpq.dll to the windows directory as well as in the Python dll's directory but the problem is still there.

Please, could someone help me to solve this problem?
Thank you in advance!
Ervin.
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From castironpi at gmail.com  Mon May 12 20:28:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 17:28:06 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.996.1210619207.12834.python-list@python.org>
Message-ID: <b0713742-15d5-4b25-a901-9f92b6f3e61a@34g2000hsh.googlegroups.com>

On May 12, 2:06?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.po... at gmail.com wrote:
> > [snip]
>
> >My script send me via 3883 port (VRPN) data, but only once. I need
> >listening this port countinously.
> >So I need ?make some loop to print data from 3883 port permanent.
> >Data that I recevied looks liek this:
>
> >receive data from server: 'vrpn: ver. 07.13 ?0\x00\xe8\x0b\x00\x00'
>
> I'm not sure if you need to write a server or a client. ?In your
> original code, you had a client which repeatedly established out-
> bound connections. ?Here, you say you need to listen on a port.
>
>
>
> >Do you think its necessary to use Twisted? Do you have any ideas how
> >to do it with socket modul?
>
> The basic version is pretty easy either way. ?However, with Twisted,
> you get cross-platform error handling without any extra effort, and
> you don't have to think about the boring low-level details of BSD
> sockets.
>
> Here's a Twisted server that listens on port 3883 forever and prints
> the data it receives from each connection after the remote side drops
> the connection:
>
> ? ? from twisted.internet import reactor
> ? ? from twisted.internet.protocol import ServerFactory, Protocol
>
> ? ? class PrintingProtocol(Protocol):
> ? ? ? ? def connectionMade(self):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? When the connection is first established, create a list
> ? ? ? ? ? ? into which to buffer all received data.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? self.received = []
>
> ? ? ? ? def dataReceived(self, data):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? Whenever any data is received on this connection, add it
> ? ? ? ? ? ? to the buffer.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? self.received.append(data)
>
> ? ? ? ? def connectionLost(self, reason):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? When the connection is lost, print out the contents of
> ? ? ? ? ? ? the receive buffer.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? print repr("".join(self.received))
>
> ? ? # Create a factory which will use our protocol to handle incoming
> ? ? # connections.
> ? ? factory = ServerFactory()
> ? ? factory.protocol = PrintingProtocol
>
> ? ? # Listen with it on port 3883
> ? ? reactor.listenTCP(3883, factory)
>
> ? ? # Start the reactor. ?Nothing in this program will ever stop the
> ? ? # reactor, so it will run and accept connections forever.
> ? ? reactor.run()
>
> If you were to use the socket module, then it would look something like this:
>
> ? ? from socket import socket
> ? ? from errno import EINTR
>
> ? ? port = socket()
> ? ? port.bind(('', 3883))
> ? ? port.listen(5)
> ? ? while True:
> ? ? ? ? try:
> ? ? ? ? ? ? server, clientAddr = port.accept()
> ? ? ? ? except socket.error, e:
> ? ? ? ? ? ? print "Error accepting client connection", e
> ? ? ? ? else:
> ? ? ? ? ? ? received = []
> ? ? ? ? ? ? while True:
> ? ? ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? ? ? bytes = server.recv(1024 * 16)
> ? ? ? ? ? ? ? ? except socket.error, e:
> ? ? ? ? ? ? ? ? ? ? if e.errno == EINTR:
> ? ? ? ? ? ? ? ? ? ? ? ? continue
> ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? ? ? if not bytes:
> ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? ? ? received.append(bytes)
> ? ? ? ? ? ? print repr("".join(received))
>
> Hope this helps,
>
> Jean-Paul

FWIW, my countrymen!  The above code devotes a resource.  It may be
trivial and/or microscopic, but a computer has them!


From nick at craig-wood.com  Mon May  5 13:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 05 May 2008 12:30:03 -0500
Subject: Script using generators produces different results when invoked
	as a CGI
References: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>
	<mailman.572.1209969433.12834.python-list@python.org>
Message-ID: <slrng1ufbj.nr7.nick@irishsea.home.craig-wood.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>  En Mon, 05 May 2008 00:31:45 -0300, Barclay, Ken <Ken.Barclay at schwab.com> escribi?:
> 
> > I attended David Beazley's awe-inspiring tutorial on the use of
> > generators in systems programming:
> >http://www.dabeaz.com/generators/
> > <BLOCKED::http://www.dabeaz.com/generators/>
> >I used his approach to write a web tool that can display search results
> > from different log files. But the resulting script produced fewer
> > results when invoked as CGI than it did when run from the command line,
> > and I can't figure out why.
> 
> > Problem: For small sets of files this works great. But when I had 19Meg
> > worth of log files in a test directory, the script would return the
> > correct number of matching lines (288) only when it was invoked directly
> > from the command line. When invoked from a CGI script, it returns 220
> > lines instead
> 
>  No entry in the error log, on the web server? (Apache?)
>  Perhaps you're hitting some internal limit of the cgi process, either memory or cpu time per request or temp file size...
>  Are you sure the script runs to completion? Output a message at the
>  end, to be sure.

Check the ownership of all the files too.  Remember that the web
server (and hence your cgi) will likely run as nobody or www-data.
You are unlikely to be logging in as one of those users.


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mail at timgolden.me.uk  Fri May 16 07:06:25 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 12:06:25 +0100
Subject: Problem creating a shorcut
In-Reply-To: <c550g5-l5f.ln1@darkstargames.dnsalias.net>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <482D6AB1.20605@timgolden.me.uk>

Wolfgang Draxinger wrote:
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.

With respect, the OP is creating a Windows desktop shortcut.
Unless Microsoft suddenly decide to change their use of the 
backslash, I suggest that this is a needless generalisation.

> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. 

This is broadly true. However, it's fairly clear from the
phrase "the user's desktop" that the OP is working in some
kind of corporate environment where he can be fairly sure
where Firefox is installed by policy. In addition, it's not so
easy to find its path if it's not in the default place since apps 
very rarely add their location to the system PATH these days 
(and Firefox certainly doesn't). You could scan the registry for 
its App Paths entry in the registry but I don't know if any other 
way if it's not  the default browser (which it's clear from the 
original post it  may not be).

Sorry to sound a bit negative, but I felt that a couple of your points, 
while valid, were not altogether helpful to the situation the OP was in.

TJG


From irmen.NOSPAM at xs4all.nl  Mon May 19 14:29:53 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 20:29:53 +0200
Subject: Newbie: Keep TCP socket open
In-Reply-To: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
Message-ID: <4831c722$0$14351$e4fe514c@news.xs4all.nl>


Alan Wright wrote:

> while (num1<=10) :
> 
>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>  s.settimeout(10.0)
>  s.connect(("10.1.1.69", 50008)) # SMTP
>  print s.recv(1024) + '\n',
>  num1=num1+1
>  #s.close()
> 
> 
> sys.exit(1) 

I think the following is happening:
Reusing the 's' object for every new socket will make Python to garbage
collect the previous ones. Garbage collecting a socket will likely close() it.
Also after creating all sockets your program exits. I guess either Python or the 
operating system itself will go close all the sockets.


Try putting every new socket you make into a big list instead, so that Python can't 
garbage collect it. And put your program to sleep at the end.

import time
allsockets=[]

while (...):
	s=socket.socket(...
	allsockets.append(s)
	s.settimeout(...
	...

time.sleep(99999)



--irmen


From thorsten at thorstenkampe.de  Sat May 17 08:39:09 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 17 May 2008 14:39:09 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
Message-ID: <MPG.2298f05cd0e8474198975d@news.individual.de>

* ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> >
> > > Hi, what's the default localedir for gettext module on windows? In
> > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > order to make the translation work?
> >
> > %PYTHONHOME%\share\locale
> 
> I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> \LC_MESSAGES, but still no luck. The following is the code snippet I
> use:
> 
> import gettext
> gettext.install('testprogram', unicode = True)

The syntax is correct. Is the test program localised under Linux or 
Cygwin? If not then the error is somewhere in your application.

How did you try to set the language on Windows? It works for me on Vista 
with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to 
be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember 
correctly).

Thorsten


From castironpi at gmail.com  Tue May 20 09:53:21 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:53:21 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de> 
	<3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com> 
	<aaa0ef8c-e20e-420a-88e0-572c9697b47f@f63g2000hsf.googlegroups.com>
Message-ID: <01edb1b3-033b-4ebb-b042-aa9f8f7b4b47@m45g2000hsb.googlegroups.com>

On May 20, 8:24?am, bearophileH... at lycos.com wrote:
> bearophile:
>
> > So you need to store only this 11 byte long string to be able to
> > decompress it.
>
> Note that maybe there is a header, that may contain changing things,
> like the length of the compressed text, etc.
>
> Bye,
> bearophile

I've read that military texts contain different letter frequencies
than standard English.  If you use a non-QWERTY keyset, it may change
your frequency distribution also.

I worry that this is an impolite question; as such, I lean to peers
for backup:

Will you be additionally adding further entries to the zipped list?

Will you be rewriting the entire file upon update, or just appending
bytes?

If your sequence is 'ab, ab, ab, cd, ab', you might be at:

00010.

Add 'cd' again and you're at:

000101.

You didn't have to re-output the contents.

But, if you add 'bc', you have:

0001012, which isn't in binary.  So you're left at:

000 000 000 001 000 001 010

But five more and the byte overflows.

I'd say pickle the corpus, with new additions, and re-zip the entire
contents each time.  Would you like to break across
(coughdisksectorscough) multiple files, say, a different corpus-
compression file pair for every thousand entries?


From bborcic at gmail.com  Fri May  2 06:02:50 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 02 May 2008 12:02:50 +0200
Subject: get number that is raised to the power of
In-Reply-To: <68057fF2r409aU3@mid.uni-berlin.de>
References: <mailman.446.1209719973.12834.python-list@python.org>
	<68057fF2r409aU3@mid.uni-berlin.de>
Message-ID: <481ae6fd$1_7@news.bluewin.ch>

Marc 'BlackJack' Rintsch wrote:
> On Fri, 02 May 2008 19:19:07 +1000, Astan Chee wrote:
> 
>> Hi,
>> Im not sure if this is more of a math question or a python question. I 
>> have a variable in python:
>>  >>> v = 10.0**n
>> is there a way to find the value of n if i know only v aside from 
>> str(v).split('+')[1] ?

Astan, you could try something like (n for n in range(1,100) if 
10.0**n==v).next() or like len(str(int(v)))-1

>> that seems like too much of a hack and I was 
>> wondering if there was a faster way of doing it?

Faster ?! How fast do you need it to be ?

> 
> That hack isn't even working properly because ``str(10.0**1)`` has no '+'
> in its string representation.

OTOH "%.0e" % (10.0**1) does
...but "%.0e" % (10.0**-1) of course doesn't

> 
> Solution:
> 
> n = math.log(v, 10)
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

Beware of floating point approximations, though. Eg

 >>> assert log(10**3,10)==3

Traceback (most recent call last):
   File "<pyshell#12>", line 1, in <module>
     assert log(10**3,10)==3
AssertionError

Cheers, BB


From gagsl-py2 at yahoo.com.ar  Mon May 26 12:08:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 13:08:13 -0300
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
Message-ID: <op.ubrq3zp7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <paul at boddie.org.uk> escribi?:

>> I am also bothered a bit by the seeming inconsistency of the rules for
>> the single underscore. When used at file scope, they make the variable
>> or function invisible outside the module, but when used at class
>> scope, the "underscored" variables or functions are still fully
>> visible. For those who claim that the client should be left to decide
>> what to use, why is the client prohibited from using underscored
>> variables at file scope?
>
> I don't remember why this is. I'll leave you to track down the
> rationale for this particular behaviour. ;-)

There is no rationale because this is not how it works...
You can:
- import a module and access *all* of their names, even names prefixed with an underscore
- import any name from a module, even if it starts with an underscore
- import * from a module, and it will import all names listed in __all__, even if they start with an underscore

Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.

-- 
Gabriel Genellina



From castironpi at gmail.com  Mon May  5 23:28:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 20:28:29 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com>
Message-ID: <2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com>

On May 5, 1:55?pm, "metaw... at gmail.com" <metaw... at gmail.com> wrote:
> On May 4, 1:11 pm, castiro... at gmail.com wrote:
>
> > There is no such thing as a 'frame' per se in C; byte code is
> > integral. ?As there is no such thing as suspended state without
> > frames, and no such thing as generators without suspended state.
>
> Well, for implementing generators there are alternatives to using
> frames + byte code. In CLPython generators are implemented with
> closures. (Which does not help much when it comes to reimplementing
> generators in C, alas.)
>
> - Willem

There's a process decorator to functions in a module.

[supposes]

@process
def datafile( processdict ):
   processdict.modify( )
   op= yield
   op.call( ) in processdict
   # op.call( ) in namespace

More simply:

@process
def datafile( processdict ):
   processdict.modify( )
   interaction_object= yield
   invoke( interaction_object, processdict )
   #or interaction_object.invoke( **processdict )
   processdict.commit( )

Making each execution of process a self-modifying disk file.
Interaction_object could be binary or text.  If text, we'd have a
cross-language executable, but I'm suspicious it wouldn't be vacuous
as a Python of Python composition: would other languages pass other
than Python programs?

I think relational databases are the only in there.  In other words, I
think Python would make a wholly better stored procedure and query
language than those of databases.  Certainly I'm suspicious that's
naivete speaking up; I question, would it?  Is there more risk of or
opportunity for malicious execution?  Simply put, can we get
primitives in to databases?  What's an example of a [optionally real]
operation on the primitives that doesn't map pretty well into SQL?
How do you want to write base-case scenarios if they're going to be
literals?


From grante at visi.com  Fri May 23 10:11:10 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 23 May 2008 09:11:10 -0500
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
	<g1570j$n8g$1@aioe.org>
Message-ID: <8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>

On 2008-05-23, RPM1 <rpm9deleteme at earthlink.net> wrote:
> Larry Bates wrote:
>> If your Python program is slow, you have almost assuredly
>> approached it with a wrong method or algorithm.
>
> I agree for most applications.  There are however times where
> Python just isn't fast enough, and that's usually when people
> write extension modules.

Writing an extension modules is probably pretty far down the
list.  What usually happens is people

 a) Figure out they're using the wrong algorithm

 b) Find the library module that already does the "bottleneck"
    operations. 

-- 
Grant


From xahlee at gmail.com  Wed May 14 19:49:55 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Wed, 14 May 2008 16:49:55 -0700 (PDT)
Subject: generate all possible math expr of one term
Message-ID: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>

Here's a example of Expressiveness of a Language.

The following is Mathematica code that generates all possible
equations of one term involving trig function. (tweak the funList and
nesting level to define what ?all possible? means. if nesting level is
2, it takes about 20 minutes and returns a list of 2876 terms on a
2004 personal computer.

<< DiscreteMath`Combinatorica`
funList = {Sin, Tan, Power[#, -1] &};
Nest[Module[{li = #},
 (Union[#, SameTest -> (Module[{arg1 = #1, arg2 = #2},
   If[(*both expression contains both x and y*)
     And @@ (((((StringMatchQ[#, "*x*"] &&
     StringMatchQ[#, "*y*"]) &)@
     ToString@#) &) /@ {arg1, arg2})
     , SameQ[arg1, arg2 /. {x -> y, y -> x}],
     SameQ[arg1, arg2]]
   ] &)] &)@
   Union at Flatten@(Table[(Times @@ # &) /@ KSubsets[#, i], {i, 1,
   2}] &)@Flatten@{li, Outer[#1@#2 &, funList, li]}
 ] &, {x, y}, 1];
Select[%, (StringMatchQ[ToString@#, "*x*"] &&
 StringMatchQ[ToString@#, "*y*"]) &]

The problem is this: generate a list of all possible math expressions
using the following combination and rules:

? the math expression involves both x and y. (must have both present)
? you can use any of the 6 trig functions (you must, since the goal is
to create all possibilities)
? The binary operations you can use are multiply, divide. (no addition
or substraction, since that can make the result 2 terms)
? a sub-expression (such as x or y) can be replaced by a more
complicated one. (i.e. you can nest)

For example, these are first few items from the above code:

{1/(x^2*y^2), 1/(x*y^2), x/y^2, 1/(x*y), x/y, x^2/y, x*y, x^2*y,
x^2*y^2, Cos[x]/y^2, Cos[x]/y, Cos[x]/(x*y), (x*Cos[x])/y, y*Cos[x],
(y*Cos[x])/x, x*y*Cos[x], y^2*Cos[x], Cos[x]*Cos[y], Cot[x]/y^2,
Cot[x]/(x*y^2)}

For a gallery of selection plots of these equations, see
 http://xahlee.org/MathGraphicsGallery_dir/dense/dense1.html

The above i wrote in 2002. If there are requests, i'll translate the
above code into emacs lisp. The result lisp expression should match
Mathematica's, token for token. (the code make a lot use of nested
lambda and or apply and or map) If you are interested, you could
translate the above into lisp too, it's not difficult (though the
number of lines will increase maybe 10 fold. And if Common Lisp
doesn't have combinatorics library providing KSubsets, and also since
CL doesn't have Outer, so the above in CL might be few hundred lines).
(see here for a example of how to: http://xahlee.org/UnixResource_dir/writ/notations.html
)

PS as a after-thought, i decided to post this to perl, python, and
java too. This will take about the same number of lines in perl as in
Common Lisp. Probably llightly more in Python due to syntax. In Java,
it will be one million lines.

Gratuitous poem of the day:

in the climb to geekdom,
you have few rungs to catch,
before you see my ass.

 ?Xah Lee, 2005

  Xah
  xah at xahlee.org
? http://xahlee.org/

?



From raxitsheth2000 at gmail.com  Thu May  8 06:25:17 2008
From: raxitsheth2000 at gmail.com (Raxit@MyKavita.com)
Date: Thu, 8 May 2008 03:25:17 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
Message-ID: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>

Hi,

i was reading/learning some hello world program in python.
I think its very simillar to Java/C++/C#. What's different (except
syntax) ?

what can i do easily with python which is not easy in c++/java !?

Tnx,
Raxit
www.mykavita.com


From nyamatongwe+thunder at gmail.com  Sun May 25 01:49:30 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 25 May 2008 05:49:30 GMT
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <K57_j.4322$IK1.4313@news-server.bigpond.net.au>

Sanoski:
> Where can I find icons to use with my programs?

http://sourceforge.net/projects/icon-collection/

    Neil


From kamhung.soh at gmail.com  Mon May 12 19:23:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 09:23:36 +1000
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua2dxmx4ev04yd@melwxp23>

On Tue, 13 May 2008 03:42:30 +1000, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> wrote:

> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

You should join the recruitment and interview panel in your organization  
to test your faith.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From fc14301589 at icqmail.com  Thu May 22 11:16:27 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 23:16:27 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
	<8242bac2-7bbe-472a-8079-cf249e02e4e8@s21g2000prm.googlegroups.com>
Message-ID: <48359038_2@news.tm.net.my>

On 10:48, gioved? 22 maggio 2008 alex23 wrote:

> Have you thought about putting the full project somewhere like
> http://code.google.com/ ?

Greatly apreciated your suggestion, unfortunately I saw it a bit late ;)

My project is available at http://it.geocities.com/call_me_not_now/index.html

I like if somebody will help me to build a GUI. I've look at Eric but I
didn't feel comfortable with, perhaps BOA or the like would give me the
right tools to build a graphic interface.
I'd like something that for the given shapes/widgets will gives the python
code respectively.




From info at wingware.com  Thu May  8 14:47:03 2008
From: info at wingware.com (Wingware)
Date: Thu, 08 May 2008 14:47:03 -0400
Subject: ANN: Wing IDE 3.1 released
Message-ID: <48234AA7.6060408@wingware.com>

Hi,

Wingware has released version 3.1 of Wing IDE.  The release is available for
all three product levels of Wing IDE and can be found here:

http://wingware.com/downloads

*New Features*

This release adds the following features not found in Wing 3.0.x:

* Support for zip archives
* Support for pkg_resources name spaces and eggs
* Support for doctest and nose style unit tests (*)
* Scan for sys.path changes such as those used in buildout
* How-To and support for Google App Engine
* Inline context appropriate templates/snippets integrated with autocompleter (*)
* Word list driven auto-completion in non-Python files (**)
* Quick navigation to files and symbols by typing a fragment (**)
* Improved support for Stackless Python
* Preference to strip trailing white space on save
* Display gi_running and gi_frame for generators
* Improved code analysis for Python 2.5
* Other minor features and bug fixes not found in Wing 3.0.x

(*)'d items are available in Wing IDE Professional only.  (**)'d items are
available in Wing IDE Personal or Professional only.  Please see the change
log at http://wingware.com/pub/wingide/3.1.0/CHANGELOG.txt for a detailed
list of changes.

*About Wing IDE*

Wing IDE is an integrated development environment for the Python programming
language.  It provides powerful debugging, editing, code intelligence,
testing, and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Wing IDE is available in three product levels:  Wing IDE Professional is
the full-featured Python IDE, Wing IDE Personal offers a reduced feature
set at a low price, and Wing IDE 101 is a free simplified version designed
for teaching entry level programming courses with Python.

System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or
Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit).

*Downloads*

Wing IDE Professional and Wing IDE Personal are commercial software and
require a license to run. A free trial license can be obtained directly from
the product when launched.

Wing IDE Pro 3.1:         http://wingware.com/downloads/wingide/3.1
Wing IDE Personal 3.1:    http://wingware.com/downloads/wingide-personal/3.1
Wing IDE 101 3.1:         http://wingware.com/downloads/wingide-101/3.1

*Purchasing and Upgrading*

Wing 3.1 is a free upgrade for all Wing IDE 3.0 users. Any 2.x license sold
after May 2nd 2006 is free to upgrade; others cost 1/2 the normal price to
upgrade.

Upgrade a 2.x license:    https://wingware.com/store/upgrade
Purchase a 3.x license:   https://wingware.com/store/purchase

Thanks,

-- 

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com



From inhahe at gmail.com  Fri May 23 06:29:14 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 06:29:14 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net>
Message-ID: <x_wZj.2757$772.652@bignews2.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:MKwZj.2749$772.668 at bignews2.bellsouth.net...

> if we assume the constraints are that:
> 1.he has list, l
> 2.he has a dictionary, d
> 3.he wants the function to print the values in the dictionary according to 
> a specific order of their keys as defined by the function, followed by the 
> values of the list

It's also possible (even likely) that he knows outside of the function what 
order he wants the values in, and only used an (incidentally) unordered dict 
called kwargs because he thought that's the only way to pass to those 
parameters.  in which case the function could be left untouched and the he 
would call it like this:

args = [1,2,3]
f(*args)
or
f(*[1,2,3])




From wuwei23 at gmail.com  Tue May 27 19:54:46 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 16:54:46 -0700 (PDT)
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
Message-ID: <4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>

On May 28, 9:26 am, globalrev <skanem... at yahoo.se> wrote:
> is there a definitie limit to the nbr of calls or is the memory that
> runs out? is that then the RAMmemory? is there a special amount of
> memory assigned for python or it just takes and takes until windows
> runs out of it?

You can alter the recursion limit using sys.setrecursionlimit:

    setrecursionlimit(n)

    Set the maximum depth of the Python interpreter stack to n.  This
    limit prevents infinite recursion from causing an overflow of the
C
    stack and crashing Python.  The highest possible limit is
platform-
    dependent.


From zerty.david at gmail.com  Sun May 18 13:57:26 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sun, 18 May 2008 14:57:26 -0300
Subject: What's the api tat I should use to connect python to a MS Access Db?
Message-ID: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>

Please answer me the question of the subject =)
-------------- next part --------------
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From mensanator at aol.com  Fri May 23 14:03:16 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 23 May 2008 11:03:16 -0700 (PDT)
Subject: How to print a sorted list as a multi-column table
References: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>
Message-ID: <0ab498fa-7983-4ea0-abcf-cf7f827bd05e@x35g2000hsb.googlegroups.com>

On May 23, 10:30?am, Sverker Nilsson <s... at sncs.se> wrote:
> Hi all,
>
> I would like to ask about opinions about the best way to format sorted
> tables of items for interactive use. I have begun to add interactive
> help to Guppy/Heapy (http://guppy-pe.sourceforge.net) because it lacks
> the usual ways for introspection (see for examplehttp://www.pkgcore.org/trac/pkgcore/doc/dev-notes/heapy.rst) which is
> due to Heapy's use of dynamic things like __getattr__ and to some
> extent properties.
>
> There seems to be no (good or otherwise) way to hook into the standard
> help() (?) (At least not before 2.6 where I recall seeing a __dir__
> magic method may be introduced, but I want it to be backwards
> compatible to at least 2.4, preferably to 2.3.)
>
> So I am about to roll my own help system. It will be based on having
> the API objects supplying a standardized '.help' attribute which can
> be used interactively, and will limit the output it prints to say 15
> or 20 rows at a time.
>
> That's for a background. Now what I was stumbling on which pumped up
> enough adrenalin to make me begin to write this ---
>
> Why are tables formatted like the following, when sorted? (Both in
> linux eg ls, ftp help, and in Python help() when listing (eg)
> modules))
>
> (1)
>
> a ?g ?m ?s
> b ?h ?n ?t
> c ?i ?o ?u
> d ?j ?p ?v
> e ?k ?q
> f ?l ?r

Because it's easier to read when the items have more
than one letter. Have a look at a dictionary.

>
> Wouldn't it be more natural to just sort them like this:
>
> (2)
>
> a ?b ?c ?d
> e ?f ?g ?h
> i ?j ?k ?l
> m ?n ?o ?p
> q ?r ?s ?t
> u ?v

Well, it's certainly easier to program, but ease of
programming often doesn't correlate to ease of use.

>
> What's the rationale for the choice of (1)?

Easier to use although harder to program. Remeber,
the user doesn't care how hard is was for you to
implement.

>
> In a pager, if you want to limit the number of lines output at a time,
> then yo'd see with (1) (if artifically limiting output to 2 lines):
>
> a ?g ?m ?s
> b ?h ?n ?t
>
> So to see the f item you would have to scroll down all the way. ?The
> number of times you would have to scroll down is in completely
> unrelated to the item's position in sort order. That seems to defeat
> the purpose of sorting in the first place. It feels strange, to me at
> least. Anybody had the same feeling?

No.

>
> Well, what's the rationale (if any) for using the layout (1)?
> Wouldn't layout (2) be better? And/or would it be confusing /
> non-pythonic / non-unlixonic if a program used the (2) layout instead?

The obvious solution is to do both, like the DOS directory
command:

c:\python25\user>dir/d
 Volume in drive C has no label.
 Volume Serial Number is D019-C60D

 Directory of c:\python25\user

[.]                                 ken_about_STD.txt
[..]                                ldapart2.py
153.py                              ldas.py
23items.py                          lda_header.py
3n35_ldas.mdb                       legendre.py
3n35_ldas.xls                       long_ago.py
3n_prime.py                         loops_outside_lda.py
5sideddice.xls                      Matlab_useless.py
5_sided_dice.py                     MHtest.py
another_sqlite3_test.py             MHtest2.py
any_good_algo.py                    Minnie_Mouse.txt
attractors023.exe                   mod32.py
attractors025.exe                   mufbuff1.py
attractors_vs_primitiveroots.py     m_version.py

c:\python25\user>dir/w
 Volume in drive C has no label.
 Volume Serial Number is D019-C60D

 Directory of c:\python25\user

[.]                                 [..]
153.py                              23items.py
3n35_ldas.mdb                       3n35_ldas.xls
3n_prime.py                         5sideddice.xls
5_sided_dice.py                     another_sqlite3_test.py
any_good_algo.py                    attractors023.exe
attractors025.exe                   attractors_vs_primitiveroots.py
attractor_test.py                   a_perm_generator.py
bad_doc.py                          base6.py
baseconvert.py                      big_pi_e.py
bits.py                             Book2.xls
buts_in_MH.py                       cc_test.py

>
> Have a (:nice:) weekend :-)
>
> Sverker



From fetchinson at googlemail.com  Wed May 21 21:38:27 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 18:38:27 -0700
Subject: backport of 'set' to python 2.3?
Message-ID: <fbe2e2100805211838o7028c4b3ie2fd59eebba6d6ff@mail.gmail.com>

Does anyone have a pure python implementation of the builtin 'set'
object so that I could use that in python 2.3? If this would be the
case that would be really great as I wouldn't have to change my code
that runs happily on 2.5 and makes use of 'set'. Speed and performance
doesn't matter, any implementation that does exactly the same as the
builtin 'set' in 2.5 would be great.

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From castironpi at gmail.com  Tue May 13 10:52:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:52:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<baeabd42-1edd-4eb0-8481-adc7bdeb6f12@m3g2000hsc.googlegroups.com>
Message-ID: <15a051aa-bc5a-4c7f-be25-693e9bbc40b2@f63g2000hsf.googlegroups.com>

On May 13, 9:45?am, castiro... at gmail.com wrote:
> On May 13, 9:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -
>
> What is a tank a tank of? ?Even if it does, developer communities are
> willing to sustain it. ?That's a pretty colinear judgement, that I
> find the community sustainable. ?Does anyone commute to out of
> control? ?What is to out? ?No jumping down thrown. ?Tut tut.- Hide quoted text -
>
> - Show quoted text -

Now, speaking of thrown: do try-di-di*3es not mean what we're thap
that they used to!

<celebration>


From stef.mientki at gmail.com  Sat May 17 14:54:23 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 17 May 2008 20:54:23 +0200
Subject: multiple databases, what's the best interface ?
Message-ID: <482F29DF.2040804@gmail.com>

hello,

I need to switch fluently between 2 or 3 types of dbases:
SQLite, Sybase ( and in the future MS SQL-server).

I need both closed application and general purpose database manager,
which should run on different platforms (windows, windows mobile, not 
web based).

I would like to write the applications in Python.
What's the best interface so I can use the same program for all databases,
and just have to change the database name, if I want to use another 
database ?

thanks,
Stef Mientki



From mh at pixar.com  Thu May 15 16:47:59 2008
From: mh at pixar.com (mh at pixar.com)
Date: Thu, 15 May 2008 20:47:59 GMT
Subject: call tree tool?
Message-ID: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>

I'm cleaning up some old code, and want to see what orphan
functions might be sitting around.

Is there a static call tree analyzer for python?

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From pball.benetech at gmail.com  Sun May 25 16:22:37 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 13:22:37 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
Message-ID: <3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>

On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > We can use any operation or function which
> > takes and returns sets.
>
> I think the problem is significantly underspecified. It would be a more
> interesting problem if there was a restriction to a few selected set
> operations, e.g. union, intersection, difference, and combinations
> thereof.

Ok, that's quite right -- when I just tried to define "any function,"
I found that all the solutions I came up with were combinations of the
set operations defined for immutable sets. Let me improve the spec as
the following:

There may be arbitrarily many set elements (denoted by integers
1,2,3,...), arbitrarily many combinations of the elements composing
the sets s_i (s0, s1, ...). We can use any of python's set operations
or combination of those operations.

Thanks for the clarification -- PB.




From fiacre.patrick at gmail.com  Fri May 23 05:53:22 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 05:53:22 -0400
Subject: php vs python
In-Reply-To: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <48369413$0$25059$607ed4bc@cv.net>

notbob wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so.  No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
> 
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever.  I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank.  Anyway, so I change over
> to learning php.  Then I run across that blog, Coding Horror, and start
> reading articles like this:
> 
> http://www.codinghorror.com/blog/archives/001119.html
> 
> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
> much.  I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp.  I've taken basic basic and basic
> C, but am barely literate in html.  Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.  
> 
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?
> 
> nb

Personally, I believe PHP would get you more productive more quickly for 
a blog, but it is a potentially brain damaging language in terms of 
really getting your juices flowing with programming.  It is not a 
general purpose language and suffers from all the limitations of of a 
tool designed for one job.  If you are interested in programming and the 
blog is your path to that, stick with Python!  In particular, immerse 
yourself in mod_python or look at a framework like Django or Pylons -- 
the learning curve is steep for any of these technologies but they are a 
full meal compared to saltine cracker and water of PHP.


From castironpi at gmail.com  Wed May  7 00:08:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 21:08:35 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com> 
	<2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com> 
	<2523ca17-c534-44b9-8db7-543a794dc213@e39g2000hsf.googlegroups.com>
Message-ID: <24c3f5d7-46e4-446e-8666-15ccb57c1fab@a1g2000hsb.googlegroups.com>

On May 6, 1:00?pm, hdante <hda... at gmail.com> wrote:
> On May 6, 12:28?am, castiro... at gmail.com wrote:
>
>
>
>
>
>
>
> > There's a process decorator to functions in a module.
>
> > [supposes]
>
> > @process
> > def datafile( processdict ):
> > ? ?processdict.modify( )
> > ? ?op= yield
> > ? ?op.call( ) in processdict
> > ? ?# op.call( ) in namespace
>
> > More simply:
>
> > @process
> > def datafile( processdict ):
> > ? ?processdict.modify( )
> > ? ?interaction_object= yield
> > ? ?invoke( interaction_object, processdict )
> > ? ?#or interaction_object.invoke( **processdict )
> > ? ?processdict.commit( )
>
> > Making each execution of process a self-modifying disk file.
> > Interaction_object could be binary or text. ?If text, we'd have a
> > cross-language executable, but I'm suspicious it wouldn't be vacuous
> > as a Python of Python composition: would other languages pass other
> > than Python programs?
>
> > I think relational databases are the only in there. ?In other words, I
> > think Python would make a wholly better stored procedure and query
> > language than those of databases. ?Certainly I'm suspicious that's
> > naivete speaking up; I question, would it? ?Is there more risk of or
> > opportunity for malicious execution? ?Simply put, can we get
> > primitives in to databases? ?What's an example of a [optionally real]
> > operation on the primitives that doesn't map pretty well into SQL?
> > How do you want to write base-case scenarios if they're going to be
> > literals?
>
> ?Datafiles could be implemented with SQL. Consider SQL:
>
> ?SELECT * FROM process_dict where id = 1
> ?.
> ?SELECT * FROM process_dict where id = 1
>
> ?Obviously, this is all a supposition, I'm not claiming the code is
> perfect (or am I ?). If datafiles could be implemented with SQL and
> storing text requires datafiles, then I can store text with datafiles
> (haha !). Would you consider doing this ? One could even store python
> decorated serialized code using SQL [supposition]. But would it be
> useful [haha !] ?
>
> ?I don't know.- Hide quoted text -
>
> - Show quoted text -

Serialized code has line numbers, which is fine in Python.  (Tab-
indent even comes easier, though it's not clear what granularity
you're storing at, whether each "indention block" gets its own table
or not.)

You are asking for a per-object table.

a= { }
b= [ ]

a[ 'what' ]= object( )

id= new_id( )
process_vars[ id ]= object( )
insert into process_dict.variable_9782 values ( id )
insert into process_dict.variable_9371 values ( 'what', NONPRIMITIVE,
id )

b.append( None )
insert into process_dict.variable_8224 values ( NULL )

b.insert( 0, 0 )
update process_dict.variable_8224 set "column_1"= 0 where index= 0



From ivlenin at gmail.com  Tue May 13 14:36:34 2008
From: ivlenin at gmail.com (I V)
Date: Tue, 13 May 2008 18:36:34 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <SclWj.3437$J16.909@newssvr23.news.prodigy.net>

On Mon, 12 May 2008 16:39:25 -0700, Dave Parker wrote:

> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

A COBOL for the 21st century! Just what we need.


From upton at virginia.edu  Thu May 15 17:26:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 17:26:19 -0400
Subject: call tree tool?
In-Reply-To: <13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805151426i33d2869fx6da0f03136ada654@mail.gmail.com>

On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgraves at gmail.com> wrote:
> On May 15, 3:47 pm, m... at pixar.com wrote:
>> I'm cleaning up some old code, and want to see what orphan
>> functions might be sitting around.
>>
>> Is there a static call tree analyzer for python?
>
> How about
> http://pycallgraph.slowchop.com/
>
> ...
> Jay Graves
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Have you checked to see if PyChecker or pylint can help you?
Apparently they can find unused variables at least, I don't know
whether they do functions or not.


From pecora at anvil.nrl.navy.mil  Wed May 28 02:42:06 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Wed, 28 May 2008 08:42:06 +0200
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
Message-ID: <pecora-85C146.08420628052008@ra.nrl.navy.mil>

In article 
<4686e9a0-32bd-4fe6-88b3-bc449bf23206 at 2g2000hsn.googlegroups.com>,
 Dan Bishop <danb_83 at yahoo.com> wrote:

> On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python? ?Not that I plan to name all my variables with hungarian
> > notation, but just for when it's appropriate.
> 
> pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
> vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.

HAHAHAHAHAHA! Beautifully done.  Next time I need to diagram a sentence 
I will come to you.  You're the man.  :-)

-- 
-- Lou Pecora


From martin at v.loewis.de  Fri May 30 13:59:24 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 30 May 2008 19:59:24 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <mailman.1766.1212150318.12834.python-list@python.org>
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <4840407c$0$4845$9b622d9e@news.freenet.de>

>> File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
>>     sql = unicode(sql, self.Encoding)
>> LookupError: unknown encoding: utf_8_euro
> 
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue.

It's definitely not a Python issue.

> As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.

The problem is that self.Encoding is incorrect - it should not be
utf_8_euro. Instead, it should be UTF-8 (or perhaps utf_8). DABO
shouldn't use locale.getdefaultlocale()[1], but
locale.getpreferredencoding().

Regards,
Martin


From cwitts at gmail.com  Wed May  7 10:00:48 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 7 May 2008 07:00:48 -0700 (PDT)
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23> 
	<3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com> 
	<slrng23be7.rpn.hat@se-162.se.wtb.tue.nl>
Message-ID: <e80e60b8-fab2-498e-b480-f3068d514c12@a1g2000hsb.googlegroups.com>

On May 7, 3:25?pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-07, Chris <cwi... at gmail.com> wrote:
>
> >>>> os.chdir('C:\temp\my test')
> > Traceback (most recent call last):
> > ? File "<input>", line 1, in <module>
> > WindowsError: [Error 123] The filename, directory name, or volume
> > label syntax is incorrect: 'C:\temp\\my test'
>
> Python strings have \ escapes, such as \t, \n etc. Above you try to go to
>
> C:<TAB>emp\my test
>
> and you are lucky that \m is not something special.
>
> Either escape your back slashes ("C:\\temp\\my test") or use raw strings
> (r"C:\temp\my test").
>
> Sincerely,
> Albert

My personal preference is using backslashes, if it's something quick
or if it's something that will be sitting on a server in a dark corner
for a long time to just use os.path.join.  I've had neither of those 2
break on me. ;)


From vlastimil.brom at gmail.com  Wed May  7 09:00:18 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 15:00:18 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
Message-ID: <9fdb569a0805070600h17de678dg87c3dfde013499e9@mail.gmail.com>

Hi David,
thanks for your suggestions.
The mentioned line of code is actually already a part of such
a searching method,  thus it is beeing called in a similar way you
suggested, but anyhow it catched my eye ...;  Thanks for the references to
different markup systems, I haven't known many
of them before - I wish I had found them some moths ago - my searches
were probably too specific.
I'll take a look at it and see, if something could be used or adapted for my
current code.

Greetings,
   Vlasta
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From tal.no.no.spam at gmail.com  Wed May 14 11:24:29 2008
From: tal.no.no.spam at gmail.com (Tal Einat)
Date: Wed, 14 May 2008 08:24:29 -0700 (PDT)
Subject: What's a call-tip to do?
Message-ID: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>

Hi all,

I just ran into this. In IDLE (Python 2.5), the call-tip for
itertools.count is:
"x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

That's itertools.count.__init__.__doc__, while itertools.count.__doc__
is the informative doc-string ("DS" henceforth):
"""count([firstval]) --> count object

Return a count object whose .next() method returns consecutive
integers starting from zero or, if specified, from firstval."""


That seems very counter-intuitive to me - I would expect the DS for
__init__ to explain how to use the constructor.

IDLE's call-tip module obviously thinks so as it prefers the __init__
DS to the class's DS. IPython does the opposite as far as I can tell,
when I enter 'itertools.count?' it shows the class's DS, but shows
nothing for a custom class whose __init__ has a DS while the class
itself does not.

I'm wondering what a call-tip mechanism should do when a class and its
__init__ both have a DS. I'd be willing to work up a patch for IDLE's
call-tip module to work better in this regard, or for itertools and
similar classes in the stdlib, if needed.


- Tal Einat
reduce(lambda m,x:[m[i]+s[-1] for i,s in enumerate(sorted(m))],
      [[chr(154-ord(c)) for c in '.&-&,l.Z95193+179-']]*18)[3]


From larry.bates at websafe.com`  Fri May 16 09:09:13 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 08:09:13 -0500
Subject: Problem creating a shorcut
In-Reply-To: <577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
Message-ID: <CLudna01D6ocGrDVnZ2dnUVZ_u-dnZ2d@comcast.com>

Mike Driscoll wrote:
> On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>> Mike Driscoll wrote:
>>> Hi,
>>> I've had this niggling issue from time to time. I want to create a
>>> shortcut on the user's desktop to a website that specifically loads
>>> Firefox even if Firefox is not the default browser.
>>> I usually use COM as it allows very specific settings of the shortcut,
>>> such as the Working Directory and the Target Path. However, the
>>> following will not work for some reason:
>>> <code>
>>> import win32com.client
>>> import winshell
>>> shell = win32com.client.Dispatch('WScript.Shell')
>>> userDesktop = winshell.desktop()
>>> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
>>> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
>>> https:\www.myCompanyWebsite.com\auth\preauth.php'
>>> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
>>> Firefox'
>>> shortcut.save()
>>> </code>
>>> This creates the following target path (which doesn't work):
>>> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
>>> \www.myCompanyWebsite.com\auth\preauth.php"
>>> If I leave the website off, it works. If I leave the path to Firefox
>>> out, it works too. Is there another method I can use other than
>>> creating the shortcut by hand and using the shutil module?
>>> Thank you for any ideas.
>>> Mike
>> Either you copied wrong or the problem is:
>>
>> "C:\"C:\Program Files...
>>
>> Note the C:\ is specified twice in the string.  I think it should read:
>>
>>  > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
>>  > \www.myCompanyWebsite.com\auth\preauth.php"
>>
>> -Larry
> 
> Yeah, I know that it's in there twice and that that is the problem.
> But I'm not causing that extra C:\. I run it exactly as above and that
> is what I get for the output. I think it's the COM object. Maybe I
> better just re-post this to the PyWin32 list...
> 
> Thanks,
> 
> Mike

I use Inno Setup on most of my applications and use it to create my desktop, 
quicklaunch and Start shortcuts.  Would that be an option for you?

-Larry


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 11:55:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 17:55:54 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1elf9$a0s$01$1@news.t-online.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<mailman.1599.1211790412.12834.python-list@python.org>
	<g1elf9$a0s$01$1@news.t-online.com>
Message-ID: <483add88$0$10998$426a74cc@news.free.fr>

Sebastian 'lunar' Wiesner a ?crit :
(snip)
> Django is one of these "MFC type frameworks" 

Actually it's "MVC", not "MFC" !-)



From kyosohma at gmail.com  Thu May 22 13:07:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 10:07:49 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
Message-ID: <52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com>

On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
> Hello all, I have written a simple program, and at the end of it,
> instead of it closing I would like it to restart from the beggining.
> Is there a way to do this? Put my code into a class function, or
> something?
> I guess I could do a while loop, but I think if there is a way to run
> my code if it's in a class would be an easier option. I can't seem to
> find many guides online but maybe I have not been looking in the right
> places.
>
> Anybody have any ideas?

Putting your code in a function or class is probably the way to go.
When I was doing C++, we'd just use a while loop for simple stuff,
though.

It really shouldn't be all that hard to tell the code to call up the
beginning of the program again.

Mike


From aisaac at american.edu  Thu May  8 18:07:03 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 22:07:03 GMT
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <bQKUj.8781$0L.2506@trnddc07>

Anton Slesarev wrote:
> I've read great paper about generators:
> http://www.dabeaz.com/generators/index.html 
> Author say that it's easy to write analog of common linux tools such 
> as awk,grep etc. He say that performance could be even better. 
> But I have some problem with writing performance grep analog. 


https://svn.enthought.com/svn/sandbox/grin/trunk/

hth,
Alan Isaac


From grante at visi.com  Wed May 21 10:04:02 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 21 May 2008 09:04:02 -0500
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <D6udnVPRN5dPtqnVnZ2dnUVZ_qHinZ2d@posted.visi>

On 2008-05-20, Robert Kern <robert.kern at gmail.com> wrote:

>> I'm looking at the struct module for binary packing of ints
>> and floats.  The documentation refers to C datatypes.  It's
>> been many years since I looked at C, but I seem to remember
>> that the data type sizes were not fixed -- for example, an int
>> might be two byes on one machine, and four bytes on the next.
>> Can any C programmers verify this?  If it is true, does that
>> mean that struct.pack('h', 8001) might give me different 
>> results depending on the machine it's running on?
>
> Right. I believe (but could be wrong) that "char" is defined
> to be one byte,

Yes, C defines "char" to be one byte, but it doesn't define the
size of a "byte" other than it's at least big enough to hold
one character (or something like that).  In practice, a byte is
pretty much guaranteed to be at least 8 bits.  But, on some
targets a "byte" is 16 bits, and on others a byte is 32 bits.

However, I'm not aware of any Python implementations on those
targets...

-- 
Grant Edwards                   grante             Yow! Clear the laundromat!!
                                  at               This whirl-o-matic just had
                               visi.com            a nuclear meltdown!!


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From marc at stopspam.goldak.ca  Mon May 26 19:32:58 2008
From: marc at stopspam.goldak.ca (Marc Pelletier)
Date: Mon, 26 May 2008 18:32:58 -0500
Subject: graphical ide??
Message-ID: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>

Hello,

I am just getting started in Python with the intention of tweaking an 
opensource wxPython project called Brewsta. I've been reading python 
documentation and the code, and its starting to make sense, but there seems 
to be an awful lot of boilerplate required to make such an application 
work.

Are there any ides that help out? There seem to be lots of options, and 
I've been downloading like crazy, but nothing so far that stands out. Are 
there any tips or tutorials specific to doing gui development?

cheers

Marc Pelletier


From aguirre.adolfo at gmail.com  Wed May  7 22:11:19 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 19:11:19 -0700 (PDT)
Subject: DISLIN setup: can not open file map0.dat and all the others
Message-ID: <adc30b16-d3f5-4a84-b6d3-5a635fbac3f9@34g2000hsf.googlegroups.com>

I tried reinstalling the program and the DISLIN/PYTHON SETUP window
showed up with the OK button almost covered by the cancel button.

The window is too small so I extend the edges but the superimposed
cancel button still on top.
Using the edge of the OK button I press the arrow there and two
windows are opened:

    * one says: can not open file map0.dat
    * the oher one is the Dislin setup window that shows the anme of
the file ebing called, the path , and a completion type of slider. I
accept the denial of fle map0.dat and one by one every  other file
comes with a denial.

The strange thing is that the DISLIN setup windows are in Spanish. I
wonder if  because this machine has XP in Spanish is confusing the
setup?

Adolfo


From deets at nospam.web.de  Mon May 26 15:38:27 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 21:38:27 +0200
Subject: Question about wsgi.input
In-Reply-To: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
Message-ID: <6a0htmF35sj8eU1@mid.uni-berlin.de>

inhahe schrieb:
> I'm sorry if this is off-topic, i couldn't find a mailing list OR forum for 
> WSGI (and #wsgi wasn't very helpful).
> 
> i played around with StringIO, and apparently if you write to a stringio the 
> position gets set to the end of the write, so if you read from it again, 
> without using seek, you won't read what comes next, you'll skip to the end 
> of the write.  and if you write without seeking to the end first, you'll 
> overwrite part of the string if the reading hasn't caught up.
> 
> WSGI says that wsgi.input should block if there's more data to be read from 
> the socket, until that data is available. so when the server writes to the 
> file object, what happens to the file position? if i were writing a WSGI 
> app, i would just seek() to the last place my read ended at just to make 
> sure.  but i'm making a server, so i need to know whether i should leave the 
> position at the end of the write, when it blocks (or for that matter, if i'm 
> writing while it's still reading), or at the end of the previous read?

I'm not sure exactly about what you are talking here - but generally, 
wsgi.input should be considerd being a pipe. One (the server) simply 
writes into it. The WSGI-app just reads. No seek.

Diez


From deets at nospam.web.de  Sun May 25 10:53:40 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 16:53:40 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69tcrnF357g9nU2@mid.uni-berlin.de>

> In fact, from a protocol point of view, some of the types really do depend 
> on each other.  We send counted strings, for example, so we can't send a 
> string until we know how to send an int (for the string length).  If the 
> first test that fails is the string test, I know right off that the problem 
> is not in how we send ints, because that test ran already and it passed.
> 
> Earlier, I gave another example of wanting tests to be run in the same 
> order as some externally controlled set of functional requirements.  Again, 
> not because the tests have inter-dependencies, but because it just makes it 
> easier to interpret the results.
> 
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the 
> only reason you want to run tests in a specific order.

Both these points can be solved by application of output ordering or 
even better using groups of tests inside individual modules that test 
e.g. basic functionality. Selecting these to run first before trying to 
run more complicated tests is much more senseful than just letting a 
single test run in a determined order.

Diez


From marco at sferacarta.com  Wed May  7 08:37:43 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:37:43 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <Xns9A97897C78229duncanbooth@127.0.0.1>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
	<Xns9A97897C78229duncanbooth@127.0.0.1>
Message-ID: <tohUj.34582$o06.12139@tornado.fastwebnet.it>

Duncan Booth wrote:

> Perhaps if you'd copied all of my code (including the decorator that was 
> the whole point of it)...

Sure, I missed the point. Python's > symbols become quoting levels and 
mess up messages.

Anyway, I would loathe to start execution of a generator before starting 
to iterate through it. Especially when generators are passed around.
The current behavior makes perfect sense.



From ivan.illarionov at gmail.com  Tue May 27 21:42:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 01:42:50 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <g1idaq$r5$2@news.mtu.ru>

On Wed, 28 May 2008 01:32:24 +0000, Ivan Illarionov wrote:

> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>> 
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>> 
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>> 
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

I want to add
TROLL WARNING:
this message is cross-posted between comp.lang.python and comp.lang.php
Let's stop.


From castironpi at gmail.com  Wed May 14 18:28:05 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 15:28:05 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com> 
	<873aokzgs9.fsf@benfinney.id.au>
Message-ID: <aea52155-79d1-43ba-be28-add2c81e362c@a1g2000hsb.googlegroups.com>

On May 14, 5:01?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > On 14 mai, 18:20, castiro... at gmail.com wrote:
> > > I'm concerned over the future of Python. ?Should tuples be named?
>
> > Obviously not, unless they should.
>
> Clearly they should, unless not.
>
> Ben Finney

I have plenty of uses for them!


From george.sakkis at gmail.com  Sat May  3 02:14:12 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 23:14:12 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com> 
	<7c197680-2a56-44ec-b414-67c72b6a9ce9@d1g2000hsg.googlegroups.com>
Message-ID: <c8551065-59f2-4d04-a4a2-95bbbebc383f@c58g2000hsc.googlegroups.com>

On May 2, 4:49?pm, Mensanator <mensana... at aol.com> wrote:
> On May 2, 2:57?pm, George Sakkis <george.sak... at gmail.com> wrote:
>
>
>
> > On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
>
> > > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > > > Shawn Milochik wrote:
> > > > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > > > can this be done in Gmail?
>
> > > > Set up a filter that looks for some phrase in the mail headers that
> > > > identifies messages originating from google groups. ?Gmail's filters are
> > > > fairly flexible. ?I'd probably just have it look for certain words.
> > > > Look at an e-mail's source (raw view) and particularly check in the
> > > > headers for things to filter by.
>
> > > Why don't you just block all messages from Gmail?
>
> > Look up the term "false positive" before you make such brilliant
> > suggestions in the future.
>
> _I_ understand it. Perhaps you should give this advice to the
> ones who suggest blocking Google Groups.

My apologies if you were just being ironic, I took it as a serious
suggestion.

George


From mail2spj at yahoo.com  Mon May 19 11:18:16 2008
From: mail2spj at yahoo.com (SPJ)
Date: Mon, 19 May 2008 08:18:16 -0700 (PDT)
Subject: Running commands on cisco routers using python
Message-ID: <370266.8634.qm@web50101.mail.re2.yahoo.com>

Is it possible to run specific commands on cisco router using Python? 
I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.

Thanks,
SPJ 


      


From larry.bates at websafe.com`  Fri May 16 09:12:49 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 08:12:49 -0500
Subject: Dbase / foxpro files
In-Reply-To: <5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>
Message-ID: <3ZKdnVuQvcPEFbDVnZ2dnUVZ_jCdnZ2d@comcast.com>

martindesalinas at gmail.com wrote:
> look at
> 
> http://pypi.python.org/pypi?%3Aaction=search&term=dbf&submit=search
> 
> i use dbfpy

That's another option.  The caveat is that dbfpy specifically states that it 
only works on "simple" files.  I'm pretty sure ODBC is universal.

The nice thing about using ODBC is that:

1) Nothing to install, every Windows machine has ODBC
2) If you upgrade to some other ODBC compliant database you have little or no 
changes that are required to your application.

Just my 2 cents.

-Larry


From spamtrap at dot-app.org  Sat May 10 12:26:45 2008
From: spamtrap at dot-app.org (Sherman Pendley)
Date: Sat, 10 May 2008 12:26:45 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
	<IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>
Message-ID: <m1k5i2rupm.fsf@dot-app.org>

Lew <lew at lewscanon.com> writes:

> You guys are off topic.  None of the million groups to which this
> message was posted are about netiquette.

Netiquette has come up at one point or another in pretty much every
group I've ever read. It's pretty much a universal meta-topic.

sherm--

-- 
My blog: http://shermspace.blogspot.com
Cocoa programming in Perl: http://camelbones.sourceforge.net


From castironpi at gmail.com  Wed May  7 10:07:07 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 07:07:07 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org>
Message-ID: <64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>

'''
On May 6, 4:43 pm, pyt... at bdurham.com honoring:

>>> a.next( )
( "I", )
>>> a.throw( up )
( "I", "A" )
>>> a.next( )
( "I", "B" )
>>> a.next( )
( "I", "C" )
>>> a.throw( down )
( "II", )
'''

#funny declaration
class up( Exception ): pass
class down( Exception ): pass

def outline( ):
    stack= [ 1 ]
    while 1:
        try:
            yield stack
            stack[ -1 ]+= 1
        except up:
            stack.append( 1 )
        except down:
            stack.pop( -1 )
            stack[ -1 ]+= 1

a= outline( )
print a.next( )
print a.throw( up )
print a.next( )
print a.next( )
print a.throw( down )
print a.throw( up )
print a.throw( up )
print a.next( )
print a.next( )
print a.throw( down )

##output:

[1]
[1, 1]
[1, 2]
[1, 3]
[2]
[2, 1]
[2, 1, 1]
[2, 1, 2]
[2, 1, 3]
[2, 2]

##

cf.

formatter.NullFormatter.format_counter
formatter.NullFormatter.format_letter
formatter.NullFormatter.format_roman


From stef.mientki at gmail.com  Sat May 24 15:32:28 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 21:32:28 +0200
Subject: Scipy+SQLite crashes... , was:  Re: SQLite import fails sometimes
	?
In-Reply-To: <48381CDF.4090309@gmail.com>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>	<mailman.1523.1211631350.12834.python-list@python.org>
	<48381851$1@news.mel.dft.com.au> <48381CDF.4090309@gmail.com>
Message-ID: <48386D4C.2040405@gmail.com>

hello,

through the scipy group I found a solution (no explanation yet),

  import sqlite3
  from scipy import *

solves the problem.

cheers,
Stef

Stef Mientki wrote:
> John Machin wrote:
>> Stef Mientki wrote:
>>
>>> I don't know if this matters, but I also use sqlite3 from other than 
>>> Python programs.
>>
>> You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
>> Python, and (I guess) you have another instance of sqlite3.dll 
>> somewhere else, for use "from other than Python programs". Are they 
>> the same version? If not, this may be the problem. Start up your 
>> other application, then try to import sqlite3 from Python. If this is 
>> the problem, and you must be able to run both apps simultaneously, 
>> you will probably need to update one or the other.
>>
>> Cheers,
>> John
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> thanks John,
>
> I think I hit the problem, ;-)
> but I don't have a solution yet :-(
>
> After creating the simplest program that did work :
>
> import sqlite3
>
> I started adding every import statement used in my program,
> until the program crashed,
> and here is the simplest program that crashes:
>
> from scipy import *
> import sqlite3
>
> Traceback (most recent call last):
>  File "D:\Data_Python\P24_PyLab_Works\module1.py", line 2, in <module>
>    import sqlite3
>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
>    from dbapi2 import *
>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>    from _sqlite3 import *
> ImportError: DLL load failed: Invalid access to memory location.
>
> Any solutions ?
> (btw I need to do the *-import, because I create an easy user 
> environment to do math and physics)
>
> thanks,
> Stef Mientki
>
>



From regnarg at seznam.cz  Sun May 11 04:13:26 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Sun, 11 May 2008 10:13:26 +0200
Subject: Unimport statement
In-Reply-To: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
References: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
Message-ID: <20080511081326.GA13843@sirius>

The main problem are references to objects within a module, because
we can NEVER be sure there aren't any, even though we cleaned up
everything, that's just a consequence of Python nature. We can keep
the old objects referenced and it would make an equivalent to the
reload() builting, just without loading the module, in effect the
same as removing it from sys.modules and deleting imported references.
I do not see any possibe clean way to unload a module...

On Ne, kv? 11, 2008 at 10:02:15 +0200, wxPythoner at gmail.com wrote:
> We should have that statement, so that problems, expressed in
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/3bda1fc4895ec886/bc5fe40cfbd10124?lnk=raot#bc5fe40cfbd10124,
> would not occur.




From paddy3118 at googlemail.com  Sun May 18 13:27:37 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 18 May 2008 10:27:37 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <e8efb125-e9a2-43f8-a0b7-772b2f3543fd@8g2000hse.googlegroups.com>

On May 13, 6:10 pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight theusage of Pythonin
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Ciranova uses Python and manages to allow its customers to migrate
their Designs from a proprietary format that dominates the market
using Python: http://www.ciranova.com/index.html

- Paddy.


From castironpi at gmail.com  Tue May 13 07:16:19 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:16:19 -0700 (PDT)
Subject: feedparser
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com> 
	<mailman.1044.1210676785.12834.python-list@python.org>
Message-ID: <1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>

On May 13, 6:06?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:30:44 -0300, Mike <42fli... at gmail.com> escribi?:
>
>
>
>
>
> > I'm trying to use the feedparser module (http://www.feedparser.org/).
>
> > Is it possible to use this without running the setup program?
>
> > I don't see why not, seems like I'm missing something obvious.
>
> > My directory structure is:
>
> > myprogram.py
> > ? ? /feedparser
> > ? ? ? ? /feedparser.py
>
> > I know I can install the module in the modules directory but would like ?
> > to
> > avoid this for two reasons: I'm only using it for the one project so ?
> > would
> > like to keep it seperate, and if I move to a shared host I may not be
> > allowed to install additional modules (not sure if this is correct ?
> > though).
>
> The easiest way would be to put the single module feedparser.py in the ?
> same directory as your program (I don't ?completely get your reasons not ?
> to do that). OR put feedparser.py in some other directory that is already ?
> listed in sys.path. OR add the directory containing feedparser.py to ?
> sys.path, just at the beginning of your program.
>
> > I've tried:
>
> > import feedparser
>
> > import feedparser.feedparser
>
> > from feedparser import feedparser
>
> > What am I doing wrong? :)
>
> *IF* the directory 'feedparser' were a package (that is, if it contained a ?
> file __init__.py), then that last import statement would be valid. But I ?
> don't reccomend doing this; you're changing the module's environment.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

The malicious thing to do would be spam Python servers with 'import
Lib' and common locale-specific-language short words for techs: import
biblio, import server--- things we might all want really small-to-zero
numbers of... if in numbers... and such as columns of instancy (the
currency), from the instant of instant message.  So, can you tank my
laptop, or can I go tanking the town?


From yguan08 at gmail.com  Tue May 13 16:27:09 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 13:27:09 -0700 (PDT)
Subject: help with file path exceeding 255 characters
Message-ID: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>

I have trouble of obtaining the file size of a file because the
fullpath exceeds 255 characters. I get this message with
os.path.getsize(fullpath).

fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
\Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
\Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
\HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"

fsize = os.path.getsize(fullpath)


WindowsError: [Error 206] The filename or extension is too long:

The same thing with os.stat(fullpath).

I tried using the relative path, but it does not work with the message
fname not found.

dir = os.path.dirname(fullpath)
fname = os.path.basename(fullpath)
os.chdir(dir)
filesize = os.path.getsize(fname)

Is there a walk around of this?


From hdante at gmail.com  Fri May  9 10:08:06 2008
From: hdante at gmail.com (hdante)
Date: Fri, 9 May 2008 07:08:06 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>

On May 8, 7:25?am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?

 All the languages have similar "power", in a theoretical sense. If
you can solve a problem with one, most of the time you'll be able to
solve it with the other. So we could say that the languages are
"equal".

 However, in practice, the syntax matters a lot. For example, they
will influence on the maintainability and the performance of your
application.

>
> what can i do easily with python which is not easy in c++/java !?

 Pretty much everything. Python syntax is minimalist, so it requires
much less code. There are many examples in Wikipedia, for example:

 http://en.wikipedia.org/wiki/User_datagram_protocol#Sample_code_.28Python.29
 http://pt.wikipedia.org/wiki/Radix_sort#C.C3.B3digo_em_Java
 http://en.wikipedia.org/wiki/Observer_pattern#Python

 etc.

>
> Tnx,
> Raxitwww.mykavita.com



From notbob at nothome.com  Wed May 21 17:26:43 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:26:43 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<vilain-E51950.13561721052008@comcast.dca.giganews.com>
Message-ID: <ns0Zj.203$y_.191@fe091.usenetserver.com>

On 2008-05-21, Michael Vilain <vilain at NOspamcop.net> wrote:

> your site.  They may even have a blogging package you can administer 
> entries without any programming.
>
> What's your end-goal here?  If you can't program, you may be better off 
> with a package or tool that does all the heavy lifting for you.  

I said I didn't want to do that, but that's not entirely true.  I figured
I'd use one of the CMSs while learning how it works, much like linux.  I
hate doing something without knowing why.  Windows and Dreamweaver are good
examples.  Nope.  I want to get under the hood.

nb


From skunkwerk at gmail.com  Thu May  8 18:45:45 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Thu, 8 May 2008 15:45:45 -0700 (PDT)
Subject: threading - race condition?
Message-ID: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>

i'm getting the wrong output for the 'title' attributes for this
data.  the queue holds a data structure (item name, position, and list
to store results in).  each thread takes in an item name and queries a
database for various attributes.  from the debug statements the item
names are being retrieved correctly, but the attributes returned are
those of other items in the queue - not its own item.  however, the
model variable is not a global variable... so i'm not sure what's
wrong.

i've declared a bunch of worker threads (100) and a queue into which
new requests are inserted, like so:

queue = Queue.Queue(0)
 WORKERS=100
for i in range(WORKERS):
	thread = SDBThread(queue)
	thread.setDaemon(True)
	thread.start()

the thread:

class SimpleDBThread ( threading.Thread ):
   def __init__ ( self, queue ):
		self.__queue = queue
		threading.Thread.__init__ ( self )
   def run ( self ):
		while 1:
			item = self.__queue.get()
			if item!=None:
				model = domain.get_item(item[0])
				logger.debug('sdbthread item:'+item[0])
				title = model['title']
				scraped = model['scraped']
				logger.debug("sdbthread title:"+title)

any suggestions?
thanks


From gagsl-py2 at yahoo.com.ar  Tue May 20 19:24:54 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 20:24:54 -0300
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
Message-ID: <op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 10:28:51 -0300, castironpi <castironpi at gmail.com>  
escribi?:

> You meant 'thd1.start( )' and 'thd2.start( )'.

Wow! A message with a high S/N ratio coming from you!
And it's not the first I've seen - whatever pills you're taking, they're  
good for you...

-- 
Gabriel Genellina



From pm604407 at gmail.com  Sat May 31 00:50:53 2008
From: pm604407 at gmail.com (meg)
Date: Fri, 30 May 2008 21:50:53 -0700 (PDT)
Subject: compatability
References: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>
Message-ID: <3b22181c-2308-4fa4-825e-22bc06d6f2fe@u6g2000prc.googlegroups.com>

On May 31, 8:32 am, budcrand... at hotmail.com wrote:
> I'm currently using 3ds Max Design 2009 and Maya. Will Python and
> Plone be compatible with my systems? I would really like to
> incorporate this software. Thank You Bud   budcrand... at hotmail.com.

http://trishafilmactress.blogspot.com/2008/05/modern-trisha.html


From richietommy at yahoo.com  Fri May  2 15:50:46 2008
From: richietommy at yahoo.com (Rich)
Date: Fri, 2 May 2008 12:50:46 -0700 (PDT)
Subject: Help with pyserial and sending binary data?
Message-ID: <721268.64699.qm@web52409.mail.re2.yahoo.com>

Hello,

I am working on a python library for sending and receiving data from a Subaru's ECU (the fuel injection computer) via the OBD-II port and an OBD to USB cable, with the Subaru Select Monitor protocol. There are a few open source programs that do this already (http://romraider.com/ , http://jdash.sourceforge.net/ , http://tari.co.za/downloads/software/source/ ), but they are written in Java or C++. I have never done anything with serial before, and very little with binary data, so this is all new to me. 

The SSM protocol is fairly simple - a request packet (all in binary, represented in hex) consists of a header (0x80), destination byte (0x10 for the ECU), source byte (0xf0 for the diagnostic tool - AKA your computer), Payload length in hex, the Payload, which is one of 6 known commands(0xA0 Read memory, 0xA8 Read single address, 0xB0 Write memory, 0xB8 Write single address, 0xBF ECU init) and addresses or address range, then the checksum byte, which is the 8 least-significant bits of the sum of the rest of the request packet.

A returned packet consists of a header, destination byte (your computer), source byte (ECU), payload size (all data between payload size and checksum byte), and the same checksum byte. Further reading (pretty good documentation on the protocol) is here: http://tari.co.za/downloads/documentation/ssm.pdf , but that is the basics to at least say hi to your car from your computer. 

So I've been messing with it, and in as few lines as possible, this should in theory, send the init command to the ECU (0x80 0x10 0xF0 0x01 0xBF 0x40), and the ECU should return its ID to let you know that you can now chat (something like 0x80 0xF0 0x10 0x39 0xFF 0xA2 0x10 0x0F 0x1B 0x14 0x40 0x05 0x05 0x73 0xFA 0xEB ......):

#--------------------------
import serial, string
output = " "
ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
while output != "":
   output = ser.read()
   print hex(ord(output))
#--------------------------

The only problem is that when I send the ECU init command, it just echos back the data I sent it, which, from my understanding, means that I sent an invalid request packet. I'm guessing that there aren't many people on this list with OBD-II subarus and an open port cable ( http://www.tactrix.com/product_info.php?products_id=36 ) that could test this out, but in the off chance there is, perhaps you could help. I've been chatting with the RomRaider developers ( http://www.romraider.com/forum/topic3129.html ) on the subject, but they are Java guys, not Python guys. There is more encompassing code there, but something lies wrong in my basic implementation above.

My best guess I have heard is that chr() isn't encoding the hex value properly to a byte value the ECU understands (wrong endianness?), or chr() encoding isn't always representing hex as an 8-bit byte. chr() should always encode to an 8-bit byte (not 7-bit ASCII or anything, correct)? Is there any way to switch byte endianness, or ensure I am encoding 8-bit bytes? Any help is much appreciated. Thanks!

 -rich



      ____________________________________________________________________________________
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From hniksic at xemacs.org  Wed May 21 07:47:59 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 21 May 2008 13:47:59 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
Message-ID: <87fxsbzxn4.fsf@mulj.homelinux.net>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid>
writes:

> The canonical solution is to iterate over a list of
> expression,function pairs, ie:

Although that solution is pretty, it is not the canonical solution
because it doesn't cover the important case of "if" bodies needing to
access common variables in the enclosing scope.  (This will be easier
in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
IMHO closer to a canonical solution to this FAQ.


From bj_666 at gmx.net  Fri May 23 17:58:56 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 21:58:56 GMT
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <69ot10F33dagrU2@mid.uni-berlin.de>

On Fri, 23 May 2008 13:36:55 -0700, davidj411 wrote:

> example of open method on file object:
> fhandle=open(filename).readelines()

Here the name `fhandle` is somewhat misleading.  You don't bind the file
object to that name, but the result of the call of the `readlines()`
method.  Which is a list of lines.  If you would have bound the file
object, you'd observe similar behavior to your CSV reader example.

> example of csv.reader method:
> reader = csv.reader(open(csvfilename))

Because here you are binding the reader object.  Throw in a `list()` to
read all CSV records into a list:

records = list(csv.reader(open(csv_filename)))

In both cases you don't close the file explicitly which might cause
problems.  That CPython closes it for you almost immediately is an
implementation detail.  Other implementations might let those open files
stay open for much longer.

Ciao,
	Marc 'BlackJack' Rintsch


From laurent.ploix at gmail.com  Thu May 29 16:20:08 2008
From: laurent.ploix at gmail.com (=?ISO-8859-1?Q?m=E9choui?=)
Date: Thu, 29 May 2008 13:20:08 -0700 (PDT)
Subject: Python and Flaming Thunder
References: 4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com
Message-ID: <bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>

On May 28, 11:46 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > Kind of like how this year's program won't work on next year's
> > > Python?
>
> > For somebody who has admitted to have only very rudimentary knowledge of
> > python that's a pretty bold statement, don't you think?
>
> Everthing I know, I learned from Wikipedia. ;)
>
> http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_a...
>
> "Like Perl 6, Python 3.0 will break backward compatibility. There is
> no requirement that Python 2.x code will run unmodified on Python 3.0.
> There are basic changes such as changing the print statement into a
> print function (so any use of the print statement will cause the
> program to fail) ..."

Hi Dave,

Why don't you use your own FT google group to explain why FT is sooooo
much better than other languages (python included). Then you post
__once__ that you started such a conversation, and that's it. I'm sure
all smart developers will have a look and they will all follow you.

The other ones (the ones, including me, who are interested in reading
about python) will keep on having narrow minded conversations about
their favorite snake-oriented language. Poor guys that we are, we
won't even realize how superior you are, how great your language is,
how faster FT is, etc... We will be jobless in no time, and soon you
will have 90% of the language market and make tons of money.

I wish I could be smart enough to realize this. Unfortunately, I'm
just soooo stupid. So please don't steal my brain-cpu cycles, I need
them for better purposes.

Thanks for helping me


From deets at nospam.web.de  Wed May 28 15:26:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 21:26:08 +0200
Subject: Threads and import
In-Reply-To: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <6a5pulF36888qU1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> Hi,
> 
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
> 
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
> 
> import threading
> class TestThread(threading.Thread):
> 
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
> 
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
> 
> # end of sample script
> 
> Now if I run this using:
> 
> $ python ThreadTest.py
> 
> then it behaves as expected, ie an output like:
> 
> start
> finish
> 0
> 1
> 2
> ...
> 
> But if I run it as follows (how the inherited code was started):
> 
> $ python -c "import TestThread"
> 
> then I just get:
> 
> start
> 
> 
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

Works for me. And I don't see any reason why it shouldn't for you - 
unless you didn't show us the actual code.

Diez


From george.sakkis at gmail.com  Mon May 26 17:53:59 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 14:53:59 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <83085ff0-df50-4972-840e-6281440b3045@z66g2000hsc.googlegroups.com>

On May 25, 7:25?pm, "xah... at gmail.com" <xah... at gmail.com> wrote:

> For about the past 10 years, i have been concerned in the programing
> community's level of education in social issues.

Yet another great sample of delusional self-importance from the master
of mental masturbation.


From giltay at gmail.com  Wed May 28 15:25:21 2008
From: giltay at gmail.com (giltay at gmail.com)
Date: Wed, 28 May 2008 12:25:21 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <da899680-cd90-4711-8829-a3b0e9af21af@56g2000hsm.googlegroups.com>

On May 28, 12:09 pm, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
[...]
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?

I tend to use string constants defined at the module level, e.g.:

##----- in jobclass.py:
# Status indicators
IDLE = 'IDLE'
RUNNING = 'RUNNING'
FINISHED = 'FINISHED'

class Job(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.status = IDLE

    def run(self):
        self.status = RUNNING
        self.do_work()
        self.status = FINISHED
[...]
##----- in another module
job = jobclass.Job()
job.start()
while job.status == jobclass.RUNNING:
    print 'Job is running.'
    time.sleep(SLEEP_SECONDS)
##-----

I've also used dummy objects, eg:

##-----
class RunStatus:
    pass


IDLE = RunStatus()
RUNNING = RunStatus()
FINISHED = RunStatus()
##-----

I've had lots of success with these two methods.  If you think an
enumeration is the most appropriate way, then:

##-----
RunStatuses = Enum('idle', 'running', 'finished')
IDLE = RunStatuses.idle
RUNNING = RunStatuses.running
FINISHED = RunStatuses.finished
##-----

I figure if you're only going to have a few dozen enumeration values,
then don't worry about cluttering up the module namespace with
variable names for constants.

Geoff G-T


From unknown_hero007 at hotmail.com  Fri May  9 07:33:36 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 04:33:36 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com>
Message-ID: <c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com>

On 9 touko, 12:51, Unknown Hero <unknown_hero... at hotmail.com> wrote:

> Finally managed to get it to work (heh, I was pretty darn lost even
> though I had the best help) but as promised, I'll post my code here
> for those who might be interested in it. The biggest of thanks to Tim
> Golden, who basically walked me step-by-step through this. Most of the
> code is copied from his examples above.
>
> [large piece of code here]
>
> Not the most effecient code, I'm sure, but it does what I want it to
> do :D
>
> Thank you once more, Tim. Also, thank you, Mike, for your advice on
> saving the registry. I would have forgotten to note backing up the
> registry in the beginning if it wasn't for you bringing that up. :D

Hmm... Improving your code is always fun :D but quick fixes to make it
replace search results that contain something more than 'old' here
don't
seem to work.

So I made it command-line, with arguments Hive, old, new.

If I ran the script as registry.py HKEY_LOCAL_MACHINE something
"something else"
and I had made dummy values to the registry like "there is something
here" it
won't update to "there is something else here".

I tried this, can Tim (or someone else) possibly help?

        if type == _winreg.REG_SZ:
          Character = 0
          Correct = 0
          FoundStart = FoundEnd = 0
          Found = False
          for y in range(len(data)):
            if Character < len(old):
              if old[Character] is data[y]:
                Character = Character + 1
                Correct = Correct + 1
          if Correct is len(old):
            Found = True
            Replace = ""
            Character = 0
            for y in range(len(data)):
              if old[0] is data[y]:
                FoundStart = int(y)
                FoundEnd = FoundStart + oldLength
            for y in range(FoundStart):
              Replace = Replace + data[y]

            for y in range(len(new)):
              Replace = Replace + new[y]

            for y in range(FoundEnd, len(data)):
              Replace = Replace + data[y]

          if Found:
            _winreg.SetValueEx (key.key, name, 0, type, data.replace
(old, Replace))


Thanks in advance.


From bj_666 at gmx.net  Mon May 19 15:56:26 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 19:56:26 GMT
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <69e4baF2uih6aU1@mid.uni-berlin.de>

On Mon, 19 May 2008 12:39:36 -0700, destroooooy wrote:

> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.

That's wrong.  Use ``==`` and ``!=`` for testing equality/inequality and
``is`` and ``is not`` for identity testing.  And testing for identity is
quite rare.  Rule of thumb: Use it only for known singletons like `None`.

Ciao,
	Marc 'BlackJack' Rintsch


From fred.sells at adventistcare.org  Thu May 29 10:20:41 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Thu, 29 May 2008 10:20:41 -0400
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <483EB1F0.70502@timgolden.me.uk>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0932@acesxch01.ADVENTISTCORP.NET>

please excuse slightly off-topic; cannot access turbogears mailing list at the moment.

There was an excellent video by James Ward that showed using turbogears to return json data to adoble's flex UI.  It simply used

@expose("JSON")
def xxxx():
	...
	return dict(x=1, ...)

Is there any equivalent for xml, such as
@expose("XML")
def ....
	return myElementTreeRoot

I need to have more attribute data (for a grid) than I can cleanly do in json and while pyamf might do the trick, It adds a layer of "magic code" that I cannot sell to my team.  Also with xml and json, I can do my UI design with the url pointing to a test data file, then build the backend to match.

any ideas?

thanks

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From george.sakkis at gmail.com  Thu May  8 02:26:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 23:26:46 -0700 (PDT)
Subject: The del statement
Message-ID: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>

One of the few Python constructs that feels less elegant than
necessary to me is the del statement. For one thing, it is overloaded
to mean three different things:
(1) del x: Remove x from the current namespace
(2) del x[i]: Equivalent to x.__delitem__(i)
(3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

(1) is useful, or even necessary, at least as long as there are only
two namespaces (local and global) instead of a separate namespace per
block, so that's ok for now. The other two though, don't justify IMO a
separate statement.

I would strongly prefer (2) to be implemented by a normal method
instead of a special syntax and method. See the inconsistency:
    s = ['a', 'b']
    s.pop(0)
    del s[0]

Likewise for dicts. Why not s.del(0) ? And just in case someone argues
"for the same reason we have __getitem__ and __setitem__", it is not
the same; the syntax for get/set (s[0], s[0] = 'a') doesn't introduce
a new keyword (or overload an existing one), it is pretty intuitive
and used across many languages. As for (3), it is pretty uncommon to
deserve its own syntax; delattr() or directly modifying self.__dict__
are good enough.

I understand that no more proposals are accepted for Python 3 but it
looks like a missed opportunity to make the language a bit simpler and
more consistent. Anyone else have an opinion on this?

George


From d3vvnull at gmail.com  Fri May 30 08:04:27 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Fri, 30 May 2008 07:04:27 -0500
Subject: Hungarian Notation
In-Reply-To: <80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>
Message-ID: <170543c70805300504m93e5903w4cee2038214ce75d@mail.gmail.com>

Variable names should have prefixes or suffixes (as I prefer) that represent
the "kind" of data they represent rather than the data type itself.
For example account_bal_am, order_qt, line_ct, first_nm.  Where am is
amount, qt is quantity and ct is count.  Coding standards could impose rules
on datatypes that should be used for these kinds:  am (amount) is a currency
field and should be represented by decimal values. qt (quantity) is a long,
nm a string and so on.

On Fri, May 30, 2008 at 3:31 AM, Lie <Lie.1296 at gmail.com> wrote:

> On May 27, 12:28 pm, "inhahe" <inh... at gmail.com> wrote:
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python?  Not that I plan to name all my variables with
> hungarian
> > notation, but just for when it's appropriate.
>
> If it was me, I'd use an empty-defined class:
>
> class Fake(object):
>    pass
>
> data = 'headinfo=trash;headtrash=info'
> Header = Fake()
> Header.Str = data
> Header.Dict = parse(data)
>
> it saves name if it's important (alternatively, you may also use a
> dict or a tuple/list to store the string/dict pair).
> But using Fake class just like that is difficult to work with if I
> need to "write" to the data (not read only) and synchronizes the data,
> in that case, it's easy to extend the Fake Class:
>
> class Fake(object):
>    def __init__(self, data):
>        self.data = parse(data)
>
>    def toStr(self):
>        return str(self.data)
>    def fromStr(self, s):
>        self.data = parse(s)
>    Str = property(toStr, fromStr)
>
>    def toDict(self):
>        return self.data
>    def fromDict(self, s):
>        self.data = s
>    Dict = property(toDict, fromDict)
>
> you might go as far as overriding __str__ and __repr__ as appropriate.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From daveparker at flamingthunder.com  Wed May 28 17:37:36 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:37:36 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
Message-ID: <b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>

On May 28, 12:48?pm, "Dan Upton" <up... at virginia.edu> wrote:
> there's no reason "set" itself
> should throw any sort of error in the sense of an exception--in a
> statement like "Set x to SomeFunctionThatCanBlowUp()", the semantics
> should clearly be that the error comes from the function. ?In a simple
> addition statement, that makes no sense.

For example:

  Set z to catch(somefunctionthatmightblowup(...)).
  If catch(set x to y+z.) < 0.1 then go to tinyanswer.

Or something like that.  Or if you change the + to a / and z is 0.0,
for example, then it could cause a divide-by-zero exception.  There is
no guarantee that the + won't cause an exception, given that there is
no guarantee that y and z are both numeric.

> However, I think overloading your catch error types to include objects
> (or integral values, I guess, your example below isn't clear) along
> with real values (ignoring the bit above about whether floating-point
> assignment could throw an error) makes things confusing.

Catch doesn't return just error types or numbers, it can return any
object returned by the statements that are being caught; catch doesn't
care what type they are.  For example:

  Writeline catch(set x to "hello world".).

will write "hello world".

>?It's nice
> that "catch(stuff)" indicates that there's one or more statements
> inside, but so does indentation in Python, bracketing in C/C++,
> Begin/End in <insert language here>, and so forth, ...

Except that in those languages, I don't think that the indentation,
bracketing, Begin/End, etc, can be used in expressions.  Catch can.
For example, catch will return the final value of z:

If catch(Set x to y+z. Set y to x+z.  Set z to 1/(x+y).) < 0.1 then go
to tinyanswer.

>?Beyond that,
> I think you would want a good mechanism for comparing ranges of values
> if you want to make exceptions/errors real-valued.

I am thinking that exceptions/errors should have any kinds of values
the programmer wants to give them.  Some people prefer error numbers,
some prefer error messages, some prefer error identifiers, etc.  I am
thinking that the Error function should simply take a list of whatever
objects the user wants to throw, and throw them.  For example, if the
programmer wanted an error number and an error message for a
particular error:

  If x < 10 then throw error(10, "Please enter a number >= 10").

They could then do something like:

  Set result to catch(funtionthatcouldblowup(...)).
  If result is an error then if result(1) = 10 then writeline
result(2).

Thank you for your comments, they are helping me to clarify my own
thinking on error handling in general and on catch in particular.


From univbgp100 at gmail.com  Mon May 19 00:06:37 2008
From: univbgp100 at gmail.com (univbgp100 at gmail.com)
Date: Sun, 18 May 2008 21:06:37 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP
Message-ID: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>

##FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP

FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP visit ebooks.univdatabase.com


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri May  9 07:07:01 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 May 2008 13:07:01 +0200
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
	<Xns9A9976D7CDC64duncanbooth@127.0.0.1>
	<e3e88105-2532-42ef-86c1-8bd45b63b488@m36g2000hse.googlegroups.com>
Message-ID: <68ipilF2t85d3U1@mid.individual.net>

dmitrey wrote:

> Hmm... I thought this issue is available from Python2.5 only. I
> have no other interpreters in my recently installed KUBUNTU 8.04.

"aptitude install python2.4" helps.

Regards,


Bj?rn

-- 
BOFH excuse #10:

hardware stress fractures



From rossgk at gmail.com  Fri May 16 09:17:42 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 16 May 2008 06:17:42 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
References: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>
	<a69110e5-e622-4963-9816-2cc6730090e5@m44g2000hsc.googlegroups.com>
Message-ID: <5d955543-eaf9-4b75-8ad6-1fcf2d4ac430@e53g2000hsa.googlegroups.com>

On May 15, 5:26 pm, s0s... at gmail.com wrote:
> On May 15, 3:12 pm, RossGK <ros... at gmail.com> wrote:
>
> > Just getting used to the PyDev environment in eclipse by playing with
> > a few simple programs. I'm also using wxPython GUI stuff.
>
> >  I've noticed though that simple print commands in my code cause a
> > "wxPython:stdout/stderr" popup window to display any print's I might
> > be dumping out, rather than going to the console in Eclipse.
>
> > Any suggestions of why this is?   Another code example I was looking
> > at (which does not include any wx GUI stuff) has print commands whose
> > result ends up in the Eclipse console, just to further confuse me.
>
> > Is this something that wxPython is imposing on the environment?
>
> Yes, it's wxPython, it does that by default. Pass the keyword argument
> "redirect" set to False to your wx.App object constructor:
>
> app = wx.App(redirect=False)
>
> Or to whatever class you derived from wx.App:
>
> app = ClassDerivingFromWxApp(redirect=False)

Thank you!  That was very helpful, and works fine.

-Ross.


From saluk64007 at gmail.com  Sun May 25 13:17:41 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 10:17:41 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <c3f69bf60805251017r3caede8eld8a61084eb6b2759@mail.gmail.com>

Hi Erik,

As far as I know the only full web framework that works with a primarily
inline style is spyce, which is not currently under active development.  I
used it for a while and it was the first python framework I used.  I think
it's pretty good, if a little bit of an underdog.

That said, using a controller based framework it would be pretty easy to
emulate what you are wanting.  Find a templating language that fits what you
want, build the controller to map to the directories, and pass into
templates all the objects that are needed to interact (response/request
objects etc) and you're set.
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From vivainio at gmail.com  Mon May 26 05:25:53 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Mon, 26 May 2008 02:25:53 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>

On May 26, 7:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:

> I may be full of beans here, but I would like to make a suggestion.
> Why not add a keyword such as "private," and let it be the equivalent
> of "protected" in C++? That would make member variables and functions

Better yet, have '@@foo' be translated to self.__foo. It would cut
some whining about 'self' as well, which would probably make it a more
worthwhile change (private attributes is a feature I don't really care
about much).

Obviously nobody should hold their breath and wait for this to happen.
This is a problem that needs to be solved on API doc generation / IDE
autocompleter layer. If everybody agreed on how to tag published vs.
private methods in docstrings or wherever, we would be mostly set.


From kamhung.soh at gmail.com  Thu May  8 22:09:14 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 09 May 2008 12:09:14 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
Message-ID: <op.uau6xpl7ev04yd@melwxp23>

On Fri, 09 May 2008 09:52:53 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> I got it!  Thanks for all your help!!!  Please tell me what you think:
>
> def anafind():
>             fin = open('short.txt')			#one word per line
>             mapdic = {}					#this dic maps letters to anagrams
>             for line in fin:
>                         line = line.strip()
>                         templist = sorted(list(line))	#sort letters
>                         newtlist = (''.join(templist)) 	#join letters
>                         if newtlist not in mapdic:
>                                     mapdic[newtlist] = [line]
>                         if line not in mapdic[newtlist]:
>                                     mapdic[newtlist].append(line)
>             for value in mapdic.values():
>                         if len(value) <= 1:
>                                     pass
>                         else:
>                                     print value
>
>

I avoid creating a temporary variable if it's only used once immediately,  
so I would have written:

newtlist = ''.join(sorted(list(line)))

Looks pretty good, and I found the other tips in parallel responses useful  
to me too!

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From nick at craig-wood.com  Fri May 16 09:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 16 May 2008 08:30:05 -0500
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
Message-ID: <slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>

Laszlo Nagy <gandalf at shopzeus.com> wrote:
>  I'm trying to write a multi threaded TPC server. I have used xmlrpc 
>  before for many purposes, but in this case this would not be efficient:
> 
>  - I have to send larger amounts of data, the overhead of converting to 
>  XML and parsing XML back would be too much pain
>  - I have no clue how to do keep-alive with simplexmlrpcserver and it is 
>  slow to open a new connection for each RPC
>  - I would like to do session management (authentication, then store 
>  session info on server site) which is also hard with xmlrpc.
> 
>  I have looked at various solutions including:
> 
>  - PyOrbit - too heavy weight
>  - Pyro - uses pickle, I do not trust it

It is possible to change the serialization used by Pyro

  http://pyro.sourceforge.net/manual/9-security.html#pickle

to the the 'gnosis' XML Pickler.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gagsl-py2 at yahoo.com.ar  Thu May 15 03:56:16 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 04:56:16 -0300
Subject: Custom Classes?
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
	<4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>
Message-ID: <op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 15:10:21 -0300, Victor Subervi  
<victorsubervi at gmail.com> escribi?:

> I remember why I had the number with the getpic. It is because I display
> several of these images on a single page, and apparently I cannot call  
> the
> same script and get more than one image from an HTML page.

That's not true. If you still have the example I posted a few weeks ago,  
you can use this script to show a full listing of all uploaded pictures.  
It's a small variation of album.py.
I think you were saving the pictures on disk - DON'T do that. It's  
unnecesary, wastes time and disk space, and if not done properly one  
request interferes with the other.

-- 
Gabriel Genellina
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From kccnospam at glenevin.com  Mon May 19 13:43:37 2008
From: kccnospam at glenevin.com (seanacais)
Date: Mon, 19 May 2008 10:43:37 -0700 (PDT)
Subject: Using StringVars in  List of Dictionaries as tkInter variables for 
	Scale and Label widgets
Message-ID: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>

I'm trying to build an unknown number of repeating gui elements
dynamically so I need to store the variables in a list of
dictionaries.  I understand that  Scale "variable" name needs to  be a
StringVar  but I cannot figure out how to initialize the dictionary.

I've tried the following code

ps = PowerSupply()		# Instantiate a Power Supply VM Object
numOPs = ps.getOnum()      # Find the number of outputs
OPValues = []			# Global list to hold one dictionary per output

for c in range(numOPs):
	OPValues.append({ })
	ps.initOPValues(c, OPValues[c])



ps.initOPValues is defined as follows:

	def initOPValues(self, OPname, dname):

		OPDefaults = {
			'Vval'  : 0,
			'Ival'  : 0,
			'Otemp' : 0
		}

		dname = dict((d,StringVar()) for d in OPDefaults)
		for d in OPDefaults:
				dname[d].set(OPDefaults[d])

I get the following error:

Traceback (most recent call last):
  File "C:\Code\gui\tkinter.py", line 165, in <module>
    ps.initOPValues(c, OPValues[c])
  File "C:\Code\gui\tkinter.py", line 47, i initOPValues
    dname = dict((d,StringVar()) for d in OPDefaults)
  File "C:\Code\gui\tkinter.py", line 47, in <genexpr>
    dname = dict((d,StringVar()) for d in OPDefaults)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
    Variable.__init__(self, master, value, name)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
Exception exceptions.AttributeError: "StringVar instance has no
attribute '_tk'"
 in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
0x00B7D468>> ignored

Any help is appreciated!

Thanks,

Kevin


From eric.hanchrow at gmail.com  Thu May  8 17:03:29 2008
From: eric.hanchrow at gmail.com (offby1)
Date: Thu, 8 May 2008 14:03:29 -0700 (PDT)
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
Message-ID: <88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>

Ah.  So from the point of view of mut.py, "thing" and "system.thing"
are separate, unrelated variables; the former of which is initialized
from the latter when mut says "from system import thing".   Thanks.


From bj_666 at gmx.net  Tue May 20 03:06:39 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 07:06:39 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <69fbjvF2uih6aU6@mid.uni-berlin.de>

On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:

> 2.  It is not clear to me how a python web application scales.

Ask YouTube.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From marco at sferacarta.com  Tue May 13 06:26:13 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 12:26:13 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <b1eWj.41730$o06.34888@tornado.fastwebnet.it>

wxPythoner at gmail.com wrote:

> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings.

I'm glad for you. Did you really write checks like "if foo is 27" ?

The point is, you have to learn technologies to use them. It's not like 
technologies learn you (not even in soviet Russia)

> How is with this issue in Python 3.0? Is it fixed?

There is nothing to fix.

> Does Python handle this things properly now?

It always did.


From carsten.haese at gmail.com  Wed May  7 10:30:46 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Wed, 07 May 2008 10:30:46 -0400
Subject: comparing dictionaries
In-Reply-To: <fvsd4o$r6f$1@solaris.cc.vt.edu>
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <q2jUj.2758$J16.426@newssvr23.news.prodigy.net>

brad wrote:
> I want to compare two dicts that should have identical info just in a 
> different data structure. The first dict's contents look like this. It 
> is authoritative... I know for sure it has the correct key value pairs:
> 
> {'001' : '01'}
> 
> The second dict's contents are like this with a tuple instead of a 
> string for the key:
> 
> {('This is one', '001'): '01'}

It looks like extracting key[1] from each key of the second dictionary 
should yield the keys of the first dictionary. If that is the case, then 
the following should do it:

d1 = {'001':'01', '002':'02'}
d2 = {('This is one', '001'): '01', ('This is two', '002'): '02'}

if d1 == dict( zip( (k[1] for k in d2.keys()), d2.values() ) ):
     print "They're 'equal'."

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From fred.sells at adventistcare.org  Thu May 29 14:01:41 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Thu, 29 May 2008 14:01:41 -0400
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <6a7t05F368pqmU1@mid.uni-berlin.de>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0933@acesxch01.ADVENTISTCORP.NET>

Diez wrote: 
> Why don't you create KID-template like this:
> 
> <div py:strip="True">${root}</div>
> 
> and in the controller say
> 
> @expose("thexmltemplate")
> def ...
>    return dict(root=myElementTreeRoot)
> 
sounds good.  Does that "py:strip" remove the <div> and anything outside it.  I'll be doing a flex style ajax call and it wants just the xml data tree.



From inhahe at gmail.com  Thu May 22 12:40:40 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:40:40 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <olhZj.61432$3v1.5746@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
>
> "inhahe" <inhahe at gmail.com> wrote in message news:...
>> >Ma: Symbolic identity is a mathematical relation
>>>Mb: Symbols are acausal
>>>m: Matter is causal
>>>C: Symbolic identity is not defined on matter.
>>
>
> I do think though that a computer languages claiming operations on 
> 'identity', as vis a vis 'equivalence', is completely contrived, as in, 
> it's just an arbitary distinction about the way in which we're going to 
> compare bits.
>
>

Although I suppose it counts for something that if a is b, in Python, then 
the data referenced (at the end of the chain) by those two names occupies 
the same physical transistors in the RAM module, although that's still a 
level removed in that the so-called identity would change with time as the 
electrical condition in the transistors changes.

But as far as the transistors being physically the same goes, a is b 
actually closely corresponds to vernacular identity by way of "reference vs. 
referent" in the theory of linguistics.





From benjamin.kaplan at case.edu  Fri May 30 09:01:11 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 30 May 2008 09:01:11 -0400
Subject: how can i stop script from running on login ?
In-Reply-To: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
References: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
Message-ID: <ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>

On Fri, May 30, 2008 at 8:44 AM, abhilash pp
<afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
wrote:

> Hi all,
>
> One of my friends played some tricky thing, and now I am in great trouble,
> please help
> Here is the scenario  [windows xp ]:
>
> He wrote one login script and put it on the start program folder under 'All
> Users'
> The script is like this it will issue a log off command when we login; due
> to this I am not able to login to my system even he himself not able to
> access the system and solve the problem. The main thing is the script is of
> '.pyw' type so I can't able to close the CMD window to stop this script
>
> How can I remove that script? Any help will be appreciated, thanks in
> advance
>
> Abhilash
>
>
Try running the machine in safe mode, then delete the script.
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From chris.hulan at gmail.com  Fri May  9 08:38:41 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Fri, 9 May 2008 05:38:41 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <a8fa9609-9ff7-4ee6-82f3-9e8a7c8e1bfa@24g2000hsh.googlegroups.com>

On May 9, 8:25 am, Viktor <alefn... at gmail.com> wrote:
> Can somebody give me an explanation what happened here (or point me to
> some docs)?
>
> Code:
>
> HMMM = None
>
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)
>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
>
> class A:
>     @w
>     def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)
>
> Output:
>
> fn: 10404208
> HMMM: 10404208
> wrapper: 10404272
> A.__init__: 10376136
> A.__init__.i: 10404208
> HMMM: 505264624
>
> Why did HMMM changed his id?!

The HMMM inside w is local to that function and is not the same HMMM
that is defined just before w.
Have a look at http://docs.python.org/ref/global.html

cheers


From Magnus.Moraberg at gmail.com  Tue May 27 06:01:30 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 03:01:30 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
Message-ID: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>

Hi,

I wish to extract all the words on a set of webpages and store them in
a large dictionary. I then wish to procuce a list with the most common
words for the language under consideration. So, my code below reads
the page -

http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm

a welsh language page. I hope to then establish the 1000 most commonly
used words in Welsh. The problem I'm having is that
soup.findAll(text=True) is returning the likes of -

u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
www.w3.org/TR/REC-html40/loose.dtd"'

and -

<a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"

Any suggestions how I might overcome this problem?

Thanks,

Barry.


Here's my code -

import urllib
import urllib2
from BeautifulSoup import BeautifulSoup

# proxy_support = urllib2.ProxyHandler({"http":"http://
999.999.999.999:8080"})
# opener = urllib2.build_opener(proxy_support)
# urllib2.install_opener(opener)

page = urllib2.urlopen('http://news.bbc.co.uk/welsh/hi/newsid_7420000/
newsid_7420900/7420967.stm')
soup = BeautifulSoup(page)

pageText = soup.findAll(text=True)
print pageText



From deets at nospam.web.de  Sun May 18 11:35:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 17:35:32 +0200
Subject: Get all the instances of one class
In-Reply-To: <24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
Message-ID: <69b0mlF31f0kbU1@mid.uni-berlin.de>

Terry schrieb:
> On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
>> escribi?:
>>
>>> Is there a simple way to get all the instances of one class? I mean
>>> without any additional change to the class.
>> Try with gc.get_referrers()
>>
>> py> import gc
>> py> class A(object): pass
>> ...
>> py> a,b,c = A(),A(),A()
>> py> A
>> <class __main__.A at 0x00A3F4E0>
>> py> for item in gc.get_referrers(A): print type(item)
>> ...
>> <type 'getset_descriptor'>
>> <type 'getset_descriptor'>
>> <type 'tuple'>
>> <class '__main__.A'>
>> <class '__main__.A'>
>> <class '__main__.A'>
>> <type 'dict'>
>> <type 'dict'>
>>
>> We need to filter that list, keeping only A's instances:
>>
>> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
>> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
>> <__main__.A object at 0x00A40E18>]
>>
>> --
>> Gabriel Genellina
> 
> But I saw in the help that we should "Avoid using get_referrers() for
> any purpose other than debugging. "

Yes, because using it do is very resource-consuming and shouldn't be 
done. Why don't you tell us what you are after here & then we might come 
up with a better solution?

Diez


From notbob at nothome.com  Mon May 12 13:56:10 2008
From: notbob at nothome.com (notbob)
Date: Mon, 12 May 2008 17:56:10 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <_w%Vj.9941$Qw5.889@fe107.usenetserver.com>

On 2008-05-12, John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.

> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off,

You're contradicting yourself.  Which is it?  You can or can't use it?  

I suspect the more you learn of it, the more you will be able to do with it.  I
hope so, as I'm just doing it now, like you, for the sake of learning.  

nb


From bbxx789_05ss at yahoo.com  Fri May  2 04:34:54 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 2 May 2008 01:34:54 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <a9e90fad-ac75-4025-8eb5-cdfa0c644698@a70g2000hsh.googlegroups.com>

On May 1, 3:25?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> I have been to the main python site, but am still confused. ?I have
> been using .net, so it may be obvious how to do this to everyone
> else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these. ?If I
> have mod_python or fastcgi on apache, where do I start? ?I don't have
> clue where to begin to create a web page from scratch in python. ?I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.
>
> Thank you for any help.

Directions for a simple CGI script:

1) Start apache.

2) Use a text editor to create a webpage with a link:

<html>
<head>
<title>Python CGI Test</title>
</head>

<body>
<div>
<a href="http://localhost/cgi-bin/first.py">click me</a>
</div>
</body>

</html>

Save that file with a .htm extension anywhere on your computer, e.g.
name the file test.htm and save it in C:\My Documents.


3) The value of the link's href attribute is a special url.  The url
starts with "http://localhost", or it may need to start with something
like http://localhost:8080" depending on what port number you
installed Apache on.  If you used the default port when you installed
Apache, then the first part of the url will be "http:/localhost".

The rest of the url is the relative path to your cgi script.  The path
is relative to your Apache2 folder.  For instance, my directory
structure looks like this:

Apache2
----htdocs
----cgi-bin
--------first.py
----etc.

So the relative path to my cgi script is "/cgi-bin/first.py".

4) Create a cgi script:

#!/usr/bin/env python

#For Windows, instead of the above line use
#something like: #!C:\Python25\python.exe
#instead.  The path after "#!" should be the
#path to wherever python.exe is on your computer.

import cgitb; cgitb.enable()

#The above line will cause error messages to
#be sent to your browser, which is helpful for
#debugging.  Otherwise, your browser will just
#show a blank page when there is an error in your
#script

print "Content-type: text/html"
print
print "<h1>Hello World</h1>"


The first print statement is the minimum header you need when
responding to a web page.  After you print all the headers you desire,
then you need to print a blank line.  After the blank line, you print
the html that you want the browser to display.


5) On Unix: you have to set the file permissions for your cgi script.
Everyone must be able to read and execute your cgi script:

$ chmod 755 first.py


6) Start your web browser, and click on File>Open and navigate to
your .htm file.  When your html page opens in your browser, click on
the link.  The link will call your python cgi script, the cgi script
will respond my sending some html to your browser, then your browser
will display the html.




From gagsl-py2 at yahoo.com.ar  Thu May  1 05:10:23 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 06:10:23 -0300
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
Message-ID: <op.uagw3l0xx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 04:35:17 -0300, n00m <n00m at narod.ru> escribi?:

> from random import randint
>
> s1 = ''
> s2 = ''
>
> for i in xrange(1000):
>     s1 += chr(randint(97,122))
>     s2 += chr(randint(97,122))
>
> print s1[:25]
> print s2[:25]
>
> import difflib
>
> s = difflib.SequenceMatcher(None, s1, s2)
>
> print s.find_longest_match(0, len(s1), 0, len(s2))
>
>
>
>>>> ============== RESTART ====================
>>>>
> yymgzldocfaafcborxbpqyade
> urvwtnkwfmcduybjqmrleflqx
> (0, 0, 0)
>>>>
>
> I think it's line #314 in difflib "who's to blame" --

Me too. Could you think of some alternative? Simply disabling that  
"popularity check" would slow down the algorithm, according to the  
comments.

-- 
Gabriel Genellina



From gandalf at shopzeus.com  Fri May 16 06:16:13 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 12:16:13 +0200
Subject: TPCServer and xdrlib
Message-ID: <482D5EED.6040900@shopzeus.com>


  Hi All,

I'm trying to write a multi threaded TPC server. I have used xmlrpc 
before for many purposes, but in this case this would not be efficient:

- I have to send larger amounts of data, the overhead of converting to 
XML and parsing XML back would be too much pain
- I have no clue how to do keep-alive with simplexmlrpcserver and it is 
slow to open a new connection for each RPC
- I would like to do session management (authentication, then store 
session info on server site) which is also hard with xmlrpc.

I have looked at various solutions including:

- PyOrbit - too heavy weight
- Pyro - uses pickle, I do not trust it

BTW I do not care about the clients - they must trust the server side. 
In contrast, the server should not receive anything from the clients 
that is dangerous. I would like to use something that is fast, and can 
only transfer data, not code. For this reason I think I cannot use the 
marshal module because it is able to marshal code objects. I think I'm 
going to implement my own "pickler" over xdrlib, that will only 
pack/unpack data, NOT code. (It would also have the advantage that 
others could write clients in different languages.)

Before I start re-inventing the wheel:

- Is there another (already existing) higher level framework that I can 
try? It should be safe and fast, that is the only restriction.
- Do you think that it is a good idea to use xdrlib? I haven't seen 
projects using it directly. For me it is like the rotor module was - it 
was there but almost nobody used it. There might be a better lower level 
library which I don't know of.

Thank you,

   Laszlo



From subhabrata.iisc at hotmail.com  Tue May 27 10:25:28 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Tue, 27 May 2008 07:25:28 -0700 (PDT)
Subject: Creating a web page with Python
Message-ID: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>

Dear Members of the group,
If any one can help me with an idea how to create a web page with
python? Do I have to use vbscript or something like that? I also want
to embed the function in the button of a form. How can I do it in
Python?
Regards,
Subhabrata Banerjee.


From sn at sncs.se  Tue May 27 12:18:28 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 09:18:28 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com> 
	<mailman.1654.1211903729.12834.python-list@python.org>
Message-ID: <a0ba86f9-b1e7-47de-9875-9bd436a21a1d@e39g2000hsf.googlegroups.com>

I am probably bad too, I just don't think there is a good rationale.
That's the issue.

Now I 'have' to leave but keep up the conversation if you like.
Looking forward to see your comments.

S.


On May 27, 5:55 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > I dont want to be a new Guido. Somebody else please.
>
>     Please, explain why should we fork Python? Because Python 3.0 will
> have 'print' as a function, not as a statement, am I right? Or maybe
> the reason is a major breakage of C API in Python 3.0, so that
> Guppy-PE/Heapy will both need a complete re-write? There is a
> rationale for these changes and you've been told about it several
> times, but you don't care much to listen.
>     Well, anyway, nobody stops you from forking a project called
> 'Python'. Python is free software, as you know.
>
>
>
> > S.
>
> > On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> >> I was talking about Guido van Rossum
>
> >> The one who decides, so far when people agree
>
> >> But we can make a new fork
>
> >> He is the originator, but now it seems, for me, it is hanging out in
> >> the air
>
> >> So we need some new leadership
>
> >> From somebody, somebody like you perhaps. Or me.
>
> >> Sverker
>
> >> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> >> wrote:
>
> >> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> >> > > seems to be needed
>
> >> > > He doesn't seem to care much anyway now
>
> >> > > Or if he cares, he have many other assignments
>
> >> > Who are you talking about?
>
> >> > > So should we try to elect a new chairman?
>
> >> > Chairman? Elaborate please.
>
> >> > > I am probably not eligible. There must be many others.!
>
> >> > > Do you dare?consper
>
> >> > Hm, are you and castrionpi twin brothers or something?
>
> >> > > S.
> >> > > --
> >> > >http://mail.python.org/mailman/listinfo/python-list
>
> >> > --
> >> > Wbr, Andrii Mishkovskyi.
>
> >> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.



From michele.simionato at gmail.com  Fri May 23 04:29:33 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 23 May 2008 01:29:33 -0700 (PDT)
Subject: pickle error: can't pickle instancemethod objects
References: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>
	<g15u8f$t0f$03$2@news.t-online.com>
Message-ID: <7013ab0c-96b7-4152-90f5-0fc515acdb02@i76g2000hsf.googlegroups.com>

On May 23, 10:12?am, Peter Otten <__pete... at web.de> wrote:
> Michele Simionato wrote:
> > Can somebody explain what's happening with the following script?
> > ? ? def __gestate__(self): # should skip the bound methods attributes
>
> Must be __getstate__ ;)
>
> Peter

Aaargh!!! I spent a couple of hours on a typo!
Thanks anyway, now everything makes sense again ;)


From mail at timgolden.me.uk  Fri May 16 10:07:31 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 15:07:31 +0100
Subject: Problem creating a shorcut
In-Reply-To: <Xns9AA09442779A0duncanbooth@127.0.0.1>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>	<c550g5-l5f.ln1@darkstargames.dnsalias.net>	<mailman.1218.1210936257.12834.python-list@python.org>
	<Xns9AA09442779A0duncanbooth@127.0.0.1>
Message-ID: <482D9523.8030206@timgolden.me.uk>

Duncan Booth wrote:
> It's not too hard to get the required command line from the registry:
> 
> import _winreg
> print _winreg.QueryValue(_winreg.HKEY_CLASSES_ROOT,
>     'FirefoxURL\shell\open\command')
> 
> and of course it throws an exception if firefox isn't installed.
> 
> Then just replace %1 with the url to get the actual command you need.

That's neat. You learn something new...

TJG


From notbob at nothome.com  Sat May 10 12:19:19 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 16:19:19 GMT
Subject: Now what!?
Message-ID: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>

Grrr....

I'm following A Byte of Python and into the while loops chap.  I cp/paste
while.py to a file and give 777 perms.  I mv while.py to while and run it (./while)
as a standalone script.  I get errors.

Here is the script:

while.py

http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html


When I run it as.....

$ python while

.....it works perfect.  But, if I run it simply as.....

$ ./while

.....I get this:

$ ./while
number: illegal number: =
./while: line 6: running: command not found
./while: line 9: syntax error near unexpected token ('
./while: line 9:         guess = int(raw_input('Enter an integer : '))'

Why does it work one way and not the other.  If I run the simple hello world
script the same way ($ ./helloworld) and it works fine.  Same shebang, same
dir, same permission, etc.  I even meticulously indented everything
perfectly by hand.  What am I missing?

BTW, anyone know a better cli news client/editor combo than slrn/jed (don't
even think vi!)?  When I cp/past code (or most anything else) to jed, all
the lines become stair-stepped.  This is no biggie for a most stuff, but for
idented code, it's unacceptable.  

nb



From vginer at gmail.com  Mon May 19 14:07:06 2008
From: vginer at gmail.com (Vicent Giner)
Date: Mon, 19 May 2008 11:07:06 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
Message-ID: <ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>

On May 19, 6:11 pm, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 19, 7:03 am, Bruno Desthuilliers <bruno.
>

>  I'm pretty sure about that: when the algorithms take 4 hours to test
> a single execution, you value processor time.


Yes, of course, but that should mean that I have to do it better, in
the programming step (I would have to re-program or re-implement my
algorithm). And I think the problem would be the same in any other
language, wouldn't it?


>  The situation would be simpler if there were good well-known toolkits
> for optimization in python (like numpy for matrix operations), but
> that's not the case.

Are there such toolkits in other languages? I am not sure they exist
in C, for example.

By the way, is it possible (and easy) to call a C function from a
Python program??





From larry.bates at websafe.com`  Tue May 13 08:56:08 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 07:56:08 -0500
Subject: downloading a link with javascript in it..
In-Reply-To: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <fqednZbSpdEdErTVnZ2dnUVZ_oPinZ2d@comcast.com>

Jetus wrote:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
> 
> So, in summary, when I download this page, for each record, I would
> like to initiate the "view" link.
> Can anyone point me in the right direction?
> 
> When the "view" link is clicked on in IE or Firefox, it returns a pdf
> file, so I should be able to download it with
> urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
> 
> Here is the following code I have been using
> ----------------------------------------------------------------
>     import urllib, urllib2
> 
>     params = [
>                 ('booktype', 'L'),
>                 ('book', '930'),
>                 ('page', ''),
>                 ('hidPageName', 'S3Search'),
>                 ('DoItButton', 'Search'),]
> 
>     data = urllib.urlencode(params)
> 
>     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> S3DataLKUP.jsp", data)
> 
>     s = f.read()
>     f.close()
>     open('jcolib.html','w').write(s)
> 

You may want to take a look at mechanize, I'm having pretty good luck with using 
it to do the types of things you describe.


http://wwwsearch.sourceforge.net/mechanize/

-Larry


From exarkun at divmod.com  Mon May 12 11:25:48 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 11:25:48 -0400
Subject: buffering choking sys.stdin.readlines() ?
In-Reply-To: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
Message-ID: <20080512152548.6859.259250669.divmod.quotient.62510@ohm>

On Mon, 12 May 2008 08:05:39 -0700 (PDT), cshirky <cshirky at gmail.com> wrote:
>Newbie question:
>
>I'm trying to turn a large XML file (~7G compressed) into a YAML file,
>and my program seems to be buffering the input.
>
>IOtest.py is just
>
>  import sys
>  for line in sys.stdin.readlines():
>    print line
>
>but when I run
>
>$ gzcat bigXMLfile.gz | IOtest.py
>
>but it hangs then dies.

file.readlines reads the entire file into a list in memory.  You may not
want to do this.  You could try, instead, iterating over "sys.stdin",
which should not try to load the entire file into memory.

Jean-Paul


From afrobeard at gmail.com  Thu May 15 19:47:58 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:47:58 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>
Message-ID: <8e4f775d-1d68-4c77-8644-b2298e92a6d8@m45g2000hsb.googlegroups.com>

According to http://en.wikipedia.org/wiki/Expression_(programming)

"An expression in a programming language is a combination of values,
variables, operators, and functions that are interpreted (evaluated)
according to the particular rules of precedence and of association for
a particular programming language, which computes and then produces
(returns, in a stateful environment) another value."

l.__delslice__(0,len(l)) is an expression because it returns None
[which also happens to be a value] in this case.

On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following proposed solution is not intended to be a solution, it
> > goes completely against the zen of python. [Type import this into the
> > python command interpreter]
>
> > I brought it down to two lines:-
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > itertools would still be a better approach in my opinion.
>
> > Just because I'm curious to know, can anyone bring it shorter[even if
> > its cryptic] than this without invoking any Python Library.
>
> > P.S. Once again I would not recommend using this as Explicit is better
> > than Implicit
> > P.P.S. It is strongly undesirable for us humans to use anything
> > starting with __ :)
>
> > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > | It seems that I rather frequently need a list or iterator of the form
> > > > | [x for x in <> while <>]
>
> > > > I can think of two ways to interpret that.
> > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > >> the expression <B> is false.
>
> > > def gen(a):
> > > ? ? for x in a:
> > > ? ? ? ? if B: break
> > > ? ? ? ? yield x
>
> > > a_gen = gen(A)
>
> > > # now iterate over a_gen
>
> > > --
> > > Geoff- Hide quoted text -
>
> > - Show quoted text -
>
> In your original, you have:
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> You may be hyperextending the use of '..if..else..', which is one of
> my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> an expression.



From bthate at gmail.com  Sun May 18 05:11:11 2008
From: bthate at gmail.com (Bart Thate)
Date: Sun, 18 May 2008 02:11:11 -0700 (PDT)
Subject: GOZERBOT 0.8.1-BETA released
Message-ID: <ae5cc428-2451-41c5-b7f9-12fd706726c2@e39g2000hsf.googlegroups.com>


working to a new 0.8.1 release we make a BETA available to be tested
by interested users.

new features:

    * ssl connections are now supported
    * third party software included into gozerbot:
          o feedparser (used by RSS) .. makes atom feeds possible
          o simplejson (used by COLLECTIVE)
          o BeautifulSoup (used to parse webpages)
    * renewed RSS plugin
    * renewed collective plugin
    * renewed webserver plugin .. new webserver API
    * tcp.py notification plugin as well as a totcp.py client program

if you are using one of these features please test this BETA.

the BETA can be downloaded from http://gozerbot.org and problems with
it can be reported on http://dev.gozerbot.org or email me at
bthate at gmail.com

about gozerbot:

Requirements

    * a shell
    * python 2.4 or higher
    * if you want to remotely install plugins: the gnupg module
    * if you want mysql support: the py-MySQLdb module
    * if you want jabber support: the xmpppy module

Why gozerbot?

    * provide both IRC and Jabber support
    * user management by userhost .. bot will not respond if it
doesn't know you (see /docs/USER/)
    * fleet .. use more than one bot in a program (list of bots) (see /
docs/FLEET/)
    * use the bot through dcc chat
    * fetch rss feeds (see /docs/RSS/)
    * remember items
    * relaying between bots (see /docs/RELAY/)
    * program your own plugins (see /docs/PROGRAMPLUGIN/)
    * run the builtin webserver (see /docs/WEBSERVER/)
    * query other bots webserver via irc (see /docs/COLLECTIVE/)
    * serve as a udp <-> irc or jabber gateway (see /docs/UDP)
    * mysql and sqlite support

the gozerbot development team


From tjreedy at udel.edu  Wed May 14 23:54:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 23:54:55 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com><Xns9A9EA1FF16358duncanbooth@127.0.0.1><mailman.1124.1210784308.12834.python-list@python.org>
	<20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>
Message-ID: <g0gc6b$sbn$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:20080514220126.e13d7cf1.johnjsal at NOSPAMgmail.com...
| On Wed, 14 May 2008 12:58:12 -0400
| "Terry Reedy" <tjreedy at udel.edu> wrote:
|
| > gmane.comp.python.general
| >
| > which is where I am answering this from.  Works great.
|
| So that's the same as c.l.p.?

It is the same as python-list, which happens to be the same as c.l.p..
Gmane mirrors technical mailing lists, including over 200 under g.c.python.





From basti.wiesner at gmx.net  Sat May 24 15:46:49 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 24 May 2008 21:46:49 +0200
Subject: Python, Daemons and D-Bus
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
Message-ID: <g19rcb$pjt$02$1@news.t-online.com>

[ PurpleServerMonkey <PurpleServerMonkey at gmail.com> ]

> Would you use D-Bus or a more traditional IPC method such as sockets?
> Although D-Bus is relatively new it looks interesting, just not sure
> it would work well in this kind of project.

DBus is not really intended for private communication between processes of
the same application, but more for intercommunication between different
applications.  If the IPC interface of your backend daemons is intended to
be used by other applications, DBus is the right choice, otherwise I would
choose something different.

The reason is, that DBus doesn't know about applications.  It exposes all
objects registered on the bus to every DBus client on the system and so
makes you application-private API available to the public (and spams the
bus with lots of generally useless objects ;) ).

In case your IPC interface is application private, a custom IPC protocol
(probably using XML RPC over unix sockets) is better suited.

Moreover you should make your choice dependent on the type of data you
transmit.  Both DBus and XML-RPC wrap calls into XML messages, which is
terribly inefficient for large binary data.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Wed May 21 09:34:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 15:34:56 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <69imp0F33sdj6U1@mid.uni-berlin.de>

boblatest at googlemail.com wrote:

> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> 
>> Although that solution is pretty, it is not the canonical solution
>> because it doesn't cover the important case of "if" bodies needing to
>> access common variables in the enclosing scope.  (This will be easier
>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> IMHO closer to a canonical solution to this FAQ.
> 
> Hello everybody,
> 
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.

Well, it's a design-decision - and I'm pretty ok with it being a bit verbose
here - as it prevents a *great* deal of programming errors that would
otherwise happen from accidentally writing a = b where a == b was meant.

One could argue that regular expressions - which seem to be THE case where
it bugs people - should offer a standard way that essentially works as my
solution - by keeping state around, making series of tests easier.


Diez


From inhahe at gmail.com  Thu May 22 12:27:24 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:27:24 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <X8hZj.61426$3v1.31552@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
> >Ma: Symbolic identity is a mathematical relation
>>Mb: Symbols are acausal
>>m: Matter is causal
>>C: Symbolic identity is not defined on matter.
>

I do think though that a computer languages claiming operations on 
'identity', as vis a vis 'equivalence', is completely contrived, as in, it's 
just an arbitary distinction about the way in which we're going to compare 
bits.




From usenet at solar-empire.de  Sun May  4 11:24:54 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Sun, 4 May 2008 17:24:54 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
Message-ID: <6311f5-ppe.ln1@pluto.solar-empire.de>

Alexander Schmolck <a.schmolck at gmail.com> wrote:
> Gary Herron <gherron at islandtraining.com> writes:
> 
>> But... It's not!  
>>
>> A simple test shows that.   I've attached a tiny test program that
>> shows this extremely clearly.  Please run it and watch it fail.
> 
> In [7]: run ~/tmp/t.py
> final count: 2000000
>   should be: 2000000
> 
> (I took the liberty to correct your test to actually do what I said, namely
> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> numpy.array(0)``).

I did the same change. Here are the results of four runs:

final count: 1999980
  should be: 2000000

final count: 1999996
  should be: 2000000

final count: 1999123
  should be: 2000000

final count: 1999978
  should be: 2000000

This is on a AMD64 X2 using Python 2.5.2 and numpy 1.0.4.

Marc


From bignose+hates-spam at benfinney.id.au  Mon May 12 02:27:46 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 16:27:46 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
Message-ID: <87d4ns6nq5.fsf@benfinney.id.au>

Yves Dorfsman <yves at zioup.com> writes:

> Paul Rubin wrote:
> > Yves Dorfsman <yves at zioup.com> writes:
> >> import time
> >> y, None, d, None, None, None, None = time.localtime()
> >>
> >> I know you can't assign anything to None, but I'm sure you get what I
> >> mean, a special keyword that means I don't care about this value.
> >
> > You can just use a variable name than you ignore.  It's traditional to
> > use _ but it's not a special keyword, it's just a another variable name:
> >
> >    y, _, d, _, _, _, _, _, _ = time.localtime()
> 
> But you still have have a variable that's using memory for nothing.

No, you have one extra unused name binding. The values that you don't
want to use have *already* been allocated by the time the above
statement is executed. Name binding doesn't copy the values, it merely
binds a name to them. There's no "variable" in the above statement.

-- 
 \                       ?Holy human pressure cookers, Batman!? ?Robin |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From duncan.booth at invalid.invalid  Fri May 23 10:15:55 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 14:15:55 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
	<5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>
Message-ID: <Xns9AA79A81E3F08duncanbooth@127.0.0.1>

Michael Fesser <netizen at gmx.de> wrote:

> .oO(Duncan Booth)
> 
>>On those rare occasions when I've helped someone who wanted advice
>>I've found that my Python oriented viewpoint can be quite hard to
>>translate to PHP. For example I'd suggest 'oh you just encode that as
>>utf8' only to be told that there's no easy way to do that (have just
>>Google'd it looks like there is now a way to do that but with a big
>>red warning about it being EXPERIMENTAL and only use at your own
>>risk). 
>>
>>(Looking at the example given for unicode_encode it appears to depend
>>for its working on a global setting which isn't included in the
>>example. I may have misunderstood the example but if I read that
>>correctly its a good example of why PHP doesn't fit my brain.)
> 
> The only little problem is that PHP doesn't have native Unicode
> support yet, which will change with PHP 6. But of course you can still
> use UTF-8 without any trouble, I do it all the time. You just have to
> keep in mind that many string functions still work on bytes, not on
> characters, but this can almost always be solved with the Multibyte
> extension. Apart from that there's no problem with PHP and UTF-8. It's
> also easily possible to convert between various encodings using the
> iconv extension. 
> 
As I remember it the problem was that the data was stored in a database 
in latin-1 but the HTML page had to be in utf-8 (because the rest of the 
server and therefore all the page skins were already in utf-8). In 
python that would be a trivial conversion but I was told that in PHP it 
wasn't. 

Also it was PHP4 and as I understand it updating to a more recent 
version was non-trivial. Of course sometimes updating Python code to a 
newer version is also non-trivial: Zope in particular is very version 
specific but in most cases anything written in pure Python will be 
compatible with more recent versions.

But one small example isn't really the point. It's that the whole way 
Python works seems *to me* to make sense and (mostly) fits together 
cleanly and consistently. YMMV

-- 
Duncan Booth http://kupuguy.blogspot.com


From sln at netherlands.co  Sun May 25 20:30:16 2008
From: sln at netherlands.co (sln at netherlands.co)
Date: Sun, 25 May 2008 17:30:16 -0700
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <6t0k345vvochm8t3bsv7l1v38tq40j9oep@4ax.com>

Your opinion of yourself is only surpased by your monumental display
of mastery of the English language.

sln


On Sun, 25 May 2008 16:25:33 -0700 (PDT), "xahlee at gmail.com" <xahlee at gmail.com> wrote:

>For about the past 10 years, i have been concerned in the programing
>community's level of education in social issues.
>
>I have found that recently, a news that would be of interest to
>programers.
>
>There was a bet at longbets.org (run by Long Now Foundation) regarding
>the importance of blogs. The bet was made in 2002. The prediction has
>a resolution date in 2007.
>
>In 2008, the bet is resolved. See
>
>?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
> http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/
>
>I'd like encourage, for many of you, who have lots of opinions on
>technical issues or social issues surrounding software, to make use of
>longbets.org. It can help shape your thoughts from blog fart to
>something more refined. In any case, your money will benefit society.
>
>here's some examples you could try:
>
>? I bet that Java will be out of the top 10 programing languages by
>2020.
>
>? I bet that the top 10 programing languages in 2015 (as determined by
>requirement from job search engine), the majority will be those
>characterized as dynamic languages (e.g. php, perl, python,
>javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
>Haskell)).
>
>? You bet that Linux as a desktop system will or will not have a
>market share of such and such by the year xyz.
>
>(I'm not sure the above ?predictions? are candidates on longbets.org,
>since one of their rule is that the ?predictions? should be socially
>important. Looking at existing entries on their site, the social
>importance of the above items pale in comparison. (however, many of
>their existing ?predictions? are somewhat fringe))
>
>       *       *       *
>
>Note, in almost all online forums where tech geekers gather (e.g.
>newsgroups, slashdot, irc, etc), often they are anonymous, each fart
>ignorant cries and gripes and heated arguments, often in a
>irresponsible and carefree way.
>
>One of the longbets.org's goal is to foster RESPONSIBILITY.
>
>In recent years, i have often made claims that the Python's
>documentation, it's writing quality and its documentation quality in
>whole, is one of the worst.
>
>Among all the wild claims in our modern world, from the sciences to
>social or political issues, my claim about Python's technical writing
>quality or its whole quality as a technical documentation, is actualy
>trivial to verify by any standards. When presented to intellectuals of
>the world at large, the claim's verifiability is trivial, almost as a
>matter of fact checking (which are done by interns or newbie grads of
>communinication/journalism/literature majors, working for journalism
>houses). However, when i voiced my opinion on Python doc among
>programing geekers online, it is often met with a bunch of wild cries.
>Some of these beer drinking fuckheads are simply being a asshole,
>which are expected by the nature of online tech geeking communities (a
>significance percentage are bored young males). However, many others,
>many with many years of programing experience as a professional,
>sincerely tried to say something to the effect of ?in my opinion it's
>good?, or voice other stupid remarks to the effect of ?why don't you
>fix it?, and in fact find my claim, and its tone too fantastical, to
>the point thinking i'm a youngling who are bent on to do nothing but
>vandalism. (the tech geekers use in-group slang for this: ?troll?.)
>
>The case of the Python doc is just one example. I have also, in the
>past decade, in _appropriate_ online communties (e.g. newsgroups,
>mailing lists), voiced opinions on Perl's doc, emacs's doc, criticism
>on lisp nested syntax, ?software engineering? issues (e.g. OOP),
>various issues of jargons and naming (e.g. currying, lisp1 vs lisp2,
>tail recursion, closure), emacs's user interface issues, criticism on
>the phenomenon of Open Source community's fervor for bug reporting,
>criticism on IT industry celebrities such as Larry Wall and Guido von
>Rossum, opinions on cross-posting, ... and others. Some of my claims
>are indeed controversial by nature. By that i mean that there is no
>consensus on the subject among its experts, and the issue is complex,
>and has political implications. However, many trivially verifiable, or
>even simple facts, are wildly debated or raised a ruckus, because the
>programers are utterly ignorant of basic social knowledge, or due to
>their political banding (e.g. a language faction, Open Source) or
>current trends and fashions (e.g. OOP, Java, ?Patterns?, ?eXtreme
>Programing?, ... , OpenSource and ?Free? software movement, ...).
>
>I think, the founding of Long Now Foundation with its longbets.org,
>shares a concern i have on the tech geeking communities. In
>particular, tech geekers need to have a broader education on social
>sciences, needs to think in long term, and needs to foster personal
>responsibility, when they act or voice opinions on their love of
>technology. (note: not reading more motherfucking slashdot or
>motherfucking groklaw or more great podcasts on your beatific language
>or your postmodernistic fuckhead idols)
>
>(One thing you can do, is actually take a course on philosophy,
>history, law, economics, in your local community college.)
>
>Disclaimer: I have no affiliation with Long Now Foundation.
>
>       *       *       *
>
>See also:
>
>?Responsible Software Licensing? (2003-07) by Xah Lee
> http://xahlee.org/UnixResource_dir/writ/responsible_license.html
>
>?On Microsoft Hatred? (2002-02-23) Xah Lee
> http://xahlee.org/UnixResource_dir/writ/mshatred155.html
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/
>
>?



From nick at craig-wood.com  Fri May 23 06:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 05:30:09 -0500
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
	<f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>
Message-ID: <slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>

gianluca <geonomica at gmail.com> wrote:
>  On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > > exception like this:
> >
> > > Traceback (most recent call last):
> > >   File "<pyshell#18>", line 1, in <module>
> > >     myDLL.myFUNCT()
> > >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> > >     func = self.__getitem__(name)
> > >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> > >     func = self._FuncPtr((name_or_ordinal, self))
> > > AttributeError: function 'myFUNCT' not found
> >
> > Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> > chance you compiled your C as C++ and name mangling kicked in?
> >
> > Can you show a minimal C source for a DLL, how you compiled it, what you
> > did on the Python side to call it, and how it fails?
> >
> > Ciao,
> >         Marc 'BlackJack' Rintsch
> 
>  I've located my dll in c:\windows\system32 (in linux I aven't any
>  problem) and I compiled it with dev-c++. The source code is C standard
>  ANSII and is quite havy. If you like I can send it via mail (you can
>  realy at geonomica at gmail.com) . I've tryed to build a wrape with swig
>  olso with same code and I can access at all the function.

You can use objdump from mingw or cygwin to look inside the dll and
see exactly what it is exporting, eg

objdump -x OurSharedCodeLibrary.dll

This prints a great deal of stuff!  In the middle you'll see

[snip]
The Export Tables (interpreted .rdata section contents)
[snip]
Ordinal/Name Pointer] Table
        [   0] OSCL_DEBUG_fakeInitComplete
        [   1] OSCL_close
        [   2] OSCL_displayIdent
        [   3] OSCL_getCurrentDynamicParams
        [   4] OSCL_getCurrentStaticParams
        [   5] OSCL_getErrorString
        [   6] OSCL_getIdent
[snip]

This is a dll we used in a project, and those names exactly worked
with ctypes, eg some snips from the ctypes code

        self.dll = cdll.LoadLibrary("OurSharedCodeLibrary")
        self.dll.OSCL_getErrorString.restype = c_char_p

    def getErrorString(self, status):
        return self.dll.OSCL_getErrorString(c_int(status))

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From saluk64007 at gmail.com  Thu May 22 21:19:47 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Thu, 22 May 2008 18:19:47 -0700
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <c3f69bf60805221819s4c2d241dkf9788b9759e56968@mail.gmail.com>

In my experience, python is very pattern agnostic.  You can do functional or
object oriented or procedural fairly easily, have deep or light object
trees, or even mix procedural style with some object oriented code if you
like.  "There should be one way to do it" tends to not apply as much as some
would say, although the language doesn't bend over backward to make sure
programmers have flexibility.

MVC is a well respected pattern, and most of the major python web frameworks
are designed in an MVC way, so you should be just fine to use MVC for your
application.  Worry more about what pattern fits your application, than
whether your pattern fits the language.  For myself, whenever I try to do
strict MVC, it always tends to blend together.  I usually get some sort of
MC+V or MV+C sort of hybrid.  The model is also the view, or the controller
is also the model.  But that's just how I think.

Just keep in mind that python is not java, and you should be able to
transition very easily.  In fact, you could pretend python is java and go
far, but you risk irritating other python programmers who look at your code
:)  We had to use jython for a class, and my friend's code (he's a java
programmer) made me want to pull out my hair.  Private variables and get/set
functions all over the place...
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From afrobeard at gmail.com  Thu May 15 19:52:16 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:52:16 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>
Message-ID: <76eda66f-0075-41b4-9bd8-404db917a323@k13g2000hse.googlegroups.com>

l.__delslice__(0,len(l)) is an expression as it returns None which is
a value


On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following proposed solution is not intended to be a solution, it
> > goes completely against the zen of python. [Type import this into the
> > python command interpreter]
>
> > I brought it down to two lines:-
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > itertools would still be a better approach in my opinion.
>
> > Just because I'm curious to know, can anyone bring it shorter[even if
> > its cryptic] than this without invoking any Python Library.
>
> > P.S. Once again I would not recommend using this as Explicit is better
> > than Implicit
> > P.P.S. It is strongly undesirable for us humans to use anything
> > starting with __ :)
>
> > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > | It seems that I rather frequently need a list or iterator of the form
> > > > | [x for x in <> while <>]
>
> > > > I can think of two ways to interpret that.
> > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > >> the expression <B> is false.
>
> > > def gen(a):
> > > ? ? for x in a:
> > > ? ? ? ? if B: break
> > > ? ? ? ? yield x
>
> > > a_gen = gen(A)
>
> > > # now iterate over a_gen
>
> > > --
> > > Geoff- Hide quoted text -
>
> > - Show quoted text -
>
> In your original, you have:
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> You may be hyperextending the use of '..if..else..', which is one of
> my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> an expression.



From benjamin.kaplan at case.edu  Mon May 19 05:31:47 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Mon, 19 May 2008 05:31:47 -0400
Subject: python script to windows exe
In-Reply-To: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805190231y7e5d9e46r156ec9b6cdb0bd84@mail.gmail.com>

On Mon, May 19, 2008 at 3:32 AM, sandeep <shiningsandy at gmail.com> wrote:

> hi all
>
> i am very much a newbie to python but has some experience of
> development.i am trying to write a script which will loop through the
> outlook 2003 inbox and save the email data in an simple data.html page
> and save all the attachments in a folder name emails.after some
> initial struggling i am able to write this script.but now i want to
> create the exe file of this script.i have used py2exe for this job and
> created the exe. but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here. i am using python2.5 and is using
> py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
> service pack2.
>
>
> thanks and reagrds
> sandeep kumar sharma
> --
> http://mail.python.org/mailman/listinfo/python-list
>


What exactly are those errors? You can get more help if we know more about
the problem.
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From pavlovevidence at gmail.com  Mon May 12 19:10:51 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 12 May 2008 16:10:51 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
Message-ID: <2b5e2e48-c787-4648-b0e2-54c1dd68bcb5@x35g2000hsb.googlegroups.com>

On May 12, 7:03 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > IMHO, whether a varibale is used or not has got to be one of the least
> > important things of all (in no small part because it's easily
> > discernable from nearby code).
>
> I couldn't disagree more.
>
> If you're binding a name to a value that will never be used, you're
> doing me (the reader of the code) a great favour if you indicate
> clearly and concisely that this value is not intended to be referenced
> anywhere else. Saving time for the reader is a very important job of
> the writer of code.

I don't think knowing in advance whether a variable is going to be
used or not benefits readability.


Carl Banks


From gnewsg at gmail.com  Tue May 13 14:50:30 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 11:50:30 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>
Message-ID: <da09c7d6-78ff-49fa-b1d5-d085256fe5e7@59g2000hsb.googlegroups.com>

On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:

> We do not live in a pure world, Python isn't pure (practicality beats
> purity), and by attempting to send some data each time a .push*()
> method is called, there are measurable increases in transfer rates.

Good point. I'd like to ask a question: if we'd have a default
asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
such problem?
I've always found weird that asyncore has such an high default timeout
value.
Twisted, for example, uses a default of 0.01 ms for all its reactors.


From michael.hines at yale.edu  Sat May 24 10:05:45 2008
From: michael.hines at yale.edu (Michael Hines)
Date: Sat, 24 May 2008 10:05:45 -0400
Subject: raising an exception when multiple inheritance involves same base
Message-ID: <1211637945.13961.46.camel@localhost.localdomain>

Hello,
I have a class factory that supports single inheritance but it is
an error if the base appears twice. e.g
class Foo(hclass(h.Vector), hclass(h.List)):
should raise an exception since h.Vector and h.List are really the same
extension class, HocObject.

So far I have only been able to do this by iterating over __mro__ during
creation of an object as in:

def hclass(c):
    class hc(hoc.HocObject):
        def __new__(cls, *args, **kwds):
            m = False
            for x in cls.__mro__:
                if (type(x) == type(hc)):
                    if m == True:
                        raise HocError, 'Multiple inheritance...'
                    m = True
            kwds.update({'hocbase':cls.htype})
            return hoc.HocObject.__new__(cls, *args, **kwds)
    setattr(hc, 'htype', c)
    return hc

Is there a way to do the test earlier (e.g during creation of the Foo
class when hclass is called the second time
instead of during creation of a Foo object).
Just before the return hc, print hc.__mro__ yields for the second call:
(<class '__main__.hc'>, <type 'hoc.HocObject'>, <type 'object'>)
wheras in the __new__, print cls.__mro__ yields:
(<class '__main__.Foo'>, <class '__main__.hc'>, <class '__main__.hc'>,
<type 'hoc.HocObject'>, <type 'object'>)


Thanks,
Michael





From mrkafk at gmail.com  Sat May  3 19:29:44 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 16:29:44 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
	<f3d28eb3-dc40-4e33-87ea-ed6844d5bdc9@m3g2000hsc.googlegroups.com>
Message-ID: <c2930007-bfa9-4e74-90b3-40693c9eaa3b@59g2000hsb.googlegroups.com>

On 4 Maj, 01:27, mrk... at gmail.com wrote:

> >>> a={1:'a', 2:'b', 3:'c'}

Oops, it should obviously be:

>>> dict(zip(a.values(), a.keys()))
{'a': 1, 'c': 3, 'b': 2}



From gagsl-py2 at yahoo.com.ar  Tue May 27 22:02:32 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 23:02:32 -0300
Subject: convert string number to real number - ValueError: invalid
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
Message-ID: <op.ubudaihgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 13:00:05 -0300, David Jackson <davidj411 at gmail.com>  
escribi?:

> i used the csv module and saved its contents to a list.
>
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
>
>
> the credit/debit fields are strings.
> what should i have done within the CSV module to make numbers appear as
> numbers?
> how can i remove the quotes to make them numbers? i realize i posted a
> solution to this once before (same posting thread) but i am thinking  
> there
> is a better method.

What do you want to do with those empty strings? Convert them to zeros?  
Suppose your list is named `rows`:

for i,row in enumerate(rows):
     if not i: continue # skip titles
     row[3] = float(row[3] or 0)
     row[4] = float(row[4] or 0)

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Fri May  9 01:26:22 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:26:22 -0300
Subject: Cannot import opj
References: <5dc598e30805081728i7d451bber36991f5a547874a7@mail.gmail.com>
Message-ID: <op.uavf18enx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 21:28:25 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> I'm trying to import the opj module

What's the opj module?

> Trying like this:
> from Main import opj
> It says it doesn't exists

And why do you think it should exist?

> And like this:
> import os.path.join as opj
> Raises error.
> What should I do?

os is a module, os.path is a module too, which contains a function named  
join. You can't import it that way. Try:

a) from os.path import join as opj
b) import os.path
    opj = os.path.join

You import modules (or packages) using "import xxx", or you import  
individual attributes from those modules or packages using "from xxx  
import yyy"

What are you really trying to do?

-- 
Gabriel Genellina



From cephire at gmail.com  Sun May  4 07:41:15 2008
From: cephire at gmail.com (Joseph)
Date: Sun, 4 May 2008 04:41:15 -0700 (PDT)
Subject: ISBN Barecode reader in Python?
Message-ID: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>

All: I have written a program to query Amazon with ISBN and get the
book details. I would like to extend so that I can read ISBN from the
barcode (I will take a photo of the same using webcam or mobile). Are
there any opensource/free SDK doing the same? As it is a hobby
project, I don't like to spend money on the SDK.

Thank you all for your suggestions/time,
Joseph
http://www.jjude.com


From goldnery at gmail.com  Fri May 23 09:24:20 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 06:24:20 -0700 (PDT)
Subject: WXpython Question
Message-ID: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>

I try to reach a specific wx StaticText element's text and to change
it by clicking on a button


now let's say the this is my element:

wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)


And this is my EVT_BUTTON bind function :

def OnClick(event):

which code shude i enter to change "hello" to "goodbay"?

thanks


From mensanator at aol.com  Thu May 22 14:53:56 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 22 May 2008 11:53:56 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>

On May 22, 11:32?am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?

If you actually need that many digits, use a different library.

>>> import gmpy

>>> print gmpy.pi(64) # 64 bit precision
3.14159265358979323846
>>> print gmpy.pi(128) # 128 bit precision
3.141592653589793238462643383279502884197
>>> print gmpy.pi(16384) # 16384 bit precision
3.14159265358979323846264338327950288419716939937510582097494459
2307816406286208998628034825342117067982148086513282306647093844
6095505822317253594081284811174502841027019385211055596446229489
5493038196442881097566593344612847564823378678316527120190914564
8566923460348610454326648213393607260249141273724587006606315588
1748815209209628292540917153643678925903600113305305488204665213
8414695194151160943305727036575959195309218611738193261179310511
8548074462379962749567351885752724891227938183011949129833673362
4406566430860213949463952247371907021798609437027705392171762931
7675238467481846766940513200056812714526356082778577134275778960
9173637178721468440901224953430146549585371050792279689258923542
0199561121290219608640344181598136297747713099605187072113499999
9837297804995105973173281609631859502445945534690830264252230825
3344685035261931188171010003137838752886587533208381420617177669
1473035982534904287554687311595628638823537875937519577818577805
3217122680661300192787661119590921642019893809525720106548586327
8865936153381827968230301952035301852968995773622599413891249721
7752834791315155748572424541506959508295331168617278558890750983
8175463746493931925506040092770167113900984882401285836160356370
7660104710181942955596198946767837449448255379774726847104047534
6462080466842590694912933136770289891521047521620569660240580381
5019351125338243003558764024749647326391419927260426992279678235
4781636009341721641219924586315030286182974555706749838505494588
5869269956909272107975093029553211653449872027559602364806654991
1988183479775356636980742654252786255181841757467289097777279380
0081647060016145249192173217214772350141441973568548161361157352
5521334757418494684385233239073941433345477624168625189835694855
6209921922218427255025425688767179049460165346680498862723279178
6085784383827967976681454100953883786360950680064225125205117392
9848960841284886269456042419652850222106611863067442786220391949
4504712371378696095636437191728746776465757396241389086583264599
5813390478027590099465764078951269468398352595709825822620522489
4077267194782684826014769909026401363944374553050682034962524517
4939965143142980919065925093722169646151570985838741059788595977
2975498930161753928468138268683868942774155991855925245953959431
0499725246808459872736446958486538367362226260991246080512438843
9045124413654976278079771569143599770012961608944169486855584840
6353422072225828488648158456028506016842739452267467678895252138
5225499546667278239864565961163548862305774564980355936345681743
2411251507606947945109659609402522887971089314566913686722874894
0560101503308617928680920874760917824938589009714909675985261365
5497818931297848216829989487226588048575640142704775551323796414
5152374623436454285844479526586782105114135473573952311342716610
2135969536231442952484937187110145765403590279934403742007310578
5390621983874478084784896833214457138687519435064302184531910484
8100537061468067491927819119793995206141966342875444064374512371
8192179998391015919561814675142691239748940907186494231961567945
2080951465502252316038819301420937621378559566389377870830390697
9207734672218256259966150142150306803844773454920260541466592520
1497442850732518666002132434088190710486331734649651453905796268
5610055081066587969981635747363840525714591028970641401109712062
8043903975951567715770042033786993600723055876317635942187312514
7120532928191826186125867321579198414848829164470609575270695722
0917567116722910981690915280173506712748583222871835209353965725
1210835791513698820914442100675103346711031412671113699086585163
9831501970165151168517143765761835155650884909989859982387345528
3316355076479185358932261854896321329330898570642046752590709154
8141654985946163718027098199430992448895757128289059232332609729
9712084433573265489382391193259746366730583604142813883032038249
0375898524374417029132765618093773444030707469211201913020330380
1976211011004492932151608424448596376698389522868478312355265821
3144957685726243344189303968642624341077322697802807318915441101
0446823252716201052652272111660396665573092547110557853763466820
6531098965269186205647693125705863566201855810072936065987648611
7910453348850346113657686753249441668039626579787718556084552965
4126654085306143444318586769751456614068007002378776591344017127
4947042056223053899456131407112700040785473326993908145466464588
0797270826683063432858785698305235808933065757406795457163775254
2021149557615814002501262285941302164715509792592309907965473761
2551765675135751782966645477917450112996148903046399471329621073
4043751895735961458901938971311179042978285647503203198691514028
7080859904801094121472213179476477726224142548545403321571853061
4228813758504306332175182979866223717215916077166925474873898665
4949450114654062843366393790039769265672146385306736096571209180
7638327166416274888800786925602902284721040317211860820419000422
9661711963779213375751149595015660496318629472654736425230817703
6751590673502350728354056704038674351362222477158915049530984448
9333097


From matthieu.brucher at gmail.com  Tue May 13 13:58:01 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Tue, 13 May 2008 19:58:01 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>

>
> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
>
>  Write 10^2.
>
> but can't understand why another programming language gives the answer
> 8 (Python):
>
>  Print 10^2
>
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.
>

Well...

>>> 10**2
100

Why ^ ? There is no good reason why use ^ over ** and vice versa, so what
you try to prove is not with your example.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From duncan.booth at invalid.invalid  Fri May 30 10:02:31 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 May 2008 14:02:31 GMT
Subject: convert string containing list to list (or tuple) type
References: <g1p15p$4jo$1@aioe.org>
Message-ID: <Xns9AAE98FA47D44duncanbooth@127.0.0.1>

"Poppy" <znfmail-pythonlang at yahoo.com> wrote:

> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
> 
> for ea in (a,b,c):
>     print lst_codes(ea.strip(","))
> 

Why not just use:

 ea.strip(',').split(',')

?

-- 
Duncan Booth http://kupuguy.blogspot.com


From marlin_rowley at hotmail.com  Fri May 16 20:36:44 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 19:36:44 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <g0l6kf$dhk$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<g0l6kf$dhk$1@ger.gmane.org>
Message-ID: <BAY135-W2763B4196E05928CA880609FCB0@phx.gbl>

Ok.  Here's the deal.. 
 
I've gathered a string of bytes that are turned into floats and stored in an array of floats.
 
The stream gives me color channels represented in bytes.
 
stream = 'rrrrrrrrggggggggggbbbbbbbbbaaaaaaaaarrrrrrrrrrrggggggggggbbbbbbbbbbaaaaaaaa......' etc.. 
 
the number of r's,g's,b's in one consecutive pattern represent the width of a bitmap.  The number of times the pattern (rgba) is repeated gives the height of the bitmap.  I must first convert these bytes into floats.  The rgba represents floating point values for each of the pixel components.  I've gotten that far.
 
Now I have an array of individual floats with that pattern.  I need to:
 
1) pull out the alphas from this float list.
2) reshape this float list so that I have an array that seperates the repeated pattern into a height of this bitmap: 
 
rrrrrrrrrrrgggggggggggbbbbbbbbb [0] - first pattern
...
rrrrrrrrrrrgggggggggggbbbbbbbbb [height-1] - last pattern
 
3) then I need to reverse this array so that height-1 is the first element in my new array:
 
rrrrrrrrrrrgggggggggggbbbbbbbbb [height-1]
...
rrrrrrrrrrrgggggggggggbbbbbbbbb [0]
 
since wx.Python reverses the y-axis in a bitmap
 
4) Then I need to make the pattern another pattern:
rrrrrrrrrrrgggggggggggbbbbbbbbb ---> needs to become ---> rgbrgbrgb.... starting at [height-1] (my first pattern in my new array).
 
5) Then I need to flatten the array to one continuous array of floats:
 
rgbrgbrgbrgb[from height-1]............rgbrgbrgb[height = 0]
 
this is my final array to be drawn on the screen!
 
 
 
 



> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 18:50:38 -0500> > Marlin Rowley wrote:> > All:> > > > Say I have an array:> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > I'm sorry, you are going to have to be less elliptical. Exactly what do you have > there? It's certainly not an array, but a tuple of single-element lists each > containing a single string which can be interpreted as a group of 4 IEEE-754 > single-precision floats. Is this correct? Do you really have single-element > lists? Some more context would be nice (can the tuple be longer? can the lists > be longer? can the strings be longer? etc.).> > But basically, I would concatenate all of the strings together in the correct > order and use numpy.fromstring() on the resulting string.> > And please, just respond to the list. I read this through GMane, and I don't > like getting duplicates in my in-box.> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From thomas.troeger.ext at siemens.com  Tue May 20 05:35:23 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 11:35:23 +0200
Subject: Embedding Python question.
Message-ID: <g0u60r$qo0$1@aioe.org>

Dear all,

I've successfully embedded the Python interpreter into a set of C/C++ 
application programs that use a larger library project with information 
from http://docs.python.org/api/api.html and 
http://docs.python.org/ext/ext.html. Now I want to wrap classes and 
functions from the associated libraries so that I can write new 
applications completely in Python, but I'm not entirely sure how to 
start because I have some problems understanding which is the best way. 
It would be nice if someone could answer the following questions and 
clarify this matter:

- until now I've used the approach as documented in 
http://docs.python.org/ext/extending-with-embedding.html to extend the 
embedded interpreter and that works pretty well. I'd like to use a 
similar approach for other C applications. Can I write a C library that 
implements this technique and link it into all C applications that need 
Python support, or is there a better, more elegant way?

- in the documentation, there's an example that illustrates the creation 
of a python module for pure extending of a python script (the Noddy 
stuff). Do I have to make a separate module for each library I want to 
wrap? If yes, how can I manage the case where two libraries can access 
each other?

- if I write an extension module, how can I handle the case where the C 
wrapper methods want to call back into the same Python interpreter instance?

- I think my questions break down into a reference to documentation 
where a similar problem is explained in detail. Does anyone have such 
information?

Thanks!
Thomas.


From aspersieman at gmail.com  Mon May 12 03:18:46 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 12 May 2008 09:18:46 +0200
Subject: Python and the Bartender
In-Reply-To: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>
References: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>
Message-ID: <4827EF56.805@gmail.com>

castironpi at gmail.com wrote:
> Incidentally, now that everyone knows English, writer would like to
> critique his behavior.  I have leaned to the group for approval, at
> times by disparaging the efforts of others, but other times not.  I
> have expressed negative emotion.  Is anyone in earshot getting work
> done that I am interfering with?
>
> Otherwise, I might start telling jokes.
>
> Sincerely,
> Two For Bartenders.
>
> P.S.  Please don't write the movies.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   
Huh?

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From gagsl-py2 at yahoo.com.ar  Sun May  4 01:33:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 02:33:10 -0300
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
Message-ID: <op.ual61kdox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegill7 at gmail.com> escribi?:

> Is there a good place to look to see where I can find some code that
> will help me to save webpage's links to the local drive, after I have
> used urllib2 to retrieve the page?
> Many times I have to view these pages when I do not have access to the
> internet.

Don't reinvent the wheel and use wget
http://en.wikipedia.org/wiki/Wget

-- 
Gabriel Genellina



From stevegill7 at gmail.com  Tue May 13 20:12:31 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 13 May 2008 17:12:31 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<68rmafF2t1vboU1@mid.uni-berlin.de>
Message-ID: <2e9d8a88-2f40-4f1d-bcba-b57791a4b9fb@l42g2000hsc.googlegroups.com>

On May 12, 4:06 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jetus schrieb:
>
>
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> > So, in summary, when I download this page, for each record, I would
> > like to initiate the "view" link.
> > Can anyone point me in the right direction?
>
> > When the "view" link is clicked on in IE or Firefox, it returns a pdf
> > file, so I should be able to download it with
> > urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
>
> > Here is the following code I have been using
> > ----------------------------------------------------------------
> >     import urllib, urllib2
>
> >     params = [
> >                 ('booktype', 'L'),
> >                 ('book', '930'),
> >                 ('page', ''),
> >                 ('hidPageName', 'S3Search'),
> >                 ('DoItButton', 'Search'),]
>
> >     data = urllib.urlencode(params)
>
> >     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> > S3DataLKUP.jsp", data)
>
> >     s = f.read()
> >     f.close()
> >     open('jcolib.html','w').write(s)
>
> Use something like the FireBug-extension to see what the
> openimagewin-function ultimately creates as reqest. Then issue that,
> parametrised from parsed information out of the above href.
>
> There is no way to interpret the JS in Python, let alone mimic possible
> browser dom behavior.
>
> Diez

Thanks Diez;
Never used Firebug, and could not find the http-header section, but it
lead me to Tamper Data, and that was perfect to give me the headers.
Thanks for the input.


From wizzardx at gmail.com  Sun May  4 10:41:37 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 16:41:37 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
Message-ID: <18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>

On Sun, May 4, 2008 at 4:25 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> Hi,
>
> anyone know a Python library to grab the size of a selected image region
> (the selection will be made with the mouse), that work in Linux ?

You might be able to use this tool:

http://freshmeat.net/projects/gtkshots/

David.


From kurosknight at gmail.com  Sun May 25 17:00:12 2008
From: kurosknight at gmail.com (Kuros)
Date: Sun, 25 May 2008 17:00:12 -0400
Subject: Storing a function
Message-ID: <fe46746a0805251400g47c08a74gd63625330a8e547f@mail.gmail.com>

Hi,
Hoping I could get some help with a python question.

I want to be able to store the code for a single function in a .py file,
such as:

def test():
    print "Test"

>From within a Python script, I would like to be able to get a handler so I
can do something like:

handler.test()

I want to be able to store the handlers in a blob in a SQLite DB.
Essentially, I want to store a compiled version of a function. I have tried
using compile() and exec, and while it sort of works, it seems to import the
code into the global namespace. I can do:

x = compile(file.read(), "<x>", 'exec')
exec x
test()

and it calls test, but I may have several functions with the same name, all
read from different files. So I need to be able to do handler.test().

Any advice would be greatly appreciated!

-Kuros
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From kamhung.soh at gmail.com  Sat May 17 02:54:52 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 17 May 2008 16:54:52 +1000
Subject: set function
References: <aa405c1f0805162249u45280c76v82f72daa0a748635@mail.gmail.com>
Message-ID: <op.ubadhqb6ev04yd@hungvista>

On Sat, 17 May 2008 15:49:05 +1000, Beema shafreen  
<beema.shafreen at gmail.com> wrote:

> Hi all,
> I need to find the intersection of 10 different files with ids defined as
> a_items, b_items and so on
>
> common_items = a_items&b_items&c_items&\
>                d_items&e_items&f_items\
>                &g_items&h_items&i_items&j_items
>
> i have included above line in the script
> is this an right way will my program accept it or what are the other  
> option
> to compare 10 different such items

See "Set Types", http://docs.python.org/lib/types-set.html.  Example:

s1 = set([1,2,3])
s2 = set([3,4,5])
s1 & s2
set([3])

You can populate your sets using an iterable, such as the lines from a  
file.  Example:

s1 = set(file(r'blah.txt'))

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From drobinow at gmail.com  Thu May 22 18:14:12 2008
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Thu, 22 May 2008 15:14:12 -0700 (PDT)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
	<a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>
Message-ID: <27edaccd-d3a4-4bcc-a471-a71d8397983d@f36g2000hsa.googlegroups.com>

On May 22, 3:56 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 22, 2:44 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
> wrote:
>
>
>
> > TkNeo wrote:
> > > I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> > > be upgraded. Can you guys tell me if this scenario is possible.
>
> > > 1. Any machine that uses .py files that use libraries that require 2.4
> > > will have 2.4 on it.
> > > 2. rest of the machines will have 2.3
>
> > > now there is a shared drive. lets say i write a new library called
> > > testlib.py and put it on the shared drive .. when a script uses it
> > > from a 2.4 based machine, it will generate a testlib.pyc and leave it
> > > on the shared drive. going forward that .pyc is used until the
> > > original lib is changed. now lets say a 2.3 based machine is trying to
> > > use that lib. it will try to use that pyc file which was compiled by
> > > py2.4. will it work or crash ?
>
> > It should work, as long as the original .py file is still there.  Each Python
> > version will check for a .pyc file *corresponding to that version* (e.g. Python
> > 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't
> > exist, overwriting any existing .pyc file in the process.
>
> > If the original .py file is *not* there, it will most likely not work.  If you
> > try to import a .pyc file with the wrong version number, you get something like
> > this:
>
> >  >>> import foo
> > Traceback (most recent call last):
> >    File "<stdin>", line 1, in ?
> > ImportError: Bad magic number in foo.pyc
>
> > I'm not sure what would happen if multiple Pythons try to write a .pyc file at
> > the same time, though...
>
> > --
> > Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/
>
> The original .py will always be there but you know what, multiple
> python versions from different computers do access that one library at
> the same time.
>
> Anyone know a possible solution ?

What error message are you getting?


From pscott at uwc.ac.za  Mon May  5 10:36:27 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:36:27 +0200
Subject: Nested os.path.join()'s
In-Reply-To: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>
References: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>
Message-ID: <1209998187.7106.34.camel@paul-laptop>


On Mon, 2008-05-05 at 10:34 -0400, Jean-Paul Calderone wrote:
> How about not nesting the calls?
> 
>     >>> from os.path import join
>     >>> join(join('x', 'y'), 'z') == join('x', 'y', 'z')
>     True
>     >>>
> 

Great! Thanks. Didn't realise that you could do that... :)

--Paul

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From paul.hankin at gmail.com  Wed May  7 17:23:22 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 7 May 2008 14:23:22 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <2dcc24c4-a9df-438f-bf6e-6ebf7fdfd0bf@l42g2000hsc.googlegroups.com>

On May 7, 5:39?pm, umpsu... at gmail.com wrote:
> Here is my code for a letter frequency counter. ?It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..

Yours is a little more efficient than this, but here's a compact way
to write what you want.

import heapq

def mostfreq(message):
    return heapq.nlargest(3, set(message), key=message.count)

--
Paul Hankin


From dax2006 at googlemail.com  Mon May  5 11:02:41 2008
From: dax2006 at googlemail.com (WorldWide)
Date: Mon, 5 May 2008 08:02:41 -0700 (PDT)
Subject: Interested to code leecher mods in python?
Message-ID: <e328b3dc-2f80-49b2-8ebb-2351f13c6b09@27g2000hsf.googlegroups.com>

Hi. Is here anyone interested to help us code some bittorrent leecher
mods?
We need a bit help with the gui in the mods.
You just need to have python knowledge.
We have our own [quite successful] forums and a great team.

Please email me: dax2006 at gmail.com

best regards


From kyosohma at gmail.com  Thu May 22 14:58:02 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 11:58:02 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com> 
	<26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com>
Message-ID: <a71352c3-a9db-41ac-a176-1bd9645b006e@x41g2000hsb.googlegroups.com>

On May 22, 1:38?pm, Geoldr <geo... at gmail.com> wrote:
> On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > > Hello all, I have written a simple program, and at the end of it,
> > > instead of it closing I would like it to restart from the beggining.
> > > Is there a way to do this? Put my code into a class function, or
> > > something?
> > > I guess I could do a while loop, but I think if there is a way to run
> > > my code if it's in a class would be an easier option. I can't seem to
> > > find many guides online but maybe I have not been looking in the right
> > > places.
>
> > > Anybody have any ideas?
>
> > Putting your code in a function or class is probably the way to go.
> > When I was doing C++, we'd just use a while loop for simple stuff,
> > though.
>
> > It really shouldn't be all that hard to tell the code to call up the
> > beginning of the program again.
>
> > Mike
>
> That's what I am trying to figure out, but it doesn't seem to work. Do
> you have any example code of classes/functions that work for you?

No...but I through some concept code together that does the basics:

<code>

def repeater():

    for i in range(10):
        print i

def main():
    ret = 'Y'
    while 1:
        if ret.upper() == 'Y':
            repeater()
        else:
            print 'Program finished...goodbye!'
            break
        ret = raw_input('Do you want to continue? (Y/N)')

if __name__ == '__main__':
    main()

</code>

I found that using the while was the easiest to create on short
notice. You could probably do it with recursion too, but I'm not
especially good at that.

Another idea is to have some kind of sentinel value that both
functions can access and use it somehow to tell whether or not to
repeat.

Hope that helps you get going.

Mike


From asmodai at in-nomine.org  Fri May  2 01:12:44 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Fri, 2 May 2008 07:12:44 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87abj91j8u.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <20080502051244.GP78165@nexus.in-nomine.org>

-On [20080502 05:26], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>I've never clearly understood why people want to use "#! /usr/bin/env
>python", which is prone to finding a different Python from the one
>installed by the operating system. I'd be interested to see what
>responses are in favour of it, and what the reasoning is.

Simple, some systems are not as peculiar as a lot of Linux boxes which
chug everything into /usr/bin, which is OS territory (as has been decreed
long ago by hier(7)), but rather use /usr/local/bin (all BSD Unix and
derivatives) or /opt or whatever convention a particular operating system
has.

And prone to find the wrong Python, it all depends upon proper $PATH
administration.

As such, your script with #!/usr/bin/python is as bad as an ash shell script
with #!/bin/bash. #!/usr/bin/env python is more cross-OS friendly, there's
more than just Linux you know.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
I dream of Love as Time runs through my hand...


From jenn.duerr at gmail.com  Wed May 14 14:10:37 2008
From: jenn.duerr at gmail.com (Jennifer Duerr)
Date: Wed, 14 May 2008 11:10:37 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
References: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>
	<c36592e2-8a07-4445-9d71-bfffd6d807fd@27g2000hsf.googlegroups.com>
Message-ID: <2a0dae47-e141-476c-a0fd-a5c595edc354@q1g2000prf.googlegroups.com>

On May 14, 12:59?pm, Waldemar Osuch <waldemar.os... at gmail.com> wrote:
> On May 13, 1:02 pm, Jennifer Duerr <jenn.du... at gmail.com> wrote:
>
>
>
>
>
> > All,
>
> > I need help concerning SOAP, Python and XML. I am very new to this, so
> > dumbing it down for me will not offend me!
>
> > I'm using Python and want to send a user-inputted string to an
> > existing Java web app that
> > will output results to XML. I need to capture elements of the XML and
> > put
> > the info into a table. (say I send a single/simple address string to
> > this
> > webservice/geocode, which then returns numerous possible matches with
> > XY
> > values and score values, and I want to capture that into a table)
>
> > How do I go about doing this? I'm told I need to use SOAP. I
> > discovered that
> > the best module to use is ZSI (please correct me if I'm wrong). I have
> > installed the necessary module. Examples I have seen are plenty and
> > all so different, its not clear to me how to go about. ?I have been
> > spinning my wheels for too long on this!
>
> > Can someone provide some example code similar to what I need to do? Or
> > any
> > guidance would be appreciated.
>
> > Thanks!
>
> It looks like you have three tasks here:
> ?- get data
> ?- parse it
> ?- store it
>
> SOAP could be the means to accomplish only the first one.
>
> If the service you use exposes the functionality using XML-RPC or some
> REST-ful methods I would try them first. ?If it does not, then
> you are stuck with SOAP. Using SOAP in Python is currently
> not as straightforward as it could be.
>
> You have chosen to use ZSI and that is fine choice.
> In documentation look for "wsdl2py".
> Given a URL to a WSDL file it will generate stub class definition
> with methods corresponding to the SOAP service methods.
> In your code you would instantiate the class, call the method you want
> and grab the payload. ?Your first task is done.
>
> From what I understand the payload will be XML that will need to be
> parsed. ?For that you could use the excellent ElementTree
>
> If I were you I would investigate suds (https://fedorahosted.org/suds)
> It promises to be easier to use than ZSI. ?The README has the usage
> example.
>
> Waldemar- Hide quoted text -
>
> - Show quoted text -

Thanks for your reply.
I got some help from a fellow co-worker.  We worked out this, so far.
Seems to be working...

[[my url is local, so use another, and also then choose an appropriate
value for the user_input var]]
import urllib, urllib2
from xml.dom import minidom

user_input = 'xyz'
url = 'http://xxx.....' #geocoding servlet url
values = {'address': user_input} #

data = urllib.urlencode(values)
req = urllib2.Request(url, data)
response = urllib2.urlopen(req)
xmlResults = response.read()
#print xmlResults

xmldoc = minidom.parseString(xmlResults)
places = xmldoc.getElementsByTagName('Placemark')

nameTag = places[0].getElementsByTagName('name')
print nameTag[0].firstChild.wholeText

descriptionTag = places[0].getElementsByTagName('description')
print descriptionTag[0].firstChild.wholeText

coordinatesTag = places[0].getElementsByTagName('coordinates')
print coordinatesTag[0].firstChild.wholeText


From mail at timgolden.me.uk  Fri May  9 16:55:48 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 09 May 2008 21:55:48 +0100
Subject: Not able to get utf8 encoded string into a document
In-Reply-To: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>
References: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>
Message-ID: <4824BA54.1020308@timgolden.me.uk>

Lawrence, Anna K (US SSA) wrote:
> I am working on a web application using Pylons .0.9.6, SQLAlchemy 0.4.4, 
> MySQLdb 1.2.2 and Python 2.4.4.
> 
> We want to use utf8 encoding throughout and as far as I can see 
> everything is set properly between components and I?ve got a 
> sitecustomize.py in my site-packages directory of python set to utf8 as 
> well.  Everything is stored properly in the database and displays nicely 
> in the app.  However, when I try to take a string that is coming out of 
> the database and export it to a Word document, no amount of 
> encoding/decoding will make the Word doc display properly.
 >
> Since I?m on a Windows machine, my default locale is cp437.  Is this the 
> reason?

 From where I'm sitting, I can't see enough to help. The crucial
thing seems to be in this phrase: "When I try to take a string that
is coming out of the database and export it to a Word document,
no amount of encoding/decoding will make the Word doc display properly".
It presumably doesn't matter what web framework etc. you're using:
you either get a unicode object or an encoded string from the database
and you're putting that in a Word doc. Is that correct?

Can you provide a sample of code which shows what you're doing, and
explain what does / doesn't happen? By way of trying to get closer,
there's a Noddy example below:

<code>
import win32com.client

word = win32com.client.gencache.EnsureDispatch ("Word.Application")
word.Visible = 1
doc = word.Documents.Add ()
doc.Range ().Text = u"poup\u00e9e"

</code>

Now, on my Win2K machine this displays perfectly well in word with
the French word poupee with the penultimate e having an acute
accent. So, translating this minimalist example into your situation,
what happens when you try doing this?

TJG


From rhamph at gmail.com  Wed May  7 12:04:33 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Wed, 7 May 2008 09:04:33 -0700 (PDT)
Subject: FreeBSD KeyboardInterrupt not captured
References: <96da774d-2746-4c5e-9947-e36860dd7461@p39g2000prm.googlegroups.com>
Message-ID: <025274b5-4b4e-4f50-ad8f-c4a4b688f5f8@w8g2000prd.googlegroups.com>

On May 7, 5:00 am, radim.ma... at gmail.com wrote:
> Hi Guys,
>
> during testing of my project on FreeBSD I've discovered stange
> 'feature' of time.sleep(). It works if single thread is running, but
> when multi-threaded, the SIGINT signal seems not to be handled in same
> way.
>
> I've found three discussion about similar behavior with os.system()
> but so far none of the suggested patches worked.
>
> I've limited test to following code:
>
> import time
> import sys
> import threading
>
> class MyThread(threading.Thread):
>         def __init__(self):
>                 super(MyThread, self).__init__()
>                 self.start()
>
>         def run(self):
>                 while True:
>                         try:
>                                 time.sleep(10)
>                         except KeyboardInterrupt:
>                                 print 'thread keyboard interrupt'
>
> def main():
>         my = MyThread()
>
>         while True:
>                 try:
>                         time.sleep(5)
>                 except KeyboardInterrupt:
>                         print 'got it'
>
> if __name__ == '__main__':
>         main()
>
> Any suggestions?

Python doesn't support interrupting non-main threads with a signal.
You have to use something else you can manually end, like a Condition
with a timeout or a poll of a fd with a timeout.


From ivan.illarionov at gmail.com  Mon May 12 06:04:17 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 10:04:17 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
	<g08pnf$2lbi$1@news.mtu.ru> <877ie06kdl.fsf@benfinney.id.au>
Message-ID: <g094n0$2o91$1@news.mtu.ru>

>> On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote: [...]
>> > That is also regrettably common in Python code. It still suffers from
>> > being unnecessarily ambiguous, since there are *also* plenty of loops
>> > using 'i', 'j', etc. where the loop counter *is* used.
>> > 
>> > Differentiating these use cases by appropriate naming is, IMO, worth
>> > the effort of choosing a meaningful name.
>> 
>> Even if the counter is not used inside the loop's body it's still in
>> control of the whole loop
> 
> Not in Python it's not. The values that come out of the iterator aren't
> "in control of the loop". The state for the loop is in the *iterator*,
> not the values that come out.
> 
> Having access to the values that come from the iterator is usually
> useful, but regardless of whether one uses them or not, they're *not*
> controlling the loop, and it's confusing to imply that they are.

I agree that "in control" was incorrect phrase.
 
> So, when not using the values that come from the controlling iterator,
> it's good to make that explicit. If Python supported it, we might prefer
> to use no name at all for something that isn't used, but the 'for'
> syntax doesn't allow that.
> 
> In the absence of supporting syntax, the next best thing is to choose a
> name that *does* make it explicit that the values will not be used.

Name 'i' does not imply whether it's used inside the loop or not.
IMO it perfectly covers both cases.

It may have small advantage to "make it explicit that the values will not 
be used", but names like "dummy", "unused", "ignored" or "junk" can be 
confusing for some people and break the established conventions for 
counter variable names (and these conventions are reasonable and are 
taken from mathematics). "i" is still the best choice.

And let's agree to disagree. It's clear that we have different opinions 
and it looks that this discussion is not going to change them.

-- Ivan


From zhalbrecht at gmail.com  Tue May 20 12:57:26 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 09:57:26 -0700 (PDT)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <0ad9656b-0624-43aa-b45f-29ec82471797@24g2000hsh.googlegroups.com>

On May 20, 12:26 pm, Zack <zhalbre... at gmail.com> wrote:
> Given a bunch of objects that all have a certain property, I'd like to
> accumulate the totals of how many of the objects property is a certain
> value. Here's a more intelligible example:
>
> Users all have one favorite food. Let's create a dictionary of
> favorite foods as the keys and how many people have that food as their
> favorite as the value.
>
> d = {}
> for person in People:
>     fav_food = person.fav_food
>     if d.has_key(fav_food):
>         d[fav_food] = d[fav_food] + 1
>     else:
>         d[fav_food] = 1
>
> d ends up being something like: {'pie': 400, 'pizza': 200, 'burgers':
> 100} if 400 people like pie, 200 like pizza and 100 like burgers.
>
> There's nothing wrong (that I know of) by doing it as I have up there,
> but is there a simpler, easier way? Looking forward to hearing about
> how much of a n00b I am. Thanks in advance!

Er. OK so I realize now that I could have just done this:

d = {}
for person in people:
    fav_food = person.fav_food
    d[fav_food] = d.get(fav_food, 0) + 1



From castironpi at gmail.com  Tue May 13 11:08:42 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:08:42 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <7ff9c6b7-ed99-49eb-8dce-9749b1287f7e@i76g2000hsf.googlegroups.com>

Just catch throw, stuff, and information.  I think it's fine.  I have
an hour to write some code.  Who wants parity stuff?

On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?
>
> Tron! That's one I haven't seen in awhile. I'll have to take a mental
> note to rent the movie again someday. I always thought a game based on
> the movie hackers would be cool. Actually not based on the movie
> itself, but on that 3D computer world they kept breaking into. Ah man,
> it's so funny looking back on that film. Gibson, that's what they
> called it. It was like a 3D database. That in itself wouldn't make a
> very good game, but I suppose one could easily be created around that
> idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> trapped in this 80's looking 3D world that has access to all the
> world's information. More stuff could be thrown in to make it more
> interesting. And of course, there would have to be hidden references
> or parodies to whatever movies inspired it.
>
> Good luck with your project
>
> Sincerely,
> Joshua
>
> On May 13, 9:02?am, castiro... at gmail.com wrote:
>
>
>
> > Hi all.
>
> > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > Now to repeat the subject line. ?I'm stuck in Python.
>
> > Now that was fun. ?I will also try to enumerate simple screen savers
> > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > "overunity", such that one person can't be at liberty to live, which
> > in some technical political arenas would be an "anarchy", but there
> > are sufficiently many of those that I will too.
>
> > Does anyone want such a list, or if not, is it at least fun and
> > recreational to make it? ?The dollar would come along the lines of
> > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > and peaceable. ?(As the above would show, you would be free to
> > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > Guido getting his fair share? ?I am prepared to share with him.)
> > Check in his name.
>
> > I want to try to ally with other programmers and make cool games, like
> > Tron, that one party can make games for on a console, such as live
> > obstacles, incl. tear-down, and certain people have to play from time
> > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > of time. ?Very summer.
>
> > Resemblances would include Dungeons & Dragons with multi-host, or
> > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > attractive (duh). ?As for voice, it's not clear it's the most
> > entertaining, but I just don't have a mic.
>
> > However, forseeing, I return with sailing, but that's in 3-space and
> > not even in code, as though we'd construct the Royal Navy and battle.
> > But I think we can keep it well.
>
> > Thing is, someone has to play it to keep a synch (keep from falling),
> > and tap-outs would have to live.
>
> > Side note: In political theory, this is known as the problem of
> > nominating a successor. ?Would it stay afloat, even for long enough to
> > make it worth the negatives, yes which do include tear-down and fall,
> > invasion of privacy, and rights infrigement?
>
> > I code in Python (get the callbacks), but configurable servers could
> > spread the work out, using relays to put each person on each's own
> > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > c-l-py is the appropriate place to start such a thing, both and ask if
> > it's been done before.- Hide quoted text -
>
> - Show quoted text -



From gherron at islandtraining.com  Sun May  4 03:16:41 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 00:16:41 -0700
Subject: is +=1 thread safe
In-Reply-To: <8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
Message-ID: <481D62D9.8090200@islandtraining.com>

Carl Banks wrote:
> On May 3, 7:44 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Alexander Schmolck wrote:
>>     
>>> AlFire <spamgrinder.tryla... at ggmail.com> writes:
>>>       
>>>>> The threading module already has a function to return the number of Thread
>>>>> objects currently alive.
>>>>>           
>>>> I have threads within threads - so it does not suit me :-(.
>>>>         
>>> How about using a scalar numpy array? They are mutable, so I assume that x +=
>>> 1 should be atomic.
>>>       
>> No NO NO! The only way to increment a variable in memory is through a
>> three step process:
>>     
>
> Yes, this will be atomic.  It's a pretty good idea, in fact.  The
> underlying increment operation is protected by the GIL; it could be
> three, forty, or a hundred steps and it'd be atomic at the Python
> level.
>
>   

But... It's not!  

A simple test shows that.   I've attached a tiny test program that shows 
this extremely clearly.  Please run it and watch it fail.  In this test, 
two threads both increment a shared global variable 1 million times.  
This should end with a value of 2 million, but it rarely does so.   
(Actually it has *never* done so yet.)

The GIL makes sure no two Python threads are running at the same time,  
and from that you can conclude that Python virtual machine instructions 
are atomic, but you cannot conclude that Python statements/expression 
are atomic.  Any Python statement or expression that compiles into more 
than one OP code can be interrupted between those OP codes, and this can 
cause devastating results to the interrupted statement.

Gary Herron


> Carl Banks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

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From benjamin.kaplan at case.edu  Sun May 11 21:05:34 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sun, 11 May 2008 21:05:34 -0400
Subject: how to separate words from a string?
In-Reply-To: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>
References: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>
Message-ID: <ec96e1390805111805t6a16362bo3a9c5be23d030154@mail.gmail.com>

On Sun, May 11, 2008 at 8:15 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Hi, how can I separate words from a sentence in a string? Like the
> java.String.split method
> I need something that gets an string "This is a sentence", and return to em
> a list["This","is","a","sentence"]
> Can anyone help?
> Thx
>

You should probably look in the docs before posting here. Python strings
also have a split method, that does the same thing as in java.
http://docs.python.org/lib/string-methods.html
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From python at bdurham.com  Thu May  8 10:54:15 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 08 May 2008 10:54:15 -0400
Subject: Generate labels for a multi-level outline (THANK-YOU!)
In-Reply-To: <_vKdnaV5jOajFr_VnZ2dnUVZ_gudnZ2d@earthlink.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
	<mailman.713.1210185133.12834.python-list@python.org>
	<_vKdnaV5jOajFr_VnZ2dnUVZ_gudnZ2d@earthlink.com>
Message-ID: <1210258455.4676.1252105925@webmail.messagingengine.com>

Dennis,

> I was a touch bored in the last hour at work today so...

Thank you!!

Malcolm


From mathieu.prevot at gmail.com  Wed May 28 07:40:48 2008
From: mathieu.prevot at gmail.com (Mathieu Prevot)
Date: Wed, 28 May 2008 13:40:48 +0200
Subject: Flash Decoder
In-Reply-To: <6a4rtbF35ut5sU1@mid.uni-berlin.de>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
Message-ID: <3e473cc60805280440k7156b74cla6342419359441cd@mail.gmail.com>

2008/5/28 Diez B. Roggisch <deets at nospam.web.de>:
> Ankit wrote:
>
>> Hi everyone,i wanted to build a flash decoder using python can
>> somebody tell me which library to use and what steps should i follow
>> to make a flash(video) decoder?By a decoder i mean that i need to
>> display all the pixel values of each frame.Waiting for your replies.
>
> Check out libffmpeg. It should be accessible using python by various means,
> including gstreamer or ctypes.
>
> This is however a rather advanced topic.
>
> Diez

I think you might want make an ffmpeg/libffmpeg python wrap. It could
be really useful, and faster than a pure python decoder. Even for fun.

Cheers
Mathieu


From christof.ecker at googlemail.com  Fri May 23 04:31:41 2008
From: christof.ecker at googlemail.com (christof)
Date: Fri, 23 May 2008 01:31:41 -0700 (PDT)
Subject: KeyError in pickle
Message-ID: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com>

Hi,

I am using pickle/unpickle to let my program save its documents to
disk. While this it worked stable for a long time, one of my users now
complained, that he had a file which can't be loaded.

The traceback is:

    File "pickle.pyo", line 1374, in loads
    File "pickle.pyo", line 858, in load
KeyError: 'A'


Does anybody know this problem. How this can happen and how can I
avoid it?

Thanks,
Christof


From ptmcg at austin.rr.com  Tue May 13 09:58:17 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 13 May 2008 06:58:17 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>

On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Don't let yourself be irritated by castironpi
>
> I'm not the sort to get irritated by anyone. ?There is value in all
> interaction.

Not this interaction, I'm afraid.  What irritates *me* about
castironpi is that he uses a chatterbot to clutter up the threads
here.  If you go back to his postings from a year ago (and selected
ones since), his comments are coherent and sensible.  These rambling
stream-of-consciousness rants about t.v.'s and coffee are (I guess)
his idea of a joke.  But they are certainly not worth your time in
trying to respond to them.

-- Paul


From allendowney at gmail.com  Thu May 29 12:07:01 2008
From: allendowney at gmail.com (allendowney at gmail.com)
Date: Thu, 29 May 2008 09:07:01 -0700 (PDT)
Subject: should I put old or new style classes in my book?
Message-ID: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>

Hi All,

I am working on a revised edition of How To Think Like a Computer
Scientist,
which is going to be called Think Python.  It will be published by
Cambridge
University Press, but there will still be a free version under the GNU
FDL.

You can see the latest version at thinkpython.com; I am revising now,
so
I welcome all comments, suggestions, corrections, etc.

Anyway, I am posting to ask about the current status of new style
classes.
I am planning to present only one style in the book, because the
differences
between them don't matter for anything I am doing in the book.

The current edition of the book presents old style classes.  I am
considering
switching to new style classes on the assumption that this should be
the default
choice for new programs.  The drawback is that a lot of the online
documentation
still uses old style classes.

Thanks for any guidance you can provide.

Cheers,
Allen



From tjreedy at udel.edu  Wed May 14 12:58:12 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 12:58:12 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
Message-ID: <g0f5n0$939$1@ger.gmane.org>


"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
| I also recommend Gmane which provides a free news server for most mailing
| lists: mailing lists are a lot more manageable when gatewayed into a news
| server. If you just want to access comp.lang.python I think you'll find 
the
| mailing list to which it is connected is available for free on Gmane.

gmane.comp.python.general

which is where I am answering this from.  Works great. 





From kyosohma at gmail.com  Thu May  1 12:26:38 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 09:26:38 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <a866c7f5-9429-4b28-b68c-b4ff6763072a@x41g2000hsb.googlegroups.com>

On May 1, 10:55?am, globalrev <skanem... at yahoo.se> wrote:
> im doing this :http://www.learningpython.com/2006/03/12/creating-a-game-in-python-us...
>
> and when closing the program the window stays up and doesnt respond. i
> tried adding this:http://www.pygame.org/wiki/FrequentlyAskedQuestions
>
> bu it doesnt work, or maybe im doing it wrong.
>
> heres the code without the added tutorial exit:
>
> import os, sys
> import pygame
> from pygame.locals import *
>
> if not pygame.font: print 'Warning, fonts disabled'
> if not pygame.mixer: print 'Warning, sound disabled'
>
> class PyManMain:
> ? ? """The Main PyMan Class - This class handles the main
> ? ? initialization and creating of the Game."""
>
> ? ? def __init__(self, width=640,height=480):
> ? ? ? ? """Initialize"""
> ? ? ? ? """Initialize PyGame"""
> ? ? ? ? pygame.init()
> ? ? ? ? """Set the window Size"""
> ? ? ? ? self.width = width
> ? ? ? ? self.height = height
> ? ? ? ? """Create the Screen"""
> ? ? ? ? self.screen = pygame.display.set_mode((self.width
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?, self.height))
>
> ? ? def MainLoop(self):
> ? ? ? ? """This is the Main Loop of the Game"""
> ? ? ? ? while 1:
> ? ? ? ? ? ? for event in pygame.event.get():
> ? ? ? ? ? ? ? ? if event.type == pygame.QUIT:
> ? ? ? ? ? ? ? ? ? ? sys.exit()
>
> class Snake(pygame.sprite.Sprite):
> ? ? """This is our snake that will move around the screen"""
>
> ? ? def __init__(self):
> ? ? ? ? pygame.sprite.Sprite.__init__(self)
> ? ? ? ? self.image, self.rect = load_image('snake.png',-1)
> ? ? ? ? self.pellets = 0
>
> if __name__ == "__main__":
> ? ? MainWindow = PyManMain()
> ? ? MainWindow.MainLoop()

I think the issue is that you're running it from within IDLE. It looks
like pyGame's event loop and Tkinter's event loop interfere with each
other. If you run the scripts from the command line, it works.

Mike


From straton at lampsacos.demon.co.uk  Sat May 17 21:24:49 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 02:24:49 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0fbdf$jp$1@aioe.org>
References: <g0fbdf$jp$1@aioe.org>
Message-ID: <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>

As others have said, PIL has the 'histogram' method to do most of the 
work. However, as histogram works on each band separately, you have
a bit of preliminary programming first to combine them.

The ImageChops darker method is one easy-to-understand way (done twice),
but there are lots of alternatives, I am sure.


# ------------------------------------

import Image
import ImageChops

Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
R,G,B = Im.split()

Result=ImageChops.darker(R,G)
Result=ImageChops.darker(Result,B)

WhiteArea=Result.histogram()[0]
TotalArea=Im.size[0] * Im.size[1]
PercentageWhite = (WhiteArea * 100.0)/TotalArea





Poppy wrote:
> I've put together some code to demonstrate what my goal is though looping 
> pixel by pixel it's rather slow.
> 
> import Image
> 
> def check_whitespace():
>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> 
>     size = im.size
> 
>     i = 0
>     whitePixCount = 0
>     while i in range(size[1]):
>         j = 0
>         while j in range(size[0]):
>             p1 = im.getpixel((j,i))
>             if p1 == (255, 255, 255):
>                 whitePixCount = whitePixCount + 1
>                 if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
> 1404) / 4) 25%
>                     return "image no good"
>             j = j + 1
>         i = i + 1
> 
>     print whitePixCount
> 
>     return "image is good"
> 
> print check_whitespace()
> 
> 
> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>> I need to write a program to examine images (JPG) and determine how much 
>> area is whitespace. We need to throw a returned image out if too much of it 
>> is whitespace from the dataset we're working with. I've been examining the 
>> Python Image Library and can not determine if it offers the needed 
>> functionality. Does anyone have suggestions of other image libraries I 
>> should be looking at it, or if PIL can do what I need?
>>
> 
> 


From arnlen at mac.com  Thu May  1 08:15:00 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 14:15:00 +0200
Subject: Photo gallery software
Message-ID: <0001HW.C43F80E40094984AB01AD9AF@news.individual.de>

I've searching for some software that would allow me to present my photos on 
the web (I'm not interested a software that generates static pages that I 
upload) and there are quite a few, see for example 
<http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
haven't managed to find one that I like - Gallery 2 is close.

So I've started to see if there is one that is based python (PHP isn't really 
"my language") but when I search on Google almost the only thing I find are 
photo galleries of snakes (to be honest I didn't know that people were *that* 
interested in pythons).

Do any anyone know if there exists photo gallery software written in Python?

I've found
<http://www.amk.ca/python/code/gallery>
<http://www.developer.com/lang/other/article.php/3734416>



From __peter__ at web.de  Tue May 20 02:40:06 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 08:40:06 +0200
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
	<12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>
Message-ID: <g0tro7$crq$03$1@news.t-online.com>

seanacais wrote:

> I had the Tkinter import as
> 
> from Tkinter import * but I changed it to
> 
> import Tkinter as tk
> 
> and modified the creation of the root object to
> 
> root=tk.Tk()
> 
> I then had to change every instance of Menu, Label,
> Button, and all Tkinter elements to be prefaced by
> tk.  (so Button became tk.Button).  That kind of makes
> sense to me.
> 
> However even after specifying StringVar is a tk type

You misunderstood. There is no such thing as a "tk type". 
Whether you use 

from Tkinter import * 

or

import Tkinter as tk

is irrelevant for the problem at hand.
 
> def initOPValues(self, OPname, dname):
> 
> OPDefaults = {
> 'Vval'  : 0,
> 'Ival'  : 0,
> 'Otemp' : 0
> }
> 
> dname = dict((d,tk.StringVar()) for d in OPDefaults)
> for d in OPDefaults:
> dname[d].set(OPDefaults[d])
> 
> 
> I still get a very similar error message

You have to ensure that the lines

from Tkinter import *
root = Tk()

are *executed* before the line

dname = dict((d, StringVar()) for d in OPDefaults)

While I prefer the alternative 

import Tkinter as tk
root = tk.Tk()
# ...
dname = dict((d, tk.StringVar()) for d in OPDefaults)

this is just a matter of style.

Peter

PS: If you still can't fix your script, please post it completely or,
better, a small self-contained (runnable) script showing the same problem


From castironpi at gmail.com  Fri May 16 09:30:18 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:30:18 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
Message-ID: <46f3de71-0152-4926-9e09-9b4046755fb4@k13g2000hse.googlegroups.com>

On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
>
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Kay Schluehr a ?crit :
>
> > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > >> Hello all,
>
> > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > >> It appeared to be the following:
>
> > >> class A(object):
> > >> ? ? pass
>
> > >> print min(1.0, A())
>
> > >> which is accepted by Python even though the A() object is not numerical in
> > >> nature.
>
> > >> The cause of this behavior seems to be the compare operation of the object
> > >> class.
>
> > >> Is there a way to disable this behavior in Python (other than deriving a new
> > >> 'object-like' class that doesn't do comparisons?)
>
> > > Are you sure you don't want to use a statically typed language that
> > > captures all type errors just by inspecting your source code?
>
> > This is not necessarily a static vs dynamic typing problem. The
> > following code will raise a TypeError for very good reasons:
>
> > ? ? print 1.0 + A()- Hide quoted text -
>
> > - Show quoted text -
>
> I question the real-world examples of coercion, casting, and
> upcasting. ?C insists that defining by operator, which may or may not
> relate to system, is the only legal move. ?I doubt operator+ is well-
> defined on non-ideal structures. ?Rationals are not floats, but system
> got checked. ?Define concurrency.- Hide quoted text -
>
> - Show quoted text -

The computer will have to learn knowledge at a distributed real-time
rate.


From kw at codebykevin.com  Sat May 10 12:02:11 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 12:02:11 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.905.1210434531.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>	<mailman.902.1210433160.12834.python-list@python.org>	<4825C265.90106@codebykevin.com>
	<mailman.905.1210434531.12834.python-list@python.org>
Message-ID: <4825C703.8070206@codebykevin.com>

Guilherme Polo wrote:

> Thanks ;)
> And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

Excellent. I hope your effort is successful.
>
> Thanks for support it, and sorry for saying yours was incomplete.
> I wasn't trying to sell my version by doing that, was just trying to
> say there were some point on doing another wrapper. I also noticed
> that there is some problem in getting Martin Franklin to fill the
> contributors agreement, that was the second point on doing this
> wrapper.

No offense taken. Martin is pretty busy these days and doesn't have time 
to work on it further; frankly, I'm not sure I'd have time if a lot of 
changes were requested. So if your package proves to be the best, great! 
I'll switch over my own apps to it.

Good luck!

Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From kirk at daycos.com  Fri May 30 13:19:56 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 12:19:56 -0500
Subject: Calling instance methods from a decorator
Message-ID: <87d4n3n1z7.fsf@internal.daycos.com>

I'm trying to write a decorator that would do something like:

def trace(before, after):
    def middle(func):
        def inner(*args, **kwargs):
            func.im_self.debugfunction(before)
            result = func(*args, **kwargs)
            func.im_self.debugfunction(after)
            return result
        return inner
   return middle

class Foo(object):
    def __init__(self, myname):
        self.name = myname

    def debugfunction(self, message):
        print 'Instance %s says: %s' % (self.name, message)

    @trace('calling', 'finished')
    def bar(self, arg):
        print arg

>>> Foo('snake').bar(123)
Instance snake says: calling
123
Instance snake says: finished

The gotcha seems to be that there's no way to get to 'self' from within the
"inner" function, since func will only have the "normal" attributes:

>>> print dir(func)
['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name']

There's no nice im_self to bounce off of or anything.  I seem to be going
about this all wrong.  What's a good approach to get the desired effect?
-- 
Kirk Strauser
The Day Companies


From george.sakkis at gmail.com  Fri May  2 15:46:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 12:46:56 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org> 
	<481B27D9.3000107@behnel.de>
Message-ID: <eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>

On May 2, 10:40 am, Stefan Behnel <stefan... at behnel.de> wrote:
> mcse jung wrote:
> > Here is asample program that writes a program and then executes it.
> > Do you knowof a much simpler way of writing a program that writes a program?
>
> I'm not quite sure what you are trying to achieve here, but I bet there is a
> simpler way to do it than by generating a script. You might want to look into
> functions.
>
> http://docs.python.org/tut/node6.html#SECTION006600000000000000000

Seriously, this looks like a DailyWTF entry.

George


From znfmail-pythonlang at yahoo.com  Fri May 30 10:17:39 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Fri, 30 May 2008 10:17:39 -0400
Subject: convert string containing list to list (or tuple) type
References: <g1p15p$4jo$1@aioe.org>
Message-ID: <g1p2a7$8nc$1@aioe.org>

Arrgh. One of those days where I find an answer just after posting. I spend 
hours on the code below only to find I don't know how to use split to it's 
fullest.

>>> b.strip(",").split(",")
['I', 'G', 'AQ', 'ET', 'K', 'BF']

"Poppy" <znfmail-pythonlang at yahoo.com> wrote in message 
news:g1p15p$4jo$1 at aioe.org...
> I'm reading from a database a column that has a list of codes (comma 
> seperated). When I read in the list I have a single value, see code sample 
> below values for a, b, and c. These represent possible values in my 
> database. I need to loop through each value so I can expand my data from 
> this compressed view.
>
> My code below works and creates my desired output but I believe there must 
> be a better way this is very messy. My messy function that I'd like to 
> replace is lst_codes(codes). Any alternative suggestions?
>
> this is what I begin with
> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
> this is what I want (lists or tuples are fine)
> ['P']
> ['I', 'G', 'AQ', 'ET', 'K', 'BF']
> ['DZ']
>
>
> def lst_codes(codes):
>    """ turn a string of comma seperated codes into a real list object """
>    i = 0
>    lstD = []
>    while i < len(codes):
>        a = codes[i]
>        b = ","
>        if (i + 1) < len(codes):
>            b = codes[i + 1]
>            i = i + 1
>        else:
>            b = ","
>
>        if b <> ",":
>            lstD.append(a + b)
>            i = i + 2
>        else:
>            lstD.append(a)
>            i = i + 1
>    return lstD
>
>
> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
>
> for ea in (a,b,c):
>    print lst_codes(ea.strip(","))
>
> 




From cocobear.cn at gmail.com  Sat May  3 07:17:36 2008
From: cocobear.cn at gmail.com (cocobear)
Date: Sat, 3 May 2008 04:17:36 -0700 (PDT)
Subject: about bsddb module
Message-ID: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>

How to deal with multiple databases in an file. I want to get the
content of several databases.

it's the code I wrote:

[cocobear at cocobear ~]$ python
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import bsddb
>>> import os
>>> import time
>>>
>>> db_file = 'native.db'
>>> db = bsddb.db.DB()
>>> db.open(db_file,bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>>> dbs = db.keys()
>>> db.open(db_file,dbs[0],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>>> db.keys()
['\x01\x00\x00\x00', '\x02\x00\x00\x00', '\x03\x00\x00\x00',
'\x04\x00\x00\x00', '\x05\x00\x00\x00']
>>> db.open(db_file,dbs[1],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)


the program stop here.


From miller.paul.w at gmail.com  Sun May 25 20:08:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 17:08:39 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>

On May 25, 2:37?am, notnorweg... at yahoo.se wrote:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
>
> so obv i want fast insert. i want to delete duplicates too.
>
> which datastructure is best for this?

I think you ought to re-examine your requirements.  Why do you need to
store in alphabetical order?  (And, what does that even mean for a web
site?)  Personally, I'd probably just use a simple dict for in-memory
storage, and use a database for external storage.  In that case,
adding a site or page to the "seen" structure is a simple matter of
doing

urls[key] = url

Dicts are basically hash tables, so this insert is amortized O(1) and
you get dupe-detection for free, provided the key is unique.  If you
want to display the contents in alphabetical order by "key," you can
do this by:

keyz = sorted (urls.keys())
for key in keyz:
    print urls[key]

The problem with this is that you pay the sorting cost every time you
want to display the results.  If that is a problem, you can maintain
an in-memory index (and rely on the database to do it for you in the
case of externally stored results).


From darcy at druid.net  Thu May  8 08:33:23 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 8 May 2008 08:33:23 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <4822E485.4040107@aim.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
	<4822E485.4040107@aim.com>
Message-ID: <20080508083323.06a74930.darcy@druid.net>

On Thu, 08 May 2008 07:31:17 -0400
Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
> This is sort of related, but I'm wondering what is different between 
> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
> thing, since an absolute path is not specified, find 'python' from the 
> PATH environment,  I don't really know.

Well, I know what happened when I tried it.  What happened when you
tried it?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From hdante at gmail.com  Thu May 22 01:33:24 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 22:33:24 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com> 
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>
Message-ID: <ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com>

On May 22, 1:41?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
>
> > > ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> > > ?1e16-2 == 0x1.1c37937e07fffp+53
> > > ?1e16 == 0x1.1c37937e08p+53
>
> > > ?(that is, the hex representation ends with "7fff", then goes to
> > > "8000").
>
> > > ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> > > This is not a bug, it's a feature.
>
> > ?I didn't answer your question. :-/
>
> > ?Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
> > by default. So that's strange.
>
> > ?The following code compiled with gcc 4.2 (without optimization) gives
> > the same result:
>
> > #include <stdio.h>
>
> > int main (void)
> > {
> > ? ? ? ? double a;
>
> > ? ? ? ? while(1) {
> > ? ? ? ? ? ? ? ? scanf("%lg", &a);
> > ? ? ? ? ? ? ? ? printf("%a\n", a);
> > ? ? ? ? ? ? ? ? printf("%a\n", a + 0.999);
> > ? ? ? ? ? ? ? ? printf("%a\n", a + 0.9999);
> > ? ? ? ? }
>
> > }
>
> ?However, compiling it with "-mfpmath=sse -msse2" it works. (it
> doesn't work with -msse either).

 Finally (and the answer is obvious). 387 breaks the standards and
doesn't use IEEE double precision when requested to do so.

 It reads the 64-bit double and converts it to a 80-bit long double.
In this case, 1e16-2 + 0.9999 == 1e16-1. When requested by the printf
call, this 80-bit number (1e16-1) is converted to a double, which
happens to be 1e16.


From timj at tolisgroup.com  Mon May  5 16:47:39 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 13:47:39 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
	<mailman.614.1210016810.12834.python-list@python.org>
Message-ID: <2aead6d7-9048-42e7-b1ca-9f8f9110e258@b9g2000prh.googlegroups.com>

On May 5, 1:46?pm, Christian Heimes <li... at cheimes.de> wrote:
> brucoder schrieb:
>
> > Any pointers? ?A prerequisite that I might be missing? ?The source is
> > the Python-2.5.2.tar.gz from the Python.org site.
>
> The tar.gz doesn't contain the dependencies like the bsddb files or
> sqlite3, bzip2 and more. You have to download and unpack the correct
> versions into the correct folder. Please read PCbuild/readme.txt

I had read that, but I misunderstood that not all components must be
built.  Since I don't need that functionality, I now see that I can
simply exclude it from my lib and exe builds.

Thanks,
Tim


From bj_666 at gmx.net  Sun May 11 04:46:07 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 May 2008 08:46:07 GMT
Subject: Some error messages in Python are ugly
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <68nq2fF2si386U1@mid.uni-berlin.de>

On Sun, 11 May 2008 01:10:19 -0700, wxPythoner wrote:

> This really looks ugly for an error message:
> 
> [1]+  Stopped                 python

It's neither an error message nor does it come from Python.  It's a
message from your shell about job control.  Seems you have stopped the
running process, which happens to be Python, by pressing <ctrl>+<z> or
<ctrl>-<y> for example.

> Please explain to me the role of the '+' sign.

Refer to the manual of your shell.  I guess it says, that the stopped
process was/is the current job, i.e. the one commands like ``fg`` or
``bg`` operate on if you leave out the argument.

Ciao,
	Marc 'BlackJack' Rintsch


From mnikhil at gmail.com  Wed May 14 14:54:20 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:24:20 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <g0fcgs$g59$3@registered.motzarella.org>

Arnaud Delobelle wrote:

> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 

I guess you meant to say :

  for lineno, line in enumerate(fp):
      print "line number: " + lineno + ": " + line.rstrip()

Thanks.


From sjdevnull at yahoo.com  Tue May 20 14:19:27 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Tue, 20 May 2008 11:19:27 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
Message-ID: <94ce5e02-0185-4513-9bc1-7ec483be57aa@y21g2000hsf.googlegroups.com>

On May 20, 12:14 am, Tim Roberts <t... at probo.com> wrote:
> Monica Leko <monica.l... at gmail.com> wrote:
>
> >I have a specific format and I need binary representation.  Does
> >Python have some built-in function which will, for instance, represent
> >number 15 in exactly 10 bits?
>
> For the record, I'd like to point out that even C cannot do this.  You need
> to use shifting and masking to produce a stream of 8-bit bytes, or to
> extract your values from a stream of 8-bit bytes.

Technically specifying 8-bits isn't quite accurate, as C allows for 9-
bit bytes and other variations depending on the architecture.  But
that may be overly pedantic unless you have a PDP-10 laying around
that you're writing C code on or something like that.


From pataphor at gmail.com  Sun May 18 12:18:34 2008
From: pataphor at gmail.com (pataphor)
Date: Sun, 18 May 2008 18:18:34 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
Message-ID: <MPG.229a753256adf097989687@nntp.aioe.org>

In article <dtb03495i4isn8oi89i8fpe7p8dif7cct6 at 4ax.com>, 
dullrich at sprynet.com says...

> Is there some reason that would be better? It would make a lot
> of the code more complicated. Ok, it would require only one
> bit of added code, I suppose, but I don't see the plus side.

The plus side is you give up an untenable position :-) And to address an 
item in a matrix costs two lookups, row and column, while an array needs 
only one. 

P.


From gnewsg at gmail.com  Fri May  2 15:30:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 12:30:03 -0700 (PDT)
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <1cdf54b3-ceda-4e06-8be1-9abaa20d9921@w74g2000hsh.googlegroups.com>

On 2 Mag, 21:20, Brendan Miller <catph... at catphive.net> wrote:
> Hi,
>
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
>
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
>
> Is there a portable /dev/null somewhere in the standard library?
>
> Thanks,
> Brendan

I don't think so. You could define a dummy class emulating the file-
object API. Something like:

class NullDevice:
    "A writeable object that writes to nowhere -- like /dev/null."
    def write(self, s):
        pass

    closed = False
    def close(self):
        self.closed = True


--- Giampaolo
http://code.google.com/p/pyftpdlib


From tarun.kap at gmail.com  Mon May  5 18:39:18 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 15:39:18 -0700 (PDT)
Subject: SSL through python. possible ?
References: <mailman.613.1210015987.12834.python-list@python.org>
Message-ID: <18f86ec1-8190-4f58-8895-5c0bdd1aa429@l42g2000hsc.googlegroups.com>

On May 5, 2:32 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 5 May 2008 11:11:19 -0700 (PDT),TkNeo<tarun.... at gmail.com> wrote:
> >On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> >> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>
> >> > Mike Driscoll wrote:
> >> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
> >> > >> I need to do SSL file transfer using python? Is there a library i can
> >> > >> use ?
>
> >> > >http://sandbox.rulemaker.net/ngps/m2/
>
> >> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> >> > --
> >> >   Heikki Toivonen
>
> >> Whoops...I just went with the first link Google gave me. The link I
> >> gave doesn't mention that the project has moved. Looks like the one
> >> you link to is the 9th link on my Google search using the terms:
> >> "python m2crypto".
>
> >> Sorry if I spread misinformation though.
>
> >> Mike
>
> >ok i have tried around a lot but no luck. I think M2Crypto is my best
> >option except it requires a minimum of python 2.4 which i don't have.
>
> >What i am trying to do is to do an FTP transfer that uses SSL
> >(username, password authentication) and not a certificate file. The
> >few example i have found of the Openssl module use a certificate for
> >authentication unlike what i want to do.
>
> >Anyone has any ideas ?
>
> FWIW, though not as complete as an OpenSSL wrapper as M2Crypto, pyOpenSSL
> works with Python 2.3.
>
> As far as the details of the authentication that you are attempting go, it
> sounds like you want to use ephemeral DH key exchange.  This is something
> which is on my list to figure out. ;)
>
> Jean-Paul

Jean, from my limited knowledge, there are usually 3 modes of
authentication:
1. certificate exchange
2. key exchange
3. username/password

#3 is what i want to use.



From beema.shafreen at gmail.com  Wed May 21 05:23:51 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Wed, 21 May 2008 14:53:51 +0530
Subject: Typeerror
In-Reply-To: <9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
	<mailman.1414.1211360353.12834.python-list@python.org>
	<9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>
Message-ID: <aa405c1f0805210223v4c4fbd03x563db0c0d4c5a457@mail.gmail.com>

Thanks a lot i had solved the problem

On Wed, May 21, 2008 at 2:32 PM, <jonbutler88 at googlemail.com> wrote:

> On May 21, 9:58 am, Freaky Chris <angry-ch... at hotmail.com> wrote:
> > This is a simple error, you are passing the variable res as an interger
> to
> > use for a slice when what ever you are storing in res isn't an integer.
> >
> > Chris
> >
> >
> >
> > Beema shafreen wrote:
> >
> > > Hi all,
> > > I getting the following error when i run my scirpt ,
> > > can somebody help me regarding this to solve the type error problem
> >
> > > Traceback (most recent call last):
> > >   File "get_one_prt_pep.py", line 59, in ?
> > >     if len(data[res])<=1:
> > > TypeError: string indices must be integers
> >
> > > --
> > > Beema Shafreen
> >
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
> >
> > --
> > View this message in context:
> http://www.nabble.com/Typeerror-tp17358659p17358932.html
> > Sent from the Python - python-list mailing list archive at Nabble.com.
>
> If it is an integer, but stored as a string you can use:
>
> if len(data[int(res)])<=1
>
> its not pretty but it should sort out the type errors
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Beema Shafreen
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From kamhung.soh at gmail.com  Tue May 27 01:59:48 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 27 May 2008 15:59:48 +1000
Subject: Hungarian Notation
In-Reply-To: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <g1g80l$65r$1@ger.gmane.org>

inhahe wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian 
> notation in Python?  Not that I plan to name all my variables with hungarian 
> notation, but just for when it's appropriate.

I used simple Hungarian notation when I started programming in Python 
(e.g. "s" for strings, "l" for lists, "d" for dictionaries).  As my 
programming style became more "Pythonic" and I chose better variable 
names, I stopped using Hungarian notation.

YMMV.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kd015b3257 at blueyonder.co.uk  Fri May  9 14:34:10 2008
From: kd015b3257 at blueyonder.co.uk (kdwyer)
Date: Fri, 09 May 2008 19:34:10 +0100
Subject: PyXml
Message-ID: <g026cv$6s5$1@ger.gmane.org>

Hello Everyone,

I've been looking into writing a utility to compare/analyse xml files, and
thought I'd have a look at PyXml, but the Sourceforge page says it's no
longer maintained.

Two questions:
What's the story with PyXml?  Is it stable/complete or has effort moved
elsewhere?

Can anyone recommend a Python validating parser that validates vs Xml
Schema?

Many thanks,

Kev



From tjreedy at udel.edu  Tue May 13 17:42:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:42:50 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F37@percello-sbs.percello.local>
Message-ID: <g0d20n$om3$1@ger.gmane.org>


"Ohad Frand" <ohad.frand at percello.com> wrote in message 
news:B9E129828E47994B9B95E1BAABC8868C0B8F37 at percello-sbs.percello.local...
| Hi
| Thanks a lot for your reply
| I think the main uses for it is to study the language and to see that I
| didn't miss anything else or that something is changed from one version
| to another.

The language manual lists and explains all the keywords.
The library manual lists and explains all the builtin functions, classes, 
and other objects and, by now, everying in the standard library. 
Experimenting with code while reading is definitely a good idea too.





From amit.uttam at gmail.com  Wed May 21 18:59:39 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Wed, 21 May 2008 15:59:39 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
	<mailman.1366.1211238396.12834.python-list@python.org>
Message-ID: <4751db1b-9e09-4c70-9372-5ac96d7437aa@u12g2000prd.googlegroups.com>

On May 19, 4:05 pm, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Tue, 20 May 2008 06:58:28 +1000, <amit.ut... at gmail.com> wrote:
> > On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> >> amit.ut... at gmail.com writes:
> >> > I've recently jumped big time into python and I'm working on a
> >> > software program for testing automation.
>
> >> Welcome, to both fields :-)
>
> > Thanks! I am having a great time learning and coding in python. It's
> > an amazing programming language.
>
> >> > I had a question about proper logging of output. What I would like
> >> > is:
>
> >> >  1. a function syslog (to log output to log file only)
> >> >  2. a function stdout (to log output to stdout only)
> >> >  3. a function sslog (to log output to both log and stdout)
>
> >> > Right now I am using StandOut module
>
> >> Have you investigated the 'logging' module in the Python standard
> >> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> >> to meet your listed requirements, without need of external
> >> dependencies.
>
> > Hmm..Yeah I didn't realize python had its own standard logging
> > facility. I took a look at it and it seems to do the job. However, the
> > output seems to be syslog style output. In the program I am writing,
> > the log file stores all the output of the commands being run (e.g. tcl
> > scripts, etc). Will this be possible using the built in python logging
> > module?
>
> > Thanks,
> > Amit
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> You can define the format of the log output in basicConfig(), for example:
>
>  from logging import basicConfig, error, info, INFO
> ...
>    basicConfig(
>        datefmt='%Y%m%d_T%H%M%S',
>        filemode='a',
>        filename=LOG_PATH,
>        format='%(asctime)s,%(levelname)s,%(message)s',
>        level=INFO
>    )
>
> If you want to log the output of other commands in your log file, you can
> connect a pipe to that command.  Maybe look at "subprocess -- Subprocess
> management" inhttp://docs.python.org/lib/module-subprocess.html
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

Thanks for the reply.

Yeah I am using the subprocess module and I am able to capture the
output and save it to log a file. However, looking at module-logging
the output format is like syslog. What I want is my own custom log
file format. I wrote a separate module containing all the functions
for the logging but I can't seem to use it globally. How does one use
global variables in python?

Code:

# log.py - A base class that provides logging functionality.
#
# Copyright 2008 Amit Uttamchandani <auttamchandani at canoga.com>
#

import os
import sys

logfile = None
global logfile

def createLogFile(filename):
    '''Opens a file for logging.'''
    try:
        logfile = open(filename, 'w')
    except IOError:
        print 'Error: Cannot create log file: %s' %
os.abspath(logfile)
        sys.exit(0)

def stdlog(logstr):
    '''Writes output to stdout.'''
    sys.stdout.write(logstr)

def syslog(logstr):
    '''Writes output to logfile.'''
    logfile.write(logstr)

def agglog(logstr):
    '''Aggregate output of logstr.'''
    syslog(logstr)
    stdlog(logstr)

def closeLogFile():
    '''Closes the log file.'''
    logfile.close()


Thanks,
Amit


From clajo04 at mac.com  Thu May 29 14:45:53 2008
From: clajo04 at mac.com (John Clark)
Date: Thu, 29 May 2008 14:45:53 -0400
Subject: NYC Python User Group Meeting Announcement....
Message-ID: <00b601c8c1bc$3a6a0c20$af3e2460$@com>

Greetings!

The next New York City Python Users Group meeting is planned for June 17th, 
6:30pm at Daylife Inc. at 444 Broadway (between Howard St. and Grand St.) on
the 5th Floor. We welcome all those in the NYC area who are interested in 
Python to attend.

More information can be found on the users group wiki page:

http://www.nycpython.org

Hope to see you there!

-John Clark




From skanemupp at yahoo.se  Thu May 15 09:07:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 06:07:06 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<55de611d-e484-4373-a485-35925a68919c@8g2000hse.googlegroups.com>
Message-ID: <e17e3743-597a-4ff3-b6ac-9ca2949488df@m36g2000hse.googlegroups.com>

On 15 Maj, 14:40, George Sakkis <george.sak... at gmail.com> wrote:
> On May 15, 8:27 am, globalrev <skanem... at yahoo.se> wrote:
>
> > i have a big collection of .txt files that i want to open and parse to
> > extract information.
>
> > is there a library for this or maybe even built in?
>
> This has a lot to do with how well-structured are your files and what
> kind of information you hope to extract (shallow or deep). NLTK might
> be a good starting point:http://nltk.sourceforge.net/
>
> George

superstructured, 10K+files, all look the same.


From emailamit at gmail.com  Fri May 23 20:33:09 2008
From: emailamit at gmail.com (Amit Gupta)
Date: Fri, 23 May 2008 17:33:09 -0700 (PDT)
Subject: would this be called bug?
Message-ID: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>

The code is attached below. Basically I am taking a substring of
variable m, and using "buffer" instead of slicing.

However, the application of int on that buffer start correctly from
the offset, but it scans all the way to the end, instead of stopping
at the length of the buffer.

It works however, if I apply str function to output of buffer
function.

-A


(Pdb) m = "AA1234AA"
(Pdb) x = buffer(m, 2, 4)
(Pdb) x
<read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
(Pdb) int(x)
*** ValueError: invalid literal for int() with base 10: '1234AA'
(Pdb) m = "AA1234AA"
(Pdb) m = "AA1234"
(Pdb) x = buffer(m, 2, 4)
(Pdb) int(x)
1234
(Pdb)


From castironpi at gmail.com  Tue May  6 23:46:28 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 20:46:28 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org>
Message-ID: <d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>

On May 6, 4:43?pm, pyt... at bdurham.com wrote:
> I need to generate multi-level incrementing labels for an
> outline/hierarchy where the string for each level of a label is based on
> an incrementing sequence like 1, 2, 3 or A, B, C, or even I, II, III.
> For simplicity, assume that each level's label segment is separated by a
> period (".").
>
> I will pass an integer level (1 ... N) to this function/object so that
> level specific counters get reset when the level changes.
>
> I will use this function/object to generate output like:
>
> Label ? ? Level
> I. ? ? ? ?1
> I.A. ? ? ?2
> I.B. ? ? ?2
> I.C. ? ? ?2
> I.D. ? ? ?2
> I.D.1. ? ?3
> I.D.2. ? ?3
> I.D.3. ? ?3
> I.E. ? ? ?2
> II. ? ? ? 1
>
> Is there a pre-built class for generating label sequences like this?
> (I'm not sure what I would use as search terms to google for such a
> class).
>
> While this sounds like a simple/fun class to write, I think it could
> quickly get complicated when one factors in parsing rules for each
> level's label type, separators, and error checking. If there's an
> existing, road tested class (with unit tests) that does this, I would
> rather avoid re-inventing/re-testing the wheel.
>
> Thanks,
> Malcolm

You've inquired about syntax here.

(simulated)

>>> a.next( )
I.
>>> a.throw( in )
I.A.
>>> a.next( )
I.B.
>>> a.next( )
I.C.
>>> a.throw( out )
II.

I will implement the object (the term is  "generator"), but you have
to count on two things: I can, and I'll check the newsgroup (i.e. bank
on the spare time of others).  You're invited to reply with any and
all interest.  Personally, the offer expires, but I'm not the only one
with the skill.  (Stay tuned.)

(The trick to generators is "dis"inventing wheels.)

Is the formulation proposed satisfactory to you?

Would you prefer to yield a sequence of marks, as a further option, as
follows?  (As opposed to the rejoined string.)

(simulated)

>>> a.next( )
( "I", )
>>> a.throw( in )
( "I", "A" )
>>> a.next( )
( "I", "B" )
>>> a.next( )
( "I", "C" )
>>> a.throw( out )
( "II", )

At this point in conception, my proposal has -not- met your criterion
of:

> I will pass an integer level (1 ... N) to this function/object so that
> level specific counters get reset when the level changes.

but does proceed stepwise through my sequence.

(Further I am interested in other means of display of the information
you're presenting in the outline; feel free to brainstorm on this
group.)

Library: Python allows you to join sequences of strings simply:

>>> ".".join( ( "I", "A", "1", "iii" ) )
'I.A.1.iii'

But customization could make the return a multi-liner.  Yes it's free,
what you've asked.

The implementation is subject to taste in one of two ways, whether
you're holding a mutable sequence of generators (per se), or just one,
but for beggars can't be choosers, the free code only comes with one.
If you will want to "go back and insert", generators are the -wrong-
solution (prop check).


From paolovictor at gmail.com  Sat May 24 04:45:59 2008
From: paolovictor at gmail.com (Paolo Victor)
Date: Sat, 24 May 2008 01:45:59 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com> 
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com> 
	<87lk20telh.fsf@physik.rwth-aachen.de>
Message-ID: <92ba5408-a0ca-4070-83fb-37eabe667603@m73g2000hsh.googlegroups.com>

I love it when a troll tries to make his/hers/its point with a vague,
biased assumption:

"I mean, it's not that slow - wait, I guess it's slower, because I...
I think so! Yeah! It's slow! At least it feels like it..."

It's all about choosing the right tool. If you think Python doesn't
suit your needs, you really should look for something that does,
instead of wasting your (and our) time with "guesses" and "feelings".

Research/develop/execute a benchmark. Gather and analyze relevant
data. Make a real contribution.

Peace,
Paolo

On May 24, 3:12 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
wrote:
> Hall?chen!
>
> cm_gui writes:
> > [...]
>
> > if python is such a good programming/scripting language,
> > why can't they build a faster interpreter/compiler engine?
> > and beat php and zend.
> > to the python team, rebuild your interpreter!
>
> > torontolife.com is slow.
>
> For me, torontolife.com is exactly as fast as Wikipedia.
>
> Tsch?,
> Torsten.
>
> --
> Torsten Bronger, aquisgrana, europa vetus
>                                       Jabber ID: bron... at jabber.org
>                (Seehttp://ime.webhop.orgfor further contact info.)



From deets at nospam.web.de  Tue May 20 09:51:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:51:17 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
Message-ID: <69g3bmF31ttuuU3@mid.uni-berlin.de>

bearophileHUGS at lycos.com wrote:

> John Salerno:
>> What does everyone think about this?
> 
> The Example 2 builds a list, that is then thrown away. It's just a
> waste of memory (and time).

No, it doesn't. It uses append because it refers to itself in the
if-expression. So the append(c) is needed - and thus the assignment
possible but essentially useless.

Diez


From efurman at admailinc.com  Tue May  6 12:36:40 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 06 May 2008 08:36:40 -0800
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au>	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
Message-ID: <48208918.6090807@admailinc.com>

Banibrata Dutta wrote:

>On 5/6/08, andrej.panjkov at climatechange.qld.gov.au
><andrej.panjkov at climatechange.qld.gov.au> wrote:
>  
>
>>At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
>>other unixy OSes.
>>
>>We have python installed in a number of different places:
>>/bin/python
>>/usr/local/bin/python
>>/usr/bin/python
>>/opt/freeware/Python/Python-2.5.1/bin/python
>>~mataap/platform/python/python-2.5.1
>>
>>So I cannot assume a single location for python.  Nor for any other
>>tool, really.  Bash for example.  It may indeed be in /usr/bin on many
>>systems, on many others it is not.
>>
>>Note the version specific install points.  This allows us to switch
>>over easily to different versions, and keep older versions in case
>>they are needed.  We can test new versions before cutting over to them
>>operationally. (This matters for tools that are still changing, like
>>python or bash.)
>>
>>We use the very handy 'modules' package (not python modules, not
>>fortran modules) to adjust our paths and environment variables as
>>needed.
>>
>>Some of the install points are determined by policy, or historical
>>constraints, or hardware limits, or file system layout.
>>
>>Now it is true that it is easy to edit a single script to change the
>>hashbang line.  It is not easy to change several hundred scripts, on
>>different machines.  It is easy to adjust the environment to point to
>>the right python path, and have all your scripts pick it up
>>automatically.
>>    
>>
>
>Looks reasonable thing to do...
>
>  
>
>>Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>>    
>>
>
>So why not put symlink to Python over there on all machines, if we can
>put one (or env itself) there ?
>
A symlink directly to python (or whatever) would not help when testing 
version x.y.z, while still leaving version a.b.c in place for the other 
tools/scripts/programs to keep using.
--
Ethan
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From bruno.desthuilliers at gmail.com  Wed May 14 16:27:43 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:27:43 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
	<482a190b@news.mel.dft.com.au>
Message-ID: <654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>

On 14 mai, 00:41, John Machin <sjmac... at lexicon.net> wrote:
(snip)
> IIRC the idea was so that managers could write programs in English. It
> failed because nobody could write a parser that would handle something
> like "The bottom line is that the stakeholder group requires the
> situation going forward to be such as to facilitate the variable known
> as x to provide the same outcome when stimulated by dereferencing as the
> variable known as y".

John, I usually don't agree much with both what you say and how you
say it, but I must admit that this one is, well... just brillant !-)

(IOW: rofl, keyboard, and +1 QOTW)


From pavlovevidence at gmail.com  Sun May  4 02:29:17 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 3 May 2008 23:29:17 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
Message-ID: <8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>

On May 3, 7:44 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Alexander Schmolck wrote:
> > AlFire <spamgrinder.tryla... at ggmail.com> writes:
>
> >>> The threading module already has a function to return the number of Thread
> >>> objects currently alive.
>
> >> I have threads within threads - so it does not suit me :-(.
>
> > How about using a scalar numpy array? They are mutable, so I assume that x +=
> > 1 should be atomic.
>
> No NO NO! The only way to increment a variable in memory is through a
> three step process:

Yes, this will be atomic.  It's a pretty good idea, in fact.  The
underlying increment operation is protected by the GIL; it could be
three, forty, or a hundred steps and it'd be atomic at the Python
level.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:31:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:31:21 -0300
Subject: Writing elapsed time as a string
References: <481B67E5.7040507@googlemail.com>
Message-ID: <op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 02 May 2008 16:13:41 -0300, Simon Pickles <sipickles at googlemail.com> escribi?:

> I'm sorry if this has been asked a thousand (million) times.
>
> Is there a nifty pythonesque way to produce a string representing an
> elapsed time period, in terms of years, months, days, hours, mins, seconds?
>
> I am storing times in a MySQL db, and would love to be able to write the
> time elapsed between accesses of certain data. These are in seconds
> since the epoch, as produced by time.time()

Two options:

a) You can construct a datetime object with that info, using datetime.datetime.fromtimestamp()
(note that the MySQLdb module already returns datetime objects for timestamp columns in MySQL).
If you substract two datetime objects, you get a timedelta object, which stores info as whole days, seconds (fraction of day) and microseconds (fraction of second). If you can live with years having exactly 365 days and months having exactly 30 days (or up to 35!):

def timedelta_str(td):
     def plural(n):
         if n>1: return 's'
         return ''
     out = []
     y, d = divmod(td.days, 365)
     if y: out.append('%d year' % y + plural(y))
     m, d = divmod(d, 30)
     if m: out.append('%d month' % m + plural(m))
     if d: out.append('%d day' % d + plural(d))
     h, s = divmod(td.seconds, 60*60)
     if h: out.append('%d hour' % h +  + plural(h))
     m, s = divmod(s, 60)
     if m: out.append('%d min' % m + plural(m))
     if s: out.append('%d sec' % s + plural(s))
     return ' '.join(out)

py> from datetime import datetime
py> d1 = datetime(1992, 5, 11, 8, 23, 8, 612)
py> d2 = datetime.now()
py> print d1
1992-05-11 08:23:08.000612
py> print d2
2008-05-08 09:21:53.592000
py> print timedelta_str(d2-d1)
16 years 1 day 58 mins 45 secs

or b) Use the dateutil package <http://labix.org/python-dateutil>

> It is probable right in front of me in the docs but I am spinning off
> into outer space (mentally!)

Nope... showing time intervals as years,months,days... isn't trivial, because there are many special cases, and sometimes legal issues too. It's impossible to make everyone happy in this topic.

-- 
Gabriel Genellina



From hdante at gmail.com  Tue May  6 13:06:28 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 10:06:28 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <995582f9-754f-4f6e-857e-8156ea7b0b20@56g2000hsm.googlegroups.com>

On May 5, 3:43 pm, notbob <not... at nothome.com> wrote:
>
> ----------
>
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
>     print bruce, bruce
>
>
> ****ME****
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet?  I read another newb explanation here:http://www.codepedia.com

 That's right. Definitions only explain how things work. They are used
later.


> and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

 When you have a problem with your code, always post here the complete
code and a complete execution. For example:

 file myfile.py:
 --------------------------
 def myfirstfunction():
      abcde

 myfirstfunction()
 --------------------------

 execution:
 $ python myfile.py
 Traceback (most recent call last):
   File "myfile.py", line 4, in <module>
     myfirstfunction()
   File "myfile.py", line 2, in myfirstfunction
     print abcde
 NameError: global name 'abcde' is not defined
 ------------------------------------------------

 This way we can find out what's wrong (don't worry about the code
above, it's just an example)

> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

 "import" is very complex. For example, in my system, it looks for
files in all these places:

['', '/usr/bin', '/usr/lib/python25.zip', '/usr/lib/python2.5', '/usr/
lib/python2.5/plat-linux2', '/usr/lib/python2.5/lib-tk', '/usr/lib/
python2.5/lib-dynload', '/usr/local/lib/python2.5/site-packages', '/
usr/lib/python2.5/site-packages', '/usr/lib/python2.5/site-packages/
Numeric', '/usr/lib/python2.5/site-packages/PIL', '/usr/lib/python2.5/
site-packages/gst-0.10', '/var/lib/python-support/python2.5', '/usr/
lib/python2.5/site-packages/gtk-2.0', '/var/lib/python-support/
python2.5/gtk-2.0', '/usr/lib/python2.5/site-packages/wx-2.8-gtk2-
unicode', '/var/lib/python-support/python2.5/IPython/Extensions', '/
home/hdante/.ipython']

 Those are directories that it uses to find files. You tell import
just the base name of the script "chap03". Then it adds the ".py"
extension, looks in each directory in order, etc. Notice in the
directory list that the first entry is a blank: ''. It represents the
current directory. So, if you do:

 $ cd ~/pyth/chap03
 $ python
 >>> import chap03

 It will work as expected.

>
> In a function call, the value of the argument is assigned to the
> corresponding parameter in the function definition.  In effect, it is if
> bruce = 'Spam' is executed when print_twice('Spam')
> is called, bruce = 5 in print_twice(5), and
> bruce = 3.14159 in print_twice(3.14159)."
>
> ****ME****
> OK, I'm totally lost.  Neither the above or the other link works or make any
> sense at all.  Is the above print_twice(5), etc, supposed to work like the
> original print_twice(bruce) function (which still doesn't!), just with a

 Words that appear in a program, like, "bruce" are variables.
Variables are stamps. Bruce is a stamp. Here is bruce:

 /----------\
 |  bruce   |
 \----------/

 You can put the stamp in other things:


 /----------\  glued
 |  bruce   | ------> 42
 \----------/

 When you use a stamp, it returns what it's glued on:

 >>> bruce = 42  # glue a stamp
 >>> print bruce # use the stamp
 42

 When you call print_twice(42), first bruce glued to the value 42.
When you use bruce:

 print bruce, bruce

 The value 42 is retrieved and given to the "print" function.

 So, I can glue arbitrary things with bruce:

 >>> print_twice(5)
 5 5

 >>> print_twice(3.14)
 3.14 3.14

 etc.

 If you want to print "bruce bruce", then you need a special kind of
value, called a string:

 >>> print_twice('bruce')
 bruce bruce

 'bruce' is a string (notice the quotes). In this case bruce is glued
to 'bruce':

 /----------\  glued
 |  bruce   | ------> 'bruce'
 \----------/

 When you pass strings to "print", they appear the way they are
written.

 >>> print 'bruce'
 bruce
 >>> print_twice('bruce')
 bruce bruce


> different parameter?  Call me stupid, but I'd sure like to get past this.

 Stupid. Not really. :-) I'd rather say that the problem is the book.
The book is just another introduction to programming. There's no
special attempt to make the reader learn to think like a computer
scientist.

> How am I supposed to get the original def to work?  I've yet to figure out

 file myfile.py:
-------------------------------
def print_twice(bruce):
	print bruce, bruce

print_twice('bruce')
print_twice(2)
-------------------------------

execution:
-------------------------------
$ python myfile.py
bruce bruce
2 2


 Finally, you don't understand something, ask again.


From wojtek.gminick.walczak at gmail.com  Tue May  6 11:11:37 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 17:11:37 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <874p9belo6.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
Message-ID: <2c3c21060805060811y11874e76u40fde61f1d927e3a@mail.gmail.com>

2008/5/6, Ben Finney <bignose+hates-spam at benfinney.id.au>:
>  > >  So why not put symlink to Python over there on all machines, if
>  > >  we can put one (or env itself) there ?
> > To avoid linking all the rest of interpreters like perl, ruby, lua
>  > and dozens of others.
> The argument was being made from "thousands of scripts". Isn't "dozens
>  of symlinks" better?

I think that depending on /usr/bin/env is more farsighted and saves some future
headaches. Creating links in /usr/bin/ means, that you have to change them
whenever you update your software (e.g. any of your many interpreters ;-)).
Changing the "#!/usr/bin/python" into "#!/usr/bin/env python" means that you do
your job once, and you can sleep well. It also is more portable.

How was it in perl?
perl -p -i -e 's/#\!\/usr\/bin\/python/#\!\/usr\/bin\/env python/' *.py

Funny thing, I have just ls'ed /usr/bin/python on my system:
$ ls -l /usr/bin/python
lrwxrwxrwx 1 root root 24 2007-11-16 14:02 /usr/bin/python ->
/usr/local/bin/python2.5

:-)

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From alan.wright at volubill.com  Wed May 21 12:34:44 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 17:34:44 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net><mailman.1364.1211234091.12834.python-list@python.org><D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
	<mailman.1367.1211240706.12834.python-list@python.org>
	<iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
Message-ID: <0pidnUQqfP260qnVnZ2dnUVZ8t_inZ2d@pipex.net>

You must have something in your IPtables

I needed to put a rule in to drop these unwanted RST from getting back out.

All fixed now

Thanks for the advice

Alan

"Alan Wright" <alan.wright at volubill.com> wrote in message 
news:iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net...
> Same on FC8, sends RST after it sees SYN/ACK
>
> "Ghirai" <ghirai at ghirai.com> wrote in message 
> news:mailman.1367.1211240706.12834.python-list at python.org...
>> On Mon, 19 May 2008 23:50:50 +0100
>> "Alan Wright" <alan.wright at volubill.com> wrote:
>>
>>> Ghirai,
>>> Scapy does the same, only it sends RST and not FIN, so still no help
>>>
>>>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
>>>
>>> Only have windows at the moment sadly.
>>>
>>> Alan
>>>
>>
>> Are you sure there's no firewall or something else between you and the
>> remote host?
>>
>> Because i just tried that command with scapy and it didn't send any other 
>> packets
>> except what it was told (1 packet with SYN flag set).
>>
>> I haven't tried on windows though.
>>
>> -- 
>> Regards,
>> Ghirai.
>
> 




From software at ginstrom.com  Sat May 10 21:34:44 2008
From: software at ginstrom.com (Ryan Ginstrom)
Date: Sun, 11 May 2008 10:34:44 +0900
Subject: firefox add-on to grab python code handily?
In-Reply-To: <_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
	<_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>
Message-ID: <060201c8b307$31193e20$0203a8c0@MOUSE>

> On Behalf Of Larry Bates
> Since most of us keep Idle or some other Python IDE open 
> nearly 100% of the time we just copy from webpage, paste into 
> new Python document, and run in the IDE. 
> While you could clearly write a plug-in for FF to achieve 
> this, IMHO I doubt many people would actually use it.

Not that I'm going to implement it, but it would be really neat to tie
something together with codepad[1]

[1] http://codepad.org/
(With the site owner's permission, of course!)

Regards,
Ryan Ginstrom



From larry.bates at websafe.com`  Thu May 15 15:00:49 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 15 May 2008 14:00:49 -0500
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>

Johny wrote:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

Just create a ODBC DataSource (Control Panel/Administrative Tools/
DataSources) and use ODBC to read/write.

-Larry


From saptarshi.guha at gmail.com  Mon May 19 01:11:33 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Sun, 18 May 2008 22:11:33 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
Message-ID: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>

Hello,
I am using HadoopStreaming using a BinaryInputStream. What this
basically does is send a stream of bytes (  the java type is : private
byte[] bytes) to my python program.

I have done a test like this,
while 1:
	x=sys.stdin.read(100)
	if x:
		print x
	else:
		break

Now, the incoming data is binary(though mine is actually merely ascii
text) but the output is not what is expected. I expect for e.g

all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
118.010.241.12 60370 128.210.5.176

However i get a 1 before all and a 4 just after \n and before the 6.

My question is : how do i read binary data(Java's byte stream) from
stdin?
Or is this actually what i'm getting?

Thanks
Sapsi


From vlastimil.brom at gmail.com  Tue May  6 18:07:14 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 00:07:14 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
Message-ID: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>

Hi David,
thanks for your comments and hints, the proposed approach
with a list of dicts lookup dict is indeed much faster, than my previous
attempts with a database (even without psyco). I used a slightly different
structure with sets of indices, since they should be unique anyway and the
values are later used for the intersection.

This way the lookups (for indices given the tag values) seems to be about 20
times faster than the sqlite query (at least for my limited test case -
there might be some peculiarities with the real data);
however, the (visible) code is quite a bit more complex (for my taste);
(while looking back at
the following line in the inner loop of the lookup function:

tags_lookups[tag][item_dict[tag]] = tags_lookups[tag].get(item_dict[tag],
set()) | set([idx])

I thought, whether I am not overestimating myself with respect to the future
maintaining of the code ... :-)
I assume, that it most likely can
be written in a better way, but I tend to like the simplicity of the
sql version, as its speed is
fully acceptable too.

I will have to recheck these approaches, as soon as I have a more complete
real data available.

Thanks for reminding me about
the mxTextTools; I looked at this package very quickly several months
ago and it seemed quite
complex and heavy-weight, but maybe I will reconsider this after some
investigation ...

The
suggested XML structure is actually almost the one, I use to prepare
and control the input data
before converting it to the one presented in the previous mail :-). The main
problem is, that I can't seem to
make it fully valid XML without deforming the structure of the text
itself - it can't be easily decided,
what CUSTOM_TAG should be in some places - due to the overlapping etc.
Furthermore, the redundancy is actually greater, than it might seem from the
sample given here - there are sometimes more tags - some of them having the
same values for several dozens, sometimes hundreds, subsequent lines.
I also sometimes need to
access portions of texts spanning over multiple "tags", not just
single elements.


Thanks for your time and effort, I'll have the check the alternatives now
and test them a bit further,
  regards,
    Vlasta
-------------- next part --------------
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From spam at altium.nl  Thu May 15 06:26:09 2008
From: spam at altium.nl (Kees Bakker)
Date: Thu, 15 May 2008 12:26:09 +0200
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
Message-ID: <3c0c.482c0fc1.3224e@altium.nl>

Gabriel Genellina wrote:

> En Fri, 09 May 2008 10:37:30 -0300, v4vijayakumar <vijayakumar.subburaj at gmail.com> escribi?:
> 
>> On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
>> 42.desthuilli... at websiteburo.invalid> wrote:
>>> v4vijayakumar a ?crit :
>>>
>>> > When I started coding in python, these two things surprised me.
>>>
>>> > 1. my code is inconsistently indented with the combination of tabs and
>>> > spaces. Even lines looked intended, but it is not.
>>>
>>> Then you have a problem with your code editor - not with Python.
>>>
>>
>> Editors can not be wrong. :)
>>
>> I think there should be some way to say python compiler, to consider
>> tab and two blank spaces equal, when tab space = 2.
> 
> It already considers tab = 8 spaces, and when invoked with -tt it rejects mixed tabs+spaces. (I would like Python rejected *any* tab used for indenting...)
> There is a tool 'reindent.py' -somewhere on your Python install-, and an indentation checker 'tabnanny.py' (this one in the standard library).
> 

That's one of the reasons why I like Python :-)

Still too many people don't know that you must set a TAB to 8 in
your editor. Anything other than 8 for a TAB will, at some point,
confuse somebody.

Don't confuse indentation with TAB setting.

Many editors are not helpfull either. Pydev, for example, has a setting
for TAB, but it is used for indentation. It is just luck (I think) that
pydev has an option to say that you only want spaces. (Take a look at
the main preferences of Pydev.)

So far, I have seen only one editor that understands the difference between
TABs and indentation, and that is Emacs.
-- 
Kees



From nagle at animats.com  Thu May 15 01:33:14 2008
From: nagle at animats.com (John Nagle)
Date: Wed, 14 May 2008 22:33:14 -0700
Subject: Another BeautifulSoup crash on bad HTML
Message-ID: <482bc7f2$0$34555$742ec2ed@news.sonic.net>

    Can't really blame BeautifulSoup for this, but our crawler hit a page
("http://clagnut.com/privacy/") with an out of range character escape:

	&#82167;

in this text:

  If you provide a name, email address and/or website and choose &#8216;Remember 
  me&#82167;, these details will be stored as a cookie on your computer.

The author clearly meant "&#8217;", which is a single close quote.

The traceback as BeautifulSoup aborts:

SGMLParser.feed(self, markup or "")
File "/usr/local/lib/python2.5/sgmllib.py", line 99, in feed
self.goahead(0)
File "/usr/local/lib/python2.5/sgmllib.py", line 181, in goahead
self.handle_charref(name)
File "/var/www/vhosts/sitetruth.com/cgi-bin/sitetruth/BeautifulSoup.py", line 
1250, in handle_charref
data = unichr(int(ref))
ValueError: unichr() arg not in range(0x10000) (narrow Python build)

    Another item in our ongoing saga of "What happens when you parse real-world
HTML".

    A try-block in handle_charref would be appropriate.

				John Nagle
				SiteTruth


From efurman at admailinc.com  Fri May 23 19:08:54 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Fri, 23 May 2008 15:08:54 -0800
Subject: csv iterator question
In-Reply-To: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <48374E86.9040901@admailinc.com>

davidj411 wrote:

>When you save an open file to a variable, you can re-use that variable
>for membership checking.
>it does not seem to be that way with the csv.reader function, even
>when set to a variable name.
>
>what is the best way to store the open CSV file in memory or do i need
>to open the file each time?
>
>example of open method on file object:
>fhandle=open(filename).readelines()
>  
>
 >>> fhandle = open('c:/temp/08-02024.csv').readlines()
 >>> type(fhandle)
<type 'list'>
 >>> len(fhandle)
381

fhandle is a list containing the contents of the file, not a file handle 
-- that's why you can easily re-use it.

>example of csv.reader method:
>reader = csv.reader(open(csvfilename))
>  
>
Try this instead:
 >>>reader  = csv.reader(open('c:/temp/08-02024.csv'))
 >>> contents = [line for line in reader]
 >>> type(contents)
<type 'list'>
 >>> len(contents)
381

You still get a list that you can easily use, that has gone through the 
csv routines.

Hope this helps.
--
Ethan



From meesters at uni-mainz.de  Fri May 30 04:17:33 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Fri, 30 May 2008 10:17:33 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
	<mailman.1737.1212071482.12834.python-list@python.org>
Message-ID: <g1od6t$n38$1@news1.zdv.uni-mainz.de>


> Check if either x or y are NULL.
They aren't. Just did an explicit check.


From wizzardx at gmail.com  Sat May 10 06:02:25 2008
From: wizzardx at gmail.com (David)
Date: Sat, 10 May 2008 12:02:25 +0200
Subject: Pythonicity of some algorithms
Message-ID: <18c1e6480805100302n532b10c9j13dcd03b2d33e49f@mail.gmail.com>

Hi list.

I have 2 questions about the Pythonicity of some algorithms. One
question is about generator usage, the other is about producer and
consumer threads

GENERATOR QUESTION

Usually for generators, the usage is like this:

for var in generator():
    do_something(var)

I sometimes have cases where I want to use a generator, but I don't
want to stall the main program if the generator function doesn't have
any new data for me (maybe it's retrieving data from a device, but I
want to do other things with the same device if there isn't any data
yet).

So currently, some of my code looks something like this:

def get_serial_data():
    while True:
        block = request_a_packet_from_serial_device() # Get some raw data
        parsed_list = parse_block(block) # Extract a list of records
from the packet
        if parsed_list:
            # The record contains 1 or more records
            for record in parse_list:
                yield record
        else:
            # Sometimes there aren't any records in the packet
            yield None

def thread_function_for_handling_serial_device():
    record_iter = iter(get_serial_data())
    while True:
        record = record_iter.next()
        if record:
            handle_record() # eg: add to a queue for the main thread to process
        other_serial_logic1()
        other_serial_logic2()
        other_serial_logic3()

This works for me. But I'd like to know if this is considered
Pythonic, and if there are other, better ways of doing the above in
Python.

PRODUCER AND CONSUMER THREAD QUESTION

In some of my Python apps I use the producer/consumer model, where the
producer and consumer threads communicate through Queues.

Usually code (in the consumer thread function) looks something like this:

def consumer_thread():
    while True:
        record = some_queue.get()
        process_record(record)

In some cases I'd like to do something unusual to threads consuming a
queue - interrupt them, make them terminate, etc. The problem is that
a lot of the time it's locking, waiting for a record from
some_queue.get()

A few things I've considered:

1) Add a timeout to some_queue.get(), so the loop has a chance to do
other things while waiting for new records. This is problematic
because most of the time there isn't other things for the thread to
do. Also, it won't be able to respond immediately to those events.

2) Add special values to the queue, the purpose of which is to notify
the consumers. This is problematic when you have multiple consumers.
You have to add the exact correct number of 'interrupt' objects to the
queue.

3) Make a custom thread-safe queue class, with an 'interrupt_get'
method. When your app calls queue.interrupt_get(), all threads
currently locking on a queue.get() will continue, but with a
GetInterrupted exception thrown.

Perhaps there is some other Python threading idiom I should be using
in this case. Any suggestions?

David.


From Scott.Daniels at Acm.Org  Thu May  8 08:54:19 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 08 May 2008 05:54:19 -0700
Subject: POP connection timeout.
In-Reply-To: <mailman.753.1210249733.12834.python-list@python.org>
References: <mailman.753.1210249733.12834.python-list@python.org>
Message-ID: <BdydnUiwsriZa7_VnZ2dnUVZ_uOdnZ2d@pdx.net>

Aspersieman wrote:
> I have written an application that queries a POP mailbox and ...
 > I want to have it time out....
> I know that in python 2.5 I could pass an additional timeout parameter 
> to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
> TIMEOUTINSECONDS), but I am using python 2.4.
> 
> Can anyone help me implement this timeout functionality.

Obviously, get a copy of 2.5 and back-port the poplib code as
poplib25 or some such.  If you want more help than that, hire
someone to do it.

--Scott David Daniels



From tjreedy at udel.edu  Mon May 12 19:35:53 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 19:35:53 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
Message-ID: <g0ak8n$qc3$1@ger.gmane.org>


"Ohad Frand" <ohad.frand at percello.com> wrote in message 
news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
| I am looking for a way to programmically get a list of all python
| existing statements that I cannot access by __builtins__ or locals()
| (like ["assert","break","class",...])

You appear to want the keywords that begin statements.  Look at the keyword 
list in the language reference and pick those you want.  Then build that 
list into your program.





From dwblas at gmail.com  Thu May 29 16:25:54 2008
From: dwblas at gmail.com (dwblas at gmail.com)
Date: Thu, 29 May 2008 13:25:54 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <86eaad1f-ee49-4659-b151-3c052f109da4@a9g2000prl.googlegroups.com>

On May 29, 1:36?am, loial <jldunn2... at googlemail.com> wrote:
> only those lines that appear in the 2nd file but not in the 1st file.

set(file_2_recs).difference(set(file_1_recs)) will give the recs in
file_2 that are not in file_1 if you can store both files in memory.
Sets are indexed and so are faster than lists.


From fuzzyman at gmail.com  Mon May 19 08:40:31 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Mon, 19 May 2008 05:40:31 -0700 (PDT)
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <0ccf8394-7f3e-4fd8-990c-2250045acac3@m3g2000hsc.googlegroups.com>

On May 19, 1:34 am, cmoller <cmol... at dpbioventures.com> wrote:
> Hi,
>
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
>
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical. I am not in a hurry and would approach the problem as a way
> to learn.
>


You could also use Resolver One, a spreadsheet program that lets you
put Python code inside your spreadsheets (effectively providing a
'spreadsheet-like' front end to the code you write).

http://www.resolversystems.com/
http://www.resolverhacks.net/


All the best,

Michael Foord
http://www.ironpythoninaction.com/


> The data I am processing is readily seen via telnet so I know it's
> there.
>
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?
>
> Thanks,
>
> Chris



From sarenius at sun3.oulu.fi  Sun May 25 15:30:58 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:30:58 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
Message-ID: <slrng3jfji.hio.sarenius@sun3.oulu.fi>

In article <slrng3jf96.hio.sarenius at sun3.oulu.fi>, Vesa-Matti Sarenius wrote:
>In article <mailman.1575.1211740436.12834.python-list at python.org>, Tim Golden wrote:
>>so it's just possible that one of your filenames has
>>a non-ascii char in it without your noticing? (Altho'
>>I'd find that an odd character to include in a filename).
>
>There is somewhere since printing worked when I changed the filename
>completely.

I found the problem place, it is:

cmd = '''"C:\\Program Files\\Ghostgum\\gsview\\gsprint.exe" -color ''' + 
full_filename

and with that the full_filename has something utf. I tried repr or .encode
("utf8") there but got "file not found" althougt the script itself worked.

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *





From castironpi at gmail.com  Sat May 17 06:19:59 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 03:19:59 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<95854850-a48a-4ce9-a55e-5820d0651925@b64g2000hsa.googlegroups.com>
Message-ID: <6f5f1e80-d91b-4eda-a2c2-a278a31fe5ca@m36g2000hse.googlegroups.com>

On May 17, 1:09 am, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 16, 4:46 am, "??" <littlesweetme... at gmail.com> wrote:
>
> > Howdy,
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> > To make it correct, we have to create a new class:
> > class MyClass(object): pass
> > a = MyClass()
> > a.b = 1       # OK
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> I suspect it's possible to come up with a property that causes LSP to
> be violated for any two given distinct classes.
>
> For example, if the property you're considering is "Raises an
> exception when you try to access an attribute", then yes, the subtype
> cannot be substituted for the base type and would violate LSP.
> However, that's not really such a useful property in most cases.
>
> The reason instances of object don't have dynamic attributes is
> because dyanmic attributes are internally represented by a dict
> object.  To keep memory footprint low, instances of many built-in
> types don't have an associated dict and so can't bind attributes
> dynamically.  Instances of object can't have an associated dict
> because, if they did, it would mean all objects would have to have an
> associated dict, because all types are subclasses of object.
>
> Because of this, direct instances of object really don't have much use
> in Python.  It's one main use case is as a sentinel or marker of some
> sort.  It's only useful property is that it is itself, and nothing
> else.  But, that property is true of all instances in Python;
> therefore any instance may be substituted for an object instances,
> therefore it satisfies LSP.
>
> (Phew: what a tangle of nomenclature that was.)
>
> Carl Banks

Python is the same language on sufficiently many distinct machines
that all the people can use it if they want.  That means identical
outputs.  Do their 100%-ers go with the times?


From jorge.vargas at gmail.com  Tue May  6 02:36:07 2008
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Tue, 6 May 2008 02:36:07 -0400
Subject: config files in python
In-Reply-To: <e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
	<ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>
	<e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>
Message-ID: <32822fe60805052336ued36682ne1023d50a92ad3c8@mail.gmail.com>

On Tue, May 6, 2008 at 2:00 AM, sandipm <sandip.more at gmail.com> wrote:

>
>  here I would like to have python file which read conf from text file
>  and load those params in current process space.
>  so only importing that python file should read up the conf file and
>  load the current process with configurable parameters.
>  I thought this would be good way to do it, rather than getting
>  involved in slightly complicted reload mechanisms of python modules?
>
I think you should work your way into a proper configuration system.

for ones you can use the buildin module
http://docs.python.org/lib/module-ConfigParser.html

or migrate to the more powerful configObj
http://www.voidspace.org.uk/python/configobj.html
>

with configobj, you will have an instance in memory that you can
modify on runtime with a gui or something and when you hit save it
will rewrite the new config file.
>
>  Regards,
>  Sandip
>
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From sharma.mohit80 at gmail.com  Wed May 21 02:13:38 2008
From: sharma.mohit80 at gmail.com (rema.khan)
Date: Tue, 20 May 2008 23:13:38 -0700 (PDT)
Subject: online computer shops
Message-ID: <eb4f9b60-a5d0-4ac0-9661-01eb0f6fda48@g16g2000pri.googlegroups.com>

    * Drives & Writers,
    * Hard Drives & Storage,
    * Headphones & Mics,
    * Internet / Internet Telephony,
    * Keyboards & Mouse,
    * Memory / RAM,
    * Memory Card & Readers,
    * Modems,
    * TV Tuner Cards,
    * UPS,
    * USB Devices,
    * WebCams,
    * Wireless Accessories........ a big computer peripherals shop
from online please visit -
http://www.homeshop18.com/shop/u/y/c-Computers-Q-and-Q-Peripherals/Home_Online-clI_2-cI_909-


From daveparker at flamingthunder.com  Mon May 12 20:07:30 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:07:30 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <a6681465-a1fa-4b0d-b712-a7a8ef0fe8e2@w8g2000prd.googlegroups.com>

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.

I agree; it's a common flaw with lots of languages, not just Python.

I'd be inclined to use something like:

FOR 8 TIMES DO <statement>.

or:

REPEAT <statement> FOR 8 TIMES.

as a compromise between readability and machine-parsability.

If anyone has other suggestions, please post them here and I'll
implement one of them next weekend in Flaming Thunder.


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:12:17 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:12:17 -0300
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <op.uavfernfx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 22:57:03 -0300,  
<andrej.panjkov at climatechange.qld.gov.au> escribi?:

> On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>> No, no, no, no, no!
> Geez.  Go easy.
>> You have got it entirely wrong here. Your XOR function simply
[...]
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.

Don't take it so seriously. I would have written a reply in the same tone.  
Weeds must be uprooted early :)

> Both the responses offer lambda free alternatives.  That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree.  So what applications are lambdas suited to?  I
> think the parameterised function model is one.
> What else?

It should be clear now that lambda is just a shortcut for defining a  
normal function using "def", except it has no name, and it can handle  
expressions only (no statements).
So you never *need* a lambda. But in a few cases they're useful:

- Most GUIs are event-driven, and let you bind a function (or any other  
callable object) to be executed when certain event happens (by example,  
when certain button is pressed, or a menu item is selected). Usually an  
instance method is used: Button("Total", onclick=self.calculate_total).  
Suppose you're developing a calculator; the ten buttons labeled '0' to '9'  
should inserte the corresponding digit. To do that, you should write ten  
functions insert_digit_0 to insert_digit_9 (and they would be  
one-line-functions: insert_digit('0') ... insert_digit('9')). Too boring :(
The usual idiom is something like this:
     Button("0", onclick=lambda: self.insert_digit('0'))
     Button("5", onclick=lambda: self.insert_digit('5'))

- To write an expression that is to be evaluated lazily (perhaps only if  
certain other conditions are met). Older Python versions didn't have a  
conditional expression like C's :? ternary operator, and one possible way  
to emulate it is this:

def iif(cond, if_true, if_false):
     if cond:
         return if_true()
     else:
         return if_false()

iff(x!=2, lambda: 1/(x-2), lambda: 100)

You can't write iff(x!=2, 1/(x-2), 100) because arguments are evaluated  
before the function is called, and with x=2 you get an error.

-- 
Gabriel Genellina



From spam-trap at telus.net  Thu May  1 01:05:12 2008
From: spam-trap at telus.net (L. Lindstrom)
Date: Thu, 01 May 2008 05:05:12 GMT
Subject: Python 2.6 and wrapping C libraries on Windows
In-Reply-To: <_X8Sj.3499$XI1.3261@edtnps91>
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91>
Message-ID: <cccSj.3526$XI1.939@edtnps91>

L. Lindstrom wrote:
> Christian Heimes wrote:
>> L. Lindstrom schrieb:
[snip]
>>> [B]esides heap management and FILE pointers, is there any reason SDL, or
>>> any C dependency, needs to link to the same C run-time as Python? If I
>>> ensure SDL frees memory it allocates and does not directly access a file
>>> opened by Python can I just use another C run-time such as msvcrt?
>>>
>>
>> Your analysis of the problem and the implication of mixing CRTs is
>> correct. However ...
>>
>> It should be trivial to modify the build systemof SDL so that the
>> manifest is integrated into the DLLs. Everything else is a hack. It
>> *should* work and in reality it *does* work for most cases. But someday
>> you'll hit a solid wall and get strange and hard to debug segfaults.
>>
[snip]
> Linking to msvcr90.dll is possible with MinGW. The problem is with the 
> configure scripts. So I can run configure against msvcrt.dll, then 
> switch to mscvr90.dll for make. If this works I will make SDL and a test 
> program available on-line so someone can find the appropriate manifests.
> 
> 
Here is my attempt to link SDL and a test program with msvcr90.dll. It 
can be found at http://www3.telus.net/len_l/pygame . The md5sum is:

f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip

Both lack a manifest. The test program and SDL work when a surrogate 
run-time is provided, a renamed msvcr71.dll . So if someone can show me 
the necessary manifest to make SDL use the C run-time installed by the 
Python 2.6 installer I would appreciate it. SDL is built with MinGW so I 
doubt I can distribute the run-time with it.

-- 
Lenard Lindstrom
"%s@%s.%s" % ('len-l', 'telus', 'net')


From ravinderthakur at gmail.com  Wed May 21 13:28:25 2008
From: ravinderthakur at gmail.com (=?UTF-8?B?4KSw4KS14KWA4KSC4KSm4KSwIOCkoOCkvuCkleClgeCksCAocmF2aW5kZXIgdGhha3VyKQ==?=)
Date: Wed, 21 May 2008 10:28:25 -0700 (PDT)
Subject: extracting title and/or summary of a website
Message-ID: <538c89e3-606e-46cb-9f14-671b257e037f@z72g2000hsb.googlegroups.com>

hello friends,


is there any lib in python that provides a mechanism to get the title
of a web page ? also is there anything available to get a nice summary
like the way google shows below every link ?


thanks
ravinder thakur


From castironpi at gmail.com  Thu May  8 19:54:22 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:54:22 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
Message-ID: <bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>

On May 8, 5:45?pm, skunkwerk <skunkw... at gmail.com> wrote:
> i'm getting the wrong output for the 'title' attributes for this
> data. ?the queue holds a data structure (item name, position, and list
> to store results in). ?each thread takes in an item name and queries a
> database for various attributes. ?from the debug statements the item
> names are being retrieved correctly, but the attributes returned are
> those of other items in the queue - not its own item. ?however, the
> model variable is not a global variable... so i'm not sure what's
> wrong.
>
> i've declared a bunch of worker threads (100) and a queue into which
> new requests are inserted, like so:
>
> queue = Queue.Queue(0)
> ?WORKERS=100
> for i in range(WORKERS):
> ? ? ? ? thread = SDBThread(queue)
> ? ? ? ? thread.setDaemon(True)
> ? ? ? ? thread.start()
>
> the thread:
>
> class SimpleDBThread ( threading.Thread ):
> ? ?def __init__ ( self, queue ):
> ? ? ? ? ? ? ? ? self.__queue = queue
> ? ? ? ? ? ? ? ? threading.Thread.__init__ ( self )
> ? ?def run ( self ):
> ? ? ? ? ? ? ? ? while 1:
> ? ? ? ? ? ? ? ? ? ? ? ? item = self.__queue.get()
> ? ? ? ? ? ? ? ? ? ? ? ? if item!=None:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? model = domain.get_item(item[0])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? logger.debug('sdbthread item:'+item[0])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? title = model['title']
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? scraped = model['scraped']
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? logger.debug("sdbthread title:"+title)
>
> any suggestions?
> thanks

I'll base this on terminology: if a model is in a brain (throughout
the known universe), and a dollar's a dollar, it may not pay to build
a computer out of brains.

If man arises as a tool-carrier, we will carry tools, not people.
Don't use Python to make people; make money, and not too much.  Pick a
wage and you might get somewhere.


From s0suk3 at gmail.com  Thu May 22 09:08:31 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 06:08:31 -0700 (PDT)
Subject: Loading contents behind the scenes
Message-ID: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>

Hi, I wanted to know how cautious it is to do something like:

f = file("filename", "rb")
f.read()

for a possibly huge file. When calling f.read(), and not doing
anything with the return value, what is Python doing internally? Is it
loading the content of the file into memory (regardless of whether it
is discarding it immediately)?

In my case, what I'm doing is sending the return value through a
socket:

sock.send(f.read())

Is that gonna make a difference (memory-wise)? I guess I'm just
concerned with whether I can do a file.read() for any file in the
system in an efficient and memory-kind way, and with low overhead in
general. (For one thing, I'm not loading the contents into a
variable.)

Not that I'm saying that loading a huge file into memory will horribly
crash the system, but it's good to try to program in the safest way
possibly. For example, if you try something like this in the
interpreter on a Windows machine, everything will start working
slowly, and you'll likely have to reboot the OS:

s = ((("abc" * 999999) * 999999) * 99999) * 999999


From malaclypse2 at gmail.com  Wed May  7 21:14:52 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 7 May 2008 21:14:52 -0400
Subject: web client in Python Q
In-Reply-To: <VIrUj.662659$us.202429@fe04.news.easynews.com>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
Message-ID: <16651e80805071814had02dc2q5c334f20e55561d1@mail.gmail.com>

On Wed, May 7, 2008 at 8:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
> Hey folks.  I know approximately zero about web clients.  There's a simple
> task I want to do. (I think it's probably simple.) And I figure a Python
> script ought to be just the ticket.
>
>  Various web services for daily stock ticker info.  For example,
>
>  http://finance.google.com/finance/historical?q=NYSE:APC&output=csv
>
>  and
>
> http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv

That should be a pretty straightforward script.  Take a look at this,
and see if it helps:

>>> import urllib
>>> page = urllib.urlopen('http://finance.google.com/finance/historical?q=NYSE:APC&output=csv')
>>> data = page.readlines()
>>> data[0]
'Date,Open,High,Low,Close,Volume\n'
>>> data[1]
'7-May-08,76.13,77.94,75.60,76.68,9501300\n'
>>> data[1].strip().split(',')
['7-May-08', '76.13', '77.94', '75.60', '76.68', '9501300']

>>> page = urllib.urlopen('http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv')
>>> data = page.readlines()
>>> data[0]
'"APC",76.68,"5/7/2008","4:01pm",+2.15,76.14,77.94,75.60,9501342\n'
>>> data[1]

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in <module>
    data[1]
IndexError: list index out of range
>>>

The urllib documentation is here: http://docs.python.org/lib/module-urllib.html
Both of those formats look pretty straightforward to parse, but if
you're dealing with more complicated CSV files, take a look at the csv
module.

-- 
Jerry


From google at mrabarnett.plus.com  Sat May 24 12:50:40 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Sat, 24 May 2008 09:50:40 -0700 (PDT)
Subject: Partial download with ftplib and retrbinary
References: <9dd32f80-ce21-4c2c-8eba-1afd3b80379f@x41g2000hsb.googlegroups.com>
Message-ID: <1c7b8253-92c5-4753-aa13-83df838bf2a9@d45g2000hsc.googlegroups.com>

On May 24, 11:53 am, fepeac... at googlemail.com wrote:
> I am breaking/interrupting my connection with the ftp server at
> present when doing a partial download of a file. I have a callback
> with retrbinary that raises an exception and ends the download. The
> problem is that the server is not notified and hangs. I cannot send
> any further commands and need to relogin to download further. Is there
> a way to still continue downloading without having to login again.
>
> My retrbinary function is:
>
> ftp.retrbinary('RETR '+file, handleDownload,1,bound[0])
>
> where bound[0] is an integer specifying the start byte of the
> download.
>
> My callback is:
>
> def handleDownload(block):
>     global count,localfile,number
>     localfile.write(block)
>     if count==number:
>             raise(Exception)
>     count=count+1
>
> where number specifies the number of bytes to download.
>
> Help would be gratefully received.

Have you tried ftp.abort()? The docs say "Abort a file transfer that
is in progress. Using this does not always work, but it's worth a
try.".

I'd also suggest that you download more than 1 byte at a time, perhaps
1024 (fewer if you're on dial-up).


From kamhung.soh at gmail.com  Sat May 17 21:08:42 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 18 May 2008 11:08:42 +1000
Subject: comparison of files using set function
References: <aa405c1f0805170747y7fd128dwbdf9dd91404c58e4@mail.gmail.com>
Message-ID: <op.ubbr4sftev04yd@hungvista>

On Sun, 18 May 2008 00:47:55 +1000, Beema shafreen  
<beema.shafreen at gmail.com> wrote:

> I have files with two column, column 1 is with id and column 2 is with
> data(sequence)
> My goal is to create a table in such a way, the column one of the table
> should have all the id from the files and next column will be have the
> respective seq of the file1 with correlation to the id and the third  
> column
> will be sequence information of the next file with respective to the id
> original files look like this
>
> 45    ytut
> 46    erete
> 37   dfasf
> 45  dassdsd
>
>
> and so on  for all the 10 files that is it has two column as mentioned
> above.
>
> The output should look like this:
>
> Id    file1      file2     file3     file4   file5
> 43    ytuh    ytuh     ytuh    ytuh    ytuh
> 46   erteee   rty       ryyy              ertyu
> 47   yutio    rrr                    eeerr
>
>
>
> The goal is if the pick all the common id in the files and with their
> respective information in the adjacent rows.
> the various conditons ca also prevails
> 1) common id present in all the files, which have same information
> 2)common id present in all the files, which donot have same information
> 3) common id may not be present in all the files
>
> But the goal is exactly find the common id in all the files and add their
> corresponding information in the file to the table as per the view
>  my script :
> def file1_search(*files1):
>     for file1 in files1:
>         gi1_lis = []
>         fh = open(file1,'r')
>         for line in fh.readlines():
>             data1 = line.strip().split('\t')
>             gi1 = data1[0].strip()
>             seq1 = data1[1].strip()
>             gi1_lis.append(gi1)
>         return gi1_lis
> def file2_search(**files2):
>     for file2 in files2:
>         for file in files2[file2]:
>             gi2_lis = []
>             fh1 = open(file,'r')
>             for line1 in fh1.readlines():
>                 data2 = line1.strip().split('\t')
>                 gi2 = data2[0].strip()
>                 seq2 = data2[1].strip()
>                 gi2_lis.append(gi2)
>
>             return gi2_lis
> def set_compare(data1,data2,*files1,**files2):
>     A = set(data1)
>     B = set(data2)
>     I = A&B # common between thesetwo sets
>
>     D = A-B #57 is the len of D
>     C = B-A #176 is  the len of c
> #    print len(C)
>  #   print len(D)
>     for file1 in files1:
>         for gi in D:
>             fh = open(file1,'r')
>             for line in fh.readlines():
>                 data1 = line.strip().split('\t')
>                 gi1 = data1[0].strip()
>                 seq1 = data1[1].strip()
>             if gi == gi1:
> #                print line.strip()
>                     pass
>
>     for file2 in files2:
>         for file in files2[file2]:
>             for gi in C:
>                 fh1 = open(file,'r')
>                 for line1 in fh1.readlines():
>                     data2 = line1.strip().split('\t')
>                     gi2 = data2[0].strip()
>                     seq2 = data2[1].strip()
>                 if gi == gi2:
>                    # print line1.strip()
>                     pass
> if __name__ == "__main__":
>     files1 = ["Fr20.txt",\
>               "Fr22.txt",\
>               "Fr24.txt",\
>               "Fr60.txt",\
>               "Fr62.txt"]
>     files2 = {"data":["Fr64.txt",\
>               "Fr66.txt",\
>               "Fr68.txt",\
>               "Fr70.txt",\
>               "Fr72.txt"]}
>     data1 = file1_search(*files1)
>
>     """113 is the total number of gi"""
>     data2 = file2_search(**files2)
>     #for j in data2:
>      #   print j
>     """232 is the total number of gi found"""
>     result = set_compare(data1,data2,*files1,**files2)
>
>  It doesnot work fine... some body please suggest me the way i can  
> proceed .
> Thanks a lot
>

1. Test with a small number of short files with a clear idea of the  
expected result.
2. Use better variable names.  Names such as file1_search, file2_search,  
gi, gi2, A, B, C and D make it nearly impossible to understand your code.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From nospam at here.com  Mon May 19 17:34:20 2008
From: nospam at here.com (Dennis)
Date: Mon, 19 May 2008 22:34:20 +0100
Subject: python confusion possibly related to pickle
In-Reply-To: <mailman.1322.1211139854.12834.python-list@python.org>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
	<mailman.1322.1211139854.12834.python-list@python.org>
Message-ID: <rtWdnfLHYfjAb6zVnZ2dneKdnZydnZ2d@posted.plusnet>

Derek Martin wrote:
> On Sun, May 18, 2008 at 08:28:34PM +0100, Dennis wrote:
>> The problem that's got me annoyed is that after getting said error I
>> close the shell window, open a new one, run the python interpreter
>> and type "import pickle" and get the error that the script I'd run
>> earlier caused. Why is this ?
> 
> Well, what's the error?  Sounds like your system could be b0rked (or
> at least your python installation)... but depending on the error,
> there could be other explanations.  
> 

Nah, just a case of being in a directory of my home directory that has a 
file called pickle.py in it. That file has a known error. I then ran 
python interactively and typed "import pickle". As a result I end up 
importing the file in my current directory instead of the python module 
I want to import.

I was just being daft :-D


From stefan_ml at behnel.de  Wed May 21 15:50:55 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 21 May 2008 21:50:55 +0200
Subject: xpath with big files
In-Reply-To: <mailman.1410.1211354074.12834.python-list@python.org>
References: <mailman.1410.1211354074.12834.python-list@python.org>
Message-ID: <48347d1f$0$6543$9b4e6d93@newsspool3.arcor-online.net>

Vladimir Kropylev wrote:
> I've encountered a problem when trying to use lxml.etree.xpath with
> big (63Mb) file. It returns empty list on any request.
> Is there any restriction on file size for lxml.etree.xpath?

No.


> This is what I do:
> 
> f=open(filename)
> tree = etree.parse(f)
> f.close()

Consider using

   tree = etree.parse(filename)


> r = tree.xpath('//image')
> print(r)
> 
> it prints:
> []
> 
> What is wrong here?

Does your document use namespaces? In that case, asking for an unnamespaced
"image" will not get you any result.

Stefan


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:18:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:18:59 -0300
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>
Message-ID: <op.ua3a1xzsx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:46:45 -0300, <dannywebster at googlemail.com> escribi?:
> On May 13, 11:28 am, dannywebs... at googlemail.com wrote:

>> Hi - I have a list returned from popen/readlines, and am wondering how
>> to go about iterating over each item which was returned (rather than
>> currently having the whole lot returned).
>>
>> >>> f=os.open("./get_hostnames").readlines
>
> I did indeed mean "os.popen", no "os.open"

Ouch, replace open with popen an my example is valid (but to get the  
meaning I intended to write, replace os.open with open...)

-- 
Gabriel Genellina



From mattheww at chiark.greenend.org.uk  Sun May 25 05:06:21 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 10:06:21 +0100 (BST)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
	<mailman.1555.1211681333.12834.python-list@python.org>
Message-ID: <5hv*dSKds@news.chiark.greenend.org.uk>

Michael L Torrie  <torriem at gmail.com> wrote:
> Watch your programmers then.  They do have to write and debug the
> code. And they will spend at least as much or more time debugging as
> writing the code.  It's a fact.  I have several programmers working
> for me on several projects.  What you have been told is fact.

This isn't the case for everyone. In my workplace the time we spend
debugging is small compared to the time writing the code in the first
place. I wonder what the difference is?

We do use unit-testing quite widely, but by no means everywhere. The
code which doesn't have unit tests doesn't tend to be any buggier than
the code which does. Where testsuites really help is when you have to
upgrade some library or service that your programs are depending on,
and you get to find out about subtle backwards-incompatibilities.

-M-


From jhenRemoveThis at talk21.com  Thu May 29 18:14:17 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Fri, 30 May 2008 08:14:17 +1000
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
Message-ID: <6a8o5pF34umpoU1@mid.individual.net>

Gandalf wrote:

> how do i write this code in order for python to understand it
> and print me the x variable
> 
> x=1
> def aaaa():
>     x++
>     if x > 1:
>         print "wrong"
>     else :
>         print x
> 
> aaaa()

Example:

x=1
def aaaa(x):
    x += 1
    if x > 1:
        return "wrong"
    else :
       return x

print aaaa(x)


John


From arnodel at googlemail.com  Sat May 17 03:20:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 17 May 2008 08:20:15 +0100
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>
	<7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com>
Message-ID: <m2zlqp75xs.fsf@googlemail.com>

dave.g1234 at gmail.com writes:

> On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>>
>> > Thanks for the responses.  I'm well aware that the function can be
>> > passed in the parameters, passing in the functino as an arg defeats
>> > the purpose of what I'm going after.
>>
>> Why so ?
>> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
>> > but a perfunctory glance looks like we're doing the close to the same
>> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
>> > can pass in other parameters to foo.
>>
>> I may be wrong (if so please pardon my lack of intelligence and/or
>> provide a couple use case), but it looks like you're trying to
>> reinvent partial application.
>>
>> from functools import partial
>> def foo(x, y):
>>   return x + y
>>
>> pfoo = partial(foo, 2)
>> print pfoo(42)
>>
>> Don't know if this helps...
>
> Ok, so that solves the issue of the aforementioned compose function.
> We could do compose( partialfoo,....) ) etc (although I might say I
> prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
> provide wrapper around an object that lets you call abritrary
> functions on that object with it as a parameter - i.e., as if it were
> a method in a class.  The partial function was only a component of the
> code I posted earlier. Or am I missing something you're saying?

Ok so you want to do

    wrap(x).foo(42).bar('spam')...

What is the advantage over

    foo(x, 42)
    bar(x, 'spam')
    ...

?

-- 
Arnaud


From bignose+hates-spam at benfinney.id.au  Thu May 29 17:57:40 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 30 May 2008 07:57:40 +1000
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <87y75srcx7.fsf@benfinney.id.au>

Nikhil <mnikhil at gmail.com> writes:

> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.

What problem are you trying to solve?

Are you aware that Python file objects are already iterable, yielding
one line of text per iteration?

    input_file = open("foo.txt")
    for line in input_file:
        do_stuff(line)

-- 
 \        "I'd take the awe of understanding over the awe of ignorance |
  `\                                       any day."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From python at bdurham.com  Wed May  7 17:29:12 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 17:29:12 -0400
Subject: Generate labels for a multi-level outline
In-Reply-To: <12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>
	<12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>
Message-ID: <1210195752.23534.1251967793@webmail.messagingengine.com>

Castironpi,

> Do you want send and throw in it too?

If its not too much trouble, I would love to see how you add these.

> formatter.NullFormatter.format_counter
> formatter.NullFormatter.format_letter
> formatter.NullFormatter.format_roman

I'm not sure what you mean by the above lines ... <googling> ... are you
referencing formatter.py?
http://www.koders.com/python/fid4B7C6E1C20384FC7521414F46DF9DAA33DF2CA11.aspx

Thanks for your help on this - I'm learning a lot! 

Malcolm

PS: "throw( up )" ... very funny! :)


From carsten.haese at gmail.com  Tue May  6 08:55:21 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Tue, 06 May 2008 08:55:21 -0400
Subject: Comparing strings - akin to Perl's "=~"
In-Reply-To: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <ZyYTj.13423$GE1.2802@nlpi061.nbdc.sbc.com>

krumblebunk at gmail.com wrote:
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result
>     f=dict(foo)
>     for k in f.iteritems()
>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.
>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.
> 
> This breaks spectacularly -

Several observations:

* "breaks spectacularly" is not a useful description of a failure. If 
you get an exception, show us the exception. If you get an unexpected 
result, show us the result and tell us how it differs from the result 
you expected.

* To check whether a string starts with a given string, use the 
startswith() method: if k.startswith("Hostname"): ...

* Why the "f=dict(foo)"? Isn't foo already a dictionary?

* Since f is a dictionary, presumably keyed on column names, f[3] is 
unlikely to work. You're going to have to use the name of the fourth 
column to pull out the value you're looking for.

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From f.pollastri at inrim.it  Thu May 22 08:50:04 2008
From: f.pollastri at inrim.it (Fabrizio Pollastri)
Date: Thu, 22 May 2008 14:50:04 +0200
Subject: merging the global namespaces of two modules
In-Reply-To: <cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
References: <mailman.1469.1211449697.12834.python-list@python.org>
	<cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
Message-ID: <48356BFC.7010700@inrim.it>

Jeff wrote:
> Can you be more specific?  modA and modB don't import from each other
> but both need to access objects in the global namespace of what
> module?  The controlling application?

> Or do you mean that, for
> example, modA needs to access some functions in modB, but does not
> have import statements to do so, and you want the controlling program
> to do the imports for it?

Exactly this.

> If that is the case, that is bad
> programming practice in Python.  Python is not C and you can't just
> share header files :)

Ok. I know that I want a python import to behave like a C include, it is so bad?

The motivation arise from a family of applications that import, among others, 
two modules: a basic one and a specific one. The specific one is chosen from a 
set of modules at import time depending on other imported modules, so the basic 
module can known its external references against the specific module only at run 
time.

One solution can be:
-the application imports the basic module,
-the basic module selects the proper specific module among the allowable 
specific modules,
-the basic module imports the selected module with an __import__ call equivalent 
to "import selected_module_X as select_module",
-Any reference to the specific module in the basic module is written in the form 
"selected_module.object_name".

Any better solution?


Fabrizio.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 10:44:25 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 16:44:25 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <g11bft$7b4$3@registered.motzarella.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>	<483406a0$0$10773$426a74cc@news.free.fr>	<g11128$n1n$2@registered.motzarella.org>	<48342ff3$0$20826$426a34cc@news.free.fr>
	<g11bft$7b4$3@registered.motzarella.org>
Message-ID: <4834353c$0$15524$426a74cc@news.free.fr>

Richard G Riley a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
> 
>> Richard G Riley a ?crit :
>>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
>> (snip)
>>
>>>> And not that useful - why would one care about the function being
>>>> defined in class X or Y when one have the exact file and line ?
>>> Very obvious I would think. One can develop ones own interactive class
>>> browser and code navigator.
>> From the traceback ?
>>
>>>  One can not bring up class help from "line 3
>>> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
>>> the class name I can navigate directly to all sorts of class related
>>> information without the need to delve into a physical usage of it e.g
>>> program.py at line 3.
>> Please bear with me, but I'm afraid I still don't get the point : I
>> don't need tracebacks to get to some object's info (help etc).
> 
> This is a view quite common to people when they are happy with what they
> have. Some like to improve what they have. It is immediately apparent to
> me why having a class name and method name in the traceback would be
> immediately useful.

Then please explain.

> Having written a few extensions to IDEs in the past
> I know it would help me,

To do what ?



From paulgeeleher at gmail.com  Thu May 29 09:20:14 2008
From: paulgeeleher at gmail.com (sophie_newbie)
Date: Thu, 29 May 2008 06:20:14 -0700 (PDT)
Subject: Reporting the line number of an exception
Message-ID: <229d7d86-c652-4282-aaa9-4274cd0d63fd@a1g2000hsb.googlegroups.com>

I'm sure this is exceedingly simple but I can't find it anywhere. When
I catch an exception I would like to report the line number of the
exception as well as the error info.

try:
    someError()
except Exception, e:
    "print_error_and_line_number"

How do I find the line number?

Thanks for any help!


From frank at niessink.com  Mon May 12 05:17:16 2008
From: frank at niessink.com (Frank Niessink)
Date: Mon, 12 May 2008 11:17:16 +0200
Subject: Problem with custom events in wxpython
In-Reply-To: <3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
	<mailman.941.1210519666.12834.python-list@python.org>
	<3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>
Message-ID: <67dd1f930805120217j2cdf503aj8bacdc5cd30ab451@mail.gmail.com>

Hi Jimmy,

2008/5/12 Jimmy <mcknight0219 at gmail.com>:
> On May 11, 11:27 pm, "Frank Niessink" <fr... at niessink.com> wrote:
>  > 2008/5/11 Jimmy <mcknight0... at gmail.com>:
>  > > I have a class A handling some data processing work and another class
>  > > B of GUI matter. I need GUI to display information when data in A is
>  > > updated.
>  > > I know cutom events in wxpython may work.
>  >
> > You may want to look at the pubsub module.
>
>  it works! however, it seems the message can not be exchanged between
>  processes :(
>  actually what I want to do is let a running process send data to GUI
>  process and display it

Well, that is some crucial information you didn't mention in your
original question... I guess for the communication between processes
you can use the regular python batteries available or something like
Pyro. In your GUI process you can use a thread to listen/wait for new
information to display and then send it to the main (GUI) thread. See
http://wiki.wxpython.org/LongRunningTasks

Cheers, Frank


From jcd at sdf.lonestar.org  Tue May 13 08:06:28 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 13 May 2008 08:06:28 -0400
Subject: Backslash frowned upon?
In-Reply-To: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <1210680388.6481.1.camel@jcd-desktop>

On Tue, 2008-05-13 at 03:25 -0700, wxPythoner at gmail.com wrote:
> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Many people think it looks ugly, but it still works, and there are times
when nothing else will do, so it should continue to work for the
foreseeable future.

Cheers,
Cliff



From bruno.desthuilliers at gmail.com  Fri May 16 17:29:33 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:29:33 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>

On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
> On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > i extract info from one file and put it into a dictionary.
> > > i want to save that dictionary for later use, how do i do that?
> > > might save a list of dictionaries or a list of classobjects too if
> > > there is any difference.
>
> > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > ...
> > Jay Graves
>
> pickle.dumps(mg)
> pickle.load(mg)
>
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

What about *READING THAT FUCKING MANUAL* ?

http://docs.python.org/lib/node316.html
"""
dump(obj, file[, protocol])
    Write a pickled representation of obj to the open file object
file. This is equivalent to Pickler(file, protocol).dump(obj).

    If the protocol parameter is omitted, protocol 0 is used. If
protocol is specified as a negative value or HIGHEST_PROTOCOL, the
highest protocol version will be used.

    Changed in version 2.3: Introduced the protocol parameter.

    file must have a write() method that accepts a single string
argument. It can thus be a file object opened for writing, a StringIO
object, or any other custom object that meets this interface.

load(file)
    Read a string from the open file object file and interpret it as a
pickle data stream, reconstructing and returning the original object
hierarchy. This is equivalent to Unpickler(file).load().

    file must have two methods, a read() method that takes an integer
argument, and a readline() method that requires no arguments. Both
methods should return a string. Thus file can be a file object opened
for reading, a StringIO object, or any other custom object that meets
this interface.

    This function automatically determines whether the data stream was
written in binary mode or not.
"""

Example use:

>>> d = dict(a=1, b=2)
>>> f = open("mydict.dat", "w")
>>> pickle.dump(d, f)
>>> f.close()
>>> f = open("mydict.dat")
>>> d2 = pickle.load(f)
>>> f.close()
>>> d2 == d
True
>>> d2
{'a': 1, 'b': 2}
>>>

Now : it's not the first time - in a couple days - that you ask a
question that you wouldn't have asked if you had taken a couple
minutes doing the tutorial and/or reading the doc. This newsgroup is
*very* tolerant (in most other places on usenet, you would have get a
raw RTFM on the first question, and a PLONK on the second), but there
are still limits, and as far as I'm concerned you're not far from
them. So do yourself and the world a favour, read this:
http://catb.org/~esr/faqs/smart-questions.html

and then this:
http://docs.python.org/tut/tut.html

and next time someone points you to a specific module, have mercy and
*read* the doc before posting.

As far as I'm concerned, I won't anwser any of your questions unless
it's obvious that you have followed these advices (but then I'll be
happy to help if I can).



From Lie.1296 at gmail.com  Thu May 15 13:30:55 2008
From: Lie.1296 at gmail.com (Lie)
Date: Thu, 15 May 2008 10:30:55 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com> 
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com>
Message-ID: <e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com>

On May 15, 4:08?am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > single language compiler instead of three dimensional compiler that
> > > GCC is (cross platform, cross target platform, cross language).
>
> > And to add, I also need to mention that Python doesn't need to be
> > compiled at all,
>
> No language needs compilation - it's an implementation problem, not a
> language problem. Now all the Python's implementations I know do use
> compilation (to byte-code).
> > its py and pyo file is architecture independent.
>
> True, but this is not strictly related to being compiled or not.

It's true, it's implementation problem whether a language is compiled
or not, but what I was emphasizing was that Python's code is
architecture independent at all stages (that is visible to the user
and the programmer), on the other hand, a compiled code is a compiled
code is a compiled code, it cannot be architecture independent without
packing multiple binaries in the same executable (like in Macintosh's
universal binary) or using an emulation (with huge overheads) or at
least using a compatibility layer (which doesn't always work) and all
this is done in the layer that is visible to user and programmer
(programmer having to compile against everything and user having to
download the correct executable) instead of being done in a platform
independent way that interpreted language like Python have.


From bignose+hates-spam at benfinney.id.au  Sat May 24 23:21:31 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 13:21:31 +1000
Subject: class-oriented rather than object-oriented?
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <8763t39ih0.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> does object-oriented refer to that everything(strings, ints etc) are
> all objects? so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

The term is used (and abused) in different ways. The term "object
oriented" is usually an abbreviation of "object-oriented programming",
which contrasts with the older practice of "procedural programming".

It refers to the shift in focus, away from programs that feed data
through a mostly-linear procedural process, and toward programs that
define how objects behave and change state, and interact with other
objects.

> are python functions objects?

Yes.

> can a functional language be object-oriented or an objectoriented
> language be functional?

Yes. Again, it's m ore accurate to say that a language *enables* a
particular style of programming. Python enables procedural
programming, object-oriented programming, and functional programming.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

Classes only exist to define functionality, including the
functionality of creating instances of themselves. It's those
instances that contain state data, and that pass messages back and
forth.

Think of a class as a type definition (and, indeed, types and classes
are now unified in Python since early in the 2.x series), and
instances as specific values of that type. The type defines the
behaviour of its instances, but the instances are what the program
actually uses.

-- 
 \            "Madness is rare in individuals, but in groups, parties, |
  `\         nations and ages it is the rule."  -- Friedrich Nietzsche |
_o__)                                                                  |
Ben Finney


From fiacre.patrick at gmail.com  Thu May 22 12:45:58 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Thu, 22 May 2008 12:45:58 -0400
Subject: Markov Analysis Help
In-Reply-To: <g0lobb$1lu$1@news.xmission.com>
References: <g0lobb$1lu$1@news.xmission.com>
Message-ID: <4835a346$0$11608$607ed4bc@cv.net>

dave wrote:
> Hi Guys,
> 
> I've written a Markov analysis program and would like to get your 
> comments on the code  As it stands now the final input comes out as a 
> tuple, then list, then tuple.  Something like ('the', 'water') ['us'] 
> ('we', 'took')..etc...
> 
> I'm still learning so I don't know any advanced techniques or methods 
> that may have made this easier.
> 
> 
> here's the code:
> 
> def makelist(f):     #turn a document into a list
>     fin = open(f)
>     results = []
>     for line in fin:
>                line = line.replace('"', '')
>         line = line.strip().split()
>         for word in line:
>             results.append(word)
>     return results
> 
> 

What's you data look like?  Just straight text?


> 
> def markov(f, preflen=2):    #f is the file to analyze, preflen is 
> prefix length
>     convert_file = makelist(f)
>     mapdict = {}        #dict where the prefixes will map to suffixes
>     start = 0
>     end = preflen         #start/end set the slice size
>     for words in convert_file:
>         prefix = tuple(convert_file[start:end])     #tuple as mapdict key
>         suffix = convert_file[start + 2 : end + 1]  #word as suffix to key
>         mapdict[prefix] = mapdict.get(prefix, []) + suffix #append suffixes
>         start += 1
>         end += 1
>     return mapdict
> 
> 

What is convert_file??



> 
> def randsent(f, amt=10):     #prints a random sentence
>        analyze = markov(f)
>     for i in range(amt):
>         rkey = random.choice(analyze.keys())
>         print rkey, analyze[rkey],
> 
> 
> The book gave a hint  saying to make the prefixes in the dict using:
> 
> def shift(prefix, word):
>     return prefix[1:] + (word, )

That's not a very helpful hint.

It works if you call it with a tuple and a word --- it shifts off the 
front of the tuple ... so :

shift(('foo','bar') "word")
becomes   ('bar', 'word')

Whoopty doo --- I'm not sure what that accomplishes!!

Unless the author means "pass a list and a randomly pick a word from the 
list" in which case the return statement could be

random.choice(prefix) + (word, )

* shrug *

But -- that's not very Markov ... you'd want a weighted choice of words 
... depending on how you define your Markov chain -- say a Markov chain 
based on part-of-speech or probability of occurrence from a given word-set.

Can you give some more detail??



> 
> However I can't seem to wrap my head around incorporating that into the 
> code above, if you know a method or could point me in the right 
> direction (or think that I don't need to use it) please let me know.
> 
> Thanks for all your help,
> 
> Dave
> 


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 11:25:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 17:25:35 +0200
Subject: the lvalue curse? let's play with this crazy idea ;)
In-Reply-To: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <48246ced$0$24456$426a74cc@news.free.fr>

XLiIV a ?crit :
> I started playing with Python and love it since the very beginning,
> programming using Python is so ...human-like? but one thing returns to
> me almost everytime when I see/write the code
> 
> 
> Let's take a look at two ways of thinking...
> the standard one which is well-known and loved by almost everyone :)
> and that crazy concept below which suprised evan me :wacko:
> 
> <code>
> import time
> 
> ftime = time.time()
> localtime = time.localtime(ftime)
> localtime = list(localtime[:3])

You don't need the call to list here.

> localtime = [str(i) for i in localtime]
> print '-'.join(localtime)
> </code>
> 
> It's harder to read than the below concept, isn't?
> Maybe I didn't used to this way of thinking yet. I hope it'll change
> soon or i'll quit ;)
> 
> 
> <almost code>
> time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
> -> '-'.join()
> </almost code>

print "-".join(map(str, localtime(time.time())[:3]))

or

print "-".join(str[item] for item in localtime(time.time())[:3])


> My example conclusion and not-ansewered-yet question...
> -it's nice to read

Very subjective point here. I'm afraid I don't share your POV.

> and choosing the good names to variables aren't so
> important

> -what is the purpose of the variables here? :)

help debugging ? make code easier to grasp ?

> I realize that there is no chance to implement it,

In Python ? Not a chance, indeed.



From deets at nospam.web.de  Wed May 28 18:10:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 00:10:19 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
	<d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>
Message-ID: <6a63igF34irclU2@mid.uni-berlin.de>


> To be fair, the graphics look cool and the "single-asset 8-by-8
> shotgun cross compiler, written entirely in assembly language" sounds
> impressive from an implementation point of view, in the sense that
> building Deep Blue with nothing but NAND gates would; utterly
> impressive and pointless at the same time. Which goes to prove that
> hardcore hackers don't necessarily make decent language designers.

The number 8 seems to play an important role for Dave - his graphics 
claims to be 8D. I wasn't aware that string-theory was available as 
practical application on my screen already...

Diez


From tjreedy at udel.edu  Thu May  1 12:46:34 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 12:46:34 -0400
Subject: Is vs Equality Operator
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <fvcs56$617$1@ger.gmane.org>


"Good Z" <goodz158 at yahoo.com> wrote in message 
news:706397.16040.qm at web35903.mail.mud.yahoo.com...
| Hello,
| I am having problem in using is. Here is what i am doing.
|
| x=''
| if x is None or x is '':
|        return 1

x is not the singleton value None, nor is it the newly created null string 
object.  It is up to the implementation whether each instance of '' reuses 
one cached (or interned) null string object or creates another.  Don't 
depend on such behavior unless you really mean it.  Same goes for comparing 
ints.

|
| The above statement does not return value 1.
|
| If i changed the above check to
| if x == None or x == '':
|        return 1
| Now it works fine.

x still is not None but does equal in value ''

I recommend here

if x is None or x == '': ...

tjr





From a.harrowell at gmail.com  Thu May 29 10:16:47 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 07:16:47 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
	<6a7p3nF364tmpU1@mid.uni-berlin.de>
Message-ID: <5d1250fa-be50-4645-b94b-e75439b99cb7@m3g2000hsc.googlegroups.com>

On May 29, 2:23 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> TYR wrote:
> > I'm doing some data normalisation, which involves data from a Web site
> > being extracted with BeautifulSoup, cleaned up with a regex, then
> > having the current year as returned by time()'s tm_year attribute
> > inserted, before the data is concatenated with string.join() and fed
> > to time.strptime().
>
> > Here's some code:
> > timeinput = re.split('[\s:-]', rawtime)
> > print timeinput #trace statement
> > print year #trace statement
> > t = timeinput.insert(2, year)
> > print t #trace statement
> > t1 = string.join(t, '')
> > timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> > year is a Unicode string; so is the data in rawtime (BeautifulSoup
> > gives you Unicode, dammit). And here's the output:
>
> > [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> > 2008 (OK, so the year is a year)
> > None (...but what's this?)
> > Traceback (most recent call last):
> >   File "bothv2.py", line 71, in <module>
> >     t1 = string.join(t, '')
> >   File "/usr/lib/python2.5/string.py", line 316, in join
> >     return sep.join(words)
> > TypeError
>
> First - don't use module string anymore. Use e.g.
>
> ''.join(t)
>
> Second, you can only join strings. but year is an integer. So convert it to
> a string first:
>
> t = timeinput.insert(2, str(year))
>
> Diez

Yes, tm_year is converted to a unicode string elsewhere in the program.


From larry.bates at websafe.com`  Tue May 20 19:53:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 20 May 2008 18:53:35 -0500
Subject: persistent deque
In-Reply-To: <OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
Message-ID: <0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>

inhahe wrote:
>   def __init__(self, filename, initial):
> 
> should be
> 
>   def __init__(self, filename, initial=[]):
> 
> (that was the whole reason i put the filename first.)
> 
> sorry.
> 
> 
> 
Defaulting initial to empty list this way is asking for trouble.  You should
default it to None and check for None and reset to empty list.

-Larry


From inhahe at gmail.com  Thu May 22 11:20:56 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 11:20:56 -0400
Subject: persistent deque version 4
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<XF1Zj.78287$%15.22707@bignews7.bellsouth.net>
Message-ID: <DagZj.61385$3v1.14491@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:XF1Zj.78287$%15.22707 at bignews7.bellsouth.net...
>
> 4. can someone tell me if the way i'm using the decorator is sane?  i've 
> never used decorators before. it just seems ridiculous to a) define a 
> lambda that just throws away the parameter, and b) define a meaningless 
> function to pass to that lambda.
>


I thought about the fact that a decorator is merely syntactic sugar, so it 
shouldn't have any closure magic that I can't make myself, and I realized 
that I could have done it the following way:

def makefunc(func):
  def func2(instance, *args):
    result = func(instance, *args)
    instance.save()
    return result
  return func2

for name, func in deque.__dict__.items():
  if (not name.startswith("_")) or name in ('__delitem__', '__setitem__'):
    setattr(pdeque, name, makefunc(func))





From ptmcg at austin.rr.com  Mon May 12 15:10:35 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 12 May 2008 12:10:35 -0700 (PDT)
Subject: py3k concerns. An example
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com> 
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com> 
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org> 
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com> 
	<4810977E.3060509@v.loewis.de>
Message-ID: <201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>

On Apr 24, 9:21?am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > Again, to me, this is a non-issue because I've been able to create a
> > cross-version compatible single codebase for pyparsing. ?But it was a
> > bit dicey there for a while, and I think other module developers/
> > maintainers may not be so lucky.
>
> I'm more optimistic. I tried it for Django, and while the port is not
> complete, it goes really well and supports "basic" operations (i.e.
> the Django tutorial).
>
> Based on your experience, and other reports, I think there is a fair
> chance that you can support a wide range of versions (2.x and 3.x)
> from a single code base for most projects.
>
> > - create (if possible) single cross-version compatible code
> > - forego support of 3.0 users
> > - discontinue pre-2.6 support for future versions of their module
> > - maintain dual codebase
>
> One needs to consider the drawbacks in each case; for the single
> codebase approach, the drawback probably is that readability
> suffers, and the need for testing increases (but it does always
> if you support multiple targets). It also requires expertise to
> create such cross-version code in the first place, but that's
> "just" a learning issue (i.e. you have to keep the rules in mind
> that you want to follow).
>
> Regards,
> Martin

Martin --

Well, my concerns about 3.0 continue to be founded.  Up until now I
have been just reading "What's New" docs, and relying on input from
others as to what changes I will have to make.  Yesterday I downloaded
and installed 3.0a5, and it is clear that there is *no* way to have a
single code base for any but the most trivial module.

The biggest sticking point is the incompatibility of "except" syntax.
Apparently the promise of syntax compatibility in the 3.0a4 docs was
an overstatement.  Syntax can't be conditionalized out with "if
version >= 3:" type code, so I must have separate Python 2.x and
Python 3.x codebases, as will anyone whose modules include exception
handlers.

I also tripped over the conversion from "<iterator>.next()" to
"next(<iterator>)".  Fortunately, this only occurs in my test cases,
so my runtime module will not be affected by extra conditional
testing, just to pick the right code form for the particular Python
version that is running.

Conversion of print from statement to function is definitely more
painful than I thought it would be.  Again, I am fortunate that this
largely affects only my test code, with only minimal impact on my
runtime module.

I continue to struggle with some of the refactoring done in references
to func.func_code, im_self, etc. changing to __code__, __self__, and
so on.  There is a bit of code in Pyparsing that normalizes user
callbacks to a standard call using 3 arguments, and I have to
compensate for functions that have self args, or are callables.  I see
that there is some movement to "get rid of bound methods," but I don't
fully understand how this will be done, nor how I will adjust my code
to compensate.

In fact, I will probably set this effort aside for now, so as to avoid
converting/conditionalizing code to alpha versions of Python, and
having to change them again for later alphas or the final release.

By the way Martin, your work on 2to3 was especially helpful in this
effort - thank you!

In summary, I am adjusting my plans for future support of Python
versions in pyparsing.  As of a pyparsing release some time after
August, I will only support Python 3.0 versions with any new features
or bugfixes, and the pyparsing version that is compatible with Python
2.x will be frozen.

-- Paul


From alokkat at gmail.com  Fri May  2 18:24:06 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Fri, 2 May 2008 18:24:06 -0400
Subject: HTTP Error code Info
Message-ID: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>

Hi
I could get the HTTP error code using
try:
..
except:
..
else:

block.  Is there any better way to get the HTTP Error code using urllib2
lib. Something like know the  exact  response number (200, 404 etc) without
the above block.

Regards
Alok Kumar
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From jeremy+complangpython at jeremysanders.net  Tue May  6 11:26:06 2008
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 06 May 2008 16:26:06 +0100
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <fvptae$2ve$1@gemini.csx.cam.ac.uk>

krumblebunk at gmail.com wrote:

> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.

There is no guaranteed order to the items stored in a dictionary. They can
and will move around as the dict is modified. Have a look at
diveintopython:

http://www.diveintopython.org/getting_to_know_python/dictionaries.html

You'll have to store your keys in a list or tuple to keep them ordered.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From wizzardx at gmail.com  Sat May 10 03:49:34 2008
From: wizzardx at gmail.com (David)
Date: Sat, 10 May 2008 09:49:34 +0200
Subject: Find more than one error at once
In-Reply-To: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <18c1e6480805100049x5835278m515fdf9e2a9a4177@mail.gmail.com>

On Sat, May 10, 2008 at 8:38 AM, Joseph Turian <turian at gmail.com> wrote:
> Is it possible to coax python to find more than one error at once?
>
> Thanks,
>  Joseph
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Sounds like you want to catch and log exceptions.


From wizzardx at gmail.com  Thu May  8 10:02:43 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 16:02:43 +0200
Subject: "prove"
In-Reply-To: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
References: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
Message-ID: <18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>

>  classname.functionname(objectname)

Do you mean something like this?

class myclass:
    @staticmethod
    def myfunction(myobject): pass

myobject = None
myclass.myfunction(myobject)

If so, then you want to check the staticmethod decorator, described here:

http://docs.python.org/lib/built-in-funcs.html

David.


From hdante at gmail.com  Sat May 10 23:05:17 2008
From: hdante at gmail.com (hdante)
Date: Sat, 10 May 2008 20:05:17 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com> 
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com> 
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com> 
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
Message-ID: <8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>

On May 10, 8:22?pm, notbob <not... at nothome.com> wrote:
> On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > ? ?So... in short, you'd need to have been reading a tutorial specific
> > to "shell" scripting...
>
> I have been. ?I'm also trying to learn bash shell scripting, not to mention
> sed/awk, php, etc. ?I should have started this a long time ago, but I'm lazy

 Throw all of this away and learn just python. That will be much
simpler for you.

> and, like I said, I'm not particularly fond of coding. ?Yes, I have learned
> basic C and basic , but never beyond intro. ?Now, I'm doing it because I'm a

 Forget basic and learn python. Later you can learn C.

> geezer and I figure my brain needs more exercise then just blabbing on
> usenet. ?Besides, I've been cruising while using linux for too long and have
> remained low end intermediate. ?Time to get serious. ?Pass the cheat sheets!
>
> nb



From mrmakent at cox.net  Tue May 13 15:02:13 2008
From: mrmakent at cox.net (Mike Kent)
Date: Tue, 13 May 2008 12:02:13 -0700 (PDT)
Subject: list index out of range
References: <mailman.1068.1210704380.12834.python-list@python.org>
Message-ID: <3940419e-952e-4c03-b6d9-b744acff0cc7@l42g2000hsc.googlegroups.com>

On May 13, 2:39 pm, Georgy Panterov <gpante... at yahoo.com> wrote:
>
> def deal_hand(deck):
>     HAND=[]
>     for _ in range(2):
>         i=random.randint(0,len(deck)) #produces a random card from the deck
          ^ Here i can be from 0 thru (the number of cards in the
deck).

>         HAND.append(deck[i]) # appends the card to the players' hand list
                           ^ Here you index into the deck to get a
card.  The legal indexes are 0 thru (number of cards in the deck - 1)
                             What happens if i is (the number of cards
in the deck)?

>         deck.remove(deck[i]) #removes the card from the deck
>     return HAND
>


From mail at timgolden.me.uk  Tue May  6 09:31:58 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 14:31:58 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
Message-ID: <48205DCE.6020402@timgolden.me.uk>

Unknown Hero wrote:
> So basically I am looking for these things:
> 
> 1) Read one subkey from HKEY_LOCAL_MACHINE at a time (I think
> QueryValueEx() is needed here)
> 2) Check if said subkey contains some predetermined string (like 'foo'
> here)
> 3) If the above applies, change the value into another predetermined
> string (like 'moo' here)

Well, I attach a kind of explanatory Noddy example I wrote a few years ago
for someone on the python-win32 list. I think, glancing over it, that it includes
what you need to know, although not necessarily in the right order. I'm happy to 
explain if things aren't clear:

<code>
import _winreg

HKLM = _winreg.HKEY_LOCAL_MACHINE

#
# Set up a registry subtree under HKLM\Software
# which will look like this:
#

#
# TimSoft
# |
# +-- App1
# |
# +-- App2
# |
# +-- App3
#

#
# The [TimSoft] key has a default (ie unnamed) value
# while the Appx keys each have two values:
#   [Registered] - a string Y/N value
#   [Version] - a DWORD value
#

hSoftware = _winreg.OpenKey (HKLM, "Software")
hTimSoft = _winreg.CreateKey (hSoftware, "TimSoft")

_winreg.SetValueEx (hTimSoft, None, 0, _winreg.REG_SZ, "All Tim's Software")

hApp1 = _winreg.CreateKey (hTimSoft, "App1")
_winreg.SetValueEx (hApp1, "Version", 0, _winreg.REG_DWORD, 101)
_winreg.SetValueEx (hApp1, "Registered", 0, _winreg.REG_SZ, "Y")

hApp2 = _winreg.CreateKey (hTimSoft, "App2")
_winreg.SetValueEx (hApp2, "Version", 0, _winreg.REG_DWORD, 202)
_winreg.SetValueEx (hApp2, "Registered", 0, _winreg.REG_SZ, "N")

hApp3 = _winreg.CreateKey (hTimSoft, "App3")
_winreg.SetValueEx (hApp3, "Version", 0, _winreg.REG_DWORD, 303)
_winreg.SetValueEx (hApp3, "Registered", 0, _winreg.REG_SZ, "Y")

#
# NB - no need to do an explicit "write": the Registry uses
#  some sort of caching which eventually catches up with itself,
#  so unless you plan to turn the machine off soon, don't
#  bother with FlushKey or anything like that.
#

#
# Now we start again, as though we were just querying
#

hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey (hTimSoft)
print n_sub_keys, "sub keys", n_values, "values", last_modified, "nanoseconds since 1600!"

#
# Pick up the default value: really should try to
#  interpret the default_type to determine if it's
#  a number or a string or whatever, but...
#
default_value, default_type = _winreg.QueryValueEx (hTimSoft, None)
print "Default value:", default_value

#
# Now, in this case I know (because I created them) that
#  the TimSoft key has three subkeys, each of which has
#  two values. But if I didn't...
#
print
for i in range (n_sub_keys):
  subkey_name = _winreg.EnumKey (hTimSoft, i)
  print subkey_name

#
# Alternatively, if I hadn't done the QueryInfoKey above...
#
i = 0
print
while 1:
  try:
    subkey_name = _winreg.EnumKey (hTimSoft, i)
  except EnvironmentError:
    break
  else:
    print subkey_name
    i += 1

#
# Now, let's use the last key as an example
#  and pick out its values.
#
print
print subkey_name
hAppKey = _winreg.OpenKey (hTimSoft, subkey_name)
i = 0
while 1:
  try:
    name, value, type = _winreg.EnumValue (hAppKey, i)
    print name, value, type
  except EnvironmentError:
    break
  else:
    print "  %s => %s (type %s)" % (name, value, type)
    i += 1

</code>

TJG


From __peter__ at web.de  Thu May 15 10:30:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 15 May 2008 16:30:20 +0200
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <g0hhds$5ro$01$1@news.t-online.com>

Johny wrote:

> Is there a module for reading/modifing db files from Python?

There is a recipe by Raymond Hettinger:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

Peter


From stevegill7 at gmail.com  Wed May  7 02:40:15 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 6 May 2008 23:40:15 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
Message-ID: <bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>

On May 4, 7:22 am, castiro... at gmail.com wrote:
> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > > Is there a good place to look to see where I can find some code that
> > > will help me to save webpage's links to the local drive, after I have
> > > used urllib2 to retrieve the page?
> > > Many times I have to view these pages when I do not have access to the
> > > internet.
>
> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> > --
> > Gabriel Genellina
>
> A lot of the functionality is already present.
>
> import urllib
> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> from htmllib import HTMLParser
> from formatter import NullFormatter
> parser= HTMLParser( NullFormatter( ) )
> parser.feed( open( 'main.htm' ).read( ) )
> import urlparse
> for a in parser.anchorlist:
>     print urlparse.urljoin( 'http://python.org/', a )
>
> Output snipped:
>
> ...http://python.org/psf/http://python.org/dev/http://python.org/links/http://python.org/download/releases/2.5.2http://docs.python.org/http://python.org/ftp/python/2.5.2/python-2.5.2.msi
> ...

How can I modify or add to the above code, so that the file references
are saved to specified local directories, AND the saved webpage makes
reference to the new saved files in the respective directories?
Thanks for your help in advance.


From yves at zioup.com  Sun May 11 23:40:03 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 03:40:03 GMT
Subject: anonymous assignment
In-Reply-To: <7xmymwuu25.fsf@ruckus.brouhaha.com>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
Message-ID: <n_OVj.133864$Cj7.40861@pd7urf2no>

Paul Rubin wrote:
> Yves Dorfsman <yves at zioup.com> writes:
>> import time
>> y, None, d, None, None, None, None = time.localtime()
>>
>> I know you can't assign anything to None, but I'm sure you get what I
>> mean, a special keyword that means I don't care about this value.
> 
> You can just use a variable name than you ignore.  It's traditional to
> use _ but it's not a special keyword, it's just a another variable name:
> 
>    y, _, d, _, _, _, _, _, _ = time.localtime()

But you still have have a variable that's using memory for nothing. I find 
this unsatisfactory... I don't want to compare languages, but I find the 
perl "undef" elegant.


Yves.
http://www.SollerS.ca


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:03:46 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:03:46 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <48315082$0$24599$426a74cc@news.free.fr>

Vicent Giner a ?crit :
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language

cf my answer to you and Henrique on this.


> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C,  but I like Python more.

Then use it.

> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

In which way is this a problem here ? I thought your thesis was about 
algorithm, not about implementation optimisation ? And if it's the 
later, then even C might sometimes be too high level - you should drop 
to assembly language.

> * I don't know how likely it is to find libraries in Python related to
> my research field.

I can't tell but you'd be surprised by the quantity of available Python 
libs.

> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Don't know if this answers your question, but it seems that at least 
some authors consider it a good choice:
http://www.oreilly.com/catalog/9780596529321/

All code examples in this books are in Python - very badly written 
Python, alas...

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...

Hem... Obviously, most people here will have a little biased, you know ?-)



From gagsl-py2 at yahoo.com.ar  Thu May 15 20:54:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 21:54:37 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
Message-ID: <op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 14:21:34 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> So, I have this particular method, generate_chat_dir_string, which should
> generate a string in the following format:
>  "md5hexstring-day-month-year-hour-minute"
> This string will be used to create a directory in the filesystem.

There is an issue here - how much behavior is considered in the public  
interfase, and how much is just an implementation detail. You only have to  
test the public interfase, what the method promises to do, NOT any  
internal implementation details.

I don't think that the md5 string be part of the interfase - probably it's  
enough to promise different directory names for different combinations of  
"user" and "atendente". A separate question: do we promise to generate the  
same directory name for the same set of user/atendente, or not? (assuming  
the time part is constant).
For the time part - is that format *required*, or just a means to obtain  
separate directory names, even for the same set of users, based on time?
Or perhaps we *only* want to guarantee different results for different  
function calls, and ALL that stuff involving users and time are just  
implementation details?
Depending on how you answer those questions, you write tests in a way or  
another way.

> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
> methods of the Chat class, including this one. However, an issue just  
> popped
> up, this is the test code:
>
>
>    1.   def test_generate_chat_dir_string(self):
>    2.         import md5
>    3.         import random
>    4.         import datetime
>    5.         md5_handler = md5.new()
>    6.         users = [{"user":"pedro","atendente":False},{
>    "user":"jo?o","atendente":True}]
>    7.         #salt = random.random().to_s()
>    8.         #md5_handler.update(salt)
>    9.         now = datetime.datetime.now()
>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>    11.         for user in users:
>    12.             md5_handler.update(user["user"])
>    13.
>    14.
>    15.         seed = md5_handler.hexdigest()
>    16.
>    17.         final_string = seed + "-" + ts
>    18.
>    19.         method_generated_string =  
> self.chat.generated_chat_dir_string
>    (users,seed)
>    20.
>    21.         self.assertEquals(final_string,method_generated_string)

Looks like you have just copied the generated_chat_dir_string  
implementation here - that's not the point of testing, at least if you  
relax the restrictions as I said above.

Supose the specification says, instead: the resulting directory must  
differ whether the set of users/atendente differs, or the request time is  
separated more than 1 minute apart.

Then the tests should cover:
- build a set of users and choose a point in time
- generate dir1 with that set of users and that time
- modify the set of users, generate dir2 and assert that it differs from  
dir1
   Repeat other modifications, including:
     one more user
     one less user
     same users, changing "atendente" for some
     only one user
     empty set of users (if it should raise an exception, check that it's  
actually raised)
     what happens when only the *order* of users is changed? (why is it a  
list instead of a set?)
     other conditions that might fail, perhaps based on your knowledge of  
the implementation (it's ok to test special cases that are special only  
because of how it is implemented, as far as you only test what is required  
by the specification). By example, suppose the md5 function is absolutely  
dumb and only accepts strings at most 32 characters long; test with a  
username longer than that.

- Then, increment the time less than a minute and verify you *can*  
generate dir3 (our specification doesn't *require* it to be the same, so  
don't check more than required)
- increment the time more than a minute, generate another dir and verify  
it's different.

Notice that, to be able to make all those tests involving the *same* time  
we should process them very quickly so the minute part doesn't change (but  
it even might fail when we're near the minute end). Worse, the last test  
woul require to *wait* more than one minute to see the change...
That's horrible - so we write the function in a way that *helps* testing.  
By example, adding another argument: the time to be used, which defaults  
to None meaning the current time.

def generated_chat_dir_string(self, users, curtime=None):
     if curtime is None: curtime = time.time()
     ...

(usually curtime is unused, but we do use it for testing)

I hope it's more clear now how to define your tests.

-- 
Gabriel Genellina



From sbour at niaid.nih.gov  Fri May 30 19:40:39 2008
From: sbour at niaid.nih.gov (Stephan Bour)
Date: Fri, 30 May 2008 16:40:39 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
Message-ID: <Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>

Lew wrote:
} John Thingstad wrote:
} > Perl is solidly based in the UNIX world on awk, sed, bash and C.
} > I don't like the style, but many do.
}
} Please exclude the Java newsgroups from this discussion.

Did it ever occur to you that you don't speak for entire news groups?


Stephan. 




From salmoni at gmail.com  Thu May 15 00:08:45 2008
From: salmoni at gmail.com (Alan J. Salmoni)
Date: Wed, 14 May 2008 21:08:45 -0700 (PDT)
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
Message-ID: <d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>

I'm not sure if this is exactly what you're after, but try looking
into the 'code' module.

It's fairly easy to make an interactive interpreter that runs within
your program. If you import your programs variables into
__main__.__dict__, you can have access to them which can be funky. You
can even override the showtraceback method to catch various exceptions
and do daft things like adding new methods to strings. I guess it
would even be possible to have the commands compared to a list of
commands and keywords to build a restricted interpreter, though how
secure this would be against a determined attack is another matter.

Alan

On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
> The next release of pydb will have the ability to go into ipython from
> inside the debugger. Sort of like how in ruby-debug you can go into
> irb :-)
>
> For ipython, this can be done pretty simply; there is an IPShellEmbed
> method which returns something you can call. But how could one do the
> same for the stock python interactive shell?
>
> To take this out of the realm of debugging. What you want to do is to
> write a python program that goes into the python interactive shell -
> without having to write your own a read/eval loop and deal with
> readline, continuation lines, etc.
>
> The solution should also allow
>  - variables/methods in the calling PYthon program to be visible
>    in the shell
>  - variables set in the interactive (sub) shell should persist after the shell
>    terminates, although this is a weaker requirement. POSIX subshells
>    for example *don't* work this way.
>
> There has been much written about how to embed Python from C, so I
> suppose this may offer one way. And at worst, I could write
> a C extension which follows how C Python does this for itself.
>
> But is there a simpler way?
>
> Thanks.



From gagsl-py2 at yahoo.com.ar  Fri May  9 02:22:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:22:37 -0300
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <op.uavinzs4x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:47:49 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> I see the point of the OP. Couldn't the new-line be used as an  
> equivalent of   ':', for example, do you find this difficult to read:
>
> if a == 3
>    do_something()
>
>
> if a == 3: do_something()
>
>
> And surely, it should be easy to parse by the compiler.

Yes, it could be done, there are no technical reasons to always force to  
use ":". But AFAIK the main reasons to keep ":" are internal consistency  
(an inner block always starts with ":"; incidentally, that's easier to  
handle for editors) and legibility (the ":" stands for itself and has a  
meaning)

-- 
Gabriel Genellina



From vivainio at gmail.com  Wed May 21 02:05:36 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 21 May 2008 06:05:36 GMT
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
	<e530ee93-ab63-4d2a-a52f-0d8ff4895af8@a32g2000prf.googlegroups.com>
Message-ID: <zlqkkx92.fsf@gmail.com>

Simon Forman <sajmikins at gmail.com> writes:

> This is not exactly an answer to your proposal, I know, but FWIW
> Ipython has exactly this capability.

Yes.

When you %run a scripts and get exception, you can launch post-mortem
pdb on it by typing %debug.


From arnodel at googlemail.com  Tue May 13 16:49:42 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 21:49:42 +0100
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <m263tiapzt.fsf@googlemail.com>

yguan08 at gmail.com writes:

> I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
>
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> fsize = os.path.getsize(fullpath)
>
>
> WindowsError: [Error 206] The filename or extension is too long:
>
> The same thing with os.stat(fullpath).
>
> I tried using the relative path, but it does not work with the message
> fname not found.
>
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)
> filesize = os.path.getsize(fname)
>
> Is there a walk around of this?

Disclaimer: I am not a Windows user

Might this help?  http://forum.altap.cz/viewtopic.php?p=2353

Alternately, use a better OS :-)

-- 
Arnaud


From alangrow at gmail.com  Sat May 17 16:31:18 2008
From: alangrow at gmail.com (alan)
Date: Sat, 17 May 2008 13:31:18 -0700 (PDT)
Subject: waiting on an event blocks all signals
References: <mailman.1283.1211054805.12834.python-list@python.org>
Message-ID: <a0dae4f6-090b-4990-b870-56b01652d7c0@m3g2000hsc.googlegroups.com>

On May 17, 3:06 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Sat, 17 May 2008 12:49:54 -0700, John Schroeder <jschr... at gmail.com> wrote:
> >On Sat, May 17, 2008 at 12:32 PM, alan <alang... at gmail.com> wrote:
>
> >> This ignores CTRL-C on every platform I've tested:
>
> >> python -c "import threading; threading.Event().wait()"
> >> ^C^C^C^C
>
> >> It looks to me like all signals are masked before entering wait(). Can
> >> someone familiar with the internals explain and/or justify this
> >> behavior? Thanks,
>
> >^C only kills the main thread.  Use Control-Break to kill all threads.
>
> Look at that program.  It's single-threaded.  Where do you think the ^C
> is going? :)
>
> Jean-Paul

Look at this program which is also "single-threaded." Clearly,
python's doing something special. I'm hoping someone can tell me what,
and why.

/*
  pthreadsig.c

  $ gcc pthreadsig.c -lpthread
  $ ./a.out
  ^C
  $
*/

#include <pthread.h>

int main(int argc, char** argv) {
  int rc = 0;

  pthread_mutex_t mtx;
  pthread_cond_t cond;
  pthread_mutex_init(&mtx, 0);
  pthread_cond_init(&cond, 0);

  pthread_mutex_lock(&mtx);
  rc = pthread_cond_wait(&cond, &mtx);
  pthread_mutex_unlock(&mtx);

  return rc;
}


From martin at v.loewis.de  Sun May 18 02:34:47 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 18 May 2008 08:34:47 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <U8OXj.6920$255.269@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net><e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<mailman.1287.1211058342.12834.python-list@python.org>
	<U8OXj.6920$255.269@bignews8.bellsouth.net>
Message-ID: <482FCE07.5020305@v.loewis.de>

> VS2005 seems to be officially supported.

That impression is incorrect. There is the PCbuild8 directory, but
it isn't maintained or tested in a systematic way. Users of it may
need to adjust it before it can do something useful.

Regards,
Martin


From mnikhil at gmail.com  Wed May 21 19:15:19 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 22 May 2008 04:45:19 +0530
Subject: simple way to touch a file if it does not exist
Message-ID: <g12aee$jss$1@registered.motzarella.org>

what are the simple ways?
I could think of os.open(), os.exec(touch file)

are there any simpler methods?


From wxPythoner at gmail.com  Tue May 13 18:08:26 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 15:08:26 -0700 (PDT)
Subject: What is  self.file = file  for?
Message-ID: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>

Hello!

I have trouble understanding something in this code snippet:

class TextReader:
    """Print and number lines in a text file."""
    def __init__(self, file):
        self.file = file
        .
        .
        .


When would you do a thing like  self.file = file  ? I really don't
find an answer on this. Please help me understand this.


From foul_ole_ron1 at yahoo.com  Fri May 23 04:45:08 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 01:45:08 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <a8b6eaf4-fe73-46fa-b465-3e7ed34418e7@m73g2000hsh.googlegroups.com>

On 23 mei, 09:12, Marc Oldenhof <foul_ole_r... at yahoo.com> wrote:
<snip my post>

Thanks for the reactions, I'll use the "from numpy import <individual
stuff>" from now on :)

Marc


From roy at panix.com  Sat May 24 09:44:22 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:44:22 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
Message-ID: <roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>

In article 
<af66b0d4-f77d-4d54-8ee0-94592497d2f2 at l64g2000hse.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> Also, like others, I have had wonderful experiences of trying to track
> down test failures that depend on the order that tests run in. Having
> interdependencies between tests is a recipe for madness...

I agree that tests should not depend on each other, but sometimes it's 
still useful to have the tests run in a certain order for reporting 
purposes.

If you're doing requirements tracking, it's nice to have the tests execute 
in the same order as the requirements are listed.  It makes interpreting 
the output easier.  Sure, you could give the test cases names like 
"test_fr17.3a" and write your own getTestCaseNames(), but just putting them 
into the file in the order you want them to run is easier.  And making 
things easy is what this is all about.


From brian.darkblueb at gmail.com  Sat May  3 20:01:44 2008
From: brian.darkblueb at gmail.com (darkblueB)
Date: Sat, 3 May 2008 17:01:44 -0700 (PDT)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
	<fvitsq$15ti$3@news.mtu.ru>
Message-ID: <d2dca1d3-9a41-4862-a695-ba2fbf93e6a6@h1g2000prh.googlegroups.com>

On May 3, 4:52?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> Try run 'python setup.py build_ext -f' to force setup.py to rebuild
> everything with JPEG. And 'sudo python setup.py install' should install
> PIL with JPEG support.

yes, that works

(the self test still gives misleading results ?)
but running some sample program works fine

thanks


From __peter__ at web.de  Tue May 13 04:55:44 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 10:55:44 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
Message-ID: <g0bl2e$ft9$00$2@news.t-online.com>

dingo_1980 at yahoo.com wrote:

> I was trying to create a sparse matrix using scipy.sparse (100000 X
> 100000) with just the first row and first column filled with ones.
> Lets call this matrix Asp. This is how I created Asp
> 
> from scipy import sparse
> Asp = scipy.lil_matrix(100000,100000)
> for i in range(100000):
>    Asp[i,0] = i
>    Asp[0,i] = i
> Bsp = (Asp.tocsr())*(Asp.tocsr())
> 
> This multiplication to get Bsp is taking a long time (to the order of
> over an hour). Is there some other way of storing such huge sparse
> matrices and doing their multiplications or is this the most optimal
> way?

I think sparse matrices don't help here because the result isn't sparse.
Looking at your example I think you can see that B[i,k] == A[i,0]*A[0,k] for
i,k != 0,0, so for a matrix of that structure you might get away with
something like

# use at your own risk
import numpy

N = 10**4 # I get a MemoryError for a bigger exponent
b = numpy.array(range(N))
a = numpy.zeros((N, N)) + b
a *= a.transpose()
a[0,0] = (b*b).sum()
print a

But for expert advice you better ask on the numpy mailing list...

Peter


From mensanator at aol.com  Tue May 20 15:45:29 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 20 May 2008 12:45:29 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>

On May 20, 2:18?pm, Bob Greschke <b... at passcal.nmt.edu> wrote:
> This MUST have been asked before, but I can't seem to Google the right
> thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>
> Thanks!
>
> Bob

>>> import os.path

>>> dl = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> drives = ['%s:' % d for d in dl if os.path.exists('%s:' % d)]
>>> drives
['C:', 'D:', 'F:', 'G:', 'H:', 'I:', 'J:', 'M:', 'N:', 'O:', 'P:',
'Q:', 'R:', 'S:', 'T:', 'U:', 'X:', 'Y:']



From gagsl-py2 at yahoo.com.ar  Sat May 10 20:47:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 21:47:10 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
Message-ID: <op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> given that I already have Python2.5 installed & will install Python2.4, will
> copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
> i think the answer is "no", but still asking. is it package specific ?
>
> does it matter if the packages were egg drops ?

Packages containing only .py modules ("pure" packages) are OK; packages using C extensions (.dll, .pyd) have to be rebuilt (or you have to download the binaries for the other Python version).

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Thu May 22 08:29:20 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 05:29:20 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>

On May 21, 10:34 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 20, 7:05 pm, Collin <collinye... at shaw.ca> wrote:
>
> > Personally, FT is a bit meh to me. The way you issue your statements I
> > always think something is wrong, mainly because when I want to define,
> > say, x, in python I'd go:
>
> > x = "whatever"
>
> > Instantly noting that I defined x. While in Flaming Thunder I'd have to
> > type:
>
> > Set x to "whatever"
>
> > It just feels wrong.
>
> Actually, it felt wrong to me when I first started working on Flaming
> Thunder because I've been programming for decades and have had all of
> the programming idioms burned into my brain.
>
> But after getting input from children and teachers, etc, it started
> feeling right.
>
> For example, consider the two statements:
>
>      x = 8
>      x = 10
>
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".

So it seems like you're designing a language for non-programmers.
That's good, I've never heard about anyone so interested in teaching
programming for kids and non-programmers. But in that case, you
shouldn't even be comparing it to Python.

> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).

That stops being confusing after a few weeks of programming.
(Actually, IMO, it's not confusing, but it's tricky because sometimes
it's a hard typo to find. Though that will only be a syntax error in
Python.) But again, that'll be great for the kids! ;-)

> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.

Learning the symbols of a programming language is one of the first and
minimum requirements to learning any particular programming language--
we call that the "syntax" of the language.

> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:

>      Set x to 8.

> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:

> Set QuadraticEquation to a*x^2 + b*x + c = 0.

So it seems that you got a great language for math teachers, non-
mathematicians, non-programmers, and kids! (what a great arsenal of
people...). Maybe if I have a kid someday I'll teach him Flaming
Thunder! (just kidding, you prick).


From bearophileHUGS at lycos.com  Sat May 17 16:05:54 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 17 May 2008 13:05:54 -0700 (PDT)
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
	<0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
	<g0mvc2$sic$1@news.xmission.com>
Message-ID: <64b58740-b778-4b8f-b810-b4bf8cf1b4ed@c65g2000hsa.googlegroups.com>

dave:
>Can you have doctests on random functions?

Yes, you can add doctests to methods, functions, classes, module
docstrings, and in external text files.

Bye,
bearophile


From Sumon.Sadhu at gmail.com  Thu May  8 15:21:07 2008
From: Sumon.Sadhu at gmail.com (sharpshoot)
Date: Thu, 8 May 2008 12:21:07 -0700 (PDT)
Subject: Write a python blog/website?
Message-ID: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>

Hi Guys,

I thought this would be really interesting to people who blog who
might be able to help us. This year we built a product called
Snaptalent, emanating from Paul Graham's Y Combinator, which allows
bloggers to monetize using tasteful and relevant job advertising.

When we found out Joel Spolsky makes over $200k a year from Job
Advertising, we decided to do something about helping publishers who
write great content, who don't make a lot of money to make money from
relevant job ads as opposed to some of the irrelevance shown by
adsense.

We also decided that in addition making the jobs ads solely text based
that we would allow for tasteful widget formats with images (to show
off cool offices), video (to show off the people). Also we decided to
make pretty widgets, which when clicked upon, showed a full page job
ad in a lightbox thus not taking users away from the page.

Also for a lot of audiences job ads would be more relevant and that
great job ads are also great content (like the job ads in the
economist).

Things have gone really well and since March, this year we've worked
with a test group of about 45 sites and 30 or so companies to really
get this right. Now we're ready to add a 100 more sites for the next
phase to improve what we've done, so we need your help to get us
there!

You can see our widgets some high profile sites like

Hacker News: http://news.ycombinator.com/jobs
Steve Yegge: http://steve-yegge.blogspot.com
Raganwald: http://weblog.raganwald.com

and we've attracted some great initial reviews:

http://paulstamatiou.com/2008/03/15/snaptalent-compelling-job-ads
http://www.pchristensen.com/blog/articles/tasteful-monetization-and-the-passionate-developer-community/

We're keen to continue growing the network again and are planning to
restrict this to another 100 blogs for the next phase.

I would love to extend out an invitation to folk who

*  Write good quality content
* Update regularly and have some traffic

If you'd like to participate the URL to get a widget here:
http://snaptalent.com/widgets/new

Now the rates may not be as high as they will be in the future, and
there may be stuff we need to fix, but together with your feedback we
can iterate on what we've done & make something thats really valuable
for the programming community.

Please feel free to forward this to someone who you know may benefit
or if you have any questions, don't hesitate to contact me.

Thanks in advance for your help!

Sumon

Co-founder
Snaptalent
sumon at snaptalent.com


From deets at nospam.web.de  Sun May 25 07:28:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:28:19 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69t0qlF356llmU1@mid.uni-berlin.de>

Roy Smith schrieb:
> In article 
> <af66b0d4-f77d-4d54-8ee0-94592497d2f2 at l64g2000hse.googlegroups.com>,
>  Fuzzyman <fuzzyman at gmail.com> wrote:
> 
>> Also, like others, I have had wonderful experiences of trying to track
>> down test failures that depend on the order that tests run in. Having
>> interdependencies between tests is a recipe for madness...
> 
> I agree that tests should not depend on each other, but sometimes it's 
> still useful to have the tests run in a certain order for reporting 
> purposes.

Then sort your report. Seriously. A test-outpt shoud be in a way that 
delimits individual testresults in a way that makes them easily 
extractable. Then if you want them to be ordered for e.g. diff'ing - 
sort them.

Diez


From cashm491 at gmail.com  Fri May 23 10:11:34 2008
From: cashm491 at gmail.com (cashm491 at gmail.com)
Date: Fri, 23 May 2008 07:11:34 -0700 (PDT)
Subject: Genuine Lifetime Income!! Earn!! = 10,000 US Dollars per month 
	without Investmen
Message-ID: <05c8be6c-37c4-46b1-b3ee-2e5f38386d34@y18g2000pre.googlegroups.com>

You Have Finally Found It Genuine Lifetime Income!!
Earn!! ? 10,000 US Dollars per month without Investment
http://seniorfriendfinder.com/go/g970599-pmem
Earn!! ? 10,000 US Dollars per month without Investment
By working only one hour per day from the cyber caf? or PC


From victorsubervi at gmail.com  Tue May 13 10:51:15 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Tue, 13 May 2008 09:51:15 -0500
Subject: Custom Classes?
In-Reply-To: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805130751h30e264a0j3e5d2097eba3918e@mail.gmail.com>

On 5/9/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> Okay, trying this again with everything working and no ValueError or any
> > other errors, here we go:
> >
>
> getpic = "getpic" + str(w) + ".py"
> >
>
> Why do you *generate* the getpicNN.py? It contains always the same code,
> why don't you just use a single getpic.py?
>
> and then surf to:
> > http://whatever.url/getpic20.py?id=6&x=1
>
>
Because I initially could not get it to work that way...and then I forgot
about it. But you are right. That is what I need to do. So I will work on
that.

Uhm, I don't think there is something specific for this list. There is an
> article from E.S.Raymond "How to ask questions the smart way?" that you can
> find with Google


Thanks. Got it.
Victor
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From tjreedy at udel.edu  Thu May  8 17:09:11 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 17:09:11 -0400
Subject: Feature suggestion: sum() ought to use a compensated
	summationalgorithm
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1><mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
Message-ID: <fvvq5m$5sq$1@ger.gmane.org>


"Szabolcs Horv?t" <szhorvat at gmail.com> wrote in message 
news:fvmdg1$1e4p$1 at toralf.uib.no...
| Gabriel Genellina wrote:
| >
| > Python doesn't require __add__ to be associative, so this should not be 
used as a general sum replacement.
|
| It does not _require_ this, but using an __add__ that is not commutative
| and associative, or has side effects, would qualify as a serious misuse,

seq + seq is not commutative ;-) 





From pavlovevidence at gmail.com  Thu May  1 14:56:20 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 11:56:20 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
Message-ID: <52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>

On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> > IMO .ini-like config files are from the stone age. The modern
> >> > approach is to use YAML (http://www.yaml.org).
>
> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and
> >> so comprehensively and completely fails to achieve its stated main goal
> >> of being "readable by humans", that I had assumed it was an April Fool
> >> along the lines of Intercal or brainf***.
>
> > YAML, ISTM, took a simple concept that worked for small, straightforward
> > data, and tried to make into a format that could anything anywhere, with
> > disastrous results.  It's not unlike Perl in this regard.  It's quite
> > ridiculous.
>
> > My recommendation to the OP would be:
>
> > If you intend to write a GUI that completely sets all the options, use
> > XML.  You can bet there are some users who would prefer text editing
> > options files, and XML, while not the most readable format available, at
> > least gives users the option.
>
> > If you don't intend to write a GUI to do that, write a simple text file
> > parser (if the options are simple), use ConfigParser, or use a Python
> > file that you exec.
>
> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> > ApplicationData/Appname/config.ext on Windows.  I don't recommend using
> > the Windows registry to store options; use it to modify Windows behavior
> > (like file associations) but keep your own program's options in your own
> > file.
>
> If you don't like YAML, use JSON or something similar -- XML is overkill
> and .INI is too limited.


I don't think you know the OP's requirements enough to know whether
INI or XML is suitable. You're welcome to suggest alternatives but
what I suggested is fine.

As for XML being overkill for anything, I highly disagree. XML is
suitable for the smallest tasks.  These days I use XML for almost all
my data exchange needs: including conf files.  Elementtree makes it
possible to process XML and pull out some typical data in ten or so
lines of code.  What could possibly be overkill about that?


Carl Banks


From jharry at EmeryWeiner.org  Thu May  1 20:21:08 2008
From: jharry at EmeryWeiner.org (Jordan Harry)
Date: Thu, 1 May 2008 19:21:08 -0500
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and
	'NoneType'
Message-ID: <EDD39CB66D855D488AA9140DABFF161503779D@Hermes.EmeryWeiner.org>

I'm trying to write a simple program to calculate permutations.  I created a file called "mod.py" and put the following in it:
 
def factorial(n):
    a = n
    b = n
    while a>0 and b>1:
        n = (n)*(b-1)
        b = b-1
 
def perm(n, r):
    a = factorial(n)
    b = factorial(n-r)
    q = a / b
    print q

Then I went back to IDLE and input the following:
 
>>> import mod
>>> mod.perm(5, 4)
 
I recieved the following error message:
 
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    mod.perm(5, 4)
  File "C:\Python25\mod.py", line 27, in perm
    q = a / b
TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'
 
I have no idea how to fix it.  I'm pretty new to Python.  I have IDLE 1.2.2 and Python 2.5.2,
 
Please help.


From matiassurdi at gmail.com  Sat May 10 12:40:25 2008
From: matiassurdi at gmail.com (Matias Surdi)
Date: Sat, 10 May 2008 18:40:25 +0200
Subject: Now what!?
In-Reply-To: <68m0i1F2t8265U1@mid.uni-berlin.de>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
Message-ID: <g04j5p$suo$1@ger.gmane.org>

Diez B. Roggisch escribi?:
> notbob schrieb:
>> Grrr....
>>
>> I'm following A Byte of Python and into the while loops chap.  I cp/paste
>> while.py to a file and give 777 perms.  I mv while.py to while and run 
>> it (./while)
>> as a standalone script.  I get errors.
>>
>> Here is the script:
>>
>> while.py
>>
>> http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html
>>
>>
>> When I run it as.....
>>
>> $ python while
>>
>> .....it works perfect.  But, if I run it simply as.....
>>
>> $ ./while
>>
>> .....I get this:
>>
>> $ ./while
>> number: illegal number: =
>> ./while: line 6: running: command not found
>> ./while: line 9: syntax error near unexpected token ('
>> ./while: line 9:         guess = int(raw_input('Enter an integer : '))'
>>
>> Why does it work one way and not the other.  If I run the simple hello 
>> world
>> script the same way ($ ./helloworld) and it works fine.  Same shebang, 
>> same
>> dir, same permission, etc.  I even meticulously indented everything
>> perfectly by hand.  What am I missing?
> 
> I'm pretty sure you misse the correct shebang - the shell tries to 
> execute your script as shell-script, instead of invoking the interpreter.
> 
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

Add #!/path/to/bin/python on the first line of your script.

Also should work with:
#!/usr/bin/env python




From deets at nospam.web.de  Sat May 10 12:24:24 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 10 May 2008 18:24:24 +0200
Subject: Now what!?
In-Reply-To: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
Message-ID: <68m0i1F2t8265U1@mid.uni-berlin.de>

notbob schrieb:
> Grrr....
> 
> I'm following A Byte of Python and into the while loops chap.  I cp/paste
> while.py to a file and give 777 perms.  I mv while.py to while and run it (./while)
> as a standalone script.  I get errors.
> 
> Here is the script:
> 
> while.py
> 
> http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html
> 
> 
> When I run it as.....
> 
> $ python while
> 
> .....it works perfect.  But, if I run it simply as.....
> 
> $ ./while
> 
> .....I get this:
> 
> $ ./while
> number: illegal number: =
> ./while: line 6: running: command not found
> ./while: line 9: syntax error near unexpected token ('
> ./while: line 9:         guess = int(raw_input('Enter an integer : '))'
> 
> Why does it work one way and not the other.  If I run the simple hello world
> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
> dir, same permission, etc.  I even meticulously indented everything
> perfectly by hand.  What am I missing?

I'm pretty sure you misse the correct shebang - the shell tries to 
execute your script as shell-script, instead of invoking the interpreter.

Diez


From dickinsm at gmail.com  Wed May 21 14:38:35 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Wed, 21 May 2008 11:38:35 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
Message-ID: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>

On SuSE 10.2/Xeon there seems to be a rounding bug for
floating-point addition:

dickinsm at weyl:~> python
Python 2.5 (r25:51908, May 25 2007, 16:14:04)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = 1e16-2.
>>> a
9999999999999998.0
>>> a+0.999     # gives expected result
9999999999999998.0
>>> a+0.9999   # doesn't round correctly.
10000000000000000.0

The last result here should be 9999999999999998.0,
not 10000000000000000.0.  Is anyone else seeing this
bug, or is it just a quirk of my system?

Mark


From castironpi at gmail.com  Fri May 16 10:59:41 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:59:41 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
	<57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com> 
	<52d91619-d8bf-47cb-8a69-5604f71dc45c@e39g2000hsf.googlegroups.com>
Message-ID: <edfcb71d-dfce-45b7-8cfe-1bae9f685e03@b64g2000hsa.googlegroups.com>

On May 16, 9:10?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:35?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
> > > 42.desthuilli... at websiteburo.invalid> wrote:
> > > > Kay Schluehr a ?crit :
>
> > > > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > > > >> Hello all,
>
> > > > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > > > >> It appeared to be the following:
>
> > > > >> class A(object):
> > > > >> ? ? pass
>
> > > > >> print min(1.0, A())
>
> > > > >> which is accepted by Python even though the A() object is not numerical in
> > > > >> nature.
>
> > > > >> The cause of this behavior seems to be the compare operation of the object
> > > > >> class.
>
> > > > >> Is there a way to disable this behavior in Python (other than deriving a new
> > > > >> 'object-like' class that doesn't do comparisons?)
>
> > > > > Are you sure you don't want to use a statically typed language that
> > > > > captures all type errors just by inspecting your source code?
>
> > > > This is not necessarily a static vs dynamic typing problem. The
> > > > following code will raise a TypeError for very good reasons:
>
> > > > ? ? print 1.0 + A()- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > I question the real-world examples of coercion, casting, and
> > > upcasting. ?C insists that defining by operator, which may or may not
> > > relate to system, is the only legal move. ?I doubt operator+ is well-
> > > defined on non-ideal structures. ?Rationals are not floats, but system
> > > got checked. ?Define concurrency.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I would be bouncing localcy and remoticy. ?What word's on the bar?- Hide quoted text -
>
> > - Show quoted text -
>
> Can you suffixize words? ?I have corner, cornercy, lunacy, emphatic,
> emphasize, a value of Y, orderings, say, remoticy, & cross. ?Come do
> graphics. ?Anybody speak?
>
> For verbs, I have: say, speak, see, talk, and stack. ?Pretty
> harmless. ?Still here?- Hide quoted text -
>
> - Show quoted text -

That's stay tuned I'M BARTENDER.  Is that a space BAR ZOOP.



From dmkim at mktec.co.kr  Sun May 25 22:19:03 2008
From: dmkim at mktec.co.kr (bbmerong)
Date: Sun, 25 May 2008 19:19:03 -0700 (PDT)
Subject: jkl
Message-ID: <865e1b89-4937-4e88-8d2e-6e270ef1f379@v26g2000prm.googlegroups.com>

jll


From geonomica at gmail.com  Thu May 22 18:33:42 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 15:33:42 -0700 (PDT)
Subject: ctypes help
Message-ID: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>

Hy,
I need help about use dll with ctypes. I've compiled my dll C library
and I copied it in c:\windows\system32. When I load it with
"myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
python don't see the dll function. with dir(myDLL) I've only this:
['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
'__getattr__', '__getattribute__', '__getitem__', '__hash__',
'__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
'_name']

Could anybody help me

Thanks

Gianluca


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 07:30:03 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 13:30:03 +0200
Subject: A quick question
In-Reply-To: <mailman.1680.1211971404.12834.python-list@python.org>
References: <g1jbtt+bf6m@eGroups.com>
	<mailman.1680.1211971404.12834.python-list@python.org>
Message-ID: <483d4235$0$20523$426a74cc@news.free.fr>

D'Arcy J.M. Cain a ?crit :
> On Wed, 28 May 2008 10:25:01 -0000
> "James" <cobrocks at msn.com> wrote:
>> Hey everyone,
>>
>> I just started using python and cant figure this out, I'm trying to 
>> make a program where someone types in a word and the program gives it 
>> back backwards.  For example if the person puts in "cat" I want the 
>> program to give it back as "tac" and what it does is prints out 3,2,1.  
>> How can I get these integers to print as letters?  This is what I have,
>>
>> word = raw_input("Type a word:")
>> start = len(word)
>>
>> for letter in range(start, 0, -1):
>>     print letter  
> 
> Ignore my previous message.  Too early.  Here is your script:
> 
> word = raw_input("Type a word:")
> for i in range(len(word), 0, -1):
>     print word[i]

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
IndexError: string index out of range

sequence indices are zero-based, so you want to start at len(word) -1. 
And the range upper limit (second argument) is not included. So you want 
to pass -1 here.




From fuzzyman at gmail.com  Wed May 21 17:27:37 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Wed, 21 May 2008 14:27:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
Message-ID: <be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>

On May 14, 10:30?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > Dave Parker schrieb:
> > > All of the calculators and textbooks that elementary school students
> > > use, use "^" for powers.
>
> I've never seen this symbol in textbooks. In textbooks, powers are
> written using superscript.
>
> >> ?Just like Flaming Thunder does. ?I haven't
> > > seen "**" for powers since FORTRAN.
>
> I haven't seen any language using '^' as the power operator so far -
> but I've seen quite a lot of them using it as the bitwise XOR operator.


Excel uses the caret as the power operator. Arguably the worlds most
widely used programming environment...

Michael Foord
http://www.ironpythoninaction.com/


From kw at codebykevin.com  Sat May 10 11:31:37 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:31:37 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.896.1210396853.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <4825BFD9.7020600@codebykevin.com>

Kenneth McDonald wrote:
> Any guesses as to how many people are still using Tkinter? And can 
> anyone direct me to good, current docs for Tkinter?
> 
> Thanks,
> Ken

I develop Tk applications commercially on Mac OS X, using Tcl and 
Python. Here's a screenshot of my Python app:

http://www.codebykevin.com/phynchronicity-running.png

This app is built on Python 2.5.1 and Tk 8.5.0. Tk 8.5 has a huge number 
of improvements over older versions of Tk:

http://www.tkdocs.com/resources/backgrounder.html

Most importantly, Tk 8.5 has a themed widget set that allows for 
platform-native appearance on Windows and Mac (not emulated, but hooking 
into system API's). The themed widget set also adds a lot of new 
widgets, such as combobox, tree, and others. The older widget set is 
still available as well and they can be freely matched. Tk also has a 
lot of lightweight, script-level widget libraries that can also enhance 
the appearance and usability of your app.

My own app uses widgets from Tk's traditional set, the new Tile/ttk set, 
the Tabelist widget, and the BWidget widget library. It uses the 
following Python wrappers for these widgets:

http://tkinter.unpy.net/wiki/TileWrapper
http://tkinter.unpy.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/bwidget/

It also uses a few private wrappers/custom widgets.

In addition to the Python-specifc resources that others have provided, 
here's a new site that documents the latest-and-greatest Tk techniques, 
including Tile/ttk:

http://www.tkdocs.com/

The developer of this site is mainly interest in Tcl and Ruby, so 
examples of those are provided--I may provide some Python examples at 
some point. But there should be enough code snippets there for you to 
get started, especially if you already have some experience with 
Tk/Tkinter.

Tk still has some limitations, including a lack of cross-platform 
printing support (the canvas widget generates postscript, but that's not 
enough anymore) and an incomplete cross-platform drag-and-drop mechanism 
(works fine on Windows, it's buggy on *NIx because Xdnd is so 
inconsistent, and it was never developed for OS X). If you absolutely 
need these features, look at wxPython or PyQt. But coming to Python from 
a Tcl background, I'm very comfortable with Tk--it is lightweight, 
extremely flexible, and (as I hope you can see from my screenshot) it's 
possible to do sophisticated user interfaces with it. It fits my brain 
much better than wxPython, for instance. And the long effort by Tk's 
developers to modernize its appearance has finally paid off, I think.

Hope that helps,
Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From ian.g.kelly at gmail.com  Fri May  9 00:28:51 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Thu, 8 May 2008 22:28:51 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <1210306536.4823cfe8be627@comuh.uh.cu>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
	<1210306536.4823cfe8be627@comuh.uh.cu>
Message-ID: <3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>

On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
>  Weird, I can't find neither... (which wikipedia article? Couldn't find one about
>  C99.)

Try http://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power


From dave.g1234 at gmail.com  Fri May 16 14:45:57 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 11:45:57 -0700 (PDT)
Subject: namespaces and eval
Message-ID: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>

Sorry for the repost, didnt' quite finish

Suppose I have a function in module X that calls eval e.g,

X.py
_______
Def foo(bar):
        Eval(bar)
_______

Now eval will be called using the default eval(bar,globals(),locals())
and globals will pull in anything in module X.

Now I have module Y that calls bar like so
Y.py
________
from x import *
def biz():
        print "Im a silly example!"
Foo("biz()")
_______

Python will complain that it cannot find biz because it's not the X
module.

My question - is there any way to a) get a listing of active namespaes
search ALL active namespaces for a particular variable b) get the
namespace of the caller withing passing it in (here, Y) c) do anything
else to get biz without passing foo("biz()",locals(),globals()) or
hacking biz into the __builtin__ namespace(don't know if it's even
possible, but it defeats the purpose of what I'm trying to do) ?  I
realize this is here for a reason, but I'm working on something that's
kind of a hack already

Thanks
dave


More gratuitous context. Long story I'm trying to write a hack for a
concise way of adding arbitrary methods to objects for JPA/JQuery like
chaning eg.

def foo(self):
    print "foo"
    return self;

wrap(x).foo().foo().foo().foo() etc....

instead of x.foo = foo, which alters the object.

class wrap:
    def __init__(self, obj, globalz=globals(),localz= locals()):
        self.obj = obj
        self.localz = localz;
        self.globalz = globalz;

    def __callback__(self, *args, **kw):
        newargs = [self.obj];
        newargs.extend(args);
        print locals
        ret = eval(self.name, self.globalz, self.localz)
(*newargs,**kw);
        return wrap(ret);

    def __getattr__(self,name):
        if hasattr(self.obj,name):
            return getattr(self.obj,name);
        self.name = name;
        return self.__callback__;








From danb_83 at yahoo.com  Thu May  8 22:33:00 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 19:33:00 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.817.1210288386.12834.python-list@python.org>
Message-ID: <6a0e537e-2487-4bed-b84c-3b84ae46aaa4@b5g2000pri.googlegroups.com>

On May 8, 6:14?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> On Thursday 08 May 2008 06:54:42 pm wxPytho... at gmail.com wrote:
>
> > The problem is that Python parses -123**0 as -(123**0), not as
> > (-123)**0.
>
> Actually, I've always written it as (-123)**0. At least where I'm from,
> exponentiation takes precedence even over unary "-". (to get a power of -123,
> you must write $(-123)^0$ [latex])

FWIW, my TI-89 evaluates it as -1.

> Though not an authoritative source, wikipedia also uses the (-x)^y notation:http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one
>
> Btw, there seems to be a math problem in python with exponentiation...
>
> >>> 0**0
>
> 1
>
> That 0^0 should be a nan or exception, I guess, but not 1.
>
> [just found out while trying the poster's example]

Technically correct, but 0**0 == 1 is actually pretty useful.  For one
thing, it lets you create a Vandermonde matrix without making 0 a
special case.


From aisaac at american.edu  Thu May  8 15:40:25 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 19:40:25 GMT
Subject: observer pattern question #1 (reference to subject)
In-Reply-To: <iqxoalg6.fsf@gmail.com>
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
Message-ID: <JGIUj.52528$Bb3.41853@trnddc01>

> Alan Isaac <aisaac at american.edu> writes:

>> Is anything lost by not maintaining this reference (other 

>> than error checking ...)?  If I feel the observer needs 

>> access to the subject, what is wrong with just having the 

>> subject pass itself as part of the notification? 





Ville M. Vainio wrote:

> It reduces the number of places the observer can be called 

> from, because now the event source is part of the function 

> signature. If you omit the event source in the signature, 

> you gain looser coupling - it's the observer business to 

> create the dependency. 



As I said, I'm not a programmer, and perhaps as a result, 

I have questions about both of your points.  I'll stick with 

the stock example, since it is concrete.



Note that the observor/listener in the example at

<URL:http://en.wikipedia.org/wiki/Observer_pattern>

does not create a reference to the subject.

So in this context I take you to be saying something like 

the following: "OK, here's the pattern, now your listener 

wants to know the event source, do not ask something new the 

subject to respond to that need.  That is unnecessary 

coupling.  Instead, just rewrite your listener to maintain 

a reference to the subject."



Do I have that right?



It seems to me that this response begs the question.

That is, an appropriate reply seems to be: here is a related 

pattern, call it observer2.  In the observer2 pattern, the 

subject has a getState method and always passes itself when

it notifies the observer. Now: in what sense does this 

require closer coupling?





> Also, consider the situation where you want all investors 

> to refresh their idea about stock prices (because of, 

> short network failure). It's easy to run through a list of 

> them and call update() for everybody, while it's not so 

> easy to find out what stock the investor is observing 

> (that's the investors business!) and pass that object to 

> the investor in the call. 



I seem to be missing your point here.

Let's keep using the stock/investor example.

When the network comes up, each stock should notifies 

everyone in its list of listeners.  It either passes itself

or does not.  In either case, the investor took care of hir 

side of the business by registering as a listener.

If the stock does not notify all its registered investors, 

it is breaking its contract.  So, what is the problem?



Or to put it a different way, your suggestion that the 

investors should have to *pull* this information from the 

stocks seems out of step with the observer pattern, where 

the stocks should be pushing this information to the 

investor.



Again, talk of stocks and investors is just a convenient 

short hand for discussing the observer pattern.  I do not 

care about stocks/investors more than other applications.



> Are these school questions btw?



No, sorry.  But I still appreciate the feedback.



Cheers,

Alan Isaac




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 10:10:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 16:10:32 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <4832dbd0$0$23017$426a74cc@news.free.fr>

John Salerno a ?crit :
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. 

(snip)
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)

As far as I'm concerned (and I'm a big fan of list-comps, generator 
expressions etc), this is definitively an abuse. And a waste of 
resources since it builds  a useless list of 'None'.


From m.shanmugarajan at gmail.com  Thu May 22 03:11:18 2008
From: m.shanmugarajan at gmail.com (Shanmuga Rajan)
Date: Thu, 22 May 2008 12:41:18 +0530
Subject: Need help on Soappy
Message-ID: <269329b40805220011v1982f61j3c9a2e4e15f1dd37@mail.gmail.com>

I am developing a application using webservices. I am using Soappy.
When  i tried to start reading some wsdl files from web service server then
i got the following error. Can any one please help me with this.


>>>
>>>
>>> from SOAPpy import WSDL
>>> wsdlFile = 'http://192.168.1.81/sdk/vim.wsdl'
>>> server = WSDL.Proxy(wsdlFile)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/site-packages/SOAPpy/WSDL.py", line 73, in
__init__
    service = self.wsdl.services[0]
  File "/usr/lib/python2.4/site-packages/SOAPpy/wstools/Utility.py", line
1138, in __getitem__
    return self.list[key]
IndexError: list index out of range
>>>


Advance Thanks for any help.
-- 

Cheers!
Shan
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From mail at timgolden.me.uk  Tue May 20 15:45:15 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 20 May 2008 20:45:15 +0100
Subject: List of disk drives on Windows?
In-Reply-To: <2008052013180816807-bob@passcalnmtedu>
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <48332A4B.6050605@timgolden.me.uk>

Bob Greschke wrote:
> This MUST have been asked before, but I can't seem to Google the right 
> thing.  How can I get a list of drives on a Windows box, like ["C:\", 
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?

A couple of options to get the ball rolling:

1) win32api.GetLogicalDriveStrings()

2) http://timgolden.me.uk/python/wmi_cookbook.html#find-drive-types


TJG


From efurman at admailinc.com  Mon May  5 14:56:26 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Mon, 05 May 2008 10:56:26 -0800
Subject: cgitb performance issue
Message-ID: <481F585A.5080707@admailinc.com>

Greetings!

I tried adding a form to our website for uploading large files.  
Personally, I dislike the forms that tell you you did something wrong 
and make you re-enter *all* your data again, so this one cycles and 
remembers your answers, and only prompts for the file once the rest of 
the entered data is good.  However, the first time the form loads it can 
take up to 30 seconds... any ideas why?

My server is using Apache 2.0.53 and Python 2.4.1 on a FreeBSD 5.4 system.

Thanks!
-- 
Ethan
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From nick at craig-wood.com  Tue May 20 11:30:04 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 10:30:04 -0500
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <slrng35rce.8v2.nick@irishsea.home.craig-wood.com>

Monica Leko <monica.leko at gmail.com> wrote:
>  On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> > You want your file considered as a sequence of bits rather
> > than a sequence of 8-bit bytes, do you?
> 
>  Yes.
> 
> > is the 10-bit bit-pattern to be stored at an arbitrary
> > bit-position in the file
> 
>  Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
>  sequence of bytes, than 10 bits again, etc.

You could try

  http://construct.wikispaces.com/

which could well do exactly what you want.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From bearophileHUGS at lycos.com  Tue May 20 09:46:11 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:46:11 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>

John Salerno:
> What does everyone think about this?

The Example 2 builds a list, that is then thrown away. It's just a
waste of memory (and time).

Bye,
bearophile


From gagsl-py2 at yahoo.com.ar  Sat May 24 22:50:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 23:50:40 -0300
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<200805230739.29745.maric@aristote.info>
	<g175nc$4ao$1@ger.gmane.org>
Message-ID: <op.uboviqtbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 16:25:19 -0300, Thomas Karolski <Thomas.Karolski at googlemail.com> escribi?:

> Turns out the first msg I sent did not reach the list, so I'll just post
> what I've achieved by now:

[snip a couple of long metaclasses]

> Now the reason why I'm using decorators, is because I want to be ably to
> add the functionality dynamicly - without the need of construction
> classes for the different possibilities. Composite pattern does not help
> in this case, since I lose the ability to choose in what order I call
> the decorator's and the decorated's methods.

I haven't looked in detail to your code, but if that is what you want, you don't need a Decorator metaclass at all. Just add/replace the desired methods inside the class itself (Python is a dynamic language, remember).

py> class A(object):
...   def foo(self): print "In foo, self=", self
...
py> def bar(self): print "In bar, self=", self
...
py> a = A()
py> a.foo()
In foo, self= <__main__.A object at 0x00A3CD50>
py>
py> A.bar = bar
py> a.bar
<bound method A.bar of <__main__.A object at 0x00A3CD50>>
py> a.bar()
In bar, self= <__main__.A object at 0x00A3CD50>

You can even add methods to individual instances:

py> def baz(self): print "In baz, self=", self
...
py> import new
py> b = A()
py> b.baz = new.instancemethod(baz, b, type(b))
py> a.baz()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: 'A' object has no attribute 'baz'
py> b.baz
<bound method A.baz of <__main__.A object at 0x00A3CDD0>>
py> b.baz()
In baz, self= <__main__.A object at 0x00A3CDD0>

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Wed May 28 10:49:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 14:49:26 +0000 (UTC)
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru> <5dtp34thl4a0ipeb5lm550uslud0jhpvua@4ax.com>
Message-ID: <g1jrdm$a12$1@news.mtu.ru>

On Wed, 28 May 2008 06:04:54 +0000, Tim Roberts wrote:

> Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>>On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>> 
>>>>> As I've said before - good programmers can write good code in any
>>>>> language.
>>> 
>>>> Yes, they can. But it may be harder to do for them in one language
>>>> and easier in another.
>>...
>>No. Language does matter.
> 
> A good programmer keeps many tools in his toolbox, and understands which
> tools provide the best service for the problem at hand.

Agree, I keep Python, C and x86 assembly in my toolbox. And this toolbox 
is perfect.

Actually, even PHP has its place in my toolbox, but, *only when I can't 
use Python*, eg Sourceforge.net servers don't have good Python support 
and PHP starts to make sense.

Language matters.

Ivan


From kw at codebykevin.com  Tue May 13 13:59:35 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Tue, 13 May 2008 13:59:35 -0400
Subject: where to get McMillan Installer?
In-Reply-To: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
Message-ID: <a298d$4829d22b$4275d90a$12993@FUSE.NET>

gsal wrote:
> There does not seem to be a valid url for the Installer, anywhere.
> Could anyone provide me with a copy of it?
> 
> many thanks.

http://pyinstaller.python-hosting.com/

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From vivainio at gmail.com  Tue May 13 02:17:19 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Tue, 13 May 2008 06:17:19 GMT
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
	<mailman.1004.1210630577.12834.python-list@python.org>
Message-ID: <87k5hy20eo.fsf@gmail.com>

Ricardo Ar?oz <ricaraoz at gmail.com> writes:

> The easy/simple (too easy/simple?) way I see out of it is to read THE
> WHOLE file into memory and don't worry. But what if the file is too

The easiest and simplest approach is often the best with
Python. Reading in the whole file is rarely too heavy, and you omit
the python "object overhead" entirely - all the code executes in the
fast C extensions.

If the file is too big, you might want to look up mmap:

http://effbot.org/librarybook/mmap.htm


From gandalf at shopzeus.com  Thu May 15 07:45:19 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 13:45:19 +0200
Subject: create window on panel
In-Reply-To: <93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>	<mailman.1153.1210845280.12834.python-list@python.org>
	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
Message-ID: <482C224F.3050509@shopzeus.com>


> Thanks for your reply!
>
> I am using Linux+gnome. Actually, what I want is simply a text-region
> on the panel
> and display some dynamic information on it. Is it hard to do it ?
>   
Google is your friend! I searched for "gnome python panel" and the first 
hit was:


http://www.onlamp.com/pub/a/python/2000/07/25/gnome_applet.html

:-)

Of course it is out of date but you can see that there is something 
called "/PyGNOME".
/
The package names on my Linux:

python-gnome2 python-gnome2-desktop python-gnome2-extras python-gnomecanvas

Description:

Python bindings for the GNOME desktop environment
This archive contains modules that allow you to write GNOME programs
in Python. This package contains the bindings for the new version 2.0
of that desktop environment.

URL: http://www.daa.com.au/~james/software/pygtk/
/
/It should be easy to read the docs, view the demo programs and create 
your own program.

L



From mensanator at aol.com  Sat May 17 20:50:56 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 17 May 2008 17:50:56 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com> 
	<82e6d704-95a8-4795-93a3-0650a0eaca27@d45g2000hsc.googlegroups.com>
Message-ID: <bb0b9560-5d37-4706-b3b9-82137da3bd85@27g2000hsf.googlegroups.com>

On May 17, 4:02?am, Sanoski <Joshuajr... at gmail.com> wrote:
> The reason I ask about text files is the need to save the data
> locally, and have it stored in a way where backups can easily
> be made.

Sure, you can always do that if you want. But if your target
is SQLlite or MS-Access, those are files also, so can be
backed up as easily as text files.

>
> Then if your computer crashes and you lose everything, but
> you have the data files it uses backed up, you can just
> download the program, extract the backed up data to a
> specific directory, and then it works exactly the way it
> did before you lost it. I suppose a SQLite database might
> solve this, but I'm not sure.

It will. Remember, once in a database, you have value-added
features like filtering, sorting, etc. that you would have
to do yourself if you simply read in text files.

> I'm just getting started, and I
> don't know too much about it yet.

Trust me, a database is the way to go.
My preference is MS-Access, because I need it for work.
It is a great tool for learning databases because it's
visual inteface can make you productive BEFORE you learn
SQL.

>
> I'm also still not sure how to download and associate the pictures
> that each entry has for it.

See example at end of post.

> The main thing for me now is getting
> started. It needs to get information from the web. In this case,
> it's a simple XML feed.

BeautifulSoup also has an XML parser. Got to their
web page and read the documentation.

> The one thing that seems that would
> make it easier is every post to the feed is very consistent.
> Each header starts with the letter A, which stands for Alpike
> Tech, follow by the name of the class, the room number, the
> leading student, and his GPA. All that is one line of text.
> But it's also a link to more information. For example:
>
> A Economics, 312, John Carbroil, 4.0
> That's one whole post to the feed. Like I say, it's very
> simple and consistent. Which should make this easier.

That's what you want for parsing, how to seperate
a composite set of data. Simple can sometimes be
done with split(), complex with regular expressions.

>
> Eventually I want it to follow that link and grab information
> from there too, but I'll worry about that later. Technically,
> if I figure this first part out, that problem should take
> care of itself.
>


A sample picture scraper:

from BeautifulSoup import BeautifulSoup
import urllib2
import urllib

#
# start by scraping the web page
#
the_url="http://members.aol.com/mensanator/OHIO/TheCobs.htm"
req = urllib2.Request(url=the_url)
f = urllib2.urlopen(req)
www = f.read()
soup = BeautifulSoup(www)
print soup.prettify()

#
# a simple page with pictures
#
##<html>
## <head>
##  <title>
##   Ohio - The Cobs!
##  </title>
## </head>
## <body>
##  <h1>
##   Ohio Vacation Pictures - The Cobs!
##  </h1>
##  <hr />
##  <img src="AUT_2784.JPG" />
##  <br />
##  WTF?
##  <p>
##   <img src="AUT_2764.JPG" />
##   <br />
##   This is surreal.
##  </p>
##  <p>
##   <img src="AUT_2765.JPG" />
##   <br />
##   Six foot tall corn cobs made of concrete.
##  </p>
##  <p>
##   <img src="AUT_2766.JPG" />
##   <br />
##   109 of them, laid out like a modern Stonehenge.
##  </p>
##  <p>
##   <img src="AUT_2769.JPG" />
##   <br />
##   With it's own Druid worshippers.
##  </p>
##  <p>
##   <img src="AUT_2781.JPG" />
##   <br />
##   Cue the
##   <i>
##    Also Sprach Zarathustra
##   </i>
##   soundtrack.
##  </p>
##  <p>
##   <img src="100_0887.JPG" />
##   <br />
##   Air & Space Museums are a dime a dozen.
##   <br />
##   But there's only
##   <b>
##    one
##   </b>
##   Cobs!
##  </p>
##  <p>
##  </p>
## </body>
##</html>

#
# parse the page to find all the pictures (image tags)
#
the_pics = soup.findAll('img')

for i in the_pics:
  print i

##<img src="AUT_2784.JPG" />
##<img src="AUT_2764.JPG" />
##<img src="AUT_2765.JPG" />
##<img src="AUT_2766.JPG" />
##<img src="AUT_2769.JPG" />
##<img src="AUT_2781.JPG" />
##<img src="100_0887.JPG" />

#
# the picutres have no path, so must be in the
# same directory as the web page
#
the_jpg_path="http://members.aol.com/mensanator/OHIO/"

#
# now with urllib, copy the picture files to the local
# hard drive renaming with sequence id at the same time
#
for i,j in enumerate(the_pics):
  p = the_jpg_path + j['src']
  q = 'C:\\scrape\\' + 'pic' + str(i).zfill(4) + '.jpg'
  urllib.urlretrieve(p,q)

#
# and here's the captured files
#
##  C:\>dir scrape
##   Volume in drive C has no label.
##   Volume Serial Number is D019-C60D
##
##   Directory of C:\scrape
##
##  05/17/2008  07:06 PM    <DIR>          .
##  05/17/2008  07:06 PM    <DIR>          ..
##  05/17/2008  07:05 PM            69,877 pic0000.jpg
##  05/17/2008  07:05 PM            71,776 pic0001.jpg
##  05/17/2008  07:05 PM            70,958 pic0002.jpg
##  05/17/2008  07:05 PM            69,261 pic0003.jpg
##  05/17/2008  07:05 PM            70,653 pic0004.jpg
##  05/17/2008  07:05 PM            70,564 pic0005.jpg
##  05/17/2008  07:05 PM           113,356 pic0006.jpg
##                 7 File(s)        536,445 bytes
##                 2 Dir(s)  27,823,570,944 bytes free


From wgumgfy at gmail.com  Sat May 10 03:56:33 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Sat, 10 May 2008 00:56:33 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
Message-ID: <68l2piF2sv620U1@mid.individual.net>

George Neuner wrote:
> On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
> wrote:



> > Not everyone follows language-neutral groups (such as
> > comp,programming as you pointed out), so you actually reach more
> > people by cross posting. This is what I don't understand - everyone
> > seems to assume that by cross posting, one intends on start a
> > "flamefest", when in fact most such "flamefests" are started by
> > those who cannot bring themselves to skipping over the topic that
> > they so dislike.
>
> The problem is that many initial posts have topics that are misleading
> or simplistic.  Often an interesting discussion can start on some
> point the initial poster never considered or meant to raise.

Is this not a possibility for any topic, whether it's cross-posted or 
not?


-- 
wg 




From stevegill7 at gmail.com  Fri May  2 09:47:11 2008
From: stevegill7 at gmail.com (Jetus)
Date: Fri, 2 May 2008 06:47:11 -0700 (PDT)
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
Message-ID: <ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>

On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
> > I have a comma delimited file that is separated by comma's, and then
> > sometimes by ","
>
> > c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
> > 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
> > c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
> > 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
> > c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
> > 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>
> The items are always delimited by commas but some items themselves contain
> a comma and therefore are enclosed in double quotes.  So it's not
> inconsistent.
>
> > How do I convert that line into a list?
>
> Use the `csv` module in the standard library.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Hello Marc;
Thanks for the input! I am worried about the comma in the "" data
items, how do I tell Python to look for the "" data first, then use
the comma separator?


From shahmed at sfwmd.gov  Tue May 20 12:02:20 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Tue, 20 May 2008 12:02:20 -0400
Subject: Removing Space and "-" from a string
In-Reply-To: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20B0F1772@EXCHVS01.ad.sfwmd.gov>

I have thousands of records in MS Access database table, which records I
am fetching using python script. One of the columns having string like 
'8 58-2155-58'

Desired output: '858215558'

I want to remove any spaces between string and any dashes between
strings. I could do it in access manually but want to do from python
script 

Any help is highly appreciated.

sh


From exarkun at divmod.com  Wed May 14 17:09:45 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 17:09:45 -0400
Subject: sys.excepthack...
In-Reply-To: <dullrich-866845.15471814052008@text.giganews.com>
Message-ID: <20080514210945.6859.1840458315.divmod.quotient.63533@ohm>

On Wed, 14 May 2008 15:47:18 -0500, "David C. Ullrich" <dullrich at sprynet.com> wrote:
> [snip]
>
>Came up with a ridiculous hack involving both sys.stderr
>and sys.excepthook. Works exactly the way I want.
>Seems ridiculous - what's the right way to do this?
>
> [snip]

Hi David,

Take a look at the traceback module.  The excepthook gets called with
an exception type, instance, and traceback object.  The traceback module
is good at turning these things into strings.

Jean-Paul


From s0suk3 at gmail.com  Tue May  6 02:30:38 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Mon, 5 May 2008 23:30:38 -0700 (PDT)
Subject: How can we write a class factory that dynamically redefines the 
	__init__ function etc.
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com> 
	<mailman.628.1210050918.12834.python-list@python.org>
Message-ID: <4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>

On May 6, 12:14 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> (the convention is to use lowercase names for attributes: rawdata instead
> of RawData)
>

But at least put an underscore between the words (raw_data), or, if
you like the OO world, make the subsequent words capitalized
(rawData).


From arnodel at googlemail.com  Mon May 12 04:30:59 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:30:59 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
	<gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi>
Message-ID: <65d792a8-4469-404c-8287-1357170eea05@x35g2000hsb.googlegroups.com>

On May 11, 4:36?am, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-11, John Machin <sjmac... at lexicon.net> wrote:
>
>
>
> >> "Write a program that prints the numbers from 1 to 100. But for
> >> multiples of three print "Fizz" instead of the number and for the
> >> multiples of five print "Buzz". For numbers which are multiples of
> >> both three and five print "FizzBuzz".
>
> >> for i in range(1,101):
> >> ? ? if i%3 == 0 and i%5 != 0:
> >> ? ? ? ? print "Fizz"
> >> ? ? elif i%5 == 0 and i%3 != 0:
> >> ? ? ? ? print "Buzz"
> >> ? ? elif i%5 == 0 and i%3 == 0:
> >> ? ? ? ? print "FizzBuzz"
> >> ? ? else:
> >> ? ? ? ? print i
>
> >> is there a better way than my solution? is mine ok?
>
> > Try doing it using %3 and %5 only once each.
>
> for i in xrange(101):
> ? ? print (("","Fizz")[i%3==0] + ("","Buzz")[i%5==0]) or str(i)
>
> His is better though, since it's more obvious what's intended.
>
> Here's one that's less opaque
>
> for i in xrange(101):
> ? ? s = ""
> ? ? if i%3 == 0: s += "Fizz"
> ? ? if i%5 == 0: s += "Buzz"
> ? ? if s:
> ? ? ? ? print s
> ? ? else:
> ? ? ? ? print i
>

Let's not forget to generalise the problem and code it OOP-style :)

class FizzBuzzer(object):
    def __init__(self, *fizzles):
        self.fizzles = fizzles
    def translate(self, n):
        return ''.join(val for (p, val) in self.fizzles if not n%p) or
n
    def range(self, start, stop=None, step=None):
        if stop is None:
            start, stop = 0, start
        if step is None:
            step = 1
        for n in xrange(start, stop, step):
            yield self.translate(n)
    def __getitem__(self, obj):
        if isinstance(obj, slice):
            return self.range(obj.start, obj.stop, obj.step)
        else:
            return self.translate(obj)

# FizzBuzzer in action:

>>> fizzbuzz = FizzBuzzer((3, 'Fizz'), (5, 'Buzz'))
>>> for val in fizzbuzz[1:21]:
...     print val
...
1 21 1
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
16
17
Fizz
19
Buzz
>>> abc = FizzBuzzer((2, 'Ah'), (3, 'Bee'), (5, 'Cee'))
>>> list(abc[25:35])
25 35 1
['Cee', 'Ah', 'Bee', 'Ah', 29, 'AhBeeCee', 31, 'Ah', 'Bee', 'Ah']
>>>

--
Arnaud



From fc14301589 at icqmail.com  Sun May 25 12:19:59 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Mon, 26 May 2008 00:19:59 +0800
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net> <4837ba88_1@news.tm.net.my>
	<ju9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <483991af_2@news.tm.net.my>

On 19:14, sabato 24 maggio 2008 Johannes Bauer wrote:

> Well, I do not really see your point
You wrote C statements and I felt that you were trying to apply to python
interpreter.
I think that a minimun of knoweledge on python grammar it's the base for
doing some programming.
If your examples were there only to explain your meaning, then I'm wrong
here.



From noah at noah.org  Tue May  6 20:14:30 2008
From: noah at noah.org (Noah)
Date: Tue, 6 May 2008 17:14:30 -0700 (PDT)
Subject: How do you debug memory usage?
References: <mailman.652.1210080485.12834.python-list@python.org> 
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com> 
	<mailman.678.1210108782.12834.python-list@python.org>
Message-ID: <d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>

On May 6, 2:19 pm, David <wizza... at gmail.com> wrote:
> I want to debug rdiff-backup (Python backup tool for Linux) - it's
> using 2 GB of memory (1GB ram, 1GB swap) on a backup server at work.
> ...
> David

Rsync uses a lot of memory:
   http://www.samba.org/rsync/FAQ.html#4
rdiff-backup uses librsync, not rsync.
I'm not sure if rsync uses librsync, but one could speculate that
they share some code and perhaps some of the same problems.
But 2GB seems excessive unless you are dealing with millions of files.
A memory leak seems more likely.
--
Noah


From wuwei23 at gmail.com  Tue May 27 22:19:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 19:19:19 -0700 (PDT)
Subject: confused by HTMLParser class
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <a599e3b1-f040-4dd2-b27f-040e815081bb@w8g2000prd.googlegroups.com>

On May 28, 11:20 am, globalrev <skanem... at yahoo.se> wrote:
> tried all kinds of combos to get this to work.

Did you try searching this group? There were recent posts discussing
basic usage of HTMLParser.

Throwing random code together is the least likely way to actually get
it to work.

> x = MyHTMLParser(HTMLParser())
> site = urllib.urlopen("http://docs.python.org/lib/module-
> HTMLParser.html")
> for row in site:
>     print x.handle_starttag()

Why are you passing HTMLParser in to initialise MyHTMLParser?

Why are you iterating over site and expecting your instance of
MyHTMLParser to magically know about it?

Why haven't you read the urllib.urlopen docs, to see you need to do
a .read() to actually get the page data?

Why are you so resistant to reading some basic tutorials?


From lew at lewscanon.com  Sat May 10 08:26:55 2008
From: lew at lewscanon.com (Lew)
Date: Sat, 10 May 2008 08:26:55 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <68l2piF2sv620U1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
Message-ID: <IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>

Waylen Gumbal wrote:
> George Neuner wrote:
>> On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
>> wrote:
> 
> 
> 
>>> Not everyone follows language-neutral groups (such as
>>> comp,programming as you pointed out), so you actually reach more
>>> people by cross posting. This is what I don't understand - everyone
>>> seems to assume that by cross posting, one intends on start a
>>> "flamefest", when in fact most such "flamefests" are started by
>>> those who cannot bring themselves to skipping over the topic that
>>> they so dislike.
>> The problem is that many initial posts have topics that are misleading
>> or simplistic.  Often an interesting discussion can start on some
>> point the initial poster never considered or meant to raise.
> 
> Is this not a possibility for any topic, whether it's cross-posted or 
> not?

You guys are off topic.  None of the million groups to which this message was 
posted are about netiquette.

-- 
Lew


From sebastian.noack at googlemail.com  Mon May 26 16:44:28 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Mon, 26 May 2008 13:44:28 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
Message-ID: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>

Hi,

is there a way to or at least a reason why I can not use tarfile to
create a gzip or bunzip2 compressed archive in the memory?

You might might wanna answer "use StringIO" but this isn't such easy
as it seems to be. ;) I am using Python 2.5.2, by the way. I think
this is a bug in at least in this version of python, but maybe
StringIO isn't just file-like enough for this "korky" tarfile module.
But this would conflict with its documentation.

"For special purposes, there is a second format for mode: 'filemode|
[compression]'. open() will return a TarFile object that processes its
data as a stream of blocks. No random seeking will be done on the
file. If given, fileobj may be any object that has a read() or write()
method (depending on the mode)."

Sounds good, but doesn't work. ;P StringIO provides a read() and
write() method amongst others. But tarfile has especially in this mode
problems with the StringIO object.

I extracted the code out of my project into a standalone python script
to proof this issue on the lowest level. You can run the script below
as following: ./StringIO-tarfile.py file1 [file2] [...]


#
# File: StringIO-tarfile.py
#
#!/usr/bin/env python

from StringIO import StringIO
import tarfile
import sys

def create_tar_file(filenames, fileobj, mode, result_cb=lambda f:
None):
	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
	for f in filenames:
		tar_file.add(f)
	result = result_cb(fileobj)
	tar_file.close()
	return result

if __name__ == '__main__':
	files = sys.argv[1:]
	modes = ['w%s%s' % (x, y)for x in (':', '|') for y in ('', 'gz',
'bz2')]

	string_io_cb = lambda f: f.getvalue()

	for mode in modes:
		ext = mode.replace('w|', '-pipe.tar.').replace('w:',
'.tar.').rstrip('.')
		# StringIO test.
		content = create_tar_file(files, StringIO(), mode, string_io_cb)
		fd = open('StringIO%s' % ext, 'w')
		fd.write(content)
		fd.close()

		# file object test.
		fd = open('file%s' % ext, 'w')
		create_tar_file(files, fd, mode)


As test input, I have used a directory with a single text file. As you
can see below, any tests using plain file objects were successful. But
when using StringIO, I can only create uncompressed tar files. Even
though I don't get any errors when creating them most of the files are
just empty or truncated.


$ for f in `ls *.tar{,.gz,.bz2}`; do echo -n $f; du -h $f | awk
'{print " ("$1"B)"}'; tar -tf $f; echo; done

file-pipe.tar (84KB)
foo/
foo/ksp-fosdem2008.txt

file-pipe.tar.bz2 (20KB)
foo/
foo/ksp-fosdem2008.txt

file-pipe.tar.gz (20KB)
foo/
foo/ksp-fosdem2008.txt

file.tar (84KB)
foo/
foo/ksp-fosdem2008.txt

file.tar.bz2 (20KB)
foo/
foo/ksp-fosdem2008.txt

file.tar.gz (20KB)
foo/
foo/ksp-fosdem2008.txt

StringIO-pipe.tar (76KB)
foo/
foo/ksp-fosdem2008.txt
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now

StringIO-pipe.tar.bz2 (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO-pipe.tar.gz (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO.tar (76KB)
foo/
foo/ksp-fosdem2008.txt

StringIO.tar.bz2 (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO.tar.gz (4.0KB)

gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error exit delayed from previous errors


Can somebody reproduce this problem? Did I misunderstood the API? What
would be the best work around, if I am right? I am thinking about
using the gzip and bz2 module directly.

Regards
Sebastian Noack


From upton at virginia.edu  Mon May 12 23:19:55 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 12 May 2008 23:19:55 -0400
Subject: how to get information of a running prog in python
In-Reply-To: <58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
Message-ID: <5504f9ac0805122019yc3845fcn63ea3d842b82fd29@mail.gmail.com>

On Mon, May 12, 2008 at 11:02 PM, Jimmy <mcknight0219 at gmail.com> wrote:
> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>
> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
>  > > Well, i know it may be a little non-python thing, however, I can think
>  > >  of no place better to post this question :)
>  >
>  > >  can anyone tell me, in python, how to obtain some information of a
>  > >  running program?
>  > >  paticularly, if i am playing some music in audacious or other media
>  > >  player, how can i get the the name and some other info of current
>  > >  playing song? It seems that audicious doesn't output on run-time
>  > >  --
>  > >  http://mail.python.org/mailman/listinfo/python-list
>  >
>
> > In most cases, you'll probably need some sort of API, either in the
>  > program itself or through some sort of plugin, that lets external
>  > programs query it.  For instance, there are some plugins to WinAmp
>  > that allow external programs (like Last.FM or Mog-O-Matic) to see what
>  > track is currently playing.  You may also be able to do something like
>  > get the window title (again, WinAmp's title bar usually includes the
>  > artist and title) and parse it out.  I don't really know that there's
>  > anything specific to Python for accessing these though, and it may
>  > vary depending on media player.
>  >
>  > Just my two cents...
>  >
>  > -dan
>
>  thanks!
>
>  In linux, I am always obfuscated by sort of APIs. Like how to get
>  title information of a running program?
>  where am I supposed to find these APIs
>

In the documentation for each application?  Somebody a little more
familiar with the specific apps you're interested in might be able to
help you more, especially in the case of open-source programs that
usually have developer communities.  Also, you can find some
information (although I don't know that it'll be enough to help you)
in files in /proc/$pid on Linux -- type 'man proc' in your shell to
see what you can get out of it and if anything looks helpful for you.


From jcd at sdf.lonestar.org  Thu May 29 11:59:07 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 29 May 2008 11:59:07 -0400
Subject: [OT] Re: FW: php vs python
In-Reply-To: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>
References: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>
Message-ID: <1212076747.13017.20.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-29 at 08:47 +1200, Phil Runciman wrote:
> The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have
> DSLs
> if language does not matter?
> 

For that matter, the English have several terms for snow as well.

snow
flurry
blizzard
powder
pack
flakes
crystals
sleet
slush

And in some contexts (http://www.abc-of-snowboarding.com/snowtypes.asp)

crud
crust
rime
graupel
hail

That's 14.  Inuits are unimaginative punks. ;)

Cheers,
Cliff



From ruoyu0088 at gmail.com  Fri May 30 21:21:43 2008
From: ruoyu0088 at gmail.com (HYRY)
Date: Fri, 30 May 2008 18:21:43 -0700 (PDT)
Subject: How to add function return value
Message-ID: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>

I need to write functions that return locals() as follows,
def func1():
    a = 1
    return locals()

def func2():
    b = 2
    return locals()

Can I write a decorator that it can automately do this conversion

def func1()
    a = 1

--->

def func1():
    a = 1
    return locals()



From bruno.desthuilliers at gmail.com  Fri May 16 17:08:28 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:08:28 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
Message-ID: <dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>

On 16 mai, 20:44, dave.g1... at gmail.com wrote:
> Suppose I have a function in module X that calls eval e.g,
>
> X.py
> _______
> Def foo(bar):
>         Eval(bar)
> _______
>
> Now eval will be called using the default eval(bar,globals(),locals())
> and globals will pull in anything in module X.
>
> Now I have module Y that calls bar like so
> Y.py
> ________
> from x import *
> def biz():
>         print "Im a silly example!"
> Foo("biz()")
> _______
>
> Python will complain that it cannot find biz because it's not the X
> module.

I'm afraid you're using the wrong tool here. Just try this:

# module x
def foo(bar):
    bar()

# module y
from x import foo
def baaz():
    print "in y.baaz"

foo(baaz)

Remember that in Python, everything (at least, everything you can bind
to a nme) is an object, including functions, classes and modules. And
that every name lives in a namespace, that can be inspected somehow
(using globals() and locals(), but also using getattr() or some
function from the inspect module). IOW, when you think that eval() (or
exec()) is what you need, odds are there's a way better solution.
FWIW, I must have used exec twice and eval thrice in 7+ years of
Python programming - and believe me, I'm not afraid of wizardry and
black magic.




From stevegill7 at gmail.com  Fri May  2 07:14:47 2008
From: stevegill7 at gmail.com (Jetus)
Date: Fri, 2 May 2008 04:14:47 -0700 (PDT)
Subject: creating a list from a inconsistent text file
Message-ID: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>

I have a comma delimited file that is separated by comma's, and then
sometimes by ","

c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "


I would like to pick out data in a particular column. So am I right in
thinking that I would need to covert each line into a list, then
choose the appropriate column via a index?

How do I convert that line into a list?


From deets at nospam.web.de  Thu May 22 09:16:55 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 15:16:55 +0200
Subject: merging the global namespaces of two modules
References: <mailman.1469.1211449697.12834.python-list@python.org>
	<cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
	<mailman.1471.1211460556.12834.python-list@python.org>
Message-ID: <69la34F33541cU1@mid.uni-berlin.de>

Fabrizio Pollastri wrote:

> Jeff wrote:
>> Can you be more specific?  modA and modB don't import from each other
>> but both need to access objects in the global namespace of what
>> module?  The controlling application?
> 
>> Or do you mean that, for
>> example, modA needs to access some functions in modB, but does not
>> have import statements to do so, and you want the controlling program
>> to do the imports for it?
> 
> Exactly this.
> 
>> If that is the case, that is bad
>> programming practice in Python.  Python is not C and you can't just
>> share header files :)
> 
> Ok. I know that I want a python import to behave like a C include, it is
> so bad?
> 
> The motivation arise from a family of applications that import, among
> others, two modules: a basic one and a specific one. The specific one is
> chosen from a set of modules at import time depending on other imported
> modules, so the basic module can known its external references against the
> specific module only at run time.
> 
> One solution can be:
> -the application imports the basic module,
> -the basic module selects the proper specific module among the allowable
> specific modules,
> -the basic module imports the selected module with an __import__ call
> equivalent to "import selected_module_X as select_module",
> -Any reference to the specific module in the basic module is written in
> the form "selected_module.object_name".
> 
> Any better solution?

http://peak.telecommunity.com/DevCenter/PkgResources#namespace-package-support

Diez


From stefan_ml at behnel.de  Wed May 28 15:54:33 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 28 May 2008 21:54:33 +0200
Subject: confused by HTMLParser class
In-Reply-To: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <483DB879.9010609@behnel.de>

globalrev wrote:
> tried all kinds of combos to get this to work.

In case you meant to say that you can't get it to work, consider using lxml
instead.

http://codespeak.net/lxml
http://codespeak.net/lxml/lxmlhtml.html

Stefan


From florian.herlings at googlemail.com  Sat May  3 07:08:53 2008
From: florian.herlings at googlemail.com (Florian Herlings)
Date: Sat, 3 May 2008 13:08:53 +0200
Subject: How to use a parameter in a class
In-Reply-To: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <c1edf59a0805030408m31c63fecqebee47f5f47e28f4@mail.gmail.com>

Hello Decebal,

I am new to python myself, which might be the cause why I do not get
that "last line" at all. To me it looks like you are trying to set a
variable in the class body (if I am reading the indent correctly) and
call a function (that does not exist?) to calculate the value for it.
Does that work at all?

About a week ago I learned something, that might solve your problem:
You can only access the instance's variables from within a function.
The variable is not visible from the outside. To get that value (12 on
your example) you have to be in a function, or call your returnValue()
function from the outside.

I hope, that I did not waste your time with my lowest level knowledge.

Have a nice weekend,
Florian


On Sat, May 3, 2008 at 12:05 PM, Decebal <CLDWesterhof at gmail.com> wrote:
> I have the following class:
>  #####
>  class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
>
>     def testing(self):
>         print 'In test: %d' % self.value
>
>     def returnValue(self):
>         return self.value
>
>     result = someFuntion(default = value)
>  #####
>
>  But the last line does not work.
>  I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
>
>  And that someFunction gets a default value of 12. How can I do that?
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From cnshoes61 at yahoo.com.cn  Mon May 12 07:21:56 2008
From: cnshoes61 at yahoo.com.cn (cnshoes61 at yahoo.com.cn)
Date: Mon, 12 May 2008 04:21:56 -0700 (PDT)
Subject: CHINA WHOLESALE GUCCI PRADA SHOES, SNEAKERS, PURSE, SUNGLASSES,
	BESTS ETC
Message-ID: <903957d1-ec95-4a1f-a3c7-98a8e8ba4eae@k10g2000prm.googlegroups.com>

Discount Coach Sandals, Dior Sandals, Prada  Sandals, Chanel Sandals,
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From aguirre.adolfo at gmail.com  Sun May  4 20:18:40 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Sun, 4 May 2008 17:18:40 -0700 (PDT)
Subject: Numpy not found
Message-ID: <9d1d26d4-6351-4557-9834-fd51669858df@34g2000hsf.googlegroups.com>



I downloaded and installed Phyton 2.52 (it works), numpy-1.0.4.win32-
py2.5, and scipy-0.6.0.win32-py2.5

I can?t get Numpy to show up at Python?s  IDLE, or command line. If I
do:

>>>> import Numeric
# I get
>>>> Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import Numeric
ImportError: No module named Numeric

And if I do:
>>>> import Numeric *
# I get
SyntaxError: invalid syntax

I restarted the machine and double clicked in the same file
numpy-1.0.4.win32-py2.5 again, it asked whether I wanted to reinstall
or repair, I chose repair. I tried the same commands again after this
but I got the same results.

Next, I went o the Python25 "site packages"  subdirectory and there I
found "setup.py" and "readme.txt" files. I did  run the setup with no
changes and the readme file suggested to run the setup.py scrip. No
changes.

Any help with this mater will be much appreciated,

Adolfo






From frikker at gmail.com  Wed May 28 19:41:49 2008
From: frikker at gmail.com (blaine)
Date: Wed, 28 May 2008 16:41:49 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
Message-ID: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>

Hey everyone,
  Just a friendly question about an efficient way to do this.  I have
a graph with nodes and edges (networkx is am amazing library, check it
out!).  I also have a lookup table with weights of each edge.  So:

weights[(edge1, edge2)] = .12
weights[(edge2, edge5)] = .53
weights[(edge5, edge1)] = 1.23
weights[(edge3, edge2)] = -2.34
etc.

I would like to take this weight table and subject it to evolutionary
mutations.  So given a probability p (mutation rate), mutate edge
weights by some random value.   So in effect, if p is .25, choose 25%
random edges, and mutate them some amount.  So:
1.  Whats a good way to get the keys? I'm using a loop with
random.choice() at the moment.
2.  Any comments on how to get a 'fair' mutation on an existing edge
value?

I currently am doing something like this, which seems like it leaves
something to be desired.

import random
weights = generateweights() # generates table like the one above
p = 0.25
v = random.betavariate(2, 10)
num = int(v*len(weights)) # How many weights should we mutate?
keys = w.keys()
for i in xrange(num):
  val = random.choice(keys) # Choose a single random key
  w[val] = w[val]*(random.random()*5-1) # Is this a 'good' way to
'mutate' the value?

This is an evolutionary search, so mutate in this sense relates to a
genetic algorithm, perhaps a gradient decent?
Thanks!
Blaine


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 10:15:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 16:15:58 +0200
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <mailman.1007.1210634653.12834.python-list@python.org>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>	<mailman.969.1210575642.12834.python-list@python.org>	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1007.1210634653.12834.python-list@python.org>
Message-ID: <4829a29d$0$11051$426a74cc@news.free.fr>

Kam-Hung Soh a ?crit :
> On Tue, 13 May 2008 03:42:30 +1000, bruno.desthuilliers at gmail.com 
> <bruno.desthuilliers at gmail.com> wrote:
> 
>> I just can't believe someone applying for a programmer position cannot
>> provide a sensible anwser in 5 or less minutes.
> 
> You should join the recruitment and interview panel in your organization 
> to test your faith.

I've done some recruitment - for a programmer position - in my previous 
shop , and none of the guys that we interwieved were *that* bad.


From cwitts at gmail.com  Thu May 29 05:02:31 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 29 May 2008 02:02:31 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <b0fc1a8b-98c0-4bbf-9afb-cf5741eae1f6@t54g2000hsg.googlegroups.com>

On May 29, 10:36?am, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

How large are the files ? You could load up the smallest file into
memory then while iterating over the other one just do 'if line in
other_files_lines:' and do your processing from there.  By your
description it doesn't sound like you want to iterate over both files
simultaneously and do a line for line comparison because that would
mean if someone plonks an extra newline somewhere it wouldn't gel.


From paul at ulkarodgers.com  Thu May 29 19:50:20 2008
From: paul at ulkarodgers.com (paul at ulkarodgers.com)
Date: Thu, 29 May 2008 16:50:20 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
Message-ID: <4c2b01e4-10b3-455d-a29e-bc5bb31a8264@59g2000hsb.googlegroups.com>

Have you shown this stuff to the google AppEngine folks!
Thats being touted as the thing that'll make web-2 easy

but you have to write code (Python) which will turn off 99% of
possible users.

What made Hypercard really great  (and Supercard on DOS, and the new
clones like Revolution) is that it was a drag-n-drop GUI designer, it
"built-in" the data storage (persistence layer is what we call it now)
it was INTEGRATED, (you only had to get the one thing, not heinz-57-
bloody-pieces) and it used an easily-readable interpreted programming
language.

App-Engine has the persistence, and the integration, its missing the
others and without them it'll never be great.

call those guys, they need you!
I need your stuff on their infrastructure. THAT would be worth a case
of champagne.


From ivan.illarionov at gmail.com  Mon May 12 02:56:47 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 06:56:47 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
Message-ID: <g08pnf$2lbi$1@news.mtu.ru>

On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote:
[...]
> That is also regrettably common in Python code. It still suffers from
> being unnecessarily ambiguous, since there are *also* plenty of loops
> using 'i', 'j', etc. where the loop counter *is* used.
> 
> Differentiating these use cases by appropriate naming is, IMO, worth the
> effort of choosing a meaningful name.

Even if the counter is not used inside the loop's body it's still in 
control of the whole loop and, IMO, any special discriminating and non-
conventional name doesn't worth the added confusion.

-- Ivan


From Lie.1296 at gmail.com  Fri May 16 15:06:22 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 16 May 2008 12:06:22 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com> 
	<3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com>
Message-ID: <6895c7ef-7886-4cf4-b558-a869a4bb9d06@z24g2000prf.googlegroups.com>

On May 9, 7:36?pm, Unknown Hero <unknown_hero... at hotmail.com> wrote:
> Ah, never mind, got it to work. Here's the code now. I hope I won't
> run into another problems later :D
>
> <code snippet>
> #Goes through all keys and subkeys in the selected hive (defined as
> root) and replaces the value 'old' with the value 'new'
> #
> #IMPORTANT! You should always back up the registry before attempting
> to modify it.
> #The author of this script CANNOT BE HELD RESPONSIVE for any damage
> caused by running this script.
(snip)

One thing though, the disclaimer should not said the author cannot be
held responsive, or you would be Windows that is not responsive all
the times. I think it should say "responsible".

I'm quite confused though, the code could be made simpler by dozens
using Python's high-level functionalities. Particularly the lengthy
code that checked whether the string contained a substring and replace
the substring with new could be done easily (and faster) using
python's in and replace function. I'll post the code later when I
finished checking places where the codes could be simplified, and I'll
also polish the entry code and a few other things (and pythonify the
code according to the PEP 8's guide lines).


From dannywebster at googlemail.com  Tue May 13 06:28:03 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 03:28:03 -0700 (PDT)
Subject: Best way to delimit a list?
Message-ID: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>

Hi - I have a list returned from popen/readlines, and am wondering how
to go about iterating over each item which was returned (rather than
currently having the whole lot returned).

so far:

>>> f=os.open("./get_hostnames").readlines

returns ['host1 host2 host3 ... hostN\n]'

i'd like to be in a position to iterate through these, grabbing each
host.  I have played with transmuting to a str, and using split, and
this works, but I get the subscript brackets from the list output as
expected, as the list output is now a string literal, and this is not
what I want - and I think it's a bit long-winded to do a search 'n
replace on it - hence why I ask in the subject what's the best way.

>>> f=str(f)
>>> f.split()
["['host1","host2", ... ,"hostN\n']"]


Any help is highly appreciated

ta

dan.


From zerge69 at gmail.com  Sun May 25 02:00:31 2008
From: zerge69 at gmail.com (Zerge)
Date: Sat, 24 May 2008 23:00:31 -0700 (PDT)
Subject: True random number generator
Message-ID: <fc07a939-0c86-4f3d-912a-1b650939c578@j1g2000prb.googlegroups.com>

truerandom.py is a Python module that generates true random numbers
obtained from www.random.org.

Use with the form: mylist=truerandom.getnum(min,max,amount)

mylist will be a list containing the true random numbers.

If for some reason the numbers cannot be generated, the list will
contain -1.

You can download it here:
http://code.google.com/p/truerandom/


From castironpi at gmail.com  Thu May  8 20:07:15 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:07:15 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
	<mailman.811.1210282241.12834.python-list@python.org>
Message-ID: <d2f81c2a-7b87-4dbe-98f1-ee1d8f7e98cc@i76g2000hsf.googlegroups.com>

On May 8, 4:30?pm, "Chuckk Hubbard" <badmuthahubb... at gmail.com> wrote:
> I likewise don't know enough to compare between toolkits, but another
> one to check out might be pygame. ?If nothing else, it is meant to be
> fast and to handle 3D views.
>
> -Chuckk
>
> On Fri, May 9, 2008 at 12:10 AM, Joe P. Cool <joe.p.c... at googlemail.com> wrote:
>
> > So far I have a little experience with Tkinter and wxPython. I wonder
> > which of the numerous Python GUI kits would be the best choice for a
> > multi platform application that makes heavy use of custom controls, 3D
> > views and the like? Thanks in advance for your hints and advice.
>
> > Joe
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com

I am not holding that programming is profitable (or even a good
experience) without a community to talk to.  If a computer is a
generic man-borne tool, true currency (time) will answer to it as a
tool.

Do note that money tracks experience.  If you're not having a good
experience, back up a step, and have fun with your hands.  Thus*, I
think sound and OS-band controls would be the funnest to start long
threads about.  Just names have to run: fly or float.

*Money floats off its gold standard.  What sounds float, and does
everyone use the Microsoft-103 Dell-brand 15" laptop?  What, not
everyone?

I have been having problems with feedback-buffers in sound files.
Here's a particularly pleasing grid in intervals, and even progressing
chromaticly.

prog= [
( 1, 5, 8 ),
( 1, 5, 10 ),
( 1, 6, 10 ),
( 3, 6, 10 ),
( 3, 6, 12 ),
( 3, 8, 12 ),
( 5, 8, 13 )
]

for i, key in enumerate( 'C2 C#2 D2 D#2 E2 F2 F#2 G2 G#2 A2 A#2 B2
C3'.split( ) ):
...
    snd.play( )

How fast can the drives act to the mouse, and what keys do you want on
your organ?

Att: cough4.wav


From wizzardx at gmail.com  Sun May  4 05:14:59 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 11:14:59 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
Message-ID: <18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>

> - Are there any peculiarities with using curs.executemany(...) vs. multiple
> curs.execute(...) ? I read a notice, sqlite3 does internally some caching,
> hence both should be similarly fast, but in my case executemany(...) is
> quite a bit faster

How many times are you calling execute vs a single executemany? The
python call overhead will add up for thousands of calls.

The relevant source code is here if you're interested:

http://svn.python.org/projects/python/trunk/Modules/_sqlite/cursor.c

>  Further, I am not quite sure about the standard usage of the cursor object
> and also the proper commiting the transactions and closing the connection.

Standard usage is here:

http://docs.python.org/lib/module-sqlite3.html

If the database supports transactions then cursors automatically use
transactions. Your changes only get committed when you call .commit().
Otherwise your changes are lost.

In the specific case of sqllite, some statements (like CREATE TABLE,
ALTER TABLE, etc) also cause a commit. This is probably where your
confusion comes from. Since this isn't part of the python DB API spec
(http://www.python.org/dev/peps/pep-0249/) I wouldn't rely on it.
Otherwise you will have problems with other databases.

Also, in your specific case you're using an 'in memory' sqllite db. So
there are less concerns with losing data between db sessions, etc. But
with most databases (on disk, running across the network on a server)
this becomes important.

>  Should one create a cursor of a connection and call the execute ... methods
> of the cursor -
>  or is it better to call the shortcut execute etc. methods of the Connection
> object directly (as suggested in the docs:
> http://docs.python.org/lib/node351.html (or are there specific use cases for
> both approaches)?

I suggest that you use the standard cursor methods instead, so you can
run your code against non-sqllite databases.  The performance etc
should be the same as using the direct method. Like the page says,
it's main benefit is consiseness.

>
> When the transactions should be commited? (creating, altering a table, or
> also selecting the results ?)
>  There seem to be some implicit handling of the transactions (
> http://docs.python.org/lib/sqlite3-Controlling-Transactions.html#sqlite3-Controlling-Transactions
> ); hence I am not sure about the standard usage of these methods; the same
> is true of connection.close() - or are these calls eventually unnecessary?

As a general rule, always use .commit() and .close(). Otherwise:

- No .commit() - you will lose db changes since the last commit or
"non-DML, non-query statement" (in the case of sqllite)
- No .close() - Your database connection will only close when your db
objects are garbage collected.

> conn_tags_DB = sqlite3.connect(':memory:')
>  curs = self.conn_tags_DB.cursor()
>  curs.execute('CREATE TABLE IF NOT EXISTS "%s" ("%s", UNIQUE("%s"))' %
> (self.text_name, index_col_name, index_col_name))
>  curs.execute(u'INSERT OR REPLACE INTO "%s"("%s") VALUES (?)' %
> (self.text_name, index_col_name), (0,))
>  for new_col in act_db_columns[1:]: # adds the needed columns (except of the
> first one: index_col_name)
>      curs.execute('ALTER TABLE "%s" ADD "%s" TEXT' % (self.text_name,
> new_col))
>  curs.executemany('INSERT OR REPLACE INTO "%s" VALUES (%s)' %
> (self.text_name, question_marks), tags_seq)
>  self.conn_tags_DB.commit()
>
> Are there maybe any comments or hints on a more elegant/efficient solution?
>

I think that dynamically creating schema (tables, based on text file
structure is a bad idea. A few reasons:

- This forces you to dynamically generate all your queries dynamically
- Not all strings are valid table/column names
- This forces the app to run as database administrator (maybe not
important for sqllite, but definitely an issue if you change to
another dbm).
- Potentially huge stability/security problems - text files can
potentially break system tables, overwrite users, etc, etc.

You're violating several rules on db design/usage.

I strongly recommend that you use a better database logic. ie, create
tables and records in advance (setup script, as db admin user if
applicable), then only use delete/insert/update/select statements (as
restricted user, if applicable).

If this is too much trouble, then I suggest storing your database in
regular Python structures instead, and use pickle/yaml/etc to write to
disk. Your current version uses a 'in memory' database, so the end
result is the same. You'll get a large performance boost also.

> Now, what's the usual way to access the database? Is it
> possible/wise/standard ... to leave the connection open for the subsequent
> queries during the whole run of the app; could even the cursor eventually be
> present as a class method, or should it rather be created repeatedly with
> each call?  (After populating, the db shouldn't be modified, but only read.)

It depends. If your app is simple, single threaded, then a single
connection (global or passed through args) should be fine. Only use
multiple cursors if you need them (multiple threads, multiple
databases, multiple transaction/db isolation levels, etc).

David.


From mediocre_person at hotmail.com  Fri May  2 14:58:29 2008
From: mediocre_person at hotmail.com (Nick J Chackowsky)
Date: Fri, 02 May 2008 13:58:29 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
Message-ID: <491f6$481b6455$547@news.teranews.com>

TkNeo wrote:
> WHAT ?
> 
> This is crazy

Crazy like a fox?

a = [1, 2, 3]
try:
     a.index(99)
except:
     a.append(99)
finally:
     print a.index(99)

MY question: which exception should I actually be catching there?
** Posted from http://www.teranews.com **


From gagsl-py2 at yahoo.com.ar  Fri May  2 15:02:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:02:15 -0300
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
Message-ID: <op.uaji512bx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:25:13 -0300, TkNeo <tarun.kap at gmail.com> escribi?:

> WHAT ?
>
> This is crazy

crashes? Or raises a ValueError exception, which is perfectly normal?

-- 
Gabriel Genellina



From jzgoda at o2.usun.pl  Sat May 24 08:18:13 2008
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 24 May 2008 14:18:13 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <esujg5x5u5.ln2@joeserver.homelan.net>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <g191f8$nn7$1@nemesis.news.neostrada.pl>

Johannes Bauer pisze:

> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
> 
> if (q = getchar()) {
>     printf("%d\n", q);
> }
> 
> or translated to Python:
> 
> if (p = myfunction()):
>     print p
> 
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

Assignment operation (or, as we prefer calling: "binding value to name")
has no boolean value, because it succeeds always. While call to
myfunction can return any value, binding it to name p has no value at all.

Tell us your objective, so we could show you "proper way" (tm). ;)

-- 
Jarek Zgoda
http://zgodowie.org/

"We read Knuth so you don't have to" - Tim Peters


From Lie.1296 at gmail.com  Wed May 14 02:04:45 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 23:04:45 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
	<mdOdnfgVSIsm9LfVnZ2dnUVZ_h3inZ2d@earthlink.com>
Message-ID: <141deef4-54dc-48fb-9f7c-d8ed1578b0e9@x19g2000prg.googlegroups.com>

On May 14, 11:25?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 13 May 2008 09:36:28 -0700 (PDT), Dave Parker
> <davepar... at flamingthunder.com> declaimed the following in
> comp.lang.python:
>
> > > ... there's something that feels very unnatural about writing English as code.
>
> > I think it is ironic that you think Flaming Thunder is unnatural
> > because it is more English-like, when being English-like was one of
> > Python's goals: "Python was designed to be a highly readable language.
> > It aims toward an uncluttered visual layout, using English keywords
> > frequently where other languages use punctuation."
> >http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and...
>
> ? ? ? ? I'd consider the emphasis to be "keywords ... punctuation", whereas
> "English" is just a qualifier...
>
> ? ? ? ? If you want to follow this to the limit, the ^ vs ** would
> disappear...
>
> ? ? ? ? let x be y raised to z

I'm doubting that anyone would rely on a natural language programming
language written by someone who has misunderstood other's post 3-4
times, and have misquoted news story several times because of his
misunderstanding. If he can't even understand English text properly,
how could he write a natural language parser?


From wxPythoner at gmail.com  Tue May 13 06:25:06 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 03:25:06 -0700 (PDT)
Subject: Backslash frowned upon?
Message-ID: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>

Why is the  \  backslash character frowned upon? Can I still use it in
Python 3.0 to achieve the same thing it was designed to do?


From fiacre.patrick at gmail.com  Fri May 23 07:20:21 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 07:20:21 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <69nls3F344g2cU1@mid.uni-berlin.de>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
	<69nls3F344g2cU1@mid.uni-berlin.de>
Message-ID: <4836a876$0$11623$607ed4bc@cv.net>

Diez B. Roggisch wrote:
> Andrew Lee schrieb:
>> Diez B. Roggisch wrote:
>>> Jimmy schrieb:
>>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>>> Jimmy wrote:
>>>>>> Hi to all
>>>>>> python now has grown to a versatile language that can
>>>>>> accomplish tasks for many different purposes. However,
>>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>>> So I am wondering if python can do some kernel coding that
>>>>>> used to be the private garden of C/C++. For example, can python
>>>>>> intercept the input of keyboard on a system level? someone told me
>>>>>> it's a kernel thing, isn't it?
>>>>> http://wiki.python.org/moin/elmer
>>>>
>>>> well, straightly speaking, how can I know a key is pressed on a system-
>>>> level if
>>>> using python?
>>>
>>> What has that todo with kernel programming? You can use e.g. pygame 
>>> to get keystrokes. Or under linux, read (if you are root) the 
>>> keyboard input file - I've done that to support several keyboards 
>>> attached to a machine.
>>>
>>> And the original question: no, python can't be used as kernel 
>>> programming language. Amongst other reasons, performance & the GIL 
>>> prevent that.
>>>
>>> Diez
>>
>> http://www.kernel-panic.it/programming/py-pf/
>>
>> Of course you can code kernel routines in Python -- you are just 
>> calling the underlying C interface.  The GIL means you have to manage 
>> threadsafety on your own -- it doesn't imply kernel programming can 
>> not be done.
> 
> I understood the OP's question as "can one program kernelspace routines 
> in python". Which I don't think is possible. And I don't see how py-pf 
> does that either.
> 
> Diez


OP: "I am wondering if python can do some kernel coding that
used to be the private garden of C/C++."

The answer is yes.  IPC and py-pf are examples.  If you don't think of 
packet filtering as kernel coding, I can understand.  But clearly the 
Python interfaces to fork(), waitpid(), signal(), alarm() and so forth 
are forays into the once private garden of C.


From notnorwegian at yahoo.se  Mon May 26 21:03:14 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 18:03:14 -0700 (PDT)
Subject: python raycaster, pycaster, where?
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
	<mailman.1627.1211837219.12834.python-list@python.org>
Message-ID: <0a414718-cf1b-40fd-8abb-8c4a3e51c743@8g2000hse.googlegroups.com>

On 26 Maj, 23:26, "Dan Upton" <up... at virginia.edu> wrote:
> On Mon, May 26, 2008 at 4:52 PM,  <notnorweg... at yahoo.se> wrote:
> > i tried googling this thing but couldnt find it. i cant find it in
> > pyagme either.
>
> Really?
>
> http://www.google.com/search?q=pycaster
>
> The first link has downloads for it.

quite funny, the first post returns this posted on another forum ...
and then the same links again.

clicking any of the links that dont lead here ar eeither outdated or
broken.


From dickinsm at gmail.com  Thu May 22 11:26:09 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 08:26:09 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
	<f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>
	<69l1teF33eaduU1@mid.uni-berlin.de>
Message-ID: <b504af34-168e-42a8-b5cd-4a03ff8571c4@m3g2000hsc.googlegroups.com>

On May 22, 6:57?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >
> I wonder how you would accomplish that, given that there is no fix.
>
> http://hal.archives-ouvertes.fr/hal-00128124
>
> Diez

For anyone still following the discussion, I highly
recommend the above mentioned paper;  I found it
extremely helpful.

http://bugs.python.org/issue2937

Mark


From venkat83 at gmail.com  Fri May 16 02:38:21 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Thu, 15 May 2008 23:38:21 -0700 (PDT)
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
Message-ID: <9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>

Or a better example would be:

I have the params in a config file and import this module:
myconfig.py
a=10
b=30
c=31
d=40

import myconfig
def checkCutoff(self,up,down):
       .............do some processing........
       if (a <= score <= b):
                result="Bad"
       elif (c <= score <= d):
                result="Good"
       .............do some processing........
       return result

Now when i 'manually' make some changes to the value of a,b,c,d then
the the checkCutoff func should refer to the new values.

-Venkat


From gnewsg at gmail.com  Wed May 21 20:10:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 21 May 2008 17:10:03 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
Message-ID: <ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>

On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
> what are the simple ways?
> I could think of os.open(), os.exec(touch file)
>
> are there any simpler methods?

Just use os.path.exists to check for file existence and open() as
replacement for touch.

>>> import os
>>> if not os.path.exists('file'):
...     open('file', 'w').close()
...
>>>


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From bronger at physik.rwth-aachen.de  Sat May  3 17:27:08 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 03 May 2008 23:27:08 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
	<8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>
Message-ID: <87fxszrscz.fsf@physik.rwth-aachen.de>

Hall?chen!

Erik Max Francis writes:

> Szabolcs Horv?t wrote:
>
>> Arnaud Delobelle wrote:
>>>
>>> sum() works for any sequence of objects with an __add__ method, not
>>> just floats!  Your algorithm is specific to floats.
>>
>> This occurred to me also, but then I tried
>>
>> sum(['abc', 'efg'], '')
>>
>> and it did not work.  Or is this just a special exception to
>> prevent the  misuse of sum to join strings?  (As I said, I'm only
>> an occasional user.)
>
> What you wrote is nonsensical there, no different from 'a' + 1 --
> which is why it quite rightly raises a TypeError.

No, the above expression should yield ''+'abc'+'efg', look for the
signature of sum in the docs.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From upton at virginia.edu  Mon May 26 22:58:30 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 22:58:30 -0400
Subject: sort list doesnt work, key=str still doesnt work
In-Reply-To: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805261958g2c773072pdb5ecc72366d47fd@mail.gmail.com>

On Mon, May 26, 2008 at 10:46 PM,  <notnorwegian at yahoo.se> wrote:
>>>> x
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>>>> x
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>>>>
>
> what do i need to do?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's correct behavior for what you gave it.  Example from
http://www.python.org/doc/2.4.3/whatsnew/node12.html :

>>> sorted('Monty Python')          # any iterable may be an input
[' ', 'M', 'P', 'h', 'n', 'n', 'o', 'o', 't', 't', 'y', 'y']

It looks like it's sorting based on ASCII value which means all upper
case letters come before any lower case letter.


From roy at panix.com  Sat May 24 09:12:23 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:12:23 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
Message-ID: <roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>

In article 
<84ff733a-e364-437d-9b5d-d8bb14cc692d at m73g2000hsh.googlegroups.com>,
 John Roth <johnroth1 at gmail.com> wrote:

> > Does the following patch has a chance of being introduced in the
> > standard python distribution?
> 
> I certainly hope not!

I think you're being overly negative here.  Antoon went to the trouble to 
read the sources and post a diff.  At the very least, he deserves a more 
polite response.

But, more than that, I think Antoon's idea has some merit.  I understand 
that the mantra in unit testing is that the tests should be able to be run 
in any order.  Still, it's the job of a library package to make it easy to 
do things, not to enforce policy.  If somebody (for whatever reason) has a 
need to run their tests in a certain order, why is it our job to make it 
hard for them to do that?

In fact, unittest.defaultTestLoader *already* sorts the tests into 
alphabetical order by their name.  So, if somebody wanted to get the tests 
run in order, they could just name their tests "test0001", "test0002", etc.  
In fact, I've done that in the past when I had some (long forgotten) reason 
why I wanted to run a bunch of things in order.  Allowing the tests to be 
sorted by line number order instead of by name just makes it a little 
easier to do the same thing.

If somebody wants that functionality, and is willing to put in the effort 
to write the code to do it, and contribute that back to the community, I 
don't see any reason why it shouldn't be considered.  It would have to be 
done in a way that doesn't change the current behavior (perhaps by shipping 
a subclass of TestLoader which users could use instead of the default).  
I'm not saying that we *need* to include it, just that it's not such a bad 
idea that it deserves responses like "I certainly hope not!"


From kyosohma at gmail.com  Fri May 23 09:25:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 06:25:01 -0700 (PDT)
Subject: Advice from senior Members
References: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>
Message-ID: <713f2757-a4f6-4685-834e-9f7502334da6@d45g2000hsc.googlegroups.com>

On May 23, 8:02?am, flit <superf... at gmail.com> wrote:
> Hello All,
>
> I am looking for some experience from the senior members.
> Now I am doing a simple desktop application, this application will
> have 3 main functions:
>
> 1- Read information about the desktop system;
> 2- Interact with the user;
> 3- Send information to a server.
>
> The first part, reading information about the desktop system, is
> already done.
> And now I am starting to make the gui for the user, that is when the
> question appear:
> "What is the best way to make it? divide in files? by classes or
> functions?"
> I have now one big file with all functions to get the desktop
> information.
> Should I make one file for the visual functions (wxpython)? another
> for the server?
> Is productive to divide in files? what is the best way?
>
> It seems like a naive question, maybe easy one, but I am willing to
> enjoy the experience from the most senior programmers here.
>
> Thanks

I would investigate the MVC (model-view-controller) architecture. That
is what wxPython advocates as does TurboGears and Django. The idea is
to keep your view (the GUI) separate from the logic (the controller)
and (I think) the model controls the data access.

Anyway, it's explained much better at these sites:

http://wiki.wxpython.org/ModelViewController
http://wiki.wxpython.org/wxPython%20Patterns
http://en.wikipedia.org/wiki/Model-view-controller

I try to keep my GUI code as decoupled from my logic code as possible.

Mike


From ryntech at gmail.com  Fri May  9 09:37:15 2008
From: ryntech at gmail.com (rynt)
Date: Fri, 9 May 2008 06:37:15 -0700 (PDT)
Subject: Web Framework suggestions for a RIA type application for managing lab
	specimens
Message-ID: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>

Hello all.

I'm Looking for suggestions for which Python web framework(e.g.
Django, Turbogears,etc.) would work best to develop a cross platform
browser based system to manage lab specimens.

Requirements are:
a. highly secure
b. run on internet or intranet
e. RDBMS read/write intensive
d. be able to work on-line or off-line (with automatic updates to db
when coming back on-line)
e. be able to print reports and labels using a variety of
printers(laser, deskjet, label printers)
f. have a rich set of desktop-like components

Perhaps a web based app isn't the way to go.  Arguments for and
against gratefully accepted.

Pros and Cons for any frameworks gratefully accepted.

Perhaps a framework isn't really what's needed here, but a combination
of different web components and technologies?

Anyway, I'm grateful for any ideas you may be able to give me.

Thanks
Ruben



From duncan.booth at invalid.invalid  Thu May 22 03:53:06 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 07:53:06 GMT
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
	<a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>
Message-ID: <Xns9AA6596091F47duncanbooth@127.0.0.1>

bukzor <workitharder at gmail.com> wrote:

> On May 21, 4:33 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>> Andr? <andre.robe... at gmail.com> wrote
>> innews:a9913f2d-0c1a-4492-bf58-5c7 
> 8813c4458 at s50g2000hsb.googlegroups.com:
>>
>> > How about something like the following (untested)
>>
>> > done = False
>> > while not done:
>> >   try:
>> >      some_function()
>> >      done = True
>> >   except:
>> >      some_function2()
>> >      some_function3()
>>
>> Sure, that works, but I was aiming for something more elegant and
>> Pythonic 

Catching only the specific exceptions you think you can handle would be 
more Pythonic: that way things like sys.exit() will still work inside 
some_function.

> 
> It's hard to get around a while loop if you want to conditionally
> repeat something. There's no built-in way to do what you ask.

I prefer a 'for' loop rather than 'while' so I can limit the number of 
retries.

The following may or may not be 'more pythonic', but is something I've 
used. It's a factory to generate decorators which will retry the 
decorated function. You have to specify the maximum number of retries, 
the exceptions which indicate that it is retryable, and an optional 
filter function which can try to do fixups or just specify some 
additional conditions to be tested.

class TooManyRetries(Exception):
    def __init__(self, inner):
        self.inner = inner
    def __str__(self):
        return 'Too many retries: %s' % (str(self.inner),)

def retryable(max_retries, exceptions, filter=None):
    """Creates a decorator which will retry specific exceptions.
    After there have been too many retries it raises TooManyRetries.
    """
    def decorator(f):
        def wrapper(*args, **kw):
            for i in xrange(max_retries):
                try:
                    return f(*args, **kw)
                except exceptions, e:
                    exc_info = sys.exc_info()
                    # Check for retry even the last time in case the
                    # filter wants to do any logging.
                    if filter is not None and filter(e,
                        i==max_retries-1):
                        pass
                    else:
                        raise
            # If we get here we have exceeded the maximum number of
            # retries.
            raise TooManyRetries, e, exc_info[2]

        wrapper.__name__ = f.__name__
        return wrapper
    return decorator

def isConflictError(error, lasttime):
    if (error.code==500
        and error.hdrs['Bobo-Exception-Type']=='ConflictError'):
        timestamp("Conflict Error", error.filename)
        return True
    return False

retryConflict = retryable(3, HTTPError, isConflictError)

# ----- some code showing it in use -----------
from mechanize import Browser
browser = Browser()

submit = retryConflict(browser.submit)
follow_link = retryConflict(browser.follow_link)

@retryConflict
def openpage(message, url, name=None):
    global PASSWORD
    if PASSWORD is None:
        start = time.time()
        PASSWORD = getpass.getpass()
        #PASSWORD = raw_input("password?")
        end = time.time()
        logger.LASTTIME += end-start # Don't include input in timestamp.

    resp = browser.open(url)
    follow_relay()

    if "ourloginpage" in browser.geturl():
        # Not yet logged in
        timestamp("Got login form")
        browser.select_form(nr=0)
        browser["user"] = USERID
        browser["pass"] = PASSWORD
        resp = browser.submit()
        follow_relay()
        if 'query' in [f.name for f in browser.forms()]:
            if name=="query":
                soup = BeautifulSoup(browser.response().read())
                err = soup.find('td', 'tdbodywarning')
                sys.exit(''.join(err.p.contents).strip())

    timestamp(message, name, url)
    return resp


From inhahe at gmail.com  Thu May 22 20:29:00 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:29:00 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
Message-ID: <5coZj.13951$hv2.4218@bignews5.bellsouth.net>


"bukzor" <workitharder at gmail.com> wrote in message 
news:55bc8846-107e-461a-89de-25c83cbcfa27 at 2g2000hsn.googlegroups.com...
> This question seems easy but I can't figure it out.
> Lets say there's a function:
>
> def f(a, *args):
>    print a
>    for b in args: print b
>
> and elsewhere in your program you have a list and a dict like this:
> args = [2, 3]
> kwargs = {'a':1}
>
> I'd like to get f() to print something like the following, but I can't
> figure out how.
> 1
> 2

I think there's no 'standard' way to do this. but:

import inspect
f(*map(kwargs.get, inspect.getargspec(f)[0])+args)

i don't know if it works because i'm afraid to try it.  if it doesn't the 
solution is something similar to that.




From pavlovevidence at gmail.com  Sun May  4 14:13:32 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 4 May 2008 11:13:32 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org> 
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com> 
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com> 
	<mailman.544.1209917025.12834.python-list@python.org>
Message-ID: <035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>

On May 4, 12:03 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Alexander Schmolck wrote:
> > Gary Herron <gher... at islandtraining.com> writes:
>
> >> But... It's not!
>
> >> A simple test shows that.   I've attached a tiny test program that shows this
> >> extremely clearly.  Please run it and watch it fail.
>
> > In [7]: run ~/tmp/t.py
> > final count: 2000000
> >   should be: 2000000
>
> > (I took the liberty to correct your test to actually do what I said, namely
> > use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> > numpy.array(0)``).
>
> The test was meant to simulate the OP's problem, but even with your
> suggestion of using numpy, it *still* fails!


Ok, so numpy scalars don't support += atomically.  Thank you for your
skepticism in discovering this.

However, what I said was not wholly untrue: code in C extensions is
protected by the GIL and thus not interruptable, unless it either
releases the GIL, or calls back into Python code (which is apparently
what numpy scalars do).

To illustrate, a small extension module is included below.  Just to
make things interesting, I added a long busy loop in between reading
and setting the counter, just to give the other thread maximum
opportunity to cut in.

If you were to compile it and run the test, you would find that it
works perfectly.


===========================
/* atomic.c */

#include <Python.h>
#include <structmember.h>

typedef struct {
    PyObject_HEAD
    long value;
} AtomicCounterObject;

static int init(AtomicCounterObject* self, PyObject* args,
                      PyObject* kwargs) {
    self->value = 0;
    return 0;
}

static PyObject* iadd(AtomicCounterObject* self, PyObject* inc) {
    long incval = PyInt_AsLong(inc);
    long store, i;
    static int bigarray[100000];
    if (incval == -1 && PyErr_Occurred()) return 0;

    store = self->value;

    /* Give the thread plenty of time to interrupt */
    for (i = 0; i < 100000; i++) bigarray[i]++;

    self->value = store + incval;

    return (PyObject*)self;
}

static PyObject* toint(AtomicCounterObject* self) {
    return PyInt_FromLong(self->value);
}

static PyNumberMethods ac_as_number = {
    0,                             /*nb_add*/
    0,                             /*nb_subtract*/
    0,                             /*nb_multiply*/
    0,                             /*nb_divide*/
    0,                             /*nb_remainder*/
    0,                             /*nb_divmod*/
    0,                             /*nb_power*/
    0,                             /*nb_negative*/
    0,                             /*nb_positive*/
    0,                             /*nb_absolute*/
    0,                             /*nb_nonzero*/
    0,                             /*nb_invert*/
    0,                             /*nb_lshift*/
    0,                             /*nb_rshift*/
    0,                             /*nb_and*/
    0,                             /*nb_xor*/
    0,                             /*nb_or*/
    0,                             /*nb_coerce*/
    (unaryfunc)toint,              /*nb_int*/
    0,                             /*nb_long*/
    0,                             /*nb_float*/
    0,                             /*nb_oct*/
    0,                             /*nb_hex*/
    (binaryfunc)iadd,              /*nb_inplace_add*/
    0,                             /*nb_inplace_subtract*/
    0,                             /*nb_inplace_multiply*/
    0,                             /*nb_inplace_divide*/
    0,                             /*nb_inplace_remainder*/
    0,                             /*nb_inplace_power*/
    0,                             /*nb_inplace_lshift*/
    0,                             /*nb_inplace_rshift*/
    0,                             /*nb_inplace_and*/
    0,                             /*nb_inplace_xor*/
    0,                             /*nb_inplace_or*/
    0,                             /* nb_floor_divide */
    0,                             /* nb_true_divide */
    0,                             /* nb_inplace_floor_divide */
    0,                             /* nb_inplace_true_divide */
    0,                             /* nb_index */
};

static PyTypeObject AtomicCounterType = {
    PyObject_HEAD_INIT(NULL)
    0,                             /*ob_size*/
    "AtomicCounter",               /*tp_name*/
    sizeof(AtomicCounterObject),   /*tp_basicsize*/
    0,                             /*tp_itemsize*/
    0,                             /*tp_dealloc*/
    0,                             /*tp_print*/
    0,                             /*tp_getattr*/
    0,                             /*tp_setattr*/
    0,                             /*tp_compare*/
    0,                             /*tp_repr*/
    &ac_as_number,                 /*tp_as_number*/
    0,                             /*tp_as_sequence*/
    0,                             /*tp_as_mapping*/
    0,                             /*tp_hash */
    0,                             /*tp_call*/
    0,                             /*tp_str*/
    0,                             /*tp_getattro*/
    0,                             /*tp_setattro*/
    0,                             /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,            /*tp_flags*/
    0,                             /*tp_doc */
    0,                             /*tp_traverse*/
    0,                             /*tp_clear*/
    0,                             /*tp_richcompare*/
    0,                             /*tp_weaklistoffset*/
    0,                             /*tp_iter*/
    0,                             /*tp_iternext*/
    0,                             /*tp_methods*/
    0,                             /*tp_members*/
    0,                             /*tp_getset*/
    0,                             /*tp_base*/
    0,                             /*tp_dict*/
    0,                             /*tp_descr_get*/
    0,                             /*tp_descr_set*/
    0,                             /*tp_dictoffset*/
    (initproc)init,                /*tp_init*/
    0,
    PyType_GenericNew,
};


static PyMethodDef methods[] = {
    {0} /* sentinel */
};


PyMODINIT_FUNC initatomic(void) {
    PyObject* m;
    if (PyType_Ready(&AtomicCounterType) < 0)
        return;
    m = Py_InitModule("atomic", methods);
    if (m == NULL)
        return;
    Py_INCREF(&AtomicCounterType);
    PyModule_AddObject(m, "AtomicCounter", (PyObject
*)&AtomicCounterType);
}

========================
# actest.py

import threading

N = 200000
import atomic; count = atomic.AtomicCounter()

class timer(threading.Thread):
    def run(self):
        global count
        for i in xrange(N):
            count += 1

def test():
    thread1=timer()
    thread2=timer()
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    print 'final count:', count
    print '  should be:', 2*N

if __name__=='__main__':
    test()
========================


Carl Banks


From google at mrabarnett.plus.com  Fri May  9 09:28:10 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 9 May 2008 06:28:10 -0700 (PDT)
Subject: How can I add spaces where ever I have capital letters?
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com> 
	<mailman.829.1210298651.12834.python-list@python.org>
Message-ID: <769cd101-8b94-45ad-981e-9dbc754ee0d0@i76g2000hsf.googlegroups.com>

On May 9, 3:04 am, "Eric Wertman" <ewert... at gmail.com> wrote:
> Something like this.  I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
>         return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr =  re.sub('[A-Z]',addspace,strng)
>
Alternatively:

newstr = re.sub('([A-Z])',r' \1',strng)

> print newstr.strip()
>
> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would like
> > to print out my CamelCase classes as titles.
>
> > I would like it to do this:
>
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
>
> > Anyone know any easy way to do this?  Thanks.
>


From google at zvis.com  Wed May  7 12:03:55 2008
From: google at zvis.com (Zvi)
Date: Wed, 7 May 2008 09:03:55 -0700 (PDT)
Subject: Problem parsing SOAP envelope with ElementTree
References: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
	<ovdUj.119321$rd2.85572@pd7urf3no>
Message-ID: <01a78e46-567c-48c2-848b-b70e3556e187@v26g2000prm.googlegroups.com>

On May 7, 1:12?am, Waldemar Osuch <waldemar.os... at gmail.com> wrote:
Thanks a lot :)
P.S. It was a complete code, I didn't write anything else.


From bj_666 at gmx.net  Tue May 13 03:27:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 07:27:55 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
Message-ID: <68su7rF2uo1qcU2@mid.uni-berlin.de>

On Mon, 12 May 2008 11:23:07 -0700, Carl Banks wrote:

> On May 12, 3:42 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> Because of the precedent of those names, choosing one of those names
>> doesn't make it clear to the reader that the value is never used;
> 
> 
> Why is it even necessary to document this?  This is the thing that
> baffles me the most about this thread.

I do it (with a "special" name) because static source checkers issue a
warning for unused variables.

Ciao,
	Marc 'BlackJack' Rintsch


From Joshuajruss at gmail.com  Sat May 17 05:02:43 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sat, 17 May 2008 02:02:43 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com>
Message-ID: <82e6d704-95a8-4795-93a3-0650a0eaca27@d45g2000hsc.googlegroups.com>

The reason I ask about text files is the need to save the data
locally, and have it stored in a way where backups can easily be made.
Then if your computer crashes and you lose everything, but you have
the data files it uses backed up, you can just download the program,
extract the backed up data to a specific directory, and then it works
exactly the way it did before you lost it. I suppose a SQLite database
might solve this, but I'm not sure. I'm just getting started, and I
don't know too much about it yet.

I'm also still not sure how to download and associate the pictures
that each entry has for it. The main thing for me now is getting
started. It needs to get information from the web. In this case, it's
a simple XML feed. The one thing that seems that would make it easier
is every post to the feed is very consistent. Each header starts with
the letter A, which stands for Alpike Tech, follow by the name of the
class, the room number, the leading student, and his GPA. All that is
one line of text. But it's also a link to more information. For
example:

A Economics, 312, John Carbroil, 4.0
That's one whole post to the feed. Like I say, it's very simple and
consistent. Which should make this easier.

Eventually I want it to follow that link and grab information from
there too, but I'll worry about that later. Technically, if I figure
this first part out, that problem should take care of itself.





On May 17, 1:08?am, Mensanator <mensana... at aol.com> wrote:
> On May 16, 11:43?pm, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
> > I'm pretty new to programming. I've just been studying a few weeks off
> > and on. I know a little, and I'm learning as I go. Programming is so
> > much fun! I really wish I would have gotten into it years ago, but
> > here's my question. I have a longterm project in mind, and I wont to
> > know if it's feasible and how difficult it will be.
>
> > There's an XML feed for my school that some other class designed. It's
> > just a simple idea that lists all classes, room number, and the person
> > with the highest GPA. The feed is set up like this. Each one of the
> > following lines would also be a link to more information about the
> > class, etc.
>
> > Economics, Room 216, James Faker, 3.4
> > Social Studies, Room 231, Brain Fictitious, 3.5
>
> > etc, etc
>
> > The student also has a picture reference that depicts his GPA based on
> > the number. The picture is basically just a graph. I just want to
> > write a program that uses the information on this feed.
>
> > I want it to reach out to this XML feed, record each instance of the
> > above format along with the picture reference of the highest GPA
> > student, download it locally, and then be able to use that information
> > in various was. I figured I'll start by counting each instance. For
> > example, the above would be 2 instances.
>
> > Eventually, I want it to be able to cross reference data you've
> > already downloaded, and be able to compare GPA's, etc. It would have a
> > GUI and everything too, but I am trying to keep it simple right now,
> > and just build onto it as I learn.
>
> > So lets just say this. How do you grab information from the web,
>
> Depends on the web page.
>
> > in this case a feed,
>
> Haven't tried that, just a simple CGI.
>
> > and then use that in calculations?
>
> The key is some type of structure be it database records,
> or a list of lists or whatever. Something that you can iterate
> through, sort, find max element, etc.
>
> > How would you
> > implement such a project?
>
> The example below uses BeautifulSoup. I'm posting it not
> because it matches your problem, but to give you an idea of
> the techniques involved.
>
> > Would you save the information into a text file?
>
> Possibly, but generally no. Text files aren't very useful
> except as a data exchange media.
>
> > Or would you use something else?
>
> Your application lends itself to a database approach.
> Note in my example the database part of the code is disabled.
> Not every one has MS-Access on Windows.
>
> > Should I study up on SQLite?
>
> Yes. The MS-Access code I have can be easily changed to SQLlite.
>
> > Maybe I should study classes.
>
> I don't know, but I've always gotten along without them.
>
> > I'm just not sure. What would be the most effective technique?
>
> Don't know that either as I've only done it once, as follows:
>
> ## ?I was looking in my database of movie grosses I regulary copy
> ## ?from the Internet Movie Database and noticed I was _only_ 120
> ## ?weeks behind in my updates.
> ##
> ## ?Ouch.
> ##
> ## ?Copying a web page, pasting into a text file, running a perl
> ## ?script to convert it into a csv file and manually importing it
> ## ?into Access isn't so bad when you only have a couple to do at
> ## ?a time. Still, it's a labor intensive process and 120 isn't
> ## ?anything to look forwards to.
> ##
> ## ?But I abandoned perl years ago when I took up Python, so I
> ## ?can use Python to completely automate the process now.
> ##
> ## ?Just have to figure out how.
> ##
> ## ?There's 3 main tasks: capture the web page, parse the web page
> ## ?to extract the data and insert the data into the database.
> ##
> ## ?But I only know how to do the last step, using the odnc tools
> ## ?from win32,
>
> ####import dbi
> ####import odbc
> import re
>
> ## ?so I snoop around comp.lang.python to pick up some
> ## ?hints and keywords on how to do the other two tasks.
> ##
> ## ?Documentation on urllib2 was a bit vague, but got the web page
> ## ?after only a ouple mis-steps.
>
> import urllib2
>
> ## ?Unfortunately, HTMLParser remained beyond my grasp (is it
> ## ?my imagination or is the quality of the examples in the
> ## ?doumentation inversely proportional to the subject
> ## ?difficulty?)
> ##
> ## ?Luckily, my bag of hints had a reference to Beautiful Soup,
> ## ?whose web site proclaims:
> ## ? ? ?Beautiful Soup is a Python HTML/XML parser
> ## ? ? ?designed for quick turnaround projects like
> ## ? ? ?screen-scraping.
> ## ?Looks like just what I need, maybe I can figure it out after all.
>
> from BeautifulSoup import BeautifulSoup
>
> target_dates = [['4','6','2008','April']]
>
> ####con = odbc.odbc("IMDB") ?# connect to MS-Access database
> ####cursor = con.cursor()
>
> for d in target_dates:
> ? #
> ? # build url (with CGI parameters) from list of dates needing
> updating
> ? #
> ? the_year = d[2]
> ? the_date = '/'.join([d[0],d[1],d[2]])
> ? print '%10s scraping IMDB:' ?% (the_date),
> ? the_url = ''.join([r'http://www.imdb.com/BusinessThisDay?
> day=',d[1],'&month=',d[3]])
> ? req = urllib2.Request(url=the_url)
> ? f = urllib2.urlopen(req)
> ? www = f.read()
> ? #
> ? # ok, page captured. now make a BeatifulSoup object from it
> ? #
> ? soup = BeautifulSoup(www)
> ? #
> ? # that was easy, much more so than HTMLParser
> ? #
> ? # now, _all_ I have to do is figure out how to parse it
> ? #
> ? # ouch again. this is a lot harder than it looks in the
> ? # documentation. I need to get the data from cells of a
> ? # table nested inside another table and that's hard to
> ? # extrapolate from the examples showing how to find all
> ? # the comments on a web page.
> ? #
> ? # but this looks promising. if I grab all the table rows
> ? # (tr tags), each complete nested table is inside a cell
> ? # of the outer table (whose table tags are lost, but aren't
> ? # needed and whose absence makes extracting the nested
> ? # tables easier (when you do it the stupid way, but hey,
> ? # it works, so I'm sticking with it))
> ? #
> ? tr = soup.tr ? ? ? ? ? ? ? ? ? ? ? ? ?# table rows
> ? tr.extract()
> ? #
> ? # now, I only want the third nested table. how do I get it?
> ? # can't seem to get past the first one, should I be using
> ? # NextSibling or something? <scratches head...>
> ? #
> ? # but wait...I don't need the first two tables, so I can
> ? # simply extract and discard them. and since .extract()
> ? # CUTS the tables, after two extractions the table I want
> ? # IS the first one.
> ? #
> ? the_table = tr.find('table') ? ? ? ? ?# discard
> ? the_table.extract()
> ? the_table = tr.find('table') ? ? ? ? ?# discard
> ? the_table.extract()
> ? the_table = tr.find('table') ? ? ? ? ?# weekly gross
> ? the_table.extract()
> ? #
> ? # of course, the data doesn't start in the first row,
> ? # there's formatting, header rows, etc. looks like it starts
> ? # in tr number [3]
> ? #
> ? ## ?>>> the_table.contents[3].td
> ? ## ?<td><a href="/title/tt0170016/">How the Grinch Stole Christmas
> (2000)</a> </td>
> ? #
> ? # and since tags always imply the first one, the above
> ? # is equivalent to
> ? #
> ? ## ?>>> the_table.contents[3].contents[0]
> ? ## ?<td><a href="/title/tt0170016/">How the Grinch Stole Christmas
> (2000)</a> </td>
> ? #
> ? # and since the title is the first of three cells, the
> ? # reporting year is
> ? #
> ? ## ?>>> the_table.contents[3].contents[1]
> ? ## ?<td> <a href="/Sections/Years/2001">2001</a> </td>
> ? #
> ? # finally, the 3rd cell must contain the gross
> ? #
> ? ## ?>>> the_table.contents[3].contents[2]
> ? ## ?<td align="RIGHT"> 259,674,120</td>
> ? #
> ? # but the contents of the first two cells are anchor tags.
> ? # to get the actual title string, I need the contents of the
> ? # contents. but that's not exactly what I want either,
> ? # I don't want a list, I need a string. and the string isn't
> ? # always in the same place in the list
> ? #
> ? # summarizing, what I need is
> ? #
> ? ## ?print the_table.contents[3].contents[0].contents[0].contents,
> ? ## ?print the_table.contents[3].contents[1].contents[1].contents,
> ? ## ?print the_table.contents[3].contents[2].contents
> ? #
> ? # and that almost works, just a couple more tweaks and I can
> ? # shove it into the database
>
> ? parsed = []
>
> ? for rec in the_table.contents[3:]:
> ? ? the_rec_type = type(rec) ? ? ? ? ? ? ? ? ? ? ?# some rec are
> NavSrings, skip
> ? ? if str(the_rec_type) == "<type 'instance'>":
> ? ? ? #
> ? ? ? # ok, got a real data row
> ? ? ? #
> ? ? ? TITLE_DATE = rec.contents[0].contents[0].contents ? # a list
> inside a tuple
> ? ? ? #
> ? ? ? # and that means we still have to index the contents
> ? ? ? # of the contents of the contents of the contents by
> ? ? ? # adding [0][0] to TITLE_DATE
> ? ? ? #
> ? ? ? YEAR = ?rec.contents[1].contents[1].contents ? ? ? ?# ditto
> ? ? ? #
> ? ? ? # this won't go into the database, just used as a filter to grab
> ? ? ? # the records associated with the posting date and discard
> ? ? ? # the others (which should already be in the database)
> ? ? ? #
> ? ? ? GROSS = rec.contents[2].contents ? ? ? ? ? ? ? ? ? ?# just a
> list
> ? ? ? #
> ? ? ? # one other minor glitch, that film date is part of the title
> ? ? ? # (which is of no use in the database, so it has to be pulled
> out
> ? ? ? # and put in a separate field
> ? ? ? #
> # ? ? ?temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
> (.*)',str(TITLE_DATE[0][0]))
> ? ? ? temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
> (.*)',str(TITLE_DATE))
> ? ? ? #
> ? ? ? # which works 99% of the time. unfortunately, the IMDB
> ? ? ? # consitency is somewhat dubious. the date is _supposed_
> ? ? ? # to be at the end of the string, but sometimes it's not.
> ? ? ? # so, usually, there are only 5 groups, but you have to
> ? ? ? # allow for the fact that there may be 6
> ? ? ? #
> ? ? ? try:
> ? ? ? ? the_title = temp_title.group(1) + temp_title.group(5)
> ? ? ? except:
> ? ? ? ? the_title = temp_title.group(1)
> ? ? ? the_gross = str(GROSS[0])
> ? ? ? #
> ? ? ? # and for some unexplained reason, dates will occasionally
> ? ? ? # be 2001/I instead of 2001, so we want to discard the trailing
> ? ? ? # crap, if any
> ? ? ? #
> ? ? ? the_film_year = temp_title.group(3)[:4]
> # ? ? ?if str(YEAR[0][0])==the_year:
> ? ? ? if str(YEAR[0])==the_year:
> ? ? ? ? parsed.append([the_date,the_title,the_film_year,the_gross])
>
> ? print '%3d records found ' % (len(parsed))
> ? #
> ? # wow, now just have to insert all the update...
>
> read more ?



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 06:48:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 12:48:02 +0200
Subject: A quick question
In-Reply-To: <mailman.1678.1211970644.12834.python-list@python.org>
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <483d385c$0$7233$426a74cc@news.free.fr>

James a ?crit :
> Hey everyone,
> 
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  

This is what you asked for - range() returns a list of integers.

> How can I get these integers to print as letters?

What you want is not to "get these integers as letters", but to get the 
letters in the word in reversed order.

>  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  
> 

- The naive version:

for i in range(start-1, -1, -1):
     print word[i]


- The naive version with a native attempt to correct (wrt/ your specs) 
formatting:

drow = ''
for i in range(start-1, -1, -1):
     drow += word[i]
print drow

- The canonical pythonic version:

for letter in reverse(word):
     print letter

- The canonical version with correct (wrt/ your specs) formatting:

print ''.join(reversed(word))


- The Q&D (but working) perlish version:

print word[::-1]


HTH


From a.schmolck at gmail.com  Sun May  4 20:37:38 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Mon, 05 May 2008 01:37:38 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
Message-ID: <yfsskwxegbx.fsf@gmail.com>

Gary Herron <gherron at islandtraining.com> writes:

> The test was meant to simulate the OP's problem, but even with your suggestion
> of using numpy, it *still* fails!  

Well, although I haven't tested it extensively, it doesn't appear to fail for
me, with numpy 1.02 and an AMD Athlon(tm) XP 2800+ under linux 2.6, so it is
possible that numpy's implementation has changed wrt. to GIL usage (or that
the platform makes a difference, but that seems less likely):

In [26]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [27]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [28]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [29]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [30]: run ~/tmp/t.py
final count: 10000000
  should be: 10000000

I don't claim to have deep knowledge of threading/GIL issues under python, but
my understanding is that you can certainly write an extension that does this
atomically if required (although the bytecode for immutable and mutable is the
same, I think the problem in the immutable case is that the rebinding that
occurs after the inplaceadd step is to a new object, and hence not a no-op).
This isn't to distract from your and Aahz point downthread: this is inherently
a very brittle way to go about things. On the other hand if you have some
already dodgy legacy code (as the OP indicated) that you want to make work
with a minimum of fuzz, it might still be a reasonable option.

'as


From walterbyrd at iname.com  Mon May 12 22:35:49 2008
From: walterbyrd at iname.com (walterbyrd)
Date: Mon, 12 May 2008 19:35:49 -0700 (PDT)
Subject: frameword vs application server?
References: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
	<68r2sbF2tjrl5U1@mid.uni-berlin.de>
Message-ID: <f60f77b5-64c7-42ca-8f7b-717a9a90e834@s33g2000pri.googlegroups.com>

On May 12, 8:34 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> As mentioned above - in some aspects, that is not really needed. But if
> you want more of an app-server, have a look at ZOPE, Kamaelia and maybe
> even twisted.

Thanks. Kamaelia reminds me of SOA - loosely coupled software services
talking with each other. Interesting stuff.


From superflit at gmail.com  Fri May 23 09:02:09 2008
From: superflit at gmail.com (flit)
Date: Fri, 23 May 2008 06:02:09 -0700 (PDT)
Subject: Advice from senior Members
Message-ID: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>

Hello All,

I am looking for some experience from the senior members.
Now I am doing a simple desktop application, this application will
have 3 main functions:

1- Read information about the desktop system;
2- Interact with the user;
3- Send information to a server.

The first part, reading information about the desktop system, is
already done.
And now I am starting to make the gui for the user, that is when the
question appear:
"What is the best way to make it? divide in files? by classes or
functions?"
I have now one big file with all functions to get the desktop
information.
Should I make one file for the visual functions (wxpython)? another
for the server?
Is productive to divide in files? what is the best way?

It seems like a naive question, maybe easy one, but I am willing to
enjoy the experience from the most senior programmers here.

Thanks


From steve at holdenweb.com  Thu May  1 15:41:45 2008
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 01 May 2008 15:41:45 -0400
Subject: Python Wins "Favorite Scripting Language" Award
Message-ID: <481A1CF9.1010106@holdenweb.com>

The Linux Journal readers apparently suffer the same ambiguity as the 
rest of us when it comes to defining what the difference between a 
scripting language and a programming language.

They do, however, clearly like Python, which they voted their scripting 
language of 2008. PHP, Bash and Perl came in reasonably close on 
Python's heels, but 28.9% of those voting voted for Python.

See all the awards at

   http://www.linuxjournal.com/article/10065

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/


From jcd at sdf.lonestar.org  Fri May  9 10:02:49 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 10:02:49 -0400
Subject: Dynamic generation of images (was Re: Custom Classes?)
In-Reply-To: <4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
Message-ID: <1210341769.3332.16.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 10:33 -0500, Victor Subervi wrote:
> Okay, trying this again with everything working and no ValueError or
> any other errors, here we go:
> 
> Load this code. Unless you use a similar login() script, you will want
> to edit your own values into the user, passwd, db and host:
> 
> #!/usr/bin/python
> 
> import MySQLdb
> 
> import sys,os
> sys.path.append(os.getcwd())
> from login import login
> user, passwd, db, host = login()
> 
> pic = "pic1"
> w = 20
> x = 0
> d = 6
> y = 1
> 
> getpic = "getpic" + str(w) + ".py"
> try:
>   os.remove(getpic)
> except:
>   pass
> code = """
> #!/usr/local/bin/python
> import cgitb; cgitb.enable()
> import MySQLdb
> import cgi
> import sys,os
> sys.path.append(os.getcwd())
> from login import login
> user, passwd, db, host = login()
> form = cgi.FieldStorage()
> picid = int(form["id"].value)
> x = int(form["x"].value)
> pics =
> {1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
> 9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
> pic = pics[x]
> db = MySQLdb.connect(host, user, passwd, db)
> cursor= db.cursor()
> sql = "select %s from products where id='%s';" % (pic, str(picid))
> 
> cursor.execute(sql)
> content = cursor.fetchall()[0][0].tostring()
> cursor.close()
> print 'Content-Type: image/jpeg'
> print
> print content
> """
> script = open(getpic, "w")
> script.write(code)
> script.close()
> 
> 
> 
> and then surf to:
> http://whatever.url/getpic20.py?id=6&x=1
> 
> 
> Also, please re-send the link on how to post good questions to the
> list. I cannot find it.
> TIA,
> Victor

Why are you dynamically creating getpic20.py?

Obviously, in the real script, you probably have several of them:
getpic1.py, getpic2.py, etc., but is there any reason you couldn't just
have one getpic.py, and pass the number in as a parameter in your GET
request, like this:

http://localhost/getpic.py?id=6&x=1&w=20

Then you can just have a static getpic.py.  I've stripped out useless
bits:

* You don't use sys or os, so why import them?
* MySQL makes it difficult for me to replicate your behavior, because I 
  don't have your DB setup.  The DB call has been replaced with a
  dictionary of keys into JPG data, pulled from the filesystem.  Change 
  filenames to jpegs on your own hard drive
* login is useless without MySQL.

So your new getpic.py (statically created) looks like this:

~~~ getpic.py ~~~
#!/usr/local/bin/python

import cgitb; cgitb.enable()
import cgi

pics = { 
    1: open('pic.jpg').read(),
    2: open('pic2.jpg').read()
}
# you could just pass the filename, and then you wouldn't have to load
the
# image data in advance, but this more closely mimics the concept of
your DB 
# setup.

form = cgi.FieldStorage()
x = int(form["x"].value)
pic = pics[x]

print 'Content-Type: image/jpeg'
print
print pic
~~~

Then if you want to include your pictures in a web page, you do

~~~ show_pics.html ~~~
<html>
  <head><title>Pictures</title></head>
  <body>
    <h1>pictures</h1>
    <img src='http://example.com/getpic.py?x=1'/>
    <img src='http://example.com/getpic.py?x=2'/>
  </body>
</html>
~~~

This should work just as well when you refactor the script to pull from
the database.

Hope this helps.  Also, the article on asking good questions is
available here:  http://catb.org/~esr/faqs/smart-questions.html





From phil at freehackers.org  Tue May  6 10:31:49 2008
From: phil at freehackers.org (BlueBird)
Date: Tue, 6 May 2008 07:31:49 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <aa6b861d-8714-413d-aada-b8a1846a3cb4@x41g2000hsb.googlegroups.com>

On May 6, 11:19 am, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>

I would say that, according to documentation, the following should
work:
print p2.communicate()[0]


    Philippe


From Graham.Dumpleton at gmail.com  Sat May 17 23:56:51 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sat, 17 May 2008 20:56:51 -0700 (PDT)
Subject: Arch problems--how do I build PIL to be 64 bit so it plays nicely
	on OS X?
References: <d94878c8-3ea1-4da0-9515-9a8aa7f8210e@x41g2000hsb.googlegroups.com>
Message-ID: <bc6ad6bd-f42a-421f-af45-55a9a23699d1@i36g2000prf.googlegroups.com>

On May 17, 6:16?am, lampshade <mwolff... at gmail.com> wrote:
> Hello,
>
> I'm using python + django to do some web design and I would really
> like to use the python image library as part of this. ?There seems to
> be a problem, however, with apache andmod_pythonbeing 64 bit while
> my python image library(PIL) is only 32 bit.
>
> Does anyone have experience with building the correct architectures so
> that OS X 10.5 plays nicely? ?I think, when it comes down to it, I
> just need PIL at this point to be x86_64 so that it plays with apache
> andmod_python.
>
> Any advice, hand-holding, or sage wisdom?

See:

  http://code.google.com/p/modwsgi/wiki/InstallationOnMacOSX

and also the document it references:

  http://developer.apple.com/releasenotes/OpenSource/PerlExtensionsRelNotes/index.html

Graham


From geonomica at gmail.com  Fri May 23 00:55:41 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 21:55:41 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
Message-ID: <8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>

On 23 Mag, 01:14, Larry Bates <larry.ba... at websafe.com`> wrote:
> gianluca wrote:
> > Hy,
> > I need help about use dll with ctypes. I've compiled my dll C library
> > and I copied it in c:\windows\system32. When I load it with
> > "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> > python don't see the dll function. with dir(myDLL) I've only this:
> > ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> > '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> > '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> > '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> > '_name']
>
> > Could anybody help me
>
> > Thanks
>
> > Gianluca
>
> Since it isn't python, dir can'd do much introspection on the object to produce
> the type of output you desire.  You have to know the functions (methods) that
> you want to call in your dll and call them.
>
> -Larry Bates


Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
exception like this:

Traceback (most recent call last):
  File "<pyshell#18>", line 1, in <module>
    myDLL.myFUNCT()
  File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
    func = self.__getitem__(name)
  File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: function 'myFUNCT' not found

Thanks for help


From casey.mcginty at gmail.com  Sat May 24 17:40:17 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sat, 24 May 2008 11:40:17 -1000
Subject: Code correctness, and testing strategies
In-Reply-To: <Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
Message-ID: <ae3f58470805241440i4218403i903c8e1a992abbc5@mail.gmail.com>

> Seriously, 10 hours of testing for code developed in 10 hours? What
> > kind of environment do you write code for? This may be practical for
> > large companies with hordes of full-time testing & QA staff, but not
> > for small companies with just a handful of developers (and where you
> > need to borrow somone from their regular job to do non-developer
> > testing).
>
> I've done plenty of projects using conventional methods in small companies.
> If anything test time equal to development time is a vast underestimate.
>
> Frederick Brooks general rule in Mythical Man Month is a project should
estiamte1/6 coding and1/2 test time. In other words, 1 hour of coding time
should have 3 hours of testing time.

*"In examining conventionally scheduled projects, I have found that few
allowed one-half of the projected schedule for testing, but that most did
indeed spend half of the actual schedule for that purpose. Many of these
were on schedule until and except in system testing." -MMM
*
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From bjourne at gmail.com  Thu May 29 17:08:28 2008
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 29 May 2008 23:08:28 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <740c3aec0805291408w40eb3ca1ma07be5c62fe5a63d@mail.gmail.com>

Open('3rd', 'w').writelines(set(open('2nd').readlines())-set(open('1st')))

2008/5/29, loial <jldunn2000 at googlemail.com>:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
mvh Bj?rn


From inhahe at gmail.com  Sun May 18 01:00:33 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 01:00:33 -0400
Subject: help compiling Python on vs 2008!
Message-ID: <8JOXj.48140$3v1.32406@bignews3.bellsouth.net>

"inhahe" <inhahe at gmail.com> wrote in message news:...
> VS2005 seems to be officially supported.  Here's part of the readme file 
> in the PCBuild8 directory in the Python 2.5 source.
>
> "
> Building Python using VC++ 8.0
> -------------------------------------
> This directory is used to build Python for Win32 platforms, e.g. Windows
> 95, 98 and NT.  It requires Microsoft Visual C++ 8.0
> (a.k.a. Visual Studio 2005).  There are two Platforms defined, Win32
> and x64.
> (For other Windows platforms and compilers, see ../PC/readme.txt.)
> "
>
> Although I take your point about sharing resources.  I'm not sure I should 
> bother compiling 2.6, since I'll probably come across/already use modules 
> that I need that don't support 2.6 since it's so new.  So it would be nice 
> to know why following the instructions doesn't work.  Compilers never work 
> for me, though.. even when I follow instructions and they work for 
> everybody else.  It's like a schroedinbug - I just don't expect them to 
> work.  As a matter of principle, though, it /should/ work.. so it's gotta 
> be *somebody's* job to debug this! :P
>

Actually, I was under the impression that the socket module relied on one of 
the external libraries to work, since it didn't work when I compiled it. 
But reading the readme again I realized that the socketmodule is supposed to 
compile out of the box.  So I compiled Python again on VS2005 instead of 
2008 (the error I posted that didn't work on 2008 or 2005 was trying to 
compile one of the external libraries), and the socket module seems to work. 
The external libraries don't seem that important.  So it was partly my 
fault.. but still, the external libraries didn't compile like they said they 
would. =P





From marlin_rowley at hotmail.com  Fri May 16 19:24:46 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:24:46 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
Message-ID: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M


From: marlin_rowley at hotmail.comTo: robert.kern at gmail.com; python-list at python.orgSubject: RE: numpy.frombuffer != unpack() ??Date: Fri, 16 May 2008 17:31:30 -0500


Thank you!  That solved it! -M

> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 17:25:00 -0500> > Marlin Rowley wrote:> > All:> > > > I'm getting different floating point values when I use numpy vs. unpack().> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > buffer = unpack("!f", byte)> > > > frgba[0] != buffer[0]> > > > why? This is forcing me use the unpack() function since it's giving me > > the correct values. What am I doing wrong?> > Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most > likely, you are on a little-endian platform. All of the dtypes in numpy default > to the native-endianness unless specified. If you want to read big-endian data > using numpy, do this:> > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > If you have any more problems with numpy, please join us on the numpy mailing > list. When reporting problems, please try to provide a small but complete > snippet of self-contained code, the output that you got, and explain the output > that you expected to get. Thank you.> > http://www.scipy.org/Mailing_Lists> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list

E-mail for the greater good. Join the i?m Initiative from Microsoft. 
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From NpOeStPeAdM at nnowslpianmk.com  Sat May 31 03:36:27 2008
From: NpOeStPeAdM at nnowslpianmk.com (Peter Duniho)
Date: Sat, 31 May 2008 00:36:27 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
Message-ID: <op.ub0cq1fy8jd0ej@petes-computer.local>

On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:

> Arne Vajh?j wrote:
>> Stephan Bour wrote:
>>> Lew wrote:
>>> } John Thingstad wrote:
>>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> } > I don't like the style, but many do.
>>> }
>>> } Please exclude the Java newsgroups from this discussion.
>>>
>>> Did it ever occur to you that you don't speak for entire news groups?
>>
>> Did it occur to you that there are nothing about Java in the above ?
>
> Looking at the original post, it doesn't appear to be about any specific
> language.

Indeed.  That suggests it's probably off-topic in most, if not all, of the  
newsgroups to which it was posted, inasmuch as they exist for topics  
specific to a given programming language.

Regardless, unless you are actually reading this thread from the c.l.j.p  
newsgroup, I'm not sure I see the point in questioning someone who _is_  
about whether the thread belongs there or not.  Someone who is actually  
following the thread from c.l.j.p can speak up if they feel that Lew is  
overstepping his bounds.  Anyone else has even less justification for  
"speaking for the entire newsgroup" than Lew does, and yet that's what  
you're doing when you question his request.

And if it's a vote you want, mark me down as the third person reading  
c.l.j.p that doesn't feel this thread belongs.  I don't know whether Lew  
speaks for the entire newsgroup, but based on comments so far, it's pretty  
clear that there unanimous agreement among those who have expressed an  
opinion.

If you all in the other newsgroups are happy having the thread there,  
that's great.  Please feel free to continue with your discussion.  But  
please, drop comp.lang.java.programmer from the cross-posting.

Pete


From torriem at gmail.com  Fri May  2 10:53:56 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 02 May 2008 08:53:56 -0600
Subject: Finally had to plonk google gorups.
In-Reply-To: <2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>	<87abjne42n.fsf@physik.rwth-aachen.de>	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>	<87r6cncp4r.fsf@physik.rwth-aachen.de>	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
Message-ID: <481B2B04.6060302@gmail.com>

Shawn Milochik wrote:
> How does one "plonk" stuff from Google Groups? Specifically, how
> can this be done in Gmail?

Set up a filter that looks for some phrase in the mail headers that
identifies messages originating from google groups.  Gmail's filters are
fairly flexible.  I'd probably just have it look for certain words.
Look at an e-mail's source (raw view) and particularly check in the
headers for things to filter by.


From __peter__ at web.de  Fri May  9 08:39:43 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 09 May 2008 14:39:43 +0200
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <g01gmb$ke4$03$1@news.t-online.com>

Viktor wrote:

> Can somebody give me an explanation what happened here (or point me to
> some docs)?
> 
> Code:
> 
> HMMM = None
> 
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)

This prints the id() of the local (to the function w()) HMMM variable

>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)

while this prints the id() of the global HMMM variable. Python assumes that
a variable is local to a function if there is an assignment to that
variable anywhere inside that function.

If you want to change the variable (Python-lingo "rebind the name") HMMM
declare it as global in the function:

def w(fn):
    global HMMM
    # ...
    HMMM = fn
    # ...

Otherwise I've no idea what you are trying to do here...

Peter


From daveparker at flamingthunder.com  Wed May 28 09:22:53 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 06:22:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
Message-ID: <5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>

> Does this mean that Flaming Thunder requires explicit checking rather
> than offering exceptions?

Right now, yes, Flaming Thunder has minimal error handling.  But error
handling is rising on the list of priorities for the next few weeks
(arrays, matrices, and 3D graphics are the hightest).

I think in a month or two, Flaming Thunder will be using catch/throw
exception and error handling.  So, for example:

Set result to catch(read x from "input.txt".).
If result is an error then go to quit.

If not caught, errors will propagate up and if they they hit the top
level, cause the program to write an error message and exit.

Using only catch instead of try/catch has several advantages that I
can see.  1) it gets rid of all the impotent try/catch/throw
statements cluttering up Java, etc.  2) since all Flaming Thunder
statements return values (like C statements), Catch also gives you a
single, uniform, syntactically unambiguous way to embed statements (or
whole statement lists) into expressions -- without causing the
syntactic problems of = statements in if statements or the obfuscation
of question mark notation, etc.  For example:

If catch(set x to y+z.) < 0.1 then go to tinyanswer.

On May 22, 4:19?pm, Brian Quinlan <br... at sweetapp.com> wrote:
> Dave Parker wrote:
> >> Or just:
>
> >> If command is "quit" ...
>
> > Hmmm. ?In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> > for assigning and checking types. ?For example, to read data from a
> > file and check for errors:
>
> > ? ? ?Read data from "input.txt".
> > ? ? ?If data is an error then go to ...
>
> Hey Dave,
>
> Does this mean that Flaming Thunder requires explicit checking rather
> than offering exceptions?
>
> Cheers,
> Brian



From gagsl-py2 at yahoo.com.ar  Tue May 27 11:09:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 12:09:13 -0300
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
Message-ID: <op.ubti1njdx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 11:52:25 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:

> Oh. Never mind the details, let's just say that having 2.3 and
> 2.5 installed on the same machine can lead to confusion
> about exactly which one you're running a script under.
> Duh.

You might change the prompt; put these lines in your sitecustomize.py (or  
create it if you don't have one):

import sys
sys.ps1 = 'p23> '
sys.ps2 = ' ... '

> Sorry. Thanks. I don't suppose that decorators are available
> from __future__ somehow in 2.3?

No. But a decorator is only syntax sugar.

@decorator
def f():
   ...

is the same thing as:

def f():
   ...
f = decorator(f)

(just more convenient)

-- 
Gabriel Genellina



From XX.XmcX at XX.XmclaveauX.com  Mon May 12 01:25:48 2008
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 12 May 2008 07:25:48 +0200
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
	<77887b15-0bae-43b7-a2ac-d0f079d8c80c@p39g2000prm.googlegroups.com>
Message-ID: <mn.61bd7d8518c3bb84.46195@XX.XmclaveauX.com>

Hi!

> You want 2*(3+4) to return (7,7)?

For have that:  2*(3+4,)




-- 
@-salutations

Michel Claveau




From deets at nospam.web.de  Sun May 18 16:31:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 22:31:44 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
Message-ID: <69bi20F31j4kdU1@mid.uni-berlin.de>

Agustin Villena schrieb:
> Hi!
> 
> is there anyway to show the class of a method in an exception's
> traceback?
> 
> For example, the next code
> 
> class Some(object):
>     def foo(self,x):
>         raise Exception(x)
> 
> obj = Some()
> obj.foo("some arg")
> 
> produces the next traceback
> 
> Traceback (most recent call last):
>   File "<string>", line 231, in run_nodebug
>   File "G:\dev\exceptions\sample.py", line 7, in <module>
>     obj.foo("some arg")
>   File "G:\dev\exceptions\sample.py", line 3, in foo
>     raise Exception(x)
> Exception: some arg
> 
> I want to improve the line
> File "G:\dev\exceptions\sample.py", line 3, in foo
> 
> to
> File "G:\dev\exceptions\sample.py", line 3, in Some.foo
> 
> Is this improvement feasible

It should be. You can get a dictionary of the locals of an exception 
stack frame, of which you could extract the self-parameter's class.

Diez


From larry.bates at websafe.com`  Tue May  6 16:17:24 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 06 May 2008 15:17:24 -0500
Subject: read line
In-Reply-To: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
References: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
Message-ID: <euadncEHXvd6Ib3VnZ2dnUVZ_r6rnZ2d@comcast.com>

moustafa.elmihy at gmail.com wrote:
> hi every body,
> 
> I'm a new python user and I'm making a program to run useing Abaqus
> and there is something I can't do,
> 
> if i have a text file that has a line like this " 10   20  30     40
> 50" and I wana do the coding to put every number of these like 10 or
> 20 in a separate variable .. any suggestions ??
> 
> thanks in advance

The problem with you not actually trying anything and posting it here is that we 
have no real idea if 10, 20, ... 50 should be strings, integers, floats, 
hexadecimal, or decimal "variables".

Assuming you mean integers:

fp=open('textfile.txt')
l=fp.readline()
a,b,c,d,e = [int(x) for x in l.split()]
fp.close()

More likely you need:
values = [int(x) for x in l.split()]

-Larry


From space.captain.face at gmail.com  Thu May 29 21:31:05 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 18:31:05 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1742.1212075712.12834.python-list@python.org>
Message-ID: <ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>

On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>
> You can use the shell COM objects to access media properties
> as shown by Explorer.
>
> import win32com.client
> sh=win32com.client.Dispatch('Shell.Application')
>
> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> ns=sh.NameSpace(folder)
>
> ## the column index for Artist may vary from folder to folder
> for c in range(0,255):
>     colname=ns.GetDetailsOf(None, c)
>     if colname=='Artists':  ## This shows up as just Artist on XP
>         for i in ns.Items():
>             artist=ns.GetDetailsOf(i, c)
>             if artist:
>                 print ns.GetDetailsOf(i, 0), artist
>         break
>
>             Roger

I shall give that a go. (is the module you reference this one?
http://python.net/crew/mhammond/win32/Downloads.html )


From Scott.Daniels at Acm.Org  Thu May  8 08:50:42 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 08 May 2008 05:50:42 -0700
Subject: Problems with os.walk
In-Reply-To: <877ie52p3p.fsf@mulj.homelinux.net>
References: <mailman.738.1210231614.12834.python-list@python.org>
	<877ie52p3p.fsf@mulj.homelinux.net>
Message-ID: <o8Odnc8OtJqxaL_VnZ2dnUVZ_gydnZ2d@pdx.net>

Hrvoje Niksic wrote:
> <Dominique.Holzwarth at ch.delarue.com> writes:
> 
>>     (dirpath, dirnames, filenames) = os.walk(scriptPath)
> 
> You're supposed to loop over values in different directories, like
> this:
> 
> for dirpath, dirnames, filenames in os.walk(scriptPath):
>     ... handle dirpath with dirnames and filenames ...
> 
> The loop will be executed for each subdirectory (direct and indirect)
> of scriptPath.

And if you are simply hand-experimenting, try somthing like:
     generator = os.walk(scriptPath)
     dirpath, dirnames, filenames = generator.next()
     ...
     dirpath, dirnames, filenames = generator.next()
     ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:23:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:23:38 +0200
Subject: Which way is faster for a simple web reporting system: django,
	web.py  or cgi
In-Reply-To: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>
References: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>
Message-ID: <48240a09$0$7184$426a74cc@news.free.fr>

idev a ?crit :
> Hi all,
> 
> May be this is a dump question, but it makes me crazy in my research.
> I am not a developer but I have experience with web development (PHP)
> in a past. Most my activities are around database administration and
> design. For most database administration tasks I am using Python. Very
> often I need to come up very quickly with web interface or web
> application to a database, more then less complicated. The standard
> set is:
> 
> * speed of the development (I think a framework is the way, but which
> one?)
> * user authorization (my preferences are sessions)
> * form validation for input data
> * file uploading
> * export data to different format like csv, pdf, xml
> 
> For example I need to create a simple reporting system. Using
> different filters like HTML drop down lists, radio buttons, check
> boxes and etc., I need to generate different output to my team and
> managers.
> 
> I realize that today is very popular and useful, using a framework.
> Which Python framework or solution will be more faster to start (i.e.
> for start, usually I have maximum two weeks, if a project looks like a
> stable I can get three, four weeks), flexible (i.e. using SQL queries
> together with views) and easier in integration: django, web.py, CGI or
> something else?

Given your background and requirements, I'd strongly recommand Django.



From aguirre.adolfo at gmail.com  Wed May  7 16:50:06 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 13:50:06 -0700 (PDT)
Subject: Looking for Fredrik Lundh; documentation and code examples for 
	elementtree
References: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
Message-ID: <f0ac93eb-1436-4f8f-9987-5d4fe834aab5@8g2000hse.googlegroups.com>

On May 7, 4:43 pm, dj <d.a.aberna... at gmail.com> wrote:
> Hello All,
>
> I am trying to get in touch with Mr. Lundh. I am looking for exmaple
> code regarding the use of elementtree. I have read through most of the
> examples onhttp://effbot.organd I am hoping he can suggest some
> others. Additionally, I am hoping he can give me an example use of the
> comment method. I have tried a couple times, but I can not figure it
> out. Thank you so very much.
>
> DJ

Las address I had of him was: fredrik at pythonware.com good luck,
Adolfo


From jhenRemoveThis at talk21.com  Sat May 10 17:07:33 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sun, 11 May 2008 07:07:33 +1000
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <68mh4lF2rknfoU2@mid.individual.net>

wxPythoner at gmail.com wrote:

> If you are in the interactive prompt of the Python interpreter
> and you do this
> 
> print """Testing\"""   or   print '''Testing\'''
> 
> you get three dots [...] as if Python expects a code block. If
> you press Enter, you get three dots again, and again, and
> again... You can't get out of the code block with pressing the
> Enter key; you have to press Ctrl+Z (if you're in Linux) in
> order to get out of that code block, which then throws you
> back to the Linux command line, but before that it prints this
> line
> 
> [1]+  Stopped                 python
> 
> 
> If you do
> 
> print "Testing\"   or   print 'Testing\'
> 
> you get an error, but not of you use the triple quotes. Is
> that a bug in the interpreter perhaps?

>>> print """testing\"""
"""
testing"""

John


From dkcombs at panix.com  Thu May 29 20:22:36 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 00:22:36 +0000 (UTC)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <g1nhcc$d5e$1@reader2.panix.com>

In article <68i6b5F2soauaU1 at mid.individual.net>,
Waylen Gumbal <wgumgfy at gmail.com> wrote:
>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>> >
>> > I don't think Xah is trolling here (contrary to his/her habit)
>> > but posing an interesting matter of discussion.
>>
>> It might be interesting in the abstract, but any such discussion, when
>> cross-posted to multiple language groups on usenet, will inevitably
>> devolve into a flamewar as proponents of the various languages argue
>> about which language better expresses the ideas being talked about.
>> It's like a law of usenet or something.
>>
>> If Xah wanted an interesting discussion, he could have posted this to
>> one language-neutral group such as comp.programming. He doesn't want
>> that - he wants the multi-group flamefest.
>
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 
>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.
>
>-- 
>wg 

Not one person on the planet agrees with me, I believe, but
it's always seemed to me that an *advantage* to posting to
multiple groups (especially ones generally "interested" in similar
subject matter but NOT subject to huge poster/lurker/answerer overlap,
er, without too many *people* getting multiple copies of the *same*
post) is that it would provide an opportunity of a widely-dispersed
bunch of people to have a *joint* discussion, with comments hopefully
coming in from a *variety* of viewpoints.

David





From lucaspm at dcc.ufba.br  Fri May  9 09:30:25 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Fri, 9 May 2008 10:30:25 -0300
Subject: "prove"
In-Reply-To: <9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>
References: <mailman.770.1210254618.12834.python-list@python.org>
	<48240c00$0$7184$426a74cc@news.free.fr>
	<9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>
Message-ID: <9f4be2240805090630m1fa1363ay891c65d2e4395e6@mail.gmail.com>

Thanks for all the answers. I bet I will convince this guy!


From znfmail-pythonlang at yahoo.com  Fri May 30 09:58:16 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Fri, 30 May 2008 09:58:16 -0400
Subject: convert string containing list to list (or tuple) type
Message-ID: <g1p15p$4jo$1@aioe.org>

I'm reading from a database a column that has a list of codes (comma 
seperated). When I read in the list I have a single value, see code sample 
below values for a, b, and c. These represent possible values in my 
database. I need to loop through each value so I can expand my data from 
this compressed view.

My code below works and creates my desired output but I believe there must 
be a better way this is very messy. My messy function that I'd like to 
replace is lst_codes(codes). Any alternative suggestions?

this is what I begin with
a = ',P,'
b = ',I,G,AQ,ET,K,BF,'
c = ',DZ,'
this is what I want (lists or tuples are fine)
['P']
['I', 'G', 'AQ', 'ET', 'K', 'BF']
['DZ']


def lst_codes(codes):
    """ turn a string of comma seperated codes into a real list object """
    i = 0
    lstD = []
    while i < len(codes):
        a = codes[i]
        b = ","
        if (i + 1) < len(codes):
            b = codes[i + 1]
            i = i + 1
        else:
            b = ","

        if b <> ",":
            lstD.append(a + b)
            i = i + 2
        else:
            lstD.append(a)
            i = i + 1
    return lstD


a = ',P,'
b = ',I,G,AQ,ET,K,BF,'
c = ',DZ,'

for ea in (a,b,c):
    print lst_codes(ea.strip(","))




From nick at craig-wood.com  Fri May 23 09:30:08 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 08:30:08 -0500
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
	<4836b62b$0$24427$426a74cc@news.free.fr>
Message-ID: <slrng3dfn3.7jn.nick@irishsea.home.craig-wood.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>  Nick Craig-Wood a ?crit :
> > Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
> >>> Can someone suggest an efficient way of calling method whose name is
> >>> passed in a variable?
> >>>
> >>  method = getattr(obj, 'method_name', None)
> >>  if callable(method):
> >>       method(args)
> > 
> > I think that that is needless LBYL...
> 
>   From experience, it isn't.

> >    getattr(obj, 'method_name')(args)
> > 
> > Will produce some perfectly good exceptions
> 
>  The problem is that you can't tell (without reading the exception's 
>  message and traceback etc) if the exception happened in you code or 
>  within the called method.

I guess it depends on whether you are expecting it to ever fail or
not.  If a user types in method_name then yes you are right checking
stuff and producing a nice error is good.  However if it is part of
your internal program flow and you never expect it to go wrong in
normal operation then I'd be quite happy with the exception and
backtrace to debug the problem.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From stefan_ml at behnel.de  Fri May  9 06:02:04 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 12:02:04 +0200
Subject: xml.etree Syntax of path?
In-Reply-To: <68ij33F2tl90fU1@mid.individual.net>
References: <68ij33F2tl90fU1@mid.individual.net>
Message-ID: <4824211C.8040409@behnel.de>

Thomas Guettler wrote:
> I think the documentation of xml.etree is missing something[1].
> 
> {{{
> find(path)
>     Finds the first toplevel element with given tag. Same as
> getroot().find(path). path is the element to look for.
> }}}
> 
> According to the source etree has limited support for xpath. I think it
> should be documented what 'path' should look like to.

You mean like this?

http://effbot.org/zone/element-xpath.htm

Note that the method is called "find()", not "execute_xpath()" or something.
If you want full XPath support, lxml is your friend.

Stefan


From fuzzyman at gmail.com  Sat May 24 13:10:23 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:10:23 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
	<roy-0E13C2.10572924052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <6b034fe0-3bc3-46d3-a8a4-09fcc0080754@j22g2000hsf.googlegroups.com>

On May 24, 3:57?pm, Roy Smith <r... at panix.com> wrote:
> In article
> <a2c4d209-e203-4b43-aa57-f9f0248b2... at a70g2000hsh.googlegroups.com>,
>
> ?Fuzzyman <fuzzy... at gmail.com> wrote:
> > Whilst I understand your point, I think the danger is that you end up
> > with hidden dependencies on the test order - which you're not aware of
> > and that the tests never expose.
>
> Well, yes. ?But, this is no worse than the current situation, where the
> tests are run in alphabetical order by default. ?You could still have
> hidden dependencies and not realize it.

Fair point. I'd still be -1 on the addition of this patch, but +1 on
the addition of a randomizer.

Michael Foord
http://www.ironpythoninaction.com/


From arnodel at googlemail.com  Thu May 15 16:44:38 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 21:44:38 +0100
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
Message-ID: <m2d4nn8fgp.fsf@googlemail.com>

Casey <casey.mcginty at gmail.com> writes:

> Hi,
>
> I have some classes that print variable outputs depending on their
> internal state, like so:
>
> def __str__(self):
>     out = []
>     if self.opt1: out += ['option 1 is %s' % self.opt1']
>     if self.opt2: out += ['option 2 is %s' % self.opt2']
>     ....
>     return '\n'.join(out)
>
> Is there any way to make this cleaner?

Maybe.

Have a dictionary of options rather than individual attributes;
options not in the dictionary are not set. E.g.

mask = {
    'opt1': 'option 1 is %s',
    'opt2': 'option 2 is %s',
    ...
    }

def __str__(self):
    return '\n'.join(mask[o] % v for o,v in self.options.iteritems())

-- 
Arnaud


From asmodai at in-nomine.org  Thu May  1 04:15:13 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Thu, 1 May 2008 10:15:13 +0200
Subject: best way to host a membership site
In-Reply-To: <d97d19ef-c484-44b2-b3c6-a186a0f8ca35@2g2000hsn.googlegroups.com>
References: <53034dcc-7346-4f71-889c-3278c9e813ec@w1g2000prd.googlegroups.com>
	<mailman.378.1209566587.12834.python-list@python.org>
	<d97d19ef-c484-44b2-b3c6-a186a0f8ca35@2g2000hsn.googlegroups.com>
Message-ID: <20080501081513.GH78165@nexus.in-nomine.org>

-On [20080430 17:48], Aaron Watters (aaron.watters at gmail.com) wrote:
>Wow.  An initial glance looks great!  I need help with pronunciation,
>though :(.

Werkzeug is supposed to be pronounced in German.
It translates to 'tool'.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
Heaven can wait 'till another day...


From goldnery at gmail.com  Mon May 26 17:40:18 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 14:40:18 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
Message-ID: <1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>

On May 26, 11:25 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 26 May 2008 12:06:02 -0700 (PDT), Gandalf <goldn... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > I use WX on windows XP and I try to generate an event when the user is
> > clicking the keyboard while the application frame is not in focus.
> > All I manged to do were while the application frame is in focus
> > Can someone please show me how to do it?
>
>         I'm no expert, but I think normal operation is that the operating
> system does not send events to an application unless that application
> has the focus.
>
>         To counter that, though, there is no doubt some way to inform the OS
> that an application is interested in all events, even those not meant
> for it directly.  As such a capability tends to be OS specific, it may
> not be easily exposed. Under Windows, this probably requires getting a
> handle on the "desktop window" and processing messages that it sees
> (without failing to pass them on to whatever other windows are looking
> for them)
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com              wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

Thanks!
Anyone know which library should i learn then?


From s0suk3 at gmail.com  Thu May 22 10:20:11 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 07:20:11 -0700 (PDT)
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
Message-ID: <cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>

On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>
> > Hi, I wanted to know how cautious it is to do something like:
>
> > f = file("filename", "rb")
> > f.read()
>
> > for a possibly huge file. When calling f.read(), and not doing
> > anything with the return value, what is Python doing internally? Is it
> > loading the content of the file into memory (regardless of whether it
> > is discarding it immediately)?
>
> I am not a Python interpreter developer, but as user, yes I'd expect that to
> happen. The method doesn't know you are not doing anything with its return
> value.
>
> > In my case, what I'm doing is sending the return value through a
> > socket:
>
> > sock.send(f.read())
>
> > Is that gonna make a difference (memory-wise)? I guess I'm just
> > concerned with whether I can do a file.read() for any file in the
> > system in an efficient and memory-kind way, and with low overhead in
> > general. (For one thing, I'm not loading the contents into a
> > variable.)
>
> Doesn't matter. You allocate a string in which the contents is loaded (the
> return value of 'f.read()', and you hand over (a reference to) that string to
> the 'send()' method.
>
> Note that memory is allocated by data *values*, not by *variables* in Python
> (they are merely references to values).
>
> > Not that I'm saying that loading a huge file into memory will horribly
> > crash the system, but it's good to try to program in the safest way
> > possibly. For example, if you try something like this in the
>
> Depends on your system, and your biggest file.
>
> At a 32 bit platform, anything bigger than about 4GB (usually already at around
> 3GB) will crash the program for the simple reason that you are running out of
> address space to store bytes in.
>
> To fix, read and write blocks by specifying a block-size in the 'read()' call.

I see... Thanks for the reply.

So what would be a good approach to solve that problem? The best I can
think of is something like:

MAX_BUF_SIZE = 100000000  # about 100 MBs

f = file("filename", "rb")
f.seek(0, 2)  # relative to EOF
length = f.tell()
bPos = 0

while bPos < length:
    f.seek(bPos)
    bPos += sock.send(f.read(MAX_BUF_SIZE))


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:36:37 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:36:37 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
Message-ID: <48340938$0$10773$426a74cc@news.free.fr>

Simon Forman a ?crit :
> On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
>> On May 20, 10:50 am, s0s... at gmail.com wrote:
>>
>>
>>
>>> You don't need all those conditionals. A set differs from a list
>>> precisely in the fact that each element is unique. And since the
>>> function is expecting "s" to be an iterable object, it can be
>>> constructed even without a for loop:
>>> def compress(s):
>>>     return list(set(s))
>>> That does the trick.
>> Only if order does not need to be maintained.  list(set(s)) will not
>> necessarily keep the unique characters in the order they are seen.
>> We'll have to check with the OP to see if this is important (I just
>> assumed that it was because of the use of list comps).
>>
>> -- Paul
> 
> 
> If order is important, you can use sorted() instead of list() like so:
> 
> def compress(s):
>     new = sorted(set(s), key=s.index)
>     return return ''.join(new)

This won't still preserve the *original* order.



From michele.simionato at gmail.com  Sat May 24 23:35:52 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sat, 24 May 2008 20:35:52 -0700 (PDT)
Subject: class-oriented rather than object-oriented?
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <bbd54306-576b-4f7c-93e7-7dcffc5a8572@k30g2000hse.googlegroups.com>

On May 25, 4:34 am, notnorweg... at yahoo.se wrote:
> i have some confusion over this.
>
> sure a class is basically a classification, like for example an animal
> or flower. and an object/instance of that class is then for example a
> cat.
>
> an object is an instance of a class. that i know, i also know how to
> program with classes etc.
>
> i am just confused about the term object-oriented.
>
> wouldnt class-oriented be more fitting? at least for java since what
> you do is divide everything into classes.

Unfortunately there is a lot of confusion in the terminology.
Basically, everybody uses the term "object oriented" with
a different meaning. So, it is not your fault and yes, a
better name for Java would be class-oriented language.

> in python i dont or at leats not as much.
>
> does object-oriented refer to that everything(strings, ints etc) are
> all objects? so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

Yes, this is the common meaning of the sentence
"everything is an object", in the sense that type(x)
gives you the class of x for any x.

> are python functions objects?

Yes.

>>> def f(x): pass
>>> type(f)
<type 'function'>

> can a functional language be object-oriented or an objectoriented
> language be functional?

Yes and not. A *pure* functional language has no mutation,
whereas the basic tenet of object orientation is having
something with a mutable state. In practice, most functional
languages are not pure, and most object oriented language
also allows functional construct.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

"Passing a message" is another way of saying "calling a
method". In a language such as Python (or Smalltalk, or
Ruby) classes as objects (in the sense that they are
instances of some class, the so-called metaclass)
so you can "pass a message" to the class.
Notice that the message passing methaphor only works
with languages with single dispatch; the Common Lisp
Object System (CLOS), which is based on multiple
dispatch, goes in an entirely different category
(no message passing there). A generic function system
is not an object system in the traditional sense (I
mean the sense of Smalltalk) so it should have a
different name, but the mistake has been made twenty
years ago and there is nothing we can do now.

     Michele Simionato


From renesd at gmail.com  Thu May  1 02:02:57 2008
From: renesd at gmail.com (illume)
Date: Wed, 30 Apr 2008 23:02:57 -0700 (PDT)
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
Message-ID: <9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>

Hi,

after a little research it appears that win9x is not supported by the
msvcr90.dll run time.

Can you confirm this Lenard?

Has anyone tested the new python binaries that link to msvcr90.dll on
win9x machines?

cheers,




On May 1, 3:05 pm, "L. Lindstrom" <spam-t... at telus.net> wrote:
> L. Lindstrom wrote:
> > Christian Heimes wrote:
> >> L. Lindstrom schrieb:
> [snip]
> >>> [B]esides heap management and FILE pointers, is there any reason SDL, or
> >>> any C dependency, needs to link to the same C run-time as Python? If I
> >>> ensure SDL frees memory it allocates and does not directly access a file
> >>> opened by Python can I just use another C run-time such as msvcrt?
>
> >> Your analysis of the problem and the implication of mixing CRTs is
> >> correct. However ...
>
> >> It should be trivial to modify the build systemof SDL so that the
> >> manifest is integrated into the DLLs. Everything else is a hack. It
> >> *should* work and in reality it *does* work for most cases. But someday
> >> you'll hit a solid wall and get strange and hard to debug segfaults.
>
> [snip]
> > Linking to msvcr90.dll is possible with MinGW. The problem is with the
> > configure scripts. So I can run configure against msvcrt.dll, then
> > switch to mscvr90.dll for make. If this works I will make SDL and a test
> > program available on-line so someone can find the appropriate manifests.
>
> Here is my attempt to link SDL and a test program with msvcr90.dll. It
> can be found athttp://www3.telus.net/len_l/pygame. The md5sum is:
>
> f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip
>
> Both lack a manifest. The test program and SDL work when a surrogate
> run-time is provided, a renamed msvcr71.dll . So if someone can show me
> the necessary manifest to make SDL use the C run-time installed by the
> Python 2.6 installer I would appreciate it. SDL is built with MinGW so I
> doubt I can distribute the run-time with it.
>
> --
> Lenard Lindstrom
> "%s@%s.%s" % ('len-l', 'telus', 'net')



From marek at xivilization.net  Tue May 13 00:32:44 2008
From: marek at xivilization.net (Marek Kubica)
Date: Tue, 13 May 2008 04:32:44 +0000 (UTC)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
Message-ID: <g0b5lc$5jm$2@worf.visyn.net>

On Tue, 29 Apr 2008 19:48:39 -0700, xahlee at gmail.com wrote:

> Python priests: go fuck yourselfs.

In case you have something useful to add, grap the documentation sources 
of Python 2.6 (they were converted from LaTeX to reST now) and send a 
patch to the documentation maintainers. Lamenting about the Python 
documentation is no help to anyone if one is not willing to improve it.

regards,
Marek


From deets at nospam.web.de  Thu May 22 05:57:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 11:57:34 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>
	<a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>
Message-ID: <69kudcF33qkecU1@mid.uni-berlin.de>

Dave Parker wrote:

> On May 21, 7:01?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>> The crucial thing is not to slow down the calculations with useless
>> bells and whistles.
> 
> Are you running your simulations on a system that does or does not
> support the "useless bell and whistle" of correct rounding?  If not,
> how do you prevent regression towards 0?
> 
> For example, one of the things that caused the PS3 to be in 3rd place
> behind the Wii and XBox 360 is that to save a cycle or two, the PS3
> cell core does not support rounding of single precision results -- it
> truncates them towards 0.  That led to horrible single-pixel errors in
> the early demos I saw, which in term helped contribute to game release
> delays, which has turned into a major disappointment for Sony.

First of all - calling the PS3 technologically behind the WII (that is on
par with the PS2 wrt to it's computational power) is preposterous.

And that put aside, I don't get why a discussion about single or double
precision floats that SHARE THE SAME ROUNDING BEHAVIOR - just in different
scales - has to do with automatically adapting calculations to higher
precision numbers such as decimals or any other arbitrary precision number
format.

Diez


From dullrich at sprynet.com  Sat May 17 10:29:33 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 17 May 2008 09:29:33 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
Message-ID: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>

On Sat, 17 May 2008 00:27:31 -0300, "Gabriel Genellina"
<gagsl-py2 at yahoo.com.ar> wrote:

>(warning: it's a rather long message)
>
>En Fri, 16 May 2008 12:58:46 -0300, David C. Ullrich  
><dullrich at sprynet.com> escribi?:
>> On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
>> <gagsl-py2 at yahoo.com.ar> wrote:
>>> En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
>>> <dullrich at sprynet.com> escribi?:
>>>
>>>> The other day I saw a thread where someone asked
>>>> about overrideable properties and nobody offered
>>>> the advice that properties are Bad. So maybe we've
>>>> got over that. I suppose properties could have
>>>> Bad consequences if a user doesn't know they exist
>>>> and think that a certain property of an object is
>>>> just an ordinary attribute. But that applies to
>>>> almost any aspect of any language.
>>>
>>> Which "bad consequences" are you thinking of?
>>
>> Didn't have anything specific in mind - there I was
>> just playing devil's advocate. I've seen a lot of people
>> here say things like "properties should only be used
>> when refactoring" without any explanation that I could
>> see of why properties were bad things. I was referring
>> to whatever problems they had in mind.
>
>I suppose those people were talking about this usage:
>
>   def getfoo(self): return self._foo
>   def setfoo(self, value): self._foo = value
>   foo = property(getfoo, setfoo)

Yeah. _If_ that's what I had in mind then telling me Python
is not Java would have been a great service. 

If I recall correctly (maybe not, haven't done any OP in
a long time) this is one of many things that OP gets righter
than Java: you can have the "read" or "write" for a property
refer to a method _or_ to an actual field; in the second
case access compiles to the same thing as in direct field
access.

>Just use a plain foo attribute instead. Almost nobody will notice the  
>difference, and it's faster, easier to maintain, easier to test, less  
>magic... But if you *do* have more to do besides handling the _foo  
>attribute, using a property is OK, at least for me. And from your other  
>comments, I can see it's fine for you too.
>
>>>> If a person comes from, say, Object Pascal (Delphi)
>>>> then properties are hard to live without. The
>>>
>>> You should read the article "Python is not Java" if you haven't done it  
>>> yet.
>>> http://dirtsimple.org/2004/12/python-is-not-java.html
>>
>> I suspect you misunderstood my point there. I actually read that
>> article years ago. Been using Python for years. I'd never confuse
>> it with OP, I promise (luckily I don't know any Java and don't
>> intend to). I really didn't express what I meant very well - what
>> I should have said was more like "If you're accustomed to properties
>> from a language like OP they seem like a very useful addition to
>> Python".
>
>Oh, sure. I missed them a lot until they became available in Python. And I  
>even wrote a fake property mixin class for Python 2.1 (horrible and slow!).
>Now I understand better what you're saying.
>
>>   window.pos = (x,y)
>>
>> seems more natural than
>>
>>   window.SetPos(x,y);
>>
>> in these cases the work involved in changing the cell
>> value or the window position is going to make the
>> extra overhead of the property interface irrelevant.
>
>Sure, that looks like a good candidate for using a property.
>
>>> But I prefer to have as little magic as possible on my objects: if it  
>>> says m.row[0] = [1,2,3] I
>>> expect m.row[0] to actually *be* that list (whenever possible), and not  
>>> any other object initialized
>>> from the [1,2,3] arguments. (Maybe this is some overreaction against  
>>> C++ "magic" constructors and such horrible things...)
>>
>> Whatever - the idea here is that m.row[0] is going to walk and quack
>> exactly like that list would, but also do other things that the liist
>> can't do, like you can add two of them.
>>
>> (When you say anobject.aproperty = 2 you also expect aproperty to
>> be 2? But if aproperty is a property that's not necessarily so - this
>> seems like as much an argument against properties in general as
>> against my version. Or perversion, if you like.)
>
>No, I don't necesarily expect it, but I try to maintain that behavior as  
>long as I can; I try to keep things simple and intuitive. This is a rather  
>used idiom:
>
>   items = foo.items = []
>   for x in someiterator:
>     if somecondition:
>       ...
>       items.append(x)
>       ...
>
>That works fine if foo.items is items - but if items were a property that  
>holds its own internal list, the code above would be broken. In that case,  
>replacing a simple attribute with a property would *not* be equivalent;  
>and I try to follow the "principle of least astonishment" and avoid such  
>situations as long as possible.

Right. Except that for the implementation I have in mind this
moring that code will work just fine. foo.items is going to be
a property of foo, so foo.items = [] will ...

Um. I just realized I have no idea what happens if
p = property(getp, setp) and later you say

(*)  avariable = x.p = avalue

I'd hope that this first calls x.setp(avalue) and then
executes avariable = s.getp(). One second please,
while we fire up the other machine...

No, it doesn't do that.

Again, this doesn't have anything to do with lists,
it seems an unfortunate astonishment regarding
properties in general. If p is an attribute then the
effect of (*) is the same as x.p=value; avariable = x.p
but if p is a property that's not so.

In the implementation I have in mind I don't see
how there's going to be any astonishment other
than astonishments that can arise with properties
in general.

Ok, that was your point - even if p is a property
you'd prefer that x.p = value store value and
possibly do other things as well, instead of
storing something other than value.

(I _have_ been astonished at how unastonishing
my Rows are, for example I was surprised to see
that

  def __add__(self, other):
    return Row([x + y for x, y in zip(self, other)])

worked as hoped if self is a Row and other is a
Row _or_ a list.)

Anyway, my m.rows[j] can't be a list, because
I want to be able to say things like
m.rows[0] += c*m.rows[2]. Allowing 
m.rows[j] = [1,2,3] seems convenient, while
requiring m.rows[j] = Row([1,2,3]) fixes
this problem. Hmm.

>(I think that in OP the equivalent of m.row[0] = [1,2,3] isn't very usual  
>- mostly because there isn't a list literal, I presume)
>
>> _A_ workaround would be to simply not have indexedproperties
>> be class attributes, instead saying self.whatever =
>> indexedproprty(whatever) in __init__.
>
>Unfortunately that doesn't work. 

As I found when I tried it. Then I read the docs again a little
more closely...

>Properties get their "magic" when  
>searched in the class namespace - a property set as an instance attribute  
>doesn't behave as a property at all, it's just an attribute as any other.
>
>>> class Matrix2x2(object):
>>>   def __init__(self):
>>>     self.cells = [[0,0], [0,0]]
>>>
>>>   def __setitem__(self, (row, col), value):
>>>     self.cells[row][col] = value
>>>
>>>   def __getitem__(self, (row, col)):
>>>     return self.cells[row][col]
>>>
>>> class AClass(object):
>>>   def __init__(self):
>>>     self.cell = Matrix2x2()
>>
>> Well, something like this is where I was before coming up with
>> the indexedproperty thing. Unless I'm missing something, which
>> has happened before, what you write above can't work, because
>> self.cell has to know what Matrix2x2 created it so it knows
>> what AClass instance to modify when it's modified. (No, we
>> can't just leave the state information in self.cells; think of the
>> case of a Matrix with a row[] property and also a col[]
>> property - they have to be modifying the data stored in
>> the owning matrix.)
>
>The above class works fine in the simple cases I tested it - including the  
>bug involving two AClass instances. Adding "row" and "col" views is rather  
>simple:
>
>class AClass(object):
>   def __init__(self):
>     self.cell = Matrix2x2()
>     self.row = ViewAsRow(self.cell)
>     self.col = ViewAsCol(self.cell)
>
>class ViewAsRow(object):
>   def __init__(self, matrix):
>     self.cells = matrix.cells
>
>   def __getitem__(self, index):
>     return self.cells[index][:]
>
>   def __setitem__(self, index, row):
>     self.cells[index][:] = row
>
>class ViewAsCol(object):
>   def __init__(self, matrix):
>     self.cells = matrix.cells
>
>   def __getitem__(self, index):
>     return [row[index] for row in self.cells]
>
>   def __setitem__(self, index, col):
>     for row, value in zip(self.cells, col):
>       row[index] = value
>
>There is no need for the ViewAsCol nor ViewAsRow classes to know they're  
>being used inside an AClass instance. 

Well, no. But they do need to preserve that reference to that
Matrix2x2 object.

>(A better design would avoid to use  
>matrix.cells - but I was constrained by the original Matrix2x2 design that  
>I didn't want to modify.)
>
>> (again, it doesn't have to be like that in this case,
>> but it does in the case where various "properties"
>> like cells are giving different sorts of access to the
>> same data, which data then has to be stored in AClass.)
>
>But you may have many references to the *same* data and view it in  
>different ways - you don't have to walk thru the intermediate AClass  
>"container" because AClass doesn't "store" data; the data is "stored" in  
>the list itself, AClass instances only contain the name "cell" bound to  
>the Matrix2x2 object.

Well of course. My point was just that it had to be somewhat
more complicated than the original code you gave if we wanted
to have two views of the same data. 

>In OP terms, all objects in Python act like those inheriting from TObject,  
>not like basic types (numbers, char, string...). An important difference  
>is that Python takes care of automatic object deletion when they're no  
>longer used, but in OP you have to manage the object's lifetime yourself.  
>So in OP it is important *who* owns some object; and sharing a TList  
>instance -by example- isn't so frequent because when the list is freed all  
>its references become invalid (so one needs some kind of notification...)
>In Python, on the other side, many objects may have a reference to the  
>same other one, like the Matrix above - it won't disappear until nobody  
>else references it. This sharing behavior may be a Good Thing or a Bad  
>Thing, depending on the circumstances. By example, the ViewAsRow class  
>above *could* return an actual list from the Matrix2x2 instance, but I  
>choose not to, to emphasize that it's a *view* of the underlying data  
>(else, modifications to the returned list would alter the data itself).
>
>> And then that's the point to the indexedproperty;
>> the code passing data back and forth doesn't need
>> to be rewritten with each property, it's all done
>> inside the implementation of the indexedproperty
>> class. I realized that I could just use object attributes
>> instead, but it seems to me that indexedproperty
>> encapsulates the data-passing protcol once and for
>> all instead of requiring it to be redone each time.
>
>I don't understand what you call "data-passing protocol"; as far as I can  
>tell, there is no data-passing, only names refering to the same and unique  
>object instance.

I didn't say what I meant very well. Your ViewAsRow does require
a reference to data held elsewhere; that reference has to be passed
in the constructor and used in __get/setitem__.

I think what I should do is set something up like your thing
above (except that in fact there's no reason for AClass,
it's actually Matrix I care about, AClass just crept into the
discussion because it was in the trivial example in the original),
modified so it stores a list of Row objects instead of a list of
lists.

Then concoct an indexedattribute class (ignoring descriptors) 
that lets me say

class Matrix2x2(object)
  def __init__(self, data):
     ...
     self.rows = indexedattribute(self.getrow, self.setrow)
     self.cols = indexedattribute(self.getcol, self.setcol)

  def getrow(self, index)
    ...

and then compare the two. I suspect that the second
Matrx2x2 is going to be simpler because of things
handled automatically by the indexedattribute class
(counting the code in that class as part of the 
"complexity" doesn't count, since I only write that
class once and get to use it for my matrices and
also my wxGrids...)

Don't hold your breath, I have other things to do
in the next few days. Thanks again for pointing
out the bug in the original. (It might never have
come up - I don't see why I'd use a cell in one
matrix as an index to another matrix. But regardless
it makes the original totally unacceptable, and
if it _did_ come up when I was using it it would
have taken me some time to figure out what the
problem was...)
David C. Ullrich


From corvettecraz92 at gmail.com  Sat May 31 14:44:14 2008
From: corvettecraz92 at gmail.com (corvettecraz92 at gmail.com)
Date: Sat, 31 May 2008 11:44:14 -0700 (PDT)
Subject: Question about files?
Message-ID: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>

I want to create a program where a user can type what ever they want
to, have it saved to a file, and the be able to re-open it and read
it. How would I do this? Thanks!


From grante at visi.com  Mon May 12 13:50:35 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 12:50:35 -0500
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> <48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
	<c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>
Message-ID: <1emdnZPhZ6L2HrXVnZ2dnUVZ_j2dnZ2d@posted.visi>

On 2008-05-12, Paul Hankin <paul.hankin at gmail.com> wrote:

> for i in xrange(1, 101):
>     print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

Doh!  It never occured to me that 'string' * 0 == ''.

-- 
Grant Edwards                   grante             Yow! An air of FRENCH FRIES
                                  at               permeates my nostrils!!
                               visi.com            


From ohad911 at gmail.com  Sat May 24 07:57:37 2008
From: ohad911 at gmail.com (ohad frand)
Date: Sat, 24 May 2008 14:57:37 +0300
Subject: problem with import / namespace
In-Reply-To: <483474E8.8090708@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
	<483474E8.8090708@shopzeus.com>
Message-ID: <b0d9688e0805240457r77716c56y94e9b71bf8de5ed9@mail.gmail.com>

Hi Laszlo

Thanks for your reply but it stil didnt work:
i opened python shell, changed active directory to \\one and imported tmp1.
now the correct file is loaded.
now i deleted tmp1
i dir os.chdir(\\two) and imported tmp1 again. now the incorrect file is
loaded (the same one as before).
i did one more trial with sys.path insted of os.chdir() and it didnt work
either (sys.path.append(\\one), import tmp1, del tmp1, sys.path.remove(\\one),
sys.path.append(\\two), import tmp1)
can you please try to do so and see for yourself that something is wrong
here.

The reason why i am not using other names is because i am triyng to build
something that will execute external sw and for that i have no control of
the names of the modules, but this is not important, because python must
give us a way to clear previously imported module

Thanks again
Ohad


On 5/21/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>
> ohad frand wrote
>
>> Hi
>> Thanks for the answer.
>> I probably didnt write the problem accurately but it is not as you
>> described.
>> (i already read before the section that you pointed and it didnt help me)
>> the problem is that i dont want to import a file from different directory
>> but only from the same directory.
>> \\1\tmp2.py imports \\1\tmp1.py
>> \\2\tmp2.py imports \\2\tmp2.py
>> but when i execute the following script in the interpreter i get that the
>> second tmp2.py file imports not the file from the same directory but the
>> file that was already imported by the first executed tmp2.py file.
>>
> I think that using absolute names DOES solve the problem.
>
> import two.tmp2  # This will import tmp2.py in "two" folder for sure!
>
> >>> execfile("tmp2.py") <- here the executaion is OK
>> >>> os.chdir("c:\\2")
>> >>> execfile("tmp2.py") <- here the execution is not ok because tmp2.py
>> file imports the tmp1.py file from c:\\1 which is not OK
>>
> Hmm looks like your tmp2.py file is not a module but a whole program. No
> wonder I could not understand you - I thought that "tmp2.py" is a module,
> not a program.
>
> The answer in this case: if tmp2.py is a program then you should either
> manipulate sys.path or chdir to the containing dir, as I told in my former
> post. ( os.split(os.abspath(__file...))) -> then chdir or
> sys.path.insert(0,mydir) )
>
> in between those two execfile commands i tried to do a lot of things but
>> every time python imported the incorrect file for the second execution. (i
>> am not building a package and those names are just examples for the problem,
>> i am not really using 1 and 2 names as dirs)
>>
> Why do you need execfile?
>
>  Laszlo
>
>
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From saikia at unspokenmind.net  Thu May  8 12:07:43 2008
From: saikia at unspokenmind.net (Amitabh Saikia)
Date: Thu, 8 May 2008 09:07:43 -0700
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>

write a bash script(to run your program at intervals) and run the bash
script with nohup

- saikia at unspokenmind.net

On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:

> I was wondering if you know how can I run a python code once every five
> minutes for a period of time either using python or some other program like
> a bash script.
>
> I have asked this question before and some of you answered me but I still
> have problem. Most of the answers was to use cron and crontab which works on
> my computer but not if I want to do it on department's computer since I do
> not have permission to change those files. Is there any other way which does
> not need administrator permission?
>
> Thanks  a lot,
>
> Maryam
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ohad.frand at percello.com  Tue May 13 03:11:57 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Tue, 13 May 2008 10:11:57 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>

Hi Gary

Sorry that I was not clear, I hope that this time I will explain myself
better.

I can get list of all builtin functions in python by dir(__builtins__).
This return a list of string with most known names to python language
such as: 
[... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow', 'property',
'quit', 'range', 'raw_input', 'reduce', 'reload'...]

But I don't know how to generate the next list of builtin python
statements:
['assert','break','class','continue','def','del','elif','else','except',
'exec','finally','for','from','global',
'if','import','pass','print','raise','return','try','while','yield']

Thanks,
Ohad Frand

-----Original Message-----
From: Gary Herron [mailto:gherron at islandtraining.com] 
Sent: Monday, May 12, 2008 10:41 PM
To: Ohad Frand
Cc: python-list at python.org
Subject: Re: question about python statements

Ohad Frand wrote:
>
> Hi
>
> I am looking for a way to programmically get a list of all python 
> existing statements that I cannot access by __builtins__ or locals()
>
> (like ["assert","break","class",...])
>
> Thanks,
>
> Ohad
>
>
------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
Sorry, I've no idea what you mean here. Perhaps you could help us by 
defining what you mean by
"statements that I cannot access by __builtins__ or locals()"

Is there any statement that you *can* access in such a way?

What does it even mean to "access a statement"?

Do you even have a list of "statements" from which we are to work? 
Python is a little unusual in what it considers statements.

Gary Herron






From sturlamolden at yahoo.no  Thu May 22 19:01:14 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 22 May 2008 16:01:14 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
Message-ID: <2b32a589-5e72-407a-aa7b-f98d1156c70b@s50g2000hsb.googlegroups.com>

On May 23, 12:33 am, gianluca <geonom... at gmail.com> wrote:
> Hy,
> I need help about use dll with ctypes. I've compiled my dll C library
> and I copied it in c:\windows\system32. When I load it with
> "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> python don't see the dll function. with dir(myDLL) I've only this:
> ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> '_name']

I see nothing wrong here.








From johnjsal at NOSPAMgmail.com  Tue May 20 13:25:07 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:25:07 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<4832dbd0$0$23017$426a74cc@news.free.fr>
Message-ID: <027e0c78$0$26938$c3e8da3@news.astraweb.com>

"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4832dbd0$0$23017$426a74cc at news.free.fr...

>> def compress(s):
>>     new = []
>>     [new.append(c) for c in s if c not in new]
>>     return ''.join(new)
>
> As far as I'm concerned (and I'm a big fan of list-comps, generator 
> expressions etc), this is definitively an abuse. And a waste of resources 
> since it builds  a useless list of 'None'.

I agree with you. After being proud of myself for about 20 seconds, it 
suddenly seemed like an abuse rather than a clever way to do it in one line. 
:) It just looked wrong to have a list comp. without an assignment, etc.

Actually, though, I wasn't so much thinking of the waste of resources as I 
was that what was happening didn't seem to be explicit or evident enough. So 
despite the fact that the for loop with the nested if is the exact same 
code, it just seems more appropriate. 




From Ludwig at armand-miniatur.de  Tue May 20 14:52:30 2008
From: Ludwig at armand-miniatur.de (Ludwig Miniatur)
Date: Tue, 20 May 2008 11:52:30 -0700 (PDT)
Subject: What's wrong with that comment?
Message-ID: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>

Hi, I ran into a funny thing when I played with the python parser, to
build a python call graph for learning...

When I have a (special) python program, that runs without any error it
gives an error, when I try to parse it parser.suite. The error is,
when my program has a comment on the last line after an indented
block. Note that there no newline behind "# comment". With a newline
everything is fine.

For example:
#!/usr/bin/env python

from parser import suite, ast2list
fh = file(__file__)
s = fh.read()
fh.close()
ast = suite(s)

while False:
  print "hello world"
# comment

Looks like a little bug in parser; but what I don't understand is that
I thought parser was build with the current syntax of python.

So, why can python run the script (an it can if you comment out the
line "ast = suite(s)") but parser can't?

Looking forward for answers...

Ludwig


From george.f.rice at gmail.com  Sun May 11 07:48:01 2008
From: george.f.rice at gmail.com (george.f.rice at gmail.com)
Date: Sun, 11 May 2008 04:48:01 -0700 (PDT)
Subject: Some error messages in Python are ugly
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <79906098-5b9b-48f3-a5fe-19ab73b011e7@e39g2000hsf.googlegroups.com>

On May 11, 3:10 am, wxPytho... at gmail.com wrote:
> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?

I suspect you were running the python command line in a Linux shell
such as bash, and pressed Control-Z.

The message you list above is NOT an error message from Python, but
rather an informational message from the Linux shell. The short answer
is to type "fg" and press Enter twice, and Python will resume
executing.

Here's the long answer.

This message from the Linux shell is telling you that the python
process (application) has been stopped, and is no longer executing.
"[1]" tells you the job number; Linux supports  multiple stopped jobs,
and gives each a number to make it easy for you to give them
commands.  "+" tells you that this is the "active job"; it's at the
top of the queue, and is the job that will respond to your job-related
commands by default (i.e., if you don't supply a job number).

You can list all jobs in the queue by typing "jobs" at the Linux shell
prompt. You can begin running the "active job" again by typing fg
(which means "foreground"); you could also switch the "active job" to
running in the background by typing bg, although that wouldn't be
useful with the Python shell.

You can learn more about managing jobs from the Python shell here:
http://www.slackbasics.org/html/chap-procmgmt.html

Great question!




From wuwei23 at gmail.com  Thu May 22 04:37:43 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 01:37:43 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
Message-ID: <b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>

On May 22, 6:15 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> Because when you expect exception to occur on something like 0.01% of
> cases, and you have 4 or 5 exceptions and the code to test for each
> conditions that cause exceptions is quite long and burried deep inside
> some other code it's much better to do it this way ;). Too bad there's no
> syntactic sugar for doing this kind of try-except loop.

I'm surprised your unit tests let it get to such a state... ;)

How about something like this?

    retry, total_fail = False, False
    try:
        some_function()
    except SomeException:
        some_function2()
        some_function3()
        retry = True
    finally:
        if retry:
            try:
                some_function()
            except SomeException:
                total_fail = True

Using 'finally' seems more explicit about it being part of the
exception handling than using a loop construct.

Actually, this is even more direct:

    try:
        some_function()
    except SomeException:
        some_function2()
        some_function3()
        try:
            some_function()
        except SomeException:
            raise SomeError


From venkat83 at gmail.com  Thu May 15 23:39:06 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Thu, 15 May 2008 20:39:06 -0700 (PDT)
Subject: managing properties/configurations
Message-ID: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>

Hi,

Am sure many would have stumbled on this situation while developing an
application in Python which is highly driven by configuration/
properties.

I have an application (obviously written in Python) wherein the
properties change frequently and the program needs to work according
to the new rules. Since , python is scripting language the idea of a
Properties file(analogous to Java) doesnt make sense to me. However,
at the same time i am looking for some mechanism by which the hot-
patches(i.e, properties can be changed) can be applied easily.

Since the patches(mostly properties change) will be mostly be done by
non-programmers, i do not want them to touch the Py codes,but at the
same time alter the behaviour suitably.(Kindly avoid the advice to
teach Python to the non-programmers :D ).

The following is a *very simple example* of the case wherein the
properties(namely 10,30,31,40) are 'hardcoded' - i want this to be
'away' from the code.

def checkCutoff(self,up,down):
       .............do some processing........
       if (10 <= score <= 30):
       		result="Bad"
       elif (31 <= score <= 40):
       		result="Good"
       .............do some processing........
       return result

If i have to have this as a separate script that stores all the
properties, then how do I make the program fetch the new values
without restarting.

Also, i would be interested in providing a GUI for manging the
properties so that the changes can be applied even more easily - but
at any time i do not want to bring down the program and then
restart(all are hot patches).

Regards,
Venkat


From krumblebunk at gmail.com  Tue May  6 09:37:00 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 06:37:00 -0700 (PDT)
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
	<slrng20mun.1cu.hat@se-162.se.wtb.tue.nl>
Message-ID: <9a836897-7454-4ddf-b93f-da7b34955389@q27g2000prf.googlegroups.com>

On May 6, 2:23 pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:

....

> Without a explicit Python value of what comes out of the sql query, I can only
> guess. As example, assume the following data:
>
> f = { 1: ['Hostname', 'blabla', 'person', 'john'],
>       2: ['MachineName', 'blabla', 'company', 'something']}
>
> ie a dictionary of column number to rows.
>
> Here you are only interested in the value part, and the code becomes.
>
> for v in f.itervalues():
>   if v[0].startswith('Hostname'):
>      print v[3]

Many thanks for all your replies - this last snippet of code helped
me, extra thanks!

kb.


From ptmcg at austin.rr.com  Sat May 24 09:58:38 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:58:38 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <d47e9c74-d1c1-4305-86e2-1334ab886e4e@d77g2000hsb.googlegroups.com>

On May 24, 6:12?am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Carl Banks schrieb:
>
> > p = myfunction()
> > if p:
> > ? ? print p
>
> > (I recommend doing it this way in C, too.)
>
> This is okay for if-clauses, but sucks for while-loops:
>
> while (fgets(buf, sizeof(buf), f)) {
> ? ? ? ? printf("%s\n", buf);
>
> }
>
> is much shorter than
>
> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> ? ? ? ? printf("%s\n", buf);
> ? ? ? ? tmp = fgets(buf, sizeof(buf), f);
>
> }
> > For the case where you want to do this in an elif-clause, look for the
> > recent thread "C-like assignment expression?" which list some
> > workarounds. ?Or just Google this newsgroup for "assignment
> > expression". ?It's one of few minor irritating things in Python
> > syntax.
>
> Alright, I will. Thanks.
>
> Regards,
> Johannes
>
> --
> "Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
> reicht zu wissen, da? andere es besser k?nnen und andere es auch
> besser machen um einen Vergleich zu bringen." ? ? - ? ? Wolfgang Gerber
> ? ? ? ?in de.sci.electronics <47fa8447$0$11545$9b622... at news.freenet.de>

I posted this to the other thread, but I'm afraid it might get buried
over there.  See if this works for you.

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return self

    def __bool__(self):
        return bool(self.value)
    __nonzero__ = __bool__


import re

tv = TestValue()
integer = re.compile(r"[-+]?\d+")
real = re.compile(r"[-+]?\d*\.\d+")
word = re.compile(r"\w+")

for inputValue in ("123 abc -3.1".split()):
    if (tv << real.match(inputValue)):
        print "Real", float(tv.value.group())
    elif (tv << integer.match(inputValue)):
        print "Integer", int(tv.value.group())
    elif (tv << word.match(inputValue)):
        print "Word", tv.value.group()

Prints:

Integer 123
Word abc
Real -3.1

In your examples, this could look like:

tv = TestValue()
while (tv << fgets(buf, sizeof(buf), f)) {
         printf("%s\n", tv.value);

or:

if (tv << myfunction()):


What do you think?  Is '<<' close enough to '=' for you?

-- Paul


From Dominique.Holzwarth at ch.delarue.com  Thu May 29 05:29:00 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Thu, 29 May 2008 10:29:00 +0100
Subject: Easy install / setuptools
Message-ID: <5213E58D85BC414998FA553C701E386C0EF286455F@SGBD012511.dlrmail.ad.delarue.com>

Hi everyone

I'm trying to figure out the "best" way to distribute my own python packages. Basicly, what I want is to have something like an "installer.exe" (on windows) which puts my package under Python/Lib/site-packages (so that it can be found via the PYTHONPATH).

I've played around a bit with "easy install" and "setuptools" and the .egg format. I've already managed to create a "myPackage.egg" file with setup tools and "install" (it's just a copying) it ito the site-packages directory using "easy install".

What I was wondering now is if there's a way to actually EXTRACT the egg file and put the extracted file (i.e. the .py file) under site-packages. And not the .egg?

The problem with egg files is that you can't use "open(os.path.join(os.path.dirname(__file__),'myFile')" and I'd need to rewrite such code which I'd like to avoid if possible. Also, I don't know whether leaving the python scripts packed inside the egg file is slower for execution or not...

Would be cool if someone could give me some inputs on how to distribute python packages in an easy and effective way :-)

Thx in advance
Dominique


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From marco at sferacarta.com  Thu May  8 10:46:24 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 16:46:24 +0200
Subject: source beautifier
Message-ID: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>


Is there a program (free, payware, whatever) like polystyle for 
linux/python?

http://www.polystyle.com/features/python-beautifier.jsp

I've never used it, but the example is quite clear.
I just need it for python -- but it should not force me to use PEP8.



From saluk64007 at gmail.com  Thu May  1 13:44:13 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Thu, 1 May 2008 10:44:13 -0700
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <fvcuo9$31i9$2@news.mtu.ru>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
Message-ID: <c3f69bf60805011044o5bfbcd81pd6d8d6766a5c820a@mail.gmail.com>

YAML is a joke if you expect a windows user to be able to hand edit the
data.  Windows users typically expect a .ini file in the application's
directory.  (Usually not the users home directory, even if that may be a
better location).  XML is ok, but .ini is much preferred.

If you have a configuration gui or whatever and the file doesn't need to be
hand edited, it doesn't really matter what format you store it in.  Sqlite
db would be fine in this case.  Still keep the file as a ".yourappname" file
in users home linux directory, and probably do as mentioned above and keep
it in their windows home directory.
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From deets at nospam.web.de  Tue May 13 12:38:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:38:32 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <68tuhfF2unducU1@mid.uni-berlin.de>

> True.  But in Python, you don't see statically-linked pure-syscall CGI
> scripts being cross-compiled under Windows for ftp'ing up to a Linux
> server.  And you don't see the speed of pure assembly language
> libraries.  And I'll be willing to bet that Flaming Thunder will have
> OO features similar to Python before Python has the features that
> Flaming Thunder already does.

Your bets don't count anything here. These things don't exist, so don't brag
on them being superior.

> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year.  But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

Quite a revealing statement I'd say. And unless you don't show any
real-world site running on FT that needs things like sessions, cookies,
database-connectivity, unicode and a ton more of stuff FT doesn't support
out-of-the-box or through 3rd-party-libs, I wouldn't mention "the people"
as well. So far, *all* that you've been showing on your site regarding CGI
are toy-scripts. Nothing more.

>> And what is really expensive is brain-cycles, not cpu-cycles.
> 
> Depends on whether you're the programmer, or the customer.  I've found
> that customers prefer products that are 5 to 10 times faster, instead
> of products that were easy for the developer.

This shows how much you don't know about customers, and their needs. A
customer gives a s**t about 5-10 times faster sites. They care if it is
*fast enough*, but beyond that they don't bother. But what *always* bothers
them is development time & flexibility. Because that directly affects the
price they pay.

And if a average man-day costs $600 (which is not expensive), and the
project is of average size of a couple of man-months - well, you care about
mathematics, do the math yourself what that means that FT lacks anything
but a simple CGI-interface. 

> And I disagree that Flaming Thunder requires more brain-cycles.
> Because it's based on leveraging existing English and math fluency
> (which was one of the original goals of Python, was it not?), I think
> that Flaming Thunder requires fewer brain-cycles because fewer brains
> cells have to be devoted to memorizing language peculiarities.

It does require more, because it lacks all the libs and 3rdparty-libs. And
because it lacks features such as OO and other stuff, it will be harder to
write these as well as use them.

Show me how to beat a quickstarted TurboGears/Django webproject. *Then* you
can talk business here.

> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
> 
>   Write 10^2.
> 
> but can't understand why another programming language gives the answer
> 8 (Python):
> 
>   Print 10^2
> 
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Who has conducted the research that supports that statement? And since when
is ^ the better operator for "to the power of" that **? Because latex uses
it? I need to see the elementary school students who use that...

Even *if* that would be true, how does a perceived advantage in one field FT
was explicitly created for show that it is the generally better one and
understandable one for more diverse applications?


Diez



From bronger at physik.rwth-aachen.de  Fri May  2 00:53:18 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 06:53:18 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru> <874p9hvce5.fsf@physik.rwth-aachen.de>
	<fvdmp8$3ep$3@news.mtu.ru>
Message-ID: <87zlr9tigx.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> On Fri, 02 May 2008 01:21:38 +0200, Torsten Bronger wrote:
>
>> [...]
>> 
>> In contrast to many other areas of software, configuration files
>> needn't be compatible with anything except the user's brain.  So
>> even if the rest of the world uses config format X, you can
>> safely stick with config format Y.
>
> There are several reasons for compatibility:
>
> 1. The user or another developer might want to write GUI front-end
> to configure your app. With standard format this would be easier.

The libraries are there after all -- I don't speak about an own
format.

> [...]
>
> 3. Bigger applications that include your sofware as one of its
> components may need to automate configuration process and update
> several config files of different smaller apps from one global
> setting.

If you do something complex like this, porting an application to
another config format is the smallest problem.  Or in other words:
This is not something I'd optimise config handling for.

> That's precisely why first XML and now YAML became popular for
> config files.

I can't speak for YAML, but XML was not used for the config files I
have in mind, but as a machine-readable serialisation format for
apps settings that you can set in the app itself.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From nick at craig-wood.com  Fri May  2 07:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 02 May 2008 06:30:03 -0500
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
	<8763tx1j5o.fsf@benfinney.id.au>
	<ml9u5tx2w10i.ym9gmtkot622$.dlg@40tude.net>
Message-ID: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>

Brendan Miller <catphive at catphive.net> wrote:
>  On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:
> 
> > URL:http://docs.python.org/lib/module-subprocess.html
> 
>  Awesome. This is exactly what I was hoping existed.

subprocess works well for spawn process, send input, receive output,
read exit code type jobs.

For jobs which require interactivity ie send input, receive output,
send input, receive output, ... it doesn't work well.  There isn't a
good cross platform solution for this yet.  pyexpect works well under
unix and is hopefully being ported to windows soon.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From nc at iname.com  Sun May 25 19:23:12 2008
From: nc at iname.com (NC)
Date: Sun, 25 May 2008 16:23:12 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com> 
	<g1cjnb$1p57$1@news.mtu.ru>
Message-ID: <da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>

On May 25, 1:55 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
>
> > A quick look at the revision log:
>
> > http://byteflow.su/log/
>
> > reveals that the initial commit of 60 or so files has been done
> > on 08/14/07 (10 months ago), a second developer came on board
> > 12/01/07 (seven+ months ago), a third one, on 01/04/08 (six+
> > months ago), a fourth one, on 01/16/08 (also six+ months ago).
> > There are at least nine discernible contributors overall.  Say
> > what you will, but it still looks an awful lot like like two
> > man-years, Django or no Django...
>
> I bet that if they did this with PHP framework they where far
> from where they are now.

The question is, which way?  :)  Jerry Stuckle, with whom I
wholeheartedly argue about half the time we post to the same threads
and argue bitterly the other half of the time, thinks they would be
ahead of where they are now...  :)

> I didn't say that it's not possible to write good code in PHP,

Indeed you didn't.  You did, however, say that development in Python/
Django is inherently faster than development in PHP (your exact words
were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
50-fold difference).  This claim has just been obliterated using the
example you (not I) provided; my estimate of two man-years for
developing WordPress turns out to be fairly close to what has actually
gone into the development of Byteflow.  In other words, so far we have
discovered no evidence of Python's (or PHP's, to be fair) superiority
in terms of developer's productivity.

> IMHO Python language is better designed

That is indeed a matter of opinion.  You like (among other things)
immutable strings, the off-side rule, the idea that everything is an
object, and the fine distinction between mutable lists and immutable
tuples, and I have no problem with you liking these features, as long
as you agree that other people may have reasons to like the
alternatives better.

> Yes, it's possible to write something clean in PHP but it
> would require a lot more work.

In my opinion, it wouldn't, and in my experience, it doesn't.  All you
need is to actually put a designer in charge of design.  Additionally,
there are situations (rapid prototyping, for example) when
maintainability (the requirement behind the "clean code") is simply
not a concern.

Cheers,
NC


From dullrich at sprynet.com  Fri May 30 10:57:25 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:57:25 -0500
Subject: A video introducing Ulipad, an IDE mainly for Python
References: <mailman.1689.1211986714.12834.python-list@python.org>
Message-ID: <dullrich-0FBD1D.09572530052008@text.giganews.com>

In article <mailman.1689.1211986714.12834.python-list at python.org>,
 Dick Moores <rdm at rcblue.com> wrote:

> I've been using Ulipad, a free IDE mainly for Python, and written in 
> wxPython, for a couple of years, and think it's terrific. Now another 
> user, Kelie Feng, has made an 8-minute video showing it off. The 
> visual clarity of the video is remarkable. You can download it 
> (Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may 
> be necessary for your player, from <http://www.rcblue.com/u3/>.

I skipped the video and tried Ulipad. Looks very interesting.

The documentation I got is mostly in Chinese. Is there an
English version somewhere?

> Dick Moores

-- 
David C. Ullrich


From petr.poupa at gmail.com  Mon May 12 14:16:08 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 11:16:08 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.990.1210612612.12834.python-list@python.org>
Message-ID: <ef31cd3f-21ce-4dd0-b38e-e888d2c14ac6@z72g2000hsb.googlegroups.com>

On 12 Kv?, 19:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 09:19:48 -0700 (PDT), petr.po... at gmail.com wrote:
>
> > [snip]
>
> >> >Where is the mistake? I dont know.
>
> >> You cannot reconnect a socket.  You need to create a new one for each
> >> connection.  It's also almost certainly the case that the way you are
> >> receiving data is incorrect.  There is no guarantee that you will get
> >> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
> >> the bytes written to the socket by the peer will be returned by such
> >> a call.  Instead, you need a framing protocol to determine when all
> >> data has been received.  For example, you might length prefix the
> >> data, or you might insert a delimiter (or a terminator) at the end.  Or
> >> if there is exactly one message to receive, then you should just read
> >> until the recv call returns '', indicating EOF.
>
> >> Jean-Paul
>
> >ok thanks, but I am true greenhorn, so you think that the best way is
> >write new script?
> >Could you send me code if it isnt long, becase I have no idea and
> >unfortunately time as well.
>
> I'm not sure what you want to happen, so I can't write it for you.  I
> suggest you start with Twisted instead of the socket module, though,
> as Twisted provides a higher-level interface to network programming.
>
> You can find some introductory documentation about writing clients here:
>
>  http://twistedmatrix.com/projects/core/documentation/howto/clients.html
>
> Jean-Paul


My script send me via 3883 port (VRPN) data, but only once. I need
listening this port countinously.
So I need  make some loop to print data from 3883 port permanent.
Data that I recevied looks liek this:

receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'

Do you think its necessary to use Twisted? Do you have any ideas how
to do it with socket modul?

thanks for reply


From pavlovevidence at gmail.com  Fri May  2 12:47:56 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 2 May 2008 09:47:56 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<mailman.463.1209745852.12834.python-list@python.org>
Message-ID: <747a2d26-b49d-4d9e-bf41-881d57bc0114@b1g2000hsg.googlegroups.com>

On May 2, 12:30 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 01 May 2008 10:30:03 -0300, Nick Craig-Wood <n... at craig-wood.com>
> escribi?:
>
> > As for where to store it, I use os.path.expanduser("~") to find the
> > base directory and a bit of platform specific code.
>
> > Something like this snippet
>
> >     self.is_windows = sys.platform == 'win32'
> >     self.home = os.path.expanduser("~")
> >     if self.is_windows:
> >         self.config_dir = os.path.join(self.home, "Application Data",
> > self.NAME)
> >     else:
> >         self.config_dir = os.path.join(self.home, "."+self.NAME)
> >     if not os.path.isdir(self.config_dir):
> >         os.makedirs(self.config_dir, mode=0700)
> >     self.config_file = os.path.join(self.config_dir, "config")
>
> Please don't do that if you distribute your programs. "Application Data"
> is a localized name, like "Program Files" and all special folders. On my
> Spanish version of Windows, they're "Datos de programa" y "Archivos de
> Programa" respectively, and the user may choose to move them to another
> location.
> Use SHGetFolderPath to obtain the path; see  http://msdn.microsoft.com/en-us/library/bb762181(VS.85).aspx

Thanks for the heads up: wasn't aware those guys were localized.

(Though I wonder why they bothered: Microsoft gives typical users a
guilt trip for putting their own files anywhere other than My
Documents, or Mis Documentos, or whatever.)


Carl Banks


From kyosohma at gmail.com  Thu May  1 16:38:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 13:38:43 -0700 (PDT)
Subject: send gpg encrypted emails (properly mime formatted)
References: <mailman.426.1209664674.12834.python-list@python.org>
Message-ID: <960c5175-e89d-4fec-82d1-57f6073797fb@a70g2000hsh.googlegroups.com>

On May 1, 12:57?pm, Neal Becker <ndbeck... at gmail.com> wrote:
> Any ideas on python packages that could help with sending gpg encrypted
> (properly mime formatted) emails?
>
> My idea is to forward all my emails to a remote imap server, but gpg encrypt
> them to myself in the process.

Take a look at this for the gpg part:

http://wiki.python.org/moin/GnuPrivacyGuard

And the standard library has the email module which does mime
formatting.

Mike


From n00m at narod.ru  Thu May  1 03:35:17 2008
From: n00m at narod.ru (n00m)
Date: Thu, 1 May 2008 00:35:17 -0700 (PDT)
Subject: A bug in difflib module? (find_longest_match)
Message-ID: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>

from random import randint

s1 = ''
s2 = ''

for i in xrange(1000):
    s1 += chr(randint(97,122))
    s2 += chr(randint(97,122))

print s1[:25]
print s2[:25]

import difflib

s = difflib.SequenceMatcher(None, s1, s2)

print s.find_longest_match(0, len(s1), 0, len(s2))



>>> ============== RESTART ====================
>>>
yymgzldocfaafcborxbpqyade
urvwtnkwfmcduybjqmrleflqx
(0, 0, 0)
>>>

I think it's line #314 in difflib "who's to blame" --


From wuwei23 at gmail.com  Fri May 23 21:40:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 18:40:15 -0700 (PDT)
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <1c55346f-7fe2-488b-936c-e1dadb1c0c05@g16g2000pri.googlegroups.com>

On May 24, 6:36 am, davidj411 <davidj... at gmail.com> wrote:
> but when i try to iterate through it again, it appears to print
> nothing (no error either). the file is exhausted?

No, the iterator is finished. Iterators are generally use-once:

"The intention of the protocol is that once an iterator's next()
method raises StopIteration, it will continue to do so on subsequent
calls. Implementations that do not obey this property are deemed
broken." [http://docs.python.org/lib/typeiter.html]

As well as reading the iterator into a list, you can also create a
copy of the iterator:

>>> import itertools
>>> reader1, reader2 = itertools.tee(csv.reader(open('export.csv')))

Two copies is the default, but you can optionally specify as many as
you like:

>>> m, n, o = itertools.tee(iterator, 3)

- alex23






From szhorvat at gmail.com  Sat May  3 14:44:19 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Sat, 03 May 2008 20:44:19 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <m2zlr7l20r.fsf@googlemail.com>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
Message-ID: <481CB283.107@gmail.com>

Arnaud Delobelle wrote:
> 
> sum() works for any sequence of objects with an __add__ method, not
> just floats!  Your algorithm is specific to floats.

This occurred to me also, but then I tried

sum(['abc', 'efg'], '')

and it did not work.  Or is this just a special exception to prevent the 
  misuse of sum to join strings?  (As I said, I'm only an occasional user.)

Generally, sum() seems to be most useful for numeric types (i.e. those 
that form a group with respect to __add__ and __neg__/__sub__), which 
may be either exact (e.g. integers) or inexact (e.g. floating point 
types).  For exact types it does not make sense to use compensated 
summation (though it wouldn't give an incorrect answer, either), and 
sum() cannot decide whether a user-defined type is exact or inexact.

But I guess that it would still be possible to make sum() use 
compensated summation for built-in floating point types (float/complex).

Or, to go further, provide a switch to choose between the two methods, 
and make use compensated summation for float/complex by default.  (But 
perhaps people would consider this last alternative a bit too messy.)

(Just some thoughts ...)


From darcy at druid.net  Mon May 19 12:48:31 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Mon, 19 May 2008 12:48:31 -0400
Subject: PyGreSQL installation
In-Reply-To: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>
References: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>
Message-ID: <20080519124831.c8b6aef5.darcy@druid.net>

On Mon, 19 May 2008 18:00:30 +0200
<ervin.ramonllari at hotmail.com> wrote:
> Hi there,
> 
> I'm trying to install PyGreSQL for python 2.4.

I assume that you got the installer from http://www.PyGreSQL.org/.  If
so, please join the PyGreSQL list (see above URL) and explain the
problem there. It's my module but I don't create the Windows package.
Others on that list can probably help you better or create a fixed
installer if that is the problem.

> I googled around and I found that the problem could be the libpq.dll file. Then I copied the libpq.dll to the windows directory as well as in the Python dll's directory but the problem is still there.

It's a guess but perhaps you need to properly install the PostgreSQL
client rather than copying files piecemeal.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From dmitrey.kroshko at scipy.org  Fri May  9 06:22:51 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:22:51 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org> 
	<637ecc42-63f2-4ab0-b126-83059634f099@s50g2000hsb.googlegroups.com>
Message-ID: <d807e730-38cd-4ea9-a70c-84573b480998@a23g2000hsc.googlegroups.com>

in addition to killall and kill funcs mentioned above you could be
interested in pkill
see "man pkill" from terminal for more details

pkill python

or

pkill pyt

or

pkill <desired_signal> py


From mnordhoff at mattnordhoff.com  Sat May 10 22:34:59 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sun, 11 May 2008 02:34:59 +0000
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <48265B53.2080004@mattnordhoff.com>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Well, you should use "xrange(10)" instead of "range(10)". While range()
returns a list of every single number, xrange() returns an iterable
object that only generates them on-demand, so xrange(1) and
xrange(sys.maxint) will use the same amount of RAM.

(Not that it matters when it's only 10 items, of course.)

Other than that, "for i in xrange(10)" is a standard Python idiom, even
though it is a bit weird.
-- 


From paul.hankin at gmail.com  Tue May 20 12:08:25 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 09:08:25 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <6102785c-57ef-4bf7-9bd3-394ef6855aa7@z72g2000hsb.googlegroups.com>

On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:

> def compress(s):
>     seen = set()
>     return ''.join(c for c in s if c not in seen and (seen.add(c) or
> True))

Slightly nicer is to move the set add out of the conditional...

def compress(s):
    seen = set()
    return ''.join(seen.add(c) or c for c in s if c not in seen)

I wouldn't write it this way though :)

--
Paul Hankin


From hat at se-162.se.wtb.tue.nl  Tue May  6 10:26:04 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 16:26:04 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, jmDesktop <needin4mation at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I

Depends on your definition of 'Python does not have Interfaces'. They are not
in the official language, but they do exist. look into zope.interfaces, at
http://www.zope.org/Products/ZopeInterface .

> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm

I think you are still thinking with a Java mind-set (no idea about C#, never
programmed with it).

Interfaces mainly exist to formalize TO A COMPILER that an object will provide
certain stuff. In this way, the compiler can catch such errors at compile time.

Python on the other hand does very little at compile time (other than parse
errors). Instead, at run-time it performs the checks that something you want to
use is actually there.
(in the same way that you don't declare variables a priori. You simply use them
and Python creates them for you when needed).

As a result, you get much more light-weight, more dynamic, code, which supports
the RAD nature of Python what makes it so much more productive.

(after a few years Python, you may find the Java way of doing things clunky).


> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

You can continue doing everything exactly in the way you do now. Effectively
you would then be programming Java/C# in Python syntax. I believe you would
gain very little by that move.

If you dare let go of your old habits, and embrace the mindset of a new
language, you can learn a lot more, namely that programming can be done in many
different ways (even if all those ways are called OOP).
If you only have a hammer, the whole world looks like a nail. If you have a
whole toolbox, problems become much more diverse (subtle). You learn to use
the right tools for the right problem, and maybe you find new (better) ways of
approaching old problems.


In the process, you may lose details of how something was done in language X,
but that's why they have invented books.

Sincerely,
Albert


From jstucklex at attglobal.net  Tue May 27 22:49:42 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 22:49:42 -0400
Subject: php vs python
In-Reply-To: <g1ih0n$1lj$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru>	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>	<g1iem8$r5$3@news.mtu.ru>
	<nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>
	<g1ih0n$1lj$1@news.mtu.ru>
Message-ID: <XP-dnY-sxO_KVaHVnZ2dnUVZ_vOdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Tue, 27 May 2008 22:27:40 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
>>>
>>>> Ivan Illarionov wrote:
>>>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>>>
>>>>>> Greetings, Ivan Illarionov.
>>>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>>>
>>>>>>>> As I've said before - good programmers can write good code in any
>>>>>>>> language.
>>>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>>>> and easier in another.
>>>>>> It's obvious lie. If you have clear mind and you know language
>>>>>> you're using, there are absolutely NOTHING can deny you to write
>>>>>> clear code. Even using forth postfix notation, I have no problem
>>>>>> writing good code, it's as easy as writing bad code. And yes, I do
>>>>>> see the difference.
>>>>> No. Language does matter.
>>>> Not for a good programmer.  Only for half-assed ones.
>>> No. Language does matter
>> Only to half-assed programmers.  Good programmers can write good code in
>> any language they know.
>>
>> Ever seen good assembler?  It can be done - really!  Also fortran,
>> cobol, forth... the list goes on.
> 
> Yeah,
> mov eax, Jerry
> mov killfile, eax

Stoopid troll.  But we already know you can't write good code.  No 
surprise there.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From fuzzyman at gmail.com  Sat May 24 10:14:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 07:14:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>

On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?

Actually, 'data hiding', although vastly overused by the static crowd
can be a reasonable thing to want.

For example, at Resolver Systems we expose the spreadsheet object
model to our users. It hasa public, documented, API - plus a host of
undocumented internally used methods.

We would really *much* rather hide these, because anything our
customers start using (whether documented or not) we will probably
have to continue supporting and maintaining.

The 'we told you not to use that' approach, when applied to paying
customers doesn't really work... all they see is that you broke their
spreadsheet code by changing your API.

You can make members truly private by proxying, but it is a bit
ungainly.

Michael Foord
http://www.ironpythoninaction.com/


>
> In Python, the philosophy "we're all consenting adults here" applies.
> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put. Barriers such as enforced "private"
> attributes will only cause resentment when people, despite your
> anticipations, *need* to access them and are then forced to hack their
> way around them.
>
> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore. This is a string
> signal that the attribute is part of the implementation, not the
> interface. The reader is then on notice that they should not rely on
> that attribute; but they are not *prohibited* from using it if
> necessary to their ends.
>
> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?
>
> Perhaps you're confusing the "encapsulation" and "abstraction"
> principles for enforced access restrictions; they're not.
>
> > Will it ever be added to python?
>
> I hope not.
>
> --
>  \            "Why was I with her? She reminds me of you. In fact, she |
>   `\             reminds me more of you than you do!"  -- Groucho Marx |
> _o__)                                                                  |
> Ben Finney



From toby at tobiah.org  Fri May 30 15:21:50 2008
From: toby at tobiah.org (Tobiah)
Date: Fri, 30 May 2008 12:21:50 -0700
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
	<87y75srcx7.fsf@benfinney.id.au>
Message-ID: <pan.2008.05.30.19.21.49.303578@tobiah.org>


>> or a string iterable ? How can I do that. I have lots of '\r\n'
>> characters in the string which I think can be easier if it were made
>> into a list and I can easily see if the required value (its a numeral)
>> is present in it or not after some position or after some characters'
>> position.

They already are.  They are quite like lists in many ways:

>>> s = 'abcdefg'
>>> for c in s: print c
...
a
b
c
d
e
f
g
>>> s[3]
'd'
>>> s = "foo\r\n"
>>> s.find("\r")
3
>>> s.replace("\r", "").replace("\n", "")
'foo'
>>>           

** Posted from http://www.teranews.com **


From mal at egenix.com  Tue May  6 04:33:46 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 10:33:46 +0200
Subject: config files in python
In-Reply-To: <87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
Message-ID: <482017EA.40706@egenix.com>

On 2008-05-06 01:16, Matimus wrote:
> On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
>> Hi,
>>  In my application, I have some configurable information which is used
>> by different processes. currently I have stored configration in a
>> conf.py file as name=value pairs, and I am importing conf.py file to
>> use this variable. it works well
>>
>> import conf
>> print conf.SomeVariable
>>
>> but if I need to change some configuration parameteres,  it would need
>> me to restart processes.
>>
>> I want to store this data in some conf file (txt) and would like to
>> use it same way as I am using these variables as defined in py
>> files.
>>
>> one solution I can think of is writing data as a dictionary into conf
>> file. and then by reading data, apply eval on that data. and update
>> local dict? but this is not a good solution....
>>
>> any pointers?
>>
>> Sandip
> 
> I would load the configuration file using `imp.load_source'. This
> allows you to load the config file by filename, and gets away from the
> issue of accidentally importing a file somewhere else in pythons
> search path. Also, calling imp.load_source will reload the module when
> called a second time.
 >
> http://docs.python.org/lib/module-imp.html

Why not just use execfile() ?

http://www.python.org/doc/2.2.3/lib/built-in-funcs.html

> [conf.py]
> a = 1
> b = 2
> class c:
>     a = "hello"
>     b = "world"
> [/end conf.py]
> 
>>>> conf = imp.load_source("conf", "./conf.py")
>>>> conf.a
> 1
>>>> conf.b
> 2
>>>> conf.c.a
> 'hello'
>>>> conf.c.b
> 'world'
> 
> 
> 
> There are so many ways potential solutions to your problem that,
> without any more details, it is hard to suggest anything.
> 
> Here are some potential solutions:
> 
> ConfigParser - module for handling ini files
> xml - several built-in modules for handling XML files
> sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
> for config data)
> windows registry  - _winreg module
> pickle - serialize python objects
> marshal - similar to pickle, only works for simple objects
> 
> Those are just the built-in solutions. If you wanna look at 3rd party
> solutions, prepare for overload. The number of alternative INI parsers
> alone is staggering.
> 
> Also, there are many ways to organize your data and use a solution
> similar to what you are already using.
> 
> I guess what I'm trying to say is... don't roll your own, it would be
> a waste of time, this problem has been solved 100s of times. That is,
> unless you want to do it for fun.
> 
> Matt
> --
> http://mail.python.org/mailman/listinfo/python-list

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From mishok13 at gmail.com  Tue May 27 10:50:22 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 17:50:22 +0300
Subject: New chairman
In-Reply-To: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
Message-ID: <192840a00805270750r5e4b89e9y1a8980714ef86671@mail.gmail.com>

2008/5/27 Sverker Nilsson <sn at sncs.se>:
> seems to be needed
>
> He doesn't seem to care much anyway now
>
> Or if he cares, he have many other assignments

Who are you talking about?

>
> So should we try to elect a new chairman?

Chairman? Elaborate please.

>
> I am probably not eligible. There must be many others.!
>
> Do you dare?consper
>

Hm, are you and castrionpi twin brothers or something?

> S.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From larzluv at hotmail.com  Mon May 12 03:15:00 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Mon, 12 May 2008 00:15:00 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>
Message-ID: <27bc596d-0775-468b-9a1b-fd2513b73812@k37g2000hsf.googlegroups.com>

On May 12, 1:34 am, Larry Hale <larz... at hotmail.com> wrote:

> The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
> has the man pages...


Err...  I meant "http://downloads.sourceforge.net/gnuwin32/file-4.21-
bin.zip?modtime=1180175868&big_mirror=1"!  :)


From marlin_rowley at hotmail.com  Fri May 16 18:15:51 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 17:15:51 -0500
Subject: numpy.frombuffer != unpack() ??
Message-ID: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>

All:
 
I'm getting different floating point values when I use numpy vs. unpack().
 
frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
buffer = unpack("!f", byte)
 
frgba[0] != buffer[0]
 
why?  This is forcing me use the unpack() function since it's giving me the correct values.  What am I doing wrong?
 
-M
 
 
_________________________________________________________________
Change the world with e-mail. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ChangeWorld
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From arnodel at googlemail.com  Fri May  9 07:13:46 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 9 May 2008 04:13:46 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <47abefdf-058e-495f-ae91-3fe0c831ccd7@25g2000hsx.googlegroups.com>



dmitrey wrote:
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
>
> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> > On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> >
> > > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > > and
> > > list2 = [0, 2, 4] # integer elements
> >
> > > howto (I mean most simple recipe, of course) form list3 that contains
> > > elements from list1 with indexes from list2, i.e.
> >
> > list3 = [list1[i] for i in list2]
> >
> > --
> > Paul Hankin

This works under python 2.0+, I think.

Before that, you could have written:

list3 = map(list1.__getitem__, list2)

--
Arnaud


From deets at nospam.web.de  Mon May  5 06:22:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 12:22:38 +0200
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
Message-ID: <6885g8F2s6gaeU1@mid.uni-berlin.de>

ETP wrote:

> I have a little robot project I'm programming in python using the
> Lynxmotion SSC-32 servo controller via serial.  I'd like to use a USB
> game controller (PS2 style) to control the robot.
> 
> I've read a number of threads about the difficulty of using USB
> without extensive understanding of the way it works, but a few have
> stated that HID is different somehow.  I definitely do not have any
> USB knowledge, and I don't care to get into that.  However, if USB-HID
> is much simpler I would love to learn.
> 
> I have the python extensions for windows:
>      http://sourceforge.net/project/showfiles.php?group_id=78018
> but I haven't found any documentation on how to implement HID in
> python.  Can anyone give me some examples or links?

You seem to misunderstand HID. HID is a protocol over USB (and Bluetooth I
believe) that will create user input device events which are mapped to your
OS input layer. That means that whenever you e.g. attach a keyboard device,
it's keyboard events will generate key-strokes on screen.

There are various kinds of HID-devices, and gamepads/joysticks generate
certain events.

So you need to look up you OS game device API and use that. Then attaching
any compliant HID-device should work.

Diez


From tjreedy at udel.edu  Sat May 24 01:15:17 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 01:15:17 -0400
Subject: would this be called bug?
References: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>
Message-ID: <g18896$jg3$1@ger.gmane.org>


"Amit Gupta" <emailamit at gmail.com> wrote in message 
news:ab143223-2592-4973-943a-a4bd94e25701 at u36g2000prf.googlegroups.com...
| The code is attached below. Basically I am taking a substring of
| variable m, and using "buffer" instead of slicing.
|
| However, the application of int on that buffer start correctly from
| the offset, but it scans all the way to the end, instead of stopping
| at the length of the buffer.
|
| It works however, if I apply str function to output of buffer
| function.
|
| -A
|
|
| (Pdb) m = "AA1234AA"
| (Pdb) x = buffer(m, 2, 4)
| (Pdb) x
| <read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
| (Pdb) int(x)
| *** ValueError: invalid literal for int() with base 10: '1234AA'
| (Pdb) m = "AA1234AA"
| (Pdb) m = "AA1234"
| (Pdb) x = buffer(m, 2, 4)
| (Pdb) int(x)
| 1234
| (Pdb)

Just so you know, buffer() has been deprecated in 2.x and has been replaced 
in Py3 by memoryview() (I believe) because others have had problems with 
buffer().
Don't know any more.





From castironpi at gmail.com  Wed May 14 14:16:28 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:16:28 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com> 
	<8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com>
Message-ID: <5cedfda6-a64a-456a-ab90-ed33229036a2@b64g2000hsa.googlegroups.com>

On May 14, 1:09?pm, castiro... at gmail.com wrote:
> On May 14, 1:07?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > > How does it generate text?
>
> > > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > > place to start the ring.
>
> > > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > > some cubic verticals.
>
> > > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > > can pretty well win work.- Hide quoted text -
>
> > > > > - Show quoted text -
>
> > > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > If Python can plot in to chess, and Tron rings live, then why not
> > > group it knew?- Hide quoted text -
>
> > > - Show quoted text -
>
> > That would be know. ?Plot and split in too.- Hide quoted text -
>
> > - Show quoted text -
>
> Now can I catch function-type objects from a throw? ?I'm crossing all
> of those.- Hide quoted text -
>
> - Show quoted text -

I have destin and fate and die, growth sustanance and decay.  Now cars
are important, but not logically still.  I am certain I play, so;
where's the ring?


From tjreedy at udel.edu  Fri May 16 20:15:37 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 20:15:37 -0400
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <g0l839$gri$1@ger.gmane.org>

| On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
| > Yesterday we found the cause of a bug that has caused problems for a 
long time.
| > It appeared to be the following:
| >
| > class A(object):
| >     pass
| >
| > print min(1.0, A())
| >
| > which is accepted by Python even though the A() object is not numerical 
in
| > nature.
| >
| > The cause of this behavior seems to be the compare operation of the 
object
| > class.
| >
| > Is there a way to disable this behavior in Python (other than deriving 
a new
| > 'object-like' class that doesn't do comparisons?)

Use Python 3! That is one of many improvements. 





From gagsl-py2 at yahoo.com.ar  Mon May 12 02:18:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:18:02 -0300
Subject: Best technology for agent/web server architecture
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
	<4823268D.1060602@egenix.com>
	<c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>
Message-ID: <op.ua02gchlx6zn5v@a98gizw.cpe.telecentro.net.ar>

> 2008/5/8 M.-A. Lemburg <mal at egenix.com>:
>
>> SOAP would be a good choice if you want to send to data to other
>> servers as well, e.g. Java-based ones.
>>
>> XML-RPC and JSON are better for simple data structures.
>>
>> If you have control over both client and server and don't
>> need to bother with other backends or frontends, Python
>> pickle is the best choice.

En Fri, 09 May 2008 05:41:07 -0300, Florencio Cano <florencio.cano at gmail.com> escribi?:

> I have control over agent and client but I'm not sure how to use
> pickle for this task. Do you suggest to pickle the objects that I want
> to send and send it over a usual socket? I have searched a bit in
> Google and I have seen that Pickle is insecure by default. What do you
> think about this?

"insecure" means that someone could build a specially crafted pickle able to run arbitrary code on the unpickling environment. One way to avoid that is to only accept pickles from trusted sources: using SSL by example.

-- 
Gabriel Genellina



From darkwind.87 at gmail.com  Thu May 29 04:10:58 2008
From: darkwind.87 at gmail.com (Dark Wind)
Date: Thu, 29 May 2008 01:10:58 -0700
Subject: code of a function
Message-ID: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>

Hi,

Is there any command in Python which gives the code for a function like just
typing the name of a function (say svd) in R returns its code.

Thank you
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From timr at probo.com  Fri May  2 01:32:28 2008
From: timr at probo.com (Tim Roberts)
Date: Fri, 02 May 2008 05:32:28 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <ek9l14d5mlm2q70spgulo74k10euukp3it@4ax.com>

Yves Dorfsman <yves at zioup.com> wrote:
>
>On UNIX, some people use
>#!/usr/bin/env python
>
>While other use
>#!/usr/bin/python
>
>Why is one preferred over the other one ?

The /usr/bin/env solution finds the Python interpreter anywhere on the
PATH, whether it be /usr/bin or /usr/local/bin, or whatever.  With
/usr/bin/python, it MUST be in /usr/bin.

Way back when, Python wasn't included in Linux distributions by default, so
it was difficult to predict where it would be.  /usr/bin/env, on the other
hand, is well-established at that location.

These days, since Python is nearly ubiquitous, I suspect it is not so
important.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From http  Fri May 23 06:48:56 2008
From: http (Paul Rubin)
Date: 23 May 2008 03:48:56 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
Message-ID: <7xk5hll2hz.fsf@ruckus.brouhaha.com>

"inhahe" <inhahe at gmail.com> writes:
> planets are spherical (all implementations of Python are not natively 
> compiled (and you said for whatever definition)), and b) It's a far cry to 
> imagine a planet coming into being that's not spherical (a language as 
> dynamic as Python, or most other scripting languages, would be either 
> extremely difficult or impossible to make a native compiler for).

There are native Python compilers, see psyco and pypy.


From jmcmonagle at velseis.com.au  Mon May 19 18:44:05 2008
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Tue, 20 May 2008 08:44:05 +1000
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
In-Reply-To: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
Message-ID: <483202B5.2000109@velseis.com.au>

notnorwegian at yahoo.se wrote:
> ' '.join([`x  x` for x in range(1, 6)])
> 
> anyone can tell me what im doing wrong?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


' '.join(['%s %s' % (str(x), str(x)) for x in range(1,6)])

or

' '.join([str(x)+' '+str(x) for x in range(1,6)])


outputs....

'1 1 2 2 3 3 4 4 5 5'


Is that what you were after ?


From slesarev.anton at gmail.com  Wed May  7 06:13:04 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Wed, 7 May 2008 03:13:04 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
Message-ID: <b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>

I try to save my time not cpu cycles)

I've got file which I really need to parse:
-rw-rw-r--  1 xxx  xxx  3381564736 May  7 09:29 bigfile

That's my results:

$ time grep "python" bigfile | wc -l
    2470

real    0m4.744s
user    0m2.441s
sys     0m2.307s

And python scripts:

import sys

if len(sys.argv) != 3:
   print 'grep.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r')

print ''.join((line for line in f if sys.argv[1] in line)),

$ time python grep.py "python" bigfile | wc -l
    2470

real    0m37.225s
user    0m34.215s
sys     0m3.009s

Second script:

import sys

if len(sys.argv) != 3:
   print 'grepwc.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r',100000000)

print sum((1 for line in f if sys.argv[1] in line)),


time python grepwc.py "python" bigfile
2470

real    0m39.357s
user    0m34.410s
sys     0m4.491s

40 sec and 5. This is really sad...

That was on freeBSD.



On windows cygwin.

Size of bigfile is ~50 mb

$ time grep "python" bigfile | wc -l
51

real    0m0.196s
user    0m0.169s
sys     0m0.046s

$ time python grepwc.py "python" bigfile
51

real    0m25.485s
user    0m2.733s
sys     0m0.375s



From tjreedy at udel.edu  Sun May 25 21:23:42 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:23:42 -0400
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
	<eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com><83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com><59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>
	<g1cu8n$5g4$1@aioe.org>
Message-ID: <g1d3et$ep4$1@ger.gmane.org>


"Martin Manns" <mmanns at gmx.net> wrote in message 
news:g1cu8n$5g4$1 at aioe.org...
| On Sun, 25 May 2008 14:39:28 -0700 (PDT)
| bearophileHUGS at lycos.com wrote:
|
| > This may have some bugs left, but it looks a bit better:
| [...]
| >         self._hash = hash(self._func.func_code) ^ \
| >                      hash(tuple(signature[0]) + tuple(signature[1:3]))
| >     def __eq__(self, other):
| >         return self._func.func_code == other._func.func_code and \
| >                getargspec(self._func) == getargspec(other._func)
| >     def __hash__(self):
| >         return self._hash
| >     def __call__(self, *args, **kwargs):
| >         return self._func(*args, **kwargs)
| >
| > I haven't put a full hashing of getargspec(self._func) too into the
| > __init__() because it may contain too much nested unhashable
| > structures, but the __eq__() is able to tell them apart anyway, with
| > some collisions.
|
| Looking at a function:
|
| >>> a=lambda x:x
| >>> dir(a)
| ['__call__', '__class__', '__delattr__', '__dict__', '__doc__',
| '__get__', '__getattribute__', '__hash__', '__init__', '__module__',
| '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',
| '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults',
| 'func_dict', 'func_doc', 'func_globals', 'func_name']
|
| Should func_globals and func_name also be taken into account for
| __eq__()?

It depends on what *you* want == to mean.

tjr





From castironpi at gmail.com  Sat May  3 19:54:54 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 3 May 2008 16:54:54 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
Message-ID: <9c6347c2-1d28-407d-80db-37d73c5a8f22@w74g2000hsh.googlegroups.com>

On May 3, 1:59?pm, bearophileH... at lycos.com wrote:
> Sometimes different languages suggests me ways to cross-pollinate
> them.
>
> (Note: probably someone has already suggested (and even implemented)
> the following ideas, but I like to know why they aren't fit for
> Python).
>
> Python generators now allow me to package some code patterns common in
> my code, that other (older) languages didn't allow me to extract; for
> example given a sequence (array, list, etc) of items now and then I
> need to scan all the upper triangle of their cross matrix:
>
> def xpairs(seq):
>
> ? ? len_seq = len(seq)
>
> ? ? for i, e1 in enumerate(seq):
>
> ? ? ? ? for j in xrange(i+1, len_seq):
>
> ? ? ? ? ? ? yield e1, seq[j]
>
> Or adjacent ones (there are ways to generalize the following function,
> but this the most common situation for me):
>
> def xpairwise(iterable):
>
> ? ? return izip(iterable, islice(iterable, 1, None))
>
> That xpairs() generator is nice, but it's not the best possible code
> (but you may disagree with me, and you may think that code better than
> the successive D code that uses two slices). Inside it I can't use a
> list slicing because it copies subparts of the list, probably becoming
> too much slow (for example if len(seq) == 1000).
>
> Compared to Python, the D language is at lower level, so you may
> expect it to have a worse syntax (but the ShedSkin compiler has shown
> me once for all that you can have a language that is both high-level,
> with a short & sexy syntax, and very fast), but you can define a
> xpairs() iterable class in it too, and the core of that iterable class
> there's a method that may look like this:
>
> if (this.seq.length > 1)
>
> ? foreach (i, e1; this.seq[0 .. $-1])
>
> ? ? foreach (e2; this.seq[i+1 .. $]) {
>
> ? ? ? result = dg(e1, e2); if (result) break; // yield
>
> ? ? }
>
> Where the strange last line is the yield, and the $ inside [] is the
> length of the current array (a very clever idea that avoids the need
> for negative indexes).
>
> That D code is as fast or faster than the code you can back-translate
> from Python, this is possible because in D arrays slices are very
> light, they are a struct of <length, pointer> (in the future they may
> change to a couple of pointers, to speed up the array slice scanning).
> So if you slice an array you don't copy its contents, just the start-
> end points of the slice. If you read/scan the slice that's all you
> have, while if you write on it, D uses a Copy-On-Write strategy, that
> is a just-in-time copy of the slice contents.
>
> In practice this speeds up lot of code that manages strings and arrays
> (like a XML parser, making it among the faster ones).
>
> Being the slice a struct, it's stack allocated, so the inner foreach
> doesn't even create a slice object in the heap each time the outer
> foreach loops.
>
> One problem with this strategy is that if you have a huge string, and
> you keep only a little slice of it, the D garbage collector will keep
> it all in memory. To avoid that problem you have to duplicate the
> slice manually:
>
> somestring[inf...sup].dup;
>
> I think Psyco in some situations is able to manage string slices
> avoiding the copy.
>
> I think Python 3.0 too may enjoy a similar strategy of light slices +
> COW for strings, lists and arrays (tuples and strings don't need the
> COW).
>
> Bye,
>
> bearophile

In my understanding, the operating system links files across multiple
sections on a disk, while keeping those details from client software.

Files:

AAAA    BBBB AA CCCCCCCCC

While File A still reads as: AAAAAA, correctly.

Modifications to B as follow:

Files:

AAAA    BBBB AA CCCCCCCCC BBBB

In the case of a large mutable string, modifications can cause linear-
time operations, even if only making a constant-time change.

String:

abcdefg

Modification:

aAbcdefg

causes the entire string to be recopied.  Expensive at scale.

A string-on-disk structure could provide linking, such as a String
File Allocation Table.

abcdefg  A

correctly reads as:

aAbcdefg


From ivlenin at gmail.com  Fri May 23 04:27:27 2008
From: ivlenin at gmail.com (I V)
Date: Fri, 23 May 2008 08:27:27 GMT
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <PdvZj.257$xZ.218@nlpi070.nbdc.sbc.com>

On Fri, 23 May 2008 00:12:35 -0700, Marc Oldenhof wrote:
> It seems that Python calls numpy's "all" instead of the standard one, is
> that right? If so, how can I call the standard "all" after the numpy
> import? ["import numpy" is not a desirable option, I use a lot of math
> in my progs]

I think the ideal solution is to try and persuade yourself that typing 
"numpy." in front of some functions now and then is not that big a price 
to pay to avoid name collisions; using an editor with code completion 
would probably help in that task.

You could also try:

import numpy as n

which reduces the typing a bit and limits you to one possible name 
collision, or

from numpy import array, gradient #and whatever else you need

or 

import numpy

array = numpy.array
gradient = numpy.gradient # Then you can access the names you use a lot 
		 	  # directly, while accessing stuff you use less
			  # frequently via numpy.whatever

in which case you'll know exactly which names you're overwriting. Peter's 
solution, of explicitly deleting some names that you've imported, strikes 
me as less good, because you might find the same problem recurs later, if 
the numpy developers add new names to the module.


From beema.shafreen at gmail.com  Wed May 21 04:40:26 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Wed, 21 May 2008 14:10:26 +0530
Subject: Typeerror
Message-ID: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>

Hi all,
I getting the following error when i run my scirpt ,
can somebody help me regarding this to solve the type error problem


Traceback (most recent call last):
  File "get_one_prt_pep.py", line 59, in ?
    if len(data[res])<=1:
TypeError: string indices must be integers


-- 
Beema Shafreen
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From george.sakkis at gmail.com  Thu May  1 19:50:20 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 16:50:20 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.432.1209678316.12834.python-list@python.org>
	<b99f71ed-4279-4412-82d0-b2a8ef6a4a87@j33g2000pri.googlegroups.com>
Message-ID: <4b35fb1d-e273-4c94-b49c-c9e6cdee06c0@24g2000hsh.googlegroups.com>

On May 1, 7:13?pm, Graham Dumpleton <Graham.Dumple... at gmail.com>
wrote:
> On May 2, 7:45 am, Christian Heimes <li... at cheimes.de> wrote:
>
>
>
> > jmDesktop schrieb:
>
> > > I have been to the main python site, but am still confused. ?I have
> > > been using .net, so it may be obvious how to do this to everyone
> > > else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> > > but I would like to know how to create web pages without these. ?If I
> > > havemod_pythonor fastcgi on apache, where do I start? ?I don't have
> > > clue where to begin to create a web page from scratch in python. ?I am
> > > sure I will want to access database, etc., all the "normal" stuff, I
> > > just want to do it myself as opposed to the frameworks, for learning.
>
> > I highly recommend WSGI instead ofmod_pythonor (fast)cgi. I've heard
> > only bad things aboutmod_pythonover the past years and CGI is totally
> > old school.
>
> > Check out Python Paste, CherryPy and Django. You can also try the Zope,
> > Zope3 and Plone world but Zope is usually for larger and complex
> > applications.
>
> > Most frameworks come with their own little web server for development, too.
>
> I'd also suggest avoiding coding anything directly to mod_python and
> instead base things on WSGI. You can still run it on mod_python with a
> suitable adapter, but you can also run it with mod_wsgi, mod_fastcgi,
> or using pure Python web servers such as the one in Paste as well.
>
> For a low level nuts and bolts (anti framework) approach I'd suggest
> looking at:
>
> ?http://dev.pocoo.org/projects/werkzeug/
>
> This gives you all the basic components, but it is really up to you as
> to how you put them together, which seems to be what you want to be
> able to do.

Or if you don't want to use any 3rd party package and have Python 2.5,
you may start from http://www.xml.com/pub/a/2006/09/27/introducing-wsgi-pythons-secret-web-weapon.html.
Here's the standard "Hello world!" example:

from wsgiref.simple_server import make_server

def application(environ, start_response):
    start_response('200 OK',[('Content-type','text/html')])
    return ['<html><body>Hello World!</body></html>']

httpd = make_server('', 8000, application)
print "Serving HTTP on port 8000..."
httpd.serve_forever()

and point your browser to http://localhost:8000/

HTH,
George


From tjreedy at udel.edu  Wed May 14 13:48:14 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 13:48:14 -0400
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com><mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <g0f8kq$k97$1@ger.gmane.org>


"Nikhil" <mnikhil at gmail.com> wrote in message 
news:g0ev6o$utb$1 at registered.motzarella.org...
| Then why to have __len__() internal method at all when the built-in
| len() is faster?

Nearly all syntax constructions and builtin functions are implemented by 
calling one or another of the __special__ methods.  This is what makes 
Python code so generic and plugging your own classes into the system so 
easy.

For example, collection[key] = value is implemented by calling 
collection.__setitem__(key, value).  When you define a class with that 
method, that syntax will work with its instances just the same as for 
builtin classes.

Similarly, a+b is implemented by calling a.__add__(b).  So if a class 
defines __add__, you can 'add' its instances (whatever 'add' means for that 
class) with '+'.

(The fact that an *implementation* may followup the 'as if' rule and 
optimize operations for certain classes by combining steps does not negate 
the *language* rules given above.)

tjr





From paul.hankin at gmail.com  Tue May 27 16:35:14 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 27 May 2008 13:35:14 -0700 (PDT)
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
Message-ID: <0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>

On May 27, 9:21?pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> I have a generic (do nothing) exception class that's coded like this:
>
> class MyError(exceptions.Exception):
> ? ? def __init__(self,args=None):
> ? ? ? ? self.args = args
>
> When I attempt to raise this exception via 'raise MyError' I get an exception
> within the MyError constructor __init__ as follows:
>
> Traceback (most recent call last):
> [lines deleted]
> ? File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
> MyStuff.py", line 7, in __init__
> ? ? self.args = args
> TypeError: 'NoneType' object is not iterable
>
> Ummm... why should 'args' have to be iterable anyway? ?I don't understand
> what's going on here? ?Could someone help me with this?

Did you actually write self,args = args?

--
Paul Hankin


From jackyuke at gmail.com  Sat May 24 08:48:57 2008
From: jackyuke at gmail.com (Jack Yu)
Date: Sat, 24 May 2008 12:48:57 +0000 (UTC)
Subject: Popen: NameError: name 'PIPE' is not defined
References: <mailman.1522.1211630957.12834.python-list@python.org>
Message-ID: <g192ro$jb8$1@news.cn99.com>

On Sat, 24 May 2008 14:09:07 +0200?Mathieu Prevot wrote?

> Hi
> 
> I import subprocess and use Popen, but PIPE is not defined. I used
> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
> always the same. What am I missing ?
> 
> Thanks
> Mathieu

Try subprocess.PIPE.


From agustin.villena at gmail.com  Wed May 21 19:48:04 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Wed, 21 May 2008 16:48:04 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>
	<mailman.1386.1211299881.12834.python-list@python.org>
Message-ID: <1f686bef-db23-4e17-bedc-434495381542@d1g2000hsg.googlegroups.com>

On 20 mayo, 12:10, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 19 May 2008 10:54:05 -0300, Agustin Villena
> <agustin.vill... at gmail.com> escribi?:
>
> > On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> Agustin Villena schrieb:
>
> >> > is there anyway to show the class of amethodin anexception's
> >> > traceback?
> >> > I want to improve the line
> >> > File "G:\dev\exceptions\sample.py", line 3, in foo
> >> > to
> >> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>
> >> It should be. You can get a dictionary of the locals of anexception
> >> stack frame, of which you could extract the self-parameter's class.
>
> > I digged on sys.exc_info() object and the traceback module and I
> > could't figure how I can get the locals() of theexceptionstackframe
>
> Put this function in traceback.py, and replace the lines
>          name = co.co_name
> with
>          name = guess_full_method_name(f)
> everywhere.
> Please read the docstring!!!
>
> def guess_full_method_name(frame):
>      """Guess classname.methodname for a given frame.
>
>      Only a guess!
>      Assumes the frame belongs to an instancemethod
>      whose first argument is "self", or a classmethod
>      whose first argument is "cls".
>      Doesn't handle correctly any other situation.
>      Returns the class name of the object on which
>      the method was called, not the class where
>      the method was actually defined.
>      """
>      cls_name = None
>      fun_name = frame.f_code.co_name
>      self = frame.f_locals.get('self', None)
>      if self is None:
>          cls = frame.f_locals.get('cls', None)
>      else:
>          cls = getattr(self, '__class__', None)
>      if cls is not None:
>          cls_name = getattr(cls, '__name__', None)
>          if cls_name is not None:
>              return '%s.%s' % (cls_name, fun_name)
>      return fun_name
>
> --
> Gabriel Genellina

Thanks!  I'll try it

Agustin


From george.sakkis at gmail.com  Fri May  9 21:05:26 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 18:05:26 -0700 (PDT)
Subject: Property in derived class
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <7f3a3e02-8207-4661-94fa-48a518720a46@r66g2000hsg.googlegroups.com>

On May 9, 5:20?pm, Joseph Turian <tur... at gmail.com> wrote:
> If I have a property in a derived class, it is difficult to override
> the get and set functions: the property's function object had early
> binding, whereas the overriden method was bound late.
> This was previously discussed:
> ? ?http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?

Using the overridable property recipe [1], it can be written as:

class AbstractFoo(object):

    def _getFoo(self):
        raise NotImplementedError('Abstract method')
    def _setFoo(self, signals):
        raise NotImplementedError('Abstract method')

    foo = OProperty(_getFoo, _setFoo)

HTH,
George


[1] http://infinitesque.net/articles/2005/enhancing%20Python's%20property.xhtml


From gagsl-py2 at yahoo.com.ar  Sun May 11 00:16:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 01:16:46 -0300
Subject: How to call a file
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
	<4825C01F.1070409@islandtraining.com>
Message-ID: <op.uay158tfx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 12:32:47 -0300, Gary Herron <gherron at islandtraining.com> escribi?:

> Chris Sprinkles wrote:
>> I'm still having trouble with calling a text file and I know its so
>> simple here is the code
>> ----------------------------------------------------
>> work = open('C:\Documents and Settings\Administrator\My
>> Documents\Chris\Python\Python\work.txt', 'r')

Also, remember that \ is the escape character for strings in Python. In this particular case it doesn't matter just because you didn't hit any valid escape, but in general, use:
"C:\\Documents and Settings\\Adm..."
r"C:\Documents and Settings\Adm..."
In most cases, Windows recognizes forward slashes also: "C:/Documents and Settings/Adm..."

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Fri May 23 04:35:28 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 08:35:28 GMT
Subject: Python and Flaming Thunder
References: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
Message-ID: <Xns9AA761012A691duncanbooth@127.0.0.1>

Brian Quinlan <brian at sweetapp.com> wrote:

> Dave Parker wrote:
>>> Or just:
>>>
>>> If command is "quit" ...
>> 
>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>> for assigning and checking types.  For example, to read data from a
>> file and check for errors:
>> 
>>      Read data from "input.txt".
>>      If data is an error then go to ...
> 
> Hey Dave,
> 
> Does this mean that Flaming Thunder requires explicit checking rather 
> than offering exceptions?

It looks that way but he doesn't seem to have got as far as documenting 
errors: the documentation gives several examples of that form and says that 
'error' is a reserved word but says nothing about how you create an error 
of if you can distinguish one error from another:

I'm guessing you can't as FT doesn't appear to have any concept of 
attributes on objects (or even any concept of objects): so far as I can see 
the only types are integers, rationals, intervals and strings (and real 
numbers if you pay real money for them).

Maybe I'm missing something though, because I don't see how you can do 
anything useful with out at least some sort of arrays (unless you are 
supposed to store numbers in long strings).

-- 
Duncan Booth http://kupuguy.blogspot.com


From lists at cheimes.de  Wed May  7 16:47:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 22:47:51 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
Message-ID: <48221577.6030408@cheimes.de>

grayaii schrieb:
> There are so many threads on this subject, but I ran across a
> situation on Windows that I can't figure out.
> 
> I'm trying to run this little command-line exe and when I launch like
> this, it hangs:
> 
>>>> import subprocess
>>>> command = r'c:\mydir\foo.exe'
>>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>>> returncode = run.wait()  ## HANGS HERE ##

The code blocks because you aren't reading from stdout and stderr. Use
the communicate() method instead of wait().

Christian



From deets at nospam.web.de  Fri May 30 13:40:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 19:40:17 +0200
Subject: Calling instance methods from a decorator
In-Reply-To: <87d4n3n1z7.fsf@internal.daycos.com>
References: <87d4n3n1z7.fsf@internal.daycos.com>
Message-ID: <6aasg8F35t0j9U1@mid.uni-berlin.de>

Kirk Strauser schrieb:
> I'm trying to write a decorator that would do something like:
> 
> def trace(before, after):
>     def middle(func):
>         def inner(*args, **kwargs):
>             func.im_self.debugfunction(before)
>             result = func(*args, **kwargs)
>             func.im_self.debugfunction(after)
>             return result
>         return inner
>    return middle
> 
> class Foo(object):
>     def __init__(self, myname):
>         self.name = myname
> 
>     def debugfunction(self, message):
>         print 'Instance %s says: %s' % (self.name, message)
> 
>     @trace('calling', 'finished')
>     def bar(self, arg):
>         print arg
> 
>>>> Foo('snake').bar(123)
> Instance snake says: calling
> 123
> Instance snake says: finished
> 
> The gotcha seems to be that there's no way to get to 'self' from within the
> "inner" function, since func will only have the "normal" attributes:
> 
>>>> print dir(func)
> ['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name']
> 
> There's no nice im_self to bounce off of or anything.  I seem to be going
> about this all wrong.  What's a good approach to get the desired effect?

Of course you can get the self - just use the first paramter, because it 
  *is* self. Self is just a parameter - nothing special.

Alternatively, declare inner like this:

def inner(self, *args, **kwargs):
     ...
     try:
        return func(self, *args, **kwargs)
     finally:
        ....


Note the additional try/finally. It's got nothing todo with your 
original problem - but you should use it to guarantee that your trace 
gets called when leaving the call.

Diez


From pavlovevidence at gmail.com  Fri May  2 14:07:45 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 2 May 2008 11:07:45 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87abj91j8u.fsf@benfinney.id.au> 
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au> 
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au> 
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<mailman.461.1209740889.12834.python-list@python.org>
Message-ID: <cfb128ff-516d-4501-8b7c-3d8bf794ef7b@l42g2000hsc.googlegroups.com>

On May 2, 11:07 am, "D'Arcy J.M. Cain" <da... at druid.net> wrote:
> On Sat, 03 May 2008 00:43:02 +1000
>
> Ben Finney <bignose+hates-s... at benfinney.id.au> wrote:
> > Roy Smith <r... at panix.com> writes:
> > > Have you ever shipped software to a customer?
>
> > Yes, and all parties have been quite happy with the results.
>
> When some of us talk about shipping software we aren't talking about a
> 20 line script delivered to our uncle's construction company office.  We
> are talking about millions of lines of code in thousands of programs and
> modules that has to run out of the box on whatever system the client
> happens to run on.

If you're shipping a program that large you out to be packaging the
Python interpreter with it.

Frankly, this whole discussion is silly, as if it's some kind hard
thing to open the script with a text editor and modify the shbang
line.


Carl Banks



> > > Customer: "I can't install it there because <insert whatever silly
> > > reason the customer has>. If you can't make your product work
> > > without requiring me to install python in /usr/bin, I'm afraid I
> > > can't buy your product".
>
> > At this point they have the simple option of running the program with
> > 'python /path/to/the/program'. It's certainly not a case of "can't
> > make the product work".
>
> Simple for your 20 line single script.  Not so simple for my million
> line, integrated system that has to work everywhere.
>
> > It is, however, a case of "can't automatically account for every local
> > customisation sysadmins choose to make on their systems". Perfectly
> > willing to work with them to get their specific environment working,
> > but as a matter of simple economics it's not worth my time to attempt
> > to make such corner cases work automatically.
>
> If by "corner case" you mean "some system that I don't personally run"
> then OK but to some of us your system is the corner case and we would
> like our code to run there as well.
>
> Real software has to deal with the fact that support costs money.
> You may be able to deal with one or two clients that way but that does
> not scale very well.
>
> > If they've already chosen to install Python to some unpredictable
> > location, they know what they're doing enough to invoke the program in
> > a specific way to get it working.
>
> Unpredictable to you.  Perfectly predictable on their system.
>
> I do believe I am done with this thread.
>
> --
> D'Arcy J.M. Cain <da... at druid.net>         |  Democracy is three wolveshttp://www.druid.net/darcy/               |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.



From needin4mation at gmail.com  Tue May  6 11:09:53 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Tue, 6 May 2008 08:09:53 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
Message-ID: <29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>

On May 6, 10:26?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-06, jmDesktop <needin4mat... at gmail.com> wrote:
>
> > Studying OOP and noticed that Python does not have Interfaces. ?Is
> > that correct? ?Is my schooling for nought on these OOP concepts if I
>
> Depends on your definition of 'Python does not have Interfaces'. They are not
> in the official language, but they do exist. look into zope.interfaces, athttp://www.zope.org/Products/ZopeInterface.
>
> > use Python. ?Am I losing something if I don't use the "typical" oop
> > constructs found in other languages (Java, C# come to mind.) ?I'm
>
> I think you are still thinking with a Java mind-set (no idea about C#, never
> programmed with it).
>
> Interfaces mainly exist to formalize TO A COMPILER that an object will provide
> certain stuff. In this way, the compiler can catch such errors at compile time.
>
> Python on the other hand does very little at compile time (other than parse
> errors). Instead, at run-time it performs the checks that something you want to
> use is actually there.
> (in the same way that you don't declare variables a priori. You simply use them
> and Python creates them for you when needed).
>
> As a result, you get much more light-weight, more dynamic, code, which supports
> the RAD nature of Python what makes it so much more productive.
>
> (after a few years Python, you may find the Java way of doing things clunky).
>
> > afraid that if I never use them I'll lose them and when I need them
> > for something beside Python, I'll be lost. ?Thank you.
>
> You can continue doing everything exactly in the way you do now. Effectively
> you would then be programming Java/C# in Python syntax. I believe you would
> gain very little by that move.
>
> If you dare let go of your old habits, and embrace the mindset of a new
> language, you can learn a lot more, namely that programming can be done in many
> different ways (even if all those ways are called OOP).
> If you only have a hammer, the whole world looks like a nail. If you have a
> whole toolbox, problems become much more diverse (subtle). You learn to use
> the right tools for the right problem, and maybe you find new (better) ways of
> approaching old problems.
>
> In the process, you may lose details of how something was done in language X,
> but that's why they have invented books.
>
> Sincerely,
> Albert

I would imagine this is why I haven't found any schools teaching
Python in their basic programming classes too.  On the dynamic typing,
isn't that the same sort of thing that lots of scripting languages
do?  VBScript doesn't require you to define your variables, but I
don't really want to use it for anything (used to use it a lot in
Classic ASP.)  I believe everyone that Python is great, but some of it
doesn't make sense to me as to why.  Thanks.


From ppearson at nowhere.invalid  Fri May  2 10:45:19 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Fri, 02 May 2008 09:45:19 -0500
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
Message-ID: <ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>

On Thu, 01 May 2008 16:45:51 -0500, Robert Kern <robert.kern at gmail.com> wrote:
>
> pyvtk is not the Python interface to VTK. It is for the
> creation of VTK files.  The vtk(1) command is a Tcl shell
> with the VTK libraries loaded (I believe).  Read the VTK
> documentation for information on the Tcl interface if you
> really want to use it. 

You're right: I don't really want to use it.

> The Python interface is also included in the VTK sources,
> although it might not have been built on your machine. You
> have to enable it when you build VTK itself. The Python
> interface is essentially the same as the C++
> interface. There are Python examples in the VTK source
> tree.

That's the ticket: I don't want to "import pyvtk", I
want to "import vtk" and ape /usr/share/vtk/.../*.py.

Thanks.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From jschroed at gmail.com  Mon May  5 19:34:32 2008
From: jschroed at gmail.com (John Schroeder)
Date: Mon, 5 May 2008 16:34:32 -0700
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
Message-ID: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>

Basically I have some classes like this:


###############################################################################
# 0x01: ModeCommand
###############################################################################
class ModeCommand:
    """This is the Mode Command Packet class."""
    def __init__(self, mode, command, id=0x01):
        """The unspecial init function."""
        self.mode = mode
        self.command = command
        self.id = id

    def RawData(self):
        return [self.id, self.mode, self.command]

    def __getitem__(self, index):
        """[] operator (read): indexes from the byte data."""
        return self.RawData()[index]

    def __str__(self):
        """Print a nice thing."""
        string = "Mode = %d\n" % self.mode + \
                 "Command = %d\n" % self.command + \
                 "ID = %d\n\n" % self.id
        return string

###############################################################################
# 0x02: CallRequest
###############################################################################
class CallRequest:
    """This is the Call Request Packet class.  (Look familiar?)"""
    def __init__(self, service_number, id=0x02):
        """The unspecial init function."""
        self.service_number = service_number
        self.id = id

    def RawData(self):
        return [self.id, self.service_number]

    def __getitem__(self, index):
        """[] operator (read): indexes from the byte data."""
        return self.RawData()[index]

    def __str__(self):
        """Print a nice thing."""
        string = "Service Number = %d\n" % self.service_number + \
                 "ID = %d\n\n" % self.id
        return string


###############################################################################
# Test Code
###############################################################################
x = ModeCommand(mode=1, command=0)
print x[:]
print x
y = CallRequest(service_number=2001)
print y[:]
print y


Which is ok but I had to do this over 100 times.  It is difficult to
maintain and no one else can understand what the heck I did here.  So I was
trying to look a metaclasses to do something fancy like this:

###############################################################################
# 0x01: ModeCommand
###############################################################################
PacketModeCommand = (
    ('name', "ModeCommand"),
    ('id', 0x01),
    ('action', 8), # size in bytes
    ('command', 8),
    )

###############################################################################
# Add some kind of class factory here: (metaclass, type(name, bases, dict)
-> a new type, ???)
###############################################################################
"""???"""


###############################################################################
# Add some kind of class factory here
###############################################################################
"""Hey this would be cool if I had a class just by making the dictionary."""
x = ModeCommand(mode=1, command=0)
print x[:]
print x


So that I could make a dictionary that would basically define my classes on
the fly.  This would be simple enough for everyone to maintain and would
make changes to the format of all the classes relatively simple.  (So far
the only way that I have thought of doing this is will a parsing script but
that would be lame.)

Of course, this becomes more and more complicated as my classes
(representing packets) start having objects of their own and functions that
need to be defined on the fly too... but for now I would be nice to know if
this idea is possible.  Thanks in advance.
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From paul.hankin at gmail.com  Fri May 23 11:33:56 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 23 May 2008 08:33:56 -0700 (PDT)
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <264b0b3b-e755-45f6-8e6f-9e853af9232a@c58g2000hsc.googlegroups.com>

On May 22, 7:21 pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> Is there an easy way to get a list comprehension to produce a flat list of,
> say, [x,2*x] for each input argument?
>
> E.g., I'd like to do something like:
>
> [ [x,2*x] for x in range(4) ]

[x * i for x in xrange(4) for i in xrange(1, 3)]

--
Paul Hankin


From mattheww at chiark.greenend.org.uk  Sun May 25 11:36:10 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 16:36:10 +0100 (BST)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
	<69tcmkF357g9nU1@mid.uni-berlin.de>
Message-ID: <gFl*AhMds@news.chiark.greenend.org.uk>

Diez B. Roggisch <deets at nospam.web.de> wrote:
>I don't see this as something that can be solved by ordering tests - 
>*especially* not on a per-method-level as the OP suggested, because I 
>tend to have test suites that span several files.

unittest already runs multiple test suites in the order you specify
(which is another clue that running tests in order is not evil).

I suspect unittest's choice of alphabetical order for the tests within
a suite is more an artefact of its original Java implementation than
anything else.

-M-


From Lie.1296 at gmail.com  Sun May 18 10:25:00 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 07:25:00 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <c6a0cff9-f0db-4104-95c2-01fa01739621@j33g2000pri.googlegroups.com>

On May 8, 2:06?pm, v4vijayakumar <vijayakumar.subbu... at gmail.com>
wrote:
> When I started coding in python, these two things surprised me.
>
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

The problem is in tab not Python, there is no convention on how many
spaces should tab be treated, python (by default) assumes a tab to be
equal to 8 spaces, but not everyone thinks the same, some code editor
might consider it as 4 spaces or 2 spaces. In most python-oriented
code editor, a tab might be automatically replaced with four spaces.

> 2. python requires to pass "self" to all instance methods

No, python doesn't requires self to be passed to all instance methods,
python passes the "current instance" of a class to the first argument
of a function inside the class, this first argument can be named
anything, although it is traditionally named as self. In other
programming languages, this current instance is implicitly passed (Me
in VB, this in C/C++).

> and I missed ":" often. :)

Not in your smiley though. :)


From ivan.illarionov at gmail.com  Sun May 11 00:26:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 11 May 2008 04:26:10 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <g05sh1$20fo$1@news.mtu.ru>

On Sat, 10 May 2008 18:12:37 -0700, globalrev wrote:

> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of both
> three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '') 
 or str(i) for i in xrange(1, 101)]

-- Ivan


From lists at cheimes.de  Sat May 17 17:05:19 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sat, 17 May 2008 23:05:19 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
Message-ID: <g0nhaf$ee7$1@ger.gmane.org>

Matthieu Brucher schrieb:
> Hi,
> 
> I did not manage to build extension with distutils with Python compiled with
> VS different than 2003. The need for 2003 was hard-coded in distutils.
> You can try building extensions with VS2008 with Scons. This is what I do a
> lot, and everything works fine as long as the interface does not use
> standard structures (like FILE, custom structures are fine) or objects
> allocated in the extension is freed in the extension.

Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
officially supported.

You can compile extensions with a different version of MS VC but it can
get you in a lot of trouble. Every version of the VS Compiler uses its
own C Runtime Library (MSVCRT). You can't share some resources like
allocated memory and FILE* objects between MSVCRTs.

Christian



From Lie.1296 at gmail.com  Wed May 14 00:51:05 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 21:51:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
Message-ID: <5ef77e00-7d9c-44fa-ad4c-dd2b57fe53c2@z16g2000prn.googlegroups.com>

On May 13, 11:36 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ... there's something that feels very unnatural about writing English as code.
>
> I think it is ironic that you think Flaming Thunder is unnatural
> because it is more English-like, when being English-like was one of
> Python's goals: "Python was designed to be a highly readable language.
> It aims toward an uncluttered visual layout, using English keywords
> frequently where other languages use punctuation."http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and...

Python was designed to be _highly readable language_. It aims toward
_uncluttered visual layout_, using _English keywords ... where other
languages uses punctuation_.

Where in that statement, that says Python aims to be English-like? It
only says Python uses English keywords instead of punctuations such as
curly braces, &&, ||, etc which is remotely far away from trying to be
English-like. What I see is that, FT in its current form, aims to be a
readable language, which doesn't concern itself for cluttering the
code's visual layout.

   Verbosity ? Readability

I even remembered someone saying that probably one of Python's goal is
to make you from press only the necessary keystrokes. If I don't
misremember it, it was in Thinking in Python.

> > Just using your "Set ... to" idiom, rather than a
> > regular = assignment, makes things much more wordy, without improving
> > readability.
>
> I think it does improve readability, especially for people who are not
> very fluent mathematically.

But it hurts readability for people who prefers simplicity over
everything and that means you've just violated KISS design principle
(Keep It Simple, Stupid) which is also a persistent feature in UNIX
philosophy (Small is beautiful, Rule of Simplicity), and Python's Zen
(Simple is better than Complex).

> Also, in Python how do you assign a symbolic equation to a variable?
> Like this?
>
> QuadraticEquation = a*x^2 + b*x + c = 0
>

Last time I checked, it was a syntax error there.

> Set statements avoid the confusion of multiple equal signs when
> manipulating symbolic equations:
>
> Set QuadraticEquation to a*x^2 + b*x + c = 0.
>

(snip)


From retreved at gmail.com  Tue May 20 14:53:39 2008
From: retreved at gmail.com (Mark d.)
Date: Tue, 20 May 2008 11:53:39 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>

How about:

mov = open(afile)
line = mov.readline()
...(process your ':' line)
for line in mov.readlines():
   ...


On May 20, 1:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?



From gagsl-py2 at yahoo.com.ar  Thu May  8 05:39:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 06:39:59 -0300
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>
	<8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com>
Message-ID: <op.uatw4xgwx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 07 May 2008 23:29:58 -0300, <clyfish at gmail.com> escribi?:

> On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
> wrote:
>> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>>
>> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
>> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
>> > print p2.stdout.read()
>>
>> > It doesn't work.
>> > Because subprocess.Popen execute "find" like this.
>>
>> > C:\>find \"445\"
>>
>> > It adds a '\' before each '"'.
>> > How to remove the '\'?
>> > Thank you.
>>
>> cannot help with the backslashes but try findstr instead of find
>
> Thank you.
> findstr doesn't need quotes, so it works.

Build the command line yourself -instead of using a list of arguments-. Popen doesn't play with the quotes in that case:

p1 = Popen(['netstat', '-an'], stdout = PIPE) # using list
p2 = Popen('find "445"', stdin = p1.stdout, stdout = PIPE) # using str
print p2.communicate()[0]

-- 
Gabriel Genellina



From none at this.time  Mon May 26 16:57:28 2008
From: none at this.time (Paul Miller)
Date: Mon, 26 May 2008 16:57:28 -0400
Subject: Tkinter = Rodney Dangerfield?
References: <dea2377d-5dca-47e1-a2d4-935bc051e993@34g2000hsz.googlegroups.com>
Message-ID: <3081d$483b2438$3799@news.teranews.com>

On Sun, 17 Feb 2008 11:35:35 -0800, MartinRinehart wrote:

> Tkinter gets no respect. But IDLE's a Tkinter-based app and every
> example I've Googled up shows Tkinter as needing about half as much code
> as wx to do the same job. I'm beginning to Tkinter up my language
> application. Am I making a big mistake?

I like Tkinter quite a bit.  I think it's relatively intuitive, and I 
like the Canvas and Text widgets a lot.

You might check out _Thinking in Tkinter_ at http://www.ferg.org/
thinking_in_tkinter/index.html .  

-- 
code.py: a blog about Python.  http://pythonista.wordpress.com
** Posted from http://www.teranews.com **


From miller.paul.w at gmail.com  Sun May 25 22:29:18 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:29:18 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<mailman.1589.1211766225.12834.python-list@python.org>
Message-ID: <4455e670-d3af-4f26-9eb4-51f46581d5d6@l42g2000hsc.googlegroups.com>

On May 25, 9:43?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> <miller.pau... at gmail.com> wrote in message
>
> news:d7549dfd-6770-4924-8f0c-1746642bd8a4 at k37g2000hsf.googlegroups.com...
> | Is there any place outside the actual C source for Python that has
> | information about the performance of Python's built-in operations?
>
> Unfortunately no. ?Guido does not want to put guarantees in the language
> definition, so there is no urgency to document this. ?An auxiliary doc
> might be accepted. ?But the people who could write such a thing are busy
> doing otherwise. ?Certainly, no one has volunteered to write *and update*
> such.

I see.  Just to be clear, though, I wasn't looking for "guarantees" as
such, like (I believe) the STL sometimes provides.  I was just looking
for some idea of what current implementations' performance
characteristics are.

I suppose I could probably create such a resource.  Keeping it updated
would be another thing entirely, since I don't really want to monitor
every single commit to Python's svn repository.  Hypothetically, if
someone made such a document, do you think it could be arranged for
that person to be notified whenever CPython's implementation changes
to invalidate it?


From dfnsonfsduifb at gmx.de  Fri May 23 18:59:58 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 00:59:58 +0200
Subject: Assignment and comparison in one statement
Message-ID: <esujg5x5u5.ln2@joeserver.homelan.net>

Hello group,

I'm just starting with Python and am extremely unexperienced with it so 
far. Having a strong C/C++ background, I wish to do something like

if (q = getchar()) {
	printf("%d\n", q);
}

or translated to Python:

if (p = myfunction()):
	print p

However, this "assignment and comparison" is not working. What's the 
"Python way" of doing this kind of thing?

Thanks a lot,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From bearophileHUGS at lycos.com  Tue May 20 09:24:02 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:24:02 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de> 
	<3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com>
Message-ID: <aaa0ef8c-e20e-420a-88e0-572c9697b47f@f63g2000hsf.googlegroups.com>

bearophile:
> So you need to store only this 11 byte long string to be able to
> decompress it.

Note that maybe there is a header, that may contain changing things,
like the length of the compressed text, etc.

Bye,
bearophile


From zapwireDASHgroups at yahoo.com  Thu May 22 16:53:16 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 13:53:16 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<5PjZj.78772$%15.70394@bignews7.bellsouth.net>
Message-ID: <33lZj.143344$Tj3.138473@en-nntp-02.dc1.easynews.com>

"inhahe" <inhahe at gmail.com> wrote in message 
news:5PjZj.78772$%15.70394 at bignews7.bellsouth.net...
> i figured out a solution
>
> sum([x,2*x] for x in range(4)],[]) #not tested

Nice... thanks; I probably had seen code using 'sum' to flatten but hadn't 
actually understood how it worked.  After playing around some it's now 
clear...

(Add one more opening bracket to your solution to make the interpreter 
happy -- I know you know this and it was missed only due to not actually 
trying it ought)

---Joel




From casey.mcginty at gmail.com  Thu May 15 04:32:01 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 14 May 2008 22:32:01 -1000
Subject: Making Variable Text Output More Pythonic?
Message-ID: <ae3f58470805150132t323d2360g42d11ed0292453d0@mail.gmail.com>

Hi,

I have some classes that print variable outputs depending on their internal
state, like so:

def __str__(self):
    out = []
    if self.opt1: out += ['option 1 is %s' % self.opt1']
    if self.opt2: out += ['option 2 is %s' % self.opt2']
    ....
    return '\n'.join(out)

Is there any way to make this cleaner?
-------------- next part --------------
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From nik600 at gmail.com  Tue May 27 08:18:46 2008
From: nik600 at gmail.com (nik600)
Date: Tue, 27 May 2008 14:18:46 +0200
Subject: integration with browser
In-Reply-To: <6a2bs6F35a5cmU1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<mailman.1638.1211878217.12834.python-list@python.org>
	<6a2bs6F35a5cmU1@mid.uni-berlin.de>
Message-ID: <9469c3170805270518p631c50acqfbb7713962a34f5a@mail.gmail.com>

On Tue, May 27, 2008 at 2:07 PM, Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Web developers usually check only 3 browser
>> IE
>> FF
>> Opera
>>
>> I know that using an external engine limits the portability of the
>> solutions, but i need something that works exaclty as the browser.
>
> You know that Webkit is the engine behind Safari? And one of the more
> compliant implementations out there - millions of mac-users only use
> Safari.
>
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>

No, i don't know that.

I'll test it immediatly, thanks ;-)

-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From nick at craig-wood.com  Tue May 20 04:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 03:30:05 -0500
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
	<69fbhgF2uih6aU5@mid.uni-berlin.de>
Message-ID: <slrng352qm.7sr.nick@irishsea.home.craig-wood.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
>  On Tue, 20 May 2008 13:57:26 +1000, James A. Donald wrote:
> 
> > The larger the program, the greater the likelihood of inadvertent name
> > collisions creating rare and irreproducible interactions between
> > different and supposedly independent parts of the program that each
> > work fine on their own, and supposedly cannot possibly interact.
> 
>  How should such collisions happen?  You don't throw all your names into
>  the same namespace!?

If you ever did a lot of programming in C with large projects you have
exactly that problem a lot - there is only one namespace for all the
external functions and variables, and macro definitions from one
include are forever messing up those from another.  I suspect the OP
is coming from that background.

However python doesn't have that problem at all due to its use of
module namespaces - each name is confined to within a module (file)
unless you take specific action otherwise, and each class attribute is
confined to the class etc.

>From the Zen of Python "Namespaces are one honking great idea -- let's
do more of those!" - as a battle scarred C programmer I'd agree ;-)

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From sjdevnull at yahoo.com  Fri May 16 13:46:58 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Fri, 16 May 2008 10:46:58 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>

On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
wrote:
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing
> of threads is a cardinal sin and although I have no particular threading
> problem to crack right now I remain interest in the taboo that is thread
> killing. The real world and it's data are messy and imperfect and I can
> think of several scenarios where it could be useful to be able to bump
> off a naughty thread, especially when using/testing unstable 3rd party
> modules and other code that is an unknown quantity.

When possible, use another process _especially_ for things like this.
That way you have more isolation between yourself and the unknown/
unstable code, and killing processes is well-understand and considered
less harmful (precisely because of the greater isolation).

In general, use processes when you can and threads only when you
must.  OS designers spent a lot of energy implementing protected
memory, no sense throwing out a fair chunk of that hard work unless
you actually need to.


From alex.m.gusarov at gmail.com  Thu May 29 07:58:10 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 18:58:10 +0700
Subject: Unit tests?
In-Reply-To: <m2hcch2vfj.fsf@googlemail.com>
References: <mailman.1728.1212060473.12834.python-list@python.org>
	<m2hcch2vfj.fsf@googlemail.com>
Message-ID: <ac6dcb3d0805290458h164222e0l505cf2d5fa06186@mail.gmail.com>

Thx, it's quite enough for a start.
Yes, googling is almost ultimate answer for such questions, sorry for
uneasiness.

> Try googling "python unit test".  I did it, and amongst the first hits
> were:
>
>    * docs.python.org/lib/module-unittest.html
>
>    * http://www.diveintopython.org/unit_testing/index.html
>
> --
> Arnaud


From dmitrey.kroshko at scipy.org  Wed May  7 16:13:40 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Wed, 7 May 2008 13:13:40 -0700 (PDT)
Subject: howto print binary number
Message-ID: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>

hi all,
could you inform how to print binary number?
I.e. something like

print '%b' % my_number

it would be nice would it print exactly 8 binary digits (0-1, with
possible start from 0)

Thank you in advance, D


From gagsl-py2 at yahoo.com.ar  Sun May  4 02:04:27 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 03:04:27 -0300
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <op.ual8hpznx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallower at invalid.com> escribi?:

> Hello,
>
> I made a function that takes a word list (one word per line, text file)
> and searches for all the words in the list that are 'shifts' of
> eachother.  'abc' shifted 1 is 'bcd'
>
> Please take a look and tell me if this is a viable solution.
>
>  def shift(word, amt):
> 	ans = ''
> 	for letter in word:
> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> 	return ans
>
> def fileshift(x):
> 	fin = open(x)
> 	d = {}
> 	for line in fin:
> 		d[line.strip()] = [1]
> 		for i in range(1, 26):
> 			ite = shift(line.strip(), i)
> 			if ite in d:
> 				print ite
>
>
> Any tips/suggestions/critiques greatly appreciated.. I'm trying to
> teach myself Python (and still beginning) and would love any helpful
> info.

First, looking at the code, you're evaluating line.strip() a lot of times; I'd avoid it.
Looks like you're using a dictionary just for the keys - the set type is more adequate here (see http://docs.python.org/lib/types-set.html ). In any case, I'd use a value like None instead of [1]
But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.

-- 
Gabriel Genellina



From maxm at mxm.dk  Tue May  6 05:43:49 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 06 May 2008 11:43:49 +0200
Subject: Python MIDI in 2008
In-Reply-To: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <48202855.4020905@mxm.dk>

Maciej Blizin'ski skrev:
> For the last couple of days, I've been looking for a Python midi
> library. I'm generally interested in sending MIDI events via ALSA. It
> seems like everything out there is pretty old; packages are from 2003
> or 2005.

> existing or very old software packages
> - http://www.mxm.dk/products/public/pythonmidi/ -- no realtime support


This is old in the sense that it has been a while since I wrote it. But 
it is virtually bug free, so nothing much is happening.

The midi standard does not change so there is no real reason to 
change/upgrade it.

It is currently being used by the very popular "frets on fire"

http://fretsonfire.sourceforge.net/documentation/source/


It does not have real time support even though I did write it with that 
support in mind. I just never got around to write it as I did not need 
it myself.


I also developed it on Windows and I found it to be a bore to get real 
time midi working.

It would probably be easier now that I am on Linux.


Well I just thought I would mention that it is not dead. Merely middle aged.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From tjreedy at udel.edu  Tue May 27 23:30:51 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 23:30:51 -0400
Subject: When was feature FOO added to Python? (was: decorators when?)
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<87zlqbs60b.fsf@benfinney.id.au>
Message-ID: <g1ijla$5dt$1@ger.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:87zlqbs60b.fsf at benfinney.id.au...
| David C. Ullrich <dullrich at sprynet.com> writes:
|
| > What version added decorators (using the @decorator syntax)?
| >
| > (Is there a general way I could have found out the answer myself?)
|
| For standard library features, the documentation for a module
| <URL:http://www.python.org/doc/lib/> usually says "(New in 2.4)" or
| "(Changed in 2.4)" or the like for features that appeared in a
| particular version. I think this is manually done by the
| documentation maintainers, though.
|
| For features of the language (like decorators), the language reference
| <URL:http://www.python.org/doc/ref/> is the place that *describes* the
| features; but I don't see any similar "(New in 2.4)" annotations, so
| e.g. <URL:http://www.python.org/doc/ref/function.html> doesn't mention
| when the decorator syntax appeared in the language.
|
| Any documentation maintainers reading: Please consider updating the
| documents to give this useful "(New in 2.x)" or "(Changed in 2.x)"
| annotation for just such a situation.
|
| You can get closer to the answer by browsing the "What's New in
| Python" <URL:http://www.python.org/doc/2.4/whatsnew/> documents by
| version.

Missing 'New' or 'Changed' annotations might be considered doc bugs. 
Certainly there should be one for decorators.  Anyone who wants such 
omissions fixed should file a report on bugs.python.org listing the 
*specific* annotations you think should be added and where.  Cite which 
documents you used as sources so they can be checked.  This is something 
that a new volunteer could do, since it does not need the special skill of 
older volunteers.

Note 1: probably best to check against 2.6 docs, as I am not sure that 
fixes will go back 2.5.

Note 2: the 3.0 docs start with a 'clean slate'.  All such annotations are 
or should be wiped.  But changes in 3.1 will be annotated as usual.

TJR





From usenet1.3.CalRobert at SpamGourmet.Com  Thu May  8 06:25:54 2008
From: usenet1.3.CalRobert at SpamGourmet.Com (Robert Maas,)
Date: Thu, 08 May 2008 03:25:54 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <rem-2008may08-005@yahoo.com>

> From: "xah... at gmail.com" <xah... at gmail.com>
> the importance of naming of functions.

I agree, that's a useful consideration in the design of any system
based on keywords, such as names of functions or operators.
(I'm not using "keyword" in the sense of a symbol in the KEYWORD package.)

> the naming in Mathematica, as Stephen Wolfram implied in his blog
> above, takes the perspective of naming by capturing the essense, or
> mathematical essence, of the keyword in question.

For concepts adapted from mathematics, that naming meta-convention makes sense.
For concepts adapted from data-processing, it's not so clearly good.

> lambda, widely used as a keyword in functional languages, is
> named just Function in Mathematica.

That makes sense, but then what does Mathematica call the special
operator which Common Lisp calls Function? Or is that not provided,
and the programmer must case-by-case handcode what they really mean?
(function foo) == (symbol-function 'foo) ;so FUNCTION not really needed there
(function (lambda (x) (+ x y)) ;y is a lexical variable to be encapsulated
                               ; into the resultant closure
How would you do something like that in mathematica?

> Module, Block, in Mathematica is in lisp's various let*
> The lisp's keywords let, is based on the English word let.

No, that's not correct. It's based on the mathematical use of "let":
Let R be the complete ordered field of real numbers.
Let S be the subset of R consisting of numbers which satisfy
  equations expressed in transcendental functions with rational
  parameters.
Prove that S is dense in R.
(Yeah, the question is trivial, but I'm just showing how "let" might be used.)

I see nothing wrong with LET used in that way in Lisp.
Bind would be good too.
I don't like Module or Block at all, because those words convey
nothing about binding some temporary local name to represent some
globally-definable concept, and they actually mis-lead because
module can mean either something like a vector space over a ring,
or a set of functions/methods that serve some small problem domain
within a larger library of functions/methods, or a set of lectures
on a single-topic within a curriculum, while Block sounds more like
just some random consecutive interval of statements rather having
nothing specific to do with bindings. TAGBODY or PROGN would be
more properly called Block perhaps.

> One easy way to confirm this, is taking a keyword and ask a wide
> audience, who doesn't know about the language or even unfamiliar of
> computer programing, to guess what it means.

That is a biassed question because the only options are the words
you choose in advance. Better would be to reverse the question: Ask
random people on the street what they would like to call these
concepts:
1 You set up a temporary relation between a name and some datum,
   such that all references to that name give you that same datum.
   For example you might set up the name 'n' to temporarily mean 5.
   Fill in the missing word: (word (n 5) <say "ouch" n times>)
2 You set up a rule by which one step of data-processing is performed,
   taking input to produce output. For example you set up a rule by
   which the input value is divided by two if it's even but
   multiplied by three and then 1 added if it was odd.
   Fill in the missing word: (word (n) <if n even n/2 else 3*n+1>)
3 You set up a rule as above, but also give it a permanent name.
   Fill in the missing word: (word collatz (n) <if n even n/2 else 3*n+1>)
4 You already have a rule that takes two input data and produces one output.
     (oldword foo (x y) <absolute value of difference between x and y>)
   You now know one of the two inputs, and that info won't change for a while,
   and you hate to keep repeating it. So you want to define a new rule
   that has that one known parameter built-in so that you only have
   to say the *other* parameter each time you use the new rule.
   Fill in the missing newword: (newword foo <x is fixed as 3>)
So I'd choose words: 1=let 2=lambda 3=defun 4=curry.
What words would a typical man on the street choose instead?

> The name regex has done major hidden damage to the computing industry

I have my own gripe against regular expressions ("regex" for short).
I hate the extremely terse format, with horrible concoctions of
escape and anti-escape magic characters, to fit within Unix's
255-character limit on command lines, compared to a nicely
s-expression nested notation that would be possible if regex hadn't
entrenched itself so solidly.


From PatrickMinnesota at gmail.com  Wed May 14 20:53:30 2008
From: PatrickMinnesota at gmail.com (PatrickMinnesota)
Date: Wed, 14 May 2008 17:53:30 -0700 (PDT)
Subject: Passing functions around and executing
Message-ID: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>

I've been reading the docs and looking for an answer and seem stuck.
I'm either not looking in the right places or not understanding what
I'm reading.

I have a bunch of functions.  I want to put them in a list.  Then I
want to pass that list into another function which does some setup and
then loops through the list of passed in functions and executes them.
Some of them need arguments passed in too.

Can someone point me to where to read about this?  I know it's do-able
since it's basically doing something like a callback would do.

Thanks for any pointers.


From __peter__ at web.de  Fri May 30 11:41:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 May 2008 17:41:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <g1p781$2j1$00$1@news.t-online.com>

Josep wrote:

> I'm playing with an application framework (or kinda) that's developed
> with python, and it throws this error:
> 
> 
>> File
>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>> line 281, in execute
>>     sql = unicode(sql, self.Encoding)
>> LookupError: unknown encoding: utf_8_euro
> 
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue. As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.
> 
> My Python version is 2.5.2, Ubuntu Hardy .deb package.

Python might get confused by an @EURO suffix in the locale:

$ LANG=de_DE.UTF-8 at EURO
$ python -c"import locale; print locale.getdefaultlocale()"
('de_DE', 'utf_8_euro')

Try setting the LANG environment variable to something like

$ LANG=de_DE.UTF-8
$ python -c"import locale; print locale.getdefaultlocale()"
('de_DE', 'UTF8')

before you run your program (use ca_ES or whatever you need instead of
de_DE).

Peter


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 08:23:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 14:23:34 +0200
Subject: default object comparison considered harmful?
In-Reply-To: <ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <482d7cc6$0$10756$426a34cc@news.free.fr>

Kay Schluehr a ?crit :
> On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> Hello all,
>>
>> Yesterday we found the cause of a bug that has caused problems for a long time.
>> It appeared to be the following:
>>
>> class A(object):
>>     pass
>>
>> print min(1.0, A())
>>
>> which is accepted by Python even though the A() object is not numerical in
>> nature.
>>
>> The cause of this behavior seems to be the compare operation of the object
>> class.
>>
>> Is there a way to disable this behavior in Python (other than deriving a new
>> 'object-like' class that doesn't do comparisons?)
>>
> Are you sure you don't want to use a statically typed language that
> captures all type errors just by inspecting your source code?

This is not necessarily a static vs dynamic typing problem. The 
following code will raise a TypeError for very good reasons:

    print 1.0 + A()


From jorge.vargas at gmail.com  Tue May  6 05:07:53 2008
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Tue, 6 May 2008 05:07:53 -0400
Subject: config files in python
In-Reply-To: <482017EA.40706@egenix.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
	<482017EA.40706@egenix.com>
Message-ID: <32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>

On Tue, May 6, 2008 at 4:33 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>
> On 2008-05-06 01:16, Matimus wrote:
>
> > On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
> >
> > > Hi,
> > >  In my application, I have some configurable information which is used
> > > by different processes. currently I have stored configration in a
> > > conf.py file as name=value pairs, and I am importing conf.py file to
> > > use this variable. it works well
> > >
> > > import conf
> > > print conf.SomeVariable
> > >
> > > but if I need to change some configuration parameteres,  it would need
> > > me to restart processes.
> > >
> > > I want to store this data in some conf file (txt) and would like to
> > > use it same way as I am using these variables as defined in py
> > > files.
> > >
> > > one solution I can think of is writing data as a dictionary into conf
> > > file. and then by reading data, apply eval on that data. and update
> > > local dict? but this is not a good solution....
> > >
> > > any pointers?
> > >
> > > Sandip
> > >
> >
> > I would load the configuration file using `imp.load_source'. This
> > allows you to load the config file by filename, and gets away from the
> > issue of accidentally importing a file somewhere else in pythons
> > search path. Also, calling imp.load_source will reload the module when
> > called a second time.
> >
>  >
>
> > http://docs.python.org/lib/module-imp.html
> >
>
>  Why not just use execfile() ?
>
>  http://www.python.org/doc/2.2.3/lib/built-in-funcs.html
>
that is very bad for this case, from what he is suggesting this is a
server install so you are basically giving a vector of remote code
execution (same with the first approach) but then execfile has the
issue that it goes into your current namespace possibly creating a
namespace crash which is even worst because an attacker can shallow
say your auth module with something that will just return.
>
>
>
> > [conf.py]
> > a = 1
> > b = 2
> > class c:
> >    a = "hello"
> >    b = "world"
> > [/end conf.py]
> >
> >
> > >
> > > >
> > > > > conf = imp.load_source("conf", "./conf.py")
> > > > > conf.a
> > > > >
> > > >
> > >
> > 1
> >
> > >
> > > >
> > > > > conf.b
> > > > >
> > > >
> > >
> > 2
> >
> > >
> > > >
> > > > > conf.c.a
> > > > >
> > > >
> > >
> > 'hello'
> >
> > >
> > > >
> > > > > conf.c.b
> > > > >
> > > >
> > >
> > 'world'
> >
> >
> >
> > There are so many ways potential solutions to your problem that,
> > without any more details, it is hard to suggest anything.
> >
> > Here are some potential solutions:
> >
> > ConfigParser - module for handling ini files
> > xml - several built-in modules for handling XML files
> > sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
> > for config data)
> > windows registry  - _winreg module
> > pickle - serialize python objects
> > marshal - similar to pickle, only works for simple objects
> >
> > Those are just the built-in solutions. If you wanna look at 3rd party
> > solutions, prepare for overload. The number of alternative INI parsers
> > alone is staggering.
> >
> > Also, there are many ways to organize your data and use a solution
> > similar to what you are already using.
> >
> > I guess what I'm trying to say is... don't roll your own, it would be
> > a waste of time, this problem has been solved 100s of times. That is,
> > unless you want to do it for fun.
> >
> > Matt
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>  --
>  Marc-Andre Lemburg
>  eGenix.com
>
>  Professional Python Services directly from the Source  (#1, May 06 2008)
>  >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>  >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>  >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
>  ________________________________________________________________________
>
>  :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>
>
>    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>            Registered at Amtsgericht Duesseldorf: HRB 46611
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From renesd at gmail.com  Fri May  2 05:47:26 2008
From: renesd at gmail.com (illume)
Date: Fri, 2 May 2008 02:47:26 -0700 (PDT)
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C 
	libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com> 
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
	<mailman.437.1209681507.12834.python-list@python.org>
Message-ID: <86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>

On May 2, 8:37?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "illume" <ren... at gmail.com> wrote in message
>
> news:372ae26a-d772-4182-aa4b-64330626d60f at l25g2000prd.googlegroups.com...
> | Ah, why is that?
>
> Were any of the reasons given inhttp://www.python.org/dev/peps/pep-0011/
> unclear?
> It appears you are already aware of MS's non-support of Win98


Hello,

It seems the main reason is for ease of maintenance.  However the Pep
title is misleading with regards to win9x+winMe+win2k - which is where
my confusion, questions and argument came from.
"Title: 	Removing support for little used platforms"

There are still *lots* of people who still use win95, 98, 98se, me,
and win2k - as shown by the statistics I linked to in a previous
post.  If you want more statistics about the number of people using
what OS they are fairly easy to find with a search engine.  One day
win9x will be finally dead, but that's not yet(and the w3c stats show
it's usage actually increasing in march!).

It is probably way too late in the process to put back code - and as
you say no python developers have volunteered.  So I won't argue any
more for it to come back.

We'll just have to recommend a different python implementation than
2.6 or 3.0 for people who want to support people with these old
computers.


cheers,


From deets at nospam.web.de  Tue May 13 10:46:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 16:46:32 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <68tnvfF2t99pnU1@mid.uni-berlin.de>

Dave Parker wrote:

>> Don't let yourself be irritated by castironpi
> 
> I'm not the sort to get irritated by anyone.  There is value in all
> interaction.  Flaming Thunder is itself the averaging of interactions
> with many computer languages and conversations with many people, so as
> to create a language that allows people to tell a computer what they
> want it to do, without having to know very much about how the computer
> does it.
> 

Well, if your actual goal is to create traffic to promote your own product
(I presume so from your mailaddress) then I'm not surprised that you not
*really* care who is responding how... 

Diez


From darcy at druid.net  Wed May 28 06:43:10 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 28 May 2008 06:43:10 -0400
Subject: A quick question
In-Reply-To: <g1jbtt+bf6m@eGroups.com>
References: <g1jbtt+bf6m@eGroups.com>
Message-ID: <20080528064310.6b2d4f6e.darcy@druid.net>

On Wed, 28 May 2008 10:25:01 -0000
"James" <cobrocks at msn.com> wrote:
> Hey everyone,
> 
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  
> How can I get these integers to print as letters?  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  

Ignore my previous message.  Too early.  Here is your script:

word = raw_input("Type a word:")
for i in range(len(word), 0, -1):
    print word[i]

Sorry about that.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From vijayakumar.subburaj at gmail.com  Fri May  9 09:37:30 2008
From: vijayakumar.subburaj at gmail.com (v4vijayakumar)
Date: Fri, 9 May 2008 06:37:30 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
Message-ID: <53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>

On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> v4vijayakumar a ?crit :
>
> > When I started coding in python, these two things surprised me.
>
> > 1. my code is inconsistently indented with the combination of tabs and
> > spaces. Even lines looked intended, but it is not.
>
> Then you have a problem with your code editor - not with Python.
>

Editors can not be wrong. :)

I think there should be some way to say python compiler, to consider
tab and two blank spaces equal, when tab space = 2.


From kyosohma at gmail.com  Fri May  9 10:25:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:25:40 -0700 (PDT)
Subject: Can I "delete" the namespace of a module that i import?
References: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>
Message-ID: <1072bcd6-b30b-4e51-b79a-f7e9cfd80976@e39g2000hsf.googlegroups.com>

On May 9, 9:06?am, "gbin,Zhou" <scutee... at gmail.com> wrote:
> Hi,all.
> ? ?I see from "http://docs.python.org/tut/node11.html" that "Name
> spaces are created at different moments and have different lifetimes.
> The namespace containing the built-in names is created when the Python
> interpreter starts up, and is never deleted. The global namespace for
> a module is created when the module definition is read in; normally,
> module namespaces also last until the interpreter quits."
> ? ?So can I "delete" the namespace of a module that i import?
> ? ?thanks.

I did some searching and haven't found much. The closest I've found so
far is this old thread:

http://mail.python.org/pipermail/python-list/2000-February/022526.html

You might look at IDLE's code to see what it does when you tell it to
"restart" too.

Good luck!

Mike


From deets at nospam.web.de  Wed May 28 15:52:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 21:52:26 +0200
Subject: Threads and import
In-Reply-To: <0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
Message-ID: <6a5rfvF36c899U1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> rsoh.woodho... at googlemail.com schrieb:
>>
>>
>>
>>> Hi,
>>> I'm trying to work out some strange (to me) behaviour that I see when
>>> running a python script in two different ways (I've inherited some
>>> code that needs to be maintained and integrated with another lump of
>>> code). The sample script is:
>>> # Sample script, simply create a new thread and run a
>>> # regular expression match in it.
>>> import re
>>> import threading
>>> class TestThread(threading.Thread):
>>>     def run(self):
>>>         print('start')
>>>         try:
>>>             re.search('mmm', 'mmmm')
>>>         except Exception, e:
>>>             print e
>>>         print('finish')
>>> tmpThread = TestThread()
>>> tmpThread.start()
>>> tmpThread.join()
>>> import time
>>> for i in range(10):
>>>     time.sleep(0.5)
>>>     print i
>>> # end of sample script
>>> Now if I run this using:
>>> $ python ThreadTest.py
>>> then it behaves as expected, ie an output like:
>>> start
>>> finish
>>> 0
>>> 1
>>> 2
>>> ...
>>> But if I run it as follows (how the inherited code was started):
>>> $ python -c "import TestThread"
>>> then I just get:
>>> start
>>> I know how to get around the problem but could someone with more
>>> knowledge of how python works explain why this is the case?
>> Works for me. And I don't see any reason why it shouldn't for you -
>> unless you didn't show us the actual code.
>>
>> Diez
> 
> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> on Ubuntu 7.10. Which version of python/what platform were you using?

mac-dir:/tmp deets$ python
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>>


But I doubt this changes anything.

Diez


From arnodel at googlemail.com  Tue May 20 13:12:14 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 18:12:14 +0100
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <m2lk247vdd.fsf@googlemail.com>

Zack <zhalbrecht at gmail.com> writes:

> Given a bunch of objects that all have a certain property, I'd like to
> accumulate the totals of how many of the objects property is a certain
> value. Here's a more intelligible example:
>
> Users all have one favorite food. Let's create a dictionary of
> favorite foods as the keys and how many people have that food as their
> favorite as the value.
>
> d = {}
> for person in People:
>     fav_food = person.fav_food
>     if d.has_key(fav_food):
>         d[fav_food] = d[fav_food] + 1
>     else:
>         d[fav_food] = 1

This is fine.  If I wrote this, I'd write it like this:

d = {}
for person in people:
    fav_food = person.fav_food
    if fav_food in d:
        d[fav_food] += 1
    else:
        d[fav_food] = 1

You can use d.get() instead:

d = {}
for person in people:
    fav_food = person.fav_food
    d[fav_food] = d.get(fav_food, 0) + 1

Or you can use a defaultdict:

from collections import defaultdict
d = defaultdict(int) # That means the default value will be 0
for person in people:
    d[person.fav_food] += 1

HTH

-- 
Arnaud


From salgerman at gmail.com  Tue May 13 09:23:33 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 06:23:33 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
Message-ID: <3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>


hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
the packages I was using because they were in the "egg" form.  I was
hoping Installer could...then again, I don't know how long ago
Installer was written and whether eggs came along after that...

Regarding the word 'copy'...will you please enlighten me? were you
serious? is it really banned (around here)? I mean, I thought we were
talking about an open application which, for as long as you pass along
the (GNU,GPL) license, you are allowed to provide it to other people.

So, then, allow me to ask the real question:  how do I go about
deploying a Python application to somebody who has nothing (python nor
related modules) where my application uses modules from Lib/site-
packages that are in "egg" form?

Regards,

gsal


From mishok13 at gmail.com  Wed May  7 03:54:40 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Wed, 7 May 2008 10:54:40 +0300
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <48215537.100@promsoft.ru>
References: <48215537.100@promsoft.ru>
Message-ID: <192840a00805070054o22eb17ach519098da27258269@mail.gmail.com>

2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
> Subj is bag?
>
>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
> (Intel)] on win32
>  Type "help", "copyright", "credits" or "license" for more information.
>  >>> from datetime import datetime
>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>  '2008_05_07 12_30_22.csv'
>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>  Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>  TypeError: strftime() argument 1 must be str, not unicode

Unicode and str objects are not the same. Why do you think that this
is a bug? Anyway, you can always use 'encode' method of unicode
objects:

In [2]: datetime.today().strftime('%Y-%m-%d %H-%M-%S.csv')
Out[2]: '2008-05-07 10-49-24.csv'

In [3]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv')
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)

/home/mishok/doc/python/<ipython console> in <module>()

TypeError: strftime() argument 1 must be str, not unicode

In [4]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv'.encode('utf-8'))
Out[4]: '2008-05-07 10-51-19.csv'

No offence, but have you read the tutorial?

>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From florencio.cano at gmail.com  Thu May  8 03:14:24 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Thu, 8 May 2008 09:14:24 +0200
Subject: How to gather information about the system hardware?
Message-ID: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>

Hi,
I'm looking for a method of gathering information about the system
hardware and software installed using Python. I would like to do it in
UNIX and in Windows. I think that it would be good in Windows to look
in the registry and be able to parse and search it. Any pointer to
information would be appreciated.
Thanks.


From workitharder at gmail.com  Tue May 27 17:49:12 2008
From: workitharder at gmail.com (bukzor)
Date: Tue, 27 May 2008 14:49:12 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
	<p%EZj.19189$255.2014@bignews8.bellsouth.net>
	<ce386e5a-514e-4faf-a679-138f14f9a7e4@t54g2000hsg.googlegroups.com>
Message-ID: <4787d8f0-c147-4a6a-8cc7-e354ce41a33a@j22g2000hsf.googlegroups.com>

On May 23, 1:17 pm, bukzor <workithar... at gmail.com> wrote:
> On May 23, 12:35 pm, "inhahe" <inh... at gmail.com> wrote:
>
>
>
> > "
> > I wish this worked:>>> def main(a,b,*argv): pass
> > >>> options['argv'] = argv
> > >>> main(**options)
>
> > TypeError: main() got an unexpected keyword argument 'argv'
> > "
> > -----
> > I was thinking about that exact same thing actually.  Except that I was
> > thinking you might want it like this, otherwise it could be ambiguous:
>
> > >>> def main(a,b,*argv): pass
> > >>> options['*argv'] = argv
> > >>> main(**options)
>
> > Weird I know, to put the * operator inside the string.  I suppose the
> > necessity of doing that just shows why it wasn't implemented in the first
> > place.  But still, it would be neat...
>
> > Also, of course, you could then do
> > main(*argv=[2,3])
>
> > or rather
>
> > main(*argv=[3,4],a=1,b=2) #in random order
>
> Yes I think something like that would be an improvement. I wonder if
> anyone would help me write a PEP... It might not be too hard to pass
> since it would be compatible with all existing code. I'd be willing to
> produce a patch against python2 or py3k.
>
> I don't see that leaving off the * makes it ambiguous, since there can
> only be one argument with that name:
> def f(args, *args): pass
> SyntaxError: duplicate argument 'args' in function definition

I guess that's a no...


From casey.mcginty at gmail.com  Wed May 21 06:44:50 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 21 May 2008 00:44:50 -1000
Subject: Organizing a Python project
In-Reply-To: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>

> I'm starting work on what is going to become a fairly substantial
> Python project, and I'm trying to find the best way to organize
> everything.


I'd like to add a follow up question.  Are there any idioms for writing
/usr/bin scripts to run installed package modules? For this I am assuming a
simple case where there is a single package with one or more modules all
making up a single application. A have a few thoughts, please correct me if
I'm wrong.

1. Script code should be as basic as possible, ideally a module import line
and function or method call. This is so you don't have to worry about script
errors and/or increase startup time because a *.pyc file can not be store in
/usr/bin.

2. In the top of your package directory it is typical to have a module name
'_package.py'. This is ideally where the main command line entry point for
the package code should be placed.

3. In the _package.py file you should add a "class Package" that holds most
or all of the application startup/execution code not designated to other
modules. Then run the application with the call to "Package()", as in

    if __name__ == '__main__':
       Package()

Some other questions I have are:
A. What should go in the package __init__.py file? For example, a doc
describing the program usage seems helpful, but maybe it should have info
about your modules only? Assuming the __init__.py code gets executed when
you import the module, you could place part or all of the application code
here as well. I'm guessing this is not a good idea, but not really
convinced.

B. How should you import your _package.py module into your /usr/bin script.
Is there a way to use an '__all__' to simplify this? Again this goes back to
question A, should there be any code added to __init__.py?

C. If you have a _package.py file as the application entry, is it worth it
to place most of the application code in a class, described in part 3?

D. When I import a package._package module, I get a lot of junk in my
namespace. I thought an '__all__' define in the module would prevent this,
but it does not seem to work.

Thanks for reading,
- Casey
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From bruno.desthuilliers at gmail.com  Wed May 14 17:41:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:41:58 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
Message-ID: <45b8aef5-50d9-4b83-98c0-104dddd03d26@y38g2000hsy.googlegroups.com>

On 13 mai, 18:36, Dave Parker <davepar... at flamingthunder.com> wrote:
(snip)

> Also, in Python how do you assign a symbolic equation to a variable?
> Like this?
>
> QuadraticEquation = a*x^2 + b*x + c = 0

quadratic_equation = lambda x, b, c : a*(x**2) + b*x + c == 0

or if x, b and c are supposed to be captured from the current
namespace:

quadratic_equation = lambda : a*(x**2) + b*x + c == 0

> Set statements avoid the confusion of multiple equal signs when
> manipulating symbolic equations:

using '=' for assignement and '==' for equality test does the same
thing. And it's a very common pattern in programming languages.



From hdante at gmail.com  Tue May 13 10:34:09 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 07:34:09 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
Message-ID: <7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>

On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > Don't let yourself be irritated by castironpi
>
> > I'm not the sort to get irritated by anyone. ?There is value in all
> > interaction.
>
> Not this interaction, I'm afraid. ?What irritates *me* about
> castironpi is that he uses a chatterbot to clutter up the threads
> here. ?If you go back to his postings from a year ago (and selected
> ones since), his comments are coherent and sensible. ?These rambling
> stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> his idea of a joke. ?But they are certainly not worth your time in
> trying to respond to them.
>
> -- Paul

 I don't think castironpi so annoying that I should filter its
messages. It would be enough if he were better tuned. He is much
smarter than the emacs shrink, for example. :-P

 The "Flaming Thunder" looks promising, but without being free
software, it's unlikely it will create a large developer community,
specially considering both free general purpose and scientific
programming languages.


From johnjsal at NOSPAMgmail.com  Mon May 12 23:42:43 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:42:43 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
Message-ID: <48290e33$0$11631$607ed4bc@cv.net>

Martin v. L?wis wrote:

> OTOH: do you plan to do any programming at all, in your
> life? If yes: consider using Python for every programming
> task you'll encounter

Yeah, I do plan to use it for fun (if I can think of little projects to
work on!), and Python is definitely the only language I care to learn.
It's simple and fun to use, which is why I hate that I don't have more
reasons to use it! :)


From aguirre.adolfo at gmail.com  Sun May  4 18:01:06 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Sun, 4 May 2008 15:01:06 -0700 (PDT)
Subject: Can I install Python 2.4 and 2.5 ?
Message-ID: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>

I am reviewing various visualization programs (Scipy, PYGNL, etc) and
IDE?s. Some run on Python 2.4 others in 2.5.

Can I have both installed at the same time if I don?t run them
concurrently?

Now in Windows XP soon on Ubuntu 8

Appreciating your help,

Adolfo


From duncan.booth at invalid.invalid  Sun May 18 08:57:04 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 May 2008 12:57:04 GMT
Subject: secret code?
References: <5bc52ed9-855e-4569-b3bd-a0c1ab6941d7@k37g2000hsf.googlegroups.com>
Message-ID: <Xns9AA28DEDE6E93duncanbooth@127.0.0.1>

Sanoski <Joshuajruss at gmail.com> wrote:

> What would you guys says about this secret code? The key was
> apparently lost. The guy never sent it, and he was never seen again.
> It must stand for letters in the alphabet, but it almost looks like
> trajectory tables. I don't know. What do you guys think?
> 
> http://i243.photobucket.com/albums/ff273/ezname420/code.jpg
> 
Try Googling for 'Beale Cipher'.


From mario at ruggier.org  Sat May 31 06:57:56 2008
From: mario at ruggier.org (Mario Ruggier)
Date: Sat, 31 May 2008 12:57:56 +0200
Subject: ValueError: unknown locale: UTF-8
Message-ID: <305017A1-F5F5-47E2-BB20-0B2A1FD4C5E8@ruggier.org>

On OS X 10.5.2 :

$ python
Python 2.5.1 (r251:54863, Feb  4 2008, 21:48:13)
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import locale
 >>> locale.getdefaultlocale()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/locale.py", line 441, in getdefaultlocale
     return _parse_localename(localename)
   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/locale.py", line 373, in _parse_localename
     raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: UTF-8
 >>>

This is on open bug or is there more to it?

Regards, mario


From wizzardx at gmail.com  Sun May  4 17:12:13 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 23:12:13 +0200
Subject: unicode newbie - printing mixed languages to the terminal
Message-ID: <18c1e6480805041412s37085709q511eb3a3c86e36c5@mail.gmail.com>

Hi list.

I've never used unicode in a Python script before, but I need to now.
I'm not sure where to start. I'm hoping that a kind soul can help me
out here.

My current (almost non-existant) knowledge of unicode:

>From the docs I know about the unicode string type, and how to declare
string types. What I don't understand yet is what encodings are and
when you'd want/need to use them. What I'd like is to just be able to
print out unicode strings in mixed languages, and they'd appear on the
terminal the same way they get shown in a web browser (when you have
appropriate fonts installed), without any fuss.

Here is an example of how I'd like my script to work:

$ ./test.py

Random hiragana: <some jp characters>
Random romaji: kakikukeko

Is this possible?

>From my limited knowledge, I *think* I need to do to things:

1) In my Python script, run .encode() on my unicode variable before
printing it out (I assume I need to encode into Japanese)

Question: How does this work when you have multiple languages in a
single unicode string? Do you need to separate them into separate
strings (one per language) and print them separately?

Or is it the case that you can (unlike a web browser) *only*
display/print one language at a time? (I really want mixed language -
English AND Japanese).

2) Setup the terminal to display the output. From various online docs
it looks like I need to set the LANG environment variable to Japanese,
and then start konsole (or gnome-terminal if that will work better).
But again, it looks like this limits me to 1 language.

If what I want to do is very hard, I'll output html instead and view
it in a web browser. But I'd prefer to use the terminal instead if
possible :-)

Thanks in advance.

David.


From notontheweb at noisp.com  Wed May  7 23:22:12 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 03:22:12 GMT
Subject: web client in Python Q
In-Reply-To: <mailman.732.1210209312.12834.python-list@python.org>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
	<mailman.732.1210209312.12834.python-list@python.org>
Message-ID: <DluUj.663832$us.393032@fe04.news.easynews.com>

Thanks, Jerry!  That's so cool.  I actually managed to blunder through 
with sockets and so forth, but this is much cleaner.

I wonder why it does not work with

  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW

I get a connection reset by peer error.


From notbob at nothome.com  Tue May  6 14:07:51 2008
From: notbob at nothome.com (notbob)
Date: Tue, 06 May 2008 18:07:51 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>
Message-ID: <X71Uj.15556$pI4.12568@fe101.usenetserver.com>

On 2008-05-06, Jeffrey Froman <jeffrey at fro.man> wrote:

> Nice to see another Slackware user around here!

Likewise.  ;)


> That's correct. A function doesn't generally *do* anything until it is
> called. Here, it is only defined. The only thing this function does when
> called is to print the value of bruce twice.

I suspected as much.  It was a bit confusing, but I get it now.  


> Functions are objects too, and this is a printed representation of that
> function object. It still hasn't been "called" at this point.

Good to know.  Thnx.   


> other python "special" attributes, it starts and ends with TWO underscores.

...as Alex also pointed out.  I didn't notice that.  Thnx.


> You are correct to create this script yourself from scratch.

Do python scripts require the:

 #!/usr/bin/env python
 
....line at the beginning of every script or just the .py file extension?  I
see examples both ways, with and without.


> Your module files, i.e., chap03.py, should be in one of the directories on
> that path.

Gotchya.   

> "from" modifies a *module* name, not a path component. So "from module
> import one_function, another_function". This allows you to use one_function
> without referencing it through the imported module name. In other words,
> these two are equivalent:
>
>>>> import chap03
>>>> chap03.print_twice()
>
> and:
>
>>>> from chap03 import print_twice
>>>> print_twice()
>
> In the above examples, "chap03" is the *module* file, chap03.py.

mmmmm..... that's still a bit much to wrap my feeble brain around, but I get
your drift.  I'm still working on the basic function concept as python uses
it.  But, I found two more websites that explain it better and I think I
pretty much get it, now.  Thank you, and the others, for your help.  It's
very much appreciated.  

nb

Slackware:  simplicity through transparency



From Joshuajruss at gmail.com  Sat May 17 00:43:46 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Fri, 16 May 2008 21:43:46 -0700 (PDT)
Subject: how would you...?
Message-ID: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>

I'm pretty new to programming. I've just been studying a few weeks off
and on. I know a little, and I'm learning as I go. Programming is so
much fun! I really wish I would have gotten into it years ago, but
here's my question. I have a longterm project in mind, and I wont to
know if it's feasible and how difficult it will be.

There's an XML feed for my school that some other class designed. It's
just a simple idea that lists all classes, room number, and the person
with the highest GPA. The feed is set up like this. Each one of the
following lines would also be a link to more information about the
class, etc.

Economics, Room 216, James Faker, 3.4
Social Studies, Room 231, Brain Fictitious, 3.5

etc, etc

The student also has a picture reference that depicts his GPA based on
the number. The picture is basically just a graph. I just want to
write a program that uses the information on this feed.

I want it to reach out to this XML feed, record each instance of the
above format along with the picture reference of the highest GPA
student, download it locally, and then be able to use that information
in various was. I figured I'll start by counting each instance. For
example, the above would be 2 instances.

Eventually, I want it to be able to cross reference data you've
already downloaded, and be able to compare GPA's, etc. It would have a
GUI and everything too, but I am trying to keep it simple right now,
and just build onto it as I learn.

So lets just say this. How do you grab information from the web, in
this case a feed, and then use that in calculations? How would you
implement such a project? Would you save the information into a text
file? Or would you use something else? Should I study up on SQLite?
Maybe I should study classes. I'm just not sure. What would be the
most effective technique?


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 19:02:33 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 19:02:33 -0400
Subject: SImple python print question
In-Reply-To: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
Message-ID: <LnoXj.10564$Xv3.10250@bignews4.bellsouth.net>

amit.uttam at gmail.com wrote:
> Hey there,
> 
> I have a simple question about python print statement. Take the
> following code snippet for example...
> 
> 1 print "-#- executing: %s" % section,
> 2 tests[section] = test.testcase(name=config.get(section,'name'))
> 3 tests[section].runTest()
> 4 printStatus(tests[section])
> 
> Now the problem is that line 1 does not get printed until line 4. What
> I thought would happen is that line 1 gets executed and the user sees
> that the statement that the test case is executing. Then after the
> test case executes a "PASS" or "FAIL" appears on the same line as the
> "-#- executing: 0053" statement.
> 
> e.g.
> -#- executing: 0053     FAIL
> 
> Some tests take a long time to finish thus the screen is blank until
> the entire test finishes and the above statement is outputted.
> 
> Thanks for any help.

'print' sends its output to sys.stdout, which is buffered, and may not be 
displayed immediately (because it's held in the buffer).  To force the output to 
be displayed, use flush():

   print "-#- executing: %s" % section,
   sys.stdout.flush()
   ...tests here...

Hope this helps!

--Hans


From fc14301589 at icqmail.com  Wed May 21 09:31:24 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 21 May 2008 21:31:24 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
Message-ID: <48342434_2@news.tm.net.my>

On 18:15, mercoled? 21 maggio 2008 alex23 wrote:

> On May 21, 7:52 pm, TheSaint <fc14301... at icqmail.com> wrote:

> There's also http://python.pastebin.com, which lets you create a new
> paste by modifying an existing one, and keeps them linked for easy
> diff'ing.
> 
> Sample: http://python.pastebin.com/d3964b241

Thank you for the reply :)
In my case, it's rather a set of modules which trying to remove spam from the
mailbox(es) either by POP3 or IMAP4 according regex criteria.
The project is working quiet good, the most advantage is that it downloads
only the header for speed needs. Some time I'm doing it by GPRS in roaming
and volume it _matters_ much.
I simply like that somebody will express some opinion about my job, as
meaning of teaching me better. After all that's what I'm trying to do ;)

Other idea, I'll apreciate somebody to join and put new views on this
project.





From nospam103 at jmiaz.com  Fri May 23 13:52:08 2008
From: nospam103 at jmiaz.com (Aaron Lance)
Date: Fri, 23 May 2008 10:52:08 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <ovDZj.89651$y05.58726@newsfe22.lga>

Troll much? 




From rdm at rcblue.com  Sun May 18 01:49:03 2008
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 May 2008 22:49:03 -0700
Subject: r' question
In-Reply-To: <op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <20080518023835.61FE61E4009@bag.python.org>
	<op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <20080518054915.9555B1E4007@bag.python.org>

At 10:17 PM 5/17/2008, Gabriel Genellina wrote:
>En Sat, 17 May 2008 23:37:16 -0300, Dick Moores <rdm at rcblue.com> escribi?:
>
> > I have a text file of phone numbers, which I'd like to search with a regex.
> >
> > fstr = "\sjoe\s"
> > regex = "^.*" + fstr + ".*$"
> >
> > fstr = "\sjoe\s"
> > regex = "r'^.*" + fstr + ".*$'"
>
>The r"..." is a signal to the parser - meaning 
>"don't interpret the escape characters here". 
>Note that the r is OUTSIDE the quotes. In your 
>example, the escape characters are in fstr, so 
>it should be written as r"\sjoe\s"

However, (please refer back to my original post) 
I want to keep the fstr, ultimately to be the 
string entered by the user who knows a bit about 
regex, but not how to use r'  ' . Or 
alternatively, not assume any knowledge of regex, 
but build in some options, such as ignoring/not 
ignoring case, searching on just a string, or on 
a word. So I want to know how to build the user's 
fstr into regex. I apologize for not making this clear.

>Now, if you want "the lines that contain the 
>word joe surrounded by space", just use:
>
>import re
>regex = r"\sjoe\s"
>p = re.compile(regex, re.I)
>f = open('phone.txt', 'r')
>for line in f:
>      m = p.search(line)
>      if m:
>          print m.group()
>f.close()
>
>A file is its own line iterator (no need for 
>readlines). And since you're iterating over 
>lines, the regex doesn't have to test for it ^ and $.

Yes, that works. Thanks.

Dick Moores 



From inhahe at gmail.com  Tue May 13 11:48:26 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 11:48:26 -0400
Subject: how to pass a python socket to a .dll?
Message-ID: <HJiWj.2720$Kk3.1386@bignews9.bellsouth.net>

i'm trying to make a .dll that will let me use WSAPoll, which is a windows 
sockets function, to mimic select.poll on a windows box.  i cbb learning 
python extensions, so i'm just going to use ctypes with a dll, so I hope 
that it doesn't bring up a big performance issue.   anyway, the problem is 
that I want to use Python-created sockets with it, but WSAPoll requires 
winsock2.h SOCKET objects.

so unless someone can tell me how to create/reference a windows socket 
object using the winsock2 lib from just a file/socket descriptor (being that 
this isn't a windows programming forum), i'm just asking how I could gain 
access to the actual Windows socket associated with a Python socket that 
Python for Windows has to store somewhere.  even if I have to modify 
socketmodule.c.

btw, i don't know much about this stuff, i hardly ever even program in c++, 
so i hope anybody's not too cryptic :P








From upton at virginia.edu  Thu May 29 18:53:29 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 18:53:29 -0400
Subject: question
In-Reply-To: <13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <5504f9ac0805291553n953f44o67a46886f796fc63@mail.gmail.com>

On Thu, May 29, 2008 at 6:41 PM, Gandalf <goldnery at gmail.com> wrote:
> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
>
> mmm isn't their any global variable for functions?

If I get what you're asking, you have to tell the function there
exists a global:

IDLE 1.2
>>> x=1
>>> def a():
	global x
	x+=1
	if x > 1:
		print x
	else:
		print "nope"

		
>>> print x
1
>>> a()
2
>>> print x
2


From artyprog at gmail.com  Sun May 18 14:41:25 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Sun, 18 May 2008 20:41:25 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <48307858$0$906$ba4acef3@news.orange.fr>

Try this

t = set("aaaaaaaaaaaabbbbbbbbbbccccccccc")
list(t)

Regards

Salvatore


"Matt Porter" <mabbikeel at gmail.com> a ?crit dans le message de news: 
mailman.1315.1211133997.12834.python-list at python.org...
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt
> -- 
> --
> 




From bignose+hates-spam at benfinney.id.au  Fri May  2 19:40:03 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 09:40:03 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<mailman.461.1209740889.12834.python-list@python.org>
Message-ID: <871w4kz358.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Sat, 03 May 2008 00:43:02 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Roy Smith <roy at panix.com> writes:
> > > Have you ever shipped software to a customer?
> > 
> > Yes, and all parties have been quite happy with the results.
> 
> When some of us talk about shipping software we aren't talking about
> a 20 line script delivered to our uncle's construction company
> office.

Nor was I. Thanks for the condescension and straw-man attacks, but...

> I do believe I am done with this thread.

That's a relief.

-- 
 \          ?He that would make his own liberty secure must guard even |
  `\                         his enemy from oppression.? ?Thomas Paine |
_o__)                                                                  |
Ben Finney


From dteslenko at gmail.com  Wed May 14 03:04:19 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Wed, 14 May 2008 11:04:19 +0400
Subject: file locked for writing
In-Reply-To: <op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
	<op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>

On Wed, May 14, 2008 at 8:18 AM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 13 May 2008 11:57:03 -0300, Dmitry Teslenko <dteslenko at gmail.com>
>  Is the code above contained in a function? So all references are released
> upon function exit?

Yes, it's a function

>  If not, you could try using: del input, output, filter
>  That should release all remaining references to the output file, I presume.
> Or locate the inner reference to the output file (filter.something perhaps?)
> and explicitely close it.

That doesn't help either.
When I've rewrite code something like that:

       with open(backup_file_name, 'w') as backup_file:
               .....
               filter.parse('<updated file name>')
	       del input, output, filter
	os.remove(project.get_vcproj())
	os.rename(backup_file_name, project.get_vcproj())

It triggers WindowsError on os.remove()


From miller.paul.w at gmail.com  Sun May 25 22:46:14 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:46:14 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com>

On May 25, 3:51?pm, pball.benet... at gmail.com wrote:
> dear pythonistas,
>
> I think this problem is related to integer partitioning, but it's not
> quite the same. The range of answers has a little combinatorial
> explosion problem as S gains new members. In my problem, len(S) is
> usually on the order of 1M, and in the worst case, 10M, and there are
> on the order of 10k elements.

If, by "integer partitioning," you mean the "subset sum
problem" (given a finite set S of integers, does S contain a subset
which sums up to some given integer k?), then you are right.  I'm
reasonably sure there's a polynomial reduction from your problem to
the subset sum problem.  That would make your problem NP-complete.

As for algorithms, I don't think there's an exact algorithm any better
than trying all the possibilities and stopping when one comes close.
Say, for example, we specify the problem to be: given sets s_0, s_1,
s_2, ..., s_n, with S defined to be the union of all the s_i's, return
all functions f which, using the sets s_1, s_2, ..., s_n and the
elementary set operations (union, intersection, difference), returns
the set s_0.

Now, you need to be a little more careful, because, given a function f
which satisfies the problem, I can always define f' = f(S) + s_1 - s_1
and get another function which satisfies the definition.

Like I said, because this looks related to the subset sum problem
(though harder, because you're asking for "all" such functions, for
some rigorous definition of "all," as per the previous sentence), I
suspect it's NP-complete.  However, there are probably some good
heuristics, such as if s1 has a large intersection with s0, it's
probably a good idea to use s1 in whatever formula you come up with.

Other than that, I don't really have an idea.  Can you say what the
application of this algorithm would be?  Knowing the use case might
suggest a better approach.


From cnshoes76 at yahoo.com.cn  Sat May 10 04:11:16 2008
From: cnshoes76 at yahoo.com.cn (cnshoes76 at yahoo.com.cn)
Date: Sat, 10 May 2008 01:11:16 -0700 (PDT)
Subject: CHINA WHOLESALE MEN 'S PRADA GUCCI SANDALS
Message-ID: <da3c2a5d-a999-4b10-ac20-3acd5f299bfa@q24g2000prf.googlegroups.com>

European and South America market. All the products are in high
quality with reasonable price. Most of the items listed in our
website ,we have got them in stocks, if there isn't ,please let us
know your specific requirements.



From geoldr at gmail.com  Thu May 22 11:59:40 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 08:59:40 -0700 (PDT)
Subject: Restarting a program
Message-ID: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>

Hello all, I have written a simple program, and at the end of it,
instead of it closing I would like it to restart from the beggining.
Is there a way to do this? Put my code into a class function, or
something?
I guess I could do a while loop, but I think if there is a way to run
my code if it's in a class would be an easier option. I can't seem to
find many guides online but maybe I have not been looking in the right
places.

Anybody have any ideas?


From saluk64007 at gmail.com  Fri May  2 13:36:58 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Fri, 2 May 2008 10:36:58 -0700
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
	<8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
Message-ID: <c3f69bf60805021036t455445a6i89f3e20644b5a751@mail.gmail.com>

The K_a is a constant integer, but you don't need to worry about it's
value.  It tells you the index in get_pressed() to check for.  So:

print pygame.key.get_pressed()[pygame.K_a]

Says, look at the 97th index in the get_pressed() list and see if that is a
1 or a 0.

Or if you use the pygame events:

for evt in pygame.event.get():
    if evt.type == pygame.KEYDOWN and evt.key == pygame.K_a:
        print "a pressed"

evt.type and evt.key will both be integers that map to one of the type
constants and one of the key constants respectively.  This way the key
constant works in both types of input handling (which are both useful for
different types of input).
-------------- next part --------------
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From mal at egenix.com  Thu May  1 06:03:33 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 01 May 2008 12:03:33 +0200
Subject: Python -v import behavior
In-Reply-To: <357b87b40804300942v371152b0u9dcc6d8b8d0a3b32@mail.gmail.com>
References: <357b87b40804300942v371152b0u9dcc6d8b8d0a3b32@mail.gmail.com>
Message-ID: <48199575.9020608@egenix.com>

On 2008-04-30 18:42, Sean Ryan wrote:
> Hi all,
> (A similar question was posted by a colleague, but did not appear to  reach
> comp.lang.python or this list).
> 
> I am wondering if the -v option causes the python application to be more
> tolerant to module import warnings and / or errors.
> 
> The reason is that a module is failing to import correctly (generating an
> ImportError exception).  Examining this closer we re-ran the script using
> the -v option. to find that "Unsatisfied symbol" errors we being displayed
> during import (cx_Oracle 4.3.1, python 2.5.1, HP-UX 11, oracle 9.2).
> However, the module is usable from the python prompt (when using -v)
> displayed, i.e. dir (cx_Oracle) works correctly, as does  database
> interaction.  Without the -v option the script is halted due to the
> ImportError exception.
> 
> My questions are:
> 1.  Is there a way to mimic the seemingly more tolerant import behavior  of
> python -v without producing the verbose output ?
> 2.  Is the behavior described above expected and documented ?

The -v option only causes Python to print more information to
stderr explaining where it is looking for modules.

You should be seeing any dynamic loader messages in both cases,
ie. when running with or without -v.

While it is possible that cx_Oracle does some extra processing
when running Python in -v mode, this is rather unlikely.

Note that the best way to track down "unsatified symbol" errors
is to inspect the dependencies of the modules and other shared
libs involved.

Running an strace (or similar system trace utility) will also
help to identify the problem, since this lists the shared libs
the process tries to load when starting up and also during
import of Python modules.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 01 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From kyosohma at gmail.com  Sat May 10 14:43:06 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 10 May 2008 11:43:06 -0700 (PDT)
Subject: Is there a PyPI API?
Message-ID: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>

Hi,

I am experimenting on creating a GUI wrapper for easy_install and I
would like to be able to allow the user the browse PyPI topically.
However, I am having some trouble figuring out how to get the
information in a topical manner.

I can get the list of classifiers easily using urllib2 like so:

def getPyPiClassifiers():
    print 'Get list of Topics from PyPI...'

    url = 'http://pypi.python.org/pypi?%3Aaction=list_classifiers'
    res = urllib2.urlopen(url)
    page = res.read()

And there's a "light-weight" list of all the packages on PyPI here:
http://pypi.python.org/simple/

I just can't figure out how to get the metadata, I guess. I found Paul
Boddies SGMLParser example (http://www.boddie.org.uk/python/HTML.html)
which can get me some URLs, but what I really need is some kind of
dict of tuples or lists like this:

{'Framework':(('Buildout', 'bazaarrecipe', 'Buildout recipe for
Bazaar'),
                   ('Buildout', 'buildout_script', 'zc.buildout
recipes for generating script and conf files from templates.')
)}

Any ideas on how best to approach this would be great. I'm still
learning HTML/XML parsing techniques and am having trouble wrapping my
mind around it.

Thanks!

Mike


From efurman at admailinc.com  Thu May 22 13:13:57 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 22 May 2008 09:13:57 -0800
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <4835A9D5.9060607@admailinc.com>

John Machin wrote:

> Robert Kern wrote:
>
>> Ethan Furman wrote:
>>
>>> Greetings,
>>>
>>> I'm looking at the struct module for binary packing of ints and 
>>> floats.  The documentation refers to C datatypes.  It's been many 
>>> years since I looked at C, but I seem to remember that the data type 
>>> sizes were not fixed -- for example, an int might be two byes on one 
>>> machine, and four bytes on the next.  Can any C programmers verify 
>>> this?  If it is true, does that mean that struct.pack('h', 8001) 
>>> might give me different results depending on the machine it's 
>>> running on?
>>
>>
>> Right. I believe (but could be wrong) that "char" is defined to be 
>> one byte, but that "short", "int", "long", and "long long" are 
>> defined as "at least as big as the previous type".
>>
>> In practice, though, on nearly every machine that Python runs on, 
>> "char" is one byte, "short" is two bytes, and "int" is four bytes. 
>> "longs" and "long longs" tend to vary substantially, though; never 
>> assume sizes for them.
>>
>> Single-precision floats are always four bytes and double-precision 
>> floats are always eight bytes. "long doubles" vary; they could be 
>> twelve bytes or sixteen.
>>
>> If you want to deal with fixed sizes, use struct.calcsize() to test 
>> the sizes of each of the integer types, assign them to width-specific 
>> aliases, and always use these aliases.
>>
>
> This is all true if you want to operate in "native" mode; however in 
> "standard" mode the sizes are fixed -- otherwise there'd be no easy 
> way of reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof 
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required 
> for any type (so you have to use pad bytes); short is 2 bytes; int and 
> long are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and 
> double are 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a 
> long-established PC file format, he will need to '<' for littleendian 
> order, and an appropriate selection from bBhHiI and d will do what he 
> needs.
>
> HTH,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Next question:  when using struct.pack to store an integer, I get a 
deprecation warning if the int is too big... I would rather have an 
error.  Is there a setting somewhere that controls this?

 >>> struct.pack('<i', 4294967295)
c:\python25\interact.py:1: DeprecationWarning: struct integer overflow 
masking is deprecated
'\xff\xff\xff\xff'



From fc14301589 at icqmail.com  Wed May 21 05:52:56 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 21 May 2008 17:52:56 +0800
Subject: Publish a program
Message-ID: <4833f0ff_2@news.tm.net.my>

Hello,

I'm not a master of python :) If I would publish my program for reviewing,
where should I upload it?




From ethan.mallove at sun.com  Tue May 20 15:15:28 2008
From: ethan.mallove at sun.com (emallove)
Date: Tue, 20 May 2008 12:15:28 -0700 (PDT)
Subject: Python in non-standard location erring with "No module named 
	_sha256"
References: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>
Message-ID: <3bcbc67a-2293-4a38-b335-43d8791232d6@z24g2000prf.googlegroups.com>

On May 20, 11:27?am, emallove <ethan.mall... at sun.com> wrote:
> I'm running into the below "No modules named _sha256" issue, with a
> python installed in a non-standard location.
>
> $ python
> Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
> [GCC 3.3.3 (SuSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> import md5
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
> ? ? from hashlib import md5
> ? File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
> <module>
> ? ? sha224 = __get_builtin_constructor('sha224')
> ? File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
> __get_builtin_constructor
> ? ? import _sha256
> ImportError: No module named _sha256
>
> Googling around, this seems to be related to OpenSSL being in a non-
> standard location? I've edited the Setup file to set $(SSL) to the non-
> standard location. Now Python compiles fine, but I still get the above
> error.
>
> Any help would be much appreciated.
>
> Thanks,
> Ethan

One solution was to just use Python 2.3.7 (instead of 2.5).

-Ethan


From aguirre.adolfo at gmail.com  Tue May  6 17:58:18 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Tue, 6 May 2008 14:58:18 -0700 (PDT)
Subject: DISLIN Manual
Message-ID: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>

I am at the very beginning of the DISLIN 9.3 Manual:   1.4 Quickplots

Some quickplots are added to the DISLIN module which are collections
of DISLIN routines for displaying data with one command. For example,
the function ?plot? displays two-dimensional curves. Example:
from Numeric import *
from dislin import *
x = arange (100, typecode=Float32)
plot (x, sin (x/5))
disfin ()

Problems:

1. "from Numeric import * "  statement produced an error message, I
had to replace it with "from numpy import *"

2. The "from dislin import *" statement produced an error message:
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    from dislin import *
ImportError: No module named dislin

I checked the environmental variables paths and they are according to
instructions. What else to do?

Any help will be much appreciated

Adolfo


From gagsl-py2 at yahoo.com.ar  Mon May 26 01:37:45 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 02:37:45 -0300
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
Message-ID: <op.ubqxw7yox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 02:06:02 -0300, Prisoner at War <prisoner_at_war at yahoo.com> escribi?:

> Might you have any idea, BTW, whether the upcoming "Head First
> Programming" from O'Reilly, coming in August, will cover Python 3??
> Unlikely, right?  Unless maybe if that guy Vern Ceder (the author) is
> active in the Python development community??
>
> I'd already pre-ordered the book...but it makes no sense to get a book
> on "old" Python 2.x if it's just going to get deprecated in like a
> year or two!  Then again, current Python programs would still work,
> right?  I mean, once it's been done up as an executable...PySol or
> something should still work, right?  (Sorry, iman00b, I don't really
> know how this stuff works....)

The differences aren't so fundamental or important: it's not an entirely new language, just some ugly old things are being removed or changed in incompatible ways (at *some* time it was supposed to happen - but could not happen on the 2.x series which has to remain backwards compatible)
Also, Python 3.0 will be released simultaneously with 2.6, and there will be other 2.x releases. Python 2 won't magically disappear from Earth, I don't think Linux distros will come with Python 3.0 by default anytime soon (perhaps not before 3.1).
So learning Python with a book targeted to 2.5 isn't a waste of time - not at all.
(This subject has already been discussed several times in this group.)

-- 
Gabriel Genellina



From kw at codebykevin.com  Sun May 25 10:42:06 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 25 May 2008 10:42:06 -0400
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <48397ABE.2070006@codebykevin.com>

Sanoski wrote:
> This might be a dumb question. I don't know. I'm new to all this. How
> do you find icons for your programs? All GUI applications have cool
> icons that represent various things. For instance, to save is often
> represented as a disk, etc. You know, the small little picture
> references that give meaning to the phrase 'Graphical User Interface'.
> But I'm not a graphics artist! Drawing is simply one talent that
> skipped me completely. Where can I find icons to use with my programs?
> 
> I don't even know how to search for them, because I'm not sure how to
> word it. I tried Googling various things: icons, software graphics,
> application icons, custom graphics, etc, etc. But I'm not getting much
> luck here you guys.
> 
> Also, besides just finding a collection of various pre-made icons, who
> would I talk to to make me some original custom made icons? I'll look
> for hours and find one or two places, but they never respond to my
> messages, so I figure they must not do that kind of art work.
> 
> I'm looking for both: a collection of graphics and some place (or
> someone) that can make custom original graphics. The latter is just
> for future reference. The more important one is the former, because I
> can't even afford to pay for originals right now. But maybe I will
> soon, so it would be nice to have a resource.
> 
> Thanks in advance,
> Joshua

http://tango.freedesktop.org/Tango_Desktop_Project
http://www.oxygen-icons.org/
http://everaldo.com/crystal/

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From d3vvnull at gmail.com  Sat May  3 12:34:39 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Sat, 3 May 2008 11:34:39 -0500
Subject: Why is None <= 0
In-Reply-To: <4d86a7ce-8f3f-493b-b1c2-a2659817b215@k13g2000hse.googlegroups.com>
References: <fut7q3$kup$1@newsreader2.utanet.at>
	<481226f9$0$20866$9b622d9e@news.freenet.de>
	<Xns9A8F6B26096EFduncanbooth@127.0.0.1>
	<4d86a7ce-8f3f-493b-b1c2-a2659817b215@k13g2000hse.googlegroups.com>
Message-ID: <170543c70805030934x2d1c23es90c424c0592590f4@mail.gmail.com>

New style classes are classes inherited from class object.  Therefore:
class A:
    pass

is oldstyle, while

class B(object):
    pass

is newstyle.

On Tue, Apr 29, 2008 at 8:29 AM, blaine <frikker at gmail.com> wrote:

> On Apr 29, 5:32 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> > =?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?= <mar... at v.loewis.de> wrote:
> > > (FWIW, in 2.x, x>=4?, it's None < numbers < anything else;
> > > numbers are ordered by value, everything else is ordered
> > > by type name, then by address, unless comparison functions
> > > are implemented).
> >
> > Quite apart from Jon pointing out that this isn't true for all cases
> when
> > copmparing against None, the other half also isn't true:
> >
> > >>> class C: pass
> > >>> C() < 5
> >
> > True
> >
> > That happens at least in Python 2.5.2 on win32. Yet another reason to
> avoid
> > old-style classes.
>
> Sorry - but what are new style classes?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From castironpi at gmail.com  Wed May 14 19:21:50 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:21:50 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>
Message-ID: <d100fada-097c-49cb-8eb8-c56344245ea5@24g2000hsh.googlegroups.com>

On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> >?Should tuples be named?
>
> Yes.

Good; they're named sequences.


From arnodel at googlemail.com  Wed May  7 16:12:18 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 21:12:18 +0100
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <m2bq3h6fh9.fsf@googlemail.com>

"M?ta-MCI (MVP)" <enleverlesX.XmcX at XmclaveauX.com> writes:

> Hi!
>
>> I don't often feel like using this word
>
> Look at languages like OCAML or F #

While I like Objective Caml, it is definitively not Python!

-- 
Arnaud



From rhamph at gmail.com  Mon May 12 04:40:01 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 12 May 2008 01:40:01 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
Message-ID: <339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com>

On May 11, 10:16 am, skunkwerk <skunkw... at gmail.com> wrote:
> On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
> > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > declaimed the following in comp.lang.python:
>
> >         Coming in late...
>
> > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > >skunkwerkwrote:
> > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > new requests are inserted, like so:
>
> >         <snip>
>
> > > > > queue = Queue.Queue(0)
> > > > >  WORKERS=100
> > > > > for i in range(WORKERS):
> > > > >    thread = SDBThread(queue)
> > > > >    thread.setDaemon(True)
> > > > >    thread.start()
>
> > > > > the thread:
>
> > > > > class SimpleDBThread ( threading.Thread ):
> > > > >    def __init__ ( self, queue ):
> > > > >            self.__queue = queue
>
> >         Note: double-leading __ means "name mangling" -- typically only
> > needed when doing multiple layers of inheritance where different parents
> > have similar named items that need to be kept independent; a single _ is
> > the convention for "don't touch me unless you know what you are doing"
>
> > > > >            threading.Thread.__init__ ( self )
> > > > >    def run ( self ):
> > > > >            while 1:
> > > > >                    item = self.__queue.get()
> > > > >                    if item!=None:
> > > > >                            model = domain.get_item(item[0])
> > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > >                            title = model['title']
> > > > >                            scraped = model['scraped']
> > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > any suggestions?
> > > > > thanks
>
> >         <snip>
>
> > > thanks John, Gabriel,
> > >   here's the 'put' side of the requests:
>
> > > def prepSDBSearch(results):
> > >    modelList = [0]
> > >    counter=1
> > >    for result in results:
> > >            data = [result.item, counter, modelList]
> > >            queue.put(data)
> > >            counter+=1
> > >    while modelList[0] < len(results):
> > >            print 'waiting...'#wait for them to come home
> > >    modelList.pop(0)#now remove '0'
> > >    return modelList
>
> >         My suggestion, if you really want diagnostic help -- follow the
> > common recommendation of posting the minimal /runable (if erroneous)/
> > code... If "domain.get_item()" is some sort of RDBM access, you might
> > fake it using a pre-loaded dictionary -- anything that allows it to
> > return something when given the key value.
>
> > > responses to your follow ups:
> > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > list in the above function.  it's not global, and the initial values
> > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > passes in the same memory address or declares a new 'data' list (which
> > > I guess is what I want)
>
> >         Rather confusing usage... In your "put" you have a list whose first
> > element is "result.item", but then in the work thread, you refer to the
> > entire list as "item"
>
> > > 3)  the first item in the modelList is a counter that keeps track of
> > > the number ofthreadsfor this call that have completed - is there any
> > > better way of doing this?
>
> >         Where? None of your posted code shows either "counter" or modelList
> > being used by thethreads.
>
> >         And yes, if you havethreadstrying to update a shared mutable, you
> > have a race condition.
>
> >         You also have a problem if you are using "counter" to define where
> > in modelList a thread is supposed to store its results -- as you can not
> > access an element that doesn't already exist...
>
> > a = [0]
> > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> >         Now, if position is irrelevant, and a thread just appends its
> > results to modelList, then you don't need some counter, all you need is
> > to check the length of modelList against the count expected.
>
> >         Overall -- even though you are passing things via the queue, the
> > contents being pass via the queue are being treated as if they were
> > global entities (you could make modelList a global, remove it from the
> > queue entries, and have the same net access)...
>
> >         IOWs, you have too much coupling between thethreadsand the feed
> > routine...
>
> >         As for me... I'd be using a second queue for return values...
>
> > WORKERTHREADS = 100
> > feed = Queue.Queue()
> > result = Queue.Queue()
>
> > def worker():
> >         while True:
> >                 (ID, item) = feed.get()                 #I leave the queues globals
> >                                                                                 #since they perform locking
> >                                                                                 #internally
> >                 model = domain.get_item(item)
> >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > for i in range(WORKERTHREADS):
> >         aThread = threading.Thread(target=worker)
> >                 #overkill to subclass as there is now no specialized init
> >                 #and if I really wanted to make the queues non-global
> >                 #I'd pass them as arguments:
> >                 #       threading.Thread(target=worker, args=(feed, results))
> >                 #where worker is now
> >                 #       def worker(feed, results):
> >         aThread.setDaemon(True)
> >         aThread.start()
>
> > ...
>
> > def prepSearch(searches):
> >         modelList = []
> >         counter = 0
> >         for searchItem in searches:
> >                 feed.put( (counter, searchItem) )
> >                 counter += 1
> >                 modelList.append(None)  #extend list one element per search
> >         while counter:
> >                 (ID, title, scraped) = results.get()
> >                 modelList[ID] = (title, scraped)
> >                 counter -= 1
> >         return modelList
>
> >         The only place counter and modelList are modified are within the
> > prepSearch. I'm passing counter out and back to use as an ID value if
> > the final results are supposed to be in order -- that way if one thread
> > finishes before another, the items can be placed into the list where
> > they'd have been sequentially.
>
> >         I can only hope that "domain.get_item" is an activity that is I/O
> > bound AND that it supports parallel accesses... Otherwise the above
> > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > threading swaps for what is otherwise a rather linear process.
>
> >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > mainthreadsthat are posting to the worker feed queue (and you were
> > using separate mutables for storing the results). In this situation, I'd
> > remove the results queue from being a global entity, create one queue
> > per main processing thread, and pass the queue as one of the parameters.
> > This way, a worker can return data to any source thread by using the
> > supplied queue for the return...
>
> > Modify prepSearch with:
>
> >         myQueue = Queue.Queue()
> > ...
> >         feed.put( (counter, searchItem, myQueue) )
> > ...
> >         (ID, title, scraped) = myQueue.get()
>
> > Modify worker with:
>
> >         (ID, item, retqueue) = feed.get()
> > ...
> >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> wow.  thanks for the help.
>    i seem to have fixed my problem though - it turns out
> domain.get_item was not thread safe as it was using the underlying
> httplib.  the solution was to create a new connection to the database
> for each thread (which is ok as the database is meant to be queried in
> a massively paralell fashion).  the missing part of the code included
> a part where i inserted the results at the given position into the
> list.
>
> the only issue i have now is that it takes a long time for 100 threads
> to initialize that connection (>5 minutes) - and as i'm doing this on
> a webserver any time i update the code i have to restart all those
> threads, which i'm doing right now in a for loop.  is there any way I
> can keep the thread stuff separate from the rest of the code for this
> file, yet allow access?  It wouldn't help having a .pyc or using
> psycho, correct, as the time is being spent in the runtime?  something
> along the lines of 'start a new thread every minute until you get to a
> 100' without blocking the execution of the rest of the code in that
> file?  or maybe any time i need to do a search, start a new thread if
> the #threads is <100?

$ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
t.start(); t.join()'
10000 loops, best of 3: 131 usec per loop

Clearly it is not the threads themselves, but something else which is
expensive.

It's not clear why you need threads at all.  Unless you've got a lot
of cpus/cores running that DBMS, or it's got fairly high latency (and
no way to pipeline), attacking it with more threads isn't gonna give
significant speedups.


From goodprada at 126.com  Sat May 10 19:46:51 2008
From: goodprada at 126.com (128)
Date: Sat, 10 May 2008 16:46:51 -0700 (PDT)
Subject: paypal wholesale, NBA,adidas     (  paypal accept     )     (   
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Message-ID: <adce9449-797d-4946-aacc-5b1f1c681e73@w4g2000prd.googlegroups.com>

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From dteslenko at gmail.com  Tue May 13 10:57:03 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Tue, 13 May 2008 18:57:03 +0400
Subject: file locked for writing
Message-ID: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>

Hello!
I use some script in python 2.5 from vim editor (it has python
bindings) that updates some file
and then launches another program (ms visual studio, for example) to
do something with updated file.
I faced problem when updated file is locked for writing until vim
editor is closed.

launch vim -> update file -> launch msvc -> file locked
launch vim -> update file -> launch msvc -> close vim -> file locked
launch vim -> update file -> -> close vim -> launch msvc -> file okay

Update code is something like that:

	backup_file_name = '<some file name>'
	with open(backup_file_name, 'w') as backup_file:
		input = sax.make_parser()
		output = saxutils.XMLGenerator(backup_file, 'cp1252')
		filter = __vcproj_config_filter('<updated file name>', input, output)
		filter.parse('<updated file name>')
	shutil.copyfile(backup_file_name, '<updated file name>')
	os.remove(backup_file_name)

__vcproj_config_filter is a descent of a XMLFilterBase; it substitutes
some attributes in xml file and that's all.
must be noted that __vcproj_config_filter instance holds reference to
output (sax xml parser) object.


From inhahe at gmail.com  Wed May 21 01:58:23 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 01:58:23 -0400
Subject: Removing Space and "-" from a string
References: <mailman.1387.1211301238.12834.python-list@python.org>
Message-ID: <zROYj.13071$Xv3.2883@bignews4.bellsouth.net>


<python at bdurham.com> wrote in message 
news:mailman.1387.1211301238.12834.python-list at python.org...
> Shakir,
>
>> I have thousands of records in MS Access database table, which records I
>> am fetching using python script. One of the columns having string like
>> '8 58-2155-58'
>>
>> Desired output: '858215558'
>>
>> I want to remove any spaces between string and any dashes between
>> strings. I could do it in access manually but want to do from python
>> script
>
> Try this:
>
>>>> input = '8 58-2155-58'
>>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>>> output
> '858215558'
>
> Malcolm

how about

output = ''.join(input.replace('-',' ').split())
or
output = input.replace('-','').replace(' ','')




From grante at visi.com  Wed May 14 09:51:31 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 14 May 2008 08:51:31 -0500
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
	<go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
Message-ID: <T-mdnWQVhZf-c7fVnZ2dnUVZ_hninZ2d@posted.visi>

On 2008-05-14, Tim Roberts <timr at probo.com> wrote:
> globalrev <skanemupp at yahoo.se> wrote:
>
>>and when the program gets killed because out of memory all this
>>will be deleted from the memory?
>
> Yes.  When a process is killed, all of the memory it was using
> is released.
>
>>so there is no way that you can, by accident, fill your whole
>>harddrive and make it unusable?
>
> Of course not.  Where do you see a connection between memory
> and your hard drive?
>
> Now, you can certainly fill your hard drive by running your
> little infinite loop application and storing the results in a
> file:

Again, that's only a problem if the OS lets it be problem.  No
real OS will let a drive become unusable because of a runaway
user program.  Any decent filesystem can provide per-user disk
quotas and a "reserve" of space for system/root use.

-- 
Grant Edwards                   grante             Yow! I just had a NOSE
                                  at               JOB!!
                               visi.com            


From jcd at unc.edu  Mon May  5 08:51:25 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Mon, 05 May 2008 08:51:25 -0400
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <1209991885.3300.2.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 04:57 -0700, globalrev wrote:
> class Foo(object):
> 	def Hello(self):
> 		print "hi"
> 
> object is purple, ie some sort of reserved word.
> 
> why is self in black(ie a normal word) when it has special powers.
> replacing it with sel for example will cause an error when calling
> Hello.
> 

Wow.  No it won't.  sel is perfectly legal.  I've seen s used on
occasion, and of course metaclass methods often use cls.

Direct ^C^V from my python interpreter:

$ python
Python 2.4.3 (#1, Dec 11 2006, 11:38:52) 
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class Foo(object):
...     def Hello(sel):
...             print "hi"
... 
>>> f = Foo()
>>> f.Hello()
hi
>>> 

Can you paste an example that breaks for you?


-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From sebey at mac.com  Thu May 29 10:26:18 2008
From: sebey at mac.com (sebey)
Date: Thu, 29 May 2008 07:26:18 -0700 (PDT)
Subject: feedparser html sanitizion how-to disable it
References: <c7a6a23f-9fcf-4add-9e2e-9202f2895932@25g2000hsx.googlegroups.com>
Message-ID: <ee5fc6e3-7e34-4938-95d3-6d9d673457c7@2g2000hsn.googlegroups.com>

oh sorry here is the rss feed I am using

http://recordings.talkshoe.com/rss39293.xml



From parimala.kalavala at gmail.com  Tue May 20 00:18:29 2008
From: parimala.kalavala at gmail.com (PARIMALA KALAVALA)
Date: Tue, 20 May 2008 09:48:29 +0530
Subject: regarding process preemption in linux
Message-ID: <67eb1c790805192118l646fd5c4l681b196ade76b5d2@mail.gmail.com>

Hello,

     I am presently working on linux.
I wanted to know how to view the preemption of one process by another
process. If we give TOP command we are not able to visualize it or do we
need to write any different code to see it or is it possible to see it in
the proc file system.

Any help would be appreciated.

Thanks

Parimala
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From nevillednz at gmail.com  Sat May  3 21:38:46 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Sat, 3 May 2008 18:38:46 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com> 
	<4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com> 
	<mailman.493.1209790152.12834.python-list@python.org>
Message-ID: <ce5621d9-3355-47bd-b338-03b0068035f7@u12g2000prd.googlegroups.com>

To check a complete python expression use:

def check_open_close(expr):
  try:
    eval(expr)
  except SyntaxError:
    return False
  else:
    return True

This also ignores brackets in quotes, and checks <= & >= operators are
syntatically correct etc...
But is may have side effects... ;-)
eg.
 check_open_close('__import__("os").system("echo rm -rf /") # OK')

c.f http://en.wikipedia.org/wiki/Scope_creep

N


From python at hope.cz  Thu May 15 11:38:38 2008
From: python at hope.cz (Johny)
Date: Thu, 15 May 2008 08:38:38 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<482c54f2$1@news.mel.dft.com.au>
Message-ID: <3e9fcb51-abe6-4a6a-bd1a-9adb5bd155c4@y21g2000hsf.googlegroups.com>

On May 15, 5:21?pm, John Machin <sjmac... at lexicon.net> wrote:
> Johny wrote:
> > Is there a module for reading/modifing db files from Python?
> > Thanks for help
> > B.
>
> I have a module -- which I'm going to get around to releasing one of
> these days :-) -- which allows to read dBase III, dBase IV and Foxpro
> files (sequentially only, not randomly) and to write dBaseIII files
> sequentially. Index files if any are ignored.
>
> Field types supported for reading:
> C character
> D date
> F float
> I integer (32 bits)
> L logical
> M memo (stored in a .DBT (dBase) or .FPT (FoxPro) file)
> N number
> T time
>
> Writing supports only dBaseIII with C, D, L and N fields, but could be
> extended easily enough (I've never had the need). No index files are
> written.
>
> E-mail me if you are interested.
>
> Cheers,
> John

Hello John,
Yes, I am interested. Is it possible to download the module?
Thanks
Lad


From goldnery at gmail.com  Fri May 30 08:57:03 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 05:57:03 -0700 (PDT)
Subject: Generating event from event
Message-ID: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>

I have script which being triggered by pressing CTRL+Right mouse click
from any place in my O.P , Now I need to generate automatically event
like copy my selected item or double clicking the right mouse cursor
without user interfering.
how can i implement this width python?


thanks!


From sn at sncs.se  Tue May 27 11:21:13 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:21:13 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
Message-ID: <a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>

I was talking about Guido van Rossum

The one who decides, so far when people agree

But we can make a new fork

He is the originator, but now it seems, for me, it is hanging out in
the air

So we need some new leadership

>From somebody, somebody like you perhaps. Or me.

Sverker


On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > seems to be needed
>
> > He doesn't seem to care much anyway now
>
> > Or if he cares, he have many other assignments
>
> Who are you talking about?
>
>
>
> > So should we try to elect a new chairman?
>
> Chairman? Elaborate please.
>
>
>
> > I am probably not eligible. There must be many others.!
>
> > Do you dare?consper
>
> Hm, are you and castrionpi twin brothers or something?
>
> > S.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.



From goldnery at gmail.com  Sat May 24 09:53:24 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 24 May 2008 06:53:24 -0700 (PDT)
Subject: About events
Message-ID: <97a6bea0-69a4-424f-b512-26ff80cecdb8@x41g2000hsb.googlegroups.com>

As i said before I work with the WX library on a windows XP operation
system.

Now i wont to create an application which ran at the background and
wait till the user  double click on a text word  OF any other python
or none python application which ran on the desktop, and when this
event append i wont my application to pup up a translation of this
word.

I figured that I need to understand  how can i select text
automaticlly and copy it to the clipbord for doing that

if someone know how to do it, or know whether  this WX library capable
of doing it (and if not which library can...) i would be very
thankful

Have a nice day


From gherron at islandtraining.com  Sat May  3 11:11:12 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 03 May 2008 08:11:12 -0700
Subject: How to use a parameter in a class
In-Reply-To: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <481C8090.6030905@islandtraining.com>

Decebal wrote:
> I have the following class:
> #####
> class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
>
>     def testing(self):
>         print 'In test: %d' % self.value
>
>     def returnValue(self):
>         return self.value
>
>     result = someFuntion(default = value)
>   

But of course it doesn't work, as it tries to call someFunction and no 
such thing is define anywhere. 

But that can't be the answer to the *real* question you are trying to 
ask.  Why don't you tell us what you are trying to do here, and we'll 
wee if we can help.

Gary Herron


P.S.  Having a class attribute AND an instance attribute, both named 
"value" is going to cause trouble.

>
>
> #####
>
> But the last line does not work.
> I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
>
> And that someFunction gets a default value of 12. How can I do that?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From mal at egenix.com  Thu May  8 12:13:01 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 08 May 2008 18:13:01 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
Message-ID: <4823268D.1060602@egenix.com>

On 2008-05-08 16:16, Florencio Cano wrote:
> Hi,
> I would be interested in your opinion about what technology you
> considear the ideal technology for implementing in Python an agent
> that should comunicate information to a web server. I have read about
> SOAP but I'm now sure if this will be the right one.
> The aim of the agent is gather inventory information and the web
> application (I'm programming it in Django) will receive this
> information and will store it in the database and will show it in
> tables.

The choice of protocol depends a lot on what you want to transfer.

SOAP would be a good choice if you want to send to data to other
servers as well, e.g. Java-based ones.

XML-RPC and JSON are better for simple data structures.

If you have control over both client and server and don't
need to bother with other backends or frontends, Python
pickle is the best choice.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 08 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From timr at probo.com  Thu May 22 00:52:16 2008
From: timr at probo.com (Tim Roberts)
Date: Thu, 22 May 2008 04:52:16 GMT
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
	<94ce5e02-0185-4513-9bc1-7ec483be57aa@y21g2000hsf.googlegroups.com>
Message-ID: <imu9341dhljm72kuo4rgq39udtuib86340@4ax.com>

"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> wrote:
>On May 20, 12:14 am, Tim Roberts <t... at probo.com> wrote:
>> Monica Leko <monica.l... at gmail.com> wrote:
>>
>> >I have a specific format and I need binary representation.  Does
>> >Python have some built-in function which will, for instance, represent
>> >number 15 in exactly 10 bits?
>>
>> For the record, I'd like to point out that even C cannot do this.  You need
>> to use shifting and masking to produce a stream of 8-bit bytes, or to
>> extract your values from a stream of 8-bit bytes.
>
>Technically specifying 8-bits isn't quite accurate, as C allows for 9-
>bit bytes and other variations depending on the architecture.  But
>that may be overly pedantic unless you have a PDP-10 laying around
>that you're writing C code on or something like that.

As long as we are being pedantic, and I don't mind that, I would point out
that I didn't actually say that C worked in 8-bit bytes.  I was very
careful to say merely that, assuming you wanted a stream of 8-bit bytes,
you need to use shifting and masking to produce it.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From __peter__ at web.de  Thu May 29 09:33:25 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 15:33:25 +0200
Subject: Reporting the line number of an exception
References: <229d7d86-c652-4282-aaa9-4274cd0d63fd@a1g2000hsb.googlegroups.com>
Message-ID: <g1mbb2$ono$02$1@news.t-online.com>

sophie_newbie wrote:

> I'm sure this is exceedingly simple but I can't find it anywhere. When
> I catch an exception I would like to report the line number of the
> exception as well as the error info.
> 
> try:
>     someError()
> except Exception, e:
>     "print_error_and_line_number"
> 
> How do I find the line number?

If you want just the line number:

tb = sys.exc_info()[2]
print tb.tb_lineno

You may also have a look at the traceback module, e. g.:

traceback.print_exc()

Peter


From musiccomposition at gmail.com  Sun May 25 23:05:13 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Sun, 25 May 2008 20:05:13 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <dad8a839-1311-4aa4-af30-959a502f399c@2g2000hsn.googlegroups.com>

On May 25, 6:19 pm, miller.pau... at gmail.com wrote:
> Is there any place outside the actual C source for Python that has
> information about the performance of Python's built-in operations? For
> example, I'd *expect* list.append to be O(1), and I hope that list[i]
> is O(1), but I don't really know that for sure, since it would depend
> a lot on the internal implementation.
>
> I'm really only asking this for curiosity's sake --- more as a
> reasonable, non-trollish version of the "Python is slow" post than
> anything. :-)  I've never really had any problems with the performance
> of Python code that I couldn't solve by either changing my algorithm
> or, if all else has truly failed, rewriting in C or Pyrex.
>
> What I'd like to see is something likehttp://svn.python.org/projects/python/trunk/Objects/listsort.txt
> where Python's sorting algorithm is described, except with the focus
> on other built-in constructs.

http://wiki.python.org/moin/TimeComplexity is a start.
>
> Thanks!



From deets at nospam.web.de  Tue May 13 12:40:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:40:54 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
Message-ID: <68tulsF2unducU2@mid.uni-berlin.de>

> This shows how much you don't know about customers, and their needs. A
> customer gives a s**t about 5-10 times faster sites. They care if it is
> *fast enough*, but beyond that they don't bother. But what *always*
> bothers them is development time & flexibility. Because that directly
> affects the price they pay.

Just to support this statement: PHP runs an order of magnitude slower than
python. Yet a great deal (if not the majority) of dynamic sites out there
run under PHP. All of these are unhappy customers?

Diez


From geonomica at gmail.com  Fri May 23 02:03:17 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 23:03:17 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
Message-ID: <f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>

On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > exception like this:
>
> > Traceback (most recent call last):
> >   File "<pyshell#18>", line 1, in <module>
> >     myDLL.myFUNCT()
> >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> >     func = self.__getitem__(name)
> >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> >     func = self._FuncPtr((name_or_ordinal, self))
> > AttributeError: function 'myFUNCT' not found
>
> Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> chance you compiled your C as C++ and name mangling kicked in?
>
> Can you show a minimal C source for a DLL, how you compiled it, what you
> did on the Python side to call it, and how it fails?
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I've located my dll in c:\windows\system32 (in linux I aven't any
problem) and I compiled it with dev-c++. The source code is C standard
ANSII and is quite havy. If you like I can send it via mail (you can
realy at geonomica at gmail.com) . I've tryed to build a wrape with swig
olso with same code and I can access at all the function.
thanks
Gianluca


From bearophileHUGS at lycos.com  Sun May  4 06:50:00 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 4 May 2008 03:50:00 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
Message-ID: <53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>

David:

> What do you mean by best possible? Most efficient? Most readable?

What's a good wine? It's not easy to define what's "good/best". In
such context it's a complex balance of correct, short, fast and
readable (and more, because you need to define a context. This context
refers to Psyco too).


> And why don't you use islice?

You are right, but the purpose of light slices that I have suggested
is to avoid using islice so often. And currently Psyco doesn't digest
itertools well.


> D compiles to efficient machine code so Python is at a disadvantage
> even if you use the same syntax (see my first example). You can make
> the Python version faster, but beware of premature optimization.

This time I don't agree with this "premature optimization" thing. My
original Python version is just 5 lines long, it's readable enough,
and it's a part of a large library of mine of similar functions, they
must be fast because I use them all the time as building blocks in
programs.


> What I'dlike to see is a rope[1] module for Python.

People have already suggested it, and there's even an implementation
to replace Python strings. It was refused because... I don't know why,
maybe its implementation was too much more complex than the current
one, and it wasn't faster in all situations (and I think Guido wants
data structures that try to replace the basic built-in ones to be
faster in all situations and user-transparent too).

Bye,
bearophile


From ivan.illarionov at gmail.com  Fri May 16 21:48:53 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 01:48:53 +0000 (UTC)
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org>
Message-ID: <g0ldi5$2ine$1@news.mtu.ru>

On Wed, 14 May 2008 14:35:25 -0400, Poppy wrote:

> I've put together some code to demonstrate what my goal is though
> looping pixel by pixel it's rather slow.
> 
> import Image
> 
> def check_whitespace():
>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> 
>     size = im.size
> 
>     i = 0
>     whitePixCount = 0
>     while i in range(size[1]):
>         j = 0
>         while j in range(size[0]):
>             p1 = im.getpixel((j,i))
>             if p1 == (255, 255, 255):
>                 whitePixCount = whitePixCount + 1
>                 if whitePixCount >= 492804:  ## ((image dimensions 1404
>                 x
> 1404) / 4) 25%
>                     return "image no good"
>             j = j + 1
>         i = i + 1
> 
>     print whitePixCount
> 
>     return "image is good"
> 
> print check_whitespace()
> 
> 
> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>I need to write a program to examine images (JPG) and determine how much
>>area is whitespace. We need to throw a returned image out if too much of
>>it is whitespace from the dataset we're working with. I've been
>>examining the Python Image Library and can not determine if it offers
>>the needed functionality. Does anyone have suggestions of other image
>>libraries I should be looking at it, or if PIL can do what I need?
>>

PIL will do this, use histogram() method of Image objects.

-- Ivan


From torriem at gmail.com  Mon May 12 00:09:11 2008
From: torriem at gmail.com (Michael Torrie)
Date: Sun, 11 May 2008 22:09:11 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
Message-ID: <4827C2E7.2040703@gmail.com>

Larry Hale wrote:
> ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> file... still no-go.  :/

It's often the custom of programs ported from unix to windows to use the
dll location as a key to find the other files that are typically in
share, or etc.  GTK, for example uses ../share and ../etc from the
location where the dlls are stored (if the dlls are in a folder called bin).

In this case I'd try making a folder in the Python25 folder called
"share" and put the contents of the gnuwin32 share/file stuff in there.
 Should look something like this:

c:/python25/share/file/magic.mime.mgc
c:/python25/share/file/magic
c:/python25/share/file/magic.mgc
c:/python25/share/file/magic.mime

Or, judging by a string I found in the dll itself, you might have to put
the files here:

c:/progra~1/File/share/file/magic

Although if such a path really is hardcoded into the dll, this is
certainly a bug, since it will fail on certain non-english windows systems.

Anyway, who knows.  Give these options a try.



From larzluv at hotmail.com  Sun May 11 21:51:28 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:51:28 -0700 (PDT)
Subject: list object
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
Message-ID: <4dbdd79b-3364-4fe1-9cd8-6ae5e1394309@d45g2000hsc.googlegroups.com>

On May 10, 12:39 pm, Gandalf <goldn... at gmail.com> wrote:
> my manual contain chapter about lists with python. when i try to copy
> paste :
>
> li = ["a", "b", "mpilgrim", "z", "example"] (1)
>
> it i get this errore:
>
> "TypeError: 'list' object is not callable"
>
> i was wondering if their is  any special module I should import before
> i use this function
>
> i know i ask foolish questions it's my first day with python and i
> have experience only with PHP and javascript, so please be patient
>
> thanks


To expand upon what others have already mentioned, and/or to explain
what's going on...

    li ==>> a label for a "list" (presume the author used it as short-
hand?); trying to set it to point-to/"equal"...

    ["a", "b", "mpilgrim", "z", "example"] ==>> THE LIST

        A "list" is a mutable (changeable in-place) container object.
See e.g.: http://www.diveintopython.org/native_data_types/lists.html

    (1) ==>> the Python interpreter will interpret this as if you're
attempting to "call" the list object (["a", "b", ...]) as if it were a
function/method


Indeed, the "(1)" is what's causing the problem, but it's -because-
the list *object* is, well, "not callable".  :)

As an aside, see what "li" contains if you do:

    li = ["a", "b", "mpilgrim", "z", "example"][1]

;)


Cheers!
-Larry Hale


From ivan.illarionov at gmail.com  Tue May 27 21:32:24 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 01:32:24 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
Message-ID: <g1icn8$r5$1@news.mtu.ru>

On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:

> Greetings, Ivan Illarionov.
> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
> 
>>> As I've said before - good programmers can write good code in any
>>> language.
> 
>> Yes, they can. But it may be harder to do for them in one language and
>> easier in another.
> 
> It's obvious lie. If you have clear mind and you know language you're
> using, there are absolutely NOTHING can deny you to write clear code.
> Even using forth postfix notation, I have no problem writing good code,
> it's as easy as writing bad code. And yes, I do see the difference.

No. Language does matter.


From casey.mcginty at gmail.com  Mon May 26 04:00:07 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 22:00:07 -1000
Subject: Fwd: Organizing a Python project
In-Reply-To: <ae3f58470805260058u2ba2815fnef106e00f0fb142@mail.gmail.com>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>
	<op.ubqp8mn1x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805260058u2ba2815fnef106e00f0fb142@mail.gmail.com>
Message-ID: <ae3f58470805260100q28252a36nb5a3426c1fd8f643@mail.gmail.com>

On Sun, May 25, 2008 at 4:51 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Sun, 25 May 2008 19:46:50 -0300, Casey McGinty <casey.mcginty at gmail.com>
> escribi?:
> > The '_' should indicate that any other modules using your package should
> import
> > that module.
>
> Not only using _package isn't very common - it goes against the general
> rule (this one very well established) that names with a single leading
> _underscore are private (implementation details).
> <http://mail.python.org/mailman/listinfo/python-list>


My mistake. I meant to write, "should *not*", as you pointed out.

- Casey
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From rdm at rcblue.com  Fri May 30 13:56:04 2008
From: rdm at rcblue.com (Dick Moores)
Date: Fri, 30 May 2008 10:56:04 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
In-Reply-To: <dullrich-0FBD1D.09572530052008@text.giganews.com>
References: <mailman.1689.1211986714.12834.python-list@python.org>
	<dullrich-0FBD1D.09572530052008@text.giganews.com>
Message-ID: <20080530175628.BCCB01E4005@bag.python.org>

At 07:57 AM 5/30/2008, David C. Ullrich wrote:
>In article <mailman.1689.1211986714.12834.python-list at python.org>,
>  Dick Moores <rdm at rcblue.com> wrote:
>
> > I've been using Ulipad, a free IDE mainly for Python, and written in
> > wxPython, for a couple of years, and think it's terrific. Now another
> > user, Kelie Feng, has made an 8-minute video showing it off. The
> > visual clarity of the video is remarkable. You can download it
> > (Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may
> > be necessary for your player, from <http://www.rcblue.com/u3/>.
>
>I skipped the video and tried Ulipad. Looks very interesting.
>
>The documentation I got is mostly in Chinese. Is there an
>English version somewhere?

F1 will open "UliPad Documentations". Check out the HowTo's and the 
FAQ. And subscribe to the Ulipad list at Google Groups 
(<http://groups.google.com/group/ulipad>). The main developer, 
Limodou, is in Beijing, but he's very quick in answering questions 
posed to the list.

Dick Moores



From tjreedy at udel.edu  Sat May 10 14:56:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 14:56:41 -0400
Subject: list object
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
	<3d881a310805101047s1cc9c803wb87805e8044b514c@mail.gmail.com>
Message-ID: <g04r59$ifd$1@ger.gmane.org>


"member thudfoo" <thudfoo at opensuse.us> wrote in message 
news:3d881a310805101047s1cc9c803wb87805e8044b514c at mail.gmail.com...
| On 5/10/08, Gandalf <goldnery at gmail.com> wrote:
| > my manual contain chapter about lists with python. when i try to copy
| >  paste :
| >
| >  li = ["a", "b", "mpilgrim", "z", "example"] (1)
| >
| >
| >  it i get this errore:
| >
| >  "TypeError: 'list' object is not callable"

| Remove the "(1)"

The '(1)' was almost certainly an 'equation number' or 'line label' added 
so the author could refer it in the text, like 'type line (1) into the 
interpreter and... .  This is a standard mathematical idiom, but sometimes 
confusing when there is not enough space between the equation and the 
label, and especially when the equation label *could* be part of the 
equation, as with Python.






From upton at virginia.edu  Wed May 28 14:48:36 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 28 May 2008 14:48:36 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805281148w11581481x4257af4a5f6f762b@mail.gmail.com>

On Wed, May 28, 2008 at 11:09 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
>> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>>
>> So what does this do exactly if the set throws an error?
>
> I think the catch should catch the error thrown by set, compare it to
> 0.1, the comparison will not return true because the error is not less
> than 0.1, and so the go-to to tinyanswer will not be taken.
>

The semantics you're describing aren't clear here.  I suppose that's
sort of reasonable, given that you haven't implemented it yet, but
let's think about it for a second.  You say the catch construct should
catch the error thrown by set, but there's no reason "set" itself
should throw any sort of error in the sense of an exception--in a
statement like "Set x to SomeFunctionThatCanBlowUp()", the semantics
should clearly be that the error comes from the function.  In a simple
addition statement, that makes no sense.  So then I considered that
maybe you meant the error in the sense of some determination of
floating point roundoff error, but that can't be it, since you've
claimed recently a big win over Python with FT in that it has no
roundoff error.  So what, exactly, is the error you could even be
catching in that?  Assuming the answer is "You're right, there's no
actual error that could generated by that assignment," there are two
options: the compiler optimizes it away, or you throw a compile-time
error.  The latter makes more sense, as someone trying to catch an
exception where one can't possibly exist probably indicates a
misunderstanding of what's going on.

> ...  That's why C had to
> resort to the confusing "=" vs "==" notation -- to disambiguate the
> two cases.  The "catch" keyword unambiguously alerts the reader that
> the parenthesis contain a statement (or a whole list of statements).
>

However, I think overloading your catch error types to include objects
(or integral values, I guess, your example below isn't clear) along
with real values (ignoring the bit above about whether floating-point
assignment could throw an error) makes things confusing.  It's nice
that "catch(stuff)" indicates that there's one or more statements
inside, but so does indentation in Python, bracketing in C/C++,
Begin/End in <insert language here>, and so forth, but it doesn't give
any indication to what could come out and ideally, only one thing (or
its descendants in a type hierarchy) can come out.  (I suppose this
can be solved by overloading your comparison operators.)  Beyond that,
I think you would want a good mechanism for comparing ranges of values
if you want to make exceptions/errors real-valued.

>> For that matter, is there any way to distinguish between different errors
>> and only catch particular ones?
>
> I think the catch function should catch all of the errors (and the non-
> error result if no error occured), so I think distinguishing the error
> would have to come after.  Maybe something like:
>
> Set result to catch(read x from "input.txt".).
> If result = dividebyzeroerror then ... else throw result.
>
> I'm open to alternate suggestions, though.
>


From skunkwerk at gmail.com  Tue May  6 14:41:07 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Tue, 6 May 2008 11:41:07 -0700 (PDT)
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
	<65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>
	<mailman.621.1210027504.12834.python-list@python.org>
Message-ID: <ea882cb3-340d-4cee-a1c0-3264eed86f63@p25g2000pri.googlegroups.com>

On May 5, 3:44?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 05 May 2008 13:02:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
>
>
> > On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
> >> > i'm redirecting the stdout & stderr of my python program to a log.
> >> > Tests i've done on a simple program with print statements, etc. work
> >> > fine. ?however, in my actual program i get weird output like this:
>
> >> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> >> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> >> > if any
> >> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
>
> >> Try this simplified example and see by yourself:
>
> >> import sys
>
> >> class Write2Log:
> >> ? ? ?def write(self, x):
> >> ? ? ? ? ?sys.__stdout__.write('[%s]' % x)
>
> >> sys.stdout = Write2Log()
>
> >> print "Hello world!"
> >> age = 27
> >> name = "John"
> >> print "My name is", name, "and I am", age, "years old."
>
> > thanks Gabriel,
> > ? ?i tried the code you sent and got output like the following:
> > [My name is][][john][][and I am][][27][][years old.]
>
> > it doesn't really help me though. ?does this have any advantages over
> > the syntax i was using?
> > are there any limits on what kind of objects the logger can write? ?ie
> > ascii strings of any length?
>
> The example doesn't use any logger, so loggers aren't the problem here, ok?
>
> The write function above puts square brackets [] around anything it receives. This way you can see exactly how write() is called: once per *item* in the print statement, plus once per comma used (with an space character that you didn't copy correctly).
>
> Back to your original code, you have to call logger.debug with a *line* of text, but you are calling it with many small pieces - that's the problem. Accumulate output until you see a '\n' - then join all the pieces into a single, complete line and finally call logger.debug
>
> --
> Gabriel Genellina

thanks Gabriel,
   i wrote the function below, but am now getting an "Error in
sys.exitfunc:" error (which disappears when i comment out the last two
lines below):

class write2Log:
        def write(self, x):
		if x!=',':#ignore if a comma
			if str(x).count('\n')==0:
				buffer += str(x)
			else:
				list = str(x).split('\n')
				logger.debug(buffer)
				buffer = ""
				for text in list:
					logger.debug(text)

sys.stdout = write2Log()
sys.stderr= write2Log()

any ideas what might be wrong?
thanks again


From xahlee at gmail.com  Wed May 21 12:28:43 2008
From: xahlee at gmail.com (Xah)
Date: Wed, 21 May 2008 09:28:43 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
	<c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com>
Message-ID: <6c89401d-992c-44a2-b650-f28b2d2d537f@f24g2000prh.googlegroups.com>

alex23 wrote:
?No, what was generally rejected was the idea that *you* could bring
more clarity to the documentation, based on the complete absence of it
in your posts & "essays". Basically, noone wanted docs that would
randomly degenerate into ad hominem accusations of elitism aimed at
the module authors.?

Dear Alex moron number 23,

The art of writing takes many forms.

Let's take, the hallowed name Shakespeare.

Imagine, we injest his writing style into modern journalism. What is
the resulting quality? It would be condemned as the worst journalism
possible. Imprecise, logorrhea, obscure, and in general, much ado
about nothing.

On the other hand, if we apply the spirit of scientific report into
poetry, what is the resulting quality? Dry, inert, dead. A man without
a cock, a woman without tits.

You see, i had to craft my style to fit occasions. In dealing with
newsgroup morons like yourself, the proper style is to infuse insult
with fanfare.

Further readings:

The Tragedy Of Titus Andronicus
 http://xahlee.org/p/titus/titus.html

Politics and the English Language
 http://xahlee.org/p/george_orwell_english.html

English Lawers (or, how to master writing)
 http://xahlee.org/UnixResource_dir/writ/english_lawers.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From chris.lyon at spritenote.co.uk  Tue May  6 05:53:08 2008
From: chris.lyon at spritenote.co.uk (wyleu)
Date: Tue, 6 May 2008 02:53:08 -0700 (PDT)
Subject: parameters to lambda's executed at run time.
Message-ID: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>

I'm trying to supply parameters to a function that is called at a
later time as in the code below:

llist = []

for item in range(5):
    llist.append(lambda: func(item))

def func(item):
    print item

for thing in llist:
    thing()

which produces the result

IDLE 1.2.1
>>> ================================ RESTART ================================
>>>
<function <lambda> at 0xb716356c>
<function <lambda> at 0xb71635a4>
<function <lambda> at 0xb71635dc>
<function <lambda> at 0xb7163614>
<function <lambda> at 0xb716364c>
>>> ================================ RESTART ================================
>>>
4
4
4
4
4
>>>

How can one allocate a different parameter to each instance of the
function rather than all of them getting the final value of the loop?



From kyosohma at gmail.com  Sun May 18 13:04:42 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sun, 18 May 2008 10:04:42 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com> 
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>
Message-ID: <cc3d8639-9f34-4d58-a68e-f9302faa354e@t54g2000hsg.googlegroups.com>

On May 17, 10:13?am, eliben <eli... at gmail.com> wrote:
> On May 17, 3:23 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 17, 4:42 am, eliben <eli... at gmail.com> wrote:
>
> > > Hello,
>
> > > I'm getting into Python now after years of Perl, and as part of my
> > > research I must understand how to do some common tasks I need.
>
> > > I have a bunch of Windows PCs at work to which I want to distribute an
> > > application I've developed on my PC. All these PCs have Python 2.5
> > > installed.
>
> > > If my application contains only code I've developed, I simply zip its
> > > directory with .py files and send it to everyone, who can then use it
> > > by running the entry-point .py file. However, what if I've installed
> > > some 3rd party modules on my PC, and my application uses them (for
> > > example pyparsing, PiYAML and some others) ? I don't want to manually
> > > install all these packages (there may be dozens of them) on all those
> > > PCs (there may be dozens of those too). What is the best method I can
> > > use ? Naturally, I want all the non-standard packages my app uses to
> > > be detected automatically and collected into some kind of convenient
> > > distributable that is easy to pass around and run.
>
> > > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > > executables, and I don't want to distribute those all the time. I much
> > > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > > Thanks in advance,
> > > Eli
>
> > You might want to check out Buildout. It allows you to run all that
> > stuff in it's own virtual world, so to speak. I'm planning on playing
> > with it this week.
>
> I looked at its examples and I'm not sure it's what I need. It seems
> useful for other cases though.
>
> > Also, there's this site which has collected the various means of
> > distributing Python apps:
>
> >http://www.freehackers.org/Packaging_a_python_program
>
> This page only talks about the packagers that create .exe files that
> don't need Python installed.
>
> Is there a simple way to find out which packages are used by my
> script ?
>
> Eli

I'm fairly certain you can use that Freeze application to do the dirty
work for you. Or you can just distribute the pyc files...I've heard
that works somehow too.

Mike


From clyfish at gmail.com  Wed May  7 23:11:04 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Wed, 7 May 2008 20:11:04 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<0c999d92-e3e5-4f5c-b636-73739abd675a@1g2000prg.googlegroups.com>
Message-ID: <482d3eed-a7ff-4419-9340-64b7809beea0@n1g2000prb.googlegroups.com>

On 5?7?, ??2?41?, alito <alito... at gmail.com> wrote:
> On May 6, 7:19 pm, clyf... at gmail.com wrote:
>
> > In cmd, I can use find like this.
>
> > C:\>netstat -an | find "445"
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
>
> > C:\>
>
> > And os.system is OK.>>> import os
> > >>> os.system('netstat -an | find "445"')
>
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
> > 0
>
> > But I don't know how to use subprocess.Popen to do this.
>
> > from subprocess import Popen, PIPE
>
> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> > print p2.stdout.read()
>
> Get rid of the extra quotes.  ie:
> p2 = Popen(['find',  '445'], stdin = p1.stdout, stdout = PIPE)
>
> The quotes on the command line and on the os.system call are consumed
> by the shell.  The program doesn't see them.

You must be a linux user:)

I guess, in windows, the quotes are consumed by the c runtime library.
Mayby the "find" in windows doesn't use the argc/argv but the windows
API GetCommandLine().

I wrote a c program to prove it.

#include <windows.h>
#include <stdio.h>

int main(int argc, char **argv) {
    int i;

    printf("%s\n", GetCommandLine());
    for (i = 0; i < argc; ++i)
        printf("%d: %s\n", i, argv[i]);

    return 0;
}

The output is:
C:\>test 1 2 "3"
test 1 2 "3"
0: test
1: 1
2: 2
3: 3

C:\>

Notice that, GetCommandLine() does not consume the quotes, but the
(char **argv) does.


From gagsl-py2 at yahoo.com.ar  Fri May  2 12:30:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 13:30:24 -0300
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
Message-ID: <op.uajb4yrtx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 10:30:03 -0300, Nick Craig-Wood <nick at craig-wood.com>  
escribi?:

> As for where to store it, I use os.path.expanduser("~") to find the
> base directory and a bit of platform specific code.
>
> Something like this snippet
>
>     self.is_windows = sys.platform == 'win32'
>     self.home = os.path.expanduser("~")
>     if self.is_windows:
>         self.config_dir = os.path.join(self.home, "Application Data",  
> self.NAME)
>     else:
>         self.config_dir = os.path.join(self.home, "."+self.NAME)
>     if not os.path.isdir(self.config_dir):
>         os.makedirs(self.config_dir, mode=0700)
>     self.config_file = os.path.join(self.config_dir, "config")

Please don't do that if you distribute your programs. "Application Data"  
is a localized name, like "Program Files" and all special folders. On my  
Spanish version of Windows, they're "Datos de programa" y "Archivos de  
Programa" respectively, and the user may choose to move them to another  
location.
Use SHGetFolderPath to obtain the path; see  
http://msdn.microsoft.com/en-us/library/bb762181(VS.85).aspx

-- 
Gabriel Genellina



From kyrie at uh.cu  Wed May  7 16:39:30 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 7 May 2008 16:39:30 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805072119.30744.onsen-neko@gmx.net>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
Message-ID: <200805071639.30414.kyrie@uh.cu>

On Wednesday 07 May 2008 03:19:30 pm Daniel Marcel Eichler wrote:
> Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:
>
> Well, no. It's a litte different. Interfaces force to implement methods.
> Simple inheritance with method-stubs can't garantee that a specific
> method is reimplementat in a sub-class. Interfaces work at
> compile-time, while method-stubs raise at their first call, so in worst
> case, never (when the developer is available).

<Pseudo-java code>
class MyClass implements MyInterfaceWithPassMethod {
     function Pass() {
     }
}
</pseudo-java code>

There you have it, interfaces are not enough to ensure that the implementors 
actually implement the methods. They are useful for warning at compile time 
if there is a missing method, but nothing more. I believe you could achieve a 
very similar warning in python using some kind of Interface metaclass (too 
lazy right now to hack a proof of concept, but it looks doable).

I actually like the Interface concept... as portrayed by zope.Interfaces and 
pyprotocols (not the same thing, but I like them), and the ABCs (these, not 
so much). But Java interfaces are barely a replacement for multiple 
inheritance+abstract methods.

> That's the point. Interfaces garantee that a duck is a duck, an not only
> a chicken that quack.

Not really. (See the NotImplementedExceptions in .NET 1.1 and window forms, 
and/or their TabbedControl/TabPage background color attribute. Can't find 
them now, as I don't have .NET anymore, but I consider that an example of why 
the static typing are... overrated)

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From see at sig.below  Sat May 10 19:25:43 2008
From: see at sig.below (Barb Knox)
Date: Sun, 11 May 2008 11:25:43 +1200
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
	<48257ab7$0$29576$c83e3ef6@nn1-read.tele2.net>
Message-ID: <see-68826E.11254311052008@lust.ihug.co.nz>

In article <48257ab7$0$29576$c83e3ef6 at nn1-read.tele2.net>,
 Lars Rune N??stdal <larsnostdal at gmail.com> wrote:

> Hi,
> Finite automata works for "nested things".

Only in the special case when the depth of nesting is bounded ahead of 
time.  If it's unbounded then there is an unbounded amount of "stack" 
information that the automaton needs to remember, therefore a finite 
automaton cannot do it.

<pedantry>
That should be "Finite automata WORK ...", since "automata" is plural.
</pedantry>

> http://en.wikipedia.org/wiki/Automata_theory

-- 
---------------------------
|  BBB                b    \     Barbara at LivingHistory stop co stop uk
|  B  B   aa     rrr  b     |
|  BBB   a  a   r     bbb   |    Quidquid latine dictum sit,
|  B  B  a  a   r     b  b  |    altum viditur.
|  BBB    aa a  r     bbb   |   
-----------------------------


From deets at nospam.web.de  Tue May  6 08:53:06 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 14:53:06 +0200
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <68b2meF2s3iqjU1@mid.uni-berlin.de>

krumblebunk at gmail.com wrote:

> Hello gurus,
> 
> I am learning Python to take the place of Perl in my toolbox of bits
> and bobs, and writing something pretty simple in theory, but having a
> hard time in Python with it - I am using a 3rd party module, and I am
> sure the etiquette of this channel states that this is pure Python
> questions only, but please bare with me in light of this, as my
> question does indeed relate to Python only.
> 
> I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
> module), and when it returns the result, I am pulling it out as such:
> 
> try:
>     sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
> except pg.InternalError:
>     print "Failed to execute SQL: %s" % sql
>     exit
> 
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result
>     f=dict(foo)
>     for k in f.iteritems()
>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.
>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.
> 
> This breaks spectacularly -
> 
> any ideas?

Use the module "re" to create regular expressions & out of these
mather-objects that will give you what you need.

The idiom is roughly translated to this:

m = re.search(r"^Hostname')
if m:
   ...

Diez


From tjreedy at udel.edu  Sun May 25 21:43:22 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:43:22 -0400
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <g1d4jo$h0g$1@ger.gmane.org>


<miller.paul.w at gmail.com> wrote in message 
news:d7549dfd-6770-4924-8f0c-1746642bd8a4 at k37g2000hsf.googlegroups.com...
| Is there any place outside the actual C source for Python that has
| information about the performance of Python's built-in operations?

Unfortunately no.  Guido does not want to put guarantees in the language 
definition, so there is no urgency to document this.  An auxiliary doc 
might be accepted.  But the people who could write such a thing are busy 
doing otherwise.  Certainly, no one has volunteered to write *and update* 
such. 





From kyosohma at gmail.com  Sat May 10 15:28:53 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 10 May 2008 12:28:53 -0700 (PDT)
Subject: Is there a PyPI API?
References: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com> 
	<4825F62C.9050407@v.loewis.de>
Message-ID: <f49a80be-e185-41b8-ae12-0d9c19953c48@x41g2000hsb.googlegroups.com>

On May 10, 2:23 pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > I just can't figure out how to get the metadata, I guess.
>
> See
>
> http://wiki.python.org/moin/PyPiXmlRpc
>
> Regards,
> Martin

Ah-so. Most helpful, Martin. Thanks a lot!

Mike


From cjames at callone.net  Mon May  5 08:31:35 2008
From: cjames at callone.net (c james)
Date: Mon, 05 May 2008 07:31:35 -0500
Subject: Problems with psycopg2
In-Reply-To: <5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>
References: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
	<5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>
Message-ID: <fvmun7$otn$1@ger.gmane.org>

David Anderson wrote:
> The thing is this query works fine on the console through psql, but not 
> in my code? can anyone explain me why?
> 
> On Thu, May 1, 2008 at 9:31 PM, David Anderson <zerty.david at gmail.com 
> <mailto:zerty.david at gmail.com>> wrote:
> 
>     Hi all
>     I have this function:
>     def checkName(self, name):
>             cur = self.conn.cursor()
>          
>             sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
>             cur.execute(sql)
>             rows = cur.fetchall()
>            
>             if rows == "[]":
>                 self.insert()
> 
>     It seems to work fine, But I'm getting this exception:
>     psycopg2.ProgrammingError: current transaction is aborted, commands
>     ignored until end of transaction block
>     at: cur.execute(sql)
> 
>     What's the problem?
>     thx
> 
>     ps: fn_pat is the column of the db, name is the string passed in the
>     function parameter
> 
> 
> 
> ------------------------------------------------------------------------
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

Does `name` happen to have an apostrophe in it?  You may want to look at 
using bind variables.

cur.execute("SELECT * from patient WHERE fn_pat=%(name)s",
             {'name': name})


http://wiki.python.org/moin/DbApiCheatSheet
http://mail.python.org/pipermail/python-list/2005-March/314154.html



From http  Fri May  2 03:28:40 2008
From: http (Paul Rubin)
Date: 02 May 2008 00:28:40 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <7xbq3pjhav.fsf@ruckus.brouhaha.com>

AlFire <spamgrinder.trylater at ggmail.com> writes:
> But I still can not believe that +=1 is not a thread safe operation.

In CPython I believe it is thread safe, because of the global
interpreter lock.  Thread switches can happen only between bytecode
executions, not in the middle of a bytecode, even though executing a
bytecode can take several machine instructions.


From conrad at lewscanon.com.invalid  Fri May 30 19:33:22 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Fri, 30 May 2008 19:33:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <6abgirF358rgoU1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<6abgirF358rgoU1@mid.individual.net>
Message-ID: <u92dncc7VuoxE93VnZ2dnUVZ_hydnZ2d@comcast.com>

Gordon Etly wrote:
> Lew wrote:
>> John Thingstad wrote:
> 
>>> Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> I don't like the style, but many do.
> 
>> Please exclude the Java newsgroups from this discussion.
> 
> Why? Do you speak for everyone in that, this, or other groups?

I don't know why you'd even want to impose your Perl conversation on the Java 
group in the first place, troll.

Plonk.

-- 
Lew


From dullrich at sprynet.com  Fri May 16 11:58:46 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 16 May 2008 10:58:46 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
Message-ID: <7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>

On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
<gagsl-py2 at yahoo.com.ar> wrote:

>En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich <dullrich at sprynet.com> escribi?:
>
>> Having a hard time phrasing this in the form
>> of a question...
>>
>> The other day I saw a thread where someone asked
>> about overrideable properties and nobody offered
>> the advice that properties are Bad. So maybe we've
>> got over that. I suppose properties could have
>> Bad consequences if a user doesn't know they exist
>> and think that a certain property of an object is
>> just an ordinary attribute. But that applies to
>> almost any aspect of any language.
>
>Which "bad consequences" are you thinking of? 

Didn't have anything specific in mind - there I was
just playing devil's advocate. I've seen a lot of people
here say things like "properties should only be used
when refactoring" without any explanation that I could
see of why properties were bad things. I was referring
to whatever problems they had in mind.

>Apart from the user not being aware of the complexity of certain operations, or a getter/setter very time-consuming (in that case I'd use public getXXX/setXXX functions instead, to emphasize that "something" is happening, not just an attribute lookup)
>
>> If a person comes from, say, Object Pascal (Delphi)
>> then properties are hard to live without. The
>
>You should read the article "Python is not Java" if you haven't done it yet.
>http://dirtsimple.org/2004/12/python-is-not-java.html

I suspect you misunderstood my point there. I actually read that
article years ago. Been using Python for years. I'd never confuse
it with OP, I promise (luckily I don't know any Java and don't
intend to). I really didn't express what I meant very well - what
I should have said was more like "If you're accustomed to properties
from a language like OP they seem like a very useful addition to
Python".

Looking at the article it seems like two points are relevant.
(i) I'm well aware that chains of attribute accesses don't
get compiled away in Python the way they do in OP.

(ii) Regarding the bit about how getters and setters are
evil, and it's also bad to wrap things in properties when
simple attributes would do. Yes. Thanks for pointing
that out, but I wouldn't do that - using a property where
a simple attribute would do would be stupid. But they
_can_ be much nicer than having to use explicit getters
and setters, in cases where a simple attribute won't do.

I got started on this thinking about making myself a
nicer interface (nicer-seeming to me) to the wxPython
grid object. Being able to say

  grid[row, col] = value

seems much nicer and more natural than

  grid.SetCellValue(row, col, value)

(yes, _that_ one is just __get(set)item__,
no property needed), just as 

  window.pos = (x,y)

seems more natural than

  window.SetPos(x,y);

in these cases the work involved in changing the cell
value or the window position is going to make the
extra overhead of the property interface irrelevant.

>> other day I decided I wanted what OP calls an
>> "indexed property" or "array property". Couldn't
>> figure out how to make a _property_ behave that way.
>> So I read a little bit about descriptors, and a
>> few minutes later I had an indexedproperty thing
>> that works just like property, except it gives
>> an indexed property! This is just too cool.
>>
>> Why? For example, a Matrix should have a row[n]
>> property allowing things like
>>
>> m.row[0] = m.row[1] + m.row[2]
>>
>> Ok, you could do _that_ by just making row
>> an ordinary list of Row objects. But then
>> you'd have to say
>>
>> m.row[0] = Row([1,2,3])
>>
>> where I want to be able to say
>>
>> m.row[0] = [1,2,3]
>>
>> and have the Row created automatically.
>
>One could make *row* an object with a custom __getitem__/__setitem__ in this case. 

But then [see below]

>But I prefer to have as little magic as possible on my objects: if it says m.row[0] = [1,2,3] I 
>expect m.row[0] to actually *be* that list (whenever possible), and not any other object initialized 
>from the [1,2,3] arguments. (Maybe this is some overreaction against C++ "magic" constructors and such horrible things...)

Whatever - the idea here is that m.row[0] is going to walk and quack 
exactly like that list would, but also do other things that the liist
can't do, like you can add two of them.

(When you say anobject.aproperty = 2 you also expect aproperty to
be 2? But if aproperty is a property that's not necessarily so - this
seems like as much an argument against properties in general as
against my version. Or perversion, if you like.)

>> _Also_ with these indexed properties my Matrix
>> can have m.row[j] and m.col[k] that look exactly
>> the same to a client - we don't want to store a
>> list of rows internally and also store the same
>> data in a list of columns. Too cool.
>
>The same can be achieved having m.row and m.col be custom objects like I said above.
>
>> Hmm, none of that's a valid excuse for a post here.
>> Um, right, here we go: Anyone see problems or
>> possible improvements with the implementation
>> of indexedproperty below?
>
>Note that the property object (or your indexedproperty) is a *class* attribute. That is, shared among all instances.
>
>> class indexedproperty(object):
>>   def __init__(self, getitem=None, setitem=None):
>>     self.getitem = getitem
>>     self.setitem = setitem
>>
>>   def __get__(self, obj, owner):
>>     self.obj = obj
>>     return self
>
>Here is the problem. You can't store "obj" in "self" because it is shared among all instances. Your examples don't show any problem because all property accesses are immediately followed by a getitem access using the same object. Try this:
>
>x = AClass()
>y = AClass()
>x.cell[0,0] = 1
>print x.cell[1,1]   # output: 0
>y.cell[x.cell[0,0], x.cell[0,0]] = 2
>print y.cell[1,1]   # should be 2, still 0
>print x.cell[1,1]   # should still be 0, but changed, now 2

Eewps. I did realize that the "indexedproperty" object was going to be
shared, but I thought this sort of problem would be taken care of by
the fact that self.obj was reset each time __get__ was called. I
guess not.

_A_ workaround would be to simply not have indexedproperties
be class attributes, instead saying self.whatever =
indexedproprty(whatever) in __init__.

>A workaround would be to return another object in __get__ instead of self, which remembers the "obj" instance, or a closure, or...
>But I don't really see the point, it's a lot easier to use another object for .cell (it's more clear, doesn't break encapsulation, divides responsabilities...)
>
>class Matrix2x2(object):
>   def __init__(self):
>     self.cells = [[0,0], [0,0]]
>
>   def __setitem__(self, (row, col), value):
>     self.cells[row][col] = value
>
>   def __getitem__(self, (row, col)):
>     return self.cells[row][col]
>
>class AClass(object):
>   def __init__(self):
>     self.cell = Matrix2x2()

Well, something like this is where I was before coming up with
the indexedproperty thing. Unless I'm missing something, which
has happened before, what you write above can't work, because
self.cell has to know what Matrix2x2 created it so it knows
what AClass instance to modify when it's modified. (No, we
can't just leave the state information in self.cells; think of the
case of a Matrix with a row[] property and also a col[]
property - they have to be modifying the data stored in
the owning matrix.)

So it would have to be more something like (untested,
I don't have Python on this machine right now)

class Matrix2x2(object):
   def __init__(self, owner):
     self.owner = owner

   def __setitem__(self, (row, col), value):
     self.owner.data[row][col] = value

   def __getitem__(self, (row, col)):
     return self.owner.data[row][col]

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2(self)
     self.data = [[0, 0], [0, 0]]

(again, it doesn't have to be like that in this case,
but it does in the case where various "properties"
like cells are giving different sorts of access to the
same data, which data then has to be stored in AClass.)

And then that's the point to the indexedproperty;
the code passing data back and forth doesn't need
to be rewritten with each property, it's all done
inside the implementation of the indexedproperty
class. I realized that I could just use object attributes
instead, but it seems to me that indexedproperty
encapsulates the data-passing protcol once and for
all instead of requiring it to be redone each time.

Thanks for the comments, especially for pointing out
the bug. Before doing this I reproduced a Python
implementation of "property". Gonna have to look
that up instead of figuring it out to make sure I got
it right, then look at it to see why property
doesn't have the same problem... 
David C. Ullrich


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:48:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:48:01 -0300
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<m263tiapzt.fsf@googlemail.com>
	<fac0145c-d4c1-4faa-84b9-033b74047b0a@56g2000hsm.googlegroups.com>
Message-ID: <op.ua4qebr9x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 18:06:13 -0300, <yguan08 at gmail.com> escribi?:

> On May 13, 3:49?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> ygua... at gmail.com writes:
>> > I have trouble of obtaining the file size of a file because the
>> > fullpath exceeds 255 characters. I get this message with

> WindowsError: [Error 206] The filename or extension is too long: '\\\\?
> \\UNC\\LOSSSFS002\\NWE_TECHNICAL\\05. UK\\Schiehallion (204_25a)\
> \Amos&Burke_P559\\07. Technical (Subsurface)\\06. Well Planning\\Amos\
> \Daily Reports\\Wireline\\final_204_25a_8z\\204_25a_8z\\Run_1A\
> \HRLA_SP_DSI_PEX_HNGS_ECRD\\ANCILLARY\\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las'

In addition to starting with \\?\UNC\, the path has to be an Unicode  
string, and already normalized (that is, it cannot contain . nor ..  
components)

-- 
Gabriel Genellina



From jeffober at gmail.com  Thu May 22 08:06:32 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 22 May 2008 05:06:32 -0700 (PDT)
Subject: wsdl2py throwing error while creating client side code
References: <edd91cd3-789e-447f-ac92-03bf83d228ad@z16g2000prn.googlegroups.com>
Message-ID: <7df9d525-4fd5-4175-b5c4-67cab5184bed@e39g2000hsf.googlegroups.com>

Looks to me like you have the incorrect version of ZSI installed.


From paddy3118 at googlemail.com  Wed May 21 01:22:38 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 22:22:38 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<pecora-E07827.15095919052008@ra.nrl.navy.mil>
Message-ID: <3c04a0da-eb5c-4db6-8416-1b04ea9a4603@y38g2000hsy.googlegroups.com>

On May 19, 8:09 pm, Lou Pecora <pec... at anvil.nrl.navy.mil> wrote:
> In article <hifYj.43082$4B6.9... at newsfe14.ams2>,
>  Roel Schroeven <rschroev_nospam... at fastmail.fm> wrote:
>
>
>
> > Bruno Desthuilliers schreef:
> > > 1/ being interpreted or compiled (for whatever definition of these
> > > terms) is not a property of a language, but a property of an
> > > implementation of a language.
>
> > > 2/ actually, all known Python implementations compile to byte-code.
>
> > You keep saying that, and in theory you're right. But I'm still inclined
> > to disagree with it, since the practical reality is different. Python is
> > indeed compiled to byte code, but if you compare that byte code with
> > assembly code you'll see that there's a whole world of difference
> > between the two, largely because of the dynamical nature of Python. Fact
> > is that Python was designed from the start to run on a virtual machine,
> > not on the native hardware.
>
> > C OTOH was designed to be compiled to assembly code (or directly to
> > machine code) and as a result there are no (or virtually) no
> > implementations that interpret C or compile it to bytecode.
>
> But how about this C/C++ interpreter.  Dr. Dobbs article:  http://www.ddj.com/cpp/184402054.  Title and first two paragraphs:
>
> Ch: A C/C++ Interpreter for Script Computing
> Interactive computing in C
>
> Ch is a complete C interpreter that supports all language features and
> standard libraries of the ISO C90 Standard, but extends C with many
> high-level features such as string type and computational arrays as
> first-class objects.
>

If you still end up chasing pointers to implement your data structures
then its still hampered.


From ZeeGeek at gmail.com  Sun May  4 13:56:52 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Sun, 4 May 2008 10:56:52 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
Message-ID: <6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>

On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
>
> > Hi, what's the default localedir for gettext module on windows? In
> > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > order to make the translation work?
>
> %PYTHONHOME%\share\locale

I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
\LC_MESSAGES, but still no luck. The following is the code snippet I
use:

import gettext
gettext.install('testprogram', unicode = True)


From levlozhkin at gmail.com  Sat May  3 22:43:39 2008
From: levlozhkin at gmail.com (lev)
Date: Sat, 3 May 2008 19:43:39 -0700 (PDT)
Subject: Script Optimization
Message-ID: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>

Can anyone provide some advice/suggestions to make a script more
precise/efficient/concise, etc.?
The script verifies checksums, renames dirs/files, edits checksum
filenames, and htm page filenames, all from mp3cd format ([0-9][0-9]
[0-9]xxx.yyy) to something more usable: for ripping an mp3cd to disk
(everything works, but I think it's a bit bulky).

It's too long to post here (160 lines) so here's the link:
http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
(if that doesn't work: http://uppit.com/CKOYHE)

Thanks in advance,
lev


From mh at pixar.com  Wed May 21 03:54:32 2008
From: mh at pixar.com (mh at pixar.com)
Date: Wed, 21 May 2008 07:54:32 GMT
Subject: getting dir(x), but not as list of strings?
Message-ID: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>

I want to iterate over members of a module, something like:

    for i in dir(x):
        if type(i) == types.FunctionType: ...

but of course dir() returns a list of strings.  If x is a module,
how can I get the list of its members as their actual types?

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From casey.mcginty at gmail.com  Thu May 15 04:36:42 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Wed, 14 May 2008 22:36:42 -1000
Subject: Sanitised Newsgroup Feeds?
In-Reply-To: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <ae3f58470805150136q5c6590fdp5c1e558e32aea461@mail.gmail.com>

On Wed, May 14, 2008 at 7:47 PM, Paddy <paddy3118 at googlemail.com> wrote:

> Hi,
> Does anyone do a sanitised newsgroup feed? Something like what mail
> filters do for email?
>  <http://mail.python.org/mailman/listinfo/python-list>
>

Hi, I used to read the summary emails and had the same problem. I think the
best method is to subscribe to the list using an e-mail program that can do
spam filtering. Gmail gets rid of about 98% of the spam for me right now and
I mark any spam that gets by. Also, I would put a filter on the python
emails so they don't show up directly in your Inbox. Good luck.

- Casey
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From deets at nospam.web.de  Wed May 14 11:09:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 17:09:34 +0200
Subject: Rename field in Access DB
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
Message-ID: <690dmjF2tkmhnU1@mid.uni-berlin.de>

Iain King wrote:

> I'm manipulating an MS Access db via ADODB with win32com.client.  I
> want to rename a field within a table, but I don't know how to.  I
> assume there is a line of SQL which will do it, but nothing I've tried
> (from searching) has worked.
> Basic code:
> 
> import win32com.client
> connection = win32com.client.Dispatch(r'ADODB.Connection')
> DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> connection.Open(DSN)
> connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> doesn't work
> connection.Close()
> 
> Anyone know how to get this to work?

I don't think Access supports SQL on the DDL-side. Try looking into the
Access COM-Api, maybe you can get a reference to the table and modify it.

Diez


From asmodai at in-nomine.org  Fri May  2 03:54:05 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Fri, 2 May 2008 09:54:05 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <871w4l1cjj.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
Message-ID: <20080502075405.GS78165@nexus.in-nomine.org>

-On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>To my mind, the Python interpreter installed by a package as
>distributed with the OS *is* OS territory and belongs in /usr/bin/.

That's the difference with a distribution, such as Linux, and full OSes ,
such as BSDs or commercial Unix variants. They prefer to keep a pristine
state for the OS vendor files versus what the user can opt to install
himself, hence the /usr/bin - /usr/local/bin separation. Same for sbin, lib,
and so on. It effectively guarantees you can nuke /usr/local without ill
consequences for your OS.

Different philosophies, but after having spent more than 10+ years on too
many Unix and Unix-like systems I know the importance of platform
portability a bit too much and hardcoding a shebang sequence is not the
solution in general. Using env is the, arguably, best solution available.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
Felix, qui potuit rerum cognoscere causas...


From Lie.1296 at gmail.com  Sun May 18 09:23:49 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:23:49 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>

On May 9, 8:57?am, andrej.panj... at climatechange.qld.gov.au wrote:
> On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>
>
> > No, no, no, no, no!
>
> Geez. ?Go easy.
>
>
>
> > You have got it entirely wrong here. Your XOR function simply returns a
> > function which gives you the result of xoring the parameters AT THE TIME
> > WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set
> > cream and icecream (otherwise the call to XOR would have thrown an
> > exception) and at leas one was true. Try setting them both False at the
> > beginning:
>
> > >>> cream = False
> > >>> icecream = False
> > >>> topping = XOR( cream, icecream)
> > >>> cream = True
> > >>> icecream = False
> > >>> print topping()
>
> > False
>
> Ok. I understand this better now. ?I did say I found the documentation
> rather terse on this.
>
> > Using a lambda was a completely pointless exercise here, you could have
> > just returned the result directly:
>
> If I try out a new language, I try to exercise those parts of the
> language that are new to me. ?Now I saw lambdas, an interesting
> structure I hadn't seen before. So I tried them out. ?I get to learn a
> little at the same time as scripting. ?That was the "point". ?I only
> get to optimise my use of a language by trying out various corners of
> it.
>
>
>
> > def TFF(x,y,z) :
> > ? return x and not y and not z
>
> > AddOnly = TFF( options.AddAction, options.ReplaceAction,
> > options.DeleteAction )
> > DeleteOnly = TFF( options.DeleteAction, options.AddAction,
> > options.ReplaceAction )
> > ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
> > options.DeleteAction )
>
> > if not (DeleteOnly or AddOnly or ReplaceOnly):
> > ? print "Error: ?Exactly one of ?[ --add | --replace | --delete ]
> > allowed. "
> > ? parser.print_help()
> > ? exit
>
> > which boils down to:
>
> > if (options.AddAction + options.ReplaceAction +
> > ? ? ? ? options.DeleteAction) != 1:
> > ? ? print "Error: ..."
>
> Indeed, there are many ways this could be done. ?Some are more
> concise, some are more efficient. ?As I said, I did it the way I did
> it to try out lambdas. ?Your way achieves the result, rather elegantly
> I think, but teaches me nothing about using lambdas.
>
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.
>
> Both the responses offer lambda free alternatives. ?That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree. ?So what applications are lambdas suited to? ?I
> think the parameterised function model is one.
> What else?

Lambda can actually be safely removed from python and no other
features would be missing. It is always possible to create a def
version of any lambda, so lambda is useless. It is just a convenience
for the times where we're just too lazy to invent a name and find a
place to place the def, instead just inlining the function.


From amat at kabsi.at  Thu May 22 19:38:39 2008
From: amat at kabsi.at (Andreas Matthias)
Date: Fri, 23 May 2008 01:38:39 +0200
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
Message-ID: <vochg5-bo9.ln1@buckbeak.hogwarts>

inhahe at gmail.com wrote:

> actually i ddin't think about the fact that you're overloading dict, which 
> can already take multiple values in getitem

Oh, I didn't know that. I totally misinterpreted the error message.


> so how about
> 
> class crazy: pass
> 
> and then in your dict class:
> 
> def __getitem__(*args):

Apparently, args already is a tuple, so this should be:

  def __getitem__(self, args):

Is this documented somewhere? I couldn't find it anywhere.

Thanks.


Ciao
Andreas


From grante at visi.com  Mon May 12 13:48:51 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 12:48:51 -0500
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
Message-ID: <1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>

On 2008-05-12, Martin v. L?wis <martin at v.loewis.de> wrote:

> OTOH: do you plan to do any programming at all, in your
> life? If yes: consider using Python for every programming
> task you'll encounter - unless there are outside constraints
> demanding a different language. Python is flexible enough
> for *all* you programming needs (I claim);

Many, but not all.  Python doesn't work well on microprocessors
with a few thousand bytes of ROM and a few hundred bytes of
RAM.  Nor does it work well for writing device drivers for any
popular OS.

For windows/unix hosted user-space applications, Python is
pretty hard to beat.

-- 
Grant Edwards                   grante             Yow! I feel like I'm
                                  at               in a Toilet Bowl with a
                               visi.com            thumbtack in my forehead!!


From gagsl-py2 at yahoo.com.ar  Sat May 17 23:50:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 00:50:41 -0300
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>
	<2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>
	<d0bee883-f59a-4fc9-a17c-35c5d4ff6901@e53g2000hsa.googlegroups.com>
Message-ID: <op.ubbzmrn1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 17 May 2008 21:58:50 -0300, castironpi <castironpi at gmail.com> escribi?:

> I am still interested in this one, but doubt if anyone still reading.

I've not filtered you out *yet* - but that may happen very soon.

-- 
Gabriel Genellina



From krustymonkey at gmail.com  Sun May 11 19:21:47 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Sun, 11 May 2008 16:21:47 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
	<875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com>
Message-ID: <e1ba669d-f62d-42fb-811c-227351d030de@26g2000hsk.googlegroups.com>

On May 8, 7:29 pm, castiro... at gmail.com wrote:
> On May 8, 4:35 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
>
>
> > Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> > >> The thing is, I'm not using slots by choice.  I'm using the standard
> > >> lib "socket" class, which apparently uses slots.
>
> > > `socket` objects can't be pickled.  Not just because of the
> > > `__slot__`\s but because a substantial part of their state lives in
> > > the operating system's space.
>
> > Of course, if it makes sense to pickle sockets in the application, one
> > is can do so by defining __getstate__ and __setstate__:
>
> > class Connection(object):
> >     def __init__(self, host, port):
> >         self.host = host
> >         self.port = port
> >         self.init_sock()
>
> >     def init_sock(self):
> >         self.sock = socket.socket()
> >         self.sock.connect((host, port))
> >         ... init communication ...
>
> >     def __getstate__(self):
> >         # pickle self as a (host, port) pair
> >         return self.host, self.port
>
> >     def __setstate__(self, state):
> >         # reinstate self by setting host and port and
> >         # recreating the socket
> >         self.host, self.port = state
> >         self.init_sock()
>
> I, local, am mystified that you'd want to pickle a socket.  It's a
> live connection, which flies on a pocket dollar.  You don't want it on
> disk, do you?
>
> If you're running a net buoy through a cluster somewhere, do you want
> to drop a server and reconnect?  Is Amazon's EC2 up and running?
>
> Certainly no one was talking on the internet.  Were you?
>
> I don't think you hit anything but banks surfing the web, and the
> American dollar is notoriously stuffy.  Pump a wi-fi to a diner,
> though, and you're just talking more.  Where's Usenet?

The idea is a pre-fork socket server.  What I want to do is fork off
some child processes from the parent and use IPC to send the
connection object (via socket.accept()) over a pipe to one of the
preexisting child processes and have said child handle the
transaction.  Think Apache, if you want an example of what I'm trying
to do here.  This alleviates the process startup cost that occurs when
you fork.  If the socket object can't be serialized, is there another
way to go about handling this in python?


From shahmed at sfwmd.gov  Tue May 20 12:38:08 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Tue, 20 May 2008 12:38:08 -0400
Subject: Removing Space and "-" from a string
In-Reply-To: <93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com><mailman.1385.1211299351.12834.python-list@python.org>
	<93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20B0F17BF@EXCHVS01.ad.sfwmd.gov>

Thanks, works exactly what I needed.

-----Original Message-----
From: python-list-bounces+shahmed=sfwmd.gov at python.org
[mailto:python-list-bounces+shahmed=sfwmd.gov at python.org] On Behalf Of
s0suk3 at gmail.com
Sent: Tuesday, May 20, 2008 12:22 PM
To: python-list at python.org
Subject: Re: Removing Space and "-" from a string

On May 20, 11:02 am, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records
I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script
>
> Any help is highly appreciated.

string.replace('-', '').replace(' ', '')
--
http://mail.python.org/mailman/listinfo/python-list



From george.sakkis at gmail.com  Thu May  8 09:35:37 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 8 May 2008 06:35:37 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com> 
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
Message-ID: <3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>

On May 8, 2:58?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> George Sakkis wrote:
> > One of the few Python constructs that feels less elegant than
> > necessary to me is the del statement. For one thing, it is overloaded
> > to mean three different things:
> > (1) del x: Remove x from the current namespace
> > (2) del x[i]: Equivalent to x.__delitem__(i)
> > (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
>
> Note that the 'X = Y' construct has the corresponding three meanings:
>
> (1) x = 4 # Bind x to 4 in the 'current namespace'
> (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>
> What conclusion should we draw from that?

I think you're trying to imply that it is consistent with setting a
value (same with getting). I guess what bugs me about "del" is that
it's a keyword and not some universally well-known punctuation. Do you
you feel that Python misses a "pop" keyword and respective
expressions ?

(1) pop x: Remove x from the current namespace and return it.
(2) pop x[i]: Instead of x.pop(i)
(3) pop x.a: Equivalent to "_y=x.a; del x.a; return y"

George


From hdante at gmail.com  Fri May 16 10:25:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 07:25:15 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org> 
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com> 
	<695crbF303jk4U1@mid.uni-berlin.de>
Message-ID: <41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>

On May 16, 9:26?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > ?Did you consider gzipping your XML (or YAML) packets ? Would the
> > transfer time be acceptable in this case ?
>
> That would add even more to the overhead of transcoding the
> transportlayer. Switching from XMLRPC to a json-based protocol reduced

 Yes, that's why I suggested YAML.

> in a project of mine reduced the overhead 10-20fold - mainly because of
> reduced size and parsing efforts.

 I don't think so. It probably just the reduced size (check if the
json file is around 10 times smaller).

 I believe the server will be mostly I/O-bound, ie, most overhead will
be in the data link/physical layers. The compression/parsing time (a
few microseconds) should be a small fraction of the total transfer
time (a few milliseconds). Even if the service is not I/O bound,
(considering the Youtube example) if there's significant traffic in
the server, the database access time should be the most significant.

 I have used compression for SOAP messages in a GPRS (~20kbps) link
and got similar performance improvements (the web server was set to
automatically compress the data).

>
> Diez



From jon+usenet at unequivocal.co.uk  Thu May  1 12:11:29 2008
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: Thu, 01 May 2008 11:11:29 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
Message-ID: <slrng1jqth.ltk.jon+usenet@snowy.squish.net>

On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> IMO .ini-like config files are from the stone age. The modern approach is 
> to use YAML (http://www.yaml.org). 

You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
and so comprehensively and completely fails to achieve its stated
main goal of being "readable by humans", that I had assumed it
was an April Fool along the lines of Intercal or brainf***.

I certainly wouldn't recommend it as being suitable for, well,
anything at all.

Or were you trolling and I missed the joke? ;-)


From pavlovevidence at gmail.com  Fri May 30 05:15:47 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 30 May 2008 02:15:47 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <734f0e6a-ce91-45f8-a0f2-e3cd4faacf6c@c65g2000hsa.googlegroups.com>

On May 29, 12:07 pm, allendow... at gmail.com wrote:
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.


New style, all the way.

The drawback you speak of for new-style classes I think is today more
of a drawback for old-style.  The problem is, when a newbie goes
looking for examples, there is a lot of code out there that uses
things like properties, type(instance), @staticmethods, and so on.
Those won't work, and will confuse the hell out of newbies, if you
teach them old-style.  OTOH, the examples out there that are written
for old-style usually still work for new-style classes.

The only significant issue, as far as I'm concerned, is the list of
bases.  Which is why, even if you only cover new-style classes, it's
important to at least mention that there used to exist old-style that
don't list any bases (in Python 2.x).  And then tell the user, "We're
not covering it, it's not something you need to worry about, and most
of the time you can and should add (object) and the code will still
work."  And leave it at that--let the interested newbie seek out more
information on their own.


Carl Banks


From jacob at cd.chalmers.se  Sat May 24 12:32:35 2008
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Sat, 24 May 2008 16:32:35 +0000 (UTC)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <g19fv3$3vl$1@gide.ita.chalmers.se>

In article <mailman.1532.1211644302.12834.python-list at python.org>,
David  <wizzardx at gmail.com> wrote:
>> I work in small increments, writing one test at a time, then some code,
>> then another test, then some more code, etc.  In fact, I take this to what
>> many people might call an extreme.
>
>Thanks for the replies.
>
>I've read about the TDD (and similar) approaches. Maybe I need to try
>it and get used to it, but there are a few things I don't like about
>it on a gut level. I'll try to enumerate my concerns here.
>
>Problem 1: You can only code against tests
>
>Basically, with TDD you write the tests first, then the code which
>passes/fails the tests as appropriate. However, as you're writing the
>code you will also think of a lot of corner cases you should also
>handle. The natural way to do this is to add them to the code first.
>But with TDD you have to first write a test for the corner case, even
>if setting up test code for it is very complicated. So, you have these
>options:
>
>- Take as much time as needed to put a complicated test case in place.
>- Don't add corner case to your code because you can't (don't have
>time to) write a test for it.
>- Add the corner case handling to the code first, and try to add a
>test later if you have time for it.

As you come up with the corner case, write a test for it and leave the implementation
for later. The hard part of coding is always defining your problem. Once it is
defined (by a test) the solution is just a matter of tidy work.

>Problem 2: Slows down prototyping
>
>In order to get a new system working, it's nice to be able to throw
>together a set of modules quickly, and if that doesn't work, scrap it
>and try something else. There's a rule (forget where) that your first
>system will always be a prototype, regardless of intent.
>
>With TDD, you have to first write the tests for the first version.
>Then when that first version doesn't work out, you end up scrapping
>the tests and the code. The time spent writing the tests was wasted.
>

Agreed. There is no good way of reusing your prototype code in TDD. You end
up having to throw your propotype away in order to have a proper tested
implementation in the end. Takes more time up front, but less time over the
lifecycle of the program you are building.

>Problem 3: Slows down development in general
>
>Having to write tests for all code takes time. Instead of eg: 10 hours
>coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>writing all the tests, and 10 on the code.

This is incorrect. It speeds up development in general. The debugging phase of
development becomes much shorter because the bugs are fewer and the ones you
have a much shallower. There are so many tests that reduce the scope in which
you have to search for the bug that it usually becomes trivial to find.

I have direct experience from this, getting my company to change to TDD about
10 months ago. Productivity has improved enormously. I'd say that we have cut
between 25 and 50% in development time.

>Problem 4: Can make refactoring difficult.
>
>If you have very complete & detailed tests for your project, but one
>day you need to change the logic fundamentally (maybe change it from
>single-threaded to multi-threaded, or from running on 1 server to
>distributed), then you need to do a large amount of test refactoring
>also. The more tests you have (usually a good thing), the longer it
>will take to update all the tests, write new ones, etc. It's worse if
>you have to do all this first before you can start updating the code.

No, this is a total misunderstanding. It makes refactoring much easier.
It takes a bit of time to refactor the affected tests for the module, but you
gain so much by having tests that show that your refactoring is not breaking
code that should be unaffected that it saves the extra time spent many times
over.

Introducing bugs because you missed some aspect in a refactoring is one of the
most common problems in non-TDD code and it is a really nasty quality
concern.
>
>Problem 5: Tests are more important than code
>
>You need to justify the extra time spent on writing test code. Tests
>are nice, and good to have for code maintainability, but they aren't
>an essential feature (unless you're writing critical software for life
>support, etc). Clients, deadlines, etc require actual software, not
>tests for software (that couldn't be completed on time because you
>spent too much time writing tests first ;-)).
>
The tests are as important as the code. As a customer, I don't think I'd buy
software today unless I know that it has been built using TDD. Certainly I am
ahead of the curve in this, but it won't be long before this will be required
by skilled organisations buying software and sooner or later the rest of the
world will follow.

Getting into a TDD mindset is hard work, but those who succeed produce better
software with less effort.

Jacob Hall??n

-- 


From mrkafk at gmail.com  Sat May  3 16:50:10 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 13:50:10 -0700 (PDT)
Subject: Daily WTF with XML, or error handling in SAX
Message-ID: <ab018c7e-7ad6-4ea2-bbc0-57140e804e28@25g2000hsx.googlegroups.com>


So I set out to learn handling three-letter-acronym files in Python,
and SAX worked nicely until I encountered badly formed XMLs, like with
bad characters in it (well Unicode supposed to handle it all but
apparently doesn't), using http://dchublist.com/hublist.xml.bz2 as
example data, with goal to extract Users and Address properties where
number of Users is greater than given number.

So I extended my First XML Example with an error handler:

# ========= snip ===========
from xml.sax import make_parser
from xml.sax.handler import ContentHandler
from xml.sax.handler import ErrorHandler

class HubHandler(ContentHandler):
    def __init__(self, hublist):
        self.Address = ''
        self.Users = ''
        hl = hublist
    def startElement(self, name, attrs):
        self.Address = attrs.get('Address',"")
        self.Users = attrs.get('Users', "")
    def endElement(self, name):
        if name == "Hub" and int(self.Users) > 2000:
            #print self.Address, self.Users
            hl.append({self.Address: int(self.Users)})

class HubErrorHandler(ErrorHandler):
    def __init__(self):
        pass
    def error(self, exception):
        import sys
        print "Error, exception: %s\n" % exception
    def fatalError(self, exception):
        print "Fatal Error, exception: %s\n" % exception

hl = []

parser = make_parser()

hHandler = HubHandler(hl)
errHandler = HubErrorHandler()

parser.setContentHandler(hHandler)
parser.setErrorHandler(errHandler)

fh = file('hublist.xml')
parser.parse(fh)

def compare(x,y):
    if x.values()[0] > y.values()[0]:
        return 1
    elif x.values()[0] < y.values()[0]:
        return -1
    return 0

hl.sort(cmp=compare, reverse=True)

for h in hl:
    print h.keys()[0], "   ", h.values()[0]
# ========= snip ===========

And then BAM, Pythonwin has hit me:


>>> execfile('ph.py')
Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)


>>> ================================ RESTART ================================

Just before the "RESTART" line, Windows has announced it killed
pythonw.exe process (I suppose it was a child process).

WTF is happening here? Wasn't fatalError method in the HubErrorHandler
supposed to handle the invalid tokens? And why is the message repeated
many times? My method is called apparently, but something in SAX goes
awry and the interpreter crashes.




From neerashish at gmail.com  Thu May  8 13:58:45 2008
From: neerashish at gmail.com (neerashish)
Date: Thu, 8 May 2008 10:58:45 -0700 (PDT)
Subject: Python Syntax and misspelled variable and method name checker?
Message-ID: <17130132.post@talk.nabble.com>



Is there a good Python Syntax and mis-spelled variable and method name
checker available.

I have been programming in python for last 6 months and misspelled variables
and method names have been bane of my python life. 

In complied languages, compiler checks for these mistakes. I come from Java
, C++ background. 

I use komodo as editor on mac. I use python 2.4

Please suggest some good tool and utilities.

thanks
Ashish
-- 
View this message in context: http://www.nabble.com/Python-Syntax-and-misspelled-variable-and-method-name-checker--tp17130132p17130132.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From deets at nospam.web.de  Mon May  5 07:47:18 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 13:47:18 +0200
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
Message-ID: <688af0F2pc3jjU1@mid.uni-berlin.de>

globalrev wrote:

> http://www.pygame.org/docs/ref/mixer.html
> 
> import pygame
> 
> #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> buffer=3072)  //it complained abiout words=
> so i guess its only the nbrs should be there//
> 
> pygame.mixer.init(22050, -16, 2, 3072)
> pygame.mixer.music.load("example1.mp3")
> pygame.mixer.music.play(loops=1, start=0.0)
> 
> 
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> <module>
>     pygame.mixer.music.load("example1.mp3")
> error: Couldn't read from 'example1.mp3'

Give it the full path to the MP3. Be aware of backward slashes + the need to
escape them.

Diez


From gagsl-py2 at yahoo.com.ar  Sat May 10 23:46:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 00:46:18 -0300
Subject: Free Memory
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
Message-ID: <op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 12:44:21 -0300, Patrick Mullen <saluk64007 at gmail.com> escribi?:

> I had some very interesting results with this code to do what is asked:
>
> for key in globals().keys():
>     del globals()[key]
> for key in locals().keys():
>     del locals()[key]

Removing items from locals() has no effect, at least on CPython. Local variables doesn't "live" on that dictionary, locals() is built on demand when required.
At module level, locals and globals are the same thing.

py> def foo():
...   x = 1
...   y = "hello"
...   print locals()
...   for key in locals().keys():
...     print "deleting", key
...     del locals()[key]
...   print locals()
...   print x, y
...
py> foo()
{'y': 'hello', 'x': 1}
deleting y
deleting x
{'y': 'hello', 'x': 1, 'key': 'x'}
1 hello

BTW, if you want to clear a dictionary, just use its clear() method. So a more compact form of your code would be: globals.clear().
Anyway I don't see why do you want to keep an empty module around - just remove it from sys.modules, and if nobody else holds a reference to it, it will be destroyed.

> It might be better to reverse the two steps, I didn't give it much thought.
> Anyway, when this is done, all of the builtins spill into globals and locals
> (since __builtin__ was deleted).  I thought that was interesting.

Sorry I don't understand you...

> It did have the effect that is asked for, although there may be more
> unintended consequences.  Also if any objects are attached to any of the
> builtins I expect they will still be around.

Your code removes all direct references to objects from the current module, it does not free memory "per se". There may be other references elsewhere. Objects are deleted (and memory freed) only when their reference count reaches zero.

-- 
Gabriel Genellina



From slesarev.anton at gmail.com  Tue May  6 15:42:26 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Tue, 6 May 2008 12:42:26 -0700 (PDT)
Subject: python vs. grep
Message-ID: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>

I've read great paper about generators:
http://www.dabeaz.com/generators/index.html

Author say that it's easy to write analog of common linux tools such
as awk,grep etc. He say that performance could be even better.

But I have some problem with writing performance grep analog.


It's my script:

import re
pat = re.compile("sometext")

f = open("bigfile",'r')

flines = (line for line in f if pat.search(line))
c=0
for x in flines:
    c+=1
print c

and bash:
grep "sometext" bigfile | wc -l

Python code 3-4 times slower on windows. And as I remember on linux
the same situation...

Buffering in open even increase time.

Is it possible to increase file reading performance?


From torriem at gmail.com  Mon May 12 08:54:35 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 12 May 2008 06:54:35 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>
Message-ID: <48283E0B.4060001@gmail.com>

Larry Hale wrote:
> Alternately, if one wishes to leave/place the magic files elsewhere,
> do like:
> 
>     >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
> \share\\file\\magic' ) # <-- spec where/what the file is
> 
> NOTE: Even if the "magic_file" location *is* specified, "mime = True"
> still works fine.  (Haven't checked, but I presume the source simply
> tacks ".mime" to the filename automagically.)  Obviously/also, one
> needn't specify the argument names if one uses proper argument order:
> magic.Magic( mime, magic_file )  :)
> 
> 
> THANKS SO MUCH, Michael, for your answers and helping me alone the
> way...  :)

Glad it's working for you.


From terry.yinzhe at gmail.com  Sat May 10 19:39:56 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sat, 10 May 2008 16:39:56 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
Message-ID: <7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>

On May 11, 7:22 am, frankdmarti... at gmail.com wrote:
> Class A inherits from class B.  Can anyone point me in the direction
> of documentation saying how to initialize an object of A, a1, with an
> object of B, b1?

This is called a 'factory'in design patterns. Search 'python factory',
you will get a lot of examples.

br, Terry


From zerty.david at gmail.com  Sun May 11 20:15:25 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sun, 11 May 2008 21:15:25 -0300
Subject: how to separate words from a string?
Message-ID: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>

Hi, how can I separate words from a sentence in a string? Like the
java.String.split method
I need something that gets an string "This is a sentence", and return to em
a list["This","is","a","sentence"]
Can anyone help?
Thx
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From pierre.gronlier at gmail.com  Fri May 23 04:04:28 2008
From: pierre.gronlier at gmail.com (ticapix)
Date: Fri, 23 May 2008 01:04:28 -0700 (PDT)
Subject: webcam (usb) access under Ubuntu
References: <cdd59c49-8bf3-496b-8b08-6e901572c85c@q27g2000prf.googlegroups.com>
	<66jlk1F2ju6c8U1@mid.uni-berlin.de>
	<b588790c-1c32-4e64-9690-fa42c69548a2@n1g2000prb.googlegroups.com>
	<66kkedF2l526dU2@mid.uni-berlin.de>
	<455760fb-8229-4be3-ba7f-7c41bdcd66de@a22g2000hsc.googlegroups.com>
	<362eb242-2adc-4d7b-9c0a-95e72f4b22b6@e67g2000hsa.googlegroups.com>
Message-ID: <6a228393-1b14-4c4e-9a39-b15a77270994@a1g2000hsb.googlegroups.com>

On 16 avr, 09:41, Berco Beute <cybe... at gmail.com> wrote:
> On Apr 15, 11:45 pm, Berco Beute <cybe... at gmail.com> wrote:
>
> > I've tried reinstalling gstreamer (for windows):
>
> >http://gstreamer.freedesktop.org/pkg/windows/releases/gstreamer/gstre......
>
> > but that didn't help. I get some complaints about 'libgstinterfaces'
> > as well...
>
> To be more precise, when doing an 'import gst' Python shell pops up an
> error dialog saying:
>
> "This application has failed to start because
> libgstinterfaces-0.10.dll was not found."
>
> 2B

You need to install gst-plugins-good too

--
pierre


From Scott.Daniels at Acm.Org  Wed May 21 23:07:25 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 21 May 2008 20:07:25 -0700
Subject: about python modules
In-Reply-To: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <e6OdnQob8PrBfKnVnZ2dnUVZ_sWdnZ2d@pdx.net>

srinivas wrote:
> ... i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
> 
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
> 
> pls help me friends how to do that.

An unmentioned possibility:
Create a file named "whatever.pth" (where the "whatever" is your
choice).  The contents of this file should be a line containing the
path to your directory (in your case a single line containing
"D:\programs\Functions" (w/o the quotes).
Put this file in your site-packages file (for windows in your case,
that is C:\Python25\Lib\site-packages


--Scott David Daniels
Scott.Daniels at Acm.Org


From benkasminbullock at gmail.com  Mon May 19 23:00:03 2008
From: benkasminbullock at gmail.com (Ben Bullock)
Date: Tue, 20 May 2008 03:00:03 +0000 (UTC)
Subject: pop langs website ranking
References: <41fbaf27-a80b-402b-b406-c048a65a8643@b64g2000hsa.googlegroups.com>
Message-ID: <g0terj$1i7$2@ml.accsnet.ne.jp>

In comp.lang.perl.misc xahlee at gmail.com <xahlee at gmail.com> wrote:
> In February, i spent few hours researching the popularity of some
> computer language websites.

One way to do such research is for you to publish the actual number of
hits on your website. It's also easy to analyze logfile data with free
tools like analog or awstats, and publish the number of unique
visitors, pages hit, bandwidth, etc. It would also be possible for you
to work out how accurate the Alexa numbers actually are compared to
the numbers you see in your logs.


From john106henry at hotmail.com  Tue May 13 18:22:44 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 15:22:44 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<mailman.1074.1210711800.12834.python-list@python.org>
Message-ID: <7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>

On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
> John Henry wrote:
> > Hi list,
>
> > I can't understand this.  The following import statement works fine:
>
> >     from PythonCard.templates.dialogs import runOptionsDialog
>
> > but this one fails:
>
> >     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> This kind of "dotted" name import only works for packages, and a
> directory is considered a package only if it contains a file name
> __init__.py.    Looking around my installation of PythonCard (on Linux)
> I see that most of those directories *do NOT* have a __init__.py, so
> they are not packages and cannot be imported that way.
>
> Of course this leaves unanswered the question of *how* you are supposed
> to import that code.   I've never used PythonCard so I can't help
> further, but I suggest looking at the documentation and examples
> supplied.  And perhaps waiting for someone with experience with
> PythonCard to answer.
>
> Gary Herron
>
> P.S. It is usually a waste of time to tell us that something fails
> without telling us *how* it fails.  (Cut and paste the error message
> always, and the traceback usually.)  If you don't, you will usually get
> a request to supply that information, and then have wast3ed the time for
> one full round of message to the group.  Even in this case, I'm only
> guessing how it failed for you.
>
> > I've checked and rechecked to make sure that the spellings are proper
> > and that the tools, the codeEditor directory, and codeEditor.py, and
> > the class CodeEditor all exists and yet idle keep complaining that it
> > can't import from PythonCard.tools.
>
> > What's going on?  (Running Python2.5 under WinXP).
>
> > Regards,
> > --
> >http://mail.python.org/mailman/listinfo/python-list

Thank you very much.  I didn't know about the __init__.py
requirement.  Appreciate it.


From matthieu.brucher at gmail.com  Tue May 13 14:05:14 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Tue, 13 May 2008 20:05:14 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805131105g3176a9c3qdad1ec30d5114b7d@mail.gmail.com>

So does every other compiler like gcc or interpreters like Python. What is
your point ?

Matthieu

2008/5/13 Dave Parker <daveparker at flamingthunder.com>:

> >  Notice that I said "free software", not "*** FREE *** software !!!!
> > 1!" (that is, free as in freedom, not free as in beer). Read again my
> > answer, considering this.
>
> I misread your meaning.  In a sense, Flaming Thunder is even more free
> than "free software".  Flaming Thunder doesn't place any restrictions
> on how you use your source code or the executables you create.  There
> is no GNU license that you need to worry about.
>
> On May 13, 11:06 am, hdante <hda... at gmail.com> wrote:
> > On May 13, 12:24 pm, Dave Parker <davepar... at flamingthunder.com>
> > wrote:
> >
> >
> >
> >
> >
> > > >  The "Flaming Thunder" looks promising, but without being free
> > > > software, it's unlikely it will create a large developer community,
> > > > specially considering both free general purpose and scientific
> > > > programming languages.
> >
> > > Perhaps.  Flaming Thunder is only $19.95 per year for an individual
> > > (and even less per individual for site licenses), which is less than
> > > the cost of just one book on Python.
> >
> > > I think that many people will find that Flaming Thunder is easier to
> > > use and understand than Python -- so for many people the amount of
> > > time they save will be worth more than the cost of Flaming Thunder
> > > (unless, of course, their time is worth $0).
> >
> > > Also, several users have rewritten their Python programs in Flaming
> > > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > > (Flaming Thunder compiles to native executables).  So again, since
> > > many people value their time at more than $0, I think that many people
> > > will find that Flaming Thunder is worth $19.95 per year.
> >
> > > Plus, me getting paid to work on Flaming Thunder is far more
> > > motivating than me not getting paid to work on Python.  This weekend,
> > > Python users will still be debating how to fix awkwardnesses in the
> > > languages (such as FOR loops where you're just counting the loops and
> > > not referencing the loop variable) -- but Flaming Thunder users will
> > > be getting work done using the REPEAT n TIMES constructs that I'll be
> > > implementing.
> >
> > > Python has been around about 15 years, yet still has those
> > > awkwardnesses.  Flaming Thunder has been out less than 6 months and
> > > those awkwardnesses are already getting fixed.  The difference: I
> > > can't afford to ignore users.
> >
> > > But the future is one of the hardest things to predict, so we'll see.
> >
> > > On May 13, 8:34 am, hdante <hda... at gmail.com> wrote:
> >
> > > > On May 13, 10:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> >
> > > > > On May 13, 8:32 am, Dave Parker <davepar... at flamingthunder.com>
> wrote:
> >
> > > > > > > Don't let yourself be irritated by castironpi
> >
> > > > > > I'm not the sort to get irritated by anyone.  There is value in
> all
> > > > > > interaction.
> >
> > > > > Not this interaction, I'm afraid.  What irritates *me* about
> > > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > > here.  If you go back to his postings from a year ago (and selected
> > > > > ones since), his comments are coherent and sensible.  These
> rambling
> > > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > > his idea of a joke.  But they are certainly not worth your time in
> > > > > trying to respond to them.
> >
> > > > > -- Paul
> >
> > > >  I don't think castironpi so annoying that I should filter its
> > > > messages. It would be enough if he were better tuned. He is much
> > > > smarter than the emacs shrink, for example. :-P
> >
> > > >  The "Flaming Thunder" looks promising, but without being free
> > > > software, it's unlikely it will create a large developer community,
> > > > specially considering both free general purpose and scientific
> > > > programming languages.- Hide quoted text -
> >
> > > > - Show quoted text -
> >
> >  Notice that I said "free software", not "*** FREE *** software !!!!
> > 1!" (that is, free as in freedom, not free as in beer). Read again my
> > answer, considering this.- Hide quoted text -
> >
> > - Show quoted text -
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From castironpi at gmail.com  Fri May  9 21:55:44 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 18:55:44 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org> 
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com> 
	<mailman.893.1210380967.12834.python-list@python.org>
Message-ID: <bcd03b34-f26f-472a-bbf8-b4a42c8cae1e@y38g2000hsy.googlegroups.com>

On May 9, 7:55?pm, St?phane Larouche <stephane.larou... at polymtl.ca>
wrote:
> > On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> > > On behalf of the Python development team and the Python community, I
> > > am happy to announce the third alpha release of Python 2.6, and the
> > > fifth alpha release of Python 3.0.
>
> After I installer Python 2.6a3, Matlab R2007a began having problems. When I
> start Matlab, it shows a window indicating that it is installing Microsoft
> Visual C++ 2005 Redistributable, which fails, and then Matlab closes. This
> problem did not happen with Python 2.6a2 and removing Python 2.6a3 solves the
> problem.
>
> Is anybody else having the same problem? Do you know what causes it? Is there a
> workaround?

That one might be a true, "Don't stampede the Python."  Numbers have
been known grow.  (...not that the numbers do.)  Bread and butter, new
butter.


From http  Sun May 11 22:37:06 2008
From: http (Paul Rubin)
Date: 11 May 2008 19:37:06 -0700
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <7xmymwuu25.fsf@ruckus.brouhaha.com>

Yves Dorfsman <yves at zioup.com> writes:
> import time
> y, None, d, None, None, None, None = time.localtime()
> 
> I know you can't assign anything to None, but I'm sure you get what I
> mean, a special keyword that means I don't care about this value.

You can just use a variable name than you ignore.  It's traditional to
use _ but it's not a special keyword, it's just a another variable name:

   y, _, d, _, _, _, _, _, _ = time.localtime()


From lists at cheimes.de  Fri May  9 05:36:01 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 11:36:01 +0200
Subject: RELEASED Python 2.6a3 and 3.0a5
In-Reply-To: <26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
References: <mailman.820.1210290618.12834.python-list@python.org>
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
Message-ID: <48241B01.8050009@cheimes.de>

Kay Schluehr schrieb:
> http://www.python.org/ftp/python/3.0/python-3.0a5.msi

> Error 404: File Not Found

> http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi

> Error 404: File Not Found

The Windows binaries usually take a while. I'm adding Martin to the CC
list. His is most like building the files today.

Christian




From deets at nospam.web.de  Thu May 29 06:03:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 12:03:00 +0200
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<613388153.20080528051020@freemail.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
Message-ID: <6a7dblF35fm1rU1@mid.uni-berlin.de>

> A good OO programmer could easily write good functional code.

You are aware that functional programming is *not* procedural or imperative
programming? 

http://en.wikipedia.org/wiki/Functional_programming

OO is *heavily* depending on state and state modification. I've seen OO
programmers weep over functional programming assignments. Which is not to
say that FP is in any sense bad - au contraire, knowing it is important
because it is a different school of thought that's very valuable to know
of. And Python allows for many of the FP concepts to be used. See map,
filter and other HOFs.

Diez


From gagsl-py2 at yahoo.com.ar  Sat May 24 23:52:50 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 00:52:50 -0300
Subject: Google Treasure solution in python - first time python user,
	help whats wrong
References: <44de619e-14f3-49d2-b336-a14e5dca12cd@e39g2000hsf.googlegroups.com>
Message-ID: <op.uboyecr2x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 05:40:26 -0300, x40 <marko.srepfler at gmail.com> escribi?:

> I try to learn python thru solving some interisting problem, found
> google trasure hunt,
> write first program ( but cant find whats wrong).

And what happens? You don't get the expected result? The program aborts with an exception? Or what?

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Sun May 18 06:09:57 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 18 May 2008 10:09:57 +0000 (UTC)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<482FF39A.5010604@v.loewis.de>
Message-ID: <g0ov9k$b3e$1@news.mtu.ru>

On Sun, 18 May 2008 11:15:06 +0200, Martin v. L?wis wrote:

> There is also the issue of aliases. Some call it Moscow, some Moskau,
> when it is really called ??????. Of course, the same issue exists for
> states: some call it Kalifornien, others California.

I don't see any issues here. Everybody call it "Moscow" when they speak
English and "??????" when they speak Russian. Calling it "??????" or
"Moskva" in English would be simply not correct and confusing.

-- Ivan



From sturlamolden at yahoo.no  Sun May 18 08:20:09 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 05:20:09 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<7ENXj.6906$255.106@bignews8.bellsouth.net>
Message-ID: <71dc01f3-0084-4878-a4f0-5792e2648f77@y21g2000hsf.googlegroups.com>

On May 18, 5:46 am, "inhahe" <inh... at gmail.com> wrote:

> The numbers I heard are that Python is 10-100 times slower than C.

Only true if you use Python as if it was a dialect of Visual Basic. If
you use the right tool, like NumPy, Python can be fast enough. Also
note that Python is not slower than any other language (including C)
if the code is i/o bound. As it turns out, most code is i/o bound,
even many scientific programs.

In scientific research, CPU time is cheap and time spent programming
is expensive. Instead of optimizing code that runs too slowly, it is
often less expensive to use fancier hardware, like parallell
computers. For Python, we e.g. have mpi4py which gives us access to
MPI. It can be a good advice to write scientific software
parallelizable from the start.

I learned Pascal my first year in college. When I started programming
Matlab, I brought with me every habits of a novice Pascal programmer.
Needless to say, my programs ran excruciatingly slow. I learned C just
to write faster "mex" extensions for Matlab. But eventually, my skills
improved and I found that my Matlab programs did not need C anymore.
It took me almost 3 years to unlearn the bad habits I had acquired
while programming Pascal. It is very easy to blame the language, when
in fact it is the programmer who is not using it properly.


















From chandran.ramu1 at gmail.com  Mon May 12 02:16:24 2008
From: chandran.ramu1 at gmail.com (chandran.ramu1 at gmail.com)
Date: Sun, 11 May 2008 23:16:24 -0700 (PDT)
Subject: hai friends
Message-ID: <c7e1096b-80d6-4799-9646-57cf2c89af4c@x19g2000prg.googlegroups.com>

hai dear,
"may all good things come into your life today and always"
www.goodhistory5.blogspot.com


From Tymoteusz.Jankowski at gmail.com  Fri May  9 05:13:34 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Fri, 9 May 2008 02:13:34 -0700 (PDT)
Subject: the lvalue curse? let's play with this crazy idea ;)
Message-ID: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>

I started playing with Python and love it since the very beginning,
programming using Python is so ...human-like? but one thing returns to
me almost everytime when I see/write the code


Let's take a look at two ways of thinking...
the standard one which is well-known and loved by almost everyone :)
and that crazy concept below which suprised evan me :wacko:

<code>
import time

ftime = time.time()
localtime = time.localtime(ftime)
localtime = list(localtime[:3])
localtime = [str(i) for i in localtime]
print '-'.join(localtime)
</code>

It's harder to read than the below concept, isn't?
Maybe I didn't used to this way of thinking yet. I hope it'll change
soon or i'll quit ;)


<almost code>
time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
-> '-'.join()
</almost code>

My example conclusion and not-ansewered-yet question...
-it's nice to read and choosing the good names to variables aren't so
important
-what is the purpose of the variables here? :)

I realize that there is no chance to implement it, but I really want
to share it :]

Peace,
T.

PS
forgive my my english
[shall I set it as a signature? ;) ]


From grahamjfeeley at optusnet.com.au  Thu May 29 04:23:03 2008
From: grahamjfeeley at optusnet.com.au (Graham Feeley)
Date: Thu, 29 May 2008 18:23:03 +1000
Subject: run a script in vista
Message-ID: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>

Hi, I have a script which runs in xp, however now I have upgraded to vista 
this script now does'nt work
Can someone help with this problem please ?
this is the start of the script

import cPAMIE
import cModalPopUp
import winGuiAuto as wga
import time, datetime
import os, sys, re
import mx.ODBC.Windows as odbc

appreciate any help  here
Regards
Graham



From gherron at islandtraining.com  Wed May 21 11:43:31 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 21 May 2008 08:43:31 -0700
Subject: getting dir(x), but not as list of strings?
In-Reply-To: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <48344323.1040401@islandtraining.com>

mh at pixar.com wrote:
> I want to iterate over members of a module, something like:
>
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
>
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?
>
> Many TIA!
> Mark
>
>   
Use the builtin vars to get a dictionary of names and associated objects. 

import sys
for name,ob in vars(sys).items():
  print name,type(ob)

Gary Herron



setrecursionlimit <type 'builtin_function_or_method'>
getfilesystemencoding <type 'builtin_function_or_method'>
path_importer_cache <type 'dict'>
stdout <type 'file'>
version_info <type 'tuple'>
exc_clear <type 'builtin_function_or_method'>
prefix <type 'str'>
getrefcount <type 'builtin_function_or_method'>
byteorder <type 'str'>
...



From wollez at gmx.net  Wed May  7 11:51:56 2008
From: wollez at gmx.net (WolfgangZ)
Date: Wed, 07 May 2008 17:51:56 +0200
Subject: What is the purpose of ptyhon in Windows
In-Reply-To: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <fvsj6s$n87$1@ger.gmane.org>

parag_paul at hotmail.com schrieb:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
> 
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
At least I'm living in a free country and nobody forces me to learn 
python. So I don't fully understand why you HAVE TO learn it. When your 
problems can be solved in a different programming language than you 
should be free to use whatever you like. And also why should it be 
forbidden to create a new programming language? Diversity and 
competition is usually not bad.



From garrickp at gmail.com  Tue May 20 14:48:46 2008
From: garrickp at gmail.com (Falcolas)
Date: Tue, 20 May 2008 11:48:46 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <34393ad5-59d1-4772-92c3-7e4d44a643c2@w4g2000prd.googlegroups.com>

On May 20, 12:34 pm, notnorweg... at yahoo.se wrote:

> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

To simply bypass the first line, do a readline() on the file object
before starting to process the file. To filter out particular lines
throughout the file, you can either do a check in the for loop and
continue if it is true, or create a generator which filters out
unwanted content.

untested:

fd = open(some_file)
fi = (x for x in fd if (x.search(':') < 0))
for line in fi:
    pass

It gets a bit more complicated if you want to actually split on
sentences, not lines.


From aspersieman at gmail.com  Thu May  8 08:24:37 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:24:37 +0200
Subject: POP connection timeout.
Message-ID: <4822F105.5050505@gmail.com>

Hi All

I have written an application that queries a POP mailbox and 
downloads messages. When the application tries to connect to the mail 
server, but takes too long (eg. longer than 60 seconds) I want to have 
it time out.

Something like

try:
   pop = poplib.POP3(POPHOST, POPPORT)
except someerror, err:
   print "Connecting to mail box has timed out:\n", err

I know that in python 2.5 I could pass an additional timeout parameter 
to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
TIMEOUTINSECONDS), but I am using python 2.4.

Can anyone help me implement this timeout functionality.

Regards

Nicol
-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 





-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From arnodel at googlemail.com  Thu May  8 05:22:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 8 May 2008 02:22:01 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com> 
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<Xns9A985A46AEA62duncanbooth@127.0.0.1>
Message-ID: <ce2982c0-755f-4d89-8f5c-9c32384ae05e@y38g2000hsy.googlegroups.com>



Duncan Booth wrote:
> Arnaud Delobelle <arnodel at googlemail.com> wrote:
>
> >
> >
> > George Sakkis wrote:
> >> One of the few Python constructs that feels less elegant than
> >> necessary to me is the del statement. For one thing, it is overloaded
> >> to mean three different things:
> >> (1) del x: Remove x from the current namespace
> >> (2) del x[i]: Equivalent to x.__delitem__(i)
> >> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
> >
> > Note that the 'X = Y' construct has the corresponding three meanings:
> >
> > (1) x = 4 # Bind x to 4 in the 'current namespace'
> > (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> > (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>
> I think you both missed a case:
>
>   (1b) global x; del x    # Remove x from global namespace
>   (1b) global x; x = 4    # Bind x to 4 in the global namespace

This is why you put 'current namespace' in quotes!  But all three of
us missed the case:

(1-3000) What about nonlocal?

> That Python is simple and consistent.

Seems reasonable to me.

--
Arnaud


From goldnery at gmail.com  Sat May 31 17:38:29 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 31 May 2008 14:38:29 -0700 (PDT)
Subject: Need Tutorial For the following lib
Message-ID: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>

Hi every one. I need comprehensive tutorial for the following
library :

1. pyWinAuto
2. winGuiAuto



Thanks in advance


From kyosohma at gmail.com  Fri May  2 09:32:56 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 06:32:56 -0700 (PDT)
Subject: Python documentation
References: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
Message-ID: <2713f3f1-55e0-42a7-94eb-e0bea505ce60@m45g2000hsb.googlegroups.com>

On May 2, 4:34 am, ad... at remembernobody.com wrote:
> Hello,
>
> I have been learning python for some time using the dive into python
> book. I am interested to know if anyone can recommend a book which
> covers more advanced topics like threading and potentially GUI style
> coding.
>
> Regards,
>
> Ronald

Lutz's book, "Programming Python" covers a lot of advanced topics,
including building various GUI-oriented programs with Tkinter. There's
also "Core Python Programming" by Chun, which has some good internals
stuff in it.

I prefer using wxPython for my GUI work, so I'll also recommend Robin
Dunn's "wxPython in Action".

Mike


From Sam.Dutton at itn.co.uk  Thu May 22 12:32:13 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Thu, 22 May 2008 17:32:13 +0100
Subject: Why is math.pi slightly wrong?
Message-ID: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>

I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
 
Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
 
I searched for this on the web and in this group and couldn't find anything -- but humble apologies if this has been asked before/elsewhere.
 
Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
WWW.ITN.CO.UK

P  Please consider the environment. Do you really need to print this email?
Please Note:

 

Any views or opinions are solely those of the author and do not necessarily represent 
those of Independent Television News Limited unless specifically stated. 
This email and any files attached are confidential and intended solely for the use of the individual
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If you have received this email in error, please notify postmaster at itn.co.uk 

Please note that to ensure regulatory compliance and for the protection of our clients and business,
we may monitor and read messages sent to and from our systems.

Thank You.


From gnewsg at gmail.com  Tue May 13 17:05:43 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 14:05:43 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1072.1210709797.12834.python-list@python.org>
Message-ID: <2567d557-b5cd-4b12-ad09-67f30ce1078d@b1g2000hsg.googlegroups.com>

On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
> >> We do not live in a pure world, Python isn't pure (practicality beats
> >> purity), and by attempting to send some data each time a .push*()
> >> method is called, there are measurable increases in transfer rates.
>
> >Good point. I'd like to ask a question: if we'd have a default
> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
> >such problem?
> >I've always found weird that asyncore has such an high default timeout
> >value.
> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>
> I'm not sure this is right. ?What timeout are we talking about? ?Twisted
> only wakes up when necessary.
>
> Jean-Paul

I'm talking about the asyncore.loop timeout parameter which defaults
to 30 (seconds).
I don't think that Twisted only wakes up when necessary (surely not by
using the select reactor).
Think about the schedule calls feature (reactor.callLater).
To have that work I guess that a continuous loop must always be kept
alive, regardless of the reactor used.

--- Giampaolo
http://code.google.com/p/pyftpdlib


From squareswallower at 1ya2hoo3.net  Fri May  9 23:19:19 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Fri, 9 May 2008 21:19:19 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com>
Message-ID: <g0347n$404$1@news.xmission.com>

On 2008-05-09 18:53:19 -0600, George Sakkis <george.sakkis at gmail.com> said:

> On May 9, 5:19?pm, umpsu... at gmail.com wrote:
>>>> What would be the best method to print the top results, the one's that
> 
>>>> had the highest amount of anagrams?? ?Create a new histogram dict?
>> 
>>> You can use the max() function to find the biggest list of anagrams:
>> 
>>> top_results = max(anagrams.itervalues(), key=len)
>> 
>>> --
>>> Arnaud
>> 
>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>> lists? ?Is there a way to specific top three w/ a max command??
> 
>>>> import heapq
>>>> help(heapq.nlargest)
> Help on function nlargest in module heapq:
> 
> nlargest(n, iterable, key=None)
>     Find the n largest elements in a dataset.
> 
>     Equivalent to:  sorted(iterable, key=key, reverse=True)[:n]
> 
> 
> HTH,
> George

I both the 'nlargest' and the 'sorted' methods.. I could only get the 
sorted to work.. however it would only return values like (3,  edam) 
not the list of words..

Here is what I have now.. Am I over-analyzing this?  It doesn't seem 
like it should be this hard to get the program to print the largest set 
of anagrams first...


def anafind():
	fin = open('text.txt')
	mapdic = {}
	finalres = []			# top answers go here
	for line in fin:
		line = line.strip()
		alphaword = ''.join(sorted(line))	#sorted word as key
		if alphaword not in mapdic:
			mapdic[alphaword] = [line]
		else:
			mapdic[alphaword].append(line)
	topans = sorted((len(mapdic[key]), key) for key in mapdic.keys())[-3:] 
  #top 3 answers
	for key, value in topans: 	#
		finalres.append(mapdic[value])
	print finalres



From mnikhil at gmail.com  Tue May 13 19:57:07 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 05:27:07 +0530
Subject: list.__len__() or len(list)
Message-ID: <g0d9sj$m58$1@registered.motzarella.org>

which one is better? and why?

__len__() is a built-in function of the list object and is updated along 
with the list object elements and will be useful incase the list is very 
huge.

len() is an external method again, which may require the processing 
cycles again.

Is it right?


From conradwt at gmail.com  Mon May 26 10:09:27 2008
From: conradwt at gmail.com (Con)
Date: Mon, 26 May 2008 07:09:27 -0700 (PDT)
Subject: Cannot Read MySQLdb docs within Python interpreter
Message-ID: <a5c7717d-22aa-40bc-981d-76766eb43d32@u12g2000prd.googlegroups.com>

Hi, I'm gettting a traceback when I attempt to read the MySQLdb docs
after installation on Mac OS X 10.5.2:

BEGIN TRACEBACK:

>>> help( "MySQLdb" )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/site.py", line 346, in __call__
    return pydoc.help(*args, **kwds)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1645, in __call__
    self.help(request)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1687, in help
    elif request: doc(request, 'Help on %s:')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1481, in doc
    pager(title % desc + '\n\n' + text.document(object, name))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 324, in document
    if inspect.ismodule(object): return self.docmodule(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1072, in docmodule
    contents.append(self.document(value, key, name))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 325, in document
    if inspect.isclass(object): return self.docclass(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1196, in docclass
    lambda t: t[1] == 'method')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1146, in spill
    name, mod, object))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 326, in document
    if inspect.isroutine(object): return self.docroutine(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 1257, in docroutine
    doc = getdoc(object) or ''
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/pydoc.py", line 82, in getdoc
    result = inspect.getdoc(object) or inspect.getcomments(object)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/inspect.py", line 521, in getcomments
    lines, lnum = findsource(object)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/inspect.py", line 510, in findsource
    if pat.match(lines[lnum]): break
IndexError: list index out of range

END TRACEBACK:

If anyone has any ideas as to how to resolve this issue, please feel
free to post the solution and thanks in advance.

-Conrad




From Scott.Daniels at Acm.Org  Sun May  4 19:41:34 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 04 May 2008 16:41:34 -0700
Subject: Please help - Tkinter not doing anything
In-Reply-To: <e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
Message-ID: <qrOdnX_7Y_Mi2oPVnZ2dnUVZ_u2dnZ2d@pdx.net>

s0suk3 at gmail.com wrote:
> On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>> .... I'm pasting the code in IDLE and using Windows XP....
> 
> Tkinter doesn't work if you type the statements in IDLE.... it doesn't 
 > work because IDLE is itself a Tkinter app.

Actually, _because_ IDLE is a Tkinter app,you can use it to
experiment with Tkinter in a very useful way.  The trick is that
you need to start idle with the "-n" (No subprocesses) switch.
This is so useful that I build a shortcut on my desktop to do exactly
this.  Using this shortcut you can see the effect of each action as
you type it, giving you an idea of exactly what must happen.

I'm assuming you are using Python 2.5 here (other versions have
related recipes, but slightly more complicated).
Right click on the desktop, and choose "New Shortcut."

For "Choose the location of the item", browse to (or type in)
     C:\Python25\pythonw.exe
Then (after your next) pick a name for your shortcut.
Right click on the resulting shortcut, and go to "properties"
Change the "Target" entry from:
     C:\Python25\pythonw.exe
to:
     C:\Python25\pythonw.exe -m idlelib.idle -n
Also, if you are like me, you'll want to change the "Start in" directory
to wherever you work on python code --so imports of your own stuff "just
work", and so "File open'" and "Save As" default to a "nice" directory.

The Idle you get with this "corrupts" more easily, since the "-n" says
"no subprocess."  Things like restarting the shell don't work.  _But_
Tkinter stuff is available (there is already a running mainloop).  You
can interactively do simple things a step at a time and watch the
results.  It is a _great_ way to experiment with Tkinter.


--Scott David Daniels
Scott.Daniels at Acm.Org



From robert.kern at gmail.com  Mon May 19 16:47:44 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 19 May 2008 15:47:44 -0500
Subject: arrays
In-Reply-To: <48313A7F.4050909@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
	<48313A7F.4050909@islandtraining.com>
Message-ID: <g0sp1g$5hg$1@ger.gmane.org>

Gary Herron wrote:
> 1.  Why have you flooded this news group with three identical copies of 
> a question under three different subject?  This is a (mild) bit of abuse 
> of the newsgroup.  One copy with a reasonable subject line is enough.

If you look at the dates, they are a few days old. I imagine he was having 
posting problems, and the messages finally worked their way out of whatever 
queue they were being held up in.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From darcy at druid.net  Mon May 12 16:17:45 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Mon, 12 May 2008 16:17:45 -0400
Subject: thread stomp?
In-Reply-To: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
References: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
Message-ID: <20080512161745.186618bf.darcy@druid.net>

On Mon, 12 May 2008 20:00:52 GMT
pyn3wb <pyn3wb at pyn3wb.com> wrote:
> class1 (threading.Thread):
                           ^
SyntaxError: invalid syntax

Give us a script that works.  Ideally it should output something that
indicates what the error is.

> 		//run over files

This is not a comment in Python.

> class2 threads seems to start prior to class1 threads done; class2 
> results depend on class1 finish first

What are you trying to do?  If all you care about is making one thread
depend on another finishing, why make two threads?  Just have one
thread do one thing and then do the other.

Not every problem is a threading problem.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From lists at cheimes.de  Tue May 13 06:37:38 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 13 May 2008 12:37:38 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <g0br1i$2n9$1@ger.gmane.org>

wxPythoner at gmail.com schrieb:
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.

You are confusing immutable objects with singletons. Never use "is" with
strings and numbers.

Christian



From dullrich at sprynet.com  Fri May 30 10:50:16 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:50:16 -0500
Subject: Getting up and running with Python on a Mac
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <dullrich-7A14DA.09501630052008@text.giganews.com>

In article 
<7d593f8a-92b8-4dfe-935f-dd6a22c70faf at m45g2000hsb.googlegroups.com>,
 tkpmep at hotmail.com wrote:

> I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
> 10.5.3), and am looking to install Python on it, and to use it with
> XCode, Apple's IDE. 

If that's what you really want to do then start XCode, select
New Project and look for the ones with "Python" in their names.

I was excited to hear that Python was going to be automatically
integrated into XCode in OS 10.5. I tried it once. I should say
I really didn't give it a fair trial - the impression I got from
my unfair trial was I'd have to learn a lot about Cocoa to do
anything useful. 

Searched a little, decided to try wxPython next, and I was
very happy with that. Seems much easier - also as far as I
could see there was nothing but a 'Hello World' example
included in XCode, while wxPython comes with a truly amazing
suite of complete examples (the C++ wxWidgets book recommends
looking at wxPython for the examples!)

>Some googling suggests that a number of people
> have had trouble getting Python to run satisfactorily on their Macs.
> This is my first Mac, and I'd appreciate some guidance on what to do
> (and what not to) when installing Python and potential problems to
> keep an eye open for. I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant  - I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.
> 
> Thank you in advance
> 
> Thomas Philips

-- 
David C. Ullrich


From arnodel at googlemail.com  Wed May 14 15:20:44 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 20:20:44 +0100
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
	<g0fcgs$g59$3@registered.motzarella.org>
Message-ID: <m2skwkae0j.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Arnaud Delobelle wrote:
>
>> The standard Python way is using enumerate()
>>
>> for i, line in enumerate(fp):
>>     print "line number: " + lineno + ": " + line.rstrip()
>>
>
> I guess you meant to say :
>
>  for lineno, line in enumerate(fp):
>      print "line number: " + lineno + ": " + line.rstrip()

Yes!

-- 
Arnaud


From tjreedy at udel.edu  Mon May 19 09:06:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 09:06:50 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com><m2ve1b7msb.fsf@googlemail.com><mailman.1328.1211170968.12834.python-list@python.org>
	<6062786d-6f83-4850-bf55-4db4ec27bdea@b1g2000hsg.googlegroups.com>
Message-ID: <g0ru19$tcc$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:6062786d-6f83-4850-bf55-4db4ec27bdea at b1g2000hsg.googlegroups.com...
| On May 19, 5:22 am, "Terry Reedy" <tjre... at udel.edu> wrote:
| > "Arnaud Delobelle" <arno... at googlemail.com> wrote in message
| [...]
| > | Note that the same thing can be said about generator expressions,
| > | which are nothing more than anonymous, non-reusable, generator
| > | functions.
| >
| > Right.  So if someone posted on genexp confusion, I would suggest
| > 'write a full generator function'.
|
| I was just arguing against arguing for the removal of lambda on the
| basis that it doesn't add any functionality to the language!

I sort of understood that ;-)
Like Guido, I am split on keep/remove.
However, I have decided to leave lambda out of my Python-subset 
executable-pseudocode algorithm language.  I have not decided whether or 
not to include genexps.

| > | Instead these were _added_ to the language!
| >
| > As a convenience.
| > Actually, if one uses more that one for-clause in a generator 
expression,
| > there is a potential gotcha in relation to name capture.  So if that 
bites,
| > the genexp is not so much a convenience, and one might better write
| > the full function.

| Yes, IMHO this is a bug, and I wish I had the time to dive into the
| code to see if I can fix it.

If I do include them, I might restrict them to one for-clause because of 
that glitch, whose details I keep forgetting.

tjr
| 





From dullrich at sprynet.com  Wed May 14 16:47:18 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 15:47:18 -0500
Subject: sys.excepthack...
Message-ID: <dullrich-866845.15471814052008@text.giganews.com>

Becoming a fan of wxPython, but I can't stand
what it does with error messsages (I can't find
a way to dismiss that window with the error message
from the keyboard. Seems to be anti-modal - the
key strokes that normally kill the active window
kill the main window (sitting behind the window
with the error message) instead. If the window
only had an OK button...)

So I want to pop up a modal dialog on error.

Tried setting sys.stderr to an object with a
write method that pops up a dialog. The problem
with that is write() gets called several times
per exception - I don't see how to get my new
sys.stderr object to figure out when it's time
to show the message.

So then I found sys.excepthook. The problem with
that was that I was too stoopid to figure out how
to get a readable error message from the parameters
passed to excepthook.

Came up with a ridiculous hack involving both sys.stderr
and sys.excepthook. Works exactly the way I want.
Seems ridiculous - what's the right way to do this?

Ridiculous_hack.py:

import sys
import wx

def hook(*args):
  try:
    sys.__excepthook__(*args)
  finally:
    printer.Show()

class ErrorDisplay:
  def __init__(self):
    self.buffer = ''
  def write(self, text):
    self.buffer = self.buffer + text

  def Show(self): 
      wx.MessageDialog(None, str(self.buffer), 
                      'Error:',wx.OK).ShowModal()
      self.buffer = ''

printer = ErrorDisplay()
sys.stderr = printer
sys.excepthook = hook

-- 
David C. Ullrich


From gagsl-py2 at yahoo.com.ar  Mon May 26 19:25:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 20:25:56 -0300
Subject: Cannot Read MySQLdb docs within Python interpreter
References: <a5c7717d-22aa-40bc-981d-76766eb43d32@u12g2000prd.googlegroups.com>
Message-ID: <op.ubsbdidfx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 11:09:27 -0300, Con <conradwt at gmail.com> escribi?:

> Hi, I'm gettting a traceback when I attempt to read the MySQLdb docs
> after installation on Mac OS X 10.5.2:

Better to report it at bugs.python.org

-- 
Gabriel Genellina



From alokkat at gmail.com  Wed May 28 00:22:59 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 00:22:59 -0400
Subject: multi dimensional dictionary
Message-ID: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>

Dear All,

I am using dictionary for filling my xpath parsed data.

I wanted to use in the following manner.

mydict[index] ["key1"] ["key2"]    #Can someone help me with right
declaration.

So that I can fill my XML xpath parsed data

mydict[0] ["person"] ["setTime"] = "12:09:30"
mydict[0] ["person"] ["clrTime"] = "22:09:30"

Can someone help me with right declaration usages. Your help will be highly
appreciated.

Regards
Alok
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From sjmachin at lexicon.net  Sat May 17 05:12:40 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 17 May 2008 09:12:40 GMT
Subject: Getting elements and text with lxml
In-Reply-To: <6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<mailman.1265.1210987210.12834.python-list@python.org>
	<6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>
Message-ID: <482ea185$1@news.mel.dft.com.au>

J. Pablo Fern?ndez wrote:
> On May 17, 2:19 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pup... at pupeno.com>  
>> escribi?:
>>
>>
>>
>>> Hello,
>>> I have an XML file that starts with:
>>> <vortaro>
>>> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
>>> <kap>
>>>   <ofc>*</ofc>-<rad>a</rad>
>>> </kap>
>>> out of it, I'd like to extract something like (I'm just showing one
>>> structure, any structure as long as all data is there is fine):
>>> [("ofc", "*"), "-", ("rad", "a")]
>>> How can I do it? I managed to get the content of boths tags and the
>>> text up to the first tag ("\n   "), but not the - (and in other XML
>>> files, there's more text outside the elements).
>> Look for the "tail" attribute.
> 
> That gives me the last part, but not the one in the middle:
> 
> In : etree.tounicode(e)
> Out: u'<kap>\n  <ofc>*</ofc>-<rad>a</rad>\n</kap>\n'
> 
> In : e.text
> Out: '\n  '
> 
> In : e.tail
> Out: '\n'
>

You need the text content of your initial element's children, which 
needs that of their children, and so on.

See http://effbot.org/zone/element-bits-and-pieces.htm

HTH,
John




From benjamin.kaplan at case.edu  Thu May 29 09:47:10 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 29 May 2008 09:47:10 -0400
Subject: Tuple of coordinates
In-Reply-To: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <ec96e1390805290647k54149a35i631c5504be2dfb73@mail.gmail.com>

On Thu, May 29, 2008 at 8:16 AM, victor.herasme at gmail.com <
victor.herasme at gmail.com> wrote:

> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>     for j in (beg, end, step):
>          for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>
>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>

The pseudo-code and the intended result are two completely different things.
The pseudo-code would give you [(i1,j1,k1),(i1,j1,k2),(i1,j2,k1)...]. That
code would be written

coords = list()
for i in xrange(beg, end, step) :
   for j in xrange(beg, end, step) :
      for k in xrange(beg, end, step) :
         coords.append((i,j,k))

for the result you gave, you would do

i = xrange(beg, end, step)
j = xrange(beg, end, step)
k = xrange(beg, end, step)
coords = zip(i,j,k)


>
> Victor
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From BrianVanderburg2 at aim.com  Tue May 13 01:50:18 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Tue, 13 May 2008 01:50:18 -0400
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <48292C1A.5030200@aim.com>

John Salerno wrote:
> Just something that crosses my mind every time I delve into "Learning 
> Python" each night. Does anyone see any value in learning Python when you 
> don't need to for school, work, or any other reason? I mean, sure, there's 
> value in learning anything at any time, but for something like a programming 
> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off, but for the most part I'm 
> wondering what people's thoughts are as far as simply learning it for the 
> sake of learning. Does it seem like a silly endeavor to most people? Did 
> anyone here learn a programming language when you didn't need to? If so, how 
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense! 
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
I think almost anyone especially if frequently uses computer could 
benefit from learning a scripting language.  I'm mainly a C and C++ 
person and most of my programs use it.  But when I want to do a simple 
one-time task or something that will change frequently I'll use a 
scripting language to quickly get it done, such as extracting 
information from a web page or whatever.  With C, C++, and Python I do 
just about whatever I want/need, and they can be combined/embedded as 
well.  In general I think that learning some basics of programming can 
help develop pretty good logic/analytic skills as well, but that's just 
my opinion.  Maybe it's the other way around and logic/analytic skills 
lead to easily learning programing languages.  As for learning for the 
sake of it, if it's fun I don't see how it could hurt any.

Brian Vanderburg II


From tdahsu at gmail.com  Wed May 21 10:23:27 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Wed, 21 May 2008 07:23:27 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
Message-ID: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>

All,

I'd appreciate any help.  I've got a list of files in a directory, and
I'd like to iterate through that list and process each one.  Rather
than do that serially, I was thinking I should start five threads and
process five files at a time.

Is this a good idea?  I picked the number five at random... I was
thinking that I might check the number of processors and start a
multiple of that, but then I remembered KISS and it seemed that that
was too complicated.

If it's not a horrible idea, would anyone be able to provide some
quick code as to how to do that?  Any and all help would be greatly
appreciated!

Thanks in advance!


From johnjsal at NOSPAMgmail.com  Mon May 19 23:42:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:42:14 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
Message-ID: <20080519234214.beae9314.johnjsal@NOSPAMgmail.com>

On Mon, 19 May 2008 20:34:22 -0700 (PDT)
notnorwegian at yahoo.se wrote:

> i am confused.
> 
> x=5
> y=5
> 
> x==y -> True
> x is y -> True
> 
> shouldnt x is y return False since they shouldnt(dont?) point to the
> same place in memory, they just store an equal value?
> 

For some immutable values (such as numbers and strings), Python will have separate variables reference the same object, as an optimization. This doesn't affect anything, since the numbers are immutable anyway and a shared reference won't create any unexpected changes.

It also works with small, but not large, strings:

>>> x = 'hello'
>>> y = 'hello'
>>> x == y
True
>>> x is y
True
>>> a = 'this is longer'
>>> b = 'this is longer'
>>> a == b
True
>>> a is b
False
>>> 

In the above example, Python has created only one string called 'hello' and both x and y reference it. However, 'this is longer' is two completely different objects.


From efurman at admailinc.com  Wed May 14 12:51:40 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 14 May 2008 08:51:40 -0800
Subject: cgitb performance issue
In-Reply-To: <op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <481F585A.5080707@admailinc.com>
	<op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <482B189C.1050302@admailinc.com>


Gabriel Genellina wrote:

>En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman <efurman at admailinc.com> escribi?:
>
>  
>
>>I tried adding a form to our website for uploading large files.
>>Personally, I dislike the forms that tell you you did something wrong
>>and make you re-enter *all* your data again, so this one cycles and
>>remembers your answers, and only prompts for the file once the rest of
>>the entered data is good.  However, the first time the form loads it can
>>take up to 30 seconds... any ideas why?
>>    
>>
>
>Hard to tell without looking at the code... And what has cgitb to do with this?
>  
>
Hmmmm... excellent question, and the answer is -- Nothing.  My 
apologies.  I'm importing cgi (cgitb was while I was debugging it), as 
well as a bunch of others.

Here's the source, with a bunch of the actual html stripped out.  The -u 
as well as the last two lines were an attempt to eliminate the 30-second 
pause while it loads, as it seems to get all data transferred, then just 
waits for a while.  Any ideas appreciated.  My apologies for the ugly code.
-- 
Ethan

<code>
#!/usr/local/bin/python -u

import cgi
#import cgitb; cgitb.enable()
import smtplib
import mimetypes
import os
import sys
from email.Encoders import encode_base64
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart

HEADER = """Content-type: text/html\n
   <snip>
   """
SELECTFILES = """
   <snip>
"""
FILESRECEIVED = """
   <snip>
"""
VERIFIED = """
   <snip>
"""
FOOTER = """
   <snip>
   </body>
</html>"""

REQUIRED = '<br><i>*required</i>'
form = cgi.FieldStorage()

clientname = clientemail = clientcsr = subject = body = ""
csrs = {"frank":{'html':'selected="yes"', 'name':'<name removed>', 
'email':'<email removed>'}, \
       "kathy":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "chris":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "tracy":{'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "susi": {'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}, \
       "bill": {'html':'', 'name':'<name removed>', 'email':'<email 
removed>'}}
incomplete = False
files = []
filelist = []


if form:
   if form.has_key("name"):
       clientname = form["name"].value
   if form.has_key("email"):
       clientemail = form["email"].value
   if form.has_key("CSR"):
       clientcsr = form["CSR"].value
       csrs["frank"]['html'] = ''                              # clear 
default
       csrs[clientcsr]['html'] = 'selected="yes"'
   if form.has_key("subject"):
       subject = form["subject"].value
   if form.has_key("body"):
       body = form["body"].value
   incomplete = not (clientname and clientemail and clientcsr and subject)
     if form.has_key("file1"):
       file1 = form["file1"]
       if file1.filename:
           files.append(file1.filename + "<br>")
           filelist.append(file1)
   if form.has_key("file2"):
       file2 = form["file2"]
       if file2.filename:
           files.append(file2.filename + "<br>")
           filelist.append(file2)
   if form.has_key("file3"):
       file3 = form["file3"]
       if file3.filename:
           files.append(file3.filename + "<br>")
           filelist.append(file3)
   if form.has_key("file4"):
       file4 = form["file4"]
       if file4.filename:
           files.append(file4.filename + "<br>")
           filelist.append(file4)
   if form.has_key("file5"):
       file5 = form["file5"]
       if file5.filename:
           files.append(file5.filename + "<br>")
           filelist.append(file5)
      def csrform():
   cn_present = ''
   ce_present = ''
   sb_present = ''

   if incomplete:
       if not clientname:
           cn_present = REQUIRED
       if not clientemail:
           ce_present = REQUIRED
       if not subject:
           sb_present = REQUIRED
             print """
      <html snipped>
                       <form action="/cgi-bin/contact_files.py" 
method="POST" enctype="multipart/form-data">
                       <p>
                       Please fill in your name, e-mail address, 
subject, and select your CSR.  You will then be able to upload files
                       on the next screen.  Any additional notes may go 
in the Message field.
                       <br /></p>
                       <table border="0">
         """
   print """
                       <tr><td>Your name</td><td><input type="text" 
size="40" maxlength="50" name="name" value="%s">%s</td></tr>""" \
                               % (clientname, cn_present)
   print """
                       <tr><td>Your e-mail</td><td><input type="text" 
size="40" maxlength="100" name="email" value="%s">%s</td></tr>""" \
                               % (clientemail, ce_present)
   print """
                       <tr><td>Subject line</td><td><input type="text" 
size="40" maxlength="100" name="subject" value="%s">%s</td></tr>""" \
                               % (subject, sb_present)
   print """
                       <tr><td>Your CSR</td><td><select name="CSR">
                       <option %s value="frank">Frank</option>
                       <option %s value="kathy">Kathy</option>
                       <option %s value="chris">Chris</option>
                       <option %s value="tracy">Tracy</option>
                       <option %s value="susi">Susi</option>
                       <option %s value="bill">Bill</option>
                       </select></td></tr>""" \
                               % (csrs["frank"]['html'], 
csrs["kathy"]['html'], csrs["chris"]['html'], csrs["tracy"]['html'], 
csrs["susi"]['html'], csrs["bill"]['html'])
   print """
       <html snipped>""" % (body)
  def uploadform():
   try:
       msg = MIMEMultipart()
       msg['To'] = "%s <%s>" % (csrs[clientcsr]['name'], 
csrs[clientcsr]['email'])
       msg['From'] =  "Ad-Mail Upload Manager for %s 
<www at admailinc.com>" % (clientname, )
       msg['Reply-to'] = clientemail
       msg['Subject'] = subject
       msg.attach(MIMEText(body))
       for file in filelist:
           attachment = MIMEBase('application', 'octet-stream')
           attachment.set_payload(file.file.read())
           encode_base64(attachment)
           attachment.add_header('Content-Disposition', 'attachment', 
filename=os.path.split(file.filename)[1])
           msg.attach(attachment)
       smtp = smtplib.SMTP()
       smtp.connect()
       smtp.sendmail('Ad-Mail Upload Manager <www at admailinc.com>', 
csrs[clientcsr]['email'], msg.as_string())
       smtp.close
   except:
       print "<H1>Unknown error.  Please try again later.</H1>"
       smtp = smtp
if not (form and clientname and clientemail and clientcsr):
   print HEADER
   csrform()
   print FOOTER

elif files:
   print HEADER
   print FILESRECEIVED % (' '.join(files), csrs[clientcsr]['name'])
   uploadform()
   print FOOTER
    else:
   print HEADER
   print SELECTFILES % (clientname, clientemail, subject, clientcsr, 
body, clientname.split()[0], csrs[clientcsr]['name'].split()[0])
   print FOOTER

sys.stdout.flush()
sys.stdout.close()
</code>
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From google at mrabarnett.plus.com  Thu May 15 18:18:57 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 15 May 2008 15:18:57 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
Message-ID: <a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>

On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> you're right, my java implementation does indeed parse for Id3v2
> (sorry for the confusion).  i'm using the getrawid3v2() method of this
> bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> i buffer and parse.  apologies if i misrepresented my code!
>
> back to python, i wonder if i'm misusing the mutagen id3 module.  this
> brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> Mutagen/Tutorial) leads me to believe that something like this might
> work:
>
> from mutagen.mp3 import MP3
> id3tags = MP3(urllib2.urlopen(URL))
>
> but this gives me the following TypeError: "coercing to Unicode: need
> string or buffer, instance found".  does this mean i need to convert
> the "file-like object" that is returned by urlopen() into a unicode
> object?  if so, do i just decode() with 'utf-8', or is this more
> complex?  as of now, doing so gives me mostly "No such file or
> directory" errors, with a few HTTP 404s.
>
[snip]
I think it's expecting the path of the MP3 but you're giving it the
contents.


From gagsl-py2 at yahoo.com.ar  Sun May 18 00:45:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 01:45:57 -0300
Subject: Shelve or pickle module
References: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>
Message-ID: <op.ubb16vfbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 00:14:19 -0300, Guillaume Bog <guibog at gmail.com> escribi?:

> I read and re-read "Python in a Nutshell" written by Alex Martelli,
> who knows what he is talking about. I'm a bit new to python and I'm
> going to start doing persistence side on a project. Martelli's book
> seems to tell me that I should use shelve module, but any code I
> browsed is using pickle instead. Is there any reason to prefer pickle
> over shelve?

A shelve is just a persistent dictionary that uses pickle to store the objects.
If you want to store one or a few objects, using pickle directly may be easier.
Any problem you may have with pickle (nonpickleable objects, security risks) will happen with shelve too.

-- 
Gabriel Genellina



From skunkwerk at gmail.com  Mon May  5 12:02:12 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 5 May 2008 09:02:12 -0700 (PDT)
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
Message-ID: <65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>

On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
>
>
> > i'm redirecting the stdout & stderr of my python program to a log.
> > Tests i've done on a simple program with print statements, etc. work
> > fine.  however, in my actual program i get weird output like this:
>
> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> > if any
> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
> > from queue, if any
> > 2008-05-04 20:20:44,790 DEBUG
> > DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any
>
> > class write2Log:
> >    def write(self, x):
> >            if x!='\n':
> >                    logger.debug(str(x))
>
> > any ideas what might be causing the problems?  some of the messages
> > being output are quite long - might this be a problem?
>
> Try this simplified example and see by yourself:
>
> import sys
>
> class Write2Log:
>      def write(self, x):
>          sys.__stdout__.write('[%s]' % x)
>
> sys.stdout = Write2Log()
>
> print "Hello world!"
> age = 27
> name = "John"
> print "My name is", name, "and I am", age, "years old."
>
> --
> Gabriel Genellina

thanks Gabriel,
   i tried the code you sent and got output like the following:
[My name is][][john][][and I am][][27][][years old.]

it doesn't really help me though.  does this have any advantages over
the syntax i was using?
are there any limits on what kind of objects the logger can write?  ie
ascii strings of any length?

thanks


From deets at nospam.web.de  Tue May 20 09:34:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:34:16 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <69g2bpF31ttuuU1@mid.uni-berlin.de>

John Salerno wrote:

> I posted this code last night in response to another thread, and after I
> posted it I got to wondering if I had misused the list comprehension.
> Here's the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and
> it's being used as everyone expects it to be used. In example 2, however,
> I began to think this might be an abuse of list comprehensions, because
> I'm not assigning the result to anything (nor am I even using the result
> in any way).
> What does everyone think about this? Should list comprehensions be used
> this way, or should they only be used to actually create a new list that
> will then be assigned to a variable/returned/etc.?

the above code is pretty much of a no-no because it has quadratic runtime
behavior.

That being said, I use that idiom myself.  But I don't see anything wrong
with using a list-comp as loop-abbreviation. because that is it's actual
purpose. And also it is common in non-functional languages that l-values
aren't always assigned, if the aren't needed. It's the consequence of
having side-effects in a language - and python has them.

Diez




From danb_83 at yahoo.com  Wed May 21 00:55:14 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 20 May 2008 21:55:14 -0700 (PDT)
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <30577157-d93c-4e7c-90bb-f9d8dfee56d7@8g2000hse.googlegroups.com>

On May 20, 5:59?pm, Robert Kern <robert.k... at gmail.com> wrote:
> Ethan Furman wrote:
> > Greetings,
>
> > I'm looking at the struct module for binary packing of ints and floats. ?
> > The documentation refers to C datatypes. ?It's been many years since I
> > looked at C, but I seem to remember that the data type sizes were not
> > fixed -- for example, an int might be two byes on one machine, and four
> > bytes on the next. ?Can any C programmers verify this? ?If it is true,
> > does that mean that struct.pack('h', 8001) might give me different
> > results depending on the machine it's running on?
>
> Right. I believe (but could be wrong) that "char" is defined to be one byte, but
> that "short", "int", "long", and "long long" are defined as "at least as big as
> the previous type".

There are also minimum sizes for each type:

char: 8 bits
short: 16 bits
int: 16 bits
long: 32 bits
long long: 64 bits

> In practice, though, on nearly every machine that Python runs on, "char" is one
> byte, "short" is two bytes, and "int" is four bytes. "longs" and "long longs"
> tend to vary substantially, though; never assume sizes for them.
>
> Single-precision floats are always four bytes and double-precision floats are
> always eight bytes. "long doubles" vary; they could be twelve bytes or sixteen.
>
> If you want to deal with fixed sizes, use struct.calcsize() to test the sizes of
> each of the integer types, assign them to width-specific aliases, and always use
> these aliases.

Also, according to the documentation for the struct module, the =, <,
and > format characters specify "std. size" rather than "native size".


From notnorwegian at yahoo.se  Tue May 20 14:34:15 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Tue, 20 May 2008 11:34:15 -0700 (PDT)
Subject: iterate start at second row in file not first
Message-ID: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>

i have a big file with sentences, the first file of each sentence
contains a colon(:) somewher eon that line
i want to jump past that sentence.

if all(x != ':' for x in line):

this way i  can check but i dont want to check for every line in the
whole file, quite unnecessary when i only need to
chekc the first line.


so the question is, when dealign with iterators like:
mov = open(afile)
for line in mov:
	do y

how do i jump the first step there? i dont want to iterate the first
row...how do i start at the second?




From woodygar at sky.com  Wed May 21 12:42:51 2008
From: woodygar at sky.com (garywood)
Date: Wed, 21 May 2008 17:42:51 +0100
Subject: can someone with guessing a number 
Message-ID: <005101c8bb61$b78fb710$1300a8c0@Home>

I would just like the program to exit after guessing the amount of numbers wrong 

# Guess My Number
import random  
the_number = random.randrange(100) + 1
tries = 1
# guessing loop
while (guess != the_number):
    if (guess > the_number):
        print "Lower..."
    else:
        print "Higher..."

    guess = int(raw_input("Take a guess: "))       
    tries += 1
    if tries > 10:
        print 'you failed- give up'

print "You guessed it!  The number was", the_number
print "And it only took you", tries, "tries!\n"
  
raw_input("\n\nPress the enter key to exit.")

many Thanks 
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From dullrich at sprynet.com  Sat May 24 07:23:48 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:23:48 -0500
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<C3q*E9Bds@news.chiark.greenend.org.uk>
Message-ID: <2auf34dc59ajcjfq7f3fl0366eukfd98d5@4ax.com>

On 23 May 2008 18:23:04 +0100 (BST), Matthew Woodcraft
<mattheww at chiark.greenend.org.uk> wrote:

>John Salerno  <johnjsal at gmailNOSPAM.com> wrote:
>> Basically, the question is this: can you write the logic behind a 
>> program (whether it be a game, an email client, a text editor, etc.) 
>> without having any idea of how you will implement the GUI?
>
>You probably could, but it's best not to unless you're somehow forced
>to.
>
>In practice, the interface that you want your 'logic' layer to provide
>to the GUI is likely to depend on some of the details of how the GUI
>works.
>
>If you did the lower levels first without having any idea at all of
>what you were going to do with the GUI, it's quite likely that you'd
>find you'd written a few functions which turned out not to be needed at
>all, or that some functionality that the GUI needs to use very
>frequently is rather slow to execute, or that some functionality that
>you thought belonged to the 'logic' is really better done in the GUI
>layer, and so on and so forth.
>
>For example, if you were writing the 'logic' for a chess program you
>might choose a way of modelling the board that can't represent a
>position with more than one black king. And then when you got round to
>doing the GUI you might find out that your users would like to be able
>to have this temporarily when setting up a position.

What you say may be true, but this doesn't seem to me like a good
example. Not that I see _why_ the player would want to have
two kings temporarily, but if so I wouldn't have the view report
this state to the model, I'd have the view wait until the player had
decided on the final configuration betore saying anything to the
model. The model should only deal with legal positions.

(Could be that it's not until we start actually playing the game 
through the GUI that we find the model can't deal with two 
black queens. But that's not an example either, that would just 
mean the model is wrong, not allowing every legal position.)

>-M-

David C. Ullrich


From pauljefferson at gmail.com  Sat May  3 19:02:29 2008
From: pauljefferson at gmail.com (Paul Jefferson)
Date: Sun, 4 May 2008 00:02:29 +0100
Subject: Encoding Text
Message-ID: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>

Hi,
I'm learning this and I'm making a program which takes RSS feeds and
processes them and then outputs them to a HTML file.
The problem I have is that some of the RSS feeds contain chachters which I
think are outside of the ascii range as when I attempt to write the file
containing themI get the follwoign error:
File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 201, in
<module>
    runner(1,"save.ahc")
  File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 185, in
runner
    h.write(html[countera])
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in
position 1147: ordinal not in range(128)
For the life of me I can't figure out what I should do to stop this - I
tried to change the html by doing a html[countera] = unicode(html[countera])
but it didn't seem to chaneg anything.
Any help would be greatly appreciated,
Thanks
Paul

>
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From gagsl-py2 at yahoo.com.ar  Sun May 25 20:16:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 21:16:39 -0300
Subject: Storing a function
References: <fe46746a0805251400g47c08a74gd63625330a8e547f@mail.gmail.com>
Message-ID: <op.ubqi11akx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 18:00:12 -0300, Kuros <kurosknight at gmail.com> escribi?:

> Hi,
> Hoping I could get some help with a python question.
>
> I want to be able to store the code for a single function in a .py file,
> such as:
>
> def test():
>     print "Test"
>
> From within a Python script, I would like to be able to get a handler so I
> can do something like:
>
> handler.test()

The "handler" is called a "module" and is created from the .py file by using import...

> I want to be able to store the handlers in a blob in a SQLite DB.

So store the .py file...

> Essentially, I want to store a compiled version of a function. I have tried
> using compile() and exec, and while it sort of works, it seems to import the
> code into the global namespace. I can do:
>
> x = compile(file.read(), "<x>", 'exec')
> exec x
> test()
>
> and it calls test, but I may have several functions with the same name, all
> read from different files. So I need to be able to do handler.test().

If you don't want to store the .py, store the compiled module .pyc
If you still want to create and manage your own fake version of modules, use an explicit namespace:

ns = {}
compiled = compile(...)
exec compiled in ns
test = ns['test']
test()

-- 
Gabriel Genellina



From pball.benetech at gmail.com  Sun May 25 23:40:16 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 20:40:16 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com>
Message-ID: <3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com>

On May 25, 7:46?pm, miller.pau... at gmail.com wrote:
> > I think this problem is related to integer partitioning, but it's not
<snip>
>
> If, by "integer partitioning," you mean the "subset sum
> problem" (given a finite set S of integers, does S contain a subset
> which sums up to some given integer k?), then you are right. ?I'm
> reasonably sure there's a polynomial reduction from your problem to
> the subset sum problem. ?That would make your problem NP-complete.

Wow, that's helpful. http://en.wikipedia.org/wiki/Subset_sum clarifies
what I'm trying to do. Yes, it probably is NP-complete. Fortunately my
use case doesn't require that the process finish, just that it produce
a lot. I can exclude trivial cases (e.g., f' = f(S) + s_1 - s_1) with
some sort of simplifier.

> Like I said, because this looks related to the subset sum problem
> (though harder, because you're asking for "all" such functions, for
> some rigorous definition of "all," as per the previous sentence), I
> suspect it's NP-complete. ?However, there are probably some good
> heuristics, such as if s1 has a large intersection with s0, it's
> probably a good idea to use s1 in whatever formula you come up with.

There are a few real-world constraints which make the problem easier,
but only by linear factors, I suspect. More on this below.


> Other than that, I don't really have an idea. ?Can you say what the
> application of this algorithm would be? ?Knowing the use case might
> suggest a better approach.

This is a problem in statistical estimation. Given n records made up
of k variables, define a cell as the point in the cartesian product of
v_1 * v_2 * ... * v_k. I want to apply an estimator on the data in
each cell.

However, many cells are empty, and others are too sparse to support
estimation. One solution is to build lots of valid aggregations,
called "strata," for which estimates can be made for chunks of cells.
A "valid aggregation" is a sequence of *adjacent* cells (see below)
whose data are pooled (by whatever mechanism is relevant to the
estimator).

The cells are "elements" in my initial problem statement, and the
strata are the sets.

The constraints I mentioned are on the composition of strata: strata
can only contain sequences of adjacent cells, where adjacency is
defined for each variable. Two cells are adjacent if they are equal on
every variable except one, and on that one and by its definition, they
are adjacent.

Does this make it easier to understand, or more difficult? thanks --
PB.



From gabe at dragffy.com  Thu May 15 06:51:27 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:51:27 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<905611fd-e5c4-478f-a0bd-417ccc5fe0a1@d77g2000hsb.googlegroups.com>
Message-ID: <loom.20080515T105059-609@post.gmane.org>

 <bockman <at> virgilio.it> writes:

> >>> tasks = [ [] for x in xrange(6) ]
> >>> tasks[0].append(1)
> >>> tasks
> [[1], [], [], [], [], []]
> >>>
> 

Thanks, Bockman




From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 30 18:58:09 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 30 May 2008 18:58:09 -0400
Subject: accumulator generators
In-Reply-To: <11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<6ab4u7F35bmisU1@mid.uni-berlin.de>
	<11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>
Message-ID: <xD%%j.155$tT4.67@bignews4.bellsouth.net>

Cameron wrote:
> On May 30, 1:04 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Cameron schrieb:
>>
>>
>>
>>> I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
>>> Graham article</a> and he builds an accumuator generator function in
>>> the appendix. His looks like this:
>>> <pre>
>>> def foo(n):
>>>   s = [n]
>>>   def bar(i):
>>>     s[0] += i
>>>     return s[0]
>>>   return bar
>>> </pre>
>>> Why does that work, but not this:
>>> <pre>
>>> def foo(n):
>>>   s = n
>>>   def bar(i):
>>>     s += i
>>>     return s
>>>   return bar
>>> </pre>
>> Because python's static analysis infers s as being a variable local to
>> bar in the second case - so you can't modify it in the outer scope.
>>
>> In the future, you may declare
>>
>> def bar(i):
>>      nonlocal s
>>      ...
>>
>> Diez
> 
> thanks for the response. Just to make sure I understand- Is the reason
> it works in the first case because s[0] is undefined at that point (in
> bar), and so python looks in the outer scope and finds it there?

You can refer to variables in enclosing scopes, just not redefine them in that 
same scope.  That's why in the first example, bar can refer to to s (defined in 
foo).  By assigning to s[0], it modifies the list, which is OK; trying to 
redefine the name 's' (like the second example tries to do) would not be OK.

Also see: http://zephyrfalcon.org/labs/python_pitfalls.html (pitfall #6).

-- 
Hans Nowak (zephyrfalcon at gmail dot com)
http://4.flowsnake.org/


From zerty.david at gmail.com  Mon May  5 18:43:24 2008
From: zerty.david at gmail.com (David Anderson)
Date: Mon, 5 May 2008 19:43:24 -0300
Subject: How to generate binary python?
Message-ID: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com>

Hi, i'm comingo from Java and I'm wanting to know what in Python is the
equivalent to the file.class in java, I am producing some apps that ar not
open source, so I would like to share only the binaries, Both for Windows
and for Linux, Can you suggest me anything?
Bye
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From duncan.booth at invalid.invalid  Sun May 11 07:57:48 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 11:57:48 GMT
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <Xns9A9B83DE83757duncanbooth@127.0.0.1>

wxPythoner at gmail.com wrote:

> There's a thing that bugs me in Python. Look at this...
> 
>>>> print "Testing\"
> SyntaxError: EOL while scanning single-quoted string
> 
> 
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?
> 
Of course it is, but that isn't what is meant here.

Python supports single-quoted strings which are delimited by either a 
single quote or a double quote mark. It also supports triple-quoted strings 
which are delimited either by three single quotes or three double quotes.

The overloaded meaning of 'single' is perhaps unfortunate.


From notnorwegian at yahoo.se  Mon May 26 16:52:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 13:52:35 -0700 (PDT)
Subject: python raycaster, pycaster, where?
Message-ID: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>

i tried googling this thing but couldnt find it. i cant find it in
pyagme either.

anyone know?


From Lie.1296 at gmail.com  Thu May 15 11:48:06 2008
From: Lie.1296 at gmail.com (Lie)
Date: Thu, 15 May 2008 08:48:06 -0700 (PDT)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <9928a35e-9fa7-4df2-9b5c-ad078ecac566@y18g2000pre.googlegroups.com>

On May 15, 5:08?pm, Gabriel <g... at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
> >>> tasks = [[]]*6
> >>> tasks
>
> [[], [], [], [], [], []]>>> tasks[0].append(1)
> >>> tasks
>
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
> I got this example from page 38 of Beginning Python.
>
> Regards
>
> Gabriel

As a complementary note, if you want to copy a list (probably a filled
one instead of blank ones like here) and wanted to copy a list so that
the new copy is a completely separate instance from the old copy, you
may use deepcopy (from copy import deepcopy).


From mensanator at aol.com  Tue May 13 13:10:56 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 13 May 2008 10:10:56 -0700 (PDT)
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
Message-ID: <e1a545f4-03c7-44f7-a3b2-68786b6650ec@k13g2000hse.googlegroups.com>

On May 13, 11:59?am, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>
> > if i do something like
> > while 1:
> > ? ? print "x"
>
> > will the program ever stop because it runs out of memory?
>
> No, there is no reason to run out of memory. This will simply
> make an everlasting x-printer and there is no need to store
> anything (except output buffers, terminal scrollback, etc.,
> but all of this is temporary and of limited size). In case of
> adding elements to a list, the memory usage can, of course,
> grow unlimitedly. On linux, if the process eats up too much
> memory, it gets killed. I do not know about windows, but
> they would probably crash with a BSOD or something of that
> sort.

Usually, Windows just says "out of memory".


From artasis at gmail.com  Tue May  6 03:56:52 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Tue, 6 May 2008 00:56:52 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
	<3b460037-46ea-4944-9dc1-516666889da2@2g2000hsn.googlegroups.com>
Message-ID: <0bb87a79-4862-40e5-91cf-92c2f83d43ac@a1g2000hsb.googlegroups.com>

On May 5, 3:48 pm, Jeff <jeffo... at gmail.com> wrote:
> ctypes?

hm..may you explain it?


From skanemupp at yahoo.se  Fri May 16 08:41:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 05:41:15 -0700 (PDT)
Subject: free dictionary english - spanish?
Message-ID: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>

i want to write a translationprogram, i have the  webapp done already.

i need a big free dictionary though. english-spanish/spanish-english
seems like the best i know some spanish and thats what also is needed
the most i think together with chinese.

anywhere you can download one? preferrably easy to parse...


From lobais at gmail.com  Sat May  3 18:31:01 2008
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sun, 04 May 2008 00:31:01 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <fvilul$15ti$1@news.mtu.ru>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>  <fvilul$15ti$1@news.mtu.ru>
Message-ID: <1209853861.29405.1.camel@localhost.localdomain>


On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
> 
> > Arnaud Delobelle wrote:
> >> 
> >> sum() works for any sequence of objects with an __add__ method, not
> >> just floats!  Your algorithm is specific to floats.
> > 
> > This occurred to me also, but then I tried
> > 
> > sum(['abc', 'efg'], '')
> 
> Interesting, I always thought that sum is like shortcut of
> reduce(operator.add, ...), but I was mistaken.
> 
> reduce() is more forgiving:
> reduce(operator.add, ['abc', 'efg'], '' ) # it works
> 'abcefg'

Hm, it works for lists:
sum(([1], [2]), []) 
[1, 2]

However I find the seccond argument hack ugly.
Does the sum way have any performance advantages over the reduce way?

-- 
Best Regards,
Med Venlig Hilsen,
Thomas



From jcd at sdf.lonestar.org  Thu May  8 09:46:51 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 09:46:51 -0400
Subject: Parsing Email 'References' header.
In-Reply-To: <4822F7B6.2000403@gmail.com>
References: <4822F7B6.2000403@gmail.com>
Message-ID: <1210254412.8236.3.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 14:53 +0200, Aspersieman wrote:
> Hi
> 
> I have a python script that parses email headers to extract information 
> from them. I need to get the _last_ messageid in the 'References' field 
> (http://cr.yp.to/immhf/thread.html) to create a threaded view of these 
> emails (these messageid's are stored in a database).
> 
> Now, I can easily access the 'References' field using the python 'email' 
> module, but I need a regular expression to get the last messageid in the 
> 'References' field.
> 
> Here's what I have so far:
> <code>
> rx_lastmesgid = re.compile(r"(<.+>$)")
> lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) # 
> parentid's value is 
> eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
> lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
> </code>
> 
> I need it to return "<5 at mail.gmail.com>"
> 
> Can anyone help?
> 
> Thanks
> 
> Nicol
> 

Forget regular expressions.  

py>>> lastmesgid = '<' + parentid.split('<')[-1]




From bignose+hates-spam at benfinney.id.au  Sat May 24 21:42:48 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:42:48 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
	<mailman.1540.1211661268.12834.python-list@python.org>
Message-ID: <87ej7r9n1j.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Sat, 24 May 2008 17:51:23 +0200
> David <wizzardx at gmail.com> wrote:
> > If I did start doing some kind of TDD, it would be more of the
> > 'smoke test' variety. Call all of the functions with various
> > parameters, test some common scenarios, all the 'low hanging
> > fruit'. But don't spend a lot of time trying to test all possible
> > scenarios and corner cases, 100% coverage, etc, unless I have
> > enough time for it.
> 
> Penny wise, pound foolish. Spend the time now or spend the time
> later after your client complains.

Worse, if you don't spend the time now, you'll end up spending the
time later *plus* all the time to find the bug in the first place, all
the time to tease its behaviour out from all the interdependent code,
all the time to go through more rounds of QA, etc. With BDD, only the
time to code the test is spent, so you save all that other time.

-- 
 \           "Laugh and the world laughs with you; snore and you sleep |
  `\                                             alone."  -- Anonymous |
_o__)                                                                  |
Ben Finney


From dsc at ecs.soton.ac.uk  Thu May 29 06:57:47 2008
From: dsc at ecs.soton.ac.uk (Dave Challis)
Date: Thu, 29 May 2008 11:57:47 +0100
Subject: Any way to loop through object variables?
In-Reply-To: <7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
References: <483D7A47.3030606@ecs.soton.ac.uk>	<483D8614.7000808@islandtraining.com>
	<7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
Message-ID: <483E8C2B.4050700@ecs.soton.ac.uk>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ah thanks, vars(...) was exactly what I was after.  I'd come across
dir() before, but this returns more than I need.

Thanks again,
Dave

Saju Pillai wrote:
> 
> On 28-May-08, at 9:49 PM, Gary Herron wrote:
> 
>> Dave Challis wrote:
>>> Hi,
>>> Just wondering if there's a way to iterate through all variables which
>>> an object has set?
>>>
>>> Specifically, I'm using the OptionParser module, which returns an
>>> options object, containing all command line options as object variables.
>>> I'd like to iterate over these rather than getting at them by name.
>>>
>>> Cheers,
>>> Dave
>>
>> For this object (and many others), you can get at the attributes with
>> the vars(...) builtin.
>> It returns a dictionary of attribute names and values.
> 
> 
> Also dir(object) will get you the list of attributes of that object.
> 
> -srp
> 
>>
>>
>> Gary Herron
>>
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


- --
~~~~~~~~~~~~~~~~~o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                .
                <><                                           (
 )    Dave Challis             ><>                       )    )
_(__dsc at ecs.soton.ac.uk__________________________________(____(___________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFIPowrv26GZvAVVFERApQfAJ96bFa1wl1sbnDCNmbtf5/tpNqTaQCdHKwf
k8+Uv8yXn2Bh5ri6sf5qMmA=
=cnfO
-----END PGP SIGNATURE-----


From nevillednz at gmail.com  Fri May  2 18:51:16 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Fri, 2 May 2008 15:51:16 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>
Message-ID: <4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>

On May 2, 11:13 am, George Sakkis <george.sak... at gmail.com> wrote:
> [1]http://en.wikipedia.org/wiki/Context-free_language
> [2]http://en.wikipedia.org/wiki/Regular_language
> [3]http://wiki.python.org/moin/LanguageParsing

Thanx for the link to these parsers. ANTLR looks interesting.
Yoyo: http://www-users.cs.york.ac.uk/~fisher/software/yoyovwg/readme

I figured out a way to do it in python.

#!/usr/bin/env python2
# -*- coding: utf-8 -*-
import re
tests="""
  { a test  BAD
  { a test } OK
  { a test } { a test } OK
  { a test } { this { a test } is a test } OK
  { a test  { this { a test } is a test } missing close BAD
  a test } { this { a test } is a test } BAD
  { a test } this { a test } is a test } BAD
""".splitlines()[1:]

def referee(str):
  return bool(re.search("OK",test))

def check_open_close(str):
  try:
    eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
[^{}]+)", str) if c))
  except SyntaxError:
    return False
  else:
    return True

for test in tests:
  if check_open_close(test) == referee(test):
    print "DETECTED:",test
  else:
    print "MISSED:",test
[linux]$ ./matchall_open_close.py
DETECTED:   { a test  BAD
DETECTED:   { a test } OK
DETECTED:   { a test } { a test } OK
DETECTED:   { a test } { this { a test } is a test } OK
DETECTED:   { a test  { this { a test } is a test } missing close BAD
DETECTED:   a test } { this { a test } is a test } BAD
DETECTED:   { a test } this { a test } is a test } BAD

It's not exactly what I planned, but as a python one/two-liner it
works fine.
    eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
[^{}]+)", str) if c))

ThanX again
N




From ramu.chandrut at gmail.com  Sun May 11 00:23:06 2008
From: ramu.chandrut at gmail.com (ramu)
Date: Sat, 10 May 2008 21:23:06 -0700 (PDT)
Subject: hai dear
Message-ID: <9316f971-57e5-46e2-9d2f-3d522f6e5588@w8g2000prd.googlegroups.com>

hai friends,

"each day is a new adventure to dream search and discover"

www.goodhistory5.blogspot.com


From tdelaney at avaya.com  Sun May 11 20:05:11 2008
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 12 May 2008 08:05:11 +0800
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <d7837f5f-377e-4d9c-a696-963165648d5e@c58g2000hsc.googlegroups.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C959BF2@301081ANEX2.global.avaya.com>

Mensanator wrote:

> Ok, I agree with 101, but I wouldn't necessarily
> say the others were unfortunate. You might be
> surprised at how often such fixations discover
> bugs, something that I have a gift for.

The discovering, the making, or both? ;)

Tim Delaney


From deets at nospam.web.de  Wed May 21 11:10:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 17:10:56 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
	<4540a28e-59b4-4903-8c93-6239eb257c1f@j22g2000hsf.googlegroups.com>
Message-ID: <69iscvF33u2peU1@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

> On May 21, 4:09 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> cokofree... at gmail.com wrote:
>>
>> >> And wastes time. regular expressions can become expensive to match -
>> >> doing it twice might be hurtful.
>>
>> >> Diez
>>
>> > match = (my_re1.match(line) or my_re2.match(line)) or
>> > my_re3.match(line)
>>
>> How do you know *which* of the three has matched then?
>>
>> Diez
> 
> Depends if the OP wants to know that...

Well, in *general* one wants that. So as a general-purpose solution this is
certainly *not* the way to go.

Diez


From george.sakkis at gmail.com  Mon May  5 23:22:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 5 May 2008 20:22:49 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com> 
	<fvohne$m0f$1@news.xmission.com>
Message-ID: <96a41fd1-23ca-482f-9575-5123611ade8a@z72g2000hsb.googlegroups.com>

On May 5, 11:02 pm, dave <squareswallo... at yahoo.com> wrote:
> On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>
>
>
> > dave <squareswallo... at invalid.com> writes:
>
> >> Hello,
>
> >> I made a function that takes a word list (one word per line, text
> >> file) and searches for all the words in the list that are 'shifts' of
> >> eachother.  'abc' shifted 1 is 'bcd'
>
> >> Please take a look and tell me if this is a viable solution.
>
> >> def shift(word, amt):
> >>        ans = ''
> >>        for letter in word:
> >>                ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> >>        return ans
>
> > In Python, if you want to build a string from lots of parts you can
> > use ''.join(parts).  I think it is considered more efficient.
>
> what would be the best way to write a "ans = ans + chr" into a
> ''.join(parts) ??

Well if you do it once, that would be simply "ans += chr". Arnaud was
referring to the case where you do it in a loop, like in your snippet.
A direct translation to use ''.join would be:

ans = ''.join(chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
              for letter in word)

Of course it is simpler and more efficient if you factor out of the
loop the subexpressions that don't need to be recomputed:

ord_a = ord('a')
shift = ord_a - amt
ans = ''.join(chr((ord(letter) - shift) % 26 + ord_a)
              for letter in word)

George


From mail at timgolden.me.uk  Thu May  8 10:06:16 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 08 May 2008 15:06:16 +0100
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <fvut8a$b67$1@theodyn.ncf.ca>
	<op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <482308D8.3050106@timgolden.me.uk>

Gabriel Genellina wrote:
> En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:
> 
>> The readme.txt has:
>>
>> All you need to do is open the workspace
>> "pcbuild.sln" in Visual Studio,
>> select the desired combination of
>> configuration and platform and eventually
>> build the solution. Unless you are going
>> to debug a problem in the core or
>> you are going to create an optimized
>> build you want to select "Release" as
>> configuration.
>>
>> Unfortunately, the Express Edition
>> (Free) doesn't handle "solution" files.
> 
> Python builds fine with Visual C++ Express Edition.
> Select Release, Win32 from the dropdown lists, press F7, 
> and wait for compilation to complete...

Or, if you prefer not to have the long startup time for Visual Studio,
simple start a command prompt in python\pcbuild, call the env
cmd script and then the build script:

<screendump>
C:\temp>cd \work_in_progress

C:\work_in_progress>cd python

C:\work_in_progress\python>cd PCbuild

C:\work_in_progress\python\PCbuild>env
Build environments: x86, ia64, amd64, x86_amd64, x86_ia64

Setting environment for using Microsoft Visual Studio 2008 x86 tools.

C:\work_in_progress\python\PCbuild>build
vcbuild /useenv pcbuild.sln  "Release|Win32"
Microsoft (R) Visual C++ Project Builder - Command Line Version 9.00.21022
Copyright (C) Microsoft Corporation. All rights reserved.

Build started: Project: make_versioninfo, Configuration: Release|Win32
Compiling...

</screendump>

TJG


From johnroth1 at gmail.com  Fri May 23 11:01:52 2008
From: johnroth1 at gmail.com (John Roth)
Date: Fri, 23 May 2008 08:01:52 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>

On May 23, 3:36 am, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interested in this behavior?

I'm not. If there are any changes in the current behavior I'd much
prefer that unittest create a random permutation as a way of flushing
out intertest dependencies.

> Does the following patch has a chance of being introduced in the
> standard python distribution?

I certainly hope not!

John Roth
Python FIT



From murder_113 at hotmail.com  Sun May  4 19:46:31 2008
From: murder_113 at hotmail.com (Chunky)
Date: Mon, 5 May 2008 01:46:31 +0200
Subject: Python Poker
Message-ID: <BAY105-DS151A39D9CB408484DF4A9BAD40@phx.gbl>

hey Jeff Sandys sandysj at juno.com 

did you manage to get your game up for download it sounds really interesting i love "home made games"
-------------- next part --------------
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From dcoffin at gmail.com  Mon May  5 10:14:48 2008
From: dcoffin at gmail.com (dcoffin at gmail.com)
Date: Mon, 5 May 2008 07:14:48 -0700 (PDT)
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <2e022afa-8593-452f-aa73-1837f339944a@m44g2000hsc.googlegroups.com>

> the class-thing seems inside out somehow in python. if im doing
> foo.Hello() im already saying that im using the class foo because i
> did foo=Foo() before and then still when calling Hello() i am
> invisibly passing the class itself a s a parameter by default?
> just seems backwards and weird.

You're not passing a reference to the class, you're passing a
reference to the object. Any object-orientated programming language
will be passing methods references to an object; Python just makes
that explicit within the method definition. See http://www.python.org/doc/faq/general/#id35


From johnjsal at NOSPAMgmail.com  Tue May 20 16:21:04 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 16:21:04 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
	<g0umoh$i0s$1@news.lysator.liu.se>
Message-ID: <48333296$0$28632$c3e8da3@news.astraweb.com>

"Thomas Bellman" <bellman at lysator.liu.se> wrote in message 
news:g0umoh$i0s$1 at news.lysator.liu.se...
> "John Salerno" <johnjsal at NOSPAMgmail.com> writes:
>
>> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
>> news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
>>> the above code is pretty much of a no-no because it has quadratic 
>>> runtime
>>> behavior.
>
>> What's that mean, exactly?

> However, it actually depends on what your input is.  For the
> runtime to increase with the square of the input length in your
> function, the number of *unique* items on the input must be a
> constant fraction of the input length.

Whew! Let me re-read your post...........   :) 




From Thomas.Karolski at googlemail.com  Fri May 23 15:25:19 2008
From: Thomas.Karolski at googlemail.com (Thomas Karolski)
Date: Fri, 23 May 2008 21:25:19 +0200
Subject: Decorator metaclass
In-Reply-To: <200805230739.29745.maric@aristote.info>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<200805230739.29745.maric@aristote.info>
Message-ID: <g175nc$4ao$1@ger.gmane.org>

Turns out the first msg I sent did not reach the list, so I'll just post 
what I've achieved by now:
------------------------------------------
class DecoratorDummy(object): pass

class InheritedDecoratorType(type):
	def __new__(cls, name, bases, dct):
		# return if its a class which inherited from Decorator
		if Decorator in bases:
			return type.__new__(cls, name, bases, {})
		
		# if its a class which did not directly inherit from Decorator,
		# then it inherited from a class which has been manipulated using the
		# Decorator class.
		# in that case we change the bases of the inheriting class.
		# We'll split the manipulated class into Decorator and its implementation
		for b in bases:
			if type(b) is InheritedDecoratorType:
				break
		newbases = [x for x in bases]
		# remove the manipulated base class
		newbases.remove(b)
		# and add the impl of the manipulated base class
		newbases.append(b._impl_type)
		# and add the Decorator class
		newbases.append(Decorator)
		# now we'll have to make sure the dict of the new class shows the 
original base class
		# (which has been removed) as the implementation class
		dct[b.__name__] =  b._impl_type
		# since we have added a Decorator class, we ought to get rid of it
		# through the DecoratorType metaclass
		r = DecoratorType.__new__(cls, name, tuple(newbases), dct)
		
		return r

class DecoratorType(type):
	def __new__(cls, name, bases, dct):

		# if the first class is DecoratorDummy, then we're handling the
		# Decorator class, which is not supposed to be modified
		if bases[0] is DecoratorDummy:
			return type.__new__(cls, name, bases, {})
		
		# if one of the bases is the Decorator class
		b = [x for x in bases]
		if Decorator in b:
			# create a new impl type which inherits from every but the decorator 
class
			b.remove(Decorator)
			
		impl_type = type('%sImpl'%name, tuple(b), dict(dct))
		# make the returned type no longer a DecoratorType, but rather a 
normal type
		# Types which inherit from a class which inherited from Decorator, 
will thus
		# *not* be put through this metaclass.
		#dectype = type.__new__(type, name, tuple(b), {'_impl_type' : impl_type })
		dectype = type.__new__(InheritedDecoratorType, name, tuple(b), 
{'_impl_type' : impl_type })
		
		# update the old class to implement this implementation
		def __init__(self, *args, **dargs):
			new_impl = impl_type(*args, **dargs)
			super(dectype._impl_type, new_impl).__init__(*args,
															 **dargs)
			object.__setattr__(self, '_impl', new_impl)
		def decorator(self):
			return object.__getattribute__(self, '_impl')
		def __getattribute__(self, attr):
			if attr=="decorator":
				return object.__getattribute__(self, 'decorator')
			
			# if we have a specified method inside the decorator().__decorate__ var,
			# then call decorator().attr(), otherwise proxy the call
			d = object.__getattribute__(self, 'decorator')()
			if attr in d.__decorate__:
				return getattr(d, attr)
			return getattr(d.getParent(), attr)
		dectype.__init__ = __init__
		dectype.decorator = decorator
		dectype.__getattribute__ = __getattribute__
		
		return dectype

class Decorator(DecoratorDummy):
		__metaclass__ = DecoratorType

class Window(object):
	def __init__(self, parent):
		print "Window::__init__(%s)"%self
		self._parent = parent
	
	def setParent(self, parent):
		self._parent = parent
	
	def getParent(self):
		return self._parent

class Textarea(Window):
	def draw(self):
		print "Textarea::draw()"

class HBar(Decorator, Window):
	__decorate__ = ["draw"]
	def __init__(self, parent):
		print "HBar::__init__(%s)"%self
		Window.__init__(self, parent=parent)
		
		self._progress = 0.0
		
	def setProgress(self, p):
		print "setting progress to %s"%p
		self._progress= p
		
	def getProgress(self):
		return self._progress
	
	def draw(self):
		self.getParent().draw()
		print "HBar::draw()"
		
class HBarTrue(HBar):
	# HBar's bases: Window (Decorator removed by metaclass)
	# HBar's methods: __init__, decorator, __getattribute__
	# everything else is inside decorator()
	# we thus need to make calls to self within HBarTrue,
	# calls to self.decorator() - this is not possible
	# Otherwise we could also let HBarTrue inherit from HBarImpl,
	# however then a call to HBar.__init__ would be invalid inside
	# HBarTrue.__init__ unless we specify HBar internally as being HBarImpl
	# - this however is not possible
	# if we inherit from HBarImpl, then we no longer have the decorator
	# functionality. We'd thus have to include Decorator in the list of bases
	
	# Inherit normally from HBar and not Decorator.
	# Move all methods from HBarTrue to HBar.decorator()
	# create a custom __init__ method which calls HBar.decorator().__init__
	
	def __init__(self, parent):
		print "HBarTrue::__init__(%s)"%self
		for each in dir(self):
			print each
		HBar.__init__(self, parent)
		
		self.setProgress(0.0)

myTextarea = Textarea("main.parent")
myTextarea.draw()
myTextarea = HBarTrue(myTextarea)
myTextarea.draw()
myTextarea.decorator().setProgress(100.0)
------------------------------------------
The code above works only if I don't inherit from HBar like I did.
As it is now, the HBar class, which inherits from Decorator and Window, 
is going to be manipulated by the metaclass. During this process the 
Decorator base-class is removed, the implementation of HBar moved into 
_impl_type and the methods __init__, decorator and __getattribute__ are 
being assigned to the new class.
Everything works so far if I don't subclass HBar.
If I do subclass HBar, then the subclass goes through the second 
metaclass (InheritedDecoratorType). In there I replace the base class 
HBar with HBarImpl and Decorator. This way the subclass inherits the 
implementation of HBar and through the Decorator class then the subclass 
goes through the same metaclass magic as HBar in the first step. Of 
course however, since HBarTrue is no longer a subclass of HBar (since 
that baseclass has been removed), the HBar.__init__ method won't accept 
the non HBar self parameter.

Now the reason why I'm using decorators, is because I want to be ably to 
add the functionality dynamicly - without the need of construction 
classes for the different possibilities. Composite pattern does not help 
in this case, since I lose the ability to choose in what order I call 
the decorator's and the decorated's methods.

I'll just keep trying. Any input greatly appreciated.

Regards,
Thomas K.



From VBG at extnet.net  Thu May 29 16:26:52 2008
From: VBG at extnet.net (Hung Well (no comma))
Date: Thu, 29 May 2008 15:26:52 -0500
Subject: so funny...
References: <620361d6-5eb2-482a-8e28-4b2e9c906ece@26g2000hsk.googlegroups.com>
Message-ID: <fkE%j.3193$Q57.450@nlpi065.nbdc.sbc.com>


"John" <fariba42064 at yahoo.com> wrote in message 
news:620361d6-5eb2-482a-8e28-4b2e9c906ece at 26g2000hsk.googlegroups.com...
> http://sitscape.com/topic/funny
>
> Just keep hit the "Surprise->" button there for amazing fun.
> Click on "channel" will show you other topics, lots of fun!


You tickle easy.

--WH 




From bruno.desthuilliers at gmail.com  Mon May 19 16:42:16 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:42:16 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>

On 19 mai, 20:07, Vicent Giner <vgi... at gmail.com> wrote:
> On May 19, 6:11 pm, Henrique Dante de Almeida <hda... at gmail.com>
> wrote:
>
(snip)
> >  The situation would be simpler if there were good well-known toolkits
> > for optimization in python (like numpy for matrix operations), but
> > that's not the case.
>
> Are there such toolkits in other languages? I am not sure they exist
> in C, for example.

Well... They do - they are called 'C compilers' !-) As Roel Schroven
mentioned - and he is at least partially right on this point - C has
been designed to make optimizing C compiler not to hairy to write.

> By the way, is it possible (and easy) to call a C function from a
> Python program??

Possible, yes, indeed. Easy depends on your definition of easiness,
but  going down to C for computation-heavy performance-critical parts
of a program or library is not that uncommon.


From skanemupp at yahoo.se  Tue May 13 14:41:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:41:58 -0700 (PDT)
Subject: variable scope question?
Message-ID: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>

http://mail.python.org/pipermail/python-list/2003-October/233435.html

why isnt it printing a in the second(second here, last one in OP)
example before complaining?

def run():
  a = 1
  def run2(b):
    a = b
    print a
  run2(2)
  print a
run()

def run():
  a = 1
  def run2(b):
    print a
    a = b
  run2(2)
  print a
run()


From GustavoTabares at gmail.com  Mon May 12 10:41:19 2008
From: GustavoTabares at gmail.com (GustavoTabares at gmail.com)
Date: Mon, 12 May 2008 07:41:19 -0700 (PDT)
Subject: Removing option from optparse
Message-ID: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>

Hello,

I'm trying to figure out if the following is a bug or if I'm using the
remove_option in the wrong way.

#!/usr/bin/env python
import optparse
parser = optparse.OptionParser()
parser.add_option("--test", help="This is a test option")
parser.remove_option('--test')
print parser.parse_args()

this will output:
(<Values at 0x6beb8: {'test': None}>, [])

If you execute the --help on the file above you will not see --test as
expected. I'm curious as to why parse_args is still returning this as
an option.

Thanks,
Gustavo


From kamhung.soh at gmail.com  Thu May  1 02:00:33 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 01 May 2008 16:00:33 +1000
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23>
Message-ID: <op.uagoa7vhev04yd@melwxp23>

On Wed, 30 Apr 2008 17:12:15 +1000, Kam-Hung Soh <kamhung.soh at gmail.com>  
wrote:

> On Wed, 30 Apr 2008 15:27:36 +1000, Raymond <not-for-mail at sonic.net>  
> wrote:
>
>> For some reason I'm unable to grok Python's string.replace() function.
>> Just trying to parse a simple IP address, wrapped in square brackets,
>> from Postfix logs. In sed this is straightforward given:
>>
>> line = "date process text [ip] more text"
>>
>>   sed -e 's/^.*\[//' -e 's/].*$//'
>>
>> yet the following Python code does nothing:
>>
>>   line = line.replace('^.*\[', '', 1)
>>   line = line.replace('].*$', '')
>
> str.replace() doesn't support regular expressions.
>
> Try:
>
> import re
> p = re.compile("^.*\[")
> q = re.compile("].*$")
> q.sub('',p.sub('', line))
>

Another approach is to use the split() function in "re" module.

import re
re.split("[\[\]]", line)[1]

See http://docs.python.org/lib/node46.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From netizen at gmx.de  Fri May 23 10:59:17 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 16:59:17 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
	<5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>
	<Xns9AA79A81E3F08duncanbooth@127.0.0.1>
Message-ID: <4jmd34h5cjigp50uvk0p14td5sjqiokgj2@4ax.com>

.oO(Duncan Booth)

>Michael Fesser <netizen at gmx.de> wrote:
>
>> The only little problem is that PHP doesn't have native Unicode
>> support yet, which will change with PHP 6. But of course you can still
>> use UTF-8 without any trouble, I do it all the time. You just have to
>> keep in mind that many string functions still work on bytes, not on
>> characters, but this can almost always be solved with the Multibyte
>> extension. Apart from that there's no problem with PHP and UTF-8. It's
>> also easily possible to convert between various encodings using the
>> iconv extension. 
>> 
>As I remember it the problem was that the data was stored in a database 
>in latin-1 but the HTML page had to be in utf-8 (because the rest of the 
>server and therefore all the page skins were already in utf-8). In 
>python that would be a trivial conversion but I was told that in PHP it 
>wasn't.

It would have been trivial in PHP as well, assuming the DB was MySQL,
which could have done this conversion automatically when sending the
data to the script.
 
>But one small example isn't really the point. It's that the whole way 
>Python works seems *to me* to make sense and (mostly) fits together 
>cleanly and consistently. YMMV

Fair enough. The nature of PHP as being a grown language has its
advantages, but also a lot of drawbacks, which are hard to solve.

Micha


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:28:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:28:33 +0200
Subject: named tuple mutability
In-Reply-To: <873aokzgs9.fsf@benfinney.id.au>
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
Message-ID: <482be615$0$10798$426a34cc@news.free.fr>

Ben Finney a ?crit :
> "bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:
> 
>> On 14 mai, 18:20, castiro... at gmail.com wrote:
>>> I'm concerned over the future of Python.  Should tuples be named?
>> Obviously not, unless they should.
> 
> Clearly they should, unless not.
> 
May we agree to disagree here - unless we don't ?


From skanemupp at yahoo.se  Mon May  5 07:57:25 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 04:57:25 -0700 (PDT)
Subject: confused about self, why not a reserved word?
Message-ID: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>

class Foo(object):
	def Hello(self):
		print "hi"

object is purple, ie some sort of reserved word.

why is self in black(ie a normal word) when it has special powers.
replacing it with sel for example will cause an error when calling
Hello.


From efurman at admailinc.com  Mon May 19 13:42:58 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Mon, 19 May 2008 09:42:58 -0800
Subject: Dbase / foxpro files
In-Reply-To: <1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>	<mailman.1235.1210959453.12834.python-list@python.org>
	<1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>
Message-ID: <4831BC22.1040809@admailinc.com>

Johny wrote:

>Thanks for your reply.Is it possible to delete a record by using the
>module?
>Thanks
>L>
>--
>http://mail.python.org/mailman/listinfo/python-list
>  
>
It is possible with mine.  To clarify an earlier post, my module is for 
dBase III and VFP 6.0 files only (those were the only two I needed :).

Hope this helps.
--
Ethan



From darcy at druid.net  Thu May  8 16:14:37 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 8 May 2008 16:14:37 -0400
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <20080508161437.531ab1d9.darcy@druid.net>

On Thu, 8 May 2008 11:02:14 -0500
"Maryam Saeedi" <ma.saeedi at gmail.com> wrote:
> I was wondering if you know how can I run a python code once every five
> minutes for a period of time either using python or some other program like
> a bash script.

Use cron.

> I have asked this question before and some of you answered me but I still
> have problem. Most of the answers was to use cron and crontab which works on
> my computer but not if I want to do it on department's computer since I do
> not have permission to change those files. Is there any other way which does
> not need administrator permission?

Same answer.  Download the source for cron from somewhere (NetBSD,
FreeBSD, Linux, whatever), compile it and run it yourself.  You can't
run setuid but if you want something that acts like cron, cron fits the
bill.  Ain't open source wonderful?  :-)

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From skanemupp at yahoo.se  Mon May  5 09:37:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 06:37:35 -0700 (PDT)
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
Message-ID: <9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>

sorry i noticed now a little error, i was playing around a lot and saw
that on the sel-example i had then called foo.hello() instead of
foo.Hello().


but it was an informing error now i egt it. was wondering about self
anyway so thanks for clearing it up.


but it still is a bit confusing that u can pass with any word.
wouldnt:


class Foo(object):
	def Hello():
		print "hi"


make more sense?

the class-thing seems inside out somehow in python. if im doing
foo.Hello() im already saying that im using the class foo because i
did foo=Foo() before and then still when calling Hello() i am
invisibly passing the class itself a s a parameter by default?
just seems backwards and weird.


From gagsl-py2 at yahoo.com.ar  Fri May  9 02:55:27 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:55:27 -0300
Subject: Bug in email.utils, parseaddr
References: <fb5d57bf-1840-43c7-8b31-2abd2dd88e9b@f63g2000hsf.googlegroups.com>
Message-ID: <op.uavj6pwpx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 02:55:46 -0300, Roopesh <roopesh.raj at gmail.com>  
escribi?:

> I tried using parseaddr of email.utils, but it gave the following
> result when the name had a comma inside.
>
>>>> e = 'K,Vishal <vishal at someaddress.biz>'
>>>> from email.utils import parseaddr
>>>> parseaddr(e)
> ('', 'K')

That's an invalid address. A comma "," is a special character and it  
cannot happen inside an atom, it must be quoted. See section 3.4 in  
RFC2822 <http://www.faqs.org/rfcs/rfc2822.html>

-- 
Gabriel Genellina



From zaphotbretzel at yahoo.com  Mon May 19 11:06:47 2008
From: zaphotbretzel at yahoo.com (zaphotbretzel at yahoo.com)
Date: Mon, 19 May 2008 08:06:47 -0700 (PDT)
Subject: installing MySQLdb module
References: <80f805f0-6829-4da3-bfb4-79875bb16114@a22g2000hsc.googlegroups.com>
Message-ID: <75c38402-41a5-480b-b65d-463c8cc43fc4@25g2000hsx.googlegroups.com>

Hi Rafael,

> I googled around and people say you need the "-dev" package of mysql
> in order to have the C headers...where can you download this for mac
> os?
> PS I am running XAMPP (http://www.keitr.com/tutorials/xampp) if that
> changes anything

Ok, here my solution to the problem (Mac OS X 10.4, Xampp and MySQLdb)

1) install Xcode from apple (for gcc, need free account for that,
http://developer.apple.com/)
2) get Mac binary tar from MySQL (http://dev.mysql.com/downloads/mysql/
5.0.html#macosx)
3) edit site.cfg (mysql_config = /Applications/xampp/xamppfiles/bin/
mysql_config)
4) copy include dir from MySQL package to /Applications/xampp/
xamppfiles/include/mysql

I bet downloading the same version from MySQL as installed from Xampp
could help.
And yes, you only need the include folder from the MySQL binary
package, do not install it.

Peace,
     Zaphot


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:23:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:23:40 -0300
Subject: how to pass C++ object to another C++ function via Python function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
	<136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>
Message-ID: <op.uajppqc7x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 00:26:38 -0300, grbgooglefan <ganeshborse at gmail.com>  
escribi?:

> On Apr 22, 7:54?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>>
>> If you have a C function that receives a PyCObject, just include the ?
>> relevant headers (cobject.h) and you can retrieve the original pointer ?
>> using PyCObject_AsVoidPtr:
>>
>
> This works. But only once, means if I try to use this object second
> time in Python function it causes crash.
>
> What I am doing in my program is that I am putting STL map in a
> structure & passing that structure as object to a Python function
> alongwith other agurments of that Python function. This briefly as
> below:
>
> // In pyinterface.h file:---
> typedef hash_map<char*,int> Elements;
> typedef hash_map<char*,Elements*,StringHash,eqstr>
> PerExchGroupsElementsTable;
> typedef struct capsule {
>         PerExchGroupsElementsTable* refgrps;
> } *pcapsule;
>
> // In pyinterface.cpp file:---
> numvars = // value set depending on number of variables of that python
> function
> PyObject *pTuple = PyTuple_New(numvars);
>
> // Set variables as below:
> for(nCtr = 0; nCtr < numvars; nCtr++){
>      slot = prul->pVarLst[nCtr].slot;
>      ndtyp = ordvars[slot].dtype;
>      switch(ndtyp){
>        case(INT_T):
> PyTuple_SetItem(pTuple,nCtr,PyInt_FromLong(ordvars[slot].nvalue));
>            break;
>        case(FLOAT_T):
> PyTuple_SetItem(pTuple,nCtr,PyFloat_FromDouble(ordvars[slot].fvalue));
>            break;
>        case(STRING_T):
> PyTuple_SetItem(pTuple,nCtr,PyString_FromString(ordvars[slot].cvalue));
>            break;
>        default:
>            printf("\nUnknown data type [%d] for %s\n",ndtyp,prul-
>> pVarLst[nCtr].var);
>            bUnknownDataType = true;
>            break;
>      }
>      if(bUnknownDataType){
>         ret = -1;
>         break;
>      }
> }
>
> // Then set the C++ object as below:
> if(ret == 0){
>     capsule grpob;
>     if(pGroups){
>       grpob.refgrps = pGroups; // pGroups is pointer to
> PerExchGroupsElementsTable map & is global.
>       int ret = PyTuple_SetItem(pTuple,
> (numvars-1),PyCObject_FromVoidPtr((void *)&grpob, NULL));
>     }

This look suspicious - what if !pGroups? You can't leave a tuple item  
uninitialized - if you create a tuple with PyTuple_New(3), then you have  
to fill the 3 items.
And beware of that local variable grpob - you're using a pointer to it,  
and it won't be valid when execution goes out of this block. You must  
ensure that nobody stores a reference to it.
And you should decref the tuple even if this block isn't executed.

>     PyObject *ptr = PyObject_GetAttrString(_pPyModule,fname);
>     if(PyErr_Occurred() || *ptr == NULL){
>         printf("PyObject_GetAttrString failed:%s",fname);
>         return;
>     }
>     if(!PyCallable_Check(*ptr)){
>        printf("%s not a callable Python code\n",fname);
>        Py_XDECREF(*ptr);
>        *ptr = NULL;
>        return;
>     }

All those *ptr should be ptr (the compiler should issue a lot of warnings,  
I presume?)

> What happens is that when Python function TSE581 gets called from my C
> Program via PyObject_CallObject (as shown at top of this post), co1
> function works fine & can access the map pointer properly.
> But when next function like1 gets called, crash happens.
>
> My queries are & things on which I need help are:
> 1) Is there anything wrong I am doing when I am passing the C-Object
> from my C++ code->Python -> C++ code again?

I see nothing obviously wrong, except the above notes. If you get warnings  
 from the C++ compiler, try to fix all of them.

> 2) Am I missing to increase or decrease the reference count somewhere.

In case of error you exit early but without releasing some existing  
objects. (Sometimes a goto statement *is* the right thing to do)

> 3) I dont want map pointer to be ever freed because it is Process
> level data structure & requried at every execution of these Python
> functions. How do I avoid its cleanup when it gets passed to Python &
> Python cleans up those objects.

Python will do nothing with the pointer inside a PyCObject - unless you  
want to, and pass a cleanup function as the second argument to the  
PyCObject constructor.

-- 
Gabriel Genellina



From dullrich at sprynet.com  Tue May 27 11:59:24 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 10:59:24 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
	<mailman.1649.1211900977.12834.python-list@python.org>
Message-ID: <dullrich-23C081.10592427052008@text.giganews.com>

In article <mailman.1649.1211900977.12834.python-list at python.org>,
 "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Tue, 27 May 2008 11:52:25 -0300, David C. Ullrich  
> <dullrich at sprynet.com> escribi?:
> 
> > Oh. Never mind the details, let's just say that having 2.3 and
> > 2.5 installed on the same machine can lead to confusion
> > about exactly which one you're running a script under.
> > Duh.
> 
> You might change the prompt; put these lines in your sitecustomize.py (or  
> create it if you don't have one):
> 
> import sys
> sys.ps1 = 'p23> '
> sys.ps2 = ' ... '

Thanks. I guess I should have included details that I thought
would be of no interest to save people time with replies.

The problem is that on the Mac in question Terminal thinks
python is 2.5 (as does Idle) while when I double-click on a
file in Finder it runs under python 2.3. In particular it
never happens that I'm running an interactive session under
2.3.

(No, I'm not saying that's a good setup - it's a mess. The
other Mac, at the office, is not such a mess, but I never
could get things like Idle to work under the Apple Python...)

> > Sorry. Thanks. I don't suppose that decorators are available
> > from __future__ somehow in 2.3?
> 
> No. But a decorator is only syntax sugar.
> 
> @decorator
> def f():
>    ...
> 
> is the same thing as:
> 
> def f():
>    ...
> f = decorator(f)
> 
> (just more convenient)

-- 
David C. Ullrich


From jamesd at echeque.com  Thu May 22 05:48:52 2008
From: jamesd at echeque.com (James A. Donald)
Date: Thu, 22 May 2008 19:48:52 +1000
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
Message-ID: <g2ga34h4o90us3dvush5tf38pnkg78neh8@4ax.com>

On Fri, 16 May 2008 11:21:39 -0400, "inhahe" 
<inhahe at gmail.com> wrote:
> They say that the C++ optimizer can usually optimize 
> better than a person coding in assembler by hand can, 
> but I just can't believe that, at least for me, 
> because when I code in assembler,

if one hand compiles C++ into assembler, the result will 
doubtless be crap compared to what the compiler will 
generate.  If, however, one expresses one's algorithm in 
assembler, rather than in C++, the result may well be
dramatically more efficient than expressing one's
algorithm in C++ and the compiler translating it into
assembler.  A factor of ten is quite common.

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From krumblebunk at gmail.com  Tue May  6 11:20:37 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 08:20:37 -0700 (PDT)
Subject: Reversing a dict?
Message-ID: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>

Hi - further to my earlier query regarding partial matches (which with
all your replies enabled me to advance my understanding, thanks), I
now need to reverse a dict.

I know how to reverse a list (with the reverse method - very handy),
but it doesn't seem possible to reverse a dict.

I suspect what I need to do is somehow go from:

thelist=list(thedict)
thelist.reverse()
thedict=dict(thelist)

Does anyone know how to convert / or reverse a dict?

thanks

kb.





From duncan.booth at invalid.invalid  Sun May 11 15:50:34 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 19:50:34 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <Xns9A9BD40562CBFduncanbooth@127.0.0.1>

bc90021 <python at bc90021.net> wrote:

> The error message was at the top of the thread (am I incapable of
> posting it, or are you incapable of following a thread?), but here it
> is again: 
> 
> IOError: [Errno 2] no such file u'tempfileName'

So which was it? At the top of the thread you said it was:

IOError: [Errno 2] no such file u'fileName'

How about posting the exact error message you got, including all of the 
traceback and the complete original code: even when you posted "Here's the 
thread class" you actually posted a modified version of your thread class 
(with sarky comments added even if nothing else was changed).

If you post complete code and the full traceback then you'll probably get a 
quick and accurate response telling you what the problem is. If you 
continue to paraphrase and post bits and pieces you'll continue to get 
random guesses.



From bignose+hates-spam at benfinney.id.au  Sun May 11 23:46:07 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 13:46:07 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
Message-ID: <87zlqw6v7k.fsf@benfinney.id.au>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Yves Dorfsman <yves at zioup.com> writes:
> > I know you can't assign anything to None, but I'm sure you get what I
> > mean, a special keyword that means I don't care about this value.

Snap. This topic was raised today in another thread.

> You can just use a variable name than you ignore. It's traditional
> to use _ but it's not a special keyword, it's just a another
> variable name:
> 
>    y, _, d, _, _, _, _, _, _ = time.localtime()

It's a terrible name for that purpose, since it doesn't indicate the
intention explicitly, and it's already overloaded in meaning by a
pre-existing convention (ref. the 'gettext' module in Python and many
other languages).

Far better to use the name 'unused' as suggested by Carl Banks earlier
today.

(good sigmonster, have a cookie)

-- 
 \            "Choose mnemonic identifiers. If you can't remember what |
  `\                mnemonic means, you've got a problem." ?Larry Wall |
_o__)                                                                  |
Ben Finney


From stefan_ml at behnel.de  Fri May  9 11:50:14 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 17:50:14 +0200
Subject: A question about python and xml
In-Reply-To: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
References: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
Message-ID: <482472B6.603@behnel.de>

Holden wrote:
> I want to make a web site that uses the python programming
> language which I am VERY new at. This website would store simple data
> such as names in a form. At first I wanted to use mysql to store the
> data but I want to export the data using xml.
> 
> So say if a user logged in they would be able to store there basic
> information in an xml file and download it whenever. Is that possible
> using XML and Python. I am sorry if this post doesn't make much sense
> but any advice would be greatly appreciated. You can also e-mail me if
> you need further information or clarification.

Generating XML from your data shouldn't be too hard once it's in a database.
The harder part is getting it in there through a web interface. I would look
at a dedicated web framework like Django first:

http://www.djangoproject.com/

Stefan


From skanemupp at yahoo.se  Fri May 16 09:04:16 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:04:16 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
Message-ID: <9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>

On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
> Christian Heimes wrote:
> > globalrev schrieb:
> >> cust1 = customer.__init__('12',['1','435','2332'])
>
> > cust1 = customer('12',['1','435','2332'])
>
> ... and before that
>
> from customer import customer
>
> Peter

why do i have to write that?

if i do import customer im importing everything no?

but youre right it doesnt work unless i do, i just dont get why.


From arnodel at googlemail.com  Thu May 15 02:09:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 07:09:31 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
Message-ID: <m2k5hw9jz8.fsf@googlemail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
>> > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> >> __new__ is a static method!
>>
>> > __new__ is a special-cased staticmethod that  1/ must not be declared
>> > as such and 2/ takes the class object as first args. As far as I'm
>> > concerned, it's semantically a classmethod.
>>
>> It's a static method!
>
> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
> a staticmethod object. What I say is that
> 1/ it's special-cased since you don't *explicitely* declare it as a
> staticmethod
> 2/ it behaves just like a classmethod, since it takes the class as
> first argument.
>
> IOW, I'm talking about semantic, not implementation.

... and I was being facetious, not serious :)

-- 
Arnaud


From kyosohma at gmail.com  Fri May 16 09:22:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:22:01 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
	<CLudna01D6ocGrDVnZ2dnUVZ_u-dnZ2d@comcast.com>
Message-ID: <e8f5e837-6791-4598-8ddc-c2f048d216e9@b1g2000hsg.googlegroups.com>

On May 16, 8:09?am, Larry Bates <larry.ba... at websafe.com`> wrote:
> Mike Driscoll wrote:
> > On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> >> Mike Driscoll wrote:
> >>> Hi,
> >>> I've had this niggling issue from time to time. I want to create a
> >>> shortcut on the user's desktop to a website that specifically loads
> >>> Firefox even if Firefox is not the default browser.
> >>> I usually use COM as it allows very specific settings of the shortcut,
> >>> such as the Working Directory and the Target Path. However, the
> >>> following will not work for some reason:
> >>> <code>
> >>> import win32com.client
> >>> import winshell
> >>> shell = win32com.client.Dispatch('WScript.Shell')
> >>> userDesktop = winshell.desktop()
> >>> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> >>> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> >>> https:\www.myCompanyWebsite.com\auth\preauth.php'
> >>> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> >>> Firefox'
> >>> shortcut.save()
> >>> </code>
> >>> This creates the following target path (which doesn't work):
> >>> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> >>> \www.myCompanyWebsite.com\auth\preauth.php"
> >>> If I leave the website off, it works. If I leave the path to Firefox
> >>> out, it works too. Is there another method I can use other than
> >>> creating the shortcut by hand and using the shutil module?
> >>> Thank you for any ideas.
> >>> Mike
> >> Either you copied wrong or the problem is:
>
> >> "C:\"C:\Program Files...
>
> >> Note the C:\ is specified twice in the string. ?I think it should read:
>
> >> ?> "C:\Program Files\Mozilla Firefox\firefox.exe" https:
> >> ?> \www.myCompanyWebsite.com\auth\preauth.php"
>
> >> -Larry
>
> > Yeah, I know that it's in there twice and that that is the problem.
> > But I'm not causing that extra C:\. I run it exactly as above and that
> > is what I get for the output. I think it's the COM object. Maybe I
> > better just re-post this to the PyWin32 list...
>
> > Thanks,
>
> > Mike
>
> I use Inno Setup on most of my applications and use it to create my desktop,
> quicklaunch and Start shortcuts. ?Would that be an option for you?
>
> -Larry

I use Inno too for my applications. However, in this case, I have to
create the shortcut as part of the login process based on what group
the user is in. Chris's solution worked for my needs and I think
Gabriel's will work too, if I figure it out.

Mike


From arnodel at googlemail.com  Mon May 12 08:59:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 05:59:58 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> 
	<48283881@news.mel.dft.com.au>
Message-ID: <bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>

On May 12, 1:30?pm, John Machin <sjmac... at lexicon.net> wrote:
> Duncan Booth wrote:
[...]
> > I think the variant I came up with is a bit clearer:
>
> > for i in range(1,101):
> > ? ?print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>
> More than a bit clearer, IMO. How about
> ? ? ?print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
> (or perhaps
> ? ? ?print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
> to save looking up the precedence rules) ?

Stuff clarity!  How about

for i in xrange(1, 101):
    print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i

--
Arnaud



From wizzardx at gmail.com  Sat May  3 15:56:38 2008
From: wizzardx at gmail.com (David)
Date: Sat, 3 May 2008 21:56:38 +0200
Subject: State machine Example in Python
In-Reply-To: <18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>
References: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
	<18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>
Message-ID: <18c1e6480805031256i597eaa1jb9dbcffecee9c169@mail.gmail.com>

>  There's plenty of results. Be more specific if you can't get what you
>  want from Google.

You'll probably find what you're looking for here:

http://wiki.python.org/moin/FiniteStateMachine

David.


From alokkat at gmail.com  Wed May 28 09:31:22 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 09:31:22 -0400
Subject: Struct usages in Python
In-Reply-To: <c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
Message-ID: <e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>

I am getting following error when tried as you suggested.

self.event = []  #Create an empty list, bind to the name "event" under the
"self" namespace
           self.event.append(Event())   #Create an event object and append
to the end of the list

*class Event():
                ^
SyntaxError: invalid syntax*


On Wed, May 28, 2008 at 1:07 AM, Patrick Mullen <saluk64007 at gmail.com>
wrote:

> I don't know if this will go through (my posts seem to have become blocked
> lately), but I'll give it a shot anyhow.
>
> You seem to be under a misconception that a python list is similar to a
> list in say, Java or other languages that have a rigid idea of variables and
> types.  In python, a list is a list of objects - any type of object can be
> stored in a list.  Just as you don't declare types for variables, you also
> don't declare types for lists.  Here is your modified code:
>
> class Event():
>    def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
> clrTime=""):
>      self.cameraEventType = cameraEventType
>      self.zone = zone
>      self.setDay = setDay
>      self.setTime = setTime
>      self.clrTime = clrTime
>
> class EventTimeFilter:
>    def __init__(self):
>            self.event = []  #Create an empty list, bind to the name "event"
> under the "self" namespace
>            self.event.append(Event())   #Create an event object and append
> to the end of the list
>
>
> Python won't stop you from putting other objects into self.event besides
> Event objects, but in practice this isn't often an issue.  The real benefit,
> is if you subclass event or make some other type of object that is similar
> to events, with maybe some of the same fields, you can still store them in
> the list and it will play along with the rest of your code.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From castironpi at gmail.com  Mon May 12 20:32:48 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 17:32:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>

On May 12, 6:39?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language. ?That's also one of the design goals of
> Flaming Thunder athttp://www.flamingthunder.com/?, which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

Can you render some furniture for me... to try to see some human
posture to lowest energy levels.


From afrobeard at gmail.com  Thu May 15 17:25:29 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 14:25:29 -0700 (PDT)
Subject: FTP upload issue
References: <44eede8c-05b5-441d-9207-210074e55f8f@f36g2000hsa.googlegroups.com>
Message-ID: <a37704b9-cf54-4235-b42d-3be27003926a@24g2000hsh.googlegroups.com>

First of all, it would be better to use:-

ftp.storlines("STOR " + remoteFileName, open(localFileName, "rb"))

rather than:-

ftp.storlines("STOR" + filename, file(filename))

Since the Python Documentation has this to say for open(): [Although ]

When opening a file, it's preferable to use open() instead of invoking
this constructor directly. file is more suited to type testing (for
example, writing "isinstance(f, file)").

Secondly Referring to another mail thread :
http://mail.python.org/pipermail/tutor/2006-February/045347.html
Quoting Kent :

fname should be just a bare name, e.g. 'mac.info2.txt'. You have to
ftp.cwd()
to the correct directory yourself. If it does not exists, create a tmp
directory. You're currently passing /tmp/mac.info2.txt to the ftp.

This should hopefully solve your problem.

P.S. I personally used to use ftputil[Really easy to use] and now I
use twisted. These libraries abstract a lot of stuff out for you.

On May 16, 1:25?am, davidj411 <davidj... at gmail.com> wrote:
> I am having difficulty uploading a text file using Python 2.5 on MAC
> OSX.
>
> SCRIPT
>
> filename='/tmp/mac.info2.txt'
> fh=open(filename,'w')
> fh.write('yes, i have a mac but don't hold that against me - just
> example data')
> fh.close()
>
> from ftplib import FTP
> 'host, username, and password are string variables that have already
> been defined.
> ftp = FTP(host)
> ftp.login(username,password)
> 'so far, logged in, all is well , error is on next line.
>
> ftp.storlines("STOR" + filename, file(filename))
> ftp.quit()
>
> What am i doing wrong? ?the file DOES exist, the path is correct, and
> the file ?was closed after being written. file(filename) should open
> it again for the upload?
>
> http://www.python.org/doc/lib/ftp-objects.htmlsays that the command
> should be an appropriate "STOR" command: "STOR filename". file is an
> open file object which is read...
>
> ERROR
> ? File "mac.inventory.py", line 44, in <module>
> ? ? ftp.storlines("STOR " + filename, file(filename))
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 437, in storlines
> ? ? conn = self.transfercmd(cmd)
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 356, in transfercmd
> ? ? return self.ntransfercmd(cmd, rest)[0]
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 327, in ntransfercmd
> ? ? resp = self.sendcmd(cmd)
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 241, in sendcmd
> ? ? return self.getresp()
> ? File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/ftplib.py", line 216, in getresp
> ? ? raise error_perm, resp
> ftplib.error_perm: 550 /tmp/mac.info2.txt: The system cannot find the
> path specified.



From arnodel at googlemail.com  Mon May 12 04:57:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:57:13 -0700 (PDT)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
Message-ID: <c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>

On May 12, 7:31?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Yves Dorfsman <y... at zioup.com> writes:
> > Is there anyway to tell python I don't care about a value ?
>
> > Say I want today's year and day, I'd like to do something like:
>
> > import time
> > y, None, d, None, None, None, None = time.localtime()
>
> > I know you can't assign anything to None, but I'm sure you get what I
> > mean, a special keyword that means I don't care about this value. In
> > this particular case, there's got to be a better way than:
>
> > d = time.local()
> > y = d[0]
> > d = d[1]
>
> I use Paul Rubin's solution (which is frown upon by many:), but it's
> true it would be nice for tuples to have something like an extract()
> method:
>
> y, d = time.localtime.extract(0, 2)
>
> Where
>
> ? ? mytuple.extract(i1, i2, i3...)
>
> would mean:
>
> ? ? tuple(mytuple[i] for i in (i1, i2, i3...))
>
> Or perhaps allow indexing by tuples:
>
> ? ? mytuple[i1, i2, i3...]
>
> --
> Arnaud

here is a very sophisticated implementation :)

>>> def extract(indices, seq):
...     return tuple(seq[i] for i in indices)
...
>>> y, d = extract((0, 2), time.localtime())
>>> y, d
(2008, 12)

--
Arnaud



From paul at boddie.org.uk  Wed May  7 06:56:30 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 03:56:30 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>

On 6 Mai, 19:22, vivai... at gmail.com (Ville M. Vainio) wrote:
> Excuse the long post.

Excuse the cherry-picking from your long post. ;-)

[...]

> Also, you can do what Paul Boddie did - fork the project, or maintain
> patches that are under LGPL. With a liberal license, you have that
> privilege.

Sure, my patches were LGPL, if you'd like to consider it that way, but
I have to point out that the derived work maintained by me became LGPL
as a result - I wasn't offering the non-Paul Boddie version under the
original licence as well. Now, I did leave a fair amount of
information about the heritage of the code, so that anyone who is
scared of the LGPL could just go and get the original work, but that
is probably your only viable option if you want to revert to the old
licensing.

[...]

> I don't think BSD/MIT like license really annoys anyone. Think python
> here ;-)

As some have pointed out, it can discourage people from contributing.
I've said many times before that some companies might not contribute
to a permissively licensed project because their competitors could
leverage the benefit in proprietary software, and I consider Linux and
the involvement of companies like IBM to be a reasonable example of
this.

[...]

> Not at all, it's a very practical thing related to all the
> intellectual property lawyerage in corporate setting. With Vellum, it
> doesn't matter a lot because most of the tools are only used in-house,
> but it would still be nice if you could just grab the code from
> somewhere without having to think about license at all, or considering
> whether any of this would ever be needed for something that involves
> selling stuff under proprietary license.

You can almost never just "grab the code from somewhere without having
to think about [the] license" since even permissive licences typically
have a list of conditions that must be observed. Certainly, they
aren't as demanding as those in copyleft licences, but by not
observing them you are infringing someone's copyright.

[...]

> Also, for some reason, GPL is used for evil (dual-licensing schemes -
> make money but still gain the open source mindshare, and possibly rack
> up free contributions to something that is your *commercial product*)
> more often than it's used for good (gcc, Linux kernel - prevent IP
> exploitation and ensure that all improvements are freely accessible).

The whole "evil" aspect of dual-licensing schemes is mostly to do with
copyright assignment (or the contribution agreement), not licensing,
although the licences typically employed obviously prevent the wider
community from making proprietary versions of the software, thus
creating the conditions for a dual-licensing business. That said, it's
easy to refuse to play along with such schemes if you're motivated:
just don't agree to assign your copyright to someone else, or don't
license your contributions under permissive licences (which
interestingly takes us back to the issue of Python contributions and
the associated list of acceptable licences).

These days, some companies are getting a lot of bad publicity about
their project governance: Sun seem to be getting continuous criticism
about the management of OpenOffice.org, and now that they've picked up
MySQL, they'll presumably be the target of criticism by people who had
to sign over their ownership of patches in order to feed the MySQL
corporate machine. But again, this isn't a sign that the licence was
the problem: it's what people were asked to do with the copyright
which effectively negated the benefits of the licence for those
wanting to keep the software free and open.

Paul


From arnodel at googlemail.com  Tue May 13 02:07:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 07:07:15 +0100
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
	<c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>
	<mailman.1005.1210632251.12834.python-list@python.org>
Message-ID: <m2lk2eivos.fsf@googlemail.com>

"Terry Reedy" <tjreedy at udel.edu> writes:

> "Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
> news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...
>
> here is a very sophisticated implementation :)
>
>>>> def extract(indices, seq):
> ...     return tuple(seq[i] for i in indices)
> ...
>>>> y, d = extract((0, 2), time.localtime())
>>>> y, d
> (2008, 12)
>
> ===================
> Or a generator version:
>
> # 3.0
> def extract(iterable, indexes):
>     # assume indexes are all legal
>     enext = enumerate(iterable).__next__
>     i,item = enext()
>     for index in indexes:
>         while i < index:
>             i,item = enext()
>         yield item
>
> import time
> print(list(extract(time.localtime(), (0,2))))
>
> #prints [2008, 12] 

but extract('python', (3, 1)) won't work!

-- 
Arnaud


From mdw at distorted.org.uk  Tue May 13 06:20:42 2008
From: mdw at distorted.org.uk (Mark Wooding)
Date: Tue, 13 May 2008 10:20:42 +0000 (UTC)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <87zlqw6v7k.fsf@benfinney.id.au>
Message-ID: <slrng2iqrq.ihm.mdw@metalzone.distorted.org.uk>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>> You can just use a variable name than you ignore. It's traditional
>> to use _ but it's not a special keyword, it's just a another
>> variable name:
>> 
>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>
> It's a terrible name for that purpose, since it doesn't indicate the
> intention explicitly,

There's a lot of tradition behind _ for this purpose, not just in
Python.  For example, pattern-matching function languages, like ML and
Haskell, have been using _ to mean `don't care' for a long time.

Just the fact that the name is repeated suggests that you don't care
about its value.  Besides, it's a good choice for other reasons:
because the symbol is short, the variables you do care about stand out
clearly.

> Far better to use the name 'unused' as suggested by Carl Banks earlier
> today.

Other traditional names are `hunoz', `hukairz' and (apparently) `huaskt.

But these have much more visual clutter than the humble _.  You actually
need to do reading to pick out the bindings which you /are/ interested
in.

-- [mdw]


From gagsl-py2 at yahoo.com.ar  Wed May 14 02:18:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 03:18:00 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk>
	<482a00a2@news.mel.dft.com.au>
	<249560b3-7dd8-4fc1-8c14-11bc98a105ca@c65g2000hsa.googlegroups.com>
Message-ID: <op.ua4rsaowx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 19:31:03 -0300, Mensanator <mensanator at aol.com>  
escribi?:

> Such as what's the voltage at point A?
>
>     +5v
>      |
>     220 ohm
>      |
>      +-- A
>      |
>     330 ohm
>      |
>    ground
>
> Would you be surprised at how many applicants couldn't
> figure that out because they forgot to bring their
> calculator?

<OT>
Just a few hours ago I was helping a high school boy (senior) with some  
chemistry homework. He actually had to use a calculator to evaluate  
120*1/1 (and didn't even noticed he got the "same" number until I told  
him!)
I hope he'll pass his test tomorrow...
</OT>

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Fri May  2 15:45:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:45:11 -0300
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <op.uajk5l1mx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 16:20:04 -0300, Brendan Miller <catphive at catphive.net>  
escribi?:

> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
>
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
>
> Is there a portable /dev/null somewhere in the standard library?

py> import os
py> print os.devnull
nul

(this is on Windows)

-- 
Gabriel Genellina



From spectrumdt at gmail.com  Thu May  8 11:29:33 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Thu, 8 May 2008 08:29:33 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
Message-ID: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>

Hello.

I am running Fedora Linux and KDE, using the Konsole command line.

When coding Python, I regularly make a bug causing my program to not
terminate. But how do I kill the non-terminating Python interpreter
without killing the entire Konsole?

The default way of killing the current process on the command line is
Ctrl+C, but that doesn't work with Python. Neither do the "terminate
task", "suspend task" or "interrupt task" commands (available from
right-click in Konsole).

So, can someone please help? How do I kill Python without having to
restart Konsole?

Thanks in advance.


From vivainio at gmail.com  Sun May 11 15:59:35 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 19:59:35 GMT
Subject: observer pattern  (notification chain synchronization)
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
Message-ID: <87tzh4wr12.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> Here is one way:
>
> - for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
> - as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
> - When it is ok, the fund notifies investors and resets all the
> ``reportreceived`` values.
>
> Is this sensible enough? What are standard and better ways?

You could explore the performance of popping items from the dict/set,
instead of toggling the value so to true. Once the dict is empty, you
are done. Of course the dict/set would be called
stocks_that_havent_reported, or a saner & shorter variant of that.

The idea here is that checking a dict/set for emptiness is
close-to-zero time operation.




From saptarshi.guha at gmail.com  Mon May 19 02:04:57 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Sun, 18 May 2008 23:04:57 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>

I should also mention that for some reason there are several binay
values popping in between for some reason. This behavior (for the
inputr stream) is not expected


> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
>
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
>
> However i get a 1 before all and a 4 just after \n and before the 6.
>
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?
>
> Thanks
> Sapsi



From gneuner2/ at /comcast.net  Fri May  9 17:56:48 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Fri, 09 May 2008 17:56:48 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>

On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
wrote:

>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>> >
>> > I don't think Xah is trolling here (contrary to his/her habit)
>> > but posing an interesting matter of discussion.
>>
>> It might be interesting in the abstract, but any such discussion, when
>> cross-posted to multiple language groups on usenet, will inevitably
>> devolve into a flamewar as proponents of the various languages argue
>> about which language better expresses the ideas being talked about.
>> It's like a law of usenet or something.
>>
>> If Xah wanted an interesting discussion, he could have posted this to
>> one language-neutral group such as comp.programming. He doesn't want
>> that - he wants the multi-group flamefest.
>
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 
>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.

The problem is that many initial posts have topics that are misleading
or simplistic.  Often an interesting discussion can start on some
point the initial poster never considered or meant to raise.

George
--
for email reply remove "/" from address


From piotr_chamera at poczta.onet.pl  Sat May 24 07:01:30 2008
From: piotr_chamera at poczta.onet.pl (Piotr Chamera)
Date: Sat, 24 May 2008 13:01:30 +0200
Subject: Storing objects in relational database
In-Reply-To: <d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
Message-ID: <g18su2$h6c$1@nemesis.news.neostrada.pl>

bruno.desthuilliers at gmail.com pisze:
> I don't know if you'd label it 'elegant', but as far as I'm concerned,
> storing serialized objects as blobs in a relational database is mostly
> non-sense. If I use a relational database, it's because it is a
> *relational* database. If you want an OODB, then we have the ZODB,
> Durus and a couple others.

It is sometimes convenient to store objects in mature relational 
database backend (reliability,  stability, support, tools,
replication, etc.). See latst efforts with RelStorage backend
for ZODB (http://wiki.zope.org/ZODB/RelStorage) - it stores
pickled Python objects in Oracle, PostgreSQL or MySQL)


From gherron at islandtraining.com  Sat May  3 19:44:15 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 03 May 2008 16:44:15 -0700
Subject: is +=1 thread safe
In-Reply-To: <yfswsmbf0gm.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>
Message-ID: <481CF8CF.1020302@islandtraining.com>

Alexander Schmolck wrote:
> AlFire <spamgrinder.trylater at ggmail.com> writes:
>
>   
>>> The threading module already has a function to return the number of Thread
>>> objects currently alive.
>>>       
>> I have threads within threads - so it does not suit me :-(.
>>     
>
> How about using a scalar numpy array? They are mutable, so I assume that x +=
> 1 should be atomic.
>   

No NO NO!   The only way to increment a variable in memory is through a
three step process:

  Load a register from a memory location
  Increment the register
  Store the value back into memory.

Ages ago, there were architectures that would do an increment on a
memory location in an atomic way, but with the current (RISC)
architectures these are three separate operations.

A good compiler may be able to eliminate some of these operations by
keeping the variable in question in a register,  but this just worsens
the problem with respect to threads since each thread has it's own set
of register values.

Gary Herron

> 'as
> --
> http://mail.python.org/mailman/listinfo/python-list
>   




From duncan.booth at invalid.invalid  Wed May  7 08:14:32 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 12:14:32 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
Message-ID: <Xns9A9786AA544CEduncanbooth@127.0.0.1>

Martin Sand Christensen <msc at es.aau.dk> wrote:

>>>>>> "Duncan" == Duncan Booth <duncan.booth at invalid.invalid> writes:
> [...]
> Duncan> Now try:
> Duncan> 
> Duncan>    for command in getCommandsFromUser():
> Duncan>        print "the result of that command was",
> execute(command) Duncan> 
> Duncan> where getCommandsFromUser is a greedy generator that reads
> from stdin, Duncan> and see why generators don't work that way.
> 
> I don't see a problem unless the generator isn't defined where it's
> going to be used. In other similar input bound use cases, such as the
> generator iterating over a query result set in my original post, I see
> even less of a problem. Maybe I'm simply daft and you need to spell it
> out for me. :-)

It does this:

>>> @greedy
def getCommandsFromUser():
	while True:
		yield raw_input('Command?')

		
>>> for cmd in getCommandsFromUser():
	print "that was command", cmd

	
Command?hello
Command?goodbye
that was command hello
Command?wtf
that was command goodbye
Command?

Traceback (most recent call last):
  File "<pyshell#56>", line 1, in <module>
    for cmd in getCommandsFromUser():
  File "<pyshell#42>", line 11, in delayed
    for value in it:
  File "<pyshell#53>", line 4, in getCommandsFromUser
    yield raw_input('Command?')
KeyboardInterrupt


From inhahe at gmail.com  Fri May 16 12:58:07 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:58:07 -0400
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <N1jXj.4900$Kk3.454@bignews9.bellsouth.net>

I'm not sure it's possible to kill a thread in Python that's in the middle 
of a C function.  I know you can't do it with signals, for example.  Or can 
you?  I'm on Windows and signals isn't fully implemented.

I had to do just this, btw, so I wrote another Python program that 
communicates with the main one over a socket and then if it misbehaves I can 
kill it using an OS command because it's a process and there's an OS command 
for killing processes, and then I'd restart it.  The problem is that, 
sometimes the OS kill command would work, sometimes it wouldn't, and I never 
did figure what makes the difference.



"Roger Heathcote" <usenet at technicalbloke.com> wrote in message 
news:DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d at bt.com...
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing of 
> threads is a cardinal sin and although I have no particular threading 
> problem to crack right now I remain interest in the taboo that is thread 
> killing. The real world and it's data are messy and imperfect and I can 
> think of several scenarios where it could be useful to be able to bump off 
> a naughty thread, especially when using/testing unstable 3rd party modules 
> and other code that is an unknown quantity.
>
> With this in mind I am experimenting with a set of threading subclasses 
> that would permit timeouts and the manual killing of threads. I'm trying 
> to evaluate how robust such a scheme can be made and what the limitations 
> would be in practice.
>
> So far I can seemingly murder/timeout pure python threads that are stuck 
> blocking for input and stuck in infinite loops but I'm guessing there are 
> many more awkward cases. What I'm looking for are examples of code/modules 
> that can get stuck in dead ends or might otherwise be problematic to 
> terminate.
>
> In particular I'd be interested to see if I could kill a non-returning c 
> module. Of course naturally no one wants to be publishing buggy modules 
> and the like so I am having trouble finding examples of misbehaving c code 
> to explore further. I figure I could learn how to write c modules for 
> python but, while it's something I'd like to know someday, I'm guessing 
> that will be too long to fit into the immediate future :/ Consequently if 
> anyone has detailed knowledge of what is and isn't fundamentally possible 
> in the world of thread culling, or if you can point me to some 
> gnarly/non-returning thread code to test with I would be forever grateful.
>
> Oh yes, I'm working primarily with 2.5 on XP however I have access to 
> linux & OSX boxen and I'd be interested to learn about problematic thread 
> code for either of those platforms as well.
>
> Thanks for reading,
>
> Roger Heathcote - www.technicalbloke.com 




From kyosohma at gmail.com  Thu May 15 16:11:24 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 15 May 2008 13:11:24 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
Message-ID: <577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>

On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Mike Driscoll wrote:
> > Hi,
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> > shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> > Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to Firefox
> > out, it works too. Is there another method I can use other than
> > creating the shortcut by hand and using the shutil module?
>
> > Thank you for any ideas.
>
> > Mike
>
> Either you copied wrong or the problem is:
>
> "C:\"C:\Program Files...
>
> Note the C:\ is specified twice in the string.  I think it should read:
>
>  > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
>  > \www.myCompanyWebsite.com\auth\preauth.php"
>
> -Larry

Yeah, I know that it's in there twice and that that is the problem.
But I'm not causing that extra C:\. I run it exactly as above and that
is what I get for the output. I think it's the COM object. Maybe I
better just re-post this to the PyWin32 list...

Thanks,

Mike


From bbxx789_05ss at yahoo.com  Sat May 17 14:15:31 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 11:15:31 -0700 (PDT)
Subject: Cookies and CookieJar
References: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>
Message-ID: <9fa71b33-3783-41c0-9897-1785d5bf1ca9@25g2000hsx.googlegroups.com>

Larry Bates wrote:
> I'm struggling with a project using mechanize and cookies to screen scape a
> website.  The site requires a client created cookie for authentication.

Are you sure that is correct?  As far as I know, the usual course of
events is for a site to set a cookie header in the response it sends
back to the client browser, which gets stored on the client's
computer.  Then when the browser makes subsequent requests to that
site, the browser will automatically include the cookies that were set
by that site.


From bbxx789_05ss at yahoo.com  Sun May 11 15:48:11 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:48:11 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <ac2d6ee3-9e82-468f-8f2c-c5d72859896c@b1g2000hsg.googlegroups.com>

bc90021 wrote:
> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>
> where fileName is defined before the line it's used in.  It works fine
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>
> Are threads not allowed to create files?

...oh yeah:

import threading
import time

fname = "data.txt"
f = open(fname)
print f.read()
f.close()

f = open(fname, "a")
f.write("some text\n")
f.close()

f = open(fname)
print f.read()
f.close()


class MyThread(threading.Thread):
    def __init__(self, file_name):
        threading.Thread.__init__(self)

    def run(self):
        time.sleep(3)

        f = open(fname)
        print f.read()
        f.close()

        f = open(fname, "a")
        f.write("other text\n")
        f.close()

        f = open(fname)
        print f.read()
        f.close()


my_t = MyThread(fname)
my_t.start()
my_t.join()


--output:--
hello
world

hello
world
some text

hello
world
some text

hello
world
some text
other text


From levlozhkin at gmail.com  Wed May  7 01:04:58 2008
From: levlozhkin at gmail.com (lev)
Date: Tue, 6 May 2008 22:04:58 -0700 (PDT)
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
	<15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>
	<mailman.569.1209963940.12834.python-list@python.org>
Message-ID: <a4046853-e77a-496e-bbf4-f85766a1413e@v26g2000prm.googlegroups.com>

On May 4, 10:04 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 17:01:15 -0300, lev <levlozh... at gmail.com> escribi?:
>
> >> * Change indentation from 8 spaces to 4
> >     I like using tabs because of the text editor I use, the script at
> > the end is with 4 though.
>
> Can't you configure it to use 4 spaces per indent - and not use "hard" tabs?
>
> >> * Remove useless "pass" and "return" lines
> >     I replaced the return nothing lines with passes, but I like
> > keeping them in case the indentation is ever lost - makes it easy to
> > go back to original indentation
>
> I can't think of a case when only indentation "is lost" - if you have a crash or something, normally you lose much more than indentation... Simple backups or a SCM system like cvs/svn will help. So I don't see the usefulness of those "pass" statements; I think that after some time using Python you'll consider them just garbage, as everyone else.
>
> >> * Temporarily change broken "chdir" line
> >     removed as many instances of chdir as possible (a few useless ones
> > to accomodate the functions - changed functions to not chdir as much),
> > that line seems to work... I made it in case the script is launched
> > with say: 'python somedir\someotherdir\script.py' rather than 'python
> > script.py', because I need it to work in it's own and parent
> > directory.
>
> You can determine the directory where the script resides using
>
> import os
> basedir = os.path.dirname(os.path.abspath(__file__))
>
> This way it doesn't matter how it was launched. But execute the above code as soon as possible (before any chdir)
>
> >     checksums = open(checksums, 'r')
> >     for fline in checksums.readlines():
>
> You can directly iterate over the file:
>
>      for fline in checksums:
>
> (readlines() reads the whole file contents in memory; I guess this is not an issue here, but in other cases it may be an important difference)
> Although it's perfectly valid, I would not reccomend using the same name for two different things (checksums refers to the file name *and* the file itself)
>
> >     changed_files_keys = changed_files.keys()
> >     changed_files_keys.sort()
> >     missing_files.sort()
> >     print '\n'
> >     if len(changed_files) != 0:
> >         print 'File(s) changed:'
> >         for key in changed_files_keys:
>
> You don't have to copy the keys and sort; use the sorted() builtin:
>
>      for key in sorted(changed_files.iterkeys()):
>
> Also, "if len(changed_files) != 0" is usually written as:
>
>      if changed_files:
>
> The same for missing_files.
>
> >         for x in range(len(missing_files)):
> >             print '\t', missing_files[x]
>
> That construct range(len(somelist)) is very rarely used. Either you don't need the index, and write:
>
> for missing_file in missing_files:
>      print '\t', missing_file
>
> Or you want the index too, and write:
>
> for i, missing_file in enumerate(missing_files):
>      print '%2d: %s' % (i, missing_file)
>
> > def calculate_checksum(file_name):
> >     file_to_check = open(file_name, 'rb')
> >     chunk = 8196
>
> Any reason to use such number? 8K is 8192; you could use 8*1024 if you don't remember the value. I usually write 1024*1024 when I want exactly 1M.
>
> --
> Gabriel Genellina

Thank you Gabriel, I did not know about a number of the commands you
posted, the use of 8196 was error on my part. I will change the script
to reflect your corrections later tonight, I have another project I
need to finish/comment/submit for corrections later on, so I will be
using the version of the script that I will come up with tonight.

Thank you for your invaluable advice,
The python community is the first online community that I have had
this much help from, Thank you all.


From bignose+hates-spam at benfinney.id.au  Wed May 28 18:01:55 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 29 May 2008 08:01:55 +1000
Subject: Traling white space on program source lines (was: Simple Doc Test
	failing without any reason [Help Needed])
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
	<6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>
	<6117786a-ae42-493f-8120-be16233b2980@l17g2000pri.googlegroups.com>
Message-ID: <87mymarsto.fsf_-_@benfinney.id.au>

afrobeard <afrobeard at gmail.com> writes:

> >>> sanitize_number('0321-4683113')<There were some spaces in these angle brackets>
> 
> Apparently they caused the test case to fail on this.
> 
> Weird behavior :/

Nope, exactly as specified: doctest is reporting differences berween
what output was generated and what output you described.

> Thanks for your time Gerard and thanks to everyone else too.

Moral of the story: Configure your editor to highlight trailing space
on a line as an error, and always remove it before saving a program
source code file.

-- 
 \       ?Men never do evil so completely and cheerfully as when they |
  `\                 do it from religious conviction.? ?Blaise Pascal |
_o__)                                     (1623-1662), Pens?es, #894. |
Ben Finney


From brian at sweetapp.com  Thu May 22 18:19:35 2008
From: brian at sweetapp.com (Brian Quinlan)
Date: Thu, 22 May 2008 23:19:35 +0100
Subject: Python and Flaming Thunder
In-Reply-To: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <4835F177.9090905@sweetapp.com>

Dave Parker wrote:
>> Or just:
>>
>> If command is "quit" ...
> 
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
> 
>      Read data from "input.txt".
>      If data is an error then go to ...

Hey Dave,

Does this mean that Flaming Thunder requires explicit checking rather 
than offering exceptions?

Cheers,
Brian


From daveparker at flamingthunder.com  Wed May 28 09:26:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 06:26:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <01a1457d-4734-4a6b-8fb8-816a54e4d770@p39g2000prm.googlegroups.com>

> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...

I enjoyed the discussion of how different languages handle the notion
of "="; I learned something new.  Thanks.

On May 22, 9:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > ?But after getting input from children and teachers, etc, it started
> > ?feeling right.
>
> > ?For example, consider the two statements:
>
> > ? ? ? x = 8
> > ? ? ? x = 10
>
> > ?The reaction from most math teachers (and kids) was "one of those is
> > ?wrong because x can't equal 2 different things at the same time".
>
> This is a common feature in functional languages...
>
> Eg
>
> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> [async-threads:0] [kernel-poll:false]
>
> Eshell V5.6.2 ?(abort with ^G)
> 1> X = 8.
> 8
> 2> X = 10.
> ** exception error: no match of right hand side value 10
> 3>
>
> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick



From spoier at gmail.com  Tue May 20 15:58:49 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 12:58:49 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
	<d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
Message-ID: <8fb9d8a3-caac-45af-92ff-4540dc14f596@v26g2000prm.googlegroups.com>

Nevermind, I seem to have found it on my own =]

http://python.org/doc/2.5/lib/module-struct.html

This module performs conversions between Python values and C structs
represented as Python strings. It uses format strings (explained
below) as compact descriptions of the lay-out of the C structs and the
intended conversion to/from Python values. This can be used in
handling binary data stored in files or from network connections,
among other sources.

I freakin' love Python!!

Skye



From torriem at gmail.com  Mon May 19 20:14:12 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 19 May 2008 18:14:12 -0600
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <4831DDCA.2050005@gmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>	<d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
	<4831DDCA.2050005@gmail.com>
Message-ID: <483217D4.8010303@gmail.com>

Michael Torrie wrote:
> And of course Python is perfect in this area.  A great example is found
> here:

ahem, http://www.dabeaz.com/generators/Generators.pdf


From darcy at druid.net  Fri May  2 09:21:27 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 09:21:27 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87ve1xz23l.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87ve1xz23l.fsf@benfinney.id.au>
Message-ID: <20080502092127.fa308411.darcy@druid.net>

On Fri, 02 May 2008 15:50:22 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > You have lived a sheltered life.  Not every packaging system puts the
> > executible in /usr/bin.  Many systems use /usr/local/bin.
> 
> They use that for the operating-system-installed default Python
> interpreter? Colour me incredulous.

OK, let me get out my crayons.  However, note that I did not say
"operating-system-installed."  I said a packaging system puts it
there.  In fact, the NetBSD packaging system works on many systems
including Linux and thus is not an operating system packager.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From martindesalinas at gmail.com  Fri May 16 04:22:01 2008
From: martindesalinas at gmail.com (martindesalinas at gmail.com)
Date: Fri, 16 May 2008 01:22:01 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com> 
	<482c4934$0$6041$426a74cc@news.free.fr>
Message-ID: <60e2ee6e-955a-49f2-a87a-ad8c3908d2c8@l42g2000hsc.googlegroups.com>

look at module re (rgular expression) or pyparser

see http://nedbatchelder.com/text/python-parsers.html



From a.harrowell at gmail.com  Thu May 29 09:09:06 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 06:09:06 -0700 (PDT)
Subject: Strange thing with types
Message-ID: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>

I'm doing some data normalisation, which involves data from a Web site
being extracted with BeautifulSoup, cleaned up with a regex, then
having the current year as returned by time()'s tm_year attribute
inserted, before the data is concatenated with string.join() and fed
to time.strptime().

Here's some code:
timeinput = re.split('[\s:-]', rawtime)
print timeinput #trace statement
print year #trace statement
t = timeinput.insert(2, year)
print t #trace statement
t1 = string.join(t, '')
timeobject = time.strptime(t1, "%d %b %Y %H %M")

year is a Unicode string; so is the data in rawtime (BeautifulSoup
gives you Unicode, dammit). And here's the output:

[u'29', u'May', u'01', u'00'] (OK, so the regex is working)
2008 (OK, so the year is a year)
None (...but what's this?)
Traceback (most recent call last):
  File "bothv2.py", line 71, in <module>
    t1 = string.join(t, '')
  File "/usr/lib/python2.5/string.py", line 316, in join
    return sep.join(words)
TypeError


From bignose+hates-spam at benfinney.id.au  Wed May 14 18:01:42 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 08:01:42 +1000
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
Message-ID: <873aokzgs9.fsf@benfinney.id.au>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 18:20, castiro... at gmail.com wrote:
> > I'm concerned over the future of Python.  Should tuples be named?
> 
> Obviously not, unless they should.

Clearly they should, unless not.

-- 
 \               ?It is seldom that liberty of any kind is lost all at |
  `\                                                once.? ?David Hume |
_o__)                                                                  |
Ben Finney


From jon+usenet at unequivocal.co.uk  Thu May  1 15:13:08 2008
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: Thu, 01 May 2008 14:13:08 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
Message-ID: <slrng1k5i4.rtj.jon+usenet@snowy.squish.net>

On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> I used XML files before for this purpose and found YAML much easier and 
> better suitable for the task.
>
> Please explain why don't like YANL so much?

Because even the examples in the spec itself are unreadable gibberish.
The PyYAML library is over 300kB! These are rather big clues that it's
unsuitable for the purpose for which it was designed. It's certainly
unsuitable for use as a configuration file format, where it is
overkill by several orders of magnitude.

  !!str &a1 "foo":
  !!str bar
  &a2 baz : *a1
  !<tag:yaml.org,2002:str> foo :
  !<!bar> baz

This is supposed to be human readable?

> PS. Your reply remind me of early days of Python when Perl programmers 
> said exacly the same thing about Python.

I think I would suffer irony overload if I saw a Perl programmer
criticising Python for being hard to read ;-)


From collinyeung at shaw.ca  Tue May 13 21:02:36 2008
From: collinyeung at shaw.ca (Collin)
Date: Wed, 14 May 2008 01:02:36 GMT
Subject: Accepting text input
In-Reply-To: <mailman.960.1210570776.12834.python-list@python.org>
References: <72QVj.262833$pM4.115744@pd7urf1no>	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
Message-ID: <MSqWj.266252$pM4.8985@pd7urf1no>

Gabriel Genellina wrote:
> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> escribi?:
> 
>> Collin wrote:
>>> I'm pretty new to Python, but this has really bugged me. I can't find a
>>> way around it.
>>>
>>>
>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>
>>> Any help would be appreciated. Thanks.
>>
>> Oh, wow. I feel so stupid. Please disregard this message. <_<
> 
> No need to apologize...
> 
>> I read the error message just now a bit more carefully, and I tried
>> something. I tried defining "yes" as some random numerical value. Then
>> when I did:
>> (example code)
>>
>> yes = 123123983 #some number
>> test = input("Test test test ")
>> if test == yes:
>> 	print "It worked."
>> else:
>> 	print "failed"
>>
>> (example code off)
> 
> The usual way for Python<3.0 is:
> 
> answer = raw_input("Test test test ").lower()
> if answer == "yes":
>      ...
> 
> The input() function evaluates user input as an expression: if he types 2+5 the input() function returns the integer 7. I would never use input() in a program - it's way too unsafe; use always raw_input instead.
> 

If I use it like that, do I have to import anything to have the .lower() 
work? And if I do, what does the .lower() signify?


From bignose+hates-spam at benfinney.id.au  Sat May 24 21:04:26 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:04:26 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <87ve139oth.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> Problem 1: You can only code against tests
> 
> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing
> the code you will also think of a lot of corner cases you should
> also handle. The natural way to do this is to add them to the code
> first.

In Behaviour Driven Development, that's not the natural way, since you
don't add code unless a test requires you to add it.

Very often, by designing the code to the point where you write an
automated test for it, you find You Aren't Gonna Need It
<URL:http://c2.com/cgi/wiki?YouArentGonnaNeedIt> for many of the
corner cases you envisaged, so you *save* time by thinking about the
code design first.

> But with TDD you have to first write a test for the corner case,
> even if setting up test code for it is very complicated.

For this, unit test frameworks have "fixtures": a common test
environment that will be set up before each test case that is defined
to need that fixture, and torn down after the test runs (whether the
test result is pass, fail, or error).

In Python's 'unittest', this is done by grouping related test cases
together into methods of a TestCase class, and defining fixtures that
will be present for every test case in that class.

> So, you have these options:
> 
> - Take as much time as needed to put a complicated test case in
> place.

Which is a motivator to make the interfaces less complicated, *before*
implementing them, so the code becomes easier to test.

> - Don't add corner case to your code because you can't (don't have
> time to) write a test for it.

That's a false economy.

If you don't have the time to write a test for it, that's the same
thing as saying you don't have the time to know whether you've done
the implementation right.

You pay for it later, with *much* interest, in time spent hunting down
bugs caused by that code, when you could have had an automated test
simply tell you the breakage and its location as soon as it happened.
That's time that you spend before even getting to the point of fixing
the bug. Thus, writing tests first *saves* time, by not having to hunt
those bugs that could be found by automated tests at all.

> - Add the corner case handling to the code first, and try to add a
> test later if you have time for it.

A recipe for disaster: now you have code which isn't there to satisfy
a test, and since you say it's for a corner case, it's likely not
exercised by the test suite at all. Take everything said above about
debugging time and multiply it.

> Problem 2: Slows down prototyping
> 
> In order to get a new system working, it's nice to be able to throw
> together a set of modules quickly, and if that doesn't work, scrap
> it and try something else. There's a rule (forget where) that your
> first system will always be a prototype, regardless of intent.

Fred Brooks gave that law. "Plan to throw one away; you will, anyhow."

The same rule also implies that throwing it away is worthwhile because
the main value of the first version is not in the code itself, but in
what it *taught* you about how to make the second version.

> With TDD, you have to first write the tests for the first version.
> Then when that first version doesn't work out, you end up scrapping
> the tests and the code. The time spent writing the tests was wasted.

I find that, with a good unit test suite in place, the first version
can much more easily *evolve* into the second version: the first
version gets thrown away, but in pieces over a short time, instead of
a whole lump.

Complete coverage by unit tests makes bold changes to the code far
less risky, so as enlightenment dawns about how crappy the original
design was, altering the existing system is much more natural.

> Having to write tests for all code takes time.

Yes. That's time you'll have to spend anyway, if you want your code
tested. Whether you write the tests, early or late, they'll still take
time to write. But writing them *while* you develop the code means you
actually *do* write them, instead of putting them off to the point
where they never get written.

also, since with Behaviour Driven Development you're writing tests at
the point where you implement the code, you are writing *only* tests
that are needed to assert behaviour for the code you're about to
write. This results in countless wrong paths not being taken as a
result of smaller feedback cycles, so you save time in all the
unnecessary tests you *don't* write.

If you don't want your code to have complete automated unit test
suites, I don't want to be your customer.

> Instead of eg: 10 hours coding and say 1/2 an hour manual testing,
> you spend eg: 2-3 hours writing all the tests, and 10 on the code.

This is a false economy. If all you do is 2-3 hours of manual testing,
are you then prepared to say the code works for *all* requirements
with a high degree of confidence?

As I'm sure you'll agree, automated, complete-coverage testing for all
code paths is far superior confidence to 2-3 hours of manual testing.

> Problem 4: Can make refactoring difficult.

Your explanation for this below is only that it takes time, not that
it's difficult to do.

> If you have very complete & detailed tests for your project, but one
> day you need to change the logic fundamentally (maybe change it from
> single-threaded to multi-threaded, or from running on 1 server to
> distributed), then you need to do a large amount of test refactoring
> also.

Again, this is not a problem with the *way* the tests are written, nor
*when* they're written, but the fact that they're there at all.

> The more tests you have (usually a good thing), the longer it will
> take to update all the tests, write new ones, etc. It's worse if you
> have to do all this first before you can start updating the code.

Who says you have to do all the changes to all the tests before
changing any of the code? That would be spectacularly bad practice.

Behaviour Driven Development says that you address *one* change in
behaviour at a time, so that you know which failing tests to address.
This makes the work much more manageable, since it localises the
changes to both the tests and the application.

> You need to justify the extra time spent on writing test code.

>From the perspective of someone who once thought this way, and then
dug in and did Behaviour Driven Development, I can tell you the time
is entirely justified: by better design, more maintainable code,
higher confidence when speaking to customers, high visibility of
progress toward completion, freedom to refactor code when it needs it,
and many other benefits.

> Tests are nice, and good to have for code maintainability, but they
> aren't an essential feature (unless you're writing critical software
> for life support, etc).

Whether your customers express it at the time they specify the system,
they want as much testing as you can fit in. Whom do you think they
will blame when the application breaks?

If their specified requirements explicitly describe some behaviour,
but you don't have automated tests to tell you whether or not the
application actually behaves that way, and the application breaks when
they try it after paying you to implement it, what possible excuse do
you think the customers will accept?

> Clients, deadlines, etc require actual software, not tests for
> software (that couldn't be completed on time because you spent too
> much time writing tests first ;-)).

Clients also require meaningful feedback on progress toward the goal.

Without a complete-coverage unit test suite, you have a completely
unknown amount of debugging time looming that grows the longer the
project continues. Any figure of completion that you give to the
customer will be wildly inaccurate because of this unknown factor, and
it will bits when you get to the point of "90% feature complete", but
the project blows out hugely because completing that last 10% involves
masses of debugging time.

You've no doubt heard the old saw about software project development:
90% of the implementation consumes 90% of the schedule. The last 10%
consumes another 90% of the schedule."

With an automated unit test suite that has complete coverage of the
code at all stages of implementation, you can be much more confident
that the features *are* complete as specified, because the
specifications are codified as unit tests, and the unit tests pass.
You're checking items off a meaningful list, rather than coding and
praying that you got it right.

> I think that automated tests can be very valuable for
> maintainability, making sure that you or other devs don't break
> something down the line. But these benefits must be worth the time
> (and general inconvenience) spent on adding/maintaining the tests.

I encourage you to try it. Learn your unit test suite (Python's
'unittest' and 'doctest' modules are fine), learn how to easily run it
automatically (the third-party 'nose' package is great for this), and
follow Behaviour Driven Development on one small aspect of your code;
perhaps a single module.

> If I did start doing some kind of TDD, it would be more of the
> 'smoke test' variety. Call all of the functions with various
> parameters, test some common scenarios, all the 'low hanging fruit'.
> But don't spend a lot of time trying to test all possible scenarios
> and corner cases, 100% coverage, etc, unless I have enough time for
> it.

This was my point of view too. Then I discovered that the code I was
writing under Behaviour Driven Development involved far fewer
dead-ends, far better designs, and far more constant forward progress
? all as a result of the fact that I had to design the code well
enough to write tests for it, *before* actually implementing that
code.

> I'm going to read more on the subject (thanks to Ben for the link).
> Maybe I have some misconceptions.

If so, you're certainly not alone.

Happy hacking!

-- 
 \              ?You can be a victor without having victims.? ?Harriet |
  `\                                                             Woods |
_o__)                                                                  |
Ben Finney


From inhahe at gmail.com  Wed May 21 02:22:03 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 02:22:03 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
	<0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>
	<XkMYj.13011$Xv3.1374@bignews4.bellsouth.net>
Message-ID: <LbPYj.13080$Xv3.11228@bignews4.bellsouth.net>

>
> i don't know how i would get around the problem, though, because i'd have 
> to know how to access the deque object that my class stores when i do 
> deque.__init__ in my constructor, so that i could pickle it and my class 
> variables separately.
>
>

i decided i could just pickle deque(self), which should return a regular 
deque object with the data from self, and then in the load routine make a 
pdeque object from it.

that, of couse, gives me another error.  'collections.deque' object has no 
attribute 'write'.  from the line 'self.write = file.write', which is in 
pickle.py
pickling list(self) doesnt work either.







From roy at panix.com  Sat May 24 11:01:48 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 11:01:48 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <roy-78E3A6.11014824052008@70-1-84-166.area1.spcsdns.net>

In article 
<5ea78616-e955-4ee0-8e60-a22734ec31be at 79g2000hsk.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.

I hear what you're saying, friend, and I feel your pain!  Life gets so much 
more complicated when you've got paying customers.  It's especially 
complicated when your customers have a market cap an order of magnitude 
greater than your own :-)


From yves at zioup.com  Sun May 11 23:42:03 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 03:42:03 GMT
Subject: anonymous assignment
In-Reply-To: <mailman.956.1210562648.12834.python-list@python.org>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
Message-ID: <f0PVj.262779$pM4.237055@pd7urf1no>

D'Arcy J.M. Cain wrote:
> On Mon, 12 May 2008 02:28:13 GMT
> Yves Dorfsman <yves at zioup.com> wrote:
>> particular case, there's got to be a better way than:
>>
>> d = time.local()
>> y = d[0]
>> d = d[1]
> 
> Like this?
> 
>     y, d = time.local()[:2]

Sorry this was a typo (again :-), I meant:

d = time.local()
   y = d[0]
   d = d[2]

Yves.
http://www.SollerS.ca


From deets at nospam.web.de  Tue May 27 05:47:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 11:47:07 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>
	<1997713b-6fc0-497b-ae66-e90626b6645a@m73g2000hsh.googlegroups.com>
Message-ID: <6a23lqF32p1e5U1@mid.uni-berlin.de>

Alex Gusarov wrote:

>>    class MyPaintCell(PaintCell):
>>       def paintcell(self):
>>           PaintCell.paintcell(self)
>>           myPaintCell(self)
>>
>>    (hmm, only 4 lines, I overestimated the cost. Sorry)
> 
> Yeah, that's funny..
> 
> I don't want to do it 'cause I create my form within Designer and
> simply drop Calendar widget to it. Then I need to translate it
> into .py file, it's OK. But if I want to use a custom derived from
> Calendar class instead of it, I need after every refreshing/
> translating of form replace few lines in translated file.
> 
> I just want to know about existence of other method to do this in
> class, that contain instance of Calendar.
> 
> By "this" I mean:
> Instead of calling original method "paintcell" alone, call it with my
> custom metod.

You should ask this on the PyQt-mailing-list. And you can try and experiment
with the module new & the function instancemethod in there.

Diez


From jason.scheirer at gmail.com  Mon May 19 19:05:15 2008
From: jason.scheirer at gmail.com (Jason Scheirer)
Date: Mon, 19 May 2008 16:05:15 -0700 (PDT)
Subject: Serious Problem with Timezone
References: <95b65707-35d1-4ce7-9138-b89c44d8084a@w7g2000hsa.googlegroups.com>
Message-ID: <6f9c7cee-5b6a-41e1-8752-a145c84eb872@w34g2000prm.googlegroups.com>

On May 19, 3:02?pm, T-u-N-i-X <alperka... at gmail.com> wrote:
> Hey There,
>
> I'm a django developer and working on a project right now.. Last week
> I just discovered a new problem in Python.. Here's what I do..
>
> [01:00] (tunix at penguix ~)$ date
> Sal May 20 01:00:10 EEST 2008
> [01:00] (tunix at penguix ~)$ python
> Python 2.5.2 (r252:60911, Feb 23 2008, 21:20:32)
> [GCC 4.2.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> from datetime import datetime
> >>> datetime.now()
>
> datetime.datetime(2008, 5, 20, 1, 0, 21, 131804)>>> import os
> >>> os.environ["TZ"] = "Europe/Istanbul"
> >>> datetime.now()
>
> datetime.datetime(2008, 5, 19, 22, 0, 38, 578438)
>
>
>
> It's 01:00 in Istanbul now and Python shows 22:00 on 19th of May if I
> set the TZ environment variable.. Django sets that variable
> automatically so I'm having problems with scheduled posts..
>
> I controlled my system's BIOS time.. It was wrong before, so I just
> corrected it.. I set the time to UTC on Linux.. What else can I do ?

You may want to investigate the datetime.astimezone() method, as well
as getting comfortable with using tzinfo objects. Check out
http://pypi.python.org/pypi/pytz/ for a module that can give you the
tz objects you want. Also useful is datetime.utcnow()* and
datetime.replace(tzinfo=other_tzinfo), which will give you that same
time but not 'smartly' try to adjust the components in the datetime
object.

I've found datetime.utcnow() is a little temperamental (bad tzinfo is
assigned by default, making it impossible to do conversions) and you
still need to do datetime.utcnow().replace(tzinfo=utctz) to get it to
behave well.


From castironpi at gmail.com  Sat May 17 20:05:30 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 17:05:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <8f963d30-76f6-4ef8-998d-b848c83a74c8@x41g2000hsb.googlegroups.com>

On May 17, 5:32?pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
>
> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
>
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

You're hearing from 'impossible and useless'-- neither operations.

'Stacks' are pretty important to Python (there is a Stackless Python,
I understand), which makes persistence a little more handy.  It's
still a computer and still a language.  You may be asking how well its
best speakers know, and look at that, I can't tell you.  Some of the
fundamentals of Python may be unexplored to date, as its from the 90s,
and stacks are elements.

I, for one, will assume you're interested in control operations, which
yes Python has, and control is important.  The standard library is a
good size to me (I wouldn't go doubling).  There's a ready graphics
module.  There are code-primitive literals, including lists -and- a
tuple.  I think you're looking for the selling points of dynamic
assignment (a.barproperty= 'unheardof'), typefreeness (a= [2,'bcd']),
dynamic execution (exec('print 2'), which promotes a possibility of
self-referentiality), type-aware function pointers, variable-length
procedure arguments, and platform independence.

I think you just asked at the right time.  Yes that's an impressive
list.

There is one catch to Python, of the importance of which of the powers
that be, I am unaware.  But I do know what you are liable to find on
the newsgroup.  Now, with thousands of dollars of institution time on
the money, what control?  I will be tentatively assuming that you are
not covertly comparing other languages.  I don't think you'll like it
if you're unwise.


From castironpi at gmail.com  Fri May 16 09:56:12 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:56:12 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
Message-ID: <e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com>

On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > ?? wrote:
> > >     I wonder why below does not work.
>
> > > a = object()
> > > a.b = 1        # dynamic bind attribute failed...
>
> > The implementation of slots depends on that behaviour:
>
> >http://docs.python.org/ref/slots.html
>
> > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > Can you expand on that?
>
> > Peter
>
> Spirals are important.

I'd be modeling streams, in par. crossing them.


From szhorvat at gmail.com  Mon May  5 03:31:14 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Mon, 05 May 2008 09:31:14 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <Xns9A94ACAB89668duncanbooth@127.0.0.1>
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
Message-ID: <481EB7C2.1040400@gmail.com>

Duncan Booth wrote:
> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
> 
>> I thought that it would be very nice if the built-in sum() function used 
>> this algorithm by default.  Has this been brought up before?  Would this 
>> have any disadvantages (apart from a slight performance impact, but 
>> Python is a high-level language anyway ...)?
> 
> There's a thread you might find interesting:
> 
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a
> 
> In that thread I suggested that Python ought to implement sum by adding 
> together each pair of values, then each pair of results and so on. This 
> means that for input values of a similar magnitude the intermediate results 
> stay balanced. The implementation doesn't actually do all the first level 
> sums first, it builds up a stack containing the sum of 2^k, 2^(k-1)...2 
> values. Also it works for other types as well, and for strings or lists has 
> the advantage of minimising the number of large string or list concatenations.
> 
> If you follow that thread far enough you'll find a post by Jussi Salmela 
> which shows that summing adjacent pairs performs as well as Kahan summation
> (he says 'almost as good' but in fact the only time they get different 
> results the 'correct' answer is 500000.000005 and Kahan and sumpairs get 
> the two nearest representable results either side: 500000.00000499998 and 
> 500000.00000500004 respectively).
> 
> I never did get round to re-coding my sumpairs() function in C, I would be 
> interested to see just how much overhead it introduces (and I suspect it
> would be faster than the existing sum in some cases such as for lists).

Thanks for this link!  Though some of the thread is missing, it was an 
interesting read.

This sounds like a very good idea: it is more generally applicable than 
the Kahan summation because it does not require subtraction/negation, so 
it would work with user-defined types, too.

While now I am convinced that using Kahan summation by default is not 
such a good idea, I cannot see any serious disadvantages/problems with 
pairwise summation!


From upton at virginia.edu  Fri May 16 13:44:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 13:44:32 -0400
Subject: writing python extensions in assembly
In-Reply-To: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <5504f9ac0805161044r7756045cvec72cbc5f8a2f175@mail.gmail.com>

>> 3.  If it is still slow, embed some assembler where it is slowing down.
>>
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.
> Although it's true I'd only have to embed it for one system to see (more or
> less).
>

Regardless of whether it's faster, I thought you indicated that really
it's most important that it's fast enough.

That said, it's not true that you won't know if it's faster until you
embed it--that's what unit testing would be for.  Write your loop(s)
in Python, C, ASM, <insert language here> and run them, on actual
inputs (or synthetic, if necessary, I suppose).  That's how you'll be
able to tell whether it's even worth the effort to get the assembly
callable from Python.

On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>
> Why wouldn't the compilers support it? It's part of the x86
> architexture,
> isn't it?

Yeah, but I don't know if it uses it by default, and my guess is it
depends on how the compiler back end goes about optimizing the code
for whether it will see data access/computation patterns amenable to
SIMD.


From mabbikeel at gmail.com  Tue May  6 15:29:48 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Tue, 06 May 2008 20:29:48 +0100
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
Message-ID: <op.uaqy3yuy4fd8pl@mp1206-hp.config>

On Tue, 06 May 2008 20:02:21 +0100, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:

> vivainio at gmail.com (Ville M. Vainio) writes:
> vivainio at gmail.com (Ville M. Vainio) writes:
>> I don't think BSD/MIT like license really annoys anyone. Think python
>> here ;-)
>
> Python's non-GPL license certainly is annoying to some of us.

I'm intrigued - how can it be annoying?

> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/



From inhahe at gmail.com  Thu May 22 19:02:24 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 19:02:24 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
Message-ID: <gXmZj.61595$3v1.19703@bignews3.bellsouth.net>

actually i ddin't think about the fact that you're overloading dict, which 
can already take multiple values in getitem

so how about

class crazy: pass

and then in your dict class:

def __getitem__(*args):
  if args[-1] is crazy:
    return self.get(args[:-1])*5
  else:
    return self.get(args)

and then
print foo[1,2] #not crazy
print foo[1,2,crazy] #crazy

I *think* that would work




"Andreas Matthias" <amat at kabsi.at> wrote in message 
news:uf6hg5-ca9.ln1 at buckbeak.hogwarts...
> The following code doesn't run but I hope you get what I
> am trying to do.
>
>
> class my_dict (dict):
>
>    def __getitem__ (self, key, crazy = False):
>        if crazy == True:
>            return 5 * self.get(key)
>        else:
>            return self.get(key)
>
>
> foo = my_dict()
> foo['a'] = 123
>
> print foo['a']
> print foo['a', crazy = True]
>
>
> Is it somehow possible to overload __getitem__ with an additional
> argument? Are there other possibilities to achiev this? Or is
> the only solution to this to write a normal function call
> `def my_get (self, key, crazy=False)'?
>
>
> Ciao
> Andreas 




From nick at craig-wood.com  Sat May  3 09:30:04 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 08:30:04 -0500
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org>
Message-ID: <slrng1ooto.avc.nick@irishsea.home.craig-wood.com>

Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>  I've gone through the list of "language differences" between 2.3 / 2.4
>  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
>  CPython, and I consider myself still very very newbie. So, unable to
>  take a call as to how-important or desirable the newer language
>  features are -- so whether to write my app for v2.5 of Python, versus,
>  as few others on this list have recommended, i.e. to stick to v2.3 ??
>  Are the preformance improvements, and memory footprint / leak fix in
>  2.5 enough to justify moving to it ? What all do I stand to lose (or
>  gain) by writing on v2.3 ??

If you are writing for 2.3 you are writing for 2.4 and 2.5 also.

There are some nice things in 2.4 and 2.5 but nothing you really need
IMHO.  So I'd say writing in a 2.3 subset would be perfectly sensible.

>  I've a constraint due to which I might have to also write parts of my
>  app (client side) in Jython (because I want to eventually ship Java --
>  yet benefit from the rapid development and clarity of Python). Would
>  sticking to v2.3 in such a case be a better idea ? Suggestions with
>  reasoning would be very helpful.

Jython seems to be based off python 2.2 so you would be limited to 2.2
features in that case.  No big deal in my opinion.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From hdante at gmail.com  Tue May 13 13:06:48 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 10:06:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>

On May 13, 12:24?pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -
>
>

 Notice that I said "free software", not "*** FREE *** software !!!!
1!" (that is, free as in freedom, not free as in beer). Read again my
answer, considering this.


From george.sakkis at gmail.com  Fri May  9 20:53:19 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 17:53:19 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
Message-ID: <494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com>

On May 9, 5:19?pm, umpsu... at gmail.com wrote:
> > > What would be the best method to print the top results, the one's that
> > > had the highest amount of anagrams?? ?Create a new histogram dict?
>
> > You can use the max() function to find the biggest list of anagrams:
>
> > top_results = max(anagrams.itervalues(), key=len)
>
> > --
> > Arnaud
>
> That is the biggest list of anagrams, what if I wanted the 3 biggest
> lists? ?Is there a way to specific top three w/ a max command??

>>> import heapq
>>> help(heapq.nlargest)
Help on function nlargest in module heapq:

nlargest(n, iterable, key=None)
    Find the n largest elements in a dataset.

    Equivalent to:  sorted(iterable, key=key, reverse=True)[:n]


HTH,
George


From skanemupp at yahoo.se  Tue May 13 21:40:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 18:40:36 -0700 (PDT)
Subject: 2004 example, passing function error
Message-ID: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>

http://linuxgazette.net/109/pramode.html

>>>
>>>def sqr(x): return x*x
...
>>>def cube(x): return x*x*x
...
>>>sqr
<function sqr at 0x402ba10c>
>>>a = [sqr, cube]
>>>a[0](2)
>>>def compose(f, g): return f(g(x))
...
>>>compose(sqr, cube, 2)
64
>>>


but i get:

>>> compose(sqr, cube, 2)

Traceback (most recent call last):
  File "<pyshell#56>", line 1, in <module>
    compose(sqr, cube, 2)
TypeError: compose() takes exactly 2 arguments (3 given)


this:

>>> def compose(f, g, x): return f(g(x))
>>> compose(sqr, cube, 2)
64

works though
. so just a mistake on his part? but it looks like he just copied his
shell...has there been a change since 2004 inr egards to how you can
pass functions as arguments to functions??


From daveparker at flamingthunder.com  Tue May 13 09:14:34 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:14:34 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
	<0001HW.C44D0ADD008F9F39F0284530@news.verizon.net> 
	<JJGdnSTlDrzfLLrVnZ2dnUVZ_r_inZ2d@earthlink.com>
Message-ID: <adaeaf47-3885-45be-a568-1ef57bfdc18f@z16g2000prn.googlegroups.com>

>         REXX's loop construct subsumes all the common uses... And worse, it
> appears that a repetition and a condition can be part of the single
> statement.

Thank you for pointing out the REXX examples.  I am a Kedit user, but
had forgotten about the REXX do-loops.  I'll keep them in mind when I
add an easy way to "do this n times" to Flaming Thunder this weekend.

On May 11, 8:53?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 12 May 2008 00:43:08 GMT, Jonathsn Cronin <j... at theworld.com>
> declaimed the following in comp.lang.python:
>
> > I agree in principle; the first is iteration and the second is repetition.
> > In Python, the common idiom for a fixed number of repetitions is iterating
> > over a number range. ?This is true in most languages I am familiar with,
> > probably because fixed repetition, where you don't care about the "index"
> > value, is rarely used.
>
> > The only language I've used that does have fixed repetition is an (old)
> > dialect of lisp, and I'm not sure it even made it into Common Lisp. ?
> > Smalltalk and Ruby do have fixed repetition.
>
> ? ? ? ? REXX's loop construct subsumes all the common uses... And worse, it
> appears that a repetition and a condition can be part of the single
> statement.
>
> DO FOREVER
> ...
> END
>
> DO repeatcount
> ...
> END
>
> DO loopvar=first TO last BY step FOR reptcount
> ...
> END
>
> (where "TO last", "BY step", "FOR reptcount" are all optional clauses!)
>
> DO WHILE conditional
> ...
> END
>
> DO UNTIL conditional
> ...
> END
>
> ? ? ? ? Mixing modes
>
> DO loopvar=first BY step UNTIL conditional
> ...
> END
>
> Hmmm, looks like it's been extended for container objects (those that
> support MAKEARRAY):
>
> DO item OVER container
> ...
> END
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/



From bruno.desthuilliers at gmail.com  Fri May 23 17:00:33 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 14:00:33 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr> 
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
Message-ID: <89be7f59-4c08-4739-ab07-d310e0c6aef3@2g2000hsn.googlegroups.com>

On 23 mai, 10:42, "inhahe" <inh... at gmail.com> wrote:
> "Bruno Desthuilliers" <bruno.42.desthuilli... at websiteburo.invalid> wrote in
> messagenews:4836772e$0$6097$426a74cc at news.free.fr...
>
> > Brad a ?crit :
> >> cm_gui wrote:
> >>> Python is slow.
>
> >> It ain't C++, but it ain't a punch card either... somewhere in between. I
> >> find it suitable for lots of stuff. I use C++ when performance really
> >> matters tho... right tool for the job. Learn a good interpreted language
> >> (Pyhton) and a good compiled language (C or C++)
>
> > LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> > 1/ being interpreted or compiled (for whatever definition of these
> > terms) is not a property of a language, but a property of an
> > implementation of a language.
>
> That's like saying being spherical is not a property of planets, it's a
> property of an instanciation of a planet.

I do definitively not have the required knowledge to say anything
about "being spherical" being part of the definition of what a
"planet" is or not.

>, and b) It's a far cry to
> imagine a planet coming into being that's not spherical

Idem

>  (a language as
> dynamic as Python, or most other scripting languages, would be either
> extremely difficult or impossible to make a native compiler for).

Now this I can tell is false. The problem is not that it's difficult
to "make a native compiler for" dynamic languages, the problem is that
it's difficult to write native compiler for dynamic languages that
generates code that beats the VM/byte-code interpreter/whatever you
name it to be wotrh the effort.

> I guess I
> should also mention that Python isn't very practical (as in "suitable",
> "right tool for the job", and "perfomance", as mentioned in the above post)
> without an implementation.

That is debatable. There are algorithm courses taught in "pseudo-code"
- that is, a language that doesn't have any known implementation.

> So I don't think this distinction has any use
> other than to beat other people over the head with a bat.

Ok, *you* know this - I mean, the distinction between a language and a
language's implementation(s).  Are you sure everyone saying - or
reading - assertions such as "language XXX is slow" or "compiled
languages are faster" etc really know what they're talking about ?

> > 2/ actually, all known Python implementations compile to byte-code.
>
> Which is then interpreted, but you're still technically right, because
> "compiled" can mean either compiled to bytecode or compiled to native code,
> despite what it actually did mean.  Semantics FTW!!

Yes, semantics. But a bit more than semantics - byte-code interpreters
are usually way faster than "pure" interpreter, and start to be fast
enough for quite a lot of practical use.

Ok, I'll stop on this - once again, sorry for the noise, and please
bear with me, I tend to be a bit too much on the pedantic side
sometimes. But still, thanks to the pedantics peoples on usenet that
taught me so much so far and still teach me more and more...


From rowen at cesmail.net  Thu May 15 16:03:08 2008
From: rowen at cesmail.net (Russell E. Owen)
Date: Thu, 15 May 2008 13:03:08 -0700
Subject: Pass data from Python to C++
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <rowen-5B645A.13030715052008@news.u.washington.edu>

In article <g0hrq3$rfb$1 at solaris.cc.vt.edu>, brad <byte8bits at gmail.com> 
wrote:

> I have some c++ binaries that do rather intense number computations. 
> They do it well and rather quickly compared to other languages (not just 
> Python). ...
> 
> However, other components can be written in a more user friendly, more 
> easily maintained language. We've chosen Python for this. The main 
> question now is how to pass the computationally heavy info to c++ from 
> within Pyhton. os.system is not ideal. Just wondering how other folks do 
> this? I have source to some of the c++ code, but some of it is in binary 
> from only. It can take stdin or arguments.

You say you have "binary only", but I hope you have the header files as 
well. If so I would try SWIG first since it is mature and handles C++ 
quite well. If you don't have headers then I have no idea if it's even 
possible.

(For plain C I would start with ctypes, but that doesn't cover this 
case. There are many other options including boost and Pyrex, but I've 
not used those.)

-- Russell


From rares at ics.uci.edu  Sun May 25 02:56:10 2008
From: rares at ics.uci.edu (Rares Vernica)
Date: Sat, 24 May 2008 23:56:10 -0700
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <y1r1w3qan3p.fsf@ics.uci.edu>

use a set to store them:

>>> s=set()
>>> s.add('a')
>>> s.add('b')
>>> s
set(['a', 'b'])
>>> s.add('a')
>>> s
set(['a', 'b'])
>>> s.add('c')
>>> s
set(['a', 'c', 'b'])
>>> 

it does remove duplicates, but is it not ordered. to order it you can
use:

>>> l=list(s)
>>> l.sort()
>>> l
['a', 'b', 'c']

hth,
Rares


From pavlovevidence at gmail.com  Tue May 13 19:46:23 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 16:46:23 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <fcabf79a-8856-4e9d-89e9-a9b7345fa8ff@59g2000hsb.googlegroups.com>

On May 13, 6:09 pm, Eric Anderson <e... at pixelwareinc.com> wrote:
> I mainly work in other languages (mostly Ruby lately) but my text
> editor (Scribes) is python. With python being everywhere for dynamic
> scripting I thought I would read the source to learn the language
> better (I've gone through some basic tutorials but I always prefer to
> learn from real source).

There is one significant drawback of that....


> So right from the start I see the following:
>
> from operator import truth
> if truth(argv):
>   # blah blah blah
>
> It is obvious they are testing to see if any command line arguments.
> But curious for why the function is needed.

It isn't.  The above is terrible code.

1. You don't even need operator.truth; the built-in bool performs that
job.  However, this code could have been written before the advent of
bool, so we'll give it a temporary pass.
2. bool in unnecessary in this context.
3. Lest someone claim that truth serves to document that you are
asking for the boolean value of argv (i.e., whether it's not empty),
it's redundnant since the if statement implies that.


> So I look up the operator
> package and fine it provides functions that are equivalent to the
> native operators. So my question is why would someone right the above
> instead of just
>
> if argv:
>   # blah blah blah
>
> Seems like unnecessary code but obviously I know nothing about Python.

You know more than the person who wrote the code above.

The purpose of the operator module is to provide  functional
representations of Python operators (and a few non-operators) for
functional programming.  They could, for example, be useful as the
arguments of map and reduce.  Few beginners use functional programming
so you might not want to worry about it now, though if you've been
using Ruby you might have done it before.

operator.truth was one of the few things in that module that was
useful for things other than functional programming, since there is no
truth operator in Python.  Now that the language has bool it's no
longer needed.


Carl Banks


From bruno.desthuilliers at gmail.com  Thu May 15 17:25:40 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 14:25:40 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com> 
	<482c428c$0$9669$426a34cc@news.free.fr> <m2bq37a7i5.fsf@googlemail.com>
Message-ID: <ddb0484b-f666-4c6e-88e3-b47fb976edc8@m36g2000hse.googlegroups.com>

On 15 mai, 17:53, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Bruno Desthuilliers <bruno.42.desthuilli... at websiteburo.invalid> writes:
> > FWIW, I wonder why the BDFL choosed to implement __new__ as a
> > staticmethod - there are probably some pretty good reasons, but not
> > knowing them, it looks like __new__ would have been a perfect
> > candidate for a classmethod.
>
> > So far, the only reason I can think of is that making it a classmethod
> > would have required the use of super(Parent, cls) to call the parent's
> > class __new__, which may (or may not - never had the case) be
> > problematic (any guru on this ?)
>
> Don't know but I remember something about this in 'Unifying types and
> classes'.  There it is:
>
>     Factoid: __new__ is a static method, not a class method. I
>     initially thought it would have to be a class method, and that's
>     why I added the classmethod primitive. Unfortunately, with class
>     methods, upcalls don't work right in this case, so I had to make
>     it a static method with an explicit class as its first
>     argument. Ironically, there are now no known uses for class
>     methods in the Python distribution (other than in the test
>     suite). I might even get rid of classmethod in a future release if
>     no good use for it can be found!
>
> (http://www.python.org/download/releases/2.2/descrintro/)

Thanks Arnaud. I knew there was something about this, but just
couldn't remember what. Now at least this factoid makes sense to
me :-)

Strange enough, it happened that classmethods ended being much more
used that staticmethods...

> I don't have the time to try to figure it out :(

class Foo(object):
    @classmethod
    def dothis(cls):
        print "Foo.dothis, cls is %s" % cls

    @staticmethod
    def dothat(cls):
        print "Foo.dothat, cls is %s" % cls

class Bar(Foo):
    @classmethod
    def dothis(cls):
        print "Bar.dothis, cls is %s" % cls
        try:
            Foo.dothis(cls)
        except Exception, e:
            print "trying direct call to Foo.dothis(cls), got %s" % e
        try:
            super(Bar, cls).dothis()
        except Exception, e:
            print "trying call to super(Bar, cls).dothis(), got %s" %
e

    @staticmethod
    def dothat(cls):
        print "Bar.dothat, cls is %s" % cls
        try:
            Foo.dothat(cls)
        except Exception, e:
            print "trying direct call to Foo.dothat(cls), got %s" % e
        try:
            super(Bar, cls).dothat(cls)
        except Exception, e:
            print "trying call to super(Bar, cls).dothat(), got %s" %
e

For classmethods, you *need* to use super to call the parent's class
classmethod from within the overridden child class classmethod. Which
sometimes may not be what you want for __new__. While this is a kind
of a corner case (that I never met so far, hence my interrogations
about why is __new__ a staticmethod taking the class as argument
instead of a classmethod), it is still a potential showstopper.





From workitharder at gmail.com  Wed May 21 20:06:07 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:06:07 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
Message-ID: <a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>

On May 21, 4:33 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> Andr? <andre.robe... at gmail.com> wrote innews:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com:
>
> > How about something like the following (untested)
>
> > done = False
> > while not done:
> >   try:
> >      some_function()
> >      done = True
> >   except:
> >      some_function2()
> >      some_function3()
>
> Sure, that works, but I was aiming for something more elegant and Pythonic
> ;).
>
> --
>  _______                                        Karlo Lozovina - Mosor
> |   |   |.-----.-----.     web:http://www.mosor.net|| ICQ#: 10667163
> |       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
> |__|_|__||_____|_____|

It's hard to get around a while loop if you want to conditionally
repeat something. There's no built-in way to do what you ask.


From kyosohma at gmail.com  Fri May 23 16:53:28 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:53:28 -0700 (PDT)
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <ac11238f-395e-4999-83ed-022649989d40@a70g2000hsh.googlegroups.com>

On May 23, 3:36?pm, davidj411 <davidj... at gmail.com> wrote:
> When you save an open file to a variable, you can re-use that variable
> for membership checking.
> it does not seem to be that way with the csv.reader function, even
> when set to a variable name.
>
> what is the best way to store the open CSV file in memory or do i need
> to open the file each time?
>
> example of open method on file object:
> fhandle=open(filename).readelines()
>
> example of csv.reader method:
> reader = csv.reader(open(csvfilename))
>
> here are my results:>>> reader = csv.reader(open('export.csv'))
> >>> for line in reader:
>
> ... ?print line
>
> <lots of data on page...>
>
> but when i try to iterate through it again, it appears to print
> nothing (no error either). the file is exhausted?
>
> >>> for line in reader:
>
> ... ?print line
> ...
>
> do i need to seek() the beginning of this file object ? any help is
> greatly appreciated here.

I think using seek() is what you need as it is currently starting on
the last line that it read, so to speak. You should have just tried
it...experimenting is part of the fun of Python, after all.

Mike


From tjreedy at udel.edu  Sat May 17 13:54:05 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 May 2008 13:54:05 -0400
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com><dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>
Message-ID: <g0n63t$7qm$1@ger.gmane.org>


"eliben" <eliben at gmail.com> wrote in message 
news:b439e7f0-685b-46b6-b0ea-3161cc548868 at m45g2000hsb.googlegroups.com...
| Is there a simple way to find out which packages are used by my
| script ?

Ggrep for import statements?
 (But that only only gives direct dependencies.)
Does py2exe have an option to output the list it collects?|
I think people have mentioned such here. 





From bruno.desthuilliers at gmail.com  Wed May  7 15:10:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 12:10:26 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<68e2a1F2s43b2U1@mid.individual.net>
Message-ID: <fa4f9ac4-e9ab-4326-bb0a-747bb7bbef5c@2g2000hsn.googlegroups.com>

On 7 mai, 18:05, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> jmDesktop wrote:
> > Studying OOP and noticed that Python does not have Interfaces.
>
> By "OOP", you mean "Java", right? 8)
>
> > Is that correct?  Is my schooling for nought on these OOP concepts
> > if I use Python.  Am I losing something if I don't use
> > the "typical" oop constructs found in other languages (Java, C#
> > come to mind.)
>
> AFAIK, Interfaces weren't "typical" before Java. CMIIW.
>
> BTW, Zope has interfaces. Not sure if it's exactly the same.
>
It isn't.


From ivan.illarionov at gmail.com  Mon May 26 18:24:14 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:24:14 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
Message-ID: <g1fdae$2cld$2@news.mtu.ru>

On Mon, 26 May 2008 15:18:00 -0700, Gandalf wrote:

> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
>> > Thanks!
>> > Anyone know which library should i learn then?
>>
>> Looks like you need to dive into Win32
>> APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://
msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
>> and others
>> combined with ctypes.
>>
>> Ivan
> 
> well, that seems extremely valuable but how can i implement those
> functions with python?

Google is your friend
Some links with examples:
http://www.brunningonline.net/simon/blog/archives/000652.html
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/208699


From ivan.illarionov at gmail.com  Mon May 26 14:54:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 18:54:50 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com>
Message-ID: <g1f11p$2a08$1@news.mtu.ru>

Sebastian 'lunar' Wiesner wrote:

>>> Modern frameworks like Django or Grok require a somewhat great
>>> adaption, since they strongly restrict the programmer's freedom.  I
>>> doubt, that you would get Django or Grok working like your asp
>>> framework.
>> 
>> Actually, modern frameworks (at least Djagno) does not "restrict the
>> programmer's freedom", they only encourage clean design.
> 
> Can we agree on the fact, that Django _encourages clean design_ by
> _restricting the programmers freedom to some degree_?  This comprise
> would avoid an endless war about framework philosophy ;)  (and isn't so
> far from the truth, btw)

Yes, it makes very little sense to not follow conventions in Django. I 
have no problem with some people call it "some degree of restriction" ;)

If the OP wants PHP-style programming he will get better results with PHP 
because PHP was designed this way. Any Pythonic solution will be an 
overkill.

Ivan


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:16:56 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:16:56 +0200
Subject: explain this function to me, lambda confusion
In-Reply-To: <K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
Message-ID: <48315398$0$14949$426a34cc@news.free.fr>

inhahe a ?crit :
>> Both the responses offer lambda free alternatives. That's fine, and
>> given the terse documentation and problems that I had understanding
>> them, I would agree. So what applications are lambdas suited to? I
>> think the parameterised function model is one.
>> What else?
> 
> i've hardly ever used lambdas since map() and filter() were replaced by list 
> comprehension.  two other uses I can think of for it are: using it as a 
> sorting key (which takes a function and lambdas are perfect for that when a 
> direct function isn't available. for example, lambda x: x.myName),

import operator
foos.sort(key=operator.attrgetter('myName'))




From gagsl-py2 at yahoo.com.ar  Mon May 12 02:25:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:25:41 -0300
Subject: cgitb performance issue
References: <481F585A.5080707@admailinc.com>
Message-ID: <op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman <efurman at admailinc.com> escribi?:

> I tried adding a form to our website for uploading large files.
> Personally, I dislike the forms that tell you you did something wrong
> and make you re-enter *all* your data again, so this one cycles and
> remembers your answers, and only prompts for the file once the rest of
> the entered data is good.  However, the first time the form loads it can
> take up to 30 seconds... any ideas why?

Hard to tell without looking at the code... And what has cgitb to do with this?

-- 
Gabriel Genellina



From tarun.kap at gmail.com  Mon May  5 14:11:19 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 11:11:19 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com> 
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
Message-ID: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>

On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>
> > Mike Driscoll wrote:
> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
> > >> I need to do SSL file transfer using python? Is there a library i can
> > >> use ?
>
> > >http://sandbox.rulemaker.net/ngps/m2/
>
> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> > --
> >   Heikki Toivonen
>
> Whoops...I just went with the first link Google gave me. The link I
> gave doesn't mention that the project has moved. Looks like the one
> you link to is the 9th link on my Google search using the terms:
> "python m2crypto".
>
> Sorry if I spread misinformation though.
>
> Mike

ok i have tried around a lot but no luck. I think M2Crypto is my best
option except it requires a minimum of python 2.4 which i don't have.

What i am trying to do is to do an FTP transfer that uses SSL
(username, password authentication) and not a certificate file. The
few example i have found of the Openssl module use a certificate for
authentication unlike what i want to do.

Anyone has any ideas ?


From wuwei23 at gmail.com  Mon May 26 19:24:20 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 16:24:20 -0700 (PDT)
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <25ad2c27-1a79-4402-99de-034fc2d59f77@v26g2000prm.googlegroups.com>

On May 27, 8:39 am, Jean-Claude Neveu <jcn-france1... at pobox.com>
wrote:
> I tried to do this by using in the i loop the line:
>
>         message = email.message_from_file(j)
>
> but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

Heya,

The email module has a second function - 'message_from_string' - which
might be more useful here. Currently, you're passing to
'message_from_file' a string that it tries to treat as a file, hence
it complaining about the string object not having part of the file
object interface.

(I've never used email or poplib, so this is just a guess...)

- alex23


From ethan at stoneleaf.us  Fri May 30 16:46:52 2008
From: ethan at stoneleaf.us (Ethan Furman)
Date: Fri, 30 May 2008 12:46:52 -0800
Subject: php vs python
Message-ID: <484067BC.6090005@stoneleaf.us>

Jerry Stuckle wrote:

 >
 > As I've said before - good programmers can write good code in any
 > language.
 >

So... an eloquent speaker of English is also an eloquent speaker of 
Spanish/French/German?

I think your statement would be correct if worded: some programmers can 
write good code in any language.  There's a reason why computer coding 
paradigms are called 'languages' -- because they are, and as such they 
require different ways of thinking.  Just because someone is good at 
playing pianos doesn't mean they are also good at wood carving.  Just 
because someone is good (i.e. writes good code) in C / PHP / Python / 
Perl / Assembly / whatever does not inherently mean that that same 
person will be able to write good code in any other language.  That's 
one reason why there are so many to choose from: different people think 
differently and most are only optimal in certain areas.

Or perhaps your definition of a good programmer means somebody who can 
write good code in any language?  What then is a programmer who can only 
write good code in a handful of languages?  Or maybe only two languages? 
   Or even only one?

My definition of a good programmer is someone who can write good code in 
a computer language.  I would use the word 'versatile' or even 
'multi-lingual' to broaden the scope to more than one language.
--
Ethan

P.S.
My apologies, Jerry, for writing back to you directly -- I haven't yet 
discovered how to post to newsgroups, and I do not know the php mailing 
list address.  I guess by both our definitions I am not a 'good 
newsgroup poster.'  ;-)



From grante at visi.com  Wed May  7 12:21:48 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 07 May 2008 11:21:48 -0500
Subject: listening on TCP port
References: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>
Message-ID: <hJKdnXg_Bf2BSrzVnZ2dnUVZ_tvinZ2d@visi>

On 2008-05-07, petr.poupa at gmail.com <petr.poupa at gmail.com> wrote:

> is there anybody who has experience with listening on TCP port
> with python? I am looking for anything codes, tutorials,... .


http://docs.python.org/lib/module-socket.html

-- 
Grant Edwards                   grante             Yow! With YOU, I can be
                                  at               MYSELF ...  We don't NEED
                               visi.com            Dan Rather ...


From afrobeard at gmail.com  Thu May 15 17:51:48 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 14:51:48 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
Message-ID: <781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>

Arnaud's code wont work if self.opt1 is None, an empty list, an empty
tuple, False, etc, because all these evaluate to false. They wont
print the internal state of these variables. [Just an informational
notice, this may be the behavior you expect]

Secondly, I'm not sure if you know the variable names from before hand
in which case Casey's approach will work, or you need to know them via
introspection. http://www.ibm.com/developerworks/library/l-pyint.html
[Scroll down to attributes].

On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Casey <casey.mcgi... at gmail.com> writes:
> > Hi,
>
> > I have some classes that print variable outputs depending on their
> > internal state, like so:
>
> > def __str__(self):
> > ? ? out = []
> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
> > ? ? ....
> > ? ? return '\n'.join(out)
>
> > Is there any way to make this cleaner?
>
> Maybe.
>
> Have a dictionary of options rather than individual attributes;
> options not in the dictionary are not set. E.g.
>
> mask = {
> ? ? 'opt1': 'option 1 is %s',
> ? ? 'opt2': 'option 2 is %s',
> ? ? ...
> ? ? }
>
> def __str__(self):
> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>
> --
> Arnaud



From Graham.Dumpleton at gmail.com  Tue May 20 04:13:12 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Tue, 20 May 2008 01:13:12 -0700 (PDT)
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<pan.2008.05.20.00.58.50.596857@reidster.net> 
	<1fi434dog4u92tk7na5qhvfapl70mg8d93@4ax.com>
Message-ID: <6c980775-c761-45d3-aeee-7bb24ff14b57@k1g2000prb.googlegroups.com>

On May 20, 2:00?pm, James A. Donald <jam... at echeque.com> wrote:
> > > 2. ?It is not clear to me how a python web application scales. ?Python
> > > is inherently single threaded, so one will need lots of python
> > > processes on lots of computers, with the database software handling
> > > parallel accesses to the same or related data. ?One could organize it
> > > as one python program for each url, and one python process for each
> > > http request, but that involves a lot of overhead starting up and
> > > shutting down python processes. ?Or one could organize it as one
> > > python program for each url, but if one gets a lot of http requests
> > > for one url, a small number of python processes will each sequentially
> > > handle a large number of those requests. ?What I am really asking is:
> > > Are there python web frameworks that scale with hardware and how do
> > > they handle scaling?
>
> Reid Priedhorsky
>
> > This sounds like a good match for Apache withmod_python.
>
> I would hope that it is, but the question that I would like to know is
> how does mod_python handle the problem - how do python programs and
> processes relate to web pages and http requests when one is using mod_python, and what happens when one has quite a lot of web pages and
> a very large number of http requests?

Read:

  http://blog.dscpl.com.au/2007/09/parallel-python-discussion-and-modwsgi.html
  http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading

They talk about multi process nature of Apache and how GIL is not as
big a deal when using it.

The latter document explains the various process/threading modes when
using Apache/mod_wsgi. The embedded modes described in that
documentation also apply to mod_python.

The server is generally never the bottleneck, but if you are paranoid
about performance, then also look at relative comparison of mod_wsgi
and mod_python in:

  http://code.google.com/p/modwsgi/wiki/PerformanceEstimates

Graham



From dieter at handshake.de  Thu May  1 13:55:40 2008
From: dieter at handshake.de (Dieter Maurer)
Date: 01 May 2008 19:55:40 +0200
Subject: Tremendous slowdown due to garbage collection
In-Reply-To: <48161A65.6040705@animats.com>
References: <49b55bca-cbb8-4ac9-8720-4be87b930d5c@m3g2000hsc.googlegroups.com>
	<03594410-2463-430a-81b1-3005cc7e7bac@m44g2000hsc.googlegroups.com>
	<mailman.327.1208018876.17997.python-list@python.org>
	<mailman.257.1209316607.12834.python-list@python.org>
	<48161A65.6040705@animats.com>
Message-ID: <x7y76t52oz.fsf@handshake.de>

John Nagle <nagle at animats.com> writes on Mon, 28 Apr 2008 11:41:41 -0700:
> Dieter Maurer wrote:
> > Christian Heimes <lists at cheimes.de> writes on Sat, 12 Apr 2008 18:47:32 +0200:
> >> andreas.eisele at gmail.com schrieb:
> >>> which made me suggest to use these as defaults, but then
> 
> > We observed similar very bad behaviour -- in a Web application server.
> > Apparently, the standard behaviour is far from optimal when the
> > system contains a large number of objects and occationally, large
> > numbers of objects are created in a short time.
> > We have seen such behaviour during parsing of larger XML documents, for
> > example (in our Web application).
> 
>     Our solution to that was to modify BeautifulSoup to use weak pointers.
> All the pointers towards the root and towards previous parts of the
> document are "weak".  As a result, reference counting alone is sufficient
> to manage the tree.  We still keep GC enabled, but it doesn't find much
> to collect.

It will not help in our setup.

We, too, have almost no cycles -- but the GC does not know this:

  If a large number of objects are created temporarily and not released
  before the generation 1 threshoold is reached, then
  the garbage collector will start collections -- even, if there
  are no or very few cycles.
  A generation 2 garbage collection takes time proportional
  to the total number of (GC aware) objects -- independent of
  the number of cycles.

Dieter


From terry.yinzhe at gmail.com  Sun May 18 11:32:28 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 08:32:28 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
Message-ID: <24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>

On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> escribi?:
>
> > Is there a simple way to get all the instances of one class? I mean
> > without any additional change to the class.
>
> Try with gc.get_referrers()
>
> py> import gc
> py> class A(object): pass
> ...
> py> a,b,c = A(),A(),A()
> py> A
> <class __main__.A at 0x00A3F4E0>
> py> for item in gc.get_referrers(A): print type(item)
> ...
> <type 'getset_descriptor'>
> <type 'getset_descriptor'>
> <type 'tuple'>
> <class '__main__.A'>
> <class '__main__.A'>
> <class '__main__.A'>
> <type 'dict'>
> <type 'dict'>
>
> We need to filter that list, keeping only A's instances:
>
> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> <__main__.A object at 0x00A40E18>]
>
> --
> Gabriel Genellina

But I saw in the help that we should "Avoid using get_referrers() for
any purpose other than debugging. "


From ivan.illarionov at gmail.com  Tue May 27 03:36:20 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 27 May 2008 07:36:20 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
	<g1f2v2$129$01$1@news.t-online.com> <g1f40f$2avo$1@news.mtu.ru>
	<483bb3e9$0$5100$426a74cc@news.free.fr>
Message-ID: <g1gdlj$2j36$1@news.mtu.ru>

On Tue, 27 May 2008 09:10:40 +0200, Bruno Desthuilliers wrote:

> Ivan Illarionov a ?crit :
>> On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:
>> 
>>> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
>>>
>>>> If the OP wants PHP-style programming he will get better results with
>>>> PHP because PHP was designed this way. Any Pythonic solution will be
>>>> an overkill.
>>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>>> committing suicide by shooting yourself into the head with PHP ...
>> 
>> :) I can't imagine anything uglier than Python with its significant
>> whitespace wrapped inside HTML. I guess it could be more damaging than
>> PHP which was written exactly for this purpose.
> 
> Mako template's syntax looks not so ugly to me:
> 
> <%inherit file="base.html"/>
> <% rows = [[v for v in range(0,10)] for row in range(0,10)] %> <table>
>      % for row in rows:
>          ${makerow(row)}
>      % endfor
> </table>
> 
> <%def name="makerow(row)">
>      <tr>
>      % for name in row:
>          <td>${name}</td>\
>      % endfor
>      </tr>
> </%def>

Mako templates are alright. I like them more than Django templates.


From dave.g1234 at gmail.com  Fri May 16 14:44:11 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 11:44:11 -0700 (PDT)
Subject: namespaces and eval
Message-ID: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>

Suppose I have a function in module X that calls eval e.g,

X.py
_______
Def foo(bar):
        Eval(bar)
_______

Now eval will be called using the default eval(bar,globals(),locals())
and globals will pull in anything in module X.

Now I have module Y that calls bar like so
Y.py
________
from x import *
def biz():
        print "Im a silly example!"
Foo("biz()")
_______

Python will complain that it cannot find biz because it's not the X
module.

My question - is there any way to a) get a listing of active namespaes
search ALL active namespaces for a particular variable b) get the
namespace of the caller withing passing it in (here, Y) c) do anything
else to get biz without passing foo("biz()",locals(),globals()) or
hacking biz into the __builtin__ namespace(don't know if it's even
possible, but it defeats the purpose of what I'm trying to do) ?  I
realize this is here for a reason, but I'm working on something that's
kind of a hack already

Thanks
dave


More gratuitous context. Long story I'm trying to write a hack for a
concise way of adding arbitrary methods to objects for JPA/JQuery like
chaning eg.

def foo(self):


class wrap:
    def __init__(self, obj, globalz=globals(),localz= locals()):
        self.obj = obj
        self.localz = localz;
        self.globalz = globalz;

    def __callback__(self, *args, **kw):
        newargs = [self.obj];
        newargs.extend(args);
        print locals
        ret = eval(self.name, self.globalz, self.localz)
(*newargs,**kw);
        return wrap(ret);

    def __getattr__(self,name):
        if hasattr(self.obj,name):
            return getattr(self.obj,name);
        self.name = name;
        return self.__callback__;








From duncan.booth at invalid.invalid  Fri May  2 03:33:52 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 07:33:52 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
Message-ID: <Xns9A9255EE37A96duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:
> 
>> Of course it's not thread safe.   For the same reason and more basic, 
>> even the expression i++ is not thread safe in C++.
>> 
>> Any such calculation, on modern processors, requires three operations: 
>>   retrieve value of i into a register,
>>   increment the register
>>   write the value into i.
> 
> There are no modern processors with an opcode for incrementing a memory
> location!?  At least my C64 can do that.  ;-)
> 
The operation i++ in C/C++ implies two things: it increments the memory 
location and returns the new result. That means there are at least two ways 
to generate code for this:

   increment memory
   load new value

or

   load value
   incremenent
   store

Neither of these is going to be thread-safe (even on a C64) unless you 
protect the operations somehow. The latter is probably preferred as it only 
implies two operations to memory whereas the former implies three.

Even on your C64 incrementing a memory location involves both a read and a 
write, so if you have a multi-core C64(!) there is still scope for another 
processor to get into the middle of that increment instruction.



From yguan08 at gmail.com  Tue May 13 18:33:17 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 15:33:17 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
	<4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
	<482a16a5@news.mel.dft.com.au>
Message-ID: <1c952025-9673-490a-8282-37903fd70dfc@8g2000hse.googlegroups.com>

On May 13, 5:31?pm, John Machin <sjmac... at lexicon.net> wrote:
> ygua... at gmail.com wrote:
> > On May 13, 4:38 pm, John Machin <sjmac... at lexicon.net> wrote:
> >> ygua... at gmail.com wrote:
> >>> I have trouble of obtaining the file size of a file because the
> >>> fullpath exceeds 255 characters. I get this message with
> >> At the DOS command level, you can do
> >> ? ? ?subst x: very\long\path
> >> and then refer to
> >> ? ? ?x:filestem.ext
> >> where x is any unused drive letter.
> > Good idea. But subst does not see to work with path that has spaces.
> > It gives "Incorrect number of parameters"
>
> If any DOS command-line argument includes spaces, you need to quote it.
>
> os.system(r'subst x: "c:\my big fat path\rab oof\etc etc etc"')

Yes, it works now. I am getting more on windows after coming a long
way from Unix. Thanks a lot.


From dstanek at dstanek.com  Mon May 19 21:04:28 2008
From: dstanek at dstanek.com (David Stanek)
Date: Mon, 19 May 2008 21:04:28 -0400
Subject: scaling problems
In-Reply-To: <j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <de32cc030805191804n6c59271ft4012393721a9afa9@mail.gmail.com>

On Mon, May 19, 2008 at 8:47 PM, James A. Donald <jamesd at echeque.com> wrote:
> I am just getting into python, and know little about it, and am
> posting to ask on what beaches the salt water crocodiles hang out.
>
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.  I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

I can assure you that in practice this is not a problem. If you do
proper unit testing then you will catch many, if not all, of the
errors that static typing catches. There are also tools like PyLint,
PyFlakes and pep8.py will also catch many of those mistakes.


> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded, so one will need lots of python
> processes on lots of computers, with the database software handling
> parallel accesses to the same or related data.  One could organize it
> as one python program for each url, and one python process for each
> http request, but that involves a lot of overhead starting up and
> shutting down python processes.  Or one could organize it as one
> python program for each url, but if one gets a lot of http requests
> for one url, a small number of python processes will each sequentially
> handle a large number of those requests.  What I am really asking is:
> Are there python web frameworks that scale with hardware and how do
> they handle scaling?

What is the difference if you have a process with 10 threads or 10
separate processes running in parallel? Apache is a good example of a
server that may be configured to use multiple processes to handle
requests. And from what I hear is scales just fine.

I think you are looking at the problem wrong. The fundamentals are the
same between threads and processes. You simply have a pool of workers
that handle requests. Any process is capable of handling any request.
The key to scalability is that the processes are persistent and not
forked for each request.


> Please don't read this as "Python sucks, everyone should program in
> machine language expressed as binary numbers".  I am just asking where
> the problems are.

The only real problem I have had with process pools is that sharing
resources is harder. It is harder to create things like connection
pools.


-- 
David
http://www.traceback.org


From cjw at ncf.ca  Tue May 20 20:43:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Tue, 20 May 2008 20:43:01 -0400
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <48337015.80202@ncf.ca>

John Salerno wrote:
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. Here's 
> the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and it's 
> being used as everyone expects it to be used. In example 2, however, I began 
> to think this might be an abuse of list comprehensions, because I'm not 
> assigning the result to anything (nor am I even using the result in any 
> way).
> 
> What does everyone think about this? Should list comprehensions be used this 
> way, or should they only be used to actually create a new list that will 
> then be assigned to a variable/returned/etc.? 
> 
> 

Alternative ways of of looking at the 
problem are:

# compress.py
import sets

def compress(s):
     new = []
     [new.append(c) for c in s if c not 
in new]
     return ''.join(new)

def compress1(s):
   new= []
   d= dict(zip(s, len(s)*[[]]))
   return d.keys()

def compress2(st):
   s= sets.Set(st)
   return s

if __name__ == "__main__":
   s= 'In example 1, the intention to 
make an in-place change is explicit, and 
it is'
   print (compress(s))
   print (compress1(s))
   print (compress2(s))

Results:

In exampl1,thiok-cgsd
['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 
'k', '-', 'm', 'l', 'o', 'n', '1', 'p', 
's', 't', 'x', ',', 'd']
Set(['a', ' ', 'c', 'e', 'i', 'g', 'I', 
'h', 'k', '-', 'm', 'l', 'o', 'n', '1', 
'p', 's', 't', 'x', ',', 'd'])

Colin W.


From ivlenin at gmail.com  Tue May 13 19:30:22 2008
From: ivlenin at gmail.com (I V)
Date: Tue, 13 May 2008 23:30:22 GMT
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
Message-ID: <iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com>

On Wed, 14 May 2008 00:38:44 +0200, Christian Heimes wrote:
> Eric Anderson schrieb:
>> Seems like unnecessary code but obviously I know nothing about Python.
> 
> Correct, the truth example isn't a good example. "if argv" is better.

I hadn't heard of operator.truth before. Does it do anything different 
from bool(x) ?


From stefan_ml at behnel.de  Thu May 15 14:14:43 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 15 May 2008 20:14:43 +0200
Subject: Using file objects with elementtree
In-Reply-To: <dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
Message-ID: <482C7D93.2080809@behnel.de>

castironpi at gmail.com wrote:
> What do we render?

Sur.

Stefan


From mattheww at chiark.greenend.org.uk  Fri May 23 13:23:04 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 23 May 2008 18:23:04 +0100 (BST)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <C3q*E9Bds@news.chiark.greenend.org.uk>

John Salerno  <johnjsal at gmailNOSPAM.com> wrote:
> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

You probably could, but it's best not to unless you're somehow forced
to.

In practice, the interface that you want your 'logic' layer to provide
to the GUI is likely to depend on some of the details of how the GUI
works.

If you did the lower levels first without having any idea at all of
what you were going to do with the GUI, it's quite likely that you'd
find you'd written a few functions which turned out not to be needed at
all, or that some functionality that the GUI needs to use very
frequently is rather slow to execute, or that some functionality that
you thought belonged to the 'logic' is really better done in the GUI
layer, and so on and so forth.

For example, if you were writing the 'logic' for a chess program you
might choose a way of modelling the board that can't represent a
position with more than one black king. And then when you got round to
doing the GUI you might find out that your users would like to be able
to have this temporarily when setting up a position.

-M-


From johnjsal at NOSPAMgmail.com  Sun May 18 20:25:16 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 18 May 2008 20:25:16 -0400
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>
Message-ID: <20080518202516.e858910c.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 16:17:55 -0700 (PDT)
Mensanator <mensanator at aol.com> wrote:


> I see no need for GUI in any of these applications.

Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)

Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)


From upton at virginia.edu  Wed May 14 14:22:02 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 14 May 2008 14:22:02 -0400
Subject: I'm stuck in Python!
In-Reply-To: <e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
Message-ID: <5504f9ac0805141122k18ca0a57l2da0b95c4a76db41@mail.gmail.com>

On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwei23 at gmail.com> wrote:
> On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>> "George Sakkis" <george.sak... at gmail.com> wrote in message
>> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
>> > you can safely ignore its posts.
>>
>> How does it generate text?
>
> My guess is by inhaling a lot of intoxicants.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I assumed his message with the subject "bytes1.shuffle()" from a few
days ago was a glimpse into his source code.  Or something like it.


From gagsl-py2 at yahoo.com.ar  Sun May 18 04:49:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 05:49:33 -0300
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
	<r5RXj.48195$3v1.31693@bignews3.bellsouth.net>
Message-ID: <op.ubcdgvawx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 04:42:58 -0300, inhahe <inhahe at gmail.com> escribi?:

> To those who don't want me to feed the bot, I'm sorry.  It's not a bot, and
> I don't know the policy on having philosophical conversations.

If you manage to stay on topic...

-- 
Gabriel Genellina



From catphive at catphive.net  Thu May  1 22:17:34 2008
From: catphive at catphive.net (Brendan Miller)
Date: Thu, 1 May 2008 19:17:34 -0700
Subject: portable fork+exec/spawn
Message-ID: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>

I want to spawn a child process based on an external executable that I have
the path for. I then want to wait on that executable, and capture it's
output.

In the os module, fork is only supported on unix, but spawn is only
supported on windows.

The os.system call is implemented by calling the C system call, which is of
course inefficient and has portability gotchas because it calls the
underlying system shell (sh for unix, cmd for windows, and who knows what
on non unix, non windows platforms like VMS and mac os9). Most importantly,
os.system forces you to wait on the process.

Is there an actual portable means of asynchronously spawning a process and
getting a handle to it, being able to write stdin and read stdout, or does
everyone just write their own wrapper for fork and spawn?

Sorry if this post sounds a little complainy. I was just surprised to find
the os module lacking in portable abstractions over system services.

Brendan


From deets at nospam.web.de  Wed May  7 09:31:02 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 15:31:02 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org>
Message-ID: <68dp9jF2sko92U1@mid.uni-berlin.de>

pistacchio wrote:

> Mike Driscoll ha scritto:
>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>> my server side needs but i can't seem to find what i'm looking for. for
>>> most of my php work i use mysql and tinyButStrong
>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>> engine that offers powerful functionalities. you insert TBS tags in web
>>> pages like:
>>>
>>> <div align="center" class="title-page"> [var.x] </div>
>>>
>>> and it replaces [var.x] with the value of global variable x. it also
>>> makes blocks (and nested blocks) easy to implement:
>>>
>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>> [blk1;block=end] </p>
>>>
>>> in the previous code it cycles throu all the values of the array blk1.
>>>
>>> it does many more things, like htlm escaping, url and js encoding etc,
>>> conditional displaying etc, but it is not more confusing that inserting
>>> pieces of code into the HTML (aka: littering the code and kissing
>>> goodbye to the code/presentation separation). it comes in the form of a
>>> single file with a single class that you can easily include in the code
>>> and go.
>>>
>>> now, i've searched the net and it seems full of python-based frameworks
>>> for doing server side scripting and templating, but none that suits my
>>> needs.
>>>
>>>     1. i like writing code and i like control. i mean, open up the
>>> simplest text editor and write in it. i don't want something that is
>>> command-line driven or that writes code for me like ">>>
>>> makePagesFromThisDatabase()".
>>>     2. i want something very lightweight. i don't want dozen of options,
>>> pre-made blogging parts ecc. i just need a good non invasive template
>>> engine and the basic functions for server side scripting, like session
>>> managing, request parsing, functions to manipulate html code (encodings
>>> etc)
>>>     3. i don't want to beg my hosting provider to install the libraries.
>>> a simple include file should do the work.
>>>     4. object oriented programming is not required (better: i prefer
>>> plain old procedural programming).
>>>
>>> any help? thanks in advance
>> 
> 
> hi, thanks for replaying
> 
>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>> and Genshi in 2.x (I think) for templating purposes. There's also
>> Cheetah, one of the more powerful Python templating engines out there.
>> 
> 
> django is exacly the kind of giant i'm trying to avoid
> 
>> http://genshi.edgewall.org/
> 
> the first lines of the tutorial read:
> "First, make sure you have CherryPy 3.0.x installed"
> Now, cherrypy is something that is not properly "include a file and get
> going!"
>> http://www.kid-templating.org/
> 
> kid seems to have a non-linear approach, but i may give it a try
> 
>> http://www.cheetahtemplate.org/
> 
> cheetah was something that i already considered using. have i to
> "install" it or can i just import it?

You will need to install any of these. It is part of how python is designed.
Extendability comes with a price-tag.

 I don't know for sure, but I guess the cherrypy-requirement of genshi is
more for the tutorial, not for the templating itself.

Diez


From castironpi at gmail.com  Mon May 12 21:20:54 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:20:54 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
Message-ID: <5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>

On May 12, 8:18?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 7:12?pm, castiro... at gmail.com wrote:
>
> > Mine's been always messing up the color wheel.
>
> Messing up in what way? ?Are you using the colors to visualize
> something?

In a manner of speaking.  I'm a first-time-live Information scientist,
just out of work.  LIS at school and plenty of computer study, which
is fine.  Yes, I am trying to visualize something.


From alhanan_clinic at hotmail.com  Tue May  6 16:05:22 2008
From: alhanan_clinic at hotmail.com (Issam)
Date: Wed, 7 May 2008 00:05:22 +0400
Subject: Java or C++?
Message-ID: <BLU116-DAV177FAB976BAAC167A65A5F7D60@phx.gbl>

I need to help me.. please..
I have assingment for C++ programe
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From bruno.desthuilliers at gmail.com  Wed May 14 17:23:09 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:23:09 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <f0436997-a221-46f1-b376-b7407cb41607@f63g2000hsf.googlegroups.com>

On 13 mai, 19:05, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Just to support this statement: PHP runs an order of magnitude slower than
> > python. Yet a great deal (if not the majority) of dynamic sites out there
> > run under PHP. All of these are unhappy customers?
>
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.
>
Some of the slower websites I've seen where using Java - which is
supposedly way faster than Python. And even a static (pure HTML) web
site can become more than painfully slow if the server can't handle
the load, as anyone working in the field could tell you. But this is
obviously one more area where you are just totally clueless.



From rpm9deleteme at earthlink.net  Thu May 22 21:35:10 2008
From: rpm9deleteme at earthlink.net (RPM1)
Date: Thu, 22 May 2008 21:35:10 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
Message-ID: <g1570j$n8g$1@aioe.org>

Larry Bates wrote:
> If your Python program is 
> slow, you have almost assuredly approached it with a wrong method or 
> algorithm.

I agree for most applications.  There are however times where Python 
just isn't fast enough, and that's usually when people write extension 
modules.

I have yet to see a chess engine written in Python that is competitive 
with even a below average C or C++ chess engine.  The same could be said 
of Java, VB, C#, Pearl, ...

So there ARE some tasks that Python just isn't suited for due to 
performance, but not enough for it to steer anyone away from Python.

I have been working on a chess engine and have found that I prototype in 
Python and then port to the D programming language, (which IS fast). 
For example, one of my routines, (generating pseudo-legal moves -- no 
evaluation), in Python runs at 700,000 moves per second, (using Psyco). 
  Ported to D it runs at 22 million moves per second.

Python's advantage is in the software development and maintenance 
phases.  As long as the runtime phase is fast ENOUGH, Python kicks most 
other languages butts.

Patrick




From castironpi at gmail.com  Thu May 15 09:32:37 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 06:32:37 -0700 (PDT)
Subject: send yield
Message-ID: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>

Why can't I write this?


From grante at visi.com  Mon May  5 10:35:44 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 05 May 2008 09:35:44 -0500
Subject: Nested os.path.join()'s
References: <mailman.587.1209997341.12834.python-list@python.org>
Message-ID: <U6SdnXocuoHdhoLVnZ2dnUVZ_tfinZ2d@visi>

On 2008-05-05, Paul Scott <pscott at uwc.ac.za> wrote:

> Today, I needed to concatenate a bunch of directory paths and files
> together based on user input to create file paths. I achieved this
> through nested os.path.join()'s which I am unsure if this is a good
> thing or not.
>
> example:
>
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah

That's not an example of nested os.path.join()'s.

> Question is, is there a better way of doing this? 

I don't think so.

> The above *works* but it looks kinda hackish...

What about it do you think looks hackish?

I supposed you could do this instead:

  path = os.path.join(basedir,picdir)
  if os.path.exists(path) == True :
      blah blah

But I don't really see why that's any better.      

-- 
Grant Edwards                   grante             Yow! Like I always say
                                  at               -- nothing can beat
                               visi.com            the BRATWURST here in
                                                   DUSSELDORF!!


From bronger at physik.rwth-aachen.de  Fri May  2 11:01:12 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 17:01:12 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<87y76ssrx0.fsf@physik.rwth-aachen.de>
	<mailman.458.1209739971.12834.python-list@python.org>
Message-ID: <87tzhgsqbr.fsf@physik.rwth-aachen.de>

Hall?chen!

D'Arcy J.M. Cain writes:

> On Fri, 02 May 2008 16:26:51 +0200
> Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>>> Certainly #! /usr/bin/python is fine if you never expect your
>>> software to run outside of your own little corner of the world
>>> but you asked why people prefer the env version and the answer
>>> is that we want to write software that runs everywhere that
>>> Python runs.
>> 
>> Granted, but you must draw the line somewhere anyway.  I cannot
>
> No one is talking about if statements here.

Sorry to become laconical, but your reply was so, too:
http://en.wikipedia.org/wiki/Abstraction

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From Fdateyhj at gmail.com  Sat May 10 17:21:20 2008
From: Fdateyhj at gmail.com (law)
Date: Sat, 10 May 2008 14:21:20 -0700 (PDT)
Subject: =?windows-1252?Q?Special_INFORMATION_=96_a_must_read?=
Message-ID: <8ed93ac5-37e6-4347-ba46-ceb3d99d1a59@26g2000hsk.googlegroups.com>


Interesting information found at PASGOM. Just click on;
http://www.pasgom.org/traffic.html
http://www.pasgom.org/Stores.html
You may look at this important INFO, view the short but interesting
movies, and even share with others. Interestingly, Registration for
all these is FREE.
Nkaw


From marco at sferacarta.com  Tue May  6 08:15:33 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 14:15:33 +0200
Subject: parameters to lambda's executed at run time.
In-Reply-To: <48203672$1_4@news.bluewin.ch>
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
	<48203672$1_4@news.bluewin.ch>
Message-ID: <IZXTj.33430$o06.12996@tornado.fastwebnet.it>

Boris Borcic wrote:

> One way :
> 
>  >>> from functools import partial
>  >>> def func(item) : print item
> 
>  >>> llist = [partial(func,item) for item in range(5)]
>  >>> for thing in llist : thing()
> 
> 0
> 1
> 2
> 3
> 4

Another way:


class Func(object):
     def __init__(self, item):
         self.item = item
     def __call__(self):
         print self.item

llist = [Func(item) for item in range(5)]
for thing in llist: thing()



From george.sakkis at gmail.com  Mon May 12 21:52:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 18:52:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
Message-ID: <761a3c96-3faf-4347-aeb7-4ca9cba67e42@a23g2000hsc.googlegroups.com>

On May 12, 7:03?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:

> Carl Banks <pavlovevide... at gmail.com> writes:
> > IMHO, whether a varibale is used or not has got to be one of the least
> > important things of all (in no small part because it's easily
> > discernable from nearby code).
>
> I couldn't disagree more.
>
> If you're binding a name to a value that will never be used, you're
> doing me (the reader of the code) a great favour if you indicate
> clearly and concisely that this value is not intended to be referenced
> anywhere else. Saving time for the reader is a very important job of
> the writer of code.

If you push this logic too far, you should del every name immediately
after the last statement it is used in the scope. I would generally
find less readable some code spread with del every few lines, micro-
managing the effective scope of each name. YMMV.

George


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 06:36:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 12:36:34 +0200
Subject: List behaviour
In-Reply-To: <mailman.1154.1210846212.12834.python-list@python.org>
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <482c1226$0$28403$426a34cc@news.free.fr>

Gabriel a ?crit :
> Hi all
> 
> Just wondering if someone could clarify this behaviour for me, please?
> 
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
> 
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]

The problem here is that your first statement

#>>> tasks = [[]]*6

creates a list (task) containing 6 references to the *same* (empty) list 
object. You can check this easily using the identity test operator 'is':

#>>> tasks[0] is tasks[1]
True


In fact, it's exactly as if you had written:

#>>> task = []
#>>> tasks = []
#>>> for i in range(6):
#...     tasks.append(task)
#...

If you want 6 different list objects in tasks, you can use a list 
comprehension instead:

#>>> tasks = [[] for i in range(6)]
#>>> tasks
[[], [], [], [], [], []]
#>>> tasks[0].append(1)
#>>> tasks
[[1], [], [], [], [], []]

HTH


From christof.ecker at googlemail.com  Fri May 23 09:43:33 2008
From: christof.ecker at googlemail.com (christof)
Date: Fri, 23 May 2008 06:43:33 -0700 (PDT)
Subject: KeyError in pickle
References: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com> 
	<g160ce$r41$01$1@news.t-online.com>
Message-ID: <972ec25f-4ff5-48d6-8c10-7578584d76d7@8g2000hse.googlegroups.com>

On 23 Mai, 10:48, Peter Otten <__pete... at web.de> wrote:
> christof wrote:
> > I am using pickle/unpickle to let my program save its documents to
> > disk. While this it worked stable for a long time, one of my users now
> > complained, that he had a file which can't be loaded.
>
> > The traceback is:
>
> >     File "pickle.pyo", line 1374, in loads
> >     File "pickle.pyo", line 858, in load
> > KeyError: 'A'
>
> > Does anybody know this problem. How this can happen and how can I
> > avoid it?
>
> Is this reproducible? How? If not I would guess that the file is corrupted.
>
> Peter

I found the problem: the user did a text export and gave the exported
file the wrong extension. So: the file was not valid python pickle. I
should add a type signature to fhe file format to avoid this.

Thanks anyway,
Christof


From skanemupp at yahoo.se  Thu May 15 13:04:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 10:04:08 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
Message-ID: <6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com>

when i try to write to the file...

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
<module>
    d.write('hej du galne kock')
IOError: [Errno 0] Error


From a.harrowell at gmail.com  Thu May 29 10:17:12 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 07:17:12 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
	<138c1ce9-80b1-4123-b88d-364055f63d78@i18g2000prn.googlegroups.com>
Message-ID: <908ec1ac-b449-4c99-9f09-5018bc13d4f4@l42g2000hsc.googlegroups.com>

On May 29, 2:24 pm, alex23 <wuwe... at gmail.com> wrote:
> On May 29, 11:09 pm, TYR <a.harrow... at gmail.com> wrote:
>
>
>
> > I'm doing some data normalisation, which involves data from a Web site
> > being extracted with BeautifulSoup, cleaned up with a regex, then
> > having the current year as returned by time()'s tm_year attribute
> > inserted, before the data is concatenated with string.join() and fed
> > to time.strptime().
>
> > Here's some code:
> > timeinput = re.split('[\s:-]', rawtime)
> > print timeinput #trace statement
> > print year #trace statement
> > t = timeinput.insert(2, year)
> > print t #trace statement
> > t1 = string.join(t, '')
> > timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> > year is a Unicode string; so is the data in rawtime (BeautifulSoup
> > gives you Unicode, dammit). And here's the output:
>
> > [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> > 2008 (OK, so the year is a year)
> > None (...but what's this?)
> > Traceback (most recent call last):
> >   File "bothv2.py", line 71, in <module>
> >     t1 = string.join(t, '')
> >   File "/usr/lib/python2.5/string.py", line 316, in join
> >     return sep.join(words)
> > TypeError
>
> list.insert modifies the list in-place:
>
> >>> l = [1,2,3]
> >>> l.insert(2,4)
> >>> l
>
> [1, 2, 4, 3]
>
> It also returns None, which is what you're assigning to 't' and then
> trying to join.
>
> Replace your usage of 't' with 'timeinput' and it should work.

Thank you.


From tjreedy at udel.edu  Fri May  9 15:53:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:53:13 -0400
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <g02a35$jq2$1@ger.gmane.org>


"XLiIV" <Tymoteusz.Jankowski at gmail.com> wrote in message 
news:68618c8b-f17e-496a-9092-5e2cd16b365b at p25g2000hsf.googlegroups.com...

Pipelining works best when all functions have just one input.
But that is a small subset of actual programs. 





From Lie.1296 at gmail.com  Fri May 16 16:56:10 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 16 May 2008 13:56:10 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com> 
	<3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com> 
	<6895c7ef-7886-4cf4-b558-a869a4bb9d06@z24g2000prf.googlegroups.com>
Message-ID: <aad8268c-dd74-41bd-975d-a43a62bfd6bb@l28g2000prd.googlegroups.com>

On May 17, 2:06?am, Lie <Lie.1... at gmail.com> wrote:
> On May 9, 7:36?pm, Unknown Hero <unknown_hero... at hotmail.com> wrote:> Ah, never mind, got it to work. Here's the code now. I hope I won't
> > run into another problems later :D
>
> > <code snippet>
> > #Goes through all keys and subkeys in the selected hive (defined as
> > root) and replaces the value 'old' with the value 'new'
> > #
> > #IMPORTANT! You should always back up the registry before attempting
> > to modify it.
> > #The author of this script CANNOT BE HELD RESPONSIVE for any damage
> > caused by running this script.
>
> (snip)
>
> One thing though, the disclaimer should not said the author cannot be
> held responsive, or you would be Windows that is not responsive all
> the times. I think it should say "responsible".
>
> I'm quite confused though, the code could be made simpler by dozens
> using Python's high-level functionalities. Particularly the lengthy
> code that checked whether the string contained a substring and replace
> the substring with new could be done easily (and faster) using
> python's in and replace function. I'll post the code later when I
> finished checking places where the codes could be simplified, and I'll
> also polish the entry code and a few other things (and pythonify the
> code according to the PEP 8's guide lines).

The tidied code ++

'''
Goes through all keys and subkeys in the selected hive (defined
as root) and replaces the value 'old' with the value 'new'

IMPORTANT! You should always back up the registry before
attempting to modify it. The author of this script CANNOT BE
HELD RESPONSIBLE for any damage caused by running this script.

You can call the script from a command line and pass two or
three values: HIVE, OLD, and NEW.

OLD and NEW can be any string value
HIVE has to be one of the following:

HKEY_LOCAL_MACHINE / HKLM
HKEY_CURRENT_USER / HKCU
HKEY_CLASSES_ROOT / HKCR
HKEY_USERS / HKU
HKEY_CURRENT_CONFIG / HKCC

If NEW is not specified, values that matches OLD will be replaced
with empty string (i.e. deleted)
'''

import _winreg
import sys

HIVES = {
    "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
    "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
    "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
    "HKEY_USERS" : _winreg.HKEY_USERS,
    "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG,
}

AccessError = False

class RegKey(object):
    def __init__ (self, name, key):
        self.name = name
        self.key = key

    def __str__ (self):
        return self.name

def walk(top):
    """ Walk through each key, subkey, and values

    Walk the registry starting from the key top
    in the form HIVE\\key\\subkey\\..\\subkey and generating
    key, subkey_names, values at each level.

    key is a lightly wrapped registry key, including the name
    and the HKEY object.
    subkey_names are simply names of the subkeys of that key
    values are 3-tuples containing (name, data, data-type).
    See the documentation for _winreg.EnumValue for more details.
    """

    try:
        if "\\" not in top:
            top += "\\"
        root, subkey = top.split ("\\", 1)
        key = _winreg.OpenKey(HIVES[root],
                              subkey,
                              0,
                              _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)

        subkeys = []
        i = 0
        while True:
            try:
                subkeys.append(_winreg.EnumKey(key, i))
                i += 1
            except EnvironmentError:
                break

        values = []
        i = 0
        while True:
            try:
                values.append(_winreg.EnumValue(key, i))
                i += 1
            except EnvironmentError:
                break

        yield RegKey(top, key), subkeys, values

        for subkey in subkeys:
            for result in walk(top + "\\" + subkey):
                yield result

    except WindowsError:
        global AccessError
        AccessError = True



def main(start, startHandle, old, new):
    basickeys = []
    i = 0
    while True:
        try:
            basickeys.append(_winreg.EnumKey(startHandle, i))
            i += 1
        except EnvironmentError:
            break

    for x in basickeys:
        for key, subkey_names, values in walk(start + "\\" + x):
            for (name, data, type) in values:
                if type == _winreg.REG_SZ:
                    if old in data:
                        winreg.SetValueEx(key.key,
                                          name,
                                          0,
                                          type,
                                          data.replace(old, new))
                        print key.key, name, 0, type,
data.replace(old, new)

def help():
    #Show help
    print '''
    USAGE: Registry.py HIVE OLD [NEW]
        HIVE: The root key in registry you want to go through.
            HKEY_CLASSES_ROOT / HKCR
            HKEY_CURRENT_USER / HKCU
            HKEY_LOCAL_MACHINE / HKLM
            HKEY_USERS / HKU
            HKEY_CURRENT_CONFIG / HKCC

        OLD: The value to search for.
            Wrap multiword strings with "".

        NEW: The value which will replace OLD.
            Wrap multiword strings with "".
            If not supplied, it default to empty string
            which means delete all occurence of OLD
            in the registry.

    '''
if __name__ == '__main__':
    if len(sys.argv) < 3 or len(sys.argv) > 4:
        print 'Invalid Number of Arguments'
        help()
        exit()

    ## Root Hive
    try:
        start = {
            'HKCU'                : 'HKEY_CURRENT_USER',
            'HKLM'                : 'HKEY_LOCAL_MACHINE',
            'HKCR'                : 'HKEY_CLASSES_ROOT',
            'HKU'                 : 'HKEY_USERS',
            'HKCC'                : 'HKEY_CURRENT_CONFIG',
        }[sys.argv[1].upper()]
    except KeyError:
        start = sys.argv[1].upper()
    try:

        startHandle = {
            'HKEY_CURRENT_USER'   : _winreg.HKEY_CURRENT_USER,
            'HKEY_LOCAL_MACHINE'  : _winreg.HKEY_LOCAL_MACHINE,
            'HKEY_CLASSES_ROOT'   : _winreg.HKEY_CLASSES_ROOT,
            'HKEY_USERS'          : _winreg.HKEY_USERS,
            'HKEY_CURRENT_CONFIG' : _winreg.HKEY_CURRENT_CONFIG,
        }[start]
    except KeyError:
        print >> sys.stderr, 'Invalid Hive'
        help()
        exit()

    ## The substring to be replaced
    old = sys.argv[2]

    ## The replacement string
    try:
        new = sys.argv[3]
    except:
        new = ''
    main(start, startHandle, old, new)
    if AccessError:
        print '''
Some keys cannot be changed because you don't have the appropriate
permission to modify those keys, please try again with a suitable
user account.
        '''



From spectrumdt at gmail.com  Fri May  9 06:19:03 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 03:19:03 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>


Thanks for the replies.

On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> Ctrl+C often works with Python, but as with any language, it's possible
> to write a program which will not respond to it. ?You can use Ctrl+\
> instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> Ctrl+\ sends SIGQUIT which typically isn't)

Yes, thank you, this seems to work. :)

I did some more testing and found out that the problem seems to be
thread-related. If I have a single-threaded program, then Ctrl+C
usually works, but if I have threads, it is usually ignored. For
instance, the below program does not respond to Ctrl+C (but it does
die when issued Ctrl+\):



import threading

def loop():
  while True:
    pass

threading.Thread(target=loop,args=()).start()


From d3vvnull at gmail.com  Sat May  3 12:30:54 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Sat, 3 May 2008 11:30:54 -0500
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <pecora-D066F9.11241203052008@ra.nrl.navy.mil>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
	<A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>
	<pecora-D066F9.11241203052008@ra.nrl.navy.mil>
Message-ID: <170543c70805030930u5130cb42w5b55248038f42997@mail.gmail.com>

I work on an AIX system where /usr/bin and /usr/local/bin apps can only be
installed by root. Our system doesn't have python or many other tools we
like to use installed so we have to install python in an alternate directory
location. We have a system installation of Perl installed, but it's a
release or two older than what we need, so we have done the same for perl.
Thus, #!/usr/bin/env whatever allows our developers to experiment without
always requiring the services of the admins, who are spread too thinly
amongst all the other *Nixes they have to support, and who are also
separated by many layers of red tape from us.

On Sat, May 3, 2008 at 10:24 AM, Lou Pecora <pecora at anvil.nrl.navy.mil>
wrote:

> In article <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d at visi>,
>  Grant Edwards <grante at visi.com> wrote:
>
> > On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> > > On Sat, 03 May 2008 00:44:00 +1000
> > > Ben Finney <bignose+hates-spam at benfinney.id.au<bignose%2Bhates-spam at benfinney.id.au>>
> wrote:
> > >> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> > >> > As someone else pointed out, not all the world is Linux.
> > >>
> > >> It's a good thing I've never implied such to be the case.
> > >
> > > You haven't *said* it but you have definitely *implied* it.
> > > Installing Python in /usr/bin is not common.
> >
> > It is common.  That's where it's installed by almost all Linux
> > distributions.
>
> MacOS X system python (or links to them) is in the same place.
>
> --
> -- Lou Pecora
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From wuwei23 at gmail.com  Thu May 29 07:45:06 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 04:45:06 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <4dadfe24-4c0c-4bd3-8e7c-d3d8ab2ef911@g16g2000pri.googlegroups.com>

On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

>>> file1 = set((x for x in open('file1')))
>>> file2 = set((x for x in open('file2')))
>>> file3 = file2.difference(file1)
>>> open('file3','w').writelines(file3)


From stef.mientki at gmail.com  Sun May 18 17:15:10 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sun, 18 May 2008 23:15:10 +0200
Subject: multiple databases, what's the best interface ?
In-Reply-To: <483021A3.9060908@egenix.com>
References: <482F29DF.2040804@gmail.com> <483021A3.9060908@egenix.com>
Message-ID: <48309C5E.5060902@gmail.com>

thanks guys,
I'll take a look at your suggestions.
cheers,
Stef

M.-A. Lemburg wrote:
> On 2008-05-17 20:54, Stef Mientki wrote:
>> hello,
>>
>> I need to switch fluently between 2 or 3 types of dbases:
>> SQLite, Sybase ( and in the future MS SQL-server).
>>
>> I need both closed application and general purpose database manager,
>> which should run on different platforms (windows, windows mobile, not 
>> web based).
>>
>> I would like to write the applications in Python.
>> What's the best interface so I can use the same program for all 
>> databases,
>> and just have to change the database name, if I want to use another 
>> database ?
>
> If you need a common interface on all the platforms, then I'd suggest
> you have a look at our mxODBC:
>
> http://www.egenix.com/products/python/mxODBC/
>
> If you also need to support Windows Mobile, then you'll be interested
> in our upcoming new product called "mxODBC Connect" which separates
> the client from the server.
>
> mxODBC Connect allows using the mxODBC API on platforms which don't
> come with ODBC drivers or where getting ODBC drivers is difficult.
> Due to it's client-server approach it also simplifies configuration
> a lot.
>



From mail at timgolden.me.uk  Tue May  6 07:44:49 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 12:44:49 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
Message-ID: <482044B1.5040906@timgolden.me.uk>

Unknown Hero wrote:
> Hi everyone!
> 
> Well, I have this need for a Python script that will scan through a
> selected hive (like HKEY_LOCAL_MACHINE) and replace all strings that
> contain word xxx (IE. foo) with yyy (IE. moo). I do not want partial
> results, but rather complete strings (no foome or the like, just foo).
> 
> 
> I have a basic understanding of Python, but this is beyond my skills.
> 
> I was looking for something like this:
> 
> open key (HKEY_LOCAL_MACHINE)
> while (not end of list)
>   open next subkey
>   search subkey for value (old)
>   SetValue(key, subkey, REG_SZ, new)
>   close subkey
> end while
> close key

In a spirit of teaching people to fish...

... If you put something like "Python windows registry" into Google, you
get quite a few hits, the top one of which is probably pointing to the stdlib
_winreg module, but several others point towards wrapper classes, modules
etc. which provide a simpler or at least a different interface to the registry.

Have a look at those and see if you can't work out what to do.

TJG


From darcy at druid.net  Wed May 28 06:39:12 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 28 May 2008 06:39:12 -0400
Subject: A quick question
In-Reply-To: <g1jbtt+bf6m@eGroups.com>
References: <g1jbtt+bf6m@eGroups.com>
Message-ID: <20080528063912.3a10053b.darcy@druid.net>

On Wed, 28 May 2008 10:25:01 -0000
"James" <cobrocks at msn.com> wrote:
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  
> How can I get these integers to print as letters?  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  

Try "for letter in start:"

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From guptaabhishek1983 at gmail.com  Thu May 29 15:38:22 2008
From: guptaabhishek1983 at gmail.com (abhishek)
Date: Thu, 29 May 2008 12:38:22 -0700 (PDT)
Subject: Help needed in choosing an algorithm for Cryptographic services.
Message-ID: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>

Hi group, recently my employer asked me too implement encryption/
decryption for secure data transfer over internet. Problem is that the
client application is written using C# and the webserver where i need
to store the information is developed using python.

My situation of dilemma is which cryptographic method suits me best
for this purpose.

Help/Suggestions are urgently required

Thank you ,
Abhishek


From tjreedy at udel.edu  Fri May 16 19:46:52 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 19:46:52 -0400
Subject: can't delete from a dictionary in a loop
References: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
Message-ID: <g0l6dd$d1p$1@ger.gmane.org>


"Dan Upton" <upton at virginia.edu> wrote in message 
news:5504f9ac0805161422r31f3a0d6sbe4e49914ade7383 at mail.gmail.com...
| RuntimeError: dictionary changed size during iteration

If you do not actually need a dict, an explicitly managed list is an 
[untested]alternative.

maxproc = #
procs = []
while True:
  if len(procs) < maxproc: [populate procs up to maxproc]
  i, nprocs = 0, len(procs)
  if not nprocs: break
  while i < nprocs:
    if terminated(procs[i]):
      del procs[i]
      nprocs -= 1
    else:
       i += 1

I am assuming that maxproc is low enough that the O(n) behavior of deletion 
is inconsequential.

tjr





From pavlovevidence at gmail.com  Wed May 21 21:01:53 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 18:01:53 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>

On May 21, 4:56 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
> > My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

Having done much mathematical and scientific prorgamming in my day, I
would say your opinion is dead wrong.

The crucial thing is not to slow down the calculations with useless
bells and whistles.  Scientists and engineers are smart enough to use
more precision than we need, and we don't really need that much.  For
instance, the simulations I run at work all use single precision (six
decimal digits) even though double precision is allowed.


Carl Banks


From jpthing at online.no  Fri May 30 16:03:37 2008
From: jpthing at online.no (John Thingstad)
Date: Fri, 30 May 2008 22:03:37 +0200
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
Message-ID: <op.ubzgobgsut4oq5@pandora.alfanett.no>

P? Fri, 30 May 2008 02:56:37 +0200, skrev David Combs <dkcombs at panix.com>:

> In article <rem-2008may08-005 at yahoo.com>,
> Robert Maas, http://tinyurl.com/uh3t  
> <usenet1.3.CalRobert at SpamGourmet.Com> wrote:
>>> From: "xah... at gmail.com" <xah... at gmail.com>
>>> the importance of naming of functions.
>>
>
> Lisp is *so* early a language (1960?), preceeded mainly only by Fortran  
> (1957?)?,
> and for sure the far-and-away the first as a platform for *so many*  
> concepts
> of computer-science, eg lexical vs dynamic ("special") variables, passing
> *unnamed* functions as args (could Algol 60 also do something like that,
> via something it maybe termed a "thunk"), maybe is still the only one
> in which program and data have the same representation -- that it'd
> seem logical to use it's terminology in all languages.
>
> From C is the very nice distinction between "formal" and "actual" args.
>
> And from algol-60, own and local -- own sure beats "static"!
>
> And so on.
>
>
> To me, it's too bad that that hacker-supreme (and certified genius)
> Larry W. likes to make up his own terminology for Perl.  Sure makes
> for a lot of otherwise-unnecessary pages in the various Perl texts,
> as well as posts here.
>
> Of course, a whole lot better his terminology than no language at all!
>
>
> David
>
>

Perl is solidly based in the UNIX world on awk, sed, bash and C.
I don't like the style, but many do.

--------------
John Thingstad


From deets at nospam.web.de  Wed May 21 18:21:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 00:21:38 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
Message-ID: <69jlk4F330nmpU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 21, 3:19 pm, "Dan Upton" <up... at virginia.edu> wrote:
>> The fact is, sometimes it's better to get it fast and be good enough,
>> where you can use whatever methods you want to deal with rounding
>> error accumulation.
> 
> I agree.
> 
> I also think that the precision/speed tradeoff should be under user
> control -- not at the whim of the compiler writer.  So, for example,
> if a user says:
> 
>       Set realdecimaldigits to 10.
> 
> then it's okay to use hardware double precision, but if they say:
> 
>       Set realdecimaldigits to 100.
> 
> then it's not.  The user should always be able to specify the
> precision and the rounding mode, and the program should always provide
> correct results to those specifications.

Which is exactly what the python decimal module does.

Diez


From gabriel.hasbun at gmail.com  Tue May  6 00:00:24 2008
From: gabriel.hasbun at gmail.com (Gasto)
Date: Mon, 5 May 2008 21:00:24 -0700 (PDT)
Subject: Decimal vs Float comparasion
References: <mailman.625.1210045932.12834.python-list@python.org>
Message-ID: <e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>

I still don't see why such a module exists.

 On 5 mayo, 21:52, "Yuan HOng" <hongyuan1... at gmail.com> wrote:
> Hi,
>
> It seems decimal object will always be larger than float in
> comparasion, which goes against common sense:
>
> >>> from decimal import Decimal
> >>> a = Decimal('0.5')
> >>> a > 99999
> False
> >>> a > 99999.0
>
> True
>
> It seems to me that rather than allowing this to happen, comparasion
> between the two should either be made correct (by convertion decimal
> to float e.g.) or forbidden, like arithmatic operations between the
> two types.
>
> --
> Hong Yuan
>
> ?????????
> ???????????http://www.homemaster.cn



From cwitts at gmail.com  Mon May 12 06:31:21 2008
From: cwitts at gmail.com (Chris)
Date: Mon, 12 May 2008 03:31:21 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <ada5acac-ef6f-435b-be6c-ac000b9da14b@b64g2000hsa.googlegroups.com>

On May 11, 3:12?am, globalrev <skanem... at yahoo.se> wrote:
> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
> ? ? if i%3 == 0 and i%5 != 0:
> ? ? ? ? print "Fizz"
> ? ? elif i%5 == 0 and i%3 != 0:
> ? ? ? ? print "Buzz"
> ? ? elif i%5 == 0 and i%3 == 0:
> ? ? ? ? print "FizzBuzz"
> ? ? else:
> ? ? ? ? print i
>
> is there a better way than my solution? is mine ok?

personally if you're just checking if a modulus result is 0 or not I
would rather do as it looks neat imho.

for i in xrange(1,101):
    if not i % 3 and i % 5:
        print 'Fizz'
    elif i % 3 and not i % 5:
        print 'Buzz'
    elif not i % 3 and not i % 5:
        print 'FizzBuzz'
    else:
        print i


From timr at probo.com  Tue May  6 02:13:36 2008
From: timr at probo.com (Tim Roberts)
Date: Tue, 06 May 2008 06:13:36 GMT
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
	<6885g8F2s6gaeU1@mid.uni-berlin.de>
Message-ID: <1ktv14drbmuknvjrbf9kmnd8jb9mqv69so@4ax.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:
>
>You seem to misunderstand HID. HID is a protocol over USB (and Bluetooth I
>believe) that will create user input device events which are mapped to your
>OS input layer. That means that whenever you e.g. attach a keyboard device,
>it's keyboard events will generate key-strokes on screen.

No, it's more than that.  HID devices that are not of a type directly
claimed by the operating system (keyboards, mice) can be accessed by
user-mode programs very easily on both Linux and Windows, without writing a
custom driver.  For low-bandwidth data sources, USB HID is an excellent way
to provide general-purpose access to a USB device.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From bj_666 at gmx.net  Thu May  8 16:57:11 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 20:57:11 GMT
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
Message-ID: <68h7p7F2su97jU3@mid.uni-berlin.de>

On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:

> The thing is, I'm not using slots by choice.  I'm using the standard
> lib "socket" class, which apparently uses slots.

`socket` objects can't be pickled.  Not just because of the `__slot__`\s
but because a substantial part of their state lives in the operating
system's space.

Ciao,
	Marc 'BlackJack' Rintsch


From ggpolo at gmail.com  Wed May  7 17:04:12 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Wed, 7 May 2008 18:04:12 -0300
Subject: Looking for Fredrik Lundh;
	documentation and code examples for elementtree
In-Reply-To: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
References: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
Message-ID: <ac2200130805071404q32b7e9f4xb7936099d9a0abe2@mail.gmail.com>

2008/5/7 dj <d.a.abernathy at gmail.com>:
> Hello All,
>
> I am trying to get in touch with Mr. Lundh. I am looking for exmaple
> code regarding the use of elementtree. I have read through most of the
> examples on http://effbot.org and I am hoping he can suggest some
> others. Additionally, I am hoping he can give me an example use of the
> comment method. I have tried a couple times, but I can not figure it
> out. Thank you so very much.

You should post some question actually, otherwise we can just point at
google and some other links like: http://effbot.org/zone/element.htm,
http://www.ibm.com/developerworks/xml/library/x-matters28/

And.. I think he has been busy these days because I also tried contacting him ;)

Regards,

>
> DJ
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
-- Guilherme H. Polo Goncalves


From inhahe at gmail.com  Mon May 26 16:46:55 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 16:46:55 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
Message-ID: <EjF_j.50578$7a.48174@bignews1.bellsouth.net>

> is it machine -> low-level -> highlevel
> or is it machine -> highlevel
>
> ?

yeah, machine is the lowest level, c is higher than machine.  there isn't 
much that is lower level than c that isn't machine code.  (assembler is just 
mnemonics for machine code, for the most part).   it's machine -> 
low-level -> high level




From daveparker at flamingthunder.com  Tue May 13 13:14:21 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:14:21 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
Message-ID: <8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>

>  Notice that I said "free software", not "*** FREE *** software !!!!
> 1!" (that is, free as in freedom, not free as in beer). Read again my
> answer, considering this.

I misread your meaning.  In a sense, Flaming Thunder is even more free
than "free software".  Flaming Thunder doesn't place any restrictions
on how you use your source code or the executables you create.  There
is no GNU license that you need to worry about.

On May 13, 11:06?am, hdante <hda... at gmail.com> wrote:
> On May 13, 12:24?pm, Dave Parker <davepar... at flamingthunder.com>
> wrote:
>
>
>
>
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.
>
> > Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > (and even less per individual for site licenses), which is less than
> > the cost of just one book on Python.
>
> > I think that many people will find that Flaming Thunder is easier to
> > use and understand than Python -- so for many people the amount of
> > time they save will be worth more than the cost of Flaming Thunder
> > (unless, of course, their time is worth $0).
>
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> > But the future is one of the hardest things to predict, so we'll see.
>
> > On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > > Don't let yourself be irritated by castironpi
>
> > > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > > interaction.
>
> > > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > here. ?If you go back to his postings from a year ago (and selected
> > > > ones since), his comments are coherent and sensible. ?These rambling
> > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > his idea of a joke. ?But they are certainly not worth your time in
> > > > trying to respond to them.
>
> > > > -- Paul
>
> > > ?I don't think castironpi so annoying that I should filter its
> > > messages. It would be enough if he were better tuned. He is much
> > > smarter than the emacs shrink, for example. :-P
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.- Hide quoted text -
>
> > > - Show quoted text -
>
> ?Notice that I said "free software", not "*** FREE *** software !!!!
> 1!" (that is, free as in freedom, not free as in beer). Read again my
> answer, considering this.- Hide quoted text -
>
> - Show quoted text -



From workitharder at gmail.com  Wed May 21 16:27:18 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 13:27:18 -0700 (PDT)
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
	<roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <7b049fb8-c196-4ff6-873b-3893ab670b95@m3g2000hsc.googlegroups.com>

On May 21, 12:13 pm, Roy Smith <r... at panix.com> wrote:
> In article
> <90ecca29-c4d8-4e89-908a-93850d7de... at i76g2000hsf.googlegroups.com>,
>
>  bukzor <workithar... at gmail.com> wrote:
> > Does anyone have a pythonic way to check if a process is dead, given
> > the pid?
>
> > This is the function I'm using is quite OS dependent. A good candidate
> > might be "try: kill(pid)", since it throws an exception if the pid is
> > dead, but that sends a signal which might interfere with the process.
>
> > Thanks.
> > --Buck
>
> The canonical way is to do kill(pid, 0).  If it doesn't throw, the process
> exists.  No actual signal is sent to the process either way.
>
> Of course, the process could exit immediately after the kill() call, so by
> the time you find out it's alive, it's dead.  Such is life.

Thanks! That's exactly what I was looking for. A little more
background:

"If sig is 0 (the null signal), error checking is performed but no
signal is actually sent. The null signal can be used to check the
validity of pid."

Taken from : http://www.opengroup.org/onlinepubs/009695399/functions/kill.html


From pecora at anvil.nrl.navy.mil  Sat May 10 11:06:56 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 10 May 2008 11:06:56 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
Message-ID: <pecora-234295.11065610052008@ra.nrl.navy.mil>

In article <mailman.882.1210361735.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Lou Pecora" <pecora at anvil.nrl.navy.mil> wrote in message 
> news:pecora-DFE713.11234209052008 at ra.nrl.navy.mil...
> | In article <mailman.825.1210293599.12834.python-list at python.org>,
> | "Terry Reedy" <tjreedy at udel.edu> wrote:
> |
> | > "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message
> | > news:200805081914.06459.kyrie at uh.cu...
> | > | Btw, there seems to be a math problem in python with 
> exponentiation...
> | > | >>> 0**0
> | > | 1
> | > | That 0^0 should be a nan or exception, I guess, but not 1.
> | >
> | > a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
> | > But there are unenlighted people who agree with you ;-)
> | > Wikipedia has a discussion of this.
> | >
> | > tjr
> |
> | I like that argument better.  But...
> |
> | I've also heard the very similar a**b is a multiplied by a b-1 times.
> 
> Me too, in school, but *that* definition is incomplete: it excludes b=0 and 
> hence a**0 for all a.  It was the best people could do before 0 was known.
> But 0 was introduced to Europe just over 800 years ago ;-)

[cut some interesting examples]

Yes, I was also thinking about the b=0 case and then the case when b<0.  
If you solve the b<0 case, you solve the b=0 case for a !=0.  Define

a**b= a multiplied by 1/a |b-1| times when b<0.  Then for b=0 we get 
a*(1/a)=1.

Of course, I can avoid all this mathematical dancing around by using 
some of the other simpler definitions like the original one.  :-)

-- 
-- Lou Pecora


From wizzardx at gmail.com  Sat May 24 05:54:11 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 11:54:11 +0200
Subject: Unhandled exceptions checking
In-Reply-To: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <18c1e6480805240254s274cb71am25fb2cf1cfb32b72@mail.gmail.com>

On Sat, May 24, 2008 at 3:31 AM, Yosifov Pavel <aquagnu at gmail.com> wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?
>

Python is too dynamic to do this reliably. eg:

e = exception_returning_func()
raise e

You'll probably be better served by capturing and logging all
unhandled exceptions in your app ("logger.exception(e)" works nicely
in a high level "catch Exception e" block), and then notifying users.

Another thing to try is coverage testing. Won't raise all possible
exceptions in a given  piece of code, but at least you can check if
all lines get run once.

David.


From hniksic at xemacs.org  Fri May 16 05:16:34 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 16 May 2008 11:16:34 +0200
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <8763tea9sd.fsf@mulj.homelinux.net>

"??" <littlesweetmelon at gmail.com> writes:

> Howdy,
>     I wonder why below does not work.
>
> a = object()
> a.b = 1        # dynamic bind attribute failed...

Because the default object class doesn't have a dict or other
indication of state.  It's a "pure" Python object whose only visible
properties are its type and its identity.  (On the implementation
level it also has a refcount.)

This is necessary because all other Python objects (both new-style
classes and C extensions) inherit from 'object', on the C level.
Having state in 'object' would mean having that same in *all* other
Python objects.  The current design, on the other hand, allows
creation of very lightweight python objects that don't even have a
dict.

Subclassing object instructs Python as to what kind of state you want
your class to have.  The default is to have a dict to store
properties:

# a class with dict -- any property goes through dict, and creating a
# Foo object actually creates two objects, one Foo and one dict
class Foo(object):
    pass

But you can also specify:

# an efficient 'Pair' class holding two objects
class Pair(object):
    __slots__ = 'first', 'second'

Instances of Pair take up even less room that 2-element tuples
because they don't carry the size information in the object.

Now, if the object class carried a dict with it, it would be
impossible to create a class like 'Pair'.

> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK
>
> Does this strange behavior break the LSP (Liskov substitution
> principle)?

It follows from LSP that what the subclass may not introduce new
preconditions.  In this case the subclass accepts a case that the
original class didn't, so it doesn't introduce a new precondition, it
simply weakens (removes) an existing one.


From saluk64007 at gmail.com  Sat May 10 19:12:20 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 10 May 2008 16:12:20 -0700
Subject: Now what!?
In-Reply-To: <5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>
Message-ID: <c3f69bf60805101612o5bfebc8ds54c249f93f82857c@mail.gmail.com>

On Sat, May 10, 2008 at 3:57 PM, Grant Edwards <grante at visi.com> wrote:

> On a Linux system (and I presume on other Unixes), the kernel
> itself (if built with the proper options) knows know how start
> a "script" file that starts with the characters "#!".  When the
> kernel is told to execute a file whose first two bytes are "#!"
> (0x32,0x21), it knows to read the newline terminated path of an
> executable starting at the byte following the "!" (the third
> byte in the file).  The kernel then executes that file,
> appending the name of the original "script" file to the argv
> list.


Wow, thanks for the history lesson.  I was under the impression that this
was a bash thing, I had no idea it went as deep as the kernel!
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From duncan.booth at invalid.invalid  Mon May 12 03:31:09 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 07:31:09 GMT
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
	<Xns9A9B83DE83757duncanbooth@127.0.0.1>
	<SeWdnTid7Z7GwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com>
Message-ID: <Xns9A9C5539CF188duncanbooth@127.0.0.1>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>      The sloppy use of "single quote" for the "apostrophe" is unfortunate
><G>

True, but that problem is outside of the Python community's control. Given 
that people do often refer to single quote when they mean apostrophe the 
error message should be written so as to minimise confusion. 



From tim.arnold at sas.com  Mon May 12 17:45:00 2008
From: tim.arnold at sas.com (Tim Arnold)
Date: Mon, 12 May 2008 17:45:00 -0400
Subject: using PIL for good screenshots
Message-ID: <g0adou$1us$1@foggy.unx.sas.com>

Hi,
I'm using PIL to enhance screenshots for print and online publication. I'm 
writing to see if someone else is doing similar work. The shots are dialogs, 
menus, etc. -- my workflow to create the print images:

(1) writer takes screenshot on Windows XP box (96dpi)
----------------------
*** Python Image Library ***
(2) convert to RGB
(3) resize to a writer-specified width using nearest neighbor*
(4) enhance with Sharpness enhancer, factor=2

I think these look pretty good, but if you have a different method or good 
advice, I'd like to hear from you.
*nearest neighbor used for going up in size, antialias for going down in 
size.

thanks,
--Tim Arnold




From ivlenin at gmail.com  Thu May 22 23:00:28 2008
From: ivlenin at gmail.com (I V)
Date: Fri, 23 May 2008 03:00:28 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
	<mailman.1493.1211510178.12834.python-list@python.org>
Message-ID: <grqZj.109$iM3.7@flpi150.ffdc.sbc.com>

On Thu, 22 May 2008 19:35:50 -0700, Charles Hixson wrote:
> Although when comparing Candygram with Erlang it's worth noting that
> Candygram is bound to one processor, where Erlang can operate on
> multiple processors. (I'd been planning on using Candygram for a project
> at one point, but this made it unusable.)

Really? The FAQ says it uses operating system threads, which I would have 
thought would mean it runs on multiple processors (modulo, I suppose, the 
issues with the GIL).



From roopesh.raj at gmail.com  Fri May  9 01:55:46 2008
From: roopesh.raj at gmail.com (Roopesh)
Date: Thu, 8 May 2008 22:55:46 -0700 (PDT)
Subject: Bug in email.utils, parseaddr
Message-ID: <fb5d57bf-1840-43c7-8b31-2abd2dd88e9b@f63g2000hsf.googlegroups.com>

Hi,

I tried using parseaddr of email.utils, but it gave the following
result when the name had a comma inside.

>>> e = 'K,Vishal <vishal at someaddress.biz>'
>>> from email.utils import parseaddr
>>> parseaddr(e)
('', 'K')

Thanks and Regards,
Roopesh


From gagsl-py2 at yahoo.com.ar  Mon May  5 03:18:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 04:18:41 -0300
Subject: bisect intersection
References: <48160045.1030806@jouy.inra.fr>
Message-ID: <op.uan6lfiqx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 28 Apr 2008 13:50:13 -0300, Robert Bossy <Robert.Bossy at jouy.inra.fr> escribi?:

> I stumbled into a sorted list intersection algorithm by Baeza-Yates
> which I found quite elegant. For the lucky enough to have a springerlink
> access, here's the citation:
> http://dblp.uni-trier.de/rec/bibtex/conf/cpm/Baeza-Yates04
>
> I implemented this algorithm in python and I thought I could share it.
> I've done some tests and, of course, it can't compete against dict/set
> intersection, but it will perform pretty well. Computing union and
> differences are left as an exercise...

Nice. As it only uses comparisons, it can be used even if the elements aren't hashable, that's good.
But if they are hashable, using a set and sorting again at the end is much faster, as you discovered.

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Thu May  8 07:17:01 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 8 May 2008 04:17:01 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>

On May 8, 5:25 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>

Are you a newbie to Python, or to programming in general? I'll assume
you are a newbie to programming in general because of that last
question you asked. Things in Python are easier than in almost any
other programming language. Here are three Hello World programs:

--------------C++---------------------
#include <iostream.h>

main()
{
    cout << "Hello World!";
    return 0;
}
--------------------------------------

-------------Java---------------------
class HW {
    public static void main(String args[]) {
        System.out.println("Hello World!");
    }
}
--------------------------------------

------------Python--------------------
print "Hello World!"
--------------------------------------

--------------C#----------------------
<I have no idea!>
--------------------------------------

I think you can clearly see which one is easiest. Of course, that
doesn't mean that the "easiest" language is always the "best"
language, although it is a strong point. But ease of use is just a one-
in-a-million characteristic of Python. If you're a total beginner, I'd
recommend you learning the one that attracts you the most.


From usenet1 at anton.e4ward.com  Mon May  5 05:21:21 2008
From: usenet1 at anton.e4ward.com (Anton81)
Date: Mon, 05 May 2008 11:21:21 +0200
Subject: Weird import problem
References: <fvkoer$2g7h$1@gwdu112.gwdg.de> <68674mF2rjrt5U1@mid.uni-berlin.de>
Message-ID: <fvmjii$2ogp$1@gwdu112.gwdg.de>

>> NS/dir1/file1.py
>> NS/dir2/file2.py
> This *must* be wrong or at least not the full directory listing - please
> read
It is the directory structure in one of the python paths.

> Missing __init__.py in the dir2?
Oh right. I forgot about this. Thank you!


From duncan.booth at invalid.invalid  Thu May  1 03:59:35 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 07:59:35 GMT
Subject: calling variable function name ?
References: <cf179899-177f-4516-95dd-f368eaf7c6a7@f63g2000hsf.googlegroups.com>
	<ad02220c-294c-4c6a-bc61-3165bf5ab08e@f63g2000hsf.googlegroups.com>
	<57461074-8fd1-4e65-9bc9-2ac916aa1fb5@y21g2000hsf.googlegroups.com>
	<m28wyvba54.fsf@googlemail.com> <sj3Sj.3445$XI1.681@edtnps91>
Message-ID: <Xns9A915B7293F8Dduncanbooth@127.0.0.1>

"thinkofwhy" <thinkofwhy at yahoo.ca> wrote:

> Try a dictionary:
> 
>     def funcA(blah, blah)
>     def funcB(blah, blah)
>     def funcC(blah, blah)
>     functions = {'A': funcA, 'B': funcB, 'C': 
> funcC}
>     user_func = 'A'
>     functions[user_func] #execute function

Python has a neat concept for making this easy :^) it is called a class.

class MyFunctions(object):
    def funcA(self, param1, param2):
    	  print "FA " + param1 + " " + param2

    def funcB(self, param1, param2):
    	  print "FB " + param1 + " " + param2

    def funcC(self, param1, param2):
    	  print "FC " + param1 + " " + param2

    def defaultFunc(self, *args):
        print "Command not recognised"

    def doCommand(self, cmd, *args):
        return getattr(self, 'func'+cmd, self.defaultFunc)(*args)

functions = MyFunctions()
result = functions.doCommand('A', 'foo', 'bar')

You have to add an extra 'self' argument to each function (or make it a 
staticmethod), but you could always use it to store state without resorting 
to globals.


From tkpmep at hotmail.com  Thu May 29 16:57:57 2008
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: Thu, 29 May 2008 13:57:57 -0700 (PDT)
Subject: Getting up and running with Python on a Mac
Message-ID: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>

I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
10.5.3), and am looking to install Python on it, and to use it with
XCode, Apple's IDE. Some googling suggests that a number of people
have had trouble getting Python to run satisfactorily on their Macs.
This is my first Mac, and I'd appreciate some guidance on what to do
(and what not to) when installing Python and potential problems to
keep an eye open for. I want to do a fair bit of scientific /
numerical computing, so it would seem that SAGE ot the Enthought
Python distribution would seem to be the most relevant  - I'd
appreciate your guidance on getting Python to run on a Mac with a
particular focus on these two distributions.

Thank you in advance

Thomas Philips


From goldnery at gmail.com  Sat May 31 19:25:10 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 31 May 2008 16:25:10 -0700 (PDT)
Subject: Need Tutorial For the following lib
References: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com> 
	<Ca6dnV-iv7-2TNzVnZ2dnUVZ_vjinZ2d@pdx.net>
Message-ID: <0bdd04b8-23b6-4a68-bda2-6984428ce7bd@b1g2000hsg.googlegroups.com>

Hi scott, you couldn't be more wrong about my laziness. I straggle
with my poor English for hours to fined what I'm looking for.
I found a very simple and not comprehensive tutorial for the pyWinAuto
lib in this address http://pywinauto.openqa.org/
but it only show how to do the basic, and my knowledge at this point
is not enough to figure the rest I need to know by myself
I found another simple  lib for the watsup that based on winGuiAuto
lib in this address
http://www.tizmoi.net/watsup/intro.html
But for some risen I couldn't manage to ran it in my computer

I'm trying to generate auto mouse double click or auto selecting text
(the selecting text part is the one I interest in. mouse double click
just do the same effect if the mouse cursor is on text)

I'm sorry you feel I'm lazy. The truth is that event writing this
message takes me an enormous power.
weather you choose to help me or not I still going to keep trying ,
But you have the opportunity to save me lots of trouble, So maybe one
day I could help others.

so if you familiar with any good tutorial for this library please let
me know and if not then thank you anyway for wonting to help

Y.G





From mccredie at gmail.com  Mon May  5 18:57:52 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 5 May 2008 15:57:52 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
Message-ID: <a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>

On May 5, 10:22 am, Francesco Bochicchio <bock... at virgilio.it> wrote:
> On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:
> > Hi,
> >  In my application, I have some configurable information which is used
> > by different processes. currently I have stored configration in a
> > conf.py file as name=value pairs, and I am importing conf.py file to
> > use this variable. it works well
>
> > import conf
> > print conf.SomeVariable
>
> > but if I need to change some configuration parameteres,  it would need
> > me to restart processes.
>
> > I want to store this data in some conf file (txt) and would like to
> > use it same way as I am using these variables as defined in py
> > files.
>
> > one solution I can think of is writing data as a dictionary into conf
> > file. and then by reading data, apply eval on that data. and update
> > local dict? but this is not a good solution....
>
> > any pointers?
>
> > Sandip
>
>  The 'simple but relatively dangerous way', already suggested, is to
>  reload() the module.
>
> A safer way - but requiring more work - could be to build something around
> the Configparser module in the standard library ...
>
> Ciao
> -----
> FB

How is it relatively dangerous? I mean, aside from any `dangers'
associated with importing a user defined module in the first place.

Matt


From afilash+python at gmail.com  Tue May 20 13:52:01 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Tue, 20 May 2008 23:22:01 +0530
Subject: AttributeError: module object has no attribute
In-Reply-To: <g0v1r3$ikn$1@registered.motzarella.org>
References: <g0v1r3$ikn$1@registered.motzarella.org>
Message-ID: <9f9d35df0805201052r7fd6b54dof70822a0a820e23d@mail.gmail.com>

hai nikhil,
please check your __init__ file if you had any

cheers,
abhilash

On Tue, May 20, 2008 at 11:00 PM, Nikhil <mnikhil at gmail.com> wrote:

> I have recently written a small module. When I import the module, I always
> get the error
>
>
> only when I do
>
> >>> from local.my.module import *
>
> --
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> ---
>
>
> but when I do the below, I do not get any error.
>
> --
> >> import local.my.module
> >>
> --
>
> Any ideas on what could be wrong?
>
>
> Thanks in advance.
>
> Nikhil
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From deets at nospam.web.de  Fri May 23 07:59:43 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 13:59:43 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <4836a876$0$11623$607ed4bc@cv.net>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
	<69nls3F344g2cU1@mid.uni-berlin.de>
	<4836a876$0$11623$607ed4bc@cv.net>
Message-ID: <69nptfF318ps2U1@mid.uni-berlin.de>

> 
> OP: "I am wondering if python can do some kernel coding that
> used to be the private garden of C/C++."

"kernel coding" is pretty clear I'd say - coding a or in the kernel. Not 
coding that runs on an OS that happens to have a kernel.

> The answer is yes.  IPC and py-pf are examples.  If you don't think of 
> packet filtering as kernel coding, I can understand.  But clearly the 
> Python interfaces to fork(), waitpid(), signal(), alarm() and so forth 
> are forays into the once private garden of C.

Also not "kernel coding" in my book. system-near coding - yes. But not 
coding a kernel...

Diez


From omirek10 at poczta.onet.pl  Mon May 12 09:54:41 2008
From: omirek10 at poczta.onet.pl (Odys)
Date: Mon, 12 May 2008 06:54:41 -0700 (PDT)
Subject: execfile python3k
Message-ID: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>

Hi there,

Since execfile() is removed in Python 3.0
I have question about using exec.

I know about
  exec(open('filename').read())
but from documentation the 1st arg of exec can be 'file object'.
However
   exec(open('filename'))
does not work.
Does anybody have idea how to construct 'file object' then?

Thanks,


From see.signature at no.spam  Fri May  2 04:53:08 2008
From: see.signature at no.spam (Eric Brunel)
Date: Fri, 02 May 2008 10:53:08 +0200
Subject: Simple TK Question - refreshing the canvas when not in focus
References: <16d36d38-43fe-4863-8df7-02c60c18600c@j22g2000hsf.googlegroups.com>
	<4818349e$0$2959$ba620e4c@news.skynet.be>
	<op.uaffxfkswepdt4@ericb.pragmadev>
	<182ace66-bdf6-409c-85ee-fd764de8e1c6@z72g2000hsb.googlegroups.com>
	<fva0ds$8iv$01$1@news.t-online.com>
	<8fbf2b85-1b6a-4f6c-a84e-934609fd0e4e@c58g2000hsc.googlegroups.com>
Message-ID: <op.uaiqyufywepdt4@ericb.pragmadev>

On Wed, 30 Apr 2008 20:19:32 +0200, blaine <frikker at gmail.com> wrote:

> On Apr 30, 10:41 am, Peter Otten <__pete... at web.de> wrote:
>> blaine wrote:
>> > Still doesn't work.  I'm looking into using wx instead...
>>
>> > This is the full code - does it work for anyone else? Just do a echo
>> > 'line 0 0 10 10' > dev.file
>>
>> Haven't tried it, but I think that the problem is that you are updating  
>> the
>> UI from the "readthread". A good example to model your app after is  
>> here:
>>
>> http://effbot.org/zone/tkinter-threads.htm
>>
>> Peter
>
> Update: Not only is that a good model, its exactly what I'm trying to
> do.  Thanks again!

BTW, instead of reading the queue periodically, you can also use the event  
loop for that: in the secondary thread, generate a custom event using the  
event_generate method. Custom events are enclosed in '<<...>>', the '...'  
can be whatever you like. Be sure to generate the event with the  
when='tail' option or the event might get handled immediatly. To treat the  
event, do a binding on it: it will be called in your main thread. It's a  
common trick to switch threads so that GUI events are treated in the main  
thread and not in secondary ones.

Example:

------------------------------------------
import threading
import time
import Queue
 from Tkinter import *

root = Tk()

q = Queue.Queue()

def thread_action():
   i = 1
   while 1:
     time.sleep(1)
     q.put(i)
     root.event_generate('<<Ping>>', when='tail')
     i += 1

v = StringVar()

def ping_received(event):
   v.set(q.get())

Label(root, textvariable=v, width=10).pack()
root.bind('<<Ping>>', ping_received)

th = threading.Thread(target=thread_action)
th.setDaemon(1)
th.start()

root.mainloop()
------------------------------------------

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From scuteezgb at gmail.com  Fri May  9 10:06:49 2008
From: scuteezgb at gmail.com (gbin,Zhou)
Date: Fri, 9 May 2008 07:06:49 -0700 (PDT)
Subject: Can I "delete" the namespace of a module that i import?
Message-ID: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>

Hi,all.
   I see from "http://docs.python.org/tut/node11.html" that "Name
spaces are created at different moments and have different lifetimes.
The namespace containing the built-in names is created when the Python
interpreter starts up, and is never deleted. The global namespace for
a module is created when the module definition is read in; normally,
module namespaces also last until the interpreter quits."
   So can I "delete" the namespace of a module that i import?
   thanks.


From notbob at nothome.com  Wed May 21 17:57:00 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:57:00 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
Message-ID: <MU0Zj.975$5H6.622@fe107.usenetserver.com>

On 2008-05-21, Damon Getsman <dgetsman at amirehab.net> wrote:

> My suggestion, if you want to keep that gray meat sparking, is to go
> with only html & php.  You could have the php dumping your entries
> into date/time named textfiles on there when you're writing, and when
> someone is reading, it just orders them sequentially by the date &
> time in their filenames.
>
> Then again, you learn the HTML+PHP+MySQL thing and you've got a skill
> that you can market on Craigslist to a bunch of people for $20/hr
> +.  :)

That certainly couldn't hurt.  Thank you for your advice.

nb


From jon at ffconsultancy.com  Thu May 15 13:00:35 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 15 May 2008 18:00:35 +0100
Subject: generate all possible math expr of one term
References: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
Message-ID: <yOqdnWePY_XV8LHVRVnygQA@posted.plusnet>

xahlee at gmail.com wrote:
> Here's a example of Expressiveness of a Language.
> 
> The following is Mathematica code that generates all possible
> equations of one term involving trig function. (tweak the funList and
> nesting level to define what ?all possible? means. if nesting level is
> 2, it takes about 20 minutes and returns a list of 2876 terms on a
> 2004 personal computer.
> 
> << DiscreteMath`Combinatorica`
> funList = {Sin, Tan, Power[#, -1] &};
> Nest[Module[{li = #},
>  (Union[#, SameTest -> (Module[{arg1 = #1, arg2 = #2},
>    If[(*both expression contains both x and y*)
>      And @@ (((((StringMatchQ[#, "*x*"] &&
>      StringMatchQ[#, "*y*"]) &)@
>      ToString@#) &) /@ {arg1, arg2})
>      , SameQ[arg1, arg2 /. {x -> y, y -> x}],
>      SameQ[arg1, arg2]]
>    ] &)] &)@
>    Union at Flatten@(Table[(Times @@ # &) /@ KSubsets[#, i], {i, 1,
>    2}] &)@Flatten@{li, Outer[#1@#2 &, funList, li]}
>  ] &, {x, y}, 1];
> Select[%, (StringMatchQ[ToString@#, "*x*"] &&
>  StringMatchQ[ToString@#, "*y*"]) &]

This does not even start running in Mathematica 6, let alone produce any
correct results. The first line was deprecated some time ago. I don't know
what is wrong with the rest of your program but it takes a while to produce
the empty list.

> The problem is this: generate a list of all possible math expressions
> using the following combination and rules:
> 
> ? the math expression involves both x and y. (must have both present)
> ? you can use any of the 6 trig functions (you must, since the goal is
> to create all possibilities)
> ? The binary operations you can use are multiply, divide. (no addition
> or substraction, since that can make the result 2 terms)
> ? a sub-expression (such as x or y) can be replaced by a more
> complicated one. (i.e. you can nest)

Then your program should produce an infinite number of terms, e.g. x,
Sin[x], Sin[Sin[x]], ...

> The above i wrote in 2002. If there are requests, i'll translate the
> above code into emacs lisp.

A correct definition of what the program is supposed to do with a correct
implementation in any language would be a good start.

If you are trying to do what I think you are trying to do then this is a
trivial recursive definition in just about any language and it does not
take advantage of anything specific to Mathematica anyway.

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From msc at es.aau.dk  Mon May 19 04:17:03 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Mon, 19 May 2008 10:17:03 +0200
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<3xUXj.11305$hv2.9481@bignews5.bellsouth.net>
Message-ID: <wdwiqxapv28.fsf@msc-dt.kom.auc.dk>

>>>>> "inhahe" == inhahe  <inhahe at gmail.com> writes:
inhahe> Btw, use float() to convert a textual GPA to a number.

It would be much better to use Decimal() instead of float(). A GPA of
3.6000000000000001 probably doesn't make much sense; this problem
doesn't arise when using the Decimal type.

Martin


From gherron at islandtraining.com  Thu May 15 16:46:06 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 13:46:06 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
Message-ID: <482CA10E.1040602@islandtraining.com>

Marlin Rowley wrote:
> Gary,
>
> I'm getting streaming tile data from a renderer in order to allow the 
> user to see the rendering of tiles in real-time to create the total 
> image.  I'm NOT reading an entire image scanline-by-scanline.  The 
> renderer streams in a series of floats (for each tile) and I build 
> this tile up from each individual color component passed in.  I then 
> convert it to a small bitmap and blit() it to the window that will 
> eventually make up my entire image.  I'm just wanting to make the 
> process as fast as the renderer can render the tiles.  I've noticed on 
> scenes that aren't very complex for the renderer that my python script 
> is spending most of it's time drawing while the renderer is already 
> done.  What you've given me has sped up the drawing a lot, but I'm 
> hungry for more optimization!
>
> There is no file format to be read.  The data is raw bytes and can be 
> any format.

You are misinterpreting what I mean by a format.  All data is a string 
of bytes, and interpreting that string of bytes to have some particular 
form is applying a format to it.    Your particular format is: each 4 
bytes represents a float, and a string of such floats give the RGBA 
values for a rectangle (of some size) of pixels.  I doubt that you are 
the first ever to use that particular format to encode an image, but I 
also don't believe it matches any of the standard image formats.

So... There is still hope to use already written tools to decode your 
format. 

Here's a hint on how to use numpy for decoding a byte string into an 
array of floats.  My example byte string is a hand coded string of just 
12 bytes -- you should replace that with a whole row or better yet, a 
whole tile's worth of bytes.

 >>> import numpy
 >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'
 >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)
 >>> b
array([ 1.,  2.,  3.], dtype=float32)


If you want to use the array module instead:

 >>> import array
 >>> a = array.array('f')
 >>> a.fromstring(byteString)
 >>> a
array('f', [1.0, 2.0, 3.0])


In either case ANY number of bytes can be decoded into an array of 
floats, in one highly efficient call from Python.

What you do with that array of float afterwards is up to you....

If I read your note correctly, here's what I'd do to turn the array of 
bytes into an image of a tile to be displayed on the screen.

  Get the whole tile's worth of bytes with one read into a single string.
  Decode that string into an array of floats (as above).
  Reshape the array into a 3D array (i.e., a rectangular array of RGBA 
values)
  Convert that array of floats into an array of 8-bit integers (scaling 
all by 255).
  Extract (via tostring) that array into a string of bytes.
  Send that string of bytes to the graphics system as an RGBA array of 
pixels.

Each of these calls is one Python call into a highly efficient library.  
This is using Python as a, so called, glue language. 

Gary Herron







>
> > Date: Thu, 15 May 2008 10:09:45 -0700
> > From: gherron at islandtraining.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > John Machin wrote:
> > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> > >
> > >> Marlin Rowley wrote:
> > >>
> > >>> All:
> > >>>
> > >>> I've got a script that runs really slow because I'm reading from a
> > >>> stream a byte at a time:
> > >>>
> > >>> // TERRIBLE
> > >>> for y in range( height ):
> > >>> for color in range(4):
> > >>> for x in range( width ):
> > >>> pixelComponent = fileIO.read(4)
> > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE
> > >>>
> > >
> > > [snip]
> > > Perhaps the OP might be able to use the Python Imaging Library (PIL)
> > > instead of reinventing an image-file handler.
> > >
> >
> > Indeed. That's why my original answer included the line:
> > There are probably better ways overall, but this directly answers
> > your question.
> >
> > Other possibilities.
> >
> > I don't recognize the file format being read in here, but if it is a
> > standard image format, the PIL suggestion is a good way to go.
> >
> > Or, if it is an image of not too enormous size, read the *whole* thing
> > in at once.
> >
> > Or rather than manipulate the array by carving off 4 bytes at a time,
> > just index through it in 4 byte chunks:
> > for i in range(width):
> > buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> >
> > Or
> > for i in range(0,4*width,4):
> > buffer = unpack("!f", pixelComponent[i:i+4])
> >
> > Or
> > Use numpy. Create an array of floats, and initialize it with the byte
> > string, making sure to take endianess int account. (I'm quite sure this
> > could be made to work, and then the whole operation is enormously fast
> > with only several lines of Python code and *no* Python loops.
> >
> > Or
> > ...?
> >
> > Gary Herron
> >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> ------------------------------------------------------------------------
> Windows Live SkyDrive lets you share files with faraway friends. Start 
> sharing. 
> <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From gherron at islandtraining.com  Thu May 15 15:24:15 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 12:24:15 -0700
Subject: Pass data from Python to C++
In-Reply-To: <g0hrq3$rfb$1@solaris.cc.vt.edu>
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <482C8DDF.7070306@islandtraining.com>

brad wrote:
> I have some c++ binaries that do rather intense number computations. 
> They do it well and rather quickly compared to other languages (not 
> just Python). An example:
>
>> brad at qu:~/$ date && ./compute.cpp.o < 1_million.txt > /dev/null && date
>> Thu May 15 13:08:28 EDT 2008
>> Thu May 15 13:08:31 EDT 2008
>> brad at qu:~/$ date && python compute.py < 1_million.txt > /dev/null && 
>> date
>> Thu May 15 13:08:38 EDT 2008
>> Thu May 15 13:14:50 EDT 2008
>
> In this case, c++ does one million things in 3 seconds that Python 
> takes more than 6 minutes to do. The one million is a minimum. At 
> times the computations are in the billions. This is why c++ was chosen.
>
> However, other components can be written in a more user friendly, more 
> easily maintained language. We've chosen Python for this. The main 
> question now is how to pass the computationally heavy info to c++ from 
> within Pyhton. os.system is not ideal. Just wondering how other folks 
> do this? I have source to some of the c++ code, but some of it is in 
> binary from only. It can take stdin or arguments.
>
> Thanks for any tips,
>
> Brad
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list


There are lots of ways to do this.    Lots of the modules you use are 
written in C and callable from Python. (Including sys, os, socket, PIL, 
numpy, all graphics and GUI modules, ...)  And that's exactly what you 
want here -- a module that you can import into Python which gives you 
the ability to make calls into your C++ code.   This is often called 
*wrapping* your C++ library.

This is no small task, and it depends heavily on the size/complexity of 
the API you wish to wrap, and whether it's C (easier) or C++(harder).   
However, there are *lots* of tools to help.  I'd start by looking here:
  http://wiki.python.org/moin/AdvocacyWritingTasks/GlueLanguage

Good luck,

Gary Herron




From bronger at physik.rwth-aachen.de  Thu May  1 17:03:38 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 23:03:38 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru>
Message-ID: <878wytvis5.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> [...]
>
> I took the example from
> http://www.kuro5hin.org/story/2004/10/29/14225/062 I haven't use
> my own example only because I don't have one at hand right
> now. YAML, in its simple form, definetely makes me more
> productive. I wasted too much time with XML in the past and I
> won't ever use it as a serialization or config/settings format
> again. .INI/ConfigParser is too limited and has no standards. I
> just don't see anything better than YAML to do human and Python
> editable config files and to serialize information for later use.

Okay, but serialisation is something completely different.  Nobody
would use INI files for it.

For other things, it simply depends on the use case.  For example, I
*know* that the configuration files of my pet project will not
exceed the dumb section.key=value scheme so anything else would be
overkill.

Besides, YAML adds another dependency.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From kyosohma at gmail.com  Tue May 13 14:17:04 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 11:17:04 -0700 (PDT)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <835cca6a-dc35-44fa-a72e-7365e7a0bfb2@y21g2000hsf.googlegroups.com>

On May 13, 1:02?pm, hdante <hda... at gmail.com> wrote:
> Hello,
>
> ?How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server). Do you recommend doing so ?
>
> ?What's your prefered news reader ?

You can use Gmane or Nabble or you could subscribe to c.l.py as a
mailing list here:

http://mail.python.org/mailman/listinfo/python-list

Mike


From marlin_rowley at hotmail.com  Thu May 15 12:53:32 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:53:32 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C6A0A.8080308@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<482C60AB.2060406@islandtraining.com>
	<BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
	<482C6A0A.8080308@islandtraining.com>
Message-ID: <BAY135-W307E513765910B818E0CF39FC90@phx.gbl>

Sorry Gary,
 
I found out that I wasn't reassigning the array back once I got the first 4 bytes.  I don't mean to appear lazy..:(
 
Thanks for the help!
 
-M



> Date: Thu, 15 May 2008 09:51:22 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > Thanks for the advice!> > > > However, I assumed that:> > > > fourbytes = pixelComponent[:4]> > > > would shave that byte off the array in pixelComponent. So that the > > array is smaller by one on the next iteration. Is this not the case?> You don't need the newsgroup to answer this kind of question. Just try it!> > >>> a = 'abcdefghi'> >>> b = a[:4]> >>> print a,b> abcdefghi abcd> > Notice that the [:4] index does not change the original array.> > Gary Herron> > > > > > > I'm getting weird results now..> > > > -M> >> >> >> >> > ------------------------------------------------------------------------> >> > > Date: Thu, 15 May 2008 09:11:23 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com> > > CC: python-list at python.org> > > Subject: Re: How do I use the unpack function?> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > I've got a script that runs really slow because I'm reading from a> > > > stream a byte at a time:> > > >> > > > // TERRIBLE> > > > for y in range( height ):> > > > for color in range(4):> > > > for x in range( width ):> > > > pixelComponent = fileIO.read(4)> > > > buffer = unpack("!f",pixelComponent) << unpacks ONE> > > > float, but we now can do something with that pixel component.> > > >> > > >> > > > I can speed this up dramatically if I did this:> > > >> > > > // MUCH FASTER> > > > for y in range( height ):> > > > for color in range(4):> > > > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more> > > > data from the stream into memory FIRST!!> > > > for x in range( width ):> > > > buffer = unpack( ?????? ) <<<< how do I get each float from> > > > the pixelComponent???> > >> > > Just carve of the first four bytes of pixelComponent on each pass> > > through the loop, and unpack that.> > >> > > for x in range(width):> > > fourbytes = pixelComponent[:4] # first 4 bytes> > > pixelComponent = pixelComponent[4:] # All but first four bytes> > > buffer = unpack("!f", fourbytes)> > >> > >> > > There are probably better ways overall, but this directly answers your> > > question.> > >> > > Gary Herron> > >> > >> > > >> > > >> > > > -M> > > > > > ------------------------------------------------------------------------> > > > With Windows Live for mobile, your contacts travel with you. Connect> > > > on the go.> > > > > > <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it > > out! > > <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
With Windows Live for mobile, your contacts travel with you.
http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008
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From deets at nospam.web.de  Thu May 29 05:26:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 11:26:25 +0200
Subject: cmd.Cmd bug or at least docu-bug
Message-ID: <6a7b72F3467inU1@mid.uni-berlin.de>

Hi,

I'm fiddling around with module cmd. I tried to pass my own streams as
replacements for stdin and stdout. However, stdin wasn't working. After a
look into the sourcecode I discovered that there is an class-variable
called 

use_rawinput

that prevents using the passed stdin. I then read the docs again - and found
it described. However, I think it should be mentioned on the first page
where the constructor is described that without setting use_rawinput to
False, stdin will be ignored.

Or even better either make use_rawinput set to false in case stdin is passed
anything but None or at least make it a keyword argument.

Any thoughts about this?

Diez


From robert.kern at gmail.com  Thu May  1 17:45:51 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 01 May 2008 16:45:51 -0500
Subject: Getting started with pyvtk
In-Reply-To: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
Message-ID: <fvddmf$id$1@ger.gmane.org>

Peter Pearson wrote:
> I'm trying to get started with pyvtk, the Python interface
> to the Visualization Toolkit, but there's obviously
> something important that I haven't figured out after an
> embarrassingly long morning of googling around.  When I run
> sample pyvtk code (example1.py, from
> http://cens.ioc.ee/cgi-bin/viewcvs.cgi/python/pyvtk/examples/example1.py),
> nothing graphical happens, but some text files appear named
> example1.vtk and example1b.vtk.  Guessing that I need to
> feed one of these to vtk, I tried "vtk <example1.vtk" and
> "vtk example1.vtk", but those result in (different) error
> messages that I think mean example1.vtk is not the language
> that vtk expects.  Simply running "vtk" (apparently 4.0)
> gets a prompt that has no help command, and "man vtk" just
> tells me it's like "wish", and "man wish" doesn't address
> what to do with a vtk file.
> 
> What key piece am I missing?

pyvtk is not the Python interface to VTK. It is for the creation of VTK files. 
The vtk(1) command is a Tcl shell with the VTK libraries loaded (I believe). 
Read the VTK documentation for information on the Tcl interface if you really 
want to use it. The Python interface is also included in the VTK sources, 
although it might not have been built on your machine. You have to enable it 
when you build VTK itself. The Python interface is essentially the same as the 
C++ interface. There are Python examples in the VTK source tree.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From aisaac at american.edu  Thu May 29 18:05:49 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 22:05:49 GMT
Subject: make a string a list
In-Reply-To: <g1n7an$1dr$1@registered.motzarella.org>
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <1NF%j.9238$u7.4650@trnddc07>

Nikhil wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made 
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position. 

Why dont the ``find`` or ``index`` methods work for you?
http://docs.python.org/lib/string-methods.html

Cheers,
Alan Isaac


From info at wingware.com  Thu May 22 08:56:18 2008
From: info at wingware.com (Wingware)
Date: Thu, 22 May 2008 08:56:18 -0400
Subject: ANN: Wing IDE 3.1.1 released
Message-ID: <48356D72.1060509@wingware.com>

Hi,

Wingware has released version 3.1.1 of Wing IDE.  This bug fix release is
available for all three product levels of Wing IDE.

*Release Highlights*

This release includes the following:

* Template tool properly supports 2nd+ like-named fields
* Several VI mode improvements
* Replace in selection fixes
* Maintain caret position when auto-strip trailing white space
* Avoid trying to use unsupported Python versions
* About 20 other bug fixes: see the change log for details:
   http://wingware.com/pub/wingide/3.1.1/CHANGELOG.txt

*Downloads*

Wing IDE Professional and Wing IDE Personal are commercial software and
require a license to run. A free trial license can be obtained directly from
the product when launched.

Wing IDE Pro 3.1.1         http://wingware.com/downloads/wingide/3.1

Wing IDE Personal 3.1.1    http://wingware.com/downloads/wingide-personal/3.1

Wing IDE 101 3.1.1         http://wingware.com/downloads/wingide-101/3.1

*About Wing IDE*

Wing IDE is an integrated development environment for the Python programming
language.  It provides powerful debugging, editing, code intelligence,
testing, and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Wing IDE is available in three product levels:  Wing IDE Professional is
the full-featured Python IDE, Wing IDE Personal offers a reduced feature
set at a low price, and Wing IDE 101 is a free simplified version designed
for teaching entry level programming courses with Python.

System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or
Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit).
Wing IDE 3.1 supports Python versions 2.0.x through 2.5.x.

*New Features in Wing 3.1*

This release adds the following features not found in Wing 3.0.x:

* Support for zip archives
* Support for pkg_resources name spaces and eggs
* Support for doctest and nose style unit tests (*)
* Scan for sys.path changes such as those used in buildout
* How-To and support for Google App Engine
* Inline context appropriate templates/snippets integrated with autocompleter (*)
* Word list driven auto-completion in non-Python files (**)
* Quick navigation to files and symbols by typing a fragment (**)
* Improved support for Stackless Python
* Preference to strip trailing white space on save
* Display gi_running and gi_frame for generators
* Improved code analysis for Python 2.5
* Other minor features and bug fixes not found in Wing 3.0.x

(*)'d items are available in Wing IDE Professional only.
(**)'d items are available in Wing IDE Personal or Professional only.

Please see the change log for a detailed list of changes:
http://wingware.com/pub/wingide/3.1.1/CHANGELOG.txt

*Purchasing and Upgrading*

Wing 3.1 is a free upgrade for all Wing IDE 3.0 users. Any 2.x license sold
after May 2nd 2006 is free to upgrade; others cost 1/2 the normal price to
upgrade.

Upgrade a 2.x license:    https://wingware.com/store/upgrade

Purchase a 3.x license:   https://wingware.com/store/purchase

-- 

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com




From lists at cheimes.de  Fri May  2 05:59:33 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 11:59:33 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <481AE22E.3040906@shopzeus.com>
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
Message-ID: <481AE605.50102@cheimes.de>

Laszlo Nagy schrieb:
> For sensitive resources, instead of writing __del__ methods, you should
> create a "close()" method. Python does this with file objects, DB API
> 2.0 with database connection objects etc. Then you can do
> 
> res = create_resource()
> try:
>    use_resource()
> finally:
>    res.close() # Must free resource, but the object can still be alive...

You can replace the try/finally code with a "with resource:
do_something()" block if the object supporst the context manager protocol.

If you want to run some code during the shutdown phase of the Python
process you can register a callback function in the "atexit" module.

> It is more common to use signals when you have more threads or child
> processes. You can use something like:

Do NOT mix threads and signals. It's usually a very bad idea and may
lead to surprising side effects. Signals are only handled by the main
thread.

Christian


From castironpi at gmail.com  Sun May 11 01:15:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 22:15:49 -0700 (PDT)
Subject: People still using Tkinter?
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net> 
	<mailman.906.1210435115.12834.python-list@python.org>
	<4825cd01$0$14982$9b622d9e@news.freenet.de> 
	<mailman.913.1210445877.12834.python-list@python.org>
Message-ID: <c5eb0d63-357b-40f2-a2ec-10db6736ab2b@l64g2000hse.googlegroups.com>

On May 10, 1:57?pm, Kenneth McDonald
<kenneth.m.mcdon... at sbcglobal.net> wrote:
> The only trick it that sometimes it isn't obvious how to make the Tcl/
> Tk call via Python.
>
> Ken
>
> On May 10, 2008, at 11:27 AM, Martin v. L?wis wrote:
>
>
>
> >> I am, but "still" isn't the word, I just started. ?Good, *complete*
> >> docs seem to be hard to find, but using a combination of the free
> >> resources and going back and forth between them seems to work all
> >> right so far.
>
> > IMO, the trick really is to also have a Tk documentation around.
> > If you need to find out what option is supported by what widget,
> > there isn't really much point in duplicating that information in
> > Tkinter, IMO - the Tk documentation has it all.
>
> > Regards,
> > Martin
> > --
> >http://mail.python.org/mailman/listinfo/python-list- Hide quoted text -
>
> - Show quoted text -

A limited browser-set

from browserset remove imported.sys.modules[ '__main__' ]

which should be a snytactically consistent expression.

or,

from imported.sys.modules[ '__main__' ] remove browserset

Could make tkinter-complexity applications for browsers.

Argue it's sufficiently general to spend a dollar on.


From rhamph at gmail.com  Tue May  6 11:56:31 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Tue, 6 May 2008 08:56:31 -0700 (PDT)
Subject: Decimal vs Float comparasion
References: <mailman.625.1210045932.12834.python-list@python.org> 
	<H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
Message-ID: <ff51d495-bd21-45cf-be32-f7709619599e@w1g2000prd.googlegroups.com>

On May 6, 1:31 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 6 May 2008 11:52:10 +0800, "Yuan HOng" <hongyuan1... at gmail.com>
> declaimed the following in comp.lang.python:
>
>
>
> > It seems to me that rather than allowing this to happen, comparasion
> > between the two should either be made correct (by convertion decimal
> > to float e.g.) or forbidden, like arithmatic operations between the
> > two types.
>
>         Why should decimal be coerced to float? Maybe float should be
> coerced to decimal?
>
>         Or... the programmer should explicitly specify what comparison is
> wanted -- if any...
>
>         Or... Isn't Python 3.x supposed to forbid mixed type comparisons
> unless the types implement suitable handling?

Yes, it is fixed in 3.0.  Unfortunately it's well established
behaviour in 2.x, so it won't be changing there.  Don't bother
reporting a bug about this unless it's about 3.0.


From gregturn at mindspring.com  Fri May 30 15:00:48 2008
From: gregturn at mindspring.com (Goldfish)
Date: Fri, 30 May 2008 12:00:48 -0700 (PDT)
Subject: Spring Python version 0.5.0 is released
Message-ID: <b560b7a1-2e04-426a-b433-a897e7642405@x41g2000hsb.googlegroups.com>

Spring Python (http://springpython.webfactional.com) version 0.5.0 was
released today.

It contains updates to DatabaseTemplate and DatabaseTransactions,
along with more testing underneath MySQL, PostGreSQL, and Sqlite.
Support for Oracle has been added, but only minimally tested so far.

Spring Python has been re-licensed underneath the Apache License 2.0,
making it more business friendly.

Greg


From squareswallower at 1ya2hoo3.net  Thu May  8 01:42:07 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Wed, 7 May 2008 23:42:07 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
Message-ID: <fvu3rf$je4$1@news.xmission.com>

This is what i've came up with.  My problem is that I can't get them to 
properly evaluate.. when  comparewords() runs it finds itself...  
Should I have the keys of mapdict iterate over itself?  Is that 
possible?

def annafind():
	fin = open('text.txt')		# file has one word per line
	mapdic = {}			# each word gets sorted & goes in here
	for line in fin:
		rawword = line.strip()
		word = list(rawword)
		word.sort()
		mapdic[''.join(word)] = 0
	return mapdic


def comparewords(): ***not working as intended
	fin = open('text.txt')
	for line in fin:
		line = line.strip()
		word = list(line)
		word.sort()
		sortedword = (''.join(word))
		if sortedword in mapdic:
			print line




On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com> said:

> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>
> wrote:
> 
>> Hi All,
>> 
>> I wrote a program that takes a string sequence and finds all the words
> 
>> inside a text file (one word per line) and prints them:
>> 
>> def anagfind(letters): 	#find anagrams of these letters
>> 	fin = open('text.txt')	#one word per line file
>> 	wordbox = []		 #this is where the words will go
>> 	for line in fin:
>> 		word = line.strip()
>> 		count = 0
>> 		for char in letters:
>> 			if char not in word:
>> 				break
>> 			else:
>> 				count += 1
>> 			if count == len(word):
>> 				wordbox.append(word)
>> 	return wordbox
>> 
>> Now I'd like to modify the code to naturally find all anagrams inside
> a
>> wordlist.  What would be the best way to do this?  Using Hints?  Is it
> 
>> possible to iterate over dict keys?  How can I make a dict that maps
> 
>> from a set of letters to a list of words that are spelled from those
> 
>> letters?  Wouldn't I need to make the set of letters a key in a dict?
>> 
>> As always - Thanks for helping someone trying to learn...
>> 
>> Dave
>> 
> 
> Suggestion: for each word, sort their characters and use them as the
> dictionary key.  If two words have the same combination of characters,
> then they are anagrams.  For example: "edam" and "made" are anagrams
> because they have the letters 'a', 'd', 'e' and 'm'.
> 
> Refer "Programming Pearls" by Jon Bentley.
> 
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</ a>




From zerty.david at gmail.com  Thu May  8 21:44:39 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 22:44:39 -0300
Subject: Weird bug with an integer
Message-ID: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>

Look this slice of code:

rowN = int(0)
        for row in rows:
            success = self.resultGrid.AppendRows();
            colN = int(0)
            for col in row:
                self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
- 1,colN,isReadOnly = True)
                print rowN
                self.resultGrid.SetCellValue(int(rowN),int(colN),col)

I am getting this output:
0
0
0
0
0
0
0
(1,)
Traceback (most recent call last):
     in populateGrid
    self.resultGrid.SetCellValue(int(rowN),int(colN),col)
TypeError: int() argument must be a string or a number, not 'tuple'


Why is this happening?
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From workitharder at gmail.com  Wed May 21 20:56:38 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:56:38 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com> 
	<4834C05D.6020608@gmail.com>
Message-ID: <0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>

On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
> bukzor wrote:
> > On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> >> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>
> >>> what are the simple ways?
> >>> I could think of os.open(), os.exec(touch file)
> >>> are there any simpler methods?
> >> Just use os.path.exists to check for file existence and open() as
> >> replacement for touch.
>
> >>>>> import os
> >>>>> if not os.path.exists('file'):
> >> ...     open('file', 'w').close()
> >> ...
>
> >> --- Giampaolohttp://code.google.com/p/pyftpdlib/
>
> > As simple as it gets is a single builtin function call:
>
> > open("somefile.txt", "a")
>
> > Leave out the ,"a" if you don't mind blanking a pre-existing file.
>
> Thanks :-)
>
> That reminds me to check if I could quickly nullify a file if it exists
>
> if os.path.exists('file'):
>         open('file', 'w').close()
>
> Right?

You only want to blank it if it exists? If it doesn't exist you won't
create it.
The .close() is superlative: since you don't keep the value, it gets
deallocated and closed by the destructor.


From johnjsal at NOSPAMgmail.com  Mon May 12 13:27:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 12 May 2008 13:27:57 -0400
Subject: Learning Python for no reason
Message-ID: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>

Just something that crosses my mind every time I delve into "Learning 
Python" each night. Does anyone see any value in learning Python when you 
don't need to for school, work, or any other reason? I mean, sure, there's 
value in learning anything at any time, but for something like a programming 
language, I can't help but feel that I will be mostly unable to use what I 
learn simply because I have no reason to use it.

The *process* of learning is enough fun for me, and every now and then I do 
find a small use for Python that really pays off, but for the most part I'm 
wondering what people's thoughts are as far as simply learning it for the 
sake of learning. Does it seem like a silly endeavor to most people? Did 
anyone here learn a programming language when you didn't need to? If so, how 
much and in what capacity did you use it after you learned it?

Hopefully this question even makes sense! 




From jcd at sdf.lonestar.org  Sat May 24 19:21:01 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sat, 24 May 2008 19:21:01 -0400
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in  python coding?
In-Reply-To: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <1211671262.21932.44.camel@jcd-desktop>

On Sat, 2008-05-24 at 15:36 -0700, zxo102 wrote:
> Hi,
>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?
> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.
>    Thanks.
> 
> ouyang

A string is made up of a list of bytes, and when you use hexadecimal
character references, the \ and the x do not represent bytes on their
own, hence they cannot be manipulated as though they were individual
characters of the string.  The sequence \xNN is one byte, as a unit.  It
cannot be divided.  So if you try:

'\x%s" % 'ef'

you will get an error, because you are substituting a two-byte string
'ef', where in fact you only wanted to complete the one byte in
question.  \x can never be separated from the two hexadecimal digits
that follow it.  They must be treated as a unit.  To get the two-byte
string 'ef' converted to the one byte character '\xef', you have to find
a way to get the numerical value of ef, and create a character of that
value.  The first part is done as follows:

int('ef', 16)

which means "get the integer value of 'ef', where 'ef' is represented in
base 16.  In order to get the byte of hexadecimal numeric value 0xef,
you use the chr() function:

'\xef' == chr(int('ef', 16))

Or if you are working with unicode, use unichr() instead of chr().

If you always treat \xNN escape sequences as indivisible, you won't go
wrong.

Cheers,
Cliff



From gagsl-py2 at yahoo.com.ar  Tue May  6 00:16:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 01:16:10 -0300
Subject: threading: getting latest elements from list/dict
References: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
	<17d58cc40805050426w3282bb3eyc9c1831d1d37d705@mail.gmail.com>
Message-ID: <op.uapss8q1x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 08:26:45 -0300, Vaibhav.bhawsar  
<bhawsar.vaibhav at gmail.com> escribi?:

> Hello
> I have a thread updating a dictionary with new elements. How can I check  
> for
> new elements as they are inserted into the dictionary by the thread? In
> general is it safe to read a dictionary or a list while it is being  
> updated
> by a running thread? Does the dictionary or list have to be locked while
> reading?
> many questions! :)

Use a Queue object to communicate between threads. The language itself  
doesn't guarantee anything about atomicity.
You might put the new elements in a queue, and make the consumer update  
the dictionary instead of the producer.


-- 
Gabriel Genellina



From alex.m.gusarov at gmail.com  Tue May 27 07:50:36 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:50:36 +0700
Subject: graphical ide??
In-Reply-To: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
Message-ID: <ac6dcb3d0805270450u7861b679k5f80a4260829eee3@mail.gmail.com>

I tried Eric (on windows), but then decided in favour of Eclipse +
PyDev. It's really good combination and if you want to develop PyQt
apps, you can also install Qt Integration plugin to Eclipse, so you
will have all what you need for PyQt development, include form
designer and resource editor. PyQt + Eclipse Qt plugin distributed
under GPL.

--
Best regards, Alex Gusarov
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From castironpi at gmail.com  Tue May 13 06:26:11 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:26:11 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <feb2956d-7320-4e79-8e39-e4431ec32bea@24g2000hsh.googlegroups.com>

On May 13, 5:10?am, wxPytho... at gmail.com wrote:
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.
>
> How is with this issue in Python 3.0? Is it fixed? Does Python handle
> this things properly now?

Ooo.  Timing.  Good one.  <joins rip on 3.0>

Writer's other wanderings bring Microsoft Research.  Who talks to that
on a daily basis?


From metallourlante at gmail.com  Sat May 17 10:03:27 2008
From: metallourlante at gmail.com (Alex)
Date: Sat, 17 May 2008 07:03:27 -0700 (PDT)
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
	<262b4f46-f3d6-4a29-b7a6-91eb279d1f29@j22g2000hsf.googlegroups.com>
Message-ID: <334cc5e1-5f28-4f74-b316-7d30b194f4ab@8g2000hse.googlegroups.com>

On May 17, 2:23 pm, Jeff <jeffo... at gmail.com> wrote:
> Your worker threads wait around forever because there is no place for
> them to exit.  Queue.get() by default blocks until there is an item in
> the queue available.  You can do something like this to cause the
> worker to quit when the queue is empty.  Just make sure that you fill
> the queue before starting the worker threads.
>
> from Queue import Queue, Empty
>
> # in your worker
> while True:
>   try:
>     item = q.get(block=False)
>   except Empty:
>     break
>   do_something_with_item()
>   q.task_done()
>
> You can also use a condition variable and a lock or a semaphore to
> signal the worker threads that all work has completed.

Thanks a lot, it works!


Alex


From castironpi at gmail.com  Wed May 14 13:08:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:08:49 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
	<iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com> 
	<TSF*qAScs@news.chiark.greenend.org.uk>
Message-ID: <de66df5a-da64-4f34-b3b1-96bc355aca71@f63g2000hsf.googlegroups.com>

On May 14, 11:58?am, Matthew Woodcraft
<matth... at chiark.greenend.org.uk> wrote:
> I V ?<ivle... at gmail.com> wrote:
>
> > I hadn't heard of operator.truth before. Does it do anything different
> > from bool(x) ?
>
> Not really. It was occasionally useful before the bool type existed;
> now it's just a leftover.
>
> -M-

Now as for ints, I could see that going in to 8-by-8s and crosses.
Anyone for?


From jcd at sdf.lonestar.org  Thu May  8 16:36:44 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 16:36:44 -0400
Subject: Surprising difference in behavior between "import blah" and
	"from blah import thing"
In-Reply-To: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
Message-ID: <1210279004.12106.25.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 12:00 -0700, Eric Hanchrow wrote:
> (This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)
> 
> This seems so basic that I'm surprised that I didn't find anything
> about it in the FAQ.  (Yes, I am fairly new to Python.)
> 
> Here are three tiny files:
> 
> ==== mut.py ====
> 
>     import system
>     from system import thing
> 
>     def doit():
>         print "       thing is", thing
> 
>     def do_it_slightly_differently():
>         print "system.thing is", system.thing
> 
> ==== system.py ====
>     thing = "I am the original thing!!"
> 
> ==== test.py ====
>     import mut
>     mut.doit()
>     mut.do_it_slightly_differently()
>     import system
> 
>     system.thing = "The new improved thing"
>     mut.doit()
>     mut.do_it_slightly_differently()
> 
> When I run "python test.py", I see
> 
>            thing is I am the original thing!!
>     system.thing is I am the original thing!!
>            thing is I am the original thing!!
>     system.thing is The new improved thing
> 
> What surprises me is that the assignment to "system.thing" in test.py
> only seems to affect the use of "system.thing" in mut.py, and not
> affect the use of just plain "thing" in that same file.  I would have
> expected my assignment to have affected both, or perhaps neither.
> 
> I have no idea why these two differ.  Can someone explain?

It's the same reason as this:

>>> x=5
>>> y=x
>>> x
5
>>> y
5
>>> x=6
>>> x
6
>>> y
5
>>> 

Python "variables" are just names that point at objects.  When you
import, the imported module gets bound to a name.  When you use the an
assignment statement, you bind a new object to the name, but other names
bound to the object are not affected.  

So in your code, when you say 

>>> system.thing = "The new improved thing"

You rebind the name system.thing, but the object it was originally bound
to is unaffected.  Strings are immutable, so you couldn't change that
object if you tried.  thing is still bound to the original object.
Another feature of this behavior is as follows:
>>> x=5
>>> x is y
True
>>> x=5
>>> y=x
>>> x is y
True
>>> x=6
>>> x is y
False
>>> 

The "is" operator tells you that the two objects are the same object.
When you reassign one, it no longer points to the same object as the
other.  You would get the same behaviour in your code comparing
system.thing and thing.

Cheers,
Cliff




From lew at lewscanon.com  Thu May  8 06:52:22 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 08 May 2008 06:52:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
Message-ID: <oaGdnQFiu-v7Rr_VnZ2dnUVZ_qrinZ2d@comcast.com>

kodifik at eurogaran.com wrote:
>>          |   PLEASE DO NOT   |            :.:\:\:/:/:.:
>>          |  FEED THE TROLLS  |           :=.' -   - '.=:
> 
> I don't think Xah is trolling here (contrary to his/her habit)
> but posing an interesting matter of discussion.

Interesting is in the eye of the beholder.  After you'd read the same recycled 
crud from certain posters again and again, it because trollish spam.

-- 
Lew


From deets at nospam.web.de  Mon May 19 10:01:37 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 16:01:37 +0200
Subject: printing class __dict__
References: <691285ac-b506-4d9a-8a4c-9a7d53dc9438@b9g2000prh.googlegroups.com>
Message-ID: <69dfj3F32oohpU1@mid.uni-berlin.de>

piyush.subscription at gmail.com wrote:

> hi,
> i am a newbie. so bear wth me
> i wrote a program like this
> --
> class H(object):
>  def __init__( self):
>   self.data =10
>  def e ( self ):
>   pass
>  def f ( self ):
>   pass
> 
> class H1(H):
>     x2 = 11
>     def __init__(self):
>         self.x = 10
> 
> class details(object):
>     def data(self,className):
>         print classname.__dict__
>         print classname.__name__
>         print classname.__bases__
> 
> bc = details()
> bc.data(H1)
> 
> when i run it, i get error like this
> NameError: global name 'classname' is not defined
> 
> can't i pass 'class' like an 'object'?
> 
> any suggestions to access other classes details inside a class?

Python is case-sensitive. Now analyze your code.

Diez


From john106henry at hotmail.com  Tue May  6 22:07:30 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 6 May 2008 19:07:30 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
	<070fc7e3-3e51-40b2-a6f2-026d00f8fa2f@m73g2000hsh.googlegroups.com>
Message-ID: <84375e0d-fa3e-4d0f-9701-c0a9f0dd94cc@p39g2000prm.googlegroups.com>

On May 5, 11:04 am, jbarci... at gmail.com wrote:
> John, you are the man
>
> > during my search for perfection, I found Qooxdoo (http://qooxdoo.org/).
>
> > ...
>
> > I found QxTransformer (http://sites.google.com/a/qxtransformer.org/qxtransformer/Home) which is a
> > XSLT toolkit that creats XML code that invoke qooxdoo.
>
> Qooxdoo is indeed really impressive. But I read that YAHOO will serve
> the javascript files for you from their CDN when you use YUI, for
> free, and that's no peanuts, so I wonder, did you find anything at all
> like that that could be used with YUI?
>

Sorry but I don't know any of this.  I am pretty new to web
programming.

> I have evaluated XForms, Laszlo, Flex, ZK, ... but I have to say
> QxTransformer is the cleverest solution I have found so far (thanks to
> you). I love it.
>
> > I want Pythoncard.
>
> I feel with you
>

I have done quite a bit of work to improve things.  We are now
officially calling the project PyQooxCard.  See:

http://sites.google.com/a/qxtransformer.org/qxtransformer/Home

I put together my first app which took less than a day.  Not bad
because there are 36 screens, and over 100 data fields.  See:

http://epc.powersystemadvisors.com

3 cheers to PythonCard.


> Thanks!
> Jaime



From deets at nospam.web.de  Wed May 21 02:25:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 08:25:00 +0200
Subject: Processing in Python
In-Reply-To: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <69htifF319c5iU1@mid.uni-berlin.de>

Istvan Albert schrieb:
> On May 20, 6:13 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Salvatore DI DI0 schrieb:
>>
>>> Hello,
>>> The Processing Graphics language has been implemented in Javascript.
>> No, it hasn't. Processing is written in Java.
> 
> He meant it has been re-implemented in Javascript:
> 
> http://ejohn.org/blog/processingjs/

I even tried to google to be sure that my statement was true - but the 
terms are to generic :(

> The closest python based equivalent of Processing is NodeBox but it is
> a OS X product:
> 
> http://nodebox.net/code/index.php/Home

That *really* looks promising! Thanks for that link.


Diez


From guillermo.listas at googlemail.com  Mon May 12 12:19:00 2008
From: guillermo.listas at googlemail.com (Guillermo)
Date: Mon, 12 May 2008 09:19:00 -0700 (PDT)
Subject: passing *args "recursively"
Message-ID: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>


Hi,

This must be very basic, but how'd you pass the same *args several
levels deep?


def func2(*args)

    print args # ((1, 2, 3),)
    # i want this to output (1, 2, 3) as func1!
    # there must be some better way than args[0]?

def func1(*args):

    print args # (1, 2, 3)
    func2(args)

func1(1,2,3)

Thanks!

Guillermo


From seberino at spawar.navy.mil  Wed May  7 14:53:46 2008
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: Wed, 7 May 2008 11:53:46 -0700 (PDT)
Subject: Bad form to access a *private variable* like _foo?
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
	<48200a7f$0$23642$426a74cc@news.free.fr>
	<68aq4nF2r9b93U4@mid.uni-berlin.de>
Message-ID: <c6a99aff-43be-426c-b956-71b9942ba52d@u6g2000prc.googlegroups.com>

On May 6, 3:27 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> There are other ways. For example,
>
> sqlobject.sqlhub.threadingLocal.connection
>
> if your system is using multiple threads correctly. Generally speaking,
> sqlhub could/should be used.

That's actually quite involved.  You must first get a reference to a
PackageHub object, then invoke connectionToURI, etc.  lots of steps!

cs


From kerstin.viltersten at semcon.com  Tue May 27 04:54:36 2008
From: kerstin.viltersten at semcon.com (Giraffe)
Date: Tue, 27 May 2008 01:54:36 -0700 (PDT)
Subject: Problems with Python IDLE
Message-ID: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>

I have the followong class in a file:
--------------------------------------------
class someClass:
   def __init__ (self):
      self.someVar = 10

   def getSomeVar (self):
      return self.someVar
--------------------------------------------

In another file a do the following:
--------------------------------------------
tmp = someClass ()
tmp.getSomeVar ()
--------------------------------------------

I run the second file in the IDLE environment and everything seems to
be working fine until I start to modify in the first file:
--------------------------------------------
class someClass:
   def __init__ (self):
      self.someVar = 10

   def getSomeVar (self):
      print "Modified class!"
      return self.someVar
-------------------------------------------

When I now try to run the second file in the IDLE environment again, I
DO NOT get the newly added printout. I have saved and compiled (run)
both files but there is still no change. What have I missed?



From cheryl.giomi at comcast.net  Sat May 17 14:18:29 2008
From: cheryl.giomi at comcast.net (cher)
Date: Sat, 17 May 2008 11:18:29 -0700
Subject: smtplib "authentication required" error
References: 1143858027.337885.24650@j33g2000cwa.googlegroups.com
Message-ID: <482F2175.1070702@comcast.net>

Hey,

Don't know if you can help, but I'm trying to import archived messages 
from Thunderbird into my gmail account and keep getting these types of 
errors.  I am using the GML program to help incorporate, but the SMTP 
server is not being recognized by gmail.  Am I doing something wrong?  
Anything else I can try?
SMTP I've tried:
    smtp.gmail.com
    gsmtp56.google.com

Error Val : (530, '5.7.0 Must issue a STARTTLS command first. 
m29sm9416768poh.4',
*** 76 ERROR SENDING MESSAGE FROM: rick at bassisloadeddj.com
*** UNABLE TO CONNECT TO SERVER OR SEND MESSAGE. ERROR FOLLOWS.
Error Type: smtplib.SMTPSenderRefused
Error Val : (530, '5.7.0 Must issue a STARTTLS command first. 
n22sm9448670pof.3', 'rick at bassisloadeddj.com')

Thanks,
Cher




From mal at egenix.com  Thu May  8 12:08:28 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 08 May 2008 18:08:28 +0200
Subject: Writing elapsed time as a string
In-Reply-To: <op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <481B67E5.7040507@googlemail.com>
	<op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <4823257C.3070106@egenix.com>

On 2008-05-08 14:31, Gabriel Genellina wrote:
> En Fri, 02 May 2008 16:13:41 -0300, Simon Pickles <sipickles at googlemail.com> escribi?:
> 
>> I'm sorry if this has been asked a thousand (million) times.
>>
>> Is there a nifty pythonesque way to produce a string representing an
>> elapsed time period, in terms of years, months, days, hours, mins, seconds?
>>
>> I am storing times in a MySQL db, and would love to be able to write the
>> time elapsed between accesses of certain data. These are in seconds
>> since the epoch, as produced by time.time()

Using mxDateTime that's pretty easy (using number of days):

 >>> from mx.DateTime import *
 >>> delta = now() - Date(2000,1,1)
 >>> print delta
3050:18:01:25.91

or, if you'd rather like to see things broken down as relative
date/time diff (this is a calendar based diff):

 >>> print RelativeDateTimeDiff(now(), Date(2000,1,1))
(+0008)-(+04)-(+07) (+18):(+04):(+41)

i.e. 8 years, 4 months, 7 days, etc.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 08 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From rileyrgdev at gmail.com  Mon May 12 09:10:44 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Mon, 12 May 2008 15:10:44 +0200
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
Message-ID: <g09fko$hhl$3@registered.motzarella.org>

Yves Dorfsman <yves at zioup.com> writes:

> D'Arcy J.M. Cain wrote:
>> On Mon, 12 May 2008 02:28:13 GMT
>> Yves Dorfsman <yves at zioup.com> wrote:
>>> particular case, there's got to be a better way than:
>>>
>>> d = time.local()
>>> y = d[0]
>>> d = d[1]
>>
>> Like this?
>>
>>     y, d = time.local()[:2]
>
> Sorry this was a typo (again :-), I meant:
>
> d = time.local()
>   y = d[0]
>   d = d[2]
>
> Yves.
> http://www.SollerS.ca

or .localtime()? or is this local() specific to a different python
version?



From bruno.desthuilliers at gmail.com  Mon May  5 16:31:02 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 5 May 2008 13:31:02 -0700 (PDT)
Subject: Colors for Rows
References: <4dc0cfea0804290733ic99e45eyec23a6d5b719eb8@mail.gmail.com> 
	<mailman.332.1209485479.12834.python-list@python.org>
Message-ID: <55f7573f-bb55-483b-9e59-12f0469174a3@f63g2000hsf.googlegroups.com>

> On Tue, 29 Apr 2008 09:33:32 -0500
> "Victor Subervi" <victorsube... at gmail.com> wrote:

>   print '<tr bgcolor="%s">' % bg

<op>
<hs topic="html css">

You'd better learn to use css instead.

</hs>
</op>


From __peter__ at web.de  Tue May 27 06:01:31 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 May 2008 12:01:31 +0200
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
Message-ID: <g1gm5p$l5k$03$1@news.t-online.com>

Giraffe wrote:

> I have the followong class in a file:
> --------------------------------------------
> class someClass:
>    def __init__ (self):
>       self.someVar = 10
> 
>    def getSomeVar (self):
>       return self.someVar
> --------------------------------------------
> 
> In another file a do the following:
> --------------------------------------------
> tmp = someClass ()
> tmp.getSomeVar ()
> --------------------------------------------
> 
> I run the second file in the IDLE environment and everything seems to
> be working fine until I start to modify in the first file:
> --------------------------------------------
> class someClass:
>    def __init__ (self):
>       self.someVar = 10
> 
>    def getSomeVar (self):
>       print "Modified class!"
>       return self.someVar
> -------------------------------------------
> 
> When I now try to run the second file in the IDLE environment again, I
> DO NOT get the newly added printout. I have saved and compiled (run)
> both files but there is still no change. What have I missed?

You probably start idle with the -n option. If so, IDLE shows something like

IDLE 1.2.1      ==== No Subprocess ====

in its shell. Here's what IDLE's help says about that:

"""
Running without a subprocess:

        If IDLE is started with the -n command line switch it will run in a
        single process and will not create the subprocess which runs the RPC
        Python execution server.  This can be useful if Python cannot create
        the subprocess or the RPC socket interface on your platform.  However,
        in this mode user code is not isolated from IDLE itself.  Also, the
        environment is not restarted when Run/Run Module (F5) is selected.  If
        your code has been modified, you must reload() the affected modules and
        re-import any specific items (e.g. from foo import baz) if the changes
        are to take effect.  For these reasons, it is preferable to run IDLE
        with the default subprocess if at all possible.
"""

If you use a shortcut to start IDLE, remove the -n option and you should be
OK.

Peter


From dullrich at sprynet.com  Wed May 14 17:15:41 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 16:15:41 -0500
Subject: "indexed properties"...
Message-ID: <dullrich-12933F.16154114052008@text.giganews.com>

Having a hard time phrasing this in the form
of a question...

The other day I saw a thread where someone asked
about overrideable properties and nobody offered
the advice that properties are Bad. So maybe we've
got over that. I suppose properties could have 
Bad consequences if a user doesn't know they exist
and think that a certain property of an object is
just an ordinary attribute. But that applies to
almost any aspect of any language.

If a person comes from, say, Object Pascal (Delphi)
then properties are hard to live without. The
other day I decided I wanted what OP calls an
"indexed property" or "array property". Couldn't 
figure out how to make a _property_ behave that way.
So I read a little bit about descriptors, and a
few minutes later I had an indexedproperty thing
that works just like property, except it gives
an indexed property! This is just too cool.

Why? For example, a Matrix should have a row[n]
property allowing things like

m.row[0] = m.row[1] + m.row[2]

Ok, you could do _that_ by just making row
an ordinary list of Row objects. But then
you'd have to say

m.row[0] = Row([1,2,3])

where I want to be able to say

m.row[0] = [1,2,3]

and have the Row created automatically.

_Also_ with these indexed properties my Matrix
can have m.row[j] and m.col[k] that look exactly
the same to a client - we don't want to store a
list of rows internally and also store the same
data in a list of columns. Too cool.

Hmm, none of that's a valid excuse for a post here.
Um, right, here we go: Anyone see problems or
possible improvements with the implementation
of indexedproperty below?

"""indexed.py: "indexedproperty" works more or less
like "property" except it gives what in Object Pascal
would be an "indexed property". See the 
__name__="__main__" section below for a demo

"""

class WriteOnlyIP(Exception):
  def __str__(self): 
    return """

indexed property is write-only

"""

class ReadOnlyIP(Exception):
  def __str__(self):
    return """

indexed property is read-only

"""

class indexedproperty(object):
  def __init__(self, getitem=None, setitem=None):
    self.getitem = getitem
    self.setitem = setitem

  def __get__(self, obj, owner):
    self.obj = obj
    return self

  def __getitem__(self, index):
    if self.getitem:
      return self.getitem(self.obj, index)
    else:
      raise WriteOnlyIP

  def __setitem__(self, index, value):
    if self.setitem:
      self.setitem(self.obj, index, value)
    else:
      raise ReadOnlyIP


if __name__ == "__main__":

  class AClass(object):
    def __init__(self):
      self.cells = [[0,0], [0,0]]

    def SetCell(self, (row, col), value):
      self.cells[row][col] = value

    def GetCell(self, (row, col)):
      return self.cells[row][col]

    cell = indexedproperty(GetCell, SetCell)

  C = AClass()
  for row in range(2):
    for col in range(2):
      C.cell[row, col] = "row: %s, col: %s" % (row, col)

  for row in range(2):
    for col in range(2):
      print C.cell[row, col]

  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]

  print "After  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]:"

  for row in range(2):
    for col in range(2):
      print C.cell[row, col]

-- 
David C. Ullrich


From mensanator at aol.com  Fri May  9 00:50:17 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 21:50:17 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de> 
	<1210306536.4823cfe8be627@comuh.uh.cu>
	<mailman.835.1210307342.12834.python-list@python.org>
Message-ID: <4fcecd86-eb19-4443-b218-fc4cfcd4a36c@m3g2000hsc.googlegroups.com>

On May 8, 11:28?pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > ?Weird, I can't find neither... (which wikipedia article? Couldn't find one about
> > ?C99.)
>
> Tryhttp://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power

So it IS correct.


From upton at virginia.edu  Tue May 13 11:50:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 11:50:19 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <5504f9ac0805130850u395ce913le84d65d172c76069@mail.gmail.com>

On Tue, May 13, 2008 at 11:24 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> >  The "Flaming Thunder" looks promising, but without being free
>  > software, it's unlikely it will create a large developer community,
>  > specially considering both free general purpose and scientific
>  > programming languages.
>
>  Perhaps.  Flaming Thunder is only $19.95 per year for an individual
>  (and even less per individual for site licenses), which is less than
>  the cost of just one book on Python.

Bah, subscription for a programming language?  As far as I'm
concerned, that's reason enough not to bother with it.  Paying a
one-time fee, or even once per upgrade, for a full-featured IDE and
lots of support tools is painful but at least justifiable, whereas
paying a yearly license just to even be able to try something out when
there are so many free, sufficient options... There was an article
on/in Wired not so long ago about the economics of free, and how
there's a huge difference mentally between free and not-free, even if
the practical difference is "free" and "$0.01."  (Also, I assume
hdante meant, at least partly, free as in speech, not free as in
beer.)

As an aside, I clearly haven't written anything in FT, but looking at
your examples I don't know that I would want to--there's something
that feels very unnatural about writing English as code.  It also
somehow seems a bit verbose, while one of the strengths of something
like Python (since that's what you're comparing it to) is rapid
implementation.  Just using your "Set ... to" idiom, rather than a
regular = assignment, makes things much more wordy, without improving
readability.  Some of your other structures are awkward, for instance
"Something is a function doing" Again, more text with arguably no gain
in readability.

Just my two cents, anyway.  I now return you to the resident madman,
who I see has sent 4 or 5 messages while I was typing this one...


From george.sakkis at gmail.com  Fri May  9 09:24:19 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 06:24:19 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <50ea9d09-a315-4342-aaac-f5d8e5c5da15@x41g2000hsb.googlegroups.com>

On May 9, 9:02?am, Viktor <alefn... at gmail.com> wrote:
> This completely slipped of my mind... :)
>
> I'm trying to change the:http://wordaligned.org/svn/etc/echo/echo.py
>
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
>
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function - tried
> with inspect also)... And what is most interesting, when I do:
>
> def w(fn):
> ? ? print 'fn:', id(fn)
> ? ? return fn
>
> class A:
> ? ? @w
> ? ? def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
>
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...
>
> Is there a way to find out in the decorator "what will the decorated
> function be"?

The decorator does receive the correct function. The problem is that
at this point __init__ is still a plain function, not a method, i.e.
the sequence is:
   function -> decorated function -> method

There are several workarounds if you really want to differentiate
between functions and methods, none of them perfect:

- Apply the decorator after the class has been built, i.e. after the
functions have been wrapped in (unbound) methods:
    A.__init__ = w(A.__init__)

- (Risky Hack): Guess whether a function is intended to be wrapped in
a method by checking whether its first argument is named "self".
Obviously this is not foolproof and it doesn't work for static/class
methods.

- Have two different decorators, one intended for plain functions and
one for functions-to-be-methods (e.g. @deco, @decomethod).

George


From timj at tolisgroup.com  Mon May  5 13:43:58 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 10:43:58 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
Message-ID: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>

Hi Folks,

Searched the archives, but I can only find mention of db.h problems
relating to Linux.

I've downloaded the source for 2.5.2 and am trying to compile it in
Visual Studio 6 (SP6).  The error reports read:

--------------------Configuration: _bsddb - Win32
Debug--------------------
Compiling...
_bsddb.c
C:\Documents and Settings\Tim\My Documents\Python-2.5.2\Modules
\_bsddb.c(90) : fatal error C1083: Cannot open include file: 'db.h':
No such file or directory
Error executing cl.exe.

_bsddb_d.pyd - 1 error(s), 0 warning(s)

Any pointers?  A prerequisite that I might be missing?  The source is
the Python-2.5.2.tar.gz from the Python.org site.

Thanks for any help,
Tim


From hdante at gmail.com  Sun May  4 11:19:34 2008
From: hdante at gmail.com (hdante)
Date: Sun, 4 May 2008 08:19:34 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
	<b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>
	<d8e056dd-95bf-4704-9dc0-79310db50e32@a23g2000hsc.googlegroups.com>
Message-ID: <ee919023-8af1-4c28-9b4b-34d49152730a@25g2000hsx.googlegroups.com>

On May 3, 7:05?pm, sturlamolden <sturlamol... at yahoo.no> wrote:
> On May 3, 10:13 pm, hdante <hda... at gmail.com> wrote:
>
> > ?I believe that moving this to third party could be better. What about
> > numpy ? Doesn't it already have something similar ?
>
> Yes, Kahan summation makes sence for numpy arrays. But the problem
> with this algorithm is optimizing compilers. The programmer will be

 No, optimizing compilers shouldn't discard floating point operations
by default, since it changes program behavior. If they do, at least
there should be a flag to turn it off.

> forced to use tricks like inline assembly to get around the optimizer.
> If not, the optimizer would remove the desired features of the
> algorithm. But then we have a serious portability problem.



From ewertman at gmail.com  Thu May 29 20:43:41 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Thu, 29 May 2008 20:43:41 -0400
Subject: Code execution in imported modules
Message-ID: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>

So I'm working on some file parsing and building up a stack of regular
expressions that I need to use.  I was thinking of dropping them in an
external module.  I was wondering.. if I put them in a file called
regex.py like so :

import re

re1 = "..
re2 = "..

and then do:

rgx1 = re.compile(re1)
rgx2 = re.compile(re2)


and, in my script, parse.py py I do:

from regex import *

text = "bunch of stuff......."

m = rgx1.search(text)


Does the re get compiled when I import it, or every time I call it?
Since I'm calling it often, I'd like to compile it once.

Thanks!


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:56:07 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:56:07 -0300
Subject: how to pass a python socket to a .dll?
References: <HJiWj.2720$Kk3.1386@bignews9.bellsouth.net>
Message-ID: <op.ua4nztgax6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 12:48:26 -0300, inhahe <inhahe at gmail.com> escribi?:

> i'm trying to make a .dll that will let me use WSAPoll, which is a  
> windows
> sockets function, to mimic select.poll on a windows box.  i cbb learning
> python extensions, so i'm just going to use ctypes with a dll, so I hope
> that it doesn't bring up a big performance issue.   anyway, the problem  
> is
> that I want to use Python-created sockets with it, but WSAPoll requires
> winsock2.h SOCKET objects.

Use the fileno() method to get the SOCKET handle.
If you're going to use ctypes anyway, why bother to write a DLL? Just  
declare the required structures and functions using ctypes. Good luck!

-- 
Gabriel Genellina



From upton at virginia.edu  Wed May 21 12:42:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:42:44 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>
Message-ID: <5504f9ac0805210942r54de2f1fl2230c7e297acd5b6@mail.gmail.com>

On Wed, May 21, 2008 at 12:33 PM, Daniel Fetchinson
<fetchinson at googlemail.com> wrote:
>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>>
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>>
>> Arf ! A goto !
>
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?
>
And in the Linux kernel, and probably lots of other places
too--several places I've seen it used, they explain it as "this helps
clue in the optimizer" or something to that effect.  (That doesn't
mean it's a good idea to use it in everyday code though.)


From mnikhil at gmail.com  Thu May 29 17:30:59 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 30 May 2008 03:00:59 +0530
Subject: make a string a list
Message-ID: <g1n7an$1dr$1@registered.motzarella.org>

or a string iterable ? How can I do that. I have lots of '\r\n' 
characters in the string which I think can be easier if it were made 
into a list and I can easily see if the required value (its a numeral) 
is present in it or not after some position or after some characters' 
position.

Thanks,
Nikhil


From tarun.kap at gmail.com  Mon May  5 10:17:50 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 07:17:50 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<a20c4a0f-5c58-400d-9ee6-6adcbe458433@k13g2000hse.googlegroups.com>
Message-ID: <364d19ac-6ad4-4191-864c-8f2f305d2b21@34g2000hsh.googlegroups.com>

On May 2, 1:43 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 29 Apr, 15:56,TkNeo<tarun.... at gmail.com> wrote:
>
> > I need to do SSL file transfer using python? Is there a library i can
> > use ?
>
> > Thanks.
>
> If you have patience you can wait for Python 2.6 which will include a
> new ssl module, otherwise there are a lot of third party libraries out
> there which already binds OpenSSL for Python.
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib/


Python 2.6. Ah, that sounds very nice. I would be happy to upgrade to
2.4 from 2.3.
My boss does not think we need to upgrade.


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:18:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:18:24 -0300
Subject: file locked for writing
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
Message-ID: <op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 11:57:03 -0300, Dmitry Teslenko <dteslenko at gmail.com>  
escribi?:

> Hello!
> I use some script in python 2.5 from vim editor (it has python
> bindings) that updates some file
> and then launches another program (ms visual studio, for example) to
> do something with updated file.
> I faced problem when updated file is locked for writing until vim
> editor is closed.
>
> launch vim -> update file -> launch msvc -> file locked
> launch vim -> update file -> launch msvc -> close vim -> file locked
> launch vim -> update file -> -> close vim -> launch msvc -> file okay
>
> Update code is something like that:
>
> 	backup_file_name = '<some file name>'
> 	with open(backup_file_name, 'w') as backup_file:
> 		input = sax.make_parser()
> 		output = saxutils.XMLGenerator(backup_file, 'cp1252')
> 		filter = __vcproj_config_filter('<updated file name>', input, output)
> 		filter.parse('<updated file name>')
> 	shutil.copyfile(backup_file_name, '<updated file name>')
> 	os.remove(backup_file_name)
>
> __vcproj_config_filter is a descent of a XMLFilterBase; it substitutes
> some attributes in xml file and that's all.
> must be noted that __vcproj_config_filter instance holds reference to
> output (sax xml parser) object.

Is the code above contained in a function? So all references are released  
upon function exit?
If not, you could try using: del input, output, filter
That should release all remaining references to the output file, I  
presume. Or locate the inner reference to the output file  
(filter.something perhaps?) and explicitely close it.

-- 
Gabriel Genellina



From yhvh2000 at googlemail.com  Thu May  8 23:42:59 2008
From: yhvh2000 at googlemail.com (yhvh)
Date: Thu, 8 May 2008 20:42:59 -0700 (PDT)
Subject: range with variable leading zeros
Message-ID: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>

I want to generate a range with variable leading zeros


x = [0010, 0210]
padding = len(x[1])

for j in range(x[0], x[1]):
    print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}


This is syntactically incorrect, you can't insert a variable into the
string format options. Any ideas?


From arkanes at gmail.com  Mon May 19 13:31:08 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 19 May 2008 12:31:08 -0500
Subject: Thread killing - I know I know!
In-Reply-To: <D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
Message-ID: <4866bea60805191031p2e70a085s3475e179a3799089@mail.gmail.com>

On Mon, May 19, 2008 at 11:36 AM, Roger Heathcote
<usenet at technicalbloke.com> wrote:
> sjdevnull at yahoo.com wrote:
>>
>> On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
>> wrote:<snip>
>>>
>>> Despite many peoples insistence that allowing for the arbitrary killing
>>> of threads is a cardinal sin and although I have no particular threading
>>> problem to crack right now I remain interest in the taboo that is thread
>>> killing. The real world and it's data are messy and imperfect and I can
>
> <snip>
>>
>> In general, use processes when you can and threads only when you
>> must.  OS designers spent a lot of energy implementing protected
>> memory, no sense throwing out a fair chunk of that hard work unless
>> you actually need to.
>
> Fair point, but for sub processes that need to be in close contact with the
> original app, or very small functions that you'd like 100s or 1000s of it
> seems like a kludge having to spawn whole new processes build in socket
> communications and kill via explicit OS calls. I can't see that approach
> scaling particularly well but I guess there's no choice.
>

It's not a kludge - the whole reason why killing a thread is undefined
and a "cardinal sin" is because it's in your own address space and you
can't guarantee anything about how it left things when you killed it.
You simply can't have it both ways. If you want to be able to safely
and sanely kill an uncooperative thread (*especially* third party code
you don't control) you have to isolate it from your address space, and
this means a process. This is a fundamental problem with the entire
idea of shared-state concurrency. For the record, you can't use 1000s
of threads either - if you really need 1000s of concurrent things
running you need to re-think your concurrency model and possibly your
choice of languages and environment.

The messiness of the real world is *why* you should use processes, not
a reason to avoid them.

> Does anyone think it likely that the threading module (and threading in
> general) will be improved and augmented with features like timeouts and
> arbitrary threadicide in the next year or two?  Seems there's little scope
> for tapping the power of the current generation of multiple cores with the
> current pythons, tho I appreciate breakneck speed has never been a design
> objective it looks like multicore is set to be the next generation PC
> architecture.
>

They absolutely should not be. Adding an API which can't work in the
general case and is dangerous even when it can work does not do anyone
any favors.

> Roger Heathcote - technicalbloke.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From __peter__ at web.de  Tue May 13 09:32:00 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 15:32:00 +0200
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
Message-ID: <g0c58c$qag$01$1@news.t-online.com>

Giuseppe Ottaviano wrote:

> def ichain(seq):
> ????????for s in seq:
> ????????????????for x in s: yield x
> 
> (which is often useful and I don't think it has been included in ?
> itertools) you can iterate lazily on the file:

Python 2.6 includes itertools.chain.from_iterable() with that functionality.

Peter


From sebastian.noack at googlemail.com  Wed May 28 06:13:10 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Wed, 28 May 2008 03:13:10 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
	<414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com> 
	<mailman.1645.1211893102.12834.python-list@python.org>
Message-ID: <7c614790-5233-45c2-bcda-4eee0a9c4bcb@z72g2000hsb.googlegroups.com>

That is right, only bz2 is affected. I am happy that i could help. ;)

Regards
Sebastian Noack


From dkcombs at panix.com  Thu May 29 21:08:47 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 01:08:47 +0000 (UTC)
Subject: VERY SORRY FOR THAT CROSSPOST;
	Re: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <g1nk2v$6f8$1@reader2.panix.com>

(This one is also cross-posted, to apologize to one and all
about my just-prior followup.)

I stupidly didn't remember that whatever followup I made
would also get crossposted until *after* I had kneejerked
hit "s" (send) before I noticed the warning (Pnews?) on
just how many groups it would be posted to.

A suggestion for Pnews: that as soon as you give the
F (followup for trn), ie as soon as Pnews starts-up
on this followup, before you've typed in anything
or given it a filename to include, that AT THAT TIME
it remind you that it'll be crossposted to the
following 25 newsgroups:
  1: foo
   2: comp.lang.perl.misc
  3: other-group
  4: ...


, so way before you've said anything, you can
abort it if you want to.


SORRY!


David




From rsoh.woodhouse at googlemail.com  Wed May 28 15:31:45 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 12:31:45 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
Message-ID: <0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>

On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > Hi,
>
> > I'm trying to work out some strange (to me) behaviour that I see when
> > running a python script in two different ways (I've inherited some
> > code that needs to be maintained and integrated with another lump of
> > code). The sample script is:
>
> > # Sample script, simply create a new thread and run a
> > # regular expression match in it.
> > import re
>
> > import threading
> > class TestThread(threading.Thread):
>
> >     def run(self):
> >         print('start')
> >         try:
> >             re.search('mmm', 'mmmm')
> >         except Exception, e:
> >             print e
> >         print('finish')
>
> > tmpThread = TestThread()
> > tmpThread.start()
> > tmpThread.join()
> > import time
> > for i in range(10):
> >     time.sleep(0.5)
> >     print i
>
> > # end of sample script
>
> > Now if I run this using:
>
> > $ python ThreadTest.py
>
> > then it behaves as expected, ie an output like:
>
> > start
> > finish
> > 0
> > 1
> > 2
> > ...
>
> > But if I run it as follows (how the inherited code was started):
>
> > $ python -c "import TestThread"
>
> > then I just get:
>
> > start
>
> > I know how to get around the problem but could someone with more
> > knowledge of how python works explain why this is the case?
>
> Works for me. And I don't see any reason why it shouldn't for you -
> unless you didn't show us the actual code.
>
> Diez

Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
on Ubuntu 7.10. Which version of python/what platform were you using?

Rowan


From maxerickson at gmail.com  Thu May 15 10:01:51 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 15 May 2008 14:01:51 +0000 (UTC)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <Xns9A9F660601FFCmaxericksongmailcom@80.91.229.13>

castironpi <castironpi at gmail.com> wrote:

> Why can't I write this?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

Because you don't know how?



max



From nick at craig-wood.com  Fri May 30 07:30:20 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 30 May 2008 06:30:20 -0500
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
	<slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>
	<g1mku3$ghu$1@aioe.org>
Message-ID: <slrng3vnv2.jf2.nick@irishsea.home.craig-wood.com>

Matt <mr.edel at gmx.at> wrote:
>  Okay, thanks a lot for your reply Nick, I think you pushed me back on 
>  the right way.

Good!

>  Now I started with trying to implement the callback functions and am 
>  stuck at the following point:
> 
>  I define my classes/structures/unions:
> 
>  class cdStream(Structure):
>       _fields_ = [("contextH", c_uint),
>                        ("open", c_void_p),
[snip]
>  then i define my functions (right now I do just nothing) and at the same 
>  time I define the datatypes like they're listed in my C sample program:
> 
>  def pystreamopen (contextH, mode, pErr):
>       pass
> 
>  cstreamopen = CFUNCTYPE(c_uint, c_ushort, c_uint)
[snip]
>  and now the problem starts: i want the pointers in the cdStream 
>  Structure point at my functions and tried to do it the following way:
> 
>  data = cdStgMedium()
>  data.type = 0
>  data.u.pStream.contextH = c_uint(3) #must be some kind of identifier.
>  data.u.pStream.open = cstreamopen(pystreamopen)
[snip]
>  unfortunately that doesn't work because Python returns a TypeError: 
>  incompatible types, CFunctionType instance instead of c_void_p instance
> 
>  Any ideas/help (please)?

Probably the best thing is if you define the union with the types of
the pointers to your functions instead of c_void_p, eg

  class cdStream(Structure):
       _fields_ = [("contextH", c_uint),
                        ("open", cstreamopen),
                        ("close", cstreamclose), # etc...

This will involve you re-ordering your definitions.

Or alternatively, you could cast the function pointer to a c_void_p
first, eg

  data.u.pStream.open = c_void_p( cstreamopen(pystreamopen) )

which should work but is less typesafe.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kamhung.soh at gmail.com  Mon May 19 19:05:48 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 20 May 2008 09:05:48 +1000
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
Message-ID: <op.ubfbrya3ev04yd@melwxp23>

On Tue, 20 May 2008 06:58:28 +1000, <amit.uttam at gmail.com> wrote:

> On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> amit.ut... at gmail.com writes:
>> > I've recently jumped big time into python and I'm working on a
>> > software program for testing automation.
>>
>> Welcome, to both fields :-)
>>
>
> Thanks! I am having a great time learning and coding in python. It's
> an amazing programming language.
>
>> > I had a question about proper logging of output. What I would like
>> > is:
>>
>> >  1. a function syslog (to log output to log file only)
>> >  2. a function stdout (to log output to stdout only)
>> >  3. a function sslog (to log output to both log and stdout)
>>
>> > Right now I am using StandOut module
>>
>> Have you investigated the 'logging' module in the Python standard
>> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
>> to meet your listed requirements, without need of external
>> dependencies.
>
> Hmm..Yeah I didn't realize python had its own standard logging
> facility. I took a look at it and it seems to do the job. However, the
> output seems to be syslog style output. In the program I am writing,
> the log file stores all the output of the commands being run (e.g. tcl
> scripts, etc). Will this be possible using the built in python logging
> module?
>
> Thanks,
> Amit
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You can define the format of the log output in basicConfig(), for example:

 from logging import basicConfig, error, info, INFO
...
   basicConfig(
       datefmt='%Y%m%d_T%H%M%S',
       filemode='a',
       filename=LOG_PATH,
       format='%(asctime)s,%(levelname)s,%(message)s',
       level=INFO
   )

If you want to log the output of other commands in your log file, you can  
connect a pipe to that command.  Maybe look at "subprocess -- Subprocess  
management" in http://docs.python.org/lib/module-subprocess.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From exarkun at divmod.com  Mon May  5 09:48:36 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 09:48:36 -0400
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <725404980805050641s52cac3b8mf238ff29883c6dba@mail.gmail.com>
Message-ID: <20080505134836.6859.727372751.divmod.quotient.59037@ohm>

On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>Hi!
>
>I have a C module for which I created a wrapper with swig. The function def is:
>
>C:
>
>int some_thing(unsigned char * the_str);
>
>eg:
>
>Python:
>
>some_module.some_thing (the_str)
>
>Now I would like to feed it with a UTF-8 formatted string:
>
>test = u'Make \u0633\u0644\u0627\u0645, not war.'

`test? is not a UTF-8 encoded string.  It's a unicode string.

To get a UTF-8 encoded string from a unicode string, use the `encode?
method:

    some_module.some_thing(test.encode('utf-8'))

Jean-Paul


From fred.sells at adventistcare.org  Tue May 20 09:52:12 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Tue, 20 May 2008 09:52:12 -0400
Subject: Newbie In Python
In-Reply-To: <4832a6e3$0$28693$426a74cc@news.free.fr>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B090D@acesxch01.ADVENTISTCORP.NET>

get a python-aware editor.  I vary between emacs and Eclipse, depending on my mood and the size of the project.

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of Bruno Desthuilliers
> Sent: Tuesday, May 20, 2008 6:25 AM
> To: python-list at python.org
> Subject: Re: Newbie In Python
> 
> 
> andrew.smith.cpp at gmail.com a ?crit :
> > I have Heard About "Python" its a OOD Language. 
> 
> 'OOD' => 'object oriented ???' ?
> 
> > i have to Learn it
> > where from i should start it.
> 
> Err... What about reading the docs on python.org - possibly starting 
> with the tutorial:
> http://docs.python.org/tut/tut.html
> 
> You'll find other tutorial etc here:
> http://www.python.org/doc/
> 
> 
> > i have python compiler
> 
> Just for the record, "python" is also the name of a compiler for CMU 
> Common Lisp (totally unrelated to the Python language), so make sure 
> that what you have is the CPython language install.
> 
> HTH
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From tjreedy at udel.edu  Tue May 13 03:11:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 03:11:30 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net><41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com><48275446$0$11628$607ed4bc@cv.net>
	<87mymw8nr0.fsf@benfinney.id.au><4827bda2$0$11606$607ed4bc@cv.net>
	<87od7c6qua.fsf@benfinney.id.au> <482912b7$0$11641$607ed4bc@cv.net>
Message-ID: <g0bev0$rho$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:482912b7$0$11641$607ed4bc at cv.net...
| The reason I even brought this up is because I remember someone saying a
| while back (probably here on the newsgroup) that the true use of a for
| loop was to iterate through a sequence (for the purpose of using that
| sequence), not to do something X number of times.

I believe the specific context was to counteract some people's tendency to 
write
  for i in range(len(seq)): do stuff with seq[i]
when they would better (more Pythonically) write
  for item in seq: do stuff with item
or even
  for i,item in enumerate(seq): do stuff with i and item.

One subtle but real advantage is that the latter two forms work with 
iterables that do not have a known-ahead length or which even continue 
indefinitely.

| Once they made this
| comment, I suddenly saw the for loop in a new (and I believe purer)
| light. That was the first time I realized what it was really meant
| to do.

That is an important insight.  But to me it does not negate the "do 
something n times" usage when there is no iterable other than range to 
iterate.  Do note that range has *not* been removed from 3.0 and that its 
main intended usage is for looping.

| Now, you could easily make the argument that the Python for loop is a
| much simpler tool to accomplish *both* of the above, and I suppose that
| makes sense.

Yes.  Python leans toward minimalism.  Proposals for various 
special-purpose loopin constructs have been rejected.  For-loops cover most 
looping needs; while-loops cover everything else.

Terry Jan Reedy





From terry at jon.es  Mon May  5 16:01:02 2008
From: terry at jon.es (Terry Jones)
Date: Mon, 5 May 2008 22:01:02 +0200
Subject: [Twisted-Python] Counting errors in a DeferredList and avoiding
	Unhandled error in Deferred messages
In-Reply-To: Your message at 13:38:13 on Monday, 5 May 2008
References: <18463.16271.516266.379803@jon.es>
	<20080505173813.6859.2132215018.divmod.quotient.59119@ohm>
Message-ID: <18463.26494.36090.371860@jon.es>

Hi Jean-Paul

> You can do this (if you replace `pass? with `None?, anyway) or you can pass
> `consumeErrors=True? to the `DeferredList? initializer which will make it
> do something equivalent.

Thanks. Sorry - I should have just read the docs again :-)

Terry


From ranjan.suruchi at gmail.com  Thu May  8 07:19:08 2008
From: ranjan.suruchi at gmail.com (ranjan)
Date: Thu, 8 May 2008 04:19:08 -0700 (PDT)
Subject: Urgent opening for Engineer (Open Source Technologies)
Message-ID: <2706fed6-8d00-4dd3-b6ea-815e1b607516@f24g2000prh.googlegroups.com>

Hi,This is regarding an opening for software Engineer(Open Source
Technologies)
The opening is with our client for their Noida branch.They are working
on various platforms like Microsoft,Open Source Technology.
The designation will be of software engineer/senior software engineer.
Skillset Required will be Plone,experience in development
& implementation of applications using Python & open source
technologies.
Experience : 2-3 years
Qualification : BE/B.Tech/MCA/PGDCA or equivalent.
If you are interested you can forward your CV on this mail id
ranjan.suruchi at gmail.com as early as possible.


From wojtek.gminick.walczak at gmail.com  Tue May  6 02:32:03 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 08:32:03 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
References: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
Message-ID: <2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>

2008/5/6, Yuan HOng <hongyuan1306 at gmail.com>:
>  It seems decimal object will always be larger than float in
>  comparasion, which goes against common sense:
>
>  >>> from decimal import Decimal
>  >>> a = Decimal('0.5')
>  >>> a > 99999
>  False
>  >>> a > 99999.0
>  True
>
>  It seems to me that rather than allowing this to happen, comparasion
>  between the two should either be made correct (by convertion decimal
>  to float e.g.) or forbidden, like arithmatic operations between the
>  two types.

Looks like a nasty bug.

a > 99999.0 returns True because NotImplemented > 99999.0 returns True.
a < 99999.0 returns False because NotImplemented < 99999.0 returns False.

As you can see the real comparision has nothing to do with your Decimal number.
I think you can report it at bugs.python.org.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From pavlovevidence at gmail.com  Fri May 23 21:00:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 18:00:29 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>

On May 23, 6:59 pm, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
>         printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
>         print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?


p = myfunction()
if p:
    print p

(I recommend doing it this way in C, too.)

For the case where you want to do this in an elif-clause, look for the
recent thread "C-like assignment expression?" which list some
workarounds.  Or just Google this newsgroup for "assignment
expression".  It's one of few minor irritating things in Python
syntax.


Carl Banks


From unknown_hero007 at hotmail.com  Tue May  6 08:05:21 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 05:05:21 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
Message-ID: <ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>

Tim Golden wrote:
> In a spirit of teaching people to fish...
>
> ... If you put something like "Python windows registry" into Google, you
> get quite a few hits, the top one of which is probably pointing to the stdlib
> _winreg module, but several others point towards wrapper classes, modules
> etc. which provide a simpler or at least a different interface to the registry.
>
> Have a look at those and see if you can't work out what to do.
>
> TJG

The first link which points to the Python documentation for the
_winreg module I already checked, even before coming here. I am
wondering how I should do the loop I need (go through
HKEY_LOCAL_MACHINE and read one subkey at a time, if it contains this
'foo' then change it into 'moo'). As I already said, I am by no means
an expert in Python (heck, I learned the basics only a month ago).
However, I am willing to learn.

Also my prior experience with the Windows registry is mostly by the
Registry Editor shipped with Windows. While I do understand what keys,
values and hives are, I do not have a great experience in the others.

If it's not too much to ask, maybe someone (who is much better than
me) could make a code snippet that reads a certain hive and replaces
values that are predetermined (preferably variables, not arguments if
possible).

If that's out of the question, at least push me gently into the right
direction.

So basically I am looking for these things:

1) Read one subkey from HKEY_LOCAL_MACHINE at a time (I think
QueryValueEx() is needed here)
2) Check if said subkey contains some predetermined string (like 'foo'
here)
3) If the above applies, change the value into another predetermined
string (like 'moo' here)


Also, how should I determine the length of the loop? I personally am
too fond of the for loop, but if I need to use, like, while, then so
be it.

Thanks in advance.


From deets at nospam.web.de  Wed May  7 08:36:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 14:36:51 +0200
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <68dm40F2rekquU1@mid.uni-berlin.de>

swapsun at gmail.com wrote:

> Any idea why the following program does not work? I was learning IO on
> Python and the following generates a TypeError: range() integer end
> argument expected, got str.
> I am a beginner.

Because raw_input does return you as string which you need explicitly
convert to a number, e.g. doing

i = int(input)

Diez


From skanemupp at yahoo.se  Thu May 15 12:03:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:03:31 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
Message-ID: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>

print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\trainingsetunzipped\training_set\mv_0000001.txt')

d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
sweden.gif')
d.close()

exists returns false but when i open it doesnt complain. how come?

another file that exists returned false for complained when i tried to
open it.


From castironpi at gmail.com  Thu May 15 09:51:38 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 06:51:38 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
Message-ID: <46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>

On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > i currently have locations of the mp3s in question as strings, which
> > works for parsing local files, but gives me a "No such file or
> > directory" error when it tries to process URLs. ?it seems terribly
> > inefficient to download each mp3 just to get at that small tag data,
> > and i assume there's a way to do this with file() or open() or
> > something, i just can't get it to work.
>
> You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> with ID3 V1 tags you'll have to download the file anyway because those are
> in the last 128 bytes of an MP3 file.
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch

Just don't import time.  What would you do with an autolocking timer,
such as time.sleep( ) on a thread?  I am tongue tied in the presence
of a lady.


From sjmachin at lexicon.net  Sat May 24 09:29:58 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 13:29:58 GMT
Subject: SQLite import fails sometimes ?
In-Reply-To: <mailman.1523.1211631350.12834.python-list@python.org>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>
	<mailman.1523.1211631350.12834.python-list@python.org>
Message-ID: <48381851$1@news.mel.dft.com.au>

Stef Mientki wrote:

> I don't know if this matters, but I also use sqlite3 from other than 
> Python programs.

You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
Python, and (I guess) you have another instance of sqlite3.dll somewhere 
else, for use "from other than Python programs". Are they the same 
version? If not, this may be the problem. Start up your other 
application, then try to import sqlite3 from Python. If this is the 
problem, and you must be able to run both apps simultaneously, you will 
probably need to update one or the other.

Cheers,
John


From mde at MicahElliott.com  Tue May  6 19:00:13 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Tue, 06 May 2008 16:00:13 -0700
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <20080506230013.GE6567@micahelliott.com>

On 2008-05-06 Michael Robertson wrote:

> I'm having trouble opening a file in linux, whose path has
> spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
> >>> open('./my test/test.txt')
> Exception

That's funny.  These exact steps work fine for me on Linux, with
Python 2.5.2, and even 1.5.2.

Does 'os.path.normpath' have anything interesting to say about
what you're passing it?

> but yet...
>
> >>> import os
> >>> os.chdir('./my test')
> >>> open('./test')
>
> works just fine.

How doctored up is this example?  In the above ./test should not
actually exist.  Did the chdir actually work?  Or did you remove
the .txt?

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:51:12 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:51:12 -0400
Subject: can't delete from a dictionary in a loop
In-Reply-To: <43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>
Message-ID: <AknXj.46809$3v1.1644@bignews3.bellsouth.net>

bruno.desthuilliers at gmail.com wrote:
> On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>
>>
>>> Dan Upton wrote:
>>>> for pid in procs_dict:
> (snip)
>>>    for pid in procs_dict.keys():
>> I'm afraid this will do the same exact thing. A for loop on a dict
>> iterates over the dict keys, so both statements are strictly
>> equivalent from a practical POV.
> 
> Hem. Forget it. I should think twice before posting - this will
> obviously make a big difference here.  Sorry for the noise.

:-)  It appears that you would be right if this was Python 3.0, though:

Python 3.0a5 (r30a5:62856, May 16 2008, 11:43:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> d = {1: 2, 3: 4, 5: 6}
 >>> for i in d.keys(): del d[i]
...
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
RuntimeError: dictionary changed size during iteration

Maybe 'for i in d' and 'for i in d.keys()' *are* functionally equivalent in 3.0, 
as d.keys() returns an object that iterates over d's keys... but I haven't read 
enough about it yet to be sure.  In any case, the problem goes away when we 
force a list:

 >>> d = {1: 2, 3: 4, 5: 6}
 >>> for i in list(d.keys()): del d[i]
...
 >>> d
{}

--Hans


From jenn.duerr at gmail.com  Tue May 13 15:02:29 2008
From: jenn.duerr at gmail.com (Jennifer Duerr)
Date: Tue, 13 May 2008 12:02:29 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
Message-ID: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>

All,

I need help concerning SOAP, Python and XML. I am very new to this, so
dumbing it down for me will not offend me!

I'm using Python and want to send a user-inputted string to an
existing Java web app that
will output results to XML. I need to capture elements of the XML and
put
the info into a table. (say I send a single/simple address string to
this
webservice/geocode, which then returns numerous possible matches with
XY
values and score values, and I want to capture that into a table)

How do I go about doing this? I'm told I need to use SOAP. I
discovered that
the best module to use is ZSI (please correct me if I'm wrong). I have
installed the necessary module. Examples I have seen are plenty and
all so different, its not clear to me how to go about.  I have been
spinning my wheels for too long on this!

Can someone provide some example code similar to what I need to do? Or
any
guidance would be appreciated.

Thanks!


From ladynikon at gmail.com  Thu May  1 14:39:47 2008
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Thu, 1 May 2008 14:39:47 -0400
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
In-Reply-To: <72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>
References: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>
	<72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>
Message-ID: <59f9c5160805011139g47089eaah95f4281e6036f00@mail.gmail.com>

<3 BAHAHAHAA


From pm604407 at gmail.com  Sat May 31 00:49:07 2008
From: pm604407 at gmail.com (meg)
Date: Fri, 30 May 2008 21:49:07 -0700 (PDT)
Subject: TRISHA FILM ACTRESS
Message-ID: <12acbb43-d107-47ff-869a-a161af8bd59f@w34g2000prm.googlegroups.com>

http://trishafilmactress.blogspot.com/2008/05/modern-trisha.html


From robin at NOSPAMreportlab.com  Tue May 20 16:51:33 2008
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Tue, 20 May 2008 21:51:33 +0100
Subject: Report Lab Image Flowable Issue ..
In-Reply-To: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>
References: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>
Message-ID: <483339D5.5000308@jessikat.plus.net>

dbee wrote:
> I'm try to generate a report that will span multiple pages and have
> dynamic content using python reportlab. I have no issues with regards
> to generating images and then using     p.drawInlineImage(signup_img,
> 100,150)  to draw them onto the canvas.
> 
> The problem that i have comes when i try to create flowables so that
> my layout can span multiple pages. The images themselves never
> actually show up on the page ...
......

I think you should ask this on the reportlab users list which you can 
find at http://two.pairlist.net/pipermail/reportlab-users/

As for your specific problem perhaps you should start with some simple 
examples.
-- 
Robin Becker


From niklas.norrthon at hotmail.com  Fri May  9 06:46:49 2008
From: niklas.norrthon at hotmail.com (Niklas Norrthon)
Date: Fri, 9 May 2008 03:46:49 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>

On 9 Maj, 12:30, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??

There is a distribution of PythonWin bundled with the
ArcGIS Desktop installation media, but it is not
installed by the ArcGIS installer.

You have three options:
1. Install it manually from the ArcGIS installation
media.
2. Find it on the web (google for it), download and
install.
3. (My recommendation) Don't bother. IDLE is pretty
good. Emacs even better (unless you hate emacs).

--
Niklas Norrthon
ESRI S-GROUP


From dullrich at sprynet.com  Wed May 14 16:37:50 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 15:37:50 -0500
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <dullrich-A8B0BE.15375014052008@text.giganews.com>

In article 
<a14c2400-e88b-4d90-80bb-a5fe27fedea3 at m44g2000hsc.googlegroups.com>,
 Iain King <iainking at gmail.com> wrote:

> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.
> 
> dlg.ShowModal()
> onBrowse()
> 
> obviously doesn't work, and neither does the reverse.  I was hoping
> that the dialog would throw some kind of "I have been shown" event,
> but it doesn't (as far as I can tell).  How do I make the dialog do
> something as soon as it's been shown?

It's too bad that you found an answer. You _shouldn't_ have your
dialog pop up a file-selection box as soon as it's shown! That's
not the way dialogs usually work, so you're going to confuse
people.

Instead, first pop up the file-selection box, and then pop up
the dialog (without the Browse button) to do whatever else it
does after you've got the filename.

> Iain


From aisaac at american.edu  Sun May 11 00:08:38 2008
From: aisaac at american.edu (Alan Isaac)
Date: Sun, 11 May 2008 04:08:38 GMT
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <mailman.871.1210342518.12834.python-list@python.org>
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
	<mailman.871.1210342518.12834.python-list@python.org>
Message-ID: <ajuVj.23627$5Y1.15331@trnddc04>

J. Cliff Dyer wrote:

> looks like a good approach to me



OK, thanks.

Another approach is to begin with a set of stocks

and remove them as they report.  You can then trigger

a report with the empty set instead of repeatedly

calling ``all``. After a report the set can be

"refilled".



Cheers,

Alan Isaac




From gherron at islandtraining.com  Wed May 28 12:19:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 28 May 2008 09:19:32 -0700
Subject: Any way to loop through object variables?
In-Reply-To: <483D7A47.3030606@ecs.soton.ac.uk>
References: <483D7A47.3030606@ecs.soton.ac.uk>
Message-ID: <483D8614.7000808@islandtraining.com>

Dave Challis wrote:
> Hi,
> Just wondering if there's a way to iterate through all variables which
> an object has set?
>
> Specifically, I'm using the OptionParser module, which returns an
> options object, containing all command line options as object variables.
>  I'd like to iterate over these rather than getting at them by name.
>
> Cheers,
> Dave

For this object (and many others), you can get at the attributes with 
the vars(...) builtin. 

It returns a dictionary of attribute names and values.

Gary Herron


--
http://mail.python.org/mailman/listinfo/python-list




From inhahe at gmail.com  Fri May 16 14:12:47 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 14:12:47 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
Message-ID: <28kXj.142759$Er2.39732@bignews6.bellsouth.net>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go 
> out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's 
> just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > I have a proposition to ask you all: Python emphasizes state. Is it
> > true?

Please don't feed the bots.

--


I figured the question was interesting enough to warrant discussion whether 
it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.

Also, if it's a bot I'm floored and the man who wrote it could probably 
solve cancer and world hunger with five lines of asm.





From castironpi at gmail.com  Wed May  7 05:59:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 02:59:53 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>
Message-ID: <a5bbbf8f-73e5-4907-b470-a805e20d33d9@l64g2000hse.googlegroups.com>

On May 7, 1:40?am, Jetus <stevegi... at gmail.com> wrote:
> On May 4, 7:22 am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
>
> > > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > > > Is there a good place to look to see where I can find some code that
> > > > will help me to save webpage's links to the local drive, after I have
> > > > used urllib2 to retrieve the page?
> > > > Many times I have to view these pages when I do not have access to the
> > > > internet.
>
> > > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> > > --
> > > Gabriel Genellina
>
> > A lot of the functionality is already present.
>
> > import urllib
> > urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> > from htmllib import HTMLParser
> > from formatter import NullFormatter
> > parser= HTMLParser( NullFormatter( ) )
> > parser.feed( open( 'main.htm' ).read( ) )
> > import urlparse
> > for a in parser.anchorlist:
> > ? ? print urlparse.urljoin( 'http://python.org/', a )
>
> > Output snipped:
>
> > ...http://python.org/psf/http://python.org/dev/http://python.org/links/h...
> > ...
>
> How can I modify or add to the above code, so that the file references
> are saved to specified local directories, AND the saved webpage makes
> reference to the new saved files in the respective directories?
> Thanks for your help in advance.- Hide quoted text -
>
> - Show quoted text -

You'd have to convert filenames in the loop to a file system path; try
writing as is with makedirs( ).  You'd have to replace contents in a
file for links, so your best might be prefixing them with localhost
and spawning a small bounce-router.


From banibrata.dutta at gmail.com  Fri May  9 09:17:27 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 18:47:27 +0530
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>
References: <mailman.785.1210261857.12834.python-list@python.org>
	<3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>
	<383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805090617g4f51d40fo57965ae293562979@mail.gmail.com>

Any chance that there is a "catch-all" in the code.
As per PEP8 and I'm sure common knowledge of all the folks programming in
Python for a while -- a
>>>catch:
could just lead to this problem.


On 5/9/08, Floris Bruynooghe <floris.bruynooghe at gmail.com> wrote:
>
> On May 9, 11:19 am, spectru... at gmail.com wrote:
> > Thanks for the replies.
> >
> > On May 8, 5:50 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >
> > > Ctrl+C often works with Python, but as with any language, it's possible
> > > to write a program which will not respond to it.  You can use Ctrl+\
> > > instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> > > Ctrl+\ sends SIGQUIT which typically isn't)
> >
> > Yes, thank you, this seems to work. :)
> >
> > I did some more testing and found out that the problem seems to be
> > thread-related. If I have a single-threaded program, then Ctrl+C
> > usually works, but if I have threads, it is usually ignored. For
> > instance, the below program does not respond to Ctrl+C (but it does
> > die when issued Ctrl+\):
> >
> > import threading
> >
> > def loop():
> >   while True:
> >     pass
> >
> > threading.Thread(target=loop,args=()).start()
>
> Your thread needs to be daemonised for this work.  Othewise your main
> thread will be waiting for your created thread to finish.  E.g.:
>
> thread = threading.Thread(target=loop)
> thread.setDaemon(True)
> thread.start()
>
> But now it will exit immediately as soon as your main thread has
> nothing to do anymore (which is right after .start() in this case), so
> plug in another infinite loop at the end of this:
>
> while True:
>    time.sleep(10)
>
> And now your threaded app will stop when using C-c.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From alangrow at gmail.com  Sat May 17 16:14:50 2008
From: alangrow at gmail.com (alan grow)
Date: Sat, 17 May 2008 15:14:50 -0500
Subject: waiting on an event blocks all signals
In-Reply-To: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
	<4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
Message-ID: <f39e8ddc0805171314y7975fd68rd4f0539a4f28f10@mail.gmail.com>

On Sat, May 17, 2008 at 2:49 PM, John Schroeder <jschroed at gmail.com> wrote:
> ^C only kills the main thread.  Use Control-Break to kill all threads.
>>
>> python -c "import threading; threading.Event().wait()"
>> ^C^C^C^C

There's a single main thread here though. Or am I missing something?


From eliben at gmail.com  Sun May 25 11:40:26 2008
From: eliben at gmail.com (eliben)
Date: Sun, 25 May 2008 08:40:26 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
Message-ID: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>

Hello,

I have a small wxPython application. Today I was trying to add some
RPC capability to it, so I implemented an instance of
SimpleXMLRPCServer that runs in a separate thread when invoked and
answers requests.

All went fine until I realized that I have to sometimes stop the
server - which is where I ran into a problem. Python threads can not
be killed after they've been started. They can be kindly requested to
end, but it's up to the thread itself to decide when it wants to
finish. At least this is my understanding. It probably makes sense,
because threads can hold resources which can't just be dropped
suddenly, and have to be cleaned in a proper manner. (Does this sound
like the truth ?)

Anyway, this creates a problem because SimpleXMLRPCServer likes to
block and never return. I dug deeper and found out that all offspring
of SocketServer can only handle requests in a blocking manner. Even if
you call handle_request( ) and not serve_forever(), it will block
until a request is received and handled. This means that a
SocketServer object running in a thread blocks the thread, and this
thread can not be stopped.

Is there any graceful solution to this problem ?

I suppose I can use sockets in non-blocking mode, or use select(), but
this will mean I will have to implement my server with raw sockets and
not a handy helper like SocketServer. For the XML-RPC server I want
this is a headache, as I will probably have to implement my own XML-
RPC server based on raw non-blocking sockets.

Thanks in advance for any ideas and suggestions
Eli


From maxm at mxm.dk  Tue May  6 16:06:23 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 06 May 2008 22:06:23 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <m28wyn78oe.fsf@googlemail.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<m28wyn78oe.fsf@googlemail.com>
Message-ID: <fvqdnv$a4f$1@ger.gmane.org>

Arnaud Delobelle skrev:
> jmDesktop <needin4mation at gmail.com> writes:
> 
>> Studying OOP and noticed that Python does not have Interfaces.  Is
>> that correct?  Is my schooling for nought on these OOP concepts if I
>> use Python.  Am I losing something if I don't use the "typical" oop
>> constructs found in other languages (Java, C# come to mind.)  I'm
>> afraid that if I never use them I'll lose them and when I need them
>> for something beside Python, I'll be lost.  Thank you.
> 
> You're not missing anything.  An Interface is the Poor Man's Multiple
> Inheritance.  But in truth, even without multiple inheritance, Python
> wouldn't need java-like interfaces.


Interfaces are a great concept for many things, and they can cover a few 
soft spots in Python.

There is the possibility of using the great zope.interface library 
http://pypi.python.org/pypi/zope.interface. Just use:

"easy_install zope.interface"

And you have interfaces.



-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From kyosohma at gmail.com  Fri May  2 13:43:57 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 10:43:57 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
	<8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>
Message-ID: <f05abe25-b0e1-4c91-840a-840844c4c050@t54g2000hsg.googlegroups.com>

On May 2, 12:03 pm, globalrev <skanem... at yahoo.se> wrote:
> print pygame.K_a displays 97 btw. what does that mean? i though it
> would return true or false or 0 or 1.

That's probably the key code value. Or the ASCII representation for
the key. You'd have to read the pygame docs to really know.

Mike


From celoserpa at gmail.com  Thu May 15 13:21:34 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 14:21:34 -0300
Subject: Handling test data that depends on temporal data (that might change
	while the test runs)
Message-ID: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>

Hello,

So, I have this particular method, generate_chat_dir_string, which should
generate a string in the following format:
 "md5hexstring-day-month-year-hour-minute"

This string will be used to create a directory in the filesystem.

I'm trying to adopt the TDD approach, so, I'm starting by testing all the
methods of the Chat class, including this one. However, an issue just popped
up, this is the test code:


   1.   def test_generate_chat_dir_string(self):
   2.         import md5
   3.         import random
   4.         import datetime
   5.         md5_handler = md5.new()
   6.         users = [{"user":"pedro","atendente":False},{
   "user":"jo?o","atendente":True}]
   7.         #salt = random.random().to_s()
   8.         #md5_handler.update(salt)
   9.         now = datetime.datetime.now()
   10.         ts = now.strftime("%d-%m-%Y-%H-%M")
   11.         for user in users:
   12.             md5_handler.update(user["user"])
   13.
   14.
   15.         seed = md5_handler.hexdigest()
   16.
   17.         final_string = seed + "-" + ts
   18.
   19.         method_generated_string = self.chat.generated_chat_dir_string
   (users,seed)
   20.
   21.         self.assertEquals(final_string,method_generated_string)

As you can see, it generates a specific set of data and assembles a
final_string. It then feeds the same data to generate_chat_dir_string and
compare to see if the final_string is equal to the string generated by the
tested method.

However, they might not be equal becouse of the temporal data. In this case
I'm not using seconds, but in a bizarre situation a minute could have passed
and the test would faile becouse the two strings would have a different
minute portion. Something like this:

"b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
"b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"

How could I handle this issue?

Thanks in advance,

Marcelo.
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From aahz at pythoncraft.com  Sat May  3 15:55:04 2008
From: aahz at pythoncraft.com (Aahz)
Date: 3 May 2008 12:55:04 -0700
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org>
	<481B27D9.3000107@behnel.de>
	<eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>
	<286490d5-01ce-40c5-8965-9e3da4fea1c9@w74g2000hsh.googlegroups.com>
Message-ID: <fvifuo$8dp$1@panix3.panix.com>

In article <286490d5-01ce-40c5-8965-9e3da4fea1c9 at w74g2000hsh.googlegroups.com>,
Jeff  <jeffober at gmail.com> wrote:
>
>Use lisp?

:-)))))))
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From gagsl-py2 at yahoo.com.ar  Sat May 24 21:36:58 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 22:36:58 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
Message-ID: <op.ubor3wt2x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>
>> Not to say that your concerns are pointless, and that things cannot be
>> improved somehow, but this is not that trivial, and there may be
>> ambuiguities in some not so rare cases.
>
> It might be worth considering an alternative approach here: a formatted
> exception includes the relevant source lines (where possible).

Just to note that the standard cgitb module already does that, among other things.

-- 
Gabriel Genellina



From mensanator at aol.com  Sat May 17 01:08:56 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 16 May 2008 22:08:56 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
Message-ID: <92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com>

On May 16, 11:43?pm, Sanoski <Joshuajr... at gmail.com> wrote:
> I'm pretty new to programming. I've just been studying a few weeks off
> and on. I know a little, and I'm learning as I go. Programming is so
> much fun! I really wish I would have gotten into it years ago, but
> here's my question. I have a longterm project in mind, and I wont to
> know if it's feasible and how difficult it will be.
>
> There's an XML feed for my school that some other class designed. It's
> just a simple idea that lists all classes, room number, and the person
> with the highest GPA. The feed is set up like this. Each one of the
> following lines would also be a link to more information about the
> class, etc.
>
> Economics, Room 216, James Faker, 3.4
> Social Studies, Room 231, Brain Fictitious, 3.5
>
> etc, etc
>
> The student also has a picture reference that depicts his GPA based on
> the number. The picture is basically just a graph. I just want to
> write a program that uses the information on this feed.
>
> I want it to reach out to this XML feed, record each instance of the
> above format along with the picture reference of the highest GPA
> student, download it locally, and then be able to use that information
> in various was. I figured I'll start by counting each instance. For
> example, the above would be 2 instances.
>
> Eventually, I want it to be able to cross reference data you've
> already downloaded, and be able to compare GPA's, etc. It would have a
> GUI and everything too, but I am trying to keep it simple right now,
> and just build onto it as I learn.
>
> So lets just say this. How do you grab information from the web,

Depends on the web page.

> in this case a feed,

Haven't tried that, just a simple CGI.

> and then use that in calculations?

The key is some type of structure be it database records,
or a list of lists or whatever. Something that you can iterate
through, sort, find max element, etc.

> How would you
> implement such a project?

The example below uses BeautifulSoup. I'm posting it not
because it matches your problem, but to give you an idea of
the techniques involved.

> Would you save the information into a text file?

Possibly, but generally no. Text files aren't very useful
except as a data exchange media.

> Or would you use something else?

Your application lends itself to a database approach.
Note in my example the database part of the code is disabled.
Not every one has MS-Access on Windows.

> Should I study up on SQLite?

Yes. The MS-Access code I have can be easily changed to SQLlite.

> Maybe I should study classes.

I don't know, but I've always gotten along without them.

> I'm just not sure. What would be the most effective technique?

Don't know that either as I've only done it once, as follows:

##  I was looking in my database of movie grosses I regulary copy
##  from the Internet Movie Database and noticed I was _only_ 120
##  weeks behind in my updates.
##
##  Ouch.
##
##  Copying a web page, pasting into a text file, running a perl
##  script to convert it into a csv file and manually importing it
##  into Access isn't so bad when you only have a couple to do at
##  a time. Still, it's a labor intensive process and 120 isn't
##  anything to look forwards to.
##
##  But I abandoned perl years ago when I took up Python, so I
##  can use Python to completely automate the process now.
##
##  Just have to figure out how.
##
##  There's 3 main tasks: capture the web page, parse the web page
##  to extract the data and insert the data into the database.
##
##  But I only know how to do the last step, using the odnc tools
##  from win32,

####import dbi
####import odbc
import re

##  so I snoop around comp.lang.python to pick up some
##  hints and keywords on how to do the other two tasks.
##
##  Documentation on urllib2 was a bit vague, but got the web page
##  after only a ouple mis-steps.

import urllib2

##  Unfortunately, HTMLParser remained beyond my grasp (is it
##  my imagination or is the quality of the examples in the
##  doumentation inversely proportional to the subject
##  difficulty?)
##
##  Luckily, my bag of hints had a reference to Beautiful Soup,
##  whose web site proclaims:
##      Beautiful Soup is a Python HTML/XML parser
##      designed for quick turnaround projects like
##      screen-scraping.
##  Looks like just what I need, maybe I can figure it out after all.

from BeautifulSoup import BeautifulSoup

target_dates = [['4','6','2008','April']]

####con = odbc.odbc("IMDB")  # connect to MS-Access database
####cursor = con.cursor()

for d in target_dates:
  #
  # build url (with CGI parameters) from list of dates needing
updating
  #
  the_year = d[2]
  the_date = '/'.join([d[0],d[1],d[2]])
  print '%10s scraping IMDB:'  % (the_date),
  the_url = ''.join([r'http://www.imdb.com/BusinessThisDay?
day=',d[1],'&month=',d[3]])
  req = urllib2.Request(url=the_url)
  f = urllib2.urlopen(req)
  www = f.read()
  #
  # ok, page captured. now make a BeatifulSoup object from it
  #
  soup = BeautifulSoup(www)
  #
  # that was easy, much more so than HTMLParser
  #
  # now, _all_ I have to do is figure out how to parse it
  #
  # ouch again. this is a lot harder than it looks in the
  # documentation. I need to get the data from cells of a
  # table nested inside another table and that's hard to
  # extrapolate from the examples showing how to find all
  # the comments on a web page.
  #
  # but this looks promising. if I grab all the table rows
  # (tr tags), each complete nested table is inside a cell
  # of the outer table (whose table tags are lost, but aren't
  # needed and whose absence makes extracting the nested
  # tables easier (when you do it the stupid way, but hey,
  # it works, so I'm sticking with it))
  #
  tr = soup.tr                          # table rows
  tr.extract()
  #
  # now, I only want the third nested table. how do I get it?
  # can't seem to get past the first one, should I be using
  # NextSibling or something? <scratches head...>
  #
  # but wait...I don't need the first two tables, so I can
  # simply extract and discard them. and since .extract()
  # CUTS the tables, after two extractions the table I want
  # IS the first one.
  #
  the_table = tr.find('table')          # discard
  the_table.extract()
  the_table = tr.find('table')          # discard
  the_table.extract()
  the_table = tr.find('table')          # weekly gross
  the_table.extract()
  #
  # of course, the data doesn't start in the first row,
  # there's formatting, header rows, etc. looks like it starts
  # in tr number [3]
  #
  ##  >>> the_table.contents[3].td
  ##  <td><a href="/title/tt0170016/">How the Grinch Stole Christmas
(2000)</a> </td>
  #
  # and since tags always imply the first one, the above
  # is equivalent to
  #
  ##  >>> the_table.contents[3].contents[0]
  ##  <td><a href="/title/tt0170016/">How the Grinch Stole Christmas
(2000)</a> </td>
  #
  # and since the title is the first of three cells, the
  # reporting year is
  #
  ##  >>> the_table.contents[3].contents[1]
  ##  <td> <a href="/Sections/Years/2001">2001</a> </td>
  #
  # finally, the 3rd cell must contain the gross
  #
  ##  >>> the_table.contents[3].contents[2]
  ##  <td align="RIGHT"> 259,674,120</td>
  #
  # but the contents of the first two cells are anchor tags.
  # to get the actual title string, I need the contents of the
  # contents. but that's not exactly what I want either,
  # I don't want a list, I need a string. and the string isn't
  # always in the same place in the list
  #
  # summarizing, what I need is
  #
  ##  print the_table.contents[3].contents[0].contents[0].contents,
  ##  print the_table.contents[3].contents[1].contents[1].contents,
  ##  print the_table.contents[3].contents[2].contents
  #
  # and that almost works, just a couple more tweaks and I can
  # shove it into the database

  parsed = []

  for rec in the_table.contents[3:]:
    the_rec_type = type(rec)                      # some rec are
NavSrings, skip
    if str(the_rec_type) == "<type 'instance'>":
      #
      # ok, got a real data row
      #
      TITLE_DATE = rec.contents[0].contents[0].contents   # a list
inside a tuple
      #
      # and that means we still have to index the contents
      # of the contents of the contents of the contents by
      # adding [0][0] to TITLE_DATE
      #
      YEAR =  rec.contents[1].contents[1].contents        # ditto
      #
      # this won't go into the database, just used as a filter to grab
      # the records associated with the posting date and discard
      # the others (which should already be in the database)
      #
      GROSS = rec.contents[2].contents                    # just a
list
      #
      # one other minor glitch, that film date is part of the title
      # (which is of no use in the database, so it has to be pulled
out
      # and put in a separate field
      #
#      temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
(.*)',str(TITLE_DATE[0][0]))
      temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
(.*)',str(TITLE_DATE))
      #
      # which works 99% of the time. unfortunately, the IMDB
      # consitency is somewhat dubious. the date is _supposed_
      # to be at the end of the string, but sometimes it's not.
      # so, usually, there are only 5 groups, but you have to
      # allow for the fact that there may be 6
      #
      try:
        the_title = temp_title.group(1) + temp_title.group(5)
      except:
        the_title = temp_title.group(1)
      the_gross = str(GROSS[0])
      #
      # and for some unexplained reason, dates will occasionally
      # be 2001/I instead of 2001, so we want to discard the trailing
      # crap, if any
      #
      the_film_year = temp_title.group(3)[:4]
#      if str(YEAR[0][0])==the_year:
      if str(YEAR[0])==the_year:
        parsed.append([the_date,the_title,the_film_year,the_gross])

  print '%3d records found ' % (len(parsed))
  #
  # wow, now just have to insert all the update records directly
  # into the database...into a temporary table, of course. as I said,
  # IMDB consistency is somewhat dubious (such as changing the
spelling
  # of the titles), so a QC check will be required inside Access
  #
####  if len(parsed)>0:
####    print '...inserting into database'
####    for p in parsed:
####      cursor.execute("""
####INSERT INTO imdweeks2 ( Date_reported, Title, Film_Date,
Gross_to_Date )
####SELECT ?,?,?,?;""",p)
####  else:
####    print '...aborting, no records found'
####
####cursor.close()
####con.close()

  for p in parsed: print p

# and just because it works, doesn't mean it's right.
# but hey, you get what you pay for. I'm _sure_ if I were
# to pay for a subscription to IMDBPro, I wouldn't see
# these errors ;-)



##You should get this:
##
##  4/6/2008 scraping IMDB: 111 records found
##['4/6/2008', "[u'I Am Legend']", '2007', ' 256,386,216']
##['4/6/2008', "[u'National Treasure: Book of Secrets']", '2007', '
218,701,477']
##['4/6/2008', "[u'Alvin and the Chipmunks']", '2007', ' 216,873,487']
##['4/6/2008', "[u'Juno']", '2007', ' 142,545,706']
##['4/6/2008', "[u'Horton Hears a Who!']", '2008', ' 131,076,768']
##['4/6/2008', "[u'Bucket List, The']", '2007', ' 91,742,612']
##['4/6/2008', "[u'10,000 BC']", '2008', ' 89,349,915']
##['4/6/2008', "[u'Cloverfield']", '2008', ' 80,034,302']
##['4/6/2008', "[u'Jumper']", '2008', ' 78,762,148']
##['4/6/2008', "[u'27 Dresses']", '2008', ' 76,376,607']
##['4/6/2008', "[u'No Country for Old Men']", '2007', ' 74,273,505']
##['4/6/2008', "[u'Vantage Point']", '2008', ' 71,037,105']
##['4/6/2008', "[u'Spiderwick Chronicles, The']", '2008', '
69,872,230']
##['4/6/2008', '[u"Fool\'s Gold"]', '2008', ' 68,636,484']
##['4/6/2008', "[u'Hannah Montana/Miley Cyrus: Best of Both Worlds
Concert Tour']", '2008', ' 65,010,561']
##['4/6/2008', "[u'Step Up 2: The Streets']", '2008', ' 57,389,556']
##['4/6/2008', "[u'Atonement']", '2007', ' 50,921,738']
##['4/6/2008', "[u'21']", '2008', ' 46,770,173']
##['4/6/2008', "[u'College Road Trip']", '2008', ' 40,918,686']
##['4/6/2008', "[u'There Will Be Blood']", '2007', ' 40,133,435']
##['4/6/2008', "[u'Meet the Spartans']", '2008', ' 38,185,300']
##['4/6/2008', "[u'Meet the Browns']", '2008', ' 37,662,502']
##['4/6/2008', "[u'Deep Sea 3D']", '2006', ' 36,141,373']
##['4/6/2008', "[u'Semi-Pro']", '2008', ' 33,289,722']
##['4/6/2008', "[u'Definitely, Maybe']", '2008', ' 31,973,840']
##['4/6/2008', "[u'Eye, The']", '2008', ' 31,397,498']
##['4/6/2008', "[u'Great Debaters, The']", '2007', ' 30,219,326']
##['4/6/2008', "[u'Bank Job, The']", '2008', ' 26,804,821']
##['4/6/2008', "[u'Other Boleyn Girl, The']", '2008', ' 26,051,195']
##['4/6/2008', "[u'Drillbit Taylor']", '2008', ' 25,490,483']
##['4/6/2008', "[u'Magnificent Desolation: Walking on the Moon 3D']",
'2005', ' 23,283,158']
##['4/6/2008', "[u'Shutter']", '2008', ' 23,138,277']
##['4/6/2008', "[u'Never Back Down']", '2008', ' 23,080,675']
##['4/6/2008', "[u'Mad Money']", '2008', ' 20,648,442']
##['4/6/2008', "[u'Galapagos']", '1955', ' 17,152,405']
##['4/6/2008', "[u'Superhero Movie']", '2008', ' 16,899,661']
##['4/6/2008', "[u'Wild Safari 3D']", '2005', ' 16,550,933']
##['4/6/2008', "[u'Kite Runner, The']", '2007', ' 15,790,223']
##['4/6/2008', '[u"Nim\'s Island"]', '2008', ' 13,210,579']
##['4/6/2008', "[u'Leatherheads']", '2008', ' 12,682,595']
##['4/6/2008', "[u'Be Kind Rewind']", '2008', ' 11,028,439']
##['4/6/2008', "[u'Doomsday']", '2008', ' 10,955,425']
##['4/6/2008', "[u'Sea Monsters: A Prehistoric Adventure']", '2007', '
10,745,308']
##['4/6/2008', "[u'Miss Pettigrew Lives for a Day']", '2008', '
10,534,800']
##['4/6/2008', "[u'M&#244;me, La']", '2007', ' 10,299,782']
##['4/6/2008', "[u'Penelope']", '2006', ' 9,646,154']
##['4/6/2008', "[u'Misma luna, La']", '2007', ' 8,959,462']
##['4/6/2008', "[u'Roving Mars']", '2006', ' 8,463,161']
##['4/6/2008', "[u'Stop-Loss']", '2008', ' 8,170,755']
##['4/6/2008', "[u'Ruins, The']", '2008', ' 8,003,241']
##['4/6/2008', "[u'Bella']", '2006', ' 7,776,080']
##['4/6/2008', "[u'U2 3D']", '2007', ' 7,348,105']
##['4/6/2008', "[u'Orfanato, El']", '2007', ' 7,159,147']
##['4/6/2008', "[u'In Bruges']", '2008', ' 6,831,761']
##['4/6/2008', "[u'Savages, The']", '2007', ' 6,571,599']
##['4/6/2008', "[u'Scaphandre et le papillon, Le']", '2007', '
5,990,075']
##['4/6/2008', "[u'Run Fatboy Run']", '2007', ' 4,430,583']
##['4/6/2008', "[u'Persepolis']", '2007', ' 4,200,980']
##['4/6/2008', "[u'Charlie Bartlett']", '2007', ' 3,928,412']
##['4/6/2008', "[u'Jodhaa Akbar']", '2008', ' 3,434,629']
##['4/6/2008', "[u'F&#228;lscher, Die']", '2007', ' 2,903,370']
##['4/6/2008', "[u'Bikur Ha-Tizmoret']", '2007', ' 2,459,543']
##['4/6/2008', "[u'Shine a Light']", '2008', ' 1,488,081']
##['4/6/2008', "[u'Race']", '2008', ' 1,327,606']
##['4/6/2008', "[u'Funny Games U.S.']", '2007', ' 1,274,055']
##['4/6/2008', "[u'4 luni, 3 saptam&#226;ni si 2 zile']", '2007', '
1,103,315']
##['4/6/2008', "[u'Married Life']", '2007', ' 1,002,318']
##['4/6/2008', "[u'Diary of the Dead']", '2007', ' 893,192']
##['4/6/2008', "[u'Starting Out in the Evening']", '2007', ' 882,518']
##['4/6/2008', "[u'Dolphins and Whales 3D: Tribes of the Ocean']",
'2008', ' 854,304']
##['4/6/2008', "[u'Sukkar banat']", '2007', ' 781,954']
##['4/6/2008', "[u'Bonneville']", '2006', ' 471,679']
##['4/6/2008', "[u'Flawless']", '2007', ' 390,892']
##['4/6/2008', "[u'Paranoid Park']", '2007', ' 387,119']
##['4/6/2008', "[u'Teeth']", '2007', ' 321,732']
##['4/6/2008', "[u'Hammer, The']", '2007', ' 321,579']
##['4/6/2008', "[u'Priceless']", '2008', ' 320,131']
##['4/6/2008', "[u'Steep']", '2007', ' 259,840']
##['4/6/2008', "[u'Honeydripper']", '2007', ' 259,192']
##['4/6/2008', "[u'Snow Angels']", '2007', ' 255,147']
##['4/6/2008', "[u'Taxi to the Dark Side']", '2007', ' 231,743']
##['4/6/2008', "[u'Cheung Gong 7 hou']", '2008', ' 188,067']
##['4/6/2008', "[u'Ne touchez pas la hache']", '2007', ' 184,513']
##['4/6/2008', "[u'Sleepwalking']", '2008', ' 160,715']
##['4/6/2008', "[u'Chicago 10']", '2007', ' 149,456']
##['4/6/2008', "[u'Girls Rock!']", '2007', ' 92,636']
##['4/6/2008', "[u'Beaufort']", '2007', ' 87,339']
##['4/6/2008', "[u'Shelter']", '2007', ' 85,928']
##['4/6/2008', "[u'My Blueberry Nights']", '2007', ' 74,146']
##['4/6/2008', "[u'T&#233;moins, Les']", '2007', ' 71,624']
##['4/6/2008', "[u'M&#233;pris, Le']", '1963', ' 70,761']
##['4/6/2008', "[u'Singing Revolution, The']", '2006', ' 66,482']
##['4/6/2008', "[u'Chop Shop']", '2007', ' 58,858']
##['4/6/2008', '[u"Chansons d\'amour, Les"]', '2007', ' 58,577']
##['4/6/2008', "[u'Praying with Lior']", '2007', ' 57,325']
##['4/6/2008', "[u'Yihe yuan']", '2006', ' 57,155']
##['4/6/2008', "[u'Casa de Alice, A']", '2007', ' 53,700']
##['4/6/2008', "[u'Blindsight']", '2006', ' 51,256']
##['4/6/2008', "[u'Boarding Gate']", '2007', ' 37,107']
##['4/6/2008', "[u'Voyage du ballon rouge, Le']", '2007', ' 35,222']
##['4/6/2008', "[u'Bill']", '2007', ' 35,201']
##['4/6/2008', "[u'Mio fratello &#232; figlio unico']", '2007', '
34,138']
##['4/6/2008', "[u'Chapter 27']", '2007', ' 32,602']
##['4/6/2008', "[u'Meduzot']", '2007', ' 25,352']
##['4/6/2008', "[u'Shotgun Stories']", '2007', ' 25,346']
##['4/6/2008', "[u'Sconosciuta, La']", '2006', ' 18,569']
##['4/6/2008', "[u'Imaginary Witness: Hollywood and the Holocaust']",
'2004', ' 18,475']
##['4/6/2008', "[u'Irina Palm']", '2007', ' 14,214']
##['4/6/2008', "[u'Naissance des pieuvres']", '2007', ' 7,418']
##['4/6/2008', "[u'Four Letter Word, A']", '2007', ' 6,017']
##['4/6/2008', "[u'Tuya de hun shi']", '2006', ' 2,619']



From skanemupp at yahoo.se  Sat May 31 10:01:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 31 May 2008 07:01:58 -0700 (PDT)
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
Message-ID: <2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>

On 31 Maj, 14:48, globalrev <skanem... at yahoo.se> wrote:
> On 31 Maj, 04:04, John Henderson <jhenRemoveT... at talk21.com> wrote:
>
>
>
> > globalrev wrote:
> > > can i send and receive messages from a website using python?
>
> > Absolutely.  But I'm not clear what you mean by "from a
> > website".  Do you mean to use SMPP protocol to lodge and
> > receive messages?  Or do you want access to your own cellular
> > hardware from a web interface?
>
> > > how would that work with costs? would the mobileowner pay both
> > > ways?
>
> > That depends on the country, the carrier and the offers/plans
> > that carrier makes.  In most of the civilized world, SMS
> > receivers pay nothing.
>
> > John
>
> i want to build a service where you can send an SMS with your
> cellphone to my website and then the site will collect the data you
> asked for and SMS it back.
>
> so what components would i need for that?


also, lets say i want to send a SMS to my own phone from the internet.
how would i do that?


From gagsl-py2 at yahoo.com.ar  Sun May 25 12:05:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 13:05:31 -0300
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <op.ubpwbhwsx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 03:37:00 -0300, <notnorwegian at yahoo.se> escribi?:

> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
>
> so obv i want fast insert. i want to delete duplicates too.
>
> which datastructure is best for this?

Use a list, and the bisect module to keep it sorted:

py> import bisect
py> def insert_nodupes(slist, item):
...   i = bisect.bisect_left(slist, item)
...   if i>=len(slist) or slist[i] != item:
...     slist.insert(i, item)
...
py> items = []
py> insert_nodupes(items, 'link to some site')
py> insert_nodupes(items, 'another link')
py> insert_nodupes(items, 'third site')
py> insert_nodupes(items, 'another link')
py> items
['another link', 'link to some site', 'third site']

-- 
Gabriel Genellina



From arnodel at googlemail.com  Fri May  2 14:23:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 02 May 2008 19:23:54 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
Message-ID: <m21w4kbm4l.fsf@googlemail.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

>
> There are no modern processors with an opcode for incrementing a memory
> location!?  At least my C64 can do that.  ;-)

Indeed!  I remember a simple use was to make the border change colour
very fast, a v. cool effect when you're 12!
 
        CLV
LOOP:   INC $D020
        BVC LOOP

(from memory, untested!)

-- 
Arnaud


From goldspin at gmail.com  Sun May 18 15:13:34 2008
From: goldspin at gmail.com (Henry Chang)
Date: Sun, 18 May 2008 12:13:34 -0700
Subject: What's the api tat I should use to connect python to a MS Access
	Db?
In-Reply-To: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>
References: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>
Message-ID: <fee514130805181213t1beda90ao3dd844cc5f4da372@mail.gmail.com>

A simple google search:
http://bytes.com/forum/thread637384.html

On Sun, May 18, 2008 at 10:57 AM, David Anderson <zerty.david at gmail.com>
wrote:

> Please answer me the question of the subject =)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bignose+hates-spam at benfinney.id.au  Tue May 20 23:34:15 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 May 2008 13:34:15 +1000
Subject: Code/test ratio wrt static vs dynamic typing
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
	<69hi0iF32kli9U1@mid.individual.net>
Message-ID: <87bq30gwjs.fsf@benfinney.id.au>

greg <greg at cosc.canterbury.ac.nz> writes:

> Also, I don't think it's valid to equate the size of the tests with
> the amount of effort it took to develop them. For instance, the test
> suite for Pyrex is currently larger than the Pyrex compiler, but
> I've still spent far more time and effort developing the compiler
> than writing the tests.

Right. The unit test suite should tend to increase: add tests far more
often than removing them. The application code, though, should tend to
grow less rapidly: refactor duplication, remove redundant code, and
add new code.

This should tend to result in the unit test suite growing over time
faster than the application code does, even if roughly the same effort
goes into both. Thus the size of each is not a good indicator of the
amount of effort.

-- 
 \           "I got a postcard from my best friend, it was a satellite |
  `\      picture of the entire Earth. On the back he wrote, 'Wish you |
_o__)                                   were here'."  -- Steven Wright |
Ben Finney


From mensanator at aol.com  Fri May 30 20:59:03 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 17:59:03 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com> 
	<mailman.1786.1212191104.12834.python-list@python.org>
Message-ID: <30b8b4ff-f0e5-4178-b9f7-513a5e404982@z72g2000hsb.googlegroups.com>

On May 30, 6:44?pm, Joshua Kugler <jkug... at bigfoot.com> wrote:
> Skonieczny, Chris wrote:
> > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> >http://mail.python.org/pipermail/python-list/2007-February/427841.html
>
> > It is not true - eg. try :
> > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > b=int(a)
> > and what you will get ? An error !!!
>
> > Or probably you yourself should - quote :
> > "You probably should go through the tutorial ASAP that is located here:
>
> >http://docs.python.org/tut/"
>
> int() converts a strings that is a valid intenter. ?What you're looking for
> is ord().

Possibly. Perhaps the OP wants the position of 'P'
in the alphabet, in which case he wants b=64-ord(a)
or b=16.

>
> In [1]: ord('d')
> Out[1]: 100
>
> In [2]: a='P'
>
> In [3]: b=ord(a)
>
> In [4]: b
> Out[4]: 80
>
> j



From sjmachin at lexicon.net  Sat May 17 10:19:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 17 May 2008 14:19:56 GMT
Subject: Distributing applications that use 3rd party modules
In-Reply-To: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <482ee989@news.mel.dft.com.au>

eliben wrote:
> Hello,
> 
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
> 
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
> 
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
> 
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.

What do you call "huge"?

In my environment the end-users don't have Python installed on their own 
PCs, but the team does have a networked shared drive; we put py2exe'd 
applications there. Less complaints about app load time than for things 
like Word/Excel/Outlook, and no complaints from me about distribution, 
and no worries about users running old versions.

Cheers,
John


From prudek at bvx.cz  Sun May 25 03:26:23 2008
From: prudek at bvx.cz (Milos Prudek)
Date: Sun, 25 May 2008 09:26:23 +0200
Subject: module import problem
In-Reply-To: <g1a5ku$b70$01$1@news.t-online.com>
References: <mailman.1545.1211668266.12834.python-list@python.org>
	<g1a5ku$b70$01$1@news.t-online.com>
Message-ID: <200805250926.23422.prudek@bvx.cz>


> Reinstall the package "python-gnupginterface" with "sudo aptitude reinstall

Your advice helped! Upgrade is running now. Thanks!

-- 
Milos Prudek


From kyosohma at gmail.com  Fri May  2 15:13:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 12:13:16 -0700 (PDT)
Subject: pil:effbot and pythonware offline
References: <8a2150b5-dfbf-419b-af10-af88932584ff@8g2000hse.googlegroups.com>
Message-ID: <84e9f4c6-4f34-4331-8815-8f69e9fde500@f63g2000hsf.googlegroups.com>

On May 1, 5:15 pm, spdegabrielle <spdegabrie... at gmail.com> wrote:
> Sorry, I'm new to python and was trying to get imageTK;
> this led me to try find PIL, but pythonware and effbot both seem to be
> offline.
>
> I can't find any mention of an outage on python.org, this newsgroup,
> or the planet-blogs.
>
> Is it just me? and does anyone know where I can find ImageTK?
>
> Cheers,
>
> stephen

They both seem to be up now. Maybe there was some simultaneous server
maintenance?

Mike


From paddy3118 at googlemail.com  Thu May 15 01:47:17 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 14 May 2008 22:47:17 -0700 (PDT)
Subject: Sanitised Newsgroup Feeds?
Message-ID: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>

Hi,
Does anyone do a sanitised newsgroup feed? Something like what mail
filters do for email?

It is getting tedious wading through the ads for 'cracks' & watches;
as well as the Xah cross-posted self-promotions, the wx-'its easier to
post than read the tutorial' annoyances and the castiro (human/Eliza?)
weirdnesses.
I guess that many would want to add the same things to their kill
file,  but it takes me three clicks to add anyone/any thread to it and
the c.l.p signal-to-noise is getting lower.

I'd like to thank the posters of the weekly summary - it's great and I
will continue to read it, but It is more fun reading and posting to
Python blog-posts via a Google Reader search, than it is c.l.p

Python popularity is a double-edged sword.

- Paddy.


From miki.tebeka at gmail.com  Mon May 26 14:31:09 2008
From: miki.tebeka at gmail.com (Miki)
Date: Mon, 26 May 2008 11:31:09 -0700 (PDT)
Subject: Using Python to unit test C code
References: <mailman.1621.1211825961.12834.python-list@python.org>
Message-ID: <451913de-b548-4c42-9b72-b262663e8482@x19g2000prg.googlegroups.com>

Hello,

> I would like to hear any information about how to unit test C code using Python.
I never done it, but you can either generate a Python wrapper (using
SWIG, Boost.Python, Pyrex ...) and then test the wrapper, or directly
call the C module functions using ctypes.

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com


From bignose+hates-spam at benfinney.id.au  Sat May  3 02:05:41 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 16:05:41 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <87r6cjylai.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> The shebang line (the initial line of the file beginning with "#!")
> takes advantage of OS kernels that determine how to execute a file
> based on the first few bytes of the file. The shebang line tells the
> kernel that this file should be executed by passing it as input to a
> process started by another command.
> 
> The specified command takes the form of a fully-qualified file path,
> and zero or one arguments to the program. That command is then
> executed by the kernel, and the Python program file is passed as
> input to the resulting process.

As was pointed out later in the thread, this description is partially
untrue. The program isn't passed as input to the interpreter.

Instead, the path to the program is appended as a command-line
argument to the interpreter. Thus the kernel starts a command of the
form:

    <word after the shebang> <optional single argument after the first word> <path to the program>

Examples:

    filename:              /home/foo/bar.py
    shebang line:          #! /usr/bin/python
    command line invoked:  /usr/bin/python /home/foo/bar.py

    filename:              /home/foo/Makefile
    shebang line:          #! /usr/bin/make -f
    command line invoked:  /usr/bin/make -f /home/foo/Makefile

For more information on shebang processing, see
<URL:http://foldoc.org/index.cgi?shebang> for a basic description, and
<URL:http://www.in-ulm.de/~mascheck/various/shebang/> for lots of gory
detail.

-- 
 \               "There's no excuse to be bored. Sad, yes. Angry, yes. |
  `\    Depressed, yes. Crazy, yes. But there's no excuse for boredom, |
_o__)                                       ever."  -- Viggo Mortensen |
Ben Finney


From tarun.kap at gmail.com  Fri May  2 14:23:28 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 11:23:28 -0700 (PDT)
Subject: calling variable function name ?
References: <cf179899-177f-4516-95dd-f368eaf7c6a7@f63g2000hsf.googlegroups.com>
	<ad02220c-294c-4c6a-bc61-3165bf5ab08e@f63g2000hsf.googlegroups.com> 
	<57461074-8fd1-4e65-9bc9-2ac916aa1fb5@y21g2000hsf.googlegroups.com> 
	<m28wyvba54.fsf@googlemail.com>
Message-ID: <b2d6c91e-2c97-4964-b094-d14bf32a71ad@f63g2000hsf.googlegroups.com>

On Apr 30, 11:05 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> TkNeo<tarun.... at gmail.com> writes:
>
> > George - Thanks for your reply but what you suggested is not working:
>
> > def FA(param1,param2):
> >     print "FA" + param1 + " " + param2
> > def FA(param1,param2):
> >     print "FB" + param1 + " " + param2
> > def FA(param1,param2):
> >     print "FC" + param1 + " " + param2
>
> > temp = sys.argv[1]
>
> > func = globals()["F" + temp]
> > func("Hello", "World")
>
> > I ran the script with first parameter as B and i get the following
> > message
> > KeyError: 'FB'
>
> Perhaps if you call your three function FA, FB, FC instead of FA, FA,
> FA it'll help?
>
> --
> Arnaud

oh crap. I can't believe I was doing that ! :) Thanks for pointing
out. works perfect.



From gagsl-py2 at yahoo.com.ar  Sat May 24 15:54:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 16:54:08 -0300
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
	<vochg5-bo9.ln1@buckbeak.hogwarts>
Message-ID: <op.ubob8inqx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 20:38:39 -0300, Andreas Matthias <amat at kabsi.at> escribi?:

> inhahe at gmail.com wrote:
>
>> actually i ddin't think about the fact that you're overloading dict, which
>> can already take multiple values in getitem
>
> Oh, I didn't know that. I totally misinterpreted the error message.
>
>
>> so how about
>>
>> class crazy: pass
>>
>> and then in your dict class:
>>
>> def __getitem__(*args):
>
> Apparently, args already is a tuple, so this should be:
>
>   def __getitem__(self, args):
>
> Is this documented somewhere? I couldn't find it anywhere.

No, that's not correct. First, there is nothing special with the arguments to dict.__getitem__ -- except that the syntax obj[index] provides a delimiter and it allows for obj[a,b] as a shortcut for obj[(a,b)] -> obj.__getitem__((a,b))

You may use the *args notation in any function; it is always a tuple (a singleton, when you call the function with only one argument)

py> def foo(*args): print args
...
py> foo(1)
(1,)
py> foo(1,2)
(1, 2)
py> foo((1,2))
((1, 2),)

Compare with:

py> def bar(arg): print arg
...
py> bar(1)
1
py> bar(1,2)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: bar() takes exactly 1 argument (2 given)
py> bar((1,2))
(1, 2)

-- 
Gabriel Genellina



From tjreedy at udel.edu  Thu May  8 20:31:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 20:31:30 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>
Message-ID: <g0060u$97s$1@ger.gmane.org>


"Jon Harrop" <jon at ffconsultancy.com> wrote in message 
news:5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d at plusnet...
| Perhaps the best example I can think of to substantiate your original 
point
| is simple comparison because Mathematica allows:
|
|  a < b < c
|
| I wish other languages did.

Python does also. 





From kay.schluehr at gmx.net  Fri May 23 00:54:40 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 22 May 2008 21:54:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <2f34b8a9-9334-44f0-bb24-6dba373d643f@z72g2000hsb.googlegroups.com>

On 13 Mai, 01:39, Dave Parker <davepar... at flamingthunder.com> wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder athttp://www.flamingthunder.com/ , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

"Why on earth shall kids program and even more serious: why shall I
program in a language for kids?"




From mathieu.prevot at ens.fr  Sat May 24 09:18:47 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Sat, 24 May 2008 15:18:47 +0200
Subject: PIPE stderr
Message-ID: <3e473cc60805240618v12661458gacb174df7de81cc3@mail.gmail.com>

Hi again,

I don't have the same ouptput between 1) and 2) ... what's happening ?

1)
wget http://www.youtube.com/v/A8bwZf3vXjg -O /dev/null 2> file

2)
k = Popen (["wget", "http://www.youtube.com/v/A8bwZf3vXjg", "-O", "/dev/null"],
stderr=PIPE)
print k.stderr

In the case 2) I got:

open file '<fdopen>', mode 'rb' at 0x5a608>

and I want what I get in file from 1) ... how to do this ?

Mathieu


From mail at timgolden.me.uk  Wed May  7 10:19:31 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 15:19:31 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>	<48216129.5090405@timgolden.me.uk>	<mailman.698.1210153360.12834.python-list@python.org>
	<f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>
Message-ID: <4821BA73.7070600@timgolden.me.uk>

Mike Driscoll wrote:
> On May 7, 4:45 am, Tim Golden <m... at timgolden.me.uk> wrote:
>> In a spirit of being helpful... :)

[... snip registry walker ...]

> This is pretty cool stuff, Tim. Of course, it would also seriously
> screw up some programs if you decided to replace the wrong phrase.
> Just a word of warning to the OP: be sure to make a backup of the
> registry before doing something like this. Trying to fix a messed up
> registry from the command line is not a fun way to spend the
> afternoon.

Good point, Mike. In a spirit of being even more helpful... the _winreg
module includes the functions SaveKey and LoadKey so as a crude
backup mechanism, you could do this:

<code snippet>
import time
import _winreg
import win32api
import win32security

#
# You need to have SeBackupPrivilege enabled for this to work
#
priv_flags = win32security.TOKEN_ADJUST_PRIVILEGES | win32security.TOKEN_QUERY
hToken = win32security.OpenProcessToken (win32api.GetCurrentProcess (), priv_flags)
privilege_id = win32security.LookupPrivilegeValue (None, "SeBackupPrivilege")
win32security.AdjustTokenPrivileges (hToken, 0, [(privilege_id, win32security.SE_PRIVILEGE_ENABLED)])

root = _winreg.OpenKey (_winreg.HKEY_LOCAL_MACHINE, r"Software\Python\TEST")
#
# This will fail if the file already exists so make it uniqueish
#
_winreg.SaveKey (root, "c:/temp/HKLM_Software_Python-%s.reg" %  time.strftime ("%Y%m%d-%H%M%S"))

</code snippet>

Note that the file which this creates is *not* the same as a .reg file which the File > Export menu
option provides from within the registry editor. (In fact, I shouldn't really have called it .reg; call
it something else). It can be reloaded by the _winreg.LoadKey function -- which I notice is incorrectly 
named RegLoadKey in the docs after the underlying API call. The docs note that SeRestorePrivilege is 
required for this action, the counterpart to SeBackupPrivilege.

TJG



From jeffrey at fro.man  Tue May  6 10:24:08 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 06 May 2008 07:24:08 -0700
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>

notbob wrote:
> I'm running 
> vers 2.5.1 on slackware 12.

Nice to see another Slackware user around here!


> "Here is an example of a user-defined function that has a parameter:
> 
> 
> def print_twice(bruce):
>     print bruce, bruce
<snip>
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet?

That's correct. A function doesn't generally *do* anything until it is
called. Here, it is only defined. The only thing this function does when
called is to print the value of bruce twice.

> I define myfirstfunction in the pyth 
> editor and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

Functions are objects too, and this is a printed representation of that
function object. It still hasn't been "called" at this point.


> ....when I add the ._doc_, it get this:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'function' object has no attribute '_doc_'
> ....so, there is a no go there, too.

The functions docstring is stored in the attribute named "__doc__". Like
other python "special" attributes, it starts and ends with TWO underscores.


> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

You are correct to create this script yourself from scratch.


> I then try an do the import thing above, but the pyth ed accepts none of
> it. not from:
> from ~/pyth/chap03/ import *
> from chap03 import *            #taken from ~/pyth/
> ....nor from any other configuration I can imagine, so that "from" command
> makes no sense.

Modules are imported from your PYTHONPATH, which is a search path similar to
bash's PATH: It is a list of directories that are searched for *module*
names when you attempt an import. You can examine your python path by
doing:

>>> import sys
>>> sys.path

Your module files, i.e., chap03.py, should be in one of the directories on
that path.

"from" modifies a *module* name, not a path component. So "from module
import one_function, another_function". This allows you to use one_function
without referencing it through the imported module name. In other words,
these two are equivalent:

>>> import chap03
>>> chap03.print_twice()

and:

>>> from chap03 import print_twice
>>> print_twice()

In the above examples, "chap03" is the *module* file, chap03.py.


Hope that helps clarifies things a bit,
Jeffrey


From hans at poltras.com  Wed May 28 13:50:05 2008
From: hans at poltras.com (Hans Larsen)
Date: Wed, 28 May 2008 13:50:05 -0400
Subject: Problem with subprocess and mkstemp
Message-ID: <F6736732-8348-4221-B6B9-91141C044096@poltras.com>

Hello,

I'm having this script here:
----
import sys, tempfile, subprocess
if len(sys.argv) > 1:
	i = 0
	while i < 1000:
		print "Hello World" * 500
		i = i + 1
	exit( 1 )

h,fp = tempfile.mkstemp()
print "out: " + fp
out = open(fp, "r")
proc = subprocess.Popen( [sys.argv[0], "1"], stdout = h )
while proc.poll() is None:
	o = out.read()
	if o:
		print o
print out.read()
print "The end"
----

This scripts work wonders on Windows (and I've heard Linux is doing  
well too tyvm - although if one of you could check, I don't have a  
linux ready), but on OSX it outputs nothing. If I change the stdout of  
the subprocess for a pipe, it works well.

I cannot confirm that the bug comes from Python, but I'm pretty sure  
this should work normally. Does anyone know of this problem? Is there  
a workaround? A fix, maybe?

We're using temporary files because a pipe hangs out with large  
output, such as this one.

Thanks a lot,
Hans Larsen
--
My definition of an expert in any field is a person who knows enough  
about what's really going on to be scared.
P. J. Plauger
Computer Language, March 1983

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From gagsl-py2 at yahoo.com.ar  Fri May  2 14:49:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 15:49:47 -0300
Subject: i want to add a timeout to my code
References: <53ffe104-be3b-43e2-b5c8-4ce5886ac60d@b1g2000hsg.googlegroups.com>
	<1f70ea43-7909-4bd8-b63d-2467e8a0542f@c65g2000hsa.googlegroups.com>
	<ac8721f0-fe0d-446b-8954-bd097e6d940a@f24g2000prh.googlegroups.com>
	<mailman.351.1209508222.12834.python-list@python.org>
	<2976bcad-e514-4a33-bf1a-5966997b6d42@1g2000prg.googlegroups.com>
Message-ID: <op.uajik90px6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 17:06:20 -0300, maehhheeyy <maehhheeyy at gmail.com>  
escribi?:
> On Apr 29, 3:29?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>> On Tue, 2008-04-29 at 14:47 -0700, maehhheeyy wrote:
>> > On Apr 17, 4:24 pm, Miki <miki.teb... at gmail.com> wrote:
>> > > On Apr 17, 1:10 pm,maehhheeyy<maehhhe.. at gmail.com> wrote:
>>
>> > > > I want to add a timeout so that when I pull out my gps from my  
>> serial
>> > > > port, it would wait for a bit then loop and then see if it's  
>> there. I
>> > > > also want to add a print statement saying that there is no GPS  
>> device
>> > > > found. However when I run my code and unplug my serial port, my  
>> code
>> > > > will just hang until I plug it back in.
>> > > > This is my code right now:
>>
>> > > > def GetGPS():
>> > > > ? ? ? data = []
>> > > > ? ? ? #Open com1: 9600,8,N,1
>> > > > ? ? ? fi = serial.Serial(0, timeout = 1)
>> > > > ? ? ? print '[gps module] SERIAL PORT OPEN ON COM1:'
>>
>> > >http://docs.python.org/lib/node545.html
>>
>> > I tried the code onto my codes but what came out was that in the line
>> > signal.signal(signal.SIGSLRM, handler), an attributeError appeared
>> > reading that 'module' object has no attribute 'SIGALRM'
>> > --
>> Are you writing your program on windows, or some other platform which is
>> not unix?
>>
> Yeah I'm using Windows 2000.

signal doesn't work on Windows. The timeout parameter to Serial should  
suffice...

-- 
Gabriel Genellina



From meesters at uni-mainz.de  Thu May 29 09:28:20 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Thu, 29 May 2008 15:28:20 +0200
Subject: seg. fault with Py_BuildValue?
Message-ID: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>

Hi

I'm having trouble with Py_BuildValue. I was able to pinpoint the following
statement as the one causing a seg. fault with my script:

static PyObject * funcname(PyObject *self, PyObject *args) {
...
  return Py_BuildValue("(OO)", x, y);
}
where x & y are both of type PyObject.

Any suggestions here? Do I need to handle the output of Py_BuildValue
somehow before returning? How? Need to decref x & y before returning?

TIA
Christian


From wxPythoner at gmail.com  Sun May 11 08:54:45 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 05:54:45 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
Message-ID: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>

To create a tuple with one element, you need to do this:

>>> my_tuple = (1,)    # Note the trailing comma after the value 1
>>> type(my_tuple)
<type 'tuple'>


But if you do this

>>> my_tuple = (1)
>>> type(my_tuple)
<type 'int'>

you don't get a tuple. I thought that just putting a value inside ( )
would make a tuple. Apparently that is not the case. I hate ugly code
so it would be clean if Python would convert anything put into ( ) to
be a tuple, even if just one value was put in (without having to use
that ugly looking comma with no value after it).


From Joshuajruss at gmail.com  Sun May 18 08:18:26 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sun, 18 May 2008 05:18:26 -0700 (PDT)
Subject: secret code?
Message-ID: <5bc52ed9-855e-4569-b3bd-a0c1ab6941d7@k37g2000hsf.googlegroups.com>

What would you guys says about this secret code? The key was
apparently lost. The guy never sent it, and he was never seen again.
It must stand for letters in the alphabet, but it almost looks like
trajectory tables. I don't know. What do you guys think?

http://i243.photobucket.com/albums/ff273/ezname420/code.jpg


From wuwei23 at gmail.com  Mon May 12 22:57:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 19:57:01 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
	<f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>
Message-ID: <d9eb4e04-5a9a-4c8a-b775-1410595cf65d@y18g2000pre.googlegroups.com>

On May 13, 5:50 am, JustMe <alastair.gra... at gmail.com> wrote:
> I'm in the same boat. My work seems fixated with .Net but IMHO I think
> they would be better off going with Python. Still, who am I to stand
> in the way of hundreds of .Net programmers.

You could always be the hero who teaches them IronPython :)

- alex23


From python at bdurham.com  Wed May 14 16:10:24 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 14 May 2008 16:10:24 -0400
Subject: enumerate() values starting at 1 vs. 0
In-Reply-To: <C7EBDB03-FEF1-4026-8CAB-057447D0B472@gmail.com>
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
	<1210795102.6483.1253187515@webmail.messagingengine.com>
	<C7EBDB03-FEF1-4026-8CAB-057447D0B472@gmail.com>
Message-ID: <1210795824.8556.1253189577@webmail.messagingengine.com>

Arnaud,

>> Is there any way to have enumerate() start at 1 vs. 0?
>>
>> The problem with starting at 0 is that many things in the real world
>> begin at 1 - like line numbers or labels in a list.

> I suppose you could redefine enumerate to support an optional argument:
> 
> from itertools import izip, count
> 
> def enumerate(iterable, start=0):
>      return izip(count(start), iterable)
> 
>  >>> list(enumerate('spam', 1))
> [(1, 's'), (2, 'p'), (3, 'a'), (4, 'm')]

Brilliant!! 

Thank you,
Malcolm


From castironpi at gmail.com  Wed May 14 11:44:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 08:44:18 -0700 (PDT)
Subject: PPyGui emulator
References: <mailman.1087.1210718589.12834.python-list@python.org> 
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
	<mailman.1116.1210769697.12834.python-list@python.org>
Message-ID: <64ea7e01-9355-4cf2-ba47-2efab79f912e@i76g2000hsf.googlegroups.com>

On May 14, 7:54?am, pyt... at bdurham.com wrote:
> Stef,
>
> Looks great!!
>
> Malcolm

Nice touch on the Spin / Slider / Progress.  Wink.


From paddy3118 at googlemail.com  Sat May 24 18:44:27 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 24 May 2008 15:44:27 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <fdc3b499-e029-4008-80e2-ace3f781f8c7@59g2000hsb.googlegroups.com>

On May 24, 3:14 pm, Fuzzyman <fuzzy... at gmail.com> wrote:
> On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
>
> > From whom are you trying to hide your attributes?
>
> Actually, 'data hiding', although vastly overused by the static crowd
> can be a reasonable thing to want.
>
> For example, at Resolver Systems we expose the spreadsheet object
> model to our users. It hasa public, documented, API - plus a host of
> undocumented internally used methods.
>
> We would really *much* rather hide these, because anything our
> customers start using (whether documented or not) we will probably
> have to continue supporting and maintaining.
>
> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.

"We told you not to use it in the API Docs"
"Those names with leading undoerscores means _DO_NOT_USE_IT"
"THose methods whose docstrings say DO NOT USE EXTERNALLY"

And if they still use them, then they'd be problematic no matter what
language was used.

Customers ey?
Can't live without 'em...
... Actually that's customers Sir!

:-)

- Paddy.



From rsoh.woodhouse at googlemail.com  Wed May 28 15:14:44 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 12:14:44 -0700 (PDT)
Subject: Threads and import
Message-ID: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>

Hi,

I'm trying to work out some strange (to me) behaviour that I see when
running a python script in two different ways (I've inherited some
code that needs to be maintained and integrated with another lump of
code). The sample script is:

# Sample script, simply create a new thread and run a
# regular expression match in it.
import re

import threading
class TestThread(threading.Thread):

    def run(self):
        print('start')
        try:
            re.search('mmm', 'mmmm')
        except Exception, e:
            print e
        print('finish')

tmpThread = TestThread()
tmpThread.start()
tmpThread.join()
import time
for i in range(10):
    time.sleep(0.5)
    print i

# end of sample script

Now if I run this using:

$ python ThreadTest.py

then it behaves as expected, ie an output like:

start
finish
0
1
2
...

But if I run it as follows (how the inherited code was started):

$ python -c "import TestThread"

then I just get:

start


I know how to get around the problem but could someone with more
knowledge of how python works explain why this is the case?

Thanks,
Rowan


From fiacre.patrick at gmail.com  Fri May 23 03:00:55 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:00:55 -0400
Subject: Write bits in file
In-Reply-To: <puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
Message-ID: <48366bcb$0$15164$607ed4bc@cv.net>

Tim Roberts wrote:
> Monica Leko <monica.leko at gmail.com> wrote:
>> I have a specific format and I need binary representation.  Does
>> Python have some built-in function which will, for instance, represent
>> number 15 in exactly 10 bits?
> 
> For the record, I'd like to point out that even C cannot do this.  You need
> to use shifting and masking to produce a stream of 8-bit bytes, or to
> extract your values from a stream of 8-bit bytes.


Hmmmm, bitfields are exactly non-aligned bits in a structure and are 
part of ANSI C.  Although C gives no guarantee of the ordering of fields 
within machine words ... so bitfieds are of limited use in portable 
programs unless they are 0-initialized.

IIRC, Huffman code uses arbitrary length bit strings and is the basis of 
many compression algorithms.






From martin at v.loewis.de  Fri May  2 15:41:48 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 21:41:48 +0200
Subject: IPv6 and Python
In-Reply-To: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <481B6E7C.2020602@v.loewis.de>

> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?

Information is spread widely. If you really want resources, I recommend
to google for them; there are various IPv6 howtos.

Here is how I would do it:

On Linux, "modprobe ipv6", then "ifconfig". This should display the
loopback adapter, with the address "::1". You should then be able to
listen on that address, and connect to it.

On Windows (XP SP2), "netsh int ipv6 install". Again, you should be able
to use IPv6 loopback afterwards.

If you want true connectivity to the global IPv6 internet, I recommend
SixXS (http://www.sixxs.net/). You can setup a tunnel to the IPv6 net
through your IPv4 POP, using a close IPv6 POP who participates in SixXS.
To set up the tunnel, you then use aiccu, which works really well for
me (and is packaged conveniently as a Debian package).

Regards,
Martin


From rdm at rcblue.com  Sat May 17 22:37:16 2008
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 May 2008 19:37:16 -0700
Subject: r' question
Message-ID: <20080518023835.61FE61E4009@bag.python.org>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080517/18d40ad6/attachment-0001.html>

From inhahe at gmail.com  Wed May 21 12:05:29 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 12:05:29 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
Message-ID: <FJXYj.78134$%15.20121@bignews7.bellsouth.net>


<cokofreedom at gmail.com> wrote in message 
news:06ea8b72-598e-4455-b3f9-e614ddb6ad94 at p25g2000hsf.googlegroups.com...
> On May 21, 4:57 pm, "inhahe" <inh... at gmail.com> wrote:
>> one of the few things i miss from C is being able to use assignment in
>> expressions.   that's the only thing, really.
>> also there's no switch/case, you have to use a dictionary of functions
>> instead, although i rarely need that, usually i just use elif.
>
> One thing I hate from C is the assignment in expressions...Forcing
> myself to write
> 0 == Something
> rather than
> Something == 0

interesting trick, i've never thought of that/seen it
although if Python implemented it I think it should default to giving 
warnings when you use = in an expression, that way you don't have to worry.

> just to make sure I was mistakenly assigning values in statements is
> annoying, it ruins the ease of reading.
>
> I kind of agree with the select:case, but I think a key issue is how
> to implement it. Elif is reasonable for now.
>
> Diez, true I guess, but then we haven't seen what these expressions
> are, and why there has to be three. 




From bruno.42.desthuilliers at websiteburo.invalid  Mon May  5 10:38:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 05 May 2008 16:38:58 +0200
Subject: confused about self, why not a reserved word?
In-Reply-To: <9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
	<b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <481f1c02$0$4907$426a74cc@news.free.fr>

globalrev a ?crit :
> sorry i noticed now a little error, i was playing around a lot and saw
> that on the sel-example i had then called foo.hello() instead of
> foo.Hello().
> 
> 
> but it was an informing error now i egt it. was wondering about self
> anyway so thanks for clearing it up.
> 
> 
> but it still is a bit confusing that u can pass with any word.
> wouldnt:
> 
> 
> class Foo(object):
> 	def Hello():
> 		print "hi"
> 
> 
> make more sense?

What would make sens in your example would be to either make hello a 
staticmethod, since it doesn't use any reference to the current instance 
nor it's class.


> the class-thing seems inside out somehow in python.

Python's object model is indeed a bit pecular wrt/ most mainstream 
OOPLs. But once you understand how it works, it happens to be mostly 
well designed (IMHO) and really powerful.

> if im doing
> foo.Hello() im already saying that im using the class foo because i
> did foo=Foo()

Nope. You are saying your using an instance of class Foo.

> before and then still when calling Hello() i am
> invisibly passing the class itself a s a parameter by default?

It's not the class that get passed (unless you use a classmethod, but 
that's not the case here), but the instance. And you are not "invisibly" 
passing it, you just pass it another way. In fact, foo.hello() is 
equivalent to type(foo).hello(foo).

> just seems backwards and weird.

Each and every OOPL needs to have a way to "inject" the instance a 
method was called on into the method's local namespace. Python solved 
this it's own way - by making 'methods' thin wrappers around 
instance/function couples, these wrappers being in charge of calling the 
function with the instance as first argument. From the implementation 
POV, this allow to build methods on existing, more general features - 
functions and the descriptor protocol - instead of having to 
special-case them. From the programmer's POV, this allow to define 
functions outside classes, then dynamically add them as 'methods' either 
on a per-class or per-instance basis.



From gagsl-py2 at yahoo.com.ar  Sat May 24 19:05:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 20:05:12 -0300
Subject: for some reason the actual tries figure is not right
References: <002301c8bdcc$979ce8c0$1300a8c0@Home>
Message-ID: <op.ubok2yurx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 15:32:56 -0300, garywood <woodygar at sky.com> escribi?:

> can someone explain why the tries displays the wrong number
> thanks
> orginally i started off with tries = 0 but it was off by 2

How would you count that if you were playing the game "for real"? I'd say that you start (mentally) at 0 and count one more each time the other player says a word.

In your code, there are *two* places where the player inputs his guess. A common idiom is to rearrange the code this way:

tries = 0
...
while True:
     guess = raw_input("Your guess: ")
     tries += 1
     # break out of the loop when player guesses
     if guess==correct:
         break
     print "Sorry..."
     ....
print "You guessed it in", tries, "tries."
...

(instead of all those if/else, try to use a dictionary to hold the "hint" corresponding to each word - you might even store several hints, as a tuple)

-- 
Gabriel Genellina



From lists at cheimes.de  Wed May  7 16:47:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 22:47:51 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
Message-ID: <48221577.6030408@cheimes.de>

grayaii schrieb:
> There are so many threads on this subject, but I ran across a
> situation on Windows that I can't figure out.
> 
> I'm trying to run this little command-line exe and when I launch like
> this, it hangs:
> 
>>>> import subprocess
>>>> command = r'c:\mydir\foo.exe'
>>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>>> returncode = run.wait()  ## HANGS HERE ##

The code blocks because you aren't reading from stdout and stderr. Use
the communicate() method instead of wait().

Christian


From dmitrey.kroshko at scipy.org  Fri May  9 06:46:51 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:46:51 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com> 
	<Xns9A9976D7CDC64duncanbooth@127.0.0.1>
Message-ID: <e3e88105-2532-42ef-86c1-8bd45b63b488@m36g2000hse.googlegroups.com>

Hmm... I thought this issue is available from Python2.5 only. I have
no other interpreters in my recently installed KUBUNTU 8.04.

Thanks all,
D.

On 9 ???, 13:41, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> dmitrey <dmitrey.kros... at scipy.org> wrote:
> > On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> >> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> >> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> >> > and
> >> > list2 = [0, 2, 4] # integer elements
>
> >> > howto (I mean most simple recipe, of course) form list3 that contains
> >> > elements from list1 with indexes from list2, i.e.
>
> >> list3 = [list1[i] for i in list2]
>
> > Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> > (preferable) 2.3 compatible.
> > Are there other solutions?
> > D.
>
> Did you try Paul's suggestion?
>
> Python 2.3.5 (#1, Oct 13 2005, 09:17:23)
> [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> >>> list2 = [0, 2, 4]
> >>> list3 = [list1[i] for i in list2]
> >>> list3
>
> ['elem0', 'elem2', 'elem4']



From kyrie at uh.cu  Thu May 15 20:05:51 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 15 May 2008 20:05:51 -0400
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <200805152005.52062.kyrie@uh.cu>

On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> Why can't I write this?
> --
> http://mail.python.org/mailman/listinfo/python-list

yield recieved.

Thanks. 

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From janzert at janzert.com  Tue May 13 22:44:53 2008
From: janzert at janzert.com (Janzert)
Date: Tue, 13 May 2008 22:44:53 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1059.1210699996.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>	<68t4o0F2vaoncU1@mid.uni-berlin.de>	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>	<68trmmF2vjivnU1@mid.uni-berlin.de>	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <qosWj.251$R_2.217@newsfe07.lga>

D'Arcy J.M. Cain wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>> Not everybody has grown in English-speaking community, you know. And
>> knowing math quite good, I prefer writing "x = y" instead of "Set x to
>> y".
> 
> OMG!  It's COBOL.
> 
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  If that wasn't true then pseudocode would look a lot more
> like English than it does.  In fact, pseudocode tends to look a lot
> like Python.
> 

I don't always agree with him but I thought Dave Thomas' recent post[1] 
about 'natural language like' programming languages was pretty spot on. 
He is specifically talking about Domain Specific Languages (DSLs) but I 
think it applies to general programming languages just as well.

Janzert

1. http://pragdave.blogs.pragprog.com/pragdave/2008/03/the-language-in.html


From Scott.Daniels at Acm.Org  Mon May  5 20:44:44 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 05 May 2008 17:44:44 -0700
Subject: Nested os.path.join()'s
In-Reply-To: <mailman.587.1209997341.12834.python-list@python.org>
References: <mailman.587.1209997341.12834.python-list@python.org>
Message-ID: <Mr-dnU8iro6XNYLVnZ2dnUVZ_hqdnZ2d@pdx.net>

Paul Scott wrote:
> ... example:
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah
> 
> Question is, is there a better way of doing this? The above *works* but
> it looks kinda hackish...

You've had the joining addressed elsewhere, but note that:
     if os.path.exists(os.path.join(basedir, picdir)):
         blah blah
is a lot better than comparing to True.

--Scott David Daniels
Scott.Daniels at Acm.Org


From vdv100 at gmail.com  Sun May  4 14:20:07 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 19:20:07 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
	<eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
	<18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>
Message-ID: <eba8281a0805041120o4dbed6dbl251c150d316ee099@mail.gmail.com>

2008/5/4 David <wizzardx at gmail.com>:

> > What I want is display a window with a image, the user select a region
> of
> > the image, and the region value is passed to my program, my program
> slice
> > the image region, and analyze it.
> >
>
> If it's your apps own window, then getting a rectangle selected by the
> user is simple.
>
> 1) Make skeleton x/gtk/wx/qt/etc app
> 2) Add code to show an image
> 3) Add code to capture mouse events
> 4) Add code to show the 'rubber band' rectangle over the mouse selection
> area
> 5) When the user releases the mouse, then extract the part of the
> rectangle between where a mouse button was clicked and where it was
> released.
>
> All this would be in the docs for the Python x/gtk/wx/qt/etc libs.
> Where is the difficulty?


Right now I don't have any difficulty :)
I just asked for a library to do that, if exist I don't have to write all
the things from scratch (the selection part), but I am able to do my tasks
easily with Xlib or Pygame.

Thanks for the help.

Cheers,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org


>
> David.
>
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From bockman at virgilio.it  Wed May 21 08:48:25 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Wed, 21 May 2008 05:48:25 -0700 (PDT)
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <8586a78d-5614-4700-97aa-37c867fab695@l42g2000hsc.googlegroups.com>

On 21 Mag, 14:31, srinivas <srinivas.puvv... at gmail.com> wrote:
> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
>
> i have ?python in folder C:\python25\..
> and functions folder D:\programs\Functions\
>
> pls help me friends how to do that.

You have two choices:

1. In this way you can import single modules (files) in tour folder

import sys
sys.path.append(r'D:\programs\Functions\')
import my_module_1
import my_module_2

and then  use whatever you have in the modules:

my_module_1.my_function()
print my_module_1.my_variable


2.
If you add an empty python module called __init__.py inside the folder
D:\programs\Functions\,
then python will handle the folder as a package (i.e. a group of
modules) and  you can import
them in this way:

sys.path.append(r'D:\programs\')
import Functions # I'm not sure this is needed ...
from Functions import my_module_1, my_module_2

And then use whatever is in your modules as in case 1.

If you put any code in __init__.py, this code will be executed when
the import Functions
statement is executed. This can be handy in some cases, e.g. if you
have subfolders of
Function folder and want to extend sys.path to include all them.

For more details, read the section 6 of Python tutorial.

HTH

Ciao
------
FB


From bbxx789_05ss at yahoo.com  Fri May 16 15:25:34 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 16 May 2008 12:25:34 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
Message-ID: <104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>

globalrev wrote:
> i ahve a program that takes certain textsnippets out of one file and
> inserts them into another.
>
> problem is it jsut overwrites the first riow every time.
>
> i want to insert every new piece of text into the next row.
> so:
> 1. how do i write to a new line every time i write to the file?
>
> 2. if i dont want to write to a new line but just want to insert it
> after the last token in the file, how do i do then?

Generally, you can't "insert" anything into a file.  You can either
append to the end of a file, or you can rewrite the whole file.  It
sounds like you probably want to read the file into an array using
readlines().  Then manipulate that array however you want--appending
and inserting--and when you are done, overwrite the file with your
array.

However, you should be aware that as soon as you open a file for
writing all the data is erased, and if your program should happen to
crash right then, the array containing the data will disappear into
the ether and your file will be empty--in other words all your data
will be gone.  To prevent such an occurence, you should write your
final data to another file, then delete the original file, and finally
change the other file's name to the original file name.



From ivan.illarionov at gmail.com  Mon May 26 15:45:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 19:45:19 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
	<g1f2v2$129$01$1@news.t-online.com>
Message-ID: <g1f40f$2avo$1@news.mtu.ru>

On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:

> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
> 
>> If the OP wants PHP-style programming he will get better results with
>> PHP because PHP was designed this way. Any Pythonic solution will be an
>> overkill.
> 
> Better shoot yourself in the foot with a PHP-like Python-thing, than
> committing suicide by shooting yourself into the head with PHP ...

:) I can't imagine anything uglier than Python with its significant 
whitespace wrapped inside HTML. I guess it could be more damaging than 
PHP which was written exactly for this purpose.


From paul at floorball-flamingos.nl  Fri May  2 11:40:02 2008
From: paul at floorball-flamingos.nl (Paul Melis)
Date: Fri, 02 May 2008 17:40:02 +0200
Subject: Getting started with pyvtk
In-Reply-To: <ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
	<ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
Message-ID: <481b35eb$0$24406$5fc3050@news.tiscali.nl>

Peter Pearson wrote:
> On Thu, 01 May 2008 16:45:51 -0500, Robert Kern <robert.kern at gmail.com> wrote:
>> pyvtk is not the Python interface to VTK. It is for the
>> creation of VTK files.  The vtk(1) command is a Tcl shell
>> with the VTK libraries loaded (I believe).  Read the VTK
>> documentation for information on the Tcl interface if you
>> really want to use it. 
> 
> You're right: I don't really want to use it.
> 
>> The Python interface is also included in the VTK sources,
>> although it might not have been built on your machine. You
>> have to enable it when you build VTK itself. The Python
>> interface is essentially the same as the C++
>> interface. There are Python examples in the VTK source
>> tree.
> 
> That's the ticket: I don't want to "import pyvtk", I
> want to "import vtk" and ape /usr/share/vtk/.../*.py.
> 
> Thanks.

I'm not sure you've been helped so far as you seem to already understand 
about pyvtk not being the official VTK bindings :)

So, what would you like to know?

Paul



From grante at visi.com  Mon May 12 10:46:07 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:46:07 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
Message-ID: <lI6dnUFf8M6yxbXVnZ2dnUVZ_gKdnZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Paddy <paddy3118 at googlemail.com> writes:
>
>> I've used Fortran and C and so would tend to use either i,j,k as the
>> unused loop variable above, or, for clarity, call it something
>> descriptive like loop_count, if the loop body would be clearer.
>
> The problem with all of these names is that they also have long
> precedent as names of values that *will* be used inside the loop.

I guess people who standardize on loop_count never nest loops. :)

> Because of the precedent of those names, choosing one of those
> names doesn't make it clear to the reader that the value is
> never used; they have no indication from you of that until
> they look over the code a few times. It's implicit rather than
> explicit.

And when somebody adds a nested loop things fall apart.

-- 
Grant Edwards                   grante             Yow! BARBARA STANWYCK makes
                                  at               me nervous!!
                               visi.com            


From yves at zioup.com  Fri May  9 10:57:11 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 14:57:11 GMT
Subject: Grabbing previous iteration in a dict
In-Reply-To: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<7xabizkdui.fsf@ruckus.brouhaha.com>
	<254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
Message-ID: <bDZUj.126762$Cj7.126335@pd7urf2no>

dannywebster at googlemail.com wrote:
>> You cannot rely on the elements of a dictionary being in any
>> particular order (dicts are internally hash tables), so the above
>> is almost certainly ont what you want.
> 
> 
> Hi - thanks for your reply.  How about if I made the dict into a list
> (of
> which I have done).  How would I then reference the previous item?
> Can they
> be indexed?

Yes, I ran in a situation similar to yours, I read the content of a file, 
and had to both keep the order of the lines in the original file, and create 
a dictionary from the lines. So I created a class that contained both a 
dictionary and a tuple containing the keys of the dictionary in the original 
order. Something like this:

class mydict(object):

   def __init__(self, filename):
     x = [ e.strip().split() for e in file(filename) ]
     self.ordered_lines = tuple([ e[0] for e in x ])
     self.dictionary = dict( zip(self.ordered_lines, [ e[1:] for e in x]) )

a = mydict('/some/file')
a.ordered_lines
a.dictionary



Yves.
http://www.SollerS.ca


From celoserpa at gmail.com  Thu May 15 22:32:38 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 23:32:38 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
	<op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <1e5bcefd0805151932ie56e5dcx999c5181ce799f27@mail.gmail.com>

>
> That depends on what you consider "valid". Just duplicating the function
> code in the test is absurd and pointless.


Yes, the code is duplicated, and now I see your point. Thanks! However, that
code would always generate the same string (despite the timestamp). But that
was a violation of the DRY principle. And the specs don't really care if it
is a md5, only that the string is unique.

New mantra: Test to the interfaces (as in program to the interfaces) :)

However, I'm curious on how you would test the mathprogram.divide(x,y)
function. But in this case I'm not testing the implementation. I don't care
how the divide process is done, only that it is done correctly (10/2 = 5).
Actually my posted example was meant to be like this:

def test_divide
  divdend = 10
  divisor = 2
  expected_result = 5
  #10/2 should be 5, so let's test if the method gets it right:
  self.assertEquals(mathprogram.divide(dividend,divisor), expected_result)

I'd say they are still unit tests


Yes. Now that I think of, they all really only change in **scope**.

It's hard to re-wire your brain and break old habits, so, thanks for
helping!

Marcelo.

On Thu, May 15, 2008 at 11:19 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 15 May 2008 22:44:17 -0300, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> escribi?:
>
>  @Gabriel: I understand what you are saying. It all depends on what you
>> want
>> to test. In this case, I wanted to test the algorithm of the method.  The
>> test_generate_chat_dir_string is meant to do just that: Check if the
>> generate_chat_dir_string generated a "valid" (according to the specs)
>> string
>> for a "chat dir name".
>>
>
> That depends on what you consider "valid". Just duplicating the function
> code in the test is absurd and pointless. Of course it will pass now -
> you're executing the same code! On the other hand, what if you later want to
> replace the algorithm and use SHA1 instead of md5? The test will fail then -
> but do you *actually* care whether it actually returns the md5 digest or
> something else?
> If you *do* care, then you should compute the output by hand (or assume it
> is correct *now*) and hard code THAT string in the test, not recompute it
> again.
> If you *don't* care, then follow the steps I outlined in the previous
> message: just ensure that different inputs give different outputs.
>
>  It is not a integration nor a functional "unit" test, but it is a "real"
>> unit test in the sense that I created a test for each method and I
>> exercised
>> the methods the following way:
>>
>>  1) Got some data to test and...
>>  2) ... Generated an output "manually" in the test method that I knew were
>> the expected return of the tested method;
>>  3) Fed this data to the tested method and compared the manually generated
>> result with the return value of the method.
>>
>> It is like testing a method that does a simple division:
>>
>> def test_divide
>>  divdend = 10
>>  divisor = 2
>>  expected_result = 5
>>  self.assertEquals(mathprogram.divide(dividend,divisor),5)
>>
>
> Mmm, no, your posted example was more like this:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = dividend/divisor
>   self.assertEquals(mathprogram.divide(dividend,divisor), 5)
>
> You *computed* the expected result using (presumably) the same code as the
> tested function.
>
>  The techniques you explained in your message sound more like functional
>> testing or integration + functional testing where multiple aspects of a
>> single functional unit are being exercised. Or am I wrong?
>>
>
> I'd say they are still unit tests. I'm testing a single function, comparing
> the expected output with the actual output. But I only check the *public*
> interfase of the function, what their users expect from it (its contract, if
> you want); I don't check the internal implementation.
> The real value of unit tests comes when you want to modify something, or
> reimplement it. You must ensure that you don't break other things. With a
> too strict test very tied to the current implementation, you can't change
> anything.
>
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From znfmail-pythonlang at yahoo.com  Mon May 19 10:18:00 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Mon, 19 May 2008 10:18:00 -0400
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
Message-ID: <g0s26t$s2c$1@aioe.org>

Thanks, since posting I  figured out how to interpret the histogram results, 
which seems to be the consensus in responses. I wrote a check image program 
and have been periodically calling it against a folder where I make a copy 
of our images used for production. My method right now is to check what we 
send for errors, but is not preventive.

Also I determined whitespace is not the only issue, any color that 
dominates. I'm considering rewriting this code below to setup bins, so if 
combined neighboring colors exceeds the threshold then reject the image. I 
have examples where half the image appears black, but actually varies 
throughout.

Since my image is RGB I'm looping through a 768 element list.

Zach-

import Image, os


def check_image(file):

    try:
        im = Image.open(file)
    except:
        return "Can't open file %s " % file

    imData = im.histogram()
    i = 0
    for ea in imData:
        if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
            return "bad image %s - %s element num is %s " % (file, ea, 
str(i))
        i = i + 1

    return "good image %s, image size is %s" % (file, im.size)


def main(dir):
    data = ""
    try:
        files = os.listdir(dir)
        for ea in files:
            data = data + str(check_image(os.path.join(dir,ea))) + "\n"
    except:
        return "Can't get files in %s" % dir
    return data

print main("\\\\host\\path\\to\\image_folder\\")


"Ken Starks" <straton at lampsacos.demon.co.uk> wrote in message 
news:g0o0h3$jd4$1$8300dec7 at news.demon.co.uk...
> As others have said, PIL has the 'histogram' method to do most of the 
> work. However, as histogram works on each band separately, you have
> a bit of preliminary programming first to combine them.
>
> The ImageChops darker method is one easy-to-understand way (done twice),
> but there are lots of alternatives, I am sure.
>
>
> # ------------------------------------
>
> import Image
> import ImageChops
>
> Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> R,G,B = Im.split()
>
> Result=ImageChops.darker(R,G)
> Result=ImageChops.darker(Result,B)
>
> WhiteArea=Result.histogram()[0]
> TotalArea=Im.size[0] * Im.size[1]
> PercentageWhite = (WhiteArea * 100.0)/TotalArea
>
>
>
>
>
> Poppy wrote:
>> I've put together some code to demonstrate what my goal is though looping 
>> pixel by pixel it's rather slow.
>>
>> import Image
>>
>> def check_whitespace():
>>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
>>
>>     size = im.size
>>
>>     i = 0
>>     whitePixCount = 0
>>     while i in range(size[1]):
>>         j = 0
>>         while j in range(size[0]):
>>             p1 = im.getpixel((j,i))
>>             if p1 == (255, 255, 255):
>>                 whitePixCount = whitePixCount + 1
>>                 if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
>> 1404) / 4) 25%
>>                     return "image no good"
>>             j = j + 1
>>         i = i + 1
>>
>>     print whitePixCount
>>
>>     return "image is good"
>>
>> print check_whitespace()
>>
>>
>> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>> I need to write a program to examine images (JPG) and determine how much 
>>> area is whitespace. We need to throw a returned image out if too much of 
>>> it is whitespace from the dataset we're working with. I've been 
>>> examining the Python Image Library and can not determine if it offers 
>>> the needed functionality. Does anyone have suggestions of other image 
>>> libraries I should be looking at it, or if PIL can do what I need?
>>>
>> 



From castironpi at gmail.com  Fri May 16 11:27:21 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:27:21 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com> 
	<9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com> 
	<f821aecb-68a7-4aab-9cbd-b7fd054364eb@y38g2000hsy.googlegroups.com>
Message-ID: <c8db7584-1b9c-4fa9-a8b8-d8499e6eb6eb@c58g2000hsc.googlegroups.com>

On May 16, 10:21 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 9:41 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
> > > > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > > > ?? wrote:
> > > > > >     I wonder why below does not work.
>
> > > > > > a = object()
> > > > > > a.b = 1        # dynamic bind attribute failed...
>
> > > > > The implementation of slots depends on that behaviour:
>
> > > > >http://docs.python.org/ref/slots.html
>
> > > > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > > > Can you expand on that?
>
> > > > > Peter
>
> > > > Spirals are important.
>
> > > I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Python 3.0a5 (py3k:62932M, May  9 2008
> >  win32
> > Type "help", "copyright", "credits" or>>> import parser
> > >>> import compiler
>
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > ImportError: No module named compiler
>
> > Does anyone want to model mic-based soundwaves?  My recent project has
> > been color progression over time, and talking about compilers.- Hide quoted text -
>
> > - Show quoted text -
>
> Can 'compiler' come back in?  I want to build a compiler + exec.- Hide quoted text -
>
> - Show quoted text -

I am also talking about Mac.  I have this one:

		def click( self, *_ ):
			self.degrees+= 180

Looking entirely unapproachable.  Bartender?


From barisc at bckm.org  Tue May 27 05:03:11 2008
From: barisc at bckm.org (Baris-C)
Date: Tue, 27 May 2008 02:03:11 -0700 (PDT)
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
Message-ID: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>

On May 27, 2:32?am, Marc Pelletier <m... at stopspam.goldak.ca> wrote:
> Hello,
>
> I am just getting started in Python with the intention of tweaking an
> opensource wxPython project called Brewsta. I've been reading python
> documentation and the code, and its starting to make sense, but there seems
> to be an awful lot of boilerplate required to make such an application
> work.
>
> Are there any ides that help out? There seem to be lots of options, and
> I've been downloading like crazy, but nothing so far that stands out. Are
> there any tips or tutorials specific to doing gui development?
>
> cheers
>
> Marc Pelletier

i use eric on kde 3.5.9


From deets at nospam.web.de  Wed May 14 10:19:45 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 16:19:45 +0200
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
Message-ID: <690ap7F2u0ftdU1@mid.uni-berlin.de>

> An instance method works on the instance
> A Static method is basically a function nested within a class object
> A class method is overkill?

If anything, a static method is overkill. See it this way: *if* you for some
reason put a method into an enclosing context - isn't it worth having a
reference to that? 
 
> I can call a static or class method through either the class OR any
> instance of it. I've never designed a method that took advantage of
> the class name except in cases where I needed to extend a super class
> *but* even in this case, I didn't use the enclosing class name...
> 
> Whats the deal with class methods, why use them over anything else?
> What does a class method accomplish in at least one line shorter than
> anything else? Does it help reduce duplication or typing? I am at a
> lost for words that can shed at least *one* good reason to use them.
> 
> What is the one greatest reason to use them? A little syntax and
> explanation can go a long long way. I am failing to understand them so
> any help is really appreciated here!

There is not one greatest reason. They have their uses as e.g.
factory-methods for instances of the class. Or as e.g. registering
functions for notifications amongst instances of the class. In which case
writing

class Foo:

   @classmethod
   def register(cls, listener):
       cls.LISTENERS.append(listener)

is much more robust because you could rename Foo the way you like - register
won't be affected.

Diez






From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:32:00 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:32:00 +0200
Subject: "prove"
In-Reply-To: <mailman.770.1210254618.12834.python-list@python.org>
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <48240c00$0$7184$426a74cc@news.free.fr>

Lucas Prado Melo a ?crit :
> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

Why do you need the documentation ? Just fire up your python shell and 
hack a Q&D example:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> class Foo(object):
...     def bar(self):
...             print "in %s bar" % self
...
 >>> f = Foo()
 >>> Foo.bar(f)
in <__main__.Foo object at 0xb7dccd2c> bar
 >>> f.bar()
in <__main__.Foo object at 0xb7dccd2c> bar
 >>>



From howachen at gmail.com  Sun May 25 14:13:07 2008
From: howachen at gmail.com (howa)
Date: Sun, 25 May 2008 11:13:07 -0700 (PDT)
Subject: Beginner question
Message-ID: <f4fb9b71-847b-4e71-892b-952b2e0f8e6e@w5g2000prd.googlegroups.com>

Hi,

Just want to try mod_python but it is more complicated then I
expected...

I just followed the tutorial on: http://www.modpython.org/live/mod_python-2.7.8/doc-html/inst-testing.html


E.g.

URL = http://www.example.com/mptest.py

It return

ImportError: No module named mptest

1. If I removed addHandler mod_python .py and PythonHandler mptest, I
can see the SOURCE CODE

2. The PythonHandler mod_python.testhandler seems return correct
result, showing I am using python 2.4.3


any idea?

Thanks.


From castironpi at gmail.com  Tue May 13 06:33:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:33:58 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<d2586a08-5933-4523-a1f4-7554cc4aad95@t54g2000hsg.googlegroups.com>
Message-ID: <af6c02a1-fe7c-4f41-8de0-03def12f32f1@m45g2000hsb.googlegroups.com>

On May 13, 4:52?am, castiro... at gmail.com wrote:
> On May 13, 4:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
>
>
> > Dave Parker wrote:
> > > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> > >>Yes, I am trying to visualize something.
>
> > > If it is related to making furniture comfortable for humans, have you
> > > considered painting the furniture with thermochromic paint (
> > >http://en.wikipedia.org/wiki/Thermochromism)??It changes color in
> > > response to temperature, which in part is determined by how hard a
> > > body is pressed against it because close contact tends to trap heat.
> > > An evenly distributed color might indicated evenly distributed
> > > pressure.
>
> > Don't let yourself be irritated by castironpi - he's the virtual equivalent
> > of a mumbling mad man in this group. Ignorance serves best as remedy - and
> > I only see his postings being
> > quoted... a huge relief!)
>
> > Diez
>
> I hate to ignore work. ?Who is the non-virtual equivalent mumble?- Hide quoted text -

However, that's just the sunrise I would be talking about.  How are
the soft drinks here?  Does anyone else have a t.v.?  I don't like
mine or have one.



From zerge69 at gmail.com  Tue May 20 23:52:31 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Tue, 20 May 2008 20:52:31 -0700 (PDT)
Subject: Newbie In Python
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <597c5935-6647-4276-81f0-b30693d93ba2@k10g2000prm.googlegroups.com>

On May 20, 5:15 am, andrew.smith.... at gmail.com wrote:
> I have Heard About "Python" its a OOD Language. i have to Learn it
> where from i should start it.
> i have python compiler at linux Platform.
> anyone can suggest me about it.
>
> Thanks In advance.

I recommend Pyscripter
http://code.google.com/p/pyscripter/

It includes all the Python documentation and tutorial


From amat at kabsi.at  Thu May 22 17:51:26 2008
From: amat at kabsi.at (Andreas Matthias)
Date: Thu, 22 May 2008 23:51:26 +0200
Subject: Overloading __getitem__
Message-ID: <uf6hg5-ca9.ln1@buckbeak.hogwarts>

The following code doesn't run but I hope you get what I
am trying to do.


class my_dict (dict):

    def __getitem__ (self, key, crazy = False):
        if crazy == True:
            return 5 * self.get(key)
        else:
            return self.get(key)


foo = my_dict()
foo['a'] = 123

print foo['a']
print foo['a', crazy = True]


Is it somehow possible to overload __getitem__ with an additional
argument? Are there other possibilities to achiev this? Or is
the only solution to this to write a normal function call
`def my_get (self, key, crazy=False)'?


Ciao
Andreas


From banibrata.dutta at gmail.com  Mon May 12 02:52:59 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 12:22:59 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <3de8e1f70805112352j341a3cd2o34d0964499e86271@mail.gmail.com>

Found that SnakeSQL does implement DB2.0 API. However are there such
implementations for MySQL ?

On 5/12/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
>
> On 5/12/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>>
>> Banibrata Dutta ?rta:
>>
>>> Hi,
>>>  Again a noob question.
>>>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is
>>> it correct to conclude that there is no RDBMS agnostic, single/uniform DB
>>> access API for Python ?
>>> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>>>  How is the RDBMS change handled for solutions which need to work with
>>> different RDBMSs ??
>>>
>> http://www.python.org/dev/peps/pep-0249/
>>
>
>
> That appears to be only an API specification. Are there any implementations
> of that ?
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From wgumgfy at gmail.com  Fri May  9 01:38:44 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 22:38:44 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org>
Message-ID: <68i6b5F2soauaU1@mid.individual.net>

Sherman Pendley wrote:
> kodifik at eurogaran.com writes:
> >
> > > PLEASE DO NOT | :.:\:\:/:/:.:
> > > FEED THE TROLLS | :=.' - - '.=:
> >
> > I don't think Xah is trolling here (contrary to his/her habit)
> > but posing an interesting matter of discussion.
>
> It might be interesting in the abstract, but any such discussion, when
> cross-posted to multiple language groups on usenet, will inevitably
> devolve into a flamewar as proponents of the various languages argue
> about which language better expresses the ideas being talked about.
> It's like a law of usenet or something.
>
> If Xah wanted an interesting discussion, he could have posted this to
> one language-neutral group such as comp.programming. He doesn't want
> that - he wants the multi-group flamefest.

Not everyone follows language-neutral groups (such as comp,programming 
as you pointed out), so you actually reach more people by cross posting. 
This is what I don't understand - everyone seems to assume that by cross 
posting, one intends on start a "flamefest", when in fact most such 
"flamefests" are started by those who cannot bring themselves to 
skipping over the topic that they so dislike.

-- 
wg 




From dReEeMpOeVsEtT1H at IgSmail.com  Thu May 29 09:53:51 2008
From: dReEeMpOeVsEtT1H at IgSmail.com (deepest1)
Date: Thu, 29 May 2008 15:53:51 +0200
Subject: boost
Message-ID: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>

Hi everybody.

I'm trying to use boost, but just don't know how to set it up.

My os is winXP (installed on disk D).
Python is installed in D:\Python25
MigGW compiler is installed in D:\MinGW (i downloaded it because djgpp 
is making much more errors with bjam)

I have downloaded boost_1_35_0.zip and boost-jam-3.1.16-1-ntx86.zip,
extracted boost_1_35_0.zip to D:\Program Files (so I have now D:\Program 
Files\boost_1_35_0), extracted there bjam and used bjam in cmd:

bjam --build-dir="D:\Program Files\boost_1_35_0" --toolset=gcc stage

I got 12 failures and 8 warnings from this (other few hundrds were ok)


I'm now trying to compile World.cpp and use it from python


World.cpp:
--------------------------
#include "boost/python.hpp"
using namespace boost::python;

BOOST_PYTHON_MODULE(hello)
{
    class_<World>("World")
        .def("greet", &World::greet)
        .def("set", &World::set)
    ;
}


struct World
{
    void set(std::string msg) { this->msg = msg; }
    std::string greet() { return msg; }
    std::string msg;
};
--------------------------



When trying to compile it I get:
----------------------------
E:\Source>g++ World.cpp
World.cpp:1:28: boost/python.hpp: No such file or directory
World.cpp:2: error: `boost' has not been declared
World.cpp:2: error: `python' is not a namespace-name
World.cpp:2: error: expected namespace-name before ';' token
World.cpp:4: error: expected constructor, destructor, or type conversion 
before
'(' token
World.cpp:15: error: `std::string' has not been declared
World.cpp:15: error: ISO C++ forbids declaration of `msg' with no type
World.cpp:16: error: using-declaration for non-member at class scope
World.cpp:16: error: expected `;' before "greet"
World.cpp:17: error: expected `;' before "std"
World.cpp:17: error: using-declaration for non-member at class scope
World.cpp:17: error: expected `;' before "msg"
World.cpp: In member function `void World::set(int)':
World.cpp:15: error: 'struct World' has no member named 'msg'
----------------------------


What have i done wrong and what should have been done instead?

Thank you in advance. :)


From kccnospam at glenevin.com  Mon May 19 14:56:52 2008
From: kccnospam at glenevin.com (seanacais)
Date: Mon, 19 May 2008 11:56:52 -0700 (PDT)
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
Message-ID: <12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>

On May 19, 2:11 pm, Peter Otten <__pete... at web.de> wrote:
>
> There's some magic going on behind the scene which means that you have to
> create a Tkinter.Tk instance before you can start churning out StringVars:
>
> >>> import Tkinter as tk
> >>> v = tk.StringVar()
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 257, in __init__
>     Variable.__init__(self, master, value, name)
>   File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 188, in __init__
>     self._tk = master.tk
> AttributeError: 'NoneType' object has no attribute 'tk'>>> root = tk.Tk()
> >>> v = tk.StringVar()
> >>> v.set(42)
> >>> v.get()
>
> '42'
>
> Peter


I had the Tkinter import as

from Tkinter import * but I changed it to

import Tkinter as tk

and modified the creation of the root object to

root=tk.Tk()

I then had to change every instance of Menu, Label,
Button, and all Tkinter elements to be prefaced by
tk.  (so Button became tk.Button).  That kind of makes
sense to me.

However even after specifying StringVar is a tk type

	def initOPValues(self, OPname, dname):

		OPDefaults = {
			'Vval'  : 0,
			'Ival'  : 0,
			'Otemp' : 0
		}

		dname = dict((d,tk.StringVar()) for d in OPDefaults)
		for d in OPDefaults:
				dname[d].set(OPDefaults[d])


I still get a very similar error message

C:\Code\gui>tkinter.py
Traceback (most recent call last):
  File "C:\Code\gui\tkinter.py", line 169, in <module>
    ps.initOPValues(c, OPValues[c])
  File "C:\Code\gui\tkinter.py", line 54, in initOPValues
    dname = dict((d,tk.StringVar()) for d in OPDefaults)
  File "C:\Code\gui\tkinter.py", line 54, in <genexpr>
    dname = dict((d,tk.StringVar()) for d in OPDefaults)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
    Variable.__init__(self, master, value, name)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
Exception exceptions.AttributeError: "StringVar instance has no
attribute '_tk'"
 in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
0x00B7E418>> ignored


Thanks!

Kevin


From hdante at gmail.com  Thu May 22 00:36:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:36:15 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com>
Message-ID: <d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>

On May 22, 1:26?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
> >>> a = 1e16-2.
> > >>> a
> > 9999999999999998.0
> > >>> a+0.999 ? ? # gives expected result
> > 9999999999999998.0
> > >>> a+0.9999 ? # doesn't round correctly.
>
> > 10000000000000000.0
>
> ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> ?1e16-2 == 0x1.1c37937e07fffp+53
> ?1e16 == 0x1.1c37937e08p+53
>
> ?(that is, the hex representation ends with "7fff", then goes to
> "8000").
>
> ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> This is not a bug, it's a feature.

 I didn't answer your question. :-/

 Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
by default. So that's strange.

 The following code compiled with gcc 4.2 (without optimization) gives
the same result:

#include <stdio.h>

int main (void)
{
	double a;

	while(1) {
		scanf("%lg", &a);
		printf("%a\n", a);
		printf("%a\n", a + 0.999);
		printf("%a\n", a + 0.9999);
	}
}


From fred.sells at adventistcare.org  Tue May 20 09:46:16 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Tue, 20 May 2008 09:46:16 -0400
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <g0uec3$cai$1@news.al.sw.ericsson.se>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B090C@acesxch01.ADVENTISTCORP.NET>

or
for i in range(1,100):
  print ('fizz','','')[i%3] + ('buzz','','','','')[i%5] or i

> > 
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
> > 
> > for i in range(1,101):
> >     if i%3 == 0 and i%5 != 0:
> >         print "Fizz"
> >     elif i%5 == 0 and i%3 != 0:
> >         print "Buzz"
> >     elif i%5 == 0 and i%3 == 0:
> >         print "FizzBuzz"
> >     else:
> >         print i
> > 
> > 
> > is there a better way than my solution? is mine ok?
> 
> 


From mccredie at gmail.com  Thu May 29 17:54:50 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 29 May 2008 14:54:50 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <2837626a-0f01-456e-9d8f-cc98097d963e@d45g2000hsc.googlegroups.com>

On May 29, 2:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.
>
> Thanks,
> Nikhil

I a little confused by what you are trying to do, but:

Strings are iterable.

>>> for c in "hello":
...   print "look, a letter", c
...
look, a letter h
look, a letter e
look, a letter l
look, a letter l
look, a letter o

And indexable:

>>> "hello"[0]
'h'

And converting to a list is done like this:

>>> list("hello")
['h', 'e', 'l', 'l', 'o']

They also have some pretty nifty methods:

>>> "hello\r\nworld\r\nlets\r\nsplit\r\n".split("\r\n")
['hello', 'world', 'lets', 'split', '']

>>> "hello world".index('world')
6

>>> "hello world".index('l')
2
>>> "hello world".index('l', 2+1)
3
>>> "hello world".index('l', 3+1)
9
>>> "hello world".index('l', 9+1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: substring not found

Hopefully some of that helps.

Matt


From daveparker at flamingthunder.com  Wed May 28 11:09:42 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 08:09:42 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
Message-ID: <3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>

> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>
> So what does this do exactly if the set throws an error?

I think the catch should catch the error thrown by set, compare it to
0.1, the comparison will not return true because the error is not less
than 0.1, and so the go-to to tinyanswer will not be taken.

> Is the error
> message printed at the top level going to be telling you about the failed
> addition or the failed comparison?

I don't think there will be an error message at the top in the case
above, because I don't think the comparison should fail -- the
comparision will return that it is not true that the error is less
than 0.1.

> Why do you need the catch anyway, if a
> statement is just an expression why can't you just put the statement into
> parentheses?

Statements return values, but statements are not just expressions.
Statements are more about control-flow and side-effects; expressions
are more about returning values.  Putting a statement into parentheses
in a context where expressions are also allowed in parentheses is (or
can be) both lexically and visually ambiguous.  That's why C had to
resort to the confusing "=" vs "==" notation -- to disambiguate the
two cases.  The "catch" keyword unambiguously alerts the reader that
the parenthesis contain a statement (or a whole list of statements).

> For that matter, is there any way to distinguish between different errors
> and only catch particular ones?

I think the catch function should catch all of the errors (and the non-
error result if no error occured), so I think distinguishing the error
would have to come after.  Maybe something like:

Set result to catch(read x from "input.txt".).
If result = dividebyzeroerror then ... else throw result.

I'm open to alternate suggestions, though.

> You have a great opportunity to avoid making some of the same mistakes that
> Python is trying to get out of.

I'm sure that I'll make my own new and different errors. :)  However,
I really appreciate your comments because maybe I'll make fewer
errors.  Or at least, correct them faster.

On May 28, 7:52?am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > Catch also gives you a
> > single, uniform, syntactically unambiguous way to embed statements (or
> > whole statement lists) into expressions -- without causing the
> > syntactic problems of = statements in if statements or the obfuscation
> > of question mark notation, etc. ?For example:
>
> > If catch(set x to y+z.) < 0.1 then go to tinyanswer.
>
> So what does this do exactly if the set throws an error? Is the error
> message printed at the top level going to be telling you about the failed
> addition or the failed comparison? Why do you need the catch anyway, if a
> statement is just an expression why can't you just put the statement into
> parentheses?
>
> For that matter, is there any way to distinguish between different errors
> and only catch particular ones? A bare except clause in Python is usually a
> signal of bad code: when handling errors you only want the errors you have
> anticipated, and want to be sure that any unexpected errors don't get
> caught.
>
> You have a great opportunity to avoid making some of the same mistakes that
> Python is trying to get out of. For example as of Python 2.5
> KeyboardInterrupt and SystemExit to longer inherit from Exception. That
> means a bare except in Python no longer catches either of those: if you
> want to handle either of these exceptions you have to be explicit about it.
>
> --
> Duncan Boothhttp://kupuguy.blogspot.com



From patrickstinson.lists at gmail.com  Thu May 22 20:09:17 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Thu, 22 May 2008 16:09:17 -0800
Subject: statically linking release build on mac
In-Reply-To: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>
References: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>
Message-ID: <6214d7a20805221709o330b2505mceac97d7267dab73@mail.gmail.com>

Here is the error:
code 4, error number 0 (Symbol not found: _Py_DebugFlag
  Referenced from: /Library/Application
Support/Digidesign/Plug-Ins/Play.dpm/Contents/MacOS/Play
  Expected in:
/System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
)

On Thu, May 22, 2008 at 10:13 AM, Patrick Stinson <
patrickstinson.lists at gmail.com> wrote:

> I get an error reporting an unfound symbol using a statically linked
> release build of python2.5 on a OSX-Tiger. This works fine on leopard, where
> the system default python is version 2.5.1 - the same version that I'm using
> to link to.
>
> Sorry, I'm currently screwing with my configs and don't have a build to run
> (my bad :) anymore, but the error is basically this:
>
> Undefined symbol: _PY_DebugFlag
> Referenced From: <my exe>
> Expected in: <core audio framework lib image location>
>
> I moved the system python frameworks out of the frameworks path for the
> build and run just to make sure that they weren't somehow getting in the
> way. I found that that symbol is defined in pydebug.h for both release and
> debug builds. Also, I discovered that I can fix the problem with some of my
> targets (I have both standalone exe and plugin lib versions of my app code)
> by referencing the variable directly like this: int mine = Py_DebugFlag,
> which fixes that symbol but then the next symbol in pydebug (PY_VerboseFlag)
> is reported as undefined. After some playing with it, I found that the
> following code will fix the problem in a basic standalone app:
>
>     int _________mine;
>     void *__________p = NULL;
>     _________mine = Py_DebugFlag;
>     _________mine = Py_VerboseFlag;
>     _________mine = Py_InteractiveFlag;
>     _________mine = Py_OptimizeFlag;
>     _________mine = Py_NoSiteFlag;
>     _________mine = Py_UseClassExceptionsFlag;
>     _________mine = Py_FrozenFlag;
>     _________mine = Py_TabcheckFlag;
>     _________mine = Py_UnicodeFlag;
>     _________mine = Py_IgnoreEnvironmentFlag;
>     _________mine = Py_DivisionWarningFlag;
>     _________mine = _Py_QnewFlag;
>     __________p = (void *) _PyOS_ReadlineTState;
>     __________p = (void *) PyOS_ReadlineFunctionPointer;
>
>
> Woah, don't I feel like the lib is jerking me around a little? Anyway, this
> works if I put it in main() for a standalone target, in a semi-random class
> constructor for the AudioUnit target, and I still can't find the right place
> to put it for the RTAS (
> http://www.digidesign.com/index.cfm?query=developers%20plugin_info%20rtas.cfm&langid=1)
> target. It's a little weird that I'm getting this at runtime and not at
> link-time since I'm linking statically.
>
> This is the standalone main() that works, but fails if I remove the above
> code:
>
> #include <Python.h>
>
> int main(int, char **)
> {
>   int mine = -1;
>   void *p = NULL;
>
>   mine = Py_DebugFlag;
>   mine = Py_VerboseFlag;
>   mine = Py_InteractiveFlag;
>   mine = Py_OptimizeFlag;
>   mine = Py_NoSiteFlag;
>   mine = Py_UseClassExceptionsFlag;
>   mine = Py_FrozenFlag;
>   mine = Py_TabcheckFlag;
>   mine = Py_UnicodeFlag;
>   mine = Py_IgnoreEnvironmentFlag;
>   mine = Py_DivisionWarningFlag;
>   mine = _Py_QnewFlag;
>   p = (void *) _PyOS_ReadlineTState;
>   p = (void *) PyOS_ReadlineFunctionPointer;
>
>   Py_Initialize();
>
>   Py_Finalize();
> }
>
>
> It seems to me like this might have something to do with setting up a
> symbol lookup table correctly or something, I don't know. I'm not having any
> problems with debug builds. This is the relevant part of my config.status.
>
> ac_cs_version="\
>
> python config.status
> 2.5
>
> configured by ./configure, generated by GNU Autoconf
> 2.59,
>
>   with options \"'--enable-universalsdk' '--disable-shared'\"
>
>
> Help? *whimper*.. Cheers.
>
>
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From upton at virginia.edu  Mon May 19 14:31:43 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 19 May 2008 14:31:43 -0400
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <5504f9ac0805191131x2d17e11dn36a97d33582caa78@mail.gmail.com>

On Sun, May 18, 2008 at 6:20 PM, John Salerno <johnjsal at nospamgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I write a lot of job control and process monitoring scripts in Linux.
Stuff that forks and execs processes, and then monitors procfs and
sysfs to collect periodic data.  I actually wouldn't mind doing a GUI
for it, but pretty much all of the data display I need from it I can
do by taking the data files and running them through gnuplot.  (That,
and I'm too lazy to figure out how to rewrite my telemetry plotter
from Java to Python.)

I guess I also write some data conversion programs, mostly the sort of
thing where I have a bunch of data that I didn't think far enough in
advance how I needed to be able to display it, so I just write
something to convert it to where I need it.  Incidentally, I used to
do that all in Java too, until other people in my research group
started making fun of me for it and also for not really knowing a
scripting language.


From inhahe at gmail.com  Thu May 22 14:01:04 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 14:01:04 -0400
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
	<b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>
Message-ID: <%viZj.78717$%15.59308@bignews7.bellsouth.net>

Might have a stack overflow issue, if it retries too many times?

"alex23" <wuwei23 at gmail.com> wrote in message 
news:b3680690-73c3-47cb-8693-54a207daafcd at x1g2000prh.googlegroups.com...
> On May 22, 6:15 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>> Because when you expect exception to occur on something like 0.01% of
>> cases, and you have 4 or 5 exceptions and the code to test for each
>> conditions that cause exceptions is quite long and burried deep inside
>> some other code it's much better to do it this way ;). Too bad there's no
>> syntactic sugar for doing this kind of try-except loop.
>
> I'm surprised your unit tests let it get to such a state... ;)
>
> How about something like this?
>
>    retry, total_fail = False, False
>    try:
>        some_function()
>    except SomeException:
>        some_function2()
>        some_function3()
>        retry = True
>    finally:
>        if retry:
>            try:
>                some_function()
>            except SomeException:
>                total_fail = True
>
> Using 'finally' seems more explicit about it being part of the
> exception handling than using a loop construct.
>
> Actually, this is even more direct:
>
>    try:
>        some_function()
>    except SomeException:
>        some_function2()
>        some_function3()
>        try:
>            some_function()
>        except SomeException:
>            raise SomeError 




From 1jamgold at gmail.com  Mon May 26 15:13:33 2008
From: 1jamgold at gmail.com (JAMGold)
Date: Mon, 26 May 2008 12:13:33 -0700 (PDT)
Subject: COMPUTER GEEKS AND $UCCE$$
Message-ID: <95eb87bd-b9b3-4e81-b8ed-d8e6f593f7ae@p25g2000pri.googlegroups.com>

Let's face it: We love computers, we love to be creative, we love to
show off our talents to as many
people as will watch, and we love to make money doing it.

So why don't more of us excel at the money-making? I know you have
looked at the sales page of an
internet marketing site and just shaken your head and said to
yourself, "I can do better than that!"

Perhaps you've come across a couple of good ones - real cornea poppers
- that make you wonder "How'd
they DO that? Do I have the software and know-how to make stuff like
that?"  You didn't care what they
were selling; you just drooled at the creative possibilities!

So, again, why don't more of us excel at money-making? What if I could
show you a way to do what you
love doing - creating websites, writing innovative code, developing
databases, et al - and make more
money than your boss?  Maybe more than your CEO? (Microsoft employees,
ignore that last! Bill's gonna
make more than you... sorry.)

What I want to do is revolutionize your perception of a much-maligned
and hated profession - internet
marketing! It's the perfect hand-in-glove fit for us computer geeks!
We get to play with automation,
with graphics, with programming and web design... All the elements
that combine to draw us into the
computer world are integral parts of a profession that could make you
thousands and thousands of
dollars a WEEK!

The hard part is getting started. Don't be fooled into thinking that
I'm offering you a get-rich-quick
scheme. It's a profession. I'm suggesting you invest the time and
effort it WILL take to learn a new
angle on what you already know how to do. But still, I'm offering you
a program that will transform
your life - it's THE ideal way to develop and showcase your skills and
abilities!

The training is live and interactive on the web. The owners and top
executives of this company are "in
the trenches" with you and are available to help you via live chat
rooms, personal phone calls (that's
right - you can call the CEO and talk to him on his personal phone!
You MS guys, can you do that?)
You'll be led by the hand step by step to a kind of financial freedom
your current J.O.B. (Just Over
Broke) will NEVER provide for you.

I want you to take a look at two sites:
http://shmyl.com/staqson
http://shmyl.com/nebqson

As you look at these sites and watch the videos, think about the edge
you have on everyone else that's
looking into this business. You already know a lot of the principles
that make internet marketers
successful! You just need to learn how to apply them, and WE WILL SHOW
YOU HOW!
Seriously, you'll be glad you looked into this.

Best regards and I'll see you at the top!

Wayne Hamrick
800 708-0069
Wayne at solutionsRus.ws


From timr at probo.com  Wed May 28 03:36:40 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 07:36:40 GMT
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
	<d371eade-7683-4007-8015-b752de2af6dd@34g2000hsh.googlegroups.com>
Message-ID: <tq2q345p0tfm2dlvrmcg7vur3s0vt7v42o@4ax.com>

eliben <eliben at gmail.com> wrote:
>
>I ended up using an ugly hack to make it work for me. Since
>handle_request() only blocks until a request is received, the thread
>can be unblocked by sending it a real message. So to stop a server, I
>opened a XML-RPC client connection (using ServerProxy from xmlrpclib)
>and made a request. In the server thread, handle_process() returned
>and the thread could see the flag requesting it to stop.
>
>There must be a better way ! Any ideas ?

Well, maybe it is a matter of personal preference, but I don't see anything
wrong with this approach.  If a thread is blocked waiting for a command,
what's wrong with sending it a "please commit suicide" command?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From Joshuajruss at gmail.com  Fri May 30 09:11:31 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Fri, 30 May 2008 06:11:31 -0700 (PDT)
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <0b040810-4764-4cb8-8a74-6e9b40829dc7@34g2000hsh.googlegroups.com>

On May 30, 8:24?am, Josep <papa... at gmail.com> wrote:
> I'm playing with an application framework (or kinda) that's developed
> with python, and it throws this error:
>
> > File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
> > ? ? sql = unicode(sql, self.Encoding)
> > LookupError: unknown encoding: utf_8_euro
>
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue. As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.
I've had nothing but problems ever since I upgraded to Hardy. I used
to be a die hard Ubuntu fan until recently. Maybe try a better OS

>
> My Python version is 2.5.2, Ubuntu Hardy .deb package.
>
> Thanks in advance for your help.
>
> --
>
> Josep S?nchez
> [papapep]
> ----------------------------------http://extralinux.net
> ----------------------------------
>
> ?signature.asc
> 1KDownload



From jonbutler88 at googlemail.com  Thu May 22 04:22:35 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Thu, 22 May 2008 01:22:35 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com>
Message-ID: <c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com>

On May 22, 2:40?am, alex23 <wuwe... at gmail.com> wrote:
> On May 22, 8:18 am, jonbutle... at googlemail.com wrote:
>
> > Sorry, im new to both python and newsgroups, this is all pretty
> > confusing. So I need a line in my __init__ function of my class? The
> > spider class I made inherits from HTMLParser. Its just using the
> > feed() function that produces errors though, the rest seems to work
> > fine.
>
> Let me repeat: it would make this a lot easier if you would paste
> actual code.
>
> As you say, your Spider class inherits from HTMLParser, so you need to
> make sure that you set it up correctly so that the HTMLParser
> functionality you've inherited will work correctly (or work as you
> want it to work). If you've added your own __init__ to Spider, then
> the __init__ on HTMLParser is no longer called unless you *explicitly*
> call it yourself.
>
> Unfortunately, my earlier advice wasn't totally correct... HTMLParser
> is an old-style object, whereas super() only works for new-style
> objects, I believe. (If you don't know about old- v new-style objects,
> seehttp://docs.python.org/ref/node33.html). So there are a couple of
> approaches that should work for you:
>
> ? ? class SpiderBroken(HTMLParser):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? pass # don't do any ancestral setup
>
> ? ? class SpiderOldStyle(HTMLParser):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? HTMLParser.__init__(self)
>
> ? ? class SpiderNewStyle(HTMLParser, object):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? super(SpiderNewStyle, self).__init__()
>
> Python 2.5.1 (r251:54863, May ?1 2007, 17:47:05) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.>>> html = open('temp.html','r').read()
> >>> from spider import *
> >>> sb = SpiderBroken()
> >>> sb.feed(html)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "C:\Python25\lib\HTMLParser.py", line 107, in feed
> ? ? self.rawdata = self.rawdata + data
> AttributeError: SpiderBroken instance has no attribute 'rawdata'
>
> >>> so = SpiderOldStyle()
> >>> so.feed(html)
> >>> sn = SpiderNewStyle()
> >>> sn.feed(html)
>
> The old-style version is probably easiest, so putting this line in
> your __init__ should fix your issue:
>
> ? ? HTMLParser.__init__(self)
>
> If this still isn't clear, please let me know.
>
> - alex23

OK, heres what I have so far:

#!/usr/bin/env python
from HTMLParser import HTMLParser
from urllib2 import urlopen, HTTPError

class Spider(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)
        self.found = []
        self.queue = []

    def handle_starttag(self, tag, attrs):
        try:
            if tag == 'a':
                if attrs[0][0] == 'href':
                    self.queue.append(attrs[0][1])
        except HTMLParseError:
            print 'Error parsing HTML tags'

    def parse(self, page):
        try:
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

    def crawl(self, site):
        self.queue.append(site)
        while 1:
            try:
                url = self.queue.pop(0)
                self.parse(url)
            except IndexError:
                break
            self.found.append(url)
        return self.found

if __name__ == '__main__':
    s = Spider()
    site = raw_input("What site would you like to scan? http://")
    s.crawl(site)

Still getting very odd errors though, this being the latest:

Traceback (most recent call last):
  File "spider.py", line 38, in <module>
    s.crawl(site)
  File "spider.py", line 30, in crawl
    self.parse(url)
  File "spider.py", line 21, in parse
    self.feed(urlopen('http://' + page).read())
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 124, in urlopen
    return _opener.open(url, data)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 381, in open
    response = self._open(req, data)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 399, in _open
    '_open', req)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 360, in _call_chain
    result = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 1107, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/urllib2.py", line 1064, in do_open
    h = http_class(host) # will parse host:port
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/httplib.py", line 639, in __init__
    self._set_hostport(host, port)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/httplib.py", line 651, in _set_hostport
    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
httplib.InvalidURL: nonnumeric port: ''

Also could you explain why I needed to add that
HTMLParser.__init__(self) line? Does it matter that I have overwritten
the __init__ function of spider?

Thanks


From deets at nospam.web.de  Thu May  8 08:16:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 14:16:03 +0200
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <68g992F2sjmdqU1@mid.uni-berlin.de>

M?ta-MCI (MVP) wrote:

> Hi!
> 
>> I don't often feel like using this word
> 
> Look at languages like OCAML or F #

The point being? Yes, shockingly enough other languages have other syntax &
semantics.

Diez


From python at bdurham.com  Sat May  3 18:27:10 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sat, 03 May 2008 18:27:10 -0400
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <481c9223$0$34540$742ec2ed@news.sonic.net>
References: <mailman.465.1209746433.12834.python-list@python.org>
	<481c9223$0$34540$742ec2ed@news.sonic.net>
Message-ID: <1209853630.17819.1251260483@webmail.messagingengine.com>

Matimus and John,

Thank you both for your feedback.

Matimus: I agree with your analysis. I blame lack of caffeine for my
original post :)

Regards,
Malcolm


From notnorwegian at yahoo.se  Thu May 22 19:10:21 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 16:10:21 -0700 (PDT)
Subject: serach file for regexp, return if found?
Message-ID: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>

i want to search a document for a particular regexp and then store
that regexp to a file.

but search and match only returns matchobjects(what are those anyway?
i dont get what to do with them, do they contain true/false,
stringposition etc?)

how do i do:
for rows in file:
    print regexp.find  ## or something equiavlent


From bignose+hates-spam at benfinney.id.au  Thu May  1 21:31:15 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 11:31:15 +1000
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and
	'NoneType'
References: <mailman.440.1209688547.12834.python-list@python.org>
Message-ID: <87fxt11ogs.fsf@benfinney.id.au>

"Jordan Harry" <jharry at EmeryWeiner.org> writes:

> I'm trying to write a simple program to calculate permutations. I
> created a file called "mod.py" and put the following in it:
>  
> def factorial(n):
>     a = n
>     b = n
>     while a>0 and b>1:
>         n = (n)*(b-1)
>         b = b-1

A function that does some calculations internally, but has no 'return'
statement and thus implicitly returns 'None'.

> def perm(n, r):
>     a = factorial(n)
>     b = factorial(n-r)

These statements bind the 'None' returned by the 'factorial' function
to the names 'a' and 'b'.

>     q = a / b

This attempts to use the '/' operator on 'None' with 'None', which
raises the exception you saw.

(good sigmonster, have a cookie)

-- 
 \         "Pinky, are you pondering what I'm pondering?" "I think so, |
  `\    Brain, but Zero Mostel times anything will still give you Zero |
_o__)                               Mostel."  -- _Pinky and The Brain_ |
Ben Finney


From hniksic at xemacs.org  Fri May  2 04:24:48 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 02 May 2008 10:24:48 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com> <7xbq3pjhav.fsf@ruckus.brouhaha.com>
Message-ID: <87bq3pglkf.fsf@mulj.homelinux.net>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> AlFire <spamgrinder.trylater at ggmail.com> writes:
>> But I still can not believe that +=1 is not a thread safe operation.
>
> In CPython I believe it is thread safe, because of the global
> interpreter lock.  Thread switches can happen only between bytecode
> executions, not in the middle of a bytecode, even though executing a
> bytecode can take several machine instructions.

It's safe when writing extensions in C (because of the GIL), but not
when writing Python code.  Python switches threads after a number of
bytecode instructions, so Python code behaves somewhat like C
multithreaded code on a single CPU -- although there is no true
parallelism, you still have context switches at arbitrary places to
worry about, and still need locks because of them.  Since the +=
operator is not compiled into a single bytecode instruction, it needs
the lock.  x+=1 gets compiled into the following bytecode:

  3           0 LOAD_GLOBAL              0 (x)
              3 LOAD_CONST               1 (1)
              6 INPLACE_ADD
              7 STORE_GLOBAL             0 (x)

If two threads execute that code simultaneously, a thread switch could
easily occur some time between LOAD_GLOBAL and STORE_GLOBAL, causing
the variable to be incremented by 1 instead of by 2.


From skanemupp at yahoo.se  Wed May  7 17:47:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:47:36 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <81addfb5-254f-4a2b-a2bc-044592cee07f@p25g2000hsf.googlegroups.com>

and what si the diffrence here:

g = lambda x=5:x*x
g = lambda x:x*x

the first was a mistake to write but it worked
and the x=5 seems to be completely ignored. why? it has no effect at
all?


From stevegill7 at gmail.com  Sun May  4 00:33:45 2008
From: stevegill7 at gmail.com (Jetus)
Date: Sat, 3 May 2008 21:33:45 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
Message-ID: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>

Is there a good place to look to see where I can find some code that
will help me to save webpage's links to the local drive, after I have
used urllib2 to retrieve the page?
Many times I have to view these pages when I do not have access to the
internet.


From istvan.albert at gmail.com  Thu May  1 08:46:51 2008
From: istvan.albert at gmail.com (Istvan Albert)
Date: Thu, 1 May 2008 05:46:51 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>

On Apr 29, 3:51 am, "Zed A. Shaw" <zeds... at zedshaw.com> wrote:

> You can grab the most recent draft of the book at:
>
>  http://zedshaw.com/projects/vellum/manual-final.pdf

> However, I'm curious to get other people's thoughts.

IMO if you would refrain from using swear words in the manual it would
help broadening its reach and acceptance.

i.


From martin at v.loewis.de  Sat May 10 06:21:02 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 12:21:02 +0200
Subject: Pythonicity of some algorithms
In-Reply-To: <mailman.898.1210413757.12834.python-list@python.org>
References: <mailman.898.1210413757.12834.python-list@python.org>
Message-ID: <4825770e$0$25961$9b622d9e@news.freenet.de>

> This works for me. But I'd like to know if this is considered
> Pythonic, and if there are other, better ways of doing the above in
> Python.

>From the Python point of view, it's fine. However, it uses busy-wait,
which I consider bad style (in any language).

> 3) Make a custom thread-safe queue class, with an 'interrupt_get'
> method. When your app calls queue.interrupt_get(), all threads
> currently locking on a queue.get() will continue, but with a
> GetInterrupted exception thrown.

That's what I would do. I'd use the existing Queue class as a base
class, though, rather than starting from scratch.

Regards,
Martin


From johnjsal at NOSPAMgmail.com  Tue May 27 14:08:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 27 May 2008 14:08:14 -0400
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>
Message-ID: <483c4f26$0$7278$c3e8da3@news.astraweb.com>


"Paul McGuire" <ptmcg at austin.rr.com> wrote in message 
news:74d9c37f-807c-4aae-8ad5-db79bb3e2bd2 at 8g2000hse.googlegroups.com...
On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:

My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
about for "python hungarian notation" led me through some like-minded
sites.  But I also found this entry on Joel Spolky's site (http://
www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
warns against tarring all Hungarian-type notations with the same
brush.

Wow, that was fascinating. I had no idea Hungarian notation originally 
didn't mean to prefix the object type! 




From eckhardt at satorlaser.com  Tue May 20 04:54:08 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Tue, 20 May 2008 10:54:08 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
Message-ID: <g6gag5-u3e.ln1@satorlaser.homedns.org>

Asun Friere wrote:
> Well you have to be careful in case some smartarse comes back with a
> class with something like this in it:
> 
> def __eq__ (self, other) :
>     if self is other : return False

That's pretty paranoid. :)
Who said that? (:

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From afilash+python at gmail.com  Fri May 30 12:50:15 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Fri, 30 May 2008 22:20:15 +0530
Subject: how can i stop script from running on login ?
In-Reply-To: <ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>
References: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
	<ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>
Message-ID: <9f9d35df0805300950o5fc9767id9ba6400ac5f6a08@mail.gmail.com>

thanks Benjamin, i have to try it out

On Fri, May 30, 2008 at 6:31 PM, Benjamin Kaplan <benjamin.kaplan at case.edu>
wrote:

>
>
> On Fri, May 30, 2008 at 8:44 AM, abhilash pp <afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
> wrote:
>
>> Hi all,
>>
>> One of my friends played some tricky thing, and now I am in great trouble,
>> please help
>> Here is the scenario  [windows xp ]:
>>
>> He wrote one login script and put it on the start program folder under
>> 'All Users'
>> The script is like this it will issue a log off command when we login; due
>> to this I am not able to login to my system even he himself not able to
>> access the system and solve the problem. The main thing is the script is of
>> '.pyw' type so I can't able to close the CMD window to stop this script
>>
>> How can I remove that script? Any help will be appreciated, thanks in
>> advance
>>
>> Abhilash
>>
>>
> Try running the machine in safe mode, then delete the script.
>
>
-------------- next part --------------
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From torriem at gmail.com  Thu May  1 13:10:57 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 11:10:57 -0600
Subject: Stream I/O to a java applet (os.popen?)
In-Reply-To: <B8C92AA3C7F77B4D9042166511E2089301252746@nbss01.NBSS.NBED.NB.CA>
References: <B8C92AA3C7F77B4D9042166511E2089301252746@nbss01.NBSS.NBED.NB.CA>
Message-ID: <4819F9A1.1020109@gmail.com>

Cody Woolaver wrote:
> This is all done at the terminal though and i need to have it done through a python file. I'm aware that i will have to use os.popen but am unfamiliar with how it works.

You'll probably want to look at the subprocess module, which replaces
the old os.popen stuff.  It's also a bit better at running on Windows.
There are lots of docs and examples relating to subprocess.  Probably
some good recipes too, especially for running on windows.  I'd begin by
looking on google for "python subprocess example windows."

Bear in mind interactive control of a subprocess is sometimes fraught
with difficulty, as it's easy to deadlock if you're waiting for the
subprocess to say something and it's waiting for you to say something.

On another track, you might want to consider using Jython, as it will
allow your python class file to interact directly with the Java stuff,
rather than having to do it via pipes and subprocesses.  The only
downside to Jython currently is it's stuck at Python 2.2 stuff.  But
it's a nice integration of Java and Python.


From arnodel at googlemail.com  Fri May 16 11:42:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 16:42:17 +0100
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
	<781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>
Message-ID: <m28wya8dd2.fsf@googlemail.com>

afrobeard <afrobeard at gmail.com> writes:

> Arnaud's code wont work if self.opt1 is None, an empty list, an empty
> tuple, False, etc, because all these evaluate to false. They wont
> print the internal state of these variables. [Just an informational
> notice, this may be the behavior you expect]

??? My suggestion is to get rid of attributes altogether and does not
test any truth values.

> Secondly, I'm not sure if you know the variable names from before hand
> in which case Casey's approach will work, or you need to know them via
> introspection. http://www.ibm.com/developerworks/library/l-pyint.html
> [Scroll down to attributes].
>
> On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Casey <casey.mcgi... at gmail.com> writes:
>> > Hi,
>>
>> > I have some classes that print variable outputs depending on their
>> > internal state, like so:
>>
>> > def __str__(self):
>> > ? ? out = []
>> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
>> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
>> > ? ? ....
>> > ? ? return '\n'.join(out)
>>
>> > Is there any way to make this cleaner?
>>
>> Maybe.
>>
>> Have a dictionary of options rather than individual attributes;
>> options not in the dictionary are not set. E.g.
>>
>> mask = {
>> ? ? 'opt1': 'option 1 is %s',
>> ? ? 'opt2': 'option 2 is %s',
>> ? ? ...
>> ? ? }
>>
>> def __str__(self):
>> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>>
>> --
>> Arnaud


From deets at nospam.web.de  Mon May  5 08:37:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 14:37:23 +0200
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <688dctF2rnddhU1@mid.uni-berlin.de>

globalrev wrote:

> class Foo(object):
> def Hello(self):
> print "hi"
> 
> object is purple, ie some sort of reserved word.

It is not.
 
> why is self in black(ie a normal word) when it has special powers.
> replacing it with sel for example will cause an error when calling
> Hello.

That must be some other problem. This is perfectly legal python code and
works:

class Foo(object):
    def bar(imafancyobject):
        print imafancyobject

f = Foo()
f.bar()

Diez


From gagsl-py2 at yahoo.com.ar  Mon May 26 20:34:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 21:34:51 -0300
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
Message-ID: <op.ubsekd05x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 20:32:58 -0300, Marc Pelletier  
<marc at stopspam.goldak.ca> escribi?:

> I am just getting started in Python with the intention of tweaking an
> opensource wxPython project called Brewsta. I've been reading python
> documentation and the code, and its starting to make sense, but there  
> seems
> to be an awful lot of boilerplate required to make such an application
> work.

That's strange - usually you don't require "an awful lot of boilerplate"  
in Python.

> Are there any ides that help out? There seem to be lots of options, and
> I've been downloading like crazy, but nothing so far that stands out. Are
> there any tips or tutorials specific to doing gui development?

I'm unsure if you're looking for a development environment like these:
http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
or an interface designer for wxPython (see the bottom part of  
http://wiki.python.org/moin/GuiProgramming)

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Fri May 23 15:24:41 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 12:24:41 -0700 (PDT)
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com> 
	<mailman.1510.1211558125.12834.python-list@python.org>
Message-ID: <3ab520b0-fd25-4026-9749-12bf06bfa6ab@p25g2000hsf.googlegroups.com>

On May 23, 11:42 am, Thomas Karolski <Thomas.Karol... at googlemail.com>
wrote:

> > You will note that Decorator does not define __init__.  In fact,
> > object.__init__ will be called, which does nothing.  If you think that
> > all classes with DecoratorType as their metaclass will be a direct
> > subclass of Decorator, you can get away with not calling
> > Decorator.__init__ at all.
>
> Now, inside my new version, I have a class which inherits from both
> Decorator and Window, out of which the __init__ for Decorator is not
> called. Does this prove to be a problem?

It sounds like it could create infinite recursion.  If your decorated
class inherits from Decorator, it should also get the DecorateType
metaclass, which should recursively try to create its own decorated
class, ad infinitum.  Unless I misunderstand what you meant.


> > Probably the best piece of advice is "Don't try to use Decorator
> > pattern".  :)
>
> Well, I decided on the decorator pattern, because I want to be able to
> change the behavior of classes during run-time. I did not really find
> any other pattern which would let me do that.


Ah.

Well it is possible to do that in Python. though there's probably not
an official design pattern for it (but then design patterns grew up
around less flexible languages, partially as a way to cope with their
lack of flexibility).  Here are a couple things to think about:

If you'd like to change the behavior of individual instances of a
class, you can assign functions to individual instances which act just
like methods.  (Warning: this does not work with operators.)

Here is an example:

    class A(object):
        def say_hello(self):
            print "hello, world"

    a = A()

    def custom_hello():
        print "hello, my name is Inigo Montoya"

    a.say_hello = custom_hello


If you'd like to change the behavior of all instances of the class,
then you can assign a new method directly to the class after it was
created:

    def new_default_hello(self):
        print "hello, children"

    A.say_hello = new_default_hello


Notice that you need to use self when assigning it to the class
object, and not to use self when assigning it to an instance of the
class.


Carl Banks


From cjw at ncf.ca  Mon May 12 11:04:15 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Mon, 12 May 2008 11:04:15 -0400
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <482855df$0$14196$9b622d9e@news.freenet.de>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
	<482855df$0$14196$9b622d9e@news.freenet.de>
Message-ID: <g09m9n$c8h$1@theodyn.ncf.ca>

Martin v. L?wis wrote:
>> 1.I have both 2.5 and 2.6 but both appear, under Recent Projects, as
>> pcbuild.  It would be helpful if the Python Version could be indicated.
> 
> Hover over the link, and it will display the full path, which you can
> then infer to reason about the specific copy of Python you are using.

Lovely, thanks.  It's at the bottom of 
the screen.

> 
> In any case, compiling Python 2.5 with VS 2008 is not supported.
> 
>> 2.With 2.6, Python compiles and executes OK but various packages are not
>> compiled, eg sqlite3.
> 
> See PCbuild/readme.txt.

I presume that this is PCbuild8.txt

> 
>> 3.Pythonw compiles OK but not sqlite3.
> 
> So what's the error?
> 
>> 4.Mike Fletcher suggests an approach
>> (http://www.vrplumber.com/programming/mstoolkit/) with Visual C for
>> Python 2.4.  Is this still the recommended way to compile Python 2.6?
> 
> No. Either use the full product, or the express edition. Neither
> requires and additional setup.
> 
>> 5.Python 2.5 source refers to an Older Visual C.  Automatic conversion
>> to Visual C 2008 gives the message ?Some of the properties associated
>> with the solution could not be read.?  All projects except one had a
>> single warning, there were no errors reported.
>> 6.After conversion there is no python project, it is flagged ?unavailable?.
> 
> See above. This procedure is not supported; you are on your own.
> Get a copy of VS 2003 if you want to follow the official
> recommendations.
> 
>> 7.Pythoncore builds with no errors and 6 warnings but there is no
>> executable.
>> 8.Python 2.5 build _tkinter fails ? tcl.h not found.
> 
> See PCbuild/readme.txt.
> 
> Regards,
> Martin

Thanks.  I'll look at the readme more 
carefully and seek VS 2003.

Now, I would like to remove Python 2.5 
from VS 2008 but see no obvious way of 
getting rid of it.

Colin W.


From lists at cheimes.de  Thu May  1 08:07:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 14:07:53 +0200
Subject: Is vs Equality Operator
In-Reply-To: <706397.16040.qm@web35903.mail.mud.yahoo.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <4819B299.9090903@cheimes.de>

Good Z schrieb:
> Hello, 
> I am having problem in using is. Here is what i am doing.
> 
> x=''
> if x is None or x is '':
>         return 1
> 
> The above statement does not return value 1.
> 
> If i changed the above check to 
> if x == None or x == '':
>         return 1
> Now it works fine.
> 
> Any idea. What is happening here. I am using python 2.4.4 on ubuntu.

Never use the identity operator "is" on strings and numbers! In most of
the cases it won't do what you are expecting.

The behavior can be explained with with a simple analogy. You have a
street with a STOP sign on both ends. The stop sign on the near end is
equal to the stop sign on the far end. Both have the same form, colors
and meaning. The stop signs are also equal to every other stop sign in
your town. However the stop signs are NOT identical. They occupy two
different places and they are made from two totally different sets of atoms.

When you want to know if the stop sign on the near end is a stop sign,
you have to use the equality == operator. But if you want to check if
you are referring to exactly the one and only stop sign at the near end
of your road and no other sign in the universe you have to use 'is'.

HTH

Christian



From marco at sferacarta.com  Mon May 12 04:47:49 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 10:47:49 +0200
Subject: module global variables
In-Reply-To: <a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
Message-ID: <VuTVj.40306$o06.27577@tornado.fastwebnet.it>

pistacchio wrote:
> On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
>> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>>
>>> hi to all!
>>> can i load a module passing to it, automatically and as default, all
>>> the caller's global variables to act as module's global variables?

Are you positively sure you need this?

Modifying imported modules is already quite fragile, but this.. it's 
basically a reversed(import *)

It's quite messy. Where quite equals to "very"


From hdante at gmail.com  Thu May 22 00:26:32 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:26:32 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com>

On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>>> a = 1e16-2.
> >>> a
> 9999999999999998.0
> >>> a+0.999 ? ? # gives expected result
> 9999999999999998.0
> >>> a+0.9999 ? # doesn't round correctly.
>
> 10000000000000000.0

 Notice that 1e16-1 doesn't exist in IEEE double precision:
 1e16-2 == 0x1.1c37937e07fffp+53
 1e16 == 0x1.1c37937e08p+53

 (that is, the hex representation ends with "7fff", then goes to
"8000").

 So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
This is not a bug, it's a feature.


From daraburke78 at gmail.com  Tue May 20 06:26:53 2008
From: daraburke78 at gmail.com (dbee)
Date: Tue, 20 May 2008 03:26:53 -0700 (PDT)
Subject: Report Lab Image Flowable Issue ..
Message-ID: <d6c04510-bd2c-4c3b-8b19-f503b36ff3ad@d45g2000hsc.googlegroups.com>

I'm try to generate a report that will span multiple pages and have
dynamic content using python reportlab. I have no issues with regards
to generating images and then using     p.drawInlineImage(signup_img,
100,150)  to draw them onto the canvas.

The problem that i have comes when i try to create flowables so that
my layout can span multiple pages. The images themselves never
actually show up on the page ...

    # Import pdf
generator
    from cStringIO import StringIO
    from reportlab.pdfgen import canvas
    from reportlab.pdfgen.canvas import Canvas
    from reportlab.lib.styles import getSampleStyleSheet
    from reportlab.lib.units import inch
    from reportlab.platypus import Paragraph, Frame
    from PIL import Image

    # Create the HttpResponse object with the appropriate PDF
headers.
    response = HttpResponse(mimetype='application/pdf')
    response['Content-Disposition'] = 'attachment;
filename=somefilename.pdf'

    buffer = StringIO()

    styles = getSampleStyleSheet()
    styleN = styles['Normal']
    styleH = styles['Heading1']
    story = []

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(Paragraph("""This is a paragraph in <img src='http://
images.google.com/intl/en_ALL/images/images_hp.gif' width='200'
height='200' /> style"\
"",styleN))

    c = Canvas(buffer)
    f = Frame(inch, inch, 6*inch, 9*inch, showBoundary=1)
    f.addFromList(story,c)
    c.save()

    # Get the value of the StringIO buffer and write it to the
response.
    pdf = buffer.getvalue()
    buffer.close()
    response.write(pdf)

This should generate a pdf with the google image in it no ? The pdf
gets generated but no image comes out.

When I try the other option of using image flowables, I get only an
error. The reportlab docs example shows an Image flowable being called
like ... Image("lj8100.jpg")   .... but when i try to call the object
directly i get an error which suggests that i should use Image.new or
Image.open to call the object ...

    # Create image from /tmp
    im = Image("/tmp/car_dealership.jpg", width=2*inch, height=2*inch)
    im.hAlign = 'CENTER'

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(Image(im))

TypeError: 'module' object is not callable for the im = Image( ....)

When i try to feed the image manually ...

    interest_image = interests_barchart(request)
    im = Image.open(StringIO(interest_image.content))

    #add some
flowables
    story.append(Paragraph("This is a Heading",styleH))
    story.append(im)

I get ... AttributeError: getSpaceBefore    ... which seems to suggest
that im isn't a flowable ...

Can anyone help pls ?


From pavlovevidence at gmail.com  Thu May  1 19:32:00 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 16:32:00 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
Message-ID: <071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>

On May 1, 4:50 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:
> > On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> >> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
> >> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> >> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> >> > IMO .ini-like config files are from the stone age. The modern
> >> >> > approach is to use YAML (http://www.yaml.org).
>
> >> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> >> >> and so comprehensively and completely fails to achieve its stated
> >> >> main goal of being "readable by humans", that I had assumed it was
> >> >> an April Fool along the lines of Intercal or brainf***.
>
> >> > YAML, ISTM, took a simple concept that worked for small,
> >> > straightforward data, and tried to make into a format that could
> >> > anything anywhere, with disastrous results.  It's not unlike Perl in
> >> > this regard.  It's quite ridiculous.
>
> >> > My recommendation to the OP would be:
>
> >> > If you intend to write a GUI that completely sets all the options,
> >> > use XML.  You can bet there are some users who would prefer text
> >> > editing options files, and XML, while not the most readable format
> >> > available, at least gives users the option.
>
> >> > If you don't intend to write a GUI to do that, write a simple text
> >> > file parser (if the options are simple), use ConfigParser, or use a
> >> > Python file that you exec.
>
> >> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> >> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
> >> > using the Windows registry to store options; use it to modify Windows
> >> > behavior (like file associations) but keep your own program's options
> >> > in your own file.
>
> >> If you don't like YAML, use JSON or something similar -- XML is
> >> overkill and .INI is too limited.
>
> > I don't think you know the OP's requirements enough to know whether INI
> > or XML is suitable. You're welcome to suggest alternatives but what I
> > suggested is fine.
>
> > As for XML being overkill for anything, I highly disagree. XML is
> > suitable for the smallest tasks.  These days I use XML for almost all my
> > data exchange needs: including conf files.  Elementtree makes it
> > possible to process XML and pull out some typical data in ten or so
> > lines of code.  What could possibly be overkill about that?
>
> > Carl Banks
>
> I used XML for almost everything in the past until I found YAML.
> Elementtree makes it easy but not easy enough.

I'm honestly very happy for you that you have found the data transfer
format that you are happy with, but I'm sorry, that doesn't amount to
a blanket invalidation of everything you've ever tried and rejected.


> The most powerful thing
> about YAML is that it was designed to map directly to native data types
> in languages like Python (see another my post in this thread for
> example). And this means that simple YAML files will always be easier to
> process in Python than XML or INI. And this in turn means that OP with
> any requirements will have to write less code to read and write his
> config files.

I will mention that Python already has, built in, a data transfer
format that maps directly to Python types: pickle.

And not only that, it's more readable than YAML.


I will also add that what you think of as a strength is not always
thought of as a strength by everyone.  In my early days of Python, I
would use pickle for all kinds of things.  I've now pretty much
switched entirely to XML, because I no longer believe that direct
correspondance to Python types is a good thing; at least it isn't for
me.  There is a very basic reason for this: whenever I write a pair of
tools, one to output some XML data, and another further down the chain
to read it back in, I hardly ever want the data to have the same
structure in memory in both tools.  For me, YAML or pickle would not
gain me anything; I'd be doing all that reformatting anyway.


Of course, the OP wasn't talking about data transfer, he was talking
about a freaking config file.  Reading in a config file is a
ridulously silly thing to try to hyperoptimize.  Do you really want
him to add an extra dependency just to reduce code used by five lines?


Carl Banks


From erik.oosterwaal at gmail.com  Sun May 25 12:58:55 2008
From: erik.oosterwaal at gmail.com (erik.oosterwaal at gmail.com)
Date: Sun, 25 May 2008 09:58:55 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
Message-ID: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>

Hi All,

I have been developing websites in classic asp using VB script for a
long while now. Due to the fact that I also took a detour to
developing ColdFusion, and the fact the companies I work(ed) for never
had time or money for courses, I am now in the awkward position that I
am -still- developing classic ASP.

In it, I have become quite resourceful, I wrote a framework using WSC
(windows scripting components) to separate logic from presentation,
and my display pages use almost no logic, except for the loops and
variables I need to build my pages. I have a three-tier setup and all
business logic is in separate WSC files. The framework even uses an
ORM for access to the tables of my database. This works like a charm.
It makes classic ASP code maintainable, it makes working in classic
ASP very pleasant actually and it makes our customers very happy.

The problem is that classic asp is now a dead language, I need to
modernize and fast! Although the arguments some people make against it
are not valid for me (spaghetti code, unmaintainable, slow), I still
see that there is little to no support for it anymore.

The most logical way to "update" my knowledge to something more
modern, would be to dive into ASP.NET. I considered that for a long
time, but there are some problems with this:

1. I love the control I have over my html using inline, template-based
vbscript. ASP.NET's web forms really sound like a very bad idea, also
the approach Microsoft takes in trying to make a stateless web-app
seem like a statefull application is IMHO a burden. I think webapps
are inherently different than desktop apps, and should be programmed
as such.

2. Who says Microsoft isn't going to pull the plug on VB.NET in a
while or make a drastic change like they did from asp to asp.net
again, some time in the future?

3. I like the rapid development I can do in a dynamic, loosely typed
language like vbscript. The performance-bottleneck of a site is mostly
in the database-access and the http-calls and I think writing all of
the declarations and types for a strong-typed language is overkill for
a webapp.

So that's when I started looking at other dynamic languages for
webdevelopment. I looked at Ruby on Rails and at the different web-
frameworks that are available for Python. The biggest problem there
for me is that the MVC type frameworks that are currently very popular
are also not what I'm looking for.

I like having my directory tree conform to the structure of my
website, so the "Controller" part of the MVC style of development is
something I wouldn't want. What I -would- like is a separation of code
and display logic (so being able to include libraries in a page) and
being able to intermix code directly into the HTML.

As Python would be the language I prefer over Ruby, I thought I'd ask
here to see if anyone in the Python community knows if such a
development-framework exists in Python. For example, does IronPython
also use the same web forms approach as asp.net using VB? The
frameworks I looked at (Django, Pylons) seem to be able to use
different templating engines, does that mean it's just a question of
finding the right one?

Also, for Python there is also the problem of meaningful indentation.
I'm not even sure if it's possible to use Python directly inside HTML,
because indentation would be at the very least tricky to maintain. I'm
kind of hoping here that there are some solutions to these problems
available in Python.

 Any help would be greatly appreciated.

Kind regards,

Erik


From efurman at admailinc.com  Wed May 14 13:17:00 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 14 May 2008 09:17:00 -0800
Subject: built in list generator?
In-Reply-To: <87hcd14vo0.fsf@benfinney.id.au>
References: <87hcd14vo0.fsf@benfinney.id.au>
Message-ID: <482B1E8C.1010800@admailinc.com>

Ben Finney wrote:

> Subject:
> Re: built in list generator?
> From:
> Ben Finney <bignose+hates-spam at benfinney.id.au>
> Date:
> Wed, 14 May 2008 09:43:43 +1000
> To:
> python-list at python.org
>
> To:
> python-list at python.org
> Newsgroups:
> comp.lang.python
>
>
>"Diez B. Roggisch" <deets at nospam.web.de> writes:
>
>  
>
>>globalrev schrieb:
>>    
>>
>>>if i want  a list with all numbers between x and y is there a way to
>>>do this with an inbult function.
>>>
>>>i mean i can always construct a function to do this but is there
>>>soemthing like:
>>>
>>>nbrs = list(range(50,100, 2))
>>>      
>>>
>>range *does* that. use xrange if all you want is to iterate.
>>    
>>
>
>Until Python 3.0, where 'range' returns an iterable.
>  
>
Is there a thread somewhere of the discussion for this change?  I'm 
presuming range is used almost exclusively in loops where a change in 
the return type would have no negative effect.
--
Ethan
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From ohad.frand at percello.com  Mon May 12 13:27:10 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Mon, 12 May 2008 20:27:10 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>

Hi

I am looking for a way to programmically get a list of all python
existing statements that I cannot access by __builtins__ or locals() 

(like ["assert","break","class",...])

 

Thanks,

Ohad

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From workitharder at gmail.com  Wed May 21 20:14:07 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:14:07 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
	<d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>
Message-ID: <f564d6f5-a6cf-45de-986e-eac1f2aaae04@r66g2000hsg.googlegroups.com>

On May 21, 3:28 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 4:21 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > Which is exactly what the python decimal module does.
>
> Thank you (and Jerry Hill) for pointing that out.  If I want to check
> Flaming Thunder's results against an independent program, I'll know to
> use Python with the decimal module.

Utterly shameless.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:31:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:31:42 -0300
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
Message-ID: <op.ua1d64myx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.fremiot at gmail.com> escribi?:

> I'm currently working on python embedding with C++. My goal is that
> the C++ part handle files writing/reading so that the Python part only
> works with buffers.
>
> I succeeded in buffer exchanges. The problem is that some of the files
> I read/write are python files so that, before embedding, I imported
> them as modules when I needed them.
>
> But now that the Python part only receive buffers, I can't do it
> anymore. So I wonder :
> - is it possible to import module from a buffer instead of files?
> - or is it possible to create a module object from my buffer?

Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c

-- 
Gabriel Genellina



From bj_666 at gmx.net  Sat May 17 00:57:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 17 May 2008 04:57:24 GMT
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <6976tkF31cvenU1@mid.uni-berlin.de>

On Sat, 17 May 2008 04:01:50 +0000, Ivan Illarionov wrote:

> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
> 
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

*The* use case IMHO are alternative constructors.  They belong to the
class, so functions are not as clear and it's possible to have more than
one class in a module with class methods of the same name, e.g.
`A.from_string()` and `B.from_string()` vs. `create_a_from_string()` and
`create_b_from_string()`.

And I don't see how functions can be inherited by sub classes like class
methods can.

Metaclasses are more clear than class methods?  You must be joking!?

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.

Writing meta classes just for alternative constructors seems to be more of
a mess to me.  Too much magic for such a simple case for my taste.

Ciao,
	Marc 'BlackJack' Rintsch


From timr at probo.com  Wed May 28 02:04:54 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 06:04:54 GMT
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <5dtp34thl4a0ipeb5lm550uslud0jhpvua@4ax.com>

Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>> 
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>> 
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>...
>No. Language does matter.

A good programmer keeps many tools in his toolbox, and understands which
tools provide the best service for the problem at hand.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From castironpi at gmail.com  Sat May 10 08:10:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 05:10:13 -0700 (PDT)
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org> 
	<68ku74F2sm1usU1@mid.uni-berlin.de>
Message-ID: <afe776ab-70f4-4b42-8bce-14b137a6478e@8g2000hse.googlegroups.com>

On May 10, 1:38?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 10 May 2008 00:20:33 -0500, Kenneth McDonald wrote:
> > Any guesses as to how many people are still using Tkinter? And can ?
> > anyone direct me to good, current docs for Tkinter?
>
> AFAIK `Tkinter` hasn't changed much over time, so "old" documentation is
> still current.
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch

Get synchronizing into wx.  CallAfter and CallLater both pull too
hard, but I didn't write it for money.  How are specs doing on coming
down?  Window size is important.  Does anyone else bounce around
resizability either?

Ciao.


From rajarshi.guha at gmail.com  Wed May 14 12:13:09 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Wed, 14 May 2008 09:13:09 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com> 
	<dc4255fc-798b-419d-8fff-5965cf9b8c0a@k13g2000hse.googlegroups.com>
Message-ID: <da028d4f-e1fc-48c7-86ba-3bb747433d15@z72g2000hsb.googlegroups.com>

On May 13, 6:57 pm, afrobeard <afrobe... at gmail.com> wrote:
> If I were you, I'd show them actual code and how easy it is to get
> things done. Showing them how to implement a GTalk Bot[http://
> code.google.com/p/pygtalkrobot/] or how to build simple arcade games
> with PyGame[http://www.pygame.org/news.html] would harbor much more
> interest in my opinion because it'll show them their own power. There
> may be some people who oppose this approach under the pretext that
> students taking introductory programming courses should be taught C
> because it incorporates the discipline that is much needed if they
> want to become hard core CS researchers.


Thanks for the pointers. I agree with your comments - the students are
not necessarily going towards CS - there are many from telecom,
business etc. That was one of the big reasons for using Python - the
ability to get stuff done easily and quickly


From wizzardx at gmail.com  Sat May  3 20:10:16 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 02:10:16 +0200
Subject: Light slices + COW
In-Reply-To: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
Message-ID: <18c1e6480805031710r5e332200y8f1a792383f30f5f@mail.gmail.com>

>  That xpairs() generator is nice, but it's not the best possible code
>  (but you may disagree with me, and you may think that code better than
>  the successive D code that uses two slices). Inside it I can't use a
>  list slicing because it copies subparts of the list, probably becoming
>  too much slow (for example if len(seq) == 1000).

What do you mean by best possible? Most efficient? Most readable? And
why don't you use islice?

eg:

def xpairs(seq):
    len_seq = len(seq)
    for i, e1 in enumerate(seq):
        for e2 in islice(seq, i+1, None):
            yield e1, e2

Here's a version which makes more use of itertools. It should be more
efficient, but it's ugly :-) (this is my first time using itertools).

def xpairs(seq):
    def _subfunc():
        for i in xrange(len(seq)):
            e1 = seq[i]
            yield izip(repeat(e1), islice(seq, i+1, None))
    return chain(*_subfunc())

>  That D code is as fast or faster than the code you can back-translate
>  from Python, this is possible because in D arrays slices are very
>  light, they are a struct of <length, pointer>

D compiles to efficient machine code so Python is at a disadvantage
even if you use the same syntax (see my first example). You can make
the Python version faster, but beware of premature optimization.

>  I think Python 3.0 too may enjoy a similar strategy of light slices +
>  COW for strings, lists and arrays (tuples and strings don't need the
>  COW).

What I'dlike to see is a rope[1] module for Python. I'ts in C++'s STL
library[2], but I haven't found a Python version yet.

[1] http://en.wikipedia.org/wiki/Rope_(computer_science)
[2] http://www.sgi.com/tech/stl/Rope.html

With a Python rope library you could do things like this:

a = '<some extremely long string>'
b = rope(a) # Contains a reference to a
c = b[0:100000] # Get a rope object
d = b[100000:200000] # Get another rope object
e = b + b # Get another rope object
print e # Get the string representation of all the re-assembled sub-sections

# And so on. In the above code there was only 1 copy of the huge
string in memory. The rope objects only contain a tree of
sub-operations (slices, concatenations, references to original
sequences, etc).

This shouldn't be too hard to implement. Does anyone know of an
already-existing 'rope' module?

David.


From workitharder at gmail.com  Wed May 21 15:05:17 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 12:05:17 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <fbc4f5fd-5ed2-4f84-9dae-d75e84a09729@y21g2000hsf.googlegroups.com>

On May 21, 11:38 am, Mark Dickinson <dicki... at gmail.com> wrote:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
>
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> a = 1e16-2.
> >>> a
> 9999999999999998.0
> >>> a+0.999     # gives expected result
> 9999999999999998.0
> >>> a+0.9999   # doesn't round correctly.
>
> 10000000000000000.0
>
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?
>
> Mark

I see it too


From castironpi at gmail.com  Tue May 20 14:07:46 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 11:07:46 -0700 (PDT)
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com> 
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com> 
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com> 
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com> 
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com> 
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com> 
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
Message-ID: <4233fb45-f144-423d-aae8-e9fa623ea029@j22g2000hsf.googlegroups.com>

On May 20, 10:40?am, "David C. Ullrich" <dullr... at sprynet.com> wrote:
> In article <20080520154802.4b5df647 at hyperspace>,
>
>
>
>
>
> ?pataphor <patap... at gmail.com> wrote:
> > On Tue, 20 May 2008 06:12:01 -0500
> > David C. Ullrich <dullr... at sprynet.com> wrote:
>
> > > Well, ok. Like I said, I never _took_ the position that it _should_
> > > be a list of lists, I just said I didn't see the advantage to using
> > > a single list.
>
> > I'm now thinking about a list of lists containing single element lists.
>
> > def test():
> > ? ? n = 3
> > ? ? R = range(n)
> > ? ? M = [[[i+j*n] for i in R] for j in R]
> > ? ? for L in M:
> > ? ? ? ? print L
> > ? ? row2 = M[1]
> > ? ? print
> > ? ? print row2
> > ? ? col3 = [L[2] for L in M]
> > ? ? print col3
> > ? ? col3[1][0]=9
>
> > print col3
> > ? ? print row2
> > ? ? print
> > ? ? for L in M:
> > ? ? ? ? print L
>
> > if __name__=='__main__':
> > ? ? ? ? test()
>
> > The idea is to use a single element list as kind of storage facility.
> > That enables me to copy a column, then change something in that column
> > and make the change turn up in the matrix and even in a previously made
> > copy of a row that shared the specific element.
>
> > > Today's little joke: Long ago I would have solved
> > > this by storing the data as a list of rows and _also_
> > > a list of columns, updating each one any time the
> > > other changed. Just goes to show you things
> > > could always be worse...
>
> > Well have I ever ... I only thought about this last week and I
> > actually thought it was a *good* idea.
>
> Sorry. If you really want to do this you could keep things
> in sync automatically by writing the appropriate __setitem__
> and resolving never to modify the data except through that...
>
> def whatever.__setitem__(self, (row,col), value):
> ? self.rows[row][col] = value
> ? self.cols[col][row] = value
>
> Seems to me like an, um, "untenable" waste of space. And you'd
> need to be certain to never set anything except through
> self[row,col]; as far as I can see anything like setrow()
> would be a loop "for col in range(width): self[row,col] =".
>
> Hmm. You could keep the data in some object that encapsulates
> the two double lists and use some fancy feature (__getattribute__?)
> to make certain that the only possible access to the data
> was through __getitem__...
>
>
>
>
>
> > I only gave up on it because
> > now I would have to keep ?track of how far the two views are out of
> > sync, because some operation could use data that was modified by an
> > other view. Zipstar transposition is very handy for syncing, but it is
> > also very expensive. But probably not for you.
>
> > > Expressing interest is a big mistake...
>
> > How so? ;-)
>
> > > Sometime soon a thread will appear titled something
> > > like "indexed attributes" with a stripped-down but
> > > functional example of what I have in mind for Matrix
>
> > I can't wait! Keep up the good work.
>
> > P.
>
> --
> David C. Ullrich- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

You can use tuples in dictionaries.

Example:

>>> a= {}
>>> a[0,1]= 2
>>> a[2,3]= 7
>>> a[0,1]
2


From _karlo_ at _mosor.net_  Wed May 21 19:13:12 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Wed, 21 May 2008 23:13:12 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
Message-ID: <Xns9AA6C693A2A6mosornet@161.53.160.65>

I'm not sure if Python can do this, and I can't find it on the web. So, 
here it goes:


try:
    some_function()
except SomeException:
    some_function2()
    some_function3()
    ...
    # somehow goto 'try' block again

In case it's not clear what I meant: after executing some_function() 
exception SomeExcpetion gets risen. Then, in except block I do something 
to fix whatever is causing the exception and then I would like to go back 
to try block, and execute some_function() again. Is that doable?

Thanks.


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From ivan.illarionov at gmail.com  Sat May 10 13:33:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 10 May 2008 10:33:26 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
Message-ID: <7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>

On 10 ???, 21:22, notbob <not... at nothome.com> wrote:
> On 2008-05-10, Diez B. Roggisch <de... at nospam.web.de> wrote:
>
> > notbob schrieb:
> >> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
> >> dir, same permission, etc.
>
> > I'm pretty sure you misse the correct shebang -
>
> Sorry.  Both exactly the same.  I checked 5 times.
>
> helloworld shebang:  #!/usr/bin/python
> while shebang:       #!/usr/bin/python
>
> (above yanked from respective scripts)
>
> nb

Shebang is certainly broken, possible causes:
1. Wrong line endings (should be \n)
2. Whitespace before the shebang

-- Ivan


From __peter__ at web.de  Fri May 23 04:12:00 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:12:00 +0200
Subject: pickle error: can't pickle instancemethod objects
References: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>
Message-ID: <g15u8f$t0f$03$2@news.t-online.com>

Michele Simionato wrote:

> Can somebody explain what's happening with the following script?

>     def __gestate__(self): # should skip the bound methods attributes

Must be __getstate__ ;)

Peter



From gherron at islandtraining.com  Thu May  1 18:33:09 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 01 May 2008 15:33:09 -0700
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <481A4525.6020205@islandtraining.com>

AlFire wrote:
> Hi,
>
> I have a piece of software which uses threads in very massive way - 
> like hundreds of  them generated every second.
>
> there is also a piece of code which maintains the number of 
> outstanding threads, simply
>
> counter+=1 is executed when before starting the thread and counter-=1 
> after it finishes.
>
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
>
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as 
> expected.
>
> I guarded those statement with Lock.{acquire,release} and now it 
> always returns 0.
>
>
> But I still can not believe that +=1 is not a thread safe operation.
>
>
> Any clue?
>
Of course it's not thread safe.   For the same reason and more basic, 
even the expression i++ is not thread safe in C++.

Any such calculation, on modern processors, requires three operations: 
  retrieve value of i into a register,
  increment the register
  write the value into i.

If a thread is interrupted anywhere within that sequence, and another 
thread access i, you have a conflict.  (And indeed, hardware interrupts 
can occur between any two instructions.)

Gary Herron



From deets at nospam.web.de  Thu May 29 09:44:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 15:44:26 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <6a7qarF35bvivU1@mid.uni-berlin.de>

Christian Meesters wrote:

> Hi
> 
> I'm having trouble with Py_BuildValue. I was able to pinpoint the
> following statement as the one causing a seg. fault with my script:
> 
> static PyObject * funcname(PyObject *self, PyObject *args) {
> ...
>   return Py_BuildValue("(OO)", x, y);
> }
> where x & y are both of type PyObject.
> 
> Any suggestions here? Do I need to handle the output of Py_BuildValue
> somehow before returning? How? Need to decref x & y before returning?

Just a guess - but according to the docs of Py_BuildValue it will return a
tuple already when given a format string of several format units.

What happens if you get rid of the ()?

Diez


From mcknight0219 at gmail.com  Mon May 12 23:02:37 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 20:02:37 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
Message-ID: <58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>

On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
> On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
> > Well, i know it may be a little non-python thing, however, I can think
> >  of no place better to post this question :)
>
> >  can anyone tell me, in python, how to obtain some information of a
> >  running program?
> >  paticularly, if i am playing some music in audacious or other media
> >  player, how can i get the the name and some other info of current
> >  playing song? It seems that audicious doesn't output on run-time
> >  --
> >  http://mail.python.org/mailman/listinfo/python-list
>
> In most cases, you'll probably need some sort of API, either in the
> program itself or through some sort of plugin, that lets external
> programs query it.  For instance, there are some plugins to WinAmp
> that allow external programs (like Last.FM or Mog-O-Matic) to see what
> track is currently playing.  You may also be able to do something like
> get the window title (again, WinAmp's title bar usually includes the
> artist and title) and parse it out.  I don't really know that there's
> anything specific to Python for accessing these though, and it may
> vary depending on media player.
>
> Just my two cents...
>
> -dan

thanks!

In linux, I am always obfuscated by sort of APIs. Like how to get
title information of a running program?
where am I supposed to find these APIs


From rocky at panix.com  Wed May 28 23:18:15 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 28 May 2008 23:18:15 -0400
Subject: pydb remote debugging/cmd.Cmd over socket?
References: <6a5b8qF35n4hiU1@mid.uni-berlin.de>
Message-ID: <wihwsldztl4.fsf@panix5.panix.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> Hi,
>
> I'm fiddling around with pydb. Installation and usage are fine. What I
> especially like is the fact that you can attach a signal such that you drop
> into debugging mode on demand.
>
> But this is of limited use to me in situations where a server is written in
> python. According to the source, pydb's debugger class Gdb extends cmd.Cmd.
>
> It passes stdin/stdout-arguments that should be usable to replace the
> standard streams. But so far all my experiments simply dropped the process
> into debugging mode putting out and getting io over stdin/stdout - not my
> self-supplied streams.
>
> So I wonder (being a bit rusty on my UNIX-piping-skillz): how does one do
> that - essentially, create a remote python shell using cmd.Cmd? 
>
> Diez

As part of the 2006 Google Summer of Code project Matt Flemming
started working on remote debugging in pydb. Alas it wasn't completed
and I let the code fall through the cracks. 

Matt claimed it worked to some degree but I could never get it to work
for me. Most definitely the code has atrophied.

The user interface was loosely based or reminiscent of gdb. So
you'd run pydbserver either as a command inside the debugger or as an
option to pydb or call inside Python pdbserver after importing. 

There is a connection class (file pydb/connection.rb) which was to
allow different kinds of protocols, like a socket connection or 
a serial line connection, or maybe even two FIFO's so that you could
connect to a different process on the same computer.

And there were some commands on the user-interaction side
to attach or detach the Python program you want to debug.

If you look in pydb.py.in and gdb.py.in you'll see some code commented
out with double hashes which is part of this effort.

I invite you or others to try to resurrect this effort. However as I
look at the code now, it doesn't make much sense other than the broad
outline given above.

Another approach and possibly a much simpler one if you are looking
for a Python debugger which supports remote debugging is Winpdb
http://winpdb.org/ by Nir Aides.




From code at pizzashack.org  Sat May  3 00:48:49 2008
From: code at pizzashack.org (Derek Martin)
Date: Sat, 3 May 2008 00:48:49 -0400
Subject: RegEx for matching brackets
In-Reply-To: <4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
	<ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>
	<4465e4ed-6a37-48a3-ac0d-f3da316301a4@26g2000hsk.googlegroups.com>
Message-ID: <20080503044849.GH17661@dragontoe.org>

On Fri, May 02, 2008 at 03:51:16PM -0700, NevilleDNZ wrote:
> Thanx for the link to these parsers. ANTLR looks interesting.
> Yoyo: http://www-users.cs.york.ac.uk/~fisher/software/yoyovwg/readme
> 
> I figured out a way to do it in python.
[...]
> 
> def check_open_close(str):
>   try:
>     eval("".join({"{":"[","}":"],"}[c] for c in re.findall( "([{}])|(?:
> [^{}]+)", str) if c))

Ouchie...  It may be short, but if I had to maintain this code, and I
saw this, your name would be used in sentences with lots of curse
words. ;-)  That's one hard-to-read line of code...  Also this may or
may not do what you want it to do -- I think it doesn't...  

This problem is the classical example of when to use a stack (Last-In,
First-Out) data structure.  If all you want to do is make sure that
the line has the same number of opens and closes in a line, your code
does that.  But if you actually want to verify the syntax (i.e. make
sure that there are the same number of open brackets as close
brackets, AND make sure that they occur in the correct order, opens
first, closes last, AND that the closes come in the same (reverse)
order as the opens), your code does not do that.

I changed the tests in your code (specifically the brackets, and
nothing else) to demonstrate this:

DETECTED:   { a test  BAD
DETECTED:   { a test } OK
# This should fail, because the closing ] comes before the open [
MISSED:   { a test ] [ a test } BAD
DETECTED:   { a test } { this { a test } is a test } OK
# this should fail, for the above reason, and because the order is wrong
MISSED:   { a test  { this { a test ] is a test } missing close [}} BAD
DETECTED:   { a test  { this { a test ] is a test } missing close } BAD
# this should also fail for both reasons
MISSED:   { a test  ] this { a test } is a test } missing close [ BAD
DETECTED:   a test } { this { a test } is a test } BAD
DETECTED:   { a test } this { a test } is a test } BAD

It doesn't detect the brackets in the right order (opens before
closes), nor does it detect that they occur in the correct sequence.

Clever code isn't always so clever...  I think there's something to be
said for writing code that's a little bit more lengthy, but easier to
understand.  This version is only a few lines longer than yours (in
total, not counting the comments), but it is a bit clearer and easier
to follow.  Note that I added angle brackets and mixed the bracket
types in the tests.  I also didn't use your referee...  In my code,
the test simply succeeds if the brackets match, and fails if they are
unbalanced or out of order.

#!/usr/bin/python

# define the matching pairs
bm = { '}': '{', 
       ']': '[', 
       ')': '(', 
       '>': '<' }

def bracket_balance(str):
    # initialize the stack to an empty list
    blist = []
    for c in str:
        # If c is an open bracket of any type, place on stack
        if c in bm.values():
            blist.append(c)
	# If it is a close bracket, pull one off the stack and
	# see if they are matching open-close pairs.  If the stack
	# is empty, there was no matching open.  Return false in that
	# case, or if they don't match.
        if c in bm.keys():
            try:
                foo = blist.pop()
            except IndexError: 
                return False
            if foo != bm[c]:
                return False
    # End of the line: if we still have brackets on the stack, we
    # didn't have enough close brackets.  Return false.
    if blist != []: 
        return False
    # If we got here, the stack is empty, and there are no brackets
    # left unmatched.  we're good!
    return True

tests="""
  { this is a test  BAD
  < this is a test > OK
  { this is a test } { this is a test } OK
  { this is a test } [ this { this is a test } is a test ] OK
  { this is a test  { this { this is a test } is a test } missing close BAD
""".splitlines()[1:]

for test in tests:
    print "Testing %s:" % test
    if bracket_balance(test):
        print "-> OK" 
    else:
        print "-> FAILED"

Testing with your original set of tests:

$ ./brackets.py 
Testing   { this is a test  BAD:
-> FAILED
Testing   < this is a test > OK:
-> OK
Testing   { this is a test } { this is a test } OK:
-> OK
Testing   { this is a test } [ this { this is a test } is a test ] OK:
-> OK
Testing   { this is a test  { this { this is a test } is a test } missing close BAD:
-> FAILED

Testing with my modified set of tests:

$ ./brackets.py 
Testing   { a test  BAD:
-> FAILED
Testing   { a test } OK:
-> OK
Testing   { a test ] [ a test } BAD:
-> FAILED
Testing   { a test } { this { a test } is a test } OK:
-> OK
Testing   { a test  { this { a test ] is a test } missing close [}} BAD:
-> FAILED
Testing   { a test  { this { a test ] is a test } missing close } BAD:
-> FAILED
Testing   { a test  ] this { a test } is a test } missing close [ BAD:
-> FAILED
Testing   a test } { this { a test } is a test } BAD:
-> FAILED
Testing   { a test } this { a test } is a test } BAD:
-> FAILED

In all cases, this code correctly identifies when the brackets are out
of order, or unbalanced.

-- 
Derek D. Martin
http://www.pizzashack.org/
GPG Key ID: 0x81CFE75D

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From bignose+hates-spam at benfinney.id.au  Fri May  2 01:50:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 15:50:22 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
Message-ID: <87ve1xz23l.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 13:24:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > I much prefer "#! /usr/bin/python" because I want my Python
> > programs to, by default, be run with the default Python, and
> > depend on Python being installed by the operating system's package
> > manager. On systems that use shebang lines and that actually have
> > standardised filesystem locations, the default Python is found at
> > '/usr/bin/python'.
> 
> You have lived a sheltered life.  Not every packaging system puts the
> executible in /usr/bin.  Many systems use /usr/local/bin.

They use that for the operating-system-installed default Python
interpreter? Colour me incredulous.

-- 
 \           ?[The RIAA] have the patience to keep stomping. They?re |
  `\        playing whack-a-mole with an infinite supply of tokens.? |
_o__)                                  ?kennon, http://kuro5hin.org/ |
Ben Finney


From umpsumps at gmail.com  Fri May  9 17:19:38 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Fri, 9 May 2008 14:19:38 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
Message-ID: <54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>

> > What would be the best method to print the top results, the one's that
> > had the highest amount of anagrams??  Create a new histogram dict?
>
> You can use the max() function to find the biggest list of anagrams:
>
> top_results = max(anagrams.itervalues(), key=len)
>
> --
> Arnaud

That is the biggest list of anagrams, what if I wanted the 3 biggest
lists?  Is there a way to specific top three w/ a max command??



From jeffrey at fro.man  Tue May  6 14:15:04 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 06 May 2008 11:15:04 -0700
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<gJidnXxLHfWV973VnZ2dnUVZ_vudnZ2d@cablespeedwa.com>
	<X71Uj.15556$pI4.12568@fe101.usenetserver.com>
Message-ID: <9OGdnYcw57m1Pb3VnZ2dnUVZ_vCdnZ2d@cablespeedwa.com>

notbob wrote:

> Do python scripts require the:
> 
> #!/usr/bin/env python

An appropriate shebang is required if you intend to use the module itself as
a script, from the command line, like:

    $ ./my_module.py  argument argument ...

It is not required merely to import the module into a python program or
interpreter. Even without the shebang, the module can be run indirectly
with:

    $ python ./my_module.py argument argument ...

or, if the module is somewhere on your sys.path:

    $ python -m my_module argument argument ...


Jeffrey


From stef.mientki at gmail.com  Sat May 10 15:25:47 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 10 May 2008 21:25:47 +0200
Subject: how to reference my own module ?
Message-ID: <4825F6BB.9090707@gmail.com>

hello,

I've a library that I import as
 
    import ppygui.api as gui

the reason for this construct is that I've to use different libraries 
for different platforms.

Now I like to write some examples in the library (activated by if 
__name__ == '__main__' :)
and I would that these examples can be used in the user program just by 
copy / paste.

For calling a function / class in the user program I've to write:

    sizer = gui.VBox ()

So also write exactly the same sentence in the library examples,
but  "gui" is not recognized

Any ideas how I can realize the above ?

thanks,
Stef Mientki





From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 10:01:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 16:01:15 +0200
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <4824592a$0$26517$426a74cc@news.free.fr>

grbgooglefan a ?crit :
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.

Do you really need a function for this ?

if "foo" in "foobar":
    print "do you really really need a function for this ?"


> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1

which is a convoluted way to write:

   return s2 not in s1


> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?

Err... How to say... The boolean negation operator in Python is "not". 
So the only answer I can provide is : "use 'not' instead of '!'". And 
while we're at it : drop those useless parens.

HTH


From dikkie at nospam.org  Wed May 28 19:43:18 2008
From: dikkie at nospam.org (Dikkie Dik)
Date: Thu, 29 May 2008 01:43:18 +0200
Subject: Python's tail -f implementation for remote files
In-Reply-To: <483dda9a$0$11598$607ed4bc@cv.net>
References: <483dda9a$0$11598$607ed4bc@cv.net>
Message-ID: <483dee16$0$1279$bf4948fe@news.tele2.nl>

asdf wrote:
> Basically what i want to do is to read a file
> that is being constantly appended to but which
> is located on a remote server.
> I found this for doing BASH's tail -f in python:
> 
> import os
> tailoutputfile = os.popen('tail -f syslog')
> while 1:
>     line = tailoutputfile.readline()
>     if len(line)==0:   # change the termination condition 
>         break
>     process_line(line)
> 
> and it works great. But not sure how to use this with
> ssh command to connect to remote machine.
> 
> Any tips?

ssh host_address 'tail -f file_name'

Should do it (from the command line). Off course, you can put this into 
popen as well. If you log in with a public key (see ssh-keygen), you do 
not have to supply a password using the console.

Best regards.


From notbob at nothome.com  Sat May 10 19:22:00 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 23:22:00 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <s6qVj.8627$Qw5.2820@fe107.usenetserver.com>

On 2008-05-10, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> 	So... in short, you'd need to have been reading a tutorial specific
> to "shell" scripting...

I have been.  I'm also trying to learn bash shell scripting, not to mention
sed/awk, php, etc.  I should have started this a long time ago, but I'm lazy
and, like I said, I'm not particularly fond of coding.  Yes, I have learned
basic C and basic , but never beyond intro.  Now, I'm doing it because I'm a
geezer and I figure my brain needs more exercise then just blabbing on
usenet.  Besides, I've been cruising while using linux for too long and have
remained low end intermediate.  Time to get serious.  Pass the cheat sheets!

nb




From tarun.kap at gmail.com  Fri May  2 16:35:30 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 13:35:30 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<858f0130-2d19-4429-8f80-346aa5cc7c9f@r66g2000hsg.googlegroups.com>
Message-ID: <8667e17a-705c-4984-af05-4ba59d2dd26d@m3g2000hsc.googlegroups.com>

On May 2, 3:09 pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 2, 3:04 pm, TkNeo <tarun.... at gmail.com> wrote:
>
>
>
> > On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> > wrote:
>
> > > TkNeo wrote:
> > > > WHAT ?
>
> > > > This is crazy
>
> > > Crazy like a fox?
>
> > > a = [1, 2, 3]
> > > try:
> > >      a.index(99)
> > > except:
> > >      a.append(99)
> > > finally:
> > >      print a.index(99)
>
> > > MY question: which exception should I actually be catching there?
> > > ** Posted fromhttp://www.teranews.com**
>
> > ofcouse try catch is going to work but in ideality the index function
> > should return a -1 and no way in hell crash.
>
> Please refrain from making such inane comments after an hour or two of
> toying with a new language. Read a good tutorial first (e.g.http://diveintopython.org/toc/index.html) and come back if you have a
> real question.
>
> George

George - I am not trying to be negative in any way whatsoever.

0 - In my first post in this thread, i was just being sarcastic.
1- I have been using python for more than an year or so. Just not an
avid user as probably you are.
2. You suggest me to ask a "REAL" question. Real is a relative word.
What is real to you might not be real to lets say Guido van Rossum. I
met him a few months ago and he was very humble to all the stupid
questions i had.
3  The board does not specify the level of python developers who can
post questions.
4 -I have always heard that python community is based on sharing and
helping each other. Please keep those spirits up.

Thanks for replying and sorry for wasting your time.
TK



From maehhheeyy at gmail.com  Thu May  1 16:06:20 2008
From: maehhheeyy at gmail.com (maehhheeyy)
Date: Thu, 1 May 2008 13:06:20 -0700 (PDT)
Subject: i want to add a timeout to my code
References: <53ffe104-be3b-43e2-b5c8-4ce5886ac60d@b1g2000hsg.googlegroups.com>
	<1f70ea43-7909-4bd8-b63d-2467e8a0542f@c65g2000hsa.googlegroups.com> 
	<ac8721f0-fe0d-446b-8954-bd097e6d940a@f24g2000prh.googlegroups.com> 
	<mailman.351.1209508222.12834.python-list@python.org>
Message-ID: <2976bcad-e514-4a33-bf1a-5966997b6d42@1g2000prg.googlegroups.com>

On Apr 29, 3:29?pm, John Krukoff <jkruk... at ltgc.com> wrote:
> On Tue, 2008-04-29 at 14:47 -0700, maehhheeyy wrote:
> > On Apr 17, 4:24 pm, Miki <miki.teb... at gmail.com> wrote:
> > > On Apr 17, 1:10 pm,maehhheeyy<maehhhe... at gmail.com> wrote:
>
> > > > I want to add a timeout so that when I pull out my gps from my serial
> > > > port, it would wait for a bit then loop and then see if it's there. I
> > > > also want to add a print statement saying that there is no GPS device
> > > > found. However when I run my code and unplug my serial port, my code
> > > > will just hang until I plug it back in.
> > > > This is my code right now:
>
> > > > def GetGPS():
> > > > ? ? ? data = []
> > > > ? ? ? #Open com1: 9600,8,N,1
> > > > ? ? ? fi = serial.Serial(0, timeout = 1)
> > > > ? ? ? print '[gps module] SERIAL PORT OPEN ON COM1:'
>
> > > > can anyone help me please? Thanks.
>
> > >http://docs.python.org/lib/node545.html
>
> > > HTH,
> > > --
> > > Miki <miki.teb... at gmail.com>http://pythonwise.blogspot.com
>
> > I tried the code onto my codes but what came out was that in the line
> > signal.signal(signal.SIGSLRM, handler), an attributeError appeared
> > reading that 'module' object has no attribute 'SIGALRM'
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Are you writing your program on windows, or some other platform which is
> not unix?
>
> --
> John Krukoff <jkruk... at ltgc.com>
> Land Title Guarantee Company- Hide quoted text -
>
> - Show quoted text -

Yeah I'm using Windows 2000.


From banibrata.dutta at gmail.com  Sat May  3 05:28:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sat, 3 May 2008 14:58:26 +0530
Subject: Newbie question - probably FAQ (but not exactly answered by regular
	FAQ)
Message-ID: <3de8e1f70805030228y33b081faoa56fd251d48a3ae8@mail.gmail.com>

Hi,

I've gone through the list of "language differences" between 2.3 / 2.4
& 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
CPython, and I consider myself still very very newbie. So, unable to
take a call as to how-important or desirable the newer language
features are -- so whether to write my app for v2.5 of Python, versus,
as few others on this list have recommended, i.e. to stick to v2.3 ??
Are the preformance improvements, and memory footprint / leak fix in
2.5 enough to justify moving to it ? What all do I stand to lose (or
gain) by writing on v2.3 ??

I've a constraint due to which I might have to also write parts of my
app (client side) in Jython (because I want to eventually ship Java --
yet benefit from the rapid development and clarity of Python). Would
sticking to v2.3 in such a case be a better idea ? Suggestions with
reasoning would be very helpful.

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta


From gagsl-py2 at yahoo.com.ar  Sat May 17 01:33:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 May 2008 02:33:13 -0300
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <op.ua99pnrvx6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov  
<ivan.illarionov at gmail.com> escribi?:

> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.
>
> I can't see any use-case of them that couldn't be re-written more clearly
> with methods of metaclass or plain functions.

A good use case for class methods are alternate constructors, like  
dict.from_keys. I don't think an alternate constructor would be more clear  
being a method of the metaclass - actually it belongs to the class itself,  
not to its metaclass.
Metaclass methods are harder to find; they don't show in dir(instance) nor  
dir(class).
Also the resolution order is harder to grasp for metaclasses - but this  
may be just lack of usage from my part...

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place
> making your code a mess.

Not necesarily; some classmethods are naturally tied to the class itself,  
not to the metaclass (like the constructor example above). But yes, *some*  
classmethods could be written as methods of their metaclass instead - but  
that doesn't always make sense.

> 2. They are slower than metaclass methods or plain functions.

Hu? How did you come to that?
I've done a small test and a class method wins by a very minuscule but  
consistent advantage over a metaclass method:

class A(object):
     color = "red"

     @classmethod
     def foo(cls, x):
         return getattr(cls, x)

class MetaB(type):
     def foo(self, x):
         return getattr(self, x)

class B(object):
     __metaclass__ = MetaB
     color = "red"

C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"  
"A.foo('color')"
1000000 loops, best of 3: 1.19 usec per loop

C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"  
"B.foo('color')"
1000000 loops, best of 3: 1.2 usec per loop


-- 
Gabriel Genellina



From george.sakkis at gmail.com  Sat May 31 10:40:15 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 31 May 2008 07:40:15 -0700 (PDT)
Subject: How to add function return value
References: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>
	<7d89a189-1ce9-46d3-b200-2ad86858fa45@h1g2000prh.googlegroups.com>
Message-ID: <a01f02b1-7efb-4791-ac09-bec6bfeac5b9@w7g2000hsa.googlegroups.com>

On May 30, 10:16?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> On May 30, 6:21?pm, HYRY <ruoyu0... at gmail.com> wrote:
>
> > Can I write a decorator that it can automately do this conversion
>
> > def func1()
> > ? ? a = 1
>
> > --->
>
> > def func1():
> > ? ? a = 1
> > ? ? return locals()
>
> Not sure why you would want to do this, but there are several ways.
>
> 1. Make bytecode hack decorator that transforms the final "return
> None" into "return locals()". ?A recipe that shows the basic technique
> is at:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277940
>
> 2. Retrieve the source using inspect.getsourcelines(f). Then, append a
> "return locals()" to the end of the function and run it through exec.
>
> 3. Try hacking a tracing/debugging utility.
>
> 4. Run the sourcefile through tokenize, make the appropriate
> insertion, and then untokenize.


Here's an illustration of (3):

import sys
import functools

def withlocals(f):
    @functools.wraps(f)
    def wrapper(*args, **kwds):
        f_locals = {}
        def probe(frame, event, arg):
            if event == 'return':
                f_locals.update(frame.f_locals)
            return probe
        sys.settrace(probe)
        try: res = f(*args,**kwds)
        finally: sys.settrace(None)
        return (res, f_locals)
    return wrapper

# example

@withlocals
def foo(x, y=0, *args, **kwds):
    a = max(x,y)
    b = len(args)
    c = min(kwds.values())
    return a+b+c

r,locs = foo(1,2,3,4,a=5,b=6)
print locs

George


From marco_furchi at hotmail.com  Tue May 20 03:57:29 2008
From: marco_furchi at hotmail.com (marco furchi)
Date: Tue, 20 May 2008 09:57:29 +0200
Subject: fafdasf
Message-ID: <BAY107-W3854970E8360EEA8A28552E1C40@phx.gbl>


asdfdg
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From ivan.illarionov at gmail.com  Sat May 17 05:50:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 09:50:19 +0000 (UTC)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org>
Message-ID: <g0m9or$2qk0$1@news.mtu.ru>

On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:

> En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
> <ivan.illarionov at gmail.com> escribi?:
> 
>> After re-reading "Python is not Java" I finally came to conclusion that
>> classmethods in Python are a very Bad Thing.
>>
>> I can't see any use-case of them that couldn't be re-written more
>> clearly with methods of metaclass or plain functions.
> 
> A good use case for class methods are alternate constructors, like
> dict.from_keys. I don't think an alternate constructor would be more
> clear being a method of the metaclass - actually it belongs to the class
> itself, not to its metaclass.
> Metaclass methods are harder to find; they don't show in dir(instance)
> nor dir(class).
> Also the resolution order is harder to grasp for metaclasses - but this
> may be just lack of usage from my part...
> 
>> They have the following issues:
>> 1. You mix instance-level and class-level functionality in one place
>> making your code a mess.
> 
> Not necesarily; some classmethods are naturally tied to the class
> itself, not to the metaclass (like the constructor example above). But
> yes, *some* classmethods could be written as methods of their metaclass
> instead - but that doesn't always make sense.
> 
>> 2. They are slower than metaclass methods or plain functions.
> 
> Hu? How did you come to that?
> I've done a small test and a class method wins by a very minuscule but
> consistent advantage over a metaclass method:
> 
> class A(object):
>      color = "red"
> 
>      @classmethod
>      def foo(cls, x):
>          return getattr(cls, x)
> 
> class MetaB(type):
>      def foo(self, x):
>          return getattr(self, x)
> 
> class B(object):
>      __metaclass__ = MetaB
>      color = "red"
> 
> C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> "A.foo('color')"
> 1000000 loops, best of 3: 1.19 usec per loop
> 
> C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> "B.foo('color')"
> 1000000 loops, best of 3: 1.2 usec per loop

How did I come to this:
http://code.djangoproject.com/changeset/7098

I measured this and there was a marginal speed increase when classmethods 
wher moved to metaclass.

-- Ivan


From mail at timgolden.me.uk  Thu May 22 11:37:45 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 22 May 2008 16:37:45 +0100
Subject: Showing the method's class in expection's traceback
In-Reply-To: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
Message-ID: <48359349.3090501@timgolden.me.uk>

Agustin Villena wrote:
> I don't see things like you, because I'm accustomed to design my
> software
> though classes and see the code in an "object = software's functional
> atom/component" way
> I agree that python's dynamic nature make things complicated here, but
> for me it its just
> an implementation problem derived of the recent OOP support of python

(laughs). I do hope you're either joking or wearing a flameproof suit.
Python's dynamic nature as an implementation problem. Hmmm..
And what's that about "recent" OOP support of Python?

Oh well... 

TJG


From sophacles at gmail.com  Mon May 12 13:59:02 2008
From: sophacles at gmail.com (Erich)
Date: Mon, 12 May 2008 10:59:02 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <5c63d29d-a452-4831-aa68-4b8831f9e71d@s50g2000hsb.googlegroups.com>

On May 12, 12:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:

> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>

I am of the belief that there is no such thing as "useless learning",
or "bad learning"*. I have found that the more I learn about anything,
the better I am at everything. I think this is because more knowledge/
understanding does:
1. gives me more 'entry points' for new knowledge, I can relate more
bits to something I know, making the whole learning process easier.
2. allows me to better relate to people who I need to communicate
with, becuase it is more likely there is a common point of knowledge/
interest to build from
3. gives me personal satisfaction in my life (self-actualization).

When I learned python, I was a bartender, and was just learning it for
fun. Only later did I become a computer programmer. I was lucky enough
to find a job where I get to do a lot of my work in python.

* There are times when learning new info set A is more productive than
new info set B, depending on other constraints of time, energy, money,
etc, B could be classified as "unwise learning"

Regards,
Erich


From maxwell.newlands at gmail.com  Thu May 15 16:00:34 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 13:00:34 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
Message-ID: <8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>

you're right, my java implementation does indeed parse for Id3v2
(sorry for the confusion).  i'm using the getrawid3v2() method of this
bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
i buffer and parse.  apologies if i misrepresented my code!

back to python, i wonder if i'm misusing the mutagen id3 module.  this
brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
Mutagen/Tutorial) leads me to believe that something like this might
work:

from mutagen.mp3 import MP3
id3tags = MP3(urllib2.urlopen(URL))

but this gives me the following TypeError: "coercing to Unicode: need
string or buffer, instance found".  does this mean i need to convert
the "file-like object" that is returned by urlopen() into a unicode
object?  if so, do i just decode() with 'utf-8', or is this more
complex?  as of now, doing so gives me mostly "No such file or
directory" errors, with a few HTTP 404s.

anyway, thanks again....


On May 15, 1:02?pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> "John Krukoff" <jkruk... at ltgc.com> writes:
> > I'd love to know how Java handles all that automatically through a
> > generic stream interface, though.
>
> It could be that their stream interface supports seek(), and that
> seek()ing on HTTP connection sends the appropriate range request and,
> if it fails, throws an appropriate exception which the client code
> interprets as "seeking impossible, read the whole file".
>
> But that doesn't apply to the InputStream interface described athttp://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStream.html-- no
> seeking there.



From paul at science.uva.nl  Wed May  7 03:29:04 2008
From: paul at science.uva.nl (Paul Melis)
Date: Wed, 07 May 2008 09:29:04 +0200
Subject: PEP 370 question
Message-ID: <fvrlo0$v7$1@info.science.uva.nl>

In (the recently accepted) PEP 370 it says

"Current Python versions don't have a unified way to install packages 
into the home directory of a user (except for Mac Framework builds). 
Users are either forced to ask the system administrator to install or 
update a package for them or to use one of the many workarounds like 
Virtual Python [1], Working Env [2] or Virtual Env [3].

[...]

The feature can't be implemented using the environment variable 
PYTHONPATH. The env var just inserts a new directory to the beginning of 
sys.path but it doesn't parse the pth files in the directory. A full 
blown site-packages path is required for several applications and Python 
eggs."

I'm confused. For years I've been installing packages and extension 
modules locally using distutils's --prefix option, e.g. using

   python setup.py install --prefix=$HOME/local

Together with adding $HOME/local/lib/python2.4/site-package to my 
PYTHONPATH this works fine, even if there are packages that require a 
.pth file to work or that use Eggs (like setuptools and pygments).

So what limitation does the quoted paragraph in the PEP refer to?

Regards,
Paul


From vivainio at gmail.com  Thu May 15 09:30:51 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 15 May 2008 13:30:51 GMT
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
Message-ID: <87ve1fd78z.fsf@gmail.com>

Chris <cwitts at gmail.com> writes:

> On May 15, 2:27?pm, globalrev <skanem... at yahoo.se> wrote:

>> i have a big collection of .txt files that i want to open and parse to
>> extract information.
>>
>> is there a library for this or maybe even built in?
>
> os.open to open the files and iterate through it and built in string
> functions to parse it.

Or more probably, regular expression library "re".


From max at alcyone.com  Tue May  6 05:18:10 2008
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 06 May 2008 02:18:10 -0700
Subject: Decimal vs Float comparasion
In-Reply-To: <H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
References: <mailman.625.1210045932.12834.python-list@python.org>
	<H4GdnWAFfNzFlL3VnZ2dnUVZ_oesnZ2d@earthlink.com>
Message-ID: <L6SdnVaSOvHIv73VnZ2dnUVZ_oPinZ2d@speakeasy.net>

Dennis Lee Bieber wrote:

> On Tue, 6 May 2008 11:52:10 +0800, "Yuan HOng" <hongyuan1306 at gmail.com>
> declaimed the following in comp.lang.python:
> 
>> It seems to me that rather than allowing this to happen, comparasion
>> between the two should either be made correct (by convertion decimal
>> to float e.g.) or forbidden, like arithmatic operations between the
>> two types.
> 
> 	Why should decimal be coerced to float? Maybe float should be
> coerced to decimal?
> 
> 	Or... the programmer should explicitly specify what comparison is
> wanted -- if any...
> 
> 	Or... Isn't Python 3.x supposed to forbid mixed type comparisons
> unless the types implement suitable handling?

Bottom line is that it shouldn't silently return something insane. 
99999.0 is surely exactly representable in any modern floating point 
system, being a floating point representing of an integer, so silently 
returning a completely invalid comparison is a tremendously bad idea.

It's a bug.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
   Can I walk with you / 'Till the day that the world stops turning
    -- India Arie


From ankitanand1986 at gmail.com  Wed May 28 07:48:53 2008
From: ankitanand1986 at gmail.com (Ankit)
Date: Wed, 28 May 2008 04:48:53 -0700 (PDT)
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
Message-ID: <0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>

Thanks for replying guys but could you be a little more specific like
in terms of steps i shd follow to make the decoder and also how is
ffmpeg/libffmpeg going to help..


Regards
Ankit Anand


From kar1107 at gmail.com  Fri May  2 01:11:09 2008
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Thu, 1 May 2008 22:11:09 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
Message-ID: <7d00b02d-fe6b-4684-9197-5e1a7d2f5fef@y18g2000pre.googlegroups.com>

On May 1, 8:01 pm, Yves Dorfsman <y... at zioup.com> wrote:
> In the following script, m1() and m2() work fine. I am assuming m2() is
> faster although I haven't checked that (loops through the list twice instead
> of once).
>
> Now what I am trying to do is something like m3(). As currently written it
> does not work, and I have tried different ways, but I haven't managed to
> make it work.
>
> Is there a possibility ? Or is m2() the optimum ?
>
> Thanks.
>
> #!/usr/bin/python
>
> l = [ { 'colour': 'black',   'num': 0},
>        { 'colour': 'brown',   'num': 1},
>        { 'colour': 'red',     'num': 2},
>        { 'colour': 'orange',  'num': 3},
>        { 'colour': 'yellow',  'num': 4},
>        { 'colour': 'green',   'num': 5},
>        { 'colour': 'blue',    'num': 6},
>        { 'colour': 'violet',  'num': 7},
>        { 'colour': 'grey',    'num': 8},
>        { 'colour': 'white',   'num': 9}
>      ]
>
> def m1():
>    colours = [ e['colour'] for e in l ]
>    nums    = [ e['num']    for e in l ]
>
> def m2():
>    colours = []
>    nums    = []
>    for e in l:
>      colours.append(e['colour'])
>      nums.append(e['num'])
>
> #def m3():
> #  colours, nums = [ e['colour'], e['num'] for e in l ]
>

Looks like m1 is the cleanest; if you really want to run list-
comprehension once, one possible way:

>>> p = [ (e['colour'], e['num']) for e in l ]
>>> import operator
>>> map(operator.itemgetter(0), p)
['black', 'brown', 'red', 'orange', 'yellow', 'green', 'blue',
'violet', 'grey', 'white']
>>> map(operator.itemgetter(1), p)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>>

Karthik
> --
> Yves.http://www.SollerS.ca



From kamhung.soh at gmail.com  Fri May  9 18:25:27 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 10 May 2008 08:25:27 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
Message-ID: <op.uawq8posev04yd@hungvista>

On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:

>> > What would be the best method to print the top results, the one's that
>> > had the highest amount of anagrams??  Create a new histogram dict?
>>
>> You can use the max() function to find the biggest list of anagrams:
>>
>> top_results = max(anagrams.itervalues(), key=len)
>>
>> --
>> Arnaud
>
> That is the biggest list of anagrams, what if I wanted the 3 biggest
> lists?  Is there a way to specific top three w/ a max command??
>

Built-in max() function only returns one result.

My solution is to make a sorted list and return last three items:

sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From yves at zioup.com  Sun May 11 18:32:54 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Sun, 11 May 2008 22:32:54 GMT
Subject: How to call a file
In-Reply-To: <mailman.903.1210433607.12834.python-list@python.org>
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
	<mailman.903.1210433607.12834.python-list@python.org>
Message-ID: <quKVj.133609$Cj7.104353@pd7urf2no>

Gary Herron wrote:

> First of all, some terminology: You are not *calling* a file, you are 
> *opening* it or reading.

Wouldn't it be more correct to say that, in python, you either create a file 
object, or call a method for that object, once the object has been created ?



Yves.


From wuwei23 at gmail.com  Wed May 21 21:40:08 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:40:08 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com>
Message-ID: <e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com>

On May 22, 8:18 am, jonbutle... at googlemail.com wrote:
> Sorry, im new to both python and newsgroups, this is all pretty
> confusing. So I need a line in my __init__ function of my class? The
> spider class I made inherits from HTMLParser. Its just using the
> feed() function that produces errors though, the rest seems to work
> fine.

Let me repeat: it would make this a lot easier if you would paste
actual code.

As you say, your Spider class inherits from HTMLParser, so you need to
make sure that you set it up correctly so that the HTMLParser
functionality you've inherited will work correctly (or work as you
want it to work). If you've added your own __init__ to Spider, then
the __init__ on HTMLParser is no longer called unless you *explicitly*
call it yourself.

Unfortunately, my earlier advice wasn't totally correct... HTMLParser
is an old-style object, whereas super() only works for new-style
objects, I believe. (If you don't know about old- v new-style objects,
see http://docs.python.org/ref/node33.html). So there are a couple of
approaches that should work for you:

    class SpiderBroken(HTMLParser):
        def __init__(self):
            pass # don't do any ancestral setup

    class SpiderOldStyle(HTMLParser):
        def __init__(self):
            HTMLParser.__init__(self)

    class SpiderNewStyle(HTMLParser, object):
        def __init__(self):
            super(SpiderNewStyle, self).__init__()

Python 2.5.1 (r251:54863, May  1 2007, 17:47:05) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> html = open('temp.html','r').read()
>>> from spider import *
>>> sb = SpiderBroken()
>>> sb.feed(html)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\lib\HTMLParser.py", line 107, in feed
    self.rawdata = self.rawdata + data
AttributeError: SpiderBroken instance has no attribute 'rawdata'
>>> so = SpiderOldStyle()
>>> so.feed(html)
>>> sn = SpiderNewStyle()
>>> sn.feed(html)
>>>

The old-style version is probably easiest, so putting this line in
your __init__ should fix your issue:

    HTMLParser.__init__(self)

If this still isn't clear, please let me know.

- alex23


From dstromberglists at gmail.com  Sun May 11 15:44:09 2008
From: dstromberglists at gmail.com (Dan Stromberg)
Date: Sun, 11 May 2008 19:44:09 GMT
Subject: diffing and uniqing directories
References: <mailman.233.1209233669.12834.python-list@python.org>
Message-ID: <d0IVj.3118$17.1282@newssvr22.news.prodigy.net>

On Sat, 26 Apr 2008 23:44:17 +0530, Rustom Mody wrote:

> Over years Ive collected tgz's of my directories. I would like to diff
> and uniq them
> 
> Now I guess it would be quite simple to write a script that does a walk
> or find through a pair of directory trees, makes a SHA1 of each file and
> then sorts out the files whose SHA1s are the same/different. What is
> more difficult for me to do is to write a visual/gui tool to help me do
> this.
> 
> I would guess that someone in the python world must have already done it
> [The alternative is to use some of the tools that come with version
> control systems like git. But if I knew more about that option I would
> not be stuck with tgzs in the first place ;-)]
> 
> So if there is such software known please let me know.
> 
> PS Also with the spam flood that has hit the python list I dont know if
> this mail is being read at all or Ive fallen off the list!

It doesn't have a GUI, but here's a python program I wrote for dividing 
large collections of files up into identical groups:

http://stromberg.dnsalias.org/~strombrg/equivalence-classes.html



From tjreedy at udel.edu  Mon May 12 19:21:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 19:21:41 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net><41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com><48275446$0$11628$607ed4bc@cv.net>
	<87mymw8nr0.fsf@benfinney.id.au><f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com><g08jvd$2k0g$1@news.mtu.ru>
	<87iqxk6nvs.fsf@benfinney.id.au><g08pnf$2lbi$1@news.mtu.ru>
	<877ie06kdl.fsf@benfinney.id.au>
Message-ID: <g0aje3$o8t$1@ger.gmane.org>


"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:877ie06kdl.fsf at benfinney.id.au...
| So, when not using the values that come from the controlling iterator,
| it's good to make that explicit. If Python supported it, we might
| prefer to use no name at all for something that isn't used, but the
| 'for' syntax doesn't allow that.

But I presume it could if [target 'in'] were optional.

for range(n): <stuff to do n times>

It is possible this has been proposed and rejected,
but I have no specific memory.

tjr





From castironpi at gmail.com  Thu May  8 19:56:12 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:56:12 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <bb9989f5-baa5-4761-9f71-d6c8bc8de71c@m73g2000hsh.googlegroups.com>

On May 8, 6:50?pm, Barry Warsaw <ba... at python.org> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On behalf of the Python development team and the Python community, I ?
> am happy to announce the third alpha release of Python 2.6, and the ?
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not ?
> suitable for production environments. ?We continue to strive for a ?
> high degree of quality, but there are still some known problems and ?
> the feature sets have not been finalized. ?These alphas are being ?
> released to solicit feedback and hopefully discover bugs, as well as ?
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you. ?If you find things broken or incorrect, please submit a bug ?
> report at
>
> ? ?http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
> ? ?http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
> ? ?http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions. ?If all goes ?
> well, next month will see the first beta releases of both, which will ?
> also signal feature freeze. ?Two beta releases are planned, with the ?
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
> ? ? ?http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry
>
> Barry Warsaw
> ba... at python.org
> Python 2.6/3.0 Release Manager
> (on behalf of the entire python-dev team)
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.8 (Darwin)
>
> iQCVAwUBSCORrnEjvBPtnXfVAQIK+QQAgEUtAvW7uo0BxMiT1bCAo2E9ZecWJ9xe
> DBgd/5IK8moITkqhqGAH5UvfytV6uPkOMgGIS/Uvk4hzhU3jwSopEIDJLFQ5nGtC
> lCzOHzkDjSNZ8Q2OOAI9mbSHY8grvVxCMB4X2SVXIEMZ6M/X1AcV2b0utp9O1w/l
> T/PEvP8U1uY=
> =2Tnb
> -----END PGP SIGNATURE-----

Does signal freeze signal signal freeze?  Or should ideas pend beta?


From banibrata.dutta at gmail.com  Fri May  9 09:23:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 18:53:26 +0530
Subject: Pythonwin
In-Reply-To: <11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>

if one has installed ActiveState Python 2.5, I think it'd have been
  Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
and I think it delivers IDLE, not PythonWin.


On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:
>
> On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
> > Hi
> >
> > I am trying to use Python with ArcGIS.
> >
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> >
> > How do you install or launch pythonwin??
> >
> > Thanks
> >
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From inhahe at gmail.com  Sun May 18 03:42:58 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 03:42:58 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
Message-ID: <r5RXj.48195$3v1.31693@bignews3.bellsouth.net>


What advantages do teams have? in what? over who? when?  If they have
any use at all,
what language is good for them?  How do programming teams interact?
It sounds fun.  I'm not sure I want to get work done so much as talk,
but programming is fun.

-the advantages of teams in general is the organization of effort.
-with 10 people doing 10 things in their own individually chosen
-directions, you get 10 little things done. with 10 people doing 10
-things in a team, you get 1 big thing done that's 10 times as large.
-(some things that can be done can only be done as big things; i.e
-not everything is scalar in a practical sense). and that's not even
-including synergy.  perhaps i should have said, the "coalition
-/coalescence" of effort, as the organization of it is a different
-matter.  that's a harder animal to tackle.  it also applies to
-computing itself.  why is programming useful? because of its
-organization. why is a CPU useful? because of its organization.
-why is an organization useful?  why are systems effective? is the
-universe a system? is it thusly a matter of reciprocality? (as
-affected and affecter are two sub-systems of the universe)
-a team's advantage is in accomplishing a goal that all members
-agree to accomplish.  this may involve compromising on their
-own goals just enough to do something close but similar that can
-actually get done.  but it gets more complex than that as a lot of
-people join programming teams to make money and put bread on
-the table.  the economy becomes the team. and then you get into
-game theory and realize that sometimes just because a system
-falls into a certain order doesn't mean it's the most mutually
-beneficial way of doing things.
-a programming team wouldn't have an advantage "over"
-somebody unless it's a competing company.  but then those
-companies also have teams so it wouldn't be having a team
-per se that gives an advantage "over" them. although teams
-of programmers would have advantage over every would-be
-single programmer that would want to program a competing
-product.  but do those people even count?  they're not in the
-arena.
-even with a programming team, what language to use depends on
-what the goal is.  although it also depends on the preconceptions
-of ill-informed higher-ups.  i'm not prepared to say, though, that
-some programming languages aren't more amenable to
-team-work than others.

I'd start to discuss state property in appertanance to city property.
What are some properties of the state?

-what states have more than cities: power.  universality.  levels of
-beaurocracy.  global relevance. size.  superordination.  time.

You would have to introduce a computer to a (finite?) way of
expressing language, provided it *expresses* at rates over time that
do not exceed its input (impression), and limited by the complexity
bound of the architecture.  Tangent: architecture complexity.

-hmm. expression vs. impression rates represents symmetry in flow.
-conservation of information.  complexity of architecture is static.
-so i wonder what dimension that affects.  the only thing I can think of
-is that regardless of your flow control if your architecture is too
-simple then people will realize that it's not sentient.  they may realize
-that anyway but they'd be less entertained.  basically, your computer
-would be less effective at achieving its goals in a complex arena.  but
-not all arenas are complex. (people are, yes.)

In order to recreate 'propositional knowledge', you have to tell it.
Accumulating could amount to hashing video feed over time.  What do
you know about what's on the screen?  Naturally, as symbols are
logical, the video would have to be of something you want from it,
even if it's high spirits.

-i don't fully understand this logic and i don't fully agree with it so i
-won't comment.

I am less concerned about the audio, but maybe video is just one way
of learning.  What information do the mic inputs convey from a spoken
voice?  (And how do you summarize that?)

-it's probably easier to gather information from audio.  but then you can
-gather more at a time from video (with more holistic requirements).  but
-then if you're measuring how much you can gather per byte of input
-stream (thus putting 'at a time' into the von neuman computing arena or
-perhaps bandwidth allowance) then it's hard to say (as video requires
-more bytes per sense-time).
-to summarize, mic inputs convey a) one's voice (it's part of why people
-fall in love..), b) words and sentences; semantic content; formal
-(or informal) facts (already in propositional form) (depending on the
-the theoretical limits for AI speech recognition), c) intonation and 
emphasis
-of those words (largely requires understanding of the psyche for
-interpretation). but i'm not going to say that a computer can necessarily
-understand psyche (or one's voice); it's cosmic.
-also, words can express facts from anywhere at any time.  video
-expresses an event or a state at one particular place at one
-one particular time.  so, even though the facts of words are
-compressed (assimilated semiotically, symbolic, serialized), they can
-give you a lot more factual context on a global scale with which
-to understand the behavior of people everywhere, and moreso their
-words, such as the words in this newsgroup, which you like to participate 
in.

And what results are on video summaries are there so far?  I would
start with difference primitives on video.  How does the same work for
voice?

-i don't understand the last two sentences.
-as for video you should understand solidity, classical mechanics and
-perspective to get some sort of objectivity in its interpretation. perhaps
-color also.  (the next higher level of contextual understandig/objectivity
-can only come from words and/or the "cross-sum" of countless videos.
-try an encyclopedia.)

Of course, human understanding may come across the difference in form
of artifacts of hardware, but of course, the crossing operation is non-
trivial to perform, audio and video.  I'm not mentioning smell because
crossing it sounds risky.  Whaddya know.

-risky? interesting.  how would you get smell input anyway?

Now creation and recreation *decompose* into creation and time, spec.
real iteration., but where I'm from, creation and time are known to
cross means; if I have inferred correctly so far, you want a computer
to recreate.  If so, you want creation in act to tell a story.  I
think it's more fun to make them up than tell computers, and if we're
by them, can we tell a story on a newsgroup?  Who understands best in
the cross-sum of { Newsgroup, Newsgroup + task, Computer }?  Who wants
to define cross-sum?

-you're the only one fusing newsgroups and computers.  and i'm the only
-one that's paying attention, so i guess the answer is either you, or I.
-you're asking /us/ to define cross-sum? suspiciously flippant. ;)

---
To those who don't want me to feed the bot, I'm sorry.  It's not a bot, and 
I don't know the policy on having philosophical conversations.








From lixinyi.23 at gmail.com  Thu May 29 02:47:29 2008
From: lixinyi.23 at gmail.com (lixinyi.23 at gmail.com)
Date: Wed, 28 May 2008 23:47:29 -0700 (PDT)
Subject: How to get all the variables in a python shell
Message-ID: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>

Hi!

I'm currently working on a scientific computation software built in
python.
What I want to implement is a Matlab style command window <->
workspace interaction.

For example, you type 'a=1' in the command window, and you see a list
item named 'a' in the workspace.
You double click the icon of the item, and you see its value. You can
modify the value of the list item,
1 -> 100 etc,  after which if you go back to the command window and
type 'a'  and press enter, you see that
varable a's value has been changed to 100.

So my question is : if you have two DOS command windows running under
WINDOWS OS, how can you make them share the same internal variable
buffer? Or is there any easier way to implement such kind of
interaction?

Maybe I could just build a small database to store all the values and
access them from both programs, but chances are sometimes I have to
deal with big arrays, and they will eat extra memory if I keep them in
a database. Is there anyway to access a shell's local memory buffer?
I tried to use shell.interp.locals() in wxPython, but there's too many
variables in the list which I don't actually need.

Come on guys, give me some ideas. Thanks in advance!


From duncan.booth at invalid.invalid  Fri May 30 03:27:33 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 May 2008 07:27:33 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
Message-ID: <Xns9AAE5603C921Bduncanbooth@127.0.0.1>

"D'Arcy J.M. Cain" <darcy at druid.net> wrote:

> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?
> 
A minor point of netiquette: it's fine to reply by email to a message if 
you want to make a point off group, but if you are following up to the 
newsgroup/mailing list please don't CC the original sender: they will see 
the message in any case on the newsgroup and getting it twice is just 
likely to annoy.

I don't understand your problem: it's just a single thread so killfile or 
skip it.

-- 
Duncan Booth http://kupuguy.blogspot.com


From kapoornir at gmail.com  Mon May  5 20:23:07 2008
From: kapoornir at gmail.com (Rakhi)
Date: Mon, 5 May 2008 17:23:07 -0700 (PDT)
Subject: Python Programmer position available in New York
Message-ID: <62503df2-3e7e-43b7-8900-71bea747ee0b@f24g2000prh.googlegroups.com>


Title: Python Programmer
Location: Orangeburg, NY 10962
6 months position

Roles and responsibilities:-

?         Designs and codes from specifications, analyzes, evaluates,
tests, debugs, documents, and implements moderately complex software
applications. Prepares detailed specifications.

 ?         Provide programming skills to augment team capacity.
Project consists of coding and deploying new version of in-house web
based applications to new production platform.

?         Skills required include - substantial object oriented
programming knowledge, substantial web based programming experience,
solid working knowledge of python programming language, experience
with apache web server, web frameworks (e.g. cherry py) , and linux/
unix operating system Experience with telecommunications services or
equipment is a plus.

?         Candidate will need work with the existing team and interact
with the BA/QA personnel.

?         Skills: Python, Apache, Linux/ Unix Operating system



Please email your resume to the below mentioned email.


Regards,
Rakhi Kapoor |
Direct: 212-381-0614 |
Email: rakhi.kapoor at mastech.com | Web: www.mastech.com |
1000 Commerce Drive, Suite 500 | Pittsburgh, PA 15275 |



From kyrie at uh.cu  Thu May  8 19:14:06 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 8 May 2008 19:14:06 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <200805081914.06459.kyrie@uh.cu>

On Thursday 08 May 2008 06:54:42 pm wxPythoner at gmail.com wrote:
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.

Actually, I've always written it as (-123)**0. At least where I'm from, 
exponentiation takes precedence even over unary "-". (to get a power of -123, 
you must write $(-123)^0$ [latex])

Though not an authoritative source, wikipedia also uses the (-x)^y notation:
http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one

Btw, there seems to be a math problem in python with exponentiation... 

>>> 0**0
1

That 0^0 should be a nan or exception, I guess, but not 1.

[just found out while trying the poster's example]

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From space.captain.face at gmail.com  Thu May 29 04:44:53 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 01:44:53 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>

On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

You can use the cmp(x, y) function to tell if a string is similar to
another.

going cmp('spam', 'eggs') will return 1 (spam is greater than eggs)
(have no idea why)
swapping the two give -1
and having 'eggs' and 'eggs' gives 0.

is that what you were looking for?


From deets at nospam.web.de  Sat May 24 10:20:26 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 16:20:26 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
Message-ID: <69qmhcF33pou1U1@mid.uni-berlin.de>

Tool69 schrieb:
> Hi,
> 
> Until now, I was running my own static site with Python, but I'm in
> need of dynamism.
> 
> After reading some cgi tutorials, I saw Joe Gregorio's old article
> "Why so many Python web frameworks?" about wsgi apps [http://
> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
> question about it. The code he gave works like a charm (I had to make
> a little change because SQLAlchemy has changed since), but how the
> hell can I serve static files (css, js, images, etc.) within an wsgi
> app, ie inside a '/static' directory ?!

There is a wsgi-app out there that is called "static". Use that.

And it's the first hit on google "wsgi static"... :)

http://lukearno.com/projects/static/

Diez


From ivan.illarionov at gmail.com  Thu May 22 16:02:13 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 22 May 2008 20:02:13 +0000 (UTC)
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<5PjZj.78772$%15.70394@bignews7.bellsouth.net>
Message-ID: <g14jg5$3104$1@news.mtu.ru>

On Thu, 22 May 2008 15:29:42 -0400, inhahe wrote:

> "Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message
> news:5RiZj.165543$ng7.151222 at en-nntp-05.dc1.easynews.com...
>> Is there an easy way to get a list comprehension to produce a flat list
>> of, say, [x,2*x] for each input argument?
>>
>> E.g., I'd like to do something like:
>>
>> [ [x,2*x] for x in range(4) ]
>>
>> ...and receive
>>
>> [ 0,0,1,2,2,4,3,6]
>>
>> ...but of course you really get a list of lists:
>>
>> [[0, 0], [1, 2], [2, 4], [3, 6]]
>>
>> I'm aware I can use any of the standard "flatten" bits of code to turn
>> this back into what I want, but I was hoping there's some way to avoid
>> the "lists of lists" generation in the first place?
>>
>> A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
>> with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
>> with "zip" to do so?
>>
>> Thanks,
>> ---Joel
>>
>>
> i figured out a solution
> 
> sum([x,2*x] for x in range(4)],[]) #not tested sum(zip(list1,list2),())
> #not tested
> 
> (you did say you knew of ways to flatten, but i dunno if you knew of
> that way or not)
> 
> as an aside, i wish that sum didn't have to take the second parameter.
> it's kind of superfluous.  it can just use the first item as the initial
> value instead of 0 when no initial value is specified.   it would be a
> little complex to do without putting a conditional in your main loop and
> slowing it down, but it could be done.


If you don't want the second parameter use reduce():

>>> reduce(operator.add, ([x, x*2] for x in xrange(4)))
[0, 0, 1, 2, 2, 4, 3, 6]

>>> reduce(operator.add, zip([1,2,3],[4,5,6]))
(1, 4, 2, 5, 3, 6)

or:
>>> reduce(lambda x, y: x.extend(y) or x, ([x, x*2] for x in xrange(4)))
[0, 0, 1, 2, 2, 4, 3, 6]

-- Ivan


From castironpi at gmail.com  Wed May  7 16:40:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 13:40:31 -0700 (PDT)
Subject: howto print binary number
References: 021f52a9-4d18-4e0a-acdd-3a08cca4a4e5@z72g2000hsb.googlegroups.com
Message-ID: <ce84a847-d200-4fb8-af2c-aed0c03954ee@b1g2000hsg.googlegroups.com>

On May 7, 3:31?pm, Mensanator <mensana... at aol.com> wrote:
> On May 7, 3:13?pm, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > hi all,
> > could you inform how to print binary number?
> > I.e. something like
>
> > print '%b' % my_number
>
> > it would be nice would it print exactly 8 binary digits (0-1, with
> > possible start from 0)
>
> > Thank you in advance, D
>
> The gmpy works good.
>
> >>> import gmpy
> >>> print gmpy.digits(66,2).zfill(8)
>
> 01000010

>>> print '\n'.join( [ ''.join( [ str( a>> i & 1 ) for i in range( 7, -1, -1 ) ]
 ) for a in range( 10 ) ] )
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00000111
00001000
00001001


From dgetsman at amirehab.net  Wed May 21 12:12:52 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 09:12:52 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
Message-ID: <c4f8c979-2385-474d-b221-3fb48ed2ee21@e39g2000hsf.googlegroups.com>

Okay, so I manged to kludge around the issue by not using
the .readline() in my 'for' statement.  Instead, I'm slurping the
whole file into a new list that I put in for that purpose, and
everything seems to be working just fine.  However, I don't know WHY
the other method failed and I'm at a loss for why that didn't work and
this is working.  I'd really like to know the why about this issue so
that I don't have to use crappy coding practice and kludge around it
the next time I have an issue like this.

Any ideas much appreciated.

Damon G.


From thorsten at thorstenkampe.de  Fri May  2 09:51:53 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Fri, 2 May 2008 15:51:53 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
Message-ID: <MPG.22853ae1f293060998975a@news.individual.de>

* Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> The OP was asking why people prefer on over the other. My answer is
> that I prefer specifying "give me the default OS Python" because
> anything not installed by the OS is to non-standardised for me to
> worry about.
> 
> Others may prefer something different, but then they get to wear
> whatever problems occur as a result of that choice. I continue to be
> bemused by that preference, and nothing that I've seen so far in this
> thread illuminates the issue more.

You're missing the point. Apart from the really dubious terms you use 
("OS installable package"), using env in the first line has exactly the 
effect to use the default path of Python (which is the first entry in 
your path) and not some hard-coded path (which might not even exist).

Thorsten


From gherron at islandtraining.com  Thu May  8 11:17:48 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 08 May 2008 08:17:48 -0700
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <4823199C.6060308@islandtraining.com>

Raxit at MyKavita.com wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>   
With Python, you can program with a smile on your face.

(Truly, when I found Python, programming became fun again.)

Gary Herron
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From yves at zioup.com  Thu May  1 23:01:10 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 03:01:10 GMT
Subject: help with list comprehension
Message-ID: <WtvSj.108013$Cj7.100899@pd7urf2no>


In the following script, m1() and m2() work fine. I am assuming m2() is 
faster although I haven't checked that (loops through the list twice instead 
of once).

Now what I am trying to do is something like m3(). As currently written it 
does not work, and I have tried different ways, but I haven't managed to 
make it work.

Is there a possibility ? Or is m2() the optimum ?


Thanks.



#!/usr/bin/python

l = [ { 'colour': 'black',   'num': 0},
       { 'colour': 'brown',   'num': 1},
       { 'colour': 'red',     'num': 2},
       { 'colour': 'orange',  'num': 3},
       { 'colour': 'yellow',  'num': 4},
       { 'colour': 'green',   'num': 5},
       { 'colour': 'blue',    'num': 6},
       { 'colour': 'violet',  'num': 7},
       { 'colour': 'grey',    'num': 8},
       { 'colour': 'white',   'num': 9}
     ]

def m1():
   colours = [ e['colour'] for e in l ]
   nums    = [ e['num']    for e in l ]

def m2():
   colours = []
   nums    = []
   for e in l:
     colours.append(e['colour'])
     nums.append(e['num'])

#def m3():
#  colours, nums = [ e['colour'], e['num'] for e in l ]





-- 
Yves.
http://www.SollerS.ca


From vijayakumar.subburaj at gmail.com  Thu May  8 03:06:06 2008
From: vijayakumar.subburaj at gmail.com (v4vijayakumar)
Date: Thu, 8 May 2008 00:06:06 -0700 (PDT)
Subject: python newbie: some surprises
Message-ID: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>

When I started coding in python, these two things surprised me.

1. my code is inconsistently indented with the combination of tabs and
spaces. Even lines looked intended, but it is not.

2. python requires to pass "self" to all instance methods

and I missed ":" often. :)


From temmokan at gmail.com  Sat May 24 02:45:04 2008
From: temmokan at gmail.com (Sagari)
Date: Fri, 23 May 2008 23:45:04 -0700 (PDT)
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com> 
	<4836b62b$0$24427$426a74cc@news.free.fr>
	<slrng3dfn3.7jn.nick@irishsea.home.craig-wood.com>
Message-ID: <5de30ef7-d9a2-493b-bc43-665339f52cd8@m3g2000hsc.googlegroups.com>

Thanks to everyone for the advice. In fact, since all the called
methods trap necessary exceptions, I see no big problems with that.

With all respect,

Konstantin


From deets at nospam.web.de  Thu May  8 06:48:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 12:48:39 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
Message-ID: <68g456F2t41nqU1@mid.uni-berlin.de>

krustymonkey at gmail.com wrote:

> I'm wondering if anyone can help with a workaround for a problem I
> currently have.  I'm trying to set up a prefork tcp server.
> Specifically, I'm setting up a server that forks children and has them
> listen on pipes created with os.pipe().  The parent process for the
> group starts an inet:tcp server on a given port.  In the parent, after
> a "socket.accept()", I'm trying to pickle the connection object to
> send over an IPC pipe (as stated previously), but I get the following
> error:
> 
> File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
>     raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining
> __getstate__ cannot be pickled
> 
> Does anyone know of a workaround for this?  Maybe my approach to this
> is wrong?  Any help would be appreciated.

The error-message is pretty clear I'd say. You use slots - so you are
responsible yourself for implementing the pickling-protocol using
__getstate__ and __setstate__. Looking at the pickle-docs should give you
an idea.

But the really easy solution is: do not use slots. They are intended as
memory-consumption optimization technique, *not* as "I want to declare my
attributes explicitly"-mechanism. So - get rid of them and be a happy
pickler.

Diez


From ivan.illarionov at gmail.com  Thu May  1 16:50:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 20:50:32 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
Message-ID: <fvdaen$1g2$2@news.mtu.ru>

On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:

> On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
>> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
>> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> >> > IMO .ini-like config files are from the stone age. The modern
>> >> > approach is to use YAML (http://www.yaml.org).
>>
>> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
>> >> and so comprehensively and completely fails to achieve its stated
>> >> main goal of being "readable by humans", that I had assumed it was
>> >> an April Fool along the lines of Intercal or brainf***.
>>
>> > YAML, ISTM, took a simple concept that worked for small,
>> > straightforward data, and tried to make into a format that could
>> > anything anywhere, with disastrous results.  It's not unlike Perl in
>> > this regard.  It's quite ridiculous.
>>
>> > My recommendation to the OP would be:
>>
>> > If you intend to write a GUI that completely sets all the options,
>> > use XML.  You can bet there are some users who would prefer text
>> > editing options files, and XML, while not the most readable format
>> > available, at least gives users the option.
>>
>> > If you don't intend to write a GUI to do that, write a simple text
>> > file parser (if the options are simple), use ConfigParser, or use a
>> > Python file that you exec.
>>
>> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
>> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
>> > using the Windows registry to store options; use it to modify Windows
>> > behavior (like file associations) but keep your own program's options
>> > in your own file.
>>
>> If you don't like YAML, use JSON or something similar -- XML is
>> overkill and .INI is too limited.
> 
> 
> I don't think you know the OP's requirements enough to know whether INI
> or XML is suitable. You're welcome to suggest alternatives but what I
> suggested is fine.
>
> As for XML being overkill for anything, I highly disagree. XML is
> suitable for the smallest tasks.  These days I use XML for almost all my
> data exchange needs: including conf files.  Elementtree makes it
> possible to process XML and pull out some typical data in ten or so
> lines of code.  What could possibly be overkill about that?
> 
> 
> Carl Banks

I used XML for almost everything in the past until I found YAML. 
Elementtree makes it easy but not easy enough. The most powerful thing 
about YAML is that it was designed to map directly to native data types 
in languages like Python (see another my post in this thread for 
example). And this means that simple YAML files will always be easier to 
process in Python than XML or INI. And this in turn means that OP with 
any requirements will have to write less code to read and write his 
config files.

-- 
Ivan


From bbxx789_05ss at yahoo.com  Sun May 11 15:06:30 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:06:30 -0700 (PDT)
Subject: Problem with custom events in wxpython
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
Message-ID: <223951e8-fb2f-44e8-b416-6cea30cfc66c@24g2000hsh.googlegroups.com>

On May 11, 7:23?am, Jimmy <mcknight0... at gmail.com> wrote:
> hi, all
>
> I'm having a problem with creating custom events in wxpython.
>
> I have a class A handling some data processing work and another class
> B of GUI matter. I need GUI to display information when data in A is
> updated.
> I know cutom events in wxpython may work. But I found no material
> paricularly
> helpful :(
>
> can anyone write me some demo code to show how to do this ...


This example works for me:


import wx

class MyCustomEvent(wx.PyCommandEvent): #or wx.PyEvent
    def __init__(self, event_type, id):
        wx.PyCommandEvent.__init__(self, event_type, id)

class A(object):  #Data Processing class
    def __init__(self, widget_to_update):
        self.widget_to_update = widget_to_update

        #create the custom event:
        self.my_event_type = wx.NewEventType()
        self.EVT_MY_CUSTOM_EVENT =
wx.PyEventBinder(self.my_event_type, 1)
	#Note: you need to make EVT_MY_CUSTOM_EVENT persist so that you
        #can refer to it in a later call to Bind()

    def process_data(self): #create thread here
        finished = True

	if finished:
            self.update_gui()


    def update_gui(self):
        #create a custom event object and enter it in the event queue:
        my_evt_obj = MyCustomEvent(self.my_event_type,
self.widget_to_update.GetId() )
 
self.widget_to_update.GetEventHandler().ProcessEvent(my_evt_obj)


class B(object):  #Gui class
    def __init__(self):
        frame = wx.Frame(None, -1, "My Window")

        panel = wx.Panel(frame, -1)
        button = wx.Button(panel, -1, "Start Data Processing",
pos=(100, 10))
        button.Bind(wx.EVT_BUTTON, self.onclick)

        self.text_ctrl = wx.TextCtrl(panel, -1, "Hello World",
pos=(100, 50), size=(200, 20))

        self.a = A(self.text_ctrl)
        frame.Bind(self.a.EVT_MY_CUSTOM_EVENT,
self.on_my_custom_event)

        frame.Show()

    def onclick(self, event):
        self.a.process_data()

    def on_my_custom_event(self, event):
        self.text_ctrl.SetValue("Finished Processing Data")


app = wx.PySimpleApp(redirect=False)
b = B()
app.MainLoop()




However, I couldn't get similar code to work when I derived the event
class from wx.PyEvent and used Bind() directly on the TextCtrl
(command events propagate up the container hierarchy while regular
events don't):

import wx

class MyCustomEvent(wx.PyEvent): #or wx.PyEvent
    def __init__(self, event_type, id):
        wx.PyEvent.__init__(self, event_type, id)

class A(object):  #Data Processing class
    def __init__(self, widget_to_update):
        self.widget_to_update = widget_to_update

        #create the custom event:
        self.my_event_type = wx.NewEventType()
        self.EVT_MY_CUSTOM_EVENT =
wx.PyEventBinder(self.my_event_type, 1)

    def process_data(self): #create thread here
        finished = True
        if finished:
            self.update_gui()


    def update_gui(self):
        #create a custom event object and enter it in the event queue:
        my_evt_obj = MyCustomEvent(self.my_event_type,
self.widget_to_update.GetId() )
 
self.widget_to_update.GetEventHandler().ProcessEvent(my_evt_obj)


class B(object):  #Gui class
    def __init__(self):
        frame = wx.Frame(None, -1, "My Window")

        panel = wx.Panel(frame, -1)
        button = wx.Button(panel, -1, "Start Data Processing",
pos=(100, 10))
        button.Bind(wx.EVT_BUTTON, self.onclick)

        self.text_ctrl = wx.TextCtrl(panel, -1, "Hello World",
pos=(100, 50), size=(200, 20))

        self.a = A(self.text_ctrl)
        self.text_ctrl.Bind(self.a.EVT_MY_CUSTOM_EVENT,
self.on_my_custom_event)

        frame.Show()

    def onclick(self, event):
        self.a.process_data()

    def on_my_custom_event(self, event):
        self.text_ctrl.SetValue("Finished Processing Data")

app = wx.PySimpleApp(redirect=False)
b = B()
app.MainLoop()


From jstucklex at attglobal.net  Sun May 25 15:07:09 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 15:07:09 -0400
Subject: php vs python
In-Reply-To: <68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
Message-ID: <1oydnYcMZLpzJaTVnZ2dnUVZ_r-dnZ2d@comcast.com>

Ivan Illarionov wrote:
> Jerry Stuckle wrote:
>> Lie wrote:
>>> On May 22, 12:28 pm, NC <n... at iname.com> wrote:
>>>> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>>>>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
>>>>> Yet, I want learn the guts of it instead of just booting up some
>>>>> wordwank or whatever.
>>>> Here's a simple computation to consider...  WordPress' codebase is
>>>> approximately a megabyte of PHP code and megabyte of JavaScript code.
>>>> Assuming that the average line of that code is 50 characters long, you
>>>> are looking at 20,000 lines of code in PHP and as many in JavaScript.
>>>> Based on the notion that the average developer out there writes 100
>>>> lines a day, either you're in for a two-year project or your product
>>>> is going to have seriously reduced functionality compared to something
>>>> that's been freely available for years.  What's your choice?
>>> Nope, the core functionality of a blogging software could be
>>> replicated in just a few lines of PHP codes, in the range of tens to
>>> hundreds of lines. If you're creating your own blogging software, you
>>> wouldn't seriously think you'd recreate all those things such as
>>> pingbacks, commenting system, etc, etc, etc. No, you'd start with some
>>> basic core functionalities: a few simple server side includes only.
>> As he said - it's either a two man-year project or your product is going
>> to have seriously reduced functionality.  It looks like you are opting
>> for the latter.
>>
>> Also, you still need to write the server-side includes.  But they won't
>> do nearly enough for everything WordPress does.
> 
> If the OP wants to learn the guts of the blog or to implement the blog
> from scratch, Python/Django would be a better choice than PHP. The
> reason is that he can reuse and customize existing high quality
> components for all these auth/auth, admin, comments, etc, etc, etc.
> Another reason is that Python and Django encourage very clean design
> while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
> PHP wrapped in spaghetti HTML". 2 man/year in PHP == 2 man/week in
> Python/Django.
>

You can do the same in PHP.  And PHP doesn't create spaghetti code - 
programmers do.  Good programmers write good code in any language.  Poor 
programmers write lousy code - in any language.

And I'd love to see you write WordPress in 2 weeks in Python.  That's 
about 2K LOC.  Can't be done with the same functionality - unless you 
have some 50K lines.

It's going to be very close to the same 2 man years that PHP takes.

> And there are Python/Django blog applications that already do almost
> everything (and maybe more) that WordPress does. http://byteflow.su/
> is one of them (IMHO the most promising).
> 
> Ivan
> 

And there are many CMS's written in PHP which do much more than 
WordPress does.  Drupal, Joomla and Mambo come to mind.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From raxitsheth2000 at gmail.com  Fri May 16 03:16:47 2008
From: raxitsheth2000 at gmail.com (Raxit@MyKavita.com)
Date: Fri, 16 May 2008 00:16:47 -0700 (PDT)
Subject: how to set python hosting !
Message-ID: <ef823a8f-9cb7-4e39-b9ad-e08754eb5ec5@n1g2000prb.googlegroups.com>

Hi,

i do have some basic python know-how. i want to tryout by actually
implementing some python generated dynamic page etc.

i am having websetup which runs with mysql on linux, and pythong is
installed on it.

so is there any ref. from where i can know how to configure my
webserver for python.


-Raxit


From pavlovevidence at gmail.com  Thu May 29 02:55:46 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 28 May 2008 23:55:46 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
References: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>
Message-ID: <5d7a0971-5b7a-4b52-bd49-484238331c9a@m44g2000hsc.googlegroups.com>

On May 28, 7:41 pm, blaine <frik... at gmail.com> wrote:
> Hey everyone,
>   Just a friendly question about an efficient way to do this.

Friendly advance reminder: in many optimization problems, the
objective function is far more expensive to calculate than the
optimizing procedure.  Your time is usually better spent optimizing
the objective function, or tuning the optimizer.

But what they hey.

> I have
> a graph with nodes and edges (networkx is am amazing library, check it
> out!).  I also have a lookup table with weights of each edge.  So:
>
> weights[(edge1, edge2)] = .12
> weights[(edge2, edge5)] = .53
> weights[(edge5, edge1)] = 1.23
> weights[(edge3, edge2)] = -2.34
> etc.
>
> I would like to take this weight table and subject it to evolutionary
> mutations.  So given a probability p (mutation rate), mutate edge
> weights by some random value.   So in effect, if p is .25, choose 25%
> random edges, and mutate them some amount.  So:
> 1.  Whats a good way to get the keys? I'm using a loop with
> random.choice() at the moment.

That's probably the best way.

You might be able to squeeze a little more speed out of it by using a
partial random shuffle as opposed to removing the item from the list.
This will minimize the amount of copying.  Here's an example (without
error checking):

def partial_random_shuffle(lst,nshuffled):
    for i in xrange(nshuffled):
        j = random.randrange(i,len(lst))
        t = lst[i]
        lst[i] = lst[j]
        lst[j] = t

The first nshuffled items of lst upon return will be the selected
items.  Note: This might also be slower than removing items.  It
should scale better, though.


> 2.  Any comments on how to get a 'fair' mutation on an existing edge
> value?

random.normalvariate is usually a good choice for selecting random
real-valued increments.

val = random.normalvariate(val,sigma)

where sigma, the standard deviation, is the amount


> I currently am doing something like this, which seems like it leaves
> something to be desired.
>
> import random
> weights = generateweights() # generates table like the one above
> p = 0.25
> v = random.betavariate(2, 10)
> num = int(v*len(weights)) # How many weights should we mutate?
> keys = w.keys()
> for i in xrange(num):
>   val = random.choice(keys) # Choose a single random key
>   w[val] = w[val]*(random.random()*5-1) # Is this a 'good' way to
> 'mutate' the value?

If you don't remove keys[val], there's a chance you'll mutate the same
key twice, which I doubt is what you want.


> This is an evolutionary search, so mutate in this sense relates to a
> genetic algorithm, perhaps a gradient decent?

A gradient descent method is not an evolutionary search and involves
no randomness (unless noise is added to the objective, which is a
possible way to attack a function with unimportant small scale
features, and in that case normalvariate would be the thing used).



Carl Banks


From dullrich at sprynet.com  Sat May 24 07:33:21 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:33:21 -0500
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
	<9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>
	<5196bcc1-e840-456f-ac4d-a3841445362f@y38g2000hsy.googlegroups.com>
Message-ID: <h3vf34lkgtlrlv7u2tdt9as3ha96r76tb9@4ax.com>

On Fri, 23 May 2008 06:40:13 -0700 (PDT), Gandalf <goldnery at gmail.com>
wrote:

>On May 23, 3:29 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>> On May 23, 8:24 am, Gandalf <goldn... at gmail.com> wrote:
>>
>> > I try to reach a specific wx StaticText element's text and to change
>> > it by clicking on a button
>>
>> > now let's say the this is my element:
>>
>> > wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>>
>> > And this is my EVT_BUTTON bind function :
>>
>> > def OnClick(event):
>>
>> > which code shude i enter to change "hello" to "goodbay"?
>>
>> > thanks
>>
>> You're probably looking for SetLabel(). So if you do something like
>> this to instantiate the StaticText:
>>
>> self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
>> style=wx.ALIGN_CENTRE)
>>
>> Then you can change your text by adding this to your OnClick event
>> handler:
>>
>> self.myText.SetLabel("goodbye")
>>
>> Have fun! And remember, there's a great wxPython mailing list too:
>>
>> http://www.wxpython.org/maillist.php
>>
>> Mike
>
>Thanks!

You should also note

docs.wxwidgets.org

(I tend to find that by googling "wxTreeCtrl" or whatever.)
The descriptions of various components there are more 
complete than in the (excellent!) wxPython book - it's
C++ but usually not hard to figure out what the corresponding
wxPython should be.

David C. Ullrich


From buzzard at urubu.freeserve.co.uk  Fri May 23 10:25:39 2008
From: buzzard at urubu.freeserve.co.uk (duncan smith)
Date: Fri, 23 May 2008 15:25:39 +0100
Subject: Misuse of list comprehensions?
In-Reply-To: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
	<48340938$0$10773$426a74cc@news.free.fr>
	<e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
Message-ID: <g16k7o$d6$1@energise.enta.net>

Simon Forman wrote:
> On May 21, 4:36 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Simon Forman a ?crit :
>>
>>
>>
>>> On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
>>>> On May 20, 10:50 am, s0s... at gmail.com wrote:
>>>>> You don't need all those conditionals. A set differs from a list
>>>>> precisely in the fact that each element is unique. And since the
>>>>> function is expecting "s" to be an iterable object, it can be
>>>>> constructed even without a for loop:
>>>>> def compress(s):
>>>>>     return list(set(s))
>>>>> That does the trick.
>>>> Only if order does not need to be maintained.  list(set(s)) will not
>>>> necessarily keep the unique characters in the order they are seen.
>>>> We'll have to check with the OP to see if this is important (I just
>>>> assumed that it was because of the use of list comps).
>>>> -- Paul
>>> If order is important, you can use sorted() instead of list() like so:
>>> def compress(s):
>>>     new = sorted(set(s), key=s.index)
>>>     return return ''.join(new)
>> This won't still preserve the *original* order.
> 
> 
> I don't understand.
> 
> new will contain each unique item in s, sorted in order of the items'
> first occurance in s, right?
> There are other ways to do it (other functions that could be passed to
> sorted() as the key arg) of course, but this seems like a good value
> of "original order", no? :)
> 
> Regards,
> ~S

But, I think, worst case quadratic performance through generating all 
the indices.

Duncan


From Graham.Dumpleton at gmail.com  Thu May  1 19:13:57 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 1 May 2008 16:13:57 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.432.1209678316.12834.python-list@python.org>
Message-ID: <b99f71ed-4279-4412-82d0-b2a8ef6a4a87@j33g2000pri.googlegroups.com>

On May 2, 7:45 am, Christian Heimes <li... at cheimes.de> wrote:
> jmDesktop schrieb:
>
> > I have been to the main python site, but am still confused.  I have
> > been using .net, so it may be obvious how to do this to everyone
> > else.  I am aware there are various frameworks (Django, Pylons, etc.),
> > but I would like to know how to create web pages without these.  If I
> > havemod_pythonor fastcgi on apache, where do I start?  I don't have
> > clue where to begin to create a web page from scratch in python.  I am
> > sure I will want to access database, etc., all the "normal" stuff, I
> > just want to do it myself as opposed to the frameworks, for learning.
>
> I highly recommend WSGI instead ofmod_pythonor (fast)cgi. I've heard
> only bad things aboutmod_pythonover the past years and CGI is totally
> old school.
>
> Check out Python Paste, CherryPy and Django. You can also try the Zope,
> Zope3 and Plone world but Zope is usually for larger and complex
> applications.
>
> Most frameworks come with their own little web server for development, too.

I'd also suggest avoiding coding anything directly to mod_python and
instead base things on WSGI. You can still run it on mod_python with a
suitable adapter, but you can also run it with mod_wsgi, mod_fastcgi,
or using pure Python web servers such as the one in Paste as well.

For a low level nuts and bolts (anti framework) approach I'd suggest
looking at:

  http://dev.pocoo.org/projects/werkzeug/

This gives you all the basic components, but it is really up to you as
to how you put them together, which seems to be what you want to be
able to do.

Graham



From bj_666 at gmx.net  Tue May 20 02:45:20 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:45:20 GMT
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
Message-ID: <69fac0F2uih6aU3@mid.uni-berlin.de>

On Mon, 19 May 2008 15:28:48 -0700, notnorwegian wrote:

> ' '.join([`x  x` for x in range(1, 6)])
> 
> anyone can tell me what im doing wrong?

I doubt that this worked before because that's a syntax error:

In [84]: ' '.join([`x  x` for x in range(1, 6)])
------------------------------------------------------------
   File "<ipython console>", line 1
     ' '.join([`x  x` for x in range(1, 6)])
                   ^
<type 'exceptions.SyntaxError'>: invalid syntax

The backticks are syntactic sugar for the `repr()` function and
``repr(x x)`` isn't legal syntax either.

Ciao,
	Marc 'BlackJack' Rintsch


From tjreedy at udel.edu  Sun May 11 16:38:11 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 16:38:11 -0400
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
	<7xbq3dfj0c.fsf@ruckus.brouhaha.com>
Message-ID: <g07lfh$6qk$1@ger.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7xbq3dfj0c.fsf at ruckus.brouhaha.com...
| philly_bob <b0bm00r3 at gmail.com> writes:
| > algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
| > accs=[]
| > for alg in algs:
| >    thisacc=getattr(alg.accuracy)()
|> # picked this technique on comp.lang.python last month

I don't believe that you actually ran this.
What you should have picked up for the above was something like
globals()[alg].accuracy().  What you probably saw was something
like getattr(ob_with_call_attr, 'callable_name')().
But a list of alg objects instead of names, as Paul suggested,
is almost always better.

| >    accs.append(thisacc)

| I think what you mean is (untested):
|
|     algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
|     accs = sorted(((alg.accuracy(), alg.name()) for alg in algs), 
reverse=True)

Use alg.__name__ instead of alg.name().

|     for i,(alg_acc, alg_name) in enumerate(accs):
|        print '%2d %5s %0.2f'% (i, alg_name, alg_acc)
|
| This assumes a method alg.name() which tells you the name of the 
algorithm.

See above.  In 3.0, function names are also .__name__ instead of 
.func_name,
so one can mix callables in a list and get their definitions names 
uniformly.

| I don't understand how you're converting the string 'AlgA'
| to an algorithm object in your example above.

He was trying to convert name to method with the buggy getattr call.

tjr






From notnorwegian at yahoo.se  Mon May 26 15:02:24 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 12:02:24 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
Message-ID: <34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>

On 26 Maj, 20:57, miller.pau... at gmail.com wrote:
> On May 26, 2:34 pm, notnorweg... at yahoo.se wrote:
>
> I wanted to address some other points I failed to mention in my first
> response.
>
> > so are they fundamentally differently built or is it just a lot of
> > lowlevel operations built on top of each other?
>
> Partly.  A high-level language is essentially one that gives you high-
> level operations, like "apply the function f to each element of the
> sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].
>
> But, it's more than that.  (You use Haskell as your example, but I'll
> use Python because I know it roughly a million percent better than
> Haskell... hehe.)  In Python, you have support from the language to
> treat functions as first-class objects; in C, you explicitly cannot do
> this -- to map an arbitrary function over a sequence, you're
> restricted to accessing the function through a pointer.  On the
> surface, it's the same operation, but that extra level of indirection
> can really bog one's mind down.  Think about how difficult it is for a
> human to interpret the declaration of a function pointer in C, for
> instance.
>
> > haskell is considered a very highlevellanguage but can you do
> > systemsprogramming with it(yes maybe it is very unpractical i dont
> > know but can you)?
> > is lambda calculus a more abstract and efficient way of modeling a
> > computer?
>
> Lambda calculus doesn't model computers.  It models *computation*.
> That is, given a Turing machine, there's a set of functions in the
> lambda calculus, which, when suitably combined, will yield the exact
> same result as the original Turing machine.  That doesn't in any way
> imply that Turing machines work by interpreting lambda calculus.
>
> > how did lispmachines work? was the basic system programmed in LISP?
>
> Yes, the whole kit and kaboodle, all the way down to the microcode was
> programmed in LISP.  In principle, there's no reason we couldn't have
> Haskell machines or Python machines.  It's just that nobody's been
> crazy enough to do it, that I know of. :-)


what is crazy about it?

in the same way programming webapps in C would be annoying because you
have to do a lot of lowlevel tasks it is dumb to program computer ina
highlevellanguage because you dont have direct access to lowlevel
tasks meaning you cant program it very efficiently, ie make it fast?


From mathieu.prevot at ens.fr  Wed May 28 08:11:51 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Wed, 28 May 2008 14:11:51 +0200
Subject: Flash Decoder
In-Reply-To: <0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
	<0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
Message-ID: <3e473cc60805280511o6cf0e639lfdfc2d1ea8902300@mail.gmail.com>

2008/5/28 Ankit <ankitanand1986 at gmail.com>:
> Thanks for replying guys but could you be a little more specific like
> in terms of steps i shd follow to make the decoder and also how is
> ffmpeg/libffmpeg going to help..

You can start by getting familiar with ffmpeg [1] by playing with it
and glance at its libraries (I call them libffmpeg, but they have
their specific name) allow you to do. Keep in mind that libraries
contain frequently used functions and are written so they can be
reused, shared by other/news softwares eg. the one you want. Start by
opening a flash video eg one .flv [2] file from youtube with a first
python script that use the right component(s) of libffmpeg. Python
allows you to use C libraries.

Mathieu

[1] http://ffmpeg.mplayerhq.hu/documentation.html
[2] http://en.wikipedia.org/wiki/Flv


From efurman at admailinc.com  Tue May 13 12:24:24 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 13 May 2008 08:24:24 -0800
Subject: looking for a pdf module
Message-ID: <4829C0B8.9090605@admailinc.com>

Greetings!

I'm hoping to be able to generate pdf files on the fly -- are there any 
python modules out there to do that?

All help appreciated!
--
Ethan
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From ptmcg at austin.rr.com  Wed May 14 23:47:23 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 14 May 2008 20:47:23 -0700 (PDT)
Subject: More fun with PyParsing - almost did it on my own..
References: <bba49cff-a4aa-4fb1-9f1d-1c6436275585@w8g2000prd.googlegroups.com>
Message-ID: <150b049c-2c84-481d-a2fa-6af0b7fc8ce1@f63g2000hsf.googlegroups.com>

On May 14, 6:07?pm, rh0dium <steven.kl... at gmail.com> wrote:
> Hi all,
>
> I almost did my first pyparsing without help but here we go again.
> Let's start with my code. ?The sample data is listed below.
>
> <snip...>
>
> x = ?cells.parseString(data)
> print x[0].asDict()
>
> reveals
> {'pins': ([(['A', 'Input'], {'direction': [('Input', 1)], 'name':
> [('A', 0)]}), (['B', 'Input'], {'direction': [('Input', 1)], 'name':
> [('B', 0)]}), (['Y', 'Output'], {'direction': [('Output', 1)], 'name':
> [('Y', 0)]}), (['VDD', 'Inout', 'Power'], {'direction': [('Inout',
> 1)], 'name': [('VDD', 0)], 'signal': [('Power', 2)]}), (['VSS',
> 'Inout', 'Ground'], {'direction': [('Inout', 1)], 'name': [('VSS',
> 0)], 'signal': [('Ground', 2)]})], {}), 'name': 'AND2X1', 'library':
> 'stdcell130'}
>
> As you can see the Pins is all jacked up and I want is not that. ?I
> want the following
>
> { 'name': 'AND2X1',
> ? 'library':'stdcell130'
> ? 'pins': [ { 'name': 'VSS', 'direction':'Inout', 'signal':'Ground'},
> ? ? ? ? ? ? ?{ 'name': 'VDD', 'direction':'Inout', 'signal':'Power'},
> ? ? ? ? ? ? ?{ 'name': 'A', 'direction':'Input' },
> ? ? ? ? ? ? ?{ 'name': 'B', 'direction':'Input' },
> ? ? ? ? ? ? ?{ 'name': 'Y', 'direction':'Output' } ]
>
> }
>
> What did I do wrong in my code..
>

Not a thing!  asDict() is just not very good at dumping out lists of
subdicts.  Look at the output when you iterate over the cells in x,
and the pins in each cell:

for cell in x:
    print "Name:", cell["name"]
    print "Library:", cell["library"]
    print "Pins:"
    for pin in cell["pins"]:
        print pin.asDict()
    print

Prints:

Name: AND2X1
Library: stdcell130
Pins:
{'direction': 'Input', 'name': 'A'}
{'direction': 'Input', 'name': 'B'}
{'direction': 'Output', 'name': 'Y'}
{'direction': 'Inout', 'name': 'VDD', 'signal': 'Power'}
{'direction': 'Inout', 'name': 'VSS', 'signal': 'Ground'}

Name: AND2X2
Library: stdcell130
Pins:
{'direction': 'Input', 'name': 'A'}
{'direction': 'Input', 'name': 'B'}
{'direction': 'Output', 'name': 'Y'}
{'direction': 'Inout', 'name': 'VDD', 'signal': 'Power'}
{'direction': 'Inout', 'name': 'VSS', 'signal': 'Ground'}


Now, here is a real trick.  Each pin has a unique name, and the
collection of pins can be used to define a dict using the pin names as
dynamically-defined keys.  You've laid all the ground work, all that
is needed is to define your sequence of OneOrMore(guts) as a dict
using the guts names as keys.  The only change needed is to wrap this
OneOrMore(guts) in a pyparsing Dict class - that is, change:

OneOrMore(guts).setResultsName("pins")

to:

Dict(OneOrMore(guts)).setResultsName("pins")

Now, if you iterate over each cell, you can dump out its structure:

for cell in x:
    print cell.dump()
    print

Prints:

['stdcell130', 'AND2X1', [['A', 'Input'], ['B', 'Input'], ['Y',
'Output'], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]]
- library: stdcell130
- name: AND2X1
- pins: [['A', 'Input'], ['B', 'Input'], ['Y', 'Output'], ['VDD',
'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: Input
  - B: Input
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: Output

['stdcell130', 'AND2X2', [['A', 'Input'], ['B', 'Input'], ['Y',
'Output'], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]]
- library: stdcell130
- name: AND2X2
- pins: [['A', 'Input'], ['B', 'Input'], ['Y', 'Output'], ['VDD',
'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: Input
  - B: Input
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: Output

To flesh out all fields of all pins, I suggest you add a default value
for the optional signal entry, and set the results name on the
Optional wrapper, not the quoted string.  Change:

    +
Optional(quotedString.setParseAction(removeQuotes).setResultsName("signal"))

to:

    +
Optional(quotedString.setParseAction(removeQuotes),default="").setResultsName("signal")

Now dump() called on each cell prints out:

['stdcell130', 'AND2X1', [['A', 'Input', ''], ['B', 'Input', ''],
['Y', 'Output', ''], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout',
'Ground']]]
- library: stdcell130
- name: AND2X1
- pins: [['A', 'Input', ''], ['B', 'Input', ''], ['Y', 'Output', ''],
['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: ['Input', '']
    - direction: Input
    - name: A
    - signal:
  - B: ['Input', '']
    - direction: Input
    - name: B
    - signal:
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: ['Output', '']
    - direction: Output
    - name: Y
    - signal:

Power
Input
['stdcell130', 'AND2X2', [['A', 'Input', ''], ['B', 'Input', ''],
['Y', 'Output', ''], ['VDD', 'Inout', 'Power'], ['VSS', 'Inout',
'Ground']]]
- library: stdcell130
- name: AND2X2
- pins: [['A', 'Input', ''], ['B', 'Input', ''], ['Y', 'Output', ''],
['VDD', 'Inout', 'Power'], ['VSS', 'Inout', 'Ground']]
  - A: ['Input', '']
    - direction: Input
    - name: A
    - signal:
  - B: ['Input', '']
    - direction: Input
    - name: B
    - signal:
  - VDD: ['Inout', 'Power']
    - direction: Inout
    - name: VDD
    - signal: Power
  - VSS: ['Inout', 'Ground']
    - direction: Inout
    - name: VSS
    - signal: Ground
  - Y: ['Output', '']
    - direction: Output
    - name: Y
    - signal:

You can use the nested names shown in the dump to access individual
bits of the parsed results:

for cell in x:
    print cell.name
    print cell.pins.keys()
    print cell.pins.VDD.signal
    print cell.pins.A.direction
    print

prints:

AND2X1
['A', 'Y', 'B', 'VDD', 'VSS']
Power
Input

AND2X2
['A', 'Y', 'B', 'VDD', 'VSS']
Power
Input

-- Paul


From ian.g.kelly at gmail.com  Tue May 13 20:18:01 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 13 May 2008 18:18:01 -0600
Subject: list.__len__() or len(list)
In-Reply-To: <g0d9sj$m58$1@registered.motzarella.org>
References: <g0d9sj$m58$1@registered.motzarella.org>
Message-ID: <3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>

On Tue, May 13, 2008 at 5:57 PM, Nikhil <mnikhil at gmail.com> wrote:
>  __len__() is a built-in function of the list object and is updated along
> with the list object elements and will be useful incase the list is very
> huge.
>
>  len() is an external method again, which may require the processing cycles
> again.

The purpose of obj.__len__() is to implement len(obj), which simply
calls it.  So obj.__len__() may be faster, but only marginally.  The
reason to prefer len(obj) is that if you inadvertently pass an object
that does not implement __len__, you get the more appropriate
TypeError rather than an AttributeError.


From gagsl-py2 at yahoo.com.ar  Mon May 12 17:21:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 18:21:15 -0300
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
Message-ID: <op.ua179pnbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 08:09:45 -0300, Gruik <benjamin.fremiot at gmail.com> escribi?:

> On May 12, 12:31?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.frem... at gmail.com> escribi?:
>>
>> > I'm currently working on python embedding with C++. My goal is that
>> > the C++ part handle files writing/reading so that the Python part only
>> > works with buffers.
>>
>> > I succeeded in buffer exchanges. The problem is that some of the files
>> > I read/write are python files so that, before embedding, I imported
>> > them as modules when I needed them.
>>
>> > But now that the Python part only receive buffers, I can't do it
>> > anymore. So I wonder :
>> > - is it possible to import module from a buffer instead of files?
>> > - or is it possible to create a module object from my buffer?
>>
>> Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c
>>
>
> Thanks for your quick answer !
> I think I'll have no problem with that in C++ and I'm going to try it
> right after this message.
>
> But before that 1 question: what if I'm in Python ?
> Following your solution, I did that in Python :
>
>     def load_buffer(buffer) :
>         compiled_buffer = compile(buffer, "module_name", "exec")
>         exec(compiled_buffer)
>
> It works great except that I can't have a module object and that it is
> as if I did "from module import *"
> But I need the module object and not an "import *" behavior.
> Any idea about the way to do that?

Almost - you have to create a new module and exec the code into its namespace:

py> import new
py> foo = new.module("foo", "This is the foo module")
py> exec "def f(): pass" in foo.__dict__
py> foo
<module 'foo' (built-in)>
py> foo.f
<function f at 0x00A3E230>
py> dir(foo)
['__builtins__', '__doc__', '__name__', 'f']

(replace "def f(): pass" with the compiled buffer)

Two differences with a "normal" module:

- it has no __file__ attribute - you may want to add it, with the original filename, or leave it off to show that it's not loaded from a file.
- it does not exist in sys.modules, so other modules cannot import it. If you want to allow that: sys.modules['foo'] = foo (perhaps one should check previously that there is no module named "foo" before replacing it...)

-- 
Gabriel Genellina



From tjreedy at udel.edu  Mon May  5 15:00:43 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 5 May 2008 15:00:43 -0400
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com><b4b3f5-0ng.ln1@pluto.solar-empire.de>
	<9c619edb-303b-439b-ad65-995fb76f70d5@y38g2000hsy.googlegroups.com>
Message-ID: <fvnlgp$hjj$1@ger.gmane.org>


"globalrev" <skanemupp at yahoo.se> wrote in message 
news:9c619edb-303b-439b-ad65-995fb76f70d5 at y38g2000hsy.googlegroups.com...
| sorry i noticed now a little error, i was playing around a lot and saw
| that on the sel-example i had then called foo.hello() instead of
| foo.Hello().

Lesson: whenever one inquires about an 'error', one should cut and paste 
the error traceback along with a relevant snippet of code. 





From dullrich at sprynet.com  Fri May 23 11:01:49 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 23 May 2008 10:01:49 -0500
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
Message-ID: <ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>

On Fri, 23 May 2008 09:13:50 -0400, "John Salerno"
<johnjsal at NOSPAMgmail.com> wrote:

>"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
>message news:4836747b$0$15488$426a74cc at news.free.fr...
>> Ever heard of the "Model/View/Controller" pattern ?
>
>Yes, I have, but I probably don't understand it well enough yet. For 
>example, I don't  really know what is meant by phrases like "build a model", 
>"the view registers itself with the model", "interations are sent to the 
>appropriate controller" -- I may understand them literally, but I get the 
>feeling that the implementation of these ideas are beyond me. 

I doubt that.

I've done things like this. I ended up with just a Model and a View,
no Controller. I assumed that meant I was being Bad - I read once
that that often happens, specifically with GUI programs.

An example, certainly not meant to be definitive, maybe not
even right, probably not "right", but illustrating explicitly
what those terms you claim not to understand might mean
in an implementation:

class Model:
  """Encapsulates an abstract version of the game:
Knows nothing about how the players make moves,
the moves are reported to the model via the 
ProcessMove method. Knows nothing about how the
state of the game is displayed to the players;
that's handled by the view or views. The model
might contain a matrix, where the entry in each
cell is None or a certain Piece object. The model
knows that if a certain Cell contains a King then
it's legal to move that King to this Cell but
not to that Cell - that's part of the rules of the
game, something the View knows nothing about"""

  def __init__(self):
    #set up internal state, for example
    #self.board = [[None]*8]*8
    #and then self.board[0,4] = Queen[WhitePlayer],
    #etc. Whatever...

    self.views = []

    #or just self.view = None if there's
    #no reason for multiple views. When I did
    #something like this once I decided at the
    #end that I should have allowed multiple
    #views even though there was only one to start,
    #because functionality that got added to the view
    #could have been done more cleanly by creating
    #a second view (one view being the display and
    #another being spoken messages)

  def RegisterView(self, view):
    self.views.append(view)
    #or just self.view = view

  def UpdateViews(self):
    for view in self.views:
      view.UpdateDisplay(self)

  #or UpdateView(self): if self.view: self.view.UpdateDisplay(self)

  def ProcessMove(self, move):
    """Model recieves "messages" from View here."""
    #modify internal state depending on the
    #information passed in "move",
    #for example move might say that the Piece in
    #a certain Cell was dragged to another Cell.
    #Here in ProcessMove you decide whether that's
    #a legal move, and if so what effect it should
    #have on the state of the game. Update state, then

    self.UpdateViews()

  #or there could be more than one "Process" method
  #if there are various different sorts of things the
  #players might do

class Square:
  def __init__(self, row, col):
    self.row = row
    self.col = col

#say a move is a drag from one square to another:

class Move:
  def __init__(self, start, end)
    self.start = start
    self.end = end

#wrote that out explicitly just to emphasize that
#the Move object, which the View passes to the
#Model as a message, doesn't know anything
#about the details of the display and also doesn't
#know anything about the rules of the game...

class View:

  def __init__(self, game):
    #set up the wxPython stuff
    self.game = game
    self.game.RegisterView(self)
    Bind(self, VariousEvents, VariousHandlers)

  def VariousHandlers(self, evt)
    #figure out what the players just did based
    #on evt. Maybe a player has just dragged a piece
    #from one square to another. figure out the row
    #and col of the start and end squares from 
    #information in evt.

    #Now tell the Model what just happened:

    self.game.ProcessMove(Move(Square(row1, col1),Square(row2, col2)))

  def UpdateDisplay(self):
    #look at self.game to figure out what pieces
    #go where, then draw them on the screen.
    wx.This
    wx.That

game = Model()
view = View(game)

>I think it's 
>mainly an issue of terminology, so probably I should just read up on MVC.
>
>> The user interface doesn't need to be graphical. There were games and 
>> emails clients and text editors before GUIs existed, you know ?
>
>Of course, but I'm specifically asking about creating a program that has a 
>GUI, and even more specifically it would be wxPython. 
>

David C. Ullrich


From vlastimil.brom at gmail.com  Sat May  3 17:31:38 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Sat, 3 May 2008 23:31:38 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
Message-ID: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>

Hi all,
I'd like to ask about some (probably elementary) things about the proper
usage of sqlite3 in python (2.5.2; win).
- Are there any peculiarities with using curs.executemany(...) vs. multiple
curs.execute(...) ? I read a notice, sqlite3 does internally some
caching, hence both should be similarly fast, but in my case executemany(...)
is quite a bit faster (probably due to the function call overhead?). Are
there maybe some caveats with using  executemany? (the obvious
memory consumption for the intermediate list doesn't seem to matter
much in my application).
Further, I am not quite sure about the standard usage of the cursor
object and also the proper commiting the transactions and closing the
connection.
Should one create a cursor of a connection and call the execute ... methods
of the cursor -
or is it better to call the shortcut execute etc. methods of the
Connection object
directly (as suggested in the docs:
http://docs.python.org/lib/node351.html(or are there specific use
cases for both approaches)?

When the transactions should be
commited? (creating, altering a table, or also selecting the results ?)
There seem to be some implicit handling of the transactions (
http://docs.python.org/lib/sqlite3-Controlling-Transactions.html#sqlite3-Controlling-Transactions);
hence I am not
sure about the standard usage of these methods; the same is true of
connection.close() - or are these calls eventually unnecessary?


To give a bit more info about my use case, my (gui) app displays a set texts
along with some informations on the currently visible text segments.
After starting a gui the texts are read from the source files (also
containing a kind of tags) - simultaneously
the tags are parsed and the corresponding values are stored in sqlite
"in memory" - the column names as well as the corresponding values for given
text parts are extracted dynamically from the source files.
During the whole run of the program the db should be available in order to
retrieve the properties of the given text index.

Below is a part of my code dealing with the populating of the db;, I'm
sorry, it's a not runable pseudocode, however, my present code works
somehow, but I'm quite sure, the implementation isn't really standard, hence
I'd like to hear some comments/suggestions. (I asked some time ago about the
possibility of a parametrised input of the table and column names, but this
seems impossible - therefore I used the string interpolation.)

- the variables are defined in other parts of code before; most of
the names might be self explanatory; self - custom class managing the text
with its properties; text_name - name of the table; index_col_name - a name
of the special db column containing the text index; act_db_columns - list of
the db columns; question_marks - a string "?, ?, ? ..." (synchronized with
the length of act_db_columns); tags_seq - a nested list with
the previously retrieved data for the database.

conn_tags_DB = sqlite3.connect(':memory:')
curs = self.conn_tags_DB.cursor()
curs.execute('CREATE TABLE IF NOT EXISTS "%s" ("%s", UNIQUE("%s"))' %
(self.text_name, index_col_name, index_col_name))
curs.execute(u'INSERT OR REPLACE INTO "%s"("%s") VALUES (?)' %
(self.text_name, index_col_name), (0,))
for new_col in act_db_columns[1:]: # adds the needed columns (except of the
first one: index_col_name)
    curs.execute('ALTER TABLE "%s" ADD "%s" TEXT' % (self.text_name,
new_col))
curs.executemany('INSERT OR REPLACE INTO "%s" VALUES (%s)' %
(self.text_name, question_marks), tags_seq)
self.conn_tags_DB.commit()

Are there maybe any comments or hints on a more elegant/efficient solution?

Now, what's
the usual way to access the database? Is it possible/wise/standard ...
to leave the connection open for the subsequent queries
during the whole run of the app; could even the
cursor eventually be present as a class method, or should it rather be
created repeatedly with each call?  (After populating, the db shouldn't be
modified, but only read.)

Many thanks in advance for your help;
 and apologies for this longer post.
   Greetings,
       Vlasta
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From dfnsonfsduifb at gmx.de  Sun May 25 16:04:42 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sun, 25 May 2008 22:04:42 +0200
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <qbtog5x7p9.ln2@joeserver.homelan.net>

notnorwegian at yahoo.se schrieb:

> ok where does the 1 in the come from?

Conversion to floating point values, which have no precise 
representation for all numbers that have such in the decimal system. 
Read more on http://en.wikipedia.org/wiki/IEEE_754-1985

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From pavlovevidence at gmail.com  Tue May 13 19:52:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 16:52:39 -0700 (PDT)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<fcabf79a-8856-4e9d-89e9-a9b7345fa8ff@59g2000hsb.googlegroups.com>
Message-ID: <1cd579a7-c5a3-49f2-9071-0eef5e966dab@r66g2000hsg.googlegroups.com>

On May 13, 7:46 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 13, 6:09 pm, Eric Anderson <e... at pixelwareinc.com> wrote:
>
> > I mainly work in other languages (mostly Ruby lately) but my text
> > editor (Scribes) is python. With python being everywhere for dynamic
> > scripting I thought I would read the source to learn the language
> > better (I've gone through some basic tutorials but I always prefer to
> > learn from real source).
>
> There is one significant drawback of that....
>
> > So right from the start I see the following:
>
> > from operator import truth
> > if truth(argv):
> >   # blah blah blah
>
> > It is obvious they are testing to see if any command line arguments.
> > But curious for why the function is needed.
>
> It isn't.  The above is terrible code.
>
> 1. You don't even need operator.truth; the built-in bool performs that
> job.  However, this code could have been written before the advent of
> bool, so we'll give it a temporary pass.
> 2. bool in unnecessary in this context.
> 3. Lest someone claim that truth serves to document that you are
> asking for the boolean value of argv (i.e., whether it's not empty),
> it's redundnant since the if statement implies that.

4. sys.argv is never false.  I presume that that the first item of
argv was removed, or argv is a copy of sys.argv without the first
element.  Either way is bad style IMO.  Leave sys.argv alone, and if
you copy it without the first element, copy it to a differently-named
variable.



Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 05:28:13 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 11:28:13 +0200
Subject: Storing objects in relational database
In-Reply-To: <87r6bsvxz7.fsf@gmail.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
	<87r6bsvxz7.fsf@gmail.com>
Message-ID: <483a82ad$0$12589$426a74cc@news.free.fr>

Ville M. Vainio a ?crit :
> "bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:
> 
> 
>> I don't know if you'd label it 'elegant', but as far as I'm
>> concerned, storing serialized objects as blobs in a relational
>> database is mostly non-sense. If I use a relational database, it's
>> because it is a *relational* database. If you want an OODB, then we
>> have the ZODB, Durus and a couple others.
> 
> ... not to forget object-relational mappers like SQLAlchemy, SQLObject...

Which are more IMHO another way to "bridge" RBDMS with the programming 
language than a way to persist objects.


From jcd at sdf.lonestar.org  Wed May 14 06:53:02 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 14 May 2008 06:53:02 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
Message-ID: <1210762382.6465.3.camel@jcd-desktop>

On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
> > You sound like a commercial.
> 
> Get Flaming Thunder for only $19.95!  It slices, it dices!
> 
> > And while programs and libraries written in assembly may be twice as fast
> > as programs and libraries written in C, ...
> 
> It's a myth that they're only twice as fast.  An experienced assembly
> language programmer can usually get out at least a factor of 5 by
> using tricks such as cache-coherence, carry flag tricks, stack
> manipulations, etc.
> 
> > ... they're real hell to maintain.
> 
> That's also a myth.  For example, if C is easy to maintain, why is
> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> the world?  There should be lots of single-asset 8-by-8 shotgun cross
> compilers written in C, if C is easier to maintain.

Not only is it the world's only "single-asset 8-by-8 shotgun cross
compiler," but according to google, it's also the world's only "shotgun
cross compiler" period.  But I guess if you make up your own terminology
you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
single-asset 8x8 shotgun cross compiler, and what makes that of any
value to me?

Cheers,
Cliff




From iman.darabi at gmail.com  Mon May 12 06:37:03 2008
From: iman.darabi at gmail.com (Iman)
Date: Mon, 12 May 2008 03:37:03 -0700 (PDT)
Subject: artificiall, agent, movement
Message-ID: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>

hi
i'm working on some simulation project . i'm going to simulate traffic
of a city.
this simulation has cars , passengers , non-movable objects and
Traffic signals  .
i've made cars as intelligent agent . it has thinking method ,
changing states agents ...
the main problem is i have problem to move my agents in world .
it would be possible to add some method to agent which move  agent in
random  destination .
but i'm trying to find some patterns which is designed  for this
problems .
is there any sample source code in python or links, docs to help me ?
 thanks for your attention .


From wizzardx at gmail.com  Wed May  7 03:04:57 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:04:57 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
Message-ID: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>

Hi Vlasta.

>
> tags_lookups[tag][item_dict[tag]] = tags_lookups[tag].get(item_dict[tag],
> set()) | set([idx])
>
> I thought, whether I am not overestimating myself with respect to the future
> maintaining of the code ... :-)

Here's a suggestion for readability and maintainability:

Make a search() method (possibly on the object storing the text),
which takes variable args.

You'd declare it something like this:

def search(self, **kwargs)

And call it like this:

text.search(line=123, VCC=1, etc)

Probably it would return a list of results (line numbers in the original text?).

Then inside the function build up the sets etc, and comment the logic
liberally so you can understand it later.

This approach should be much more readable the equivalent sqllite + SQL.

>
>  The suggested XML structure is actually almost the one, I use to prepare
> and control the input data before converting it to the one presented in the
> previous mail :-). The main problem is, that I can't seem to make it fully
> valid XML without deforming the structure of the text itself - it can't be
> easily decided,  what CUSTOM_TAG should be in some places - due to the
> overlapping etc.

I was originally going to suggest an overlapped tag format, similar to this:

<b>Bold text<i>Bold and italicised</b>Italicised</i>

But I changed my mind. It's seriously malformed :-) I think that for
now, your format, where your marker values remain 'active' until
changed to another value is the best way way to go. XML's problems
with this sort of thing are a know limitation.

See this link:

http://en.wikipedia.org/wiki/XML#Disadvantages_of_XML

"Expressing overlapping (non-hierarchical) node relationships requires
extra effort"

There is some research into the subject, but no major (ie widely-used)
Python libraries as far as I can tell.

Google for "overlapping markup" and "python overlapping markup" for
more information. Here's one interesting page I found:

http://www.wilmott.ca/python/xmlparser.html#OVERLAPPED

It discusses the issue in detail, and comes with a Python
implementation (I haven't checked it).

David.


From jcd at sdf.lonestar.org  Fri May 23 10:04:52 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 23 May 2008 10:04:52 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
	<5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>
Message-ID: <1211551492.3332.8.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-22 at 15:06 -0400, Dan Upton wrote:
> Who wants to verify that that's correct to that many digits? ;)

Verified.

I checked it against the million digits on piday.org, by putting each
into a string, stripping out spaces and newlines, and doing:

>>> piday[:len(clpy)] == clpy
False
>>> piday[:len(clpy)-1] == clpy[:-1]
True
>>> print piday[len(clpy)-10:len(clpy)+1]
44893330963
>>> print clpy[-10:]
4489333097
>>> 

So the last digit doesn't match, even accounting for rounding, but
that's probably because it was calculated to the bit, not to the digit.




From goldnery at gmail.com  Sat May 10 13:20:00 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 10:20:00 -0700 (PDT)
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
	<4825afc8$0$14350$e4fe514c@news.xs4all.nl>
Message-ID: <8825cf75-8b21-4bca-bba2-97b817b11ebe@a23g2000hsc.googlegroups.com>

Thanks guys I think you miss understood me. i have been mining to use
python to create a none web application.
And i found out that i can ran python scripts by calling them from CMD
or just raning them from windows


From deets at nospam.web.de  Sun May 18 10:53:41 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 16:53:41 +0200
Subject: writing python extensions in assembly
In-Reply-To: <mailman.1237.1210962526.12834.python-list@python.org>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>	<mailman.1229.1210949533.12834.python-list@python.org>	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>	<mailman.1232.1210952591.12834.python-list@python.org>	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>	<mailman.1236.1210959884.12834.python-list@python.org>	<a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
	<mailman.1237.1210962526.12834.python-list@python.org>
Message-ID: <69au85F31e943U1@mid.uni-berlin.de>

> Also, from the gcc manpage, apparently 387 is the default when
> compiling for 32 bit architectures, and using sse instructions is
> default on x86-64 architectures, but you can use -march=(some
> architecture with simd instructions), -msse, -msse2, -msse3, or
> -mfpmath=(one of 387, sse, or sse,387) to get the compiler to use
> them.
> 
> As long as we're talking about compilers and such... anybody want to
> chip in how this works in Python bytecode or what the bytecode
> interpreter does?  Okay, wait, before anybody says that's
> implementation-dependent: does anybody want to chip in what the
> CPython implementation does?  (or any other implementation they're
> familiar with, I guess)

There isn't anything in (C)Python aware of these architecture extensions 
- unless 3rd-party-libs utilize it. The bytecode-interpreter is machine 
and os-independent. So it's above that level anyway. And AFAIK all 
mathematical functionality is the one exposed by the OS math-libs.

Having said that, there are of course libs like NumPy that do take 
advantage of these architectures, through the use of e.g. lib atlas.

Diez


From arnodel at googlemail.com  Fri May  9 02:02:47 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 07:02:47 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
Message-ID: <m2ve1o3th4.fsf@googlemail.com>

"Kam-Hung Soh" <kamhung.soh at gmail.com> writes:

> I avoid creating a temporary variable if it's only used once
> immediately,  so I would have written:
>
> newtlist = ''.join(sorted(list(line)))

Or ''.join(sorted(line))

as sorted() works with any iterable.

-- 
Arnaud


From protected at myshelter.net  Sun May  4 05:39:59 2008
From: protected at myshelter.net (Protected)
Date: Sun, 4 May 2008 10:39:59 +0100
Subject: Please help - Tkinter not doing anything
In-Reply-To: <237aa3894dff4c8976896df85f4d7d23@localhost>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
Message-ID: <3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>

Good thinking. It was indented with spaces, so I replaced them with tabs.
Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
code in two parts (with the second one beginning in that line) and run them
separately, I get no errors, but still nothing happens.

class Application(Frame):
    def say_hi(self):
        print "hi there, everyone!"

    def createWidgets(self):
        self.QUIT = Button(self)
        self.QUIT["text"] = "QUIT"
        self.QUIT["fg"]   = "red"
        self.QUIT["command"] =  self.quit

        self.QUIT.pack({"side": "left"})

        self.hi_there = Button(self)
        self.hi_there["text"] = "Hello",
        self.hi_there["command"] = self.say_hi

        self.hi_there.pack({"side": "left"})

    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()

var root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()

On Sun, May 4, 2008 at 12:33 PM, Q4 <q4 at invalid.com> wrote:

> On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshelter at gmail.com>
> wrote:
> > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > some Tkinter examples, including the one from the library reference,
> > but they don't seem to do anything! Shouldn't there be, like, a
> > dialog?
> >
> > I'm running Windows XP and using IDLE. You can assume my version of
> > Python is the latest.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> If you just copy the code from the python doc the indentation might be
> broken.
> Send the code and I'll take a look at it.
>
> Do you get any errors?
>
> --
> My website:
>  http://www.riddergarn.dk/koder/
>
>
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From gagsl-py2 at yahoo.com.ar  Thu May 15 05:48:25 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 06:48:25 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
Message-ID: <op.ua6v6zkcx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:

> Having a hard time phrasing this in the form
> of a question...
>
> The other day I saw a thread where someone asked
> about overrideable properties and nobody offered
> the advice that properties are Bad. So maybe we've
> got over that. I suppose properties could have
> Bad consequences if a user doesn't know they exist
> and think that a certain property of an object is
> just an ordinary attribute. But that applies to
> almost any aspect of any language.
>
> If a person comes from, say, Object Pascal (Delphi)
> then properties are hard to live without. The
> other day I decided I wanted what OP calls an
> "indexed property" or "array property". Couldn't
> figure out how to make a _property_ behave that way.
> So I read a little bit about descriptors, and a
> few minutes later I had an indexedproperty thing
> that works just like property, except it gives
> an indexed property! This is just too cool.
>
> Why? For example, a Matrix should have a row[n]
> property allowing things like
>
> m.row[0] = m.row[1] + m.row[2]
>
> Ok, you could do _that_ by just making row
> an ordinary list of Row objects. But then
> you'd have to say
>
> m.row[0] = Row([1,2,3])
>
> where I want to be able to say
>
> m.row[0] = [1,2,3]
>
> and have the Row created automatically.
>
> _Also_ with these indexed properties my Matrix
> can have m.row[j] and m.col[k] that look exactly
> the same to a client - we don't want to store a
> list of rows internally and also store the same
> data in a list of columns. Too cool.
>
> Hmm, none of that's a valid excuse for a post here.
> Um, right, here we go: Anyone see problems or
> possible improvements with the implementation
> of indexedproperty below?
>
> """indexed.py: "indexedproperty" works more or less
> like "property" except it gives what in Object Pascal
> would be an "indexed property". See the
> __name__="__main__" section below for a demo
>
> """
>
> class WriteOnlyIP(Exception):
>   def __str__(self):
>     return """
>
> indexed property is write-only
>
> """
>
> class ReadOnlyIP(Exception):
>   def __str__(self):
>     return """
>
> indexed property is read-only
>
> """
>
> class indexedproperty(object):
>   def __init__(self, getitem=None, setitem=None):
>     self.getitem = getitem
>     self.setitem = setitem
>
>   def __get__(self, obj, owner):
>     self.obj = obj
>     return self
>
>   def __getitem__(self, index):
>     if self.getitem:
>       return self.getitem(self.obj, index)
>     else:
>       raise WriteOnlyIP
>
>   def __setitem__(self, index, value):
>     if self.setitem:
>       self.setitem(self.obj, index, value)
>     else:
>       raise ReadOnlyIP
>
>
> if __name__ == "__main__":
>
>   class AClass(object):
>     def __init__(self):
>       self.cells = [[0,0], [0,0]]
>
>     def SetCell(self, (row, col), value):
>       self.cells[row][col] = value
>
>     def GetCell(self, (row, col)):
>       return self.cells[row][col]
>
>     cell = indexedproperty(GetCell, SetCell)
>
>   C = AClass()
>   for row in range(2):
>     for col in range(2):
>       C.cell[row, col] = "row: %s, col: %s" % (row, col)
>
>   for row in range(2):
>     for col in range(2):
>       print C.cell[row, col]
>
>   C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]
>
>   print "After  C.cell[0,0], C.cell[1,1] = C.cell[1,1], C.cell[0,0]:"
>
>   for row in range(2):
>     for col in range(2):
>       print C.cell[row, col]
>



-- 
Gabriel Genellina



From wuwei23 at gmail.com  Tue May 13 22:55:50 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 19:55:50 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
Message-ID: <e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>

On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> "George Sakkis" <george.sak... at gmail.com> wrote in message
> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > you can safely ignore its posts.
>
> How does it generate text?

My guess is by inhaling a lot of intoxicants.


From mail at timgolden.me.uk  Thu May 29 08:00:59 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 13:00:59 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483E9AFB.2040402@timgolden.me.uk>

<<< No Message Collected >>>


From fiacre.patrick at gmail.com  Fri May 23 01:46:16 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:46:16 -0400
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <48365a28$0$11628$607ed4bc@cv.net>

George Maggessy wrote:
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?
> 
> Cheers,
> George


Look at Pylons.


From wizzardx at gmail.com  Tue May  6 11:04:34 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 17:04:34 +0200
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
	<18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
Message-ID: <18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>

>
>  I'll check a few of those results and post to the list if I find something good.
>

It looks like Heapy, part of the Guppy project can do this:

http://guppy-pe.sourceforge.net/#Heapy

David.






David.


From duncan.booth at invalid.invalid  Wed May 14 10:55:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 May 2008 14:55:45 GMT
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <Xns9A9EA1FF16358duncanbooth@127.0.0.1>

hdante <hdante at gmail.com> wrote:

>  How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server). Do you recommend doing so ?

Yes, even those ISP's who do have a news server often seem to make a mess 
of maintaining it. I use news.individual.net which seems to do a pretty 
good job of filtering out spam messages (or at least I see a lot more 
messages complaining about spam messages than spam messages themselves).

Also, it is a lot cheaper than most third party news servers: 10EUR per 
year for 25,000 newsgroups. See http://news.individual.net/

>  What's your prefered news reader ?

XNews, but that's mostly just because I'm used to it. It is getting a bit 
elderly these days and doesn't handle non-ascii encodings very well. It 
does have good scorefile support though.

I use Hamster to actually retrieve news: Hamster runs as a local newsserver 
and pulls feeds from as many different news servers as I want to configure 
presenting them all as though they come from the same server. That means I 
can use my ISPs server as a backup in case I can't access 
news.individual.net for any reason (my previous ISP kept 'accidentally' 
throttling usenet access): Hamster just merges the newsfeeds together and 
is intelligent enough not to fetch a message twice from different servers.

I also recommend Gmane which provides a free news server for most mailing 
lists: mailing lists are a lot more manageable when gatewayed into a news 
server. If you just want to access comp.lang.python I think you'll find the 
mailing list to which it is connected is available for free on Gmane.


From wuwei23 at gmail.com  Wed May 21 22:48:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:48:01 -0700 (PDT)
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
Message-ID: <8242bac2-7bbe-472a-8079-cf249e02e4e8@s21g2000prm.googlegroups.com>

On May 21, 11:31 pm, TheSaint <fc14301... at icqmail.com> wrote:
> Other idea, I'll apreciate somebody to join and put new views on this
> project.

Have you thought about putting the full project somewhere like
http://code.google.com/ ?

Nothing gets comments & criticisms like used code :)



From theller at python.net  Wed May 21 12:33:35 2008
From: theller at python.net (Thomas Heller)
Date: Wed, 21 May 2008 18:33:35 +0200
Subject: [ctypes] convert pointer to string?
In-Reply-To: <mailman.1427.1211384826.12834.python-list@python.org>
References: <mailman.1427.1211384826.12834.python-list@python.org>
Message-ID: <69j16pF33ht4vU1@mid.individual.net>

Neal Becker schrieb:
> In an earlier post, I was interested in passing a pointer to a structure to
> fcntl.ioctl.
> 
> This works:
> 
> c = create_string_buffer (...)
> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
> err = fcntl.ioctl(eos_fd, request, args)
> 
> Now to do the same with ctypes, I have one problem.
> 
> class eos_dl_args_t (Structure):
>     _fields_ = [("length", c_ulong),
>                 ("data", c_void_p)]
> ...
> args = eos_dl_args_t()
> args_p = cast(pointer(args), c_void_ptr).value
> fcntl.ioctl(fd, request, args_p)  <<< May fail here
> 
> That last may fail, because .value creates a long int, and ioctl needs a
> string.
> 
> How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
> 0-terminate string, because the structure may contain '0' values.
> 
ctypes instances support the buffer interface, and you can convert the buffer
contents into a string:

>>> from ctypes import *
>>> c_int(42)
c_long(42)
>>> buffer(c_int(42))
<read-only buffer for 0x00AE7260, size -1, offset 0 at 0x00B06040>
>>> buffer(c_int(42))[:]
'*\x00\x00\x00'
>>>

Thomas


From Lie.1296 at gmail.com  Fri May 30 04:31:03 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 30 May 2008 01:31:03 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>

On May 27, 12:28?pm, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian
> notation, but just for when it's appropriate.

If it was me, I'd use an empty-defined class:

class Fake(object):
    pass

data = 'headinfo=trash;headtrash=info'
Header = Fake()
Header.Str = data
Header.Dict = parse(data)

it saves name if it's important (alternatively, you may also use a
dict or a tuple/list to store the string/dict pair).
But using Fake class just like that is difficult to work with if I
need to "write" to the data (not read only) and synchronizes the data,
in that case, it's easy to extend the Fake Class:

class Fake(object):
    def __init__(self, data):
        self.data = parse(data)

    def toStr(self):
        return str(self.data)
    def fromStr(self, s):
        self.data = parse(s)
    Str = property(toStr, fromStr)

    def toDict(self):
        return self.data
    def fromDict(self, s):
        self.data = s
    Dict = property(toDict, fromDict)

you might go as far as overriding __str__ and __repr__ as appropriate.


From takaurai at gmail.com  Thu May 29 03:26:45 2008
From: takaurai at gmail.com (=?ISO-2022-JP?B?GyRCJD8kKxsoQg==?=)
Date: Thu, 29 May 2008 00:26:45 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
Message-ID: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>

Hi everyone,

 I am developing the console which has the embedded Python interactive
interpreter. So, I want to judge whether current command is complete
or not. Below is good example to solve this problem.

//
// http://effbot.org/pyfaq/how-do-i-tell-incomplete-input-from-invalid-input.htm
//
int testcomplete(char *code)
  /* code should end in \n */
  /* return -1 for error, 0 for incomplete, 1 for complete */
{
  node *n;
  perrdetail e;

  n = PyParser_ParseString(code, &_PyParser_Grammar,
                           Py_file_input, &e);
  if (n == NULL) {
    if (e.error == E_EOF)
      return 0;
    return -1;
  }

  PyNode_Free(n);
  return 1;
}

 But, I think this code has a problem. For example, when argument
'code' has below python command,

if x % 2:
   print "odd"

at the current situation, this function returns COMPLETE!
But, I think that sometimes users want to type "else" statement. So, I
expected to get INCOMPLETE from this function, but I didn't.

How should I do it?


Thanks,
urai


From Lie.1296 at gmail.com  Sun May 25 14:09:28 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 11:09:28 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <a143085e-2ab4-460d-8264-51eea447a59b@l28g2000prd.googlegroups.com>

On May 22, 3:10?am, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

My advice? Mix a bit of both. PHP's pros is it's tight integration
with HTML, it's really easy to slip small, short PHP snippets here and
there. Server side includes for example, is a short one-liner, in
python it would involve reading the original file, finding where and
what to slip, then reading the include file then concatenates the
files then send it to the requester, or you could setup an engine for
you which might take some time and patience.

On the other hand, python is a general-purpose language, and is a
better designed language. Writing the blog back-end in Python is
probably easier than in PHP while writing the interface-related codes
is probably easier in PHP. You might also consider calling python code
from the PHP.


From semanticist at gmail.com  Wed May  7 21:13:27 2008
From: semanticist at gmail.com (Miles)
Date: Wed, 7 May 2008 21:13:27 -0400
Subject: slicing lists
In-Reply-To: <fvtf0p$6pj$1@news.mtu.ru>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
Message-ID: <a49e45f50805071813s3a1f9a14vfde71b87aa07a741@mail.gmail.com>

On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
 <ivan.illarionov at gmail.com> wrote:
 > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
 >
 >  > Is there a way to do:
 >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 >  > x[0,2:6]
 >  >
 >  > That would return:
 >  > [0, 3, 4, 5, 6]
 >
 >  IMHO this notation is confusing.
 >
 >  What's wrong with:
 >  [0]+x[2:6]

 I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:

 my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
 return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)

 This isn't incredibly efficient, but it does what you want (I think):

 from itertools import chain

 class multisliceable(list):
  def __getitem__(self, slices):
    if isinstance(slices, (slice, int, long)):
      return list.__getitem__(self, slices)
    else:
      return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
                          else [list.__getitem__(self, s)] for s in slices]))

 p = open('/etc/passwd')
 q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]

 -Miles


From deets at nospam.web.de  Wed May 21 09:39:10 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 15:39:10 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
Message-ID: <69in0tF33sdj6U2@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

> On May 21, 3:12 pm, "boblat... at googlemail.com"
> <boblat... at googlemail.com> wrote:
>> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>>
>> > Although that solution is pretty, it is not the canonical solution
>> > because it doesn't cover the important case of "if" bodies needing to
>> > access common variables in the enclosing scope.  (This will be easier
>> > in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> > IMHO closer to a canonical solution to this FAQ.
>>
>> Hello everybody,
>>
>> thanks for the various answers. I'm actually pretty puzzled because I
>> expected to see some obvious solution that I just hadn't found before.
>> In general I find Python more elegant and syntactically richer than C
>> (that's where I come from), so I didn't expect the solutions to be a
>> lot more verbose and/or ugly (no offense) than the original idea which
>> would have worked if Python's assignment statement would double as
>> expression, as in C.
>>
>> Thanks again,
>> robert
>>
>> PS: Since I'm testing only three REs, and I only need the match
>> results from one of them, I just re-evaluate that one.
> 
> Is it really a lot to change to have it
> 
> if my_re1.match(line):
>   match = my_re1.match(line)
> elseif my_re2.match(line):
>   match = my_re2.match(line)
> elseif my_re3.match(line):
>   match = my_re3.match(line)
> 
> ?
> 
> That reads clearly to me...

And wastes time. regular expressions can become expensive to match - doing
it twice might be hurtful.

Diez


From roy at panix.com  Fri May  2 00:16:05 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 00:16:05 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <roy-8900EE.00160502052008@70-1-84-166.area1.spcsdns.net>

In article <87abj91j8u.fsf at benfinney.id.au>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> I've never clearly understood why people want to use "#! /usr/bin/env
> python", which is prone to finding a different Python from the one
> installed by the operating system. I'd be interested to see what
> responses are in favour of it, and what the reasoning is.
> 
> One possible reason is that the programmer is attempting to allow for
> systems where Python has been installed, but not from an operating
> system package.

You've got it exactly.

I'm currently using Python to write unit tests as part of a build system.  
Many of our development boxes don't have python installed in /usr/bin (or 
perhaps at all).  And even if they did, we might want to use a different 
version of Python on different branches of the code.

We've got Python built for all our platforms and the binaries stored in our 
source control system.  When you check out a particular branch, you get the 
right version of Python for that branch.  By having the Python scripts 
start with #!/usr/bin/env python, I can select the version of Python I want 
just by changing the environment.

Then, of course, I recently ran across a machine where env was installed in 
/opt/gnu/bin instead of /usr/bin.  Sigh.  Sometimes you just can't win.


From deets at nospam.web.de  Mon May 26 12:32:37 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 18:32:37 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
Message-ID: <6a0722F33j3q5U1@mid.uni-berlin.de>

nik600 wrote:

> Both win and linux if possible i don't have preference for gui. Thanks

Qt4 now contains the WebKit html widget.

Diez


From castironpi at gmail.com  Fri May 16 11:21:07 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:21:07 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com> 
	<9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com>
Message-ID: <f821aecb-68a7-4aab-9cbd-b7fd054364eb@y38g2000hsy.googlegroups.com>

On May 16, 9:41 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > > ?? wrote:
> > > > >     I wonder why below does not work.
>
> > > > > a = object()
> > > > > a.b = 1        # dynamic bind attribute failed...
>
> > > > The implementation of slots depends on that behaviour:
>
> > > >http://docs.python.org/ref/slots.html
>
> > > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > > Can you expand on that?
>
> > > > Peter
>
> > > Spirals are important.
>
> > I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> > - Show quoted text -
>
> Python 3.0a5 (py3k:62932M, May  9 2008
>  win32
> Type "help", "copyright", "credits" or>>> import parser
> >>> import compiler
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: No module named compiler
>
> Does anyone want to model mic-based soundwaves?  My recent project has
> been color progression over time, and talking about compilers.- Hide quoted text -
>
> - Show quoted text -

Can 'compiler' come back in?  I want to build a compiler + exec.


From zethex at hotmail.com  Thu May 22 00:59:47 2008
From: zethex at hotmail.com (Zethex)
Date: Wed, 21 May 2008 21:59:47 -0700 (PDT)
Subject: Bit of List replacing trouble (newbie)
Message-ID: <17397379.post@talk.nabble.com>


At the moment i'm doing a piece of work for school and I'm stuck at the
moment.

I have a list of words, for example:

Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']

I have another list which I need to use to replace certain words, and its in
the form of:

synonyms = [
                  [canine, [dog, puppy, bulldog]],
                  [ road, [street, avenue, court]]
                                                             ]
What the procedure must do is replace dog with canine, and street with road. 
Therefore if a word is in the sentence and appears on the right side of the
list entry, replace it with the left entry.

I can't seem to find a help file with what I'm after.  I'm just wondering if
anyone can help me on the right track on how to start this procedure, maybe
not an answer but just a little help on how to get started as I'm complete
stuck right now.  
-- 
View this message in context: http://www.nabble.com/Bit-of-List-replacing-trouble-%28newbie%29-tp17397379p17397379.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From maxm at mxm.dk  Mon May 26 04:11:22 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 10:11:22 +0200
Subject: php vs python
In-Reply-To: <Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
Message-ID: <g1drbb$4bk$1@ger.gmane.org>

Jerry Stuckle skrev:
> Ivan Illarionov wrote:

> I repeat.  The language has nothing to do with it.  Good programmers 
> write good code.  Lousy programmers write bad code.

That is simply not true!

The languag has a lot to do with what you can do in any given time.

You can write good code in a bad language. But it will take lot more 
time. And so it will not be done.

Your argument, if it was true, would mean that I could just as well 
write a blog in c or even assembler, and still write optimal code.


php is a terrible language and I cringe whenever I have to use it. In 
fact I have turned down many jobs because they were written in php. It 
is simply to frustrating.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From saluk64007 at gmail.com  Sun May  4 20:15:06 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 4 May 2008 17:15:06 -0700
Subject: Are rank noobs tolerated, here?
In-Reply-To: <m31w4hk4bo.fsf@googlemail.com>
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<m31w4hk4bo.fsf@googlemail.com>
Message-ID: <c3f69bf60805041715j79ab7240sb96a580d0e169339@mail.gmail.com>

There is also the python tutor list:

http://mail.python.org/mailman/listinfo/tutor

Which is more geared toward beginners.  Although I am subscribed to both
lists, and they are both matched by the same filter for me so I wont know
the difference...  But there may be people who are not subscribed to both
lists and don't care to listen to beginner discussions.  I wouldn't know.

There is python irc as well: #python on irc.freenode.net.  If you just have
a quick question you may be better off trying there first.
-------------- next part --------------
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From castironpi at gmail.com  Thu May 15 10:06:31 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:06:31 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
	<46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>
	<974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>
Message-ID: <74e109f2-724e-4271-8520-32e62163b843@j22g2000hsf.googlegroups.com>

On May 15, 9:02?am, max <maxwell.newla... at gmail.com> wrote:
> On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > > i currently have locations of the mp3s in question as strings, which
> > > > works for parsing local files, but gives me a "No such file or
> > > > directory" error when it tries to process URLs. ?it seems terribly
> > > > inefficient to download each mp3 just to get at that small tag data,
> > > > and i assume there's a way to do this with file() or open() or
> > > > something, i just can't get it to work.
>
> > > You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> > > with ID3 V1 tags you'll have to download the file anyway because those are
> > > in the last 128 bytes of an MP3 file.
>
> > > Ciao,
> > > ? ? ? ? Marc 'BlackJack' Rintsch
>
> > Just don't import time. ?What would you do with an autolocking timer,
> > such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> > of a lady.
>
> thanks guys. ?i guess i just figured there'd be a way to get at those
> id3 bytes at the end without downloading the whole file. ?if java can
> do this, seems like i should just stick with that implementation, no?- Hide quoted text -
>
> - Show quoted text -

I can post life1 to this: lifeOne, lifeone, lifea perhaps.


From weinhand at unileoben.ac.at  Wed May  7 02:03:48 2008
From: weinhand at unileoben.ac.at (Weinhandl Herbert)
Date: Wed, 07 May 2008 08:03:48 +0200
Subject: DISLIN 9.3 starting issues
In-Reply-To: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
Message-ID: <48214644$0$11610$3b214f66@aconews.univie.ac.at>

adolfo wrote:

> I built the following little program:
> 
> from numpy import *
> from dislin import *
> 
> def main():
>     x = arange (100, typecode=Float32)
>     plot (x, sin (x/5))
>     disfin ()
> 
> main()
> 
> *** Here are the problems:
> 
> 1. The "from Numeric import" statement did not work, I replaced with
> "from numpy import*" and no complains form the interpreter.
> 
> 2. If I enyter "from dislin import *" I get:
>  Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     from dislin import *
> ImportError: No module named dislin
> 
> I checked the environmental variables paths and it all seems Ok:
> c:\dislin
> SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
> \Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
> PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python

the environment variable is PYTHONPATH and i has to contain the directory
where the dislin.pyd module can be found;
you should set environment variable DISLIN too
(see python.inf, which you can find in the dislin-distribution)

depending on your python version (2.4 or 2.5) you need the correct 
dislin-distribution, because dislin is a fortran/c library with
a layer for python access.

and try some examples of the distribution (they are importing only dislin
and math modules).

hth

Herbert


From netizen at gmx.de  Mon May 26 06:30:45 2008
From: netizen at gmx.de (Michael Fesser)
Date: Mon, 26 May 2008 12:30:45 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
Message-ID: <et3l3414bkub2f4ra3b67i8ljkumu36lll@4ax.com>

.oO(Ivan Illarionov)

>On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>> Not at all.  I do it every day.
>> 
>> And BTW - yes, I write Python, also.  But I find I can write better,
>> faster code in PHP.
>
>I find I can write better code in Python. Maybe it's just a matter of 
>personal preference?

Exactly.

>> Do you write PHP?
>I did. And I hated it very much.

See, for me it's the other way round. I really hate Python syntax.
I only touch it for scripting Paint Shop Pro or if some third-party
Python script lacks proper documentation and I have to wade through
the sources to find the informations I need.

So where does this leave us? Nowhere. A language is just a tool and a
tool is just as good as the one who uses it. This was said often enough.

If you hate PHP, that's OK, but it doesn't make PHP a bad or even
inferior language.

Micha


From bj_666 at gmx.net  Mon May 19 02:22:08 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 06:22:08 GMT
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <69ckkgF31kls5U1@mid.uni-berlin.de>

On Sun, 18 May 2008 22:11:33 -0700, sapsi wrote:

> I am using HadoopStreaming using a BinaryInputStream. What this
> basically does is send a stream of bytes (  the java type is : private
> byte[] bytes) to my python program.
> 
> I have done a test like this,
> while 1:
> 	x=sys.stdin.read(100)
> 	if x:
> 		print x
> 	else:
> 		break
> 
> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
> 
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
> 
> However i get a 1 before all and a 4 just after \n and before the 6.
> 
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?

If there's extra data in `x` then it was sent to stdin.  Maybe there's
some extra information like string length, Java type information, or
checksums encoded in that data!?

Ciao,
	Marc 'BlackJack' Rintsch


From a.schmolck at gmail.com  Sun May  4 09:00:59 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Sun, 04 May 2008 14:00:59 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
Message-ID: <yfsod7mfcl0.fsf@gmail.com>

Gary Herron <gherron at islandtraining.com> writes:

> But... It's not!  
>
> A simple test shows that.   I've attached a tiny test program that shows this
> extremely clearly.  Please run it and watch it fail.

In [7]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

(I took the liberty to correct your test to actually do what I said, namely
use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
numpy.array(0)``).


'as

p.s. please don't send me copies to on-list replies, at least not without
explicitly mentioning the fact -- I've got better things to do then guessing
whether something was meant to be off-list or not.


From phil at riverbankcomputing.com  Sun May  4 11:04:04 2008
From: phil at riverbankcomputing.com (Phil Thompson)
Date: Sun, 4 May 2008 16:04:04 +0100
Subject: pyqt4: trouble making custom widget appear in mainwindow
In-Reply-To: <fcydnW0p4tOVK4DVnZ2dnUVZ8q7inZ2d@giganews.com>
References: <fcydnW0p4tOVK4DVnZ2dnUVZ8q7inZ2d@giganews.com>
Message-ID: <200805041604.04448.phil@riverbankcomputing.com>

On Sunday 04 May 2008, Lance Gamet wrote:
> Hi,
> about 3 years ago I did a bit of Qt3 and 4 on C++, now I am trying to do
> something in python.
>
> A QMainWindow subclass as my mainwindow. Its basically a frame with no
> widgets of its own.
>
> Several QWidget subclasses each representing a mode of the program, these
> widgets should appear in the mainwindow depending on what part of the
> program is being used.
>
> I have made the main window and a couple of widgets with designer-qt4 and
> generate a Ui_Whatever.py with pyuic4 and subclass that.
>
> My problem is I cant get my widgets to appear in the main window.
>
> My MainWindow.py looks like (imports etc skipped):
>
> class MainWindow(QMainWindow, Ui_MainWindow):
>     def __init___(self):
>         QMainWindow.__init__(self)
>         self.setupUi(self)
>
>     def newTeamWizardMode(self):
>         Widget = QWidget()
>         self.newTeamWizard = CreateNewTeamWizard(Widget)
>         self.newTeamWizard.setGeometry(QRect(0,0,90, 160))
>         self.newTeamWizard.setObjectName("newTeamWizard")
>         self.newTeamWizard.show()
>
> My CreateNewTeamWizard is defined like so:
>
> class CreateNewTeamWizard(QWidget, Ui_CreateNewTeamWizard):
>     def __init___(self, parent = None):
>         QWidget.__init__(self, parent)
>         self.setupUi(self)
>
> In my main program i make the main window and try and add the widget like
> this:
>
>     app = Qt.QApplication(sys.argv)
>     mainWindow = MainWindow()
>     app.connect(app, Qt.SIGNAL("lastWindowClosed()"), app, Qt.SLOT("quit
> ()"))
>     mainWindow.newTeamWizardMode()
>     mainWindow.show()
>
> One thing i tried was changing the CreateNewTeamWizard in
> MainWindow.newTeamWizardMode to CreateNewTeamWizard(Widget, self) to
> provide the main window as the parent but I get the following error:
>
>     self.newTeamWizard = CreateNewTeamWizard(Widget, self)
> TypeError: argument 2 of QWidget() has an invalid type
>
> I have looked for examples, but everything I have found is a bit too
> simple. Creating a single window or widget, displaying it as the programs
> main window and exiting when the window is closed.
>
> I havent found anything to tell me how to make a widget appear in a
> mainwindow how I want.
>
> Any tips?

I think QMainWindow.setCentralWidget() is what you are looking for.

> If someone can point me to a nice open source program that uses pyqt4
> that might help.

The eric4 IDE probably covers most things you'll ever need.

Phil


From upton at virginia.edu  Thu May 29 18:02:53 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 18:02:53 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <20080529175745.b3e7a579.darcy@druid.net>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<20080529175745.b3e7a579.darcy@druid.net>
Message-ID: <5504f9ac0805291502h2813e004k2e32bf820b190364@mail.gmail.com>

On Thu, May 29, 2008 at 5:57 PM, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?
>

Yeah, but if you look past the "FT is better than Python" propaganda,
there's some interesting discussion of language design.


From skanemupp at yahoo.se  Fri May 30 17:08:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 30 May 2008 14:08:35 -0700 (PDT)
Subject: SMS sending and receiving from website?
Message-ID: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>

can i send and receive messages from a website using python?

how would that work with costs? would the mobileowner pay both ways?


From george.sakkis at gmail.com  Tue May 20 23:36:07 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 20 May 2008 20:36:07 -0700 (PDT)
Subject: namespaces and eval
References: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>
	<m24p8y7yjf.fsf@googlemail.com>
Message-ID: <ebfbb557-62ca-462e-83a6-064563653834@p25g2000hsf.googlegroups.com>

On May 16, 5:02?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> dave.g1... at gmail.com writes:
> > Sorry for the repost, didnt' quite finish
>
> > Suppose I have a function in module X that calls eval e.g,
>
> > X.py
> > _______
> > Def foo(bar):
> > ? ? ? ? Eval(bar)
> > _______
>
> > Now eval will be called using the default eval(bar,globals(),locals())
> > and globals will pull in anything in module X.
>
> > Now I have module Y that calls bar like so
> > Y.py
> > ________
> > from x import *
> > def biz():
> > ? ? ? ? print "Im a silly example!"
> > Foo("biz()")
> > _______
>
> > Python will complain that it cannot find biz because it's not the X
> > module.
>
> > My question - is there any way to a) get a listing of active namespaes
> > search ALL active namespaces for a particular variable
>
> sys.modules gives you all the live modules.
>
> > b) get the namespace of the caller withing passing it in (here, Y)
>
> sys._getframe(1).f_globals (resp. sys._getframe(1).f_locals) gives you
> the caller's globals (resp. locals).
>
> > c) do anything else to get biz without passing
> > foo("biz()",locals(),globals()) or hacking biz into the __builtin__
> > namespace(don't know if it's even possible, but it defeats the
> > purpose of what I'm trying to do) ?
>
> Functions in Python are objects like any other, and can be passed as
> parameters. ?I.e:
>
> x.py
> ----------
> def foo(bar):
> ? ? bar()
>
>
>
>
>
> >>> from x import foo
> >>> def biz(): print "Boo!"
> >>> foo(biz)
> Boo!
>
> > I realize this is here for a reason, but I'm working on something
> > that's kind of a hack already
>
> > Thanks
> > dave
>
> > More gratuitous context. Long story I'm trying to write a hack for a
> > concise way of adding arbitrary methods to objects for JPA/JQuery like
> > chaning eg.
>
> > def foo(self):
> > ? ? print "foo"
> > ? ? return self;
>
> > wrap(x).foo().foo().foo().foo() etc....
>
> What about a composition function instead? I.e.
>
> compose(foo, foo, foo, foo)(x)
>
> Here's one that I made earlier:http://www.marooned.org.uk/~arno/python/compose.html

Neat, although the order is counter-intuitive; the callables should
better be called in the same order they are given in compose(). Here's
yet another take on the composition syntax:

DONE = object()

class Chainable(object):
    def __init__(self, val):
        self.val = val
    def __or__(self, func):
        if func is DONE:
            return self.val
        self.val = func(self.val)
        return self

# Test
def double(x): return 2*x
def square(x): return x**2
def succ(x): return x+1

>>> print Composable(2) | float | succ | square | double | DONE
18.0

Admittedly 'DONE' is ugly but it's necessary to denote that the piping
ends and the final value (rather than the Composable wrapper) should
be returned. The OP's wrap class suffers from the same problem but it
masks it by overriding __getattr__ in an old-style class. If the class
is changed to new-style, it becomes more obvious that
wrap(x).foo().foo().foo().foo() returns the wrap object, not x.

George


From mail at timgolden.me.uk  Wed May 14 11:29:32 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 14 May 2008 16:29:32 +0100
Subject: Rename field in Access DB
In-Reply-To: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
Message-ID: <482B055C.5050604@timgolden.me.uk>

Iain King wrote:
> I'm manipulating an MS Access db via ADODB with win32com.client.  I
> want to rename a field within a table, but I don't know how to.  I
> assume there is a line of SQL which will do it, but nothing I've tried
> (from searching) has worked.
> Basic code:
> 
> import win32com.client
> connection = win32com.client.Dispatch(r'ADODB.Connection')
> DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> connection.Open(DSN)
> connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> doesn't work
> connection.Close()

<code>
import os, sys
from win32com.client.gencache import EnsureDispatch as Dispatch

DATABASE_FILEPATH = r"c:\temp\test.mdb"
CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
  DATABASE_FILEPATH

if os.path.exists (DATABASE_FILEPATH):
   os.remove (DATABASE_FILEPATH)

adox = Dispatch ("ADOX.Catalog")
adox.Create (CONNECTION_STRING)
adox = None

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
  db.Execute ('CREATE TABLE dtest (id INT, data INT)')
  db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')

  try:
    db.Execute ('SELECT id, newdata FROM dtest')
  except:
    print "FAILED as expected"
  else:
    print "SUCCEEDED unexpectedly"

  try:
    db.Execute ('SELECT id, data FROM dtest')
  except:
    print "FAILED unexpectedly"
  else:
    print "SUCCEEDED as expected"

  adox = Dispatch ("ADOX.Catalog")
  adox.ActiveConnection = db
  adox.Tables ("dtest").Columns ("data").Name = "newdata"
  adox.Tables.Refresh ()
finally:
  db.Close ()

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
  
  try:
    db.Execute ('SELECT id, data FROM dtest')
  except:
    print "FAILED as expected"
  else:
    print "SUCCEEDED unexpectedly"

  try:
    db.Execute ('SELECT id, newdata FROM dtest')
  except:
    print "FAILED unexpectedly"
  else:
    print "SUCCEEDED as expected"

finally:
   db.Close ()

</code>

TJG


From daveparker at flamingthunder.com  Wed May 21 17:29:26 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 14:29:26 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
Message-ID: <6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>

On May 21, 3:17?pm, "Chris Mellon" <arka... at gmail.com> wrote:

> If you're going to use every post and question about Python as an
> opportunity to pimp your own pet language you're going irritate even
> more people than you have already.

Actually, I've only posted on 2 threads that were questions about
Python -- this one, and the one about for-loops where the looping
variable wasn't needed.  I apologize if that irritates you.  But maybe
some Python users will be interested in Flaming Thunder if only to
check the accuracy of the results that they're getting from Python,
like I did on this thread.  I think most people will agree that having
two independent programs confirm a result is a good thing.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May  7 03:59:06 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 07 May 2008 09:59:06 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <4821613f$0$4286$426a74cc@news.free.fr>

jmDesktop a ?crit :
(snip)

> On the dynamic typing,
> isn't that the same sort of thing that lots of scripting languages
> do?

This is not restricted to scripting languages - that is, unless you'd 
call Smalltalk, Erlang or common lisp "scripting languages".

Also and FWIW, static typing in C is mostly here to help the compiler 
optimizing, and it's very common to use void pointers and typecast to 
get some genericity (cf the sort() function in C stdlib). And you have 
the same pattern in Java with "generic" containers storing only "object" 
instances, then you have to cast your objects back to the appropriate 
type (which may fails, leading to a runtime error).

>  VBScript doesn't require you to define your variables,

You mean "to declare the type of your variables" ? Neither OCaml nor 
Haskell require this, and they are both statically and strongly typed.

> but I
> don't really want to use it for anything 

Neither do I, but not because of dynamic typing. By experience, dynamic 
typing works just fine for most applications. And by experience too, 
static typing doesn't magically make your code bullet-proof.

> (used to use it a lot in
> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  

Quite a lot of Java stopped making sens to me since I learned some other 
languages. And most of the "OO" (hem) complexity, patterns madness etc 
you'll typically find in Java code only exists because of the language's 
arbitrary restrictions and lack of expressivity.

Learn Python, learn Ruby or (preferably) Smalltalk, learn common lisp or 
(preferably) Scheme, learn OCaml or (preferably) Haskell, learn Erlang, 
and you'll find out that there's much more in programming and languages 
than can be dreamt of in Java's  philosophy !-)


From castironpi at gmail.com  Fri May 16 18:19:49 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:19:49 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>
Message-ID: <e7b9fdb8-5b15-49aa-a6ea-b27a3ee550a2@27g2000hsf.googlegroups.com>

On May 16, 4:29?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
>
>
>
>
>
> > On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > > i extract info from one file and put it into a dictionary.
> > > > i want to save that dictionary for later use, how do i do that?
> > > > might save a list of dictionaries or a list of classobjects too if
> > > > there is any difference.
>
> > > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > > ...
> > > Jay Graves
>
> > pickle.dumps(mg)
> > pickle.load(mg)
>
> > 'dict' object has no attribute 'readline'
> > dumps load(well i dont know but i get no complaint but running load
> > generates that error)
>
> What about *READING THAT FUCKING MANUAL* ?
>
> http://docs.python.org/lib/node316.html
> """
> dump(obj, file[, protocol])
> ? ? Write a pickled representation of obj to the open file object
> file. This is equivalent to Pickler(file, protocol).dump(obj).
>
> ? ? If the protocol parameter is omitted, protocol 0 is used. If
> protocol is specified as a negative value or HIGHEST_PROTOCOL, the
> highest protocol version will be used.
>
> ? ? Changed in version 2.3: Introduced the protocol parameter.
>
> ? ? file must have a write() method that accepts a single string
> argument. It can thus be a file object opened for writing, a StringIO
> object, or any other custom object that meets this interface.
>
> load(file)
> ? ? Read a string from the open file object file and interpret it as a
> pickle data stream, reconstructing and returning the original object
> hierarchy. This is equivalent to Unpickler(file).load().
>
> ? ? file must have two methods, a read() method that takes an integer
> argument, and a readline() method that requires no arguments. Both
> methods should return a string. Thus file can be a file object opened
> for reading, a StringIO object, or any other custom object that meets
> this interface.
>
> ? ? This function automatically determines whether the data stream was
> written in binary mode or not.
> """
>
> Example use:
>
>
>
> >>> d = dict(a=1, b=2)
> >>> f = open("mydict.dat", "w")
> >>> pickle.dump(d, f)
> >>> f.close()
> >>> f = open("mydict.dat")
> >>> d2 = pickle.load(f)
> >>> f.close()
> >>> d2 == d
> True
> >>> d2
> {'a': 1, 'b': 2}
>
> Now : it's not the first time - in a couple days - that you ask a
> question that you wouldn't have asked if you had taken a couple
> minutes doing the tutorial and/or reading the doc. This newsgroup is
> *very* tolerant (in most other places on usenet, you would have get a
> raw RTFM on the first question, and a PLONK on the second), but there
> are still limits, and as far as I'm concerned you're not far from
> them. So do yourself and the world a favour, read this:http://catb.org/~esr/faqs/smart-questions.html
>
> and then this:http://docs.python.org/tut/tut.html
>
> and next time someone points you to a specific module, have mercy and
> *read* the doc before posting.
>
> As far as I'm concerned, I won't anwser any of your questions unless
> it's obvious that you have followed these advices (but then I'll be
> happy to help if I can).- Hide quoted text -
>
> - Show quoted text -

There is 'shelve'.  It's just that you have to re-update each entry
when you modify, so it's just similarity you'd be saving.


From tjreedy at udel.edu  Thu May  8 17:04:35 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 17:04:35 -0400
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
	<op.uas99gjvev04yd@melwxp23><fvu3rf$je4$1@news.xmission.com>
	<op.uatraax1ev04yd@melwxp23>
Message-ID: <fvvpsv$4uf$1@ger.gmane.org>


"Kam-Hung Soh" <kamhung.soh at gmail.com> wrote in message 
news:op.uatraax1ev04yd at melwxp23...
| On Thu, 08 May 2008 15:42:07 +1000, dave <squareswallower at 1ya2hoo3.net>
| wrote:
| Your code is always going to return the same list because every word is 
an
| anagram of itself.
|
| Tip: Create a list for each dictionary key, then add a word to the list 
if
| that word is not in the list.  So:
|
| mapdic('adem') --> ["edam", "made"]

Unless you plan to keep the list in alphabetical order, a set might be 
slightly better.





From bignose+hates-spam at benfinney.id.au  Sat May 24 21:39:20 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:39:20 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
Message-ID: <87iqx39n7b.fsf@benfinney.id.au>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> You still need human testing and QA, the difference is that with a
> good set of unit tests you reduce the number of times code comes
> back from QA before it can be passed and make it more likely that
> the customer will be happy with the first version.

Paradoxically, you also end up writing less code that you would
otherwise.

Behaviour Driven Development insists that you be lazy in satisfying
the tests and implement only the simplest thing that could possibly
work (and refactor code whenever the unit test suite passes). This
results in never writing code into the application that isn't needed
to satisfy some unit test, saving a lot of fruitless coding time.

-- 
 \      "...one of the main causes of the fall of the Roman Empire was |
  `\        that, lacking zero, they had no way to indicate successful |
_o__)               termination of their C programs."  -- Robert Firth |
Ben Finney


From prisoner_at_war at yahoo.com  Mon May 26 05:21:06 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Mon, 26 May 2008 02:21:06 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
Message-ID: <f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>

On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
>
> The differences aren't so fundamental or important: it's not an entirely new language, just some ugly old things are being removed or changed in incompatible ways (at *some* time it was supposed to happen - but could not happen on the 2.x series which has to remain backwards compatible)
> Also, Python 3.0 will be released simultaneously with 2.6, and there will be other 2.x releases. Python 2 won't magically disappear from Earth, I don't think Linux distros will come with Python 3.0 by default anytime soon (perhaps not before 3.1).

But I'd read that Python 3 is very different in many important ways.
I read it right there on the Py3K site!  I can't make sense of how,
why, even what, exactly, but that's not a misimpression on my part, I
certain nonetheless...it's not just cosmetic changes but important
ones pertaining to a sort of "linguistic logic" I gather....

> So learning Python with a book targeted to 2.5 isn't a waste of time - not at all.

Well, I will be learning Python from the excellent materials available
online, to be sure, but a book that I spend money for, well, I have
"higher standards" for it, you know, one of which is that it doesn't
get superseded so soon!

> (This subject has already been discussed several times in this group.)

Oops, sorry!  Just thinking aloud a logical follow-up question....

> --
> Gabriel Genellina



From deets at nospam.web.de  Tue May 13 06:19:35 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 12:19:35 +0200
Subject: array in class
References: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
Message-ID: <68t8avF2uftkbU1@mid.uni-berlin.de>

alefajnie wrote:

> class A:
>    this_is_original_variable_only_for_one_inctance = 0
> 
>    def __init__(self, v):
>    self.this_is_original_variable_only_for_one_inctance = v
> 
> 
> class B:
>   this_is_common_for_all_instances = []
> 
>   def __init__(self, v):
>     self.this_is_common_for_all_instances.append(v)
> 
> 
> ----------------
> now I can create some instances of B, but all of them have the same
> array, why
> 
> if I use append for b1.this_is_common_for_all_instances, the b2, b3
> will have been changed that array.
> (where bi is instance of B)
> but changes on this_is_original_variable_only_for_one_inctance works
> fine
> 
> why it does that?
> and how create array in class - normal array, "private variable"

BOTH are at first class-wide. The difference is that the list is mutable,
and thus you alter the one list, whereas a number is not - and instead you
rebind a new object under the name now in the instance itself.

You need to understand that the way you "declared" the variables above is
NOT the way instance variables work in python. It can serve as neat trick
to initialize variables to common values - but *only* if you really know
the semantics.

Instead, the idiom for creating instance-variables (that you wrongly
called "private") is this:

class Foo(object):
   def __init__(self, some_value):
       self.some_var = some_value

The reason why the above seems to work is that a lookup of a name in python
on an instance is done like this:

if hasattr(self, name):
   return getattr(self, name)
else if hasattr(self.__class__, name):
   return getattr(self.__class__, name)

That is the reason why

class Foo(object):
    bar = 10
 
    def __init__(self):
        print self.bar

sees the 10 - it will first lookup on self, fail, and then lookup on Foo,
and succedd.

However, the assignment is *always* on the instance, or spelled out like
this:

setattr(self, name, value)

Thus 

self.name = 20

will create a new variable named "name" with the object it points to being
20.

There are some minor details here regarding the descriptor protocol and
such, but these aren't important for now.

So - stop "declaring" variables if you want them to be per-instance. Use the
above mentioned idiom of setting them on self inside __init__

Diez


From gagsl-py2 at yahoo.com.ar  Fri May 16 20:04:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 21:04:31 -0300
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <op.ua9uht0ax6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yinzhe at gmail.com>  
escribi?:

> Is there a simple way to get all the instances of one class? I mean
> without any additional change to the class.

Try with gc.get_referrers()

py> import gc
py> class A(object): pass
...
py> a,b,c = A(),A(),A()
py> A
<class __main__.A at 0x00A3F4E0>
py> for item in gc.get_referrers(A): print type(item)
...
<type 'getset_descriptor'>
<type 'getset_descriptor'>
<type 'tuple'>
<class '__main__.A'>
<class '__main__.A'>
<class '__main__.A'>
<type 'dict'>
<type 'dict'>

We need to filter that list, keeping only A's instances:

py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
[<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,  
<__main__.A object at 0x00A40E18>]

-- 
Gabriel Genellina



From mmanns at gmx.net  Mon May 26 17:11:25 2008
From: mmanns at gmx.net (Martin Manns)
Date: Mon, 26 May 2008 23:11:25 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <483a1319$0$34516$742ec2ed@news.sonic.net>
Message-ID: <g1f91t$rvh$1@aioe.org>

On Sun, 25 May 2008 18:46:27 -0700
John Nagle <nagle at animats.com> wrote:

> >>>> func_strings=['x', 'x+1', 'x+2', 'x']
> >>>> funclist = [eval('lambda x:' + func) for func in func_strings]
> 
>    What are you actually trying to do, anyway?  What's the
> application?
> 
>    You probably don't want to use "eval" that way.  If you want
> function objects out, use "compile".

I am writing on an application that I call pyspread
(http://pyspread.sourceforge.net).
It provides a grid (mapped to a numpy.array) into which users can type
in strings that contain python expressions.
Each expression is transformed into a function object in a second
numpy.array of the same size, so that each function can be called by
accessing the respective cell of the grid.

eval seems to work quite fine and provides nice access to globals,
system functions, modules, etc. Therefore, one can do general
programming tasks within the grid without worrying about cell
precedence.

compile returns code objects instead of function objects. I can of
course evaluate these code objects. However, when I store the code
objects, it is an extra operation each time I want to call the
function. So what is the benefit?

More specific: Is there any benefit of calling:

eval(compile(mystring, '', 'eval'))

instead of 

eval(mystring)

?

What are the drawbacks of my approach that I may be missing?
Any suggestions?

Best Regards

Martin


From gagsl-py2 at yahoo.com.ar  Sun May 18 11:05:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 12:05:41 -0300
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <op.ubcuvr1ix6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 10:36:28 -0300, Monica Leko <monica.leko at gmail.com> escribi?:

> On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
>
> Yes.
>
>> is the 10-bit
>> bit-pattern to be stored at an arbitrary bit-position in
>> the file
>
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

If you really need arbitrary bit sequences that aren't synchonized into bytes, I think there is a BitVector o BitArray package somewhere.
But if you mostly have bytes and sparsely a different size, I think the struct module and some gymnastics involving bitwise operations would be enough.

-- 
Gabriel Genellina



From CXDALTON at sentara.com  Fri May  2 16:45:57 2008
From: CXDALTON at sentara.com (CRAIG DALTON)
Date: Fri, 02 May 2008 16:45:57 -0400
Subject: Need help: Compiling Python-Code &In-Reply-To=
Message-ID: <20080502205253.EA6C11E4023@bag.python.org>

Hi, 

I'm looking to append several text files in one director and out put the combined files into another director. I'm new to Python and just can't get it to work. So far I've been able to create a file in the desired directory but it isn't pulling any of the data in the originating directory. Could please look at my code and tell me what I'm doing wrong.

import os,shutil
f=open("c:\\output\\testing1.txt","a+")
for r,d,fi in os.walk("c:\\test"):
    for files in fi:
        if files.endswith(".txt"):                         
            g=open(os.path.join(r+,files))
            shutil.copyfileobj(g,f)
            g.close()
f.close()

Any help would be great.

Thanks, 

Craig Dalton
Business Applications Systems Analyst
Sentara Healthcare Systems
Information Technology
cxdalton at sentara.com




From gherron at islandtraining.com  Wed May 28 12:30:54 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 28 May 2008 09:30:54 -0700
Subject: accessing class attributes
In-Reply-To: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <483D88BE.9020306@islandtraining.com>

eliben wrote:
> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> So, I've defined:
>
> class Game:
>   self.GameState = Enum('running', 'paused', 'gameover')
>   
That can't be what you've got.  But I think I can guess what you meant 
to show here.)
>   def __init__
>    ... etc
>   

Several options:

Define the Enum outside the class:
    GameState = Enum('running', 'paused', 'gameover')
then later
    class Game:
        ...
        if state == GameState.running:
            ...


Or just simply define some values
  RUNNING = 0
  PAUSED = 1
  GAMEOVER = 2
then later:
    class Game:
        ...
        if state == RUNNING:
            ...


Or try this shortcut (for the exact same effect):
  RUNNING, PAUSED, GAMEOVER = range(3)

Gary Herron






> Later, each time I want to assign a variable some state, or check for
> the state, I must do:
>
>   if state == self.GameState.running:
>
> This is somewhat long and tiresome to type, outweighing the benefits
> of this method over simple strings.
>
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?
>
> Thanks in advance
> Eli
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From carsten.haese at gmail.com  Sun May  4 17:37:03 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Sun, 04 May 2008 17:37:03 -0400
Subject: unicode newbie - printing mixed languages to the terminal
In-Reply-To: <mailman.558.1209935553.12834.python-list@python.org>
References: <mailman.558.1209935553.12834.python-list@python.org>
Message-ID: <30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>

David wrote:
> Hi list.
> 
> I've never used unicode in a Python script before, but I need to now.
> I'm not sure where to start. I'm hoping that a kind soul can help me
> out here.
> 
> My current (almost non-existant) knowledge of unicode:
> 
>>From the docs I know about the unicode string type, and how to declare
> string types. What I don't understand yet is what encodings are and
> when you'd want/need to use them. What I'd like is to just be able to
> print out unicode strings in mixed languages, and they'd appear on the
> terminal the same way they get shown in a web browser (when you have
> appropriate fonts installed), without any fuss.
> 
> Here is an example of how I'd like my script to work:
> 
> $ ./test.py
> 
> Random hiragana: <some jp characters>
> Random romaji: kakikukeko
> 
> Is this possible?
> 
>>From my limited knowledge, I *think* I need to do to things:
> 
> 1) In my Python script, run .encode() on my unicode variable before
> printing it out (I assume I need to encode into Japanese)
> 
> Question: How does this work when you have multiple languages in a
> single unicode string? Do you need to separate them into separate
> strings (one per language) and print them separately?
> 
> Or is it the case that you can (unlike a web browser) *only*
> display/print one language at a time? (I really want mixed language -
> English AND Japanese).
> 
> 2) Setup the terminal to display the output. From various online docs
> it looks like I need to set the LANG environment variable to Japanese,
> and then start konsole (or gnome-terminal if that will work better).
> But again, it looks like this limits me to 1 language.
> 
> If what I want to do is very hard, I'll output html instead and view
> it in a web browser. But I'd prefer to use the terminal instead if
> possible :-)

I suggest you read http://www.amk.ca/python/howto/unicode to demystify 
what Unicode is and does, and how to use it in Python.

Printing text from different languages is possible if and only if the 
output device (terminal, in this case) supports a character encoding 
that accommodates all the characters you wish to print. UTF-8 is a 
fairly ubiquitous candidate that fits that criteria, since it 
encompasses Unicode in its entirety (as opposed to latin-1, for example, 
which only includes a very small subset of Unicode).

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From banibrata.dutta at gmail.com  Tue May  6 04:23:08 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 13:53:08 +0530
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
In-Reply-To: <482010d3$0$12566$426a74cc@news.free.fr>
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr>
Message-ID: <3de8e1f70805060123o13cd0c81k2eac1d14f1d3329d@mail.gmail.com>

On 5/6/08, Bruno Desthuilliers
<bruno.42.desthuilliers at websiteburo.invalid> wrote:
> Nick Craig-Wood a ?crit :
> > Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
> >
> > >  I've gone through the list of "language differences" between 2.3 / 2.4
> > >  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
> > >  CPython, and I consider myself still very very newbie. So, unable to
> > >  take a call as to how-important or desirable the newer language
> > >  features are -- so whether to write my app for v2.5 of Python, versus,
> > >  as few others on this list have recommended, i.e. to stick to v2.3 ??
> > >  Are the preformance improvements, and memory footprint / leak fix in
> > >  2.5 enough to justify moving to it ? What all do I stand to lose (or
> > >  gain) by writing on v2.3 ??
> > >
> >
> > If you are writing for 2.3 you are writing for 2.4 and 2.5 also.
> >
> > There are some nice things in 2.4 and 2.5 but nothing you really need
> > IMHO.
> >
>
> There are some nice things in Python but nothing you really need neither -
> could have the same result in C or assembly !-)
>
> <OP>
> Ok, if you're newbie to programming, the new stuff in 2.4 and 2.5 might not
> be that useful to you right now. But the real question is mostly: do you
> have any reason to stick to 2.3 ?
> </OP>

Newbie to Python yes, not to programming. But does that change
anything -- i.e. to impact my decision ?

> > >  I've a constraint due to which I might have to also write parts of my
> > >  app (client side) in Jython (because I want to eventually ship Java --
> > >  yet benefit from the rapid development and clarity of Python). Would
> > >  sticking to v2.3 in such a case be a better idea ? Suggestions with
> > >  reasoning would be very helpful.
> > >
> >
> > Jython seems to be based off python 2.2
> >
>
> It is so far. But Sun recently hired Jython's maintainers, so we may have a
> much more up to date Jython version in a foreseeable future.

Well, I need to start somewhere, and I want that "somewhere" to be a
decent-enough point.  :-)

As such 2.6 & 3.0 are also cooking, but from what I see on the mailing
list, some of the features are a bit controversial. So if I start with
2.5 now, unless there are some break-thru preformance gains, or
annoying defects fixed, I'd stick to it. If I can do something
"well-enough" with 2.5, I'd not refactor for 2.6, for quite some
fore-seeable future.


From benjamin.fremiot at gmail.com  Mon May 12 04:49:22 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 01:49:22 -0700 (PDT)
Subject: Import/Create module from buffer
Message-ID: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>

Hi people,

I'm currently working on python embedding with C++. My goal is that
the C++ part handle files writing/reading so that the Python part only
works with buffers.

I succeeded in buffer exchanges. The problem is that some of the files
I read/write are python files so that, before embedding, I imported
them as modules when I needed them.

But now that the Python part only receive buffers, I can't do it
anymore. So I wonder :
- is it possible to import module from a buffer instead of files?
- or is it possible to create a module object from my buffer?

I looked on the Internet but didn't find anything about that. Does
anyone have an idea?

Thanks
Benjamin


From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 14:57:27 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 13:57:27 -0500
Subject: People still using Tkinter?
In-Reply-To: <4825cd01$0$14982$9b622d9e@news.freenet.de>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
	<mailman.906.1210435115.12834.python-list@python.org>
	<4825cd01$0$14982$9b622d9e@news.freenet.de>
Message-ID: <8E6E31ED-9D5C-4008-86AB-C264ADCF5965@sbcglobal.net>

The only trick it that sometimes it isn't obvious how to make the Tcl/ 
Tk call via Python.

Ken

On May 10, 2008, at 11:27 AM, Martin v. L?wis wrote:

>> I am, but "still" isn't the word, I just started.  Good, *complete*
>> docs seem to be hard to find, but using a combination of the free
>> resources and going back and forth between them seems to work all
>> right so far.
>
> IMO, the trick really is to also have a Tk documentation around.
> If you need to find out what option is supported by what widget,
> there isn't really much point in duplicating that information in
> Tkinter, IMO - the Tk documentation has it all.
>
> Regards,
> Martin
> --
> http://mail.python.org/mailman/listinfo/python-list



From aisaac at american.edu  Fri May 30 16:39:35 2008
From: aisaac at american.edu (Alan G Isaac)
Date: Fri, 30 May 2008 16:39:35 -0400
Subject: should I put old or new style classes in my book?
In-Reply-To: <m2od6ob4mj.fsf@googlemail.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
	<m2od6ob4mj.fsf@googlemail.com>
Message-ID: <3t6dnfCz_cCV-93VnZ2dnUVZ_h7inZ2d@rcn.net>

> Alan Isaac <aisaac at american.edu> writes:
>> I take it from this thread that in Python 3 the following are
>> equivalent:

>>        class Test: pass

>>        class Test(object): pass


Arnaud Delobelle wrote:
> I don't know where it is stated, but how could they *not* be
> equivalent?

The most obvious way would be that the former became an illegal
syntax.  But in Python 3 alpha, it is accepted, so I assume that it
will continue to be?

Cheers,
Alan Isaac


From google at mrabarnett.plus.com  Tue May 20 17:41:48 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 20 May 2008 14:41:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
Message-ID: <94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>

On May 20, 4:33 am, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 14, 7:59 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
> > Would it be valid to say:
>
> > x = "concrete"
>
> > or to say:
>
> > if command (is) set to "quit"
>
> > ??????
>
> I like the idea of:
>
> If command is set to "quit" ...
>
Or just:

If command is "quit" ...

> I've added it to my list of things to think about, and possibly
> implement.



From yves at zioup.com  Fri May  2 11:43:35 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 15:43:35 GMT
Subject: help with list comprehension
In-Reply-To: <dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
Message-ID: <HEGSj.107879$rd2.20591@pd7urf3no>

George Sakkis wrote:

> Another alternative is:
> 
> from operator import itemgetter
> 
> def m3():
>     colours, nums = zip(*map(itemgetter('colour','num'), l))
> 
> It's slower than m1() but faster than m2(); it's also the most
> concise, especially if you extract more than two keys.

Good you guys gave me some ideas, I've made m3() work:

def m3()
   total = [ [e['colour'], e['num'], e['couleur']] for e in l ]
   c,d,e = zip(*total)
   return map(list, [c,d,e])

(I have to transform to lists, I need to transform them later on, so tuples 
won't work).

Unfortunately the timing is inconsistant, the first time I run
python -m timeit 'import listcomp ; listcomp.m1()'

m1 is the fastest. But then if I run the test several times, they all seem 
to be about the same time ; I'll have to try with a large list.

Now here is a question:
Is there any way to change my first line there for the list comp. to return 
a list of lists rather than a list of tuples ?


From frikker at gmail.com  Wed May 28 19:45:07 2008
From: frikker at gmail.com (blaine)
Date: Wed, 28 May 2008 16:45:07 -0700 (PDT)
Subject: FW: php vs python
References: <mailman.1701.1212008396.12834.python-list@python.org>
Message-ID: <1cc9a56b-c1d4-4fad-968b-a87684ccfc12@l64g2000hse.googlegroups.com>

On May 28, 4:47 pm, "Phil Runciman" <ph... at aspexconsulting.co.nz>
wrote:
> -----Original Message-----
> From: Jerry Stuckle [mailto:jstuck... at attglobal.net]
> Sent: Wednesday, 28 May 2008 1:48 p.m.
> To: python-l... at python.org
> Subject: Re: php vs python
>
> Ivan Illarionov wrote:
> > On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>
> >> Greetings, Ivan Illarionov.
> >> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>
> >>>> As I've said before - good programmers can write good code in any
> >>>> language.
> >>> Yes, they can. But it may be harder to do for them in one language
> and
> >>> easier in another.
> >> It's obvious lie. If you have clear mind and you know language you're
> >> using, there are absolutely NOTHING can deny you to write clear code.
> >> Even using forth postfix notation, I have no problem writing good
> code,
> >> it's as easy as writing bad code. And yes, I do see the difference.
>
> > No. Language does matter.
>
> Yes it does matter.
>
> I have programmed in many assembly and higher level languages.
>
> In OldenTimes:
> In Algol 60 I was productive from the start.
> KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
> made it even better).
> IBM 360 Assembly was poorer but not a disaster.
> PL1 was a mess. You could write good code but why bother?
> COBOL was fit for purpose and when combined with Jackson structured
> programming could be used straight away by rooky programmers in business
> systems programming. I am sure it has progressed since ANSI 68.
>
> The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
> if language does not matter?
>
> My 2c worth.

http://www.fukung.net/v/7729/php_vs_python.png
:)


From inhahe at gmail.com  Fri May 16 12:24:23 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:24:23 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
Message-ID: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>


"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:mailman.1232.1210952591.12834.python-list at python.org...
>
> 2. Once the code is functioning, benchmark it and find the
> bottlenecks.  Replace the problem methods with a C extension.  Refactor
> (and check your unit tests again) if needed to break out the problem
> areas into as small a piece as possible.

There's probably only 2 or 3 basic algorithms that will need to have all 
that speed.

>
> 3.  If it is still slow, embed some assembler where it is slowing down.
>

I won't know if the assembler is faster until I embed it, and if I'm going 
to do that I might as well use it.
Although it's true I'd only have to embed it for one system to see (more or 
less).

>
>> For portability, I'd simply write different asm routines for different
>> systems.  How wide a variety of systems I'd support I don't know.  As a 
>> bare
>> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms 
>> of
>> SIMD.
>
> Even on the same processor you may have different assemblers depending
> on the OS.

yeah I don't know much about that,  I was figuring perhaps I could limit the 
assembler parts / methodology to something I could write generically 
enough.. and if all else fails write for the other OS's or only support 
windows.   also I think I should be using SIMD of some sort, and I'm not 
sure but I highly doubt C++ compilers support SIMD.




From python at bdurham.com  Tue May  6 09:11:29 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 09:11:29 -0400
Subject: Module to read input from commandline
Message-ID: <1210079489.22730.1251666281@webmail.messagingengine.com>

James,

Check out the optparse module as well. The optparse module supercedes(?)
the cmd module and offers a lot more functionality.

Malcolm


From gandalf at shopzeus.com  Mon May 19 05:06:05 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 19 May 2008 11:06:05 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
Message-ID: <483142FD.4060700@shopzeus.com>


> It is possible to change the serialization used by Pyro
>
>   http://pyro.sourceforge.net/manual/9-security.html#pickle
>
> to the the 'gnosis' XML Pickler.
>   
As I said earlier, I would not use XML. Just an example - I need to be 
able to transfer image files, word and excel documents. How silly it 
would be to base64encode a binary file, then put it into an XML.

  L



From deets at nospam.web.de  Tue May  6 07:00:14 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 13:00:14 +0200
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
Message-ID: <68as2qF2r15d8U1@mid.uni-berlin.de>

artasis at gmail.com wrote:

> Hi, that is my task:
> I need to create python webserver-like extension(dll) which will run
> php and python scripts as plugins.
> I have no problems with dll creating and run python scripts, but I
> cannot understand how to run php(CLI is not a solution).
> Is there a way to solve this problem? I've thought to implement php to
> HTTPServer-like python module, but as I see it's impossible. Solutions
> with creating intermediate C-based module is allowed, but better
> without them :).
> AFAIK, php5ts.dll is that what I must use but how integrate it to
> python webserver? that is a question

http://www.amazon.com/Extending-Embedding-PHP-Developers-Library/dp/067232704X

Might be of help.

And maybe the roadsend PHP-compiler.

Diez


From rupole at hotmail.com  Fri May 30 00:06:38 2008
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 30 May 2008 00:06:38 -0400
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com><mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
Message-ID: <g1nugf$8vc$1@ger.gmane.org>

Kalibr wrote:
> On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>>
>> You can use the shell COM objects to access media properties
>> as shown by Explorer.
>>
>> import win32com.client
>> sh=win32com.client.Dispatch('Shell.Application')
>>
>> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
>> ns=sh.NameSpace(folder)
>>
>> ## the column index for Artist may vary from folder to folder
>> for c in range(0,255):
>>     colname=ns.GetDetailsOf(None, c)
>>     if colname=='Artists':  ## This shows up as just Artist on XP
>>         for i in ns.Items():
>>             artist=ns.GetDetailsOf(i, c)
>>             if artist:
>>                 print ns.GetDetailsOf(i, 0), artist
>>         break
>>
>>             Roger
>
> I shall give that a go. (is the module you reference this one?
> http://python.net/crew/mhammond/win32/Downloads.html )
> --

That's the one.

       Roger





From arnodel at googlemail.com  Tue May  6 11:29:21 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:29:21 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <m28wyn78oe.fsf@googlemail.com>

jmDesktop <needin4mation at gmail.com> writes:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

You're not missing anything.  An Interface is the Poor Man's Multiple
Inheritance.  But in truth, even without multiple inheritance, Python
wouldn't need java-like interfaces.

-- 
Arnaud


From python at hope.cz  Sat May 17 11:58:38 2008
From: python at hope.cz (Johny)
Date: Sat, 17 May 2008 08:58:38 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<mailman.1235.1210959453.12834.python-list@python.org>
Message-ID: <1badfadf-f47f-4502-a7ec-fafd78eb5104@d1g2000hsg.googlegroups.com>

Thanks for your reply.Is it possible to delete a record by using the
module?
Thanks
L>


From castironpi at gmail.com  Mon May 12 21:12:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:12:06 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
Message-ID: <a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>

On May 12, 7:59?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 6:32?pm, castiro... at gmail.com wrote:
>
> > Can you render some furniture for me... to try to see some human
> > posture to lowest energy levels.
>
> I couldn't find any furniture created using DPGraph, but the math art
> gallery athttp://www.dpgraph.com/math-art.htmlhas a sailboat, an
> F15, Tux (the Linux penguin), a lampshade, and lots of other things
> that will soon be doable in Flaming Thunder.

Mine's been always messing up the color wheel.  Do you see anything
analytic* / theoretically necessary / a priori / physical / physically
induced about that?

*Now that's a word from Philosophy Syntax--- pertaining to inherent
definitions of words, any and all.


From bob at passcal.nmt.edu  Thu May 22 13:32:13 2008
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Thu, 22 May 2008 11:32:13 -0600
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <2008052211321316807-bob@passcalnmtedu>

On 2008-05-20 13:18:08 -0600, Bob Greschke <bob at passcal.nmt.edu> said:

> This MUST have been asked before, but I can't seem to Google the right 
> thing. ?How can I get a list of drives on a Windows box, like ["C:\", 
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
> 
> Thanks!
> 
> Bob

Thanks for the ideas, guys!  It's off to the emacs...




From duncan.booth at invalid.invalid  Fri May  9 08:40:12 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 12:40:12 GMT
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <Xns9A998B05A941Aduncanbooth@127.0.0.1>

Viktor <alefnula at gmail.com> wrote:

> Can somebody give me an explanation what happened here (or point me to
> some docs)?
> 
> Code:
> 
> HMMM = None
> 
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)
>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)
> 
> 
> 
> Output:
> 
> fn: 10404208
> HMMM: 10404208
> wrapper: 10404272
> A.__init__: 10376136
> A.__init__.i: 10404208
> HMMM: 505264624
> 
> 
> 
> Why did HMMM changed his id?!

It didn't: global HMMM refers to None both before and after executing 
the rest of your code. The other HMMM is local to a particular 
invocation of w. Try the same steps interactively (and try printing the 
values not just the ids) and it may be more obvious:

>>> HMMM = None
>>> print 'HMMM:', id(HMMM)
HMMM: 505264624
>>> def w(fn):
    print 'fn:', id(fn)
    HMMM = fn
    print 'HMMM:', id(HMMM)
    def wrapper(*v, **kw):
        fn(*v, **kw)
    wrapper.i = fn
    print 'wrapper:', id(wrapper)
    return wrapper

>>> class A:
    @w
    def __init__(self): pass

    
fn: 18299952
HMMM: 18299952
wrapper: 18300016
>>> print 'HMMM:', id(HMMM), HMMM
HMMM: 505264624 None
>>> 


From grante at visi.com  Mon May 12 10:34:48 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:34:48 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
Message-ID: <bZ-dnf18yc0VyLXVnZ2dnUVZ_hjinZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

>> Maybe my brain works differently, but I find both "dummy" and
>> "unused" are extremely confusing names for loop counters. The loop
>> begins to look like it doesn't iterate at all if its counter is
>> dummy or unused.
>> 
>> If it *counts* it is *used* and it's *not* dummy.
>
> The value is unused by any of the code inside the block. For the
> purposes of that block, it is a dummy value.

The value may be unused, but for me it's the name that matters,
not the value.   The name might be in use by other code, and
the careless choice of a "dummy" name that's _supposed_ to be
unused has broken code precisely becuase the name was being
used (for something else).  Requiring that the user pollute a
namespace with a useless name is a wart.

> That is also regrettably common in Python code. It still
> suffers from being unnecessarily ambiguous, since there are
> *also* plenty of loops using 'i', 'j', etc. where the loop
> counter *is* used.

Perhaps I'm the only one who's ever been stupid enough to
overwrite an index named "i" (that is being used) with another
index named "i" (that isn't being used)...


-- 
Grant Edwards                   grante             Yow! All of life is a blur
                                  at               of Republicans and meat!
                               visi.com            


From wuwei23 at gmail.com  Fri May  9 00:04:39 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 8 May 2008 21:04:39 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
Message-ID: <b8b1a978-5b94-4667-b722-f5502be8270b@q1g2000prf.googlegroups.com>

On May 9, 1:42 pm, yhvh <yhvh2... at googlemail.com> wrote:
> I want to generate a range with variable leading zeros
>
> x = [0010, 0210]
> padding = len(x[1])
>
> for j in range(x[0], x[1]):
>     print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}
>
> This is syntactically incorrect, you can't insert a variable into the
> string format options. Any ideas?

Concatenate the parts of the pattern string first:

pat = '%0' + str(padding) + 'd'


From deets at nospam.web.de  Tue May 13 05:18:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 11:18:17 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
Message-ID: <68t4o0F2vaoncU1@mid.uni-berlin.de>

Dave Parker wrote:

> On May 12, 7:20?pm, castiro... at gmail.com wrote:
>>Yes, I am trying to visualize something.
> 
> If it is related to making furniture comfortable for humans, have you
> considered painting the furniture with thermochromic paint (
> http://en.wikipedia.org/wiki/Thermochromism )?  It changes color in
> response to temperature, which in part is determined by how hard a
> body is pressed against it because close contact tends to trap heat.
> An evenly distributed color might indicated evenly distributed
> pressure.

Don't let yourself be irritated by castironpi - he's the virtual equivalent
of a mumbling mad man in this group. Ignorance serves best as remedy - and
getting a filter to work, as I did (so I only see his postings being
quoted... a huge relief!)

Diez


From marc.messina at sbcglobal.net  Thu May  8 12:17:51 2008
From: marc.messina at sbcglobal.net (delta2)
Date: Thu, 8 May 2008 09:17:51 -0700 (PDT)
Subject: Python Math libraries - How to?
In-Reply-To: <fv655i$idi$1@aioe.org>
References: <c976d662-13c3-44ed-b9bd-67104a0ee63f@m44g2000hsc.googlegroups.com>
	<fv655i$idi$1@aioe.org>
Message-ID: <17127534.post@talk.nabble.com>


I am also using Zelle's book to teach myself programming and Python.  I also
had a problem with " import math ", but the alternative of " from math
import * "  is working for me.  I don't know why one works and the other
doesn't.


Cousin Stanley-3 wrote:
> 
> 
>>
>> Here is the arithmetic program I made that it worked before I added
>> the "import math" line.  
>>
>> #volumen.py
>> # A program to compute the volume and surface area of a sphere
>> import math
>>
>> ....
>> NameError: global name 'pi' is not defined
>> ....
> 
>>>> from math import *
>>>>
>>>> def surface( r ) :
> ...     return 4 * pi * r ** 2
> ...
>>>> def volume( r ) :
> ...     return ( 4. / 3. ) * pi * r ** 3
> ...
>>>> for n in range( 1 , 11 ) :
> ...     s = surface( n )
> ...     v = volume( n )
> ...     print '    %2d .... %9.4f .... %9.4f ' % ( n , s , v )
> ...
> 
> 
> -- 
> Stanley C. Kitching
> Human Being
> Phoenix, Arizona
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

-- 
View this message in context: http://www.nabble.com/Python-Math-libraries---How-to--tp16952032p17127534.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From pupeno at pupeno.com  Sat May 17 13:43:33 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Sat, 17 May 2008 10:43:33 -0700 (PDT)
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<482EF709.3000604@behnel.de>
Message-ID: <8ea36733-c9bb-4193-a309-d14af8f134c9@f63g2000hsf.googlegroups.com>

On May 17, 4:17?pm, Stefan Behnel <stefan... at behnel.de> wrote:
> J. Pablo Fern?ndez wrote:
> > I have an XML file that starts with:
>
> > <vortaro>
> > <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> > <kap>
> > ? <ofc>*</ofc>-<rad>a</rad>
> > </kap>
>
> > out of it, I'd like to extract something like (I'm just showing one
> > structure, any structure as long as all data is there is fine):
>
> > [("ofc", "*"), "-", ("rad", "a")]
>
> ? ? >>> root = etree.fromstring(xml)
> ? ? >>> l = []
> ? ? >>> for el in root.iter(): ? ?# or root.getiterator()
> ? ? ... ? ? l.append((el, el.text))
> ? ? ... ? ? l.append(el.text)
>
> or maybe this is enough:
>
> ? ? list(root.itertext())
>
> Stefan

Hello,

My object doesn't have iter() or itertext(), it only has:
iterancestors, iterchildren, iterdescendants, itersiblings.

Thanks.


From zhalbrecht at gmail.com  Tue May 20 16:05:53 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 13:05:53 -0700 (PDT)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
	<m2lk247vdd.fsf@googlemail.com> <g0uno9$i5i$1@news.lysator.liu.se>
Message-ID: <7e73581b-6e8f-417c-9d34-0608164d2517@w5g2000prd.googlegroups.com>

On May 20, 10:38 am, Thomas Bellman <bell... at lysator.liu.se> wrote:
> Arnaud Delobelle <arno... at googlemail.com> wrote:
> > from collections import defaultdict
> > d = defaultdict(int) # That means the default value will be 0
> > for person in people:
> >     d[person.fav_food] += 1
>
> Ah!  I didn't think of using int as the factory function.  If you
> use this, then I believe the warning I gave about performance
> does not apply; my understanding is that calling built-in functions
> (like the int constructor) is fast.
>
> --
> Thomas Bellman,   Lysator Computer Club,   Link?ping University,  Sweden
> "Beware of bugs in the above code; I have    !  bellman @ lysator.liu.se
>  only proved it correct, not tried it."      !  Make Love -- Nicht Wahr!

Arnaud, that is so badass re: int


From sturlamolden at yahoo.no  Sat May  3 18:05:31 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sat, 3 May 2008 15:05:31 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
	<b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>
Message-ID: <d8e056dd-95bf-4704-9dc0-79310db50e32@a23g2000hsc.googlegroups.com>

On May 3, 10:13 pm, hdante <hda... at gmail.com> wrote:

>  I believe that moving this to third party could be better. What about
> numpy ? Doesn't it already have something similar ?

Yes, Kahan summation makes sence for numpy arrays. But the problem
with this algorithm is optimizing compilers. The programmer will be
forced to use tricks like inline assembly to get around the optimizer.
If not, the optimizer would remove the desired features of the
algorithm. But then we have a serious portability problem.


From martin at marcher.name  Tue May 20 17:44:36 2008
From: martin at marcher.name (Martin Marcher)
Date: Tue, 20 May 2008 23:44:36 +0200
Subject: preserve history in the interactive python
In-Reply-To: <g0v4n8$4dk$1@registered.motzarella.org>
References: <g0v49v$2ab$1@registered.motzarella.org>
	<g0v4n8$4dk$1@registered.motzarella.org>
Message-ID: <5fa6c12e0805201444x55e2660dne2d7973e0724c98e@mail.gmail.com>

Hi,

On Tue, May 20, 2008 at 8:19 PM, Nikhil <mnikhil at gmail.com> wrote:
> Nikhil wrote:
>> the previous interactive shell. Basically, is there anyway that I can
>> preserve the history in the shell?
>
> I figured it out. This below thing works fine for me.
> BTW, I got it from http://docs.python.org/tut/node15.html. A little search

Didn't even think of that, now that I have it: I love you - it's great.

To the one that implemented this: If you ever come to vienna, drop me
a note I'll get you a $FAVORITE_DRINK_HERE

/martin

-- 
http://www.xing.com/profile/Martin_Marcher

You are not free to read this message,
by doing so, you have violated my licence
and are required to urinate publicly. Thank you.


From bignose+hates-spam at benfinney.id.au  Mon May 12 03:40:06 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 17:40:06 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
	<g08pnf$2lbi$1@news.mtu.ru>
Message-ID: <877ie06kdl.fsf@benfinney.id.au>

Ivan Illarionov <ivan.illarionov at gmail.com> writes:

> On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote:
> [...]
> > That is also regrettably common in Python code. It still suffers
> > from being unnecessarily ambiguous, since there are *also* plenty
> > of loops using 'i', 'j', etc. where the loop counter *is* used.
> > 
> > Differentiating these use cases by appropriate naming is, IMO,
> > worth the effort of choosing a meaningful name.
> 
> Even if the counter is not used inside the loop's body it's still in
> control of the whole loop

Not in Python it's not. The values that come out of the iterator
aren't "in control of the loop". The state for the loop is in the
*iterator*, not the values that come out.

Having access to the values that come from the iterator is usually
useful, but regardless of whether one uses them or not, they're *not*
controlling the loop, and it's confusing to imply that they are.

So, when not using the values that come from the controlling iterator,
it's good to make that explicit. If Python supported it, we might
prefer to use no name at all for something that isn't used, but the
'for' syntax doesn't allow that.

In the absence of supporting syntax, the next best thing is to choose
a name that *does* make it explicit that the values will not be used.

-- 
 \         ?All television is educational television. The question is: |
  `\                           what is it teaching?? ?Nicholas Johnson |
_o__)                                                                  |
Ben Finney


From smitty1e at gmail.com  Fri May  2 22:16:57 2008
From: smitty1e at gmail.com (smitty1e)
Date: Fri, 2 May 2008 19:16:57 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
Message-ID: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>

Just a fun exercise to unify some of the major input methods for a
script into a single dictionary.
Here is the output, given a gr.conf file in the same directory with
the contents stated below:

smitty at localhost ~/proj/mddl4/test $ ./inputs.py
{'source_db': '/home/sweet/home.db'}
smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
{'source_db': 'test_env'}
smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
{'source_db': 'test_cli'}


For the file
=========
#!/usr/bin/env python

#Goal: unification of environment variables, command line, and
# configuration file settings.
# The .conf file is the specification.
# Optional environment variables can override.
# Optional command-line inputs trump all.
# Example is a file spec for a source database for an application.
# .conf has a contents like:
#================================
# [CONF]
# source_db=/home/sweet/home.db

#TODO:
# 1. Decide (make an option?) to retain the simple dictionary or build
a
#     class from the options.
# 2. Allow for multiple .conf locations, trying to be cool like
#     xorg.conf

from   ConfigParser import SafeConfigParser
from   optparse     import OptionParser
import os

CONF      = "CONF"         #section in .conf file
CONF_FILE = "gr.conf"      #name of config file
PLACEBO   = "placebo"      #mindless default that we don't want
gconf     = {}             #all your config are belong to here
parser    = OptionParser()
parser.add_option( "-f"    , "--file"
                 , dest    = "source_db"
                 , help    = "source database"
                 , default = PLACEBO           )
(cl_opts, args)  = parser.parse_args()

config    = SafeConfigParser()
config.read(CONF_FILE)
file_conf = dict(config.items(CONF))

for k in file_conf:

       gconf[k]=file_conf[k]

       if os.environ.has_key(k):
               gconf[k] = os.environ[k]

       if cl_opts.__dict__.has_key(k):
              if cl_opts.__dict__[k]!=PLACEBO:
                     gconf[k] = cl_opts.__dict__[k]
print gconf


From Scott.Daniels at Acm.Org  Mon May 12 22:47:28 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 12 May 2008 19:47:28 -0700
Subject: anonymous assignment
In-Reply-To: <f0PVj.262779$pM4.237055@pd7urf1no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
Message-ID: <Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>

Yves Dorfsman wrote:
> ... Sorry this was a typo (again :-), I meant:
> d = time.local()
>   y = d[0]
>   d = d[2]
Then:
     y, d = list(time.localtime())[:4:2]

--Scott David Daniels
Scott.Daniels at Acm.Org


From dulipishi at gmail.com  Thu May 22 11:55:32 2008
From: dulipishi at gmail.com (duli)
Date: Thu, 22 May 2008 08:55:32 -0700 (PDT)
Subject: Books for learning how to write "big" programs
Message-ID: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>

Hi:
I would like recommendations for books (in any language, not
necessarily C++, C, python) which have walkthroughs for developing
a big software project ? So starting from inception, problem
definition, design, coding and final delivery on a single theme
or application.

Most of the code I have written and books that I have read deal with
toy programs and I am looking for something a bit more
comprehensive.  For example, maybe a complete compiler written in C++
for some language, or a complete web server or implementing
.net libraries in some language (just a few examples of the scale of
things I am interested in learning).

Thanks!
Duli.




From daveparker at flamingthunder.com  Wed May 21 15:53:22 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 12:53:22 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
	<7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
	<mailman.1446.1211398194.12834.python-list@python.org>
Message-ID: <7a2dcc0b-001a-433a-ad1d-0eb3f1254350@q24g2000prf.googlegroups.com>

On May 21, 1:29?pm, "Dan Upton" <up... at virginia.edu> wrote:

> ... --somewhat akin to the
> guy who a month or so ago wanted to sneakily teach his high school
> class programming fundamentals by teaching them game programming.

Yep, that's kind of my plan, too.  After I get enough "computer
languagey" stuff running, I'm going to incorporate the 3D graphics
from DPGraph.

> Maybe this should be your selling point, and maybe you should be
> drawing comparisons to programming in Matlab or Mathematica.

That sounds like a good idea.

Personally, the first thing I wanted to get running in Flaming Thunder
was the ability to cross-compile CGI scripts for Linux under Windows,
because some inexpensive web-hosting sites (such as GoDaddy) don't
allow shell access, so I couldn't compile the CGI scripts natively.
Also, the ability to cross-compile programs for the Mac since Macs
often appear in educational settings.

Now that those are up and running and Flaming Thunder is released to
the public, I'm adding features as prioritized by customer requests.
Currently, the highest big things on the list are arrays/matrices and
3D graphics.  Next on the list is improved symbolics.


From castironpi at gmail.com  Fri May 16 10:10:38 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:10:38 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
	<57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com>
Message-ID: <52d91619-d8bf-47cb-8a69-5604f71dc45c@e39g2000hsf.googlegroups.com>

On May 16, 8:35?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
> > 42.desthuilli... at websiteburo.invalid> wrote:
> > > Kay Schluehr a ?crit :
>
> > > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > > >> Hello all,
>
> > > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > > >> It appeared to be the following:
>
> > > >> class A(object):
> > > >> ? ? pass
>
> > > >> print min(1.0, A())
>
> > > >> which is accepted by Python even though the A() object is not numerical in
> > > >> nature.
>
> > > >> The cause of this behavior seems to be the compare operation of the object
> > > >> class.
>
> > > >> Is there a way to disable this behavior in Python (other than deriving a new
> > > >> 'object-like' class that doesn't do comparisons?)
>
> > > > Are you sure you don't want to use a statically typed language that
> > > > captures all type errors just by inspecting your source code?
>
> > > This is not necessarily a static vs dynamic typing problem. The
> > > following code will raise a TypeError for very good reasons:
>
> > > ? ? print 1.0 + A()- Hide quoted text -
>
> > > - Show quoted text -
>
> > I question the real-world examples of coercion, casting, and
> > upcasting. ?C insists that defining by operator, which may or may not
> > relate to system, is the only legal move. ?I doubt operator+ is well-
> > defined on non-ideal structures. ?Rationals are not floats, but system
> > got checked. ?Define concurrency.- Hide quoted text -
>
> > - Show quoted text -
>
> I would be bouncing localcy and remoticy. ?What word's on the bar?- Hide quoted text -
>
> - Show quoted text -

Can you suffixize words?  I have corner, cornercy, lunacy, emphatic,
emphasize, a value of Y, orderings, say, remoticy, & cross.  Come do
graphics.  Anybody speak?

For verbs, I have: say, speak, see, talk, and stack.  Pretty
harmless.  Still here?


From bj_666 at gmx.net  Sun May  4 00:08:34 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 4 May 2008 04:08:34 GMT
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
Message-ID: <684r62F2rmn3gU2@mid.uni-berlin.de>

On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:

> I'm actually curious if there's a way to write a generator function
> (not a generator expression) in C, or what the simplest way to do it
> is... besides link the Python run-time.

The reference implementation of Python is written in C, so obviously there
must be a way to write something like generators in C.

Ciao,
	Marc 'BlackJack' Rintsch


From vbgunz at gmail.com  Wed May 14 12:25:40 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 09:25:40 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>

> > > Instance methods make the most sense. A static method makes sense too
> > > *but* I can see how a class method not only does what a static method
> > > does but how a class method *also* gets the cls reference for free.
>
> > I don't understand the last part - but I certainly agree on the "instance
> > methods make the most sense". But *if* you want a hierarchy
> > of "sensefulness",
>
> > method > classmethod > staticmethod

Sorry I quoted this earlier and meant to respond to it. What I meant
was, might as well use a class method over a static method AND in
doing so, cls is free. I sort of repeated the same thing over and
over. I think my main concern was trying to make sure I could grasp at
least that much.


From arnodel at googlemail.com  Tue May 20 11:17:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 16:17:12 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <m2tzgt6m4n.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>> I posted this code last night in response to another thread, and after I
>> posted it I got to wondering if I had misused the list comprehension. Here's
>> the two examples:
>>
>> Example 1:
>> --------------------
>> def compress(s):
>> ? ? new = []
>>
>> ? ? for c in s:
>> ? ? ? ? if c not in new:
>> ? ? ? ? ? ? new.append(c)
>> ? ? return ''.join(new)
>> ----------------------
>>
>> Example 2:
>> ------------------------
>> def compress(s):
>> ? ? new = []
>> ? ? [new.append(c) for c in s if c not in new]
>> ? ? return ''.join(new)
>> --------------------------
>>
>> In example 1, the intention to make an in-place change is explicit, and it's
>> being used as everyone expects it to be used. In example 2, however, I began
>> to think this might be an abuse of list comprehensions, because I'm not
>> assigning the result to anything (nor am I even using the result in any
>> way).
>>
>> What does everyone think about this? Should list comprehensions be used this
>> way, or should they only be used to actually create a new list that will
>> then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?
>
> def compress(s):
>     seen = set()
>     new = [c for c in s if c not in seen and (seen.add(c) or True)]

<split hairs>
Isn't 

    c not in seen and (seen.add(c) or True)

the same as

    seen.add(c) or c not in seen

?

>     return ''.join(new)
>

(notice I haven't closed the tag!)

-- 
Arnaud


From seymour.morris at gmail.com  Sat May  3 22:27:59 2008
From: seymour.morris at gmail.com (SFM)
Date: Sat, 3 May 2008 19:27:59 -0700 (PDT)
Subject: Help - IDLE Debugger Source Checkbox??
Message-ID: <80a1e892-c154-4a06-a211-936fedbd75be@8g2000hse.googlegroups.com>

I have been learning the IDLE Debugger and was wondering if I was
missing something with the "Source" checkbox setting in the debugger.
As I single-step through my program, I have to uncheck and then
recheck this box in order to see the current line in the file editing
window highlighted.  Is there anyway continually see the current line
being executed in the file editor, without unchecking and rechecking
the source setting in the debugger?
Thanks for any insight on this issue.


From giraffeboy at gmail.com  Wed May 21 13:45:18 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 10:45:18 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
Message-ID: <dfc9be28-4b7f-44bc-958e-b48e63052251@x35g2000hsb.googlegroups.com>

On May 21, 3:23 pm, Paul Boddie <p... at boddie.org.uk> wrote:

> Note that if you have a connection open in your program, especially if
> that connection has already been used to select data, it may be the
> case that you then have to perform a rollback or commit before
> attempting to access newly added data. The reason for this behaviour
> is that the DB-API modules will have begun a transaction on your
> behalf, and while that transaction is open, changes committed in other
> transactions may be unavailable to your own transaction, depending on
> the transaction isolation level.

Thanks for that Paul, seems to have solved the problem perfectly. I
had always just thought querying a database would always give you the
most current data, guess it just goes to show that things are never as
simple as they first appear!



From martin at v.loewis.de  Fri May  2 15:44:20 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 21:44:20 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481b6f14$0$9717$9b622d9e@news.freenet.de>

> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
> 
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
> 
> Is there a portable /dev/null somewhere in the standard library?

The subprocess module should work fine. Pass a pipe to the subprocess,
and read and discard anything from the pipe (e.g. in a separate thread).
If the non-Python code is inprocess, you are out of luck. Some systems
just don't support a null device, so Python can't possibly emulate it.

Regards,
Martin


From duncan.booth at invalid.invalid  Wed May  7 06:09:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 10:09:19 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <Xns9A97716C27069duncanbooth@127.0.0.1>

Martin Sand Christensen <msc at es.aau.dk> wrote:

> Now to the main point. When a generator function is run, it 
immediately
> returns a generator, and it does not run any code inside the 
generator.
> Not until generator.next() is called is any code inside the generator
> executed, giving it traditional lazy evaluation semantics. Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?

You mean you expect the semantics of generators to be that when you 
create them, or every time you call next() they run until they hit yield 
and then (except for the initial run) return the result that was yielded 
the time before? It is easy enough to implement that, but could be a bit 
confusing for the user.

>>> def greedy(fn):
    def greedygenerator(*args, **kw):
	def delayed():
		it = iter(fn(*args, **kw))
		try:
			res = it.next()
		except StopIteration:
			yield None
			return
		yield None
		for value in it:
			yield res
			res = value
		yield res
	it = delayed()
	it.next()
	return it
    return greedygenerator

>>> @greedy
def mygen(n):
	for i in range(n):
		print i
		yield i

		
>>> x = mygen(3)
0
>>> list(x)
1
2
[0, 1, 2]
>>> x = mygen(0)
>>> list(x)
[]
>>> 

Now try:

   for command in getCommandsFromUser():
       print "the result of that command was", execute(command)

where getCommandsFromUser is a greedy generator that reads from stdin, 
and see why generators don't work that way.



From basti.wiesner at gmx.net  Fri May 30 18:39:53 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 00:39:53 +0200
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
	<CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>
	<lcudnS3wCdehid3VnZ2dnUVZ_uednZ2d@supernews.com>
Message-ID: <g1pvnp$8vq$02$1@news.t-online.com>

[ Peter Pearson <ppearson at nowhere.invalid> ]

> On Thu, 29 May 2008 20:27:35 -0500, Larry Bates wrote:
>> abhishek wrote:
>>> Hi group, recently my employer asked me too implement encryption/
>>> decryption for secure data transfer over internet. Problem is that the
>>> client application is written using C# and the webserver where i need
>>> to store the information is developed using python.
>>> 
>>> My situation of dilemma is which cryptographic method suits me best
>>> for this purpose.
>>> 
>>> Help/Suggestions are urgently required

> Data security is a complex and difficult problem, and you are likely
> to fail in the worst possible way: implementing something that is
> weak but that you believe to be strong.  Some advice: (1) Use
> off-the-shelf products like PGP or GPG; don't write your own.

full ack.

> (2) Read Bruce Schneier's Applied Cryptography to get a feeling
> for the dimensions of the problem. 

While this book is most certainly worth reading, I doubt, that it is
necessary to gain in-depth knowledge of cryptography to make use of it in
your code.  

If you transfer data over SSL-connection, you should rely on them being
safe, you don't need to understand the details.  You only need to know,
what SSL can protect against, and what it can't protect against.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From vbgunz at gmail.com  Sat May 10 12:42:27 2008
From: vbgunz at gmail.com (vbgunz)
Date: Sat, 10 May 2008 09:42:27 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
Message-ID: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>

I will pay anyone for a face-to-face tutoring in the Orlando Florida
area. I will pay $20.00 per hour (minimum 2 hours needed). What I need
are lessons in Decorators and Class methods. If I can walk away with
at least 5 lessons taught in both subjects I will be happy to offer an
additional $20.00.

If you are interested in this offer feel free to either reply through
email OR here on this thread. There are no string attached, catches,
etc. I need to learn and if you can teach well, I will be happy to
learn.

Best Regards
Victor B. Gonzalez


From pavlovevidence at gmail.com  Thu May  1 20:53:46 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 17:53:46 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
	<071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>
	<fvdl72$3ep$2@news.mtu.ru>
Message-ID: <2209e61f-2799-4c05-a594-31ee6cc54b7e@d1g2000hsg.googlegroups.com>

On May 1, 7:54 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> No, all I want is to give the OP a useful alternative

Fair enough, I can't argue with that.


Carl Banks



From python at hope.cz  Thu May 15 10:16:08 2008
From: python at hope.cz (Johny)
Date: Thu, 15 May 2008 07:16:08 -0700 (PDT)
Subject: Dbase / foxpro files
Message-ID: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>

Is there a module for reading/modifing db files from Python?
Thanks for help
B.


From deets at nospam.web.de  Fri May 23 12:34:49 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 18:34:49 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>
Message-ID: <69oa1aF33cfteU1@mid.uni-berlin.de>

Jimmy schrieb:
> On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
>> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>
>>
>>
>>> Jimmy schrieb:
>>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>>> Jimmy wrote:
>>>>>> Hi to all
>>>>>> python now has grown to a versatile language that can
>>>>>> accomplish tasks for many different purposes. However,
>>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>>> So I am wondering if python can do some kernel coding that
>>>>>> used to be the private garden of C/C++. For example, can python
>>>>>> intercept the input of keyboard on a system level? someone told me
>>>>>> it's a kernel thing, isn't it?
>>>>> http://wiki.python.org/moin/elmer
>>>> well, straightly speaking, how can I know a key is pressed on a system-
>>>> level if
>>>> using python?
>>> What has that todo with kernel programming? You can use e.g. pygame to
>>> get keystrokes. Or under linux, read (if you are root) the keyboard
>>> input file - I've done that to support several keyboards attached to a
>>> machine.
>>> And the original question: no, python can't be used as kernel
>>> programming language. Amongst other reasons, performance & the GIL
>>> prevent that.
>>> Diez
>> sorry, my aim is not limited to one particular program. Yes, many
>> library can
>> permit you to respond to keyboard event, however, what I want is a
>> universal
>> function. as long as a key is pressed, no matter where, my program can
>> repond.
>>
>> I am quite strange with this topic. But according to my understanding,
>> any event, keyboard event
>> for example, once triggered, will be dilivered by keyboard driver to X
>> system, and then
>> any running program can either choose to respond or ignore. So my
>> question can be translated to:
>> how to make my program respond ?
> 
> maybe I'd better elaborate on my question. Back to my original
> question:
> intercept keyboard event on a system level. If you are writing program
> in
>  emacs, of course, the keyboard inputs are meant for emacs only. What
> I
> want is no matter what program you're running, keyboard events can be
> anyway caught by my program.
> 
> Am I clear with myself? :)

Do you want to intercept the call (prevent that it is passed through to 
e.g. emacs), or are you merely interested in getting it? If the latter, 
you can (as root) access the /dev/input keyboard device and get the 
scan-codes.

The former is more complicated - without research I don't know out of my 
head how to accomplish that. But it must be possible, as e.g. KDE 
observes global key-shortcuts. Most probably a X-server thing.



Diez


From andrew.smith.cpp at gmail.com  Tue May 20 06:15:22 2008
From: andrew.smith.cpp at gmail.com (andrew.smith.cpp at gmail.com)
Date: Tue, 20 May 2008 03:15:22 -0700 (PDT)
Subject: Newbie In Python
Message-ID: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>

I have Heard About "Python" its a OOD Language. i have to Learn it
where from i should start it.
i have python compiler at linux Platform.
anyone can suggest me about it.

Thanks In advance.


From james.harris.1 at googlemail.com  Wed May 21 08:33:56 2008
From: james.harris.1 at googlemail.com (James Harris)
Date: Wed, 21 May 2008 05:33:56 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <d42d33e4-9038-4ba7-92cb-2e44cfc61457@m45g2000hsb.googlegroups.com>

On 19 May, 16:18, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.

Can you access the routers with telnet or do you need to use ssh? I've
written loads of Python to access Cisco routers using a wrapper around
the standard telnetlib. Telnetlib supplies an excellent expect
function which makes this work.

It is telnet, though. If I had to use ssh I would probably add it
under the same wrapper so that higher level code could work unchanged.
There may be a way to route the telnet interractions through openssh
or similar externally but I haven't tried that.


From wizzardx at gmail.com  Sat May 24 08:34:36 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 14:34:36 +0200
Subject: Code correctness, and testing strategies
Message-ID: <18c1e6480805240534k1da68fc8rfbace233f0de6e40@mail.gmail.com>

Hi list.

What strategies do you use to ensure correctness of new code?

Specifically, if you've just written 100 new lines of Python code, then:

1) How do you test the new code?
2) How do you ensure that the code will work correctly in the future?

Short version:

For (1) I thoroughly (manually) test code as I write it, before
checking in to version control.

For (2) I code defensively.

Long version:

For (2), I have a lot of error checks, similar to contracts (post &
pre-conditions, invariants). I've read about Python libs which help
formalize this[1][2], but I don't see a great advantage over using
regular ifs and asserts (and a few disadvantages, like additional
complexity). Simple ifs are good enough for Python built-in libs :-)

[1] PEP 316: http://www.python.org/dev/peps/pep-0316/
[2] An implementation:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/436834

An aside: What is the correct situation in which to use assert
statements in Python? I'd like to use them for enforcing 'contracts'
because they're quick to type, but from the docs:

"Assert statements are a convenient way to insert debugging assertions
into a program:"

So to me it sounds like 'assert' statements are only useful while
debugging, and not when an app is live, where you would also
(especially!) want it to enforce contracts. Also, asserts can be
removed with -O, and you only ever get AssertionError, where
ValueError and the like might be more appropriate.

As for point 1 (how do you test the new code?):

I like the idea of automated unit tests. However, in practice I find
they take a long time to write and test, especially if you want to
have good coverage (not just lines, but also possible logic branches).

So instead, I prefer to thoroughly test new code manually, and only
then check in to version control. I feel that if you are disciplined,
then unit tests are mainly useful for:

1) Maintenance of legacy code
2) More than 1 person working on a project

One recent personal example:

My workstation is a Debian Unstable box. I like to upgrade regularly
and try out new library & app versions. Usually this doesn't cause
major problems. One exception is sqlalchemy. It's API seems to change
every few months, causing warnings and breakage in code which used the
old API. This happened regularly enough that for one project I spent a
day adding unit tests for the ORM-using code, and getting the unit
tests up to 100% coverage. These tests should allow me to quickly
catch and fix all sqlalchemy API breakages in my app in the future.
The breakages also make me want to stop using ORM entirely, but it
would take longer to switch to SQL-only code than to keep the unit
tests up to date :-)

My 'test code thoroughly before checkin' methodology is as follows:

1) Add "raise 'UNTESTED'" lines to the top of every function
2) Run the script
3) Look where the script terminated
4) Add print lines just before the exception to check the variable values
5) Re-run and check that the values have expected values.
6) Remove the print and 'raise "UNTESTED"' lines
7) Add liberal 'raise "UNTESTED"' lines to the body of the function.
8.1) For short funcs, before every line (if it seems necessary)
8.2) For longer funcs, before and after each logic entry/exit point
(blocks, exits, returns, throws, etc):

eg, before:

if A():
    B()
    C()
    D()
E()

after:

raise 'UNTESTED'
if A():
    raise 'UNTESTED'
    B()
    C()
    D()
    raise 'UNTESTED'
raise 'UNTESTED'
E()

8.2.1) Later I add "raise 'UNTESTED'" lines before each line in the
blocks also, if it seems necessary.

9) Repeat steps 2 to 8 until the script stops throwing exceptions
10) Check for 'raise "UNTESTED"' lines still in the script
11) Cause those sections of code to be run also (sometimes I need to
temporarily set vars to impossible values inside the script, since the
logic will never run otherwise)

And here is one of my biggest problem with unit tests. How do you unit
test code which almost never runs? The only easy way I can think of is
for the code to have 'if <some almost impossible condition> or <busy
running test case XYZ> lines'. I know I'm meant to make 'fake' testing
classes which return erroneous values, and then pass these objects to
the code being tested. But this can take a long time and even then
isn't guaranteed to reach all your error-handling code.

The above methodology works well for me. It goes fairly quickly, and
is much faster than writing and testing elaborate unit tests.

So finally, my main questions:

1) Are there any obvious problems with my 'correctness' strategies?

2) Should I (regardless of time it takes initially) still be adding
unit tests for everything? I'd like to hear what XP/agile programming
advocates have to say on the subject.

3) Are there easy and fast ways to do write and test (complete) unit tests?

4) Any other comments?

Thanks for your time.

David.


From bbrown at speakeasy.net  Wed May 28 11:14:28 2008
From: bbrown at speakeasy.net (Robert Brown)
Date: Wed, 28 May 2008 11:14:28 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<hoE_j.50548$7a.47091@bignews1.bellsouth.net>
Message-ID: <m2prr631gr.fsf@roger-vivier.bibliotech.com>


"inhahe" <inhahe at gmail.com> writes:
> I like to think of a language that would combine low-level and high-level 
> features to be used at the programmer's whim.  C--, High Level Assembly, and 
> C++ with in-line assembly are examples, but none of them come as high-level 
> as Python. Other possible examples might be ctypes, numpy, array.array, and 
> I heard a rumor that Python 3.0 might have optional type declarations.   My 
> ideal language would be like a version of C++ (including in-line asm), or 
> C-- with classes, that's compiled, but supports Python abstractions and 
> features wherever possible (including doing away with {}'s and ;'s).

Maybe you should give Common Lisp a try.  It combines the high-level
features you enjoy in Python with features like optional type declarations,
which can be used to create high-performance code.  You will also have fun
playing around with syntactic abstraction (macros) to define very high-level
domain specific languages.


From sturlamolden at yahoo.no  Sun May 25 22:15:18 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 25 May 2008 19:15:18 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4839A607.7070300@behnel.de>
	<mailman.1576.1211741113.12834.python-list@python.org>
Message-ID: <d1e7f23b-f68c-42cf-9d12-66220a095448@m36g2000hse.googlegroups.com>

On May 25, 8:02 pm, Rodrigo Lazo <rlazo.... at gmail.com> wrote:

> what about heapq for sorting?

Heap is the data structure to use for 'fast (nearly) sorted inserts'.
But heapq do not support (as far as I know) deletion of duplicates.
But a custom heap class coud do that of course.



From pistacchio at gmail.com  Tue May 13 09:36:48 2008
From: pistacchio at gmail.com (pistacchio)
Date: Tue, 13 May 2008 06:36:48 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com> 
	<VuTVj.40306$o06.27577@tornado.fastwebnet.it>
	<9af51496-5840-4f53-ae71-0d9c0da6c2f4@34g2000hsh.googlegroups.com>
Message-ID: <598d5d96-4c4a-4f0e-b9f0-a2726ab3e63a@d77g2000hsb.googlegroups.com>

On 12 Mag, 11:11, pistacchio <pistacc... at gmail.com> wrote:
> On 12 Mag, 10:47, Marco Mariani <ma... at sferacarta.com> wrote:
>
> >pistacchiowrote:
> > > On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> > >> On May 12, 5:17 pm,pistacchio<pistacc... at gmail.com> wrote:
>
> > >>> hi to all!
> > >>> can i load a module passing to it, automatically and as default, all
> > >>> the caller's global variables to act as module's global variables?
>
> > Are you positively sure you need this?
>
> > Modifying imported modules is already quite fragile, but this.. it's
> > basically a reversed(import *)
>
> > It's quite messy. Where quite equals to "very"
>
> well, i'm writing a module called pycatrix. within the module i have
> compile / exec statements in a functions that work on global
> variables. ( exec compiledTemplate in globals() ).
>
> now, i don't want to be forced (or force the end user) to import to
> call the module's function with a compulsory "globals()" as argument.

up


From 65563082 at qq.com  Mon May 12 11:03:04 2008
From: 65563082 at qq.com (www.globwholesale.com)
Date: Mon, 12 May 2008 08:03:04 -0700 (PDT)
Subject: Discount, Chanel Prada Coach Women's Sandals, LV D&G Fendi Versace 
	Sunglasses
Message-ID: <1b4c5e62-4633-48e1-91d6-e65ae5b00fc1@q27g2000prf.googlegroups.com>

Discount Coach Sandals, Dior Sandals, Prada  Sandals, Chanel Sandals,
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Wholesale,  LV Sunglasses


From nik600 at gmail.com  Mon May 26 11:36:44 2008
From: nik600 at gmail.com (nik600)
Date: Mon, 26 May 2008 17:36:44 +0200
Subject: integration with browser
In-Reply-To: <69vmlgF35akucU1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
Message-ID: <9469c3170805260836m32e35e70w329259e3a0563b36@mail.gmail.com>

Both win and linux if possible i don't have preference for gui. Thanks

2008/5/26, Diez B. Roggisch <deets at nospam.web.de>:
> nik600 wrote:
>
>> Hi to all
>>
>> i'd like to create a window that integrates a browser control, the
>> browser control must support html, javascript and css.
>>
>> Is possible to include something that uses the same engine of firefox?
>>
>> Thanks to all in advance
>
> What OS, what GUI toolkit?
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From arnodel at googlemail.com  Wed May 14 13:45:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 18:45:11 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
Message-ID: <m21w44bx08.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>> > An instance method works on the instance
>> > A Static method is basically a function nested within a class object
>> > A class method is overkill?
>>
>> If anything, a static method is overkill. See it this way: *if* you for some
>> reason put a method into an enclosing context - isn't it worth having a
>> reference to that?
>
> My feeling exactly; these days I almost always use class methods
> instead of static. I vaguely remember seeing somewhere an example
> where a static method was the only (elegant) solution; neither a class
> method nor a plain function would do. I'll post it if I find it unless
> someone beats me to it.
>
> George

__new__ is a static method!

-- 
Arnaud


From gagsl-py2 at yahoo.com.ar  Mon May 12 02:39:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:39:47 -0300
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<Xns9A90773D0D544duncanbooth@127.0.0.1>
	<4820319a_7@news.bluewin.ch>
	<8f1293e5-26f7-4183-acd4-47fd6eda931a@l42g2000hsc.googlegroups.com>
Message-ID: <op.ua03glt3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 06 May 2008 08:16:55 -0300, <cokofreedom at gmail.com> escribi?:

> I tend to do ", ".join("%s" % e for e in item)
>
> Is there any difference between this and str()?

Use the timeit module to measure performance:

C:\TEMP>python -m timeit "for i in xrange(10000): str(i)"
10 loops, best of 3: 81.8 msec per loop

C:\TEMP>python -m timeit "for i in xrange(10000): '%s' % i"
10 loops, best of 3: 78.5 msec per loop

The %s version consistently wins in my system -2.5.1 on WinXP- for a wide range of inputs.

-- 
Gabriel Genellina



From inhahe at gmail.com  Tue May 27 01:28:38 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 27 May 2008 01:28:38 -0400
Subject: Hungarian Notation
Message-ID: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>

Does anybody know of a list for canonical prefixes to use for hungarian 
notation in Python?  Not that I plan to name all my variables with hungarian 
notation, but just for when it's appropriate.





From kyosohma at gmail.com  Thu May  1 17:31:58 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 14:31:58 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <3832bd90-c219-4bc8-b16b-0c5e0318c83b@f63g2000hsf.googlegroups.com>

On May 1, 4:25?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> I have been to the main python site, but am still confused. ?I have
> been using .net, so it may be obvious how to do this to everyone
> else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these. ?If I
> have mod_python or fastcgi on apache, where do I start? ?I don't have
> clue where to begin to create a web page from scratch in python. ?I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.
>
> Thank you for any help.

The web frameworks make it a lot easier. But you can use the httplib
modules. You should check out the wiki: http://wiki.python.org/moin/WebProgramming

There's also a couple of books on the topic: "Python Web Programming"
by Steve Holden, and "Web Programming in Python" by Thiruvathukal.

Check out the cgi-type stuff especially.

Hope that helps some.

Mike


From mmanns at gmx.net  Sun May 25 19:55:03 2008
From: mmanns at gmx.net (Martin Manns)
Date: Mon, 26 May 2008 01:55:03 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
	<83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>
	<59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>
Message-ID: <g1cu8n$5g4$1@aioe.org>

On Sun, 25 May 2008 14:39:28 -0700 (PDT)
bearophileHUGS at lycos.com wrote:

> This may have some bugs left, but it looks a bit better:
[...]
>         self._hash = hash(self._func.func_code) ^ \
>                      hash(tuple(signature[0]) + tuple(signature[1:3]))
>     def __eq__(self, other):
>         return self._func.func_code == other._func.func_code and \
>                getargspec(self._func) == getargspec(other._func)
>     def __hash__(self):
>         return self._hash
>     def __call__(self, *args, **kwargs):
>         return self._func(*args, **kwargs)
> 
> I haven't put a full hashing of getargspec(self._func) too into the
> __init__() because it may contain too much nested unhashable
> structures, but the __eq__() is able to tell them apart anyway, with
> some collisions.

Looking at a function:

>>> a=lambda x:x
>>> dir(a)
['__call__', '__class__', '__delattr__', '__dict__', '__doc__',
'__get__', '__getattribute__', '__hash__', '__init__', '__module__',
'__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',
'__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults',
'func_dict', 'func_doc', 'func_globals', 'func_name']

Should func_globals and func_name also be taken into account for
__eq__()?

Best Regards

Martin


From kyosohma at gmail.com  Tue May 13 14:56:23 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 11:56:23 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com> 
	<6bb0ca79-1070-4d42-90a9-a1066b152210@d1g2000hsg.googlegroups.com>
Message-ID: <ecf9f449-f019-4b76-8d09-56c17d8dddd7@c58g2000hsc.googlegroups.com>

On May 13, 1:47?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 13, 1:44 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
> > On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>
> > > Does anyone know of any (preferably largish) examples of literate
> > > programs written using Python? ?Alternatively, does anyone know of any
> > > literate programming tools which support Python well? ?(I am aware of
> > > Leo and I've been to literateprogramming.com, but any additional
> > > pointers would be much appreciated!)
>
> > Check out Zope, bittorrent, or Editra. You should just go to
> > SourceForge and do a search for projects done in Python.
>
> Those aren't examples of literate programming AFAIK. ?(Check Wikipedia
> for "literate programming" if you're still confused.)
>
> It occurs to me that one could get pretty close to literate
> programming with Pure Python (if they stick to regular function calls
> and not expect code weaving, which would need a preprocessor). ?A
> fairly simple script could ?parse docstrings and Python source files
> to produce a document from the source. ?In fact, there are tools that
> can do that sort of thing already, but I doubt they output documents
> according to literate programming expectations. ?Don't know of any
> tools specifically for literate programming.
>
> Carl Banks

Sorry...I took the OP's meaning literally...

Mike


From daveparker at flamingthunder.com  Tue May 13 09:32:11 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:32:11 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
Message-ID: <dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>

> Don't let yourself be irritated by castironpi

I'm not the sort to get irritated by anyone.  There is value in all
interaction.  Flaming Thunder is itself the averaging of interactions
with many computer languages and conversations with many people, so as
to create a language that allows people to tell a computer what they
want it to do, without having to know very much about how the computer
does it.

On May 13, 3:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Dave Parker wrote:
> > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> >>Yes, I am trying to visualize something.
>
> > If it is related to making furniture comfortable for humans, have you
> > considered painting the furniture with thermochromic paint (
> >http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> > response to temperature, which in part is determined by how hard a
> > body is pressed against it because close contact tends to trap heat.
> > An evenly distributed color might indicated evenly distributed
> > pressure.
>
> Don't let yourself be irritated by castironpi - he's the virtual equivalent
> of a mumbling mad man in this group. Ignorance serves best as remedy - and
> getting a filter to work, as I did (so I only see his postings being
> quoted... a huge relief!)
>
> Diez



From gagsl-py2 at yahoo.com.ar  Sun May 25 13:53:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 14:53:57 -0300
Subject: raising an exception when multiple inheritance involves same
	baseThank
References: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <op.ubp1b7xox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 13:32:39 -0300, Paul McGuire <ptmcg at austin.rr.com> escribi?:

> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
>
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

I think you should exclude the `object` class from the test, because all new-style classes inherit from it and *every* case of multiple inheritance forms a diamond.

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Sat May 24 21:15:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 24 May 2008 18:15:39 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <be2b1f12-7392-48c9-85a7-2e961940f42a@d45g2000hsc.googlegroups.com>

On May 24, 7:12 am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Carl Banks schrieb:
>
> > p = myfunction()
> > if p:
> >     print p
>
> > (I recommend doing it this way in C, too.)
>
> This is okay for if-clauses, but sucks for while-loops:
>
> while (fgets(buf, sizeof(buf), f)) {
>         printf("%s\n", buf);
>
> }


In earlier times, the Python idiom was this:

while True:
    line = f.readline()
    if not line:
        break
    print line

Not the prettiest thing ever, but it works fine, is readable, and
avoids a temporary variable.  In C, given the choice between this or
using assignment expression, I'd say use either one.  (But don't use
the version with a temporary, that's ugly as hell.)

More recent versions of Python have obviated the need to use this
idiom by making it possible to iterate over the lines of a file
directly.  First they added xreadlines:

for line in xreadlines(f):
    print line

Then they deprecated the xreadline function and made it a method:

for line in f.xreadlines():
    print line

Then they recommended you no longer use that, and just made file
objects directly iterable:

for line in f:
    print line

The point is, the Python language developers do share your concern
about these things.  However, they still think assignment epxressions
are a very bad idea, so they've sought other solutions to these
issues.

(But, as I said, they have yet to provide an alternative for elif
clauses; you're stuck with workarounds there.)


Carl Banks


From rocky at panix.com  Wed May 14 23:31:04 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 14 May 2008 23:31:04 -0400
Subject: Running an interactive interpreter inside a python
Message-ID: <wihy76c2qh3.fsf@panix5.panix.com>

The next release of pydb will have the ability to go into ipython from
inside the debugger. Sort of like how in ruby-debug you can go into
irb :-)

For ipython, this can be done pretty simply; there is an IPShellEmbed
method which returns something you can call. But how could one do the
same for the stock python interactive shell?

To take this out of the realm of debugging. What you want to do is to
write a python program that goes into the python interactive shell -
without having to write your own a read/eval loop and deal with
readline, continuation lines, etc.

The solution should also allow
 - variables/methods in the calling PYthon program to be visible
   in the shell
 - variables set in the interactive (sub) shell should persist after the shell 
   terminates, although this is a weaker requirement. POSIX subshells
   for example *don't* work this way.

There has been much written about how to embed Python from C, so I
suppose this may offer one way. And at worst, I could write
a C extension which follows how C Python does this for itself.

But is there a simpler way?

Thanks.





From arnodel at googlemail.com  Tue May 20 05:19:20 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 10:19:20 +0100
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <m23aod8h9j.fsf@googlemail.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
>
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
>
> Thanks.

Out of the blue idea which is probably rubbish:

Create a tree of your words, look at it as a Deterministic Finite
Automaton (DFA), minimise it, you get what some call a DAWG. That
works very well with lots of small words.

e.g.

Words aabc, babc, bbbc.

Minimal DFA:

1 -a-> 2 -a-> 4 -b-> 5 -c-> 6
\             ^
 b-> 3 -a-----+
      \      /
       b----+


To compress a word, simply find its position in alphabetical order,
call that its 'path'.

The 'decompression algorithm' is then (in pseudo-python)

def decompress(DFA, path):
    letters = []
    state = DFA.initial_state
    while not state.is_final():
        transitions = state.transitions
        path, choice = divmod(path, len(transitions))
        state = transitions[choice].new_state
        letters.append(transitions[choice].letter)

I'm not too sure about this :)

-- 
Arnaud


From wizzardx at gmail.com  Sat May 24 15:14:36 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 21:14:36 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <g19fv3$3vl$1@gide.ita.chalmers.se>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
Message-ID: <18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>

Hi again list.

>
> As you come up with the corner case, write a test for it and leave the implementation
> for later. The hard part of coding is always defining your problem. Once it is
> defined (by a test) the solution is just a matter of tidy work.
>

Is it considered to be cheating if you make a test case which always
fails with a "TODO: Make a proper test case" message?

While it is possible to describe all problems in docs, it can be very
hard to write actual test code.

For example: sanity tests. Functions can have tests for situations
that can never occur, or are very hard to reproduce. How do you unit
test for those?

A few examples off the top of my head:

* Code which checks for hardware defects (pentium floating point,
memory or disk errors, etc).

* Code that checks that a file is less than 1 TB large (but you only
have 320 GB harddrives in your testing environment).

* Code which checks if the machine was rebooted over a year ago.

And so on. These I would manually test by temporarily changing
variables in the code, then changing them back. To unit test these you
would need to write mock functions and arrange for the tested code to
call them instead of the python built-ins.

Also, there are places where mock objects can't be used that easily.

eg 1: A complicated function, which needs to check the consistency of
it's local variables at various points.

It *is* possible to unit test those consistency checks, but you may
have to do a lot of re-organization to enable unit testing.

In other cases it might not be appropriate to unit test, because it
makes your tests brittle (as mentioned by another poster).

eg: You call function MyFunc with argument X, and expect to get result Y.

MyFunc calls __private_func1, and __private_func2.

You can check in your unit test that MyFunc returns result Y, but you
shouldn't check __private_func1 and __private_func2 directly, even if
they really should be tested (maybe they sometimes have unwanted side
effects unrelated to MyFunc's return value).

eg: Resource usage.

How do you unit test how much memory, cpu, temporary disk space, etc a
function uses?

eg: Platforms for which unit tests are hard to setup/run.

 - embedded programming. You would need to load your test harness into
the device, and watch LED patterns or feedback over serial. Assuming
it has enough memory and resources :-)
 - mobile devices (probably the same issues as above)

eg: race conditions in multithreaded code: You can't unit test
effectively for these.

And so on.

>
> Agreed. There is no good way of reusing your prototype code in TDD. You end
> up having to throw your propotype away in order to have a proper tested
> implementation in the end. Takes more time up front, but less time over the
> lifecycle of the program you are building.
>

Sounds like you are talking about cases where you have to throw away
the prototype *because* you couldn't unit test it properly? (but it
was otherwise functioning perfectly well).

>>Problem 3: Slows down development in general
>>
>>Having to write tests for all code takes time. Instead of eg: 10 hours
>>coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>>writing all the tests, and 10 on the code.
>
> This is incorrect. It speeds up development in general. The debugging phase of
> development becomes much shorter because the bugs are fewer and the ones you
> have a much shallower. There are so many tests that reduce the scope in which
> you have to search for the bug that it usually becomes trivial to find.

Depends on the type of bug. If it's a bug which breaks the unit tests,
then it can be found quickly. Unit tests won't help with bugs they
don't explicitly cover. eg off-by-one, memory leaks, CPU load,
side-effects (outside what the unit tests test), and so on.

That's another reason why I don't think that unit tests are a silver
bullet. You can have code that's totally wrong, but still succeeds in
the tests (even if they're very detailed). eg: hardcoding return
values expected by the tests, and returning garbage the rest of the
time.

But once you track down problems like the above you can write more
unit tests to catch those exact bugs in the future. This is one case
where I do favour unit tests.

I guess you could compare unit tests to blacklists or anitivirus
software. All of them only catch cases that have been explicitely
coded into them.

>
> I have direct experience from this, getting my company to change to TDD about
> 10 months ago. Productivity has improved enormously. I'd say that we have cut
> between 25 and 50% in development time.
>

Going by your figures and other cases I've read on the web, there are
definitely cases where TDD is beneficial and can save a lot of time.
What I'm not sure of (probably inexperience on my part) is when you
should and shouldn't use TDD, and to what extent.

I'm sure that factors like this have to come in to play when deciding
if and how to use TDD in a given project:

- size and age of the project (new, small code is easier to understand
than large, old)
- complexity & modularity of project
- programming language used (dynamic langs need unit tests more than compiled)
- importance of project (consequences of bugs)
- who the project is for (yourself, inhouse, or for client)
- how easy it is to fix problems in deployed software
- number of developers
- skill & discipline of developers
- development style (waterfall/incremental, etc)
- consistency checks already built into the software

That last one (internal consistency checks) is a big one for me. If
software has a lot of internal consistency checks (contracts), then I
feel that the need for unit tests is a lot less.

>>Problem 4: Can make refactoring difficult.
>>
>>If you have very complete & detailed tests for your project, but one
>>day you need to change the logic fundamentally (maybe change it from
>>single-threaded to multi-threaded, or from running on 1 server to
>>distributed), then you need to do a large amount of test refactoring
>>also. The more tests you have (usually a good thing), the longer it
>>will take to update all the tests, write new ones, etc. It's worse if
>>you have to do all this first before you can start updating the code.
>
> No, this is a total misunderstanding. It makes refactoring much easier.
> It takes a bit of time to refactor the affected tests for the module, but you
> gain so much by having tests that show that your refactoring is not breaking
> code that should be unaffected that it saves the extra time spent many times
> over.
>

Makes refactoring easier how?

I assume you mean the unchanged tests, which check functionality which
should be the same before and after your refactoring. All the other
tests need to be replaced. I agree that the unchanged tests can be
helpful. It's the extra work of unit test maintenance I have a problem
with.

In an extreme case you might refactor the same code multiple times,
requiring the test cases to also be refactored each time too (more
test cases = more work each time). To me it feels like the test cases
can be a lot of 'dead weight', slowing down development.

Even if you want unit tests for the final version which goes to the
customer, you still had to spend time with re-writing unit tests for
all the refactored versions inbetween. To me those intermediate unit
test versions sound like a complete waste of time. Please correct me
if this is also mistaken :-)

> Introducing bugs because you missed some aspect in a refactoring is one of the
> most common problems in non-TDD code and it is a really nasty quality
> concern.

I agree here. But I feel that you can get the same quality by good QA
and human testing (ie: developer does a lot of testing, then hands it
over to testers, then it goes to the customer). Which should be done
whether or not you have unit tests. I feel that unit tests are mainly
good for catching rare cases which might not be tested by a human.

In other words, full-on TDD only becomes really useful when projects
grow large (and complicated) and can't be fully tested by humans?
Until that point, only using unit tests to catch regressions seems to
be more than enough to ensure good quality. (Again, correct me if this
is mistaken).

>>
>>Problem 5: Tests are more important than code
>>
>>You need to justify the extra time spent on writing test code. Tests
>>are nice, and good to have for code maintainability, but they aren't
>>an essential feature (unless you're writing critical software for life
>>support, etc). Clients, deadlines, etc require actual software, not
>>tests for software (that couldn't be completed on time because you
>>spent too much time writing tests first ;-)).
>>
> The tests are as important as the code. As a customer, I don't think I'd buy
> software today unless I know that it has been built using TDD. Certainly I am
> ahead of the curve in this, but it won't be long before this will be required
> by skilled organisations buying software and sooner or later the rest of the
> world will follow.

How much software is written with TDD? Do companies generally
advertise this? I get the idea that most high quality open source
software (Apache, linux kernel, GNU, Python, etc) are developed in a
non-TDD way. What they do have is intelligent developers, coding
conventions,  and a very good testing & QA process. Where they do have
unit tests it's usually for regressions. Why don't they use TDD if it
would make such a big difference? Are you going to stop using open
source software (like Python) which isn't written with TDD?

>
> Getting into a TDD mindset is hard work, but those who succeed produce better
> software with less effort.
>

Thanks for your informative reply. I've learned a bit from this thread
and will definitely look more into TDD :-)

David.


From brad at 16systems.com  Thu May 22 18:20:12 2008
From: brad at 16systems.com (Brad)
Date: Thu, 22 May 2008 18:20:12 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <g14rk0$4pf$1@solaris.cc.vt.edu>

cm_gui wrote:
> Python is slow.

It ain't C++, but it ain't a punch card either... somewhere in between. 
I find it suitable for lots of stuff. I use C++ when performance really 
matters tho... right tool for the job. Learn a good interpreted language 
(Pyhton) and a good compiled language (C or C++) and you'll be just 
fine. Until then, quit bitching.


From mcknight0219 at gmail.com  Fri May 23 14:32:26 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 11:32:26 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com> 
	<69oa1aF33cfteU1@mid.uni-berlin.de>
Message-ID: <2826a237-a4e7-4aa5-a015-de00ef4ed642@w1g2000prd.googlegroups.com>

On May 24, 12:34 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jimmy schrieb:
>
>
>
> > On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
> >> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> >>> Jimmy schrieb:
> >>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> >>>>> Jimmy wrote:
> >>>>>> Hi to all
> >>>>>> python now has grown to a versatile language that can
> >>>>>> accomplish tasks for many different purposes. However,
> >>>>>> AFAIK, little is known about its ability of kernel coding.
> >>>>>> So I am wondering if python can do some kernel coding that
> >>>>>> used to be the private garden of C/C++. For example, can python
> >>>>>> intercept the input of keyboard on a system level? someone told me
> >>>>>> it's a kernel thing, isn't it?
> >>>>>http://wiki.python.org/moin/elmer
> >>>> well, straightly speaking, how can I know a key is pressed on a system-
> >>>> level if
> >>>> using python?
> >>> What has that todo with kernel programming? You can use e.g. pygame to
> >>> get keystrokes. Or under linux, read (if you are root) the keyboard
> >>> input file - I've done that to support several keyboards attached to a
> >>> machine.
> >>> And the original question: no, python can't be used as kernel
> >>> programming language. Amongst other reasons, performance & the GIL
> >>> prevent that.
> >>> Diez
> >> sorry, my aim is not limited to one particular program. Yes, many
> >> library can
> >> permit you to respond to keyboard event, however, what I want is a
> >> universal
> >> function. as long as a key is pressed, no matter where, my program can
> >> repond.
>
> >> I am quite strange with this topic. But according to my understanding,
> >> any event, keyboard event
> >> for example, once triggered, will be dilivered by keyboard driver to X
> >> system, and then
> >> any running program can either choose to respond or ignore. So my
> >> question can be translated to:
> >> how to make my program respond ?
>
> > maybe I'd better elaborate on my question. Back to my original
> > question:
> > intercept keyboard event on a system level. If you are writing program
> > in
> >  emacs, of course, the keyboard inputs are meant for emacs only. What
> > I
> > want is no matter what program you're running, keyboard events can be
> > anyway caught by my program.
>
> > Am I clear with myself? :)
>
> Do you want to intercept the call (prevent that it is passed through to
> e.g. emacs), or are you merely interested in getting it? If the latter,
> you can (as root) access the /dev/input keyboard device and get the
> scan-codes.
>
> The former is more complicated - without research I don't know out of my
> head how to accomplish that. But it must be possible, as e.g. KDE
> observes global key-shortcuts. Most probably a X-server thing.
>
> Diez

thanks, right now I am content with just knowing a key is pressed.
as you said, I checked /etc/input/event1 which seems the input of
keyboard. Then I got some extremely strange code. however, how can
I just simply know a key is pressed?


From timr at probo.com  Tue May 20 00:14:04 2008
From: timr at probo.com (Tim Roberts)
Date: Tue, 20 May 2008 04:14:04 GMT
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>

Monica Leko <monica.leko at gmail.com> wrote:
>
>I have a specific format and I need binary representation.  Does
>Python have some built-in function which will, for instance, represent
>number 15 in exactly 10 bits?

For the record, I'd like to point out that even C cannot do this.  You need
to use shifting and masking to produce a stream of 8-bit bytes, or to
extract your values from a stream of 8-bit bytes.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py2 at yahoo.com.ar  Mon May 19 20:16:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 21:16:51 -0300
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>
	<7xtzgtyjtx.fsf@ruckus.brouhaha.com>
Message-ID: <op.ubfe2dsfx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 20:07:06 -0300, Paul Rubin  
<"http://phr.cx"@NOSPAM.invalid> escribi?:
> blaine <frikker at gmail.com> writes:

>> How is it that you recommend killing a pure python thread?

Make the thread cooperate. It should periodically check some variable or  
condition, and cleanly exit when requested.

>> And also,
>> when i use the 'threading' module am I creating a process, or a (gasp)
>> thread?
>
> A thread.
>
>> (Is this an obvious question - and if so, how does one create
>> a 'process'?)
>
> os.fork()

A more portable answer: using the subprocess module.

-- 
Gabriel Genellina



From yves at zioup.com  Sun May 11 18:51:09 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Sun, 11 May 2008 22:51:09 GMT
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <48275446$0$11628$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <xLKVj.132782$rd2.122246@pd7urf3no>

John Salerno wrote:
> 
> To me, the first example is a pure use of the for loop. You are 
> iterating through an object and *using* the items you are stepping through.
> 
> The second example, however, is simply doing something 10 times, and 
> what it's doing has nothing to do with 'x' or xrange. So it seems like 
> an abuse of the for loop.

Well, I would say this:
myl = ['a', 'b', 'c', 'd']
for i in xrange(len(myl)):
   print myl[i]

As you would see in other languages, is an abuse in python. But in you need 
to iterate 5 times over something. Do you have a cleaner / python'er 
alternative ?

Do you find the following cleaner:

x = 0
while x <= 4:
   print x
   x += 1



Yves.
http://www.SollerS.ca


From collinyeung at shaw.ca  Wed May 21 21:06:06 2008
From: collinyeung at shaw.ca (Collin)
Date: Thu, 22 May 2008 01:06:06 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <2G3Zj.285812$pM4.26927@pd7urf1no>

Dave Parker wrote:
> On May 20, 7:05 pm, Collin <collinye... at shaw.ca> wrote:
> 
>> Personally, FT is a bit meh to me. The way you issue your statements I
>> always think something is wrong, mainly because when I want to define,
>> say, x, in python I'd go:
>>
>> x = "whatever"
>>
>> Instantly noting that I defined x. While in Flaming Thunder I'd have to
>> type:
>>
>> Set x to "whatever"
>>
>> It just feels wrong.
> 
> Actually, it felt wrong to me when I first started working on Flaming
> Thunder because I've been programming for decades and have had all of
> the programming idioms burned into my brain.
> 
> But after getting input from children and teachers, etc, it started
> feeling right.
> 
> For example, consider the two statements:
> 
>      x = 8
>      x = 10
> 
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".
> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).
> 
> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.
> 
> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:
> 
>      Set x to 8.
> 
> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:
> 
> Set QuadraticEquation to a*x^2 + b*x + c = 0.


Then I guess the elementary school kids will use your FT system while we 
  will use our naturally burned-in sense of syntax from other 
programming languages, eh?

Not saying this as a negative or anything, I'm just saying that most of 
us have a habit, and it's not necessarily a bad nor good habit, of doing 
things the way most languages have them done. For example, x = 8 is 
extremely readable, to, I assume, most of us. Set x to 8, it takes some 
time getting used to. Why should we switch to a language that will take 
us time to get used and some more time to understand syntax when we 
already understand and can efficiently use our current languages?

It's like going to the middle of London and screaming: "HEY GUYS GUESS 
WHAT! I JUST INVENTED A NEW LANGUAGE AND IT'S VERY VERY EASY TO LEARN!" 
And the people who would try the language would find the way you do 
everything is very different from English, or their native language, for 
that matter. Best let sleeping dogs lie.

Collin


From jcd at sdf.lonestar.org  Sun May 18 14:13:57 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sun, 18 May 2008 14:13:57 -0400
Subject: [jcd@sdf.lonestar.org: Re: Compress a string]
Message-ID: <20080518181357.GB14680@sdf.lonestar.org>

On Sun, May 18, 2008 at 07:06:10PM +0100, Matt Porter wrote regarding Compress a string:
> 
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
> 
> The code I have so far feels like it could be made clearer and more  
> succinct, but a solution is currently escaping me.
> 
> 
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
> 
> 
> Cheers
> Matt

def compress_str(s): 
    # str is a builtin keyword. Don't overload it.
	out = []
	for c in s:
		if out and c == out[-1]:
			out.append(c) # This is faster than new_str += c
	return ''.join(out) 




From inhahe at gmail.com  Sun May 18 06:44:04 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:44:04 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<SATXj.11281$hv2.7858@bignews5.bellsouth.net>
Message-ID: <SKTXj.11287$hv2.8935@bignews5.bellsouth.net>


> My ideal language would be a natively compiling cross between C++ and
> Python.  Objects declared with a type would be statically typed, objects 
> not declared with a type would be dynamically typed.  There would also be 
> keywords to declare that class names won't be reassigned and class 
> attributes won't be deleted.  Those attributes would be referred to by 
> offset, not hash table keys.


But those attributes would also exist in the hash table because the referer 
can also use a dynamically created name.




From deets at nospam.web.de  Tue May 13 13:26:43 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 19:26:43 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
Message-ID: <68u1avF2ujou9U1@mid.uni-berlin.de>

Dave Parker schrieb:
>> Who has conducted the research that supports that statement? And since when
>> is ^ the better operator for "to the power of" that **? Because latex uses
>> it? I need to see the elementary school students who use that...
> 
> All of the calculators and textbooks that elementary school students
> use, use "^" for powers.  Just like Flaming Thunder does.  I haven't
> seen "**" for powers since FORTRAN.

I haven't seen a power operator in elementary school at all. And even 
*if* I did see it, it would have been in the raised-text-variant, *not* 
the caret that is a crutch.

Diez


From tamim.shahriar at gmail.com  Mon May 19 01:27:24 2008
From: tamim.shahriar at gmail.com (subeen)
Date: Sun, 18 May 2008 22:27:24 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<mailman.1326.1211162009.12834.python-list@python.org>
Message-ID: <9dd32e12-9f4e-49f9-b2eb-cc8c58a60e85@z16g2000prn.googlegroups.com>

On May 19, 7:52 am, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Mon, 19 May 2008 08:20:22 +1000, John Salerno
>
> <johnj... at NOSPAMgmail.com> wrote:
> > Hey all. Just thought I'd ask a general question for my own interest.
> > Every time I think of something I might do in Python, it usually
> > involves creating a GUI interface, so I was wondering what kind of work
> > you all do with Python that does *not* involve any GUI work. This could
> > be any little scripts you write for your own benefit, or what you do at
> > work, if you feel like talking about that! :)
>
> > Thanks.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> - Enhancing existing products by scripting new features.
> - Interface between databases, Excel and text files.
> - Convert data between flat files and XML.
> - Manage files for build processes.
> - Automating processes (e.g. checkout, builds, FTP).
>
> Wish I had some reasons to make a GUI application in Python.
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I also haven't used GUI in python yet. I basically write web crawlers/
spiders in Python where GUI is not essential.

regards,
Subeen
http://love-python.blogspot.com/


From rolf.oltmans at gmail.com  Fri May  2 14:51:42 2008
From: rolf.oltmans at gmail.com (Oltmans)
Date: Fri, 2 May 2008 11:51:42 -0700 (PDT)
Subject: Searching and replacing text ?
Message-ID: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>

Hi,

I'm new to Python (and admittedly not a very good programmer) and I've
come across a scenario where I've to search and replace text in a
file.

For the sake of an example, I'm searching for every occurence of the
text
[[http://www.hotmail.com -> Hotmail]]

I've to replace it with
[http://www.hotmail.com Hotmail]

I've come up with following scheme
p=re.compile(r'\[\[')
q=re.compile(r'->')

p.sub('[',txt)
q.sub('\b',txt)

Give that I don't have very strong RegEX background, this doesn't look
very elegant. Is there some other way I can accomplish the same thing?
Moreover, please note that I'm using 'p' and 'q' for two regex and
then calling 'sub()' on both p and q. Can't I just do that by
employing one RegEx and then calling sub() only once?

Please enlighten me. Thanks in advance.



From kyosohma at gmail.com  Tue May 27 12:25:34 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 09:25:34 -0700 (PDT)
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org>
Message-ID: <871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>

On May 27, 10:34?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> ? ? ? ? ? ? def str2datetime(s):
> ? ? ? ? ? ? ? ? #28 May 2008 12:38:16 BDT
> ? ? ? ? ? ? ? ? return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
>
> ? ? ? ? ? ? #.... some code here....
> ? ? ? ? ? ? print repr(pd)
> ? ? ? ? ? ? print str2datetime(pd)
>
> Result:
>
> '24 May 2008 12:38:16 BDT'
> Traceback (most recent call last):
> ? File "__init__.py", line 40, in <module>
> ? ? print ssc.get_order_data('202-9810306-3236320')
> ? File
> "/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py",
> line 306, in get_order_data
> ? ? print str2datetime(pd)
> ? File
> "/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py",
> line 299, in str2datetime
> ? ? return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
> ? File "/usr/local/lib/python2.5/_strptime.py", line 331, in strptime
> ? ? (data_string, format))
> ValueError: time data did not match format: ?data=24 May 2008 12:38:16
> BDT ?fmt=%d %b %Y %H:%M:%S %Z
>
> I think that the format is correct. What am I doing wrong?
>
> Thanks,
>
> ? ?Laszlo


I tried taking out components until I got it to work. It seems to be
choking on the time zone part of it. If you remove the "BDT" from your
string and the "%Z" from your formatter, it works. Unfortunately, I do
not know why it doesn't work the other way.

Mike


From python at bdurham.com  Tue May  6 17:43:16 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 17:43:16 -0400
Subject: Generate labels for a multi-level outline
Message-ID: <1210110196.17982.1251761433@webmail.messagingengine.com>

I need to generate multi-level incrementing labels for an
outline/hierarchy where the string for each level of a label is based on
an incrementing sequence like 1, 2, 3 or A, B, C, or even I, II, III.
For simplicity, assume that each level's label segment is separated by a
period (".").

I will pass an integer level (1 ... N) to this function/object so that
level specific counters get reset when the level changes.

I will use this function/object to generate output like:

Label     Level
I.        1
I.A.      2
I.B.      2
I.C.      2
I.D.      2
I.D.1.    3
I.D.2.    3
I.D.3.    3
I.E.      2
II.       1

Is there a pre-built class for generating label sequences like this?
(I'm not sure what I would use as search terms to google for such a
class).

While this sounds like a simple/fun class to write, I think it could
quickly get complicated when one factors in parsing rules for each
level's label type, separators, and error checking. If there's an
existing, road tested class (with unit tests) that does this, I would
rather avoid re-inventing/re-testing the wheel.

Thanks,
Malcolm


From kamhung.soh at gmail.com  Thu May 15 00:37:49 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 15 May 2008 14:37:49 +1000
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
	<NkNWj.138991$Cj7.33283@pd7urf2no>
Message-ID: <op.ua6htbbbev04yd@melwxp23>

On Thu, 15 May 2008 12:36:29 +1000, Collin <collinyeung at shaw.ca> wrote:

> Kam-Hung Soh wrote:
>> On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:
>>
>>> Gabriel Genellina wrote:
>>>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca>  
>>>> escribi?:
>>>>
>>>>> Collin wrote:
>>>>>> I'm pretty new to Python, but this has really bugged me. I can't  
>>>>>> find a
>>>>>> way around it.
>>>>>>
>>>>>>
>>>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>>>
>>>>>> Any help would be appreciated. Thanks.
>>>>>
>>>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>>>  No need to apologize...
>>>>
>>>>> I read the error message just now a bit more carefully, and I tried
>>>>> something. I tried defining "yes" as some random numerical value.  
>>>>> Then
>>>>> when I did:
>>>>> (example code)
>>>>>
>>>>> yes = 123123983 #some number
>>>>> test = input("Test test test ")
>>>>> if test == yes:
>>>>>     print "It worked."
>>>>> else:
>>>>>     print "failed"
>>>>>
>>>>> (example code off)
>>>>  The usual way for Python<3.0 is:
>>>>  answer = raw_input("Test test test ").lower()
>>>> if answer == "yes":
>>>>      ...
>>>>  The input() function evaluates user input as an expression: if he  
>>>> types 2+5 the input() function returns the integer 7. I would never  
>>>> use input() in a program - it's way too unsafe; use always raw_input  
>>>> instead.
>>>>
>>>
>>> If I use it like that, do I have to import anything to have the  
>>> .lower() work? And if I do, what does the .lower() signify?
>>> -- http://mail.python.org/mailman/listinfo/python-list
>>>
>>  You don't need to import any module to use ".lower()"; it is a method  
>> of a string.  raw_input() returns a string, so you can use methods of a  
>> string.
>>  Try the following statement to see what happens:
>> "ABCDE".lower()
>>
>
> So the .lower() string method is just to convert the string to lowercase  
> letters so that you don't have to type a bunch of if - then statements  
> in both cases, I'm assuming?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's right.  If you normalize your input to all lower case or upper  
case, you make it easier to process user input.

Regards,

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From metallourlante at gmail.com  Sat May 17 07:08:56 2008
From: metallourlante at gmail.com (Alex)
Date: Sat, 17 May 2008 04:08:56 -0700 (PDT)
Subject: Help on thread pool
Message-ID: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>

Hi all.

In order to understand the concept of threading pool in python I'm
working on a simple single-site web crawler.
I would like to stop the program when the threading pool have
downloaded all internal links from a web site, but now my program keep
waiting forever even if there are no more links to download.

Here's my code, I appreciate any comments, I'm programming just for
fun and learning ;-)

Thanks in advance.

from BeautifulSoup import BeautifulSoup
import urllib
from pprint import pprint
import string
from urlparse import urlparse
import sys
from threading import Thread
import time
from Queue import Queue

#dirty hack: set default encoding to utf-8
reload(sys)
sys.setdefaultencoding('utf-8')

opener = urllib.FancyURLopener({})

class Crawler:

    def __init__(self):
        """
        Constructor
        """
        self.missed = 0
        self.url_list = []
        self.urls_queue = Queue()
        self.num_threads = 5

        self._create_threads()

    def get_internal_links(self,url):
        """
        Get all internal links from a web page and feed the queue
        """
        self.url = url
        url_netloc = urlparse(self.url).netloc
        print "Downloading... ", self.url
        time.sleep(5)
        try:
            p = opener.open(self.url)
            #print p.info()
        except IOError:
            print "error connecting to ", self.url
            print "wait..."
            time.sleep(5)
            print "retry..."
            try:
                p = urllib.urlopen(self.url)
            except IOError:
              self.missed = self.missed + 1
              return None

        html = p.read()
        soup = BeautifulSoup(html)
        anchors = soup.findAll('a')
        links = [ str(anchor['href']) for anchor in anchors]
        internal_links = [link for link in links if
(urlparse(link).netloc == url_netloc)]

        for link in internal_links:
            if link not in self.url_list and link != self.url:
                self.url_list.append(link)
                self.urls_queue.put(link)
        print "Queue size: ", self.urls_queue.qsize()
        print "List size: ", str(len(self.url_list))
        print "Errors: ", str(self.missed)
        self._queue_consumer()


    def _queue_consumer(self):
        """
        Consume the queue
        """
        while True:
            url = self.urls_queue.get()
            print 'Next url: ', url
            self.get_internal_links(url)
            self.urls_queue.task_done()


    def _create_threads(self):
        """
        Set up some threads to fetch pages
        """
        for i in range(self.num_threads):
	        worker = Thread(target=self._queue_consumer, args=())
	        worker.setDaemon(True)
	        worker.start()

#-----------------------------------------------------------------------------
#

if __name__ == '__main__':

    c = Crawler()
    c.get_internal_links('http://www.thinkpragmatic.net/')




From dmitrey.kroshko at scipy.org  Sun May 18 14:55:33 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 11:55:33 -0700 (PDT)
Subject: howto use pylint from Eric IDE?
References: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>
	<g0pc3h$jgk$1@online.de>
Message-ID: <6f8d242c-d7e6-4082-9cb2-e2f719a1a6dc@y21g2000hsf.googlegroups.com>

Since I have no project (and willing to create the one), just several
py-files, the Project->Check button is disabled.
Are there any other methods in v4.1.1 or more recent?
Thx, D.

On 18 ???, 16:48, Detlev Offenbach <det... at die-offenbachs.de> wrote:
> dmitrey wrote:
> > Hi all,
>
> > I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
> > cannot find how to use pylint from Eric IDE GUI.
> > Does anyone know?
>
> > Thank you in advance, D.
>
> Project->Check->Run PyLint
>
> Regards,
> Detlev
> --
> Detlev Offenbach
> det... at die-offenbachs.de



From wuwei23 at gmail.com  Mon May 26 06:47:36 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 03:47:36 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
Message-ID: <b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9@z16g2000prn.googlegroups.com>

On May 26, 7:21 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
> But I'd read that Python 3 is very different in many important ways.
> I read it right there on the Py3K site!  I can't make sense of how,
> why, even what, exactly, but that's not a misimpression on my part, I
> certain nonetheless...it's not just cosmetic changes but important
> ones pertaining to a sort of "linguistic logic" I gather....

Well, let's see what Guido says about the issue:

Q. I want to learn Python. Should I learn Python 2.6 or Python 3.0?

A. Definitely learn Python 2.x (the latest version out is 2.5). I
expect it'll be two years before you'll need to learn Python 3.0, and
the differences aren't that great from a beginner's perspective: most
of what you'll learn about 2.x will still hold about 3.0.

(from http://www.artima.com/weblogs/viewpost.jsp?thread=211200)


From castironpi at gmail.com  Sat May 17 23:55:19 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 20:55:19 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<g0mcd2$2qk0$2@news.mtu.ru>
	<91d4cf3b-e71f-4e73-90da-db0735f34035@c65g2000hsa.googlegroups.com>
Message-ID: <4a0aa0fb-4c43-4690-b31d-83475357da22@z72g2000hsb.googlegroups.com>

On May 17, 9:22?pm, castironpi <castiro... at gmail.com> wrote:
> On May 17, 5:35?am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
>
>
>
>
> > On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:
> > > Full day later, I think it, to emphasize state, would prioritize
> > > context. ?The reason for the huge ramble was, believe it or not,
> > > namespace conflict... as though any other states around here might nose
> > > in. ?And thanks to 'inhahe' for coming back with the question. ?...Which
> > > would explain next move to 'prioritize context'. Context is a high
> > > priority for people.
>
> > > I'm proposing to start on one on a computer. ?The first things a
> > > computer 'knows' are the boot, keyboard, & mouse. ?Yet on another scale,
> > > the first things it knows are BIOS, file system, and OS. ?On still
> > > another, the only thing it knows are interruptions. ?Knowledge is
> > > important to context. ?(The scales are ram on disk on, ram on disk off,
> > > and ram off, which may tell of the currency they and their power are
> > > bought with. ?Thence, we should be getting different values for lengths
> > > of time.)
>
> > > (Furthermore, we're all on different longitudes -and- latitudes.)
>
> > > Context comes from motion, perception, and composite perception
> > > (reperception e.a.o. memory). ?There is some reason to believe that
> > > motion and sight are different senses, perhaps so with stationary sound
> > > (gatcha) and mobile sound too. ?Do you go deaf of a tone after prolonged
> > > duration? ?That makes computers valuable commodities*: they have a
> > > symbolic interface, which no other unlive objects have. ?They have both
> > > mouse and keyboard.
>
> > > *I'm sure there is a precision to wants: what magnitude of what types of
> > > action a person wants from a day and for a time-- what energy states
> > > they go to and from (note phone on come to and come from.)
>
> > > Therefore, context should originate in mouse and keyboard.
>
> > > Humans have symbolic know-how: knowledge of how to convey intent
> > > digitally, though it may be there is no interpolation of 'intent per
> > > mouse-or-key', even though people are prone to empathize with faces.
> > > However, if you start with a 'me' and a 'no', you can get pretty
> > > logical.
>
> > > Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> > > rationally dimensional (?), though they do have magnitudes per mass and
> > > volume. ?The contingent of 'rationally dimensional' is having or
> > > beknowing/benouncing an orthonormal basis. ?Incidentally, '''orthography
> > > of a language specifies the correct way of using a specific writing
> > > system to write the language. .. Orthography is derived from Greek ?????
> > > orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
>
> > > Further incidentally, context and state may have more important in
> > > common than priority and price: privacy and safety are involved ex
> > > hypothesi. ?Incidentally = ...
>
> > > It is not clear that the first (cheapest best) human-computer language
> > > is a computer language, though if two were orthonormal in comparison to
> > > life, Python's fine. ?Not my first.
>
> > > In privacy concerns, it is not clear that duals aren't primitives to
> > > humans. ?What's a brain primitive? ?Lol: what is a primitive brain?
>
> > > On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> > >> I'm not an expert in this but what does it mean to emphasize state? ?It
> > >> seems the opposite of that would be a) functional programming, and b)
> > >> passing parameters instead of using global or relatively local
> > >> variables. And maybe c) coroutines (generators as implemented in
> > >> Python), although perhaps coroutines could be said to emphasize state
> > >> inasmuch as they go out of their way to capture, objectify and reuse it
> > >> (Stackless' microthreads, even moreso). ?And Python seems to be
> > >> well-noted for implementing some functional programming methodology,
> > >> and as for passing parameters it's just as object-oriented as the rest
> > >> of them.
>
> > >> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > >> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > >> > true?- Hide quoted text -
>
> > >> - Show quoted text -
>
> > Castironpi,
>
> > I love you! You remind me of all the kittens and puuppies I had when I
> > was a child.
>
> > I #define this. Hope your database could give us something funny again.
>
> > -- Ivan- Hide quoted text -
>
> > - Show quoted text -
>
> I have to talk about crossing threats. ?But talking about threads is
> like talking, and people talk about food. ?What are some threats to be
> scared of? ?What about threads to be thunder?- Hide quoted text -
>
> - Show quoted text -

I have to question sincerity, which is disappointing for a night.
Does anyone live in a city?


From sajmikins at gmail.com  Wed May 21 13:11:09 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 21 May 2008 10:11:09 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com> 
	<48340938$0$10773$426a74cc@news.free.fr>
Message-ID: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>

On May 21, 4:36 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Simon Forman a ?crit :
>
>
>
> > On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> >> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
> >>> You don't need all those conditionals. A set differs from a list
> >>> precisely in the fact that each element is unique. And since the
> >>> function is expecting "s" to be an iterable object, it can be
> >>> constructed even without a for loop:
> >>> def compress(s):
> >>>     return list(set(s))
> >>> That does the trick.
> >> Only if order does not need to be maintained.  list(set(s)) will not
> >> necessarily keep the unique characters in the order they are seen.
> >> We'll have to check with the OP to see if this is important (I just
> >> assumed that it was because of the use of list comps).
>
> >> -- Paul
>
> > If order is important, you can use sorted() instead of list() like so:
>
> > def compress(s):
> >     new = sorted(set(s), key=s.index)
> >     return return ''.join(new)
>
> This won't still preserve the *original* order.


I don't understand.

new will contain each unique item in s, sorted in order of the items'
first occurance in s, right?
There are other ways to do it (other functions that could be passed to
sorted() as the key arg) of course, but this seems like a good value
of "original order", no? :)

Regards,
~S


From marco at sferacarta.com  Thu May  8 11:51:17 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 17:51:17 +0200
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <_jFUj.36624$o06.17318@tornado.fastwebnet.it>

spectrumdt at gmail.com wrote:

> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python.

It should work.

Do you have a bare except: which intercepts SystemExit as well?

If so, be as specific as possible in what you intercept, or at least 
catch StandardError:

In [1]: StandardError ?
Type:           type
Base Class:     <type 'type'>
String Form:    <type 'exceptions.StandardError'>
Namespace:      Python builtin
Docstring:
     Base class for all standard Python exceptions that do not represent
     interpreter exiting.


From castironpi at gmail.com  Wed May 14 13:54:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:54:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <mailman.1117.1210772083.12834.python-list@python.org> 
	<6908kuF2ud4e1U1@mid.uni-berlin.de>
Message-ID: <72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>

On May 14, 8:43?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >>> That's also a myth. ?For example, if C is easy to maintain, why is
> >>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> >>> the world? ?There should be lots of single-asset 8-by-8 shotgun cross
> >>> compilers written in C, if C is easier to maintain.
> >>Not only is it the world's only "single-asset 8-by-8 shotgun cross
> >>compiler," but according to google, it's also the world's only "shotgun
> >>cross compiler" period. ?But I guess if you make up your own terminology
> >>you're bound to be unique. ?:) ?Do you mind if I ask: what exactly is a
> >>single-asset 8x8 shotgun cross compiler, and what makes that of any
> >>value to me?
>
> > The web page explains. ?It's a compiler that runs on 8 platforms and can
> > generate executables for any of them on any of them. ?It's not _totally_
> > clear about what "single-asset" means, but it gives the impression (and
> > the term somewhat suggests) that this means there's a single executable
> > that does all of this (compare to gcc's design, where support for cross
> > compiling to another arch is provided by a separate executable).
>
> Which isn't too hard if all you have are simple datatypes as a handfull
> numerical types + strings.
>
> Besides, from what I see, the supported platforms all are x86, 32bit &
> 64bit. And I bet GCC works pretty unmodified amongst these as well - only
> binary formats differ. But let Flaming Thunder grow a library system with
> dynamic loading, and I wonder how well his crosscompiler works..
>
> Diez- Hide quoted text -
>
> - Show quoted text -

8x8 is pretty easy to aim for.  Turn on 16x16, and you're the laptop
to stand on.  FxF?


From Lie.1296 at gmail.com  Wed May 21 14:23:58 2008
From: Lie.1296 at gmail.com (Lie)
Date: Wed, 21 May 2008 11:23:58 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <a93ad901-3ea4-4d72-be3e-b1edffd08221@w34g2000prm.googlegroups.com>

On May 20, 2:39?am, destroooooy <destrooo... at gmail.com> wrote:
> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.
>
> Thanks in advance!

If we're talking in English, it would be like this:

There is a person with a black hair called A
There is another person with a black hair called B
A has a nickname C

All of these statements are true:
A.haircolor == B.haircolor
A is C

but this is NOT true:
A is B # is False

and this is debatable:
A == B

whether A is similar enough to B so that they can be said to be equal
is debatable and depends on the purpose of the comparison (which is
why equality comparison is overridable while identity comparison is
not).


From alefnula at gmail.com  Fri May  9 09:35:45 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 06:35:45 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
	<50ea9d09-a315-4342-aaac-f5d8e5c5da15@x41g2000hsb.googlegroups.com>
Message-ID: <13f84fe5-e60e-493e-9301-ed178344f6e5@26g2000hsk.googlegroups.com>

I figured out the first two solutions, but the third looks like the
most cleaner, think I'll use that one...

Thank you everyone. :)

On May 9, 3:24 pm, George Sakkis <george.sak... at gmail.com> wrote:
> The decorator does receive the correct function. The problem is that
> at this point __init__ is still a plain function, not a method, i.e.
> the sequence is:
>    function -> decorated function -> method
>
> There are several workarounds if you really want to differentiate
> between functions and methods, none of them perfect:
>
> - Apply the decorator after the class has been built, i.e. after the
> functions have been wrapped in (unbound) methods:
>     A.__init__ = w(A.__init__)
>
> - (Risky Hack): Guess whether a function is intended to be wrapped in
> a method by checking whether its first argument is named "self".
> Obviously this is not foolproof and it doesn't work for static/class
> methods.
>
> - Have two different decorators, one intended for plain functions and
> one for functions-to-be-methods (e.g. @deco, @decomethod).
>
> George



From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:52:22 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:52:22 +0200
Subject: python newbie: some surprises
In-Reply-To: <VHQUj.124646$Cj7.90968@pd7urf2no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <482410c6$0$5108$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
(snip)
> I see the point of the OP. Couldn't the new-line be used as an 
> equivalent of  ':', 


Technically, yes. OTHO, the ':' helps editors doing proper indentation.


From znfmail-pythonlang at yahoo.com  Wed May 14 11:30:19 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Wed, 14 May 2008 11:30:19 -0400
Subject: working with images (PIL ?)
Message-ID: <g0f0ib$3im$1@aioe.org>

I need to write a program to examine images (JPG) and determine how much 
area is whitespace. We need to throw a returned image out if too much of it 
is whitespace from the dataset we're working with. I've been examining the 
Python Image Library and can not determine if it offers the needed 
functionality. Does anyone have suggestions of other image libraries I 
should be looking at it, or if PIL can do what I need? 




From scott.hafeman at rogers.com  Fri May 23 13:14:05 2008
From: scott.hafeman at rogers.com (scott.hafeman at rogers.com)
Date: Fri, 23 May 2008 10:14:05 -0700 (PDT)
Subject: Shell-independent *nix setup script
References: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
	<g14ojr$mb$1@solaris.cc.vt.edu>
Message-ID: <5c476ba7-1189-465f-b964-61790da9d0e4@w4g2000prd.googlegroups.com>

On May 22, 5:29?pm, brad <byte8b... at gmail.com> wrote:
> scott.hafe... at rogers.com wrote:
> > Hi,
> > Is it worthwhile maintaining a production application setup script in
> > Python as opposed to shell-script? ?
>
> I do not think so. Perhaps 'in conjunction with', but not 'opposed
> to'... sh is the lowest common denominator of shells. Script for sh and
> your script will run on most any Unix. Python is gaining acceptance, but
> is still not present everywhere by default... Solaris for example.

If we consider the approach 'in conjunction with', is the following
adequately robust?
$ source app_setup.sh

#File: app_setup.sh
# -. shell-script .-
# Assume we can figure out some basic version of a python interpreter:
#  standalone executable
#  embedded within another application, providing basic libpython.a
features
#
$PYTHON sniffEnvWithComplexLogic.py 'shCompatibleEnvSettings.txt'
source shCompatibleEnvSettings.txt


From eduardo.padoan at gmail.com  Fri May 16 18:38:52 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 16 May 2008 19:38:52 -0300
Subject: can't delete from a dictionary in a loop
In-Reply-To: <482DFF63.7020701@islandtraining.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<482DFF63.7020701@islandtraining.com>
Message-ID: <dea92f560805161538w28aacc8fn3eea1c44f5574d49@mail.gmail.com>

On Fri, May 16, 2008 at 6:40 PM, Gary Herron <gherron at islandtraining.com> wrote:
> bruno.desthuilliers at gmail.com wrote:
>>
>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>
>>>
>>> Dan Upton wrote:
>>>
>>>>
>>>> for pid in procs_dict:
>>>>  if procs_dict[pid].poll() != None
>>>>   # do the counter updates
>>>>   del procs_dict[pid]
>>>>      The problem:
>>>>      RuntimeError: dictionary changed size during iteration
>>>>
>>>
>>> I don't know if the setup with the pids in a dictionary is the best way
>>> to
>>> manage a pool of processes... I'll leave it others, presumably more
>>> knowledgable, to comment on that. :-)  But I can tell you how to solve
>>> the
>>> immediate problem:
>>>
>>>   for pid in procs_dict.keys():
>>>
>
> No, keys() produces a list (which is what is wanted here).
> It's iterkeys() that produces an iterator which would reproduce the OP's
> problem.
>
> And then, in Python3, keys() produces something else altogether (call a view
> of the dictionary) which would provoke the same problem, so yet another
> solution would have to be found then.

In Python 3.0, list(procs_dict.keys()) would have the same effect.



> Gary Herron
>
>>
>> I'm afraid this will do the same exact thing. A for loop on a dict
>> iterates over the dict keys, so both statements are strictly
>> equivalent from a practical POV.
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
    Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From squareswallower at 1ya2hoo3.net  Wed May  7 21:02:12 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Wed, 7 May 2008 19:02:12 -0600
Subject: anagram finder / dict mapping question
Message-ID: <fvtjek$80a$1@news.xmission.com>

Hi All,

I wrote a program that takes a string sequence and finds all the words 
inside a text file (one word per line) and prints them:

def anagfind(letters): 	#find anagrams of these letters
	fin = open('text.txt')	#one word per line file
	wordbox = []		 #this is where the words will go
	for line in fin:
		word = line.strip()
		count = 0
		for char in letters:
			if char not in word:
				break
			else:
				count += 1
			if count == len(word):
				wordbox.append(word)
	return wordbox

Now I'd like to modify the code to naturally find all anagrams inside a 
wordlist.  What would be the best way to do this?  Using Hints?  Is it 
possible to iterate over dict keys?  How can I make a dict that maps 
from a set of letters to a list of words that are spelled from those 
letters?  Wouldn't I need to make the set of letters a key in a dict?

As always - Thanks for helping someone trying to learn...

Dave



From max at alcyone.com  Fri May  2 14:32:01 2008
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 02 May 2008 11:32:01 -0700
Subject: Do you know of a much simpler way of writing a program that writes
	a program?
In-Reply-To: <mailman.455.1209736660.12834.python-list@python.org>
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <CcydnSHH88u7w4bVnZ2dnUVZ_u-dnZ2d@speakeasy.net>

mcse jung wrote:

> Here is asample program that writes a program and then executes it.  
> Do you knowof a much simpler way of writing a program that writes a program?

It looks like you have a program which is more printed text than program 
logic.  In which case, the usual solution is to use a templating system, 
where most of the text is unmodified and you only set out the specific 
areas where you want to insert logic.

EmPy is one:

	http://www.alcyone.com/software/empy/

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From castironpi at gmail.com  Sun May  4 07:11:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 04:11:35 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
Message-ID: <dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>

On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>
> > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
> >> I'm actually curious if there's a way to write a generator function
> >> (not a generator expression) in C, or what the simplest way to do it
> >> is... besides link the Python run-time.
>
> > The reference implementation of Python is written in C, so obviously there
> > must be a way to write something like generators in C.
>
> Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
> See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> --
> Gabriel Genellina

Gabriel,
How did your attempt turn out from last May?  At first look, it's
outside the scope of Python, but it is not the scope of C
necessarily.  Generators offer a lot of simplicity (which I haven't
read about extensively, but am starting to see) that could gain some
reputation for Python.  What is the midpoint at which C could meet
Python?

There is no such thing as a 'frame' per se in C; byte code is
integral.  As there is no such thing as suspended state without
frames, and no such thing as generators without suspended state.  It's
a hard thing to Google for without knowing the prior terminology for
the work that's already been done on them in C.  What work is there?
Are any devs interested in pursuing it?

The frame implementation.

http://svn.python.org/projects/python/trunk/Include/frameobject.h
http://svn.python.org/projects/python/trunk/Objects/frameobject.c

The generator code.

http://svn.python.org/projects/python/trunk/Include/genobject.h
http://svn.python.org/projects/python/trunk/Objects/genobject.c

I used Microsoft's search engine (python frame generator
site:svn.python.org , links 3 and 5) to find it.


From hdante at gmail.com  Fri May 30 10:36:50 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 30 May 2008 07:36:50 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com> 
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com> 
	<mailman.1626.1211831386.12834.python-list@python.org>
	<80531$483b266d$3799@news.teranews.com>
Message-ID: <eb20fd69-5dea-42c1-a66a-97aef96f6af9@26g2000hsk.googlegroups.com>

On May 26, 6:06?pm, Paul Miller <n... at this.time> wrote:
> On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:
> > On Mon, May 26, 2008 at 3:22 PM, ?<miller.pau... at gmail.com> wrote:
> > I don't know if it would necessarily look like the CPython VM, except
> > for the decode stage (this being said without any knowledge of the
> > CPython implementation, but with more than I ever thought I'd know about
> > processor architecture/microarchitecture)
>
> Out of curiosity, do you know how easy it would be to make a Python chip
> using FPGAs? ?I have little to no hardware knowledge, but it sounds like
> a fun project in any case. ?Even if it's not likely to have blazing
> performance, it'd be cool to load Python bytecode directly into
> memory. :-)
>
> --
> code.py: a blog about Python. ?http://pythonista.wordpress.com
> ** Posted fromhttp://www.teranews.com**

 The python VM is too "high level". :-) I think a python CPU would
need to be developed in two layers, one that looks like a typical
processor and another that executes complex instructions
(microcode ?). The low level part takes some weeks (one week or so if
you have the whole architecture figured out) in VHDL. Once I claimed
to have done this in an April Fool's day. It was fun. :-D


From python-url at phaseit.net  Mon May 19 13:49:51 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 19 May 2008 17:49:51 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 19)
Message-ID: <g0sejv$t99$1@lairds.us>

QOTW:  "IIRC the idea was so that managers could write programs in English.
It failed because nobody could write a parser that would handle something
like 'The bottom line is that the stakeholder group requires the situation
going forward to be such as to facilitate the variable known as x to provide
the same outcome when stimulated by dereferencing as the variable known as
y'." - John Machin
    http://groups.google.com/group/comp.lang.python/msg/aefcc0ca19f6d9b3,
    from his oral history of COBOL

    
    A problem with async_chat.push and why it works that way:
        http://mail.python.org/pipermail/python-list/2008-May/491027.html
    
    How to remove dictionary entries when iterating over it:
        http://mail.python.org/pipermail/python-list/2008-May/491739.html
    
    Classmethods: why do they exist, and its behavior compared with metaclass
    methods:
        http://mail.python.org/pipermail/python-list/2008-May/491280.html
        http://mail.python.org/pipermail/python-list/2008-May/491793.html

    Free PDFs of *Python Magazine* available:
	http://mail.python.org/pipermail/advocacy/2008-May/000587.html
    
    Two problems due to the "all objects are comparable by default" philosophy 
    in Python 2.x:
        http://mail.python.org/pipermail/python-list/2008-May/491600.html
        http://mail.python.org/pipermail/python-list/2008-May/491388.html
    
    A hundred ways of writing the FizzBuzz test - and whether it is effective
    or not:
        http://mail.python.org/pipermail/python-list/2008-May/490584.html
    
    Why to learn Python if one doesn't have to:
        http://mail.python.org/pipermail/python-list/2008-May/490856.html
    
    How to create a restricted (safer) Python environment:
        http://mail.python.org/pipermail/python-list/2008-May/490705.html
    
    How to emulate the "indexed property" concept from Object Pascal:
        http://mail.python.org/pipermail/python-list/2008-May/491354.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
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news about posting archives.


From mcknight0219 at gmail.com  Mon May 12 03:25:25 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 00:25:25 -0700 (PDT)
Subject: Problem with custom events in wxpython
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
	<mailman.941.1210519666.12834.python-list@python.org>
Message-ID: <3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>

On May 11, 11:27 pm, "Frank Niessink" <fr... at niessink.com> wrote:
> Hi Jimmy,
>
> 2008/5/11 Jimmy <mcknight0... at gmail.com>:
>
> > hi, all
>
> > I'm having a problem with creating custom events in wxpython.
>
> > I have a class A handling some data processing work and another class
> > B of GUI matter. I need GUI to display information when data in A is
> > updated.
> > I know cutom events in wxpython may work.
>
> You may want to look at the pubsub module. Available as wx.lib.pubsub
> in wxPython:http://www.wxpython.org/docs/api/wx.lib.pubsub-module.html,
> and also available separately on PyPI:http://pypi.python.org/pypi/PyPubSub/
>
> Cheers, Frank

hi, thanks
it works! however, it seems the message can not be exchanged between
processes :(
actually what I want to do is let a running process send data to GUI
process and display it


From arnodel at googlemail.com  Tue May 20 14:38:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 19:38:48 +0100
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
	<g0v4n8$4dk$1@registered.motzarella.org>
Message-ID: <m2hccs7rd3.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Nikhil wrote:
>> Hi,
>>
>> I am using python -i, and I find it hard typing/pasting the commands
>> from the previous interactive shell. Basically, is there anyway that
>> I can preserve the history in the shell?
>> I guess but not sure there should be something like ~/.pyrc for
>> configuring such but can someone please let me know what is the
>> effective environment variable to preserve the history?
>>
>> Thanks,
>> Nikhil
> I figured it out. This below thing works fine for me.
> BTW, I got it from http://docs.python.org/tut/node15.html. A little
> search would not hurt ;-)

Or you could use IPython (http://ipython.scipy.org/), "an Enhanced
Python Shell".

-- 
Arnaud


From castironpi at gmail.com  Wed May  7 20:22:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:22:31 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<fvtfni$6pj$2@news.mtu.ru>
Message-ID: <8e6cc35c-a4a8-46ca-9bbb-798fb193f530@j22g2000hsf.googlegroups.com>

On May 7, 6:58?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Wed, 07 May 2008 23:46:33 +0000, Ivan Illarionov wrote:
> > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>
> >> Is there a way to do:
> >> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> >> x[0,2:6]
>
> >> That would return:
> >> [0, 3, 4, 5, 6]
>
> > IMHO this notation is confusing.
>
> > What's wrong with:
> > [0]+x[2:6]
>
> >> I am surprised this notation is not supported, it seems intuitive. A
> >> concrete example of the sort of thing I want to do:
>
> >> p = file('/etc/passwd').readlines()
> >> q = [ e.strip().split(':')[0,2:] for e in p ]
>
> >> (getting rid of the password / x field)
>
> > This works and is clearer:
> > [[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]
>
> or maybe you wanted to do this:
>
> >>> [e.split(':')[0] for e in open('/etc/passwd')]
>
> ['root', 'daemon', 'bin', 'sys', 'sync', ...]
>
> What are you trying to get from /etc/passwd?
>
> --
> Ivan- Hide quoted text -
>
> - Show quoted text -

The t.  Oughtn't there be a run on Guido's name more often than is?

You -could- write:

x[ slice(0)+slice(2,6) ]

where slice would be an 'autochaining' type under a syntax.  Fine for
slices, not for logic.

x[ b1+And+b2+Or+b3 ]

would also register as b1 and b2 or b3, which really quickly rises on
the wheel again, er, um, crawls up the spout.

Would you be happy with x[ '0,2:6' ], necessarily in quotes?  With two
punctuation marks you couldn't get much farther in money than Python
does today.

x[ '0 2:6' ]
-> x.__getitem__( x, '0 2:6' )
-> '0 2:6'.split( )
-> x.__getslice__( x, slice( 0 ) )
... + x.__getslice__( x, slice( 2, 6 ) )

However, it's not clear it's trivial to overwrite a built-in type's
__getitem__!


From marlin_rowley at hotmail.com  Thu May 22 17:24:11 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 22 May 2008 16:24:11 -0500
Subject: How do I make a copy of my class object?
Message-ID: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>

All:
 
I have a class object which has the usual data members and functions.  I'm trying to make a copy of this class (which includes wx.Bitmap objects) but deepcopy() doesn't seem to work.  How would I do this?
 
-M
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
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From andreas.tawn at ubisoft.com  Thu May 15 12:33:21 2008
From: andreas.tawn at ubisoft.com (Andreas Tawn)
Date: Thu, 15 May 2008 18:33:21 +0200
Subject: file open/read/name etc, not working
In-Reply-To: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <8AEDA5E3386EA742B8C24C95FF0C75800403F774@PDC-MAIL3.ubisoft.org>

>import os
>
>print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
>d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
>d.readline()
>
>returns true in the shell but prints no text even though the document
>contains text.
>
>d.name returns nothing, d.name() raises an error.
>--
>http://mail.python.org/mailman/listinfo/python-list

Try...

import os

print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
for line in d:
	print line


And I'm guessing that's a typo in flim.txt?

Cheers,

Drea


From arnodel at googlemail.com  Tue May 27 14:06:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 19:06:51 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<mailman.1660.1211910251.12834.python-list@python.org>
Message-ID: <m21w3n62pw.fsf@googlemail.com>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnjsal at nospamgmail.com> wrote:
>> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
>> news:69g605F2v4102U2 at mid.uni-berlin.de...
>>> After being corrected about missing the construction of a None-containing
>>> list, one needs of course to think about the waste of resources, as a
>>> possible result-list is created in any case.
>>
>> Yeah, I was already aware of the list of Nones, which is why I asked. Simply
>> typing the list comprehension without an assignment just *looked* wrong,
>> too.
>
> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

This is crazy!

-- 
Arnaud


From deets at nospam.web.de  Fri May 16 08:26:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 14:26:05 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
Message-ID: <695crbF303jk4U1@mid.uni-berlin.de>

> 
>  Did you consider gzipping your XML (or YAML) packets ? Would the
> transfer time be acceptable in this case ?

That would add even more to the overhead of transcoding the 
transportlayer. Switching from XMLRPC to a json-based protocol reduced 
in a project of mine reduced the overhead 10-20fold - mainly because of 
reduced size and parsing efforts.

Diez


From ppearson at nowhere.invalid  Thu May  1 16:54:08 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Thu, 01 May 2008 15:54:08 -0500
Subject: Getting started with pyvtk
Message-ID: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>

I'm trying to get started with pyvtk, the Python interface
to the Visualization Toolkit, but there's obviously
something important that I haven't figured out after an
embarrassingly long morning of googling around.  When I run
sample pyvtk code (example1.py, from
http://cens.ioc.ee/cgi-bin/viewcvs.cgi/python/pyvtk/examples/example1.py),
nothing graphical happens, but some text files appear named
example1.vtk and example1b.vtk.  Guessing that I need to
feed one of these to vtk, I tried "vtk <example1.vtk" and
"vtk example1.vtk", but those result in (different) error
messages that I think mean example1.vtk is not the language
that vtk expects.  Simply running "vtk" (apparently 4.0)
gets a prompt that has no help command, and "man vtk" just
tells me it's like "wish", and "man wish" doesn't address
what to do with a vtk file.

What key piece am I missing?

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From pavlovevidence at gmail.com  Thu May 22 00:22:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 21:22:29 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com> 
	<a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>
Message-ID: <39a12039-bfc9-4587-81ab-eb070cd51133@t54g2000hsg.googlegroups.com>

On May 21, 11:27 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 21, 7:01 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>
> > The crucial thing is not to slow down the calculations with useless
> > bells and whistles.
>
> Are you running your simulations on a system that does or does not
> support the "useless bell and whistle" of correct rounding?  If not,
> how do you prevent regression towards 0?

The "useless bell and whistle" is switching to multiprecision.

I'm not sure whether our hardware has a rounding bias or not but I
doubt it would matter if it did.


> For example, one of the things that caused the PS3 to be in 3rd place
> behind the Wii and XBox 360 is that to save a cycle or two, the PS3
> cell core does not support rounding of single precision results -- it
> truncates them towards 0.  That led to horrible single-pixel errors in
> the early demos I saw, which in term helped contribute to game release
> delays, which has turned into a major disappointment for Sony.

And you believe that automatically detecting rounding errors and
switching to multi-precision in software would have saved Sony all
this?


Carl Banks


From aisaac at american.edu  Thu May 29 18:54:41 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 22:54:41 GMT
Subject: code of a function
In-Reply-To: <mailman.1741.1212074713.12834.python-list@python.org>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org>
Message-ID: <RuG%j.37511$3j.21433@trnddc05>

Anand Patil wrote:
> If you're using IPython, you can do svd?? . 


http://www.scipy.org/doc/numpy_api_docs/numpy.linalg.linalg.html

hth,
Alan Isaac


From danb_83 at yahoo.com  Tue May 27 19:04:55 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 27 May 2008 16:04:55 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>

On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian
> notation, but just for when it's appropriate.

pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.


From arnodel at googlemail.com  Tue May 27 03:00:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 08:00:54 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
	<98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>
Message-ID: <m28wxw5izd.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> I used Arnaud's suggestion with a few minor tweaks, as follows:
>
> #-----
> fset = frozenset
> s0 = fset([1])
> s1 = fset([1,2])
> s2 = fset([2])
>
> # let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
> S = set([s1,s2])
>
> # X is the "domain", C is the set of complements in X of elements of
> S
> X = set()
> for s in S:
>     X |= s
> print "s0 is ", s0
> print "S is ", S
> print "X is ", X
>
> C = set(fset(X - s) for s in S if fset(X-s))
> print "C is ", C
>
> # Find the "fibers" at each element x of s0.
> # A fiber at x is the set of all s in S or C that contain x
> from collections import defaultdict
> fibers = defaultdict(list)
> for s in S | C:
>     for x in s & s0:
>         fibers[x].append(s)
> print "fibers are ", fibers
>
> # Find the "seeds" at each x in s0.
> # A seed at x is the set of all elements contained in all s in the
> fiber at x.
> # Intutively, a seed at x is the smallest set containing x that can
> be
> # built from S
> seeds = set()
> for F in fibers.itervalues():
>     seeds &= set(F)
Change this to:

seeds = []
for F in fibers.itervalues():
    seed = X
    for f in F:
        seed &= f
    seeds.append(seed)

And the whole thing should work

HTH

> print 'seeds are ', seeds
>
> # Now we know if there is a solution:
> sol = set()
> for s in seeds:
>     sol |= s
> if sol != s0:
>     print "No solution"
> else:
>     print "Solution: union(intersection(fibers[x]) for x in s0)"
> #-----
>
> yields this:
>
> s0 is frozenset([1])
> S is  set([frozenset([1, 2]), frozenset([2])])
> X is  set([1, 2])
> C is  set([frozenset([1])])
> fibers are  defaultdict(<type 'list'>, {1: [frozenset([1, 2]),
> frozenset([1])]})
> seeds are  set([])
> No solution
>
>
> I follow your logic up to the point of the "seeds," where I get a bit
> confused. Thanks much! for the idea, I'm going to keep thinking about
> it. Any other ideas are *most* welcome. -- PB.

-- 
Arnaud


From torriem at gmail.com  Thu May  1 12:49:41 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 10:49:41 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
Message-ID: <4819F4A5.4010302@gmail.com>

Jens wrote:
> - Why is it, when primitive data types seem to be objects (similar to
> javascript), that type casting is done through build-in functions
> rather than methods, e.g. String.toInt('5') or '5'.toInt() or x =
> Integer.fromString('5').

Mainly because it's much cleaner to do it the python way (absolutely
explicit), and just as clear or clearer what you are intending to do.
Digging a little deeper, you'll find that the built-in function "str,"
for example, actually calls object.__str__().  This is nice because it
allows any object class to define that method and have it work with
str() in a manner consistent across python.  It preserves some amount of
uniformity.

The second example, x = Integer.fromString('5') demonstrates a huge
weakness in Java.  In python, rather than asking an integer object to
convert from a limited selection of other objects, python works the
other way, asking objects to convert themselves to integers (if they
can).  We don't worry about the size of integers, since python's
integers are auto-sizing.  So any object that implements the __int__()
method can be used with the classic "int()" built-in function.  The same
goes for __float__ and float().

Little things like this really make me happy about how python does
things generally.  I think much of how Java works with Integer and
String (as you describe above) is because Java has primitive types
(which aren't objects at all) and then boxed objects around the
primitive types.  Python eliminates this idea, and makes everything,
even "simple" types objects.

Now sure python could just say always call the "int()" or "float()" or
"str()" method on objects to produce those respective conversions.  But
using a combination of a built-in language function and a specialized,
reserved class method name, allows a lot of flexibility without
infringing on the programmer's need to use method names like "int,
float, or str" if he or she so desired.



From mattheww at chiark.greenend.org.uk  Wed May 14 12:58:41 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 14 May 2008 17:58:41 +0100 (BST)
Subject: Purpose of operator package
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
	<mailman.1085.1210718354.12834.python-list@python.org>
	<iwpWj.1763$r82.1074@nlpi069.nbdc.sbc.com>
Message-ID: <TSF*qAScs@news.chiark.greenend.org.uk>

I V  <ivlenin at gmail.com> wrote:
> I hadn't heard of operator.truth before. Does it do anything different 
> from bool(x) ?

Not really. It was occasionally useful before the bool type existed;
now it's just a leftover.

-M-


From anna.k.lawrence at baesystems.com  Fri May  9 14:33:31 2008
From: anna.k.lawrence at baesystems.com (Lawrence, Anna K (US SSA))
Date: Fri, 9 May 2008 11:33:31 -0700
Subject: Not able to get utf8 encoded string into a document
Message-ID: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>

Hi all,

 

This is my first post and I'm really at a loss for how to fix my
problem, so I really hope someone can help me out.

 

I am working on a web application using Pylons .0.9.6, SQLAlchemy 0.4.4,
MySQLdb 1.2.2 and Python 2.4.4.

 

We want to use utf8 encoding throughout and as far as I can see
everything is set properly between components and I've got a
sitecustomize.py in my site-packages directory of python set to utf8 as
well.  Everything is stored properly in the database and displays nicely
in the app.  However, when I try to take a string that is coming out of
the database and export it to a Word document, no amount of
encoding/decoding will make the Word doc display properly.

 

Since I'm on a Windows machine, my default locale is cp437.  Is this the
reason?

 

Is there something that needs to be set that I'm missing?  Any help
would be greatly appreciated.

 

Thanks,

Anna

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From martin at v.loewis.de  Fri May 23 13:38:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 23 May 2008 19:38:07 +0200
Subject: array of 64-bit ints?
In-Reply-To: <g16tub$qoj$1@rumours.uwaterloo.ca>
References: <g16tub$qoj$1@rumours.uwaterloo.ca>
Message-ID: <483700FF.1020704@v.loewis.de>

> Is it possible to have an array of 64-bit-ints using the standard Python 
> array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
> "long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
> "long long int" or "size_t".  However, according to the Python array 
> documentation, arrays of "size_t" or "long long int" are not available.

No, it's not possible.

Regards,
Martin


From deets at nospam.web.de  Fri May 23 06:50:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 12:50:42 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <4836994e$0$11625$607ed4bc@cv.net>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
Message-ID: <69nls3F344g2cU1@mid.uni-berlin.de>

Andrew Lee schrieb:
> Diez B. Roggisch wrote:
>> Jimmy schrieb:
>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>> Jimmy wrote:
>>>>> Hi to all
>>>>> python now has grown to a versatile language that can
>>>>> accomplish tasks for many different purposes. However,
>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>> So I am wondering if python can do some kernel coding that
>>>>> used to be the private garden of C/C++. For example, can python
>>>>> intercept the input of keyboard on a system level? someone told me
>>>>> it's a kernel thing, isn't it?
>>>> http://wiki.python.org/moin/elmer
>>>
>>> well, straightly speaking, how can I know a key is pressed on a system-
>>> level if
>>> using python?
>>
>> What has that todo with kernel programming? You can use e.g. pygame to 
>> get keystrokes. Or under linux, read (if you are root) the keyboard 
>> input file - I've done that to support several keyboards attached to a 
>> machine.
>>
>> And the original question: no, python can't be used as kernel 
>> programming language. Amongst other reasons, performance & the GIL 
>> prevent that.
>>
>> Diez
> 
> http://www.kernel-panic.it/programming/py-pf/
> 
> Of course you can code kernel routines in Python -- you are just calling 
> the underlying C interface.  The GIL means you have to manage 
> threadsafety on your own -- it doesn't imply kernel programming can not 
> be done.

I understood the OP's question as "can one program kernelspace routines 
in python". Which I don't think is possible. And I don't see how py-pf 
does that either.

Diez


From sebastian.noack at googlemail.com  Tue May 27 04:51:47 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Tue, 27 May 2008 01:51:47 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
Message-ID: <414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>

I have written a FileWrapper class as workaround, which works for me
(see the code below). The FileWrapper object holds an internal file-
like object and maps its attributes, but prevents the user (in this
case tarfile) from closing the internal file, so I can still access
StringIO's content after closing the TarFile object.

But this should not be required to create in memory tar files. It is
definitely a bug, that TarFile closes external file objects passed to
tarfile.open, when closing the TarFile object. The code which opens a
file is also responsible for closing it.

Regards
Sebastian Noack


#
# File: StringIO-tarfile.py
#
#!/usr/bin/env python

from StringIO import StringIO
import tarfile
import sys

class FileWrapper(object):
	def __init__(self, fileobj):
		self.file = fileobj
		self.closed = fileobj.closed

	def __getattr__(self, name):
		# Raise AttributeError, if it isn't a file attribute.
		if name not in dir(file):
			raise AttributeError(name)

		# Get the attribute of the internal file object.
		value = getattr(self.file, name)

		# Raise a ValueError, if the attribute is callable (e.g. an instance
		# method) and the FileWrapper is closed.
		if callable(value) and self.closed:
			raise ValueError('I/O operation on closed file')
		return value

	def close(self):
		self.closed = True

def create_tar_file(filenames, fileobj, mode):
	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
	for f in filenames:
		tar_file.add(f)
	tar_file.close()

if __name__ == '__main__':
	files = sys.argv[1:]
	modes = ['w%s%s' % (x, y) for x in (':', '|') for y in ('', 'gz',
'bz2')]

	for mode in modes:
		ext = mode.replace('w|', '-pipe.tar.').replace('w:',
'.tar.').rstrip('.')
		# StringIO test.
		stream = FileWrapper(StringIO())
		create_tar_file(files, stream, mode)
		fd = open('StringIO%s' % ext, 'w')
		fd.write(stream.file.getvalue())
		stream.file.close()
		fd.close()

		# file object test.
		fd = open('file%s' % ext, 'w')
		create_tar_file(files, fd, mode)


From heikki at osafoundation.org  Fri May  2 15:42:33 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 12:42:33 -0700
Subject: Python and SOAP status
In-Reply-To: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>

Sorry, suds link should have been https://fedorahosted.org/suds

-- 
  Heikki Toivonen


From bronger at physik.rwth-aachen.de  Thu May  1 02:09:14 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 08:09:14 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
	<6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>
Message-ID: <87abjablo5.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

>> I didn't look it up myself, but maybe a __init__.py file is missing
>> so that it can be recognised as a package.
>
> No, every single one (S, B, and W) has its own __init__.py
>
>> >> > in u.py Python gives "ImportError: No module named S".
>>
>> >> A silly question: is the directory that contains "S" in PYTHONPATH or
>> >> in sys.path?
>>
>> > It's in sys.path.
>>
>> "S" or its parent directory?
>
> I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?

Try r'C:\Users\Myname'.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From darcy at druid.net  Fri May  2 10:15:08 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 10:15:08 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87k5iczvdy.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
Message-ID: <20080502101508.a1562849.darcy@druid.net>

On Fri, 02 May 2008 23:30:01 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> The OP was asking why people prefer on over the other. My answer is
> that I prefer specifying "give me the default OS Python" because
> anything not installed by the OS is to non-standardised for me to
> worry about.

As someone else pointed out, not all the world is Linux.  So your
version of Linux (I'm not sure whether it is true for all versions or
not) delivers Python as part of the OS.  That is simply not true of the
whole world.  Some OS distributions have an adjunct facility for
installing packages but they are not part of the OS.  Some systems
don't even have that and people must download packages such as Python
and install them manually.  Even on Linux there are people who won't
install binaries and use NetBSD's pkgsrc instead.  Clearly that cannot
install into /usr/bin since it is not part of the OS.

Certainly #! /usr/bin/python is fine if you never expect your software
to run outside of your own little corner of the world but you asked why
people prefer the env version and the answer is that we want to write
software that runs everywhere that Python runs.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From yves at zioup.com  Fri May  2 12:10:34 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 16:10:34 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87fxt0zs92.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <_1HSj.237347$pM4.42390@pd7urf1no>

Thanks everybody, I didn't mean to start a flamewar...
I do get it now, it's whatever python is in the path, vs. the specific one 
you're pointing to.

Ben Finney wrote:

> 
> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.
> 

And I have to admit, I prefer specifying the version (full path) because I 
have run into too many problem when users have different PATHs and end up 
running different version of an interpreter.

Yves.
--
http://www.SollerS.ca


From kyosohma at gmail.com  Fri May 23 09:29:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 06:29:16 -0700 (PDT)
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
Message-ID: <9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>

On May 23, 8:24?am, Gandalf <goldn... at gmail.com> wrote:
> I try to reach a specific wx StaticText element's text and to change
> it by clicking on a button
>
> now let's say the this is my element:
>
> wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>
> And this is my EVT_BUTTON bind function :
>
> def OnClick(event):
>
> which code shude i enter to change "hello" to "goodbay"?
>
> thanks


You're probably looking for SetLabel(). So if you do something like
this to instantiate the StaticText:

self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
style=wx.ALIGN_CENTRE)

Then you can change your text by adding this to your OnClick event
handler:

self.myText.SetLabel("goodbye")

Have fun! And remember, there's a great wxPython mailing list too:

http://www.wxpython.org/maillist.php

Mike


From wizzardx at gmail.com  Sun May  4 14:14:50 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:14:50 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <18c1e6480805041114j1b3448dfj2b86fe3144d77f9c@mail.gmail.com>

On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.dekel at gmail.com> wrote:
> Hi
>  I am trying to create an application that uses some form of input to
>  create a midi file.
>  I would like for this to be a 'real time' process. In other words, I
>  want to be able to begin playing the midi file before I finish writing
>  it, and continue writing as it plays.

Have you tried the MIDI libraries listed on this page?

http://wiki.python.org/moin/PythonInMusic

David.


From wizzardx at gmail.com  Thu May  8 09:36:31 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 15:36:31 +0200
Subject: Parsing Email 'References' header.
In-Reply-To: <18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>
References: <4822F7B6.2000403@gmail.com>
	<18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>
Message-ID: <18c1e6480805080636i590f4a13t2179aac67433e8a1@mail.gmail.com>

>
>  "<.*>(<.*?>)"
>

Doesn't work if there is only one e-mail address:

Here's another one:

"<[^<]+>$"


From hat at se-162.se.wtb.tue.nl  Fri May 16 03:45:37 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 09:45:37 +0200
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>
Message-ID: <slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Venkatraman.S. <venkat83 at gmail.com> wrote:
> Or a better example would be:

Indeed, this is concrete enough to make some suggestions.

> I have the params in a config file and import this module:
> myconfig.py
> a=10
> b=30
> c=31
> d=40

The big problem imho with coding such stuff directly in Python is that you have
no way to extract the data from the code to display it to your users without
exposing them to Python code.

Why not instead throw this in a ConfigParser file like below, and load the data
values from it (each time they have changed?)

[score]
a=10
b=30
c=31
d=40

By picking better names, the config gets much more readable.

The big advantage here is that a config file is something readable and editable
without appearing it to be Python.
If this is too low level for your users, you can use it as a data exchange
format between the processing application and the frontend application where
users can change the values.

> import myconfig
> def checkCutoff(self,up,down):
>        .............do some processing........
>        if (a <= score <= b):
>                 result="Bad"
>        elif (c <= score <= d):
>                 result="Good"
>        .............do some processing........
>        return result
>
> Now when i 'manually' make some changes to the value of a,b,c,d then
> the the checkCutoff func should refer to the new values.

Maybe reload the file each time you run the program?


Sincerely,
Albert


From notnorwegian at yahoo.se  Sun May 25 18:49:16 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 15:49:16 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
Message-ID: <a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>

On May 25, 9:32?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sun, 25 May 2008 00:10:45 -0700, notnorwegian wrote:
> > sets dont seem to be so good because there is no way to iterate them.
>
> Err:
>
> In [82]: for x in set(['a', 'b', 'c']):
> ? ?....: ? ? print x
> ? ?....:
> a
> c
> b
>
> Ciao,
> ? ? ? ? Marc 'BlackJack' Rintsch


i meant like set[pos], not iterate but access a specific position in
the set.

now i have to do:
s = toSet.pop()
toSet.add(s)

if i want to get the url of the next item in a set, how would i do
that?
i can do this with a list:

def scrapeSitesX(startAddress, toList, listPos):
return scrapeSites(toList[listPos], toList, listPos+1)
to use recursion with a list.
i can work around that but it doesnt get as elegant.


From d3vvnull at gmail.com  Fri May 23 00:50:27 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 22 May 2008 23:50:27 -0500
Subject: php vs python
In-Reply-To: <UTrZj.2635$772.1119@bignews2.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
	<UTrZj.2635$772.1119@bignews2.bellsouth.net>
Message-ID: <170543c70805222150j14365fc6hc96b3948c339d68a@mail.gmail.com>

I used python to generate php code. But that was before I knew what vast
troves of python web frameworks there were. :)

On Thu, May 22, 2008 at 11:40 PM, inhahe <inhahe at gmail.com> wrote:

>
> > PHP can do that.  There are also a number of templating engines
> > available.  The nice thing about PHP is you have a choice.
>
> i just meant that php is sort of invented to combine html and code, so if
> you use python instead you should use a templating engine.  but i suppose
> it's useful for php too.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From byte8bits at gmail.com  Thu May 22 11:45:06 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 22 May 2008 11:45:06 -0400
Subject: problem boost::python::import
In-Reply-To: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>
References: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>
Message-ID: <g144en$3as$1@solaris.cc.vt.edu>

Fr?d?ric Degraeve wrote:
> Hello,
> 
> I tried this code with vs7-8 and boost1.34.1-1.35.0 and my python is a
> 2.4......

Try the boost users list:

To subscribe or unsubscribe via the World Wide Web, visit 
http://lists.boost.org/mailman/listinfo.cgi/boost-users



From castironpi at gmail.com  Tue May 13 10:16:27 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:16:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com> 
	<fb6f276c-24f9-4339-b814-5f2c4f331c59@l17g2000pri.googlegroups.com>
Message-ID: <2108ecb8-ba27-4c97-8f9f-adfe451e10fb@56g2000hsm.googlegroups.com>

On May 13, 9:05?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 13, 7:44?am, castiro... at gmail.com wrote:
>
> > I am not convinced that the colorspace occupies three dimensions necessarily.
>
> Apparently there are some people -- called tetrachromats -- who can
> see color in four dimensions. ?They have extra sets of cones in their
> retinas containing a different photopigment. ?So, the dimensions of
> color appear to be an artifact of our visual systems, and not inherent
> in the colors themselves which are linear (one-dimensional) in
> frequency. ?http://en.wikipedia.org/wiki/Tetrachromacy

My conspiracy theorists know too much.  They would question that
mathematical claim of science, that retinas only detect one dimension
of one force.  Are we asking if something like that is fundamental to
life?  I have been very sceptical about emperical claims, especially
since I just try to render stuff and play Tron.


From sturlamolden at yahoo.no  Fri May 30 06:21:37 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Fri, 30 May 2008 03:21:37 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <63757633-e3d7-4d5b-b1c4-160987913990@34g2000hsh.googlegroups.com>

On May 29, 6:07 pm, allendow... at gmail.com wrote:

> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.

You should use new-style classes. It is the default in Python 2.6 and
the only option in 3.0. These releases will be out before your book is
on the market.



From alex_fainshtein at netzero.net  Fri May  2 17:29:57 2008
From: alex_fainshtein at netzero.net (Alex Fainshtein)
Date: Fri, 2 May 2008 14:29:57 -0700
Subject: 'property' builtin does not work for me
Message-ID: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>

Question: what I am doing wrong? Here, I am defining class with property
member:

class Test:

    def getter(self):
        print "Getter called."
        return 'a'

    def setter(self, val):
        print "Setter called."

    prop = property(getter, setter)

Then testing it:

>>> t = Test()
>>> t.prop
Getter called.
'a'
>>> t.prop = 'b'
>>> t.prop
'b'
>>>

As you see, getter works properly. But when assigning to property, setter is
not called, as I would expect. prop is simply replaced with whatever is
assigned and ceased being a property.
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From benjamin.kaplan at case.edu  Sat May 24 16:57:39 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sat, 24 May 2008 16:57:39 -0400
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com>

On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzyman at gmail.com> wrote:

> On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au<bignose%2Bhates-s... at benfinney.id.au>
> >
> wrote:
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
> >
> > From whom are you trying to hide your attributes?
>
> Actually, 'data hiding', although vastly overused by the static crowd
> can be a reasonable thing to want.
>
> For example, at Resolver Systems we expose the spreadsheet object
> model to our users. It hasa public, documented, API - plus a host of
> undocumented internally used methods.
>
> We would really *much* rather hide these, because anything our
> customers start using (whether documented or not) we will probably
> have to continue supporting and maintaining.
>
> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke their
> spreadsheet code by changing your API.
>

It apparently works for Sun Microsystems. They do that with a whole bunch of
packages in Java, and Java does allow data hiding.

http://java.sun.com/products/jdk/faq/faq-sun-packages.html


>
> You can make members truly private by proxying, but it is a bit
> ungainly.
>
> Michael Foord
> http://www.ironpythoninaction.com/
>
>
> >
> > In Python, the philosophy "we're all consenting adults here" applies.
> > You shouldn't pretend to know, at the time you write it, all the uses
> > to which your code will be put. Barriers such as enforced "private"
> > attributes will only cause resentment when people, despite your
> > anticipations, *need* to access them and are then forced to hack their
> > way around them.
> >
> > If you want the users of your code to know that an attribute should
> > not be used as a public API for the code, use the convention of naming
> > the attribute with a single leading underscore. This is a string
> > signal that the attribute is part of the implementation, not the
> > interface. The reader is then on notice that they should not rely on
> > that attribute; but they are not *prohibited* from using it if
> > necessary to their ends.
> >
> > > Python advertises himself as a full OOP language, but why does it
> > > miss one of the basic principles of OOP?
> >
> > Who taught you that enforced restrictions on attribute access was a
> > "basic principle" of OO?
> >
> > Perhaps you're confusing the "encapsulation" and "abstraction"
> > principles for enforced access restrictions; they're not.
> >
> > > Will it ever be added to python?
> >
> > I hope not.
> >
> > --
> >  \            "Why was I with her? She reminds me of you. In fact, she |
> >   `\             reminds me more of you than you do!"  -- Groucho Marx |
> > _o__)                                                                  |
> > Ben Finney
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bbxx789_05ss at yahoo.com  Sat May 10 22:37:05 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 10 May 2008 19:37:05 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <87c642fa-2a6c-43c5-a812-27924e689889@34g2000hsh.googlegroups.com>

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>

x = range(10)
print x

--output:--
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]


From arnodel at googlemail.com  Thu May 29 15:12:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 29 May 2008 20:12:15 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
Message-ID: <m2d4n43oxc.fsf@googlemail.com>

Jason <tenax.raccoon at gmail.com> writes:

> On May 29, 10:07 am, allendow... at gmail.com wrote:
>> Hi All,
>>
>> I am working on a revised edition of How To Think Like a Computer
>> Scientist,
>> which is going to be called Think Python.  It will be published by
>> Cambridge
>> University Press, but there will still be a free version under the GNU
>> FDL.
>>
>> You can see the latest version at thinkpython.com; I am revising now,
>> so
>> I welcome all comments, suggestions, corrections, etc.
>>
>> Anyway, I am posting to ask about the current status of new style
>> classes.
>> I am planning to present only one style in the book, because the
>> differences
>> between them don't matter for anything I am doing in the book.
>>
>> The current edition of the book presents old style classes.  I am
>> considering
>> switching to new style classes on the assumption that this should be
>> the default
>> choice for new programs.  The drawback is that a lot of the online
>> documentation
>> still uses old style classes.
>>
>> Thanks for any guidance you can provide.
>>
>> Cheers,
>> Allen
>
> I've got Python 3.0 alpha 2.  In this version, it looks like you can
> define classes in either the old style or new style.  (I snipped the
> top line a bit in the following example):
>
> Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
> Type "help", "copyright", "credits" or "license"
>>>> class one(object): pass
> ...
>>>> class two: pass
> ...
>>>> two
> <class '__main__.two'>
>>>> one
> <class '__main__.one'>
>>>> type(one)
> <type 'type'>
>>>> type(two)
> <type 'type'>
>>>>

Note that you can get the same behaviour in Python 2.2+ by setting the
global variable __metaclass__ to type:

marigold:~ arno$ python
Python 2.5.1 (r251:54863, Jan 17 2008, 19:35:17) 
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> __metaclass__ = type
>>> class Foo: pass
... 
>>> type(Foo)
<type 'type'>
>>> 

-- 
Arnaud


From daveparker at flamingthunder.com  Wed May 21 17:39:43 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 14:39:43 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
Message-ID: <bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>

On May 21, 3:19?pm, "Dan Upton" <up... at virginia.edu> wrote:
> The fact is, sometimes it's better to get it fast and be good enough,
> where you can use whatever methods you want to deal with rounding
> error accumulation.

I agree.

I also think that the precision/speed tradeoff should be under user
control -- not at the whim of the compiler writer.  So, for example,
if a user says:

      Set realdecimaldigits to 10.

then it's okay to use hardware double precision, but if they say:

      Set realdecimaldigits to 100.

then it's not.  The user should always be able to specify the
precision and the rounding mode, and the program should always provide
correct results to those specifications.


From vivainio at gmail.com  Mon May  5 14:41:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:41:01 GMT
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
	<slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>
	<mailman.608.1210012330.12834.python-list@python.org>
Message-ID: <lk2ozj9g.fsf@gmail.com>

Max Erickson <maxerickson at gmail.com> writes:

> The killer application for ISBN lookup on Amazon is checking prices 
> while in the bookstore. Being able to email a photo from your phone  
> and then getting an email with the Amazon price in response would be 
> way easier than typing the isbn into Google or whatever.

Yeah, or just create a S60 python app to do it directly. Basically,
just put up a web service somewhere that allows pushing an image of
the barcode and returns the lowest price for that item, and the PyS60
app will be done in a day.


From wizzardx at gmail.com  Mon May  5 09:09:49 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 15:09:49 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
Message-ID: <18c1e6480805050609n7a65d67amdc83c2b89f8f2271@mail.gmail.com>

Hi Vlasta.

Don't have time to reply to your mail in detail now. Will do so later.

Have you tried the eGenix text tagging library? It sounds to me that
this is exactly what you need:

http://www.egenix.com/products/python/mxBase/mxTextTools/

Disclaimer: I've never actually used this library ;-)

David.


From mnordhoff at mattnordhoff.com  Sun May 25 01:19:49 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sun, 25 May 2008 05:19:49 +0000
Subject: module import problem
In-Reply-To: <200805242359.27995.prudek@bvx.cz>
References: <200805242359.27995.prudek@bvx.cz>
Message-ID: <4838F6F5.5070409@mattnordhoff.com>

Milos Prudek wrote:
> I have a Kubuntu upgrade script that fails to run:
> 
> File "/tmp/kde-root//DistUpgradeFetcherCore.py", 
> line 34, in <module>
> import GnuPGInterface
> ImportError
> No module named GnuPGInterface
> 
> I got a folder /usr/share/python-support/python-gnupginterface with 
> a "GnuPGInterface.py" but no __init__.py.
> 
> In python command line, print sys.path shows that /usr/share/python-support/ 
> is not among python paths.
> 
> If I cd into /usr/share/python-support/python-gnupginterface and launch Python 
> I can "import GnuPGInterface". But when I run DistUpgradeFetcherCore.py in 
> that folder it always fails with No module named GnuPGInterface.
> 
>  I do not know much about setting python path. 

This doesn't help solve your problem, but /usr/share/python-support
doesn't need to be in Python's path because python-support puts symlinks
to it in /usr/share/python*/site-packages.
-- 


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 09:45:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 15:45:38 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
Message-ID: <482d9001$0$24452$426a74cc@news.free.fr>

globalrev a ?crit :
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
(snip)
>>> cust1 = customer.__init__('12',['1','435','2332'])
>> __init__ is automagically called on instanciation, so you don't have to
>> call it yourself. And FWIW, your __init__ returns None.
> 
> what should init return normally?

None. Your __init__ is fine, the problem is with the call. To 
instanciate a class, you call the class object itself, passing it the 
arguments awaited by __init__, ie:


cust1 = Customer('12', ['1', '435', '2332'])


From victorsubervi at gmail.com  Fri May  2 09:38:34 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Fri, 2 May 2008 08:38:34 -0500
Subject: Custom Classes?
In-Reply-To: <1209729679.6589.23.camel@jcd-desktop>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
Message-ID: <4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>

Thank you for your patience. I apologize for so many errors. Also,
apparently your email client renders those double-spaces whereas mine does
not. Hopefully the below is better:

#!/usr/bin/python

import MySQLdb
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()

pic = "pic1"
w = 20
x = 0
d = 6
y = 1
getpic = "getpic" + str(w) + ".py"
try:
  os.remove(getpic)
except:
  pass
code = """
#!/usr/local/bin/python
import cgitb; cgitb.enable()
import MySQLdb
import cgi
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()
form = cgi.FieldStorage()
picid = int(form["id"].value)
x = int(form["x"].value)
pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
pic = pics[x]
db = MySQLdb.connect(host, user, passwd, db)
cursor= db.cursor()
sql = "select %s from products where id='%s';" % (pic, str(picid))
cursor.execute(sql)
content = cursor.fetchall()[0][0].tostring()
cursor.close()
print 'Content-Type: image/jpeg'
print
print content
"""
script = open(getpic, "w")
script.write(code)
# print '<td><input type="hidden" name="%s" value="%s" />' % (str(x),  pic)
# print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d, y)
print '<img src="getpic20.py?id=6&x=1">\n'



Now, on those last 3 lines, I am having trouble with this error being thrown
that I don?t understand:
ValueError: unpack list of wrong size
If I surf to the given url, the image appears! So what gives?? Furthermore,
the code works just fine from where it was lifted.
TIA,
Victor
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From arnodel at googlemail.com  Mon May 19 17:27:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 22:27:06 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
Message-ID: <m2k5hq7zo5.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 19, 11:04?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Paul McGuire <pt... at austin.rr.com> writes:
>>
>> [...]
>>
>> Could you use it as a decoratore instead?
>>
>> integer = Word("0123456789")
>>
>> @integer.setParseAction
>> def parse_integer(tokens):
>> ? ? return int(tokens[0])
>>
>> I could make your grammar clearer, because you don't mix it with
>> processing code... and no need for lambdas!
>>
>> --
>> Arnaud
>
> What a sexy little idiom!  You could really apply this to any API
> method that accepts a callable as a single argument, and pyparsing
> actually has several of these:
>
> setParseAction
> addParseAction
> setFailAction
> setDebugActions
>
> (Unfortunately, setDebugActions requires 3 callables for its arguments
> - one to be run when an expression is about to be parsed, one to be
> run after parsing is complete, and one to be run if the expression
> fails to be parsed.  So setDebugActions can't be used in this
> decorator manner.)
>
> Using these methods as decorators deviates from the typical decorator
> usage model as I understand it - instead of wrapping the provided
> function within some enclosing setup/teardown code (like lock/unlock,
> or open-file/close-file, or begin-transaction/commit-transaction), and
> then returning the created wrapper function, the decorator usage you
> propose is one in which the decorator uses the provided function with
> some side-effect (such as setting a property), but then just returns
> the original function.

I humbly think this is a very good use of decorators; it is one that I
frequently take advantage of and until I read this I had never thought
of it as deviant :).  After all, Python is not a functional language,
functions have side-effects and that's that.

In a way it is more basic than the 'typical' use, i.e.

    # Typical use; mutates defined function 
    @staticmethod
    def foo(bar, baz)...

is shorthand for

    def foo(bar, baz)...
    foo = staticmethod(foo)

Whereas

    # Deviant use; leaves function untouched
    @register
    def foo(bar, baz)...

is shorthand for

    def foo(bar, baz)...
    register(foo)

I am not claiming that it should be a common decorator idiom, only
that I am comfortable with it and find it useful.

> By returning the original function, we could stack decorators so
> that multiple expressions could share the same parse action:
>
> @articleTitle.setParseAction
> @movieTitle.setParseAction
> @bookTitle.setParseAction
> def upcase_title(tokens):
>     return " ".join( t.title() for t in tokens )
>
> Here is where I have something of a hitch, with the way pyparsing
> implements most setXXX methods.  setParseAction already returns a
> value, and the value returned is self.  If you have any Smalltalk
> background, this will seem familiar to you.  (Not that I was ever a
> big-time Smalltalk coder, but this was one language idiom that you
> learned on Day 0.5 or you were lost forever.)  This makes it easy to
> chain together a constructor and multiple property setters into a
> single expression:
>
> timestamp = Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d)
> {2}").setParseAction(convertTimeStamp).leaveWhitespace().setDebug()

I am not a user of pyparsing (yet!), so my comment is completely
uninformed, but I feel that what is gained in brevity by writing it
like this, may be lost in clarity because separate notions are put
together (parsing, processing, debugging).  But if I understand
correctly, I would be able to rewrite this as:

# Grammar section
timestamp =  Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d){2}")

# Processing section
timestamp.setParseAction(convertTimeStamp)
timestamp.leaveWhitespace() # I'm not sure what this does!

# Debugging section
timestamp.setDebug()

OK, now I understand what my problem is: 

    - your existing setXXX methods mutate self and return it, thus
      breaking the quasi-rule that if you mutate something, don't
      return it (c.f. list.sort, etc);

    - your proposed 'decorator-friendly' setXXX methods mutate self
      and return their argument just to satisfy the
      decorator-friendliness constraint, but in spirit they return
      nothing.

This is just a train of thought, and I hope that you won't take this
the wrong way.  I am arguing for the pleasure of it, and I am happy to
lose the argument :)
 
> In the case where we have a single parse action shared by multiple
> expressions, we have to fall back to:
>
> def upcase_title(tokens):
>     return " ".join( t.title() for t in tokens )
> articleTitle.setParseAction(upcase_title)
> movieTitle.setParseAction(upcase_title)
> bookTitle.setParseAction(upcase_title)
>
> But, now that I've looked at this for a while, I may fall back on some
> other idioms:
> - just because you *can* do something doesn't mean you *should* do it
> - explicit is better than implicit

You're (probably!) the best person to judge the syntactical balance of
pyparsing!

> Decorator syntax is already a mysterious topic for many newbies, even
> when used for its normal application.  Using a decorator to perform
> the same function as an explicit "set" call invokes cleverness at the
> cost of clarity.  Using decorators to replace:
>
> def methodX(a,b,c):
>     blah
> methodX = staticmethod(methodX)
>
> with
>
> @staticmethod
> def methodX(a,b,c):
>     blah
>
> does have some merits, including DRY.  But using decorator syntax as
> an implicit invocation of a set method? It's just taking advantage of
> the incidental implementation of the decorator syntax. It would be
> like implementing the logic of a for-loop using a list comprehension -
> clever, and yes it can be done, but maybe a bit obscure.

I understand your comment about list-comprehensions, but I haven't yet
reached the level of Python guru-ness to correlate it to decorators :)

There are more things I would have liked to expand on but
unfortunately I don't have enough time to put my thoughts together in
a communicable manner.

-- 
Arnaud


From martin at v.loewis.de  Thu May  1 14:03:22 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 20:03:22 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A05EA.6080508@v.loewis.de>

> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

You need to add your PyPI password to .pypirc.

Regards,
Martin


From alex.m.gusarov at gmail.com  Wed May 28 13:13:01 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 00:13:01 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
In-Reply-To: <pan.2008.05.27.17.46.08.159260@virgilio.it>
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<pan.2008.05.27.17.46.08.159260@virgilio.it>
Message-ID: <ac6dcb3d0805281013x2197a14u7ffa63924137b163@mail.gmail.com>

> I have a feeling that the form produced by Qt Designer, once converted to
> code, contains references to QCalendarWidget where you really want to use a
> customized calendar widget. If so, you should "promote" the calendar widget
> in Qt Designer to use your widget instead, and make sure you import the
> module that supplies it in your application.

David, thanks for noticing about "promoting" within designer, it helped me.

> Anyway, IIRC (it's a long time since I used Qt), QT allows to connect
>  more than one slot with the same signal, so you should not need to
> subclass or to create your own multi-dispatcher. Just doing:
>
> calendar.paintCell.signal( SOME_SIGNAL_NAME, my_paint_method )
>
> should work. I don't know which signal you should connect to, however.
>
> This link gives you some detail on signal/slots in PyQT:

Thanks, but actually, paintCell is not a signal, it's simply a virtual
method of caledarwidget.

--
Best regards, Alex Gusarov


From tjreedy at udel.edu  Tue May 13 03:16:41 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 03:16:41 -0400
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<m2skwo2fuj.fsf@googlemail.com><c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com><mailman.1005.1210632251.12834.python-list@python.org>
	<m2lk2eivos.fsf@googlemail.com>
Message-ID: <g0bf8m$sc9$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2lk2eivos.fsf at googlemail.com...
| "Terry Reedy" <tjreedy at udel.edu> writes:
|
| > "Arnaud Delobelle" <arnodel at googlemail.com> wrote in message
| > 
news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...
| >
| > here is a very sophisticated implementation :)
| >
| >>>> def extract(indices, seq):
| > ...     return tuple(seq[i] for i in indices)
| > ...
| >>>> y, d = extract((0, 2), time.localtime())
| >>>> y, d
| > (2008, 12)
| >
| > ===================
| > Or a generator version:
| >
| > # 3.0
| > def extract(iterable, indexes):
| >     # assume indexes are all legal

and in order, I wrote once, but seem to have erased in revising (frown)

| >     enext = enumerate(iterable).__next__
| >     i,item = enext()
| >     for index in indexes:
| >         while i < index:
| >             i,item = enext()
| >         yield item
| >
| > import time
| > print(list(extract(time.localtime(), (0,2))))
| >
| > #prints [2008, 12]
|
| but extract('python', (3, 1)) won't work!






From grayaii at gmail.com  Wed May  7 17:04:30 2008
From: grayaii at gmail.com (grayaii)
Date: Wed, 7 May 2008 14:04:30 -0700 (PDT)
Subject: subprocess wait() waits forever, but os.system returns
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>
	<mailman.723.1210193322.12834.python-list@python.org>
Message-ID: <27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>

Awesome! That worked!
And your comment just led me down another exploration path on why the
following doesn't work:
---------------------
while(returncode is None):
	returncode = run.poll()
	time.sleep(1)

out = run.stdout.readlines()
err = run.stderr.readlines()
---------------------
Nowhere in the loop am I reading stdout or err.
I'm only reading it after the loop has finished, and when running the
exe, returncode is *always* None.
Now I have to figure out a way to read it within the loop without
blocking the read... on Windows...

Thinking out loud: Perhaps it would be better to put the subprocess
commands in a separate thread so if my process hangs, I can kill it
after a given time.  Various threads in this forum suggested that
method, so perhaps I should do it that way...


From b0bm00r3 at gmail.com  Sun May 11 02:19:04 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:19:04 -0700 (PDT)
Subject: Keeping two lists aligned after processing
Message-ID: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>

"""
I have a population of five algorithms. Each Alg has a method,
Alg.accuracy(), which calculates its accuracy. Running the accuracy
method on each Alg, I end up with a list of accuracies like [0.75,
0.10, 0.45, 0.80, 0.45]

Now I want to store the algorithms and associated accuracies in a
file, in descending order of accuracy.

Here's how I do it now. There must be a better way! This method is
inelegant, and does not handle at all the issue of what to do with
duplicate accuracies, such as the two different algorithms with 0.45
accuracies in the example above. It merely saves the first of the
duplicates -- not what I want at all.

I want to end up with a file:

0 AlgD 0.80
1 AlgA 0.75
2 AlgC 0.45
3 AlgE 0.45
4 AlgB 0.10

"""

algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
accs=[]
for alg in algs:
   thisacc=getattr(alg.accuracy)()   # picked this technique on
comp.lang.python last month
   accs.append(thisacc)

unsortedaccs=[x for x in accs] # to preserve unsorted
accs.sort()
accs.reverse()   # ending up with sorted list

nuorder=[]
for ax,acc in enumerate(accs):
   spot=unsortedaccs.index(acc)
   nuorder.append(spot)

ofn=open('store.alg','w')
for ord in nuorder:
   alg=algs[ord]
   acc=unsortedlist[ord]
   ofn.write("%d %s,%s" % (ord,alg,str(acc))
ofn.close()



From arnodel at googlemail.com  Sun May 11 16:28:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 21:28:15 +0100
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net>
Message-ID: <m2wsm037s0.fsf@googlemail.com>

John Salerno <johnjsal at gmailNOSPAM.com> writes:

> John Salerno wrote:
>> I know it's popular and very handy, but I'm curious if there are purists
>> out there who think that using something like:
>>
>> for x in range(10):
>>     #do something 10 times
>>
>> is unPythonic. The reason I ask is because the structure of the for loop
>> seems to be for iterating through a sequence. It seems somewhat
>> artificial to use the for loop to do something a certain number of
>> times, like above.
>>
>> Anyone out there refuse to use it this way, or is it just impossible to
>> avoid?
>
> Ok, I think most people are misunderstanding my question a little. I
> probably should have said xrange instead of range, but the point of my
> question remains the same:
>
> Should a for loop be used simply to do something X number of times, or
> should it strictly be used to step through an iterable object for the
> purpose of processing the items in that object?

It makes me feel slightly uncomfortable too, but AFAIK there is no
better way in Python.  What I sometimes do is make the for loop bind
its variable to something useful instead of an unused counter.
Contrived example:

# Print 'hello' 10 times; x is not used
for x in xrange(10):
    print 'hello'

# By changing what is iterated over, no unused variable:
from itertools import repeat
for msg in repeat('hello', 10):
    print msg

-- 
Arnaud


From wuwei23 at gmail.com  Wed May 21 21:05:11 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:05:11 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
Message-ID: <485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>

On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> In case it's not clear what I meant: after executing some_function()
> exception SomeExcpetion gets risen. Then, in except block I do something
> to fix whatever is causing the exception and then I would like to go back
> to try block, and execute some_function() again. Is that doable?

If you know what exception to expect, and you know how to "fix" the
cause, why not just put tests _before_ some_function() is called to
ensure that everything is as it needs to be?


From nagle at animats.com  Tue May 13 13:20:41 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 13 May 2008 10:20:41 -0700
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <mailman.929.1210473312.12834.python-list@python.org>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
Message-ID: <4829cac1$0$34550$742ec2ed@news.sonic.net>

Matt Nordhoff wrote:
> John Salerno wrote:
>> I know it's popular and very handy, but I'm curious if there are purists
>> out there who think that using something like:
>>
>> for x in range(10):
>>     #do something 10 times
>>
>> is unPythonic. The reason I ask is because the structure of the for loop
>> seems to be for iterating through a sequence. It seems somewhat
>> artificial to use the for loop to do something a certain number of
>> times, like above.
>>
>> Anyone out there refuse to use it this way, or is it just impossible to
>> avoid?
> 
> Well, you should use "xrange(10)" instead of "range(10)". 

   CPython really is naive.  That sort of thing should be a
compile-time optimization.

					John Nagle


From Sam.Dutton at itn.co.uk  Sun May 25 15:38:57 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Sun, 25 May 2008 20:38:57 +0100
Subject: where do I begin with web programming in python?
Message-ID: <3F2A6E37-A9C5-4645-BEDA-A8EABB3034E7@mimectl>

This doesn't really answer your question, but you might want to consider Google App Engine.

http://code.google.com/appengine/

Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
WWW.ITN.CO.UK

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From inhahe at gmail.com  Thu May 22 13:48:29 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:48:29 -0400
Subject: import X vs from x import *
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <ckiZj.78712$%15.31414@bignews7.bellsouth.net>


<notnorwegian at yahoo.se> wrote in message 
news:c8ca75c3-98ab-4c74-8868-b58fbc12a0b2 at m73g2000hsh.googlegroups.com...
> import Tkinter
> from Tkinter import *
>
> i have a program where if i comment out either of those import-
> statements i get an error.
>
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.

the first statement imports tkinter but everything inside of tkinter in 
stored in the tkinter namespace, in other words
if tkinter has a class tk, then tk would be accessed as tkinter.tk. for 
example
import tkinter
blah = tkinter.tk()
if you do from tkinter import *, then everything in tkinter is imported at 
the top level, so it would be
from tkinter import *
blah = tk()






From pistacchio at gmail.com  Mon May 12 04:10:33 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 01:10:33 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>
Message-ID: <c1428cc5-bffb-49e3-be67-a76bf565c029@d1g2000hsg.googlegroups.com>

On 12 Mag, 10:10, pistacchio <pistacc... at gmail.com> wrote:
> On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
>
> > On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> > > hi to all!
> > > can i load a module passing to it, automatically and as default, all
> > > the caller's global variables to act as module's global variables?
> > > thanks
>
> > module = __import__('module', globals=globals())
>
> > I think that's what you're looking for.
>
> > - alex23
>
> hmm, well, maybe yes.. should i ovveride the standard import function
> of the module?
> say that the module is called "pycatrix", would adding this to the
> module solve the problem?
>
> def __import__('pycatrix', globals=globals()):

pardon, this:
def __import__('pycatrix', globals=globals()):
    pass


From tinnews at isbd.co.uk  Thu May  1 16:09:31 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 01 May 2008 20:09:31 GMT
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <481a237b$0$654$bed64819@news.gradwell.net>

Carl Banks <pavlovevidence at gmail.com> wrote:
> On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> > On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> >
> > > IMO .ini-like config files are from the stone age. The modern approach is
> > > to use YAML (http://www.yaml.org).
> >
> > You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> > and so comprehensively and completely fails to achieve its stated
> > main goal of being "readable by humans", that I had assumed it
> > was an April Fool along the lines of Intercal or brainf***.
> 
> 
> YAML, ISTM, took a simple concept that worked for small,
> straightforward data, and tried to make into a format that could
> anything anywhere, with disastrous results.  It's not unlike Perl in
> this regard.  It's quite ridiculous.
> 
> 
> My recommendation to the OP would be:
> 
> If you intend to write a GUI that completely sets all the options, use
> XML.  You can bet there are some users who would prefer text editing
> options files, and XML, while not the most readable format available,
> at least gives users the option.
> 
But XML has human unfriendly syntax, is awkward to type, is difficult
to read, what's good about it?  If there's a GUI between you and the
XML then OK, but that wasn't where we were was it?

-- 
Chris Green


From inhahe at gmail.com  Tue May  6 08:36:28 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 6 May 2008 08:36:28 -0400
Subject: select.poll() and WSAPoll
Message-ID: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>

select.poll isn't supported on Windows, because Windows doesn't have such a 
feature, or at least it didn't until Vista.  Vista implements the same thing 
but called  WSAPoll, an article is here 
http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
I hope that the next edition of Python supports select.poll on Vista, or at 
least that someone writes a third-party module fo it. As much as I'd love to 
do it myself, it's probably beyond me.. i've never used poll before nor 
written a Python extension.  also, i don't have Vista.
Thanks





From danb_83 at yahoo.com  Sun May 11 02:35:47 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Sat, 10 May 2008 23:35:47 -0700 (PDT)
Subject: Keeping two lists aligned after processing
References: <3695ddb4-373f-4702-bdb8-4d067778fa7a@e53g2000hsa.googlegroups.com>
Message-ID: <707cec67-1844-499d-95ef-8937bdcf1e1c@v26g2000prm.googlegroups.com>

On May 11, 1:22?am, philly_bob <b0bm0... at gmail.com> wrote:
>
> I have a population of five algorithms. Each Alg has a method,
> Alg.accuracy(), which calculates its accuracy. Running the accuracy
> method on each Alg, I end up with a list of accuracies like [0.75,
> 0.10, 0.45, 0.80, 0.45]
>
> Now I want to store the algorithms and associated accuracies in a
> file, in descending order of accuracy.
>
> Here's how I do it now. There must be a better way! This method is
> inelegant, and does not handle at all the issue of what to do with
> duplicate accuracies, such as the two different algorithms with 0.45
> accuracies in the example above. It merely saves the first of the
> duplicates -- not what I want at all.
>
> I want to end up with a file:
>
> 0 AlgD 0.80
> 1 AlgA 0.75
> 2 AlgC 0.45
> 3 AlgE 0.45
> 4 AlgB 0.10

algs.sort(key=Alg.accuracy, reverse=True)


From george.sakkis at gmail.com  Tue May 13 14:19:32 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 13 May 2008 11:19:32 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>

On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:

> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?

You must be new here. It is an AS (Artificial Stupidity) trolling bot,
you can safely ignore its posts.

>
> On May 13, 9:02 am, castiro... at gmail.com wrote:

<gibberish snipped>


From jkrukoff at ltgc.com  Thu May 15 19:11:22 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:11:22 -0600
Subject: no inputstream?
In-Reply-To: <f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
Message-ID: <1210893082.3312.2.camel@jmk>


On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> >
> > > you're right, my java implementation does indeed parse for Id3v2
> > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > i buffer and parse.  apologies if i misrepresented my code!
> >
> > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > Mutagen/Tutorial) leads me to believe that something like this might
> > > work:
> >
> > > from mutagen.mp3 import MP3
> > > id3tags = MP3(urllib2.urlopen(URL))
> >
> > > but this gives me the following TypeError: "coercing to Unicode: need
> > > string or buffer, instance found".  does this mean i need to convert
> > > the "file-like object" that is returned by urlopen() into a unicode
> > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > complex?  as of now, doing so gives me mostly "No such file or
> > > directory" errors, with a few HTTP 404s.
> >
> > [snip]
> > I think it's expecting the path of the MP3 but you're giving it the
> > contents.
> 
> cool, so how do i give it the path, if not in the form of a URL
> string?  maybe this is obvious...
> --
> http://mail.python.org/mailman/listinfo/python-list

It doesn't look like you can, with mutagen. So, time to find a different
library that supports arbitrary file objects instead of only file paths.
I'd suggest starting here:
http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search

Possibly one with actual documentation, since that would also be a step
up from mutagen.

-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From 42flicks at gmail.com  Tue May 13 17:34:38 2008
From: 42flicks at gmail.com (Mike)
Date: Wed, 14 May 2008 09:34:38 +1200
Subject: feedparser
In-Reply-To: <1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>
	<mailman.1044.1210676785.12834.python-list@python.org>
	<1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>
Message-ID: <2b54d4370805131434i20b84444peee962a8566c0db6@mail.gmail.com>

On Tue, May 13, 2008 at 11:16 PM, <castironpi at gmail.com> wrote:

> On May 13, 6:06 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> > En Tue, 13 May 2008 07:30:44 -0300, Mike <42fli... at gmail.com> escribi?:
> >
> >
> >
> >
> >
> > > I'm trying to use the feedparser module (http://www.feedparser.org/).
> >
> > > Is it possible to use this without running the setup program?
> >
> > > I don't see why not, seems like I'm missing something obvious.
> >
> > > My directory structure is:
> >
> > > myprogram.py
> > >     /feedparser
> > >         /feedparser.py
> >
> > > I know I can install the module in the modules directory but would
> like
> > > to
> > > avoid this for two reasons: I'm only using it for the one project so
> > > would
> > > like to keep it seperate, and if I move to a shared host I may not be
> > > allowed to install additional modules (not sure if this is correct
> > > though).
> >
> > The easiest way would be to put the single module feedparser.py in the
> > same directory as your program (I don't  completely get your reasons not
>
> > to do that). OR put feedparser.py in some other directory that is
> already
> > listed in sys.path. OR add the directory containing feedparser.py to
> > sys.path, just at the beginning of your program.
> >
> > > I've tried:
> >
> > > import feedparser
> >
> > > import feedparser.feedparser
> >
> > > from feedparser import feedparser
> >
> > > What am I doing wrong? :)
> >
> > *IF* the directory 'feedparser' were a package (that is, if it contained
> a
> > file __init__.py), then that last import statement would be valid. But I
>
> > don't reccomend doing this; you're changing the module's environment.
> >
> > --
> > Gabriel Genellina- Hide quoted text -
> >
> > - Show quoted text -
>
>
> I've overlooked the fact there is no _init_.py, I was expecting it to
behave as a package. I'll put the file in my current directory as you
suggested. Thanks for the explanation, it was very helpful and much
appreciated.
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From Lie.1296 at gmail.com  Sun May 18 02:44:18 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sat, 17 May 2008 23:44:18 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com> 
	<e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com> 
	<d24568a8-ce7c-473b-b059-1edf41f6ffee@b64g2000hsa.googlegroups.com>
Message-ID: <8c9a70fb-4f2b-46df-91b0-e979e4221108@u6g2000prc.googlegroups.com>

On May 16, 3:58?am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 15 mai, 19:30, Lie <Lie.1... at gmail.com> wrote:
>
>
>
> > On May 15, 4:08 am, "bruno.desthuilli... at gmail.com"
>
> > <bruno.desthuilli... at gmail.com> wrote:
> > > On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > > > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > > > single language compiler instead of three dimensional compiler that
> > > > > GCC is (cross platform, cross target platform, cross language).
>
> > > > And to add, I also need to mention that Python doesn't need to be
> > > > compiled at all,
>
> > > No language needs compilation - it's an implementation problem, not a
> > > language problem. Now all the Python's implementations I know do use
> > > compilation (to byte-code).
> > > > its py and pyo file is architecture independent.
>
> > > True, but this is not strictly related to being compiled or not.
>
> > It's true, it's implementation problem whether a language is compiled
> > or not, but what I was emphasizing was that Python's code is
> > architecture independent at all stages (that is visible to the user
> > and the programmer), on the other hand, a compiled code is a compiled
> > code is a compiled code,
>
> Ever wondered what all these .pyc files were ?
>
> > it cannot be architecture independent without
> > packing multiple binaries in the same executable (like in Macintosh's
> > universal binary) or using an emulation (with huge overheads) or at
> > least using a compatibility layer (which doesn't always work) and all
> > this is done in the layer that is visible to user and programmer
> > (programmer having to compile against everything and user having to
> > download the correct executable) instead of being done in a platform
> > independent way that interpreted language like Python have.
>
> Python is not interpreted, because being interpreted is a feature of
> an implementation, not of a language. And so far, no known Python
> implementation is (strictly speaking) interpreted - they all compile
> to byte-code. "compiled" doesn't necessarily imply "compiled to
> platform native binary code", you know.

That's beside the point, the point is about platform independentness
of the .py file. When I call Python is interpreted, I meant that the
CPU doesn't directly interpret python codes (in most Python
implementation).

> Ok, this may look like a bit on the splitting hairs side. But may I
> remind you that to run ever a .pyc file, you do need to have the
> Python runtime (VM + quite a lot of libs) installed one way (normal
> install) or another (packed in something that looks like an ordinary
> "executable" - whatever this means for the target platform) ? OTHO,
> it's true that a .pyc file is platform-independant ?- it just requires
> the correct versions of quite a lot of platform-dependant binaries.
> Wait... Isn't this code some kind of a "visible to the user and
> programmer" "compatibilty layer" ?

With the same bit on being on the splitting hair side: It's the same
with msvcrt in C or msvbvm60 in VB, programming language runtime is
invisible to the user, it's visible to the system administrator
(which, in many cases is also the user though). It is, however,
invisible to both the user and the programmers.


From pavlovevidence at gmail.com  Fri May 23 04:07:39 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 01:07:39 -0700 (PDT)
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
Message-ID: <3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>

On May 22, 10:28 pm, thomas.karol... at googlemail.com wrote:
> Hi,
> I would like to create a Decorator metaclass, which automatically
> turns a class which inherits from the "Decorator" type into a
> decorator.
> A decorator in this case, is simply a class which has all of its
> decorator implementation inside a decorator() method. Every other
> attribute access is being proxied to decorator().getParent().
>
> Here's my attempt:

You got deep stuff going on there, chief, and some of it's wrong.
I'll try to point it out.

> -------------------------------------------------------
> from new import classobj
>
> class DecoratorType(type):
>         def __new__(cls, name, bases, dct):
>                 dct2 = {}
>                 for key, val in dct.iteritems():
>                         dct2[key] = val

First of all, you can just do dct2 = dct.copy().
Second, since you never use dct again, even copying it is unnecessary.


>                 # create a new class which will store all of the implementation
>                 impl = classobj('%sImpl'%name,(),dct2)

classobj creates an old-style class, and I'm pretty sure you don't
want to do that.  To create a new-style class, use type:

    impl = type('%sImpl'%name,(),dct)


>                 # update the old class to implement this implementation
>                 def __init__(self, *args, **dargs):
>                         object.__setattr__(self, '__impl', impl(*args, **dargs))

As your code stands now, object.__setattr__ isn't necessary here; just
using

    self.__impl = impl(*args,**dargs)

should work fine.  I'm guessing you intend to override __setattr__
later?

If you do use object.__setattr__, I suggest that you might want to
call the superclass's __setattr__ instead of object's.  I imagine in
this case the superclass will rarely want to override __setattr__
itself, but in general it's a good idea.  In this particular
circumstance, we don't yet have the class object (it doesn't come till
after calling type.__new__) but we do have the parent class.  So you
might consider changing the definition of __init__ to this:

    basecls = bases[0] if bases else object
    def __init__(self, *args, **dargs):
        basecls.__setattr__(self, '__impl', impl(*args, **dargs))

>                 def decorator(self):
>                         return object.__getattribute__(self,'__impl')

Again, consider changing it to

    def decorator(self):
        return basecls.__getattribute(self,'__impl')

>                 def __getattribute__(self, attr):
>                         if attr=="decorator":
>                                 return object.__getattribute__(self,'decorator')
>                         return getattr(object.__getattribute__(self, 'decorator')
> ().getParent(), attr)
>                 dct = {}
>                 dct['__init__'] = __init__
>                 dct['decorator'] = decorator
>                 dct['__getattribute__'] = __getattribute__
>
>                 return type.__new__(cls, name, bases, dct)
>
> class Decorator(object):
>         __metaclass__ = DecoratorType

Parenthetical: I don't normally recommend this style, since it
obscures the fact that you're using a custom metaclass to the user.
That is something the user probably would benefit from knowing, if for
no other reason than so they can make a mental note about where to
look first if something goes wrong.  I prefer to make the user use the
__metaclass__ attribute.

However, I could see it being desirable for some cases where you're
trying to be as transparent as possible, and indeed it looks as if
that's your goal here.


> class HBar(Decorator):
>         def __init__(self, number):
>                 Decorator.__init__(self)

Ok, at this point you have to ask yourself what you want to do,
because the solution you choose will involve trade-offs.

You will note that Decorator does not define __init__.  In fact,
object.__init__ will be called, which does nothing.  If you think that
all classes with DecoratorType as their metaclass will be a direct
subclass of Decorator, you can get away with not calling
Decorator.__init__ at all.

However, this can cause problems if a user wants to define their own
base class with an __init__ that does something (either by using the
__metaclass__ attribute, or by subclassing a Decorator subclass).  In
that case, you will have to make arrangements to pass the decorator
object to the superclass instead of the decorated.  This can be pretty
hairy, and it beyond the scope of this reply.

To do it completely transparently, your decorated class will probably
have to maintain a reference to its decorator, and will also have to
derive from a base class that delegates any method calls to the
superclass of the decorator.  (Phew.)

That won't be as easy as it sounds.


>                 self._number = number
>         def inc(self):
>                 self._number += 1
>         def p(self):
>                 print self._number
>
> hbar = HBar(10)
> for each in dir(hbar.decorator()):
>         print each
>
> hbar.decorator().p()
> hbar.decorator().inc()
> hbar.decorator().p()
> -------------------------------------------------------
> Unfortunately this does not work. The newly defined __init__ method
> inside __new__, does a call to impl(*args, **dargs). However, since
> the HBar.__init__ calls the Decorator.__init__ method, but the
> HBar.__init__ method no longer resides inside HBar, but rather inside
> HBarImpl (which is no longer a subtype of Decorator), the compiler
> complains that Decorator.__init__ is not being called with a Decorator
> instance as its first argument (which is true).
> I tried changing the definition of impl inside __new__ to have
> Decorator as one of its bases, but then for some reason impl(*args,
> **dargs) asks for 4 arguments (just like __new__) and I have no clue
> as to why that happens.

I believe it's happening because you mixed old-style and new-style
classes.  But it's not the right solution anyway.

> Any help on this?

Probably the best piece of advice is "Don't try to use Decorator
pattern".  :)

Seriously, you might want to see what other people have done in
similar cases.  This stuff is tricky to get right, so maybe you should
shamelessly ride the coattails of someone who already ran into all the
issues.  One example I can think of is the ZODB Persistent class (it's
a proxy class, so some of the same issues are involved).  Perhaps
searching Python cookbook for some proxy or decorator class recipes
will give you ideas.


Carl Banks


From upton at virginia.edu  Mon May 19 23:59:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 19 May 2008 23:59:32 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <5504f9ac0805192059j5d14c6c6sbf12984faf5da3ef@mail.gmail.com>

On Mon, May 19, 2008 at 11:20 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
>
> For another example, I've always preferred languages that are English-
> like because it's easier to return to your code after several years
> and still know what you were doing (and it's easier for someone else
> to maintain your code).
>

Unless of course you use reasonable variable names and have good
comments in your code.  I don't think figuring out well-documented C
code would be any easier if it were in a more English-like
syntax--IMO, it's usually the understanding the interfaces or figuring
out what's going on in functions that makes reading someone else's
code tricky, not the difference between "x=" and "set x to."


From ndbecker2 at gmail.com  Wed May 21 12:54:32 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 12:54:32 -0400
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
	<5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>
Message-ID: <g11k48$iik$1@ger.gmane.org>

marek.rocki at wp.pl wrote:

> Neal Becker napisa?(a):
>> In an earlier post, I was interested in passing a pointer to a structure
>> to fcntl.ioctl.
>>
>> This works:
>>
>> c = create_string_buffer (...)
>> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
>> err = fcntl.ioctl(eos_fd, request, args)
>>
>> Now to do the same with ctypes, I have one problem.
>>
>> class eos_dl_args_t (Structure):
>>     _fields_ = [("length", c_ulong),
>>                 ("data", c_void_p)]
>> ...
>> args = eos_dl_args_t()
>> args_p = cast(pointer(args), c_void_ptr).value
>> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>>
>> That last may fail, because .value creates a long int, and ioctl needs a
>> string.
>>
>> How can I convert my ctypes structure to a string?  It _cannot_ be a
>> c-style 0-terminate string, because the structure may contain '0' values.
> 
> Hello. I'm not completely sure what your problem is ("may fail" is not
> a good description. Does it fail or does it not?). If you want a
> pointer to a structure as the third argument to ioctl, this would be
> imho the easiest way to do it with ctypes:
> 
>> class eos_dl_args_t(Structure):
>>     _fields_ = [("length", c_ulong), ("data", c_void_p)]
>> args = eos_dl_args_t()
>> fcntl.ioctl(fd, request, byref(args))
> 

Seems to be a problem with that:
---> 59 err = fcntl.ioctl(eos_fd, request, byref(args))
     60 

TypeError: an integer is required




From malaclypse2 at gmail.com  Wed May 21 16:44:29 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 21 May 2008 16:44:29 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
Message-ID: <16651e80805211344h3f2a9227n79420dc012d62f06@mail.gmail.com>

On Wed, May 21, 2008 at 4:34 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 12:38 pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
>> >>> a+0.999     # gives expected result
>> 9999999999999998.0
>> >>> a+0.9999   # doesn't round correctly.
>>
>> 10000000000000000.0
>
> Shouldn't both of them give 9999999999999999.0?

My understand is no, not if you're using IEEE floating point.

> I wrote the same program under Flaming Thunder:
>
>     Set a to 10^16-2.0.
>     Writeline a+0.999.
>     Writeline a+0.9999.
>
> and got:
>
>     9999999999999998.999
>     9999999999999998.9999

You can get the same results by using python's decimal module, like this:
>>> from decimal import Decimal
>>> a = Decimal("1e16")-2
>>> a
Decimal("9999999999999998")
>>> a+Decimal("0.999")
Decimal("9999999999999998.999")
>>> a+Decimal("0.9999")
Decimal("9999999999999998.9999")
>>>

-- 
Jerry


From kyosohma at gmail.com  Fri May  9 09:09:37 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 06:09:37 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>

On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??
>
> Thanks
>
> Clive

I have PythonWin installed in my Start Menu --> Programs --> Python
2.5. I may have installed the ActiveState version though. Just check
if it's there on your system and if not, you can follow Niklas's
advice.

Mike



From sturlamolden at yahoo.no  Sun May 18 19:19:03 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 16:19:03 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>

On May 19, 12:20 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:

> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)


Back in the 'old days' of Unix, programs tended not to be small, could
only do one thing, and did it well. They had  no gui, and all
interaction came from command line options. The programs were invoked
from the command line, and input and output were piped from one
program to another (input on stdin, output on stdout).

Today, it is expected that programs should have a GUI. The majority do
not even know how to use a program that does not have one. As a
result, programs have become poorer at interacting with other, and
become bloated and grown monolithic. Today's programs are monolithic
beasts spanning tens or hundreds of megabytes, where the bulk of the
code duplicates functionality found in every other program.

I prefer that a program has no GUI if it does not need user
interaction beyond what can be easily accomplished from the command
line. Sometimes I think gui becomes overwhelming, and obfuscates the
real functionality in the program. When I write program's for others
people, a GUI is usually expected. But when I get requests for adding
new functionality to such a program, it tends to be for unimportant
GUI stuff rather than real functionality to the program.

To answer your question: I only add GUIs when I have to. But because
it seems that people are becoming computer illiterate, incapable of
using a keyboard, and only comfortable with a certain point-and-click
input device, it tends to be most of the time now.








From gpanterov at yahoo.com  Tue May 13 14:39:27 2008
From: gpanterov at yahoo.com (Georgy Panterov)
Date: Tue, 13 May 2008 11:39:27 -0700 (PDT)
Subject: list index out of range
Message-ID: <46657.69485.qm@web50406.mail.re2.yahoo.com>

I am a relatively new python user. I am writing an economic simulation of a card-game. The simulation runs fine for a few iteration but then it gives an error of "list index out of range." 

The strange thing is that it will sometimes run for 10 iterations sometimes for only a few and sometimes won't run at all (seemingly arbitrary). 
Here is some of the code:

for _ in range(100):
    handA=deal_hand(DECK) #deals 2 'hole' cards from a DECK
    handB=deal_hand(DECK) 
    print handA
    print handB
    deal_flop(handA,handB,DECK) #appends 3 cards to handA and handB
    deal_current(handA,handB,DECK) #appends one more card
    deal_rake(handA,handB,DECK) #appends one more card
    DECK.extend(list(set(handA+handB))) #returns the cards to the DECK
    print winner(handA,handB) #returns 0-draw 1 -playerA win, 2-playerB win

The error message is :

['08C', '10H']
['07S', '03C']
--------
['06C', '02H']
['04D', '12S']
--------
['11H', '14S']
['06S', '04S']
--------

Traceback (most recent call last):
  File "G:\Other Stuff\POKER4.py", line 267, in <module>
    handB=deal_hand(DECK)
  File "G:\Other Stuff\POKER4.py", line 13, in deal_hand
    HAND.append(deck[i])
IndexError: list index out of range

In this case it ran 3 times. It will sometimes run for up to 9-10 times. It seems to be arbitrary but I can't get it to run more than 12 times.

Here is the code for the --deal_***-- functions:

def deal_hand(deck):
    HAND=[]
    for _ in range(2):  
        i=random.randint(0,len(deck)) #produces a random card from the deck
        HAND.append(deck[i]) # appends the card to the players' hand list
        deck.remove(deck[i]) #removes the card from the deck
    return HAND

def deal_flop(hand1,hand2,deck):
    for _ in range(3):
        i=random.randint(0,len(deck))
        
        hand1.append(deck[i])
        hand2.append(deck[i])
        deck.remove(deck[i])

I would appreciate any help with this
Thanks
George


Send instant messages to your online friends http://uk.messenger.yahoo.com 


From arnodel at googlemail.com  Tue May 20 03:21:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 08:21:11 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
	<48327914$0$30041$426a74cc@news.free.fr>
Message-ID: <m27idp8mqg.fsf@googlemail.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Paul McGuire a ?crit :
>> On May 19, 11:04 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>> Paul McGuire <pt... at austin.rr.com> writes:
>>>
>>> [...]
>>>
>>> Could you use it as a decoratore instead?
>>>
>>> integer = Word("0123456789")
>>>
>>> @integer.setParseAction
>>> def parse_integer(tokens):
>>>     return int(tokens[0])
>>>
>>> I could make your grammar clearer, because you don't mix it with
>>> processing code... and no need for lambdas!
>>
>> What a sexy little idiom!  You could really apply this to any API
>> method that accepts a callable as a single argument, and pyparsing
>> actually has several of these:
>>
>> setParseAction
>> addParseAction
>> setFailAction
>> setDebugActions
>>
>> (Unfortunately, setDebugActions requires 3 callables for its arguments
>> - one to be run when an expression is about to be parsed, one to be
>> run after parsing is complete, and one to be run if the expression
>> fails to be parsed.  So setDebugActions can't be used in this
>> decorator manner.)
>
> You just have to provide three decorators instead, one for each callback.
>
>>
>> Using these methods as decorators deviates from the typical decorator
>> usage model as I understand it - instead of wrapping the provided
>> function within some enclosing setup/teardown code (like lock/unlock,
>> or open-file/close-file, or begin-transaction/commit-transaction), and
>> then returning the created wrapper function, the decorator usage you
>> propose is one in which the decorator uses the provided function with
>> some side-effect (such as setting a property), but then just returns
>> the original function.
>
> This is already a well-known decorator pattern. It's used in CherryPy
> to mark methods that are exposed as request handlers.

Actually, IIRC the decorator provided by CherryPy is something like
(names are probably wrong, as I haven't looked at CherryPy for a
while):

def exposed(f):
    f.is_exposed = True
    return f

So it doesn't mutate anything else than the function that it
decorates, but changes slightly how the world sees that function.
This is in line with classic decorators such as staticmethod,
classmethod, etc.

-- 
Arnaud


From bockman at virgilio.it  Sun May  4 13:18:42 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 04 May 2008 19:18:42 +0200
Subject: Determine socket family at runtime
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
Message-ID: <pan.2008.05.04.17.18.39.99752@virgilio.it>

On Sun, 04 May 2008 08:49:55 -0700, Giampaolo Rodola' wrote:

> Hi there,
> since the socket.socket.family attribute has been introduced only in
> Python 2.5 and I need to have my application to be backward compatible
> with Python 2.3 and 2.4 I'd like to know how could I determine the
> family of a socket.socket instance which may be AF_INET or AF_INET6.
> Is there some kind of getsockopt() directive I could use?
> For now I've been able to determine the family by using:
> 
> # self.socket = a connected socket.socket instance
> ip, port = self.socket.getsockname()[0:2]
> af = socket.getaddrinfo(ip, port)[0][0]
> 
> ...but I'd like to know if some other solution is preferable.
> 
> 
> 
> Thanks.
> 
> 
> --- Giampaolo
> http://code.google.com/p/pyftpdlib

Ciao,

what about wrapping the socket type and  adding a 'family' attribute
to the base socket class? Something like:

class SocketWrapper(socket.socket):
	def __init__(self, family, type, proto=0):
		socket.socket.__init__(self, family, type, proto)
		self.family = family

then you have just to create the sockets with SocketWrapper insetead of
socket.socket. For the rest of your code it would not matter, and then you 
are sure to always have a .family attribute.

Ciao
----
FB


From lew at lewscanon.com  Sat May 10 17:39:42 2008
From: lew at lewscanon.com (Lew)
Date: Sat, 10 May 2008 17:39:42 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <m1k5i2rupm.fsf@dot-app.org>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
	<IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>
	<m1k5i2rupm.fsf@dot-app.org>
Message-ID: <UNadnSyhW72Ci7vVnZ2dnUVZ_uSdnZ2d@comcast.com>

Sherman Pendley wrote:
> Lew <lew at lewscanon.com> writes:
> 
>> You guys are off topic.  None of the million groups to which this
>> message was posted are about netiquette.
> 
> Netiquette has come up at one point or another in pretty much every
> group I've ever read. It's pretty much a universal meta-topic.

Good, then please have the courtesy not to include comp.lang.java.programmer 
in the distribution for this thread any longer.

-- 
Lew


From donnyf at gmail.com  Thu May  8 21:34:06 2008
From: donnyf at gmail.com (donnyf at gmail.com)
Date: Thu, 8 May 2008 18:34:06 -0700 (PDT)
Subject: Using Python to verify streaming tv/radio station links
References: <d7482731-5b23-4f05-bac7-3c96899711e9@l28g2000prd.googlegroups.com>
	<2e6baf9b-09d3-430e-9e01-cd56ec6e1a33@t54g2000hsg.googlegroups.com>
Message-ID: <8f8eb5ff-f0b4-4123-8185-904f611c3824@m44g2000hsc.googlegroups.com>

On Apr 29, 10:11 am, alexel... at gmail.com wrote:
> Hey!
>
> With regards checking feeds, look into urllib (maybe) and the httplib
> (definitely). They /could/ offer some sort of information regarding
> the activity of your feeds. Without knowing anything about the
> streaming protocols I wouldn't suggest my methods to necessarily be
> the most helpful. You could, at least [maybe], establish whether a
> feed is active if it can return a HTTP 200 response. If that's a
> sufficient check I would suggest that httplib is the place to start.
>
> Alex.

Thanks for the reply.  I'm not so sure that httplib is going to work
as most of these are not http urls.  Here's a handful of examples that
maybe someone could use to give me an idea of how to accomplish what
I'm trying to do.

Here's a list of the various types of media links I have in my
database (all working):

http://www.dradio.de/streaming/dkultur_hq_ogg.m3u
http://200.29.92.21/ucvtv
http://www.ampmedia.org/asx/marina25.asx
http://www.jazz.fm/streaming/JAZZFM91.pls
mms://144.122.56.15/ODTU-TV
rtsp://200.79.7.137/broadcast/tv.rm

The httplib approach may work the http urls, but what about the mms
and rsp 'protocols'?

Please remember that I only know enough to be dangerous and that I'm
much more a hacker than I am a programmer.  As always, any help is
greatly appreciated!


From wizzardx at gmail.com  Sun May  4 08:22:46 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:22:46 +0200
Subject: Script Optimization
In-Reply-To: <18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>
Message-ID: <18c1e6480805040522q4dd36701x69bc83f44f5b8cfa@mail.gmail.com>

Eh, I forgot the attachment.
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From pete.forman at westerngeco.com  Tue May 13 05:45:37 2008
From: pete.forman at westerngeco.com (Pete Forman)
Date: Tue, 13 May 2008 10:45:37 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805080912.29438.onsen-neko@gmx.net>
	<1210244572.6529.5.camel@jcd-desktop>
	<200805081911.47081.onsen-neko@gmx.net>
	<1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
	<mailman.796.1210267635.12834.python-list@python.org>
Message-ID: <r6c6edvi.fsf@wgmail2.gatwick.eur.slb.com>

I would suggest that using an interface at compile time is not the
only approach.  Unit tests can be run on classes to check that they do
indeed quack.
-- 
Pete Forman                -./\.-  Disclaimer: This post is originated
WesternGeco                  -./\.-   by myself and does not represent
pete.forman at westerngeco.com    -./\.-   the opinion of Schlumberger or
http://petef.22web.net           -./\.-   WesternGeco.


From castironpi at gmail.com  Thu May 15 10:07:28 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:07:28 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<482c42d9$0$9669$426a34cc@news.free.fr>
Message-ID: <1fc6c5b4-f4e6-4a1c-8ab0-b07d7f269a66@l42g2000hsc.googlegroups.com>

On May 15, 9:04?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> castironpi a ?crit :
>
> > Why can't I write this?
>
> Because one or more of the "t", "h", "i", "s" keys are missing from your
> keyboard ?

No; they're all here.


From castironpi at gmail.com  Tue May 13 09:44:04 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:44:04 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com>

On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Don't let yourself be irritated by castironpi
>
> I'm not the sort to get irritated by anyone. ?There is value in all
> interaction. ?Flaming Thunder is itself the averaging of interactions
> with many computer languages and conversations with many people, so as
> to create a language that allows people to tell a computer what they
> want it to do, without having to know very much about how the computer
> does it.
>
> On May 13, 3:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > Dave Parker wrote:
> > > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> > >>Yes, I am trying to visualize something.
>
> > > If it is related to making furniture comfortable for humans, have you
> > > considered painting the furniture with thermochromic paint (
> > >http://en.wikipedia.org/wiki/Thermochromism)??It changes color in
> > > response to temperature, which in part is determined by how hard a
> > > body is pressed against it because close contact tends to trap heat.
> > > An evenly distributed color might indicated evenly distributed
> > > pressure.
>
> > Don't let yourself be irritated by castironpi - he's the virtual equivalent
> > of a mumbling mad man in this group. Ignorance serves best as remedy - and
> > getting a filter to work, as I did (so I only see his postings being
> > quoted... a huge relief!)
>
> > Diez- Hide quoted text -
>
> - Show quoted text -

I got hung-up on your sailboat and it took me to coffee.  But I return
empty-handed, and castironpi does not bother me.  All I try to do in
life is write video games.  I am not convinced that the colorspace
occupies three dimensions necessarily.  But I do like sailboats and
furniture.

I am into city planning, roadways, infrastructure, but don't work -
too- hard.  Furniture can be pretty stock and utility on the micro
level--- there's just been runs on the banks before to microize to
certain energy/mass/volume/metabolism levels.  People like stuff and
pull.

If I can get a word in, I also like to distribute economy, and
microize currency.  So long as currency stays current, nobody minds.
Do you need something done... or said?


From mccredie at gmail.com  Fri May  9 19:06:17 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 9 May 2008 16:06:17 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
Message-ID: <d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>

On May 9, 3:19 pm, globalrev <skanem... at yahoo.se> wrote:
> i want to a little stringmanipulationa nd im looking into regexps. i
> couldnt find out how to do:
> s = 'poprorinoncoce'
> re.sub('$o$', '$', s)
> should result in 'prince'
>
> $ is obv the wrng character to use bu what i mean the pattern is
> "consonant o consonant" and should be replace by just "consonant".
> both consonants should be the same too.
> so mole would be mole
> mom would be m etc

>>> import re
>>> s = s = 'poprorinoncoce'
>>> coc = re.compile(r"(.)o\1")
>>> coc.sub(r'\1', s)
'prince'

Matt


From deets at nospam.web.de  Sat May 24 08:43:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 14:43:56 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
In-Reply-To: <mailman.1522.1211630957.12834.python-list@python.org>
References: <mailman.1522.1211630957.12834.python-list@python.org>
Message-ID: <69qgseF31lv3aU1@mid.uni-berlin.de>

Mathieu Prevot schrieb:
> Hi
> 
> I import subprocess and use Popen, but PIPE is not defined. I used
> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
> always the same. What am I missing ?

Without showing code, it's hard to know. A guess is: if you use

import subprocess


then use


subprocess.PIPE

Or if using

from subprocess import Popen

make sure to do

from subprocess import Popen, PIPE

Diez


From mcknight0219 at gmail.com  Wed May 14 21:31:20 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Wed, 14 May 2008 18:31:20 -0700 (PDT)
Subject: create window on panel
Message-ID: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>

Hi, all

I have been trying to use wxPython to design a GUI that will be
displayed on the panel on the top of desktop. that is when the
program starts, it will dwell on the panel to display some dynamic
information.

can anyone tell me in wxPython how to do this? thanks!


From castironpi at gmail.com  Thu May  8 20:29:57 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:29:57 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
Message-ID: <875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com>

On May 8, 4:35?pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> >> The thing is, I'm not using slots by choice. ?I'm using the standard
> >> lib "socket" class, which apparently uses slots.
>
> > `socket` objects can't be pickled. ?Not just because of the
> > `__slot__`\s but because a substantial part of their state lives in
> > the operating system's space.
>
> Of course, if it makes sense to pickle sockets in the application, one
> is can do so by defining __getstate__ and __setstate__:
>
> class Connection(object):
> ? ? def __init__(self, host, port):
> ? ? ? ? self.host = host
> ? ? ? ? self.port = port
> ? ? ? ? self.init_sock()
>
> ? ? def init_sock(self):
> ? ? ? ? self.sock = socket.socket()
> ? ? ? ? self.sock.connect((host, port))
> ? ? ? ? ... init communication ...
>
> ? ? def __getstate__(self):
> ? ? ? ? # pickle self as a (host, port) pair
> ? ? ? ? return self.host, self.port
>
> ? ? def __setstate__(self, state):
> ? ? ? ? # reinstate self by setting host and port and
> ? ? ? ? # recreating the socket
> ? ? ? ? self.host, self.port = state
> ? ? ? ? self.init_sock()

I, local, am mystified that you'd want to pickle a socket.  It's a
live connection, which flies on a pocket dollar.  You don't want it on
disk, do you?

If you're running a net buoy through a cluster somewhere, do you want
to drop a server and reconnect?  Is Amazon's EC2 up and running?

Certainly no one was talking on the internet.  Were you?

I don't think you hit anything but banks surfing the web, and the
American dollar is notoriously stuffy.  Pump a wi-fi to a diner,
though, and you're just talking more.  Where's Usenet?


From inhahe at gmail.com  Sun May 18 06:37:30 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:37:30 -0400
Subject: morning in Python
Message-ID: <IETXj.11283$hv2.3918@bignews5.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
>
>>It is not clear that the first (cheapest best) human->computer language
>>is a computer language, though if two were orthonormal >in comparison
>>to life, Python's fine.  Not my first.
>
> The utterly dry, closed, logical, definitive, hierarchical, consistent, 
> determinate nature of a computer language is the only thing that will 
> facilitate anything useful on something as utterly stupid (and not to 
> mention logical, definite and determined) as a computer.
>
> I mean it, computers are /really/ stupid.  They're literally
> stupider than a bug.  We just like things we can control.
>
> The requisites I have for a computer language are:
>
> Efficiency (speed)
> Elegance of syntax
> Powerful (conceptual-wise) abstractions
>
> Python has delicious abstractions that make doing a lot of things really 
> easy and fun to think about.
> Stackless Python adds even more to that with continuations.
> Also Python's dynamic (another aspect of being powerful conceptual-wise)
> But most of all, I love its syntax.  Guido is the awesome.
> (BTW, I won't even use any language that uses := for assignment.  I just 
> refuse.  I don't care what the language has.)
>
> The speed/efficiency issue depends on the task at hand.  For most things I 
> use Python.  But assembly isn't out of the question, and it's fun to code 
> in.  I also find C/C++ an elegant language.  Most things just don't need 
> that speed.   And Python is 50 times easier to code in than C/C++ and 1000 
> times easier to debug in.
>
> I also like C#.
>
> My ideal language would be a natively compiling cross between C++ and 
> Python.  Objects declared with a type would be statically typed, objects 
> not declared with a type would be dynamically typed.  There would also be 
> keywords to declare that class names won't be reassigned and class 
> attributes won't be deleted.  Those attributes would be referred to by 
> offset, not hast table keys.  f

hast = hash 




From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 08:19:08 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 14:19:08 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
Message-ID: <482d7bbc$0$15491$426a74cc@news.free.fr>

globalrev a ?crit :
> wassup here?
> 
> 
> 7
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> <module>
>     print cust1.getID()
> AttributeError: 'NoneType' object has no attribute 'getID'
> 
> 
> 
> class customer:

1/ naming convention : class names should be CamelCased
2/ unless you need compatibility with years old Python versions, use 
newstyle classes

class Customer(object):

>     def __init__(self, ID, movies):
>         self.ID = ID
>         self.movies = movies

3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants

     def __init__(self, id, movies):
         self.id = id
         self.movies = movies

>     def getID():
>         return self.ID
> 
>     def getMovies():
>         return self.movies

4/ Python has support for computed attributes, so you just don't need 
these getters.

> 
> import os
> import customer
> import movie
> 
> mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> mv1str = mv1.read()
> 
> print mv1str.count(',5,')
> 
> cust1 = customer.__init__('12',['1','435','2332'])

__init__ is automagically called on instanciation, so you don't have to 
call it yourself. And FWIW, your __init__ returns None.

cust1 = Customer('12', ['1', '435', '2332'])

> print cust1.getID()

print cust1.id



From irmen.NOSPAM at xs4all.nl  Mon May 12 05:00:06 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 12 May 2008 11:00:06 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <mailman.963.1210573120.12834.python-list@python.org>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>	<4823268D.1060602@egenix.com>	<c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>
	<mailman.963.1210573120.12834.python-list@python.org>
Message-ID: <4828071a$0$14343$e4fe514c@news.xs4all.nl>

Gabriel Genellina wrote:
>> 2008/5/8 M.-A. Lemburg <mal at egenix.com>:
>>
>>> SOAP would be a good choice if you want to send to data to other
>>> servers as well, e.g. Java-based ones.
>>>
>>> XML-RPC and JSON are better for simple data structures.
>>>
>>> If you have control over both client and server and don't
>>> need to bother with other backends or frontends, Python
>>> pickle is the best choice.
> 
> En Fri, 09 May 2008 05:41:07 -0300, Florencio Cano <florencio.cano at gmail.com> escribi?:
> 
>> I have control over agent and client but I'm not sure how to use
>> pickle for this task. Do you suggest to pickle the objects that I want
>> to send and send it over a usual socket? I have searched a bit in
>> Google and I have seen that Pickle is insecure by default. What do you
>> think about this?
> 
> "insecure" means that someone could build a specially crafted pickle able to run arbitrary code on the unpickling environment. One way to avoid that is to only accept pickles from trusted sources: using SSL by example.
> 

While Pyro (http://pyro.sourceforge.net) uses pickle by default, it is well understood 
that you'll have to deal with a potential security issue if your server is open to 
untrusted/uncontrolled clients.
Pyro provides several things that could help you here:
- you can define a connection authenticator that checks client IP and/or passphrases
- you can switch to an XML based serialisation protocol (courtesy of gnosis tools)
- you can run Pyro over SSL and let SSL deal with authentication/encryption/...

Cheers
Irmen de Jong


From ggpolo at gmail.com  Sat May 10 11:25:41 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 12:25:41 -0300
Subject: People still using Tkinter?
In-Reply-To: <a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
References: <mailman.896.1210396853.12834.python-list@python.org>
	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
Message-ID: <ac2200130805100825p34ceb43asc25286efa2ca2a40@mail.gmail.com>

2008/5/10 Zentrader <zentraders at gmail.com>:
> I like New Mexico Tech's site as well.  Also, take a look at the PMW
> extension for additional widgets, and TkTable and/or TableListWrapper.
> http://infohost.nmt.edu/tcc/help/pubs/tkinter/

There is also Tile, or Ttk since Tk 8.5, if you are interested in
extensions too.
Apparently there are three Tile wrappers now, two are incomplete
(sorry for saying that):

http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
of ttk styling, maybe other things and it is not only a ttk wrapper
(there are other things besides it)
http://bugs.python.org/file10010/Tile.py -- Missing several methods in
Treeview, big part of ttk styling and maybe something else.

And there is also one I'm doing, that I expect to be complete:

http://gpolo.ath.cx:81/projects/ttk_to_tkinter/

Documentation and samples are still lacking, but I'm working on them.
And I haven't tested it under Windows, so I invite you all to test it.

Regards,

-- 
-- Guilherme H. Polo Goncalves


From notbob at nothome.com  Thu May 22 12:29:37 2008
From: notbob at nothome.com (notbob)
Date: Thu, 22 May 2008 16:29:37 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com>
Message-ID: <RbhZj.1158$5u.1067@fe127.usenetserver.com>

On 2008-05-21, Paul Rubin <http> wrote:

> Knowing lots of languages is good for you.  php is probably your
> quickest route to getting a rudimentary web app running.  Python
> is a longer term project.  Do both.

Good advice.  Thank you.

nb


From pavlovevidence at gmail.com  Wed May 14 15:35:17 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 14 May 2008 12:35:17 -0700 (PDT)
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com> 
	<mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <7d28fc5b-4027-448a-bbff-b92b7aa149f2@x41g2000hsb.googlegroups.com>

On May 14, 11:07 am, Nikhil <mnik... at gmail.com> wrote:
> Christian Heimes wrote:
> > Ian Kelly schrieb:
> >> The purpose of obj.__len__() is to implement len(obj), which simply
> >> calls it.  So obj.__len__() may be faster, but only marginally.  The
> >> reason to prefer len(obj) is that if you inadvertently pass an object
> >> that does not implement __len__, you get the more appropriate
> >> TypeError rather than an AttributeError.
>
> > len(obj) is faster than obj.__len__() for several types like str. In
> > general len() is as least as fast __len__(). len() also does some extra
> > sanity checks.
>
> > python2.5 -m timeit "'abc'.__len__()"
> > 1000000 loops, best of 3: 0.453 usec per loop
>
> > python2.5 -m timeit "len('abc')"
> > 1000000 loops, best of 3: 0.292 usec per loop
>
> > Common code paths are already highly optimized. Don't try to be clever
> > unless you really understand what happens inside the interpreter. The
> > __internal__ methods are called magic methods for a reason. ;)
>
> > Christian
>
> Thanks for the useful insight.
> Then why to have __len__() internal method at all when the built-in
> len() is faster?
> I heard, in Python3, this internal method is being pruned/renamed to
> something else? Can someone please shed light here?

My advice is to think of len() as an operator.  Like other operators,
it can be overloaded using the __opname__ syntax:

-x calls x.__neg__
x+2 calls x.__add__
len(x) calls x.__len__

It's not really an operator: it's a regular built-in function, has no
special syntax, and no opcodes associated with it, but in sometimes it
helps to think of it as one.


Carl Banks


From conrad at lewscanon.com.invalid  Sun May 25 23:28:50 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Sun, 25 May 2008 23:28:50 -0400
Subject: blogs, longbets.org, and education of sociology
In-Reply-To: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <x8udnUDt0YLvs6fVnZ2dnUVZ_uidnZ2d@comcast.com>

xahlee at gmail.com wrote:
> For about the past 10 years, i [sic] have been 

saying things like

> ... fart ignorant ..., often in a
> irresponsible and carefree way.
...
> Some of these beer drinking f**kheads are simply being a asshole,
...
> vandalism. (the tech geekers use in-group slang for this: ?troll?.)

Actually, it's argot, not slang.  The definition is fairly narrow and well 
understood.

more obscenity:
> technology. (note: not reading more motherf**king slashdot or
> motherf**king groklaw or more great podcasts on your beatific language
> or your postmodernistic f**khead idols)

And the temerity of:
> (One thing you can do, is actually take a course on philosophy,
> history, law, economics, in your local community college.)

Yeah, those bastions of intellectual elitism.

Plonk, plonk, plonk.

-- 
Lew


From notnorwegian at yahoo.se  Mon May 19 18:28:48 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 15:28:48 -0700 (PDT)
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
Message-ID: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>

' '.join([`x  x` for x in range(1, 6)])

anyone can tell me what im doing wrong?


From gandalf at shopzeus.com  Mon May 12 02:42:01 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 12 May 2008 08:42:01 +0200
Subject: Is there no single/uniform RDBMS access API module for Python
 ?
In-Reply-To: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
Message-ID: <4827E6B9.3080509@shopzeus.com>

Banibrata Dutta ?rta:
> Hi,
>  
> Again a noob question.
>  
> Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is 
> it correct to conclude that there is no RDBMS agnostic, single/uniform 
> DB access API for Python ?
> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>  
> How is the RDBMS change handled for solutions which need to work with 
> different RDBMSs ??
http://www.python.org/dev/peps/pep-0249/



From skanemupp at yahoo.se  Mon May  5 07:09:53 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 04:09:53 -0700 (PDT)
Subject: pygame music, cant read mp3?
Message-ID: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>

http://www.pygame.org/docs/ref/mixer.html

import pygame

#pygame.mixer.init(frequency=22050, size=-16, channels=2,
buffer=3072)  //it complained abiout words=
so i guess its only the nbrs should be there//

pygame.mixer.init(22050, -16, 2, 3072)
pygame.mixer.music.load("example1.mp3")
pygame.mixer.music.play(loops=1, start=0.0)



Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
<module>
    pygame.mixer.music.load("example1.mp3")
error: Couldn't read from 'example1.mp3'


From gherron at islandtraining.com  Sun May 18 14:45:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 18 May 2008 11:45:32 -0700
Subject: Compress a string
In-Reply-To: <op.ubc28kc14fd8pl@mp1206-hp.config>
References: <op.ubc28kc14fd8pl@mp1206-hp.config>
Message-ID: <4830794C.4030309@islandtraining.com>

Matt Porter wrote:
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt

This is shorter and perhaps clearer:

def compress_str(str):
   new_str = ""
   for c in str:
     if not new_str  or  c != new_str[-1]:
       new_str += c
   return new_str


However, successive appends to a string is inefficient (whereas 
successive appends to a list are ok), so this is probably more efficient:

def compress_str(str):
   r = []
   for c in str:
     if not r  or  c != r[-1]:
       r.append(c) # Build a list of characters
   return ''.join(r)#  Join list into a single string


And then building a list in a loop is usually more efficient (and 
perhaps clearer) if done with a list comprehension:

  new_str = ''.join([c for i,c in enumerate(str)   if not i or str[i-1] 
!= c])

or, maybe clearer as two lines:

  r = [c for i,c in enumerate(str)   if not i or str[i-1] != c]
  new_str = ''.join(r)


Gary Herron








From gherron at islandtraining.com  Fri May  9 10:45:33 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 09 May 2008 07:45:33 -0700
Subject: Grabbing previous iteration in a dict
In-Reply-To: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>	<7xabizkdui.fsf@ruckus.brouhaha.com>
	<254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>
Message-ID: <4824638D.6080302@islandtraining.com>

dannywebster at googlemail.com wrote:
> On May 9, 10:48 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>   
>> dannywebs... at googlemail.com writes:
>>     
>>> I have a dictionary of which i'm itervalues'ing through, and i'll be
>>> performing some logic on a particular iteration when a condition is
>>> met with trusty .startswith('foo').  I need to grab the previous
>>> iteration if this condition is met.  I can do something with an extra
>>> var to hold every iteration while iterating, but this is hacky and not
>>> elegant.
>>>       
>> You cannot rely on the elements of a dictionary being in any
>> particular order (dicts are internally hash tables), so the above
>> is almost certainly ont what you want.
>>     
>
>
> Hi - thanks for your reply.  How about if I made the dict into a list
> (of
> which I have done).  How would I then reference the previous item?
> Can they
> be indexed?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Yes:

listOfItems = DICT.items()
for i in range(len(listOfItems)):
    k,v = listOfItems[i] # Current key,value pair
    if whatever:
        kPrev,vPrev = listOfItems[i-1]   # Previous key,value pair

Still, since there is no proscribed order in which the items are placed 
into the list, I wonder how this can be useful.   However, this *does* 
do what you asked.

Gary Herron



From castironpi at gmail.com  Fri May 16 15:04:30 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 12:04:30 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>

On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
>
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?- Hide quoted text -
>
> - Show quoted text -

What advantages do teams have? in what? over who? when?  If they have
any use at all,
what language is good for them?  How do programming teams interact?
It sounds fun.  I'm not sure I want to get work done so much as talk,
but programming is fun.

I'd start to discuss state property in appertanance to city property.
What are some properties of the state?

You would have to introduce a computer to a (finite?) way of
expressing language, provided it *expresses* at rates over time that
do not exceed its input (impression), and limited by the complexity
bound of the architecture.  Tangent: architecture complexity.

In order to recreate 'propositional knowledge', you have to tell it.
Accumulating could amount to hashing video feed over time.  What do
you know about what's on the screen?  Naturally, as symbols are
logical, the video would have to be of something you want from it,
even if it's high spirits.

I am less concerned about the audio, but maybe video is just one way
of learning.  What information do the mic inputs convey from a spoken
voice?  (And how do you summarize that?)

And what results are on video summaries are there so far?  I would
start with difference primitives on video.  How does the same work for
voice?

Of course, human understanding may come across the difference in form
of artifacts of hardware, but of course, the crossing operation is non-
trivial to perform, audio and video.  I'm not mentioning smell because
crossing it sounds risky.  Whaddya know.

Now creation and recreation *decompose* into creation and time, spec.
real iteration., but where I'm from, creation and time are known to
cross means; if I have inferred correctly so far, you want a computer
to recreate.  If so, you want creation in act to tell a story.  I
think it's more fun to make them up than tell computers, and if we're
by them, can we tell a story on a newsgroup?  Who understands best in
the cross-sum of { Newsgroup, Newsgroup + task, Computer }?  Who wants
to define cross-sum?


From wizzardx at gmail.com  Sun May  4 14:09:37 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:09:37 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
	<eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>
Message-ID: <18c1e6480805041109p6f2fc98agcd27c9a809fc94d@mail.gmail.com>

> What I want is display a window with a image, the user select a region of
> the image, and the region value is passed to my program, my program slice
> the image region, and analyze it.
>

If it's your apps own window, then getting a rectangle selected by the
user is simple.

1) Make skeleton x/gtk/wx/qt/etc app
2) Add code to show an image
3) Add code to capture mouse events
4) Add code to show the 'rubber band' rectangle over the mouse selection area
5) When the user releases the mouse, then extract the part of the
rectangle between where a mouse button was clicked and where it was
released.

All this would be in the docs for the Python x/gtk/wx/qt/etc libs.
Where is the difficulty?

David.


From mensanator at aol.com  Sun May 11 01:48:43 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 22:48:43 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com> 
	<da405010-4318-4f3e-9f33-001a4edcb662@k10g2000prm.googlegroups.com>
Message-ID: <d7837f5f-377e-4d9c-a696-963165648d5e@c58g2000hsc.googlegroups.com>

On May 11, 12:04?am, John Machin <sjmac... at lexicon.net> wrote:
> On May 11, 1:24 pm, Mensanator <mensana... at aol.com> wrote:
>
>
>
>
>
> > On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
>
> > >http://reddit.com/r/programming/info/18td4/comments
>
> > > claims people take a lot of time to write a simple program like this:
>
> > > "Write a program that prints the numbers from 1 to 100. But for
> > > multiples of three print "Fizz" instead of the number and for the
> > > multiples of five print "Buzz". For numbers which are multiples of
> > > both three and five print "FizzBuzz".
>
> > > for i in range(1,101):
> > > ? ? if i%3 == 0 and i%5 != 0:
> > > ? ? ? ? print "Fizz"
> > > ? ? elif i%5 == 0 and i%3 != 0:
> > > ? ? ? ? print "Buzz"
> > > ? ? elif i%5 == 0 and i%3 == 0:
> > > ? ? ? ? print "FizzBuzz"
> > > ? ? else:
> > > ? ? ? ? print i
>
> > > is there a better way than my solution? is mine ok?
>
> > Define better.
>
> > >>> f = ['','','Fizz']*100
> > >>> b = ['','','','','Buzz']*100
> > >>> for i in xrange(1,100):
>
> > ? ? ? ? fb = f[i-1]+b[i-1]
> > ? ? ? ? if fb=='':
> > ? ? ? ? ? ? ? ? print i
> > ? ? ? ? else:
> > ? ? ? ? ? ? ? ? print fb
>
> You seem to have an unfortunate fixation on 100. Consider changing the
> above instances to 34, 20, and 101.

Ok, I agree with 101, but I wouldn't necessarily
say the others were unfortunate. You might be
surprised at how often such fixations discover
bugs, something that I have a gift for.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 08:46:42 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 14:46:42 +0200
Subject: merging the global namespaces of two modules
In-Reply-To: <mailman.1469.1211449697.12834.python-list@python.org>
References: <mailman.1469.1211449697.12834.python-list@python.org>
Message-ID: <48356b20$0$19726$426a74cc@news.free.fr>

Fabrizio Pollastri a ?crit :
> Hi,
> 
> just an import problem:
> a program imports two modules, modA and modB, each module do not known 
> anything about the other module (i.e. no cross imports in them), both 
> modules needs to refer to some functions that are defined in the global 
> namespace of the other module. 

IOW, you have a circular dependency between modA and modB.

> There is a possible solution? 

The obvious one : extract the relevant functions from modA and modB into 
modC and import modC in both modA and modB.

If not applyable in your case, please provide more informations.



From ivan.illarionov at gmail.com  Sun May 25 17:30:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 21:30:19 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
Message-ID: <g1clpb$1pu0$1@news.mtu.ru>

On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
> Not at all.  I do it every day.
> 
> And BTW - yes, I write Python, also.  But I find I can write better,
> faster code in PHP.

I find I can write better code in Python. Maybe it's just a matter of 
personal preference?

> Do you write PHP?
I did. And I hated it very much. I hated it so much that even I had few 
Python scripts that generated PHP for me when it was possible.



From arnodel at googlemail.com  Mon May 19 12:04:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 17:04:58 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
Message-ID: <m2r6by8el1.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

[...]

> lambda is handy in defining parse actions in pyparsing.  Parse actions
> are callbacks to be run when an expression within a larger grammar is
> matched.  A common use for parse actions is to do some sort of text or
> type conversion.  The simplest parse actions are called using the list
> of matched tokens.  Here is a subexpression that will convert numeric
> strings found in a larger grammar to ints:
>
> integer = Word("0123456789").setParseAction(lambda tokens:
> int(tokens[0]) )

Could you use it as a decoratore instead?

integer = Word("0123456789")

@integer.setParseAction
def parse_integer(tokens):
    return int(tokens[0])

I could make your grammar clearer, because you don't mix it with
processing code... and no need for lambdas!

-- 
Arnaud


From thorsten at thorstenkampe.de  Fri May  2 13:55:04 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Fri, 2 May 2008 19:55:04 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <MPG.228573de113b22d798975b@news.individual.de>

* Ben Finney (Sat, 03 May 2008 00:37:45 +1000)
> Thorsten Kampe <thorsten at thorstenkampe.de> writes:
> > * Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> > > The OP was asking why people prefer on over the other. My answer
> > > is that I prefer specifying "give me the default OS Python"
> > > because anything not installed by the OS is to non-standardised
> > > for me to worry about.
> > > 
> > > Others may prefer something different, but then they get to wear
> > > whatever problems occur as a result of that choice. I continue to
> > > be bemused by that preference, and nothing that I've seen so far
> > > in this thread illuminates the issue more.
> > 
> > You're missing the point. Apart from the really dubious terms you
> > use ("OS installable package"), using env in the first line has
> > exactly the effect to use the default path of Python (which is the
> > first entry in your path)
> 
> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.

Again you're missing the point. If you or whoever installs Python (or 
another version of Python) to /usr/local/bin and puts this in the path 
to front (as it's often done) then /you/ want that Python to be the 
"default" one. It would just be silly to say "no, I the developer want 
/usr/bin/python".

So in general "#! env" is better while in certain circumstance 
hardcoding the path to /usr/bin/python can be better.


Thorsten


From miller.paul.w at gmail.com  Mon May 26 15:38:28 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:38:28 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org>
Message-ID: <c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>

I forgot to ask: what's your target platform?  I mentioned Organizer's
Database, but it only runs on Windows.  If you need a Linux or OS X
solution, then I can make another suggestion. :-)



From aahz at pythoncraft.com  Sun May 18 00:37:40 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:37:40 -0700
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0obqk$cus$1@panix3.panix.com>

In article <bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com>,
Rajarshi  <rajarshi.guha at gmail.com> wrote:
>
>Is there any list with people/groups/companies using Python for
>impressive things?
>
>Any pointers would be appreciated

And one more:

http://www.pythonology.com/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From celoserpa at gmail.com  Fri May  9 10:30:42 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Fri, 9 May 2008 11:30:42 -0300
Subject: Newbie to python --- why should i learn !
In-Reply-To: <83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>
Message-ID: <1e5bcefd0805090730i5f5905dcrcd0f0792b2b94f0e@mail.gmail.com>

I sincerely think that most languages in existence today have its place.
Java has some great libraries and programs that were written in it. Try
writing an Eclipse clone in Python, I don't think it would go well.



On Fri, May 9, 2008 at 11:08 AM, hdante <hdante at gmail.com> wrote:

> On May 8, 7:25 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
> wrote:
> > Hi,
> >
> > i was reading/learning some hello world program in python.
> > I think its very simillar to Java/C++/C#. What's different (except
> > syntax) ?
>
>  All the languages have similar "power", in a theoretical sense. If
> you can solve a problem with one, most of the time you'll be able to
> solve it with the other. So we could say that the languages are
> "equal".
>
>  However, in practice, the syntax matters a lot. For example, they
> will influence on the maintainability and the performance of your
> application.
>
> >
> > what can i do easily with python which is not easy in c++/java !?
>
>  Pretty much everything. Python syntax is minimalist, so it requires
> much less code. There are many examples in Wikipedia, for example:
>
>
> http://en.wikipedia.org/wiki/User_datagram_protocol#Sample_code_.28Python.29
>  http://pt.wikipedia.org/wiki/Radix_sort#C.C3.B3digo_em_Java
>  http://en.wikipedia.org/wiki/Observer_pattern#Python
>
>  etc.
>
> >
> > Tnx,
> > Raxitwww.mykavita.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From gagsl-py2 at yahoo.com.ar  Thu May 15 22:19:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 23:19:08 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
Message-ID: <op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 22:44:17 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> @Gabriel: I understand what you are saying. It all depends on what you  
> want
> to test. In this case, I wanted to test the algorithm of the method.  The
> test_generate_chat_dir_string is meant to do just that: Check if the
> generate_chat_dir_string generated a "valid" (according to the specs)  
> string
> for a "chat dir name".

That depends on what you consider "valid". Just duplicating the function  
code in the test is absurd and pointless. Of course it will pass now -  
you're executing the same code! On the other hand, what if you later want  
to replace the algorithm and use SHA1 instead of md5? The test will fail  
then - but do you *actually* care whether it actually returns the md5  
digest or something else?
If you *do* care, then you should compute the output by hand (or assume it  
is correct *now*) and hard code THAT string in the test, not recompute it  
again.
If you *don't* care, then follow the steps I outlined in the previous  
message: just ensure that different inputs give different outputs.

> It is not a integration nor a functional "unit" test, but it is a "real"
> unit test in the sense that I created a test for each method and I  
> exercised
> the methods the following way:
>
>  1) Got some data to test and...
>  2) ... Generated an output "manually" in the test method that I knew  
> were
> the expected return of the tested method;
>  3) Fed this data to the tested method and compared the manually  
> generated
> result with the return value of the method.
>
> It is like testing a method that does a simple division:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = 5
>   self.assertEquals(mathprogram.divide(dividend,divisor),5)

Mmm, no, your posted example was more like this:

def test_divide
    divdend = 10
    divisor = 2
    expected_result = dividend/divisor
    self.assertEquals(mathprogram.divide(dividend,divisor), 5)

You *computed* the expected result using (presumably) the same code as the  
tested function.

> The techniques you explained in your message sound more like functional
> testing or integration + functional testing where multiple aspects of a
> single functional unit are being exercised. Or am I wrong?

I'd say they are still unit tests. I'm testing a single function,  
comparing the expected output with the actual output. But I only check the  
*public* interfase of the function, what their users expect from it (its  
contract, if you want); I don't check the internal implementation.
The real value of unit tests comes when you want to modify something, or  
reimplement it. You must ensure that you don't break other things. With a  
too strict test very tied to the current implementation, you can't change  
anything.

-- 
Gabriel Genellina



From mathieu.prevot at ens.fr  Wed May 28 09:06:42 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Wed, 28 May 2008 15:06:42 +0200
Subject: Flash Decoder
In-Reply-To: <d9cc94780805280516h6db1300cg5fcf4bb068b37075@mail.gmail.com>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<mailman.1682.1211974876.12834.python-list@python.org>
	<0c0ea160-89d6-4827-8d54-d0029d064c71@w5g2000prd.googlegroups.com>
	<3e473cc60805280511o6cf0e639lfdfc2d1ea8902300@mail.gmail.com>
	<d9cc94780805280516h6db1300cg5fcf4bb068b37075@mail.gmail.com>
Message-ID: <3e473cc60805280606g5661dbddocc23012c64079764@mail.gmail.com>

2008/5/28 ankit anand <ankitanand1986 at gmail.com>:
> hmm i am more interested in .swf format and more specifically i would like
> to have all the pixel values of all the frames can i do that using this
> library?

Not with ffmpeg. You can check out the code from Gnash [1] or Swfdec
[2] or start you swf decoder from scratch using Adobe specification
[3] on the swf format.

Happy coding !
Mathieu

[1] http://en.wikipedia.org/wiki/Gnash
[2] http://en.wikipedia.org/wiki/Swfdec
[3] http://www.adobe.com/devnet/swf/


From ZeeGeek at gmail.com  Sun May  4 11:59:05 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Sun, 4 May 2008 08:59:05 -0700 (PDT)
Subject: default gettext localedir on windows
Message-ID: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>

Hi, what's the default localedir for gettext module on windows? In
Linux, it's /usr/share/locale. Where should I put the *.mo file in
order to make the translation work?

Thanks.


From tjreedy at udel.edu  Fri May  9 15:35:12 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:35:12 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
Message-ID: <g0291d$g8d$1@ger.gmane.org>


"Lou Pecora" <pecora at anvil.nrl.navy.mil> wrote in message 
news:pecora-DFE713.11234209052008 at ra.nrl.navy.mil...
| In article <mailman.825.1210293599.12834.python-list at python.org>,
| "Terry Reedy" <tjreedy at udel.edu> wrote:
|
| > "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message
| > news:200805081914.06459.kyrie at uh.cu...
| > | Btw, there seems to be a math problem in python with 
exponentiation...
| > | >>> 0**0
| > | 1
| > | That 0^0 should be a nan or exception, I guess, but not 1.
| >
| > a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
| > But there are unenlighted people who agree with you ;-)
| > Wikipedia has a discussion of this.
| >
| > tjr
|
| I like that argument better.  But...
|
| I've also heard the very similar a**b is a multiplied by a b-1 times.

Me too, in school, but *that* definition is incomplete: it excludes b=0 and 
hence a**0 for all a.  It was the best people could do before 0 was known.
But 0 was introduced to Europe just over 800 years ago ;-)

In general, sequence reduction work better if the base case is given 
separately rather that defined as the first member of the sequence (which 
excludes empty sequences!).
ab = [a]*b # b a count
a**b  = reduce(int.__mul__,  ab, 1) # better
a**b = reduce(int.__mul__, ab[1:], a) # crashes for b=0

Consider the equivalent pair of definitions for a*b:
a*b = 0 incremented by a, b times = reduce(int.__add__, ab, 0)
a*b = a incremented by a, b-1 times = reduce(int.__add__, ab[1:] a)

Since we have 0, the second, which excludes (crashes on) a*0 ,
is incomplete.

Terry Jan Reedy





From deets at nospam.web.de  Fri May 23 05:53:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 11:53:32 +0200
Subject: can python do some kernel stuff?
In-Reply-To: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
Message-ID: <69nigsF3499pqU2@mid.uni-berlin.de>

Jimmy schrieb:
> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>> Jimmy wrote:
>>> Hi to all
>>> python now has grown to a versatile language that can
>>> accomplish tasks for many different purposes. However,
>>> AFAIK, little is known about its ability of kernel coding.
>>> So I am wondering if python can do some kernel coding that
>>> used to be the private garden of C/C++. For example, can python
>>> intercept the input of keyboard on a system level? someone told me
>>> it's a kernel thing, isn't it?
>> http://wiki.python.org/moin/elmer
> 
> well, straightly speaking, how can I know a key is pressed on a system-
> level if
> using python?

What has that todo with kernel programming? You can use e.g. pygame to 
get keystrokes. Or under linux, read (if you are root) the keyboard 
input file - I've done that to support several keyboards attached to a 
machine.

And the original question: no, python can't be used as kernel 
programming language. Amongst other reasons, performance & the GIL 
prevent that.

Diez


From jstucklex at attglobal.net  Sun May 25 17:09:43 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 17:09:43 -0400
Subject: php vs python
In-Reply-To: <g1cjnb$1p57$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
Message-ID: <Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
> [...]
>> A quick look at the revision log:
>>
>> http://byteflow.su/log/
>>
>> reveals that the initial commit of 60 or so files has been done on
>> 08/14/07
>> (10 months ago), a second developer came on board 12/01/07 (seven+
>> months ago),
>> a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
>> (also
>> six+ months ago).  There are at least nine discernible contributors
>> overall.
>> Say what you will, but it still looks an awful lot like like two man-
>> years,
>> Django or no Django...
> 
> I bet that if they did this with PHP framework they where far from where 
> they are now.
>

Yep, I'd bet they would be much further along.

> I didn't say that it's not possible to write good code in PHP, I said 
> that Python and Django encourage cleaner code more than PHP and PHP 
> frameworks do. 
> 

I repeat.  The language has nothing to do with it.  Good programmers 
write good code.  Lousy programmers write bad code.

> IMHO Python language is better designed and this influences everything 
> written in it.
>

A lot of people don't share the opinion that it is "better designed".

> Yes, it's possible to write something clean in PHP but it would require a 
> lot more work.
> 

Not at all.  I do it every day.

And BTW - yes, I write Python, also.  But I find I can write better, 
faster code in PHP.

Do you write PHP?

> Ivan
> 
> 


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From hdante at gmail.com  Tue May  6 10:17:15 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 07:17:15 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <486da6f2-d1be-4637-af5f-01d5924ced04@2g2000hsn.googlegroups.com>

On May 6, 10:44?am, jmDesktop <needin4mat... at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces. ?Is
> that correct? ?Is my schooling for nought on these OOP concepts if I
> use Python. ?Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.) ?I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost. ?Thank you.

 Python supports interfaces. In the example below, "Vehicle" is an
interface.

class Vehicle:
     def drive(self, count): raise Exception("I'm only an
interface... :-(")
     def number_of_wheels(self): return 0
     def fly(self): pass

class Car(Vehicle):
     def drive(self, count): print "The car walked %d steps" % count
     def number_of_wheels(self): return 4

 As you can see, there are a couple of ways you can tell others
"Vehicle" is an interface, like raising exceptions, returning useless
values or doing nothing. You could also raise an exception in
Vehicle.__init__.



From hniksic at xemacs.org  Fri May  9 05:38:56 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 09 May 2008 11:38:56 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de>
	<8763tofpiv.fsf@mulj.homelinux.net>
	<68i084F2su97jU4@mid.uni-berlin.de>
Message-ID: <87y76jx1e7.fsf@mulj.homelinux.net>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

>> Of course, if it makes sense to pickle sockets in the application, one
>> is can do so by defining __getstate__ and __setstate__:
>
> When does it make sense!?

When recreating the object from on-disk state requires reestablishing
the communication, as the example shows.  I'm not saying that doing
that is always a good idea, only that it can be done if/when needed.

> But if you unpickle it while the original connection is still open it
> can't connect.

Why not?  I was thinking "client socket", not "server socket".


From ptmcg at austin.rr.com  Tue May 20 11:54:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 08:54:39 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<m2tzgt6m4n.fsf@googlemail.com>
Message-ID: <86e5f3b2-d1ae-414f-976e-062e7a293c9b@25g2000hsx.googlegroups.com>

On May 20, 10:17?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Paul McGuire <pt... at austin.rr.com> writes:
> > On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> >> I posted this code last night in response to another thread, and after I
> >> posted it I got to wondering if I had misused the list comprehension. Here's
> >> the two examples:
>
> >> Example 1:
> >> --------------------
> >> def compress(s):
> >> ? ? new = []
>
> >> ? ? for c in s:
> >> ? ? ? ? if c not in new:
> >> ? ? ? ? ? ? new.append(c)
> >> ? ? return ''.join(new)
> >> ----------------------
>
> >> Example 2:
> >> ------------------------
> >> def compress(s):
> >> ? ? new = []
> >> ? ? [new.append(c) for c in s if c not in new]
> >> ? ? return ''.join(new)
> >> --------------------------
>
> >> In example 1, the intention to make an in-place change is explicit, and it's
> >> being used as everyone expects it to be used. In example 2, however, I began
> >> to think this might be an abuse of list comprehensions, because I'm not
> >> assigning the result to anything (nor am I even using the result in any
> >> way).
>
> >> What does everyone think about this? Should list comprehensions be used this
> >> way, or should they only be used to actually create a new list that will
> >> then be assigned to a variable/returned/etc.?
>
> > Why not make the list comp the actual list you are trying to build?
>
> > def compress(s):
> > ? ? seen = set()
> > ? ? new = [c for c in s if c not in seen and (seen.add(c) or True)]
>
> <split hairs>
> Isn't
>
> ? ? c not in seen and (seen.add(c) or True)
>
> the same as
>
> ? ? seen.add(c) or c not in seen
>
> ?
>
> > ? ? return ''.join(new)
>
> (notice I haven't closed the tag!)
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -

Unfortunately, no.  "seen.add(c) or c not in seen" will never return
true, since c gets added to seen before testing if c in seen.

-- Paul


From pavlovevidence at gmail.com  Tue May 27 03:03:53 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 27 May 2008 00:03:53 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net>
Message-ID: <62ed1093-7d90-4fc6-b1b9-0edd3d1e1042@26g2000hsk.googlegroups.com>

On May 27, 2:42 am, "inhahe" <inh... at gmail.com> wrote:
> Well, I just need it once in a while.  Actually now is the only time I
> remember.  The last time what I needed was a file name extension.  I want a
> string called headers, but I want to derive a dict from it, also called
> headers.  So I figured the string would be called strHeaders, and the dict,
> dctHeaders probably, but when a precedent for something like that exists, I
> like to use it.


I doubt there's anything canonical since Python community, PEP 8, and
Python's dynamic typing all discourage its use.  I would venture to
say that the community would frown upon names such as "strHeaders"
since they don't agree with the naming conventions in PEP 8.  Instead,
use "str_headers" and "dict_headers".  Better yet, use "headers_str"
and "headers_dict".  Put the less important information last.


Carl Banks


From fc14301589 at icqmail.com  Sat May 31 14:48:28 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sun, 01 Jun 2008 02:48:28 +0800
Subject: File browser in python gui
References: <4841353e_1@news.tm.net.my> <g1rnuq$fqj$03$1@news.t-online.com>
Message-ID: <48419d7c_2@news.tm.net.my>

On 22:39, sabato 31 maggio 2008 Sebastian 'lunar' Wiesner wrote:

> What about QtGui.QFileDialog?

Yeah! Thank you!
So strange that I was looking for all around and it was already in my
computer.
I'm gonna back to study a little function that will return an existing/new
file or None (if Cancel is pressed)
-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From stefan_ml at behnel.de  Thu May 29 04:54:01 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 29 May 2008 10:54:01 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <483E6F29.8000805@behnel.de>

loial wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.

   lines_in_file2 = set(open("file2").readlines())
   for line in open("file1"):
       if line not in lines_in_file2:
           print line

Stefan


From hdante at gmail.com  Wed May 14 21:29:54 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 01:29:54 +0000 (UTC)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
	<f0312987-5aba-4c1d-8fcc-354e59cf5b5c@i76g2000hsf.googlegroups.com>
Message-ID: <g0g3mi$993$1@ger.gmane.org>

Em Wed, 14 May 2008 10:01:40 -0700, castironpi escreveu:

> On May 14, 11:58?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> 
> Love them opticals.

 Testing. :-P




From wuwei23 at gmail.com  Sat May 17 21:08:25 2008
From: wuwei23 at gmail.com (alex23)
Date: Sat, 17 May 2008 18:08:25 -0700 (PDT)
Subject: multiple databases, what's the best interface ?
References: <mailman.1279.1211050480.12834.python-list@python.org>
Message-ID: <325c024f-2bc2-40e5-85ac-cefb99a85709@w34g2000prm.googlegroups.com>

On May 18, 4:54 am, Stef Mientki <stef.mien... at gmail.com> wrote:
> What's the best interface so I can use the same program for all databases,
> and just have to change the database name, if I want to use another
> database ?

I really like sqlalchemy: http://www.sqlalchemy.org/features.html

- alex23


From mnikhil at gmail.com  Tue May 20 14:12:13 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:42:13 +0530
Subject: preserve history in the interactive python
Message-ID: <g0v49v$2ab$1@registered.motzarella.org>

Hi,

I am using python -i, and I find it hard typing/pasting the commands 
from the previous interactive shell. Basically, is there anyway that I 
can preserve the history in the shell?
I guess but not sure there should be something like ~/.pyrc for 
configuring such but can someone please let me know what is the 
effective environment variable to preserve the history?

Thanks,
Nikhil


From miller.paul.w at gmail.com  Sun May 25 19:19:37 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 16:19:37 -0700 (PDT)
Subject: Performance of Python builtins
Message-ID: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>

Is there any place outside the actual C source for Python that has
information about the performance of Python's built-in operations? For
example, I'd *expect* list.append to be O(1), and I hope that list[i]
is O(1), but I don't really know that for sure, since it would depend
a lot on the internal implementation.

I'm really only asking this for curiosity's sake --- more as a
reasonable, non-trollish version of the "Python is slow" post than
anything. :-)  I've never really had any problems with the performance
of Python code that I couldn't solve by either changing my algorithm
or, if all else has truly failed, rewriting in C or Pyrex.

What I'd like to see is something like http://svn.python.org/projects/python/trunk/Objects/listsort.txt
where Python's sorting algorithm is described, except with the focus
on other built-in constructs.

Thanks!


From wxPythoner at gmail.com  Sat May 10 16:56:39 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:56:39 -0700 (PDT)
Subject: Python doesn't recognize quote types
Message-ID: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>

There's a thing that bugs me in Python. Look at this...

>>> print "Testing\"
SyntaxError: EOL while scanning single-quoted string


Please focus on the part of the error message that states "while
scanning single-quoted string". How can Python claim it scanned a
single-quoted string when I fed it with a double-quoted string? Is
quote type (single quote and double quote) recognition not implemented
in Python?


From sumon.sadhu at gmail.com  Thu May  8 19:44:41 2008
From: sumon.sadhu at gmail.com (Sumon Sadhu)
Date: Thu, 8 May 2008 16:44:41 -0700
Subject: Write a python blog/website?
In-Reply-To: <880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
	<880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
Message-ID: <0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>

Hey Dotan,

My apologies if this post caused offense. Your assertion is right,  
maybe i should have emailed everyone individually like i've done with  
the first 45 sites, but it was never my intention to spam.

We're programmers like yourself, trying to build something that  
provides a lot of benefit. You can see our intentions are genuine  
(and our python ad server was fun to build)

So while i appreciate your response, it was never my attention to be  
"spammy"

Thanks,

- Sumon

On 8 May 2008, at 15:56, Dotan Cohen wrote:

> 2008/5/8 sharpshoot <Sumon.Sadhu at gmail.com>:
>> Hi Guys,
>>
>> I thought this would be really interesting to people who blog who
>> might be able to help us.
>
> Your proposal very well may be interesting to those who might be able
> to help you, yet, you dug your own grave by spamming the Python list.
> I see that your intentions were honest, but your post was unsolicited
> advertising, and off-topic at that.
>
> I don't 'blog'. I write web content. I have rather impressive traffic
> at some sites and your advertising seems to fit at least two or three
> medium-traffic sites I maintain. I won't experiment with the
> advertising on the large sites until I see results at the smaller ones
> first. However, snaptalent.com stands out as a spammer. I most
> certainly will not do business with spammers, and I am willing to
> sacrifice my bottom line to avoid making spammers richer. That's too
> bad, as there are many more effective ways that you could have reached
> me and others like me. The two or three fish you will net spamming the
> python list will not be worth your bad name, I assure you.
>
> Dotan Cohen
>
> http://what-is-what.com
> http://gibberish.co.il
> ?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?- 
> ?-?-?-?-?
>
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?



From mensanator at aol.com  Fri May  2 16:47:39 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 13:47:39 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
	<9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>
	<m2wsmca4n4.fsf@googlemail.com>
Message-ID: <e04036c9-aab3-4254-bdce-83236fd1bead@l64g2000hse.googlegroups.com>

On May 2, 2:26?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Mensanator <mensana... at aol.com> writes:
> > On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
> >> Mensanator wrote:
> >> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
> >> >> Shawn Milochik wrote:
> >> >>> How does one "plonk" stuff from Google Groups? Specifically, how
> >> >>> can this be done in Gmail?
> >> >> Set up a filter that looks for some phrase in the mail headers that
> >> >> identifies messages originating from google groups. ?Gmail's filters are
> >> >> fairly flexible. ?I'd probably just have it look for certain words.
> >> >> Look at an e-mail's source (raw view) and particularly check in the
> >> >> headers for things to filter by.
>
> >> > Why don't you just block all messages from Gmail?
>
> >> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
> >> (implying it's use for his own posting and viewing the list) that would
> >> work splendidly for him! ?Or not.
>
> >> Of course you're not likely to see this message either since I and many
> >> folks on here post from gmail.
>
> >> Spam comes mainly from Google Groups, not as much from Gmail in my
> >> experience.
>
> > I didn't say it was POSTED from gmail, but the spammers often have
> > gmail addresses, to wit:
>
> You're confusing gmail addresses and Google Groups
> (groups.google.com),

No, I'm not.

> which can be used as a web interface to usenet
> and mailing lists. ?

Read again what I wrote.

> Look at the 'Organisation' header of the messages
> you quote.
>
> It seems most of the spam on comp.lang.python is posted from Google
> Groups, *including* the one with a 'From' header which is not a gmail
> address.

To post from Google Groups, don't you need a legitimate e-mail
address?

Why does Gmail allow spammers to have e-mail accounts?

They are as much to blame as Google Groups.

>
> So it would be more efficient

And thus, stupid.

> to block messages posted from Google
> Groups than the ones from gmail addresses.
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -



From workitharder at gmail.com  Sat May 24 02:15:00 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:15:00 -0700 (PDT)
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com> 
	<4837225e$0$5507$9b622d9e@news.freenet.de>
	<jNHZj.147601$Tj3.61085@en-nntp-02.dc1.easynews.com>
Message-ID: <0f6bda3c-94c1-483b-893f-988315244a6f@p25g2000pri.googlegroups.com>

On May 23, 3:44?pm, "Joel Koltner" <zapwireDASHgro... at yahoo.com>
wrote:
> ""Martin v. L?wis"" <mar... at v.loewis.de> wrote in messagenews:4837225e$0$5507$9b622d9e at news.freenet.de...
>
> > Try all three of them, in sequence:
>
> Thanks, will do.
>
> > If you absolutely don't want to import test, write
>
> I can live with the import, I just don't want to have to type out the full
> names all the time.
>
> ---Joel

t = reload(test).testFunc
t()


From wuwei23 at gmail.com  Mon May 12 22:52:45 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 19:52:45 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <968dc79b-f0ae-4505-867e-83801870af2f@z16g2000prn.googlegroups.com>

<bruno.desthuilli... at gmail.com> wrote:
> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

Try taking a look at the level of discourse in the Google App Engine
group.

It's pretty clear that some - let's say "developers" rather than
"programmers" - developers are simply interested in acquiring usage
patterns for the particular language they're required to develop in.
Being able to extend existing patterns or create new solutions is
completely outside of their scope of interest or ability. My
'favourite' is the "how do I do x?", "can you show me a working
example?", "can you add your example to my code?" sequence, you see a
lot of that.

I'd honestly expect a lot of the current GAE group posters to fail the
FizzBuzz test, especially given that an amazing number of them seem to
be constantly griping about not being able to run production code on
what is currently only a preview framework.

- alex23


From george.sakkis at gmail.com  Wed May 28 17:58:54 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 28 May 2008 14:58:54 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
Message-ID: <d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>

On May 28, 5:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> > Kind of like how this year's program won't work on next year's
> > Python?
>
> For somebody who has admitted to have only very rudimentary knowledge of
> python that's a pretty bold statement, don't you think?
>
> >  Except Flaming Thunder is faster. ;)
>
> Faster in execution speed for a very limited domain of problems - maybe.
>
> But unless it grows support for structured data types, arrays and maybe
> even an object system - it's nothing but a toy language.

I wouldn't even call it a toy language, it seems more like a sandbox
for fumbling around in compiler technology and language
"design" (loosely speaking). Fun as a research or alpha-stage project
but nowhere near production-ready.

To be fair, the graphics look cool and the "single-asset 8-by-8
shotgun cross compiler, written entirely in assembly language" sounds
impressive from an implementation point of view, in the sense that
building Deep Blue with nothing but NAND gates would; utterly
impressive and pointless at the same time. Which goes to prove that
hardcore hackers don't necessarily make decent language designers.

George


From fetchinson at googlemail.com  Sat May 10 22:35:39 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Sat, 10 May 2008 19:35:39 -0700
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <fbe2e2100805101935y6f2613cu59fa7bfe3eef21b2@mail.gmail.com>

I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
>    #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?



IMHO it's perfectly okay to use it as you describe it. Maybe you can switch
to xrange( ) which doesn't return a list but an iterator. Note that in
python 3.0 xrange will cease to exist and range( ) will return an iterator
instead.

Cheers,
Daniel

-- 
http://www.cafepress.com/putitdown
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From fiacre.patrick at gmail.com  Fri May 23 06:02:51 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 06:02:51 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
Message-ID: <4836964c$0$25057$607ed4bc@cv.net>

Jimmy wrote:
> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>> Jimmy wrote:
>>> Hi to all
>>> python now has grown to a versatile language that can
>>> accomplish tasks for many different purposes. However,
>>> AFAIK, little is known about its ability of kernel coding.
>>> So I am wondering if python can do some kernel coding that
>>> used to be the private garden of C/C++. For example, can python
>>> intercept the input of keyboard on a system level? someone told me
>>> it's a kernel thing, isn't it?
>> http://wiki.python.org/moin/elmer
> 
> well, straightly speaking, how can I know a key is pressed on a system-
> level if
> using python?

http://docs.python.org/lib/module-curses.html

Unless you are using an ancient piece of hardware -- a terminal is a 
pseudo terminal and a key stroke isn't a kernel event at all.

If you were looking for examples of kernel level functions you might 
want to consider driver interfaces -- how to program device interfaces 
-- that, too, can be done in Python -- but, again, you are always 
calling some underlying C function exposed via SWIG or another cross 
compilation tool.  Python doesn't reinvent system calls!  :-)


From alan.wright at volubill.com  Wed May 21 06:44:48 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 11:44:48 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net><mailman.1364.1211234091.12834.python-list@python.org><D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
	<mailman.1367.1211240706.12834.python-list@python.org>
Message-ID: <iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>

Same on FC8, sends RST after it sees SYN/ACK

"Ghirai" <ghirai at ghirai.com> wrote in message 
news:mailman.1367.1211240706.12834.python-list at python.org...
> On Mon, 19 May 2008 23:50:50 +0100
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Ghirai,
>> Scapy does the same, only it sends RST and not FIN, so still no help
>>
>>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
>>
>> Only have windows at the moment sadly.
>>
>> Alan
>>
>
> Are you sure there's no firewall or something else between you and the
> remote host?
>
> Because i just tried that command with scapy and it didn't send any other 
> packets
> except what it was told (1 packet with SYN flag set).
>
> I haven't tried on windows though.
>
> -- 
> Regards,
> Ghirai. 




From cameronlarue at gmail.com  Fri May 30 15:50:43 2008
From: cameronlarue at gmail.com (Cameron)
Date: Fri, 30 May 2008 12:50:43 -0700 (PDT)
Subject: accumulator generators
Message-ID: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>

I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
Graham article</a> and he builds an accumuator generator function in
the appendix. His looks like this:

<pre>
def foo(n):
  s = [n]
  def bar(i):
    s[0] += i
    return s[0]
  return bar
</pre>

Why does that work, but not this:

<pre>
def foo(n):
  s = n
  def bar(i):
    s += i
    return s
  return bar
</pre>


From info at thegrantinstitute.com  Fri May 16 16:34:58 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 16 May 2008 13:34:58 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080516133458.D51242FB142EC022@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080516/2b221710/attachment-0001.html>

From tjreedy at udel.edu  Sun May 25 12:59:17 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 12:59:17 -0400
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
Message-ID: <g1c5t4$2tt$1@ger.gmane.org>


"Rares Vernica" <rares at ics.uci.edu> wrote in message 
news:y1r1w3qan3p.fsf at ics.uci.edu...
| >>> l=list(s)
| >>> l.sort()

This can be condensed to l = sorted(s)

| >>> l
| ['a', 'b', 'c']





From bruno.desthuilliers at gmail.com  Mon May 19 16:35:55 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:35:55 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
Message-ID: <21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>

On 19 mai, 18:11, Henrique Dante de Almeida <hda... at gmail.com> wrote:
> On May 19, 7:03 am, Bruno Desthuilliers <bruno.
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Vicent Giner a ?crit :
>
> > > Hello.
>
> > > I am new to Python. It seems a very interesting language to me. Its
> > > simplicity is very attractive.
>
> > > However, it is usually said that Python is not a compiled but
> > > interpreted programming language
>
> > cf my answer to you and Henrique on this.
>
> > > I am working on my PhD Thesis, which is about Operations Research,
> > > heuristic algorithms, etc., and I am considering the possibility of
> > > programming all my algorithms in Python.
>
> > > The usual alternative is C,  but I like Python more.
>
> > Then use it.
>
> > > The main drawbacks I see to using Python are these:
>
> > > * As far as I understand, the fact that Python is not a compiled
> > > language makes it slower than C, when performing huge amounts of
> > > computations within an algorithm or program.
>
> > In which way is this a problem here ? I thought your thesis was about
> > algorithm, not about implementation optimisation ? And if it's the
> > later, then even C might sometimes be too high level - you should drop
> > to assembly language.
>
> > > * I don't know how likely it is to find libraries in Python related to
> > > my research field.
>
> > I can't tell but you'd be surprised by the quantity of available Python
> > libs.
>
> > > * I know Python is a "serious" and mature programming language, of
> > > course. But I do not know if it is seen as "just funny" in a research
> > > context. Is Python considered as a good programming language for
> > > implementing Operations Research algorithms, such as heuristics and
> > > other soft-computing algorithms?
>
> > Don't know if this answers your question, but it seems that at least
> > some authors consider it a good choice:http://www.oreilly.com/catalog/9780596529321/
>
> > All code examples in this books are in Python - very badly written
> > Python, alas...
>
> > > Maybe this is not the right forum, but maybe you can give me some
> > > hints or tips...
>
> > Hem... Obviously, most people here will have a little biased, you know ?-)
>
>  I agree with what most people here said, that the language doesn't
> really matter, etc., but that simply does not apply to the specific
> case of optimization research.
>
>  The little I know about optimization, even trivial problems may be
> hairy problems. Na?ve implementations simply don't finish and the
> performance bottlenecks are not necessarily in the numeric computation
> algorithms (so numpy doesn't help much here). If the guy is doing
> research on that, it possible that he will work with thousands (or
> millions) of weird constraints.
>
>  I'm pretty sure about that: when the algorithms take 4 hours to test
> a single execution, you value processor time.

I'm no expert here, but this sounds like a sensible argument to me.

OTHO, if the OP ends up spending more time writing boilerplate code
and fighting with gory implementation details than working on the
algorithm themselves, he might find than relative difference between
two possible algorithms (like one takes 4 hours and the second take 2
1/2 hours, but each took less than one hour to implement) is much more
important than having the first one taking 4 minutes, the second 2 1/2
minutes, and each having take 15 days to write and debug...

>  The situation would be simpler if there were good well-known toolkits
> for optimization in python (like numpy for matrix operations), but
> that's not the case.

There's at least Psyco (if you're willing and able to restrict
yourself from using some of the most dynamic parts of Python - which
might not be a problem here).  One could also mention stuff like Pyrex
and Cython.


From PurpleServerMonkey at gmail.com  Sat May 24 05:38:00 2008
From: PurpleServerMonkey at gmail.com (PurpleServerMonkey)
Date: Sat, 24 May 2008 02:38:00 -0700 (PDT)
Subject: Python, Daemons and D-Bus
Message-ID: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>

Seeking feedback from group members on a design I'm looking at using
in a project.

I've created an XML-RPC server and a number of Daemons, the idea is
that the XML-RPC server gets a request from a user interface of some
sort and then sends data to the Daemon processes to do work. Daemons
will also need to feed back task information to the XML-RPC server.

For the communications between the Daemons and XML-RPC server I was
thinking of using D-Bus (The project is for Linux and *BSD) but wanted
to hear what others thought of the idea?

Would you use D-Bus or a more traditional IPC method such as sockets?
Although D-Bus is relatively new it looks interesting, just not sure
it would work well in this kind of project.

Thanks in advance for your thoughts and opinions.


From johnjsal at NOSPAMgmail.com  Tue May 20 13:22:28 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:22:28 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
Message-ID: <027e0bd9$0$26878$c3e8da3@news.astraweb.com>

"Paul McGuire" <ptmcg at austin.rr.com> wrote in message 
news:b56a93ee-b177-44fb-927a-1e204f491639 at t54g2000hsg.googlegroups.com...
On May 20, 10:50 am, s0s... at gmail.com wrote:
> def compress(s):
> return list(set(s))
>
> That does the trick.

Wow, I just *knew* there had to be some built-in function that would make 
this problem trivial! :)

Only if order does not need to be maintained.  list(set(s)) will not
necessarily keep the unique characters in the order they are seen.
We'll have to check with the OP to see if this is important (I just
assumed that it was because of the use of list comps).

Good point. For me it doesn't matter because it wasn't my problem 
originally. I just had a question about the list comp. But if order matters, 
then I guess set doesn't work? 




From robert.kern at gmail.com  Thu May  8 18:22:58 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 08 May 2008 17:22:58 -0500
Subject: python vs. grep
In-Reply-To: <bQKUj.8781$0L.2506@trnddc07>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<bQKUj.8781$0L.2506@trnddc07>
Message-ID: <fvvug2$l70$1@ger.gmane.org>

Alan Isaac wrote:
> Anton Slesarev wrote:
>> I've read great paper about generators:
>> http://www.dabeaz.com/generators/index.html Author say that it's easy 
>> to write analog of common linux tools such as awk,grep etc. He say 
>> that performance could be even better. But I have some problem with 
>> writing performance grep analog. 
> 
> https://svn.enthought.com/svn/sandbox/grin/trunk/

As the author of grin I can definitively state that it is not at all competitive 
with grep in terms of speed. grep reads files really fast. awk is probably 
beatable, though.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From ivan.illarionov at gmail.com  Wed May  7 21:15:43 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 8 May 2008 01:15:43 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <fvtk7v$864$1@news.mtu.ru>

On Wed, 07 May 2008 21:13:27 -0400, Miles wrote:

> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>  <ivan.illarionov at gmail.com> wrote:
>  > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>  >
>  >  > Is there a way to do:
>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>  >  > x[0,2:6]
>  >  >
>  >  > That would return:
>  >  > [0, 3, 4, 5, 6]
>  >
>  >  IMHO this notation is confusing.
>  >
>  >  What's wrong with:
>  >  [0]+x[2:6]
> 
>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list
>  slicing:
> 
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10); return @x[0, 2..6]; // returns
>  (1, 3, 4, 5, 6)

So it should be x[0] + x[2:6] or x[0].extend(x[2:6])


From rossgk at gmail.com  Wed May 28 12:01:01 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 09:01:01 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
Message-ID: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>

I'm a newbie to python threads, and playing with some simple client
server stuff and lots of print statements.

My server thread launched with
     self.worker = WorkerThread(self)
completes an interaction and then if I check on it's status with
     print "Status:", self.worker        I get        Status none


A client thread behaves differently. Launched as
      self.clientWorker( = ClientThreadself)
when it finishes it's work, I instead get:
     Status: <ClientThread(Thread-2, stopped)>

If I check the isAlive status on each of those, self.worker.isAlive
throws an exception, 'cause there is nothing there anymore to check
isAlive on.  But self.clientWorker comes back as False, since it is a
stopped thread and hasn't gone away (which I'd like it to after it
finishes its work).

So my question is when a thread finishes its work how do I more
predictably control whether it is just stopped, or goes away all
together?   I don't want to do a double nested 'if' statement to check
if it exists before I check if it's alive.



From skanemupp at yahoo.se  Fri May  9 22:58:13 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 19:58:13 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com> 
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com> 
	<4824fcec$1@news.mel.dft.com.au>
Message-ID: <eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>

> The inner pair of () are not necessary.

yes they are?


ty anyway, got it now.


From __peter__ at web.de  Sun May  4 03:09:41 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 May 2008 09:09:41 +0200
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <fvjnfl$uqf$03$1@news.t-online.com>

dave wrote:

> I made a function that takes a word list (one word per line, text file) 
> and searches for all the words in the list that are 'shifts' of 
> eachother. ?'abc' shifted 1 is 'bcd'
> 
> Please take a look and tell me if this is a viable solution.
> 
> ?def shift(word, amt):
> ????????ans = ''
> ????????for letter in word:
> ????????????????ans = ans + chr((ord(letter) - ord('a') + amt) % 26 +
ord('a'))
> ????????return ans
> 
> def fileshift(x):
> ????????fin = open(x)
> ????????d = {}
> ????????for line in fin:
> ????????????????d[line.strip()] = [1]
> ????????????????for i in range(1, 26):
> ????????????????????????ite = shift(line.strip(), i)
> ????????????????????????if ite in d:
> ????????????????????????????????print ite
> 
> 
> Any tips/suggestions/critiques greatly appreciated.. I'm trying to 
> teach myself Python (and still beginning) and would love any helpful 
> info.

My ideas: 

Move the open() call out of fileshift() and have it working with arbitrary
iterables. 
Store a normalized version of the word in the dictionary. if every word in
the dict is guaranteed to start with an "a" you can reduce the number of
tests to one.
If you have many words you can build a fast shift() function based on
str.translate().

Invoke the following script both with and without a filename argument:

from string import ascii_lowercase as chars, maketrans

tables = [maketrans(chars, chars[i:] + chars[:i]) for i in range(26)]

def shift(word, n):
    return word.translate(tables[n%26])

def normalize(word):
    a = word[0]
    return shift(word, ord("a") - ord(a))

def findshifted(words):
    d = {}
    for word in words:
        d.setdefault(normalize(word), []).append(word)
    return d


if __name__ == "__main__":
    import sys
    args = sys.argv[1:]
    if args:
        words = (line.strip() for line in open(args[0]))
    else:
        import random
        sample = """\
        alpha
        beta
        gamma
        delta
        """.split()

        words = sample + [shift(random.choice(sample), random.randrange(26))
for _ in range(10)]

    items = findshifted(words).items()
    items.sort()
    for k, v in items:
        print k, "-->", v

Peter


From b0bm00r3 at gmail.com  Sun May 11 02:22:43 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:22:43 -0700 (PDT)
Subject: Keeping two lists aligned after processing
Message-ID: <3695ddb4-373f-4702-bdb8-4d067778fa7a@e53g2000hsa.googlegroups.com>

"""
I have a population of five algorithms. Each Alg has a method,
Alg.accuracy(), which calculates its accuracy. Running the accuracy
method on each Alg, I end up with a list of accuracies like [0.75,
0.10, 0.45, 0.80, 0.45]

Now I want to store the algorithms and associated accuracies in a
file, in descending order of accuracy.

Here's how I do it now. There must be a better way! This method is
inelegant, and does not handle at all the issue of what to do with
duplicate accuracies, such as the two different algorithms with 0.45
accuracies in the example above. It merely saves the first of the
duplicates -- not what I want at all.

I want to end up with a file:

0 AlgD 0.80
1 AlgA 0.75
2 AlgC 0.45
3 AlgE 0.45
4 AlgB 0.10

"""

algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
accs=[]
for alg in algs:
   thisacc=getattr(alg.accuracy)()   #comp.lang.python April
   accs.append(thisacc)

unsortedaccs=[x for x in accs] # to preserve unsorted
accs.sort()
accs.reverse()   # ending up with sorted list

nuorder=[]
for ax,acc in enumerate(accs):
   spot=unsortedaccs.index(acc)
   nuorder.append(spot)

ofn=open('store.alg','w')
for ord in nuorder:
   alg=algs[ord]
   acc=unsortedlist[ord]
   ofn.write("%d %s,%s" % (ord,alg,str(acc))
ofn.close()


From mensanator at aol.com  Mon May 12 14:47:42 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 12 May 2008 11:47:42 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <mailman.983.1210605470.12834.python-list@python.org>
Message-ID: <17db55cb-20ca-4802-9067-f203a580bc21@27g2000hsf.googlegroups.com>

On May 11, 7:05?pm, "Delaney, Timothy (Tim)" <tdela... at avaya.com>
wrote:
> Mensanator wrote:
> > Ok, I agree with 101, but I wouldn't necessarily
> > say the others were unfortunate. You might be
> > surprised at how often such fixations discover
> > bugs, something that I have a gift for.
>
> The discovering, the making, or both? ;)

Both, of course. The trick is to catch your errors before
anyone gets to see them. Then you get a reputation for being
clever.

>
> Tim Delaney



From miller.paul.w at gmail.com  Mon May 26 14:57:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 11:57:39 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>

On May 26, 2:34?pm, notnorweg... at yahoo.se wrote:

I wanted to address some other points I failed to mention in my first
response.

> so are they fundamentally differently built or is it just a lot of
> lowlevel operations built on top of each other?

Partly.  A high-level language is essentially one that gives you high-
level operations, like "apply the function f to each element of the
sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].

But, it's more than that.  (You use Haskell as your example, but I'll
use Python because I know it roughly a million percent better than
Haskell... hehe.)  In Python, you have support from the language to
treat functions as first-class objects; in C, you explicitly cannot do
this -- to map an arbitrary function over a sequence, you're
restricted to accessing the function through a pointer.  On the
surface, it's the same operation, but that extra level of indirection
can really bog one's mind down.  Think about how difficult it is for a
human to interpret the declaration of a function pointer in C, for
instance.

> haskell is considered a very highlevellanguage but can you do
> systemsprogramming with it(yes maybe it is very unpractical i dont
> know but can you)?


> is lambda calculus a more abstract and efficient way of modeling a
> computer?

Lambda calculus doesn't model computers.  It models *computation*.
That is, given a Turing machine, there's a set of functions in the
lambda calculus, which, when suitably combined, will yield the exact
same result as the original Turing machine.  That doesn't in any way
imply that Turing machines work by interpreting lambda calculus.

> how did lispmachines work? was the basic system programmed in LISP?

Yes, the whole kit and kaboodle, all the way down to the microcode was
programmed in LISP.  In principle, there's no reason we couldn't have
Haskell machines or Python machines.  It's just that nobody's been
crazy enough to do it, that I know of. :-)


From dReEeMpOeVsEtT1H at IgSmail.com  Thu May 29 19:30:05 2008
From: dReEeMpOeVsEtT1H at IgSmail.com (deepest1)
Date: Fri, 30 May 2008 01:30:05 +0200
Subject: boost
References: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>
	<1uv2h5-dii.ln1@satorlaser.homedns.org>
Message-ID: <MPG.22a95ae9ddf5f5a798968d@news.t-com.hr>

Thanks for help.

I lost more then 10 hours on boost today, but it finally works, and I'm 
pleased with it.

:)


From george.sakkis at gmail.com  Wed May 21 18:32:53 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 21 May 2008 15:32:53 -0700 (PDT)
Subject: Segmentation fault on updating a BYTEA field [psycopg2]
Message-ID: <f3b33874-7f0c-4fb7-a5d3-d3c75927000c@f63g2000hsf.googlegroups.com>

I have a simple DB table that stores md5 signature pairs:

   Table "public.duplicate"
  Column  | Type  | Modifiers
----------+-------+-----------
 sig      | bytea | not null
 orig_sig | bytea | not null
Indexes:
    "duplicate_pkey" PRIMARY KEY, btree (sig)
    "ix_duplicate_orig_sig" btree (orig_sig)

I use SqlAlchemy to interact with it and inserting works fine; update
however crashes hard with a segfault. Sure enough, the crash is
reproducible when using the underlying psycopg2 directly:

>>> import psycopg2
>>> connect_string = ...
>>> conn = psycopg2.connect(connect_string)
>>> cur = conn.cursor()
>>> cur.execute('SELECT sig,orig_sig from duplicate limit 1')
>>> d = cur.fetchone()
>>> d
(<read-only buffer for 0x40209100, size 16, offset 0 at 0x403054e0>,
<read-only buffer for 0x402090f0, size 16, offset 0 at 0x40305580>)
>>> map(str,d)
["\x02#qO\xb0\xcc\xfcx\xb9u\xa5\x83)\xc4'@", '\xa1\xf22\xf6y\xd0\xbc
\xea6\xf0Y\xf1"\xc9(\n']
>>> cur.execute('UPDATE duplicate SET orig_sig=%(orig_sig)s WHERE duplicate.sig = %(duplicate_sig)s',
...             dict(orig_sig=d[0], duplicate_sig=d[1]))
Segmentation fault

Am I (and SqlAlchemy) doing something silly or is this a bug in
psycopg2 ?

George


From jorgen.maillist at gmail.com  Wed May 21 04:45:21 2008
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Wed, 21 May 2008 10:45:21 +0200
Subject: Print HTML from Python
Message-ID: <11e49df10805210145g56b4266fjf94eb2c480fd9625@mail.gmail.com>

Hi All,

I am at a loss. This is slightly OT because it concerns Windows and
HTML printing. I would like to print a HTML document from Python, but
not showing the printing dialog. After numerous searches and trials I
came to the conclusion that ShellExecute with the "print" command and
a HTML document simply always shows a print dialog, so that road is a
dead end (or unless someone can show me a snippet that does work).

I used win32com and I am able to print through he internet explorer
interface which seems to work, but quite unreliably. When I execute
the scipt too fast, nothing is printed at all. The method isBusy that
IE exposes through COM always returns False so there is no way to wait
reliably on the progress of the printer.

So basically my question is, does someone know a python lib or way to
print HTML to the default printer (I can get the printer name so even
that is not really needed) without showing the print dialog?

With regards,
- Jorgen


From conradwt at gmail.com  Tue May 13 20:29:59 2008
From: conradwt at gmail.com (Con)
Date: Tue, 13 May 2008 17:29:59 -0700 (PDT)
Subject: Install Python MySQL db module?
Message-ID: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>

Hi, how does properly install the Python MySQL db module for Mac OS
X?  I was only able to locate the Win32 modules.

Thanks in advance,

-Conrad




From castironpi at gmail.com  Wed May 14 14:04:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:04:43 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>
Message-ID: <a372359c-e323-4437-8e9a-0e4c52f81ded@d1g2000hsg.googlegroups.com>

On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
> >?Should tuples be named?
>
> Yes.

Not clearly should.  Sequences ought be.  If you're on the right time
for both, can't the library hold the B?


From mathieu.prevot at gmail.com  Sat May 24 08:09:07 2008
From: mathieu.prevot at gmail.com (Mathieu Prevot)
Date: Sat, 24 May 2008 14:09:07 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
Message-ID: <3e473cc60805240509t207853dcm5240c110f723fad1@mail.gmail.com>

Hi

I import subprocess and use Popen, but PIPE is not defined. I used
2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
always the same. What am I missing ?

Thanks
Mathieu


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:22:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:22:59 -0300
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
Message-ID: <op.ua4o8lhbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 15:18:31 -0300, globalrev <skanemupp at yahoo.se>  
escribi?:
> On 13 Maj, 18:59, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
>> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>>
>> > if i do something like
>> > while 1:
>> >     print "x"
>>
>> > will the program ever stop because it runs out of memory?
>>
>> No, there is no reason to run out of memory. This will simply
>> make an everlasting x-printer and there is no need to store
>> anything [...]
>
> and when the program get skiled because out of memory all this will be
> deleted from the memory?

Yes. That's the operating system job.

> so there is no way that you can, by accident, fill your whole
> harddrive and make it unusable?
>
> and RAM-memory always get cleaned out when not used i guess?

We were talking of RAM, including virtual memory backed by disk space.
You *may* fill your whole disk if you keep writing data. If you invoke  
your example above using:
python neverending.py > output
the "output" file will grow indefinitely until you kill the program or you  
get a "disk full" exception.
That disk space is not cleared when the program exits - you have to  
explicitely delete the file.
Note that none of this is Python specific.

-- 
Gabriel Genellina



From rhamph at gmail.com  Sun May 18 12:15:56 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sun, 18 May 2008 09:15:56 -0700 (PDT)
Subject: waiting on an event blocks all signals
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
	<69auuoF2uob0sU1@mid.uni-berlin.de>
Message-ID: <68e1821b-37e1-4c96-a812-2105ab305561@j33g2000pri.googlegroups.com>

On May 18, 9:05 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> alan schrieb:
>
> > This ignores CTRL-C on every platform I've tested:
>
> > python -c "import threading; threading.Event().wait()"
> > ^C^C^C^C
>
> > It looks to me like all signals are masked before entering wait(). Can
> > someone familiar with the internals explain and/or justify this
> > behavior? Thanks,
>
> They aren't masked. Read the docs:
>
> # Although Python signal handlers are called asynchronously as far as
> the Python user is concerned, they can only occur between the ``atomic''
> instructions of the Python interpreter. This means that signals arriving
> during long calculations implemented purely in C (such as regular
> expression matches on large bodies of text) may be delayed for an
> arbitrary amount of time.
>
> (http://docs.python.org/lib/module-signal.html)
>
> Which is what is happening here - wait is implemented in C. So the
> arriving signal is stored flagged in the interpreter so that the next
> bytecode would be the signal-handler set - but the interpreter still
> waits for the blocked call.

If a signal arrives while the thread is in a syscall it will usually
interrupt the syscall.  Most code in the interpreter will see the
EINTR error code and check if we have a signal to process, which leads
to raising a KeyboardInterrupt exception.  However, most thread
synchronization functions specified in POSIX are not interrupted by
signals, so the interpreter never has a chance do anything.  Why would
we care anyway, as Python doesn't let you intentionally interrupt a
non-main thread?


From miller.paul.w at gmail.com  Mon May 26 15:18:47 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:18:47 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org>
Message-ID: <014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>

On May 26, 10:36?am, Laura Creighton <l... at openend.se> wrote:
> I'm looking for an application that handles the membership of an
> organisation -- who's a member, who has paid fees, addressbook and
> the odd added field.
>
> Anybody got one they recommend?
>

It sounds like you essentially need a specialized database and an app
to query the database.  If this is a small organization (under 100
people, say), then the simplest solution would probably be a simple
spreadsheet.  Otherwise, maybe something like Organizers' Database
(http://www.organizersdb.org/) would do the trick.

I haven't actually used this software, but it looks like it's made to
do exactly what you want to do.

Hope that helps!



From roy at panix.com  Sat May 24 18:04:31 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 18:04:31 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <roy-256A5B.18043124052008@70-1-84-166.area1.spcsdns.net>

David <wizzardx at gmail.com> wrote:
> Problem 1: You can only code against tests

Yup.  That's the flavor of Kool-Aide being served at a convenient TDD 
outlet near you.

> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing the
> code you will also think of a lot of corner cases you should also
> handle. The natural way to do this is to add them to the code first.

That's only the natural way if you're haven't drunk the Kool-Aide :-)  It 
takes a while to get used to, but once you get the hang of it, doing it 
this way becomes very natural.  Sure, I think of corner cases when I'm 
writing code.  But, what I do with them is write a test for them first, 
then write the code which implements it.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 04:29:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 10:29:45 +0200
Subject: Compress a string
In-Reply-To: <mailman.1315.1211133997.12834.python-list@python.org>
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <48328bf3$0$23651$426a34cc@news.free.fr>

Matt Porter a ?crit :
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
> 
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
> 
> 
> def compress_str(str):

using 'str' as an indentifier will shadow the builtin str type.

>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
> 
> 

Now everyone gave smart solutions, may I suggest the stupidier possible one:

def compress_string(astring):
    compressed = []
    for c in astring:
        if c not in compressed:
            compressed.append(c)
    return ''.join(compressed)

Not elegant, but at least very clear.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon May 19 15:58:07 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 19 May 2008 21:58:07 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<vi1Yj.144433$Er2.142300@bignews6.bellsouth.net>
Message-ID: <69e4efF31tjn1U2@mid.individual.net>

inhahe wrote:

> i see lots of neat one-liner solutions but just for the sake of
> argument:
> 
> def compress_str(str):
>      new_str = ""
>      lc = ""
>      for c in str:
>         if c != lc: new_str.append(c)
>      return new_str

Please test before posting.

>>> compress_str("AAAABBBBCCCCC")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 5, in compress_str
AttributeError: 'str' object has no attribute 'append'

Regards,


Bj?rn

-- 
BOFH excuse #48:

bad ether in the cables



From marlin_rowley at hotmail.com  Fri May 16 19:23:03 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:23:03 -0500
Subject: More on numpy trickiness.
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W206F39A4D8594A110FBB5A9FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From giraffeboy at gmail.com  Wed May 21 06:30:04 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 03:30:04 -0700 (PDT)
Subject: Database Query Contains Old Data
Message-ID: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>

Hi there,

I'm having a problem with the Python db api, using MySQL.

I've written a program with a GUI using wxPython, the GUI is contained
in main.py which imports another module - reports.py. There are
several reports that are selected using the gui, and each report is a
class in the file reports.py. These classes contain a method which is
passed data as arguments and produces a report, writing HTML to a file
and using matplotlib to create a graph file.

The report class methods are called from the GUI using the following
code:
        agentlist = self.getselected()
        detail = self.cb1.GetValue()
        if self.getdates() != False:
            fromdate, todate = self.getdates()
            app.mainframe.SetStatusText("Generating Report...")
            if self.reportchoice.GetSelection() == 0:
                thereport = reports.VehicleRunningCost()
                thereport.producereport(agentlist, fromdate=fromdate,
todate=todate, detail=detail)
            app.mainframe.SetStatusText("Report Complete")
            viewerframe = ViewerFrame(None, -1, "Mileage and Fuel
Report Viewer")
            viewerframe.Show(True)

The first time you run a report, everything works as expected but if
you run it a second time, after modifying data, it seems that the data
from before the modification is selected on the second report run.

It would be much appreciated if anyone could give me any hints as to
why the old data is selected. I haven't posted the full code because
it's quite long but will post more if anyone wants to see specific
parts.

Thanks!
Andrew


From vinay_sajip at yahoo.co.uk  Thu May 29 05:16:19 2008
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Thu, 29 May 2008 02:16:19 -0700 (PDT)
Subject: Custom log handler and logging.config.fileConfig()
References: <mailman.1700.1212008047.12834.python-list@python.org>
Message-ID: <72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>

On May 28, 9:53 pm, "Lowell Alleman" <low... at allemansonline.com>
wrote:
> Here is the situation:  I wrote my own log handler class (derived fromlogging.Handler) and I want to be able to use it from aloggingconfig
> file, that is, a config file loaded with thelogging.config.fileConfig() function.
>
> Let say myloggingclass is called "MyLogHandler" and it's in a module
> called "mylogmodule", I want to be able to make an entry something
> like this in myloggingconfig file:
>
>    [handler_hand02]
>    class=mylogmodule.MyLogHandler
>    level=DEBUG
>    formatter=form02
>    args=('python.log', 10, True)
>
> I did some digging in the code and documentation, and it doesn't
> appear that this question of writing and accessing your own log
> handlers is addressed.  As per thelogging/config.py code, it looks
> like the actual file handler classes are being grabbed using an "eval"
> from the "logging" module's namespace, like so:
>    klass = eval(klass, vars(logging))
>
> So this basically means that I have to mess with the "logging"
> module's namespace if I want this to work, right?  So I've come up
> with a couple of options, but I'm trying to figure out what approach
> is best:
>
> Option 1:  Require the client (the user of myloggingmodule), first
> import my module and then copy it into theloggingmodule's namespace,
> before calling  fileConfig().  Something like this:
>
>     import mylogmodule
>     importlogging
>    logging.mylogmodule = mylogmodule
>
> Option 2:  Have my module make a copy MyLogHandler class into thelogging(orlogging.handlers) module, and then let the client use it
> from their directly.  They client would still have to load mylogging
> class first (which isn't any different they what they would have to do
> if they wanted to use the extended log handlers form thelogging.handlers module)
>
> My module would include:
>     importlogging
>     class MyLogHandler(logging.Handler):
>         ...
>    logging.MyLogHandler = MyLogHandler
>
> The config file would simply have:
>     class=MyLogHandler
>
> Option 3:   Is there an easy (and non-evil) way for me to make my
> module available as "logging.mylogmodule" directly?  I am using
> setuptools, and it seems like what I've read about "namespaces", they
> do something close to what I'm looking for, but I think that requires
> that all of the "__init__.py"s involved be empty (or have some special
> namespace declaration code).  The __init__.py for theloggingmodule
> is not at all empty, so I suppose that rules out this option?  Anyone
> have some insights on this?
>
> Thanks in advance,
>
> - Lowell Alleman

Hi Lowell,

I think it's OK to use the logging.handlers namespace to add your
custom handlers - after all, the handlers namespace is for holding
handlers other than the basic ones included in "logging". So...

# -- myhandler.py ---
import logging.handlers

class MySpecialHandler(logging.handlers.RotatingFileHandler):
    def __init__(self, fn):
        logging.handlers.RotatingFileHandler.__init__(self, fn,
maxBytes=2000, backupCount=3)


# -- logging.ini ---
[loggers]
keys=root

[handlers]
keys=hand01

[formatters]
keys=form01

[logger_root]
level=NOTSET
handlers=hand01

[handler_hand01]
class=handlers.MySpecialHandler
level=NOTSET
formatter=form01
args=("rotating.log",)

[formatter_form01]
format=%(asctime)s %(levelname)s %(message)s
datefmt=
class=Formatter

# -- app.py ---
import logging.handlers, logging.config
from myhandler import MySpecialHandler

logging.handlers.MySpecialHandler = MySpecialHandler

logging.config.fileConfig("logging.ini")

logger = logging.getLogger("test")

for i in xrange(100):
    logger.debug("Message no. %d", i)


should produce the expected results.


From squareswallower at invalid.com  Sun May  4 01:17:07 2008
From: squareswallower at invalid.com (dave)
Date: Sat, 3 May 2008 23:17:07 -0600
Subject: word shifts
Message-ID: <fvjgsj$4j2$1@news.xmission.com>

Hello,

I made a function that takes a word list (one word per line, text file) 
and searches for all the words in the list that are 'shifts' of 
eachother.  'abc' shifted 1 is 'bcd'

Please take a look and tell me if this is a viable solution.

 def shift(word, amt):
	ans = ''
	for letter in word:
		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
	return ans

def fileshift(x):
	fin = open(x)
	d = {}
	for line in fin:
		d[line.strip()] = [1]
		for i in range(1, 26):
			ite = shift(line.strip(), i)
			if ite in d:
				print ite


Any tips/suggestions/critiques greatly appreciated.. I'm trying to 
teach myself Python (and still beginning) and would love any helpful 
info.

thanks!



From wmcbrine at users.sf.net  Sat May 24 20:36:28 2008
From: wmcbrine at users.sf.net (William McBrine)
Date: Sun, 25 May 2008 00:36:28 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <gw2_j.171$4c.64@trnddc08>

On Sat, 24 May 2008 13:12:13 +0200, Johannes Bauer wrote:

> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> 	printf("%s\n", buf);
> 	tmp = fgets(buf, sizeof(buf), f);
> }

I think a more Pythonic way to write this, in general, would be:

while (1) {
    char *tmp = fgets(buf, sizeof(buf), f);
    if (!tmp)
        break;
    printf("%s\n", buf);
}

In actual Python, that's:

while True:
    buf = f.readline()
    if not buf:
        break
    print buf

Yeah, it's longer than the traditional C way, but you don't need to have 
duplicate fgets() (or whatever) lines. On the plus side, you're less 
likely to get '=' and '==' accidentally swapped in Python.

For this specific example, it can be cut down much more:

for buf in f.readlines():
    print buf

(BTW, all of the above result in doublespacing the original file, but 
that's what your C version was doing, so I kept it that way.)

-- 
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- pass it on


From tjreedy at udel.edu  Fri May  9 16:02:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 16:02:58 -0400
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <g02ale$lnj$1@ger.gmane.org>


"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.uav4dutjx6zn5v at a98gizw.cpe.telecentro.net.ar...
En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta 
<banibrata.dutta at gmail.com> escribi?:

|> I already have Python25, and need to install Python24. I would prefer 
not to
|> remove Python25, but each Python version seems to update the registry, I
|> guess (not sure), overwriting each other's entries. Any way to have both
|> versions ?

|They can coexist peacefully. The last one you install will be the default 
|version to handle .py files automatically.

Since 2.5 at least, the Windows installer gives the option to make the new 
installation the default or not.  One might have to choose 'custom' versus 
'auto' (don't remember for Python), but I do the latter always anyway.

tjr







From justin.mailinglists at gmail.com  Tue May  6 21:45:28 2008
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: Tue, 6 May 2008 18:45:28 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>

On May 6, 5:19 pm, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>
> It doesn't work.
> Because subprocess.Popen execute "find" like this.
>
> C:\>find \"445\"
> ???? - \
>
> C:\>
>
> It adds a '\' before each '"'.
> How to remove the '\'?
> Thank you.

cannot help with the backslashes but try findstr instead of find


From zerty.david at gmail.com  Thu May  8 20:28:25 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 21:28:25 -0300
Subject: Cannot import opj
Message-ID: <5dc598e30805081728i7d451bber36991f5a547874a7@mail.gmail.com>

I'm trying to import the opj module
Trying like this:
from Main import opj
It says it doesn't exists
And like this:
import os.path.join as opj

Raises error.
What should I do?
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From skanemupp at yahoo.se  Thu May  1 12:07:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 1 May 2008 09:07:58 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <2d4d6a94-cac4-4359-962d-dff23ab42466@y38g2000hsy.googlegroups.com>

another program that has the same problem:
import sys, pygame
pygame.init()

size = width, height = 320, 240
speed = [2, 2]
black = 0, 0, 0

screen = pygame.display.set_mode(size)

ball = pygame.image.load("snake.png")
ballrect = ball.get_rect()

while 1:
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit()

    ballrect = ballrect.move(speed)
    if ballrect.left < 0 or ballrect.right > width:
        speed[0] = -speed[0]
    if ballrect.top < 0 or ballrect.bottom > height:
        speed[1] = -speed[1]

    screen.fill(black)
    screen.blit(ball, ballrect)
    pygame.display.flip()


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:25:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:25:33 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <mailman.1337.1211191001.12834.python-list@python.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
Message-ID: <483406a0$0$10773$426a74cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch
> <deets at nospam.web.de> escribi?:
>> Agustin Villena schrieb:
> 
>>> is there anyway to show the class of a method in an exception's 
>>> traceback?
>>> 
>>> I want to improve the line File "G:\dev\exceptions\sample.py",
>>> line 3, in foo
>>> 
>>> to File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>> 
>>> Is this improvement feasible
>> It should be. You can get a dictionary of the locals of an
>> exception stack frame, of which you could extract the
>> self-parameter's class.
> 
> That by itself is not enough, the method could be inherited; one
> should walk the base classes in the MRO to find the right one. And
> deal with classmethods and staticmethods. And decorators that don't
> preserve meta information... 

And monkeypatches.

> Hmmm, I think it isn't so trivial as it
> seems.

And not that useful - why would one care about the function being 
defined in class X or Y when one have the exact file and line ?



From dstanek at dstanek.com  Tue May 20 16:16:31 2008
From: dstanek at dstanek.com (David Stanek)
Date: Tue, 20 May 2008 16:16:31 -0400
Subject: scaling problems
In-Reply-To: <u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<mailman.1371.1211245489.12834.python-list@python.org>
	<u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>
Message-ID: <de32cc030805201316p65c36a58g2b266ef1bb153177@mail.gmail.com>

On Tue, May 20, 2008 at 12:03 AM, James A. Donald <jamesd at echeque.com> wrote:
> On Mon, 19 May 2008 21:04:28 -0400, "David Stanek"
> <dstanek at dstanek.com> wrote:
>> What is the difference if you have a process with 10 threads or 10
>> separate processes running in parallel? Apache is a good example of a
>> server that may be configured to use multiple processes to handle
>> requests. And from what I hear is scales just fine.
>>
>> I think you are looking at the problem wrong. The fundamentals are the
>> same between threads and processes.
>
> I am not planning to write a web server framework, but to use one.
> Doubtless a python framework could be written to have satisfactory
> scaling properties, but what are the scaling properties of the ones
> that have been written?
>

Both Django and TurborGears work well for me. When you step back and
think about it all of the popular web frameworks would do just fine.
The ones that don't do multiprocessing out of the box would be trivial
to load balance behind Apache or a real load balancer. Again the
problem here is the number of connections to the database, once you
get big enough to worry about it.

-- 
David
http://www.traceback.org


From bignose+hates-spam at benfinney.id.au  Thu May  8 18:35:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 May 2008 08:35:23 +1000
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
	<88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
Message-ID: <87y76ka0gk.fsf@benfinney.id.au>

offby1 <eric.hanchrow at gmail.com> writes:

> Ah.  So from the point of view of mut.py, "thing" and "system.thing"
> are separate, unrelated variables;

No. Thinking of them as "variables" (with all the non-Python
terminological baggage that implies) will only exacerbate the
confusion.

"thing" and "system.thing" are separate *names*, that can be
independently bound to different objects or the same object.

> the former of which is initialized from the latter when mut says
> "from system import thing".

Rather, the name "thing" is bound to the same object as the name
"system.thing" at the time "from system import thing" is executed.
What happens to the name "system.thing" afterward has no effect on the
name "thing".

-- 
 \     "Listen: we are here on Earth to fart around. Don't let anybody |
  `\               tell you otherwise."  -- _Timequake_, Kurt Vonnegut |
_o__)                                                                  |
Ben Finney


From martin at v.loewis.de  Mon May 12 13:37:48 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 19:37:48 +0200
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <4828806c$0$11583$9b622d9e@news.freenet.de>

> Hopefully this question even makes sense! 

I completely agree that you don't need to spend time on
learning a language if you don't plan on using it; I'll
leave alone the entire discussion of doing things for fun
only (you don't *need* to eat ice cream, either - right?)

OTOH: do you plan to do any programming at all, in your
life? If yes: consider using Python for every programming
task you'll encounter - unless there are outside constraints
demanding a different language. Python is flexible enough
for *all* you programming needs (I claim); then the acquired
knowledge will be useful.

To be effective in a language, you need to be fluent in it.
This involves both passive reading, as well as active
experimentation.

HTH,
Martin


From vdv100 at gmail.com  Sun May  4 11:28:54 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 16:28:54 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
Message-ID: <eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>

I can grab the image,  I need a way of grab the region size with the mouse,
a easy way of the user select a region of the image to analyze, something
like the  "Rectangle selection tool" of gimp.

Regards,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org

2008/5/4 David <wizzardx at gmail.com>:

> On Sun, May 4, 2008 at 4:25 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> > Hi,
> >
> > anyone know a Python library to grab the size of a selected image region
> > (the selection will be made with the mouse), that work in Linux ?
>
> You might be able to use this tool:
>
> http://freshmeat.net/projects/gtkshots/
>
> David.
>
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From zer0dyer at verizon.net  Mon May 26 20:05:44 2008
From: zer0dyer at verizon.net (Curtis)
Date: Tue, 27 May 2008 00:05:44 GMT
Subject: php vs python
In-Reply-To: <DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>	<g1d3lf$1rpd$3@news.mtu.ru>
	<bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>
	<DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>
Message-ID: <sfI_j.3434$tF1.773@trnddc01>

I V wrote:
> On Sun, 25 May 2008 21:41:09 -0400, Jerry Stuckle wrote:
>> The the good programmers are able to adapt to the language and make the
>> most of whatever language they're using.  The result is good code. OTOH,
>> poor programmers I have known have found all kinds of excuses - from the
>> language itself to lack of requirements, to anything else they can
>> blame, except the real root of the problem.
> 
> That's true - but I wonder if there might not be differences at the 
> margins. Some languages (and, which is not quite the same but not easy to 
> fully distinguish either, the communities around some languages) may 
> encourage mediocre programmers to produce slightly more or less mediocre 
> programs.
> 
> Some features of Python (the one that really stands out for me is not 
> default-initializing variables on first use; the comparatively clean 
> standard library might be another), and some features of the Python 
> community (which, IME, has more members more explicitly committed to 
> writing clean code) I think do make Python a better environment for us 
> mediocre programmers.

If you set PHP to show notices, it will tell you of such cases. 
However, the way I learned good programming practice was talking with 
other programmers, and trying different languages. I think if you have 
a real desire to write good code, and work at it, you can accomplish 
your task, regardless of the language.

However, there is definitely a prevalent amount of poorly written PHP 
on the Web, so it can be easy for a newcomer to pick up some bad 
practices. This isn't a fault of the design of the language, though.

> But maybe I'm wrong - I've never been paid to write Python programs, 
> whereas I have been paid to write PHP, so I might just be projecting my 
> frustrations with work onto the language. I've also not used PHP5 much in 
> anger, which does look to be a lot nicer than earlier versions.

Yeah, PHP5 is awesome, and PHP4 is dead/dying.

--
Curtis


From fc14301589 at icqmail.com  Wed May 28 06:38:47 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Wed, 28 May 2008 18:38:47 +0800
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
	<mailman.1640.1211888930.12834.python-list@python.org>
Message-ID: <483d3639_1@news.tm.net.my>

On 19:48, marted? 27 maggio 2008 Alex Gusarov wrote:

> I tried Eric (on windows), but then decided in favour of Eclipse +
> PyDev.

I'm a KDE fan :) and I like Qt design. I've Qt designer installed, but I much
like if I can use an IDE which write python code, rather than wrappers.

I've just been disappointed by Boa Constructor, it disappeared suddenly while
trying some test.
Which other SDK write in python code?




From kamhung.soh at gmail.com  Wed May 28 20:02:29 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 29 May 2008 10:02:29 +1000
Subject: convert string number to real number - ValueError: invalid  
	literal for int() with base 10: '"2"'
In-Reply-To: <pan.2008.05.28.18.07.20@rwth-aachen.de>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>	<20080228181914.6307257e.darcy@druid.net>	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>	<mailman.1676.1211955740.12834.python-list@python.org>	<a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>
	<pan.2008.05.28.18.07.20@rwth-aachen.de>
Message-ID: <g1krqn$ois$1@ger.gmane.org>

Matthias Bl?sing wrote:
> Am Wed, 28 May 2008 10:41:51 -0700 schrieb davidj411:
> 
>> I like the str2num function approach, but then i get left with a float
>> that has more than 2 decimal spaces , i.e. 11.50 becomes
>> 11.449999999999999 and round will not fix that.
> 
> Welcome to the wonderful world of floating point numbers. For your usage 
> you want 10-based numbers. Have a look at the decimal module:
> 
>>>> from  decimal import Decimal
>>>> a = Decimal("11.45")
>>>> a
> Decimal("11.45")
>>>> str(a)
> '11.45'
>>>> a + 1
> Decimal("12.45")
>>>> a + Decimal("1.55")
> Decimal("13.00")
> 
> HTH
> 
> Matthias
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Thanks for the tip, Matthias.  I knew that there had to be a way to 
handle arbitrary precision numbers.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From oldmantaggie at gmail.com  Wed May 14 14:19:05 2008
From: oldmantaggie at gmail.com (John Chandler)
Date: Wed, 14 May 2008 13:19:05 -0500
Subject: Submitting data to HTTPS javascript
Message-ID: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>

I am trying to write a script to test certain functionality of a website
that requires users to login. The login page is simple, a few pictures and
two text bars (one for username and one for password). I tried logging in
with webbrowser, but that did not work because the page uses javascript. I
also tried using win32com though I have no idea what I am doing. Any ideas?
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From deets at nospam.web.de  Tue May 13 11:50:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 17:50:04 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <68trmmF2vjivnU1@mid.uni-berlin.de>

> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables).  So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.

5-10 times faster for what kind of code? I don't see anything that resembles
OO features of python, let alone more advanced concepts like
meta-programming, higher-order functions and such. Which save tremendous
amounts of time coding. If FT grows these and *still* is 5-10 times faster,
I'll salut you.

And what is really expensive is brain-cycles, not cpu-cycles. Which above
described features save.
 
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
> 
> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed.  The difference: I
> can't afford to ignore users.

Oh *please*! Try getting nearly as feature & library complete as python is
today - and *then* I'll point to all the akwardness of FT. Let alone it is
very much a question of view-point if two different looping constructs or
keywords are more awkward than one general looping-concept with only one
keyword. It's a matter of taste.

Diez


From greg at cosc.canterbury.ac.nz  Fri May  9 04:56:18 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 09 May 2008 20:56:18 +1200
Subject: ANN: Pyrex 0.9.7
Message-ID: <mailman.858.1210338504.12834.python-announce-list@python.org>

Pyrex 0.9.7 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Highlights of this version:

* I have streamlined the integer for-loop syntax. Instead
   of the loop variable redundantly appearing in two places,
   it's now just

     for x < i < y:
       ...

* If you declare a variable as a list or dict, then calls
   to some of its methods will be compiled into type-specific
   Python API calls instead of generic ones.

* Most built-in constants are referenced directly instead of
   via dict lookup.

* There are two new builtin functions, typecheck() and
   issubtype(), for checking the types of arguments more safely
   (since isinstance and issubclass can be fooled).

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From offby1 at blarg.net  Thu May  8 15:00:51 2008
From: offby1 at blarg.net (Eric Hanchrow)
Date: Thu, 08 May 2008 12:00:51 -0700
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
Message-ID: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>

(This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)

This seems so basic that I'm surprised that I didn't find anything
about it in the FAQ.  (Yes, I am fairly new to Python.)

Here are three tiny files:

==== mut.py ====

    import system
    from system import thing

    def doit():
        print "       thing is", thing

    def do_it_slightly_differently():
        print "system.thing is", system.thing

==== system.py ====
    thing = "I am the original thing!!"

==== test.py ====
    import mut
    mut.doit()
    mut.do_it_slightly_differently()
    import system

    system.thing = "The new improved thing"
    mut.doit()
    mut.do_it_slightly_differently()

When I run "python test.py", I see

           thing is I am the original thing!!
    system.thing is I am the original thing!!
           thing is I am the original thing!!
    system.thing is The new improved thing

What surprises me is that the assignment to "system.thing" in test.py
only seems to affect the use of "system.thing" in mut.py, and not
affect the use of just plain "thing" in that same file.  I would have
expected my assignment to have affected both, or perhaps neither.

I have no idea why these two differ.  Can someone explain?
-- 
Rarely do we find men who willingly engage in hard, solid
thinking.  There is an almost universal quest for easy answers
and half-baked solutions.  Nothing pains some people more
than having to think.
        -- Martin Luther King, Jr.
        from "Strength to Love," 1963.



From simon at brunningonline.net  Fri May 23 08:29:24 2008
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 23 May 2008 13:29:24 +0100
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <8c7f10c60805230529v490577dfg3727591192c71537@mail.gmail.com>

On Thu, May 22, 2008 at 4:55 PM, duli <dulipishi at gmail.com> wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.

With regard to the arcitecture of systems rather than process, there
are some good boos liked to from here:
<http://martinfowler.com/articles/enterprisePatterns.html>. Patterns
of Enterprise Application Architecture in particular is a bit of a
classic.

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues | Twitter: brunns


From larzluv at hotmail.com  Sun May 11 00:41:33 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sat, 10 May 2008 21:41:33 -0700 (PDT)
Subject: Module python-magic on/for Windows?
Message-ID: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>

I've heard tell of a Python binding for libmagic (file(1) *nixy
command; see http://darwinsys.com/file/).  Generally, has anybody
built this and worked with it under Windows?

The only thing I've been able to find is the python-magic module at
http://hupp.org/adam/hg/python-magic/.

    [1] Is this "THE" python-magic module.  (It seems to be to me, but
obviously I don't know. :)

    [2] Has anybody been able to build THIS version under Windows?

I've gotten as far as completing the "setup.py install" process.
(After many troubles; I'll post the top-to-bottom HowTo-like info if/
when I ever get it to work.  :)

At this point, there -is- a "magic" module that can be imported
(attempted-to, that is), but it fails.

If I go to a cmd window, run the Py interpreter, and do "import magic"
I get:

    [1] an error pop-up (Windows window, which is blocking [as opposed
to "non-blocking", not "obscuring", though it does that, too] the cmd
window):

        (X) This application has failed to start because magic1.dll
was not found.  Re-installing the application may fix this problem.
[OK]

    [2] then, within the interpreter, I get:

        Traceback (most recent call last):
          File "<stdin>", line 1, in <module>
          File "build\bdist.win32\egg\magic.py", line 2, in <module>
          File "build\bdist.win32\egg\cmagic.py", line 7, in <module>
          File "build\bdist.win32\egg\_cmagic.py", line 7, in <module>
          File "build\bdist.win32\egg\_cmagic.py", line 6, in
__bootstrap__
        ImportError: DLL load failed: The specified module could not
be found.

I'm using Python 2.5 on Windows XP Pro.  I've got CYGWIN installed
(more info can be provided if necessary) for a copy of file.exe (and
libmagic.a @ 357KB and libmagic.dll.a @ 25KB in C:\cygwin\lib).  I
also have GNUWin32, also for file.exe alternatively (and
libmagic.dll.a @ ~ 8KB in C:\Program Files\GnuWin32\lib).

magic.py in C:\Program Files\Python25\Lib\site-packages\magic-0.1-
py2.5-win32.egg imports cmagic.py (also in this egg), which imports
_cmagic.py, which has the following:

    def __bootstrap__():
       global __bootstrap__, __loader__, __file__
       import sys, pkg_resources, imp
       __file__ =
pkg_resources.resource_filename(__name__,'_cmagic.pyd')
       del __bootstrap__, __loader__
       imp.load_dynamic(__name__,__file__)
    __bootstrap__()

Now I *presume* my problem (at this point) is that I need to have
libmagic named as "magic1.dll" -wherever- this module is looking for
it.  I'm just not sure, let alone if this is true, WHERE Python/
modules expect to find such things.

Also, which version(s)/file(s) should be placed where, or...??


Thanks for any/all help/pointers.  I apologize up-front if I left out
any pertinent info; I'm paranoid about putting in too much (and some
that may be worthless) already...  :)



Cheers,
Larry Hale


From eliben at gmail.com  Sat May 17 14:35:32 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 11:35:32 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com><dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
	<b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com> 
	<mailman.1277.1211046869.12834.python-list@python.org>
Message-ID: <e9b63a8c-e9dd-464f-9c2b-90073bd0cfb7@2g2000hsn.googlegroups.com>

On May 17, 8:54 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "eliben" <eli... at gmail.com> wrote in message
>
> news:b439e7f0-685b-46b6-b0ea-3161cc548868 at m45g2000hsb.googlegroups.com...
> | Is there a simple way to find out which packages are used by my
> | script ?
>
> Ggrep for import statements?

This isn't very comprehensive :-)

>  (But that only only gives direct dependencies.)
> Does py2exe have an option to output the list it collects?|
> I think people have mentioned such here.

Digging around the standard library documentation, I came upon the
'modulefinder' module, which seems to be able to do what I want, at
least in terms of finding all the modules used. I wonder how difficult
it should be to wrap something around modulefinder that copies all the
relevant modules into a local directory and modifies sys.path
accordingly.

Eli




From sarenius at sun3.oulu.fi  Sun May 25 23:09:07 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Mon, 26 May 2008 03:09:07 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
	<slrng3jfji.hio.sarenius@sun3.oulu.fi>
	<p8GdndnA1KrXRKTVnZ2dnUVZ_oninZ2d@earthlink.com>
Message-ID: <slrng3kaej.n33.sarenius@sun3.oulu.fi>

In article <p8GdndnA1KrXRKTVnZ2dnUVZ_oninZ2d at earthlink.com>, Dennis Lee Bieber wrote:
>(Vesa-Matti Sarenius) declaimed the following in comp.lang.python:
>	And what reported the file not found -- some line of the Python
>script, or a spawned shell (since the line you point out is just
>creating a command to be executed a subprocess of some sort)

I think that would be the gsprint.exe.

>	The other matter would be: is the shell that command is passed off
>to using the same encoding?

That would be the windows shell (command prompt) and I know so little of
windows so I would not know...

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *




From exarkun at divmod.com  Thu May  8 11:50:42 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 8 May 2008 11:50:42 -0400
Subject: How to kill Python interpreter from the command line?
In-Reply-To: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <20080508155042.6859.1822443718.divmod.quotient.60559@ohm>

On Thu, 8 May 2008 08:29:33 -0700 (PDT), spectrumdt at gmail.com wrote:
>Hello.
>
>I am running Fedora Linux and KDE, using the Konsole command line.
>
>When coding Python, I regularly make a bug causing my program to not
>terminate. But how do I kill the non-terminating Python interpreter
>without killing the entire Konsole?
>
>The default way of killing the current process on the command line is
>Ctrl+C, but that doesn't work with Python. Neither do the "terminate
>task", "suspend task" or "interrupt task" commands (available from
>right-click in Konsole).

Ctrl+C often works with Python, but as with any language, it's possible
to write a program which will not respond to it.  You can use Ctrl+\
instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
Ctrl+\ sends SIGQUIT which typically isn't) or you can use the kill
command.  You can either use it in another terminal or you can suspend
the Python process (Ctrl+Z which sends SIGSTOP and _cannot_ be masked
or otherwise ignored) and then use kill in that terminal.  You need to
know the PID or jobspec in order to use kill.  In bash (and probably
elsewhere), jobspecs are easy.  When you hit Ctrl+Z, the jobspec will
be written to your terminal in the form "[N]+ Stopped       python". "N"
is the jobspec and you can kill it with "kill %N".  You may need to use
SIGKILL to end the process, in which case use "kill -KILL %N".  You can
then resume the Python process with the "fg" command, it will immediately
end since it has be killed.

This is more a Linux/bash/etc question than a Python question, so followups
might be directed to a more appropriate forum (eg, the man page for your
shell, or a bash user group, etc).

Jean-Paul


From jstucklex at attglobal.net  Fri May 23 07:42:39 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Fri, 23 May 2008 07:42:39 -0400
Subject: php vs python
In-Reply-To: <48369413$0$25059$607ed4bc@cv.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <WvSdna4685IhMKvVnZ2dnUVZ_o2dnZ2d@comcast.com>

Andrew Lee wrote:
> notbob wrote:
>> I'm not posting this just to initiate some religious flame war, though 
>> it's
>> the perfect subject to do so.  No, I actaully want some serious advice 
>> about
>> these two languages and since I think usenet is the best arena to find 
>> it,
>> here ya' go.
>>
>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  
>> Yet, I
>> want learn the guts of it instead of just booting up some wordwank or
>> whatever.  I started to learn python, but heard php was easier or 
>> faster or
>> more like shell scripting or... fill in the blank.  Anyway, so I 
>> change over
>> to learning php.  Then I run across that blog, Coding Horror, and start
>> reading articles like this:
>>
>> http://www.codinghorror.com/blog/archives/001119.html
>>
>> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
>> much.  I can setup mysql and apache,, but don't know how to use 'em, 
>> really.
>> I use emacs and run slackware and can fumble my way through bash scripts,
>> but I can't really write them or do lisp.  I've taken basic basic and 
>> basic
>> C, but am barely literate in html.  Sometimes it seems overwhelming, 
>> but I
>> persevere because it's more fun/challenging than video games, which 
>> bore me
>> to tears. 
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
>> Would I be better served in the long run learning python, which claims 
>> to be
>> easy as pie to learn/program (still looks hard to me).  I admit I'm no 
>> code
>> geek.  But, I'm not completely brain dead, either, and I need 
>> something to
>> keep my geezer brain sparking.  What say ye?
>>
>> nb
> 
> Personally, I believe PHP would get you more productive more quickly for 
> a blog, but it is a potentially brain damaging language in terms of 
> really getting your juices flowing with programming.  It is not a 
> general purpose language and suffers from all the limitations of of a 
> tool designed for one job.  If you are interested in programming and the 
> blog is your path to that, stick with Python!  In particular, immerse 
> yourself in mod_python or look at a framework like Django or Pylons -- 
> the learning curve is steep for any of these technologies but they are a 
> full meal compared to saltine cracker and water of PHP.

And what job is that?  I have a lot of batch scripts written in PHP, for 
instance.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From tjreedy at udel.edu  Thu May  8 16:31:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 16:31:31 -0400
Subject: Running a python code periodically
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <fvvnv0$u20$1@ger.gmane.org>


"Maryam Saeedi" <ma.saeedi at gmail.com> wrote in message 
news:ee9cd3be0805080902g48e641bxbcf1d5578620defe at mail.gmail.com...
|I was wondering if you know how can I run a python code once every five
| minutes for a period of time either using python or some other program 
like
| a bash script.

I expect the following should work.

from time import sleep
while True: #or
# for i in range(nunber_of_cycles):
  do_whatever()
  sleep(600)

assuming do_whatever() is quick and you do not need exactly 5 minute 
intervals.


| I have asked this question before and some of you answered me but I still
| have problem. Most of the answers was to use cron and crontab which works 
on
| my computer but not if I want to do it on department's computer since I 
do
| not have permission to change those files. Is there any other way which 
does
| not need administrator permission?





From darcy at druid.net  Fri May 16 10:52:00 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 10:52:00 -0400
Subject: writing python extensions in assembly
In-Reply-To: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <20080516105200.eeafe010.darcy@druid.net>

On Fri, 16 May 2008 10:13:04 -0400
"inhahe" <inhahe at gmail.com> wrote:
> Can anyone give me pointers/instructions/a template for writing a Python 
> extension in assembly (or better, HLA)?

I am trying to imagine the requirements document for your project.

 - Must be error prone and hard to debug
 - Must take an order of magnitude longer to write
 - Must be unportable to other systems

Really, why don't you write your etension in C?  Do you really think
you will improve your code by writing it in assembler?  Even embedding
assembler in C code make it unportable and I find it hard to imagine
anything that you want to do in a Python context that can't be done at
least as well in C if not pure Python.

Just curious is all.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From Sizer at nospam.com  Thu May  8 05:25:02 2008
From: Sizer at nospam.com (Sizer)
Date: 8 May 2008 04:25:02 -0500
Subject: Can't drag and drop onto .py in Windows XP?
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
	<mailman.703.1210165759.12834.python-list@python.org>
Message-ID: <Xns9A981832F18E9sizernospamcom@216.40.28.87>

"Roger Upole" <rupole at hotmail.com> wrote in
news:mailman.703.1210165759.12834.python-list at python.org: 
> Sizer wrote:
>> It's just a little weird that I
>> can't just drag and drop file names onto .pyw or .py files. Am I
>> missing something here?
>>
>> Thanks for any help.
> 
> You can register a DropHandler for the Python file class.
> Put this in a .reg file and merge it into the registry:
> 
> REGEDIT4
> 
> [HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
> @="{86C86720-42A0-1069-A2E8-08002B30309D}"

Sir, you rock! I found that it actually worked a little better if I used 
a generic wsh drop handler instead of the .exe handler, but I would never 
have known where to start looking without your suggestion. I ended up 
with the following .reg file, and now I can drag and drop files onto my 
.py, .pyw, and .pyc files and off they go as you'd expect. It kind of 
seems like this should be the default installer behavior unless there's a 
good reason not to do it. Thanks again for your help.

REGEDIT4

[HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

[HKEY_CLASSES_ROOT\Python.NoConFile\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"

[HKEY_CLASSES_ROOT\Python.CompiledFile\shellex\DropHandler]
@="{60254CA5-953B-11CF-8C96-00AA00B8708C}"


From james at reggieband.com  Tue May  6 09:26:42 2008
From: james at reggieband.com (james at reggieband.com)
Date: Tue, 6 May 2008 06:26:42 -0700 (PDT)
Subject: Module to read input from commandline
References: <mailman.649.1210079867.12834.python-list@python.org>
Message-ID: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>

On May 6, 2:11?pm, pyt... at bdurham.com wrote:

> Check out the optparse module as well. The optparse module supercedes(?)
> the cmd module and offers a lot more functionality.

Hi Malcom,

Doesn't the optparse module work by parsing the arguments that are
passed to the script when it is invoked?

What I was looking for was a commandline read loop that executes
within a script that is already running ... or can optparse be used in
this context as well?

Thanks,
James.


From jgardner at jonathangardner.net  Wed May 21 13:48:28 2008
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: Wed, 21 May 2008 10:48:28 -0700 (PDT)
Subject: What replaces `` in py3k?
References: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>
Message-ID: <0ef180ba-6c67-425d-84c3-0b697cde27ea@v26g2000prm.googlegroups.com>

On May 21, 10:45?am, bukzor <workithar... at gmail.com> wrote:
> What are backticks going to be translated into?

repr


From gabriel.rossetti at arimaz.com  Mon May 26 08:32:32 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 14:32:32 +0200
Subject: b64encode and unicode problem
In-Reply-To: <g1e3nn$ddv$01$1@news.t-online.com>
References: <mailman.1606.1211797327.12834.python-list@python.org>
	<g1e3nn$ddv$01$1@news.t-online.com>
Message-ID: <483AADE0.9020708@arimaz.com>

Peter Otten wrote:
> Gabriel Rossetti wrote:
>
>   
>> Hello everyone,
>>
>> I am trying to encode a string using b4encode and I get the following
>> error :
>>
>>  >>> b64encode(u"Salut Pierre, comment ?a va?")
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>>     encoded = binascii.b2a_base64(s)[:-1]
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in
>> position 22: ordinal not in range(128)
>>
>> If I remove the "u" infront of the string, it works. The problem is that
>> I in my program, the string is given to me un unicode/utf-8. I tried
>> several things, but I still get it, How can I get it to work, anybody
>> have any idea?
>>     
>
>   
>>>> base64.b64encode(u"Salut Pierre, comment ?a va?".encode("utf8"))
>>>>         
> 'U2FsdXQgUGllcnJlLCBjb21tZW50IMOnYSB2YT8='
>
> unicode is a sequence of codepoints with no predetermined representation as
> a byte sequence. Therefore whenever you go from unicode to str you have to
> decide upon an encoding. If you don't make that decision python assumes
> ascii which will of course fail for non-ascii characters.
>
> Peter
>
>   
Ok, I get it better now, thanks!
Gabriel



From giuott at gmail.com  Tue May 13 09:17:40 2008
From: giuott at gmail.com (Giuseppe Ottaviano)
Date: Tue, 13 May 2008 15:17:40 +0200
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <579012D4-7B2B-4482-9B20-8B5C404ABCC5@gmail.com>


On May 13, 2008, at 12:28 PM, dannywebster at googlemail.com wrote:

> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
>>>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
>>>> f=str(f)
>>>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]

If the file is really big, you may want not to construct an actual  
list with all the words, but instead use an iterator. If you define  
the function

def ichain(seq):
	for s in seq:
		for x in s: yield x

(which is often useful and I don't think it has been included in  
itertools) you can iterate lazily on the file:

hosts = ichain(s.split() for s in f)
for host in hosts:
	# ...

HTH,
Giuseppe



From bignose+hates-spam at benfinney.id.au  Wed May 21 21:54:42 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 May 2008 11:54:42 +1000
Subject: backport of 'set' to python 2.3?
References: <mailman.1459.1211420324.12834.python-list@python.org>
Message-ID: <871w3vdrx9.fsf@benfinney.id.au>

"Daniel Fetchinson" <fetchinson at googlemail.com> writes:

> Does anyone have a pure python implementation of the builtin 'set'
> object so that I could use that in python 2.3?

Yes. You have one in Python 2.3 already
<URL:http://www.python.org/doc/2.3.5/lib/module-sets.html>, it's just
not a builtin.

> If this would be the case that would be really great as I wouldn't
> have to change my code that runs happily on 2.5

You will, but it's as simple as:

    try:
        set()
    except NameError:
        from sets import Set as set

You then know that 'set' refers to the set type from that point on (or
you're not on a version of Python that has a 'set' type at all).

-- 
 \      "I have a large seashell collection, which I keep scattered on |
  `\        the beaches all over the world. Maybe you've seen it."  -- |
_o__)                                                    Steven Wright |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Mon May 19 20:26:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 21:26:18 -0300
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
Message-ID: <op.ubffh4iwx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 17:58:48 -0300, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> escribi?:

> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
> (snip)
>> The main
>> concept here: identity [usually] implies equality,
>
> I really enjoyed the "usually" disclaimer !-)

In some *rare* cases, identity does not imply equality:

py> inf = 1e300*1e300
py> nan = inf-inf
py> nan
-1.#IND
py> nan is nan
True
py> nan == nan
False

-- 
Gabriel Genellina



From castironpi at gmail.com  Fri May  9 16:17:57 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 13:17:57 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org> 
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com> 
	<sQZUj.125646$rd2.117530@pd7urf3no>
Message-ID: <1c8a388a-4d04-4152-9b6e-3d64d96ec7f0@24g2000hsh.googlegroups.com>

On May 9, 10:11?am, Yves Dorfsman <y... at zioup.com> wrote:
> castiro... at gmail.com wrote:
> > The only thing is, is there is another natural meaning to [a,b:c].
>
> > Counting grids on the diagonals, the rational set is well defined:
>
> > 0: 0, 0
> > 1: 1, 0
> > 2: 0, 1
> > 3: 2, 0
> > 4: 1, 1
> > 5: 0, 2
> > 6: 3, 0
> > 7: 2, 1
> > ...
>
> > Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined. ?Thencefore,
>
> > a,b:c,d
>
> > is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].
>
> I'm not sure what you mean here. Could you give me a simple piece of code to
> show an example ?
>
> Yves.http://www.SollerS.ca- Hide quoted text -
>
> - Show quoted text -

Yves, sadly, simple piece of code is not the writer's forte.  I was
merely advising against leaping in to syntax additions, changes even.
The point was, even though a,b:c,d is shown ill-defined, a,b:c may not
be.


From p.selvaraj2008 at gmail.com  Wed May 14 01:50:10 2008
From: p.selvaraj2008 at gmail.com (p.selvaraj2008 at gmail.com)
Date: Tue, 13 May 2008 22:50:10 -0700 (PDT)
Subject: hai friend
Message-ID: <30014ac9-4022-40c5-965c-87a3eef85c16@l28g2000prd.googlegroups.com>

hai friend how are you i wish to all of your successfull works
and learn more money

www.yourambition.blogspot.com


From mikael at isy.liu.se  Tue May 13 03:12:54 2008
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 13 May 2008 09:12:54 +0200
Subject: passing *args "recursively"
In-Reply-To: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <g0b2ot$mls$1@news.lysator.liu.se>

Guillermo wrote:
> This must be very basic, but how'd you pass the same *args several
> levels deep?
> 
> def func2(*args)
>     print args # ((1, 2, 3),)
>     # i want this to output (1, 2, 3) as func1!
>     # there must be some better way than args[0]?
> 
> def func1(*args):
>     print args # (1, 2, 3)
>     func2(args)
> 
> func1(1,2,3)

func2(*args)

Thats all. See 
http://docs.python.org/tut/node6.html#SECTION006740000000000000000

/MiO


From xahlee at gmail.com  Sun May 25 19:25:33 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Sun, 25 May 2008 16:25:33 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
Message-ID: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>

For about the past 10 years, i have been concerned in the programing
community's level of education in social issues.

I have found that recently, a news that would be of interest to
programers.

There was a bet at longbets.org (run by Long Now Foundation) regarding
the importance of blogs. The bet was made in 2002. The prediction has
a resolution date in 2007.

In 2008, the bet is resolved. See

?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
 http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/

I'd like encourage, for many of you, who have lots of opinions on
technical issues or social issues surrounding software, to make use of
longbets.org. It can help shape your thoughts from blog fart to
something more refined. In any case, your money will benefit society.

here's some examples you could try:

? I bet that Java will be out of the top 10 programing languages by
2020.

? I bet that the top 10 programing languages in 2015 (as determined by
requirement from job search engine), the majority will be those
characterized as dynamic languages (e.g. php, perl, python,
javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
Haskell)).

? You bet that Linux as a desktop system will or will not have a
market share of such and such by the year xyz.

(I'm not sure the above ?predictions? are candidates on longbets.org,
since one of their rule is that the ?predictions? should be socially
important. Looking at existing entries on their site, the social
importance of the above items pale in comparison. (however, many of
their existing ?predictions? are somewhat fringe))

       *       *       *

Note, in almost all online forums where tech geekers gather (e.g.
newsgroups, slashdot, irc, etc), often they are anonymous, each fart
ignorant cries and gripes and heated arguments, often in a
irresponsible and carefree way.

One of the longbets.org's goal is to foster RESPONSIBILITY.

In recent years, i have often made claims that the Python's
documentation, it's writing quality and its documentation quality in
whole, is one of the worst.

Among all the wild claims in our modern world, from the sciences to
social or political issues, my claim about Python's technical writing
quality or its whole quality as a technical documentation, is actualy
trivial to verify by any standards. When presented to intellectuals of
the world at large, the claim's verifiability is trivial, almost as a
matter of fact checking (which are done by interns or newbie grads of
communinication/journalism/literature majors, working for journalism
houses). However, when i voiced my opinion on Python doc among
programing geekers online, it is often met with a bunch of wild cries.
Some of these beer drinking fuckheads are simply being a asshole,
which are expected by the nature of online tech geeking communities (a
significance percentage are bored young males). However, many others,
many with many years of programing experience as a professional,
sincerely tried to say something to the effect of ?in my opinion it's
good?, or voice other stupid remarks to the effect of ?why don't you
fix it?, and in fact find my claim, and its tone too fantastical, to
the point thinking i'm a youngling who are bent on to do nothing but
vandalism. (the tech geekers use in-group slang for this: ?troll?.)

The case of the Python doc is just one example. I have also, in the
past decade, in _appropriate_ online communties (e.g. newsgroups,
mailing lists), voiced opinions on Perl's doc, emacs's doc, criticism
on lisp nested syntax, ?software engineering? issues (e.g. OOP),
various issues of jargons and naming (e.g. currying, lisp1 vs lisp2,
tail recursion, closure), emacs's user interface issues, criticism on
the phenomenon of Open Source community's fervor for bug reporting,
criticism on IT industry celebrities such as Larry Wall and Guido von
Rossum, opinions on cross-posting, ... and others. Some of my claims
are indeed controversial by nature. By that i mean that there is no
consensus on the subject among its experts, and the issue is complex,
and has political implications. However, many trivially verifiable, or
even simple facts, are wildly debated or raised a ruckus, because the
programers are utterly ignorant of basic social knowledge, or due to
their political banding (e.g. a language faction, Open Source) or
current trends and fashions (e.g. OOP, Java, ?Patterns?, ?eXtreme
Programing?, ... , OpenSource and ?Free? software movement, ...).

I think, the founding of Long Now Foundation with its longbets.org,
shares a concern i have on the tech geeking communities. In
particular, tech geekers need to have a broader education on social
sciences, needs to think in long term, and needs to foster personal
responsibility, when they act or voice opinions on their love of
technology. (note: not reading more motherfucking slashdot or
motherfucking groklaw or more great podcasts on your beatific language
or your postmodernistic fuckhead idols)

(One thing you can do, is actually take a course on philosophy,
history, law, economics, in your local community college.)

Disclaimer: I have no affiliation with Long Now Foundation.

       *       *       *

See also:

?Responsible Software Licensing? (2003-07) by Xah Lee
 http://xahlee.org/UnixResource_dir/writ/responsible_license.html

?On Microsoft Hatred? (2002-02-23) Xah Lee
 http://xahlee.org/UnixResource_dir/writ/mshatred155.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From deets at nospam.web.de  Fri May 16 10:18:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 16:18:15 +0200
Subject: writing python extensions in assembly
In-Reply-To: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <695jdlF30fp0gU1@mid.uni-berlin.de>

inhahe schrieb:
> Can anyone give me pointers/instructions/a template for writing a Python 
> extension in assembly (or better, HLA)?

You could write a C-extension and embed assembly. See the docs for how 
to write one. If you know how to implement a C-callingconvention-based 
shared library in assembly (being an assembler guru you sure know how 
that works), you could mimic a C-extension.

Diez


From james at reggieband.com  Tue May  6 08:41:30 2008
From: james at reggieband.com (james at reggieband.com)
Date: Tue, 6 May 2008 05:41:30 -0700 (PDT)
Subject: Module to read input from commandline
References: <2e04b64c-9a12-4e20-8d5a-546a0ec4ac7f@m36g2000hse.googlegroups.com>
	<d094358f-d7c8-411c-8fd0-7896542a0942@a5g2000prg.googlegroups.com> 
	<bcf13695-1e1e-4df3-95ed-fc2e7c7b465c@l28g2000prd.googlegroups.com>
Message-ID: <a9378cd0-3a9d-4b42-81b2-50e991921e13@27g2000hsf.googlegroups.com>

On Apr 13, 9:05?pm, ja... at reggieband.com wrote:
> On Apr 13, 7:44 pm, thashoo... at farifluset.mailexpire.com wrote:
>
> > What you're looking for is no module, it is included in the standard
> > python namespace.
> <snip>
> > raw_input
>
> Thanks for the response GL.
>
> What I am looking for is a module to wrap raw_input so it can handle
> some of the validation.

Looks like I found the module after-all:
http://blog.doughellmann.com/2008/05/pymotw-cmd.html
http://docs.python.org/lib/module-cmd.html

The cmd module does what I want and more.

Just wanted to post this in-case someone finds this through a search.

cheers,
James


From gnewsg at gmail.com  Sun May  4 14:38:06 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sun, 4 May 2008 11:38:06 -0700 (PDT)
Subject: Determine socket family at runtime
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
	<pan.2008.05.04.17.18.39.99752@virgilio.it>
Message-ID: <43a969df-0098-4fab-a736-fb92d5b75aca@26g2000hsk.googlegroups.com>

On 4 Mag, 19:18, Francesco Bochicchio <bock... at virgilio.it> wrote:
> On Sun, 04 May 2008 08:49:55 -0700, Giampaolo Rodola' wrote:
> > Hi there,
> > since the socket.socket.family attribute has been introduced only in
> > Python 2.5 and I need to have my application to be backward compatible
> > with Python 2.3 and 2.4 I'd like to know how could I determine the
> > family of a socket.socket instance which may be AF_INET or AF_INET6.
> > Is there some kind of getsockopt() directive I could use?
> > For now I've been able to determine the family by using:
>
> > # self.socket = a connected socket.socket instance
> > ip, port = self.socket.getsockname()[0:2]
> > af = socket.getaddrinfo(ip, port)[0][0]
>
> > ...but I'd like to know if some other solution is preferable.
>
> > Thanks.
>
> > --- Giampaolo
> >http://code.google.com/p/pyftpdlib
>
> Ciao,
>
> what about wrapping the socket type and ?adding a 'family' attribute
> to the base socket class? Something like:
>
> class SocketWrapper(socket.socket): ? ?def __init__(self, family, type, proto=0): ? ? ? ? ? ? socket.socket.__init__(self, family, type, proto) ? ? ? ? ? ? ?self.family = family
>
> then you have just to create the sockets with SocketWrapper insetead of
> socket.socket. For the rest of your code it would not matter, and then you
> are sure to always have a .family attribute.
>
> Ciao
> ----
> FB- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Ciao,
I don't think that it would be possible since the socket I'm talking
about is returned by socket.socket.accept().


--- Giampaolo
http://code.google.com/p/pyftpdlib


From jcd at sdf.lonestar.org  Fri May 16 10:15:33 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 16 May 2008 10:15:33 -0400
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
	<9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
Message-ID: <1210947333.3766.9.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-16 at 06:04 -0700, globalrev wrote:
> On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
> > Christian Heimes wrote:
> > > globalrev schrieb:
> > >> cust1 = customer.__init__('12',['1','435','2332'])
> >
> > > cust1 = customer('12',['1','435','2332'])
> >
> > ... and before that
> >
> > from customer import customer
> >
> > Peter
> 
> why do i have to write that?
> 
> if i do import customer im importing everything no?
> 

Not exactly.  That's how perl and PHP tend to do it, but python's import
system is much more conservative (and far superior because of it).  When
you import a name you get that name and nothing else.  You can still
call your class without doing from customer import customer, but you
have to include the module in the class name like this:

cust1 = customer.customer('12',['1','435','2332'])

Everything stays hidden behind the name customer.  That way, if customer
defines a class that has the same name that you already have in your
namespace, it won't get overwritten.  Say you define a class Purchase in
your customer module, and then in the interpreter, you write

py>>> import customer
py>>> Purchase = 4
py>>> bread = customer.Purchase('bread')
py>>> Purchase
4
py>>> bread
<customer.Purchase object at 0xabcdefab>
py>>>

Purchase and customer.Purchase can live happily side by side.  In perl
or PHP, the default behavior causes errors which are hard to debug
because you can't see what names are being pulled into your namespace.

> but youre right it doesnt work unless i do, i just dont get why.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From workitharder at gmail.com  Wed May 21 13:45:58 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 10:45:58 -0700 (PDT)
Subject: What replaces `` in py3k?
Message-ID: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>

In Python 3, backticks (``) are being removed. The plan is to create
an automatic way to port python2 programs to python3, so my question
is:

What are backticks going to be translated into? I tried looking at the
2to3 fixer source code, but as far as I can tell they haven't written
that part yet.

http://svn.python.org/view/sandbox/trunk/2to3/lib2to3/fixes/



From bj_666 at gmx.net  Fri May 30 02:02:42 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 May 2008 06:02:42 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
Message-ID: <6a9jk2F364dj7U1@mid.uni-berlin.de>

On Thu, 29 May 2008 17:57:45 -0400, D'Arcy J.M. Cain wrote:

> I guess I am still new to this group and don't understand its charter.
> I wasn't aware that it was a Flaming Blunder group.  Can someone please
> point me to a newsgroup or mailing list dedicated to the Python
> programming language?

By discussing language design of FT compared to other languages you can
learn about Python.  We all know that Python is brilliant -- here's the
opportunity to think about why it is.  :-)

And it's basically only this very long thread, so it's easy to filter and
ignore in a decent news reader.

Ciao,
	Marc 'BlackJack' Rintsch


From matthieu.brucher at gmail.com  Sun May 11 18:17:34 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Mon, 12 May 2008 00:17:34 +0200
Subject: Some error messages in Python are ugly
In-Reply-To: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <e76aa17f0805111517i1b2556efsc9cf4d027df4ef77@mail.gmail.com>

Please, really please, stop asking question and go read some books about/get
some courses on Linux shell and then finally Python.
Before you do that, the only thing will have is upset people telling you to
_think_ (clearly that's something you are n,ot used to do, but you will have
to start at some point) before sending a mail.

Matthieu

2008/5/11 <wxPythoner at gmail.com>:

> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From basti.wiesner at gmx.net  Sat May 31 10:39:21 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 16:39:21 +0200
Subject: File browser in python gui
References: <4841353e_1@news.tm.net.my>
Message-ID: <g1rnuq$fqj$03$1@news.t-online.com>

[ TheSaint <fc14301589 at icqmail.com> ]


> I've started to build a GUI for my Mailsweeper by the help of QT4
> Designer. I came across the problem that there isn't any prebuild file
> browser like Kdialog.
> I know some other sample, but PyGTK builded. I'm not happy to use a
> different widget set or to have to design my own file browser with QT4
> widgets. It's almost thousand times people need to use such browser, I
> wonder why I couldn't find one on the entire day searching on web site.
> A QT XML file (.ui extension) should do fine, if someone would help :)

What about QtGui.QFileDialog?

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Tue May  6 06:37:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:37:39 +0200
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
Message-ID: <68aqoeF2rue80U1@mid.uni-berlin.de>

spectrumdt at gmail.com wrote:

> Hello.
> 
> I am trying to install Pypvm (http://pypvm.sourceforge.net/), the
> Python interface to PVM ("Parallel Virtual Machine"). Unfortunately,
> installation fails. I am hoping someone can help me fix it.
> 
> I am running Fedora Core 8 Linux.
> 
> The official Pypvm documentation is very helpful (or something),
> providing the following:
> 
> 
> 
> To build Pypvm, cross your fingers and try:
> 
> make -f Makefile.pre.in boot
> make
> 
> Or alternatively, try
>   python setup.py build
>   python setup.py install
> 
> 
> 
> For me, the "make -f Makefile.pre.in boot" seems to run fine, but the
> "make" fails, giving (among other things) the following:
> 
> 
> 
> [ore at localhost pypvm-0.94]$ make
> gcc -pthread -fPIC -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
>   -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -
> march=i386
>   -mtune=generic -fasynchronous-unwind-tables -D_GNU_SOURCE -fPIC
>   -I/usr/include/python2.5 -I/usr/lib/python2.5/config    -c
>   ././pypvm_coremodule.c -o ./pypvm_coremodule.o
> ././pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
> ././pypvm_coremodule.c: In function ?was_error?:
> ././pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in
> this function)
> ././pypvm_coremodule.c:81: error: (Each undeclared identifier is
> reported only once
> ././pypvm_coremodule.c:81: error: for each function it appears in.)
> ././pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use
> in this function)
> ././pypvm_coremodule.c:85: error: ?PvmMismatch? undeclared (first use
> in this function)
> [...]
> ././pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first
> use in this function)
> ././pypvm_coremodule.c:1767: warning: unused variable ?optModule?
> ././pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
> ././pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
> ././pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
> ././pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
> ././pypvm_coremodule.c:1762: warning: unused variable
> ?exceptionModule?
> make: *** [pypvm_coremodule.o] Error 1
> [ore at localhost pypvm-0.94]$
> 
> 
> 
> In in alternate version, "python setup.py build" similarly fails:
> 
> 
> 
> [ore at localhost pypvm-0.94]$ python setup.py build
> running build
> running build_py
> running build_ext
> building 'pypvm_core' extension
> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-
> D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
> size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables -
> D_GNU_SOURCE -fPIC -fPIC -I/usr/include -I/usr/include/python2.5 -c
> pypvm_coremodule.c -o build/temp.linux-i686-2.5/pypvm_coremodule.o
> pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
> pypvm_coremodule.c: In function ?was_error?:
> pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in this
> function)
> pypvm_coremodule.c:81: error: (Each undeclared identifier is reported
> only once
> pypvm_coremodule.c:81: error: for each function it appears in.)
> pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use in
> this function)
> [...]
> pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first use in
> this function)
> pypvm_coremodule.c:1767: warning: unused variable ?optModule?
> pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
> pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
> pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
> pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
> pypvm_coremodule.c:1762: warning: unused variable ?exceptionModule?
> error: command 'gcc' failed with exit status 1
> [ore at localhost pypvm-0.94]$
> 
> 
>
> Can anyone help me get it to work?

You need to check which package provides the  "pvm3.h"-include-file and
install that. Usually, these are *-dev(el)?-packages.

Diez


From __peter__ at web.de  Thu May 22 02:11:11 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 May 2008 08:11:11 +0200
Subject: Bit of List replacing trouble (newbie)
References: <mailman.1463.1211432419.12834.python-list@python.org>
Message-ID: <g132pv$89v$01$1@news.t-online.com>

Zethex wrote:

> At the moment i'm doing a piece of work for school and I'm stuck at the
> moment.
> 
> I have a list of words, for example:
> 
> Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']
> 
> I have another list which I need to use to replace certain words, and its
> in the form of:
> 
> synonyms = [
>                   [canine, [dog, puppy, bulldog]],
>                   [ road, [street, avenue, court]]
>                                                              ]
> What the procedure must do is replace dog with canine, and street with
> road. Therefore if a word is in the sentence and appears on the right side
> of the list entry, replace it with the left entry.
> 
> I can't seem to find a help file with what I'm after.  I'm just wondering
> if anyone can help me on the right track on how to start this procedure,
> maybe not an answer but just a little help on how to get started as I'm
> complete stuck right now.

See if you can put the synonyms in a dict:

syndict = {"dog": "canine", "puppy": "canine", ..., "court": "road"}

The code to achieve that should consist of two nested loops. 
You can then look up a word easily with

word = syndict.get(word, word) 

Put that into another loop iterating over the words of the original sentence
and build the new sentence by appending to a fresh list.

Peter



From gagsl-py2 at yahoo.com.ar  Fri May  2 12:35:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 13:35:44 -0300
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<4819B2F1.9030100@cheimes.de>
Message-ID: <op.uajcdurhx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 09:09:21 -0300, Christian Heimes <lists at cheimes.de>  
escribi?:

> illume schrieb:
>> Has anyone tested the new python binaries that link to msvcr90.dll on
>> win9x machines?
>
> It doesn't matter to use because Python 2.6 and 3.0 require at least
> Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.

That should be menctioned in the What's new? document - I could not find  
any reference.

-- 
Gabriel Genellina



From svetoslav.agafonkin at gmail.com  Sat May  3 07:52:01 2008
From: svetoslav.agafonkin at gmail.com (svetoslav.agafonkin at gmail.com)
Date: Sat, 3 May 2008 04:52:01 -0700 (PDT)
Subject: How to use a parameter in a class
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <9ea30fa0-7c79-46a7-a4af-d0a5e73bcf73@e53g2000hsa.googlegroups.com>

On May 3, 1:05?pm, Decebal <CLDWester... at gmail.com> wrote:
> I have the following class:
> #####
> class Dummy():
> ? ? value = 0
> ? ? def __init__(self, thisValue):
> ? ? ? ? print thisValue
> ? ? ? ? self.value = thisValue
> ? ? ? ? value = thisValue
>
> ? ? def testing(self):
> ? ? ? ? print 'In test: %d' % self.value
>
> ? ? def returnValue(self):
> ? ? ? ? return self.value
>
> ? ? result = someFuntion(default = value)
> #####
>
> But the last line does not work.
> I would like to do a call like:
> ? ? dummy = Dummy(thisValue = 12)
>
> And that someFunction gets a default value of 12. How can I do that?

The line
>     result = someFuntion(default = value)
is executed when the whole 'class' compound statement is executed,
i.e.
before the line that creates the 'dummy' instance. Moreover, this
happens only once and not every time you create a new instance of
the class. If you want 'result' to be a class attribute that is set
every time you create a new instance move the line
>     result = someFuntion(default = value)
in the __init__ constructor (you also have to assign some value to it
before,
just like the 'value' attribute and preffix it with Dummy. otherwise
it'll
be considered as local name of __init__):

 class Dummy():
     value  = 0
     result = 0

     def __init__(self, thisValue):
         print thisValue
         self.value   = thisValue
         Dummy.value  = thisValue
         Dummy.result = someFuntion(default = Dummy.value)

    def testing(self):
        ...


From workitharder at gmail.com  Fri May 23 02:26:59 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 23:26:59 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
Message-ID: <9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>

On May 22, 5:29?pm, "inhahe" <inh... at gmail.com> wrote:
> "bukzor" <workithar... at gmail.com> wrote in message
>
> news:55bc8846-107e-461a-89de-25c83cbcfa27 at 2g2000hsn.googlegroups.com...
>
> > This question seems easy but I can't figure it out.
> > Lets say there's a function:
>
> > def f(a, *args):
> > ? ?print a
> > ? ?for b in args: print b
>
> > and elsewhere in your program you have a list and a dict like this:
> > args = [2, 3]
> > kwargs = {'a':1}
>
> > I'd like to get f() to print something like the following, but I can't
> > figure out how.
> > 1
> > 2
>
> I think there's no 'standard' way to do this. but:
>
> import inspect
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>
> i don't know if it works because i'm afraid to try it. ?if it doesn't the
> solution is something similar to that.

That does, in fact work. Thanks! I'm a little sad that there's no
builtin way to do it, owell.

>>> def f(a, *args):
...     print a
...     for b in args: print b
...
>>> import inspect
>>> a = [2,3]
>>> b = {'a':1}
>>> inspect.getargspec(f)
(['a'], 'args', None, None)
>>> map(b.get, inspect.getargspec(f)[0])
[1]
>>> map(b.get, inspect.getargspec(f)[0]) + a
[1, 2, 3]
>>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
1
2
3


From ppearson at nowhere.invalid  Fri May 30 10:50:36 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Fri, 30 May 2008 09:50:36 -0500
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
	<CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>
Message-ID: <lcudnS3wCdehid3VnZ2dnUVZ_uednZ2d@supernews.com>

On Thu, 29 May 2008 20:27:35 -0500, Larry Bates wrote:
> abhishek wrote:
>> Hi group, recently my employer asked me too implement encryption/
>> decryption for secure data transfer over internet. Problem is that the
>> client application is written using C# and the webserver where i need
>> to store the information is developed using python.
>> 
>> My situation of dilemma is which cryptographic method suits me best
>> for this purpose.
>> 
>> Help/Suggestions are urgently required

The proper newsgroup for this question is sci.crypt.

Data security is a complex and difficult problem, and you are likely
to fail in the worst possible way: implementing something that is
weak but that you believe to be strong.  Some advice: (1) Use
off-the-shelf products like PGP or GPG; don't write your own.
(2) Read Bruce Schneier's Applied Cryptography to get a feeling
for the dimensions of the problem. (3) Start by composing a
clear statement of what you need, avoiding vague terms like
"security".  If you don't know where you're going, you can't
tell whether you've arrived.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From jcd at sdf.lonestar.org  Fri May  9 12:08:17 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 12:08:17 -0400
Subject: A question about python and xml
In-Reply-To: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
References: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>
Message-ID: <1210349297.3332.53.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-09 at 08:39 -0700, Holden wrote:
> Hello everyone I heard this was a good community to go too for help
> and advice. I want to make a web site that uses the python programming
> language which I am VERY new at. This website would store simple data
> such as names in a form. At first I wanted to use mysql to store the
> data but I want to export the data using xml.
> 
> So say if a user logged in they would be able to store there basic
> information in an xml file and download it whenever. Is that possible
> using XML and Python. I am sorry if this post doesn't make much sense
> but any advice would be greatly appreciated. You can also e-mail me if
> you need further information or clarification.
> 
> Thanks
> 
> Holden
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

A general question will only get you a general answer, but yes, it's
very possible.  

You'll want to look into the cgi module (in the standard library)for
basic, ground level server/browser communication.  You might also be
interested in using a web framework, for keeping your site design clean
and manageable.  I recommend Django from my own experience, but you
might also look into turbogears, pylons, webpy, or any of a number of
other well-regarded options.  The downside to using a framework is that
it's another set of things to learn, which, if you're just starting out
with python, might be a bit much to chew, but they can be very helpful
with maintenance down the line.

For XML processing, lxml.etree or ElementTree should suit your needs.
ElementTree is included in the standard library of recent versions of
python, though lxml is easily downloadable, and adds a couple bells and
whistles.  There are other options available, but those are
straightforward to use, and well designed.

Good luck with your site.

Cheers,
Cliff




From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:25:47 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:25:47 +0200
Subject: [x for x in <> while <>]?
In-Reply-To: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <482be56f$0$10798$426a34cc@news.free.fr>

urikaluzhny a ?crit :
> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is
> there?

The answer is very probably in the itertools module.



From jym at cornsoft.com  Sun May  4 10:58:42 2008
From: jym at cornsoft.com (jym)
Date: Sun, 4 May 2008 09:58:42 -0500
Subject: Writing a aiff audio file problem?
Message-ID: <5078ba20805040758m3d5a5a00p9e7394b0e635e300@mail.gmail.com>

Hi all

I can not creat a usable audio file in the aiff format. The example code
below creates a wav file that I can listen to just fine. However, I just get
noise when I listen to the resulting aiff file. Is this a byte order
problem? I am using Python 2.5.2 on Windows XP. Any guidance on this issue
would be appreciated.

Thanks

jym

import pyaudio
import wave
import sys
import aifc

chunk = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 8000
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output"

p = pyaudio.PyAudio()

stream = p.open(format = FORMAT,
                channels = CHANNELS,
                rate = RATE,
                input = True,
                frames_per_buffer = chunk)

print "* recording"
all = []
for i in range(0, RATE / chunk * RECORD_SECONDS):
    data = stream.read(chunk)
    all.append(data)
print "* done recording"

stream.close()
p.terminate()

#write data to AIFF file
data = ''.join(all)
af = aifc.open(WAVE_OUTPUT_FILENAME + ".aiff", 'wb')
af.setnchannels(CHANNELS)
af.setsampwidth(p.get_sample_size(FORMAT))
af.setframerate(RATE)
af.writeframes(data)
af.close()

# write data to WAVE file
wf = wave.open(WAVE_OUTPUT_FILENAME + ".wav", 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(data)
wf.close()
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From prisoner_at_war at yahoo.com  Mon May 26 01:06:02 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Sun, 25 May 2008 22:06:02 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
Message-ID: <248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>

On May 25, 8:37 pm, "drobi... at gmail.com" <drobi... at gmail.com> wrote:
>
>
> See  http://www.python.org/dev/peps/pep-3105/
> That should answer all your questions.

Hey, thanks, I missed that one!

Not that I understand the rationale given (iman00b), but oh well, so
it looks like a real function now.

Might you have any idea, BTW, whether the upcoming "Head First
Programming" from O'Reilly, coming in August, will cover Python 3??
Unlikely, right?  Unless maybe if that guy Vern Ceder (the author) is
active in the Python development community??

I'd already pre-ordered the book...but it makes no sense to get a book
on "old" Python 2.x if it's just going to get deprecated in like a
year or two!  Then again, current Python programs would still work,
right?  I mean, once it's been done up as an executable...PySol or
something should still work, right?  (Sorry, iman00b, I don't really
know how this stuff works....)


From kyosohma at gmail.com  Mon May 26 20:36:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 26 May 2008 17:36:49 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com> 
	<g1fe4u$2cld$3@news.mtu.ru>
Message-ID: <dd0d8550-192b-4abe-9954-efa9070082c8@x41g2000hsb.googlegroups.com>

On May 26, 5:38?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:
> > On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> >> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> >> > > Thanks!
> >> > > Anyone know which library should i learn then?
>
> >> > Looks like you need to dive into Win32
> >> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
>
> (VS.85).aspxhttp://ms...
>
> >> > and others
> >> > combined with ctypes.
>
> >> > Ivan
>
> >> well, that seems extremely valuable but how can i implement those
> >> functions with python?
>
> > You know what I'm sorry, I will try to understand the ctypes lib before
> > bothering you.
>
> > thank you all!
>
> No need to sorry. I have actually found very valuable information athttp://www.brunningonline.net/simon/blog/archives/000652.html
> while googling to answer your question. I didn't know that such things
> are really possible with Python/Win32! It'll help me a lot. Thank you!
>
> Ivan

If you guys are going to go digging into the PyWin32 modules, make
sure you check this site out:

http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/pywin32/PyWin32.html

It has the docs for the distro and a link to the user's group too. Bot
have been very helpful to me.

Mike


From rocky at panix.com  Thu May 15 15:07:18 2008
From: rocky at panix.com (R. Bernstein)
Date: Thu, 15 May 2008 15:07:18 -0400
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
	<wihr6c33j1s.fsf@panix5.panix.com>
	<16f79f5a-ef95-41ce-a58d-3b513e201d35@56g2000hsm.googlegroups.com>
Message-ID: <wihr6c35qu1.fsf@panix5.panix.com>

castironpi <castironpi at gmail.com> writes:

> On May 15, 6:26?am, ro... at panix.com (R. Bernstein) wrote:
>> "Alan J. Salmoni" <salm... at gmail.com> writes:
>>
>> > I'm not sure if this is exactly what you're after, but try looking
>> > into the 'code' module.
>>
>> > It's fairly easy to make an interactive interpreter that runs within
>> > your program. If you import your programs variables into
>> > __main__.__dict__, you can have access to them which can be funky. You
>> > can even override the showtraceback method to catch various exceptions
>> > and do daft things like adding new methods to strings. I guess it
>> > would even be possible to have the commands compared to a list of
>> > commands and keywords to build a restricted interpreter, though how
>> > secure this would be against a determined attack is another matter.
>>
>> > Alan
>>
>> I think this (largely) does the trick. Thanks!
>>
>> I'm not sure about how to deal with globals yet which should come from
>> a stackframe f_globals. It might be possible to save and restore
>> __main__.__dict__ before and after the call to interact(). Probably
>> would have been cooler to design interact() to take a globals
>> parameter, same as eval does.
>>
>>
>>
>>
>>
>> > On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
>> >> The next release of pydb will have the ability to go into ipython from
>> >> inside the debugger. Sort of like how in ruby-debug you can go into
>> >> irb :-)
>>
>> >> For ipython, this can be done pretty simply; there is an IPShellEmbed
>> >> method which returns something you can call. But how could one do the
>> >> same for the stock python interactive shell?
>>
>> >> To take this out of the realm of debugging. What you want to do is to
>> >> write a python program that goes into the python interactive shell -
>> >> without having to write your own a read/eval loop and deal with
>> >> readline, continuation lines, etc.
>>
>> >> The solution should also allow
>> >> ?- variables/methods in the calling PYthon program to be visible
>> >> ? ?in the shell
>> >> ?- variables set in the interactive (sub) shell should persist after the shell
>> >> ? ?terminates, although this is a weaker requirement. POSIX subshells
>> >> ? ?for example *don't* work this way.
>>
>> >> There has been much written about how to embed Python from C, so I
>> >> suppose this may offer one way. And at worst, I could write
>> >> a C extension which follows how C Python does this for itself.
>>
>> >> But is there a simpler way?
>>
>> >> Thanks.- Hide quoted text -
>>
>> - Show quoted text -
>
> One threat is malicious code; sorry for this.

This is a little too cryptic for me. But then if we're talking
security, maybe obfuscation is in order. :-)

If this was meant as an explanation for why interact() only takes a
local parameter and none for global, security concerns are in fact why
you'd want to *add* that parameter: so that the caller could more easily
decide what interact sees as global. I haven't tried implementing a
__main__.__dict__ save, modify and restore around the interact(), but
I'll assume that this could be made to work.

If instead this was about the evils of writing a program that uses
code and calls interact, in general, debuggers and security are at
odds. In a highly secure environment, you probably want to disallow
any trace hook.  I think Ruby uses the global variable $SAFE with a
particular level setting for this purpose.


From cwitts at gmail.com  Wed May  7 06:14:55 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 7 May 2008 03:14:55 -0700 (PDT)
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
Message-ID: <3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com>

On May 7, 1:09?am, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson ?
>
> <mcrobert... at hotmail.com> wrote:
> > I'm having trouble opening a file in linux, whose path has spaces in it.
>
> > $ mkdir my\ test
> > $ echo test > my\ test/test.txt
> > $ python
>
> > ?>>> open('./my test/test.txt')
> > Exception
> > ?>>> open('./my\\ test/test.txt')
> > Exception
>
> Try a string literal by prefixing your path string with "r":
>
> open(r'./my test/test.txt')
>
> Seehttp://docs.python.org/ref/strings.html
>
> > but yet...
>
> > ?>>> import os
> > ?>>> os.chdir('./my test')
> > ?>>> open('./test')
>
> > works just fine.
>
> Couldn't test on Linux, but in Windows ...
>
> >>> os.chdir('C:\temp\my test')
>
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume label ?
> syntax is incorrect: 'C:\temp\\my test'
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

>>> os.chdir('C:/')
>>> os.getcwd()
'C:\\'
>>> os.chdir('C:\temp\my test')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
WindowsError: [Error 123] The filename, directory name, or volume
label syntax is incorrect: 'C:\temp\\my test'
>>> os.chdir('C:/temp/my test')
>>> os.getcwd()
'C:\\temp\\my test'

Windoze works fine if you hand it forward slashes.

>>> os.chdir('C:/')
>>> os.chdir(os.path.join('C:','temp','my test'))
>>> os.getcwd()
'C:\\temp\\my test'

And joining your target with os.path.join works to.


From bhawsar.vaibhav at gmail.com  Mon May  5 07:26:45 2008
From: bhawsar.vaibhav at gmail.com (Vaibhav.bhawsar)
Date: Mon, 5 May 2008 07:26:45 -0400
Subject: threading: getting latest elements from list/dict
In-Reply-To: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
References: <17d58cc40805050412l2cc0340cs2b84916d0af0760c@mail.gmail.com>
Message-ID: <17d58cc40805050426w3282bb3eyc9c1831d1d37d705@mail.gmail.com>

Hello
I have a thread updating a dictionary with new elements. How can I check for
new elements as they are inserted into the dictionary by the thread? In
general is it safe to read a dictionary or a list while it is being updated
by a running thread? Does the dictionary or list have to be locked while
reading?
many questions! :)
vaibhav
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From Scott.Daniels at Acm.Org  Sat May 24 09:49:20 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 24 May 2008 06:49:20 -0700
Subject: Unhandled exceptions checking
In-Reply-To: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <h4-dnbKmk4hWh6XVnZ2dnUVZ_u2dnZ2d@pdx.net>

Yosifov Pavel wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?

I've seen this a number of places.  Apparently there are a number
of programmers who find exceptions to be a problem to suppressed,
rather than an indicator of a deeper bug.  Your goal should be to
handle anticipatable problems where you can, and reveal the others,
not to make sure you cannot raise an exception.  Exceptions are
valuable in that they reveal "thinko"s, embrace what they tell you,
and don't look for mechanical ways to avoid them; test them out.

--Scott David Daniels
Scott.Daniels at Acm.Org


From max at alcyone.com  Sat May  3 17:14:23 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:14:23 -0700
Subject: list.index crashes when the element is not found
In-Reply-To: <6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
Message-ID: <8oudnccY4MgvSIHVnZ2dnUVZ_rzinZ2d@speakeasy.net>

Jeff wrote:

> The generally used idiom for that is:
> 
> lst = ['a', 'b', 'c']
> if 'a' in lst:
>   foo = lst.index('a')

It's not a very good idiom, since it iterates over the list twice 
unnecessarily:  first, to see if the object is in the list; then, to 
find the index of that object.  That's pointless wasteful.

The Pythonic idiom is to catch the exception and then deal with it as 
desired.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From arnodel at googlemail.com  Mon May 12 11:15:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 08:15:31 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
Message-ID: <caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>

On 12 May, 15:21, Mark Dickinson <dicki... at gmail.com> wrote:
> On May 12, 2:09?am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> > It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well
> > defined whether y is 0 or not, even though there is a discontinuity in the
> > limit.
>
> Well, there's a difference: ?the limit of exp(y*log(x)) as (x, y) ->
> (0, a) exists for all finite nonzero a. ?The limit as (x, y) ->
> (0, 0) doesn't.

But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
which is not the x=0 axis (I think at least - it seems easy to prove
that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).  This should cover
most practical uses?

--
Arnaud


From mark.deverter at dads.state.tx.us  Tue May 20 15:32:32 2008
From: mark.deverter at dads.state.tx.us (Deverter,Mark)
Date: Tue, 20 May 2008 14:32:32 -0500
Subject: subscribe
Message-ID: <C98621D17B337E4284E03A4BAA76F6A53006F981@ausmis09.dhs.state.tx.us>

 

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From rdahlstrom at directedge.com  Thu May 29 07:03:40 2008
From: rdahlstrom at directedge.com (Dahlstrom, Roger)
Date: Thu, 29 May 2008 07:03:40 -0400
Subject: [python-win32] How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>

-----Original Message-----
> From: python-win32-bounces at python.org [mailto:python-win32-bounces at python.org] On Behalf Of Tim Golden
> Sent: Thursday, May 29, 2008 4:11 AM
> To: Python-Win32 List; python-list at python.org
> Cc: Python-Win32 List
> Subject: Re: [python-win32] How to get all the variables in a python shell
> 
> lixinyi.23 at gmail.com wrote:
> > I'm currently working on a scientific computation software built in
> > python.
> > What I want to implement is a Matlab style command window <->
> > workspace interaction.
> > 
> > For example, you type 'a=1' in the command window, and you see a list
> > item named 'a' in the workspace.
> > You double click the icon of the item, and you see its value. You can
> > modify the value of the list item,
> > 1 -> 100 etc,  after which if you go back to the command window and
> > type 'a'  and press enter, you see that
> > varable a's value has been changed to 100.
> > 
> > So my question is : if you have two DOS command windows running under
> > WINDOWS OS, how can you make them share the same internal variable
> > buffer? Or is there any easier way to implement such kind of
> > interaction?
> 
> I stronly suggest you look at IPython [1]. To do what I think
> you're describing, you'd need to hack or reimplement the interpreter.
> And that's what they've done. ISTR that they even have a branch
> which is dealing with parallel instances.
> 
> TJG
> 
> [1] http://ipython.scipy.org/moin/
> _______________________________________________
> python-win32 mailing list
> python-win32 at python.org
> http://mail.python.org/mailman/listinfo/python-win32


I'd try looking at memcached (http://www.danga.com/memcached/apis.html).  No hacking or reimplementation of the interpreter would be necessary, and there's a
Python api available.  I haven't used it for anything production related, but I have played with it a bit, and it's fast and stable.



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From bearophileHUGS at lycos.com  Sun May 25 17:39:28 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 25 May 2008 14:39:28 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com> 
	<83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>
Message-ID: <59719846-588e-414e-a1b9-cc7b04019501@k37g2000hsf.googlegroups.com>

This may have some bugs left, but it looks a bit better:

from inspect import getargspec

class HashableFunction(object):
    """Class that can be used to wrap functions, to allow their
hashing,
    for example to create a set of unique functions.

    >>> func_strings = ['x', 'x+1', 'x+2', 'x']
    >>> func_list1 = [eval('lambda x:' + func) for func in
func_strings]
    >>> func_set = set(HashableFunction(f) for f in func_list1)
    >>> len(func_set)
    3
    >>> set(f(10) for f in func_set) == set([10, 11, 12])
    True

    >>> func_list2 = [lambda x=1: x, lambda x: x]
    >>> len(set(HashableFunction(f) for f in func_list2))
    2

    >>> class Foo:
    ...   def __eq__(self, other): raise NotImplementedError
    >>> func_list3 = [lambda x=Foo(): x, lambda x=Foo(): x]
    >>> set(HashableFunction(f) for f in func_list3)
    Traceback (most recent call last):
      ...
    NotImplementedError
    """
    # Original code by I V <ivlenin at gmail.com>, 25 May 2008,
    # http://groups.google.com/group/comp.lang.python/browse_thread/thread/a973de8f3562675c
    # modified by bearophile
    def __init__(self, func):
        self._func = func
        signature = getargspec(func)
        self._hash = hash(self._func.func_code) ^ \
                     hash(tuple(signature[0]) + tuple(signature[1:3]))
    def __eq__(self, other):
        return self._func.func_code == other._func.func_code and \
               getargspec(self._func) == getargspec(other._func)
    def __hash__(self):
        return self._hash
    def __call__(self, *args, **kwargs):
        return self._func(*args, **kwargs)

I haven't put a full hashing of getargspec(self._func) too into the
__init__() because it may contain too much nested unhashable
structures, but the __eq__() is able to tell them apart anyway, with
some collisions.

Bye,
bearophile


From bruno.desthuilliers at gmail.com  Fri May 16 17:34:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:34:58 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
Message-ID: <fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>

On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
> Dan Upton wrote:
> > for pid in procs_dict:
> >   if procs_dict[pid].poll() != None
> >    # do the counter updates
> >    del procs_dict[pid]
>
> > The problem:
>
> > RuntimeError: dictionary changed size during iteration
>
> I don't know if the setup with the pids in a dictionary is the best way to
> manage a pool of processes... I'll leave it others, presumably more
> knowledgable, to comment on that. :-)  But I can tell you how to solve the
> immediate problem:
>
>    for pid in procs_dict.keys():

I'm afraid this will do the same exact thing. A for loop on a dict
iterates over the dict keys, so both statements are strictly
equivalent from a practical POV.


From deets at nospam.web.de  Thu May 22 06:57:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 12:57:19 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
	<f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>
Message-ID: <69l1teF33eaduU1@mid.uni-berlin.de>

> 
> This person who started this thread posted the calculations showing
> that Python was doing the wrong thing, and filed a bug report on it.
> 
> If someone pointed out a similar problem in Flaming Thunder, I would
> agree that Flaming Thunder was doing the wrong thing.
> 
> I would fix the problem a lot faster, though, within hours if
> possible.  Apparently this particular bug has been lurking on Bugzilla
> since 2003: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323

I wonder how you would accomplish that, given that there is no fix.

http://hal.archives-ouvertes.fr/hal-00128124

Diez




From cjw at ncf.ca  Thu May  8 09:51:26 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 09:51:26 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <mailman.767.1210253316.12834.python-list@python.org>
References: <fvut8a$b67$1@theodyn.ncf.ca>
	<mailman.767.1210253316.12834.python-list@python.org>
Message-ID: <4823055E.9090207@ncf.ca>

Gabriel Genellina wrote:
> En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:
> 
>> The readme.txt has:
>>
>> All you need to do is open the workspace
>> "pcbuild.sln" in Visual Studio,
>> select the desired combination of
>> configuration and platform and eventually
>> build the solution. Unless you are going
>> to debug a problem in the core or
>> you are going to create an optimized
>> build you want to select "Release" as
>> configuration.
>>
>> Unfortunately, the Express Edition
>> (Free) doesn't handle "solution" files.
> 
> Yes, it does. You get a warning saying that solution *folders* aren't supported; that just means that you won't see those 26 projects nicely grouped, only as a long list, that's all... Python builds fine with Visual C++ Express Edition.
> Select Release, Win32 from the dropdown lists, press F7, and wait for compilation to complete...
> 
Many thanks.  Yes, you are right.

Colin W.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:37:01 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:37:01 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <48240d2d$0$30967$426a34cc@news.free.fr>

Raxit at MyKavita.com a ?crit :
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#.


Err... You saw a Python helloworld and a Java helloworld and you found 
them "very similar" ???

> What's different (except
> syntax) ?

dynamism (and not only wrt/ the type system), higher order functions, 
closures, lazy evaluation... and fun.

> what can i do easily with python which is not easy in c++/java !?

Enjoy writing a working app focusing on the problem to solve instead of 
wasting time writing boilerplate code and going thru hoops just to 
satisfy the compiler.


From alan.wright at volubill.com  Wed May 21 06:47:59 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 11:47:59 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>

Thanks Roy

Any ideas how to code this child process stuff, as I said I am newbie and 
not from a coding background

to be honest ideally yes, i'd get 50K, but if i can get above 30K that would 
be OK

Alan

"Roy Smith" <roy at panix.com> wrote in message 
news:roy-27A881.20583919052008 at 70-1-84-166.area1.spcsdns.net...
> In article <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d at pipex.net>,
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks for the feedback.
>>
>> Using the socket in a list is great
>>
>> However, as i imagined, I now get a limit of around 1500 conns before the
>> system crashes out, also i have noticed, that the ports loop back to 1025
>> when they hit 5000.
>>
>> Any ideas on how to make the list/socket get to around 50K
>
> Yikes.  Not on any box I know of.  A given process is limited in how many
> descriptors it can have open at once.  I don't know of any that will allow
> anywhere near 50k.  Somewhere in the 1-2000 range would be more typical.
> The 1500 you report is not at all surprising.
>
> You might try creating a bunch of child processes with os.system() or
> something of that ilk.  Create 50 processes and have each one open 1000
> sockets.
>
> The next thing you have to worry about is whether the OS can handle 50k
> file descriptors open per-system.  Or 50k sockets, or TCP connections.  I
> wouldn't be too surprised if many systems couldn't.  The address space 
> (TCP
> port numbers) is 16-bit (unsigned), or about 65k, but you may well run 
> into
> some other system limit long before you exhaust the theoretically 
> available
> ports.
>
> Something like Scapy, recommended by others, may indeed be able to 
> generate
> all those SYN packets you want, but that doesn't mean you'll get all the
> open connections you seek.  You send a SYN packet to the remote host, and
> it sends back a SYN/ACK.  The local kernel now sees a SYN/ACK packet for a
> port it doesn't know about.  I'm not sure what the RFCs say about that, 
> but
> I wouldn't be surprised if the kernel ends up sending a RST or maybe a FIN
> or something like that.  The kernel owns the ports; it's not nice to try
> and mess with them on your own. 




From castironpi at gmail.com  Sun May 11 00:27:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 21:27:18 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com> 
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com> 
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com> 
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
Message-ID: <e45978fd-7d18-411d-bcaa-145207c6a683@59g2000hsb.googlegroups.com>

On May 10, 10:05?pm, hdante <hda... at gmail.com> wrote:
> On May 10, 8:22?pm, notbob <not... at nothome.com> wrote:
>
> > On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > ? ?So... in short, you'd need to have been reading a tutorial specific
> > > to "shell" scripting...
>
> > I have been. ?I'm also trying to learn bash shell scripting, not to mention
> > sed/awk, php, etc. ?I should have started this a long time ago, but I'm lazy
>
> ?Throw all of this away and learn just python. That will be much
> simpler for you.
>
> > and, like I said, I'm not particularly fond of coding. ?Yes, I have learned
> > basic C and basic , but never beyond intro. ?Now, I'm doing it because I'm a
>
> ?Forget basic and learn python. Later you can learn C.

Fiscally speaking, C and Python may well be just as economical.  So
long as you've spent time learning a computer language, hold you can
get your needs met*.

* Even if money isn't a measure of value, a true measure of value, or
measure of true value.

In light of the actual writing of Python, if you make it, like to.

In sight of competitors, argue that Python is at least a locus, node,
nodepoint, or to-central of something about free and software.

Hold that Python is an end in itself, and/or that writing it is, and/
or is writing an implementation.

(Can you talk about languages like they're people?)

Distinguish further between languages, programs, libraries, and the
standards.

Then evaluate Python for population assortment characteristics, such
as population, overcrowding, undercrowding, and various sense
criteria.

In the Windows world, we are asking, how many keystrokes per thought,
mouse motions per error, and cross.

If your boss sucks but Python rules, it remains unclear that either is
any better.  It is not clear that Python has a will, or computers
have.

If they have minds, whether absent will or not, perhaps it wouldn't
pay to like it too much.  What diversity can you find on a newsgroup?



>
>
>
> > geezer and I figure my brain needs more exercise then just blabbing on
> > usenet. ?Besides, I've been cruising while using linux for too long and have
> > remained low end intermediate. ?Time to get serious. ?Pass the cheat sheets!
>
> > nb- Hide quoted text -
>
> - Show quoted text -



From bruno.desthuilliers at gmail.com  Fri May 23 17:36:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 14:36:37 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>

On 23 mai, 23:14, nayden <nay... at gmail.com> wrote:
> and then I try to restore the object with the following code
>
> def success(rv):
>     print "success"
>     str =  cStringIO.StringIO(libpq.PgUnQuoteBytea(rv[0][0]))
>     i = cPickle.load(str)
>     i.toString()
>
> the execution fails just after the print statement, and I am not quite
> sure why is that.

Please reread the doc for pickle.dump,  pickle.dumps, pickle.load and
pickle.loads.  You just don't need StringIO here, just use the 's
versions of the functions.

> I would love to find out what people are using when they need to do
> something similar
> perhaps I am trying to do it the perl way, while there is an elegant
> python solution.

I don't know if you'd label it 'elegant', but as far as I'm concerned,
storing serialized objects as blobs in a relational database is mostly
non-sense. If I use a relational database, it's because it is a
*relational* database. If you want an OODB, then we have the ZODB,
Durus and a couple others.




From gagsl-py2 at yahoo.com.ar  Thu May 15 22:31:55 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 23:31:55 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
	<1e5bcefd0805151850r899c923m3da14c089973beab@mail.gmail.com>
Message-ID: <op.ua76nhmnx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 22:50:21 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> Hmm.. I re-read your message and I think I'm approaching testing in a
> mechanical way, indeed.
>
> You're right, my test is kind of pointless, given the objective of the
> function, which is to generate a differnt directory name each time it is
> called. I also found it kind of strange to repeat the implementation in  
> the
> test method. However, something keeps telling me that it still has to be
> "unit" tested, sonehow (the algorith used).

Again, that depends on the actual purpose of such function. If all you  
want is a unique directory name, you might consider the set of users and  
time as "hints" only; a completely random directory name would be OK. You  
might not even require that the same input generates always the same  
output. The less restrictions you put on the required behavior, the  
easiest is to replace the current implementation. Of course, if you *do*  
require some invariant or some condition, you have to test for it.

-- 
Gabriel Genellina



From mde at MicahElliott.com  Thu May  1 14:17:47 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Thu, 01 May 2008 11:17:47 -0700
Subject: Best way to store config or preferences in a multi-platform	way.
In-Reply-To: <790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <20080501181747.GA6567@micahelliott.com>

On 2008-05-01 Carl Banks wrote:

> If you don't intend to write a GUI to do that, write a simple
> text file parser (if the options are simple), use ConfigParser,
> or use a Python file that you exec.

INI is great for so many things.  It is also extremely
commonplace, regardless of platform.  The biggest challenge might
be choosing which one to adopt:

    http://wiki.python.org/moin/ConfigParserShootout

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com
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From space.captain.face at gmail.com  Thu May 29 04:23:45 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 01:23:45 -0700 (PDT)
Subject: Finding file details...
Message-ID: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>

I've been trying to figure out how to find the details of files
(specifically music for now) for a little sorting script I'm making,
My aim is to get details on the artist, album, and genre for mp3 and
wma files (possibly more in the future). My closest match was when I
stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
to help (and most of it went over my head). Is there any module I can
use to find this sort of data? I'm trying to not make it specialised
in music, because I may want to extend this to picture, movie, text
etc. files in the future. Any ideas how I could go about this?


From cmpython at gmail.com  Sat May 10 03:58:12 2008
From: cmpython at gmail.com (CM)
Date: Sat, 10 May 2008 00:58:12 -0700 (PDT)
Subject: firefox add-on to grab python code handily?
Message-ID: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>

I encounter a fair number of small Python scripts online, and usually
try them out by copying them to the clipboard, pasting into Notepad,
saving them, and either running them directly or opening them in
IDLE.

And so I was wondering if anyone knew of an extension/add-on/script
for Firefox which would allow a way to do something like this:

user highlights Python code on a webpage
right clicks
selects a menu item, "Save as Python code"
FF pops up a filename dialog or popup for filename
(and, though I don't know if this is possible, runs Python code)

Not an important thing by any means, but it would be a nice
convenience.
I know there are similar add-ons in FF for grabbing highlighted text
and
saving, but they are not good, as they don't seem to preserve line
breaks
properly or append the .py extension, etc.  I've Googled for this and
so far
it seems it doesn't exist.  Anyone know?




From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 04:12:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 10:12:45 +0200
Subject: default object comparison considered harmful?
In-Reply-To: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <482d41eb$0$23030$426a74cc@news.free.fr>

A.T.Hofkamp a ?crit :
> Hello all,
> 
> Yesterday we found the cause of a bug that has caused problems for a long time.
> It appeared to be the following:
> 
> class A(object):
>     pass
> 
> print min(1.0, A())
> 
> which is accepted by Python even though the A() object is not numerical in
> nature.
> 
> The cause of this behavior seems to be the compare operation of the object
> class.
> 
> 
> Is there a way to disable this behavior in Python (other than deriving a new
> 'object-like' class that doesn't do comparisons?)

Other than implementing a custom __cmp__ function ? Not AFAIK. FWIW, you 
don't necessarily need to fiddle with inheritance - you can also 
monkeypatch your classes (nb : for new-style objects, you cannot 
monkeypatch __magic__ methods on a per-object basis).

Also, IIRC, this behaviour has changed in Python 3.



From aaron.watters at gmail.com  Fri May  2 16:05:43 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Fri, 2 May 2008 13:05:43 -0700 (PDT)
Subject: Why is None <= 0
References: <fut7q3$kup$1@newsreader2.utanet.at>
	<481226f9$0$20866$9b622d9e@news.freenet.de> 
	<slrng14t4k.vg2.jon+usenet@snowy.squish.net>
Message-ID: <769285d3-d774-4690-9062-d03c8fb1a93f@24g2000hsh.googlegroups.com>

On Apr 25, 8:17 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> On 2008-04-25, Martin v. L?wis <mar... at v.loewis.de> wrote:
>
> > None is smaller than anything.
>
> According to Tim Peters, this is not true.
>
> See http://bugs.python.org/issue1673405

This is unfortunate.  I would advocate
something like ordering "incomparable objects"
by the name of their type or something
similar.

When building indexing structures it can be
very nice to be able to construct a list of
heterogeneous tuples and sort them without getting
an exception.  Implementing this using L.sort(cmp) where
cmp is implemented in Python can result in
a significant speed penalty.

What's up with Tim Peters anyway?  I haven't
seen much from him for a while.
   -- Aaron Watters

===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=quote+tim+peters


From gandalf at shopzeus.com  Wed May 21 10:35:11 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 16:35:11 +0200
Subject: problem with import / namespace
In-Reply-To: <483427BF.6030805@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
Message-ID: <4834331F.2000606@shopzeus.com>


>
> When you try to import a module, python starts to search for it. The 
> was it does the search is very well defined. It mostly depends on the 
> current directory and sys.path. You can read more about this here:
"The was it" -> "The way it"
> - inside your app.py file either make sure that the current dir is 
> /app, or insert /app in the first place in sys.path
Example:

import os,sys
mydir = os.split(os.abspath(__file__)[0]
os.chdir(mydir) # Option 1 - chdir to dir. containing your app
sys.path.insert(0,mydir) # Option 2 - add to your sys.path

Good things to know:

- In Python, it is recommended not to use upper case module/package 
names. It is a convention. However, some 3rd party packages (like 
wxPython or PIL) break this rule.
- Obviously, you should not use numbers, reserved words for module or 
package names. The name should tell what is it for.
- It is good to know the standard library, and avoid overwriting names 
from the standard lib. For example, you can create your own 'os.py' 
module but it would be very silly.

I personally tend to use absolute package names for libraries that are 
not tied to a specific project but it does not need to be that way.

You can find many threads in python-list about how applications and 
packages should be constructed.

Best,

   Laszlo



From aahz at pythoncraft.com  Fri May 30 16:00:32 2008
From: aahz at pythoncraft.com (Aahz)
Date: 30 May 2008 13:00:32 -0700
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <g1pmd0$o9k$1@panix3.panix.com>

In article <b9201cbc-5e24-480f-ba55-44227b622c6d at c19g2000prf.googlegroups.com>,
 <allendowney at gmail.com> wrote:
>
>Anyway, I am posting to ask about the current status of new style
>classes.  I am planning to present only one style in the book, because
>the differences between them don't matter for anything I am doing in
>the book.

You've got a tough use-case.  When is your book supposed to be done?  To
what extent to you want to make your book work with 3.x?

Overall, I'm generally in favor of presenting both (I'm opposed to
new-style-only), but in your case it sounds like just new-style would be
better.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From terry.yinzhe at gmail.com  Fri May 16 19:44:00 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Fri, 16 May 2008 16:44:00 -0700 (PDT)
Subject: Get all the instances of one class
Message-ID: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>

Hi,

Is there a simple way to get all the instances of one class? I mean
without any additional change to the class.

br, Terry


From maxm at mxm.dk  Tue May 27 13:24:11 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 27 May 2008 19:24:11 +0200
Subject: New chairman
In-Reply-To: <a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <g1hg3r$orp$1@ger.gmane.org>

Sverker Nilsson skrev:
> I was talking about Guido van Rossum
> 
> The one who decides, so far when people agree

I have been using Python since the nineties. I cannot remember when I 
have had to rewrite old code because of changes in the language.

At the same time I have been feeling as if I was sitting in a time 
machine watching other languages whoosh by at breakneck speed.

Entire technologies have been developed to make programming as practical 
and easy as it has been in Python the entire time.

So I find it hard to see exactly what it is that Guido is doing wrong?

-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From eckhardt at satorlaser.com  Wed May 21 06:14:22 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Wed, 21 May 2008 12:14:22 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <099dg5-r6j.ln1@satorlaser.homedns.org>

boblatest at googlemail.com wrote:
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
> 
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly.

How about this (untested) code:

for re in (re1, re2, re3):
  match = re.match(line)
  if match:
    # use it

This requires that "use it" means the same for each regular expression
though...

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From krumblebunk at gmail.com  Tue May  6 11:29:59 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 08:29:59 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<fvptae$2ve$1@gemini.csx.cam.ac.uk>
Message-ID: <c7174f30-9ca4-48e6-a231-39503b67ead8@f24g2000prh.googlegroups.com>

Thanks all!!

kb.



From kirk at daycos.com  Fri May 30 14:53:55 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 13:53:55 -0500
Subject: Calling instance methods from a decorator
References: <87d4n3n1z7.fsf@internal.daycos.com>
	<6aasg8F35t0j9U1@mid.uni-berlin.de>
Message-ID: <871w3jmxmk.fsf@internal.daycos.com>

At 2008-05-30T17:40:17Z, "Diez B. Roggisch" <deets at nospam.web.de> writes:

> Of course you can get the self - just use the first paramter, because it
> *is* self. Self is just a parameter - nothing special.

If I blame it on being a long week, can I keep my geek card?
-- 
Kirk Strauser
The Day Companies


From mccredie at gmail.com  Thu May  1 14:52:48 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 1 May 2008 11:52:48 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <006ba21e-8510-4dd1-992c-3da3f7997bec@v26g2000prm.googlegroups.com>

On May 1, 4:37 am, Lance Gamet <la... at gamet.com> wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but
> I have a small amount of user specific data that I need to be stored like
> configuration or preferences for example, the list of databases that the
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry,
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability
> for the user to edit the file independently of the program is a good or
> bad thing.
>
> Thanks a lot.
> Lance

sqlite is a wonderful option, if the user doesn't need to directly
edit it.

Alternatively, you might consider just using python code. Something
like this:

[config_file.py]
class Config:
   optiona = 1
   optionb = 2
[/end file]

Then, in your code you can just:

>>> import imp
>>> m = imp.load_source("config_file", "./config_file.py") # use appropriate path (of course)
>>> m.Config.optiona
1
>>> m.Config.optionb
2

Like any other solution, this option has advantages and disadvantages,
but I think it is worth exploring. The class method in the above code
is just an example, choose whatever format is appropriate.

As for generating the contents of the file, tripple quoted strings and
`%r` are your friends.

Matt



From torriem at chem.byu.edu  Thu May  1 12:51:58 2008
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Thu, 01 May 2008 10:51:58 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <4819F4A5.4010302@gmail.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
	<4819F4A5.4010302@gmail.com>
Message-ID: <4819F52E.8080100@chem.byu.edu>

Michael Torrie wrote:
> The second example, x = Integer.fromString('5') demonstrates a huge
> weakness in Java.  

Ahem.  Javascript.  Sorry.

-- 
Michael Torrie
Assistant CSR, System Administrator
Chemistry and Biochemistry Department
Brigham Young University
Provo, UT 84602
+1.801.422.5771

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?



From gherron at islandtraining.com  Fri May 16 17:33:28 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 14:33:28 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
References: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>
Message-ID: <482DFDA8.3040305@islandtraining.com>

Dan Upton wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time.  If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated.  For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated).  Roughly:
>
> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
>
> The problem:
>
> RuntimeError: dictionary changed size during iteration
>
> So, the question is: is there a way around this?  

Yes.  Create a list of keys, and loop through it:
pids = procs_dict.keys()
for pid in pids:
    if  procs_dict[pid].poll() != None
     # do the counter updates
     del procs_dict[pid]

Then the diction delete operation won't trip up the loop and its 
internal counter.



OR:  Create a list of things to delete while you are in the loop, and do 
the delete afterwards

deleteme = []
for pid in procs_dict:
  if procs_dict[pid].poll() != None
     # do the counter updates
     deleteme.append(pid)

for pid in deleteme:
   del procs_dict[pid]



OR: shred and rebuild the dictionary each time:

new_dict = {}
for pid,value in procs_dict.items():
   if value.poll() != None:
     # do the counter updates
      pass
    else:
      new_dict[pid] = value

procs_dict = new_dict



Gary Herron

  
> I know that I can
> just /not/ delete from the dictionary and keep polling each time
> around, but that seems sloppy and like it could keep lots of memory
> around that I don't need, since presumably the dictionary holding a
> reference to the Popen object means the garbage collector could never
> reclaim it.  Is the only reasonable solution to do something like
> append all of those pids to a list, and then after I've iterated over
> the dictionary, iterate over the list of pids to delete?
>
> (Also, from the implementation side, is there a reason the dictionary
> iterator can't deal with that?  If I was deleting from in front of the
> iterator, maybe, but since I'm deleting from behind it...)
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gagsl-py2 at yahoo.com.ar  Thu May  8 09:28:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 10:28:13 -0300
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
References: <fvut8a$b67$1@theodyn.ncf.ca>
Message-ID: <op.uat7pbp4x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:55:36 -0300, Colin J. Williams <cjw at ncf.ca> escribi?:

> The readme.txt has:
>
> All you need to do is open the workspace
> "pcbuild.sln" in Visual Studio,
> select the desired combination of
> configuration and platform and eventually
> build the solution. Unless you are going
> to debug a problem in the core or
> you are going to create an optimized
> build you want to select "Release" as
> configuration.
>
> Unfortunately, the Express Edition
> (Free) doesn't handle "solution" files.

Yes, it does. You get a warning saying that solution *folders* aren't supported; that just means that you won't see those 26 projects nicely grouped, only as a long list, that's all... Python builds fine with Visual C++ Express Edition.
Select Release, Win32 from the dropdown lists, press F7, and wait for compilation to complete...

-- 
Gabriel Genellina



From mal at egenix.com  Tue May 13 06:52:32 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 13 May 2008 12:52:32 +0200
Subject: Is there no single/uniform RDBMS access API module for Python
 ?
In-Reply-To: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
Message-ID: <482972F0.2090101@egenix.com>

On 2008-05-12 07:43, Banibrata Dutta wrote:
> Hi,
> 
> Again a noob question.
> 
> Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
> correct to conclude that there is no RDBMS agnostic, single/uniform DB
> access API for Python ?
> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> 
> How is the RDBMS change handled for solutions which need to work with
> different RDBMSs ??

Most Python database modules adhere to the Python Database API specification
(DB-API). The current version 2 is available in the PEP format as:

     http://www.python.org/dev/peps/pep-0249/

The spec was created and is maintained by the Python DB-SIG:

     http://www.python.org/community/sigs/

If you are looking for a generic Python database interface, then I'd
suggest you have a look at our mxODBC:

     http://www.egenix.com/products/python/mxODBC/

It works on all common Python platforms (e.g. Windows, Linux x86/x64,
Macs, Solaris, etc.) and provides the same API on these, so apart from
changing the ODBC driver configuration, you don't need to make any
major changes to your application if you want to switch from one
platform to another.

Note: mxODBC is a commercial add-on to our eGenix mx Base OSS
distribution. It's maintained by eGenix and has been around
since 1997.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 13 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From russblau at hotmail.com  Thu May 22 17:52:02 2008
From: russblau at hotmail.com (Russell Blau)
Date: Thu, 22 May 2008 17:52:02 -0400
Subject: How do I make a copy of my class object?
References: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>
Message-ID: <g14pu5$phf$1@ger.gmane.org>

"Marlin Rowley" <marlin_rowley at hotmail.com> wrote in message 
news:BAY135-W134E8CAB38A2ACB2F5933F9FC60 at phx.gbl...
> I have a class object which has the usual data members and functions.
> I'm trying to make a copy of this class (which includes wx.Bitmap objects)
> but deepcopy() doesn't seem to work.  How would I do this?

Are you trying to make a copy of the "class object" or of a class instance?

What error message are you getting when you call deepcopy() on this object?






From bronger at physik.rwth-aachen.de  Thu May  1 19:21:38 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 01:21:38 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru>
Message-ID: <874p9hvce5.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> [...]
>
> For me it looks more like an old-school/new-school thing than
> use-case thing. I may be wrong, but I see more and more new
> projects use things like reST and YAML/JSON and it feels like they
> are gradually replacing traditional old-school solutions.
>
> And I've got very strong impression that YAML is a the future of
> configuration files when Google released their App Engine.

In contrast to many other areas of software, configuration files
needn't be compatible with anything except the user's brain.  So
even if the rest of the world uses config format X, you can safely
stick with config format Y.

I mean, YAML is not really a complex thing, yet it was conceived not
before 2001.  The reason is that traditional config files do a good
job.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From sven.siegmund at gmail.com  Sun May 11 18:27:51 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:27:51 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
Message-ID: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>

Hello,

I am testing Python 3.0a5's handling of unicode strings. Since SPE is
not yet for Python 3.0, I have begun to write in IDLE 3.0a5.

I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
can:

#!/usr/bin/python
# -*- coding: utf-8 -*-

def na?tiSlovn?k(zdroj='slovn?k.txt'):
    soubor = open(zdroj, mode='r', encoding='utf_8')
    ??dky = soubor.readlines()
    for ??dek in ??dky:
        print(??dek, end='')

na?tiSlovn?k()
# End of source code

I have set up Default Source Encoding to UTF-8 in IDLE's general
configuration. Still, when I open that source code and try to run it,
IDLE complains about "invalid character in identifier" and highlights
"zdroj" red in the first line (sic!).

However, when I run the source code from command line (by "python
<filename>"), it gets executed well and does what it shall do.

I should probably add, that I have installed py3k:62932M, May 9 2008,
16:23:11 [MSC v.1500 32 bit (Intel)] on win32. I use Windows XP SP 3.

Is this a known bug if IDLE 3.0a5 which will be fixed in the final
release?

Greetings,

S.


From victorsubervi at gmail.com  Thu May  8 11:33:55 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 8 May 2008 10:33:55 -0500
Subject: Custom Classes?
In-Reply-To: <4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
Message-ID: <4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>

Okay, trying this again with everything working and no ValueError or any
other errors, here we go:

Load this code. Unless you use a similar login() script, you will want to
edit your own values into the user, passwd, db and host:

#!/usr/bin/python

import MySQLdb

import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()

pic = "pic1"
w = 20
x = 0
d = 6
y = 1

getpic = "getpic" + str(w) + ".py"
try:
  os.remove(getpic)
except:
  pass
code = """
#!/usr/local/bin/python
import cgitb; cgitb.enable()
import MySQLdb
import cgi
import sys,os
sys.path.append(os.getcwd())
from login import login
user, passwd, db, host = login()
form = cgi.FieldStorage()
picid = int(form["id"].value)
x = int(form["x"].value)
pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
pic = pics[x]
db = MySQLdb.connect(host, user, passwd, db)
cursor= db.cursor()
sql = "select %s from products where id='%s';" % (pic, str(picid))

cursor.execute(sql)
content = cursor.fetchall()[0][0].tostring()
cursor.close()
print 'Content-Type: image/jpeg'
print
print content
"""
script = open(getpic, "w")
script.write(code)
script.close()



and then surf to:
http://whatever.url/getpic20.py?id=6&x=1


Also, please re-send the link on how to post good questions to the list. I
cannot find it.
TIA,
Victor
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From jpthing at online.no  Thu May  8 04:05:36 2008
From: jpthing at online.no (John Thingstad)
Date: Thu, 08 May 2008 10:05:36 +0200
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<e04ba51f-30a0-44fa-aade-c2fb6c99f944@26g2000hsk.googlegroups.com>
Message-ID: <op.uatsrmq2ut4oq5@pandora.alfanett.no>

P? Thu, 08 May 2008 04:14:35 +0200, skrev Kyle McGivney  
<KyleMcG at gmail.com>:

>> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
>> lisp's keywords ?let?, is based on the English word ?let?. That word
>> is one of the English word with multitudes of meanings. If you look up
>> its definition in a dictionary, you'll see that it means many
>> disparate things. One of them, as in ?let's go?, has the meaning of
>> ?permit; to cause to; allow?. This meaning is rather vague from a
>> mathematical sense. Mathematica's choice of Module, Block, is based on
>> the idea that it builds a self-contained segment of code. (however,
>> the choice of Block as keyword here isn't perfect, since the word also
>> has meanings like ?obstruct; jam?)
>
> If the purpose of let is to introduce one or more variable bindings,
> then I don't see how changing to block or module would improve
> anything. I've always found it fairly intuitive to parse (let ((x
> 5)) ...) to "let x be five". Additionally, replacing let with the
> synonyms you provided would approximately yield "permit x to be five"
> or "allow x to be five". In my mind you have constructed an argument
> in favor of let here (obviously it's better than block, because
> nobody's going to come along and be confused about whether let will
> "obstruct" or "jam" them :)

How about bind?
  (bind ((v f (mod i)) ((a b) list) (t (rem q)))

1. is a multiple-value-bind
2. is a destructuring-bind
3. is a let

http://common-lisp.net/project/metabang-bind/

To me this is a example of where the ANSI group could have spent more time  
on naming.

--------------
John Thingstad


From deets at nospam.web.de  Sun May  4 12:38:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 18:38:42 +0200
Subject: Weird import problem
In-Reply-To: <fvkoer$2g7h$1@gwdu112.gwdg.de>
References: <fvkoer$2g7h$1@gwdu112.gwdg.de>
Message-ID: <68674mF2rjrt5U1@mid.uni-berlin.de>

Anton81 schrieb:
> I have a directory structure like
> 
> NS/dir1/file1.py
> NS/dir2/file2.py


This *must* be wrong or at least not the full directory listing - please 
read

http://docs.python.org/tut/node8.html

> if in the python shell I type
> 
> import NS.dir1.file1
> 
> it works, however typing
> 
> import NS.dir2.file2
> 
> fails with
> 
> ImportError: No module named dir2.file2
> 
> Any ideas what could go wrong?
> Directory permissions seem to be OK.

Missing __init__.py in the dir2?

Diez


From tarun.kap at gmail.com  Fri May  2 14:25:13 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 11:25:13 -0700 (PDT)
Subject: list.index crashes when the element is not found
Message-ID: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>

WHAT ?

This is crazy


From castironpi at gmail.com  Tue May 20 17:19:12 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 14:19:12 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1> 
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com> 
	<a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>
Message-ID: <111a4113-d453-4c2c-9997-0c27d8fcea8b@a32g2000prf.googlegroups.com>

On May 20, 11:49?am, s0s... at gmail.com wrote:
> On May 20, 9:04 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 20, 5:04 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> > > John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > > >>>> a = 'this is longer'
> > > >>>> b = 'this is longer'
> > > >>>> a == b
> > > > True
> > > >>>> a is b
> > > > False
>
> > > > In the above example, Python has created only one string called
> > > > 'hello' and both x and y reference it. However, 'this is longer' is
> > > > two completely different objects.
>
> > > That is true when run interactively, but the behaviour changes again if you
> > > run it as a script:
>
> > > C:\Temp>type t.py
> > > a = 'this is longer'
> > > b = 'this is longer'
> > > print a is b
>
> > > C:\Temp>t
> > > True
>
> > > In short, two equal strings may or may not be identical and any code which
> > > makes assumptions based on observed behaviour is broken. If you want to be
> > > able to test identity on strings safely then use the 'intern()' builtin to
> > > get repeatable behaviour.
>
> > > --
> > > Duncan Boothhttp://kupuguy.blogspot.com
>
> > There is no such thing as real true equals.
>
> That's quite some dark deep philosophy. Fortunately, computers are not
> as complicated as real life. I would argue that, programatically,
> there *is* such thing as "real true equals". I would also argue that
> that view is most certainly not shared by everyone.- Hide quoted text -
>
> - Show quoted text -

Mean as it sounds, bits are pigeonholes: 5+V or 0.  As such, computers
are able to simulate numerical identity, but, don't forget, all your
inputs are discretized (pigeonholed).

Symbolic (mathematical) identity (equality) is defined as a reflexive,
symmetric, transitive relation, and partitions its domain into
equivalence classes (membership in which is binary).  Symbols are
outside of cause.

Ma: Symbolic identity is a mathematical relation
Mb: Symbols are acausal
m: Matter is causal
C: Symbolic identity is not defined on matter.

Further, conclude computers are symbolic only.  Now, what can a hoard
of people do with some symbols?

But, I defer on the practical sense.


From amit.uttam at gmail.com  Fri May 16 20:12:10 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:12:10 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
	<LnoXj.10564$Xv3.10250@bignews4.bellsouth.net>
Message-ID: <c5f3f298-5aba-426b-a9fe-cb0274fe307c@1g2000prg.googlegroups.com>

On May 16, 4:02 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> amit.ut... at gmail.com wrote:
> > Hey there,
>
> > I have a simple question about python print statement. Take the
> > following code snippet for example...
>
> > 1 print "-#- executing: %s" % section,
> > 2 tests[section] = test.testcase(name=config.get(section,'name'))
> > 3 tests[section].runTest()
> > 4 printStatus(tests[section])
>
> > Now the problem is that line 1 does not get printed until line 4. What
> > I thought would happen is that line 1 gets executed and the user sees
> > that the statement that the test case is executing. Then after the
> > test case executes a "PASS" or "FAIL" appears on the same line as the
> > "-#- executing: 0053" statement.
>
> > e.g.
> > -#- executing: 0053     FAIL
>
> > Some tests take a long time to finish thus the screen is blank until
> > the entire test finishes and the above statement is outputted.
>
> > Thanks for any help.
>
> 'print' sends its output to sys.stdout, which is buffered, and may not be
> displayed immediately (because it's held in the buffer).  To force the output to
> be displayed, use flush():
>
>    print "-#- executing: %s" % section,
>    sys.stdout.flush()
>    ...tests here...
>
> Hope this helps!
>
> --Hans

Thanks a lot!

This worked beautifully!


From python at bdurham.com  Wed May 21 10:32:08 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 21 May 2008 10:32:08 -0400
Subject: Publish a program
In-Reply-To: <48342434_2@news.tm.net.my>
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
Message-ID: <1211380328.14783.1254358753@webmail.messagingengine.com>

> appreciate somebody to join and put new views on this project

Send us a link to one of the sites with your code, eg.
http://python.pastebin.com

Malcolm


From castironpi at gmail.com  Fri May 16 18:36:47 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:36:47 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com> 
	<e7b9fdb8-5b15-49aa-a6ea-b27a3ee550a2@27g2000hsf.googlegroups.com>
Message-ID: <d21c1d04-bdc3-47cb-a224-d67adf38dc8e@l64g2000hse.googlegroups.com>

On May 16, 5:19?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:29?pm, "bruno.desthuilli... at gmail.com"
>
>
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
>
> > > On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > > > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > > > i extract info from one file and put it into a dictionary.
> > > > > i want to save that dictionary for later use, how do i do that?
> > > > > might save a list of dictionaries or a list of classobjects too if
> > > > > there is any difference.
>
> > > > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > > > ...
> > > > Jay Graves
>
> > > pickle.dumps(mg)
> > > pickle.load(mg)
>
> > > 'dict' object has no attribute 'readline'
> > > dumps load(well i dont know but i get no complaint but running load
> > > generates that error)
>
> > What about *READING THAT FUCKING MANUAL* ?
>
> >http://docs.python.org/lib/node316.html
> > """
> > dump(obj, file[, protocol])
> > ? ? Write a pickled representation of obj to the open file object
> > file. This is equivalent to Pickler(file, protocol).dump(obj).
>
> > ? ? If the protocol parameter is omitted, protocol 0 is used. If
> > protocol is specified as a negative value or HIGHEST_PROTOCOL, the
> > highest protocol version will be used.
>
> > ? ? Changed in version 2.3: Introduced the protocol parameter.
>
> > ? ? file must have a write() method that accepts a single string
> > argument. It can thus be a file object opened for writing, a StringIO
> > object, or any other custom object that meets this interface.
>
> > load(file)
> > ? ? Read a string from the open file object file and interpret it as a
> > pickle data stream, reconstructing and returning the original object
> > hierarchy. This is equivalent to Unpickler(file).load().
>
> > ? ? file must have two methods, a read() method that takes an integer
> > argument, and a readline() method that requires no arguments. Both
> > methods should return a string. Thus file can be a file object opened
> > for reading, a StringIO object, or any other custom object that meets
> > this interface.
>
> > ? ? This function automatically determines whether the data stream was
> > written in binary mode or not.
> > """
>
> > Example use:
>
> > >>> d = dict(a=1, b=2)
> > >>> f = open("mydict.dat", "w")
> > >>> pickle.dump(d, f)
> > >>> f.close()
> > >>> f = open("mydict.dat")
> > >>> d2 = pickle.load(f)
> > >>> f.close()
> > >>> d2 == d
> > True
> > >>> d2
> > {'a': 1, 'b': 2}
>
> > Now : it's not the first time - in a couple days - that you ask a
> > question that you wouldn't have asked if you had taken a couple
> > minutes doing the tutorial and/or reading the doc. This newsgroup is
> > *very* tolerant (in most other places on usenet, you would have get a
> > raw RTFM on the first question, and a PLONK on the second), but there
> > are still limits, and as far as I'm concerned you're not far from
> > them. So do yourself and the world a favour, read this:http://catb.org/~esr/faqs/smart-questions.html
>
> > and then this:http://docs.python.org/tut/tut.html
>
> > and next time someone points you to a specific module, have mercy and
> > *read* the doc before posting.
>
> > As far as I'm concerned, I won't anwser any of your questions unless
> > it's obvious that you have followed these advices (but then I'll be
> > happy to help if I can).- Hide quoted text -
>
> > - Show quoted text -
>
> There is 'shelve'. ?It's just that you have to re-update each entry
> when you modify, so it's just similarity you'd be saving.- Hide quoted text -
>
> - Show quoted text -

Now a shelf of filenames could be valuable.


From n00m at narod.ru  Mon May  5 10:58:26 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 07:58:26 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
	<fvmov5$o4i$00$1@news.t-online.com>
	<95445d33-218f-42de-9412-067229c20830@d45g2000hsc.googlegroups.com>
Message-ID: <8f56fd78-05fa-481a-982e-feb03d66a52e@c65g2000hsa.googlegroups.com>

it can be done like this:

            osql=popen2.popen2('osql -E -S(local) -dpubs -c"GO" -n -
w800')
            osql[1].write(query+'\nGO\n')
            osql[1].close()
            res=osql[0].readlines()
            osql[0].close()
            res=join(res,'')

btw, is it necessarily to close() osql[1] in order to get res?
without close() the script seems is waiting for smth.
I'd like to get "res" in a loop:
write()
read()
write()
read()
...
is it possible?


From pataphor at gmail.com  Tue May 20 09:48:02 2008
From: pataphor at gmail.com (pataphor)
Date: Tue, 20 May 2008 15:48:02 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
Message-ID: <20080520154802.4b5df647@hyperspace>

On Tue, 20 May 2008 06:12:01 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> Well, ok. Like I said, I never _took_ the position that it _should_
> be a list of lists, I just said I didn't see the advantage to using
> a single list.

I'm now thinking about a list of lists containing single element lists.

def test():
    n = 3
    R = range(n)
    M = [[[i+j*n] for i in R] for j in R]
    for L in M:
        print L
    row2 = M[1]
    print
    print row2
    col3 = [L[2] for L in M]
    print col3
    col3[1][0]=9

print col3
    print row2
    print
    for L in M:
        print L
        
if __name__=='__main__':
        test()

The idea is to use a single element list as kind of storage facility.
That enables me to copy a column, then change something in that column
and make the change turn up in the matrix and even in a previously made
copy of a row that shared the specific element.
 
> Today's little joke: Long ago I would have solved
> this by storing the data as a list of rows and _also_
> a list of columns, updating each one any time the
> other changed. Just goes to show you things
> could always be worse...

Well have I ever ... I only thought about this last week and I
actually thought it was a *good* idea.  I only gave up on it because
now I would have to keep  track of how far the two views are out of
sync, because some operation could use data that was modified by an
other view. Zipstar transposition is very handy for syncing, but it is
also very expensive. But probably not for you.

> Expressing interest is a big mistake...

How so? ;-)
 
> Sometime soon a thread will appear titled something
> like "indexed attributes" with a stripped-down but
> functional example of what I have in mind for Matrix

I can't wait! Keep up the good work.

P.



From rustompmody at gmail.com  Mon May 19 06:52:25 2008
From: rustompmody at gmail.com (Rustom Mody)
Date: Mon, 19 May 2008 16:22:25 +0530
Subject: pickle internals
Message-ID: <f46c52560805190352ycb62d5dtdad84d55da81bf9d@mail.gmail.com>

I am trying to understand pickle internals.
This involves:
-- the algorithm(s) used for traversal arbitrary structures
-- the pickle format
-- the use if any of introspection

I'll be thankful for any pointers

PS Should this question be put on some other list?/
-------------- next part --------------
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From deets at nospam.web.de  Tue May  6 05:10:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 11:10:34 +0200
Subject: read line
References: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
Message-ID: <68all5F2sj3e0U1@mid.uni-berlin.de>

moustafa.elmihy at gmail.com wrote:

> hi every body,
> 
> I'm a new python user and I'm making a program to run useing Abaqus
> and there is something I can't do,
> 
> if i have a text file that has a line like this " 10   20  30     40
> 50" and I wana do the coding to put every number of these like 10 or
> 20 in a separate variable .. any suggestions ??

Look up on the file-objects in the documentation, as well as string-methods
such as split and the int-function.

Diez


From n00m at narod.ru  Mon May  5 05:25:15 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 02:25:15 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
Message-ID: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>

os:windows
ml = 'line1 \n line2 \n line3 \n'
exec('some.exe "' + ml + '"')

and some.exe get only 'line1'...


From pydecker at gmail.com  Mon May 12 10:40:26 2008
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 12 May 2008 09:40:26 -0500
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <ca55a9900805120740k1532e5aep968638c3e3d8b3a5@mail.gmail.com>

On Mon, May 12, 2008 at 1:45 AM, Banibrata Dutta
<banibrata.dutta at gmail.com> wrote:

> > >  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is
> it correct to conclude that there is no RDBMS agnostic, single/uniform DB
> access API for Python ?
> > > Something in the lines of JDBC for Java, DBD for Perl etc. ?
> > >  How is the RDBMS change handled for solutions which need to work with
> different RDBMSs ??
> > >
> >
> > http://www.python.org/dev/peps/pep-0249/
> >
>
> That appears to be only an API specification. Are there any implementations
> of that ?

You might want to take a look at Dabo (http://dabodev.com). They have
a backend-agnostic interface for working with different databases. I
don't do database apps myself, so I can't comment on how well it
works, but based on the comments of others on the Dabo email lists, it
seems as though it works well enough.

-- 

# p.d.


From joe.p.cool at googlemail.com  Thu May  8 17:10:57 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Thu, 8 May 2008 14:10:57 -0700 (PDT)
Subject: Python GUIs and custom controls
Message-ID: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>

So far I have a little experience with Tkinter and wxPython. I wonder
which of the numerous Python GUI kits would be the best choice for a
multi platform application that makes heavy use of custom controls, 3D
views and the like? Thanks in advance for your hints and advice.

Joe


From gabriel.rossetti at arimaz.com  Mon May 26 06:14:55 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 12:14:55 +0200
Subject: b64encode and unicode problem
Message-ID: <483A8D9F.3080104@arimaz.com>

Hello everyone,

I am trying to encode a string using b4encode and I get the following 
error :

 >>> b64encode(u"Salut Pierre, comment ?a va?")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
    encoded = binascii.b2a_base64(s)[:-1]
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
position 22: ordinal not in range(128)

If I remove the "u" infront of the string, it works. The problem is that 
I in my program, the string is given to me un unicode/utf-8. I tried 
several things, but I still get it, How can I get it to work, anybody 
have any idea?

Thanks,
Gabriel


From http  Sun May 25 19:35:23 2008
From: http (Paul Rubin)
Date: 25 May 2008 16:35:23 -0700
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
Message-ID: <7xskw69cuc.fsf@ruckus.brouhaha.com>

miller.paul.w at gmail.com writes:
> Is there any place outside the actual C source for Python that has
> information about the performance of Python's built-in operations?

Really, just the source code and the general culture.  It's not in the
docs; that would be a pretty rare thing.

> For example, I'd *expect* list.append to be O(1), and I hope that
> list[i] is O(1), but I don't really know that for sure, since it
> would depend a lot on the internal implementation.

list[i] is O(1).  list.append is amortized O(1) but on some calls can
take much longer.  Basically list.append preallocates some extra space
for further appends but when you use up the extra space there is some
copying.  

> I'm really only asking this for curiosity's sake --- more as a
> reasonable, non-trollish version of the "Python is slow" post than
> anything. :-)  I've never really had any problems with the performance
> of Python code that I couldn't solve by either changing my algorithm
> or, if all else has truly failed, rewriting in C or Pyrex.

"You can fix your Python program's performance problems by rewriting
it in C" is not that convincing an answer to a concern that Python is
slow ;-).


From __peter__ at web.de  Mon May  5 06:53:26 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 05 May 2008 12:53:26 +0200
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <fvmov5$o4i$00$1@news.t-online.com>

n00m wrote:

> os:windows
> ml = 'line1 \n line2 \n line3 \n'
> exec('some.exe "' + ml + '"')
> 
> and some.exe get only 'line1'...

My crystall ball says you want

subprocess.call(["some.exe", ml])

exec is a python statement that executes python code.

Peter


From castironpi at gmail.com  Tue May 13 10:23:01 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:23:01 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<6c34f3a3-88fa-4519-b624-34a4589d2424@c65g2000hsa.googlegroups.com>
Message-ID: <3b6ac749-be8a-4d7d-91eb-d357554c6a24@b1g2000hsg.googlegroups.com>

On May 13, 9:01?am, castiro... at gmail.com wrote:
> On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
>
>
> > Any programming that helps you solve a problem is fun and
> > recreational. At least, that's how I look at it. I suppose it really
> > depends on why you're doing it, what your objective is, etc. But I'd
> > say, why not?
>
> > Tron! That's one I haven't seen in awhile. I'll have to take a mental
> > note to rent the movie again someday. I always thought a game based on
> > the movie hackers would be cool. Actually not based on the movie
> > itself, but on that 3D computer world they kept breaking into. Ah man,
> > it's so funny looking back on that film. Gibson, that's what they
> > called it. It was like a 3D database. That in itself wouldn't make a
> > very good game, but I suppose one could easily be created around that
> > idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> > trapped in this 80's looking 3D world that has access to all the
> > world's information. More stuff could be thrown in to make it more
> > interesting. And of course, there would have to be hidden references
> > or parodies to whatever movies inspired it.
>
> > Good luck with your project
>
> > Sincerely,
> > Joshua
>
> > On May 13, 9:02?am, castiro... at gmail.com wrote:
>
> > > Hi all.
>
> > > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > > Now to repeat the subject line. ?I'm stuck in Python.
>
> > > Now that was fun. ?I will also try to enumerate simple screen savers
> > > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > > "overunity", such that one person can't be at liberty to live, which
> > > in some technical political arenas would be an "anarchy", but there
> > > are sufficiently many of those that I will too.
>
> > > Does anyone want such a list, or if not, is it at least fun and
> > > recreational to make it? ?The dollar would come along the lines of
> > > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > > and peaceable. ?(As the above would show, you would be free to
> > > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > > Guido getting his fair share? ?I am prepared to share with him.)
> > > Check in his name.
>
> > > I want to try to ally with other programmers and make cool games, like
> > > Tron, that one party can make games for on a console, such as live
> > > obstacles, incl. tear-down, and certain people have to play from time
> > > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > > of time. ?Very summer.
>
> > > Resemblances would include Dungeons & Dragons with multi-host, or
> > > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > > attractive (duh). ?As for voice, it's not clear it's the most
> > > entertaining, but I just don't have a mic.
>
> > > However, forseeing, I return with sailing, but that's in 3-space and
> > > not even in code, as though we'd construct the Royal Navy and battle.
> > > But I think we can keep it well.
>
> > > Thing is, someone has to play it to keep a synch (keep from falling),
> > > and tap-outs would have to live.
>
> > > Side note: In political theory, this is known as the problem of
> > > nominating a successor. ?Would it stay afloat, even for long enough to
> > > make it worth the negatives, yes which do include tear-down and fall,
> > > invasion of privacy, and rights infrigement?
>
> > > I code in Python (get the callbacks), but configurable servers could
> > > spread the work out, using relays to put each person on each's own
> > > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > > c-l-py is the appropriate place to start such a thing, both and ask if
> > > it's been done before.- Hide quoted text -
>
> > - Show quoted text -
>
> My bot just tries to take control and lead. ?(The bot that I'm
> writing!) ?However, it is amusingly unsuccessful. ?We see in lines, so
> the game would be pretty primitive, but I'm not sure that everything
> else isn't merely too exciting, such that Tron wouldn't be monkey-in-
> the-middle, or king of the hill, of fun. ?I'm just not on a hill, so
> someone else would have to try to play it with me online!- Hide quoted text -
>
> - Show quoted text -

But, since, I'm just Tron, I will try short and repeated attempts to
sophisticate, at quantifiable levels, as I would be more than one.


From dullrich at sprynet.com  Tue May 20 11:40:17 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 10:40:17 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
Message-ID: <dullrich-C762B6.10401720052008@text.giganews.com>

In article <20080520154802.4b5df647 at hyperspace>,
 pataphor <pataphor at gmail.com> wrote:

> On Tue, 20 May 2008 06:12:01 -0500
> David C. Ullrich <dullrich at sprynet.com> wrote:
> 
> > Well, ok. Like I said, I never _took_ the position that it _should_
> > be a list of lists, I just said I didn't see the advantage to using
> > a single list.
> 
> I'm now thinking about a list of lists containing single element lists.
> 
> def test():
>     n = 3
>     R = range(n)
>     M = [[[i+j*n] for i in R] for j in R]
>     for L in M:
>         print L
>     row2 = M[1]
>     print
>     print row2
>     col3 = [L[2] for L in M]
>     print col3
>     col3[1][0]=9
> 
> print col3
>     print row2
>     print
>     for L in M:
>         print L
>         
> if __name__=='__main__':
>         test()
> 
> The idea is to use a single element list as kind of storage facility.
> That enables me to copy a column, then change something in that column
> and make the change turn up in the matrix and even in a previously made
> copy of a row that shared the specific element.
>  
> > Today's little joke: Long ago I would have solved
> > this by storing the data as a list of rows and _also_
> > a list of columns, updating each one any time the
> > other changed. Just goes to show you things
> > could always be worse...
> 
> Well have I ever ... I only thought about this last week and I
> actually thought it was a *good* idea. 

Sorry. If you really want to do this you could keep things
in sync automatically by writing the appropriate __setitem__
and resolving never to modify the data except through that...

def whatever.__setitem__(self, (row,col), value):
  self.rows[row][col] = value
  self.cols[col][row] = value

Seems to me like an, um, "untenable" waste of space. And you'd
need to be certain to never set anything except through
self[row,col]; as far as I can see anything like setrow()
would be a loop "for col in range(width): self[row,col] =".

Hmm. You could keep the data in some object that encapsulates
the two double lists and use some fancy feature (__getattribute__?)
to make certain that the only possible access to the data
was through __getitem__...

> I only gave up on it because
> now I would have to keep  track of how far the two views are out of
> sync, because some operation could use data that was modified by an
> other view. Zipstar transposition is very handy for syncing, but it is
> also very expensive. But probably not for you.
> 
> > Expressing interest is a big mistake...
> 
> How so? ;-)
>  
> > Sometime soon a thread will appear titled something
> > like "indexed attributes" with a stripped-down but
> > functional example of what I have in mind for Matrix
> 
> I can't wait! Keep up the good work.
> 
> P.

-- 
David C. Ullrich


From castironpi at gmail.com  Tue May 13 11:35:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:35:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <7803a03b-c626-4573-b859-6611229cb622@a70g2000hsh.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

Flaming Thunder, the lightning one, looked like [ 255, 210, 255 ], but
the next thing I thought was -40 on green.


From bborcic at gmail.com  Tue May  6 06:43:12 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 06 May 2008 12:43:12 +0200
Subject: parameters to lambda's executed at run time.
In-Reply-To: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
Message-ID: <48203672$1_4@news.bluewin.ch>

One way :

 >>> from functools import partial
 >>> def func(item) : print item

 >>> llist = [partial(func,item) for item in range(5)]
 >>> for thing in llist : thing()

0
1
2
3
4


wyleu wrote:
> I'm trying to supply parameters to a function that is called at a
> later time as in the code below:
> 
> llist = []
> 
> for item in range(5):
>     llist.append(lambda: func(item))
> 
> def func(item):
>     print item
> 
> for thing in llist:
>     thing()
> 
> which produces the result
> 
> IDLE 1.2.1
>>>> ================================ RESTART ================================
>>>>
> <function <lambda> at 0xb716356c>
> <function <lambda> at 0xb71635a4>
> <function <lambda> at 0xb71635dc>
> <function <lambda> at 0xb7163614>
> <function <lambda> at 0xb716364c>
>>>> ================================ RESTART ================================
>>>>
> 4
> 4
> 4
> 4
> 4
> 
> How can one allocate a different parameter to each instance of the
> function rather than all of them getting the final value of the loop?
> 


From mishok13 at gmail.com  Tue May 27 11:13:02 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 18:13:02 +0300
Subject: decorators when?
In-Reply-To: <as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
Message-ID: <192840a00805270813i3bfc6fccja42034f87eac5634@mail.gmail.com>

2008/5/27 David C. Ullrich <dullrich at sprynet.com>:
> On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
> <deets at nospam.web.de> wrote:
>
>>David C. Ullrich wrote:
>>
>>> What version added decorators (using the
>>> @decorator syntax)?
>>>
>>> (Is there a general way I could have found out the answer myself?)
>>>
>>> Is there a somthing such that "from __future__ import something"
>>> will make decorators work in 2.5.2?
>>
>>They do work. They were introduced in python2.4
>
> That's more or less what I thought, but...
>
> Oh. Never mind the details, let's just say that having 2.3 and
> 2.5 installed on the same machine can lead to confusion
> about exactly which one you're running a script under.
> Duh.
>
> Sorry. Thanks. I don't suppose that decorators are available
> from __future__ somehow in 2.3?
>

Nope, they don't.
Anyway, decorators are just a syntactic sugar, why would you need this
feature in 2.3?
>
>>Diez
>
> David C. Ullrich
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From zerty.david at gmail.com  Thu May  8 21:47:59 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 8 May 2008 22:47:59 -0300
Subject: Weird bug with an integer
In-Reply-To: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
References: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
Message-ID: <5dc598e30805081847n5e2ed2a5jeb8e8da6263dd11c@mail.gmail.com>

Ps:
When I go to shell and type:rowN = int(0)

rows = [["1223", "11/23/08", "Purchase", "To be shipped", "Gallery Name",
"Art Title[22 of 300]", "$10,000"],#1st row
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"],#2nd row
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"],#etc, obviouslly these info will
be fetched from the db
                ["1223", "11/23/08", "Purchase", "To be shipped", "Gallery
Name", "Art Title[22 of 300]", "$10,000"]
                ]
for row in rows:

    colN = int(0)
    for col in row:
        print str(colN) + "," + str(rowN) + " - " + col


It works and print everything correctly Oo
On Thu, May 8, 2008 at 10:44 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Look this slice of code:
>
> rowN = int(0)
>         for row in rows:
>             success = self.resultGrid.AppendRows();
>             colN = int(0)
>             for col in row:
>                 self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
> - 1,colN,isReadOnly = True)
>                 print rowN
>                 self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>
> I am getting this output:
> 0
> 0
> 0
> 0
> 0
> 0
> 0
> (1,)
> Traceback (most recent call last):
>      in populateGrid
>     self.resultGrid.SetCellValue(int(rowN),int(colN),col)
> TypeError: int() argument must be a string or a number, not 'tuple'
>
>
> Why is this happening?
>
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From upton at virginia.edu  Fri May 16 14:54:31 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 14:54:31 -0400
Subject: morning in Python
In-Reply-To: <28kXj.142759$Er2.39732@bignews6.bellsouth.net>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
	<28kXj.142759$Er2.39732@bignews6.bellsouth.net>
Message-ID: <5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>

On Fri, May 16, 2008 at 2:12 PM, inhahe <inhahe at gmail.com> wrote:
>
> "George Sakkis" <george.sakkis at gmail.com> wrote in message
> news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
> On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
>> I'm not an expert in this but what does it mean to emphasize state? It
>> seems the opposite of that would be a) functional programming, and b)
>> passing parameters instead of using global or relatively local variables.
>> And maybe c) coroutines (generators as implemented in Python), although
>> perhaps coroutines could be said to emphasize state inasmuch as they go
>> out
>> of their way to capture, objectify and reuse it (Stackless' microthreads,
>> even moreso). And Python seems to be well-noted for implementing some
>> functional programming methodology, and as for passing parameters it's
>> just
>> as object-oriented as the rest of them.
>>
>> But as I said, I'm not an expert, so let me know if I've gone astray..
>>
>> > I have a proposition to ask you all: Python emphasizes state. Is it
>> > true?
>
> Please don't feed the bots.
>
> --
>
>
> I figured the question was interesting enough to warrant discussion whether
> it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.
>
> Also, if it's a bot I'm floored and the man who wrote it could probably
> solve cancer and world hunger with five lines of asm.
>

Yeah... when he/she/it first appeared the replies were at least mostly
lucid, if not necessarily helpful, and spawned a few interesting
discussions.  Recently it's gone downhill... Could be some sort of bot
that was trying to learn 'speech' patterns and it overloaded its
database.  (I've seen that happen on at least one chatbot...)


From alex.gaynor at gmail.com  Tue May 13 20:06:57 2008
From: alex.gaynor at gmail.com (alex.gaynor at gmail.com)
Date: Tue, 13 May 2008 17:06:57 -0700 (PDT)
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
Message-ID: <ab078e30-26c9-4466-9d9b-8bbc51219b17@59g2000hsb.googlegroups.com>

On May 13, 6:57?pm, Nikhil <mnik... at gmail.com> wrote:
> which one is better? and why?
>
> __len__() is a built-in function of the list object and is updated along
> with the list object elements and will be useful incase the list is very
> huge.
>
> len() is an external method again, which may require the processing
> cycles again.
>
> Is it right?

len() is the correct way to do it, methods that begin with __ are
meant to be more internal.


From nick at craig-wood.com  Mon May 19 06:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 19 May 2008 05:30:03 -0500
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
	<mailman.1327.1211169331.12834.python-list@python.org>
Message-ID: <slrng32lb3.e6k.nick@irishsea.home.craig-wood.com>

Matt Nordhoff <mnordhoff at mattnordhoff.com> wrote:
>  Tommy Nordgren wrote:
> > class MyClass : a_base_class
> >       memberlist=[]
> > 
> > #  Insert object in memberlist when created;
> > #  note: objects won't be garbage collected until removed from memberlist.
> 
>  Just to say, if you wanted to go about it that way, you could avoid the
>  garbage collection problem by using weakrefs:
> 
> <http://docs.python.org/lib/module-weakref.html>

Eg...

from weakref import WeakKeyDictionary

class Test(object):
    _instances = WeakKeyDictionary()
    def __init__(self):
        self._instances[self] = True
        # your normal init stuff here
    @classmethod
    def instances(cls):
        return cls._instances.keys()

print Test.instances()
a = Test()
b = Test()
print Test.instances()
del a
print Test.instances()
del b
print Test.instances()

....

Which prints

[]
[<__main__.Test object at 0xb7d4eb6c>, <__main__.Test object at 0xb7d4eb4c>]
[<__main__.Test object at 0xb7d4eb6c>]
[]


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From dave.g1234 at gmail.com  Fri May 16 18:05:59 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 15:05:59 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com> 
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>
Message-ID: <7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com>

On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>
> > Thanks for the responses.  I'm well aware that the function can be
> > passed in the parameters, passing in the functino as an arg defeats
> > the purpose of what I'm going after.
>
> Why so ?
> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> > but a perfunctory glance looks like we're doing the close to the same
> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> > can pass in other parameters to foo.
>
> I may be wrong (if so please pardon my lack of intelligence and/or
> provide a couple use case), but it looks like you're trying to
> reinvent partial application.
>
> from functools import partial
> def foo(x, y):
>   return x + y
>
> pfoo = partial(foo, 2)
> print pfoo(42)
>
> Don't know if this helps...

Ok, so that solves the issue of the aforementioned compose function.
We could do compose( partialfoo,....) ) etc (although I might say I
prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
provide wrapper around an object that lets you call abritrary
functions on that object with it as a parameter - i.e., as if it were
a method in a class.  The partial function was only a component of the
code I posted earlier. Or am I missing something you're saying?

best
dave




From matthieu.brucher at gmail.com  Wed May 21 17:17:12 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Wed, 21 May 2008 23:17:12 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <e76aa17f0805211417u4262d9a9i9e5cc8d265832209@mail.gmail.com>

2008/5/21 Dave Parker <daveparker at flamingthunder.com>:

> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
> > My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's why there is the Decimal module.
That's why the IEEE standard exists as well, because it is not possible to
always use what you call multi-precision floating point with decent speed.
That's why numerical analysis exists.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From bruno.desthuilliers at gmail.com  Mon May 19 16:46:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:46:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
Message-ID: <92857241-ef7c-482f-a7cb-8ee81edd8317@e53g2000hsa.googlegroups.com>

On 19 mai, 17:53, Henrique Dante de Almeida <hda... at gmail.com> wrote:

(snip)

>  Yes, I was actually referring to statically typed JIT-compiled
> languages. Sorry about that, blame the beers that entered my digestive
> system that night. :-P

for beer in beers:
  if beer.entered_henrique_digestive_system_last_night:
    beer.blame()

!-)


From s0suk3 at gmail.com  Mon May 19 02:08:11 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 18 May 2008 23:08:11 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com> 
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
Message-ID: <3b0ba35b-c2b9-4ab2-8e7c-fecebce465c2@d77g2000hsb.googlegroups.com>

On May 18, 7:25 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Sun, 18 May 2008 16:17:55 -0700 (PDT)
>
> Mensanator <mensana... at aol.com> wrote:
> > I see no need for GUI in any of these applications.
>
> Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)
>
> Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)

I do mostly Internet protocol server/proxy-side applications. One of
the fun things about those kinds of programs is that you get away from
the whole "user interface design" concept, because you normally don't
have to do any kind of user interface (neither command-line-based, GUI-
based, web-based, nor anything), since you're not designing something
to serve an end user, but to work as a lonely daemon and serve some
kind of Internet service. So I think that'd be a good alternative for
you.

Every now and then, however, I do build some interface (mostly GUI),
such as a monitor, notification mechanism, etc. But I never feel like
I'm losing focus on the actual problem; maybe because I develop the
core program first and the think about a possible and optional
interface. Maybe a good suggestion is to put the GUI stuff on another
module or package, and make interface functions or methods to handle
the needed GUI controls, so that the GUI stuff shows up as little as
possible in the core part of the program.


From nagle at animats.com  Sun May 25 21:46:27 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 25 May 2008 18:46:27 -0700
Subject: Getting a set of lambda functions
In-Reply-To: <g1bjcj$u3m$1@aioe.org>
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <483a1319$0$34516$742ec2ed@news.sonic.net>

Martin Manns wrote:
> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda
> functions to use this property for comparison). 
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution
> is not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>>> funclist = [eval('lambda x:' + func) for func in func_strings]

   What are you actually trying to do, anyway?  What's the application?

   You probably don't want to use "eval" that way.  If you want function
objects out, use "compile".

					John Nagle


From goldnery at gmail.com  Fri May 23 11:45:11 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 08:45:11 -0700 (PDT)
Subject: Another Question
Message-ID: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>

How can i bind function that handle the mouse clicking  window X event
or clicking alt+F4


thanks


From bockman at virgilio.it  Mon May  5 13:22:32 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Mon, 05 May 2008 19:22:32 +0200
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <pan.2008.05.05.17.22.31.608410@virgilio.it>

On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:

> Hi,
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
> 
> import conf
> print conf.SomeVariable
> 
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.
> 
> I want to store this data in some conf file (txt) and would like to
> use it same way as I am using these variables as defined in py
> files.
> 
> one solution I can think of is writing data as a dictionary into conf
> file. and then by reading data, apply eval on that data. and update
> local dict? but this is not a good solution....
> 
> any pointers?
> 
> Sandip

 The 'simple but relatively dangerous way', already suggested, is to
 reload() the module. 

A safer way - but requiring more work - could be to build something around
the Configparser module in the standard library ...

Ciao
-----
FB


From castironpi at gmail.com  Fri May 16 11:43:52 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:43:52 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <90c5b91a-06a5-4e2e-b166-dda83e899366@m36g2000hse.googlegroups.com>

On May 16, 6:43?am, Ant <ant... at gmail.com> wrote:
> Hi all,
>
> I have a question on PyParsing. I am trying to create a parser for a
> hierarchical todo list format, but have hit a stumbling block. I have
> parsers for the header of the list (title and description), and the body
> (recursive descent on todo items).
>
> Individually they are working fine, combined they throw an exception.
> The code follows:
>
> #!/usr/bin/python
> # parser.py
> import pyparsing as pp
>
> def grammar():
> ? ? ?underline = pp.Word("=").suppress()
> ? ? ?dotnum = pp.Combine(pp.Word(pp.nums) + ".")
> ? ? ?textline = pp.Combine(pp.Group(pp.Word(pp.alphas, pp.printables) +
> pp.restOfLine))
> ? ? ?number = pp.Group(pp.OneOrMore(dotnum))
>
> ? ? ?headtitle = textline
> ? ? ?headdescription = pp.ZeroOrMore(textline)
> ? ? ?head = pp.Group(headtitle + underline + headdescription)
>
> ? ? ?taskname = pp.OneOrMore(dotnum) + textline
> ? ? ?task = pp.Forward()
> ? ? ?subtask = pp.Group(dotnum + task)
> ? ? ?task << (taskname + pp.ZeroOrMore(subtask))
> ? ? ?maintask = pp.Group(pp.LineStart() + task)
>
> ? ? ?parser = pp.OneOrMore(maintask)
>
> ? ? ?return head, parser
>
> text = """
>
> My Title
> ========
>
> Text on a longer line of several words.
> More test
> and more.
>
> """
>
> text2 = """
>
> 1. Task 1
> ? ? ?1.1. Subtask
> ? ? ? ? ?1.1.1. More tasks.
> ? ? ?1.2. Another subtask
> 2. Task 2
> ? ? ?2.1. Subtask again"""
>
> head, parser = grammar()
>
> print head.parseString(text)
> print parser.parseString(text2)
>
> comb = head + pp.OneOrMore(pp.LineStart() + pp.restOfLine) + parser
> print comb.parseString(text + text2)
>
> #===================================================================
>
> Now the first two print statements output the parse tree as I would
> expect, but the combined parser fails with an exception:
>
> Traceback (most recent call last):
> ? ?File "parser.py", line 50, in ?
> ? ? ?print comb.parseString(text + text2)
> .
> . [Stacktrace snipped]
> .
> ? ? ?raise exc
> pyparsing.ParseException: Expected start of line (at char 81), (line:9,
> col:1)
>
> Any help appreciated!
>
> Cheers,
>
> --
> Ant.

I hold that the + operator should be overloaded for strings to include
newlines.  Python 3.0 print has parentheses around it; wouldn't it
make sense to take them out?


From michele.simionato at gmail.com  Thu May 29 07:19:12 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 29 May 2008 04:19:12 -0700 (PDT)
Subject: cmd.Cmd bug or at least docu-bug
References: <6a7b72F3467inU1@mid.uni-berlin.de>
Message-ID: <78925615-83f4-4197-a922-6e34287774e9@34g2000hsf.googlegroups.com>

On May 29, 11:26?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Hi,
>
> I'm fiddling around with module cmd. I tried to pass my own streams as
> replacements for stdin and stdout. However, stdin wasn't working. After a
> look into the sourcecode I discovered that there is an class-variable
> called
>
> use_rawinput
>
> that prevents using the passed stdin. I then read the docs again - and found
> it described. However, I think it should be mentioned on the first page
> where the constructor is described that without setting use_rawinput to
> False, stdin will be ignored.
>
> Or even better either make use_rawinput set to false in case stdin is passed
> anything but None or at least make it a keyword argument.
>
> Any thoughts about this?
>
> Diez

I run into the same issue and I solved it by using a custom subclass
of Cmd, but I agree
that the cmd module could be improved. I even wrote a cmd2 module that
I should publish
one day or another. +1 to submit a bug report.

 Michele Simionato


From upton at virginia.edu  Thu May 22 00:59:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 00:59:44 -0400
Subject: related to python
In-Reply-To: <g12m30+ejo5@eGroups.com>
References: <g12m30+ejo5@eGroups.com>
Message-ID: <5504f9ac0805212159u174437ccs4409d83381c6a804@mail.gmail.com>

This looks like a homework assignment, but...

On Wed, May 21, 2008 at 10:34 PM, salil_reeves <salil_reeves at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');

I think a question similar to this was answered on the list today or
yesterday, for removing spaces and hyphens.

> 2. stripping away any leading and trailing blank spaces; and

If your solution for part 1 can't be extended to cover this... you
might have to find another way to "strip" the the spaces ;)

> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.

Assuming you have some sort of dictionary mapping words to ELIZA
words, you should be able to iterate through all of the words in the
input and, using that dictionary, swap the key for the value in your
input string.

There, I think those are sufficiently vague as to not do your homework
for you, but maybe get you started...


From daveparker at flamingthunder.com  Wed May 21 11:34:15 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 08:34:15 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
Message-ID: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>

On May 20, 7:05?pm, Collin <collinye... at shaw.ca> wrote:

> Personally, FT is a bit meh to me. The way you issue your statements I
> always think something is wrong, mainly because when I want to define,
> say, x, in python I'd go:
>
> x = "whatever"
>
> Instantly noting that I defined x. While in Flaming Thunder I'd have to
> type:
>
> Set x to "whatever"
>
> It just feels wrong.

Actually, it felt wrong to me when I first started working on Flaming
Thunder because I've been programming for decades and have had all of
the programming idioms burned into my brain.

But after getting input from children and teachers, etc, it started
feeling right.

For example, consider the two statements:

     x = 8
     x = 10

The reaction from most math teachers (and kids) was "one of those is
wrong because x can't equal 2 different things at the same time".
Many computer languages conflate "equality" with "assignment" and then
go to even more confusing measures to disambiguate them (such as using
== for equality, or := for assignment).

Plus, symbols are more confusing for people to learn about than
words.  There are lots of people who are fluent in English, but
dislike math.

So, I opted for a simple, unambiguous, non-mathematical way of
expressing "assignment" which makes sense even to the non-
mathematically inclined:

     Set x to 8.

That way, = can be reserved unambiguously and unconfusingly for the
mathematical notion of "equality" -- because it's in their math
classes that people learn what = means:

Set QuadraticEquation to a*x^2 + b*x + c = 0.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:17:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:17:02 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
Message-ID: <48327ae9$0$15299$426a74cc@news.free.fr>

notnorwegian at yahoo.se a ?crit :
> i am confused.
> 
> x=5
> y=5
> 
> x==y -> True
> x is y -> True
> 
> shouldnt x is y return False since they shouldnt(dont?) point to the
> same place in memory, they just store an equal value?

Python's "variable" do not "store values", they are name to object 
bindings. x = 5 is a shortand for globals()['x'] = int(5), which means 
"create an int instance with value 5 and bind it to the name 'x' in the 
global namespace'. wrt/ the identity test yielding true, it's the result 
of a CPython specific optimisation for small integer objects, that are 
cached and reused. Since Python integers are immutable, they can safely 
be shared. Now since it's an implementation specific thing, you should 
by no mean rely on it.



From __peter__ at web.de  Fri May 23 04:48:16 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:48:16 +0200
Subject: KeyError in pickle
References: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com>
Message-ID: <g160ce$r41$01$1@news.t-online.com>

christof wrote:

> I am using pickle/unpickle to let my program save its documents to
> disk. While this it worked stable for a long time, one of my users now
> complained, that he had a file which can't be loaded.
> 
> The traceback is:
> 
>     File "pickle.pyo", line 1374, in loads
>     File "pickle.pyo", line 858, in load
> KeyError: 'A'
> 
> 
> Does anybody know this problem. How this can happen and how can I
> avoid it?

Is this reproducible? How? If not I would guess that the file is corrupted.

Peter


From afrobeard at gmail.com  Tue May 13 18:39:25 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:39:25 -0700 (PDT)
Subject: What is self.file = file for?
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>

If you are familiar to C++ or a similar language, the concept of the
this pointer might not be alien to you. self in this context is
basically a reference to the class itself. Hence self.file is creating
a class member and setting to the input from file.

As Gary pointed out, during initialization, only the latter parameter
i.e. file is being passed to __init__

You can get a brief tutorial from http://docs.python.org/tut/node11.html
about classes in python.

On May 14, 3:08?am, wxPytho... at gmail.com wrote:
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
> ? ? """Print and number lines in a text file."""
> ? ? def __init__(self, file):
> ? ? ? ? self.file = file
> ? ? ? ? .
> ? ? ? ? .
> ? ? ? ? .
>
> When would you do a thing like ?self.file = file ?? I really don't
> find an answer on this. Please help me understand this.



From mensanator at aol.com  Thu May  1 14:34:44 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 1 May 2008 11:34:44 -0700 (PDT)
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
References: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>
Message-ID: <72c27738-3d8a-4a9d-8250-17e4d4f8cad3@a70g2000hsh.googlegroups.com>

On May 1, 8:11?am, prabain... at gmail.com wrote:
> ? ? ? ? ? ? ? ? ? ? HELLO FRIEND IAM SHALINI,
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? DO U WANT TO KNOW ABOUT
> SCIENTOLOGY?

Do I need to know about wiping my ass with a rock?

Oh, wait...that's Islam, isn't it?

Sorry, I often get those two confused.

Scientology and ass wiping.

>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?PLS LOOK AT THE BELOW
> WEBSITE.
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?www.bigconcern3.blogspot.com


From wizzardx at gmail.com  Sat May  3 15:54:55 2008
From: wizzardx at gmail.com (David)
Date: Sat, 3 May 2008 21:54:55 +0200
Subject: State machine Example in Python
In-Reply-To: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
References: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>
Message-ID: <18c1e6480805031254j7647d5a4rfa4aeb4b5613298f@mail.gmail.com>

On Sat, May 3, 2008 at 6:26 PM, Alok Kumar <alokkat at gmail.com> wrote:
> Can someone please redirect me for a state machine example or design pattern
> used in Python.
>

Google for it, eg:

http://www.google.com/search?q=python+state+machine

There's plenty of results. Be more specific if you can't get what you
want from Google.

David.


From rschroev_nospam_ml at fastmail.fm  Tue May 20 15:27:55 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 20 May 2008 21:27:55 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
Message-ID: <0DFYj.28609$ie5.21801@newsfe05.ams2>

Wow this resulted in far more reactions than I had expected ...

bruno.desthuilliers at gmail.com schreef:
> On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
> wrote:
>> Bruno Desthuilliers schreef:
>>
>>> 1/ being interpreted or compiled (for whatever definition of these
>>> terms) is not a property of a language, but a property of an
>>> implementation of a language.
>>> 2/ actually, all known Python implementations compile to byte-code.
>> You keep saying that, and in theory you're right.
> 
> "In theory" ??? Heck, both points above are mere facts. Well, I may
> accept that the 2nd one is a bit overgeneralized, since IIRC there's
> an experimental Python to javascript "compiler" in Pypy, but...
> 
>>  But I'm still inclined to disagree with it,  since the practical reality is different.
> 
> Do you mean that how source code written in a language (that is : a
> grammar  + a syntax) finally become a set of instructions executed by
> a CPU depends on the language (I repeat : a grammer + a syntax), and
> not on a piece of software turning the source code into something that
> can actually be executed by the CPU ?

No, that's not what I said; what I said is that some languages where 
designed with in the back of the head the idea that they were going to 
be compiled to native code, others to be interpreted, and others to be 
compiled to byte code.

Wikipedia says about C that "its design goals were for it to be compiled 
using a relatively straightforward compiler, provide low-level access to 
memory, provide language constructs that map efficiently to machine 
instructions, and require minimal run-time support". To me, that very 
strongly suggests that it was meant to be compiled to native code. It's 
called "portable assembly" for a reason. You *can* make it work in 
another way, and I suppose that it *is* done, but those implementations 
are far in the minority.

As for Python, until the advent of PyPy all implementations I known used 
a virtual machine (CPython, Jython, IronPython). And PyPy is still 
experimental as far as I know.

So yes, the transformation method from source code to something that the 
CPU understands depends on your tools. But if you want to get work done, 
the most common method by far for C is to use a toolchain that compiles 
to native code and for Python a byte code compiler + virtual machine. 
With possibly a JIT compiler, that's true.

>> Python is
>> indeed compiled to byte code, but if you compare that byte code with
>> assembly code you'll see that there's a whole world of difference
>> between the two,
> 
> Obviously, yes - at least for all assembly language I've seen so far.
> But whoever said otherwise ?

Whenever someone says that Python is interpreted, you respond saying 
that that's not true, since it's compiled to byte code. Correct of 
course, but somehow it appears to me that you imply that that makes 
Python closer to a C-like language than to an interpreted language, and 
that's not correct (IMO). If that's just a misinterpretation by me, I 
apologize.

>>  largely because of the dynamical nature of Python. Fact
>> is that Python was designed from the start to run on a virtual machine,
>> not on the native hardware.
> 
> Nope. The facts are that
> 1/ Python (the language) has *not* been designed with ease of
> implementation of an optimizing native-code compiler in mind,  and
> 2/ CPython (the first and reference implementation) has been designed
> to use a byte-code + VM scheme

Isn't that more or less the same as what I said?

Maybe I don't make enough distinction between Python the language and 
CPython the implementation, but Python development does happen on the 
CPython implementation (Python 3.0 alpha releases are CPython releases, 
for example).

> 
>> C OTOH was designed to be compiled to assembly code (or directly to
>> machine code)
> 
> Note quite. C has been designed to make it as easy as possible to
> write either a C to assembly or C to native binary code compiler.

I find it hard to believe that during the development of C Dennis 
Ritchie was considering any other mode of operation than compilation to 
assembly or machine code. I might be wrong of course.

>> and as a result there are no (or virtually) no
>> implementations that interpret C or compile it to bytecode.
> 
> There's at least one (possibly incomplete) C interpreter.

I'd like to call that the exception that confirms the rule.

> There's a very naive belief we saw every here and then here, which is
> that "Python would be faster if it was compiled to native code". The
> point is that, given Python's (as a language) extrem dynamism,
> compiling it to native code wouldn't buy you much in terms of raw
> performances. The problem is not with writing a native-code
> compiler[1}, but with writing an *optimising* native-code compiler.

I admit I'm guilty of that belief. I know it's true what you say, but I 
  do have the more-or-less unconscious reflex 'compiled to native code 
== fast'.

> I'm just getting fed up with
> this "Python is an interpreted and therefore slow language" non-
> sense.  Python is a language, and as such is neither slow nor fast nor
> interpreted nor compiled nor <insert any implementation related stuff
> here>. And while CPython is not blazingly fast for computation-heavy
> stuff, it's not because it is "interpreted" - which it is not for a
> strict definition of "interpreted", but anyway...  - but because
> *optimizing* execution of an highly dynamic language is nothing,
> well,  err, trivial.

So you are saying that CPython is relatively slow because Python is a 
highly dynamic language. I know that CPython is not Python and Python is 
not CPython, but there is a very strong association between the two and 
therefore I think it's not really that much wrong to simplify that to 
'Python is slow because it is a highly dynamic language (until proven 
wrong by PyPy or another fast implementation'.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From kyosohma at gmail.com  Tue May 13 13:44:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 10:44:16 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>

On May 13, 10:28?am, Paul Miller <neokos... at gmail.com> wrote:
> Does anyone know of any (preferably largish) examples of literate
> programs written using Python? ?Alternatively, does anyone know of any
> literate programming tools which support Python well? ?(I am aware of
> Leo and I've been to literateprogramming.com, but any additional
> pointers would be much appreciated!)
>
> Thanks,
>
> Paul

Check out Zope, bittorrent, or Editra. You should just go to
SourceForge and do a search for projects done in Python.

Mike


From johnjsal at NOSPAMgmail.com  Tue May 20 00:09:14 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 00:09:14 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 19:06:10 +0100
"Matt Porter" <mabbikeel at gmail.com> wrote:

> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>   "AAAABBBC" -> "ABC"

Not that you need help anymore, but I decided to give it a try. Not as elegant as the one- and two-liners, but somewhat concise I guess.

def compress(s):
    new = [s[:1]]

    for c in s[1:]:
        if c not in new:
            new.append(c)
    return ''.join(new)


From tarundevnani at gmail.com  Wed May  7 08:25:12 2008
From: tarundevnani at gmail.com (tarun)
Date: Wed, 7 May 2008 17:55:12 +0530
Subject: Some issue with right click in TreeCtrl
Message-ID: <c88245360805070525w2ae8e5fbq603c3088ae1f3c13@mail.gmail.com>

Hello All,

Please find the code for a simple wx.TreeCtrl code. Whenever I right click
on any item in the Tree, I see the function, 'OnSelChanged' gets called
twice.

What I've just done is that I've associated the function 'OnRightClick' with
wx.EVT_TREE_ITEM_RIGHT_CLICK. And in this function, I say
self.tree.SelectItem(evt.GetItem(),True) to select the item and then so some
action for right click.

Can any one help.

Thanks & Regards,
Tarun

*Please find the code in the attachment and also below:-*

import wx
tests = ["All Tests",
  ["Suite1",
    "test01",
             "test02",
             ["suite2","test03","test04"],
    "test05",
  ],
  ["Suite3",
    "test06",
    "test07"
  ],
  ["Suite4",
    "test08",
    "test09"
  ],
  "test10",
  "test11",
]
class TestFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Simple Tree", size=(400,500))
        # Create the tree
        self.tree = wx.TreeCtrl(self)
        # Add a root node
        root = self.tree.AddRoot(tests[0])
        # Add nodes from our data set
        self.AddTreeNodes(root, tests, 0)
        # Bind some interesting events
        self.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, self.tree)
        self.Bind(wx.EVT_TREE_ITEM_RIGHT_CLICK, self.OnRightClick,
self.tree)
        # Expand the first level
        self.tree.Expand(root)

    def AddTreeNodes(self, father, aTestList,count):
        if type(aTestList) == type([]):
            l = len(aTestList)
            i = 0
            while i < l:
                if i == 0:
                    if count ==1:
                        father = self.tree.AppendItem(father, aTestList[i])
                else:
                    self.AddTreeNodes(father, aTestList[i],
1)
                i = i + 1
        if type(aTestList) == type(""):
            self.tree.AppendItem(father, aTestList)

    def OnRightClick(self, evt):
        self.tree.SelectItem(evt.GetItem(),True)
        print 'In OnRightClick Function...',self.GetItemText(evt.GetItem())

    def GetItemText(self, item):
        if item:
            return self.tree.GetItemText(item)
        else:
            return ""

    def OnSelChanged(self, evt):
        print "OnSelChanged:   ", self.GetItemText(evt.GetItem())

app = wx.PySimpleApp(redirect=True)
frame = TestFrame()
frame.Show()
app.MainLoop()
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From python at bc90021.net  Sun May 11 16:12:38 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 20:12:38 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<Xns9A9BD4DD2720duncanbooth@127.0.0.1>
Message-ID: <WqIVj.32521$KJ1.6884@newsfe19.lga>

On Sun, 11 May 2008 19:55:31 +0000, Duncan Booth wrote:

> 7stud <bbxx789_05ss at yahoo.com> wrote:
> 
> 
>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\"
>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? +
>> self.matrix[c][0] + "_other.txt\""
> 
> It wouldn't exactly result in either of the error messages you posted,
> but I expect the spurious quote marks round the filename will be giving
> you problems.
> 
> Surely you want the filename to be something like
> 'proctemp\fred_other.txt' rather than '"proctemp\fred_other.txt"' with
> the spurious double quotes?

Yup, that's what it was.  I figured it out two seconds before this post.  
However, it will be interesting to see how it handles files with spaces 
in the name...

Thanks for your help!



From zerty.david at gmail.com  Thu May  1 20:31:01 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 1 May 2008 21:31:01 -0300
Subject: Problems with psycopg2
Message-ID: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>

Hi all
I have this function:
def checkName(self, name):
        cur = self.conn.cursor()

        sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
        cur.execute(sql)
        rows = cur.fetchall()

        if rows == "[]":
            self.insert()

It seems to work fine, But I'm getting this exception:
psycopg2.ProgrammingError: current transaction is aborted, commands ignored
until end of transaction block
at: cur.execute(sql)

What's the problem?
thx

ps: fn_pat is the column of the db, name is the string passed in the
function parameter
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From sn at sncs.se  Fri May 23 11:30:36 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Fri, 23 May 2008 08:30:36 -0700 (PDT)
Subject: How to print a sorted list as a multi-column table
Message-ID: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>

Hi all,

I would like to ask about opinions about the best way to format sorted
tables of items for interactive use. I have begun to add interactive
help to Guppy/Heapy (http://guppy-pe.sourceforge.net) because it lacks
the usual ways for introspection (see for example
http://www.pkgcore.org/trac/pkgcore/doc/dev-notes/heapy.rst) which is
due to Heapy's use of dynamic things like __getattr__ and to some
extent properties.

There seems to be no (good or otherwise) way to hook into the standard
help() (?) (At least not before 2.6 where I recall seeing a __dir__
magic method may be introduced, but I want it to be backwards
compatible to at least 2.4, preferably to 2.3.)

So I am about to roll my own help system. It will be based on having
the API objects supplying a standardized '.help' attribute which can
be used interactively, and will limit the output it prints to say 15
or 20 rows at a time.

That's for a background. Now what I was stumbling on which pumped up
enough adrenalin to make me begin to write this ---

Why are tables formatted like the following, when sorted? (Both in
linux eg ls, ftp help, and in Python help() when listing (eg)
modules))

(1)

a  g  m  s
b  h  n  t
c  i  o  u
d  j  p  v
e  k  q
f  l  r

Wouldn't it be more natural to just sort them like this:

(2)

a  b  c  d
e  f  g  h
i  j  k  l
m  n  o  p
q  r  s  t
u  v

What's the rationale for the choice of (1)?

In a pager, if you want to limit the number of lines output at a time,
then yo'd see with (1) (if artifically limiting output to 2 lines):

a  g  m  s
b  h  n  t

So to see the f item you would have to scroll down all the way.  The
number of times you would have to scroll down is in completely
unrelated to the item's position in sort order. That seems to defeat
the purpose of sorting in the first place. It feels strange, to me at
least. Anybody had the same feeling?

Well, what's the rationale (if any) for using the layout (1)?
Wouldn't layout (2) be better? And/or would it be confusing /
non-pythonic / non-unlixonic if a program used the (2) layout instead?

Have a (:nice:) weekend :-)

Sverker


From mail at timgolden.me.uk  Wed May  7 03:58:33 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 08:58:33 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
Message-ID: <48216129.5090405@timgolden.me.uk>

Unknown Hero wrote:
> Tim Golden wrote:

[... snip long example ...]

> Correct me if I'm wrong (which I just might be), but doesn't the above
> code go through the keys behind HKEY_LOCAL_MACHINE\Software\Timsoft\ ?
> 
> Is it possible to use an empty value in:
> 
>   hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
> 
> like:
> 
>   hTimSoft = _winreg.OpenKey (HKLM, "")
> 
> so it would go all subkeys behind the "root" (in this case,
> HKEY_LOCAL_MACHINE)?

Yes. (Well, you can try it and find out for yourself!). As I said, this
was code to illustrate some other poster's difficulty. I assume that
you're capable of twisting it to suit your own purposes :)

> The code is supposed to work even if I don't know all possible subkeys
> under HKEY_LOCAL_MACHINE. Creating dozens or hundreds of handles like
> the above is a bit... unappealing.
> 
> Can I also use HKLM in the place of hTimSoft when I want to determine
> the amount of subkeys it has, like you did over here:

Yes. You can put any key handle you like in place of my
hTimSoft of the predefined _winreg.HKEY_LOCAL_MACHINE. They're
just keys. I assume you'll want some kind of recursive function which
combines calls to EnumKeys and EnumValues. 

> Anyway, the above code seems interesting. I'll try a few tweaks here
> and there and see what happens.

I wasn't sure just how experienced you were with programming; although you
said you were new to Python I thought you might have experience elsewhere
which would help you out here. If you're really stuck, post back and I (or someone
else) can try to knock up a more pertinent example. The main thing is for you
to get hold of the _winreg docs -- which I know you mentioned before -- and to
grasp what the concepts are and how the API calls work. It's a low-level module,
simply exposing the raw API calls, which is why there are several wrapper modules
around it, but it's worth getting to understand what's going on under the covers.

TJG



From s0suk3 at gmail.com  Mon May 19 11:48:42 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Mon, 19 May 2008 08:48:42 -0700 (PDT)
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
Message-ID: <e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>

On May 19, 10:25 am, "Alan Wright" <alan.wri... at volubill.com> wrote:
> Hi Folks,
> I am newbie to Python, but have successfully created a simple client and
> server setup, I have one issue though.
>
> I am trying to test a box by sending many TCP conns (WHILE loop) but not
> closing them with a FIN/RST. However, no matter what i do, i cannot get the
> loop to stop sending FIN from the client.
>
> Any clues?
>
> Here is my current script
>
> #!/usr/bin/python
>
> import socket,sys
> from numpy import *
> num1=0
>
> while (num1<=10) :
>
>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>  s.settimeout(10.0)
>  s.connect(("10.1.1.69", 50008)) # SMTP
>  print s.recv(1024) + '\n',
>  num1=num1+1
>  #s.close()
>
> sys.exit(1)

socket.socket instances do an implicit close() on the socket when the
object is destructed (in this case, it's destructed when it is garbage-
collected). What's happening is that on each iteration, the variable
"s", which references the socket.socket instance, is assigned to a new
socket.socket instance, therefore the instance of the previous
iteration is no longer referenced by "s", and since it's no longer
referenced by anything, the instance is garbage-collected,
automatically imposing an implicit close() on that instance. A simple
solution could be to create a list and append the socket.socket
instance of each iteration to that list, that way the instances would
remain referenced in the list and not be garbage-collected; though you
might be able to find a more elegant solution.

Sebastian


From python at bc90021.net  Sun May 11 13:59:13 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:59:13 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<mailman.943.1210528308.12834.python-list@python.org>
Message-ID: <RtGVj.32506$KJ1.14616@newsfe19.lga>

On Sun, 11 May 2008 10:51:34 -0700, Gary Herron wrote:

> bc90021 wrote:
>> Hi All,
>>
>> Thanks in advance for any and all help!
>>
>> I have this code:
>>
>> g = open(fileName, 'a')
>>   
>>   
> I don't believe you.  I think you have something like
> 
>     g = open('fileName', 'a')
> 
> instead of (as you claim)
> 
>     g = open(fileName, 'a')
> 
> Do you see the difference?
> 
> Develop the skill of reading the error messages *very* carefully.  Your
> error says there is no file named "fileName", and if you think about
> what's on your disk, I'll bet you won't find a file whose name is
> "fileName".
> 
> 
> Gary Herron
> 
Gary,

I can assure you that that's not the case.  (Of course, you're free to 
believe me or not believe me at your convenience.)  You are right that I 
don't have that file on the disk - it is supposed to be created with the 
"open" line!  It works *perfectly* outside the class the inherits from 
threading.Thread; inside the threading.Thread class it does NOT create 
the file, whether I use g = open(fileName, 'a') or g = open (fileName, 
'w').  Hence my obvious confusion.


From victorsubervi at gmail.com  Thu May  1 18:31:25 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 1 May 2008 17:31:25 -0500
Subject: Custom Classes?
In-Reply-To: <1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
Message-ID: <4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>

On Wed, Apr 30, 2008 at 12:35 PM, J. Cliff Dyer <jcd at unc.edu> wrote:

> Post working code, and I'll answer your actual question.


Good grief!  The code is *not* double spaced! Take a look. Click to the end
of the first line and hit the right arrow key, and see for yourself.  As for
not initializing w, well, I did in my code and just forgot to cut and paste
that. Same with the except. Sorry on those. And yes, I pull out try clauses
when I need to look at stacks. Here:

w = 0

try:

  w += 1

  getpic = "getpic" + str(w) + ".py"

  try:

    os.remove(getpic)

  except:

    pass

  code = """

#!/usr/local/bin/python

import cgitb; cgitb.enable()

import MySQLdb

import cgi

import sys,os

sys.path.append(os.getcwd())

from login import login

user, passwd, db, host = login()

form = cgi.FieldStorage()

picid = int(form["id"].value)

x = int(form["x"].value)

pics =
{1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\

9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}

pic = pics[x]

print 'Content-Type: text/html'

db = MySQLdb.connect(host=host, user=user, passwd=passwd, db=db)

cursor= db.cursor()

sql = "select " + pic + " from products where id='" + str(picid) + "';"

cursor.execute(sql)

content = cursor.fetchall()[0][0].tostring()

cursor.close()

print 'Content-Type: image/jpeg'

print

print content

"""

  script = open(getpic, "w")

  script.write(code)

  print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">' % pic

  print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d, y)

except:

  pass


TIA,
Victor
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From zxo102 at gmail.com  Sat May 24 18:59:55 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 15:59:55 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in 
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
Message-ID: <e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>

But this is not "\xED\x6F\x3C\x01".  I need it for
struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
(IEEE 754).
Any other suggestions?

ouyang

On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> [ zxo102 <zxo... at gmail.com> ]
>
> >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > "\xED\x6F\x3C\x01" in python coding?
> > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > the error information : invalid \x escape.
>
> [1]--> 'ED6F3C01'.decode('hex')
> Out[1]: '\xedo<\x01'
>
> - --
> Freedom is always the freedom of dissenters.
>                                       (Rosa Luxemburg)
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2.0.9 (GNU/Linux)
>
> iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> =jxll
> -----END PGP SIGNATURE-----



From notnorwegian at yahoo.se  Sun May 25 03:10:45 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 00:10:45 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
Message-ID: <6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>

On 25 Maj, 08:56, Rares Vernica <ra... at ics.uci.edu> wrote:
> use a set to store them:
>
> >>> s=set()
> >>> s.add('a')
> >>> s.add('b')
> >>> s
> set(['a', 'b'])
> >>> s.add('a')
> >>> s
> set(['a', 'b'])
> >>> s.add('c')
> >>> s
>
> set(['a', 'c', 'b'])
>
>
>
> it does remove duplicates, but is it not ordered. to order it you can
> use:
>
> >>> l=list(s)
> >>> l.sort()
> >>> l
>
> ['a', 'b', 'c']
>
> hth,
> Rares

sets dont seem to be so good because there is no way to iterate them.

s.pop()  	 	remove and return an arbitrary element from s; raises
KeyError if empty

i dont want to remove i just want to get the string that is stored
there.


From stefan_ml at behnel.de  Sat May 24 02:18:37 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 24 May 2008 08:18:37 +0200
Subject: simple url regexp
In-Reply-To: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>
References: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>
Message-ID: <4837B33D.4080007@behnel.de>

notnorwegian at yahoo.se wrote:
> url = re.compile(r"((http|ftp|https)\:\/\/)(www)?([a-zA-Z]{1}([\w\-]+
> \.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+
> \.[\w]{3,4})?((\?\w+=\w+)?(&\w+=\w+)*)?")
> 
> damn i hate these things.
> 
> i want it to only match http://www.name.any/etc
> 
> not http://wiki.x etc

Why don't you use urlparse and check the result yourself?

Stefan


From notnorwegian at yahoo.se  Sat May 24 01:18:58 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 22:18:58 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
	<87mymgb8hn.fsf@benfinney.id.au>
Message-ID: <5def9628-1332-4c18-b123-e5eef1a810d1@t54g2000hsg.googlegroups.com>

On 24 Maj, 07:01, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> notnorweg... at yahoo.se writes:
> > On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > Can you tell us exactly which programs you mean when you say "the
> > > shell" and "the commandprompt"?
>
> > commandprompt = windows dos-windows
>
> > shell = standard python interactive prompt
>
> Thanks.
>
> Be aware that referring to "the shell" without further qualification
> is usually understood to mean "the operating system shell", i.e. the
> command shell provided for running operating system commands.
>
> So, you're asking about the difference in behaviour between "the
> Windows command shell" versus "the Python interactive shell".
>
> --
>  \        ?I cannot conceive that anybody will require multiplications |
>   `\          at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
> _o__)                                                      Wales, 1936 |
> Ben Finney

yes


From mail at timgolden.me.uk  Thu May 15 12:09:19 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 15 May 2008 17:09:19 +0100
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <482C602F.4070203@timgolden.me.uk>

globalrev wrote:
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
> 
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()

Ummm. These are not the same files (unless you've got some bizarre
NTFS linking going on).

> exists returns false but when i open it doesnt complain. how come?

Also, in general, you're prone to race conditions if you do this
kind of thing, altho' on a local C: drive that's less likely. But
still possible. Probably better to wrap the open in a try-except
and handle an IOError.

TJG


From ptmcg at austin.rr.com  Fri May  9 18:54:21 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 9 May 2008 15:54:21 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
Message-ID: <1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>

On May 9, 5:19?pm, globalrev <skanem... at yahoo.se> wrote:
> i want to a little stringmanipulationa nd im looking into regexps. i
> couldnt find out how to do:
> s = 'poprorinoncoce'
> re.sub('$o$', '$', s)
> should result in 'prince'
>
> $ is obv the wrng character to use bu what i mean the pattern is
> "consonant o consonant" and should be replace by just "consonant".
> both consonants should be the same too.
> so mole would be mole
> mom would be m etc

from re import *
vowels = "aAeEiIoOuU"
cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
encodeRe = re.compile(r"([%s])[%s]\1" % (cons,vowels))
print encodeRe.sub(r"\1",s)

This is actually a little more complex than you asked - it will search
for any consonant-vowel-same_consonant triple, and replace it with the
leading consonant.  To meet your original request, change to:

from re import *
cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
encodeRe = re.compile(r"([%s])o\1" % cons)
print encodeRe.sub(r"\1",s)

Both print "prince".

-- Paul

(I have a pyparsing solution too, but I just used it to prototype up
the solution, then coverted it to regex.)


From bj_666 at gmx.net  Sat May 24 07:35:49 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 May 2008 11:35:49 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <69qcslF33dagrU5@mid.uni-berlin.de>

On Sat, 24 May 2008 13:12:13 +0200, Johannes Bauer wrote:

> Carl Banks schrieb:
> 
>> p = myfunction()
>> if p:
>>     print p
>> 
>> (I recommend doing it this way in C, too.)
> 
> This is okay for if-clauses, but sucks for while-loops:
> 
> while (fgets(buf, sizeof(buf), f)) {
> 	printf("%s\n", buf);
> }
> 
> is much shorter than
> 
> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> 	printf("%s\n", buf);
> 	tmp = fgets(buf, sizeof(buf), f);
> }

Can be written in Python as:

from functools import partial

# ...

for buf in iter(partial(f.read, buf_size), ''):
    print '%s\n' % buf

Ciao,
	Marc 'BlackJack' Rintsch


From banibrata.dutta at gmail.com  Tue May  6 09:51:05 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 19:21:05 +0530
Subject: Module to read input from commandline
In-Reply-To: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
References: <mailman.649.1210079867.12834.python-list@python.org>
	<dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
Message-ID: <3de8e1f70805060651r70767637wb6820fc156411a32@mail.gmail.com>

something like "curses" but w/o the fancy window decorations perhaps ?
if so, then following link might help (
http://www.amk.ca/python/howto/curses/).

thanks & regards,
banibrata

On Tue, May 6, 2008 at 6:56 PM, <james at reggieband.com> wrote:

> On May 6, 2:11 pm, pyt... at bdurham.com wrote:
>
> > Check out the optparse module as well. The optparse module supercedes(?)
> > the cmd module and offers a lot more functionality.
>
> Hi Malcom,
>
> Doesn't the optparse module work by parsing the arguments that are
> passed to the script when it is invoked?
>
> What I was looking for was a commandline read loop that executes
> within a script that is already running ... or can optparse be used in
> this context as well?
>
> Thanks,
> James.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From spectrumdt at gmail.com  Fri May  9 06:16:57 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 03:16:57 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <637ecc42-63f2-4ab0-b126-83059634f099@s50g2000hsb.googlegroups.com>

Thanks for all the replies.

On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> Ctrl+C often works with Python, but as with any language, it's possible
> to write a program which will not respond to it. ?You can use Ctrl+\
> instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> Ctrl+\ sends SIGQUIT which typically isn't)

Yes, thank you, this seems to work. :)

I did some more testing and found out that the problem seems to be
thread-related. If I have a single-threaded program, then Ctrl+C
usually works, but if I have threads, it is usually ignored. For
instance, the below program does not respond to Ctrl+C (but it does
die when issued Ctrl+\):



import threading

def loop():
  while True:
    pass

threading.Thread(target=loop,args=()).start()


From duncan.booth at invalid.invalid  Mon May 19 03:56:33 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 May 2008 07:56:33 GMT
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<MwBXj.47168$3v1.19158@bignews3.bellsouth.net>
Message-ID: <Xns9AA35AABD7931duncanbooth@127.0.0.1>

Hans Nowak <zephyrfalcon!NO_SPAM!@gmail.com> wrote:

> The way I see it, a class method is really just sugar for a function
> operating on the class, living in the class namespace.  As such, they
> are basically redundant, and as you point out, they can always be
> replaced by a function outside the class (and in fact, this was what
> people did before they came along in 2.2).  Personally, I don't use
> them... but some people like them.  Different strokes, and all that...
> 

In exactly the same way you could claim that a method is just sugar for a 
function operating on the instance living in the instance namespace. As 
such, you might think that they too are basically redundant, but they 
aren't: with instance methods you get the ability to override the method in 
a subclass without the caller needing to know whether they are calling the 
original method or an overridden version.

With class methods you also get the ability to override the method in a 
subclass, and again the caller doesn't need to know or care which variant 
when they call it.

Say you have a class hierarchy with a from_keys() class method. If you want 
to construct a new Foo you might call Foo.from_keys() without caring 
whether the method is the original one defined in one of Foo's base classes 
or a modified version specific to a Foo. If you were using functions then 
you would need to define a new from_keys() function for every class in a 
hierarchy, or at least for every different implementation in the hierarchy 
and the caller would need to be careful to call the correct one. So we end 
up with functions from_keys_Foo_or_Baz(cls) and from_keys_Bar() which is an 
unmaintainable mess.

-- 
Duncan Booth http://kupuguy.blogspot.com


From zondo42 at googlemail.com  Sun May  4 21:20:10 2008
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: Mon, 05 May 2008 02:20:10 +0100
Subject: Numpy not found
References: <9d1d26d4-6351-4557-9834-fd51669858df@34g2000hsf.googlegroups.com>
Message-ID: <m3wsm9im2d.fsf@googlemail.com>

adolfo <aguirre.adolfo at gmail.com> writes:

> I downloaded and installed Phyton 2.52 (it works), numpy-1.0.4.win32-
> py2.5, and scipy-0.6.0.win32-py2.5
>
> I can?t get Numpy to show up at Python?s  IDLE, or command line. If I
> do:
>
>>>>> import Numeric
> # I get
>>>>> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     import Numeric
> ImportError: No module named Numeric

Try 'import numpy' instead.  Numeric is an earlier incarnation of numpy --
it has (mostly) the same interface, but is a different package.  (Just to
confuse things even further, there's also another old one, called
numarray).

> And if I do:
>>>>> import Numeric *
> # I get
> SyntaxError: invalid syntax

The proper syntax for that is (assuming you want numpy instead) 'from numpy
import *'.

Glenn


From greg.ewing at canterbury.ac.nz  Sun May 18 07:25:45 2008
From: greg.ewing at canterbury.ac.nz (Greg Ewing)
Date: Sun, 18 May 2008 23:25:45 +1200
Subject: ANN: Pyrex 0.9.8.2
Message-ID: <mailman.1311.1211124282.12834.python-announce-list@python.org>

Pyrex 0.9.8.2 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

A block of external functions can now be declared nogil at once.

   cdef extern from "somewhere.h" nogil:
     ...

Also some minor nogil-related bugs have been fixed.


What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From thomas.karolski at googlemail.com  Thu May 22 22:28:22 2008
From: thomas.karolski at googlemail.com (thomas.karolski at googlemail.com)
Date: Thu, 22 May 2008 19:28:22 -0700 (PDT)
Subject: Decorator metaclass
Message-ID: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>

Hi,
I would like to create a Decorator metaclass, which automatically
turns a class which inherits from the "Decorator" type into a
decorator.
A decorator in this case, is simply a class which has all of its
decorator implementation inside a decorator() method. Every other
attribute access is being proxied to decorator().getParent().

Here's my attempt:
-------------------------------------------------------
from new import classobj

class DecoratorType(type):
	def __new__(cls, name, bases, dct):
		dct2 = {}
		for key, val in dct.iteritems():
			dct2[key] = val

		# create a new class which will store all of the implementation
		impl = classobj('%sImpl'%name,(),dct2)

		# update the old class to implement this implementation
		def __init__(self, *args, **dargs):
			object.__setattr__(self, '__impl', impl(*args, **dargs))
		def decorator(self):
			return object.__getattribute__(self,'__impl')
		def __getattribute__(self, attr):
			if attr=="decorator":
				return object.__getattribute__(self,'decorator')
			return getattr(object.__getattribute__(self, 'decorator')
().getParent(), attr)
		dct = {}
		dct['__init__'] = __init__
		dct['decorator'] = decorator
		dct['__getattribute__'] = __getattribute__

		return type.__new__(cls, name, bases, dct)

class Decorator(object):
	__metaclass__ = DecoratorType

class HBar(Decorator):
	def __init__(self, number):
		Decorator.__init__(self)
		self._number = number
	def inc(self):
		self._number += 1
	def p(self):
		print self._number

hbar = HBar(10)
for each in dir(hbar.decorator()):
	print each

hbar.decorator().p()
hbar.decorator().inc()
hbar.decorator().p()
-------------------------------------------------------
Unfortunately this does not work. The newly defined __init__ method
inside __new__, does a call to impl(*args, **dargs). However, since
the HBar.__init__ calls the Decorator.__init__ method, but the
HBar.__init__ method no longer resides inside HBar, but rather inside
HBarImpl (which is no longer a subtype of Decorator), the compiler
complains that Decorator.__init__ is not being called with a Decorator
instance as its first argument (which is true).
I tried changing the definition of impl inside __new__ to have
Decorator as one of its bases, but then for some reason impl(*args,
**dargs) asks for 4 arguments (just like __new__) and I have no clue
as to why that happens.

Any help on this?

Regards,
Thomas K.


From jr9445 at ATT.COM  Thu May 15 12:11:27 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Thu, 15 May 2008 11:11:27 -0500
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>

> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of globalrev
> Sent: Thursday, May 15, 2008 12:04 PM
> To: python-list at python.org
> Subject: exists=false, but no complaint when i open it!?
> 
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
> 
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()
> 
> exists returns false but when i open it doesnt complain. how come?
> 
> another file that exists returned false for complained when i tried to
> open it.
> --


You're falling victim to string interpolation because of the
backslashes.  (\n == newline, \N == N).

Try using a raw string r'filename', instead of 'filename':
	print
os.path.exists(r'C:\Users\saftarn\Desktop\NetFlixDataSet\trainingsetunzi
pped\training_set\mv_0000001.txt')


*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA621




From sjmachin at lexicon.net  Fri May  9 21:39:59 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 01:39:59 GMT
Subject: regexp help
In-Reply-To: <ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
Message-ID: <4824fcec$1@news.mel.dft.com.au>

globalrev wrote:
> ty. that was the decrypt function. i am slo writing an encrypt
> function.
> 
> def encrypt(phrase):
>     pattern =
> re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")

The inner pair of () are not necessary.

>     return pattern.sub(r"1\o\1", phrase)
> 
> doesnt work though, h becomes 1\\oh.

To be precise, "h" becomes "1\\oh", which is the same as r"1\oh". There 
is only one backslash in the result.

It's doing exactly what you told it to do: replace each consonant by
(1) the character '1'
(2) a backslash
(3) the character 'o'
(4) the consonant

> 
> 
> def encrypt(phrase):
>     pattern =
> re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
>     return pattern.sub(r"o\1", phrase)
> 
> returns oh.

It's doing exactly what you told it to do: replace each consonant by
(1) the character 'o'
(2) the consonant

> i want hoh.

So tell it to do that:
return pattern.sub(r"\1o\1", phrase)

> i dont quite get it.why cant i delimit pattern with \

Perhaps you could explain what you mean by "delimit pattern with \".



From paul at boddie.org.uk  Wed May 21 07:30:14 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 21 May 2008 04:30:14 -0700 (PDT)
Subject: Minimal Python installation?
References: <g10s8k$lgb$1@aioe.org>
Message-ID: <a45bd618-dc47-4331-b9bb-1a54db834ca0@j22g2000hsf.googlegroups.com>

On 21 Mai, 12:07, Thomas Troeger <thomas.troeger.... at siemens.com>
wrote:
>
> I'd like to put the python library and interpreter on a small embedded
> Linux x86 compatible device where disk space is an issue. I played
> around with the minimal Python interpreters, but was not entirely happy
> with them, so my question is, is there an (preferably easy) way to put
> the interpreter and a cut-down version of the python library/modules
> that ship with regular Python into a new archive that I can safely copy
> and use?

Perhaps there are some projects on the following pages which may help
in some way:

http://wiki.python.org/moin/EmbeddedPython
http://wiki.python.org/moin/Tiny_Python

[...]

> Let's say I want a complete Python install, but without all the batteries :-)

I think there's an overlap between "installer" tools and some of the
projects mentioned on the above pages, especially where retaining only
the critical libraries in the resulting distribution is concerned.

Paul


From bcb at undisclosedlocation.net  Wed May  7 19:53:42 2008
From: bcb at undisclosedlocation.net (Bruce C. Baker)
Date: Wed, 7 May 2008 18:53:42 -0500
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <5irUj.71335$y05.1766@newsfe22.lga>


<xahlee at gmail.com> wrote in message 
news:f4abdb41-be28-4628-a2ad-7fb6cea6ed65 at u12g2000prd.googlegroups.com...

[...]

(for example, Perl's naming heavily relies on unix culture (grep,
pipe, hash...), ...

"hash" + "pipe"? Ahhhhh, /no wonder/ Perl is the syntactic mishmash it is! 
;-)





From tjreedy at udel.edu  Sat May 10 20:00:30 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 20:00:30 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <g05cut$sjc$1@ger.gmane.org>


<wxPythoner at gmail.com> wrote in message 
news:f6743b81-9324-46dd-bbd3-ef8812e28197 at d77g2000hsb.googlegroups.com...
|I am stunned that this simple misunderstanding of mine ended in a
| mathematical clash of a sort. :)  You guys really blew me away wih
| your mathematical knowledge. And also the 0**0 is a thing I've never
| thought about trying, until now that is.

Anyone who defines a function should think about 'edge' and 'corner' cases.
Recursive definitions often help, since such cases are typically the base 
cases.
When learning a (computer) function, I often test such cases since they are 
a common place to mess up.

tjr





From __peter__ at web.de  Sun May 18 08:11:34 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 May 2008 14:11:34 +0200
Subject: Error when calling superclass __init__ method
References: <a371b239-b22f-4f8c-b34c-b0f6e061add7@24g2000hsh.googlegroups.com>
Message-ID: <g0p6dj$tg2$00$1@news.t-online.com>

Maese Fernando wrote:

> I'm getting an odd error while trying to call the __init__ method of a
> super class:
> 
> BaseField.__init__(self)
> TypeError: unbound method __init__() must be called with BaseField
> instance as first argument (got nothing instead)
> 
> 
> This is the code:

No, it isn't. Please provide the actual code or, better, a minimal
example. Don't forget to run it to verify it shows the behaviour described
above before you post it.

> What am I doing wrong?

My bets are on

BaseField.__init__() # no self

Peter


From mr.edel at gmx.at  Wed May 28 09:42:22 2008
From: mr.edel at gmx.at (Matt)
Date: Wed, 28 May 2008 13:42:22 +0000
Subject: ctypes, function pointers and a lot of trouble
Message-ID: <g1jnfq$6s9$1@aioe.org>

Hi friends,

Okay so well, I have quite a problem right now with a file stream. What 
I am doing is to use the Cannon SDK dlls to get control over my old 
Cannon A60 Camera for some surveillance useage.

By using ctypes it all worked well until now. I am able to load the 
dlls, use a lot of functions, am able to connect to the camera, read out 
some params, send commands etc... but now I am stuck with reading the 
picture data.

In C the code looks as follows (found in an supplemental *.h SDK file:

------------------------------CODE-----------------------------------------

#define cdSTDCALL __stdcall

typedef void    cdSTDCALL cdSOpen(cdContext contextH, cdPermission, 
cdError* err);
typedef void    cdSTDCALL cdSClose(cdContext contextH, cdError* err);
typedef void    cdSTDCALL cdSRead(cdContext contextH, void* buf, 
cdUInt32* bufsize, cdError* err);
typedef void    cdSTDCALL cdSWrite(cdContext contextH, const void *buf, 
cdUInt32* bufsize, cdError *err);
typedef void    cdSTDCALL cdSSeek(cdContext contextH, cdWhence, cdInt32 
offset, cdError* err);
typedef cdInt32 cdSTDCALL cdSTell(cdContext contextH, cdError* err);
typedef void    cdSTDCALL cdSProgress(cdContext contextH, cdUInt16 
percentDone, cdError* err);

/* cdStream
*/
typedef struct {
    cdContext contextH;
    /* stream I/O function pointers */
    cdSOpen*      open;
    cdSClose*      close;
    cdSRead*      read;
    cdSWrite*      write;
    cdSSeek*      seek;
    cdSTell*      tell;
} cdStream;

/* cdStgMedium
*/
typedef struct {
      cdMemType      Type;   /* Type of the medium (u). */
      union {
       cdChar*      lpszFileName;
       cdStream*   pStream;
       #ifdef   macintosh
       cdFSSpec*   pFSSpec;
       #endif
      }u;                  /* Union of all transfer medium */
} cdStgMedium;

------------------------------\CODE----------------------------------------

and this is the function definition that should give me access to the 
data stream (available via DLL):

------------------------------CODE-----------------------------------------

cdCAPI CDGetReleasedData(
           cdHSource hSource,
           cdProgressCallbackFunction * pCallbackFunc,
           cdContext Context,
           cdProgressOption ProgressOption,
           cdReleaseImageInfo* pInfo,
           cdStgMedium* pStgMedium
);

------------------------------\CODE----------------------------------------

So, since I'm no C-Professional, I can only guess what that code does. 
With some previous commands I tell the camera to make a picture. This 
picture is then automatically moved to the PCs RAM and with the function 
above (CDGetReleasedData) I should be able to access this stream. Now I 
havn't accessed any stream with ctypes yet so I have only a rough idea 
how it could work.

The following are the relevant parts of my code that don't work:

------------------------------CODE-----------------------------------------

# Definitions:

class cdReleaseImageInfo(Structure):
     _fields_ = [("SequenceID", c_uint),
                      ("DataType", c_uint),
                      ("Format", c_ubyte),
                      ("DataSize", c_uint),
                      ("Filename", c_char * 2)]


class cdStream(Structure):
     _fields_ = [("contextH", c_uint),
                      ("open", c_uint),
                      ("close", c_uint),
                      ("read", c_uint),
                      ("write", c_uint),
                      ("seek", c_uint),
                      ("tell", c_uint)]

class memunion(Union):
     _fields_ = [("lpszFileName", c_char),
                      ("pStream", cdStream)]


class cdStgMedium(Structure):
     _fields_ = [("Type", c_uint),
                      ("u", memunion)]




# command:

datainfo = cdReleaseImageInfo()
data = cdStgMedium()
errorcode = cdsdk.CDGetReleasedData(devicehandle, byref(cbfunct), 
c_uint(1), c_uint(1), byref(datainfo), byref(data))

------------------------------\CODE----------------------------------------


The function "cdsdk.CDGetReleasedData" itself gets executed correctly, 
but returns an "Invalid Parameter" errorcode. there's also no useful 
data whereas datainfo gets written correctly. I know that my cdStream 
can't work, facing the C-code, but what'd be the right cdStream class? 
What can I do? Any ideas?

Best regards and thanks,
Matt



From kyosohma at gmail.com  Fri May 23 16:47:21 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:47:21 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com> 
	<57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com>
Message-ID: <a99a78e0-8b94-46f7-a7fd-64350b617236@79g2000hsk.googlegroups.com>

On May 23, 1:44?pm, Gandalf <goldn... at gmail.com> wrote:
> you've been very helpful but still i have only one problem. I wont the
> window not to be close after clicking the X button.
> I wont the program to stay on the toolbar
>
> thanks!

Well then, in your event handler, just don't do anything.

def onClose(self, event):
    pass

or maybe you want to hide the frame?

def onClose(self, event):
    self.frame.Hide()

Just make sure you give the user some other way to close it and in
that handler, you'll need to call self.frame.Destroy().

Alternatively, you can just tell the frame not to create the "X"
button:

self.frame = wx.Frame(None, -1, title="My Frame",
style=wx.SYSTEM_MENU)

However, that makes it pretty annoying to close.

Mike


From yves at zioup.com  Fri May 23 01:29:28 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 05:29:28 GMT
Subject: serach file for regexp, return if found?
References: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>
Message-ID: <YCsZj.158482$rd2.147544@pd7urf3no>

notnorwegian at yahoo.se wrote:
> i want to search a document for a particular regexp and then store
> that regexp to a file.

> but search and match only returns matchobjects(what are those anyway?
> i dont get what to do with them, do they contain true/false,
> stringposition etc?)

> how do i do:
> for rows in file:
>     print regexp.find  ## or something equiavlent

Is this what you are trying to do:

for row in file('/etc/services'):
  if re.match('^ssh', row):
    print row


Yves.
http://www.SollerS.ca



From claird at lairds.us  Mon May 26 13:49:40 2008
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 May 2008 17:49:40 +0000
Subject: Python needn't apologize (was: Using Python for programming
	algorithms)
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<7ENXj.6906$255.106@bignews8.bellsouth.net>
	<71dc01f3-0084-4878-a4f0-5792e2648f77@y21g2000hsf.googlegroups.com>
Message-ID: <kq9rg5-n63.ln1@lairds.us>

In article <71dc01f3-0084-4878-a4f0-5792e2648f77 at y21g2000hsf.googlegroups.com>,
sturlamolden  <sturlamolden at yahoo.no> wrote:
>On May 18, 5:46 am, "inhahe" <inh... at gmail.com> wrote:
>
>> The numbers I heard are that Python is 10-100 times slower than C.
>
>Only true if you use Python as if it was a dialect of Visual Basic. If
>you use the right tool, like NumPy, Python can be fast enough. Also
>note that Python is not slower than any other language (including C)
>if the code is i/o bound. As it turns out, most code is i/o bound,
>even many scientific programs.
>
>In scientific research, CPU time is cheap and time spent programming
>is expensive. Instead of optimizing code that runs too slowly, it is
>often less expensive to use fancier hardware, like parallell
>computers. For Python, we e.g. have mpi4py which gives us access to
>MPI. It can be a good advice to write scientific software
>parallelizable from the start.
			.
		[more of same]
			.
			.
I can hardly overemphasize how often it happens not
just that Python is more than 1% as fast as C, not 
just that Python is fast enough, but that real-world
programs written in Python are FASTER then their
homologs coded in C.



From sarenius at sun3.oulu.fi  Sun May 25 15:25:26 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:25:26 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
Message-ID: <slrng3jf96.hio.sarenius@sun3.oulu.fi>

In article <mailman.1575.1211740436.12834.python-list at python.org>, Tim Golden wrote:
>so it's just possible that one of your filenames has
>a non-ascii char in it without your noticing? (Altho'
>I'd find that an odd character to include in a filename).

There is somewhere since printing worked when I changed the filename
completely.

>To get round the problem in the immediate term, change
>both print lines to something like:
>
>print repr (full_filename)

This did not work. Neither did commenting all print lines. The problem is
somewhere else.

Strange...

The bash script that copies-renames the file for dirwatch.py is here:

http://justin.yackoski.name/winp/winp

I cannot see where they put a non ascii character there. Can you?

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *



From google at mrabarnett.plus.com  Thu May  8 14:04:29 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 8 May 2008 11:04:29 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>

On May 8, 4:34 am, Yves Dorfsman <y... at zioup.com> wrote:
> Miles wrote:
> > On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
> >  >  > Is there a way to do:
> >  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> >  >  > x[0,2:6]
>
> >  >  > That would return:
> >  >  > [0, 3, 4, 5, 6]
>
> Arg... Yes, this is a typo, I meant:
> [1, 3, 4, 5, 6]
>
> >  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
>
> >  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
> >  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)
>
> Yes, exactly.
>
>
>
> >  This isn't incredibly efficient, but it does what you want (I think):
>
> >  from itertools import chain
>
> >  class multisliceable(list):
> >   def __getitem__(self, slices):
> >     if isinstance(slices, (slice, int, long)):
> >       return list.__getitem__(self, slices)
> >     else:
> >       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
> >                           else [list.__getitem__(self, s)] for s in slices]))
>
> >  p = open('/etc/passwd')
> >  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]
>
> So would it be a worthy addition to python, to add it right in the core of
> the language, and hopefully in an efficient manner ?
>
> That would certainly help some type of list comprehensions, making them more
> readable, and hopefully more readable (running split once instead of twice,
> or how many number of time you need it). The passwd example is just one
> example I ran into, but I can see running in this problem a lot with more
> complex cases. Right now I solve the passwd pb with:
>
> p = file('/etc/passwd').readlines()
> r = [ e.strip().split(':') for e in p ]
> s = [  e[0:1] + e[2:]   for e in r ]
>
> Or:
>
> p = file('/etc/passwd').readlines()
> s = [  e.strip().split(':')[0:1] + e.strip().split(':')[2:]   for e in p ]
>
> In the first case we're looping twice (two list comprehension), in the
> second case we're running the split twice on every element of p.
>
You should've read the thread entitled "Why don't generators execute
until first yield?"! :-) Michael Torrie gave the URL
http://www.dabeaz.com/generators/Generators.pdf. Your example can be
rewritten as follows:

p = file('/etc/passwd') # No need for readlines() because file's
iterator yields the lines.
r = ( e.strip().split(':') for e in p ) # A generator expression
instead of a list comprehension.
s = [  e[0:1] + e[2:]   for e in r ]


From deets at nospam.web.de  Sun May 25 07:42:59 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:42:59 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <g19q1l$pd5$01$1@news.t-online.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
Message-ID: <69t1m5F33b3ncU2@mid.uni-berlin.de>

Sebastian 'lunar' Wiesner schrieb:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> [ Diez B. Roggisch <deets at nospam.web.de> ]
>>> I finally managed to work with static files with a little hack, but it's
>>> ugly because I'm reading each static file per request.
>> How else should that work? Apache does that the same way.
> 
> I guess, Apache does some kind of memory caching for files, which are often
> requested and small enough to fit into the system memory.  May be, that's
> what the OP is referring to ...

I'm not aware of that, and I even more seriously doubt it. Because 
caching is a complicated, domain-dependend subject that would 
*immediately* cry for configuration - e.g. caching strategies and such.

And a common idiom for apache & caching is to use Squid as reverse 
proxy. Which wouldn't be the case would apache cache by itself.

Diez


From daveparker at flamingthunder.com  Thu May 29 19:11:07 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Thu, 29 May 2008 16:11:07 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org> 
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
Message-ID: <f87fa170-7b96-4c1b-8a6f-04bb5c2a2d5b@f24g2000prh.googlegroups.com>

Dan Upton wrote:
> I just think if you're shooting for an easily understandable
> language, overloading error handling requires more thought on the
> programmer's part, not less, because they have to reason about all
> outcomes

Duncan Booth wrote:
> Maybe FT should do something similar:
>    Writeline value of (set x to "hello world". Result is x.).

I like the "value of" syntax.  You guys have convinced me to
reconsider overloading the error handling.  Thank you both.


From malaclypse2 at gmail.com  Thu May  8 22:31:06 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 8 May 2008 22:31:06 -0400
Subject: anagram finder / dict mapping question
In-Reply-To: <16651e80805081930o6a240199q69dd1c3e469d45c1@mail.gmail.com>
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
	<16651e80805081930o6a240199q69dd1c3e469d45c1@mail.gmail.com>
Message-ID: <16651e80805081931i7fd43798t47bc8fe977b23a67@mail.gmail.com>

On Thu, May 8, 2008 at 7:52 PM, dave <squareswallower at 1ya2hoo3.net> wrote:
 >  I got it!  Thanks for all your help!!!  Please tell me what you think:

 Here's yet another version of the same thing, using defaultdicts and
 sets.  This way we don't have to test for membership in either the
 dictionary or the collection of anagrams.  The code is shorter, but no
 less readable in my opinion.

 from collections import defaultdict

 def anafind(words):
    """
    Given a sequence of words, return a dictionary with groups
    of letters as keys and sets of anagrams as values
    """
    anagrams = defaultdict(set)
    for word in words:
        key = ''.join(sorted(word))
        anagrams[key].add(word)
    return anagrams

 if __name__ == "__main__":
    wordlist = ['live', 'evil', 'one', 'nose', 'vile', 'neo']
    anagrams = anafind(wordlist)
    for letters, words in anagrams.items():
        print "%s: %s" % (letters, words)

 --
 Jerry


From flossy at bobbsey_twins.com  Sat May 10 23:23:53 2008
From: flossy at bobbsey_twins.com (MooJoo)
Date: Sat, 10 May 2008 20:23:53 -0700
Subject: Prettyprinting SQL statements
Message-ID: <flossy-5582CC.20235310052008@comcast.dca.giganews.com>

I'm building a Python app that will be making queries to a MySQL server 
using the MySQLdb module. The app will need to create SQL statements on 
the fly which, in addition to going to the server, will occasionally 
need to be displayed to the user. While these queries are not too 
complex, they still can be difficult to decipher without doing some 
formatting. I've done the requisite Googling to see if a library to 
format SQL can be found but, other than commericial Windows apps and 
some on-line formatters, I've not found anything remotely usable. Before 
trying to write my own parser/formatter, I was hoping somebody might 
know of a package to perform this function.

Anybody? Ferris? Anybody at all?

Thanks.


From ptmcg at austin.rr.com  Wed May 28 09:45:19 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 28 May 2008 06:45:19 -0700 (PDT)
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com> 
	<mailman.1675.1211954129.12834.python-list@python.org>
	<g1j436$6i8$02$1@news.t-online.com>
Message-ID: <c950e63c-f211-4fc9-bd72-269d9a23862b@m44g2000hsc.googlegroups.com>

On May 28, 3:11?am, Peter Otten <__pete... at web.de> wrote:
> Gary Herron wrote:
> > Alok Kumar wrote:
> >> Dear All,
>
> >> I am using dictionary for filling my xpath parsed data.
>
> >> I wanted to use in the following manner.
>
> >> mydict[index] ["key1"] ["key2"] ? ?#Can someone help me with right
> >> declaration.
>
> >> So that I can fill my XML xpath parsed data
>
> >> mydict[0] ["person"] ["setTime"] = "12:09:30"
> >> mydict[0] ["person"] ["clrTime"] = "22:09:30"
>
> [I didn't see the original post]
>
> >>> from collections import defaultdict
> >>> def make_inner():
>
> ... ? ? return defaultdict(lambda: defaultdict(make_inner))
> ...>>> mydict = make_inner()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
>
<snip>

When this has come up in previous threads, I think this was the best
solution that was proposed:


from collections import defaultdict

class recursivedefaultdict(defaultdict):
    def __init__(self):
        self.default_factory = type(self)


Here is this recursivedefaultdict in action:

data = [
    ('A','B','Z',1),
    ('A','C','Y',2),
    ('A','C','X',3),
    ('B','A','W',4),
    ('B','B','V',5),
    ('B','B','U',6),
    ('B','D','T',7),
    ]

table = recursivedefaultdict()

for k1,k2,k3,v in data:
    table[k1][k2][k3] = v

for kk in sorted(table.keys()):
    print "-",kk
    for jj in sorted(table[kk].keys()):
        print "  -",jj
        for ii in sorted(table[kk][jj].keys()):
            print "    -",ii,table[kk][jj][ii]

Prints:

- A
  - B
    - Z 1
  - C
    - X 3
    - Y 2
- B
  - A
    - W 4
  - B
    - U 6
    - V 5
  - D
    - T 7

-- Paul



From n00m at narod.ru  Mon May  5 07:34:18 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 04:34:18 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
	<fvmov5$o4i$00$1@news.t-online.com>
Message-ID: <95445d33-218f-42de-9412-067229c20830@d45g2000hsc.googlegroups.com>

actually, it's this doesn't work (again, in VBS the "same"
construction works properly):

f = os.popen('osql -E -S(local) -dpubs -w800 -Q"' + query + '"', 'r')

res=f.readlines()

=======
here "query" is a multiline string like:

select getdate()

    select 555*666

select getdate()


From larzluv at hotmail.com  Mon May 12 02:34:08 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 23:34:08 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
Message-ID: <2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>

On May 11, 11:42 pm, Larry Hale <larz... at hotmail.com> wrote:
> THANKS, AGAIN, for the reply!  :)
>
> Okay, now I -really- feel silly...  :>
>
> So, when I was going to try what you'd suggested, I noticed something
> peculiar: I hadn't "changed" anything on my system, but now, when I
> tried to "import magic" I got a missing DLL error.  For a DIFFERENT
> DLL!  This got me to thinking...
>
> Turns out, when I was having "success" earlier, I was -in- the C:
> \Program Files\GnuWin32\bin directory (where file.exe and related .dll
> files are).
>
> So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
> PATH.  Everything worked.  I removed all the copious copies of the
> DLL, the magic files, etc., littering my hard drive in every other
> location.  Still worked.
>
> 'Course, I don't honestly know why it didn't work with the files
> copied to other locales contained in the sys/Py paths... perhaps it
> was, as you mentioned, wanting the tree-structure to be the same?  (I
> haven't the heart to check this out fully right now... *maybe* at a
> later time...  ;) )
>
> Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
> THAT... you know, all the "obvious"/"I've been programming/working in
> computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
> 'hacker'..." stuff.  I -swear-!
>
> [EGG ON FACE]
>
> [SIGH]  Well, I'd say "live and learn", but I'm still scratching my
> head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
> off to work _with_ the module now, then work-up my HowTo (and
> experiment with making an "egg"?? ;) )...
>
> Caio!
> -Larry  :P  :)
>
> On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
>
> > Larry Hale wrote:
> > > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > > file... still no-go.  :/
>
> > It's often the custom of programs ported from unix to windows to use the
> > dll location as a key to find the other files that are typically in
> > share, or etc.  GTK, for example uses ../share and ../etc from the
> > location where the dlls are stored (if the dlls are in a folder called bin).
>
> > In this case I'd try making a folder in the Python25 folder called
> > "share" and put the contents of the gnuwin32 share/file stuff in there.
> >  Should look something like this:
>
> > c:/python25/share/file/magic.mime.mgc
> > c:/python25/share/file/magic
> > c:/python25/share/file/magic.mgc
> > c:/python25/share/file/magic.mime
>
> > Or, judging by a string I found in the dll itself, you might have to put
> > the files here:
>
> > c:/progra~1/File/share/file/magic
>
> > Although if such a path really is hardcoded into the dll, this is
> > certainly a bug, since it will fail on certain non-english windows systems.
>
> > Anyway, who knows.  Give these options a try.



UPDATE: HOORAY!!!  Well, actually, was about two steps forward, one
back.  But I've gotten it all sorted out now!  :)

I added C:\Program Files\GnuWin32\bin to the system/Windows PATH.
This takes care of the various required DLLs/libs.

The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
has the man pages.  I'd overlooked these as they were only modified as
necessary; the "BSD" part made me think they'd be the same as the same
online versions I'd already read (that were *nix specific).
Obviously, I was wrong.  These had the default paths to the magic*
files listed; C:\Program Files\File\share\file\.

If one creates said directory structure and moves/copies/unpacks the
magic ("database") files THERE, then one may do:

    >>> import magic
    >>> test = magic.Magic() # <-- New Magic class instance
    >>> test.from_file( 'C:\\startrek.exe' ) # <-- Yeah, I have an old
Star Trek game file here to test with...  :)
    'MS-DOS executable, MZ for MS-DOS'  # <-- This is what's
returned...

Alternately, if one wishes to leave/place the magic files elsewhere,
do like:

    >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
\share\\file\\magic' ) # <-- spec where/what the file is

NOTE: Even if the "magic_file" location *is* specified, "mime = True"
still works fine.  (Haven't checked, but I presume the source simply
tacks ".mime" to the filename automagically.)  Obviously/also, one
needn't specify the argument names if one uses proper argument order:
magic.Magic( mime, magic_file )  :)


THANKS SO MUCH, Michael, for your answers and helping me alone the
way...  :)


Cheers,
-Larry


From martin at v.loewis.de  Sat May 10 15:23:24 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 21:23:24 +0200
Subject: Is there a PyPI API?
In-Reply-To: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>
References: <7acaec98-73ca-436c-b153-4d34599a5f0c@8g2000hse.googlegroups.com>
Message-ID: <4825F62C.9050407@v.loewis.de>

> I just can't figure out how to get the metadata, I guess.

See

http://wiki.python.org/moin/PyPiXmlRpc

Regards,
Martin


From mwolffedu at gmail.com  Fri May 16 16:16:24 2008
From: mwolffedu at gmail.com (lampshade)
Date: Fri, 16 May 2008 13:16:24 -0700 (PDT)
Subject: Arch problems--how do I build PIL to be 64 bit so it plays nicely on 
	OS X?
Message-ID: <d94878c8-3ea1-4da0-9515-9a8aa7f8210e@x41g2000hsb.googlegroups.com>

Hello,

I'm using python + django to do some web design and I would really
like to use the python image library as part of this.  There seems to
be a problem, however, with apache and mod_python being 64 bit while
my python image library(PIL) is only 32 bit.

Does anyone have experience with building the correct architectures so
that OS X 10.5 plays nicely?  I think, when it comes down to it, I
just need PIL at this point to be x86_64 so that it plays with apache
and mod_python.

Any advice, hand-holding, or sage wisdom?


From marlin_rowley at hotmail.com  Fri May 16 19:21:37 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:21:37 -0500
Subject: Rearranging elements (cont..)
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W39883617665A699328FB649FC80@phx.gbl>

All:
 
Say I have an array:
 
a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
 
How do I make it so that I now have:
 
starting with first element (a[0])
new_arr[0] = 'r'
new_arr[1] = 'g'
new_arr[2] = 'b'
new_arr[3] = 'a'
new_arr[4] = 'r'
.....
 
continuing "through" a[1] with the same new_arr
new_arr[N] = 'r'
new_arr[N+1] = 'g'
....
 
-M
 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From badmuthahubbard at gmail.com  Tue May 20 09:19:17 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 20 May 2008 16:19:17 +0300
Subject: What is wrong with my Python threading?
Message-ID: <8200bab70805200619o21f8b971ob6d3bb359f9080aa@mail.gmail.com>

#!/usr/bin/python

#why doesn't this run both threads simultaneously?
#Thanks for any help.
#Chuckk

import threading
import time

def printesc(thrd):
    for i in range(10):
        time.sleep(1)
        print thrd, i

def master():
    thd1 = threading.Thread(target=printesc, args=(1,))
    thd2 = threading.Thread(target=printesc, args=(2,))
    thd1.run()
    thd2.run()

master()


From gagsl-py2 at yahoo.com.ar  Tue May 27 22:08:07 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 23:08:07 -0300
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
Message-ID: <op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 14:43:52 -0300, Ian Kelly <ian.g.kelly at gmail.com>  
escribi?:

> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

filter returns a newly created list, so this code is as wasteful as a list  
comprehension (and harder to read).

-- 
Gabriel Genellina



From castironpi at gmail.com  Wed May 14 14:07:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:07:37 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>
Message-ID: <4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com>

On May 14, 1:06?pm, castiro... at gmail.com wrote:
> On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > you can safely ignore its posts.
>
> > > > > > > How does it generate text?
>
> > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > However you know what would be helpful? ?If I could go to the right
> > > > > place to start the ring.
>
> > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > I'd stay on mutability for the world domination factor. ?Fluent
> > > currency is buoyant currency; turn on a local clock, and someone gets
> > > some cubic verticals.
>
> > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > can pretty well win work.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have a self-referential on Pygame: it's a Hand Tool object.
> > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > - Show quoted text -
>
> If Python can plot in to chess, and Tron rings live, then why not
> group it knew?- Hide quoted text -
>
> - Show quoted text -

That would be know.  Plot and split in too.


From dickinsm at gmail.com  Thu May 22 11:23:43 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 08:23:43 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com> 
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com> 
	<g13d7u$5gn$1@rumours.uwaterloo.ca>
Message-ID: <0afa8161-cc8e-4f2a-b4fb-7f2cea997fb7@59g2000hsb.googlegroups.com>

On May 22, 5:09?am, Ross Ridge <rri... at caffeine.csclub.uwaterloo.ca>
wrote:
> Henrique Dante de Almeida ?<hda... at gmail.com> wrote:
>
> > Finally (and the answer is obvious). 387 breaks the standards and
> >doesn't use IEEE double precision when requested to do so.
>
> Actually, the 80387 and the '87 FPU in all other IA-32 processors
> do use IEEE 745 double-precision arithmetic when requested to do so.
> The problem is that GCC doesn't request that it do so. ?It's a long
> standing problem with GCC that will probably never be fixed. ?You can
> work around this problem the way the Microsoft C/C++ compiler does
> by requesting that the FPU always use double-precision arithmetic.

Even this isn't a perfect solution, though: for one thing, you can
only
change the precision used for rounding, but not the exponent range,
which remains the same as for extended precision.  Which means you
still don't get strict IEEE 754 compliance when working with very
large or very small numbers.  In practice, I guess it's fairly
easy to avoid the extremes of the exponent range, so this seems like
a workable fix.

More seriously, it looks as though libm (and hence the Python
math module) might need the extended precision: on my machine
there's a line in /usr/include/fpu_control.h that says

#define _FPU_EXTENDED 0x300     /* libm requires double extended
precision.  */

Mark


From benjamin.fremiot at gmail.com  Mon May 12 09:13:25 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 06:13:25 -0700 (PDT)
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
	<48282e92$0$14346$e4fe514c@news.xs4all.nl>
Message-ID: <ea288f51-f765-4086-9541-7aae9faa1ae6@24g2000hsh.googlegroups.com>

On May 12, 1:48?pm, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:
> Gruik wrote:
> > But before that 1 question: what if I'm in Python ?
> > Following your solution, I did that in Python :
>
> > ? ? def load_buffer(buffer) :
> > ? ? ? ? compiled_buffer = compile(buffer, "module_name", "exec")
> > ? ? ? ? exec(compiled_buffer)
>
> > It works great except that I can't have a module object and that it is
> > as if I did "from module import *"
> > But I need the module object and not an "import *" behavior.
> > Any idea about the way to do that?
>
> Something along the lines of:
>
> import new
> mymodule = new.module("mymodule")
> exec <<<code>>> in mymodule.__dict__
>
> --irmen

Yeah it works !

    exec(compiled_module, globals(), mymodule.__dict__)

Just to add mymodule to sys.modules and it's good!

Thanks again
Benjamin


From wxPythoner at gmail.com  Thu May  8 18:54:42 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Thu, 8 May 2008 15:54:42 -0700 (PDT)
Subject: Mathematics in Python are not correct
Message-ID: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>

Have a look at this:

>>> -123**0
-1


The result is not correct, because every number (positive or negative)
raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).

The problem is that Python parses -123**0 as -(123**0), not as
(-123)**0.

I suggest making the Python parser omit the negative sign if a
negative number is raised to the power of 0. That way the result will
always be a positive 1, which is the mathematically correct result.

This is a rare case when the parser is fooled, but it must be fixed in
order to produce the correct mathematical result.


From ivan.illarionov at gmail.com  Sat May  3 20:08:17 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 4 May 2008 00:08:17 +0000 (UTC)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
	<fvitsq$15ti$3@news.mtu.ru>
	<d2dca1d3-9a41-4862-a695-ba2fbf93e6a6@h1g2000prh.googlegroups.com>
Message-ID: <fviuph$17k7$1@news.mtu.ru>

On Sat, 03 May 2008 17:01:44 -0700, darkblueB wrote:

> On May 3, 4:52?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> Try run 'python setup.py build_ext -f' to force setup.py to rebuild
>> everything with JPEG. And 'sudo python setup.py install' should install
>> PIL with JPEG support.
> 
> yes, that works
> 
> (the self test still gives misleading results ?) but running some sample
> program works fine
> 
> thanks

You're welcome. To make self test inside source directory work you 
probably should rebuild it inplace too.
python setup.py build_ext -f -i


From gagsl-py2 at yahoo.com.ar  Tue May 27 11:32:26 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 12:32:26 -0300
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
Message-ID: <op.ubtj4ck4x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 02:43:53 -0300, sebastian.noack at googlemail.com  
<sebastian.noack at googlemail.com> escribi?:

> On May 27, 2:17 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> It's not a bug, you must extract the StringIO contents *after* closing
>> tar_file, else you won't get the last blocks pending to be written.
>
> I looked at tarfile's source code last night after I wrote this
> message and figured it out. But the problem is that TarFile's close
> method closes the underlying file object after the last block is
> written and when you close StringIO you can not get its content
> anymore. Wtf does it close the underlying file? There is absolute no
> reason for doing this. Are you still sure this isn't a bug?

Ouch, sorry, I only tried with gzip (and worked fine), not bz2 (which is  
buggy).

-- 
Gabriel Genellina



From hdante at gmail.com  Tue May  6 14:00:16 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 11:00:16 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com> 
	<2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com>
Message-ID: <2523ca17-c534-44b9-8db7-543a794dc213@e39g2000hsf.googlegroups.com>

On May 6, 12:28?am, castiro... at gmail.com wrote:
>
> There's a process decorator to functions in a module.
>
> [supposes]
>
> @process
> def datafile( processdict ):
> ? ?processdict.modify( )
> ? ?op= yield
> ? ?op.call( ) in processdict
> ? ?# op.call( ) in namespace
>
> More simply:
>
> @process
> def datafile( processdict ):
> ? ?processdict.modify( )
> ? ?interaction_object= yield
> ? ?invoke( interaction_object, processdict )
> ? ?#or interaction_object.invoke( **processdict )
> ? ?processdict.commit( )
>
> Making each execution of process a self-modifying disk file.
> Interaction_object could be binary or text. ?If text, we'd have a
> cross-language executable, but I'm suspicious it wouldn't be vacuous
> as a Python of Python composition: would other languages pass other
> than Python programs?
>
> I think relational databases are the only in there. ?In other words, I
> think Python would make a wholly better stored procedure and query
> language than those of databases. ?Certainly I'm suspicious that's
> naivete speaking up; I question, would it? ?Is there more risk of or
> opportunity for malicious execution? ?Simply put, can we get
> primitives in to databases? ?What's an example of a [optionally real]
> operation on the primitives that doesn't map pretty well into SQL?
> How do you want to write base-case scenarios if they're going to be
> literals?

 Datafiles could be implemented with SQL. Consider SQL:

 SELECT * FROM process_dict where id = 1
 .
 SELECT * FROM process_dict where id = 1

 Obviously, this is all a supposition, I'm not claiming the code is
perfect (or am I ?). If datafiles could be implemented with SQL and
storing text requires datafiles, then I can store text with datafiles
(haha !). Would you consider doing this ? One could even store python
decorated serialized code using SQL [supposition]. But would it be
useful [haha !] ?

 I don't know.


From littlesweetmelon at gmail.com  Fri May 16 04:46:40 2008
From: littlesweetmelon at gmail.com (=?GB2312?B?zPC5zw==?=)
Date: Fri, 16 May 2008 16:46:40 +0800
Subject: Instance of class "object"
Message-ID: <cdb837ea0805160146vff6290fid5db21a82deb47b3@mail.gmail.com>

Howdy,
    I wonder why below does not work.

a = object()
a.b = 1        # dynamic bind attribute failed...

To make it correct, we have to create a new class:
class MyClass(object): pass
a = MyClass()
a.b = 1       # OK

Does this strange behavior break the LSP (Liskov substitution principle)?

    Regards,
--
ShenLei


From wuwei23 at gmail.com  Tue May 27 04:15:40 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 01:15:40 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
Message-ID: <31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com>

On May 27, 5:47 pm, Sverker Nilsson <s... at sncs.se> wrote:
> Dont make they functions. Or is this just to throw us out?

Have you even bothered to read the reasoning for this change since the
last time you got your knickers twisted over it?

http://www.python.org/dev/peps/pep-3105/#rationale

I don't see "piss everyone off" listed there anywhere.

Personally, I believe if you're writing code of any serious length,
you generally shouldn't be using 'print' anyway, using the logging
module allows for a lot more flexibility.

If you're bothered by having to type the parentheses while in the
interpreter, try using IPython with it's autocall mode turned on.


From daveparker at flamingthunder.com  Wed May 21 15:34:36 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 12:34:36 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com>
Message-ID: <afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com>

On May 21, 1:14?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> I wonder whether "is" could be used both for "x is value" and "x is a
> type" without causing a problem:
>
> If command is a string ...
>
> If command is "quit" ...

I think you are right.  I like "If command is "quit" ...".  For a user
who wasn't mathemetically inclined and was doing mainly string
manipulation, I think it might be easier to read than the equivalent
"If command = "quit" ...".  By making them exactly equivalent, I can't
think of any confusion that might induce bugs.  If you think of any
drawbacks, please let me know.  Otherwise, I'll put it in the next
time I update the parser (probably this weekend).  Thank you again for
your suggestions.


From giraffeboy at gmail.com  Wed May 21 09:22:02 2008
From: giraffeboy at gmail.com (giraffeboy at gmail.com)
Date: Wed, 21 May 2008 06:22:02 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
Message-ID: <4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>

On May 21, 1:49 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:

> Did you remember to commit your changes before re-running the report?
> Python's DB API requires that any auto-commit feature of the
> underlying database be turned off by default, so you are required to
> commit changes yourself.  If you're used to having auto-commit turned
> on, this can be confusing.

I did and I confirmed this by modifying the data, selecting it from
the mysql command line client to verify the changes, then running the
report again. If I exit the application and then start it again,
everything works as expected until the second instance of the report
is run. I have a feeling it has something to do with there already
being an instance of the report class, but I can't work out how to
destroy it and aren't really sure how to remove the references to it
either. I added a print statement to the code and it displays a row
that doesn't exist any more. Code, output of print statement and
result from the mysql client shown below.

Andrew


Code:
#Get all the mileages and add them together for the month:
curs.execute('SELECT date, mileage, name FROM mileage, agents WHERE
mileage.agent = agent.rowid AND date >= CAST(%s AS DATE) AND date <
CAST(%s AS DATE) AND mileage.agent=%s ORDER BY date', (fromdate,
todate, agentid))
for row in curs:
   month = str(row[0])[:7]
   print row[1], month

Output:
100.0 2008-03

MySQL Output just prior to running the report:
mysql> select * from mileage;
+-------+------------+---------+---------+-------+
| rowid | date       | mileage | vehicle | agent |
+-------+------------+---------+---------+-------+
|     1 | 2008-04-28 |  875.63 |       3 | 3     |
|     2 | 2008-04-28 | 1188.13 |       6 | 6     |
|     3 | 2008-04-28 |  676.88 |       4 | 4     |
|     4 | 2008-04-21 | 1111.25 |       6 | 6     |
|     5 | 2008-04-21 | 1126.88 |       3 | 3     |
|     6 | 2008-04-28 | 1029.38 |       7 | 8     |
|     7 | 2008-04-21 |  953.13 |       7 | 8     |
|     8 | 2008-04-21 |  675.63 |       4 | 4     |
|     9 | 2008-04-14 |  891.88 |       3 | 3     |
+-------+------------+---------+---------+-------+
9 rows in set (0.00 sec)

As you can see there's no row with a mileage of 100 with the correct
month.


From terry.yinzhe at gmail.com  Sun May 18 19:42:05 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 16:42:05 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
	<69b0mlF31f0kbU1@mid.uni-berlin.de>
Message-ID: <507f43ce-1513-490b-b4a3-6c501e1a0169@v26g2000prm.googlegroups.com>

On May 18, 11:35 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Terry schrieb:
>
>
>
> > On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> >> escribi?:
>
> >>> Is there a simple way to get all the instances of one class? I mean
> >>> without any additional change to the class.
> >> Try with gc.get_referrers()
>
> >> py> import gc
> >> py> class A(object): pass
> >> ...
> >> py> a,b,c = A(),A(),A()
> >> py> A
> >> <class __main__.A at 0x00A3F4E0>
> >> py> for item in gc.get_referrers(A): print type(item)
> >> ...
> >> <type 'getset_descriptor'>
> >> <type 'getset_descriptor'>
> >> <type 'tuple'>
> >> <class '__main__.A'>
> >> <class '__main__.A'>
> >> <class '__main__.A'>
> >> <type 'dict'>
> >> <type 'dict'>
>
> >> We need to filter that list, keeping only A's instances:
>
> >> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> >> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> >> <__main__.A object at 0x00A40E18>]
>
> >> --
> >> Gabriel Genellina
>
> > But I saw in the help that we should "Avoid using get_referrers() for
> > any purpose other than debugging. "
>
> Yes, because using it do is very resource-consuming and shouldn't be
> done. Why don't you tell us what you are after here & then we might come
> up with a better solution?
>
> Diez

I'm developing a message/state_machine based python program (I'm not
using stackless, plan to move to it later).
I want to collect all the state_machines (threads) and send them
'tick' message or 'quit' message.

Now I'm using a static member to collect the machines, just wonderring
if python already provide something like this.


From deets at nospam.web.de  Mon May  5 11:25:14 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 17:25:14 +0200
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
	<mailman.593.1210000345.12834.python-list@python.org>
Message-ID: <688n7kF2onffkU1@mid.uni-berlin.de>

> directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
> os.path.join(directory)
> 
> Then python can worry about the gritty details, and you don't have to.

Or somewhat neater IMHO:

 
os.path.join('C:','Python25','myPrograms','pygameProgs','dront.mp3')

Diez


From exarkun at divmod.com  Wed May 14 06:20:05 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 06:20:05 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <575bc914-c702-42c1-a6e5-e911e68187b9@c65g2000hsa.googlegroups.com>
Message-ID: <20080514102005.6859.835877135.divmod.quotient.63329@ohm>

On Tue, 13 May 2008 18:20:29 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 14 Mag, 02:56, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
>> Why?  Isn't this why subtraction exists?  If there is a call scheduled to
>> happen at T1 and the current time is T2, then I know that after (T1 - T2)
>> elapses, it will be time to run the call.  Why do I have to do any checks
>> at all?  I just tell select() to wait that long.  Presumably this is just
>> what someone will do if they want to use asyncore with timed calls.  Call
>> asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.
>
>That doesn't work if I decide to schedule one or more calls AFTER the
>loop has started (see: "I already told select what timeout use").
>As far as I've understood by reading the Twisted core what happens is
>that there's a heap of scheduled calls and a loop that keeps calling
>time.time() to check the scheduled functions due to expire soonest.
>I've also proposed a patch for asyncore using the same approach:
>http://bugs.python.org/issue1641

This isn't how it works.  You're misreading the Twisted implementation.  I
don't know how to explain it any more clearly.

Jean-Paul


From regnarg at seznam.cz  Sun May 11 09:17:35 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Sun, 11 May 2008 15:17:35 +0200
Subject: Make Python create a tuple with one element in a clean way
In-Reply-To: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <20080511131735.GA31145@sirius>

Hello,

> so it would be clean if Python would convert anything put into ( ) to
> be a tuple, even if just one value was put in (without having to use
> that ugly looking comma with no value after it).

if it worked that way, it will absolutely mess up Python syntax, because
we mathematicians are used to use parentheses to force explicit operator
precedence, to group expressions, etc.

Should (1+1)*2 yield 4 or (2,2) ?



From ivlenin at gmail.com  Sun May 25 19:30:49 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 23:30:49 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
Message-ID: <JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>

On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> i meant like set[pos], not iterate but access a specific position in the
> set.

If you need to access arbitrary elements, use a list instead of a set 
(but you'll get slower inserts). OTOH, if you just need to be able to get 
the next item from the set, you can use an iterator:

> now i have to do:
> s = toSet.pop()
> toSet.add(s)

i = iter(toSet)

s = i.next()

> if i want to get the url of the next item in a set, how would i do that?
> i can do this with a list:
> 
> def scrapeSitesX(startAddress, toList, listPos): return
> scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> list.
> i can work around that but it doesnt get as elegant.

Do you have to use recursion here? Why not:

for site in toList:
	scrape(site)


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:56:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:56:12 -0300
Subject: Custom Classes?
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
Message-ID: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi  
<victorsubervi at gmail.com> escribi?:

> Okay, trying this again with everything working and no ValueError or any
> other errors, here we go:

> getpic = "getpic" + str(w) + ".py"

Why do you *generate* the getpicNN.py? It contains always the same code,  
why don't you just use a single getpic.py?

> and then surf to:
> http://whatever.url/getpic20.py?id=6&x=1

Why don't you post the error you get instead...? Including the complete  
exception report.

> Also, please re-send the link on how to post good questions to the list.  
> I cannot find it.

Uhm, I don't think there is something specific for this list. There is an  
article from E.S.Raymond "How to ask questions the smart way?" that you  
can find with Google

-- 
Gabriel Genellina



From maxerickson at gmail.com  Mon May 12 09:23:13 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 12 May 2008 13:23:13 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
Message-ID: <Xns9A9C5F7F931E8maxericksongmailcom@80.91.229.13>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> On May 12, 1:30?pm, John Machin <sjmac... at lexicon.net> wrote:
>> Duncan Booth wrote:
> [...]
>> > I think the variant I came up with is a bit clearer:
>>
>> > for i in range(1,101):
>> > ? ?print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else
>> > 'Buzz') or 
>  i
>>
>> More than a bit clearer, IMO. How about
>> ? ? ?print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or
>> i (or perhaps
>> ? ? ?print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz'))
>> or i to save looking up the precedence rules) ?
> 
> Stuff clarity!  How about
> 
> for i in xrange(1, 101):
>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i
> 
> --
> Arnaud
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

With no loop:

i=1
exec"print'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)]or i;i+=1;"*100


max



From kuratkull at kuratkull.com  Mon May 19 05:54:14 2008
From: kuratkull at kuratkull.com (kuratkull at kuratkull.com)
Date: Mon, 19 May 2008 02:54:14 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
Message-ID: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>

Hello,

***************
import urllib2
import re
import string
import sys

url = "http://www.macgyver.com/"
request = urllib2.Request(url)
opener = urllib2.build_opener()
html = opener.open(request).read()

match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)

out = match.findall(html)

print out
**************

I would like to print out string with formatting, but as I read, the
string is made into a raw string when using re.
How could I disable or bypass this?

I googled for an hour and couldn't find a solution.

Thank you in advance.




From Randy.Galbraith at gmail.com  Sat May 10 23:41:00 2008
From: Randy.Galbraith at gmail.com (Randy Galbraith)
Date: Sat, 10 May 2008 20:41:00 -0700 (PDT)
Subject: Compiling Python 2.5.2 on AIX 5.2
References: <0b73e8e5-c301-4823-ac94-42f757456cf1@x19g2000prg.googlegroups.com>
	<mailman.402.1208181700.17997.python-list@python.org>
	<d72454cc-256d-4e24-ae2b-b87dd77c9e0d@c19g2000prf.googlegroups.com>
	<48059DA9.5080900@v.loewis.de>
	<c55ebac2-093c-4639-8fd4-c54df2ecf480@k1g2000prb.googlegroups.com>
	<480c2364$0$26788$9b622d9e@news.freenet.de>
	<e05d2418-89b5-4864-a46b-e27341ec84d9@26g2000hsk.googlegroups.com>
	<480e2bbc$0$24477$9b622d9e@news.freenet.de>
Message-ID: <9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>

On Apr 22, 11:17 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > test test_mmap crashed -- <type 'exceptions.EnvironmentError'>: [Errno
> > 22] Invalid argument
>
> You should run this with -v. This is too little detail to know what
> exactly failed.

Sorry it took so long to get back to you.  At this point, I'm going to
attempt to use python on AIX 5.2 even with the mmap and wait4
failures.  My main requirement running Mercurial SCM, so hopefully the
python binary I have will do the job.

Nonetheless, I wanted to quickly dump out the expanded results you
suggested might help.

Running this:
./python Lib/test/test_mmap.py -v

Resulted in this:
--results--
<type 'mmap.mmap'>
  Position of foo: 1.0 pages
  Length of file: 2.0 pages
  Contents of byte 0: '\x00'
  Contents of first 3 bytes: '\x00\x00\x00'

  Modifying file's content...
  Contents of byte 0: '3'
  Contents of first 3 bytes: '3\x00\x00'
  Contents of second page: '\x00foobar\x00'
  Regex match on mmap (page start, length of match): 1.0 6
  Seek to zeroth byte
  Seek to 42nd byte
  Seek to last byte
  Try to seek to negative position...
  Try to seek beyond end of mmap...
  Try to seek to negative position...
  Attempting resize()
  Creating 10 byte test data file.
  Opening mmap with access=ACCESS_READ
  Ensuring that readonly mmap can't be slice assigned.
  Ensuring that readonly mmap can't be item assigned.
  Ensuring that readonly mmap can't be write() to.
  Ensuring that readonly mmap can't be write_byte() to.
  Ensuring that readonly mmap can't be resized.
  Opening mmap with size too big
  Opening mmap with access=ACCESS_WRITE
  Modifying write-through memory map.
  Opening mmap with access=ACCESS_COPY
  Modifying copy-on-write memory map.
Traceback (most recent call last):
  File "Lib/test/test_mmap.py", line 393, in <module>
    test_both()
  File "Lib/test/test_mmap.py", line 247, in test_both
    m.flush()
EnvironmentError: [Errno 22] Invalid argument
--end results--

btw I'm not sure if -v was required in this direct run.  Running w/o -
v gave the same results.

Now, over to wait4.  Your comment was:

> That suggests a bug in wait4: apparently, it fails to correctly return
> the PID. Could be an OS bug, but more likely, it's a type problem in
> Modules/posixmodule.c.

Running this:
./python Lib/test/test_wait4.py

Resulted in this:
--results--
test_wait (__main__.Wait4Test) ... FAIL

======================================================================
FAIL: test_wait (__main__.Wait4Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/..<snip>../Python-2.5.2/Lib/test/fork_wait.py", line 75, in
test_wait
    self.wait_impl(cpid)
  File "Lib/test/test_wait4.py", line 28, in wait_impl
    self.assertEqual(spid, cpid)
AssertionError: 0 != 8417358

----------------------------------------------------------------------
Ran 1 test in 12.066s

FAILED (failures=1)
Traceback (most recent call last):
  File "Lib/test/test_wait4.py", line 37, in <module>
    test_main()
  File "Lib/test/test_wait4.py", line 33, in test_main
    run_unittest(Wait4Test)
  File "/..<snip>../Python-2.5.2/Lib/test/test_support.py", line 451,
in run_unittest
    run_suite(suite, testclass)
  File "/..<snip>../Python-2.5.2/Lib/test/test_support.py", line 436,
in run_suite
    raise TestFailed(err)
test.test_support.TestFailed: Traceback (most recent call last):
  File "/..<snip>../Python-2.5.2/Lib/test/fork_wait.py", line 75, in
test_wait
    self.wait_impl(cpid)
  File "Lib/test/test_wait4.py", line 28, in wait_impl
    self.assertEqual(spid, cpid)
AssertionError: 0 != 8417358
--end results--

Thanks for taking your time to respond.  It is truly appreciated at
this end.

Kind regards,
-Randy Galbraith


From jeffober at gmail.com  Thu May  1 15:31:20 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 12:31:20 -0700 (PDT)
Subject: data manipulation
References: <083cef9c-6bfe-4a1f-afc0-7384c043dc6d@u12g2000prd.googlegroups.com>
Message-ID: <6cb58c7d-33cb-4969-a8f5-55d285688306@k37g2000hsf.googlegroups.com>

The function expects an excel file.  It cannot read a plain text
file.  You would need to figure out a way to convert the text file
data into an excel format and save it to a new file first.

The proper way to handle this is to make your data processing
functions expect a defined format.  Then, you write importer functions
for various types of files that convert the data in each file to the
defined format.  That way, you can support various file formats and
reuse your processing functions on all of them.


From aspersieman at gmail.com  Thu May  8 08:53:10 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:53:10 +0200
Subject: Parsing Email 'References' header.
Message-ID: <4822F7B6.2000403@gmail.com>

Hi

I have a python script that parses email headers to extract information 
from them. I need to get the _last_ messageid in the 'References' field 
(http://cr.yp.to/immhf/thread.html) to create a threaded view of these 
emails (these messageid's are stored in a database).

Now, I can easily access the 'References' field using the python 'email' 
module, but I need a regular expression to get the last messageid in the 
'References' field.

Here's what I have so far:
<code>
rx_lastmesgid = re.compile(r"(<.+>$)")
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) # 
parentid's value is 
eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
</code>

I need it to return "<5 at mail.gmail.com>"

Can anyone help?

Thanks

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From andre.roberge at gmail.com  Sat May 24 09:22:27 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Sat, 24 May 2008 06:22:27 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>

On May 24, 10:12 am, Roy Smith <r... at panix.com> wrote:
> In article
> <84ff733a-e364-437d-9b5d-d8bb14cc6... at m73g2000hsh.googlegroups.com>,
>  John Roth <johnro... at gmail.com> wrote:
>
> > > Does the following patch has a chance of being introduced in the
> > > standard python distribution?
>
> > I certainly hope not!
>
> I think you're being overly negative here.  Antoon went to the trouble to
> read the sources and post a diff.  At the very least, he deserves a more
> polite response.
>
> But, more than that, I think Antoon's idea has some merit.  I understand
> that the mantra in unit testing is that the tests should be able to be run
> in any order.  Still, it's the job of a library package to make it easy to
> do things, not to enforce policy.  If somebody (for whatever reason) has a
> need to run their tests in a certain order, why is it our job to make it
> hard for them to do that?
>
> In fact, unittest.defaultTestLoader *already* sorts the tests into
> alphabetical order by their name.  So, if somebody wanted to get the tests
> run in order, they could just name their tests "test0001", "test0002", etc.
> In fact, I've done that in the past when I had some (long forgotten) reason
> why I wanted to run a bunch of things in order.  Allowing the tests to be
> sorted by line number order instead of by name just makes it a little
> easier to do the same thing.
>
> If somebody wants that functionality, and is willing to put in the effort
> to write the code to do it, and contribute that back to the community, I
> don't see any reason why it shouldn't be considered.  It would have to be
> done in a way that doesn't change the current behavior (perhaps by shipping
> a subclass of TestLoader which users could use instead of the default).
> I'm not saying that we *need* to include it, just that it's not such a bad
> idea that it deserves responses like "I certainly hope not!"

I totally agree.

I can't relate to anyone that want to oppose a change that would give
more freedom to a programmer.

Andr?


From lists at cheimes.de  Tue May  6 18:54:25 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 00:54:25 +0200
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <4820E1A1.6050406@cheimes.de>

Michael Robertson schrieb:
> I'm having trouble opening a file in linux, whose path has spaces in it.
> 
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
> 
>>>> open('./my test/test.txt')
> Exception

Works for me

>>> open('./my test/test.txt')
<open file './my test/test.txt', mode 'r' at 0xb7dd6a40>

Christian



From bignose+hates-spam at benfinney.id.au  Thu May 15 06:04:16 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 20:04:16 +1000
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
	<482be615$0$10798$426a34cc@news.free.fr>
Message-ID: <87zlqrx4rj.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> May we agree to disagree here - unless we don't ?

Absolutely not, except where not applicable.

-- 
 \       "I always wanted to be somebody. I see now that I should have |
  `\                              been more specific."  -- Lily Tomlin |
_o__)                                                                  |
Ben Finney


From szrRE at szromanMO.comVE  Sat May 31 14:36:54 2008
From: szrRE at szromanMO.comVE (szr)
Date: Sat, 31 May 2008 11:36:54 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
	<kjv2441a9im6bcistqcav6c87j4024s2pj@4ax.com>
Message-ID: <g1s5s7019mo@news4.newsguy.com>

J?rgen Exner wrote:
> "szr" <szrRE at szromanMO.comVE> wrote:
>> I would rather have the OP comment about that, as he started the
>> thread.
>
> The OP is a very well-known troll who has the habit of spitting out a
> borderline OT article to a bunch of loosly related NGs ever so often
> and then sits back and enjoys the complaints and counter-complaints
> of the regulars.

While I agree cross-posting should be chosen more carefully, it seemed 
like a harmless article to me. I did not get the impression he was just 
trolling. There are people who like to post articles they come across 
and maybe want to start a discussion on.

Like I said, this may have been better to put in a more general 
programming group, and that yes, it is kind of OT for specific language 
groups, but I really saw no harm in it (and I saw no one try to redirect 
the discussion to a more general group), and you and anyone else are 
free to ignore the thread. All I ask is you allow people to make up 
their own minds.

-- 
szr 




From rhamph at gmail.com  Tue May 20 14:37:42 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Tue, 20 May 2008 11:37:42 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com><mailman.1361.1211228890.12834.python-list@python.org><4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com><8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com><3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com><20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
	<mailman.1394.1211307004.12834.python-list@python.org>
Message-ID: <f96cb65f-a20c-482c-9e5f-c7d120b16c15@z24g2000prf.googlegroups.com>

On May 20, 12:09 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> Intern() is gone in 3.0

But not gone far:

>>> import sys
>>> sys.intern
<built-in function intern>


From grante at visi.com  Sat May 10 23:36:36 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 10 May 2008 22:36:36 -0500
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
Message-ID: <gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi>

On 2008-05-11, John Machin <sjmachin at lexicon.net> wrote:

>> "Write a program that prints the numbers from 1 to 100. But for
>> multiples of three print "Fizz" instead of the number and for the
>> multiples of five print "Buzz". For numbers which are multiples of
>> both three and five print "FizzBuzz".
>> 
>> for i in range(1,101):
>>     if i%3 == 0 and i%5 != 0:
>>         print "Fizz"
>>     elif i%5 == 0 and i%3 != 0:
>>         print "Buzz"
>>     elif i%5 == 0 and i%3 == 0:
>>         print "FizzBuzz"
>>     else:
>>         print i
>> 
>> 
>> is there a better way than my solution? is mine ok?
>
> Try doing it using %3 and %5 only once each.

for i in xrange(101):
    print (("","Fizz")[i%3==0] + ("","Buzz")[i%5==0]) or str(i)

His is better though, since it's more obvious what's intended.

Here's one that's less opaque

for i in xrange(101):
    s = ""
    if i%3 == 0: s += "Fizz"
    if i%5 == 0: s += "Buzz"
    if s:
        print s
    else:
        print i
        
There are dozens of other ways to do it.
-- 
Grant Edwards                   grante             Yow!  ... or were you
                                  at               driving the PONTIAC that
                               visi.com            HONKED at me in MIAMI last
                                                   Tuesday?


From pDOTpagel at helmholtz-muenchen.de  Fri May 30 11:03:40 2008
From: pDOTpagel at helmholtz-muenchen.de (Philipp Pagel)
Date: Fri, 30 May 2008 15:03:40 +0000 (UTC)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
Message-ID: <g1p50c$97h$1@news.lrz-muenchen.de>

Skonieczny, Chris <Skonieczny.C at emssatcom.com> wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here: 
> http://mail.python.org/pipermail/python-list/2007-February/427841.html  
>  
> It is not true - eg. try : 
> a='P'            # P is ASCII , isn't it ? 
> b=int(a)
> and what you will get ? An error !!!

'P' is obviously not an ASCII representation of a number.
What did you expect? The closest number by visual appearance?

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f. Genomorientierte Bioinformatik
Technische Universit?t M?nchen
http://mips.gsf.de/staff/pagel


From martin at v.loewis.de  Fri May  9 19:37:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 01:37:07 +0200
Subject: PyXml
In-Reply-To: <mailman.890.1210367123.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
Message-ID: <4824E023.1060803@v.loewis.de>

> What's the story with PyXml?  Is it stable/complete or has effort moved
> elsewhere?

Large parts of PyXML are now part of the standard library. When I
stepped back as a maintainer, nobody volunteered to take over.

> Can anyone recommend a Python validating parser that validates vs Xml
> Schema?

The libxml bindings for Python can do that.

Regards,
Martin


From deets at nospam.web.de  Tue May  6 06:17:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:17:54 +0200
Subject: parameters to lambda's executed at run time.
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
Message-ID: <68apjeF2r9b93U2@mid.uni-berlin.de>

wyleu wrote:

> I'm trying to supply parameters to a function that is called at a
> later time as in the code below:
> 
> llist = []
> 
> for item in range(5):
>     llist.append(lambda: func(item))
> 
> def func(item):
>     print item
> 
> for thing in llist:
>     thing()
> 
> which produces the result
> 
> IDLE 1.2.1
>>>> ================================ RESTART
>>>> ================================
>>>>
> <function <lambda> at 0xb716356c>
> <function <lambda> at 0xb71635a4>
> <function <lambda> at 0xb71635dc>
> <function <lambda> at 0xb7163614>
> <function <lambda> at 0xb716364c>
>>>> ================================ RESTART
>>>> ================================
>>>>
> 4
> 4
> 4
> 4
> 4
>>>>
> 
> How can one allocate a different parameter to each instance of the
> function rather than all of them getting the final value of the loop?

That's a FAQ. Python creates a closure for you that will retain the last
value bound. To prevent that, you need to create a named paramter like
this:

lambda item=item: func(item)

That will bind the current item value at the lambda creation time.

Diez


From info at thegrantinstitute.com  Fri May 16 01:38:53 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 15 May 2008 22:38:53 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080515223853.D27E5C5D92CAB5F9@thegrantinstitute.com>

An HTML attachment was scrubbed...
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From manuhack at gmail.com  Fri May 16 18:37:11 2008
From: manuhack at gmail.com (Manu Hack)
Date: Fri, 16 May 2008 18:37:11 -0400
Subject: Rpy Module
In-Reply-To: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
Message-ID: <50af02ed0805161537q26c9ae52oa9c778263d5d5fa1@mail.gmail.com>

On Fri, May 16, 2008 at 6:14 PM, Mike P <michael.pearmain at tangozebra.com>
wrote:

> Hi experts,
>
> I've just seen there is an R module, what i can't see easily is if you
> can / how to import other modules for R into the Rpy module
>
> Can anyone advise on this?


Say if you want to use Hmisc within rpy,

import rpy
rpy.r.library('Hmisc')

Manu
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From devphyl at gmail.com  Tue May 13 06:04:06 2008
From: devphyl at gmail.com (alefajnie)
Date: Tue, 13 May 2008 03:04:06 -0700 (PDT)
Subject: array in class
Message-ID: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>

class A:
   this_is_original_variable_only_for_one_inctance = 0

   def __init__(self, v):
   self.this_is_original_variable_only_for_one_inctance = v


class B:
  this_is_common_for_all_instances = []

  def __init__(self, v):
    self.this_is_common_for_all_instances.append(v)


----------------
now I can create some instances of B, but all of them have the same
array, why

if I use append for b1.this_is_common_for_all_instances, the b2, b3
will have been changed that array.
(where bi is instance of B)
but changes on this_is_original_variable_only_for_one_inctance works
fine

why it does that?
and how create array in class - normal array, "private variable"


From johnjsal at NOSPAMgmail.com  Mon May 12 23:38:52 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:38:52 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<Dqd*eTIcs@news.chiark.greenend.org.uk>
Message-ID: <48290d4c$0$11631$607ed4bc@cv.net>

Matthew Woodcraft wrote:

> I can't tell from what you wrote whether you feel you won't have any
> reason to do any programming, or whether you already know several other
> programming languages and you feel you won't have any reason to use
> Python in particular.

Definitely the former. I've loved programming since I was in high
school, but I've never really had much of a consistent use for it. But
you're right, when there's something to be done that could benefit from
a simple script, it's so much fun to turn to Python to do it.

I think I might try to get involved in helping write the Python
documentation too, so that will keep me involved.


From tjreedy at udel.edu  Thu May  8 13:47:45 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 13:47:45 -0400
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
Message-ID: <fvvebu$ss7$1@ger.gmane.org>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:02860f2a-cd1d-4b1d-ad49-08b13032ba21 at 2g2000hsn.googlegroups.com...
| One of the few Python constructs that feels less elegant than
| necessary to me is the del statement. For one thing, it is overloaded
| to mean three different things:
| (1) del x: Remove x from the current namespace
| (2) del x[i]: Equivalent to x.__delitem__(i)
| (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

Since I see del x.a as deleting a from the attribute namespace of x, I see 
this as the same meaning.  A namespace is a specialized association (keys 
are identifier strings).  A dict is more generalized (keys merely 
hashable).  So ditto for del dic[key].

The only different meaning is del somelist[i].  The implicit association 
between counts in range(n=len(somelist)) *is* broken, but unless i == n-1, 
items are 'shifted down' so that some other item become associated with i, 
and j's for i < j < n-1 get new associations and n-1 is left with none. 
One could imagine del somelist[i] as simple leaving a void in the list. 
(Which is not to say that that would be terribly useful.)

tjr





From thomas.troeger.ext at siemens.com  Wed May 21 06:07:12 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Wed, 21 May 2008 12:07:12 +0200
Subject: Minimal Python installation?
Message-ID: <g10s8k$lgb$1@aioe.org>

Hi,

I'd like to put the python library and interpreter on a small embedded 
Linux x86 compatible device where disk space is an issue. I played 
around with the minimal Python interpreters, but was not entirely happy 
with them, so my question is, is there an (preferably easy) way to put 
the interpreter and a cut-down version of the python library/modules 
that ship with regular Python into a new archive that I can safely copy 
and use? My current method is to copy the python interpreter and the 
python shared library to the device. Then I create a tar archive with 
all startup files from the site package directory to my archive using 
the following one-liner:

strace -f -eopen python -c 'pass' 2>&1 | grep -v ENO | grep '\.py' | awk 
'BEGIN { FS="\"" } { print $2 }' | tar cvf x.tar -T -

This effectively packs all python library files that are accessed upon 
startup into a tar archive. But I figure this method is not what I want 
because there surely are files I am missing here (for example which are 
accessed when starting a script), and what I really want is a minimal 
environment that works. Let's say I want a complete Python install, but 
without all the batteries :-)

Any pointers?

Regards,
Thomas.


From bignose+hates-spam at benfinney.id.au  Mon May  5 01:16:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 05 May 2008 15:16:43 +1000
Subject: Truncate beginning of a file
References: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>
Message-ID: <87zlr5e3es.fsf@benfinney.id.au>

s0suk3 at gmail.com writes:

> file.truncate(X) will truncate the file to at most X bytes (i.e.
> leave the first X bytes of the file and throw away the rest).

Yes, by (IIRC) asking the filesystem to do this in a simple operation.
Most (all?) filesystems support this operation either directly or with
little effort.

> Is there a way to throw away, say, the first X bytes of the file,
> and leave the rest? (Without opening the same file for reading,
> reading and processing, overwriting the file with the new processed
> data, etc.)

I don't know of any filesystem that supports this operation without
reading the file data. The built-in 'file' type doesn't support it.

-- 
 \       "It's easy to play any musical instrument: all you have to do |
  `\       is touch the right key at the right time and the instrument |
_o__)                     will play itself."  -- Johann Sebastian Bach |
Ben Finney


From deets at nospam.web.de  Tue May 20 18:13:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 00:13:44 +0200
Subject: Processing in Python
In-Reply-To: <483345f5$0$902$ba4acef3@news.orange.fr>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
Message-ID: <69h0p9F327mqgU1@mid.uni-berlin.de>

Salvatore DI DI0 schrieb:
> Hello,
> 
> The Processing Graphics language has been implemented in Javascript.

No, it hasn't. Processing is written in Java.

> Does anybody tried to make this in Python ?

There are similar projects, yet maybe not to the same level of integration.

However, pygame + PyOpenGL give you pretty much the same, and even avoid 
some of the limitations of processing.

Diez


From mal at egenix.com  Fri May 30 16:48:39 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 30 May 2008 22:48:39 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <4840657A.2000904@egenix.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>	<g1p781$2j1$00$1@news.t-online.com>
	<4840657A.2000904@egenix.com>
Message-ID: <48406827.10203@egenix.com>

On 2008-05-30 22:37, M.-A. Lemburg wrote:
> On 2008-05-30 17:41, Peter Otten wrote:
>> Josep wrote:
>>
>>> I'm playing with an application framework (or kinda) that's developed
>>> with python, and it throws this error:
>>>
>>>
>>>> File
>>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", 
>>>>
>>>> line 281, in execute
>>>>     sql = unicode(sql, self.Encoding)
>>>> LookupError: unknown encoding: utf_8_euro
>>> At the application (DABO) mailing list, they have pointed that this has
>>> to be a Python issue. As I'm a totally python newbie, I would ask if
>>> somebody has experimented this kind of error, and if there is any known
>>> solution. I've found no clue searching at Google right now.
>>>
>>> My Python version is 2.5.2, Ubuntu Hardy .deb package.
>>
>> Python might get confused by an @EURO suffix in the locale:
> 
> Right, that's what's happening.
> 
> The locale module uses a locale aliasing table that help map environment
> locale settings to C local names.
> 
> That table was last updated in 2004 and since then a lot more
> locale variable strings have made their way into the Linux
> distros.
> 
> I guess we need to update the table...

I've opened ticket http://bugs.python.org/issue3011 for this.

>> $ LANG=de_DE.UTF-8 at EURO
>> $ python -c"import locale; print locale.getdefaultlocale()"
>> ('de_DE', 'utf_8_euro')
>>
>> Try setting the LANG environment variable to something like
>>
>> $ LANG=de_DE.UTF-8
>> $ python -c"import locale; print locale.getdefaultlocale()"
>> ('de_DE', 'UTF8')
>>
>> before you run your program (use ca_ES or whatever you need instead of
>> de_DE).
>>
>> Peter
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 30 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From castironpi at gmail.com  Sat May 17 04:33:44 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 01:33:44 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<95294ce6-38a0-44cd-8b0f-2bce0642886d@27g2000hsf.googlegroups.com>
Message-ID: <69100481-9da1-460f-ac75-6d71e0241f9d@b1g2000hsg.googlegroups.com>

On May 17, 3:06?am, George Sakkis <george.sak... at gmail.com> wrote:
> On May 16, 5:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
>
>
> > This might be more information than necessary, but it's the best way I
> > can think of to describe the question without being too vague.
>
> > The task:
>
> > I have a list of processes (well, strings to execute said processes)
> > and I want to, roughly, keep some number N running at a time. ?If one
> > terminates, I want to start the next one in the list, or otherwise,
> > just wait.
>
> > The attempted solution:
>
> > Using subprocess, I Popen the next executable in the list, and store
> > it in a dictionary, with keyed on the pid:
> > (outside the loop)
> > procs_dict={}
>
> > (inside a while loop)
> > process = Popen(benchmark_exstring[num_started], shell=true)
> > procs_dict[process.pid]=process
>
> > Then I sleep for a while, then loop through the dictionary to see
> > what's terminated. ?For each one that has terminated, I decrement a
> > counter so I know how many to start next time, and then try to remove
> > the record from the dictionary (since there's no reason to keep
> > polling it since I know it's terminated). ?Roughly:
>
> > for pid in procs_dict:
> > ? if procs_dict[pid].poll() != None
> > ? ?# do the counter updates
> > ? ?del procs_dict[pid]
>
> Since you don't look up processes by pid, you don't need a dictionary
> here. A cleaner and efficient solution is use a deque to pop processes
> from one end and push them to the other if still alive, something like
> this:
>
> from collections import deque
>
> processes = deque()
> # start processes and put them in the queue
>
> while processes:
> ? ? for i in xrange(len(processes)):
> ? ? ? ? p = processes.pop()
> ? ? ? ? if p.poll() is None: # not finished yet
> ? ? ? ? ? ? processes.append_left(p)
> ? ? time.sleep(5)
>
> HTH,
> George- Hide quoted text -
>
> - Show quoted text -

No underscore in appendleft.


From maxm at mxm.dk  Sun May 11 07:39:21 2008
From: maxm at mxm.dk (Max M)
Date: Sun, 11 May 2008 13:39:21 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <g06lt9$es3$1@ger.gmane.org>

wxPythoner at gmail.com skrev:

> I have two another interesting things to discuss about, for which I'll
> open new posts on this group. Look for "Python doesn't recognize quote
> types" and "Python, are you ill?".

You have a tendency to form your questions as complaints about Python 
being broken.

You will probably get better responses if you just state that there are 
things you do not understand, and ask why it works that way.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From mbelzile at softimage.com  Thu May 15 16:32:12 2008
From: mbelzile at softimage.com (=?iso-8859-1?Q?Marc-Andr=E9_Belzile?=)
Date: Thu, 15 May 2008 16:32:12 -0400
Subject: Building python 2.5 fails on linux 64
In-Reply-To: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>
References: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>
Message-ID: <0BCB4AE868D8934A8B3DCE3A58126A89021513B3@tewk-mbpf3>

So I tried with 2.6a3 and 3.0 and I ended up with the same error, but python 2.5.2 works though. Seems like something is missing from the build instructions for the newer versions I guess.
 
-mab
 


________________________________

	From: python-list-bounces+mbelzile=softimage.com at python.org [mailto:python-list-bounces+mbelzile=softimage.com at python.org] On Behalf Of Marc-Andr? Belzile
	Sent: May-15-08 10:58 AM
	To: python-list at python.org
	Subject: Building python 2.5 fails on linux 64
	
	
	Hi,
	 
	I have the following error when building python 2.5 (revision 63261)
	 
	./Parser/asdl_c.py -c ./Python ./Parser/Python.asdl
	'import site' failed; use -v for traceback
	Traceback (most recent call last):
	  File "./Parser/asdl_c.py", line 7, in ?
	    import os, sys, traceback
	ImportError: No module named os
	make: *** [Python/Python-ast.c] Error 1
	 
	I'm using gcc version 4.1.1 on Red Hat Enterprise Linux WS release 4 (Nahant Update 4)
	 
	What could be the problem ?
	 
	Thanks for helping.
	 
	-mab

	 

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From ivarnelispam at gmail.com  Mon May 19 01:28:20 2008
From: ivarnelispam at gmail.com (ivarnelispam at gmail.com)
Date: Sun, 18 May 2008 22:28:20 -0700 (PDT)
Subject: Organizing a Python project
Message-ID: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>

Hello all,

I'm starting work on what is going to become a fairly substantial
Python project, and I'm trying to find the best way to organize
everything. The project will consist of:

- A few applications
- Several small scripts and utilities
- Unit tests and small interactive test programs
- A number of custom libraries and modules that may be shared and
referenced among all of the above

I have the following general structure in mind:

myproject/
  app1/
    main.py
    file1.py
    file2.py
    tests/
      test_abc.py
      test_xyz.py
  app2/
    ...
  scripts/
    script1.py
    script2.py
  shared/
    mylib1/
      file1.py
      file2.py
      tests/
        test_foo.py
        test_bar.py
    mylib2/
      ...


The files that you might want to execute directly are:
  - Any of the "main.py" files under app*/
  - Any of the files under shared/
  - Any of the files under app*/tests or shared/mylib*/tests

So, my questions:
First of all, does this look like a reasonable overall structure, or
are there better alternatives?

Second (and the thing I'm primarily interested in), what is the best
way to deal with importing the shared modules in the applications,
scripts, test programs, and possibly other shared modules? I think the
most obvious solution is to add /path/to/myproject to PYTHONPATH.
However, this seems like an annoying little dependency that you are
likely to forget whenever you move your workspace to a new path, open
up a branch of the project in a different directory, or download and
work on the project using a different computer.

Is there a way to set this up that is a bit more self contained? For
example, at first I was somewhat hopeful that Python could ascend
parent directories until it reached a directory that did not include
an __init__.py file, and it could use this as a root for referring to
packages and modules from any file contained within. (e.g. in the
example project above, any file could refer to myproject.shared.mylib1
so long as 'myproject' and all subdirectories contained an
__init__.py, and the parent of 'myproject' didn't contain such a
file). Evidently this is not the case, but it seems like it could be a
useful feature in these situations.

Anyway, I'm sure this is not an unusual situation, so I'm curious to
hear how other people have handled it.

(Note - don't remove 'spam' from my e-mail address when replying. The
address is correct as listed)

Thanks!
Kevin


From hniksic at xemacs.org  Wed May 14 03:01:47 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 14 May 2008 09:01:47 +0200
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
Message-ID: <87r6c5s71g.fsf@mulj.homelinux.net>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Tue, May 13, 2008 at 5:57 PM, Nikhil <mnikhil at gmail.com> wrote:
>>  __len__() is a built-in function of the list object and is updated along
>> with the list object elements and will be useful incase the list is very
>> huge.
>>
>>  len() is an external method again, which may require the processing cycles
>> again.
>
> The purpose of obj.__len__() is to implement len(obj), which simply
> calls it.  So obj.__len__() may be faster, but only marginally.

Have you tried it?  __len__ is in fact marginally slower because it
involves a dict lookup, whereas the built-in len() knows how to cheat
and invoke __len__ through a slot in the C type struct very
efficiently.

$ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
1000000 loops, best of 3: 0.24 usec per loop
$ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
1000000 loops, best of 3: 0.347 usec per loop


From arnodel at googlemail.com  Sat May  3 13:40:20 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 18:40:20 +0100
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <m2zlr7l20r.fsf@googlemail.com>

Szabolcs Horv?t <szhorvat at gmail.com> writes:

[...]
> A little research shows that Mathematica uses a "compensated
> summation" algorithm.  Indeed, using the algorithm described at
> http://en.wikipedia.org/wiki/Kahan_summation_algorithm
> gives us a result around ~ 10^-17:
>
> def compSum(arr):
>     s = 0.0
>     c = 0.0
>     for x in arr:
>         y = x-c
>         t = s+y
>         c = (t-s) - y
>         s = t
>     return s
>
> mean = compSum(data)/len(data)
> print compSum(x - mean for x in data)/len(data)
>
>
> I thought that it would be very nice if the built-in sum() function
> used this algorithm by default.  Has this been brought up before?
> Would this have any disadvantages (apart from a slight performance
> impact, but Python is a high-level language anyway ...)?
>
> Szabolcs Horv?t

sum() works for any sequence of objects with an __add__ method, not
just floats!  Your algorithm is specific to floats.

-- 
Arnaud


From larry.bates at websafe.com`  Tue May 20 19:51:29 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 20 May 2008 18:51:29 -0500
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <YeudnY7U1IiO-a7VnZ2dnUVZ_rvinZ2d@comcast.com>

John Salerno wrote:
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. Here's 
> the two examples:
> 
> Example 1:
> --------------------
> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> ----------------------
> 
> Example 2:
> ------------------------
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> --------------------------
> 
> In example 1, the intention to make an in-place change is explicit, and it's 
> being used as everyone expects it to be used. In example 2, however, I began 
> to think this might be an abuse of list comprehensions, because I'm not 
> assigning the result to anything (nor am I even using the result in any 
> way).
> 
> What does everyone think about this? Should list comprehensions be used this 
> way, or should they only be used to actually create a new list that will 
> then be assigned to a variable/returned/etc.? 
> 
> 

You might use this:

def compress(s)
  return ''.join([ u for u in s if u not in locals()['_[1]'] ])


From tjreedy at udel.edu  Mon May 19 00:22:24 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 00:22:24 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<m2ve1b7msb.fsf@googlemail.com>
Message-ID: <g0qv9t$1ge$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2ve1b7msb.fsf at googlemail.com...
| Lie <Lie.1296 at gmail.com> writes:
|
| > Lambda can actually be safely removed from python and no other
| > features would be missing. It is always possible to create a def
| > version of any lambda, so lambda is useless. It is just a convenience
| > for the times where we're just too lazy to invent a name and find a
| > place to place the def, instead just inlining the function.
|
| Note that the same thing can be said about generator expressions,
| which are nothing more than anonymous, non-reusable, generator
| functions.

Right.  So if someone posted on genexp confusion, I would suggest
'write a full generator function'.

| Instead these were _added_ to the language!

As a convenience.
Actually, if one uses more that one for-clause in a generator expression,
there is a potential gotcha in relation to name capture.  So if that bites,
the genexp is not so much a convenience, and one might better write
the full function.

tjr





From mail at timgolden.me.uk  Thu May 29 08:00:59 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 13:00:59 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483E9AFB.2040402@timgolden.me.uk>

Tim Golden wrote:
> lixinyi.23 at gmail.com wrote:
>> I'm currently working on a scientific computation software built in
>> python.
>> What I want to implement is a Matlab style command window <->
>> workspace interaction.
>>
>> For example, you type 'a=1' in the command window, and you see a list
>> item named 'a' in the workspace.
>> You double click the icon of the item, and you see its value. You can
>> modify the value of the list item,
>> 1 -> 100 etc,  after which if you go back to the command window and
>> type 'a'  and press enter, you see that
>> varable a's value has been changed to 100.
>>
>> So my question is : if you have two DOS command windows running under
>> WINDOWS OS, how can you make them share the same internal variable
>> buffer? Or is there any easier way to implement such kind of
>> interaction?
> 
> I stronly suggest you look at IPython [1]. To do what I think
> you're describing, you'd need to hack or reimplement the interpreter.
> And that's what they've done. ISTR that they even have a branch
> which is dealing with parallel instances.

Sorry, having seen Roger D's memcached suggestion, I realise I may
have misinterpreted your requirement. I thought that you wanted
a Python interpreter session to share its objects to another window,
hence my IPython suggestion. If you're writing your own console app
and want to share stuff, then there's any number of IPC possibilities.

Roger's already mentioned memcached which I've no more than a
passing knowledge of. But Pyro [1] is often a good bet for these
things, and the pyprocessing [2] module is gaining a fair bit of
traction at the moment. (To name just two out of many).

TJG

[1] http://pyro.sf.net
[2] http://pyprocessing.berlios.de/



From lists at cheimes.de  Fri May  2 17:51:13 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 23:51:13 +0200
Subject: 'property' builtin does not work for me
In-Reply-To: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
References: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
Message-ID: <481B8CD1.1010001@cheimes.de>

Alex Fainshtein schrieb:
> As you see, getter works properly. But when assigning to property, setter is
> not called, as I would expect. prop is simply replaced with whatever is
> assigned and ceased being a property.

properties work only for new style classes. You have to subclass your
class from object in order to get a new style class:

class Test(object):
    def getter(self):
        print "Getter called."
        return 'a'

    def setter(self, val):
        print "Setter called."

    prop = property(getter, setter)

Christian



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 06:33:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 12:33:34 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <482abff7$0$11008$426a74cc@news.free.fr>

Dave Parker a ?crit :
(snip spam)

Please stop spamming here trying to sell your dumbass proprietary basic.


From basti.wiesner at gmx.net  Sat May 24 18:42:00 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 00:42:00 +0200
Subject: module import problem
References: <mailman.1545.1211668266.12834.python-list@python.org>
Message-ID: <g1a5ku$b70$01$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ Milos Prudek <prudek at bvx.cz> ]

> If I cd into /usr/share/python-support/python-gnupginterface and launch
> Python I can "import GnuPGInterface". But when I run
> DistUpgradeFetcherCore.py in that folder it always fails with No module
> named GnuPGInterface.
> 
>  I do not know much about setting python path.

Reinstall the package "python-gnupginterface" with "sudo aptitude reinstall
python-gnupginterface".  This should fix the problem, unless your package
management is broken.

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkg4mb0ACgkQn3IEGILecb6jpACfc80saFQz/Q6F5lYbuCUQxJt2
Z+8AoKkB+5hqm0tMmK/d1s1IjsSSCqAz
=Z6/t
-----END PGP SIGNATURE-----


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:50:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:50:06 -0300
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
	<1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>
	<2598173e-356e-49b8-8875-00556f5cfe98@j33g2000pri.googlegroups.com>
Message-ID: <op.ubg5psi2x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 04:04:13 -0300, sandeep <shiningsandy at gmail.com>  
escribi?:

> thanks for ur replies. i have a bit closer look at my code and i am
> able to fix the problem.now my exe is working fine.the code is bit
> more cleaner now as i removed lot of unused function from it and try
> to document it also.

Glad to see it worked finally. Just a few comments:

> #function which will initialise outlook and return its reference
> def getAppRef():
>     temp=win32com.client.Dispatch("OutLook.Application")
>     return temp.GetNamespace("MAPI")

Instead of a comment, use a docstring
<http://docs.python.org/tut/node6.html#SECTION006600000000000000000>

def getAppRef():
     """Initialise outlook and return its reference."""
     ...

>         abc=os.path.isdir(os.getcwd()+'\email')
>         if(abc==True):
>             print 'directory exists'
>         else:
>             os.mkdir(os.getcwd()+'\email')
>         path=os.path.abspath(os.getcwd()+'\email')
>         atmt.SaveAsFile(path+"\\"+atmt.DisplayName)

Use '\\email' instead, or r'\email'. \ is the escape character, '\temp'  
actually isn't what you may think. The rules:  
<http://docs.python.org/ref/strings.html>
Anyway, it's much better to use os.path.join to build a path:

email_dir = os.path.abspath(os.path.join(os.getcwd(), 'email'))
abc = os.path.isdir(email_dir)
if abc:
     print 'directory exists'
else:
     os.mkdir(email_dir)
atmt.SaveAsFile(os.path.join(email_dir, atmt.DisplayName))

> # function to check whether the character encoding is ascii or smthing
> else
> def checkStringType(a):
>     if isinstance(a,str):
>        b='not a unicode string'
>     else:
>         a.encode('utf-8')
>         #print 'unicode type'
>     return a

This function does not perform what the comment says.
The b='...' is useless, and the a.encode(...) line *returns* a string  
(which is immediately discarded) - it does not modify `a`, strings in  
Python are immutable.

-- 
Gabriel Genellina



From skanemupp at yahoo.se  Fri May 16 15:17:50 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 12:17:50 -0700 (PDT)
Subject: save dictionary for later use?
Message-ID: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>

i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.


From rajarshi.guha at gmail.com  Tue May 13 13:10:23 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Tue, 13 May 2008 10:10:23 -0700 (PDT)
Subject: usage of python
Message-ID: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>

Hi, I teach an introductory programming course in Python. As part of
the introduction I'd like to highlight the usage of Python in
industry. The idea is to show that there are big players using Python
for a variety of tasks. Given that the students come from a variety of
backgrounds and are not necessarily 'hackers', I'm trying to look for
examples with a bit of wow-factor.

Is there any list with people/groups/companies using Python for
impressive things?

Any pointers would be appreciated

Thanks,
Rajarshi


From lists at cheimes.de  Mon May  5 15:46:20 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 05 May 2008 21:46:20 +0200
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
In-Reply-To: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
Message-ID: <fvno6d$qgm$1@ger.gmane.org>

brucoder schrieb:
> Any pointers?  A prerequisite that I might be missing?  The source is
> the Python-2.5.2.tar.gz from the Python.org site.

The tar.gz doesn't contain the dependencies like the bsddb files or
sqlite3, bzip2 and more. You have to download and unpack the correct
versions into the correct folder. Please read PCbuild/readme.txt

Christian



From bbxx789_05ss at yahoo.com  Sun May 11 16:30:02 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:30:02 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga> <m21w484o4e.fsf@googlemail.com> 
	<QpIVj.32520$KJ1.5565@newsfe19.lga>
Message-ID: <8878fece-434c-44e0-9386-dc79d376819b@z72g2000hsb.googlegroups.com>

On May 11, 2:11?pm, bc90021 <pyt... at bc90021.net> wrote:
> [CUT]
>
> > I have in no way assumed that you are stupid. ?I have tried to help you
> > formulate your problem better so that people on the list can help you.
> > I believe I have done so respectfully, with the aim of introducing you
> > to the modus operandi of this group.
>
> I appreciate your help. ?However, the comments I got from other people
> that "I'm sure you have quotes here..." type comments are incredibly
> insulting. ?To tell someone that you're sure that they have quotes around
> something when they don't is the height of arrogance and rudeness.
>

The best way to get help is to post a simple example that demonstrates
your problem and that anyone can run and get the same error you are
getting.  That means you need take your real code and you start
hacking out the bits that are irrelevant to the problem.  With
judicious use of print statements you should be able to narrow the
problem down.

Your first post was about as far away from that as it could be.  Your
first post was essentially equivalent to asking:

> Why does this line:

>print name

>display "Jack" and not "Jill".

When you post a question like that, then you are either going to be
met with silence or people will attempt to debug your imaginary code
and guess at the problem, which sometimes works and sometimes
doesn't.  If you find the guesses insulting, then post a better model
of your problem.  The fact that you found these guesses insulting,
even though they were respectfully given and they were the obvious
answers in light of how little information you gave, means you are
probably going to have problems on any newsgroup you post to.

The python community has some real jerks in it, but you didn't meet
any of them in this thread.





> >> (I really must say that so far the help I am getting in the Python
> >> community is a big let down. ?Whether it's on IRC or here, everyone has
> >> an arrogance that I don't find anywhere else in the open source
> >> community, and it seriously makes me question the choice of language
> >> that I've made.)
>
> > Don't judge too quickly. ?I think this newsgroup is on the whole
> > extremely helpful. ?I have learnt a lot from it. ?But you have to get
> > used to its ways, and until you are familiar with them, approach it with
> > humility.
>
> Unfortunately, this is not my first interaction with the Python IRC
> communities or Python newsgroups. ?I had tried working with this language
> a while back (around 2000) and the answers I got were unhelpful and
> usually rude. ?I decided to give it another shot for the program I'm
> writing, and I'm regretting that. ?It's possible that I'm to blame - I'm
> the common factor in both instances, but at the same time, when you ask a
> question in #python and NO ONE ANSWERS at all, and they all just sit
> there not talking at all, what's the point of having the IRC channel? ?If
> newbies can't go there for help, what's the point? ?When there are 70
> people in a channel, and no one even acknowledges your question has been
> asked, where does one go for help? ?It's like talking to yourself.
>
> >> The error message was at the top of the thread (am I incapable of
> >> posting it, or are you incapable of following a thread?), but here it
> >> is again:
>
> >> IOError: [Errno 2] no such file u'tempfileName'
>
> > This is different from the error message that you posted in your
> > original message.
>
> > Anyway, what is useful to us is a full traceback, no just an error
> > message.
>
> It is not "different" except that I posted the full name the second
> time. ?(tempfileName instead of the previously simplified fileName) ?The
> code itself is actually irrelevant, in my humble opinion. ?In one place a
> file creation line does not work; in the second place it does. ?How can
> the same line of code do two different things in two places? ?Either it
> creates a file or it doesn't. ?It should create the file in either place,
> regardless of where it's being called.
>
> Either way, I figured it out.



From skanemupp at yahoo.se  Thu May 15 12:57:50 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:57:50 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org>
Message-ID: <a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>

yeah i was unclear but i tested different stuff at the same time.
and flim is not misspelled i just created it and jolted osmething down
and it became flim...

print os.path.exists('C:/Python25/myPrograms/netflix/flim.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
#print d.readline()
print d.read()

d.close() #not necessary?

print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\training_set')

i can read flim and exists returns true.

however
print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet')
returns True but
print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
\training_set') returns False...

i have thourogly checked the filename to be correct and if we assume
it is what could this mean then?
i had a problem one other time when i had renamed a file but windows
didnt rename it compeltely apparently.


From jonbutler88 at googlemail.com  Wed May 21 05:02:22 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 02:02:22 -0700 (PDT)
Subject: Typeerror
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com> 
	<mailman.1414.1211360353.12834.python-list@python.org>
Message-ID: <9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>

On May 21, 9:58?am, Freaky Chris <angry-ch... at hotmail.com> wrote:
> This is a simple error, you are passing the variable res as an interger to
> use for a slice when what ever you are storing in res isn't an integer.
>
> Chris
>
>
>
> Beema shafreen wrote:
>
> > Hi all,
> > I getting the following error when i run my scirpt ,
> > can somebody help me regarding this to solve the type error problem
>
> > Traceback (most recent call last):
> > ? File "get_one_prt_pep.py", line 59, in ?
> > ? ? if len(data[res])<=1:
> > TypeError: string indices must be integers
>
> > --
> > Beema Shafreen
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> View this message in context:http://www.nabble.com/Typeerror-tp17358659p17358932.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

If it is an integer, but stored as a string you can use:

if len(data[int(res)])<=1

its not pretty but it should sort out the type errors


From darcy at druid.net  Thu May 29 17:57:45 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 29 May 2008 17:57:45 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <Xns9AADA759AF2ABduncanbooth@127.0.0.1>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
Message-ID: <20080529175745.b3e7a579.darcy@druid.net>

I guess I am still new to this group and don't understand its charter.
I wasn't aware that it was a Flaming Blunder group.  Can someone please
point me to a newsgroup or mailing list dedicated to the Python
programming language?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From Matthew.Moorland at gmail.com  Mon May  5 15:09:47 2008
From: Matthew.Moorland at gmail.com (ETP)
Date: Mon, 5 May 2008 12:09:47 -0700 (PDT)
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
	<6885g8F2s6gaeU1@mid.uni-berlin.de>
Message-ID: <61e2bf8f-d2e4-48dc-a488-1c8c38cbcd0d@w34g2000prm.googlegroups.com>

I don't doubt I misunderstand since most programming jargon goes over
my head.

That said, I'm sure you can guess my OS is Windows and I don't know
what an API is.  After a quick search it looks like windows uses
something called DirectInput for gaming devices.  Is anyone familiar
with DirectInput?  Is it implementable in Python?

Here's my source: http://msdn.microsoft.com/en-us/library/bb219802(VS.85).aspx

Actually, I found this, too:  http://directpython.sourceforge.net/

Sounds like it is very straight forward.  i would definitely still
appreciate any comments or suggestions on the best way to implement a
game controller.

Thanks again.


From deets at nospam.web.de  Tue May  6 07:33:42 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 13:33:42 +0200
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <68au1hF2qevdkU1@mid.uni-berlin.de>

clyfish at gmail.com wrote:

> In cmd, I can use find like this.
> 
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 
> C:\>
> 
> And os.system is OK.
>>>> import os
>>>> os.system('netstat -an | find "445"')
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>>>>
> 
> But I don't know how to use subprocess.Popen to do this.

While there certainly are valid usecases for piping with subprocess in
Python - this ain't one I'd say. Just read the output of netstat yourself,
and filter for lines that contain the desired pattern.

Diez


From basti.wiesner at gmx.net  Sat May 24 15:23:58 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 24 May 2008 21:23:58 +0200
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
Message-ID: <g19q1l$pd5$01$1@news.t-online.com>

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Hash: SHA1

[ Diez B. Roggisch <deets at nospam.web.de> ]
>> I finally managed to work with static files with a little hack, but it's
>> ugly because I'm reading each static file per request.
> 
> How else should that work? Apache does that the same way.

I guess, Apache does some kind of memory caching for files, which are often
requested and small enough to fit into the system memory.  May be, that's
what the OP is referring to ...

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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dYYAnjH3E0/e2y0owJ1PuWMk13i9YVA/
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From gnewsg at gmail.com  Wed May 21 23:35:53 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 21 May 2008 20:35:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<2G3Zj.285812$pM4.26927@pd7urf1no>
Message-ID: <20d322a6-3132-4482-83fa-210397fefc8c@27g2000hsf.googlegroups.com>

On 21 Mag, 17:34, Dave Parker <davepar... at flamingthunder.com> wrote:

> [...] symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.
>
> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:
>
>      Set x to 8.

Sorry but... are you really trying to tell us that a person which is
not able to understand "x = 5" should use a programming language?
Such a person shouldn't even use a computer and I strongly doubt that
your syntax solution would make ring a bell in his head!
Besides that what makes you think that:

Set n to 1
Factorial is a function(n) doing
   if n = 0 then return 1 else return n*factorial(n-1).

...is more clear/intuitive than:

n = 1
def factorial(n):
    "this is a function doing:"
    return 1 if n == 0 else n * factorial(n-1)

...?
IMHO, it seems to me that you've just tried to mix "comments" and
"code" into a single thing for no other reason than to be different.
I'd be curious to see some code samples solving some - real world -
problems instead of showing hot to calculate factorials, printing
hello worlds or read from a file, which are the only code samples I've
seen in the homepage and in the documentation.


--- Giampaolo
http://code.google.com/p/pyftpdlib



From rhamph at gmail.com  Tue May 20 00:55:27 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 19 May 2008 21:55:27 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
Message-ID: <58a61ace-5b19-4427-a311-9a0671779fa1@t12g2000prg.googlegroups.com>

On May 19, 11:31 am, "Chris Mellon" <arka... at gmail.com> wrote:
> On Mon, May 19, 2008 at 11:36 AM, Roger Heathcote
> > Fair point, but for sub processes that need to be in close contact with the
> > original app, or very small functions that you'd like 100s or 1000s of it
> > seems like a kludge having to spawn whole new processes build in socket
> > communications and kill via explicit OS calls. I can't see that approach
> > scaling particularly well but I guess there's no choice.
>
> It's not a kludge - the whole reason why killing a thread is undefined
> and a "cardinal sin" is because it's in your own address space and you
> can't guarantee anything about how it left things when you killed it.
> You simply can't have it both ways. If you want to be able to safely
> and sanely kill an uncooperative thread (*especially* third party code
> you don't control) you have to isolate it from your address space, and
> this means a process. This is a fundamental problem with the entire
> idea of shared-state concurrency. For the record, you can't use 1000s
> of threads either - if you really need 1000s of concurrent things
> running you need to re-think your concurrency model and possibly your
> choice of languages and environment.

Strictly speaking, you CAN use 1000s of threads, but it requires some
special effort.

It's not a good idea though, at least for the near future.  If you
want to kill a thread you have to do it cooperatively, and for the
effort required to get that right you might as well make the whole
thing event-driven.


> The messiness of the real world is *why* you should use processes, not
> a reason to avoid them.
>
> > Does anyone think it likely that the threading module (and threading in
> > general) will be improved and augmented with features like timeouts and
> > arbitrary threadicide in the next year or two?  Seems there's little scope
> > for tapping the power of the current generation of multiple cores with the
> > current pythons, tho I appreciate breakneck speed has never been a design
> > objective it looks like multicore is set to be the next generation PC
> > architecture.
>
> They absolutely should not be. Adding an API which can't work in the
> general case and is dangerous even when it can work does not do anyone
> any favors.

I agree, if it's not safe there's no point adding it.

However, if you change the parameters a little bit.. it's quite
possible to redefine many blocking functions as cooperative
cancellation points.  This is the approach I take with python-
safethread, and it should satisfy most purposes.


From gherron at islandtraining.com  Thu May 15 19:00:03 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 16:00:03 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
	<482CA10E.1040602@islandtraining.com>
	<BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl>
Message-ID: <482CC073.20402@islandtraining.com>

Marlin Rowley wrote:
> Hey Gary!

Please keep such discussions on the public python-list -- not  personal 
e-mail.

Scroll down for an answer to your latest question.
>
> Here's what I have that renders fine but I see some optimization that 
> can be done (as you mentioned):
>
> # Tile Generation
> # This is where all the drawing to the client window
> # will happen. 
> def generateTile( txl, tyl, tileWidth, tileHeight, clientWindow ):
>     # make rgba (8-bit) data structure and zero it out.
>     rgb = zeros( tileWidth*tileHeight*3, UnsignedInt8 )
>     alpha = zeros( tileWidth*tileHeight*3, UnsignedInt8 )
>    
>     #print 'tileWidth: %s' % tileWidth
>     #print 'tileHeight: %s' % tileHeight
>     # for each pixel in the tile
>     # we must invert the rendering of each
>     # tile for wxPython's Bitmap support.
>     for y in range( (tileHeight-1),-1,-1 ):
>         for color in range(4):
>            
>             # read per scanline
>             pixelComp = clientWindow.fileIO.read(4*tileWidth) <<<< 
> HERE'S YOUR OPTIMIZATION!!
>    
>             for x in range(tileWidth):
>                 # mental ray streams RGBA components across the width
>                 # of every tile.  so it first does all the r's,
>                 # then all the g's, then all the b's, etc.. across
>                 # the width.. Then it streams the second row, etc..
>                 # However, wxPython Bitmap class accepts an array of
>                 # tuples or just a byte order of RGBARGBARGBA, etc..
>                 # so we convert, keeping track of an offset.
>                 if color < 3:
>                     index = (3*(y*tileWidth+x))+color
>                 else:
>                     index = (3*(y*tileWidth+x))
>                
>                
>                 # RGBA_FP
>                 if clientWindow.pixelCode == 13:
>                    
>                     # unpack the pixel
>                     #fourbytes = pixelComp[:4]
>                     #pixelComp = pixelComp[4:]
>                     buffer = unpack("!f", pixelComp[4*x:4*x+4])  
> <<<<<<<<<<<<<<<<<< YOUR OPTIMIZATION!!
>                    
>                     # convert from 32-bit to 8-bit precision
>                     gamma = clientWindow.gamma
>                     if gamma == 1.0:
>                         pixel = int(255 * buffer[0] + 0.5)
>                         pixel = clamp(pixel,0,255)
>                         if color == 3:
>                             alpha[index+0] = alpha[index+1] = 
> alpha[index+2] = pixel
>                         else:
>                             rgb[index] = pixel
>                     else:
>                         pixel = int(buffer[0] * GAMMA_BIT_PRECISION + 0.5)
>                         pixel = clamp(pixel,0,GAMMA_BIT_PRECISION-1)
>                         # set the color and alpha
>                         if color == 3:
>                             alpha[index+0] = alpha[index+1] = 
> alpha[index+2] = clientWindow.frame.gammaTable[pixel]
>                         else:
>                             rgb[index] = 
> clientWindow.frame.gammaTable[pixel]
>                    
>                        
>                     # ...
>
>     # create an empty rgb and alpha tile
>     tileRGB = wx.BitmapFromBuffer( tileWidth, tileHeight, rgb )
>     tileAlpha = wx.BitmapFromBuffer( tileWidth, tileHeight, alpha )
>          
>     # set up  main device to render to the current
>     # buffers
>     dc = wx.BufferedDC( None,clientWindow.colorBuffer )
>     dca = wx.BufferedDC( None,clientWindow.alphaBuffer )
>    
>     # draw tiles
>     dc.DrawBitmap( tileRGB, txl, (clientWindow.height-tileHeight)-tyl )
>     dca.DrawBitmap( tileAlpha, txl, (clientWindow.height-tileHeight)-tyl )
>
>
> I'm no python expert (as you can tell), but I'm trying.. :)
>
> I started to re-write this function but I'm confused on how to do:
>
> > Reshape the array into a 3D array (i.e., a rectangular array of RGBA
> > values)
>
> this without using a for loop.

Yes, easily.  No Python loops (although plenty of C-level loops.)   (I 
think you are using Numeric -- a ancient predecessor of numpy.  However, 
I think these operations work in Numeric.)


Again I create a small test case.  The values will be in the order 
rrrrggggbbbb to start with, and rgbrgbrgbrgb afterwards.

Create a test array and examine it:
 >>> a = numpy.frombuffer('rrrrggggbbbb', dtype='S1')
 >>> a
array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b'],   
dtype='|S1')

Isolate each color component (here height*width = 4)
 >>> a.shape = (3,4)
 >>> a
array([['r', 'r', 'r', 'r'],
       ['g', 'g', 'g', 'g'],
       ['b', 'b', 'b', 'b']],
      dtype='|S1')

Transpose it.  (This creates a new array by copying efficiently.)
 >>> b = a.transpose()
 >>> b
array([['r', 'g', 'b'],
       ['r', 'g', 'b'],
       ['r', 'g', 'b'],
       ['r', 'g', 'b']],
      dtype='|S1')

Reset it's shape to be a width*height array of rgb's.
 >>> b.shape = (2,2,3)
 >>> b
array([[['r', 'g', 'b'],
        ['r', 'g', 'b']],

       [['r', 'g', 'b'],
        ['r', 'g', 'b']]],
      dtype='|S1')

Put it out in byte array form:
 >>> b.tostring()
'rgbrgbrgbrgb'


Done.


Gary Herron


>
> -M
>
>
> > Date: Thu, 15 May 2008 13:46:06 -0700
> > From: gherron at islandtraining.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > Marlin Rowley wrote:
> > > Gary,
> > >
> > > I'm getting streaming tile data from a renderer in order to allow the
> > > user to see the rendering of tiles in real-time to create the total
> > > image. I'm NOT reading an entire image scanline-by-scanline. The
> > > renderer streams in a series of floats (for each tile) and I build
> > > this tile up from each individual color component passed in. I then
> > > convert it to a small bitmap and blit() it to the window that will
> > > eventually make up my entire image. I'm just wanting to make the
> > > process as fast as the renderer can render the tiles. I've noticed on
> > > scenes that aren't very complex for the renderer that my python 
> script
> > > is spending most of it's time drawing while the renderer is already
> > > done. What you've given me has sped up the drawing a lot, but I'm
> > > hungry for more optimization!
> > >
> > > There is no file format to be read. The data is raw bytes and can be
> > > any format.
> >
> > You are misinterpreting what I mean by a format. All data is a string
> > of bytes, and interpreting that string of bytes to have some particular
> > form is applying a format to it. Your particular format is: each 4
> > bytes represents a float, and a string of such floats give the RGBA
> > values for a rectangle (of some size) of pixels. I doubt that you are
> > the first ever to use that particular format to encode an image, but I
> > also don't believe it matches any of the standard image formats.
> >
> > So... There is still hope to use already written tools to decode your
> > format.
> >
> > Here's a hint on how to use numpy for decoding a byte string into an
> > array of floats. My example byte string is a hand coded string of just
> > 12 bytes -- you should replace that with a whole row or better yet, a
> > whole tile's worth of bytes.
> >
> > >>> import numpy
> > >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'
> > >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)
> > >>> b
> > array([ 1., 2., 3.], dtype=float32)
> >
> >
> > If you want to use the array module instead:
> >
> > >>> import array
> > >>> a = array.array('f')
> > >>> a.fromstring(byteString)
> > >>> a
> > array('f', [1.0, 2.0, 3.0])
> >
> >
> > In either case ANY number of bytes can be decoded into an array of
> > floats, in one highly efficient call from Python.
> >
> > What you do with that array of float afterwards is up to you....
> >
> > If I read your note correctly, here's what I'd do to turn the array of
> > bytes into an image of a tile to be displayed on the screen.
> >
> > Get the whole tile's worth of bytes with one read into a single string.
> > Decode that string into an array of floats (as above).
> > Reshape the array into a 3D array (i.e., a rectangular array of RGBA
> > values)
> > Convert that array of floats into an array of 8-bit integers (scaling
> > all by 255).
> > Extract (via tostring) that array into a string of bytes.
> > Send that string of bytes to the graphics system as an RGBA array of
> > pixels.
> >
> > Each of these calls is one Python call into a highly efficient library.
> > This is using Python as a, so called, glue language.
> >
> > Gary Herron
> >
> >
> >
> >
> >
> >
> >
> > >
> > > > Date: Thu, 15 May 2008 10:09:45 -0700
> > > > From: gherron at islandtraining.com
> > > > CC: python-list at python.org
> > > > Subject: Re: How do I use the unpack function?
> > > >
> > > > John Machin wrote:
> > > > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> 
> wrote:
> > > > >
> > > > >> Marlin Rowley wrote:
> > > > >>
> > > > >>> All:
> > > > >>>
> > > > >>> I've got a script that runs really slow because I'm reading 
> from a
> > > > >>> stream a byte at a time:
> > > > >>>
> > > > >>> // TERRIBLE
> > > > >>> for y in range( height ):
> > > > >>> for color in range(4):
> > > > >>> for x in range( width ):
> > > > >>> pixelComponent = fileIO.read(4)
> > > > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE
> > > > >>>
> > > > >
> > > > > [snip]
> > > > > Perhaps the OP might be able to use the Python Imaging Library 
> (PIL)
> > > > > instead of reinventing an image-file handler.
> > > > >
> > > >
> > > > Indeed. That's why my original answer included the line:
> > > > There are probably better ways overall, but this directly answers
> > > > your question.
> > > >
> > > > Other possibilities.
> > > >
> > > > I don't recognize the file format being read in here, but if it is a
> > > > standard image format, the PIL suggestion is a good way to go.
> > > >
> > > > Or, if it is an image of not too enormous size, read the *whole* 
> thing
> > > > in at once.
> > > >
> > > > Or rather than manipulate the array by carving off 4 bytes at a 
> time,
> > > > just index through it in 4 byte chunks:
> > > > for i in range(width):
> > > > buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> > > >
> > > > Or
> > > > for i in range(0,4*width,4):
> > > > buffer = unpack("!f", pixelComponent[i:i+4])
> > > >
> > > > Or
> > > > Use numpy. Create an array of floats, and initialize it with the 
> byte
> > > > string, making sure to take endianess int account. (I'm quite 
> sure this
> > > > could be made to work, and then the whole operation is 
> enormously fast
> > > > with only several lines of Python code and *no* Python loops.
> > > >
> > > > Or
> > > > ...?
> > > >
> > > > Gary Herron
> > > >
> > > > > --
> > > > > http://mail.python.org/mailman/listinfo/python-list
> > > > >
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > >
> > > 
> ------------------------------------------------------------------------
> > > Windows Live SkyDrive lets you share files with faraway friends. 
> Start
> > > sharing.
> > > 
> <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> ------------------------------------------------------------------------
> Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it 
> out! 
> <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>



From george.sakkis at gmail.com  Wed May 14 10:30:04 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 07:30:04 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
Message-ID: <238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>

On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> > An instance method works on the instance
> > A Static method is basically a function nested within a class object
> > A class method is overkill?
>
> If anything, a static method is overkill. See it this way: *if* you for some
> reason put a method into an enclosing context - isn't it worth having a
> reference to that?

My feeling exactly; these days I almost always use class methods
instead of static. I vaguely remember seeing somewhere an example
where a static method was the only (elegant) solution; neither a class
method nor a plain function would do. I'll post it if I find it unless
someone beats me to it.

George



From banibrata.dutta at gmail.com  Sun May 11 00:17:22 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sun, 11 May 2008 09:47:22 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
Message-ID: <3de8e1f70805102117p584e5920hb4a99166488c6448@mail.gmail.com>

I realized that my query was not making much sense, or a bit convoluted. A
simler form of the question:

For packages which do contain .dlls & .pyd's (not pure Python) their latest
version may be compatible with -- say Python 2.5, whereas I need the version
compatible for Python2.2. Is this a completely manual exercise ?


On 5/11/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
> Thanks Gabriel & Terry. Those explanations make perfect sense.
>
> What is the recommended way, to find the "compatible" packages that include
> .dll's / .pyd's or dependencies that are Python release specific ? For
> example, is there a 'yum' or other automatic dependency checking mechanism
> which works accross OS's (Windows & Linux), which will allow me to find the
> other (s.a. 3rd party) packages, which would work with say Python2.2 ? Is it
> a completely manual exercise, where I read the README or Package Notes or
> Release Notes, and figure out the required version of package ?
>
>
>  On 5/11/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>>
>> En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <
>> banibrata.dutta at gmail.com> escribi?:
>>
>> > given that I already have Python2.5 installed & will install Python2.4,
>> will
>> > copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
>> > i think the answer is "no", but still asking. is it package specific ?
>> >
>> > does it matter if the packages were egg drops ?
>>
>> Packages containing only .py modules ("pure" packages) are OK; packages
>> using C extensions (.dll, .pyd) have to be rebuilt (or you have to download
>> the binaries for the other Python version).
>>
>> --
>> Gabriel Genellina
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From cjw at ncf.ca  Sat May 17 20:00:48 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 17 May 2008 20:00:48 -0400
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <482F71B0.3050808@ncf.ca>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
> 
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C, but I like Python more.
> 
> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

The usual answer is that development 
time is more important than running time.

Since you are likely to be using arrays, 
you might look at numpy, where the 
number crunching is using compiled C code.

> 
> * I don't know how likely it is to find libraries in Python related to
> my research field.
> 
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Try Google with Python and your area of 
interest.  You could well find 
Python-based packages which meet your needs.

> 
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
> 
> Thank you in advance.

Good luck.

Colin W.


From stefan_ml at behnel.de  Sun May  4 01:46:40 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 04 May 2008 07:46:40 +0200
Subject: Error handling in SAX
In-Reply-To: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>
References: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>
Message-ID: <481D4DC0.9060709@behnel.de>

mrkafk at gmail.com wrote:
> (this is a repost, for it's been a while since I posted this text via
> Google Groups and it plain didn't appear on c.l.py - if it did appear
> anyway, apols)

It did, although some people have added google groups to their kill file.


> So I set out to learn handling three-letter-acronym files in Python,
> and SAX worked nicely until I encountered badly formed XMLs, like with
> bad characters in it (well Unicode supposed to handle it all but
> apparently doesn't),

If it's not well-formed, it's not XML. XML parsers are required to reject non
well-formed input.

In case it actually is well-formed XML and the problem is somewhere in your
code but you can't see it through the SAX haze, try lxml. It also allows you
to pass the expected encoding to the parser to override broken document encodings.

http://codespeak.net/lxml/

Stefan


From otaeris at o2.pl  Thu May 29 11:14:46 2008
From: otaeris at o2.pl (otaeris at o2.pl)
Date: Thu, 29 May 2008 17:14:46 +0200
Subject: =?UTF-8?Q?Writing_Empty_folders_into_ZipFile?=
Message-ID: <ee804e1.346a1113.483ec866.59084@o2.pl>

Hello.

I'm having situation writing folders structure into 
a zip file. Folders contain no files. 

Is it possible to do in python ?

Regards,
Bartek


From jschroed at gmail.com  Thu May  8 22:34:59 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 19:34:59 -0700
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
	<92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>
Message-ID: <4878ad7b0805081934j383998b5rd88baa57927c0ce5@mail.gmail.com>

Thanks guys.  That upper() function reminded me to use the isupper()
function.  I got this going in a single pass:

def a(name):
    self_name = name
    # Increment this value every time we add a space
    offset = 0
    for i in xrange(len(name)):
        if i != 0 and name[i].isupper():
            self_name = self_name[:i + offset] + ' ' + self_name[i +
offset:]
            offset += 1

    return self_name

name = "GeneralPacketMeToo"
print a(name)


>>>
General Packet Me Too
>>>

On Thu, May 8, 2008 at 7:04 PM, Eric Wertman <ewertman at gmail.com> wrote:

> Something like this.  I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
>        return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr =  re.sub('[A-Z]',addspace,strng)
>
> print newstr.strip()
>
>
>
> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschroed at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would
> like
> > to print out my CamelCase classes as titles.
> >
> > I would like it to do this:
> >
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
> >
> > Anyone know any easy way to do this?  Thanks.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
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From mnikhil at gmail.com  Wed May 14 14:52:53 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:22:53 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <g0fce5$g59$2@registered.motzarella.org>

Arnaud Delobelle wrote:
> Nikhil <mnikhil at gmail.com> writes:
> 
>> Hi,
>>
>> I am reading a file with readlines method of the filepointer object
>> returned by the open function. Along with reading the lines, I also
>> need to know which line number of the file is read in the loop
>> everytime.
>> I am sure, the line should have the property/attribute which will say
>> the line number of the file.
>>
>> If there is none, do I have to end up using the counter in the loop?
>>
>> fp = open("file", "r")
>> lineno = 0
>> for line in fp.readlines():
>> 	print "line number: " + lineno + ": " + line.rstrip()
>>         lineno = lineno + 1
> 
> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 
Oh I did not know enumerate can be used. Thanks Paul and Arnaud.
I will try this.


From daveparker at flamingthunder.com  Tue May 13 13:33:01 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:33:01 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
Message-ID: <0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>

> You sound like a commercial.

Get Flaming Thunder for only $19.95!  It slices, it dices!

> And while programs and libraries written in assembly may be twice as fast
> as programs and libraries written in C, ...

It's a myth that they're only twice as fast.  An experienced assembly
language programmer can usually get out at least a factor of 5 by
using tricks such as cache-coherence, carry flag tricks, stack
manipulations, etc.

> ... they're real hell to maintain.

That's also a myth.  For example, if C is easy to maintain, why is
Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
the world?  There should be lots of single-asset 8-by-8 shotgun cross
compilers written in C, if C is easier to maintain.

Here's one of the tricks I use:  I wrote an assembly language
preprocessor that takes 1 assembly language source file and generates
the library code for the 8 different target platforms.  That's much
easier than maintaining quirky C code across 8 different platforms --
which is why GCC's support for cross-compilation is often so broken.

On May 13, 10:57?am, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> You sound like a commercial. Is this your way of attracting costumers of FT?
>
> 2008/5/13 Dave Parker <davepar... at flamingthunder.com>:
>
> > > 5-10 times faster for what kind of code?
>
> > ?Mostly numerical analysis and CGI scripting. ?All of Flaming Thunder's
> > ?library code is in assembly language, and Flaming Thunder creates
> > ?statically-linked pure syscall CGI scripts.
>
> > ?> I don't see anything that resembles OO features of python, ...
>
> > ?True. ?But in Python, you don't see statically-linked pure-syscall CGI
> > ?scripts being cross-compiled under Windows for ftp'ing up to a Linux
> > ?server. ?And you don't see the speed of pure assembly language
> > ?libraries.
>
> I see your assembly language libraries and raise you C language libraries. :)
> Python libraries have the speed of pure C language libraries. And
> while programs and libraries written in assembly may be twice as fast
> as programs and libraries written in C, they're real hell to maintain.
> But that doesn't stop you from telling us, that:
>
> > ?And I'll be willing to bet that Flaming Thunder will have
> > ?OO features similar to Python before Python has the features that
> > ?Flaming Thunder already does.
>
> Well, we'll see. But, IMHO, this is highly unlikely.
>
> > ?For many people, being 5 to 10 times faster at numerical analysis and
> > ?CGI scripting is reason enough to pay $19 per year. ?But maybe for
> > ?other people, having slow, inefficient programs and websites is
> > ?acceptable.
>
> Yeah, right, Python is sooooo slow. :) Show us some sites and programs
> that were written in FT.
>
>
>
> > ?> And what is really expensive is brain-cycles, not cpu-cycles.
>
> > ?Depends on whether you're the programmer, or the customer. ?I've found
> > ?that customers prefer products that are 5 to 10 times faster, instead
> > ?of products that were easy for the developer.
>
> If I'm customer, than why should I care about FT?
> If I'm a programmer, I'd better care about brain-cycles.
>
>
>
> > ?And I disagree that Flaming Thunder requires more brain-cycles.
> > ?Because it's based on leveraging existing English and math fluency
> > ?(which was one of the original goals of Python, was it not?), I think
> > ?that Flaming Thunder requires fewer brain-cycles because fewer brains
> > ?cells have to be devoted to memorizing language peculiarities.
>
> Not everybody has grown in English-speaking community, you know. And
> knowing math quite good, I prefer writing "x = y" instead of "Set x to
> y".
>
>
>
>
>
>
>
> > ?> Let alone it is
> > ?> very much a question of view-point if two different looping constructs or
> > ?> keywords are more awkward than one general looping-concept with only one
> > ?> keyword. It's a matter of taste.
>
> > ?Perhaps. ?But if elementary school students can easily understand why
> > ?one programming language gives the answer 100 (Flaming Thunder):
>
> > ? Write 10^2.
>
> > ?but can't understand why another programming language gives the answer
> > ?8 (Python):
>
> > ? Print 10^2
>
> > ?then I think the comparison moves beyond a matter of taste into the
> > ?realm of measurable ease-of-use.
>
> '^' is a bitwise XOR. Python uses "x**y" for raising x to power of y.
> What's your point here?
>
>
>
>
>
>
>
> > ?On May 13, 9:50 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > ?> > Also, several users have rewritten their Python programs in Flaming
> > ?> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > ?> > (Flaming Thunder compiles to native executables). ?So again, since
> > ?> > many people value their time at more than $0, I think that many people
> > ?> > will find that Flaming Thunder is worth $19.95 per year.
>
> > ?> 5-10 times faster for what kind of code? I don't see anything that resembles
> > ?> OO features of python, let alone more advanced concepts like
> > ?> meta-programming, higher-order functions and such. Which save tremendous
> > ?> amounts of time coding. If FT grows these and *still* is 5-10 times faster,
> > ?> I'll salut you.
>
> > ?> And what is really expensive is brain-cycles, not cpu-cycles. Which above
> > ?> described features save.
>
> > ?> > Plus, me getting paid to work on Flaming Thunder is far more
> > ?> > motivating than me not getting paid to work on Python. ?This weekend,
> > ?> > Python users will still be debating how to fix awkwardnesses in the
> > ?> > languages (such as FOR loops where you're just counting the loops and
> > ?> > not referencing the loop variable) -- but Flaming Thunder users will
> > ?> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > ?> > implementing.
>
> > ?> > Python has been around about 15 years, yet still has those
> > ?> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > ?> > those awkwardnesses are already getting fixed. ?The difference: I
> > ?> > can't afford to ignore users.
>
> > ?> Oh *please*! Try getting nearly as feature & library complete as python is
> > ?> today - and *then* I'll point to all the akwardness of FT. Let alone it is
> > ?> very much a question of view-point if two different looping constructs or
> > ?> keywords are more awkward than one general looping-concept with only one
> > ?> keyword. It's a matter of taste.
>
> > ?> Diez
>
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -



From deets at nospam.web.de  Tue May 27 12:08:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 18:08:05 +0200
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <6a2q04F35ab70U1@mid.uni-berlin.de>

> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.

And creating a fork makes it easier?
 
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it

Again - creating a fork makes that better?

> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.

This is a castironpi-esque metaphor. Guess what, I have an ever older one:
the wheels used by roman circus race wagons essentially look the same as on
a formula one car. Round, with a hub in the middle.

Now how about you throw that computers of your out of the window because it
is technology not available in ancient rome, and as change is bad according
to your view- away with it!
 
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
> 
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business

Again: how is that going to help?

You argue that a *fork* is what helps mitigating the problems *a fork called
Py3K* introduces (in your opinion). Now why do you think your company is
more likely to adopt the language "Sverker Nilsson his own fork of Python
that no one else cares about and that won't be supported" - short
SNHOFOPTNOECAATWBS?

If you don't like change - stick to python 2.5. Or whatever suits you. 

For the umpteenth time: how is that going to help you with your "don't
change" issues?

Diez


From inhahe at gmail.com  Mon May 26 15:43:36 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:43:36 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <hoE_j.50548$7a.47091@bignews1.bellsouth.net>

I like to think of a language that would combine low-level and high-level 
features to be used at the programmer's whim.  C--, High Level Assembly, and 
C++ with in-line assembly are examples, but none of them come as high-level 
as Python. Other possible examples might be ctypes, numpy, array.array, and 
I heard a rumor that Python 3.0 might have optional type declarations.   My 
ideal language would be like a version of C++ (including in-line asm), or 
C-- with classes, that's compiled, but supports Python abstractions and 
features wherever possible (including doing away with {}'s and ;'s).

>
> what is crazy about it?
>
> in the same way programming webapps in C would be annoying because you
> have to do a lot of lowlevel tasks it is dumb to program computer ina
> highlevellanguage because you dont have direct access to lowlevel
> tasks meaning you cant program it very efficiently, ie make it fast? 




From http  Sun May 25 18:14:23 2008
From: http (Paul Rubin)
Date: 25 May 2008 15:14:23 -0700
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
Message-ID: <7xy75ym3pc.fsf@ruckus.brouhaha.com>

aahz at pythoncraft.com (Aahz) writes:
> You must have poor project management/tracking.  You WILL pay the cost
> of testing, the only question is when.  The when does have an impact on
> other aspects of the development process.

Well, let's say you used TDD and your program has 5000 tests.  One
might reasonably ask: why 5000 test?  Why not 10000?  Why not 20000?
No number of tests can give you mathematical certainty that your code
is error-free.  The only sensible answer I can think of to "why 5000"
is that 5000 empirically seemed to be enough to make the program
reliable in practice.  Maybe if you used a more error-prone coding
process, or wrote in assembly language instead of Python, you would
have needed 10000 or 20000 tests instead of 5000 to get reliable code.

But then one might reasonably ask again: why 5000 tests?  Why not 2000
or 1000?  Was there something wrong with the coding process, that
couldn't produce reliable code with fewer tests?

So, I think you have to consider the total development cycle and not
treat test development as if it were free.

I also haven't yet seem an example of a real program written in this
test-driven style that people keep touting.  I use doctest when
writing purely computational code, and maybe it helps some, but for
more typical code involving (e.g.) network operations, writing
automatic tests (with "mock objects" and all that nonsense) is a heck
of a lot more work than testing manually in the interactive shell, and
doesn't seem to help reliability much.  I'd be interested in seeing
examples of complex, interactive or network-intensive programs with
automatic tests.


From deets at nospam.web.de  Mon May 26 07:52:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 13:52:51 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
Message-ID: <69vmlgF35akucU1@mid.uni-berlin.de>

nik600 wrote:

> Hi to all
> 
> i'd like to create a window that integrates a browser control, the
> browser control must support html, javascript and css.
> 
> Is possible to include something that uses the same engine of firefox?
> 
> Thanks to all in advance

What OS, what GUI toolkit?

Diez


From bronger at physik.rwth-aachen.de  Fri May  2 10:26:51 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 16:26:51 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
Message-ID: <87y76ssrx0.fsf@physik.rwth-aachen.de>

Hall?chen!

D'Arcy J.M. Cain writes:

> On Fri, 02 May 2008 23:30:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>
>> The OP was asking why people prefer on over the other. My answer
>> is that I prefer specifying "give me the default OS Python"
>> because anything not installed by the OS is to non-standardised
>> for me to worry about.
>
> [...]
>
> Certainly #! /usr/bin/python is fine if you never expect your
> software to run outside of your own little corner of the world but
> you asked why people prefer the env version and the answer is that
> we want to write software that runs everywhere that Python runs.

Granted, but you must draw the line somewhere anyway.  I cannot
pollute my program with hundreds of if clauses just to make it work
on every quirky system.  It's the *systems* where the streamlining
must happen, not the programs.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From wxPythoner at gmail.com  Sun May 11 04:10:19 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 01:10:19 -0700 (PDT)
Subject: Some error messages in Python are ugly
Message-ID: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>

This really looks ugly for an error message:

[1]+  Stopped                 python


Please explain to me the role of the '+' sign. And why is there such a
gap between 'Stopped' and 'python'?


From mcknight0219 at gmail.com  Fri May 23 02:29:43 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 22 May 2008 23:29:43 -0700 (PDT)
Subject: can python do some kernel stuff?
Message-ID: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>

Hi to all

python now has grown to a versatile language that can
accomplish tasks for many different purposes. However,
AFAIK, little is known about its ability of kernel coding.

So I am wondering if python can do some kernel coding that
used to be the private garden of C/C++. For example, can python
intercept the input of keyboard on a system level? someone told me
it's a kernel thing, isn't it?


From inhahe at gmail.com  Tue May 20 17:49:43 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 17:49:43 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
Message-ID: <OGHYj.12654$hv2.8128@bignews5.bellsouth.net>

  def __init__(self, filename, initial):

should be

  def __init__(self, filename, initial=[]):

(that was the whole reason i put the filename first.)

sorry.





From pavlovevidence at gmail.com  Tue May 27 03:23:58 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 27 May 2008 00:23:58 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>
Message-ID: <e95c5e6d-fc7b-47dc-b04e-67088a784fb4@x41g2000hsb.googlegroups.com>

On May 27, 2:37 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:
>
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python?  Not that I plan to name all my variables with hungarian notation, but just for when it's appropriate.
>
> You are likely to get some links to PEP 8 for coding style and naming
> conventions, but it turns out PEP 8 doesn't really say yay or nay on
> the Hungarian notation topic.
>
> My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
> about for "python hungarian notation" led me through some like-minded
> sites.  But I also found this entry on Joel Spolky's site (http://www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
> warns against tarring all Hungarian-type notations with the same
> brush.

The name of a variable is a valuable resource.  There are all kinds of
things you can encode in it, but you have to choose only one or two.
The most important information is what it is (e.g., box), or what it's
archetype is (i, for a counter variable).  Pretty much all names
should contain one of these two.  Second most important are
discriminators such as a description (red_box), usage (shoebox), or
circumstance (next_box).

But sometimes other things are important enough to warrant addition to
the name.  Type usually isn't one of them, but there are times when
it's helpful to know.  But then, I'm not sure I would call it
"Hungarian notation" to add ad hoc type information to a few of names
here and there.

One convention I have for myself is to use x<elementname> for elements
when I'm using ElementTree, but the reason is pragmatic: I'm creating
objects that have the same name as the elements.


> So with that article in mind, I'd have to ask, what do you mean by
> "appropriate"?

It seems like OP wanted to disambiguate two objects based on type,
which seems reasonable to me.  Sometimes you want to have side-by-side
represenations of something where type is the main difference, in
which case there's no reason type shouldn't be added to the name.


Carl Banks


From msh at blisses.org  Fri May 16 11:31:16 2008
From: msh at blisses.org (Matt Herzog)
Date: Fri, 16 May 2008 10:31:16 -0500
Subject: Python book question
Message-ID: <20080516153116.GF13079@chicago.blisses.org>

People keep telling me I need a course in "Data Structures and Algorithms."

Since Python is the only language that doesn't give me headaches I thought this book might be good. Has anyone read it or can anyone recommend the author? Can anyone recommend a better Data Structures and Algorithms book? 

The book: http://www.fbeedle.com/053-9.html

-- Matt H.

-- 
"Outside of a dog, a book is a man's best friend. Inside of a dog, it is too dark to read."   
--  Groucho Marx



From jldunn2000 at googlemail.com  Thu May 29 04:36:44 2008
From: jldunn2000 at googlemail.com (loial)
Date: Thu, 29 May 2008 01:36:44 -0700 (PDT)
Subject: Compare 2 files and discard common lines
Message-ID: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>

I have a requirement to compare 2 text files and write to a 3rd file
only those lines that appear in the 2nd file but not in the 1st file.

Rather than re-invent the wheel I am wondering if anyone has written
anything already?



From skanemupp at yahoo.se  Fri May 16 14:41:29 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 11:41:29 -0700 (PDT)
Subject: write to specific line in file?
Message-ID: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>

i ahve a program that takes certain textsnippets out of one file and
inserts them into another.

problem is it jsut overwrites the first riow every time.

i want to insert every new piece of text into the next row.
so:
1. how do i write to a new line every time i write to the file?

2. if i dont want to write to a new line but just want to insert it
after the last token in the file, how do i do then?


From M8R-yfto6h at mailinator.com  Wed May 14 21:54:31 2008
From: M8R-yfto6h at mailinator.com (Mark Tolonen)
Date: Wed, 14 May 2008 18:54:31 -0700
Subject: Using the indent method
References: <ffbc75e3-612b-4195-b9c1-11df9e66d286@f63g2000hsf.googlegroups.com>
Message-ID: <-eWdnTt5ip1PCrbVnZ2dnUVZWhednZ2d@comcast.com>


"dj" <d.a.abernathy at gmail.com> wrote in message 
news:ffbc75e3-612b-4195-b9c1-11df9e66d286 at f63g2000hsf.googlegroups.com...
> Hello All,
>
> I am using elementtree to write an XML document and I am having a hard
> time adding the correct indentation.
> I have tried using the indent method, but I can not figure out how to
> use it. Any suggestions.

Using the version of indent() found on 
http://effbot.org/zone/element-lib.htm:

>>> from xml.etree import ElementTree as ET
>>> x='<a><b /><c /><d>stuff</d><e><f /></e></a>'
>>> e=ET.fromstring(x)
>>> ET.dump(e)
<a><b /><c /><d>stuff</d><e><f /></e></a>
>>> indent(e)
>>> ET.dump(e)
<a>
  <b />
  <c />
  <d>stuff</d>
  <e>
    <f />
  </e>
</a>

-Mark 



From s0suk3 at gmail.com  Sun May  4 22:54:09 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 19:54:09 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com> 
	<05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>
Message-ID: <07c6e440-18fb-4a97-83b8-e9751bf9e56c@y38g2000hsy.googlegroups.com>

On May 4, 6:59 am, Protected <myshel... at gmail.com> wrote:
> On May 4, 12:18 pm, s0s... at gmail.com wrote:
>
>
>
> > On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > > I had previously ran the import line. I prepended it to the example
> > > code I'm trying to run every time but it did not help, still nothing
> > > happens. With or without var before 'root'. I'm pasting the code in
> > > IDLE and using Windows XP as written in the first post.
>
> > Tkinter doesn't work if you type the statements in IDLE. I don't
> > remember the specifics of it, but essentially it doesn't work because
> > IDLE is itself a Tkinter app. You have to type it at the Python
> > command line or save it in a file. BTW, if you're on Windows, you
> > should definitely check wxPython. I used to work with Tkinter,
> > struggling with it all the time only to get a lame result most of the
> > time. Then I switched to wxPython, and in the same week I was learning
> > it I did a better GUI than I ever did in Tkinter (with months of
> > work!). I feel it makes it easier to make your program have a better
> > structure and design, and thus lets you focus on the actual task of
> > the program, rather than in the GUI itself. Plus, on Windows, you'll
> > get the widgets to look more natively, like any good quality
> > application there is on Windows.
>
> Ah, but is it cross platform?
>
> (Thanks for letting me know about IDLE.)

Of course. I forgot to say about that. It is cross platform, like most
things in Python. I'd say it's actually more cross platform than
Tkinter, because of the looks of both in different platforms. In
Tkinter, you can get all the widgets to work in all the platforms it
supports, but the widgets look so different on different platforms,
that at the end you end up modifying the code anyway so that the
controls look better on the platform that you port the program to.
With what I've done with wxPython, the controls look great on any of
the platforms I've tried my programs in. Another thing: wxPython is a
port of the wxWidgets toolkit which is for C++. It has also been
ported to a bunch of other languages like Ruby, Perl, C#, etc; so if
you learn any of the languages which wxWidgets has been ported to, you
can use the toolkit in the same way that you've been doing with
Python, except that with the syntax of the other language.


From wuwei23 at gmail.com  Fri May 23 22:39:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:39:19 -0700 (PDT)
Subject: webspider, regexp not working, why?
References: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
	<mailman.1511.1211563636.12834.python-list@python.org>
Message-ID: <4f7add9e-fbcc-4418-a0f0-ef5a542e8fce@q24g2000prf.googlegroups.com>

On May 24, 3:26 am, "Reedick, Andrew" <jr9... at ATT.COM> wrote:
> c)  If you're going to parse html/xml then bite the bullet and learn one
> of the libraries specifically designed to parse html/xml.  Many other
> regex gurus have learned this lesson.  Myself included.  =)

Agreed. The BeautifulSoup approach is particularly nice (although not
part of stdlib):

>>> import urllib
>>> from BeautifulSoup import BeautifulSoup
>>> html = urllib.urlopen('http://www.python.org/').read()
>>> soup = BeautifulSoup(html)
>>> links = [link['href'] for link in soup('link')]
>>> links[0]
u'http://www.python.org/channews.rdf'

- alex23



From mail at timgolden.me.uk  Mon May 19 06:04:50 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 19 May 2008 11:04:50 +0100
Subject: Using Python for programming algorithms
In-Reply-To: <48314dd0$0$32138$426a34cc@news.free.fr>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <483150C2.3080700@timgolden.me.uk>

Bruno Desthuilliers wrote:
> 2/ actually, all known Python implementations compile to byte-code.

In curiosity, did your "actually" mean, in the French sense, "at the moment" 
or, in the English sense, "in contrast to something stated earlier"? Or maybe both?

TJG


From george.sakkis at gmail.com  Fri May  2 04:24:50 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 01:24:50 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com> 
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com> 
	<7917a0b4-7af2-46f0-adec-33d3b191eb17@y22g2000prd.googlegroups.com>
Message-ID: <423509ff-f32a-4e63-b9be-80271e70aef6@25g2000hsx.googlegroups.com>

On May 2, 2:17?am, Matimus <mccre... at gmail.com> wrote:

> On May 1, 10:50 pm, George Sakkis <george.sak... at gmail.com> wrote:
>
>
>
> > On May 1, 11:46 pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
>
> > > Yves Dorfsman wrote:
>
> > > > In the following script, m1() and m2() work fine. I am assuming m2() is
> > > > faster although I haven't checked that (loops through the list twice
> > > > instead of once).
>
> > > Well, let's check it:
>
> > > $ python -m timeit -s "import x" "x.m1()"
> > > 100000 loops, best of 3: 6.43 usec per loop
>
> > > $ python -m timeit -s "import x" "x.m2()"
> > > 100000 loops, best of 3: 8.34 usec per loop
>
> > > As it turns out, m1 is faster than m2. The reason is that list
> > > comprehensions do the loop in C, whereas the for-append pattern does the
> > > loop on the Python level.
>
> > > > Now what I am trying to do is something like m3(). As currently written
> > > > it does not work, and I have tried different ways, but I haven't managed
> > > > to make it work.
>
> > > > Is there a possibility ? Or is m2() the optimum ?
>
> > > > [...]
> > > > def m1():
> > > > ? colours = [ e['colour'] for e in l ]
> > > > ? nums ? ?= [ e['num'] ? ?for e in l ]
>
> > > > def m2():
> > > > ? colours = []
> > > > ? nums ? ?= []
> > > > ? for e in l:
> > > > ? ? colours.append(e['colour'])
> > > > ? ? nums.append(e['num'])
>
> > > > #def m3():
> > > > # ?colours, nums = [ e['colour'], e['num'] for e in l ]
>
> > > m3 doesn't work because you're building a list of 10 color/number pairs
> > > that you're trying to unpack that into just two names. The working
> > > "derivative" of m3 is m1, which is the most natural, fastest and
> > > clearest solution to your problem.
>
> > Another alternative is:
>
> > from operator import itemgetter
>
> > def m3():
> > ? ? colours, nums = zip(*map(itemgetter('colour','num'), l))
>
> > It's slower than m1() but faster than m2(); it's also the most
> > concise, especially if you extract more than two keys.
>
> > George
>
> Why deal with zip and unpacking?

DRY [1].

This seems more obvious to me:
>
> colours, nums = map(itemgetter('colour'), l), map(itemgetter('num'),
> l)

Maybe, but now extend it to three keys. And then four. And then... you
see my point.

George

[1] http://en.wikipedia.org/wiki/Don%27t_repeat_yourself


From bignose+hates-spam at benfinney.id.au  Mon May 12 03:42:52 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 17:42:52 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
Message-ID: <873aoo6k8z.fsf@benfinney.id.au>

Paddy <paddy3118 at googlemail.com> writes:

> I've used Fortran and C and so would tend to use either i,j,k as the
> unused loop variable above, or, for clarity, call it something
> descriptive like loop_count, if the loop body would be clearer.

The problem with all of these names is that they also have long
precedent as names of values that *will* be used inside the loop.

Because of the precedent of those names, choosing one of those names
doesn't make it clear to the reader that the value is never used; they
have no indication from you of that until they look over the code a
few times. It's implicit rather than explicit.

-- 
 \     "As I bit into the nectarine, it had a crisp juiciness about it |
  `\          that was very pleasurable - until I realized it wasn't a |
_o__)            nectarine at all, but A HUMAN HEAD!!"  -- Jack Handey |
Ben Finney


From castironpi at gmail.com  Wed May 14 19:54:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:54:56 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
Message-ID: <dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>

On May 14, 5:41?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> dj schrieb:
>
> > Hello,
>
> > Rather then holding my XML document in memory before writing it to
> > disk, I want to create a file object that elementtree will write each
> > element to has it is created. Does any one know how to do that ?
>
> > Here is my code so, far:
>
> > fd = open("page.xml", "w")
> > tree.write( fd, encoding="iso-8859-1")
>
> > I know there's something I am doing wrong, but I just do not know
> > what.
>
> This isn't possible. How should ET handle the case that you add a
> child-node to a node that has been rendered already?
>
> What you could try is to serialize subtrees that are closed to a stream.
>
> Diez

What do we render?


From ivan.illarionov at gmail.com  Thu May  1 10:43:30 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 14:43:30 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
Message-ID: <fvckui$303g$1@news.mtu.ru>

On Thu, 01 May 2008 08:30:03 -0500, Nick Craig-Wood wrote:

> Lance Gamet <lance at gamet.com> wrote:
>>  This project will store most of its actual data in a shared-database,
>>  but I have a small amount of user specific data that I need to be
>>  stored like configuration or preferences for example, the list of
>>  databases that the program should connect to.
>> 
>>  On Unix this might be a .file, on windows this could be in the
>>  registry, or an ini file or an xml file in ProgramData or AppData or
>>  something.
>> 
>>  Is there a pythony way to store such config data, perhaps there is
>>  already a standard python package for such a purpose?
> 
> I've found
> 
>   http://docs.python.org/lib/module-ConfigParser.html
> 
> To be easy to use and built in.  It makes human readable / editable .ini
> - like files.

IMO .ini-like config files are from the stone age. The modern approach is 
to use YAML (http://www.yaml.org). 

It has a lot of advantages over .ini and xml, YAML syntax was designed to 
be easily mapped to Python data types and is very similar to Python.

More at http://en.wikipedia.org/wiki/YAML

As for where to store it, I completely agree with Nick Craig-Wood.

-- 
Ivan


From lowell at allemansonline.com  Thu May 29 10:53:50 2008
From: lowell at allemansonline.com (Lowell Alleman)
Date: Thu, 29 May 2008 10:53:50 -0400
Subject: Custom log handler and logging.config.fileConfig()
In-Reply-To: <72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>
References: <mailman.1700.1212008047.12834.python-list@python.org>
	<72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com>
Message-ID: <839ec5810805290753o5a1c83a2ie29bb481838589cf@mail.gmail.com>

Is there any reason not to do this assignment in the "myhandler.py"
directly?  This would save a step for each application that needs to
use it.

Starting from your example, it would now look like this:

# -- myhandler.py ---
import logging.handlers

class MySpecialHandler(logging.handlers.RotatingFileHandler):
    def __init__(self, fn):
        logging.handlers.RotatingFileHandler.__init__(self, fn,
           maxBytes=2000, backupCount=3)

# Register handler in the "logging.handlers" namespace
logging.handlers.MySpecialHandler = MySpecialHandler


# -- app.py ---
import logging.handlers, logging.config
import myhandler

logging.config.fileConfig("logging.ini")
...


> Hi Lowell,
>
> I think it's OK to use the logging.handlers namespace to add your
> custom handlers - after all, the handlers namespace is for holding
> handlers other than the basic ones included in "logging". So...
>
> # -- myhandler.py ---
> import logging.handlers
>
> class MySpecialHandler(logging.handlers.RotatingFileHandler):
>    def __init__(self, fn):
>        logging.handlers.RotatingFileHandler.__init__(self, fn,
> maxBytes=2000, backupCount=3)
>
>
> # -- logging.ini ---
> [loggers]
> keys=root
>
> [handlers]
> keys=hand01
>
> [formatters]
> keys=form01
>
> [logger_root]
> level=NOTSET
> handlers=hand01
>
> [handler_hand01]
> class=handlers.MySpecialHandler
> level=NOTSET
> formatter=form01
> args=("rotating.log",)
>
> [formatter_form01]
> format=%(asctime)s %(levelname)s %(message)s
> datefmt=
> class=Formatter
>
> # -- app.py ---
> import logging.handlers, logging.config
> from myhandler import MySpecialHandler
>
> logging.handlers.MySpecialHandler = MySpecialHandler
>
> logging.config.fileConfig("logging.ini")
>
> logger = logging.getLogger("test")
>
> for i in xrange(100):
>    logger.debug("Message no. %d", i)
>
>
> should produce the expected results.
> --
> http://mail.python.org/mailman/listinfo/python-list


From marco at sferacarta.com  Mon May 12 09:27:07 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 15:27:07 +0200
Subject: Now what!?
In-Reply-To: <9GlVj.168$PE5.102@fe087.usenetserver.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
Message-ID: <NAXVj.40732$o06.8730@tornado.fastwebnet.it>

notbob wrote:

> frustrated and give up on learning programming, not really caring much for
> coding, anyway.  But, dammit, I'm gonna stick with it this time.  I'll learn
> python if it kills me!

No, it won't kill you but make you stronger ;)


From http  Sun May 11 01:38:55 2008
From: http (Paul Rubin)
Date: 10 May 2008 22:38:55 -0700
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <7xabix2yds.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.

It is pretty natural in imperative-style code.  The one thing I'd do
differently is use xrange instead of range, to avoid creating a
10-element list in memory before starting the loop.


From boblatest at googlemail.com  Wed May 21 05:38:10 2008
From: boblatest at googlemail.com (boblatest at googlemail.com)
Date: Wed, 21 May 2008 02:38:10 -0700 (PDT)
Subject: C-like assignment expression?
Message-ID: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>

Hello,

I have an if-elif chain in which I'd like to match a string against
several regular expressions. Also I'd like to use the match groups
within the respective elif... block. The C-like idiom that I would
like to use is this:

if (match = my_re1.match(line):
  # use match
elsif (match = my_re2.match(line)):
  # use match
elsif (match = my_re3.match(line))
  # use match

...buy this is illegal in python. The other way is to open up an else:
block in each level, do the assignment and then the test. This
unneccessarily leads to deeper and deeper nesting levels which I find
ugly. Just as ugly as first testing against the RE in the elif: clause
and then, if it matches, to re-evaluate the RE to access the match
groups.

Thanks,
robert


From grante at visi.com  Thu May 22 17:00:02 2008
From: grante at visi.com (Grant Edwards)
Date: Thu, 22 May 2008 16:00:02 -0500
Subject: Bug in ssl-object library reference page or in ssl-object code?
Message-ID: <zfmdnWV97o1PQ6jVnZ2dnUVZ_qninZ2d@posted.visi>

According to http://docs.python.org/lib/ssl-objects.html

  17.2.2 SSL Objects

  SSL objects have the following methods.

  read([n])
  
    If n is provided, read n bytes from the SSL connection,
    otherwise read until EOF. The return value is a string of
    the bytes read.

The behavior I observer when n is not provided doesn't agree
with the description.  When I call read(), it appears that I
get whatever data is currently available.  It does not read
until EOF.  This seems to agree with the comment on the
"example" page:

 http://docs.python.org/lib/socket-example.html

   # Read a chunk of data.  Will not necessarily
   # read all the data returned by the server.
   data = ssl_sock.read()

If read() did indeed read until EOF, then it would always
read all of the data returned by the server.

Is this a bug in the doc or in the code?

-- 
Grant Edwards                   grante             Yow! How do I get HOME?
                                  at               
                               visi.com            


From landofdreams at gmail.com  Thu May  1 01:46:24 2008
From: landofdreams at gmail.com (Sam)
Date: Wed, 30 Apr 2008 22:46:24 -0700 (PDT)
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org> 
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com> 
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
Message-ID: <6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>

> I didn't look it up myself, but maybe a __init__.py file is missing
> so that it can be recognised as a package.

No, every single one (S, B, and W) has its own __init__.py

> >> > in u.py Python gives "ImportError: No module named S".
>
> >> A silly question: is the directory that contains "S" in PYTHONPATH or
> >> in sys.path?
>
> > It's in sys.path.
>
> "S" or its parent directory?

I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?

Sam


From sjdevnull at yahoo.com  Wed May 21 15:23:14 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Wed, 21 May 2008 12:23:14 -0700 (PDT)
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org> 
	<D6udnVPRN5dPtqnVnZ2dnUVZ_qHinZ2d@posted.visi>
Message-ID: <3139388e-f453-437e-bbc3-abb10fa2d94c@2g2000hsn.googlegroups.com>

On May 21, 10:04 am, Grant Edwards <gra... at visi.com> wrote:
> Yes, C defines "char" to be one byte, but it doesn't define the
> size of a "byte" other than it's at least big enough to hold
> one character (or something like that).  In practice, a byte is
> pretty much guaranteed to be at least 8 bits.

If you're discussing standard C, you can omit "in practice" and
"pretty much".  CHAR_BITS is required to be at least 8 by the ANSI/ISO
C Standard.

> But, on some targets a "byte" is 16 bits, and on others a byte
> is 32 bits.

Yep, or 9 bits or 36 bits, or anything >= 8.


From martin at v.loewis.de  Sun May 25 16:13:26 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:13:26 +0200
Subject: set partition question
In-Reply-To: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <4839c866$0$32633$9b622d9e@news.freenet.de>

> s0 = set([1])
> s1 = set([1,2])
> s2 = set([2])
> S = set([s0,s1,s2])
> one answer we're searching for is s0 = s1 - s2
> 
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...) and arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any operation or function which
> takes and returns sets.

In that case, there is always a trivial answer. As I can use any
function which takes and returns sets, and as I shall come up with
a function that returns s0, I just use the following function

def f(s):
   return s0

To compute s0, just invoke f with any other of the sets, and you
will - get s0.

> I think this problem is related to integer partitioning, but it's not
> quite the same.

I think the problem is significantly underspecified. It would be a more
interesting problem if there was a restriction to a few selected set
operations, e.g. union, intersection, difference, and combinations
thereof.

Regards,
Martin


From corvettecraz92 at gmail.com  Sat May 31 15:28:33 2008
From: corvettecraz92 at gmail.com (corvettecraz92 at gmail.com)
Date: Sat, 31 May 2008 12:28:33 -0700 (PDT)
Subject: Question about files?
References: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>
	<INedneYt2rOlO9zVnZ2dnUVZ_qzinZ2d@earthlink.com>
Message-ID: <a9501197-1f56-4cd6-9620-408ea5ef9df8@79g2000hsk.googlegroups.com>

On May 31, 3:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sat, 31 May 2008 11:44:14 -0700 (PDT), corvettecra... at gmail.com
> declaimed the following in comp.lang.python:
>
> > I want to create a program where a user can type what ever they want
> > to, have it saved to a file, and the be able to re-open it and read
> > it. How would I do this? Thanks!
>
> import os
> os.system("edit") ? ? # may be Windows specific
>
> ? ? ? ? Start with:http://www.catb.org/~esr/faqs/smart-questions.html
>
> (or, to expand on it... Exactly what part of the task are you having
> problems with? Opening files for read/write/update? Designing a command
> set for an editor? Designing a GUI for a text editor; what toolkit, does
> it have a generic text edit widget already? Do you really need to write
> another text editor when there are so many available that come with most
> operating systems (Windows: edit, notepad, maybe even wordpad;
> UNIX/Linux type systems: vi, vim, gvim, emacs) or can be downloaded
> (SciTE) )
>
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

No, what I mean is for the user to input text directly into the python
program, then the program would save it to a file and display it after
it is created.


From saluk64007 at gmail.com  Fri May  9 11:44:21 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Fri, 9 May 2008 08:44:21 -0700
Subject: Free Memory
In-Reply-To: <g0161h$lc3$1@ger.gmane.org>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
Message-ID: <c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>

I had some very interesting results with this code to do what is asked:

for key in globals().keys():
    del globals()[key]
for key in locals().keys():
    del locals()[key]

It might be better to reverse the two steps, I didn't give it much thought.
Anyway, when this is done, all of the builtins spill into globals and locals
(since __builtin__ was deleted).  I thought that was interesting.

It did have the effect that is asked for, although there may be more
unintended consequences.  Also if any objects are attached to any of the
builtins I expect they will still be around.
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From timr at probo.com  Sun May 11 19:26:07 2008
From: timr at probo.com (Tim Roberts)
Date: Sun, 11 May 2008 23:26:07 GMT
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <h10f24p4a00pmjbe21m70u0g0gppc2e6fj@4ax.com>

wxPythoner at gmail.com wrote:
>
>If you are in the interactive prompt of the Python interpreter and you
>do this
>
>print """Testing\"""   or   print '''Testing\'''
>
>you get three dots [...] as if Python expects a code block.

...which it does.

>If you
>press Enter, you get three dots again, and again, and again... You
>can't get out of the code block with pressing the Enter key; you have
>to press Ctrl+Z (if you're in Linux) in order to get out of that code
>block, 

No, you don't.  You can also enter """ or ''' to properly close the quote.

>If you do
>
>print "Testing\"   or   print 'Testing\'
>
>you get an error, but not of you use the triple quotes. Is that a bug
>in the interpreter perhaps?

As a general rule, when you are just beginning to learn some product, it is
safe to assume that anything you see as a bug in the product is almost
certainly a flaw in your understanding of the product.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From vadim.pestovnikov at gmail.com  Thu May  1 10:07:28 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:07:28 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
Message-ID: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>

Hi all,
Please help me with my stuff.

I downloaded python 2.5.1 package from http://blastwave.org it was
compiled using Sun Studio 11 for Solaris 8 sparc.

My system is Solaris 10 sparc and I compiled using SunStudio 11
psycopg2 python binding for PostgreSQL 8.3.1.

Compilation was OK, but when I am trying to import psycopg2 I am
getting this error:

$ python
Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopg2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
60, in <module>
    from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
referenced symbol not found

Any suggestions or help will be appreciated.


From castironpi at gmail.com  Tue May 13 10:08:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:08:35 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com>
Message-ID: <dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com>

On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
> Giuseppe Ottaviano wrote:
> > def ichain(seq):
> > ????????for s in seq:
> > ????????????????for x in s: yield x
>
> > (which is often useful and I don't think it has been included in ?
> > itertools) you can iterate lazily on the file:
>
> Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> Peter

Can you color the help manual with very fine shades of off-white to
ease reading?  I was thinking a few pixels shy of red of white to
accentuate what are the class methods and which are not.  I also have
an argument that net readability would decrease, but the sample sizes
on that kind of metric are a little brinky with privacy fears around
where I'm from.  I just try to make Tron rings.


From mcknight0219 at gmail.com  Fri May 23 04:38:06 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 01:38:06 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
Message-ID: <28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>

On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> Jimmy wrote:
> > Hi to all
>
> > python now has grown to a versatile language that can
> > accomplish tasks for many different purposes. However,
> > AFAIK, little is known about its ability of kernel coding.
>
> > So I am wondering if python can do some kernel coding that
> > used to be the private garden of C/C++. For example, can python
> > intercept the input of keyboard on a system level? someone told me
> > it's a kernel thing, isn't it?
>
> http://wiki.python.org/moin/elmer

well, straightly speaking, how can I know a key is pressed on a system-
level if
using python?


From ptmcg at austin.rr.com  Tue May 27 02:37:17 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 26 May 2008 23:37:17 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <74d9c37f-807c-4aae-8ad5-db79bb3e2bd2@8g2000hse.googlegroups.com>

On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian
> notation in Python? ?Not that I plan to name all my variables with hungarian notation, but just for when it's appropriate.

You are likely to get some links to PEP 8 for coding style and naming
conventions, but it turns out PEP 8 doesn't really say yay or nay on
the Hungarian notation topic.

My own knee-jerk reaction was "Hungarian Notation Bad!" and googling
about for "python hungarian notation" led me through some like-minded
sites.  But I also found this entry on Joel Spolky's site (http://
www.joelonsoftware.com/printerFriendly/articles/Wrong.html), that
warns against tarring all Hungarian-type notations with the same
brush.

So with that article in mind, I'd have to ask, what do you mean by
"appropriate"?

-- Paul


From xahlee at gmail.com  Sat May 10 01:52:30 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Fri, 9 May 2008 22:52:30 -0700 (PDT)
Subject: implementation for Parsing Expression Grammar?
Message-ID: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>

In the past weeks i've been thinking over the problem on the practical
problems of regex in its matching power. For example, often it can't
be used to match anything of nested nature, even the most simple
nesting. It can't be used to match any simple grammar expressed by
BNF. Some rather very regular and simple languages such as XML, or
even url, email address, are not specified as a regex. (there exist
regex that are pages long that tried to match email address though)

I wrote out a more elaborate account of my thoughts here:
 http://xahlee.org/cmaci/notation/pattern_matching_vs_pattern_spec.html

----------------

After days of researching this problem, looking into parsers and its
theories etc, today i found the answer!!

What i was looking for is called Parsing Expression Grammar (PEG).

See
http://en.wikipedia.org/wiki/Parsing_expression_grammar

It seems to me it's already in Perl6, and there's also a
implementation in Haskell. Is the perl6 PEG is in a usable state?

Thanks.

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From vbgunz at gmail.com  Tue May 13 00:05:29 2008
From: vbgunz at gmail.com (vbgunz)
Date: Mon, 12 May 2008 21:05:29 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
References: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>
	<ef099531-d38a-4b98-b19a-b7f0ac5a5aae@d1g2000hsg.googlegroups.com>
Message-ID: <269346bf-b025-4d73-8a4a-8446946e956d@j22g2000hsf.googlegroups.com>

> I know you're looking for "one-on-one" help, direction, and/or
> tutelage, but since you've not received an answer (yet), here's some
> general info...

> For Decorators, have a gander at:
> ? ?http://www.ddj.com/web-development/184406073;jsessionid=QCNTPTSNXZP2W...
> ? ?http://www.ibm.com/developerworks/linux/library/l-cpdecor.html

I found the first link to decorators a while back. I didn't think much
of it and said to myself, I'd find it again. My googlefu wasn't on my
side this time so I thank you for bringing it to my attention again.
Very very good article. Cleared up some confusion on decorators and I
am much better and sharper at them.

I think what makes the *idea* of a decorator so hard is how *simple*
it really is. From my learning them so far, I know for a fact, I've
encountered situations in which decorators would have saved me from
headache and grief. Now, an excellent piece of ammo for the arsenal.

Lets see if I could explain a decorator in my own words. a decorator
is just a pattern e.g., nothing magical about them except for the
syntactical sugar '@'. The @func sugar is nothing more than a hook
that embeds the following function into the @func first argument
(similar to self or cls) AND then Python *implicitly* reassigns the
original function name to that of the decorator which enclosed it.
From this point out it's pretty much a closure or the wider known
factory function but the real essence of a decorator that can make it
a better closure is how *unobtrusive* it is at modifying a function
*without* actually manually rewriting the original function. Also, the
decorator hook '@' reduces duplication and makes explicit the idea
that a function is to be *decorated*.

I may have some terminology wrong but think I am actually getting the
hang of decorators. very very useful indeed. I have some stuff working
without a hitch though still a bit foggy on passing *args, **etc.
Well, not that I plan on using them for everything but I've already
experienced cases in which I know a decorator would have saved my ass.
Am so glad I took the time out to learn them. I'll learn them again
tomorrow and go over all the links you provided to me.

Larry, thank you for the links, I really appreciate them. If you or
anyone have any tips or more links on some good articles regarding
them, I would surely enjoy seeing them.

Now, class methods. What is one powerful common use case for them?
What is one thing they can do in which could perhaps be the sole
reason for their existence?

heh. I'll get them too :)




From workitharder at gmail.com  Wed May 21 20:21:09 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 17:21:09 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
Message-ID: <68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>

On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>
> > what are the simple ways?
> > I could think of os.open(), os.exec(touch file)
>
> > are there any simpler methods?
>
> Just use os.path.exists to check for file existence and open() as
> replacement for touch.
>
> >>> import os
> >>> if not os.path.exists('file'):
>
> ...     open('file', 'w').close()
> ...
>
>
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib/

As simple as it gets is a single builtin function call:

open("somefile.txt", "a")

Leave out the ,"a" if you don't mind blanking a pre-existing file.


From papapep at gmail.com  Fri May 30 08:24:57 2008
From: papapep at gmail.com (Josep)
Date: Fri, 30 May 2008 14:24:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
Message-ID: <1212150297.18549.5.camel@awacs>

I'm playing with an application framework (or kinda) that's developed
with python, and it throws this error:


> File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
>     sql = unicode(sql, self.Encoding)
> LookupError: unknown encoding: utf_8_euro

At the application (DABO) mailing list, they have pointed that this has
to be a Python issue. As I'm a totally python newbie, I would ask if
somebody has experimented this kind of error, and if there is any known
solution. I've found no clue searching at Google right now.

My Python version is 2.5.2, Ubuntu Hardy .deb package.

Thanks in advance for your help.

-- 

Josep S?nchez
[papapep]
----------------------------------
http://extralinux.net
----------------------------------
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From bruno.desthuilliers at gmail.com  Wed May  7 18:12:26 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:12:26 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com> 
	<mailman.716.1210187999.12834.python-list@python.org>
Message-ID: <40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>

On 7 mai, 21:19, Daniel Marcel Eichler <onsen-n... at gmx.net> wrote:
> Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:
>
> > If so, then it looks like an Interface is a generic class with method
> > stubs. You can do that with Python just as easily by creating empty
> > methods with just the "pass" keyword.
>
> Well, no. It's a litte different. Interfaces force to implement methods.
> Simple inheritance with method-stubs can't garantee that a specific
> method is reimplementat in a sub-class.

And Java's "Interface" wart can't garantee that a specific method is
*appropriately* implemented. One often sees do-nothing methods in Java
code - useless boilerplate code that's only here to satisfy the
compiler. It's just like Java's "checked exception" mechanism : one
very often sees do-nothing catch-all try/catch blocks in Java - which
is way worse than just letting the exception propagate. I find all
this totally pointless, because there's just no way for a compiler to
check if your code is logically correct.

> Interfaces work at
> compile-time, while method-stubs raise at their first call, so in worst
> case, never.

And then ? If it's never called, why bother implementing it ?

Here again, I don't see the point of compile-time checking.
RuntimeError is a well-known Java exception, so the fact is that Java
forces you into either rigid designs or overly complex workarounds
(best knowns as "design patterns"), without even being able to
garantee anything wrt/ correctness nor even safety. Not that static
typing by itself is necessarily bad - as usual, there's a balance
between somewhat conflicting goals -, but Java's type system
definitivly is (bad).

(snip)
> That's the point. Interfaces garantee that a duck is a duck, an not only
> a chicken that quack.

Who cares if it's a chicken as long as it quacks when you ask her to ?
Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon May 19 15:53:18 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 19 May 2008 21:53:18 +0200
Subject: Thread output with ncurses
References: <d103c7c3-1e62-4390-ba85-7142b39c9b01@r66g2000hsg.googlegroups.com>
Message-ID: <69e45eF31tjn1U1@mid.individual.net>

blaine wrote:

> The idea would be that the application simply has three 'windows'
> or 'pads' and each thread would output to their respective one. 

I don't know much about ncurses, but I suggest you better use
multiple processes (subprocess module).

Regards,


Bj?rn

-- 
BOFH excuse #434:

Please state the nature of the technical emergency



From arnodel at googlemail.com  Wed May 14 16:44:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 21:44:51 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
Message-ID: <m2od78aa4c.fsf@googlemail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> __new__ is a static method!
>
> __new__ is a special-cased staticmethod that  1/ must not be declared
> as such and 2/ takes the class object as first args. As far as I'm
> concerned, it's semantically a classmethod.

It's a static method!

-- 
Arnaud


From castironpi at gmail.com  Tue May 13 11:28:26 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:28:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <8fb7373c-e8ee-4eeb-9549-d17ac25a1ec6@c65g2000hsa.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

How come no one said lightning?


From sjmachin at lexicon.net  Tue May 13 16:57:09 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 20:57:09 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <Apb*6NNcs@news.chiark.greenend.org.uk>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk>
Message-ID: <482a00a2@news.mel.dft.com.au>

Matthew Woodcraft wrote:
> Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>> I would like to write a similar problem without this non-programming  
>> distracting issues (that is, a problem simple enough to be answered in a  
>> few minutes, that requires only programming skills to be solved, and  
>> leaving out any domain-specific knowledge).
> 
> Another reason not to like the FizzBuzz example is that it's quite
> closely balanced between two reasonable approaches (whether to just
> special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
> add the Fizz and the Buzz together in that case). The interviewee might
> reasonably guess that this distinction is what's being tested, and get
> unnecessarily stressed about it.
> 

For such a trivial problem, fifteen minutes is more than enough to 
present alternative answers. Perhaps the intention is to weed out those 
who do become unnecessarily stressed in such circumstances. Employers 
like to play tricks to see how interviewees respond e.g. hand over two 
pages of a listing of code in language X, announce that there are 10 
syntax errors, and ask the interviewee to find and circle all the syntax 
errors. Correct answer: 11 circles.


From stefan_ml at behnel.de  Sat May 17 11:17:29 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 17 May 2008 17:17:29 +0200
Subject: Getting elements and text with lxml
In-Reply-To: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
Message-ID: <482EF709.3000604@behnel.de>

J. Pablo Fern?ndez wrote:
> I have an XML file that starts with:
> 
> <vortaro>
> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> <kap>
>   <ofc>*</ofc>-<rad>a</rad>
> </kap>
> 
> out of it, I'd like to extract something like (I'm just showing one
> structure, any structure as long as all data is there is fine):
> 
> [("ofc", "*"), "-", ("rad", "a")]

    >>> root = etree.fromstring(xml)
    >>> l = []
    >>> for el in root.iter():    # or root.getiterator()
    ...     l.append((el, el.text))
    ...     l.append(el.text)

or maybe this is enough:

    list(root.itertext())

Stefan


From ma.saeedi at gmail.com  Thu May  8 12:12:57 2008
From: ma.saeedi at gmail.com (Maryam Saeedi)
Date: Thu, 8 May 2008 11:12:57 -0500
Subject: Running a python code periodically
In-Reply-To: <237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
	<237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
Message-ID: <ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>

Can you please explain it a little more? I do not have that much experience!
I really appreciate it if you can share a sample code if you have one.

Thanks

On Thu, May 8, 2008 at 11:07 AM, Amitabh Saikia <saikia at unspokenmind.net>
wrote:

> write a bash script(to run your program at intervals) and run the bash
> script with nohup
>
> - saikia at unspokenmind.net
>
> On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:
>
>> I was wondering if you know how can I run a python code once every five
>> minutes for a period of time either using python or some other program like
>> a bash script.
>>
>> I have asked this question before and some of you answered me but I still
>> have problem. Most of the answers was to use cron and crontab which works on
>> my computer but not if I want to do it on department's computer since I do
>> not have permission to change those files. Is there any other way which does
>> not need administrator permission?
>>
>> Thanks  a lot,
>>
>> Maryam
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>


-- 
Maryam Saeedi
PhD student
Economics Department
University of Minnesota
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From straton at lampsacos.demon.co.uk  Sat May 10 08:14:03 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sat, 10 May 2008 13:14:03 +0100
Subject: Authoring SOAP and WSDL
Message-ID: <g043ie$od9$1$8300dec7@news.demon.co.uk>

I would like to write SOAP services in python,
and have an environment that will then generate
a matching WSDL for me automatically.

Does such a thing exist in python?

Thanks in advance.

Ken.




From caca at mailinator.com  Sat May 31 07:56:17 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Sat, 31 May 2008 04:56:17 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>
Message-ID: <a010c07d-957a-494d-bbde-ece337250dd3@t54g2000hsg.googlegroups.com>

I meant it prints 4, which means the value of test is modified by the
access to the dict

> test=5
> __IPYTHON__.user_ns['test']=4
> print test #prints 4
>



From wuwei23 at gmail.com  Sun May 11 09:50:13 2008
From: wuwei23 at gmail.com (alex23)
Date: Sun, 11 May 2008 06:50:13 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <d5f25cff-bff2-4719-a8e6-4e87970983b7@y22g2000prd.googlegroups.com>

On May 11, 10:54 pm, wxPytho... at gmail.com wrote:
> I thought that just putting a value inside ( )
> would make a tuple. Apparently that is not the case.

It's not the case at all. Check out the Tuples & Sequences section in
the python docs at http://docs.python.org/tut/node7:

"A tuple consists of a number of values separated by commas"

So it's not the parentheses that define it as a tuple, but the comma.

>>> my_tuple = 1,
>>> my_tuple
(1,)
>>> type(my_tuple)
<type 'tuple'>

Hope this helps.

- alex23


From yves at zioup.com  Wed May  7 19:40:26 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Wed, 07 May 2008 23:40:26 GMT
Subject: class definition
Message-ID: <K5rUj.249337$pM4.157639@pd7urf1no>

Does it make a difference if you put subclass object or not ?

What is the difference between c1 and c2 here:

class c1:
   pass

class c2(object):
   pass



Thanks,

Yves.
http://www.SollerS.ca


From alangrow at gmail.com  Sat May 17 15:32:44 2008
From: alangrow at gmail.com (alan)
Date: Sat, 17 May 2008 12:32:44 -0700 (PDT)
Subject: waiting on an event blocks all signals
Message-ID: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>

This ignores CTRL-C on every platform I've tested:

python -c "import threading; threading.Event().wait()"
^C^C^C^C

It looks to me like all signals are masked before entering wait(). Can
someone familiar with the internals explain and/or justify this
behavior? Thanks,

-Alan


From arnodel at googlemail.com  Sun May  4 03:10:40 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 04 May 2008 08:10:40 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
Message-ID: <m2myn6lf2n.fsf@googlemail.com>

dave <squareswallower at invalid.com> writes:

> Hello,
>
> I made a function that takes a word list (one word per line, text
> file) and searches for all the words in the list that are 'shifts' of
> eachother.  'abc' shifted 1 is 'bcd'
>
> Please take a look and tell me if this is a viable solution.
>
> def shift(word, amt):
> 	ans = ''
> 	for letter in word:
> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> 	return ans

In Python, if you want to build a string from lots of parts you can
use ''.join(parts).  I think it is considered more efficient.


>
> def fileshift(x):
> 	fin = open(x)
> 	d = {}
> 	for line in fin:
> 		d[line.strip()] = [1]
> 		for i in range(1, 26):
> 			ite = shift(line.strip(), i)
> 			if ite in d:
> 				print ite
>


You could write:

       line = line.strip()

after your for line in fin: statement, rather than strip the line twice.

Let me suggest a different solution base on the str.translate() method

from string import lowercase, maketrans

shifted_lowercase = lowercase[1:] +lowercase[0]
table = string.maketrans(lowercase, shifted_lowercase)

def shift1(line):
    return line.translate(table)

def fileshift(path):
    lines = set()
    for line in open(path):
        lines.add(line)
        for i in xrange(25):
            line = shift1(line)
            if line in lines:
                print line

(untested)

-- 
Arnaud


From ivan.illarionov at gmail.com  Sat May  3 14:04:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 18:04:50 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <fvi9g2$13m6$1@news.mtu.ru>

On Sat, 03 May 2008 18:50:34 +0200, Szabolcs Horv?t wrote:

> I did the following calculation:  Generated a list of a million random
> numbers between 0 and 1, constructed a new list by subtracting the mean
> value from each number, and then calculated the mean again.
> 
> The result should be 0, but of course it will differ from 0 slightly
> because of rounding errors.
> 
> However, I noticed that the simple Python program below gives a result
> of ~ 10^-14, while an equivalent Mathematica program (also using double
> precision) gives a result of ~ 10^-17, i.e. three orders of magnitude
> more precise.
> 
> Here's the program (pardon my style, I'm a newbie/occasional user):
> 
> from random import random
> 
> data = [random() for x in xrange(1000000)]
> 
> mean = sum(data)/len(data)
> print sum(x - mean for x in data)/len(data)
> 
> A little research shows that Mathematica uses a "compensated summation"
> algorithm.  Indeed, using the algorithm described at
> http://en.wikipedia.org/wiki/Kahan_summation_algorithm gives us a result
> around ~ 10^-17:
> 
> def compSum(arr):
>      s = 0.0
>      c = 0.0
>      for x in arr:
>          y = x-c
>          t = s+y
>          c = (t-s) - y
>          s = t
>      return s
> 
> mean = compSum(data)/len(data)
> print compSum(x - mean for x in data)/len(data)
> 
> 
> I thought that it would be very nice if the built-in sum() function used
> this algorithm by default.  Has this been brought up before?  Would this
> have any disadvantages (apart from a slight performance impact, but
> Python is a high-level language anyway ...)?
> 
> Szabolcs Horv?t

Built-in sum should work with everything, not just floats. I think it 
would be useful addition to standard math module. 

If you know C you could write a patch to mathmodule.c and submit it to 
Python devs.

-- 
Ivan


From kyosohma at gmail.com  Mon May 26 17:18:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 26 May 2008 14:18:16 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
Message-ID: <0c2af756-7edb-4cd1-9972-2250090c65ad@m73g2000hsh.googlegroups.com>

On May 26, 2:06?pm, Gandalf <goldn... at gmail.com> wrote:
> I use WX on windows XP and I try to generate an event when the user is
> clicking the keyboard while the application frame is not in focus.
> All I manged to do were while the application frame is in focus
> Can someone please show me how to do it?
>
> Thanks !

You can only catch the keyboard events for whichever widget is in
focus. So, if you have a text control, you'll need to bind to that.
The events you're likely need are EVT_KEYDOWN or EVT_CHAR. You cannot
catch keyboard events with wx if you are using MS Word. For that sort
of thing,you'll have to hook in at the OS level.

Mike


From tjreedy at udel.edu  Tue May 27 02:28:25 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 02:28:25 -0400
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com><ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
	<mailman.1594.1211780280.12834.python-list@python.org><f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9@z16g2000prn.googlegroups.com>
Message-ID: <g1g9m8$ah3$1@ger.gmane.org>


"alex23" <wuwei23 at gmail.com> wrote in message 
news:b38b30a9-dbe1-4a78-ba14-7fc36ae20bf9 at z16g2000prn.googlegroups.com...
| On May 26, 7:21 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
| > But I'd read that Python 3 is very different in many important ways.
| > I read it right there on the Py3K site!  I can't make sense of how,
| > why, even what, exactly, but that's not a misimpression on my part, I
| > certain nonetheless...it's not just cosmetic changes but important
| > ones pertaining to a sort of "linguistic logic" I gather....

One important different for beginners is the elimination of old ways that 
no longer need be learned.  Another is that a few inconsistencies have be 
ironed out.

| Well, let's see what Guido says about the issue:
|
| Q. I want to learn Python. Should I learn Python 2.6 or Python 3.0?
|
| A. Definitely learn Python 2.x (the latest version out is 2.5). I
| expect it'll be two years before you'll need to learn Python 3.0, and
| the differences aren't that great from a beginner's perspective: most
| of what you'll learn about 2.x will still hold about 3.0.
|
| (from http://www.artima.com/weblogs/viewpost.jsp?thread=211200)

My personal view is a little different.  Learn 3.0 unless you have a reason 
to learn 2.x (and there are many possible ;-).  Guido wrote the above 
nearly a year ago, before either existed to be learned.  As it turned out, 
a decision was made to backport most of the new features of 3.0 into 2.6 to 
ease the transition.  Consequently, 2.6 is in some sense the union of 2.5 
and 3.0, so that there is more to learn.  This is not a problem for Guido, 
but I can easily imagine that the extra duplication of function might be 
for a new learner, let alone someone like me who liked Python for its 
relative smallness.  I personally have no perceived need and hence no plans 
to ever touch 2.6.  So, depending on circumstances, again, I might suggest 
2.5 instead of 2.6.

tjr





From dotancohen at gmail.com  Thu May  8 18:56:52 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Fri, 9 May 2008 01:56:52 +0300
Subject: Write a python blog/website?
In-Reply-To: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
Message-ID: <880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>

2008/5/8 sharpshoot <Sumon.Sadhu at gmail.com>:
> Hi Guys,
>
> I thought this would be really interesting to people who blog who
> might be able to help us.

Your proposal very well may be interesting to those who might be able
to help you, yet, you dug your own grave by spamming the Python list.
I see that your intentions were honest, but your post was unsolicited
advertising, and off-topic at that.

I don't 'blog'. I write web content. I have rather impressive traffic
at some sites and your advertising seems to fit at least two or three
medium-traffic sites I maintain. I won't experiment with the
advertising on the large sites until I see results at the smaller ones
first. However, snaptalent.com stands out as a spammer. I most
certainly will not do business with spammers, and I am willing to
sacrifice my bottom line to avoid making spammers richer. That's too
bad, as there are many more effective ways that you could have reached
me and others like me. The two or three fish you will net spamming the
python list will not be worth your bad name, I assure you.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From bignose+hates-spam at benfinney.id.au  Sat May 24 01:01:56 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 15:01:56 +1000
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
Message-ID: <87mymgb8hn.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > Can you tell us exactly which programs you mean when you say "the
> > shell" and "the commandprompt"?
> 
> commandprompt = windows dos-windows
> 
> shell = standard python interactive prompt

Thanks.

Be aware that referring to "the shell" without further qualification
is usually understood to mean "the operating system shell", i.e. the
command shell provided for running operating system commands.

So, you're asking about the difference in behaviour between "the
Windows command shell" versus "the Python interactive shell".

-- 
 \        ?I cannot conceive that anybody will require multiplications |
  `\          at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
_o__)                                                      Wales, 1936 |
Ben Finney


From wizzardx at gmail.com  Sun May  4 08:21:47 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:21:47 +0200
Subject: Script Optimization
In-Reply-To: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
Message-ID: <18c1e6480805040521w2756b4eehef4d456837aa875@mail.gmail.com>

On Sun, May 4, 2008 at 4:43 AM, lev <levlozhkin at gmail.com> wrote:
> Can anyone provide some advice/suggestions to make a script more
>  precise/efficient/concise, etc.?

Hi, I started tidying up the script a bit, but there are some parts I
don't understand or look buggy. So I'm forwarding you the version I
have so far. Look for the comments with my e-mail address in them for
more information.

If I have time I'll tidy up the script some more when I have more info
about those issues.

Here are the changes I made to your version:

* Remove newlines introduced by email
* Move imports to start of file
* Change indentation from 8 spaces to 4
* Move main() to bottom of script
* Remove useless "pass" and "return" lines
* Temporarily change broken "chdir" line
* Split lines so they fit into 80 chars
* Add spaces after commas
* Use path.join instead of string interpolation
* rename rename() to rename_md5() because rename() shadows a function
imported from os.
* Rename vars shadowing imported names
* Improve logic for checking when to print help
* Create emtpy md5 listing file if one doesn't exist
* Add a comment for a dodgy-looking section

David.


From info at thegrantinstitute.com  Mon May 19 04:23:07 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 19 May 2008 01:23:07 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Manchester,
	New Hampshire)
Message-ID: <20080519012307.C192D0F458864B79@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080519/4b9d68f8/attachment-0001.html>

From castironpi at gmail.com  Tue May 13 10:01:08 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:01:08 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <6c34f3a3-88fa-4519-b624-34a4589d2424@c65g2000hsa.googlegroups.com>

On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?
>
> Tron! That's one I haven't seen in awhile. I'll have to take a mental
> note to rent the movie again someday. I always thought a game based on
> the movie hackers would be cool. Actually not based on the movie
> itself, but on that 3D computer world they kept breaking into. Ah man,
> it's so funny looking back on that film. Gibson, that's what they
> called it. It was like a 3D database. That in itself wouldn't make a
> very good game, but I suppose one could easily be created around that
> idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> trapped in this 80's looking 3D world that has access to all the
> world's information. More stuff could be thrown in to make it more
> interesting. And of course, there would have to be hidden references
> or parodies to whatever movies inspired it.
>
> Good luck with your project
>
> Sincerely,
> Joshua
>
> On May 13, 9:02?am, castiro... at gmail.com wrote:
>
>
>
> > Hi all.
>
> > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > Now to repeat the subject line. ?I'm stuck in Python.
>
> > Now that was fun. ?I will also try to enumerate simple screen savers
> > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > "overunity", such that one person can't be at liberty to live, which
> > in some technical political arenas would be an "anarchy", but there
> > are sufficiently many of those that I will too.
>
> > Does anyone want such a list, or if not, is it at least fun and
> > recreational to make it? ?The dollar would come along the lines of
> > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > and peaceable. ?(As the above would show, you would be free to
> > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > Guido getting his fair share? ?I am prepared to share with him.)
> > Check in his name.
>
> > I want to try to ally with other programmers and make cool games, like
> > Tron, that one party can make games for on a console, such as live
> > obstacles, incl. tear-down, and certain people have to play from time
> > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > of time. ?Very summer.
>
> > Resemblances would include Dungeons & Dragons with multi-host, or
> > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > attractive (duh). ?As for voice, it's not clear it's the most
> > entertaining, but I just don't have a mic.
>
> > However, forseeing, I return with sailing, but that's in 3-space and
> > not even in code, as though we'd construct the Royal Navy and battle.
> > But I think we can keep it well.
>
> > Thing is, someone has to play it to keep a synch (keep from falling),
> > and tap-outs would have to live.
>
> > Side note: In political theory, this is known as the problem of
> > nominating a successor. ?Would it stay afloat, even for long enough to
> > make it worth the negatives, yes which do include tear-down and fall,
> > invasion of privacy, and rights infrigement?
>
> > I code in Python (get the callbacks), but configurable servers could
> > spread the work out, using relays to put each person on each's own
> > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > c-l-py is the appropriate place to start such a thing, both and ask if
> > it's been done before.- Hide quoted text -
>
> - Show quoted text -

My bot just tries to take control and lead.  (The bot that I'm
writing!)  However, it is amusingly unsuccessful.  We see in lines, so
the game would be pretty primitive, but I'm not sure that everything
else isn't merely too exciting, such that Tron wouldn't be monkey-in-
the-middle, or king of the hill, of fun.  I'm just not on a hill, so
someone else would have to try to play it with me online!


From jamesd at echeque.com  Mon May 19 23:57:26 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 13:57:26 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
Message-ID: <qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>

> > 1.  Looks to me that python will not scale to very large programs,
> > partly because of the lack of static typing, but mostly because there
> > is no distinction between creating a new variable and utilizing an
> > existing variable,

Ben Finney 
> This seems quite a non sequitur. How do you see a connection between
> these properties and "will not scale to large programs"?

The larger the program, the greater the likelihood of inadvertent name
collisions creating rare and irreproducible interactions between
different and supposedly independent parts of the program that each
work fine on their own, and supposedly cannot possibly interact.

> These errors are a small subset of possible errors. If writing a large
> program, an automated testing suite is essential, and can catch far
> more errors than the compiler can hope to catch. If you run a static
> code analyser, you'll be notified of unused names and other simple
> errors that are often caught by static-declaration compilers.

That is handy, but the larger the program, the bigger the problem with
names that are over used, rather than unused.

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From darcy at druid.net  Fri May 16 11:52:14 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 11:52:14 -0400
Subject: Python book question
In-Reply-To: <20080516153116.GF13079@chicago.blisses.org>
References: <20080516153116.GF13079@chicago.blisses.org>
Message-ID: <20080516115214.b166eac5.darcy@druid.net>

On Fri, 16 May 2008 10:31:16 -0500
Matt Herzog <msh at blisses.org> wrote:
> Since Python is the only language that doesn't give me headaches I thought this book might be good. Has anyone read it or can anyone recommend the author? Can anyone recommend a better Data Structures and Algorithms book? 
> 
> The book: http://www.fbeedle.com/053-9.html

I'm not familiar with the book but I poked my head in and looked at the
first example:

def squareroot(n):
    root = n/2
    for k in range(20):
        root = (1.0/2)*(root + (n / root))

    return root

Looks fine and works but I wonder about the "root = n/2" line.  Since
the behaviour of this operation changes in 3.0, shouldn't it be
specific about whether it is doing int or float division?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From arnodel at googlemail.com  Wed May 14 14:45:26 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 14 May 2008 19:45:26 +0100
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
Message-ID: <m2wslwafnd.fsf@googlemail.com>

Nikhil <mnikhil at gmail.com> writes:

> Hi,
>
> I am reading a file with readlines method of the filepointer object
> returned by the open function. Along with reading the lines, I also
> need to know which line number of the file is read in the loop
> everytime.
> I am sure, the line should have the property/attribute which will say
> the line number of the file.
>
> If there is none, do I have to end up using the counter in the loop?
>
> fp = open("file", "r")
> lineno = 0
> for line in fp.readlines():
> 	print "line number: " + lineno + ": " + line.rstrip()
>         lineno = lineno + 1

The standard Python way is using enumerate()

for i, line in enumerate(fp):
    print "line number: " + lineno + ": " + line.rstrip()

-- 
Arnaud



From duncan.booth at invalid.invalid  Fri May  2 03:54:04 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 07:54:04 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <Xns9A925A80A94Eduncanbooth@127.0.0.1>

Yves Dorfsman <yves at zioup.com> wrote:

> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python
> 
> Why is one preferred over the other one ?
> 
I don't think the answers so far have communicated what I believe to be the 
important point: it isn't that one is always better than the other, it 
depends on what you are trying to achieve.

The first one runs the Python found from the environment. This means you 
can write a script and expect it to run on systems configured differently. 
You might prefer in some cases to specify a particular version of Python:

#!/usr/bin/env python2.5

The second one runs a specific copy of Python (and here it is even more 
likely that you'll want to specify a particular version). This is important 
if your program is being run as a service or some other background 
situation where the environment isn't set up. For example Subversion hooks 
all run with an empty environment, and cron jobs run with a default 
environment which may not include python (e.g. if it is in /usr/local/bin).




From johnjsal at NOSPAMgmail.com  Wed May 14 21:59:43 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 21:59:43 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>

On Mon, 12 May 2008 16:39:25 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

What an interesting and weird language! :) But I have a question concerning something like this, from the website:

----------------------------------------------------
Flaming Thunder uses set statements for assignment:

Set x to "concrete".

Flaming Thunder does not abbreviate or cojoin common English words. For example, go and to are separate words:

Read commmand.  If command = "quit" then go to end.
-----------------------------------------------------

There doesn't seem to be any consistency here. Why say:

set x to "concrete"

and then say:

if command = "quit"

Why are you using the "set...to..." terminology instead of the "=" for assignments, but then in an if test statement, you *do* use the "="???

Would it be valid to say:

x = "concrete"

or to say:

if command (is) set to "quit"

??????


From ark at acm.org  Thu May  8 12:33:19 2008
From: ark at acm.org (Andrew Koenig)
Date: Thu, 08 May 2008 16:33:19 GMT
Subject: Given a string - execute a function by the same name
References: <mailman.291.1209400412.12834.python-list@python.org>
Message-ID: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>

<python at bdurham.com> wrote in message 
news:mailman.291.1209400412.12834.python-list at python.org...

> I'm parsing a simple file and given a line's keyword, would like to call
> the equivalently named function.

No, actually, you woudn't :-)  Doing so means that if your programs input 
specification ever changes, you have to rename all of the relevant 
functions.  Moreover, it leaves open the possibility that you might wind up 
calling a function you didn't intend.

The right way to solve this kind of problem is to list all the functions you 
wish to be able to call in this way, and then explicitly define a mapping 
from keywords to the appropriate functions.  Which is exactly what you're 
doing in

> 3. Place all my functions in dictionary and lookup the function to be 
> called




From squareswallower at y1a2hoo3.com  Sat May  3 16:29:10 2008
From: squareswallower at y1a2hoo3.com (dave)
Date: Sat, 3 May 2008 14:29:10 -0600
Subject: dict invert - learning question
Message-ID: <fvihum$em7$1@news.xmission.com>

Hello,

here is a piece of code I wrote to check the frequency of values and 
switch them around to keys in a new dictionary.  Just to measure how 
many times a certain key occurs:

def invert(d):
	inv = {}
	for key in d:
		val = d[key]
		if val not in inv:
			inv.setdefault(val, [key])
		else:
			inv[val].append(key)
	return inv


Using the methods above (I'm just a beginner) could I have written it 
more concisely?  Any criticism/critique in the code would be greatly 
appreciated.

Many Thanks,

dave



From yguan08 at gmail.com  Tue May 13 17:06:13 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 14:06:13 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<m263tiapzt.fsf@googlemail.com>
Message-ID: <fac0145c-d4c1-4faa-84b9-033b74047b0a@56g2000hsm.googlegroups.com>

On May 13, 3:49?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> ygua... at gmail.com writes:
> > I have trouble of obtaining the file size of a file because the
> > fullpath exceeds 255 characters. I get this message with
> > os.path.getsize(fullpath).
>
> > fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> > \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> > \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> > \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> > Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> > fsize = os.path.getsize(fullpath)
>
> > WindowsError: [Error 206] The filename or extension is too long:
>
> > The same thing with os.stat(fullpath).
>
> > I tried using the relative path, but it does not work with the message
> > fname not found.
>
> > dir = os.path.dirname(fullpath)
> > fname = os.path.basename(fullpath)
> > os.chdir(dir)
> > filesize = os.path.getsize(fname)
>
> > Is there a walk around of this?
>
> Disclaimer: I am not a Windows user
>
> Might this help? ?http://forum.altap.cz/viewtopic.php?p=2353
>
> Alternately, use a better OS :-)
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -

I tried, but still the same error:

WindowsError: [Error 206] The filename or extension is too long: '\\\\?
\\UNC\\LOSSSFS002\\NWE_TECHNICAL\\05. UK\\Schiehallion (204_25a)\
\Amos&Burke_P559\\07. Technical (Subsurface)\\06. Well Planning\\Amos\
\Daily Reports\\Wireline\\final_204_25a_8z\\204_25a_8z\\Run_1A\
\HRLA_SP_DSI_PEX_HNGS_ECRD\\ANCILLARY\\Amos_204_25a-8Z_GR_to_surface_3-
Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las'


From tjreedy at udel.edu  Tue May 27 19:10:59 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 19:10:59 -0400
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com><m2wslf4haq.fsf@googlemail.com>
	<Kq__j.177027$ng7.15947@en-nntp-05.dc1.easynews.com>
Message-ID: <g1i4e1$26f$1@ger.gmane.org>


"Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message 
news:Kq__j.177027$ng7.15947 at en-nntp-05.dc1.easynews.com...
| Sounds good to me.  I take it that, if I don't inherit from Exception, 
various
| expected behaviors will break?  (This is what Beazley suggests...)

All builtin exceptions have been in the builtin namespace for a while.  The 
duplicate exceptions module is gone in 3.0,  In 3.0, if not before, all 
exceptions must subclass from one of the builtin exceptions.  Exception is 
the usual choice.

tjr







From denis.kasak2718281828 at gmail.com  Sun May 25 19:28:52 2008
From: denis.kasak2718281828 at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 01:28:52 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
	<mailman.1583.1211754595.12834.python-list@python.org>
	<W72dnaRymtZIcKTVnZ2dnUVZ_jydnZ2d@pdx.net>
Message-ID: <g1csnk$vtn$1@aioe.org>

Scott David Daniels wrote:
> Denis Kasak wrote:
> ...
>>>>> spam = []
>>>>> for i in range(10):
>> ...   spam.append(lambda: i)
>>>>> spam[0]()
>> 9
>>>>> spam[1]()
>> 9
>>
>> Manually creating the lambdas and appending them to a list works as
>> expected, naturally; I don't see a good reason why it wouldn't work
>> with a loop. Am I missing something?
> 
> Yes, you are missing something: binding time.  your anonymous function
> returns the value of "i" in the enclosing scope _at_the_time_of_
> _the function's_execution_.  If you follow your previous example with
> 'del i' and then execute any of your spam functions, you'll get an
> "NameError: global name 'i' is not defined".

Ah, the problem was in the subtle misunderstanding of the semantics of 
lambda functions on my part. It's much clearer now. Thanks.

> There are a couple of ways to slve your problem:
> (1) use default args to do the binding at the function definition time.
>     for i in range(10):
>         spam.append(lambda arg=i: arg)
> The lambda expression is normally spelled "lambda i=i: i)", but if you
> don't know the idiom, I find the "i=i" part confuses people.

Indeed. It hasn't occured to me that lambdas could bind the variables 
inside them by name. I guess my lambdas are still a little shaky. :-)

-- 
Denis Kasak


From myshoesbiz89 at yahoo.com.cn  Sat May  3 01:56:36 2008
From: myshoesbiz89 at yahoo.com.cn (myshoesbiz89 at yahoo.com.cn)
Date: Fri, 2 May 2008 22:56:36 -0700 (PDT)
Subject: CHINA WHOLESALE GUCCI DIOR CHANEL HANDBAGS FROM CHINA SUPPLIERS
Message-ID: <debe7937-6108-428f-b043-8305a5ed2796@s33g2000pri.googlegroups.com>


Thenikeshoes DOT net

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From irmen.NOSPAM at xs4all.nl  Sun May 18 20:52:10 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 02:52:10 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4830cf3b$0$14348$e4fe514c@news.xs4all.nl>


John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I
> think of something I might do in Python, it usually involves creating a GUI
> interface, so I was wondering what kind of work you all do with Python that does
> *not* involve any GUI work. This could be any little scripts you write for your own
> benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.

- web server/blog/wiki. This doesn't have a gui if you don't consider HTML pages a gui
- various scripts to help me during software deployment and testing
   (for instance log file analyzers, automated web clients)
- network communications library that tries hard to just get out of your way ;-)
- file processing scripts to do more sophisticated stuff than basic search/replace
- most recent script is a little tool that downloads the latest version of some 
World-Of-Warcraft addon, extracts it to the game folder after deleting the old one 
first, and then copies a backup to a network drive. I just doubleclick the .py file and 
it dumps the results in a console window that closes after a few seconds. Who needs a 
gui for that?

Also, I often find myself opening a Python prompt to just execute simple tasks that I 
see other people needing big tools or even online services for:
- base-64 encoding/decoding
- md5/sha hashing
- simple string or regular expression operations
- simple math
- unicode decoding/encoding
- etc etc.


--irmen de jong


From n00m at narod.ru  Mon May  5 06:46:33 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 03:46:33 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <b0777ae1-aa85-4257-8c03-de164442cb11@m73g2000hsh.googlegroups.com>

Hint:
for some reason in VBScript it works fine.
What makes it different, with Python?
I tried all possible ways to combine quotes, ' and ",
with no avail


From zzvladimir at gmail.com  Wed May 21 03:14:22 2008
From: zzvladimir at gmail.com (Vladimir Kropylev)
Date: Wed, 21 May 2008 11:14:22 +0400
Subject: xpath with big files
Message-ID: <fbe1c7d70805210014l1f628e99rd5953c95e1ba43ed@mail.gmail.com>

Hi,
I've encountered a problem when trying to use lxml.etree.xpath with
big (63Mb) file. It returns empty list on any request.
Is there any restriction on file size for lxml.etree.xpath?

This is what I do:

f=open(filename)
tree = etree.parse(f)
f.close()
r = tree.xpath('//image')
print(r)

it prints:
[]

What is wrong here?


From exarkun at divmod.com  Mon May 12 13:16:29 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 13:16:29 -0400
Subject: Socket and cycle problem
In-Reply-To: <ede112da-da8e-413f-8f03-8e9edb4e6323@d77g2000hsb.googlegroups.com>
Message-ID: <20080512171629.6859.799802490.divmod.quotient.62544@ohm>

On Mon, 12 May 2008 09:19:48 -0700 (PDT), petr.poupa at gmail.com wrote:
>
> [snip]
>>
>> >Where is the mistake? I dont know.
>>
>> You cannot reconnect a socket.  You need to create a new one for each
>> connection.  It's also almost certainly the case that the way you are
>> receiving data is incorrect.  There is no guarantee that you will get
>> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
>> the bytes written to the socket by the peer will be returned by such
>> a call.  Instead, you need a framing protocol to determine when all
>> data has been received.  For example, you might length prefix the
>> data, or you might insert a delimiter (or a terminator) at the end.  Or
>> if there is exactly one message to receive, then you should just read
>> until the recv call returns '', indicating EOF.
>>
>> Jean-Paul
>
>ok thanks, but I am true greenhorn, so you think that the best way is
>write new script?
>Could you send me code if it isnt long, becase I have no idea and
>unfortunately time as well.
>

I'm not sure what you want to happen, so I can't write it for you.  I
suggest you start with Twisted instead of the socket module, though,
as Twisted provides a higher-level interface to network programming.

You can find some introductory documentation about writing clients here:

  http://twistedmatrix.com/projects/core/documentation/howto/clients.html

Jean-Paul


From giles_brown at hotmail.com  Tue May  6 11:44:36 2008
From: giles_brown at hotmail.com (Giles Brown)
Date: Tue, 6 May 2008 08:44:36 -0700 (PDT)
Subject: select.poll() and WSAPoll
References: <mailman.650.1210079955.12834.python-list@python.org>
Message-ID: <ef9a170d-5b87-4ec0-9d7d-67b8d1057083@t54g2000hsg.googlegroups.com>

On 6 May, 14:18, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 6 May 2008 08:36:28 -0400, inhahe <inh... at gmail.com> wrote:
> >select.poll isn't supported on Windows, because Windows doesn't have such a
> >feature, or at least it didn't until Vista.  Vista implements the same thing
> >but called  WSAPoll, an article is here
> >http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
> >I hope that the next edition of Python supports select.poll on Vista, or at
> >least that someone writes a third-party module fo it. As much as I'd love to
> >do it myself, it's probably beyond me.. i've never used poll before nor
> >written a Python extension.  also, i don't have Vista.
> >Thanks
>
> If you use Twisted, then you can use I/O Completion Ports, which are even
> better than WSAPoll, and your code will also work with KQueue on BSD or
> EPoll on Linux without any changes. :)
>
> Jean-Paul

The current docs describe the I/O Completion Ports reactor as
"extremely experimental".

http://twistedmatrix.com/projects/core/documentation/howto/choosing-reactor.html#auto8

Is that overly conservative or is it as bleeding edge as it sounds?

(IIRC there have been caveats like this on the Windows reactors for
a while)

Giles


From zerge69 at gmail.com  Sun May 25 20:21:14 2008
From: zerge69 at gmail.com (Zerge)
Date: Sun, 25 May 2008 17:21:14 -0700 (PDT)
Subject: Pinging a machine from python
References: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>
Message-ID: <0abad6b7-87bc-42d2-88ee-1f2ed40aa07f@w1g2000prd.googlegroups.com>

On May 25, 11:13 am, Prasanth <prasanth... at gmail.com> wrote:
> I tried pinging a machine from python using socket programming but
> could not do it. Is there any module which we can use to ping the
> machine < like net::ping in perl> or can you give me simple program.

Import OS
ip=192.168.1.1
pingtext="ping "+ip+" -n 1"
pingresult=os.popen(pingtext).readlines()

"OS" gives you access to the command line of the operating system.


From nick at craig-wood.com  Fri May 23 16:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 15:30:09 -0500
Subject: Advice from senior Members
References: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>
Message-ID: <slrng3e789.dgr.nick@irishsea.home.craig-wood.com>

flit <superflit at gmail.com> wrote:
>  I am looking for some experience from the senior members.
>  Now I am doing a simple desktop application, this application will
>  have 3 main functions:
> 
>  1- Read information about the desktop system;
>  2- Interact with the user;
>  3- Send information to a server.
> 
>  The first part, reading information about the desktop system, is
>  already done.  And now I am starting to make the gui for the user,
>  that is when the question appear: "What is the best way to make it?
>  divide in files? by classes or functions?"  I have now one big file
>  with all functions to get the desktop information.  Should I make
>  one file for the visual functions (wxpython)? another for the
>  server?  Is productive to divide in files? what is the best way?

I would divide it into 3 files, one for the desktop info, one for the
server interaction and one for the GUI.  Subdivide the files if they
start getting unmanageably long

My wx programs tend to be full of lots of little classes.  I make
every object (pane, window, widget etc) its own class and glue them
all together in other classes.

I'd make your read the information file into probably a single class,
with each function a method.  You can then either read all the
information on __init__ or as methods whichever seems best to you.
Your gui classes will then query this as appropriate (this is the MVC
as discussed by another poster).

You can write another text mode interface for the desktop info module
which prints things out in text format for testing.

Once you've divided your program up, you can start thinking about unit
tests.  You can certainly unit test your desktop info gathering, and
your server interaction.  It is hard to write tests for wx GUIs though
(but not impossible).

When you've finished you'll have 3 files full of classes.  You may
have a few utility functions too.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From ian at excess.org  Mon May 19 09:50:49 2008
From: ian at excess.org (Ian Ward)
Date: Mon, 19 May 2008 09:50:49 -0400
Subject: ANN: Urwid 0.9.8.2 - Console UI Library
Message-ID: <483185B9.9030307@excess.org>

Announcing Urwid 0.9.8.2
------------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.8.2.tar.gz

RSS:
   http://excess.org/feeds/tag/urwid/


About this release:
===================

This is a maintenance release that fixes a number of bugs that have been
found in 0.9.8.1.


New in this release:
====================

  * Fixed incompatibilities with Python 2.3

  * Fixed Pile cursor pref_col bug, WidgetWrap rows caching bug, Button
    mouse_event with no callback bug, Filler body bug triggered by the
    tutorial and a LineBox lline parameter typo.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.








From arnodel at googlemail.com  Wed May  7 14:27:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:27:29 +0100
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <m2fxsu55ri.fsf@googlemail.com>

umpsumps at gmail.com writes:

> Hello,
>
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..
>
> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res
>
> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1
> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]
>
> thanks much!!

I won't comment on the algorithm, but I think you should try to find
better names for your variables.  In the snippet above you have x,
res, dic, newd, length, getvals which don't give much of a clue as to
what they are used for.

e.g.

* dic = {}
We know it's a dict, but a dict of what?

* newd = dic.items()
Sounds like 'new dictionary', but obviously isn'tas it is a list 
of key,value pairs.

* length = len(getvals)
Again, we know it's a length, but the length of what?

HTH

-- 
Arnaud


From castironpi at gmail.com  Tue May 13 09:55:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:55:41 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
	<3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>
Message-ID: <529f1c1f-9ab6-41a4-88f8-7f54d8528f00@d1g2000hsg.googlegroups.com>

On May 13, 8:23?am, gsal <salger... at gmail.com> wrote:
> hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
> the packages I was using because they were in the "egg" form. ?I was
> hoping Installer could...then again, I don't know how long ago
> Installer was written and whether eggs came along after that...
>
> Regarding the word 'copy'...will you please enlighten me? were you
> serious? is it really banned (around here)? I mean, I thought we were
> talking about an open application which, for as long as you pass along
> the (GNU,GPL) license, you are allowed to provide it to other people.
>
> So, then, allow me to ask the real question: ?how do I go about
> deploying a Python application to somebody who has nothing (python nor
> related modules) where my application uses modules from Lib/site-
> packages that are in "egg" form?
>
> Regards,
>
> gsal

Funny you should ask that way; this is strictly speaking, real aside.

If people like to share, but don't know what enough is, (or when,)
real world problems can sometimes arise.  And it's not as easy as
asking an authority to see for yourself.  There are all kinds of power
structures and big sleeping men lying about.  They're big and
sleeping, just men.

Plagiarism (sp.) is a form of copying-- my professors have always
resented and penalized quoting right from the book.  I continue, if
the book's wording is the best way to say certain things (which would
be so popular as to be indistinguishable from analytic/necessary, i.e.
math), the study is rote, and the creation lies about.  But is math in
creation?  I might hold so.  One test even emphasizes, "in your own
words."

But the power structures are men, and men are living; what does life
want?  What will man try to do in and over time?  What are the
universe's poles/attractors/pulls?  What has he done before?  Is there
any money in any logical, cross-sectional isolation of them?  As it's
my belief that man can have too much money, what if you succeed in
trying to make it in the foregoing way?



From mmanns at gmx.net  Tue May 13 14:31:45 2008
From: mmanns at gmx.net (Martin Manns)
Date: Tue, 13 May 2008 20:31:45 +0200
Subject: ANN: pyspread 0.0.6
References: <mailman.1032.1210668518.12834.python-announce-list@python.org>
Message-ID: <mailman.1069.1210705174.12834.python-announce-list@python.org>

On Tue, 13 May 2008 00:23:12 +0200
Martin Manns <mmanns at gmx.net> wrote:

pyspread 0.0.5 has been released.
It is a bugfix release for Mac and Windows.

> --
> 
> About: 
> pyspread is a spreadsheet that accepts a pure python expression in
> each cell.
> 
> --
> 
> Highlights:
> + No non-python syntax add-ons
> + Access to python modules from cells
> + 3D grid
> + Numpy object array for representation of string entry into grid cell
> + Numpy object array for representation of eval function array
> + Cell access via slicing of numpy function array
> + X, Y, and Z yield current cell location for relative reference
> 
> Requires: Python >=2.4, Numpy 1.0.4, and wxPython 2.8.7.1.
> License: GPL
> 
> Project page: http://pyspread.sourceforge.net
 
Best Regards

Martin





From larzluv at hotmail.com  Mon May 12 00:42:55 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 21:42:55 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
Message-ID: <d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>

THANKS, AGAIN, for the reply!  :)

Okay, now I -really- feel silly...  :>

So, when I was going to try what you'd suggested, I noticed something
peculiar: I hadn't "changed" anything on my system, but now, when I
tried to "import magic" I got a missing DLL error.  For a DIFFERENT
DLL!  This got me to thinking...

Turns out, when I was having "success" earlier, I was -in- the C:
\Program Files\GnuWin32\bin directory (where file.exe and related .dll
files are).

So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
PATH.  Everything worked.  I removed all the copious copies of the
DLL, the magic files, etc., littering my hard drive in every other
location.  Still worked.

'Course, I don't honestly know why it didn't work with the files
copied to other locales contained in the sys/Py paths... perhaps it
was, as you mentioned, wanting the tree-structure to be the same?  (I
haven't the heart to check this out fully right now... *maybe* at a
later time...  ;) )

Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
THAT... you know, all the "obvious"/"I've been programming/working in
computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
'hacker'..." stuff.  I -swear-!

[EGG ON FACE]

[SIGH]  Well, I'd say "live and learn", but I'm still scratching my
head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
off to work _with_ the module now, then work-up my HowTo (and
experiment with making an "egg"?? ;) )...


Caio!
-Larry  :P  :)



On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
> Larry Hale wrote:
> > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > file... still no-go.  :/
>
> It's often the custom of programs ported from unix to windows to use the
> dll location as a key to find the other files that are typically in
> share, or etc.  GTK, for example uses ../share and ../etc from the
> location where the dlls are stored (if the dlls are in a folder called bin).
>
> In this case I'd try making a folder in the Python25 folder called
> "share" and put the contents of the gnuwin32 share/file stuff in there.
>  Should look something like this:
>
> c:/python25/share/file/magic.mime.mgc
> c:/python25/share/file/magic
> c:/python25/share/file/magic.mgc
> c:/python25/share/file/magic.mime
>
> Or, judging by a string I found in the dll itself, you might have to put
> the files here:
>
> c:/progra~1/File/share/file/magic
>
> Although if such a path really is hardcoded into the dll, this is
> certainly a bug, since it will fail on certain non-english windows systems.
>
> Anyway, who knows.  Give these options a try.



From prabaindra at gmail.com  Thu May  1 09:11:47 2008
From: prabaindra at gmail.com (prabaindra at gmail.com)
Date: Thu, 1 May 2008 06:11:47 -0700 (PDT)
Subject: DO U WANT TO KNOW ABOUT SCIENTOLOGY?
Message-ID: <7fe132fe-8a8a-4abc-9d8e-f1c27d00cc48@z24g2000prf.googlegroups.com>


                    HELLO FRIEND IAM SHALINI,

                                        DO U WANT TO KNOW ABOUT
SCIENTOLOGY?

                                             PLS LOOK AT THE BELOW
WEBSITE.

                                                 www.bigconcern3.blogspot.com


From torriem at gmail.com  Mon May 12 08:48:12 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 12 May 2008 06:48:12 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <4827C2E7.2040703@gmail.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>
	<4827C2E7.2040703@gmail.com>
Message-ID: <48283C8C.9040804@gmail.com>

Michael Torrie wrote:
> In this case I'd try making a folder in the Python25 folder called
> "share" and put the contents of the gnuwin32 share/file stuff in there.
>  Should look something like this:
> 
> c:/python25/share/file/magic.mime.mgc
> c:/python25/share/file/magic
> c:/python25/share/file/magic.mgc
> c:/python25/share/file/magic.mime

I used linux's strace command to trace the file calls of file.exe via
wine (fun!) and verified that magic1.dll indeed will first in
c:/progra~1/File/share/file/magic and then in ../share/file


From ivo.talvet at gmail.com  Mon May 12 07:07:04 2008
From: ivo.talvet at gmail.com (ivo talvet)
Date: Mon, 12 May 2008 13:07:04 +0200
Subject: python without while and other "explosive" statements
In-Reply-To: <4827A364.9040507@mattnordhoff.com>
References: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
	<4827A364.9040507@mattnordhoff.com>
Message-ID: <3dd0b1a30805120407w407c9bbdr6439f4a89bc4df84@mail.gmail.com>

thanks for the tips, pam limits and http://codepad.org/ are both
interesting tracks.

Ivo

2008/5/12 Matt Nordhoff <mnordhoff at mattnordhoff.com>:
>
> ivo talvet wrote:
>  > Hello,
>  >
>  > Is it possible to have a python which not handle the execution of
>  > "while", "for", and other loop statements ? I would like to allow
>  > remote execution of python on a public irc channel, so i'm looking for
>  > techniques which would do so people won't be able to crash my computer
>  > (while 1: os.fork(1)), or at least won't won't freeze my python in a
>  > infinite loop, make it unresponsive. Is there a compiling option (or
>  > better, something i can get with apt-get cos i think compiling myself
>  > and handle all the metastuff myself is somehow dirty) for have a
>  > "secure python" (you can guess what i mean by "secure" in my case) or
>  > must i touch myself the source disable some code lines ? If last
>  > solution, which modifications in which files should i do ? (sorry for
>  > my bad english)
>  >
>  > Thanks.
>  >
>  > Ivo
>
>  <http://codepad.org/> is a pastebin-like website that lets people upload
>  code in a dozen different languages, and it runs it. They have info up
>  about how it's secure at <http://codepad.org/about>.
>
>  I'm pretty sure there's another similar website that's specific to
>  Python, but I can't remember it. Anyway, it was similar, using virtual
>  machines, a firewall, and killing stuff that ran for longer than 20
>  seconds, IIRC.
>
>  (Thanks for the link to codepad, habnabit.)
>  --
>


From gneuner2/ at /comcast.net  Thu May  8 21:32:58 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Thu, 08 May 2008 21:32:58 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <l097249qdplrlq17jctfthbooqdlgol85e@4ax.com>

On Thu, 08 May 2008 03:25:54 -0700,
usenet1.3.CalRobert at SpamGourmet.Com (Robert Maas,
http://tinyurl.com/uh3t) wrote:

>> From: "xah... at gmail.com" <xah... at gmail.com>
>> the importance of naming of functions.
>
>> ... [take] a keyword and ask a wide
>> audience, who doesn't know about the language or even unfamiliar of
>> computer programing, to guess what it means.

This is a dumb idea ...

>Better would be to reverse the question: Ask
>random people on the street what they would like to call these
>concepts:

... and this one is even dumber.

Terms don't exist in a vacuum - they exist to facilitate communication
within a particular knowledge or skill domain.  For example, English
is only meaningful to those who speak English.  The opinions of random
people who have no relevant domain knowledge are worthless.

Such a survey could only be meaningful if the survey population
already possessed some knowledge of programming, but were not already
aware of the particular terminology being surveyed.

George
--
for email reply remove "/" from address


From boblatest at googlemail.com  Wed May 21 09:12:13 2008
From: boblatest at googlemail.com (boblatest at googlemail.com)
Date: Wed, 21 May 2008 06:12:13 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
Message-ID: <7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>

On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:

> Although that solution is pretty, it is not the canonical solution
> because it doesn't cover the important case of "if" bodies needing to
> access common variables in the enclosing scope.  (This will be easier
> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
> IMHO closer to a canonical solution to this FAQ.

Hello everybody,

thanks for the various answers. I'm actually pretty puzzled because I
expected to see some obvious solution that I just hadn't found before.
In general I find Python more elegant and syntactically richer than C
(that's where I come from), so I didn't expect the solutions to be a
lot more verbose and/or ugly (no offense) than the original idea which
would have worked if Python's assignment statement would double as
expression, as in C.

Thanks again,
robert

PS: Since I'm testing only three REs, and I only need the match
results from one of them, I just re-evaluate that one.


From pavlovevidence at gmail.com  Mon May 12 14:23:07 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 12 May 2008 11:23:07 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
Message-ID: <efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>

On May 12, 3:42 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Because of the precedent of those names, choosing one of those names
> doesn't make it clear to the reader that the value is never used;


Why is it even necessary to document this?  This is the thing that
baffles me the most about this thread.

Think about all the various aspect of a varibale:

* is it some common usage archetype
* value it represents
* scope
* (expected) type
* physical units of measure
* software package it belongs to
* whether it's used in the program or not
* scalar, structure, or array
* mutable or constant
* and so on

You cannot possibly document all of this pertinent information in the
name alone.  A variable's name is a very limited resource: one can
only document a tiny number of things, so one must prioritize.

IMHO, whether a varibale is used or not has got to be one of the least
important things of all (in no small part because it's easily
discernable from nearby code).  In fact, I'd say it's so irrelevant I
probably wouldn't have listed it if it wasn't the topic of discussion.

The first two items I listed are the most important to me.  If a
variable fills the archetypal role of counter, then it ought to be
named like a counter; this usually trumps all other concerns.  (Never
mind that the varibale here isn't really a counter, it still fills the
archetypal role of one, which is more important.  The name of a
variable is for the reader's benefit.)  So I would have to agree with
Ivan Illarionov.

Having said that, if you do think it's most important to document
whether something is used, I would suggest not using "_" (because it's
conflicts with gettext conventions) or "dummy" (because it's
misleading) for it.


Carl Banks


From gherron at islandtraining.com  Sun May 11 13:51:34 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 10:51:34 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <WLFVj.32499$KJ1.2751@newsfe19.lga>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <48273226.8060405@islandtraining.com>

bc90021 wrote:
> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>   

I don't believe you.  I think you have something like

    g = open('fileName', 'a')

instead of (as you claim)

    g = open(fileName, 'a')

Do you see the difference?  

Develop the skill of reading the error messages *very* carefully.  Your error says there is no file named "fileName", and if you think about what's on your disk, I'll bet you won't find a file whose name is "fileName".


Gary Herron



> where fileName is defined before the line it's used in.  It works fine 
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get 
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>
> Are threads not allowed to create files?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From wizzardx at gmail.com  Sun May  4 09:18:50 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 15:18:50 +0200
Subject: please remove me from this list
In-Reply-To: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>
References: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>
Message-ID: <18c1e6480805040618p14c27164r362584d0ad5f2259@mail.gmail.com>

On Sun, May 4, 2008 at 2:48 PM, Vladimir Kropylev <zzvladimir at gmail.com> wrote:
> please remove me from this list, thanks
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>

Follow that link (http://mail.python.org/mailman/listinfo/python-list)
and see the "Python-list Subscribers" section.

David.


From matthieu.brucher at gmail.com  Wed May 21 08:32:47 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Wed, 21 May 2008 14:32:47 +0200
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <e76aa17f0805210532mb2accd3p63bfaa01cf937a3f@mail.gmail.com>

>
> This is all true if you want to operate in "native" mode; however in
> "standard" mode the sizes are fixed -- otherwise there'd be no easy way of
> reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required for
> any type (so you have to use pad bytes); short is 2 bytes; int and long are
> 4 bytes; long long (__int64 on Windows) is 8 bytes; float and double are
> 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a
> long-established PC file format, he will need to '<' for littleendian order,
> and an appropriate selection from bBhHiI and d will do what he needs.
>
> HTH,
> John


On an Ubuntu 64 box :

>>> struct.calcsize('l')
8

not 4.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From pecora at anvil.nrl.navy.mil  Fri May  9 11:23:42 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 May 2008 11:23:42 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
Message-ID: <pecora-DFE713.11234209052008@ra.nrl.navy.mil>

In article <mailman.825.1210293599.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Luis Zarrabeitia" <kyrie at uh.cu> wrote in message 
> news:200805081914.06459.kyrie at uh.cu...
> | Btw, there seems to be a math problem in python with exponentiation...
> | >>> 0**0
> | 1
> | That 0^0 should be a nan or exception, I guess, but not 1.
> 
> a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
> But there are unenlighted people who agree with you ;-)
> Wikipedia has a discussion of this.
> 
> tjr

I like that argument better.  But...

I've also heard the very similar a**b is a multiplied by a b-1 times.  
That gives 0**0=0*(1/0).  Uh, Oh!  If you want consistency with the 
treatment of exponents that might cause problems.  Tough situation when 
you have a "discontinuity" at 0 for x^x.

-- 
-- Lou Pecora


From castironpi at gmail.com  Wed May 14 14:06:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:06:31 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com>
Message-ID: <0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>

On May 14, 1:02?pm, castiro... at gmail.com wrote:
> On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > you can safely ignore its posts.
>
> > > > > > How does it generate text?
>
> > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > However you know what would be helpful? ?If I could go to the right
> > > > place to start the ring.
>
> > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > I'd stay on mutability for the world domination factor. ?Fluent
> > currency is buoyant currency; turn on a local clock, and someone gets
> > some cubic verticals.
>
> > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > can pretty well win work.- Hide quoted text -
>
> > - Show quoted text -
>
> I have a self-referential on Pygame: it's a Hand Tool object.
> Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> - Show quoted text -

If Python can plot in to chess, and Tron rings live, then why not
group it knew?


From collinyeung at shaw.ca  Mon May 12 00:54:28 2008
From: collinyeung at shaw.ca (Collin)
Date: Mon, 12 May 2008 04:54:28 GMT
Subject: Accepting text input
In-Reply-To: <72QVj.262833$pM4.115744@pd7urf1no>
References: <72QVj.262833$pM4.115744@pd7urf1no>
Message-ID: <84QVj.133083$rd2.94188@pd7urf3no>

Collin wrote:
> I'm pretty new to Python, but this has really bugged me. I can't find a 
> way around it.
> 
> 
> The problem is that, when I use raw_input("sajfasjdf") whatever, or 
> input("dsjfadsjfa"), you can only have numerical values as answers.
> 
> Any help would be appreciated. Thanks.


Oh, wow. I feel so stupid. Please disregard this message. <_<

I read the error message just now a bit more carefully, and I tried 
something. I tried defining "yes" as some random numerical value. Then 
when I did:
(example code)

yes = 123123983 #some number
test = input("Test test test ")
if test == yes:
	print "It worked."
else:
	print "failed"

(example code off)

Collin


From banibrata.dutta at gmail.com  Tue May  6 10:21:15 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 19:51:15 +0530
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
Message-ID: <3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>

Many not be the most intuitive and elegant solution (I'm just a Python
newbie), but if your Python code is constrained to the usage of Python 2.2
language features, you could use Jython, and then (I'm hoping, since I've
not tried this myself), use the Java Memory usage profiling/debugging tools.

Would be really interested to know the answer to the question, i.e. if there
are any CPython solutions.

On Tue, May 6, 2008 at 6:57 PM, David <wizzardx at gmail.com> wrote:

> Hi list.
>
> I've tried Googling for this and I checked the Python docs, but to no
> avail.
>
> What is the best way to debug memory usage in a Python script?
>
> I'd like to see what objects are using the most memory. Ideally this
> would be aware of references too. So if I have a small list that
> contains (references rather) some large variables, then I could see
> that the global list variable was responsible for X MB that couldn't
> be collected by the garbage collector.
>
> It would be nice if it could be used in a similar way to the 'du'
> Linux command. eg:
>
> eg output:
>
> >>> mem_debugger.pretty_print()
> A (type: list): 8 bytes, 10MB
>  - a (type: string): 6 MB, 0 bytes
>  - b (type: string): 4 MB, 0 bytes
> B (type: dict): 8 bytes, 5 MB
>  - d (type: string): 3 MB, 0 bytes
>  - c (type: string): 2 MB, 0 bytes
>
> In the output above, the 1st size is the memory used by the object
> itself, and the 2nd size is the memory used by objects it refers to. A
> & B are global vars (a string and a dict), a,b,c, and d are strings
> that were added to A & B at some point in the past, and aren't refered
> to by anything else. Also, the output is in descending order of size.
>
> Are there any tools/modules/etc I can use like this?
>
> David.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From ivan.illarionov at gmail.com  Sat May  3 17:37:25 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 21:37:25 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <fvilul$15ti$1@news.mtu.ru>

On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:

> Arnaud Delobelle wrote:
>> 
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
> 
> This occurred to me also, but then I tried
> 
> sum(['abc', 'efg'], '')

Interesting, I always thought that sum is like shortcut of
reduce(operator.add, ...), but I was mistaken.

reduce() is more forgiving:
reduce(operator.add, ['abc', 'efg'], '' ) # it works
'abcefg'

-- 
Ivan


From castironpi at gmail.com  Fri May 16 10:41:34 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:41:34 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
	<c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>
	<e3b69913-b730-4657-a014-084b7a018881@b1g2000hsg.googlegroups.com>
Message-ID: <9dec1377-270f-46d6-bac8-f003e32f9bec@m36g2000hse.googlegroups.com>

On May 16, 8:56 am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:51 am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
>
> > > ?? wrote:
> > > >     I wonder why below does not work.
>
> > > > a = object()
> > > > a.b = 1        # dynamic bind attribute failed...
>
> > > The implementation of slots depends on that behaviour:
>
> > >http://docs.python.org/ref/slots.html
>
> > > > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> > > Can you expand on that?
>
> > > Peter
>
> > Spirals are important.
>
> I'd be modeling streams, in par. crossing them.- Hide quoted text -
>
> - Show quoted text -

Python 3.0a5 (py3k:62932M, May  9 2008
 win32
Type "help", "copyright", "credits" or
>>> import parser
>>> import compiler
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named compiler

Does anyone want to model mic-based soundwaves?  My recent project has
been color progression over time, and talking about compilers.


From timr at probo.com  Thu May  8 03:09:02 2008
From: timr at probo.com (Tim Roberts)
Date: Thu, 08 May 2008 07:09:02 GMT
Subject: strftime() argument 1 must be str, not unicode
References: <48215537.100@promsoft.ru>
	<mailman.695.1210147319.12834.python-list@python.org>
Message-ID: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>

"Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:

>2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
>> Subj is bag?
>>
>>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
>> (Intel)] on win32
>>  Type "help", "copyright", "credits" or "license" for more information.
>>  >>> from datetime import datetime
>>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>>  '2008_05_07 12_30_22.csv'
>>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>>  Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>  TypeError: strftime() argument 1 must be str, not unicode
>
>Unicode and str objects are not the same. Why do you think that this
>is a bug?

I think that's a perfectly reasonable thing to expect.  At the risk of
over-generalization, there is no good reason why, by this point in time,
all of the standard library routines that accept strings shouldn't also
accept Unicode strings.

It's the duck typing principle.  Unicode strings look, walk, and talk like
regular strings.  An error like this is not intuitive.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From python at rcn.com  Mon May 19 19:11:10 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 19 May 2008 16:11:10 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <50f0dc9e-6c5a-4862-b23c-14be473c531d@d19g2000prm.googlegroups.com>

On May 16, 9:01?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.

Sounds like a serious case of mis-learning.

Class methods are the preferred way to implement alternate
constructors.  For good examples, see dict.fromkeys() or any of the
various datetime constructors.

Raymond


From gizmohackers at gmail.com  Thu May  1 19:43:56 2008
From: gizmohackers at gmail.com (gizmohackers at gmail.com)
Date: Thu, 1 May 2008 16:43:56 -0700 (PDT)
Subject: Up to the minute gizmo and gadget news and reviews!
Message-ID: <17ffbd1d-ec9b-4cd8-a515-ca274613fb4e@w5g2000prd.googlegroups.com>

Come check out this new site on the latest news and reviews on gizmos
and gadgets!

http://gizmohacker.com/


From basti.wiesner at gmx.net  Mon May 26 15:26:55 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 21:26:55 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com> <g1f11p$2a08$1@news.mtu.ru>
Message-ID: <g1f2v2$129$01$1@news.t-online.com>

[ Ivan Illarionov <ivan.illarionov at gmail.com> ]

> If the OP wants PHP-style programming he will get better results with PHP
> because PHP was designed this way. Any Pythonic solution will be an
> overkill.

Better shoot yourself in the foot with a PHP-like Python-thing, than
committing suicide by shooting yourself into the head with PHP ...

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From fetchinson at googlemail.com  Wed May 21 22:02:45 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 19:02:45 -0700
Subject: backport of 'set' to python 2.3?
In-Reply-To: <871w3vdrx9.fsf@benfinney.id.au>
References: <mailman.1459.1211420324.12834.python-list@python.org>
	<871w3vdrx9.fsf@benfinney.id.au>
Message-ID: <fbe2e2100805211902l1953eb16tc9697e4c09f2101e@mail.gmail.com>

>> Does anyone have a pure python implementation of the builtin 'set'
>> object so that I could use that in python 2.3?
>
> Yes. You have one in Python 2.3 already
> <URL:http://www.python.org/doc/2.3.5/lib/module-sets.html>, it's just
> not a builtin.
>
>> If this would be the case that would be really great as I wouldn't
>> have to change my code that runs happily on 2.5
>
> You will, but it's as simple as:
>
>     try:
>         set()
>     except NameError:
>         from sets import Set as set
>
> You then know that 'set' refers to the set type from that point on (or
> you're not on a version of Python that has a 'set' type at all).

Thanks Ben! I should have checked the docs........

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From lists at cheimes.de  Thu May 29 06:05:55 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 29 May 2008 12:05:55 +0200
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <g1lv63$i6t$1@ger.gmane.org>

Dark Wind schrieb:
> Hi,
> 
> Is there any command in Python which gives the code for a function like just
> typing the name of a function (say svd) in R returns its code.

Yes, it's posible to retrieve the source code IFF the function is
implemented in Python and the .py file is available, too.

>>> print inspect.getsource(inspect.getsource)
def getsource(object):
    """Return the text of the source code for an object.

    The argument may be a module, class, method, function, traceback, frame,
    or code object.  The source code is returned as a single string.  An
    IOError is raised if the source code cannot be retrieved."""
    lines, lnum = getsourcelines(object)
    return string.join(lines, '')



From deets at nospam.web.de  Tue May 13 12:45:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:45:51 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <68tuv6F2qbm5nU1@mid.uni-berlin.de>

> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Oh, would you please additionally comment on the ease of use of FT in the
domain of string-manipulation, regular expressions, collection datatypes? 

I'm keen to know which 5-10 times faster FT-driven site out there deals with
user-input without these....

Diez


From ian.g.kelly at gmail.com  Fri May  9 02:23:10 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Fri, 9 May 2008 00:23:10 -0600
Subject: slicing lists
In-Reply-To: <rXqUj.120085$rd2.64592@pd7urf3no>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
Message-ID: <3fc761710805082323s3e392b8av2605b9be8240c53f@mail.gmail.com>

On Wed, May 7, 2008 at 5:29 PM, Yves Dorfsman <yves at zioup.com> wrote:
> Is there a way to do:
> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> x[0,2:6]
>
> That would return:
> [0, 3, 4, 5, 6]
>
> I am surprised this notation is not supported, it seems intuitive.
> A concrete example of the sort of thing I want to do:
>
> p = file('/etc/passwd').readlines()
> q = [ e.strip().split(':')[0,2:] for e in p ]
>
> (getting rid of the password / x field)

Have a look at the itemgetter function from the operator module.

g = itemgetter( 0, *range(2, 6) )
p = file("/etc/passwd").readlines()
q = [ g( e.strip().split(':') ) for e in p ]


From george.sakkis at gmail.com  Fri May 23 14:00:42 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 23 May 2008 11:00:42 -0700 (PDT)
Subject: Segmentation fault on updating a BYTEA field [psycopg2]
References: <f3b33874-7f0c-4fb7-a5d3-d3c75927000c@f63g2000hsf.googlegroups.com>
Message-ID: <79a4662f-3402-49e7-a0ed-0d7a3fdb3172@r66g2000hsg.googlegroups.com>

On May 21, 6:32 pm, George Sakkis <george.sak... at gmail.com> wrote:

> I have a simple DB table that stores md5 signature pairs:
>
>    Table "public.duplicate"
>   Column  | Type  | Modifiers
> ----------+-------+-----------
>  sig      | bytea | not null
>  orig_sig | bytea | not null
> Indexes:
>     "duplicate_pkey" PRIMARY KEY, btree (sig)
>     "ix_duplicate_orig_sig" btree (orig_sig)
>
> I use SqlAlchemy to interact with it and inserting works fine; update
> however crashes hard with a segfault. Sure enough, the crash is
> reproducible when using the underlying psycopg2 directly:
>
> >>> import psycopg2
> >>> connect_string = ...
> >>> conn = psycopg2.connect(connect_string)
> >>> cur = conn.cursor()
> >>> cur.execute('SELECT sig,orig_sig from duplicate limit 1')
> >>> d = cur.fetchone()
> >>> d
>
> (<read-only buffer for 0x40209100, size 16, offset 0 at 0x403054e0>,
> <read-only buffer for 0x402090f0, size 16, offset 0 at 0x40305580>)>>> map(str,d)
>
> ["\x02#qO\xb0\xcc\xfcx\xb9u\xa5\x83)\xc4'@", '\xa1\xf22\xf6y\xd0\xbc
> \xea6\xf0Y\xf1"\xc9(\n']>>> cur.execute('UPDATE duplicate SET orig_sig=%(orig_sig)s WHERE duplicate.sig = %(duplicate_sig)s',
>
> ...             dict(orig_sig=d[0], duplicate_sig=d[1]))
> Segmentation fault
>
> Am I (and SqlAlchemy) doing something silly or is this a bug in
> psycopg2 ?
>
> George

I installed the latest release (psycopg2-2.0.7) and it seems the
problem is gone. Sorry for the noise.

George


From cjw at ncf.ca  Sat May 10 18:20:04 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 10 May 2008 18:20:04 -0400
Subject: test
Message-ID: <48261F94.6060608@ncf.ca>

test


From notnorwegian at yahoo.se  Wed May 21 15:19:16 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Wed, 21 May 2008 12:19:16 -0700 (PDT)
Subject: Psyche (scheme in python), how to run on vista?
Message-ID: <01afbef9-6225-487d-9468-cbdf9b03c64b@b1g2000hsg.googlegroups.com>

anyone using psyche?

how do you run it on Vista? what file do you click? there is no
obvious file like psyche.py...


From pistacchio at gmail.com  Thu May  8 09:49:01 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 15:49:01 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de>
Message-ID: <fvv0cg$rsh$1@aioe.org>

Marc 'BlackJack' Rintsch ha scritto:
> On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:
> 
>> Are you a newbie to Python, or to programming in general? I'll assume
>> you are a newbie to programming in general because of that last
>> question you asked. Things in Python are easier than in almost any
>> other programming language. Here are three Hello World programs:
> 
> Counterexamples for quite short "greetings" in other programming languages:
> 
> (Free)BASIC::
> 
>   Print "Hello World!"

freebasic is another language i'd point out to a newbie, even if it is 
not as multiplatform as python if. it has a decent community and a large 
amount of libraries. it doesn't let you explore functional or, worse, 
object oriented programming nor you can write server side programs with it.
The others are examples of easy "hello world" languages, but, passed 
that, i think they don't have the same capabilities of python on terms 
of support, kind of programs you can write and even overall complexity 
(haskell forces you to functional programming, io is really a minor 
language, ocalm forces you to di OOP and, if writing hello world is 
simple, on the other hand ir may have lines of code that read like:

| [] -> []

and that negatively compesate the easy way you can write "hello world"

> OCaml::
> 
>   print_string "Hello World!" ;;
>
> Io::
> 
>   "Hello World!" linePrint
> 
> Haskell::
> 
>   main = putStrLn "Hello World!"
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch


From holdenpage at gmail.com  Fri May  9 11:39:29 2008
From: holdenpage at gmail.com (Holden)
Date: Fri, 9 May 2008 08:39:29 -0700 (PDT)
Subject: A question about python and xml
Message-ID: <0507ffd8-6842-4546-a635-414fabf481fb@y21g2000hsf.googlegroups.com>

Hello everyone I heard this was a good community to go too for help
and advice. I want to make a web site that uses the python programming
language which I am VERY new at. This website would store simple data
such as names in a form. At first I wanted to use mysql to store the
data but I want to export the data using xml.

So say if a user logged in they would be able to store there basic
information in an xml file and download it whenever. Is that possible
using XML and Python. I am sorry if this post doesn't make much sense
but any advice would be greatly appreciated. You can also e-mail me if
you need further information or clarification.

Thanks

Holden


From meesters at uni-mainz.de  Thu May 29 10:11:46 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Thu, 29 May 2008 16:11:46 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
	<6a7qarF35bvivU1@mid.uni-berlin.de>
Message-ID: <g1mdj3$kbb$1@news1.zdv.uni-mainz.de>

> What happens if you get rid of the ()?
Can't see any difference.




From ptmcg at austin.rr.com  Mon May 19 09:40:31 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:40:31 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com> 
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
Message-ID: <081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>

On May 18, 10:41?am, "inhahe" <inh... at gmail.com> wrote:
> > Both the responses offer lambda free alternatives. That's fine, and
> > given the terse documentation and problems that I had understanding
> > them, I would agree. So what applications are lambdas suited to? I
> > think the parameterised function model is one.
> > What else?
>
> i've hardly ever used lambdas since map() and filter() were replaced by list
> comprehension. ?two other uses I can think of for it are: using it as a
> sorting key (which takes a function and lambdas are perfect for that when a
> direct function isn't available. for example, lambda x: x.myName), and I
> made an irc bot once that certain events had a list of fuctions that would
> be called after that event. ?it was like being able to dynamically add and
> remove event handlers. ?for example what if you asked the user a question
> and you wanted to know for the next input whether it was from that user and
> was an answer to that question. ?sometimes the function to add would be very
> simple, so writing a def for it would just be ugly.

lambda is handy in defining parse actions in pyparsing.  Parse actions
are callbacks to be run when an expression within a larger grammar is
matched.  A common use for parse actions is to do some sort of text or
type conversion.  The simplest parse actions are called using the list
of matched tokens.  Here is a subexpression that will convert numeric
strings found in a larger grammar to ints:

integer = Word("0123456789").setParseAction(lambda tokens:
int(tokens[0]) )

Since this returns an actual int, there is no need to junk up the post-
parsing code with calls to int(), float(), etc. for these simple
conversions.

Here is an example parse action that just converts a set of matched
words to title case:

title = OneOrMore(Word(alphas)).setParseAction(lambda tokens: "
".join([ t.title() for t in tokens ]) )
print title.parseString("the sun also rises")[0]

prints:
The Sun Also Rises

This second example is about as complex as I'd like to get in a
lambda, though.  Anything more elaborate than that, and I'd go with a
separately defined function.

-- Paul




From _karlo_ at _mosor.net_  Thu May 22 04:15:52 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Thu, 22 May 2008 08:15:52 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <Xns9AA6686AEABB8mosornet@161.53.160.65>

alex23 <wuwei23 at gmail.com> wrote in
news:485f7ddc-8f50-4483-b591-151f1ae560be at k10g2000prm.googlegroups.com: 

> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?

Because when you expect exception to occur on something like 0.01% of 
cases, and you have 4 or 5 exceptions and the code to test for each 
conditions that cause exceptions is quite long and burried deep inside 
some other code it's much better to do it this way ;). Too bad there's no 
syntactic sugar for doing this kind of try-except loop.


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From zxo102 at gmail.com  Sat May 24 19:05:42 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 16:05:42 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in 
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
	<e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
Message-ID: <7890f3bd-0d66-4bdd-871e-516344a39f3d@i36g2000prf.googlegroups.com>

On 5?25?, ??6?59?, zxo102 <zxo... at gmail.com> wrote:
> But this is not "\xED\x6F\x3C\x01".  I need it for
> struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
> (IEEE 754).
> Any other suggestions?
>
> ouyang
>
> On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
>
>
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
>
> > [ zxo102 <zxo... at gmail.com> ]
>
> > >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > > "\xED\x6F\x3C\x01" in python coding?
> > > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > > the error information : invalid \x escape.
>
> > [1]--> 'ED6F3C01'.decode('hex')
> > Out[1]: '\xedo<\x01'
>
> > - --
> > Freedom is always the freedom of dissenters.
> >                                       (Rosa Luxemburg)
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v2.0.9 (GNU/Linux)
>
> > iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> > YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> > =jxll
> > -----END PGP SIGNATURE------ ??????? -
>
> - ??????? -

Hash: SHA1
I got it. Just simply use it like
struct.unpack('f',"ED6F3C01".decode('hex')). It works now.

Thank you very much.
ouyang


From varshinirs at gmail.com  Sun May 11 21:05:54 2008
From: varshinirs at gmail.com (surana)
Date: Sun, 11 May 2008 18:05:54 -0700 (PDT)
Subject: A site for all your programming language needs
Message-ID: <40f72ace-ede1-4b92-a9af-e77cf511d9cf@p25g2000pri.googlegroups.com>

A complete tutorial for all your programming language needs such as
Java, .Net and many more. A one shop site for all your programming
language needs and find details on latest updates on sqlserver 2008

http://www.computenetwork.blogspot.com
http://www.sqlserversoftware.blogspot.com


From krustymonkey at gmail.com  Thu May  8 00:02:48 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Wed, 7 May 2008 21:02:48 -0700 (PDT)
Subject: pickle problem
Message-ID: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>

I'm wondering if anyone can help with a workaround for a problem I
currently have.  I'm trying to set up a prefork tcp server.
Specifically, I'm setting up a server that forks children and has them
listen on pipes created with os.pipe().  The parent process for the
group starts an inet:tcp server on a given port.  In the parent, after
a "socket.accept()", I'm trying to pickle the connection object to
send over an IPC pipe (as stated previously), but I get the following
error:

File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
    raise TypeError("a class that defines __slots__ without "
TypeError: a class that defines __slots__ without defining
__getstate__ cannot be pickled

Does anyone know of a workaround for this?  Maybe my approach to this
is wrong?  Any help would be appreciated.

Jay


From yves at zioup.com  Sun May 11 22:28:13 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 02:28:13 GMT
Subject: anonymous assignment
Message-ID: <1XNVj.133805$Cj7.33096@pd7urf2no>

Is there anyway to tell python I don't care about a value ?

Say I want today's year and day, I'd like to do something like:

import time
y, None, d, None, None, None, None = time.localtime()

I know you can't assign anything to None, but I'm sure you get what I mean, 
a special keyword that means I don't care about this value. In this 
particular case, there's got to be a better way than:

d = time.local()
y = d[0]
d = d[1]



Thanks.


Yves.
http://www.SollerS.ca


From berlin.brown at gmail.com  Tue May  6 10:40:10 2008
From: berlin.brown at gmail.com (Berlin Brown)
Date: Tue, 6 May 2008 07:40:10 -0700 (PDT)
Subject: Cygwin and path issues
Message-ID: <941c7834-3120-471f-aae9-d6dd7b412b82@a1g2000hsb.googlegroups.com>

I am trying to run some basic unit tests, but I can't get the paths
setup in python/cygwin to pick up my modules.

This code works fine in linux and I installed python through cygwin
not as part of the win32 install.


DIR_PATH =
os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
PROJECT_HOME = os.path.join(DIR_PATH, '..', '..', '..')

print("INFO: project_home=%s" % PROJECT_HOME)

EXTRA_PATHS = [
  DIR_PATH,
  os.path.join(PROJECT_HOME, 'projects', 'ghostnet'),
  os.path.join(PROJECT_HOME, 'google_appengine'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'webob'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'yaml', 'lib')
]
sys.path = EXTRA_PATHS + sys.path

print sys.path

---------------

in my ~/.bash_profile

I also included the following.

export PYTHONPATH=/cygdrive/c/projects/projects_ecl/botlist:/cygdrive/
c/projects


Basically, I tried to add the module directory locations in my code;
also I tried to add the absolute path to my PYTHONPATH.

None of these approaches work.  I get the following error, which I
dont get on the linux side:

Traceback (most recent call last):
  File "run_all_tests.py", line 108, in <module>
    from django.conf import settings
ImportError: No module named django.conf


From kyosohma at gmail.com  Wed May  7 09:07:25 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 06:07:25 -0700 (PDT)
Subject: loading folder list from my mailbox in python
References: <mailman.689.1210142506.12834.python-list@python.org>
Message-ID: <ddfa7b3b-0268-4390-a69c-3cdf7501bb48@j22g2000hsf.googlegroups.com>

On May 7, 1:15?am, ris... at students.iiit.ac.in wrote:
> Hey everyone,
> I want to print the folder list of my mailbox using python (IMAP4), and
> with hierarchy, i.e. it should print all the names of the folders of my
> mailbox and the folders within them.
> Can anyone please help me with this.

Without knowing the backend, it's mostly a shot in the dark. Oh well.
I did some Google-Fu (which you would be wise to learn) and found the
following:

http://www.devshed.com/c/a/Python/Python-Email-Libraries-part-2-IMAP/
http://www.example-code.com/python/imap.asp
http://pypi.python.org/pypi/imap-utils/0.3
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52299

I think at least one of those will get you started. If you're talking
about communicating with Exchange, then you may have to use some win32
or ctypes methods.

Mike


From wizzardx at gmail.com  Sat May 24 11:51:23 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 17:51:23 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>

> I work in small increments, writing one test at a time, then some code,
> then another test, then some more code, etc.  In fact, I take this to what
> many people might call an extreme.

Thanks for the replies.

I've read about the TDD (and similar) approaches. Maybe I need to try
it and get used to it, but there are a few things I don't like about
it on a gut level. I'll try to enumerate my concerns here.

Problem 1: You can only code against tests

Basically, with TDD you write the tests first, then the code which
passes/fails the tests as appropriate. However, as you're writing the
code you will also think of a lot of corner cases you should also
handle. The natural way to do this is to add them to the code first.
But with TDD you have to first write a test for the corner case, even
if setting up test code for it is very complicated. So, you have these
options:

- Take as much time as needed to put a complicated test case in place.
- Don't add corner case to your code because you can't (don't have
time to) write a test for it.
- Add the corner case handling to the code first, and try to add a
test later if you have time for it.

Problem 2: Slows down prototyping

In order to get a new system working, it's nice to be able to throw
together a set of modules quickly, and if that doesn't work, scrap it
and try something else. There's a rule (forget where) that your first
system will always be a prototype, regardless of intent.

With TDD, you have to first write the tests for the first version.
Then when that first version doesn't work out, you end up scrapping
the tests and the code. The time spent writing the tests was wasted.

Problem 3: Slows down development in general

Having to write tests for all code takes time. Instead of eg: 10 hours
coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
writing all the tests, and 10 on the code.

Problem 4: Can make refactoring difficult.

If you have very complete & detailed tests for your project, but one
day you need to change the logic fundamentally (maybe change it from
single-threaded to multi-threaded, or from running on 1 server to
distributed), then you need to do a large amount of test refactoring
also. The more tests you have (usually a good thing), the longer it
will take to update all the tests, write new ones, etc. It's worse if
you have to do all this first before you can start updating the code.

Problem 5: Tests are more important than code

You need to justify the extra time spent on writing test code. Tests
are nice, and good to have for code maintainability, but they aren't
an essential feature (unless you're writing critical software for life
support, etc). Clients, deadlines, etc require actual software, not
tests for software (that couldn't be completed on time because you
spent too much time writing tests first ;-)).

Problems like the above sum up why I'm not comfortable with the idea of TDD.

I think that automated tests can be very valuable for maintainability,
making sure that you or other devs don't break something down the
line. But these benefits must be worth the time (and general
inconvenience) spent on adding/maintaining the tests.

If I did start doing some kind of TDD, it would be more of the 'smoke
test' variety. Call all of the functions with various parameters, test
some common scenarios, all the 'low hanging fruit'. But don't spend a
lot of time trying to test all possible scenarios and corner cases,
100% coverage, etc, unless I have enough time for it.

I'm going to read more on the subject (thanks to Ben for the link).
Maybe I have some misconceptions.

David.


From tjreedy at udel.edu  Sat May 24 21:28:26 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 21:28:26 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com>
Message-ID: <g1afbp$5rg$1@ger.gmane.org>


"Benjamin Kaplan" <benjamin.kaplan at case.edu> wrote in message 
news:ec96e1390805241357i6e481e3enf12b4d213e887008 at mail.gmail.com...
| On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzyman at gmail.com> wrote:
|| > For example, at Resolver Systems we expose the spreadsheet object
| > model to our users. It hasa public, documented, API - plus a host of
| > undocumented internally used methods.
| >
| > We would really *much* rather hide these, because anything our
| > customers start using (whether documented or not) we will probably
| > have to continue supporting and maintaining.
| >
| > The 'we told you not to use that' approach, when applied to paying
| > customers doesn't really work... all they see is that you broke their
| > spreadsheet code by changing your API.

Python was not really written with 'difficult' customers in mind ;-)

One could largely hide private vars with a program that substituted random 
names for single _ names, and removed the doc strings for functions, 
classes, and methods with such names.

Such a program could even put such names in a separate module imported as 
'_private_do_not_use_'. 





From Sengly.Heng at gmail.com  Sat May  3 04:36:02 2008
From: Sengly.Heng at gmail.com (Sengly)
Date: Sat, 3 May 2008 01:36:02 -0700 (PDT)
Subject: image matching algorithms
References: <mailman.1780.1205130771.9267.python-list@python.org> 
	<fr48e0$r0a$1@news-int2.gatech.edu>
	<mailman.1816.1205190359.9267.python-list@python.org> 
	<fr4hc2$o9$1@news-int2.gatech.edu>
	<mailman.1880.1205331667.9267.python-list@python.org> 
	<fr9tdv$pth$1@news-int2.gatech.edu>
	<mailman.1903.1205370356.9267.python-list@python.org> 
	<frc854$jms$1@news-int2.gatech.edu>
	<mailman.1939.1205460007.9267.python-list@python.org>
Message-ID: <1cf07f3f-a9bb-4242-bb64-a663845981be@s33g2000pri.googlegroups.com>

On Mar 14, 10:59?am, "Daniel Fetchinson" <fetchin... at googlemail.com>
wrote:
> > > Since you seem to know quite a bit about this topic, what is your
> > > opinion on the apparently 'generic' algorithm described here:
> > >http://grail.cs.washington.edu/projects/query/?
> > > So far it seems to me that it does what I'm asking for, it does even
> > > more because it can take a hand drawn sample image and query the
> > > database for similar photos.
>
> > > There is even a python implementation for it here:
> > >http://members.tripod.com/~edcjones/pycode.html
>
> > > On the histogram method I agree that it won't work partly because of
> > > what you say and partly because it is terribly slow since it's
> > > comparing every single pixel.
>
> > I'm hardly the expert and can't answer authoritatively, but here's my 2c.
>
> > I can't comment as to the actual accuracy of the algorithm, since it
> > will depend on your specific data set (set of photos). The algorithm is
> > sensitive to spatial and luminance information (because of the YIQ
> > colorspace), so there are simple ways in which it will fail.
>
> > The histogram method uses only color, but has a lot of numbers to
> > compare. You may find the histogram method insensitive to spatial
> > relations (a landscape with the mountain on the left and one with the
> > mountain on the right) compared to the wavelet approach.
>
> > This is a relatively old paper, and I've seen other more recent image
> > retrieval research using wavelets (some cases using only the
> > high-frequency wavelets for "texture" information instead of the
> > low-frequency ones used by this paper for "shape") and other information
> > retrieval-related research using lossy compressed data as the features.
> > If you have time, you may want to look at other research that cite this
> > particular paper.
>
> > And just a thought: Instead of merely cutting off at m largest-wavelets,
> > why not apply a quantization matrix to all the values?
>
> I'm not at all an expert, just started to look into image matching, so
> I'm not quite sure what you mean. What's a quantization matrix in this
> context?

Hello,

I am also looking for the solution to the same problem. Could you let
me know if you have found something useful so far?

I appreciate your response.

Thanks a lot.

Sengly


From ulrich at dorda.net  Sun May 25 08:56:37 2008
From: ulrich at dorda.net (ulrich at dorda.net)
Date: Sun, 25 May 2008 05:56:37 -0700 (PDT)
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org> 
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
	<loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>
Message-ID: <79478cee-4bc6-426f-9e64-04841aee1f3d@k37g2000hsf.googlegroups.com>

Thanks a lot to all!

Apart from obtaining the solution I was searching for, I learned a lot
by studying your answers!

Cheers,

Ulrich


From bignose+hates-spam at benfinney.id.au  Fri May  2 23:29:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 13:29:23 +1000
Subject: unified command line args, environment variables,
	.conf file  settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
Message-ID: <87ve1wxdyk.fsf@benfinney.id.au>

smitty1e <smitty1e at gmail.com> writes:

> Just a fun exercise to unify some of the major input methods for a
> script into a single dictionary.
> Here is the output, given a gr.conf file in the same directory with
> the contents stated below:
> 
> smitty at localhost ~/proj/mddl4/test $ ./inputs.py
> {'source_db': '/home/sweet/home.db'}
> smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
> {'source_db': 'test_env'}
> smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
> {'source_db': 'test_cli'}

A good start. However, you need to account for two conventions with
configuration of programs via environment variables:

* Environment variables that will be inherited by subprocesses are
  conventionally distinguished from variables that will not be
  inherited by using an UPPER_CASE name for variables (like process
  config variables) that will be inherited, and a lower_case name for
  variables (like local state variables) that will not be inherited.

* The process environment is a flat namespace, so config environment
  variables need to be named to reduce the risk of namespace collision
  with variables used by other programs. This is often done by
  prefixing the name with the name of the program or system that will
  consume it. e.g. The search path for Python imports is configured
  via an attribute named 'path', but in the environment by a variable
  named 'PYTHONPATH' (yes, I know that's not exactly equivalent, but
  it's a good example).

Neither of these distinctions need to be made in a program-specific
configuration file, so these conventions don't apply there and would
be inappropriate. So you then need to deal with a configuration
setting being named one way in the environment, and another way in the
configuration file and elsewhere in the program.

This is probably best done by a mapping specifically for the
environment variable names:

    config_env_names = {
        'source_db': 'GR_SOURCE_DB',
        }

and then referencing that dictionary when inspecting the environment:

    for key in config.keys():
        # ...
        environ_name = config_env_names[key]
        environ_value = os.environ.get(environ_name)
        if environ_value is not None:
            config[key] = environ_value
        #...

-- 
 \         "Pinky, are you pondering what I'm pondering?" "I think so, |
  `\     Brain, but how will we get a pair of Abe Vigoda's pants?"  -- |
_o__)                                            _Pinky and The Brain_ |
Ben Finney


From budcrandall at hotmail.com  Fri May 30 23:32:47 2008
From: budcrandall at hotmail.com (budcrandall at hotmail.com)
Date: Fri, 30 May 2008 20:32:47 -0700 (PDT)
Subject: compatability
Message-ID: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>

I'm currently using 3ds Max Design 2009 and Maya. Will Python and
Plone be compatible with my systems? I would really like to
incorporate this software. Thank You Bud   budcrandall at hotmail.com.


From kyosohma at gmail.com  Fri May 16 17:19:41 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 14:19:41 -0700 (PDT)
Subject: encoding problem
References: <mailman.1244.1210969808.12834.python-list@python.org>
Message-ID: <b232a065-f36a-408a-a483-77d066344ea5@d45g2000hsc.googlegroups.com>

On May 16, 3:31?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> Hi, guys.
> I'm trying to read an xml file and output some of the nodes. For that, I'm
> doing a
> print node.toprettyxml()
>
> However, I get this exception:
>
> ===
> ? ? out.write(tag.toxml())
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xba' in position
> 190: ordinal not in range(128)
> ===
>
> That happens if I "print" it, or send it to stdout, or send it to a file.
>
> How can I fix it?
> cat file works perfectly, and I'm using an utf8 terminal.
>
> I'm particularly puzzled that it won't work even if I write to a file opened
> in "b" mode. Worst thing is... I don't really need that character, just a
> general idea of how the document looks like.
>
> --
> Luis Zarrabeitia (aka Kyrie)
> Fac. de Matem?tica y Computaci?n, UH.http://profesores.matcom.uh.cu/~kyrie


I recommend studying up on Python's Unicode methods and the codecs
module. This site actually talks about your specific issue though and
gives pointers:

http://evanjones.ca/python-utf8.html

HTH

Mike


From paul.melis at gmail.com  Thu May  1 17:01:42 2008
From: paul.melis at gmail.com (Paul Melis)
Date: Thu, 1 May 2008 14:01:42 -0700 (PDT)
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
Message-ID: <cb700308-c6fe-4f7e-a1d5-37ae8b736f7e@b1g2000hsg.googlegroups.com>

On 1 mei, 22:54, Peter Pearson <ppear... at nowhere.invalid> wrote:
> I'm trying to get started with pyvtk, the Python interface
> to the Visualization Toolkit,

It looks like you're using this package:
http://cens.ioc.ee/projects/pyvtk/

These are not the official Python bindings to VTK, but seem to be an
add-on that allow you to manipulate VTK _files_ from Python.

The official bindings are included in the VTK distribution and can be
enabled at build-time (assuming you build VTK yourself).

For a simple example that will open a window and show some 3D object,
see for example the example code the vtkConeSource class:
http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Examples/Tutorial/Step1/Python/Cone.py?root=VTK&content-type=text/plain

> Simply running "vtk" (apparently 4.0)

VTK 4.0 is really really old. Consider switching to 5.0 at least or
use the CVS version if you feel adventurous.

Hope this helps,
Paul


From jaywgraves at gmail.com  Sun May 18 13:42:50 2008
From: jaywgraves at gmail.com (jay graves)
Date: Sun, 18 May 2008 10:42:50 -0700 (PDT)
Subject: Python library for clustering from distance vector
References: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
Message-ID: <eacbef47-a27a-4fa2-bc96-e09ecff7b8ce@25g2000hsx.googlegroups.com>

On May 17, 11:49 pm, Sengly <Sengly.H... at gmail.com> wrote:
> I am looking for a python library which can cluster similar objects
> into their respective groups given their similarity score of each two
> of them. I have searched the group but I couldn't find any helpful
> information yet.

How about google?  Searching for the terms python and cluster gave
some results for me.

http://www.google.com/search?q=python+cluster


> Any suggestion is appreciated. Also, if you know any specific group
> that I should post this message, please also suggest.

The book, "Programming Collective Intelligence" by Toby Segaran is
great and has examples of clustering algorithms written in Python.

http://www.amazon.com/Programming-Collective-Intelligence-Building-Applications/dp/0596529325/


...
Jay Graves


From gagsl-py2 at yahoo.com.ar  Tue May 13 04:41:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 05:41:35 -0300
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>
	<g0b52s$53r$1@news.mtu.ru>
Message-ID: <op.ua23rlz0x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 01:22:52 -0300, Ivan Illarionov  
<ivan.illarionov at gmail.com> escribi?:
> On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:
>>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
>>> > wrote:
>>>
>>> > > ?can anyone tell me, in python, how to obtain some information of
>>> > > ?a running program?
>>> > > ?paticularly, if i am playing some music in audacious or other
>>> > > ?media player, how can i get the the name and some other info of
>>> > > ?current playing song? It seems that audicious doesn't output on
>>> > > ?run-time --
>>>
>> Your best bet is if the *specific* program you're interested in (e.g.
>> audacious) exposes this information programmatically in some way. It's
>> up to the developers of this application if and how they choose to do
>> it. Even if they do it, there's no requirement that the same API will
>> work for any other program of the same category, unless there is some
>> popular industry standard that most applications implement.
>
> George, have you read my post in this thread? What OP wants is actually
> possible and it's quite easy. X server is the "superprogram" that knows
> the names of all GUI window titles.

That relies on the fact that audacious (or whatever player used) actually  
includes the song name as part of its window title. As G. Sakkis said,  
this depends on the specific program used. And what about "some other info  
of?current playing song"?

-- 
Gabriel Genellina



From __peter__ at web.de  Mon May 26 06:34:33 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 26 May 2008 12:34:33 +0200
Subject: b64encode and unicode problem
References: <mailman.1606.1211797327.12834.python-list@python.org>
Message-ID: <g1e3nn$ddv$01$1@news.t-online.com>

Gabriel Rossetti wrote:

> Hello everyone,
> 
> I am trying to encode a string using b4encode and I get the following
> error :
> 
>  >>> b64encode(u"Salut Pierre, comment ?a va?")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>     encoded = binascii.b2a_base64(s)[:-1]
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in
> position 22: ordinal not in range(128)
> 
> If I remove the "u" infront of the string, it works. The problem is that
> I in my program, the string is given to me un unicode/utf-8. I tried
> several things, but I still get it, How can I get it to work, anybody
> have any idea?

>>> base64.b64encode(u"Salut Pierre, comment ?a va?".encode("utf8"))
'U2FsdXQgUGllcnJlLCBjb21tZW50IMOnYSB2YT8='

unicode is a sequence of codepoints with no predetermined representation as
a byte sequence. Therefore whenever you go from unicode to str you have to
decide upon an encoding. If you don't make that decision python assumes
ascii which will of course fail for non-ascii characters.

Peter



From swapsun at gmail.com  Wed May  7 08:25:25 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 05:25:25 -0700 (PDT)
Subject: Learning question...
Message-ID: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>

Any idea why the following program does not work? I was learning IO on
Python and the following generates a TypeError: range() integer end
argument expected, got str.
I am a beginner.

################################
# print input name (str k), j times using raw_input

def hello():
    j=raw_input("Please type in the number of times you want to print
")
    k=raw_input("Please type in your name ")
    printname(j,k)

def printname(j,k):
          for i in range(j):
                print ("Hello %s" % k)
################################


From martin at marcher.name  Tue May 20 17:11:35 2008
From: martin at marcher.name (Martin Marcher)
Date: Tue, 20 May 2008 23:11:35 +0200
Subject: self.var hmm?
In-Reply-To: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
References: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
Message-ID: <5fa6c12e0805201411y290ba5xd43caf5b78d5a14c@mail.gmail.com>

Hi,

that's because

self.group is not the same as TaskGroup.group

quickish:

class TaskGroup
  group = []
  def __init__(self):
    """
      ## note that all TaskGroup instances now use the the same self.group
    """
    self.group = TaskGroup.group
  def addTask(self, task):
    self.group.append(task)

hth
martin

On Tue, May 20, 2008 at 10:58 PM,  <notnorwegian at yahoo.se> wrote:
> class TaskGroup:
>    def __init__(self):
>        self.group = []
>
>    def addTask(self, task):
>        self.group.append(task)
>
>
> is this wrong? i have a program thats too big to post but should i
> just do group.append in addTask?
>
> reason is when later doing TaskGroup.group i get None
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.xing.com/profile/Martin_Marcher

You are not free to read this message,
by doing so, you have violated my licence
and are required to urinate publicly. Thank you.


From upton at virginia.edu  Thu May 29 10:49:07 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 29 May 2008 10:49:07 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
Message-ID: <5504f9ac0805290749w420259a3n13a65406c69f1bd@mail.gmail.com>

On Thu, May 29, 2008 at 3:36 AM, Duncan Booth
<duncan.booth at invalid.invalid> wrote:
> Dave Parker <daveparker at flamingthunder.com> wrote:
>
>> Catch doesn't return just error types or numbers, it can return any
>> object returned by the statements that are being caught; catch doesn't
>> care what type they are.  For example:
>>
>>   Writeline catch(set x to "hello world".).
>>
>> will write "hello world".
>
> I really don't get this. Surely the point about an error being thrown to a
> catch statement is that the error path is separate from the normal
> execution path? What you are doing here is ensuring that unexpected errors
> have no chance at all of propagating up to the top level: they are
> invariably going to get caught by some other handler that was installed
> just because someone was too lazy to write a set statement followed by a
> writeline.

It also looks like an overloading of catch, semantically similar to the C:

int retcode;
if( retcode = doSomethingThatReturns0or1() ) printf("Hello world");

Again, I don't think you want to start overloading your
exception-handling mechanism.  If you want a set expression to be
equal to the l-value at the end, that's fine, but there's no reason
that catch should evaluate to an object or an integral- or real-valued
exception in error cases, or of the last statement of the block if
there's no error.  (Evaluating a block to be equal to its last
statement is okay, I guess; I know at least that there's a call in
Scheme that lets you do a more imperative programming style in the
functional language--whether that's a good thing is probably a holy
war.)  I just think if you're shooting for an easily understandable
language, overloading error handling requires more thought on the
programmer's part, not less, because they have to reason about all
outcomes.


From unknown_hero007 at hotmail.com  Fri May  9 05:51:13 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 02:51:13 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com>
Message-ID: <2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com>

On 7 touko, 14:25, Unknown Hero <unknown_hero... at hotmail.com> wrote:
> I'll post my code here once I have time to write it, currently I'm
> rather busy. That is merely for optimization suggestions and for
> others who might need the same sort of code I did.
>
> Thank you once again.

Finally managed to get it to work (heh, I was pretty darn lost even
though I had the best help) but as promised, I'll post my code here
for those who might be interested in it. The biggest of thanks to Tim
Golden, who basically walked me step-by-step through this. Most of the
code is copied from his examples above.

<code snippet>
#Goes through all keys and subkeys in the selected hive (defined as
root) and replaces the value 'old' with the value 'new'
#
#IMPORTANT! You should always back up the registry before attempting
to modify it.
#The author of this script CANNOT BE HELD RESPONSIVE for any damage
caused by running this script.
#
#To customize the script to your liking, you can alter the values old,
new, root.
#
#old and new can be any string value
#root has to be one of the following:
#
# _winreg.HKEY_LOCAL_MACHINE
# _winreg.HKEY_CURRENT_USER
# _winreg.HKEY_CLASSES_ROOT
# _winreg.HKEY_USERS
# _winreg.HKEY_CURRENT_CONFIG

import _winreg

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG

}

old = "This was value before"
new = "This is new value"

start = "HKEY_LOCAL_MACHINE\\"
startHandle = _winreg.HKEY_LOCAL_MACHINE

#Values for start and startHandle are: HKEY_LOCAL_MACHINE,
HKEY_CURRENT_USER, HKEY_CLASSES_ROOT, HKEY_USERS, HKEY_CURRENT_CONFIG


class RegKey:

  def __init__ (self, name, key):
     self.name = name
     self.key = key

  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.

  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  try:
    if "\\" not in top: top += "\\"
    root, subkey = top.split ("\\", 1)
#    print "KEY:", root + "\\" + subkey
    key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)
    subkeys = []
    i = 0
    while True:
      try:
        subkeys.append (_winreg.EnumKey (key, i))
        i += 1
      except EnvironmentError:
        break

    values = []
    i = 0
    while True:
      try:
        values.append (_winreg.EnumValue (key, i))
        i += 1
      except EnvironmentError:
        break

    yield RegKey (top, key), subkeys, values

    for subkey in subkeys:
      for result in walk (top + "\\" + subkey):
        yield result

  except WindowsError:
#    print 'Could not open key', root + "\\" + subkey + "\n"
    pass

basickeys = []
i = 0
while True:
  try:
    basickeys.append (_winreg.EnumKey (startHandle, i))
    i += 1
  except EnvironmentError:
    print i, 'subkeys found!'
    break

for x in range(len(basickeys)):
  for key, subkey_names, values in walk (start + basickeys[x]):
#    print key
    for (name, data, type) in values:
#      print "  ", name, "=>", data
      if type == _winreg.REG_SZ and old in data:
        _winreg.SetValueEx (key.key, name, 0, type, data.replace (old,
new))
</code>


Not the most effecient code, I'm sure, but it does what I want it to
do :D

Thank you once more, Tim. Also, thank you, Mike, for your advice on
saving the registry. I would have forgotten to note backing up the
registry in the beginning if it wasn't for you bringing that up. :D


From stefan_ml at behnel.de  Sun May 25 13:46:47 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 25 May 2008 19:46:47 +0200
Subject: which datastructure for fast sorted insert?
In-Reply-To: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <4839A607.7070300@behnel.de>

notnorwegian at yahoo.se wrote:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
> 
> so obv i want fast insert. i want to delete duplicates too.
> 
> which datastructure is best for this?

Keep the data redundantly in two data structures. Use collections.deque() to
append and remove as in a queue, and set() to find duplicates.

Again, no ordering, but very fast insert/delete/dup-check.

Stefan


From Sam.Dutton at itn.co.uk  Fri May 23 02:04:09 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Fri, 23 May 2008 07:04:09 +0100
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com><mailman.1484.1211483172.12834.python-list@python.org>
	<483659b1$0$11621$607ed4bc@cv.net>
Message-ID: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FE3@mx6.ITN.LOCAL>

Thanks for all the answers and comments.

>math.pi is exactly equal to 884279719003555/281474976710656, which is the closest C double to the actual value of pi

So much for poor old 22/7...

Sam
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
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Thank You.




From yves at zioup.com  Wed May  7 19:29:27 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Wed, 07 May 2008 23:29:27 GMT
Subject: slicing lists
Message-ID: <rXqUj.120085$rd2.64592@pd7urf3no>

Is there a way to do:
x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
x[0,2:6]

That would return:
[0, 3, 4, 5, 6]

I am surprised this notation is not supported, it seems intuitive.
A concrete example of the sort of thing I want to do:

p = file('/etc/passwd').readlines()
q = [ e.strip().split(':')[0,2:] for e in p ]

(getting rid of the password / x field)


Thanks.

Yves.
http://www.SollerS.ca



From itskrithika at gmail.com  Fri May  2 13:26:08 2008
From: itskrithika at gmail.com (terry)
Date: Fri, 2 May 2008 10:26:08 -0700 (PDT)
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
Message-ID: <6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>

On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
> On 2008-04-25, terry <itskrith... at gmail.com> wrote:
>
> > I am trying to send a character to '/dev/ttyS0' and expect the
> > same character and upon receipt I want to send another
> > character. I tired withPyserialbut in vain.
>
> Pyserialworks. ?I've been using it almost daily for many
> years. ?Either your program is broken, your serial port is
> broken, or the device connected to the serial port is broken.
>
> > Test Set up:
>
> > 1. Send '%' to serial port and make sure it reached the serial port.
> > 2. Once confirmed, send another character.
>
> > I tried with write and read methods inPyserialbut no luck.
>
> > Can you help?
>
> Ah yes, the problem is in line 89 of your program.
>
> We've no way to help if you don't provide details. If you
> really want help, write as small a program as possible that
> exhibits the problem. ?I'd like to emphasize _small_. The
> larger the program the less likely people are to look at it,
> and the less likely they are to find the problem if they do
> look at it.
>
> Much of the time the exercise of writing a small demo program
> will lead you to the answer. ?If not, then post it, along with
> the output from the program that shows the problem.
>
> Then we can tell you what you did wrong.
>
> --
> Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! I'm also against
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? BODY-SURFING!!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?

Here is the code.

"""Open serial connection"""
	def openSerialConnection(self,serpt):
	    try:
		s1 = serial.Serial(serpt,timeout=10)

	    except:
 	    	self.print_u("Failed to open serial port %s. " %serpt)

	def enterThroughSerialPort(self,serpt):
	    s1 = serial.Serial(serpt,timeout=10)
             self.print_u('Sending !!!!..')
             while True:
                s1.write('*')
	       c = s1.read(1)
	       if c:
		  self.print_u('Found "*" ')
                    break
	    print c
             s1.write('enter\r')
             s1.read('login')

if __name__ == '__main__':
    serpt = '/dev/ttyS0'
    x.openSerialConnection(serpt)
    # funtion to reboot the device goes here ---#
    x.enterThroughSerialPort(serpt)

After opening the serial connection, the device is rebooted followed
by sending '*' to serial port and reading back the same. I seem to
have problem while trying to read '*' back from serial port. First of
all I am not sure if serial port received the '*'.

Thanks!


From arnodel at googlemail.com  Sun May  4 07:56:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 04 May 2008 12:56:48 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
	<c9735621-db58-45a0-b243-1d22651e767f@24g2000hsh.googlegroups.com>
Message-ID: <m2iqxul1tr.fsf@googlemail.com>

bearophileHUGS at lycos.com writes:

> George Sakkis:
>> A faster algorithm is to create a 'key' for each word, defined as the
>> tuple of ord differences (modulo 26) of consecutive characters.
>
> Very nice solution, it uses the same strategy used to find anagrams,
> where keys are
> "".join(sorted(word))
> Such general strategy to look for a possible invariant key for the
> subsets of the required solutions is quite useful.

Or even:

def get_key(word):
    initial = ord(word[0])
    return tuple((ord(x) - initial) % 26 for x in word[1:])

-- 
Arnaud


From hdante at gmail.com  Thu May 22 13:34:32 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 22 May 2008 10:34:32 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com> 
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com> 
	<g13d7u$5gn$1@rumours.uwaterloo.ca>
Message-ID: <664aa0c1-07ab-4603-8eea-1dabc4daba54@59g2000hsb.googlegroups.com>

On May 22, 6:09?am, Ross Ridge <rri... at caffeine.csclub.uwaterloo.ca>
wrote:
> Henrique Dante de Almeida ?<hda... at gmail.com> wrote:
>
> > Finally (and the answer is obvious). 387 breaks the standards and
> >doesn't use IEEE double precision when requested to do so.
>
> Actually, the 80387 and the '87 FPU in all other IA-32 processors
> do use IEEE 745 double-precision arithmetic when requested to do so.

 True. :-/

 It seems that it uses a flag to control the precision. So, a
conformant implementation would require saving/restoring the flag
between calls. No wonder why gcc doesn't try to do this.

 There are two possible options for python, in that case:

 - Leave it as it is. The python language states that floating point
operations are based on the underlying C implementation. Also, the
relative error in this case is around 1e-16, which is smaller than the
expected error for IEEE doubles (~2e-16), so the result is non-
standard, but acceptable (in the general case, I believe the rounding
error could be marginally bigger than the expected error in extreme
cases, though).

 - Use long doubles for archictectures that don't support SSE2 and use
SSE2 IEEE doubles for architectures that support it.

 A third option would be for python to set the x87 precision to double
and switch it back to extended precision when calling C code (that
would be too much work for nothing).


From space.captain.face at gmail.com  Thu May 29 06:26:27 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 03:26:27 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1721.1212054906.12834.python-list@python.org>
Message-ID: <2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>

On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>
> You don't say, but I assume you're on Windows since you mention
> GetFileVersionInfo (which doesn't have anything to do with media
> files, by the way) and WMA. There may be packages out there
> to do all this already but if not you'll need to pull in a few disparate
> modules and mix'n'match.
>
> While ID3 readers (which determine the metadata for MP3) are reasonably
> common few of them come ready-compiled for Windows. I've used Ned
> Batchelder's id3reader [1] successfully for simple tasks so you might try
> that. On the WMA side, you can automate Windows Media Player to get
> metadata. (And it might work for .mp3; I've not tried).
>
> <code>
> import win32com.client
>
> player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
> wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
> try:
>   artist = wmedia.getItemInfo ("Artist")
> finally:
>   player.mediaCollection.remove (wmedia, False)
>
> print "bells.mp3 has artist", artist
>
> </code>
>
> You're going to have to dig around for docs on this one. And it's not
> pretty. Try starting from:
>
> http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>
> TJG
>
> [1]http://nedbatchelder.com/code/modules/id3reader.html

Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
and I just assumed that there must be a way to programmatically get
the stuff you get from choosing properties in the right click menu.
But I guess there isn't (hard to believe, because I can't see MS hard-
coding each and every file format's metadata into it's OS). I might
have to learn more about the command prompt ( I hear there is a module
for fiddling with it) and work from there.

Cheers for the links though, I will be checking them out :)


From http  Wed May  7 02:39:57 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:39:57 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <7xbq3iaa82.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
> In practice, the probability of hijacking of source code by an evil
> corporation is very low for most projects. And even when it did
> happen, the evil corporation would likely submit patches. 

If they're going to submit patches then they shouldn't have any problem
with the GPL.

> The more users an open source project has, the better.

That is simply not a valid premise, as others have explained.  The
priorities of any particular project might give weight to the number
of users or might emphasize something else altogether.  And some
projects are just plain bad (think of malware or spamming tools), so
it's better for the world in general if they fail and have no users
regardless of the developers' wishes.


From lars at gustaebel.de  Tue May 27 08:47:40 2008
From: lars at gustaebel.de (Lars =?iso-8859-1?Q?Gust=E4bel?=)
Date: Tue, 27 May 2008 14:47:40 +0200
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
In-Reply-To: <414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
	<35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>
	<414185e8-26cb-437f-abc5-70cd547450a8@34g2000hsh.googlegroups.com>
Message-ID: <20080527124740.GA23226@axis.g33x.de>

On Tue, May 27, 2008 at 01:51:47AM -0700, sebastian.noack at googlemail.com wrote:
> I have written a FileWrapper class as workaround, which works for me
> (see the code below). The FileWrapper object holds an internal file-
> like object and maps its attributes, but prevents the user (in this
> case tarfile) from closing the internal file, so I can still access
> StringIO's content after closing the TarFile object.
> 
> But this should not be required to create in memory tar files. It is
> definitely a bug, that TarFile closes external file objects passed to
> tarfile.open, when closing the TarFile object. The code which opens a
> file is also responsible for closing it.

You're right, _BZ2Proxy.close() calls the wrapped file object's close() method
and that is definitely not the desired behaviour. So, if you can do without 'bz2'
modes for now, you're problem is gone, all other modes work fine.

I fixed it (r63744), so the next beta release will work as expected. Your test
script helped a lot, thanks.

Regards,

-- 
Lars Gust?bel
lars at gustaebel.de

A casual stroll through a lunatic asylum shows that
faith does not prove anything.
(Friedrich Nietzsche)


From yves at zioup.com  Mon May 12 23:23:30 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:23:30 GMT
Subject: anonymous assignment
In-Reply-To: <Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
	<Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
Message-ID: <SQ7Wj.264445$pM4.99013@pd7urf1no>

Scott David Daniels wrote:
> Yves Dorfsman wrote:
>> ... Sorry this was a typo (again :-), I meant:
>> d = time.local()
>>   y = d[0]
>>   d = d[2]
> Then:
>     y, d = list(time.localtime())[:4:2]
> 

What is this ?
Could you point me to a document on this syntax ?

I've tried it, it works, but I don't understand how.


Thanks.

Yves.


From tarun.kap at gmail.com  Fri May  2 15:04:04 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 12:04:04 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
Message-ID: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>

On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
wrote:
> TkNeo wrote:
> > WHAT ?
>
> > This is crazy
>
> Crazy like a fox?
>
> a = [1, 2, 3]
> try:
>      a.index(99)
> except:
>      a.append(99)
> finally:
>      print a.index(99)
>
> MY question: which exception should I actually be catching there?
> ** Posted fromhttp://www.teranews.com**

ofcouse try catch is going to work but in ideality the index function
should return a -1 and no way in hell crash.


From bruno.desthuilliers at gmail.com  Thu May 15 17:28:05 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 14:28:05 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
Message-ID: <7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>

On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > Why can't I write this?
> > > --
>
> > Because your antecedent is undefined?
>
> Of the two ways to play, just to say #define this per se would be a
> bad move, but that's one that comes from the wrong group.  #define is
> a big scary macro, that python hasn't been using; it's the one-line
> typo.  Instance:
>
> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> Use it to render planes in solids.
>
> Back about 'this', I honestly hadn't remembered 'til this time, when I
> got a chance to reread the subject.  Plus I keep ditching my radio.
>

Jesus H. Christ. This really sounds like my mother in law. Scary,
definitively.


From wuwei23 at gmail.com  Wed May 21 06:15:54 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:15:54 -0700 (PDT)
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
Message-ID: <a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>

On May 21, 7:52 pm, TheSaint <fc14301... at icqmail.com> wrote:
> Hello,
>
> I'm not a master of python :) If I would publish my program for reviewing,
> where should I upload it?

For simple "look at my code" I like http://paste.turbogears.org/

Sample: http://paste.turbogears.org/paste/2697

There's also http://python.pastebin.com, which lets you create a new
paste by modifying an existing one, and keeps them linked for easy
diff'ing.

Sample: http://python.pastebin.com/d3964b241



From notontheweb at noisp.com  Thu May  8 16:29:42 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 20:29:42 GMT
Subject: web client in Python Q
In-Reply-To: <mailman.766.1210253066.12834.python-list@python.org>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>	<mailman.732.1210209312.12834.python-list@python.org>	<DluUj.663832$us.393032@fe04.news.easynews.com>
	<mailman.766.1210253066.12834.python-list@python.org>
Message-ID: <VoJUj.667694$us.200801@fe04.news.easynews.com>

Jerry Hill wrote:
> On Wed, May 7, 2008 at 11:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
>> I wonder why it does not work with
>>
>>  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW
> 
> It looks like that is a subscription site.  That makes things more
> complicated, because it means you'll need to figure out how to log in,
> then probably store cookies related to your session and offer them
> back up to the web server on subsequent requests.  Python has modules
> that help with these things (mostly in the urllib2 module if i recall
> correctly), but it's not quite as straightforward as just fetching a
> URL.
> 
> I don't have time to dig up an example at the moment, but if you're
> still having trouble with it, I can try to pull something together
> this weekend.
> 

Thanks for the help, Jerry.  I do subscribe to that service, but tapping 
the data via Python may be more trouble than it's worth.  I can get all 
the info for stocks and ETF's from finance.google.  All I am missing is 
indexes.  I can probably live without those.  But if you want a 
challenge, have at it.  It would be appreciated.

Jive



From gagsl-py2 at yahoo.com.ar  Sun May  4 19:01:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 20:01:02 -0300
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
Message-ID: <op.uanjj0qux6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 03:35:05 -0300, George Sakkis <george.sakkis at gmail.com> escribi?:
> On May 4, 2:04?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>> En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallo... at invalid.com> escribi?:
>>
>> > I made a function that takes a word list (one word per line, text file)
>> > and searches for all the words in the list that are 'shifts' of
>> > eachother. ?'abc' shifted 1 is 'bcd'
>>
>> But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.
>
> A faster algorithm is to create a 'key' for each word, defined as the
> tuple of ord differences (modulo 26) of consecutive characters. E.g.
> the key of 'acf' is (2,3); 'c' is 2 positions after 'a' and 'f' 3
> positions after 'c'. Shifted words (and only these) have the same key.

Much better! I like it.

-- 
Gabriel Genellina



From ivlenin at gmail.com  Sun May 25 14:27:22 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 18:27:22 GMT
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).

With Ivan's approach, you lose access to the actual lambdas, so you need 
to create a new function and then modify its code object to actually call 
the code; this seems a little clunky to me. You might instead want to 
wrap the lambdas in an object that will do the comparison you want:

class Code(object):
	def __init__(self, func):
		self._func = func
	
	def __cmp__(self, other):
		return cmp(self._func.func_code, other._func.func_code)

	def __call__(self, *args, **kwargs):
		return self._func(*args, **kwargs)

func_set = set(Code(f) for f in funclist)


From clabepa at gmail.com  Wed May 14 04:29:38 2008
From: clabepa at gmail.com (clabepa)
Date: Wed, 14 May 2008 10:29:38 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <mailman.1087.1210718589.12834.python-list@python.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
Message-ID: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>

Stef Mientki wrote:

> I've ran the first real world application through PPyGui-emulator,
> so I think it's time to release the first version.
> There's lot of room for improvements and a more beautiful layout.
> 
> PPyGui-emulator is build upon wxPython and released under BSD license.
> 
> For remarks, screen shots and downloads, see
> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html

Wow! wonderful.
I was searching for it for debugging and easy development purposes,
screenshots sounds promising.

but the api.py link is broken.

> have fun,
> 
> Stef Mientki

Many thanks
Claudio


From vivainio at gmail.com  Wed May  7 06:46:23 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Wed, 7 May 2008 03:46:23 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <8dbb25a6-1306-4670-b835-6fbf999413de@k13g2000hse.googlegroups.com>

On May 6, 10:42 pm, Anton Slesarev <slesarev.an... at gmail.com> wrote:

> flines = (line for line in f if pat.search(line))

What about re.findall() / re.finditer() for the whole file contents?



From brechmos at gmail.com  Sat May 31 15:12:47 2008
From: brechmos at gmail.com (brechmos)
Date: Sat, 31 May 2008 12:12:47 -0700 (PDT)
Subject: parse dates
Message-ID: <0f58a4f7-ba18-4f83-9291-12bc844a37a0@p25g2000hsf.googlegroups.com>

Hi,

I have been using PHP the last while and in particular strtotime.
What I want to replicate is finding the second or fourth Monday of the
next month.  In PHP with strtotime it is easy (strtotime("second
Monday", strtotime("next month"), but I can't find an easy way to do
it in Python.  I have seen DateUtil, but it seems to be able to do
only the simpler parsing (could be wrong).

Any other ideas?


From johnjsal at NOSPAMgmail.com  Sun May 11 23:46:42 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 12 May 2008 03:46:42 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
Message-ID: <4827bda2$0$11606$607ed4bc@cv.net>

Ben Finney wrote:

> John Salerno <johnjsal at gmailNOSPAM.com> writes:
>
>> num = 33
>> 
>> for x in xrange(10):
>>     print num += 1
>
> Which is better done by 'num += 10'.
>
> Can you come up with an example that isn't trivially replaced with
> clearer code? That might make it clearer what your concern is.

::sigh:: No, unfortunately I don't have a strong enough grasp of Python
to give a really in-depth example. I understand what you're asking
though. Perhaps people don't use this idiom as much as I think they do,
so to give a trivial example to support my point isn't helpful.

As far as I know, though, I think this is used often enough, so I
thought I'd just ask if there are purists out there who don't like this
use of the loop and feel it's an abuse of the syntax.


From deets at nospam.web.de  Wed May 14 11:56:11 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 17:56:11 +0200
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
Message-ID: <690ge0F2vj8fiU1@mid.uni-berlin.de>

> When I learned about static methods, I learned they're a way to
> tightly couple some functionality with a class without tying the
> functionality to any of the instances. I see them as nothing more than
> a design decision. To me they make some sense.

Which you can say exactly about classmethods - because there is *no*
instance.
 
> Other than a methods signature (classmethod(cls, l) and a
> staticmethod(l)) a class method does anything that a static method
> does and gets the CLS reference for FREE?

Yes.

> Is this why a static method 
> is considered to be overkill? In other words, either one can be called
> from either the class or the instance and both work pretty much the
> same *but* only the class method includes the class for reference and
> the static method does not?

Yes.
 
> The only real difference I see between an instance and either a class
> or static method is the whole bound/unbound thing. Otherwise, even an
> instance can do what the others do *just* the instance method can only
> make those calls through an instance and not the class.

Which is a pretty heavy distinction. 
 
> Instance methods make the most sense. A static method makes sense too
> *but* I can see how a class method not only does what a static method
> does but how a class method *also* gets the cls reference for free.

I don't understand the last part - but I certainly agree on the "instance
methods make the most sense". But *if* you want a hierarchy
of "sensefulness",

method > classmethod > staticmethod

is the ordering to apply I'd say. Again: classmethods get *more* context
than staticmethods *without* needing an instance. More is better :)

Diez


From gnewsg at gmail.com  Wed May 28 20:26:38 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 28 May 2008 17:26:38 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
Message-ID: <0f0801ab-4fcb-4262-a6d6-fc19401efeb1@m3g2000hsc.googlegroups.com>

On 28 Mag, 23:13, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>
> > Following your posts in this thread, I see that
> > you 'plan to add soon' every cool feature that every other language seems to
> > have.
>
> I've already added a lot of them. ?For example, loops that don't need
> looping variables:
>
> For 1000 times do ...
>
> Explicit infinite loops:
>
> For forever do ...
>
> I don't those are features that every other language seems to have,
> not even Python.
>
> Plus, by this weekend, built-in compiled fullscreen 3D graphics will
> be in, too.
>
> > With no certainty whatsoever that today's program will work on
> > tomorrow's FT.
>
> Kind of like how this year's program won't work on next year's
> Python? ?Except Flaming Thunder is faster. ;)

On 28 Mag, 23:13, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>
> > Following your posts in this thread, I see that
> > you 'plan to add soon' every cool feature that every other language seems to
> > have.
>
> I've already added a lot of them.  For example, loops that don't need
> looping variables:
>
> For 1000 times do ...
>
> Explicit infinite loops:
>
> For forever do ...
>
> I don't those are features that every other language seems to have,
> not even Python.
>
> Plus, by this weekend, built-in compiled fullscreen 3D graphics will
> be in, too.
>
> > With no certainty whatsoever that today's program will work on
> > tomorrow's FT.
>
> Kind of like how this year's program won't work on next year's
> Python?  Except Flaming Thunder is faster. ;)

This is nonsense.
Python 2.x is around since... what is it? Almost 10 years?
It lasted that long maintaining retro-compatibility between the
various versions.
It's very funny that you point your finger at Python's compatibility
as a factor of weakness when your FT breaks it *every week*.
Before trying to convince whoever that your FT is better than Python
you should first decide what to do with your own product by starting
to implement all that *basic* features which are common to all modern
languages (arrays, OOP, error handling, data structures, Unicode
support, etc...).
Once you do that, ask yourself if the way you did it was good/
reliable, ask users what they think about it, and apply changes as
necessary.
At that point you'll be ready to start publicizing FT as an
alternative in respect to other languages.
Currenlty you're trying to push something which is not even a "pre-
alpha" over something else (Python) which has been around since about
20 years and it is known to be one of the cleanest and more elegant
languages around.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From pavlovevidence at gmail.com  Fri May 16 19:03:15 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 16:03:15 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
Message-ID: <6330d8bf-f164-4ae6-8bfb-76c742a72ad2@2g2000hsn.googlegroups.com>

On May 16, 6:38 pm, amit.ut... at gmail.com wrote:
> Hey there,
>
> I have a simple question about python print statement. Take the
> following code snippet for example...
>
> 1 print "-#- executing: %s" % section,
> 2 tests[section] = test.testcase(name=config.get(section,'name'))
> 3 tests[section].runTest()
> 4 printStatus(tests[section])
>
> Now the problem is that line 1 does not get printed until line 4. What
> I thought would happen is that line 1 gets executed and the user sees
> that the statement that the test case is executing. Then after the
> test case executes a "PASS" or "FAIL" appears on the same line as the
> "-#- executing: 0053" statement.
>
> e.g.
> -#- executing: 0053     FAIL
>
> Some tests take a long time to finish thus the screen is blank until
> the entire test finishes and the above statement is outputted.


Your standard output uses line-buffering, which means that the
underlying I/O code stores all the output in memory until it gets a
newline, only then does it send the output to the terminal (or
console, or whatever).

Workarounds to this are as follows:

1. Explicity flush the buffer after any print statements that end with
a comma:

print "whatever",
sys.stdout.flush()

2. Run Python in unbuffered mode, by using the -u switch:

python -u yourscript.py


Carl Banks


From notnorwegian at yahoo.se  Thu May 22 20:02:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 17:02:35 -0700 (PDT)
Subject: spider, why isnt it finding the url?
Message-ID: <08c10a3d-8cb8-433f-9831-cecf8fb7095b@y21g2000hsf.googlegroups.com>

this program doesnt produce any output, however i know from testing
that the url-regexp matches urls...

import urllib
import re

site = urllib.urlopen("http://www.python.org")

email = re.compile(r'[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}')
url = re.compile("^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]{1}
([\w\-]+\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?
((\?\w+=\w+)?(&\w+=\w+)*)?")

for row in site:
    obj = url.search(row)
    if obj != None:
        print obj.group()


From guibog at gmail.com  Sat May 17 23:14:19 2008
From: guibog at gmail.com (Guillaume Bog)
Date: Sun, 18 May 2008 11:14:19 +0800
Subject: Shelve or pickle module
Message-ID: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>

Hello,

I read and re-read "Python in a Nutshell" written by Alex Martelli,
who knows what he is talking about. I'm a bit new to python and I'm
going to start doing persistence side on a project. Martelli's book
seems to tell me that I should use shelve module, but any code I
browsed is using pickle instead. Is there any reason to prefer pickle
over shelve?

Thanks,


From banibrata.dutta at gmail.com  Sat May 10 00:38:24 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sat, 10 May 2008 10:08:24 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <g02ale$lnj$1@ger.gmane.org>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
Message-ID: <3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>

Thanks, Gabriel and Terry, for your responses.

Another somewhat realted, but very noob'ish question --

given that I already have Python2.5 installed & will install Python2.4, will
copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
i think the answer is "no", but still asking. is it package specific ?

does it matter if the packages were egg drops ?

On 5/10/08, Terry Reedy <tjreedy at udel.edu> wrote:
>
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message
> news:op.uav4dutjx6zn5v at a98gizw.cpe.telecentro.net.ar...
> En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta
> <banibrata.dutta at gmail.com> escribi?:
>
> |> I already have Python25, and need to install Python24. I would prefer
> not to
> |> remove Python25, but each Python version seems to update the registry, I
> |> guess (not sure), overwriting each other's entries. Any way to have both
> |> versions ?
>
> |They can coexist peacefully. The last one you install will be the default
> |version to handle .py files automatically.
>
> Since 2.5 at least, the Windows installer gives the option to make the new
> installation the default or not.  One might have to choose 'custom' versus
> 'auto' (don't remember for Python), but I do the latter always anyway.
>
> tjr
>
>
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From arne at vajhoej.dk  Sat May 31 20:30:45 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Sat, 31 May 2008 20:30:45 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <g1qobk02jbj@news4.newsguy.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
Message-ID: <4841edb4$0$90265$14726298@news.sunsite.dk>

szr wrote:
> Arne Vajh?j wrote:
>> Stephan Bour wrote:
>>> Lew wrote:
>>> } John Thingstad wrote:
>>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> } > I don't like the style, but many do.
>>> }
>>> } Please exclude the Java newsgroups from this discussion.
>>>
>>> Did it ever occur to you that you don't speak for entire news groups?
>> Did it occur to you that there are nothing about Java in the above ?
> 
> Looking at the original post, it doesn't appear to be about any specific 
> language.

That does not make it on topic in the Java group.

And the subthread Lew commented on most certainly is not.

Arne


From nayden at gmail.com  Mon May 26 12:13:27 2008
From: nayden at gmail.com (nayden)
Date: Mon, 26 May 2008 09:13:27 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <56acb43d-071e-4416-b8af-6b210d1c8b2f@56g2000hsm.googlegroups.com>

Thanks everyone for the helpful suggestions.


From roy at panix.com  Sun May 25 10:39:06 2008
From: roy at panix.com (Roy Smith)
Date: Sun, 25 May 2008 10:39:06 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<69t0qlF356llmU1@mid.uni-berlin.de>
Message-ID: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

> > I agree that tests should not depend on each other, but sometimes it's 
> > still useful to have the tests run in a certain order for reporting 
> > purposes.
> 
> Then sort your report. Seriously. A test-outpt shoud be in a way that 
> delimits individual testresults in a way that makes them easily 
> extractable. Then if you want them to be ordered for e.g. diff'ing - 
> sort them.
> 
> Diez

Here's an example of why *running* tests in order can make sense.

You could have a bunch of tests of increasing complexity.  The first bunch 
of tests all run in a few seconds and test some basic functionality.  From 
experience, you also know that these are the tests that are most likely to 
fail as you port to a new environment.

There's also some tests which take a long time to run.  If the basic stuff 
that's being tested by the earlier tests doesn't work, there's no way these 
tests could pass, but they still take a long time to fail.

It's really handy to have the simple tests RUN first.  If you see they 
fail, you can cancel the rest of the test run and get on with fixing your 
code faster.

It's a good thing to make it easy to do things the right way, and difficult 
to do things the wrong way.  The danger is when you let your pre-conceived 
notions of right and wrong trick you into making it difficult to do things 
any way but YOUR way.

So far, the strongest argument I've seen against the OP's idea is that it's 
not portable to Iron Python.  That's a legitimate argument.  All the rest 
of the "You're not supposed to do it that way" arguments are just religion.


From johnroth1 at gmail.com  Wed May  7 17:20:59 2008
From: johnroth1 at gmail.com (John Roth)
Date: Wed, 7 May 2008 14:20:59 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org> 
	<b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com>
Message-ID: <387351b2-cea5-4206-874d-6dfb94fda94b@8g2000hse.googlegroups.com>

On May 7, 3:03 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
>
> > M?ta-MCI (MVP) wrote:
> > > Hi!
>
> > >> I don't often feel like using this word
>
> > > Look at languages like OCAML or F #
>
> > > @-salutations
>
> > Well of course, we're all well aware of other languages that allow
> > variables to be bound in the middle of an expression.  It's just that
> > Python was purposely created without that (mis)feature because it's so
> > unclear, and easy to abuse.
>
> This is the same argument that has been used to justify the lack of MI
> and operator overloading in Java.
>
> Not that I would support having assignment as expressions in Python
> (wouldn't fit the whole design IMHO), but this is still a somewhat
> arbitrary design choice, not necessarily a GoodThing(tm) by itself -
> well designed expression-based languages have their strength too.

Clearly this leaves C and C++ out [grin]. After all, a significant
problem in those languages is confusing = and ==. I wouldn't mind
seeing a way of assigning in the middle of an expression because it
comes up fairly frequently when one needs to do a test and save the
result at the same time. However I absolutely do not want to see the
operator be =.

However, if it's not =, then it opens another can of worms, that is,
what to call it, and where it fits into the precedence structure. <--
might work.

John Roth


From notnorwegian at yahoo.se  Sat May 24 22:34:26 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 19:34:26 -0700 (PDT)
Subject: class-oriented rather than object-oriented?
Message-ID: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>

i have some confusion over this.

sure a class is basically a classification, like for example an animal
or flower. and an object/instance of that class is then for example a
cat.

an object is an instance of a class. that i know, i also know how to
program with classes etc.

i am just confused about the term object-oriented.

wouldnt class-oriented be more fitting? at least for java since what
you do is divide everything into classes.

in python i dont or at leats not as much.


does object-oriented refer to that everything(strings, ints etc) are
all objects? so there is a class string somewhere in the
implementation rather than a primitive or somehing?

are python functions objects?

can a functional language be object-oriented or an objectoriented
language be functional?
one definition of OO is a language that passes messages between
objects. but not necessarily that is has to pass message sbetween
classes?


From bj_666 at gmx.net  Sat May  3 13:34:29 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 3 May 2008 17:34:29 GMT
Subject: pygame: rect moveto?
References: <7360a3b3-61b8-4cb9-b4d7-177c532bc880@b1g2000hsg.googlegroups.com>
Message-ID: <683m15F2rmn3gU1@mid.uni-berlin.de>

On Sat, 03 May 2008 09:51:06 -0700, globalrev wrote:

> http://www.pygame.org/docs/ref/rect.html#Rect.move
> 
> well i need to put my rect ina specific place and i donw know from
> where i will move it so i need a function rect.moveTo(x,y).
> 
> how do i do that?

No need for a function or method::

  rect.topleft = (x, y)

Ciao,
	Marc 'BlackJack' Rintsch


From jgodoy at gmail.com  Sun May  4 07:08:09 2008
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 May 2008 08:08:09 -0300
Subject: about bsddb module
References: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>
	<22b79613-2346-4eb0-afb3-46542940c2ad@b5g2000pri.googlegroups.com>
Message-ID: <p6i0f5-oaf.ln1@strongwill.g2ctech>

cocobear wrote:

> On 5?3?, ??7?17?, cocobear <cocobear... at gmail.com> wrote:
>> How to deal with multiple databases in an file. I want to get the
>> content of several databases.

(...)
 
> Anybody can help me?

I believe you can only have one database per file with the Python
abstraction...  But you can try this (straight from Google for "sleepycat
multiple databases" and sleepycat came from the docs for bsddb):

http://www.nextgen6.net/docs/db4.1.25/api_java/db_open.html

and pay attention to the details here:

http://forums.oracle.com/forums/thread.jspa?threadID=581528&tstart=15





From eckhardt at satorlaser.com  Wed May 28 06:25:23 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Wed, 28 May 2008 12:25:23 +0200
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
	<c23adf49-c644-4ae0-8724-d0a2c91fb430@k30g2000hse.googlegroups.com>
Message-ID: <khovg5-mub.ln1@satorlaser.homedns.org>

Chris wrote:
> On May 28, 11:08?am, dave_140... at hotmail.com wrote:
>> Say I have a file, utf8_input, that contains a single character, ?,
>> coded as UTF-8:
>>
>> $ hexdump -C utf8_input
>> 00000000 ?c3 a9
>> 00000002
[...]
> weird thing is 'c3 a9' is ?? on my side... and copy/pasting the ?
> gives me 'e9' with the first script giving a result of zero and second
> script gives me 1

Don't worry, it can be that those are equivalent. The point is that some
characters exist more than once and some exist in a composite form (e with
accent) and separately (e and combining accent).

Looking at http://unicode.org/charts I see that the letter above should have
codepoint 0xe9 (combined character) or 0x61 (e) and 0x301 (accent).

0xe9 = 1110 1001 (codepoint)
0xc3 0xa9 = 1100 0011  1010 1001 (UTF-8)

Anyhow, further looking at this shows that your editor simply doesn't
interpret the two bytes as UTF-8 but as Latin-1 or similar encoding, where
they represent the capital A with tilde and the copyrigth sign.

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From skanemupp at yahoo.se  Tue May 13 14:18:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:18:31 -0700 (PDT)
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
Message-ID: <fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>

On 13 Maj, 18:59, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
>
> > if i do something like
> > while 1:
> >     print "x"
>
> > will the program ever stop because it runs out of memory?
>
> No, there is no reason to run out of memory. This will simply
> make an everlasting x-printer and there is no need to store
> anything (except output buffers, terminal scrollback, etc.,
> but all of this is temporary and of limited size). In case of
> adding elements to a list, the memory usage can, of course,
> grow unlimitedly. On linux, if the process eats up too much
> memory, it gets killed. I do not know about windows, but
> they would probably crash with a BSOD or something of that
> sort.


and when the program get skiled because out of memory all this will be
deleted from the memory?

so there is no way that you can, by accident, fill your whole
harddrive and make it unusable?

and RAM-memory always get cleaned out when not used i guess?


From gherron at islandtraining.com  Tue May 13 17:12:57 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 14:12:57 -0700
Subject: variable scope question?
In-Reply-To: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>
References: <0b0ffc2e-4a41-4399-b1bf-68b80ea00605@k13g2000hse.googlegroups.com>
Message-ID: <482A0459.5000503@islandtraining.com>

globalrev wrote:
> http://mail.python.org/pipermail/python-list/2003-October/233435.html
>
> why isnt it printing a in the second(second here, last one in OP)
> example before complaining?
>
> def run():
>   a = 1
>   def run2(b):
>     a = b
>     print a
>   run2(2)
>   print a
> run()
>
> def run():
>   a = 1
>   def run2(b):
>     print a
>     a = b
>   run2(2)
>   print a
> run()
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
If you had told us what error you got, I would have answered you hours 
ago.   But without that information I ignored you until is was 
convenient to run it myself.  Now that I see no one has answered, and I 
have time to run your examples, I see the error produced is

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in run
  File "<stdin>", line 4, in run2
UnboundLocalError: local variable 'a' referenced before assignment

and its obvious what the problem is. 

In run2 (of the second example),  The assignment to a in the line "a=b" 
implies that a *must* be a local variable.    Python's scoping rules say 
that if "a" is a local variable anywhere in a function, it is a local 
variable for *all* uses in that function.  Then it's clear that "print 
a" is trying to access the local variable before the assignment gives it 
a value.

You were expecting that the "print a" pickups it the outer scope "a" and 
the assignment later creates a local scope "a",  but Python explicitly 
refuses to do that.

Gary Herron



From kay.schluehr at gmx.net  Fri May 16 08:07:32 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Fri, 16 May 2008 05:07:32 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>

On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> Hello all,
>
> Yesterday we found the cause of a bug that has caused problems for a long time.
> It appeared to be the following:
>
> class A(object):
>     pass
>
> print min(1.0, A())
>
> which is accepted by Python even though the A() object is not numerical in
> nature.
>
> The cause of this behavior seems to be the compare operation of the object
> class.
>
> Is there a way to disable this behavior in Python (other than deriving a new
> 'object-like' class that doesn't do comparisons?)
>
> Sincerely,
> Albert

Are you sure you don't want to use a statically typed language that
captures all type errors just by inspecting your source code?


From maxwell.newlands at gmail.com  Fri May 16 07:50:40 2008
From: maxwell.newlands at gmail.com (max)
Date: Fri, 16 May 2008 04:50:40 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
	<24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>
	<325be043-d911-4cce-9c3b-56209033cd68@d45g2000hsc.googlegroups.com>
Message-ID: <fb4cda98-11a6-4be1-b1b4-e2c32e5dedd3@m73g2000hsh.googlegroups.com>

On May 15, 10:31?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:49?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
> > On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>
> > > On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > > > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > > > work:
>
> > > > > > > > from mutagen.mp3 import MP3
> > > > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > > > [snip]
> > > > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > > > contents.
>
> > > > > > cool, so how do i give it the path, if not in the form of a URL
> > > > > > string? ?maybe this is obvious...
> > > > > > --
> > > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > > It doesn't look like you can, with mutagen. So, time to find a different
> > > > > library that supports arbitrary file objects instead of only file paths.
> > > > > I'd suggest starting here:
> > > > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > > > Possibly one with actual documentation, since that would also be a step
> > > > > up from mutagen.
>
> > > > After a bit of time looking around, looks like nearly all the python id3
> > > > modules expect to work with filenames, instead of file objects.
>
> > > > I can't vouch for it, and the documentation still looks sparse, but this
> > > > module at least looks capable of accepting a file object:
> > > >http://pypi.python.org/pypi/tagpy
>
> > > > Looks like it'd be a challenge to build if you're on windows, since it
> > > > depends on an external library.
>
> > > > Alternately, you could probably create a subclass of the mutagen stuff
> > > > that used an existing file object instead of opening a new one. No idea
> > > > what that might break, but seems like it would be worth a try.
>
> > > > As last ditch option, could write the first few kb of the file out to a
> > > > temp file and see if mutagen will load the partial file.
>
> > > Okay, now I'm officially spending too much time looking through this
> > > stuff.
>
> > > However, looks like the "load" method of the MP3 class is what you'd
> > > want to override to change mutagen's file loading behavior. Probably
> > > pass the URL as the filename, and take a cut & paste version of the
> > > default load method from ID3FileType and change it to use urllib2 to
> > > open it instead of a local file open.
>
> > > Might work. Might not. No warranty express or implied.
> > > --
> > > John Krukoff <jkruk... at ltgc.com>
> > > Land Title Guarantee Company- Hide quoted text -
>
> > > - Show quoted text -
>
> > I'm supposed to question "time.toomuch.spend". ?NAMERS!- Hide quoted text -
>
> > - Show quoted text -
>
> Is there a way 'time.toomuch.spend' can be scanned for in code? ?If
> not, let's play!

really, really appreciate your help, john.  gonna have to ponder my
next move here...


From aahz at pythoncraft.com  Sun May  4 16:19:05 2008
From: aahz at pythoncraft.com (Aahz)
Date: 4 May 2008 13:19:05 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
	<mailman.554.1209926677.12834.python-list@python.org>
Message-ID: <fvl5np$a8d$1@panix3.panix.com>

In article <mailman.554.1209926677.12834.python-list at python.org>,
Gary Herron  <gherron at islandtraining.com> wrote:
>
>However, the upshot of all of this is that one must maintain extreme 
>skepticism.   Unless you know both your Python code and any extension 
>modules you call, and you know them at a level necessary to find such 
>details, you must conclude that any operation, no matter how atomic it 
>my look, may in fact not be atomic. 

Absolutely.  Note that your statement is insufficiently encompassing:
any Python library code might easily use classes that define special
methods that cause GIL release.

This is why those of us who champion correct use of threads say that the
only easy way to create working threaded programs is to pass objects
around in Queues and never never never use an object in multiple threads.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From arnodel at googlemail.com  Sun May 18 14:44:56 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 18 May 2008 19:44:56 +0100
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <m2r6bz78pj.fsf@googlemail.com>

"Matt Porter" <mabbikeel at gmail.com> writes:

> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more
> succinct, but a solution is currently escaping me.
>
>
> def compress_str(str):
>     new_str = ""
>     for i, c in enumerate(str):
>         try:
>             if c != str[i+1]:
>                 new_str += c
>         except IndexError:
>             new_str += c
>     return new_str
>
>
> Cheers
> Matt
> -- 
> --

>>> string = 'sssssssssspppppppaaaaaaam'
>>> ''.join(x for x, y in zip(string, '\0'+string) if x != y)
'spam'

HTH

PS: I keep seeing problems on this list whose solution seems to
involve 'window' iterating over a sequence. E.g.

>>> list(window('eggs', 2))
[('e', 'g'), ('g', 'g'), ('g', 's')]

-- 
Arnaud


From caca at mailinator.com  Sat May 31 08:09:32 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Sat, 31 May 2008 05:09:32 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <mailman.1787.1212192138.12834.python-list@python.org>
Message-ID: <645bddab-3ab9-472a-b162-4ef466af5abf@26g2000hsk.googlegroups.com>


  Have you seen this page?
    http://matplotlib.sourceforge.net/screenshots.html
  On watching this, I wouldn't say matplotlib is inferior to matlab
plotting. Also, I don't know what they use in sage, but they have 3D
plots of surfaces that you can rotate with the mouse.
  Do as you like, but if you want to "intergrate as many exsiting
computation libraries as possible" you may end up doing something too
similar to sage. I wouldn't want to go on such a trip alone, so even
if sage is not exactly what I would do, I will probably work with
them. Their client-server approach should make it easy to work on a
cool interface without messing too much with their code. It's true,
you'll have to carry with you a lot of symbolic computation tools that
may be you don't need as an engineer, but is it that important? The
client-server approach has other advantages: if you have a very
lightweight computer (like EEE), you can place the server at home and
the lightweight computer is enough to have a full scientific
environment outdoors. And yes, I'm pretty sure you can call any
library from within sage the same way you'd do it from python.
 Regards
Pablo


From gnewsg at gmail.com  Tue May 13 14:52:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 11:52:03 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com> 
	<cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>
Message-ID: <211ce0e0-4196-49ab-af35-17877ca78568@w7g2000hsa.googlegroups.com>

On 13 Mag, 18:35, "ludvig.eric... at gmail.com"
<ludvig.eric... at gmail.com> wrote:

> Anyway, I went for a subclassing way of dealing with it, and it works
> fine.

As Josiah already stated pay attention to the changes that will be
applied to asyncore internals in Python 2.6 and 3.0 (in detail you
could take a look at how things will be changed by taking a look at
the patch provided in bug #1736190).
Your subclass could not work on all implementations.

--- Giampaolo
http://code.google.com/p/pyftpdlib


From hniksic at xemacs.org  Thu May  8 17:35:04 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 08 May 2008 23:35:04 +0200
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de>
Message-ID: <8763tofpiv.fsf@mulj.homelinux.net>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
>> The thing is, I'm not using slots by choice.  I'm using the standard
>> lib "socket" class, which apparently uses slots.
>
> `socket` objects can't be pickled.  Not just because of the
> `__slot__`\s but because a substantial part of their state lives in
> the operating system's space.

Of course, if it makes sense to pickle sockets in the application, one
is can do so by defining __getstate__ and __setstate__:

class Connection(object):
    def __init__(self, host, port):
        self.host = host
        self.port = port
        self.init_sock()

    def init_sock(self):
        self.sock = socket.socket()
        self.sock.connect((host, port))
        ... init communication ...

    def __getstate__(self):
        # pickle self as a (host, port) pair
        return self.host, self.port

    def __setstate__(self, state):
        # reinstate self by setting host and port and
        # recreating the socket
        self.host, self.port = state
        self.init_sock()


From yves at zioup.com  Wed May  7 22:53:31 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 08 May 2008 02:53:31 GMT
Subject: class definition
In-Reply-To: <mailman.730.1210208367.12834.python-list@python.org>
References: <K5rUj.249337$pM4.157639@pd7urf1no>
	<mailman.730.1210208367.12834.python-list@python.org>
Message-ID: <LWtUj.249781$pM4.74568@pd7urf1no>

Miles wrote:

> In Python 2.2, classes and types were unified.  If a class inherits
> from object (or any other built-in), it is considered a "new-style"
> class; otherwise, it is an old-style (or classic) class.  There are
> some differences in their behavior; most notably, descriptors
> (computer properties) will not work with old-style classes.  Old-style
> classes will go away in Python 3 (I think), and all classes will have
> object as a base.
> 
> An introduction to new-style classes:
> http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html
> A guide to descriptors:
> http://users.rcn.com/python/download/Descriptor.htm
> The reference manual on the distinction:
> http://docs.python.org/ref/node33.html
> The technical explanation:
> http://www.python.org/download/releases/2.2.3/descrintro/

Thanks Miles, I've started to go though those links, that should keep me 
busy for a while !

Yves.
http://www.SollerS.ca


From bronger at physik.rwth-aachen.de  Fri May 30 03:39:44 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 30 May 2008 09:39:44 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
Message-ID: <87skw0s0jj.fsf@physik.rwth-aachen.de>

Hall?chen!

Duncan Booth writes:

> [...]
>
> I don't understand your problem: it's just a single thread so
> killfile or skip it.

Although I agree with you that there is no problem, *this* is not a
good justification for this thread.  One should stay on topic in
*every* thread.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From cocobear.cn at gmail.com  Sun May  4 01:06:59 2008
From: cocobear.cn at gmail.com (cocobear)
Date: Sat, 3 May 2008 22:06:59 -0700 (PDT)
Subject: about bsddb module
References: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>
Message-ID: <22b79613-2346-4eb0-afb3-46542940c2ad@b5g2000pri.googlegroups.com>

On 5?3?, ??7?17?, cocobear <cocobear... at gmail.com> wrote:
> How to deal with multiple databases in an file. I want to get the
> content of several databases.
>
> it's the code I wrote:
>
> [cocobear at cocobear ~]$ python
> Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
> [GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> importbsddb
> >>> import os
> >>> import time
>
> >>> db_file = 'native.db'
> >>> db =bsddb.db.DB()
> >>> db.open(db_file,bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
> >>> dbs = db.keys()
> >>> db.open(db_file,dbs[0],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
> >>> db.keys()
>
> ['\x01\x00\x00\x00', '\x02\x00\x00\x00', '\x03\x00\x00\x00',
> '\x04\x00\x00\x00', '\x05\x00\x00\x00']
>
> >>> db.open(db_file,dbs[1],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>
> the program stop here.


Anybody can help me?


From wuwei23 at gmail.com  Tue May 13 22:54:14 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 19:54:14 -0700 (PDT)
Subject: 2004 example, passing function error
References: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
Message-ID: <44816313-c296-4730-8f7c-15f0c24604a0@z16g2000prn.googlegroups.com>

On May 14, 11:40 am, globalrev <skanem... at yahoo.se> wrote:
> so just a mistake on his part? but it looks like he just copied his
> shell...has there been a change since 2004 inr egards to how you can
> pass functions as arguments to functions??

Adding the value argument (x) to the compose function really limits
its usefulness as well. Given the author was talking about functions
as first class objects, it makes more sense for compose to return a
function, rather than to perform several function calls and return a
value.

Here, compose creates a new function that performs first 'f' then 'g'
on a value:

>>> def compose(f, g):
...     def _compose(x):
...         return f(g(x))
...     return _compose
...
>>> compose(sqr, cube)
<function _compose at 0x00B7BEB0>
>>> compose(sqr, cube)(2)
64

The advantage being you can easily create function chains this way:

>>> sqrcube = compose(sqr, cube)
>>> sqrcube(2)
64

And because they're functions, you can use them with compose to
construct more complex functions:

>>> cubesqrcube = compose(cube, sqrcube)
>>> cubesqrcube(2)
262144

Just to show they're functionally the same:

>>> cubesqrcube(2) == cube(sqrcube(2)) == cube(sqr(cube(2)))
True

I like this approach because it separates the function composition
from its execution. But you can also achieve much the same by using
functools.partial (in 2.5+):

>>> def compose(f, g, x): return f(g(x))
...
>>> compose(sqr, cube, 2)
64
>>> from functools import partial
>>> sqrcube = partial(compose, sqr, cube)
>>> sqrcube(2)
64
>>> cubesqrcube = partial(compose, cube, sqrcube)
>>> cubesqrcube(2)
262144

Hope this helps.

- alex23


From ohad911 at gmail.com  Wed May 21 07:51:56 2008
From: ohad911 at gmail.com (ohad frand)
Date: Wed, 21 May 2008 14:51:56 +0300
Subject: problem with import / namespace
Message-ID: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>

Hi
I have a problem that the solution to it must be very simple but i couldnt
fint it's answer in the internet so far (i searched for couple of days)
the problme is as follows:

i have two directories e.g. "\\1" and "\\2"
in each directory i have two files with the same names e.g. "tmp1.py" and
"tmp2.py"
each tmp2.py file imports tmp1 from its same directory (import tmp1) - thats
the problem
if i execute one file (\\1\tmp2.py) than the execution is ok
but when i try after that to execute the second file (\\2\tmp2.py) than the
tmp1 file from the wrong directory ( - directory 1 in this case) is imported
instead.
i tried many things to try to solve it, i removed the previous path from
sys.path and added the new one, i tried to change current working directory
with os.chdir()
I tried to delete from locals and from globals the name tmp1 before running
the second file but nothing worked.
please help

Thanks,
Ohad
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From aztnat at 163.com  Tue May 13 10:09:51 2008
From: aztnat at 163.com (aztnat at 163.com)
Date: Tue, 13 May 2008 07:09:51 -0700 (PDT)
Subject: Threader Earrings -- A Fashion Jewelry Success Story
Message-ID: <3933d207-7ef3-4a68-887e-7486e6b8f5f7@c19g2000prf.googlegroups.com>

New jewelry fashions need several factors going for them if they are
to succeed. These include aesthetics, price, timing, and maybe even
just sheer, plain luck. Threader earrings seem to have all these
qualities in abundance. Also known as earthreads or ear strings,
threader earrings have a very large following, especially among the
young set, who think that they are and cool.

Threader earrings are exactly what they sound like: a length of a thin
chain that the wearer threads through one or more ear piercings. The
chain is attached to a small metal bar ? called a lead -- on one end,
and the other end is adorned with decorative materials such as gems,
beads, or crystals. The wearer first inserts the lead, slides the
chain through the piercing and then just lets the earring dangle.
Threader earrings are especially attractive in individuals with two or
more earlobe piercings because they can mix and match designs, and
even knot or weave the chains of the threader earrings together to
create a funky effect.

The chains used are very thin, delicate and light. They usually
measure from three to five inches and are often made from metals such
as gold vermeil and sterling silver. Influenced by the decorative
ornaments used, the themes of threader earrings? designs range from
the playful to the sophisticated. Pearl embellishments impart a sense
of elegance, while multicolored vintage crystals or flashy glass beads
make threader earrings perfect for casual wear.

Young celebrities, or those counting themselves as members of the X
and

http://users6.nofeehost.com/jecky/html/Bothsexes/20061002/47598.html



From wizzardx at gmail.com  Sun May 25 16:54:05 2008
From: wizzardx at gmail.com (David)
Date: Sun, 25 May 2008 22:54:05 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <g1cic3$3e9$1@panix3.panix.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
Message-ID: <18c1e6480805251354h3f306866jef4229a1b3b060d@mail.gmail.com>

>
> You must have poor project management/tracking.  You WILL pay the cost
> of testing, the only question is when.  The when does have an impact on
> other aspects of the development process.
>
> Speaking as someone who started in my current job four years ago as the
> third developer in a five-person company, I believe that your claim about
> the differences between small companies and large companies is specious.
> --

Might be a difference in project size/complexity then, rather than
company size. Most of my works projects are fairly small (a few
thousand lines each), very modular, and each is usually written and
maintained by one developer. A lot of the programs will be installed
together on a single server, but their boundaries are very clearly
defined.

Personally I've had to do very little bug fixing and maintenance.
Thorough testing of all my changes before they go into production
means that I've caught 99% of the problems, and there is very little
to fix later.

That's why I'm surprised to hear that such a huge amount of time is
spent on testing maintenance, and why the other posters make such a
big deal about unit tests.

I'm not a genius programmer, so it must be that I'm lucky to work on
smaller projects most of the time.

David.


From petr.poupa at gmail.com  Tue May 13 13:41:43 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Tue, 13 May 2008 10:41:43 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.996.1210619207.12834.python-list@python.org>
Message-ID: <1ac03741-176a-4e70-a220-b854098fdec4@t54g2000hsg.googlegroups.com>

On 12 Kv?, 21:06, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.po... at gmail.com wrote:
> > [snip]
>
> >My script send me via 3883 port (VRPN) data, but only once. I need
> >listening this port countinously.
> >So I need  make some loop to print data from 3883 port permanent.
> >Data that I recevied looks liek this:
>
> >receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'
>
> I'm not sure if you need to write a server or a client.  In your
> original code, you had a client which repeatedly established out-
> bound connections.  Here, you say you need to listen on a port.
>
>
>
> >Do you think its necessary to use Twisted? Do you have any ideas how
> >to do it with socket modul?
>
> The basic version is pretty easy either way.  However, with Twisted,
> you get cross-platform error handling without any extra effort, and
> you don't have to think about the boring low-level details of BSD
> sockets.
>
> Here's a Twisted server that listens on port 3883 forever and prints
> the data it receives from each connection after the remote side drops
> the connection:
>
>     from twisted.internet import reactor
>     from twisted.internet.protocol import ServerFactory, Protocol
>
>     class PrintingProtocol(Protocol):
>         def connectionMade(self):
>             """
>             When the connection is first established, create a list
>             into which to buffer all received data.
>             """
>             self.received = []
>
>         def dataReceived(self, data):
>             """
>             Whenever any data is received on this connection, add it
>             to the buffer.
>             """
>             self.received.append(data)
>
>         def connectionLost(self, reason):
>             """
>             When the connection is lost, print out the contents of
>             the receive buffer.
>             """
>             print repr("".join(self.received))
>
>     # Create a factory which will use our protocol to handle incoming
>     # connections.
>     factory = ServerFactory()
>     factory.protocol = PrintingProtocol
>
>     # Listen with it on port 3883
>     reactor.listenTCP(3883, factory)
>
>     # Start the reactor.  Nothing in this program will ever stop the
>     # reactor, so it will run and accept connections forever.
>     reactor.run()
>
> If you were to use the socket module, then it would look something like this:
>
>     from socket import socket
>     from errno import EINTR
>
>     port = socket()
>     port.bind(('', 3883))
>     port.listen(5)
>     while True:
>         try:
>             server, clientAddr = port.accept()
>         except socket.error, e:
>             print "Error accepting client connection", e
>         else:
>             received = []
>             while True:
>                 try:
>                     bytes = server.recv(1024 * 16)
>                 except socket.error, e:
>                     if e.errno == EINTR:
>                         continue
>                     else:
>                         break
>                 if not bytes:
>                     break
>                 received.append(bytes)
>             print repr("".join(received))
>
> Hope this helps,
>
> Jean-Paul

Thanks for code. I am trying both of them, but I am crash to another
problem.
For socket modul example python report:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\listen2.py", line 5, in
<module>
    port.bind(('', 3883))
  File "<string>", line 1, in bind
error: (10048, 'Address already in use')


and for twisted example pythod report:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\listen2twisted.py",
line 8, in -toplevel-
    class PrintingProtocol(Protocol):
  File "C:\Documents and Settings\poupa\Plocha\listen2twisted.py",
line 28, in PrintingProtocol
    print repr("".join(self.received))
NameError: name 'self' is not defined

How can I solve this errors?
(for twisted I instal zope for python, pywin32 and twisted. all for
python 2.4)






From deets at nospam.web.de  Wed May 28 11:15:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 17:15:07 +0200
Subject: pydb remote debugging/cmd.Cmd over socket?
Message-ID: <6a5b8qF35n4hiU1@mid.uni-berlin.de>

Hi,

I'm fiddling around with pydb. Installation and usage are fine. What I
especially like is the fact that you can attach a signal such that you drop
into debugging mode on demand.

But this is of limited use to me in situations where a server is written in
python. According to the source, pydb's debugger class Gdb extends cmd.Cmd.

It passes stdin/stdout-arguments that should be usable to replace the
standard streams. But so far all my experiments simply dropped the process
into debugging mode putting out and getting io over stdin/stdout - not my
self-supplied streams.

So I wonder (being a bit rusty on my UNIX-piping-skillz): how does one do
that - essentially, create a remote python shell using cmd.Cmd? 

Diez


From dave.g1234 at gmail.com  Tue May 20 16:39:20 2008
From: dave.g1234 at gmail.com (dave)
Date: Tue, 20 May 2008 13:39:20 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com> 
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com> 
	<7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com> 
	<m2zlqp75xs.fsf@googlemail.com>
Message-ID: <51ebd8fa-3719-46ae-99b2-1a46ff847a8c@w5g2000prd.googlegroups.com>

On May 17, 12:20 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> dave.g1... at gmail.com writes:
> > On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
> > <bruno.desthuilli... at gmail.com> wrote:
> >> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>
> >> > Thanks for the responses.  I'm well aware that the function can be
> >> > passed in the parameters, passing in the functino as an arg defeats
> >> > the purpose of what I'm going after.
>
> >> Why so ?
> >> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> >> > but a perfunctory glance looks like we're doing the close to the same
> >> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> >> > can pass in other parameters to foo.
>
> >> I may be wrong (if so please pardon my lack of intelligence and/or
> >> provide a couple use case), but it looks like you're trying to
> >> reinvent partial application.
>
> >> from functools import partial
> >> def foo(x, y):
> >>   return x + y
>
> >> pfoo = partial(foo, 2)
> >> print pfoo(42)
>
> >> Don't know if this helps...
>
> > Ok, so that solves the issue of the aforementioned compose function.
> > We could do compose( partialfoo,....) ) etc (although I might say I
> > prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
> > provide wrapper around an object that lets you call abritrary
> > functions on that object with it as a parameter - i.e., as if it were
> > a method in a class.  The partial function was only a component of the
> > code I posted earlier. Or am I missing something you're saying?
>
> Ok so you want to do
>
>     wrap(x).foo(42).bar('spam')...
>
> What is the advantage over
>
>     foo(x, 42)
>     bar(x, 'spam')
>     ...
>
> ?
>
> --
> Arnaud



*shrug*, just syntactic preference I guess.  In jquery, for example,
you are working over sets of DOM elements and it's convenient to chain
those statements into a single line of x.foo().bar().biz() etc.  IMO
it's a little cleaner to do that as an 'atomic' line, but it's  not
really that different.  Ideally the classes you are using would
support this without 'wrap' but I was just tinkering with a hack to do
it that way.

Thanks for the help

dave


From upton at virginia.edu  Mon May 26 15:49:33 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 15:49:33 -0400
Subject: definition of a highlevel language?
In-Reply-To: <45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805261249r7eafa4d0k15e068e8cae9b60f@mail.gmail.com>

On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:
> On May 26, 3:02 pm, notnorweg... at yahoo.se wrote:
>
>> what is crazy about it?
>
> To make, say, a Python machine fast, you'd have to optimize the hell
> out of the architecture, probably all the way down to the microcode
> level.  Thus, a hypothetical hardware-based Python machine would look
> very little like other, more conventional chips like x86 or ARM, for
> instance.  In fact, I suspect it'd look a lot like the CPython virtual
> machine on an instruction level.

I don't know if it would necessarily look like the CPython VM, except
for the decode stage (this being said without any knowledge of the
CPython implementation, but with more than I ever thought I'd know
about processor architecture/microarchitecture)--I guess it depends on
if you'd have to treat Python bytecode instructions as CISC and then
would want to convert them to micro-ops to execute.  I don't know
about the LISP machine, but I know that many if not all of the
attempted implementations of Java machines really just ran Java
bytecode as its native instruction set.  (I assume they did some
optimizations though to actually use registers rather than treating it
as a stack machine, or maybe they just had a register stack.)

The point about them looking very little like x86/ARM/etc chips is the
important part though--IIRC, part of the failure of Java machines was
lousy support for preexisting code, due to the optimizations for Java
bytecode, and I expect the same would be true of a Python
bytecode-optimized processor.


From pavlovevidence at gmail.com  Wed May  7 13:09:43 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 10:09:43 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com> 
	<15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com> 
	<7x8wyma6w8.fsf@ruckus.brouhaha.com>
Message-ID: <1997187c-0347-4aca-a7eb-c884f37df73c@s50g2000hsb.googlegroups.com>

On May 7, 3:51 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > Nonsense.  They could be more than willing to contribute their
> > patches, but aren't willing to accept the GPL's limitation to being
> > used only in open source packages.
>
> Oh, I see what you mean--I'm considering any derived work to be a
> patch, which is maybe an overbroad use of that term.  If they are
> willing to contribute their patches in that sense, the GPL shouldn't
> be a problem.  If they want to just send back small scraps of
> improvement while incorporating the GPL'd program into a closed
> program, the GPL is doing its job if it prevents that.

I think what I said is applicable to derived works, if the idea is to
derive another non-open-source work in turn.

I.e., someone might be motived to create a derived work of some code
with the expectation of using it in their non-open-source project, but
if it's GPLed they can't do that, so they probably wouldn't bother.


Carl Banks


From bearophileHUGS at lycos.com  Tue May 20 09:05:04 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:05:04 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de>
Message-ID: <3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com>

Helmut Jarausch:
> I'd ask in comp.compression where the specialists are listening and who are
> very helpful.

Asking in comp.compression is a good starting point.

My suggestions (sorry if they look a bit unsorted): it depends on what
language you want to use, how much you want to compress the strings,
if they are ASCII or unicode, how much quickly you want to compress/
decompress them, and how much time you have to write the encoder/
decoder.

You can use Python or a C/D extension, if you use C you will need more
time to develop it, but you will be quite more free to use any
algorithm you want (well, you are free with Python too, but the code
may be slower if it performs low level things), so D may be an
acceptable compromise.

Generally it's better to start with the simplest solution, and go on
from there looking for more complex ones if the first one isn't
enough. In Python the simplest thing to try is to compress the strings
with zip:
"George Washington".encode("zip")
Probably the result is longer than the original (25 bytes output for
this string). With "bz2" the results are probably worse (56 bytes for
this string).

A possible alternative it to compress many (10-30) strings at a time,
using an external table of their starting points (you can put the
table at the beginning), or you can separate those strings with a
separator char that's never present in the strings; and then you can
zip that group. If you have 1 million strings you can divide them into
such little groups, but the indexing in the DB becomes complex, and I
don't like this solution much.

A bit less simple python solution is to keep a fixed corpus of text
and compress it with and without the little string you want to add
(like you say), but compressing/decompressing everything each time (if
the corpus is small enough this isn't that slow), for example:

>>> s2 = a 2488 bytes long text
>>> len(s2)
2488
>>> z1 = (s2).encode("zip")
>>> len(z1)
1321
>>> s = 'George Washington'
>>> len((s).encode("zip"))
25
>>> len(s.encode("bz2"))
56
>>> z2 = (s2+s).encode("zip")
>>> len(z2)
1332
>>> len(z2) - len(z1)
11

So you need to store only this 11 byte long string to be able to
decompress it. A bigger corpus (s2) allows you a bit more compression,
but it requires more time for compression/decompression:

>>> len(s3) # s3 is a longer English text
10811
>>> z3 = s3.encode("zip")
>>> len(z3)
4971
>>> z4 = (s3+s).encode("zip")
>>> len(z4)
4980
>>> len(z4) - len(z3)
9

One of the simpler ways to compress short ASCII English texts is to
see that the most frequent chars are very few, so you can encode the
15 most common English chars with 1 nibble, and the other ones with 3
nibbles (first nibble is an escape, and the two following are the
whole byte), if you use a low level language you can encode this with
few lines of code, it's very fast and it may shave off 25-33% of your
bytes. It means that your "George Washington" (17 chars long) may
become about 12-13 chars long. I have implemented this with Python
too, it's easy.

Another possible solution is to use a Huffman compression with fixed
symbol frequencies. In Python there are ways to write such compressor/
decompressor in just 10-15 lines code. You can use the heapq to speed
up the processing. This may lead to more compression, but I presume
not much than less than 4-5 bpc. But if you want to compress/
decompress a LOT of strings you may need to write (or look for the
code) in C/D.

This is one implementation that doesn't use heapq yet:

from operator import itemgetter



def clean_tree(obj):

    if isinstance(obj, tuple):

        return obj[0]

    else:

        return [clean_tree(obj[0][0]), clean_tree(obj[0][1])]



def huffman_generate(freqsl):

    while len(freqsl) > 2:

        freqsl.sort(key=itemgetter(1))

        freqsl = [ [freqsl[0:2], freqsl[0][1] + freqsl[1][1]] ] +
freqsl[2:]

    return [freqsl, -1]



def tree2dict(tree):

    def encode(tree, out=""):

        if isinstance(tree, list):

            encode(tree[0], out+"0")

            encode(tree[1], out+"1")

        else:

            dic[tree[0]] = out

        return dic

    dic = {}

    return encode(tree)



freqs = [('a', 45), ('b', 13), ('c', 12), ('d', 16), ('e', 9), ('f',
5)]

print tree2dict(clean_tree(huffman_generate(freqs)))

If you want to use a Huffman you can use the usual tricks to increase
compression: use 2-char symbols, or even use whole words as symbols
(but you can use whole words only if you are sure your language is
English with few strange words).

If you want more compression, like a 6 bytes (2.8 bpc) output you will
need more complex algorithms. On long English texts the best
compressors need less than 0.9 bpc, but they are surely useless for
you. I don't think you will be able to go down to 6 bytes for that
string, unless you are ready to pay lot of computational time :-)

Bye,
bearophile


From inhahe at gmail.com  Tue May 20 23:07:03 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 23:07:03 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
	<0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>
Message-ID: <XkMYj.13011$Xv3.1374@bignews4.bellsouth.net>

oh yeah!  thanks for pointing it out, i should have thought of that, i 
*just* read about it today, or was it yesterday.

so what's the problem with pickle?  i have a feeling, maybe i read it, that 
when you pickle a derived class it pickles it as a member of the base class, 
is that it?

i don't know how i would get around the problem, though, because i'd have to 
know how to access the deque object that my class stores when i do 
deque.__init__ in my constructor, so that i could pickle it and my class 
variables separately.




"Larry Bates" <larry.bates at websafe.com`> wrote in message 
news:0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d at comcast.com...
> inhahe wrote:
>>   def __init__(self, filename, initial):
>>
>> should be
>>
>>   def __init__(self, filename, initial=[]):
>>
>> (that was the whole reason i put the filename first.)
>>
>> sorry.
>>
>>
>>
> Defaulting initial to empty list this way is asking for trouble.  You 
> should
> default it to None and check for None and reset to empty list.
>
> -Larry 




From nagle at animats.com  Sun May 25 03:41:02 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 25 May 2008 00:41:02 -0700
Subject: webspider getting stuck
In-Reply-To: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>
References: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>
Message-ID: <483914b3$0$34506$742ec2ed@news.sonic.net>

notnorwegian at yahoo.se wrote:
> i am writing a simple webspider .
> 
> how do i avoid getting stuck at something like this:
> Enter username for W3CACL at www.w3.org:
> 
> ?


   It's a silly feature of urllib.  See

http://docs.python.org/lib/module-urllib.html

where it says:

"Note: When performing basic authentication, a FancyURLopener instance calls its 
prompt_user_passwd() method. The default implementation asks the users for the 
required information on the controlling terminal. A subclass may override this 
method to support more appropriate behavior if needed."

Yes, the default behavior when faced with a site that wants authentication
is to to ask for a user name and password on standard input.  This is
seldom what you want.

So subclass and overrride.

					John Nagle


From exarkun at divmod.com  Mon May  5 10:16:51 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 10:16:51 -0400
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>
Message-ID: <20080505141651.6859.554247783.divmod.quotient.59048@ohm>

On Mon, 5 May 2008 16:05:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>On Mon, May 5, 2008 at 3:48 PM, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>> On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>>
>> > Hi!
>> >
>> > I have a C module for which I created a wrapper with swig. The function
>> def is:
>> >
>> > C:
>> >
>> > int some_thing(unsigned char * the_str);
>> >
>> > eg:
>> >
>> > Python:
>> >
>> > some_module.some_thing (the_str)
>> >
>> > Now I would like to feed it with a UTF-8 formatted string:
>> >
>> > test = u'Make \u0633\u0644\u0627\u0645, not war.'
>> >
>>
>>  `test? is not a UTF-8 encoded string.  It's a unicode string.
>>
>>  To get a UTF-8 encoded string from a unicode string, use the `encode?
>>  method:
>>
>>    some_module.some_thing(test.encode('utf-8'))
>
>Yes you are correct. It is unicode string. But still if I use encode I
>get the same error:
>
>TypeError with message: in method 'some_thing', argument 1 of type
>'unsigned char *'
>
>So I am looking for a way to "cast" unicode string to unsigned char *.
>

You need to provide some more information about `some_module.some_thing?.
How is it implemented?  What Python type does it expect?  If it doesn't
take a unicode string and it doesn't take a byte string, I don't know
what kind of string it does take.

Jean-Paul


From qgallet at gmail.com  Fri May 23 11:15:02 2008
From: qgallet at gmail.com (Quentin Gallet-Gilles)
Date: Fri, 23 May 2008 17:15:02 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <8b943f2b0805230815l3f9963bav69c7d589a01cd386@mail.gmail.com>

I personally don't see any benefit in this approach. By definition,
unittests should be independent, so the order argument suggests a deeper
issue.  What's your use case ?

Quentin

On Fri, May 23, 2008 at 11:36 AM, Antoon Pardon <apardon at forel.vub.ac.be>
wrote:

> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?
>
> *** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
> --- unittest.py 2008-05-23 11:19:57.000000000 +0200
> ***************
> *** 570,575 ****
> --- 570,577 ----
>          """
>          def isTestMethod(attrname, testCaseClass=testCaseClass,
> prefix=self.testMethodPrefix):
>              return attrname.startswith(prefix) and
> callable(getattr(testCaseClass, attrname))
> +         def getlinenr(name):
> +             return getattr(testCaseClass,
> name).im_func.func_code.co_firstlineno
>          testFnNames = filter(isTestMethod, dir(testCaseClass))
>          for baseclass in testCaseClass.__bases__:
>              for testFnName in self.getTestCaseNames(baseclass):
> ***************
> *** 577,582 ****
> --- 579,586 ----
>                      testFnNames.append(testFnName)
>          if self.sortTestMethodsUsing:
>              testFnNames.sort(self.sortTestMethodsUsing)
> +         else:
> +             testFnNames.sort(key=getlinenr)
>          return testFnNames
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From wojtek.gminick.walczak at gmail.com  Tue May  6 02:46:07 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 08:46:07 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>
References: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>
	<2c3c21060805052332r6261d8cbt59817603a2d37e00@mail.gmail.com>
Message-ID: <2c3c21060805052346x23752828x8d587b7bacf3303d@mail.gmail.com>

2008/5/6, Wojciech Walczak <wojtek.gminick.walczak at gmail.com>:
>  a > 99999.0 returns True because NotImplemented > 99999.0 returns True.
>  a < 99999.0 returns False because NotImplemented < 99999.0 returns False.

Sorry, it should rather be:

Decimal('0.5') > 9.0 returns True because:
Decimal('0.5') > NotImplemented returns True

and:

Decimal('0.5') < 9.0 returns False because:
Decimal('0.5') < NotImplemented returns False

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From BrianVanderburg2 at aim.com  Thu May  1 08:24:01 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 01 May 2008 08:24:01 -0400
Subject: Signals/Slots support in Python
Message-ID: <4819B661.7080103@aim.com>

I don't know if any such support is already built in, so I ended up 
making my own simple signals/slots like mechanism.  If anyone is 
interested then here it is, along with a simple test.  It can connect to 
normal functions as well as instance methods.  It also supports weak 
connections where when an object is gone, the slot is gone as well, the 
slot just holds a weak reference to the object.

Brian Vanderburg II


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From waldemar.osuch at gmail.com  Wed May  7 04:12:04 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Wed, 07 May 2008 08:12:04 GMT
Subject: Problem parsing SOAP envelope with ElementTree
In-Reply-To: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
References: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
Message-ID: <ovdUj.119321$rd2.85572@pd7urf3no>

Zvi wrote:
> Hi All,
> 
>    Can someone tell me why id the following not working?

snip not working code

> 
> What am I doing wrong?

Here is working code.

8<-----------------------------
from xml.etree import ElementTree as ET

data = """<soap:Envelope 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<Get2Response xmlns="http://tempuri.org/">
<Get2Result><![CDATA[<?xml version='1.0' encoding='UTF-8'?>
<Response>
<Entity Name='Accounts' Current='00300571B42F1DEC8E9B6CDF19A59950'>
<Instance Id='00300571B42F1DEC8E9B6CDF19A59950'>
<Field Name='Status' Value='2'/>
<Field Name='Id' Value='MC4670'/>
<Field Name='Name' Value='ACDC Industries Inc'/>
<Field Name='City' Value='Milwaukee'/>
<Field Name='MainContact' Value=''/>
<Field Name='CreatedOn' Value='20070723051316.0000000 '/>
</Instance>
</Entity>
</Response>]]>
</Get2Result>
</Get2Response>
</soap:Body>
</soap:Envelope>"""

env = ET.fromstring(data)
result = env.find('*//{http://tempuri.org/}Get2Result')
response = ET.fromstring(result.text)
for elm in response.getiterator():
     print elm
8<-----------------------------------------

In the future please paste complete examples. It helps me to help you.
They were two things that I found to be wrong:
- searching using wrong path. You missed *// in front of the tag
- parsing only once. There are two xml sources here.
   The first parse got you the representation of the Envelope.
   You have to parse the Get2Result payload to get at the
   interesting part

Waldemar


From miller.paul.w at gmail.com  Tue May 13 23:32:40 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 20:32:40 -0700 (PDT)
Subject: Python isn't English -- and that's a good thing!
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
	<919416e2-590d-48ad-9d75-80a1a4c04732@b1g2000hsg.googlegroups.com>
Message-ID: <6552cdf2-5a9e-4081-affa-6e43506ae8d7@34g2000hsh.googlegroups.com>

On May 13, 6:14 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 13, 6:32 pm, "D'Arcy J.M. Cain" <da... at druid.net> wrote:

> I once had to do a bit of scripting in AppleScript. The problem I
> found was that AppleScript tries to be so much like natural English
> that I never got a clear idea of whether something would be valid!

You have a great point here.

I recently read a blog posting that noted the same thing about Inform
7 (a specialized language used to write interactive fiction games) and
its English-like syntax.  I've read completed games in Inform 7, and
they're very easy to understand, indeed.  It does tend to read like
English, though somewhat stilted/formal/artificial.

Writing it, on the other hand (at least according to to said blog
post), is a bit more difficult.  Because the syntax is *so* English-
like, one tends to want to write things that would be natural in
English.  However, because the compiler doesn't actually understand
natural English, this frequently doesn't work.

Python, OTOH, definitely *doesn't* have this sort of impedance
mismatch for me.  Python code looks like *code*, to be sure, but the
language allows you to forget about most of the nitty-gritty details
and just get stuff done.  That's what I like about it -- *not* that
it's "English-like," in any way.


From gagsl-py2 at yahoo.com.ar  Tue May 20 19:13:49 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 20:13:49 -0300
Subject: Embedding Python question.
References: <g0u60r$qo0$1@aioe.org>
Message-ID: <op.ubg6tbggx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 06:35:23 -0300, Thomas Troeger  
<thomas.troeger.ext at siemens.com> escribi?:

> I've successfully embedded the Python interpreter into a set of C/C++  
> application programs that use a larger library project with information  
> from http://docs.python.org/api/api.html and  
> http://docs.python.org/ext/ext.html. Now I want to wrap classes and  
> functions from the associated libraries so that I can write new  
> applications completely in Python, but I'm not entirely sure how to  
> start because I have some problems understanding which is the best way.  
> It would be nice if someone could answer the following questions and  
> clarify this matter:
>
> - until now I've used the approach as documented in  
> http://docs.python.org/ext/extending-with-embedding.html to extend the  
> embedded interpreter and that works pretty well. I'd like to use a  
> similar approach for other C applications. Can I write a C library that  
> implements this technique and link it into all C applications that need  
> Python support, or is there a better, more elegant way?

(I don't get what you mean by "this technique" and how would you write a  
library)

> - in the documentation, there's an example that illustrates the creation  
> of a python module for pure extending of a python script (the Noddy  
> stuff). Do I have to make a separate module for each library I want to  
> wrap? If yes, how can I manage the case where two libraries can access  
> each other?

Normally, yes, you'd write a wrapping module for each library. If both  
access each other - well, you'd manage it the same way as you would do it  
in C; you're just providing an interfase for calling the functions from  
Python. (Hmm, maybe I have an "imagination crisis" today?)

> - if I write an extension module, how can I handle the case where the C  
> wrapper methods want to call back into the same Python interpreter  
> instance?

I think there is no problem - unless your program is multithreaded, then  
you should not release the GIL when calling into your extension if there  
is a chance the C code may call Python code.


-- 
Gabriel Genellina



From arnodel at googlemail.com  Tue May  6 11:44:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:44:06 +0100
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
	<4dbd4d59-c4e5-4910-bcfd-7e0b2b3bbcef@59g2000hsb.googlegroups.com>
Message-ID: <m2zlr35tfd.fsf@googlemail.com>

cokofreedom at gmail.com writes:
[...]
> Python is built to be easy to read,

And also very easy to *write*.  I rarely hear this, but it is the main
reason why I like Python so much.  I can't really explain why though.

[...]

(cokofreedom, I found your explanation of the virtues of Python was
excellent!)

-- 
Arnaud


From Graham.Dumpleton at gmail.com  Tue May 13 21:18:34 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Tue, 13 May 2008 18:18:34 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
	<3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com>
Message-ID: <c610ba4f-a832-451a-a997-1fb02a818e08@n1g2000prb.googlegroups.com>

On May 14, 10:58?am, Rick Dooling <rpdool... at gmail.com> wrote:
> On May 13, 7:29 pm, Con <conra... at gmail.com> wrote:
>
> > Hi, how does properly install the Python MySQL db module for Mac OS
> > X? ?I was only able to locate the Win32 modules.
>
> > Thanks in advance,
>
> > -Conrad
>
> I tried this a couple of weeks ago using macports and had problems.
>
> See, for example:
>
> http://www.davidcramer.net/code/57/mysqldb-on-leopard.html
>
> I read about several people who went in and edited the source files to
> work out the bugs on Leopard, but instead I just changed my Python
> code to use SQLite for the moment until someone fixes MySQLdb. There's
> a nice Perl script that will convert your MySQL db to an SQLite db if
> you're interested.
>
> RD

Because Python executable on Leopard has been stripped of 64 bit
architectures and thus runs as a 32 bit process, the 64 bit problems
only come up when trying to use the MySQLdb module under mod_wsgi or
mod_python with Apache (presuming you got mod_python to build as 64
bit).

If you are really stuck and can't get MySQLdb module to build as 64
bit capable, then you can force Apache to run as a 32 bit process and
avoid the problems.

For more details, see section 'Thinning The Apache Executable' of:

  http://code.google.com/p/modwsgi/wiki/InstallationOnMacOSX

Also see contributed comments to the page, which explains a way of
making Apache run as 32 bit by changing plist files rather than
thinning the Apache executable.

Graham


From bronger at physik.rwth-aachen.de  Thu May  1 13:58:12 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 19:58:12 +0200
Subject: Problems with Cheese Shop
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
	<mailman.423.1209664545.12834.python-list@python.org>
Message-ID: <87ve1xvrd7.fsf@physik.rwth-aachen.de>

Hall?chen!

Christian Heimes writes:

> Torsten Bronger schrieb:
>
>> How can I authorise to the Python Cheese Shop in order to use
>> setup.py upload?  Currently, I get
>> 
>> Upload failed (401): You must be identified to edit package
>> information
>
> Try "python setup.py register sdist upload"

I forgot to say that the package itself is already there, just not
the current release.  Is "register" still the way to go?

Thank you!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From mmanns at gmx.net  Sun May 18 16:31:55 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 18 May 2008 22:31:55 +0200
Subject: distutils directory problem
Message-ID: <g0q3nr$iah$1@aioe.org>

Hi,

I have the following problem with the distutils package:
(I have now spent hours reading and searching the manuals and tutorials,
and I am still stuck.)

I have a working directory
~/pyspread
in which my libraries are situated and two icons directories
~/pyspread/icons and ~/pyspread/icons/actions

Now I would like to create a setup.py file inside my ~/pyspread
directory that installs my .py modules in .../site-packages/pyspread
and the icons in appropriate sub-folders and adds pyspread.pth to
.../site-packages so that .../site-packages/pyspread is in the
PYTHONPATH.

However, my setup.py puts everything  (including .pyc files) into
site-packages *and* into the sub-folders. What am I doing wrong?

I am looking for a platform-independent solution. Currently, I am using
python 2.5 on Linux.

Here my setup.py

#!/usr/bin/env python

from distutils.core import setup
setup(name='pyspread',
      version='0.0.7',
      description='A spreadsheet that accepts a pure python expression in each cell.',
      license='GPL v3 :: GNU General Public License',
      classifiers=[ 'Development Status :: 3 - Alpha',
                    'Intended Audience :: End Users/Desktop',
      ],
      author='Martin Manns',
      author_email='mmanns at gmx.net',
      url='http://sourceforge.net/projects/pyspread/',
      packages=['pyspread'],
      package_dir={'pyspread': '.'},
      scripts=['pyspread.py'],
      py_modules=['pyspread.mainapp', 'pyspread.pysgrid', 'pyspread.mygrid','pyspread.icontheme'],
      package_data={'pyspread': ['icons/*.png', 'icons/actions/*.png' ,\
                                 'test.pys', 'test.csv', 'test2.csv', \
                                 'README', 'COPYING']},
)


Thanks in advance

Martin




From sjmachin at lexicon.net  Sat May 24 19:53:39 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 23:53:39 GMT
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in python coding?
In-Reply-To: <g1a5ti$7gm$00$1@news.t-online.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
Message-ID: <4838aa79$1@news.mel.dft.com.au>

Sebastian 'lunar' Wiesner wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> [ zxo102 <zxo102 at gmail.com> ]
> 
>>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
>> "\xED\x6F\x3C\x01" in python coding?
>> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
>> the error information : invalid \x escape.
> 
> [1]--> 'ED6F3C01'.decode('hex')
> Out[1]: '\xedo<\x01'
> 

FWIW the 'hex' codec is just a big fat Python-coded wrapper around the 
routines in the C-coded binascii module; here's the evidence:

 >>> '123'.decode('hex')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "c:\python25\lib\encodings\hex_codec.py", line 42, in hex_decode
     output = binascii.a2b_hex(input)
TypeError: Odd-length string


From alan.wright at volubill.com  Mon May 19 18:50:50 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 23:50:50 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<mailman.1364.1211234091.12834.python-list@python.org>
Message-ID: <D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>

Ghirai,
Scapy does the same, only it sends RST and not FIN, so still no help

 send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))

Only have windows at the moment sadly.

Alan

"Ghirai" <ghirai at ghirai.com> wrote in message 
news:mailman.1364.1211234091.12834.python-list at python.org...
> On Mon, 19 May 2008 20:25:57 +0100
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks for the feedback.
>>
>> Using the socket in a list is great
>>
>> However, as i imagined, I now get a limit of around 1500 conns before
>> the system crashes out, also i have noticed, that the ports loop back
>> to 1025 when they hit 5000.
>>
>> Any ideas on how to make the list/socket get to around 50K
>>
>> TIA
>>
>
> Try to use scapy to send raw empty packets with S flag set.
> Also use Linux/BSD if you're trying this on Windows.
>
> -- 
> Regards,
> Ghirai. 




From pavlovevidence at gmail.com  Sat May 24 07:05:29 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 24 May 2008 04:05:29 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com> 
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <569506e1-b5b2-45f3-9888-5f207284493f@w7g2000hsa.googlegroups.com>

On May 24, 1:56 am, cm_gui <cmg... at gmail.com> wrote:
> i'm not trying to 'troll' here.

Maybe you're not trying, but you're succeeding.

If you want to criticize be constructive about it, otherwise get out.


Carl Banks


From geonomica at gmail.com  Tue May 13 18:35:01 2008
From: geonomica at gmail.com (gianluca)
Date: Tue, 13 May 2008 15:35:01 -0700 (PDT)
Subject: python/swig
Message-ID: <186486b1-c3ef-4bbd-9742-bcaed67138b7@k13g2000hse.googlegroups.com>

Hy,
I need help indeed, about python/swig C  wrapper. Exactly, I've built
a python library from C library and it seem works. Unfortunatly, a
gruop of function that requred pointer to pointer parmeters give  me a
exception like this:
"TypeError: in method 'BestRules', argument 1 of type 'value_type **'"
I've tryed to use cpointer.i to obtain a pointer to use in function
but this don't work.
Could you help me?
thanks in advace.

Gianluca Massei

PS. this is my interface.i file:
"
%module pyRSL
%include "cpointer.i"

%{
#include "rough.h"
#include "raccess.h"
#include "rbasic.h"
#include "rclass.h"
#include "rcore.h"
#include "reduct1.h"
#include "reduct2.h"
#include "rerror.h"
#include "rset.h"
#include "rsystem.h"
#include "rule1.h"
#include "rule2.h"
%}

%include "rough.h"
%include "raccess.h"
%include "rbasic.h"
%include "rclass.h"
%include "rcore.h"
%include "reduct1.h"
%include "reduct2.h"
%include "rerror.h"
%include "rset.h"
%include "rsystem.h"
%include "rule1.h"
%include "rule2.h"
"


From p.wallstedt at gmail.com  Mon May 26 17:54:19 2008
From: p.wallstedt at gmail.com (Peter)
Date: Mon, 26 May 2008 14:54:19 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
	<8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>
Message-ID: <d7f00113-f881-480f-9051-b688b1e60c84@m36g2000hse.googlegroups.com>

On 23 Maj, 16:13, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-23, Peter <p.wallst... at gmail.com> wrote:
>
>
>
> > On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> >> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> >> > I have a small but rather annoying problem withpyserial. I want to
> >> > open a file on disk for reading and then open a com-port, write lines
> >> > from the file to the port and then read something back and compare it
> >> > to the next line in the file. Should be simple. And it is, apart from
> >> > the fact that the file seems to be doubled ...? Or it loops through
> >> > the file twice.
>
> >> > If I exclude the "import serial" it works.
>
> >> > Any ideas?
>
> >> Your problem is in line 117 of your program.
>
> > Do you have to much time?
>
> "Do you have a sense of irony?" he asked, already knowing the answer.
>
> --
> Grant

Grant - "Do you have a sence of appropriateness"? he asked, already
knowing the answer. I had no idea this is a comedy club. I might argue
that my reply was also some sort of humor, but you clearly didn't see
it that way. Maybe you should try living according to the rules you
make for others?

Diez - Did you mean the section which covers Asperger's Syndrome?

I'm just being a hacker here guys ... according to the guidelines.

It's amazing how such a simple question gets derailed immediately.
Without any light on the subject   whatsoever.




From benjamin.kaplan at case.edu  Thu May  8 12:34:50 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 8 May 2008 12:34:50 -0400
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <ec96e1390805080934i71d8d049y22f272c417866c39@mail.gmail.com>

On Thu, May 8, 2008 at 6:25 AM, Raxit at MyKavita.com <raxitsheth2000 at gmail.com>
wrote:

> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
>
> what can i do easily with python which is not easy in c++/java !?
>

Python compared to C++:
You don't have to worry about memory management, which means you don't get
core dumps and destroy your computer.

Python compared to Java:
You don't have the strictly enforced type checking and object-oriented
programming, which is sometimes not needed. Also, Java was meant to be blind
to the platform, so you will have trouble accessing anything outside your
program. Python has the os, shutil, and subprocess modules that let you run
command line programs and scripts, and you can directly access the win32 API
if you are only programming for Windows. Also, Java requires the JVM to run.
With python, you can run the program through the regular python interpreter,
on the JVM (Jython), natively in Windows (IronPython or freeze it with
py2exe), and just about anywhere else you want, so people who use your
software won't have to install Python themselves.

>
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Fri May  9 04:40:15 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 08:40:15 GMT
Subject: "prove"
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <Xns9A996257DA16Dduncanbooth@127.0.0.1>

"Lucas Prado Melo" <lucaspm at dcc.ufba.br> wrote:

> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)


Language reference, mostly section 5.3 Primaries

call ::= 
             primary "(" [argument_list [","]
                            | expression genexpr_for] ")"

primary ::= 
             atom | attributeref
              | subscription | slicing | call

attributeref ::= 
             primary "." identifier

atom ::= 
             identifier | literal | enclosure


That shows fairly well how the classname.functioname bit works (it is an 
attributeref which is a primary which forms the first part of a call), 
but you'll have to wade through a fair bit of the grammar to show that 
argument_list can be an identifier.


argument_list ::= 
             positional_arguments ["," keyword_arguments]
                                     ["," "*" expression]
                                     ["," "**" expression]
                | keyword_arguments ["," "*" expression]
                                    ["," "**" expression]
                | "*" expression ["," "**" expression]
                | "**" expression

positional_arguments ::= 
             expression ("," expression)*

... and so on ...


From andre.roberge at gmail.com  Sat May 31 21:24:35 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Sat, 31 May 2008 18:24:35 -0700 (PDT)
Subject: disappearing interpreter
References: <a273de89-2f33-4e13-8ca4-0dd1674b1fc7@w4g2000prd.googlegroups.com>
Message-ID: <8ae1d4e2-3166-49b3-addb-b5b352c09558@2g2000hsn.googlegroups.com>

On May 31, 8:59 pm, oregon skip <skipjack... at clearwire.net> wrote:
> I am a new Python programmer, using Windows XP, IDLE and the
> interpreter. Everything is
> OK except that when I double check a name.py file it runs on the
> interpreter, but the
> window disappears before I can see what happened. Any suggestions?

This is because the entire program runs ... and ends quickly.

Try to add the following line:

raw_input("Done.  Press the enter key to quit.")

Andr?


From anton.hartl at gmail.com  Tue May 20 18:19:26 2008
From: anton.hartl at gmail.com (Anton Hartl)
Date: Tue, 20 May 2008 22:19:26 +0000 (UTC)
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
Message-ID: <slrng36jj3.1g63.ah@hugin.c0defeed.de>

On 2008-05-20, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Salvatore DI DI0 schrieb:
>> Hello,
>> 
>> The Processing Graphics language has been implemented in Javascript.
>
> No, it hasn't. Processing is written in Java.

Yes, it really has been implemented in Javascript:

    http://ejohn.org/blog/processingjs/

-Anton


From straton at lampsacos.demon.co.uk  Sun May 18 11:08:49 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 16:08:49 +0100
Subject: Write bits in file
In-Reply-To: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <g0pgq5$68d$1$8300dec7@news.demon.co.uk>

I admit that I was mostly just interested in getting your
question clarified, rather than having any great experise.

But a bit of Googling took me to the 'Bit vector' module,
[I googled: 'python ("bit array" OR "bit vector")']
which might be what you are after. I have no experience
with it, myself:

http://cobweb.ecn.purdue.edu/~kak/dist/BitVector-1.4.1.html

Monica Leko wrote:
> On May 18, 2:20 pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
> 
> Yes.
> 
>> is the 10-bit
>> bit-pattern to be stored at an arbitrary bit-position in
>> the file
> 
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.
> 
> 


From yves at zioup.com  Fri May  9 11:08:51 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 15:08:51 GMT
Subject: python newbie: some surprises
In-Reply-To: <mailman.844.1210314193.12834.python-list@python.org>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>	<VHQUj.124646$Cj7.90968@pd7urf2no>
	<mailman.844.1210314193.12834.python-list@python.org>
Message-ID: <7OZUj.125622$rd2.29080@pd7urf3no>

Gabriel Genellina wrote:

>> I see the point of the OP. Couldn't the new-line be used as an 
>> equivalent of   ':', for example, do you find this difficult to read:
>>
>> if a == 3
>>    do_something()
>>
>>
>> if a == 3: do_something()
> 
> Yes, it could be done, there are no technical reasons to always force to 
> use ":". But AFAIK the main reasons to keep ":" are internal consistency 
> (an inner block always starts with ":"; incidentally, that's easier to 
> handle for editors) and legibility (the ":" stands for itself and has a 
> meaning)

Legibility ?
But one could make the same argument for curly brackets, and we seem to be 
doing fine without them !

I have become so used to the power of indenting in python that I keep 
forgetting the colon, and this is getting worse as I do more python, not 
better. Maybe I'll write myself a "pre-compiler" that add the colons where 
the compiler needs them :-)


Yves.
http://www.SollerS.ca



From hdante at gmail.com  Fri May 16 08:20:19 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 05:20:19 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
Message-ID: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>

On May 16, 7:16?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> ? Hi All,

 Hello, :-)

>
> I'm trying to write a multi threaded TPC server. I have used xmlrpc

 How exactly did you come to the conclusion that your server must be
multi threaded ?


> - I have to send larger amounts of data, the overhead of converting to
> XML and parsing XML back would be too much pain

 - What's the expected amount of data you have to transfer ?
 - What's the expected network bandwidth ?
 - What's the expected acceptable transfer time ?
 - How many users are expected to be transfering data at the same
time ?

> I have looked at various solutions including:
>
> - PyOrbit - too heavy weight
> - Pyro - uses pickle, I do not trust it

 Did you consider gzipping your XML (or YAML) packets ? Would the
transfer time be acceptable in this case ?

>
> BTW I do not care about the clients - they must trust the server side.

 Oh, he said he _doesn't care about the clients_ ! ;-)

> In contrast, the server should not receive anything from the clients
> that is dangerous. I would like to use something that is fast, and can
> only transfer data, not code. For this reason I think I cannot use the
> marshal module because it is able to marshal code objects. I think I'm
> going to implement my own "pickler" over xdrlib, that will only
> pack/unpack data, NOT code. (It would also have the advantage that
> others could write clients in different languages.)

 In general I would avoid that. Try to better estimate the speed
requirements, to see if you really need do to this.

>
> Before I start re-inventing the wheel:
>
> - Is there another (already existing) higher level framework that I can
> try? It should be safe and fast, that is the only restriction.

 There's "Twisted".
 http://twistedmatrix.com/projects/core/documentation/howto/servers.html

> - Do you think that it is a good idea to use xdrlib? I haven't seen
> projects using it directly. For me it is like the rotor module was - it

 It's probably the best way to send binary stuff over the network.
But, again, I would avoid doing so.

> was there but almost nobody used it. There might be a better lower level
> library which I don't know of.
>
> Thank you,
>
> ? ?Laszlo



From Scott.Daniels at Acm.Org  Tue May 20 00:12:45 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 19 May 2008 21:12:45 -0700
Subject: test mult vars to same value, how to shorten expr?
In-Reply-To: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <yuSdnTXTPuQt0K_VnZ2dnUVZ_oTinZ2d@pdx.net>

notnorwegian at yahoo.se wrote:
>  if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:
How about:

     if 5 == a == b == c == ... z:
         ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From grante at visi.com  Fri May  2 10:40:10 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:40:10 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <mu2dnYnNde1XuobVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> The specified command takes the form of a fully-qualified file
> path, and zero or one arguments to the program. That command
> is then executed by the kernel, and the Python program file is
> passed as input to the resulting process.

Just to clarify that a bit a little, the name of the file (as
it was given to the "exec" system call) containing the "shebang
line" is passed to the resulting process as a command-line
parameter.

>> Why is one preferred over the other one ?
>
> I've never clearly understood why people want to use "#! /usr/bin/env
> python", which is prone to finding a different Python from the one
> installed by the operating system. I'd be interested to see what
> responses are in favour of it, and what the reasoning is.
>
> One possible reason is that the programmer is attempting to allow for
> systems where Python has been installed, but not from an operating
> system package.

Exactly.  the "env" approach works as long as python is
installed somewhere on the PATH.  "#!/usr/bin/python" will fail
if python is installed in /usr/local/bin/python.

-- 
Grant



From __peter__ at web.de  Tue May 13 05:01:09 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 11:01:09 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
	<g0bl2e$ft9$00$2@news.t-online.com>
Message-ID: <g0blcj$ft9$00$3@news.t-online.com>

Peter Otten wrote:

> # use at your own risk
> import numpy
> 
> N = 10**4 # I get a MemoryError for a bigger exponent
> b = numpy.array(range(N))
> a = numpy.zeros((N, N)) + b
> a *= a.transpose()
> a[0,0] = (b*b).sum()
> print a

Sorry, this is nonsense. 



From mattheww at chiark.greenend.org.uk  Mon May 12 16:48:17 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 12 May 2008 21:48:17 +0100 (BST)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <Dqd*eTIcs@news.chiark.greenend.org.uk>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning 
> Python" each night. Does anyone see any value in learning Python when you 
> don't need to for school, work, or any other reason? I mean, sure, there's 
> value in learning anything at any time, but for something like a programming 
> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.

> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off, but for the most part I'm 
> wondering what people's thoughts are as far as simply learning it for the 
> sake of learning. Does it seem like a silly endeavor to most people? Did 
> anyone here learn a programming language when you didn't need to? If so, how 
> much and in what capacity did you use it after you learned it?

I can't tell from what you wrote whether you feel you won't have any
reason to do any programming, or whether you already know several other
programming languages and you feel you won't have any reason to use
Python in particular.

If it's the former, I don't think you need to worry. If you ever find
yourself doing a repetitive task using a computer, or find that you're
using a program which does nearly-but-not-quite what you want, there
are good chances that there'll be a way to write a program to help.

-M-



From paul at boddie.org.uk  Mon May 26 05:14:19 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 26 May 2008 02:14:19 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>

So much to respond to here, so let's get it over with in one post...

On May 25, 2:32 pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> > On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > From whom are you trying to hide your attributes?
>
> > I saw this "don't need it" pattern in discussions about the ternary
> > "if..else" expression and about "except/finally on the same block
> > level". Now Python has both.

Well, there was no need to exclude try...except...finally in the first
place - Guido doubted the semantics of such a thing until he saw it in
Java, apparently. This is arguably one of the few features that has
incurred little cost with its addition, in contrast to many other
changes made to Python these days. Which brings us to the ternary
expression - something which will presumably see unprecedented usage
by those who jump on every new piece of syntax and "wear it out" in
short order.

Interestingly, Python did have an "access" keyword at some point
(before 1.4, I believe), so it isn't as if no-one had thought about
this before.

[...]

> > > Who taught you that enforced restrictions on attribute access was a
> > > "basic principle" of OO?
>
> > Nearly every introduction to OOP? Please don't tell me that
> > encapsulation
> > does not mean "enforced restriction". If the language has no syntactic
> > support for encapsulation then it does not have encapsulation. Similar
> > argument applies to Java where programmers sometimes claim that Java
> > "has" properties because of setCrap/getCrap.

But is "enforced restriction" essential in OOP? Note that languages
like C++ provide such features in order to satisfy constraints which
are not directly relevant to Python.

[...]

On May 26, 6:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
>
> I've always considered the underscore conventions in Python an ugly
> hack in an otherwise elegant language. I often avoid them even when
> they technically belong just because I don't like the way they make my
> code look.

To be honest, I don't really like putting double underscores before
names just to make sure that instances of subclasses won't start
trashing attributes of a class I've written. (I actually don't care
about people accessing attributes directly from outside instances
because I've seen enough "if only they hadn't made that private/
protected, I could do my work" situations in languages like Java.)
Indeed, I experienced a situation only yesterday where I found that I
had been using an instance attribute defined in a superclass (which
was arguably designed for subclassing), but was the author really
expected to prefix everything with double underscores? Of course, by
not enforcing the private nature of attributes, Python does permit
things like mix-in classes very easily, however.

If anything, Python lacks convenient facilities (besides informal
documentation) for describing the instance attributes provided by the
code of a class and of superclasses. Of course, the dynamic
possibilities in Python makes trivial implementations of such
facilities difficult, but having access to such details would make
errors like those described above less likely. I imagine that pylint
probably helps out in this regard, too.

[...]

> I am also bothered a bit by the seeming inconsistency of the rules for
> the single underscore. When used at file scope, they make the variable
> or function invisible outside the module, but when used at class
> scope, the "underscored" variables or functions are still fully
> visible. For those who claim that the client should be left to decide
> what to use, why is the client prohibited from using underscored
> variables at file scope?

I don't remember why this is. I'll leave you to track down the
rationale for this particular behaviour. ;-)

> I may be full of beans here, but I would like to make a suggestion.
> Why not add a keyword such as "private," and let it be the equivalent
> of "protected" in C++? That would make member variables and functions
> visible in inherited classes. The encapsulation wouldn't be as
> airtight as "private" in C++, so clients could still get access if
> they really need it in a pinch, but they would know they are bending
> the rules slightly. I realize that single underscores do that already,
> but they are just unsightly.

If anything, I'd prefer having private attributes than some kind of
protected attributes which don't actually offer useful protection
(from accidental naming collisions).

Paul


From inhahe at gmail.com  Sun May 18 17:38:17 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 17:38:17 -0400
Subject: Compress a string
Message-ID: <Jk1Yj.144435$Er2.17735@bignews6.bellsouth.net>

I forgot a line that says, "lc = c"
i should really test my stuff.

"inhahe" <inhahe at gmail.com> wrote in message news:...
>i see lots of neat one-liner solutions but just for the sake of argument:
>
> def compress_str(str):
>     new_str = ""
>     lc = ""
>     for c in str:
>        if c != lc: new_str.append(c)
>     return new_str
>
>
> "Matt Porter" <mabbikeel at gmail.com> wrote in message 
> news:mailman.1315.1211133997.12834.python-list at python.org...
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"
>>
>> The code I have so far feels like it could be made clearer and more 
>> succinct, but a solution is currently escaping me.
>>
>>
>>
>>
>> Cheers
>> Matt
>> -- 
>> --
>>
>
> 




From hdante at gmail.com  Sat May 17 23:25:18 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Sat, 17 May 2008 20:25:18 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>

On May 17, 7:32?pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
>
> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
>
> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

 I guess that python is not a good language for that. Algorithms
implemented in plain python are many times slower than C ones
(hundreds ?). In practice, algorithms are written in C and wrapped in
python. I have near zero experience in operations research, but once I
looked for linear programming toolkits for python and IIRC, I only
could find a trivial wrapper for glpk (called pulp).

 My opinion: choose compiled or byte compiled languages. Choose the
language paradigm that best suit the algorithms.


From iainking at gmail.com  Thu May 15 04:31:17 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 15 May 2008 01:31:17 -0700 (PDT)
Subject: Rename field in Access DB
References: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>
	<mailman.1120.1210778987.12834.python-list@python.org>
Message-ID: <b6579c4c-5a94-45ed-8aab-a1134f3d9748@d77g2000hsb.googlegroups.com>

On May 14, 4:29 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> Iain King wrote:
> > I'm manipulating an MS Access db via ADODB with win32com.client.  I
> > want to rename a field within a table, but I don't know how to.  I
> > assume there is a line of SQL which will do it, but nothing I've tried
> > (from searching) has worked.
> > Basic code:
>
> > import win32com.client
> > connection = win32com.client.Dispatch(r'ADODB.Connection')
> > DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
> > connection.Open(DSN)
> > connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
> > doesn't work
> > connection.Close()
>
> <code>
> import os, sys
> from win32com.client.gencache import EnsureDispatch as Dispatch
>
> DATABASE_FILEPATH = r"c:\temp\test.mdb"
> CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
>   DATABASE_FILEPATH
>
> if os.path.exists (DATABASE_FILEPATH):
>    os.remove (DATABASE_FILEPATH)
>
> adox = Dispatch ("ADOX.Catalog")
> adox.Create (CONNECTION_STRING)
> adox = None
>
> db = Dispatch ('ADODB.Connection')
> db.Open (CONNECTION_STRING)
> try:
>   db.Execute ('CREATE TABLE dtest (id INT, data INT)')
>   db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')
>
>   try:
>     db.Execute ('SELECT id, newdata FROM dtest')
>   except:
>     print "FAILED as expected"
>   else:
>     print "SUCCEEDED unexpectedly"
>
>   try:
>     db.Execute ('SELECT id, data FROM dtest')
>   except:
>     print "FAILED unexpectedly"
>   else:
>     print "SUCCEEDED as expected"
>
>   adox = Dispatch ("ADOX.Catalog")
>   adox.ActiveConnection = db
>   adox.Tables ("dtest").Columns ("data").Name = "newdata"
>   adox.Tables.Refresh ()
> finally:
>   db.Close ()
>
> db = Dispatch ('ADODB.Connection')
> db.Open (CONNECTION_STRING)
> try:
>
>   try:
>     db.Execute ('SELECT id, data FROM dtest')
>   except:
>     print "FAILED as expected"
>   else:
>     print "SUCCEEDED unexpectedly"
>
>   try:
>     db.Execute ('SELECT id, newdata FROM dtest')
>   except:
>     print "FAILED unexpectedly"
>   else:
>     print "SUCCEEDED as expected"
>
> finally:
>    db.Close ()
>
> </code>
>
> TJG


Excellent, many thanks.

Iain


From maxinbjohn at gmail.com  Thu May  8 07:38:12 2008
From: maxinbjohn at gmail.com (maxinbjohn)
Date: Thu, 8 May 2008 04:38:12 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
Message-ID: <12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>

Hi Raxit,

One of the the tempting features of Python is that it is fun to code
in Python. If you are really trying to learn python, you should read
Adventures with Neko (http://gnuvision.com/books/pybook/) . It is an
introductory book on Python programming for school children by Mr.
Pramode CE.

It is fun for children (when I tried it, me too liked it) to do
programming with Neko, the cat. I am sure that it will be a fun filled
learning experience for you.

Regards,

Maxin B. John

pistacchio wrote:
> Raxit at MyKavita.com ha scritto:
> > Hi,
> >
> > i was reading/learning some hello world program in python.
> > I think its very simillar to Java/C++/C#. What's different (except
> > syntax) ?
> >
>
> well, it's similar in the sense that it is a programming language. So
> you can say that assembly is similar to BASIC, but that both are
> different from finnish, but from a programmer's point of view, they're
> all rather different languages.
>
> > what can i do easily with python which is not easy in c++/java !?
> >
>
> generally speaking python is said to be easier to pick up for a pletora
> of reasons. technically speaking, it is not, for example, strongly
> typed, nor it forces you to use a programming paradigm like object
> oriented programming.
> This means that if you just want to see your name printed on the screen
> you can simply write:
>
> print "raxit"
>
> and get the work done. to understand it you just have to understand some
> basics like what is a string and what is a statement.
>
> in java, for example, it would look like:
>
> public class HelloWorld {
>       public static void main(String[] args) {
>           System.out.println("raxit");
>       }
>   }
>
> in short, to obtain the same result (limited to this case) you have to
> write 650% more code and you're forced to know what is a class, what
> namespace means, what is a function (and arguments) and what are methods
> and the dot notation and an array. not that you won't encounter all of
> them learning python, but you're presented with all of them, all at
> once, in the moment where you just want to write the simplest program.
> that's why a typical java beginner's guide starts with ditto examples
> and adds: "ignore everything for the moment". i hate when i have to
> ignore things of a code that i'm writing!
>
> the same applies to C# and, to a certain extend, C++ that is a much
> older language and present different learning problems.
> Now, what can you do with python? Virtually everything (network
> programming, game programming, server side scripting). In most cases, it
> would run slower than it would do with the other languages (even slower
> than the slow java). You won't do drivers or kernels in python, but you
> won't even code them in java or C#.
> the programs you'll write will mostly run on a number of different
> platform, like java programs. porting a c++ is a bit tougher. at the
> moment there is project (mono) that is porting the .net platform (where
> c# runs) to multiple platforms, but basically, if you write a c# program
> you're programming for windows.
> hope it helps
>
>
>
> > Tnx,
> > Raxit
> > www.mykavita.com


From upton at virginia.edu  Wed May 21 12:00:44 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:00:44 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805210900w47ad3a81mc7b433d18b7a6059@mail.gmail.com>

On Wed, May 21, 2008 at 11:34 AM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> For example, consider the two statements:
>
>     x = 8
>     x = 10
>
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".

Sounds to me like the teacher is being difficult, and IIRC,  you've
talked about having elementary school kids write in FT -- I don't
think asking "does this make sense to you" of elementary school kids
is necessarily the best metric for PL syntax/semantics.

> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).
>
> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.

If you can't do, or don't like, math, you probably shouldn't be
programming.  If you don't have any symbolic reasoning skills, you're
largely limited to "Hello, World."

> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:
>
> Set QuadraticEquation to a*x^2 + b*x + c = 0.

You keep trotting out this quadratic equation example, but does FT
actually have any kind of useful equation solver in it?  Or does it
just allow you to do something like

Set QuadraticEquation to a*x^2 + b*x + c = 0.
Set a to 1.
Set b to 0.
Set c to -25.
Set x to 5.
If QuadraticEquation is True then do ....


From mblume at socha.net  Wed May 28 13:19:27 2008
From: mblume at socha.net (mblume)
Date: 28 May 2008 17:19:27 GMT
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org>
	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
Message-ID: <483d941f$0$9032$5402220f@news.sunrise.ch>

Am Tue, 27 May 2008 12:37:34 -0700 schrieb Dennis Lee Bieber:
> 
> 	From the library reference:
> """
> Support for the %Z directive is based on the values contained in tzname
> and whether daylight is true. Because of this, it is platform-specific
> except for recognizing UTC and GMT which are always known (and are
> considered to be non-daylight savings timezones). """
> 
> 	The only value that passed for me was UTC (I didn't try GMT) but...
> 
For me, only UTC, GMT, CET and CEST (Central European [Summer] Time) work.
My time.tzname is ('CET', 'CEST').
I think the documentation must be read that ***only*** 
UTC,GMT,time.tzname work.

Also, time zone names are not unique: EST can be Eastern Summer Time (US) 
as well as Eastern Summer Time (Australia).

For working with time zones, I think that a module like pytz
http://pytz.sourceforge.net/
may be better suited.

My 0.02c.
Martin


From cbhoem at gmail.com  Thu May  1 09:02:35 2008
From: cbhoem at gmail.com (cbhoem at gmail.com)
Date: Thu, 1 May 2008 06:02:35 -0700 (PDT)
Subject: Cookie Confusion - How to Set a Cookie
References: <588d6a6c-0080-48a4-b768-e2c5ef551790@s50g2000hsb.googlegroups.com>
	<cc4194a8-ca9f-4e91-a67d-8096d717e165@b64g2000hsa.googlegroups.com> 
	<bb13634a-ff00-49c1-b07b-34ea4dd448d7@a70g2000hsh.googlegroups.com> 
	<94d81004-fc6d-4ff9-9500-143864a6d7a7@f63g2000hsf.googlegroups.com>
Message-ID: <eb94abcb-3172-458c-beba-65680b307818@b64g2000hsa.googlegroups.com>

On Apr 29, 3:35 pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
> > Thanks for the code, Aaron.  I will give it a try.
>
> > I've been reading some more about cookielib and am not sure whether I
> > should use Cookie or cookielib.  This is what I want to do:  a user is
> > going to login.  Upon a successful login, I want to write their name
> > and date/time of visit to a cookie file. Which is the correct python
> > module to use?
>
> Cookie does parsing and generation of cookie strings
> for server-side applications like your CGI script.
>
> The cookielib module
> is designed for either implementing a client like a web browser
> or emulating a client/browser (for web scraping, for example).
>
> I think you want to use Cookie.
> The distinction could be made clearer in
> the docs, imho.
>
> Also, when you say "write the cookie file" I think you mean
> "store the cookie to the client browser".  This should happen
> automatically when you send the cookie header to the client
> correctly (if the client is configured to cooperate).
>
>   -- Aaron Watters
>
> ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=default+does+n...


Sorry for the slow replies.  I've been in & out with a sick child.

I'm used to my javascript cookies.  They are automatically written to
a cookie.txt file in a .mozilla dir under my user.  When I say to
'write the cookie file' this is what I was referring to.  I was
expecting my python cookie to automatically get written to the same
file.  I have't seen this happen yet.


From alex.m.gusarov at gmail.com  Tue May 27 07:20:24 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:20:24 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
In-Reply-To: <db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>
Message-ID: <ac6dcb3d0805270420n2671c1c0n77893fd54a395f79@mail.gmail.com>

> class MultiHandler(object):
>        def __init__(self, owner, *initial_handlers):
> ...
> ...
> ...
> calendar = Calendar()
> calendar.on_paint = MultiHandler(calendar, Calendar.on_paint)
>
> calendar.on_paint()
> calendar.on_paint += handler1
> calendar.on_paint()
> calendar.on_paint += handler2
> calendar.on_paint()

Marek, this seems exactly what I want, thanks, I will try it.
Thanks everybody. Yes, I'm newbie, so may be it was a dumb question,
don't judge me.

--
Best regards, Alex Gusarov


From sposnjak at gmail.com  Mon May  5 09:41:08 2008
From: sposnjak at gmail.com (Simon Posnjak)
Date: Mon, 5 May 2008 15:41:08 +0200
Subject: How to convert unicode string to unsigned char *
Message-ID: <725404980805050641s52cac3b8mf238ff29883c6dba@mail.gmail.com>

Hi!

I have a C module for which I created a wrapper with swig. The function def is:

C:

int some_thing(unsigned char * the_str);

eg:

Python:

some_module.some_thing (the_str)

Now I would like to feed it with a UTF-8 formatted string:

test = u'Make \u0633\u0644\u0627\u0645, not war.'

If I try:

some_module.some_thing (test)

I get:

TypeError with message: in method 'some_thing', argument 1 of type
'unsigned char *'

I also tried to pack the string into array or struct but I can not get
it to work.

What would be the best solution for this problem?

[I am working on Windows]

Regards Simon


From pavlovevidence at gmail.com  Wed May 28 22:38:27 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 28 May 2008 19:38:27 -0700 (PDT)
Subject: FW: php vs python
References: <mailman.1701.1212008396.12834.python-list@python.org> 
	<1cc9a56b-c1d4-4fad-968b-a87684ccfc12@l64g2000hse.googlegroups.com>
Message-ID: <dff8b18c-1d99-468a-9dfd-bb1d23b5c22a@r66g2000hsg.googlegroups.com>

On May 28, 7:45 pm, blaine <frik... at gmail.com> wrote:
> On May 28, 4:47 pm, "Phil Runciman" <ph... at aspexconsulting.co.nz>
> wrote:
>
>
>
> > -----Original Message-----
> > From: Jerry Stuckle [mailto:jstuck... at attglobal.net]
> > Sent: Wednesday, 28 May 2008 1:48 p.m.
> > To: python-l... at python.org
> > Subject: Re: php vs python
>
> > Ivan Illarionov wrote:
> > > On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>
> > >> Greetings, Ivan Illarionov.
> > >> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>
> > >>>> As I've said before - good programmers can write good code in any
> > >>>> language.
> > >>> Yes, they can. But it may be harder to do for them in one language
> > and
> > >>> easier in another.
> > >> It's obvious lie. If you have clear mind and you know language you're
> > >> using, there are absolutely NOTHING can deny you to write clear code.
> > >> Even using forth postfix notation, I have no problem writing good
> > code,
> > >> it's as easy as writing bad code. And yes, I do see the difference.
>
> > > No. Language does matter.
>
> > Yes it does matter.
>
> > I have programmed in many assembly and higher level languages.
>
> > In OldenTimes:
> > In Algol 60 I was productive from the start.
> > KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
> > made it even better).
> > IBM 360 Assembly was poorer but not a disaster.
> > PL1 was a mess. You could write good code but why bother?
> > COBOL was fit for purpose and when combined with Jackson structured
> > programming could be used straight away by rooky programmers in business
> > systems programming. I am sure it has progressed since ANSI 68.
>
> > The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
> > if language does not matter?
>
> > My 2c worth.
>
> http://www.fukung.net/v/7729/php_vs_python.png
> :)

Ha ha.  Took me a second.

Carl Banks


From mensanator at aol.com  Thu May 15 15:24:59 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 15 May 2008 12:24:59 -0700 (PDT)
Subject: Computer
References: <b9771c23-7119-4f8f-8387-b54f6a7197aa@f24g2000prh.googlegroups.com>
Message-ID: <e3ad9786-1a17-42c8-ac92-4e7471655572@m45g2000hsb.googlegroups.com>

On May 15, 1:14?pm, gaojihuiyuan <gaojihuiy... at yahoo.cn> wrote:
> Plastic Coat Your Cedar with EPL
> EPL is a clear thin polymer coat that will maintain the bright cedar
> wood look. Buy online today.http://www.healthhuman.com.cn/Computer.htm
>
> Cedar Wood
> Find Deals on Cedar Wood and other Home & Garden Products at DealTime.
> Choose from millions of deals. Save time and money every time you
> shop.http://www.healthhuman.com.cn/Computer.htm
>
> Cedar Wood - Bargain Prices
> Shop fast, Buy smart, Shopzilla for Wood Outdoor Furniture and other
> Furniture and Outdoor Decor. Every product from every store means you
> get a Bargain Price. Don't just shop, Shopzilla.http://www.healthhuman.com.cn/Computer.htm

I'll keep that in mind the next time I buy a wooden computer.


From http  Wed May  7 02:02:11 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:02:11 -0700
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <7x3aouejoc.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
> if the idea is to maximize the popularity, GPL is a worse bet.

That is not a valid inference.  Look at the popularity of Linux vs
BSD, for example.


From wizzardx at gmail.com  Thu May  8 08:49:37 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 14:49:37 +0200
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>

On Thu, May 8, 2008 at 2:11 PM, Michael Mabin <d3vvnull at gmail.com> wrote:
> Does python have an equivalent to Perl's inplace-edit variable $^I?
>

I misread your question.

No, Python eschews magic characters and symbols. They make code ugly
and harder to read and maintain.

The first 3 lines of the Zen of Python:

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.

You might find a variable like that in Ruby, which has strong Perl influences.

David.


From wojtek.gminick.walczak at gmail.com  Mon May  5 08:17:37 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Mon, 5 May 2008 14:17:37 +0200
Subject: pygame music, cant read mp3?
In-Reply-To: <5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
Message-ID: <2c3c21060805050517j49f84ac1u52e288d18db11aea@mail.gmail.com>

2008/5/5, globalrev <skanemupp at yahoo.se>:
> pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')


Are you sure that:

os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?

Check it with python.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From skunkwerk at gmail.com  Mon May 12 15:29:16 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:29:16 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<SeWdnTmd7Z7HwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com>
Message-ID: <a8d1d958-74e8-4bde-8260-9e5c06c2954f@n1g2000prb.googlegroups.com>

On May 11, 1:55 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sun, 11 May 2008 09:16:25 -0700 (PDT),skunkwerk
> <skunkw... at gmail.com> declaimed the following in comp.lang.python:
>
>
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?  It wouldn't help having a .pyc or using
> > psycho, correct, as the time is being spent in the runtime?  something
> > along the lines of 'start a new thread every minute until you get to a
> > 100' without blocking the execution of the rest of the code in that
> > file?  or maybe any time i need to do a search, start a new thread if
> > the #threads is <100?
>
>         Is this running as part of the server process, or as a client
> accessing the server?
>
>         Alternative question: Have you tried measuring the performance using
> /fewer/ threads... 25 or less? I believe I'd mentioned prior that you
> seem to have a lot of overhead code for what may be a short query.
>
>         If the .get_item() code is doing a full sequence of: connect to
> database; format&submit query; fetch results; disconnect from
> database... I'd recommend putting the connect/disconnect outside of the
> thread while loop (though you may then need to put sentinel values into
> the feed queue -- one per thread -- so they can cleanly exit and
> disconnect rather than relying on daemonization for exit).
>
> thread:
>         dbcon = ...
>         while True:
>                 query = Q.get()
>                 if query == SENTINEL: break
>                 result = get_item(dbcon, query)
>                 ...
>         dbcon.close()
>
>         Third alternative: Find some way to combine the database queries.
> Rather than 100 threads each doing a single lookup (from your code, it
> appears that only 1 result is expected per search term), run 10 threads
> each looking up 10 items at once...
>
> thread:
>         dbcon = ...
>         terms = []
>         terminate = False
>         while not terminate:
>                 while len(terms) < 10:
>                         query = Q.get_nowait()
>                         if not query: break
>                         if query == SENTINEL:
>                                 terminate = True
>                                 break
>                         terms.append(query)
>                 results = get_item(dbcon, terms)
>                 terms = []
>                 #however you are returning items; match the query term to the
>                 #key item in the list of returned data?
>         dbcon.close()
>
> where the final select statement looks something like:
>
> SQL = """select key, title, scraped from ***
>                         where key in ( %s )""" % ", ".join("?" for x in terms)
>         #assumes database adapter uses ? for placeholder
> dbcur.execute(SQL, terms)
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com         wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

thanks again Dennis,
   i chose 100 threads so i could do 10 simultaneous searches (where
each search contains 10 terms - using 10 threads).  the .get_item()
code is not doing the database connection - rather the intialization
is done in the initialization of each thread.  so basically once a
thread starts the database connection is persistent and .get_item
queries are very fast.  this is running as a server process (using
django).

cheers


From irmen.NOSPAM at xs4all.nl  Sat May 10 10:22:52 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 10 May 2008 16:22:52 +0200
Subject: Simple question
In-Reply-To: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <4825afc8$0$14350$e4fe514c@news.xs4all.nl>

Gandalf wrote:
> On May 10, 2:36 pm, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Gandalf wrote:
>>> how can i ran script with python
>> It depends on your web server configuration. To get your web server
>> execute Python code, there are several alternatives like
>>
>> * CGI
>> * FastCGI
>> * mod_python
>>
>> Regards,
>>
>> Bj?rn
>>
>> --
>> BOFH excuse #93:
>>
>> Feature not yet implemented
> 
> my server is my computer and all i did way to install python on it.


You might want to read a bit more about Python and how it can be used for web 
programming. Because your question is not easily answered.

I suggest the following at least:

http://wiki.python.org/moin/PythonVsPhp
	(especially the "Compared as Web Development Frameworks" section)

http://wiki.python.org/moin/WebProgramming



Good luck.

--irmen


From inhahe at gmail.com  Mon May 26 15:52:23 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:52:23 -0400
Subject: Question about wsgi.input
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
	<6a0htmF35sj8eU1@mid.uni-berlin.de>
Message-ID: <wwE_j.50552$7a.48515@bignews1.bellsouth.net>

That's what I would have thought, just seems strange since it seems to imply 
that if I use StringIO or cStringIO, then whenever i write to it i have to 
save the position, seek to the end, write, and then seek to the position i 
saved.  Are there any other classes that are more suitable for pipes, but 
qualify as 'file-like objects'?

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:6a0htmF35sj8eU1 at mid.uni-berlin.de...
> inhahe schrieb:
>> I'm sorry if this is off-topic, i couldn't find a mailing list OR forum 
>> for WSGI (and #wsgi wasn't very helpful).
>>
>> i played around with StringIO, and apparently if you write to a stringio 
>> the position gets set to the end of the write, so if you read from it 
>> again, without using seek, you won't read what comes next, you'll skip to 
>> the end of the write.  and if you write without seeking to the end first, 
>> you'll overwrite part of the string if the reading hasn't caught up.
>>
>> WSGI says that wsgi.input should block if there's more data to be read 
>> from the socket, until that data is available. so when the server writes 
>> to the file object, what happens to the file position? if i were writing 
>> a WSGI app, i would just seek() to the last place my read ended at just 
>> to make sure.  but i'm making a server, so i need to know whether i 
>> should leave the position at the end of the write, when it blocks (or for 
>> that matter, if i'm writing while it's still reading), or at the end of 
>> the previous read?
>
> I'm not sure exactly about what you are talking here - but generally, 
> wsgi.input should be considerd being a pipe. One (the server) simply 
> writes into it. The WSGI-app just reads. No seek.
>
> Diez 




From johnroth1 at gmail.com  Sun May 25 09:17:58 2008
From: johnroth1 at gmail.com (John Roth)
Date: Sun, 25 May 2008 06:17:58 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
Message-ID: <f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>

On May 24, 7:22 am, Andr? <andre.robe... at gmail.com> wrote:

>
> I can't relate to anyone that want to oppose a change that would give
> more freedom to a programmer.
>
> Andr?

Well, you can already do that. Or anything else you want. It's not all
that difficult to change the algorithms in the unittest package
_without_ patching the code. How to do it could be better documented,
granted.

For my major project (Python FIT) I've got my own test case extraction
mechanism that doesn't depend on patching the code. It lets me use any
name I want - that is, it doesn't depend on any kind of pattern match.
(It also avoids looking in subclasses for tests.) I find the naming
freedom to be quite useful in thinking about the test case.

I really don't care what the OP does in his own projects. My objection
is that, if it goes into the standard library, is that it passes a
signal that it's good practice to allow dependencies between tests. It
most definitely is _not_ good practice.

I like the technique of looking at the line numbers to get the
declaration order; it ought to be documented somewhere.

The proper place for this is either a recipe (
http://aspn.activestate.com/ASPN/Cookbook/Python/ ) or a note in the
documentation with a caveat that it's not good practice, but it may be
useful in some circumstances.

John Roth





From kyosohma at gmail.com  Tue May 20 17:16:20 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 14:16:20 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
	<mailman.1395.1211312728.12834.python-list@python.org> 
	<f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com> 
	<mailman.1399.1211316259.12834.python-list@python.org>
Message-ID: <83b42c06-22e3-4818-af47-6aa419336ed2@l28g2000prd.googlegroups.com>

On May 20, 3:43?pm, Christian Heimes <li... at cheimes.de> wrote:
> Mike Driscoll schrieb:
>
>
>
> > On May 20, 2:45 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> >> Bob Greschke wrote:
> >>> This MUST have been asked before, but I can't seem to Google the right
> >>> thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> >>> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
> >> A couple of options to get the ball rolling:
>
> >> 1) win32api.GetLogicalDriveStrings()
>
> > I gave this a go to see how it worked and ti gave me this:
>
> > 'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
> > \x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'
>
> > Not exactly what I expected. Do I have to parse out the "\\\x00"
> > myself or is there an information level switch I should add?
>
> The data is separated by NUL bytes. Split it with \x00 and you'll get a
> list of drives:
>
> "A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00".split("\x00")
> ['A:\\', 'C:\\', 'D:\\', 'G:\\', 'I:\\', 'L:\\', 'P:\\', 'Q:\\', 'R:\\',
> 'U:\\', 'X:\\', 'Y:\\', 'Z:\\', '']
>
> Christian

Yeah, I noticed that. I just thought that was a weird piece of info
for the call to return.

Mike


From jaywgraves at gmail.com  Fri May 16 17:21:57 2008
From: jaywgraves at gmail.com (jay graves)
Date: Fri, 16 May 2008 14:21:57 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <8f70d02b-2626-4d50-8d2e-7656b925987e@d1g2000hsg.googlegroups.com>

On May 16, 3:24 pm, globalrev <skanem... at yahoo.se> wrote:
> On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
> > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
> > > i extract info from one file and put it into a dictionary.
> > > i want to save that dictionary for later use, how do i do that?
> > > might save a list of dictionaries or a list of classobjects too if
> > > there is any difference.
> > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html

> pickle.dumps(mg)
> pickle.load(mg)
>
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

It's best to post a minimal set of code that exhibits your error.
You aren't saving the output of pickle.dumps and you are using
pickle.load instead of pickle.loads.

Sample loading to and from a string which you can tuck away in a file.

>>> import pickle
>>> test = {'a':1,'b':2}
>>> picklestr = pickle.dumps(test)
>>> test2 = pickle.loads(picklestr)
>>> test == test2
True
>>>


Sample using an open file.

>>> import pickle
>>> test = {'a':1,'b':2}
>>> pfile = open('pickletest','wb')
>>> pickle.dump(test,pfile)
>>> pfile.close()
>>> pfile = open('pickletest','rb')
>>> test2 = pickle.load(pfile)
>>> pfile.close()
>>> test == test2
True
>>>

...
Jay Graves


From kw at codebykevin.com  Sat May 10 11:31:37 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:31:37 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.896.1210396853.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <4825BFD9.7020600@codebykevin.com>

Kenneth McDonald wrote:
> Any guesses as to how many people are still using Tkinter? And can 
> anyone direct me to good, current docs for Tkinter?
> 
> Thanks,
> Ken

I develop Tk applications commercially on Mac OS X, using Tcl and 
Python. Here's a screenshot of my Python app:

http://www.codebykevin.com/phynchronicity-running.png

This app is built on Python 2.5.1 and Tk 8.5.0. Tk 8.5 has a huge number 
of improvements over older versions of Tk:

http://www.tkdocs.com/resources/backgrounder.html

Most importantly, Tk 8.5 has a themed widget set that allows for 
platform-native appearance on Windows and Mac (not emulated, but hooking 
into system API's). The themed widget set also adds a lot of new 
widgets, such as combobox, tree, and others. The older widget set is 
still available as well and they can be freely matched. Tk also has a 
lot of lightweight, script-level widget libraries that can also enhance 
the appearance and usability of your app.

My own app uses widgets from Tk's traditional set, the new Tile/ttk set, 
the Tabelist widget, and the BWidget widget library. It uses the 
following Python wrappers for these widgets:

http://tkinter.unpy.net/wiki/TileWrapper
http://tkinter.unpy.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/bwidget/

It also uses a few private wrappers/custom widgets.

In addition to the Python-specifc resources that others have provided, 
here's a new site that documents the latest-and-greatest Tk techniques, 
including Tile/ttk:

http://www.tkdocs.com/

The developer of this site is mainly interest in Tcl and Ruby, so 
examples of those are provided--I may provide some Python examples at 
some point. But there should be enough code snippets there for you to 
get started, especially if you already have some experience with 
Tk/Tkinter.

Tk still has some limitations, including a lack of cross-platform 
printing support (the canvas widget generates postscript, but that's not 
enough anymore) and an incomplete cross-platform drag-and-drop mechanism 
(works fine on Windows, it's buggy on *NIx because Xdnd is so 
inconsistent, and it was never developed for OS X). If you absolutely 
need these features, look at wxPython or PyQt. But coming to Python from 
a Tcl background, I'm very comfortable with Tk--it is lightweight, 
extremely flexible, and (as I hope you can see from my screenshot) it's 
possible to do sophisticated user interfaces with it. It fits my brain 
much better than wxPython, for instance. And the long effort by Tk's 
developers to modernize its appearance has finally paid off, I think.

Hope that helps,
Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From mail at timgolden.me.uk  Thu May  8 15:50:36 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 08 May 2008 20:50:36 +0100
Subject: How to gather information about the system hardware?
In-Reply-To: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>
References: <c496e0a70805080014k5f3079b5te5ec1fa35d6f0bbf@mail.gmail.com>
Message-ID: <4823598C.8010606@timgolden.me.uk>

Florencio Cano wrote:
> Hi,
> I'm looking for a method of gathering information about the system
> hardware and software installed using Python. I would like to do it in
> UNIX and in Windows. I think that it would be good in Windows to look
> in the registry and be able to parse and search it. Any pointer to
> information would be appreciated.

For Windows WMI is probably a good bet.

TJG


From nick at craig-wood.com  Sat May  3 14:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 13:30:03 -0500
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <slrng1paa5.eab.nick@irishsea.home.craig-wood.com>

Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>  I did the following calculation:  Generated a list of a million random 
>  numbers between 0 and 1, constructed a new list by subtracting the mean 
>  value from each number, and then calculated the mean again.
> 
>  The result should be 0, but of course it will differ from 0 slightly 
>  because of rounding errors.
> 
>  However, I noticed that the simple Python program below gives a result 
>  of ~ 10^-14, while an equivalent Mathematica program (also using double 
>  precision) gives a result of ~ 10^-17, i.e. three orders of magnitude 
>  more precise.
> 
>  Here's the program (pardon my style, I'm a newbie/occasional user):
> 
>  from random import random
> 
>  data = [random() for x in xrange(1000000)]
> 
>  mean = sum(data)/len(data)
>  print sum(x - mean for x in data)/len(data)
> 
>  A little research shows that Mathematica uses a "compensated summation" 
>  algorithm.  Indeed, using the algorithm described at
>  http://en.wikipedia.org/wiki/Kahan_summation_algorithm
>  gives us a result around ~ 10^-17:

I was taught in my numerical methods course (about 20 years ago now!)
that the way to do this sum with most accuracy is to sum from the
smallest magnitude to the largest magnitude.

Eg

  >>> from random import random
  >>> data = [random() for x in xrange(1000000)]
  >>> mean = sum(data)/len(data)
  >>> print sum(x - mean for x in data)/len(data)
  1.64152134108e-14
  >>> mean = sum(sorted(data))/len(data)
  >>> print sum(x - mean for x in data)/len(data)
  5.86725534824e-15
  >>>

It isn't as good as the compensated sum but it is easy!

>  I thought that it would be very nice if the built-in sum() function used 
>  this algorithm by default.  Has this been brought up before?  Would this 
>  have any disadvantages (apart from a slight performance impact, but 
>  Python is a high-level language anyway ...)?

sum() gets used for any numerical types not just floats...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jcd at sdf.lonestar.org  Tue May 20 11:50:17 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 20 May 2008 11:50:17 -0400
Subject: Help with character encodings
In-Reply-To: <4832EE29.5020700@islandtraining.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
	<4832EE29.5020700@islandtraining.com>
Message-ID: <1211298617.30679.9.camel@aalcdl07.lib.unc.edu>

On Tue, 2008-05-20 at 08:28 -0700, Gary Herron wrote:
> A_H wrote:
> > Help!
> >
> > I've scraped a PDF file for text and all the minus signs come back as
> > u'\xad'.
> >
> > Is there any easy way I can change them all to plain old ASCII '-' ???
> >
> > str.replace complained about a missing codec.
> >
> >
> >
> > Hints?
> >   
> 
> Encoding it into a 'latin1' encoded string seems to work:
> 
>   >>> print u'\xad'.encode('latin1')
>   -
> 
> 
Here's what I've found:

>>> x = u'\xad'
>>> x.replace('\xad','-')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xad in position 0:
ordinal not in range(128)
>>> x.replace(u'\xad','-')
u'-'

If you replace the *string* '\xad' in the first argument to replace with
the *unicode object* u'\xad', python won't complain anymore.  (Mind you,
you weren't using str.replace.  You were using unicode.replace.  Slight
difference, but important.)  If you do the replace on a plain string, it
doesn't have to convert anything, so you don't get a UnicodeDecodeError.

>>> x = x.encode('latin1')
>>> x
'\xad'
>>> # Note the lack of a u before the ' above.
>>> x.replace('\xad','-')
'-'
>>> 

Cheers,
Cliff




From agustin.villena at gmail.com  Thu May 22 11:28:13 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Thu, 22 May 2008 08:28:13 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
Message-ID: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>

On May 22, 5:19 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Agustin Villena a ?crit :
>
> >> And not that useful - why would one care about the function being
> >> defined in class X or Y when one have the exact file and line ?
>
> > I have 3 reasons:
>
> > 1) My developing time is expended running unit tests and browsing
> > tracebacks to find which is the real problem. Knowing the offender
> > class (instead of the method alone) makes me understand more quickly
> > which component of my software is failing.
>
> This is only true when there is an obvious, one-to-one, unambiguous
> relationship between the physical location of the error (file, line) and
> the class of the object the method has been called on. Which is not
> necessarily the case (inheritance, method decoration and monkeypatching
> comes to mind here...).
>
> Also, your above statement seems to imply that component==class, which
> is not the case in Python.
>
> > 2) There are some ocassions where I only have the traceback (e.g. when
> > analyzing an app's log) and no inmediate access to teh source code
>
> Ok. But the above still apply...
>
> > 3) And finally, for completeness: If a function is really a method, if
> > the traceback show only its name and not the class that defines it,
> > for me its a bug, because the method name has no sense out of its
> > class.
>
> I'm not sure you really grasp what "methods" are in Python. What you
> define (using the def statement) within a class is function, not a
> method. It only becomes a method when it's looked up on an instance or
> class object, and this 'method' is only a thin wrapper around the
> instance, class and function objects. And FWIW, you don't need to define
> the function within the class to make it a method:
>
> # bar.py
> def bar(obj):
>    print "function bar.bar called on obj %s" % obj
>
> # foo.py
>
> class Foo(object): pass
>
> # baaz.py
> from foo import Foo
> import bar
>
> Foo.baaz = bar.bar
>
> def guux(obj):
>    print "function baaz.guux called on obj %s" % obj
>
> # main.py
> from baaz import Foo
> f = Foo()
> f.bar()
>
> f.gnix = baae.guux.__get__(f, type(f))
> f.gnix()
>
> Not to say that your concerns are pointless, and that things cannot be
> improved somehow, but this is not that trivial, and there may be
> ambuiguities in some not so rare cases.

Well, the solution given in an early response is good enough for me.

I don't see things like you, because I'm accustomed to design my
software
though classes and see the code in an "object = software's functional
atom/component" way
I agree that python's dynamic nature make things complicated here, but
for me it its just
an implementation problem derived of the recent OOP support of python


From __peter__ at web.de  Wed May 28 04:11:19 2008
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 May 2008 10:11:19 +0200
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
Message-ID: <g1j436$6i8$02$1@news.t-online.com>

Gary Herron wrote:

> Alok Kumar wrote:
>> Dear All,
>>
>> I am using dictionary for filling my xpath parsed data.
>>
>> I wanted to use in the following manner.
>>
>> mydict[index] ["key1"] ["key2"]    #Can someone help me with right
>> declaration.
>>
>> So that I can fill my XML xpath parsed data
>>  
>> mydict[0] ["person"] ["setTime"] = "12:09:30"
>> mydict[0] ["person"] ["clrTime"] = "22:09:30"

[I didn't see the original post]

>>> from collections import defaultdict
>>> def make_inner():
...     return defaultdict(lambda: defaultdict(make_inner))
...
>>> mydict = make_inner()
>>> mydict[0]["person"]["setTime"] = "12:09:30"
>>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
>>> mydict
defaultdict(<function <lambda> at 0x2b7afd0025f0>, {0: defaultdict(<function
make_inner at 0x2b7afd002578>, {'person': defaultdict(<function <lambda> at
0x2b7afd002668>, {'setTime': '12:09:30', 'shoes': defaultdict(<function
make_inner at 0x2b7afd002578>, {'color': 'bright yellow'})})})})

If that looks too messy, try a subclass:

>>> class Dict(defaultdict):
...     def __init__(self):
...             defaultdict.__init__(self, Dict)
...     def __repr__(self):
...             return dict.__repr__(self)
...
>>> mydict = Dict()
>>> mydict[0]["person"]["setTime"] = "12:09:30"
>>> mydict
{0: {'person': {'setTime': '12:09:30'}}}
>>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
>>> mydict
{0: {'person': {'setTime': '12:09:30', 'shoes': {'color': 'bright
yellow'}}}}

Peter


From bblais at bryant.edu  Fri May 23 11:44:11 2008
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 23 May 2008 11:44:11 -0400
Subject: Python is slow
In-Reply-To: <8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
	<g1570j$n8g$1@aioe.org>
	<8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>
Message-ID: <3C750143-6BC0-4626-98A6-44FFA16FE142@bryant.edu>

On May 23, 2008, at May 23:10:11 AM, Grant Edwards wrote:

> On 2008-05-23, RPM1 <rpm9deleteme at earthlink.net> wrote:
>> Larry Bates wrote:
>>> If your Python program is slow, you have almost assuredly
>>> approached it with a wrong method or algorithm.
>>
>> I agree for most applications.  There are however times where
>> Python just isn't fast enough, and that's usually when people
>> write extension modules.
>
> Writing an extension modules is probably pretty far down the
> list.  What usually happens is people

I think that really depends on what you are doing.  For me, it is  
exactly as Larry said.  I prototype in Python, then profile to figure  
out the slowest piece(s), and write an extension module.  Personally,  
I use Cython which makes the transition pretty trivial.  It is this  
solution (cython, that is) that convinced me to use Python over Ruby,  
or some other language, when I was moving code from Matlab.  I  
haven't regretted it since.


				bb


-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais



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From mabbikeel at gmail.com  Tue May 27 17:52:35 2008
From: mabbikeel at gmail.com (mabbikeel)
Date: Tue, 27 May 2008 14:52:35 -0700 (PDT)
Subject: Books for learning how to write "big" programs
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
	<mailman.1661.1211921923.12834.python-list@python.org>
Message-ID: <3279f21e-a101-405a-ada9-ecb25bf9e067@x35g2000hsb.googlegroups.com>

On May 27, 9:58?pm, c james <cja... at callone.net> wrote:
> duli wrote:
> > Hi:
> > I would like recommendations for books (in any language, not
> > necessarily C++, C, python) which have walkthroughs for developing
> > a big software project ? So starting from inception, problem
> > definition, design, coding and final delivery on a single theme
> > or application.

I'm not sure, but perhaps Code Complete would be one to check out. I
found it a good read on general design and implementation details, and
has some bits on managing complexity.



From inhahe at gmail.com  Mon May 26 15:21:19 2008
From: inhahe at gmail.com (inhahe)
Date: Mon, 26 May 2008 15:21:19 -0400
Subject: Question about wsgi.input
Message-ID: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>

I'm sorry if this is off-topic, i couldn't find a mailing list OR forum for 
WSGI (and #wsgi wasn't very helpful).

i played around with StringIO, and apparently if you write to a stringio the 
position gets set to the end of the write, so if you read from it again, 
without using seek, you won't read what comes next, you'll skip to the end 
of the write.  and if you write without seeking to the end first, you'll 
overwrite part of the string if the reading hasn't caught up.

WSGI says that wsgi.input should block if there's more data to be read from 
the socket, until that data is available. so when the server writes to the 
file object, what happens to the file position? if i were writing a WSGI 
app, i would just seek() to the last place my read ended at just to make 
sure.  but i'm making a server, so i need to know whether i should leave the 
position at the end of the write, when it blocks (or for that matter, if i'm 
writing while it's still reading), or at the end of the previous read?

thanks for any help.







From stefan_ml at behnel.de  Wed May 28 16:04:23 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 28 May 2008 22:04:23 +0200
Subject: BeautifulSoup: problems with parsing a website
In-Reply-To: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>
References: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>
Message-ID: <483DBAC7.1050900@behnel.de>

Marco Hornung wrote:
> Hy guys,

... and girls?


> I'm using the python-framework BeautifulSoup(BS) to parse some
> information out of a german soccer-website.

consider using lxml.

http://codespeak.net/lxml

    >>> from lxml import html


> I want to parse the article shown on the website.

    >>> tree = html.parse("http://www.bundesliga.de/de/liga/news/
                                    2007/index.php?f=94820.php")

> To do so I want to
> use the Tag " <div class="txt_fliesstext">" as a starting-point.

    >>> div = tree.xpath('//div[@class = "txt_fliesstext"]')


> When
> I have found the Tag I somehow want to get all following "br"-Tags

Following? Meaning: after the div?

    >>> br_list = diff.xpath("following-sibling::br")

Or within the div?

    >>> br_list = diff.xpath(".//br")


> until there is a new CSS-Class Style is coming up.

Ok, that's different.

    >>> for el in div.iter(): # or div.itersiblings():
    ...     if el.tag == "br":
    ...         print el.text # or whatever
    ...     elif el.tag == "span" or el.get("class"):
    ...         break

Hope it helps.

Stefan


From kyosohma at gmail.com  Fri May 23 13:21:47 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 10:21:47 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com>
Message-ID: <dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com>

On May 23, 12:02?pm, Gandalf <goldn... at gmail.com> wrote:
> On May 23, 6:25 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 23, 10:45 am, Gandalf <goldn... at gmail.com> wrote:
>
> > > How can i bind function that handle the mouse clicking ?window X event
> > > or clicking alt+F4
>
> > > thanks
>
> > You really need to learn to ask good questions. Unless people dive
> > into your previous posts, they won't know what Python GUI toolkit you
> > are using, which version of said toolkit, which Python or which OS.
>
> > Here's a good place to read about events in general:
>
> >http://wiki.wxpython.org/EventPropagation
>
> > If you use Google, you can look for the close event, which gives you
> > this:
>
> >http://www.wxpython.org/docs/api/wx.CloseEvent-class.html
>
> > So you'll want to bind your frame to EVT_CLOSE. You can disable the
> > "X" in your frame's window by using non-standard style parameters.
>
> > Mike
>
> OK you right. I use WX on windows XP.
> I didn't understood how to use this wx.CloseEvent function.
>
> i really struggle with my poor english to understand this language, so
> your help is crucial for my progress and i appreciate it
>
> Thanks

No problem. It just makes it much harder to help if we don't know what
you're doing. I forget to mention stuff when I post too.

Just in case you still don't get it, here's some generic code:

<code>

self.frame.Bind(wx.EVT_CLOSE, self.onClose)

def onClose(self, event):
    self.frame.Destroy()

</code>

Note that I called the frame's Destroy() method instead of its Close()
method. If you call Close() then the EVT_CLOSE event gets fired again
and you basically end up in a loop.

Mike


From jason.scheirer at gmail.com  Thu May 22 13:41:15 2008
From: jason.scheirer at gmail.com (Jason Scheirer)
Date: Thu, 22 May 2008 10:41:15 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <f16607c9-ebf4-422c-855a-2b96e04457fb@q24g2000prf.googlegroups.com>

On May 22, 9:14?am, cm_gui <cmg... at gmail.com> wrote:
> Python is slow. ? ?Almost all of the web applications written in
> Python are slow. ? Zope/Plone is slow, sloow, so very slooow. ?Even
> Google Apps is not faster. ? Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

This post is a troll written by someone who has already made up their
mind. I really don't recommend trying to argue here. I've written
plenty of fast, fast Python and there are countless Python processes
on servers out there that is not only fast but transparently so.


From byte8bits at gmail.com  Tue May 20 09:37:19 2008
From: byte8bits at gmail.com (brad)
Date: Tue, 20 May 2008 09:37:19 -0400
Subject: Using Python for programming algorithms
In-Reply-To: <482F71B0.3050808@ncf.ca>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca>
Message-ID: <g0uk74$7a4$1@solaris.cc.vt.edu>

> Vicent Giner wrote:

> The usual answer is that development time is more important than running time.

This depends. Run time is not important until you are asked to scale to 
millions or billions of users or computations or large data sets. I've 
seen this first hand. Getting results back the same day or sooner may be 
important. In cases such as this, I use C or C++... nothing else will 
do. Nothing else is as fast. Although I always keep a py version around 
for testing and for smaller tasks. Don't get me wrong, I love Python, 
but there are times when nothing, but pure, hard speed will do.


From deets at nospam.web.de  Fri May 16 12:08:55 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 18:08:55 +0200
Subject: writing python extensions in assembly
In-Reply-To: <5giXj.4881$Kk3.2633@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
	<695ni3F30u8tgU2@mid.uni-berlin.de>
	<5giXj.4881$Kk3.2633@bignews9.bellsouth.net>
Message-ID: <695pt5F30ah0iU1@mid.uni-berlin.de>

inhahe schrieb:
> I like to learn what I need, but I have done assembly before, I wrote a 
> terminal program in assembly for example, with ansi and avatar support.  I'm 
> just not fluent in much other than the language itself, per se.
> 
> Perhaps C would be as fast as my asm would, but C would not allow me to use 
> SIMD, which seems like it would improve my speed a lot, I think my goals are 
> pretty much what SIMD was made for.


That is not true. I've used the altivec-extensions myself on OSX and 
inside C.

Besides, the parts of your program that are really *worth* optimizing 
are astonishly few. Don't bother using assembler until you need to.

Diez


From gherron at islandtraining.com  Fri May 16 20:08:20 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 17:08:20 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
Message-ID: <482E21F4.1090809@islandtraining.com>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
>  
> How do I make it so that I now have:
>  
> starting with first element (a[0])
> new_arr[0] = 'r'
> new_arr[1] = 'g'
> new_arr[2] = 'b'
> new_arr[3] = 'a'
> new_arr[4] = 'r'
> .....
>  
> continuing "through" a[1] with the same new_arr
> new_arr[N] = 'r'
> new_arr[N+1] = 'g'
> ....
>  
> -M

Numpy can do this for you.  First, do you really mean the array to 
contain lists of one string each?  If so:

 >>> import numpy
 >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
 >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')  # Kind of a 
kludge here
 >>> b
array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',
       'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
       'b', 'b', 'a', 'a', 'a', 'a'],
      dtype='|S1')
 >>> b.shape=(2,4,4)
 >>> b
array([[['r', 'r', 'r', 'r'],
        ['g', 'g', 'g', 'g'],
        ['b', 'b', 'b', 'b'],
        ['a', 'a', 'a', 'a']],

       [['r', 'r', 'r', 'r'],
        ['g', 'g', 'g', 'g'],
        ['b', 'b', 'b', 'b'],
        ['a', 'a', 'a', 'a']]],
      dtype='|S1')
 >>> c = b.transpose((2,0,1))
 >>> c
array([[['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']],

       [['r', 'g', 'b', 'a'],
        ['r', 'g', 'b', 'a']]],
      dtype='|S1')
 >>> d=c.copy() # To make it contiguous
 >>> d.shape = (32,)
 >>> d
array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',
       'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
       'b', 'a', 'r', 'g', 'b', 'a'],
      dtype='|S1')

Done.  Cool no?

Gary Herron

>
>
>
>
>     ------------------------------------------------------------------------
>     From: marlin_rowley at hotmail.com
>     To: robert.kern at gmail.com; python-list at python.org
>     Subject: RE: numpy.frombuffer != unpack() ??
>     Date: Fri, 16 May 2008 17:31:30 -0500
>
>     Thank you!  That solved it!
>      
>     -M
>
>
>     ------------------------------------------------------------------------
>
>     > To: python-list at python.org
>     > From: robert.kern at gmail.com
>     > Subject: Re: numpy.frombuffer != unpack() ??
>     > Date: Fri, 16 May 2008 17:25:00 -0500
>     >
>     > Marlin Rowley wrote:
>     > > All:
>     > >
>     > > I'm getting different floating point values when I use numpy
>     vs. unpack().
>     > >
>     > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
>     > > buffer = unpack("!f", byte)
>     > >
>     > > frgba[0] != buffer[0]
>     > >
>     > > why? This is forcing me use the unpack() function since it's
>     giving me
>     > > the correct values. What am I doing wrong?
>     >
>     > Endianness, perhaps? '!' specifies big-endian data (an alias for
>     '>'). Most
>     > likely, you are on a little-endian platform. All of the dtypes
>     in numpy default
>     > to the native-endianness unless specified. If you want to read
>     big-endian data
>     > using numpy, do this:
>     >
>     > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
>     >
>     > If you have any more problems with numpy, please join us on the
>     numpy mailing
>     > list. When reporting problems, please try to provide a small but
>     complete
>     > snippet of self-contained code, the output that you got, and
>     explain the output
>     > that you expected to get. Thank you.
>     >
>     > http://www.scipy.org/Mailing_Lists
>     >
>     > --
>     > Robert Kern
>     >
>     > "I have come to believe that the whole world is an enigma, a
>     harmless enigma
>     > that is made terrible by our own mad attempt to interpret it as
>     though it had
>     > an underlying truth."
>     > -- Umberto Eco
>     >
>     > --
>     > http://mail.python.org/mailman/listinfo/python-list
>
>
>     ------------------------------------------------------------------------
>     E-mail for the greater good. Join the i?m Initiative from
>     Microsoft.
>     <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
>
>
>
> ------------------------------------------------------------------------
> E-mail for the greater good. Join the i?m Initiative from Microsoft. 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From bignose+hates-spam at benfinney.id.au  Sat May 24 21:46:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:46:00 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<mailman.1542.1211661983.12834.python-list@python.org>
Message-ID: <87abif9mw7.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> Yes! One of the biggest advantages to unit testing is that you never
> ever deliver the same bug to the client twice.

More specifically, this is a benefit of putting all unit tests into an
automated test suite, and running that test suite all the time during
development so it's immediately clear when any of them fails due to a
code change.

It's not enough to *have* the unit tests, nor is it enough to only run
them at certain times. They need to run after every change, so the
feedback is immediate and local to the change that was made.

(good sigmonster, have a cookie)

-- 
 \            "Program testing can be a very effective way to show the |
  `\        presence of bugs, but is hopelessly inadequate for showing |
_o__)                              their absence."  -- Edsger Dijkstra |
Ben Finney


From goodz158 at yahoo.com  Thu May  1 02:58:03 2008
From: goodz158 at yahoo.com (Good Z)
Date: Wed, 30 Apr 2008 23:58:03 -0700 (PDT)
Subject: Is vs Equality Operator
Message-ID: <706397.16040.qm@web35903.mail.mud.yahoo.com>

Hello, 
I am having problem in using is. Here is what i am doing.

x=''
if x is None or x is '':
        return 1

The above statement does not return value 1.

If i changed the above check to 
if x == None or x == '':
        return 1
Now it works fine.

Any idea. What is happening here. I am using python 2.4.4 on ubuntu.

Mike


      ____________________________________________________________________________________
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From tarun.kap at gmail.com  Thu May 22 15:56:23 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Thu, 22 May 2008 12:56:23 -0700 (PDT)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
Message-ID: <a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>

On May 22, 2:44 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> TkNeo wrote:
> > I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> > be upgraded. Can you guys tell me if this scenario is possible.
>
> > 1. Any machine that uses .py files that use libraries that require 2.4
> > will have 2.4 on it.
> > 2. rest of the machines will have 2.3
>
> > now there is a shared drive. lets say i write a new library called
> > testlib.py and put it on the shared drive .. when a script uses it
> > from a 2.4 based machine, it will generate a testlib.pyc and leave it
> > on the shared drive. going forward that .pyc is used until the
> > original lib is changed. now lets say a 2.3 based machine is trying to
> > use that lib. it will try to use that pyc file which was compiled by
> > py2.4. will it work or crash ?
>
> It should work, as long as the original .py file is still there.  Each Python
> version will check for a .pyc file *corresponding to that version* (e.g. Python
> 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't
> exist, overwriting any existing .pyc file in the process.
>
> If the original .py file is *not* there, it will most likely not work.  If you
> try to import a .pyc file with the wrong version number, you get something like
> this:
>
>  >>> import foo
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> ImportError: Bad magic number in foo.pyc
>
> I'm not sure what would happen if multiple Pythons try to write a .pyc file at
> the same time, though...
>
> --
> Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/

The original .py will always be there but you know what, multiple
python versions from different computers do access that one library at
the same time.

Anyone know a possible solution ?


From kyosohma at gmail.com  Mon May  5 16:54:59 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 5 May 2008 13:54:59 -0700 (PDT)
Subject: Browser + local Python-based web server vs. wxPython
References: <mailman.588.1209997391.12834.python-list@python.org>
Message-ID: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>

On May 5, 9:22?am, pyt... at bdurham.com wrote:
> I'm looking at rewriting some legacy VB applications and am pondering
> which of the following techniques to use:
>
> 1. Browser based GUI with local web server (Browser +
> wsgiref.simple_server) (I'm assuming that simple_server is class I want
> to build from for a local web server)
>
> -OR-
>
> 2. wxPython based GUI
>
> My thought is that a browser/local web server setup may be more portable
> to mobile environments than wxPython and may offer a way to scale a
> single user offline application to a multi-user online application using
> a remote vs. local web server. Some groups of users may feel more
> comfortable with a browser based interface as well.
>
> I'm looking for feedback from anyone that has pondered the same question
> as well as any pros/cons or tips from anyone that has chosen the
> browser/lcoal web server route.
>
> Thanks,
>
> Malcolm

wxPython is great for desktop applications on Linux, Windows and Mac.
However, there isn't much support for it on mobile platforms at the
moment. If you're thinking your application will be mostly for mobile
environments, then you'll probably want to look at Python web
frameworks, Jython or Silverlight + IronPython (if you want to use
Python on the web).

The most popular Python web frameworks seem to be TurboGears, Django,
Pylons, CherryPy and mod_python.

I know you can run TurboGears, Django and CherryPy locally as well as
with Apache, so they might garner more of your attention.

Mike


From bj_666 at gmx.net  Sat May 24 07:38:58 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 May 2008 11:38:58 GMT
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
	<4r9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <69qd2iF33dagrU6@mid.uni-berlin.de>

On Sat, 24 May 2008 13:13:08 +0200, Johannes Bauer wrote:

> George Sakkis schrieb:
> 
>>> However, this "assignment and comparison" is not working. What's the
>>> "Python way" of doing this kind of thing?
>> 
>> The most obvious and readable of course: use two statements, as one
>> should do regardless of the language, instead of resorting to error-
>> prone hacks.
> 
> As I said in the reply to Carl, this might be okay for if-clauses, but 
> is bothering me with while-loops.

Then try to write the ``while`` loop as ``for`` loop and move the
comparison into a generator function, or use the two argument variant of
`iter()`, or `itertools.takewhile()`.

Ciao,
	Marc 'BlackJack' Rintsch


From marco at sferacarta.com  Tue May  6 10:59:42 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 16:59:42 +0200
Subject: sed to python: replace Q
In-Reply-To: <4820714b$0$34544$742ec2ed@news.sonic.net>
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <Dn_Tj.33642$o06.31061@tornado.fastwebnet.it>

Raymond wrote:

> Aren't sed, awk, grep, and perl the reference implementations of search
> and replace?

I don't know about "reference implementations", but I daresay they are a 
mess w.r.t. usability.



From wolfgang.grafen at ericsson.com  Tue May 13 07:44:27 2008
From: wolfgang.grafen at ericsson.com (Wolfgang Grafen)
Date: Tue, 13 May 2008 13:44:27 +0200
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <g0buur$n69$1@news.al.sw.ericsson.se>

dannywebster at googlemail.com schrieb:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
> 
> so far:
> 
>>>> f=os.open("./get_hostnames").readlines
> 
> returns ['host1 host2 host3 ... hostN\n]'
> 
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
> 
>>>> f=str(f)
>>>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]
> 
> 
> Any help is highly appreciated
> 
untested:
f=" ".join(f)
f.split()

Best regards

Wolfgang


From chris.hulan at gmail.com  Thu May 22 17:45:17 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Thu, 22 May 2008 14:45:17 -0700 (PDT)
Subject: Using os.walk to return files in subdirectories
References: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
Message-ID: <dc2a802a-0164-4b77-8955-57a459606939@i76g2000hsf.googlegroups.com>

On May 22, 5:24 pm, dj <d.a.aberna... at gmail.com> wrote:
...snip...
>      for d in dir:
>         if end == d:
dir is the list of subdirs of the current dir, and the current dir
is NOT a subdir of itself so end == dir is never true

Are you trying to get a list per subdir?

cheers


From castironpi at gmail.com  Sat May 17 22:22:39 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 19:22:39 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<g0mcd2$2qk0$2@news.mtu.ru>
Message-ID: <91d4cf3b-e71f-4e73-90da-db0735f34035@c65g2000hsa.googlegroups.com>

On May 17, 5:35?am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:
> > Full day later, I think it, to emphasize state, would prioritize
> > context. ?The reason for the huge ramble was, believe it or not,
> > namespace conflict... as though any other states around here might nose
> > in. ?And thanks to 'inhahe' for coming back with the question. ?...Which
> > would explain next move to 'prioritize context'. Context is a high
> > priority for people.
>
> > I'm proposing to start on one on a computer. ?The first things a
> > computer 'knows' are the boot, keyboard, & mouse. ?Yet on another scale,
> > the first things it knows are BIOS, file system, and OS. ?On still
> > another, the only thing it knows are interruptions. ?Knowledge is
> > important to context. ?(The scales are ram on disk on, ram on disk off,
> > and ram off, which may tell of the currency they and their power are
> > bought with. ?Thence, we should be getting different values for lengths
> > of time.)
>
> > (Furthermore, we're all on different longitudes -and- latitudes.)
>
> > Context comes from motion, perception, and composite perception
> > (reperception e.a.o. memory). ?There is some reason to believe that
> > motion and sight are different senses, perhaps so with stationary sound
> > (gatcha) and mobile sound too. ?Do you go deaf of a tone after prolonged
> > duration? ?That makes computers valuable commodities*: they have a
> > symbolic interface, which no other unlive objects have. ?They have both
> > mouse and keyboard.
>
> > *I'm sure there is a precision to wants: what magnitude of what types of
> > action a person wants from a day and for a time-- what energy states
> > they go to and from (note phone on come to and come from.)
>
> > Therefore, context should originate in mouse and keyboard.
>
> > Humans have symbolic know-how: knowledge of how to convey intent
> > digitally, though it may be there is no interpolation of 'intent per
> > mouse-or-key', even though people are prone to empathize with faces.
> > However, if you start with a 'me' and a 'no', you can get pretty
> > logical.
>
> > Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> > rationally dimensional (?), though they do have magnitudes per mass and
> > volume. ?The contingent of 'rationally dimensional' is having or
> > beknowing/benouncing an orthonormal basis. ?Incidentally, '''orthography
> > of a language specifies the correct way of using a specific writing
> > system to write the language. .. Orthography is derived from Greek ?????
> > orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
>
> > Further incidentally, context and state may have more important in
> > common than priority and price: privacy and safety are involved ex
> > hypothesi. ?Incidentally = ...
>
> > It is not clear that the first (cheapest best) human-computer language
> > is a computer language, though if two were orthonormal in comparison to
> > life, Python's fine. ?Not my first.
>
> > In privacy concerns, it is not clear that duals aren't primitives to
> > humans. ?What's a brain primitive? ?Lol: what is a primitive brain?
>
> > On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> >> I'm not an expert in this but what does it mean to emphasize state? ?It
> >> seems the opposite of that would be a) functional programming, and b)
> >> passing parameters instead of using global or relatively local
> >> variables. And maybe c) coroutines (generators as implemented in
> >> Python), although perhaps coroutines could be said to emphasize state
> >> inasmuch as they go out of their way to capture, objectify and reuse it
> >> (Stackless' microthreads, even moreso). ?And Python seems to be
> >> well-noted for implementing some functional programming methodology,
> >> and as for passing parameters it's just as object-oriented as the rest
> >> of them.
>
> >> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> >> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> >> > true?- Hide quoted text -
>
> >> - Show quoted text -
>
> Castironpi,
>
> I love you! You remind me of all the kittens and puuppies I had when I
> was a child.
>
> I #define this. Hope your database could give us something funny again.
>
> -- Ivan- Hide quoted text -
>
> - Show quoted text -

I have to talk about crossing threats.  But talking about threads is
like talking, and people talk about food.  What are some threats to be
scared of?  What about threads to be thunder?


From anand.prabhakar.patil at gmail.com  Thu May 29 04:44:13 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 09:44:13 +0100
Subject: code of a function
In-Reply-To: <483E6B8D.6020307@islandtraining.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
	<483E6B8D.6020307@islandtraining.com>
Message-ID: <B63DBB03-1487-4FEB-A6C8-D8731415E924@gmail.com>


On May 29, 2008, at 9:38 AM, Gary Herron wrote:
> Dark Wind wrote:
>> Hi,
>>
>> Is there any command in Python which gives the code for a function  
>> like just typing the name of a function (say svd) in R returns its  
>> code.
>>
>> Thank you
>
> Nope.

If you're using IPython, you can do svd?? .



From java.oke at gmail.com  Thu May  8 17:39:19 2008
From: java.oke at gmail.com (j.oke)
Date: Thu, 8 May 2008 14:39:19 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <0c3c6e48-32cf-4fdd-883e-348f4436a309@y38g2000hsy.googlegroups.com>

xahlee at gmail.com ha scritto:

> [bli bla blo, blu blu bum bum bam bam bim bim bim...]

don't know Y, by your arty-phycial excerptions always seem chinese
me...

-JO


From cwitts at gmail.com  Thu May 15 08:30:57 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 15 May 2008 05:30:57 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
Message-ID: <96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>

On May 15, 2:27?pm, globalrev <skanem... at yahoo.se> wrote:
> i have a big collection of .txt files that i want to open and parse to
> extract information.
>
> is there a library for this or maybe even built in?

os.open to open the files and iterate through it and built in string
functions to parse it.


From gandalf at shopzeus.com  Mon May 19 09:28:36 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 19 May 2008 15:28:36 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
Message-ID: <48318084.5040208@shopzeus.com>


>> I'm trying to write a multi threaded TPC server. I have used xmlrpc
>>     
>
>  How exactly did you come to the conclusion that your server must be
> multi threaded ?
>   
I don't think that it is important. But if you are interested:

- yes, the server will probably be I/O bound, not CPU bound
- I'm have experience with thread programming, but not with twisted

>> - I have to send larger amounts of data, the overhead of converting to
>> XML and parsing XML back would be too much pain
>>     
>
>  - What's the expected amount of data you have to transfer ?
>   
I cannot predict. But I will be trasferring image files which would be 
silly to do with XML.
>  - What's the expected network bandwidth ?
>   
It cannot be determined in advance.
>  - What's the expected acceptable transfer time ?
>   
Not known.
>  - How many users are expected to be transfering data at the same time ?
>   
The server should be scaleable up to hundreds of users. (I'm just trying 
to answer your questions, if that helps to answer mine.)
>  Did you consider gzipping your XML (or YAML) packets ? Would the
> transfer time be acceptable in this case ?
>   
No. "Image binary data -> base64encode -> XML -> gzip" - looks very 
silly. It cannot be efficient. Do you have better ideas?
>> BTW I do not care about the clients - they must trust the server side.
>>     
>
>  Oh, he said he _doesn't care about the clients_ ! ;-)
>   
I meant *safety* here: clients are going to download program updates 
from the server. So if they do not trust the server then they should not 
use it. The server is different: it must be safe against external 
attacks. Maybe it was my bad English? Sorry for the misunderstanding.
>  In general I would avoid that. Try to better estimate the speed
> requirements, to see if you really need do to this.
>   
I cannot predict "acceptable speed" requirements, but I can tell that 
there will be some clients downloading 100MB report files from the 
server, so I presume that I will need a progress bar. I think that I 
need to develop my own protocol for this, and probably the underlying 
layer should use binary representation.
>> Before I start re-inventing the wheel:
>>
>> - Is there another (already existing) higher level framework that I can
>> try? It should be safe and fast, that is the only restriction.
>>     
>
>  There's "Twisted".
>  http://twistedmatrix.com/projects/core/documentation/howto/servers.html
>   
Yes, I tried twisted before and I did not like it. It forces me to 
things that I do not want to do. (I cannot tell what it was - it was two 
years ago.)
>> - Do you think that it is a good idea to use xdrlib? I haven't seen
>> projects using it directly. For me it is like the rotor module was - it
>>     
>
>  It's probably the best way to send binary stuff over the network.
> But, again, I would avoid doing so.
>   
It is NOT the best way. Just to tell one example: big endian / little 
endian integers. Definitely I need some encoding.

(But if you are right and this is the best way, why would you avoid?)

  L




From goldnery at gmail.com  Thu May 29 20:37:53 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 17:37:53 -0700 (PDT)
Subject: As I promised couple of day a go
Message-ID: <2b5359a8-1e3a-46ef-bf24-0162126cc201@26g2000hsk.googlegroups.com>

When we discuss a  global window events. and i wanted to generate
event when the user click on a key out of my application. I promised
that if will found how to do it i'l show you.

I found this article which explain very simply how to hook py width
pyHook lib
http://mindtrove.info/articles/monitoring-global-input-with-pyhook/

now the following code combine between wxpython and phHook. I know
this code probably looks not efficient and unorganized. I'm really new
width this stuff, but it works fine.

before you try it you better install the pyHook from the following
link
http://mindtrove.info/articles/monitoring-global-input-with-pyhook/
*note theirs an image url you would have to edit in order for it to be
work

#!/usr/bin/python

# menu1.py

import wx
import wx.html as html
import pythoncom, pyHook


class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, wx.DefaultPosition,
wx.Size(400, 400))
        self.SetBackgroundColour('#fef9d8')

        panel= wx.Panel(self, -1, style=wx.SIMPLE_BORDER, size=(400,
100));
        aaa= html.HtmlWindow(panel, -1, style=wx.SIMPLE_BORDER,
size=(250, 60))
        aaa.LoadPage('aa.html')
        cnrl=wx.TextCtrl(aaa, 11, '', (20, 20), (120, 20))
        wx.Button(aaa, 12, "Translate", (160, 19))
        self.Bind(wx.EVT_BUTTON, self.OnClick, id=12)
        quite = wx.BitmapButton(panel, 20, wx.Bitmap('py/x.gif'),(370,
0), (20, 20), style=wx.ALIGN_RIGHT )
        self.Bind(wx.EVT_BUTTON, self.Yehuda, id=20)
        self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
        self.SetFocus()
        font1= wx.Font(12, wx.NORMAL, wx.NORMAL, wx.BOLD)
        font2=wx.Font(10, wx.NORMAL, wx.NORMAL, wx.NORMAL)
        text1=wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
style=wx.ALIGN_CENTRE)
        text1.SetFont(font1)
        text2=wx.StaticText(panel, -1, "Peace, By, Good by", (30,
100), style=wx.ALIGN_CENTRE )
        text2.SetFont(font2)
        self.Show()


        self.Centre()

    def Yehuda(self, event):
        self.Hide()
    def OnKeyDown(self, event):
        keycode = event.GetKeyCode()
        if keycode == wx.WXK_ESCAPE:
            ret  = wx.MessageBox('Are you sure to quit?', 'Question',
		wx.YES_NO | wx.NO_DEFAULT, self)
            if ret == wx.YES:
                self.Close()
        event.Skip()
    def OnClick(self,event):
        text1.SetLabel(cnrl.GetValue())

    def OnPaint(self, event):
        dc = wx.PaintDC(frame)
        dc.DrawBitmap(frame.bitmap, 20, 20)



class MyTaskBarIcon(wx.TaskBarIcon):
    def __init__(self, frame):
        wx.TaskBarIcon.__init__(self)

        self.frame = frame

        self.SetIcon(wx.Icon('menu1.png', wx.BITMAP_TYPE_PNG))
        self.Bind(wx.EVT_MENU, self.OnTaskBarActivate, id=1)
        self.Bind(wx.EVT_MENU, self.OnTaskBarDeactivate, id=2)
        self.Bind(wx.EVT_MENU, self.OnTaskBarClose, id=3)
        #self.frame.Bind(wx.EVT_CLOSE, self.OnClose)

    def CreatePopupMenu(self):
        menu = wx.Menu()
        menu.Append(1, 'Show')
        menu.Append(2, 'Hide')
        menu.Append(3, 'Close')
        return menu

    def OnTaskBarClose(self, event):
        self.frame.Close()

    def OnTaskBarActivate(self, event):
        if not self.frame.IsShown():
            self.frame.Show()

    def OnTaskBarDeactivate(self, event):
        if self.frame.IsShown():
            self.frame.Hide()

def OnKeyboardEvent(event):
        global x, frame, frame2
        if event.KeyID ==
162:
            if x==1:
               frame.Close()
               frame2= MyFrame(None, -1,  'frame')
               x=0
            else:
               frame2.Close()
               frame= MyFrame(None, -1,  'frame2')
               x=1

x=1
app = wx.App()
frame = MyFrame(None, -1,  'Babylon')
frame.tskic = MyTaskBarIcon(frame)
frame.Show(True)
app.SetTopWindow(frame)
hm = pyHook.HookManager()
hm.KeyDown = OnKeyboardEvent
hm.HookKeyboard()
pythoncom.PumpMessages()
app.MainLoop()





From george.sakkis at gmail.com  Sat May 31 10:54:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 31 May 2008 07:54:56 -0700 (PDT)
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<m2fxryc2db.fsf@googlemail.com>
Message-ID: <7a41e745-956b-4582-bd61-eac699f1d892@34g2000hsf.googlegroups.com>

On May 31, 4:19?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Cameron <cameronla... at gmail.com> writes:
> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
> > Graham article</a> and he builds an accumuator generator function in
> > the appendix. His looks like this:
>
> > <pre>
> > def foo(n):
> > ? s = [n]
> > ? def bar(i):
> > ? ? s[0] += i
> > ? ? return s[0]
> > ? return bar
> > </pre>
>
> > Why does that work, but not this:
>
> > <pre>
> > def foo(n):
> > ? s = n
> > ? def bar(i):
> > ? ? s += i
> > ? ? return s
> > ? return bar
> > </pre>
>
> Others have explained why, but this looks like "pythonized LISP" to
> me. ?I would rather use a generator function:
>
> def foo(n):
> ? ? while True:
> ? ? ? ? n += yield n
>
> Although the problem is that you can't send it values the first time
> round!
>
> >>> bar = foo('s')
> >>> bar.next()
> 's'
> >>> bar.send('p')
> 'sp'
> >>> bar.send('am')
>
> 'spam'
>
> But:
>
> >>> bar = foo(3)
> >>> bar.send(2)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> TypeError: can't send non-None value to a just-started generator

I find the "pythonized LISP" solution more understandable, even
without the initial next() requirement. YMMV

George


From http  Thu May 29 20:17:58 2008
From: http (Paul Rubin)
Date: 29 May 2008 17:17:58 -0700
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
Message-ID: <7xlk1sbq6h.fsf@ruckus.brouhaha.com>

Kris Kennaway <kris at FreeBSD.org> writes:
> I want to make use of UNIX credential passing on a local domain socket
> to verify the identity of a user connecting to a privileged
> service. However it looks like the socket module doesn't implement
> sendmsg/recvmsg wrappers, and I can't find another module that does
> this either.  Is there something I have missed?

There is a patch for it attached to an RFE in the python bug tracker,
I forget which one.  Try searching for sendmsg or ancillary messages
or SCM_RIGHTS in the tracker.


From wuwei23 at gmail.com  Thu May 29 19:20:49 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 16:20:49 -0700 (PDT)
Subject: code of a function
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com> 
	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org> 
	<RuG%j.37511$3j.21433@trnddc05>
Message-ID: <873d04c4-c902-4ed5-8c57-8af8c037f094@c19g2000prf.googlegroups.com>

On May 30, 8:54 am, Alan Isaac <ais... at american.edu> wrote:
> Anand Patil wrote:
> > If you're using IPython, you can do svd?? .
>
> http://www.scipy.org/doc/numpy_api_docs/numpy.linalg.linalg.html
>
> hth,
> Alan Isaac

That wasn't a question :) In IPython, '<entity>?' is roughly
equivalent to 'help(<entity>)', whereas '<entity>??' displays the
code, if possible:

IPython 0.8.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints
more.

In [1]: from functools import wraps

In [2]: wraps??
Type:           function
Base Class:     <type 'function'>
String Form:    <function wraps at 0x00CF31B0>
Namespace:      Interactive
File:           c:\python25\lib\functools.py
Definition:     wraps(wrapped, assigned=('__module__', '__name__',
'__doc__'), updated=('__dict__',))
Source:
def wraps(wrapped,
          assigned = WRAPPER_ASSIGNMENTS,
          updated = WRAPPER_UPDATES):
    """Decorator factory to apply update_wrapper() to a wrapper
function

       Returns a decorator that invokes update_wrapper() with the
decorated
       function as the wrapper argument and the arguments to wraps()
as the
       remaining arguments. Default arguments are as for
update_wrapper().
       This is a convenience function to simplify applying partial()
to
       update_wrapper().
    """
    return partial(update_wrapper, wrapped=wrapped,
                   assigned=assigned, updated=updated)

Which is very handy, like most of IPython.


From tjreedy at udel.edu  Sun May 11 16:14:29 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 16:14:29 -0400
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
Message-ID: <g07k34$339$1@ger.gmane.org>


"XLiIV" <Tymoteusz.Jankowski at gmail.com> wrote in message 
news:41078222-aec0-4e8b-8a1f-945cdf814498 at m73g2000hsh.googlegroups.com...
On May 11, 4:19 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

|The range() function returns a list and list is a sequence, isn't?

yes, for loops iterate thru any iterable 





From skanemupp at yahoo.se  Fri May  2 13:03:47 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 10:03:47 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
Message-ID: <8f3fead6-895a-4ee4-9fff-2190775da3e9@w7g2000hsa.googlegroups.com>

print pygame.K_a displays 97 btw. what does that mean? i though it
would return true or false or 0 or 1.


From deets at nospam.web.de  Fri May 30 12:03:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 18:03:54 +0200
Subject: running on WinPC + comunication via USB
In-Reply-To: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>
References: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>
Message-ID: <6aamrhF16ulv6U1@mid.uni-berlin.de>

martin.nkm at googlemail.com schrieb:
> Hello, I have two questions.
> 1/ If I want to use Python and let my WinPC communicate via RS-232
> with external embedded computer I know there is a pyserial module,
> which I can use it. But what will happen if I want to replace RS-232
> by USB? I know I can have virtual COM port, but all the configuration
> parameters basically refer to RS-232 parameters - baudrate, bits,
> stopbits, parity. In case of USB that's a nonsense I think. Does
> anybody know?

Depending on the setup - no, it's the exact same thing. If e.g. the 
usb-device is a usb2serial converter or otherwise offers it's serveces 
as a serial-like device, it should work.

Additionally, there is libusb + a python-wrapping for that.

> 2/ Second is a basic question. Do I need also cygwin running on my
> Windows PC to get running Python scripts? Or is that Python
> interpreter (Win executable) self efficient? Thanks.

No cygwin needed. In fact you need to be careful *not* to mix python and 
cygwin-python. They can happily co-exist - but installing 
3rd-party-packages for one doesn't imply they are available for the other.

Diez


From castironpi at gmail.com  Wed May 14 11:31:14 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 08:31:14 -0700 (PDT)
Subject: pretty generic question
Message-ID: <3561bbab-6335-4074-9cd3-c3e3b05df195@34g2000hsf.googlegroups.com>

I have to talk about coding.  I'm thinking about traffic, freight,
scheduling, microcontrols, and acoustics.  I have pretty basics
understandings of the controls of computers.

My knowledge is a little contrary or rare; I specialize in information
interfaces, but they're not very expensive to copy, i.e. to look at
again.  I am capable of drawing marginal distinctions from the world
in to code.

My specialty does provide a resource for library design for further
information systems.


From python at bc90021.net  Sun May 11 13:10:14 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:10:14 GMT
Subject: File Creation Not Working In A Thread Class?
Message-ID: <WLFVj.32499$KJ1.2751@newsfe19.lga>

Hi All,

Thanks in advance for any and all help!

I have this code:

g = open(fileName, 'a')

where fileName is defined before the line it's used in.  It works fine 
when I use it outside a thread class.

When I put the same line in a thread class, it no longer works, and I get 
an error:

IOError: [Errno 2] no such file u'fileName'

Are threads not allowed to create files?


From d3vvnull at gmail.com  Thu May 22 23:13:54 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 22 May 2008 22:13:54 -0500
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <170543c70805222013x3fad3096q5bca73874ee6631e@mail.gmail.com>

In fact, the Pylons web framework is geared toward the MVC approach.
http://pylonshq.com/

On Thu, May 22, 2008 at 7:48 PM, George Maggessy <george.maggessy at gmail.com>
wrote:

> Hi Gurus,
>
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?
>
> Cheers,
> George
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From vivainio at gmail.com  Sun May 11 16:28:57 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 20:28:57 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <87iqxkwpo4.fsf@gmail.com>

bc90021 <python at bc90021.net> writes:


> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

Typically, when you report an error message, it helps to paste the
whole traceback. For example, it may be that you are seeing an error
from an old version of the file that has quotes around tempfileName,
or the error is coming from somewhere else.

But to answer your original question: no, there are no problems with
threading and files, and this is just simple human mistake somewhere.


From larry.bates at websafe.com`  Thu May 22 19:14:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 18:14:35 -0500
Subject: ctypes help
In-Reply-To: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
Message-ID: <JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>

gianluca wrote:
> Hy,
> I need help about use dll with ctypes. I've compiled my dll C library
> and I copied it in c:\windows\system32. When I load it with
> "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> python don't see the dll function. with dir(myDLL) I've only this:
> ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> '_name']
> 
> Could anybody help me
> 
> Thanks
> 
> Gianluca

Since it isn't python, dir can'd do much introspection on the object to produce 
the type of output you desire.  You have to know the functions (methods) that 
you want to call in your dll and call them.

-Larry Bates


From vlastimil.brom at gmail.com  Mon May  5 08:59:30 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Mon, 5 May 2008 14:59:30 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
Message-ID: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>

>
>
> Thanks for further comments David,

You are right, the choice of an appropriate data structure isn't easy; I
described the requirements in an earlier post:
http://mail.python.org/pipermail/python-list/2007-December/469506.html

Here is a slightly modified sample of the text source I currently use in my
present (ad hoc and quite dirty) code:

<KC 12><KNJ 13><VCC 0><VN rn_1_vers_1><FN 21rb><b>Wi den L...n
<VN rn_2_vers_1>m...k gein den P<u>ra</u>gern.</b>

<VNJ 1><VCC 1><VN 1>Wen dy h<u>er</u> czu T... vf dy vient
<VNJ 2><VCC 2><VN 2>w<u>er</u>n gesampt czu h<u>er</u>tin strit,
<VNJ 3><VN 3>dez m...s vs gein obint
<VNJ 4><VCC 3><VN 4>W... stunt s...t.
<VNJ 5><VCC 3><VN 5>Doch gar Sthir czu em kam,
<VNJ 6><VCC 5><VN 6>h...g W... sich ken em nom.
<VNJ 7><VCC 6><VN 7>Ez irgink ubil den L...:
<VNJ 8><VCC 7><VN 8>S... slug W...u<u>m</u> daz houbt ab vil gern.
<VNJ 9><VN 9>Den P<u>ra</u>g<u>er</u>n mochtin dy L...n<u>er</u> nit intken,
<VNJ 10><VCC 8><VN 10>si slugin si, das si plutis hin runnen.

<VNJ 00><VCC 9><VN _rn_1_vers_11><b>Wi de<u>m</u> Stracka geschach,
<VN rn_2_vers_11>du er do heim sin husf<u>ro</u>win sach.</b>

<VNJ 11><VCC 9><VN 11>Aus allin L...t<u>er</u>n ein<u>er</u> hin quom,
<VNJ 12><VCC 10><VN 12><FN 21va>der waz S...<u>ra</u>ka gna<u>n</u>t mit
de<u>m</u> nom.
<VNJ 13><VCC 11><VN 13>Em ein vetil den rat gab, ...

========================================
The corresponding data stored as a dict  look like the following dict (here
sorted, at least on the highest level):
(<u>, <i>, <b> ... are ignored here, these are used for the text formatting
for the gui and aren't retrieved any more)

{0: {u'KC': u'12', u'VCC': u'0', u'KNJ': u'13', u'FN': u'21rb', u'VN':
u'rn_1_vers_1'},
13: {u'KC': u'12', u'VCC': u'0', u'KNJ': u'13', u'VN': u'rn_2_vers_1',
u'FN': u'21rb'},
39: {u'KC': u'12', u'VCC': u'1', u'KNJ': u'13', u'VN': u'1', u'VNJ': u'1',
u'FN': u'21rb'},
71: {u'KC': u'12', u'VCC': u'2', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'2', u'VN': u'2'},
102: {u'KC': u'12', u'VCC': u'2', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'3', u'VN': u'3'},
126: {u'KC': u'12', u'VCC': u'3', u'KNJ': u'13', u'VN': u'4', u'VNJ': u'4',
u'FN': u'21rb'},
144: {u'KC': u'12', u'VCC': u'3', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'5', u'VN': u'5'},
171: {u'KC': u'12', u'VCC': u'5', u'KNJ': u'13', u'VN': u'6', u'VNJ': u'6',
u'FN': u'21rb'},
199: {u'KC': u'12', u'VCC': u'6', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'7', u'VN': u'7'},
224: {u'KC': u'12', u'VCC': u'7', u'KNJ': u'13', u'VN': u'8', u'VNJ': u'8',
u'FN': u'21rb'},
264: {u'KC': u'12', u'VCC': u'7', u'KNJ': u'13', u'VN': u'9', u'VNJ': u'9',
u'FN': u'21rb'},
307: {u'KC': u'12', u'VCC': u'8', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'10', u'VN': u'10'},
348: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'VN': u'_rn_1_vers_11',
u'VNJ': u'00', u'FN': u'21rb'},
373: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'FN': u'21rb', u'VNJ':
u'00', u'VN': u'rn_2_vers_11'},
409: {u'KC': u'12', u'VCC': u'9', u'KNJ': u'13', u'VN': u'11', u'VNJ':
u'11', u'FN': u'21rb'},
444: {u'KC': u'12', u'VCC': u'10', u'KNJ': u'13', u'VN': u'12', u'VNJ':
u'12', u'FN': u'21va'},
480: {u'KC': u'12', u'VCC': u'11', u'KNJ': u'13', u'FN': u'21va', u'VNJ':
u'13', u'VN': u'13'}}

The keys are indices of the places in text, where the
value of some tag/property ... changes; also the not changing values are copied
in the inner dicts, hence after determining the index of the first such
"boundary" preceeding the given text position (using bisect), the
complete parameters can be retrieved with a single dict lookup.
The other way seems much more complicated with this dict
structure. I.e. it should be possible to find the index/or all
indices/or the lowest index given some combinations of tag values - e.g.
with the input: u'FN': u'21va' >> 444 should  be found (as the lowest index
with this value)
for u'KC': u'12' AND u'VN': u'3' >> 102
(there are of course several other combinations to search for)
I couldn't find an effective way to lookup the specific values of the inner
dict (other than nested loops), probably using a set of tuples instead the
inner dict would allow the checks for intersection with the input data, but
this also seems quite expensive, as it requires the loop with checks over
the entire data ... the same would probably be true for multiple reversed
dicts keyed on the tags and containing the indices and the
corresponding values (but I actually haven't  tested the latter two
approaches).

The approach with sqlite I'm testing now simply contains columns for all
relevant "tags" plus a column for text index; this way I find it quite easy
to query the needed information in both directions (index >> tags; tag(s) >>
index/indices) with the db selects - even as a beginner with SQL.

The exact set of tags will be complete with the availability of all
texts, then the gui will be adapted to make the user selections available
(comboboxes). The searches are restricted
to the predefined "properties", they are not manually queried.
With the dynamic building of the db I just
tried, not to hardcode all the tags, but it would be later
possible to create the database tables and columns also in a
controlled "static" way.

Comparing the two versions I have, the dictionary approach really seems
quite a bit more complicated (the data as well as the functions for the
retrieval), than the sqlite3 version.

For this app I really actually don't need a persistent db, nor should it be
shared etc. The only used thing are the efficient lookup possibilities,
which seemed to do what I needed (simply using intersect selects). Are there
any ways how to implements this efficiently using the python builtin types?

Greetings,
   Vlasta
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From mensanator at aol.com  Wed May  7 16:31:06 2008
From: mensanator at aol.com (Mensanator)
Date: Wed, 7 May 2008 13:31:06 -0700 (PDT)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <021f52a9-4d18-4e0a-acdd-3a08cca4a4e5@z72g2000hsb.googlegroups.com>

On May 7, 3:13?pm, dmitrey <dmitrey.kros... at scipy.org> wrote:
> hi all,
> could you inform how to print binary number?
> I.e. something like
>
> print '%b' % my_number
>
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
>
> Thank you in advance, D

The gmpy works good.

>>> import gmpy
>>> print gmpy.digits(66,2).zfill(8)
01000010


From bellman at lysator.liu.se  Tue May 20 07:04:58 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 11:04:58 +0000 (UTC)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
Message-ID: <g0ub8q$f8n$1@news.lysator.liu.se>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> bearophileHUGS at lycos.com wrote:

>> The Example 2 builds a list, that is then thrown away. It's just a
>> waste of memory (and time).

> No, it doesn't. It uses append because it refers to itself in the
> if-expression. So the append(c) is needed - and thus the assignment
> possible but essentially useless.

Yes it does.  A list comprehension *always* creates a list.  In
this case it will be a list of None, since that is what list.append()
returns.  See this:

    >>> new=[]
    >>> s="This is a foolish use of list comprehensions"
    >>> [ new.append(c) for c in s if c not in new ]
    [None, None, None, None, None, None, None, None, None, None, None,
     None, None, None, None, None, None]

Yes, you do get a correct result in 'new', but you *also* create
a 17 long list with all elements set to None, that is immediately
thrown away.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"I refuse to have a battle of wits with an   !  bellman @ lysator.liu.se
 unarmed person."                            !  Make Love -- Nicht Wahr!


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:06:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:06:00 -0300
Subject: feedparser
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>
Message-ID: <op.ua3agakbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:30:44 -0300, Mike <42flicks at gmail.com> escribi?:

> I'm trying to use the feedparser module (http://www.feedparser.org/).
>
> Is it possible to use this without running the setup program?
>
> I don't see why not, seems like I'm missing something obvious.
>
> My directory structure is:
>
> myprogram.py
>     /feedparser
>         /feedparser.py
>
> I know I can install the module in the modules directory but would like  
> to
> avoid this for two reasons: I'm only using it for the one project so  
> would
> like to keep it seperate, and if I move to a shared host I may not be
> allowed to install additional modules (not sure if this is correct  
> though).

The easiest way would be to put the single module feedparser.py in the  
same directory as your program (I don't  completely get your reasons not  
to do that). OR put feedparser.py in some other directory that is already  
listed in sys.path. OR add the directory containing feedparser.py to  
sys.path, just at the beginning of your program.

> I've tried:
>
> import feedparser
>
> import feedparser.feedparser
>
> from feedparser import feedparser
>
> What am I doing wrong? :)

*IF* the directory 'feedparser' were a package (that is, if it contained a  
file __init__.py), then that last import statement would be valid. But I  
don't reccomend doing this; you're changing the module's environment.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:50:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:50:30 +0200
Subject: Python is slow
In-Reply-To: <g14rk0$4pf$1@solaris.cc.vt.edu>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
Message-ID: <4836772e$0$6097$426a74cc@news.free.fr>

Brad a ?crit :
> cm_gui wrote:
>> Python is slow.
> 
> It ain't C++, but it ain't a punch card either... somewhere in between. 
> I find it suitable for lots of stuff. I use C++ when performance really 
> matters tho... right tool for the job. Learn a good interpreted language 
> (Pyhton) and a good compiled language (C or C++) 

LordHaveMercy(tm). Could you guys please learn what you're talking about?

1/ being interpreted or compiled (for whatever definition of these
terms) is not a property of a language, but a property of an
implementation of a language.

2/ actually, all known Python implementations compile to byte-code.


> and you'll be just 
> fine. Until then, quit bitching.


From mail at timgolden.me.uk  Thu May 29 04:10:51 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:10:51 +0100
Subject: How to get all the variables in a python shell
In-Reply-To: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <483E650B.5060902@timgolden.me.uk>

lixinyi.23 at gmail.com wrote:
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
> 
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
> 
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

I stronly suggest you look at IPython [1]. To do what I think
you're describing, you'd need to hack or reimplement the interpreter.
And that's what they've done. ISTR that they even have a branch
which is dealing with parallel instances.

TJG

[1] http://ipython.scipy.org/moin/


From detlev at die-offenbachs.de  Sun May 18 09:48:33 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 18 May 2008 15:48:33 +0200
Subject: howto use pylint from Eric IDE?
References: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>
Message-ID: <g0pc3h$jgk$1@online.de>

dmitrey wrote:

> Hi all,
> 
> I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
> cannot find how to use pylint from Eric IDE GUI.
> Does anyone know?
> 
> Thank you in advance, D.

Project->Check->Run PyLint

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From miller.paul.w at gmail.com  Sun May 25 19:56:58 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 16:56:58 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<7xskw69cuc.fsf@ruckus.brouhaha.com>
Message-ID: <e1285efd-c0d5-486f-9cb0-71216bc5a1ef@e39g2000hsf.googlegroups.com>

On May 25, 7:35?pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> miller.pau... at gmail.com writes:

Thanks for your reply.  I guess I'll have to go source diving to truly
answer the question.

> "You can fix your Python program's performance problems by rewriting
> it in C" is not that convincing an answer to a concern that Python is
> slow ;-).

Wasn't meant to be.  But, it is a credit to Guido that, beyond the
pain inherent in coding in C, there's relatively little pain involved
in writing an extension module.


From pavlovevidence at gmail.com  Sun May  4 14:25:36 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 4 May 2008 11:25:36 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org> 
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com> 
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com> 
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
Message-ID: <da8e56f6-ea23-4df2-b17b-e6aff050e36c@r66g2000hsg.googlegroups.com>

On May 4, 2:13 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> However, what I said was not wholly untrue: code in C extensions is
> protected by the GIL and thus not interruptable, unless it either
> releases the GIL, or calls back into Python code (which is apparently
> what numpy scalars do).

And, because I know that someone will be nitpicky: yes, technically it
is interruptable at that point, but other Python threads trying to
execute the same piece of code are not allowed to run.


>     print 'final count:', count

This should be "int(count)".


Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:41:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:41:34 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <fvunsh$jjm$1@aioe.org>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
Message-ID: <48240e3e$0$30967$426a34cc@news.free.fr>

pistacchio a ?crit :
(snip)
> Technically speaking, it (Python) is not, for example, strongly 
> typed, 

You're confusing "strong" typing with static typing. Somewhat orthogonal 
issues.


From s0suk3 at gmail.com  Mon May  5 01:06:42 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 22:06:42 -0700 (PDT)
Subject: Truncate beginning of a file
Message-ID: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>

file.truncate(X) will truncate the file to at most X bytes (i.e. leave
the first X bytes of the file and throw away the rest). Is there a way
to throw away, say, the first X bytes of the file, and leave the rest?
(Without opening the same file for reading, reading and processing,
overwriting the file with the new processed data, etc.)


From Lie.1296 at gmail.com  Sun May 25 13:37:01 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:37:01 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
Message-ID: <37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>

On May 22, 12:28?pm, NC <n... at iname.com> wrote:
> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>
>
>
> > So, here's my delimna: I want to start a blog. ?Yeah, who doesn't.
> > Yet, I want learn the guts of it instead of just booting up some
> > wordwank or whatever.
>
> Here's a simple computation to consider... ?WordPress' codebase is
> approximately a megabyte of PHP code and megabyte of JavaScript code.
> Assuming that the average line of that code is 50 characters long, you
> are looking at 20,000 lines of code in PHP and as many in JavaScript.
> Based on the notion that the average developer out there writes 100
> lines a day, either you're in for a two-year project or your product
> is going to have seriously reduced functionality compared to something
> that's been freely available for years. ?What's your choice?

Nope, the core functionality of a blogging software could be
replicated in just a few lines of PHP codes, in the range of tens to
hundreds of lines. If you're creating your own blogging software, you
wouldn't seriously think you'd recreate all those things such as
pingbacks, commenting system, etc, etc, etc. No, you'd start with some
basic core functionalities: a few simple server side includes only.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:36:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:36:36 +0200
Subject: Bad form to access a *private variable* like _foo?
In-Reply-To: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
Message-ID: <48200a7f$0$23642$426a74cc@news.free.fr>

seberino at spawar.navy.mil a ?crit :
> Bad form to access a *private variable* like _foo?

In this case, this would be spelled "protected" - or even better 
"implementation". And the contract is: nothing prevent you to access 
implementation attributes, but then you're on your own if anything breaks.

> The reason I'm asking is that TurboGears/SQLObject mobel objects have
> an attribute called "_connection" that must be used to manually commit
> database stuff....
> 
> e.g.  MyObject._connection.commit()
> 
> It bugs me.  I don't know if it is a stylistic faux pas or not.
 >
> Is it?

The way you wrote it here, yes. If there's no official way to do the 
same operation and you have a real use case for it - in which case you 
may want to add a commit() method to SQLObject's model base class and 
submit the patch to SQLObject's maintainer. But I strongly suspect 
there's a better way to handle this case in SQLObject's API.




From basti.wiesner at gmx.net  Sat May 31 15:40:46 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 21:40:46 +0200
Subject: parse dates
References: <0f58a4f7-ba18-4f83-9291-12bc844a37a0@p25g2000hsf.googlegroups.com>
Message-ID: <g1s9k7$9iu$01$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ brechmos <brechmos at gmail.com> ]

> Hi,
> 
> I have been using PHP the last while and in particular strtotime.
> What I want to replicate is finding the second or fourth Monday of the
> next month.  In PHP with strtotime it is easy (strtotime("second
> Monday", strtotime("next month"), but I can't find an easy way to do
> it in Python.  I have seen DateUtil, but it seems to be able to do
> only the simpler parsing (could be wrong).
> 
> Any other ideas?

If parsing is not required, dateutil is just fine:

from datetime import datetime
from dateutil import relativedelta

# second monday
datetime.now() + relativedelta.relativedelta(day=1, weekday=relativedelta.MO(+2))

# next month
datetime.now() + relativedelta.relativedelta(months=+1)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkhBqcMACgkQn3IEGILecb7FXgCgg1X7vrP/uzTaPa5W3e2WsDFV
e5kAnizMQUDLfz07Z/d1hVehlCmoJuKl
=yi9t
-----END PGP SIGNATURE-----


From inhahe at gmail.com  Fri May 16 11:21:39 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 11:21:39 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
Message-ID: <wChXj.4859$Kk3.3020@bignews9.bellsouth.net>

You could be right, but here are my reasons.

I need to make something that's very CPU-intensive and as fast as possible. 
The faster, the better, and if it's not fast enough it won't even work.

They say that the C++ optimizer can usually optimize better than a person 
coding in assembler by hand can, but I just can't believe that, at least for 
me, because when I code in assembler, I feel like I can see the best way to 
do it and I just can't imagine AI would even be smart enough to do it that 
way...

For portability, I'd simply write different asm routines for different 
systems.  How wide a variety of systems I'd support I don't know.  As a bare 
minimum, 32-bit x86, 64-bit x86, and one or more of their available forms of 
SIMD.






"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:mailman.1229.1210949533.12834.python-list at python.org...
> On Fri, 16 May 2008 10:13:04 -0400
> "inhahe" <inhahe at gmail.com> wrote:
>> Can anyone give me pointers/instructions/a template for writing a Python
>> extension in assembly (or better, HLA)?
>
> I am trying to imagine the requirements document for your project.
>
> - Must be error prone and hard to debug
> - Must take an order of magnitude longer to write
> - Must be unportable to other systems
>
> Really, why don't you write your etension in C?  Do you really think
> you will improve your code by writing it in assembler?  Even embedding
> assembler in C code make it unportable and I find it hard to imagine
> anything that you want to do in a Python context that can't be done at
> least as well in C if not pure Python.
>
> Just curious is all.
>
> -- 
> D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
> http://www.druid.net/darcy/                |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner. 




From mnikhil at gmail.com  Wed May 21 20:37:49 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 22 May 2008 06:07:49 +0530
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>
Message-ID: <4834C05D.6020608@gmail.com>

bukzor wrote:
> On May 21, 5:10 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
>> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>>
>>> what are the simple ways?
>>> I could think of os.open(), os.exec(touch file)
>>> are there any simpler methods?
>> Just use os.path.exists to check for file existence and open() as
>> replacement for touch.
>>
>>>>> import os
>>>>> if not os.path.exists('file'):
>> ...     open('file', 'w').close()
>> ...
>>
>>
>>
>> --- Giampaolohttp://code.google.com/p/pyftpdlib/
> 
> As simple as it gets is a single builtin function call:
> 
> open("somefile.txt", "a")
> 
> Leave out the ,"a" if you don't mind blanking a pre-existing file.
Thanks :-)

That reminds me to check if I could quickly nullify a file if it exists

if os.path.exists('file'):
	open('file', 'w').close()

Right?


From yves at zioup.com  Fri May 23 01:07:57 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 05:07:57 GMT
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
Message-ID: <NisZj.288476$pM4.73650@pd7urf1no>

Peter Otten <__peter__ at web.de> wrote:

> > A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with
> > list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip"
> > to do so?

> >>> items = [None] * 6
> >>> items[::2] = 1,2,3
> >>> items[1::2] = 4,5,6
> >>> items
> [1, 4, 2, 5, 3, 6]

My problem with this solution is that you depend on knowing how many
elements you have in each list ahead of time. Assuming that both list
are of the same length, then, I find the following more elegant:

list1=[1,2,3]
list2=[4,5,6]

reduce(lambda x, y: x+y, zip(list1, list2))

of course, zip creates tuples, so you end up with a tuple, therefore if
you need for your solution to be a list:
list(reduce(lambda x, y: x+y, zip(list1, list2)))
of
reduce(lambda x, y: x+y, list(zip(list1, list2)) )


Yves.
http://www.SollerS.ca



From kyosohma at gmail.com  Fri May 23 12:25:28 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 09:25:28 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
Message-ID: <5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com>

On May 23, 10:45?am, Gandalf <goldn... at gmail.com> wrote:
> How can i bind function that handle the mouse clicking ?window X event
> or clicking alt+F4
>
> thanks

You really need to learn to ask good questions. Unless people dive
into your previous posts, they won't know what Python GUI toolkit you
are using, which version of said toolkit, which Python or which OS.

Here's a good place to read about events in general:

http://wiki.wxpython.org/EventPropagation

If you use Google, you can look for the close event, which gives you
this:

http://www.wxpython.org/docs/api/wx.CloseEvent-class.html

So you'll want to bind your frame to EVT_CLOSE. You can disable the
"X" in your frame's window by using non-standard style parameters.

Mike


From rocky at panix.com  Wed May 21 11:39:01 2008
From: rocky at panix.com (R. Bernstein)
Date: Wed, 21 May 2008 11:39:01 -0400
Subject: Possibly pydb 1.23 release around May 30
Message-ID: <wihskwb8y5m.fsf@panix5.panix.com>

A release of pydb (1.23) is currently scheduled for around May
30th. If you can and want to help make sure the release is okay, you can try out what is currently in CVS: 
   http://sourceforge.net/cvs/?group_id=61395

I've put an interim tar at http://bashdb.sf.net/pydb-1.23cvs.tar.gz

Changes in the upgoming release:

* Show parameters on call

* Some doc fixes.

* add ipython and python commands to go into an ipython or a python shell

* add "save" command to save the current breakpoints and/or 
  most settings to a file. (Suggested at a NYC Python group meeting)

* add set/show "deftrace" to allow stopping at a def (method creation)
  statement.

* pseudo gdb-like "annotate" set/show commands and option.

* Better emacs interactivion via above annotate

* bug when "info local" is run inside a "with" statement

  Fixes for last three items based patches by Alberto Griggio



From castironpi at gmail.com  Thu May 15 22:43:04 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:43:04 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
	<37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com> 
	<e717c110-7544-4028-89c4-b37efdd7d61d@a23g2000hsc.googlegroups.com>
Message-ID: <223ab3fc-cb1f-4765-8f27-50f1487c19a3@b1g2000hsg.googlegroups.com>

On May 15, 9:30?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:27?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > > > >> I'm cleaning up some old code, and want to see what orphan
> > > > >> functions might be sitting around.
>
> > > > >> Is there a static call tree analyzer for python?
>
> > > > > How about
> > > > >http://pycallgraph.slowchop.com/
>
> > > > > ...
> > > > > Jay Graves
> > > > > --
> > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > Have you checked to see if PyChecker or pylint can help you?
> > > > Apparently they can find unused variables at least, I don't know
> > > > whether they do functions or not.
>
> > > I think of dynamic programming and dynamic code, but voice. ?Does that
> > > mean sing about it?- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have to write a song. ?Somebody?- Hide quoted text -
>
> > - Show quoted text -
>
> Sorry for the frequent posts: I think I have to write a noise about
> train cars crossing rail, putting numbers on frequencies, and send
> code. ?Train whistles are pretty good too. ?I believe those are the
> ones that start to go on keystrokes. ?I'd try to compare differences
> between those and bowling pins. ?A couple others are coins clinking
> and poker chips. ?Generally speaking, tapping metals and glass.- Hide quoted text -
>
> - Show quoted text -

I also have to apologize for my manners.  This had nothing to do with
'call tree tool', which I neglected to consider.  It sounds teriffic
but I think something about Python makes it unfeasible or inadvisable
to visualize them.  It's naturally possible it has something to do
with the fact that the screen's in two dimensions relative to time,
which incidentally some rel. dbs. could use in expressiveness, it's
just that it has to come on the dollar since 'is' is often relative
to, and comes with verbs.

In per Python, you'd have to be wanting to visualize that breadth of
information to be wanting to spiral call trees on to screen.


From wolfgang.lipp at gmail.com  Sat May 24 06:04:14 2008
From: wolfgang.lipp at gmail.com (_wolf)
Date: Sat, 24 May 2008 03:04:14 -0700 (PDT)
Subject: image scaling in cairo, python
Message-ID: <a6aa3014-1f46-43f4-bd08-1a8a4c3d4aad@x41g2000hsb.googlegroups.com>

[also posted to: cairo at cairographics.org]

hi all,

i've heard cairo has become the image scling library for firefox3. is
that true? wonderful, i want to do that in python. there's a python
interface for cairo, right? i've used it before to do simple vector
stuff. seems to work. however, i haven't been able to find relevant
pointers via google.

so do you have any pointers on how to resize a raster image with
python using cairo? i've been jumping through hoops for a while now,
and i believe it should be easier.

cheers and ~flow

ps. related (long) posts:

http://groups.google.com/group/pyglet-users/browse_frm/thread/44253ad01d809da5/cd051e6bced271e1#cd051e6bced271e1

http://groups.google.com/group/comp.lang.python/browse_frm/thread/5df65d99cff0d7bb#


From yves at zioup.com  Mon May 12 23:18:32 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:18:32 GMT
Subject: anonymous assignment
In-Reply-To: <mailman.975.1210588838.12834.python-list@python.org>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>
	<mailman.975.1210588838.12834.python-list@python.org>
Message-ID: <cM7Wj.264425$pM4.71972@pd7urf1no>

Gabriel Genellina wrote:
>> Uses Python 2.6! ;)
>>
> 
> No need of 2.6 - the above code works since Python 2.2 at least:
> 
> Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import time
>>>> t=time.localtime()
>>>> type(t)
> <type 'time.struct_time'>
>>>> t.tm_year
> 2008
> 
> (but struct_time objects were printed as regular tuples)
> 

And not well documented !

Nice one ! Thanks.


From iainking at gmail.com  Wed May 14 11:08:51 2008
From: iainking at gmail.com (Iain King)
Date: Wed, 14 May 2008 08:08:51 -0700 (PDT)
Subject: Rename field in Access DB
Message-ID: <b57c36ea-dcda-4bd2-bcc4-883b16663eea@a70g2000hsh.googlegroups.com>

I'm manipulating an MS Access db via ADODB with win32com.client.  I
want to rename a field within a table, but I don't know how to.  I
assume there is a line of SQL which will do it, but nothing I've tried
(from searching) has worked.
Basic code:

import win32com.client
connection = win32com.client.Dispatch(r'ADODB.Connection')
DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
connection.Open(DSN)
connection.Execute("ALTER TABLE tablename CHANGE from to")   #this sql
doesn't work
connection.Close()

Anyone know how to get this to work?

Iain


From castironpi at gmail.com  Fri May 16 14:01:16 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 11:01:16 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com> 
	<YOSdndykxtsMLbDVnZ2dnUVZ8s_inZ2d@posted.plusnet>
Message-ID: <a0836e62-922a-4836-a002-4da8ae2d7c08@m3g2000hsc.googlegroups.com>

On May 16, 10:45?am, Ant <ant... at gmail.com> wrote:
> Hi Paul,
>
> > LineStart *really* wants to be parsed at the beginning of a line.
> > Your textline reads up to but not including the LineEnd. ?Try making
> > these changes.
>
> > 1. Change textline to:
>
> > ? ? ?textline = pp.Combine(
> > ? ? ? ? pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
> > \
> > ? ? ? ? pp.LineEnd().suppress()
>
> Ah - so restOfLine excludes the actual line ending does it?
>
> > 2. Change comb to:
>
> > ? ? comb = head + parser
>
> Yes - I'd got this originally. I added the garbage to try to fix the
> problem and forgot to take it back out! Thanks for the advice - it works
> ? fine now, and will provide a base for extending the list format.
>
> Thanks,
>
> Ant...

There is a possibility that spirals can come from doubles, which could
be non-trivially useful, in par. in the Java library.  I won't see a
cent.  Can anyone start a thread to spin letters, and see what the
team looks like?  I want to animate spinners.  It's across
dimensions.  (per something.)  Swipe a cross in a fluid.  I'm draw
crosses.  Animate cubes to draw crosses.  I.e. swipe them.



From lac at openend.se  Tue May 27 09:08:42 2008
From: lac at openend.se (Laura Creighton)
Date: Tue, 27 May 2008 15:08:42 +0200
Subject: looking for membership management software -- Open Source,
	written in Python 
In-Reply-To: Message from miller.paul.w@gmail.com of "Mon,
	26 May 2008 12:18:47 PDT."
	<014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>
References: <mailman.1613.1211812586.12834.python-list@python.org>
	<014354fc-991d-4b56-99fb-5bebabd1ec79@59g2000hsb.googlegroups.com>
Message-ID: <200805271308.m4RD8gXP018239@theraft.openend.se>

In a message of Mon, 26 May 2008 12:18:47 PDT, miller.paul.w at gmail.com writes:
>On May 26, 10:36?am, Laura Creighton <l... at openend.se> wrote:
>> I'm looking for an application that handles the membership of an
>> organisation -- who's a member, who has paid fees, addressbook and
>> the odd added field.
>>
>> Anybody got one they recommend?
>>
>
>It sounds like you essentially need a specialized database and an app
>to query the database.  If this is a small organization (under 100
>people, say), then the simplest solution would probably be a simple
>spreadsheet.  Otherwise, maybe something like Organizers' Database
>(http://www.organizersdb.org/) would do the trick.

We're bigger than this, and are very much in the 'we are way too big to
be a spreadsheet any more' phase.

>I haven't actually used this software, but it looks like it's made to
>do exactly what you want to do.

Indeed, but being powered by Drupal makes it a PHP system, and
I don't think I can get our security guys to go for that.  And it
only runs on windows; they're not going to be happy about that either.

>Hope that helps!

Yes, it did.  Thank you very much,

Laura

>
>--
>http://mail.python.org/mailman/listinfo/python-list


From marko.srepfler at gmail.com  Fri May 23 04:40:26 2008
From: marko.srepfler at gmail.com (x40)
Date: Fri, 23 May 2008 01:40:26 -0700 (PDT)
Subject: Google Treasure solution in python - first time python user, help 
	whats wrong
Message-ID: <44de619e-14f3-49d2-b336-a14e5dca12cd@e39g2000hsf.googlegroups.com>

I try to learn python thru solving some interisting problem, found
google trasure hunt,
write first program ( but cant find whats wrong).

# Unzip the archive, then process the resulting files to obtain a
numeric result. You'll be taking the sum of lines from files matching
a certain description, and multiplying those sums together to obtain a
final result. Note that files have many different extensions, like
'.pdf' and '.js', but all are plain text files containing a small
number of lines of text.
#
#Sum of line 5 for all files with path or name containing abc and
ending in .js
#Sum of line 5 for all files with path or name containing HIJ and
ending in .js
#Hint: If the requested line does not exist, do not increment the sum.
#
#Multiply all the above sums together and enter the product below.
#(Note: Answer must be an exact, decimal representation of the
number.)

import fnmatch
import os

def zbrojipl(pattern):
    rootPath = ''
    sum1=0
    for root, dirs, files in os.walk(rootPath):
     for filename in files:
      path=os.path.join(root, filename)
      if fnmatch.fnmatch(path, pattern):
        #print path
        f=open(path)
        redovi=f.readlines()
        #print len(redovi),redovi
        if len(redovi)>=5:
            #print redovi[4] # index od 0 kao C
            sum1=sum1+int(redovi[4])
    return sum1

print zbrojipl('*[abc]*.js')*zbrojipl('*[HIJ]*.js')


From BrianVanderburg2 at aim.com  Thu May  8 07:31:17 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 08 May 2008 07:31:17 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
Message-ID: <4822E485.4040107@aim.com>

This is sort of related, but I'm wondering what is different between 
"#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
thing, since an absolute path is not specified, find 'python' from the 
PATH environment,  I don't really know.

Brian Vanderburg II


From ggpolo at gmail.com  Sat May 10 11:48:30 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 12:48:30 -0300
Subject: People still using Tkinter?
In-Reply-To: <4825C265.90106@codebykevin.com>
References: <mailman.896.1210396853.12834.python-list@python.org>
	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
	<4825C265.90106@codebykevin.com>
Message-ID: <ac2200130805100848u781771e5u9249bb4e8254cbad@mail.gmail.com>

2008/5/10 Kevin Walzer <kw at codebykevin.com>:
> Guilherme Polo wrote:
>>
>> 2008/5/10 Zentrader <zentraders at gmail.com>:
>>>
>>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>>> extension for additional widgets, and TkTable and/or TableListWrapper.
>>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
>>
>> There is also Tile, or Ttk since Tk 8.5, if you are interested in
>> extensions too.
>> Apparently there are three Tile wrappers now, two are incomplete
>> (sorry for saying that):
>>
>> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
>> of ttk styling, maybe other things and it is not only a ttk wrapper
>> (there are other things besides it)
>> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
>> Treeview, big part of ttk styling and maybe something else.
>>
>> And there is also one I'm doing, that I expect to be complete:
>>
>> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
>>
>> Documentation and samples are still lacking, but I'm working on them.
>> And I haven't tested it under Windows, so I invite you all to test it.
>>
>> Regards,
>>
> I'm the maintainer of Tile.py. It may well be incomplete, as it was first
> developed by Martin Franklin a couple of years ago and I've been modifying
> it as my own needs require.
>
> So you're doing your own implementation of ttk in Tkinter as a Google Summer
> of Code Project? Wonderful! Are you planning on submitting it for including
> in Tkinter's core, as I did?

Thanks ;)
And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

> If yours proves to be the better implementation
> I'll gladly withdraw mine, as I'm not sure I have time to overhaul it
> extensively.
>
> I'll follow your progress with interest!

Thanks for support it, and sorry for saying yours was incomplete.
I wasn't trying to sell my version by doing that, was just trying to
say there were some point on doing another wrapper. I also noticed
that there is some problem in getting Martin Franklin to fill the
contributors agreement, that was the second point on doing this
wrapper.

>
> --Kevin
>
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com
>

Regards,


-- 
-- Guilherme H. Polo Goncalves


From mccredie at gmail.com  Fri May  2 13:21:03 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 2 May 2008 10:21:03 -0700 (PDT)
Subject: Preventing 'bad' filenames from raising errors in os.path
References: <mailman.465.1209746433.12834.python-list@python.org>
Message-ID: <31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>

On May 2, 9:40 am, pyt... at bdurham.com wrote:
> Bad file names, i.e. filenames the OS considers illegal, will cause
> functions in the os.path module to raise an error.
>
> Example:
>
> import os.path
> print os.path.getsize( 'c:/pytest/*.py' )
>
> On Windows XP using Python 2.5.2 I get the following traceback:
>
> Traceback (most recent call last):
>   File "<string>", line 74, in run_nodebug
>   File "<Module1>", line 3, in <module>
>   File "C:\Python\lib\ntpath.py", line 228, in getsize
>     return os.stat(filename).st_size
> WindowsError: [Error 123] The filename, directory name, or volume label
> syntax is incorrect: 'c:/pytest/*.py'
>
> Since there are many places a user can enter a path name (interactively,
> via config files, etc) in most applications, is there an os sensitive
> function that can be used to detect bad file names?
>
> As a matter of best practice, how do you wrap your use of file and path
> names to prevent unexpected failures? (There has to be a better
> alternative than try/except blocks around each use of an os.path
> function in one's code?)
>
> Thanks,
> Malcolm

What do you find troubling about try/except?

Compare:

import os.path

path = raw_input("enter a path:")
if isvalidpath(path): # this is a made up name
    print os.path.getsize(path)
else:
    # Do something else

To:

import os.path

path = raw_input("enter a path:")
try:
    print os.path.getsize(path)
except WindowsError:
    # Do something else

Now, I can understand if you don't like the "WindowsError" as that is
obviously platform specific. The try/except pattern however is the way
errors are handled in python and the best and most appropriate way to
deal with it. The above example just shows that at the very least
there isn't a significant difference in code size between the two
methods.

I don't know what the equivalent error is called in *nix but assume it
is PosixError (it isn't), then it would just be written this way:

import os.path

path = raw_input("enter a path:")
try:
    print os.path.getsize(path)
except (WindowsError, PosixError):
    # Do something else


You don't _always_ need to wrap os.path functions with try/except. You
only need to wrap where there is reason to expect that the input might
be prone to error. In those cases the alternative is what? wrapping it
in a if/else instead? How is that better?

Matt


From lowell at allemansonline.com  Wed May 28 16:53:56 2008
From: lowell at allemansonline.com (Lowell Alleman)
Date: Wed, 28 May 2008 16:53:56 -0400
Subject: Custom log handler and logging.config.fileConfig()
Message-ID: <839ec5810805281353w637e3e9yadf1f582f6d8c780@mail.gmail.com>

Here is the situation:  I wrote my own log handler class (derived from
logging.Handler) and I want to be able to use it from a logging config
file, that is, a config file loaded with the
logging.config.fileConfig() function.

Let say my logging class is called "MyLogHandler" and it's in a module
called "mylogmodule", I want to be able to make an entry something
like this in my logging config file:

   [handler_hand02]
   class=mylogmodule.MyLogHandler
   level=DEBUG
   formatter=form02
   args=('python.log', 10, True)

I did some digging in the code and documentation, and it doesn't
appear that this question of writing and accessing your own log
handlers is addressed.  As per the logging/config.py code, it looks
like the actual file handler classes are being grabbed using an "eval"
from the "logging" module's namespace, like so:
   klass = eval(klass, vars(logging))

So this basically means that I have to mess with the "logging"
module's namespace if I want this to work, right?  So I've come up
with a couple of options, but I'm trying to figure out what approach
is best:

Option 1:  Require the client (the user of my logging module), first
import my module and then copy it into the logging module's namespace,
before calling  fileConfig().  Something like this:

    import mylogmodule
    import logging
    logging.mylogmodule = mylogmodule

Option 2:  Have my module make a copy MyLogHandler class into the
logging (or logging.handlers) module, and then let the client use it
from their directly.  They client would still have to load my logging
class first (which isn't any different they what they would have to do
if they wanted to use the extended log handlers form the
logging.handlers module)

My module would include:
    import logging
    class MyLogHandler(logging.Handler):
        ...
    logging.MyLogHandler = MyLogHandler

The config file would simply have:
    class=MyLogHandler


Option 3:   Is there an easy (and non-evil) way for me to make my
module available as "logging.mylogmodule" directly?  I am using
setuptools, and it seems like what I've read about "namespaces", they
do something close to what I'm looking for, but I think that requires
that all of the "__init__.py"s involved be empty (or have some special
namespace declaration code).  The __init__.py for the logging module
is not at all empty, so I suppose that rules out this option?  Anyone
have some insights on this?


Thanks in advance,

- Lowell Alleman


From clabepa at gmail.com  Thu May 15 02:51:48 2008
From: clabepa at gmail.com (Claudio Driussi)
Date: Thu, 15 May 2008 08:51:48 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <mailman.1126.1210786968.12834.python-list@python.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
	<mailman.1126.1210786968.12834.python-list@python.org>
Message-ID: <482bdd7f$0$22075$6e1ede2f@read.cnntp.org>

Stef Mientki wrote:

>>> I've ran the first real world application through PPyGui-emulator,
>>> so I think it's time to release the first version.
>>> There's lot of room for improvements and a more beautiful layout.
>>>
>>> PPyGui-emulator is build upon wxPython and released under BSD license.
>>>
>>> For remarks, screen shots and downloads, see
>>> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html
>>
>> Wow! wonderful.
>> I was searching for it for debugging and easy development purposes,
>> screenshots sounds promising.
>>
>> but the api.py link is broken.
> Well the file is correctly at the server,
> and indeed it downloads as nonsense ???
> Is it not possible to just put a py-file on the server ??
> 
> Anyway, I've changed it into a zip file, and now everything works (at 
> least at my place)

Yea, tried, it works like a charm even into winpdb debugger.

Very nice, many thanks
Claudio



From alokkat at gmail.com  Sat May  3 12:26:43 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Sat, 3 May 2008 12:26:43 -0400
Subject: State machine Example in Python
Message-ID: <e3a81e680805030926he8af71cjddb8798f84c23bac@mail.gmail.com>

Can someone please redirect me for a state machine example or design pattern
used in Python.

Regards
Alok
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From marco at sferacarta.com  Tue May 13 06:20:12 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 12:20:12 +0200
Subject: array in class
In-Reply-To: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
References: <3f2b8a18-8f5b-4188-acb7-660d73574027@m44g2000hsc.googlegroups.com>
Message-ID: <xXdWj.41723$o06.15763@tornado.fastwebnet.it>

alefajnie wrote:

> class B:
>   this_is_common_for_all_instances = []
> 
>   def __init__(self, v):
>     self.this_is_common_for_all_instances.append(v)
> 
> 
> ----------------
> now I can create some instances of B, but all of them have the same
> array, why

Because you didn't reassign the attribute 
'this_is_common_for_all_instances', but appended to it.

> and how create array in class - normal array, "private variable"

1) it's called a list, not an array
2) you do that in the __init__ method: self.blabla = []
3) still, it won't be a "private" attribute, just an instance attribute


From mensanator at aol.com  Sun May 18 19:17:55 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 16:17:55 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>

On May 18, 5:20?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Odd, I've been using Python since ver 2.2 and I've
NEVER needed a GUI. I do things like (looking at the
last 6 months of my Python directory):

- how to scrape movie receipt data from IMDB
  and insert them into an MS-Access database

- how to scrape .jpgs from a web page (simple
  file transfer, no display needed)

- how to do a Cartesian Product in SQLlite3

- how to creat a polynomial from a sequence of
  numbers using Newton's Forward Differences method

- how to calculate the date of Easter

- how to construct arbitrary length cycles in the
  Collatz Conjecture

- how to find the Ultimate Cycle (also in Collatz
  Conjecture)

- efficient cycle detection comparing Brent's and
  Sedgewick's cycle detection algorithms

- finding the cycles of 3n+C systems

- partioning W marbles into D ordered bins with
  the constraint that each bin contain a minimum of 1

- partioning W marbles into D ordered bins with
  the constraint that each bin contain a minimum of 1
  and that no bin exceeds M

- a Python Cartesian Product that in addition to
  Permutaions with Replacement, also gives the subsets
  Permutations without Replacement, Combinations with
  Replacement and Combinations without Replacement

- demonstrating the fallacy of Peter Scorer's "proof"
  of the Collatz Conjecture

- demonstrating the fallacy of Alan Tyte's "proof" of
  the Collatz Conjecture

- demonstrating the fallacy of Ken Conrow's "proof" of
  the Collatz Conjecture

- how to identify which members of the infinite solutions
  to a given Sequnce Vector of a 3n+C system are located
  on the trivial graph component

- developing a novel factoring algorithm based on the
  Collatz Conjecture

I see no need for GUI in any of these applications.




From dickinsm at gmail.com  Wed May 21 16:20:38 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Wed, 21 May 2008 13:20:38 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<ec9eg5-7lm.ln1@pluto.solar-empire.de>
Message-ID: <5f27111e-942c-48c1-81c1-fe1567e887bb@c58g2000hsc.googlegroups.com>

On May 21, 3:22?pm, Marc Christiansen <use... at solar-empire.de> wrote:
> On my system, it works:
>
> ?Python 2.5.2 (r252:60911, May 21 2008, 18:49:26)
> ?[GCC 4.1.2 (Gentoo 4.1.2 p1.0.2)] on linux2
> ?Type "help", "copyright", "credits" or "license" for more information.
> ?>>> a = 1e16 - 2.; a
> ?9999999999999998.0
> ?>>> a + 0.9999
> ?9999999999999998.0
>
> Marc

Thanks for all the replies! It's good to know that it's not just
me. :-)

After a bit (well, quite a lot) of Googling, it looks as though this
might be known problem with gcc on older Intel processors: those using
an x87-style FPU instead of SSE2 for floating-point.  This gcc
'bug' looks relevant:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323

Now that I've got confirmation I'll open a Python bug report:  it's
not clear how to fix this, or whether it's worth fixing, but it
seems like something that should be documented somewhere...

Thanks again, everyone!

Mark


From n00m at narod.ru  Thu May  1 05:21:22 2008
From: n00m at narod.ru (n00m)
Date: Thu, 1 May 2008 02:21:22 -0700 (PDT)
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
	<mailman.398.1209633049.12834.python-list@python.org>
Message-ID: <7292bae2-993e-41cc-8f0e-8d1339ecebdf@25g2000hsx.googlegroups.com>



Gabriel Genellina:
> En Thu, 01 May 2008 04:35:17 -0300, n00m <n00m at narod.ru> escribi?:
>
> > from random import randint
> >
> > s1 = ''
> > s2 = ''
> >
> > for i in xrange(1000):
> >     s1 += chr(randint(97,122))
> >     s2 += chr(randint(97,122))
> >
> > print s1[:25]
> > print s2[:25]
> >
> > import difflib
> >
> > s = difflib.SequenceMatcher(None, s1, s2)
> >
> > print s.find_longest_match(0, len(s1), 0, len(s2))
> >
> >
> >
> >>>> ============== RESTART ====================
> >>>>
> > yymgzldocfaafcborxbpqyade
> > urvwtnkwfmcduybjqmrleflqx
> > (0, 0, 0)
> >>>>
> >
> > I think it's line #314 in difflib "who's to blame" --
>
> Me too. Could you think of some alternative? Simply disabling that
> "popularity check" would slow down the algorithm, according to the
> comments.
>
> --
> Gabriel Genellina

No idea :)


From skanemupp at yahoo.se  Sat May  3 12:51:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 3 May 2008 09:51:06 -0700 (PDT)
Subject: pygame: rect moveto?
Message-ID: <7360a3b3-61b8-4cb9-b4d7-177c532bc880@b1g2000hsg.googlegroups.com>

http://www.pygame.org/docs/ref/rect.html#Rect.move

well i need to put my rect ina specific place and i donw know from
where i will move it so i need a function rect.moveTo(x,y).

how do i do that?


From daveparker at flamingthunder.com  Mon May 12 21:36:20 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 18:36:20 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
Message-ID: <1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>

On May 12, 7:20?pm, castiro... at gmail.com wrote:
>?Yes, I am trying to visualize something.

If it is related to making furniture comfortable for humans, have you
considered painting the furniture with thermochromic paint (
http://en.wikipedia.org/wiki/Thermochromism )?  It changes color in
response to temperature, which in part is determined by how hard a
body is pressed against it because close contact tends to trap heat.
An evenly distributed color might indicated evenly distributed
pressure.



From metawilm at gmail.com  Mon May  5 14:55:38 2008
From: metawilm at gmail.com (metawilm at gmail.com)
Date: Mon, 5 May 2008 11:55:38 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com>

On May 4, 1:11 pm, castiro... at gmail.com wrote:
> There is no such thing as a 'frame' per se in C; byte code is
> integral.  As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state.

Well, for implementing generators there are alternatives to using
frames + byte code. In CLPython generators are implemented with
closures. (Which does not help much when it comes to reimplementing
generators in C, alas.)

- Willem


From goldnery at gmail.com  Fri May 30 13:11:40 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 10:11:40 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
	<6aanqgF36mnldU1@mid.uni-berlin.de>
Message-ID: <2980f056-a68f-4d8e-9104-642ef5911fcf@k37g2000hsf.googlegroups.com>

Hi Diez, I can't see how it  matter which GUI-Toolkit i uses because I
can combine libraries.
I think all that matter is that i work with windows XP.

if you ever done something like that or you familiar with article
which can show me how to implement what I asked it would help me

Thank you very much


From jaywgraves at gmail.com  Fri May 16 15:22:43 2008
From: jaywgraves at gmail.com (jay graves)
Date: Fri, 16 May 2008 12:22:43 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
Message-ID: <9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>

On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
> i extract info from one file and put it into a dictionary.
> i want to save that dictionary for later use, how do i do that?
> might save a list of dictionaries or a list of classobjects too if
> there is any difference.

use the 'pickle' module.
http://docs.python.org/lib/module-pickle.html

...
Jay Graves


From unknown_hero007 at hotmail.com  Wed May  7 07:25:44 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Wed, 7 May 2008 04:25:44 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org>
Message-ID: <f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com>

Thank you, I think I can manage now. It's nice that you could spare
some time to help me in this, Tim. People like you make the world a
better place :)

I'll post my code here once I have time to write it, currently I'm
rather busy. That is merely for optimization suggestions and for
others who might need the same sort of code I did.


Thank you once again.


From hat at se-162.se.wtb.tue.nl  Tue May  6 09:23:35 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 15:23:35 +0200
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <slrng20mun.1cu.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, krumblebunk at gmail.com <krumblebunk at gmail.com> wrote:
> Hello gurus,

Hello fellow-guru,

> I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
> module), and when it returns the result, I am pulling it out as such:
>
> try:
>     sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
> except pg.InternalError:
>     print "Failed to execute SQL: %s" % sql
>     exit
>
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result

I am sure the above is very good. However, as I never program a data base, I
absolutely have no clue what data structure you assume here. A literal value in
Python syntax or so would be quite useful.

>     f=dict(foo)

f becomes a dict here. Not sure why you do this, as you stated above that you
already had a dict.

>     for k in f.iteritems()

k becomes here all key/value pairs of f, ie it is a tuple
example:

f = {1:'a', 2:'b'}
for k in f.iteritems():
  print k

will print something like

(1, 'a')
(2, 'b')

A more useful statement could be

for k,v in f.iteritems():
   ...

here a multi-assignment is done (the tuple is broken and each part is assigned
to a seperate variable), k becomes the key-part, and v becomes the value-part

>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.

This will break in two ways. Firstly, k was a tuple, so you cannot compare it
with a string. Secondly, this is not the way to match partial strings.

The first problem can be solved with the multi-assignment, or by indexing on
the tuple (ie k[0] or k[1]).

For the second problem, have a look at the string methods:
http://docs.python.org/lib/string-methods.html#l2h-233

In this particular case, you can use
if k.startswith('Hostname'):
or
if k[:8] == 'Hostname': # Slice the first 8 chars of the string

For more powerful regular expressions, read the 're' module documentation.


>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.

f is a dict. That means indexing is on its keys. Unless you have the integer
key 3 in your dictionary, this will not work.

f = {3:'q'}
print f[3]  # prints 'q'

However, a dict has no order, so the '4th column' has no meaning.

On the other hand, if f is a list, like [10,20,30,40,50], then f[3] is 50,
because you can use integers to index in a list (indexing is just a simple form
of slicing).

> This breaks spectacularly -

Ah, segmentation fault?
(that would be spectacular at least).

It would also help if you tell us at what line it breaks and with what error.


> any ideas?

Without a explicit Python value of what comes out of the sql query, I can only
guess. As example, assume the following data:

f = { 1: ['Hostname', 'blabla', 'person', 'john'],
      2: ['MachineName', 'blabla', 'company', 'something']}

ie a dictionary of column number to rows.

Here you are only interested in the value part, and the code becomes.

for v in f.itervalues():
  if v[0].startswith('Hostname'):
     print v[3]




From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 15:39:32 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 14:39:32 -0500
Subject: Any other UI kits with text widget similar to that in Tk?
Message-ID: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>

I'm wondering if any of the other GUI kits have a text widget that is  
similar in power to the one in Tk. wxWindows, from what I can tell,  
doesn't offer nearly the options the Tk widget does. I'm less familiar  
with Qt. Any feedback would be most appreciated.

Thanks,
Ken



From gagsl-py2 at yahoo.com.ar  Sun May 18 05:04:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 06:04:03 -0300
Subject: r' question
References: <20080518023835.61FE61E4009@bag.python.org>
	<op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<20080518054915.9555B1E4007@bag.python.org>
Message-ID: <op.ubcd412cx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 02:49:03 -0300, Dick Moores <rdm at rcblue.com> escribi?:

> However, (please refer back to my original post)
> I want to keep the fstr, ultimately to be the
> string entered by the user who knows a bit about
> regex, but not how to use r'  ' . Or
> alternatively, not assume any knowledge of regex,
> but build in some options, such as ignoring/not
> ignoring case, searching on just a string, or on
> a word. So I want to know how to build the user's
> fstr into regex. I apologize for not making this clear.

Ok, supose the user enters "joe (home)" and you want to build a regular expression to find that words surrounded by space:

fstr = "joe (work)"
regex = r"\s" + fstr + r"\s"

This doesn't work exactly as expected, because "(" and ")" have a special meaning in a regular expression; use re.escape:

regex = r"\s" + re.escape(fstr) + r"\s"

You may use "\\s" instead of r"\s", it's the *same* string. The r prefix is just a signal, it says how to interpret the source code, not part of the string.

-- 
Gabriel Genellina



From eliben at gmail.com  Wed May 28 12:09:14 2008
From: eliben at gmail.com (eliben)
Date: Wed, 28 May 2008 09:09:14 -0700 (PDT)
Subject: accessing class attributes
Message-ID: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>

Hello,

I have a game class, and the game has a state. Seeing that Python has
no enumeration type, at first I used strings to represent states:
"paused", "running", etc. But such a representation has many
negatives, so I decided to look at the Enum implementation given here:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486

So, I've defined:

class Game:
  self.GameState = Enum('running', 'paused', 'gameover')

  def __init__
   ... etc

Later, each time I want to assign a variable some state, or check for
the state, I must do:

  if state == self.GameState.running:

This is somewhat long and tiresome to type, outweighing the benefits
of this method over simple strings.

Is there any better way, to allow for faster access to this type, or
do I always have to go all the way ? What do other Python programmers
usually use for such "enumeration-obvious" types like state ?

Thanks in advance
Eli


From ppearson at nowhere.invalid  Sat May  3 13:48:32 2008
From: ppearson at nowhere.invalid (Peter Pearson)
Date: Sat, 03 May 2008 12:48:32 -0500
Subject: Getting started with pyvtk
References: <eYmdnXL5LdJtsIfVnZ2dnUVZ_rOqnZ2d@supernews.com>
	<mailman.433.1209678384.12834.python-list@python.org>
	<ividnVFUwo5itYbVnZ2dnUVZ_rfinZ2d@supernews.com>
	<481b35eb$0$24406$5fc3050@news.tiscali.nl>
Message-ID: <IpadnTXNrLntOIHVnZ2dnUVZ_qSonZ2d@supernews.com>

On Fri, 02 May 2008 17:40:02 +0200, Paul Melis wrote:
>
> I'm not sure you've been helped so far as you seem to already understand 
> about pyvtk not being the official VTK bindings :)
>
> So, what would you like to know?

Thanks, I think I'm set.  For the benefit of the next instance of
me googling around trying to get started driving VTK from Python,
here's what I wanted to find:

 - Ignore pyvtk.

 - Import vtk.

 - To see how to drive VTK from Python, run all the files
   of the form /usr/share/vtk/.../*.py and see which ones
   do something like what you want to do.

-- 
To email me, substitute nowhere->spamcop, invalid->net.


From d3vvnull at gmail.com  Thu May  8 10:28:37 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 09:28:37 -0500
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
	<18c1e6480805080549h70885464r8d8a177741ffcabd@mail.gmail.com>
Message-ID: <170543c70805080728y4d81f0b5o9b76cbe170bc55e5@mail.gmail.com>

I miswrote my question.  But I still completely understand.  What I really
wanted to know was whether there was something equivalent to how perl can
perform inplace edits of a file with something like the magic $^I variable.


I see from Gabriel that you can use the fileinput module to  achieve this.
Very cool.

And yeah, I think ruby is very perl-like, in that like perl, which looks
like someone duct-taped shell, sed, awk and c into a scripting language,
ruby duct-taped perl, Smalltalk and Python together.

On Thu, May 8, 2008 at 7:49 AM, David <wizzardx at gmail.com> wrote:

> On Thu, May 8, 2008 at 2:11 PM, Michael Mabin <d3vvnull at gmail.com> wrote:
> > Does python have an equivalent to Perl's inplace-edit variable $^I?
> >
>
> I misread your question.
>
> No, Python eschews magic characters and symbols. They make code ugly
> and harder to read and maintain.
>
> The first 3 lines of the Zen of Python:
>
> Beautiful is better than ugly.
> Explicit is better than implicit.
> Simple is better than complex.
>
> You might find a variable like that in Ruby, which has strong Perl
> influences.
>
> David.
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From gagsl-py2 at yahoo.com.ar  Mon May  5 01:28:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:28:30 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>
Message-ID: <op.uan1hsg0x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:09:02 -0300, hdante <hdante at gmail.com> escribi?:

>  Isn't this guy a bot ? :-) It's learning fast. I believe there is a
> "frame" in C, composed of its stack and globals. For generators in C,
> you may look for "coroutines". For example, see:
>
> http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
>
>  A sample code follows:
>
> #define crBegin static int state=0; switch(state) { case 0:
> #define crReturn(i,x) do { state=i; return x; case i:; } while (0)
> #define crFinish }
> int function(void) {
>     static int i;
>     crBegin;
>     for (i = 0; i < 10; i++)
>         crReturn(1, i);
>     crFinish;
> }
>
>  The "suspended state" is saved in the static variable. It's not
> necessary to save the complete "frame", only the suspended state.

Quoting the author himself, "this is the worst piece of C hackery ever seen"

-- 
Gabriel Genellina



From alokkat at gmail.com  Tue May 13 21:17:10 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Tue, 13 May 2008 21:17:10 -0400
Subject: libxml2 Installation for Python 2.4
Message-ID: <e3a81e680805131817o1780db45xa9d3c024ba93e489@mail.gmail.com>

Hi,

Can someone point me how to install libxml2 for python. It works fine on my
Redhat 4.0 linux Box, but when I am trying to run my script on ARM target ,
it throws import error for libxml2.

I am using xpath in my script and in header trying to import libxml2.

Thanks in advance.
Alok
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From pavlovevidence at gmail.com  Thu May 22 19:32:07 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 22 May 2008 16:32:07 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <0c6091d2-4658-49f2-8f5d-9553d4aa3685@a70g2000hsh.googlegroups.com>

On May 22, 12:14 pm, cm_gui <cmg... at gmail.com> wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

I expect Dave Parker here any minute to tell us how Flaming Thunder
isn't slow.


Carl Banks


From ukaluzhny at nds.com  Thu May 15 02:41:51 2008
From: ukaluzhny at nds.com (urikaluzhny)
Date: Wed, 14 May 2008 23:41:51 -0700 (PDT)
Subject: [x for x in <> while <>]?
Message-ID: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>

It seems that I rather frequently need a list or iterator of the form
[x for x in <> while <>]
And there is no one like this.
May be there is another short way to write it (not as a loop). Is
there?
Thanks


From notnorwegian at yahoo.se  Sun May 25 02:37:00 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 23:37:00 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
Message-ID: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>

im writing a webcrawler.
after visiting a new site i want to store it in alphabetical order.

so obv i want fast insert. i want to delete duplicates too.

which datastructure is best for this?


From ptbremer at gmail.com  Mon May 19 19:28:06 2008
From: ptbremer at gmail.com (Timo)
Date: Mon, 19 May 2008 16:28:06 -0700 (PDT)
Subject: Mac OS distultils probelm
Message-ID: <543d2586-941d-4a9c-ae91-d5c752979034@p25g2000pri.googlegroups.com>

Hello there,

I'm working on a python extension module that I'm trying to install
using the distutils setup tools and I am running into a strange linker
problem. Here is the situation: I have a bunch of code (swig-wrapped C+
+ in this instance) that I want to compile into a module. The
compilation itself works just fine and so does the initial linking.
The linker command that distutils spits out looks somewhat like this

g++  -bundle -undefined dynamic_lookup mymodule_wrap.o  -o
_mymodule.so -framework Carbon -framework Cocoa -framework
ApplicationServices -framework AGL -framework OpenGL -framework GLUT -
framework Cocoa /usr/lib/libz.dylib

However, when I load the module in python a whole bunch of system
symbols are undefined starting in this case with aglSwapBuffers

ImportError: dlopen(_mymodule.so, 2): Symbol not found:
_aglSwapBuffers
Referenced from: _mymodule.so  Expected in: dynamic lookup

My understanding is that the _mymodule.so file should "know" that this
symbol came out of the AGL framework and thus look for it there. I
could understand if python wouldn't find the framework because of a
DYLD_LIBRARY_PATH issue or the like but here the problem seems to be
that the information from where the symbol came from is lost.

If I do a "more" on the _mymodule.so file that seems to be indeed what
happens. I see links to "/usr/lib/libz.dylib" and the system libraries
in there but none to the frameworks. However, now comes the really
interesting part. If I execute the *identical* command line from the
same shell I called "python setup.py install" from I get a different
library which *does* include the links to the frameworks. If I install
that file instead of the original everything works as expected.

So there seems to be a strange problem inside distutils. I looked at
that source code but couldn't make any sense out of it. Any idea of
what could cause this and how this could be fixed would be greatly
appreciated

Thanks
Timo



From kay.schluehr at gmx.net  Thu May 22 00:25:11 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 21 May 2008 21:25:11 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<a569e394-2409-487d-88b2-a8fb3c904cb1@p25g2000hsf.googlegroups.com>
Message-ID: <62e09b0a-468a-40b4-8202-e6c6a325a383@b1g2000hsg.googlegroups.com>

On 21 Mai, 19:56, sturlamolden <sturlamol... at yahoo.no> wrote:
> On May 21, 11:38 am, boblat... at googlemail.com wrote:
>
> > if (match = my_re1.match(line):
> >   # use match
> > elsif (match = my_re2.match(line)):
> >   # use match
> > elsif (match = my_re3.match(line))
> >   # use match
>
> > ...buy this is illegal in python.
>
> Assignment expressions is disallowed in Python to protect against a
> very common bug in C/C++ programs, the (accidental) confusion of
>
>    if (match = my_re1.match(line))
>
> with
>
>    if (match == my_re1.match(line))
>
> or vice versa.

This is just a syntactical issue. But what is the *value* of an
assigment? In Python it is always None: assigments are statements, not
expressions.

However Guido and team have found a *pragmatic* solution for this at
another place:

with open("myFile") as f:
    BLOCK

Compare this with a possible syntactical form of an if-statement:

if EXPR as NAME:
    BLOCK

This isn't ugly syntax-wise. It's just a bit harder to understand the
semantics of an if-statement. It might read like this:

"Evaluate EXPR and compute bool(EXPR). If this value is True assign
EXPR to NAME and execute BLOCK. Otherwise refuse both assigment and
BLOCK execution."

Maybe assignment can be performed unconditionally as in the C case.
I'm not sure about this.


From mensanator at aol.com  Fri May  2 15:04:54 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 12:04:54 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
Message-ID: <9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>

On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
> Mensanator wrote:
> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
> >> Shawn Milochik wrote:
> >>> How does one "plonk" stuff from Google Groups? Specifically, how
> >>> can this be done in Gmail?
> >> Set up a filter that looks for some phrase in the mail headers that
> >> identifies messages originating from google groups. ?Gmail's filters are
> >> fairly flexible. ?I'd probably just have it look for certain words.
> >> Look at an e-mail's source (raw view) and particularly check in the
> >> headers for things to filter by.
>
> > Why don't you just block all messages from Gmail?
>
> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
> (implying it's use for his own posting and viewing the list) that would
> work splendidly for him! ?Or not.
>
> Of course you're not likely to see this message either since I and many
> folks on here post from gmail.
>
> Spam comes mainly from Google Groups, not as much from Gmail in my
> experience.

I didn't say it was POSTED from gmail, but the spammers often have
gmail addresses, to wit:

 age of empires 3 crack serial     		1 soray6034... at gmail.com (1
author) Apr 30
 microsoft office word 2007 keygen download     1
soray6034... at gmail.com (1 author) Apr 30
 ulead video studio 8 serial crack    		1 soray6034... at gmail.com (1
author) Apr 30
 daylight savings time patch     		1 soray6034... at gmail.com (1 author)
Apr 30
 the sims 2 crack     				1 soray6034... at gmail.com (1 author) Apr 30
 fifa manager 08 crack     			1 meisnernel73... at gmail.com (1 author)
Apr 30
 autocad 2005 cracks and cheats     		1 meisnernel73... at gmail.com (1
author) Apr 30
 rar password crack    				2 meisnernel73... at gmail.com (1 author) Apr
30
 crack rock cooking     			1 meisnernel73... at gmail.com (1 author) Apr
30
 vws crack     					2 meisnernel73... at gmail.com (1 author) Apr 30

Why aren't you blaming gmail for it's contribution to the problem?


From pistacchio at gmail.com  Thu May  8 07:23:59 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 13:23:59 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <fvunsh$jjm$1@aioe.org>

Raxit at MyKavita.com ha scritto:
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
> 

well, it's similar in the sense that it is a programming language. So 
you can say that assembly is similar to BASIC, but that both are 
different from finnish, but from a programmer's point of view, they're 
all rather different languages.

> what can i do easily with python which is not easy in c++/java !?
>

generally speaking python is said to be easier to pick up for a pletora 
of reasons. technically speaking, it is not, for example, strongly 
typed, nor it forces you to use a programming paradigm like object 
oriented programming.
This means that if you just want to see your name printed on the screen 
you can simply write:

print "raxit"

and get the work done. to understand it you just have to understand some 
basics like what is a string and what is a statement.

in java, for example, it would look like:

public class HelloWorld {
      public static void main(String[] args) {
          System.out.println("raxit");
      }
  }

in short, to obtain the same result (limited to this case) you have to 
write 650% more code and you're forced to know what is a class, what 
namespace means, what is a function (and arguments) and what are methods 
and the dot notation and an array. not that you won't encounter all of 
them learning python, but you're presented with all of them, all at 
once, in the moment where you just want to write the simplest program. 
that's why a typical java beginner's guide starts with ditto examples 
and adds: "ignore everything for the moment". i hate when i have to 
ignore things of a code that i'm writing!

the same applies to C# and, to a certain extend, C++ that is a much 
older language and present different learning problems.
Now, what can you do with python? Virtually everything (network 
programming, game programming, server side scripting). In most cases, it 
would run slower than it would do with the other languages (even slower 
than the slow java). You won't do drivers or kernels in python, but you 
won't even code them in java or C#.
the programs you'll write will mostly run on a number of different 
platform, like java programs. porting a c++ is a bit tougher. at the 
moment there is project (mono) that is porting the .net platform (where 
c# runs) to multiple platforms, but basically, if you write a c# program 
you're programming for windows.
hope it helps



> Tnx,
> Raxit
> www.mykavita.com


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun May 11 17:35:59 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 May 2008 23:35:59 +0200
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <68p75vF2ubdpbU1@mid.individual.net>

Gandalf wrote:
> On May 10, 2:36 pm, Bjoern Schliessmann <usenet-

>> It depends on your web server configuration. To get your web
>> server execute Python code, there are several alternatives like
>>
>> * CGI
>> * FastCGI
>> * mod_python
>
> my server is my computer 

I didn't mean which server hardware you use, but which web server
application. You need a web server application to use your "WWW
directory" in such a way.

> and all i did way to install python on it.

Nah, you probably have at least an operating system beneath Python.

Regards,


Bj?rn

-- 
BOFH excuse #264:

Your modem doesn't speak English.



From turian at gmail.com  Sat May 10 02:38:16 2008
From: turian at gmail.com (Joseph Turian)
Date: Fri, 9 May 2008 23:38:16 -0700 (PDT)
Subject: Find more than one error at once
Message-ID: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>

Is it possible to coax python to find more than one error at once?

Thanks,
  Joseph


From dfnsonfsduifb at gmx.de  Sat May 24 07:12:13 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:12:13 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
Message-ID: <dp9lg5xvm8.ln2@joeserver.homelan.net>

Carl Banks schrieb:

> p = myfunction()
> if p:
>     print p
> 
> (I recommend doing it this way in C, too.)

This is okay for if-clauses, but sucks for while-loops:

while (fgets(buf, sizeof(buf), f)) {
	printf("%s\n", buf);
}

is much shorter than

char *tmp;
tmp = fgets(buf, sizeof(buf), f);
while (tmp) {
	printf("%s\n", buf);
	tmp = fgets(buf, sizeof(buf), f);
}

> For the case where you want to do this in an elif-clause, look for the
> recent thread "C-like assignment expression?" which list some
> workarounds.  Or just Google this newsgroup for "assignment
> expression".  It's one of few minor irritating things in Python
> syntax.

Alright, I will. Thanks.

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From hat at se-162.se.wtb.tue.nl  Fri May 16 08:01:08 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 14:01:08 +0200
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>
	<slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>
	<1ff9bbaa-ae04-495a-a9a3-d2f7741e6cc5@k10g2000prm.googlegroups.com>
Message-ID: <slrng2qts4.9mc.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Venkatraman.S. <venkat83 at gmail.com> wrote:
> The problem being, if i change the config file, then the configobj has
> to reload this file again. I do not want to 'refresh' the config obj
> per transaction but only when the config params change.

If you have trustable time stamps at your file system, you could check the time
stamp before loading.

> I was thinking along the terms of an Interrupt driven program, which
> when getting a custom interrupts reloads the file - any potential
> loopholes/falls that anyone can anticipate?

Many unix deamons use SIGHUP signal to reload configs.
Maybe that would be an option?


Sincerely,
Albert



From paul at rudin.co.uk  Fri May 23 04:30:42 2008
From: paul at rudin.co.uk (Paul Rudin)
Date: Fri, 23 May 2008 09:30:42 +0100
Subject: Ploneboard - grouping forums and setting up on disk
Message-ID: <87tzgpzakt.fsf@rudin.co.uk>


I'm investigating using ploneboard and have a couple of questions.

First of all I don't quite get what the global view/local view
distinction is - perhaps someone could be good enough to explain what
it's for.

If it possible to group forums so that permissions can be applied to
each set so - for example - we have a set of public forums viewable by
everyone and a set of member's forums viewable only by logged in
members. I understand that permission can be set for each forum
individially, but it would be nice to have a grouping so that a new
forum can be added to a group and it automatically gets the appropriate
permissions for that group.

Finally - is it possible to configure the available forums and
permission on disk, so that a given forum structure can easily be setup
in a new plone instance without having to redo it through the web each
time?

TIA.


From bj_666 at gmx.net  Sat May 10 02:38:28 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 May 2008 06:38:28 GMT
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <68ku74F2sm1usU1@mid.uni-berlin.de>

On Sat, 10 May 2008 00:20:33 -0500, Kenneth McDonald wrote:

> Any guesses as to how many people are still using Tkinter? And can  
> anyone direct me to good, current docs for Tkinter?

AFAIK `Tkinter` hasn't changed much over time, so "old" documentation is
still current.

Ciao,
	Marc 'BlackJack' Rintsch


From toddw at activestate.com  Mon May  5 16:59:55 2008
From: toddw at activestate.com (Todd Whiteman)
Date: Mon, 05 May 2008 13:59:55 -0700
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
	<715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <481F754B.8060505@activestate.com>

TkNeo wrote:
> ok i have tried around a lot but no luck. I think M2Crypto is my best
> option except it requires a minimum of python 2.4 which i don't have.
> 
> What i am trying to do is to do an FTP transfer that uses SSL
> (username, password authentication) and not a certificate file. The
> few example i have found of the Openssl module use a certificate for
> authentication unlike what i want to do.

Komodo uses ssl to provide FTPS support (FTP over SSL), using the Python 
ssl socket library. From memory, I think there were problems trying to 
get FTPS to work on earlier versions of python (earlier than Python 2.4) 
and also a few problems working with Python 2.4 itself.

This code might provide some help (you can search for FTPS):
http://svn.openkomodo.com/openkomodo/view/openkomodo/trunk/src/components/koFTP.py

Cheers,
Todd


From jj.renes at hccnet.nl  Sun May  4 10:56:14 2008
From: jj.renes at hccnet.nl (joop renes)
Date: Sun, 04 May 2008 16:56:14 +0200
Subject: multirhreading&boost.python
Message-ID: <1209912974.11364.10.camel@van-dattum>

hi,
i hope this is the right list for the following question of a c++
hacker,python newbie. i have a library in c++ to which i want to add a
python GUI and other python stuff.The library has multithreading
components, while python uses a reference counted memory model. Usually
mixing reference counting with multithreading is frowned upon, at least
in the c++ world. what am i to expect in the python world, if i bring
multithreading c++ into it? just performance penalty or total disaster?
best regards
joop renes.


 



From certo at comeno.it  Mon May 26 14:09:31 2008
From: certo at comeno.it (imho)
Date: Mon, 26 May 2008 18:09:31 GMT
Subject: About Michele Simionato's "classinitializer" decorator
In-Reply-To: <5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>
References: <qaC_j.85793$FR.319565@twister1.libero.it>
	<5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>
Message-ID: <v1D_j.85835$FR.319683@twister1.libero.it>

Michele Simionato ha scritto:
> On May 26, 7:10 pm, imho <ce... at comeno.it> wrote:
>> Hi all.
>> I just send this post as a comment to the third part of Michele
>> Simionato's article about metaprogramming techniques at:
>>
>> http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT...
>>
>> I found extremely useful the classinitializer "trick".
> 
> I never use it. Too clever. I am waiting for class decorators
> in Python 2.6.

Uhm... I suspected that :-)

>> I was thinking
>> over the caveat not to call a class initializer after the _metaclass_
>> hook (an exception being raised in that case).
>> Am I wrong if I state there's a plain solution to this ?
> 
> I think your solution is fine. Still, consider waiting for
> class decorators ;)
> 
>        Michele Simionato

Of course, I stand waiting here :-)

Thanks, Diego.



From mal at egenix.com  Tue May  6 05:38:11 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 11:38:11 +0200
Subject: config files in python
In-Reply-To: <32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>	<482017EA.40706@egenix.com>
	<32822fe60805060207w46752243tdb0e4cad19ffa78b@mail.gmail.com>
Message-ID: <48202703.2020800@egenix.com>

On 2008-05-06 11:07, Jorge Vargas wrote:
> On Tue, May 6, 2008 at 4:33 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>> On 2008-05-06 01:16, Matimus wrote:
>>
>>> On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
>>>
>>>> Hi,
>>>>  In my application, I have some configurable information which is used
>>>> by different processes. currently I have stored configration in a
>>>> conf.py file as name=value pairs, and I am importing conf.py file to
>>>> use this variable. it works well
>>>>
>>>> import conf
>>>> print conf.SomeVariable
>>>>
>>>> but if I need to change some configuration parameteres,  it would need
>>>> me to restart processes.
>>>>
>>>> I want to store this data in some conf file (txt) and would like to
>>>> use it same way as I am using these variables as defined in py
>>>> files.
>>>>
>>>> one solution I can think of is writing data as a dictionary into conf
>>>> file. and then by reading data, apply eval on that data. and update
>>>> local dict? but this is not a good solution....
>>>>
>>>> any pointers?
>>>>
>>>> Sandip
>>>>
>>> I would load the configuration file using `imp.load_source'. This
>>> allows you to load the config file by filename, and gets away from the
>>> issue of accidentally importing a file somewhere else in pythons
>>> search path. Also, calling imp.load_source will reload the module when
>>> called a second time.
>>>
>>  >
>>
>>> http://docs.python.org/lib/module-imp.html
>>>
>>  Why not just use execfile() ?
>>
>>  http://www.python.org/doc/2.2.3/lib/built-in-funcs.html
>>
> that is very bad for this case, from what he is suggesting this is a
> server install so you are basically giving a vector of remote code
> execution (same with the first approach) but then execfile has the
> issue that it goes into your current namespace possibly creating a
> namespace crash which is even worst because an attacker can shallow
> say your auth module with something that will just return.

Not really: you can pass in the globals and locals dictionary
to execfile(), just like you can with __import__(), but you can't
with imp.load_source(), so execfile() is safer than using import
directly or via the imp module.

I don't see a problem with remote code execution - there's nothing
"remote" in loading a local config :-)

Also, you can pretty prevent all code execution that goes beyond simple
evals by restricting the globals, e.g.

globals = {'__builtins__':{}}
execfile('config.py', globals)

Doing so will prevent imports and doesn't expose the builtins
either, so there's little left for a user of the server
to manipulate - besides doing so by just inserting his own
os.py or similar common Python module would be far easier
anyway ;-)

>>> [conf.py]
>>> a = 1
>>> b = 2
>>> class c:
>>>    a = "hello"
>>>    b = "world"
>>> [/end conf.py]
>>>
>>>
>>>>>> conf = imp.load_source("conf", "./conf.py")
>>>>>> conf.a
>>>>>>
>>> 1
>>>
>>>>>> conf.b
>>>>>>
>>> 2
>>>
>>>>>> conf.c.a
>>>>>>
>>> 'hello'
>>>
>>>>>> conf.c.b
>>>>>>
>>> 'world'
>>>
>>>
>>>
>>> There are so many ways potential solutions to your problem that,
>>> without any more details, it is hard to suggest anything.
>>>
>>> Here are some potential solutions:
>>>
>>> ConfigParser - module for handling ini files
>>> xml - several built-in modules for handling XML files
>>> sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
>>> for config data)
>>> windows registry  - _winreg module
>>> pickle - serialize python objects
>>> marshal - similar to pickle, only works for simple objects
>>>
>>> Those are just the built-in solutions. If you wanna look at 3rd party
>>> solutions, prepare for overload. The number of alternative INI parsers
>>> alone is staggering.
>>>
>>> Also, there are many ways to organize your data and use a solution
>>> similar to what you are already using.
>>>
>>> I guess what I'm trying to say is... don't roll your own, it would be
>>> a waste of time, this problem has been solved 100s of times. That is,
>>> unless you want to do it for fun.
>>>
>>> Matt
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>  --
>>  Marc-Andre Lemburg
>>  eGenix.com
>>
>>  Professional Python Services directly from the Source  (#1, May 06 2008)
>>  >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>  >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>  >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
>>  ________________________________________________________________________
>>
>>  :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>>
>>
>>    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>>     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>>            Registered at Amtsgericht Duesseldorf: HRB 46611
>>
>>
>>  --
>>  http://mail.python.org/mailman/listinfo/python-list
>>

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From andreas.tawn at ubisoft.com  Thu May 15 13:20:58 2008
From: andreas.tawn at ubisoft.com (Andreas Tawn)
Date: Thu, 15 May 2008 19:20:58 +0200
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com><A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p><mailman.1174.1210868506.12834.python-list@python.org>
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
Message-ID: <8AEDA5E3386EA742B8C24C95FF0C75800403F7BC@PDC-MAIL3.ubisoft.org>

>print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
>\training_set') returns False...
>
>i have thourogly checked the filename to be correct and if we assume
>it is what could this mean then?
>i had a problem one other time when i had renamed a file but windows
>didnt rename it compeltely apparently.

It's escape characters again.

You're asking for
'C:\Users\saftarn\Desktop\NetFlixDataSet\training_set', but Python
interprets that as 'C:\Users\saftarn\Desktop\NetFlixDataSet
raining_set', which probably doesn't exist.

The first example works by accident because backslash plus the first
letter of each folder in your path happens to not match any of Python's
string formatting characters.

Use forward slashes or double up the backslashes to stop this happening.

Cheers,

Drea


From asmodai at in-nomine.org  Thu May  8 07:19:34 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Thu, 8 May 2008 13:19:34 +0200
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
Message-ID: <20080508111934.GB1016@nexus.in-nomine.org>

-On [20080507 15:06], Mike Driscoll (kyosohma at gmail.com) wrote:
>http://genshi.edgewall.org/
>http://www.kid-templating.org/
>http://www.cheetahtemplate.org/
>http://turbogears.org/

Add the following to that list:

http://jinja.pocoo.org/
http://www.makotemplates.org/

I think Jinja and Mako are currently two of the fastest around.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
If Winter comes, can Spring be far behind..?


From mensanator at aol.com  Fri May  9 00:58:42 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 21:58:42 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com> 
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <98967816-e310-4b59-a444-26fe0b37d550@a23g2000hsc.googlegroups.com>

On May 8, 11:47?pm, Yves Dorfsman <y... at zioup.com> wrote:
> Mensanator wrote:
> >> 2. python requires to pass "self" to all instance methods
>
> > Who uses methods?
>
> Is this a joke ?

Yes.

> What are the alternatives ?
>
>
>
> >> and I missed ":" often. :)
>
> > Try using something like Seed7, where you have to use "then" with
> > "if" and "do" with "while" and "end" in every block. Maybe you'll
> > come to appreciate significant whitespace and ":".
>
> I see the point of the OP. Couldn't the new-line be used as an equivalent of
> ? ':', for example, do you find this difficult to read:
>
> if a == 3
> ? ?do_something()
>
> if a == 3: do_something()
>
> And surely, it should be easy to parse by the compiler.

If they were to chane it, I wouldn't complain.

I just think it doesn't deserve complaints when
compared to other systems.

>
> Yves.http://www.SollerS.ca



From denis.kasak2718281828 at gmail.com  Sun May 25 18:36:49 2008
From: denis.kasak2718281828 at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 00:36:49 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1cpm1$jmf$1@aioe.org>

On Sun, May 25, 2008 at 1:43 PM, Martin Manns <mmanns at gmx.net> wrote:
 > Hi,
 >
 > I try to get a set of lambda functions that allows me executing each
 > function code exactly once. Therefore, I would like to modify the set
 > function to compare the func_code properties (or the lambda
 > functions to use this property for comparison).
 >
 > (The reason is that the real function list is quite large (> 1E5), there
 > are only few functions with non-equal code and the order of execution
 > is not important.)
 >
 > How can I achieve this?
 >
 > >>> func_strings=['x', 'x+1', 'x+2', 'x']
 > >>> funclist = [eval('lambda x:' + func) for func in func_strings]
 > >>> len(funclist)
 >  4
 > >>> len(set(funclist))
 >  4
 > >>> funclist[0].func_code == funclist[3].func_code
 >  True
 > >>> funclist[0] == funclist[3]
 >  False

Isn't this a bug? Shouldn't it be possible to create a set of
different lambda functions via a loop? At first I thought it was just
a quirk of list comprehensions, but the following example also yields
incorrect (or at least unintuitive) results:

 >>> spam = []
 >>> for i in range(10):
...   spam.append(lambda: i)
 >>> spam[0]()
9
 >>> spam[1]()
9

Manually creating the lambdas and appending them to a list works as
expected, naturally; I don't see a good reason why it wouldn't work
with a loop. Am I missing something?

--
Denis Kasak


From h.goebel at goebel-consult.de  Sat May 17 13:48:42 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Sat, 17 May 2008 19:48:42 +0200
Subject: rst2mediawiki?
Message-ID: <482f1a7a$0$6552$9b4e6d93@newsspool3.arcor-online.net>

Hello,

I'm looking for a rst2mediawiki writer. Unfortunatly mediawiki is quite 
widespread, but I prefere to sty with rst. Any hint?

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From arkanes at gmail.com  Wed May 21 17:17:59 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 21 May 2008 16:17:59 -0500
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <4866bea60805211417l3e6197e4ue83b27d27b6a0277@mail.gmail.com>

On Wed, May 21, 2008 at 3:56 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
>> My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.
> --

If you're going to use every post and question about Python as an
opportunity to pimp your own pet language you're going irritate even
more people than you have already.


From notbob at nothome.com  Mon May  5 14:43:11 2008
From: notbob at nothome.com (notbob)
Date: Mon, 05 May 2008 18:43:11 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <3zITj.35199$gB5.25251@fe105.usenetserver.com>

On 2008-05-04, notbob <notbob at nothome.com> wrote:

> I'm trying to learn how to program.  I'm using:
>   
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition

http://openbookproject.net//thinkCSpy/index.xhtml

OK then, using the above, I get everything up till chap 3 and functions and
then it all falls apart.  I try using his code and nothing.  I'm running
vers 2.5.1 on slackware 12.  Here's what I don't get:

----------

"Here is an example of a user-defined function that has a parameter:


def print_twice(bruce):
    print bruce, bruce
    
This function takes a single argument and assigns it to the parameter named
bruce.  The value of the parameter (at this point we have no idea what it
will be) is printed twice, followed by a newline.  The name bruce was chosen
to suggest that the name you give a parameter is up to you, but in general,
you want to choose something more illustrative than bruce.

****ME****
is this just an example of how the def should be written and it doesn't
really do anthing... yet?  I read another newb explanation here:
http://www.codepedia.com/1/BeginnersGuideToPython_Functions
...and it doesn't work, either.  I define myfirstfunction in the pyth editor
and give the command print myfirstfuntion and I get back this:
<function myfirstfunction at 0xb7b9c994>
....when I add the ._doc_, it get this:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'function' object has no attribute '_doc_'
....so, there is a no go there, too.
****ME****


The interactive Python shell provides us with a convenient way to test
our functions.  We can use the import statement to bring the functions
we have defined in a script into the interpreter session.  To see how this
works, assume the print_twice function is defined in a script
named chap03.py.  We can now test it interactively by
importing it into our Python shell session:

****ME****
ok, I try and follow the above, but where is he getting the script?  So, I
make a script called chap03.py and put it in ~/pyth/chap03/.  
****ME****

>>> from chap03 import *
>>> print_twice('Spam')
Spam Spam
>>> print_twice(5)
5 5
>>> print_twice(3.14159)
3.14159 3.14159

****ME****
I then try an do the import thing above, but the pyth ed accepts none of it.
not from:
from ~/pyth/chap03/ import *       
from chap03 import *            #taken from ~/pyth/
....nor from any other configuration I can imagine, so that "from" command
makes no sense.  
****ME****


In a function call, the value of the argument is assigned to the
corresponding parameter in the function definition.  In effect, it is if
bruce = 'Spam' is executed when print_twice('Spam')
is called, bruce = 5 in print_twice(5), and
bruce = 3.14159 in print_twice(3.14159)."

****ME****
OK, I'm totally lost.  Neither the above or the other link works or make any
sense at all.  Is the above print_twice(5), etc, supposed to work like the
original print_twice(bruce) function (which still doesn't!), just with a
different parameter?  Call me stupid, but I'd sure like to get past this.
How am I supposed to get the original def to work?  I've yet to figure out
how to get plain ol':
bruce bruce
Yes, I've indented 4 spaces where I should.  
****ME****

----------

I feel dumber'n a bag 0' hammers and in need of clarification.

Thank you
nb


From sjmachin at lexicon.net  Fri May  9 19:52:50 2008
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 09 May 2008 23:52:50 GMT
Subject: regexp help
In-Reply-To: <1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com>
Message-ID: <4824e3ce$1@news.mel.dft.com.au>

Paul McGuire wrote:
> from re import *

Perhaps you intended "import re".

> vowels = "aAeEiIoOuU"
> cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
> encodeRe = re.compile(r"([%s])[%s]\1" % (cons,vowels))
> print encodeRe.sub(r"\1",s)
> 
> This is actually a little more complex than you asked - it will search
> for any consonant-vowel-same_consonant triple, and replace it with the
> leading consonant.  To meet your original request, change to:
> 
> from re import *

And again.

> cons = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
> encodeRe = re.compile(r"([%s])o\1" % cons)
> print encodeRe.sub(r"\1",s)
> 
> Both print "prince".
> 

No they don't. The result is "NameError: name 're' is not defined".


From gnewsg at gmail.com  Sat May 31 15:40:15 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 31 May 2008 12:40:15 -0700 (PDT)
Subject: ThreadPoolingMixIn
References: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>
Message-ID: <d1f77941-4932-48bb-8aec-96facb1f1adc@a70g2000hsh.googlegroups.com>

On 30 Mag, 22:40, pavel.uva... at gmail.com wrote:
> Hi, everybody!
>
> I wrote a useful class ThreadPoolingMixIn which can be used to create
> fast thread-based servers. This mix-in works much faster than
> ThreadingMixIn because it doesn't create a new thread on each request.
>
> Is it worth including in SocketServer.py?
>
> from __future__ import with_statement
> from SocketServer import ThreadingMixIn
> import threading
> import Queue
> class ThreadPoolingMixIn(ThreadingMixIn):
> ? ? """Mix-in class to handle requests in a thread
> pool.
>
> ? ? The pool grows and thrinks depending on
> load.
>
> ? ? For instance, a threading UDP server class is created as
> follows:
>
> ? ? class ThreadPoolingUDPServer(ThreadPoolingMixIn, UDPServer):
> pass
>
> ? ? """
> ? ? __author__ = 'Pavel Uvarov <pavel.uva... at gmail.com>'
>
> ? ? def init_thread_pool(self, min_workers = 5,
> ? ? ? ? ? ? ? ? ? ? ? ? ?max_workers = 100, min_spare_workers = 5):
> ? ? ? ? """Initialize thread pool."""
> ? ? ? ? self.q = Queue.Queue()
> ? ? ? ? self.min_workers = min_workers
> ? ? ? ? self.max_workers = max_workers
> ? ? ? ? self.min_spare_workers = min_spare_workers
> ? ? ? ? self.num_workers = 0
> ? ? ? ? self.num_busy_workers = 0
> ? ? ? ? self.workers_mutex = threading.Lock()
> ? ? ? ? self.start_workers(self.min_workers)
>
> ? ? def start_workers(self, n):
> ? ? ? ? """Start n workers."""
> ? ? ? ? for i in xrange(n):
> ? ? ? ? ? ? t = threading.Thread(target = self.worker)
> ? ? ? ? ? ? t.setDaemon(True)
> ? ? ? ? ? ? t.start()
>
> ? ? def worker(self):
> ? ? ? ? """A function of a working
> thread.
>
> ? ? ? ? It gets a request from queue (blocking if
> there
> ? ? ? ? are no requests) and processes
> it.
>
> ? ? ? ? After processing it checks how many spare
> workers
> ? ? ? ? are there now and if this value is greater
> than
> ? ? ? ? self.min_spare_workers then the worker
> exits.
> ? ? ? ? Otherwise it loops
> infinitely.
>
> ? ? ? ? """
> ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? self.num_workers += 1
> ? ? ? ? while True:
> ? ? ? ? ? ? (request, client_address) = self.q.get()
> ? ? ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? ? ? self.num_busy_workers += 1
> ? ? ? ? ? ? self.process_request_thread(request, client_address)
> ? ? ? ? ? ? self.q.task_done()
> ? ? ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? ? ? self.num_busy_workers -= 1
> ? ? ? ? ? ? ? ? if self.num_workers - self.num_busy_workers > \
> ? ? ? ? ? ? ? ? ? ? ? ? self.min_spare_workers:
> ? ? ? ? ? ? ? ? ? ? self.num_workers -= 1
> ? ? ? ? ? ? ? ? ? ? return
>
> ? ? def process_request(self, request, client_address):
> ? ? ? ? """Puts a request into
> queue.
>
> ? ? ? ? If the queue size is too large, it adds extra
> worker.
>
> ? ? ? ? """
> ? ? ? ? self.q.put((request, client_address))
> ? ? ? ? with self.workers_mutex:
> ? ? ? ? ? ? if self.q.qsize() > 3 and self.num_workers <
> self.max_workers:
> ? ? ? ? ? ? ? ? self.start_workers(1)
>
> ? ? def join(self):
> ? ? ? ? """Wait for all busy threads"""
> ? ? ? ? self.q.join()

This is not the right place to discuss about such a thing.
Post this same message on python-dev ml or, even better, open a new
ticket on the bug tracker attaching the patch and, most important, a
benchmark demonstrating the speed improvement.

--- Giampaolo
http://code.google.com/p/pyftpdlib/


From miller.paul.w at gmail.com  Mon May 26 01:41:10 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 22:41:10 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com> 
	<3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com>
Message-ID: <3a550801-6e43-4c81-9749-7cb157446668@y21g2000hsf.googlegroups.com>

On May 25, 11:40?pm, pball.benet... at gmail.com wrote:

> This is a problem in statistical estimation. Given n records made up
> of k variables, define a cell as the point in the cartesian product of
> v_1 * v_2 * ... * v_k. I want to apply an estimator on the data in
> each cell.

So, basically, V = (v_1, v_2, ... , v_{k-1}, v_k) can be regarded as
an abstract, k-dimensional vector, right?

If I understand your revised problem statement correctly, what you
really want to do is build a graph of these vectors, where graph
adjacency is equivalent to adjacency in your sense.  That is, imagine
you have V_1, V_2, ... , V_n all sitting out in front of you,
represented abstractly as simple points.  Draw a line between V_i and
V_j if they are "adjacent" in your sense of the word.  What you have
then is a graph structure where your version of adjacency exactly
corresponds to graph adjacency.  Then, in your language, a stratum is
simply a path in this graph, and finding those is easy.

That is, unless I've got this all wrong. :-)


From vlastimil.brom at gmail.com  Wed May  7 08:29:04 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 14:29:04 +0200
Subject: mxTexTools (Re: using sqlite3 - execute vs. executemany;
	committing ...)
In-Reply-To: <48217560.9070707@egenix.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<48217560.9070707@egenix.com>
Message-ID: <9fdb569a0805070529v67412125s98874723179bc309@mail.gmail.com>

2008/5/7, M.-A. Lemburg <mal at egenix.com>:
>
> On 2008-05-07 00:07, Vlastimil Brom wrote:
>
> > Thanks for reminding me about
> > the mxTextTools; I looked at this package very quickly several months
> > ago and it seemed quite
> > complex and heavy-weight, but maybe I will reconsider this after some
> > investigation ...
> >
>
> mxTextTools gives you almost full C speed while still being programmable
> in Python and without a compiler.
>
> It is a low level parsing engine. Here's talk I gave on mxTextTools
> last year:
>
>
> http://www.egenix.com/library/presentations/EuroPython2007-Parsing-Languages-with-mxTextTools/
>
> If you're looking for ways to hide the complexity, you could try
> SimpleParse (which uses mxTextTools for the parsing, but provides a
> grammar based front-end).
>
> --
> Marc-Andre Lemburg
> eGenix.com
>
> Professional Python Services directly from the Source  (#1, May 07 2008)
> >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
> >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
> >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
> ________________________________________________________________________
>
> :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
>
>
>   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
>    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
>           Registered at Amtsgericht Duesseldorf: HRB 46611
>

Thank you very much for the info and for the helpful references, Marc-Andre,
I'll definitely have to take a closer look at mxTextTools, thanks for making
it available.

Greetings,
 Vlasta
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From gagsl-py2 at yahoo.com.ar  Fri May  9 10:41:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:41:42 -0300
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <op.uav5rsoax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:02:01 -0300, Viktor <alefnula at gmail.com> escribi?:

> This completely slipped of my mind... :)
>
> I'm trying to change the:
> http://wordaligned.org/svn/etc/echo/echo.py
>
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
>
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function - tried
> with inspect also)... And what is most interesting, when I do:

The decorator receives the original, plain function (unless you chain decorators) and whatever it returns is used instead of the original function.

> def w(fn):
>     print 'fn:', id(fn)
>     return fn
>
> class A:
>     @w
>     def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
>
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...
> Is there a way to find out in the decorator "what will the decorated
> function be"?

Whatever you return from the decorator.
But the decorator returns a *function* and A.__init__ is a *method*, an instance method in fact. The function can be found as A.__dict__['__init__']. Try this:

m = A.__init__
print m, type(m), id(m)
f = A.__dict__['__init__']
print f, type(f), id(f)

A method combines a function with an instance that becomes the "self" argument. In your case you're building an "unbound" method because it's not tied to a particular instance, but even such unbound method is not the same thing as a plain function (it must ensure that its first argument, when called, is an A instance and not any other object).
The "magic" that converts a simple function into an instance method, for old-style classes like yours, was in the Class type itself. For new style classes, the descriptor protocol is used. See http://www.python.org/doc/newstyle/

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Fri May  2 10:43:02 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:43:02 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <87bq3ozs09.fsf@benfinney.id.au>

Roy Smith <roy at panix.com> writes:

> In article <87r6ckzvyv.fsf at benfinney.id.au>,
>  Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> 
> > Whereas if Python is *not* installed from an OS package, it's up
> > to the sys admin to ensure that it works -- not up to my program.
> > So I don't see the point in making it work by default, when what I
> > want for my program is that it works *with the default Python*,
> > not with some non-default installation.
> 
> Ben,
> 
> Have you ever shipped software to a customer?

Yes, and all parties have been quite happy with the results.

> Imagine the following conversation:
> 
> Customer: "Your product is broken. It says it can't find python, and
> I know I have it installed".
> 
> Vendor: "Where do you have it installed?"
> 
> Customer: "In /opt/bin/python"
> 
> Vendor: "Oh, that's your problem, it HAS to be in /usr/bin/python".

At this point the vendor isn't me, because this statement isn't true.
See below.

> Customer: "I can't install it there because <insert whatever silly
> reason the customer has>. If you can't make your product work
> without requiring me to install python in /usr/bin, I'm afraid I
> can't buy your product".

At this point they have the simple option of running the program with
'python /path/to/the/program'. It's certainly not a case of "can't
make the product work".

It is, however, a case of "can't automatically account for every local
customisation sysadmins choose to make on their systems". Perfectly
willing to work with them to get their specific environment working,
but as a matter of simple economics it's not worth my time to attempt
to make such corner cases work automatically.

> If you want to hard-code /usr/bin/python into your application,
> that's your decision. If you would like to take on the task of
> convincing every sysadmin in the world to do things the way you
> think they should be done, have fun.

If they've already chosen to install Python to some unpredictable
location, they know what they're doing enough to invoke the program in
a specific way to get it working.

-- 
 \     Rommel: "Don't move, or I'll turn the key on this can of Spam!" |
  `\                             -- The Goon Show, _Rommel's Treasure_ |
_o__)                                                                  |
Ben Finney


From terry.yinzhe at gmail.com  Sun May 18 11:29:17 2008
From: terry.yinzhe at gmail.com (Terry)
Date: Sun, 18 May 2008 08:29:17 -0700 (PDT)
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
Message-ID: <8c40793e-55bc-48de-96fa-47ebb89b9a88@u36g2000prf.googlegroups.com>

On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
> escribi?:
>
> > Is there a simple way to get all the instances of one class? I mean
> > without any additional change to the class.
>
> Try with gc.get_referrers()
>
> py> import gc
> py> class A(object): pass
> ...
> py> a,b,c = A(),A(),A()
> py> A
> <class __main__.A at 0x00A3F4E0>
> py> for item in gc.get_referrers(A): print type(item)
> ...
> <type 'getset_descriptor'>
> <type 'getset_descriptor'>
> <type 'tuple'>
> <class '__main__.A'>
> <class '__main__.A'>
> <class '__main__.A'>
> <type 'dict'>
> <type 'dict'>
>
> We need to filter that list, keeping only A's instances:
>
> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
> <__main__.A object at 0x00A40E18>]
>
> --
> Gabriel Genellina

Thanks! This is what I'm looking for.


From bruno.desthuilliers at gmail.com  Mon May 26 14:42:08 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 26 May 2008 11:42:08 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com> 
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com> 
	<g18su2$h6c$1@nemesis.news.neostrada.pl>
Message-ID: <ed926a5c-4ee9-44a2-a789-e7f0b83a299f@z72g2000hsb.googlegroups.com>

On 24 mai, 13:01, Piotr Chamera <piotr_cham... at poczta.onet.pl> wrote:
> bruno.desthuilli... at gmail.com pisze:
>
> > I don't know if you'd label it 'elegant', but as far as I'm concerned,
> > storing serialized objects as blobs in a relational database is mostly
> > non-sense. If I use a relational database, it's because it is a
> > *relational* database. If you want an OODB, then we have the ZODB,
> > Durus and a couple others.
>
> It is sometimes convenient to store objects in mature relational
> database backend (reliability,  stability, support, tools,
> replication, etc.). See latst efforts with RelStorage backend
> for ZODB (http://wiki.zope.org/ZODB/RelStorage) - it stores
> pickled Python objects in Oracle, PostgreSQL or MySQL)

You mean a SQL database backend here - the conveniences that you
mention have nothing to do with being relational or not. And that's my
point: pickling objects, you loose of the convenience of a
*relational* database.


From martin.laloux at gmail.com  Thu May 15 03:06:19 2008
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: Thu, 15 May 2008 00:06:19 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
	<3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com> 
	<c610ba4f-a832-451a-a997-1fb02a818e08@n1g2000prb.googlegroups.com>
Message-ID: <125b0b18-7d29-434a-8d8e-6d3fb67ff55f@y21g2000hsf.googlegroups.com>

search, search, it is a recurrent question....
for example

http://groups.google.be/group/comp.lang.python/browse_thread/thread/7bef767753fe40f1/a3fd7c2dd7a50bef?hl=fr&lnk=gst&q=mysqldb+mac#a3fd7c2dd7a50bef


From inhahe at gmail.com  Sat May 17 23:46:50 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 23:46:50 -0400
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <7ENXj.6906$255.106@bignews8.bellsouth.net>

what little I know:

The numbers I heard are that Python is 10-100 times slower than C.  So use 
Python if you can wait 10-100 times longer.  Although it won't really be 
that slow using numpy and/or psyco.

Python seems to have a really extensive reportoire of modules available for 
it.  Although I don't know about things in the math field.  If what you want 
is obscure enough, then you might find it for C/C++ and not Python.  You 
might find out in a few seconds by googling.

The advantage to Python (other than production time), is that it would be a 
lot simpler and more readable simply as a syntax for conveying algorithms. 
It would be like pseudo-code... but runnable. ;)







From cwitts at gmail.com  Fri May 16 02:51:07 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 15 May 2008 23:51:07 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>

On May 15, 5:13?pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> Hi,
>
> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
>
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:
>
> <code>
>
> import win32com.client
> import winshell
>
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
>
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> Firefox'
> shortcut.save()
>
> </code>
>
> This creates the following target path (which doesn't work):
>
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
>
> If I leave the website off, it works. If I leave the path to Firefox
> out, it works too. Is there another method I can use other than
> creating the shortcut by hand and using the shutil module?
>
> Thank you for any ideas.
>
> Mike

Don't set arguments in the path.

shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
shortcut.TargetPath = r'Program Files\Mozilla Firefox\firefox.exe'
shortcut.Arguments = r'https:\www.myCompanyWebsite.com\auth
\preauth.php'
shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
shortcut.save()


From deets at nospam.web.de  Wed May 21 05:46:48 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 11:46:48 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <69i9d8F2ubi9dU1@mid.uni-berlin.de>

boblatest at googlemail.com wrote:

> Hello,
> 
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
> 
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.

This might help:

-----------
s = "foo"

class Tester(object):

    def __call__(self, pattern):
        self.m = re.match(pattern, s)
        return self.m is not None

    def __getattr__(self, name):
        return getattr(self.m, name)

test = Tester()

if test("bar"):
    print "wrong"
elif test("foo"):
    print "right"
-------------


Diez


From mail at timgolden.me.uk  Thu May 29 04:30:33 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:30:33 +0100
Subject: run a script in vista
In-Reply-To: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>
References: <483e67e8$0$30464$afc38c87@news.optusnet.com.au>
Message-ID: <483E69A9.70005@timgolden.me.uk>

Graham Feeley wrote:
> Hi, I have a script which runs in xp, however now I have upgraded to 
> vista this script now does'nt work
> Can someone help with this problem please ?
> this is the start of the script
> 
> import cPAMIE
> import cModalPopUp
> import winGuiAuto as wga
> import time, datetime
> import os, sys, re
> import mx.ODBC.Windows as odbc

You're not helping very much here: what does "now doesn't work" mean?
It doesn't even start? It runs but gives an error? If so, what's the traceback?
etc. etc.

TJG


From inhahe at gmail.com  Thu May 22 18:36:15 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:36:15 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
Message-ID: <LymZj.61584$3v1.36344@bignews3.bellsouth.net>

it seems like you can't do it exactly the way you're trying but you could do 
this

def __getitem__(*args):
  if len(args) > 1 and args[1]:  return self.get(args[0]) * 5
  return self.get(args[0])

then you would use it like

print foo['a']
print foo['a',True]
or even
print foo['a',"crazy"]
if you wanted.
or
crazy = True
print foo['a',crazy]




"Andreas Matthias" <amat at kabsi.at> wrote in message 
news:uf6hg5-ca9.ln1 at buckbeak.hogwarts...
> The following code doesn't run but I hope you get what I
> am trying to do.
>
>
> class my_dict (dict):
>
>    def __getitem__ (self, key, crazy = False):
>        if crazy == True:
>            return 5 * self.get(key)
>        else:
>            return self.get(key)
>
>
> foo = my_dict()
> foo['a'] = 123
>
> print foo['a']
> print foo['a', crazy = True]
>
>
> Is it somehow possible to overload __getitem__ with an additional
> argument? Are there other possibilities to achiev this? Or is
> the only solution to this to write a normal function call
> `def my_get (self, key, crazy=False)'?
>
>
> Ciao
> Andreas 




From kyosohma at gmail.com  Tue May 20 15:58:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 12:58:40 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
	<mailman.1395.1211312728.12834.python-list@python.org>
Message-ID: <f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>

On May 20, 2:45?pm, Tim Golden <m... at timgolden.me.uk> wrote:
> Bob Greschke wrote:
> > This MUST have been asked before, but I can't seem to Google the right
> > thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> > "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>
> A couple of options to get the ball rolling:
>
> 1) win32api.GetLogicalDriveStrings()


I gave this a go to see how it worked and ti gave me this:

'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'

Not exactly what I expected. Do I have to parse out the "\\\x00"
myself or is there an information level switch I should add?

>
> 2)http://timgolden.me.uk/python/wmi_cookbook.html#find-drive-types


This works as advertised. I was actually going to post that, but you
beat me to it.  :)

>
> TJG


Mike


From hdante at gmail.com  Thu May 15 19:42:24 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 23:42:24 +0000 (UTC)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org>
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com>
	<8AEDA5E3386EA742B8C24C95FF0C75800403F7BC@PDC-MAIL3.ubisoft.org>
Message-ID: <g0ihp0$6k1$1@ger.gmane.org>

Em Thu, 15 May 2008 19:20:58 +0200, Andreas Tawn escreveu:

>>print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
>>\training_set') returns False...
>>
>>i have thourogly checked the filename to be correct and if we assume it
>>is what could this mean then?
>>i had a problem one other time when i had renamed a file but windows
>>didnt rename it compeltely apparently.
> 
> It's escape characters again.
> 
> You're asking for
> 'C:\Users\saftarn\Desktop\NetFlixDataSet\training_set', but Python
> interprets that as 'C:\Users\saftarn\Desktop\NetFlixDataSet
> raining_set', which probably doesn't exist.
> 
> The first example works by accident because backslash plus the first
> letter of each folder in your path happens to not match any of Python's
> string formatting characters.
> 
> Use forward slashes or double up the backslashes to stop this happening.
> 
> Cheers,
> 
> Drea

 Hint: standardize the way you write paths in python:

import os.path
def _p(*x):
    return os.path.normpath(os.path.expanduser(os.path.join(*x)))

(in my system)

In [10]: print _p('abcd.txt')
abcd.txt

In [11]: print _p('~/abcd.txt')
/home/hdante/abcd.txt

In [12]: print _p('~/abcd/efgh.txt')
/home/hdante/abcd/efgh.txt

In [13]: print _p('~', 'abcd', 'efgh.txt')
/home/hdante/abcd/efgh.txt



From dullrich at sprynet.com  Tue May 27 08:49:00 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 07:49:00 -0500
Subject: decorators when?
Message-ID: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>

What version added decorators (using the
@decorator syntax)?

(Is there a general way I could have found out the answer myself?)

Is there a somthing such that "from __future__ import something"
will make decorators work in 2.5.2?


David C. Ullrich


From gandalf at shopzeus.com  Wed May 14 16:36:07 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 14 May 2008 22:36:07 +0200
Subject: Submitting data to HTTPS javascript
In-Reply-To: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>
References: <8e087c6d0805141119y7637732cr37288492d7601f27@mail.gmail.com>
Message-ID: <482B4D37.9080100@shopzeus.com>

John Chandler wrote:
> I am trying to write a script to test certain functionality of a 
> website that requires users to login. The login page is simple, a few 
> pictures and two text bars (one for username and one for password). I 
> tried logging in with webbrowser, but that did not work because the 
> page uses javascript. I also tried using win32com though I have no 
> idea what I am doing. Any ideas?
- Use firefox :-)
- Install "LiveHTTPHeaders" http://livehttpheaders.mozdev.org/
- Open the plugin in one window and the website in another
- Enable "capture" in livehttpheaders (default)
- Login to the website
- Disable "capture" in livehttpheaders (default)
- Check the GET and POST requests in the capture log
- Try to send the same GET and POST requests from Python.
- Don't forget that most sites will also need cookies - you have to 
extract and send back cookies as needed

You do not need any GUI component for this job.

Other good things to have:

- Good knowledge of the "re" standard module, and regular expression syntax
- BeautifulSoup (especially ICanBelieveItIsBeautifulSoup...)

You might also check the "mechanoid" project. (I have never used it but 
it is said to be an automatized, controllable web browser???)

If anyone is interested, I can put up a python recipe that shows how to 
emulate a browser easily.

Best,

    Laszlo



From castironpi at gmail.com  Wed May 14 13:51:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:51:43 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com>
Message-ID: <499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com>

On May 14, 5:25?am, castiro... at gmail.com wrote:
> On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > you can safely ignore its posts.
>
> > > > How does it generate text?
>
> > > My guess is by inhaling a lot of intoxicants.
>
> > However you know what would be helpful? ?If I could go to the right
> > place to start the ring.
>
> I have a slightly sinister role on stage. ?Does anyone want to play?

I'd stay on mutability for the world domination factor.  Fluent
currency is buoyant currency; turn on a local clock, and someone gets
some cubic verticals.

Now if sense-reference is trading on the BDFL, I'm still holding Tron
can pretty well win work.


From eric at pixelwareinc.com  Tue May 13 18:09:17 2008
From: eric at pixelwareinc.com (Eric Anderson)
Date: Tue, 13 May 2008 15:09:17 -0700 (PDT)
Subject: Purpose of operator package
Message-ID: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>

I mainly work in other languages (mostly Ruby lately) but my text
editor (Scribes) is python. With python being everywhere for dynamic
scripting I thought I would read the source to learn the language
better (I've gone through some basic tutorials but I always prefer to
learn from real source).

So right from the start I see the following:

from operator import truth
if truth(argv):
  # blah blah blah

It is obvious they are testing to see if any command line arguments.
But curious for why the function is needed. So I look up the operator
package and fine it provides functions that are equivalent to the
native operators. So my question is why would someone right the above
instead of just

if argv:
  # blah blah blah

Seems like unnecessary code but obviously I know nothing about Python.

Thanks for any pointers!


From fuzzyman at gmail.com  Sat May 24 10:10:15 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 07:10:15 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>

On May 24, 2:44 pm, Roy Smith <r... at panix.com> wrote:
> In article
> <af66b0d4-f77d-4d54-8ee0-94592497d... at l64g2000hse.googlegroups.com>,
>
>  Fuzzyman <fuzzy... at gmail.com> wrote:
> > Also, like others, I have had wonderful experiences of trying to track
> > down test failures that depend on the order that tests run in. Having
> > interdependencies between tests is a recipe for madness...
>
> I agree that tests should not depend on each other, but sometimes it's
> still useful to have the tests run in a certain order for reporting
> purposes.
>
> If you're doing requirements tracking, it's nice to have the tests execute
> in the same order as the requirements are listed.  It makes interpreting
> the output easier.  Sure, you could give the test cases names like
> "test_fr17.3a" and write your own getTestCaseNames(), but just putting them
> into the file in the order you want them to run is easier.  And making
> things easy is what this is all about.

Whilst I understand your point, I think the danger is that you end up
with hidden dependencies on the test order - which you're not aware of
and that the tests never expose. Certainly layout your tests in a
logical order within the file, but I think you risk potential problems
by controlling the order they are run in. Other frameworks
specifically provide test order randomizers for this very reason.

A worthwhile question for the OP - your patch seems fairly simple. Is
it easy for you to extend unittest for your own testing needs by
subclassing?

Unittest should definitely be easy for people who *want* this to add
it to their own testing environment.


All the best,


Michael Foord
http://www.ironpythoninaction.com/


From s0suk3 at gmail.com  Wed May 28 03:58:32 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Wed, 28 May 2008 00:58:32 -0700 (PDT)
Subject: Does this path exist?
Message-ID: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>

I wanted to ask for ways to test whether a path exists. I usually use
os.path.exists(), which does a stat call on the path and returns True
if it succeeds, or False if it fails (catches os.error). But stat
calls don't fail only when a path doesn't exist. I see that, at least
on Windows, the instance of the exception has an attribute 'errno' set
to 2 when it fails because the path doesn't exist. Is it a portable
solution to rely on this (haven't tried it on Linux)? Are there other
ways of testing whether a path exists?

Thanks,
Sebastian


From daniel.a.esch at gmail.com  Tue May 13 17:59:24 2008
From: daniel.a.esch at gmail.com (Dan Esch)
Date: Tue, 13 May 2008 17:59:24 -0400
Subject: Learning Python and the Zen of the Mailing List
Message-ID: <fe50b9600805131459l3789cb0cof861b895cb4853c4@mail.gmail.com>

I decided to learn Python.

I decided to learn Python because I hate visual basic for applications and I
can feel my brain shrink everytime I invoke that freaking macro editor.
It's bad enough that Mwfdg Q%$#@%soft <MwfdgQ%$#@%sft>  had to eliminate the
original simple keystroke macro tools that were enough for us
knuckle-dragging accounting types - oh no! - they had to replace that tool -
that we understood - with the most brain dead, useless, overwrought piece of
crap abuse of programming language.

This forced me to learn how to program.  As I learned how to program, I
learned that Visual Basic wasn't as bad as I thought - it was far, far, far
worse.... I went to Dartmouth, and, Bill, you harvard dropout, I'd like to
inform you that President Kemeny is spinning in his grave for the
perversions you have inflicted upon his undergraduate-teaching-tool
toy-language.

So I write little toy programs and try to wrap my head around real
object-oriented programming and and real algorithms and data structures and
design my scratch-my-own-itch application in my head while I study.

In the mean time, I lurk on this mailing list - I don't have any real
questions yet - but reading the questions and answers has been a great way
of tapping into the pythonic Zen - I don't know if anyone is a similar
situation to me, but I recommend just randomly browsing the mailing list as
a means of getting in tune with the rhythm and esthetics of the language

Dan
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From bruno.desthuilliers at gmail.com  Mon May 19 16:53:31 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:53:31 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org> 
	<g0m9or$2qk0$1@news.mtu.ru>
Message-ID: <10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>

On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:
> > En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
> > <ivan.illario... at gmail.com> escribi?:
>
> >> After re-reading "Python is not Java" I finally came to conclusion that
> >> classmethods in Python are a very Bad Thing.
>
> >> I can't see any use-case of them that couldn't be re-written more
> >> clearly with methods of metaclass or plain functions.
>
> > A good use case for class methods are alternate constructors, like
> > dict.from_keys. I don't think an alternate constructor would be more
> > clear being a method of the metaclass - actually it belongs to the class
> > itself, not to its metaclass.
> > Metaclass methods are harder to find; they don't show in dir(instance)
> > nor dir(class).
> > Also the resolution order is harder to grasp for metaclasses - but this
> > may be just lack of usage from my part...
>
> >> They have the following issues:
> >> 1. You mix instance-level and class-level functionality in one place
> >> making your code a mess.
>
> > Not necesarily; some classmethods are naturally tied to the class
> > itself, not to the metaclass (like the constructor example above). But
> > yes, *some* classmethods could be written as methods of their metaclass
> > instead - but that doesn't always make sense.
>
> >> 2. They are slower than metaclass methods or plain functions.
>
> > Hu? How did you come to that?
> > I've done a small test and a class method wins by a very minuscule but
> > consistent advantage over a metaclass method:
>
> > class A(object):
> >      color = "red"
>
> >      @classmethod
> >      def foo(cls, x):
> >          return getattr(cls, x)
>
> > class MetaB(type):
> >      def foo(self, x):
> >          return getattr(self, x)
>
> > class B(object):
> >      __metaclass__ = MetaB
> >      color = "red"
>
> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> > "A.foo('color')"
> > 1000000 loops, best of 3: 1.19 usec per loop
>
> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
> > "B.foo('color')"
> > 1000000 loops, best of 3: 1.2 usec per loop
>
> How did I come to this:http://code.djangoproject.com/changeset/7098
>
> I measured this and there was a marginal speed increase when classmethods
> wher moved to metaclass.

IIRC (please correct me if I'm wrong), this part of code is only
called when the class is created - in which case it makes sense to
move it where it belongs, ie to the metaclass. This is by no mean a
use case for classmethods.




From gherron at islandtraining.com  Sun May 11 19:50:17 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 16:50:17 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <48275A1F.5080606@bc90021.net>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>	<m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<48275955.4000106@islandtraining.com>
	<48275A1F.5080606@bc90021.net>
Message-ID: <48278639.9090701@islandtraining.com>

bc90021 wrote:
> You are a perfect example of exactly what I was talking about, and why 
> the Python community is such a poor one.

I though you were treated quite fairly all things considered.   (You 
started the personal attacks, the whining about the group, the 
accusations of arrogance, and the refusal to believe we all *knew* the 
error was in your file name calculation and not in Python threads.)

This group is widely acknowledged as one of the more friendly groups 
around,  and in fact we keep it that way by coming down rather hard on 
those who abuse either the members of the group or the purpose of the 
group.  And you've done both and been reprimanded for it.   Now, either 
go away, or change your attitude and join the group. (You would be 
welcome if the attitude changed.)  Either way, this group will be it's 
usual friendly self.


Gary Herron



>
> Gary Herron wrote:
>> bc90021 wrote:
>>>> ...and the exact error message was?
>>>>
>>>> Here is a tip: if you want people to help you, then you have to help
>>>> them to help you.  Personally, I wouldn't respond to anymore of your
>>>> questions because you seem incapable of posting the information 
>>>> that was
>>>> requested.
>>>>     
>>>
>>> So far, the people who have answered this post have gone on the 
>>> assumption that I'm stupid.  I'm not.  I took perfectly working 
>>> code, cut it from one class, and put it in another.  It stopped 
>>> working in the second class.  I've spent days on this and trust me, 
>>> given what I've experienced of the Python community so far, if I 
>>> didn't have to ask, I wouldn't.
>>>
>>> (I really must say that so far the help I am getting in the Python 
>>> community is a big let down.  Whether it's on IRC or here, everyone 
>>> has an arrogance that I don't find anywhere else in the open source 
>>> community, and it seriously makes me question the choice of language 
>>> that I've made.)
>>>   
>>
>> Sorry, the arrogance is yours.
>>    Expecting us to help with only partial information.
>>
>>    Expecting us to help when your posts of the error message changes 
>> from one post to the next.
>>
>>    Expecting us to help when you refuse to post the traceback.
>>
>>    Expecting us to believe that it has anything to do with threads.  
>> (No one believes that for a moment.)
>>
>>
>> While acknowledging that any piece of code may have bugs, Python's 
>> threading included, the problem here looks to be some simple mistake 
>> in the computation of the name of the file to be opened.   Then I 
>> look at the convoluted quoting surrounding your computation of the 
>> file name, and my confidence in that as an explanation sky-rockets.  
>> Then someone in another post has found an extra set of quotes 
>> embedded in your filename you compute, and it's clear that we are on 
>> the right track.
>>
>>
>>
>>> The error message was at the top of the thread (am I incapable of 
>>> posting it, or are you incapable of following a thread?), but here 
>>> it is again:
>>>
>>> IOError: [Errno 2] no such file u'tempfileName'
>>>
>>> -- 
>>> http://mail.python.org/mailman/listinfo/python-list
>>>   
>>
>>
>>
>



From castironpi at gmail.com  Sat May 10 07:53:52 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 04:53:52 -0700 (PDT)
Subject: Pythonicity of some algorithms
References: <mailman.898.1210413757.12834.python-list@python.org> 
	<4825770e$0$25961$9b622d9e@news.freenet.de>
Message-ID: <47927ab3-186e-4a9f-901d-3d15b69c165b@b64g2000hsa.googlegroups.com>

On May 10, 5:21?am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > This works for me. But I'd like to know if this is considered
> > Pythonic, and if there are other, better ways of doing the above in
> > Python.
>
> From the Python point of view, it's fine. However, it uses busy-wait,
> which I consider bad style (in any language).
>
> > 3) Make a custom thread-safe queue class, with an 'interrupt_get'
> > method. When your app calls queue.interrupt_get(), all threads
> > currently locking on a queue.get() will continue, but with a
> > GetInterrupted exception thrown.
>
> That's what I would do. I'd use the existing Queue class as a base
> class, though, rather than starting from scratch.
>
> Regards,
> Martin

Did you follow the links to Dev-C++?  It rules house.  I have
drizzle.c compiling in Windows GDI and SDL.  I'm poised to double-time
Dev-C++ and Windows GDI, if double-tasking is on the market.  Credit
up... what's standard?


From george.maggessy at gmail.com  Thu May 22 20:48:57 2008
From: george.maggessy at gmail.com (George Maggessy)
Date: Thu, 22 May 2008 17:48:57 -0700 (PDT)
Subject: MVC
Message-ID: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>

Hi Gurus,

I'm a Java developer and I'm trying to shift my mindset to start
programming python. So, my first exercise is to build a website.
However I'm always falling back into MVC pattern. I know it's a
standard, but the implementation language affects the use of design
patter. So, here goes my question. Is that OK if I follow this? Should
I create DAOs, View Objects, Controllers and etc? Is there any sort of
best practice / standard to Python?

Cheers,
George


From rpdooling at gmail.com  Tue May 13 20:58:59 2008
From: rpdooling at gmail.com (Rick Dooling)
Date: Tue, 13 May 2008 17:58:59 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
Message-ID: <3ca0d360-5d71-42e9-a06f-8edf26388ff2@y38g2000hsy.googlegroups.com>

On May 13, 7:29 pm, Con <conra... at gmail.com> wrote:
> Hi, how does properly install the Python MySQL db module for Mac OS
> X?  I was only able to locate the Win32 modules.
>
> Thanks in advance,
>
> -Conrad

I tried this a couple of weeks ago using macports and had problems.

See, for example:

http://www.davidcramer.net/code/57/mysqldb-on-leopard.html

I read about several people who went in and edited the source files to
work out the bugs on Leopard, but instead I just changed my Python
code to use SQLite for the moment until someone fixes MySQLdb. There's
a nice Perl script that will convert your MySQL db to an SQLite db if
you're interested.

RD


From eduardo.padoan at gmail.com  Tue May 20 19:56:59 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Tue, 20 May 2008 20:56:59 -0300
Subject: What is wrong with my Python threading?
In-Reply-To: <op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
	<op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <dea92f560805201656v2417eaf3s3e3ef4a13bfeec6b@mail.gmail.com>

On Tue, May 20, 2008 at 8:24 PM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 20 May 2008 10:28:51 -0300, castironpi <castironpi at gmail.com>
> escribi?:
>
>> You meant 'thd1.start( )' and 'thd2.start( )'.
>
> Wow! A message with a high S/N ratio coming from you!
> And it's not the first I've seen - whatever pills you're taking, they're
> good for you...

This is why I shouldn't be so eager adding people to the killfile.


-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt

From gagsl-py2 at yahoo.com.ar  Wed May 14 02:26:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 03:26:41 -0300
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
	<mailman.1039.1210675135.12834.python-list@python.org>
	<bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
	<482A286B.3090504@al.com.au>
Message-ID: <op.ua4r6rumx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 20:46:51 -0300, Astan Chee <stanc at al.com.au> escribi?:

> Sorry, I mean functions not classes. Well, actually, one is a class and
> another is a function. So when the script (its a free game btw) runs, it
> instantiates the first class and somewhere in the middle of processing
> the first class, I need to call a function as a separate thread, I also
> want to wait for the function to complete and I was wondering how python
> handles the thread of this function? Does it die when the function
> completes? Anyway, I know it sounds silly to have 2 threads when I can
> do it with one, but Im using wx to render opengl objects using pygame.
> So it has to be a separate thread, otherwise wx wont play nice. Is there
> a simple example of how I can do this?

That's why I asked about the GUI library used. For wx see  
http://wiki.wxpython.org/LongRunningTasks

-- 
Gabriel Genellina



From google at mrabarnett.plus.com  Wed May 21 21:49:37 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 18:49:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com> 
	<afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com>
Message-ID: <12071a08-5c5d-4541-bc34-ed1f1ac4e96f@8g2000hse.googlegroups.com>

On May 21, 8:34 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 21, 1:14 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
>
> > I wonder whether "is" could be used both for "x is value" and "x is a
> > type" without causing a problem:
>
> > If command is a string ...
>
> > If command is "quit" ...
>
> I think you are right.  I like "If command is "quit" ...".  For a user
> who wasn't mathemetically inclined and was doing mainly string
> manipulation, I think it might be easier to read than the equivalent
> "If command = "quit" ...".  By making them exactly equivalent, I can't
> think of any confusion that might induce bugs.  If you think of any
> drawbacks, please let me know.
>
I've thought of one possible drawback: "a" and "an" can be used as
variables, so the "is a" part might cause a problem. You'd need to
check the parser to find out...

> Otherwise, I'll put it in the next
> time I update the parser (probably this weekend).  Thank you again for
> your suggestions.



From bronger at physik.rwth-aachen.de  Thu May  1 01:12:41 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 07:12:41 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
Message-ID: <87iqxyboae.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

> On Apr 30, 9:11 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Sam <landofdre... at gmail.com> writes:
>> > I also have a problem with relative import; I can't for the life of me
>> > figure out how to use the damn thing. I think the main problem is with
>> > getting Python to recognize the existence of a package. I have
>>
>> > S/
>> >   p.py
>> >   B/
>> >     b.py
>> >   W/
>> >     pyw/
>> >       u.py
>> >       ws.py
>>
>> > and I'd like to get u.py to import all the other 3 programs. I put
>> > empty __init__.py files in all of the above directories (is this
>> > necessary?), and even manually added the pathway (r'C:\Myname\S') to
>> > sys.path, but when I execute
>>
>> > from S import p
>>
>> > in u.py Python gives "ImportError: No module named S".
>>
>> A silly question: is the directory that contains "S" in PYTHONPATH or
>> in sys.path?
>
> It's in sys.path.

"S" or its parent directory?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From hat at se-162.se.wtb.tue.nl  Tue May  6 12:10:01 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 18:10:01 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <slrng210mp.cfa.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, jmDesktop <needin4mation at gmail.com> wrote:
>
> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too.  On the dynamic typing,

I don't understand your reasoning. What part does 'this' refer to?
Also, you are wrong.
We teach 2nd year Bachelor students about programming (the process of solving a
problem by making a computer program, which is not the same as coding) with
Python.

> isn't that the same sort of thing that lots of scripting languages
> do?  VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in

VB was not designed well in that case.

I believe that VB is popular becomes it comes from the same firm that also
sells the OS and the word processor of all school computers. Also, many
teachers make a choice based on what others do or what they know,
rather than what the best possible prog language is for students.

Also, industry wants to have graduates that know the language they use.
It is very easy to give in to that desire, although it is not very useful,
since industry changes its programming language every so many years.


> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  Thanks.

That's normal (and healthy, probably).

The thing that should really scare you however is your idea that everything
done in the Java/C# way does make sense (ie you are trying to push Python in
the 'yet another hammer' concept rather than treating it as a shiny newly
invented tool used by many others already).

Unlike what you think, all languages including Java and C# have their
weaknesses. However, you can only see weak points from outside the Java/C#
world (by knowing other languages that handle the same problems in a better
way).


(sorry if I offended you with the last bit, I did not intend to attack you
personally, just trying to provoke you enough to make you wonder about your
implicit assumptions.)

Sincerely,
Albert



From daveparker at flamingthunder.com  Tue May 13 11:24:35 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 08:24:35 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>

>  The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.

Perhaps.  Flaming Thunder is only $19.95 per year for an individual
(and even less per individual for site licenses), which is less than
the cost of just one book on Python.

I think that many people will find that Flaming Thunder is easier to
use and understand than Python -- so for many people the amount of
time they save will be worth more than the cost of Flaming Thunder
(unless, of course, their time is worth $0).

Also, several users have rewritten their Python programs in Flaming
Thunder, and found that Flaming Thunder was 5 to 10 times faster
(Flaming Thunder compiles to native executables).  So again, since
many people value their time at more than $0, I think that many people
will find that Flaming Thunder is worth $19.95 per year.

Plus, me getting paid to work on Flaming Thunder is far more
motivating than me not getting paid to work on Python.  This weekend,
Python users will still be debating how to fix awkwardnesses in the
languages (such as FOR loops where you're just counting the loops and
not referencing the loop variable) -- but Flaming Thunder users will
be getting work done using the REPEAT n TIMES constructs that I'll be
implementing.

Python has been around about 15 years, yet still has those
awkwardnesses.  Flaming Thunder has been out less than 6 months and
those awkwardnesses are already getting fixed.  The difference: I
can't afford to ignore users.

But the future is one of the hardest things to predict, so we'll see.

On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
> On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > Don't let yourself be irritated by castironpi
>
> > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > interaction.
>
> > Not this interaction, I'm afraid. ?What irritates *me* about
> > castironpi is that he uses a chatterbot to clutter up the threads
> > here. ?If you go back to his postings from a year ago (and selected
> > ones since), his comments are coherent and sensible. ?These rambling
> > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > his idea of a joke. ?But they are certainly not worth your time in
> > trying to respond to them.
>
> > -- Paul
>
> ?I don't think castironpi so annoying that I should filter its
> messages. It would be enough if he were better tuned. He is much
> smarter than the emacs shrink, for example. :-P
>
> ?The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.- Hide quoted text -
>
> - Show quoted text -



From bearophileHUGS at lycos.com  Thu May 15 13:46:30 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Thu, 15 May 2008 10:46:30 -0700 (PDT)
Subject: Fast Mersenne Twister
Message-ID: <8750298b-b4c9-4089-b01c-d00f2453ee69@k13g2000hse.googlegroups.com>

This may be interesting for Python developers of the random module,
"SIMD-oriented Fast Mersenne Twister (SFMT): twice faster than
Mersenne Twister":

http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/

One function may be useful to generate integers (randint, randrange,
choice, shuffle, etc), the other for floating point values (random)
faster than the current Mersenne Twister used in the random module.

Bye,
bearophile


From iainking at gmail.com  Fri May 23 04:24:39 2008
From: iainking at gmail.com (Iain King)
Date: Fri, 23 May 2008 01:24:39 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com> 
	<mailman.1493.1211510178.12834.python-list@python.org>
Message-ID: <e47233a9-83af-4042-ac86-c609a5de9bef@e53g2000hsa.googlegroups.com>

On May 23, 3:35 am, Charles Hixson <charleshi... at earthlink.net> wrote:
> On Thursday 22 May 2008 13:30:07 Nick Craig-Wood wrote:
>
> > ...
> > >From Armstrong's book: The expression Pattern = Expression causes
>
> > Expression to be evaluated and the result matched against Pattern. The
> > match either succeeds or fails. If the match succeeds any variables
> > occurring in Pattern become bound.
>
> > It is a very powerful idea and one which (along with the concurrency
> > and message passing from Erlang) has been implemented for python :-
>
> >  http://candygram.sourceforge.net/
>
> > I've been reading the Erlang book and I have to say it has given me a
> > lot of insight into python...
>
> Although when comparing Candygram with Erlang it's worth noting that Candygram
> is bound to one processor, where Erlang can operate on multiple processors.
> (I'd been planning on using Candygram for a project at one point, but this
> made it unusable.)

lol, nice name.  Also surprisingly relevant to the thread:

candygrammar: n.

    A programming-language grammar that is mostly syntactic sugar; the
term is also a play on ?candygram?. COBOL, Apple's Hypertalk language,
and a lot of the so-called ?4GL? database languages share this
property. The usual intent of such designs is that they be as English-
like as possible, on the theory that they will then be easier for
unskilled people to program. This intention comes to grief on the
reality that syntax isn't what makes programming hard; it's the mental
effort and organization required to specify an algorithm precisely
that costs. Thus the invariable result is that ?candygrammar?
languages are just as difficult to program in as terser ones, and far
more painful for the experienced hacker.


From detlev at die-offenbachs.de  Sun May  4 04:58:29 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 04 May 2008 10:58:29 +0200
Subject: ANN: eric 4.1.3 released
Message-ID: <fvjtrl$hkn$3@online.de>

Hi,

I'd like to inform everybody about the immediate availability of eric
v4.1.3. This is a bug fix release.

It is available via http://www.die-offenbachs.de/eric/index.html.

What is eric?
-------------
eric is a Python IDE written using PyQt4 and QScintilla2. It comes with
all batteries included. For details please see the above link.

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From zentraders at gmail.com  Mon May 26 14:50:43 2008
From: zentraders at gmail.com (Zentrader)
Date: Mon, 26 May 2008 11:50:43 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c91fd23b-1f39-445c-be15-acd2edea0524@p25g2000pri.googlegroups.com>

On May 26, 11:34 am, notnorweg... at yahoo.se wrote:
> what is the definition of a highlevel-language?

It is relative.  A low-level language is lower/closer to the
computer's binary code.  C/C++ is a high-level language compared to
assembly.  Python is high-level vs. C/C++.  Python is low-level
compared to "spreadsheet programming", although some spreadsheets like
Gnumeric can use Python extensions.


From wuwei23 at gmail.com  Fri May 23 22:00:20 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:00:20 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
Message-ID: <d8818486-b89c-4faf-8000-5b0ec740d053@w34g2000prm.googlegroups.com>

On May 24, 7:14 am, nayden <nay... at gmail.com> wrote:
> the execution fails just after the print statement, and I am not quite
> sure why is that.

It's often helpful to include the traceback, or at the very least the
last 3-4 lines of it, as it helps everyone work out the issue you're
having.

If you're not sure which line in a function is causing the issue, try
commenting out all but the first, run-and-test, re-add the next, run-
and-test etc

But the error is most likely this line:
>     i = cPickle.load(str)

cPickle.load unpickles from a file, but here you're handing it a
string. You want cPickle.loads.

At the interpreter, you can always quickly check these out by looking
up the docstring via 'help(cPickle.loads)' (or 'cPickle.loads?' if
you're using iPythhon).

- alex23


From benjamin.kaplan at case.edu  Fri May 30 18:49:14 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 30 May 2008 18:49:14 -0400
Subject: SMS sending and receiving from website?
In-Reply-To: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
Message-ID: <ec96e1390805301549j71a738efhc991bae0f4fae33e@mail.gmail.com>

On Fri, May 30, 2008 at 5:08 PM, globalrev <skanemupp at yahoo.se> wrote:

> can i send and receive messages from a website using python?
>
> how would that work with costs? would the mobileowner pay both ways?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I believe that there is a way to use Django to send messages, but I've never
used it myself and I don't know about recieving messages.
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From rsoh.woodhouse at googlemail.com  Wed May 28 17:19:40 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 14:19:40 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
Message-ID: <b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>

On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> rsoh.woodho... at googlemail.com schrieb:
>
> >>> Hi,
> >>> I'm trying to work out some strange (to me) behaviour that I see when
> >>> running a python script in two different ways (I've inherited some
> >>> code that needs to be maintained and integrated with another lump of
> >>> code). The sample script is:
> >>> # Sample script, simply create a new thread and run a
> >>> # regular expression match in it.
> >>> import re
> >>> import threading
> >>> class TestThread(threading.Thread):
> >>>     def run(self):
> >>>         print('start')
> >>>         try:
> >>>             re.search('mmm', 'mmmm')
> >>>         except Exception, e:
> >>>             print e
> >>>         print('finish')
> >>> tmpThread = TestThread()
> >>> tmpThread.start()
> >>> tmpThread.join()
> >>> import time
> >>> for i in range(10):
> >>>     time.sleep(0.5)
> >>>     print i
> >>> # end of sample script
> >>> Now if I run this using:
> >>> $ python ThreadTest.py
> >>> then it behaves as expected, ie an output like:
> >>> start
> >>> finish
> >>> 0
> >>> 1
> >>> 2
> >>> ...
> >>> But if I run it as follows (how the inherited code was started):
> >>> $ python -c "import TestThread"
> >>> then I just get:
> >>> start
> >>> I know how to get around the problem but could someone with more
> >>> knowledge of how python works explain why this is the case?
> >> Works for me. And I don't see any reason why it shouldn't for you -
> >> unless you didn't show us the actual code.
>
> >> Diez
>
> > Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> > on Ubuntu 7.10. Which version of python/what platform were you using?
>
> mac-dir:/tmp deets$ python
> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> Welcome to rlcompleter2 0.96
> for nice experiences hit <tab> multiple times
>  >>>
>
> But I doubt this changes anything.
>
> Diez

Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
Python 2.4.5 on Debian and get the same results as I had before.

Thanks,
Rowan


From tinnews at isbd.co.uk  Fri May 23 14:59:39 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 23 May 2008 18:59:39 GMT
Subject: Python database 'frontends', what's available?
Message-ID: <4837141b$0$658$bed64819@news.gradwell.net>

I'm desperately trying to move a Microsoft Access database application
(a simple accounts system I wrote myself) to Linux.  Python is one of
my preferred programming laguages so I wonder if there are any good
Python 'frameworks' for writing database applications, in particular I
need good reporting and forms writing facilities.  The basic database
and logic/arithmetic seem fairly simple to me.

-- 
Chris Green


From bignose+hates-spam at benfinney.id.au  Tue May 27 19:04:52 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 28 May 2008 09:04:52 +1000
Subject: When was feature FOO added to Python? (was: decorators when?)
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <87zlqbs60b.fsf@benfinney.id.au>

David C. Ullrich <dullrich at sprynet.com> writes:

> What version added decorators (using the @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)

For standard library features, the documentation for a module
<URL:http://www.python.org/doc/lib/> usually says "(New in 2.4)" or
"(Changed in 2.4)" or the like for features that appeared in a
particular version. I think this is manually done by the
documentation maintainers, though.

For features of the language (like decorators), the language reference
<URL:http://www.python.org/doc/ref/> is the place that *describes* the
features; but I don't see any similar "(New in 2.4)" annotations, so
e.g. <URL:http://www.python.org/doc/ref/function.html> doesn't mention
when the decorator syntax appeared in the language.

Any documentation maintainers reading: Please consider updating the
documents to give this useful "(New in 2.x)" or "(Changed in 2.x)"
annotation for just such a situation.

You can get closer to the answer by browsing the "What's New in
Python" <URL:http://www.python.org/doc/2.4/whatsnew/> documents by
version.


From lists at cheimes.de  Thu May 29 10:31:03 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 29 May 2008 16:31:03 +0200
Subject: seg. fault with Py_BuildValue?
In-Reply-To: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <g1men7$c48$1@ger.gmane.org>

Christian Meesters schrieb:
> Hi
> 
> I'm having trouble with Py_BuildValue. I was able to pinpoint the following
> statement as the one causing a seg. fault with my script:
> 
> static PyObject * funcname(PyObject *self, PyObject *args) {
> ....
>   return Py_BuildValue("(OO)", x, y);
> }
> where x & y are both of type PyObject.
> 
> Any suggestions here? Do I need to handle the output of Py_BuildValue
> somehow before returning? How? Need to decref x & y before returning?

Check if either x or y are NULL.

Christian



From miller.paul.w at gmail.com  Mon May 26 15:22:24 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:22:24 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>

On May 26, 3:02?pm, notnorweg... at yahoo.se wrote:

> what is crazy about it?

To make, say, a Python machine fast, you'd have to optimize the hell
out of the architecture, probably all the way down to the microcode
level.  Thus, a hypothetical hardware-based Python machine would look
very little like other, more conventional chips like x86 or ARM, for
instance.  In fact, I suspect it'd look a lot like the CPython virtual
machine on an instruction level.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:03:05 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:03:05 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
Message-ID: <482c428c$0$9669$426a34cc@news.free.fr>

Arnaud Delobelle a ?crit :
> 
> bruno.desthuilliers at gmail.com wrote:
>> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
>>>> On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
>>>>> __new__ is a static method!
>>>> __new__ is a special-cased staticmethod that  1/ must not be declared
>>>> as such and 2/ takes the class object as first args. As far as I'm
>>>> concerned, it's semantically a classmethod.
>>> It's a static method!
> 
> OK then let me reply pedantically:
> 
>> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
>> a staticmethod object. What I say is that
>> 1/ it's special-cased since you don't *explicitely* declare it as a
>> staticmethod
> 
> In some cases you have to:
> 
> class Foo(object): pass
> 
> # Later on I want to redefine Foo.__new__
> 
> @staticmethod
> def Foo__new__(cls):
>     print "new Foo!"
>     return object.__new__(cls)
> 
> Foo.__new__ = Foo__new__
> 
>>>> Foo()
> New Foo!
>>>> # Without the @staticmethod we would get a TypeError

Point taken. But you'll admit that monkeypatching the __new__ method is 
somewhat uncommon !-)

>> 2/ it behaves 

<nb>
Poor word choice here I'm afraid - of course a staticmethod doesn't 
"behave" like a classmethod object. But you of course __knew__ what I 
meant !-)
</nb>

>> just like a classmethod, since it takes the class as
>> first argument.
> 
> When you invoke it implicitely maybe, but not when you do so
> explicitely!

I'm not talking about how you invoke it (FWIW, direct invocation of 
__new__ is pretty rare, parent call excepted - and then, well, it mostly 
mirrors a direct parent call within an overridden instance method). It's 
about having __new__ taking the class as first argument.

FWIW, I wonder why the BDFL choosed to implement __new__ as a 
staticmethod - there are probably some pretty good reasons, but not 
knowing them, it looks like __new__ would have been a perfect candidate 
for a classmethod.

So far, the only reason I can think of is that making it a classmethod 
would have required the use of super(Parent, cls) to call the parent's 
class __new__, which may (or may not - never had the case) be 
problematic (any guru on this ?)

>> IOW, I'm talking about semantic, not implementation.
> 
> I understand what you mean, and from that point of view you can argue
> against my example above 

It's somehow difficult to argue against something that's just the plain 
and naked truth. My one and only argument is about __new__ being 
semantically close enough to a classmethod to wonder why it isn't one.

> (after all, my example is code, not pure
> concept) but for me it is simpler to think of __new__ as a
> staticmethod (which it is!), plain and simple.

I could by no mean hold it against you !-)


From jschroed at gmail.com  Thu May  8 12:53:36 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 09:53:36 -0700
Subject: Troubles with 'self'
In-Reply-To: <467304.16209.qm@web81401.mail.mud.yahoo.com>
References: <467304.16209.qm@web81401.mail.mud.yahoo.com>
Message-ID: <4878ad7b0805080953l30aec474s65ee9e6dfeed93a@mail.gmail.com>

I think you need to make an instance of your class.  Try this:

my_class_instance = DataAnalysis()
LogFile = my_class_instance.BasicSummary ( )

On Thu, May 8, 2008 at 7:07 AM, Richard Speaker <
richard.speaker at sbcglobal.net> wrote:

> I'm somewhat new to Python... and programming in general.  I know enough to
> be dangerous for sure. I have a feeling the solution to this is simple.  I'm
> having trouble getting 'self' to initialize or work in a class application.
> I keep getting the message:
>
>     LogFile = self.BasicSummary ( )
> NameError: name 'self' is not defined
>
> Code looks like this:
>
> from data_decode import *
> class DataAnalysis:
>
>         def PainInTheArse ( self , i , InvI ):
>                 """This is a filter I made to overcome
>                 some problems I was having with sine wave
>                 analysis"""
>                 TemporaryData = [ ]
>                 for a in range ( int ( InvI [ i ] ) , len ( InvI ) ):
>                         if a < 0:
>                                 a = 0
>                         b = a + 1
>                         try:
>                                 TemporaryData.append ( InvI [ a + i ] )
>                                 if ( InvI [ b + i ] < 0 and InvI [ b + i +
> 1 ] > 0 ):
>                                         TemporaryData.append ( InvI [ a + i
> + 1 ] )
>                                         break
>                         except IndexError:
>                                 continue
>                 return TemporaryData
>         def GetTheInvIData ( self , InvI ):
>                 """"Function determines zero-crossing, and then
>                 calculates the +/- peaks to get an average """
>                 CurrentMaxList = [ ]
>                 CurrentMinList = [ ]
>                 for i in range ( 0 , len ( InvI ) ):
>                         try:
>                                 if ( InvI [ i ] <= 0 and InvI [ i + 1 ] > 0
> ):
>                                         TemporaryData = self. PainInTheArse
> ( i , InvI )
>                                         BetterData = self.FilterTheBS (
> TemporaryData )
>                                         CurrentMaxList.append ( max (
> BetterData ) )
>                                         CurrentMinList.append ( min (
> BetterData ) )
>                         except IndexError:
>                                 continue
>                 MeanCurrentMax = sum ( CurrentMaxList ) / len (
> CurrentMaxList )
>                 MeanCurrentMin = sum ( CurrentMinList ) / len (
> CurrentMinList )
>                 InvIPeakToPeak = MeanCurrentMax - MeanCurrentMin
>                 EstPeak = InvIPeakToPeak / 2
>                 return EstPeak
>
>         def FilterTheBS ( self , TemporaryData ):
>                 """This is another filter I made to overcome
>                 some problems I was having with sine wave
>                 analysis"""
>                 BetterData = [ ]
>                 UselessData = [ ]
>                 for i in range ( 0 , len ( TemporaryData ) ):
>                         try:
>                                 if TemporaryData [ i ] == TemporaryData [ i
> + 1 ]:
>                                         UselessData.append ( TemporaryData
> [ i ] )
>                                 else:
>                                         BetterData.append ( TemporaryData [
> i ] )
>                         except IndexError:
>                                 BetterData.append ( TemporaryData [ i ] )
>                                 continue
>                 return BetterData
>         def BasicSummary ( self ):
>
>                 DDC = DecodeData( )
>                 try:
>                         MeanCurrent_A = float ( ( self.GetTheInvIData (
> DDC.InvIa ) ) )
>                         MeanCurrent_B = float ( ( self.GetTheInvIData (
> DDC.InvIb ) ) )
>                         MeanCurrent_C = float ( ( self.GetTheInvIData (
> DDC.InvIc ) ) )
>   except ValueError:
>    print'KaFlewie!'
>                 LogFile = []
>                 LogFile.append ('DEVICE CURRENT SUMMARY:\n')
>                 LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % (
> MeanCurrent_A ) )
>                 LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % (
> MeanCurrent_B ) )
>
>                 return LogFile
>
>         LogFile = self.BasicSummary ( )
>         for a in LogFile:
>   print a
>
>
> any and all advice is welcome
>
> Rick
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From cwitts at gmail.com  Wed May 28 07:16:57 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 04:16:57 -0700 (PDT)
Subject: A quick question
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <fa237962-e58a-4615-ac6f-9974f9c39352@m36g2000hse.googlegroups.com>

On May 28, 12:25?pm, "James" <cobro... at msn.com> wrote:
> Hey everyone,
>
> I just started using python and cant figure this out, I'm trying to
> make a program where someone types in a word and the program gives it
> back backwards. ?For example if the person puts in "cat" I want the
> program to give it back as "tac" and what it does is prints out 3,2,1. ?
> How can I get these integers to print as letters? ?This is what I have,
>
> word = raw_input("Type a word:")
> start = len(word)
>
> for letter in range(start, 0, -1):
> ? ? print letter ?

word = raw_input("Type a word:")
print 'Reversed : %s' % word[::-1]


From jschroed at gmail.com  Thu May  8 12:48:15 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 09:48:15 -0700
Subject: Given a string - execute a function by the same name
In-Reply-To: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.291.1209400412.12834.python-list@python.org>
	<jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <4878ad7b0805080948q36b97c05j713de0e6c010ad84@mail.gmail.com>

You can do it with a class using the __getattr__ function.  There might be a
way to do it without a class but I don't how to do it that way.

class AllMyFunctions(object):
    def a(self):
        print "Hello.  I am a."

    def b(self):
        print "Hey.  I'm b."

x = raw_input("Enter a function to call: ")
if x not in AllMyFunctions().__dict__:
    print "That's not a function that I have."
else:
    getattr(AllMyFunctions(), x)()

On Thu, May 8, 2008 at 9:33 AM, Andrew Koenig <ark at acm.org> wrote:

> <python at bdurham.com> wrote in message
> news:mailman.291.1209400412.12834.python-list at python.org...
>
> > I'm parsing a simple file and given a line's keyword, would like to call
> > the equivalently named function.
>
> No, actually, you woudn't :-)  Doing so means that if your programs input
> specification ever changes, you have to rename all of the relevant
> functions.  Moreover, it leaves open the possibility that you might wind up
> calling a function you didn't intend.
>
> The right way to solve this kind of problem is to list all the functions
> you
> wish to be able to call in this way, and then explicitly define a mapping
> from keywords to the appropriate functions.  Which is exactly what you're
> doing in
>
> > 3. Place all my functions in dictionary and lookup the function to be
> > called
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From castironpi at gmail.com  Tue May 20 10:07:57 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 07:07:57 -0700 (PDT)
Subject: persistent deque
Message-ID: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>

I'd like a persistent deque, such that the instance operations all
commit atomicly to file system.


From tjreedy at udel.edu  Tue May 20 14:09:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 14:09:31 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com><mailman.1361.1211228890.12834.python-list@python.org><4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com><8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com><3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com><20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <g0v44p$loj$1@ger.gmane.org>


"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9AA470833CCA8duncanbooth at 127.0.0.1...
| In short, two equal strings may or may not be identical and any code 
which
| makes assumptions based on observed behaviour is broken. If you want to 
be
| able to test identity on strings safely then use the 'intern()' builtin 
to
| get repeatable behaviour.

Intern() is gone in 3.0 





From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:07:40 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:07:40 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4831516b$0$24599$426a74cc@news.free.fr>

John Salerno a ?crit :
> Hey all. Just thought I'd ask a general question for my own interest.
> Every time I think of something I might do in Python, it usually
> involves creating a GUI interface, so I was wondering what kind of
> work you all do with Python that does *not* involve any GUI work.
> This could be any little scripts you write for your own benefit, or
> what you do at work, if you feel like talking about that! :)

web apps, command line utilities, and of course libraries.



From arnodel at googlemail.com  Mon May 26 04:06:46 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 09:06:46 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
Message-ID: <m2hccl5w15.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> pball.benetech at gmail.com writes:
>
>> On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
>>> > We can use any operation or function which
>>> > takes and returns sets.
>>>
>>> I think the problem is significantly underspecified. It would be a more
>>> interesting problem if there was a restriction to a few selected set
>>> operations, e.g. union, intersection, difference, and combinations
>>> thereof.
>>
>> Ok, that's quite right -- when I just tried to define "any function,"
>> I found that all the solutions I came up with were combinations of the
>> set operations defined for immutable sets. Let me improve the spec as
>> the following:
>>
>> There may be arbitrarily many set elements (denoted by integers
>> 1,2,3,...), arbitrarily many combinations of the elements composing
>> the sets s_i (s0, s1, ...). We can use any of python's set operations
>> or combination of those operations.
>
> OK then, if you only allow union, intersection, difference, symmetric
> difference then I think it would be easy to prove (I haven't done it!)
> that if there is a solution to you problem, then the method below
> yields a solution:
>
> *** warning: all this is untested AND written in a rush ***
>
> let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
>
>
> # X is the "domain", C is the set of complements in X of elements of S
>
> X = reduce(set.union, S)
> C = set(X - s for s in S)
>
>
> # Find the "fibers" at each element x of s0.  A fiber at x is the set
> # of all s in S or C that contain x
>
> from collections import defaultdict
> fibers = defaultdict(list)
>
> for s in S | C:
>     for x in s & s0:
>         fibers[x].append(s)
>
>
> # Find the "seeds" at each x in s0.  A seed at x is the set of all
> # elements contained in all s in the fiber at x.
>
> # Intutively, a seed at x is the smallest set containing x that can be
> # built from S
>
> seeds = [reduce(set.intersection, F) for F in fibers.itervalues()]
>
>
> # Now we know if there is a solution:
>
> sol = reduce(set.union, seeds)
>
> if sol != s0:
>     print "No solution"
> else:
>     print "Solution: union(intersection(fibers[x]) for x in s0)"
>
>
> I think this solution will be found in O(m*n**2) time, where:
>
> * n is the size of X (i.e. the total number of elements)
> * m is the size of S (i.e. the total number of sets)
>
> and assuming that set operations are linear.

I forgot to add, using reduce() is probably not a great idea but it
allowed me to write down my idea quickly!

-- 
Arnaud


From castironpi at gmail.com  Sun May 11 04:09:21 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 01:09:21 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<7xabix2yds.fsf@ruckus.brouhaha.com>
Message-ID: <76cd3ea7-58e1-4167-a8b4-8108dc6e7bc1@z72g2000hsb.googlegroups.com>

On May 11, 12:38?am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> John Salerno <johnj... at NOSPAMgmail.com> writes:
> > for x in range(10):
> > ? ? #do something 10 times
>
> > is unPythonic. The reason I ask is because the structure of the for loop
> > seems to be for iterating through a sequence. It seems somewhat
> > artificial to use the for loop to do something a certain number of
> > times, like above.
>
> It is pretty natural in imperative-style code. ?The one thing I'd do
> differently is use xrange instead of range, to avoid creating a
> 10-element list in memory before starting the loop.

If you give extras to memory, can Python live?


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:44:34 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:44:34 -0300
Subject: python equivalent to perl's inplace edit mechanism
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <op.uat5okt3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:11:56 -0300, Michael Mabin <d3vvnull at gmail.com> escribi?:

> Does python have an equivalent to Perl's inplace-edit variable $^I?
> For example, the following perl code below changes mike to dave in a file
> that is passed as an argument.
>
> #!/usr/bin/env perl
> #chgit script
> $^I = '';
> while(<>) {
>   s/mike/dave/g;
>   print;
> }
>
> The script would be used as below:
> chgit somefile
>
> Afterward, all instances of mike are changed to dave.

Like this?

<code>
import sys,fileinput

for line in fileinput.input(inplace=True):
     sys.stdout.write(line.replace('mike','dave'))
</code>

Sample session:

C:\TEMP>type foo.txt
this line tells about mike and john
this second line says nothing
goodbye mike!

C:\TEMP>python chgit.py foo.txt

C:\TEMP>type foo.txt
this line tells about dave and john
this second line says nothing
goodbye dave!

-- 
Gabriel Genellina



From Lie.1296 at gmail.com  Tue May 13 10:20:14 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 07:20:14 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au> 
	<482912b7$0$11641$607ed4bc@cv.net>
Message-ID: <f9e593e2-7b11-4e8f-a604-fbc386cef448@l17g2000pri.googlegroups.com>

On May 13, 11:01?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Ben Finney wrote:
> > I think that the idiom
>
> > ? ? for unused in xrange(10):
> > ? ? ? ? # do stuff with no reference to 'unused'
>
> > is quite common. Is that what you're asking about?
>
> Yes. I was more or less asking about the specific situation of using a
> for loop to do something X number of times, but I think the more
> generalized problem that everyone is talking about -- using a counter
> variable that is never referenced in the loop -- probably puts the point
> I was trying to make in a better light.
>
> The reason I even brought this up is because I remember someone saying a
> while back (probably here on the newsgroup) that the true use of a for
> loop was to iterate through a sequence (for the purpose of using that
> sequence), not to do something X number of times. Once they made this
> comment, I suddenly saw the for loop in a new (and I believe purer)
> light. That was the first time I realized what it was really meant
> to do.
>
> Using something like:
>
> for unused in xrange(10):
> ? ? # do stuff 10 times
>
> suddenly seemed to me like a hackish way to replace
>
> for (int i=0; i<10; i++) {
> ? ? // do stuff 10 times;
>
> }
>
> Not that I think the above code (C#) looks all that elegant either. But
> in C# there is a distinction between the above, and this:
>
> foreach (int i in sequence)
> ? ? // do something;
>
> which is more closely related to the Python for loop.
>
> Now, you could easily make the argument that the Python for loop is a
> much simpler tool to accomplish *both* of the above, and I suppose that
> makes sense. Seems a little silly to have two separate for loops to do
> these things. I just wasn't sure if the "counter" version of the Python
> for loop was considered slightly unpythonic.

What was unPythonic, I think, as most people would agree, is to use
for like this:

 --
    for i in xrange(len(lst)):
        pass
 --

In VB, my language before Python, I've never used For Each even for a
sequence (Array, in VB), it seems too messy back then. Now, with
Python that only allowed a foreach statement, I realized that I never
really needed a for i in range(10) at all. Most of the time the places
where I need to do that is where the code is just a test code that
loops a certain number of times (with randomized input data), almost
never (probably never) met that in a real program code. And even in
some of those cases, the variables are usually used too (as a test
argument to the function being tested) or for logging purpose.

On May 13, 8:25 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
(snip)
> I use it quite often, especially if I want to implement a fixed number of
> retries on a communications channel.
>
> -Larry

That still have semantic meaning: 'tries'. If it was me, I'll go to
the trouble of giving names, since I would use it for logging or
informational purpose ('first try' 'second try' 'third try' 'no more
try').

I've never really met a real "do something n times" case, where the
variable doesn't hold any semantic meaning that I don't want to use
and is not a test case.

For me, a _ (or any other dummy variable[1]) is good enough and it's
easy to change if later I realized that I actually need to use the
variable. I agree though, that i, j, k for unused name is a bad choice
because single letter names is in common usage in mathematics.

[1] PEP 8 is useless if a certain code base has other agreed
convention, as long as the name used for a unused name in certain code
base is consistent (and probably documented), it never becomes a
problem.


From daveparker at flamingthunder.com  Wed May 21 12:11:13 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 09:11:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
Message-ID: <7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>

On May 21, 10:00?am, "Dan Upton" <up... at virginia.edu> wrote:

> Sounds to me like the teacher is being difficult, ...

No, proof-by-contradiction is a common technique in math.  If you can
show that x=8 and x=10, then you have shown that your assumptions were
incorrect.

> If you can't do, or don't like, math, you probably shouldn't be
> programming.

Why not?  Recipes are programs.  I prefer to look at it the other way:
an easy-to-use programming language might encourage more people to
like math.

> You keep trotting out this quadratic equation example, but does FT
> actually have any kind of useful equation solver in it?

Not yet, but it will.  Probably around July.


From inhahe at gmail.com  Fri May 16 12:59:01 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:59:01 -0400
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
Message-ID: <O1jXj.4901$Kk3.1265@bignews9.bellsouth.net>

I'm not sure it's possible to kill a thread in Python that's in the middle
of a C function.  I know you can't do it with signals, for example.  Or can
you?  I'm on Windows and signals isn't fully implemented.

I had to do just this, btw, so I wrote another Python program that
communicates with the main one over a socket and then if it misbehaves I can
kill it using an OS command because it's a process and there's an OS command
for killing processes, and then I'd restart it.  The problem is that,
sometimes the OS kill command would work, sometimes it wouldn't, and I never
did figure what makes the difference.



"Roger Heathcote" <usenet at technicalbloke.com> wrote in message
news:DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d at bt.com...
> Hello everyone, this is my first post so hello & please be gentle!
>
> Despite many peoples insistence that allowing for the arbitrary killing of
> threads is a cardinal sin and although I have no particular threading
> problem to crack right now I remain interest in the taboo that is thread
> killing. The real world and it's data are messy and imperfect and I can
> think of several scenarios where it could be useful to be able to bump off
> a naughty thread, especially when using/testing unstable 3rd party modules
> and other code that is an unknown quantity.
>
> With this in mind I am experimenting with a set of threading subclasses
> that would permit timeouts and the manual killing of threads. I'm trying
> to evaluate how robust such a scheme can be made and what the limitations
> would be in practice.
>
> So far I can seemingly murder/timeout pure python threads that are stuck
> blocking for input and stuck in infinite loops but I'm guessing there are
> many more awkward cases. What I'm looking for are examples of code/modules
> that can get stuck in dead ends or might otherwise be problematic to
> terminate.
>
> In particular I'd be interested to see if I could kill a non-returning c
> module. Of course naturally no one wants to be publishing buggy modules
> and the like so I am having trouble finding examples of misbehaving c code
> to explore further. I figure I could learn how to write c modules for
> python but, while it's something I'd like to know someday, I'm guessing
> that will be too long to fit into the immediate future :/ Consequently if
> anyone has detailed knowledge of what is and isn't fundamentally possible
> in the world of thread culling, or if you can point me to some
> gnarly/non-returning thread code to test with I would be forever grateful.
>
> Oh yes, I'm working primarily with 2.5 on XP however I have access to
> linux & OSX boxen and I'd be interested to learn about problematic thread
> code for either of those platforms as well.
>
> Thanks for reading,
>
> Roger Heathcote - www.technicalbloke.com





From mccredie at gmail.com  Wed May 28 21:08:35 2008
From: mccredie at gmail.com (Matimus)
Date: Wed, 28 May 2008 18:08:35 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <d5f3147d-ce9c-4dc9-a36c-508f22f85254@l64g2000hse.googlegroups.com>

> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486


I frequently use strings in place of enumeration in python. I have
found it to be very useful. I'm curious about the _many negatives_ you
have found?

For example, I wrote a module and one of the parameters to a function
was `mode`. Two of the modes were ALL_MODE and ONE_MODE.

At first I enumerated the modes:

MODES = ALL_MODE, ONE_MODE = 0, 1

And code using the mode tended to look something like this:

from package import module
module.foo(mode=module.ALL_MODE)

Of course, the following would also work, but isn't self descriptive:

module.foo(mode=0)

Then, after some user feedback I changed it to this:

MODES = ALL_MODE, ONE_MODE = "all one".split()

This maintained backwards compatabilty, but users could use the much
more concise (but still readable) version:

module.foo(mode="all")

Since then, I have adopted using strings in place of enum types as a
best practice.

Matt


From bj_666 at gmx.net  Sat May  3 02:16:13 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 3 May 2008 06:16:13 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de> <m21w4kbm4l.fsf@googlemail.com>
Message-ID: <682e9cF2qodffU1@mid.uni-berlin.de>

On Fri, 02 May 2008 19:23:54 +0100, Arnaud Delobelle wrote:

> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
> 
>>
>> There are no modern processors with an opcode for incrementing a memory
>> location!?  At least my C64 can do that.  ;-)
> 
> Indeed!  I remember a simple use was to make the border change colour
> very fast, a v. cool effect when you're 12!
>  
>         CLV
> LOOP:   INC $D020
>         BVC LOOP
> 
> (from memory, untested!)

That works but I think

LOOP:	INC $D020
	JMP LOOP

is a bit more straight forward.  Shorter in opcodes, equal in bytes, the
loop is as fast but you save the two cycles of the CLV.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From paddy3118 at googlemail.com  Wed May 21 01:39:30 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 22:39:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <451986c6-ba24-4060-917b-97fedcba13d7@x35g2000hsb.googlegroups.com>

On May 17, 11:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.

Using Python doesn't mean you give up on C! Many of the best
algorithms written in other languages such as C, C++ and Fortran are
pre-wrapped in Python or can be wrapped in a Python interface to
enhance usability, without having to pay Matlab-type prices. You then
make your resulting work easier to reproduce by lowering the cost to
other researchers.

Python is a scripting language. Despite what some may think, it is a
boon, as it means that Pythons designers value its ability to work
well with other languages and systems.

Nothing stops you from exploring algorithm space in Python then re-
implementing in a language closer to assembler - and this may well be
the quicker way to your goal.

- Paddy.





From gandalf at shopzeus.com  Fri May 16 07:33:04 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 13:33:04 +0200
Subject: ply yacc lineno not working?
Message-ID: <482D70F0.9070202@shopzeus.com>

This is a fragment from my yacc file:


import ply.yacc as yacc
from lex import tokens
from ast import *

def p_msd(p):
    r"""msd : SCHEMA WORD LBRACE defs RBRACE """
    p[0] = MSDSchema(p[2])   
    print p.lineno(5) # Line number of the right brace
    p[0].items = p[4]


Here is a test input: """

schema TestSchema {
    field name : varchar { required; size 100; }
}

"""


My program prints out 1. No matter what I do, YaccProduction.lineno(n) 
returns 1 for every possible n between 0 and 5. What am I doing wrong? 
Can it be a problem if I use this in my lexer:

# Whitespace is mostly ignored, except inside quoted words.
def t_ws(t):
    r'[\n\r\t ]+'
    # We do not return anything so this will be ignored.


If so, how can I easily ignore newlines while preserving the line number 
for yacc.parse ?

Thanks,

   Laszlo



From deets at nospam.web.de  Thu May  1 11:18:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 May 2008 17:18:47 +0200
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <67u5aqF2qfrq9U1@mid.uni-berlin.de>

AlFire schrieb:
> Hi,
> 
> I have a piece of software which uses threads in very massive way - like 
> hundreds of  them generated every second.
> 
> there is also a piece of code which maintains the number of outstanding 
> threads, simply
> 
> counter+=1 is executed when before starting the thread and counter-=1 
> after it finishes.
> 
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
> 
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.
> 
> I guarded those statement with Lock.{acquire,release} and now it always 
> returns 0.
> 
> 
> But I still can not believe that +=1 is not a thread safe operation.

don't confuse augmented assignment with incrementation as it is offered 
by C (if your data-type actually fits into a single addressable memory 
spot, that is)

python's += works like this


a += b  <=> a = a.__iadd__(b)

Thus you actually get a situation where the expression on the right is 
evaluated but not yet assigned - and then another thread can take over 
control, computing  with the old value of a.

Diez


From george.sakkis at gmail.com  Tue May 27 15:16:41 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 27 May 2008 12:16:41 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net> 
	<6382bf6f-3478-4a88-8f43-3b38c20d3b85@l64g2000hse.googlegroups.com>
Message-ID: <3c7d20b4-50ee-4397-b3ba-3f22245b1420@x41g2000hsb.googlegroups.com>

On May 27, 3:43 am, Paddy <paddy3... at googlemail.com> wrote:
> On May 27, 7:42 am, "inhahe" <inh... at gmail.com> wrote:
>
> > Well, I just need it once in a while.  Actually now is the only time I
> > remember.  The last time what I needed was a file name extension.  I want a
> > string called headers, but I want to derive a dict from it, also called
> > headers.  So I figured the string would be called strHeaders, and the dict,
> > dctHeaders probably, but when a precedent for something like that exists, I
> > like to use it.
>
> > "Kam-Hung Soh" <kamhung.... at gmail.com> wrote in message
>
> I have a my own sometime used convention od using dict names that
> mirror
> what is being mapped to what, so a dict mapping headers to body might
> be called head2body, in general a mapping from x to y I might call
> x2y.

I use the same convention, though it's less than ideal if x or y
consist of more than one word (typically joined with underscore), e.g.
"value2row_id" or if the values are also dicts
("category2value2instances").

George


From nick at craig-wood.com  Fri May 23 16:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 15:30:09 -0500
Subject: array of 64-bit ints?
References: <g16tub$qoj$1@rumours.uwaterloo.ca> <483700FF.1020704@v.loewis.de>
Message-ID: <slrng3e7un.dgr.nick@irishsea.home.craig-wood.com>

Martin v. L?wis <martin at v.loewis.de> wrote:
> > Is it possible to have an array of 64-bit-ints using the standard Python 
> > array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
> > "long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
> > "long long int" or "size_t".  However, according to the Python array 
> > documentation, arrays of "size_t" or "long long int" are not available.
> 
>  No, it's not possible.

You could do it with ctypes like this...

from ctypes import *

Array = c_int64 * 100

a = Array()
for i in range(100):
    a[i] = 2**63 - i
    
for i in range(100):
    print a[i]

prints

-9223372036854775808
9223372036854775807
9223372036854775806
[snip]
9223372036854775710
9223372036854775709

ctypes arrays are fixed length once created though.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gherron at islandtraining.com  Fri May 16 17:40:51 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 16 May 2008 14:40:51 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
References: <mailman.1246.1210972944.12834.python-list@python.org>
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
Message-ID: <482DFF63.7020701@islandtraining.com>

bruno.desthuilliers at gmail.com wrote:
> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>   
>> Dan Upton wrote:
>>     
>>> for pid in procs_dict:
>>>   if procs_dict[pid].poll() != None
>>>    # do the counter updates
>>>    del procs_dict[pid]
>>>       
>>> The problem:
>>>       
>>> RuntimeError: dictionary changed size during iteration
>>>       
>> I don't know if the setup with the pids in a dictionary is the best way to
>> manage a pool of processes... I'll leave it others, presumably more
>> knowledgable, to comment on that. :-)  But I can tell you how to solve the
>> immediate problem:
>>
>>    for pid in procs_dict.keys():
>>     

No, keys() produces a list (which is what is wanted here). 

It's iterkeys() that produces an iterator which would reproduce the OP's 
problem.

And then, in Python3, keys() produces something else altogether (call a 
view of the dictionary) which would provoke the same problem, so yet 
another solution would have to be found then.

Gary Herron

>
> I'm afraid this will do the same exact thing. A for loop on a dict
> iterates over the dict keys, so both statements are strictly
> equivalent from a practical POV.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From notbob at nothome.com  Sat May 10 23:45:38 2008
From: notbob at nothome.com (notbob)
Date: Sun, 11 May 2008 03:45:38 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<HaCdnbrDHoZbyLvVnZ2dnUVZ_gSdnZ2d@earthlink.com>
Message-ID: <CZtVj.53584$kl6.8387@fe103.usenetserver.com>

On 2008-05-11, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> on the Amiga, it could be any of those applications).

ahhh.... the Amiga, the demise of which was one of the great calamaties of
our cyber time.  (sniff)

nb


From inhahe at gmail.com  Wed May 21 10:57:32 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 10:57:32 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <YJWYj.78109$%15.3302@bignews7.bellsouth.net>

one of the few things i miss from C is being able to use assignment in 
expressions.   that's the only thing, really.
also there's no switch/case, you have to use a dictionary of functions 
instead, although i rarely need that, usually i just use elif.

<boblatest at googlemail.com> wrote in message 
news:7df99fd4-21c9-49a1-ba65-e55794fd4c12 at 26g2000hsk.googlegroups.com...
> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
>> Although that solution is pretty, it is not the canonical solution
>> because it doesn't cover the important case of "if" bodies needing to
>> access common variables in the enclosing scope.  (This will be easier
>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> IMHO closer to a canonical solution to this FAQ.
>
> Hello everybody,
>
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.
>
> Thanks again,
> robert
>
> PS: Since I'm testing only three REs, and I only need the match
> results from one of them, I just re-evaluate that one. 




From hdante at gmail.com  Thu May 15 12:43:15 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Thu, 15 May 2008 16:43:15 +0000 (UTC)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
Message-ID: <g0hp73$erh$1@ger.gmane.org>

Em Thu, 15 May 2008 08:03:40 -0700, p.wallstedt escreveu:

> Hi all!
> 
> I have a small but rather annoying problem with pyserial. I want to open
> a file on disk for reading and then open a com-port, write lines from
> the file to the port and then read something back and compare it to the
> next line in the file. Should be simple. And it is, apart from the fact
> that the file seems to be doubled ...? Or it loops through the file
> twice.
> 
> If I exclude the "import serial" it works.
> 
> Any ideas?
> 
> thanks
> Peter

 Are you sure you need to reinvent the wheel ? For example, pppd has the 
"chat" application:

 http://www.hmug.org/man/8/chat.php



From krumblebunk at gmail.com  Tue May  6 08:27:26 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 05:27:26 -0700 (PDT)
Subject: Comparing strings - akin to Perl's "=~"
Message-ID: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>

Hello gurus,

I am learning Python to take the place of Perl in my toolbox of bits
and bobs, and writing something pretty simple in theory, but having a
hard time in Python with it - I am using a 3rd party module, and I am
sure the etiquette of this channel states that this is pure Python
questions only, but please bare with me in light of this, as my
question does indeed relate to Python only.

I am grabbing the output from a SQL statement (using PyGreSQL 'pg'
module), and when it returns the result, I am pulling it out as such:

try:
    sc=pg.connect(dbname='mydb',host='dbhost',user='ppp')
except pg.InternalError:
    print "Failed to execute SQL: %s" % sql
    exit

for foo in sc.query(sql).dictresult():   <- this returns a dict of the
result
    f=dict(foo)
    for k in f.iteritems()
        if k == '^Hostname':               <-- need this sort of
behaviour - match a partial string.
        print "%s" % f[3]              <-- ..and if true, need to pull
out the 4th column on that line.

This breaks spectacularly -

any ideas?

thanks!

kb.



From carsten.haese at gmail.com  Tue May 13 21:49:14 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Tue, 13 May 2008 21:49:14 -0400
Subject: 2004 example, passing function error
In-Reply-To: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
References: <3a70d3c9-41b9-4dfa-9127-ed6d1a8abda5@s50g2000hsb.googlegroups.com>
Message-ID: <uyrWj.1339$l97.374@flpi144.ffdc.sbc.com>

globalrev wrote:
>  but it looks like he just copied his
> shell...has there been a change since 2004 inr egards to how you can
> pass functions as arguments to functions??

It looks like it's copy/pasted from a shell, but it's not. No past or 
present Python interpreter could produce an interactive session like 
that under any circumstances. My guess is that instead of copy/pasting, 
the author simply retyped the session and made a mistake in doing so.

--
Carsten Haese
http://informixdb.sourceforge.net


From roy at panix.com  Sat May 24 10:57:29 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 10:57:29 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <roy-0E13C2.10572924052008@70-1-84-166.area1.spcsdns.net>

In article 
<a2c4d209-e203-4b43-aa57-f9f0248b2409 at a70g2000hsh.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> Whilst I understand your point, I think the danger is that you end up
> with hidden dependencies on the test order - which you're not aware of
> and that the tests never expose.

Well, yes.  But, this is no worse than the current situation, where the 
tests are run in alphabetical order by default.  You could still have 
hidden dependencies and not realize it.


From casey.mcginty at gmail.com  Sun May 25 18:46:50 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 12:46:50 -1000
Subject: Organizing a Python project
In-Reply-To: <op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>

On Sat, May 24, 2008 at 2:11 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> > 2. In the top of your package directory it is typical to have a module
> name
> > '_package.py'. This is ideally where the main command line entry point
> for
> > the package code should be placed.
>
> Why the underscore? And I usually don't put executable scripts inside a
> package - I consider them just libraries, to be imported by other parts of
> the application.
> It's easier to test too when your tests *and* the application code are
> external to the package itself.
>

Ok, guess using the '_package' name is not very common. I saw it used by the
dbus module. My whole concern here is that using a script will fragment your
application code across the file system. I would prefer to have it all in a
single spot. So I still like they idea of keeping most of application code
(argument parsing, help output, initialization) inside of the package. The
'_' should indicate that any other modules using your package should import
that module.

- Casey
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From mathieu.prevot at ens.fr  Sat May 24 08:56:30 2008
From: mathieu.prevot at ens.fr (Mathieu Prevot)
Date: Sat, 24 May 2008 14:56:30 +0200
Subject: Popen: NameError: name 'PIPE' is not defined
In-Reply-To: <69qgseF31lv3aU1@mid.uni-berlin.de>
References: <mailman.1522.1211630957.12834.python-list@python.org>
	<69qgseF31lv3aU1@mid.uni-berlin.de>
Message-ID: <3e473cc60805240556t26019274x3e028ffe9196f46@mail.gmail.com>

2008/5/24 Diez B. Roggisch <deets at nospam.web.de>:
> Mathieu Prevot schrieb:
>>
>> Hi
>>
>> I import subprocess and use Popen, but PIPE is not defined. I used
>> 2.5.1, 2.5.2, Python 2.6a3+ (trunk:63576, May 24 2008, 12:13:40), it's
>> always the same. What am I missing ?
>
> Without showing code, it's hard to know. A guess is: if you use
>
> import subprocess
>
>
> then use
>
>
> subprocess.PIPE
>
> Or if using
>
> from subprocess import Popen
>
> make sure to do
>
> from subprocess import Popen, PIPE
>
> Diez

Indeed... thank you !

Mathieu


From mcknight0219 at gmail.com  Mon May 12 22:19:05 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Mon, 12 May 2008 19:19:05 -0700 (PDT)
Subject: how to get information of a running prog in python
Message-ID: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>

Well, i know it may be a little non-python thing, however, I can think
of no place better to post this question :)

can anyone tell me, in python, how to obtain some information of a
running program?
paticularly, if i am playing some music in audacious or other media
player, how can i get the the name and some other info of current
playing song? It seems that audicious doesn't output on run-time


From joe.p.cool at googlemail.com  Sun May 11 17:10:39 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Sun, 11 May 2008 14:10:39 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
	<68ifekF2sqbg2U1@mid.uni-berlin.de>
Message-ID: <be07e10a-36bd-4aa3-8df1-5b4e529802e9@s50g2000hsb.googlegroups.com>

On 9 Mai, 10:14, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> If you can work with the license (GPL), I suggest Qt4

Thanks for your helpful hints, guys.

--
Joe P. Cool


From pDOTpagel at helmholtz-muenchen.de  Sat May 31 11:15:12 2008
From: pDOTpagel at helmholtz-muenchen.de (Philipp Pagel)
Date: Sat, 31 May 2008 15:15:12 +0000 (UTC)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
	<g1p50c$97h$1@news.lrz-muenchen.de>
	<45f694b7-8c2c-4548-b6e8-42a12e96e0d4@d77g2000hsb.googlegroups.com>
Message-ID: <g1rq20$tmb$1@news.lrz-muenchen.de>

Mensanator <mensanator at aol.com> wrote:
> On May 30, 10:03???am, Philipp Pagel <pDOTpa... at helmholtz-muenchen.de>
> wrote:
> > 'P' is obviously not an ASCII representation of a number.

> It is in base 36.

Sure, but if that was the OP's intent he would most likely have
mentioned it...

As others have already guessed, it's most likely somethink like ord() he
was after.

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f. Genomorientierte Bioinformatik
Technische Universit?t M?nchen
http://mips.gsf.de/staff/pagel


From ptmcg at austin.rr.com  Tue May 20 10:58:00 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 07:58:00 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>

On May 20, 8:13?am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> I posted this code last night in response to another thread, and after I
> posted it I got to wondering if I had misused the list comprehension. Here's
> the two examples:
>
> Example 1:
> --------------------
> def compress(s):
> ? ? new = []
>
> ? ? for c in s:
> ? ? ? ? if c not in new:
> ? ? ? ? ? ? new.append(c)
> ? ? return ''.join(new)
> ----------------------
>
> Example 2:
> ------------------------
> def compress(s):
> ? ? new = []
> ? ? [new.append(c) for c in s if c not in new]
> ? ? return ''.join(new)
> --------------------------
>
> In example 1, the intention to make an in-place change is explicit, and it's
> being used as everyone expects it to be used. In example 2, however, I began
> to think this might be an abuse of list comprehensions, because I'm not
> assigning the result to anything (nor am I even using the result in any
> way).
>
> What does everyone think about this? Should list comprehensions be used this
> way, or should they only be used to actually create a new list that will
> then be assigned to a variable/returned/etc.?

Why not make the list comp the actual list you are trying to build?

def compress(s):
    seen = set()
    new = [c for c in s if c not in seen and (seen.add(c) or True)]
    return ''.join(new)

or just:

def compress(s):
    seen = set()
    return ''.join(c for c in s if c not in seen and (seen.add(c) or
True))

Using the set also gets rid of that nasty quadratic performance
thingy.

-- Paul


From kay.schluehr at gmx.net  Fri May 23 01:00:17 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 22 May 2008 22:00:17 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
Message-ID: <b959fa66-51d4-4704-8a60-76ec7da871f2@m3g2000hsc.googlegroups.com>

On 23 Mai, 00:51, Larry Bates <larry.ba... at websafe.com`> wrote:

> > I've yet to see a web application written in Python which is really
> > fast.
>
> You are just dead wrong about this.

No, he can demand whatever he wants and we can be stupid enough to
respond.


From spamgrinder.trylater at ggmail.com  Sun May  4 00:18:47 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Sat, 03 May 2008 23:18:47 -0500
Subject: is +=1 thread safe
In-Reply-To: <yfswsmbf0gm.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
Message-ID: <481D3927.4050509@ggmail.com>

Alexander Schmolck wrote:
> AlFire <spamgrinder.trylater at ggmail.com> writes:
> 
>>> The threading module already has a function to return the number of Thread
>>> objects currently alive.
>> I have threads within threads - so it does not suit me :-(.
> 
> How about using a scalar numpy array? They are mutable, so I assume that x +=
> 1 should be atomic.
> 
I ended up with following:

	counter=[]			counter=0

	counter.append(None)		counter+=1

	counter.pop()			counter-=1

	len(counter)			counter

A.


From meesters at uni-mainz.de  Fri May 30 09:05:47 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Fri, 30 May 2008 15:05:47 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
Message-ID: <g1ou3b$nqe$1@news1.zdv.uni-mainz.de>

Ok now, I know where the error is: "y" actually contained refcounts. This,
of course, is complete nonsense and causes the interpreter to crash at some
point.

Thanks to all of you: You helped at least to track down the problem.

Christian


From mnikhil at gmail.com  Wed May 14 14:25:51 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 23:55:51 +0530
Subject: readlines with line number support?
Message-ID: <g0farj$70d$1@registered.motzarella.org>

Hi,

I am reading a file with readlines method of the filepointer object 
returned by the open function. Along with reading the lines, I also need 
to know which line number of the file is read in the loop everytime.
I am sure, the line should have the property/attribute which will say 
the line number of the file.

If there is none, do I have to end up using the counter in the loop?

fp = open("file", "r")
lineno = 0
for line in fp.readlines():
	print "line number: " + lineno + ": " + line.rstrip()
         lineno = lineno + 1

--

Thanks,
Nikhil


From roy at panix.com  Wed May 21 15:13:18 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 15:13:18 -0400
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
Message-ID: <roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>

In article 
<90ecca29-c4d8-4e89-908a-93850d7de1bf at i76g2000hsf.googlegroups.com>,
 bukzor <workitharder at gmail.com> wrote:

> Does anyone have a pythonic way to check if a process is dead, given
> the pid?
> 
> This is the function I'm using is quite OS dependent. A good candidate
> might be "try: kill(pid)", since it throws an exception if the pid is
> dead, but that sends a signal which might interfere with the process.
> 
> Thanks.
> --Buck

The canonical way is to do kill(pid, 0).  If it doesn't throw, the process 
exists.  No actual signal is sent to the process either way.

Of course, the process could exit immediately after the kill() call, so by 
the time you find out it's alive, it's dead.  Such is life.


From inhahe at gmail.com  Fri May 16 10:27:45 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:27:45 -0400
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <_PgXj.4838$Kk3.4214@bignews9.bellsouth.net>

>>> a = 1
>>> b = eval("a")
>>> b
1
>>> a =1
>>> b = globals()["a"]
>>> b
1
>>> a =1
>>> b = locals()["a"]
>>> b
1
<rocco.rossi at gmail.com> wrote in message 
news:aec6cdd8-3bde-4d68-ad93-d9ece9567886 at b1g2000hsg.googlegroups.com...
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
>
> foo = some_function("foo")
>
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
>
> Thank you. 




From kyosohma at gmail.com  Wed May  7 08:57:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 05:57:43 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org>
Message-ID: <f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com>

On May 7, 4:45?am, Tim Golden <m... at timgolden.me.uk> wrote:
> In a spirit of being helpful... :)
>
> The code below (which I imagine every Windows programmer writes
> sometime in their Python life) mimics the os.walk functionality, yielding
> the key, subkeys, and values under a particular starting point in the
> registry. The "if __name__ == '__main__'" test run at the bottom does
> more-or-less what you were asking for originally, I think, converting
> some name to some other name wherever it appears.
>
> <module regwalk.py>
> import _winreg
>
> HIVES = {
> ? "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
> ? "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
> ? "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
> ? "HKEY_USERS" : _winreg.HKEY_USERS,
> ? "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
>
> }
>
> class RegKey:
>
> ? def __init__ (self, name, key):
> ? ? ?self.name = name
> ? ? ?self.key = key
>
> ? def __str__ (self):
> ? ? return self.name
>
> def walk (top):
> ? """walk the registry starting from the key represented by
> ? top in the form HIVE\\key\\subkey\\..\\subkey and generating
> ? key, subkey_names, values at each level.
>
> ? key is a lightly wrapped registry key, including the name
> ? and the HKEY object.
> ? subkey_names are simply names of the subkeys of that key
> ? values are 3-tuples containing (name, data, data-type).
> ? See the documentation for _winreg.EnumValue for more details.
> ? """
> ? if "\\" not in top: top += "\\"
> ? root, subkey = top.split ("\\", 1)
> ? key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ | _winreg.KEY_SET_VALUE)
>
> ? subkeys = []
> ? i = 0
> ? while True:
> ? ? try:
> ? ? ? subkeys.append (_winreg.EnumKey (key, i))
> ? ? ? i += 1
> ? ? except EnvironmentError:
> ? ? ? break
>
> ? values = []
> ? i = 0
> ? while True:
> ? ? try:
> ? ? ? values.append (_winreg.EnumValue (key, i))
> ? ? ? i += 1
> ? ? except EnvironmentError:
> ? ? ? break
>
> ? yield RegKey (top, key), subkeys, values
>
> ? for subkey in subkeys:
> ? ? for result in walk (top + "\\" + subkey):
> ? ? ? yield result
>
> if __name__ == '__main__':
> ? for key, subkey_names, values in walk ("HKEY_LOCAL_MACHINE\\Software\\Python"):
> ? ? print key
> ? ? for (name, data, type) in values:
> ? ? ? print " ?", name, "=>", data
> ? ? ? if type == _winreg.REG_SZ and "TJG" in data:
> ? ? ? ? _winreg.SetValueEx (key.key, name, 0, type, data.replace ("TJG", "XYZ"))
>
> </module regwalk.py>
>
> TJG

This is pretty cool stuff, Tim. Of course, it would also seriously
screw up some programs if you decided to replace the wrong phrase.
Just a word of warning to the OP: be sure to make a backup of the
registry before doing something like this. Trying to fix a messed up
registry from the command line is not a fun way to spend the
afternoon.

Mike


From hdante at gmail.com  Mon May 26 21:14:23 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 26 May 2008 18:14:23 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
	<8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>
	<d7f00113-f881-480f-9051-b688b1e60c84@m36g2000hse.googlegroups.com>
Message-ID: <eab0c6c0-7582-4da1-8119-2cb50fcd65cf@34g2000hsh.googlegroups.com>

On May 26, 6:54?pm, Peter <p.wallst... at gmail.com> wrote:
> On 23 Maj, 16:13, Grant Edwards <gra... at visi.com> wrote:
>
>
>
> > On 2008-05-23, Peter <p.wallst... at gmail.com> wrote:
>
> > > On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> > >> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> > >> > I have a small but rather annoying problem withpyserial. I want to
> > >> > open a file on disk for reading and then open a com-port, write lines
> > >> > from the file to the port and then read something back and compare it
> > >> > to the next line in the file. Should be simple. And it is, apart from
> > >> > the fact that the file seems to be doubled ...? Or it loops through
> > >> > the file twice.
>
> > >> > If I exclude the "import serial" it works.
>
> > >> > Any ideas?
>
> > >> Your problem is in line 117 of your program.
>
> > > Do you have to much time?
>
> > "Do you have a sense of irony?" he asked, already knowing the answer.
>
> > --
> > Grant
>
> Grant - "Do you have a sence of appropriateness"? he asked, already
> knowing the answer. I had no idea this is a comedy club. I might argue
> that my reply was also some sort of humor, but you clearly didn't see
> it that way. Maybe you should try living according to the rules you
> make for others?
>
> Diez - Did you mean the section which covers Asperger's Syndrome?
>
> I'm just being a hacker here guys ... according to the guidelines.
>
> It's amazing how such a simple question gets derailed immediately.
> Without any light on the subject ? whatsoever.

 Try asking about your problem again. Think before writing. Read your
text after you write it. Tell what you are trying to do, how you are
trying to do and what's the buggy behaviour. Copy the relevant part of
your source code here.


From maric at aristote.info  Fri May 23 01:39:29 2008
From: maric at aristote.info (Maric Michaud)
Date: Fri, 23 May 2008 07:39:29 +0200
Subject: Decorator metaclass
In-Reply-To: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
Message-ID: <200805230739.29745.maric@aristote.info>

Le Friday 23 May 2008 04:28:22 thomas.karolski at googlemail.com, vous avez 
?crit?:
> Hi,
> I would like to create a Decorator metaclass, which automatically
> turns a class which inherits from the "Decorator" type into a
> decorator.
> A decorator in this case, is simply a class which has all of its
> decorator implementation inside a decorator() method. Every other
> attribute access is being proxied to decorator().getParent().
>
> ...
>
> -------------------------------------------------------
> Unfortunately this does not work. The newly defined __init__ method
> inside __new__, does a call to impl(*args, **dargs). However, since
> the HBar.__init__ calls the Decorator.__init__ method, but the
> HBar.__init__ method no longer resides inside HBar, but rather inside
> HBarImpl (which is no longer a subtype of Decorator), the compiler
> complains that Decorator.__init__ is not being called with a Decorator
> instance as its first argument (which is true).
> I tried changing the definition of impl inside __new__ to have
> Decorator as one of its bases, but then for some reason impl(*args,
> **dargs) asks for 4 arguments (just like __new__) and I have no clue
> as to why that happens.
>
> Any help on this?
>

The problem with kind of design is that you must break the rules of class 
inheritance, and it seems like a strange idea to implement decorators by 
inheritance.

Of course you could do all sort of magic with python, but what is your goal ?
In your example, should the implementation types inherit from each other ?
In that case, do you want to preserve the same semantic for __init__ as in 
standard python class (this could be a hard job) ?

This quick fix seems to work with your example, but add extra magic to 
automatically call the super __init__ of the parent implementation, this 
could be a bad idea, use with caution ! (I still think it's a bad design, 
using composition and proxy classes is much more simple and clear)

class DecoratorType(type):
        def __new__(cls, name, bases, dct):

                # create a new class which will store all of the 
implementation
                parent_impl_type = bases[0] is object and object \
                                                       or bases[0]._impl_type
                impl = type('%sImpl'%name,(parent_impl_type,),dict(dct))
                dectype = type.__new__(cls, name, bases, {'_impl_type' : 
impl })

                # update the old class to implement this implementation
                def __init__(self, *args, **dargs):
                        print args, dargs
                        new_impl = impl(*args, **dargs)
                        super(dectype._impl_type, new_impl).__init__(*args,
                                                                     **dargs)
                        object.__setattr__(self, '_impl', new_impl)
                def decorator(self):
                        return object.__getattribute__(self,'_impl')
                def __getattribute__(self, attr):
                        if attr=="decorator":
                                return 
object.__getattribute__(self,'decorator')
                        return getattr(object.__getattribute__(
                                            self, 'decorator')(), attr)
                dectype.__init__ = __init__
                dectype.decorator = decorator
                dectype.__getattribute__ = __getattribute__

                return dectype

class Decorator(object):

        __metaclass__ = DecoratorType

class HBar(Decorator):
        def __init__(self, number):
                print 'hb:', number
                self._number = number
        def inc(self):
                self._number += 1
        def p(self):
                print self._number

class HBar2(HBar) :
        def __init__(self, number):
                print 'hb2:', number
                self._hb2 = number
        def inc2(self):
                self._hb2 += 1
        def p2(self):
                print self._hb2


hbar = HBar(10)
for each in dir(hbar.decorator()):
        print each

hbar.decorator().p()
hbar.decorator().inc()
hbar.decorator().p()

hb2 = HBar2(5)
hb2.p()
hb2.p2()
hb2.inc()
hb2.p()
hb2.p2()
hb2.inc2()
hb2.p()
hb2.p2()



-- 
_____________

Maric Michaud
_____________


From jstucklex at attglobal.net  Sun May 25 20:12:32 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:12:32 -0400
Subject: php vs python
In-Reply-To: <g1clpb$1pu0$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
Message-ID: <V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>> Not at all.  I do it every day.
>>
>> And BTW - yes, I write Python, also.  But I find I can write better,
>> faster code in PHP.
> 
> I find I can write better code in Python. Maybe it's just a matter of 
> personal preference?
> 
>> Do you write PHP?
> I did. And I hated it very much. I hated it so much that even I had few 
> Python scripts that generated PHP for me when it was possible.
> 

So you really don't write PHP.  Enough said.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From steven.p.clark at gmail.com  Mon May 19 10:38:18 2008
From: steven.p.clark at gmail.com (Steven Clark)
Date: Mon, 19 May 2008 10:38:18 -0400
Subject: scope of optional arguments
In-Reply-To: <g0s2v3$fa6$01$1@news.t-online.com>
References: <g0s2v3$fa6$01$1@news.t-online.com>
Message-ID: <663744510805190738q9431258kb30c8d8f3656ee68@mail.gmail.com>

http://www.ferg.org/projects/python_gotchas.html#contents_item_6

On Mon, May 19, 2008 at 10:30 AM, cseja <p5secr2 at uni-jena.de> wrote:
> If I call
>
> print walk([1,2,3], [])
> print walk([5,6,7])
>
> I get
>
> [1, 2, 3]
> [4, 5, 6]
>
> but when I call
>
> print walk([1,2,3])
> print walk([5,6,7])
>
> I get
>
> [1, 2, 3]
> [1, 2, 3, 4, 5, 6]
>
> at stdout, where
>
> def walk(seq, result = []):
>  for item in seq:
>    result.append(item)
>  return result
>
> Does that mean that the scope of optional arguments is global if they aren't
> used and local if they are (or am I missing something here)?
>
> Regards,
> CS
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From dgetsman at amirehab.net  Wed May 21 11:59:57 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 08:59:57 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
Message-ID: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>

Okay so I'm writing a script in python right now as a dirty fix for a
problem we're having at work..  Unfortunately this is the first really
non-trivial script that I've had to work with in python and the book
that I have on it really kind of sucks.

I'm having an issue parsing lines of 'last' output that I have stored
in a /tmp file.  The first time it does a .readline() I get the full
line of output, which I'm then able to split() and work with the
individual fields of without any problem.  Unfortunately, the second
time that I do a .readline() on the file, I am only receiving the
first character of the first field.  Looking through the /tmp file
shows that it's not corrupted from the format that it should be in at
all...  Here's the relevant script:

----
    #parse
    Lastdump = open('/tmp/esd_tmp', 'r')

    #find out what the last day entry is in the wtmp
    cur_rec = Lastdump.readline()
    work = cur_rec.split()

    if debug == 1:
        print work
        print " is our split record line from /tmp/esd_tmp\n"

    startday = work[3]

    if debug == 1:
        print startday + " is the starting day\n"
        print days
        print " is our dictionary of days\n"
        print days[startday] + " is our ending day\n"

    for cur_rec in Lastdump.readline():
        work = cur_rec.split()

        if debug == 1:
            print "Starting table building pass . . .\n"
            print work
            print " is the contents of our split record line now\n"
            print cur_rec + " is the contents of cur_rec\n"

        #only go back 2 days

        while work[0] != days[startday]:
            tmp = work[1]
            if table.has_key(work[0]):
                continue
            elif tmp[0] != ':':
                #don't keep it if it isn't a SunRay terminal
identifier
                continue
            else:
                #now we keep it
                table[work[0]] = tmp
----

the first and second sets of debugging output show everything as they
should be...  the third shows that the next working line (in cur_rec),
and thus 'work', as well, only hold the first character of the line.
Here's the output:

----
Debugging run


Building table . . .

['dgetsman', 'pts/3', ':0.0', 'Wed', 'May', '21', '10:21', 'still',
'logged',
'in']
 is our split record line from /tmp/esd_tmp

Wed is the starting day

{'Wed': 'Mon', 'Sun': 'Fri', 'Fri': 'Wed', 'Thurs': 'Tues', 'Tues':
'Sun',
'Mon': 'Sat', 'Sat': 'Thurs'}
 is our dictionary of days

Mon is our ending day

Starting table building pass . . .

['d']
 is the contents of our split record line now

d is the contents of cur_rec

----
And thus everything fails when I try to work with the different fields
in subsequent script afterwards.  Does anybody have an idea as to why
this would be happening?

Oh, and if relevant, here's the datafile's first few lines:

----
dgetsman pts/3        :0.0             Wed May 21 10:21   still logged
in
dgetsman pts/2        :0.0             Wed May 21 09:04   still logged
in
dgetsman pts/1        :0.0             Wed May 21 08:56 - 10:21
(01:24)
dgetsman pts/0        :0.0             Wed May 21 08:56   still logged
in

I would really appreciate any pointers or suggestions you can give.

<a href="http://www.zoominfo.com/people/Getsman_Damon_-214241.aspx">
*Damon Getsman
Linux/Solaris System Administrator
</a>


From johnjsal at gmailNOSPAM.com  Thu May 22 23:37:45 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Thu, 22 May 2008 23:37:45 -0400
Subject: Relationship between GUI and logic?
Message-ID: <48363c34$0$15204$607ed4bc@cv.net>

I know that it is good programming practice to keep GUI and logic code 
physically separate, by using XRC for example, but I'm wondering if it's 
also good practice (and even possible) to keep them separate from an 
implementation standpoint as well. Basically what I mean is, should it 
be possible to write, for example, the logic for a strategy game without 
even knowing what the graphics will look like or how they will work?

To be more specific, let's say I want to create a simple, 2D strategy 
game. It will have a board layout like chess or checkers and the player 
will move around the board. Let's say this is all I know, and perhaps I 
don't even know *this* for sure either. Is it possible to write the 
logic for such a game at this point?

Let's say I want to write a "move" function (or perhaps it would be a 
method of a "Character" class) for moving the player around. Could you 
really write this function without 1) knowing what the interface will 
look like, and 2) integrating GUI code with the logic?

Another example could be printing messages to the player. If I need to 
say "You killed the monster!", is there a general way to write this, or 
do I need to specifically refer to GUI widgets and methods, etc. in 
order for it to be displayed properly?

Basically, the question is this: can you write the logic behind a 
program (whether it be a game, an email client, a text editor, etc.) 
without having any idea of how you will implement the GUI?

Thanks!


From tjreedy at udel.edu  Sat May 10 18:46:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 18:46:13 -0400
Subject: how to reference my own module ?
References: <4825F6BB.9090707@gmail.com>
Message-ID: <g058jk$jcb$1@ger.gmane.org>


"Stef Mientki" <stef.mientki at gmail.com> wrote in message 
news:4825F6BB.9090707 at gmail.com...
| hello,
|
| I've a library that I import as
|
|    import ppygui.api as gui
|
| the reason for this construct is that I've to use different libraries
| for different platforms.
|
| Now I like to write some examples in the library (activated by if
| __name__ == '__main__' :)
| and I would that these examples can be used in the user program just by
| copy / paste.
|
| For calling a function / class in the user program I've to write:
|
|    sizer = gui.VBox ()
|
| So also write exactly the same sentence in the library examples,
| but  "gui" is not recognized
|
| Any ideas how I can realize the above ?

Put the import statement in the example so 'gui' *is* recognized ;-)

If I understand what you meant ...
xploro/test/begin.py
-----------------------------
def start():
    print('hello')

if __name__ == '__main__':
    import xploro.test.begin as etb
    etb.start()
----------------------------
prints 'hello'|

Import is a name-binding statement that also creates a module when it does 
not exist already.  Modules can be bound to multiple names just like any 
other object.

Terry Jan Reedy





From mcknight0219 at gmail.com  Fri May 23 11:14:00 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 08:14:00 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
Message-ID: <8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>

On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jimmy schrieb:
>
> > On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> >> Jimmy wrote:
> >>> Hi to all
> >>> python now has grown to a versatile language that can
> >>> accomplish tasks for many different purposes. However,
> >>> AFAIK, little is known about its ability of kernel coding.
> >>> So I am wondering if python can do some kernel coding that
> >>> used to be the private garden of C/C++. For example, can python
> >>> intercept the input of keyboard on a system level? someone told me
> >>> it's a kernel thing, isn't it?
> >>http://wiki.python.org/moin/elmer
>
> > well, straightly speaking, how can I know a key is pressed on a system-
> > level if
> > using python?
>
> What has that todo with kernel programming? You can use e.g. pygame to
> get keystrokes. Or under linux, read (if you are root) the keyboard
> input file - I've done that to support several keyboards attached to a
> machine.
>
> And the original question: no, python can't be used as kernel
> programming language. Amongst other reasons, performance & the GIL
> prevent that.
>
> Diez

sorry, my aim is not limited to one particular program. Yes, many
library can
permit you to respond to keyboard event, however, what I want is a
universal
function. as long as a key is pressed, no matter where, my program can
repond.

I am quite strange with this topic. But according to my understanding,
any event, keyboard event
for example, once triggered, will be dilivered by keyboard driver to X
system, and then
any running program can either choose to respond or ignore. So my
question can be translated to:
how to make my program respond ?


From szrRE at szromanMO.comVE  Sat May 31 12:27:11 2008
From: szrRE at szromanMO.comVE (szr)
Date: Sat, 31 May 2008 09:27:11 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
Message-ID: <g1ru8v0v3l@news4.newsguy.com>

Peter Duniho wrote:
> On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:
>
>> Arne Vajh?j wrote:
>>> Stephan Bour wrote:
>>>> Lew wrote:
>>>> } John Thingstad wrote:
>>>> } > Perl is solidly based in the UNIX world on awk, sed, } > bash 
>>>> and C. I don't like the style, but many do.
>>>> }
>>>> } Please exclude the Java newsgroups from this discussion.
>>>>
>>>> Did it ever occur to you that you don't speak for entire news
>>>> groups?
>>>
>>> Did it occur to you that there are nothing about Java in the above ?
>>
>> Looking at the original post, it doesn't appear to be about any
>> specific language.
>
> Indeed.  That suggests it's probably off-topic in most, if not all,
> of the newsgroups to which it was posted, inasmuch as they exist for
> topics specific to a given programming language.

Perhaps - comp.programming might of been a better place, but not all 
people who follow groups for specific languages follow a general group 
like that - but let me ask you something. What is it you really have 
against discussing topics with people of neighboring groups? Keep in 
mind you don't have to read anything you do not want to read. [1]

> Regardless, unless you are actually reading this thread from the
> c.l.j.p newsgroup, I'm not sure I see the point in questioning
> someone who _is_ about whether the thread belongs there or not.

I would rather have the OP comment about that, as he started the thread. 
But what gets me is why you are against that specific group being 
included but not others? What is so special about the Java group and why 
are you so sure people there don't want to read this thread? [1] What 
right do you or I or anyone have to make decisions for everyone in a 
news group? Isn't this why most news readers allow one to block a 
thread?

> And if it's a vote you want, mark me down as the third person reading
> c.l.j.p that doesn't feel this thread belongs.  I don't know whether
> Lew speaks for the entire newsgroup, but based on comments so far,
> it's pretty clear that there unanimous agreement among those who have
> expressed an opinion.

Ok, so, perhaps 3 people out of what might be several hundred, if not 
thousand (there is no way to really know, but there are certainly a lot 
of people who read that group, and as with any group, there are far more 
readers than there are people posting, so, again, just because you or 
two other people or so don't want to read a topic or dislike it, you 
feel you can decide for EVERYONE they mustn't read it? Again, this is 
why readers allow you to ignore threads. Please don't force your views 
on others; let them decide for themselves. [1]


[1] I do not mean this topic specifically,  but in general,  if one
    dislikes a thread, they are free to ignore it. I find it rather
    inconsiderate to attempt to force a decision for everyone, when
    one has the ability to simply ignore the thread entirely.


-- 
szr 




From duncan.booth at invalid.invalid  Tue May 20 10:16:56 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 14:16:56 GMT
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <Xns9AA49B6C2E27Fduncanbooth@127.0.0.1>

Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:

> C OTOH was designed to be compiled to assembly code (or directly to 
> machine code) and as a result there are no (or virtually) no 
> implementations that interpret C or compile it to bytecode.

Have you considered Microsoft's C/C++ compiler targetted at .Net. That 
compiles to a bytecode known as MSIL which is then interpreted and/or JIT 
compiled to machine code.

> I love Python, but IMHO it's a bit silly to maintain that the fact that 
> Python compiles to byte code instead of assembly code/machine code is 
> purely a matter of implementation; on the contrary, I believe it's a 
> result of its design. I also think that there's a large difference 
> between byte code and machine code (in Python's case; I haven't looked 
> at other languages), and that it's a bit silly to try to trivialize that 
> difference.

And then there's IronPython which is targetted at .Net. That compiles to a 
bytecode known as MSIL which is then interpreted and/or JIT compiled to 
machine code.

-- 
Duncan Booth http://kupuguy.blogspot.com


From gagsl-py2 at yahoo.com.ar  Wed May  7 18:50:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 May 2008 19:50:44 -0300
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <op.uas22uw7x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 May 2008 18:38:15 -0300, globalrev <skanemupp at yahoo.se>  
escribi?:

> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
> 		return lambda x,inc=n: x+inc

lambda is just a shortcut for defining a function without a name.
The above code is the same as:

def addn(n):
     def inner(x, inc=n):
         return x+inc
     return inner

It should be clear now that addn returns a function. addn is a "function  
factory": builds functions by request. You ask it "give me a function that  
adds 5" and addn returns that function.

> if i do addn(5) it returns
>
>>>> addn(5)
> <function <lambda> at 0x01D81830>

If you try the other version, you would get:

<function inner at 0x00A3B970>

It's the same thing, except that lambda has no name.

> ok? so what do i write to make it actually do something.

adder5 = addn(5)
adder5(3)
-> 8

>  and is the
> inc=n necessary i cant do x+n?

Yes, you can, but there is a subtle difference that's hard to explain, and  
in this case it's absolutely irrelevant. Using inc=n "does the right  
thing" as it's a bit more efficient too.

-- 
Gabriel Genellina



From deets at nospam.web.de  Tue May  6 06:27:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:27:08 +0200
Subject: Bad form to access a *private variable* like _foo?
References: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>
	<48200a7f$0$23642$426a74cc@news.free.fr>
Message-ID: <68aq4nF2r9b93U4@mid.uni-berlin.de>

> The way you wrote it here, yes. If there's no official way to do the
> same operation and you have a real use case for it - in which case you
> may want to add a commit() method to SQLObject's model base class and
> submit the patch to SQLObject's maintainer. But I strongly suspect
> there's a better way to handle this case in SQLObject's API.

There are other ways. For example,

sqlobject.sqlhub.threadingLocal.connection

if your system is using multiple threads correctly. Generally speaking,
sqlhub could/should be used.


Diez


From zerty.david at gmail.com  Thu May 15 16:31:00 2008
From: zerty.david at gmail.com (David Anderson)
Date: Thu, 15 May 2008 17:31:00 -0300
Subject: How to make an Activation Issue?
Message-ID: <5dc598e30805151331h7d40ea7dt8c2cc4ef38385d2c@mail.gmail.com>

Hi, How can I make something like this...
The final user installs the app
The app Runs and the User has to authenticate the app, which will be by
acessing a remote file on a Server, If he user dont authenticate the program
will run only for 3 days, after that it will be blocked until the user
authenticates it...
How can I do this?
Cya =)
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From salmoni at gmail.com  Sat May 31 10:27:48 2008
From: salmoni at gmail.com (Alan J. Salmoni)
Date: Sat, 31 May 2008 07:27:48 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <238d3920-1b9d-4caa-b667-139f290e9d67@i18g2000prn.googlegroups.com>

I'm not certain if this is what you want but try this for the first
window:

import __main__
localvars = __main__.__dict__
dir(localvars) # lists names of all objects available to the
interpreter.

And then you can pass localvars anywhere in the program - so after a
command is entered in one window, you can import the all locals into
the other by putting this function in the second window:

def SetWindow2Locals(localvars):
    __main__.__dict__ = localvars

and do the reverse by sending the updated localvars from window 2 to
window 1. Setting up an object between the 2 windows should be enough:

# window 1, must be created first
import __main__
localvars = __main__.__dict__
# create second window (say, win2)
win2.SetLocals(localvars)

in win2 after creation, there is a method/function:

SetLocals(localvars):
    __main__.__dict__ = localvars

If you want to store the object in something like a DB, you can store
this localvars dictionary rather than the actual objects. This should
be efficient because it stores the object name and ID only but not the
objects themselves. However, if the objects are deleted, after saving
and before re-loading, you may get some odd results but I'm not sure.
I would be very careful of using this in the wild.

You can also add objects singly to the dictionary by hand with a
function:

def importobject(obj):
    __main__.__dict__[obj.__name__] = obj

Which should make them available in the other window easily. If a new
object is added to the __main__.__dict__, just grab it and send it to
this function. Make sure that you send the object and not just its
name because the name is only a string.

Sorry if this is not what you were after.

Alan

On May 29, 2:47 pm, lixinyi... at gmail.com wrote:
> Hi!
>
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
>
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
>
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?
>
> Maybe I could just build a small database to store all the values and
> access them from both programs, but chances are sometimes I have to
> deal with big arrays, and they will eat extra memory if I keep them in
> a database. Is there anyway to access a shell's local memory buffer?
> I tried to use shell.interp.locals() in wxPython, but there's too many
> variables in the list which I don't actually need.
>
> Come on guys, give me some ideas. Thanks in advance!



From Magnus.Moraberg at gmail.com  Tue May 27 05:05:23 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 02:05:23 -0700 (PDT)
Subject: HTTPError sometimes when using urllib2.urlopen
References: <5978cac5-27e1-40cd-9abe-9e7536395468@d45g2000hsc.googlegroups.com>
Message-ID: <7311fb13-b4bb-4605-ac5e-c434e54cd0f1@8g2000hse.googlegroups.com>

On 27 Maj, 11:03, Magnus.Morab... at gmail.com wrote:
> Hi,
>
> I have the following code -
>
> import urllib2
> from BeautifulSoup import BeautifulSoup
>
> proxy_support = urllib2.ProxyHandler({"http":"http://
> 999.999.999.999:8080"})
> opener = urllib2.build_opener(proxy_support)
> urllib2.install_opener(opener)
>
> page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
> membership.asp')
> soup = BeautifulSoup(page)
>
> pageText = soup.findAll(text=True)
> print pageText
>
> Sometimes when I run this code I get the exception -
>
> HTTPError: HTTP Error 407 Proxy authentication required
>
> I seem to get this error repeatidly for a while, then I go a surf for
> a moment and when I run the code again the exception might have gone
> away. No idea why...
>
> I have no problems with firefox which uses the same proxy. The proxy
> requires no authentication...
>
> What might the issue be?
>
> Thanks,
>
> Barry.

I'm running with Python 2.5 with PythonWin

Heres the full exception -

Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\pythonwin\pywin\framework
\scriptutils.py", line 409, in ImportFile
    reload(sys.modules[modName])
  File "C:\Documents and Settings\konbgn\Desktop\parse.py", line 8, in
<module>
    page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
membership.asp')
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 380, in open
    response = meth(req, response)
  File "C:\Python25\lib\urllib2.py", line 491, in http_response
    'http', request, response, code, msg, hdrs)
  File "C:\Python25\lib\urllib2.py", line 418, in error
    return self._call_chain(*args)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 499, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 407: Proxy Authentication Required


From wolfgang.grafen at ericsson.com  Tue May 20 07:57:55 2008
From: wolfgang.grafen at ericsson.com (Wolfgang Grafen)
Date: Tue, 20 May 2008 13:57:55 +0200
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <g0uec3$cai$1@news.al.sw.ericsson.se>

globalrev schrieb:
> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

Your example is comprehensive compared to many other suggestions which 
is an advantage IMO. I minimised it further

for i in range(start, stop, step):
     if not i%15:
         print "FizzBuzz"
     elif not i%3:
         print "Fizz"
     elif not i%5:
         print "Buzz"
     else:
         print i

Best regards

Wolfgang


From deets at nospam.web.de  Tue May 27 08:07:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 14:07:04 +0200
Subject: integration with browser
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<mailman.1638.1211878217.12834.python-list@python.org>
Message-ID: <6a2bs6F35a5cmU1@mid.uni-berlin.de>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
> 
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.

You know that Webkit is the engine behind Safari? And one of the more
compliant implementations out there - millions of mac-users only use
Safari.


Diez


From thomas.troeger.ext at siemens.com  Tue May 20 06:20:59 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 12:20:59 +0200
Subject: Newbie In Python
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <g0u8mc$54e$1@aioe.org>

andrew.smith.cpp at gmail.com wrote:
> I have Heard About "Python" its a OOD Language. i have to Learn it
> where from i should start it.
> i have python compiler at linux Platform.
> anyone can suggest me about it.
> 
> Thanks In advance.

How about http://docs.python.org/tut/tut.html?


From jstucklex at attglobal.net  Sun May 25 20:15:40 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:15:40 -0400
Subject: php vs python
In-Reply-To: <g1cuvj$1rpd$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
Message-ID: <V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 16:23:12 -0700, NC wrote:
> 
>>> I didn't say that it's not possible to write good code in PHP,
>> Indeed you didn't.  You did, however, say that development in Python/
>> Django is inherently faster than development in PHP (your exact words
>> were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
>> 50-fold difference).  This claim has just been obliterated using the
>> example you (not I) provided; my estimate of two man-years for
>> developing WordPress turns out to be fairly close to what has actually
>> gone into the development of Byteflow.  In other words, so far we have
>> discovered no evidence of Python's (or PHP's, to be fair) superiority in
>> terms of developer's productivity.
> 
> In this case (excellent blogging tool), yes, I agree.
> 
>>> IMHO Python language is better designed
>> That is indeed a matter of opinion.  You like (among other things)
>> immutable strings, the off-side rule, the idea that everything is an
>> object, and the fine distinction between mutable lists and immutable
>> tuples, and I have no problem with you liking these features, as long as
>> you agree that other people may have reasons to like the alternatives
>> better.
> 
> I agree. We like different things and it's good.
> 
>>> Yes, it's possible to write something clean in PHP but it would require
>>> a lot more work.
>> In my opinion, it wouldn't, and in my experience, it doesn't.  All you
>> need is to actually put a designer in charge of design.  Additionally,
>> there are situations (rapid prototyping, for example) when
>> maintainability (the requirement behind the "clean code") is simply not
>> a concern.
> 
> It's hard to me to write good PHP. I feel happy programming in Python and 
> I felt very unhappy when I had to program in PHP.  I'm glad that you have 
> a different experience.
> 
> Ivan
> 

It's very easy for me to write good code in PHP.  I can say the same for 
a number of other good programmers I know.

As I've said before - good programmers can write good code in any language.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From caca at mailinator.com  Fri May 30 08:54:39 2008
From: caca at mailinator.com (caca at mailinator.com)
Date: Fri, 30 May 2008 05:54:39 -0700 (PDT)
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>

  Your project interests me. Actually I was thinking about doing the
same. I hadn't worked on it at all, but I though about it and had the
idea about reading the session namespace directly, which I though
would be stored in the __dict__ attribute of something.

  After reading your post, I have been trying a little bit, and I have
found a way to do it with ipython. If you open an ipython console,
press _ then hit TAB, you'll see it stores some useful information,
including all input, all output, and after some searching, a
dictionary matching all variables to its values.

__IPYTHON__.user_ns

  There is a little extra stuff in there that you don't want, but that
can be easily filtered (the extra stuff is either 'In', 'Out', 'help'
or starts with '_'). I've tried it, and you can change the value in
that dict to alter the value of the real variable. Say you have a
variable 'test':

test=5
__IPYTHON__.user_ns['test']=4
print test #prints 5

  If I get it right, python is a dynamic language, and you won't break
things by messing around with its inner stuff like this, but you
better check it.

  Is this what you had in mind?


From stefan_ml at behnel.de  Fri May  9 06:37:13 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 12:37:13 +0200
Subject: source beautifier
In-Reply-To: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
References: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
Message-ID: <48242959.3030405@behnel.de>

Marco Mariani wrote:
> Is there a program (free, payware, whatever) like polystyle for
> linux/python?
> 
> http://www.polystyle.com/features/python-beautifier.jsp
> 
> I've never used it, but the example is quite clear.

I tend to believe that running these tools on some average Python code would
not even change whitespace. ;)


> I just need it for python -- but it should not force me to use PEP8.

IMHO, a tool that automatically corrects code to comply with PEP-8 would
actually be more helpful, but I guess that's pretty far reached.

Stefan


From spectrumdt at gmail.com  Tue May  6 06:31:28 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Tue, 6 May 2008 03:31:28 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
Message-ID: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>

Hello.

I am trying to install Pypvm (http://pypvm.sourceforge.net/), the
Python interface to PVM ("Parallel Virtual Machine"). Unfortunately,
installation fails. I am hoping someone can help me fix it.

I am running Fedora Core 8 Linux.

The official Pypvm documentation is very helpful (or something),
providing the following:



To build Pypvm, cross your fingers and try:

make -f Makefile.pre.in boot
make

Or alternatively, try
  python setup.py build
  python setup.py install



For me, the "make -f Makefile.pre.in boot" seems to run fine, but the
"make" fails, giving (among other things) the following:



[ore at localhost pypvm-0.94]$ make
gcc -pthread -fPIC -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
  -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -
march=i386
  -mtune=generic -fasynchronous-unwind-tables -D_GNU_SOURCE -fPIC
  -I/usr/include/python2.5 -I/usr/lib/python2.5/config    -c
  ././pypvm_coremodule.c -o ./pypvm_coremodule.o
././pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
././pypvm_coremodule.c: In function ?was_error?:
././pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in
this function)
././pypvm_coremodule.c:81: error: (Each undeclared identifier is
reported only once
././pypvm_coremodule.c:81: error: for each function it appears in.)
././pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use
in this function)
././pypvm_coremodule.c:85: error: ?PvmMismatch? undeclared (first use
in this function)
[...]
././pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first
use in this function)
././pypvm_coremodule.c:1767: warning: unused variable ?optModule?
././pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
././pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
././pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
././pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
././pypvm_coremodule.c:1762: warning: unused variable
?exceptionModule?
make: *** [pypvm_coremodule.o] Error 1
[ore at localhost pypvm-0.94]$



In in alternate version, "python setup.py build" similarly fails:



[ore at localhost pypvm-0.94]$ python setup.py build
running build
running build_py
running build_ext
building 'pypvm_core' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-
D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables -
D_GNU_SOURCE -fPIC -fPIC -I/usr/include -I/usr/include/python2.5 -c
pypvm_coremodule.c -o build/temp.linux-i686-2.5/pypvm_coremodule.o
pypvm_coremodule.c:2:18: error: pvm3.h: No such file or directory
pypvm_coremodule.c: In function ?was_error?:
pypvm_coremodule.c:81: error: ?PvmOk? undeclared (first use in this
function)
pypvm_coremodule.c:81: error: (Each undeclared identifier is reported
only once
pypvm_coremodule.c:81: error: for each function it appears in.)
pypvm_coremodule.c:85: error: ?PvmBadParam? undeclared (first use in
this function)
[...]
pypvm_coremodule.c:1889: error: ?PvmDupEntry? undeclared (first use in
this function)
pypvm_coremodule.c:1767: warning: unused variable ?optModule?
pypvm_coremodule.c:1766: warning: unused variable ?resultModule?
pypvm_coremodule.c:1765: warning: unused variable ?notifyModule?
pypvm_coremodule.c:1764: warning: unused variable ?spawnModule?
pypvm_coremodule.c:1763: warning: unused variable ?dataModule?
pypvm_coremodule.c:1762: warning: unused variable ?exceptionModule?
error: command 'gcc' failed with exit status 1
[ore at localhost pypvm-0.94]$



Can anyone help me get it to work?

Thanks in advance.
- Claus Appel


From castironpi at gmail.com  Thu May 15 22:39:55 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:39:55 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
	<mailman.1200.1210896482.12834.python-list@python.org> 
	<e742ff24-d76b-422c-9284-f6eddeb1789e@34g2000hsf.googlegroups.com>
Message-ID: <715d305d-c99f-431a-945b-d79d49bf382a@k37g2000hsf.googlegroups.com>

On May 15, 7:40?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 7:07?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > > On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> > >> Why can't I write this?
> > >> --
> > >>http://mail.python.org/mailman/listinfo/python-list
>
> > > yield recieved.
>
> > > Thanks.
>
> > Should that be
>
> > ack yield
>
> > ?
>
> I'd be putting parachutes on people's screens, but on a newsgroup. ?I
> might have time-parachutes too: something that lands softer.

Does anyone want furniture put in a room?


From max at alcyone.com  Thu May  8 21:15:54 2008
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 08 May 2008 18:15:54 -0700
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <sqSdnctEu8JXOL7VnZ2dnUVZ_uidnZ2d@speakeasy.net>

wxPythoner at gmail.com wrote:

> Have a look at this:
> 
>>>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 
> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 
> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.

Others have pointed out why this is not a parse error, as it's parsed as 
-(123**0), not (-123)**0, which is apparently what you meant.

Note, however, that even normal mathematical conventions follow this 
same rule.  If you were to write

	  2
	-x

as part of a mathematical equation, this means (translated to Python) 
-(x**2), not (-x)**2.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
   I sleep and dream that life is / All beauty
    -- Lamya


From ganeshborse at gmail.com  Fri May  9 09:41:00 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Fri, 9 May 2008 06:41:00 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
Message-ID: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>

I am creating functions, the return result of which I am using to make
decisions in combined expressions.
In some expressions, I would like to inverse the return result of
function.

E.g. function contains(source,search) will return true if "search"
string is found in source string.
I want to make reverse of this by putting it as:
if ( ! contains(s1,s2) ):
     return 1

I found that "!" is not accepted by Python & compile fails with
"invalid syntax".
Corresponding to this Boolean Operator we've "not" in Python.

How can I make "not" as "!"?


From grante at visi.com  Fri May 23 10:13:38 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 23 May 2008 09:13:38 -0500
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
Message-ID: <8bmdnUdysIKPTKvVnZ2dnUVZ_vqdnZ2d@posted.visi>

On 2008-05-23, Peter <p.wallstedt at gmail.com> wrote:
> On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
>> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>>
>> > I have a small but rather annoying problem withpyserial. I want to
>> > open a file on disk for reading and then open a com-port, write lines
>> > from the file to the port and then read something back and compare it
>> > to the next line in the file. Should be simple. And it is, apart from
>> > the fact that the file seems to be doubled ...? Or it loops through
>> > the file twice.
>>
>> > If I exclude the "import serial" it works.
>>
>> > Any ideas?
>>
>> Your problem is in line 117 of your program.
>
> Do you have to much time?

"Do you have a sense of irony?" he asked, already knowing the answer.

-- 
Grant



From ian.g.kelly at gmail.com  Tue May  6 12:01:04 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 10:01:04 -0600
Subject: Reversing a dict?
In-Reply-To: <fvptae$2ve$1@gemini.csx.cam.ac.uk>
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<fvptae$2ve$1@gemini.csx.cam.ac.uk>
Message-ID: <3fc761710805060901y436174ecw536c70f8a00ddaa0@mail.gmail.com>

On Tue, May 6, 2008 at 9:26 AM, Jeremy Sanders
<jeremy+complangpython at jeremysanders.net> wrote:
> krumblebunk at gmail.com wrote:
>
>  > Hi - further to my earlier query regarding partial matches (which with
>  > all your replies enabled me to advance my understanding, thanks), I
>  > now need to reverse a dict.
>
>  There is no guaranteed order to the items stored in a dictionary. They can
>  and will move around as the dict is modified. Have a look at
>  diveintopython:
>
>  http://www.diveintopython.org/getting_to_know_python/dictionaries.html
>
>  You'll have to store your keys in a list or tuple to keep them ordered.

You might also take a look at the odict[1] or ordereddict[2] modules.

[1] http://www.voidspace.org.uk/python/odict.html
[2] http://www.xs4all.nl/~anthon/Python/ordereddict/


From kamhung.soh at gmail.com  Wed May 28 02:22:00 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 28 May 2008 16:22:00 +1000
Subject: convert string number to real number - ValueError: invalid  
	literal for int() with base 10: '"2"'
In-Reply-To: <491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
Message-ID: <g1itm9$rf0$1@ger.gmane.org>

David Jackson wrote:
> i used the csv module and saved its contents to a list.
> 
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
> 
> 
> the credit/debit fields are strings.
> what should i have done within the CSV module to make numbers appear as 
> numbers?
> how can i remove the quotes to make them numbers? i realize i posted a 
> solution to this once before (same posting thread) but i am thinking 
> there is a better method.

There doesn't seem to be a way to describe how specific columns should 
be processed in the csv module.  You could define a conversion function 
that "guesses" the best conversion, for example:

def str2num(datum):
  	try:
  		return int(datum)
  	except:
  		try:
  			return float(datum)
  		except:
  			return datum

for row in csv.reader(file(r'Transaction.csv')):
	[str2num(cell) for cell in row]

['Date', 'No.', 'Description', 'Debit', 'Credit']
['3/17/2006', 5678, 'ELECTRONIC PAYMENT', '', 11.449999999999999]
['3/04/2007', 5678, 'THE HOME DEPOT 263 SomeCity FL', '', 
25.399999999999999]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From quentel.pierre at wanadoo.fr  Tue May 27 11:30:22 2008
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Tue, 27 May 2008 08:30:22 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <973b4193-0d0a-4800-9e5c-3bcb0115bace@56g2000hsm.googlegroups.com>

On 25 mai, 18:58, erik.oosterw... at gmail.com wrote:
> Hi All,
>
> I have been developing websites in classic asp using VB script for a
> long while now. Due to the fact that I also took a detour to
> developing ColdFusion, and the fact the companies I work(ed) for never
> had time or money for courses, I am now in the awkward position that I
> am -still- developing classic ASP.
>
> In it, I have become quite resourceful, I wrote a framework using WSC
> (windows scripting components) to separate logic from presentation,
> and my display pages use almost no logic, except for the loops and
> variables I need to build my pages. I have a three-tier setup and all
> business logic is in separate WSC files. The framework even uses an
> ORM for access to the tables of my database. This works like a charm.
> It makes classic ASP code maintainable, it makes working in classic
> ASP very pleasant actually and it makes our customers very happy.
>
> The problem is that classic asp is now a dead language, I need to
> modernize and fast! Although the arguments some people make against it
> are not valid for me (spaghetti code, unmaintainable, slow), I still
> see that there is little to no support for it anymore.
>
> The most logical way to "update" my knowledge to something more
> modern, would be to dive into ASP.NET. I considered that for a long
> time, but there are some problems with this:
>
> 1. I love the control I have over my html using inline, template-based
> vbscript. ASP.NET's web forms really sound like a very bad idea, also
> the approach Microsoft takes in trying to make a stateless web-app
> seem like a statefull application is IMHO a burden. I think webapps
> are inherently different than desktop apps, and should be programmed
> as such.
>
> 2. Who says Microsoft isn't going to pull the plug on VB.NET in a
> while or make a drastic change like they did from asp to asp.net
> again, some time in the future?
>
> 3. I like the rapid development I can do in a dynamic, loosely typed
> language like vbscript. The performance-bottleneck of a site is mostly
> in the database-access and the http-calls and I think writing all of
> the declarations and types for a strong-typed language is overkill for
> a webapp.
>
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
>
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.
>
> As Python would be the language I prefer over Ruby, I thought I'd ask
> here to see if anyone in the Python community knows if such a
> development-framework exists in Python. For example, does IronPython
> also use the same web forms approach as asp.net using VB? The
> frameworks I looked at (Django, Pylons) seem to be able to use
> different templating engines, does that mean it's just a question of
> finding the right one?
>
> Also, for Python there is also the problem of meaningful indentation.
> I'm not even sure if it's possible to use Python directly inside HTML,
> because indentation would be at the very least tricky to maintain. I'm
> kind of hoping here that there are some solutions to these problems
> available in Python.
>
> ?Any help would be greatly appreciated.
>
> Kind regards,
>
> Erik

Hi,

You can take a look at Karrigell (http://karrigell.sourceforge.net).
It's very simple to install, stable (the first version was published
in 2002) and among the programming styles provided you will find
"Python Inside HTML" which is as close as you can get to PHP or ASP

===================
<h1>Squares</h1>
<%
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)
%>
===================

Regards,
Pierre


From jcd at sdf.lonestar.org  Mon May  5 13:44:43 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 05 May 2008 13:44:43 -0400
Subject: generator functions in another language
In-Reply-To: <cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>
	<mailman.570.1209965348.12834.python-list@python.org>
	<cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>
Message-ID: <1210009483.25126.4.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 10:08 -0700, castironpi at gmail.com wrote:
> At some point, code goes "on" and "off" the processor, which knowledge
> I do owe to spending money.  Thus, if the group news is a localcy
> (other dimension of currency), that's bounce check the house dollar.
> What do [second person plural] spend on [vernacular]? 

Sometimes I'm not sure whether castironpi is a bot or a really good
troll who wants us to think he or she is a bot.  

At any rate, somebody's having a chuckle.



From dullrich at sprynet.com  Tue May 20 06:29:45 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 05:29:45 -0500
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <hv9534p3j7veljs7ghbsfnb9d9gob82e5v@4ax.com>

On Sun, 18 May 2008 18:20:22 -0400, John Salerno
<johnjsal at NOSPAMgmail.com> wrote:

>Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)

You might get a keyboard with an Enter key, btw. Anyway:

I'm a math professor, not a programmer.
I use Python probably every day to do
all sorts of things, for example:

(i) Calculating grades. (Ok, this could be done in
Excel. But if you know Python anyway you don't need
to figure out how to do various things in Excel.
Quick: In Excel how do you take all the quiz
scores, drop the lowest _two_ of them and average
the rest? Stumps people sometimes - if you're
doing it by hand in Python it's no problem, you
just do it.)

(ii) Every semester I get a lot of emails asking
about grades. Used to be tedious typing the same
replies over and over, looking up the relevant
numbers. A littls Python script takes the student's
name, looks up the numbers and generates a reply
automatically, including a summary of the scores
and an explanation of how the grade was calculated.)

(iii) Taking various data from various places and making
it into HTML to post on the department web site.
(Please don't look - a lot of that stuff is currently
broken due to improvements on the server introduced
by other faculty. These things happen when nobody's
in charge so things get done by whoever's willing
to do them...)

(iv) Say I want to display the following system
of equations on a quiz:

  3x + 2y + z = 3
   x      - z = 1.

Writing TeX to get the variables to line
up properly can be tedious. A little Python
thingie takes lists of variable names and
coefficients and automatically produces
TeX that displays the equations exactly right.

I could go on and on - I use computers for a lot
of things, and any time I want to do something
but it's not obvious how to do it in the relevant
big program Python gets pulled out to do the job. 

A meta-example: I'm about to publish a book on 
[never mind, the topic is still secret.] Python 
has been incredibly useful in writing that book, 
in many different ways. For example:

(v) Making modifications to the text itself. For
example, the other day I finally figured out how
to make a certain aspect of the thing look right.
So I wanted to replace every "$$[w]\qed" in the
text (where [w] denotes any amount of white space)
with "\QED$$". Took about a minute to make a Python
script to go through the entire book and make the
change.

(vi) There are a lot of figures. Some fairly
complicated, illustrating fairly complicated
mathematical things. The figures are eps files
that were generated by Python scripts. The simple
ones could just have easily been done in Adobe
Illustrator or Corel Whatever, but there's no
way you're going to use a mouse-based program
like that to draw the complicated figures and
have everything in exactly the right place.
I have Python do the calculations and then
write the corresponding eps file, done.

(vii) Many magical things were done with a
combination of TeX macros and Python scripts.
For example, index entries: If I say
\index{Some Theorem} in the text and it turns
out that that's on page 37 then
"Some Theorem p.37" appears in the index;
now if something gets revised so the
\index{Some Theorem} is now on page 38 then
the index entry is automatically revised to
page 38.

Or: The first page of Chapter n+1 is supposed
to be the smallest odd number larger than the
last page of Chapter n. A Python script typesets
("texs") each chapter; after typesetting Chapter
n it looks and sees what the last page is,
figures out what the first page of Chapter n+1
should be, and modifies the code for Chapter n+1
to start on the page before typesetting it.

If I wrote this tomorrow the list of examples
would be different. Just now over on 
comp.text.tex I showed someone a Python solution
to a problem he had. I don't know if he's going 
to use it - he _would_ need to learn a _little_
Python first. But it's what I'd use if _I_ wanted
to solve the problem! Other people suggested various
programs available that would solve his problem
for him - writing a little Python to give the
solution took less time than downloading one
of those programs would have.

>Thanks.

David C. Ullrich


From afilash+python at gmail.com  Thu May 22 08:57:40 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Thu, 22 May 2008 18:27:40 +0530
Subject: can someone with guessing a number
In-Reply-To: <5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
	<9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
	<5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>
Message-ID: <9f9d35df0805220557xfc858a7md4e6063ff9287c06@mail.gmail.com>

Gary,
  There is a problem in using this sys.exit()
if you are working in windows IDLE, then it will ask you for an 'exit
altogether'

so either change your 'while' clause or restructure your whole program to
fit your idea :-) to avoid failed and success messages together

cheers ,
abhilash

On Wed, May 21, 2008 at 10:35 PM, Dan Upton <upton at virginia.edu> wrote:

> On Wed, May 21, 2008 at 12:55 PM, abhilash pp <afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
> wrote:
> >> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
> >>>
> >>> I would just like the program to exit after guessing the amount of
> >>> numbers wrong
> >>>
> >>> # Guess My Number
> >>> import random
> >>> the_number = random.randrange(100) + 1
> >>> tries = 1
> >>> # guessing loop
> >>> while (guess != the_number):
> >>>     if (guess > the_number):
> >>>         print "Lower..."
> >>>     else:
> >>>         print "Higher..."
> >>>
> >>>     guess = int(raw_input("Take a guess: "))
> >>>     tries += 1
> >>>     if tries > 10:
> >>>         print 'you failed- give up'
> >>>
> >>> print "You guessed it!  The number was", the_number
> >>> print "And it only took you", tries, "tries!\n"
> >>>
> >>> raw_input("\n\nPress the enter key to exit.")
> >>>
> >>> many Thanks
> >>> --
> >>> http://mail.python.org/mailman/listinfo/python-list
> >>
> >     if tries > 10:
> >         print 'you failed- give up'
> >         break
> > <------------------- use this
> >
>
> That won't work as written, because it'll print "you failed," then
> break, then print "You guessed it!"...
>
> As an alternative to what I suggested before, if you really just want
> to end the program, you could also do
>
> from sys import exit
>
> <rest of code>
>
>    if tries > 10:
>        print 'you failed- give up'
>         exit()
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Tue May 20 10:04:56 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 14:04:56 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<69fbjvF2uih6aU6@mid.uni-berlin.de>
Message-ID: <Xns9AA4989662957duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:
> 
>> 2.  It is not clear to me how a python web application scales.
> 
> Ask YouTube.  :-)

Or look at Google appengine where unlike normal Python you really are 
prevented from making good use of threading.

Google App Engine takes an interesting approach by forcing the programmer 
to consider scalability right from the start: state is stored in a 
distributed database which cannot do all the hard to scale things that SQL 
databases do. This means that you have to work as though your application 
were spread on servers all round the world from day 1 instead of waiting 
until the structure that was 'good enough' is threatening to kill your 
business before you address them.

It also puts strict limits on how much a single web request can do, so 
again you have to work from day 1 to make sure that page requests are as 
efficient as possible.

In return you get an application which should scale well. There is nothing 
Python specific about the techniques, it is just that Python is the first 
(and so far only) language supported on the platform.

-- 
Duncan Booth http://kupuguy.blogspot.com


From Sam.Dutton at itn.co.uk  Sun May 25 04:41:55 2008
From: Sam.Dutton at itn.co.uk (Dutton, Sam)
Date: Sun, 25 May 2008 09:41:55 +0100
Subject: finding icons for Apps
Message-ID: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>

http://tango.freedesktop.org/

..as used by OpenOffice, Gimp, Pidgin (Gaim), etc.

However, if you only need a few basics (Save, Print, etc.) just use the 'standard' for the platform. Whatever you do, don't mix different styles of icon.

Note that for Windows the application icon (the thing you see on the Desktop or in a folder) is done as an .ico file, which has multiple sizes in the same file. You'll need to create this in an editor such as Visual Studio.

Sam Dutton
 





SAM DUTTON
SENIOR SITE DEVELOPER

200 GRAY'S INN ROAD
LONDON
WC1X 8XZ
UNITED KINGDOM
T +44 (0)20 7430 4496
F 
E Sam.Dutton at itn.co.uk
WWW.ITN.CO.UK

P  Please consider the environment. Do you really need to print this email?
Please Note:

 

Any views or opinions are solely those of the author and do not necessarily represent 
those of Independent Television News Limited unless specifically stated. 
This email and any files attached are confidential and intended solely for the use of the individual
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If you have received this email in error, please notify postmaster at itn.co.uk 

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From wuwei23 at gmail.com  Thu May 29 09:32:29 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 06:32:29 -0700 (PDT)
Subject: Tuple of coordinates
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <cb39f9e3-899d-4365-b306-1cca132ee495@u36g2000prf.googlegroups.com>

On May 29, 10:16 pm, "victor.hera... at gmail.com"
<victor.hera... at gmail.com> wrote:
> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>      for j in (beg, end, step):
>           for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>
> Victor

>>> coords = [(x,y,z) for x in range(0,10) for y in range(0,10) for z in range(0,10)]



From stefan_ml at behnel.de  Fri May 23 03:22:06 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 23 May 2008 09:22:06 +0200
Subject: where is the Write method of ElementTree??
In-Reply-To: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
Message-ID: <4836709E.6000003@behnel.de>

gray.bowman at gmail.com wrote:
> I'm messing around with trying to write an xml file using
> xml.etree.ElementTree.  All the examples on the internet show the use
> of ElementTree.write(), although when I try to use it it's not
> available, gives me ...
> 
>    ElementTree(sectionElement).write("section.xml")
> TypeError: 'module' object is not callable

I guess you did

    from xml.etree import ElementTree

Then you should do this:

    ElementTree.ElementTree(sectionElement).write("section.xml")

sadly, the module names in ET are upper case and look like classes...

Stefan


From ivan.illarionov at gmail.com  Thu May  1 13:07:28 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 17:07:28 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
Message-ID: <fvctcg$31i9$1@news.mtu.ru>

On Thu, 01 May 2008 11:11:29 -0500, Jon Ribbens wrote:

> On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>> IMO .ini-like config files are from the stone age. The modern approach
>> is to use YAML (http://www.yaml.org).
> 
> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and so
> comprehensively and completely fails to achieve its stated main goal of
> being "readable by humans", that I had assumed it was an April Fool
> along the lines of Intercal or brainf***.
> 
> I certainly wouldn't recommend it as being suitable for, well, anything
> at all.
> 
> Or were you trolling and I missed the joke? ;-)

No, it isn't. I acually find it usefull and readable. I don't think that 
programmers at Google would use something that is a joke. 

I used XML files before for this purpose and found YAML much easier and 
better suitable for the task.

Please explain why don't like YANL so much?

PS. Your reply remind me of early days of Python when Perl programmers 
said exacly the same thing about Python.

-- 
Ivan




From tonal at promsoft.ru  Thu May 15 23:46:33 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Fri, 16 May 2008 10:46:33 +0700
Subject: ?
In-Reply-To: <51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
Message-ID: <482D0399.5090804@promsoft.ru>

urikaluzhny wrote:
>> | It seems that I rather frequently need a list or iterator of the form
>> | [x for x in <> while <>]
>> I can think of two ways to interpret that.
> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> the expression <B> is false.
How do you plan to modify B during iteration?
May be
[x for x in itertools.takewhile(<B>, <A>)]
when <B> function accept element <A> and return True or False




From tjreedy at udel.edu  Mon May 12 22:38:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 22:38:10 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local><mailman.1008.1210635369.12834.python-list@python.org>
	<e0ea51fe-7279-434b-9e21-c15554624003@2g2000hsn.googlegroups.com>
Message-ID: <g0auuf$lb7$1@ger.gmane.org>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:e0ea51fe-7279-434b-9e21-c15554624003 at 2g2000hsn.googlegroups.com...
On May 12, 7:35 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Ohad Frand" <ohad.fr... at percello.com> wrote in message
>
> news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
> | I am looking for a way to programmically get a list of all python
> | existing statements that I cannot access by __builtins__ or locals()
> | (like ["assert","break","class",...])
>
> You appear to want the keywords that begin statements. Look at the 
> keyword
> list in the language reference and pick those you want. Then build that
> list into your program.

Someone already did it:

import keyword
print keyword.kwlist
=========================

I forgot about that.  However, I got the impression that the OP wants a 
subset, and if so, *that* will require hand selection. 





From kris at FreeBSD.org  Thu May 29 18:10:22 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Fri, 30 May 2008 00:10:22 +0200
Subject: UNIX credential passing
Message-ID: <483F29CE.7060104@FreeBSD.org>

I want to make use of UNIX credential passing on a local domain socket 
to verify the identity of a user connecting to a privileged service. 
However it looks like the socket module doesn't implement 
sendmsg/recvmsg wrappers, and I can't find another module that does this 
either.  Is there something I have missed?

Kris


From castironpi at gmail.com  Tue May 13 10:45:32 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:45:32 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <baeabd42-1edd-4eb0-8481-adc7bdeb6f12@m3g2000hsc.googlegroups.com>

On May 13, 9:34?am, hdante <hda... at gmail.com> wrote:
> On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > Don't let yourself be irritated by castironpi
>
> > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > interaction.
>
> > Not this interaction, I'm afraid. ?What irritates *me* about
> > castironpi is that he uses a chatterbot to clutter up the threads
> > here. ?If you go back to his postings from a year ago (and selected
> > ones since), his comments are coherent and sensible. ?These rambling
> > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > his idea of a joke. ?But they are certainly not worth your time in
> > trying to respond to them.
>
> > -- Paul
>
> ?I don't think castironpi so annoying that I should filter its
> messages. It would be enough if he were better tuned. He is much
> smarter than the emacs shrink, for example. :-P
>
> ?The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.- Hide quoted text -
>
> - Show quoted text -

What is a tank a tank of?  Even if it does, developer communities are
willing to sustain it.  That's a pretty colinear judgement, that I
find the community sustainable.  Does anyone commute to out of
control?  What is to out?  No jumping down thrown.  Tut tut.


From martin at v.loewis.de  Sat May 10 02:55:59 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 08:55:59 +0200
Subject: RELEASED Python 2.6a3 and 3.0a5
In-Reply-To: <90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>
References: <mailman.820.1210290618.12834.python-list@python.org>
	<90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>
Message-ID: <482546ff$0$14157$9b622d9e@news.freenet.de>

> I'm trying to install on the latest Ubuntu (8.04) and the following
> extension modules fail:
> 
> _bsddb, _curses, _curse_panel, _hashlib, _sqlite3, _ssl, _tkinter,
> bz2, dbm, gdbm, readline, zlib
> 
> All of them except for _tkinter are included in the preinstalled
> Python 2.5.2, so I guess the dependencies must be somewhere there.
> Does Ubuntu have any non-standard lib dir ?

You need to manually install the -dev packages (through aptitude)
before building Python.

Regards,
Martin


From bellman at lysator.liu.se  Tue May 20 10:38:01 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 14:38:01 +0000 (UTC)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
	<m2lk247vdd.fsf@googlemail.com>
Message-ID: <g0uno9$i5i$1@news.lysator.liu.se>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> from collections import defaultdict
> d = defaultdict(int) # That means the default value will be 0
> for person in people:
>     d[person.fav_food] += 1

Ah!  I didn't think of using int as the factory function.  If you
use this, then I believe the warning I gave about performance
does not apply; my understanding is that calling built-in functions
(like the int constructor) is fast.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"Beware of bugs in the above code; I have    !  bellman @ lysator.liu.se
 only proved it correct, not tried it."      !  Make Love -- Nicht Wahr!


From bj_666 at gmx.net  Fri May  2 02:48:06 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 06:48:06 GMT
Subject: no cleanup on TERM signal
References: <WSwSj.236857$pM4.38686@pd7urf1no>
Message-ID: <67vrp6F2r409aU1@mid.uni-berlin.de>

On Fri, 02 May 2008 04:36:06 +0000, Yves Dorfsman wrote:

> x.del() gets executed if:
> -I del x, then run gc.collect()
> -simply exit the script
> -get the script to abort on an exception
> 
> But if I kill it with the default signal TERM, the script dies, but I don't 
> get the message, so I am assuming that python isn't taking the time to 
> cleanup, even though that is (was) what TERM was intended for.
> 
> Has this been discussed before ? Is worth a suggestion (PEP) ?

There is the docs for `__del__()` saying this method is not guaranteed to
be called at all.  Don't use it if you *need* that method to be called. 
Just like `finalize()` in Java, it can't be used for deterministic
destruction, so it's not that useful after all.

Ciao,
	Marc 'BlackJack' Rintsch


From wuwei23 at gmail.com  Tue May 27 00:32:04 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 21:32:04 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <13c751dd-6a86-4e53-a389-9515b9e95494@x19g2000prg.googlegroups.com>

On May 27, 12:46 pm, notnorweg... at yahoo.se wrote:
> what do i need to do?

Ideally, you need to read some introductory material and stop
offloading whatever the hell it is you're doing to this group.


From castironpi at gmail.com  Sun May  4 07:22:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 04:22:31 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
Message-ID: <7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>

On May 4, 12:33?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > Is there a good place to look to see where I can find some code that
> > will help me to save webpage's links to the local drive, after I have
> > used urllib2 to retrieve the page?
> > Many times I have to view these pages when I do not have access to the
> > internet.
>
> Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> --
> Gabriel Genellina

A lot of the functionality is already present.

import urllib
urllib.urlretrieve( 'http://python.org/', 'main.htm' )
from htmllib import HTMLParser
from formatter import NullFormatter
parser= HTMLParser( NullFormatter( ) )
parser.feed( open( 'main.htm' ).read( ) )
import urlparse
for a in parser.anchorlist:
    print urlparse.urljoin( 'http://python.org/', a )

Output snipped:

...
http://python.org/psf/
http://python.org/dev/
http://python.org/links/
http://python.org/download/releases/2.5.2
http://docs.python.org/
http://python.org/ftp/python/2.5.2/python-2.5.2.msi
...


From duncan.booth at invalid.invalid  Fri May 16 10:14:47 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 May 2008 14:14:47 GMT
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <Xns9AA09B0D4F874duncanbooth@127.0.0.1>

rocco.rossi at gmail.com wrote:

> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
> 
> foo = some_function("foo")
> 
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
> 
> Thank you.
> 

 vars()["foo"]

but if you are doing this you are almost certainly making your life harder 
than it needs to be. Usually you really just want to keep the values in a 
dict.

-- 
Duncan Booth http://kupuguy.blogspot.com


From gneuner2/ at /comcast.net  Fri May  2 05:03:59 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Fri, 02 May 2008 05:03:59 -0400
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<9pof14t22rpq24219q0an2748i5f054qr4@4ax.com>
	<88273bc8-5152-4dfd-9f96-1d6ee2b83f99@e53g2000hsa.googlegroups.com>
	<op.uae6cwlgut4oq5@pandora.alfanett.no>
Message-ID: <h1ml14tsjh4dgd3dd097fnc0d7sqod1dge@4ax.com>

On Wed, 30 Apr 2008 12:35:10 +0200, "John Thingstad"
<jpthing at online.no> wrote:

>P? Wed, 30 Apr 2008 06:26:31 +0200, skrev George Sakkis  
><george.sakkis at gmail.com>:
>
>>
>>        \|||/
>>          (o o)
>> ,----ooO--(_)-------.
>> | Please            |
>> |   don't feed the  |
>> |     TROLL's !     |
>> '--------------Ooo--'
>>         |__|__|
>>          || ||
>>         ooO Ooo
>
>Doesn't copying Rainer Joswig's troll warning constitute a copywright  
>infrigment :)

It's not an exact copy of Rainer's so it may be arguable whether it
violates his copyright.  Might have more luck with a trademark
argument - distorted marks may still infringe.

George
--
for email reply remove "/" from address


From jkugler at bigfoot.com  Fri May 16 16:08:24 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Fri, 16 May 2008 12:08:24 -0800
Subject: IDE for Python
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
Message-ID: <g0kpjo$5hd$1@ger.gmane.org>

Jonathan Barbero wrote:
>  I?m newbie with Python and to learn it better I want to use a good IDE to
> concentrate on Python power. There is any IDE like Eclipse for Java for
> Python? If not, what is the best Python?s IDE for you?

This is an EFAQ (extremely frequently asked question).

http://www.google.com/search?hl=en&q=python+ide+site%3Amail.python.org%2Fpipermail%2Fpython-list%2F&btnG=Google+Search

j



From aspersieman at gmail.com  Mon May 26 12:42:12 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 26 May 2008 18:42:12 +0200
Subject: IOError in windows service
In-Reply-To: <op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <483A85C6.20803@gmail.com>
	<op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <483AE864.3000708@gmail.com>

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From workitharder at gmail.com  Fri May 23 16:17:28 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 13:17:28 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
	<p%EZj.19189$255.2014@bignews8.bellsouth.net>
Message-ID: <ce386e5a-514e-4faf-a679-138f14f9a7e4@t54g2000hsg.googlegroups.com>

On May 23, 12:35 pm, "inhahe" <inh... at gmail.com> wrote:
> "
> I wish this worked:>>> def main(a,b,*argv): pass
> >>> options['argv'] = argv
> >>> main(**options)
>
> TypeError: main() got an unexpected keyword argument 'argv'
> "
> -----
> I was thinking about that exact same thing actually.  Except that I was
> thinking you might want it like this, otherwise it could be ambiguous:
>
> >>> def main(a,b,*argv): pass
> >>> options['*argv'] = argv
> >>> main(**options)
>
> Weird I know, to put the * operator inside the string.  I suppose the
> necessity of doing that just shows why it wasn't implemented in the first
> place.  But still, it would be neat...
>
> Also, of course, you could then do
> main(*argv=[2,3])
>
> or rather
>
> main(*argv=[3,4],a=1,b=2) #in random order

Yes I think something like that would be an improvement. I wonder if
anyone would help me write a PEP... It might not be too hard to pass
since it would be compatible with all existing code. I'd be willing to
produce a patch against python2 or py3k.

I don't see that leaving off the * makes it ambiguous, since there can
only be one argument with that name:
def f(args, *args): pass
SyntaxError: duplicate argument 'args' in function definition


From jeffober at gmail.com  Fri May  2 15:50:51 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:50:51 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org> 
	<481B27D9.3000107@behnel.de>
	<eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>
Message-ID: <286490d5-01ce-40c5-8965-9e3da4fea1c9@w74g2000hsh.googlegroups.com>

Use lisp?


From gherron at islandtraining.com  Tue May 13 04:10:59 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 01:10:59 -0700
Subject: question about python statements
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>
Message-ID: <48294D13.4020600@islandtraining.com>

Ohad Frand wrote:
> Hi Gary
>
> Sorry that I was not clear, I hope that this time I will explain myself
> better.
>
> I can get list of all builtin functions in python by dir(__builtins__).
> This return a list of string with most known names to python language
> such as: 
> [... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
> 'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow', 'property',
> 'quit', 'range', 'raw_input', 'reduce', 'reload'...]
>
> But I don't know how to generate the next list of builtin python
> statements:
> ['assert','break','class','continue','def','del','elif','else','except',
> 'exec','finally','for','from','global',
> 'if','import','pass','print','raise','return','try','while','yield']
>   

There is no way you can consider 'elif', 'else', 'except', and 'from' 
statements.  However, as someone pointed out, the kwlist from the 
keyword module is the closest thing we can think of to the list you are 
asking for.

On the other hand, what's wrong with constructing the list as you did in 
your example above?


Just out of curiosity, *why* do you want this list.   Perhaps is we knew 
that, we could think of a programmatic way to construct the list you 
want.   The biggest challenge at the moment is that we have no idea what 
you mean by statement, but it is certainly not what Python considers 
statements.

Gary Herron



> Thanks,
> Ohad Frand
>
> -----Original Message-----
> From: Gary Herron [mailto:gherron at islandtraining.com] 
> Sent: Monday, May 12, 2008 10:41 PM
> To: Ohad Frand
> Cc: python-list at python.org
> Subject: Re: question about python statements
>
> Ohad Frand wrote:
>   
>> Hi
>>
>> I am looking for a way to programmically get a list of all python 
>> existing statements that I cannot access by __builtins__ or locals()
>>
>> (like ["assert","break","class",...])
>>
>> Thanks,
>>
>> Ohad
>>
>>
>>     
> ------------------------------------------------------------------------
>   
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>     
> Sorry, I've no idea what you mean here. Perhaps you could help us by 
> defining what you mean by
> "statements that I cannot access by __builtins__ or locals()"
>
> Is there any statement that you *can* access in such a way?
>
> What does it even mean to "access a statement"?
>
> Do you even have a list of "statements" from which we are to work? 
> Python is a little unusual in what it considers statements.
>
> Gary Herron
>
>
>
>
>   



From casey.mcginty at gmail.com  Fri May 30 02:01:29 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Thu, 29 May 2008 20:01:29 -1000
Subject: Code execution in imported modules
In-Reply-To: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>
References: <92da89760805291743p4f88b15ao14c9f990c1c50162@mail.gmail.com>
Message-ID: <ae3f58470805292301r253fc63ay45907190d525ab1@mail.gmail.com>

On Thu, May 29, 2008 at 2:43 PM, Eric Wertman <ewertman at gmail.com> wrote:

> So I'm working on some file parsing and building up a stack of regular
> expressions that I need to use.  I was thinking of dropping them in an
> external module.  I was wondering.. if I put them in a file called
> regex.py like so :
>
> import re
>
> re1 = "..
> re2 = "..
>
> and then do:
>
> rgx1 = re.compile(re1)
> rgx2 = re.compile(re2)
>
>
> and, in my script, parse.py py I do:
>
> from regex import *
>
> text = "bunch of stuff......."
>
> m = rgx1.search(text)
>
>
> Does the re get compiled when I import it, or every time I call it?
> Since I'm calling it often, I'd like to compile it once.
>
> Thanks!
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Please correct me if I am wrong ...
but I believe this should work, and rgx's will only be compiled on the first
import. You could also place them in a class and get the same effect when
you instantiate the class.

class MyRegEx( object ):
    re1 = "..
    re2 = "..
    rgx1 = re.compile(re1)
    rgx2 = re.compile(re2)
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From ivan.illarionov at gmail.com  Wed May 14 02:01:02 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 23:01:02 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <8bf1efe4-4165-4cee-ae77-cd25a6f36c1e@w7g2000hsa.googlegroups.com>

On 13 ???, 21:10, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Hi, Rajarshi,

Besides the above comments, I want to highlight Django and other
Python web frameworks and their ability to build simple dynamic web
sites extremely fast.
http://www.djangoproject.com/

-- Ivan


From fiacre.patrick at gmail.com  Fri May 23 01:26:30 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:26:30 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <48365587$0$11637$607ed4bc@cv.net>

cm_gui wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
> 
> I've yet to see a web application written in Python which is really
> fast.

So --- don't use Google

* shrug *


Personally I find PHP to be a hideous language -- it has only one use. 
It is Perl for people who can be bothered to learn a general purpose 
programming language and just write web applications.

Python is a general purpose programming language ... it does web nicely 
(Django and pylons!), it supports real OOP and OOD, it's extensible, it 
has a smart set of libraries, intelligent and coherent interfaces, it 
sails across platforms, it has at least one great ORM (SQLAlchemy) and I 
keep discovering new cool things about the language as a recent convert 
that make me wonder why I would ever write another large application in 
Perl or Java.


I find Zope to be a mess and it gives me a headache ... but it Zope is 
an *application framework*, not a *programming language*.  So, I think 
you are barking up the wrong straw man (if I may mix metaphors).

But that's just my $0.02.


From saluk64007 at gmail.com  Mon May 26 01:40:33 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 22:40:33 -0700
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <c3f69bf60805252240y49b4167t2784e22339df9011@mail.gmail.com>

Here is a quick, ugly way you can easily hide data, although persistent
clients can still bypass it.  x.__dict__ is ugly, though not any uglier than
x.__Ugly__Internal__Variable__Do__Not__Set

Another option would be to use another structure, such as a dictionary or
list, and store variables in there proxying to it from get/set functions (or
__getattr__ __setattr__).  Or just don't document this.

class HideTest(object):
    def __init__(self):
        self.__dict__["beans"] = 5
    def __setattr__(self,key,val):
        if key == "beans":
            raise Exception("Cannot set this attribute")
        return super(HideTest,self).__setattr__(key,val)

b = HideTest()
print "b.beans is",b.beans
try:
    b.beans = 5
except:
    print "Cannot set"


Also the point of underscore rules have never been to keep clients from
accessing variables.  Read about them in PEP8:
http://www.python.org/dev/peps/pep-0008/

They are primarily to handle specific name conflict situations, and
secondarily to inform users when they might be mucking about with something
at a lower level.  Using a keyword could work I suppose for the module-level
convention, as well as for the name mangling.  Implementation wise it seems
a bit tricky to use keywords for this.  For the purposes of informing users
however, keywords versus underscore is a terrible idea.  dir() as is makes
it clear, with underscores, which variables are safe to use and which are
potentially dangerous.  Rewriting dir() to print extra information about
names seems incredibly problematic as well.  I really like the idea of
having variables that may be unsafe to use but I can still use them if I
want to, and the underscore rules are the most clean way I can see for this
purpose (not to mention all of the history).  I agree that they do look ugly
of course.  I also tend not to use them in my code as well.

This has been brought up so many times before, and turned down again and
again.  Working around it as best you can is your best bet, especially since
a major change like this could never happen until well after python 3.0.
(Who knows how long it will take before 3.0 is fully adopted enough to move
on from that)
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From s0suk3 at gmail.com  Sun May  4 07:18:22 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sun, 4 May 2008 04:18:22 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
Message-ID: <e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>

On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
> I had previously ran the import line. I prepended it to the example
> code I'm trying to run every time but it did not help, still nothing
> happens. With or without var before 'root'. I'm pasting the code in
> IDLE and using Windows XP as written in the first post.
>

Tkinter doesn't work if you type the statements in IDLE. I don't
remember the specifics of it, but essentially it doesn't work because
IDLE is itself a Tkinter app. You have to type it at the Python
command line or save it in a file. BTW, if you're on Windows, you
should definitely check wxPython. I used to work with Tkinter,
struggling with it all the time only to get a lame result most of the
time. Then I switched to wxPython, and in the same week I was learning
it I did a better GUI than I ever did in Tkinter (with months of
work!). I feel it makes it easier to make your program have a better
structure and design, and thus lets you focus on the actual task of
the program, rather than in the GUI itself. Plus, on Windows, you'll
get the widgets to look more natively, like any good quality
application there is on Windows.


From timr at probo.com  Wed May 14 02:17:56 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 14 May 2008 06:17:56 GMT
Subject: Fill memeory with endless loop?
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
Message-ID: <go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>

globalrev <skanemupp at yahoo.se> wrote:
>
>and when the program get skiled because out of memory all this will be
>deleted from the memory?

Yes.  When a process is killed, all of the memory it was using is released.

>so there is no way that you can, by accident, fill your whole
>harddrive and make it unusable?

Of course not.  Where do you see a connection between memory and your hard
drive?

Now, you can certainly fill your hard drive by running your little infinite
loop application and storing the results in a file:
    python looper.py > saveme.txt
but I hope it is clear to you that this can't damage any of the data you
already have.

>and RAM-memory always get cleaned out when not used i guess?

It gets released so that it can be re-used.  I don't know what you mean by
"cleaned out".  Remember that most of the systems where Python runs are
virtual memory systems, so even if one application is using a couple of
gigabytes of memory, other applications are still able to run.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py2 at yahoo.com.ar  Fri May  9 02:24:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:24:06 -0300
Subject: Python script freezed on Window DOS terminal
References: <95455e980805082142w7891868fy89da4c0be6659246@mail.gmail.com>
Message-ID: <op.uaviqgc8x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:42:21 -0300, hce <webmail.hce at gmail.com> escribi?:

> I am running Python and a script on XP DOS terminal, the script
> build.py printed out messages on the Terminal, then asked for an input
> of numbers. But, I pressed a key, nothing came in DOS terminal,
> Eventually, no key active and seem the DOS terminal is freezed. I
> could not even terminate the terminal by Ctrl-C or Ctrl-D. The same
> script was running fine on linux or Cygwin terminals. Any thoughts
> what was the problem?

Next time try with Ctrl-Break.
It's hard to say what's wrong without seeing the script.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Sat May  3 16:57:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 21:57:29 +0100
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <m2r6cjksw6.fsf@googlemail.com>

dave <squareswallower at y1a2hoo3.com> writes:

> Hello,
>
> here is a piece of code I wrote to check the frequency of values and
> switch them around to keys in a new dictionary.  Just to measure how
> many times a certain key occurs:
>
> def invert(d):
> 	inv = {}
> 	for key in d:
> 		val = d[key]
> 		if val not in inv:
> 			inv.setdefault(val, [key])
You can simply write:
                        inv[val] = [key]
> 		else:
> 			inv[val].append(key)
> 	return inv
>
>
> Using the methods above (I'm just a beginner) could I have written it
> more concisely?  Any criticism/critique in the code would be greatly
> appreciated.

Apart from the unnecessary use of setdefault, it looks good to me.

* You could change if 'val not in inv:' to 'if val in inv:' (and swap
  the if and else clauses of course) in order to have a positive
  condition rather than a negative one
 
* If you want to use setdefault, you can replace the if .. else
  construct by:

               inv.setdefault(val, []).append(key)

* You can also iterate over keys and values using the items() or
  iteritems() method of dictionaries:

def invert(d):
    inv = {}
    for key, val in d.iteritems():
        inv.setdefault(val, []).append(key)
    return inv

-- 
Arnaud


From torriem at gmail.com  Thu May  1 12:52:33 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 01 May 2008 10:52:33 -0600
Subject: Zope/DTML Infuriating...
In-Reply-To: <4819F4A5.4010302@gmail.com>
References: <ee8a2346-e80c-47c8-96d7-0da227fdf812@a23g2000hsc.googlegroups.com>	<mailman.321.1209477642.12834.python-list@python.org>
	<65492d56-de86-4979-a886-b4e6f9b3b42f@2g2000hsn.googlegroups.com>
	<4819F4A5.4010302@gmail.com>
Message-ID: <4819F551.4080501@gmail.com>

Michael Torrie wrote:
> The second example, x = Integer.fromString('5') demonstrates a huge
> weakness in Java.  

Ahem.  Javascript.  Sorry.


From phil at freehackers.org  Tue May  6 10:38:06 2008
From: phil at freehackers.org (BlueBird)
Date: Tue, 6 May 2008 07:38:06 -0700 (PDT)
Subject: How to generate binary python?
References: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com> 
	<mailman.627.1210048209.12834.python-list@python.org>
Message-ID: <65aa8695-ec87-44a5-9ee1-e4c58000a66c@m73g2000hsh.googlegroups.com>

On May 6, 6:29 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 05 May 2008 19:43:24 -0300, David Anderson <zerty.da... at gmail.com>
> escribi?:
>
> > Hi, i'm comingo from Java and I'm wanting to know what in Python is the
> > equivalent to the file.class in java, I am producing some apps that ar
> > not
> > open source, so I would like to share only the binaries, Both for Windows
> > and for Linux, Can you suggest me anything?
>
> .class files map roughly to .pyc files
> Note that Python generates and writes .pyc files automatically when you
> import a module, but not for the main script being executed.
> The standard way to generate a binary distribution is using distutils, see
> the Python wiki at <http://wiki.python.org/moin/DistributionUtilities>
>

You can have a look at the following page for a very very short
comparison of the different solutions available today:
http://www.freehackers.org/Packaging_a_python_program


From parag_paul at hotmail.com  Thu May  8 03:30:53 2008
From: parag_paul at hotmail.com (parag_paul at hotmail.com)
Date: Thu, 8 May 2008 00:30:53 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
	<fvsj6s$n87$1@ger.gmane.org>
	<mailman.711.1210178170.12834.python-list@python.org>
Message-ID: <2d7d65f9-9f3e-4ed4-be32-b3c3c21d58a7@b1g2000hsg.googlegroups.com>

On May 7, 9:35?pm, Max Erickson <maxerick... at gmail.com> wrote:
> WolfgangZ <wol... at gmx.net> wrote:
> > parag_p... at hotmail.com schrieb:
> >> hi All,
> >>http://mail.python.org/mailman/listinfo/python-list
>
> > At least I'm living in a free country and nobody forces me to
> > learn python. So I don't fully understand why you HAVE TO learn
> > it. When your problems can be solved in a different programming
> > language than you should be free to use whatever you like. And
> > also why should it be forbidden to create a new programming
> > language? Diversity and competition is usually not bad.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> I imagine that there is some English as a second language getting
> involved and the intent of the question was more like "What is
> python useful for on Windows?", which has pretty much the same
> meaning but is open to a slightly friendlier interpretation(i.e.,
> tell me how I can use python instead of tell me why I should use
> python).
>
> The other question might be more like "I already know VBS, what do I
> gain by learning python?".
>
> (the answers could be "lots of things, including full applications"
> and "among other things, you can use it on other platforms, and you
> might prefer the syntax".)
>
> max

thanks to all,
Can you all forward me some sites where there may examples of work
done on Python and that which I amy bring into some application


From python at rcn.com  Fri May 30 22:16:08 2008
From: python at rcn.com (Raymond Hettinger)
Date: Fri, 30 May 2008 19:16:08 -0700 (PDT)
Subject: How to add function return value
References: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>
Message-ID: <7d89a189-1ce9-46d3-b200-2ad86858fa45@h1g2000prh.googlegroups.com>

On May 30, 6:21?pm, HYRY <ruoyu0... at gmail.com> wrote:
> Can I write a decorator that it can automately do this conversion
>
> def func1()
> ? ? a = 1
>
> --->
>
> def func1():
> ? ? a = 1
> ? ? return locals()

Not sure why you would want to do this, but there are several ways.

1. Make bytecode hack decorator that transforms the final "return
None" into "return locals()".  A recipe that shows the basic technique
is at: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277940

2. Retrieve the source using inspect.getsourcelines(f). Then, append a
"return locals()" to the end of the function and run it through exec.

3. Try hacking a tracing/debugging utility.

4. Run the sourcefile through tokenize, make the appropriate
insertion, and then untokenize.

 . . .

Raymond


From castironpi at gmail.com  Fri May 16 18:57:52 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:57:52 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com> 
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>
Message-ID: <2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>

On May 16, 5:22?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
>
>
>
>
> > globalrev wrote:
> > > i ahve a program that takes certain textsnippets out of one file and
> > > inserts them into another.
>
> > > problem is it jsut overwrites the first riow every time.
>
> > > i want to insert every new piece of text into the next row.
> > > so:
> > > 1. how do i write to a new line every time i write to the file?
>
> > > 2. if i dont want to write to a new line but just want to insert it
> > > after the last token in the file, how do i do then?
>
> > Generally, you can't "insert" anything into a file. ?You can either
> > append to the end of a file, or you can rewrite the whole file. ?It
> > sounds like you probably want to read the file into an array using
> > readlines(). ?Then manipulate that array however you want--appending
> > and inserting--and when you are done, overwrite the file with your
> > array.
>
> > However, you should be aware that as soon as you open a file for
> > writing all the data is erased, and if your program should happen to
> > crash right then, the array containing the data will disappear into
> > the ether and your file will be empty--in other words all your data
> > will be gone. ?To prevent such an occurence, you should write your
> > final data to another file, then delete the original file, and finally
> > change the other file's name to the original file name.
>
> Some options:
>
> 1. ?Limit line length. ?Then offset is ( line* length ).
> 2. ?Name your relation.
> 3. ?Hijack the operating system. ?Remember:
>
> abc
> def
>
> on disk looks like
> abc\ndef
>
> where
>
> abcd
> def
>
> looks like
> abcd\ndef
>
> So, if you want line 2, you have to scan line 1.- Hide quoted text -
>
> - Show quoted text -

You also have

f.seek( X )
f.write( 'abc' )

which writes 'abc' in the middle, at offset X.

f.seek( 0, SEEK_END )

takes you to the back, and don't forget

f.flush( ).

Say you have:

File:

abc
def
ghi

Symbols:

0-3
1-3
2-3

abcdefghi

and you want to make abc abC.  Then

f.seek( 2 )
f.write( 'C' )

does work.

If you want to make abc ab, then you change a different file

table.seek( 0 )
table.write( chr( 2 ) )

( or bytes( [ 2 ] ) in 3.0 ).

If you want to make abc abcd, then you change both.

f.seek( 9 )
f.write( 'd' )

table.seek( 0 )
table.write( chr( 4 ) )

But.  Now you have item 0 in two places.  'abc' somewhere and 'd'
somewhere else, at 0 and at 9 respectively.  I think the file system
overallocates room for String 1.  You would read:

0- 2- [ 3, 1 ]

for 'abc'+'d'

and

1- 1- [ 3 ]
2- 1- [ 3 ]

for 'def' and 'ghi', where actual representations would be:

0- 2- [ 0/3, 9/1, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]

As your chains start to grow, leave table 8xN, and just copy strings
to new sectors when they become long:

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]

You can insort in linear time when you're looking for available slots.

'jklm' can't fit at 0.

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]

but 'nop' can.

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
4- 1- [ 0/3, 0, 0, 0, 0, 0, 0, 0 ]

'jklm' could've with a split:

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]

and with 'nop':

0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
4- 1- [ 14/3, 0, 0, 0, 0, 0, 0, 0 ]

There's an easy chance you can beat DbfilenameShelf for your
application.


From alefnula at gmail.com  Fri May  9 08:25:57 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 05:25:57 -0700 (PDT)
Subject: Function creation (what happened?)
Message-ID: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>

Can somebody give me an explanation what happened here (or point me to
some docs)?

Code:

HMMM = None

def w(fn):
    print 'fn:', id(fn)
    HMMM = fn
    print 'HMMM:', id(HMMM)
    def wrapper(*v, **kw):
        fn(*v, **kw)
    wrapper.i = fn
    print 'wrapper:', id(wrapper)
    return wrapper

class A:
    @w
    def __init__(self): pass

print 'A.__init__:', id(A.__init__)
print 'A.__init__.i:', id(A.__init__.i)
print 'HMMM:', id(HMMM)



Output:

fn: 10404208
HMMM: 10404208
wrapper: 10404272
A.__init__: 10376136
A.__init__.i: 10404208
HMMM: 505264624



Why did HMMM changed his id?!


From gherron at islandtraining.com  Fri May 23 02:57:56 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 22 May 2008 23:57:56 -0700
Subject: Calling class method by name passed in variable
In-Reply-To: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
Message-ID: <48366AF4.7030106@islandtraining.com>

Sagari wrote:
> Greetings,
>
> Can someone suggest an efficient way of calling method whose name is
> passed in a variable?
>
> Given something like:
>
> class X:
> #...
>   def a(self):
> # ...
>
>   def b(self):
> # ...
>
> #...
>
> x = X()
> #...
> v = 'a'
>
> How do I call the method of x  whose name is stored in v?
>   

Use getattr (stands for get attribute) to do this.

    fn = getattr(x, v)  # Get the method named by v
    fn(...)    # Call it

Or in one line:

    getattr(x,v)(...)


Gary Herron


> PHP code for this would be:
>
> class X {
>   function a() {
>   }
> }
>
> $x = new X();
> $v = 'a';
> $x->$v();
>
> I need a solution for Python. Could you suggest anything?
>
> The task it to call a function whose name is taken from user-supplied
> input.
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From notbob at nothome.com  Thu May  8 13:30:34 2008
From: notbob at nothome.com (notbob)
Date: Thu, 08 May 2008 17:30:34 GMT
Subject: How to kill Python interpreter from the command line?
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <_MGUj.53425$kl6.21975@fe103.usenetserver.com>

On 2008-05-08, spectrumdt at gmail.com <spectrumdt at gmail.com> wrote:

> I am running Fedora Linux and KDE, using the Konsole command line.

I also run python from Konsole.  

> When coding Python, I regularly make a bug causing my program to not
> terminate. But how do I kill the non-terminating Python interpreter
> without killing the entire Konsole?

Are you refering to the python editor?  If so, try cntrl-d.

> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python. Neither do the "terminate
> task", "suspend task" or "interrupt task" commands (available from
> right-click in Konsole).

If you want to completely kill python, open another Konsole session and kill
it from there.  There are several ways.  The simplist is:

killall python

....which will kill python without killing the Konsole session.

This will find the python pid number and kill it with -15 which cleans
everything up nicely before killing.  If that doesn't work, you may need to
use kill -9, which is kill with extreme prejudice and leaves all the bodies
lying around to crap up the works.  To do that, try:

ps aux | grep python

.....which will give you the pid number and then you plug it into:

kill -9 pid_number

If all that doesn't work, change to Slackware!  ;)

nb


From nick at craig-wood.com  Sat May  3 05:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 04:30:03 -0500
Subject: Help with pyserial and sending binary data?
References: <mailman.481.1209758257.12834.python-list@python.org>
Message-ID: <slrng1oatn.7q6.nick@irishsea.home.craig-wood.com>

Rich <richietommy at yahoo.com> wrote:
>  I am working on a python library for sending and receiving data
>  from a Subaru's ECU (the fuel injection computer) via the OBD-II
>  port and an OBD to USB cable, with the Subaru Select Monitor
>  protocol.
[snip]
>  So I've been messing with it, and in as few lines as possible, this
>  should in theory, send the init command to the ECU (0x80 0x10 0xF0
>  0x01 0xBF 0x40), and the ECU should return its ID to let you know
>  that you can now chat (something like 0x80 0xF0 0x10 0x39 0xFF 0xA2
>  0x10 0x0F 0x1B 0x14 0x40 0x05 0x05 0x73 0xFA 0xEB ......):

> 
>  #--------------------------
>  import serial, string
>  output = " "
>  ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
>  ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
>  while output != "":
>     output = ser.read()
>     print hex(ord(output))
>  #--------------------------

The code looks OK.

With a constructor which takes as many arguments as Serial does I tend
to name them to avoid mistakes, eg

serial.Serial("/dev/ttyUSB0", baudrate=4800, bytesize=8, parity='N', stopbits=1, timeout=1)

8N1 is documented as the default so you could then reduce it to the
following if you wanted

serial.Serial("/dev/ttyUSB0", baudrate=4800, timeout=1)

>  The only problem is that when I send the ECU init command, it just
>  echos back the data I sent it, which, from my understanding, means
>  that I sent an invalid request packet.

My experience with these sort of protocols is that if you make a
packet error (wrong address, wrong checksum, wrong start byte) you'll
get no reply at all.

If you make a command error (use a command that isn't understood in a
valid packet) you'll get a properly formatted reply with an error
message in.  This should start 0x80 0xF0 0x10 .... (from and to
reversed).

I'd suspect that if you are just receiving the data back then you have
got your serial cable wrong and have somehow looped tx and rx.  Did
you try your cable with the other programs?  Or possibly you are using
the wrong serial port - are you sure you haven't any other USB
serials?  ls /dev/ttyUSB* on a udev system will show you.  lsusb (as
root) is useful as is dmesg immediately after plugging the port in.

I do a lot of this sort of thing at work (not with cars though with
satellite equipment) and it is always the first packet and the first
response which is the hard part.  After that it is usually plain
sailing!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mnikhil at gmail.com  Wed May 14 14:52:35 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:22:35 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <482B34F3.20705@gmail.com>

Arnaud Delobelle wrote:
> Nikhil <mnikhil at gmail.com> writes:
> 
>> Hi,
>>
>> I am reading a file with readlines method of the filepointer object
>> returned by the open function. Along with reading the lines, I also
>> need to know which line number of the file is read in the loop
>> everytime.
>> I am sure, the line should have the property/attribute which will say
>> the line number of the file.
>>
>> If there is none, do I have to end up using the counter in the loop?
>>
>> fp = open("file", "r")
>> lineno = 0
>> for line in fp.readlines():
>> 	print "line number: " + lineno + ": " + line.rstrip()
>>         lineno = lineno + 1
> 
> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 
Oh I did not know enumerate can be used. Thanks Paul and Arnaud.
I will try this.


From bronger at physik.rwth-aachen.de  Wed May 21 12:59:34 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 21 May 2008 18:59:34 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
Message-ID: <87ej7voao9.fsf@physik.rwth-aachen.de>

Hall?chen!

Daniel Fetchinson writes:

>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>>
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>>
>> Arf ! A goto !
>
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?

In the hands of a skilled person who really knows what he/she does,
it can be a useful statement.  But this collides with the goals of
FT, which claims to be simple to use.  Besides, the above use case
for a goto is definitively awful.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From deets at nospam.web.de  Sun May  4 18:12:13 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 00:12:13 +0200
Subject: Can I install Python 2.4 and 2.5 ?
In-Reply-To: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
References: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
Message-ID: <686qm2F2ri0t9U1@mid.uni-berlin.de>

adolfo schrieb:
> I am reviewing various visualization programs (Scipy, PYGNL, etc) and
> IDE?s. Some run on Python 2.4 others in 2.5.
> 
> Can I have both installed at the same time if I don?t run them
> concurrently?
> 
> Now in Windows XP soon on Ubuntu 8
> 
> Appreciating your help,

Yes you can. However you need to install 3rd-party-modules separately 
for each version - e.g. scipy - if you want to use them with both.

Diez


From mensanator at aol.com  Thu May  8 13:24:40 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 8 May 2008 10:24:40 -0700 (PDT)
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>

On May 8, 2:06?am, v4vijayakumar <vijayakumar.subbu... at gmail.com>
wrote:
> When I started coding in python, these two things surprised me.
>
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

You must type inconsistently.

I never had such a problem even when I used to use Notepad.

>
> 2. python requires to pass "self" to all instance methods

Who uses methods?

>
> and I missed ":" often. :)

Try using something like Seed7, where you have to use "then" with
"if" and "do" with "while" and "end" in every block. Maybe you'll
come to appreciate significant whitespace and ":".


From thorsten at thorstenkampe.de  Tue May 20 14:31:13 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Tue, 20 May 2008 20:31:13 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
	<0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>
Message-ID: <MPG.229d3757e185e12e98975f@news.individual.de>

* ZeeGeek (Tue, 20 May 2008 09:31:27 -0700 (PDT))
> On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> > > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> > > > > Hi, what's the default localedir for gettext module on windows? In
> > > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > > order to make the translation work?
> >
> > > > %PYTHONHOME%\share\locale
> >
> > > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > > use:
> >
> > > import gettext
> > > gettext.install('testprogram', unicode = True)
> >
> > The syntax is correct. Is the test program localised under Linux or
> > Cygwin? If not then the error is somewhere in your application.
> 
> Yes, it's localized under linux.
> 
> > How did you try to set the language on Windows? It works for me on Vista
> > with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> > be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> > correctly).
> 
> I'm using Simplified Chinese Windows, so I didn't set anything
> specifically before firing up the program. I found that if I use
> gettext.GNUTranslations to read in the .mo file, then it's localized.
> But gettext.install doesn't work.

Well, then why don't you set the environment variable for testing!?

T.


From pataphor at gmail.com  Thu May 22 08:58:41 2008
From: pataphor at gmail.com (pataphor)
Date: Thu, 22 May 2008 14:58:41 +0200
Subject: "indexed properties"...
References: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
	<20080521124744.17546846@outerspace>
	<7sla341agcpd1729k5pa0e0hern05qtv22@4ax.com>
Message-ID: <20080522145841.7c9e8133@hyperspace>

On Thu, 22 May 2008 06:26:41 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> On Wed, 21 May 2008 12:47:44 +0200, pataphor <pataphor at gmail.com>
> wrote:
> >Using the trick of encapsulating the values inside single-element
> >lists one can make a transposition of the matrix and get
> >synchronicity for the little price of doubling the number of
> >instances. Since the views share the data this is a lot less
> >expensive than one would think. One can use the row view or the
> >column view to alter data and the changes will automatically be
> >visible in the other view, since the views update the same lists. 
> 
> Oh - that's different. This is not what I thought you had in mind
> (it's not what I had in mind in the thing I called a joke.)

The idea has two parts, the first part is to create two views and the
second part is to somehow synchronize the data. To make both views
update the same data is just not a very lazy synchronization
procedure. 

Does it even have to be a list? Let's see ...

No, this works as well:

class Shared(object):
    
    def __init__(self,value=None):
        self.value = value

class Storage(ListMixin):

  def __init__(self, seq=[]):
    self.L = map(Shared,seq)

  def _constructor(self, iterable):
    return Storage(iterable)

  def __len__(self):
    return len(self.L)

  def _get_element(self, i):
    assert 0 <= i < len(self)
    return self.L[i].value

  def _set_element(self, i, x):
    assert 0 <= i < len(self)
    self.L[i].value = x

  def _resize_region(self, start, end, new_size):
    assert 0 <= start <= len(self)
    assert 0 <= end   <= len(self)
    assert start <= end
    self.L[start:end] = [Shared() for i in range(new_size)]
 
> >  def _constructor(self, iterable):
> >    return Storage(iterable)
> 
> Probably I'm just being dense. Why does
> _constructor exist? (Oh - looking at things
> below, I imagine it's something to do with
> ListMixin.)

I just filled in the example class. It was very handy, one can make
changes very quickly because all the functionality is in a few lines of
code.

P.



From jcd at sdf.lonestar.org  Thu May 22 14:30:06 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 22 May 2008 14:30:06 -0400
Subject: import X vs from x import *
In-Reply-To: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <1211481006.12177.7.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-22 at 10:44 -0700, notnorwegian at yahoo.se wrote:
> import Tkinter
> from Tkinter import *
> 
> i have a program where if i comment out either of those import-
> statements i get an error.
> 
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Others have explained what one statement does as opposed to the other.

In general, you do not want to use from x import *.  Your namespace gets
polluted with all sorts of variables, and you don't know if you're going
to overwrite something important.  It's much better to specify which
names you want to import (for the sake of those reading your code later,
and for the sake of future-proofing your code against new variables
finding their way into the module being imported from), or just to
import the package (and optionally assign it to a shorter alias)

import Tkinter as tk

tk.function()

That said, there are occasional packages where it is common practice to
import *.  Tkinter might be one of those.  I don't have any experience
with it.  But don't make a habit of it. :)

Cheers,
Cliff




From fuzzyman at gmail.com  Sun May 18 17:25:38 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 18 May 2008 14:25:38 -0700 (PDT)
Subject: about python
References: <mailman.31.1208919375.12834.python-list@python.org>
Message-ID: <d23c17bd-fc58-44c4-9162-f0e57ea80367@m36g2000hse.googlegroups.com>

On Apr 23, 3:50?am, mran... at varshyl.com wrote:
> How can python execute in browser?
>
> Mukul

The best way of running Python code in the browser is with the
Silverlight browser plugin. Silverlight 2 (currently working with IE,
Safari and Firefoxon Windows and Mac OS X - but Silveright 2 for
Linux, called Moonlight, made major steps in the last few days).

You can run IronPython code inside Silverlight, with the choice of the
WPF based user interface or interacting with the browser DOM and
Javascript.

See the following for more details:

    http://www.voidspace.org.uk/ironpython/silverlight/

Michael Foord
http://www.ironpythoninaction.com/


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:12:19 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:12:19 -0300
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
	<a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com>
Message-ID: <op.ubg3yti5x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 16:22:10 -0300, Joe P. Cool  
<joe.p.cool at googlemail.com> escribi?:
> Ludwig Miniatur wrote:
>> For example:
>> #!/usr/bin/env python
>>
>> from parser import suite, ast2list
>> fh = file(__file__)
>> s = fh.read()
>> fh.close()
>> ast = suite(s)
>>
>> while False:
>>   print "hello world"
>> # comment
>>
>> Looks like a little bug in parser; but what I don't understand is that
>> I thought parser was build with the current syntax of python.
>
> I didn't read the grammar but I assume that Python grammar requires a
> comment to have the form #.*<end-of-line>.
>>
>> So, why can python run the script (an it can if you comment out the
>> line "ast = suite(s)") but parser can't?
>
> The interpreter probably appends a newline after the input stream as a
> friendly service :)

Something like that. The last line of source *must* end in a newline (be  
it a comment or not); this is a known limitation. See py_compile.py for an  
example.

-- 
Gabriel Genellina



From mensanator at aol.com  Fri May 30 11:41:16 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 08:41:16 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org> 
	<g1p50c$97h$1@news.lrz-muenchen.de>
Message-ID: <45f694b7-8c2c-4548-b6e8-42a12e96e0d4@d77g2000hsb.googlegroups.com>

On May 30, 10:03?am, Philipp Pagel <pDOTpa... at helmholtz-muenchen.de>
wrote:
> Skonieczny, Chris <Skonieczn... at emssatcom.com> wrote:
> > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> >http://mail.python.org/pipermail/python-list/2007-February/427841.html?
>
> > It is not true - eg. try :
> > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > b=int(a)
> > and what you will get ? An error !!!
>
> 'P' is obviously not an ASCII representation of a number.

It is in base 36.

>>> a='P'
>>> b=int(a,36)
>>> b
25


> What did you expect? The closest number by visual appearance?
>
> cu
> ? ? ? ? Philipp
>
> --
> Dr. Philipp Pagel
> Lehrstuhl f. Genomorientierte Bioinformatik
> Technische Universit?t M?nchenhttp://mips.gsf.de/staff/pagel



From upton at virginia.edu  Wed May 21 19:30:27 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 19:30:27 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
	<be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>
Message-ID: <5504f9ac0805211630i1475aa16i340394ffd5c7f700@mail.gmail.com>

On Wed, May 21, 2008 at 5:27 PM, Fuzzyman <fuzzyman at gmail.com> wrote:
> On May 14, 10:30 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> > Dave Parker schrieb:
>> > > All of the calculators and textbooks that elementary school students
>> > > use, use "^" for powers.
>>
>> I've never seen this symbol in textbooks. In textbooks, powers are
>> written using superscript.
>>
>> >>  Just like Flaming Thunder does.  I haven't
>> > > seen "**" for powers since FORTRAN.
>>
>> I haven't seen any language using '^' as the power operator so far -
>> but I've seen quite a lot of them using it as the bitwise XOR operator.
>
>
> Excel uses the caret as the power operator. Arguably the worlds most
> widely used programming environment...
>
I think BASIC did, too.  I know I used to use it in some language and
was confused when I first tried to use it in Java and didn't get what
I was expecting.  ("Some language" must be in the set (BASIC, C,
Logo).)


From alex.m.gusarov at gmail.com  Thu May 29 03:50:19 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:50:19 +0700
Subject: Struct usages in Python
In-Reply-To: <ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
	<e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
	<ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>
Message-ID: <ac6dcb3d0805290050u4d1c151ft34a60984d6c8df04@mail.gmail.com>

> Yes. That is the somewhat unfortunate difference between new-style and old-style classes.
> Use new-style if you can, and that means that "object" must be part of the inheritance graph.

...

>    You are wrong for Python 2.X, but right for Python 3 where old-style
>
>    classes are gone for good.

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov


From kyosohma at gmail.com  Tue May 27 10:05:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 07:05:32 -0700 (PDT)
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
Message-ID: <dfe98ed6-e7c9-4797-87b3-bd55f5806140@r66g2000hsg.googlegroups.com>

On May 27, 3:54?am, Giraffe <kerstin.vilters... at semcon.com> wrote:
> I have the followong class in a file:
> --------------------------------------------
> class someClass:
> ? ?def __init__ (self):
> ? ? ? self.someVar = 10
>
> ? ?def getSomeVar (self):
> ? ? ? return self.someVar
> --------------------------------------------
>
> In another file a do the following:
> --------------------------------------------
> tmp = someClass ()
> tmp.getSomeVar ()
> --------------------------------------------
>
> I run the second file in the IDLE environment and everything seems to
> be working fine until I start to modify in the first file:
> --------------------------------------------
> class someClass:
> ? ?def __init__ (self):
> ? ? ? self.someVar = 10
>
> ? ?def getSomeVar (self):
> ? ? ? print "Modified class!"
> ? ? ? return self.someVar
> -------------------------------------------
>
> When I now try to run the second file in the IDLE environment again, I
> DO NOT get the newly added printout. I have saved and compiled (run)
> both files but there is still no change. What have I missed?


You might also look into the reload(module) function, documented here:

http://docs.python.org/lib/built-in-funcs.html

It's made for that sort of thing.

Mike


From stanc at al.com.au  Fri May  2 05:40:15 2008
From: stanc at al.com.au (Astan Chee)
Date: Fri, 02 May 2008 19:40:15 +1000
Subject: get number that is raised to the power of
In-Reply-To: <97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>
References: <481ADC8B.20000@al.com.au>
	<97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>
Message-ID: <481AE17F.7070503@al.com.au>



Python.Arno wrote:
> the "reverse" of a power to is logarithm
> so v = 10**n  <=>  math.log(v,10) = n
>
> Arno
>
Im so ashamed of myself for not thinking in logs.
I must be dreaming again.
Thanks for the help.

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From arnodel at googlemail.com  Thu May 15 07:09:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 04:09:53 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
Message-ID: <10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>



bruno.desthuilliers at gmail.com wrote:
> On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
> > "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> > >> __new__ is a static method!
> >
> > > __new__ is a special-cased staticmethod that  1/ must not be declared
> > > as such and 2/ takes the class object as first args. As far as I'm
> > > concerned, it's semantically a classmethod.
> >
> > It's a static method!
>

OK then let me reply pedantically:

> Sorry Arnaud, I probably didn't made it clear enough : I do know it is
> a staticmethod object. What I say is that
> 1/ it's special-cased since you don't *explicitely* declare it as a
> staticmethod

In some cases you have to:

class Foo(object): pass

# Later on I want to redefine Foo.__new__

@staticmethod
def Foo__new__(cls):
    print "new Foo!"
    return object.__new__(cls)

Foo.__new__ = Foo__new__

>>> Foo()
New Foo!
>>> # Without the @staticmethod we would get a TypeError

> 2/ it behaves just like a classmethod, since it takes the class as
> first argument.

When you invoke it implicitely maybe, but not when you do so
explicitely! Look at my example below:  to create my Foo object, I
have to write

    object.__new__(Foo)

> IOW, I'm talking about semantic, not implementation.

I understand what you mean, and from that point of view you can argue
against my example above (after all, my example is code, not pure
concept) but for me it is simpler to think of __new__ as a
staticmethod (which it is!), plain and simple.

--
Arnaud


From Russ.Paielli at gmail.com  Mon May 26 23:10:29 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Mon, 26 May 2008 20:10:29 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
	<mailman.1629.1211844239.12834.python-list@python.org>
Message-ID: <03655ec7-2136-4cea-9575-34e321356439@p25g2000pri.googlegroups.com>

On May 26, 4:23 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:

> To make things clear: _variables ARE visible when you import a module:
>
> C:\TEMP>type module.py
> _variable = 123
>
> (invoke python)
> py> import module
> py> module._variable
> 123
> py> dir(module)
> ['__builtins__', '__doc__', '__file__', '__name__', '_variable']
> py>
> py> from module import _variable
> py> _variable
> 123
>
> Only when you use "from module import *" _variable isn't imported.
> (new python session):
>
> py> from module import *
> py> _variable
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> NameError: name '_variable' is not defined

Hmmm... that seems a bit strange. Why should "_variable" be visible
when you use "import module" but not when you use "from module import
*"?

> That last form should not be used normally, except when playing with the
> interactive interpreter.

OK, I have a confession to make. I use "from module import *" almost
exclusively. But then, I'm different from most folks. I can drink six
beers and still drive safely, for example. The key is to drive faster
so I can get past dangerous situations quicker.




From max at alcyone.com  Sat May  3 17:31:33 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:31:33 -0700
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <87fxszrscz.fsf@physik.rwth-aachen.de>
References: <fvi54o$26lb$1@toralf.uib.no>
	<m2zlr7l20r.fsf@googlemail.com>	<481CB283.107@gmail.com>	<8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>
	<87fxszrscz.fsf@physik.rwth-aachen.de>
Message-ID: <AoadnWucdeAlRIHVnZ2dnUVZ_qPinZ2d@speakeasy.net>

Torsten Bronger wrote:

> No, the above expression should yield ''+'abc'+'efg', look for the
> signature of sum in the docs.

You're absolutely right, I misread it.  Sorry about that.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From deets at nospam.web.de  Sun May 25 07:40:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:40:47 +0200
Subject: Python, Daemons and D-Bus
In-Reply-To: <24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
	<g19rcb$pjt$02$1@news.t-online.com>
	<24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>
Message-ID: <69t1i1F33b3ncU1@mid.uni-berlin.de>

PurpleServerMonkey schrieb:
> On May 25, 5:46 am, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
>> [ PurpleServerMonkey <PurpleServerMon... at gmail.com> ]
>>
>>> Would you use D-Bus or a more traditional IPC method such as sockets?
>>> Although D-Bus is relatively new it looks interesting, just not sure
>>> it would work well in this kind of project.
>> DBus is not really intended for private communication between processes of
>> the same application, but more for intercommunication between different
>> applications.  If the IPC interface of your backend daemons is intended to
>> be used by other applications, DBus is the right choice, otherwise I would
>> choose something different.
>>
>> The reason is, that DBus doesn't know about applications.  It exposes all
>> objects registered on the bus to every DBus client on the system and so
>> makes you application-private API available to the public (and spams the
>> bus with lots of generally useless objects ;) ).
>>
>> In case your IPC interface is application private, a custom IPC protocol
>> (probably using XML RPC over unix sockets) is better suited.
>>
>> Moreover you should make your choice dependent on the type of data you
>> transmit.  Both DBus and XML-RPC wrap calls into XML messages, which is
>> terribly inefficient for large binary data.
>>
>> --
>> Freedom is always the freedom of dissenters.
>>                                       (Rosa Luxemburg)
> 
> Thanks Sebastian,
> 
> Your comments make a lot of sense. I was thinking of creating a custom
> session channel and using that for my purposes but as you mentioned
> it's not very secure and I do want to keep the server to daemon
> traffic private, the server has an XML-RPC interface with a public
> API.
> 
> Will definitely look at using a different IPC mechanism for this part
> of the project.

If you can - use Pyro. It is easy, fast and can be made secure using SSL 
AFAIK.

Diez


From afilash+python at gmail.com  Wed May 21 12:54:55 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Wed, 21 May 2008 22:24:55 +0530
Subject: can someone with guessing a number
In-Reply-To: <005101c8bb61$b78fb710$1300a8c0@Home>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
Message-ID: <9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>

    if tries > 10:
        print 'you failed- give up'


On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:

>  I would just like the program to exit after guessing the amount of
> numbers wrong
>
> # Guess My Number
> import random
> the_number = random.randrange(100) + 1
> tries = 1
> # guessing loop
> while (guess != the_number):
>     if (guess > the_number):
>         print "Lower..."
>     else:
>         print "Higher..."
>
>     guess = int(raw_input("Take a guess: "))
>     tries += 1
>     if tries > 10:
>         print 'you failed- give up'
>
> print "You guessed it!  The number was", the_number
> print "And it only took you", tries, "tries!\n"
>
> raw_input("\n\nPress the enter key to exit.")
>
> many Thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From ppr.vitaly at gmail.com  Thu May 29 06:14:07 2008
From: ppr.vitaly at gmail.com (Vitaliy)
Date: Thu, 29 May 2008 03:14:07 -0700 (PDT)
Subject: Error: Cannot convert Decimal("0.0000") to Decimal
Message-ID: <32b8c8c0-e567-477f-9495-56e38ec2b2c1@e53g2000hsa.googlegroups.com>

Hi

I got this wired exception periodically (Python 2.5, Django based
application)
what does it mean ?


From aisaac at american.edu  Thu May 29 16:26:15 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 29 May 2008 20:26:15 GMT
Subject: should I put old or new style classes in my book?
In-Reply-To: <m2d4n43oxc.fsf@googlemail.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com>
Message-ID: <HjE%j.14125$ED6.6685@trnddc02>

This thread raises two questions for me.



1. I take it from this thread that in Python 3 the

following are equivalent:



        class Test: pass



        class Test(object): pass



Is that correct, and if so, where is it stated explicitly?

(I know about the "all classes are new style classes" statement.)



2. I take it from this thread that in Python 2.2+

   if I put the following at the top of a module ::



        __metaclass__ = type



then all the classes defined in that module will be newstyle 

classes.  Is that correct?  Somehow I did not grok that from 

<URL:http://docs.python.org/ref/metaclasses.html>

but it seems right.



Thank you,

Alan Isaac






From mszpadzik at gmail.com  Thu May 29 15:01:30 2008
From: mszpadzik at gmail.com (Mike)
Date: Thu, 29 May 2008 12:01:30 -0700 (PDT)
Subject: Python threads and memory usage
Message-ID: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>

Hi,

I'm writing client-server application in Python. It's monitoring
system, where server listen and waits for TCP connections, and every
connection takes own thread. Every thread puts data from clients to
Queue and exits. Then there is one DB loader thread, which loads all
data from Queue to MySQL DB.

I observed, that every thread reserved some memory, and after exit
thread doesn't freed it. When i leaved my server working for 3 days,
then it takes 15% of 512MB memory (during that time about 15000
threads were created and stopped). When server starts it only takes
about 1% of memory.

I know that I can made client which connects once and keep this
session with server thread all time (it should resolve my problems),
but I'm curious if this is normal or it is something like memory leak.
Or maybe I'm doing something wrong :)

If You need I can paste all my code.

Regards


From arnodel at googlemail.com  Wed May  7 14:21:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:21:12 +0100
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
Message-ID: <m2k5i6561z.fsf@googlemail.com>

"M?ta-MCI (MVP)" <enleverlesX.XmcX at XmclaveauX.com> writes:

> Hi!
>
> print become a function ; OK
>
> I thought: and why the affection (=) would not become, also, a function?
> Examples:
>        a = 123                            return 123
>        b,c = 543.21, "LOL"        return  (543.21, "LOL")

Do you mean a = 3 would become an *expression* ?

For one thing, it wouldn't fit with the Python's function call syntax:

    f(4, x=2)

currently means that f is called with first positional argument equal
to 4 and named argument 'x' equal to 2.

Moreover, it seems to me utterly unpythonic (and I don't often feel
like using this word!).  Binding a name to a new value is something
that needs to be clearly visible in the code flow, not hidden within
an expression

E.g.

    f(3, 4 + (x=2), 5)

has the side-effect that x is now bound to 2, but it is only apparent
if one closely scrutinises the code.

-- 
Arnaud


From marc at stopspam.goldak.ca  Wed May 28 13:28:40 2008
From: marc at stopspam.goldak.ca (Marc Pelletier)
Date: Wed, 28 May 2008 12:28:40 -0500
Subject: graphical ide??
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<mailman.1632.1211848522.12834.python-list@python.org>
Message-ID: <Xns9AAC74C19C11Ammpp1234.dd@216.168.3.44>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in 
news:mailman.1632.1211848522.12834.python-list at python.org:

> I'm unsure if you're looking for a development environment like these:
> http://wiki.python.org/moin/IntegratedDevelopmentEnvironments
> or an interface designer for wxPython (see the bottom part of  
> http://wiki.python.org/moin/GuiProgramming)
> 
> 

Thanks Gabriel and others,

I found these links useful and also followed a trail to something I thought  
was called "Python pit", which was very good, but I can't find it now. Most 
of the tools seem to be for creating and serializing the dialogs to xml or 
other, which will work fine, but unfortunately isn't what the previous 
developer on the project did. So I guess I'll have to continue with it 
manually.

cheers

Marc


From ewertman at gmail.com  Thu May  8 22:04:00 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Thu, 8 May 2008 22:04:00 -0400
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
Message-ID: <92da89760805081904v2927bf73tc28c55415c405a4d@mail.gmail.com>

Something like this.  I'm sure there are other ways to do it.

import re

def addspace(m) :
        return ' ' + m.group(0)

strng = "ModeCommand"

newstr =  re.sub('[A-Z]',addspace,strng)

print newstr.strip()



On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschroed at gmail.com> wrote:
> I have a string (which I got from the names of my classes) and I would like
> to print out my CamelCase classes as titles.
>
> I would like it to do this:
>
>>>> my_class_name = "ModeCommand"
> ## Do some magic here
>>>> my_class_name
> 'Mode Command'
>
> Anyone know any easy way to do this?  Thanks.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From larzluv at hotmail.com  Sun May 11 21:43:18 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:43:18 -0700 (PDT)
Subject: Orlando Florida Python Tutor Needed
References: <7ce42a69-8c6b-435b-a125-2a619b3a8603@k13g2000hse.googlegroups.com>
Message-ID: <ef099531-d38a-4b98-b19a-b7f0ac5a5aae@d1g2000hsg.googlegroups.com>

On May 10, 11:42 am, vbgunz <vbg... at gmail.com> wrote:
> I will pay anyone for a face-to-face tutoring in the Orlando Florida
> area. I will pay $20.00 per hour (minimum 2 hours needed). What I need
> are lessons in Decorators and Class methods. If I can walk away with
> at least 5 lessons taught in both subjects I will be happy to offer an
> additional $20.00.
>
> If you are interested in this offer feel free to either reply through
> email OR here on this thread. There are no string attached, catches,
> etc. I need to learn and if you can teach well, I will be happy to
> learn.
>
> Best Regards
> Victor B. Gonzalez


I know you're looking for "one-on-one" help, direction, and/or
tutelage, but since you've not received an answer (yet), here's some
general info...

---

For Class Methods, perhaps you could mention more of what you need to
know?  Otherwise, generically see:

    http://docs.python.org/tut/node11.html#SECTION0011340000000000000000
    http://www.geocities.com/foetsch/python/new_style_classes.htm
    http://www.diveintopython.org/object_oriented_framework/defining_classes.html

and obviously

    http://www.google.com/search?hl=en&q=python+class+methods&btnG=Google+Search

---

For Decorators, have a gander at:

    http://www.ddj.com/web-development/184406073;jsessionid=QCNTPTSNXZP2WQSNDLPCKHSCJUNN2JVN?_requestid=749134
    http://www.ibm.com/developerworks/linux/library/l-cpdecor.html

and obviously

    http://www.google.com/search?hl=en&q=python+decorators&btnG=Google+Search

Decorators are still rather new to -me-, and I've yet to "need" 'em,
but they _seem_ like a handy feature.  (Personally, I don't care too
much for the syntax, but other than explicitly DOING what they do,
which would be [1] messier and/or [2] non-transparent/duplicative, I
sadly have no alternative thought[s]...  ;) )


Cheers,
-Larry Hale


From Scott.Daniels at Acm.Org  Sun May 18 00:25:06 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 17 May 2008 21:25:06 -0700
Subject: can't delete from a dictionary in a loop
In-Reply-To: <mailman.1253.1210977544.12834.python-list@python.org>
References: <mailman.1246.1210972944.12834.python-list@python.org>	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>	<482DFF63.7020701@islandtraining.com>
	<mailman.1253.1210977544.12834.python-list@python.org>
Message-ID: <yLidnbNdmdUEMLLVnZ2dnUVZ_gOdnZ2d@pdx.net>

Eduardo O. Padoan wrote:
> On Fri, May 16, 2008 at 6:40 PM, Gary Herron <gherron at islandtraining.com> wrote:
>> bruno.desthuilliers at gmail.com wrote:
>>> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>>>
>>>> Dan Upton wrote: 
   <<asking about iterating over a dictionary and deleting elements>>
>>>> ...to solve the immediate problem:
>>>>   for pid in procs_dict.keys():
>> And then, in Python3, keys() produces something else altogether (call a view
>> of the dictionary) which would provoke the same problem, so yet another
>> solution would have to be found then.
> In Python 3.0, list(procs_dict.keys()) would have the same effect.
Or (simpler in either 3.0 or 2.X):
     for pid in list(procs_dict):
         ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From mrkmuthuraman at gmail.com  Tue May  6 21:28:56 2008
From: mrkmuthuraman at gmail.com (fashion girl)
Date: Tue, 6 May 2008 18:28:56 -0700 (PDT)
Subject: The worlds largest FREE jobs and resume database!
Message-ID: <e485b599-3d0a-429a-a47e-69934c68ccfc@m73g2000hsh.googlegroups.com>

The worlds largest FREE jobs and resume database!


 Employers search resumes and post jobs FREE.
 Jobseekers post resumes and search jobs FREE.


http://www.freewebs.com/eeyes/




From paul at boddie.org.uk  Wed May  7 18:52:25 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 15:52:25 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
	<3aoudmza.fsf@gmail.com>
Message-ID: <7e675421-4f06-4f18-a2c7-5d1b083c0fc0@25g2000hsx.googlegroups.com>

On 7 Mai, 19:48, vivai... at gmail.com (Ville M. Vainio) wrote:
> Paul Boddie <p... at boddie.org.uk> writes:
> > original licence as well. Now, I did leave a fair amount of
> > information about the heritage of the code, so that anyone who is
> > scared of the LGPL could just go and get the original work, but that
>
> I doubt anyone is really afraid of LGPL. The only problem with LGPL is
> that of static vs. dynamic linking, and that is only a problem in
> platforms without dynamic linker (rarity these days).

The wxWindows, erm, wxWidgets people seemed to be worried enough to
neuter the licence, making the result a somewhat bizarre creation.

> > You can almost never just "grab the code from somewhere without having
> > to think about [the] license" since even permissive licences typically
> > have a list of conditions that must be observed. Certainly, they
>
> Yeah, but you don't have to "worry" about license - just have the
> license text in source code, or a text file in binary distribution.

Yes, but you are still having to think about the licence: if it were
public domain code (and provably so, opening up another discussion
entirely) then you wouldn't need to think twice about doing whatever
you wanted with the code. I accept that with the GPL, you're obliged
to think about what you're going to need to do with the source, but in
licences like the modified BSD licence, the FreeBSD licence or the X11
licence, that text file in the binary distribution is quite possibly
something that some people might overlook.

There are other things that could trip people up, of course: non-
endorsement clauses, required notices of modifications, patent
retaliation clauses, and so on. All these do feature in permissive
licences.

Paul


From daveparker at flamingthunder.com  Mon May 12 19:39:25 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 16:39:25 -0700 (PDT)
Subject: Python and Flaming Thunder
Message-ID: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>

I've read that one of the design goals of Python was to create an easy-
to-use English-like language.  That's also one of the design goals of
Flaming Thunder at http://www.flamingthunder.com/  , which has proven
easy enough for even elementary school students, even though it is
designed for scientists, mathematicians and engineers.


From needin4mation at gmail.com  Thu May  1 17:25:11 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 14:25:11 -0700 (PDT)
Subject: where do I begin with web programming in python?
Message-ID: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>

I have been to the main python site, but am still confused.  I have
been using .net, so it may be obvious how to do this to everyone
else.  I am aware there are various frameworks (Django, Pylons, etc.),
but I would like to know how to create web pages without these.  If I
have mod_python or fastcgi on apache, where do I start?  I don't have
clue where to begin to create a web page from scratch in python.  I am
sure I will want to access database, etc., all the "normal" stuff, I
just want to do it myself as opposed to the frameworks, for learning.

Thank you for any help.


From matthieu.brucher at gmail.com  Fri May 30 04:33:23 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Fri, 30 May 2008 10:33:23 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <HjE%j.14125$ED6.6685@trnddc02>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
Message-ID: <e76aa17f0805300133k61ba44b7p3adecc5c5d8c42cf@mail.gmail.com>

2008/5/29 Alan Isaac <aisaac at american.edu>:

> This thread raises two questions for me.
>
>
>
> 1. I take it from this thread that in Python 3 the
>
> following are equivalent:
>
>
>
>       class Test: pass
>
>
>
>       class Test(object): pass
>
>
>
> Is that correct, and if so, where is it stated explicitly?
>
> (I know about the "all classes are new style classes" statement.)
>

All classes are new style classes, and the usual

class MyClass(object) pass

should be replaced by the first

class MyClass: pass

IIRC. I don't know ATM where I read it.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From deets at nospam.web.de  Mon May 12 11:29:51 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 17:29:51 +0200
Subject: buffering choking sys.stdin.readlines() ?
In-Reply-To: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
References: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
Message-ID: <68r63qF2s4ksaU1@mid.uni-berlin.de>

cshirky schrieb:
> Newbie question:
> 
> I'm trying to turn a large XML file (~7G compressed) into a YAML file,
> and my program seems to be buffering the input.
> 
> IOtest.py is just
> 
>   import sys
>   for line in sys.stdin.readlines():
>     print line
> 
> but when I run
> 
> $ gzcat bigXMLfile.gz | IOtest.py
> 
> but it hangs then dies.
> 
> The goal of the program is to build a YAML file with print statements,
> rather than building a gigantic nested dictionary, but I am obviously
> doing something wrong in passing input through without buffering. Any
> advice gratefully fielded.

readlines() reads all of the file into the memory. Try using xreadlines, 
the generator-version, instead. And I'm not 100% sure, but I *think* doing

for line in sys.stdin:
    ...

does exactly that.

Diez


From http  Wed May  7 02:06:41 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:06:41 -0700
Subject: ]ANN[ Vellum 0.16:  Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <7xy76md4we.fsf@ruckus.brouhaha.com>

"Zed A. Shaw" <zedshaw at zedshaw.com> writes:
> How do people feel about Vellum's GPLv3 status? 

I'm certainly in favor of it, though I didn't notice this question
until it spawned its own thread, and I'm not currently a Vellum
user or developer, so maybe my view shouldn't count for much.


From phd at phd.pp.ru  Sun May  4 10:18:13 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sun, 4 May 2008 18:18:13 +0400
Subject: SQLObject 0.10.1
Message-ID: <20080504141813.GD3097@phd.pp.ru>

Hello!

I'm pleased to announce version 0.10.1, a bugfix release of 0.10 branch
of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.10.1

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.10.0
-----------------

Bug Fixes
~~~~~~~~~

* Fixed a bug: limit doesn't work in sqlbuilder.Select.

* A bug in inheritable delColumn() that doesn't remove properties was fixed.

* A minor bug was fixed in col.py - the registry must be passed to findClass().

* Reverted the patch declarative.threadSafeMethod() - it causes more harm
  then good.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From jstucklex at attglobal.net  Thu May 22 23:09:34 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Thu, 22 May 2008 23:09:34 -0400
Subject: php vs python
In-Reply-To: <JemZj.61574$3v1.54084@bignews3.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
Message-ID: <k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>

inhahe wrote:
> I don't like php.  I tried it once and I had it sort a list, but the list 
> was apparently too long for its sorting function because it just sorted the 
> first so-many elements of it and left the rest in order, and didn't generate 
> any error.  I like a language that's actually determined by what you tell it 
> to do.  

Then I suspect you had an error in your code.  PHP's sort functions work 
fine.

> I hear it has a lot of security issues too.  

The language has no security issues.  Programmers have security issues - 
whether it be PHP, Python or any other language.

> I'm not sure that php 
> *runs* faster than python, having seen benchmarks, but it certainly loads 
> faster.  Maybe not so much of a difference once python25.dll is already in 
> the cache though (speaking from a windows perspective).  because when i load 
> a program it can take a while but it's pretty quick if i'd just loaded one 
> recently.  but you don't necessarily have to load python for each page 
> rendering anyway.
> 
> I like the Python language a lot better than php.  but I just really like 
> Python.
> 

I like PHP much better than Python.  To each their own.

> php mixes html and code out-of-the-box (sort of.. i guess it's more like a 
> reversal of which one is explicit)... if you use Python you should look into 
> a 'templating engine' like mako.  i use cheetah, but mako is supposed to be 
> better.
>

PHP can do that.  There are also a number of templating engines 
available.  The nice thing about PHP is you have a choice.

> i think Python is the easiest language to learn, with the possible exception 
> of qbasic (just because making multidimensional arrays in python isnt that 
> obvious, although maybe it is using numpy, i've never tried it).  Python 
> isn't as easy as basic if you use/have to read the more advanced features, 
> but those aren't even available in basic. so I find it a comfortable 
> learning curve.
> 
> 

I found PHP easier to learn than Python.  But that may be because I 
already have a strong C/C++ background.

There isn't anything wrong with Python.  I just prefer PHP.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From apardon at forel.vub.ac.be  Thu May 29 04:14:49 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 29 May 2008 08:14:49 GMT
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <slrng3spfp.7bl.apardon@rcpc42.vub.ac.be>

On 2008-05-24, Fuzzyman <fuzzyman at gmail.com> wrote:
>
> A worthwhile question for the OP - your patch seems fairly simple. Is
> it easy for you to extend unittest for your own testing needs by
> subclassing?

I've been ill the last days, but I will look into this possibility.

-- 
Antoon Pardon


From deets at nospam.web.de  Mon May 19 06:01:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 12:01:56 +0200
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <69d1hnF32r2ugU1@mid.uni-berlin.de>

kuratkull at kuratkull.com wrote:

> Hello,
> 
> ***************
> import urllib2
> import re
> import string
> import sys
> 
> url = "http://www.macgyver.com/"
> request = urllib2.Request(url)
> opener = urllib2.build_opener()
> html = opener.open(request).read()
> 
> match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
> 
> out = match.findall(html)
> 
> print out
> **************
> 
> I would like to print out string with formatting, but as I read, the
> string is made into a raw string when using re.
> How could I disable or bypass this?

You have a misconception here. A raw-string in python is *only* different as
literal - that is, you can write

r"fooo\bar"

where you'd have to write

"fooo\\bar"

with "normal" string-literals. However, the result of both is a byte-string
object that is exactly equal. So whatever out contains, it has nothing to
do with raw-string or not.

But what you probably mean is that putting out a list using print will use
the repr()-call on the contained objects. So instead of doing

print out

do 

print "\n".join(out)

or such.

Diez


From inhahe at gmail.com  Thu May 22 15:29:42 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 15:29:42 -0400
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <5PjZj.78772$%15.70394@bignews7.bellsouth.net>


"Joel Koltner" <zapwireDASHgroups at yahoo.com> wrote in message 
news:5RiZj.165543$ng7.151222 at en-nntp-05.dc1.easynews.com...
> Is there an easy way to get a list comprehension to produce a flat list 
> of, say, [x,2*x] for each input argument?
>
> E.g., I'd like to do something like:
>
> [ [x,2*x] for x in range(4) ]
>
> ...and receive
>
> [ 0,0,1,2,2,4,3,6]
>
> ...but of course you really get a list of lists:
>
> [[0, 0], [1, 2], [2, 4], [3, 6]]
>
> I'm aware I can use any of the standard "flatten" bits of code to turn 
> this back into what I want, but I was hoping there's some way to avoid the 
> "lists of lists" generation in the first place?
>
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" 
> to do so?
>
> Thanks,
> ---Joel
>

i figured out a solution

sum([x,2*x] for x in range(4)],[]) #not tested
sum(zip(list1,list2),()) #not tested

(you did say you knew of ways to flatten, but i dunno if you knew of that 
way or not)

as an aside, i wish that sum didn't have to take the second parameter. it's 
kind of superfluous.  it can just use the first item as the initial value 
instead of 0 when no initial value is specified.   it would be a little 
complex to do without putting a conditional in your main loop and slowing it 
down, but it could be done.




From cokofreedom at gmail.com  Thu May  8 08:08:23 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 8 May 2008 05:08:23 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
	<12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>
Message-ID: <52d0031c-202c-48d2-a61b-27f6c76fd5f3@b64g2000hsa.googlegroups.com>

C#

using System;
namespace HelloWorld
{
Class HelloWorld
{
static void Main(String[] args)
{
Console.WriteLine("Hello World");
}
}
}


From marlin_rowley at hotmail.com  Thu May 15 20:44:09 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 19:44:09 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482CC073.20402@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
	<482C6E59.3020503@islandtraining.com>
	<BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>
	<482CA10E.1040602@islandtraining.com>
	<BAY135-W27F3536596F700EE149C3A9FC90@phx.gbl> 
	<482CC073.20402@islandtraining.com>
Message-ID: <BAY135-W17AB1ED5FC12595613616E9FC80@phx.gbl>

Thanks.  I'll churn on this for awhile..

> Date: Thu, 15 May 2008 16:00:03 -0700> From: gherron at islandtraining.com> To: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > Hey Gary!> > Please keep such discussions on the public python-list -- not personal > e-mail.> > Scroll down for an answer to your latest question.> >> > Here's what I have that renders fine but I see some optimization that > > can be done (as you mentioned):> >> > # Tile Generation> > # This is where all the drawing to the client window> > # will happen. > > def generateTile( txl, tyl, tileWidth, tileHeight, clientWindow ):> > # make rgba (8-bit) data structure and zero it out.> > rgb = zeros( tileWidth*tileHeight*3, UnsignedInt8 )> > alpha = zeros( tileWidth*tileHeight*3, UnsignedInt8 )> > > > #print 'tileWidth: %s' % tileWidth> > #print 'tileHeight: %s' % tileHeight> > # for each pixel in the tile> > # we must invert the rendering of each> > # tile for wxPython's Bitmap support.> > for y in range( (tileHeight-1),-1,-1 ):> > for color in range(4):> > > > # read per scanline> > pixelComp = clientWindow.fileIO.read(4*tileWidth) <<<< > > HERE'S YOUR OPTIMIZATION!!> > > > for x in range(tileWidth):> > # mental ray streams RGBA components across the width> > # of every tile. so it first does all the r's,> > # then all the g's, then all the b's, etc.. across> > # the width.. Then it streams the second row, etc..> > # However, wxPython Bitmap class accepts an array of> > # tuples or just a byte order of RGBARGBARGBA, etc..> > # so we convert, keeping track of an offset.> > if color < 3:> > index = (3*(y*tileWidth+x))+color> > else:> > index = (3*(y*tileWidth+x))> > > > > > # RGBA_FP> > if clientWindow.pixelCode == 13:> > > > # unpack the pixel> > #fourbytes = pixelComp[:4]> > #pixelComp = pixelComp[4:]> > buffer = unpack("!f", pixelComp[4*x:4*x+4]) > > <<<<<<<<<<<<<<<<<< YOUR OPTIMIZATION!!> > > > # convert from 32-bit to 8-bit precision> > gamma = clientWindow.gamma> > if gamma == 1.0:> > pixel = int(255 * buffer[0] + 0.5)> > pixel = clamp(pixel,0,255)> > if color == 3:> > alpha[index+0] = alpha[index+1] = > > alpha[index+2] = pixel> > else:> > rgb[index] = pixel> > else:> > pixel = int(buffer[0] * GAMMA_BIT_PRECISION + 0.5)> > pixel = clamp(pixel,0,GAMMA_BIT_PRECISION-1)> > # set the color and alpha> > if color == 3:> > alpha[index+0] = alpha[index+1] = > > alpha[index+2] = clientWindow.frame.gammaTable[pixel]> > else:> > rgb[index] = > > clientWindow.frame.gammaTable[pixel]> > > > > > # ...> >> > # create an empty rgb and alpha tile> > tileRGB = wx.BitmapFromBuffer( tileWidth, tileHeight, rgb )> > tileAlpha = wx.BitmapFromBuffer( tileWidth, tileHeight, alpha )> > > > # set up main device to render to the current> > # buffers> > dc = wx.BufferedDC( None,clientWindow.colorBuffer )> > dca = wx.BufferedDC( None,clientWindow.alphaBuffer )> > > > # draw tiles> > dc.DrawBitmap( tileRGB, txl, (clientWindow.height-tileHeight)-tyl )> > dca.DrawBitmap( tileAlpha, txl, (clientWindow.height-tileHeight)-tyl )> >> >> > I'm no python expert (as you can tell), but I'm trying.. :)> >> > I started to re-write this function but I'm confused on how to do:> >> > > Reshape the array into a 3D array (i.e., a rectangular array of RGBA> > > values)> >> > this without using a for loop.> > Yes, easily. No Python loops (although plenty of C-level loops.) (I > think you are using Numeric -- a ancient predecessor of numpy. However, > I think these operations work in Numeric.)> > > Again I create a small test case. The values will be in the order > rrrrggggbbbb to start with, and rgbrgbrgbrgb afterwards.> > Create a test array and examine it:> >>> a = numpy.frombuffer('rrrrggggbbbb', dtype='S1')> >>> a> array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b'], > dtype='|S1')> > Isolate each color component (here height*width = 4)> >>> a.shape = (3,4)> >>> a> array([['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b']],> dtype='|S1')> > Transpose it. (This creates a new array by copying efficiently.)> >>> b = a.transpose()> >>> b> array([['r', 'g', 'b'],> ['r', 'g', 'b'],> ['r', 'g', 'b'],> ['r', 'g', 'b']],> dtype='|S1')> > Reset it's shape to be a width*height array of rgb's.> >>> b.shape = (2,2,3)> >>> b> array([[['r', 'g', 'b'],> ['r', 'g', 'b']],> > [['r', 'g', 'b'],> ['r', 'g', 'b']]],> dtype='|S1')> > Put it out in byte array form:> >>> b.tostring()> 'rgbrgbrgbrgb'> > > Done.> > > Gary Herron> > > >> > -M> >> >> > > Date: Thu, 15 May 2008 13:46:06 -0700> > > From: gherron at islandtraining.com> > > CC: python-list at python.org> > > Subject: Re: How do I use the unpack function?> > >> > > Marlin Rowley wrote:> > > > Gary,> > > >> > > > I'm getting streaming tile data from a renderer in order to allow the> > > > user to see the rendering of tiles in real-time to create the total> > > > image. I'm NOT reading an entire image scanline-by-scanline. The> > > > renderer streams in a series of floats (for each tile) and I build> > > > this tile up from each individual color component passed in. I then> > > > convert it to a small bitmap and blit() it to the window that will> > > > eventually make up my entire image. I'm just wanting to make the> > > > process as fast as the renderer can render the tiles. I've noticed on> > > > scenes that aren't very complex for the renderer that my python > > script> > > > is spending most of it's time drawing while the renderer is already> > > > done. What you've given me has sped up the drawing a lot, but I'm> > > > hungry for more optimization!> > > >> > > > There is no file format to be read. The data is raw bytes and can be> > > > any format.> > >> > > You are misinterpreting what I mean by a format. All data is a string> > > of bytes, and interpreting that string of bytes to have some particular> > > form is applying a format to it. Your particular format is: each 4> > > bytes represents a float, and a string of such floats give the RGBA> > > values for a rectangle (of some size) of pixels. I doubt that you are> > > the first ever to use that particular format to encode an image, but I> > > also don't believe it matches any of the standard image formats.> > >> > > So... There is still hope to use already written tools to decode your> > > format.> > >> > > Here's a hint on how to use numpy for decoding a byte string into an> > > array of floats. My example byte string is a hand coded string of just> > > 12 bytes -- you should replace that with a whole row or better yet, a> > > whole tile's worth of bytes.> > >> > > >>> import numpy> > > >>> byteString = '\x00\x00\x80?\x00\x00\x00@\x00\x00@@'> > > >>> b = numpy.frombuffer(byteString, dtype=numpy.float32)> > > >>> b> > > array([ 1., 2., 3.], dtype=float32)> > >> > >> > > If you want to use the array module instead:> > >> > > >>> import array> > > >>> a = array.array('f')> > > >>> a.fromstring(byteString)> > > >>> a> > > array('f', [1.0, 2.0, 3.0])> > >> > >> > > In either case ANY number of bytes can be decoded into an array of> > > floats, in one highly efficient call from Python.> > >> > > What you do with that array of float afterwards is up to you....> > >> > > If I read your note correctly, here's what I'd do to turn the array of> > > bytes into an image of a tile to be displayed on the screen.> > >> > > Get the whole tile's worth of bytes with one read into a single string.> > > Decode that string into an array of floats (as above).> > > Reshape the array into a 3D array (i.e., a rectangular array of RGBA> > > values)> > > Convert that array of floats into an array of 8-bit integers (scaling> > > all by 255).> > > Extract (via tostring) that array into a string of bytes.> > > Send that string of bytes to the graphics system as an RGBA array of> > > pixels.> > >> > > Each of these calls is one Python call into a highly efficient library.> > > This is using Python as a, so called, glue language.> > >> > > Gary Herron> > >> > >> > >> > >> > >> > >> > >> > > >> > > > > Date: Thu, 15 May 2008 10:09:45 -0700> > > > > From: gherron at islandtraining.com> > > > > CC: python-list at python.org> > > > > Subject: Re: How do I use the unpack function?> > > > >> > > > > John Machin wrote:> > > > > > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> > > wrote:> > > > > >> > > > > >> Marlin Rowley wrote:> > > > > >>> > > > > >>> All:> > > > > >>>> > > > > >>> I've got a script that runs really slow because I'm reading > > from a> > > > > >>> stream a byte at a time:> > > > > >>>> > > > > >>> // TERRIBLE> > > > > >>> for y in range( height ):> > > > > >>> for color in range(4):> > > > > >>> for x in range( width ):> > > > > >>> pixelComponent = fileIO.read(4)> > > > > >>> buffer = unpack("!f",pixelComponent) << unpacks ONE> > > > > >>>> > > > > >> > > > > > [snip]> > > > > > Perhaps the OP might be able to use the Python Imaging Library > > (PIL)> > > > > > instead of reinventing an image-file handler.> > > > > >> > > > >> > > > > Indeed. That's why my original answer included the line:> > > > > There are probably better ways overall, but this directly answers> > > > > your question.> > > > >> > > > > Other possibilities.> > > > >> > > > > I don't recognize the file format being read in here, but if it is a> > > > > standard image format, the PIL suggestion is a good way to go.> > > > >> > > > > Or, if it is an image of not too enormous size, read the *whole* > > thing> > > > > in at once.> > > > >> > > > > Or rather than manipulate the array by carving off 4 bytes at a > > time,> > > > > just index through it in 4 byte chunks:> > > > > for i in range(width):> > > > > buffer = unpack("!f", pixelComponent[4*i:4*i+4])> > > > >> > > > > Or> > > > > for i in range(0,4*width,4):> > > > > buffer = unpack("!f", pixelComponent[i:i+4])> > > > >> > > > > Or> > > > > Use numpy. Create an array of floats, and initialize it with the > > byte> > > > > string, making sure to take endianess int account. (I'm quite > > sure this> > > > > could be made to work, and then the whole operation is > > enormously fast> > > > > with only several lines of Python code and *no* Python loops.> > > > >> > > > > Or> > > > > ...?> > > > >> > > > > Gary Herron> > > > >> > > > > > --> > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > > >> > > > >> > > > > --> > > > > http://mail.python.org/mailman/listinfo/python-list> > > >> > > > > > ------------------------------------------------------------------------> > > > Windows Live SkyDrive lets you share files with faraway friends. > > Start> > > > sharing.> > > > > > <http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> > > --> > > http://mail.python.org/mailman/listinfo/python-list> >> > ------------------------------------------------------------------------> > Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it > > out! > > <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Stay in touch when you're away with Windows Live Messenger.
http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_messenger_052008
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From bj_666 at gmx.net  Tue May 13 03:22:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 07:22:05 GMT
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de> <3T7Wj.134606$rd2.31796@pd7urf3no>
Message-ID: <68ststF2uo1qcU1@mid.uni-berlin.de>

On Tue, 13 May 2008 03:25:51 +0000, Yves Dorfsman wrote:

> Marc 'BlackJack' Rintsch wrote:
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing. I
>>> find this unsatisfactory...
>> 
>> Get over it?
> 
> Than what's the point of wanting a better language if every time we run in 
> something that looks wrong, or something that could be done better we should 
>   just "get over it" ?

That advice wasn't for every time something looks wrong but this
particular one.  You can solve it with `operator.itemgetter()` but that
means importing another module and calling a function which looks much
more "heavy weight" to me than one reference to an unused object which
might go away at the end of the function anyway soon.

Ciao,
	Marc 'BlackJack' Rintsch


From nick at craig-wood.com  Sat May  3 05:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 03 May 2008 04:30:03 -0500
Subject: portable fork+exec/spawn
References: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>
	<mailman.457.1209739717.12834.python-list@python.org>
Message-ID: <slrng1o9ia.7q6.nick@irishsea.home.craig-wood.com>

Jean-Paul Calderone <exarkun at divmod.com> wrote:
> >For jobs which require interactivity ie send input, receive output,
> >send input, receive output, ... it doesn't work well.  There isn't a
> >good cross platform solution for this yet.  pyexpect works well under
> >unix and is hopefully being ported to windows soon.
> 
>  There is a good cross-platform solution, in fact.  It's Twisted's
>  spawnProcess API, which works on POSIX and Windows, supports supports
>  sending and receiving, and doesn't have deadlock issues since it's
>  event-driven.

It took me a while but I found the documentation on this eventually

  http://twistedmatrix.com/documents/current/api/twisted.internet.interfaces.IReactorProcess.html

Looks interesting - I'll have to try it next time I'm reaching for
pexpect

Thanks

Nick
-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From joe.p.cool at googlemail.com  Sun May 25 17:32:00 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Sun, 25 May 2008 14:32:00 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>

On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?

I saw this "don't need it" pattern in discussions about the ternary
"if..else" expression and about "except/finally on the same block
level".
Now Python has both. Actually it is very useful to be able to
distinguish
between inside and outside. This is obvious for real world things e.g.
your
TV. Nobody likes to open the rear cover to switch the channel. Similar
arguments apply to software objects. "data hiding" is a harsh name, I
would
call it "telling what matters". The need for this becomes
indispensable in
really big software packages like the Eclipse framework with approx.
100000
classes. If you cannot tell the difference between inside and outside
you
are lost.

> In Python, the philosophy "we're all consenting adults here" applies.

Please don't sell a missing feature as a philosophy. Say you don't
need/want
it. But don't call it philosophy.

> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put.

It's *your* *decision* which uses will be available. Your explanation
appears
to me as a fear to decide.

> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore.

Littering your class definition with dozens of underscores is exactly
the
line noise we love to criticize in Perl.

> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?

Nearly every introduction to OOP? Please don't tell me that
encapsulation
does not mean "enforced restriction". If the language has no syntactic
support for encapsulation then it does not have encapsulation. Similar
argument applies to Java where programmers sometimes claim that Java
"has"
properties because of setCrap/getCrap.

__
Joe


From nospam at here.com  Sun May 18 15:34:34 2008
From: nospam at here.com (Dennis)
Date: Sun, 18 May 2008 20:34:34 +0100
Subject: python confusion possibly related to pickle
In-Reply-To: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
Message-ID: <xJqdnWLFfMVXGa3VnZ2dnUVZ8hidnZ2d@posted.plusnet>


Never mind. I solved it. I had a file called pickle in the same folder I 
was in when I ran python, and that's the file it was trying to import.

Duh @ me :s


Dennis wrote:
> 
> I have a problem that I don't understand at all. I run a python script, 
> which uses pickle, and it fails. That alone is, perhaps, no big deal.
> 
> The problem that's got me annoyed is that after getting said error I 
> close the shell window, open a new one, run the python interpreter and 
> type "import pickle" and get the error that the script I'd run earlier 
> caused. Why is this ?
> 
> To my knowledge, once python stopped running it didn't store anything 
> related to the last time it was run.


From kay.schluehr at gmx.net  Fri May  9 00:09:04 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 8 May 2008 21:09:04 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>

On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On behalf of the Python development team and the Python community, I
> am happy to announce the third alpha release of Python 2.6, and the
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not
> suitable for production environments.  We continue to strive for a
> high degree of quality, but there are still some known problems and
> the feature sets have not been finalized.  These alphas are being
> released to solicit feedback and hopefully discover bugs, as well as
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you.  If you find things broken or incorrect, please submit a bug
> report at
>
>    http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
>    http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
>    http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions.  If all goes
> well, next month will see the first beta releases of both, which will
> also signal feature freeze.  Two beta releases are planned, with the
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
>      http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry
>
> Barry Warsaw
> ba... at python.org
> Python 2.6/3.0 Release Manager
> (on behalf of the entire python-dev team)
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.8 (Darwin)
>
> iQCVAwUBSCORrnEjvBPtnXfVAQIK+QQAgEUtAvW7uo0BxMiT1bCAo2E9ZecWJ9xe
> DBgd/5IK8moITkqhqGAH5UvfytV6uPkOMgGIS/Uvk4hzhU3jwSopEIDJLFQ5nGtC
> lCzOHzkDjSNZ8Q2OOAI9mbSHY8grvVxCMB4X2SVXIEMZ6M/X1AcV2b0utp9O1w/l
> T/PEvP8U1uY=
> =2Tnb
> -----END PGP SIGNATURE-----

http://www.python.org/ftp/python/3.0/python-3.0a5.msi

Error 404: File Not Found

http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi

Error 404: File Not Found


From skanemupp at yahoo.se  Sat May 31 08:48:20 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 31 May 2008 05:48:20 -0700 (PDT)
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
Message-ID: <5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>

On 31 Maj, 04:04, John Henderson <jhenRemoveT... at talk21.com> wrote:
> globalrev wrote:
> > can i send and receive messages from a website using python?
>
> Absolutely.  But I'm not clear what you mean by "from a
> website".  Do you mean to use SMPP protocol to lodge and
> receive messages?  Or do you want access to your own cellular
> hardware from a web interface?
>
> > how would that work with costs? would the mobileowner pay both
> > ways?
>
> That depends on the country, the carrier and the offers/plans
> that carrier makes.  In most of the civilized world, SMS
> receivers pay nothing.
>
> John



i want to build a service where you can send an SMS with your
cellphone to my website and then the site will collect the data you
asked for and SMS it back.

so what components would i need for that?


From reid at reidster.net  Mon May 19 20:58:50 2008
From: reid at reidster.net (Reid Priedhorsky)
Date: Mon, 19 May 2008 19:58:50 -0500
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <pan.2008.05.20.00.58.50.596857@reidster.net>

On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:
>
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.  I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

I find this frustrating too, but not to the extent that I choose a
different language. pylint helps but it's not as good as a nice, strict
compiler.

> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded, so one will need lots of python
> processes on lots of computers, with the database software handling
> parallel accesses to the same or related data.  One could organize it
> as one python program for each url, and one python process for each
> http request, but that involves a lot of overhead starting up and
> shutting down python processes.  Or one could organize it as one
> python program for each url, but if one gets a lot of http requests
> for one url, a small number of python processes will each sequentially
> handle a large number of those requests.  What I am really asking is:
> Are there python web frameworks that scale with hardware and how do
> they handle scaling?

This sounds like a good match for Apache with mod_python.

Reid


From kyosohma at gmail.com  Tue May 27 12:13:44 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 09:13:44 -0700 (PDT)
Subject: how to reply to posts on google groups (and not reply to just 
	author)
References: <b8707517-a5f0-4ed9-ba1d-3a7bacb571f1@2g2000hsn.googlegroups.com>
Message-ID: <8badaef0-1483-4635-b26b-cd88f7033c68@d77g2000hsb.googlegroups.com>

On May 27, 10:44?am, davidj411 <davidj... at gmail.com> wrote:
> I want to reply to the goups and not author for ?an older post (from
> February) , but it seems i can only reply to the author (using google
> groups).
>
> ?Is there a way (within Google groups) to reply to an older post to
> keep that particular thread going instead of posting a new one (as i
> am here now doing - sorry about this being a non-python question.)

You might be able to use the CC functionality and put the c.l.py email
in there to accomplish it. But I really don't know if that will work.
Worth a try though. You can find the email address on the Python
website.

Mike


From Scott.Daniels at Acm.Org  Tue May 20 00:00:10 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 19 May 2008 21:00:10 -0700
Subject: Write bits in file
In-Reply-To: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <8sGdnS3nQNwg16_VnZ2dnUVZ_jqdnZ2d@pdx.net>

Monica Leko wrote:
> On May 18, 2:20 pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
>> You want your file considered as a sequence of bits rather
>> than a sequence of 8-bit bytes, do you?
> Yes.
> 
>> is the 10-bit bit-pattern to be stored at an arbitrary bit-position in
>> the file
> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

You should know there is no single "natural" mapping of files to bit
orders; rather there are several distinct natural such orders.  Define
the mapping you prefer and implement it.  This is even worse than the
"byte sex" issue (go ahead, look it up).

--Scott David Daniels
Scott.Daniels at Acm.Org


From deets at nospam.web.de  Mon May  5 10:45:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 16:45:38 +0200
Subject: Pygame and PGU
References: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>
Message-ID: <688ktbF2rlolmU1@mid.uni-berlin.de>

Zaka wrote:

> Hi. I need some help to make map system in PGU. For exmple we have 2
> maps and when we leave first we enter to second.
> 
> 
> --------------------
>                    !
> 
> 
> ___________

What is a PGU? What is a map-system? And what is that ascii art above?

And what might you learn from reading this:

http://www.catb.org/~esr/faqs/smart-questions.html

Diez


From kylotan at gmail.com  Wed May 28 10:26:54 2008
From: kylotan at gmail.com (Ben Sizer)
Date: Wed, 28 May 2008 07:26:54 -0700 (PDT)
Subject: Using an object-relational mapper to convert between databases
Message-ID: <019cb83a-d4b6-445a-b616-da12b6fd6a48@j22g2000hsf.googlegroups.com>

Hello,

I'd like to be able to do the following:

 - open a connection to a MySQL or PostgreSQL database
 - read the schema and contents for one or more tables
 - create a new sqlite database file and open a connection to it
 - write out the previously-read tables and their contents to this new
database

I get the impression that the various object-relational mappers such
as SQLAlchemy and SQLObject can make this easier, especially if using
something like SQLAlchemy's autoloading capability to query the schema
from the DB rather than me having to explicitly specify it. But then
how easy is it to make a corresponding sqlite table and write the same
objects to it? I don't know how practical this is with SQLAlchemy, or
if a different ORM library would be more useful for this. And since
objects tend to be closely related to the database they are mapped to,
I don't know how easy it is to reflect them onto a second database.

I'd just like some advice and pointers from anybody who's tried
something similar to this or who knows the packages well enough to
point me in the right direction.

--
Ben Sizer


From skanemupp at yahoo.se  Mon May  5 10:29:04 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:29:04 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
Message-ID: <c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>

On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> wrote:
>
> > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> > Are you sure that:
>
> > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> > Check it with python.
>
> > --
> > Regards,
> > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> >>> import os
> >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>
> False
>
> but...it is there....
>
> >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>
> False
>
> does it matter if i use / or \? which si recommended?

i can find .png image in the same folder and when i just change
filename from snake.png to example1.mp3 it is false.

i renamed the file once, could that have anything to do with it?


From java.oke at gmail.com  Mon May 26 16:52:37 2008
From: java.oke at gmail.com (j.oke)
Date: Mon, 26 May 2008 13:52:37 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <358ec7c3-4a25-4591-a705-03446e074b20@25g2000hsx.googlegroups.com>

On 26 Mag, 01:25, "xah... at gmail.com" <xah... at gmail.com> wrote:
> For about the past 10 years, ...

Q: How many comp.lang.X trolls does it take to change a light bulb?

A: One, and Superman. One to hold the bulb, and Superman to screw the
planet.

-JO


From gagsl-py2 at yahoo.com.ar  Tue May 13 23:49:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 00:49:47 -0300
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua4kw9dgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 09:41:25 -0300, Iain King <iainking at gmail.com>  
escribi?:

> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.

I've seen you already answered your question. But are you sure that doing  
this is a good thing? If you try to be too clever or too helpful the  
interfase may become annoying at some times. You can't guess the user's  
intention or read his mind.
By example, what if I already have the desired file name copied in the  
clipboard? I don't want the file selector to pop up.

I completely *hate* Windows programs with a "Browse for folder" button  
that don't let me paste a name, neither start opened at the currently  
selected folder.

-- 
Gabriel Genellina



From fabiofz at gmail.com  Mon May 12 11:42:09 2008
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 12 May 2008 12:42:09 -0300
Subject: Pydev 1.3.17 Released
Message-ID: <cfb578b20805120842y14d9e45fs19156553773834ed@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.17 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Minor bug-fixes

Release Highlights in Pydev:
----------------------------------------------

* Pydev Package Explorer: projects that had the project folder in the
pythonpath did not show children items correctly.
* Debugger: Disable all works. Patch from: Oldrich Jedlicka
* Debugger: Problem when making a step return / step over
* Code-completion: Working for attributes found in a superclass
imported with a relative import
  Patches from Felix Schwarz:
      o Allow to configure an interpreter even if the workspace path
name contains spaces
      o Completion server does not work when the eclipse directory
contains spaces
      o Fix deletion of resources in pydev package explorer for Eclipse 3.4



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and
Jython development -- making Eclipse a first class Python IDE -- It
comes with many goodies such as code completion, syntax highlighting,
syntax analysis, refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com


From straton at lampsacos.demon.co.uk  Sun May 18 08:20:14 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 13:20:14 +0100
Subject: Write bits in file
In-Reply-To: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <g0p6u1$nk8$1$8300dec7@news.demon.co.uk>

You want your file considered as a sequence of bits rather
than a sequence of 8-bit bytes, do you? is the 10-bit
bit-pattern to be stored at an arbitrary bit-position in
the file, or is the whole file regularly subdivided
at 10-bit intervals?


Monica Leko wrote:
> Hi
> 
> I have a specific format and I need binary representation.  Does
> Python have some built-in function which will, for instance, represent
> number 15 in exactly 10 bits?


From rdahlstrom at directedge.com  Thu May 29 07:23:45 2008
From: rdahlstrom at directedge.com (Dahlstrom, Roger)
Date: Thu, 29 May 2008 07:23:45 -0400
Subject: [python-win32] How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
	<DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
	<79990c6b0805290422g5b61f3c5l65034ee6e5798178@mail.gmail.com>
Message-ID: <DE02840141C15249B2FAE5A61B40EA1C0429A5@jc1wsmail6.global.knight.com>

-----Original Message-----
From: Paul Moore [mailto:p.f.moore at gmail.com] 
Sent: Thursday, May 29, 2008 7:23 AM
To: Dahlstrom, Roger
Cc: Python-Win32 List; python-list at python.org
Subject: Re: [python-win32] How to get all the variables in a python shell

On 29/05/2008, Dahlstrom, Roger <rdahlstrom at directedge.com> wrote:
> I'd try looking at memcached (http://www.danga.com/memcached/apis.html).
>  No hacking or reimplementation of the interpreter would be necessary, and
> there's a Python api available.  I haven't used it for anything production related,
> but I have played with it a bit, and it's fast and stable.

Is memcached available for Windows, then? I've heard nice things about
it, but thought it was Unix-only.

Paul.


----------------------------

It is available for Windows, yes.  As a matter of fact, I've never used it on Unix.


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From bignose+hates-spam at benfinney.id.au  Fri May  2 09:17:28 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 23:17:28 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
Message-ID: <87r6ckzvyv.fsf@benfinney.id.au>

Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> writes:

> -On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
> >To my mind, the Python interpreter installed by a package as
> >distributed with the OS *is* OS territory and belongs in /usr/bin/.
> 
> That's the difference with a distribution, such as Linux, and full
> OSes , such as BSDs or commercial Unix variants. They prefer to keep
> a pristine state for the OS vendor files versus what the user can
> opt to install himself, hence the /usr/bin - /usr/local/bin
> separation.

Fine so far. /usr/local/ is certainly for "what the (system
administrator) user opts to install themselves".

> It effectively guarantees you can nuke /usr/local without ill
> consequences for your OS.

You say this as though it's a property that a GNU/Linux distribution
doesn't have. But the "keep /usr/local/ untouched by OS packages"
approach taken by GNU/Linux *also* means that /usr/local/ can be blown
away without ill consequences for the OS. So I don't see why you draw
that distinction here.

The difference seems to be that Python is an OS-installable package on
GNU/Linux, and thus gets installed to the OS-packaged location. So the
default Python installation should work.

Whereas if Python is *not* installed from an OS package, it's up to
the sys admin to ensure that it works -- not up to my program. So I
don't see the point in making it work by default, when what I want for
my program is that it works *with the default Python*, not with some
non-default installation.

-- 
 \       "Truth is stranger than fiction, but it is because fiction is |
  `\         obliged to stick to possibilities, truth isn't."  -- Mark |
_o__)                                   Twain, _Following the Equator_ |
Ben Finney


From johnjsal at NOSPAMgmail.com  Tue May 20 12:33:55 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 12:33:55 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
Message-ID: <027e4d96$0$25054$c3e8da3@news.astraweb.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
> the above code is pretty much of a no-no because it has quadratic runtime
> behavior.


What's that mean, exactly? Are you referring to both examples, or just the 
second one? 




From arnodel at googlemail.com  Tue May  6 02:06:02 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 07:06:02 +0100
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com>
	<fvohne$m0f$1@news.xmission.com>
	<96a41fd1-23ca-482f-9575-5123611ade8a@z72g2000hsb.googlegroups.com>
Message-ID: <m2d4o06k6t.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 5, 11:02 pm, dave <squareswallo... at yahoo.com> wrote:
>> On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>>
>>
>>
>> > dave <squareswallo... at invalid.com> writes:
>>
>> >> Hello,
>>
>> >> I made a function that takes a word list (one word per line, text
>> >> file) and searches for all the words in the list that are 'shifts' of
>> >> eachother.  'abc' shifted 1 is 'bcd'
>>
>> >> Please take a look and tell me if this is a viable solution.
>>
>> >> def shift(word, amt):
>> >>        ans = ''
>> >>        for letter in word:
>> >>                ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>> >>        return ans
>>
>> > In Python, if you want to build a string from lots of parts you can
>> > use ''.join(parts).  I think it is considered more efficient.
>>
>> what would be the best way to write a "ans = ans + chr" into a
>> ''.join(parts) ??
>
> Well if you do it once, that would be simply "ans += chr". Arnaud was
> referring to the case where you do it in a loop, like in your snippet.
> A direct translation to use ''.join would be:
>
> ans = ''.join(chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>               for letter in word)
>
> Of course it is simpler and more efficient if you factor out of the
> loop the subexpressions that don't need to be recomputed:
>
> ord_a = ord('a')
> shift = ord_a - amt
> ans = ''.join(chr((ord(letter) - shift) % 26 + ord_a)
>               for letter in word)
>
> George

Or keep the same layout as your original effort, but build a list of
chars instead of a string, then join them all at the end.

def shift(word, amt):
    shifted = ''
    ord_a = ord('a')
    shift = ord_a - amt
    for letter in word:
        shifted.append(chr((ord(letter) - shift) % 26 + ord_a))
    return ''.join(shifted)

(Which exactly the same as George's snippet, except that the generator
expression is unwound)

-- 
Arnaud


From petr.poupa at gmail.com  Mon May 12 12:19:48 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 09:19:48 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.986.1210607718.12834.python-list@python.org>
Message-ID: <ede112da-da8e-413f-8f03-8e9edb4e6323@d77g2000hsb.googlegroups.com>

On 12 Kv?, 17:54, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 08:34:07 -0700 (PDT), petr.po... at gmail.com wrote:
> >Hello,
> >I am beginner but so I need help. I have small script for receive data
> >from port 3883, but it print only once.
>
> >import socket
>
> >HOST = 'localhost'
> >PORT = 3883
> >s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >s.connect((HOST, PORT))
> >data = s.recv(2048)
> >s.close()
> >print 'receive data from server:', `data`
>
> >So I try to write cycle to this script, like this:
>
> >import socket
>
> >HOST = 'localhost'
> >PORT = 3883
> >s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >while 1:
> >    s.connect((HOST, PORT))
> >    data = s.recv(2048)
> >    s.close()
> >    print 'receive data from server:', `data`
>
> >But Python reporting:
>
> >Traceback (most recent call last):
> >  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
> ><module>
> >    s.connect((HOST, PORT))
> >  File "<string>", line 1, in connect
> >  File "C:\Python25\lib\socket.py", line 141, in _dummy
> >    raise error(EBADF, 'Bad file descriptor')
> >error: (9, 'Bad file descriptor')
>
> >Where is the mistake? I dont know.
>
> You cannot reconnect a socket.  You need to create a new one for each
> connection.  It's also almost certainly the case that the way you are
> receiving data is incorrect.  There is no guarantee that you will get
> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
> the bytes written to the socket by the peer will be returned by such
> a call.  Instead, you need a framing protocol to determine when all
> data has been received.  For example, you might length prefix the
> data, or you might insert a delimiter (or a terminator) at the end.  Or
> if there is exactly one message to receive, then you should just read
> until the recv call returns '', indicating EOF.
>
> Jean-Paul

ok thanks, but I am true greenhorn, so you think that the best way is
write new script?
Could you send me code if it isnt long, becase I have no idea and
unfortunately time as well.

Petr
Petr


From gnewsg at gmail.com  Sat May 31 15:36:36 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 31 May 2008 12:36:36 -0700 (PDT)
Subject: Question about files?
References: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>
	<INedneYt2rOlO9zVnZ2dnUVZ_qzinZ2d@earthlink.com>
	<a9501197-1f56-4cd6-9620-408ea5ef9df8@79g2000hsk.googlegroups.com>
Message-ID: <696821f8-33a6-47b1-874c-ca7a4bce5e2e@c58g2000hsc.googlegroups.com>

On 31 Mag, 21:28, corvettecra... at gmail.com wrote:
> On May 31, 3:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
>
>
> > On Sat, 31 May 2008 11:44:14 -0700 (PDT), corvettecra... at gmail.com
> > declaimed the following in comp.lang.python:
>
> > > I want to create a program where a user can type what ever they want
> > > to, have it saved to a file, and the be able to re-open it and read
> > > it. How would I do this? Thanks!
>
> > import os
> > os.system("edit") ? ? # may be Windows specific
>
> > ? ? ? ? Start with:http://www.catb.org/~esr/faqs/smart-questions.html
>
> > (or, to expand on it... Exactly what part of the task are you having
> > problems with? Opening files for read/write/update? Designing a command
> > set for an editor? Designing a GUI for a text editor; what toolkit, does
> > it have a generic text edit widget already? Do you really need to write
> > another text editor when there are so many available that come with most
> > operating systems (Windows: edit, notepad, maybe even wordpad;
> > UNIX/Linux type systems: vi, vim, gvim, emacs) or can be downloaded
> > (SciTE) )
>
> > --
> > ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> > ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> > ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> > ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> > ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/
>
> No, what I mean is for the user to input text directly into the python
> program

You can use raw_input() to ask user to type something, then use open()
to create a file and write in it.
http://docs.python.org/lib/bltin-file-objects.html

> then the program would save it to a file and display it after
> it is created.

What do you mean by "display"?
Open that file with a text editor? Print the content of the file on
screen?


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From univbgp100 at gmail.com  Sat May 24 03:39:05 2008
From: univbgp100 at gmail.com (Dhanabal)
Date: Sat, 24 May 2008 00:39:05 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP
Message-ID: <e58656c6-8102-4cfe-b5b9-85655cd877e1@f24g2000prh.googlegroups.com>

FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP visit ebooks.univdatabase.com


From alex.m.gusarov at gmail.com  Tue May 27 08:04:58 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 19:04:58 +0700
Subject: integration with browser
In-Reply-To: <ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
	<ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>
Message-ID: <ac6dcb3d0805270504u2a5dc362v544571a7b3b5b63b@mail.gmail.com>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
>
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.

Really, try WebKit - Safari browser uses it.
Last releases of PyQt4 (Qt, of course, too) includes QWebKit - WebKit wrappings.

--
Best regards, Alex Gusarov


From notbob at nothome.com  Thu May 22 12:25:41 2008
From: notbob at nothome.com (notbob)
Date: Thu, 22 May 2008 16:25:41 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<KfidnYdly6aMTKnVnZ2dnUVZ_qLinZ2d@comcast.com>
Message-ID: <98hZj.1157$5u.860@fe127.usenetserver.com>

On 2008-05-22, Larry Bates <larry.bates at websafe.com`> wrote:

> Check out the Pylons blog tutorial.  You will have a simple blog up and running 
> in less than 30 minutes and have a platform to extend it with as much 
> functionality as you want later on.
>
> Larry Bates
>
> Pylons blog tutorial:
>
> http://wiki.pylonshq.com/display/pylonscookbook/Making+a+Pylons+Blog

Thnx, Larry.  FYI: the above page doesn't exist:

"The page you were trying to reach does not exist. You may want to try a
search, or browse the site to find the page you were looking for."

....but, there's a link to a pylons cookbook, which I will explore.

nb


From arnodel at googlemail.com  Mon May 26 17:07:11 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 22:07:11 +0100
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <m2d4n86agw.fsf@googlemail.com>

"Russ P." <Russ.Paielli at gmail.com> writes:

> On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk> escribi?:
>>
>> >> I am also bothered a bit by the seeming inconsistency of the rules for
>> >> the single underscore. When used at file scope, they make the variable
>> >> or function invisible outside the module, but when used at class
>> >> scope, the "underscored" variables or functions are still fully
>> >> visible. For those who claim that the client should be left to decide
>> >> what to use, why is the client prohibited from using underscored
>> >> variables at file scope?
>>
>> > I don't remember why this is. I'll leave you to track down the
>> > rationale for this particular behaviour. ;-)
>>
>> There is no rationale because this is not how it works...
>> You can:
>> - import a module and access *all* of their names, even names prefixed with an underscore
>> - import any name from a module, even if it starts with an underscore
>> - import * from a module, and it will import all names listed in __all__, even if they start with an underscore
>>
>> Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.
>>
>> --
>> Gabriel Genellina
>
>
> Well, that's interesting, but it's not particularly relevant to the
> original point. By default, underscored variables at file scope are
> not made visible by importing the module in which they appear. But
> underscored member variables of a class *are* made visible to the
> client by default. That's seems at least slightly inconsistent to me.

Apart from the fact that modules and classes are very different ideas,
look at this code:

========================================
import random

class A(object):
    def __init__(self, val):
        self._val = val

class B(A):
    def f(self, other):
        return random.choice([self, other])._val

a = A(1)
b = B(2)

b.f(a)
========================================

So you want the last line to return 2 if b is chosen and raise a
ValueError if a is chosen.  Good luck implementing that!

        
> The issue here, for me at least, is not whether the data or methods
> should be absolutely hidden from the client. I'm perfectly willing to
> say that the client should have a back door -- or even a side door --
> to get access to "private" data or methods.
>
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.

Python is a dynamic language, attributes can be added to objects at
any time in their life.  Consider:

class A(object):
    private x # Suspend belief for a minute...
    def __init__(self, x):
        self.x = x

a = A()
a.x = 2 # What behaviour do you propose here?

> Is this a major issue? No. Is it a significant issue. Yes, I think so.
>
> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.
>
> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

I didn't use to be very fond of it either but I have to admit that it
conveys very useful information.

-- 
Arnaud


From mnordhoff at mattnordhoff.com  Sat May 10 09:26:29 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sat, 10 May 2008 13:26:29 +0000
Subject: Simple question
In-Reply-To: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>	<68lj5oF2sudm7U1@mid.individual.net>
	<205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>
Message-ID: <4825A285.3050002@mattnordhoff.com>

Gandalf wrote:
> my server is my computer and all i did way to install python on it.

But what web server program are you using? Apache? IIS? Lighttpd?
-- 


From gagsl-py2 at yahoo.com.ar  Fri May 16 01:16:53 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 02:16:53 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
	<1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>
	<op.ua7516f3x6zn5v@gabriel2.softlabbsas.com.ar>
	<1e5bcefd0805151932ie56e5dcx999c5181ce799f27@mail.gmail.com>
Message-ID: <op.ua8eaft1x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 23:32:38 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> New mantra: Test to the interfaces (as in program to the interfaces) :)

Seems reasonable...

> However, I'm curious on how you would test the mathprogram.divide(x,y)
> function. But in this case I'm not testing the implementation. I don't  
> care
> how the divide process is done, only that it is done correctly (10/2 =  
> 5).
> Actually my posted example was meant to be like this:
>
> def test_divide
>   divdend = 10
>   divisor = 2
>   expected_result = 5
>   #10/2 should be 5, so let's test if the method gets it right:
>   self.assertEquals(mathprogram.divide(dividend,divisor),  
> expected_result)

Mmm, it's hard to tell in this example what's the purpose of  
mathprogram.divide, because Python already knows how to divide numbers.  
The code above is certainly a way to test the function; but aren't we  
testing the *Python* operator / instead of our own code?
(I'm thinking of mock objects here [1] - this example is too simple,  
perhaps it's hard to get the idea, see the wikipedia article for a few  
other examples)

[1] http://en.wikipedia.org/wiki/Mock_object

-- 
Gabriel Genellina



From tnelson at onresolve.com  Wed May  7 15:52:05 2008
From: tnelson at onresolve.com (Trent Nelson)
Date: Wed, 7 May 2008 12:52:05 -0700
Subject: REMINDER: Python Sprint Weekend This Weekend!
Message-ID: <87D3F9C72FBF214DB39FA4E3FE618CDC6E249D3D17@EXMBX04.exchhosting.com>

Just a friendly reminder that this weekend is the Python sprint weekend!  Look forward to seeing everyone on #python-dev irc.freenode.net over the course of the weekend!

        Trent.

On 16 Apr, 18:52, Trent Nelson wrote:
>
>    Following on from the success of previous sprint/bugfix weekends and
>    sprinting efforts at PyCon 2008, I'd like to propose the next two
>    Global Python Sprint Weekends, taking place on the following dates:
>
>        * May 10th-11th (four days after 2.6a3 and 3.0a5 are released)
>        * June 21st-22nd (~week before 2.6b2 and 3.0b2 are released)
>
>    It seems there are a few of the Python User Groups keen on meeting
>    up in person and sprinting collaboratively, akin to PyCon, which I
>    highly recommend.  I'd like to nominate Saturday across the board
>    as the day for PUGs to meet up in person, with Sunday geared more
>    towards an online collaboration day via IRC, where we can take care
>    of all the little things that got in our way of coding on Saturday
>    (like finalising/preparing/reviewing patches, updating tracker and
>    documentation, writing tests ;-).
>
>    For User Groups that are planning on meeting up to collaborate,
>    please reply to this thread on python-dev at python.org and let every-
>    one know your intentions!
>
>    As is commonly the case, #python-dev on irc.freenode.net will be
>    the place to be over the course of each sprint weekend; a large
>    proportion of Python developers with commit access will be present,
>    increasing the amount of eyes available to review and apply patches.
>
>    For those that have an idea on areas they'd like to sprint on and
>    want to look for other developers to rope in (or just to communicate
>    plans in advance), please also feel free to jump on this thread via
>    python-dev@ and indicate your intentions.
>
>    For those that haven't the foggiest on what to work on, but would
>    like to contribute, the bugs tracker at http://bugs.python.org is
>    the best place to start.  Register an account and start searching
>    for issues that you'd be able to lend a hand with.
>
>    All contributors that submit code patches or documentation updates
>    will typically get listed in Misc/ACKS.txt; come September when the
>    final release of 2.6 and 3.0 come about, you'll be able to point at
>    the tarball or .msi and exclaim loudly ``I helped build that!'',
>    and actually back it up with hard evidence ;-)
>
>    Bring on the pizza and Red Bull!
>
>        Trent.


From __peter__ at web.de  Fri May 30 14:25:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 May 2008 20:25:57 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<4840407c$0$4845$9b622d9e@news.freenet.de>
Message-ID: <g1pgrg$nff$00$1@news.t-online.com>

"Martin v. L?wis" wrote:

>>> File
>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>>> line 281, in execute
>>>     sql = unicode(sql, self.Encoding)
>>> LookupError: unknown encoding: utf_8_euro
>> 
>> At the application (DABO) mailing list, they have pointed that this has
>> to be a Python issue.
> 
> It's definitely not a Python issue.
> 
>> As I'm a totally python newbie, I would ask if
>> somebody has experimented this kind of error, and if there is any known
>> solution. I've found no clue searching at Google right now.
> 
> The problem is that self.Encoding is incorrect - it should not be
> utf_8_euro. Instead, it should be UTF-8 (or perhaps utf_8). DABO
> shouldn't use locale.getdefaultlocale()[1], but
> locale.getpreferredencoding().

I think that is the effect of a bug:

>>> locale._parse_localename("en_US.UTF-8 at euro")
('en_US', 'utf_8_euro')

The function first normalizes the "@" away and then looks for it. Is that
the expected behaviour?

Peter


From skunkwerk at gmail.com  Fri May  9 00:30:32 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Thu, 8 May 2008 21:30:32 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>
Message-ID: <7e4721aa-4dac-466c-b884-6314ead136b6@q1g2000prf.googlegroups.com>

On May 8, 4:54 pm, castiro... at gmail.com wrote:
> On May 8, 5:45 pm, skunkwerk <skunkw... at gmail.com> wrote:
>
>
>
> > i'm getting the wrong output for the 'title' attributes for this
> > data.  the queue holds a data structure (item name, position, and list
> > to store results in).  each thread takes in an item name and queries a
> > database for various attributes.  from the debug statements the item
> > names are being retrieved correctly, but the attributes returned are
> > those of other items in the queue - not its own item.  however, the
> > model variable is not a global variable... so i'm not sure what's
> > wrong.
>
> > i've declared a bunch of workerthreads(100) and a queue into which
> > new requests are inserted, like so:
>
> > queue = Queue.Queue(0)
> >  WORKERS=100
> > for i in range(WORKERS):
> >         thread = SDBThread(queue)
> >         thread.setDaemon(True)
> >         thread.start()
>
> > the thread:
>
> > class SimpleDBThread ( threading.Thread ):
> >    def __init__ ( self, queue ):
> >                 self.__queue = queue
> >                 threading.Thread.__init__ ( self )
> >    def run ( self ):
> >                 while 1:
> >                         item = self.__queue.get()
> >                         if item!=None:
> >                                 model = domain.get_item(item[0])
> >                                 logger.debug('sdbthread item:'+item[0])
> >                                 title = model['title']
> >                                 scraped = model['scraped']
> >                                 logger.debug("sdbthread title:"+title)
>
> > any suggestions?
> > thanks
>
> I'll base this on terminology: if a model is in a brain (throughout
> the known universe), and a dollar's a dollar, it may not pay to build
> a computer out of brains.
>
> If man arises as a tool-carrier, we will carry tools, not people.
> Don't use Python to make people; make money, and not too much.  Pick a
> wage and you might get somewhere.

excuse me?


From jschroed at gmail.com  Thu May  8 22:50:20 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 19:50:20 -0700
Subject: How can I add spaces where ever I have capital letters?
In-Reply-To: <55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>
	<mailman.829.1210298651.12834.python-list@python.org>
	<55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>
Message-ID: <4878ad7b0805081950x309c4f6s9b260261c39183e9@mail.gmail.com>

I do like one-liners and do not like regexps!  That code puts mine to
shame...  Thanks for the tip.  I'll use that one instead.

On Thu, May 8, 2008 at 7:40 PM, Dan Bishop <danb_83 at yahoo.com> wrote:

> > On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com>
> wrote:
> > > I have a string (which I got from the names of my classes) and I would
> like
> > > to print out my CamelCase classes as titles.
> >
> > > I would like it to do this:
> >
> > >>>> my_class_name = "ModeCommand"
> > > ## Do some magic here
> > >>>> my_class_name
> > > 'Mode Command'
> >
> > > Anyone know any easy way to do this?  Thanks.
>
> On May 8, 9:04 pm, "Eric Wertman" <ewert... at gmail.com> wrote:
> > Something like this.  I'm sure there are other ways to do it.
> >
> > import re
> >
> > def addspace(m) :
> >         return ' ' + m.group(0)
> >
> > strng = "ModeCommand"
> >
> > newstr =  re.sub('[A-Z]',addspace,strng)
> >
> > print newstr.strip()
>
> Yes, there are other ways to do it.  If, for example, you like one-
> liners but not regexps:
>
> def add_spaces(text):
>    return text[:1] + ''.join((' ' + char if char.isupper() else char)
> for char in text[1:])
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From duncan.booth at invalid.invalid  Sun May 11 15:55:31 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 May 2008 19:55:31 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
Message-ID: <Xns9A9BD4DD2720duncanbooth@127.0.0.1>

7stud <bbxx789_05ss at yahoo.com> wrote:

>> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" +
> self.matrix[c][0] + "_other.txt\"" 

It wouldn't exactly result in either of the error messages you posted, but 
I expect the spurious quote marks round the filename will be giving you 
problems.

Surely you want the filename to be something like 'proctemp\fred_other.txt' 
rather than '"proctemp\fred_other.txt"' with the spurious double quotes?


From paul at science.uva.nl  Tue May 13 06:54:39 2008
From: paul at science.uva.nl (Paul Melis)
Date: Tue, 13 May 2008 12:54:39 +0200
Subject: Backslash frowned upon?
In-Reply-To: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <g0bs1f$8o7$1@info.science.uva.nl>

wxPythoner at gmail.com wrote:
> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?

Yes, it's still valid to use in a script.

See http://docs.python.org/dev/3.0/whatsnew/3.0.html for the big changes 
coming with 3.0

Paul


From takaurai at gmail.com  Thu May 29 06:32:26 2008
From: takaurai at gmail.com (=?ISO-2022-JP?B?GyRCJD8kKxsoQg==?=)
Date: Thu, 29 May 2008 03:32:26 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
References: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>
	<d55abb23-1f0f-4724-8feb-4f68f0857711@z16g2000prn.googlegroups.com>
Message-ID: <fde0c5a6-d710-40da-9625-8df000a01a3a@q24g2000prf.googlegroups.com>

thanks for your reply.

I tried below python codes with "Py_single_input" instead of
"Py_file_input".

sample 1 : result is INCOMPLETE
for i in range(3):\n

sample 2 : result is COMPLETE(I want to get INCOMPLETE or something)
for i in range(3):\n\tprint i
   or
for i in range(3):\n\tprint i\n

"Py_single_input" and "Py_file_input" seem the same. How come?

> Plz check details in Grammar/Grammar from python source distribution

thanks. I challenge it.

--urai


From rossgk at gmail.com  Wed May 28 12:04:33 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 09:04:33 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
Message-ID: <2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>

On May 28, 12:01 pm, RossGK <ros... at gmail.com> wrote:
> I'm a newbie to python threads, and playing with some simple client
> server stuff and lots of print statements.
>
> My server thread launched with
>      self.worker = WorkerThread(self)
> completes an interaction and then if I check on it's status with
>      print "Status:", self.worker        I get        Status none
>
> A client thread behaves differently. Launched as
>       self.clientWorker( = ClientThreadself)
> when it finishes it's work, I instead get:
>      Status: <ClientThread(Thread-2, stopped)>
>
> If I check the isAlive status on each of those, self.worker.isAlive
> throws an exception, 'cause there is nothing there anymore to check
> isAlive on.  But self.clientWorker comes back as False, since it is a
> stopped thread and hasn't gone away (which I'd like it to after it
> finishes its work).
>
> So my question is when a thread finishes its work how do I more
> predictably control whether it is just stopped, or goes away all
> together?   I don't want to do a double nested 'if' statement to check
> if it exists before I check if it's alive.



Pls ignore the obvious typos, this isn't a syntax question and google
groups seems to be messing with my typing and spacing(!)  e.g.
>       self.clientWorker( = ClientThreadself)
should have read
       self.clientWorker = ClientThread(self)

As I swear I had typed it...




From cbc at unc.edu  Mon May 19 14:01:48 2008
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 19 May 2008 14:01:48 -0400
Subject: Python and Plone Boot Camps in Chapel Hill, NC
Message-ID: <4831C08C.1090706@unc.edu>

Triangle (NC) Zope and Python Users Group (TriZPUG) is proud to open 
registration for our fourth annual ultra-low cost Plone and Python 
training camps, BootCampArama 2008:

http://trizpug.org/boot-camp/2008/

Registration is now open for:

PyCamp: Python Boot Camp, August 4 - 8

Plone Boot Camp: Customizing Plone, July 28 - August 1

Advanced Plone Boot Camp: Plone 3 Techniques, August 4 - 8

All of these take place on the campus of the University of North 
Carolina at Chapel Hill in state of the art high tech classrooms, with 
free mass transit, low-cost accommodations with free wireless, and 
convenient dining options.

Plone Boot Camp is taught by Joel Burton, twice chair of the Plone 
Foundation. Joel has logged more the 200 days at the head of Plone 
classrooms on four continents. See plonebootcamps.com for dozens of 
testimonials from Joel's students.

PyCamp is taught by Chris Calloway, facilitator for TriZPUG and 
application analyst for the Southeast Coastal Ocean Observing System. 
Chris has developed PyCamp for over 1500 hours on behalf of Python user 
groups. Early bird registration runs through June 30. So register today!

PyCamp is TriZPUG's Python Boot Camp, which takes a programmer familiar 
with basic programming concepts to the status of Python developer with 
one week of training. If you have previous scripting or programming 
experience and want to step into Python programming as quickly and 
painlessly as possible, this boot camp is for you. PyCamp is also the 
perfect follow-on to Plone Boot Camp: Customizing Plone the previous week.

At Plone Boot Camp: Customizing Plone you will learn the essentials you 
need to build your Plone site and deploy it. This course is the most 
popular in the Plone world--for a good reason: it teaches you practical 
skills in a friendly, hands-on format. This bootcamp is aimed at:
     * people with HTML or web design experience
     * people with some or no Python experience
     * people with some or no Zope/Plone experience
It covers using Plone, customizing, and deploying Plone sites.

At Advanced Plone Boot Camp: Plone 3 Techniques you will learn to build 
a site using the best practices of Plone 3 as well as advance your 
skills in scripting and developing for Plone. The course covers the new 
technologies in Plone 3.0 and 3.1 intended for site integrators and 
developers: our new portlet infrastructure, viewlets, versioning, and a 
friendly introduction to Zope 3 component architecture. Now, updated for 
Plone 3.1! The course is intended for people who have experience with 
the basics of Plone site development and HTML/CSS. It will cover what 
you need to know to take advantage of these new technologies in Plone 3.

For more information contact: info at trizpug.org


From bignose+hates-spam at benfinney.id.au  Fri May 23 22:23:13 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 12:23:13 +1000
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <87hccocuem.fsf@benfinney.id.au>

Antoon Pardon <apardon at forel.vub.ac.be> writes:

> The answers seemed to be negative. Since I really would like this
> behaviour

I didn't see you explain *why* you think this behaviour is desirable.
You've already had responses that explained why it leaves you open to
more bugs when code only works if tests run in a specific order.

> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?

No and no. If anything, unit test cases should be run in a completely
*non*-deterministic sequence.

-- 
 \         "In prayer, it is better to have a heart without words than |
  `\                          words without heart."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney


From upton at virginia.edu  Fri May 16 14:28:27 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 14:28:27 -0400
Subject: writing python extensions in assembly
In-Reply-To: <a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
	<mailman.1236.1210959884.12834.python-list@python.org>
	<a4kXj.142757$Er2.127823@bignews6.bellsouth.net>
Message-ID: <5504f9ac0805161128t798f630br721c6a65e92fdbd9@mail.gmail.com>

On Fri, May 16, 2008 at 2:08 PM, inhahe <inhahe at gmail.com> wrote:
>
> "Dan Upton" <upton at virginia.edu> wrote in message
> news:mailman.1236.1210959884.12834.python-list at python.org...
>
>
>>
>> On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>>>
>>> Why wouldn't the compilers support it? It's part of the x86
>>> architexture,
>>> isn't it?
>>
>> Yeah, but I don't know if it uses it by default, and my guess is it
>> depends on how the compiler back end goes about optimizing the code
>> for whether it will see data access/computation patterns amenable to
>> SIMD.
>
> perhaps you explicitly use them with some extended syntax or something?
>

Hey, I learned something today.

http://www.tuleriit.ee/progs/rexample.php

Also, from the gcc manpage, apparently 387 is the default when
compiling for 32 bit architectures, and using sse instructions is
default on x86-64 architectures, but you can use -march=(some
architecture with simd instructions), -msse, -msse2, -msse3, or
-mfpmath=(one of 387, sse, or sse,387) to get the compiler to use
them.

As long as we're talking about compilers and such... anybody want to
chip in how this works in Python bytecode or what the bytecode
interpreter does?  Okay, wait, before anybody says that's
implementation-dependent: does anybody want to chip in what the
CPython implementation does?  (or any other implementation they're
familiar with, I guess)


From casey.mcginty at gmail.com  Wed May 28 01:09:27 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Tue, 27 May 2008 19:09:27 -1000
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
Message-ID: <ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>

>            self.event[] = Event()   *# Seems this is not allowed ?? *
>

self.event = [Event()]

- Casey
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From znfmail-pythonlang at yahoo.com  Tue May 27 11:13:49 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Tue, 27 May 2008 11:13:49 -0400
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
	<69vg5qF34vemeU1@mid.uni-berlin.de>
	<bf1929ee-647b-4046-b1ea-d693020503a2@w1g2000prd.googlegroups.com>
Message-ID: <g1h8fh$f87$1@aioe.org>

Can you consider a webservice under something like CherryPY, rather than 
cgi? It may provide more options.


"Rohan" <nrohan at gmail.com> wrote in message 
news:bf1929ee-647b-4046-b1ea-d693020503a2 at w1g2000prd.googlegroups.com...
> Thanks Diez for your suggestion.
>
>>
>> The only way I can think of is to regularly output something inside the 
>> CGI,
>> and thus make it fail in the very moment the pipe is closed.
>>
>
> I also thought of this, but this looks little crude approach.
> The problem seems very generic I was wondering if it could be handled
> more
> gracefully by some configuration in Apache or cgi script.
>
> Apache process handling the request would close the connection with
> client,
> but it won't notify anything to spawned CGI process, so it keeps
> running.
>
> 




From yves at zioup.com  Mon May 12 23:25:51 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:25:51 GMT
Subject: anonymous assignment
In-Reply-To: <68q50pF2u2t25U2@mid.uni-berlin.de>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de>
Message-ID: <3T7Wj.134606$rd2.31796@pd7urf3no>

Marc 'BlackJack' Rintsch wrote:
>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>> But you still have have a variable that's using memory for nothing. I
>> find this unsatisfactory...
> 
> Get over it?

Than what's the point of wanting a better language if every time we run in 
something that looks wrong, or something that could be done better we should 
  just "get over it" ?


Yves.


From larry.bates at websafe.com`  Fri May 30 09:43:39 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 30 May 2008 08:43:39 -0500
Subject: Generating event from event
In-Reply-To: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
Message-ID: <Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>

Gandalf wrote:
> I have script which being triggered by pressing CTRL+Right mouse click
> from any place in my O.P , Now I need to generate automatically event
> like copy my selected item or double clicking the right mouse cursor
> without user interfering.
> how can i implement this width python?
> 
> 
> thanks!
You didn't tell us enough to answer your question.  What GUI are you
using?  Nearly every one of them that I'm aware of allow you to register
handlers for such events.

-Larry


From alexelder at gmail.com  Mon May  5 06:47:51 2008
From: alexelder at gmail.com (alexelder at gmail.com)
Date: Mon, 5 May 2008 03:47:51 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <7b6965a2-193d-42cf-8fad-2ad97c8de27b@i76g2000hsf.googlegroups.com>
Message-ID: <7aadfbc6-f42a-4c63-91a2-a90acf9376af@r66g2000hsg.googlegroups.com>

On May 5, 10:25 am, n00m <n... at narod.ru> wrote:
> os:windows
> ml = 'line1 \n line2 \n line3 \n'
> exec('some.exe "' + ml + '"')
>
> and some.exe get only 'line1'...

I think your problem lies with your "\n", escape chars. Assuming these
are not arguments and are indeed separating statements, I suggest
replacing "\n", with "&". That way, the command shell probably wont
complain.

An example:
ml = 'line1 & line2 & line3'

Alex.


From martin at v.loewis.de  Sun May 25 23:28:33 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 26 May 2008 05:28:33 +0200
Subject: set partition question
In-Reply-To: <3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
Message-ID: <483a2e61$0$21475$9b622d9e@news.freenet.de>

> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...), arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any of python's set operations
> or combination of those operations.

That still allows for trivial solutions:

Given s0, and s1..sn, the following Python code outputs a Python
fragment that, when run, returns s0:

print "set()",
for e in s0:
    print ".union(set([%s]))" % repr(e),

For s0=set([1,2,3]), I get

set() .union(set([1])) .union(set([2])) .union(set([3]))

Or, more trivially,

print repr(s0)

which gives me

set([1,2,3])

In either case, s0 is generated through "any of python's set
operations".

Regards,
Martin


From sjmachin at lexicon.net  Sun May 11 01:04:05 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 22:04:05 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com>
Message-ID: <da405010-4318-4f3e-9f33-001a4edcb662@k10g2000prm.googlegroups.com>

On May 11, 1:24 pm, Mensanator <mensana... at aol.com> wrote:
> On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Define better.
>
> >>> f = ['','','Fizz']*100
> >>> b = ['','','','','Buzz']*100
> >>> for i in xrange(1,100):
>
>         fb = f[i-1]+b[i-1]
>         if fb=='':
>                 print i
>         else:
>                 print fb

You seem to have an unfortunate fixation on 100. Consider changing the
above instances to 34, 20, and 101.


From half.italian at gmail.com  Thu May  1 21:17:37 2008
From: half.italian at gmail.com (Sean DiZazzo)
Date: Thu, 1 May 2008 18:17:37 -0700 (PDT)
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and 
	'NoneType'
References: <mailman.440.1209688547.12834.python-list@python.org>
Message-ID: <ba8ea819-82f5-4cac-82ed-f77ebb6ef35a@q24g2000prf.googlegroups.com>

On May 1, 5:21?pm, "Jordan Harry" <jha... at EmeryWeiner.org> wrote:
> I'm trying to write a simple program to calculate permutations. ?I created a file called "mod.py" and put the following in it:
>
> def factorial(n):
> ? ? a = n
> ? ? b = n
> ? ? while a>0 and b>1:
> ? ? ? ? n = (n)*(b-1)
> ? ? ? ? b = b-1
>
> def perm(n, r):
> ? ? a = factorial(n)
> ? ? b = factorial(n-r)
> ? ? q = a / b
> ? ? print q
>
> Then I went back to IDLE and input the following:
>
> >>> import mod
> >>> mod.perm(5, 4)
>
> I recieved the following error message:
>
> Traceback (most recent call last):
> ? File "<pyshell#1>", line 1, in <module>
> ? ? mod.perm(5, 4)
> ? File "C:\Python25\mod.py", line 27, in perm
> ? ? q = a / b
> TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'
>
> I have no idea how to fix it. ?I'm pretty new to Python. ?I have IDLE 1.2.2 and Python 2.5.2,
>
> Please help.

Your factorial function needs to return something.

~Sean


From cokofreedom at gmail.com  Wed May 21 09:28:35 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 06:28:35 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>

On May 21, 3:12 pm, "boblat... at googlemail.com"
<boblat... at googlemail.com> wrote:
> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
> > Although that solution is pretty, it is not the canonical solution
> > because it doesn't cover the important case of "if" bodies needing to
> > access common variables in the enclosing scope.  (This will be easier
> > in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
> > IMHO closer to a canonical solution to this FAQ.
>
> Hello everybody,
>
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.
>
> Thanks again,
> robert
>
> PS: Since I'm testing only three REs, and I only need the match
> results from one of them, I just re-evaluate that one.

Is it really a lot to change to have it

if my_re1.match(line):
  match = my_re1.match(line)
elseif my_re2.match(line):
  match = my_re2.match(line)
elseif my_re3.match(line):
  match = my_re3.match(line)

?

That reads clearly to me...


From srinivas.puvvala at gmail.com  Wed May 21 08:31:50 2008
From: srinivas.puvvala at gmail.com (srinivas)
Date: Wed, 21 May 2008 05:31:50 -0700 (PDT)
Subject: about python modules
Message-ID: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>

hi friends i am new to python programming.
i am using Python 2.5 and IDLE as editor.
i have developed some functions in python those will be calling
frequently in my main method .
now i want to know how to import my functions folder to python in
sucha way that the functions in functions folder should work like
python library modules .

i have  python in folder C:\python25\..
and functions folder D:\programs\Functions\

pls help me friends how to do that.


From notnorwegian at yahoo.se  Mon May 19 23:34:22 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 20:34:22 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
Message-ID: <3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>

i am confused.

x=5
y=5

x==y -> True
x is y -> True

shouldnt x is y return False since they shouldnt(dont?) point to the
same place in memory, they just store an equal value?



From ivan.illarionov at gmail.com  Tue May 13 00:22:52 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 04:22:52 +0000 (UTC)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>
Message-ID: <g0b52s$53r$1@news.mtu.ru>

On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:

> On May 12, 11:02?pm, Jimmy <mcknight0... at gmail.com> wrote:
>> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>>
>>
>>
>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
>> > wrote:
>> > > Well, i know it may be a little non-python thing, however, I can
>> > > think
>> > > ?of no place better to post this question :)
>>
>> > > ?can anyone tell me, in python, how to obtain some information of
>> > > ?a running program?
>> > > ?paticularly, if i am playing some music in audacious or other
>> > > ?media player, how can i get the the name and some other info of
>> > > ?current playing song? It seems that audicious doesn't output on
>> > > ?run-time --
>> > > ?http://mail.python.org/mailman/listinfo/python-list
>>
>> > In most cases, you'll probably need some sort of API, either in the
>> > program itself or through some sort of plugin, that lets external
>> > programs query it. ?For instance, there are some plugins to WinAmp
>> > that allow external programs (like Last.FM or Mog-O-Matic) to see
>> > what track is currently playing. ?You may also be able to do
>> > something like get the window title (again, WinAmp's title bar
>> > usually includes the artist and title) and parse it out. ?I don't
>> > really know that there's anything specific to Python for accessing
>> > these though, and it may vary depending on media player.
>>
>> > Just my two cents...
>>
>> > -dan
>>
>> thanks!
>>
>> In linux, I am always obfuscated by sort of APIs. Like how to get title
>> information of a running program? where am I supposed to find these
>> APIs
> 
> I think you're a little confused about how computers work in general and
> what a program can do, and you expect there is some general superprogram
> able to decipher what an arbitrary other running program does. The
> sentence "how to get title information of a running program" doesn't
> even make sense for most programs since they don't play music anyway.
> 
> Your best bet is if the *specific* program you're interested in (e.g.
> audacious) exposes this information programmatically in some way. It's
> up to the developers of this application if and how they choose to do
> it. Even if they do it, there's no requirement that the same API will
> work for any other program of the same category, unless there is some
> popular industry standard that most applications implement.
> 
> In short, you'll get more helpful replies at the audacious newsgroup.
> 
> HTH,
> George

George, have you read my post in this thread? What OP wants is actually 
possible and it's quite easy. X server is the "superprogram" that knows 
the names of all GUI window titles.

-- Ivan


From iainking at gmail.com  Tue May 13 10:06:07 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 07:06:07 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>
	<46508224-d4c6-4982-a29f-04d29b3d5a2c@m36g2000hse.googlegroups.com>
Message-ID: <7f058ac1-e3e9-4d56-adf5-45ccc105f078@z72g2000hsb.googlegroups.com>

On May 13, 2:43 pm, Iain King <iaink... at gmail.com> wrote:
> On May 13, 2:20 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>
>
>
> > Iain King wrote:
> > > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > > up a file selector.  This all works fine, but the first thing the user
> > > has to do when they open the dialog is select a file, so I would like
> > > the dialog to automatically call the onBrowse function as soon as the
> > > dialog opens.  However, I don't know how to do this.
>
> > > dlg.ShowModal()
> > > onBrowse()
>
> > > obviously doesn't work, and neither does the reverse.  I was hoping
> > > that the dialog would throw some kind of "I have been shown" event,
> > > but it doesn't (as far as I can tell).  How do I make the dialog do
> > > something as soon as it's been shown?
>
> > > Iain
>
> > If the only things on your modal dialog are Browse and cancel, just call the
> > wx.FileDialog directly and eliminate the intermediate modal dialog.  If not
> > don't bind the FileDialog to a button, just create an instance of it as the last
> >   you do in the __init__ method of the modal dialog code.
>
> > If this doesn't help, you will have better luck posting to wxpython newsgroup.
>
> > -Larry
>
> The dialog doesn't only let you call the file dialog, it does other
> stuff too.  Your suggestion of __init__ sounded promising, but neither
> giving the dialog an __init__() method nor an OnInit() method worked.
> Thanks anyway.
>
> Iain

After having a hunt through the wxpython mailing list archives I found
the answer:  the event is EVT_INIT_DIALOG:

dlg.Bind(wx.EVT_INIT_DIALOG, onInit, dlg)

work.  Thanks for the pointer.

Iain


From oyinbo55 at gmail.com  Sun May  4 08:42:48 2008
From: oyinbo55 at gmail.com (oyinbo55)
Date: Sun, 4 May 2008 05:42:48 -0700 (PDT)
Subject: matplotlib pylab plot() BadWindow error
Message-ID: <16f10cf9-a966-4492-891b-d6aedb9ad428@p25g2000hsf.googlegroups.com>

I am trying to use the pylab plot command on my laptop running Ubuntu
6.06 (Dapper).  Although the plot command works fine on my XP desktop
at work, I cannot open the plot window on the laptop.  I edited
matplotlibrc to change interactive: to "True".  In idle, I entered the
commands:
     >>> from pylab import *
     >>> plot([1,2,3])

The terminal window closed abruptly when I typed the closing
parenthesis.
I have been warned not to use the show() command in interactive mode.
I tried:
     oyinbo at oyinbo-laptop:~$ idle-python2.4 -n
In idle -n, I entered the sam two commands.  This time I got an error
message:
     The program 'idle-python2.4' received an X Window System error.
     This probably reflects a bug in the program.
     The error was 'BadWindow (invalid Window parameter)'.
       (Details: serial 2875 error_code 3 request_code 15 minor_code
0)
       (Note to programmers: normally, X errors are reported
asynchronously;
       that is, you will receive the error a while after causing it.
       To debug your program, run it with the --sync command line
       option to change this behavior. You can then get a meaningful
       backtrace from your debugger if you break on the gdk_x_error()
function.)

Using the Python prompt without idle, I got no error message, but the
window simply didn't open:

     oyinbo at oyinbo-laptop:~$ python
     Python 2.4.3 (#2, Mar  7 2008, 01:58:20)
     [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
     Type "help", "copyright", "credits" or "license" for more
information.
     >>> from pylab import *
     >>> plot([1,2,3])
     [<matplotlib.lines.Line2D instance at 0xb7bf04cc>]

Have I skipped a step?

Thanks for all the great information on your group.

Bill


From not_here at no_where.com  Sun May 18 20:56:30 2008
From: not_here at no_where.com (Brian)
Date: Sun, 18 May 2008 17:56:30 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <1f4Yj.60053$Fc1.23579@newsfe07.phx>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.

here is some non-text stuff that I have done within the 
  last two or three years

1. controlling and parsing thousands of label files 
several times per day, that are used by the factory to 
drive the printers that make product safety labels - 
code was easily approved by UL and CSA.
2. real-time control of platform in EMC lab for 
radiated emissions testing.
3. hi-speed data acquisition of 3 to 20 parameters 
during simulated abnormal operating conditions to 
demonstrate product compliance with product safety 
standards.
4. monitoring of several server logs, also sends email 
to me if it finds something it does not like.
5. parallel monitor/control systems for several 
greenhouses.


From mnikhil at gmail.com  Tue May 20 13:30:09 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:00:09 +0530
Subject: AttributeError: module object has no attribute
Message-ID: <g0v1r3$ikn$1@registered.motzarella.org>

I have recently written a small module. When I import the module, I 
always get the error


only when I do

 >>> from local.my.module import *

--
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute '/xyz/py/file'
---


but when I do the below, I do not get any error.

--
 >> import local.my.module
 >>
--

Any ideas on what could be wrong?


Thanks in advance.

Nikhil


From mccredie at gmail.com  Fri May  2 02:17:08 2008
From: mccredie at gmail.com (Matimus)
Date: Thu, 1 May 2008 23:17:08 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com> 
	<dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>
Message-ID: <7917a0b4-7af2-46f0-adec-33d3b191eb17@y22g2000prd.googlegroups.com>

On May 1, 10:50 pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 1, 11:46 pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
>
>
>
> > Yves Dorfsman wrote:
>
> > > In the following script, m1() and m2() work fine. I am assuming m2() is
> > > faster although I haven't checked that (loops through the list twice
> > > instead of once).
>
> > Well, let's check it:
>
> > $ python -m timeit -s "import x" "x.m1()"
> > 100000 loops, best of 3: 6.43 usec per loop
>
> > $ python -m timeit -s "import x" "x.m2()"
> > 100000 loops, best of 3: 8.34 usec per loop
>
> > As it turns out, m1 is faster than m2. The reason is that list
> > comprehensions do the loop in C, whereas the for-append pattern does the
> > loop on the Python level.
>
> > > Now what I am trying to do is something like m3(). As currently written
> > > it does not work, and I have tried different ways, but I haven't managed
> > > to make it work.
>
> > > Is there a possibility ? Or is m2() the optimum ?
>
> > > [...]
> > > def m1():
> > >   colours = [ e['colour'] for e in l ]
> > >   nums    = [ e['num']    for e in l ]
>
> > > def m2():
> > >   colours = []
> > >   nums    = []
> > >   for e in l:
> > >     colours.append(e['colour'])
> > >     nums.append(e['num'])
>
> > > #def m3():
> > > #  colours, nums = [ e['colour'], e['num'] for e in l ]
>
> > m3 doesn't work because you're building a list of 10 color/number pairs
> > that you're trying to unpack that into just two names. The working
> > "derivative" of m3 is m1, which is the most natural, fastest and
> > clearest solution to your problem.
>
> Another alternative is:
>
> from operator import itemgetter
>
> def m3():
>     colours, nums = zip(*map(itemgetter('colour','num'), l))
>
> It's slower than m1() but faster than m2(); it's also the most
> concise, especially if you extract more than two keys.
>
> George

Why deal with zip and unpacking? This seems more obvious to me:

colours, nums = map(itemgetter('colour'), l), map(itemgetter('num'),
l)

Matt


From jstucklex at attglobal.net  Mon May 26 19:42:20 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Mon, 26 May 2008 19:42:20 -0400
Subject: php vs python
In-Reply-To: <5IH_j.3432$tF1.2671@trnddc01>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com> <5IH_j.3432$tF1.2671@trnddc01>
Message-ID: <k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>

Curtis wrote:
> Paul Rubin wrote:
>> notbob <notbob at nothome.com> writes:
>>> Well, that's my actual question, then.  Is php really so bad I'm just
>>> wasting my time?  Or is it really the quickest way to blog 
>>> functionality?
>>
>> php is very easy to get started with and some big sites have been
>> written in it.  There is lots of low cost php hosting available.  It
>> is not as good a language as Python.  However, Python's advantages are
>> strongest in more complex projects.  For simple stuff, php is frankly
>> less hassle just because of its wide deployment and that extensive
>> function library that the blog post your quoted described as a bad
>> thing.  Python's libraries are not bad, but php's are more intensely
>> focused on web apps and includes what you need as part of the standard
>> build.  With Python, if you want a database adapter or web template
>> framework, you have to choose between a bunch of different ones and
>> download and configure it which often involves head scratching when
>> the auto-install stuff hits some quirk of your system.  With php, it's
>> all right there when you flip the switch.
>>
>> Knowing lots of languages is good for you.  php is probably your
>> quickest route to getting a rudimentary web app running.  Python
>> is a longer term project.  Do both.
> 
> PHP is more than capable for handling large projects, not just small 
> scripting jobs. However, Paul's right about PHP being more driven toward 
> web development, where as Python may be better for different types of apps.
> 
> Even then, I think your first reply was best, it just comes down to what 
> you have more fun writing. Both languages are equally capable of getting 
> the job done.
> 
> -- 
> Curtis

Not true.  PHP is quite capable of writing large, non-web based 
projects.  While it's non-browser based display capabilities are 
somewhat lacking (although there are third party libraries which help a 
lot), I've written some pretty complicated batch scripts in the past.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From rajarshi.guha at gmail.com  Wed May 14 12:13:42 2008
From: rajarshi.guha at gmail.com (Rajarshi)
Date: Wed, 14 May 2008 09:13:42 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <4ba3a7d9-19a8-4463-981c-dea90ee085fc@24g2000hsh.googlegroups.com>

Thanks to the all posters. This will be very useful!


From p.wallstedt at gmail.com  Thu May 15 11:03:40 2008
From: p.wallstedt at gmail.com (p.wallstedt at gmail.com)
Date: Thu, 15 May 2008 08:03:40 -0700 (PDT)
Subject: pyserial and file open conflict?
Message-ID: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>

Hi all!

I have a small but rather annoying problem with pyserial. I want to
open a file on disk for reading and then open a com-port, write lines
from the file to the port and then read something back and compare it
to the next line in the file. Should be simple. And it is, apart from
the fact that the file seems to be doubled ...? Or it loops through
the file twice.

If I exclude the "import serial" it works.

Any ideas?

thanks
Peter


From duncan.booth at invalid.invalid  Thu May  8 03:56:12 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 07:56:12 GMT
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
Message-ID: <Xns9A985A46AEA62duncanbooth@127.0.0.1>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> 
> 
> George Sakkis wrote:
>> One of the few Python constructs that feels less elegant than
>> necessary to me is the del statement. For one thing, it is overloaded
>> to mean three different things:
>> (1) del x: Remove x from the current namespace
>> (2) del x[i]: Equivalent to x.__delitem__(i)
>> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
> 
> Note that the 'X = Y' construct has the corresponding three meanings:
> 
> (1) x = 4 # Bind x to 4 in the 'current namespace'
> (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
> (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)

I think you both missed a case:

  (1b) global x; del x    # Remove x from global namespace
  (1b) global x; x = 4    # Bind x to 4 in the global namespace

> What conclusion should we draw from that?

That Python is simple and consistent.


From malaclypse2 at gmail.com  Mon May 12 16:33:05 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Mon, 12 May 2008 16:33:05 -0400
Subject: thread stomp?
In-Reply-To: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
References: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>
Message-ID: <16651e80805121333y3e132ef0h6badc3ad492f55f@mail.gmail.com>

On Mon, May 12, 2008 at 4:00 PM, pyn3wb <pyn3wb at pyn3wb.com> wrote:
>  class main

Why are you making main a class?  It should almost certainly be a
function (defined with "def", not "class").

>         for i in dircache.listdir(dir):
>                 //run over files
>                 class1(dir).start()

You've started a bunch of threads.  If you want to wait for them to
all finish, you need to call .join() on them all.  You can't do that
unless you save references to your threads, like this:

threads = []
for i in dircache.listdir(dir):
    new_thread = class1(dir)
    new_thread.start()
    threads.append(new_thread)

for thread in threads:
    thread.join()

Beyond that, the code you've posted is not correct.  You've left off a
required ":"  in your definition of class main, and your comments are
not valid python comments.  Your for loops don't make a whole lot of
sense to me either.  Are they supposed to be iterating across files in
a directory?  If so, why do you start up all of your threads with
"dir" instead of "i" or "j" as the parameter to your new thread?

-- 
Jerry


From fuzzyman at gmail.com  Sat May 24 09:24:27 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 06:24:27 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
Message-ID: <af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>

On May 23, 10:36 am, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> Some time ago I asked whether is would be possible that unittest would
> perform the test in order of appearence in the file.
>
> The answers seemed to be negative. Since I really would like this
> behaviour I took the trouble of looking throught the source and
> I think I found a minor way to get this behaviour.
>
> Now my questions are:
>
> Are other people interrested in this behaviour?
> Does the following patch has a chance of being introduced in the
> standard python distribution?
>
> *** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
> --- unittest.py 2008-05-23 11:19:57.000000000 +0200
> ***************
> *** 570,575 ****
> --- 570,577 ----
>           """
>           def isTestMethod(attrname, testCaseClass=testCaseClass, prefix=self.testMethodPrefix):
>               return attrname.startswith(prefix) and callable(getattr(testCaseClass, attrname))
> +         def getlinenr(name):
> +             return getattr(testCaseClass, name).im_func.func_code.co_firstlineno
>           testFnNames = filter(isTestMethod, dir(testCaseClass))
>           for baseclass in testCaseClass.__bases__:
>               for testFnName in self.getTestCaseNames(baseclass):
> ***************
> *** 577,582 ****
> --- 579,586 ----
>                       testFnNames.append(testFnName)
>           if self.sortTestMethodsUsing:
>               testFnNames.sort(self.sortTestMethodsUsing)
> +         else:
> +             testFnNames.sort(key=getlinenr)
>           return testFnNames


I second Roy's appreciation with you going to the trouble to post a
patch. There is another problem with your code though, it is dependent
on the CPython implementation. Currently unittest works *great* with
IronPython, which your code wouldn't.

Also, like others, I have had wonderful experiences of trying to track
down test failures that depend on the order that tests run in. Having
interdependencies between tests is a recipe for madness...

Michael Foord
http://www.ironpythoninaction.com/


From cokofreedom at gmail.com  Wed May 21 10:28:17 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 07:28:17 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
Message-ID: <4540a28e-59b4-4903-8c93-6239eb257c1f@j22g2000hsf.googlegroups.com>

On May 21, 4:09 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> cokofree... at gmail.com wrote:
>
> >> And wastes time. regular expressions can become expensive to match -
> >> doing it twice might be hurtful.
>
> >> Diez
>
> > match = (my_re1.match(line) or my_re2.match(line)) or
> > my_re3.match(line)
>
> How do you know *which* of the three has matched then?
>
> Diez

Depends if the OP wants to know that...


From duncan.booth at invalid.invalid  Wed May 28 09:52:34 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 28 May 2008 13:52:34 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
Message-ID: <Xns9AAC974ABFB89duncanbooth@127.0.0.1>

Dave Parker <daveparker at flamingthunder.com> wrote:

> Catch also gives you a
> single, uniform, syntactically unambiguous way to embed statements (or
> whole statement lists) into expressions -- without causing the
> syntactic problems of = statements in if statements or the obfuscation
> of question mark notation, etc.  For example:
> 
> If catch(set x to y+z.) < 0.1 then go to tinyanswer.
> 
So what does this do exactly if the set throws an error? Is the error 
message printed at the top level going to be telling you about the failed 
addition or the failed comparison? Why do you need the catch anyway, if a 
statement is just an expression why can't you just put the statement into 
parentheses?

For that matter, is there any way to distinguish between different errors 
and only catch particular ones? A bare except clause in Python is usually a 
signal of bad code: when handling errors you only want the errors you have 
anticipated, and want to be sure that any unexpected errors don't get 
caught.

You have a great opportunity to avoid making some of the same mistakes that 
Python is trying to get out of. For example as of Python 2.5 
KeyboardInterrupt and SystemExit to longer inherit from Exception. That 
means a bare except in Python no longer catches either of those: if you 
want to handle either of these exceptions you have to be explicit about it.


-- 
Duncan Booth http://kupuguy.blogspot.com


From tavares at fe.up.pt  Thu May  1 11:49:28 2008
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: Thu, 1 May 2008 08:49:28 -0700 (PDT)
Subject: =?windows-1252?Q?Symposium_=93Image_Processing_and_Analysis=94_within?=
	=?windows-1252?Q?_the_ICCES=2709_Thailand_=2D_Announce_=26_Call_for_Papers?=
Message-ID: <0d0443f2-0881-4063-a983-04d72223a589@56g2000hsm.googlegroups.com>

(Our apologies for cross-posting.
We appreciate if you kindly distribute this information by your co-
workers and colleagues.)

**********************************************************************************************************************

Symposium ?Image Processing and Analysis?
International Conference on Computational & Experimental Engineering
and Sciences 2009 (ICCES'09)
Phuket, Thailand, 8-13 April 2009
http://icces.org/cgi-bin/ices09/pages/index

**********************************************************************************************************************

Dear Colleague,

Within the International Conference on Computational & Experimental
Engineering and Sciences 2009 (ICCES'09), to be held in Phuket,
Thailand, in 8-13 April 2009, we are organizing the Symposium ?Image
Processing and Analysis?.
Examples of some topics that will be considered in that symposium are:
Image restoring, Description, Compression, Segmentation and
Description; Objects tracking, Matching, Reconstruction and
Registration; Visualization Enhance; Simulation and Animation;
Software Development for Image Processing and Analysis; Grid Computing
in Image Processing and Analysis; Applications of Image Processing and
Analysis.

Due to your research activities in those fields, we would like to
invite you to submit your work and participate in the Symposium ?Image
Processing and Analysis?.

For instructions and submission, please access to the conference
website at: http://icces.org/cgi-bin/ices09/pages/index.
Please note, when submitting your work you should choose the Symposium
?Image Processing and Analysis?.

Important dates and Instructions:

- 15 Oct 2008: Start abstract submission;
- 1 Jan 2009: Deadline for abstract submission;
- 10 Jan 2009: End of abstract selection.
If you intend to submit your work please notify as soon as possible
the main organizer of your intention (tavares at fe.up.pt);
Instructions for authors are available at: http://icces.org/cgi-bin/ices09/pages/guide.


With kind regards,
Yours sincerely,

The Organizers,

Jo?o Manuel R. S. Tavares (tavares at fe.up.pt) (main organizer)
Faculty of Engineering of University of Porto, Porto, Portugal
Yongjie (Jessica) Zhan (jessicaz at andrew.cmu.edu)
Department of Mechanical Engineering, Carnegie Mellon University,
Pittsburgh, USA
Maria Jo?o M. Vasconcelos (maria.vasconcelos at fe.up.pt)
Faculty of Engineering of University of Porto, Porto, Portugal


From nagle at animats.com  Thu May 22 16:07:58 2008
From: nagle at animats.com (John Nagle)
Date: Thu, 22 May 2008 13:07:58 -0700
Subject: Using MySQLdb to select into the local file
In-Reply-To: <g14gk0$ntt$1@registered.motzarella.org>
References: <g14gk0$ntt$1@registered.motzarella.org>
Message-ID: <4835cf41$0$34536$742ec2ed@news.sonic.net>

Nikhil wrote:
> I am using the MySQLdb python module. I have a table named 'testing' 
> with few columns, under the 'test' database, what is hosted on a remote 
> mysql server.
> 
> I want to run the following query to get a comma-separated information 
> from the table
> 
> 
> LOCK TABLES foo READ;
> SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
>   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
>   LINES TERMINATED BY '\n'
>   FROM 'testing'
> UNLOCK TABLES;
> 
> ..the query is running fine, but what I am noticing is /tmp/result.txt 
> is getting created locally on a mysqld running machine but not on the 
> client(python program) using the MySQLdb module.

     Unfortunately, while there is LOAD DATA LOCAL INFILE, which
reads a file on the client, there is no SELECT INTO LOCAL OUTFILE.

     Actually, you probably want to turn off the FILE privilege
for your MySQL.  That blocks LOAD DATA INFILE and SELECT INTO
OUTFILE, generally considered a good idea because those commands can
access arbitrary file names.

     Also, if you're still using LOCK TABLES and UNLOCK TABLES,
read up on InnoDB and transactions.

     Typically, you do something like this:

import MySQLdb
import csv

def writedb(db, filename) :
	try :
		outcsv = csv.writer(filename)	# output object for CSV
		cursor = db.cursor()									cursor.execute("SELECT a,b,a+b FROM testing")	
		while True :			# do all rows
			row = cursor.fetchone()	# get a tuple for one row
			if row is None :	# if end of rows
				break		# done
			outcsv.writerow(row)	# write row in CSV format
		db.commit()			# release locks

	except MySQLdb.OperationalError, message:
		print "Database trouble: ", message # handle any db problems
		raise				# reraise exception


hostname="???"					# fill in appropriately
user="???"
password="???"
db = MySQLdb.connect(host=hostname, 		# open database
	user=username, passwd=password, db=databasename)

writedb(db, '/tmp/result.txt')			# do it

===============

   Note that this is ASCII-oriented; if you Unicode, you need
extra params to "connect".  Also, the CSV module doesn't do
Unicode well as yet.  Make sure the "outcsv" object
goes out of scope before you try to read the file, so the
file gets flushed and closed.

					John Nagle


From alex.m.gusarov at gmail.com  Mon May 26 02:21:16 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 13:21:16 +0700
Subject: PYQT- How to prevent a dialog being resized in qtdesigner
In-Reply-To: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>
References: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>
Message-ID: <ac6dcb3d0805252321r20bbd2aeif108a9a0fad16c41@mail.gmail.com>

There is no simple way to do it. But it seems to be a meaningless - resizing
dialog in Designer is equal to changing its geometry.


On Mon, May 26, 2008 at 9:30 AM, bbmerong <dmkim at mktec.co.kr> wrote:

> I have a question about qtdesigner.
>
> I'd like to know how to prevent a dialog being resized in qtdesigner.
>
> I'll wait for your answer.
>
> Then, Thank you in advance.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From jeffober at gmail.com  Fri May  2 15:47:15 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:47:15 -0700 (PDT)
Subject: Python and SOAP status
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com> 
	<L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>

Twisted has SOAP support.


From bockman at virgilio.it  Mon May 12 03:55:25 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Mon, 12 May 2008 00:55:25 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
Message-ID: <e6c623cf-73b7-4ebc-bd68-43f778fac53d@b64g2000hsa.googlegroups.com>

On 12 Mag, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se> escribi?:
>
>
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
> The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.
>
> (We used this question last year - some people gave a sensible answer in less than 5 minutes, but others did not even know how to start)
>
> --
> Gabriel Genellina- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

As a test, I would leave out the last sentence, and see how many
people (and how fast) figure out than a number can be multiple of
three _and_ five and that the requirement is somehow incomplete ...

Ciao
-----
FB


From john106henry at hotmail.com  Tue May 13 20:22:59 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 17:22:59 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<mailman.1074.1210711800.12834.python-list@python.org>
	<7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
	<mailman.1086.1210718554.12834.python-list@python.org>
Message-ID: <ef03b353-00f1-4cd6-acaf-9a8639aa1c3b@z16g2000prn.googlegroups.com>

On May 13, 3:42 pm, Gary Herron <gher... at islandtraining.com> wrote:
> John Henry wrote:
> > On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
>
> >> John Henry wrote:
>
> >>> Hi list,
>
> >>> I can't understand this.  The following import statement works fine:
>
> >>>     from PythonCard.templates.dialogs import runOptionsDialog
>
> >>> but this one fails:
>
> >>>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> >> This kind of "dotted" name import only works for packages, and a
> >> directory is considered a package only if it contains a file name
> >> __init__.py.    Looking around my installation of PythonCard (on Linux)
> >> I see that most of those directories *do NOT* have a __init__.py, so
> >> they are not packages and cannot be imported that way.
>
> >> Of course this leaves unanswered the question of *how* you are supposed
> >> to import that code.   I've never used PythonCard so I can't help
> >> further, but I suggest looking at the documentation and examples
> >> supplied.  And perhaps waiting for someone with experience with
> >> PythonCard to answer.
>
> >> Gary Herron
>
> >> P.S. It is usually a waste of time to tell us that something fails
> >> without telling us *how* it fails.  (Cut and paste the error message
> >> always, and the traceback usually.)  If you don't, you will usually get
> >> a request to supply that information, and then have wast3ed the time for
> >> one full round of message to the group.  Even in this case, I'm only
> >> guessing how it failed for you.
>
> >>> I've checked and rechecked to make sure that the spellings are proper
> >>> and that the tools, the codeEditor directory, and codeEditor.py, and
> >>> the class CodeEditor all exists and yet idle keep complaining that it
> >>> can't import from PythonCard.tools.
>
> >>> What's going on?  (Running Python2.5 under WinXP).
>
> >>> Regards,
> >>> --
> >>>http://mail.python.org/mailman/listinfo/python-list
>
> > Thank you very much.  I didn't know about the __init__.py
> > requirement.  Appreciate it.
>
> Actually I should have added that there ways to import such things, and
> PythonCard must be using some such method itself.  You can manipulate
> the sys.path variable, or directly call the import mechanism using the
> builtin __import__, or use a suppled "imp" module.    However, you
> should not have to do any such thing to use PythonCard.  It should do
> them in for you.

I tried to call __import__ directly and didn't work neither.

What I was doing is to invoke their codeEditor directly into my
application.  Their codeEditor was designed to be a stand alone
application and that's why it didn't include the file you cited.

I never quite understood what they were saying about __init__.py but
now I understand.  Learn something new every day.

Thanks again.


From collinyeung at shaw.ca  Tue May 20 21:05:41 2008
From: collinyeung at shaw.ca (Collin)
Date: Wed, 21 May 2008 01:05:41 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <FzKYj.152636$rd2.107869@pd7urf3no>

Dave Parker wrote:
> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

Personally, FT is a bit meh to me. The way you issue your statements I 
always think something is wrong, mainly because when I want to define, 
say, x, in python I'd go:

x = "whatever"

Instantly noting that I defined x. While in Flaming Thunder I'd have to 
type:

Set x to "whatever"

It just feels wrong.


From Magnus.Moraberg at gmail.com  Tue May 27 08:06:53 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 05:06:53 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
	<6a27idF32hqrpU3@mid.uni-berlin.de>
Message-ID: <c0c3ec00-1cbe-40bd-ae92-6fff2d7ae619@34g2000hsf.googlegroups.com>

On 27 Maj, 12:54, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 27 May 2008 03:01:30 -0700, Magnus.Moraberg wrote:
> > I wish to extract all the words on a set of webpages and store them in
> > a large dictionary. I then wish to procuce a list with the most common
> > words for the language under consideration. So, my code below reads
> > the page -
>
> >http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
>
> > a welsh language page. I hope to then establish the 1000 most commonly
> > used words in Welsh. The problem I'm having is that
> > soup.findAll(text=True) is returning the likes of -
>
> > u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
> >www.w3.org/TR/REC-html40/loose.dtd"'
>
> Just extract the text from the body of the document.
>
> body_texts = soup.body(text=True)
>
> > and -
>
> > <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
>
> > Any suggestions how I might overcome this problem?
>
> Ask the BBC to produce HTML that's less buggy.  ;-)
>
> http://validator.w3.org/reports bugs like "'body' tag not allowed here"
> or closing tags without opening ones and so on.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Great, thanks!


From martin at v.loewis.de  Fri May 30 17:33:48 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 30 May 2008 23:33:48 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <g1pgrg$nff$00$1@news.t-online.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<4840407c$0$4845$9b622d9e@news.freenet.de>
	<g1pgrg$nff$00$1@news.t-online.com>
Message-ID: <484072bc$0$27773$9b622d9e@news.freenet.de>

> The function first normalizes the "@" away and then looks for it. Is that
> the expected behaviour?

I believe this functionality is broken by design. Python can't possibly
know correctly what each locale name on each system means, and what
encoding is used in the locale.

Instead, the system's API to find out the encoding should be used,
as exposed in locale.getpreferredencoding().

Regards,
Martin


From grante at visi.com  Tue May 13 13:42:06 2008
From: grante at visi.com (Grant Edwards)
Date: Tue, 13 May 2008 12:42:06 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <SYWdnYoHYaFzT7TVnZ2dnUVZ_sHinZ2d@posted.visi>

On 2008-05-13, Dave Parker <daveparker at flamingthunder.com> wrote:

> And I'll be willing to bet that Flaming Thunder will have OO
> features similar to Python before Python has the features that
> Flaming Thunder already does.

Well, python will definitely never have a name that sounds like
a slang term for happens after you get food poisioning at a
Thai restaurant...

;)

-- 
Grant Edwards                   grante             Yow! Edwin Meese made me
                                  at               wear CORDOVANS!!
                               visi.com            


From pavlovevidence at gmail.com  Mon May 19 22:40:55 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 19 May 2008 19:40:55 -0700 (PDT)
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet> 
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <51dbdc85-b69c-477a-807d-58791870b525@l42g2000hsc.googlegroups.com>

On May 19, 8:47 pm, James A. Donald <jam... at echeque.com> wrote:
> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable, so the interpreter fails to catch typos and name
> collisions.

This factor is scale-neutral.  You can expect the number of such bugs
to be proportional to the lines of code.

It might not scale up well if you engage in poor programming practives
(for example, importing lots of unqualified globals with tiny,
undescriptive names directly into every module's namespace), but if
you do that you have worse problems than accidental name collisions.


> I am inclined to suspect that when a successful small
> python program turns into a large python program, it rapidly reaches
> ninety percent complete, and remains ninety percent complete forever.

Unlike most C++/Java/VB/Whatever programs which finish and ship, and
are never patched or improved or worked on ever again?


> 2.  It is not clear to me how a python web application scales.  Python
> is inherently single threaded,

No it isn't.

It has some limitations in threading, but many programs make good use
of threads nonetheless.  In fact for something like a web app Python's
threading limitations are relatively unimportant, since they tend to
be I/O-bound under heavy load.

[snip rest]


Carl Banks


From gagsl-py2 at yahoo.com.ar  Mon May 12 00:39:14 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 01:39:14 -0300
Subject: Free Memory
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
	<op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<c3f69bf60805102106n524cc6b9qc6c1f5fba0c8ee63@mail.gmail.com>
Message-ID: <op.ua0xvok1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 01:06:13 -0300, Patrick Mullen <saluk64007 at gmail.com> escribi?:

> Yeah I don't know much about locals or globals.  I've never used them
> before, just know they are there.  But anyway, to illustrate what I meant by
> the interesting behavior, here is the output (and sorry for it being so
> long):
>
> IDLE 2.6a2
>>>> globals()
> {'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__',
> '__doc__': None, '__package__': None}
>>>> globals().clear()
>>>> globals()
> {'__builtins__': {'bytearray': <type 'bytearray'>, 'IndexError': <type
     [... long __builtins__ dictionary contents ...]
> 'exceptions.WindowsError'>}}
>>>>
>
> The OP wanted to clear the interpreter and I took a very broad (and highly
> unresearched) stab at it, and saw some behavior that I wasn't expecting.
> So before, all the builtin variables are hidden away in __builtins__, but
> after clearing globals, they are filled into globals.  This doesn't really
> make sense to me, but I don't know much about __builtins__ or globals.

Look more carefully:

py> globals().clear()
py> len(globals())
1
py> globals().keys()
['__builtins__']

globals() contains now a single entry, the namespace of the __builtin__ module (that is, __builtin__.__dict__), not the individual builtin entries (these are the dictionary entries that you posted).
As you later noticed, this happens only on IDLE. I don't know why IDLE behaves that way, but avoid entering "restricted mode" may be a reason (see http://docs.python.org/lib/restricted.html )
Usually, __builtins__ contains a reference to the __builtin__ module itself *only* in __main__; in all other modules, __builtins__ contains a reference to the __builtin__ namespace (like what you got in IDLE after clearing globals). I don't know *why* they are different either.

-- 
Gabriel Genellina



From mccredie at gmail.com  Fri May 23 17:10:51 2008
From: mccredie at gmail.com (Matimus)
Date: Fri, 23 May 2008 14:10:51 -0700 (PDT)
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
Message-ID: <8e4fc264-c19d-4bca-9984-757c0012ce8f@j22g2000hsf.googlegroups.com>

On May 23, 11:59 am, tinn... at isbd.co.uk wrote:
> I'm desperately trying to move a Microsoft Access database application
> (a simple accounts system I wrote myself) to Linux.  Python is one of
> my preferred programming laguages so I wonder if there are any good
> Python 'frameworks' for writing database applications, in particular I
> need good reporting and forms writing facilities.  The basic database
> and logic/arithmetic seem fairly simple to me.
>
> --
> Chris Green

You might look at web frameworks like django or turbo gears. The
tutorials for django jump right into database access, and the default
administrative stuff is robust and pretty simple.

Matt


From bj_666 at gmx.net  Thu May 22 03:07:13 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 May 2008 07:07:13 GMT
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com>
	<4834C05D.6020608@gmail.com>
	<0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>
Message-ID: <69kkd1F33ahahU1@mid.uni-berlin.de>

On Wed, 21 May 2008 17:56:38 -0700, bukzor wrote:

> On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
>
>> if os.path.exists('file'):
>>         open('file', 'w').close()
>>
>> Right?
> 
> You only want to blank it if it exists? If it doesn't exist you won't
> create it.
> The .close() is superlative: since you don't keep the value, it gets
> deallocated and closed by the destructor.

The language neither guarantees *when* an object will be deallocated nor
that its destructor is called *at all*.  It's cleaner to explicitly close
the file.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Tue May 27 10:43:51 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 27 May 2008 07:43:51 -0700 (PDT)
Subject: Creating a web page with Python
References: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>
Message-ID: <e8e4e940-dc6f-4396-be84-561f1a7e87dd@2g2000hsn.googlegroups.com>

On May 27, 9:25?am, subhabrata.i... at hotmail.com wrote:
> Dear Members of the group,
> If any one can help me with an idea how to create a web page with
> python? Do I have to use vbscript or something like that? I also want
> to embed the function in the button of a form. How can I do it in
> Python?
> Regards,
> Subhabrata Banerjee.


There are many ways to do this. You can use Python kind of like cgi:

http://www.python.org/doc/essays/ppt/sd99east/index.htm
http://docs.python.org/lib/module-cgi.html

WSGI: http://www.wsgi.org/wsgi

Web Frameworks: Django, TurboGears, Pylons, mod-python, Zope/Plone

Or you might just want to browse Python's wiki:

http://wiki.python.org/moin/WebProgramming

Mike



From castironpi at gmail.com  Tue May 13 01:52:47 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 22:52:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
Message-ID: <ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>

On May 12, 8:36?pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> On May 12, 7:20?pm, castiro... at gmail.com wrote:
>
> >?Yes, I am trying to visualize something.
>
> If it is related to making furniture comfortable for humans, have you
> considered painting the furniture with thermochromic paint (http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> response to temperature, which in part is determined by how hard a
> body is pressed against it because close contact tends to trap heat.
> An evenly distributed color might indicated evenly distributed
> pressure.

I do hold an argument that one can make too much money for one's own
good quality of life.  Am I trying to visualize thermal (and ergo
possibly chemical too) gradients (thermovoltaic)?  Yes in part.  I'm
pretty generally interested, but where can print layout take you?
Microsales?


From george.sakkis at gmail.com  Thu May  8 01:07:38 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 22:07:38 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <c5c6cea7-4769-467a-968e-71232809b388@x35g2000hsb.googlegroups.com>

On May 7, 11:34?pm, Yves Dorfsman <y... at zioup.com> wrote:

> So would it be a worthy addition to python, to add it right in the core of
> the language, and hopefully in an efficient manner ?

Given that it's a straightforward generalization of the existing
slicing syntax, it sure does make sense from a theoretical standpoint.
Whether it's a worthy addition is debatable though; I don't think
there are many common use cases to convince the core developers to
work on it. OTOH if you (or someone else) comes up with a working
patch, it might improve its chances of getting accepted.

George


From jcd at sdf.lonestar.org  Thu May  8 09:50:03 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 08 May 2008 09:50:03 -0400
Subject: listen on TCP port
In-Reply-To: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>
References: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>
Message-ID: <1210254603.8236.6.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 05:56 -0700, petr.poupa at gmail.com wrote:
> Hello,
> is it possibble listening on TCP port by python and how? I am trying
> chilkat but poorly :(.
> 
> Thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

You just asked this exact same question yesterday, and got a few
responses, none of which are addressed in the post above.  Do neither
twisted nor the socket module work for you?

 





From efurman at admailinc.com  Wed May 21 14:42:00 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Wed, 21 May 2008 10:42:00 -0800
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48340df7$1@news.mel.dft.com.au>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>
	<48340df7$1@news.mel.dft.com.au>
Message-ID: <48346CF8.8070109@admailinc.com>

John Machin wrote:

> Robert Kern wrote:
>
>> Ethan Furman wrote:
>>
>>> Greetings,
>>>
>>> I'm looking at the struct module for binary packing of ints and 
>>> floats.  The documentation refers to C datatypes.  It's been many 
>>> years since I looked at C, but I seem to remember that the data type 
>>> sizes were not fixed -- for example, an int might be two byes on one 
>>> machine, and four bytes on the next.  Can any C programmers verify 
>>> this?  If it is true, does that mean that struct.pack('h', 8001) 
>>> might give me different results depending on the machine it's 
>>> running on?
>>
>>
>> Right. I believe (but could be wrong) that "char" is defined to be 
>> one byte, but that "short", "int", "long", and "long long" are 
>> defined as "at least as big as the previous type".
>>
>> In practice, though, on nearly every machine that Python runs on, 
>> "char" is one byte, "short" is two bytes, and "int" is four bytes. 
>> "longs" and "long longs" tend to vary substantially, though; never 
>> assume sizes for them.
>>
>> Single-precision floats are always four bytes and double-precision 
>> floats are always eight bytes. "long doubles" vary; they could be 
>> twelve bytes or sixteen.
>>
>> If you want to deal with fixed sizes, use struct.calcsize() to test 
>> the sizes of each of the integer types, assign them to width-specific 
>> aliases, and always use these aliases.
>>
>
> This is all true if you want to operate in "native" mode; however in 
> "standard" mode the sizes are fixed -- otherwise there'd be no easy 
> way of reading/writing the fixed-size fields in many common file formats.
>
> As the manual says:
> """
> Native size and alignment are determined using the C compiler's sizeof 
> expression. This is always combined with native byte order.
>
> Standard size and alignment are as follows: no alignment is required 
> for any type (so you have to use pad bytes); short is 2 bytes; int and 
> long are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and 
> double are 32-bit and 64-bit IEEE floating point numbers, respectively.
> """
>
> If, as I suspect, Ethan's purpose is be able to read/write files in a 
> long-established PC file format, he will need to '<' for littleendian 
> order, and an appropriate selection from bBhHiI and d will do what he 
> needs.
>
> HTH,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list

John, you are correct in my purpose, and thank you (and to everyone) for 
the clarification.  It does indeed help a great deal.
--
Ethan



From gherron at islandtraining.com  Thu May 29 11:45:31 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 29 May 2008 08:45:31 -0700
Subject: Tuple of coordinates
In-Reply-To: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <483ECF9B.5090502@islandtraining.com>

victor.herasme at gmail.com wrote:
> Hi,
>
> i am using a software which uses python as its scripting language. I
> want to generate a list of coordinates more or less this way:
>
> for i in (beg, end, step):
>      for j in (beg, end, step):
>           for k in (beg, end, step):
> .........
>
> Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))
>   

Your statement of the problem makes it look like all three coordinates 
cover the same sequence of values.  Is that true? Or does i's range  
(beg, end, step) differ from j's and k's.    If they differ, are they 
all the same length?

You pseudo-code makes it look like you want all combinations, but your 
sample output does not indicate that.  Which is it, [(1,1,1), (2,2,2)] 
or [(1,1,1), (1,1,2),(1,2,1),(1,2,2), ...]?

Depending on the answers to those questions, one of the following list 
comprehensions may demonstrate how to achieve a solution.

 >>> a = range(2,6,2)
 >>> b = range(3,7,2)
 >>> c = range(10,14,2)
 >>> print a,b,c
[2, 4] [3, 5] [10, 12]
 >>> [(i,j,k) for i,j,k in zip(a,b,c)]  #  Using zip process three lists 
in lock-step
[(2, 3, 10), (4, 5, 12)]
 >>> [(i,j,k) for i in a  for j in b  for k in c]   #Nested loop give 
all possible combos.
[(2, 3, 10), (2, 3, 12), (2, 5, 10), (2, 5, 12), (4, 3, 10), (4, 3, 12), 
(4, 5, 10), (4, 5, 12)]
 >>>

Gary Herron

>
> Can anyone give me some advice on how to achieve this ? I got a little
> idea, but still need to keep working til i get it. Thanks in advance,
>
>
> Victor
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From lac at openend.se  Mon May 26 10:36:13 2008
From: lac at openend.se (Laura Creighton)
Date: Mon, 26 May 2008 16:36:13 +0200
Subject: looking for membership management software -- Open Source,
	written in Python
Message-ID: <200805261436.m4QEaDdI026074@theraft.openend.se>


I'm looking for an application that handles the membership of an
organisation -- who's a member, who has paid fees, addressbook and 
the odd added field.

Anybody got one they recommend?

Language does not have to be English -- we're going to have to internationalise
whatever we get in any case.  Of course, if it happens to already speak
various European languages, this will be a big plus.

Thanks in advance,
Laura Creighton


From __peter__ at web.de  Tue May 20 03:08:25 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 09:08:25 +0200
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <g0ttd9$elh$03$1@news.t-online.com>

notnorwegian at yahoo.se wrote:

>  if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:

if all(x == 5 for x in a,b,c,...):
   print "yep"


Peter


From george.sakkis at gmail.com  Thu May  1 21:13:22 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 18:13:22 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
Message-ID: <ebd79f84-5b93-4c54-9271-52799492505e@i76g2000hsf.googlegroups.com>

On May 1, 7:44 pm, NevilleDNZ <neville... at gmail.com> wrote:

> Below is a (flawed) one line RegEx that checks curly brackets (from
> awk/c/python input) are being matched.  Is there a one liner for doing
> this in python?

There is not even a 1000-liner regular expression for this; it's a
context-free language [1], not a regular one [2]. Either do it
manually or use a parser generator [3].

George

[1] http://en.wikipedia.org/wiki/Context-free_language
[2] http://en.wikipedia.org/wiki/Regular_language
[3] http://wiki.python.org/moin/LanguageParsing


From gagsl-py2 at yahoo.com.ar  Sun May 18 12:27:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 13:27:42 -0300
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
Message-ID: <op.ubcyogb9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 12:32:28 -0300, Terry <terry.yinzhe at gmail.com> escribi?:

> On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
>> escribi?:
>>
>> > Is there a simple way to get all the instances of one class? I mean
>> > without any additional change to the class.
>>
>> Try with gc.get_referrers()
>
> But I saw in the help that we should "Avoid using get_referrers() for
> any purpose other than debugging. "

Yes - so what do you want to do actually?

-- 
Gabriel Genellina



From martin at v.loewis.de  Tue May 20 14:48:15 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 20 May 2008 20:48:15 +0200
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
Message-ID: <48331cef$0$32633$9b622d9e@news.freenet.de>

> How do I access the sysctl(3) call from Python on BSD?
> 
> Specifically I want to retrieve:
> 
> $ sysctl -d net.inet.ip.stats
> net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)
> 
> So I'll need some way of getting to struct ipstat from Python as well

At the moment, only through ctypes - if you need to use sysctl(3),
and you'll have to manufacture the layout of struct ipstat yourself.

Regards,
Martin


From jstucklex at attglobal.net  Tue May 27 22:27:40 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 22:27:40 -0400
Subject: php vs python
In-Reply-To: <g1iem8$r5$3@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru>	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
	<g1iem8$r5$3@news.mtu.ru>
Message-ID: <nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>
>>>> Greetings, Ivan Illarionov.
>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>
>>>>>> As I've said before - good programmers can write good code in any
>>>>>> language.
>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>> and easier in another.
>>>> It's obvious lie. If you have clear mind and you know language you're
>>>> using, there are absolutely NOTHING can deny you to write clear code.
>>>> Even using forth postfix notation, I have no problem writing good
>>>> code, it's as easy as writing bad code. And yes, I do see the
>>>> difference.
>>> No. Language does matter.
>> Not for a good programmer.  Only for half-assed ones.
> 
> No. Language does matter

Only to half-assed programmers.  Good programmers can write good code in 
any language they know.

Ever seen good assembler?  It can be done - really!  Also fortran, 
cobol, forth... the list goes on.


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From kw at codebykevin.com  Sat May 10 11:42:29 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:42:29 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.902.1210433160.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
Message-ID: <4825C265.90106@codebykevin.com>

Guilherme Polo wrote:
> 2008/5/10 Zentrader <zentraders at gmail.com>:
>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>> extension for additional widgets, and TkTable and/or TableListWrapper.
>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
> 
> There is also Tile, or Ttk since Tk 8.5, if you are interested in
> extensions too.
> Apparently there are three Tile wrappers now, two are incomplete
> (sorry for saying that):
> 
> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
> of ttk styling, maybe other things and it is not only a ttk wrapper
> (there are other things besides it)
> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
> Treeview, big part of ttk styling and maybe something else.
> 
> And there is also one I'm doing, that I expect to be complete:
> 
> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
> 
> Documentation and samples are still lacking, but I'm working on them.
> And I haven't tested it under Windows, so I invite you all to test it.
> 
> Regards,
> 
I'm the maintainer of Tile.py. It may well be incomplete, as it was 
first developed by Martin Franklin a couple of years ago and I've been 
modifying it as my own needs require.

So you're doing your own implementation of ttk in Tkinter as a Google 
Summer of Code Project? Wonderful! Are you planning on submitting it for 
including in Tkinter's core, as I did? If yours proves to be the better 
implementation I'll gladly withdraw mine, as I'm not sure I have time to 
overhaul it extensively.

I'll follow your progress with interest!

--Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From bearophileHUGS at lycos.com  Sun May  4 07:00:26 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 4 May 2008 04:00:26 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org> 
	<7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>
Message-ID: <c9735621-db58-45a0-b243-1d22651e767f@24g2000hsh.googlegroups.com>

George Sakkis:
> A faster algorithm is to create a 'key' for each word, defined as the
> tuple of ord differences (modulo 26) of consecutive characters.

Very nice solution, it uses the same strategy used to find anagrams,
where keys are
"".join(sorted(word))
Such general strategy to look for a possible invariant key for the
subsets of the required solutions is quite useful.

Bye,
bearophile


From tjreedy at udel.edu  Wed May 21 19:42:28 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 19:42:28 -0400
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65><a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
Message-ID: <g12c11$6di$1@ger.gmane.org>


"Karlo Lozovina" <_karlo_ at _mosor.net_> wrote in message 
news:Xns9AA6FDC59536mosornet at 161.53.160.65...
| Andr? <andre.roberge at gmail.com> wrote in
| news:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com:
|
| > How about something like the following (untested)
| >
| > done = False
| > while not done:
| >   try:
| >      some_function()
| >      done = True
| >   except:
| >      some_function2()
| >      some_function3()
|
| Sure, that works, but I was aiming for something more elegant and 
Pythonic
| ;).

while True:
  try:
    some_function()
    break
  except Exception:
    patchup()

??? 





From timj at tolisgroup.com  Mon May  5 14:32:17 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 11:32:17 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
Message-ID: <0c647f30-3c99-4f3b-b726-4cc74f51abea@a9g2000prl.googlegroups.com>

On May 5, 11:43?am, brucoder <t... at tolisgroup.com> wrote:
> Hi Folks,
>
> Searched the archives, but I can only find mention of db.h problems relating to Linux.
>
> I've downloaded the source for 2.5.2 and am trying to compile it in Visual Studio 6 (SP6).

I've just stepped back to 2.3.7 and receive the same error when
compiling bsddb...

> ?The error reports read:
>
> --------------------Configuration: _bsddb - Win32 Debug--------------------
> Compiling...
> _bsddb.c
> C:\Documents and Settings\Tim\My Documents\Python-2.5.2\Modules\_bsddb.c(90) : fatal error C1083: Cannot open include file: 'db.h':
> No such file or directory
> Error executing cl.exe.
>
> _bsddb_d.pyd - 1 error(s), 0 warning(s)



From Magnus.Moraberg at gmail.com  Tue May 27 05:03:02 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 02:03:02 -0700 (PDT)
Subject: HTTPError sometimes when using urllib2.urlopen
Message-ID: <5978cac5-27e1-40cd-9abe-9e7536395468@d45g2000hsc.googlegroups.com>

Hi,

I have the following code -

import urllib2
from BeautifulSoup import BeautifulSoup

proxy_support = urllib2.ProxyHandler({"http":"http://
999.999.999.999:8080"})
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)

page = urllib2.urlopen('http://www.cornish-language.org/CORNISH/
membership.asp')
soup = BeautifulSoup(page)

pageText = soup.findAll(text=True)
print pageText

Sometimes when I run this code I get the exception -

HTTPError: HTTP Error 407 Proxy authentication required

I seem to get this error repeatidly for a while, then I go a surf for
a moment and when I run the code again the exception might have gone
away. No idea why...

I have no problems with firefox which uses the same proxy. The proxy
requires no authentication...

What might the issue be?

Thanks,

Barry.




From bignose+hates-spam at benfinney.id.au  Mon May 12 02:24:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 16:24:23 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru>
Message-ID: <87iqxk6nvs.fsf@benfinney.id.au>

Ivan Illarionov <ivan.illarionov at gmail.com> writes:

> >> In such cases, the name 'dummy' is conventionally bound to the items
> >> from the iterator, for clarity of purpose
> [..]
> > If a value isn't used, then I think the most clear name for it is
> > "unused".
> [...]
> 
> Maybe my brain works differently, but I find both "dummy" and
> "unused" are extremely confusing names for loop counters. The loop
> begins to look like it doesn't iterate at all if its counter is
> dummy or unused.
> 
> If it *counts* it is *used* and it's *not* dummy.

The value is unused by any of the code inside the block. For the
purposes of that block, it is a dummy value.

That something *else* (the iterator driving the 'for') is taking care
of knowing when the loop is finished is great. However, in the code
the programmer is writing, the loop counter is entirely unused.

> Why reinvent the wheel when "a common identifier naming convention
> is for the loop counter to use the variable names i, j and k (and so
> on if needed)" (from Wikipedia
> http://en.wikipedia.org/wiki/Loop_counter )

That is also regrettably common in Python code. It still suffers from
being unnecessarily ambiguous, since there are *also* plenty of loops
using 'i', 'j', etc. where the loop counter *is* used.

Differentiating these use cases by appropriate naming is, IMO, worth
the effort of choosing a meaningful name.

-- 
 \              "Ignorance more frequently begets confidence than does |
  `\           knowledge." ?Charles Darwin, _The Descent of Man_, 1871 |
_o__)                                                                  |
Ben Finney


From mensanator at aol.com  Tue May 13 18:31:03 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 13 May 2008 15:31:03 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
	<Apb*6NNcs@news.chiark.greenend.org.uk> 
	<482a00a2@news.mel.dft.com.au>
Message-ID: <249560b3-7dd8-4fc1-8c14-11bc98a105ca@c65g2000hsa.googlegroups.com>

On May 13, 3:57?pm, John Machin <sjmac... at lexicon.net> wrote:
> Matthew Woodcraft wrote:
> > Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> >> I would like to write a similar problem without this non-programming ?
> >> distracting issues (that is, a problem simple enough to be answered in a ?
> >> few minutes, that requires only programming skills to be solved, and ?
> >> leaving out any domain-specific knowledge).
>
> > Another reason not to like the FizzBuzz example is that it's quite
> > closely balanced between two reasonable approaches (whether to just
> > special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
> > add the Fizz and the Buzz together in that case). The interviewee might
> > reasonably guess that this distinction is what's being tested, and get
> > unnecessarily stressed about it.
>
> For such a trivial problem, fifteen minutes is more than enough to
> present alternative answers. Perhaps the intention is to weed out those
> who do become unnecessarily stressed in such circumstances. Employers
> like to play tricks to see how interviewees respond e.g. hand over two
> pages of a listing of code in language X, announce that there are 10
> syntax errors, and ask the interviewee to find and circle all the syntax
> errors. Correct answer: 11 circles.

They get away with that?

The one time I was asked to compose a (hardware) test was
because some interviewee threated to sue claiming
discrimination. So I was asked to make an absolutely
trick-free test.

Such as what's the voltage at point A?

    +5v
     |
    220 ohm
     |
     +-- A
     |
    330 ohm
     |
   ground

Would you be surprised at how many applicants couldn't
figure that out because they forgot to bring their
calculator?

Sure, I had a page from a schematic, but only to ask
how one of the shown T-flip-flops worked.

One female interviewee took one glance at the schematic
and said, "Oh, it's a parity generator."

She got hired.

I'm surprised anyone has to resort to tricks.


From larry.bates at websafe.com`  Fri May  9 18:08:22 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 09 May 2008 17:08:22 -0500
Subject: Property in derived class
In-Reply-To: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <VOedncwfMpp5V7nVnZ2dnUVZ_oqhnZ2d@comcast.com>

Joseph Turian wrote:
> If I have a property in a derived class, it is difficult to override
> the get and set functions: the property's function object had early
> binding, whereas the overriden method was bound late.
> This was previously discussed:
>    http://groups.google.com/group/comp.lang.python/browse_thread/thread/e13a1bd46b858dc8/9d32049aad12e1c1?lnk=gst#9d32049aad12e1c1
> 
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?
> 
> Thanks,
>   Joseph

Sounds a little like you are trying to write Java in Python.

1) You don't need get/set functions to get/set properties in Python.  You just
get the property directly using dotted notation.

2) Properties defined in base class exist in derived class unless you override them.


class foobase(object):
   def __init__(self):
     self.myProperty = 1

class foo(foobase):
   self.__init__(self, myProperty=None)
     foobase.__init__(self)
     if myProperty is not None:
       self.myProperty = myProperty


obj = foo()
print obj.myProperty
 >>> 1

obj = foo(6)
print obj.myProperty
 >>> 6

obj.myProperty = 19
print obj.myProperty
 >>> 10

I hope this was what you were looking for.  If not, I don't understand the question.

-Larry


From nagle at animats.com  Wed May 28 00:19:06 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 27 May 2008 21:19:06 -0700
Subject: maximum recursion depth?
In-Reply-To: <4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>
Message-ID: <483cd9e2$0$34570$742ec2ed@news.sonic.net>

alex23 wrote:
> On May 28, 9:26 am, globalrev <skanem... at yahoo.se> wrote:
>> is there a definitie limit to the nbr of calls or is the memory that
>> runs out? is that then the RAMmemory? is there a special amount of
>> memory assigned for python or it just takes and takes until windows
>> runs out of it?
> 
> You can alter the recursion limit using sys.setrecursionlimit:
> 
>     setrecursionlimit(n)
> 
>     Set the maximum depth of the Python interpreter stack to n.  This
>     limit prevents infinite recursion from causing an overflow of the
> C
>     stack and crashing Python.  

    The default is rather low.  I've actually hit it parsing big HTML
files with BeautifulSoup.

					John Nagle


From arnodel at googlemail.com  Tue May 27 16:34:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 27 May 2008 21:34:53 +0100
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
Message-ID: <m2wslf4haq.fsf@googlemail.com>

"Joel Koltner" <zapwireDASHgroups at yahoo.com> writes:

> I have a generic (do nothing) exception class that's coded like this:
>
> class MyError(exceptions.Exception):
>     def __init__(self,args=None):
>         self.args = args
>
> When I attempt to raise this exception via 'raise MyError' I get an
> exception within the MyError constructor __init__ as follows:
>
> Traceback (most recent call last):
> [lines deleted]
>   File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
> MyStuff.py", line 7, in __init__
>     self.args = args
> TypeError: 'NoneType' object is not iterable

That's because the class 'Exception' defines a descriptor 'args' which
has to be a sequence.  Just call 'args' something else, and it will
work.  E.g.

>>> class MyError(Exception):
...     def __init__(self, args=None):
...         self.myargs = args
... 
>>> MyError()
MyError()


OTOH you could just take advantage of Exception.args:

>>> class MyError(Exception): pass
... 
>>> MyError()
MyError()
>>> MyError(1, 2, 3)
MyError(1, 2, 3)

(Details in the documentation are a bit scant, but see
http://docs.python.org/lib/module-exceptions.html)

HTH

-- 
Arnaud


From upton at virginia.edu  Fri May 30 11:01:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 30 May 2008 11:01:19 -0400
Subject: definition of a highlevel language?
In-Reply-To: <80531$483b266d$3799@news.teranews.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
	<mailman.1626.1211831386.12834.python-list@python.org>
	<80531$483b266d$3799@news.teranews.com>
Message-ID: <5504f9ac0805300801w5deb472dy3aed455e3f4747ef@mail.gmail.com>

On Mon, May 26, 2008 at 5:06 PM, Paul Miller <none at this.time> wrote:
> On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:
>
>> On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:
>
>> I don't know if it would necessarily look like the CPython VM, except
>> for the decode stage (this being said without any knowledge of the
>> CPython implementation, but with more than I ever thought I'd know about
>> processor architecture/microarchitecture)
>
> Out of curiosity, do you know how easy it would be to make a Python chip
> using FPGAs?  I have little to no hardware knowledge, but it sounds like
> a fun project in any case.  Even if it's not likely to have blazing
> performance, it'd be cool to load Python bytecode directly into
> memory. :-)
>

I don't really know, but I would guess that it's hard, or at least
time-consuming.  The best example I can give you is "JOP: A Java
Optimized Processor" which was basically an FPGA-based chip that
executed Java bytecode natively.  If you're curious, you can read
about it at http://www.jopdesign.com/ .  It looks like it was done as
a PhD thesis at the Vienna University of Technology, and unless
Austria has significantly lower PhD requirements... ;)


From mensanator at aol.com  Fri May 30 21:02:56 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 30 May 2008 18:02:56 -0700 (PDT)
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com> 
	<mailman.1786.1212191104.12834.python-list@python.org>
	<30b8b4ff-f0e5-4178-b9f7-513a5e404982@z72g2000hsb.googlegroups.com>
Message-ID: <8ce037a7-b09c-40c2-a59c-2dff3d1a9126@34g2000hsh.googlegroups.com>

On May 30, 7:59?pm, Mensanator <mensana... at aol.com> wrote:
> On May 30, 6:44?pm, Joshua Kugler <jkug... at bigfoot.com> wrote:
>
>
>
>
>
> > Skonieczny, Chris wrote:
> > > YOU SHOULD REMOVE or CORRECT YOUR POST here:
> > >http://mail.python.org/pipermail/python-list/2007-February/427841.html
>
> > > It is not true - eg. try :
> > > a='P' ? ? ? ? ? ?# P is ASCII , isn't it ?
> > > b=int(a)
> > > and what you will get ? An error !!!
>
> > > Or probably you yourself should - quote :
> > > "You probably should go through the tutorial ASAP that is located here:
>
> > >http://docs.python.org/tut/"
>
> > int() converts a strings that is a valid intenter. ?What you're looking for
> > is ord().
>
> Possibly. Perhaps the OP wants the position of 'P'
> in the alphabet, in which case he wants b=64-ord(a)
> or b=16.

Oops! I meant ord(a)-64, of course.

>
>
>
>
>
> > In [1]: ord('d')
> > Out[1]: 100
>
> > In [2]: a='P'
>
> > In [3]: b=ord(a)
>
> > In [4]: b
> > Out[4]: 80
>
> > j


From schickb at gmail.com  Mon May 12 23:37:27 2008
From: schickb at gmail.com (schickb)
Date: Mon, 12 May 2008 20:37:27 -0700 (PDT)
Subject: Popen pipe hang
References: <mailman.1012.1210646124.12834.python-list@python.org>
Message-ID: <94c20ca2-57d9-4994-b3db-11ac4bdaeb8d@d19g2000prm.googlegroups.com>

On May 12, 7:35 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >from subprocess import Popen, PIPE
> >from array import array
>
> >arr = array('B')
> >arr.fromstring("hello\n")
>
> >src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
> >dst = Popen( ["cat"], stdin=src.stdout)
> >arr.tofile(src.stdin)
> >src.stdin.close()
> >dst.wait()
>
> Alas, you haven't actually closed src's standard input.  Though you did
> close src.stdin, you didn't close the copy of it which was inherited by
> dst!  So though the file descriptor is no longer open in your main process,
> it remains open due to the reference dst has to it.  You can fix this by
> having Popen close all file descriptors except 0, 1, and 2 before it execs
> cat - pass close_fds=True to the 2nd Popen call and you should get the
> behavior you want.
>

Thanks, that did the trick. Although I assume that by passing
close_fds=True the second Popen is actually closing src.stdout (rather
than src.stdin as mentioned)? With close_fds=True, is Python buffering
the data even though bufsize=0 is the default? Otherwise I don't see
how it could close the fd before executing the process.


From exarkun at divmod.com  Mon May  5 10:34:12 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 10:34:12 -0400
Subject: Nested os.path.join()'s
In-Reply-To: <1209997713.7106.32.camel@paul-laptop>
Message-ID: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>

On Mon, 05 May 2008 16:28:33 +0200, Paul Scott <pscott at uwc.ac.za> wrote:
>
>On Mon, 2008-05-05 at 16:21 +0200, Paul Scott wrote:
>> example:
>>
>> if os.path.exists(os.path.join(basedir,picdir)) == True :
>>     blah blah
>>
>
>Sorry, pasted the wrong example...
>
>Better example:
>
> pics =  glob.glob(os.path.join(os.path.join(basedir,picdir),'*'))
>
>
>> Question is, is there a better way of doing this? The above *works* but
>> it looks kinda hackish...

How about not nesting the calls?

    >>> from os.path import join
    >>> join(join('x', 'y'), 'z') == join('x', 'y', 'z')
    True
    >>>

Jean-Paul


From goldnery at gmail.com  Sat May 24 03:39:06 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 24 May 2008 00:39:06 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com> 
	<57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com> 
	<a99a78e0-8b94-46f7-a7fd-64350b617236@79g2000hsk.googlegroups.com>
Message-ID: <e3ca9bbb-0c23-455d-a6b2-e22b3397a6c1@e53g2000hsa.googlegroups.com>

On May 23, 10:47 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 1:44 pm, Gandalf <goldn... at gmail.com> wrote:
>
> > you've been very helpful but still i have only one problem. I wont the
> > window not to be close after clicking the X button.
> > I wont the program to stay on the toolbar
>
> > thanks!
>
> Well then, in your event handler, just don't do anything.
>
> def onClose(self, event):
>     pass
>
> or maybe you want to hide the frame?
>
> def onClose(self, event):
>     self.frame.Hide()
>
> Just make sure you give the user some other way to close it and in
> that handler, you'll need to call self.frame.Destroy().
>
> Alternatively, you can just tell the frame not to create the "X"
> button:
>
> self.frame = wx.Frame(None, -1, title="My Frame",
> style=wx.SYSTEM_MENU)
>
> However, that makes it pretty annoying to close.
>
> Mike

OK the first method still didn't work. no matter what i do the window
keep closing but the last one worked nice and all the top menu
disappear

thanks!


From sturlamolden at yahoo.no  Tue May 20 13:51:55 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 10:51:55 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<g0u3c9$1fec$3@news.mtu.ru>
	<BqadnXADgL7GlK7VnZ2dnUVZ_gednZ2d@posted.visi>
Message-ID: <7bd9e6b7-840a-4b08-b5d0-c22ca9503c9c@l64g2000hse.googlegroups.com>

On May 20, 7:24 pm, Grant Edwards <gra... at visi.com> wrote:

>
> http://docs.python.org/lib/module-ctypes.html
>

Also see Cython (or Pyrex if you prefer the original). With Cython it
is easy to call C functions, but Cython also alleviates the need for C
to a great extent. The advantage of Cython over C + ctypes is of
course the readability of Python and the presence of Python built-in
types like strings, dicts and lists. Unfortunately, it is still a bit
difficult to use NumPy ndarrays with Cython or Pyrex. NumPy ndarrays
work very well with ctypes though.

http://www.cython.org/












From castironpi at gmail.com  Fri May 16 10:14:57 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:14:57 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<8763tea9sd.fsf@mulj.homelinux.net>
Message-ID: <e4be9248-859c-4645-b615-c04116775289@8g2000hse.googlegroups.com>

On May 16, 4:16 am, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> "??" <littlesweetme... at gmail.com> writes:
> > Howdy,
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> Because the default object class doesn't have a dict or other
> indication of state.  It's a "pure" Python object whose only visible
> properties are its type and its identity.  (On the implementation
> level it also has a refcount.)
>
> This is necessary because all other Python objects (both new-style
> classes and C extensions) inherit from 'object', on the C level.
> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.
>
> Subclassing object instructs Python as to what kind of state you want
> your class to have.  The default is to have a dict to store
> properties:
>
> # a class with dict -- any property goes through dict, and creating a
> # Foo object actually creates two objects, one Foo and one dict
> class Foo(object):
>     pass
>
> But you can also specify:
>
> # an efficient 'Pair' class holding two objects
> class Pair(object):
>     __slots__ = 'first', 'second'
>
> Instances of Pair take up even less room that 2-element tuples
> because they don't carry the size information in the object.
>
> Now, if the object class carried a dict with it, it would be
> impossible to create a class like 'Pair'.
>
> > To make it correct, we have to create a new class:
> > class MyClass(object): pass
> > a = MyClass()
> > a.b = 1       # OK
>
> > Does this strange behavior break the LSP (Liskov substitution
> > principle)?
>
> It follows from LSP that what the subclass may not introduce new
> preconditions.  In this case the subclass accepts a case that the
> original class didn't, so it doesn't introduce a new precondition, it
> simply weakens (removes) an existing one.

Honor and narrow down:

> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.

to:

mass & volume, probably isolating -same-object- and -state-.  No
sinking.


From Scott.Daniels at Acm.Org  Sun May  4 10:58:18 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 04 May 2008 07:58:18 -0700
Subject: Colors for Rows
In-Reply-To: <mailman.342.1209497983.12834.python-list@python.org>
References: <4dc0cfea0804290733ic99e45eyec23a6d5b719eb8@mail.gmail.com>	<20080429121105.f10c3862.darcy@druid.net>	<4dc0cfea0804291114p4680f4bgb8446e7c6cb842cb@mail.gmail.com>	<1209495803.5173.11.camel@aalcdl07.lib.unc.edu>
	<mailman.342.1209497983.12834.python-list@python.org>
Message-ID: <cv-dnW3EftaBUIDVnZ2dnUVZ_smnnZ2d@pdx.net>

D'Arcy J.M. Cain wrote:
> On Tue, 29 Apr 2008 15:03:23 -0400
> "J. Cliff Dyer" <jcd at sdf.lonestar.org> wrote:
>> Or, if you aren't sure how many colors you'll be using, try the more
>> robust:
>>
>> bg[z % len(bg)]
> 
> Good point although I would have calculated the length once at the
> start rather than each time through the loop.
> 
You may be surprised to find out that len(foo) is typically a
retrieval question, not so much a calculation.  Of course, measure
anything you care about, and special methods may do much more, but
in general, go for the simplest, clearest code you can write, and
then speed it up when it needs it.

I'd use len(bg) above unless my code was littered with calls to
len of the same thing, in which case it might it might be clearer
to choose a good name for len(bg).

--Scott David Daniels
Scott.Daniels at Acm.Org


From duncan.booth at invalid.invalid  Sat May  3 16:51:41 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 May 2008 20:51:41 GMT
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <Xns9A93DE69E5784duncanbooth@127.0.0.1>

dave <squareswallower at y1a2hoo3.com> wrote:

> Hello,
> 
> here is a piece of code I wrote to check the frequency of values and 
> switch them around to keys in a new dictionary.  Just to measure how 
> many times a certain key occurs:
> 
> def invert(d):
>      inv = {}
>      for key in d:
>           val = d[key]
>           if val not in inv:
>                inv.setdefault(val, [key])
>           else:
>                inv[val].append(key)
>      return inv
> 
> 
> Using the methods above (I'm just a beginner) could I have written it 
> more concisely?  Any criticism/critique in the code would be greatly 
> appreciated.
> 
The obvious change I'd make is:


     if val not in inv:
         inv[val] = key
     else:
         ... etc.

The setdefault method is only appropriate if you don't know 
whether or not the key is in the dictionary. since you've already tests 
that you should just go ahead and set the value.
Otherwise it all seems fine.


From george.sakkis at gmail.com  Wed May 28 18:10:41 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 28 May 2008 15:10:41 -0700 (PDT)
Subject: Writing a function from within Python
References: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>
Message-ID: <3c3f7866-75df-43c7-bbc6-cd2b80641a24@k30g2000hse.googlegroups.com>

On May 28, 4:39 pm, Aaron Scott <aaron.hildebra... at gmail.com> wrote:
> Is it possible to change the content of a function after the function
> has been created? For instance, say I make a class:
>
>         class MyClass:
>                 def ClassFunction(self):
>                         return 1
>
> And I create an object:
>
>         MyObject = MyClass()
>
> Is there any way to change the content of the function, a la pseudo-
> code:
>
>         MyObject.ClassFunction = "return 2"
>
> Thanks for any insight you might be able to offer.

The short answer is "yes". The longer answer is "yes but most likely
there are better approaches to whatever you want to do". If you give a
bit more context of the general problem you're trying to solve, I'm
sure you'll get more helpful replies.

George


From hdante at gmail.com  Thu May 22 00:41:13 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 21:41:13 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com> 
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>
Message-ID: <8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>

On May 22, 1:36?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 22, 1:26?am, Henrique Dante de Almeida <hda... at gmail.com>
> wrote:
>
>
>
> > On May 21, 3:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:
>
> > >>> a = 1e16-2.
> > > >>> a
> > > 9999999999999998.0
> > > >>> a+0.999 ? ? # gives expected result
> > > 9999999999999998.0
> > > >>> a+0.9999 ? # doesn't round correctly.
>
> > > 10000000000000000.0
>
> > ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> > ?1e16-2 == 0x1.1c37937e07fffp+53
> > ?1e16 == 0x1.1c37937e08p+53
>
> > ?(that is, the hex representation ends with "7fff", then goes to
> > "8000").
>
> > ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> > This is not a bug, it's a feature.
>
> ?I didn't answer your question. :-/
>
> ?Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
> by default. So that's strange.
>
> ?The following code compiled with gcc 4.2 (without optimization) gives
> the same result:
>
> #include <stdio.h>
>
> int main (void)
> {
> ? ? ? ? double a;
>
> ? ? ? ? while(1) {
> ? ? ? ? ? ? ? ? scanf("%lg", &a);
> ? ? ? ? ? ? ? ? printf("%a\n", a);
> ? ? ? ? ? ? ? ? printf("%a\n", a + 0.999);
> ? ? ? ? ? ? ? ? printf("%a\n", a + 0.9999);
> ? ? ? ? }
>
> }
>
>

 However, compiling it with "-mfpmath=sse -msse2" it works. (it
doesn't work with -msse either).


From banibrata.dutta at gmail.com  Mon May 12 13:43:35 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 23:13:35 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
	<fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>
Message-ID: <3de8e1f70805121043g786df5a4u2225862253858b87@mail.gmail.com>

Thank you all for the pointers and precise information.
Python community support surely rocks!!


On 5/12/08, Daniel Fetchinson <fetchinson at googlemail.com> wrote:
>
> > >>  Again a noob question.
> > >>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces ,
> is it
> > >> correct to conclude that there is no RDBMS agnostic, single/uniform
> DB
> > >> access API for Python ?
> > >> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> > >>  How is the RDBMS change handled for solutions which need to work
> with
> > >> different RDBMSs ??
> > >>
> > > http://www.python.org/dev/peps/pep-0249/
> > >
> >
> >
> > That appears to be only an API specification. Are there any
> implementations
> > of that ?
>
> For sqlite: http://oss.itsystementwicklung.de/trac/pysqlite/ if you
> have python < 2.5 for 2.5 and up it is included in the stdlib
>
> For mysql: http://sourceforge.net/projects/mysql-python
>
> There are a tons more, including postgresql, oracle, etc:
> http://wiki.python.org/moin/DatabaseInterfaces
>
> Cheers,
> Daniel
> --
> Psss, psss, put it down! - http://www.cafepress.com/putitdown
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From lists at cheimes.de  Mon May 12 12:30:39 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 12 May 2008 18:30:39 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09m9n$c8h$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>	<482855df$0$14196$9b622d9e@news.freenet.de>
	<g09m9n$c8h$1@theodyn.ncf.ca>
Message-ID: <482870AF.6020500@cheimes.de>

Colin J. Williams schrieb:
>> See PCbuild/readme.txt.
> 
> I presume that this is PCbuild8.txt

No, it's PCbuild/readme.txt in Python 2.6 and 3.0

By the way you can call Tools\buildbot\external.bat from the root
directory of the 2.6 and 3.0. It checks out and build the dependencies.
The script requires the VS 9.0 tools and the svn command line executables.

Christian



From gagsl-py2 at yahoo.com.ar  Mon May 26 19:23:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 20:23:39 -0300
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <op.ubsa9p0sx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 17:02:21 -0300, Russ P. <Russ.Paielli at gmail.com>  
escribi?:
> On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk>  
>> escribi?:
>>> On May 26, 6:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
>>>> I am also bothered a bit by the seeming inconsistency of the rules for
>>>> the single underscore. When used at file scope, they make the variable
>>>> or function invisible outside the module, but when used at class
>>>> scope, the "underscored" variables or functions are still fully
>>>> visible. For those who claim that the client should be left to decide
>>>> what to use, why is the client prohibited from using underscored
>>>> variables at file scope?
>>
>> There is no rationale because this is not how it works... [snip  
>> explanation of how import works]
>
> Well, that's interesting, but it's not particularly relevant to the
> original point. By default, underscored variables at file scope are
> not made visible by importing the module in which they appear. But
> underscored member variables of a class *are* made visible to the
> client by default. That's seems at least slightly inconsistent to me.

To make things clear: _variables ARE visible when you import a module:

C:\TEMP>type module.py
_variable = 123

(invoke python)
py> import module
py> module._variable
123
py> dir(module)
['__builtins__', '__doc__', '__file__', '__name__', '_variable']
py>
py> from module import _variable
py> _variable
123

Only when you use "from module import *" _variable isn't imported.
(new python session):

py> from module import *
py> _variable
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name '_variable' is not defined

That last form should not be used normally, except when playing with the  
interactive interpreter.

> The issue here, for me at least, is not whether the data or methods
> should be absolutely hidden from the client. I'm perfectly willing to
> say that the client should have a back door -- or even a side door --
> to get access to "private" data or methods.
>
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.
>
> Is this a major issue? No. Is it a significant issue. Yes, I think so.

Ok, that's what you'd like Python to be. Unfortunately your view appears  
not to be shared by the language developers.

> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.

Python data model is centered on namespaces, and it's hard to tell whether  
certain attribute is being accessed from "inside the class" or from  
"outside the class" in order to allow or deny access.
It's not like static languages where the whole class definition has a  
certain lexical scope and it can't be modified afterwards; the set of  
allowed attributes is fixed at compile time. In Python you can  
add/remove/alter attributes (including methods) dynamically. You can  
create classes without using the class statement. The same method may be  
shared by many unrelated classes. If you can devise a practical and  
efficient mechanism to determine access right in all those varying  
circumstances, please post it to the python-ideas list for further  
discussion. (In the meantime we'll continue to use a naming convention for  
us consenting adults.)

> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

I like the fact that the mere attribute name conveys useful information  
abut its intended usage. And I don't care about the _, it doesn't look  
ugly to me. But that's just my personal opinion.

-- 
Gabriel Genellina



From Scott.Daniels at Acm.Org  Sat May 24 10:37:00 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 24 May 2008 07:37:00 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <mailman.1525.1211632496.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <DcCdnTamgM1quKXVnZ2dnUVZ_gednZ2d@pdx.net>

David wrote:
> Specifically, if you've just written 100 new lines of Python code, then:
> 1) How do you test the new code?
> 2) How do you ensure that the code will work correctly in the future?
> 
> Short version:
> 
> For (1) I thoroughly (manually) test code as I write it, before
> checking in to version control.
> 
> For (2) I code defensively.
> 
...
> As for point 1 (how do you test the new code?):
> I like the idea of automated unit tests. However, in practice I find
> they take a long time to write and test, especially if you want to
> have good coverage (not just lines, but also possible logic branches).
This is why I have reluctantly come to accept the XP people's view:
if you you write the tests _as_ you develop (that is as far as I go
w/o re-enforcement; they would have you write them _before_), you will
have a body of tests that work to demonstrate the correctness or
deficiencies of your code based on what it _should_ do.  If you write
tests after you've written the code, you will write tests that are
based on what your code _actually_does_.  You don't want the latter;
the tests are brittle.  The tests don't match needs, rather they
match implementations.  Therefore you'll need to discard more tests at
every local rewrite.

> 1) Add "raise 'UNTESTED'" lines to the top of every function
String exceptions are deprecated.  Just raise UNTESTED (and let the
access to undefined global error be the issue).
...<describes how to do code coverage by hand>...
> 11) Cause those sections of code to be run also (sometimes I need to
> temporarily set vars to impossible values inside the script, since the
> logic will never run otherwise)
> 
> And here is one of my biggest problem with unit tests. How do you unit
> test code which almost never runs? The only easy way I can think of is
> for the code to have 'if <some almost impossible condition> or <busy
> running test case XYZ> lines'. I know I'm meant to make 'fake' testing
> classes which return erroneous values, and then pass these objects to
> the code being tested. But this can take a long time and even then
> isn't guaranteed to reach all your error-handling code.
Ah, but now you tests are "brittle"; they only work for the code you 
have now.
If you want to make sure you have code coverage with your test, the XP
way is:
     Write a test for behavior you need.
     Watch it fail.
     Fix the code so all tests pass.
     Lather, rinse, repeat.
You should not have untested code, because there was no test that made
you write it.  If you want to do code coverage, find a code coverage
tool and count your code while runnign your unit tests.


--Scott David Daniels
Scott.Daniels at Acm.Org


From daveparker at flamingthunder.com  Tue May 13 13:41:00 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:41:00 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
Message-ID: <bccdfe5d-c880-4a39-95c6-18bf72ba2fdf@s33g2000pri.googlegroups.com>

Time for me to get back to work now.  Thank you all for your comments,
they will help to make Flaming Thunder a better product.  I can see
that many people would like the ability to link to existing
applications and libraries, etc, so I will raise that on my priority
list.


From tinnews at isbd.co.uk  Thu May 15 06:52:44 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 15 May 2008 10:52:44 GMT
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
	<3c0c.482c0fc1.3224e@altium.nl>
Message-ID: <482c15fc$0$656$bed64819@news.gradwell.net>

Kees Bakker <spam at altium.nl> wrote:
> 
> So far, I have seen only one editor that understands the difference between
> TABs and indentation, and that is Emacs.

Most vi clones (and the original vi) do too!  :-)

E.g. in the clone I use (vile) there are independent settings for
tabstop and shiftwidth.  In addition you can tell the editor to change
tabs to spaces (or not) as you wish.

-- 
Chris Green


From mensanator at aol.com  Sun May 11 00:16:15 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 21:16:15 -0700 (PDT)
Subject: Prettyprinting SQL statements
References: <flossy-5582CC.20235310052008@comcast.dca.giganews.com>
Message-ID: <c78a2471-96a6-4795-b7a5-f9676cee0609@z72g2000hsb.googlegroups.com>

On May 10, 10:23?pm, MooJoo <flossy at bobbsey_twins.com> wrote:
> I'm building a Python app that will be making queries to a MySQL server
> using the MySQLdb module. The app will need to create SQL statements on
> the fly which, in addition to going to the server, will occasionally
> need to be displayed to the user. While these queries are not too
> complex, they still can be difficult to decipher without doing some
> formatting. I've done the requisite Googling to see if a library to
> format SQL can be found but, other than commericial Windows apps and
> some on-line formatters, I've not found anything remotely usable. Before
> trying to write my own parser/formatter, I was hoping somebody might
> know of a package to perform this function.
>
> Anybody? Ferris? Anybody at all?
>
> Thanks.

I always just do this:

def keyword(s):
  if s.isupper():
    return '\n'+s+'\t'
  else:
    return s
sql = "SELECT letter.*,letter1.* FROM letter,letter AS letter1 ORDER
BY letter.n;"
s = sql.split()
pp = ' '.join(map(keyword,s))
print pp

Then insert the pp strings into my source code as shown.

# unjoined tables create a Cartesian Product
#
import sqlite3

con = sqlite3.connect(":memory:")
cur = con.cursor()
cur.executescript("""
create table letter(n);
""")

letters = [('a'),('b'),('c'),('d'),('e'),('f'),('g'),('h')]

cur.executemany("""
INSERT
INTO	 letter(n)
VALUES	 (?);
"""
, letters)

cur.execute("""
SELECT	 letter.*,letter1.*
FROM	 letter,letter
AS	 letter1
ORDER
BY	 letter.n;
""")

cartesian_product = cur.fetchall()

for i in cartesian_product:
   print i[0]+i[1],


From daveparker at flamingthunder.com  Mon May 19 23:33:43 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:33:43 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
Message-ID: <b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>

On May 14, 7:59?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Would it be valid to say:
>
> x = "concrete"
>
> or to say:
>
> if command (is) set to "quit"
>
> ??????

I like the idea of:

If command is set to "quit" ...

I've added it to my list of things to think about, and possibly
implement.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:09:13 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:09:13 +0200
Subject: explain this function to me, lambda confusion
In-Reply-To: <74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
	<74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>
Message-ID: <48327914$0$30041$426a74cc@news.free.fr>

Paul McGuire a ?crit :
> On May 19, 11:04 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Paul McGuire <pt... at austin.rr.com> writes:
>>
>> [...]
>>
>> Could you use it as a decoratore instead?
>>
>> integer = Word("0123456789")
>>
>> @integer.setParseAction
>> def parse_integer(tokens):
>>     return int(tokens[0])
>>
>> I could make your grammar clearer, because you don't mix it with
>> processing code... and no need for lambdas!
> 
> What a sexy little idiom!  You could really apply this to any API
> method that accepts a callable as a single argument, and pyparsing
> actually has several of these:
> 
> setParseAction
> addParseAction
> setFailAction
> setDebugActions
> 
> (Unfortunately, setDebugActions requires 3 callables for its arguments
> - one to be run when an expression is about to be parsed, one to be
> run after parsing is complete, and one to be run if the expression
> fails to be parsed.  So setDebugActions can't be used in this
> decorator manner.)

You just have to provide three decorators instead, one for each callback.

> 
> Using these methods as decorators deviates from the typical decorator
> usage model as I understand it - instead of wrapping the provided
> function within some enclosing setup/teardown code (like lock/unlock,
> or open-file/close-file, or begin-transaction/commit-transaction), and
> then returning the created wrapper function, the decorator usage you
> propose is one in which the decorator uses the provided function with
> some side-effect (such as setting a property), but then just returns
> the original function.

This is already a well-known decorator pattern. It's used in CherryPy to 
mark methods that are exposed as request handlers.



From roy at panix.com  Fri May  2 10:11:36 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 10:11:36 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
Message-ID: <roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>

In article <87r6ckzvyv.fsf at benfinney.id.au>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Whereas if Python is *not* installed from an OS package, it's up to
> the sys admin to ensure that it works -- not up to my program. So I
> don't see the point in making it work by default, when what I want for
> my program is that it works *with the default Python*, not with some
> non-default installation.

Ben,

Have you ever shipped software to a customer?  Imagine the following 
conversation:

Customer: "Your product is broken.  It says it can't find python, and I 
know I have it installed".

Vendor: "Where do you have it installed?"

Customer: "In /opt/bin/python"

Vendor: "Oh, that's your problem, it HAS to be in /usr/bin/python".

Customer: "I can't install it there because <insert whatever silly reason 
the customer has>.  If you can't make your product work without requiring 
me to install python in /usr/bin, I'm afraid I can't buy your product".

Vendor: "No problem sir, I'll be happy to tell our sales folks to stop 
bothering you".

If you want to hard-code /usr/bin/python into your application, that's your 
decision.  If you would like to take on the task of convincing every 
sysadmin in the world to do things the way you think they should be done, 
have fun.


From maxm at mxm.dk  Mon May 26 04:26:24 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 10:26:24 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <g1ds7g$6rq$1@ger.gmane.org>

erik.oosterwaal at gmail.com skrev:
> Hi All,

> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.

Hi Erik,

I am an experienced Python developer working mostly in Plone. Before 
that I came from asp like you.


If you want something that is most like what you are used to, you should 
check out Django. I have not worked in it, but it get high praises from 
developers I trust.

http://www.djangoproject.com/


If you want a more "modern" approach you should check out Grok. It has 
been built on all the experiences made with Zope 2, CMF and Plone. It is 
based on Zope 3.

http://grok.zope.org/

It is the one I would choose if starting from fresh today.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From destroooooy at gmail.com  Mon May 19 15:39:36 2008
From: destroooooy at gmail.com (destroooooy)
Date: Mon, 19 May 2008 12:39:36 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>

I'm wondering what is the canonical usage of the keywords 'is' and
'not' when you're writing conditionals and loops. The one I've been
following is completely arbitrary--I use the symbols '==', '!=' for
numerical comparisons and the words 'is', 'not' for everything else.

Thanks in advance!


From ivan.illarionov at gmail.com  Sat May 17 00:01:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 04:01:50 +0000 (UTC)
Subject: Classmethods are evil
Message-ID: <g0llbe$2k6o$1@news.mtu.ru>

After re-reading "Python is not Java" I finally came to conclusion that 
classmethods in Python are a very Bad Thing. 

I can't see any use-case of them that couldn't be re-written more clearly 
with methods of metaclass or plain functions.

They have the following issues:
1. You mix instance-level and class-level functionality in one place 
making your code a mess.
2. They are slower than metaclass methods or plain functions.

I really want to hear your opinions on the subject.

-- Ivan


From wmcbrine at users.sf.net  Wed May 28 01:01:37 2008
From: wmcbrine at users.sf.net (William McBrine)
Date: Wed, 28 May 2008 05:01:37 GMT
Subject: Keeping focus with sequential Tkinter windows?
Message-ID: <RG5%j.9823$9H6.3882@trnddc04>

So, basically what I'm doing is this:

window1 = Tkinter.Tk()
...
window1.destroy()
...
window2 = Tkinter.Tk()

This works well in Linux and Mac OS X (and the PyGtk equivalent works on 
all platforms), but in Windows XP, the second window comes up without 
focus. (I have to click on it to focus it.) This is true even with no 
other windows on screen. I've tried window2.focus_set(), window2.lift(), 
etc., to no avail. What's the right way to do this?

-- 
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- pass it on


From bignose+hates-spam at benfinney.id.au  Sat May 24 10:00:32 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 00:00:32 +1000
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <87zlqfajjz.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of
> naming the attribute with a single leading underscore. This is a
> string signal that the attribute is part of the implementation, not
> the interface.

Quite apart from whether it's a string signal, I meant to write that
it's a *strong* signal.

-- 
 \        "Some people, when confronted with a problem, think 'I know, |
  `\       I'll use regular expressions'. Now they have two problems." |
_o__)                           ?Jamie Zawinski, in alt.religion.emacs |
Ben Finney


From basti.wiesner at gmx.net  Sat May 17 14:16:05 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 17 May 2008 20:16:05 +0200
Subject: Install man-pages with distutils/setuptools
References: <482ec6e0$0$6774$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <g0n7d5$vs1$01$1@news.t-online.com>

[ Hartmut Goebel <h.goebel at goebel-consult.de> ]

> Hi,
> 
> is there a standard way or a snippet for installing man-pages with
> 
>    python set.py install
> 
> when using distutils or setuptools?
No, not even setuptools provides a standard way for man pages.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Tue May 13 13:32:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 19:32:30 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <68u1lqF2sv8gjU1@mid.uni-berlin.de>

Dave Parker schrieb:
>> Just to support this statement: PHP runs an order of magnitude slower than
>> python. Yet a great deal (if not the majority) of dynamic sites out there
>> run under PHP. All of these are unhappy customers?
> 
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.

Slow websites mainly come from bad coding. I've seen websites performing 
slow written in Java - which should even surpass FT, btw.

> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
> 
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"
> http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss


You obviously have no clue what this aboven statement talks about. It is 
not about speed - it's about how HTML is generated, and the negative 
impact of visual design tools on that. What on earth has that to do with 
the execution speed of a webapp?

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

"Faster" wins, yes - in the sense of brain-cycles. Faster coding, faster 
changing, faster delivering. If it was anything else, we wouldn't have 
higher level languages, and still code assembler.

You really don't know what you are talking about. But you are of course 
entitled to your opininon. Time will tell who is the "fad", and who not. 
I can assure you I have a strong opinion on that....

Diez


From notbob at nothome.com  Wed May  7 10:38:32 2008
From: notbob at nothome.com (notbob)
Date: Wed, 07 May 2008 14:38:32 GMT
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
	<995582f9-754f-4f6e-857e-8156ea7b0b20@56g2000hsm.googlegroups.com>
Message-ID: <I9jUj.25744$em5.11581@fe117.usenetserver.com>

On 2008-05-06, hdante <hdante at gmail.com> wrote:

>  When you have a problem with your code, always post here the complete
> code and a complete execution. For example:

I'll keep this example.  Thnx.


>  /----------\  glued
> |  bruce   | ------> 42
>  \----------/
>
>  When you use a stamp, it returns what it's glued on:
>
> >>> bruce = 42  # glue a stamp
> >>> print bruce # use the stamp
>  42

>  'bruce' is a string (notice the quotes). In this case bruce is glued
> to 'bruce':
>
>  /----------\  glued
> |  bruce   | ------> 'bruce'
>  \----------/

The light is dawning.....  

>  Stupid. Not really. :-) I'd rather say that the problem is the book.

Well, me too, of course.  ;)  

> The book is just another introduction to programming. There's no
> special attempt to make the reader learn to think like a computer
> scientist.

Apparently, and I understand.  It's hard for someone who is very
knowledgable on a subject to remain in "explain it like they're 5 yrs old"
mode.  It's tedious and time consuming.

>> How am I supposed to get the original def to work?  I've yet to figure out

>  file myfile.py:
> -------------------------------
> def print_twice(bruce):
> 	print bruce, bruce
>
> print_twice('bruce')
> print_twice(2)
> -------------------------------
>
> execution:
> -------------------------------
> $ python myfile.py
> bruce bruce
> 2 2

BINGO!  (and it worked (after I got the indents right))

>  Finally, you don't understand something, ask again.

Thank you.  I really do appreciate your taking the time to break it down
so completely.  I found another python book (A Byte of Python) that keeps it
simple enough for me.  I'm not really a programmer, but I decided to do
something to challenge this old geezer brain and figured this would keep it
awake.  

I'd also like to thank all you other folks who responded.  I got some good
info and tips from all of you.  

nb


From iqbaltalaat at gmail.com  Fri May 16 12:06:27 2008
From: iqbaltalaat at gmail.com (I-T)
Date: Fri, 16 May 2008 09:06:27 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
	<m2d4nn8fgp.fsf@googlemail.com>
	<781ccceb-2474-484f-b6c8-f4b59b2396b5@27g2000hsf.googlegroups.com>
	<m28wya8dd2.fsf@googlemail.com>
Message-ID: <c0eaf575-4b65-4a8f-ad53-0718fd14885a@1g2000prg.googlegroups.com>

A thousand apologies for my ignorance. I'll try not to get names mixed
up again in the future.

On May 16, 8:42?pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> afrobeard <afrobe... at gmail.com> writes:
> > Arnaud's code wont work if self.opt1 is None, an empty list, an empty
> > tuple, False, etc, because all these evaluate to false. They wont
> > print the internal state of these variables. [Just an informational
> > notice, this may be the behavior you expect]
>
> ??? My suggestion is to get rid of attributes altogether and does not
> test any truth values.
>
>
>
> > Secondly, I'm not sure if you know the variable names from before hand
> > in which case Casey's approach will work, or you need to know them via
> > introspection.http://www.ibm.com/developerworks/library/l-pyint.html
> > [Scroll down to attributes].
>
> > On May 16, 1:44?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> >> Casey <casey.mcgi... at gmail.com> writes:
> >> > Hi,
>
> >> > I have some classes that print variable outputs depending on their
> >> > internal state, like so:
>
> >> > def __str__(self):
> >> > ? ? out = []
> >> > ? ? if self.opt1: out += ['option 1 is %s' % self.opt1']
> >> > ? ? if self.opt2: out += ['option 2 is %s' % self.opt2']
> >> > ? ? ....
> >> > ? ? return '\n'.join(out)
>
> >> > Is there any way to make this cleaner?
>
> >> Maybe.
>
> >> Have a dictionary of options rather than individual attributes;
> >> options not in the dictionary are not set. E.g.
>
> >> mask = {
> >> ? ? 'opt1': 'option 1 is %s',
> >> ? ? 'opt2': 'option 2 is %s',
> >> ? ? ...
> >> ? ? }
>
> >> def __str__(self):
> >> ? ? return '\n'.join(mask[o] % v for o,v in self.options.iteritems())
>
> >> --
> >> Arnaud



From roy at panix.com  Fri May  2 14:03:47 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 14:03:47 -0400
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
Message-ID: <roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>

In article 
<59915ad0-2af1-4903-8ffd-48da2ce4e647 at y22g2000prd.googlegroups.com>,
 mp <mailpitches at email.com> wrote:

> Code is at bottom. Basically, if I turn off socket blocking prior to
> connecting, I get a "Socket is not connected" error when I try to send
> data. However, if I do not turn off blocking, OR if I place a print
> statement anywhere before the send call, it works! WTF?
> 
> I'd like to understand what's going on in the background here, if you
> know don't skimp on the details.
> 
> Thanks
> 
> ---------------------------------------------------------------
> import
> socket
> sock = socket.socket(socket.AF_INET,
> socket.SOCK_STREAM)
> sock.setblocking(0)
> sock.connect_ex(('localhost',
> 9000))
> sock.setblocking(1)
> sock.send('foo')
> sock.close()

I can't be 100% sure about this because I don't know what's running on your 
port 9000 that you're trying to connect to, but I think I know what's going 
on.

I just tried your code, but changed 9000 to 22 (ssh).  What I found is that 
if you eliminate the setblocking(0) call, the connect_ex() call returns 0, 
indicating it succeeded.  If you leave the setblocking(0) call in, 
connect_ex() returns EINPROGRESS (Operation now in progress).  This makes 
sense.  Here's the code:

import socket
import os
import errno

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setblocking(0)
err = sock.connect_ex(('localhost', 22))
print errno.errorcode[err], os.strerror(err)

When you do a TCP connect, there is what's called a three-way handshake 
that happens between the TCP stacks at the two ends of the connection.  I 
send a packet with the SYN bit set, you respond with a packet with both SYN 
and ACK set, and I respond with an ACK.  Even when both ends are on the 
same box (i.e. localhost), this has to happen.

Quoting from http://docs.python.org/lib/socket-objects.html:

> Some notes on socket blocking and timeouts: [...] In non-blocking mode, 
> operations fail (with an error that is unfortunately system-dependent) if 
> they cannot be completed immediately.

Since the three-way handshake can't be completed immediately, the 
connect_ex call fails when you try it in non-blocking mode.

So, that's the explanation.  Now the question: What are you trying to do 
that you need non-blocking mode?  Or are you just experimenting to see what 
happens?

BTW, this was done on an OSX-10.5.2 box, but I think the result would be 
essentially the same on any platform.


From gagsl-py2 at yahoo.com.ar  Thu May  1 04:41:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 05:41:37 -0300
Subject: Sending Cntrl-C ??
References: <0274834e-17e1-4a95-88ec-f2aa77aeb3a9@k10g2000prm.googlegroups.com>
	<mailman.350.1209505715.12834.python-list@python.org>
	<a2656a56-739c-4a36-bfb3-1ef785ef6edd@p25g2000pri.googlegroups.com>
	<fv8c4q$kmd$1@ger.gmane.org>
	<mailman.367.1209546765.12834.python-list@python.org>
	<8d53535b-b00e-40b4-b65f-1ca126884592@k10g2000prm.googlegroups.com>
Message-ID: <op.uagvrnaix6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 30 Apr 2008 15:06:13 -0300, gamename <namesagame-usenet at yahoo.com>  
escribi?:

>> win32api.GenerateConsoleCtrlEvent(win32con.CTRL_C_EVENT, pgid)
>
> How do you determine the value of 'pgid'?

Make the child start a new process group, then its pid is the process  
group ID. You have to use the "creationflags" parameter of subprocess.open
The documentation for GenerateConsoleCtrlEvent  
http://msdn.microsoft.com/en-us/library/ms683155.aspx states that you  
can't send CTRL_C_EVENT to another process group, only CTRL_BREAK_EVENT  
(and only to the same console as the sender process). A little example:

<code>
import subprocess
import ctypes
import time

CREATE_NEW_PROCESS_GROUP = 512
CTRL_C_EVENT = 0
CTRL_BREAK_EVENT = 1
GenerateConsoleCtrlEvent = ctypes.windll.kernel32.GenerateConsoleCtrlEvent

print "start child process"
p = subprocess.Popen("cmd /c for /L %d in (10,-1,0) do @(echo %d && sleep  
1)",
         creationflags = CREATE_NEW_PROCESS_GROUP)
print "pid=", p.pid
print "wait 3 secs"
time.sleep(3)
print "send Ctrl-Break"
GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, p.pid)
print "wait for child to stop"
print "retcode=", p.wait()
print "done"
</code>

Output:

start child process
pid= 872
wait 3 secs
10
9
8
7
send Ctrl-Break
wait for child to stop
retcode= 255
done

(Instead of ctypes and those magical constants, you can install the  
pywin32 package and use win32api.GenerateConsoleCtrlEvent,  
win32con.CTRL_BREAK_EVENT and win32process.CREATE_NEW_PROCESS_GROUP)

The only way I know of to send a Ctrl-C event to a different console  
involves remote code injection.

-- 
Gabriel Genellina



From castironpi at gmail.com  Wed May  7 14:07:45 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 11:07:45 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org> 
	<64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>
Message-ID: <12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>

On May 7, 9:07?am, castiro... at gmail.com wrote:
> '''
> On May 6, 4:43 pm, pyt... at bdurham.com honoring:
>
> >>> a.next( )
> ( "I", )
> >>> a.throw( up )
> ( "I", "A" )
> >>> a.next( )
> ( "I", "B" )
> >>> a.next( )
> ( "I", "C" )
> >>> a.throw( down )
>
> ( "II", )
> '''
>
> #funny declaration
> class up( Exception ): pass
> class down( Exception ): pass
>
> def outline( ):
> ? ? stack= [ 1 ]
> ? ? while 1:
> ? ? ? ? try:
> ? ? ? ? ? ? yield stack
> ? ? ? ? ? ? stack[ -1 ]+= 1
> ? ? ? ? except up:
> ? ? ? ? ? ? stack.append( 1 )
> ? ? ? ? except down:
> ? ? ? ? ? ? stack.pop( -1 )
> ? ? ? ? ? ? stack[ -1 ]+= 1
>
> a= outline( )
> print a.next( )
> print a.throw( up )
> print a.next( )
> print a.next( )
> print a.throw( down )
> print a.throw( up )
> print a.throw( up )
> print a.next( )
> print a.next( )
> print a.throw( down )
>
> ##output:
>
> [1]
> [1, 1]
> [1, 2]
> [1, 3]
> [2]
> [2, 1]
> [2, 1, 1]
> [2, 1, 2]
> [2, 1, 3]
> [2, 2]
>
> ##
>
> cf.
>
> formatter.NullFormatter.format_counter
> formatter.NullFormatter.format_letter
> formatter.NullFormatter.format_roman

One execution of Python 3a4 included in built-ins.

Python 3.0
 win32
Type "help
>>> next
<built-in
>>>

Do you want send and throw in it too?


From rocky at panix.com  Thu May 15 07:26:07 2008
From: rocky at panix.com (R. Bernstein)
Date: Thu, 15 May 2008 07:26:07 -0400
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
Message-ID: <wihr6c33j1s.fsf@panix5.panix.com>

"Alan J. Salmoni" <salmoni at gmail.com> writes:
> I'm not sure if this is exactly what you're after, but try looking
> into the 'code' module.
>
> It's fairly easy to make an interactive interpreter that runs within
> your program. If you import your programs variables into
> __main__.__dict__, you can have access to them which can be funky. You
> can even override the showtraceback method to catch various exceptions
> and do daft things like adding new methods to strings. I guess it
> would even be possible to have the commands compared to a list of
> commands and keywords to build a restricted interpreter, though how
> secure this would be against a determined attack is another matter.
>
> Alan

I think this (largely) does the trick. Thanks!

I'm not sure about how to deal with globals yet which should come from
a stackframe f_globals. It might be possible to save and restore
__main__.__dict__ before and after the call to interact(). Probably
would have been cooler to design interact() to take a globals
parameter, same as eval does.


>
> On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
>> The next release of pydb will have the ability to go into ipython from
>> inside the debugger. Sort of like how in ruby-debug you can go into
>> irb :-)
>>
>> For ipython, this can be done pretty simply; there is an IPShellEmbed
>> method which returns something you can call. But how could one do the
>> same for the stock python interactive shell?
>>
>> To take this out of the realm of debugging. What you want to do is to
>> write a python program that goes into the python interactive shell -
>> without having to write your own a read/eval loop and deal with
>> readline, continuation lines, etc.
>>
>> The solution should also allow
>>  - variables/methods in the calling PYthon program to be visible
>>    in the shell
>>  - variables set in the interactive (sub) shell should persist after the shell
>>    terminates, although this is a weaker requirement. POSIX subshells
>>    for example *don't* work this way.
>>
>> There has been much written about how to embed Python from C, so I
>> suppose this may offer one way. And at worst, I could write
>> a C extension which follows how C Python does this for itself.
>>
>> But is there a simpler way?
>>
>> Thanks.


From paul at boddie.org.uk  Wed May 21 10:23:04 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 21 May 2008 07:23:04 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
Message-ID: <d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>

On 21 Mai, 15:22, giraffe... at gmail.com wrote:
>
> I did and I confirmed this by modifying the data, selecting it from
> the mysql command line client to verify the changes, then running the
> report again. If I exit the application and then start it again,
> everything works as expected until the second instance of the report
> is run.

Note that if you have a connection open in your program, especially if
that connection has already been used to select data, it may be the
case that you then have to perform a rollback or commit before
attempting to access newly added data. The reason for this behaviour
is that the DB-API modules will have begun a transaction on your
behalf, and while that transaction is open, changes committed in other
transactions may be unavailable to your own transaction, depending on
the transaction isolation level.

MySQL appears to use "repeatable read" by default [1] as its
transaction isolation level, whereas PostgreSQL (for example) uses
"read committed" by default [2]. I would guess that if you were using
PostgreSQL, this particular problem would not have occurred, but there
are other reasons to be aware of the effects of long duration
transactions in PostgreSQL, and the practice of periodically
performing a rollback would still be worth considering with that
database system.

Paul

[1] http://dev.mysql.com/doc/refman/5.1/en/innodb-transaction-isolation.html
[2] http://www.postgresql.org/docs/8.1/interactive/transaction-iso.html


From wizzardx at gmail.com  Tue May  6 09:27:54 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 15:27:54 +0200
Subject: How do you debug memory usage?
Message-ID: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>

Hi list.

I've tried Googling for this and I checked the Python docs, but to no avail.

What is the best way to debug memory usage in a Python script?

I'd like to see what objects are using the most memory. Ideally this
would be aware of references too. So if I have a small list that
contains (references rather) some large variables, then I could see
that the global list variable was responsible for X MB that couldn't
be collected by the garbage collector.

It would be nice if it could be used in a similar way to the 'du'
Linux command. eg:

eg output:

>>> mem_debugger.pretty_print()
A (type: list): 8 bytes, 10MB
  - a (type: string): 6 MB, 0 bytes
  - b (type: string): 4 MB, 0 bytes
B (type: dict): 8 bytes, 5 MB
  - d (type: string): 3 MB, 0 bytes
  - c (type: string): 2 MB, 0 bytes

In the output above, the 1st size is the memory used by the object
itself, and the 2nd size is the memory used by objects it refers to. A
& B are global vars (a string and a dict), a,b,c, and d are strings
that were added to A & B at some point in the past, and aren't refered
to by anything else. Also, the output is in descending order of size.

Are there any tools/modules/etc I can use like this?

David.


From arnodel at googlemail.com  Tue May  6 11:37:22 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 16:37:22 +0100
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>
	<6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>
Message-ID: <m24p9b78b1.fsf@googlemail.com>

Aaron Watters <aaron.watters at gmail.com> writes:

> I'm having trouble following your discussion
> and I suspect you might be a friend of Mark V Cheney.
> But I will focus on this one point.
>
> On May 5, 11:14 pm, castiro... at gmail.com wrote:
>> If recursive generators are really useless (erect wall might not be),
>
> I would like to have recursive generators --
> for example to be able to traverse a tree
> and yield the value at every node.  Right now
> to do this you need to build a chain of generators
> from each leaf to the root of the tree (or avoid
> recursion by managing your own stack of nodes).
> Every yield must "bubble up the tree".

There is a patch that allows them:

    http://bugs.python.org/issue2292

But I don't know how it is implemented (i.e. does the 'bubbling up'
behaviour still happen behind the scene?).

Else you could use a trampoline, as I've done here:

    http://www.marooned.org.uk/~arno/python/cogenerator.html

(Scroll down to 'Flattening nested cogenerators' and 'recursive
cogenerators' - I had fun doing it but it is terribly inefficient).

-- 
Arnaud


From ptmcg at austin.rr.com  Mon May 19 09:01:19 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:01:19 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <2196ab0c-93f4-4dba-807f-32f2a9391826@m36g2000hse.googlegroups.com>

On May 19, 4:54?am, kuratk... at kuratkull.com wrote:
> Hello,
>
> ***************
> import urllib2
> import re
> import string
> import sys
>
> url = "http://www.macgyver.com/"
> request = urllib2.Request(url)
> opener = urllib2.build_opener()
> html = opener.open(request).read()
>
> match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
>
> out = match.findall(html)
>
> print out
> **************
>
> I would like to print out string with formatting, but as I read, the
> string is made into a raw string when using re.
> How could I disable or bypass this?
>
> I googled for an hour and couldn't find a solution.
>
> Thank you in advance.

Change your print statement to:

print out[0]

-- Paul


From inhahe at gmail.com  Fri May 23 07:14:08 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 07:14:08 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<69n3poF33hfhfU1@mid.uni-berlin.de>
Message-ID: <DExZj.2777$772.804@bignews2.bellsouth.net>

>
>> To be more specific, let's say I want to create a simple, 2D strategy
>> game. It will have a board layout like chess or checkers and the player
>> will move around the board. Let's say this is all I know, and perhaps I
>> don't even know *this* for sure either. Is it possible to write the
>> logic for such a game at this point?
>
> Maybe even this is possible.  But here you are not only drawing the line
> between GUI and logic but also within the logic part itself because the
> board layout isn't (just) a GUI issue.  If you have checkers, hexagons, or
> other shapes also has influence on the logic part, because you need
> slightly different algorithms for finding ways from tile `A` to tile `B`,
> or to decide when a piece is blocked by others, and how the rules to move
> pieces around look like.  Just imagine how to modify chess rules to a
> board with hexagonal patterns.  It would severely change the logic part.

<purelyacademic>If the GUI defines that it's a board layout like chess or 
checkers and the player will move around the board, it's hard to say what's 
left for the "logic" part to do.  I can't think of any generalization for 
the fact that it's a 2D strategy game.  You could have a 2-dimensional 
array, the size of which is determined by the GUI, but even motion on it 
would have to be defined by the GUI, in which case the GUI would simply be 
using the "logic" part for storing the array and accessing it via index 
values.  And then there's no reason not to put the array inside the GUI. 
Although it would help if only your "logic" part could provide persistence. 
Also, the "logic" part could provide many useful functions that games are 
likely to use, but then it's more like a library than anything else. 
Secondly, it's unclear whether the fact that it's a 2D strategy game was 
included in what he might not know, and in that possible case, strictly 
speaking, he didn't define anything that the logic part *does* know, and it 
being an example, one could theorize that that logically implies the "logic" 
part of the program is null.

>
>> Another example could be printing messages to the player. If I need to
>> say "You killed the monster!", is there a general way to write this, or
>> do I need to specifically refer to GUI widgets and methods, etc. in
>> order for it to be displayed properly?
>
> The observer pattern can be used here.  The GUI has to register a callback
> function with your logic engine and every time you want to inform the
> player about something, your game logic calls that function with the
> message.  It doesn't have to know if it will be rendered as graphic on
> screen, displayed as text in a terminal, or synthesized as sexy female
> computer voice.

If the function name to register the callback function is hard-coded into 
the logic part and into the GUI, then so can the name of the callback 
function itself be, so that it doesn't need to be a callback, barring only 
the possibility of the callback function being changed from one instance to 
the next by the particular GUI, and even that can be done without a callback 
simply by reassigning the name, or in C++ you could cast a pointer to 
function within the hard-coded function and call it and and change that 
pointer when desired.

Not that I know anything about MVC.</purelyacademic>







From Tymoteusz.Jankowski at gmail.com  Sun May 11 02:58:49 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Sat, 10 May 2008 23:58:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>

On May 11, 4:19?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

The range() function returns a list and list is a sequence, isn't?



From mal at egenix.com  Sun May 18 08:31:31 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Sun, 18 May 2008 14:31:31 +0200
Subject: multiple databases, what's the best interface ?
In-Reply-To: <482F29DF.2040804@gmail.com>
References: <482F29DF.2040804@gmail.com>
Message-ID: <483021A3.9060908@egenix.com>

On 2008-05-17 20:54, Stef Mientki wrote:
> hello,
> 
> I need to switch fluently between 2 or 3 types of dbases:
> SQLite, Sybase ( and in the future MS SQL-server).
> 
> I need both closed application and general purpose database manager,
> which should run on different platforms (windows, windows mobile, not 
> web based).
> 
> I would like to write the applications in Python.
> What's the best interface so I can use the same program for all databases,
> and just have to change the database name, if I want to use another 
> database ?

If you need a common interface on all the platforms, then I'd suggest
you have a look at our mxODBC:

http://www.egenix.com/products/python/mxODBC/

If you also need to support Windows Mobile, then you'll be interested
in our upcoming new product called "mxODBC Connect" which separates
the client from the server.

mxODBC Connect allows using the mxODBC API on platforms which don't
come with ODBC drivers or where getting ODBC drivers is difficult.
Due to it's client-server approach it also simplifies configuration
a lot.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 18 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From mccredie at gmail.com  Mon May  5 19:16:15 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 5 May 2008 16:16:15 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>

On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
> Hi,
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
>
> import conf
> print conf.SomeVariable
>
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.
>
> I want to store this data in some conf file (txt) and would like to
> use it same way as I am using these variables as defined in py
> files.
>
> one solution I can think of is writing data as a dictionary into conf
> file. and then by reading data, apply eval on that data. and update
> local dict? but this is not a good solution....
>
> any pointers?
>
> Sandip

I would load the configuration file using `imp.load_source'. This
allows you to load the config file by filename, and gets away from the
issue of accidentally importing a file somewhere else in pythons
search path. Also, calling imp.load_source will reload the module when
called a second time.

http://docs.python.org/lib/module-imp.html

[conf.py]
a = 1
b = 2
class c:
    a = "hello"
    b = "world"
[/end conf.py]

>>> conf = imp.load_source("conf", "./conf.py")
>>> conf.a
1
>>> conf.b
2
>>> conf.c.a
'hello'
>>> conf.c.b
'world'



There are so many ways potential solutions to your problem that,
without any more details, it is hard to suggest anything.

Here are some potential solutions:

ConfigParser - module for handling ini files
xml - several built-in modules for handling XML files
sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
for config data)
windows registry  - _winreg module
pickle - serialize python objects
marshal - similar to pickle, only works for simple objects

Those are just the built-in solutions. If you wanna look at 3rd party
solutions, prepare for overload. The number of alternative INI parsers
alone is staggering.

Also, there are many ways to organize your data and use a solution
similar to what you are already using.

I guess what I'm trying to say is... don't roll your own, it would be
a waste of time, this problem has been solved 100s of times. That is,
unless you want to do it for fun.

Matt


From iapain at gmail.com  Fri May 30 03:13:37 2008
From: iapain at gmail.com (iapain)
Date: Fri, 30 May 2008 00:13:37 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <20638c80-c869-4fc0-b60d-34aa5c93daa9@m45g2000hsb.googlegroups.com>

On May 29, 11:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.
>
> Thanks,
> Nikhil

If you just want to check required value then you can even use Sets or
build your own hash table.


From pavlovevidence at gmail.com  Fri May 23 04:31:10 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 23 May 2008 01:31:10 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>

On May 23, 3:50 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Brad a ?crit :
>
> > cm_gui wrote:
> >> Python is slow.
>
> > It ain't C++, but it ain't a punch card either... somewhere in between.
> > I find it suitable for lots of stuff. I use C++ when performance really
> > matters tho... right tool for the job. Learn a good interpreted language
> > (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.
>
> 2/ actually, all known Python implementations compile to byte-code.
>
> > and you'll be just
> > fine. Until then, quit bitching.

You know, even though you're technically correct, I'd like to see you
abandon this little crusade.  At this point it's more noisy than
helpful.

Like it or not, to most of the world, "interpreted" vs. "compiled" is
a vague pragmatic distinction between fast machine-coded languages and
not-so-fast non-machine-coded languages.  And like it or not, the
world rarely cares to make the distinction between language and
implementation, and frankly, it's usually not necessary to.

What Brad said is perfectly acceptable, and good advice IMHO, under
the common usage of the terms.  I really don't see much reason to call
someone out on it unless they're being deliberately misleading.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Thu May 15 19:18:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 20:18:11 -0300
Subject: basic comparing files
References: <aa405c1f0805150202w3f1dc823wf363512f276f7e93@mail.gmail.com>
Message-ID: <op.ua7xolv9x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 06:02:29 -0300, Beema shafreen  
<beema.shafreen at gmail.com> escribi?:

> I am comparing two files A and B
> which has three columns a1, b1 of A and a2, b2

*three* columns? You menction only two of them.

> say for example if need to compare a1 with a2 and if there are common i  
> have
> display a1, b1, b2
> or else i have to display a1 , b1 or a1, b2

Do you have to syncrhonize both listings? That is, search for matches that  
are not in the same line? Or just compare line by line?
In the first case, the difflib module may help:  
http://docs.python.org/lib/module-difflib.html
In the second case, just iterate over both files, compare lines and  
display one thing or another.

> is the set function going to be the best option or is there any other way

Probably the set type won't be useful - a concrete example of what you  
want would help to provide better ideas.

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Tue May 13 02:56:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 03:56:10 -0300
Subject: Inconsistency in retrieving exceptions via sys module
References: <482874B1.4010504@rice.edu>
Message-ID: <op.ua2yvwy3x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 May 2008 13:47:45 -0300, Raj Bandyopadhyay <rajb at rice.edu>  
escribi?:

> I am writing some C code which sets and retrieves a Python exception. I
> set the exception using PyErr_SetString(), and retrieve it in 2 ways: 1)
> using PyErr_Occurred() and 2) Using sys.exc_type. However, I get two
> different results and am very puzzled by this apparent inconsistency.
> Could anyone please clarify what I'm missing? I need both to work
> consistently for my application.

The sys.exc_* variables are just for backwards compatibility, don't use  
them; use sys.exc_info() in Python code and PyErr_Occurred (and the other  
PyErr... functions) in C. (Note that even PyErr_Occurred is not so common  
in C code, as most functions have some way to say "there was an error"; by  
example, functions that return a PyObject* mark an error returning NULL).

The sys.exc_* variables are set only at the end of each Python bytecode  
instruction (see ceval.c)

-- 
Gabriel Genellina



From nc at iname.com  Sun May 25 16:28:25 2008
From: nc at iname.com (NC)
Date: Sun, 25 May 2008 13:28:25 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
Message-ID: <d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>

On May 25, 11:46 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
>
> If the OP wants to learn the guts of the blog or to implement
> the blog from scratch, Python/Django would be a better choice
> than PHP. The reason is that he can reuse and customize existing
> high quality components for all these auth/auth, admin, comments,
> etc, etc, etc.

You are comparing apples to oranges...  There are application
frameworks
for PHP as well (CakePHP and Symfony come to mind).  CakePHP, if
memory
serves, actually has a development of a blog described in its
tutorial...

> Another reason is that Python and Django encourage very clean design
> while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
> PHP wrapped in spaghetti HTML".

It's absolutely the same thing with PHP frameworks...

> 2 man/year in PHP == 2 man/week in Python/Django.

This, I daresay, is an exaggeration...  Let's take your own example:

> And there are Python/Django blog applications that already do almost
> everything (and maybe more) that WordPress does.http://byteflow.su/
> is one of them (IMHO the most promising).

A quick look at the revision log:

http://byteflow.su/log/

reveals that the initial commit of 60 or so files has been done on
08/14/07
(10 months ago), a second developer came on board 12/01/07 (seven+
months ago),
a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
(also
six+ months ago).  There are at least nine discernible contributors
overall.
Say what you will, but it still looks an awful lot like like two man-
years,
Django or no Django...

Cheers,
NC


From bignose+hates-spam at benfinney.id.au  Fri May 16 04:57:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 16 May 2008 18:57:43 +1000
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <87fxsitym0.fsf@benfinney.id.au>

"??" <littlesweetmelon at gmail.com> writes:

> Howdy,
>     I wonder why below does not work.
> 
> a = object()
> a.b = 1        # dynamic bind attribute failed...
> 
> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK

It's annoyingly difficult to search for information on this; "python
class object type inherit bind attribute" aren't sufficiently
distinguishing to know that we're talking about the built-in 'object'
type, and inheriting from it.

I'm interested to know the answer to your question; thanks for asking it.

-- 
 \     "Don't be afraid of missing opportunities. Behind every failure |
  `\      is an opportunity somebody wishes they had missed."  -- Jane |
_o__)                                          Wagner, via Lily Tomlin |
Ben Finney


From danikar at gmail.com  Sun May  4 06:01:37 2008
From: danikar at gmail.com (danikar at gmail.com)
Date: Sun, 4 May 2008 03:01:37 -0700 (PDT)
Subject: Open a file within an ISO in python.
Message-ID: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>

Is there a way to open a file that is inside of an ISO in python?

Say I have an ISO file, danikars.iso and on the iso there is a file
called information.txt

I want to be able to do something like this.

[code]
iso_h = openiso("danikars.iso")
file_h = iso_h.extract("information.txt")
contents = file_h.read()
[/code]

Is there anything that will give me that functionality? Or close?

Thanks,

Danikar


From frikker at gmail.com  Mon May 19 16:02:24 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 13:02:24 -0700 (PDT)
Subject: MDP: A Simple Feed Forward Network
Message-ID: <6e5511c0-efad-47f5-a5e2-417e9c709bf1@26g2000hsk.googlegroups.com>

Hey everyone,
  I was hoping to see some people out on the python list that are
familiar with MDP (Modular Toolkit for Data Processing -
http://mdp-toolkit.sourceforge.net/)?

  I am wanting to develop a very simple feed forward network.  This
network would consist of a few input neurons, some hidden neurons, and
a few output neurons.  There is no learning involved.  This network is
being used as a gene selection network in a genetic simulator where we
are evolving the weights and connectivity.

  There are many different types of nodes listed as being supported,
but i can't figure out the best one to use for this case.  In this
situation, we only want to iterate through the network X times.  (In
the simples version, with no cycles, this would mean that once the
output nodes are calculated there would be no additional calculations
since the system would be stable and non-learning).  Node types are
listed at the bottom here: http://mdp-toolkit.sourceforge.net/tutorial.html#quick-start

  In the more complex version, we would have the same model but
instead of having straight connectivity all the way through, we would
add a few cycles in the hidden layer so that a few neurons would feed
back into themselves on the next time step.  This could also be
connected to a 'selector' layer, that feeds back on the hidden layer
as well.  Since we are only running this a finite number of times, the
system would not spiral out into instability.

  Any suggestions for which node types to use, or possibly what other
libraries would be helpful? I realize that due to the relative
simplicity of this network I could hand code this from scratch.  MDP
just looks extremely handy and efficient and I'd like to use it if
possible.

Simple Network:

(H is interconnected fully with the Input and Output layer)
I -> H -> O
I -> H -> O
I -> H -> O

Cycled Network (Trying to show that the first hidden neuron is
connected back to itself)
     v---|
I -> H -> O
I -> H -> O
I -> H -> O

Complex Network (Trying to show that the first hidden neuron is
connected to another hidden neuron S that connects back to the input
of H.  S would be interconnected with the other hidden neurons as
well)
         v--- S <--|
I ->    H         -> O
I ->    H         -> O
I ->    H         -> O

Thanks!
-Blaine


From http  Mon May 19 19:07:06 2008
From: http (Paul Rubin)
Date: 19 May 2008 16:07:06 -0700
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>
Message-ID: <7xtzgtyjtx.fsf@ruckus.brouhaha.com>

blaine <frikker at gmail.com> writes:
> How is it that you recommend killing a pure python thread? And also,
> when i use the 'threading' module am I creating a process, or a (gasp)
> thread?

A thread.

> (Is this an obvious question - and if so, how does one create
> a 'process'?)

os.fork()


From alokkat at gmail.com  Thu May 29 00:00:21 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Thu, 29 May 2008 00:00:21 -0400
Subject: Struct usages in Python
In-Reply-To: <m2bq2q48nu.fsf@googlemail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
Message-ID: <e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>

Thanks to everyone for your help.

I am able to use array of structure (here Event is a class) in the following
manner. But here I am fixing the array index as 4. Is there any easy way to
keep it appending dynamically.

self.event = [Event() for x in range(4)]  # Event is a class as posted in
original message.

I have one set of structures and want to process them, subsequently couple
of them will not be able to pass the criteria and all passed ones I wanted
to put in another list where I can dynamically append the structure. So that
I can post this list to server.

Thanks in advance.

Regards
Alok


On Wed, May 28, 2008 at 1:53 PM, Arnaud Delobelle <arnodel at googlemail.com>
wrote:

> Arnaud Delobelle <arnodel at googlemail.com> writes:
>
> > "Alex Gusarov" <alex.m.gusarov at gmail.com> writes:
> >
> >>>  class Event(object):
> >>>
> >>> Always subclass object, unless you have a very compelling reason not
> to,
> >>> or you are subclassing something else.
> >>>
> >>
> >> I've thought that if I write
> >>
> >> class Event:
> >>     pass
> >>
> >> , it'll be subclass of object too, I was wrong?
> >
> > You are wrong for Python 2.X, but right for Python 3 where old-style
> > classes are gone for good.
> >
> > What you define with the statement
> >
> >     class Event: pass
> >
> > is an 'old-style' class.  Witness:
> >
> >     >>> class Event: pass
> >     ...
> >     >>> class NewEvent(object): pass
> >     ...
> >     >>> type(Event)
> >     <type 'classobj'>
> >     >>> type(NewEvent)
> >     <type 'type'>
> >     >>> type(Event())
> >     <type 'instance'>
> >     del>>> type(NewEvent())
> >     <class '__main__.NewEvent'>
> >
> > All old-style classes are actually objects of type 'classobj' (they
> > all have the same type!), all their instances are all of type 'instance'.
>
> Oops somthing disappeared in the copy/paste process:
>
>    >>> class FooBar: pass
>    ...
>
> >     >>> type(FooBar) == type(Event)
> >     True
> >     >>> type(FooBar()) == type(Event())
> >     True
> >
> > Whereas instances of new-style classes are of type their class:
> >
> >     >>> class NewFooBar(object): pass
> >     ...
> >     >>> type(NewFooBar) == type(NewEvent)
> >     True
> >     >>> type(NewFooBar()) == type(NewEvent())
> >     False
> >
> > However, in python 2.X (X > 2?), you can force all classes to of a
> > certain type by setting the global variable '__metaclass__'. So:
> >
> >     >>> type(Event) # Event is an old-style class
> >     <type 'classobj'>
> >     >>> __metaclass__ = type
> >     >>> class Event: pass
> >     ...
> >     >>> type(Event) # Now Event is new-style!
> >     <type 'type'>
> >
> > HTH
> >
> > --
> > Arnaud
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From cokofreedom at gmail.com  Wed May 21 09:43:59 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 06:43:59 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
Message-ID: <07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>

>
> And wastes time. regular expressions can become expensive to match - doing
> it twice might be hurtful.
>
> Diez

match = (my_re1.match(line) or my_re2.match(line)) or
my_re3.match(line)

?


From malaclypse2 at gmail.com  Thu May 22 13:12:30 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 22 May 2008 13:12:30 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
References: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
Message-ID: <16651e80805221012k70ade323qb020f9765e2f4a3@mail.gmail.com>

On Thu, May 22, 2008 at 12:32 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?

I believe this is an issue with the precision of IEEE floating point
numbers[1].  Those are the types of numbers used by the hardware
floating point processor on your CPU.  I'm not an expert, by any
stretch of the imagination, but I believe you have two choices to
represent pi as an IEEE double precision float:

3.1415926535897931 (stored as 0x400921FB54442D18) or
3.1415926535897936 (stored as 0x400921FB54442D19)

1: http://en.wikipedia.org/wiki/IEEE_floating-point_standard

-- 
Jerry


From fuzzyman at gmail.com  Sun May 25 10:40:24 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 07:40:24 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com> 
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <8b1335c3-74d1-4ef5-b9c2-28d52837bf76@a70g2000hsh.googlegroups.com>

On May 25, 3:13?pm, Roy Smith <r... at panix.com> wrote:
> In article
> <f838bc64-a4ef-4770-b139-01284e0f8... at t54g2000hsg.googlegroups.com>,
> ?John Roth <johnro... at gmail.com> wrote:
>
> > I really don't care what the OP does in his own projects. My objection
> > is that, if it goes into the standard library, is that it passes a
> > signal that it's good practice to allow dependencies between tests. It
> > most definitely is _not_ good practice.
>
> The OP stated that he wants the tests run in a given order. ?People are
> assuming that's because he has dependencies between his tests. ?Maybe he
> just wants them run in order because it's easier to understand the output
> in a certain order.

No, we're pointing out that running tests in a specific order can
introduce hidden dependencies without you being aware of it. Whilst
this is already the case with unittest, further enshrining it in the
standard library is a bad idea.

As mentioned elsewhere, providing a better reporting mechanism is
probably the way to get better understandable output.

Micahel Foord
http://www.ironpythoninaction.com/

>
> For example, I'm currently working on some low-level data marshalling code
> (in another language). ?This is the sort of stuff which the Python struct
> module handles -- converting between internal form and network
> representation. ?
>
> There is a logical hierarchy of complexity. ?Handling characters is easier
> than handling ints, which is easier than floats, which is easier than
> doubles, and so on (arrays, sets and other composite types). ?If I was
> porting this to a new platform, I would want the unit tests to run in a
> logical order of simple to complex. ?If some assortment of tests failed,
> you want to start debugging the problem on the least complex data types. ?
> If the tests run in a specific order, it's easier to see where to start.
>
> It's not that any test depends on any other test to run, in the sense that
> there's some shared state between them. ?It's just that from a human
> factors point of view, there's a logical order to run them in.
>
> In fact, from a protocol point of view, some of the types really do depend
> on each other. ?We send counted strings, for example, so we can't send a
> string until we know how to send an int (for the string length). ?If the
> first test that fails is the string test, I know right off that the problem
> is not in how we send ints, because that test ran already and it passed.
>
> Earlier, I gave another example of wanting tests to be run in the same
> order as some externally controlled set of functional requirements. ?Again,
> not because the tests have inter-dependencies, but because it just makes it
> easier to interpret the results.
>
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the
> only reason you want to run tests in a specific order.



From castironpi at gmail.com  Thu May 15 07:50:20 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 15 May 2008 04:50:20 -0700 (PDT)
Subject: Greetings
Message-ID: <31e4b80a-4694-4d6e-bf04-a2031cf9472c@m3g2000hsc.googlegroups.com>

Hail, Earthlings,

I have an easy request to take over the newsgroup ("Taking Over the
Newsgroup", "TOTN").  May I?

Pros:
  Lifetime benefits
  Google product
  Talking
Cons:
  World domination
  No crossing
  Social aspect*

Read the fine print:

*Social: Subscribers to TOTN may come talking, telling jokes, and
laughing loudly.  Neighbors subject to smiling.  Vikings prone to
capitalize.

Settings include autovoltic, board, and charm.  Dimensions include 4.
Restrictions apply.  States may vary.  Void where prohibited.  People
include the living.  Times include eternity.  Toys include Legos.

Assume screen is two-dimensions and audio stereo; what are building
Legos?  Assume digital.


From sjmachin at lexicon.net  Thu May 22 18:37:23 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 22 May 2008 15:37:23 -0700 (PDT)
Subject: where is the Write method of ElementTree??
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
Message-ID: <0c26ec10-3492-4ce1-8b5a-ebfb747a9a8e@p39g2000prm.googlegroups.com>

On May 23, 6:56 am, gray.bow... at gmail.com wrote:
> I'm messing around with trying to write an xml file using
> xml.etree.ElementTree.  All the examples on the internet show the use
> of ElementTree.write(), although when I try to use it it's not
> available, gives me ...
>
>    ElementTree(sectionElement).write("section.xml")
> TypeError: 'module' object is not callable
>
> I'm new to python, so I think I'm doing something wrong.. any
> thoughts?
>
> Thanks.'
>
> See code below:
>
> # Create xml structure
> sectionElement = ElementTree.Element("section")
>
> # step through feed result and create elements for each article -
> result[article]
> for article in feedResult:
>     articleElement = ElementTree.Element("article")
>
>     titleElement = ElementTree.SubElement(articleElement, "title")
>     titleElement.text = article['title']
>
>     bodyElement = ElementTree.SubElement(articleElement, "body")
>     bodyElement.text = article['body']
>
>     sectionElement.append(articleElement)
>
> #print ElementTree.tostring(sectionElement)
> ElementTree(sectionElement).write("section.xml")

It's complaining about
    ElementTree(whatever)
As it says, you are trying to call a module.

Looks like you need:
    sectionElement.write("section.xml")

HTH,
John


From johnroth1 at gmail.com  Mon May 26 14:57:13 2008
From: johnroth1 at gmail.com (John Roth)
Date: Mon, 26 May 2008 11:57:13 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com> 
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <e592a7a4-651e-4d0d-929e-f65a9b2f75a0@26g2000hsk.googlegroups.com>

On May 25, 8:13 am, Roy Smith <r... at panix.com> wrote:
> In article
> <f838bc64-a4ef-4770-b139-01284e0f8... at t54g2000hsg.googlegroups.com>,
>  John Roth <johnro... at gmail.com> wrote:
>
> >
>
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the
> only reason you want to run tests in a specific order.

I'm not. As Michael Fnord and Diez Roggisch says in other responses,
there are other solutions to those problems. It would be better to
pursue them if you want a change to the standard library.

John Roth



From fivetwentysix at gmail.com  Sat May 31 00:55:38 2008
From: fivetwentysix at gmail.com (fivetwentysix at gmail.com)
Date: Fri, 30 May 2008 21:55:38 -0700 (PDT)
Subject: compatability
References: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>
Message-ID: <793cc354-0251-4ea3-9ed9-5d873568e434@s33g2000pri.googlegroups.com>

On May 30, 8:32?pm, budcrandall at hotmail.com wrote:
> I'm currently using 3ds Max Design 2009 and Maya. Will Python and
> Plone be compatible with my systems? I would really like to
> incorporate this software. Thank You Bud ? budcrandall at hotmail.com.

Please be more specific as to what type of system...
Python is supported on almost all platforms: Unix, Mac, Windows, etc.
Try visiting http://www.python.org/


From gandalf at shopzeus.com  Fri May  2 05:43:10 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 02 May 2008 11:43:10 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <WSwSj.236857$pM4.38686@pd7urf1no>
References: <WSwSj.236857$pM4.38686@pd7urf1no>
Message-ID: <481AE22E.3040906@shopzeus.com>

Yves Dorfsman wrote:
> I did a few tests with this script:
>
> class byebye:
>
>   def __del__(self):
>     print 'Bye, bye...'
>
>
> x = byebye()
>
>
> x.del() gets executed if:
> -I del x, then run gc.collect()
> -simply exit the script
> -get the script to abort on an exception
>
> But if I kill it with the default signal TERM, the script dies, but I 
> don't get the message, so I am assuming that python isn't taking the 
> time to cleanup, even though that is (was) what TERM was intended for.
TERM signal is unix specific. There is no special syntax/programming 
structure for signals inside the Python language, since it would be 
platform dependent. For simple client programs, usually it is not needed 
to setup signal handlers because they can easily be controlled in other 
ways.

For sensitive resources, instead of writing __del__ methods, you should 
create a "close()" method. Python does this with file objects, DB API 
2.0 with database connection objects etc. Then you can do

res = create_resource()
try:
    use_resource()
finally:
    res.close() # Must free resource, but the object can still be alive...

It is more common to use signals when you have more threads or child 
processes. You can use something like:

import threading
import signal

stop_requested = threading.Event()
exited_on_sigterm = False

def free_all_resources():
    pass # Free your resources here!

def sigterm_handler(signum, frame):
    """Stop the server gracefully when on SIGTERM."""
    global stop_requested
    global exited_on_sigterm
    exited_on_sigterm = True
    stop_requested.set()
    free_all_resources()

def main():
    global stop_requested
    global exited_on_sigterm

    logger = servicelog.getLogger('main',filename=LOGFILENAME)

    logger.info('Setting up the SIGTERM signal handler.')
    signal.signal(signal.SIGTERM, sigterm_handler) # Setup signal handler

    logger.info('Starting watchdog thread')
    watchdog = WatchDog()
    watchdog.start()

    worker1 = create_worker(stop_requested)
    worker2 = create_worker(stop_requested)
    # etc. Prepare things here...
   
    try:
        try:
            server = create_my_server()
            server.serve_until_not_stopped()              
        except Exception, e:
            logger.error(dumpexc(e))
            raise e
    finally:
        stop_requested.set()  # Ask other threads to stop cooperatively
      
        # Join all threads here
        watchdog.join()
        worker1.join()
        worder2.join()
        # etc. wait for all threads to exit cooperatively.
        if exited_on_sigterm:
            logger.warning('Exited on SIGTERM!')

Best,

   Laszlo



From ivan.illarionov at gmail.com  Fri May 16 22:46:11 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 02:46:11 +0000 (UTC)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
Message-ID: <g0lgtj$2ine$2@news.mtu.ru>

On Fri, 16 May 2008 10:13:04 -0400, inhahe wrote:

> Can anyone give me pointers/instructions/a template for writing a Python
> extension in assembly (or better, HLA)?

Look up pygame sources. They have some hot inline MMX stuff.
I experimented with this rescently and I must admit that it's etremely 
hard to beat C compiler. My first asm code actually was slower than C, 
only after reading Intel docs, figuring out what makes 'movq' and 
'movntq' different I was able to write something that was several times 
faster than C.

D language inline asm and tools to make Python extensions look very 
promising although I haven't tried them yet.

-- Ivan


From arnodel at googlemail.com  Fri May 30 09:36:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 30 May 2008 14:36:06 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<mailman.1765.1212149786.12834.python-list@python.org>
Message-ID: <m2k5hbc3sp.fsf@googlemail.com>

"Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:

> On Thu, May 29, 2008 at 3:06 PM, Jason <tenax.raccoon at gmail.com> wrote:
>> I've got Python 3.0 alpha 2.  In this version, it looks like you can
>> define classes in either the old style or new style.  (I snipped the
>> top line a bit in the following example):
>
> Wrong. Py3k Classes are always new-style. They subclass object
> implicitly when no superclass is given.

I think he was talking about syntax, not object types.

-- 
Arnaud


From robert.kern at gmail.com  Tue May  6 18:27:26 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 06 May 2008 17:27:26 -0500
Subject: DISLIN Manual
In-Reply-To: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>
References: <61d60fe6-271a-4f33-b1a7-a2059a08c810@j22g2000hsf.googlegroups.com>
Message-ID: <fvqm0f$67p$1@ger.gmane.org>

adolfo wrote:
> I am at the very beginning of the DISLIN 9.3 Manual:   1.4 Quickplots

I recommend asking the DISLIN author. I don't think that DISLIN is widely used 
in Python.

> Some quickplots are added to the DISLIN module which are collections
> of DISLIN routines for displaying data with one command. For example,
> the function ?plot? displays two-dimensional curves. Example:
> from Numeric import *
> from dislin import *
> x = arange (100, typecode=Float32)
> plot (x, sin (x/5))
> disfin ()
> 
> Problems:
> 
> 1. "from Numeric import * "  statement produced an error message, I
> had to replace it with "from numpy import *"

If DISLIN still uses Numeric rather than numpy, you will probably need to use 
Numeric, too.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From castironpi at gmail.com  Wed May 14 15:45:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 12:45:06 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com> 
	<a372359c-e323-4437-8e9a-0e4c52f81ded@d1g2000hsg.googlegroups.com>
Message-ID: <4fd64aae-d74b-412e-8acc-eee822ba8a47@t54g2000hsg.googlegroups.com>

On May 14, 1:04?pm, castiro... at gmail.com wrote:
> On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
>
> > >?Should tuples be named?
>
> > Yes.
>
> Not clearly should. ?Sequences ought be. ?If you're on the right time
> for both, can't the library hold the B?

On the web, you can.  Both data types can go in the docs... sorry for
the lunacy, I'm hacking.


From castironpi at gmail.com  Tue May 13 09:29:52 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:29:52 -0700 (PDT)
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
	<mailman.1039.1210675135.12834.python-list@python.org>
Message-ID: <bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>

On May 13, 5:38?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <st... at al.com.au> escribi?:
>
> > I have 2 classes in python, the first one runs first and and then the ?
> > first one calls the second class. I want it to run the second class as a ?
> > separate thread but I want the first one to wait until the second class ?
> > is dead.
> > Im having problem in both killing the second class when its done and ?
> > making the first class wait for it to finish.
> > Im very confused on doing threads in python.
>
> I'm confused trying to understand your requirements too. "run a class?"
> Threads execute code, it's easier to think of them as *functions* that are ?
> executed at the same time (or almost).
> So you have a function A that runs first, and creates a second thread that ?
> will execute function B. Then A will wait for B to finish. What do you ?
> want to do in A while it's waiting? Nothing? Then why to use a second ?
> thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt ?
> and others have specific ways to execute backgroung tasks while keeping ?
> the user interface responsive - you should tell us which one you're using ?
> in that case.
>
> --
> Gabriel Genellina

I don't mean to be impertinent, but are you making any cents with the
assignment?  Both free-ers and workers come in here.  I am a free-er
who has reason to doubt that money-driven programs get stuck at that
kind of ambiguity.  I hold that money keeps you out of that mess.

However, there are a number of things we can do to help, but as I, per
se, am only one person, I may not give you the best advice to start
with.  How do you find the 'threading.py' docs?


From bj_666 at gmx.net  Tue May 20 02:41:59 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:41:59 GMT
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
Message-ID: <69fa5nF2uih6aU2@mid.uni-berlin.de>

On Mon, 19 May 2008 20:36:45 -0700, notnorwegian wrote:

> if i want o test:
> if a == 5 and b ==5 and c==5 ... z==5
> 
> is there some synctactic suagr for this?
> 
> rather than maiking one of my own i mean, something built-in like:
> if a,b,c... z == 5:

Since Python 2.5 there's `all()`:

In [81]: a, b, c, d = 5, 5, 5, 6

In [82]: all(x == 5 for x in (a, b, c))
Out[82]: True

In [83]: all(x == 5 for x in (a, b, c, d))
Out[83]: False

Ciao,
	Marc 'BlackJack' Rintsch


From fc14301589 at icqmail.com  Thu May 22 11:23:54 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 23:23:54 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
	<mailman.1466.1211443221.12834.python-list@python.org>
Message-ID: <48359018_2@news.tm.net.my>

On 22:32, mercoled? 21 maggio 2008 python at bdurham.com wrote:

>> appreciate somebody to join and put new views on this project
> 
> Send us a link to one of the sites with your code, eg.
> http://python.pastebin.com
 
Thank you!
Go to : http://it.geocities.com/call_me_not_now/index.html


From bronger at physik.rwth-aachen.de  Thu May 22 17:39:52 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 22 May 2008 23:39:52 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
	<8Ot*rIxds@news.chiark.greenend.org.uk>
Message-ID: <87abii2f2v.fsf@physik.rwth-aachen.de>

Hall?chen!

Matthew Woodcraft writes:

> [...]
>
> At one time, Guido was very keen on the idea of Python as a
> language to introduce non-programmers to (under the 'Computer
> Programming for Everybody' slogan).
>
> I think it's rather a shame that this has more-or-less fallen by
> the wayside. There are lots of people out there producing buggy
> spreadsheets to do things that would be easier to do in a
> programming language.

I don't think so.  It's still reasonably simple to write short
Python programs for e.g. the analysis of measurement results.  But
people simply don't trust cheap non-point'n'click programs which
don't occupy two shelves in the bookstore.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From maciej.blizinski at gmail.com  Tue May  6 04:01:28 2008
From: maciej.blizinski at gmail.com (=?ISO-8859-2?Q?Maciej_Blizi=F1ski?=)
Date: Tue, 6 May 2008 01:01:28 -0700 (PDT)
Subject: Python MIDI in 2008
Message-ID: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>

For the last couple of days, I've been looking for a Python midi
library. I'm generally interested in sending MIDI events via ALSA. It
seems like everything out there is pretty old; packages are from 2003
or 2005. Some packages don't seem to be really used, for instance
portmidi doesn't even support installing it system-wide; you can
compile it and... no make install for you.

What I've found so far:
- http://wiki.python.org/moin/PythonInMusic mostly point to non-
existing or very old software packages
- http://www.mxm.dk/products/public/pythonmidi/ -- no realtime support

Promising packages:
- http://trac2.assembla.com/pkaudio/browser/pyrtmidi -- something
realtime, but I couldn't get the actual Subversion repository address
- http://alumni.media.mit.edu/~harrison/code.html -- seems promising,
but I haven't got it running. You can't (system-wide) install
portmidi, and pyportmidi seems to want portmidi installed.

Is there any other package that allows sending MIDI events in real
time? Did anyone recently got any of the above packages to work?

Maciej


From arnodel at googlemail.com  Mon May 12 04:35:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:35:32 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
	<gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi> 
	<65d792a8-4469-404c-8287-1357170eea05@x35g2000hsb.googlegroups.com>
Message-ID: <08b7a27f-0e00-45cb-9c6c-e58cb7cac7d7@k37g2000hsf.googlegroups.com>

On May 12, 9:30?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
[...]
> # FizzBuzzer in action:
>
> >>> fizzbuzz = FizzBuzzer((3, 'Fizz'), (5, 'Buzz'))
> >>> for val in fizzbuzz[1:21]:
>
> ... ? ? print val
> ...
> 1 21 1
^^^^^^^^
Ignore this, it's debugging output

> 1
> 2
> Fizz
> 4
> Buzz
> Fizz
> 7
> 8
> Fizz
> Buzz
> 11
> Fizz
> 13
> 14
> FizzBuzz
> 16
> 17
> Fizz
> 19
> Buzz>>> abc = FizzBuzzer((2, 'Ah'), (3, 'Bee'), (5, 'Cee'))
> >>> list(abc[25:35])
>
> 25 35 1
^^^^^^^^^
Same

> ['Cee', 'Ah', 'Bee', 'Ah', 29, 'AhBeeCee', 31, 'Ah', 'Bee', 'Ah']

--
Arnaud



From gneuner2/ at /comcast.net  Sat May 10 21:01:21 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Sat, 10 May 2008 21:01:21 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<cMidnY3lU-7Lh7jVnZ2dnUVZ_qqgnZ2d@speakeasy.net>
Message-ID: <3jgc2498f1te1uqh7rrf3odhevkrt3s75e@4ax.com>

On Fri, 09 May 2008 22:45:26 -0500, rpw3 at rpw3.org (Rob Warnock) wrote:

>George Neuner <gneuner2/@/comcast.net> wrote:
>
>>On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
>><xahlee at gmail.com> wrote:
>
>>>? Functions [in Mathematica] that takes elements out of list
>>>are variously named First, Rest, Last, Extract, Part, Take, 
>>>Select, Cases, DeleteCases... as opposed to ?car?, ?cdr?, 
>>>?filter?, ?filter?, ?pop?, ?shift?, ?unshift?, in lisps and
>>>perl and other langs.
>
>>| Common Lisp doesn't have "filter".
>
>Of course it does! It just spells it REMOVE-IF-NOT!!  ;-}  ;-}

I know.  You snipped the text I replied to.  

Xah carelessly conflated functions snatched from various languages in
an attempt to make some point about intuitive naming.  If he objects
to naming a function "filter", you can just imagine what he'd have to
say about remove-if[-not].

George
--
for email reply remove "/" from address


From cokofreedom at gmail.com  Wed May 14 03:24:39 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 14 May 2008 00:24:39 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org> 
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
	<68vfm3F2v0piaU2@mid.uni-berlin.de>
Message-ID: <db85b45e-cfea-4850-941f-594feeeea3bd@m44g2000hsc.googlegroups.com>

On May 14, 8:37 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 13 May 2008 10:20:41 -0700, John Nagle wrote:
> > Matt Nordhoff wrote:
>
> >> Well, you should use "xrange(10)" instead of "range(10)".
>
> >    CPython really is naive.  That sort of thing should be a
> > compile-time optimization.
>
> It's not naive, it can't know at compile time what object is bound to the
> name `xrange` at runtime.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I think he meant you should just use xrange over range at all times.


From larry.bates at websafe.com`  Wed May 21 21:48:44 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Wed, 21 May 2008 20:48:44 -0500
Subject: php vs python
In-Reply-To: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <KfidnYdly6aMTKnVnZ2dnUVZ_qLinZ2d@comcast.com>

notbob wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so.  No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
> 
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever.  I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank.  Anyway, so I change over
> to learning php.  Then I run across that blog, Coding Horror, and start
> reading articles like this:
> 
> http://www.codinghorror.com/blog/archives/001119.html
> 
> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
> much.  I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp.  I've taken basic basic and basic
> C, but am barely literate in html.  Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.  
> 
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?
> 
> nb

Check out the Pylons blog tutorial.  You will have a simple blog up and running 
in less than 30 minutes and have a platform to extend it with as much 
functionality as you want later on.

Larry Bates

Pylons blog tutorial:

http://wiki.pylonshq.com/display/pylonscookbook/Making+a+Pylons+Blog


From cmpython at gmail.com  Fri May  2 15:53:31 2008
From: cmpython at gmail.com (CM)
Date: Fri, 2 May 2008 12:53:31 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.444.1209712086.12834.python-list@python.org>
	<4995d686-881d-4526-9095-3162cbfc4b49@z72g2000hsb.googlegroups.com>
Message-ID: <d90fcbd7-6664-4947-92d9-1f5624cb2e17@k13g2000hse.googlegroups.com>

On May 2, 10:18 am, "andrei.zavi... at gmail.com"
<andrei.zavi... at gmail.com> wrote:
> On May 2, 10:07 am, bvidinli <bvidi... at gmail.com> wrote:
>
>
>
> > i also asked same question in this list last week.
> > i foundhttp://www.cherrypy.org/tobe most suitable for me.
> > it is basic, easy, pure...
> > it contains its own webserver, very easy to start.
>
> > others have many framworks, structures, classes many many..
> > i wanted a pure web programming system , i found cherrypy.
>
> > see you.
>
> > 2008/5/2 jmDesktop <needin4mat... at gmail.com>:
>
> > > I have been to the main python site, but am still confused.  I have
> > >  been using .net, so it may be obvious how to do this to everyone
> > >  else.  I am aware there are various frameworks (Django, Pylons, etc.),
> > >  but I would like to know how to create web pages without these.  If I
> > >  have mod_python or fastcgi on apache, where do I start?  I don't have
> > >  clue where to begin to create a web page from scratch in python.  I am
> > >  sure I will want to access database, etc., all the "normal" stuff, I
> > >  just want to do it myself as opposed to the frameworks, for learning.
>
> > >  Thank you for any help.
> > >  --
> > >  http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > ?.Bahattin Vidinli
> > Elk-Elektronik M?h.
> > -------------------
> > iletisim bilgileri (Tercih sirasina gore):
> > skype: bvidinli (sesli gorusme icin,www.skype.com)
> > msn: bvidi... at iyibirisi.com
> > yahoo: bvidinli
>
> > +90.532.7990607
> > +90.505.5667711
>
> I agree. Try cherrypy. I was able to write simple issue tracking
> system for my project with basic web interface within 2 weeks.
> Prior to this I had no web development experience at all. It was
> really easy with cherrypy to start.


Really?  I tried CherryPy for a few minutes--totally 100% new to
web programming--and though I was pleased at the very basic "Hello,
World!" tutorial, I was unable to figure out how to use the more
advanced tutorials that come with the package.  Could you suggest
how one could learn?  I have experience with Python and GUI app
development, zero on web apps, but want to make widget-having web
apps which uses Python as the logic.

Any tips would be appreciated!

Also, beyond just running a small test web app with the "server"
running on my own computer, what is a basic way to try it out
actually on the web?  Thanks!


From paul.hankin at gmail.com  Sat May 17 06:29:16 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Sat, 17 May 2008 03:29:16 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<g0mab2$pkt$1@aioe.org>
Message-ID: <51336537-0374-470a-a243-c6aa01e1fe9a@59g2000hsb.googlegroups.com>

On May 17, 11:08?am, Ruediger <larud... at freenet.de> wrote:
> urikaluzhny wrote:
> > It seems that I rather frequently need a list or iterator of the form
> > [x for x in <> while <>]
> > And there is no one like this.
> > May be there is another short way to write it (not as a loop). Is
> > there?
> > Thanks
>
> I usually have the same problem and i came up with an solution like that:
>
> from operator import ne
> def test(iterable, value, op=ne):
> ? ? _n = iter(iterable).next
> ? ? while True:
> ? ? ? ? _x = _n()
> ? ? ? ? if op(_x, value):
> ? ? ? ? ? ? yield _x
> ? ? ? ? else:
> ? ? ? ? ? ? raise StopIteration

This is better written using takewhile...
itertools.takewhile(lambda x: x != value, iterable)

But if you really need to reinvent the wheel, perhaps this is simpler?

def test(iterable, value, op=operator.ne):
    for x in iterable:
        if not op(x, value):
            return
        yield x

--
Paul Hankin


From clyfish at gmail.com  Tue May  6 05:19:17 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Tue, 6 May 2008 02:19:17 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
Message-ID: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>

In cmd, I can use find like this.

C:\>netstat -an | find "445"
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  UDP    0.0.0.0:445            *:*

C:\>

And os.system is OK.
>>> import os
>>> os.system('netstat -an | find "445"')
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  UDP    0.0.0.0:445            *:*
0
>>>

But I don't know how to use subprocess.Popen to do this.

from subprocess import Popen, PIPE

p1 = Popen(['netstat', '-an'], stdout = PIPE)
p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
print p2.stdout.read()

It doesn't work.
Because subprocess.Popen execute "find" like this.

C:\>find \"445\"
???? - \

C:\>

It adds a '\' before each '"'.
How to remove the '\'?
Thank you.


From kamhung.soh at gmail.com  Sun May 18 21:52:57 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Mon, 19 May 2008 11:52:57 +1000
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <op.ubdoujwuev04yd@melwxp23>

On Mon, 19 May 2008 08:20:22 +1000, John Salerno  
<johnjsal at NOSPAMgmail.com> wrote:

> Hey all. Just thought I'd ask a general question for my own interest.  
> Every time I think of something I might do in Python, it usually  
> involves creating a GUI interface, so I was wondering what kind of work  
> you all do with Python that does *not* involve any GUI work. This could  
> be any little scripts you write for your own benefit, or what you do at  
> work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

- Enhancing existing products by scripting new features.
- Interface between databases, Excel and text files.
- Convert data between flat files and XML.
- Manage files for build processes.
- Automating processes (e.g. checkout, builds, FTP).

Wish I had some reasons to make a GUI application in Python.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From wuwei23 at gmail.com  Tue May 13 07:13:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 13 May 2008 04:13:01 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
Message-ID: <0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>

On May 13, 8:18 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> May I ask *where* did you read that crazy idea?

Grant Edwards outlines his past behaviour here:
http://groups.google.com/group/comp.lang.python/msg/27553bd56827dc0f

Given that all nine of his postings have inflammatory topics, he's
beginning to sound like a troll.


From bbxx789_05ss at yahoo.com  Sun May 11 16:01:21 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:01:21 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <eb73ea38-9c7b-4e0f-99ca-e6b796004c1b@m36g2000hse.googlegroups.com>

On May 11, 1:28?pm, bc90021 <pyt... at bc90021.net> wrote:
> > ...and the exact error message was?
>
> > Here is a tip: if you want people to help you, then you have to help
> > them to help you. ?Personally, I wouldn't respond to anymore of your
> > questions because you seem incapable of posting the information that was
> > requested.
>
> So far, the people who have answered this post have gone on the
> assumption that I'm stupid. ?I'm not. ?I took perfectly working code,
> cut it from one class, and put it in another. ?It stopped working in the
> second class. ?I've spent days on this and trust me, given what I've
> experienced of the Python community so far, if I didn't have to ask, I
> wouldn't.
>
> (I really must say that so far the help I am getting in the Python
> community is a big let down. ?Whether it's on IRC or here, everyone has
> an arrogance that I don't find anywhere else in the open source
> community, and it seriously makes me question the choice of language that
> I've made.)
>
> The error message was at the top of the thread (am I incapable of posting
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

Well, it appears to me that this error message is different than the
one in your first post.  But maybe I'm on LSD right now and things
will be appear differently tomorrow.

In addition, I've never seen a python error message that doesn't
include the traceback, which you were asked to post, but apparently
are still incapbable of doing.  Also, any line numbers in the error
message should be marked in your code with comments.  That will help
other people help you, remember?





From exarkun at divmod.com  Mon May  5 08:18:35 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 08:18:35 -0400
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <20080505121835.6859.754335118.divmod.quotient.59009@ohm>

On Mon, 5 May 2008 04:57:25 -0700 (PDT), globalrev <skanemupp at yahoo.se> wrote:
>class Foo(object):
>	def Hello(self):
>		print "hi"
>
>object is purple, ie some sort of reserved word.

What your text editor of choice does with syntax coloring is its own business.
It doesn't really have anything to do with the language, except inasmuch as one
might hope that it is *somehow* based on it.

>why is self in black(ie a normal word) when it has special powers.
>replacing it with sel for example will cause an error when calling
>Hello.

Not true.

    exarkun at charm:~$ python -c '
    > class Foo(object):
    >     def Hello(monkeys):
    >         print "hi"
    >
    > Foo().Hello()
    > '
    hi
    exarkun at charm:~$

`self? as the name of the first parameter to an instance method is
convention; beyond that, it has no special meaning in the language.

`object?, on the other hand, is a builtin name which refers to a
particular object.

Jean-Paul


From thomas.troeger.ext at siemens.com  Tue May 20 05:50:22 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 11:50:22 +0200
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <g0u6sv$u68$1@aioe.org>

Paul Rubin wrote:
> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"

[...]

> 
> Thanks.

I think your idea is good, maybe you'd want to build an LZ78 encoder in 
Python (LZ78 is pretty easy), feed it with a long English text and then 
pickle the resulting object. You could then unpickle it on program start 
and encode your short strings with it. I bet there's a working 
implementation around that already that does it ... but if you can't 
find any, LZ78 is implemented in 1 or 2 hours. There was a rather good 
explanation of the algorithm in German, unfortunately it's vanished from 
the net recently (I have a backup if you're interested).

Cheers,
Thomas.


From siva.webhosting at gmail.com  Tue May 27 21:18:39 2008
From: siva.webhosting at gmail.com (siva)
Date: Tue, 27 May 2008 18:18:39 -0700 (PDT)
Subject: More than 500 Free webhostings
Message-ID: <b2da17bb-73ab-46f6-a8ea-c5064fd0eda5@w5g2000prd.googlegroups.com>

Hi Friends

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From castironpi at gmail.com  Thu May 15 20:16:57 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 17:16:57 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com> 
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>
Message-ID: <a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>

On May 15, 6:43?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
> > <bruno.desthuilli... at gmail.com> wrote:
> > > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > > Why can't I write this?
> > > > > > --
>
> > > > > Because your antecedent is undefined?
>
> > > > Of the two ways to play, just to say #define this per se would be a
> > > > bad move, but that's one that comes from the wrong group. ?#define is
> > > > a big scary macro, that python hasn't been using; it's the one-line
> > > > typo. ?Instance:
>
> > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > > Use it to render planes in solids.
>
> > > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > > definitively.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Definitely. ?But, due, I forgot to complete an example.
>
> > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > in C. ?Python:
>
> > life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> > exec( life1 )
>
> > Where does it go?- Hide quoted text -
>
> > - Show quoted text -
>
> I'm supposed to talk about an entropy pool game. ?You can tunnel.- Hide quoted text -
>
> - Show quoted text -

If I had a send-parachute, would all you need be yield?  Let's drop
graphics.


From russblau at hotmail.com  Fri May  9 06:11:24 2008
From: russblau at hotmail.com (Russell Blau)
Date: Fri, 9 May 2008 06:11:24 -0400
Subject: Reusing IDLE file editor
Message-ID: <BAY125-W3100C9BEA05C8054883EE7D2D30@phx.gbl>

I have a need for some simple text-editing capabilities in a Tkinter program, and it occurred to me that IDLE is a Tkinter app that already has what I need in its file editor windows.  I thought it would be nice if I could just use one of those windows as a widget in my application, in place of a plain Tkinter Text widget. I took a quick look at idlelib/EditorWindow.pyw, but it appears that the program is not written as a reusable widget; it's hard-coded to be a toplevel window.

Before I start hacking at it myself, has anyone else modified IDLE to be able to reuse its windows in another application?  Or, alternatively, is there another freely-available (under the Python license or something compatible) Tkinter widget out there that has similar text-editing capabilities?


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From dickinsm at gmail.com  Thu May 22 13:32:17 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 10:32:17 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <3026ddb4-1e9f-488c-a1dc-fe43020d72c7@k37g2000hsf.googlegroups.com>

On May 22, 12:32?pm, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>

There are two effects here:

(1) pi isn't exactly representable as a floating-point number,
so math.pi is merely an approximation to it, and

(2) the value 3.1415926535897931 that you see when you print
pi is itself an approximation to the actual value of math.pi.
math.pi is exactly equal to 884279719003555/281474976710656,
which is the closest C double to the actual value of pi.

The problem in (2) occurs because floating-point numbers
are stored in binary, but printed in decimal.

Mark


From kamhung.soh at gmail.com  Thu May 29 22:12:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 30 May 2008 12:12:36 +1000
Subject: Finding file details...
In-Reply-To: <g1mir9$uvo$1@ger.gmane.org>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<g1mir9$uvo$1@ger.gmane.org>
Message-ID: <g1nnqm$rj3$1@ger.gmane.org>

Roger Upole wrote:
> Kalibr wrote:
>> I've been trying to figure out how to find the details of files
>> (specifically music for now) for a little sorting script I'm making,
>> My aim is to get details on the artist, album, and genre for mp3 and
>> wma files (possibly more in the future). My closest match was when I
>> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
>> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
>> to help (and most of it went over my head). Is there any module I can
>> use to find this sort of data? I'm trying to not make it specialised
>> in music, because I may want to extend this to picture, movie, text
>> etc. files in the future. Any ideas how I could go about this?

I think GetFileVersionInfo() only provides version information for DLL 
and EXE files.

See: http://msdn.microsoft.com/en-us/library/ms646981.aspx

> 
> You can use the shell COM objects to access media properties
> as shown by Explorer.
> 
> import win32com.client
> sh=win32com.client.Dispatch('Shell.Application')
> 
> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> ns=sh.NameSpace(folder)
> 
> ## the column index for Artist may vary from folder to folder
> for c in range(0,255):
>     colname=ns.GetDetailsOf(None, c)
>     if colname=='Artists':  ## This shows up as just Artist on XP
>         for i in ns.Items():
>             artist=ns.GetDetailsOf(i, c)
>             if artist:
>                 print ns.GetDetailsOf(i, 0), artist
>         break
> 
> 
>             Roger

Great tip, Roger!  This solution works for WMA files (I don't have any 
MP3 files handy), so I think it would work for any media files in Windows.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From bj_666 at gmx.net  Fri May 23 01:42:16 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 05:42:16 GMT
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <69n3poF33hfhfU1@mid.uni-berlin.de>

On Thu, 22 May 2008 23:37:45 -0400, John Salerno wrote:

> I know that it is good programming practice to keep GUI and logic code 
> physically separate, by using XRC for example, but I'm wondering if it's 
> also good practice (and even possible) to keep them separate from an 
> implementation standpoint as well. Basically what I mean is, should it 
> be possible to write, for example, the logic for a strategy game without 
> even knowing what the graphics will look like or how they will work?

Yes, that's possible.

> To be more specific, let's say I want to create a simple, 2D strategy 
> game. It will have a board layout like chess or checkers and the player 
> will move around the board. Let's say this is all I know, and perhaps I 
> don't even know *this* for sure either. Is it possible to write the 
> logic for such a game at this point?

Maybe even this is possible.  But here you are not only drawing the line
between GUI and logic but also within the logic part itself because the
board layout isn't (just) a GUI issue.  If you have checkers, hexagons, or
other shapes also has influence on the logic part, because you need
slightly different algorithms for finding ways from tile `A` to tile `B`,
or to decide when a piece is blocked by others, and how the rules to move
pieces around look like.  Just imagine how to modify chess rules to a
board with hexagonal patterns.  It would severely change the logic part.

> Another example could be printing messages to the player. If I need to 
> say "You killed the monster!", is there a general way to write this, or 
> do I need to specifically refer to GUI widgets and methods, etc. in 
> order for it to be displayed properly?

The observer pattern can be used here.  The GUI has to register a callback
function with your logic engine and every time you want to inform the
player about something, your game logic calls that function with the
message.  It doesn't have to know if it will be rendered as graphic on
screen, displayed as text in a terminal, or synthesized as sexy female
computer voice.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Fri May  9 10:11:44 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:11:44 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
Message-ID: <op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 07:58:33 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> I already have Python25, and need to install Python24. I would prefer not to
> remove Python25, but each Python version seems to update the registry, I
> guess (not sure), overwriting each other's entries. Any way to have both
> versions ?

They can coexist peacefully. The last one you install will be the default version to handle .py files automatically.

You may want to create a batch file like this:

<begin python24.cmd>
@c:\python24\python.exe %*
<end python24.cmd>

(and a similar one for 2.5; put them somewhere on your PATH, like c:\windows\system32)
Usage: python24 somescript.py

-- 
Gabriel Genellina



From rossgk at gmail.com  Fri May 30 14:10:17 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 30 May 2008 11:10:17 -0700 (PDT)
Subject: PyDev multiple source files?
Message-ID: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>

Newbie questions on PyDev project setup.   Things are going fine -
writing python code in eclipse/pydev and running them with various
imports etc, doing wxpython stuff blah, blah, blah. My .py code is in
a module, in a package, in a project. It runs fine.

Now I want to be able to break my single source file up into multiple
files to segregate functions, divide up with others, etc, but I don't
know how to configure it. I pulled one simple class definition out of
my single source file and created a new .py file with just that in
there. But now I'm stalled...

What is the equivalent of an 'include' statement. I assume there's
something I put into one .py file to say I'm using stuff in another
local .py file.   I tried using "import" but it doesn't seem to work -
ie code doesn't know about the class in the other file.

Also, how about global vars that are needed across multiple .py files?
Where do I declare them to be understood in all the files that use
that global.

I suspect there is something I do in __init__.py - perhaps the
equivalent of 'include' statements in there with all my globals
stuffed in there too???   I'm lost here, but will continue to play
with it.  Any hints appreciated.  Surely all python developers don't
cram everything into one huge file (I hope).

Ross.


From george.sakkis at gmail.com  Sat May  3 20:43:57 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 17:43:57 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org> 
	<fvirho$15ti$2@news.mtu.ru>
Message-ID: <9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>

On May 3, 7:12?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:
> > On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> >> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>
> >> > Arnaud Delobelle wrote:
>
> >> >> sum() works for any sequence of objects with an __add__ method, not
> >> >> just floats! ?Your algorithm is specific to floats.
>
> >> > This occurred to me also, but then I tried
>
> >> > sum(['abc', 'efg'], '')
>
> >> Interesting, I always thought that sum is like shortcut of
> >> reduce(operator.add, ...), but I was mistaken.
>
> >> reduce() is more forgiving:
> >> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
> > Hm, it works for lists:
> > sum(([1], [2]), [])
> > [1, 2]

So it's not reduce() that is more forgiving, it's sum() that makes an
exception for strings only.


> > However I find the seccond argument hack ugly. Does the sum way have any
> > performance advantages over the reduce way?
>
> Yes, sum() is faster:
>
> $ python -m timeit "" "sum([[1], [2], [3, 4]], [])"
> 100000 loops, best of 3: 6.16 usec per loop
>
> $ python -m timeit "import operator" \
> "reduce(operator.add, [[1], [2], [3, 4]])"
> 100000 loops, best of 3: 11.9 usec per loop

Not really; you measure the import and the attribute access time in
the second case. sum() is 2x faster for adding numbers only:

# Adding integers
python -mtimeit --setup="x=[1]*100" "sum(x)"
100000 loops, best of 3: 4.87 usec per loop
python -mtimeit --setup="from operator import add; x=[1]*100"
"reduce(add,x)"
100000 loops, best of 3: 10.1 usec per loop

# Adding floats
python -mtimeit --setup="x=[1.0]*100" "sum(x)"
100000 loops, best of 3: 5.14 usec per loop
python -mtimeit --setup="from operator import add; x=[1.0]*100"
"reduce(add,x)"
100000 loops, best of 3: 10.1 usec per loop

# Adding tuples
python -mtimeit --setup="x=[(1,)]*100" "sum(x,())"
10000 loops, best of 3: 61.6 usec per loop
python -mtimeit --setup="from operator import add; x=[(1,)]*100"
"reduce(add,x,())"
10000 loops, best of 3: 66.3 usec per loop

# Adding lists
python -mtimeit --setup="x=[[1]]*100" "sum(x,[])"
10000 loops, best of 3: 79.9 usec per loop
python -mtimeit --setup="from operator import add; x=[[1]]*100"
"reduce(add,x,[])"
10000 loops, best of 3: 84.3 usec per loop

George


From mypromise at sina.com  Wed May 21 10:26:49 2008
From: mypromise at sina.com (zhf)
Date: Wed, 21 May 2008 22:26:49 +0800
Subject: how to proccess the blank in the path on linux
Message-ID: <48343129.4060205@sina.com>

I want ro walk a directory and its sub directory on linux,
to find some shell script file, and run them, but I found some path belong
blank charactor, such as '8000 dir', if I write as follow, I got error
"no such file"
path = '8000 dir'
for root, dirs, files in os.walk(path):
cmd = ' '
cmd = 'cd ' + root
os.system(cmd)

How can I repair it?

thanks, best regards.





From paddy3118 at googlemail.com  Sun May 11 01:30:45 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:30:45 -0700 (PDT)
Subject: firefox add-on to grab python code handily?
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <0731c156-e28b-4a7d-bb24-af85bfa5ce8a@x41g2000hsb.googlegroups.com>

On May 10, 8:58 am, CM <cmpyt... at gmail.com> wrote:
> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
>
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
>
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
>
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?

Take a look at the crunchy project: http://crunchy.sourceforge.net/

- Paddy.


From gagsl-py2 at yahoo.com.ar  Fri May  2 15:16:57 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:16:57 -0300
Subject: Searching and replacing text ?
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
Message-ID: <op.uajjujs6x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:51:42 -0300, Oltmans <rolf.oltmans at gmail.com>  
escribi?:

> Hi,
>
> I'm new to Python (and admittedly not a very good programmer) and I've
> come across a scenario where I've to search and replace text in a
> file.
>
> For the sake of an example, I'm searching for every occurence of the
> text
> [[http://www.hotmail.com -> Hotmail]]
>
> I've to replace it with
> [http://www.hotmail.com Hotmail]
>
> I've come up with following scheme
> p=re.compile(r'\[\[')
> q=re.compile(r'->')
>
> p.sub('[',txt)
> q.sub('\b',txt)

Is it a constant text? Then use the replace method of string objects: no  
re is needed.

text = "This is [[http://www.hotmail.com -> Hotmail]] some text"
print text.replace("[[http://www.hotmail.com -> Hotmail]]",  
"[http://www.hotmail.com Hotmail]")
output: This is [http://www.hotmail.com Hotmail] some text

Or, do you want to find '[[' followed by some word followed by ' -> '  
followed by another word followed by ']]'?

r = re.compile(r'\[\[(.+?)\s*->\s*(.+?)\]\]')
print r.sub(r'[\1 \2]', text)
(same output as above)

() in the regular expression indicate groups, that you can reference as \1  
\2 in the replacement string.

-- 
Gabriel Genellina



From ptmcg at austin.rr.com  Sat May 24 09:42:56 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:42:56 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <43381ce3-3505-482e-82ac-0643eb57e25b@k37g2000hsf.googlegroups.com>

On May 21, 4:38?am, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
> ? # use match
> elsif (match = my_re2.match(line)):
> ? # use match
> elsif (match = my_re3.match(line))
> ? # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

Try this.

-- Paul

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return bool(self.value)


import re

tv = TestValue()
integer = re.compile(r"[-+]?\d+")
real = re.compile(r"[-+]?\d*\.\d+")
word = re.compile(r"\w+")

for inputValue in ("123 abc 3.1".split()):
    if (tv << real.match(inputValue)):
        print "Real", float(tv.value.group())
    elif (tv << integer.match(inputValue)):
        print "Integer", int(tv.value.group())
    elif (tv << word.match(inputValue)):
        print "Word", tv.value.group()

Prints:

Integer 123
Word abc
Real 3.1




From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 12:17:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 18:17:34 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <483ae29c$0$21027$426a74cc@news.free.fr>

erik.oosterwaal at gmail.com a ?crit :
> Hi All,
> 
(snip history and reasons to switch from old-style ASP).
> 
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
> 
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.

There are a couple points I don't get here. Mostly: how is your 
application logic separated from the presentation logic if you "intermix 
code directly into the HTML" ? Or are you pages including the libs, 
getting the appropriate data out of the DB, and then including another 
file acting as a template ? If so, then how are you're "pages" different 
from MVC frameworks controllers ?

> As Python would be the language I prefer over Ruby, I thought I'd ask
> here to see if anyone in the Python community knows if such a
> development-framework exists in Python.

mod_python + PSP would come to mind - it's probably the closer thing to 
ASP/PHP you'll get in Python - but I don't know if PSP is still 
maintained, and I would by no mean consider such a "framework" for new 
projects (and FWIW, PSP is a bit ugly IMHO).

Mako is a templating engine that let you have quite a lot of Python code 
inside your templates, but you'll still need a separate controller for 
most things.

Writing a wsgi-compatible framework that uses Mako as template engine 
and dispatch to controllers based on the filesystem might not be a very 
difficult task, but even then, I don't see the point of such an 
arrangement - specially when we already have more web frameworks than 
keywords...

> For example, does IronPython
> also use the same web forms approach as asp.net using VB? The
> frameworks I looked at (Django, Pylons) seem to be able to use
> different templating engines, does that mean it's just a question of
> finding the right one?

Django and Pylons both impose a distinct controller.

> Also, for Python there is also the problem of meaningful indentation.
> I'm not even sure if it's possible to use Python directly inside HTML,
> because indentation would be at the very least tricky to maintain.

It's indeed one of the ugly parts of PSP.

> I'm
> kind of hoping here that there are some solutions to these problems
> available in Python.
> 
>  Any help would be greatly appreciated.

I sincerely think you'd be better trying to get up and running with one 
of the existing MVC solutions like Django or Pylons. Now there are quite 
a couple other web frameworks in Python, you know - so perhaps you 
should have a closer look at them ?

My 2 cents...


From fuzzyman at gmail.com  Sun May 25 16:03:14 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 13:03:14 -0700 (PDT)
Subject: 22.800000 and a 1 on the end!!??
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <b2e867c0-f1c9-44a9-b481-5489cee214e6@m73g2000hsh.googlegroups.com>

On May 25, 8:58?pm, notnorweg... at yahoo.se wrote:
> >>> x = 5
> >>> x /= 2
> >>> x
> 2
> >>> x *=11.4
> >>> x
>
> 22.800000000000001
>
> ok where does the 1 in the come from?

Floating point arithmetic.

Michael Foord
http://www.ironpythoninaction.com/


From ivan.illarionov at gmail.com  Sun May 25 14:46:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 11:46:32 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
Message-ID: <68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>

Jerry Stuckle wrote:
> Lie wrote:
> > On May 22, 12:28 pm, NC <n... at iname.com> wrote:
> >> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
> >>> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't.
> >>> Yet, I want learn the guts of it instead of just booting up some
> >>> wordwank or whatever.
> >> Here's a simple computation to consider... ?WordPress' codebase is
> >> approximately a megabyte of PHP code and megabyte of JavaScript code.
> >> Assuming that the average line of that code is 50 characters long, you
> >> are looking at 20,000 lines of code in PHP and as many in JavaScript.
> >> Based on the notion that the average developer out there writes 100
> >> lines a day, either you're in for a two-year project or your product
> >> is going to have seriously reduced functionality compared to something
> >> that's been freely available for years. ?What's your choice?
>
> > Nope, the core functionality of a blogging software could be
> > replicated in just a few lines of PHP codes, in the range of tens to
> > hundreds of lines. If you're creating your own blogging software, you
> > wouldn't seriously think you'd recreate all those things such as
> > pingbacks, commenting system, etc, etc, etc. No, you'd start with some
> > basic core functionalities: a few simple server side includes only.
>
> As he said - it's either a two man-year project or your product is going
> to have seriously reduced functionality. ?It looks like you are opting
> for the latter.
>
> Also, you still need to write the server-side includes. ?But they won't
> do nearly enough for everything WordPress does.

If the OP wants to learn the guts of the blog or to implement the blog
from scratch, Python/Django would be a better choice than PHP. The
reason is that he can reuse and customize existing high quality
components for all these auth/auth, admin, comments, etc, etc, etc.
Another reason is that Python and Django encourage very clean design
while PHP is too often ends up in "spaghetti SQL wrapped in spaghetti
PHP wrapped in spaghetti HTML". 2 man/year in PHP == 2 man/week in
Python/Django.

And there are Python/Django blog applications that already do almost
everything (and maybe more) that WordPress does. http://byteflow.su/
is one of them (IMHO the most promising).

Ivan



From deets at nospam.web.de  Sun May  4 17:27:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 23:27:28 +0200
Subject: pygame.mixer.load not working
In-Reply-To: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>
References: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>
Message-ID: <686o25F2rb5iqU1@mid.uni-berlin.de>

globalrev schrieb:
> import pygame
> 
> pygame.mixer.music.load(example1.mp3)
> pygame.mixer.music.play(loops=1, start=0.0)
> 
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 3, in
> <module>
>     pygame.mixer.music.load(example1.mp3)
> NameError: name 'example1' is not defined
> 
> example1 is in the same directory as the script

http://docs.python.org/tut/node5.html#SECTION005120000000000000000

Diez


From arnodel at googlemail.com  Sat May 31 11:48:40 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 16:48:40 +0100
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<m2fxryc2db.fsf@googlemail.com>
	<7a41e745-956b-4582-bd61-eac699f1d892@34g2000hsf.googlegroups.com>
Message-ID: <m27idabhk7.fsf@googlemail.com>

George Sakkis <george.sakkis at gmail.com> writes:

> On May 31, 4:19?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> Cameron <cameronla... at gmail.com> writes:
>> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
>> > Graham article</a> and he builds an accumuator generator function in
>> > the appendix. His looks like this:
>>
>> > <pre>
>> > def foo(n):
>> > ? s = [n]
>> > ? def bar(i):
>> > ? ? s[0] += i
>> > ? ? return s[0]
>> > ? return bar
>> > </pre>
>>
>> > Why does that work, but not this:
>>
>> > <pre>
>> > def foo(n):
>> > ? s = n
>> > ? def bar(i):
>> > ? ? s += i
>> > ? ? return s
>> > ? return bar
>> > </pre>
>>
>> Others have explained why, but this looks like "pythonized LISP" to
>> me. ?I would rather use a generator function:
>>
>> def foo(n):
>> ? ? while True:
>> ? ? ? ? n += yield n
>>
>> Although the problem is that you can't send it values the first time
>> round!
>>
>> >>> bar = foo('s')
>> >>> bar.next()
>> 's'
>> >>> bar.send('p')
>> 'sp'
>> >>> bar.send('am')
>>
>> 'spam'
>>
>> But:
>>
>> >>> bar = foo(3)
>> >>> bar.send(2)
>>
>> Traceback (most recent call last):
>> ? File "<stdin>", line 1, in <module>
>> TypeError: can't send non-None value to a just-started generator
>
> I find the "pythonized LISP" solution more understandable, even
> without the initial next() requirement. YMMV
>
> George

In that case a class may be better?  IMHO, what is such a natural
idiom in LISP does not translate well literally into Python.

class Foo(object):
    def __init__(self, n):
        self.s = n
    def __call__(self, i)
       self.s += i
       return self.s
 
Anything to avoid the mutable container trick!  Of course 'nonlocal'
takes care of this in py3k.  I have missed the absence of 'nonlocal' a
lot, but now that it is around the corner, I grow less sure about it.

-- 
Arnaud


From wizzardx at gmail.com  Sun May 25 13:36:06 2008
From: wizzardx at gmail.com (David)
Date: Sun, 25 May 2008 19:36:06 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <5hv*dSKds@news.chiark.greenend.org.uk>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
	<mailman.1555.1211681333.12834.python-list@python.org>
	<5hv*dSKds@news.chiark.greenend.org.uk>
Message-ID: <18c1e6480805251036u22ec09f9y1d846b4698d6c09a@mail.gmail.com>

Hi again.

Taking the advice of numerous posters, I've been studying BDD further.

I spent a while looking for a Python library which implemented BDD in
Python similar to jbehave, as described by Dan North on this page:
http://dannorth.net/introducing-bdd. I did find a few, but they either
had awful-looking syntax, or they were overly-complicated. So I
decided that using regular unit tests (via nosetest) was good enough,
even if it doesn't have support for stories, scenarios, givens, etc,
and it uses words with "Test" in it instead of "Behavior".

One thing I just tried was to put together a basic stack class
following BDD, with nosetest. I got the idea from this page:
http://www.ibm.com/developerworks/web/library/j-cq09187/index.html

It was an interesting exercise, and I'm encouraged to try it further.

I ended up with these 2 modules:

======test_stack.py========

from nose.tools import raises
import stack

class TestStackBehaviour:
    def setup(self):
        self.stack = stack.Stack()
    @raises(stack.Empty)
    def test_should_throw_exception_upon_pop_without_push(self):
        self.stack.pop()
    def test_should_pop_pushed_value(self):
        self.stack.push(12345)
        assert self.stack.pop() == 12345
    def test_should_pop_second_pushed_value_first(self):
        self.stack.push(1)
        self.stack.push(2)
        assert self.stack.pop() == 2
    def test_should_leave_value_on_stack_after_peep(self):
        self.stack.push(999)
        assert self.stack.peep() == 999
        assert self.stack.pop() == 999
    def test_should_pop_values_in_reverse_order_of_push(self):
        self.stack.push(1)
        self.stack.push(2)
        self.stack.push(3)
        assert self.stack.pop() == 3
        assert self.stack.pop() == 2
        assert self.stack.pop() == 1
    @raises(stack.Empty)
    def test_peep_should_fail_when_stack_is_empty(self):
        self.stack.peep()
    def test_should_be_empty_when_new(self):
        assert len(self.stack) == 0

======stack.py========

class Empty(Exception):
    """Thrown when a stack operation is impossible because it is empty"""
    pass

class Stack:
    """Basic implementation of a stack"""
    def __init__(self):
        self._data = []
    def push(self, value):
        """Push an element onto a stack"""
        self._data.append(value)
    def pop(self):
        """Pop an element off a stack"""
        try:
            return self._data.pop()
        except IndexError:
            raise Empty
    def peep(self):
        """Return the top-most element of the stack"""
        try:
            return self._data[-1]
        except IndexError:
            raise Empty
    def __len__(self):
        """Return the number of elements in the stack"""
        return len(self._data)

===================

Does the above look like a decent BDD-developed class?

Is it ok that there are no 'scenarios', 'stories', 'having', 'given',
etc references?

Some pages suggest that you should use so-called contexts
(EmptyStackContext, StackWithOneElementContext, FullStackContext,
AlmostFullStackContext, etc).

Would you normally start with a basic TestStackBehavoiur class, and
when Stack becomes more complicated, split the tests up into
TestEmptyStackContext, TestStackWithOneElementContext, etc?

Another thing I noticed is that some of my test cases were redundant.
Would you normally leave in the redundant tests, or remove the ones
which are included in the more general test?

Also, I have another question. How do you unit test event loops?

eg: Your app is a (very basic) service, and you want to add some
functionality (following BDD principles)

Here's an example unit test:

class TestServiceBehavior:
    def setup(self):
       ...
    def test_handles_event_xyz(self):
       ...

If your service is normally single-threaded, would your unit test need
to start the service in a separate thread to test it?

Another method would be to update the event loop to enable unit
testing. eg only iterate once if a 'being_tested' variable is set
somewhere.

None of the above are ideal. What is a good way to unit test event loops?

David.


From arnodel at googlemail.com  Sun May 25 16:30:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 25 May 2008 21:30:06 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
Message-ID: <m2skw65dpt.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> dear pythonistas,
>
> So imagine that we have a set of sets S. If we pick arbitrarily one
> set, s0, what are all the combinations of other sets in S which when
> combined by set operations result in s0?
>
> s0 = set([1])
> s1 = set([1,2])
> s2 = set([2])
> S = set([s0,s1,s2])
> one answer we're searching for is s0 = s1 - s2
>
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...) and arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any operation or function which
> takes and returns sets.
>
> I think this problem is related to integer partitioning, but it's not
> quite the same. The range of answers has a little combinatorial
> explosion problem as S gains new members. In my problem, len(S) is
> usually on the order of 1M, and in the worst case, 10M, and there are
> on the order of 10k elements.
>
> My attempts to come up with an algorithm have not succeeded. Any ideas
> occur to you folks? -- PB.

Unless your sets have some sort of pattern, it sounds to me like this
problem is at least exponential...  Good luck!

-- 
Arnaud


From johnjsal at gmailNOSPAM.com  Sun May 11 16:16:53 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Sun, 11 May 2008 16:16:53 -0400
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
Message-ID: <48275446$0$11628$607ed4bc@cv.net>

XLiIV wrote:

> The range() function returns a list and list is a sequence, isn't?

I think you're missing the point. To me, there seems to be a fundamental 
difference between these two things:

---

people = ['Sam', 'Bob', 'Fred']

for name in people:
     print name

---

AND

---

num = 33

for x in xrange(10):
     print num += 1

---

To me, the first example is a pure use of the for loop. You are 
iterating through an object and *using* the items you are stepping through.

The second example, however, is simply doing something 10 times, and 
what it's doing has nothing to do with 'x' or xrange. So it seems like 
an abuse of the for loop.


From castironpi at gmail.com  Tue May  6 23:52:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 20:52:00 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <d30b2c74-ba6a-45a9-9b63-3a682cf7dfec@b1g2000hsg.googlegroups.com>

On May 6, 10:20?am, krumbleb... at gmail.com wrote:
> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.
>
> I know how to reverse a list (with the reverse method - very handy),
> but it doesn't seem possible to reverse a dict.

It is not.  Dictionaries provide constant time add and remove, -not-
order.  Are you sorting based on key or value?

If you want a sorted state and sorted remove, use the 'bisect' module.

> I suspect what I need to do is somehow go from:
>
> thelist=list(thedict)
> thelist.reverse()
> thedict=dict(thelist)
>
> Does anyone know how to convert / or reverse a dict?
>
> thanks
>
> kb.



From bj_666 at gmx.net  Fri May  9 05:52:03 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 May 2008 09:52:03 GMT
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <68il63F2su97jU5@mid.uni-berlin.de>

On Fri, 09 May 2008 02:13:34 -0700, XLiIV wrote:

> Let's take a look at two ways of thinking...
> the standard one which is well-known and loved by almost everyone :)
> and that crazy concept below which suprised evan me :wacko:
> 
> <code>
> import time
> 
> ftime = time.time()
> localtime = time.localtime(ftime)
> localtime = list(localtime[:3])
> localtime = [str(i) for i in localtime]
> print '-'.join(localtime)
> </code>
> 
> It's harder to read than the below concept, isn't?
> Maybe I didn't used to this way of thinking yet. I hope it'll change
> soon or i'll quit ;)

Maybe it's also harder to read than this::

  print '-'.join(map(str, time.localtime()[:3]))

Of course, if you don't mind the extra padding zeroes in day and month::

  print time.strftime('%Y-%m-%d')

> <almost code>
> time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
> -> '-'.join()
> </almost code>

You are a little bit inconsistent with the arguments.  `g` is explicitly
mentioned in ``list(g)``.  But why the intermediate names at all?

> My example conclusion and not-ansewered-yet question...
> -it's nice to read and choosing the good names to variables aren't so
> important
> -what is the purpose of the variables here? :)

Exactly.  But look at my snippet above: No intermediate names either.

> I realize that there is no chance to implement it, but I really want
> to share it :]

Maybe you should look into languages like SmallTalk or Io where everything
is done with method calls.  Your example in Io::

  Date now do("#{year}-#{month}-#{day}" interpolate linePrint)

Ciao,
	Marc 'BlackJack' Rintsch


From admin at remembernobody.com  Fri May  2 05:34:27 2008
From: admin at remembernobody.com (admin at remembernobody.com)
Date: Fri, 2 May 2008 02:34:27 -0700 (PDT)
Subject: Python documentation
Message-ID: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>

Hello,

I have been learning python for some time using the dive into python
book. I am interested to know if anyone can recommend a book which
covers more advanced topics like threading and potentially GUI style
coding.

Regards,

Ronald


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 03:19:52 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 09:19:52 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>
	<e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>
Message-ID: <48327b93$0$15299$426a74cc@news.free.fr>

Henrique Dante de Almeida a ?crit :
> On May 19, 5:35 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>>>  The situation would be simpler if there were good well-known toolkits
>>> for optimization in python (like numpy for matrix operations), but
>>> that's not the case.
>> There's at least Psyco (if you're willing and able to restrict
>> yourself from using some of the most dynamic parts of Python - which
>> might not be a problem here).  One could also mention stuff like Pyrex
>> and Cython.
> 
>  I meant toolkits for "optimization problems", not "code
> optimization".

oops, sorry.


From castironpi at gmail.com  Wed May 14 12:58:46 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 09:58:46 -0700 (PDT)
Subject: What is self.file = file for?
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
	<f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com> 
	<482a9438$0$21057$426a34cc@news.free.fr>
Message-ID: <08469c91-45f2-481e-8281-44f490e851f2@a1g2000hsb.googlegroups.com>

On May 14, 2:26?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> afrobeard a ?crit :
>
> (top-post corrected. Please, do not top-post).
>
>
>
>
>
> > On May 14, 3:08 am, wxPytho... at gmail.com wrote:
> >> Hello!
>
> >> I have trouble understanding something in this code snippet:
>
> >> class TextReader:
> >> ? ? """Print and number lines in a text file."""
> >> ? ? def __init__(self, file):
> >> ? ? ? ? self.file = file
> >> ? ? ? ? .
> >> ? ? ? ? .
> >> ? ? ? ? .
>
> >> When would you do a thing like ?self.file = file ?? I really don't
> >> find an answer on this. Please help me understand this.
>
> > If you are familiar to C++ or a similar language, the concept of the
> > this pointer might not be alien to you. self in this context is
> > basically a reference to the class itself.
>
> Nope. It's a reference to the instance.
>
> > Hence self.file is creating
> > a class member
>
> Nope. It's setting an instance attribute.
>
> > and setting to the input from file.
>
> > As Gary pointed out, during initialization, only the latter parameter
> > i.e. file is being passed to __init__
>
> Nope. Obviously, both parameters are passed - else it just wouldn't
> work. Given an object 'obj' instance of class 'Cls', you can think of
> obj.method(arg) as a convenient shortcut for Cls.method(obj, arg).- Hide quoted text -
>
> - Show quoted text -

I am at the point of open-source, and I agree.


From jurgenex at hotmail.com  Fri May  9 03:01:02 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Fri, 09 May 2008 07:01:02 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>
	<68ia3oF2t5308U1@mid.individual.net>
Message-ID: <7ft7249u3a7vmgm50pi7sfcp7m8fevoq2m@4ax.com>

"Waylen Gumbal" <wgumgfy at gmail.com> wrote:
> so why not just skip the thread or toss the OP in your 
>killfile so you don't see his postings. 

Done years ago.

>If others want to discuss his 
>topics, who are you or I to tell them not to?

They are very welcome to do so in an appropriate NG for those topics.

jue


From exarkun at divmod.com  Mon May 12 22:35:08 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 22:35:08 -0400
Subject: Popen pipe hang
In-Reply-To: <64cf0966-5e39-473c-8923-7a81ff99f905@u6g2000prc.googlegroups.com>
Message-ID: <20080513023508.6859.732328355.divmod.quotient.62766@ohm>

On Mon, 12 May 2008 17:35:44 -0700 (PDT), schickb <schickb at gmail.com> wrote:
>I'm trying to pipe data that starts life in an array('B') object
>through several processes. The code below is a simplified example. The
>data makes it through, but the wait() always hangs. Is there a better
>way to indicate src.stdin has reach EOF?
>
>from subprocess import Popen, PIPE
>from array import array
>
>arr = array('B')
>arr.fromstring("hello\n")
>
>src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
>dst = Popen( ["cat"], stdin=src.stdout)
>arr.tofile(src.stdin)
>src.stdin.close()
>dst.wait()

Alas, you haven't actually closed src's standard input.  Though you did
close src.stdin, you didn't close the copy of it which was inherited by
dst!  So though the file descriptor is no longer open in your main process,
it remains open due to the reference dst has to it.  You can fix this by
having Popen close all file descriptors except 0, 1, and 2 before it execs
cat - pass close_fds=True to the 2nd Popen call and you should get the
behavior you want.

Jean-Paul


From mensanator at aol.com  Fri May 23 14:44:19 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 23 May 2008 11:44:19 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org> 
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com> 
	<48365893$0$11617$607ed4bc@cv.net>
Message-ID: <7a73869e-6091-430b-a68e-eef7d831ea5d@59g2000hsb.googlegroups.com>

On May 23, 12:39?am, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> Mensanator wrote:
> > On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> >> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> >> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>
> > If you actually need that many digits, use a different library.
>
> >>>> import gmpy
>
> >>>> print gmpy.pi(64) # 64 bit precision
> > 3.14159265358979323846
> >>>> print gmpy.pi(128) # 128 bit precision
> > 3.141592653589793238462643383279502884197
> >>>> print gmpy.pi(16384) # 16384 bit precision
> > 3.14159265358979323846264338327950288419716939937510582097494459
> > 23....
>
> Heh!
>
> I wonder who needs that many digits?

Pi digits specifically, or that many digits
in general? I generally don't use pi, but
I routinely work with numbers having that
many digits.

>
> Certainly not number theorists (they need a LOT more).

That depends on the problem. What's important
to the number theorist is not how many digits
there are, but the fact that every single one
of them is significant. If pi is needed, the
mantissa must have as many digits as the number
to avoid loss of significance.

For example, in the Collatz Conjecture, there
is a nice closed form equation to tell you the
ith, kth Generation Type [1,2] Mersenne Hailstone:

a(i,k) = 2**(6*((i-1)*9**(k-1)+(9**(k-1)-1)/2+1)-1)-1

Which for a modest request like a(1,6) returns
a number with 53,338 decimal digits. And you
can't even compute the 11th generation without
getting an "Outrageous Exponent" exception
(the exponent exceeded 32 bits).

Now, it's true you can't count up to such a
number, but you can readily determine its Collatz
Sequence as they are logarithmic (for a(1,6) the
sequence contains 854,697 odd numbers and about
twice that many even numbers).

And since a(1,6) has only 177,149 bits, it's
easy to verify that it is, indeed, the first
of the infinite members of the 6th generation.

> Certainly not
> physicists -- they need about 30 digits to be within 1% of any
> measurement from molecules to galaxies. ?Certainly not engineers, they
> need half the digits that physicists need. ?Cryptographers are making a
> dire mistake if they are using PI in any computations (possible
> exception for elliptic curves -- see number theorists, above) ... so --
> other than PI-philes, who needs PI to thousands of digits?- Hide quoted text -
>
> - Show quoted text -



From castironpi at gmail.com  Wed May  7 13:57:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 10:57:41 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
Message-ID: <36a899fb-4480-437e-b1f5-0c4676575bbe@r66g2000hsg.googlegroups.com>

On May 7, 12:30?pm, Paul Melis <p... at floorball-flamingos.nl> wrote:
> umpsu... at gmail.com wrote:
> > Here is my code for a letter frequency counter. ?It seems bloated to
> > me and any suggestions of what would be a better way (keep in my mind
> > I'm a beginner) would be greatly appreciated..
>
> Not bad for a beginner I think :)
>
>
>
>
>
> > def valsort(x):
> > ? ?res = []
> > ? ?for key, value in x.items():
> > ? ? ? ? ? ?res.append((value, key))
> > ? ?return res
>
> > def mostfreq(strng):
> > ? ?dic = {}
> > ? ?for letter in strng:
> > ? ? ? ? ? ?if letter not in dic:
> > ? ? ? ? ? ? ? ? ? ?dic.setdefault(letter, 1)
> > ? ? ? ? ? ?else:
> > ? ? ? ? ? ? ? ? ? ?dic[letter] += 1
> > ? ?newd = dic.items()
> > ? ?getvals = valsort(newd)
> > ? ?getvals.sort()
> > ? ?length = len(getvals)
> > ? ?return getvals[length - 3 : length]
>
> > thanks much!!
>
> Slightly shorter:
>
> def mostfreq(strng):
> ? ? ?dic = {}
> ? ? ?for letter in strng:
> ? ? ? ? ?if letter not in dic:
> ? ? ? ? ? ? ?dic[letter] = 0
> ? ? ? ? ?dic[letter] += 1
> ? ? ?# Swap letter, count here as we want to sort on count first
> ? ? ?getvals = [(pair[1],pair[0]) for pair in dic.iteritems()]
> ? ? ?getvals.sort()
> ? ? ?return getvals[-3:]
>
> I'm not sure if ?you wanted the function mostfreq to return the 3 most
> frequent letters of the first 3 letters? It seems to do the latter. The
> code above uses the former, i.e. letters with highest frequency.
>
> Paul- Hide quoted text -
>
> - Show quoted text -

I think I'd try to get a deque on disk.  Constant indexing.  Store
disk addresses in b-trees.  How long does 'less than' take?  Is a
sector small, and what's inside?


From torriem at gmail.com  Sun May 11 12:34:50 2008
From: torriem at gmail.com (Michael Torrie)
Date: Sun, 11 May 2008 10:34:50 -0600
Subject: Module python-magic on/for Windows?
In-Reply-To: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <4827202A.5030104@gmail.com>

Larry Hale wrote:
> Now I *presume* my problem (at this point) is that I need to have
> libmagic named as "magic1.dll" -wherever- this module is looking for
> it.  I'm just not sure, let alone if this is true, WHERE Python/
> modules expect to find such things.
> 
> Also, which version(s)/file(s) should be placed where, or...??

The dll you are looking for is here:

http://downloads.sourceforge.net/gnuwin32/file-4.21-bin.zip?modtime=1180175868&big_mirror=1

The .dll.a file you mention is just a linker stub for when you want to
compile against it (as you are doing when building python-magic).

The magic1.dll file in the file-4.21-bin.zip package should be placed
anywhere in the path.  Since you'll be using it with python, you could
probably stick it in the python25/bin folder (where ever your python
system is installed).




From regnarg at seznam.cz  Tue May 13 12:59:22 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Tue, 13 May 2008 18:59:22 +0200
Subject: Fill memeory with endless loop?
In-Reply-To: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
Message-ID: <20080513165922.GA10304@sirius>

On ?t, kv? 13, 2008 at 06:49:33 +0200, globalrev wrote:
> if i do something like
> while 1:
>     print "x"
> 
> will the program ever stop because it runs out of memory?

No, there is no reason to run out of memory. This will simply
make an everlasting x-printer and there is no need to store
anything (except output buffers, terminal scrollback, etc.,
but all of this is temporary and of limited size). In case of
adding elements to a list, the memory usage can, of course,
grow unlimitedly. On linux, if the process eats up too much
memory, it gets killed. I do not know about windows, but
they would probably crash with a BSOD or something of that
sort.





From wxPythoner at gmail.com  Sat May 10 16:56:13 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:56:13 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
Message-ID: <f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>

I am stunned that this simple misunderstanding of mine ended in a
mathematical clash of a sort. :)  You guys really blew me away wih
your mathematical knowledge. And also the 0**0 is a thing I've never
thought about trying, until now that is. If the mathematical rule is
that EVERYTHING raised to the power of 0 is 1, then we should accept
that, even in the case of 0**0. This is just the way it is.

I have two another interesting things to discuss about, for which I'll
open new posts on this group. Look for "Python doesn't recognize quote
types" and "Python, are you ill?".


From hat at se-162.se.wtb.tue.nl  Thu May 15 06:48:49 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 15 May 2008 12:48:49 +0200
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <slrng2o58h.854.hat@se-162.se.wtb.tue.nl>

On 2008-05-15, Gabriel <gabe at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
>
> I got this example from page 38 of Beginning Python.

This is a more complicated case of

a = []
b = a

a.append(1)
print b  # Will print "[1]"

This is the case, because both a and b refer to the same list data-value.


In your case, basically what you are doing is

a = []          # a is an empty list (introduced for easier explanation)
tasks = [a]     # tasks is a list with 1 'a'
tasks = tasks*6 # you create 5 additional references to 'a' in 'tasks

ie tasks is now the equivalent of [a, a, a, a, a, a]. It refers to the same 'a'
list 6 times. When you print 'tasks', you actually print the same 'a' value 6
times.


in particular, tasks is **NOT**

a,b,c,d,e,f = [], [], [], [], [], []  # create 6 different empty list values
tasks2 = [a, b, c, d, e, f]

although when you print both tasks, you won't see the difference.


Next, 'tasks[0]' refers to the first list element, that is, value 'a'. To that
list you append an element. In other words, you do "a.append(1)".

However, since tasks has 6 references to the same list 'a', all its members
appear to be changed (but you are really displaying the same value 6 times).


You can query this equality with 'is':

print tasks[0] is tasks[1]  # will print 'True'
print tasks2[0] is tasks2[1]  # Will print 'False'


Sincerely,
Albert


From vivainio at gmail.com  Sat May 24 05:43:23 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sat, 24 May 2008 09:43:23 GMT
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>
	<d9d7b48a-e6f1-4b0d-9fdf-e2d7427fcf48@d77g2000hsb.googlegroups.com>
Message-ID: <87r6bsvxz7.fsf@gmail.com>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:


> I don't know if you'd label it 'elegant', but as far as I'm
> concerned, storing serialized objects as blobs in a relational
> database is mostly non-sense. If I use a relational database, it's
> because it is a *relational* database. If you want an OODB, then we
> have the ZODB, Durus and a couple others.

... not to forget object-relational mappers like SQLAlchemy, SQLObject...


From wizzardx at gmail.com  Sun May  4 13:37:04 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 19:37:04 +0200
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
Message-ID: <18c1e6480805041037p5147d2a7rfe9f6b576985d30b@mail.gmail.com>

>
>  Another way would be to listen to all events sent through X, and act
>  based on the mouse events. VNC does something similar.
>

See the 'record_demo.py' example that comes with python-xlib.


From lists at cheimes.de  Tue May 20 16:43:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 20 May 2008 22:43:53 +0200
Subject: List of disk drives on Windows?
In-Reply-To: <f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>
References: <2008052013180816807-bob@passcalnmtedu>	<mailman.1395.1211312728.12834.python-list@python.org>
	<f2bf92c0-c3f7-4ae5-a199-ef30be68c427@u12g2000prd.googlegroups.com>
Message-ID: <48333809.2020903@cheimes.de>

Mike Driscoll schrieb:
> On May 20, 2:45 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>> Bob Greschke wrote:
>>> This MUST have been asked before, but I can't seem to Google the right
>>> thing.  How can I get a list of drives on a Windows box, like ["C:\",
>>> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>> A couple of options to get the ball rolling:
>>
>> 1) win32api.GetLogicalDriveStrings()
> 
> 
> I gave this a go to see how it worked and ti gave me this:
> 
> 'A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\
> \x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00'
> 
> Not exactly what I expected. Do I have to parse out the "\\\x00"
> myself or is there an information level switch I should add?

The data is separated by NUL bytes. Split it with \x00 and you'll get a
list of drives:
>>
"A:\\\x00C:\\\x00D:\\\x00G:\\\x00I:\\\x00L:\\\x00P:\\\x00Q:\\\x00R:\\\x00U:\\\x00X:\\\x00Y:\\\x00Z:\\\x00".split("\x00")
['A:\\', 'C:\\', 'D:\\', 'G:\\', 'I:\\', 'L:\\', 'P:\\', 'Q:\\', 'R:\\',
'U:\\', 'X:\\', 'Y:\\', 'Z:\\', '']

Christian



From straton at lampsacos.demon.co.uk  Thu May 22 05:54:19 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Thu, 22 May 2008 10:54:19 +0100
Subject: simple way to touch a file if it does not exist
In-Reply-To: <ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
Message-ID: <g13fsc$onq$1$8300dec7@news.demon.co.uk>

After os.path.exists, you need to check it _is_ a
file, and not a directory.

Giampaolo Rodola' wrote:
> On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
>> what are the simple ways?
>> I could think of os.open(), os.exec(touch file)
>>
>> are there any simpler methods?
> 
> Just use os.path.exists to check for file existence and open() as
> replacement for touch.
> 
>>>> import os
>>>> if not os.path.exists('file'):
> ...     open('file', 'w').close()
> ...
> 
> 
> --- Giampaolo
> http://code.google.com/p/pyftpdlib/


From pistacchio at gmail.com  Thu May  8 06:02:58 2008
From: pistacchio at gmail.com (pistacchio)
Date: Thu, 08 May 2008 12:02:58 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
	<efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>
Message-ID: <fvuj4k$74h$1@aioe.org>

bruno.desthuilliers at gmail.com ha scritto:
> On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
>> George Sakkis ha scritto:
> (snip)
>>> What does it matter if it's a single file or a dozen under a package ?
>>> "Installation" for pure Python packages can be as simple as copying
>>> the package under any directory in your PYTHONPATH.
>> well, it doesn't matter if it's a single file or a package, but it
>> _does_ matter if you have to put them under the path where python is
>> installed because, in a typical shared web hosting environment (such the
>> one that i use) you don't have access to system directories.
> 
> You *never* have to install anything in the default path - install
> your python libs wherever you want, and just make sure this wherever
> is in your python path (usually via the PYTHONPATH environment
> variable).
> 

again, in a shared environment, you don't have access to environment 
variables. all you can do is copy files in your own little directory, 
and that's it. this directory is never something like /share/python, but 
something like /home/averagejoe. and /home/averagejoe is not usually in 
the PYTHONPATH

>>> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
>>> and fast.
>> woudl you suggest mako over cheetah?
> 

> As far as I'm concerned, I would.  Now if you're looking for a
> somewhat barebone MVC framework, you may want to have a look at
> web.py.
> 

i've tried mako. sees to work fine for me, both for its potential and 
for its "installation" method. in fact i just copied it under my own 
directory

/home/averagejoe
   test.py
   /mako
     mako stuff

and the following testcase worked well:

from mako.template import Template
mytemplate = Template("hello world!")
print mytemplate.render()

can i do the same with web.py? mind that i work under an apache 
environment (mod_python).

now, back to mako. can you provide an example of blocks and nested 
blocks in mako? the documentation doesn't seem to be too clear in this 
reguard.

for example, if i want to show a table with a list of restaurants 
(gathered from a db query), i can construct a template like this:

<table>
% for rest in restaurants:
   <tr>${rest}<tr>
% endfor
</table>

but what if if each restaurant has a list of dishes (pasta, pizza, meat, 
pie) and some (or each) dish has the ingrediets? is it just like 
embedding pure python into the template ( like $(rest['dish'])  and 
$rest['dish']['ingredient']) )?

thanks for you interest


From sisson.j at gmail.com  Thu May  1 22:55:15 2008
From: sisson.j at gmail.com (J Sisson)
Date: Fri, 2 May 2008 02:55:15 +0000
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <CeuSj.107251$rd2.30692@pd7urf3no>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <4297a9020805011955l5c9b4a39o256be5c4455980c8@mail.gmail.com>

The first method allows python to be installed in an alternate location
(i.e. /usr/local/bin).  "env" in this case is being used to launch python
from whatever location python is installed to.

I like to think of it as an "abstraction" of the python location to make it
"multiplatform-friendly" since not all Unix systems put python in /usr/bin.

On Fri, May 2, 2008 at 1:36 AM, Yves Dorfsman <yves at zioup.com> wrote:

> On UNIX, some people use
> #!/usr/bin/env python
>
> While other use
> #!/usr/bin/python
>
> Why is one preferred over the other one ?
>
> Thanks.
>
> --
> Yves.
> http://www.SollerS.ca
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Computers are like air conditioners...
They quit working when you open Windows.
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From noah at noah.org  Mon May  5 18:22:54 2008
From: noah at noah.org (Noah)
Date: Mon, 5 May 2008 15:22:54 -0700 (PDT)
Subject: get the pid of a process with pexpect
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
Message-ID: <a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>

On May 5, 7:18 am, Karim Bernardet <bernar... at cppm.in2p3.fr> wrote:
> ssh_tunnel = pexpect.spawn (tunnel_command % globals())
> ...
> print ssh_tunnel.pid
>
> but ssh_tunnel is not the pid of the ssh tunnel
>
> Is there a way to get it using pexpect ?

You will notice that you can't get this information even from the
shell. This does not work of course:

    ssh -f -N -L 81:localhost:80 noah at www.example.com
    echo $!

However, this seems to work, but I don't trust it. Certainly it isn't
a real daemon, but this work OK for you if you only need to manage the
tunnel for the duration of your script. Notice that now Bash had the
PID in $! variable:

    ssh -N -L 81:localhost:80 noah at www.example.com &
    TUNNEL_PID=$!
    echo $TUNNEL_PID

What command-line are you using for 'tunnel_command'? This is hard
because SSH does not provide a way to get the PID of the tunnel if you
request ssh to go to the background (see the -f option). I always
considered this a bug because it makes scripting hard. Even if you
start the tunnel from a shell you can't use $! to get the PID because
the daemonizing is initiated by ssh. This is not the same use using
the shell to put a command into the background, so the shell won't
know anything about the PID.

I'm not sure if you can put ssh into the background using the shell
and still have the tunnel work. So you might start a tunnel something
like this:

    ssh -f -N -L 80:localhost:80 username at www.example.com

But can you also do something like this?

    ssh -N -L 80:localhost:80 username at www.example.com &
    echo $!

And for that to even work you will have to use Pexpect to start bash.
Remember, Python doesn't start your command in a subshell, so you have
to specify it if you want. So your tunnel command would have to be
something like this:

    tunnel_command = '''bash -c "ssh -N -L ...foo... &"'''
    ssh_tunnel = pexpect.spawn (tunnel_command % globals())

--
Noah


From szhorvat at gmail.com  Sat May  3 12:50:34 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Sat, 03 May 2008 18:50:34 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
Message-ID: <fvi54o$26lb$1@toralf.uib.no>


I did the following calculation:  Generated a list of a million random 
numbers between 0 and 1, constructed a new list by subtracting the mean 
value from each number, and then calculated the mean again.

The result should be 0, but of course it will differ from 0 slightly 
because of rounding errors.

However, I noticed that the simple Python program below gives a result 
of ~ 10^-14, while an equivalent Mathematica program (also using double 
precision) gives a result of ~ 10^-17, i.e. three orders of magnitude 
more precise.

Here's the program (pardon my style, I'm a newbie/occasional user):

from random import random

data = [random() for x in xrange(1000000)]

mean = sum(data)/len(data)
print sum(x - mean for x in data)/len(data)

A little research shows that Mathematica uses a "compensated summation" 
algorithm.  Indeed, using the algorithm described at
http://en.wikipedia.org/wiki/Kahan_summation_algorithm
gives us a result around ~ 10^-17:

def compSum(arr):
     s = 0.0
     c = 0.0
     for x in arr:
         y = x-c
         t = s+y
         c = (t-s) - y
         s = t
     return s

mean = compSum(data)/len(data)
print compSum(x - mean for x in data)/len(data)


I thought that it would be very nice if the built-in sum() function used 
this algorithm by default.  Has this been brought up before?  Would this 
have any disadvantages (apart from a slight performance impact, but 
Python is a high-level language anyway ...)?

Szabolcs Horv?t


From mensanator at aol.com  Mon May 12 15:02:41 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 12 May 2008 12:02:41 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>

On May 12, 12:27?pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
> Python" each night. Does anyone see any value in learning Python when you
> don't need to for school, work, or any other reason? I mean, sure, there's
> value in learning anything at any time, but for something like a programming
> language, I can't help but feel that I will be mostly unable to use what I
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense!

Seems silly to learn a programming language for it's own sake.
Why would you want to learn something you aren't going to use?

My attitude is I may not have an immediate use planned, but such
uses should become apparent as I learn more. For example, I collect
movie ticket sales stats from The Internet Movie Database. That meant
going to their site, finding the page that has the stats for a certain
week, copy the page, fix it up a bit and then import it into Access.

And since I only got around to updating once or twice a year, it was
a labor intensive process. But in the course of learning Python, it
became apparent that I could

- have Python scrape the web pages
- process the raw data
- do the database inserts

I never thought of those things when I started Python, but if you pay
attention to what you're "learning", these kind of things should
jump out at you.


From rschroev_nospam_ml at fastmail.fm  Mon May 19 09:30:52 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 19 May 2008 15:30:52 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <48314dd0$0$32138$426a34cc@news.free.fr>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <hifYj.43082$4B6.9014@newsfe14.ams2>

Bruno Desthuilliers schreef:
> 1/ being interpreted or compiled (for whatever definition of these 
> terms) is not a property of a language, but a property of an 
> implementation of a language.
> 
> 2/ actually, all known Python implementations compile to byte-code.
> 

You keep saying that, and in theory you're right. But I'm still inclined 
to disagree with it, since the practical reality is different. Python is 
indeed compiled to byte code, but if you compare that byte code with 
assembly code you'll see that there's a whole world of difference 
between the two, largely because of the dynamical nature of Python. Fact 
is that Python was designed from the start to run on a virtual machine, 
not on the native hardware.

C OTOH was designed to be compiled to assembly code (or directly to 
machine code) and as a result there are no (or virtually) no 
implementations that interpret C or compile it to bytecode.

I love Python, but IMHO it's a bit silly to maintain that the fact that 
Python compiles to byte code instead of assembly code/machine code is 
purely a matter of implementation; on the contrary, I believe it's a 
result of its design. I also think that there's a large difference 
between byte code and machine code (in Python's case; I haven't looked 
at other languages), and that it's a bit silly to try to trivialize that 
difference.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From duncan.booth at invalid.invalid  Thu May  1 03:36:21 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 07:36:21 GMT
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<74c070ce-1b8f-4746-9d1c-ac2227aaf515@y21g2000hsf.googlegroups.com>
Message-ID: <Xns9A9156C608E88duncanbooth@127.0.0.1>

George Sakkis <george.sakkis at gmail.com> wrote:

> On Apr 30, 5:06?am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> wrote:
>> Hall?chen!
>>
>> SL writes:
>> > "Gabriel Genellina" <gagsl-... at yahoo.com.ar> schreef in bericht
>> >news:mailman.365.1209541507.12834.python-list at python.org...
>>
>> >> En Wed, 30 Apr 2008 04:19:22 -0300, SL <n... at hao.com> escribi?: 
And
>> >> that's a very reasonable place to search; I think chr and ord are
>> >> builtin functions (and not str methods) just by an historical
>> >> accident. (Or is there any other reason? what's wrong with
>> >> "a".ord() or str.from_ordinal(65))?
>>
>> > yes when you know other OO languages you expect this. Anyone know
>> > why builtins were chosen? Just curious
>>
>> *Maybe* for aesthetical reasons. ?I find ord(c) more pleasent for
>> the eye. ?YMMV.
>>
>> The biggest ugliness though is ",".join(). ?No idea why this should
>> be better than join(list, separator=" "). ?
> 
> Seconded. While we're at it, a third optional 'encode=str' argument
> should be added, to the effect of:
> 
> def join(iterable, sep=' ', encode=str):
>     return sep.join(encode(x) for x in iterable)
> 
> I can't count the times I've been bitten by TypeErrors raised on
> ','.join(s) if s contains non-string objects; having to do
> ','.join(map(str,s)) or ','.join(str(x) for x in s) gets old fast.
> "Explicit is better than implicit" unless there is an obvious default.
> 
I'm afraid I don't agree with you on this. Most places where I use join 
I already know the type of the values being joined. In those few cases 
where I want to join non strings, or want to do some other processing on 
the values the generator comprehension is easy and has the advantage 
that I can use a more complex expression than a simple function call 
without having to wrap it in a lambda or otherwise contort things:

e.g. comma.join(x[1] for x in s)
vs.  comma.join(s, encode=operator.itemgetter(1))
or   comma.join(s, encode=lambda x: x[1])

Plus of course, you aren't going to be writing ','.join(str(x) for x in 
s) more than once in any given program before you extract it out to a 
function, are you?



From musiccomposition at gmail.com  Thu May 29 22:58:31 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Thu, 29 May 2008 19:58:31 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <dca9144b-9235-46af-ab91-17a5ccaf9aee@p25g2000hsf.googlegroups.com>

On May 27, 10:48 am, Sverker Nilsson <s... at sncs.se> wrote:
> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.
>
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it
>
> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.
>
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
>
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business

Do you have any idea how brilliant Guido is? The reason he's not here
tending to your Python war wounds is that he's busy making important
decisions on python-dev and python-3000. Maintaining a programming
language is like raising 50 very unruly children, and Guido has done
an excellent job.


From http  Wed May 21 11:43:40 2008
From: http (Paul Rubin)
Date: 21 May 2008 08:43:40 -0700
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<1%WYj.78116$%15.75349@bignews7.bellsouth.net>
Message-ID: <7xwslnzmqb.fsf@ruckus.brouhaha.com>

"inhahe" <inhahe at gmail.com> writes:
> i don't see anybody mentioning huffman encoding.  i think it just works per 
> byte, so it's not as tight as gzip or whatever.  but it sounds like it would 
> be easy to implement and wouldn't require any corpus-wide compression 
> information. except a character frequency count if you wanted to be optimal.

In principle you could do it over digraphs but I tried that once and
it didn't help much.  Basially -because- it doesn't use any
corpus-wide compression information, it doesn't compress anywhere near
as well as LZ, DMC, or whatever.


From jeffober at gmail.com  Thu May 22 08:10:42 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 22 May 2008 05:10:42 -0700 (PDT)
Subject: merging the global namespaces of two modules
References: <mailman.1469.1211449697.12834.python-list@python.org>
Message-ID: <cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>

Can you be more specific?  modA and modB don't import from each other
but both need to access objects in the global namespace of what
module?  The controlling application?  Or do you mean that, for
example, modA needs to access some functions in modB, but does not
have import statements to do so, and you want the controlling program
to do the imports for it?  If that is the case, that is bad
programming practice in Python.  Python is not C and you can't just
share header files :)

If you need to avoid recursive import conflicts, you can perform your
imports at the top of functions that use objects from another module.

Jeff
http://www.artfulcode.net


From yves at zioup.com  Fri May  9 11:11:20 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 15:11:20 GMT
Subject: slicing lists
In-Reply-To: <c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org>
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>
Message-ID: <sQZUj.125646$rd2.117530@pd7urf3no>

castironpi at gmail.com wrote:

> The only thing is, is there is another natural meaning to [a,b:c].
> 
> Counting grids on the diagonals, the rational set is well defined:
> 
> 0: 0, 0
> 1: 1, 0
> 2: 0, 1
> 3: 2, 0
> 4: 1, 1
> 5: 0, 2
> 6: 3, 0
> 7: 2, 1
> ...
> 
> Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined.  Thencefore,
> 
> a,b:c,d
> 
> is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].

I'm not sure what you mean here. Could you give me a simple piece of code to 
show an example ?


Yves.
http://www.SollerS.ca


From arituay at gmail.com  Fri May 16 16:03:51 2008
From: arituay at gmail.com (Chad Wilhite)
Date: Fri, 16 May 2008 16:03:51 -0400
Subject: IDE for Python
In-Reply-To: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
Message-ID: <3c50a9820805161303l5d3dcfd5q5c8a95a5f82cd880@mail.gmail.com>

On Fri, May 16, 2008 at 11:33 AM, Jonathan Barbero <
jonathan.barbero at gmail.com> wrote:

> Hi!
>
>  I?m newbie with Python and to learn it better I want to use a good IDE to
> concentrate on Python power. There is any IDE like Eclipse for Java for
> Python? If not, what is the best Python?s IDE for you?
>
>  Thanks,
>
>    Jonathan.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



Jonathan,
  PyDev is a Python plugin for Eclipse, here is a link to its SourceForge
site:

http://sourceforge.net/projects/pydev


Chad
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From tinnews at isbd.co.uk  Wed May 14 10:17:08 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 14 May 2008 14:17:08 GMT
Subject: Python libraries for iCalendar, which one to use?
Message-ID: <482af464$0$661$bed64819@news.gradwell.net>

I am about to try writing a little Python utility to extract some data
from an iCalendar file.  A quick Google search turns up two possible
libraries to use - vobject and "iCalendar package for Python".

First question - have I missed any other (better?) ones?

Second question - how do I choose which to use.  Do I just use the
obvious criteria like recent activity, has the methods I want etc. or
is there some place that assigns official/respectability to a library?

-- 
Chris Green


From castironpi at gmail.com  Tue May 13 09:02:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:02:13 -0700 (PDT)
Subject: I'm stuck in Python!
Message-ID: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>

Hi all.

I am trying to write to the Python newsgroup.  I doubt (aha, but
doubt) that I have come to the right place.  (Incoming "this"!)  Is
this the Python newsgroup?  I heard it was called comp.lang.python.
Now to repeat the subject line.  I'm stuck in Python.

Now that was fun.  I will also try to enumerate simple screen savers
(graphicals, graphiclizers).  It may be profitable on some non-bank-
breaking scale to compile the results.  Shall I proceed?  The risk is
"overunity", such that one person can't be at liberty to live, which
in some technical political arenas would be an "anarchy", but there
are sufficiently many of those that I will too.

Does anyone want such a list, or if not, is it at least fun and
recreational to make it?  The dollar would come along the lines of
PowerPoint (name (tm)), so it may be free to do it, very entertaining,
and peaceable.  (As the above would show, you would be free to
approach me to -buy-; I won't oversell.)  I like programming.  (And is
Guido getting his fair share?  I am prepared to share with him.)
Check in his name.

I want to try to ally with other programmers and make cool games, like
Tron, that one party can make games for on a console, such as live
obstacles, incl. tear-down, and certain people have to play from time
to time.  But you can't charge to do it, so it's a guaranteed game.
(That in virtue of that I'm typing.)  Advantages include microspacing
of time.  Very summer.

Resemblances would include Dungeons & Dragons with multi-host, or
multi-ref small-shooter sport-likers.  The real-time is definitely
attractive (duh).  As for voice, it's not clear it's the most
entertaining, but I just don't have a mic.

However, forseeing, I return with sailing, but that's in 3-space and
not even in code, as though we'd construct the Royal Navy and battle.
But I think we can keep it well.

Thing is, someone has to play it to keep a synch (keep from falling),
and tap-outs would have to live.

Side note: In political theory, this is known as the problem of
nominating a successor.  Would it stay afloat, even for long enough to
make it worth the negatives, yes which do include tear-down and fall,
invasion of privacy, and rights infrigement?

I code in Python (get the callbacks), but configurable servers could
spread the work out, using relays to put each person on each's own
turf to be a ref.  If you feed the roles, it could get really fun, and
c-l-py is the appropriate place to start such a thing, both and ask if
it's been done before.


From inhahe at gmail.com  Sun May 18 11:41:31 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 11:41:31 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
Message-ID: <K5YXj.11407$hv2.2783@bignews5.bellsouth.net>

>
> Both the responses offer lambda free alternatives. That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree. So what applications are lambdas suited to? I
> think the parameterised function model is one.
> What else?

i've hardly ever used lambdas since map() and filter() were replaced by list 
comprehension.  two other uses I can think of for it are: using it as a 
sorting key (which takes a function and lambdas are perfect for that when a 
direct function isn't available. for example, lambda x: x.myName), and I 
made an irc bot once that certain events had a list of fuctions that would 
be called after that event.  it was like being able to dynamically add and 
remove event handlers.  for example what if you asked the user a question 
and you wanted to know for the next input whether it was from that user and 
was an answer to that question.  sometimes the function to add would be very 
simple, so writing a def for it would just be ugly. 




From casey.mcginty at gmail.com  Thu May 15 16:21:44 2008
From: casey.mcginty at gmail.com (Casey)
Date: Thu, 15 May 2008 13:21:44 -0700 (PDT)
Subject: Making Variable Text Output More Pythonic?
Message-ID: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>

Hi,

I have some classes that print variable outputs depending on their
internal state, like so:

def __str__(self):
    out = []
    if self.opt1: out += ['option 1 is %s' % self.opt1']
    if self.opt2: out += ['option 2 is %s' % self.opt2']
    ....
    return '\n'.join(out)

Is there any way to make this cleaner?


From aspersieman at gmail.com  Mon May 26 05:41:26 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 26 May 2008 11:41:26 +0200
Subject: IOError in windows service
Message-ID: <483A85C6.20803@gmail.com>

Hi all

I have a script (attached) that creates a windows service. Basically the 
service periodically runs a program 'program.exe'. This all works fine, 
but during testing I discovered that if I include any 'print' statements 
(used to debug the service when its run in 'debug' mode), when _not_ in 
debug mode, it throws an error:

<error>
The instance's SvcRun() method failed
  File "C:\Python25\Lib\site-packages\win32\lib\win32serviceutil.py", 
line 785, in SvcRun
    self.SvcDoRun()
  File "C:\Program Files\Program\MyService.py", line 28, in SvcDoRun
    print "Entering while loop..."
<type 'exceptions.IOError'>: (9, 'Bad file descriptor')
</error>

I have removed the 'print' statements, after which the service runs 
fine, but was just curious to find out the reason for this error.

Regards

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 


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From skanemupp at yahoo.se  Thu May 15 13:07:39 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 10:07:39 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com> 
	<6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com>
Message-ID: <de23bd7f-75fb-4cfb-bbc0-14dc469ef6ce@k37g2000hsf.googlegroups.com>

On 15 Maj, 19:04, globalrev <skanem... at yahoo.se> wrote:
> when i try to write to the file...
>
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
> <module>
>     d.write('hej du galne kock')
> IOError: [Errno 0] Error

damn i take a break lol.

r+ ldo when open file so i CAN write to it...


From castironpi at gmail.com  Wed May 14 19:34:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:34:29 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com> 
	<d100fada-097c-49cb-8eb8-c56344245ea5@24g2000hsh.googlegroups.com>
Message-ID: <dc0b7fb4-f2df-4cd8-aaca-f64b3e267e38@l64g2000hse.googlegroups.com>

On May 14, 6:21?pm, castiro... at gmail.com wrote:
> On May 14, 12:41?pm, Raymond Hettinger <pyt... at rcn.com> wrote:
>
> > >?Should tuples be named?
>
> > Yes.
>
> Good; they're named sequences.

Can anyone make sling-shots of words?  What's the splatter?


From arnodel at googlemail.com  Fri May 30 04:03:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 30 May 2008 09:03:32 +0100
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
	<m2d4n43oxc.fsf@googlemail.com> <HjE%j.14125$ED6.6685@trnddc02>
Message-ID: <m2od6ob4mj.fsf@googlemail.com>

Alan Isaac <aisaac at american.edu> writes:

> This thread raises two questions for me.
>
> 1. I take it from this thread that in Python 3 the following are
> equivalent:
>
>        class Test: pass
>
>        class Test(object): pass
>
> Is that correct, and if so, where is it stated explicitly?
> (I know about the "all classes are new style classes" statement.)

I don't know where it is stated, but how could they *not* be
equivalent?

> 2. I take it from this thread that in Python 2.2+ if I put the
> following at the top of a module ::
>
>        __metaclass__ = type
>
> then all the classes defined in that module will be newstyle
> classes.  Is that correct?  Somehow I did not grok that from
>
> <URL:http://docs.python.org/ref/metaclasses.html>
>
> but it seems right.

>From the URL you quote:

    The appropriate metaclass is determined by the following
    precedence rules:

    * If dict['__metaclass__'] exists, it is used.

    * Otherwise, if there is at least one base class, its metaclass is
      used (this looks for a __class__ attribute first and if not
      found, uses its type).

    * Otherwise, if a global variable named __metaclass__ exists, it
      is used.

    * Otherwise, the old-style, classic metaclass (types.ClassType) is
      used.

Look at the third point.

-- 
Arnaud


From vivainio at gmail.com  Sun May 25 07:31:50 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 25 May 2008 11:31:50 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
	<Xns9AA96A134C3B6duncanbooth@127.0.0.1>
Message-ID: <87prra39hz.fsf@gmail.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:


> Or if you code in C++ and they *really* need to get at something you
> made private they will still get at it. I've been there and done
> that: 'private' in languages which have it is rarely an advantage
> and frequently a pain.

Indeed. In C++, they recommend the "pimpl idiom" (private
implementation), which actually has real advantages ;-)



From hat at se-162.se.wtb.tue.nl  Thu May 22 09:51:35 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 22 May 2008 15:51:35 +0200
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
Message-ID: <slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>

On 2008-05-22, s0suk3 at gmail.com <s0suk3 at gmail.com> wrote:
> Hi, I wanted to know how cautious it is to do something like:
>
> f = file("filename", "rb")
> f.read()
>
> for a possibly huge file. When calling f.read(), and not doing
> anything with the return value, what is Python doing internally? Is it
> loading the content of the file into memory (regardless of whether it
> is discarding it immediately)?

I am not a Python interpreter developer, but as user, yes I'd expect that to
happen. The method doesn't know you are not doing anything with its return
value.

> In my case, what I'm doing is sending the return value through a
> socket:
>
> sock.send(f.read())
>
> Is that gonna make a difference (memory-wise)? I guess I'm just
> concerned with whether I can do a file.read() for any file in the
> system in an efficient and memory-kind way, and with low overhead in
> general. (For one thing, I'm not loading the contents into a
> variable.)

Doesn't matter. You allocate a string in which the contents is loaded (the
return value of 'f.read()', and you hand over (a reference to) that string to
the 'send()' method.

Note that memory is allocated by data *values*, not by *variables* in Python
(they are merely references to values).

> Not that I'm saying that loading a huge file into memory will horribly
> crash the system, but it's good to try to program in the safest way
> possibly. For example, if you try something like this in the

Depends on your system, and your biggest file.

At a 32 bit platform, anything bigger than about 4GB (usually already at around
3GB) will crash the program for the simple reason that you are running out of
address space to store bytes in.


To fix, read and write blocks by specifying a block-size in the 'read()' call.

Sincerely,
Albert


From grante at visi.com  Sat May 10 18:57:20 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 10 May 2008 17:57:20 -0500
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <5dednf9GS5nNtbvVnZ2dnUVZ_qLinZ2d@posted.visi>

On 2008-05-10, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

>> These are the minute details that bedevil the poor noob.  I've
>> read dozens of tutorials on different prog langs and have
>> never read a single thing on white space or blank lines
>> preceding a shebang.  Till now.  I always get
>
> 	Well... The "shebang" line is OS and shell specific

The "#!" is sort of a holdover from the "magic number" used
back in the day on Unix systems. Traditionally, the type of an
executable file on Unix systems was determined by a "magic
number" that was read from the first two bytes of a file:

  http://en.wikipedia.org/wiki/Magic_number_(programming)

Back then there was a text file somewhere that listed the
various 16-bit values and what they meant.  The "file" program
used that list to guess what a file was. It's gotten
considerably more complex since then, and the "magic" file has
syntax to specify fairly large/complex patterns that are used
to determine file types.  If you're curious, there's probably a
"magic" file somewhere on your system.  On Gentoo it's at
/usr/share/misc/file/magic, 
  
On a Linux system (and I presume on other Unixes), the kernel
itself (if built with the proper options) knows know how start
a "script" file that starts with the characters "#!".  When the
kernel is told to execute a file whose first two bytes are "#!"
(0x32,0x21), it knows to read the newline terminated path of an
executable starting at the byte following the "!" (the third
byte in the file).  The kernel then executes that file,
appending the name of the original "script" file to the argv
list.

-- 
Grant Edwards                   grante             Yow! My mind is making
                                  at               ashtrays in Dayton ...
                               visi.com            


From ocollioud at gmail.com  Fri May 16 04:23:59 2008
From: ocollioud at gmail.com (olive)
Date: Fri, 16 May 2008 01:23:59 -0700 (PDT)
Subject: how to set python hosting !
References: <ef823a8f-9cb7-4e39-b9ad-e08754eb5ec5@n1g2000prb.googlegroups.com>
Message-ID: <aece52b1-679e-4f5b-9066-b1450c3f6100@k37g2000hsf.googlegroups.com>

On May 16, 9:16 am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i do have some basic python know-how. i want to tryout by actually
> implementing some python generated dynamic page etc.
>
> i am having websetup which runs with mysql on linux, and pythong is
> installed on it.
>
> so is there any ref. from where i can know how to configure my
> webserver for python.
>
> -Raxit
Hi,
see http://www.wsgi.org/wsgi
hth


From nick at craig-wood.com  Thu May 22 11:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 10:30:07 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>

Dave Parker <daveparker at flamingthunder.com> wrote:
>  But after getting input from children and teachers, etc, it started
>  feeling right.
> 
>  For example, consider the two statements:
> 
>       x = 8
>       x = 10
> 
>  The reaction from most math teachers (and kids) was "one of those is
>  wrong because x can't equal 2 different things at the same time".

This is a common feature in functional languages...

Eg

Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
[async-threads:0] [kernel-poll:false]

Eshell V5.6.2  (abort with ^G)
1> X = 8.
8
2> X = 10.
** exception error: no match of right hand side value 10
3>

That error message is the erlang interpreter saying "Hey I know X is
8, and you've said it is 10 - that can't be right", which is pretty
much what math teachers say too...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From matthieu.brucher at gmail.com  Sat May 17 17:35:53 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sat, 17 May 2008 23:35:53 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <g0nhaf$ee7$1@ger.gmane.org>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<g0nhaf$ee7$1@ger.gmane.org>
Message-ID: <e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>

2008/5/17 Christian Heimes <lists at cheimes.de>:

> Matthieu Brucher schrieb:
> > Hi,
> >
> > I did not manage to build extension with distutils with Python compiled
> with
> > VS different than 2003. The need for 2003 was hard-coded in distutils.
> > You can try building extensions with VS2008 with Scons. This is what I do
> a
> > lot, and everything works fine as long as the interface does not use
> > standard structures (like FILE, custom structures are fine) or objects
> > allocated in the extension is freed in the extension.
>
> Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
> officially supported.


Even if you compile Python 2.5 with VS2008, VS2003 is used for the
extensions, AFAIR. I didn't try Python 2.6 because I only have Visual C++
Express 2008.

You can compile extensions with a different version of MS VC but it can
> get you in a lot of trouble. Every version of the VS Compiler uses its
> own C Runtime Library (MSVCRT). You can't share some resources like
> allocated memory and FILE* objects between MSVCRTs.


I don't see your point, that's what I wrote...

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From bob at passcal.nmt.edu  Tue May 20 15:18:08 2008
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Tue, 20 May 2008 13:18:08 -0600
Subject: List of disk drives on Windows?
Message-ID: <2008052013180816807-bob@passcalnmtedu>

This MUST have been asked before, but I can't seem to Google the right 
thing. ?How can I get a list of drives on a Windows box, like ["C:\", 
"D:\"], like I can if I do something like listdir("/Volumes") on a Mac?

Thanks!

Bob



From badmuthahubbard at gmail.com  Thu May  8 17:17:18 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Fri, 9 May 2008 00:17:18 +0300
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
In-Reply-To: <88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
	<88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>
Message-ID: <8200bab70805081417t4cfdcb0dqe8561b5fd83dccf5@mail.gmail.com>

:'(
I'm confused

On Fri, May 9, 2008 at 12:03 AM, offby1 <eric.hanchrow at gmail.com> wrote:
> Ah.  So from the point of view of mut.py, "thing" and "system.thing"
> are separate, unrelated variables; the former of which is initialized
> from the latter when mut says "from system import thing".   Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From arnodel at googlemail.com  Sun May 18 09:40:52 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 18 May 2008 14:40:52 +0100
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
Message-ID: <m2ve1b7msb.fsf@googlemail.com>

Lie <Lie.1296 at gmail.com> writes:

> Lambda can actually be safely removed from python and no other
> features would be missing. It is always possible to create a def
> version of any lambda, so lambda is useless. It is just a convenience
> for the times where we're just too lazy to invent a name and find a
> place to place the def, instead just inlining the function.

Note that the same thing can be said about generator expressions,
which are nothing more than anonymous, non-reusable, generator
functions.  Instead these were _added_ to the language!

-- 
Arnaud


From johnjsal at NOSPAMgmail.com  Mon May 12 23:40:11 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 03:40:11 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<_w%Vj.9941$Qw5.889@fe107.usenetserver.com>
Message-ID: <48290d9a$0$11626$607ed4bc@cv.net>

notbob wrote:

> On 2008-05-12, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>
>> language, I can't help but feel that I will be mostly unable to use what I 
>> learn simply because I have no reason to use it.
>
>> The *process* of learning is enough fun for me, and every now and then I do 
>> find a small use for Python that really pays off,
>
> You're contradicting yourself.  Which is it?  You can or can't use it?  
>
> I suspect the more you learn of it, the more you will be able to do with it.  I
> hope so, as I'm just doing it now, like you, for the sake of learning.  

I just meant that over the couple of years that I've been studying it,
I've had a real occasion to use it maybe three or four times. For the
most part, I don't use it regularly enough (which is why I'm in the
process of re-learning some of it, because it's been so long since I
used it).


From zephyrfalcon!NO_SPAM! at gmail.com  Thu May 29 22:14:25 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Thu, 29 May 2008 22:14:25 -0400
Subject: Code execution in imported modules
In-Reply-To: <mailman.1757.1212108231.12834.python-list@python.org>
References: <mailman.1757.1212108231.12834.python-list@python.org>
Message-ID: <0oJ%j.15824$Kk3.14125@bignews9.bellsouth.net>

Eric Wertman wrote:
> So I'm working on some file parsing and building up a stack of regular
> expressions that I need to use.  I was thinking of dropping them in an
> external module.  I was wondering.. if I put them in a file called
> regex.py like so :
> 
> import re
> 
> re1 = "..
> re2 = "..
> 
> and then do:
> 
> rgx1 = re.compile(re1)
> rgx2 = re.compile(re2)
> 
> 
> and, in my script, parse.py py I do:
> 
> from regex import *
> 
> text = "bunch of stuff......."
> 
> m = rgx1.search(text)
> 
> 
> Does the re get compiled when I import it, or every time I call it?
> Since I'm calling it often, I'd like to compile it once.

It is compiled when you import the module.

-- 
Hans Nowak (zephyrfalcon at gmail dot com)
http://4.flowsnake.org/


From kyosohma at gmail.com  Mon May 19 10:10:57 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 07:10:57 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: 20080518182022.990193bd.johnjsal@NOSPAMgmail.com
Message-ID: <3e7fa0d6-c8a4-4149-8fb7-b15f5e20414d@k37g2000hsf.googlegroups.com>

On May 18, 5:20?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Most of my non-GUI stuff is login scripts and registry editing. I also
have some scripts that can install various programs silently, such as
Adobe Reader or Firefox. This is for work purposes as we have a
specific set of applications that need to be installed on each
machine.

Mike


From castironpi at gmail.com  Tue May 13 07:31:04 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:31:04 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
Message-ID: <537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>

On May 13, 5:47?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:06:09 -0300, gsal <salger... at gmail.com> escribi?:
>
> > There does not seem to be a valid url for the Installer, anywhere.
> > Could anyone provide me with a copy of it?
>
> I think py2exe is its successor:http://www.py2exe.org/
>
> --
> Gabriel Genellina

I actually thought 'copy' was a banned word.  I don't have one, but I
can.  I.e., cutting and pasting code is working fine currently.  I
just got two editors!


From geoffrey.clementsNO at SPAMbaesystems.com  Thu May 15 08:10:25 2008
From: geoffrey.clementsNO at SPAMbaesystems.com (Geoffrey Clements)
Date: Thu, 15 May 2008 13:10:25 +0100
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
Message-ID: <482c2424$1_1@glkas0286.greenlnk.net>

"urikaluzhny" <ukaluzhny at nds.com> wrote in message 
news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> | It seems that I rather frequently need a list or iterator of the form
> | [x for x in <> while <>]
>
> I can think of two ways to interpret that.
>> I mean like [x for x in <A> if <B>], only that it breaks the loop when
>> the expression <B> is false.

def gen(a):
    for x in a:
        if B: break
        yield x

a_gen = gen(A)

# now iterate over a_gen

-- 
Geoff 




From ZeeGeek at gmail.com  Tue May 20 12:31:27 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Tue, 20 May 2008 09:31:27 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
Message-ID: <0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>

On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
>
> > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
>
> > > > Hi, what's the default localedir for gettext module on windows? In
> > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > order to make the translation work?
>
> > > %PYTHONHOME%\share\locale
>
> > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > use:
>
> > import gettext
> > gettext.install('testprogram', unicode = True)
>
> The syntax is correct. Is the test program localised under Linux or
> Cygwin? If not then the error is somewhere in your application.

Yes, it's localized under linux.

> How did you try to set the language on Windows? It works for me on Vista
> with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> correctly).

I'm using Simplified Chinese Windows, so I didn't set anything
specifically before firing up the program. I found that if I use
gettext.GNUTranslations to read in the .mo file, then it's localized.
But gettext.install doesn't work.


From fc14301589 at icqmail.com  Sat May 31 14:52:35 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sun, 01 Jun 2008 02:52:35 +0800
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
	<2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
Message-ID: <48419e73_2@news.tm.net.my>

On 22:01, sabato 31 maggio 2008 globalrev wrote:

> also, lets say i want to send a SMS to my own phone from the internet.
> how would i do that?

IMO, nowadays free SMS sending, via internet, is gone. There should be the
chance from one's own subscribed network.
-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From inhahe at gmail.com  Fri May 16 14:08:40 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 14:08:40 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net><mailman.1232.1210952591.12834.python-list@python.org><kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
	<mailman.1236.1210959884.12834.python-list@python.org>
Message-ID: <a4kXj.142757$Er2.127823@bignews6.bellsouth.net>


"Dan Upton" <upton at virginia.edu> wrote in message 
news:mailman.1236.1210959884.12834.python-list at python.org...


>
> On Fri, May 16, 2008 at 1:27 PM, Mensanator <mensanator at aol.com> wrote:
>>
>> Why wouldn't the compilers support it? It's part of the x86
>> architexture,
>> isn't it?
>
> Yeah, but I don't know if it uses it by default, and my guess is it
> depends on how the compiler back end goes about optimizing the code
> for whether it will see data access/computation patterns amenable to
> SIMD.

perhaps you explicitly use them with some extended syntax or something?




From castironpi at gmail.com  Thu May  8 20:21:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:21:24 -0700 (PDT)
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com> 
	<JGIUj.52528$Bb3.41853@trnddc01> <k5i4cyb3.fsf@gmail.com>
	<WGKUj.8780$0L.8138@trnddc07>
Message-ID: <f6863ebf-308f-4c15-bc8a-84a4183ab884@r66g2000hsg.googlegroups.com>

On May 8, 4:57?pm, Alan Isaac <ais... at american.edu> wrote:
> Ville M. Vainio wrote:
> > in case of stocks, you are probably monitoring several
> > stock objects, so the stock should probably pass itself to
> > the observer
>
> OK. ?This is related to my question #2 (in a separate
>
> thread), where I'd also appreciate your comments.
>
> > analogous to a typical UI scenario where you have several
> > widgets forwarding events to one big observer - and they
> > *do* provide the event source and event type.
>
> That is a helpful comparison.
>
> > All in all, though, the right solution should be obvious
> > from the problem at hand.
>
> For CS types, maybe. ?The rest of us are just trying to get
>
> things done without as much background and context.
>
> Thanks,
>
> Alan

My local vernacular calls them "carfulls" of people, which analogy to
the body of collective man, extends pretty far.

It's not the gas pedal we hate!  I'm schedule more coasting on shore.


From wizzardx at gmail.com  Sun May  4 03:32:57 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 09:32:57 +0200
Subject: Script Optimization
In-Reply-To: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
Message-ID: <18c1e6480805040032u6450bf34wc5ca9ea6c81da56@mail.gmail.com>

>  It's too long to post here (160 lines) so here's the link:
>  http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
>  (if that doesn't work: http://uppit.com/CKOYHE)
>
>  Thanks in advance,
>  lev

Neither link works for me. I get an error page "Error: invalid
download linnk". How about you send it to the list as an attachment?

David.


From gherron at islandtraining.com  Tue May 13 18:25:16 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 15:25:16 -0700
Subject: What is  self.file = file  for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <482A154C.1030204@islandtraining.com>

wxPythoner at gmail.com wrote:
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
>     """Print and number lines in a text file."""
>     def __init__(self, file):
>         self.file = file
>         .
>         .
>         .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

If you know about Object-Oriented Programming this should make sense.  
If you don't, then you have some reading/learning to do first.

When someone wants to create an object of type TextReader, they must 
supply a value
   ob = TextReader(v)
That calls the __init__ constructor with the supplied value of v in the 
variable named file.
If the object being created wants to record the value for future use, 
then the line
  self.file = file
does just that.   "self" is the name of the object being created, 
"self.file" is an attribute named "file" of that object, and the 
assignment stores the supplied value there.

Gary Herron




From workitharder at gmail.com  Fri May 23 12:36:44 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 09:36:44 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
Message-ID: <46602e24-0285-4667-b09a-8f7ce7509f71@b5g2000pri.googlegroups.com>

On May 23, 3:29?am, "inhahe" <inh... at gmail.com> wrote:
> "inhahe" <inh... at gmail.com> wrote in message
>
> news:MKwZj.2749$772.668 at bignews2.bellsouth.net...
>
> > if we assume the constraints are that:
> > 1.he has list, l
> > 2.he has a dictionary, d
> > 3.he wants the function to print the values in the dictionary according to
> > a specific order of their keys as defined by the function, followed by the
> > values of the list
>
> It's also possible (even likely) that he knows outside of the function what
> order he wants the values in, and only used an (incidentally) unordered dict
> called kwargs because he thought that's the only way to pass to those
> parameters. ?in which case the function could be left untouched and the he
> would call it like this:
>
> args = [1,2,3]
> f(*args)
> or
> f(*[1,2,3])

You're actually pretty dead-on here. I preferred the keyword approach
because printing it showed an explicit assignment of arguments, but it
looks like I'll have to use a list if there's an *argv argument, since
there's no way to assign it with keywords, and no (working) way to use
them together.

def f(a, *args): print a, args
args = [2, 3]
kwargs = {'a':1}

f(*args, **kwargs)
TypeError: f() got multiple values for keyword argument 'a'

kwargs['args'] = args
f(**kwargs)
TypeError: f() got an unexpected keyword argument 'args'


From grante at visi.com  Mon May 12 10:44:58 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 09:44:58 -0500
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au>
Message-ID: <lI6dnUZf8M53yrXVnZ2dnUVZ_gKdnZ2d@posted.visi>

On 2008-05-12, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

I too, agree that requiring a name be bound to the values
coming out of the iterator seems "wrong".

> With "do something N times", there must be *something* to keep track
> of which iteration we're up to (or, equivalently, how many iterations
> remain) at a given moment. A Python iterator seems a fine choice to
> hold that information, and better than many alternatives.

An iterator like xrange() is an excellent choice. But, since
the iterator contains that information, why require that that
value be "exported" by the iterator and bound to an externally
visible name?  In the case in question, the only thing you need
from the iterator is the StopIteration exception.  To me,
exposing the internal state of the iterator and requiring that
the user bind a name to it each time through the loop feels
we're like driving a nail with a screwdriver.

-- 
Grant Edwards                   grante             Yow! Was my SOY LOAF left
                                  at               out in th'RAIN?  It tastes
                               visi.com            REAL GOOD!!


From bj_666 at gmx.net  Tue May 20 14:13:08 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 18:13:08 GMT
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
	<g0v2vs$38b$01$1@news.t-online.com> <483311EB.1040307@gmail.com>
Message-ID: <69gilkF30tko7U1@mid.uni-berlin.de>

On Tue, 20 May 2008 23:31:15 +0530, Nikhil wrote:

> Peter Otten wrote:
>> Nikhil wrote:
>> 
>>> I have recently written a small module. When I import the module, I
>>> always get the error
>>>
>>>
>>> only when I do
>>>
>>>  >>> from local.my.module import *
>>>
>>> --
>>> Traceback (most recent call last):
>>>    File "<stdin>", line 1, in <module>
>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>> ---
>>>
>>>
>>> but when I do the below, I do not get any error.
>>>
>>> --
>>>  >> import local.my.module
>>>  >>
>>> --
>>>
>>> Any ideas on what could be wrong?
>> 
>> Are you abusing the __all__ attribute?
>> 
>> $ cat tmp.py
>> __all__ = ['/xyz/py/file']
>> 
>> $ python -c "from tmp import *"
>> Traceback (most recent call last):
>>   File "<string>", line 1, in <module>
>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>> 
>
> Yes, I am. Is there any reason not to?

That your module raises the `AttributeError` and is broke is not reason
enough!?  :-)

> basically, since this is implemented in the module, I have to export it 
> since the caller to the function in the module is responsible for 
> ensuring he has enough proper permissions to read the file.

What do you mean by "implemented in the module"?  `__all__` is for names
that live in the module's namespace -- '/xyz/py/file' isn't even a legal
identifier name in Python!

Ciao,
	Marc 'BlackJack' Rintsch.


From exarkun at divmod.com  Tue May  6 12:35:26 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 6 May 2008 12:35:26 -0400
Subject: select.poll() and WSAPoll
In-Reply-To: <ef9a170d-5b87-4ec0-9d7d-67b8d1057083@t54g2000hsg.googlegroups.com>
Message-ID: <20080506163526.6859.2102154164.divmod.quotient.59595@ohm>

On Tue, 6 May 2008 08:44:36 -0700 (PDT), Giles Brown <giles_brown at hotmail.com> wrote:
>On 6 May, 14:18, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Tue, 6 May 2008 08:36:28 -0400, inhahe <inh... at gmail.com> wrote:
>> >select.poll isn't supported on Windows, because Windows doesn't have such a
>> >feature, or at least it didn't until Vista.  Vista implements the same thing
>> >but called  WSAPoll, an article is here
>> >http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
>> >I hope that the next edition of Python supports select.poll on Vista, or at
>> >least that someone writes a third-party module fo it. As much as I'd love to
>> >do it myself, it's probably beyond me.. i've never used poll before nor
>> >written a Python extension.  also, i don't have Vista.
>> >Thanks
>>
>> If you use Twisted, then you can use I/O Completion Ports, which are even
>> better than WSAPoll, and your code will also work with KQueue on BSD or
>> EPoll on Linux without any changes. :)
>>
>> Jean-Paul
>
>The current docs describe the I/O Completion Ports reactor as
>"extremely experimental".
>
>http://twistedmatrix.com/projects/core/documentation/howto/choosing-reactor.html#auto8
>
>Is that overly conservative or is it as bleeding edge as it sounds?
>
>(IIRC there have been caveats like this on the Windows reactors for
>a while)

With the most recent release, the IOCP reactor is in much better shape than
it ever has been before.  It's not perfect, but it fails fewer than 10 unit
tests from the Twisted suite (of almost 4300).  The goal, of course, is for
it to fail none of them. ;)  It's possible we'll get there for a release in
the not too distant future.

The current results of the test suite are available at this extremely pretty
URL:

http://buildbot.twistedmatrix.com/waterfall?builder=win32-py2.4-iocp&builder=winxp32-py2.5-iocp&builder=vista-py2.5-iocp&builder=server-2k8-x86-py2.5-iocp&branch=trunk

So I'd call it "almost working" rather than "extremely experimental" at this
point.  Thanks for bringing this up, we should probably adjust our docs. :)

Jean-Paul


From b0bm00r3 at gmail.com  Sun May 11 02:45:00 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Sat, 10 May 2008 23:45:00 -0700 (PDT)
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
	<7xbq3dfj0c.fsf@ruckus.brouhaha.com>
Message-ID: <5cc8c484-a252-4cc2-b432-3ba13a064385@m44g2000hsc.googlegroups.com>

On May 11, 2:32 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> philly_bob <b0bm0... at gmail.com> writes:
> > algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
> > accs=[]
> > for alg in algs:
> >    thisacc=getattr(alg.accuracy)()   # picked this technique on
> > comp.lang.python last month
> >    accs.append(thisacc)
>
> I think what you mean is (untested):
>
>      algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
>      accs = sorted(((alg.accuracy(), alg.name()) for alg in algs),
>                    reverse=True)
>      for i,(alg_acc, alg_name) in enumerate(accs):
>         print '%2d %5s %0.2f'% (i, alg_name, alg_acc)
>
> This assumes a method alg.name() which tells you the name of the
> algorithm.  I don't understand how you're converting the string 'AlgA'
> to an algorithm object in your example above.

The technique is described in this thread:

http://groups.google.com/group/comp.lang.python/browse_frm/thread/ed652ba2fab47a6f/489f1746210e83b9?lnk=st&q=b0bm00r3#489f1746210e83b9

I've barely mastered it, but it does work.

Bob=


From bruno.desthuilliers at gmail.com  Wed May  7 18:27:58 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:27:58 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com>
Message-ID: <35e4c5fb-d09f-492d-a165-f03be93ff465@8g2000hse.googlegroups.com>

On 7 mai, 23:51, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
(snip)

Small improvement thanks to Paul Rubin:

from collections import defaultdict
from operator import itemgetter

def get_letters_frequency(source):
    letters_count = defaultdict(int)
    for letter in source:
        letters_count[letter] += 1
      return sorted(
          letters_count.iteritems(),
          key=itemgetter(1),
          reverse=True
       )



From pupeno at pupeno.com  Fri May 16 17:53:03 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Fri, 16 May 2008 14:53:03 -0700 (PDT)
Subject: Getting elements and text with lxml
Message-ID: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>

Hello,

I have an XML file that starts with:

<vortaro>
<art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
<kap>
  <ofc>*</ofc>-<rad>a</rad>
</kap>

out of it, I'd like to extract something like (I'm just showing one
structure, any structure as long as all data is there is fine):

[("ofc", "*"), "-", ("rad", "a")]

How can I do it? I managed to get the content of boths tags and the
text up to the first tag ("\n   "), but not the - (and in other XML
files, there's more text outside the elements).

Thanks.


From castironpi at gmail.com  Fri May 16 18:19:03 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:19:03 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
	<43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com> 
	<AknXj.46809$3v1.1644@bignews3.bellsouth.net>
Message-ID: <85961d8b-5055-47a4-b5c1-55bee7460dd8@24g2000hsh.googlegroups.com>

On May 16, 4:51?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> bruno.desthuilli... at gmail.com wrote:
> > On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
> > <bruno.desthuilli... at gmail.com> wrote:
> >> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>
> >>> Dan Upton wrote:
> >>>> for pid in procs_dict:
> > (snip)
> >>> ? ?for pid in procs_dict.keys():
> >> I'm afraid this will do the same exact thing. A for loop on a dict
> >> iterates over the dict keys, so both statements are strictly
> >> equivalent from a practical POV.
>
> > Hem. Forget it. I should think twice before posting - this will
> > obviously make a big difference here. ?Sorry for the noise.
>
> :-) ?It appears that you would be right if this was Python 3.0, though:
>
> Python 3.0a5 (r30a5:62856, May 16 2008, 11:43:33)
> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> ?>>> d = {1: 2, 3: 4, 5: 6}
> ?>>> for i in d.keys(): del d[i]
> ...
> Traceback (most recent call last):
> ? ?File "<stdin>", line 1, in <module>
> RuntimeError: dictionary changed size during iteration
>
> Maybe 'for i in d' and 'for i in d.keys()' *are* functionally equivalent in 3.0,
> as d.keys() returns an object that iterates over d's keys... but I haven't read
> enough about it yet to be sure. ?In any case, the problem goes away when we
> force a list:
>
> ?>>> d = {1: 2, 3: 4, 5: 6}
> ?>>> for i in list(d.keys()): del d[i]
> ...
> ?>>> d
> {}
>
> --Hans- Hide quoted text -
>
> - Show quoted text -

You may be searching for:

for i in d.keys()[:]:
   del d[ i ]



From tgrav at mac.com  Thu May 29 11:02:25 2008
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 29 May 2008 11:02:25 -0400
Subject: mysqldb install problem
Message-ID: <58C1F8D5-DB1C-4598-B124-92FBC2B07041@mac.com>

I am trying to install mysqldb-1.2.2 on my PPC running 10.5.2 and  
Activepython 2.5.1.1
when I get this error:

running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.3-fat-2.5/MySQLdb
running build_ext
building '_mysql' extension
gcc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing - 
Wno-long-double -no-cpp-precomp -mno-fused-madd -fPIC -fno-common - 
dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes - 
Dversion_info=(1,2,2,'final',0) -D__version__=1.2.2 -I/usr/local/mysql/ 
include -I/Library/Frameworks/Python.framework/Versions/2.5/include/ 
python2.5 -c _mysql.c -o build/temp.macosx-10.3-fat-2.5/_mysql.o -g - 
Os -arch ppc64 -fno-common -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE  
-DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT - 
DDONT_DECLARE_CXA_PURE_VIRTUAL
In file included from /Library/Frameworks/Python.framework/Versions/ 
2.5/include/python2.5/Python.h:57,
                  from pymemcompat.h:10,
                  from _mysql.c:29:
/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/ 
pyport.h:734:2: error: #error "LONG_BIT definition appears wrong for  
platform (bad gcc/glibc config?)."
In file included from _mysql.c:35:
/usr/local/mysql/include/my_config.h:1095:1: warning: "SIZEOF_LONG"  
redefined
In file included from /Library/Frameworks/Python.framework/Versions/ 
2.5/include/python2.5/Python.h:8,
                  from pymemcompat.h:10,
                  from _mysql.c:29:
/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/ 
pyconfig.h:807:1: warning: this is the location of the previous  
definition
error: command 'gcc' failed with exit status 1

Anyone know what is going on?

Cheers
   Tommy


From duncan.booth at invalid.invalid  Mon May  5 04:37:07 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 May 2008 08:37:07 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
Message-ID: <Xns9A956087CF47Aduncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Sun, 04 May 2008 12:58:25 -0300, Duncan Booth
> <duncan.booth at invalid.invalid> escribi?: 
> 
>> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>>
>>> I thought that it would be very nice if the built-in sum() function
>>> used this algorithm by default.  Has this been brought up before? 
>>> Would this have any disadvantages (apart from a slight performance
>>> impact, but Python is a high-level language anyway ...)?
>>
>> There's a thread you might find interesting:
>>
>> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9
>> eda29faf92f532e/027cef7d4429aa3a 
>>
>> In that thread I suggested that Python ought to implement sum by
>> adding together each pair of values, then each pair of results and so
>> on. This means that for input values of a similar magnitude the
>> intermediate results stay balanced. The implementation doesn't
>> actually do all the first level 
> 
> Python doesn't require __add__ to be associative, so this should not
> be used as a general sum replacement. But if you know that you're
> adding floating point numbers you can use whatever algorithm best fits
> you. Or use numpy arrays; I think they implement Kahan summation or a
> similar algorithm. 
> 
Yes, my argument is more along the line that it should have been 
implemented that way in the first place, but changing things now would 
require time machine intervention. :)




From bignose+hates-spam at benfinney.id.au  Fri May  2 10:44:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:44:00 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
Message-ID: <877ieczryn.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 23:30:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > The OP was asking why people prefer on over the other. My answer
> > is that I prefer specifying "give me the default OS Python"
> > because anything not installed by the OS is [too] non-standardised
> > for me to worry about.
> 
> As someone else pointed out, not all the world is Linux.

It's a good thing I've never implied such to be the case.

-- 
 \         "If nature has made any one thing less susceptible than all |
  `\    others of exclusive property, it is the action of the thinking |
_o__)                       power called an idea"  -- Thomas Jefferson |
Ben Finney


From artyprog at gmail.com  Wed May 21 03:56:17 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Wed, 21 May 2008 09:56:17 +0200
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
Message-ID: <4833d5a2$0$839$ba4acef3@news.orange.fr>

Thanks all of you

Regards

Salvatore 




From hat at se-162.se.wtb.tue.nl  Thu May 29 03:22:29 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 29 May 2008 09:22:29 +0200
Subject: How to get all the variables in a python shell
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <slrng3smdl.o6t.hat@se-162.se.wtb.tue.nl>

On 2008-05-29, lixinyi.23 at gmail.com <lixinyi.23 at gmail.com> wrote:
> Hi!
>
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.

ok, although I personally favor the style of writing and running a
script/program, since it scales much better (you can easier automate steps),
and it is much easier reproducible (something you probably want in scientific
software) and storable (in a VCS).

> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.

I do hope you have made a fair estimate of the amount of work that it costs to
change the value of a variable in this way.

I would propose to simply use the interactive Python prompt. It doesn't give
you popup icons for clicking, but you do get the entire Python interpreter, and
all its libraries for free.

The Python library has a frame work for customizing the interpreter. Have a
look at 'cmd' module.

> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

Now you have lost me. One window is not enough for interaction?

Obviously, you'll need to have a common interpreter/storage backend. One
solution may be to have a common execution back-end, and for each window a
'frontend' which passes commands entered to the back-end, and echoes results
from the back-end to the terminal.

> Maybe I could just build a small database to store all the values and
> access them from both programs, but chances are sometimes I have to
> deal with big arrays, and they will eat extra memory if I keep them in

They eat memory when you keep them in a data base? It seems, you are making
assumptions about implementations here without telling them.
(ie pick a data base that uses a disk, and your problem is solved. Why is that
not an option?)

Sincerely,
Albert



From ulrich at dorda.net  Sun May 25 06:32:30 2008
From: ulrich at dorda.net (ulrich at dorda.net)
Date: Sun, 25 May 2008 03:32:30 -0700 (PDT)
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org> 
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
Message-ID: <d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>

Thanks for the reply,

Of course the suggested solution is working and good, but a bit
complicated. The module/function where i need to access the variable
value from the interactive shell is burried quite deep and I would
nedd to hand the locals() quite often from one module to another.
Furthermore it makes the call function slightly more complicated, as
the locals()-argunment has to be given every time.

I was hoping for something a bit different: If I wanted to access a
value b from another module "utest2.py", I would simply need to type
in utest.py: import utest2; print 2*utest2.b
Isn't there a name for the interactive namespace (like here the
utest2), which I can use to access the variable without handing the
whole dictionary?

Cheers,

Ulrich





From dannywebster at googlemail.com  Tue May 13 06:46:45 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 03:46:45 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>

On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
> >>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
> >>> f=str(f)
> >>> f.split()
>
> ["['host1","host2", ... ,"hostN\n']"]
>
> Any help is highly appreciated
>
> ta
>
> dan.

I did indeed mean "os.popen", no "os.open"



From none at this.time  Mon May 26 17:06:53 2008
From: none at this.time (Paul Miller)
Date: Mon, 26 May 2008 17:06:53 -0400
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
	<45f03028-a86c-4357-9aa2-0148f7cc84dc@d45g2000hsc.googlegroups.com>
	<mailman.1626.1211831386.12834.python-list@python.org>
Message-ID: <80531$483b266d$3799@news.teranews.com>

On Mon, 26 May 2008 15:49:33 -0400, Dan Upton wrote:

> On Mon, May 26, 2008 at 3:22 PM,  <miller.paul.w at gmail.com> wrote:

> I don't know if it would necessarily look like the CPython VM, except
> for the decode stage (this being said without any knowledge of the
> CPython implementation, but with more than I ever thought I'd know about
> processor architecture/microarchitecture)

Out of curiosity, do you know how easy it would be to make a Python chip 
using FPGAs?  I have little to no hardware knowledge, but it sounds like 
a fun project in any case.  Even if it's not likely to have blazing 
performance, it'd be cool to load Python bytecode directly into 
memory. :-)

-- 
code.py: a blog about Python.  http://pythonista.wordpress.com
** Posted from http://www.teranews.com **


From nick at craig-wood.com  Tue May 20 04:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 03:30:05 -0500
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
	<mailman.1343.1211203732.12834.python-list@python.org>
	<75dc8fc3-aef0-44ee-a6df-059f8cd2e226@d45g2000hsc.googlegroups.com>
Message-ID: <slrng352cq.7sr.nick@irishsea.home.craig-wood.com>

Henrique Dante de Almeida <hdante at gmail.com> wrote:
>  On May 19, 10:28?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > I cannot predict "acceptable speed" requirements, but I can tell that
> > there will be some clients downloading 100MB report files from the
> > server, so I presume that I will need a progress bar. I think that I
> > need to develop my own protocol for this, and probably the underlying
> 
>   Okay, so you need to wrap large binary files in some kind of message,
>  without pre processing them. I think developing your own protocol
>  using XDR is a safe bet.

You might want to consider using netstrings rather than XDR

  http://cr.yp.to/proto/netstrings.txt

They are very simple and would be minimal overhead if all you are
passing is a file and a bit of metadata.

You'll find several modules for python with a bit of searching.  Also
I believe twisted supports them directly or you could easily roll your
own.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mabbikeel at gmail.com  Sun May 18 14:06:10 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 19:06:10 +0100
Subject: Compress a string
Message-ID: <op.ubc28kc14fd8pl@mp1206-hp.config>

Hi guys,

I'm trying to compress a string.
E.g:
  "AAAABBBC" -> "ABC"

The code I have so far feels like it could be made clearer and more  
succinct, but a solution is currently escaping me.


def compress_str(str):
     new_str = ""
     for i, c in enumerate(str):
         try:
             if c != str[i+1]:
                 new_str += c
         except IndexError:
             new_str += c
     return new_str


Cheers
Matt
-- 
--



From wuwei23 at gmail.com  Wed May 21 21:47:28 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 18:47:28 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <ed46f401-9c6c-46eb-a6db-f14947e8c24a@y22g2000prd.googlegroups.com>

On May 22, 6:10 am, notbob <not... at nothome.com> wrote:
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?

Python has 71 built in functions (in 2.5). Atwood's list of PHP built
ins beginning with 'a' is 124 functions long.

There's a clear reason why people say Python "fits your brain" :)


From jtc at theworld.com  Sun May 11 20:43:08 2008
From: jtc at theworld.com (Jonathsn Cronin)
Date: Mon, 12 May 2008 00:43:08 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <0001HW.C44D0ADD008F9F39F0284530@news.verizon.net>

On Sun, 11 May 2008 16:16:53 -0400, John Salerno wrote
(in message <48275446$0$11628$607ed4bc at cv.net>):

> XLiIV wrote:
> 
>> The range() function returns a list and list is a sequence, isn't?
> 
> I think you're missing the point. To me, there seems to be a fundamental 
> difference between these two things:
> 
> ---
> 
> people = ['Sam', 'Bob', 'Fred']
> 
> for name in people:
>      print name
> 
> ---
> 
> AND
> 
> ---
> 
> num = 33
> 
> for x in xrange(10):
>      print num += 1
> 
> ---
> 
> To me, the first example is a pure use of the for loop. You are 
> iterating through an object and *using* the items you are stepping through.
> 
> The second example, however, is simply doing something 10 times, and 
> what it's doing has nothing to do with 'x' or xrange. So it seems like 
> an abuse of the for loop.

I agree in principle; the first is iteration and the second is repetition.
In Python, the common idiom for a fixed number of repetitions is iterating 
over a number range.  This is true in most languages I am familiar with, 
probably because fixed repetition, where you don't care about the "index" 
value, is rarely used.

The only language I've used that does have fixed repetition is an (old) 
dialect of lisp, and I'm not sure it even made it into Common Lisp.  
Smalltalk and Ruby do have fixed repetition.

Using range may not be entirely elegant, but is pragmatic, and not, to me, 
particularly ugly.  In Python, unlike some languages, you don't have to 
declare the x.

I think you could add it without too much change to the parsing.

for <expression>:
  <block>

Seeing a ":" instead of "in" would mean a repetition statement which would
be interpreted as:
-- if <expression> evaluates to an integer, execute the block that number of 
times.
-- If <expression> evaluates to an iterator, execute the block until the 
iterator is exhausted.

Even if possible, I see this at best a minor improvement and more likely a 
negative because the for keyword is now overloaded. (see "static" in C/Java.) 
You could add a new keyword but the benefit here is much to small to justify 
the trouble.

Jonathan



From google at mrabarnett.plus.com  Wed May 14 18:55:47 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 14 May 2008 15:55:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
Message-ID: <1e4287a7-321c-432a-9217-c97a91ec18b1@y21g2000hsf.googlegroups.com>

On May 14, 10:30 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > Dave Parker schrieb:
> > > All of the calculators and textbooks that elementary school students
> > > use, use "^" for powers.
>
> I've never seen this symbol in textbooks. In textbooks, powers are
> written using superscript.
>
> >>  Just like Flaming Thunder does.  I haven't
> > > seen "**" for powers since FORTRAN.
>
> I haven't seen any language using '^' as the power operator so far -
> but I've seen quite a lot of them using it as the bitwise XOR operator.

BASIC and Comal use '^' as the power operator.


From gandalf at shopzeus.com  Fri May 16 07:42:03 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 13:42:03 +0200
Subject: ply yacc lineno not working?
In-Reply-To: <482D70F0.9070202@shopzeus.com>
References: <482D70F0.9070202@shopzeus.com>
Message-ID: <482D730B.9090607@shopzeus.com>

I'm sorry for the dumb question. I had to add these to the lexer:

def t_comment(t):
    r"\#[^\n]*\n"
    t.lexer.lineno += 1
    # We do not return anything - comments are ignored.

# Define a rule so we can track line numbers
def t_newline(t):
    r'\n+'
    t.lexer.lineno += len(t.value)


Well, it is not very straightforward. From the docs, it was not clear 
that I HAVE TO increment t.lexer.lineno in my lexer if you want yacc to 
parse line numbers. But it is logical. I believe this could be done 
automatically, since "line number" ALWAYS means "\n", there is nothing 
to be configured here. (Am I wrong? There can be parsers to parse files 
where new lines are chr(255) or something?)

Thanks,

   Laszlo



From michael.pearmain at tangozebra.com  Sun May 18 15:55:26 2008
From: michael.pearmain at tangozebra.com (Mike P)
Date: Sun, 18 May 2008 12:55:26 -0700 (PDT)
Subject: Rpy Module
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
	<ad4327b8-c98f-466f-90f1-347d9ce08a96@j33g2000pri.googlegroups.com>
Message-ID: <054ecd85-997e-417b-80d7-ee5c5f89e611@l42g2000hsc.googlegroups.com>

Superb, thanks



From tjreedy at udel.edu  Sat May 17 12:13:47 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 May 2008 12:13:47 -0400
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com><0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
	<g0mvc2$sic$1@news.xmission.com>
Message-ID: <g0n07r$liv$1@ger.gmane.org>


"dave" <squareswallower at 1ya2hoo3.net> wrote in message 
news:g0mvc2$sic$1 at news.xmission.com...
| bear,
| thanks for the suggestions.  I use IDLE to write the code and when it's
| working I paste it over into a new window.

Or you can just save code you want to keep to a new name.

| To add doctests would I need to use a certain
| filename for the tests to be run on?

You can run a doctest on a file from within the file (as well as from 
without).

if __name__ == '__main__': <run doctest>

I presume the manual gives the details.

|  Can you have doctests on random functions?

???

tjr





From badmuthahubbard at gmail.com  Sat May 10 11:58:23 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sat, 10 May 2008 18:58:23 +0300
Subject: People still using Tkinter?
In-Reply-To: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
Message-ID: <8200bab70805100858m11c57dc7l7a1ac19d6e3928d4@mail.gmail.com>

I am, but "still" isn't the word, I just started.  Good, *complete*
docs seem to be hard to find, but using a combination of the free
resources and going back and forth between them seems to work all
right so far.

-Chuckk

On Sat, May 10, 2008 at 8:20 AM, Kenneth McDonald
<kenneth.m.mcdonald at sbcglobal.net> wrote:
> Any guesses as to how many people are still using Tkinter? And can anyone
> direct me to good, current docs for Tkinter?
>
> Thanks,
> Ken
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From jkrukoff at ltgc.com  Thu May 15 19:48:53 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:48:53 -0600
Subject: no inputstream?
In-Reply-To: <1210894979.3312.14.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>  <1210894364.3312.10.camel@jmk>
	<1210894979.3312.14.camel@jmk>
Message-ID: <1210895333.3312.17.camel@jmk>


On Thu, 2008-05-15 at 17:42 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > > > >
> > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > i buffer and parse.  apologies if i misrepresented my code!
> > > > >
> > > > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > work:
> > > > >
> > > > > > from mutagen.mp3 import MP3
> > > > > > id3tags = MP3(urllib2.urlopen(URL))
> > > > >
> > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > string or buffer, instance found".  does this mean i need to convert
> > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > > > directory" errors, with a few HTTP 404s.
> > > > >
> > > > > [snip]
> > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > contents.
> > > > 
> > > > cool, so how do i give it the path, if not in the form of a URL
> > > > string?  maybe this is obvious...
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > 
> > > It doesn't look like you can, with mutagen. So, time to find a different
> > > library that supports arbitrary file objects instead of only file paths.
> > > I'd suggest starting here:
> > > http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> > > 
> > > Possibly one with actual documentation, since that would also be a step
> > > up from mutagen.
> > > 
> > 
> > After a bit of time looking around, looks like nearly all the python id3
> > modules expect to work with filenames, instead of file objects.
> > 
> > I can't vouch for it, and the documentation still looks sparse, but this
> > module at least looks capable of accepting a file object:
> > http://pypi.python.org/pypi/tagpy
> > 
> > Looks like it'd be a challenge to build if you're on windows, since it
> > depends on an external library.
> > 
> > Alternately, you could probably create a subclass of the mutagen stuff
> > that used an existing file object instead of opening a new one. No idea
> > what that might break, but seems like it would be worth a try.
> > 
> > As last ditch option, could write the first few kb of the file out to a
> > temp file and see if mutagen will load the partial file.
> > 
> 
> Okay, now I'm officially spending too much time looking through this
> stuff.
> 
> However, looks like the "load" method of the MP3 class is what you'd
> want to override to change mutagen's file loading behavior. Probably
> pass the URL as the filename, and take a cut & paste version of the
> default load method from ID3FileType and change it to use urllib2 to
> open it instead of a local file open.
> 
> Might work. Might not. No warranty express or implied.

Hrm, damn, looks like you'd also have to create a custom ID3 class and
override load there too, since that gets called from the ID3FileType
load method. Definitely looks like work.
-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From bruno.desthuilliers at gmail.com  Wed May 14 16:35:19 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:35:19 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
Message-ID: <2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>

On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> George Sakkis <george.sak... at gmail.com> writes:
> > On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> >> > An instance method works on the instance
> >> > A Static method is basically a function nested within a class object
> >> > A class method is overkill?
>
> >> If anything, a static method is overkill. See it this way: *if* you for some
> >> reason put a method into an enclosing context - isn't it worth having a
> >> reference to that?
>
> > My feeling exactly; these days I almost always use class methods
> > instead of static. I vaguely remember seeing somewhere an example
> > where a static method was the only (elegant) solution; neither a class
> > method nor a plain function would do. I'll post it if I find it unless
> > someone beats me to it.
>
> > George
>
> __new__ is a static method!

__new__ is a special-cased staticmethod that  1/ must not be declared
as such and 2/ takes the class object as first args. As far as I'm
concerned, it's semantically a classmethod.


From marlin_rowley at hotmail.com  Thu May 15 11:59:59 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 10:59:59 -0500
Subject: unpack() exploration!
Message-ID: <BAY135-W2733F32ABD7DC1DAD7FCB49FC90@phx.gbl>


All:

I've got a script that runs really slow because I'm reading from a stream a byte at a time:

// TERRIBLE
for y in range( height ):
        for color in range(4):
            for x in range( width ):
                    pixelComponent = fileIO.read(4)
                    buffer = unpack("!f",pixelComponent)  << unpacks ONE float, but we now can do something with that pixel component.


I can speed this up dramatically if I did this:

// MUCH FASTER
for y in range( height ):
    for color in range(4):
        pixelComponent = fileIO.read(4*width) <<<<<<<<<  GET a LOT more data from the stream into memory FIRST!!
        for x in range( width ):
           buffer = unpack( ?????? ) <<<< how do I get each float from the pixelComponent???


-M



_________________________________________________________________
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From Matthew.Moorland at gmail.com  Mon May  5 01:35:43 2008
From: Matthew.Moorland at gmail.com (ETP)
Date: Sun, 4 May 2008 22:35:43 -0700 (PDT)
Subject: USB HID documentation?
Message-ID: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>

I have a little robot project I'm programming in python using the
Lynxmotion SSC-32 servo controller via serial.  I'd like to use a USB
game controller (PS2 style) to control the robot.

I've read a number of threads about the difficulty of using USB
without extensive understanding of the way it works, but a few have
stated that HID is different somehow.  I definitely do not have any
USB knowledge, and I don't care to get into that.  However, if USB-HID
is much simpler I would love to learn.

I have the python extensions for windows:
     http://sourceforge.net/project/showfiles.php?group_id=78018
but I haven't found any documentation on how to implement HID in
python.  Can anyone give me some examples or links?

Thanks much.


From tjreedy at udel.edu  Mon May 12 02:09:09 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 02:09:09 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
Message-ID: <g08mu3$e29$1@ger.gmane.org>


"Mark Dickinson" <dickinsm at gmail.com> wrote in message 
news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
|> Do you have in mind any situations in which it is advantageous to have 
0**0
|> undefined?

| (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))

Which, of course, I was not, but for the sake of discussion....

| then it's not at all clear that 0.**0. should be considered well-defined.

Then it seems equally dubious that 0.**y, y>0, should be well-defined.
It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
defined whether y is 0 or not, even though there is a discontinuity in the 
limit.
.
...
| The big problem here is that the power operation is really trying
| to combine two subtly different functionalities (integer powers
| and real powers), with quite distinct use-cases, into a single
| function.  Which leads to problems:  witness the mess that's
| C99's pow specification:  why does it make sense for (-2.0)**2.0 to
| return 4.0, while (-2.0)**1.999999999 returns NaN?

2.5 raises an exception.  In 3.0,
>>> (-2)**1.99999999
(3.9999999722741113-1.2566370355167477e-07j)

| Incidentally, the decimal module is slightly schizophrenic about this:

That module follows the IBM-led standard, no matter how crazy.

Terry Jan Reedy





From vivainio at gmail.com  Mon May  5 17:57:38 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 21:57:38 GMT
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
Message-ID: <1w4gs9bk.fsf@gmail.com>

Paul Boddie <paul at boddie.org.uk> writes:

> Anyway, I'm just confirming that I'm clearly not one of the "many"
> described above. A lot of my own work is licensed under the GPL or

I guess it's safe to assume that you are not opposed to using code
based on more liberal license, right? :-)

My point is: GPL is a reason to reject a tool for some, but MIT/BSD
never is. Ultimately, of course, it's up to the preferences of the
author but if the idea is to maximize the popularity, GPL is a worse
bet.


From kyrie at uh.cu  Fri May 16 16:31:39 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 16 May 2008 16:31:39 -0400
Subject: encoding problem
Message-ID: <200805161631.39307.kyrie@uh.cu>


Hi, guys.
I'm trying to read an xml file and output some of the nodes. For that, I'm 
doing a 
print node.toprettyxml()

However, I get this exception:

===
    out.write(tag.toxml())
UnicodeEncodeError: 'ascii' codec can't encode character u'\xba' in position 
190: ordinal not in range(128)
===

That happens if I "print" it, or send it to stdout, or send it to a file.

How can I fix it? 
cat file works perfectly, and I'm using an utf8 terminal.

I'm particularly puzzled that it won't work even if I write to a file opened 
in "b" mode. Worst thing is... I don't really need that character, just a 
general idea of how the document looks like.

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From ivlenin at gmail.com  Sun May 25 22:42:58 2008
From: ivlenin at gmail.com (I V)
Date: Mon, 26 May 2008 02:42:58 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
	<a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>
Message-ID: <Ssp_j.2026$jI5.529@flpi148.ffdc.sbc.com>

On Sun, 25 May 2008 18:42:06 -0700, notnorwegian wrote:
> def scrapeSites(startAddress):
>     site = startAddress
>     sites = set()
>     iterator = iter(sites)
>     pos = 0
>     while pos < 10:#len(sites):
>         newsites = scrapeSite(site)
>         joinSets(sites, newsites)

You change the size of "sites" here, which means you can no longer use 
the iterator.

> wtf? im not multithreading or anything so how can the size change here?

How about:

def scrape_sites(start_address):
	sites = set([start_address])
	sites_scraped = set()
	# This will run until it doesn't find any new sites, which may be 
	# a long time
	while len(sites) > 0:
		new_sites = set()
		for site in sites:
			new_sites.update(scrape_site(site))
		sites_scraped.update(sites)
		sites = new_sites.difference(sites_scraped)
	return sites


From paddy3118 at googlemail.com  Mon May 12 02:27:23 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 11 May 2008 23:27:23 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
Message-ID: <3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>

On May 11, 9:28 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
Hi John, Arnaud;

> Contrived example:
>
> # Print 'hello' 10 times; x is not used
> for x in xrange(10):
>     print 'hello'

I've used Fortran and C and so would tend to use either i,j,k as the
unused loop variable above, or, for clarity, call it something
descriptive like loop_count, if the loop body would be clearer.

I would also just use range for small, (especially small constant),
ranges.

>
> # By changing what is iterated over, no unused variable:
> from itertools import repeat
> for msg in repeat('hello', 10):
>     print msg
I guess I would not go to the trouble of using itertools.repeat unless
it was simplifying/homogenising a larger expression - i.e if it was
part of some functional expression

I've never fealt the need for a separate repeat statement myself
either.

- Paddy.

P.S: I do understand that your examples are contrived. Just my
thoughts.



From greg at cosc.canterbury.ac.nz  Thu May 15 04:52:35 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 15 May 2008 20:52:35 +1200
Subject: ANN: Pyrex 0.9.8
Message-ID: <mailman.1164.1210860644.12834.python-announce-list@python.org>

Pyrex 0.9.8 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

This version has a number of new features:

* In-place operators (+= etc.) are now supported.

* The Pyrex compiler now has built-in facilities for
   automatically tracking down and compiling all the
   modules a given module depends on, and for only
   compiling modules whose source has changed.

* Some restrictions on nogil functions have been relaxed.
   In particular, it's now possible to declare a C method
   as nogil.

* A feature has been added that makes it easier to manage
   circular imports between .pxd files. It's now possible
   to declare two extension types in different .pxd files
   that refer to each other.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From mishok13 at gmail.com  Tue May 27 11:55:02 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 18:55:02 +0300
Subject: New chairman
In-Reply-To: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
Message-ID: <192840a00805270855i20ccdb1clfafe8bff575dbd59@mail.gmail.com>

2008/5/27 Sverker Nilsson <sn at sncs.se>:
> I dont want to be a new Guido. Somebody else please.
>

    Please, explain why should we fork Python? Because Python 3.0 will
have 'print' as a function, not as a statement, am I right? Or maybe
the reason is a major breakage of C API in Python 3.0, so that
Guppy-PE/Heapy will both need a complete re-write? There is a
rationale for these changes and you've been told about it several
times, but you don't care much to listen.
    Well, anyway, nobody stops you from forking a project called
'Python'. Python is free software, as you know.

> S.
>
>
> On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
>> I was talking about Guido van Rossum
>>
>> The one who decides, so far when people agree
>>
>> But we can make a new fork
>>
>> He is the originator, but now it seems, for me, it is hanging out in
>> the air
>>
>> So we need some new leadership
>>
>> From somebody, somebody like you perhaps. Or me.
>>
>> Sverker
>>
>> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
>> wrote:
>>
>> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>>
>> > > seems to be needed
>>
>> > > He doesn't seem to care much anyway now
>>
>> > > Or if he cares, he have many other assignments
>>
>> > Who are you talking about?
>>
>> > > So should we try to elect a new chairman?
>>
>> > Chairman? Elaborate please.
>>
>> > > I am probably not eligible. There must be many others.!
>>
>> > > Do you dare?consper
>>
>> > Hm, are you and castrionpi twin brothers or something?
>>
>> > > S.
>> > > --
>> > >http://mail.python.org/mailman/listinfo/python-list
>>
>> > --
>> > Wbr, Andrii Mishkovskyi.
>>
>> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From roy at panix.com  Wed May 21 08:40:37 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 08:40:37 -0400
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <roy-461748.08403721052008@70-1-84-166.area1.spcsdns.net>

In article 
<2fc55c56-7408-4f44-b6e2-64f85f341ac9 at i36g2000prf.googlegroups.com>,
 srinivas <srinivas.puvvala at gmail.com> wrote:

> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
> 
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
> 
> pls help me friends how to do that.

You need to either:

1) Put your modules in some directory that's already on your python path.  
To find out what your path is, do:

import sys
print sys.path

It should include a directory which ends in "site-packages".  Just drop 
your modules into that directory.

2) Add the directory where you modules are to your python path.  The 
easiest way to do this is to set PYTHONPATH in your environment.


From kyrie at uh.cu  Mon May 19 16:29:38 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Mon, 19 May 2008 16:29:38 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <200805191629.38919.kyrie@uh.cu>

On Monday 19 May 2008 03:39:36 pm destroooooy wrote:
> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.

It's not arbitrary, and you shouldn't be using that convention.

The question is really about "equality" versus "identity". Two identical sized 
cubes may be equal, but they are certainly not the same cube. The main 
concept here: identity [usually] implies equality, but equality almost never 
implies identity (two objects that are equal may be distinct nonetheless).

More practical example, two angles with the same measure are equal by every 
mathematical concept, but opposing angles on a parallelogram are not the same 
one.

Sometimes, you need to test for equality, as in "is this user input equal 
to '1'?". Sometimes, you need to test for identity "is this user input 
this '1' that I have here?" (note: the second answer should be 'no', unless 
that by some dark magic the user manages to get that same '1' that is in your 
code).

The most common use case is equality. You test for equality with == and !=.
The darker case is identity. You test for identity with "is" and "is not". 
Whenever you use "is", ask yourself a question: does a negative answer makes 
sense if the objects are equal?

Personally, I like to use "is" with singletons. I find it easier to type and 
read "if param is None" than "if param == None", but some python developers 
dislike the first one because of the "dark magic" involved in knowing that 
None is a singleton.

When in doubt, test for equality. Use "is" only when you are certain that you 
know the difference. Python does some optimizations that may it seem like it 
is working with 'is' at first, but it really isn't:

In: a="hi"
In: b="hi"
In: a is b
Out: True        <-- dark magic here, python optimized the string storage,
In: a is "h"+"i" <-- by using the same object instead of creating a new one
Out: False       <-- but even that won't always work, so
                       

In: a="a very long string, at least longer than 'hi'"
In: b="a very long string, at least longer than 'hi'"
In: a is b
Out: False       <-- never, never rely on magic.

I hope I was useful.

Cheers,

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From wuwei23 at gmail.com  Thu May 22 04:59:28 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 01:59:28 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com>
Message-ID: <2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com>

On May 22, 6:22 pm, jonbutle... at googlemail.com wrote:
> Still getting very odd errors though, this being the latest:
>
> Traceback (most recent call last):
>   File "spider.py", line 38, in <module>
> [...snip...]
>     raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
> httplib.InvalidURL: nonnumeric port: ''

Okay. What I did was put some output in your Spider.parse method:

    def parse(self, page):
        try:
            print 'http://' + page
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

And here's the output:

    >python spider.py
    What site would you like to scan? http://www.google.com
    http://www.google.com
    http://http://images.google.com.au/imghp?hl=en&tab=wi

The links you're finding on each page already have the protocol
specified. I'd remove the 'http://' addition from parse, and just add
it to 'site' in the main section.

    if __name__ == '__main__':
        s = Spider()
        site = raw_input("What site would you like to scan? http://")
        site = 'http://' + site
        s.crawl(site)

> Also could you explain why I needed to add that
> HTMLParser.__init__(self) line? Does it matter that I have overwritten
> the __init__ function of spider?

You haven't overwritten Spider.__init__. What you're doing every time
you create a Spider object is first get HTMLParser to initialise it as
it would any other HTMLParser object - which is what adds the .rawdata
attribute to each HTMLParser instance - *and then* doing the Spider-
specific initialisation you need.

Here's an abbreviated copy of the actual HTMLParser class featuring
only its __init__ and reset methods:

    class HTMLParser(markupbase.ParserBase):
        def __init__(self):
            """Initialize and reset this instance."""
            self.reset()

        def reset(self):
            """Reset this instance.  Loses all unprocessed data."""
            self.rawdata = ''
            self.lasttag = '???'
            self.interesting = interesting_normal
            markupbase.ParserBase.reset(self)

When you initialise an instance of HTMLParser, it calls its reset
method, which sets rawdata to an empty string, or adds it to the
instance if it doesn't already exist. So when you call
HTMLParser.__init__(self) in Spider.__init__(), it executes the reset
method on the Spider instance, which it inherits from HTMLParser...

Are you familiar with object oriented design at all? If you're not,
let me know and I'll track down some decent intro docs. Inheritance is
a pretty fundamental concept but I don't think I'm doing it justice.


From goldnery at gmail.com  Mon May 26 18:26:50 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 15:26:50 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
Message-ID: <4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com>

On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com>
> wrote:
>
> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > > Thanks!
> > > Anyone know which library should i learn then?
>
> > Looks like you need to dive into Win32 APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://ms...
> > and others
> > combined with ctypes.
>
> > Ivan
>
> well, that seems extremely valuable but how can i implement those
> functions with python?

You know what I'm sorry, I will try to understand the ctypes lib
before bothering you.

thank you all!


From kwmsmith at gmail.com  Thu May 22 13:49:39 2008
From: kwmsmith at gmail.com (Kurt Smith)
Date: Thu, 22 May 2008 12:49:39 -0500
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>

On Thu, May 22, 2008 at 10:55 AM, duli <dulipishi at gmail.com> wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.

The bigger the project, the more likely it is that you'll have
documentation on how to use it (for a language or library, how to use
the features in your program) but to take the time to write up a
dead-tree book on the project's "inception, problem definition,
design, coding and final delivery" is not likely well spent.  Anyone
who has the expertise to write such a book would probably be spending
his time working on the next phase of the project itself.

Someone will probably respond with an amazon link to a book that does
exactly what you're asking, in which case, I will stand corrected.
But I'll be surprised.

>
> Most of the code I have written and books that I have read deal with
> toy programs and I am looking for something a bit more
> comprehensive.  For example, maybe a complete compiler written in C++
> for some language, or a complete web server or implementing
> .net libraries in some language (just a few examples of the scale of
> things I am interested in learning).

It seems to me the reason toy programs are so prevalent is because
they illustrate a (few) well defined ideas in a short amount of code.
A big project, necessarily, brings together all kinds of stuff, much
of which may not interest the author at all, and so doesn't motivate
him to write a book about it.

Compilers, web servers & .NET libraries are *widely* varying areas.
You may have interest in them all, but to significantly contribute to
any requires a fair amount of expertise and specialization.

The best route I've found to learn how to organize & program large
scale applications is this: find a cutting edge program that interests
you and that is open source.  Download its source, and read the code.
Diagram it.  Map it out.  Read the comments.  Join the mailing list
(probably the developer's list), lurk for a while, and ask questions
about why they organized things the way they did.  Get the overall big
picture and learn from it.  Better yet, find out what pitfalls they
found and avoided (or fell into).  Compare their approach &
organization with another competing project.  This is the wonder of
open source software -- you have access to everything, and can learn
from all the expertise the developers put into their opus.

You can learn the basics from books, but nothing beats analyzing a
species in the wild.

Kurt


From nospam at here.com  Sun May 18 15:28:34 2008
From: nospam at here.com (Dennis)
Date: Sun, 18 May 2008 20:28:34 +0100
Subject: python confusion possibly related to pickle
Message-ID: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>


I have a problem that I don't understand at all. I run a python script, 
which uses pickle, and it fails. That alone is, perhaps, no big deal.

The problem that's got me annoyed is that after getting said error I 
close the shell window, open a new one, run the python interpreter and 
type "import pickle" and get the error that the script I'd run earlier 
caused. Why is this ?

To my knowledge, once python stopped running it didn't store anything 
related to the last time it was run.


From ivan.illarionov at gmail.com  Sat May  3 21:20:29 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 4 May 2008 01:20:29 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
	<fvirho$15ti$2@news.mtu.ru>
	<9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>
Message-ID: <fvj30t$17uu$1@news.mtu.ru>

On Sat, 03 May 2008 17:43:57 -0700, George Sakkis wrote:

> On May 3, 7:12?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:
>> > On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
>> >> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>>
>> >> > Arnaud Delobelle wrote:
>>
>> >> >> sum() works for any sequence of objects with an __add__ method,
>> >> >> not just floats! ?Your algorithm is specific to floats.
>>
>> >> > This occurred to me also, but then I tried
>>
>> >> > sum(['abc', 'efg'], '')
>>
>> >> Interesting, I always thought that sum is like shortcut of
>> >> reduce(operator.add, ...), but I was mistaken.
>>
>> >> reduce() is more forgiving:
>> >> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
>> > Hm, it works for lists:
>> > sum(([1], [2]), [])
>> > [1, 2]
> 
> So it's not reduce() that is more forgiving, it's sum() that makes an
> exception for strings only.
> 
> 
>> > However I find the seccond argument hack ugly. Does the sum way have
>> > any performance advantages over the reduce way?
>>
>> Yes, sum() is faster:
>>
>> $ python -m timeit "" "sum([[1], [2], [3, 4]], [])" 100000 loops, best
>> of 3: 6.16 usec per loop
>>
>> $ python -m timeit "import operator" \ "reduce(operator.add, [[1], [2],
>> [3, 4]])" 100000 loops, best of 3: 11.9 usec per loop
> 
> Not really; you measure the import and the attribute access time in the
> second case. sum() is 2x faster for adding numbers only:
> 
> # Adding integers
> python -mtimeit --setup="x=[1]*100" "sum(x)" 100000 loops, best of 3:
> 4.87 usec per loop python -mtimeit --setup="from operator import add;
> x=[1]*100" "reduce(add,x)"
> 100000 loops, best of 3: 10.1 usec per loop
> 
> # Adding floats
> python -mtimeit --setup="x=[1.0]*100" "sum(x)" 100000 loops, best of 3:
> 5.14 usec per loop python -mtimeit --setup="from operator import add;
> x=[1.0]*100" "reduce(add,x)"
> 100000 loops, best of 3: 10.1 usec per loop
> 
> # Adding tuples
> python -mtimeit --setup="x=[(1,)]*100" "sum(x,())" 10000 loops, best of
> 3: 61.6 usec per loop python -mtimeit --setup="from operator import add;
> x=[(1,)]*100" "reduce(add,x,())"
> 10000 loops, best of 3: 66.3 usec per loop
> 
> # Adding lists
> python -mtimeit --setup="x=[[1]]*100" "sum(x,[])" 10000 loops, best of
> 3: 79.9 usec per loop python -mtimeit --setup="from operator import add;
> x=[[1]]*100" "reduce(add,x,[])"
> 10000 loops, best of 3: 84.3 usec per loop
> 
> George

Thanks for correction. Forget about --setup.

-- 
Ivan


From tjreedy at udel.edu  Thu May 15 03:06:54 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 15 May 2008 03:06:54 -0400
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <g0gnea$o0b$1@ger.gmane.org>


"urikaluzhny" <ukaluzhny at nds.com> wrote in message 
news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
| It seems that I rather frequently need a list or iterator of the form
| [x for x in <> while <>]

I can think of two ways to interpret that.

| And there is no one like this.
| May be there is another short way to write it (not as a loop). Is
| there?

Using loops to write an example of what you mean would make the above 
clearer.

tjr





From j.spies at hccnet.nl  Mon May 19 15:24:39 2008
From: j.spies at hccnet.nl (Jaap Spies)
Date: Mon, 19 May 2008 21:24:39 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>
	<f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>
Message-ID: <32aef$4831d3f8$d4785a98$9215@cache6.tilbu1.nb.home.nl>

Vicent Giner wrote:
> Thank you very much for all the answers I've got.
> 
> As far as I have understood, Python can be a good alternative, or, at
> least, a reasonable choice.
> 
> I intend to design new algorithms for a kind of Optimization problems,
> and then I have to implement them and show/prove that they are good
> enough, in terms of effectiveness (quality of the solution that the
> algorithm is able to find, for some given "difficult" problems), and
> not mainly in terms of efficiency (time to find the solution).
> 
> I mean, in order to prove that my algorithms are "good", I have to
> compare them with the results given by other algorithms, in terms of
> how much better is the solution given by my proposal, in front of the
> previous ones. Only comparatives in terms of "number of iterations",
> and not "time to find the solution", can be done (I think).
> 

Here you find good company in the Sage developers community!

Jaap


> And I also realize, from your posted answers, that the point is doing
> a good programming work, and that I will have to look very carefully
> at all those packages and resources you have mentioned, to do a good
> work at Python.
> 
> Any other suggestion will be welcomed.    :-)
> 
> Thank you very much again!
> 
> --
> Vicent


From mattheww at chiark.greenend.org.uk  Wed May 21 18:09:36 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 21 May 2008 23:09:36 +0100 (BST)
Subject: Running programs under a python program...
References: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>
Message-ID: <u2c*ODsds@news.chiark.greenend.org.uk>

samslists at gmail.com <samslists at gmail.com> wrote:
> So I have a python program that runs a bunch of other programs....it
> then loops forever, occasionally executing other programs.
>
> To run each of these programs my python code executes:
> subprocess.Popen(command_line, shell=True, stdout=fd,
> stderr=subprocess.STDOUT)
>
> where command_line is an appropriate command line.  :)
>
> Now my problem is when I abort this program it kills off all the child
> processes I've started. In this case I don't want that.   How can I
> stop the child processes from dieing when I kill off the parent?

It depends on why the children are dying.

>From what you say, it seems likely that they're trying to write to
their standard output, and exiting because that's a pipe that is now
closed.

If that's the case, it's probably best to start by deciding where you
want that output to go when the parent process has ended. Perhaps you
can just send it all to a log file in the first place.

-M-



From pataphor at gmail.com  Sun May 18 02:50:23 2008
From: pataphor at gmail.com (pataphor)
Date: Sun, 18 May 2008 08:50:23 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
Message-ID: <MPG.2299f0055cfb7860989685@nntp.aioe.org>

In article <hjlt245hnhrle11khpupg6fppr000f8f51 at 4ax.com>, 
dullrich at sprynet.com says...

> >>   window.pos = (x,y)
> >>
> >> seems more natural than
> >>
> >>   window.SetPos(x,y);

Yes, and to assign a row in a matrix I'd also like to use either tuples 
or lists on the right side. 

>   def __add__(self, other):
>     return Row([x + y for x, y in zip(self, other)])
> 
> worked as hoped if self is a Row and other is a
> Row _or_ a list.)
> 
> Anyway, my m.rows[j] can't be a list, because
> I want to be able to say things like
> m.rows[0] += c*m.rows[2]. Allowing 
> m.rows[j] = [1,2,3] seems convenient, while
> requiring m.rows[j] = Row([1,2,3]) fixes
> this problem. Hmm.

I'm not sure how far you'd go along with Gabriel's idea of decoupling 
views from data but I think there isn't even a need for using a matrix 
as the underlying data type. Why not use a flat list and compute matrix 
positions according to a row or column adressing scheme on the fly? 

P.



From kyosohma at gmail.com  Thu May 22 13:04:40 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 10:04:40 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>

On May 22, 11:14?am, cm_gui <cmg... at gmail.com> wrote:
> Python is slow. ? ?Almost all of the web applications written in
> Python are slow. ? Zope/Plone is slow, sloow, so very slooow. ?Even
> Google Apps is not faster. ? Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

What about http://www.torontolife.com/ ? It uses Django...

Mike


From castironpi at gmail.com  Tue May 13 06:57:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:57:35 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>
Message-ID: <ab78c31e-347a-49c2-b62c-bd5e38f15bb4@27g2000hsf.googlegroups.com>

On May 13, 5:46?am, dannywebs... at googlemail.com wrote:
> On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
>
>
>
>
>
> > Hi - I have a list returned from popen/readlines, and am wondering how
> > to go about iterating over each item which was returned (rather than
> > currently having the whole lot returned).
>
> > so far:
>
> > >>> f=os.open("./get_hostnames").readlines
>
> > returns ['host1 host2 host3 ... hostN\n]'
>
> > i'd like to be in a position to iterate through these, grabbing each
> > host. ?I have played with transmuting to a str, and using split, and
> > this works, but I get the subscript brackets from the list output as
> > expected, as the list output is now a string literal, and this is not
> > what I want - and I think it's a bit long-winded to do a search 'n
> > replace on it - hence why I ask in the subject what's the best way.
>
> > >>> f=str(f)
> > >>> f.split()
>
> > ["['host1","host2", ... ,"hostN\n']"]
>
> > Any help is highly appreciated
>
> > ta
>
> > dan.
>
> I did indeed mean "os.popen", no "os.open"- Hide quoted text -
>
> - Show quoted text -

I do indeed write a pretty fine real-time, low-bandwidth, game.  It is
like real-time chess, and seen the movie, Tron.  Can't the P2Ps zip up
in an hour?


From roy at panix.com  Sat May 24 18:16:04 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 18:16:04 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
Message-ID: <roy-73D0E0.18160424052008@70-1-84-166.area1.spcsdns.net>

David <wizzardx at gmail.com> wrote:

> While it is possible to describe all problems in docs, it can be very
> hard to write actual test code.
> 
> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

In some cases, you can use mock objects to mimic the "can never happen" 
situations.  But, you are right, there are certainly cases which are 
difficult or impossible to test for.  TDD is a very powerful tool, but it's 
just that: a tool.  It's not a magic wand.

My suggestion is to make using TDD a habit, but don't turn it into a 
religion.  You will undoubtedly find places where it's just the wrong tool.  
Don't let the fact that it can't do everything keep you from using it when 
it makes sense.


From ian.g.kelly at gmail.com  Wed May 14 09:29:33 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 14 May 2008 07:29:33 -0600
Subject: list.__len__() or len(list)
In-Reply-To: <87r6c5s71g.fsf@mulj.homelinux.net>
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
	<87r6c5s71g.fsf@mulj.homelinux.net>
Message-ID: <3fc761710805140629yb2aa55ai4cf8f62522ea78d@mail.gmail.com>

On Wed, May 14, 2008 at 1:01 AM, Hrvoje Niksic <hniksic at xemacs.org> wrote:
>  Have you tried it?  __len__ is in fact marginally slower because it
>  involves a dict lookup, whereas the built-in len() knows how to cheat
>  and invoke __len__ through a slot in the C type struct very
>  efficiently.
>
>  $ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
>  1000000 loops, best of 3: 0.24 usec per loop
>  $ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
>  1000000 loops, best of 3: 0.347 usec per loop

For built-in types, sure.  For user-defined types in Python, it's the
other way around:

>>> setup = 'class L:\n  def __len__(self): return 42\nl = L()'
>>> t1 = timeit.Timer('len(l)', setup)
>>> t2 = timeit.Timer('l.__len__()', setup)
>>> t1.timeit()
0.63981378918270337
>>> t2.timeit()
0.41051271879526041


From grante at visi.com  Sun May 11 20:03:43 2008
From: grante at visi.com (Grant Edwards)
Date: Sun, 11 May 2008 19:03:43 -0500
Subject: python without while and other "explosive" statements
References: <mailman.949.1210549611.12834.python-list@python.org>
Message-ID: <0oGdnUfSYOXCFLrVnZ2dnUVZ_uLinZ2d@posted.visi>

On 2008-05-11, ivo talvet <ivo.talvet at gmail.com> wrote:

> Is it possible to have a python which not handle the execution of
> "while", "for", and other loop statements ? I would like to allow
> remote execution of python on a public irc channel, so i'm looking for
> techniques which would do so people won't be able to crash my computer
> (while 1: os.fork(1)), or at least won't won't freeze my python in a
> infinite loop, make it unresponsive.

The easiest thing to to is to limit the amount of files,
disk-space, file descriptors, inodes, memory, cpu, and
processes that the users are allowed.  If bash is your shell,
the builtin "ulimit" provides most of those features.  The file
system quota features provide the rest.

> Is there a compiling option (or better, something i can get
> with apt-get cos i think compiling myself and handle all the
> metastuff myself is somehow dirty) for have a "secure python"
> (you can guess what i mean by "secure" in my case) or must i
> touch myself the source disable some code lines ? If last
> solution, which modifications in which files should i do?

My advice is don't try to secure Python itself: secure the
environment in which the users are using it.

-- 
Grant Edwards                   grante             Yow!  Did I SELL OUT yet??
                                  at               
                               visi.com            


From amit.uttam at gmail.com  Wed May 21 18:48:48 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Wed, 21 May 2008 15:48:48 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
	<mailman.1366.1211238396.12834.python-list@python.org>
Message-ID: <46591c0a-7544-4674-8caa-fc56587e71b9@w8g2000prd.googlegroups.com>

On May 19, 4:05 pm, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Tue, 20 May 2008 06:58:28 +1000, <amit.ut... at gmail.com> wrote:
> > On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> >> amit.ut... at gmail.com writes:
> >> > I've recently jumped big time into python and I'm working on a
> >> > software program for testing automation.
>
> >> Welcome, to both fields :-)
>
> > Thanks! I am having a great time learning and coding in python. It's
> > an amazing programming language.
>
> >> > I had a question about proper logging of output. What I would like
> >> > is:
>
> >> >  1. a function syslog (to log output to log file only)
> >> >  2. a function stdout (to log output to stdout only)
> >> >  3. a function sslog (to log output to both log and stdout)
>
> >> > Right now I am using StandOut module
>
> >> Have you investigated the 'logging' module in the Python standard
> >> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> >> to meet your listed requirements, without need of external
> >> dependencies.
>
> > Hmm..Yeah I didn't realize python had its own standard logging
> > facility. I took a look at it and it seems to do the job. However, the
> > output seems to be syslog style output. In the program I am writing,
> > the log file stores all the output of the commands being run (e.g. tcl
> > scripts, etc). Will this be possible using the built in python logging
> > module?
>
> > Thanks,
> > Amit
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> You can define the format of the log output in basicConfig(), for example:
>
>  from logging import basicConfig, error, info, INFO
> ...
>    basicConfig(
>        datefmt='%Y%m%d_T%H%M%S',
>        filemode='a',
>        filename=LOG_PATH,
>        format='%(asctime)s,%(levelname)s,%(message)s',
>        level=INFO
>    )
>
> If you want to log the output of other commands in your log file, you can
> connect a pipe to that command.  Maybe look at "subprocess -- Subprocess
> management" inhttp://docs.python.org/lib/module-subprocess.html
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

Thanks for the reply.

Yeah I am using the subprocess module and I am able to capture the
output and save it to log a file. However, looking at module-logging
the output format is like syslog. What I want is my own custom log
file format. I wrote a separate module containing all the functions
for the logging but I can't seem to use it globally. How does one use
global variables in python?

Code:

# log.py - A base class that provides logging functionality.
#
# Copyright 2008 Amit Uttamchandani <auttamchandani at canoga.com>
#

import os
import sys

logfile = None
global logfile

def createLogFile(filename):
    '''Opens a file for logging.'''
    try:
        logfile = open(filename, 'w')
    except IOError:
        print 'Error: Cannot create log file: %s' %
os.abspath(logfile)
        sys.exit(0)

def stdlog(logstr):
    '''Writes output to stdout.'''
    sys.stdout.write(logstr)

def syslog(logstr):
    '''Writes output to logfile.'''
    logfile.write(logstr)

def agglog(logstr):
    '''Aggregate output of logstr.'''
    syslog(logstr)
    stdlog(logstr)

def closeLogFile():
    '''Closes the log file.'''
    logfile.close()


Thanks,
Amit


From darcy at druid.net  Sat May 24 16:34:14 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sat, 24 May 2008 16:34:14 -0400
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<18c1e6480805240851t9aa79b4u6f1056a37e011afa@mail.gmail.com>
Message-ID: <20080524163414.70b702b2.darcy@druid.net>

On Sat, 24 May 2008 17:51:23 +0200
David <wizzardx at gmail.com> wrote:
> Basically, with TDD you write the tests first, then the code which
> passes/fails the tests as appropriate. However, as you're writing the
> code you will also think of a lot of corner cases you should also
> handle. The natural way to do this is to add them to the code first.
> But with TDD you have to first write a test for the corner case, even
> if setting up test code for it is very complicated. So, you have these
> options:
> 
> - Take as much time as needed to put a complicated test case in place.

Absolutely.  You may think that it is slowing you down but I can assure
you that in the long run you are saving yourself time.

> - Don't add corner case to your code because you can't (don't have
> time to) write a test for it.

If you don't have time to write complete, working, tested code then you
have a problem with your boss/client, not your methodology.

> - Add the corner case handling to the code first, and try to add a
> test later if you have time for it.

Never!  It won't happen.

> Having to write tests for all code takes time. Instead of eg: 10 hours
> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
> writing all the tests, and 10 on the code.

In conventional development, 10 hours of code requires 90 hours of
testing, debugging and maintenance.  Under TDD (and agile in general)
you spend 20 hours testing and coding.  That's the real economics if
you want to deliver a good product.

> I think that automated tests can be very valuable for maintainability,
> making sure that you or other devs don't break something down the
> line. But these benefits must be worth the time (and general
> inconvenience) spent on adding/maintaining the tests.

I can assure you from experience that it always is worth the time.

> If I did start doing some kind of TDD, it would be more of the 'smoke
> test' variety. Call all of the functions with various parameters, test
> some common scenarios, all the 'low hanging fruit'. But don't spend a
> lot of time trying to test all possible scenarios and corner cases,
> 100% coverage, etc, unless I have enough time for it.

Penny wise, pound foolish.  Spend the time now or spend the time later
after your client complains.

> I'm going to read more on the subject (thanks to Ben for the link).
> Maybe I have some misconceptions.

Perhaps just lack of experience.  Read up on actual case studies.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From bbxx789_05ss at yahoo.com  Mon May 12 19:07:10 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 12 May 2008 16:07:10 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>
Message-ID: <57fc5176-db60-413d-99cf-d8a71574cfe8@27g2000hsf.googlegroups.com>

On May 12, 4:59?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 12, 1:54?pm, Jetus <stevegi... at gmail.com> wrote:
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
>
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> 1) Use BeautifulSoup to extract the path:
>
> JCCOGetImage.jsp?refnum=DN2007036179
>
> from the html page.
>

BeautifulSoup will allow you to locate and extract the href attribute:

javascript:openimagewin('JCCOGetImage.jsp?refnum=DN2007036179');

See: "The attributes of Tags" in the BS docs.

Then you can use string functions(preferable) or a regex to get
everything between the parentheses(remove the quotes around the path,
too)


From darcy at druid.net  Fri May  2 00:44:16 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 00:44:16 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87abj91j8u.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <20080502004416.94012685.darcy@druid.net>

On Fri, 02 May 2008 13:24:01 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> I much prefer "#! /usr/bin/python" because I want my Python programs
> to, by default, be run with the default Python, and depend on Python
> being installed by the operating system's package manager. On systems
> that use shebang lines and that actually have standardised filesystem
> locations, the default Python is found at '/usr/bin/python'.

You have lived a sheltered life.  Not every packaging system puts the
executible in /usr/bin.  Many systems use /usr/local/bin.  NetBSD
uses /usr/pkg/bin but allows you to define your own pkg root.
Using /usr/bin/env allows your code to run on all these systems.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From mattheww at chiark.greenend.org.uk  Sun May 25 09:11:08 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 14:11:08 +0100 (BST)
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
Message-ID: <4ob*BLLds@news.chiark.greenend.org.uk>

Diez B. Roggisch <deets at nospam.web.de> wrote:
>Sebastian 'lunar' Wiesner schrieb:
>> I guess, Apache does some kind of memory caching for files, which are often
>> requested and small enough to fit into the system memory.  May be, that's
>> what the OP is referring to ...

> I'm not aware of that, and I even more seriously doubt it. Because 
> caching is a complicated, domain-dependend subject that would 
> *immediately* cry for configuration - e.g. caching strategies and such.

This is available in current apache with mod_file_cache (for an
explicitly configured list of files). I think the circumstances where
you'd want to use it are quite rare.

-M-


From castironpi at gmail.com  Sat May 10 11:06:11 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 08:06:11 -0700 (PDT)
Subject: Now, as for the jokes: Python!
Message-ID: <c2eac462-3fcf-4c57-bb13-8d24082889ab@r66g2000hsg.googlegroups.com>

Dear Monty, Grail This.

The grail is unarmed and floating.  Stop posting the newsgroup.

Python is Monty Python.  In the sense of identity ascription, of
course.

Trivially not,

A Bartender.


From paul at boddie.org.uk  Wed May  7 06:27:20 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 03:27:20 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <d33ec9cb-5017-4b12-9790-c7c936338a4f@b64g2000hsa.googlegroups.com>

On 6 Mai, 11:43, Max M <m... at mxm.dk> wrote:
>

[Python Midi]

> It does not have real time support even though I did write it with that
> support in mind. I just never got around to write it as I did not need
> it myself.
>
> I also developed it on Windows and I found it to be a bore to get real
> time midi working.
>
> It would probably be easier now that I am on Linux.

I was previously quite interested in getting MIDI output working for a
game I wrote, and I suppose that the Python Midi package would have
been of interest (with pygame probably handling the interface to the
hardware), but given the bizarre kernel module gymnastics required to
support real-time output (and I still don't know if my sound hardware
actually supports MIDI directly or not), I decided in the end to use
timidity to generate normal audio files and to send those through the
sound system instead. Of course, that more or less eliminates any real-
time aspects.

Paul


From CLDWesterhof at gmail.com  Sat May  3 06:05:31 2008
From: CLDWesterhof at gmail.com (Decebal)
Date: Sat, 3 May 2008 03:05:31 -0700 (PDT)
Subject: How to use a parameter in a class
Message-ID: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>

I have the following class:
#####
class Dummy():
    value = 0
    def __init__(self, thisValue):
        print thisValue
        self.value = thisValue
        value = thisValue

    def testing(self):
        print 'In test: %d' % self.value

    def returnValue(self):
        return self.value

    result = someFuntion(default = value)
#####

But the last line does not work.
I would like to do a call like:
    dummy = Dummy(thisValue = 12)

And that someFunction gets a default value of 12. How can I do that?


From mediocre_person at hotmail.com  Fri May  2 15:14:17 2008
From: mediocre_person at hotmail.com (Nick J Chackowsky)
Date: Fri, 02 May 2008 14:14:17 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <32a12$481b6809$3524@news.teranews.com>

TkNeo wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>> TkNeo wrote:
>>> WHAT ?
>>> This is crazy
>> Crazy like a fox?
>>
>> a = [1, 2, 3]
>> try:
>>      a.index(99)
>> except:
>>      a.append(99)
>> finally:
>>      print a.index(99)
>>
>> MY question: which exception should I actually be catching there?
>> ** Posted fromhttp://www.teranews.com**
> 
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.
But -1 is a valid index in Python.
a = [1, 2, 3]
print a[-1]
** Posted from http://www.teranews.com **


From fetchinson at googlemail.com  Wed May 21 12:33:48 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 09:33:48 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <48343e56$0$5866$426a74cc@news.free.fr>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
Message-ID: <fbe2e2100805210933j30b4a737v400cb866a44b0010@mail.gmail.com>

>>> Or just:
>>>
>>> If command is "quit" ...
>>
>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>> for assigning and checking types.  For example, to read data from a
>> file and check for errors:
>>
>>      Read data from "input.txt".
>>      If data is an error then go to ...
>
> Arf ! A goto !

You are surely aware of the fact that the C source of python also uses
goto at tons of places. Is that Arf! too?

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From nicolas.dandrimont at gmail.com  Sat May 10 17:13:10 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Sat, 10 May 2008 23:13:10 +0200
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <20080510211310.GA24788@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-10 13:59:37 -0700]:

> If you are in the interactive prompt of the Python interpreter and you
> do this
> 
> print """Testing\"""   or   print '''Testing\'''
> 
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key;

That is because Python expects you to end the triple-quoted string with
three unescaped quotes.

> you have to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
> 
> [1]+  Stopped                 python
> 

That ^Z just suspends your Python interpreter. It has become a job you can
now bring to foreground again with "fg". (but it's a feature of your
shell, not of Python)

> 
> If you do
> 
> print "Testing\"   or   print 'Testing\'
> 
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?

The fact is, that triple-quoted strings can span on multiple lines, and
that single-quoted strings cannot (without the line ending with a "\").
So no, it's not a bug in the interpreter.

Regards,
-- 
Nicolas Dandrimont

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From bruno.desthuilliers at gmail.com  Thu May 15 16:58:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 15 May 2008 13:58:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com> 
	<e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com>
Message-ID: <d24568a8-ce7c-473b-b059-1edf41f6ffee@b64g2000hsa.googlegroups.com>

On 15 mai, 19:30, Lie <Lie.1... at gmail.com> wrote:
> On May 15, 4:08 am, "bruno.desthuilli... at gmail.com"
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > > single language compiler instead of three dimensional compiler that
> > > > GCC is (cross platform, cross target platform, cross language).
>
> > > And to add, I also need to mention that Python doesn't need to be
> > > compiled at all,
>
> > No language needs compilation - it's an implementation problem, not a
> > language problem. Now all the Python's implementations I know do use
> > compilation (to byte-code).
> > > its py and pyo file is architecture independent.
>
> > True, but this is not strictly related to being compiled or not.
>
> It's true, it's implementation problem whether a language is compiled
> or not, but what I was emphasizing was that Python's code is
> architecture independent at all stages (that is visible to the user
> and the programmer), on the other hand, a compiled code is a compiled
> code is a compiled code,

Ever wondered what all these .pyc files were ?

> it cannot be architecture independent without
> packing multiple binaries in the same executable (like in Macintosh's
> universal binary) or using an emulation (with huge overheads) or at
> least using a compatibility layer (which doesn't always work) and all
> this is done in the layer that is visible to user and programmer
> (programmer having to compile against everything and user having to
> download the correct executable) instead of being done in a platform
> independent way that interpreted language like Python have.

Python is not interpreted, because being interpreted is a feature of
an implementation, not of a language. And so far, no known Python
implementation is (strictly speaking) interpreted - they all compile
to byte-code. "compiled" doesn't necessarily imply "compiled to
platform native binary code", you know.

Ok, this may look like a bit on the splitting hairs side. But may I
remind you that to run ever a .pyc file, you do need to have the
Python runtime (VM + quite a lot of libs) installed one way (normal
install) or another (packed in something that looks like an ordinary
"executable" - whatever this means for the target platform) ? OTHO,
it's true that a .pyc file is platform-independant  - it just requires
the correct versions of quite a lot of platform-dependant binaries.
Wait... Isn't this code some kind of a "visible to the user and
programmer" "compatibilty layer" ?



From nik600 at gmail.com  Tue May 27 04:50:00 2008
From: nik600 at gmail.com (nik600)
Date: Tue, 27 May 2008 10:50:00 +0200
Subject: integration with browser
In-Reply-To: <6a0722F33j3q5U1@mid.uni-berlin.de>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
Message-ID: <9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>

On Mon, May 26, 2008 at 6:32 PM, Diez B. Roggisch <deets at nospam.web.de> wrote:
> nik600 wrote:
>
>> Both win and linux if possible i don't have preference for gui. Thanks
>
> Qt4 now contains the WebKit html widget.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>
Thanks but the problem about using something different between IE of
FF is that the css and javascript management is different.

Web developers usually check only 3 browser
IE
FF
Opera

I know that using an external engine limits the portability of the
solutions, but i need something that works exaclty as the browser.


-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From tjreedy at udel.edu  Sun May 25 21:34:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 21:34:50 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <g1d43p$g2j$1@ger.gmane.org>


"Joe P. Cool" <joe.p.cool at googlemail.com> wrote in message 
news:09847cfc-eaec-4adc-8cbf-1e2ebbf940c4 at m44g2000hsc.googlegroups.com...
| Actually it is very useful to be able to  distinguish
| between inside and outside.

Which Python allows one to do.

| This is obvious for real world things e.g. your
| TV. Nobody likes to open the rear cover to switch the channel.

The original issue was that users might open the case to do something 
unplanned and that they would come to depend on and clamor for the 
maintenance of internal details that the manufacturer wants to change.  But 
in the real world, most customers know and accept that custom alterations 
and extensions of a product my be model specific.  Some things I buy even 
have a disclaimer that user-visible details might be different from what 
the instructions say, and only guarantee that the functionality will be as 
good or better than specified.

[...]
| Please don't sell a missing feature as a philosophy.

I won't if you don't claim that a feature is missing because you don't like 
its implementation.  To most of us, replacing the nearly never used '__' 
with a keyword would be a auful change.

| Please don't tell me that encapsulation does not mean "enforced 
restriction".

There are obviously degrees of enforced restriction.  Take your TV example. 
Most users will respect a 'do not open' request by the manufacturer 
(Python's '_'.).  But some will unscrew anyway.  So some makers use 
fasteners that are resistent to opening without specialized tools from 
specialized sources -- or perhaps specialized knowledge (Python's '__'). 
(This is very frustrating if one needs to open such a system.)  Or some 
mark the screws so they can detect and punish entry.  At least one (Apple) 
has intentionally altered internals to punish entry and alteration.  Or 
there is the 'embed in epoxy' method.

If you want something equivalent to epoxy embedding, design it, implement 
it, and share it (if you want).  Perhaps one could make an Opaque extension 
class, perhaps even usable as a mixin class rather than as a single-base 
class.

Terry Jan Reedy





From pecora at anvil.nrl.navy.mil  Fri May  9 11:14:34 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 May 2008 11:14:34 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.815.1210287883.12834.python-list@python.org>
Message-ID: <pecora-28D003.11143409052008@ra.nrl.navy.mil>

In article <mailman.815.1210287883.12834.python-list at python.org>,
 Michael Torrie <torriem at gmail.com> wrote:

> wxPythoner at gmail.com wrote:
> > Have a look at this:
> > 
> >>>> -123**0
> > -1
> > 
> > 
> > The result is not correct, because every number (positive or negative)
> > raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> No python is correct.  you're expression parses this way, when converted
> to a lisp-ish prefix expression:
> 
> (- (123 ** 0 ))

Yeah, it's just the standard parser.  For other situations Python does 
fine.  E.g.

In [1]: x=-1

In [2]: x**0
Out[2]: 1

-- 
-- Lou Pecora


From mishok13 at gmail.com  Thu May  8 03:56:50 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Thu, 8 May 2008 10:56:50 +0300
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
References: <48215537.100@promsoft.ru>
	<mailman.695.1210147319.12834.python-list@python.org>
	<3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
Message-ID: <192840a00805080056g25dd98cu9b01545235f402c@mail.gmail.com>

2008/5/8 Tim Roberts <timr at probo.com>:
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>
>  >2008/5/7 Alexandr N Zamaraev <tonal at promsoft.ru>:
>
> >> Subj is bag?
>  >>
>  >>  Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
>  >> (Intel)] on win32
>  >>  Type "help", "copyright", "credits" or "license" for more information.
>  >>  >>> from datetime import datetime
>  >>  >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
>  >>  '2008_05_07 12_30_22.csv'
>  >>  >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
>  >>  Traceback (most recent call last):
>  >>   File "<stdin>", line 1, in <module>
>  >>  TypeError: strftime() argument 1 must be str, not unicode
>  >
>
> >Unicode and str objects are not the same. Why do you think that this
>  >is a bug?
>
>  I think that's a perfectly reasonable thing to expect.  At the risk of
>  over-generalization, there is no good reason why, by this point in time,
>  all of the standard library routines that accept strings shouldn't also
>  accept Unicode strings.
>
>  It's the duck typing principle.  Unicode strings look, walk, and talk like
>  regular strings.  An error like this is not intuitive.

On a second thought -- both of you (you and Alexander) are right. I
changed mind and posted a bug on Roundup already (bug #2782).

>  --
>  Tim Roberts, timr at probo.com
>  Providenza & Boekelheide, Inc.
>
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From fetchinson at googlemail.com  Tue May 13 13:59:35 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Tue, 13 May 2008 10:59:35 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
	<87d4nqgllh.fsf@physik.rwth-aachen.de>
	<5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>
Message-ID: <fbe2e2100805131059x5569e51pd45de2effd67b60@mail.gmail.com>

Hi Dave,

Flaming Thunder looks interesting especially the fact that you claim to have
maintainable multi-platform assembler code. Does this mean that if in the
next 3 years a new processor architecture comes out you will be able to port
your assembler code easily? Can you give us more detail about this? I also
have some assembler code which works on 32-bit x86 architectures but porting
that to 64-bit is already non-trivial, I mean has to be done by hand. Unless
you have an automatic tool to do these things.

About pricing: what led the company to pick this particular business model?
Have you considered other options? Like releasing the source as GPL or
something similar and offering technical support for money, training
developers or selling of support material like documentation, etc?

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown
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From bignose+hates-spam at benfinney.id.au  Sun May 11 18:44:19 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 08:44:19 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net>
Message-ID: <87mymw8nr0.fsf@benfinney.id.au>

John Salerno <johnjsal at gmailNOSPAM.com> writes:

> num = 33
> 
> for x in xrange(10):
>     print num += 1

Which is better done by 'num += 10'.

Can you come up with an example that isn't trivially replaced with
clearer code? That might make it clearer what your concern is.

> The [above] example [...] is simply doing something 10 times, and
> what it's doing has nothing to do with 'x' or xrange. So it seems
> like an abuse of the for loop.

In such cases, the name 'dummy' is conventionally bound to the items
from the iterator, for clarity of purpose::

    for dummy in range(10):
        # do stuff that makes no reference to 'dummy'

Also note that 'range' will return an iterator (not a list) in Python
3.0, and 'xrange' is removed since it's then obsolete
<URL:http://www.python.org/dev/peps/pep-3100/#built-in-namespace>.

-- 
 \          ?Isn?t it enough to see that a garden is beautiful without |
  `\      having to believe that there are fairies at the bottom of it |
_o__)                                             too?? ?Douglas Adams |
Ben Finney


From stef.mientki at gmail.com  Sat May 10 19:18:29 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sun, 11 May 2008 01:18:29 +0200
Subject: how to reference my own module ?
In-Reply-To: <g058jk$jcb$1@ger.gmane.org>
References: <4825F6BB.9090707@gmail.com> <g058jk$jcb$1@ger.gmane.org>
Message-ID: <48262D45.7000803@gmail.com>

Terry Reedy wrote:
> "Stef Mientki" <stef.mientki at gmail.com> wrote in message 
> news:4825F6BB.9090707 at gmail.com...
> | hello,
> |
> | I've a library that I import as
> |
> |    import ppygui.api as gui
> |
> | the reason for this construct is that I've to use different libraries
> | for different platforms.
> |
> | Now I like to write some examples in the library (activated by if
> | __name__ == '__main__' :)
> | and I would that these examples can be used in the user program just by
> | copy / paste.
> |
> | For calling a function / class in the user program I've to write:
> |
> |    sizer = gui.VBox ()
> |
> | So also write exactly the same sentence in the library examples,
> | but  "gui" is not recognized
> |
> | Any ideas how I can realize the above ?
>
> Put the import statement in the example so 'gui' *is* recognized ;-)
>
> If I understand what you meant ...
> xploro/test/begin.py
> -----------------------------
> def start():
>     print('hello')
>
> if __name__ == '__main__':
>     import xploro.test.begin as etb
>     etb.start()
> ----------------------------
> prints 'hello'|
>
> Import is a name-binding statement that also creates a module when it does 
> not exist already.  Modules can be bound to multiple names just like any 
> other object.
>   
Thanks Terry,
works like a charm,
why is the obvious often so difficult overlooked ;-)

cheers,
Stef
> Terry Jan Reedy
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From ohad911 at gmail.com  Wed May 21 10:45:21 2008
From: ohad911 at gmail.com (ohad frand)
Date: Wed, 21 May 2008 17:45:21 +0300
Subject: problem with import / namespace
In-Reply-To: <483427BF.6030805@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
Message-ID: <b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>

Hi
Thanks for the answer.
I probably didnt write the problem accurately but it is not as you
described.
(i already read before the section that you pointed and it didnt help me)
the problem is that i dont want to import a file from different directory
but only from the same directory.
\\1\tmp2.py imports \\1\tmp1.py
\\2\tmp2.py imports \\2\tmp2.py
but when i execute the following script in the interpreter i get that the
second tmp2.py file imports not the file from the same directory but the
file that was already imported by the first executed tmp2.py file.
the shell script is:
>>> import os
>>> os.chdir("c:\\1")
>>> execfile("tmp2.py") <- here the executaion is OK
>>> os.chdir("c:\\2")
>>> execfile("tmp2.py") <- here the execution is not ok because tmp2.py file
imports the tmp1.py file from c:\\1 which is not OK

in between those two execfile commands i tried to do a lot of things but
every time python imported the incorrect file for the second execution. (i
am not building a package and those names are just examples for the problem,
i am not really using 1 and 2 names as dirs)

I hope that this time i am more understood

Thanks again
Ohad


On Wed, May 21, 2008 at 4:46 PM, Laszlo Nagy <gandalf at shopzeus.com> wrote:

> ohad frand wrote:
>
>> Hi
>> I have a problem that the solution to it must be very simple but i couldnt
>> fint it's answer in the internet so far (i searched for couple of days)
>> the problme is as follows:
>>
>> i have two directories e.g. "\\1" and "\\2"
>> in each directory i have two files with the same names e.g. "tmp1.py" and
>> "tmp2.py"
>>
>
> So this is what you have:
>
> /1/tmp1.py
> /1/tmp2.py
> /2/tmp1.py
> /2/tmp2.py
>
>  each tmp2.py file imports tmp1 from its same directory (import tmp1) -
>> thats the problem
>> if i execute one file (\\1\tmp2.py) than the execution is ok
>> but when i try after that to execute the second file (\\2\tmp2.py) than
>> the tmp1 file from the wrong directory ( - directory 1 in this case) is
>> imported instead.
>>
>
> When you try to import a module, python starts to search for it. The was it
> does the search is very well defined. It mostly depends on the current
> directory and sys.path. You can read more about this here:
>
> http://docs.python.org/tut/node8.html#searchPath
>
> This is very basic thing - you should read and go through the tutorial
> before asking questions like this. :-)
>
>  i tried many things to try to solve it, i removed the previous path from
>> sys.path and added the new one, i tried to change current working directory
>> with os.chdir()
>> I tried to delete from locals and from globals the name tmp1 before
>> running the second file but nothing worked.
>> please help
>>
> The problem is still not well defined. Python works as expected and
> documented, but apparently you do not know how to import 1/tmp2.py from
> 2/tmp1.py.  There are several ways to do it, and we cannot tell which one is
> correct. It depends on what are these modules for.
>
> Here are the solution that you would use (most likely) as a beginner:
>
>
> #1 first, rename your "1" and "2" directories to "one" and "two". If you
> are creating a package with modules, then you have to define the package's
> name with its directory. Since identifiers cannot begin with digits in
> Python, you need to use an identifier-like name for your subdirs. It is a
> good idea anyway. A package name called "1" would tell nothing about what it
> does?
> #2 place your main application in /app/app.py
> #3 create /app/one/__init__.py and /app/two/__init__.py files (they can be
> empty)
> - inside your app.py file either make sure that the current dir is /app, or
> insert /app in the first place in sys.path
>
>
> Then for example, inside two/tmp1.py you can do this:
>
>
> import one.tmp1
> import one.tmp2
> import two.tmp1
>
> one.tmp1.somefunc()
> two.tmp1.somefunc()
>
>
> You got the idea.
>
>   Laszlo
>
>
>
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From castironpi at gmail.com  Thu May  8 01:27:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 22:27:43 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
Message-ID: <b760601e-2e02-4dbe-9f05-7de3f305ffba@34g2000hsh.googlegroups.com>

On May 7, 11:02?pm, krustymon... at gmail.com wrote:
> I'm wondering if anyone can help with a workaround for a problem I
> currently have. ?I'm trying to set up a prefork tcp server.
> Specifically, I'm setting up a server that forks children and has them
> listen on pipes created with os.pipe(). ?The parent process for the
> group starts an inet:tcp server on a given port. ?In the parent, after
> a "socket.accept()", I'm trying to pickle the connection object to
> send over an IPC pipe (as stated previously), but I get the following
> error:
>
> File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> ? ? raise TypeError("a class that defines __slots__ without "
> TypeError: a class that defines __slots__ without defining
> __getstate__ cannot be pickled
>
> Does anyone know of a workaround for this? ?Maybe my approach to this
> is wrong? ?Any help would be appreciated.
>
> Jay

The group currently holds that pickling socket objects is non-optimal
to the ends of making money.  We can tell you good ways to accomplish
what you set out to do all the same.  I find it educational; that's
fine in my book.  Part of the resistence comes from a resistence to
monarchy.  The bottleneck is the starting of a second Python process.

There are a number of objects which can't be pickled, though.  If you
can objectively prioritize the next step in pickling sockets, you may
find out sooner when it will come in to Python.  But that's the hard
part; speaker recommends against.

We accept your idea is to get a process around the socket barrier.
Can you close the server in Part N, hear the connection in Part N+1,
spawn a new server in N+2, and handle the first one in N+3?  Is it
suitable to your minds?


From castironpi at gmail.com  Mon May  5 23:14:05 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 20:14:05 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>
Message-ID: <3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>

On May 5, 6:40?pm, castiro... at gmail.com wrote:
> On May 5, 1:26?pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
>
>
>
>
>
> > Hi there. ?Maybe a little more context would
> > help us figure out what you want here...
>
> > On May 5, 1:28 pm, castiro... at gmail.com wrote:
>
> > > Is multimap just a syntax-checked dictionary of mutable sequences?
>
> > I think the equivalent of a multimap can be
> > implemented several different ways, depending on
> > what you need:
>
> > ? for
> > ? ? ? ?1 maps to 2,3
> > ? ? ? ?5 maps to 7
> > ? - dictionary mapping to lists
> > ? ? ? ?{ 1:[2,3], 5:[7] } # supports unhashable values
> > ? - dictionary mapping to dictionary
> > ? ? ? ?{ 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
> > and dense data
> > ? - dictionary with tuple/pairs as keys
> > ? ? ? ?{ (1,2):None, (1,3):None, (4,7):None } # streamlined for
> > existence testing
>
> It's possible there are four different kinds of multimaps.
>
> objects map to set
> objects map to frozenset
> objects map to sequence
> frozenset maps to object
>
> What does the STL use? ?I am interested in a serialization that
> changes certain bits and appends more. ?Prior discussion brought me to
> multimap, but that quotient stifled it.
>
> > If you search usenet (google groups) for multimap
> > you will find some nice discussions by Alex Martelli and others.
>
> > > Is def( a ): a[:]= [x] a trick or part of the language? ?It looks
> > > pretty sharp in variable-width.
>
> > You lost me here.
>
> I was referring to a couple of threads from the Winter [cit. off'd.]
> that never really gelled.
>
> Modifying parameters is crucial to a number of control flow structures
> (program divisions). ?Examples could come handy.

I am questioning if value-succession is a sufficient protocol to side
effects.

Fibonacci numbers are formulaic.  Month names are tabular.  Factorials
are recursive.  Hold there is no use for a factorial generator, i.e.
no factorials in business.  Things the real world generates are
network requests of a station, successive graphics (though so far only
for games*), month names (and other units of time), produce, and
dollar values in the form of prices.

* Information display isn't the top of the market.

Simple matching that's hard to explain in a formal language can yield
scheduling, value, opinion.  It is not clear that art or architecture
have tender/vital value.  I.e., it's possible that the only value of
computers is automation in a system that is already pretty fine at
food, utilities, and walls.

If recursive generators are really useless (erect wall might not be),
there's no jobs in looking in to it.  Which brings me to persistence
of generators juxtaposed to merely persistence of functions.
Sequences could map into a database pretty easily, in a line or less,
if deque/set/dict (i.e. non-sequential) don't modify easily on disk,
what's the function that allocates in a database?

> >>> def a( x ): x[:]= [x[0]+ 1]
> ...
> >>> b= [2]
> >>> a(b)
> >>> b
>
> [3]



From cjw at ncf.ca  Thu May  8 08:55:36 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 08:55:36 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
Message-ID: <fvut8a$b67$1@theodyn.ncf.ca>


The readme.txt has:

All you need to do is open the workspace 
"pcbuild.sln" in Visual Studio,
select the desired combination of 
configuration and platform and eventually
build the solution. Unless you are going 
to debug a problem in the core or
you are going to create an optimized 
build you want to select "Release" as
configuration.

Unfortunately, the Express Edition 
(Free) doesn't handle "solution" files.

Installed Edition: VC Express

Microsoft Visual C++ 2008 
91909-152-0000052-60812
Microsoft Visual C++ 2008


Does anyone have any advice for a person 
who has limited C++ experience and none 
with the Visual C++ please?

Colin W.


From unknown_hero007 at hotmail.com  Fri May  9 08:36:59 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 05:36:59 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com>
Message-ID: <3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com>

Ah, never mind, got it to work. Here's the code now. I hope I won't
run into another problems later :D


<code snippet>
#Goes through all keys and subkeys in the selected hive (defined as
root) and replaces the value 'old' with the value 'new'
#
#IMPORTANT! You should always back up the registry before attempting
to modify it.
#The author of this script CANNOT BE HELD RESPONSIVE for any damage
caused by running this script.
#
#To customize the script to your liking, you can alter the values old,
new, root.
#
#old and new can be any string value
#root has to be one of the following:
#
# _winreg.HKEY_LOCAL_MACHINE
# _winreg.HKEY_CURRENT_USER
# _winreg.HKEY_CLASSES_ROOT
# _winreg.HKEY_USERS
# _winreg.HKEY_CURRENT_CONFIG

import _winreg #For accessing windows registry, included in Python
2.0.
import sys #For reading arguments (command line), included in every
Python release.

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
}


class RegKey:

  def __init__ (self, name, key):
     self.name = name
     self.key = key

  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.

  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  try:
    if "\\" not in top: top += "\\"
    root, subkey = top.split ("\\", 1)
#    print "KEY:", root + "\\" + subkey
    key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ |
_winreg.KEY_SET_VALUE)
    subkeys = []
    i = 0
    while True:
      try:
        subkeys.append (_winreg.EnumKey (key, i))
        i += 1
      except EnvironmentError:
        break

    values = []
    i = 0
    while True:
      try:
        values.append (_winreg.EnumValue (key, i))
        i += 1
      except EnvironmentError:
        break

    yield RegKey (top, key), subkeys, values

    for subkey in subkeys:
      for result in walk (top + "\\" + subkey):
        yield result

  except WindowsError:
#    print 'Could not open key', root + "\\" + subkey + ", access
denied!\n"
    pass

  except:
    print 'Other error!'


def main(start, startHandle, old, new):
  basickeys = []
  i = 0
  while True:
    try:
      basickeys.append (_winreg.EnumKey (startHandle, i))
      i += 1
    except EnvironmentError:
#      print i, 'subkeys found!'
      break

  for x in range(len(basickeys)):
    for key, subkey_names, values in walk (start + "\\" +
basickeys[x]):
#      print key
      for (name, data, type) in values:
#        print "  ", name, "=>", data
        if type == _winreg.REG_SZ:
          Character = 0
          Correct = 0
          FoundStart = FoundEnd = 0
          Found = False
          for y in range(len(data)):
            try:
              if Character < len(old):
         #       print old[Character], data[y]
                if old[Character] in data[y]:
                  Character = Character + 1
                  Correct = Correct + 1
            except:
              pass
          if Correct is len(old):
#            print 'Debug!'
            Replace = ""
            Character = 0
            for y in range(len(data)):
              if not Found:
                if old[0] in data[y]:
                  FoundStart = int(y)
                  FoundEnd = FoundStart + len(old)
                  Found = True
#            for y in range(FoundStart):
#              Replace = Replace + data[y]

            for y in range(len(new)):
              Replace = Replace + new[y]

#            for y in range(FoundEnd, len(data)):
#              Replace = Replace + data[y]
            Found = True
          if Found:
#            print "OLD:", old, "will be replaced with:", Replace
            _winreg.SetValueEx (key.key, name, 0, type, data.replace
(old, Replace))


def help():
  #Show help
  print 'USAGE: Registry.py [HIVE] [OLD] [NEW]'
  print '  HIVE: The root key in registry you want to go through.'
  print '    HKEY_CLASSES_ROOT'
  print '    HKEY_CURRENT_USER'
  print '    HKEY_LOCAL_MACHINE'
  print '    HKEY_USERS'
  print '    HKEY_CURRENT_CONFIG'
  print ''
  print '  OLD:  The value to search for.'
  print '    Wrap multiword strings with \"\".'
  print ''
  print '  NEW:  The value which will replace OLD.'
  print '    Wrap multiword strings with \"\".'

#Check for arguments
#HIVE, old, new

while True:
  #Check if invalid number of arguments are given
  if len(sys.argv) is 1:
    help()
    break

#  for x in range(len(sys.argv)):
#    print 'sys.argv[' + str(x) + ']:', sys.argv[x]

  #Check if hive is first
  if sys.argv[1].upper() in ('HKEY_CURRENT_USER',
                             'HKEY_LOCAL_MACHINE',
                             'HKEY_CLASSES_ROOT',
                             'HKEY_USERS',
                             'HKEY_CURRENT_CONFIG'):

    start = sys.argv[1].upper()

  else:
    help()
    break

  #Check that not only one argument is given (at least two required,
preferably three)
  if len(sys.argv) is 2:
    help()
    break

  old = sys.argv[2]

  if len(sys.argv) is 4:
    new = sys.argv[3]

  else:
    help()
    break


  if start in ('HKEY_CLASSES_ROOT'):
    startHandle = _winreg.HKEY_CLASSES_ROOT

  elif start in ('HKEY_CURRENT_USER'):
    startHandle = _winreg.HKEY_CURRENT_USER

  elif start in ('HKEY_LOCAL_MACHINE'):
    startHandle = _winreg.HKEY_LOCAL_MACHINE

  elif start in ('HKEY_USERS'):
    startHandle = _winreg.HKEY_USERS

  elif start in ('HKEY_CURRENT_CONFIG'):
    startHandle = _winreg.HKEY_CURRENT_CONFIG

  else:
    help()
    break

  main(start, startHandle, old, new)
  break
</code>


From nyamatongwe+thunder at gmail.com  Mon May 26 05:12:05 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 26 May 2008 09:12:05 GMT
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <F9v_j.4725$IK1.3486@news-server.bigpond.net.au>

Russ P.:
> The encapsulation wouldn't be as
> airtight as "private" in C++, so clients could still get access ...

    C++ private is not airtight as you have access to pointer arithmetic 
as well as
#define private public

    Neil


From skanemupp at yahoo.se  Wed May  7 17:49:24 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:49:24 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<81addfb5-254f-4a2b-a2bc-044592cee07f@p25g2000hsf.googlegroups.com>
Message-ID: <080475c4-f5b3-4445-8c64-f99f82b87aac@b64g2000hsa.googlegroups.com>

On 7 Maj, 23:47, globalrev <skanem... at yahoo.se> wrote:
> and what si the diffrence here:
>
> g = lambda x=5:x*x
> g = lambda x:x*x
>
> the first was a mistake to write but it worked
> and the x=5 seems to be completely ignored. why? it has no effect at
> all?

ah wait now i see it has a default kind of then. g() returns 25 while
g(8) returns 64.


From arnodel at googlemail.com  Wed May 28 16:48:54 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 21:48:54 +0100
Subject: Writing a function from within Python
References: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>
Message-ID: <m27ide40jt.fsf@googlemail.com>

Aaron Scott <aaron.hildebrandt at gmail.com> writes:

> Is it possible to change the content of a function after the function
> has been created? For instance, say I make a class:
>
> 	class MyClass:
> 		def ClassFunction(self):
> 			return 1
>
> And I create an object:
>
> 	MyObject = MyClass()
>
> Is there any way to change the content of the function, a la pseudo-
> code:
>
> 	MyObject.ClassFunction = "return 2"

Yes there is:

>>> class Foo(object):
...    def __init__(self, x):
...        self.x = x
...    def bar(self):
...        return self.x
... 
>>> foo = Foo('spam')
>>> foo.bar()
'spam'
>>> from types import MethodType
>>> def newbar(self):
...     return self.x + ', yummy!'
... 
>>> foo.bar = MethodType(newbar, foo)
>>> foo.bar()
'spam, yummy!'


HTH

-- 
Arnaud


From castironpi at gmail.com  Tue May 20 09:27:25 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:27:25 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g0uec3$cai$1@news.al.sw.ericsson.se>
Message-ID: <d571756f-4102-4430-bb13-579e907a0639@d77g2000hsb.googlegroups.com>

On May 20, 6:57?am, Wolfgang Grafen <wolfgang.gra... at ericsson.com>
wrote:
> globalrev schrieb:
>
>
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> > ? ? if i%3 == 0 and i%5 != 0:
> > ? ? ? ? print "Fizz"
> > ? ? elif i%5 == 0 and i%3 != 0:
> > ? ? ? ? print "Buzz"
> > ? ? elif i%5 == 0 and i%3 == 0:
> > ? ? ? ? print "FizzBuzz"
> > ? ? else:
> > ? ? ? ? print i
>
> > is there a better way than my solution? is mine ok?
>
> Your example is comprehensive compared to many other suggestions which
> is an advantage IMO. I minimised it further
>
> for i in range(start, stop, step):
> ? ? ?if not i%15:
> ? ? ? ? ?print "FizzBuzz"
> ? ? ?elif not i%3:
> ? ? ? ? ?print "Fizz"
> ? ? ?elif not i%5:
> ? ? ? ? ?print "Buzz"
> ? ? ?else:
> ? ? ? ? ?print i
>
> Best regards
>
> Wolfgang- Hide quoted text -
>
> - Show quoted text -

This one eliminates the modulo operation.

dyn= list( xrange( 1, 101 ) )
for i in xrange( 1, len( dyn ), 3 ):
	dyn[ i ]= ''
for i in xrange( 1, len( dyn ), 5 ):
	dyn[ i ]= ''
for i in xrange( 1, len( dyn ), 3 ):
	dyn[ i ]+= 'Fizz'
for i in xrange( 1, len( dyn ), 5 ):
	dyn[ i ]+= 'Buzz'
for d in dyn:
	print d

Can we compare?


From nyamatongwe+thunder at gmail.com  Sun May 11 04:22:20 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 11 May 2008 08:22:20 GMT
Subject: Any other UI kits with text widget similar to that in Tk?
In-Reply-To: <mailman.915.1210448402.12834.python-list@python.org>
References: <mailman.915.1210448402.12834.python-list@python.org>
Message-ID: <01yVj.94$IK1.36@news-server.bigpond.net.au>

Kenneth McDonald:
> I'm wondering if any of the other GUI kits have a text widget that is 
> similar in power to the one in Tk.

    The main text widget in GTK+ was modeled after Tk but I don't know 
how well it succeeded in implementing this.

    Neil


From a_jtim at bellsouth.net  Tue May 13 07:25:59 2008
From: a_jtim at bellsouth.net (Tim Arnold)
Date: Tue, 13 May 2008 04:25:59 -0700 (PDT)
Subject: using PIL for good screenshots
References: <g0adou$1us$1@foggy.unx.sas.com>
	<mailman.1011.1210637478.12834.python-list@python.org>
Message-ID: <e606febc-aa25-45a0-971d-47fe75a93432@a23g2000hsc.googlegroups.com>

On May 12, 8:11?pm, pyt... at bdurham.com wrote:
> Tim,
>
> Sounds like an interesting project.
>
> Have you considered using SnagIt to produce your screenshots?www.TechSmith.com/SnagIt
>
> Malcolm

Thanks for the interest on this, but I don't control what the writers
use to get the screenshot. They give me a 8-bit png screenshots
(sometimes 24-bit) captured at 96 dpi. The part I can control comes
after that--I need a workflow for getting the screenshot into print,
looking as good as possible.

thanks,
--Tim Arnold



From paul.hankin at gmail.com  Fri May  9 11:09:58 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 9 May 2008 08:09:58 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <2bbcd24b-d36d-47dd-a0fa-4d7333e85fef@a23g2000hsc.googlegroups.com>

On May 9, 10:10?am, dannywebs... at googlemail.com wrote:
> Hello all,
>
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo'). ?I need to grab the previous
> iteration if this condition is met. ?I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

Often when you're iterating, 'hacky' code can be lifted out into a
separate generator, keeping the details of the hacks nicely away from
your code. That's true here...

def iterprevious(seq):
    """Generate pairs of (previous element, current element)
    from seq."""
    last = None
    for x in iter(seq):
        yield last, x
        last = x

Then, when you want use it...

for previous, (key, value) in iterprevious(d.iteritems()):
    ... In the loop, previous will either be None if we're on the
first element, otherwise (previous_key, previous_value).

--
Paul Hankin


From pavlovevidence at gmail.com  Sun May 11 21:52:48 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 11 May 2008 18:52:48 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
Message-ID: <f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>

On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> In such cases, the name 'dummy' is conventionally bound to the items
> from the iterator, for clarity of purpose::
>
>     for dummy in range(10):
>         # do stuff that makes no reference to 'dummy'

Is this documented?  I've never heard of this convention.  It's not
PEP 8, and I've never seen consistent usage of any name.  I'd be
interested in knowing where you read that this was a convention, or in
what subcommunities it's a convention in.

I think dummy is a terrible name to use for this, since in no other
usage I can think of does the word "dummy" suggest something isn't
used.  In fact, quite the opposite.  For example, the dummy_threads
module is most definitely used; the word dummy means that it's
stripped down.  Based on that, your usage of the symbol dummy above
would suggest to me that it's a value used in lieu of something else
(such as a calculated value).

In mathematics, a dummy argument another name for the independent
variable of a function (or more accurately, the symbol used to
represent it), which also doesn't match your usage.

If a value isn't used, then I think the most clear name for it is
"unused".


Carl Banks


From szrRE at szromanMO.comVE  Tue May 27 00:52:35 2008
From: szrRE at szromanMO.comVE (szr)
Date: Mon, 26 May 2008 21:52:35 -0700
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
	<358ec7c3-4a25-4591-a705-03446e074b20@25g2000hsx.googlegroups.com>
Message-ID: <g1g42k02miu@news4.newsguy.com>

j.oke wrote:
> On 26 Mag, 01:25, "xah... at gmail.com" <xah... at gmail.com> wrote:
>> For about the past 10 years, ...
>
> Q: How many comp.lang.X trolls does it take to change a light bulb?
>
> A: One, and Superman. One to hold the bulb, and Superman to screw the
> planet.

Are you saying Superman is harming the planet?  :-)

-- 
szr 




From skanemupp at yahoo.se  Fri May  9 19:53:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 16:53:15 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
Message-ID: <ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>

ty. that was the decrypt function. i am slo writing an encrypt
function.

def encrypt(phrase):
    pattern =
re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
    return pattern.sub(r"1\o\1", phrase)

doesnt work though, h becomes 1\\oh.


def encrypt(phrase):
    pattern =
re.compile(r"([bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ])")
    return pattern.sub(r"o\1", phrase)

returns oh.

i want hoh.

i dont quite get it.why cant i delimit pattern with \


From dingo_1980 at yahoo.com  Mon May 12 20:53:51 2008
From: dingo_1980 at yahoo.com (dingo_1980 at yahoo.com)
Date: Mon, 12 May 2008 17:53:51 -0700 (PDT)
Subject: Sparse Matrix Multiplications
Message-ID: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>

I was trying to create a sparse matrix using scipy.sparse (100000 X
100000) with just the first row and first column filled with ones.
Lets call this matrix Asp. This is how I created Asp

from scipy import sparse
Asp = scipy.lil_matrix(100000,100000)
for i in range(100000):
   Asp[i,0] = i
   Asp[0,i] = i
Bsp = (Asp.tocsr())*(Asp.tocsr())

This multiplication to get Bsp is taking a long time (to the order of
over an hour). Is there some other way of storing such huge sparse
matrices and doing their multiplications or is this the most optimal
way?


From code at pizzashack.org  Sun May 18 15:43:54 2008
From: code at pizzashack.org (Derek Martin)
Date: Sun, 18 May 2008 15:43:54 -0400
Subject: python confusion possibly related to pickle
In-Reply-To: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
Message-ID: <20080518194354.GA27968@dragontoe.org>

On Sun, May 18, 2008 at 08:28:34PM +0100, Dennis wrote:
> The problem that's got me annoyed is that after getting said error I
> close the shell window, open a new one, run the python interpreter
> and type "import pickle" and get the error that the script I'd run
> earlier caused. Why is this ?

Well, what's the error?  Sounds like your system could be b0rked (or
at least your python installation)... but depending on the error,
there could be other explanations.  

-- 
Derek D. Martin
http://www.pizzashack.org/
GPG Key ID: 0x81CFE75D

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From usenet-nospam at well-adjusted.de  Thu May 29 16:41:38 2008
From: usenet-nospam at well-adjusted.de (Jochen Schulz)
Date: Thu, 29 May 2008 22:41:38 +0200
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
	<6a4oumF3464loU1@mid.uni-berlin.de>
Message-ID: <slrng3u582.2gr.usenet-nospam@well-adjusted.de>

* Marc 'BlackJack' Rintsch:
> On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:
>> Dennis Lee Bieber, the ghost:
>>
>>> I'd have to wonder why so many recursive calls?
>> 
>> Why not?
> 
> Because of the recursion limit of course.  And function call overhead in
> Python is quite high compared to an iterative approach.

One of my pet projects[1, it's about building and searching trees] made
heavy use of recursion in the beginning.  I rewrote parts of it using
iteration because I hit the recursion limit and suspected a performance
hit as well. To my (mild) surprise, the rewrite didn't perform
significantly better. My benchmarks only showed an improvement of a few
percent in runtime. I didn't measure memory usage, though.

J.

[1] http://well-adjusted.de/mspace.py/
    (Sorry, baerophile, I'll get back to you about this! My SNV working
    copy is currently a mess and I need to clean that up first.)

-- 
I feel yawning hollowness whilst talking to people at parties.
[Agree]   [Disagree]
                 <http://www.slowlydownward.com/NODATA/data_enter2.html>


From srp at ideadevice.com  Wed May 28 22:46:54 2008
From: srp at ideadevice.com (Saju Pillai)
Date: Thu, 29 May 2008 08:16:54 +0530
Subject: Any way to loop through object variables?
In-Reply-To: <483D8614.7000808@islandtraining.com>
References: <483D7A47.3030606@ecs.soton.ac.uk>
	<483D8614.7000808@islandtraining.com>
Message-ID: <7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>


On 28-May-08, at 9:49 PM, Gary Herron wrote:

> Dave Challis wrote:
>> Hi,
>> Just wondering if there's a way to iterate through all variables  
>> which
>> an object has set?
>>
>> Specifically, I'm using the OptionParser module, which returns an
>> options object, containing all command line options as object  
>> variables.
>> I'd like to iterate over these rather than getting at them by name.
>>
>> Cheers,
>> Dave
>
> For this object (and many others), you can get at the attributes  
> with the vars(...) builtin.
> It returns a dictionary of attribute names and values.


Also dir(object) will get you the list of attributes of that object.

-srp

>
>
> Gary Herron
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From gilly.dekel at gmail.com  Sun May  4 13:11:50 2008
From: gilly.dekel at gmail.com (Gilly)
Date: Sun, 4 May 2008 10:11:50 -0700 (PDT)
Subject: Real Time Midi File Playback - Reading and Writing midi at the same 
	time
Message-ID: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>

Hi
I am trying to create an application that uses some form of input to
create a midi file.
I would like for this to be a 'real time' process. In other words, I
want to be able to begin playing the midi file before I finish writing
it, and continue writing as it plays.

I would really appreciate any help possible on this matter.

Thanks!!


From deets at nospam.web.de  Tue May 27 11:24:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 17:24:04 +0200
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <6a2ndjF35q29pU1@mid.uni-berlin.de>

Sverker Nilsson wrote:

> I was talking about Guido van Rossum
> 
> The one who decides, so far when people agree
> 
> But we can make a new fork

Good luck with that. Weren't you the one concerned about changes in Py3K
that forced you to change your memory profiler? Now you want to introduce a
*third* codebase beside python2.x and python3.x? Interesting course of
action.
 
> He is the originator, but now it seems, for me, it is hanging out in
> the air

Why do you think so? Because you don't like Py3K?
 
> So we need some new leadership
> 
> From somebody, somebody like you perhaps. Or me.

Well - be my guest to form your own cult.

Diez


From castironpi at gmail.com  Thu May 15 22:30:48 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:30:48 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
	<37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com>
Message-ID: <e717c110-7544-4028-89c4-b37efdd7d61d@a23g2000hsc.googlegroups.com>

On May 15, 9:27?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > > >> I'm cleaning up some old code, and want to see what orphan
> > > >> functions might be sitting around.
>
> > > >> Is there a static call tree analyzer for python?
>
> > > > How about
> > > >http://pycallgraph.slowchop.com/
>
> > > > ...
> > > > Jay Graves
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > Have you checked to see if PyChecker or pylint can help you?
> > > Apparently they can find unused variables at least, I don't know
> > > whether they do functions or not.
>
> > I think of dynamic programming and dynamic code, but voice. ?Does that
> > mean sing about it?- Hide quoted text -
>
> > - Show quoted text -
>
> I have to write a song. ?Somebody?- Hide quoted text -
>
> - Show quoted text -

Sorry for the frequent posts: I think I have to write a noise about
train cars crossing rail, putting numbers on frequencies, and send
code.  Train whistles are pretty good too.  I believe those are the
ones that start to go on keystrokes.  I'd try to compare differences
between those and bowling pins.  A couple others are coins clinking
and poker chips.  Generally speaking, tapping metals and glass.


From bbxx789_05ss at yahoo.com  Sun May 11 22:27:29 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 19:27:29 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<48275955.4000106@islandtraining.com> 
	<48275A1F.5080606@bc90021.net>
	<mailman.950.1210549839.12834.python-list@python.org>
Message-ID: <d69d9540-ee12-4ba4-8ced-170057bf7690@m73g2000hsh.googlegroups.com>

On May 11, 5:50?pm, Gary Herron <gher... at islandtraining.com> wrote:
> bc90021 wrote:
> > You are a perfect example of exactly what I was talking about, and why
> > the Python community is such a poor one.
>
> I though you were treated quite fairly all things considered. ? (You
> started the personal attacks, the whining about the group, the
> accusations of arrogance, and the refusal to believe we all *knew* the
> error was in your file name calculation and not in Python threads.)
>
> This group is widely acknowledged as one of the more friendly groups
> around, ?and in fact we keep it that way by coming down rather hard on
> those who abuse either the members of the group or the purpose of the
> group.

That is a blantant lie.   This group has well known members that are
some of the biggest jackasses I've ever encountered on the internet.
I've never heard a peep out of anyone criticizing their behavior.  If
I were their employer, and I read some of the stuff they posted, I
would fire them on the spot.


From jzgoda at o2.usun.pl  Fri May 16 10:24:15 2008
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 16 May 2008 16:24:15 +0200
Subject: Variable by label
In-Reply-To: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <g0k5h1$92$1@atlantis.news.neostrada.pl>

rocco.rossi at gmail.com pisze:
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
> 
> foo = some_function("foo")
> 
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.

getattr(object, attrname, default)

-- 
Jarek Zgoda
Skype: jzgoda | GTalk: zgoda at jabber.aster.pl | voice: +48228430101

"We read Knuth so you don't have to." (Tim Peters)


From kyosohma at gmail.com  Fri May  9 10:07:15 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:07:15 -0700 (PDT)
Subject: help needed!
References: <mailman.866.1210341290.12834.python-list@python.org>
Message-ID: <0829ee61-3322-44fd-9404-582d86e70347@r66g2000hsg.googlegroups.com>

On May 9, 8:54?am, drjekil <drjeki... at gmail.com> wrote:
> i have a script which will do a specific task for a file in a folder,now i
> would like to do the same task ?for the all files in that folder(25
> files).how can i do that?
>
> Thanks in advance.
>
> --
> View this message in context:http://www.nabble.com/help-needed%21-tp17148388p17148388.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

Or use the glob module and a loop...

Mike


From workitharder at gmail.com  Thu May 22 19:45:52 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 16:45:52 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<68629786-1cef-4dc5-99d9-4967ebecd10f@r66g2000hsg.googlegroups.com> 
	<4834C05D.6020608@gmail.com>
	<0cada27d-8f5f-482e-9acc-4da032edb27e@f36g2000hsa.googlegroups.com>
	<69kkd1F33ahahU1@mid.uni-berlin.de>
Message-ID: <62ba83ad-ee44-4d5a-bac9-346478effa69@a70g2000hsh.googlegroups.com>

On May 22, 12:07 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 21 May 2008 17:56:38 -0700, bukzor wrote:
> > On May 21, 5:37 pm, Nikhil <mnik... at gmail.com> wrote:
>
> >> if os.path.exists('file'):
> >>         open('file', 'w').close()
>
> >> Right?
>
> > You only want to blank it if it exists? If it doesn't exist you won't
> > create it.
> > The .close() is superlative: since you don't keep the value, it gets
> > deallocated and closed by the destructor.
>
> The language neither guarantees *when* an object will be deallocated nor
> that its destructor is called *at all*.  It's cleaner to explicitly close
> the file.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Good to know.


From aahz at pythoncraft.com  Sat May 24 23:30:16 2008
From: aahz at pythoncraft.com (Aahz)
Date: 24 May 2008 20:30:16 -0700
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <g1amg8$7ce$1@panix3.panix.com>

In article <52ba2118-d095-48a6-8844-2ee4c2ec2be1 at m36g2000hse.googlegroups.com>,
Sh4wn  <luckyluke56 at gmail.com> wrote:
>
>first, python is one of my fav languages, and i'll definitely keep
>developing with it. But, there's 1 one thing what I -really- miss:
>data hiding. I know member vars are private when you prefix them with
>2 underscores, but I hate prefixing my vars, I'd rather add a keyword
>before it.
>
>Python advertises himself as a full OOP language, but why does it miss
>one of the basic principles of OOP? Will it ever be added to python?

Not directly addressing your point except insofar as it appears that
your understanding of OOP may be limited:

"...some experts might say a C++ program is not object-oriented without
inheritance and virtual functions.  As one of the early Smalltalk
implementors myself, I can say they are full of themselves." --zconcept
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From banibrata.dutta at gmail.com  Sun May 11 00:15:26 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Sun, 11 May 2008 09:45:26 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
In-Reply-To: <op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>

Thanks Gabriel & Terry. Those explanations make perfect sense.

What is the recommended way, to find the "compatible" packages that include
.dll's / .pyd's or dependencies that are Python release specific ? For
example, is there a 'yum' or other automatic dependency checking mechanism
which works accross OS's (Windows & Linux), which will allow me to find the
other (s.a. 3rd party) packages, which would work with say Python2.2 ? Is it
a completely manual exercise, where I read the README or Package Notes or
Release Notes, and figure out the required version of package ?


On 5/11/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <
> banibrata.dutta at gmail.com> escribi?:
>
> > given that I already have Python2.5 installed & will install Python2.4,
> will
> > copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
> > i think the answer is "no", but still asking. is it package specific ?
> >
> > does it matter if the packages were egg drops ?
>
> Packages containing only .py modules ("pure" packages) are OK; packages
> using C extensions (.dll, .pyd) have to be rebuilt (or you have to download
> the binaries for the other Python version).
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From mail at timgolden.me.uk  Thu May 29 04:18:19 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 09:18:19 +0100
Subject: How to get all the variables in a python shell
In-Reply-To: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
Message-ID: <483E66CB.1010003@timgolden.me.uk>

lixinyi.23 at gmail.com wrote:
> I'm currently working on a scientific computation software built in
> python.
> What I want to implement is a Matlab style command window <->
> workspace interaction.
> 
> For example, you type 'a=1' in the command window, and you see a list
> item named 'a' in the workspace.
> You double click the icon of the item, and you see its value. You can
> modify the value of the list item,
> 1 -> 100 etc,  after which if you go back to the command window and
> type 'a'  and press enter, you see that
> varable a's value has been changed to 100.
> 
> So my question is : if you have two DOS command windows running under
> WINDOWS OS, how can you make them share the same internal variable
> buffer? Or is there any easier way to implement such kind of
> interaction?

I stronly suggest you look at IPython [1]. To do what I think
you're describing, you'd need to hack or reimplement the interpreter.
And that's what they've done. ISTR that they even have a branch
which is dealing with parallel instances.

TJG

[1] http://ipython.scipy.org/moin/


From deets at nospam.web.de  Wed May 21 05:12:09 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 11:12:09 +0200
Subject: scalable xml
References: <mailman.1415.1211360945.12834.python-list@python.org>
Message-ID: <69i7c8F32ha2iU1@mid.uni-berlin.de>

hyperboreean wrote:

> Hi, I am writing the application server for a three-tier architecture
> and sending the client's response in xml. My question is: is there a way
> to build the xml dom in a more scalable way and faster way than just
> creating every textNode and element for it? I have tons of data to
> transmit and it drives me crazy having to build that dom manually.
> 
> I am not sure if this is a stupid question as I don't know other
> alternatives ... maybe just provide a template xml which I can fill with
> data but that can introduce some pretty ugly bugs in the application.

You should have a look at the ElementTree-package (which also comes
api-compatible as lxml). These allow for a much more pythonic way of
creating XML-trees.

However you might consider using a much more concise format such as json for
transport (if you have control over the client). It reduces the data-amount
to about a tenth or so (of course depending on your xml-dialect), with
considerable gains in processing time. 

And then there in fact are some template languages such as KID and genshi
that might suit you because they enforce proper XML.

Diez


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:31:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:31:29 +0200
Subject: datamining .txt-files, library?
In-Reply-To: <96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com>
Message-ID: <482c4934$0$6041$426a74cc@news.free.fr>

Chris a ?crit :
> On May 15, 2:27 pm, globalrev <skanem... at yahoo.se> wrote:
>> i have a big collection of .txt files that i want to open and parse to
>> extract information.
>>
>> is there a library for this or maybe even built in?
> 
> os.open to open the files

What's wrong with (builtin) open ?



From pataphor at gmail.com  Tue May 20 07:31:58 2008
From: pataphor at gmail.com (pataphor)
Date: Tue, 20 May 2008 13:31:58 +0200
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <20080520133158.3cdab604@hyperspace>

On Sun, 18 May 2008 06:36:28 -0700 (PDT)
Monica Leko <monica.leko at gmail.com> wrote:

> Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> sequence of bytes, than 10 bits again, etc.

Here's something to get you started. No guarantees, but I managed to
write four 10 bit numbers to a file producing 5 bytes, saying hello. I
was just looking for an excuse to use send.

P.

def gen(f):
    L = []
 
    def flush(L):
        L.reverse()
        s = ''.join(map(str,L))
        j = int(s,2)
        f.write(chr(j))
    
    while 1:
        x = yield 
        if x in [0,1]:
            L.append(x)
        else:
            break
        if len(L) == 8:
            flush(L)
            L = []        
    if L:
        while len(L) < 8:
            L.append(0)
        flush(L)
    yield

def tenbits(i):
    for j in range(9,-1,-1):
        yield i >> j & 1

def charbits(s):
    for c in s:
        i = ord(c)
        for j in range(8):
            yield i >> j &1

def byten(L):
    while L:
        yield L[:10]
        L = L[10:]
        
def test():
    f = file('out.dat','w')
    g = gen(f)
    g.send(None)
    for x in [90,611,397,758]:
        for bit in tenbits(x):
            g.send(bit)
    g.send('stop')
    f.close()

def test1():
    bits = list(charbits('hello'))
    L = []
    for x in byten(bits):
        L.append(int(''.join(map(str,x)),2))
    print L
    
if __name__=='__main__':
    test()


From mimi.vx at gmail.com  Sun May 11 07:02:00 2008
From: mimi.vx at gmail.com (mimi.vx)
Date: Sun, 11 May 2008 04:02:00 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
	<7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>
Message-ID: <3fdd2ec3-cfba-41a9-90d4-c75ff4fb5b82@m3g2000hsc.googlegroups.com>

On May 11, 12:05 pm, alefajnie <devp... at gmail.com> wrote:
> > try arr[2][3] instead.
>
> > basically your version is trying to index an array with a tuple argument (2,3).
>
> > --irmen
>
> oh, you're right.
>
> btw, is any simple way to create multi-dimension array ?
> any built-in function ?

test numpy from scipy package :)
on www.scipy.org


From lists at cheimes.de  Thu May  8 20:08:33 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 02:08:33 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <200805081914.06459.kyrie@uh.cu>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
Message-ID: <48239601.1070200@cheimes.de>

Luis Zarrabeitia schrieb:
>>>> 0**0
> 1
> 
> That 0^0 should be a nan or exception, I guess, but not 1.

No, that's correct for floats. Read the wikipedia article or the C99
standard for more information.

Christian



From bruno.desthuilliers at gmail.com  Wed May  7 17:51:17 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 14:51:17 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com>

On 7 mai, 18:39, umpsu... at gmail.com wrote:
> Hello,
>
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..
>
> def valsort(x):
>         res = []
>         for key, value in x.items():
>                 res.append((value, key))
>         return res
>
> def mostfreq(strng):
>         dic = {}
>         for letter in strng:
>                 if letter not in dic:
>                         dic.setdefault(letter, 1)

You don't need dict.setdefault here - you could more simply use:
                           dic[letter] = 0
>                 else:
>                         dic[letter] += 1
>         newd = dic.items()
>         getvals = valsort(newd)

There's an error here, see below...

>         getvals.sort()
>         length = len(getvals)
>         return getvals[length - 3 : length]

This is a very convoluted way to get the last (most used) 3 pairs. The
shortest way is:
  return getvals[-3:]


Now... Did you actually test your code ?-)

mostfreq("abbcccddddeeeeeffffff")

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/tmp/python-1048583f.py", line 15, in mostfreq
  File "/usr/tmp/python-1048583f.py", line 3, in valsort
AttributeError: 'list' object has no attribute 'items'

Hint : you're passing valsort a list of pairs when it expects a
dict...

I don't see the point of the valsort function that  - besides it
doesn't sort anything (I can only second Arnaud about naming) -  seems
like an arbitrary extraction of a piece of code for no obvious reason,
and could be expressed in a simple single line:
  getvals = [(v, k) for k, v in dic.items()]

While we're at it, returning only the 3 most frequent items seems a
bit arbitrary too - you could either return the whole thing, or at
least let the user decide how many items he wants.

And finally, I'd personnally hope such a function to return a list of
(letter, frequency) and not a list of (frequency, letter).

Here's a (Python 2.5.x only) possible implementation:

from collections import defaultdict

def get_letters_frequency(source):
    letters_count = defaultdict(int)
    for letter in source:
        letters_count[letter] += 1
    sorted_count = sorted(
       ((freq, letter) for letter, freq in letters_count.iteritems()),
        reverse=True
        )
    return [(letter, freq) for freq, letter in sorted_count]

get_letters_frequency("abbcccddddeeeeeffffff")
=> [('f', 6), ('e', 5), ('d', 4), ('c', 3), ('b', 2), ('a', 1)]

# and if you only want the top 3:
get_letters_frequency("abbcccddddeeeeeffffff")[0:3]
=> [('f', 6), ('e', 5), ('d', 4)]

HTH


From tjreedy at udel.edu  Sun May 11 21:36:39 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 21:36:39 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
Message-ID: <g086v5$eml$1@ger.gmane.org>


"Tim Roberts" <timr at probo.com> wrote in message 
news:hkse24lhna7fp26tcfv5literfaded6nov at 4ax.com...
| wxPythoner at gmail.com wrote:
| >
| >I am stunned that this simple misunderstanding of mine ended in a
| >mathematical clash of a sort. :)  You guys really blew me away wih
| >your mathematical knowledge. And also the 0**0 is a thing I've never
| >thought about trying, until now that is. If the mathematical rule is
| >that EVERYTHING raised to the power of 0 is 1, then we should accept
| >that, even in the case of 0**0. This is just the way it is.
|
| Sure, but it's ALSO the mathematical rule that 0 raised to any power is 
0.

That may be some people's (partial) rule but not everyone's.
There is only agreement on 0 to a positive power.

| Thus, there are multiple solutions to this problem, meaning that there is
| NO solution to the problem.

Only for some people.
a**b := reduce(mul, [a]*b, 1) for all counts a and b is a simple, uniform, 
and useful rule.
Do you have in mind any situations in which it is advantageous to have 0**0 
undefined?

tjr





From mattheww at chiark.greenend.org.uk  Sat May 24 14:22:32 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 24 May 2008 19:22:32 +0100 (BST)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<C3q*E9Bds@news.chiark.greenend.org.uk>
	<2auf34dc59ajcjfq7f3fl0366eukfd98d5@4ax.com>
Message-ID: <Gbv*6CHds@news.chiark.greenend.org.uk>

David C. Ullrich <dullrich at sprynet.com> wrote:

> Matthew Woodcraft <mattheww at chiark.greenend.org.uk> wrote:
>> For example, if you were writing the 'logic' for a chess program you
>> might choose a way of modelling the board that can't represent a
>> position with more than one black king. And then when you got round
>> to doing the GUI you might find out that your users would like to be
>> able to have this temporarily when setting up a position.

> What you say may be true, but this doesn't seem to me like a good
> example. Not that I see _why_ the player would want to have two kings
> temporarily, but if so I wouldn't have the view report this state to
> the model, I'd have the view wait until the player had decided on the
> final configuration betore saying anything to the model. The model
> should only deal with legal positions.


Then you end up implementing a second model of the board state in the UI
layer. And if it turns out that you want to support things like 'save
current position' and 'clone current position to a new window' during
setup, you might well find yourself putting so much logic in the UI
layer that some of what you already wrote in the 'logic' layer ends up
unused.

As for why you might want illegal positions during setup, imagine a UI
where you can click on a square repeatedly and it cycles through the
possible pieces (dunno whether this would be good in practice, but I do
know that guessing whether a UI is good without trying it is rather
unreliable).

-M-


From gherron at islandtraining.com  Wed May 28 01:54:59 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 22:54:59 -0700
Subject: multi dimensional dictionary
In-Reply-To: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
Message-ID: <483CF3B3.3080805@islandtraining.com>

Alok Kumar wrote:
> Dear All,
>
> I am using dictionary for filling my xpath parsed data.
>
> I wanted to use in the following manner.
>
> mydict[index] ["key1"] ["key2"]    #Can someone help me with right 
> declaration.
>
> So that I can fill my XML xpath parsed data
>  
> mydict[0] ["person"] ["setTime"] = "12:09:30"
> mydict[0] ["person"] ["clrTime"] = "22:09:30"


That kind of thing can be done, but there's a better way perhaps:

Create keys for a single level dictionary which are tuples composed of 
the sequence of keys you would have used in your multidimensional 
dictionary.

mydict[(0,"person","setTime")] = "12:09:30"
mydict[(0,"person","clrTime")] = "22:09:30"

Would that work for you?

Gary Herron


>
> Can someone help me with right declaration usages. Your help will be 
> highly appreciated.
>
> Regards
> Alok
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From bvidinli at gmail.com  Fri May  2 03:07:55 2008
From: bvidinli at gmail.com (bvidinli)
Date: Fri, 2 May 2008 10:07:55 +0300
Subject: where do I begin with web programming in python?
In-Reply-To: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <36e8a7020805020007n554f1dadm49571aade9fd1bc4@mail.gmail.com>

i also asked same question in this list last week.
i found http://www.cherrypy.org/ to be most suitable for me.
it is basic, easy, pure...
it contains its own webserver, very easy to start.

others have many framworks, structures, classes many many..
i wanted a pure web programming system , i found cherrypy.

see you.


2008/5/2 jmDesktop <needin4mation at gmail.com>:
> I have been to the main python site, but am still confused.  I have
>  been using .net, so it may be obvious how to do this to everyone
>  else.  I am aware there are various frameworks (Django, Pylons, etc.),
>  but I would like to know how to create web pages without these.  If I
>  have mod_python or fastcgi on apache, where do I start?  I don't have
>  clue where to begin to create a web page from scratch in python.  I am
>  sure I will want to access database, etc., all the "normal" stuff, I
>  just want to do it myself as opposed to the frameworks, for learning.
>
>  Thank you for any help.
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
?.Bahattin Vidinli
Elk-Elektronik M?h.
-------------------
iletisim bilgileri (Tercih sirasina gore):
skype: bvidinli (sesli gorusme icin, www.skype.com)
msn: bvidinli at iyibirisi.com
yahoo: bvidinli

+90.532.7990607
+90.505.5667711

From gagsl-py2 at yahoo.com.ar  Fri May  2 23:15:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 03 May 2008 00:15:47 -0300
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
	<6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>
	<743d317e-bd06-42b1-a4fa-399ec18b548b@z24g2000prf.googlegroups.com>
Message-ID: <op.uaj50ldrx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:44:09 -0300, terry <itskrithika at gmail.com> escribi?:
> On May 2, 10:26?am, terry <itskrith... at gmail.com> wrote:
>> On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
>>
>> > Much of the time the exercise of writing a small demo program
>> > will lead you to the answer. ?If not, then post it, along with
>> > the output from the program that shows the problem.
>>
>> Here is the code.
>>
>> """Open serial connection"""
>> ? ? ? ? def openSerialConnection(self,serpt):
>> ? ? ? ? ? ? try:
>> ? ? ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>>
>> ? ? ? ? ? ? except:
>> ? ? ? ? ? ? ? ? self.print_u("Failed to open serial port %s. " %serpt)
>>
>> ? ? ? ? def enterThroughSerialPort(self,serpt):
>> ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>> ? ? ? ? ? ? ?self.print_u('Sending !!!!..')
>> ? ? ? ? ? ? ?while True:
>> ? ? ? ? ? ? ? ? s1.write('*')
>> ? ? ? ? ? ? ? ?c = s1.read(1)
>> ? ? ? ? ? ? ? ?if c:
>> ? ? ? ? ? ? ? ? ? self.print_u('Found "*" ')
>> ? ? ? ? ? ? ? ? ? ? break
>> ? ? ? ? ? ? print c
>> ? ? ? ? ? ? ?s1.write('enter\r')
>> ? ? ? ? ? ? ?s1.read('login')
>>
>> if __name__ == '__main__':
>> ? ? serpt = '/dev/ttyS0'
>> ? ? x.openSerialConnection(serpt)
>> ? ? # funtion to reboot the device goes here ---#
>> ? ? x.enterThroughSerialPort(serpt)
>>
>> After opening the serial connection, the device is rebooted followed
>> by sending '*' to serial port and reading back the same. I seem to
>> have problem while trying to read '*' back from serial port. First of
>> all I am not sure if serial port received the '*'.
>
> This is the err message I received:
>
> c = s1.read(1)
> File "/usr/local/lib/python2.5/site-packages/serial/serialposix.py",
> line 275, in read
>     ready,_,_ = select.select([self.fd],[],[], self._timeout)

If you want some help, you have to help us to diagnose the problem.
The above lines are just a small excerpt of the complete error report that  
surely you got; usually it includes the exception *type*, the exception  
*value*, and the whole *stack trace*. Now we have to *guess* what happened  
in that select call.
Also, when posting code, try to post the *actual* code you run - copy and  
paste it. Do not retype it again. The code you posted has indentation  
errors, uninitialized variables...
Try to make a *small*, runnable example that reproduces the problem;  
remove anything that isn't esential to the issue being discussed. Write  
down what is your expected behaviour, and what actually happens. If the  
program halts due to an error, copy the *whole* report including the  
exception type, message, and the complete traceback.

In this particular case, due to the serial device, it's improbable that  
someone will be able to execute your program, but anyway try to write the  
example code. Sometimes you may find the problem yourself just by trying  
to write the example.

A few notes on the code:

- don't create many Serial objects; create only a single instance and use  
it everywhere it is needed. (That is, instead of using '/dev/ttyS0' as an  
argument, pass the Serial object already created, or save it as an  
instance attribute: self.serial = Serial(...) )

- ensure you're using the right protocol parameters (baud rate, bits,  
parity...) for the device. That's why it helps to create the Serial object  
in a single place.

-- 
Gabriel Genellina



From wuwei23 at gmail.com  Wed May 21 22:09:08 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:09:08 -0700 (PDT)
Subject: Psyche (scheme in python), how to run on vista?
References: <01afbef9-6225-487d-9468-cbdf9b03c64b@b1g2000hsg.googlegroups.com>
Message-ID: <8c0885f8-380a-4c73-a7f4-30326c9d9563@y18g2000pre.googlegroups.com>

On May 22, 5:19 am, notnorweg... at yahoo.se wrote:
> anyone using psyche?
>
> how do you run it on Vista? what file do you click? there is no
> obvious file like psyche.py...

After installation, you should be able to find 'psyche.bat' in C:
\Python2.X\Scripts.

However, it hard codes the path for the python interpreter, so you'll
need to edit it to fix.

BUT! Doing so just reveals the next problem, running it I keep getting
complaints about the following piece of code:

  def get_epsilon(self, None = None):
    """
    Return the mapping for epsilon, or None.
    """
    return self.special.get('', None)

I've never used psyche and I've no idea what the author was thinking
here, but the 'None = None' in the function parameters is a serious
'wtf?' You need to edit site-packages\psyche\Plex\Transitions.py line
85 to be:

  def get_epsilon(self):

Then running psyche.bat will at least get the interpreter running. I
can make no guarantees on its correctness, however. But at least it
_seems_ to work:

    C:\Python25\Scripts>psyche
    Psyche version 0.4.3, Copyright (C) 2002 Y. Duppen

    Psyche comes with ABSOLUTELY NO WARRANTY.  This is free software,
and
    you are welcome to redistribute it under certain conditions; read
the
    attached COPYING for details.

    psyche> (define (plus1 x) (+ x 1))

    psyche> (plus1 2)
    3

Hope this helps!

- alex23


From jeremy+complangpython at jeremysanders.net  Wed May 21 11:13:17 2008
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Wed, 21 May 2008 16:13:17 +0100
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
	<slrng38egv.2j3.hat@se-162.se.wtb.tue.nl>
Message-ID: <g11e6d$9ka$1@gemini.csx.cam.ac.uk>

A.T.Hofkamp wrote:

> Escape the space to prevent the shell from interpreting it as a word
> seperator. This of course also holds for all other shell meta characters,
> such as * [ ] \ > < & and a few others I probably have forgotten.

If the command was useful (unlike cd), it might be better to use subprocess
to launch it so that you don't need the escaping:

subprocess.call(['ls', '8000 dir'])

This avoids using the shell.

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From notnorwegian at yahoo.se  Sun May 25 21:14:51 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:14:51 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
	<JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>
	<5cae3f71-c699-4faa-97f3-d4c33e2daf9b@d77g2000hsb.googlegroups.com>
Message-ID: <208739fb-46ab-4fc1-86c7-1b7b03d3cbe8@a70g2000hsh.googlegroups.com>

On 26 Maj, 03:04, notnorweg... at yahoo.se wrote:
> On 26 Maj, 01:30, I V <ivle... at gmail.com> wrote:
>
>
>
> > On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> > > i meant like set[pos], not iterate but access a specific position in the
> > > set.
>
> > If you need to access arbitrary elements, use a list instead of a set
> > (but you'll get slower inserts). OTOH, if you just need to be able to get
> > the next item from the set, you can use an iterator:
>
> > > now i have to do:
> > > s = toSet.pop()
> > > toSet.add(s)
>
> > i = iter(toSet)
>
> > s = i.next()
>
> > > if i want to get the url of the next item in a set, how would i do that?
> > > i can do this with a list:
>
> > > def scrapeSitesX(startAddress, toList, listPos): return
> > > scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> > > list.
> > > i can work around that but it doesnt get as elegant.
>
> > Do you have to use recursion here? Why not:
>
> > for site in toList:
> >         scrape(site)
>
> i have tried both.
>
> anyway how do i concatenate sets? which i have to if use to funcions
> like you suggest.
>
> and also when iterating a set is there any other way to avoid
> exceptions than have a counter and compare to len(set).
> is there no method that cna check if iter != None

nevermind got it how to concatenate.

but no builtin method for concatenating right?


From ian.g.kelly at gmail.com  Wed May  7 14:31:43 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 7 May 2008 12:31:43 -0600
Subject: letter frequency counter / your thoughts..
In-Reply-To: <4821e745$0$24414$5fc3050@news.tiscali.nl>
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
Message-ID: <3fc761710805071131w45fd124cs5638db218585e35f@mail.gmail.com>

On Wed, May 7, 2008 at 11:30 AM, Paul Melis <paul at floorball-flamingos.nl> wrote:
>     dic = {}
>     for letter in strng:
>         if letter not in dic:
>             dic[letter] = 0
>         dic[letter] += 1

As a further refinement, you could use the defaultdict class from the
collections module:

   dic = defaultdict(int)
       for letter in strng:
           dic[letter] += 1


From artyprog at gmail.com  Tue May 20 17:43:16 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Tue, 20 May 2008 23:43:16 +0200
Subject: Processing in Python
Message-ID: <483345f5$0$902$ba4acef3@news.orange.fr>

Hello,

The Processing Graphics language has been implemented in Javascript.
Does anybody tried to make this in Python ?

Regards

Salvatore

http://processing.org/ 




From george.sakkis at gmail.com  Fri May  9 22:00:25 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 9 May 2008 19:00:25 -0700 (PDT)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
Message-ID: <90cdf44a-f189-4264-9add-03d094ba48ab@e39g2000hsf.googlegroups.com>

On May 8, 7:50?pm, Barry Warsaw <ba... at python.org> wrote:

> On behalf of the Python development team and the Python community, I ?
> am happy to announce the third alpha release of Python 2.6, and the ?
> fifth alpha release of Python 3.0.
>
> Please note that these are alpha releases, and as such are not ?
> suitable for production environments. ?We continue to strive for a ?
> high degree of quality, but there are still some known problems and ?
> the feature sets have not been finalized. ?These alphas are being ?
> released to solicit feedback and hopefully discover bugs, as well as ?
> allowing you to determine how changes in 2.6 and 3.0 might impact
> you. ?If you find things broken or incorrect, please submit a bug ?
> report at
>
> ? ?http://bugs.python.org
>
> For more information and downloadable distributions, see the Python
> 2.6 website:
>
> ? ?http://www.python.org/download/releases/2.6/
>
> and the Python 3.0 web site:
>
> ? ?http://www.python.org/download/releases/3.0/
>
> These are the last planned alphas for both versions. ?If all goes ?
> well, next month will see the first beta releases of both, which will ?
> also signal feature freeze. ?Two beta releases are planned, with the ?
> final releases scheduled for September 3, 2008.
>
> See PEP 361 for release details:
>
> ? ? ?http://www.python.org/dev/peps/pep-0361/
>
> Enjoy,
> - -Barry

I'm trying to install on the latest Ubuntu (8.04) and the following
extension modules fail:

_bsddb, _curses, _curse_panel, _hashlib, _sqlite3, _ssl, _tkinter,
bz2, dbm, gdbm, readline, zlib

All of them except for _tkinter are included in the preinstalled
Python 2.5.2, so I guess the dependencies must be somewhere there.
Does Ubuntu have any non-standard lib dir ?

George


From castironpi at gmail.com  Fri May 16 09:51:46 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:51:46 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
Message-ID: <c0ffe984-87e1-4900-b7ac-c79b74e5090e@k13g2000hse.googlegroups.com>

On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
> ?? wrote:
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> The implementation of slots depends on that behaviour:
>
> http://docs.python.org/ref/slots.html
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> Can you expand on that?
>
> Peter

Spirals are important.


From maxm at mxm.dk  Sun May  4 16:13:02 2008
From: maxm at mxm.dk (Max M)
Date: Sun, 04 May 2008 22:13:02 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same    time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <481E18CE.90508@mxm.dk>

Gilly skrev:
> Hi
> I am trying to create an application that uses some form of input to
> create a midi file.
> I would like for this to be a 'real time' process. In other words, I
> want to be able to begin playing the midi file before I finish writing
> it, and continue writing as it plays.


Perhaps csound can help with this. It has a lot of midi, realtime and 
python stuff.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 06:01:31 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 12:01:31 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>
	<ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>
Message-ID: <4833f2ef$0$3737$426a74cc@news.free.fr>

sturlamolden a ?crit :
> On May 19, 10:42 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
> 
>> Well... They do - they are called 'C compilers' !-) As Roel Schroven
>> mentioned - and he is at least partially right on this point - C has
>> been designed to make optimizing C compiler not to hairy to write.
> 
> C has proven very difficult to optimize, particularly because pointer
> aliasing prevents efficient register allocation.

Does this compare to optimizing something like Python ? (serious 
question, but I think I already know part of the answer).


From chris.hulan at gmail.com  Wed May 28 10:34:18 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Wed, 28 May 2008 07:34:18 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
	<3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>
Message-ID: <e1774ff4-32df-413d-9400-c5697f945d82@56g2000hsm.googlegroups.com>

On May 28, 4:59 am, s0s... at gmail.com wrote:
> On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
...
> Thanks. So if OSError().errno == errno.ENOENT, then it means the path
> doesn't exist? (What does "ENOENT" stan for?)

I always read it as Error NO ENTry


From spoier at gmail.com  Tue May 20 12:26:11 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 09:26:11 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
Message-ID: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>

How do I access the sysctl(3) call from Python on BSD?

Specifically I want to retrieve:

$ sysctl -d net.inet.ip.stats
net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)

So I'll need some way of getting to struct ipstat from Python as well

Thanks,
Skye



From nick at craig-wood.com  Thu May 15 04:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 15 May 2008 03:30:03 -0500
Subject: sys.excepthack...
References: <dullrich-866845.15471814052008@text.giganews.com>
Message-ID: <slrng2nran.osj.nick@irishsea.home.craig-wood.com>

David C. Ullrich <dullrich at sprynet.com> wrote:
>  Becoming a fan of wxPython, but I can't stand
>  what it does with error messsages 
[snip]
>  So I want to pop up a modal dialog on error.
[snip]
>  Came up with a ridiculous hack involving both sys.stderr
>  and sys.excepthook. Works exactly the way I want.
>  Seems ridiculous - what's the right way to do this?
> 
>  Ridiculous_hack.py:
> 
>  import sys
>  import wx
> 
>  def hook(*args):
>    try:
>      sys.__excepthook__(*args)
>    finally:
>      printer.Show()
> 
>  class ErrorDisplay:
>    def __init__(self):
>      self.buffer = ''
>    def write(self, text):
>      self.buffer = self.buffer + text
> 
>    def Show(self): 
>        wx.MessageDialog(None, str(self.buffer), 
>                        'Error:',wx.OK).ShowModal()
>        self.buffer = ''
> 
>  printer = ErrorDisplay()
>  sys.stderr = printer
>  sys.excepthook = hook

Here is how I've done it in the past.  It is a complete runnable
example :-

------------------------------------------------------------
#!/usr/bin/python

import wx
import sys
from traceback import format_exception

class TestApp(wx.Frame):
    """Test error handling"""

    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, -1, title, size=(200,200))
        sys.excepthook = self.OnException
        button = wx.Button(self, wx.NewId(), "Produce Error")
        self.Bind(wx.EVT_BUTTON, self.OnClick)
        self.Show(True)

    def OnException(self, type, value, traceback):
        """
        Called on OnException
        """
        error_text = "".join(format_exception(type, value, traceback))
        wx.MessageDialog(None, error_text, 'Custom Error:', wx.OK).ShowModal()

    def OnClick(self, evt):
        "Click with a deliberate mistake"
        adsfsfsdf

if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = TestApp(None, -1, "Test")
    app.MainLoop()
------------------------------------------------------------

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From vadim.pestovnikov at gmail.com  Fri May  9 00:42:33 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 8 May 2008 21:42:33 -0700 (PDT)
Subject: Which way is faster for a simple web reporting system: django, web.py 
	or cgi
Message-ID: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>

Hi all,

May be this is a dump question, but it makes me crazy in my research.
I am not a developer but I have experience with web development (PHP)
in a past. Most my activities are around database administration and
design. For most database administration tasks I am using Python. Very
often I need to come up very quickly with web interface or web
application to a database, more then less complicated. The standard
set is:

* speed of the development (I think a framework is the way, but which
one?)
* user authorization (my preferences are sessions)
* form validation for input data
* file uploading
* export data to different format like csv, pdf, xml

For example I need to create a simple reporting system. Using
different filters like HTML drop down lists, radio buttons, check
boxes and etc., I need to generate different output to my team and
managers.

I realize that today is very popular and useful, using a framework.
Which Python framework or solution will be more faster to start (i.e.
for start, usually I have maximum two weeks, if a project looks like a
stable I can get three, four weeks), flexible (i.e. using SQL queries
together with views) and easier in integration: django, web.py, CGI or
something else?

Thanks in advance.


From michele.simionato at gmail.com  Thu May 29 13:34:42 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 29 May 2008 10:34:42 -0700 (PDT)
Subject: undocumented functions in pkgutil
Message-ID: <04d9dbd9-ad9c-4756-afa5-163800a785eb@t54g2000hsg.googlegroups.com>

I see that the pkgutil module has many useful functions which are
however undocumented.
Does anybody know why it is so? In particolar, can I safely use
pkg.walk_packages
without risking a change of interface in the future? I looks unlikely,
since pkgutil is
used in setuptools, but I want to be sure before relying on it.

    Michele Simionato


From wgumgfy at gmail.com  Fri May  9 02:43:03 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 23:43:03 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>
Message-ID: <68ia3oF2t5308U1@mid.individual.net>

Lew wrote:
> Waylen Gumbal wrote:
>> Not everyone follows language-neutral groups (such as
>> comp,programming as you pointed out), so you actually reach more
>> people by cross posting. This is what I don't understand - everyone
>> seems to assume that by cross posting, one intends on start a
>> "flamefest", when in fact most such "flamefests" are started by
>> those who cannot bring themselves to skipping over the topic that
>> they so dislike.
>
> It's not an assumption in Xah Lee's case.  He spams newsgroups
> irregularly with rehashed essays from years ago, and a number of
> people are just tired of him.

I did not know this. One should obviously not do that.

> Don't blame the victims for the perpetrator's actions, OK?

I'm not blaming any "victims", but I don't see anyone saying "read this 
or else", so why not just skip the thread or toss the OP in your 
killfile so you don't see his postings. If others want to discuss his 
topics, who are you or I to tell them not to?

-- 
wg 




From samslists at gmail.com  Sat May  3 14:12:45 2008
From: samslists at gmail.com (samslists at gmail.com)
Date: Sat, 3 May 2008 11:12:45 -0700 (PDT)
Subject: Problems replacing \ with \\
References: <0ca30eb2-3791-4910-9e78-f32e3b2a72cb@2g2000hsn.googlegroups.com> 
	<mailman.13.1208830370.6645.python-list@python.org>
Message-ID: <19fcd6b9-75b7-480d-bf0b-572c52e213c5@f24g2000prh.googlegroups.com>

Sorry for the late response.  I've been travelling internationally and
am just getting back to work.

So--thank you to everyone who responded!

To answer everyone's question---- I am dumping all of the data from a
mysql database, then creating a postgresql database, then inserting
the data into the new postgresql database.

This seems to be a reasonable way to do it, because all I have to do
is double my 's and my \s (I hope).

Thanks


On Apr 21, 7:12?pm, Michael Torrie <torr... at gmail.com> wrote:
> samsli... at gmail.com wrote:
> > Hi...
>
> > Here's a weird problem...I'm trying to escape a bunch of data to put
> > into a database.
>
> Is it possible to use the database API and prepared statements to avoid
> having to go through this exercise? ?Also, most database APIs work
> natively in unicode, so creating your prepared statement and then
> passing in each parameter as an argument saves a lot of hassle, since
> the API's usually decode the unicode strings automatically.



From davidj411 at gmail.com  Fri May 23 15:04:43 2008
From: davidj411 at gmail.com (davidj411)
Date: Fri, 23 May 2008 12:04:43 -0700 (PDT)
Subject: function returns , but variable values has not changed in the 
	interactive prompt
Message-ID: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>

if you run execfile function to run a python script and that script
has variables and functions, should't those variable change in the
interactive prompt too?

script snippet that calls the function which should return like this
	return (stuffedname,bigstring, numbertimes,num_times_search_string)

this is the variable that calls the functions. when a function returns
something AND there is a variable set as shown immediately below,
does't the variable get updated?

tu_count = CountStrings (name, balance, searchstr)

this is the output from the script.
notice how tu_count actually differs when called from interactive
prompt after script exits.

tu_count: ('peterjackson', 'peterjacksonpeterjacksonpeter', 2, 0)
<type 'tuple'>

>>> tu_count
('davidjacksondavidjacksondavid', 2, 0)

thanks


From jkugler at bigfoot.com  Mon May 12 13:12:21 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Mon, 12 May 2008 09:12:21 -0800
Subject: Saving an audio file's waveform into an image
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <g09tpl$9qa$1@ger.gmane.org>

Julien wrote:

> Hi,
> 
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?

Take a look at http://code.enthought.com/projects/chaco/  One of their
examples does exactly this. Last example on this page:
http://code.enthought.com/projects/chaco/gallery.php

Hope that helps.

j




From paddy3118 at googlemail.com  Tue May 20 17:29:49 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 20 May 2008 14:29:49 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <7c50dabd-7644-4166-9ac7-87d8c9b10384@a32g2000prf.googlegroups.com>

On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 8:13 am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > I posted this code last night in response to another thread, and after I
> > posted it I got to wondering if I had misused the list comprehension. Here's
> > the two examples:
>
> > Example 1:
> > --------------------
> > def compress(s):
> >     new = []
>
> >     for c in s:
> >         if c not in new:
> >             new.append(c)
> >     return ''.join(new)
> > ----------------------
>
> > Example 2:
> > ------------------------
> > def compress(s):
> >     new = []
> >     [new.append(c) for c in s if c not in new]
> >     return ''.join(new)
> > --------------------------
>
> > In example 1, the intention to make an in-place change is explicit, and it's
> > being used as everyone expects it to be used. In example 2, however, I began
> > to think this might be an abuse of list comprehensions, because I'm not
> > assigning the result to anything (nor am I even using the result in any
> > way).
>
> > What does everyone think about this? Should list comprehensions be used this
> > way, or should they only be used to actually create a new list that will
> > then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?

... Because it obscures the intent of the code.

- Paddy.


From bronger at physik.rwth-aachen.de  Tue May 13 13:28:10 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 13 May 2008 19:28:10 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
Message-ID: <87d4nqgllh.fsf@physik.rwth-aachen.de>

Hall?chen!

Dave Parker writes:

>>  Notice that I said "free software", not "*** FREE *** software
>> !!!!  1!" (that is, free as in freedom, not free as in
>> beer). Read again my answer, considering this.
>
> I misread your meaning.

... twice.  Flaming Thunder itself is not free software, is it?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From scott at rscorp.ab.ca  Thu May  1 10:59:33 2008
From: scott at rscorp.ab.ca (Scott Sandeman-Allen)
Date: Thu,  1 May 2008 08:59:33 -0600
Subject: Photo gallery software
In-Reply-To: <0001HW.C43F80E40094984AB01AD9AF@news.individual.de>
Message-ID: <r02010500-1049-35F8E598178F11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Jumping Arne (arnlen at mac.com) wrote:

>I've searching for some software that would allow me to present my photos on 
>the web (I'm not interested a software that generates static pages that I 
>upload) and there are quite a few, see for example 
><http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
>haven't managed to find one that I like - Gallery 2 is close.
>
>So I've started to see if there is one that is based python (PHP isn't really 
>"my language") but when I search on Google almost the only thing I find are 
>photo galleries of snakes (to be honest I didn't know that people were *that* 
>interested in pythons).
>
>Do any anyone know if there exists photo gallery software written in Python?
>
>I've found
><http://www.amk.ca/python/code/gallery>
><http://www.developer.com/lang/other/article.php/3734416>

I've been working with Photologue for a while with some nice results.
    <http://code.google.com/p/django-photologue/>

It is a Django project 
    <http://www.djangoproject.com/>,

It includes support for tagging:
    <http://code.google.com/p/django-tagging/> 

It easily allows configuration of different image sizes and integrates with generic templates providing gallery and detail view support. 

HTH

Scott


From jcd at unc.edu  Wed May  7 15:49:14 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Wed, 07 May 2008 15:49:14 -0400
Subject: [Fwd: Re: Am I missing something with Python not having interfaces?]
Message-ID: <1210189754.4595.4.camel@aalcdl07.lib.unc.edu>


-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill
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From ivan.illarionov at gmail.com  Tue May 20 04:50:18 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:50:18 +0000 (UTC)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <g0u3c9$1fec$3@news.mtu.ru>

On Mon, 19 May 2008 11:07:06 -0700, Vicent Giner wrote:
[...]
> 
> By the way, is it possible (and easy) to call a C function from a Python
> program??

Yes.

http://groups.google.com/group/comp.lang.python/msg/9d47913a265c348a

-- Ivan


From kamhung.soh at gmail.com  Tue May 13 01:08:04 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 15:08:04 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<mailman.956.1210562648.12834.python-list@python.org>
	<f0PVj.262779$pM4.237055@pd7urf1no>
	<Hbydndu0pf_fYrXVnZ2dnUVZ_vadnZ2d@pdx.net>
	<SQ7Wj.264445$pM4.99013@pd7urf1no>
Message-ID: <op.ua2tvsvaev04yd@melwxp23>

On Tue, 13 May 2008 13:23:30 +1000, Yves Dorfsman <yves at zioup.com> wrote:

> Scott David Daniels wrote:
>> Yves Dorfsman wrote:
>>> ... Sorry this was a typo (again :-), I meant:
>>> d = time.local()
>>>   y = d[0]
>>>   d = d[2]
>> Then:
>>     y, d = list(time.localtime())[:4:2]
>>
>
> What is this ?
> Could you point me to a document on this syntax ?
>
> I've tried it, it works, but I don't understand how.
>
>
> Thanks.
>
> Yves.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

See:

"Built-in Functions", "slice()",  
http://docs.python.org/lib/built-in-funcs.html

l = range(10)
l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
l[:4]   # first four elements
[0, 1, 2, 3]
l[::2]  # every second element
[0, 2, 4, 6, 8]
l[:4:2] # every second element in the first four elements
[0, 2]

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kd015b3257 at blueyonder.co.uk  Sat May 10 07:21:16 2008
From: kd015b3257 at blueyonder.co.uk (kdwyer)
Date: Sat, 10 May 2008 12:21:16 +0100
Subject: PyXml
References: <mailman.890.1210367123.12834.python-list@python.org>
	<mailman.892.1210376249.12834.python-list@python.org>
	<4825361E.8000102@behnel.de>
Message-ID: <g041cs$d1d$1@ger.gmane.org>

Stefan Behnel wrote:

> Martin v. L?wis wrote:
>>> Can anyone recommend a Python validating parser that validates vs Xml
>>> Schema?
>> 
>> The libxml bindings for Python can do that.
> 
> ... although the OP will likely prefer using lxml, where it's three lines
> of Python (ok, plus an import), compared to quite a bit of code in the
> official libxml2 bindings.
> 
> http://codespeak.net/lxml
> 
> Stefan
> --
> http://mail.python.org/mailman/listinfo/python-list

Stefan, Martin,

Thanks for your replies.

Kev



From prasanths89 at gmail.com  Sun May 25 12:13:57 2008
From: prasanths89 at gmail.com (Prasanth)
Date: Sun, 25 May 2008 09:13:57 -0700 (PDT)
Subject: Pinging a machine from python
Message-ID: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>

I tried pinging a machine from python using socket programming but
could not do it. Is there any module which we can use to ping the
machine < like net::ping in perl> or can you give me simple program.


From notnorwegian at yahoo.se  Sat May 24 19:20:19 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sat, 24 May 2008 16:20:19 -0700 (PDT)
Subject: webspider getting stuck
Message-ID: <d8d8adac-f763-43ca-8162-b6ee9cf3271b@l64g2000hse.googlegroups.com>

i am writing a simple webspider .

how do i avoid getting stuck at something like this:
Enter username for W3CACL at www.w3.org:

?

i can obv add an if-clause for the specific site but since i guess
there will be more of the same thats ov not a viable approach in the
long run.


From zondo42 at googlemail.com  Sun May  4 20:00:27 2008
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: Mon, 05 May 2008 01:00:27 +0100
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <m31w4hk4bo.fsf@googlemail.com>

notbob <notbob at nothome.com> writes:
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.

You're very likely to receive help here.  Or at the very least, people will
point you at the best place to get it.  Fire away!

Glenn


From theller at python.net  Wed May 21 02:29:46 2008
From: theller at python.net (Thomas Heller)
Date: Wed, 21 May 2008 08:29:46 +0200
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
	<d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>
Message-ID: <69htqnF32242iU1@mid.individual.net>

Skye schrieb:
> Great, thanks for the help (I'm fairly new to Python, didn't know
> about ctypes)
> 
>     from ctypes import *
>     libc = CDLL("libc.so.7")
>     size = c_uint(0)
>     libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
>     buf = c_char_p(" " * size.value)
>     libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

IIUC, sysctlbyname writes the information you requested into the buffer supplied
as second argument.  If this is true, then the above code is incorrect.
c_char_p(src) creates an object that shares the buffer with the Python string 'src';
but Python strings are immutable and you must not write ctypes code that modifies them.

Instead, you should code:

     from ctypes import *
     libc = CDLL("libc.so.7")
     size = c_uint(0)
     libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
     buf = create_string_buffer(size.value)
     libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

Thomas


From thudfoo at opensuse.us  Sat May 10 13:47:42 2008
From: thudfoo at opensuse.us (member thudfoo)
Date: Sat, 10 May 2008 10:47:42 -0700
Subject: list object
In-Reply-To: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
References: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>
Message-ID: <3d881a310805101047s1cc9c803wb87805e8044b514c@mail.gmail.com>

On 5/10/08, Gandalf <goldnery at gmail.com> wrote:
> my manual contain chapter about lists with python. when i try to copy
>  paste :
>
>  li = ["a", "b", "mpilgrim", "z", "example"] (1)
>
>
>  it i get this errore:
>
>  "TypeError: 'list' object is not callable"
>
>  i was wondering if their is  any special module I should import before
>  i use this function
>
>  i know i ask foolish questions it's my first day with python and i
>  have experience only with PHP and javascript, so please be patient
>
>  thanks
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>

Remove the "(1)"


From duncan.booth at invalid.invalid  Sun May 25 05:25:25 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 May 2008 09:25:25 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
Message-ID: <Xns9AA96A134C3B6duncanbooth@127.0.0.1>

bearophileHUGS at lycos.com wrote:

> Ben Finney:
>>In Python, the philosophy "we're all consenting adults here" applies.<
> 
> Michael Foord:
>> They will use whatever they find, whether it is the best way to
>> achieve a goal or not. Once they start using it they will expect us to
>> maintain it - and us telling them it wasn't intended to be used by
>> them in the first place won't cut it.
> 
> So they will use the methods with one or two underscores too. And
> imply that you want to document them too.
> They don't seem adult enough, then ;-)
> Internal API hiding seems quite less useful if you don't need to let
> customers manage your code.
> 
Or if you code in C++ and they *really* need to get at something you made 
private they will still get at it. I've been there and done that: 'private' 
in languages which have it is rarely an advantage and frequently a pain.

Also note that private in C++ while it does make it harder to access 
(though not preventing it altogether) doesn't do any data hiding, so if you 
are subclassing a vendor-provided function you still have to take note of 
the private attributes to avoid naming collisions.

At least Python's convention which hides the implementation without making 
it hard to access has some benefits.


From _karlo_ at _mosor.net_  Thu May 22 04:19:40 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Thu, 22 May 2008 08:19:40 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
	<a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>
	<Xns9AA6596091F47duncanbooth@127.0.0.1>
Message-ID: <Xns9AA6690FE6B5Dmosornet@161.53.160.65>

Duncan Booth <duncan.booth at invalid.invalid> wrote in 
news:Xns9AA6596091F47duncanbooth at 127.0.0.1:

> Catching only the specific exceptions you think you can handle would 
> be  more Pythonic: that way things like sys.exit() will still work 
> inside some_function.

I know, this was just a somewhat poorly example ;).

> I prefer a 'for' loop rather than 'while' so I can limit the number of 
> retries.
> 
> The following may or may not be 'more pythonic', but is something I've 
> used. It's a factory to generate decorators which will retry the 
> decorated function. You have to specify the maximum number of retries, 
> the exceptions which indicate that it is retryable, and an optional 
> filter function which can try to do fixups or just specify some 
> additional conditions to be tested.

Interesting approach, I think I'll use something like that for avoding 
infinite loops. Thanks a lot...



-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From ian.g.kelly at gmail.com  Tue May 27 23:46:58 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 21:46:58 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
	<3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
	<op.ubudjtlox6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <3fc761710805272046k1d6d01b0x53afd81971761cda@mail.gmail.com>

On Tue, May 27, 2008 at 8:08 PM, Gabriel Genellina
<gagsl-py2 at yahoo.com.ar> wrote:
> En Tue, 27 May 2008 14:43:52 -0300, Ian Kelly <ian.g.kelly at gmail.com>
> escribi?:
>
>> It sounds like the wasteful list creation is the biggest objection to
>> using a list comprehension.  I'm curious what people think of this
>> alternative, which avoids populating the list by using a generator
>> expression instead (apart from the fact that this is still quadratic,
>> which I'm aware of).
>>
>> def compress(s):
>>   new = []
>>   filter(None, (new.append(c) for c in s if c not in new))
>>   return ''.join(new)
>
> filter returns a newly created list, so this code is as wasteful as a list
> comprehension (and harder to read).

Here it returns a newly created *empty* list, which is not nearly as
wasteful as one that's linear in the size of the input.  I'll grant
you the second point, though.  I very much doubt that I would ever
actually use this myself.  I was just curious what others would think
of it.


From grante at visi.com  Fri May  2 10:46:43 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:46:43 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
Message-ID: <mu2dnYvNde3OtIbVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> wrote:
> -On [20080502 07:51], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>>To my mind, the Python interpreter installed by a package as
>>distributed with the OS *is* OS territory and belongs in /usr/bin/.
>
> That's the difference with a distribution, such as Linux, and full OSes ,
> such as BSDs or commercial Unix variants. They prefer to keep a pristine
> state for the OS vendor files

Python _is_ an OS vendor file in the Linux world.

> versus what the user can opt to install himself,

Traditionally, Python has not been optional.

> hence the /usr/bin - /usr/local/bin separation. Same for sbin,
> lib, and so on. It effectively guarantees you can nuke
> /usr/local without ill consequences for your OS.

That's the point. You _couldn't_ nuke Python and have your
system keep running.  That's why it was in /usr/bin.

-- 
Grant



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:38:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:38:58 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <48363c34$0$15204$607ed4bc@cv.net>
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <4836747b$0$15488$426a74cc@news.free.fr>

John Salerno a ?crit :
> I know that it is good programming practice to keep GUI and logic code 
> physically separate, by using XRC for example, but I'm wondering if it's 
> also good practice (and even possible) to keep them separate from an 
> implementation standpoint as well. Basically what I mean is, should it 
> be possible to write, for example, the logic for a strategy game without 
> even knowing what the graphics will look like or how they will work?

Depends on your definition of "logic". The point is not "keep GUI and 
logic code" separate, but to keep "domain" logic (as) separated (as 
possible) from user-interface stuff.

> To be more specific, let's say I want to create a simple, 2D strategy 
> game. It will have a board layout like chess or checkers and the player 
> will move around the board. Let's say this is all I know, and perhaps I 
> don't even know *this* for sure either. Is it possible to write the 
> logic for such a game at this point?

Yes : build a model of the board and pieces and functions/methods to 
allow (code-level) interaction with it. Then your user interface will 
just have to create a visual representation of this model (let's call it 
a view) and present the user with ways (connected to things we'll call 
'controllers') to call the interaction functions/methods.

Then : the view registers itself with the model, display itself, and 
wait for user interactions. These user interactions are sent to the 
appropriate controller, which will call on the model's interaction 
functions/methods. Then the model updates itself and notify the view 
that it's state has changed, so the view can refresh itself.

Ever heard of the "Model/View/Controller" pattern ?

> Let's say I want to write a "move" function (or perhaps it would be a 
> method of a "Character" class) for moving the player around. Could you 
> really write this function without 1) knowing what the interface will 
> look like, and 2) integrating GUI code with the logic?

Yes. The move function will modify the state of the board/pieces 
("character", whatever) model, which will then notify whoever is 
interested that it's state has changed.

> Another example could be printing messages to the player. If I need to 
> say "You killed the monster!", is there a general way to write this, or 
> do I need to specifically refer to GUI widgets and methods, etc. in 
> order for it to be displayed properly?

Idem. State change, notification.

> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

s/GUI/ui/g

The user interface doesn't need to be graphical. There were games and 
emails clients and text editors before GUIs existed, you know ?



From arnodel at googlemail.com  Fri May  2 15:26:55 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 02 May 2008 20:26:55 +0100
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<mailman.471.1209752434.12834.python-list@python.org>
	<9ee1e917-a0c2-4c03-b611-e409e315c071@x41g2000hsb.googlegroups.com>
Message-ID: <m2wsmca4n4.fsf@googlemail.com>

Mensanator <mensanator at aol.com> writes:

> On May 2, 1:20?pm, Michael Torrie <torr... at gmail.com> wrote:
>> Mensanator wrote:
>> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>> >> Shawn Milochik wrote:
>> >>> How does one "plonk" stuff from Google Groups? Specifically, how
>> >>> can this be done in Gmail?
>> >> Set up a filter that looks for some phrase in the mail headers that
>> >> identifies messages originating from google groups. ?Gmail's filters are
>> >> fairly flexible. ?I'd probably just have it look for certain words.
>> >> Look at an e-mail's source (raw view) and particularly check in the
>> >> headers for things to filter by.
>>
>> > Why don't you just block all messages from Gmail?
>>
>> Brilliant! ?Seeing as he's asking about doing the filtering in Gmail
>> (implying it's use for his own posting and viewing the list) that would
>> work splendidly for him! ?Or not.
>>
>> Of course you're not likely to see this message either since I and many
>> folks on here post from gmail.
>>
>> Spam comes mainly from Google Groups, not as much from Gmail in my
>> experience.
>
> I didn't say it was POSTED from gmail, but the spammers often have
> gmail addresses, to wit:

You're confusing gmail addresses and Google Groups
(groups.google.com), which can be used as a web interface to usenet
and mailing lists.  Look at the 'Organisation' header of the messages
you quote.

It seems most of the spam on comp.lang.python is posted from Google
Groups, *including* the one with a 'From' header which is not a gmail
address.

So it would be more efficient to block messages posted from Google
Groups than the ones from gmail addresses.

-- 
Arnaud


From hugo_hurtig at hotmail.com  Sat May 10 20:40:27 2008
From: hugo_hurtig at hotmail.com (hugo_hurtig at hotmail.com)
Date: 11 May 2008 00:40:27 GMT
Subject: generic chemical ampicillin chloramphenicol allergy antibiotic
	generic drug information generic tablets 1
Message-ID: <4826407b$0$6434$834e42db@reader.greatnowhere.com>

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From tjreedy at udel.edu  Sun May 11 21:20:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 May 2008 21:20:58 -0400
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
	<845f3e49-14ef-43dd-8cc9-806f1f50690c@59g2000hsb.googlegroups.com>
Message-ID: <g0861o$cnq$1@ger.gmane.org>


"Sven Siegmund" <sven.siegmund at gmail.com> wrote in message 
news:845f3e49-14ef-43dd-8cc9-806f1f50690c at 59g2000hsb.googlegroups.com...
|> I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
| > can:
|
| Oh I see the posts in this newsgroup do not yet support Unicode.

I think this depends on the reader and maybe the fonts on the system.
OutlookExpress displays hatted c, for instance, fine.

 Most
| of the special characters in my source code have been messed up. But
| anyway, those who know Czech can handle it. The error is replicable
| even with the messed-up characters.





From lists at cheimes.de  Fri May  2 06:07:11 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 12:07:11 +0200
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C   
	libraries on Windows
In-Reply-To: <86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>	<_X8Sj.3499$XI1.3261@edtnps91>
	<cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>	<mailman.437.1209681507.12834.python-list@python.org>
	<86718726-ca5b-4f84-9fc9-7e13bcd25140@q24g2000prf.googlegroups.com>
Message-ID: <481AE7CF.20901@cheimes.de>

illume schrieb:
> There are still *lots* of people who still use win95, 98, 98se, me,
> and win2k - as shown by the statistics I linked to in a previous
> post.  If you want more statistics about the number of people using
> what OS they are fairly easy to find with a search engine.  One day
> win9x will be finally dead, but that's not yet(and the w3c stats show
> it's usage actually increasing in march!).

Windows 2000 is still supported by Python 2.6 and 3.0 although you may
get into trouble if you haven't installed at least SP4.

Christian


From technopax at gmail.com  Tue May 13 15:53:42 2008
From: technopax at gmail.com (Technopax)
Date: Tue, 13 May 2008 12:53:42 -0700 (PDT)
Subject: Socializing site EXCLUSIVELY for TECHIES
Message-ID: <6abacda4-76b0-4e73-82b8-4da58c42815e@d19g2000prm.googlegroups.com>

Technopax.com, (http://www.technopax.com) the first socializing web
portal exclusively catering to the IT Professionals world over is
launched.

This web portal will be a common online platform for IT industry
related professionals. Technopax.com primarily targets computer
software and hardware professionals, networking & system
administrators, nano Technologists, bio-technologists, graphics &
animation designers, BPO/Call Center/ITES employees, telecom experts,
employees of IT Departments of all business organizations and
technology students etc as its members.

According to the promoters, an online platform exclusively for Techies
will improve their technical and professional skills through the
sharing of knowledge base, methodologies and skill sets.  Apart from
building vast friends circle, this will also help them to be abreast
with the latest developments that happen in the tech front world over.

Technopax.com has many features for the members to collaborate and
socialize.  It has text/audio and video chat, online clubs, events,
forums, classified advertisements, discussion rooms, music and video
sharing, web profiles etc. Please verify.


From http  Thu May  8 20:01:42 2008
From: http (Paul Rubin)
Date: 08 May 2008 17:01:42 -0700
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
Message-ID: <7xve1oxs49.fsf@ruckus.brouhaha.com>

dave <squareswallower at 1ya2hoo3.net> writes:
>                         if newtlist not in mapdic:
>                                     mapdic[newtlist] = [line]
>                         if line not in mapdic[newtlist]:
>                                     mapdic[newtlist].append(line)

I'd use the defaultdict module to avoid the above.

>             for value in mapdic.values():
>                         if len(value) <= 1:
>                                     pass
>                         else:
>                                     print value

I'd write:

           for value in mapdic.values():
                  if len(value) > 1:
                        print value

I'd actually use itervalues rather than values, but that's a little
bit fancy, you don't have to worry about it til later.


From notnorwegian at yahoo.se  Fri May 23 23:30:10 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 20:30:10 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
Message-ID: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>

when running a very computationalheavy program in the shell it
sometimes freezes but the commandprompt runs it without problems and
muh faster, why?


also, the command prompt starts at C:\Users\user>

i want to start at C:\python25\progs

how do i change that?


From lixinyi.23 at gmail.com  Fri May 30 20:02:06 2008
From: lixinyi.23 at gmail.com (Lee)
Date: Sat, 31 May 2008 09:02:06 +0900
Subject: How to get all the variables in a python shell
In-Reply-To: <cde117f1-6bed-484f-a97a-ba060389c20a@x35g2000hsb.googlegroups.com>
Message-ID: <001001c8c2b1$919e74e0$1740a8c0@xxip78t6pqlqgp>

Hi, thank your for your reply. I will try iPython.

I did try sage for a while, but I found it quite heavy, and I'm not sure
whether it's easy to expand like python or not. New libraries can be
easily imported in python, and those libraries could be build in almost
any popular computer 
language. Can sage do that? 

The reason why I want to work on this is the same with you. I'm an
automotive engineer. What I need is a powerful 
yet light-weight computation software, which can help me in analyzing
datas on the engine test bench. Matlab is powerful, but it contains so
much stuff that I actually don't need but have to buy, and you know that

it's quite expansive. 

So my idea is to build a GUI with python first, and then intergrate as
many exsiting computation libraries as possible. There also has to be a
plotting app, which is quite important and need to think about. I did
try Gnuplot-python combination and matplotlib,  but found both terrible
inferior to Matlab plotting functionality.  Do you know any plotting
programs written in 
python?


-----Original Message-----
From: python-list-bounces+lixinyi.23=gmail.com at python.org
[mailto:python-list-bounces+lixinyi.23=gmail.com at python.org] On Behalf
Of caca at mailinator.com
Sent: Friday, May 30, 2008 9:55 PM
To: python-list at python.org
Subject: Re: How to get all the variables in a python shell


  Your project interests me. Actually I was thinking about doing the
same. I hadn't worked on it at all, but I though about it and had the
idea about reading the session namespace directly, which I though would
be stored in the __dict__ attribute of something.

  After reading your post, I have been trying a little bit, and I have
found a way to do it with ipython. If you open an ipython console, press
_ then hit TAB, you'll see it stores some useful information, including
all input, all output, and after some searching, a dictionary matching
all variables to its values.

__IPYTHON__.user_ns

  There is a little extra stuff in there that you don't want, but that
can be easily filtered (the extra stuff is either 'In', 'Out', 'help' or
starts with '_'). I've tried it, and you can change the value in that
dict to alter the value of the real variable. Say you have a variable
'test':

test=5
__IPYTHON__.user_ns['test']=4
print test #prints 5

  If I get it right, python is a dynamic language, and you won't break
things by messing around with its inner stuff like this, but you better
check it.

  Is this what you had in mind?
--
http://mail.python.org/mailman/listinfo/python-list



From jkrukoff at ltgc.com  Thu May 15 19:32:44 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:32:44 -0600
Subject: no inputstream?
In-Reply-To: <1210893082.3312.2.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>
Message-ID: <1210894364.3312.10.camel@jmk>


On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > >
> > > > you're right, my java implementation does indeed parse for Id3v2
> > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > i buffer and parse.  apologies if i misrepresented my code!
> > >
> > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > work:
> > >
> > > > from mutagen.mp3 import MP3
> > > > id3tags = MP3(urllib2.urlopen(URL))
> > >
> > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > string or buffer, instance found".  does this mean i need to convert
> > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > directory" errors, with a few HTTP 404s.
> > >
> > > [snip]
> > > I think it's expecting the path of the MP3 but you're giving it the
> > > contents.
> > 
> > cool, so how do i give it the path, if not in the form of a URL
> > string?  maybe this is obvious...
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> 
> It doesn't look like you can, with mutagen. So, time to find a different
> library that supports arbitrary file objects instead of only file paths.
> I'd suggest starting here:
> http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> 
> Possibly one with actual documentation, since that would also be a step
> up from mutagen.
> 

After a bit of time looking around, looks like nearly all the python id3
modules expect to work with filenames, instead of file objects.

I can't vouch for it, and the documentation still looks sparse, but this
module at least looks capable of accepting a file object:
http://pypi.python.org/pypi/tagpy

Looks like it'd be a challenge to build if you're on windows, since it
depends on an external library.

Alternately, you could probably create a subclass of the mutagen stuff
that used an existing file object instead of opening a new one. No idea
what that might break, but seems like it would be worth a try.

As last ditch option, could write the first few kb of the file out to a
temp file and see if mutagen will load the partial file.

-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From smitty1e at gmail.com  Sat May  3 16:50:16 2008
From: smitty1e at gmail.com (smitty1e)
Date: Sat, 3 May 2008 13:50:16 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
	<87ve1wxdyk.fsf@benfinney.id.au>
Message-ID: <d4dfe9c6-b725-4c6b-9533-519ea5bc0005@f36g2000hsa.googlegroups.com>

On May 2, 11:29 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> smitty1e <smitt... at gmail.com> writes:
> > Just a fun exercise to unify some of the major input methods for a
> > script into a single dictionary.
> > Here is the output, given a gr.conf file in the same directory with
> > the contents stated below:
>
> > smitty at localhost ~/proj/mddl4/test $ ./inputs.py
> > {'source_db': '/home/sweet/home.db'}
> > smitty at localhost ~/proj/mddl4/test $ source_db="test_env" ./inputs.py
> > {'source_db': 'test_env'}
> > smitty at localhost ~/proj/mddl4/test $ ./inputs.py -f "test_cli"
> > {'source_db': 'test_cli'}
>
> A good start. However, you need to account for two conventions with
> configuration of programs via environment variables:

[snip]
> This is probably best done by a mapping specifically for the
> environment variable names:
>
>     config_env_names = {
>         'source_db': 'GR_SOURCE_DB',
>         }
>
> and then referencing that dictionary when inspecting the environment:
>
>     for key in config.keys():
>         # ...
>         environ_name = config_env_names[key]
>         environ_value = os.environ.get(environ_name)
>         if environ_value is not None:
>             config[key] = environ_value
>         #...

Hmmm...
I kinda think your excellent points are more in the realm of policy
than mechanism.
What I was going for was to assert that there a designated section (of
many possible ones)
in a .conf file that represents the set of possible program inputs,
and then
offering an example of letting environment and command line arguments
override that
.conf section.
Your points for reducing collision are well taken.  Possibly having a
removable prefix
(which could be a "magic" .conf entry) would allow for a de-conflictor
prefix like
MY_PROGRAM_REALLY_ROCKSsource_db without having to propagate such an
eyesore throughout
the program code.
In any case, it stands as a fun little worked example.
R,
C


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:47:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:47:06 -0300
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
Message-ID: <op.ua29kscgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:06:09 -0300, gsal <salgerman at gmail.com> escribi?:

> There does not seem to be a valid url for the Installer, anywhere.
> Could anyone provide me with a copy of it?

I think py2exe is its successor: http://www.py2exe.org/

-- 
Gabriel Genellina



From jurgenex at hotmail.com  Fri May  9 01:45:21 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Fri, 09 May 2008 05:45:21 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <9vo724prqd0etqlraapsv8e3j6bcigh5ea@4ax.com>

"Waylen Gumbal" <wgumgfy at gmail.com> wrote:
>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 

You seem so have failed to grasp the concept of why Usenet is divided
into separate groups in the first place.

>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.

By your argument there is no need for individual groups in the first
place. We could just as well use a single "HereGoesEverything" and just
skip over those topics that we so dislike.

jue


From pecora at anvil.nrl.navy.mil  Sat May  3 11:24:13 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 03 May 2008 11:24:13 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
	<A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>
Message-ID: <pecora-D066F9.11241203052008@ra.nrl.navy.mil>

In article <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d at visi>,
 Grant Edwards <grante at visi.com> wrote:

> On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> > On Sat, 03 May 2008 00:44:00 +1000
> > Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> >> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> >> > As someone else pointed out, not all the world is Linux.
> >> 
> >> It's a good thing I've never implied such to be the case.
> >
> > You haven't *said* it but you have definitely *implied* it.
> > Installing Python in /usr/bin is not common.
> 
> It is common.  That's where it's installed by almost all Linux
> distributions.

MacOS X system python (or links to them) is in the same place.

-- 
-- Lou Pecora


From larry.bates at websafe.com`  Thu May 22 18:51:39 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 17:51:39 -0500
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>

cm_gui wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
> 
> I've yet to see a web application written in Python which is really
> fast.

You are just dead wrong about this.  Bad programmers will write slow software in 
any language.  There are some HUGE sites using Zope.  I think much of Google's 
software is written in Python.  I have programs that have surprised me with 
their speed.  If your Python program is slow, you have almost assuredly 
approached it with a wrong method or algorithm.  www.websafe.com is completely 
written in Python and we support thousands of users uploading data 
simultaneously at wire speed (and that includes AES-256 encryption on our end).

-Larry


From ivan.illarionov at gmail.com  Mon May 26 18:00:18 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:00:18 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
Message-ID: <g1fbti$2cld$1@news.mtu.ru>

On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:

> Thanks!
> Anyone know which library should i learn then?

Looks like you need to dive into Win32 API
http://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspx
http://msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
and others
combined with ctypes.

Ivan


From jstucklex at attglobal.net  Tue May 27 21:47:55 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 21:47:55 -0400
Subject: php vs python
In-Reply-To: <g1icn8$r5$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru> <g1icn8$r5$1@news.mtu.ru>
Message-ID: <-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

Not for a good programmer.  Only for half-assed ones.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From davidj411 at gmail.com  Thu May 15 16:25:33 2008
From: davidj411 at gmail.com (davidj411)
Date: Thu, 15 May 2008 13:25:33 -0700 (PDT)
Subject: FTP upload issue
Message-ID: <44eede8c-05b5-441d-9207-210074e55f8f@f36g2000hsa.googlegroups.com>

I am having difficulty uploading a text file using Python 2.5 on MAC
OSX.

SCRIPT

filename='/tmp/mac.info2.txt'
fh=open(filename,'w')
fh.write('yes, i have a mac but don't hold that against me - just
example data')
fh.close()


from ftplib import FTP
'host, username, and password are string variables that have already
been defined.
ftp = FTP(host)
ftp.login(username,password)
'so far, logged in, all is well , error is on next line.

ftp.storlines("STOR" + filename, file(filename))
ftp.quit()

What am i doing wrong?  the file DOES exist, the path is correct, and
the file  was closed after being written. file(filename) should open
it again for the upload?

http://www.python.org/doc/lib/ftp-objects.html says that the command
should be an appropriate "STOR" command: "STOR filename". file is an
open file object which is read...


ERROR
  File "mac.inventory.py", line 44, in <module>
    ftp.storlines("STOR " + filename, file(filename))
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 437, in storlines
    conn = self.transfercmd(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 356, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 550 /tmp/mac.info2.txt: The system cannot find the
path specified.




From ivan.illarionov at gmail.com  Sun May 11 22:33:41 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 02:33:41 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <g08aa5$2i0m$1@news.mtu.ru>

On Sun, 11 May 2008 18:52:48 -0700, Carl Banks wrote:

> On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> In such cases, the name 'dummy' is conventionally bound to the items
>> from the iterator, for clarity of purpose::
>>
>>     for dummy in range(10):
>>         # do stuff that makes no reference to 'dummy'
> 
> Is this documented?  I've never heard of this convention.  It's not PEP
> 8, and I've never seen consistent usage of any name.  I'd be interested
> in knowing where you read that this was a convention, or in what
> subcommunities it's a convention in.
> 
> I think dummy is a terrible name to use for this, since in no other
> usage I can think of does the word "dummy" suggest something isn't used.
>  In fact, quite the opposite.  For example, the dummy_threads module is
> most definitely used; the word dummy means that it's stripped down. 
> Based on that, your usage of the symbol dummy above would suggest to me
> that it's a value used in lieu of something else (such as a calculated
> value).
> 
> In mathematics, a dummy argument another name for the independent
> variable of a function (or more accurately, the symbol used to represent
> it), which also doesn't match your usage.
> 
> If a value isn't used, then I think the most clear name for it is
> "unused".
> 
> 
> Carl Banks

I agree with Carl. This group is the only place I've heard about this 
convension and it looks terrible IMO. Even if a value is not used, the 
variable still has a meaning: it is a counter, or an index.

I know about the other convention: "for i in xrange" or "for i in range".
Wikipedia agrees with me:
http://en.wikipedia.org/wiki/For_loop
Examples in wikipedia article use either "i" or "counter".

It is established convention in almost every programming language and its 
origins are in mathematics (matrix indices).

Google search for "for dummy in range" (with quotes) gives 164 results
While "for dummy in range" gives 146 000 results. Almost thousand times 
more.

So, "i" is more conventional and as such is more readable.

-- Ivan


From torriem at gmail.com  Sat May 24 22:09:13 2008
From: torriem at gmail.com (Michael L Torrie)
Date: Sat, 24 May 2008 20:09:13 -0600
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>	<mailman.1532.1211644302.12834.python-list@python.org>	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
Message-ID: <4838CA49.7000705@gmail.com>

David wrote:
> Seriously, 10 hours of testing for code developed in 10 hours? What
> kind of environment do you write code for? This may be practical for
> large companies with hordes of full-time testing & QA staff, but not
> for small companies with just a handful of developers (and where you
> need to borrow somone from their regular job to do non-developer
> testing). In a small company, programmers do the lions share of
> testing. For programmers to spend 2 weeks on a project, and then
> another 2 weeks testing it is not very practical when they have more
> than one project.

Watch your programmers then.  They do have to write and debug the code.
 And they will spend at least as much or more time debugging as writing
the code.  It's a fact.  I have several programmers working for me on
several projects.  What you have been told is fact.  In my experience
it's 3-10x more time debugging as programming.  I've heard that *good*
programmers write, on average, 10 new lines of code per day.  I can also
verify that this is pretty accurate, both in my own programming
experience, and watching programmers working for me.


From castironpi at gmail.com  Thu May  8 19:49:25 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:49:25 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.818.1210289857.12834.python-list@python.org>
Message-ID: <cd1a1f7d-4ff8-4f18-80ef-45e0fd1cf690@m3g2000hsc.googlegroups.com>

On May 8, 6:10?pm, Nicolas Dandrimont <nicolas.dandrim... at gmail.com>
wrote:
> * wxPytho... at gmail.com <wxPytho... at gmail.com> [2008-05-08 15:54:42 -0700]:
>
> > Have a look at this:
>
> > >>> -123**0
> > -1
>
> > The result is not correct, because every number (positive or negative)
> > raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
>
> > The problem is that Python parses -123**0 as -(123**0), not as
> > (-123)**0.
>
> And why is this a problem ? It is the "standard" operator precedence
> that -123^0 is -(123^0), isn't it ?
>
> > I suggest making the Python parser omit the negative sign if a
> > negative number is raised to the power of 0. That way the result will
> > always be a positive 1, which is the mathematically correct result.
>
> That's what it does :
>
> >>> -123**0
> -1
> >>> (-123)**0
>
> 1
>
> > This is a rare case when the parser is fooled, but it must be fixed in
> > order to produce the correct mathematical result.
>
> Again, the mathematical result is correct. -123^0 is -(123^0), not
> (-123)^0.
>
> Regards,
> --
> Nicolas Dandrimont
>
> ?signature.asc
> 1KDownload

Signs include power.

>>> -2**0
-1
>>> (-2)**0
1
>>> -(2**0)
-1

+x, -x Positive, negative
~x Bitwise not
** Exponentiation

from Help;

However:

>>> 2+3**1
5
>>> 2+3**2
11

So, the order of precedence table has not listed the identical order
of operations with the implementation.

I have hit parentheses in rolling too.

In terms of money, processor-based operations may not be equals.
Clock cycles cost fractions of time.  But, I don't see x= -x in realty.


From gagsl-py2 at yahoo.com.ar  Mon May  5 01:04:53 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:04:53 -0300
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
	<15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>
Message-ID: <op.uan0efpvx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 17:01:15 -0300, lev <levlozhkin at gmail.com> escribi?:

>> * Change indentation from 8 spaces to 4
>     I like using tabs because of the text editor I use, the script at
> the end is with 4 though.

Can't you configure it to use 4 spaces per indent - and not use "hard" tabs?

>> * Remove useless "pass" and "return" lines
>     I replaced the return nothing lines with passes, but I like
> keeping them in case the indentation is ever lost - makes it easy to
> go back to original indentation

I can't think of a case when only indentation "is lost" - if you have a crash or something, normally you lose much more than indentation... Simple backups or a SCM system like cvs/svn will help. So I don't see the usefulness of those "pass" statements; I think that after some time using Python you'll consider them just garbage, as everyone else.

>> * Temporarily change broken "chdir" line
>     removed as many instances of chdir as possible (a few useless ones
> to accomodate the functions - changed functions to not chdir as much),
> that line seems to work... I made it in case the script is launched
> with say: 'python somedir\someotherdir\script.py' rather than 'python
> script.py', because I need it to work in it's own and parent
> directory.

You can determine the directory where the script resides using

import os
basedir = os.path.dirname(os.path.abspath(__file__))

This way it doesn't matter how it was launched. But execute the above code as soon as possible (before any chdir)

>     checksums = open(checksums, 'r')
>     for fline in checksums.readlines():

You can directly iterate over the file:

     for fline in checksums:

(readlines() reads the whole file contents in memory; I guess this is not an issue here, but in other cases it may be an important difference)
Although it's perfectly valid, I would not reccomend using the same name for two different things (checksums refers to the file name *and* the file itself)

>     changed_files_keys = changed_files.keys()
>     changed_files_keys.sort()
>     missing_files.sort()
>     print '\n'
>     if len(changed_files) != 0:
>         print 'File(s) changed:'
>         for key in changed_files_keys:

You don't have to copy the keys and sort; use the sorted() builtin:

     for key in sorted(changed_files.iterkeys()):

Also, "if len(changed_files) != 0" is usually written as:

     if changed_files:

The same for missing_files.

>         for x in range(len(missing_files)):
>             print '\t', missing_files[x]

That construct range(len(somelist)) is very rarely used. Either you don't need the index, and write:

for missing_file in missing_files:
     print '\t', missing_file

Or you want the index too, and write:

for i, missing_file in enumerate(missing_files):
     print '%2d: %s' % (i, missing_file)

> def calculate_checksum(file_name):
>     file_to_check = open(file_name, 'rb')
>     chunk = 8196

Any reason to use such number? 8K is 8192; you could use 8*1024 if you don't remember the value. I usually write 1024*1024 when I want exactly 1M.

-- 
Gabriel Genellina



From mnordhoff at mattnordhoff.com  Sun May 11 21:54:44 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Mon, 12 May 2008 01:54:44 +0000
Subject: python without while and other "explosive" statements
In-Reply-To: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
References: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>
Message-ID: <4827A364.9040507@mattnordhoff.com>

ivo talvet wrote:
> Hello,
> 
> Is it possible to have a python which not handle the execution of
> "while", "for", and other loop statements ? I would like to allow
> remote execution of python on a public irc channel, so i'm looking for
> techniques which would do so people won't be able to crash my computer
> (while 1: os.fork(1)), or at least won't won't freeze my python in a
> infinite loop, make it unresponsive. Is there a compiling option (or
> better, something i can get with apt-get cos i think compiling myself
> and handle all the metastuff myself is somehow dirty) for have a
> "secure python" (you can guess what i mean by "secure" in my case) or
> must i touch myself the source disable some code lines ? If last
> solution, which modifications in which files should i do ? (sorry for
> my bad english)
> 
> Thanks.
> 
> Ivo

<http://codepad.org/> is a pastebin-like website that lets people upload
code in a dozen different languages, and it runs it. They have info up
about how it's secure at <http://codepad.org/about>.

I'm pretty sure there's another similar website that's specific to
Python, but I can't remember it. Anyway, it was similar, using virtual
machines, a firewall, and killing stuff that ran for longer than 20
seconds, IIRC.

(Thanks for the link to codepad, habnabit.)
-- 


From zapwireDASHgroups at yahoo.com  Fri May 23 15:40:04 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Fri, 23 May 2008 12:40:04 -0700
Subject: Reloading function obtained via 'from xxx import yyy'
Message-ID: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>

How do I get Python to correctly re-load this function definition?

In test.py:

def testFunc():
    print 'My testFunc!'

I execute...

>>> from test import testFunc
>>> testFunc()
My testFunc!

Fine... now I change test.py to:

def testFunc():
    print 'Modified testFunc!'

...and I'd like to reload testFunc.  How do I do so?  'from test import 
testFunc' keeps the old definition around, and 'reload test' of course doesn't 
work becayse I didn't use 'import test' in the first place.

Thanks for the help,
---Joel





From aisaac at american.edu  Thu May  8 10:26:55 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 14:26:55 GMT
Subject: observer pattern question #1 (reference to subject)
Message-ID: <P4EUj.24095$zw.1789@trnddc04>

I have two questions about the "observer pattern" in Python.

This is question #1.  (I'll put the other is a separate post.)



Here is a standard example of the observer pattern in Python:



http://en.wikipedia.org/wiki/Observer_pattern



Contrast with this rather standard discussion:



http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1



The difference I am focusing on is that in the latter,

the observer (investor) maintains a reference to the

subject (stock).  

(Many questions can be raised of course: see the discussion at

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/131499).



Is anything lost by not maintaining this reference (other 

than error checking ...)?  If I feel the observer needs 

access to the subject, what is wrong with just having the 

subject pass itself as part of the notification?



Thank you,

Alan Isaac




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Message-ID: <e40751d7-b8d2-4529-81cb-f848b72bc824@b5g2000pri.googlegroups.com>

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From myshelter at gmail.com  Sun May  4 07:59:53 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 04:59:53 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com>
Message-ID: <05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>

On May 4, 12:18 pm, s0s... at gmail.com wrote:
> On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > I had previously ran the import line. I prepended it to the example
> > code I'm trying to run every time but it did not help, still nothing
> > happens. With or without var before 'root'. I'm pasting the code in
> > IDLE and using Windows XP as written in the first post.
>
> Tkinter doesn't work if you type the statements in IDLE. I don't
> remember the specifics of it, but essentially it doesn't work because
> IDLE is itself a Tkinter app. You have to type it at the Python
> command line or save it in a file. BTW, if you're on Windows, you
> should definitely check wxPython. I used to work with Tkinter,
> struggling with it all the time only to get a lame result most of the
> time. Then I switched to wxPython, and in the same week I was learning
> it I did a better GUI than I ever did in Tkinter (with months of
> work!). I feel it makes it easier to make your program have a better
> structure and design, and thus lets you focus on the actual task of
> the program, rather than in the GUI itself. Plus, on Windows, you'll
> get the widgets to look more natively, like any good quality
> application there is on Windows.

Ah, but is it cross platform?

(Thanks for letting me know about IDLE.)


From kyosohma at gmail.com  Wed May  7 09:01:24 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 06:01:24 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
Message-ID: <bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>

On May 7, 6:12?am, pistacchio <pistacc... at gmail.com> wrote:
> hi! i'm a php user and a python programmer. i'd love to use python for
> my server side needs but i can't seem to find what i'm looking for. for
> most of my php work i use mysql and tinyButStrong
> (http://www.tinybutstrong.com) which is a very lightweight template
> engine that offers powerful functionalities. you insert TBS tags in web
> pages like:
>
> <div align="center" class="title-page"> [var.x] </div>
>
> and it replaces [var.x] with the value of global variable x. it also
> makes blocks (and nested blocks) easy to implement:
>
> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
> [blk1;block=end] </p>
>
> in the previous code it cycles throu all the values of the array blk1.
>
> it does many more things, like htlm escaping, url and js encoding etc,
> conditional displaying etc, but it is not more confusing that inserting
> pieces of code into the HTML (aka: littering the code and kissing
> goodbye to the code/presentation separation). it comes in the form of a
> single file with a single class that you can easily include in the code
> and go.
>
> now, i've searched the net and it seems full of python-based frameworks
> for doing server side scripting and templating, but none that suits my
> needs.
>
> ? ? 1. i like writing code and i like control. i mean, open up the
> simplest text editor and write in it. i don't want something that is
> command-line driven or that writes code for me like ">>>
> makePagesFromThisDatabase()".
> ? ? 2. i want something very lightweight. i don't want dozen of options,
> pre-made blogging parts ecc. i just need a good non invasive template
> engine and the basic functions for server side scripting, like session
> managing, request parsing, functions to manipulate html code (encodings etc)
> ? ? 3. i don't want to beg my hosting provider to install the libraries.
> a simple include file should do the work.
> ? ? 4. object oriented programming is not required (better: i prefer
> plain old procedural programming).
>
> any help? thanks in advance

Did you look at TurboGears or Django? TG uses Kid in the 1.x series
and Genshi in 2.x (I think) for templating purposes. There's also
Cheetah, one of the more powerful Python templating engines out there.

http://genshi.edgewall.org/
http://www.kid-templating.org/
http://www.cheetahtemplate.org/
http://turbogears.org/

Maybe those links will get you going.

Mike


From ndbecker2 at gmail.com  Wed May 21 12:48:59 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 12:48:59 -0400
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
	<5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>
Message-ID: <g11jpq$gr9$1@ger.gmane.org>

marek.rocki at wp.pl wrote:

> Neal Becker napisa?(a):
>> In an earlier post, I was interested in passing a pointer to a structure
>> to fcntl.ioctl.
>>
>> This works:
>>
>> c = create_string_buffer (...)
>> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
>> err = fcntl.ioctl(eos_fd, request, args)
>>
>> Now to do the same with ctypes, I have one problem.
>>
>> class eos_dl_args_t (Structure):
>>     _fields_ = [("length", c_ulong),
>>                 ("data", c_void_p)]
>> ...
>> args = eos_dl_args_t()
>> args_p = cast(pointer(args), c_void_ptr).value
>> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>>
>> That last may fail, because .value creates a long int, and ioctl needs a
>> string.
>>
>> How can I convert my ctypes structure to a string?  It _cannot_ be a
>> c-style 0-terminate string, because the structure may contain '0' values.
> 
> Hello. I'm not completely sure what your problem is ("may fail" is not
> a good description. Does it fail or does it not?). 

May fail is exactly what I meant.  As written, ioctl will accept a 3rd arg
that is either a string or int.  In this case, it is int.  If the address
fits in an int it works, but if the address (which is a long) doesn't fit
it fails (gives an overflow error).  Seems to be random (as well as
platform dependent).




From afrobeard at gmail.com  Thu May 29 07:24:55 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 29 May 2008 04:24:55 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
	<b0fc1a8b-98c0-4bbf-9afb-cf5741eae1f6@t54g2000hsg.googlegroups.com>
Message-ID: <bc253c34-64ad-49a1-9d47-e3dcc2f1ae26@i76g2000hsf.googlegroups.com>

Another way of doing this might be to use the module difflib to
calculate the differences. It has a sequence matcher under it which
has the function get_matching_blocks

difflib is included with python.


On May 29, 2:02?pm, Chris <cwi... at gmail.com> wrote:
> On May 29, 10:36?am, loial <jldunn2... at googlemail.com> wrote:
>
> > I have a requirement to compare 2 text files and write to a 3rd file
> > only those lines that appear in the 2nd file but not in the 1st file.
>
> > Rather than re-invent the wheel I am wondering if anyone has written
> > anything already?
>
> How large are the files ? You could load up the smallest file into
> memory then while iterating over the other one just do 'if line in
> other_files_lines:' and do your processing from there. ?By your
> description it doesn't sound like you want to iterate over both files
> simultaneously and do a line for line comparison because that would
> mean if someone plonks an extra newline somewhere it wouldn't gel.



From daveparker at flamingthunder.com  Tue May 13 10:05:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 07:05:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<3d8cb22c-5b5a-49c1-9ee0-9c09ed91106a@k37g2000hsf.googlegroups.com>
Message-ID: <fb6f276c-24f9-4339-b814-5f2c4f331c59@l17g2000pri.googlegroups.com>

On May 13, 7:44?am, castiro... at gmail.com wrote:
> I am not convinced that the colorspace occupies three dimensions necessarily.

Apparently there are some people -- called tetrachromats -- who can
see color in four dimensions.  They have extra sets of cones in their
retinas containing a different photopigment.  So, the dimensions of
color appear to be an artifact of our visual systems, and not inherent
in the colors themselves which are linear (one-dimensional) in
frequency.  http://en.wikipedia.org/wiki/Tetrachromacy


From hdante at gmail.com  Mon May 19 21:13:52 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:13:52 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
Message-ID: <a510fda7-8ae8-4a92-ac5f-62edf8a966d7@z72g2000hsb.googlegroups.com>

On May 19, 5:25?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> There's at least one (possibly incomplete) C interpreter. FWIW, it
> would not be harder (and possibly simpler) to write a byte-code+VM
> based C implementation than it is to write CPython, Jython or

 You may (right now, readily, without experimental software) compile C
to, for example, llvm bytecode, interpret it in the VM, JIT-compile
it, native-compile it, etc. There's also experimental support for
compiling C to the JVM.

 Notice that you usually want to optimize C code, so it will be harder
than writing a python interpreter.

> IronPython. The point is that it's just useless - C is a (very) low-

 It's not useless. Consider that you may distribute your C application
in byte-code instead of native code and during the installation
process, it is native compiled and optimized exactly to your
architecture (like a better "Gentoo", with the compilation split
between you and the user).

> point is that, given Python's (as a language) extrem dynamism,
> compiling it to native code wouldn't buy you much in terms of raw
> performances. The problem is not with writing a native-code
> compiler[1}, but with writing an *optimising* native-code compiler.

 That's the job of pypy folks. And they are getting there. They use a
python subset, called RPython:

 http://morepypy.blogspot.com/2008/01/rpython-can-be-faster-than-c.html
 (note: the test in the site compares garbage collection speed)

 BTW, here's how to compile RPython to (optimized) native code:
 http://codespeak.net/pypy/dist/pypy/doc/standalone-howto.html

 And here is the document that talks about all that:
 http://codespeak.net/pypy/dist/pypy/doc/dynamic-language-translation.html

> I'm not trying to "trivialize" anything. I'm just getting fed up with
> this "Python is an interpreted and therefore slow language" non-
> sense. ?Python is a language, and as such is neither slow nor fast nor

 I'm sorry for creating all those offtopic posts. I feel so ashamed :-
(. Well, not really. :-P

 My suggestion was to use code suitable for optimization (not
considering things that you'd need to worry about the way you write
code, like RPython, or psyco). That's all. :-)


From bignose+hates-spam at benfinney.id.au  Tue May  6 07:06:49 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 06 May 2008 21:06:49 +1000
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
Message-ID: <874p9belo6.fsf@benfinney.id.au>

"Wojciech Walczak" <wojtek.gminick.walczak at gmail.com> writes:

> 2008/5/6, Banibrata Dutta <banibrata.dutta at gmail.com>:
> >  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
> >
> >  So why not put symlink to Python over there on all machines, if
> >  we can put one (or env itself) there ?
> 
> To avoid linking all the rest of interpreters like perl, ruby, lua
> and dozens of others.

The argument was being made from "thousands of scripts". Isn't "dozens
of symlinks" better?

-- 
 \      "It is difficult to get a man to understand something when his |
  `\             salary depends upon his not understanding it." ?Upton |
_o__)                                                   Sinclair, 1935 |
Ben Finney


From fetchinson at googlemail.com  Wed May  7 16:49:09 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 7 May 2008 13:49:09 -0700
Subject: Idea for P3K
In-Reply-To: <4821fea4$0$880$ba4acef3@news.orange.fr>
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <fbe2e2100805071349g784e38eal3db0829c37bc3269@mail.gmail.com>

> > I don't often feel like using this word
>
> Look at languages like OCAML or F #
>

I looked at OCAML and F#. Now what?

Cheers,
Daniel


From nobody at yahoo.com  Thu May 22 19:57:07 2008
From: nobody at yahoo.com (Andrew)
Date: Thu, 22 May 2008 23:57:07 GMT
Subject: Tun/Tap Driver using OpenVPN and DeviceIoControl
Message-ID: <nLnZj.3620$Yp.2489@edtnps92>

Hello I am trying to port some code and I am running into some issues I 
may or may not be able to solve on my own and would appreciate your help

Basically I am trying to open the Tun Driver through openvpn in Ether 
(Tap mode).

code is as follows

f = win32file.CreateFile("C:\\WINDOWS\\System32\\drivers\\tunmp.sys", 
GENERIC_READ, 0, None, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
if WINDOWS:
         ifs = win32file.DeviceIoControl(f, TUNSETIFF, 
struct.pack("16sH", "wj%d", TUNMODE), 0, None)
else:
         ifs = ioctl(f, TUNSETIFF, struct.pack("16sH", "wj%d", TUNMODE))
ifname = ifs[:16].strip("\x00")
print "Interface %s created. Configure it and use it" % ifname

but does not seem to work so well I get "The Paramater is incorrect"

Traceback (most recent call last):
   File "wifi.py", line 167, in <module>
     ifs = win32file.DeviceIoControl(f, TUNSETIFF, struct.pack("16sH", 
"wj%d", TU
NMODE), 0, None)
pywintypes.error: (87, 'DeviceIoControl', 'The parameter is incorrect.')


Would appreciate any help

Ty


From samslists at gmail.com  Wed May 21 02:36:21 2008
From: samslists at gmail.com (samslists at gmail.com)
Date: Tue, 20 May 2008 23:36:21 -0700 (PDT)
Subject: Running programs under a python program...
Message-ID: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>

So I have a python program that runs a bunch of other programs....it
then loops forever, occasionally executing other programs.

To run each of these programs my python code executes:
subprocess.Popen(command_line, shell=True, stdout=fd,
stderr=subprocess.STDOUT)

where command_line is an appropriate command line.  :)

Now my problem is when I abort this program it kills off all the child
processes I've started. In this case I don't want that.   How can I
stop the child processes from dieing when I kill off the parent?

Thanks!


From gaojihuiyuan at yahoo.cn  Thu May 15 14:14:55 2008
From: gaojihuiyuan at yahoo.cn (gaojihuiyuan)
Date: Thu, 15 May 2008 11:14:55 -0700 (PDT)
Subject: Computer
Message-ID: <b9771c23-7119-4f8f-8387-b54f6a7197aa@f24g2000prh.googlegroups.com>

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From marco at sferacarta.com  Tue May  6 05:12:46 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 06 May 2008 11:12:46 +0200
Subject: Decimal vs Float comparasion
In-Reply-To: <e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>
References: <mailman.625.1210045932.12834.python-list@python.org>
	<e0a172e3-cae3-4273-beb2-a376b7a3cd9a@a23g2000hsc.googlegroups.com>
Message-ID: <kiVTj.33119$o06.31178@tornado.fastwebnet.it>

Gasto wrote:

> I still don't see why such a module exists.

There are 2.0 types of programmers: those who always use floating point,
and those who know how to use them.


From sjmachin at lexicon.net  Sat May 10 21:49:28 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 11 May 2008 01:49:28 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <482650a5$1@news.mel.dft.com.au>

globalrev wrote:
> http://reddit.com/r/programming/info/18td4/comments
> 
> claims people take a lot of time to write a simple program like this:
> 
> 
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
> 
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
> 
> 
> is there a better way than my solution? is mine ok?

Try doing it using %3 and %5 only once each.


From george.sakkis at gmail.com  Fri May 16 12:30:49 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 16 May 2008 09:30:49 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>

On May 16, 11:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?

Please don't feed the bots.





From nospam at nospam.invalid  Wed May 28 23:19:24 2008
From: nospam at nospam.invalid (Rahul)
Date: Thu, 29 May 2008 03:19:24 +0000 (UTC)
Subject: adding tkinter support on an existing python installation
Message-ID: <Xns9AACE315DDF796650A1FC0D7811DDBC81@85.214.90.236>

'import _tkinter'  fails on my system. I wanted to enable tk support. I do 
have tk and tk-devel installed (but they weren't around when we installed 
python). What's the best way to get these modules into python? I hope I do 
not have to reinstall python itself? Or do I?

-- 
Rahul


From arnodel at googlemail.com  Tue May 20 12:50:31 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 17:50:31 +0100
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<m2tzgt6m4n.fsf@googlemail.com>
	<86e5f3b2-d1ae-414f-976e-062e7a293c9b@25g2000hsx.googlegroups.com>
Message-ID: <m2prrg7wdk.fsf@googlemail.com>

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 20, 10:17?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
[...]
>> <split hairs>
>> Isn't
>>
>> ? ? c not in seen and (seen.add(c) or True)
>>
>> the same as
>>
>> ? ? seen.add(c) or c not in seen
>>
>> ?
>>
>> > ? ? return ''.join(new)
>>
>> (notice I haven't closed the tag!)
>>
>> --
>> Arnaud- Hide quoted text -
>>
>> - Show quoted text -
>
> Unfortunately, no.  "seen.add(c) or c not in seen" will never return
> true, since c gets added to seen before testing if c in seen.
>
> -- Paul

Ha you're right of course.  But I haven't closed the tag yet, so:

    c not in seen and (seen.add(c) or True)

is definitely the same as

    c not in seen and not seen.add(c)

which is

    not (c in seen or seen.add(c))

:)

</split hairs>

-- 
Arnaud


From ganeshborse at gmail.com  Fri May  9 09:34:02 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Fri, 9 May 2008 06:34:02 -0700 (PDT)
Subject: how to pass C++ object to another C++ function via Python 
	function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
	<136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>
	<mailman.484.1209763450.12834.python-list@python.org>
Message-ID: <91e5ada4-09bb-488a-a175-762a83daf658@f24g2000prh.googlegroups.com>

Yes, that worked. I "protected" the variable which I did not want to
get freed. I incremented reference for that variable & it started
working.

Thanks for all your guidance.

On May 3, 5:23?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> Python will do nothing with the pointer inside a PyCObject - unless you ?
> want to, and pass a cleanup function as the second argument to the ?
> PyCObject constructor.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -



From ivan.illarionov at gmail.com  Sun May 25 20:47:00 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 00:47:00 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
Message-ID: <g1d1a4$1rpd$2@news.mtu.ru>

Jerry Stuckle wrote:

> As I've said before - good programmers can write good code in any
> language.

Yes, they can. But it may be harder to do for them in one language and 
easier in another.

Ivan


From sjmachin at lexicon.net  Sat May 24 19:28:55 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 23:28:55 GMT
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01"
	in  python coding?
In-Reply-To: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <4838a4b4$1@news.mel.dft.com.au>

zxo102 wrote:
> Hi,
>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?

If by "in python coding" you mean "in Python source code", then just 
type it in with \x in front of each pair of hex digits, like you did above.

However if you mean e.g. how to change a data string x into a data 
string y, something like this is what you want

 >>> import binascii
 >>> x = 'ED 6F 3C 01'
 >>> y = binascii.unhexlify(x.replace(' ', ''))
 >>> y
'\xedo<\x01'

... which is correct ('o' == '\x6f' and '<' == '\x3c'); see below:

 >>> ' '.join(['%02x' % ord(c) for c in y])
'ed 6f 3c 01'
 >>>> len(y)
4

Does (len(y) == 4) surprise you?

> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.

It's rather difficult to guess what you mean here ... insert how many 
'\x'? where?? what gave you the error information??? Consider showing us 
a copy/paste of exactly what you did and what was the response, like I 
did above.


HTH,
John


From castironpi at gmail.com  Wed May  7 20:05:25 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:05:25 -0700 (PDT)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
	<482214BE.4040702@islandtraining.com>
	<mailman.727.1210196161.12834.python-list@python.org>
Message-ID: <543e6dfe-7414-4a4a-8c9c-5b04fe815b02@f36g2000hsa.googlegroups.com>

On May 7, 4:03?pm, Joel Bender <j... at cornell.edu> wrote:
> > Python 3.0 has such a formatting operation, but Python 2.x does not. ?
> > However it's not hard to write.
>
> Indeed. ?Refraining from using named lambdas:
>
> ? ? ?>>> def bin(x):
> ? ? ?... ? ? return ''.join(x & (1 << i) and '1' or '0' for i in
> ? ? ?... ? ? ? ? range(7,-1,-1))
> ? ? ?...
> ? ? ?>>> bin(12)
> ? ? ?'00001100'
> ? ? ?>>> bin(63)
> ? ? ?'00111111'
>
> It would be nice to have str(x, 2) like int(x, 2), but there are bigger
> fish in pond.

+1 str( x, base ) +1


From brad at 16systems.com  Thu May 22 21:15:14 2008
From: brad at 16systems.com (Brad)
Date: Thu, 22 May 2008 21:15:14 -0400
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <g155s7$htk$1@solaris.cc.vt.edu>

George Maggessy wrote:
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python. So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern. I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? ...

Yes. Python does not impose design patterens onto developers. Pick your 
poison. It is somewhat OOP, but allows for other development paradigms 
as well... rather like C++ IMO although a bit more OOP focused.

Best of luck,

Brad


From badmuthahubbard at gmail.com  Sun May  4 06:04:20 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sun, 4 May 2008 13:04:20 +0300
Subject: Please help - Tkinter not doing anything
In-Reply-To: <3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com>
Message-ID: <8200bab70805040304y2a33e116l1454f75c80ea956b@mail.gmail.com>

Try adding:

from Tkinter import *

at the beginning, and you don't need "var" in front of root=Tk(), just
"root = Tk()"   (<-without the quotes of course)
What OS are you on?  Are you running "python testapp.py" or similar to
make it run?

-Chuckk

On Sun, May 4, 2008 at 12:39 PM, Protected <protected at myshelter.net> wrote:
> Good thinking. It was indented with spaces, so I replaced them with tabs.
> Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
> code in two parts (with the second one beginning in that line) and run them
> separately, I get no errors, but still nothing happens.
>
> class Application(Frame):
>     def say_hi(self):
>         print "hi there, everyone!"
>
>     def createWidgets(self):
>         self.QUIT = Button(self)
>         self.QUIT["text"] = "QUIT"
>          self.QUIT["fg"]   = "red"
>         self.QUIT["command"] =  self.quit
>
>         self.QUIT.pack({"side": "left"})
>
>         self.hi_there = Button(self)
>          self.hi_there["text"] = "Hello",
>         self.hi_there["command"] = self.say_hi
>
>         self.hi_there.pack({"side": "left"})
>
>     def __init__(self, master=None):
>          Frame.__init__(self, master)
>         self.pack()
>         self.createWidgets()
>
> var root = Tk()
> app = Application(master=root)
> app.mainloop()
> root.destroy()
>
> On Sun, May 4, 2008 at 12:33 PM, Q4 <q4 at invalid.com> wrote:
>
> > On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshelter at gmail.com>
> > wrote:
> >
> >
> >
> > > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > > some Tkinter examples, including the one from the library reference,
> > > but they don't seem to do anything! Shouldn't there be, like, a
> > > dialog?
> > >
> > > I'm running Windows XP and using IDLE. You can assume my version of
> > > Python is the latest.
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
> > If you just copy the code from the python doc the indentation might be
> > broken.
> > Send the code and I'll take a look at it.
> >
> > Do you get any errors?
> >
> > --
> > My website:
> >  http://www.riddergarn.dk/koder/
> >
> >
>
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From hdante at gmail.com  Mon May 19 12:11:40 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 09:11:40 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
Message-ID: <62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>

On May 19, 7:03?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Vicent Giner a ?crit :
>
> > Hello.
>
> > I am new to Python. It seems a very interesting language to me. Its
> > simplicity is very attractive.
>
> > However, it is usually said that Python is not a compiled but
> > interpreted programming language
>
> cf my answer to you and Henrique on this.
>
> > I am working on my PhD Thesis, which is about Operations Research,
> > heuristic algorithms, etc., and I am considering the possibility of
> > programming all my algorithms in Python.
>
> > The usual alternative is C, ?but I like Python more.
>
> Then use it.
>
> > The main drawbacks I see to using Python are these:
>
> > * As far as I understand, the fact that Python is not a compiled
> > language makes it slower than C, when performing huge amounts of
> > computations within an algorithm or program.
>
> In which way is this a problem here ? I thought your thesis was about
> algorithm, not about implementation optimisation ? And if it's the
> later, then even C might sometimes be too high level - you should drop
> to assembly language.
>
> > * I don't know how likely it is to find libraries in Python related to
> > my research field.
>
> I can't tell but you'd be surprised by the quantity of available Python
> libs.
>
> > * I know Python is a "serious" and mature programming language, of
> > course. But I do not know if it is seen as "just funny" in a research
> > context. Is Python considered as a good programming language for
> > implementing Operations Research algorithms, such as heuristics and
> > other soft-computing algorithms?
>
> Don't know if this answers your question, but it seems that at least
> some authors consider it a good choice:http://www.oreilly.com/catalog/9780596529321/
>
> All code examples in this books are in Python - very badly written
> Python, alas...
>
> > Maybe this is not the right forum, but maybe you can give me some
> > hints or tips...
>
> Hem... Obviously, most people here will have a little biased, you know ?-)

 I agree with what most people here said, that the language doesn't
really matter, etc., but that simply does not apply to the specific
case of optimization research.

 The little I know about optimization, even trivial problems may be
hairy problems. Na?ve implementations simply don't finish and the
performance bottlenecks are not necessarily in the numeric computation
algorithms (so numpy doesn't help much here). If the guy is doing
research on that, it possible that he will work with thousands (or
millions) of weird constraints.

 I'm pretty sure about that: when the algorithms take 4 hours to test
a single execution, you value processor time.

 The situation would be simpler if there were good well-known toolkits
for optimization in python (like numpy for matrix operations), but
that's not the case.


From jonathan.barbero at gmail.com  Fri May 16 11:33:18 2008
From: jonathan.barbero at gmail.com (Jonathan Barbero)
Date: Fri, 16 May 2008 12:33:18 -0300
Subject: IDE for Python
Message-ID: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>

Hi!

 I?m newbie with Python and to learn it better I want to use a good IDE to
concentrate on Python power. There is any IDE like Eclipse for Java for
Python? If not, what is the best Python?s IDE for you?

 Thanks,

   Jonathan.
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From bellman at lysator.liu.se  Tue May 20 09:56:02 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 13:56:02 +0000 (UTC)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <g0ul9i$hjr$1@news.lysator.liu.se>

Zack <zhalbrecht at gmail.com> wrote:

> There's nothing wrong (that I know of) by doing it as I have up there,
> but is there a simpler, easier way? Looking forward to hearing about
> how much of a n00b I am. Thanks in advance!

You want the defaultdict type:

    import collections
    d = collections.defaultdict(lambda: 0)
    for person in People:
	fav_food = person.fav_food
	d[fav_food] += 1

New in Python 2.5, so if you require older Python versions, you
can't use that.  Note also that this can become slow if most keys
are unique; the function given to defaultdict will be called the
first time a key is mentioned, and if the keys are mostly unique,
that will be the majority of the times, and calling a pure Python
function is fairly slow in CPython.  (It probably won't matter
unless you have many thousands of unique keys, though.)


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"If you ignore performance problems long enough, they   !    bellman @
 somehow seem to go away."          -- Barry A Warsaw   ! lysator.liu.se


From ian.g.kelly at gmail.com  Fri May  9 18:58:08 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Fri, 9 May 2008 16:58:08 -0600
Subject: Property in derived class
In-Reply-To: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
Message-ID: <3fc761710805091558g3a494d2bt54a88364d235bd41@mail.gmail.com>

On Fri, May 9, 2008 at 3:20 PM, Joseph Turian <turian at gmail.com> wrote:
> Could someone demonstrate how to implement the proposed solutions that
> allow the property to be declared in the abstract base class, and
> refer to a get function which is only implemented in derived classes?

One way is to have the property refer to a proxy that performs the
late binding, which might look something like this:

    def _bar(self):
        return self.bar()

    prop = property(fget=_bar)

Another way is to declare properties using something like the
following indirectproperty class.  I haven't thoroughly tested this,
so I don't know whether it works exactly right.

class indirectproperty(object):

    def __init__(self, sget=None, sset=None, sdel=None):
        self.sget = sget
        self.sset = sset
        self.sdel = sdel

    def __get__(self, instance, owner):
        if instance is not None:
            fget = getattr(instance, self.sget)
        else:
            fget = getattr(owner, self.sget)
        return fget()

    def __set__(self, instance, value):
        fset = getattr(instance, self.sset)
        fset(value)

    def __delete__(self, instance):
        fdel = getattr(instance, self.sdel)
        fdel()


class Foo(object):
    def func(self): return "foo"
    callfunc = indirectproperty(sget="func")

class Bar(Foo):
    def func(self): return "bar"


From castironpi at gmail.com  Thu May 15 19:53:24 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:53:24 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
Message-ID: <b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>

On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > On May 15, 3:47 pm, m... at pixar.com wrote:
> >> I'm cleaning up some old code, and want to see what orphan
> >> functions might be sitting around.
>
> >> Is there a static call tree analyzer for python?
>
> > How about
> >http://pycallgraph.slowchop.com/
>
> > ...
> > Jay Graves
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Have you checked to see if PyChecker or pylint can help you?
> Apparently they can find unused variables at least, I don't know
> whether they do functions or not.

I think of dynamic programming and dynamic code, but voice.  Does that
mean sing about it?


From frankdmartinez at gmail.com  Mon May 12 09:16:20 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Mon, 12 May 2008 06:16:20 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com> 
	<ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com> 
	<pan.2008.05.11.07.19.22.159479@virgilio.it>
Message-ID: <1c99de2e-96db-4fd7-8a0e-7f366c32ebb7@56g2000hsm.googlegroups.com>

On May 11, 3:19?am, Francesco Bochicchio <bock... at virgilio.it> wrote:
> But there is not such a thing, in Python. What you have is that A
> has the same attributes/methods of B plus its own.
> What you could do is ?adding in class A a method like this:
>
> ? class A(B):
> ? ? ?...
> ? ? ?def set_b_attributes(self, instance_of_b):
> ? ? ? ? ?for k, value in instance_of_b.__dict__:
> ? ? ? ? ? ? ? ? setattr(self, k, value )
>
> and the use it like this:
>
> ? ?a1.set_b_attributes(b1)

Hi, Francesco.
    Thanx!  That's actually exactly what I needed (though I didn't
know it).


From hdante at gmail.com  Tue May 27 20:56:57 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Tue, 27 May 2008 17:56:57 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <2c41298e-5041-4756-8fc4-c10d165a81b2@b1g2000hsg.googlegroups.com>

On May 26, 3:34?pm, notnorweg... at yahoo.se wrote:
>
> what is the definition of a highlevel-language?
>
 There's no formal definition of high level language. Thus, the
following are true:

 1) You can safely treat it as buzzword
 2) You can't formally define a level hierarchy of languages
 3) You can't formally classify any language as high, low, etc. level
 4) Language theory literature ignore this term, so it's also
irrelevant
 5) You can use it to vaguely criticize a language that you don't like
as being too high/low level :-)
 6) You shouldn't try to label a language as high level or low level
or something else without a context
 7) You probably should ignore this term

 Now we have a problem. How can we define the "easiness" of a
language ?

 I think a good way to do this is simply list the language
architecture/paradigms and philosophy and let the listener decide by
himself if it's an "easy" language or not.

 For a great example, see the description of python at:

 http://www.python.org/about/



From kamhung.soh at gmail.com  Mon May 12 19:53:42 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 09:53:42 +1000
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
	<48284E1C.5050107@bigfoot.com>
Message-ID: <op.ua2fbsnfev04yd@melwxp23>

On Tue, 13 May 2008 00:03:08 +1000, Ricardo Ar?oz <ricaraoz at gmail.com>  
wrote:

> Ville Vainio wrote:
>> On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
>>
>>> All these examples assume your regular expression will not span  
>>> multiple
>>> lines, but this can easily be the case. How would you process the file
>>> with regular expressions that span multiple lines?
>>  re.findall/ finditer, as I said earlier.
>>
>
> Hi, sorry took so long to answer. Too much work.
>
> findall/finditer do not address the issue, they merely find ALL the  
> matches in a STRING. But if you keep reading the files a line at a time  
> (as most examples given in this thread do) then you are STILL in trouble  
> when a regular expression spans multiple lines.
> The easy/simple (too easy/simple?) way I see out of it is to read THE  
> WHOLE file into memory and don't worry. But what if the file is too  
> heavy? So I was wondering if there is any other way out of it. Does grep  
> read the whole file into memory? Does it ONLY process a line at a time?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Standard grep can only match a line at a time.  Are you thinking about  
"sed", which has a sliding window?

See http://www.gnu.org/software/sed/manual/sed.html, Section 4.13

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From vadim.pestovnikov at gmail.com  Thu May  1 11:46:15 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 08:46:15 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
	<675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
	<4819E4AF.4060103@v.loewis.de>
Message-ID: <55b033af-4c84-4e29-9dcd-598e7cde7057@m44g2000hsc.googlegroups.com>

On May 1, 11:41 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > Martin, could you please tell me how to do this, I am pretty new in
> > Solaris.
>
> It's fairly complicated, so I'm not sure I can give you the full
> tutorial in a Usenet message.
>
> In essence, you need to spot the linker line in the build process,
> (e.g. by the -o option to the compiler), and add -lm to it.
>
> If you cannot do this on your own, I recommend you hire somebody
> who can.
>
> Regards,
> Martin

Thanks Martin,
For sure I am not maintainer :).

Thanks for the help and explanations.


From duncan.booth at invalid.invalid  Fri May  2 08:26:50 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 12:26:50 GMT
Subject: no cleanup on TERM signal
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
	<mailman.450.1209722397.12834.python-list@python.org>
Message-ID: <Xns9A9288AF8AE6Cduncanbooth@127.0.0.1>

Christian Heimes <lists at cheimes.de> wrote:

>> res = create_resource()
>> try:
>>    use_resource()
>> finally:
>>    res.close() # Must free resource, but the object can still be
>>    alive... 
> 
> You can replace the try/finally code with a "with resource:
> do_something()" block if the object supporst the context manager
> protocol. 
> 

or replace it with:

 with contextlib.closing(create_resource()) as res:
     do_something()

if the object does not support the context manager protocol.


From larry.bates at websafe.com`  Fri May  9 14:37:44 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 09 May 2008 13:37:44 -0500
Subject: Web Framework suggestions for a RIA type application for managing
	lab  specimens
In-Reply-To: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
References: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
Message-ID: <4rudnZWRbKoYBLnVnZ2dnUVZ_sCtnZ2d@comcast.com>

rynt wrote:
> Hello all.
> 
> I'm Looking for suggestions for which Python web framework(e.g.
> Django, Turbogears,etc.) would work best to develop a cross platform
> browser based system to manage lab specimens.
> 
> Requirements are:
> a. highly secure
> b. run on internet or intranet
> e. RDBMS read/write intensive
> d. be able to work on-line or off-line (with automatic updates to db
> when coming back on-line)
> e. be able to print reports and labels using a variety of
> printers(laser, deskjet, label printers)
> f. have a rich set of desktop-like components
> 
> Perhaps a web based app isn't the way to go.  Arguments for and
> against gratefully accepted.
> 
> Pros and Cons for any frameworks gratefully accepted.
> 
> Perhaps a framework isn't really what's needed here, but a combination
> of different web components and technologies?
> 
> Anyway, I'm grateful for any ideas you may be able to give me.
> 
> Thanks
> Ruben
> 

 > a. highly secure

Can be accomplished with XMLRPC over HTTPS if you want web application or you 
can use something simple like RDP to hosted application.

 > b. run on internet or intranet

Most applications that have a database backend can do this if written properly.

 > e. RDBMS read/write intensive

This might push me to something like RDP (or xWindows), but it depends on where 
the data is coming from that causes the 'intense' writing and the nature of the 
'intense' reading'.  You certainly don't want to be moving the data over the 
Internet any more than is necessary.

 > d. be able to work on-line or off-line (with automatic updates to db
 > when coming back on-line)

This would require quite a lot of work and using some sort of DB 
synchronization.  This item is the holy grail that many try to achive, but IMHO 
few actually fully achieve it.

 > e. be able to print reports and labels using a variety of
 > printers(laser, deskjet, label printers)

Web applications are REALLY bad a printing.  They have no real ability to 
interact with a printer like a client application does.  If I wanted to drive 
label printers, I would use a client hosted application (but might get the data 
from a remote server via XMLRPC, WEBDAV, etc).

 > f. have a rich set of desktop-like components

You can use components like Yahoo User Interface (YUI) or Google Web Toolkit. 
(GWT) but they are nothing like the rich set of tools you get from wxWindows, 
QT, etc. on a client application and development takes a LOT longer to get 
correct.  The disconnected nature of the Web can make applications that are 
trivial when written as client-server, quite difficult.

 From what you have given me, I would lean towards a hosted application with RDP 
connection.  A lot more information would be required to make the final choice 
of development architecture, languages, database, UI toolkits, etc.

Hope this helps.

-Larry Bates


From python at rcn.com  Mon May  5 04:16:42 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 5 May 2008 01:16:42 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org> 
	<fvirho$15ti$2@news.mtu.ru>
	<9d890b77-688e-4207-8eb3-8233d287ecb6@8g2000hse.googlegroups.com>
Message-ID: <ca7ce69b-c108-492d-80ac-29d4582c1cc7@1g2000prg.googlegroups.com>

> > > However I find the seccond argument hack ugly. Does the sum way have any
> > > performance advantages over the reduce way?
>
> > Yes, sum() is faster:
...

> Not really; you measure the import and the attribute access time in
> the second case. sum() is 2x faster for adding numbers only:

Try it with Py2.6 or Py3.0.  The sum() function has been optimized and
should be at least 6x faster for summing ints and floats.  It should
even beat psyco optimized sums!


Raymond


From paddy3118 at googlemail.com  Fri May  9 14:37:21 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 9 May 2008 11:37:21 -0700 (PDT)
Subject: Wanted: Citation supporting Duck Typing
References: <2385391e-f550-43be-b52e-cc23ba4f5381@d45g2000hsc.googlegroups.com>
Message-ID: <014a1de8-3300-4920-b3dd-3bf452b49fc5@t54g2000hsg.googlegroups.com>

On May 9, 6:30 pm, Paddy <paddy3... at googlemail.com> wrote:
> Hi,
> The wikipedia article on Duck Typing has this criticism section that
> needs a citation:
> (Fron:http://en.wikipedia.org/wiki/Duck_typing#Criticism)
>
> An often cited criticism is this:
>     One issue with duck typing is that it forces the programmer to
> have a much wider understanding of the code he or she is working with
> at any given time. In a strongly and statically typed language that
> uses type hierarchies and parameter type checking, it's much harder to
> supply an unexpected object type to a class. For instance, in python,
> you could easily create a class called Wine, which expects a class
> implementing the "press" method as an ingredient. However, a class
> called Trousers might also implement the press() method. With Duck
> Typing, in order to prevent strange, hard to detect errors, the coder
> needs to be aware of each potential use of the method "press", even
> when it's conceptually unrelated to what he or she is working on. With
> type checking and hierarchical type declarations, all wine ingredients
> would be subclasses of WineIngredient or something like that, negating
> the problem.
>
>     In essence, the problem is that, "if it walks like a duck and
> quacks like a duck", it could be a dragon doing a duck impersonation.
> You may not always want to let dragons into a pond, even if they can
> impersonate a duck.
>
> In practice, the issue is equivalent to not mixing dissimilar objects
> for duck-typing and is handled almost transparently as part of the
> knowledge of the codebase required to maintain it.[citation needed]
>
> I've only found this so far as a citation:
>  http://jessenoller.com/2007/05/30/typeducking-on-duck-vs-static-typing/
> Whilst it is good, do you know any other work that refutes the
> criticism?
>
> (I, and many others don't see the problem, but who has written about
> it).
>
> Thanks, Paddy.

A bit more searching gives me:

  http://hans.fugal.net/blog/articles/2006/07/08/duck-typing-defended
And:
  http://www.mindview.net/WebLog/log-0025

I don't have a collection of Dynamic language books though.

- Paddy.


From gagsl-py2 at yahoo.com.ar  Thu May  1 06:52:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 07:52:02 -0300
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
	<mailman.398.1209633049.12834.python-list@python.org>
	<7292bae2-993e-41cc-8f0e-8d1339ecebdf@25g2000hsx.googlegroups.com>
Message-ID: <op.uag1s0k3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 06:21:22 -0300, n00m <n00m at narod.ru> escribi?:

>> > import difflib
>> > s = difflib.SequenceMatcher(None, s1, s2)
>> > print s.find_longest_match(0, len(s1), 0, len(s2))
>> > (0, 0, 0)
>> >
>> > I think it's line #314 in difflib "who's to blame" --
>>
>> Me too. Could you think of some alternative? Simply disabling that
>> "popularity check" would slow down the algorithm, according to the
>> comments.
>
> No idea :)

The "ignore popular elements" is only an optmization, and it should not be  
applied in your case because it forces the algorithm to yield an invalid  
result.
I can think of two alternatives:
- tune up the conditions when the optimization is used, or
- make it user configurable

SequenceMatcher is a public class, and it is also internally used by  
Differ and others to compare both sequences of lines *and* pairs of  
similar lines (considered as sequences of characters). In this last usage  
the "ignore popular elements" has no much sense, as shown in your example  
feeding directly two dissimilar strings.
In principle one should disable the "populardict" stuff when dealing with  
strings. Below is a simple attempt to detect that case:

(around line 311 in difflib.py)

         b_is_string = isinstance(b, basestring) # add this line
         for i, elt in enumerate(b):
             if elt in b2j:
                 indices = b2j[elt]
                 if not b_is_string and n >= 200 and len(indices) * 100 >  
n: # change this line
                     populardict[elt] = 1
                     del indices[:]
                 else:
                     indices.append(i)
             else:
                 b2j[elt] = [i]


-- 
Gabriel Genellina



From paul at boddie.org.uk  Mon May  5 17:36:46 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 5 May 2008 14:36:46 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
Message-ID: <3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>

On 5 Mai, 20:26, vivai... at gmail.com (Ville M. Vainio) wrote:
>
> Basically, avoiding GPL maximizes the brainshare that a small-ish tool
> is going to attract, and many (including myself, FWIW) view GPL as a
> big turn-off when I consider spending some time to familiarize myself
> with a tool, or recommending it to someone else.

I'd like to cast a vote for the opposing camp: I'm probably more
likely to look at GPL-licensed code, although I recognise that I have
the benefit of not having anyone superior to me wanting to release
proprietary software. Applications and tools are ideal candidates for
GPL-licensing, although I also recognise that someone might want to
adapt the code for a library, and that they might not feel comfortable
with the copyleft aspects of the resulting licence on that library.

Anyway, I'm just confirming that I'm clearly not one of the "many"
described above. A lot of my own work is licensed under the GPL or
LGPL, and while I'd be the first to admit that not much of what I've
written is wildly popular, I think the reasons for not using it purely
because of the licences are typically overstated.

Paul


From kyosohma at gmail.com  Fri May 23 16:54:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 13:54:43 -0700 (PDT)
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
Message-ID: <08424ab8-e5c4-4aca-a492-1410e56f38a2@y38g2000hsy.googlegroups.com>

On May 23, 1:59?pm, tinn... at isbd.co.uk wrote:
> I'm desperately trying to move a Microsoft Access database application
> (a simple accounts system I wrote myself) to Linux. ?Python is one of
> my preferred programming laguages so I wonder if there are any good
> Python 'frameworks' for writing database applications, in particular I
> need good reporting and forms writing facilities. ?The basic database
> and logic/arithmetic seem fairly simple to me.
>
> --
> Chris Green

You might take a look at Dabo. It's made for databases and is pretty
cool.

http://dabodev.com/

Not sure what else is out there.

Mike


From florencio.cano at gmail.com  Sun May 11 04:44:42 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Sun, 11 May 2008 10:44:42 +0200
Subject: Some error messages in Python are ugly
In-Reply-To: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <c496e0a70805110144g2fb69158xe3d76a4cbc11928e@mail.gmail.com>

This is not a Python error, this is a bash message that appears when
you press ctrl+z and put the application in the background. Execute fg
to return the app to the foreground.

2008/5/11  <wxPythoner at gmail.com>:
> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?


From greg at cosc.canterbury.ac.nz  Tue May 20 23:01:55 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 21 May 2008 15:01:55 +1200
Subject: Code/test ratio wrt static vs dynamic typing [was: Re: Python
	Success stories]
In-Reply-To: <e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
Message-ID: <69hi0iF32kli9U1@mid.individual.net>

Someone wrote:
>>>I'm just curious whether this
>>>argument against dynamic typing - that you end up doing the job of a
>>>static compiler in test code - holds in practice.

I suspect that, although some of the things caught
by the tests would be caught by static typing, the
very *same* tests are also catching a lot of things
that wouldn't be caught by static typing.

Also, I don't think it's valid to equate the size of
the tests with the amount of effort it took to develop
them. For instance, the test suite for Pyrex is currently
larger than the Pyrex compiler, but I've still spent
far more time and effort developing the compiler than
writing the tests.

-- 
Greg


From subhabrata.iisc at hotmail.com  Wed May 28 09:59:28 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 06:59:28 -0700 (PDT)
Subject: Error handling in Python
Message-ID: <5d6a51a9-3d35-4c99-b7ef-fa79f950ece8@l17g2000pri.googlegroups.com>

Dear Members of the group,
If I open a url by urlopen in the urllib, the file is either opening a
file or if no url is there it would give error. The error is generated
can be handled by IOError handling schemes.
But if there are thousands or millions of URLs and I do not know who
will open and who won't open. How can I handle this kind of situation?
If any one can help solving this problem.
Regards,
Subhabrata.


From Tymoteusz.Jankowski at gmail.com  Fri May  9 13:05:34 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Fri, 9 May 2008 10:05:34 -0700 (PDT)
Subject: the lvalue curse? let's play with this crazy idea ;)
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
	<68il63F2su97jU5@mid.uni-berlin.de>
Message-ID: <cc7d10bb-5fed-4256-a8cc-99fd6765b23d@x41g2000hsb.googlegroups.com>

On May 9, 11:52?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> Maybe it's also harder to read than this::
>
> ? print '-'.join(map(str, time.localtime()[:3]))

I like this concept, it's so, .. ziped :)

> Of course, if you don't mind the extra padding zeroes in day and month::
>
> ? print time.strftime('%Y-%m-%d')

I'll be humble, it covers my need the most :)
If you have a lack of knowladge you work harder...
One instruction (besides 'print')... . Do you believe it? :)


> You are a little bit inconsistent with the arguments. ?`g` is explicitly
> mentioned in ``list(g)``. ?But why the intermediate names at all?
>

That's right, because it was just a scratch of an idea..
The point of the idea was this...
I read from left to right, and because of that it's easier to me
follow this way of writing (you only follow by one direction and the
value is handing over, from left to rigght ...):

value -> do_something -> result -> action_on_the_result -> ...

than this multiline lvalues assignes

variable = value # I take a look at the left then the right
result = do_something(variable) # Here I check also left and right
side, and perhaps I (a short memory) may check the line over
action_on_the_result(result)
...

However, I've just found out, that even the more difficult method to
me isn't so scary if I read it like this
...
6 7
4 5
2 3
  1
However the 2nd:
because there is:
print '-'.join(map(str, time.localtime()[:3]))

so i'm not serious convincing anyone :)


> Maybe you should look into languages like SmallTalk or Io where everything
> is done with method calls. ?Your example in Io::

I took a brief look at them, and Python is still Nr OnE :)


From steven.klass at gmail.com  Wed May 14 19:07:30 2008
From: steven.klass at gmail.com (rh0dium)
Date: Wed, 14 May 2008 16:07:30 -0700 (PDT)
Subject: More fun with PyParsing - almost did it on my own..
Message-ID: <bba49cff-a4aa-4fb1-9f1d-1c6436275585@w8g2000prd.googlegroups.com>

Hi all,

I almost did my first pyparsing without help but here we go again.
Let's start with my code.  The sample data is listed below.

# This will gather the following ( "NamedPin" "PinDirection"
"OptionalSignal" )
guts = Group( LPAR.suppress() +
quotedString.setParseAction(removeQuotes).setResultsName("name") +
quotedString.setParseAction(removeQuotes).setResultsName("direction")
+
Optional(quotedString.setParseAction(removeQuotes).setResultsName("signal"))
+ RPAR.suppress())

# This will simply wrap the Cell Info around it
cell = Group( Literal("dbSetCellPortTypes").suppress() +
quotedString.setParseAction(removeQuotes).setResultsName("library") +
quotedString.setParseAction(removeQuotes).setResultsName("name") +
Literal("'").suppress() +  LPAR.suppress() +
OneOrMore(guts).setResultsName("pins") + RPAR.suppress() ) +
Literal("#f").suppress() | Literal("#t").suppress()

# This grabs many cells
cells = OneOrMore(cell)

OK and it sorta works if I do the following:

x =  cells.parseString(data)
print x[0].asDict()

reveals
{'pins': ([(['A', 'Input'], {'direction': [('Input', 1)], 'name':
[('A', 0)]}), (['B', 'Input'], {'direction': [('Input', 1)], 'name':
[('B', 0)]}), (['Y', 'Output'], {'direction': [('Output', 1)], 'name':
[('Y', 0)]}), (['VDD', 'Inout', 'Power'], {'direction': [('Inout',
1)], 'name': [('VDD', 0)], 'signal': [('Power', 2)]}), (['VSS',
'Inout', 'Ground'], {'direction': [('Inout', 1)], 'name': [('VSS',
0)], 'signal': [('Ground', 2)]})], {}), 'name': 'AND2X1', 'library':
'stdcell130'}

As you can see the Pins is all jacked up and I want is not that.  I
want the following

{ 'name': 'AND2X1',
  'library':'stdcell130'
  'pins': [ { 'name': 'VSS', 'direction':'Inout', 'signal':'Ground'},
             { 'name': 'VDD', 'direction':'Inout', 'signal':'Power'},
             { 'name': 'A', 'direction':'Input' },
             { 'name': 'B', 'direction':'Input' },
             { 'name': 'Y', 'direction':'Output' } ]
}

What did I do wrong in my code..

Thanks again!

           ]




I would expect my results to look like this:

But to get any info I must do this

print x[0].asDict()

which is not really what  want.
What I expect is this:
[


data = """dbSetCellPortTypes "stdcell130" "AND2X1" '(
  ("A" "Input" )
  ("B" "Input" )
  ("Y" "Output" )
  ("VDD" "Inout" "Power" )
  ("VSS" "Inout" "Ground" )
) #f
dbSetCellPortTypes "stdcell130" "AND2X2" '(
  ("A" "Input" )
  ("B" "Input" )
  ("Y" "Output" )
  ("VDD" "Inout" "Power" )
  ("VSS" "Inout" "Ground" )
) #f """


From arnodel at googlemail.com  Tue May 20 10:43:41 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 15:43:41 +0100
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <m2y7656noi.fsf@googlemail.com>

brad <byte8bits at gmail.com> writes:

>> Vicent Giner wrote:
>
>> The usual answer is that development time is more important than
>> running time.
>
> This depends. Run time is not important until you are asked to scale
> to millions or billions of users or computations or large data
> sets. I've seen this first hand. Getting results back the same day or
> sooner may be important. In cases such as this, I use C or
> C++... nothing else will do. Nothing else is as fast. Although I
> always keep a py version around for testing and for smaller
> tasks. Don't get me wrong, I love Python, but there are times when
> nothing, but pure, hard speed will do.

Sure.  Be careful not to overdose on it though.

-- 
Arnaud


From notnorwegian at yahoo.se  Mon May 26 22:46:43 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 19:46:43 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
Message-ID: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>

>>> x
[',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
'clever', 'handsome']
>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>>> x
[',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
'clever', 'handsome']
>>>

what do i need to do?


From larry.bates at websafe.com`  Tue May  6 16:20:57 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 06 May 2008 15:20:57 -0500
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <euadncAHXvcmIL3VnZ2dnUVZ_r7inZ2d@comcast.com>

jmDesktop wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

Zope has an implementation of interfaces that Zope 3 and Twisted both use if you 
want to take a look.

http://www.zope.org/Products/ZopeInterface

Frankly, I've never missed them.

-Larry



From castironpi at gmail.com  Wed May 14 14:09:36 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:09:36 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com>
Message-ID: <8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com>

On May 14, 1:07?pm, castiro... at gmail.com wrote:
> On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > How does it generate text?
>
> > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > place to start the ring.
>
> > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > some cubic verticals.
>
> > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > can pretty well win work.- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > - Show quoted text -
>
> > If Python can plot in to chess, and Tron rings live, then why not
> > group it knew?- Hide quoted text -
>
> > - Show quoted text -
>
> That would be know. ?Plot and split in too.- Hide quoted text -
>
> - Show quoted text -

Now can I catch function-type objects from a throw?  I'm crossing all
of those.


From mail at timgolden.me.uk  Thu May 29 05:55:08 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 10:55:08 +0100
Subject: Finding file details...
In-Reply-To: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
Message-ID: <483E7D7C.5080605@timgolden.me.uk>

Kalibr wrote:
> I've been trying to figure out how to find the details of files
> (specifically music for now) for a little sorting script I'm making,
> My aim is to get details on the artist, album, and genre for mp3 and
> wma files (possibly more in the future). My closest match was when I
> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
> to help (and most of it went over my head). Is there any module I can
> use to find this sort of data? I'm trying to not make it specialised
> in music, because I may want to extend this to picture, movie, text
> etc. files in the future. Any ideas how I could go about this?

You don't say, but I assume you're on Windows since you mention
GetFileVersionInfo (which doesn't have anything to do with media
files, by the way) and WMA. There may be packages out there
to do all this already but if not you'll need to pull in a few disparate
modules and mix'n'match.

While ID3 readers (which determine the metadata for MP3) are reasonably
common few of them come ready-compiled for Windows. I've used Ned
Batchelder's id3reader [1] successfully for simple tasks so you might try
that. On the WMA side, you can automate Windows Media Player to get
metadata. (And it might work for .mp3; I've not tried).

<code>
import win32com.client

player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
try:
  artist = wmedia.getItemInfo ("Artist")
finally:
  player.mediaCollection.remove (wmedia, False)

print "bells.mp3 has artist", artist

</code>

You're going to have to dig around for docs on this one. And it's not
pretty. Try starting from: 

http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx

TJG

[1] http://nedbatchelder.com/code/modules/id3reader.html


From google at mrabarnett.plus.com  Thu May 22 13:05:42 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Thu, 22 May 2008 10:05:42 -0700 (PDT)
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
Message-ID: <ae23c0ab-62e8-486c-b79b-a1672c1c666d@d45g2000hsc.googlegroups.com>

On May 22, 3:20 pm, s0s... at gmail.com wrote:
> On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>
> > > Hi, I wanted to know how cautious it is to do something like:
>
> > > f = file("filename", "rb")
> > > f.read()
>
> > > for a possibly huge file. When calling f.read(), and not doing
> > > anything with the return value, what is Python doing internally? Is it
> > > loading the content of the file into memory (regardless of whether it
> > > is discarding it immediately)?
>
> > I am not a Python interpreter developer, but as user, yes I'd expect that to
> > happen. The method doesn't know you are not doing anything with its return
> > value.
>
> > > In my case, what I'm doing is sending the return value through a
> > > socket:
>
> > > sock.send(f.read())
>
> > > Is that gonna make a difference (memory-wise)? I guess I'm just
> > > concerned with whether I can do a file.read() for any file in the
> > > system in an efficient and memory-kind way, and with low overhead in
> > > general. (For one thing, I'm not loading the contents into a
> > > variable.)
>
> > Doesn't matter. You allocate a string in which the contents is loaded (the
> > return value of 'f.read()', and you hand over (a reference to) that string to
> > the 'send()' method.
>
> > Note that memory is allocated by data *values*, not by *variables* in Python
> > (they are merely references to values).
>
> > > Not that I'm saying that loading a huge file into memory will horribly
> > > crash the system, but it's good to try to program in the safest way
> > > possibly. For example, if you try something like this in the
>
> > Depends on your system, and your biggest file.
>
> > At a 32 bit platform, anything bigger than about 4GB (usually already at around
> > 3GB) will crash the program for the simple reason that you are running out of
> > address space to store bytes in.
>
> > To fix, read and write blocks by specifying a block-size in the 'read()' call.
>
> I see... Thanks for the reply.
>
> So what would be a good approach to solve that problem? The best I can
> think of is something like:
>
> MAX_BUF_SIZE = 100000000  # about 100 MBs
>
> f = file("filename", "rb")
> f.seek(0, 2)  # relative to EOF
> length = f.tell()
> bPos = 0
>
> while bPos < length:
>     f.seek(bPos)
>     bPos += sock.send(f.read(MAX_BUF_SIZE))

I would go with:

f = file("filename", "rb")
while True:
    data = f.read(MAX_BUF_SIZE)
    if not data:
        break
    sock.sendall(data)


From robert.kern at gmail.com  Tue May 20 18:59:30 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 20 May 2008 17:59:30 -0500
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <48335269.2000809@admailinc.com>
References: <48335269.2000809@admailinc.com>
Message-ID: <g0vl4i$km7$1@ger.gmane.org>

Ethan Furman wrote:
> Greetings,
> 
> I'm looking at the struct module for binary packing of ints and floats.  
> The documentation refers to C datatypes.  It's been many years since I 
> looked at C, but I seem to remember that the data type sizes were not 
> fixed -- for example, an int might be two byes on one machine, and four 
> bytes on the next.  Can any C programmers verify this?  If it is true, 
> does that mean that struct.pack('h', 8001) might give me different 
> results depending on the machine it's running on?

Right. I believe (but could be wrong) that "char" is defined to be one byte, but 
that "short", "int", "long", and "long long" are defined as "at least as big as 
the previous type".

In practice, though, on nearly every machine that Python runs on, "char" is one 
byte, "short" is two bytes, and "int" is four bytes. "longs" and "long longs" 
tend to vary substantially, though; never assume sizes for them.

Single-precision floats are always four bytes and double-precision floats are 
always eight bytes. "long doubles" vary; they could be twelve bytes or sixteen.

If you want to deal with fixed sizes, use struct.calcsize() to test the sizes of 
each of the integer types, assign them to width-specific aliases, and always use 
these aliases.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun May  4 06:17:24 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 04 May 2008 12:17:24 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
Message-ID: <685gpkF2r5j39U1@mid.individual.net>

Gary Herron wrote:

> No NO NO!   The only way to increment a variable in memory is
> through a three step process:
> 
>   Load a register from a memory location
>   Increment the register
>   Store the value back into memory.

I suggest you read "Intel 64 and IA-32 Architectures Software
Developer's Manual" (2A, Instruction Set Reference A-M). INC and
DEC can have register *or* memory location as operand, and can be
executed atomically even in multiprocessor environments (LOCK
prefix).
 
> Ages ago, there were architectures that would do an increment on a
> memory location in an atomic way, but with the current (RISC)
> architectures these are three separate operations.

That may be true for RISC architectures. Unfortunately, all 8086
based CPUs are CISC.

Regards,


Bj?rn

-- 
BOFH excuse #277:

Your Flux Capacitor has gone bad.



From jhenRemoveThis at talk21.com  Sat May 31 13:50:09 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sun, 01 Jun 2008 03:50:09 +1000
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
Message-ID: <6adhelF371mogU1@mid.individual.net>

globalrev wrote:

> i want to build a service where you can send an SMS with your
> cellphone to my website and then the site will collect the
> data you asked for and SMS it back.
> 
> so what components would i need for that?

Arguably the simplest route is to use a phone with a serial
connection to a computer, whether that connection be RS232,
USB, IrDA or Bluetooth.

For outgoing messages in large volume, SMS lodgement directly to
an SMSC (message centre) via SMPP over an internet connection
is likely to be a cheaper option in the long term.  But that'll
depend on what's on offer in your part of the world.

There's probably some means of receiving messages without using
your own hardware, but I'm not aware of any details.

If using your own hardware, I'd suggest a cellular modem rather
than a handset.  These are permanently powered by a low voltage
DC supply, rather than a battery you need to keep charged
without destroying it with constant overcharge.

And a modem is more likely to support text-mode command
interactions with your computer rather than raw PDU-mode
interactions.  PDU-mode requires your software to translate
to/from the raw transmitted SMS data, but gives you much
greater control.

The rest is software, and your cost will depend on how you get
or develop that.

You might be able to get a SIM (assuming a GSM or UMTS cellular
device) with very cheap SMS rates.  A pre-paid service will
limit your losses if your software ever gets over-enthusiastic
about sending messages.

John


From badmuthahubbard at gmail.com  Mon May 12 19:41:39 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 13 May 2008 02:41:39 +0300
Subject: Learning Python for no reason
In-Reply-To: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <8200bab70805121641n7ec4d23ds2efadfa6c65a307d@mail.gmail.com>

I'm another one pretty early in his programming education, but here's my take.
Python was specifically recommended to me by a few people for a
specific program I wanted to write (userspace, GUI, music).  While I
gradually learn more about it, I start to spend a lot of time on
certain aspects I don't really need for this task.  I think curiosity
is one of the vital qualities for a programmer, and through mine, over
a few years, I've built up more and more understanding of what's going
on in my box, more than I set out to have, but I can't see how any of
this can be called wasted time if it rounds out my general
understanding.
On the other hand, as Python is about the second "serious" language
I've tried to learn (the others being web- or music- oriented, and I
didn't approach them as programming), I don't have much to compare it
to.  I was under the impression before reading your message that
Python was very popular and useful.  This list is far more active than
all the others to which I'm subscribed put together!  So, either it
doesn't seem like a silly endeavor to learn it for its own sake, or
they're using it for something.

If it is a silly endeavor, I'm going to have to ask you to stop this
thread, it's too silly.

-Chuckk

On Mon, May 12, 2008 at 8:27 PM, John Salerno <johnjsal at nospamgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
>  Python" each night. Does anyone see any value in learning Python when you
>  don't need to for school, work, or any other reason? I mean, sure, there's
>  value in learning anything at any time, but for something like a programming
>  language, I can't help but feel that I will be mostly unable to use what I
>  learn simply because I have no reason to use it.
>
>  The *process* of learning is enough fun for me, and every now and then I do
>  find a small use for Python that really pays off, but for the most part I'm
>  wondering what people's thoughts are as far as simply learning it for the
>  sake of learning. Does it seem like a silly endeavor to most people? Did
>  anyone here learn a programming language when you didn't need to? If so, how
>  much and in what capacity did you use it after you learned it?
>
>  Hopefully this question even makes sense!
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From bearophileHUGS at lycos.com  Wed May 28 05:28:54 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Wed, 28 May 2008 02:28:54 -0700 (PDT)
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
Message-ID: <15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>

Dennis Lee Bieber, the ghost:
> I'd have to wonder why so many recursive calls?

Why not? Maybe the algorithm is written in a recursive style. A
language is good if allows you to use that style too.
On modern CPUs 50000 levels don't look that many levels.

Bye,
bearophile


From zerge69 at gmail.com  Wed May 21 00:00:07 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Tue, 20 May 2008 21:00:07 -0700 (PDT)
Subject: Port scan module
Message-ID: <e6f545e4-5acb-4a65-a894-11c2e1a03fc8@f24g2000prh.googlegroups.com>

I programmed a port scanning module which you can download here
http://code.google.com/p/portscan/

Including the module in your program allows you to scan specific ports
in an IP, using the function scan(ip,port,timeout). Instead of getting
a cryptic code in return, the function will return "open", "closed",
"filtered", or "timeout".

It's a great way of learning about port scanning with Python


From vbgunz at gmail.com  Wed May 14 10:04:50 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 07:04:50 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
Message-ID: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>

I remember learning closures in Python and thought it was the dumbest
idea ever. Why use a closure when Python is fully object oriented? I
didn't grasp the power/reason for them until I started learning
JavaScript and then BAM, I understood them.

Just a little while ago, I had a fear of decorators because I really
couldn't find a definitive source to learn them (how to with with @).
How important are they? They must be important otherwise why have'em
in the language? I had to learn'em and then suddenly, BAM. I
understand them.

My main issue with closures and decorators was hidden in the fact of
how *dead simple* they were. All I needed were reasons to use them
over doing it X style. So what is my point? How dead simple are class
methods? I must be missing there point so I am convinced they must be
dead simple.

classes, functions, instance and static methods are easy. So easy in
fact, I could shoot myself in the foots without looking (preferably
without aiming). So, why am I stuck on the *idea* of a class method?

An instance method works on the instance
A Static method is basically a function nested within a class object
A class method is overkill?

I can call a static or class method through either the class OR any
instance of it. I've never designed a method that took advantage of
the class name except in cases where I needed to extend a super class
*but* even in this case, I didn't use the enclosing class name...

Whats the deal with class methods, why use them over anything else?
What does a class method accomplish in at least one line shorter than
anything else? Does it help reduce duplication or typing? I am at a
lost for words that can shed at least *one* good reason to use them.

What is the one greatest reason to use them? A little syntax and
explanation can go a long long way. I am failing to understand them so
any help is really appreciated here!


From mail at timgolden.me.uk  Fri May 16 09:25:10 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 14:25:10 +0100
Subject: Problem creating a shorcut
In-Reply-To: <826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>	<322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>
	<826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>
Message-ID: <482D8B36.4000406@timgolden.me.uk>

Mike Driscoll wrote:
> Ah. I was unaware of the Arguments parameter. That works quite well.
> Where does one find this information anyway? I think I found mine from
> bits and pieces scattered in various tutorials.

The canonical place would be:

http://msdn.microsoft.com/en-us/library/bb774950(VS.85).aspx

TJG


From n00m at narod.ru  Tue May  6 01:52:15 2008
From: n00m at narod.ru (n00m)
Date: Mon, 5 May 2008 22:52:15 -0700 (PDT)
Subject: How to pass a multiline arg to exec('some.exe arg')?
References: <mailman.595.1210009109.12834.python-list@python.org>
Message-ID: <eb8b408f-3454-480c-b248-9385c58973c3@c65g2000hsa.googlegroups.com>


> Yes, call flush() each time you're done writing.

No, it would be too easy & simple.
While stdin is NOT CLOSED stdout has not EOF, but readlines()
waits for its appearence ... and so freezes for good. IMO.
Should be like this:

import popen2
o=popen2.popen2('osql -E -S(local) -dpubs -c"GO" -n -w8000')
while 1:
    o[1].write(raw_input()+'\nGO\n')
    o[1].flush() # this line can be commented
    res=''
    while 1:
        line=o[0].readline()
        if line=='\n': # ??????????????????????????????
            break
        res+=line
    print res

How to break the while loop?
What is the sign of "there is left nothing to read"?

2.
I'm still curious why multiline parameter does not work in Py.
This is how it looks in VBS (and works Ok):

Set w = CreateObject("WScript.Shell")
q = "select * from authors" & vbCrLf
q = q + "select getdate()" & vbCrLf
q = q + "select * from jobs"
Set e = w.Exec("osql.exe -Q""" + q + """")

In shell line it looks like:
osql.exe <...> -Q"select * from bla"


From efurman at admailinc.com  Tue May 13 15:44:31 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 13 May 2008 11:44:31 -0800
Subject: looking for a pdf module
In-Reply-To: <4829B52E.6060903@islandtraining.com>
References: <4829C0B8.9090605@admailinc.com>
	<4829B52E.6060903@islandtraining.com>
Message-ID: <4829EF9F.80009@admailinc.com>

Gary Herron wrote:

> Ethan Furman wrote:
>
>> Greetings!
>>
>> I'm hoping to be able to generate pdf files on the fly -- are there 
>> any python modules out there to do that?
>>
>> All help appreciated!
>> -- 
>> Ethan
>> ------------------------------------------------------------------------
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>
> ReportLabs is a quite extensive open-source project for generating PDF 
> files.
>
>    http://www.reportlab.org/
>
> Enjoy,
>
> Gary Herron
>
Awesome, thanks!
--
Ethan

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From irmen.NOSPAM at xs4all.nl  Mon May 12 07:48:28 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 12 May 2008 13:48:28 +0200
Subject: Import/Create module from buffer
In-Reply-To: <bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
	<bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>
Message-ID: <48282e92$0$14346$e4fe514c@news.xs4all.nl>

Gruik wrote:

> But before that 1 question: what if I'm in Python ?
> Following your solution, I did that in Python :
> 
>     def load_buffer(buffer) :
>         compiled_buffer = compile(buffer, "module_name", "exec")
>         exec(compiled_buffer)
> 
> It works great except that I can't have a module object and that it is
> as if I did "from module import *"
> But I need the module object and not an "import *" behavior.
> Any idea about the way to do that?

Something along the lines of:

import new
mymodule = new.module("mymodule")
exec <<<code>>> in mymodule.__dict__



--irmen


From lists at svrinformatica.it  Fri May 23 10:10:33 2008
From: lists at svrinformatica.it (Mailing List SVR)
Date: Fri, 23 May 2008 16:10:33 +0200
Subject: Python treeview and recursion: help needed
In-Reply-To: <1211527245.7401.3.camel@localhost.localdomain>
References: <1211527245.7401.3.camel@localhost.localdomain>
Message-ID: <1211551833.7401.15.camel@localhost.localdomain>

Il giorno ven, 23/05/2008 alle 09.20 +0200, Mailing List SVR ha scritto:
> ?Hi, 
> 
> I have a database with the following structure:
> 
> id    name  sublevel
> 
> for example
> 
> 1     Node1     None
> 2     Node2     1
> 3     Node3     2
> 4     Node4     None
> 5     Node5     1
> 6     Node6     5
> ....
> ....
> 
> 
> where Node1 and Node4 are treeview's master nodes, Node2 is a subnode of
> Node1, Node3 is a subnode of Node2, Node5 is a subnode of Node1 and
> Node6 a subnode of Node5 and so on
> 
> I need a recursive function to populate treeview and I'm stuck on this
> function :confused:
> 
> I need a list where I have the master node with child node inside and if
> a child node as others child nodes, I need thess nodes inside the child
> nodes.
> 
> Something like this:
> 
> [
> {"id":1,"name":"Node1","Childs":[{"id:2","name":"Node2","Childs":[{"id":3,"name":"Node3","Childs":[]}]},
> {"id":5,
> "name":"Node5","Childs":[{"id":6,"name":"Node6","Childs":[]}]}]},{"id":4,"name":"Node4","Childs":[]}  
> ]
> 
> I'm using django so I access the data as 
> 
> all=Data.objects.all()
> 
> and I can do something like
> 
> for a in all:
>   print a.id
>   print a.name
>   
> to get database value.
> 
> Any help is appreciated,
> 
> thanks,
> Nicola
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

only for the records attacched is a working solution, maybe not the best
one but a working one,

regards
Nicol

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From lists at cheimes.de  Tue May 13 21:14:42 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 03:14:42 +0200
Subject: list.__len__() or len(list)
In-Reply-To: <3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
References: <g0d9sj$m58$1@registered.motzarella.org>
	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
Message-ID: <482A3D02.3020001@cheimes.de>

Ian Kelly schrieb:
> The purpose of obj.__len__() is to implement len(obj), which simply
> calls it.  So obj.__len__() may be faster, but only marginally.  The
> reason to prefer len(obj) is that if you inadvertently pass an object
> that does not implement __len__, you get the more appropriate
> TypeError rather than an AttributeError.

len(obj) is faster than obj.__len__() for several types like str. In
general len() is as least as fast __len__(). len() also does some extra
sanity checks.

python2.5 -m timeit "'abc'.__len__()"
1000000 loops, best of 3: 0.453 usec per loop

python2.5 -m timeit "len('abc')"
1000000 loops, best of 3: 0.292 usec per loop

Common code paths are already highly optimized. Don't try to be clever
unless you really understand what happens inside the interpreter. The
__internal__ methods are called magic methods for a reason. ;)

Christian



From ptmcg at austin.rr.com  Mon May 19 09:18:53 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:18:53 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
	<67828af6-82a6-4c5d-adc0-d5f8d4b083b0@x41g2000hsb.googlegroups.com>
Message-ID: <3e70e415-a276-4f91-b9d1-95dfc2f242ea@59g2000hsb.googlegroups.com>

On May 19, 8:09?am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 19, 4:54?am, kuratk... at kuratkull.com wrote:> Hello,
>
> <snip code example scraping a QOTD fromwww.mcgyver.com>
>
>
>
> > print out
> > **************
>
> Since you have no control over spacing and line breaks in the input,
> you can reformat using the textwrap module. ?First replace all "\n"s
> with " ", then use re.sub to replace multiple spaces with a single
> space, then call textwrap.fill to reformat the line into lines up to
> 'n' characters long (I chose 50 in the sample below, but you can
> choose any line length you like).
>
> out = match.findall(html)
> out = out[0].replace("\n"," ")
> out = re.sub("\s+"," ",out)
>
> print textwrap.fill(out,50)
>
> -- Paul

One last try - .replace("\n"," ") is unnecessary, textwrap.fill takes
care of removing extra newlines already.

out = match.findall(html)
out = out[0]
out = re.sub("\s+"," ",out)

print textwrap.fill(out,50)

-- Paul


From gherron at islandtraining.com  Mon May 19 04:29:51 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 19 May 2008 01:29:51 -0700
Subject: arrays
In-Reply-To: <BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>
	<BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>
Message-ID: <48313A7F.4050909@islandtraining.com>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
>  
> How do I make it so that I now have:
>  
> starting with first element (a[0])
> new_arr[0] = 'r'
> new_arr[1] = 'g'
> new_arr[2] = 'b'
> new_arr[3] = 'a'
> new_arr[4] = 'r'
> .....
>  
> continuing "through" a[1] with the same new_arr
> new_arr[N] = 'r'
> new_arr[N+1] = 'g'
> ....
>  
> -M
>
> ------------------------------------------------------------------------
> Give to a good cause with every e-mail. Join the i?m Initiative from 
> Microsoft. 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?souce=EML_WL_%20GoodCause> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
2 questions:

1.  Why have you flooded this news group with three identical copies of 
a question under three different subject?  This is a (mild) bit of abuse 
of the newsgroup.  One copy with a reasonable subject line is enough.

2.  Haven't I answered this question for you often enough already?   Was 
my answer not clear enough, or has the problem again changed slightly 
enough to require a new answer?   Having solved 3 or 4 versions of this 
problem for you already, I'm wondering why I'm seeing it posed yet one 
more time.   If this is *exactly* the same problem I solved once already 
(and I believe it is), why are we seeing it again, and if it is not the 
*exact* same problem,  why are we seeing so many similar version of 
it?   It's starting to feel like a slight abuse of my time to see this 
problem on the newsgroup again.  


Gary Herron



From rhh2109 at columbia.edu  Fri May  9 07:21:39 2008
From: rhh2109 at columbia.edu (Roy H. Han)
Date: Fri, 9 May 2008 07:21:39 -0400
Subject: Pythonwin
In-Reply-To: <aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<aa6cd676-d2de-422f-8d79-c90962986e97@c65g2000hsa.googlegroups.com>
Message-ID: <6a5569ec0805090421x34a74f22tc2c16758a93ff53a@mail.gmail.com>

Hi Clive,

For ArcGIS, I use plain old VIM, IPython and IDLE.

If you really want PythonWin, then you can download Mark Hammond's Python
for Windows extensions: http://sourceforge.net/projects/pywin32/

Note also that with the pywin32 extensions, you can also use Python 2.5 to
access ArcGIS using

from win32com.client import Dispatch
arcgis = Dispatch('esriGeoprocessing.GpDispatch')

If you just need to access shapefiles, there is shapelib:
http://shapelib.maptools.org/
To make shapelib bindings for Python 2.5
1. Download *shapelib_1_2_10.zip *from http://dl.maptools.org/dl/shapelib/
2. Download *pyshapelib-0.3.zip* from
ftp://intevation.de/users/bh/pyshapelib
3. Extract *pyshapelib-0.3.zip*
4. Extract *shapelib_1_2_10.zip* to the folder containing pyshapelib.
Rename the extracted folder as *shapelib*
5. From the pyshapelib directory, run python setup.py build.  The script
looks in its parent folder for the shapelib folder.
5. From the pyshapelib directory, python setup.py install

Hope that helps,
Roy
**
On Fri, May 9, 2008 at 6:46 AM, Niklas Norrthon <niklas.norrthon at hotmail.com>
wrote:

> On 9 Maj, 12:30, Clive_S <clives... at yahoo.co.uk> wrote:
> > Hi
> >
> > I am trying to use Python with ArcGIS.
> >
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> >
> > How do you install or launch pythonwin??
>
> There is a distribution of PythonWin bundled with the
> ArcGIS Desktop installation media, but it is not
> installed by the ArcGIS installer.
>
> You have three options:
> 1. Install it manually from the ArcGIS installation
> media.
> 2. Find it on the web (google for it), download and
> install.
> 3. (My recommendation) Don't bother. IDLE is pretty
> good. Emacs even better (unless you hate emacs).
>
> --
> Niklas Norrthon
> ESRI S-GROUP
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From alokkat at gmail.com  Wed May 28 08:41:06 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 08:41:06 -0400
Subject: Struct usages in Python
In-Reply-To: <ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<ae3f58470805272209l5fc77cdcp25279c25438bfadb@mail.gmail.com>
Message-ID: <e3a81e680805280541m4b6bd1d0n49e91eeb766f6854@mail.gmail.com>

while traversing I get out of index error as mentioned below.


class EventTimeFilter:

   def __init__(self):
*           self.event = [Event()]*


   def populateScheduleData(self):

       self.doc = libxml2.parseFile(self.FILENAME)
       for eachcamera in
self.doc.xpathEval('SetDeviceConfiguration/Camera/.'):
            cameraIndex = eachcamera.get_properties()
            #print cameraIndex
            index = int(cameraIndex.content,10)
            print index

            xpathEventType = 'SetDeviceConfiguration/Camera[@cameraIndex=' +
cameraIndex.content +']/Filter/Event'
            for searchResults in self.doc.xpathEval(xpathEventType):
             eventType = searchResults.get_properties()

            * self.event[index-1].cameraEventType = eventType.content #
Error*

*#Error as below*
    self.event[index-1].cameraEventType = eventType.content
IndexError: list index out of range

Any guidance why I am getting *list index out of range error*?
index value runs from 1 to 4.
Thanks for all your help.
Alok

On Wed, May 28, 2008 at 1:09 AM, Casey McGinty <casey.mcginty at gmail.com>
wrote:

>
>            self.event[] = Event()   *# Seems this is not allowed ?? *
>>
>
> self.event = [Event()]
>
> - Casey
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
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From mnikhil at gmail.com  Fri May 23 14:13:34 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 23 May 2008 23:43:34 +0530
Subject: Using MySQLdb to select into the local file
References: <g14gk0$ntt$1@registered.motzarella.org>
	<4835cf41$0$34536$742ec2ed@news.sonic.net>
Message-ID: <g171ge$t9p$1@registered.motzarella.org>

John Nagle wrote:
> Nikhil wrote:
>> I am using the MySQLdb python module. I have a table named 'testing' 
>> with few columns, under the 'test' database, what is hosted on a 
>> remote mysql server.
>>
>> I want to run the following query to get a comma-separated information 
>> from the table
>>
>>
>> LOCK TABLES foo READ;
>> SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
>>   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
>>   LINES TERMINATED BY '\n'
>>   FROM 'testing'
>> UNLOCK TABLES;
>>
>> ..the query is running fine, but what I am noticing is /tmp/result.txt 
>> is getting created locally on a mysqld running machine but not on the 
>> client(python program) using the MySQLdb module.
> 
>     Unfortunately, while there is LOAD DATA LOCAL INFILE, which
> reads a file on the client, there is no SELECT INTO LOCAL OUTFILE.
> 
>     Actually, you probably want to turn off the FILE privilege
> for your MySQL.  That blocks LOAD DATA INFILE and SELECT INTO
> OUTFILE, generally considered a good idea because those commands can
> access arbitrary file names.
> 
>     Also, if you're still using LOCK TABLES and UNLOCK TABLES,
> read up on InnoDB and transactions.
> 
>     Typically, you do something like this:
> 
> import MySQLdb
> import csv
> 
> def writedb(db, filename) :
>     try :
>         outcsv = csv.writer(filename)    # output object for CSV
>         cursor = db.cursor()                                    
> cursor.execute("SELECT a,b,a+b FROM testing")   
>         while True :            # do all rows
>             row = cursor.fetchone()    # get a tuple for one row
>             if row is None :    # if end of rows
>                 break        # done
>             outcsv.writerow(row)    # write row in CSV format
>         db.commit()            # release locks
> 
>     except MySQLdb.OperationalError, message:
>         print "Database trouble: ", message # handle any db problems
>         raise                # reraise exception
> 
> 
> hostname="???"                    # fill in appropriately
> user="???"
> password="???"
> db = MySQLdb.connect(host=hostname,         # open database
>     user=username, passwd=password, db=databasename)
> 
> writedb(db, '/tmp/result.txt')            # do it
> 
> ===============
> 
>   Note that this is ASCII-oriented; if you Unicode, you need
> extra params to "connect".  Also, the CSV module doesn't do
> Unicode well as yet.  Make sure the "outcsv" object
> goes out of scope before you try to read the file, so the
> file gets flushed and closed.
> 
>                     John Nagle
Thanks John. That was a useful tip.

Regards,
Nikhil


From nick at craig-wood.com  Fri May 23 05:30:08 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:08 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
	<mailman.1493.1211510178.12834.python-list@python.org>
	<grqZj.109$iM3.7@flpi150.ffdc.sbc.com>
Message-ID: <slrng3d1k9.3re.nick@irishsea.home.craig-wood.com>

I V <ivlenin at gmail.com> wrote:
>  On Thu, 22 May 2008 19:35:50 -0700, Charles Hixson wrote:
> > Although when comparing Candygram with Erlang it's worth noting that
> > Candygram is bound to one processor, where Erlang can operate on
> > multiple processors. (I'd been planning on using Candygram for a project
> > at one point, but this made it unusable.)
> 
>  Really? The FAQ says it uses operating system threads, which I would have 
>  thought would mean it runs on multiple processors (modulo, I suppose, the 
>  issues with the GIL).

I think candygram is crying out to be married with stackless &or PyPy.
It also needs an IPC channel to compete with Erlang directly.

If you are interested in stackless python vs Erlang then take a look
at this...

  http://muharem.wordpress.com/2007/07/31/erlang-vs-stackless-python-a-first-benchmark/

...and read the discussion too!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From upton at virginia.edu  Mon May 26 17:26:46 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 17:26:46 -0400
Subject: python raycaster, pycaster, where?
In-Reply-To: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805261426k589a4643m3970aaf27c2659b4@mail.gmail.com>

On Mon, May 26, 2008 at 4:52 PM,  <notnorwegian at yahoo.se> wrote:
> i tried googling this thing but couldnt find it. i cant find it in
> pyagme either.
>

Really?

http://www.google.com/search?q=pycaster

The first link has downloads for it.


From basti.wiesner at gmx.net  Mon May 26 13:32:12 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 19:32:12 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
Message-ID: <g1es85$r7u$03$1@news.t-online.com>

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Hash: SHA1

[ Ivan Illarionov <ivan.illarionov at gmail.com> ]

> On Mon, 26 May 2008 17:49:01 +0200, Sebastian 'lunar' Wiesner wrote:
> 
> [...]
>> Modern frameworks like Django or Grok require a somewhat great adaption,
>> since they strongly restrict the programmer's freedom.  I doubt, that
>> you would get Django or Grok working like your asp framework.
> 
> Actually, mordern frameworks (at least Djagno) does not "restrict the
> programmer's freedom", they only encourage clean design.

Can we agree on the fact, that Django _encourages clean design_ by
_restricting the programmers freedom to some degree_?  This comprise would
avoid an endless war about framework philosophy ;)  (and isn't so far from
the truth, btw)

> It's perfectly possible to write Django app with only one view and url
> pattern that redirects everything to different template engine like
> Cheetah or Mako and all the logic could be put inside those templates.

Absolutely,  but that's not what Django is about.  If you don't follow
Django's conventions and don't make use of Djangos facilities like its ORM
or its admin interface, Django just doesn't make sense anymore.

An application such as you outlined would depend on a big, heavy framework
to do a task, that could easily be done with plain WSGI or a WSGI wrapper
like Werkzeug.
 
> But, IMHO, writing PHP-style Python webapp is silly.

I completely agree here, but that's not, what the OP asked for ;)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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From inhahe at gmail.com  Sun May 18 04:27:56 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 04:27:56 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<cfe912ca-a447-461c-a5b3-2d9a996dce5b@c58g2000hsc.googlegroups.com>
Message-ID: <GLRXj.7004$255.387@bignews8.bellsouth.net>

By the way, "state" as a meronym of "city" and "state" as it applies to 
programming (i.e. stasis) are two unrelated things.

>I'd start to discuss state property in appertanance to city >property.
>What are some properties of the state?




From python at rcn.com  Fri May 30 23:46:07 2008
From: python at rcn.com (Raymond Hettinger)
Date: Fri, 30 May 2008 20:46:07 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
	<g0gndb$3vt$03$1@news.t-online.com>
Message-ID: <8c937dcb-082f-4182-be44-429fec31a8b9@z24g2000prf.googlegroups.com>

On May 15, 12:06?am, Peter Otten <__pete... at web.de> wrote:
> According
> to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
> work:

In Py2.6 and after, you only need < and ==.  I replaced the LE tests
with LT to match list.sort() and bisect.bisect().  The == arises
because nlargest/nsmallest compare decorated tuples.  Tuple comparison
always starts with equality tests to find the first unequal element
and then switches back to testing whichever inequality test was
requested.

Raymond


From lists at cheimes.de  Thu May  1 13:55:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 19:55:21 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A0409.6040706@cheimes.de>

Torsten Bronger schrieb:
> Hall?chen!
> 
> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

Try "python setup.py register sdist upload"

Christian


From exarkun at divmod.com  Mon May  5 15:32:52 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 15:32:52 -0400
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <20080505193252.6859.1948998822.divmod.quotient.59157@ohm>

On Mon, 5 May 2008 11:11:19 -0700 (PDT), TkNeo <tarun.kap at gmail.com> wrote:
>On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>>
>> > Mike Driscoll wrote:
>> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
>> > >> I need to do SSL file transfer using python? Is there a library i can
>> > >> use ?
>>
>> > >http://sandbox.rulemaker.net/ngps/m2/
>>
>> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>>
>> > --
>> >   Heikki Toivonen
>>
>> Whoops...I just went with the first link Google gave me. The link I
>> gave doesn't mention that the project has moved. Looks like the one
>> you link to is the 9th link on my Google search using the terms:
>> "python m2crypto".
>>
>> Sorry if I spread misinformation though.
>>
>> Mike
>
>ok i have tried around a lot but no luck. I think M2Crypto is my best
>option except it requires a minimum of python 2.4 which i don't have.
>
>What i am trying to do is to do an FTP transfer that uses SSL
>(username, password authentication) and not a certificate file. The
>few example i have found of the Openssl module use a certificate for
>authentication unlike what i want to do.
>
>Anyone has any ideas ?

FWIW, though not as complete as an OpenSSL wrapper as M2Crypto, pyOpenSSL
works with Python 2.3.

As far as the details of the authentication that you are attempting go, it
sounds like you want to use ephemeral DH key exchange.  This is something
which is on my list to figure out. ;)

Jean-Paul


From george.sakkis at gmail.com  Sat May 17 04:06:12 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 17 May 2008 01:06:12 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <95294ce6-38a0-44cd-8b0f-2bce0642886d@27g2000hsf.googlegroups.com>

On May 16, 5:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time. ?If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated. ?For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated). ?Roughly:
>
> for pid in procs_dict:
> ? if procs_dict[pid].poll() != None
> ? ?# do the counter updates
> ? ?del procs_dict[pid]

Since you don't look up processes by pid, you don't need a dictionary
here. A cleaner and efficient solution is use a deque to pop processes
from one end and push them to the other if still alive, something like
this:

from collections import deque

processes = deque()
# start processes and put them in the queue

while processes:
    for i in xrange(len(processes)):
        p = processes.pop()
        if p.poll() is None: # not finished yet
            processes.append_left(p)
    time.sleep(5)


HTH,
George


From exhuma at gmail.com  Wed May 21 08:27:17 2008
From: exhuma at gmail.com (Michel Albert)
Date: Wed, 21 May 2008 05:27:17 -0700 (PDT)
Subject: qrcode in python?
Message-ID: <6498df89-1298-445b-9674-f4d92e0cd298@x41g2000hsb.googlegroups.com>

I am planning to write a python-module for python as I haven't found
anything on the tubes so far. If anyone has any interesting insight on
this topic, replies are welcome! ;)

Q: What is QR-Code?
A: http://www.denso-wave.com/qrcode/qrstandard-e.html

So far (as of May 21st 2008):

Google  (1 sensible hit): http://mail.python.org/pipermail/python-list/2006-May/385258.html
The Cheese shop (nothing): http://pypi.python.org/pypi?%3Aaction=search&term=qrcode&submit=search
Sourceforge (1 hit - no files/code): http://sourceforge.net/projects/qrcode/

I was planning to make use of qr-code in a web-application which is
written in python. So far I was not yet lucky to find any existing
module. I just contacted the project lead of http://sourceforge.net/projects/qrcode/
on this topic as well. Let's see what he replies.

So..... any pointers/ideas ?


From KyleMcG at gmail.com  Wed May  7 22:14:35 2008
From: KyleMcG at gmail.com (Kyle McGivney)
Date: Wed, 7 May 2008 19:14:35 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <e04ba51f-30a0-44fa-aade-c2fb6c99f944@26g2000hsk.googlegroups.com>

> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
> lisp's keywords ?let?, is based on the English word ?let?. That word
> is one of the English word with multitudes of meanings. If you look up
> its definition in a dictionary, you'll see that it means many
> disparate things. One of them, as in ?let's go?, has the meaning of
> ?permit; to cause to; allow?. This meaning is rather vague from a
> mathematical sense. Mathematica's choice of Module, Block, is based on
> the idea that it builds a self-contained segment of code. (however,
> the choice of Block as keyword here isn't perfect, since the word also
> has meanings like ?obstruct; jam?)

If the purpose of let is to introduce one or more variable bindings,
then I don't see how changing to block or module would improve
anything. I've always found it fairly intuitive to parse (let ((x
5)) ...) to "let x be five". Additionally, replacing let with the
synonyms you provided would approximately yield "permit x to be five"
or "allow x to be five". In my mind you have constructed an argument
in favor of let here (obviously it's better than block, because
nobody's going to come along and be confused about whether let will
"obstruct" or "jam" them :)

There are many easy targets to poke at in the CL spec. let isn't one
of those.


From alex.m.gusarov at gmail.com  Mon May 26 11:37:04 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 22:37:04 +0700
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <ac6dcb3d0805260837y25261922g2ed17432a942f1be@mail.gmail.com>

Hello, I have strong .NET background with C# and want to do some familiar
things from it with Python, but don't know how. For example, I created form
in qt designer with QCalendarWidget, translated it into Python module and
want to overload virtual method paintCell of QCalendarWidget. In C# I can
write following (abstract) code:

this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);

void myPaintCellHandler(object sender, PaintEventArgs e) {
    // some work here
}

I can't find how I can do similar thing in Python without inheriting
QCalendarWidget and overloading this method in inherited class (it's long
and I must create additional class). So, I need to run my code whenever
paintCell is called by Qt internals and I have no enough experience with
Python for it. Please, give me some advice, I know Python must be good
enough to do such things.

--
Best regards, Alex Gusarov
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From clyfish at gmail.com  Fri May  9 02:39:48 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Thu, 8 May 2008 23:39:48 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com> 
	<8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com> 
	<mailman.743.1210239613.12834.python-list@python.org>
Message-ID: <122616fb-29a1-4532-9e16-845c596b56ad@z24g2000prf.googlegroups.com>

On 5?8?, ??5?39?, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Wed, 07 May 2008 23:29:58 -0300, <clyf... at gmail.com> escribi?:
>
>
>
> > On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
> > wrote:
> >> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>
> >> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> >> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> >> > print p2.stdout.read()
>
> >> > It doesn't work.
> >> > Because subprocess.Popen execute "find" like this.
>
> >> > C:\>find \"445\"
>
> >> > It adds a '\' before each '"'.
> >> > How to remove the '\'?
> >> > Thank you.
>
> >> cannot help with the backslashes but try findstr instead of find
>
> > Thank you.
> > findstr doesn't need quotes, so it works.
>
> Build the command line yourself -instead of using a list of arguments-. Popen doesn't play with the quotes in that case:
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE) # using list
> p2 = Popen('find "445"', stdin = p1.stdout, stdout = PIPE) # using str
> print p2.communicate()[0]
>
> --
> Gabriel Genellina

Thanks very much.
You solved my problem.


From bellman at lysator.liu.se  Tue May 20 10:21:05 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Tue, 20 May 2008 14:21:05 +0000 (UTC)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
Message-ID: <g0umoh$i0s$1@news.lysator.liu.se>

"John Salerno" <johnjsal at NOSPAMgmail.com> writes:

> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
> news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
>> the above code is pretty much of a no-no because it has quadratic runtime
>> behavior.

> What's that mean, exactly?

It means that running time will increase with the square of the
problem size.  2.000.000 items will take 4 times as long as
1.000.000 items, and 5.000.000 items will take 25 times as long
as 1.000.000 items.

> Are you referring to both examples, or just the
> second one?

The problem is that the lookup you did to see if an item had
already been seen, is done by a linear search of a list.  The
search time is linearly proportional to the number of items on
the list 'new', but since the number of times you do that search
increases with the length of the input, the total runtime for
your function increases even more.

This thus applies to both your examples, since they really do the
same thing.

However, it actually depends on what your input is.  For the
runtime to increase with the square of the input length in your
function, the number of *unique* items on the input must be a
constant fraction of the input length.  By that I mean that, for
example, 5% of the input items are unique, so that if your input
is 100 items, then the list 'new' will be 5 items at the end of
the function, and if your input is 5.000.000 items, then 'new'
will become 250.000 items long.

This might not be the case in your use.  If you for example know
that the input only consists of integers between 0 and 10, then
'new' will never become longer than 11 items, regardless of
whether the input is 20 or 20.000.000.000 items.  The runtime of
your function then suddenly becomes linear in the problem size
instead of quadratic.

Even so, maintaining the set of already seen items as a set is
likely to be faster than keeping them as a list, even for a
fairly small number of unique items.

One small exception from this, though.  If only maintaining one
data structure (the ordered list 'new' in your code) makes your
working set fit within the processor cache, while maintaining two
data structures (a list for keeping the order, and a set for
searching) will make it *not* fit within the cache, then it
*might* actually be faster to just maintain the list.  Unlikely,
but not entirely impossible, and just a small change of the
problem size can change the balance again.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"What sane person could live in this world   !  bellman @ lysator.liu.se
 and not be crazy?"  -- Ursula K LeGuin      !  Make Love -- Nicht Wahr!


From pistacchio at gmail.com  Wed May  7 09:27:36 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 15:27:36 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
Message-ID: <fvsaoa$g46$1@aioe.org>

Mike Driscoll ha scritto:
> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>> hi! i'm a php user and a python programmer. i'd love to use python for
>> my server side needs but i can't seem to find what i'm looking for. for
>> most of my php work i use mysql and tinyButStrong
>> (http://www.tinybutstrong.com) which is a very lightweight template
>> engine that offers powerful functionalities. you insert TBS tags in web
>> pages like:
>>
>> <div align="center" class="title-page"> [var.x] </div>
>>
>> and it replaces [var.x] with the value of global variable x. it also
>> makes blocks (and nested blocks) easy to implement:
>>
>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>> [blk1;block=end] </p>
>>
>> in the previous code it cycles throu all the values of the array blk1.
>>
>> it does many more things, like htlm escaping, url and js encoding etc,
>> conditional displaying etc, but it is not more confusing that inserting
>> pieces of code into the HTML (aka: littering the code and kissing
>> goodbye to the code/presentation separation). it comes in the form of a
>> single file with a single class that you can easily include in the code
>> and go.
>>
>> now, i've searched the net and it seems full of python-based frameworks
>> for doing server side scripting and templating, but none that suits my
>> needs.
>>
>>     1. i like writing code and i like control. i mean, open up the
>> simplest text editor and write in it. i don't want something that is
>> command-line driven or that writes code for me like ">>>
>> makePagesFromThisDatabase()".
>>     2. i want something very lightweight. i don't want dozen of options,
>> pre-made blogging parts ecc. i just need a good non invasive template
>> engine and the basic functions for server side scripting, like session
>> managing, request parsing, functions to manipulate html code (encodings etc)
>>     3. i don't want to beg my hosting provider to install the libraries.
>> a simple include file should do the work.
>>     4. object oriented programming is not required (better: i prefer
>> plain old procedural programming).
>>
>> any help? thanks in advance
> 

hi, thanks for replaying

> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
> and Genshi in 2.x (I think) for templating purposes. There's also
> Cheetah, one of the more powerful Python templating engines out there.
> 

django is exacly the kind of giant i'm trying to avoid

> http://genshi.edgewall.org/

the first lines of the tutorial read:
"First, make sure you have CherryPy 3.0.x installed"
Now, cherrypy is something that is not properly "include a file and get 
going!"

> http://www.kid-templating.org/

kid seems to have a non-linear approach, but i may give it a try

> http://www.cheetahtemplate.org/

cheetah was something that i already considered using. have i to 
"install" it or can i just import it?

> http://turbogears.org/

same problem as with django!

> 
> Maybe those links will get you going.
> 
> Mike


From pavlovevidence at gmail.com  Wed May  7 03:26:04 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 00:26:04 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com>
Message-ID: <15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com>

On May 7, 2:39 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> vivai... at gmail.com (Ville M. Vainio) writes:
>
> > In practice, the probability of hijacking of source code by an evil
> > corporation is very low for most projects. And even when it did
> > happen, the evil corporation would likely submit patches.
>
> If they're going to submit patches then they shouldn't have any problem
> with the GPL.

Nonsense.  They could be more than willing to contribute their
patches, but aren't willing to accept the GPL's limitation to being
used only in open source packages.

LGPL?  No, there is probably no reason to have a serious problem with
that if you're going to submit patches, but GPL, yes.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Mon May 12 03:00:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 04:00:21 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> escribi?:

> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
>
>
> is there a better way than my solution? is mine ok?

Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.

(We used this question last year - some people gave a sensible answer in less than 5 minutes, but others did not even know how to start)

-- 
Gabriel Genellina



From gnewsg at gmail.com  Thu May 22 08:58:19 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Thu, 22 May 2008 05:58:19 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
	<ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>
	<g13fsc$onq$1$8300dec7@news.demon.co.uk>
Message-ID: <bc564641-859c-450c-8bd1-0dc63085cf16@56g2000hsm.googlegroups.com>

On 22 Mag, 11:54, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> After os.path.exists, you need to check it _is_ a
> file, and not a directory.
>
>
>
> Giampaolo Rodola' wrote:
> > On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
> >> what are the simple ways?
> >> I could think of os.open(), os.exec(touch file)
>
> >> are there any simpler methods?
>
> > Just use os.path.exists to check for file existence and open() as
> > replacement for touch.
>
> >>>> import os
> >>>> if not os.path.exists('file'):
> > ... ? ? open('file', 'w').close()
> > ...
>
> > --- Giampaolo
> >http://code.google.com/p/pyftpdlib/- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -

Yeah, I forgot. :\


--- Giampaolo
http://code.google.com/p/pyftpdlib


From bj_666 at gmx.net  Sun May 25 03:32:49 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 May 2008 07:32:49 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
Message-ID: <69sj10F34jb08U3@mid.uni-berlin.de>

On Sun, 25 May 2008 00:10:45 -0700, notnorwegian wrote:

> sets dont seem to be so good because there is no way to iterate them.

Err:

In [82]: for x in set(['a', 'b', 'c']):
   ....:     print x
   ....:
a
c
b

Ciao,
	Marc 'BlackJack' Rintsch


From inhahe at gmail.com  Sun May 18 07:37:37 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 07:37:37 -0400
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
Message-ID: <3xUXj.11305$hv2.9481@bignews5.bellsouth.net>


"Sanoski" <Joshuajruss at gmail.com> wrote in message 
news:1449c36e-10ce-42f4-bded-99d53a0a2569 at a1g2000hsb.googlegroups.com...
> I'm pretty new to programming. I've just been studying a few weeks off
> and on. I know a little, and I'm learning as I go. Programming is so
> much fun! I really wish I would have gotten into it years ago, but
> here's my question. I have a longterm project in mind, and I wont to
> know if it's feasible and how difficult it will be.
>
> There's an XML feed for my school that some other class designed. It's
> just a simple idea that lists all classes, room number, and the person
> with the highest GPA. The feed is set up like this. Each one of the
> following lines would also be a link to more information about the
> class, etc.
>
> Economics, Room 216, James Faker, 3.4
> Social Studies, Room 231, Brain Fictitious, 3.5
>
> etc, etc
>
> The student also has a picture reference that depicts his GPA based on
> the number. The picture is basically just a graph. I just want to
> write a program that uses the information on this feed.
>
> I want it to reach out to this XML feed, record each instance of the
> above format along with the picture reference of the highest GPA
> student, download it locally, and then be able to use that information
> in various was. I figured I'll start by counting each instance. For
> example, the above would be 2 instances.
>
> Eventually, I want it to be able to cross reference data you've
> already downloaded, and be able to compare GPA's, etc. It would have a
> GUI and everything too, but I am trying to keep it simple right now,
> and just build onto it as I learn.
>
> So lets just say this. How do you grab information from the web, in
> this case a feed, and then use that in calculations? How would you
> implement such a project? Would you save the information into a text
> file? Or would you use something else? Should I study up on SQLite?
> Maybe I should study classes. I'm just not sure. What would be the
> most effective technique?


People usually say BeautifulSoup for getting stuff from the web.  I think I 
tried it once and had some problem and gave up.  But since this is XML I 
think all you'd need is an xml.dom.minidom or xml.etree.ElementTree. i'm not 
sure which is easier.  see doc\python.chm in the Python directory to study 
up on those.  To grab the webpage to begin with you'd use urllib2.  That 
takes around one line of code.  I wouldn't save it to a text file, because 
they're not that good for random access.  Or storing images.  I'd save it in 
a database.  There are other database modules than SQLite, but SQLite is a 
good one, for simple projects like that where you're just going to be 
running one instance of the program at a time.  SQLite is fast and it's the 
only one that doesn't require a separate database engine to be installed and 
running.
Classes are just a way of organizing code (and a little more, but they don't 
have a lot to do with saving stuff to file).
I'm not clear on whether the GPA is available as text and an image, or just 
an image.  If it's just available as an image you're going to want to use 
PIL (Python Image Library).  Btw, use float() to convert a textual GPA to a 
number.
You'll have to learn some basics of the SQL language (that applies to any 
database).  Or maybe not with SQLObject or SQLAlchemy, but I don't know how 
easy those are to learn.  Or if you don't want to learn SQL you could use a 
text file with fixed-length fields and perhaps references to individual 
filenames that store the pictures, and I could tell you how to do that.  But 
a database is a lot more flexible, and you wouldn't need to learn much SQL 
for the same purposes.
Btw, I used SQLite version 2 before and it didn't allow me to return query 
results as dictionaries (i.e., indexable by field name), just lists of 
values, except by using some strange code I found somewhere.  But a list is 
also easy to use.  But if version 3 doesn't do it either and you want the 
code I have it.




From paul at boddie.org.uk  Tue May 20 17:17:47 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Tue, 20 May 2008 14:17:47 -0700 (PDT)
Subject: self.var hmm?
References: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>
Message-ID: <e754a463-04ce-4c2f-85a1-21027b6bee43@s33g2000pri.googlegroups.com>

On 20 Mai, 22:58, notnorweg... at yahoo.se wrote:
> class TaskGroup:
>     def __init__(self):
>         self.group = []
>
>     def addTask(self, task):
>         self.group.append(task)
>
> is this wrong? i have a program thats too big to post but should i
> just do group.append in addTask?

No, you have to do self.group.append, since group isn't a local
variable in the addTask method, and I doubt that you'd want addTask to
make changes to any global variable called group, which is what might
happen otherwise - that could be a source of potential problems, so
you need to be aware of that!

> reason is when later doing TaskGroup.group i get None

TaskGroup.group would be referencing a class attribute called group,
which is "shared" by all TaskGroup instances (and the TaskGroup class
itself, of course). What you need to do is to access the instance
attribute called group via each instance, and the self.group notation
does exactly that: self is the reference to a particular instance (in
the addTask method, it's the instance used to call the addTask
method).

You might wonder why Python doesn't know inside a method that group is
a reference to an instance attribute of that name. The reason,
somewhat simplified, is that Python only has assignments to populate
namespaces (such as the contents of an instance), whereas languages
which employ declarations (such as Java) would have you list the
instance attributes up front. In these other languages, the compiler/
interpreter would know that you're executing a method belonging to an
instance of a particular class, and it would also know what names to
expect as references to class and instance attributes.

Anyway, I hope this makes more sense now than it did a few moments
ago. :-)

Paul


From pistacchio at gmail.com  Mon May 12 04:10:00 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 01:10:00 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>
Message-ID: <a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com>

On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> > hi to all!
> > can i load a module passing to it, automatically and as default, all
> > the caller's global variables to act as module's global variables?
> > thanks
>
> module = __import__('module', globals=globals())
>
> I think that's what you're looking for.
>
> - alex23


hmm, well, maybe yes.. should i ovveride the standard import function
of the module?
say that the module is called "pycatrix", would adding this to the
module solve the problem?

def __import__('pycatrix', globals=globals()):



From gherron at islandtraining.com  Tue May 27 13:31:40 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 10:31:40 -0700
Subject: New chairman
In-Reply-To: <g1hg3r$orp$1@ger.gmane.org>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>	<mailman.1648.1211899834.12834.python-list@python.org>	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<g1hg3r$orp$1@ger.gmane.org>
Message-ID: <483C457C.4060006@islandtraining.com>

Max M wrote:
> Sverker Nilsson skrev:
>> I was talking about Guido van Rossum
>>
>> The one who decides, so far when people agree
>
> I have been using Python since the nineties. I cannot remember when I 
> have had to rewrite old code because of changes in the language.
>
> At the same time I have been feeling as if I was sitting in a time 
> machine watching other languages whoosh by at breakneck speed.
>
> Entire technologies have been developed to make programming as 
> practical and easy as it has been in Python the entire time.
>
> So I find it hard to see exactly what it is that Guido is doing wrong?
>
Please don't feed the trolls.   
(http://en.wikipedia.org/wiki/Internet_troll#Troll_FAQs)




From johnjsal at NOSPAMgmail.com  Mon May 19 23:54:24 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:54:24 -0400
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com>
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
	<3b0ba35b-c2b9-4ab2-8e7c-fecebce465c2@d77g2000hsb.googlegroups.com>
Message-ID: <20080519235424.8addcf12.johnjsal@NOSPAMgmail.com>

On Sun, 18 May 2008 23:08:11 -0700 (PDT)
s0suk3 at gmail.com wrote:

> Every now and then, however, I do build some interface (mostly GUI),
> such as a monitor, notification mechanism, etc. But I never feel like
> I'm losing focus on the actual problem; maybe because I develop the
> core program first and the think about a possible and optional
> interface. Maybe a good suggestion is to put the GUI stuff on another
> module or package, and make interface functions or methods to handle
> the needed GUI controls, so that the GUI stuff shows up as little as
> possible in the core part of the program.

I certainly don't *not* like GUI programming. In fact, learning wxPython was really fun and interesting and I enjoy GUI stuff. And after learning about XRC (putting the GUI component in a separate XML file, away from the program logic) that helped me learn how to keep things separate as well. I even wrote a tutorial on how to use XRC with wxPython! :)


From castironpi at gmail.com  Thu May 15 19:56:42 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:56:42 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
	<482C7D93.2080809@behnel.de>
Message-ID: <67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>

On May 15, 1:14?pm, Stefan Behnel <stefan... at behnel.de> wrote:
> castiro... at gmail.com wrote:
> > What do we render?
>
> Sur.
>
> Stefan

I'm pretty sure 'inputs' come from the real world.  I guess the fear
would be my hands aren't happy.  Concerns include age fitity, a
propriety, and making up words.  Blah?


From nick at craig-wood.com  Tue May  6 17:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 06 May 2008 16:30:03 -0500
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr>
	<mailman.635.1210062200.12834.python-list@python.org>
Message-ID: <slrng21gq2.g1h.nick@irishsea.home.craig-wood.com>

Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>  As such 2.6 & 3.0 are also cooking, but from what I see on the mailing
>  list, some of the features are a bit controversial. So if I start with
>  2.5 now, unless there are some break-thru preformance gains, or
>  annoying defects fixed, I'd stick to it. If I can do something
>  "well-enough" with 2.5, I'd not refactor for 2.6, for quite some
>  fore-seeable future.

I started programming with python at version 2.0 so I've seen it
evolve over the years.

In case you are interested here are some links to what has changed
from the different versions over the years.

 2.0: http://www.amk.ca/python/2.0/
 2.1: http://www.amk.ca/python/2.1/
 2.2: http://www.python.org/doc/2.2.3/whatsnew/
 2.3: http://www.python.org/doc/2.3/whatsnew/
 2.4: http://www.python.org/doc/2.4.3/whatsnew/whatsnew24.html
 2.5: http://docs.python.org/whatsnew/whatsnew25.html
 2.5: http://docs.python.org/dev/whatsnew/2.6.html

I personally wouldn't like to use older than 2.2 any more.  I find new
style classes, iterators and generators to be invaluable.

Features I like from 2.3's are enumerate, csv and datetime modules.

And from 2.4 I like the subprocess module (though it runs on 2.3 just
fine too - it just isn't included).  I have occasionally used the
decorator syntax, but since it is syntactic sugar anyway it isn't
absolutely necessary.

In 2.5 has ctypes which is great though it is available as a 3rd party
module for 2.3 and 2.4.  As is sqlite3.

So in my opinion the real difference between the 2.2, 2.3, 2.4 and 2.5
are the built in modules.  The actual language changes are very minor.

If you write your code for 2.5 which is probably a good idea, you'll
have no problem backporting it to 2.4, 2.3 or even 2.2 should that be
necessary.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gherron at islandtraining.com  Wed May  7 15:41:17 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 07 May 2008 12:41:17 -0700
Subject: Idea for P3K
In-Reply-To: <4821fea4$0$880$ba4acef3@news.orange.fr>
References: <4821d418$0$932$ba4acef3@news.orange.fr>	<m2k5i6561z.fsf@googlemail.com>
	<4821fea4$0$880$ba4acef3@news.orange.fr>
Message-ID: <482205DD.90506@islandtraining.com>

M?ta-MCI (MVP) wrote:
> Hi!
>
>> I don't often feel like using this word
>
> Look at languages like OCAML or F #
>
> @-salutations
Well of course, we're all well aware of other languages that allow 
variables to be bound in the middle of an expression.  It's just that 
Python was purposely created without that (mis)feature because it's so 
unclear, and easy to abuse.  Most of us in the community support that 
point of view and would fight the introduction of such a feature into 
Python.

Gary Herron




From martin at v.loewis.de  Sun May 25 11:01:33 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 17:01:33 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <4ob*BLLds@news.chiark.greenend.org.uk>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
	<4ob*BLLds@news.chiark.greenend.org.uk>
Message-ID: <48397F4D.8040009@v.loewis.de>

>>> I guess, Apache does some kind of memory caching for files, which are often
>>> requested and small enough to fit into the system memory.  May be, that's
>>> what the OP is referring to ...
> 
>> I'm not aware of that, and I even more seriously doubt it. Because 
>> caching is a complicated, domain-dependend subject that would 
>> *immediately* cry for configuration - e.g. caching strategies and such.
> 
> This is available in current apache with mod_file_cache (for an
> explicitly configured list of files). I think the circumstances where
> you'd want to use it are quite rare.

Interestingly enough, this *doesn't* do memory caching for files.
Instead, it either keeps the file handle open, so you can seek to the
beginning of the file on the next request (avoiding the directory
lookup), or you can mmap the file. However, even if you mmap the file,
it is still the operating system's choice whether or not to cache the
file contents in memory.

Regards,
Martin


From paul at boddie.org.uk  Mon May  5 18:47:32 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 5 May 2008 15:47:32 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <803a75aa-9de6-45e5-bb0a-a2512f8bdd32@m36g2000hse.googlegroups.com>

On 5 Mai, 23:57, vivai... at gmail.com (Ville M. Vainio) wrote:
> Paul Boddie <p... at boddie.org.uk> writes:
> > Anyway, I'm just confirming that I'm clearly not one of the "many"
> > described above. A lot of my own work is licensed under the GPL or
>
> I guess it's safe to assume that you are not opposed to using code
> based on more liberal license, right? :-)

As long as it's a GPL-compatible licence. ;-)

> My point is: GPL is a reason to reject a tool for some, but MIT/BSD
> never is. Ultimately, of course, it's up to the preferences of the
> author but if the idea is to maximize the popularity, GPL is a worse
> bet.

I know you were talking about small tools, but since we're being
jocular, I still can't resist the obligatory "tell it to Linus
Torvalds" remark. :-)

Paul

P.S. I've actually released at least one work derived from a
permissively licensed work under the LGPL (and I did ask the original
author if he had any problems with that, out of politeness), mostly
because I didn't object to people building applications under a wider
range of licences, but I did want end-users to get the benefit of the
library source code, including any modifications.


From larry.bates at websafe.com`  Thu May 29 21:27:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 29 May 2008 20:27:35 -0500
Subject: Help needed in choosing an algorithm for Cryptographic services.
In-Reply-To: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
Message-ID: <CJadncwpIrSQxaLVnZ2dnUVZ_u6dnZ2d@comcast.com>

abhishek wrote:
> Hi group, recently my employer asked me too implement encryption/
> decryption for secure data transfer over internet. Problem is that the
> client application is written using C# and the webserver where i need
> to store the information is developed using python.
> 
> My situation of dilemma is which cryptographic method suits me best
> for this purpose.
> 
> Help/Suggestions are urgently required
> 
> Thank you ,
> Abhishek

Languages don't have anything to do with "what is best method".  It depends
on your application requirements.  If all you want is secure data "transfer"
just use SSL to encrypt the information while being transmitted.  If you wish
to have the data "stored encrypted" look into PGP.

-Larry


From deets at nospam.web.de  Wed May 21 14:52:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 20:52:03 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <69j9b6F33ckopU1@mid.uni-berlin.de>

Mark Dickinson schrieb:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
> 
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> a = 1e16-2.
>>>> a
> 9999999999999998.0
>>>> a+0.999     # gives expected result
> 9999999999999998.0
>>>> a+0.9999   # doesn't round correctly.
> 10000000000000000.0
> 
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?

It is working under OSX:

(TG1044)mac-dir:~/projects/artnology/Van_Abbe_RMS/Van-Abbe-RMS deets$ python
Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>> a = 1e16-2.
 >>> a
9999999999999998.0
 >>> a+0.9999
9999999999999998.0
 >>>

But under linux, I get the same behavior:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Welcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
 >>> a = 1e16-2.
 >>> a+0.9999
10000000000000000.0
 >>>


So - seems to me it's a linux-thing. I don't know enough about 
IEEE-floats to make any assumptions on the reasons for that.

Diez


From johnjsal at NOSPAMgmail.com  Mon May 19 23:48:03 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 May 2008 23:48:03 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <20080519234803.5734b65f.johnjsal@NOSPAMgmail.com>

On Mon, 19 May 2008 20:20:28 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> To whit: you pointed out the awkwardness in Python of having to
> declare a for-loop variable when you only wanted to loop a specific
> number of times and didn't need the variable.

Well, I wasn't so much trying to point out an awkwardness as I was asking if anyone really *found* it awkward. And of course, my question also raises the question of whether or not it's good programming to simply want to do something a certain number of times. I suppose that situation may come up, but I wonder if it can be implemented in a more significant way than simply doing something X number of times.


From matt at tplus1.com  Mon May 12 12:10:21 2008
From: matt at tplus1.com (Matthew Wilson)
Date: Mon, 12 May 2008 16:10:21 GMT
Subject: In metaclass, when to use __new__ vs. __init__?
Message-ID: <slrng2gqvd.h3o.matt@sprout.tplus1.com>

I have been experimenting with metaclasses lately.  It seems possible to
define a metaclass by either subclassing type and then either redefining
__init__ or __new__. 

Here's the signature for __init__:

    def __init__(cls, name, bases, d):

and here's __new__:

    def __new__(meta, classname, bases, d):

Every metaclass I have found monkeys with d, which is available in both
methods.  So when is it better to use one vs the other?

Thanks for the help.

Matt

--
Programming, life in Cleveland, growing vegetables, other stuff.
http://blog.tplus1.com


From gagsl-py2 at yahoo.com.ar  Mon May 19 09:21:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 10:21:56 -0300
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
Message-ID: <op.ubekqu2ox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 19 May 2008 06:59:22 -0300, sandeep <shiningsandy at gmail.com> escribi?:

> the py code that i have written is here.when i run this code i wont
> get any errors it just works fine for me.but when i created the exe i
> start getting an error in my 'getMailContent' function. The error
> description is
>
> TypeError:unsupported operand type(s) for :- 'instance' and 'int'
>
> i dont know why i am start getting this error when i run it through
> the exe.

By example, your code uses os.getcwd() - so it depends on the current dir. Try running it from a different directory. Don't focus too much on the ".exe" vs ".py" difference: it might not be relevant, the error may reside elsewhere.

Please post the complete exception message *and* traceback. Don't retype it; copy and paste the message from the console. Your message above doesn't appear to be correctly typed, it says `:-` but Python would print `-:` and I don't see any `-` operation in your code that could fail in that way.

Also, don't do this:

>     try:
>         mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
>     except BaseException:
>         print BaseException

because you're completely hiding important information about *what* happened.

-- 
Gabriel Genellina



From jon at ffconsultancy.com  Thu May  1 12:50:32 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 01 May 2008 17:50:32 +0100
Subject: pop langs website ranking
References: <41fbaf27-a80b-402b-b406-c048a65a8643@b64g2000hsa.googlegroups.com>
	<2819d214-1208-4552-9b59-122e980e01d4@t12g2000prg.googlegroups.com>
Message-ID: <x6SdnUwlzLGga4TVRVnyhQA@plusnet>

xahlee at gmail.com wrote:
> Alexa's data is more reliable than quantcast.

Alexa claim to have accurate data on lots of sites but I just tried to
correlate their data with the exact data on our web server and the
discrepancies are huge. For example, combining our number of absolute
visitors with their measure of "reach" for our site indicates that there
are 58 billion internet users.

So their data are not even order-of-magnitude accurate. The only web analyst
I ever met was an astrophysicist so this does not really surprise me. ;-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From manthra.mohan at gmail.com  Thu May  1 15:06:07 2008
From: manthra.mohan at gmail.com (Krishna)
Date: Thu, 1 May 2008 12:06:07 -0700 (PDT)
Subject: data manipulation
Message-ID: <083cef9c-6bfe-4a1f-afc0-7384c043dc6d@u12g2000prd.googlegroups.com>

I have a script that reads an excel file and and do manipulations on
it. But, now, I have a text file that needs the same manipulation. I
tried the same script, but it will not work, when I use command such
as: workbook = xlrd.open_workbook('C:/trial.txt'), its giving me
errors saying "expected BOF record". I was wondering how to work
around this. Do I have to do some format conversion to accomplish this
or am I missing something

Thanks
Krishna


From Caseyweb at gmail.com  Fri May  9 19:45:09 2008
From: Caseyweb at gmail.com (Casey)
Date: Fri, 9 May 2008 16:45:09 -0700 (PDT)
Subject: Problem with help() in python/ipython interpreters
Message-ID: <62818f52-025a-48b1-b451-70abae1e6580@a23g2000hsc.googlegroups.com>

I'm running python 2.5.2 on WinXP.  I've always used a GUI for
interactive development, but I wanted to try out ipython which better
supports matplotlib in this mode.  Unfortunately, whenever I try to
use help() I get the following error:

(Sys) The system cannot find the file specified.
 "C:\documents"

It turns out that the regular (python.exe) interpreter has the same
problem.  I have the HTML docs installed, my PYTHONDOCS environment
variable points to the HTML directory, and I actually uninstalled and
reinstalled every library I use from scratch to make sure it wasn't
some random config issue.

The error message leads me to believe that the help() function is
trying to access something in my windows user directory structure (C:
\Documents and Settings\<username>\...) and is having problems with
the embedded space.  The really strange thing is that my python
directory is rooted at c:\python25 including my html docs. I know that
ipython does by default create a profile directory in %HOME%\_ipython
but that doesn't seem to be a problem and wouldn't impact the default
python.exe interpreter.

Any ideas?


From dannywebster at googlemail.com  Tue May 13 07:14:16 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 04:14:16 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1043.1210676114.12834.python-list@python.org>
Message-ID: <c8d3628f-8d7a-4eae-aa16-bbd8f16b54b5@u36g2000prf.googlegroups.com>

On May 13, 11:51 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
> You meant readlines(), I presume. A file acts as its own iterator:
>
> f=os.open("./get_hostnames")
> try:
>    for line in f:
>      # do something with line
> finally:
>    f.close()
>
> --
> Gabriel Genellina

Hi - thank you for your reply.

I meant:

f=os.popen("./get_hostnames").readlines()

So f is a list, rather than a file object, of which os.open would have
returned (my initial typo redirected the missive of this post, sorry!)

cheers




From kyosohma at gmail.com  Fri May 16 09:15:41 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:15:41 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<322a200a-ed9a-44d2-b5ea-5f059884b53a@27g2000hsf.googlegroups.com>
Message-ID: <826cf534-a674-4861-8d60-5f6a4be30125@d77g2000hsb.googlegroups.com>

On May 16, 1:51?am, Chris <cwi... at gmail.com> wrote:
> On May 15, 5:13?pm, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > Hi,
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> > shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> > Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to Firefox
> > out, it works too. Is there another method I can use other than
> > creating the shortcut by hand and using the shutil module?
>
> > Thank you for any ideas.
>
> > Mike
>
> Don't set arguments in the path.
>
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.TargetPath = r'Program Files\Mozilla Firefox\firefox.exe'
> shortcut.Arguments = r'https:\www.myCompanyWebsite.com\auth
> \preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> shortcut.save()

Ah. I was unaware of the Arguments parameter. That works quite well.
Where does one find this information anyway? I think I found mine from
bits and pieces scattered in various tutorials.

Thanks a lot.

Mike


From patrickstinson.lists at gmail.com  Mon May 26 15:17:38 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Mon, 26 May 2008 11:17:38 -0800
Subject: definition of a highlevel language?
In-Reply-To: <34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com>
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com>
Message-ID: <6214d7a20805261217x14021c2bx643a07166d69ac9c@mail.gmail.com>

The way I think of it is that a language is commonly referred to by the
implementation of syntax and semantics. The implementation is defined by
a processable medium, for example 1) punch cards, 2) processor-specific
code, or 3) some processor code interpreting some other code.
Examples include:

1) I'm too young to know :)
2) common low-level language like C
3) common high-level like python

ikke norska? kvorfor ikkje? itne? hva for noke?

On Mon, May 26, 2008 at 11:02 AM, <notnorwegian at yahoo.se> wrote:

> On 26 Maj, 20:57, miller.pau... at gmail.com wrote:
> > On May 26, 2:34 pm, notnorweg... at yahoo.se wrote:
> >
> > I wanted to address some other points I failed to mention in my first
> > response.
> >
> > > so are they fundamentally differently built or is it just a lot of
> > > lowlevel operations built on top of each other?
> >
> > Partly.  A high-level language is essentially one that gives you high-
> > level operations, like "apply the function f to each element of the
> > sequence seq, and return [f(seq[0]), f(seq[1]), ... f(seq[n])].
> >
> > But, it's more than that.  (You use Haskell as your example, but I'll
> > use Python because I know it roughly a million percent better than
> > Haskell... hehe.)  In Python, you have support from the language to
> > treat functions as first-class objects; in C, you explicitly cannot do
> > this -- to map an arbitrary function over a sequence, you're
> > restricted to accessing the function through a pointer.  On the
> > surface, it's the same operation, but that extra level of indirection
> > can really bog one's mind down.  Think about how difficult it is for a
> > human to interpret the declaration of a function pointer in C, for
> > instance.
> >
> > > haskell is considered a very highlevellanguage but can you do
> > > systemsprogramming with it(yes maybe it is very unpractical i dont
> > > know but can you)?
> > > is lambda calculus a more abstract and efficient way of modeling a
> > > computer?
> >
> > Lambda calculus doesn't model computers.  It models *computation*.
> > That is, given a Turing machine, there's a set of functions in the
> > lambda calculus, which, when suitably combined, will yield the exact
> > same result as the original Turing machine.  That doesn't in any way
> > imply that Turing machines work by interpreting lambda calculus.
> >
> > > how did lispmachines work? was the basic system programmed in LISP?
> >
> > Yes, the whole kit and kaboodle, all the way down to the microcode was
> > programmed in LISP.  In principle, there's no reason we couldn't have
> > Haskell machines or Python machines.  It's just that nobody's been
> > crazy enough to do it, that I know of. :-)
>
>
> what is crazy about it?
>
> in the same way programming webapps in C would be annoying because you
> have to do a lot of lowlevel tasks it is dumb to program computer ina
> highlevellanguage because you dont have direct access to lowlevel
> tasks meaning you cant program it very efficiently, ie make it fast?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From martin at v.loewis.de  Sun May 25 16:15:56 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:15:56 +0200
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <4839C8FC.2020408@v.loewis.de>

> ok where does the 1 in the come from?

http://www.python.org/doc/faq/general/#why-are-floating-point-calculations-so-inaccurate

Regards,
Martin


From ivlenin at gmail.com  Sun May 25 22:51:15 2008
From: ivlenin at gmail.com (I V)
Date: Mon, 26 May 2008 02:51:15 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
	<g1d3lf$1rpd$3@news.mtu.ru>
	<bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>
Message-ID: <DAp_j.2028$jI5.795@flpi148.ffdc.sbc.com>

On Sun, 25 May 2008 21:41:09 -0400, Jerry Stuckle wrote:
> The the good programmers are able to adapt to the language and make the
> most of whatever language they're using.  The result is good code. OTOH,
> poor programmers I have known have found all kinds of excuses - from the
> language itself to lack of requirements, to anything else they can
> blame, except the real root of the problem.

That's true - but I wonder if there might not be differences at the 
margins. Some languages (and, which is not quite the same but not easy to 
fully distinguish either, the communities around some languages) may 
encourage mediocre programmers to produce slightly more or less mediocre 
programs.

Some features of Python (the one that really stands out for me is not 
default-initializing variables on first use; the comparatively clean 
standard library might be another), and some features of the Python 
community (which, IME, has more members more explicitly committed to 
writing clean code) I think do make Python a better environment for us 
mediocre programmers.

But maybe I'm wrong - I've never been paid to write Python programs, 
whereas I have been paid to write PHP, so I might just be projecting my 
frustrations with work onto the language. I've also not used PHP5 much in 
anger, which does look to be a lot nicer than earlier versions.


From arne at vajhoej.dk  Fri May 30 21:35:47 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Fri, 30 May 2008 21:35:47 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
Message-ID: <4840ab73$0$90274$14726298@news.sunsite.dk>

Stephan Bour wrote:
> Lew wrote:
> } John Thingstad wrote:
> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
> } > I don't like the style, but many do.
> }
> } Please exclude the Java newsgroups from this discussion.
> 
> Did it ever occur to you that you don't speak for entire news groups?

Did it occur to you that there are nothing about Java in the above ?

Arne


From fuzzyman at gmail.com  Sun May 25 08:11:18 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 05:11:18 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<87tzgm3h4q.fsf@gmail.com>
Message-ID: <c808bc1b-79e2-486b-95da-2e3fb8cca032@m45g2000hsb.googlegroups.com>

On May 25, 9:47?am, vivai... at gmail.com (Ville M. Vainio) wrote:
> Fuzzyman <fuzzy... at gmail.com> writes:
> >> Perhaps a lint-like validation tool would be optimal for this
> >> problem...
>
> > So we can refuse to execute their code if they use private APIs?
>
> No, but it could complain and point out the exact offending lines,
> pointing their development effort to right direction.
>
> > Proxying so that we can really hide our internal APIs is a better
> > solution.
>
> How about pyprotocols and other interface packages?
>


We're using IronPython. I haven't looked at pyprotocols but I know the
Zope interface package is at least partly written in C. Our
spreadsheet object model is very 'performance sensitive', so that's a
consideration. We should definitely explore the prior art in this area
before we implement anything ourselves.

Thanks

Michael Foord
http://www.ironpythoninaction.com/

> Proxying is pretty workable too, and it easily makes sense that the
> official API objects should be different from the logic executing
> objects.



From woodygar at sky.com  Sat May 24 14:32:56 2008
From: woodygar at sky.com (garywood)
Date: Sat, 24 May 2008 19:32:56 +0100
Subject: for some reason the actual tries figure is not right 
Message-ID: <002301c8bdcc$979ce8c0$1300a8c0@Home>

can someone explain why the tries displays the wrong number
thanks 
orginally i started off with tries = 0 but it was off by 2  



# Word Jumble
#
# The computer picks a random word 
# The player has to guess the original word can give hint

import random
tries = 1
# create a sequence of words to choose from
word = ("python", "jumble", "xylophone", "difficult", "answer")
# pick one word randomly from the sequence
word = random.choice(word)
# create a variable to use later to see if the guess is correct
correct = word

# start the game
print \
"""
           Welcome to Word Jumble!
        
   
(Press the enter key at the prompt to quit.)
"""

if word == "python":
    hint = 'snake'
if word == "jumble":
    hint = 'mess'
if word == "difficult":
    hint = 'hard'
if word == "answer":
    hint = 'correct'
if word == "xylophone":
    hint = 'music'
     
    
guess = raw_input("\nYour guess: ")
guess = guess.lower()
while (guess != correct) and (guess != ""):
    print "Sorry, that's not it." + hint
    guess = raw_input("Your guess: ")
    guess = guess.lower()
if guess != correct:
    print hint
tries += 1
if guess == correct:
    print "That's it!  You guessed it!\n"

print "Thanks for playing."
print tries
raw_input("\n\nPress the enter key to exit.")
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080524/53cc782d/attachment-0001.html>

From usenet at janc.be  Fri May 16 18:03:22 2008
From: usenet at janc.be (Jan Claeys)
Date: Fri, 16 May 2008 22:03:22 GMT
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<68rmafF2t1vboU1@mid.uni-berlin.de>
Message-ID: <pan.2008.05.16.22.05.12@news.janc.be>

Op Mon, 12 May 2008 22:06:28 +0200, schreef Diez B. Roggisch:

> There is no way to interpret the JS in Python,

There is at least one way:
<http://wwwsearch.sourceforge.net/python-spidermonkey/>


-- 
JanC


From sposnjak at gmail.com  Mon May  5 10:30:37 2008
From: sposnjak at gmail.com (Simon Posnjak)
Date: Mon, 5 May 2008 16:30:37 +0200
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <20080505141651.6859.554247783.divmod.quotient.59048@ohm>
References: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>
	<20080505141651.6859.554247783.divmod.quotient.59048@ohm>
Message-ID: <725404980805050730n1efe320fpf03dec3735fc1875@mail.gmail.com>

On Mon, May 5, 2008 at 4:16 PM, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>
> On Mon, 5 May 2008 16:05:08 +0200, Simon Posnjak <sposnjak at gmail.com> wrote:
>
> > On Mon, May 5, 2008 at 3:48 PM, Jean-Paul Calderone <exarkun at divmod.com>
> wrote:
> >
> > > On Mon, 5 May 2008 15:41:08 +0200, Simon Posnjak <sposnjak at gmail.com>
> wrote:
> > >
> > > > Hi!
> > > >
> > > > I have a C module for which I created a wrapper with swig. The
> function
> > > def is:
> > > >
> > > > C:
> > > >
> > > > int some_thing(unsigned char * the_str);
> > > >
> > > > eg:
> > > >
> > > > Python:
> > > >
> > > > some_module.some_thing (the_str)
> > > >
> > > > Now I would like to feed it with a UTF-8 formatted string:
> > > >
> > > > test = u'Make \u0633\u0644\u0627\u0645, not war.'
> > > >
> > >
> > >  `test? is not a UTF-8 encoded string.  It's a unicode string.
> > >
> > >  To get a UTF-8 encoded string from a unicode string, use the `encode?
> > >  method:
> > >
> > >   some_module.some_thing(test.encode('utf-8'))
> > >
> >
> > Yes you are correct. It is unicode string. But still if I use encode I
> > get the same error:
> >
> > TypeError with message: in method 'some_thing', argument 1 of type
> > 'unsigned char *'
> >
> > So I am looking for a way to "cast" unicode string to unsigned char *.
> >
> >
>
>  You need to provide some more information about `some_module.some_thing?.
>  How is it implemented?  What Python type does it expect?  If it doesn't
>  take a unicode string and it doesn't take a byte string, I don't know
>  what kind of string it does take.

some_module.some_thing(the_string) function is a swig generated
function from a C lib. The C lib function expects unsigned char *.

The generated function is:

SWIGINTERN PyObject *_wrap_some_thing(PyObject *SWIGUNUSEDPARM(self),
PyObject *args) {
  PyObject *resultobj = 0;
  unsigned char *arg1 = (unsigned char *) 0 ;
  unsigned char result;
  void *argp1 = 0 ;
  int res1 = 0 ;
  PyObject * obj0 = 0 ;

  if (!PyArg_ParseTuple(args,(char
*)"O:cpot_printer_simple_printf",&obj0)) SWIG_fail;
  res1 = SWIG_ConvertPtr(obj0, &argp1,SWIGTYPE_p_unsigned_char, 0 |  0 );
  if (!SWIG_IsOK(res1)) {
    SWIG_exception_fail(SWIG_ArgError(res1), "in method '"
some_thing"" "', argument " "1"" of type '" "unsigned char *""'");
  }
  arg1 = (unsigned char *)(argp1);
  result = (unsigned char)some_thing(arg1);
  resultobj = SWIG_From_unsigned_SS_char((unsigned char)(result));
  return resultobj;
fail:
  return NULL;
}


From venkat83 at gmail.com  Fri May 16 07:22:17 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Fri, 16 May 2008 04:22:17 -0700 (PDT)
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
	<9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com> 
	<slrng2qet1.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <1ff9bbaa-ae04-495a-a9a3-d2f7741e6cc5@k10g2000prm.googlegroups.com>

On May 16, 7:45 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:

Thanks

> By picking better names, the config gets much more readable.
>
> The big advantage here is that a config file is something readable and editable
> without appearing it to be Python.
> If this is too low level for your users, you can use it as a data exchange
> format between the processing application and the frontend application where
> users can change the values.

The problem being, if i change the config file, then the configobj has
to reload this file again. I do not want to 'refresh' the config obj
per transaction but only when the config params change.

> > Now when i 'manually' make some changes to the value of a,b,c,d then
> > the the checkCutoff func should refer to the new values.
>
> Maybe reload the file each time you run the program?

The program is never-ending and do not think in terms of websites here
- probably something like a server/middleware which can never be
brought down.

I was thinking along the terms of an Interrupt driven program, which
when getting a custom interrupts reloads the file - any potential
loopholes/falls that anyone can anticipate?

Regards,
Venkat


From cshirky at gmail.com  Mon May 12 14:30:52 2008
From: cshirky at gmail.com (cshirky)
Date: Mon, 12 May 2008 11:30:52 -0700 (PDT)
Subject: buffering choking sys.stdin.readlines() ?
References: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
	<68r63qF2s4ksaU1@mid.uni-berlin.de>
Message-ID: <819bdd3b-ec6b-41a5-99ab-ac85f08b99a7@8g2000hse.googlegroups.com>

> readlines() reads all of the file into the memory. Try using xreadlines,
> the generator-version, instead. And I'm not 100% sure, but I *think* doing
>
> for line in sys.stdin

both work -- many thanks.

-clay


From larzluv at hotmail.com  Mon May 12 03:14:51 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Mon, 12 May 2008 00:14:51 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>
Message-ID: <18b87c2b-742d-458f-aee0-404249547baf@l42g2000hsc.googlegroups.com>

On May 12, 1:34 am, Larry Hale <larz... at hotmail.com> wrote:

> The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
> has the man pages...


Err...  I meant "http://downloads.sourceforge.net/gnuwin32/file-4.21-
bin.zip?modtime=1180175868&big_mirror=1"!  :)


From skanemupp at yahoo.se  Tue May 13 14:20:35 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 11:20:35 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <f77824d7-a832-4e8d-81c2-57265871e3bf@8g2000hse.googlegroups.com>

On 13 Maj, 19:10, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi


nasa, google, industrial light and magic(starwars second trilogy) ,
astra zeneca, reddit.


From lists at cheimes.de  Tue May 13 18:30:43 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 00:30:43 +0200
Subject: usage of python
In-Reply-To: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0d4qk$14n$1@ger.gmane.org>

Rajarshi schrieb:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
> 
> Is there any list with people/groups/companies using Python for
> impressive things?
> 
> Any pointers would be appreciated

Additionally to the other URLs:

http://highscalability.com/youtube-architecture
http://highscalability.com/google-architecture
http://www.ohloh.net/projects/python

Christian



From hdante at gmail.com  Sat May  3 16:13:04 2008
From: hdante at gmail.com (hdante)
Date: Sat, 3 May 2008 13:13:04 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com>
Message-ID: <b6567dd1-8cd1-4195-af8f-6b4bc6819a2e@25g2000hsx.googlegroups.com>

On May 3, 3:44?pm, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> Arnaud Delobelle wrote:
>
> > sum() works for any sequence of objects with an __add__ method, not
> > just floats! ?Your algorithm is specific to floats.
>
> This occurred to me also, but then I tried
>
> sum(['abc', 'efg'], '')
>
> and it did not work. ?Or is this just a special exception to prevent the
> ? misuse of sum to join strings? ?(As I said, I'm only an occasional user.)
>
> Generally, sum() seems to be most useful for numeric types (i.e. those
> that form a group with respect to __add__ and __neg__/__sub__), which
> may be either exact (e.g. integers) or inexact (e.g. floating point
> types). ?For exact types it does not make sense to use compensated
> summation (though it wouldn't give an incorrect answer, either), and
> sum() cannot decide whether a user-defined type is exact or inexact.
>
> But I guess that it would still be possible to make sum() use
> compensated summation for built-in floating point types (float/complex).
>
> Or, to go further, provide a switch to choose between the two methods,
> and make use compensated summation for float/complex by default. ?(But
> perhaps people would consider this last alternative a bit too messy.)
>
> (Just some thoughts ...)

 The benefits should be weighted considering the common case. For
example, do you find an error of 10^-14 unbearable ? How many times
someone will add 1.000.000 numbers in a typical scientific application
written in python ?

 I believe that moving this to third party could be better. What about
numpy ? Doesn't it already have something similar ?


From fiacre.patrick at gmail.com  Fri May 23 03:05:58 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:05:58 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
Message-ID: <48366cfa$0$15168$607ed4bc@cv.net>

Jimmy wrote:
> Hi to all
> 
> python now has grown to a versatile language that can
> accomplish tasks for many different purposes. However,
> AFAIK, little is known about its ability of kernel coding.
> 
> So I am wondering if python can do some kernel coding that
> used to be the private garden of C/C++. For example, can python
> intercept the input of keyboard on a system level? someone told me
> it's a kernel thing, isn't it?


http://wiki.python.org/moin/elmer



From castironpi at gmail.com  Wed May  7 20:41:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:41:17 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com> 
	<68dpjdF2rvl8oU1@mid.uni-berlin.de>
Message-ID: <c44aea57-b367-4091-9a1d-c6f2b004d167@a23g2000hsc.googlegroups.com>

On May 7, 8:36?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jetus wrote:
> > On May 4, 7:22 am, castiro... at gmail.com wrote:
> >> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> >> wrote:
>
> >> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com>
> >> > escribi?:
>
> >> > > Is there a good place to look to see where I can find some code that
> >> > > will help me to save webpage's links to the local drive, after I have
> >> > > used urllib2 to retrieve the page?
> >> > > Many times I have to view these pages when I do not have access to
> >> > > the internet.
>
> >> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> >> > --
> >> > Gabriel Genellina
>
> >> A lot of the functionality is already present.
>
> >> import urllib
> >> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> >> from htmllib import HTMLParser
> >> from formatter import NullFormatter
> >> parser= HTMLParser( NullFormatter( ) )
> >> parser.feed( open( 'main.htm' ).read( ) )
> >> import urlparse
> >> for a in parser.anchorlist:
> >> ? ? print urlparse.urljoin( 'http://python.org/', a )
>
> >> Output snipped:
>
> >> ...http://python.org/psf/http://python.org/dev/http://python.org/links/h...
> >> ...
>
> > How can I modify or add to the above code, so that the file references
> > are saved to specified local directories, AND the saved webpage makes
> > reference to the new saved files in the respective directories?
> > Thanks for your help in advance.
>
> how about you *try* to do so - and if you have actual problems, you come
> back and ask for help? Alternatively, there's always guru.com
>
> Diez- Hide quoted text -
>
> - Show quoted text -

I've tried, no avail.  How does the open-source plug to Python look/
work?  Firefox was able to spawn Python in a toolbar in a distant
land.  Does it still?  I believe under DOM, return a file named X that
contains a list of changes to make to the page, or put it at the top
of one, to be removed by Firefox.  At that point, X would pretty much
be the last lexicly-sorted file in a pre-established directory.  Files
are really easy to create and add syntax too, if you create a bunch of
them.  Sector size was bouncing though, which brings that all the way
up to file system.

for( int docID= 0; docID++ ) {
  if ( doc.links[ docID ]== pythonfileA.links[ pyID ] ) {
    doc.links[ docID ].anchor= pythonfileB.links[ pyID ];
    pyID++;
  }
}


From torriem at gmail.com  Wed May  7 17:51:37 2008
From: torriem at gmail.com (Michael Torrie)
Date: Wed, 07 May 2008 15:51:37 -0600
Subject: Why don't generators execute until first yield?
In-Reply-To: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <48222469.70803@gmail.com>

Martin Sand Christensen wrote:
> Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?

A great example of why this behavior would defeat some of the purpose of
generators can be found in this amazing PDF presentation:

http://www.dabeaz.com/generators/Generators.pdf

> Giving generators special case semantics for no good reason is a really
> bad idea, so I'm very curious if there is a good reason for it being
> this way. With the current semantics it means that errors can pop up at
> unexpected times rather than the code failing fast.

Most assuredly they do have good reason.  Consider the cases in the PDF
I just mentioned.  Building generators that work on the output of other
generators allows assembling entire pipelines of behavior.  A very
powerful feature that would be impossible if the generators had the
semantics you describe.

If you want generators to behave as you suggest they should, then a
conventional for x in blah approach is likely the better way to go.

I use a generator anytime I want to be able to iterate across something
that has a potentially expensive cost, in terms of memory or cpu, to do
all at once.


From bronger at physik.rwth-aachen.de  Tue May 13 12:04:27 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 13 May 2008 18:04:27 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <87hcd2gph0.fsf@physik.rwth-aachen.de>

Hall?chen!

Dave Parker writes:

> [...]
>
> Perhaps.  Flaming Thunder is only $19.95 per year for an
> individual (and even less per individual for site licenses), which
> is less than the cost of just one book on Python.

First of all: Although I consider myself part of the Free Software
community, I have no problems at all with such a licence model.

But ...

> [...]
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This
> weekend, Python users will still be debating how to fix
> awkwardnesses in the languages (such as FOR loops where you're
> just counting the loops and not referencing the loop variable) --
> but Flaming Thunder users will be getting work done using the
> REPEAT n TIMES constructs that I'll be implementing.

Well, this is besides the point in my opinion.  First, what you
consider a wart may be loved by someone else.  I for example would
consider a "REPEAT n TIMES" feature as Ruby offers it (and soon FT
apparently) ugly because it is superfluous.

And secondly, *every* language has their warts.  So many languages
start as clean babies because they offer little and focus on a
specific domain.  But grown up, they include the same dirty tricks
and suprising corners as the big languages.

For me being a physicist and a hobby programmer, FT still is a toy
language.  Cute but titchy.  It surely has its applications, but if
you produce pocket calculators, don't tell a computer manufacturer
that your machines are much simpler to use.  Instead, both things
simply have their purposes.

> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months
> and those awkwardnesses are already getting fixed.  The
> difference: I can't afford to ignore users.

Really, the Python developers listen *very* carefully what the users
want.  Of course, the response time in Python is months rather than
days, which has turned out to be a good thing more than once.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From hrpenf at gmail.com  Wed May 21 05:07:38 2008
From: hrpenf at gmail.com (RaymondHe)
Date: Wed, 21 May 2008 02:07:38 -0700 (PDT)
Subject: How to transfer files over serial?
Message-ID: <dc9268f1-061e-48a8-8598-420f35fc858a@u12g2000prd.googlegroups.com>

I want to transfer files over serial,but PySerial Module does not
support any protocol such as xmodem/ymodem,and I find nothing about
these protocol write in python

What should I do?Thank you


From ivan.illarionov at gmail.com  Mon May 12 23:18:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 13 May 2008 03:18:10 +0000 (UTC)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
Message-ID: <g0b19h$2ne$1@news.mtu.ru>

On Mon, 12 May 2008 19:19:05 -0700, Jimmy wrote:

> Well, i know it may be a little non-python thing, however, I can think
> of no place better to post this question :)
> 
> can anyone tell me, in python, how to obtain some information of a
> running program?
> paticularly, if i am playing some music in audacious or other media
> player, how can i get the the name and some other info of current
> playing song? It seems that audicious doesn't output on run-time

In case of Audatious running on X11 all you need is Python X library
http://python-xlib.sourceforge.net/

And something like:

from Xlib import display

dpy = display.Display()
root = dpy.screen().root

NET_WM_NAME = dpy.intern_atom('_NET_WM_NAME')
UTF8_STRING = dpy.intern_atom('UTF8_STRING')

for win in root.query_tree().children:
    try:
        window_title = win.get_full_property(NET_WM_NAME, 
UTF8_STRING).value
    except AttributeError:
        continue
    if window_title.endswith('Audacious'):
        song = window_title.split(' - ')[:-1]
        if song:
            print song

-- Ivan


From webmaster at monzell.com  Sun May 11 01:05:02 2008
From: webmaster at monzell.com (Rilindo Foster)
Date: Sun, 11 May 2008 01:05:02 -0400
Subject: Now what!?
In-Reply-To: <8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
	<8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>
Message-ID: <83DE3A94-92A2-4852-B44F-B2F91E924B2B@monzell.com>

I don't know the context of the discussion, since I just joined the  
list, but:


On May 10, 2008, at 11:05 PM, hdante wrote:

> On May 10, 8:22 pm, notbob <not... at nothome.com> wrote:
>> On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>>
>>>    So... in short, you'd need to have been reading a tutorial  
>>> specific
>>> to "shell" scripting...
>>
>> I have been.  I'm also trying to learn bash shell scripting, not to  
>> mention
>> sed/awk, php, etc.  I should have started this a long time ago, but  
>> I'm lazy
>
> Throw all of this away and learn just python. That will be much
> simpler for you.

Ummm, if you are working with Unix and Unix-like systems, you should  
know shell scripting. Work through that first and then when you find  
that you can't get things done with a shell script, go with Python (or  
failing that, Perl :) ).

  - Rilindo


From mccredie at gmail.com  Tue May 27 12:10:09 2008
From: mccredie at gmail.com (Matimus)
Date: Tue, 27 May 2008 09:10:09 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <176349fa-381e-4b02-8b41-3a7da3725b76@p25g2000pri.googlegroups.com>

On May 27, 8:21?am, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker
>
> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> wrote:
>
> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > > seems to be needed
>
> > > He doesn't seem to care much anyway now
>
> > > Or if he cares, he have many other assignments
>
> > Who are you talking about?
>
> > > So should we try to elect a new chairman?
>
> > Chairman? Elaborate please.
>
> > > I am probably not eligible. There must be many others.!
>
> > > Do you dare?consper
>
> > Hm, are you and castrionpi twin brothers or something?
>
> > > S.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > Wbr, Andrii Mishkovskyi.
>
> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
>

Guido is the BDFL: Benevolent Dictator For Life. He was not elected.
If you want new leadership in Python it won't be done via a vote, it
will be via a coup. You will need to create your own community (and
probably fork of Python) that is superior to the existing version. So
much that people decide to migrate from one to the other.

Any conversation that leads to such a communal fork would probably
begin with discussing things that should be done differently in Python
and garnering support.

Personally, what I like _most_ about python is the community. Guido
played a large part in establishing this community. If you put
together a coherent argument regarding the future of Python people
will listen, including Guido.

Matt



From ian.g.kelly at gmail.com  Thu May  8 23:48:48 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Thu, 8 May 2008 21:48:48 -0600
Subject: Free Memory
In-Reply-To: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
Message-ID: <3fc761710805082048q1da9be4fw2c75a06ec3ebdc6e@mail.gmail.com>

On Thu, May 8, 2008 at 6:30 PM, Dark Wind <darkwind.87 at gmail.com> wrote:
> Hi,
>
> How can I free all the memory in python by deleting all variables. I am
> looking for the equivalent of 'clear' from Matlab.
>
> I know del x deletes a variable x, but it doesn't free all the available
> memory.

I don't know if there's a good way to do exactly what you're asking
for.  However, if you really want to reset *everything*, you could
replace the current process with a fresh interpreter by calling
os.execlp("python").


From fabiofz at gmail.com  Wed May  7 10:16:50 2008
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Wed, 7 May 2008 11:16:50 -0300
Subject: Pydev 1.3.16 Released
Message-ID: <cfb578b20805070716v5f0af286oe7289f53e9ec3907@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.16 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Code Analysis: __path__ Not correctly found on some situations.
* Local rename (ctrl+2+r): Positions correctly ordered for tabbing.


Release Highlights in Pydev:
----------------------------------------------

* Interactive console: help() works
* Interactive console: context information showing in completions
* Interactive console: backspace will also delete the selected text
* Interactive console: ESC does not close the console when in floating
mode anymore
* Code completion: calltips context info correctly made 'bold'
* Code completion: variables starting with '_' do not come in import *
* Code completion: can be requested for external files (containing system info)
* Code completion: fixed recursion condition
* Code completion: egg file distributed with dll that has a source
module with the same name only with a __bootstrap__ method now loads
the dll instead of the source module (e.g.: numpy egg)
* Debugger: Step over/Step return can now execute with untraced frames
(much faster)
* Debugger: Problem when handling thread that had no context traced
and was directly removed.
* Launching: F9 will reuse an existing launch instead of creating a
new one every time
* Launching: The default launch with Ctrl+F11 will not ask again for
the launch associated with a file (for new launches -- old launches
should be deleted)
* Project Explorer: fixed integration problems with CDT (and others)
* Launch: console encoding passed as environment variable (no longer
written to the install location)
* More templates for "surround with" (Ctrl+1)
* Previous/next method could match 'class' and 'def' on invalid location
* Outline: Assign with multiple targets is recognized
* Bug fix for pydev package explorer when refreshed element parent was null



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and
Jython development -- making Eclipse a first class Python IDE -- It
comes with many goodies such as code completion, syntax highlighting,
syntax analysis, refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com


From matthieu.brucher at gmail.com  Sun May 18 03:53:09 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sun, 18 May 2008 09:53:09 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
	<c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>
	<20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>
Message-ID: <e76aa17f0805180053u14e5dc78n2747aa5161150e1b@mail.gmail.com>

2008/5/15 John Salerno <johnjsal at nospamgmail.com>:

> On Tue, 13 May 2008 06:25:27 -0700 (PDT)
> Dave Parker <daveparker at flamingthunder.com> wrote:
>
> > > I'm pretty generally interested, but where can print layout take you?
> >
> > Not far, especially with books disappearing.  Our library says that
> > these days, only 25% of their checkouts are books; the other 75% are
> > DVDs, CDs, etc.
>
> Sorry, but I must point out a logical flaw in this statement. Assuming your
> stats are even true, just because books are now only 25% of checkouts rather
> than, for example, 80%, doesn't necessarily imply that any less books are
> being checked out (i.e. "disappearing"). It can just as easily mean that
> *more* of the other things are being checked out while books remain the
> same.
>
> Example:
>
> Total number of items checked out:    100
> Total number of books checked out:     80
> Percentage of books checked out:       80%
>
> Total number of items checked out:    320
> Total number of books checked out:     80       # same as above
> Percentage of books checked out:       25%
> --
> http://mail.python.org/mailman/listinfo/python-list
>

In France, the book market is bigger (in terms of money) than the DVD and CD
market IIRC. That's strange, isn't it ?

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From deets at nospam.web.de  Fri May 16 11:28:52 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 17:28:52 +0200
Subject: writing python extensions in assembly
In-Reply-To: <b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
Message-ID: <695ni3F30u8tgU2@mid.uni-berlin.de>

inhahe schrieb:
> Well the problem is that I'm actually not an assembler guru, so I don't know 
> how to implement a dll in asm or use a c calling convention, although I'm 
> sure those instructions are available on the web.  I was just afraid of 
> trying to learn that AND making python-specific extensions at the same time. 
> I thought of making a c extension with embedded asm, but that just seemed 
> less than ideal.  But if somebody thinks that's the Right Way to do it, 
> that's good enough..

I think the right thing to do if you are not as fluent in assembly is do 
not do anything in it at all. What do you need it for?

Diez


From pavlovevidence at gmail.com  Tue May 13 14:47:23 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 11:47:23 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
Message-ID: <6bb0ca79-1070-4d42-90a9-a1066b152210@d1g2000hsg.googlegroups.com>

On May 13, 1:44 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>
> > Does anyone know of any (preferably largish) examples of literate
> > programs written using Python?  Alternatively, does anyone know of any
> > literate programming tools which support Python well?  (I am aware of
> > Leo and I've been to literateprogramming.com, but any additional
> > pointers would be much appreciated!)
>
> Check out Zope, bittorrent, or Editra. You should just go to
> SourceForge and do a search for projects done in Python.


Those aren't examples of literate programming AFAIK.  (Check Wikipedia
for "literate programming" if you're still confused.)

It occurs to me that one could get pretty close to literate
programming with Pure Python (if they stick to regular function calls
and not expect code weaving, which would need a preprocessor).  A
fairly simple script could  parse docstrings and Python source files
to produce a document from the source.  In fact, there are tools that
can do that sort of thing already, but I doubt they output documents
according to literate programming expectations.  Don't know of any
tools specifically for literate programming.


Carl Banks


From sophacles at gmail.com  Thu May 22 20:00:14 2008
From: sophacles at gmail.com (Erich)
Date: Thu, 22 May 2008 17:00:14 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<m2d4ne6w4a.fsf@googlemail.com>
Message-ID: <9ef43041-3bf6-45b5-8623-afaf7755d660@z66g2000hsc.googlegroups.com>

On May 22, 1:18 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
<snip lots>
> My mum's fast...<more snipping>
<snip some more>
> Arnaud

Was it a good idea to include that bit in a troll response?

If English isn't your first language, it's one of those language
idioms that's not very nice to say about someone's mother (especially
your own mother).

Erich


From castironpi at gmail.com  Wed May 14 12:20:18 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 09:20:18 -0700 (PDT)
Subject: named tuple mutability
Message-ID: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>

I'm concerned over the future of Python.  Should tuples be named?


From gagsl-py2 at yahoo.com.ar  Sun May 11 17:15:38 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 May 2008 18:15:38 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
	<op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<3de8e1f70805102115j5f0bf985w3952facf49a66d79@mail.gmail.com>
	<3de8e1f70805102117p584e5920hb4a99166488c6448@mail.gmail.com>
Message-ID: <op.ua0dccu1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 01:17:22 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> I realized that my query was not making much sense, or a bit convoluted. A
> simler form of the question:
>
> For packages which do contain .dlls & .pyd's (not pure Python) their latest
> version may be compatible with -- say Python 2.5, whereas I need the version
> compatible for Python2.2. Is this a completely manual exercise ?

You don't have to try - binaries for different Python versions *are* *not* compatible (up to the second digit: 2.4 and 2.5 are not compatible, but 2.5.1 and 2.5.2 are). So any extension using a .pyd/.dll will have to be recompiled, at least.
Even pure Python code written for 2.5 may use features not available in 2.2.

Packages built using setuptools (eggs) may contain explicit dependency information but I don't know for sure.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Sun May 11 14:28:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 19:28:17 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
Message-ID: <m263tk4rwe.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> bc90021 <python at bc90021.net> writes:
>
>> On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:
>>
>>> bc90021 <python at bc90021.net> writes:
>>> 
>>>> Hi All,
>>>>
>>>> Thanks in advance for any and all help!
>>>>
>>>> I have this code:
>>>>
>>>> g = open(fileName, 'a')
>>>>
>>>> where fileName is defined before the line it's used in.  It works fine
>>>> when I use it outside a thread class.
>>>>
>>>> When I put the same line in a thread class, it no longer works, and I
>>>> get an error:
>>>>
>>>> IOError: [Errno 2] no such file u'fileName'
>>>>
>>>>
>>> It's telling you that you haven't got a file called 'fileName'. Posting
>>> the code that triggers this error would allow people to diagnose the
>>> error accurately rather than guessing.
>>
>> f = open(otherFile).readlines()
>> for i in len(f):
>> 	for c in range(0,24,1):
>> 		if os.name == "posix":
>> 			tempfileName = "\"proctemp/" + self.matrix[c][0] 
>> + "_tmp_" + fileName + ".txt\""
>>    	if re.search(f[i], pattern):
>> 		g = open(tempfileName, 'a')
>> 		g.write(f[i])
>>
>>
>> This code works *perfectly* unless I put it in a class that inherits from 
>> threading.Thread.  In the thread class, everything works (I can see the 
>> "c" value, and I can print out each line in "f[i]", it's just that the g 
>> = open line doesn't work.
>
> It's difficult to know what's wrong with the code you posted because:
>
> * it is not self-contained: otherFile, fileName, pattern are names
>   which you do not define;
>
> * the IOError you reported earlier can't arise as a result of running
>   this code.

Correction: it can, if otherFile == u'fileName'

So I put 1000 rupees on this being the cause of the error :)

-- 
Arnaud


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:53:07 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:53:07 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <b848dcb1-6922-4cb4-ad1f-eac32e9268ec@l17g2000pri.googlegroups.com>

On May 8, 10:34 am, andrej.panj... at climatechange.qld.gov.au wrote:
>
> >>> HeightDistrib = (170, 20)
>

That should be
> >>> HeightDistrib = Gaussian(170, 20)


From george.sakkis at gmail.com  Mon May  5 23:11:54 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 5 May 2008 20:11:54 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
Message-ID: <ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>

On May 5, 6:57 pm, Matimus <mccre... at gmail.com> wrote:
> On May 5, 10:22 am, Francesco Bochicchio <bock... at virgilio.it> wrote:
>
>
>
> > On Mon, 05 May 2008 00:35:51 -0700, sandipm wrote:
> > > Hi,
> > >  In my application, I have some configurable information which is used
> > > by different processes. currently I have stored configration in a
> > > conf.py file as name=value pairs, and I am importing conf.py file to
> > > use this variable. it works well
>
> > > import conf
> > > print conf.SomeVariable
>
> > > but if I need to change some configuration parameteres,  it would need
> > > me to restart processes.
>
> > > I want to store this data in some conf file (txt) and would like to
> > > use it same way as I am using these variables as defined in py
> > > files.
>
> > > one solution I can think of is writing data as a dictionary into conf
> > > file. and then by reading data, apply eval on that data. and update
> > > local dict? but this is not a good solution....
>
> > > any pointers?
>
> > > Sandip
>
> >  The 'simple but relatively dangerous way', already suggested, is to
> >  reload() the module.
>
> > A safer way - but requiring more work - could be to build something around
> > the Configparser module in the standard library ...
>
> > Ciao
> > -----
> > FB
>
> How is it relatively dangerous? I mean, aside from any `dangers'
> associated with importing a user defined module in the first place.

Read the caveats in reload()'s description. Briefly:
- It does not reload names imported with "from  ... import ...".
- Any existing instances of classes defined in the module still refer
to the original class, not the reloaded one (assuming it is still
present).
- The module's dictionary (containing the module's global variables)
is retained and updated in place, so names that are deleted in the
module are still available.
- It is not recursive.
- And more...

George


From ricaraoz at gmail.com  Tue May 13 19:08:51 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 13 May 2008 20:08:51 -0300
Subject: python vs. grep
In-Reply-To: <87k5hy20eo.fsf@gmail.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>	<mailman.813.1210286049.12834.python-list@python.org>	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>	<mailman.1004.1210630577.12834.python-list@python.org>
	<87k5hy20eo.fsf@gmail.com>
Message-ID: <482A1F83.2030505@bigfoot.com>

Ville M. Vainio wrote:
> Ricardo Ar?oz <ricaraoz at gmail.com> writes:
> 
>> The easy/simple (too easy/simple?) way I see out of it is to read THE
>> WHOLE file into memory and don't worry. But what if the file is too
> 
> The easiest and simplest approach is often the best with
> Python. 

Keep forgetting that!

> 
> If the file is too big, you might want to look up mmap:
> 
> http://effbot.org/librarybook/mmap.htm

Thanks!


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:34:56 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:34:56 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>

On May 8, 7:38 am, globalrev <skanem... at yahoo.se> wrote:
> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
>                 return lambda x,inc=n: x+inc
>
> if i do addn(5) it returns
>
> >>> def addn(n):
>
>                 return lambda x,inc=n: x+inc
>
> >>> addn(5)
>
> <function <lambda> at 0x01D81830>
>
> ok? so what do i write to make it actually do something. and is the
> inc=n necessary i cant do x+n?

Here are some notes I have written for our local wiki on lambdas in
python.  I hope you will find them illuminating, and I would welcome
any suggestions for improving them.

I have just cut and pasted from our wiki, so the fancy formatting has
been lost.

-----

Python lambdas.

The on-line documentation for python lambdas is not very illuminating.
Here?s my take and my first simple examples.

I would describe a lambda as a parameterised function template. If you
dig, the docs call lambdas anonymous functions not bound to a name.
There is a bit of resemblance to C macros.

Here is a simple lambda that implements an exclusive or:

>>> def XOR(x,y) :
>>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) )

(Because of the resemblance to C macros, I have been cautious and
written the lambda with lots of parentheses.)

To use this in later code, we define instances of the lambda with
specific function arguments.

>>> topping = XOR( cream, icecream)
>>> sauce = XOR( tomato, BBQ )


We now have two ?functions?, topping() and sauce() which we can use
later to test flags.

>>> cream = True
>>> icecream = False
>>> print topping()
True


So in the definition of the XOR lambda, think of x and y as the
parameters of the function template, and XOR as the function name
placeholder.

By putting in specific objects for the parameters (here the boolean
variables cream and icecream for example), we produce a specific
instance of the lambda, topping() which looks like a function with no
arguments.

If we use different objects for the parameters (say tomato and BBQ)
then we get a different function, sauce.

Here is another simple lambda, (template) to set up three new
functions AddOnly, DeleteOnly, and ReplaceOnly.

#--# Lambda function to check that a flag is only on when the other
two are off. #--#
def TFF(x,y,z) :
  return lambda : ( ( x ) and not ( y ) and not ( z ) )

AddOnly = TFF( options.AddAction, options.ReplaceAction,
options.DeleteAction )
DeleteOnly = TFF( options.DeleteAction, options.AddAction,
options.ReplaceAction )
ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
options.DeleteAction )

if( not (DeleteOnly() or AddOnly() or ReplaceOnly() ) ):
  print "Error:  Exactly one of  [ --add | --replace | --delete ]
allowed. "
  parser.print_help()
  exit


More advanced lambdas.

The examples above give function instances that have no arguments,
once the parameters of the lambda are chosen.

For a function template with arguments and parameters, we add the
arguments on the 2nd line. Parameters are in the first line.

The Gaussian distribution is exp(-(x-?)?/ 2?? ) / ?(4 ??). While we
can think of this as a function of three variables, we normally view
it as a family of functions of a single variable x, parameterised by ?
and ?. Selecting fixed values for ? and ? gives us a single
distribution for x.

>>> import math
>>> def Gaussian( mu, sigma ) :
...   return lambda x : math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
math.sqrt (2 * math.pi *sigma **2 )
...
>>>

and here are some instances:

>>> Normal = Gaussian (0, 1)
>>> HeightDistrib = (170, 20)

which we later use as

>>> y = Normal( 0.5 )
0.35206532676429952
>>> x = 192
>>> HeightDistrib(x)
0.0073381331586869951

I recommend defining the instances of the lambda right after the
lambda. If you define it in code far removed from the definition of
the lambda, it looks like an assignment, so comment it.


From tjreedy at udel.edu  Thu May  1 18:43:02 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 18:43:02 -0400
Subject: Pep11
References: <mailman.424.1209664569.12834.python-list@python.org>
	<481a068c$0$9757$9b622d9e@news.freenet.de>
Message-ID: <fvdh1h$b6c$1@ger.gmane.org>

The syllable link at the bottem is not currently working.
The site itself is still alive and distributing 2.5.1
terry





From deets at nospam.web.de  Mon May 26 15:54:54 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 21:54:54 +0200
Subject: Question about wsgi.input
In-Reply-To: <wwE_j.50552$7a.48515@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
	<6a0htmF35sj8eU1@mid.uni-berlin.de>
	<wwE_j.50552$7a.48515@bignews1.bellsouth.net>
Message-ID: <6a0isiF35d89iU1@mid.uni-berlin.de>

inhahe schrieb:
> That's what I would have thought, just seems strange since it seems to imply 
> that if I use StringIO or cStringIO, then whenever i write to it i have to 
> save the position, seek to the end, write, and then seek to the position i 
> saved.  Are there any other classes that are more suitable for pipes, but 
> qualify as 'file-like objects'?

Who uses StringIO for what? if you have two processes (server and 
application), you can of course use a pipe of some sort. If you write a 
WSGI-server that is supposed to pass the wsgi.input to an application, 
just use StringIO with the completely initialized data - there is no 
writing in-between.

Diez


From larzluv at hotmail.com  Sun May 11 21:02:48 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 18:02:48 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <bfcaef01-20fa-427a-ba3f-b09f509ef608@59g2000hsb.googlegroups.com>

After putting the magic1.dll file to C:\Program Files\Python25\DLLs
(looking at the directory structure, that seemed as good a place as
any), now I can *import* the module, but...

    >>> import magic
    >>> test = magic.Magic()
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "build\bdist.win32\egg\magic.py", line 32, in __init__
      File "build\bdist.win32\egg\magic.py", line 72, in _check_error
    magic.MagicException: could not find any magic files!

I've placed

      474,146 magic
    1,037,440 magic.mgc
       32,203 magic.mime
       45,696 magic.mime.mgc
       77,312 magic1.dll

into

    C:\windows\system32
        in Windows/System PATH
AND (simultaneously)
    C:\Program Files\python25\DLLs
        in sys.path/PYTHONPATH

(I've also tried putting copies into different dirs in both PYTHONPATH
and system PATH, to no avail.)

Obviously, magic1.dll/magic.py (et al) can't FIND the needed file(s),
but I'm not sure how to go about discerning WHERE it/they are looking
- any thought(s)/suggestion(s), anyone??


Thanks in advance!
-Larry


P.S.: Thanks, again, Michael!  ;)  - L


From python at bdurham.com  Mon May 12 20:11:06 2008
From: python at bdurham.com (python at bdurham.com)
Date: Mon, 12 May 2008 20:11:06 -0400
Subject: using PIL for good screenshots
In-Reply-To: <g0adou$1us$1@foggy.unx.sas.com>
References: <g0adou$1us$1@foggy.unx.sas.com>
Message-ID: <1210637466.13155.1252798043@webmail.messagingengine.com>

Tim,

Sounds like an interesting project.

Have you considered using SnagIt to produce your screenshots?
www.TechSmith.com/SnagIt

Malcolm


From wuwei23 at gmail.com  Tue May  6 04:46:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 6 May 2008 01:46:15 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <e0ebb932-e1e6-4006-9a1e-1373c4d0a7ee@z16g2000prn.googlegroups.com>

On May 6, 6:01 pm, Maciej Blizi?ski <maciej.blizin... at gmail.com>
wrote:
> Is there any other package that allows sending MIDI events in real
> time? Did anyone recently got any of the above packages to work?

There's MidiKinesis (http://www.sci.ccny.cuny.edu/~brinkman/software/
midikinesis/) which allows for midi events to be bound to X-Windows
events.  It looks like it achieves this using ctypes to wrap around
the ALSA libs, which may be another approach to consider. The
MidiKineses codebase would be a good place to start if you wanted to
give that a try.

I'm sorry I can't be of much more help but please keep us posted on
what you find!

- alex23




From sn at sncs.se  Tue May 27 11:26:01 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:26:01 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>

I dont want to be a new Guido. Somebody else please.

S.


On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker
>
> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> wrote:
>
> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > > seems to be needed
>
> > > He doesn't seem to care much anyway now
>
> > > Or if he cares, he have many other assignments
>
> > Who are you talking about?
>
> > > So should we try to elect a new chairman?
>
> > Chairman? Elaborate please.
>
> > > I am probably not eligible. There must be many others.!
>
> > > Do you dare?consper
>
> > Hm, are you and castrionpi twin brothers or something?
>
> > > S.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > --
> > Wbr, Andrii Mishkovskyi.
>
> > He's got a heart of a little child, and he keeps it in a jar on his desk.



From lists at cheimes.de  Fri May  2 15:41:36 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:41:36 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481B6E70.7000503@cheimes.de>

Brendan Miller schrieb:
> Hi,
> 
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.

import os
null = open(os.devnull, "wb")

:)

Christian



From Graham.Dumpleton at gmail.com  Mon May 26 00:00:31 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sun, 25 May 2008 21:00:31 -0700 (PDT)
Subject: Beginner question
References: <f4fb9b71-847b-4e71-892b-952b2e0f8e6e@w5g2000prd.googlegroups.com>
Message-ID: <3c816e91-5acb-4dd4-bfc4-164d4a2f1100@q27g2000prf.googlegroups.com>

On May 26, 4:13?am, howa <howac... at gmail.com> wrote:
> Hi,
>
> Just want to try mod_python but it is more complicated then I
> expected...
>
> I just followed the tutorial on:http://www.modpython.org/live/mod_python-2.7.8/doc-html/inst-testing....
>
> E.g.
>
> URL =http://www.example.com/mptest.py
>
> It return
>
> ImportError: No module named mptest
>
> 1. If I removed addHandler mod_python .py and PythonHandler mptest, I
> can see the SOURCE CODE
>
> 2. The PythonHandler mod_python.testhandler seems return correct
> result, showing I am using python 2.4.3
>
> any idea?

Why are you using the documentation from version 2.7.8 of mod_python
when you are using a much newer version?

Also read:

  http://www.dscpl.com.au/wiki/ModPython/Articles/GettingModPythonWorking

Graham





From gandalf at shopzeus.com  Thu May 15 09:51:29 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 15:51:29 +0200
Subject: create window on panel
In-Reply-To: <70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>	<mailman.1153.1210845280.12834.python-list@python.org>	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>	<mailman.1158.1210851928.12834.python-list@python.org>
	<70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>
Message-ID: <482C3FE1.3060700@shopzeus.com>


>> URL:http://www.daa.com.au/~james/software/pygtk/
>> /
>> /It should be easy to read the docs, view the demo programs and create
>> your own program.
>>
>> L
>>     
>
> thanks~ it seems attractive, however, I did not find much useful
> information :(
>   
http://www.pygtk.org/ -- full docs
http://packages.ubuntu.com/dapper/doc/python-gtk2-tutorial -- This seems 
to be a tutorial for python-gnome2.

Let me know if it doesn't help.

L




From bruno.desthuilliers at gmail.com  Thu May 22 15:39:17 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 22 May 2008 12:39:17 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
Message-ID: <77fa9cbd-7253-4b70-9334-b1ceac1cb15a@l64g2000hse.googlegroups.com>

On 22 mai, 18:56, Mensanator <mensana... at aol.com> wrote:
> On May 22, 10:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
>
>
>
> > Dave Parker <davepar... at flamingthunder.com> wrote:
> > >  But after getting input from children and teachers, etc, it started
> > >  feeling right.
>
> > >  For example, consider the two statements:
>
> > >       x = 8
> > >       x = 10
>
> > >  The reaction from most math teachers (and kids) was "one of those is
> > >  wrong because x can't equal 2 different things at the same time".
>
> > This is a common feature in functional languages...
>
> > Eg
>
> > Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> > [async-threads:0] [kernel-poll:false]
>
> > Eshell V5.6.2  (abort with ^G)
> > 1> X = 8.
> > 8
> > 2> X = 10.
> > ** exception error: no match of right hand side value 10
> > 3>
>
> > That error message is the erlang interpreter saying "Hey I know X is
> > 8, and you've said it is 10 - that can't be right", which is pretty
> > much what math teachers say too...
>
> Are you saying that erlang treats 1> as an assignment, yet
> treats 2> as a comparison?

Nope. Both are treated as pattern matching. The first one binds X
because it's by that time a free variable, the second fails because it
doesn't match.

> That's inconsistent.

That's consistent when you understand how Erlang works.

> No wonder nobody uses erlang.

Strange enough, it seems that more and more developpers and company
start to look at Erlang as a possible solution to massive scaling
problems.

> Why isn't erlang smart, like Python, and avoid such confusion?

Erlang *is* smart. It's just totally different from Python. And
there's no confusion here (except on your side...).



From arnodel at googlemail.com  Mon May 19 04:34:49 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 19 May 2008 01:34:49 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com><b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com><Xns9A985D454FA54duncanbooth@127.0.0.1><bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com><5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com>
	<m2ve1b7msb.fsf@googlemail.com>
	<mailman.1328.1211170968.12834.python-list@python.org>
Message-ID: <6062786d-6f83-4850-bf55-4db4ec27bdea@b1g2000hsg.googlegroups.com>

On May 19, 5:22 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Arnaud Delobelle" <arno... at googlemail.com> wrote in message
[...]
> | Note that the same thing can be said about generator expressions,
> | which are nothing more than anonymous, non-reusable, generator
> | functions.
>
> Right.  So if someone posted on genexp confusion, I would suggest
> 'write a full generator function'.

I was just arguing against arguing for the removal of lambda on the
basis that it doesn't add any functionality to the language!

> | Instead these were _added_ to the language!
>
> As a convenience.
> Actually, if one uses more that one for-clause in a generator expression,
> there is a potential gotcha in relation to name capture.  So if that bites,
> the genexp is not so much a convenience, and one might better write
> the full function.
>
> tjr

Yes, IMHO this is a bug, and I wish I had the time to dive into the
code to see if I can fix it.

--
Arnaud


From darcy at druid.net  Wed May 21 13:25:10 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 21 May 2008 13:25:10 -0400
Subject: Unsubscribe request
In-Reply-To: <20080521131911.9d3b2056.darcy@PyGreSQL.org>
References: <338512.44068.qm@web39704.mail.mud.yahoo.com>
	<20080521131911.9d3b2056.darcy@PyGreSQL.org>
Message-ID: <20080521132510.af959b7b.darcy@druid.net>

On Wed, 21 May 2008 13:19:11 -0400
"D'Arcy J.M. Cain" <darcy at PyGreSQL.org> wrote:
> On Wed, 21 May 2008 09:21:05 -0700 (PDT)
> ahmed khattab <ahmed_kh1987 at yahoo.com> wrote:
> > unsubscribe me form python list plz
> 
> Please use the admin interface that you used when you subscribed:
> 
> http://mail.python.org/mailman/listinfo/python-list

Oops.  I thought I was replying to a different list that I admin.
Sorry for the noise.

However, the advice was still correct.  Don't send unsubscribe requests
to the list.  This is true of pretty much every list, not just this one.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From dullrich at sprynet.com  Sun May 25 07:54:51 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 25 May 2008 06:54:51 -0500
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
Message-ID: <loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>

On Sun, 25 May 2008 03:32:30 -0700 (PDT), ulrich at dorda.net wrote:

>Thanks for the reply,
>
>Of course the suggested solution is working and good, but a bit
>complicated. The module/function where i need to access the variable
>value from the interactive shell is burried quite deep and I would
>nedd to hand the locals() quite often from one module to another.
>Furthermore it makes the call function slightly more complicated, as
>the locals()-argunment has to be given every time.
>
>I was hoping for something a bit different: If I wanted to access a
>value b from another module "utest2.py", I would simply need to type
>in utest.py: import utest2; print 2*utest2.b
>Isn't there a name for the interactive namespace (like here the
>utest2), which I can use to access the variable without handing the
>whole dictionary?

"""utest.py"""

import __main__

def doit():
  print 2*__main__.a

>Cheers,
>
>Ulrich
>
>

David C. Ullrich


From stef.mientki at gmail.com  Mon May  5 18:25:33 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Tue, 06 May 2008 00:25:33 +0200
Subject: Browser + local Python-based web server vs. wxPython
In-Reply-To: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
References: <mailman.588.1209997391.12834.python-list@python.org>
	<bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
Message-ID: <481F895D.9050905@gmail.com>

Mike Driscoll wrote:
> On May 5, 9:22 am, pyt... at bdurham.com wrote:
>   
>> I'm looking at rewriting some legacy VB applications and am pondering
>> which of the following techniques to use:
>>
>> 1. Browser based GUI with local web server (Browser +
>> wsgiref.simple_server) (I'm assuming that simple_server is class I want
>> to build from for a local web server)
>>
>> -OR-
>>
>> 2. wxPython based GUI
>>
>> My thought is that a browser/local web server setup may be more portable
>> to mobile environments than wxPython and may offer a way to scale a
>> single user offline application to a multi-user online application using
>> a remote vs. local web server. Some groups of users may feel more
>> comfortable with a browser based interface as well.
>>
>> I'm looking for feedback from anyone that has pondered the same question
>> as well as any pros/cons or tips from anyone that has chosen the
>> browser/lcoal web server route.
>>
>> Thanks,
>>
>> Malcolm
>>     
>
> wxPython is great for desktop applications on Linux, Windows and Mac.
> However, there isn't much support for it on mobile platforms at the
> moment. If you're thinking your application will be mostly for mobile
> environments,
I've been looking for several months now for a way to program mobile 
devices,
and indeed as Mike said, wxPython has not much support so I didn't dare 
to try it.
A week ago I found PocketPyGui,
which is well supported, rock stable and qua functionality quit similar 
to wxPython
and in some aspects even much easier than wxPython.
The only disadavantage is that it's only suited for windows mobile.
To give an idea, how well it works:
in a week of spare time, I build an application with about 20 screens,
build an emulator for it in wxPython ( not completely finished),
and I now consider to build a wxPython wrapper (so I only have to know 1 
kind of syntax)

cheers,
Stef



From mensanator at aol.com  Fri May 16 13:27:44 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 16 May 2008 10:27:44 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <6ed4b0ff-5411-4384-b97d-e39667beb955@c65g2000hsa.googlegroups.com>

On May 16, 11:24?am, "inhahe" <inh... at gmail.com> wrote:
> "D'Arcy J.M. Cain" <da... at druid.net> wrote in messagenews:mailman.1232.1210952591.12834.python-list at python.org...
>
>
>
> > 2. Once the code is functioning, benchmark it and find the
> > bottlenecks. ?Replace the problem methods with a C extension. ?Refactor
> > (and check your unit tests again) if needed to break out the problem
> > areas into as small a piece as possible.
>
> There's probably only 2 or 3 basic algorithms that will need to have all
> that speed.
>
>
>
> > 3. ?If it is still slow, embed some assembler where it is slowing down.
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.
> Although it's true I'd only have to embed it for one system to see (more or
> less).
>
>
>
> >> For portability, I'd simply write different asm routines for different
> >> systems. ?How wide a variety of systems I'd support I don't know. ?As a
> >> bare
> >> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms
> >> of
> >> SIMD.
>
> > Even on the same processor you may have different assemblers depending
> > on the OS.
>
> yeah I don't know much about that, ?I was figuring perhaps I could limit the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows. ? also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.

The Society for Inherited Metabolic Disorders?

Why wouldn't the compilers support it? It's part of the x86
architexture,
isn't it?


From saluk64007 at gmail.com  Wed May 28 01:07:10 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Tue, 27 May 2008 22:07:10 -0700
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
Message-ID: <c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>

I don't know if this will go through (my posts seem to have become blocked
lately), but I'll give it a shot anyhow.

You seem to be under a misconception that a python list is similar to a list
in say, Java or other languages that have a rigid idea of variables and
types.  In python, a list is a list of objects - any type of object can be
stored in a list.  Just as you don't declare types for variables, you also
don't declare types for lists.  Here is your modified code:

class Event():
   def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
clrTime=""):
     self.cameraEventType = cameraEventType
     self.zone = zone
     self.setDay = setDay
     self.setTime = setTime
     self.clrTime = clrTime

class EventTimeFilter:
   def __init__(self):
           self.event = []  #Create an empty list, bind to the name "event"
under the "self" namespace
           self.event.append(Event())   #Create an event object and append
to the end of the list


Python won't stop you from putting other objects into self.event besides
Event objects, but in practice this isn't often an issue.  The real benefit,
is if you subclass event or make some other type of object that is similar
to events, with maybe some of the same fields, you can still store them in
the list and it will play along with the rest of your code.
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From pydev at rscorp.ab.ca  Thu May  1 11:00:02 2008
From: pydev at rscorp.ab.ca (Scott SA)
Date: Thu,  1 May 2008 09:00:02 -0600
Subject: Photo gallery software
Message-ID: <r02010500-1049-47677F73178F11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Jumping Arne (arnlen at mac.com) wrote:

>I've searching for some software that would allow me to present my photos on 
>the web (I'm not interested a software that generates static pages that I 
>upload) and there are quite a few, see for example 
><http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
>haven't managed to find one that I like - Gallery 2 is close.
>
>So I've started to see if there is one that is based python (PHP isn't really 
>"my language") but when I search on Google almost the only thing I find are 
>photo galleries of snakes (to be honest I didn't know that people were *that* 
>interested in pythons).
>
>Do any anyone know if there exists photo gallery software written in Python?
>
>I've found
><http://www.amk.ca/python/code/gallery>
><http://www.developer.com/lang/other/article.php/3734416>

I've been working with Photologue for a while with some nice results.
    <http://code.google.com/p/django-photologue/>

It is a Django project 
    <http://www.djangoproject.com/>,

It includes support for tagging:
    <http://code.google.com/p/django-tagging/> 

It easily allows configuration of different image sizes and integrates with generic templates providing gallery and detail view support. 

HTH

Scott


From irmen.NOSPAM at xs4all.nl  Mon May 19 14:25:11 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 20:25:11 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <mailman.1335.1211187990.12834.python-list@python.org>
References: <mailman.1216.1210933005.12834.python-list@python.org>	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>
	<mailman.1335.1211187990.12834.python-list@python.org>
Message-ID: <4831c608$0$14361$e4fe514c@news.xs4all.nl>


Laszlo Nagy wrote:
> 
>> It is possible to change the serialization used by Pyro
>>
>>   http://pyro.sourceforge.net/manual/9-security.html#pickle
>>
>> to the the 'gnosis' XML Pickler.
>>   
> As I said earlier, I would not use XML. Just an example - I need to be 
> able to transfer image files, word and excel documents. How silly it 
> would be to base64encode a binary file, then put it into an XML.
> 
>  L
> 

Fair enough.

In that case, here's 5 suggestions:

- use simple file copying from a mounted network drive
- use http (web server)
- use ftp
- use scp
- use rsync

Why wouldn't one of these work for you? Did I miss something in your original 
requirements? All of the above high level protocols are very efficient in concurrently 
transferring files from a server to multiple clients.

--irmen


From pavlovevidence at gmail.com  Tue May  6 16:02:12 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 6 May 2008 13:02:12 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <316b2772-576e-49ba-a368-e78c8930a07e@b1g2000hsg.googlegroups.com>

On May 6, 1:22 pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> Excuse the long post.
>
> Ben Finney <bignose+hates-s... at benfinney.id.au> writes:
> >> I guess it's safe to assume that you are not opposed to using code
> >> based on more liberal license, right? :-)
>
> > I'm less inclined to base work on, or contribute to, a work under a
> > non-copyleft license, because I have less assurance that the code will
> > remain free for all recipients.
>
> In practice, the probability of hijacking of source code by an evil
> corporation is very low for most projects. And even when it did
> happen, the evil corporation would likely submit patches.

The Wine project changed from MIT (I think) to LGPL because evil
corporations were hijacking its source code and not submitting
patches.  It happens.


Carl Banks


From iqbaltalaat at gmail.com  Fri May 16 14:53:33 2008
From: iqbaltalaat at gmail.com (I-T)
Date: Fri, 16 May 2008 11:53:33 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
Message-ID: <28ab4221-d494-4ae1-ab6f-d2f596e23d27@j22g2000hsf.googlegroups.com>

Open the file inside your script in append mode.

open('filename', 'wa')


On May 16, 11:41?pm, globalrev <skanem... at yahoo.se> wrote:
> i ahve a program that takes certain textsnippets out of one file and
> inserts them into another.
>
> problem is it jsut overwrites the first riow every time.
>
> i want to insert every new piece of text into the next row.
> so:
> 1. how do i write to a new line every time i write to the file?
>
> 2. if i dont want to write to a new line but just want to insert it
> after the last token in the file, how do i do then?



From castironpi at gmail.com  Wed May 14 13:01:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 10:01:40 -0700 (PDT)
Subject: Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
Message-ID: <f0312987-5aba-4c1d-8fcc-354e59cf5b5c@i76g2000hsf.googlegroups.com>

On May 14, 11:58?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Duncan Booth" <duncan.bo... at invalid.invalid> wrote in message
>
> news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
> | I also recommend Gmane which provides a free news server for most mailing
> | lists: mailing lists are a lot more manageable when gatewayed into a news
> | server. If you just want to access comp.lang.python I think you'll find
> the
> | mailing list to which it is connected is available for free on Gmane.
>
> gmane.comp.python.general
>
> which is where I am answering this from. ?Works great.

Love them opticals.


From swapsun at gmail.com  Wed May  7 09:01:55 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 06:01:55 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
	<68dm40F2rekquU1@mid.uni-berlin.de>
Message-ID: <b940f127-2225-4043-86f7-a3b6cd06cb6e@u36g2000prf.googlegroups.com>

On May 7, 8:36?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> swap... at gmail.com wrote:
> > Any idea why the following program does not work? I was learning IO on
> > Python and the following generates a TypeError: range() integer end
> > argument expected, got str.
> > I am a beginner.
>
> Because raw_input does return you as string which you need explicitly
> convert to a number, e.g. doing
>
> i = int(input)
>
> Diez

Thank you, Diez!


From exarkun at divmod.com  Fri May  2 15:53:59 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 2 May 2008 15:53:59 -0400
Subject: Non-blocking connect
In-Reply-To: <roy-1A07DD.14384602052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <20080502195359.6859.299919246.divmod.quotient.58224@ohm>

On Fri, 02 May 2008 14:38:47 -0400, Roy Smith <roy at panix.com> wrote:
>In article
><1029ba0a-74e0-41d3-8397-7e326f4611bf at a9g2000prl.googlegroups.com>,
> mp <mailpitches at email.com> wrote:
>
>> Thanks Roy. I was just trying to understand someone else's code, but
>> in the end it turns out that this was just a bug.
>>
>> What weirded me out was how injecting a print statement preventing the
>> error from occurring, but now I get it. Without blocking, the
>> connection handshake occurs in parallel after the connect_exc method
>> is called. In my example, my processor reaches the send call before
>> the connection manages to complete in the background. However, if you
>> stick in a print statement after the connect_exc call and before the
>> send call, it delays processing just long enough for the connection to
>> complete, thus no exception is thrown by the send call.
>
>I don't really understand that last part.  There shouldn't be any
>background processing going on, unless there's a lot more code than you
>showed.
>
>The three-way handshake *can't* happen in the background, because
>connect_ex() has no way to know what value to return until the handshake is
>completed.  Let's say I send a SYN, and 15 seconds later, you send a RST
>(indicating that the connection has been refused).  The connect_ex() call
>has to have waited the 15 seconds for this to happen so it knows to return
>an appropriate error code.
>
>I do not understand why sticking a print statement in there should make any
>difference.

The background processing is going on in the kernel, where the TCP/IP
implementation is.  After userspace has indicated the desire to establish
a connection, the kernel doesn't need any further input in order to set
up that connection.  So non-blocking connect_ex starts the process and the
process will complete on its own (successfully or with an error) without
any further socket calls from the userspace application.

The right way to know when the connect attempt has actually completed
(successfully or with an error) is to use a mechanism like select() to
check for writeability.  Once the socket is writeable, if it has a 0
SO_ERROR, the connection was successful, otherwise it failed.

Jean-Paul


From sjmachin at lexicon.net  Sat May 10 17:05:31 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 14:05:31 -0700 (PDT)
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <0541dfbd-e11f-45c1-8a36-33b205eb15dd@w34g2000prm.googlegroups.com>

On May 11, 6:59 am, wxPytho... at gmail.com wrote:
> If you are in the interactive prompt of the Python interpreter and you
> do this
>
> print """Testing\"""   or   print '''Testing\'''
>
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
>
> [1]+  Stopped                 python
>
> If you do
>
> print "Testing\"   or   print 'Testing\'
>
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?

No. This might clue you in:

>>> print """Testing\""""
Testing"
>>>

Cheers,
John


From vivainio at gmail.com  Wed May  7 13:48:27 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 07 May 2008 17:48:27 GMT
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
Message-ID: <3aoudmza.fsf@gmail.com>

Paul Boddie <paul at boddie.org.uk> writes:


> original licence as well. Now, I did leave a fair amount of
> information about the heritage of the code, so that anyone who is
> scared of the LGPL could just go and get the original work, but that

I doubt anyone is really afraid of LGPL. The only problem with LGPL is
that of static vs. dynamic linking, and that is only a problem in
platforms without dynamic linker (rarity these days).


> You can almost never just "grab the code from somewhere without having
> to think about [the] license" since even permissive licences typically
> have a list of conditions that must be observed. Certainly, they

Yeah, but you don't have to "worry" about license - just have the
license text in source code, or a text file in binary distribution.


From castironpi at gmail.com  Tue May 20 09:40:26 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:40:26 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<ed2fbf6e-346e-48dd-b205-950e5e039ab2@s50g2000hsb.googlegroups.com>
Message-ID: <ccfd1d96-3a18-49e1-ab80-63d8efdc34fb@k37g2000hsf.googlegroups.com>

On May 20, 7:56?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
>
>
>
>
>
> > Hello,
>
> > I'm getting into Python now after years of Perl, and as part of my
> > research I must understand how to do some common tasks I need.
>
> > I have a bunch of Windows PCs at work to which I want to distribute an
> > application I've developed on my PC. All these PCs have Python 2.5
> > installed.
>
> > If my application contains only code I've developed, I simply zip its
> > directory with .py files and send it to everyone, who can then use it
> > by running the entry-point .py file. However, what if I've installed
> > some 3rd party modules on my PC, and my application uses them (for
> > example pyparsing, PiYAML and some others) ? I don't want to manually
> > install all these packages (there may be dozens of them) on all those
> > PCs (there may be dozens of those too). What is the best method I can
> > use ? Naturally, I want all the non-standard packages my app uses to
> > be detected automatically and collected into some kind of convenient
> > distributable that is easy to pass around and run.
>
> > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > executables, and I don't want to distribute those all the time. I much
> > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > Thanks in advance,
> > Eli
>
> One way I forgot to mention is to put Python on the network (i.e. the
> intranet). We do that here at work and I can develop my applications
> on my machine and then put them on there for anyone to use. That way
> they never have to install Python, let alone the bother of installing
> dependencies.
>
> Mike- Hide quoted text -
>
> - Show quoted text -

Impossible and Useless here:

I assert there's no way to generate the list.

a= raw_input( )
if a== 'something unknown':
  b= 'imp'
  b+= 'ort '
  b+= 'os'
  exec( b )


From danb_83 at yahoo.com  Thu May 22 01:00:30 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Wed, 21 May 2008 22:00:30 -0700 (PDT)
Subject: related to python
References: <mailman.1461.1211424054.12834.python-list@python.org>
Message-ID: <a2688cf1-a70d-4ca2-840e-568be008caf8@8g2000hse.googlegroups.com>

On May 21, 9:34?pm, "salil_reeves" <salil_ree... at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');
> 2. stripping away any leading and trailing blank spaces; and
> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.
> how it is done ??
> can anyone help me with it

Yes, but I'm only as willing to put as much effort into my answer as
you do into your thread titles.

help(str)


From duncan.booth at invalid.invalid  Wed May  7 08:31:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 May 2008 12:31:19 GMT
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
Message-ID: <Xns9A97897C78229duncanbooth@127.0.0.1>

Marco Mariani <marco at sferacarta.com> wrote:

> Duncan Booth wrote:
> 
>> It does this:
>> 
>>>>> @greedy
>> def getCommandsFromUser():
>>      while True:
>>           yield raw_input('Command?')
>> 
>>           
>>>>> for cmd in getCommandsFromUser():
>>      print "that was command", cmd
>> 
>>      
>> Command?hello
>> Command?goodbye
>> that was command hello
>> Command?wtf
>> that was command goodbye
>> Command?
> 
> 
> Not here..
> 
> 
> In [7]: def getCommandsFromUser():
>          while True:
>                  yield raw_input('Command?')
>     ...:
>     ...:
> 
> In [10]: for cmd in getCommandsFromUser(): print "that was command", 
cmd
>     ....:
> Command?hi
> that was command hi
> Command?there
> that was command there
> Command?wuwuwuw
> that was command wuwuwuw
> Command?
> 

Perhaps if you'd copied all of my code (including the decorator that was 
the whole point of it)...



From ricaraoz at gmail.com  Thu May  8 13:11:00 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 08 May 2008 14:11:00 -0300
Subject: python vs. grep
In-Reply-To: <b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
Message-ID: <48233424.1010202@bigfoot.com>

Anton Slesarev wrote:
> I try to save my time not cpu cycles)
> 
> I've got file which I really need to parse:
> -rw-rw-r--  1 xxx  xxx  3381564736 May  7 09:29 bigfile
> 
> That's my results:
> 
> $ time grep "python" bigfile | wc -l
>     2470
> 
> real    0m4.744s
> user    0m2.441s
> sys     0m2.307s
> 
> And python scripts:
> 
> import sys
> 
> if len(sys.argv) != 3:
>    print 'grep.py <pattern> <file>'
>    sys.exit(1)
> 
> f = open(sys.argv[2],'r')
> 
> print ''.join((line for line in f if sys.argv[1] in line)),
> 
> $ time python grep.py "python" bigfile | wc -l
>     2470
> 
> real    0m37.225s
> user    0m34.215s
> sys     0m3.009s
> 
> Second script:
> 
> import sys
> 
> if len(sys.argv) != 3:
>    print 'grepwc.py <pattern> <file>'
>    sys.exit(1)
> 
> f = open(sys.argv[2],'r',100000000)
> 
> print sum((1 for line in f if sys.argv[1] in line)),
> 
> 
> time python grepwc.py "python" bigfile
> 2470
> 
> real    0m39.357s
> user    0m34.410s
> sys     0m4.491s
> 
> 40 sec and 5. This is really sad...
> 
> That was on freeBSD.
> 
> 
> 
> On windows cygwin.
> 
> Size of bigfile is ~50 mb
> 
> $ time grep "python" bigfile | wc -l
> 51
> 
> real    0m0.196s
> user    0m0.169s
> sys     0m0.046s
> 
> $ time python grepwc.py "python" bigfile
> 51
> 
> real    0m25.485s
> user    0m2.733s
> sys     0m0.375s
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


All these examples assume your regular expression will not span multiple 
lines, but this can easily be the case. How would you process the file 
with regular expressions that span multiple lines?







From gagsl-py2 at yahoo.com.ar  Tue May 13 06:42:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:42:03 -0300
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <op.ua29cdxkx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:25:06 -0300, <wxPythoner at gmail.com> escribi?:

> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?

Uh... where do you get your (mis)information about 3.0?
See http://docs.python.org/dev/3.0/whatsnew/3.0.html

-- 
Gabriel Genellina



From ulrich at dorda.net  Sun May 25 05:47:55 2008
From: ulrich at dorda.net (Ulrich Dorda)
Date: Sun, 25 May 2008 11:47:55 +0200
Subject: access interactive namespace from module (shared namespace?)
Message-ID: <483935CB.6050901@dorda.net>

I've got a probably embarrassing trivial problem with namespaces, but couldn't solve it 
myself nor find an answer in the net. Hopefully one of you guys can help me.

What I want to do:
Use the interactive shell and e.g define the variable a there.
Then load a module and access a from within.

e.g file "utest.py"

def doit():
	print 2*a

in the shell:

import utest
a=3
utest.doit()  <- I want this to print 2*a, but of course obtain: <type 
exceptions.NameError'>: global name 'a' is not defined

Any change I do to a in the shell should be seen from the doit() function, any variable 
assignment I do in the doit() function should be seen in the shell. I guess it's somehow a 
namespace sharing.

Actually the function doit() will contain an eval() function that should evaluate a (via a 
gui) dynamically inserted expression.

Any one got a clue? (a clue what I try to say and how to help?!)

Thanks a lot in advance!!

Ulrich




From jstucklex at attglobal.net  Sun May 25 21:41:09 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 21:41:09 -0400
Subject: php vs python
In-Reply-To: <g1d3lf$1rpd$3@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
	<g1d3lf$1rpd$3@news.mtu.ru>
Message-ID: <bZednZp-dZnbiKfVnZ2dnUVZ_rudnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Sun, 25 May 2008 20:53:28 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> Jerry Stuckle wrote:
>>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>>>
>>> Ivan
>> Not for a good programmer it isn't.  I've known a few good programmers
>> in my 40+ years of programming.  I've known a lot more poor programmers
>> who think they're good.
> 
> I can't argue with your experience. I don't think that I'm good 
> programmer. I want to be better. And I hope that when I'll have 48+ years 
> experience I won't have to use it as argumentum ad hominem.

No ad hominems on my part.  I said nothing about you or your abilities. 
  I spoke only of programmers I have known, both good and poor.

The the good programmers are able to adapt to the language and make the 
most of whatever language they're using.  The result is good code. 
OTOH, poor programmers I have known have found all kinds of excuses - 
from the language itself to lack of requirements, to anything else they 
can blame, except the real root of the problem.

If you take exception to that, then I'm sorry for you.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From dullrich at sprynet.com  Mon May 19 07:29:18 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 19 May 2008 06:29:18 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
Message-ID: <7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>

On Sun, 18 May 2008 18:18:34 +0200, pataphor <pataphor at gmail.com>
wrote:

>In article <dtb03495i4isn8oi89i8fpe7p8dif7cct6 at 4ax.com>, 
>dullrich at sprynet.com says...
>
>> Is there some reason that would be better? It would make a lot
>> of the code more complicated. Ok, it would require only one
>> bit of added code, I suppose, but I don't see the plus side.
>
>The plus side is you give up an untenable position :-) 

Maybe you could be more specific? Various "positions" I've
taken in all this may well be untenable, but I can't think
of any that have anything to do with whether the data should
be a single list instead of a list of lists.

(The only way I can parse this to make it relevant is to
assume that the position you're referring to is that a
list of lists is better than a single list. If so: First, I
haven't said that it was. Second, saying "B is untenable"
is not much of an answer when someone asks why you
say A is better than B.)

>And to address an 
>item in a matrix costs two lookups, row and column, while an array needs 
>only one. 

The phrase "premature optimization" springs to mind.

This is _Python_ we're talking about. Supposing you're right that
doing two lookups _in Python_ is faster than doing one lookup
plus the calculuation col + row*width _in Python_, it can't
make enough difference to matter. In the sort of application I
have in mind things already happen "instantaneously".

The point is not to improve on NumPy. Trying to improve on
NumPy in pure Python code would be silly - if I wanted
optimized large matrices I'd _use_ NumPy. The point is just
to give a simple "intuitive" way to manipulate rows and
columns in small matrices. 

So I'm not looking ahead to the future, things are not
scalable? The thing is not _supposed_ to scale up to
large matricies. If a person were dealing with large
matricies then almost all of it would need to be
rewritten (and if a person were dealing with really
large matrices then trying to do the thing in pure
Python would be silly in the first place, and insisting
on being able to write things like "m.row[0] =
m.row[1] + m.row[2]" could very well be a totally
wrong approach to begin with - I'd figure out the
operations I expected to need to do and write functions
to do them.)

Really. In one of the intended applications the matrix
entries are going to be home-made Rationals. Just
adding two of those guys takes a long time. It's
still more than fast enough for the intended application,
but [oh, never mind.

Sorry about the argumentative tone - I _would_ like
to know which "untenable position" you're referring to...

>P.

David C. Ullrich


From Lie.1296 at gmail.com  Fri May 30 05:39:20 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 30 May 2008 02:39:20 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <5c5744cb-d801-48aa-b34d-c03c036d4885@w8g2000prd.googlegroups.com>

On May 24, 5:59?am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> ? ? ? ? printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> ? ? ? ? print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?
>
> Thanks a lot,
> Johannes

Python often tries to avoid things it considers "bad design" in a
language, "assignment and comparison" is, for example, a bad design
because it is easily mistaken with "equality comparison", among other
things. This avoidance of bad design sometimes go as far as making
"the way" to do something in python completely different than doing
the same thing in other languages, thus it is always a good idea to
state what you intent in doing, rather than stating what you think you
need to do. An example is python's notion for 'for' loop, which can
only loop a list, most people coming from other languages would use
range/xrange here and there, a pythonic code would only rarely use a
range/xrange (usually in situations where the number of repetition is
constant).

Try reasking by stating what you wanted to do, rather than the
abstract question that states what you think you need to do you've
just asked. What functions you wanted to use and for what?


From castironpi at gmail.com  Wed May 14 08:50:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 05:50:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<mailman.1057.1210697850.12834.python-list@python.org>
	<0bda514d-7e61-45ff-826b-9e64999b18c3@z24g2000prf.googlegroups.com>
	<mailman.1115.1210762408.12834.python-list@python.org>
Message-ID: <31f96940-b658-48ed-9227-29c2d4826acf@d1g2000hsg.googlegroups.com>

On May 14, 5:53?am, "J. Clifford Dyer" <j... at sdf.lonestar.org> wrote:
> On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
> > > You sound like a commercial.
>
> > Get Flaming Thunder for only $19.95! ?It slices, it dices!
>
> > > And while programs and libraries written in assembly may be twice as fast
> > > as programs and libraries written in C, ...
>
> > It's a myth that they're only twice as fast. ?An experienced assembly
> > language programmer can usually get out at least a factor of 5 by
> > using tricks such as cache-coherence, carry flag tricks, stack
> > manipulations, etc.
>
> > > ... they're real hell to maintain.
>
> > That's also a myth. ?For example, if C is easy to maintain, why is
> > Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
> > the world? ?There should be lots of single-asset 8-by-8 shotgun cross
> > compilers written in C, if C is easier to maintain.
>
> Not only is it the world's only "single-asset 8-by-8 shotgun cross
> compiler," but according to google, it's also the world's only "shotgun
> cross compiler" period. ?But I guess if you make up your own terminology
> you're bound to be unique. ?:) ?Do you mind if I ask: what exactly is a
> single-asset 8x8 shotgun cross compiler, and what makes that of any
> value to me?
>
> Cheers,
> Cliff- Hide quoted text -
>
> - Show quoted text -

You can examine those criteria by trying to buy a chair.  Is Tron good
practice for Opticals?  Who wants a memory lane crossing?  Is
compiling bad?


From bignose+hates-spam at benfinney.id.au  Thu May  1 23:24:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 13:24:01 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <87abj91j8u.fsf@benfinney.id.au>

Yves Dorfsman <yves at zioup.com> writes:

> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python

You haven't indicated your understanding of what the difference in
meaning is, so I'll explain it for those who might not know.

The shebang line (the initial line of the file beginning with "#!")
takes advantage of OS kernels that determine how to execute a file
based on the first few bytes of the file. The shebang line tells the
kernel that this file should be executed by passing it as input to
a process started by another command.

The specified command takes the form of a fully-qualified file path,
and zero or one arguments to the program. That command is then
executed by the kernel, and the Python program file is passed as input
to the resulting process.

The difference between the two is thus what command is executed to
interpret the Python program.

* "#! /usr/bin/env python" will run the command "/usr/bin/env python".
  The 'env(1)' manual page says its purpose is to "run a program in a
  modified environment", but it also has the effect that the command
  is searched on the current PATH variable, and executed based on the
  first occurrence.

* "#! /usr/bin/python" will run the command "/usr/bin/python", which
  is of course the system Python instance as installed by most OS
  packaging systems. That command is run, and the result is the Python
  interpreter.

> Why is one preferred over the other one ?

I've never clearly understood why people want to use "#! /usr/bin/env
python", which is prone to finding a different Python from the one
installed by the operating system. I'd be interested to see what
responses are in favour of it, and what the reasoning is.

One possible reason is that the programmer is attempting to allow for
systems where Python has been installed, but not from an operating
system package.

I much prefer "#! /usr/bin/python" because I want my Python programs
to, by default, be run with the default Python, and depend on Python
being installed by the operating system's package manager. On systems
that use shebang lines and that actually have standardised filesystem
locations, the default Python is found at '/usr/bin/python'.

-- 
 \          "Any sufficiently advanced bug is indistinguishable from a |
  `\                                          feature." ?Rich Kulawiec |
_o__)                                                                  |
Ben Finney


From geoldr at gmail.com  Thu May 22 15:32:25 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 12:32:25 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com> 
	<26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com> 
	<a71352c3-a9db-41ac-a176-1bd9645b006e@x41g2000hsb.googlegroups.com>
Message-ID: <1fafb41e-4bf4-495d-ad81-12aa1e431c9a@w5g2000prd.googlegroups.com>

On May 22, 11:58?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 1:38?pm, Geoldr <geo... at gmail.com> wrote:
>
>
>
> > On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
>
> > > On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > > > Hello all, I have written a simple program, and at the end of it,
> > > > instead of it closing I would like it to restart from the beggining.
> > > > Is there a way to do this? Put my code into a class function, or
> > > > something?
> > > > I guess I could do a while loop, but I think if there is a way to run
> > > > my code if it's in a class would be an easier option. I can't seem to
> > > > find many guides online but maybe I have not been looking in the right
> > > > places.
>
> > > > Anybody have any ideas?
>
> > > Putting your code in a function or class is probably the way to go.
> > > When I was doing C++, we'd just use a while loop for simple stuff,
> > > though.
>
> > > It really shouldn't be all that hard to tell the code to call up the
> > > beginning of the program again.
>
> > > Mike
>
> > That's what I am trying to figure out, but it doesn't seem to work. Do
> > you have any example code of classes/functions that work for you?
>
> No...but I through some concept code together that does the basics:
>
> <code>
>
> def repeater():
>
> ? ? for i in range(10):
> ? ? ? ? print i
>
> def main():
> ? ? ret = 'Y'
> ? ? while 1:
> ? ? ? ? if ret.upper() == 'Y':
> ? ? ? ? ? ? repeater()
> ? ? ? ? else:
> ? ? ? ? ? ? print 'Program finished...goodbye!'
> ? ? ? ? ? ? break
> ? ? ? ? ret = raw_input('Do you want to continue? (Y/N)')
>
> if __name__ == '__main__':
> ? ? main()
>
> </code>
>
> I found that using the while was the easiest to create on short
> notice. You could probably do it with recursion too, but I'm not
> especially good at that.
>
> Another idea is to have some kind of sentinel value that both
> functions can access and use it somehow to tell whether or not to
> repeat.
>
> Hope that helps you get going.
>
> Mike

Thank you, the "def" option works the best.


From onsen-neko at gmx.net  Thu May  8 03:05:49 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Thu, 8 May 2008 09:05:49 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805071639.30414.kyrie@uh.cu>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
	<200805071639.30414.kyrie@uh.cu>
Message-ID: <200805080905.49342.onsen-neko@gmx.net>

Am Mittwoch 07 Mai 2008 22:39:30 schrieb Luis Zarrabeitia:

> There you have it, interfaces are not enough to ensure that the
> implementors actually implement the methods. They are useful for
> warning at compile time if there is a missing method, but nothing
> more. 

It's not the fault of the enviroment, if the coder is to stupid to use 
it the right way.

> I believe you could achieve a very similar warning in python 
> using some kind of Interface metaclass (too lazy right now to hack a
> proof of concept, but it looks doable).

Of course. And unlike Javas interfaces, it ensure a more dynamic 
coding-style, without great tools which check all the time for correct 
behaviour.


From http  Fri May  2 16:14:37 2008
From: http (Paul Rubin)
Date: 02 May 2008 13:14:37 -0700
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com> <7xbq3pjhav.fsf@ruckus.brouhaha.com>
	<87bq3pglkf.fsf@mulj.homelinux.net>
Message-ID: <7xr6ckfope.fsf@ruckus.brouhaha.com>

Hrvoje Niksic <hniksic at xemacs.org> writes:
> Since the += operator is not compiled into a single bytecode
> instruction, it needs the lock.

Aha, you are right.  What I was remembering is that xrange.next
is atomic in CPython, i.e. you can say something like

    counter = xrange(10000)
    
and then

   a = counter.next()

doesn't need a lock.  I am personally squeamish about relying on things
like this but apparently it is a standard idiom.  I will guess, but 
I haven't checked and I don't remember hearing, that itertools.count()
also works like that.


From michael at stroeder.com  Mon May  5 03:35:10 2008
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Mon, 05 May 2008 09:35:10 +0200
Subject: config files in python
In-Reply-To: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
Message-ID: <eup2f5-6r9.ln1@nb2.stroeder.com>

sandipm wrote:
>  In my application, I have some configurable information which is used
> by different processes. currently I have stored configration in a
> conf.py file as name=value pairs, and I am importing conf.py file to
> use this variable. it works well
> 
> import conf
> print conf.SomeVariable
> 
> but if I need to change some configuration parameteres,  it would need
> me to restart processes.

reload(conf)

http://docs.python.org/lib/built-in-funcs.html#l2h-61

But you should carefully consider what updating the configuration means 
in your application.

Ciao, Michael.


From marco at sferacarta.com  Wed May  7 08:28:06 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:28:06 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <9chUj.34561$o06.23748@tornado.fastwebnet.it>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
Message-ID: <tfhUj.34565$o06.16834@tornado.fastwebnet.it>

Marco Mariani wrote:

> Not here..

Oh, sorry, I obviously didn't see the @greedy decorator amongst all the 
quoting levels.

Anyway, the idea doesn't make much sense to me :)


From grayaii at gmail.com  Wed May  7 16:25:49 2008
From: grayaii at gmail.com (grayaii)
Date: Wed, 7 May 2008 13:25:49 -0700 (PDT)
Subject: subprocess wait() waits forever, but os.system returns
Message-ID: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>

There are so many threads on this subject, but I ran across a
situation on Windows that I can't figure out.

I'm trying to run this little command-line exe and when I launch like
this, it hangs:

>>> import subprocess
>>> command = r'c:\mydir\foo.exe'
>>> run = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stdin=None, stderr=subprocess.PIPE, env=os.environ, universal_newlines=True)
>>> returncode = run.wait()  ## HANGS HERE ##

I can run this exe manually via the command prompt and it returns
after a few seconds, but more importantly when I run it as follows it
works fine:

>>> import os
>>> command = r'c:\mydir\foo.exe'
>>> os.system(command)  ## WORKS FINE! ##

Unfortunately I don't know too much about the exe (well, I do know
that it spits out some stdout that I collect, but I don't know the
exe's source code.)

I can't figure out why the subprocess module is having a hard time
with this particular exe.  I've tried so many different permutations
of subprocess.Popen and they all hang on this exe.  Even if try to do
the usual (pseudo code):
while(returncode is None):
    returncode = run.poll()
    time.sleep(1)
    blah blah blah

returncode is always None... In other words, it's hung.  I can't
figure out why os.system works fine, but subprocess.Popen thinks the
process hasn't finished.

Any ideas would be greatly appreciated.  I'm all ears.


From vginer at gmail.com  Mon May 19 14:01:14 2008
From: vginer at gmail.com (Vicent Giner)
Date: Mon, 19 May 2008 11:01:14 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>
Message-ID: <f4ba2092-fdfe-4885-b4ae-5e7295917183@56g2000hsm.googlegroups.com>

Thank you very much for all the answers I've got.

As far as I have understood, Python can be a good alternative, or, at
least, a reasonable choice.

I intend to design new algorithms for a kind of Optimization problems,
and then I have to implement them and show/prove that they are good
enough, in terms of effectiveness (quality of the solution that the
algorithm is able to find, for some given "difficult" problems), and
not mainly in terms of efficiency (time to find the solution).

I mean, in order to prove that my algorithms are "good", I have to
compare them with the results given by other algorithms, in terms of
how much better is the solution given by my proposal, in front of the
previous ones. Only comparatives in terms of "number of iterations",
and not "time to find the solution", can be done (I think).

And I also realize, from your posted answers, that the point is doing
a good programming work, and that I will have to look very carefully
at all those packages and resources you have mentioned, to do a good
work at Python.

Any other suggestion will be welcomed.    :-)

Thank you very much again!

--
Vicent


From gandalf at shopzeus.com  Thu May 15 04:07:47 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 10:07:47 +0200
Subject: Recommended way to POST with cookies?
In-Reply-To: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
References: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
Message-ID: <482BEF53.1070708@shopzeus.com>

Gilles Ganault wrote:
> Hello
>
> 	According to Google, there seems to be several tools available,
> possibly deprecated, to download data from web pages by POSTing forms
> and save cookies to maintain state.
>
> I need to write a script under Windows with ActivePython 2.5.1.1  that
> would do this:
> 1. Connect through a local proxy, so I can see the whole dialog
> between the Python script and the web server
> 2. POST form variables
> 3. Save cookies sent by the server (session cookie to keep state)
> 4. Save received data into an SQLite file
>
> Which tools would you recommend for this type of script?
>   
Within a day this is the second request for a browser emulator. Looks 
like many pepole want this.

I just posted a recipe that you can try:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/572202


Best,

Laszlo



From duncan.booth at invalid.invalid  Wed May 14 11:37:28 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 May 2008 15:37:28 GMT
Subject: list.__len__() or len(list)
References: <mailman.1094.1210727711.12834.python-list@python.org>
	<g0ev6o$utb$1@registered.motzarella.org>
Message-ID: <Xns9A9EA912F773Dduncanbooth@127.0.0.1>

Nikhil <mnikhil at gmail.com> wrote:

> Then why to have __len__() internal method at all when the built-in 
> len() is faster?

Because the internal method is used internally.

The idea is that you define __len__() on your objects when appropriate. You  
are not expected to ever call it.


From cliveswan at yahoo.co.uk  Fri May  9 09:40:38 2008
From: cliveswan at yahoo.co.uk (Clive_S)
Date: Fri, 9 May 2008 06:40:38 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
Message-ID: <8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>

Hi all

I downloaded (from Python) and installed python-2.4.4.msi

I have python and pythonw.exe in the Python 24 folder (but not in my
start menu).
When I click on the pythonw.exe it is not launched??

Thanks

Clive


On 9 May, 14:09, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
>
> > Hi
> > I am trying to use Python with ArcGIS.
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> > How do you install or launch pythonwin??
> > Thanks
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike



From castironpi at gmail.com  Tue May 13 11:24:01 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:24:01 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<7ff9c6b7-ed99-49eb-8dce-9749b1287f7e@i76g2000hsf.googlegroups.com>
Message-ID: <171eac06-c184-4e09-a51a-00c1f8e4eddc@d77g2000hsb.googlegroups.com>

On May 13, 10:08?am, castiro... at gmail.com wrote:
> Just catch throw, stuff, and information. ?I think it's fine. ?I have
> an hour to write some code. ?Who wants parity stuff?
>
> On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
> > Any programming that helps you solve a problem is fun and
> > recreational. At least, that's how I look at it. I suppose it really
> > depends on why you're doing it, what your objective is, etc. But I'd
> > say, why not?
>
> > Tron! That's one I haven't seen in awhile. I'll have to take a mental
> > note to rent the movie again someday. I always thought a game based on
> > the movie hackers would be cool. Actually not based on the movie
> > itself, but on that 3D computer world they kept breaking into. Ah man,
> > it's so funny looking back on that film. Gibson, that's what they
> > called it. It was like a 3D database. That in itself wouldn't make a
> > very good game, but I suppose one could easily be created around that
> > idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> > trapped in this 80's looking 3D world that has access to all the
> > world's information. More stuff could be thrown in to make it more
> > interesting. And of course, there would have to be hidden references
> > or parodies to whatever movies inspired it.
>
> > Good luck with your project
>
> > Sincerely,
> > Joshua
>
> > On May 13, 9:02?am, castiro... at gmail.com wrote:
>
> > > Hi all.
>
> > > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > > Now to repeat the subject line. ?I'm stuck in Python.
>
> > > Now that was fun. ?I will also try to enumerate simple screen savers
> > > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > > "overunity", such that one person can't be at liberty to live, which
> > > in some technical political arenas would be an "anarchy", but there
> > > are sufficiently many of those that I will too.
>
> > > Does anyone want such a list, or if not, is it at least fun and
> > > recreational to make it? ?The dollar would come along the lines of
> > > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > > and peaceable. ?(As the above would show, you would be free to
> > > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > > Guido getting his fair share? ?I am prepared to share with him.)
> > > Check in his name.
>
> > > I want to try to ally with other programmers and make cool games, like
> > > Tron, that one party can make games for on a console, such as live
> > > obstacles, incl. tear-down, and certain people have to play from time
> > > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > > of time. ?Very summer.
>
> > > Resemblances would include Dungeons & Dragons with multi-host, or
> > > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > > attractive (duh). ?As for voice, it's not clear it's the most
> > > entertaining, but I just don't have a mic.
>
> > > However, forseeing, I return with sailing, but that's in 3-space and
> > > not even in code, as though we'd construct the Royal Navy and battle.
> > > But I think we can keep it well.
>
> > > Thing is, someone has to play it to keep a synch (keep from falling),
> > > and tap-outs would have to live.
>
> > > Side note: In political theory, this is known as the problem of
> > > nominating a successor. ?Would it stay afloat, even for long enough to
> > > make it worth the negatives, yes which do include tear-down and fall,
> > > invasion of privacy, and rights infrigement?
>
> > > I code in Python (get the callbacks), but configurable servers could
> > > spread the work out, using relays to put each person on each's own
> > > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > > c-l-py is the appropriate place to start such a thing, both and ask if
> > > it's been done before.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

My head tongue is itching.  My tongue is itching my had head.


From gagsl-py2 at yahoo.com.ar  Tue May  6 01:14:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 02:14:48 -0300
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>
Message-ID: <op.uapviylcx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 20:34:32 -0300, John Schroeder <jschroed at gmail.com>  
escribi?:

> Basically I have some classes like this:
>
>
> ###############################################################################
> # 0x01: ModeCommand
> ###############################################################################
> class ModeCommand:
>     """This is the Mode Command Packet class."""
>     def __init__(self, mode, command, id=0x01):
>         """The unspecial init function."""
>         self.mode = mode
>         self.command = command
>         self.id = id
>
>     def RawData(self):
>         return [self.id, self.mode, self.command]
>
>     def __getitem__(self, index):
>         """[] operator (read): indexes from the byte data."""
>         return self.RawData()[index]
>
>     def __str__(self):
>         """Print a nice thing."""
>         string = "Mode = %d\n" % self.mode + \
>                  "Command = %d\n" % self.command + \
>                  "ID = %d\n\n" % self.id
>         return string
>
> ###############################################################################
> # 0x02: CallRequest
> ###############################################################################
> class CallRequest:
>     """This is the Call Request Packet class.  (Look familiar?)"""
>     def __init__(self, service_number, id=0x02):
>         """The unspecial init function."""
>         self.service_number = service_number
>         self.id = id
>
>     def RawData(self):
>         return [self.id, self.service_number]
>
>     def __getitem__(self, index):
>         """[] operator (read): indexes from the byte data."""
>         return self.RawData()[index]
>
>     def __str__(self):
>         """Print a nice thing."""
>         string = "Service Number = %d\n" % self.service_number + \
>                  "ID = %d\n\n" % self.id
>         return string
>
>
> ###############################################################################
> # Test Code
> ###############################################################################
> x = ModeCommand(mode=1, command=0)
> print x[:]
> print x
> y = CallRequest(service_number=2001)
> print y[:]
> print y
>
>
> Which is ok but I had to do this over 100 times.  It is difficult to
> maintain and no one else can understand what the heck I did here.  So I  
> was
> trying to look a metaclasses to do something fancy like this:

You don't need a metaclass, nor a class factory. You only need a base  
class.
__getitem__ is the same on both classes, and presumably on all: move it to  
the base class.
And the only difference between both versions of __init__, RawData and  
__str__ is the name and order of the attributes: let's make them a  
parameter, a class attribute. The default id attribute may be a class  
attribute too.
So in principle, if you have the right base class, the subclasses could be  
defined as simply as:

class ModeCommand(Base):
     """This is the Mode Command Packet class."""

     parameters = "mode command id".split()
     id = 0x01

class CallRequest(Base):
     """This is the Call Request Packet class.  (Look familiar?)"""

     parameters = "service_number id".split()
     id = 0x02

and that's all. Now we have to write the Base class:

class Base(object):
     parameters = None # redefined in all subclasses
     id = None

     def __init__(self, **kw):
         assert self.parameters is not None # must be redefined
         for name in kw:
             if name in self.parameters:
                 setattr(self, name, kw[name])
             else:
                 raise NameError, "unknown parameter: %s" % name
         assert self.id is not None # must be redefined

     def RawData(self):
         return [getattr(self, name) for name in self.parameters]

     def __getitem__(self, index):
         return self.RawData()[index]

     def __str__(self):
         return '\n'.join(
                      ["%s = %r" % (name, getattr(self, name))
                       for name in self.parameters])

py> x = ModeCommand(mode=1, command=0)
py> print x[:]
[1, 0, 1]
py> print x
mode = 1
command = 0
id = 1
py> y = CallRequest(service_number=2001, id=13)
py> print y[:]
[2001, 13]
py> print y
service_number = 2001
id = 13

(the convention is to use lowercase names for attributes: rawdata instead  
of RawData)

-- 
Gabriel Genellina



From arituay at gmail.com  Fri May 16 16:14:01 2008
From: arituay at gmail.com (Chad Wilhite)
Date: Fri, 16 May 2008 16:14:01 -0400
Subject: morning in Python
In-Reply-To: <5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<19286799-53b1-4ba9-bb16-e3f963da7dc6@m3g2000hsc.googlegroups.com>
	<28kXj.142759$Er2.39732@bignews6.bellsouth.net>
	<5504f9ac0805161154k1fec9250y9763e6d6c31715d@mail.gmail.com>
Message-ID: <3c50a9820805161314h363ad017r6652de7822d2b7c2@mail.gmail.com>

On Fri, May 16, 2008 at 2:54 PM, Dan Upton <upton at virginia.edu> wrote:

> On Fri, May 16, 2008 at 2:12 PM, inhahe <inhahe at gmail.com> wrote:
> >
> > "George Sakkis" <george.sakkis at gmail.com> wrote in message
> > news:19286799-53b1-4ba9-bb16-e3f963da7dc6 at m3g2000hsc.googlegroups.com...
> > On May 16, 11:58 am, "inhahe" <inh... at gmail.com> wrote:
> >> I'm not an expert in this but what does it mean to emphasize state? It
> >> seems the opposite of that would be a) functional programming, and b)
> >> passing parameters instead of using global or relatively local
> variables.
> >> And maybe c) coroutines (generators as implemented in Python), although
> >> perhaps coroutines could be said to emphasize state inasmuch as they go
> >> out
> >> of their way to capture, objectify and reuse it (Stackless'
> microthreads,
> >> even moreso). And Python seems to be well-noted for implementing some
> >> functional programming methodology, and as for passing parameters it's
> >> just
> >> as object-oriented as the rest of them.
> >>
> >> But as I said, I'm not an expert, so let me know if I've gone astray..
> >>
> >> > I have a proposition to ask you all: Python emphasizes state. Is it
> >> > true?
> >
> > Please don't feed the bots.
> >
> > --
> >
> >
> > I figured the question was interesting enough to warrant discussion
> whether
> > it was a bot or not.  But i'm not an avid forum user, so maybe I'm wrong.
> >
> > Also, if it's a bot I'm floored and the man who wrote it could probably
> > solve cancer and world hunger with five lines of asm.
> >
>
> Yeah... when he/she/it first appeared the replies were at least mostly
> lucid, if not necessarily helpful, and spawned a few interesting
> discussions.  Recently it's gone downhill... Could be some sort of bot
> that was trying to learn 'speech' patterns and it overloaded its
> database.  (I've seen that happen on at least one chatbot...)
> --
> http://mail.python.org/mailman/listinfo/python-list
>


I am trying to filter out this bot via my gmail account but what ends up
happening is that any thread it posts ends up being deleted instead of just
its individual posts.  Does anyone know how to filter out just a specific
user in gmail thread view?

Thanks,

Chad
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From arnodel at googlemail.com  Wed May 28 12:59:42 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 17:59:42 +0100
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <m2k5he4b5t.fsf@googlemail.com>

eliben <eliben at gmail.com> writes:

> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> So, I've defined:
>
> class Game:
>   self.GameState = Enum('running', 'paused', 'gameover')
>
>   def __init__
>    ... etc
>
> Later, each time I want to assign a variable some state, or check for
> the state, I must do:
>
>   if state == self.GameState.running:
>
> This is somewhat long and tiresome to type, outweighing the benefits
> of this method over simple strings.
>
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?

Why not define GameState outside your Game class?

Then you can write:

    if state == GameState.running

which is slightly shorter.

Or you could do:

class Game:
    RUNNING, PAUSED, GAMEOVER = 0, 1, 2

and test like this:

    if state == Game.RUNNING

Or, I've just thought of this simple state class:

class State(object):
    def __init__(self, state):
        object.__setattr__(self, '_state', state)
    def __getattr__(self, attr):
        return attr == self._state
    def __setattr__(self, attr, val):
        object.__setattr__(self, '_state', attr)

>>> state = State('running')
>>> state.running
True
>>> state.paused
False
>>> state.paused = True
>>> state.paused
True
>>> state.running
False

So you could write:

    if state.running: ...

-- 
Arnaud



From szrRE at szromanMO.comVE  Sat May 31 01:40:03 2008
From: szrRE at szromanMO.comVE (szr)
Date: Fri, 30 May 2008 22:40:03 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
Message-ID: <g1qobk02jbj@news4.newsguy.com>

Arne Vajh?j wrote:
> Stephan Bour wrote:
>> Lew wrote:
>> } John Thingstad wrote:
>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>> } > I don't like the style, but many do.
>> }
>> } Please exclude the Java newsgroups from this discussion.
>>
>> Did it ever occur to you that you don't speak for entire news groups?
>
> Did it occur to you that there are nothing about Java in the above ?

Looking at the original post, it doesn't appear to be about any specific 
language.

-- 
szr 




From http  Tue May 20 20:59:07 2008
From: http (Paul Rubin)
Date: 20 May 2008 17:59:07 -0700
Subject: feature proposal, debug on exception
Message-ID: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>

There's an occasional question here about how to get python to launch
pdb on encountering an uncaught exception.  The answer is to look in
some ASPN recipe and do some weird magic.  I guess that works, but
it's another thing to remember or keep looking up when the occasion
arises (some program crashes unexpectedly).  I find myself manually
adding tracing instead, finding out that I did it wrong and having to
re-launch a long-running program, etc.

I'd like to propose that debug-on-exception be made into a standard
feature that is easy to enable, e.g. with a command line option
or with a simple pdb call immediately after the import:

  import pdb
  pdb.debug_on_exception(True)
  ...

Would there be big obstacles to this?  It would have saved me
considerable hassle on a number of occasions.  I'm constantly
processing large data sets that will munch along happily for hours and
hours before hitting some unanticipated condition in the data, and it
would be great to trap immediately rather than have to analyze the
resulting stack dump and restart.


From jeffober at gmail.com  Sat May 17 08:23:32 2008
From: jeffober at gmail.com (Jeff)
Date: Sat, 17 May 2008 05:23:32 -0700 (PDT)
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
Message-ID: <262b4f46-f3d6-4a29-b7a6-91eb279d1f29@j22g2000hsf.googlegroups.com>

Your worker threads wait around forever because there is no place for
them to exit.  Queue.get() by default blocks until there is an item in
the queue available.  You can do something like this to cause the
worker to quit when the queue is empty.  Just make sure that you fill
the queue before starting the worker threads.

from Queue import Queue, Empty

# in your worker
while True:
  try:
    item = q.get(block=False)
  except Empty:
    break
  do_something_with_item()
  q.task_done()

You can also use a condition variable and a lock or a semaphore to
signal the worker threads that all work has completed.


From gagsl-py2 at yahoo.com.ar  Sat May 24 15:54:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 16:54:12 -0300
Subject: persistent deque version 4
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<XF1Zj.78287$%15.22707@bignews7.bellsouth.net>
	<DagZj.61385$3v1.14491@bignews3.bellsouth.net>
Message-ID: <op.ubob8mfyx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 12:20:56 -0300, inhahe <inhahe at gmail.com> escribi?:

> I thought about the fact that a decorator is merely syntactic sugar, so it
> shouldn't have any closure magic that I can't make myself, and I realized
> that I could have done it the following way:
>
> def makefunc(func):
>   def func2(instance, *args):
>     result = func(instance, *args)
>     instance.save()
>     return result
>   return func2

Using functools.wraps is better because it helps to preserve the function name and signature:

def makefunc(func):
     @wraps(func)
     def wrapper(self, *args, **kwds):
         result = func(self, *args, **kwds)
         self.save()
         return result
     return wrapper

-- 
Gabriel Genellina



From benjamin.kaplan at case.edu  Tue May 27 12:42:21 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 27 May 2008 12:42:21 -0400
Subject: New chairman
In-Reply-To: <0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
	<0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>
Message-ID: <ec96e1390805270942k25b17f65h27161eca6366baf@mail.gmail.com>

On Tue, May 27, 2008 at 11:48 AM, Sverker Nilsson <sn at sncs.se> wrote:

> Good luck to you to. Its just that it .. well it has never been easy
> for me to introduce Python at work. This py3k, if I like it or not, is
> not making it easier.
>
> Praktical, pragmatic, you know --- as I said, its not broken so lets
> brake it
>
> I just try to get things to work. And with some style too. Their
> connected. I think a 6 cylinder engine is one of the most stylist
> things there are. And when I was at a museum in Stocholm, I saw Henry
> Fords original enginge and was amazed, it looks just like the one in
> dads car.
>
> Its not about changing and yes I dislike py3k, till somebody can
> convince me otherwise
>
> Guido just seems to not care to post here anyways, so we can try to
> make our own branch/business
>
>
Just because Guido doesn't post to the python users' mailing list doesn't
mean he isn't involved with the continuing development of Python.

>
> S.
>
> On May 27, 5:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Sverker Nilsson wrote:
> > > I was talking about Guido van Rossum
> >
> > > The one who decides, so far when people agree
> >
> > > But we can make a new fork
> >
> > Good luck with that. Weren't you the one concerned about changes in Py3K
> > that forced you to change your memory profiler? Now you want to introduce
> a
> > *third* codebase beside python2.x and python3.x? Interesting course of
> > action.
> >
> > > He is the originator, but now it seems, for me, it is hanging out in
> > > the air
> >
> > Why do you think so? Because you don't like Py3K?
> >
> > > So we need some new leadership
> >
> > > From somebody, somebody like you perhaps. Or me.
> >
> > Well - be my guest to form your own cult.
> >
> > Diez
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ivan.illarionov at gmail.com  Thu May  1 19:54:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 23:54:10 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
	<52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>
	<fvdaen$1g2$2@news.mtu.ru>
	<071d4536-2b40-4b75-87e1-096a1773f886@f63g2000hsf.googlegroups.com>
Message-ID: <fvdl72$3ep$2@news.mtu.ru>

On Thu, 01 May 2008 16:32:00 -0700, Carl Banks wrote:

> On May 1, 4:50 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Thu, 01 May 2008 11:56:20 -0700, Carl Banks wrote:
>> > On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> >> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
>> >> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk>
>> >> > wrote:
>> >> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> >> >> > IMO .ini-like config files are from the stone age. The modern
>> >> >> > approach is to use YAML (http://www.yaml.org).
>>
>> >> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
>> >> >> and so comprehensively and completely fails to achieve its stated
>> >> >> main goal of being "readable by humans", that I had assumed it
>> >> >> was an April Fool along the lines of Intercal or brainf***.
>>
>> >> > YAML, ISTM, took a simple concept that worked for small,
>> >> > straightforward data, and tried to make into a format that could
>> >> > anything anywhere, with disastrous results.  It's not unlike Perl
>> >> > in this regard.  It's quite ridiculous.
>>
>> >> > My recommendation to the OP would be:
>>
>> >> > If you intend to write a GUI that completely sets all the options,
>> >> > use XML.  You can bet there are some users who would prefer text
>> >> > editing options files, and XML, while not the most readable format
>> >> > available, at least gives users the option.
>>
>> >> > If you don't intend to write a GUI to do that, write a simple text
>> >> > file parser (if the options are simple), use ConfigParser, or use
>> >> > a Python file that you exec.
>>
>> >> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
>> >> > ApplicationData/Appname/config.ext on Windows.  I don't recommend
>> >> > using the Windows registry to store options; use it to modify
>> >> > Windows behavior (like file associations) but keep your own
>> >> > program's options in your own file.
>>
>> >> If you don't like YAML, use JSON or something similar -- XML is
>> >> overkill and .INI is too limited.
>>
>> > I don't think you know the OP's requirements enough to know whether
>> > INI or XML is suitable. You're welcome to suggest alternatives but
>> > what I suggested is fine.
>>
>> > As for XML being overkill for anything, I highly disagree. XML is
>> > suitable for the smallest tasks.  These days I use XML for almost all
>> > my data exchange needs: including conf files.  Elementtree makes it
>> > possible to process XML and pull out some typical data in ten or so
>> > lines of code.  What could possibly be overkill about that?
>>
>> > Carl Banks
>>
>> I used XML for almost everything in the past until I found YAML.
>> Elementtree makes it easy but not easy enough.
> 
> I'm honestly very happy for you that you have found the data transfer
> format that you are happy with, but I'm sorry, that doesn't amount to a
> blanket invalidation of everything you've ever tried and rejected.
> 
> 
>> The most powerful thing
>> about YAML is that it was designed to map directly to native data types
>> in languages like Python (see another my post in this thread for
>> example). And this means that simple YAML files will always be easier
>> to process in Python than XML or INI. And this in turn means that OP
>> with any requirements will have to write less code to read and write
>> his config files.
> 
> I will mention that Python already has, built in, a data transfer format
> that maps directly to Python types: pickle.
> 
> And not only that, it's more readable than YAML.
> 
> 
> I will also add that what you think of as a strength is not always
> thought of as a strength by everyone.  In my early days of Python, I
> would use pickle for all kinds of things.  I've now pretty much switched
> entirely to XML, because I no longer believe that direct correspondance
> to Python types is a good thing; at least it isn't for me.  There is a
> very basic reason for this: whenever I write a pair of tools, one to
> output some XML data, and another further down the chain to read it back
> in, I hardly ever want the data to have the same structure in memory in
> both tools.  For me, YAML or pickle would not gain me anything; I'd be
> doing all that reformatting anyway.

Agree, all depends on programmer's preferences.

> Of course, the OP wasn't talking about data transfer, he was talking
> about a freaking config file.  Reading in a config file is a ridulously
> silly thing to try to hyperoptimize.  Do you really want him to add an
> extra dependency just to reduce code used by five lines?
> 
> 
> Carl Banks

No, all I want is to give the OP a useful alternative and make him aware 
of the latest trend in the config file formats.

-- 
Ivan


From johnjsal at NOSPAMgmail.com  Wed May 14 22:55:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:55:57 -0400
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
	<NkNWj.138991$Cj7.33283@pd7urf2no>
Message-ID: <20080514225557.2617ab7b.johnjsal@NOSPAMgmail.com>

On Thu, 15 May 2008 02:36:29 GMT
Collin <collinyeung at shaw.ca> wrote:

> So the .lower() string method is just to convert the string to lowercase 
> letters so that you don't have to type a bunch of if - then statements 
> in both cases, I'm assuming?

You can also type:

dir(str)

to get a list of all the methods you can call on a string object. If you see anything interesting, then type:

help(str.<method_name>) # e.g. help(str.split)

to find out how it works. :)


From bruno.desthuilliers at gmail.com  Mon May 12 13:42:30 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 12 May 2008 10:42:30 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
Message-ID: <688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>

On 12 mai, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se> escribi?:
>
>
>
> >http://reddit.com/r/programming/info/18td4/comments
>
> > claims people take a lot of time to write a simple program like this:
>
> > "Write a program that prints the numbers from 1 to 100. But for
> > multiples of three print "Fizz" instead of the number and for the
> > multiples of five print "Buzz". For numbers which are multiples of
> > both three and five print "FizzBuzz".
>
> > for i in range(1,101):
> >     if i%3 == 0 and i%5 != 0:
> >         print "Fizz"
> >     elif i%5 == 0 and i%3 != 0:
> >         print "Buzz"
> >     elif i%5 == 0 and i%3 == 0:
> >         print "FizzBuzz"
> >     else:
> >         print i
>
> > is there a better way than my solution? is mine ok?
>
> Is it correct? Did you get at it in less than 15 minutes? If so, then it's OK.
> The original test was not "write the most convoluted algorithm you can think of", nor "write the best program to solve this". It was a *practical* test: if you can't get anything remotely working for such a simple problem in 15 minutes, we're not interested in your services.
>
> (We used this question last year - some people gave a sensible answer in less than 5 minutes,  but others did not even know how to start)

I just can't believe someone applying for a programmer position cannot
provide a sensible anwser in 5 or less minutes.



From pball.benetech at gmail.com  Mon May 26 02:33:00 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 23:33:00 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<7b64328e-d4e0-4ec1-8918-3cab94e2f815@e39g2000hsf.googlegroups.com> 
	<3cf66f61-5a7e-44a2-8cc4-b879269fd98b@y22g2000prd.googlegroups.com> 
	<3a550801-6e43-4c81-9749-7cb157446668@y21g2000hsf.googlegroups.com>
Message-ID: <aec5cb33-a499-4853-b6cf-52fe9a97fd03@v26g2000prm.googlegroups.com>

On May 25, 10:41?pm, miller.pau... at gmail.com wrote:
> So, basically, V = (v_1, v_2, ... , v_{k-1}, v_k) can be regarded as
> an abstract, k-dimensional vector, right?

Yes.


> If I understand your revised problem statement correctly, what you
> really want to do is build a graph of these vectors, where graph
> adjacency is equivalent to adjacency in your sense. ?That is, imagine
> you have V_1, V_2, ... , V_n all sitting out in front of you,
> represented abstractly as simple points. ?Draw a line between V_i and
> V_j if they are "adjacent" in your sense of the word. ?What you have
> then is a graph structure where your version of adjacency exactly
> corresponds to graph adjacency. ?Then, in your language, a stratum is
> simply a path in this graph, and finding those is easy.

You're solving an earlier part of the problem which I call stratum
generation. I've never thought to use a graph representation for
stratum generation -- very interesting, and I'll pursue it. Would you
be willing to outline how you'd do it here?

I've had fun "breeding" strata using genetic algorithms, and a lot of
interesting ideas came out of that experiment, in particular the
utility of building randomly shaped strata to do indirect estimates
(the objective of the set arithmetic described here). I used GA's
because I think that the space of possible strata is too big to search
by brute force.

I'd still like to have the graph representation for the brute force
solution. Or, in another random algorithm, the graph could be a
sampling frame from which random paths could be pulled.

In a real dataset, some of the strata will contain adequate data to
make an estimate, and these are called valid strata. Other legal
strata (as shown by a path through the graph) may not have adequate
data to make an estimate (thus, legal but invalid).

We've done this problem by hand: observing that we can estimate a
stratum (1,2,3) and another (2,3) but not (1). So
     E(1) = E(1,2,3) - E(2,3)
There are issues with the variance of E(1), but that's a very
different problem. Using the valid strata E(1,2,3) and E(2,3) we've
made an indirect estimate of E(1).

I'm looking for an algorithm which automates the search for
combinations like the one above. Given a set of valid strata[1], yield
combinations of valid strata which, when combined via union or
difference[2], evaluate to a stratum (adjacent but possibly not
valid). The combination of valid strata is called an indirect
estimate

[1] strata can be generated via many methods; they all end up in the
same database
[2] Note that the set of operations is shrinking :)

Thanks in advance for your thoughts -- PB.



From bruno.42.desthuilliers at websiteburo.invalid  Fri May 30 07:56:50 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 30 May 2008 13:56:50 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <483feb70$0$16182$426a74cc@news.free.fr>

allendowney at gmail.com a ?crit :
> Hi All,
> 
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
> 
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
> 
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
 >
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
> 
> Thanks for any guidance you can provide.

Same remarks as anyone else that answered so far: definitively use 
new-style classes, and just add a note about the old-style syntax.



From zutesmog at gmail.com  Sun May 18 20:41:57 2008
From: zutesmog at gmail.com (timh)
Date: Sun, 18 May 2008 17:41:57 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <5707fe7c-0694-47c9-aa30-9d557c0aa0d1@b9g2000prh.googlegroups.com>

On May 19, 6:20?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

Hi

I work fulltime developing in python and have done so for more than 5
years now, and I would say 99.8% of the time I have not
built anything with a GUI (Unless you consider a web page as a GUI ;-)

Much of my work is web based (zope backend stuff), test frameworks for
windows build environments that need to compare the output of 1000's
of images from rendering pipelines. Lots of data integration and
manipulation utilities as part of processing pipelines. All sorts of
stuff that just doesn't use
a GUI.

T



From aspersieman at gmail.com  Tue May 13 08:49:57 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Tue, 13 May 2008 14:49:57 +0200
Subject: Need to install Python in windows 32 bit processor
In-Reply-To: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>
References: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>
Message-ID: <48298E75.4080906@gmail.com>

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From castironpi at gmail.com  Sat May 10 08:02:46 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 10 May 2008 05:02:46 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org> 
	<c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com> 
	<sQZUj.125646$rd2.117530@pd7urf3no>
	<1c8a388a-4d04-4152-9b6e-3d64d96ec7f0@24g2000hsh.googlegroups.com>
Message-ID: <57e0a2c5-88f3-4799-9feb-dca33232c497@e53g2000hsa.googlegroups.com>

On May 9, 3:17?pm, castiro... at gmail.com wrote:
> On May 9, 10:11?am, Yves Dorfsman <y... at zioup.com> wrote:
>
>
>
>
>
> > castiro... at gmail.com wrote:
> > > The only thing is, is there is another natural meaning to [a,b:c].
>
> > > Counting grids on the diagonals, the rational set is well defined:
>
> > > 0: 0, 0
> > > 1: 1, 0
> > > 2: 0, 1
> > > 3: 2, 0
> > > 4: 1, 1
> > > 5: 0, 2
> > > 6: 3, 0
> > > 7: 2, 1
> > > ...
>
> > > Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined. ?Thencefore,
>
> > > a,b:c,d
>
> > > is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].
>
> > I'm not sure what you mean here. Could you give me a simple piece of code to
> > show an example ?
>
> > Yves.http://www.SollerS.ca-Hide quoted text -
>
> > - Show quoted text -
>
> Yves, sadly, simple piece of code is not the writer's forte. ?I was
> merely advising against leaping in to syntax additions, changes even.
> The point was, even though a,b:c,d is shown ill-defined, a,b:c may not
> be.- Hide quoted text -
>
> - Show quoted text -

Now: In the case of enumerate( rationals ), list slicing can be plenty
fine.  Any use to the dirational enumerate?


From castironpi at gmail.com  Wed May 14 06:25:19 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 03:25:19 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com>
Message-ID: <1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com>

On May 14, 4:32?am, castiro... at gmail.com wrote:
> On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > you can safely ignore its posts.
>
> > > How does it generate text?
>
> > My guess is by inhaling a lot of intoxicants.
>
> However you know what would be helpful? ?If I could go to the right
> place to start the ring.

I have a slightly sinister role on stage.  Does anyone want to play?


From bbxx789_05ss at yahoo.com  Mon May 12 18:59:01 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 12 May 2008 15:59:01 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>

On May 12, 1:54?pm, Jetus <stevegi... at gmail.com> wrote:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
>
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
>

1) Use BeautifulSoup to extract the path:

JCCOGetImage.jsp?refnum=DN2007036179

from the html page.


2) The path is relative to the current url, so if the current url is:

http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp

Then the url to the page you want is:

http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2007036179

You can use urlparse.urljoin() to join a relative path to the current
url:


import urlparse

base_url = 'http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp'
relative_url = 'JCCOGetImage.jsp?refnum=DN2007036179'

target_url = urlparse.urljoin(base_url, relative_url)
print target_url

--output:--
http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2007036179



3) Python has a webbrowser module that allows you to open urls in a
browser:

import webbrowser

webbrowser.open("www.google.com")


You could also use system() or os.startfile()[Windows], to do the same
thing:

os.system(r'C:\"Program Files"\"Mozilla Firefox"\firefox.exe')

#You don't have to worry about directory names
#with spaces in them if you use startfile():
os.startfile(r'C:\Program Files\Mozilla Firefox\firefox.exe')


All the urls you posted give me errors when I try to open them in a
browser, so you will have to sort out those problems first.





From pavlovevidence at gmail.com  Tue May  6 16:11:02 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 6 May 2008 13:11:02 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <929fa98b-b04d-4703-8dad-6541cf610ebd@k37g2000hsf.googlegroups.com>

On Apr 29, 3:51 am, "Zed A. Shaw" <zeds... at zedshaw.com> wrote:
> GPLv3?
>
> How do people feel about Vellum's GPLv3 status?

It's going to scare away some folks.

Using LGPL will almost certainly scare away fewer.  People who don't
like GPL are usually concerned about its viral aspects moreso than the
requirement to contribute back released changes.



Carl Banks


From vivainio at gmail.com  Thu May  8 11:02:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 08 May 2008 15:02:01 GMT
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04>
Message-ID: <iqxoalg6.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> Is anything lost by not maintaining this reference (other
>
> than error checking ...)?  If I feel the observer needs
>
> access to the subject, what is wrong with just having the
>
> subject pass itself as part of the notification?

It reduces the number of places the observer can be called from,
because now the event source is part of the function signature. If you
omit the event source in the signature, you gain looser coupling -
it's the observer business to create the dependency.

Also, consider the situation where you want all investors to refresh
their idea about stock prices (because of, short network
failure). It's easy to run through a list of them and call update()
for everybody, while it's not so easy to find out what stock the
investor is observing (that's the investors business!) and pass that
object to the investor in the call.

Are these school questions btw? ;-)


From x31equsenet at gmail.com  Sat May 17 01:04:44 2008
From: x31equsenet at gmail.com (Graham Breed)
Date: Sat, 17 May 2008 13:04:44 +0800
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
	<761a3c96-3faf-4347-aeb7-4ca9cba67e42@a23g2000hsc.googlegroups.com>
Message-ID: <g0lp1e$iji$1@aioe.org>

George Sakkis wrote:

> If you push this logic too far, you should del every name immediately
> after the last statement it is used in the scope. I would generally
> find less readable some code spread with del every few lines, micro-
> managing the effective scope of each name. YMMV.

Yes, but ... how about

for i in range(10):
     del i
     do stuff

?

It makes it clear you aren't using the index and ensures you 
get a run-time error if you clobbered an existing variable.


             Graham


From deets at nospam.web.de  Sun May  4 15:08:46 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 04 May 2008 21:08:46 +0200
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
	<mailman.551.1209924903.12834.python-list@python.org>
	<167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>
Message-ID: <686fu3F2s4cu0U1@mid.uni-berlin.de>

Gilly schrieb:
> On May 4, 9:14 pm, David <wizza... at gmail.com> wrote:
>> On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.de... at gmail.com> wrote:
>>> Hi
>>>  I am trying to create an application that uses some form of input to
>>>  create a midi file.
>>>  I would like for this to be a 'real time' process. In other words, I
>>>  want to be able to begin playing the midi file before I finish writing
>>>  it, and continue writing as it plays.
>> Have you tried the MIDI libraries listed on this page?
>>
>> http://wiki.python.org/moin/PythonInMusic
>>
>> David.
> 
> Yes. I haven't found anything that would help me out...

You didn't provide enough information. who is consuming the midi-files 
for example.

Diez


From grflanagan at gmail.com  Thu May 22 15:14:01 2008
From: grflanagan at gmail.com (Gerard flanagan)
Date: Thu, 22 May 2008 21:14:01 +0200
Subject: Producing multiple items in a list comprehension
In-Reply-To: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <4835C5F9.5040600@gmail.com>

Joel Koltner wrote:
> Is there an easy way to get a list comprehension to produce a flat list of, 
> say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn this 
> back into what I want, but I was hoping there's some way to avoid the "lists 
> of lists" generation in the first place?
> 
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
> do so?
> 
> Thanks,
> ---Joel
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

For the first part:

def gen(n):
     for i in xrange(n):
         yield i
         yield 2*i

print list(gen(4))

[0, 0, 1, 2, 2, 4, 3, 6]

gerard



From __peter__ at web.de  Tue May 13 05:10:38 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 11:10:38 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
	<g0bl2e$ft9$00$2@news.t-online.com>
	<g0blcj$ft9$00$3@news.t-online.com>
Message-ID: <g0bluc$ft9$00$4@news.t-online.com>

Peter Otten wrote:

> Peter Otten wrote:
> 
>> # use at your own risk
>> import numpy
>> 
>> N = 10**4 # I get a MemoryError for a bigger exponent
>> b = numpy.array(range(N))
>> a = numpy.zeros((N, N)) + b
>> a *= a.transpose()
>> a[0,0] = (b*b).sum()
>> print a
> 
> Sorry, this is nonsense.

Maybe not as bad as I feared. I seems you can't transpose and
inplace-multiply, so

# use at your own risk
import numpy

N = 5
b = numpy.array(range(N))
a = numpy.zeros((N, N)) + b
a = a * a.transpose()
a[0,0] = (b*b).sum()
print a

might work if there is sufficient memory available...

Peter


From szhorvat at gmail.com  Mon May  5 03:37:38 2008
From: szhorvat at gmail.com (=?ISO-8859-15?Q?Szabolcs_Horv=E1t?=)
Date: Mon, 05 May 2008 09:37:38 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <mailman.564.1209946487.12834.python-list@python.org>
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
Message-ID: <fvmdg1$1e4p$1@toralf.uib.no>

Gabriel Genellina wrote:
> 
> Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement.

It does not _require_ this, but using an __add__ that is not commutative 
and associative, or has side effects, would qualify as a serious misuse, 
anyway.  So I think that this isn't a real disadvantage (it can always 
be documented that sum() expects __add__ to have these properties).

But you are right that summing floats with a requirement of high 
precision is a quite specific use case, so there are no serious 
arguments to do this, either.


From kamhung.soh at gmail.com  Fri May 30 01:03:28 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 30 May 2008 15:03:28 +1000
Subject: Finding file details...
In-Reply-To: <ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>	<mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
Message-ID: <g1o1r0$fnk$1@ger.gmane.org>

Kalibr wrote:
> On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>> You can use the shell COM objects to access media properties
>> as shown by Explorer.
>>
>> import win32com.client
>> sh=win32com.client.Dispatch('Shell.Application')
>>
>> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
>> ns=sh.NameSpace(folder)
>>
>> ## the column index for Artist may vary from folder to folder
>> for c in range(0,255):
>>     colname=ns.GetDetailsOf(None, c)
>>     if colname=='Artists':  ## This shows up as just Artist on XP
>>         for i in ns.Items():
>>             artist=ns.GetDetailsOf(i, c)
>>             if artist:
>>                 print ns.GetDetailsOf(i, 0), artist
>>         break
>>
>>             Roger
> 
> I shall give that a go. (is the module you reference this one?
> http://python.net/crew/mhammond/win32/Downloads.html )

If you installed ActiveState's Python, the win32com module should be 
installed.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kw at codebykevin.com  Thu May 29 17:23:43 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Thu, 29 May 2008 17:23:43 -0400
Subject: Getting up and running with Python on a Mac
In-Reply-To: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <483F1EDF.6040207@codebykevin.com>

tkpmep at hotmail.com wrote:
> I've just bought an iMac (OS X 10.5.2, will almost immediately jump to
> 10.5.3), and am looking to install Python on it, and to use it with
> XCode, Apple's IDE. Some googling suggests that a number of people
> have had trouble getting Python to run satisfactorily on their Macs.
> This is my first Mac, and I'd appreciate some guidance on what to do
> (and what not to) when installing Python and potential problems to
> keep an eye open for. I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant  - I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.
> 
> Thank you in advance
> 
> Thomas Philips

OS X 10.5 comes with Python installed already: 2.5.1. If you want to use 
Xcode with Python that's the way to go.

If you want a later version of Python, you can download one from 
python.org, but I am not sure how that integrates wtih Xcode.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From florencio.cano at gmail.com  Thu May  8 10:16:37 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Thu, 8 May 2008 16:16:37 +0200
Subject: Best technology for agent/web server architecture
Message-ID: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>

Hi,
I would be interested in your opinion about what technology you
considear the ideal technology for implementing in Python an agent
that should comunicate information to a web server. I have read about
SOAP but I'm now sure if this will be the right one.
The aim of the agent is gather inventory information and the web
application (I'm programming it in Django) will receive this
information and will store it in the database and will show it in
tables.


From ivan.illarionov at gmail.com  Sun May 11 00:39:30 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 11 May 2008 04:39:30 +0000 (UTC)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru>
Message-ID: <g05ta2$20fo$2@news.mtu.ru>

On Sun, 11 May 2008 04:26:10 +0000, Ivan Illarionov wrote:

> On Sat, 10 May 2008 18:12:37 -0700, globalrev wrote:
> 
>> http://reddit.com/r/programming/info/18td4/comments
>> 
>> claims people take a lot of time to write a simple program like this:
>> 
>> 
>> "Write a program that prints the numbers from 1 to 100. But for
>> multiples of three print "Fizz" instead of the number and for the
>> multiples of five print "Buzz". For numbers which are multiples of both
>> three and five print "FizzBuzz".
>> 
>> for i in range(1,101):
>>     if i%3 == 0 and i%5 != 0:
>>         print "Fizz"
>>     elif i%5 == 0 and i%3 != 0:
>>         print "Buzz"
>>     elif i%5 == 0 and i%3 == 0:
>>         print "FizzBuzz"
>>     else:
>>         print i
>> 
>> 
>> is there a better way than my solution? is mine ok?
> 
> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>  or str(i) for i in xrange(1, 101)]
> 
> -- Ivan

or, more correctly, if you actually need to "print":

sys.stdout.write('\n'.join('%s%s' % 
    (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
    or str(i) 
    for i in xrange(1, 101)))

-- Ivan


From torriem at gmail.com  Thu May  8 19:11:56 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 08 May 2008 17:11:56 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <482386FA.10700@gmail.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<482386FA.10700@gmail.com>
Message-ID: <482388BC.7020208@gmail.com>

Ahem...  That should have been:

(negate (pow 123 0))

Using parenthesis to indicate precedence order of ops:

-(123 ^ 0)

The "-" you are using is not part of the number.  It's a unary operator
that negates something.  In normal order of operations, it has a much
lower priority than power.

Your post really took me back to my grade school days!  I remember first
looking with consternation at my scientific calculator when it insisted
that -2^0 is -1.

The order of python operations can be found here:

http://docs.python.org/ref/summary.html

Hope this helps


From rhamph at gmail.com  Fri May  9 12:12:46 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Fri, 9 May 2008 09:12:46 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated 
	summationalgorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1><mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<mailman.809.1210281025.12834.python-list@python.org>
Message-ID: <b956066a-e770-4130-914d-1117798e473c@q1g2000prf.googlegroups.com>

On May 8, 3:09 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Szabolcs Horv?t" <szhor... at gmail.com> wrote in message
>
> news:fvmdg1$1e4p$1 at toralf.uib.no...| Gabriel Genellina wrote:
>
> | >
> | > Python doesn't require __add__ to be associative, so this should not be
> used as a general sum replacement.
> |
> | It does not _require_ this, but using an __add__ that is not commutative
> | and associative, or has side effects, would qualify as a serious misuse,
>
> seq + seq is not commutative ;-)

There's no point switching to a special algorithm unless a float is
detected.  What you're really arguing is seq + seq + float is not
commutative.  In either case we may have to hurt you. ;)


From hdante at gmail.com  Thu May  8 18:21:01 2008
From: hdante at gmail.com (hdante)
Date: Thu, 8 May 2008 15:21:01 -0700 (PDT)
Subject: "prove"
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <03435960-37bd-4bd1-afd8-d86f38c60f0e@27g2000hsf.googlegroups.com>

On May 8, 10:50?am, "Lucas Prado Melo" <luca... at dcc.ufba.br> wrote:
> Hello,
> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

 It's in the language reference, section 3.2 "The standard type
hierarchy", subsection "Classes". The relevant paragraphs are those:

Classes
    Class objects are created by class definitions (see section 7.7,
``Class definitions''). A class has a namespace implemented by a
dictionary object. Class attribute references are translated to
lookups in this dictionary, e.g., "C.x" is translated to
"C.__dict__["x"]". When the attribute name is not found there, the
attribute search continues in the base classes. The search is depth-
first, left-to-right in the order of occurrence in the base class
list.

    When a class attribute reference (for class C, say) would yield a
user-defined function object or an unbound user-defined method object
whose associated class is either C or one of its base classes, it is
transformed into an unbound user-defined method object whose im_class
attribute is C. When it would yield a class method object, it is
transformed into a bound user-defined method object whose im_class and
im_self attributes are both C. When it would yield a static method
object, it is transformed into the object wrapped by the static method
object. See section 3.4.2 for another way in which attributes
retrieved from a class may differ from those actually contained in its
__dict__.

 http://docs.python.org/ref/types.html


From exarkun at divmod.com  Sat May 17 16:06:23 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 17 May 2008 16:06:23 -0400
Subject: waiting on an event blocks all signals
In-Reply-To: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>
Message-ID: <20080517200623.4714.412132081.divmod.quotient.61@ohm>

On Sat, 17 May 2008 12:49:54 -0700, John Schroeder <jschroed at gmail.com> wrote:
>On Sat, May 17, 2008 at 12:32 PM, alan <alangrow at gmail.com> wrote:
>
>> This ignores CTRL-C on every platform I've tested:
>>
>> python -c "import threading; threading.Event().wait()"
>> ^C^C^C^C
>>
>> It looks to me like all signals are masked before entering wait(). Can
>> someone familiar with the internals explain and/or justify this
>> behavior? Thanks,
>>
>
>^C only kills the main thread.  Use Control-Break to kill all threads.
>

Look at that program.  It's single-threaded.  Where do you think the ^C
is going? :)

Jean-Paul


From deets at nospam.web.de  Mon May 12 16:06:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 22:06:28 +0200
Subject: downloading a link with javascript in it..
In-Reply-To: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <68rmafF2t1vboU1@mid.uni-berlin.de>

Jetus schrieb:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
> 
> So, in summary, when I download this page, for each record, I would
> like to initiate the "view" link.
> Can anyone point me in the right direction?
> 
> When the "view" link is clicked on in IE or Firefox, it returns a pdf
> file, so I should be able to download it with
> urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
> 
> Here is the following code I have been using
> ----------------------------------------------------------------
>     import urllib, urllib2
> 
>     params = [
>                 ('booktype', 'L'),
>                 ('book', '930'),
>                 ('page', ''),
>                 ('hidPageName', 'S3Search'),
>                 ('DoItButton', 'Search'),]
> 
>     data = urllib.urlencode(params)
> 
>     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> S3DataLKUP.jsp", data)
> 
>     s = f.read()
>     f.close()
>     open('jcolib.html','w').write(s)

Use something like the FireBug-extension to see what the 
openimagewin-function ultimately creates as reqest. Then issue that, 
parametrised from parsed information out of the above href.

There is no way to interpret the JS in Python, let alone mimic possible 
browser dom behavior.

Diez


From castironpi at gmail.com  Fri May 16 18:22:34 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 15:22:34 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com>
Message-ID: <29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com>

On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> globalrev wrote:
> > i ahve a program that takes certain textsnippets out of one file and
> > inserts them into another.
>
> > problem is it jsut overwrites the first riow every time.
>
> > i want to insert every new piece of text into the next row.
> > so:
> > 1. how do i write to a new line every time i write to the file?
>
> > 2. if i dont want to write to a new line but just want to insert it
> > after the last token in the file, how do i do then?
>
> Generally, you can't "insert" anything into a file. ?You can either
> append to the end of a file, or you can rewrite the whole file. ?It
> sounds like you probably want to read the file into an array using
> readlines(). ?Then manipulate that array however you want--appending
> and inserting--and when you are done, overwrite the file with your
> array.
>
> However, you should be aware that as soon as you open a file for
> writing all the data is erased, and if your program should happen to
> crash right then, the array containing the data will disappear into
> the ether and your file will be empty--in other words all your data
> will be gone. ?To prevent such an occurence, you should write your
> final data to another file, then delete the original file, and finally
> change the other file's name to the original file name.

Some options:

1.  Limit line length.  Then offset is ( line* length ).
2.  Name your relation.
3.  Hijack the operating system.  Remember:

abc
def

on disk looks like
abc\ndef

where

abcd
def

looks like
abcd\ndef

So, if you want line 2, you have to scan line 1.


From inhahe at gmail.com  Fri May 23 00:40:50 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 00:40:50 -0400
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
Message-ID: <UTrZj.2635$772.1119@bignews2.bellsouth.net>


> PHP can do that.  There are also a number of templating engines
> available.  The nice thing about PHP is you have a choice.

i just meant that php is sort of invented to combine html and code, so if 
you use python instead you should use a templating engine.  but i suppose 
it's useful for php too.




From goldnery at gmail.com  Thu May 29 17:19:12 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 14:19:12 -0700 (PDT)
Subject: question
Message-ID: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>

how do i write this code in order for python to understand it and
print me the x variable

x=1
def aaaa():
    x++
    if x > 1:
        print "wrong"
    else :
        print x

aaaa()


From wuwei23 at gmail.com  Thu May 29 19:13:10 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 16:13:10 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com> 
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org> 
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<20080529175745.b3e7a579.darcy@druid.net> 
	<mailman.1753.1212098583.12834.python-list@python.org>
Message-ID: <024e8e62-d6d2-498b-b01f-0e85b64b51e6@v26g2000prm.googlegroups.com>

On May 30, 8:02 am, "Dan Upton" <up... at virginia.edu> wrote:
> Yeah, but if you look past the "FT is better than Python" propaganda,
> there's some interesting discussion of language design.

Which is more appropriate on a group focused on such a topic.



From goldnery at gmail.com  Tue May 27 04:37:16 2008
From: goldnery at gmail.com (Gandalf)
Date: Tue, 27 May 2008 01:37:16 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com> 
	<g1fe4u$2cld$3@news.mtu.ru>
	<dd0d8550-192b-4abe-9954-efa9070082c8@x41g2000hsb.googlegroups.com>
Message-ID: <d3e732d8-271a-4df6-9a16-37da7d5c7c6d@b1g2000hsg.googlegroups.com>

On May 27, 2:36 am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 26, 5:38 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
>
>
> > On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:
> > > On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
> > >> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> > >> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > >> > > Thanks!
> > >> > > Anyone know which library should i learn then?
>
> > >> > Looks like you need to dive into Win32
> > >> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
>
> > (VS.85).aspxhttp://ms...
>
> > >> > and others
> > >> > combined with ctypes.
>
> > >> > Ivan
>
> > >> well, that seems extremely valuable but how can i implement those
> > >> functions with python?
>
> > > You know what I'm sorry, I will try to understand the ctypes lib before
> > > bothering you.
>
> > > thank you all!
>
> > No need to sorry. I have actually found very valuable information athttp://www.brunningonline.net/simon/blog/archives/000652.html
> > while googling to answer your question. I didn't know that such things
> > are really possible with Python/Win32! It'll help me a lot. Thank you!
>
> > Ivan
>
> If you guys are going to go digging into the PyWin32 modules, make
> sure you check this site out:
>
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/pywin32/PyWin3...
>
> It has the docs for the distro and a link to the user's group too. Bot
> have been very helpful to me.
>
> Mike

OK thanks guys I'm going try and if I will succeed I will tel you how
I did it


From paddy3118 at googlemail.com  Sun May 11 01:19:10 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:19:10 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <41c9f303-219e-4b4d-a1b6-ee998b406a39@c65g2000hsa.googlegroups.com>

On May 11, 3:19 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
>     #do something 10 times
>
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Hi John,
If you have an object that is both indexable and iterable, then
visiting every member by first generating an index then indexing the
object is un-pythonic. You should just iterate over the object.

Like most rules, things can get fuzzy around the edges: if you have n
objects to be visited each index at a time, then the more functional
approach would be to izip all the objects and iterate over the result.
Another way would be to iterate over the the enumeration of one object
and use the index created to index the other n-1 objects.

In all such situations you need to remember that things such as code
clarity, and speed, might make the final decision for you.


In the following examples then the first is what I would use, izip. If
I needed an index then I'd prefer the last, which combines izip and
enumerate:

PythonWin 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32.
Portions Copyright 1994-2006 Mark Hammond - see 'Help/About PythonWin'
for further copyright information.

 >>> obj1 = 'CSM'
 >>> obj2 = 'aue'
 >>> obj3 = 'tmn'
 >>> from itertools import izip
 >>> for x,y,z in izip(obj1, obj2, obj3):
 ... 	print x,y,z
 ...
 C a t
 S u m
 M e n
 >>> for i,x in enumerate(obj1):
 ... 	print x, obj2[i], obj3[i]
 ...
 C a t
 S u m
 M e n
 >>> for i in range(len(obj1)):
 ... 	print obj1[i], obj2[i], obj3[i]
 ...
 C a t
 S u m
 M e n
 >>> for i,(x,y,z) in enumerate(izip(obj1, obj2, obj3)):
 ... 	print i, x, y, z
 ...
 0 C a t
 1 S u m
 2 M e n
 >>>


- Paddy.


From kyrie at uh.cu  Wed May 28 14:09:31 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 28 May 2008 14:09:31 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
Message-ID: <200805281409.31644.kyrie@uh.cu>

On Wednesday 28 May 2008 09:22:53 am Dave Parker wrote:
> I think in a month or two, Flaming Thunder will be using catch/throw
> exception and error handling. ?So, for example:

Nice... Flaming Thunder sure evolves quickly. Too quickly to be considered 
a 'feature' of the language. Following your posts in this thread, I see that 
you 'plan to add soon' every cool feature that every other language seems to 
have.

That means that I won't have to test my program only against every major 
versions of Flaming Thunder... i will have to test it with every week's 
version. With no certainty whatsoever that today's program will work on 
tomorrow's FT.

Why don't you wait a bit, until Flaming Thunder is mature enough to be stable, 
before trying to advertise it to us? And in the meantime, some of us are 
going to keep trying to add all the features we've always wanted, to the next 
major version of Python.

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From grante at visi.com  Fri May  2 10:44:59 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 09:44:59 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
Message-ID: <mu2dnYjNde12tYbVnZ2dnUVZ_sHinZ2d@visi>

On 2008-05-02, Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> wrote:

>>I've never clearly understood why people want to use "#! /usr/bin/env
>>python", which is prone to finding a different Python from the one
>>installed by the operating system. I'd be interested to see what
>>responses are in favour of it, and what the reasoning is.
>
> Simple, some systems are not as peculiar as a lot of Linux boxes which
> chug everything into /usr/bin, which is OS territory

On many Linux distros, Python is pretty much part of the OS.
Since the early days of RedHat, Python has been part of the
base/minimum install since a lot of the "required" system
utilities were written in python.  In Redhat, the package
manger was originally written in Python, so Python had to be in
"OS territory".

> (as has been decreed long ago by hier(7)), but rather use
> /usr/local/bin (all BSD Unix and derivatives) or /opt or
> whatever convention a particular operating system has.

In the Linux world, /usr/local/bin and /opt are for stuff
installed by the user, not stuff that is an integral, required
part of the OS distribution.

-- 
Grant



From Dominique.Holzwarth at ch.delarue.com  Thu May  8 03:26:28 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Thu, 8 May 2008 08:26:28 +0100
Subject: Problems with os.walk
Message-ID: <5213E58D85BC414998FA553C701E386C0EDD1C81D9@SGBD012511.dlrmail.ad.delarue.com>

Hi everyone

The following code:

scriptPath = os.path.dirname(__file__)
(dirpath, dirnames, filenames) = os.walk(scriptPath)
print 'dirpath\n'
print dirpath
print 'dirnames\n'
pprint.pprint(dirnames)
print 'filenames\n'
pprint.pprint(filnames)

Fails on the os.walk call with the following error:

    (dirpath, dirnames, filenames) = os.walk(scriptPath)
ValueError: need more than 1 value to unpack

Any ideas what could be wrong?

Thx & greetings
Dominique

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From sturlamolden at yahoo.no  Wed May 21 13:29:23 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:29:23 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com> 
	<ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com> 
	<4833f2ef$0$3737$426a74cc@news.free.fr>
Message-ID: <64fb9443-5e52-4f55-9b83-2bd43d64b596@m36g2000hse.googlegroups.com>

On May 21, 12:01 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:

> > C has proven very difficult to optimize, particularly because pointer
> > aliasing prevents efficient register allocation.
>
> Does this compare to optimizing something like Python ? (serious
> question, but I think I already know part of the answer).

In Python different references can alias the same object. But the
objects for which this is important in C, is typically elementary
types like ints and floats. Pointer aliasing has the consequence that
the compiler often cannot choose to keep an int or a float in a
register inside a tight loop. This will often have serious
consequences for numerical computing. But these elementary types are
immutable in Python, so Python is actually somewhat immune to this.
This is one of several reasons why RPython sometimes can be "faster
than C".

But there are other much more important issues if you are to generate
efficient machine code from Python, e.g. getting rid of redundant
attribute lookups.



From rupole at hotmail.com  Wed May  7 09:08:32 2008
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 7 May 2008 09:08:32 -0400
Subject: Can't drag and drop onto .py in Windows XP?
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
Message-ID: <fvs9kt$hpn$1@ger.gmane.org>


Sizer wrote:
>I have several python utils that look at sys.argv to get a list of
> filenames to process and mangle the files in various ways. If I have a
> bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and
> bar.bat gets called with foo.avi as an argument, everyone's happy. But if 
> I
> have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a 
> big
> NO cursor and nothing happens.
>
> Now I can work around this by creating a _bar.bat and having the _bar.bat
> call bar.pyw with the filenames it was passed (this is obviously
> ridiculous). Or I can create a shortcut which has the target of
>   c:\python25\pythonw.exe c:\mybar\bar.pyw
> and that works, but makes telling people how to install my utilities on
> their computer a pain in the rear. It's just a little weird that I can't
> just drag and drop file names onto .pyw or .py files. Am I missing
> something here?
>
> Thanks for any help.

You can register a DropHandler for the Python file class.
Put this in a .reg file and merge it into the registry:

REGEDIT4

[HKEY_CLASSES_ROOT\Python.File\shellex\DropHandler]
@="{86C86720-42A0-1069-A2E8-08002B30309D}"


              Roger





From upton at virginia.edu  Wed May 21 15:38:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 15:38:19 -0400
Subject: best way to check if pid is dead?
In-Reply-To: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
Message-ID: <5504f9ac0805211238s77dfa919kbcfd16420fe98a3@mail.gmail.com>

On Wed, May 21, 2008 at 3:02 PM, bukzor <workitharder at gmail.com> wrote:
> Does anyone have a pythonic way to check if a process is dead, given
> the pid?
>
> This is the function I'm using is quite OS dependent. A good candidate
> might be "try: kill(pid)", since it throws an exception if the pid is
> dead, but that sends a signal which might interfere with the process.
>
> Thanks.
> --Buck
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I don't know if you would call this pythonic, but the way I do it in linux is:

import os
os.path.exists("/proc/%d"%(pid))

Or, more to the point, I'm usually checking to see if processes I
forked have finished, without just having to do a wait4 on them; in
the case you can do something like

procfile = open("/proc/%d/stat" %(pid))
procfile.readline().split[2]

You can do man proc to see what each of the possible letters means; I
look for Z to find that the process has exited but it's waiting for
its parent to do a wait4.

HTH
-dan


From sjmachin at lexicon.net  Fri May  9 23:46:37 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 03:46:37 GMT
Subject: regexp help
In-Reply-To: <eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<d7f9143b-70fe-4bad-b91f-7a05c3128737@n1g2000prb.googlegroups.com>
	<ef80a078-5bfa-4564-bdc1-075664bc3719@34g2000hsf.googlegroups.com>
	<4824fcec$1@news.mel.dft.com.au>
	<eeaaec6e-1fe2-4591-a88c-33326af0fa99@e39g2000hsf.googlegroups.com>
Message-ID: <48251a9a@news.mel.dft.com.au>

globalrev wrote:
>> The inner pair of () are not necessary.
> 
> yes they are?

You are correct. I was having a flashback to a dimly remembered previous 
incarnation during which I used regexp software in which something like 
& or \0 denoted the whole match (like MatchObject.group(0)) :-)


From gagsl-py2 at yahoo.com.ar  Sun May 25 14:51:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 15:51:01 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
	<mailman.1552.1211679461.12834.python-list@python.org>
	<Xns9AA9687021A04duncanbooth@127.0.0.1>
Message-ID: <op.ubp3zbhox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 06:15:45 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
>> En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth
>> <duncan.booth at invalid.invalid> escribi?:
>>>
>>> It might be worth considering an alternative approach here: a
>>> formatted exception includes the relevant source lines (where
>>> possible).
>>
>> Just to note that the standard cgitb module already does that, among
>> other things.
>>
> Anywhere Python prints a traceback already does that. The 'alternative
> approach' I was suggesting was the part you snipped, i.e. extracting the
> enclosing class name from the source.

Ah, sorry for the misunderstanding!

-- 
Gabriel Genellina



From kyosohma at gmail.com  Mon May 19 11:40:38 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 08:40:38 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>

On May 19, 10:18 am, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.
>
> Thanks,
> SPJ

I think it depends on how you're connecting to the routers.
Theoretically, you should be able to use Python's socket or ssh
modules to connect to them, send commands and capture the output.

Just experiment with one or two routers until you get it.

Mike


From bruno.desthuilliers at gmail.com  Fri May 16 17:47:02 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:47:02 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com> 
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>
Message-ID: <ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>

On 16 mai, 23:23, dave.g1... at gmail.com wrote:
> Thanks for the responses.  I'm well aware that the function can be
> passed in the parameters, passing in the functino as an arg defeats
> the purpose of what I'm going after.

Why so ?

> @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
> but a perfunctory glance looks like we're doing the close to the same
> thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
> can pass in other parameters to foo.

I may be wrong (if so please pardon my lack of intelligence and/or
provide a couple use case), but it looks like you're trying to
reinvent partial application.

from functools import partial
def foo(x, y):
  return x + y

pfoo = partial(foo, 2)
print pfoo(42)

Don't know if this helps...


From rossgk at gmail.com  Thu May 15 16:12:12 2008
From: rossgk at gmail.com (RossGK)
Date: Thu, 15 May 2008 13:12:12 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
Message-ID: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>

Just getting used to the PyDev environment in eclipse by playing with
a few simple programs. I'm also using wxPython GUI stuff.

 I've noticed though that simple print commands in my code cause a
"wxPython:stdout/stderr" popup window to display any print's I might
be dumping out, rather than going to the console in Eclipse.

Any suggestions of why this is?   Another code example I was looking
at (which does not include any wx GUI stuff) has print commands whose
result ends up in the Eclipse console, just to further confuse me.

Is this something that wxPython is imposing on the environment?

Thx.
Ross.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 08:19:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 14:19:16 +0200
Subject: Calling class method by name passed in variable
In-Reply-To: <slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <4836b62b$0$24427$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>>> Can someone suggest an efficient way of calling method whose name is
>>> passed in a variable?
>>>
>>  method = getattr(obj, 'method_name', None)
>>  if callable(method):
>>       method(args)
> 
> I think that that is needless LBYL...

 From experience, it isn't.


>    getattr(obj, 'method_name')(args)
> 
> Will produce some perfectly good exceptions

The problem is that you can't tell (without reading the exception's 
message and traceback etc) if the exception happened in you code or 
within the called method.



From daveparker at flamingthunder.com  Tue May 13 12:56:08 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:56:08 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
Message-ID: <8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>

> Who has conducted the research that supports that statement? And since when
> is ^ the better operator for "to the power of" that **? Because latex uses
> it? I need to see the elementary school students who use that...

All of the calculators and textbooks that elementary school students
use, use "^" for powers.  Just like Flaming Thunder does.  I haven't
seen "**" for powers since FORTRAN.

On May 13, 10:38?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > True. ?But in Python, you don't see statically-linked pure-syscall CGI
> > scripts being cross-compiled under Windows for ftp'ing up to a Linux
> > server. ?And you don't see the speed of pure assembly language
> > libraries. ?And I'll be willing to bet that Flaming Thunder will have
> > OO features similar to Python before Python has the features that
> > Flaming Thunder already does.
>
> Your bets don't count anything here. These things don't exist, so don't brag
> on them being superior.
>
> > For many people, being 5 to 10 times faster at numerical analysis and
> > CGI scripting is reason enough to pay $19 per year. ?But maybe for
> > other people, having slow, inefficient programs and websites is
> > acceptable.
>
> Quite a revealing statement I'd say. And unless you don't show any
> real-world site running on FT that needs things like sessions, cookies,
> database-connectivity, unicode and a ton more of stuff FT doesn't support
> out-of-the-box or through 3rd-party-libs, I wouldn't mention "the people"
> as well. So far, *all* that you've been showing on your site regarding CGI
> are toy-scripts. Nothing more.
>
> >> And what is really expensive is brain-cycles, not cpu-cycles.
>
> > Depends on whether you're the programmer, or the customer. ?I've found
> > that customers prefer products that are 5 to 10 times faster, instead
> > of products that were easy for the developer.
>
> This shows how much you don't know about customers, and their needs. A
> customer gives a s**t about 5-10 times faster sites. They care if it is
> *fast enough*, but beyond that they don't bother. But what *always* bothers
> them is development time & flexibility. Because that directly affects the
> price they pay.
>
> And if a average man-day costs $600 (which is not expensive), and the
> project is of average size of a couple of man-months - well, you care about
> mathematics, do the math yourself what that means that FT lacks anything
> but a simple CGI-interface.
>
> > And I disagree that Flaming Thunder requires more brain-cycles.
> > Because it's based on leveraging existing English and math fluency
> > (which was one of the original goals of Python, was it not?), I think
> > that Flaming Thunder requires fewer brain-cycles because fewer brains
> > cells have to be devoted to memorizing language peculiarities.
>
> It does require more, because it lacks all the libs and 3rdparty-libs. And
> because it lacks features such as OO and other stuff, it will be harder to
> write these as well as use them.
>
> Show me how to beat a quickstarted TurboGears/Django webproject. *Then* you
> can talk business here.
>
> > Perhaps. ?But if elementary school students can easily understand why
> > one programming language gives the answer 100 (Flaming Thunder):
>
> > ? Write 10^2.
>
> > but can't understand why another programming language gives the answer
> > 8 (Python):
>
> > ? Print 10^2
>
> > then I think the comparison moves beyond a matter of taste into the
> > realm of measurable ease-of-use.
>
> Who has conducted the research that supports that statement? And since when
> is ^ the better operator for "to the power of" that **? Because latex uses
> it? I need to see the elementary school students who use that...
>
> Even *if* that would be true, how does a perceived advantage in one field FT
> was explicitly created for show that it is the generally better one and
> understandable one for more diverse applications?
>
> Diez



From deets at nospam.web.de  Mon May 12 10:50:02 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 16:50:02 +0200
Subject: Removing option from optparse
In-Reply-To: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>
References: <a0558b62-d8d1-4c7b-afb8-c479ef1eca7f@y21g2000hsf.googlegroups.com>
Message-ID: <68r3p5F2t6nq8U1@mid.uni-berlin.de>

GustavoTabares at gmail.com schrieb:
> Hello,
> 
> I'm trying to figure out if the following is a bug or if I'm using the
> remove_option in the wrong way.
> 
> #!/usr/bin/env python
> import optparse
> parser = optparse.OptionParser()
> parser.add_option("--test", help="This is a test option")
> parser.remove_option('--test')
> print parser.parse_args()
> 
> this will output:
> (<Values at 0x6beb8: {'test': None}>, [])
> 
> If you execute the --help on the file above you will not see --test as
> expected. I'm curious as to why parse_args is still returning this as
> an option.

I'm guessing here - but it is *one* thing to disable an option for the 
user because of whatever condition, and another to remove the options 
default value that code could possibly rely on to work. So I'd say the 
behavior is sane.

Diez


From bignose+hates-spam at benfinney.id.au  Sat May 24 21:28:30 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:28:30 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
Message-ID: <87r6br9npd.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> Is it considered to be cheating if you make a test case which always
> fails with a "TODO: Make a proper test case" message?

I consider it so.

What I often do, though, is write a TODO comment in the unit test
suite:

    # TODO: test_frobnitz_produces_widget_for_znogplatz_input(self):

At which point I've got:

* A unit test suite that has the same number of tests.

* A comment that my editor will highlight, and that many tools are
  tuned to look for and flag for my attention (the "TODO:"
  convention).

* A description of what the test should be testing, as the name of the
  function that will implement the test. (This also forces me to think
  of exactly what it is I want to assert about the code's behaviour,
  by writing a test case name that embodies that assertion.)

* The beginnings fo the test case function itself, simply by removing
  the "# TODO: " part when I get around to that test case.

Then I get back to the work I was doing when that idea struck me,
knowing thaat it's recorded so I don't have to focus on it now.

> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

That depends, of course, on how hard they are to reproduce. But one
common technique is isolation via test doubles
<URL:http://xunitpatterns.com/Test%20Double.html>.

If you want to see how a specific unit of code behaves under certain
conditions, such as a disk failure, you're not interested in testing
the disk subsystem itself, only your code's behaviour. So you isolate
your code by having the unit test (often in a fixture) provide a "test
double" for the disk subsystem, and rig that double so that it will
predictably provide exactly the hard-to-get event that you what your
code to respond to correctly.

> A few examples off the top of my head:
> 
> * Code which checks for hardware defects (pentium floating point,
> memory or disk errors, etc).
> 
> * Code that checks that a file is less than 1 TB large (but you only
> have 320 GB harddrives in your testing environment).
> 
> * Code which checks if the machine was rebooted over a year ago.

All of these can, with the right design, be tested by providing a test
double in place of the subsystem that the code under test will
exercise, and making that test double provide exactly the response you
want to trigger the behaviour in your code.

> Also, there are places where mock objects can't be used that easily.
> 
> eg 1: A complicated function, which needs to check the consistency of
> it's local variables at various points.

That's a clear sign the function is too complicated. Break out the
"stages" in the function to separate functions, and unit test those so
you know they're behaving properly. Then, if you need to, you can
easily provide test doubles for those functions; or you may find you
don't need to once you know they're fully test covered.

> It *is* possible to unit test those consistency checks, but you may
> have to do a lot of re-organization to enable unit testing.

This results in more modular code with looser coupling (fewer
interdependencies between components). This is a good thing.

> In other cases it might not be appropriate to unit test, because it
> makes your tests brittle (as mentioned by another poster).
> 
> eg: You call function MyFunc with argument X, and expect to get result Y.
> 
> MyFunc calls __private_func1, and __private_func2.

If you've got name-mangled functions, that's already a bad code smell.
Not necessarily wrong, but that's the way to bet.

> You can check in your unit test that MyFunc returns result Y, but you
> shouldn't check __private_func1 and __private_func2 directly, even if
> they really should be tested (maybe they sometimes have unwanted side
> effects unrelated to MyFunc's return value).

Don't write functions with unwanted side effects. Or, if those side
effects are actually caused by other subsystems beyond your control,
test those functions with test doubles in place of the external
subsystems.

> eg: Resource usage.
> 
> How do you unit test how much memory, cpu, temporary disk space, etc
> a function uses?

This is beyond the scope of unit tests. You should be testing resource
usage by profiling the entire application, not in unit tests.

> eg: Platforms for which unit tests are hard to setup/run.
> 
>  - embedded programming. You would need to load your test harness into
> the device, and watch LED patterns or feedback over serial. Assuming
> it has enough memory and resources :-)
>  - mobile devices (probably the same issues as above)

Yes, it's unfortunate that some systems don't yet have good tools to
enable unit testing. Fix that, or pay others to fix it, because it's
in your best interests (and your customers's interests) to have unit
testing be as easy as feasible on all platforms that you target.

> eg: race conditions in multithreaded code: You can't unit test
> effectively for these.

Another good reason to avoid multithreaded code where possible. I find
that "it's really hard to deterministically figure out what's going
on" is reason enough to avoid it. If it's so hard to know the current
state of the system, it's therefore a poor choice, because I have no
good way to report to my customer how close I am to finishing the
implementation.

Others may have successfully achieved unit tests for conditions that
only arise in multithreaded code, but that's outside my experience.

-- 
 \     "How many people here have telekenetic powers? Raise my hand."  |
  `\                                                    -- Emo Philips |
_o__)                                                                  |
Ben Finney


From sebastian.noack at googlemail.com  Tue May 27 01:43:53 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Mon, 26 May 2008 22:43:53 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
	<mailman.1631.1211847451.12834.python-list@python.org>
Message-ID: <35552ee8-4c87-4694-b783-aa4315f3ce18@m73g2000hsh.googlegroups.com>

On May 27, 2:17 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> It's not a bug, you must extract the StringIO contents *after* closing
> tar_file, else you won't get the last blocks pending to be written.

I looked at tarfile's source code last night after I wrote this
message and figured it out. But the problem is that TarFile's close
method closes the underlying file object after the last block is
written and when you close StringIO you can not get its content
anymore. Wtf does it close the underlying file? There is absolute no
reason for doing this. Are you still sure this isn't a bug?

Regards
Sebastian Noack


From arnodel at googlemail.com  Fri May 16 10:09:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 07:09:29 -0700 (PDT)
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
Message-ID: <eac249db-9b2c-4376-ba16-8bc92bac072d@p25g2000hsf.googlegroups.com>



rocco.ro... at gmail.com wrote:
> Is there any function which will return a variable by passing to it
> the string containing the variable's name? Something like this for
> instance:
>
> foo = some_function("foo")
>
> or perhaps it's a dictionary. I don't know, but I would really like to
> find out how it can be done. I guess it is achievable.
>
> Thank you.

There are the globals() and locals() builtins.

>>> a = 42
>>> globals()['a']
42
>>>

--
Arnaud


From hdante at gmail.com  Mon May 19 11:53:11 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 08:53:11 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
Message-ID: <a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>

On May 19, 6:52?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Henrique Dante de Almeida a ?crit :
>
> > On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
> >> Hello.
>
> (snip)
> >> However, it is usually said that Python is not a compiled but
> >> interpreted programming language ?I mean, it is not like C, in that
> >> sense.
>
> (snip)
> > ?I guess that python is not a good language for that.
> (snip)
> > ?My opinion: choose compiled or byte compiled languages.
>
> Slightly OT (ie : not talking about computation-heavy alorgithm being
> better implemented in C then wrapped in Python - this seems quite
> obvious) but just a couple facts:
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.
>
> 2/ actually, all known Python implementations compile to byte-code.

 Yes, I was actually referring to statically typed JIT-compiled
languages. Sorry about that, blame the beers that entered my digestive
system that night. :-P


From robert.kern at gmail.com  Fri May 16 18:25:00 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 16 May 2008 17:25:00 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
Message-ID: <g0l1jt$vc$1@ger.gmane.org>

Marlin Rowley wrote:
> All:
>  
> I'm getting different floating point values when I use numpy vs. unpack().
>  
> frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> buffer = unpack("!f", byte)
>  
> frgba[0] != buffer[0]
>  
> why?  This is forcing me use the unpack() function since it's giving me 
> the correct values.  What am I doing wrong?

Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most 
likely, you are on a little-endian platform. All of the dtypes in numpy default 
to the native-endianness unless specified. If you want to read big-endian data 
using numpy, do this:

   frgba = numpy.frombuffer(<string of bytes>, dtype='>f')

If you have any more problems with numpy, please join us on the numpy mailing 
list. When reporting problems, please try to provide a small but complete 
snippet of self-contained code, the output that you got, and explain the output 
that you expected to get. Thank you.

   http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From hniksic at xemacs.org  Fri May 16 18:56:20 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Sat, 17 May 2008 00:56:20 +0200
Subject: Instance of class "object"
In-Reply-To: =?utf-8?Q?<cdb837ea=308=305=316=303=309g6ea5=31644nf23?=
	=?utf-8?Q?37bcddc34eb2=31@mail=2Egmail=2Ecom>=28=22=E7=94=9C=E7=93=9C=22=27?=
	=?utf-8?Q?smessage_of_=22Fri\=2C_=316_May_2=30=308_=318\=3A=309\=3A29?=
	=?utf-8?Q?=2B=308=30=30=22=29?=
References: <mailman.1214.1210927611.12834.python-list@python.org><8763tea9s
	d.fsf@mulj.homelinux.net><cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>
Message-ID: <873aoh7t9n.fsf@mulj.homelinux.net>

"??" <littlesweetmelon at gmail.com> writes:

>> # an efficient 'Pair' class holding two objects
>> class Pair(object):
>>    __slots__ = 'first', 'second'
>>
>> Instances of Pair take up even less room that 2-element tuples
>> because they don't carry the size information in the object.
>>
>> Now, if the object class carried a dict with it, it would be
>> impossible to create a class like 'Pair'.
>>
> Really interesting. When the tuple ('first', 'second') is assigning
> to __slot__, a special operation is done which makes __slot__
> pointing to a magic structure rather than a normal tuple. Am I
> right?

It's more like this: when the 'Pair' class is created, the class
creation mechanism notices that the class contain a __slots__ member.
It then uses that member as a specification for the layout of
instances of the 'Pair' type.  In this case, instead of a regular dict
(which can hold any number of attributes), Pair instances hold exactly
two attributes, as if[1] it had been declared as:

struct Pair {
  PyObject_HEAD       // type and refcnt, needed for Python
  PyObject *first;    // holds pair.first
  PyObject *second;   // holds pair.second
};

I'm not sure what you mean by "pointing to a magic structure rather
than a normal tuple", but without __slots__, the layout would be
roughly equivalent to:

struct Pair {
  PyObject_HEAD       // type and refcnt, needed for Python
  PyObject *dict;     // holds all pair attributes
};


[1]
I'm intentionally simplifying here, for example omitting weakrefs.


From duncan.booth at invalid.invalid  Mon May  5 06:24:00 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 May 2008 10:24:00 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>
Message-ID: <Xns9A9573FC740FBduncanbooth@127.0.0.1>

Szabolcs <szhorvat at gmail.com> wrote:

> On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> Gabriel Genellina wrote:
>>
>> > Python doesn't require __add__ to be associative, so this should
>> > not be 
> used as a general sum replacement.
>>
>> It does not _require_ this, but using an __add__ that is not
>> commutative and associative, or has side effects, would qualify as a
>> serious misuse, anyway.
> 
> Sorry, I meant associative only, not commutative.
> 
Unfortunately an __add__ which is not associative is actually perfectly 
reasonable. For example you could have a Tree class where adding two trees 
returns a new tree so (a+b)+c gives you:

    .
   / \
   .  c
  / \
  a  b

but a+(b+c) gives:

    .
   / \
   a  .
     / \
     b  c
   


From larry.bates at websafe.com`  Thu May 15 15:03:22 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 15 May 2008 14:03:22 -0500
Subject: Problem creating a shorcut
In-Reply-To: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>

Mike Driscoll wrote:
> Hi,
> 
> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
> 
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:
> 
> <code>
> 
> import win32com.client
> import winshell
> 
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
> 
> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
> Firefox'
> shortcut.save()
> 
> </code>
> 
> This creates the following target path (which doesn't work):
> 
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
> 
> If I leave the website off, it works. If I leave the path to Firefox
> out, it works too. Is there another method I can use other than
> creating the shortcut by hand and using the shutil module?
> 
> Thank you for any ideas.
> 
> Mike

Either you copied wrong or the problem is:

"C:\"C:\Program Files...


Note the C:\ is specified twice in the string.  I think it should read:

 > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
 > \www.myCompanyWebsite.com\auth\preauth.php"

-Larry


From arnodel at googlemail.com  Thu May  8 13:45:48 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 08 May 2008 18:45:48 +0100
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de> <fvv0cg$rsh$1@aioe.org>
Message-ID: <m24p98665v.fsf@googlemail.com>

pistacchio <pistacchio at gmail.com> writes:

>  ocalm forces you to di OOP

Ocaml *allows* you to do OOP. It's very much an optional feature of
the language, just like for Python.

-- 
Arnaud


From gherron at islandtraining.com  Fri May 23 03:36:20 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 23 May 2008 00:36:20 -0700
Subject: error using all()/numpy [TypeError: cannot perform reduce with
	flexible type]
In-Reply-To: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <483673F4.5090104@islandtraining.com>

Marc Oldenhof wrote:
> Hello all,
>
> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
>
> [start Python]
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>
>   
>>>> a=['1','2','3']
>>>> all(a)
>>>>         
> True
>   
>>>> from numpy import *
>>>> all(a)
>>>>         
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
>     return _wrapit(a, 'all', axis, out)
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
>     result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
>
> [end of example]
>
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
>
> Is there another way around this error?
>   

Yes, there are several solutions, but before that I'll say that "from 
... import *" is frowned upon for just this reason.   You have no 
control (and often no idea) what * ends up importing, and if any of 
those names overwrite an existing name (as you've found here), you may 
not notice.    (It's not quite fair to say "Python calls numpy's "all".  
*You* call it after you chose to replace Python's "all" with numpy's "all".)

Solutions:



Save Python's "all" first under another name:
    original_all = all
    from numpy import all
Now you can call all(...) or original_all(...).



The built-in (as they are called) are always available through __builtins__:
    from numpy import *
    all(...)  # is numpy's all
    __builtins__.all(...)  # Is the original all




Don't import *, but rather import only those things you need.
    from numpy import array, dot, float32, int32, ...
and if you need numpy's all
    from numpy import all as numpy_all


Gary Herron




> Marc
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gandalf at shopzeus.com  Tue May 20 10:22:46 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 20 May 2008 16:22:46 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <4831c608$0$14361$e4fe514c@news.xs4all.nl>
References: <mailman.1216.1210933005.12834.python-list@python.org>	<slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>	<mailman.1335.1211187990.12834.python-list@python.org>
	<4831c608$0$14361$e4fe514c@news.xs4all.nl>
Message-ID: <4832DEB6.1010909@shopzeus.com>


>
> - use simple file copying from a mounted network drive
Untrustable clients should not mount out anything from my server. (Also, 
it is not a protocol. I need to communicate with a real program, not 
just copying files.)
> - use http (web server)
I mentioned this before - don't know how to keep-alive with 
simplehttpserver. Similar solutions e.g. Apache + mod_python are too 
heavy weight. Too many dependencies etc.
> - use ftp
> - use scp
> - use rsync
>
> Why wouldn't one of these work for you? Did I miss something in your 
> original requirements?
Yes. I also need business logic on the server. Not just copying file. It 
happens that some of the messages will contain images.


Thank you for all your efforts. I think I'll go with TCPServer + xdrlib.


Laszlo





From goldnery at gmail.com  Fri May 23 13:02:47 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 10:02:47 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com>
Message-ID: <deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com>

On May 23, 6:25 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 10:45 am, Gandalf <goldn... at gmail.com> wrote:
>
> > How can i bind function that handle the mouse clicking  window X event
> > or clicking alt+F4
>
> > thanks
>
> You really need to learn to ask good questions. Unless people dive
> into your previous posts, they won't know what Python GUI toolkit you
> are using, which version of said toolkit, which Python or which OS.
>
> Here's a good place to read about events in general:
>
> http://wiki.wxpython.org/EventPropagation
>
> If you use Google, you can look for the close event, which gives you
> this:
>
> http://www.wxpython.org/docs/api/wx.CloseEvent-class.html
>
> So you'll want to bind your frame to EVT_CLOSE. You can disable the
> "X" in your frame's window by using non-standard style parameters.
>
> Mike

OK you right. I use WX on windows XP.
I didn't understood how to use this wx.CloseEvent function.

i really struggle with my poor english to understand this language, so
your help is crucial for my progress and i appreciate it

Thanks


From marlin_rowley at hotmail.com  Thu May 15 12:03:09 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:03:09 -0500
Subject: How do I use the unpack function?
Message-ID: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>


All:

I've got a script that runs really slow because I'm reading from a stream a byte at a time:

// TERRIBLE
for y in range( height ):
        for color in range(4):
            for x in range( width ):
                    pixelComponent = fileIO.read(4)
   
            buffer = unpack("!f",pixelComponent)  << unpacks ONE
float, but we now can do something with that pixel component.


I can speed this up dramatically if I did this:

// MUCH FASTER
for y in range( height ):
    for color in range(4):
   
   pixelComponent = fileIO.read(4*width)
<<<<<<<<<  GET a LOT more data from the
stream into memory FIRST!!
        for x in range( width ):
           buffer = unpack( ?????? ) <<<< how do I get each float from the pixelComponent???


-M
_________________________________________________________________
With Windows Live for mobile, your contacts travel with you.
http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008
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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:45:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:45:29 +0200
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <48367601$0$20550$426a74cc@news.free.fr>

George Maggessy a ?crit :
> Hi Gurus,
> 
> I'm a Java developer and I'm trying to shift my mindset to start
> programming python.

Welcome onboard then.

> So, my first exercise is to build a website.
> However I'm always falling back into MVC pattern.

And ? Is there anything wrong with web-style MVC ?

> I know it's a
> standard, but the implementation language affects the use of design
> patter. So, here goes my question. Is that OK if I follow this? Should
> I create DAOs, View Objects, Controllers and etc? Is there any sort of
> best practice / standard to Python?

http://pylonshq.com/
http://www.djangoproject.com/
http://webpy.org/


From Avowkind at gmail.com  Tue May 27 18:04:18 2008
From: Avowkind at gmail.com (Avowkind)
Date: Tue, 27 May 2008 15:04:18 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>

On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
> (might not be the right forum for this but...)
>
> what is the definition of a highlevel-language?
>
> well there isnt one specifically and wikipedia and the like gives just
> a very general description obv you can say it abstracts away lowlever
> operations.
>
> yes but how?
>
> a function like map takes a function and applies it to a list for
> example.
> this abstracts away a common procedure like iterate through a list and
> for every position do a computation.
> so it is a higherorderfunction. is this how higher-level-languages are
> built?
>
> so are they fundamentally differently built or is it just a lot of
> lowlevel operations built on top of each other?
>
> haskell is considered a very highlevellanguage but can you do
> systemsprogramming with it(yes maybe it is very unpractical i dont
> know but can you)?
>
> is lambda calculus a more abstract and efficient way of modeling a
> computer? meaning you start at a higher level of abstraction and can
> work up to even higher even faster?
>
> how did lispmachines work? was the basic system programmed in LISP?


A lot of the previous comments have been about levels of abstraction
of the programming langauge - which may be the answer you want.
Another way of looking at it is that we want to be able to move from
the language of the solution domain - e.g. computers, bits and bytes
to the language of the problem domain.

When we think about 'level' we don't just want to look at how basic
statements work. we also need to think about whether the language is
capable of simply and clearly expressing the problem.

If your problem domain is mathematics then mathcad and its ilk are
near perfect high level programming languages as the programs look
just like the problems.

if your problem domain is controlling a water works then you may tend
to write your problem like this:

if the water level is over 10 metres then start pump
if the water level is below 5 metres then stop pump

which in python might turn out to be

if water_level > 10:
    pump.start()
if water_level < 5:
    pump.stop()

which is fairly close.
of course with the addition of some brackets C++ could be this clear
too. The key though is the abstraction given by the pump class and
implicitly by object oriented design.


In this pattern Form designers, visual web page layout tools and their
ilk are very high level - but only if your problem is that you need to
design a lot of business forms or web pages.  Some problems are best
described visually, some in text, some in mathematics.

Andrew.


From bignose+hates-spam at benfinney.id.au  Thu May 15 05:57:32 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 19:57:32 +1000
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
	<20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>
	<mailman.1141.1210823723.12834.python-list@python.org>
Message-ID: <87abiryjn7.fsf@benfinney.id.au>

"Terry Reedy" <tjreedy at udel.edu> writes:

> "John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
> news:20080514220126.e13d7cf1.johnjsal at NOSPAMgmail.com...
> | On Wed, 14 May 2008 12:58:12 -0400
> | "Terry Reedy" <tjreedy at udel.edu> wrote:
> |
> | > gmane.comp.python.general
> |
> | So that's the same as c.l.p.?
> 
> It is the same as python-list, which happens to be the same as c.l.p..

Which, to be clear, is a special case: the fact that the mailing list
'python-list' and the newsgroup 'comp.lang.python' interchange
messages, and are effectively the same forum, has nothing to do with
Gmane. That situation predates, and is unaffected by, the introduction
of Gmane.

-- 
 \        ?Good morning, Pooh Bear,? said Eeyore gloomily. ?If it is a |
  `\          good morning,? he said. ?Which I doubt,? said he. ?A. A. |
_o__)                                         Milne, _Winnie-the-Pooh_ |
Ben Finney


From grante at visi.com  Tue May 20 13:24:43 2008
From: grante at visi.com (Grant Edwards)
Date: Tue, 20 May 2008 12:24:43 -0500
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
	<g0u3c9$1fec$3@news.mtu.ru>
Message-ID: <BqadnXADgL7GlK7VnZ2dnUVZ_gednZ2d@posted.visi>

On 2008-05-20, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> On Mon, 19 May 2008 11:07:06 -0700, Vicent Giner wrote:
> [...]
>> 
>> By the way, is it possible (and easy) to call a C function from a Python
>> program??
>
> Yes.
>
> http://groups.google.com/group/comp.lang.python/msg/9d47913a265c348a

Even easier:

http://docs.python.org/lib/module-ctypes.html

-- 
Grant Edwards                   grante             Yow! I'd like some JUNK
                                  at               FOOD ... and then I want to
                               visi.com            be ALONE --


From hat at se-162.se.wtb.tue.nl  Wed May 21 11:13:58 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 21 May 2008 17:13:58 +0200
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
Message-ID: <slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>

On 2008-05-21, tdahsu at gmail.com <tdahsu at gmail.com> wrote:
> I'd appreciate any help.  I've got a list of files in a directory, and
> I'd like to iterate through that list and process each one.  Rather
> than do that serially, I was thinking I should start five threads and
> process five files at a time.
>
> Is this a good idea?  I picked the number five at random... I was

Depends what you are doing.
If you are mainly reading/writing files, there is not much to gain, since 1
process will already push the disk IO system to its limit. If you do a lot of
processing, then more threads than the number of processors is not much use. If
you have more 'burtsy' behavior (first do lot of reading, then lot of
processing, then again reading, etc), then the system may be able to do some
scheduling and keep both the processors and the file system busy.

I cannot really give you advice on threading, I have never done that. You may
want to consider an alternative, namely multi-tasking at OS level. If you can
easily split the files over a number of OS processes (written in Python), you
can make the Python program really simple, and let the OS handle the
task-switching between the programs.

Sincerely,
Albert


From ewertman at gmail.com  Wed May 21 12:40:27 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 21 May 2008 12:40:27 -0400
Subject: time module question - time zones
In-Reply-To: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>
References: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>
Message-ID: <92da89760805210940vc99afetc1c30d04d4cd9b24@mail.gmail.com>

Sorry, my time zone is +4, not minus 4, which means that something
else is causing my source data to be in the future.  I still do need
to understand where the time routines determine the time zone offset,
so I can be sure I'm passing around the neutral value.

Thanks!


On Wed, May 21, 2008 at 12:23 PM, Eric Wertman <ewertman at gmail.com> wrote:
> I tend to deal with dates a lot in different formats and places...
> typically I'll convert them to a time tuple with strptime(), and pass
> them around like that before I need to write them back out.
>
> One set of time/dates I'm getting are in UTC, but the string doesn't
> say that specifically.  So I do this..  I had expected the outcome to
> be offset properly (I'm EST5EDT).  But I'm obviously missing
> something:
>
> #!/usr/bin/env python
>
> import time
>
> utc_str = '2008-05-10 03:05:00 UTC'
>
> d = time.strptime(utc_str,'%Y-%m-%d %H:%M:%S %Z')
> t = time.mktime(d)
>
> print d
> print time.gmtime(t)
> print time.localtime(t)
>
> output :
>
> (2008, 5, 10, 3, 5, 0, 5, 131, 0)
> (2008, 5, 10, 8, 5, 0, 5, 131, 0)
> (2008, 5, 10, 4, 5, 0, 5, 131, 1)
>
>
> I believe that I should be getting (2008, 5, 9, 23, 5, 0, 5, 130, 1)
> out of one of those, since the original 3:05am time was UTC, and my TZ
> is currently -4.  Does that make sense?  I didn't even think I needed
> to do any business with time.localtime() and time.gmtime().  I
> expected  time.strftime() to return the locale appropriate time, but
> it didn't.
>
> TIA
>
> Eric
>


From gagsl-py2 at yahoo.com.ar  Tue May 20 18:29:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 19:29:04 -0300
Subject: regarding process preemption in linux
References: <67eb1c790805192118l646fd5c4l681b196ade76b5d2@mail.gmail.com>
Message-ID: <op.ubg4qqbfx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 01:18:29 -0300, PARIMALA KALAVALA  
<parimala.kalavala at gmail.com> escribi?:

>      I am presently working on linux.
> I wanted to know how to view the preemption of one process by another
> process. If we give TOP command we are not able to visualize it or do we
> need to write any different code to see it or is it possible to see it in
> the proc file system.

I suggest you ask in a linux group. There is nothing Python specific in  
this question.

-- 
Gabriel Genellina



From michele.simionato at gmail.com  Tue May 13 23:57:29 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 13 May 2008 20:57:29 -0700 (PDT)
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <bc18d6b6-97f1-4dff-a9a8-181abc861de6@f63g2000hsf.googlegroups.com>

On May 13, 5:28 pm, Paul Miller <neokos... at gmail.com> wrote:
> Does anyone know of any (preferably largish) examples of literate
> programs written using Python?  Alternatively, does anyone know of any
> literate programming tools which support Python well?  (I am aware of
> Leo and I've been to literateprogramming.com, but any additional
> pointers would be much appreciated!)
>
> Thanks,
>
> Paul

You may be interested in this:
http://stacktrace.it/articoli/2008/01/geek-publishing/

(you may want to use the Google Translator, unless you know Italian).


From python at bc90021.net  Sun May 11 14:42:21 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 18:42:21 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
Message-ID: <h6HVj.32508$KJ1.28377@newsfe19.lga>

> It's difficult to know what's wrong with the code you posted because:
> 
> * it is not self-contained: otherFile, fileName, pattern are names
>   which you do not define;
> 
> * the IOError you reported earlier can't arise as a result of running
>   this code.
> 
> * you claim it works unless you put it in a subclass of
>   threading.Thread.  Why don't you post this instead, and show us the
>   traceback?
> 
> HTH
> 
> FWIW, my crystal ball (whose predictions I don't usually report!) tells
> me the same as Garry Herron's.

Here's the thread class:

#single file is the file we're working on, whose name is passed into the class and which does exist
#matrix is a list of lists that contains info about the files - for this example, [c][0] contains a string, [c][2] contains true or false, and [c][3] contains a pattern to match
#tfValue is another true or false value


class FileProcThread(threading.Thread):
	def __init__(self, singleFile, matrix, tfValue):
        	self.singleFile = singleFile
        	self.matrix = matrix
        	self.tfValue = tfValue
        	threading.Thread.__init__(self)
   	def run(self):
        	(dirName, fileName) = os.path.split(self.singleFile)
        	f = open(self.singleFile).readlines()
        	copying = False
        	for i in range(len(f)):
            		for c in range (len(self.matrix)):
                		if (re.search(self.matrix[c][3], f[i])):
                    			if (self.matrix[c][2] == True):
                        			copying = True
                        			if os.name == "posix":
                            				if (self.tfValue == False):
								tempfileName = "\"proctemp/" + self.matrix[c][0] + "_tmp_" + fileName + 
".txt\""
							else:
                                				tempfileName = "\"proctemp/" + self.matrix[c][0] + "_other.txt\""
                        			else:
                            				if (self.tfValue == False):
								tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_tmp_" + fileName + ".txt\""
                            				else:
								tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_other.txt\""
                    			else:
						copying = False
                		if (re.search(self.matrix[c][4], f[i])):
					copying = False
			if (copying):
                		print "We're in copying, and tempfileName is: %s...\n" % tempfileName
				#The above line correctly prints the temporary file name every time!  The directory exists, too!
		                g = open(tempfileName, 'a')  #This does not work.  Notice I do NOT have quotes around tempfileName, as I said.
		                g.write(f[i])
                		g.close()

Like I said, this works FINE outside the thread class.  I hope that the formatting comes through...


From exarkun at divmod.com  Mon May 12 11:54:47 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 11:54:47 -0400
Subject: Socket and cycle problem
In-Reply-To: <67c1d643-5445-46c8-b00f-20238badd398@56g2000hsm.googlegroups.com>
Message-ID: <20080512155447.6859.1735358497.divmod.quotient.62519@ohm>

On Mon, 12 May 2008 08:34:07 -0700 (PDT), petr.poupa at gmail.com wrote:
>Hello,
>I am beginner but so I need help. I have small script for receive data
>from port 3883, but it print only once.
>
>import socket
>
>HOST = 'localhost'
>PORT = 3883
>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>s.connect((HOST, PORT))
>data = s.recv(2048)
>s.close()
>print 'receive data from server:', `data`
>
>So I try to write cycle to this script, like this:
>
>import socket
>
>HOST = 'localhost'
>PORT = 3883
>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>while 1:
>    s.connect((HOST, PORT))
>    data = s.recv(2048)
>    s.close()
>    print 'receive data from server:', `data`
>
>But Python reporting:
>
>Traceback (most recent call last):
>  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
><module>
>    s.connect((HOST, PORT))
>  File "<string>", line 1, in connect
>  File "C:\Python25\lib\socket.py", line 141, in _dummy
>    raise error(EBADF, 'Bad file descriptor')
>error: (9, 'Bad file descriptor')
>
>Where is the mistake? I dont know.

You cannot reconnect a socket.  You need to create a new one for each
connection.  It's also almost certainly the case that the way you are
receiving data is incorrect.  There is no guarantee that you will get
2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
the bytes written to the socket by the peer will be returned by such
a call.  Instead, you need a framing protocol to determine when all
data has been received.  For example, you might length prefix the
data, or you might insert a delimiter (or a terminator) at the end.  Or
if there is exactly one message to receive, then you should just read
until the recv call returns '', indicating EOF.

Jean-Paul


From florencio.cano at gmail.com  Mon May 26 14:18:48 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Mon, 26 May 2008 20:18:48 +0200
Subject: Using Python to unit test C code
Message-ID: <c496e0a70805261118g16c1e7b7u71a7dd78408d2f43@mail.gmail.com>

Hi!
I would like to hear any information about how to unit test C code using Python.
Thanks!


From miller.paul.w at gmail.com  Mon May 26 01:02:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 22:02:39 -0700 (PDT)
Subject: Performance of Python builtins
References: <d7549dfd-6770-4924-8f0c-1746642bd8a4@k37g2000hsf.googlegroups.com>
	<dad8a839-1311-4aa4-af30-959a502f399c@2g2000hsn.googlegroups.com>
Message-ID: <e521d29d-761a-4a52-af52-b28e830126c7@m45g2000hsb.googlegroups.com>

On May 25, 11:05?pm, Benjamin <musiccomposit... at gmail.com> wrote:

> http://wiki.python.org/moin/TimeComplexityis a start.

Awesome.  That's pretty much what I was after!


From tonal at promsoft.ru  Wed May  7 03:07:35 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Wed, 07 May 2008 14:07:35 +0700
Subject: strftime() argument 1 must be str, not unicode
Message-ID: <48215537.100@promsoft.ru>

Subj is bag?

Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from datetime import datetime
 >>> datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
'2008_05_07 12_30_22.csv'
 >>> datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: strftime() argument 1 must be str, not unicode


From bbxx789_05ss at yahoo.com  Sun May 11 16:08:26 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 13:08:26 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
	<eb73ea38-9c7b-4e0f-99ca-e6b796004c1b@m36g2000hse.googlegroups.com>
Message-ID: <4ab8c284-7e07-4666-b2f5-123c52f02749@t54g2000hsg.googlegroups.com>

On May 11, 2:01?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 11, 1:28?pm, bc90021 <pyt... at bc90021.net> wrote:
>
>
>
> > > ...and the exact error message was?
>
> > > Here is a tip: if you want people to help you, then you have to help
> > > them to help you. ?Personally, I wouldn't respond to anymore of your
> > > questions because you seem incapable of posting the information that was
> > > requested.
>
> > So far, the people who have answered this post have gone on the
> > assumption that I'm stupid. ?I'm not. ?I took perfectly working code,
> > cut it from one class, and put it in another. ?It stopped working in the
> > second class. ?I've spent days on this and trust me, given what I've
> > experienced of the Python community so far, if I didn't have to ask, I
> > wouldn't.
>
> > (I really must say that so far the help I am getting in the Python
> > community is a big let down. ?Whether it's on IRC or here, everyone has
> > an arrogance that I don't find anywhere else in the open source
> > community, and it seriously makes me question the choice of language that
> > I've made.)
>
> > The error message was at the top of the thread (am I incapable of posting
> > it, or are you incapable of following a thread?), but here it is again:
>
> > IOError: [Errno 2] no such file u'tempfileName'
>
> Well, it appears to me that this error message is different than the
> one in your first post. ?But maybe I'm on LSD right now and things
> will be appear differently tomorrow.
>
> In addition, I've never seen a python error message that doesn't
> include the traceback, which you were asked to post, but apparently
> are still incapbable of doing. ?Also, any line numbers in the error
> message should be marked in your code with comments. ?That will help
> other people help you, remember?

In addition, posting the exact output from this:

>print "We're in copying, and tempfileName is: %s...\n" % tempfileName
> #The above line correctly prints the temporary file name every time!
> The directory exists, too!

would be helpful.

In addition, reducing your code to a simple 10 line example that
produces the same problem and that anyone can run would be helpful.
You might find that making the effort to produce a simple 10 line
example that mimics the problem, will actually result in your solving
the problem yourself.




From vadim.pestovnikov at gmail.com  Thu May  1 10:34:35 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:34:35 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
Message-ID: <675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>

On May 1, 10:30 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> > referenced symbol not found
>
> You need to link _psycopg.so with the math library, -lm.
>
> Regards,
> Martin

Martin, could you please tell me how to do this, I am pretty new in
Solaris.


From hyugaricdeau at gmail.com  Fri May  9 10:55:10 2008
From: hyugaricdeau at gmail.com (Hyuga)
Date: Fri, 9 May 2008 07:55:10 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <9058e146-1d86-46cb-befc-7b40f92e9511@k37g2000hsf.googlegroups.com>

On May 9, 5:10 am, dannywebs... at googlemail.com wrote:
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo').  I need to grab the previous
> iteration if this condition is met.  I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

Why is that so terrible?
previous = None
for key in mydict:
    if key.starswith('foo') and previous is not None:
        # ...do stuff...
    previous = key

Doesn't seem too ugly to me.

> Is there a mechanism whereby I can just index the dict value
> subscripts like in an array? I could just rewind by 1 if so.

You can't rely on the keys in a dictionary being in any specific
order.  But if you want a list of the keys you can just call
mydict.keys() which will give a copy of the dictionary's keys in a
list.  Then you can iterate that and use it however you would use any
other list.  Note that it's a copy though.  It might help if you
better explained exactly what you need to do.


From usenet1 at anton.e4ward.com  Sun May  4 12:32:27 2008
From: usenet1 at anton.e4ward.com (Anton81)
Date: Sun, 04 May 2008 18:32:27 +0200
Subject: Weird import problem
Message-ID: <fvkoer$2g7h$1@gwdu112.gwdg.de>

I have a directory structure like

NS/dir1/file1.py
NS/dir2/file2.py

if in the python shell I type

import NS.dir1.file1

it works, however typing

import NS.dir2.file2

fails with

ImportError: No module named dir2.file2

Any ideas what could go wrong?
Directory permissions seem to be OK.



From exarkun at divmod.com  Wed May  7 11:21:10 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 7 May 2008 11:21:10 -0400
Subject: listening on TCP port
In-Reply-To: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>
Message-ID: <20080507152110.6859.130552924.divmod.quotient.60093@ohm>

On Wed, 7 May 2008 08:03:35 -0700 (PDT), petr.poupa at gmail.com wrote:
>Hello,
>is there anybody who has experience with listening on TCP port with
>python? I am looking for anything codes, tutorials,... .
>Thanks for any information

Take a look at

 http://twistedmatrix.com/projects/core/documentation/howto/servers.html

which gives a brief overview of writing TCP servers with Twisted.

Jean-Paul


From castironpi at gmail.com  Sat May 17 11:16:41 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 08:16:41 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<PWmXj.46797$3v1.36691@bignews3.bellsouth.net>
	<72d09350-ba1b-4af4-8fc5-190b6888bbb6@y21g2000hsf.googlegroups.com>
Message-ID: <df503fcb-6ed2-4792-a7be-4a93b570e07f@j22g2000hsf.googlegroups.com>

On May 17, 3:52?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 4:23?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
> wrote:
>
>
>
>
>
> > globalrev wrote:
> > > pickle.dumps(mg)
> > > pickle.load(mg)
>
> > > 'dict' object has no attribute 'readline'
> > > dumps load(well i dont know but i get no complaint but running load
> > > generates that error)
>
> > The 'loads' and 'dumps' methods use strings:
>
> > ?>>> import pickle
> > ?>>> d = {"this": 42, "that": 101, "other": 17}
> > ?>>> s = pickle.dumps(d)
> > ?>>> s
> > "(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
> > ?>>> pickle.loads(s)
> > {'this': 42, 'other': 17, 'that': 101}
>
> > If you want to store to / restore from file, use 'dump' and 'load':
>
> > # write to file 'out'...
> > ?>>> f = open("out")
> > ?>>> f = open("out", "wb")
> > ?>>> pickle.dump(d, f)
> > ?>>> f.close()
>
> > # restore it later
> > ?>>> g = open("out", "rb")
> > ?>>> e = pickle.load(g)
> > ?>>> g.close()
> > ?>>> e
> > {'this': 42, 'other': 17, 'that': 101}
>
> > Also seehttp://docs.python.org/lib/pickle-example.html.
>
> > Hope this helps!
>
> > --Hans
>
> I want to compare that cleanliness with other languages to compare
> formats.
>
> Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
> pickle.load( 'out', 'rb' )?- Hide quoted text -
>
> - Show quoted text -

This is a check-in on live-time writing.  pickle.load didn't take two
parameters.


From marlin_rowley at hotmail.com  Sat May 17 16:34:38 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 15:34:38 -0500
Subject: how to use the transpose function in numpy?
Message-ID: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>

All:
 
Say I have a series of arrays arranged like so:
 
[[[0,1,2,3]
[4,5,6,7]
[8,9,10,11]
[12,13,14,15]]
 
[[16,17,18,19]
[20,21,22,23]
[24,25,26,27]
[28,29,30,31]]]
 
Now if I do this: transpose((2,0,1)), I get this:
 
[[[0,4,8,12] [16,20,24,28]]
[[1,5,9,13] [17,21,25,29]]
[[2,6,10,14][18,22,26,30]]
[[3,7,11,15][19,23,27,31]]]
 
This is NOT what I want.  I want the new array to be:
 
[0,4,8,12][1,5,9,13]
[2,6,10,14][3,7,11,15]
[16,20,24,28][17,21,25,29]
[18,22,26,30][19,23,27,31]
 
How do I do this?
 
-M
_________________________________________________________________
Make every e-mail and IM count. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ MakeCount
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From upton at virginia.edu  Thu May 15 20:07:51 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 20:07:51 -0400
Subject: send yield
In-Reply-To: <200805152005.52062.kyrie@uh.cu>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
Message-ID: <5504f9ac0805151707o1998d947sa210fc2aeec59712@mail.gmail.com>

On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
> On Thursday 15 May 2008 09:32:37 am castironpi wrote:
>> Why can't I write this?
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>
> yield recieved.
>
> Thanks.

Should that be

ack yield

?


From upton at virginia.edu  Mon May 12 22:36:53 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 12 May 2008 22:36:53 -0400
Subject: how to get information of a running prog in python
In-Reply-To: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805121936k1c835b20w8d59927d3e457004@mail.gmail.com>

On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0219 at gmail.com> wrote:
> Well, i know it may be a little non-python thing, however, I can think
>  of no place better to post this question :)
>
>  can anyone tell me, in python, how to obtain some information of a
>  running program?
>  paticularly, if i am playing some music in audacious or other media
>  player, how can i get the the name and some other info of current
>  playing song? It seems that audicious doesn't output on run-time
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>

In most cases, you'll probably need some sort of API, either in the
program itself or through some sort of plugin, that lets external
programs query it.  For instance, there are some plugins to WinAmp
that allow external programs (like Last.FM or Mog-O-Matic) to see what
track is currently playing.  You may also be able to do something like
get the window title (again, WinAmp's title bar usually includes the
artist and title) and parse it out.  I don't really know that there's
anything specific to Python for accessing these though, and it may
vary depending on media player.

Just my two cents...

-dan


From vivainio at gmail.com  Sun May 11 16:00:42 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 11 May 2008 20:00:42 GMT
Subject: observer pattern  (notification chain synchronization)
References: <JqEUj.52492$Bb3.45491@trnddc01> <tFYUj.138$5Y1.88@trnddc04>
	<mailman.871.1210342518.12834.python-list@python.org>
	<ajuVj.23627$5Y1.15331@trnddc04>
Message-ID: <87prrswqz7.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:


> OK, thanks.
>
> Another approach is to begin with a set of stocks
>
> and remove them as they report.  You can then trigger
>
> a report with the empty set instead of repeatedly
>
> calling ``all``. After a report the set can be
>
> "refilled".

Ah, and I obviously didn't read the whole thread before posting ;-)


From daveparker at flamingthunder.com  Mon May 19 22:51:41 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 19:51:41 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <90007ef4-0b1e-46ea-b8dc-116407e538af@q24g2000prf.googlegroups.com>

Your point about for-loops was applicable not only to Python, but to
many other programming languages.  So in response, I've added two new
for-loop variations to Flaming Thunder.

The two new variations are for-forever-do and for-expression-times-do.
For-forever allows you to explicitly create infinite loops, and for-
expression-times allows you to do something a specific number of times
without having to declare a looping variable if you don't need one.
Examples:

   Write "Fa".  For 8 times do write "-la".

   For forever do
     (
     Write "Do you know the definition of insanity? ".
     Read response.
     ).

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
>
> for x in range(10):
> ? ? #do something 10 times
>
> isunPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
>
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?



From maxwell.newlands at gmail.com  Thu May 15 10:02:20 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 07:02:20 -0700 (PDT)
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
	<692sk0F3090hfU1@mid.uni-berlin.de>
	<46abd84e-f943-48a5-94b9-81f2f47cc887@f63g2000hsf.googlegroups.com>
Message-ID: <974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>

On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > i currently have locations of the mp3s in question as strings, which
> > > works for parsing local files, but gives me a "No such file or
> > > directory" error when it tries to process URLs. ?it seems terribly
> > > inefficient to download each mp3 just to get at that small tag data,
> > > and i assume there's a way to do this with file() or open() or
> > > something, i just can't get it to work.
>
> > You can use `urllib2.urlopen()` to open URLs as files. ?But if you deal
> > with ID3 V1 tags you'll have to download the file anyway because those are
> > in the last 128 bytes of an MP3 file.
>
> > Ciao,
> > ? ? ? ? Marc 'BlackJack' Rintsch
>
> Just don't import time. ?What would you do with an autolocking timer,
> such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> of a lady.

thanks guys.  i guess i just figured there'd be a way to get at those
id3 bytes at the end without downloading the whole file.  if java can
do this, seems like i should just stick with that implementation, no?


From ewertman at gmail.com  Sat May 24 10:07:49 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Sat, 24 May 2008 10:07:49 -0400
Subject: Python is slow
In-Reply-To: <g1947a$v28$1@news.mtu.ru>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
	<g1947a$v28$1@news.mtu.ru>
Message-ID: <92da89760805240707o41c580a8mdf99e5e0ceb4b8b5@mail.gmail.com>

> if python is such a good programming/scripting language, why can't they
> build a faster interpreter/compiler engine? and beat php and zend.
> to the python team, rebuild your interpreter!

while this is just a boring troll.. it does bring me to a more
interesting point... it would be cool if the interpreter were
multi-threaded to make better use of smp systems.  While you can do
threading, if you really want to drive more than one cpu some forking
is in order.


From bignose+hates-spam at benfinney.id.au  Sun May 18 21:38:37 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 19 May 2008 11:38:37 +1000
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <87abinjco2.fsf@benfinney.id.au>

cmoller <cmoller at dpbioventures.com> writes:

> I am new to Python and the use of discussion groups.

Welcome to both.

> Is there a FAQ for basic information so certain questions are not
> repeated?

Congratulations on asking this question; it puts you ahead of many
other first-time posters.

Python's official FAQ documents are on the Python site
<URL:http://www.python.org/doc/faq/>.

Despite its arrogant tone, the document "How to Ask Questions the
Smart Way" <URL:http://www.catb.org/~esr/faqs/smart-questions.html> is
a good guide for interacting well with technical discussion forums.

-- 
 \       "I bet one legend that keeps recurring throughout history, in |
  `\           every culture, is the story of Popeye."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From eric.hanchrow at gmail.com  Thu May  8 18:15:28 2008
From: eric.hanchrow at gmail.com (offby1)
Date: Thu, 8 May 2008 15:15:28 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
	<op.uas99gjvev04yd@melwxp23><fvu3rf$je4$1@news.xmission.com> 
	<op.uatraax1ev04yd@melwxp23>
	<mailman.808.1210280689.12834.python-list@python.org>
Message-ID: <c296ac55-ae33-454c-a694-21cd193131f9@s33g2000pri.googlegroups.com>

Been there, done that:
http://polyglot-anagrams.googlecode.com/svn/trunk/python/


From fc14301589 at icqmail.com  Tue May 27 04:21:01 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Tue, 27 May 2008 16:21:01 +0800
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <483bc46e_2@news.tm.net.my>

On 06:39, marted? 27 maggio 2008 Jean-Claude Neveu wrote:

> However, if I understand right, the Python poplib library will also
> parse the email for me so that I can iterate through the headers

See my program at http://it.geocities.com/call_me_not_now/index.html
You may study it.

But for short you can use

from email.Parser import HeaderParser
# then you can parse the mail, body etc here below

M = poplib.POP3('mail.blah.com')
M.user('username')
M.pass_('password')
numMsgs = len(M.list()[1])
for cnt in range(1, numMsgs +1):
    header= M.top(cnt,0)[1])

HTH


From netizen at gmx.de  Fri May 23 03:29:42 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 09:29:42 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
	<slrng3b383.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <scsc34la11kr9mpou8h09aifjnvq6680mh@4ax.com>

.oO(Nick Craig-Wood)

>Damon Getsman <dgetsman at amirehab.net> wrote:
>> PHP has great support for accessing a MySQL database,
>
>Actually I'd say PHP's mysql support is lacking a very important
>feature.  mysql_query() doesn't support parameters (or placeholders,
>usually '?')

Where were you the last couple of years? It's lacking a lot more
features, but that's not the fault of the MySQL extension, which is
quite old. Meanwhile we have the improved MySQL extension and PDO.

>It is not a big deal, but I've had it drummed into me to always use
>parameters for user input and I was really suprised PHP didn't have
>them.

PHP supports them since _years_, you just have to choose the right
database interface.

Micha


From deets at nospam.web.de  Tue May 27 08:50:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 May 2008 14:50:23 +0200
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <6a2edeF356g4eU1@mid.uni-berlin.de>

David C. Ullrich wrote:

> What version added decorators (using the
> @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)
> 
> Is there a somthing such that "from __future__ import something"
> will make decorators work in 2.5.2?

They do work. They were introduced in python2.4

Diez


From straton at lampsacos.demon.co.uk  Mon May 19 09:31:51 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Mon, 19 May 2008 14:31:51 +0100
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <g0rvga$pki$1$8300dec7@news.demon.co.uk>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
> 
> Thanks.
The vast majority of my Python work is Non-GUI.

As an example, this weekend, I wrote a script to help
in making a 'Lyrics' track in an audacity file, which
is (more-or-less) an XML variety.

In audacity, I created 'markers' in the file (as
the song played) at the start of each line. The result
was 'blank' markers at the correct times:

<labeltrack name="Lyrics" numlabels="25">

     <label t="18.50121034" t1="18.50121034" title=""/>

     <label t="24.34844390" t1="24.34844390" title=""/>

<!-- Etc -->
		
</labeltrackl>


My Python script took a text file, and inserted the words, as well
as a title for the whole song.


<labeltrack name="Lyrics" numlabels="26">
     <label t="0.25" t1="0.25" title="Katie Melua. 'Nine million 
bicycles in Beijing' "/>
     <label t="18.50121034" t1="18.50121034" title="There are nine 
million bicycles in Beijing,"/>
     <label t="24.34844390" t1="24.34844390" title="That&apos;s a fact,"/>
     <label t="27.12436227" t1="27.12436227" title="It&apos;s a thing we 
can&apos;t deny,"/>


<!-- Etc -->
		
</labeltrackl>


(The script used FourSuite)

You can do this in FourSuite itself, but it can be error-prone if
you miss out one.

I can this in 'Scite' a text editor which puts your input in one window, 
and the output in another. Scite is a text editor that comes free with
Ruby, by the way.


From castironpi at gmail.com  Thu May 15 22:27:14 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:27:14 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
	<mailman.1190.1210886791.12834.python-list@python.org>
	<b35052c8-34e5-4bb3-9c69-713d43c061cc@34g2000hsf.googlegroups.com>
Message-ID: <37761a22-23db-455e-b23c-6b89a1ae77b2@b1g2000hsg.googlegroups.com>

On May 15, 6:53?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 4:26?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
>
>
> > On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgra... at gmail.com> wrote:
> > > On May 15, 3:47 pm, m... at pixar.com wrote:
> > >> I'm cleaning up some old code, and want to see what orphan
> > >> functions might be sitting around.
>
> > >> Is there a static call tree analyzer for python?
>
> > > How about
> > >http://pycallgraph.slowchop.com/
>
> > > ...
> > > Jay Graves
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > Have you checked to see if PyChecker or pylint can help you?
> > Apparently they can find unused variables at least, I don't know
> > whether they do functions or not.
>
> I think of dynamic programming and dynamic code, but voice. ?Does that
> mean sing about it?- Hide quoted text -
>
> - Show quoted text -

I have to write a song.  Somebody?


From bj_666 at gmx.net  Mon May 19 05:07:46 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 09:07:46 GMT
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<69ckkgF31kls5U1@mid.uni-berlin.de>
	<acb42f90-a025-4b02-81fa-7ad0a8560665@26g2000hsk.googlegroups.com>
Message-ID: <69cub2F31kls5U2@mid.uni-berlin.de>

On Mon, 19 May 2008 00:14:25 -0700, sapsi wrote:

> Yes, that could be the case. Browsing through hadoop's source, i see
> stdin in the above code is reading from piped Java DataOutputStream.
> I read of a libray on the net Javadata.py that reads this but it has
> disappeared.
> What is involved in reading from a Dataoutputstream?

According to the Java docs of `DataInput` and `DataOutput` it is quite
simple.  Most methods just seem to write the necessary bytes for the
primitive types except `writeUTF()` which prefixes the string data with
length information.

So if it is not Strings you are writing then "hadoop" seems to throw in
some information into the stream.

Ciao,
	Marc 'BlackJack' Rintsch


From deets at nospam.web.de  Fri May 16 11:28:10 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 May 2008 17:28:10 +0200
Subject: TPCServer and xdrlib
In-Reply-To: <41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>
References: <mailman.1216.1210933005.12834.python-list@python.org>
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com>
	<695crbF303jk4U1@mid.uni-berlin.de>
	<41da63d3-7b9c-4fd4-8fcc-7a115e6427a8@25g2000hsx.googlegroups.com>
Message-ID: <695ngoF30u8tgU1@mid.uni-berlin.de>

Henrique Dante de Almeida schrieb:
> On May 16, 9:26 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>>  Did you consider gzipping your XML (or YAML) packets ? Would the
>>> transfer time be acceptable in this case ?
>> That would add even more to the overhead of transcoding the
>> transportlayer. Switching from XMLRPC to a json-based protocol reduced
> 
>  Yes, that's why I suggested YAML.
> 
>> in a project of mine reduced the overhead 10-20fold - mainly because of
>> reduced size and parsing efforts.
> 
>  I don't think so. It probably just the reduced size (check if the
> json file is around 10 times smaller).
> 
>  I believe the server will be mostly I/O-bound, ie, most overhead will
> be in the data link/physical layers. The compression/parsing time (a
> few microseconds) should be a small fraction of the total transfer
> time (a few milliseconds). Even if the service is not I/O bound,
> (considering the Youtube example) if there's significant traffic in
> the server, the database access time should be the most significant.
> 
>  I have used compression for SOAP messages in a GPRS (~20kbps) link
> and got similar performance improvements (the web server was set to
> automatically compress the data).

I'm sorry, yes - I forgot that the main problem was the pure message 
size due to some quadratic behaviour, which made things CPU-bound.

Still, XML-parsing is much more expensive, and packing/unpacking will of 
course add to that.

Diez


From mnordhoff at mattnordhoff.com  Tue May  6 15:00:22 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Tue, 06 May 2008 19:00:22 +0000
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
Message-ID: <4820AAC6.7050307@mattnordhoff.com>

Mike Driscoll wrote:
> On May 6, 8:44 am, jmDesktop <needin4mat... at gmail.com> wrote:
>> Studying OOP and noticed that Python does not have Interfaces.  Is
>> that correct?  Is my schooling for nought on these OOP concepts if I
>> use Python.  Am I losing something if I don't use the "typical" oop
>> constructs found in other languages (Java, C# come to mind.)  I'm
>> afraid that if I never use them I'll lose them and when I need them
>> for something beside Python, I'll be lost.  Thank you.
> 
> In my school, we didn't even discuss the concept of interfaces (except
> for CLI and GUI, that is). So I looked it up. I assume you are
> referring to something like what's found here:
> 
> http://java.sun.com/docs/books/tutorial/java/concepts/interface.html
> 
> If so, then it looks like an Interface is a generic class with method
> stubs. You can do that with Python just as easily by creating empty
> methods with just the "pass" keyword. It also reminds me of
> Decorators...so you might want to look at those.

Instead of just using "pass", you should "raise NotImplementedError".

>From the docs: "In user defined base classes, abstract methods should
raise this exception when they require derived classes to override the
method."

> Since it's just a construct to implement polymorphism, I don't think
> you'll lose anything. However, Python does not require you to re-
> implement every method of the class it is inheriting from. You can
> just override those that you want and leave the others alone.
> 
> Hopefully I understand this correctly...otherwise, just ignore my
> babbling and hand waving.
> 
> Mike
-- 


From dblubaugh at belcan.com  Wed May 14 11:20:57 2008
From: dblubaugh at belcan.com (Blubaugh, David A.)
Date: Wed, 14 May 2008 11:20:57 -0400
Subject: HASH TABLES IN PYTHON
Message-ID: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>

To Whom It May Concern,


I was wondering if anyone has ever worked with hash tables within the
Python Programming language?  I will need to utilize this ability for
quick numerical calculations.  


Thank You,


David Blubaugh




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From deets at nospam.web.de  Fri May  9 04:14:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 May 2008 10:14:03 +0200
Subject: Python GUIs and custom controls
In-Reply-To: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <68ifekF2sqbg2U1@mid.uni-berlin.de>

Joe P. Cool schrieb:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.

If you can work with the license (GPL), I suggest Qt4

Diez


From sayang-87 at docomo.ne.jp  Wed May 14 10:59:22 2008
From: sayang-87 at docomo.ne.jp (sayang-87 at docomo.ne.jp)
Date: Wed, 14 May 2008 23:59:22 +0900 (JST)
Subject: how to send files via bluetoot
Message-ID: <IMTX0lz70f7f54c10wos@docomo.ne.jp>




From frikker at gmail.com  Mon May 19 14:26:41 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 11:26:41 -0700 (PDT)
Subject: Thread output with ncurses
Message-ID: <d103c7c3-1e62-4390-ba85-7142b39c9b01@r66g2000hsg.googlegroups.com>

Hey everyone,
  I currently have three independent applications that all 'do
something' and output to the console when events are triggered.  I'd
like to combine these all into a single ncurses application.  The idea
would be that the application simply has three 'windows' or 'pads' and
each thread would output to their respective one.  What is the best
way to go about this? Would I want to use a pad or window? Is this
common functionality that is already implemented? (ie scrolling
textbox that is easily written to like the console is).

Any help or tips would be appreciated.  Thanks!
-Blaine


From gherron at islandtraining.com  Thu May  1 05:10:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 01 May 2008 02:10:45 -0700
Subject: Is vs Equality Operator
In-Reply-To: <706397.16040.qm@web35903.mail.mud.yahoo.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <48198915.3020804@islandtraining.com>

Good Z wrote:
> Hello,
> I am having problem in using is. Here is what i am doing.

Short answer:  Use == for equality.    Don't use "is".  Ever!  
(Especially if you are a newbie.)

Longer answer:  In a dozen years of programming Python, the only time I 
use "is" is when testing for something like 
  if x is None
but, even then
  if x == None
works just as well, and in any case, there is usually a better way.  
(See below.)

Don't use "is" until you can explain the following
 >>> 11 is 10+1
True
 >>> 100001 is 100000+1
False


>
> x=''
> if x is None or x is '':
>         return 1

Both None and an empty string (and empty lists, empty dictionaries, 
empty sets, and numeric values of 0 and 0.0) all evaluate a False in an 
if statement, so the above if statement can be written as

  if not x:
      return 1

If you have to test for None, just do
  if not x:

If you have to differentiate between a value of None and something that 
evaluates to False (e.g., and empty list) then do
  if x is None:
    # handle None explicitly
  elif not x:
    # handle empty list

>
> The above statement does not return value 1.
>
> If i changed the above check to
> if x == None or x == '':
>         return 1
> Now it works fine.
>
> Any idea. What is happening here. I am using python 2.4.4 on ubuntu.
>
> Mike
>
> ------------------------------------------------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try 
> it now. 
> <http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From notnorwegian at yahoo.se  Sat May 24 00:52:57 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 21:52:57 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
Message-ID: <8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>

On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> notnorweg... at yahoo.se writes:
> > when running a very computationalheavy program in the shell it
> > sometimes freezes but the commandprompt runs it without problems
>
> Can you tell us exactly which programs you mean when you say "the
> shell" and "the commandprompt"?
>
> --
>  \      "One seldom discovers a true believer that is worth knowing."  |
>   `\                                               -- Henry L. Mencken |
> _o__)                                                                  |
> Ben Finney

commandprompt = windows dos-windows

shell = standard python interactive prompt


From subhabrata.iisc at hotmail.com  Wed May 28 04:15:22 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 01:15:22 -0700 (PDT)
Subject: Problem with py2exe
Message-ID: <114d8694-0d1d-4917-809d-a3d7b6443487@j33g2000pri.googlegroups.com>

Dear Members of the group,
py2exe does not seem to be integrating with 2.5 or later versions.
I was trying to run it but requested only for 2.3.
How can I run it?
If any one can kindly help.
Regards,
Subhabrata Banerjee.


From cmoller at dpbioventures.com  Sun May 18 20:34:29 2008
From: cmoller at dpbioventures.com (cmoller)
Date: Sun, 18 May 2008 17:34:29 -0700 (PDT)
Subject: New to Python, Discussion Groups.
Message-ID: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>

Hi,

I am new to Python and the use of discussion groups. Is there a FAQ
for basic information so certain questions are not repeated?

I am NOT an experienced programmer, but have decided to write a data
logger for sensors sending data via an internal ethernet work to
machines running OS X (Intel). The program should store data and allow
real time plotting. It does not need a beautiful GUI, but I may want
to share the program with others, so it should be somewhat intuitive.
It looks like I could use Python to access MS Excel, which would
significantly reduce the effort, but I am not sure if this is
practical. I am not in a hurry and would approach the problem as a way
to learn.

The data I am processing is readily seen via telnet so I know it's
there.

Is Python a good choice or should I invest in learning a language well
known to be best for applications like this? Are there other key
topics in addition to network programing that I should be focusing on?


Thanks,

Chris


From kamhung.soh at gmail.com  Tue May 13 23:04:39 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 14 May 2008 13:04:39 +1000
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
	<mailman.960.1210570776.12834.python-list@python.org>
	<MSqWj.266252$pM4.8985@pd7urf1no>
Message-ID: <op.ua4it2jtev04yd@melwxp23>

On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:

> Gabriel Genellina wrote:
>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca>  
>> escribi?:
>>
>>> Collin wrote:
>>>> I'm pretty new to Python, but this has really bugged me. I can't find  
>>>> a
>>>> way around it.
>>>>
>>>>
>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>
>>>> Any help would be appreciated. Thanks.
>>>
>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>  No need to apologize...
>>
>>> I read the error message just now a bit more carefully, and I tried
>>> something. I tried defining "yes" as some random numerical value. Then
>>> when I did:
>>> (example code)
>>>
>>> yes = 123123983 #some number
>>> test = input("Test test test ")
>>> if test == yes:
>>> 	print "It worked."
>>> else:
>>> 	print "failed"
>>>
>>> (example code off)
>>  The usual way for Python<3.0 is:
>>  answer = raw_input("Test test test ").lower()
>> if answer == "yes":
>>      ...
>>  The input() function evaluates user input as an expression: if he  
>> types 2+5 the input() function returns the integer 7. I would never use  
>> input() in a program - it's way too unsafe; use always raw_input  
>> instead.
>>
>
> If I use it like that, do I have to import anything to have the .lower()  
> work? And if I do, what does the .lower() signify?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You don't need to import any module to use ".lower()"; it is a method of a  
string.  raw_input() returns a string, so you can use methods of a string.

Try the following statement to see what happens:
"ABCDE".lower()

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From alokkat at gmail.com  Wed May 28 00:13:33 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 00:13:33 -0400
Subject: Struct usages in Python
Message-ID: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>

Dear All,

This might be very basic question for python, but I have been struggling
with it.  Your help will be highly appreciated.

I have a class like below:

class Event():

   def __init__(self, cameraEventType="", zone=99, setDay="",setTime ="",
clrTime=""):

     self.cameraEventType = cameraEventType

     self.zone = zone

     self.setDay = setDay

     self.setTime = setTime

     self.clrTime = clrTime

I want to use array of Event class object in another class like below:

class EventTimeFilter:

   def __init__(self):
           self.event[] = Event()   *# Seems this is not allowed ?? *

Can someone help me how can I use array of Event object in EventTimeFilter
class. I planned to fill array of Event object in EventTimeFilter class
method.

Thanks in advance.

Regards
Alok
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From Joshuajruss at gmail.com  Tue May 13 09:46:04 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Tue, 13 May 2008 06:46:04 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
Message-ID: <ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>

Any programming that helps you solve a problem is fun and
recreational. At least, that's how I look at it. I suppose it really
depends on why you're doing it, what your objective is, etc. But I'd
say, why not?

Tron! That's one I haven't seen in awhile. I'll have to take a mental
note to rent the movie again someday. I always thought a game based on
the movie hackers would be cool. Actually not based on the movie
itself, but on that 3D computer world they kept breaking into. Ah man,
it's so funny looking back on that film. Gibson, that's what they
called it. It was like a 3D database. That in itself wouldn't make a
very good game, but I suppose one could easily be created around that
idea. Perhaps it could be combined with Lawnmower-man. You're somehow
trapped in this 80's looking 3D world that has access to all the
world's information. More stuff could be thrown in to make it more
interesting. And of course, there would have to be hidden references
or parodies to whatever movies inspired it.

Good luck with your project

Sincerely,
Joshua


On May 13, 9:02?am, castiro... at gmail.com wrote:
> Hi all.
>
> I am trying to write to the Python newsgroup. ?I doubt (aha, but
> doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> this the Python newsgroup? ?I heard it was called comp.lang.python.
> Now to repeat the subject line. ?I'm stuck in Python.
>
> Now that was fun. ?I will also try to enumerate simple screen savers
> (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> breaking scale to compile the results. ?Shall I proceed? ?The risk is
> "overunity", such that one person can't be at liberty to live, which
> in some technical political arenas would be an "anarchy", but there
> are sufficiently many of those that I will too.
>
> Does anyone want such a list, or if not, is it at least fun and
> recreational to make it? ?The dollar would come along the lines of
> PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> and peaceable. ?(As the above would show, you would be free to
> approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> Guido getting his fair share? ?I am prepared to share with him.)
> Check in his name.
>
> I want to try to ally with other programmers and make cool games, like
> Tron, that one party can make games for on a console, such as live
> obstacles, incl. tear-down, and certain people have to play from time
> to time. ?But you can't charge to do it, so it's a guaranteed game.
> (That in virtue of that I'm typing.) ?Advantages include microspacing
> of time. ?Very summer.
>
> Resemblances would include Dungeons & Dragons with multi-host, or
> multi-ref small-shooter sport-likers. ?The real-time is definitely
> attractive (duh). ?As for voice, it's not clear it's the most
> entertaining, but I just don't have a mic.
>
> However, forseeing, I return with sailing, but that's in 3-space and
> not even in code, as though we'd construct the Royal Navy and battle.
> But I think we can keep it well.
>
> Thing is, someone has to play it to keep a synch (keep from falling),
> and tap-outs would have to live.
>
> Side note: In political theory, this is known as the problem of
> nominating a successor. ?Would it stay afloat, even for long enough to
> make it worth the negatives, yes which do include tear-down and fall,
> invasion of privacy, and rights infrigement?
>
> I code in Python (get the callbacks), but configurable servers could
> spread the work out, using relays to put each person on each's own
> turf to be a ref. ?If you feed the roles, it could get really fun, and
> c-l-py is the appropriate place to start such a thing, both and ask if
> it's been done before.



From info at thegrantinstitute.com  Tue May 20 03:28:23 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 20 May 2008 00:28:23 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Manchester,
	New Hampshire)
Message-ID: <20080520002823.B4A9F3FDD99F568E@thegrantinstitute.com>

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From marco at sferacarta.com  Thu May 15 06:49:33 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 15 May 2008 12:49:33 +0200
Subject: python newbie: some surprises
In-Reply-To: <3c0c.482c0fc1.3224e@altium.nl>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
	<3c0c.482c0fc1.3224e@altium.nl>
Message-ID: <3zUWj.44548$o06.42475@tornado.fastwebnet.it>

Kees Bakker wrote:


> So far, I have seen only one editor that understands the difference between
> TABs and indentation, and that is Emacs.

Oh, well... in .vimrc:

     autocmd FileType python set tabstop=8
     autocmd FileType python set softtabstop=4
     autocmd FileType python set expandtab



From castironpi at gmail.com  Wed May 14 20:40:55 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 17:40:55 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com>
Message-ID: <3ec3bdb4-b3ac-4ca2-b22a-1746f24d8195@b1g2000hsg.googlegroups.com>

On May 14, 1:06?pm, castiro... at gmail.com wrote:
> On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > you can safely ignore its posts.
>
> > > > > > > How does it generate text?
>
> > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > However you know what would be helpful? ?If I could go to the right
> > > > > place to start the ring.
>
> > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > I'd stay on mutability for the world domination factor. ?Fluent
> > > currency is buoyant currency; turn on a local clock, and someone gets
> > > some cubic verticals.
>
> > > Now if sense-reference is trading on the BDFL, I'm still holdingTron
> > > can pretty well win work.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I have a self-referential on Pygame: it's a Hand Tool object.
> > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > - Show quoted text -
>
> If Python can plot in to chess, andTronrings live, then why not group?

I am taking a cautious tack on this one: I'm starting mouse first,
self.x+= sin( radians( self.degrees ) ).


From ivan.illarionov at gmail.com  Mon May 12 01:18:37 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 05:18:37 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <g08jvd$2k0g$1@news.mtu.ru>

>> In such cases, the name 'dummy' is conventionally bound to the items
>> from the iterator, for clarity of purpose
[..]
> If a value isn't used, then I think the most clear name for it is
> "unused".
[...]

Maybe my brain works differently, but I find both "dummy" and "unused" 
are extremely confusing names for loop counters. The loop begins to look 
like it doesn't iterate at all if its counter is dummy or unused.

If it *counts* it is *used* and it's *not* dummy.

Why reinvent the wheel when "a common identifier naming convention is for 
the loop counter to use the variable names i, j and k (and so on if 
needed)" (from Wikipedia http://en.wikipedia.org/wiki/Loop_counter )

-- Ivan


From jaywgraves at gmail.com  Thu May 15 17:19:17 2008
From: jaywgraves at gmail.com (jay graves)
Date: Thu, 15 May 2008 14:19:17 -0700 (PDT)
Subject: call tree tool?
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
Message-ID: <13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>

On May 15, 3:47 pm, m... at pixar.com wrote:
> I'm cleaning up some old code, and want to see what orphan
> functions might be sitting around.
>
> Is there a static call tree analyzer for python?

How about
http://pycallgraph.slowchop.com/

...
Jay Graves


From pupeno at pupeno.com  Fri May 16 03:32:21 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Fri, 16 May 2008 00:32:21 -0700 (PDT)
Subject: ElementTree and DTDs
References: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>
Message-ID: <17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>

Or is there another library that would handle DTDs correctly,
performing entity replacements?

Thanks.

On May 16, 12:20?am, J. Pablo Fern?ndez <pup... at pupeno.com> wrote:
> Hello,
>
> Is ElementTree supposed to load DTDs? I have some xmls heavy on
> entities and it fails this way:
>
> Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42)
> [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> filename = "revo/xml/a.xml"
> >>> import xml.etree.ElementTree as ET
> >>> ET.parse(filename)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 862, in
> parse
> ? ? tree.parse(source, parser)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 586, in
> parse
> ? ? parser.feed(data)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in
> feed
> ? ? self._parser.Parse(data, 0)
> ? File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1201, in
> _default
> ? ? self._parser.ErrorColumnNumber)
> xml.parsers.expat.ExpatError: undefined entity &jcirc;: line 13,
> column 10>>> import xml.etree.cElementTree as ET
> >>> ET.parse(filename)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "<string>", line 45, in parse
> ? File "<string>", line 32, in parse
> SyntaxError: undefined entity &c_j;: line 46, column 17
>
> Thanks.



From marco at sferacarta.com  Wed May  7 08:24:34 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:24:34 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <Xns9A9786AA544CEduncanbooth@127.0.0.1>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
Message-ID: <9chUj.34561$o06.23748@tornado.fastwebnet.it>

Duncan Booth wrote:

> It does this:
> 
>>>> @greedy
> def getCommandsFromUser():
> 	while True:
> 		yield raw_input('Command?')
> 
> 		
>>>> for cmd in getCommandsFromUser():
> 	print "that was command", cmd
> 
> 	
> Command?hello
> Command?goodbye
> that was command hello
> Command?wtf
> that was command goodbye
> Command?


Not here..


In [7]: def getCommandsFromUser():
         while True:
                 yield raw_input('Command?')
    ...:
    ...:

In [10]: for cmd in getCommandsFromUser(): print "that was command", cmd
    ....:
Command?hi
that was command hi
Command?there
that was command there
Command?wuwuwuw
that was command wuwuwuw
Command?


From bignose+hates-spam at benfinney.id.au  Sat May 24 09:58:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 23:58:22 +1000
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <8763t3by81.fsf@benfinney.id.au>

Sh4wn <luckyluke56 at gmail.com> writes:

> first, python is one of my fav languages, and i'll definitely keep
> developing with it. But, there's 1 one thing what I -really- miss:
> data hiding. I know member vars are private when you prefix them with
> 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> before it.

>From whom are you trying to hide your attributes?

In Python, the philosophy "we're all consenting adults here" applies.
You shouldn't pretend to know, at the time you write it, all the uses
to which your code will be put. Barriers such as enforced "private"
attributes will only cause resentment when people, despite your
anticipations, *need* to access them and are then forced to hack their
way around them.

If you want the users of your code to know that an attribute should
not be used as a public API for the code, use the convention of naming
the attribute with a single leading underscore. This is a string
signal that the attribute is part of the implementation, not the
interface. The reader is then on notice that they should not rely on
that attribute; but they are not *prohibited* from using it if
necessary to their ends.

> Python advertises himself as a full OOP language, but why does it
> miss one of the basic principles of OOP?

Who taught you that enforced restrictions on attribute access was a
"basic principle" of OO?

Perhaps you're confusing the "encapsulation" and "abstraction"
principles for enforced access restrictions; they're not.

> Will it ever be added to python?

I hope not.

-- 
 \            "Why was I with her? She reminds me of you. In fact, she |
  `\             reminds me more of you than you do!"  -- Groucho Marx |
_o__)                                                                  |
Ben Finney


From artasis at gmail.com  Wed May  7 05:11:42 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Wed, 7 May 2008 02:11:42 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
	<68as2qF2r15d8U1@mid.uni-berlin.de>
Message-ID: <429872ac-b161-4f81-8a4a-f30129f84580@34g2000hsh.googlegroups.com>

On May 6, 3:00 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> arta... at gmail.com wrote:
> > Hi, that is my task:
> > I need to create python webserver-like extension(dll) which will run
> > php and python scripts as plugins.
> > I have no problems with dll creating and run python scripts, but I
> > cannot understand how to run php(CLI is not a solution).
> > Is there a way to solve this problem? I've thought to implement php to
> > HTTPServer-like python module, but as I see it's impossible. Solutions
> > with creating intermediate C-based module is allowed, but better
> > without them :).
> > AFAIK, php5ts.dll is that what I must use but how integrate it to
> > python webserver? that is a question
>
> http://www.amazon.com/Extending-Embedding-PHP-Developers-Library/dp/0...
>
> Might be of help.
>
> And maybe the roadsend PHP-compiler.
>
> Diez
thanks! great book! this would help with Jeff recommendations to use
ctypes



From george.sakkis at gmail.com  Sat May 10 03:43:22 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 10 May 2008 00:43:22 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com> 
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<494e9c6a-9346-4134-943b-249956bebdd0@a23g2000hsc.googlegroups.com> 
	<g0347n$404$1@news.xmission.com>
Message-ID: <061f6688-619f-4da5-a09d-533eefcde716@m45g2000hsb.googlegroups.com>

On May 9, 11:19?pm, dave <squareswallo... at 1ya2hoo3.net> wrote:
> On 2008-05-09 18:53:19 -0600, George Sakkis <george.sak... at gmail.com> said:
>
>
>
> > On May 9, 5:19?pm, umpsu... at gmail.com wrote:
> >>>> What would be the best method to print the top results, the one's that
>
> >>>> had the highest amount of anagrams?? ?Create a new histogram dict?
>
> >>> You can use the max() function to find the biggest list of anagrams:
>
> >>> top_results = max(anagrams.itervalues(), key=len)
>
> >>> --
> >>> Arnaud
>
> >> That is the biggest list of anagrams, what if I wanted the 3 biggest
> >> lists? ?Is there a way to specific top three w/ a max command??
>
> >>>> import heapq
> >>>> help(heapq.nlargest)
> > Help on function nlargest in module heapq:
>
> > nlargest(n, iterable, key=None)
> > ? ? Find the n largest elements in a dataset.
>
> > ? ? Equivalent to: ?sorted(iterable, key=key, reverse=True)[:n]
>
> > HTH,
> > George
>
> I both the 'nlargest' and the 'sorted' methods.. I could only get the
> sorted to work.. however it would only return values like (3, ?edam)
> not the list of words..
>
> Here is what I have now.. Am I over-analyzing this? ?It doesn't seem
> like it should be this hard to get the program to print the largest set
> of anagrams first...
>
> def anafind():
> ? ? ? ? fin = open('text.txt')
> ? ? ? ? mapdic = {}
> ? ? ? ? finalres = [] ? ? ? ? ? ? ? ? ? # top answers go here
> ? ? ? ? for line in fin:
> ? ? ? ? ? ? ? ? line = line.strip()
> ? ? ? ? ? ? ? ? alphaword = ''.join(sorted(line)) ? ? ? #sorted word as key
> ? ? ? ? ? ? ? ? if alphaword not in mapdic:
> ? ? ? ? ? ? ? ? ? ? ? ? mapdic[alphaword] = [line]
> ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? mapdic[alphaword].append(line)
> ? ? ? ? topans = sorted((len(mapdic[key]), key) for key in mapdic.keys())[-3:]
> ? #top 3 answers
> ? ? ? ? for key, value in topans: ? ? ? #
> ? ? ? ? ? ? ? ? finalres.append(mapdic[value])
> ? ? ? ? print finalres

Here is a working, cleaned up version:

from heapq import nlargest
from collections import defaultdict

def anagrams(words, top=None):
    key2words = defaultdict(set)
    for word in words:
        word = word.strip()
        key = ''.join(sorted(word))
        key2words[key].add(word)
    if top is None:
        return sorted(key2words.itervalues(), key=len, reverse=True)
    else:
        return nlargest(top, key2words.itervalues(), key=len)

if __name__ == '__main__':
    wordlist = ['live', 'evil', 'one', 'nose', 'vile', 'neo']
    for words in anagrams(wordlist,2):
        print words


By the way, try to generalize your functions (and rest of the code for
that matter) so that it can be reused easily. For example, hardcoding
the input file name in the function's body is usually undesirable.
Similarly for other constants like 'get top 3 answers'; it doesn't
cost you anything to replace 3 with 'top' and pass it as an argument
(or set it as default top=3 if that's the default case).

HTH,
George


From workitharder at gmail.com  Wed May 21 14:59:59 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 11:59:59 -0700 (PDT)
Subject: What replaces `` in py3k?
References: <e994f563-d434-48da-bcdf-f5e1da617796@59g2000hsb.googlegroups.com>
	<0ef180ba-6c67-425d-84c3-0b697cde27ea@v26g2000prm.googlegroups.com>
Message-ID: <3370b8e7-09cd-4447-8db3-9301d51b5f0e@d77g2000hsb.googlegroups.com>

On May 21, 10:48 am, Jonathan Gardner <jgard... at jonathangardner.net>
wrote:
> On May 21, 10:45 am, bukzor <workithar... at gmail.com> wrote:
>
> > What are backticks going to be translated into?
>
> repr

Thanks for the quick reply!
--Buck


From attn.steven.kuo at gmail.com  Wed May  7 21:43:57 2008
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Wed, 7 May 2008 18:43:57 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru> 
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <1d78290f-d78d-4668-aa47-896847c75607@n1g2000prb.googlegroups.com>

On May 7, 6:13 pm, Miles <semantic... at gmail.com> wrote:

(snipped)

>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
>
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
>  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)
>
>  This isn't incredibly efficient, but it does what you want (I think):
>
>  from itertools import chain
>
>  class multisliceable(list):
>   def __getitem__(self, slices):
>     if isinstance(slices, (slice, int, long)):
>       return list.__getitem__(self, slices)
>     else:
>       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
>                           else [list.__getitem__(self, s)] for s in slices]))
>
>  p = open('/etc/passwd')
>  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]
>
>  -Miles



There's also the operator module:

import itertools
import operator

idx = [one for one in itertools.chain([0], range(2, 6))]

wanted = operator.itemgetter(*idx)

q = [wanted(line.strip().split(':')) for line in file("/etc/passwd")]

--
Hope this helps,
Steven


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 03:38:12 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 09:38:12 +0200
Subject: Fill memeory with endless loop?
In-Reply-To: <go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
References: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>
	<mailman.1058.1210697975.12834.python-list@python.org>
	<fed22943-db2c-4044-8639-dd1114347096@34g2000hsf.googlegroups.com>
	<go0l249d2te9fleu2mid84jsara9bqkpfd@4ax.com>
Message-ID: <482a96de$0$9868$426a74cc@news.free.fr>

Tim Roberts a ?crit :
> globalrev <skanemupp at yahoo.se> wrote:
>> and when the program get skiled because out of memory all this will be
>> deleted from the memory?
> 
> Yes.  When a process is killed, all of the memory it was using is released.
> 
>> so there is no way that you can, by accident, fill your whole
>> harddrive and make it unusable?
> 
> Of course not.  Where do you see a connection between memory and your hard
> drive?

swap.

But that won't "fill your whole harddrive", indeed !-)



From castironpi at gmail.com  Tue May 13 07:24:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:24:00 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com> 
	<mailman.1045.1210677569.12834.python-list@python.org>
Message-ID: <86cac3e7-bf1f-4989-a2d9-90ad02c8d083@d45g2000hsc.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:46:45 -0300, <dannywebs... at googlemail.com> escribi?:
>
> > On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> >> Hi - I have a list returned from popen/readlines, and am wondering how
> >> to go about iterating over each item which was returned (rather than
> >> currently having the whole lot returned).
>
> >> >>> f=os.open("./get_hostnames").readlines
>
> > I did indeed mean "os.popen", no "os.open"
>
> Ouch, replace open with popen an my example is valid (but to get the ?
> meaning I intended to write, replace os.open with open...)
>
> --
> Gabriel Genellina

Yes: fine!  But, all we do is start a Tron ring, play Tron on
laptops.  You have micro-divide currency, you can probably make
musicals -too-; and I don't have enough to say to get this...

BE TALKING!


From davidj411 at gmail.com  Fri May 23 16:36:55 2008
From: davidj411 at gmail.com (davidj411)
Date: Fri, 23 May 2008 13:36:55 -0700 (PDT)
Subject: csv iterator question
Message-ID: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>

When you save an open file to a variable, you can re-use that variable
for membership checking.
it does not seem to be that way with the csv.reader function, even
when set to a variable name.

what is the best way to store the open CSV file in memory or do i need
to open the file each time?

example of open method on file object:
fhandle=open(filename).readelines()

example of csv.reader method:
reader = csv.reader(open(csvfilename))


here are my results:
>>> reader = csv.reader(open('export.csv'))
>>> for line in reader:
...  print line


<lots of data on page...>

but when i try to iterate through it again, it appears to print
nothing (no error either). the file is exhausted?

>>> for line in reader:
...  print line
...

do i need to seek() the beginning of this file object ? any help is
greatly appreciated here.


From bronger at physik.rwth-aachen.de  Tue May  6 11:56:43 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 06 May 2008 17:56:43 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <87iqxrfmtg.fsf@physik.rwth-aachen.de>

Hall?chen!

jmDesktop writes:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

See also http://www.python.org/dev/peps/pep-3119/

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From arkanes at gmail.com  Wed May 21 17:41:09 2008
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 21 May 2008 16:41:09 -0500
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
Message-ID: <4866bea60805211441x7a9f359bv8bf675cd825f9ea7@mail.gmail.com>

On Wed, May 21, 2008 at 4:29 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 3:17 pm, "Chris Mellon" <arka... at gmail.com> wrote:
>
>> If you're going to use every post and question about Python as an
>> opportunity to pimp your own pet language you're going irritate even
>> more people than you have already.
>
> Actually, I've only posted on 2 threads that were questions about
> Python -- this one, and the one about for-loops where the looping
> variable wasn't needed.  I apologize if that irritates you.  But maybe
> some Python users will be interested in Flaming Thunder if only to
> check the accuracy of the results that they're getting from Python,
> like I did on this thread.  I think most people will agree that having
> two independent programs confirm a result is a good thing.
> --

Please don't be disingenuous. You took the opportunity to pimp your
language because you could say that you did this "right" and Python
did it "wrong". When told why you got different results (an answer you
probably already knew, if you know enough about IEEE to do the
auto-conversion you alluded to) you treated it as another opportunity
to (not very subtly) imply that Python was doing the wrong thing. I'm
quite certain that you did this intentionally and with full knowledge
of what you were doing, and it's insulting to imply otherwise.

You posted previously that you wrote a new language because you were
writing what you wanted every other language to be. This is very
similar to why Guido wrote Python and I wish you the best of luck. He
was fortunate enough that the language he wanted also happened to be
the language that lots of other people wanted. You don't seem to be so
fortunate, and anti-social behavior on newsgroups dedicated to other
languages is unlikely to change that. You're not the first and you
won't be the last.


From benjamin.fremiot at gmail.com  Mon May 12 07:09:45 2008
From: benjamin.fremiot at gmail.com (Gruik)
Date: Mon, 12 May 2008 04:09:45 -0700 (PDT)
Subject: Import/Create module from buffer
References: <09bfaed8-8bf6-4faf-80f9-e0b97aa03127@a70g2000hsh.googlegroups.com>
	<mailman.974.1210588338.12834.python-list@python.org>
Message-ID: <bd784b86-a207-4972-b01f-00d810a6e015@e39g2000hsf.googlegroups.com>

On May 12, 12:31?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 12 May 2008 05:49:22 -0300, Gruik <benjamin.frem... at gmail.com> escribi?:
>
> > I'm currently working on python embedding with C++. My goal is that
> > the C++ part handle files writing/reading so that the Python part only
> > works with buffers.
>
> > I succeeded in buffer exchanges. The problem is that some of the files
> > I read/write are python files so that, before embedding, I imported
> > them as modules when I needed them.
>
> > But now that the Python part only receive buffers, I can't do it
> > anymore. So I wonder :
> > - is it possible to import module from a buffer instead of files?
> > - or is it possible to create a module object from my buffer?
>
> Yes, first compile the buffer to get a code object, then use PyImport_ExecCodeModule. See how this function is used in import.c
>
> --
> Gabriel Genellina

Thanks for your quick answer !
I think I'll have no problem with that in C++ and I'm going to try it
right after this message.

But before that 1 question: what if I'm in Python ?
Following your solution, I did that in Python :

    def load_buffer(buffer) :
        compiled_buffer = compile(buffer, "module_name", "exec")
        exec(compiled_buffer)

It works great except that I can't have a module object and that it is
as if I did "from module import *"
But I need the module object and not an "import *" behavior.
Any idea about the way to do that?

Benjamin


From bignose+hates-spam at benfinney.id.au  Fri May  2 09:30:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 23:30:01 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
Message-ID: <87k5iczvdy.fsf@benfinney.id.au>

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 13:24:01 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > I much prefer "#! /usr/bin/python" because I want my Python
> > programs to, by default, be run with the default Python, and
> > depend on Python being installed by the operating system's package
> > manager. On systems that use shebang lines and that actually have
> > standardised filesystem locations, the default Python is found at
> > '/usr/bin/python'.
> 
> You have lived a sheltered life.  Not every packaging system puts the
> executible in /usr/bin.  Many systems use /usr/local/bin.

"D'Arcy J.M. Cain" <darcy at druid.net> writes:

> On Fri, 02 May 2008 15:50:22 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > They use that for the operating-system-installed default Python
> > interpreter? Colour me incredulous.
> 
> OK, let me get out my crayons.  However, note that I did not say
> "operating-system-installed."

That is, however, the context I've been explicitly using since this
sub-thread began.

The OP was asking why people prefer on over the other. My answer is
that I prefer specifying "give me the default OS Python" because
anything not installed by the OS is to non-standardised for me to
worry about.

Others may prefer something different, but then they get to wear
whatever problems occur as a result of that choice. I continue to be
bemused by that preference, and nothing that I've seen so far in this
thread illuminates the issue more.

-- 
 \     "Nothing so needs reforming as other people's habits."  -- Mark |
  `\                                       Twain, _Pudd'n'head Wilson_ |
_o__)                                                                  |
Ben Finney


From arnodel at googlemail.com  Sun May 11 14:26:29 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 19:26:29 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
Message-ID: <m2abiw4rze.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

> On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:
>
>> bc90021 <python at bc90021.net> writes:
>> 
>>> Hi All,
>>>
>>> Thanks in advance for any and all help!
>>>
>>> I have this code:
>>>
>>> g = open(fileName, 'a')
>>>
>>> where fileName is defined before the line it's used in.  It works fine
>>> when I use it outside a thread class.
>>>
>>> When I put the same line in a thread class, it no longer works, and I
>>> get an error:
>>>
>>> IOError: [Errno 2] no such file u'fileName'
>>>
>>>
>> It's telling you that you haven't got a file called 'fileName'. Posting
>> the code that triggers this error would allow people to diagnose the
>> error accurately rather than guessing.
>
> f = open(otherFile).readlines()
> for i in len(f):
> 	for c in range(0,24,1):
> 		if os.name == "posix":
> 			tempfileName = "\"proctemp/" + self.matrix[c][0] 
> + "_tmp_" + fileName + ".txt\""
>    	if re.search(f[i], pattern):
> 		g = open(tempfileName, 'a')
> 		g.write(f[i])
>
>
> This code works *perfectly* unless I put it in a class that inherits from 
> threading.Thread.  In the thread class, everything works (I can see the 
> "c" value, and I can print out each line in "f[i]", it's just that the g 
> = open line doesn't work.

It's difficult to know what's wrong with the code you posted because:

* it is not self-contained: otherFile, fileName, pattern are names
  which you do not define;

* the IOError you reported earlier can't arise as a result of running
  this code.

* you claim it works unless you put it in a subclass of
  threading.Thread.  Why don't you post this instead, and show us the
  traceback?

HTH

FWIW, my crystal ball (whose predictions I don't usually report!)
tells me the same as Garry Herron's.

-- 
Arnaud


From duncan.booth at invalid.invalid  Fri May  9 04:00:17 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 08:00:17 GMT
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <Xns9A995B8F535E6duncanbooth@127.0.0.1>

andrej.panjkov at climatechange.qld.gov.au wrote:

> Indeed, there are many ways this could be done.  Some are more
> concise, some are more efficient.  As I said, I did it the way I did
> it to try out lambdas.  Your way achieves the result, rather elegantly
> I think, but teaches me nothing about using lambdas.

Unfortunately what you wrote taught you nothing about using lambda either. 
I think you were looking for it to have mystic powers, when in fact all it 
gives you is an alternative way to define a function.

> 
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.

It was blunt because your post was so wide of the mark, yet it was well 
written and at least at first glance sounded plausible. Other people had 
even followed up on minor points having apparently not spotted the bigger 
problem.

Remember that what you post here is going to be archived by Google and 
instructing (or misleading) people for years to come so jumping hard on 
factual errors is (I think) worthwhile. (And I really appreciate it every 
time other people have jumped on things I've got wrong.)

On the other hand, there are plenty of people who use lambda in situations 
which are more or less appropriate. Just how appropriate they are is 
usually a matter of opinion, and while I may express my opinion when I 
think they are misusing them, that's all it is: an opinion. Everyone is 
free to disagree (and generally does).


From j.spies at hccnet.nl  Sun May 18 16:29:37 2008
From: j.spies at hccnet.nl (Jaap Spies)
Date: Sun, 18 May 2008 22:29:37 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <56c15$483091b1$d4785a98$2536@cache6.tilbu1.nb.home.nl>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
> 
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C, but I like Python more.
> 
> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.
> 
> * I don't know how likely it is to find libraries in Python related to
> my research field.
> 
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?
> 

You definitely should take a look at Sage: http://www.sagemath.org/

This may offer all you need, based on Python integrating a lot of
other programs!

Jaap


From castironpi at gmail.com  Wed May 14 19:18:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:18:00 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com> 
	<873aokzgs9.fsf@benfinney.id.au>
	<aea52155-79d1-43ba-be28-add2c81e362c@a1g2000hsb.googlegroups.com>
Message-ID: <a76727e0-eaae-4894-b6f6-cbbf937afe7b@k37g2000hsf.googlegroups.com>

On May 14, 5:28?pm, castiro... at gmail.com wrote:
> On May 14, 5:01?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > > On 14 mai, 18:20, castiro... at gmail.com wrote:
> > > > I'm concerned over the future of Python. ?Should tuples be named?
>
> > > Obviously not, unless they should.
>
> > Clearly they should, unless not.
>
> > Ben Finney
>
> I have plenty of uses for them!

FOR INSTANCE!

def zoop_zoop_zoop( self ): pass


From wizzardx at gmail.com  Thu May  8 09:14:19 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 15:14:19 +0200
Subject: Parsing Email 'References' header.
In-Reply-To: <4822F7B6.2000403@gmail.com>
References: <4822F7B6.2000403@gmail.com>
Message-ID: <18c1e6480805080614r14d8d0c4t511a2bb4c0bc378a@mail.gmail.com>

On Thu, May 8, 2008 at 2:53 PM, Aspersieman <aspersieman at gmail.com> wrote:
> Hi
>
>  I have a python script that parses email headers to extract information
> from them. I need to get the _last_ messageid in the 'References' field
> (http://cr.yp.to/immhf/thread.html) to create a threaded view of these
> emails (these messageid's are stored in a database).
>
>  Now, I can easily access the 'References' field using the python 'email'
> module, but I need a regular expression to get the last messageid in the
> 'References' field.
>
>  Here's what I have so far:
>  <code>
>  rx_lastmesgid = re.compile(r"(<.+>$)")
>  lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) ) #
> parentid's value is
> eg:"<1 at mail.gmail.com><2 at mail.gmail.com><3 at mail.gmail.com><4 at mail.gmail.com><5 at mail.gmail.com>"
>  lastmesgid = "".join( filter( rx_lastmesgid.match, parentid ) )
>  </code>
>
>  I need it to return "<5 at mail.gmail.com>"
>
>  Can anyone help?
>

"<.*>(<.*?>)"


From inhahe at gmail.com  Fri May 30 03:09:43 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 30 May 2008 03:09:43 -0400
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <vJN%j.61538$7a.29246@bignews1.bellsouth.net>


"Gandalf" <goldnery at gmail.com> wrote in message 
news:13801bd3-50da-4773-a0aa-edcaf27e0c4d at 34g2000hsf.googlegroups.com...
> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
>
> mmm isn't their any global variable for functions?

how about
def aaaa():
  y = x+1
  if y > 1:
    return "wrong"
  else:
    return y

but if you really have to modify x outside of the scope of the function, 
well, i guess one possibility is to return a tuple, one element being a 
string that may or may not contain the word "wrong" and another being x, and 
then whatever's calling aaaa can change x in their own scope based on the 
return value. but other than that, the normal way to affect a variable 
beyond the scope of your function is to make a class and affect a class 
variable.  although there is always the 'global' statement also.





From malaclypse2 at gmail.com  Tue May 13 16:21:37 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Tue, 13 May 2008 16:21:37 -0400
Subject: built in list generator?
In-Reply-To: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
Message-ID: <16651e80805131321w6d7338cem36ff3d707d2b49f@mail.gmail.com>

On Tue, May 13, 2008 at 4:05 PM, globalrev <skanemupp at yahoo.se> wrote:
> if i want  a list with all numbers between x and y is there a way to
>  do this with an inbult function.
>
>  i mean i can always construct a function to do this but is there
>  soemthing like:
>
>  nbrs = list(range(50,100, 2))

What's wrong with just using range()?

>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 10)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 11)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> range(1, 11, 2)
[1, 3, 5, 7, 9]
>>>

-- 
Jerry


From enleverlesX.XmcX at XmclaveauX.com  Wed May  7 15:10:18 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 7 May 2008 21:10:18 +0200
Subject: Idea for P3K
In-Reply-To: <m2k5i6561z.fsf@googlemail.com>
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com>
Message-ID: <4821fea4$0$880$ba4acef3@news.orange.fr>

Hi!

> I don't often feel like using this word

Look at languages like OCAML or F #

@-salutations
-- 
Michel Claveau



From python at rcn.com  Wed May 14 13:41:26 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 14 May 2008 10:41:26 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
Message-ID: <a60a85e3-1a0b-4b60-a52b-e28c02fcfa4d@p25g2000pri.googlegroups.com>

>?Should tuples be named?

Yes.



From shahmed at sfwmd.gov  Fri May  9 09:54:16 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Fri, 9 May 2008 09:54:16 -0400
Subject: Pythonwin
In-Reply-To: <8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com><11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20AF825CE@EXCHVS01.ad.sfwmd.gov>

You need to install the same version on your pc, if you have 2.5 already installed you need to download 2.5 pythonwin from http://sourceforge.net

Hope it will work for you.
Thanks
sk


-----Original Message-----
From: python-list-bounces+shahmed=sfwmd.gov at python.org [mailto:python-list-bounces+shahmed=sfwmd.gov at python.org] On Behalf Of Clive_S
Sent: Friday, May 09, 2008 9:41 AM
To: python-list at python.org
Subject: Re: Pythonwin

Hi all

I downloaded (from Python) and installed python-2.4.4.msi

I have python and pythonw.exe in the Python 24 folder (but not in my
start menu).
When I click on the pythonw.exe it is not launched??

Thanks

Clive


On 9 May, 14:09, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 9, 5:30?am, Clive_S <clives... at yahoo.co.uk> wrote:
>
> > Hi
> > I am trying to use Python with ArcGIS.
> > I have installed Python 2.4. I have an icon for IDLE and command line.
> > I do not see Python PythonWin.
> > How do you install or launch pythonwin??
> > Thanks
> > Clive
>
> I have PythonWin installed in my Start Menu --> Programs --> Python
> 2.5. I may have installed the ActiveState version though. Just check
> if it's there on your system and if not, you can follow Niklas's
> advice.
>
> Mike

--
http://mail.python.org/mailman/listinfo/python-list



From bignose+hates-spam at benfinney.id.au  Fri May 23 23:48:41 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 13:48:41 +1000
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
Message-ID: <878wy0cqg6.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> when running a very computationalheavy program in the shell it
> sometimes freezes but the commandprompt runs it without problems

Can you tell us exactly which programs you mean when you say "the
shell" and "the commandprompt"?

-- 
 \      "One seldom discovers a true believer that is worth knowing."  |
  `\                                               -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From noah at noah.org  Sun May  4 20:22:59 2008
From: noah at noah.org (Noah)
Date: Sun, 4 May 2008 17:22:59 -0700 (PDT)
Subject: Where are Tkinter event.type constants defined?
Message-ID: <4a428d7d-1ec9-4383-a543-98bd725cfbb1@d19g2000prm.googlegroups.com>

I'm trying to match against Event.type for KeyPress and ButtonPress.
Currently I'm using integer constants (2 and 4). Are these constants
defined anywhere? The docs talk about KeyPress and ButtonPress, but I
don't see them in any of the Tkinter source files. Are these just
magic values that come out of the TK side of things and are not
defined in Python? Code like this makes me think I'm doing something
wrong:

    if event.type == 2:
        handle_key_press (event.char)
    elif event.type == 4:
        do_something_for_button ()
    else:
        pass # unknown event

(I understand that usually you would bind these function so that they
are called as a callback.)

I don't mind defining the constants myself. I just want to make sure
that I'm not missing something already done for me. Does anyone happen
to have a complete list of Event.type constants?

--
Noah


From fetchinson at googlemail.com  Tue May 13 18:34:03 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Tue, 13 May 2008 15:34:03 -0700
Subject: What is self.file = file for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <fbe2e2100805131534o5d84971cy66535dd03a42c0f7@mail.gmail.com>

> I have trouble understanding something in this code snippet:
>
> class TextReader:
>     """Print and number lines in a text file."""
>     def __init__(self, file):
>         self.file = file
>         .
>         .
>         .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.

This is a standard object oriented programming idiom. You might find
it useful to ask around on the 'tutor' mailing list of python --
http://mail.python.org/mailman/listinfo/tutor -- where you'll get
detailed explanations on basic OOP and python topics.

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From tjreedy at udel.edu  Fri May 16 20:13:42 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 20:13:42 -0400
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org><8763tea9sd.fsf@mulj.homelinux.net>
	<cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>
Message-ID: <g0l7vm$gjo$1@ger.gmane.org>


"????" <littlesweetmelon at gmail.com> wrote in message 
news:cdb837ea0805160309g6ea51644nf2337bcddc34eb21 at mail.gmail.com...
| > # an efficient 'Pair' class holding two objects
| > class Pair(object):
| >    __slots__ = 'first', 'second'
| >
| > Instances of Pair take up even less room that 2-element tuples
| > because they don't carry the size information in the object.
| >
| > Now, if the object class carried a dict with it, it would be
| > impossible to create a class like 'Pair'.
| >
| Really interesting. When the tuple ('first', 'second') is assigning to
| __slot__, a special operation is done which makes __slot__ pointing
| to a magic structure rather than a normal tuple. Am I right?

Try it.  Run the code and print P.__slots__.
<pause>

Class statements are implemented by calling the metaclass 'type' with 3 
args.  Type.__new__ uses the information in those args.  If the namespace 
arg has a __slots__ member, it does something special based on the strings 
in the tuple, but it leaves the tuple alone. 





From jschroed at gmail.com  Thu May  8 21:12:46 2008
From: jschroed at gmail.com (John Schroeder)
Date: Thu, 8 May 2008 18:12:46 -0700
Subject: How can I add spaces where ever I have capital letters?
Message-ID: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com>

I have a string (which I got from the names of my classes) and I would like
to print out my CamelCase classes as titles.

I would like it to do this:

>>> my_class_name = "ModeCommand"
## Do some magic here
>>> my_class_name
'Mode Command'

Anyone know any easy way to do this?  Thanks.
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From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 06:43:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 12:43:15 +0200
Subject: named tuple mutability
In-Reply-To: <87zlqrx4rj.fsf@benfinney.id.au>
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>
	<873aokzgs9.fsf@benfinney.id.au>
	<482be615$0$10798$426a34cc@news.free.fr>
	<87zlqrx4rj.fsf@benfinney.id.au>
Message-ID: <482c13b7$0$6345$426a74cc@news.free.fr>

Ben Finney a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
> 
>> May we agree to disagree here - unless we don't ?
> 
> Absolutely not, except where not applicable.
> 

and vice versa.


From sturlamolden at yahoo.no  Thu May 22 19:05:28 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 22 May 2008 16:05:28 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <191135ea-c116-4c40-8f9d-72b6e7c8d2fc@s50g2000hsb.googlegroups.com>

On May 22, 6:14 pm, cm_gui <cmg... at gmail.com> wrote:

> I've yet to see a web application written in Python which is really
> fast.

I bet you have a slow dial-up connection.




From castironpi at gmail.com  Tue May 20 09:28:51 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:28:51 -0700 (PDT)
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
Message-ID: <37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>

On May 20, 8:19?am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> #!/usr/bin/python
>
> #why doesn't this run both threads simultaneously?
> #Thanks for any help.
> #Chuckk
>
> import threading
> import time
>
> def printesc(thrd):
> ? ? for i in range(10):
> ? ? ? ? time.sleep(1)
> ? ? ? ? print thrd, i
>
> def master():
> ? ? thd1 = threading.Thread(target=printesc, args=(1,))
> ? ? thd2 = threading.Thread(target=printesc, args=(2,))
> ? ? thd1.run()
> ? ? thd2.run()
>
> master()

You meant 'thd1.start( )' and 'thd2.start( )'.


From castironpi at gmail.com  Tue May 13 11:41:26 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:41:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<7803a03b-c626-4573-b859-6611229cb622@a70g2000hsh.googlegroups.com>
Message-ID: <1925c560-13fe-4b40-80e6-8ef036562547@56g2000hsm.googlegroups.com>

On May 13, 10:35?am, castiro... at gmail.com wrote:
> On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
> wrote:
>
>
>
>
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.
>
> > Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > (and even less per individual for site licenses), which is less than
> > the cost of just one book on Python.
>
> > I think that many people will find that Flaming Thunder is easier to
> > use and understand than Python -- so for many people the amount of
> > time they save will be worth more than the cost of Flaming Thunder
> > (unless, of course, their time is worth $0).
>
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> > But the future is one of the hardest things to predict, so we'll see.
>
> > On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
> > > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > > Don't let yourself be irritated by castironpi
>
> > > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > > interaction.
>
> > > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > > castironpi is that he uses a chatterbot to clutter up the threads
> > > > here. ?If you go back to his postings from a year ago (and selected
> > > > ones since), his comments are coherent and sensible. ?These rambling
> > > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > > his idea of a joke. ?But they are certainly not worth your time in
> > > > trying to respond to them.
>
> > > > -- Paul
>
> > > ?I don't think castironpi so annoying that I should filter its
> > > messages. It would be enough if he were better tuned. He is much
> > > smarter than the emacs shrink, for example. :-P
>
> > > ?The "Flaming Thunder" looks promising, but without being free
> > > software, it's unlikely it will create a large developer community,
> > > specially considering both free general purpose and scientific
> > > programming languages.- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -
>
> Flaming Thunder, the lightning one, looked like [ 255, 210, 255 ], but
> the next thing I thought was -40 on green.- Hide quoted text -
>
> - Show quoted text -

Now get this:  I am talking to someone.  #define someone now.


From upton at virginia.edu  Tue May 13 14:08:25 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 14:08:25 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>
Message-ID: <5504f9ac0805131108qeb27176rf6c80a00b1e34570@mail.gmail.com>

On Tue, May 13, 2008 at 1:58 PM, Matthieu Brucher
<matthieu.brucher at gmail.com> wrote:
>
> > Perhaps.  But if elementary school students can easily understand why
> > one programming language gives the answer 100 (Flaming Thunder):
> >
> >  Write 10^2.
> >
> > but can't understand why another programming language gives the answer
> > 8 (Python):
> >
> >  Print 10^2
> >
> > then I think the comparison moves beyond a matter of taste into the
> > realm of measurable ease-of-use.
> >
>
> Well...
>
> >>> 10**2
> 100
>
> Why ^ ? There is no good reason why use ^ over ** and vice versa, so what
> you try to prove is not with your example.
>

Actually, I'm a fan of ^ over ** for exponentiation, because it's a
good visual cue for "raising."  (What if in LaTeX you had to write
$x**{y}$? :p)   Meanwhile, I don't see what ^ has to do with the
regular XOR symbol.

On the other hand, I don't really go for arguments that language x is
better than language y because there are fewer things you have to tell
new students to just accept as something you have to do.  (ie, sure,
teach Python over C or Java because it will take them less /time/ to
write hello world, but don't say "python is better because you don't
have to tell the students 'just accept you have to #include <stdio.h>,
and you have to int main(), and you have to printf instead of print")


From tjreedy at udel.edu  Thu May  8 16:42:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 16:42:10 -0400
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
	<ad2861dc-d9fd-4ad4-aa3d-1e401e581cab@b9g2000prh.googlegroups.com>
Message-ID: <fvvoiv$vvb$1@ger.gmane.org>


"Miki" <miki.tebeka at gmail.com> wrote in message 
news:ad2861dc-d9fd-4ad4-aa3d-1e401e581cab at b9g2000prh.googlegroups.com...
Hello,

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
> # How do I do the following line?
> if key not in second_dict or if it is, but has has the wrong value,
> then let me know

Does this work for you?

for key,value in second_dict.iteritems():
  try:
    if first_dict[key(1)] == value:
        return True
    else:
        return False:
  except KeyError:
        return False

tjr 





From ivan.illarionov at gmail.com  Tue May 20 05:18:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 09:18:32 +0000 (UTC)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
	<mailman.1267.1211002421.12834.python-list@python.org>
	<g0m9or$2qk0$1@news.mtu.ru>
	<10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>
Message-ID: <g0u518$1fec$4@news.mtu.ru>

On Mon, 19 May 2008 13:53:31 -0700, bruno.desthuilliers at gmail.com wrote:

> On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>> On Sat, 17 May 2008 02:33:13 -0300, Gabriel Genellina wrote:
>> > En Sat, 17 May 2008 01:01:50 -0300, Ivan Illarionov
>> > <ivan.illario... at gmail.com> escribi?:
>>
>> >> After re-reading "Python is not Java" I finally came to conclusion
>> >> that classmethods in Python are a very Bad Thing.
>>
>> >> I can't see any use-case of them that couldn't be re-written more
>> >> clearly with methods of metaclass or plain functions.
>>
>> > A good use case for class methods are alternate constructors, like
>> > dict.from_keys. I don't think an alternate constructor would be more
>> > clear being a method of the metaclass - actually it belongs to the
>> > class itself, not to its metaclass.
>> > Metaclass methods are harder to find; they don't show in
>> > dir(instance) nor dir(class).
>> > Also the resolution order is harder to grasp for metaclasses - but
>> > this may be just lack of usage from my part...
>>
>> >> They have the following issues:
>> >> 1. You mix instance-level and class-level functionality in one place
>> >> making your code a mess.
>>
>> > Not necesarily; some classmethods are naturally tied to the class
>> > itself, not to the metaclass (like the constructor example above).
>> > But yes, *some* classmethods could be written as methods of their
>> > metaclass instead - but that doesn't always make sense.
>>
>> >> 2. They are slower than metaclass methods or plain functions.
>>
>> > Hu? How did you come to that?
>> > I've done a small test and a class method wins by a very minuscule
>> > but consistent advantage over a metaclass method:
>>
>> > class A(object):
>> >      color = "red"
>>
>> >      @classmethod
>> >      def foo(cls, x):
>> >          return getattr(cls, x)
>>
>> > class MetaB(type):
>> >      def foo(self, x):
>> >          return getattr(self, x)
>>
>> > class B(object):
>> >      __metaclass__ = MetaB
>> >      color = "red"
>>
>> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
>> > "A.foo('color')"
>> > 1000000 loops, best of 3: 1.19 usec per loop
>>
>> > C:\TEMP>python -m timeit -s "from meta3 import A,B;a,b=A(),B()"
>> > "B.foo('color')"
>> > 1000000 loops, best of 3: 1.2 usec per loop
>>
>> How did I come to this:http://code.djangoproject.com/changeset/7098
>>
>> I measured this and there was a marginal speed increase when
>> classmethods wher moved to metaclass.
> 
> IIRC (please correct me if I'm wrong), this part of code is only called
> when the class is created - in which case it makes sense to move it
> where it belongs, ie to the metaclass. This is by no mean a use case for
> classmethods.

Yes, this is not the use case for class methods, but they where used 
there. The whole point of my post was to say that classmethods are used 
in a wrong way too often and most of Python programmers don't know that 
the same thing can be implemented with metaclass methods.

-- Ivan


From darkwind.87 at gmail.com  Thu May  8 20:30:31 2008
From: darkwind.87 at gmail.com (Dark Wind)
Date: Thu, 8 May 2008 17:30:31 -0700
Subject: Free Memory
Message-ID: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>

Hi,

How can I free all the memory in python by deleting all variables. I am
looking for the equivalent of 'clear' from Matlab.

I know del x deletes a variable x, but it doesn't free all the available
memory.

Thank you
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From luckyluke56 at gmail.com  Sat May 24 09:41:06 2008
From: luckyluke56 at gmail.com (Sh4wn)
Date: Sat, 24 May 2008 06:41:06 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
Message-ID: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>

Hi,

first, python is one of my fav languages, and i'll definitely keep
developing with it. But, there's 1 one thing what I -really- miss:
data hiding. I know member vars are private when you prefix them with
2 underscores, but I hate prefixing my vars, I'd rather add a keyword
before it.

Python advertises himself as a full OOP language, but why does it miss
one of the basic principles of OOP? Will it ever be added to python?

Thanks in advance,
Lucas


From markguildwars1 at hotmail.com  Thu May  8 07:54:58 2008
From: markguildwars1 at hotmail.com (Mark Jordaan)
Date: Thu, 8 May 2008 13:54:58 +0200
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>


pls dont learn it
 
Move on
 
The world is full enough of 9 to 5 coders
 
Mark> From: raxitsheth2000 at gmail.com> Subject: Newbie to python --- why should i learn !> Date: Thu, 8 May 2008 03:25:17 -0700> To: python-list at python.org> > Hi,> > i was reading/learning some hello world program in python.> I think its very simillar to Java/C++/C#. What's different (except> syntax) ?> > what can i do easily with python which is not easy in c++/java !?> > Tnx,> Raxit> www.mykavita.com> --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Tired of having no room left in your inbox? Windows Live Hotmail now gives you 5GB of FREE storage! Get your free Windows Live Hotmail account here!
http://get.live.com/mail/overview
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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 08:27:27 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 14:27:27 +0200
Subject: Python is slow
In-Reply-To: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
Message-ID: <4836b81b$0$24012$426a34cc@news.free.fr>

Carl Banks a ?crit :
(snip technically pedantic correction)
> You know, even though you're technically correct, I'd like to see you
> abandon this little crusade.  At this point it's more noisy than
> helpful.
(snip)

Mmm... You're probably right. I tend to be way too pedantic sometimes. 
OTHO, there are people not even having the slightest clue here - I once 
was - and being corrected on similar things usually helped me. But yes, 
I'll try to refrain myself...


From catphive at catphive.net  Fri May  2 01:27:01 2008
From: catphive at catphive.net (Brendan Miller)
Date: Thu, 1 May 2008 22:27:01 -0700
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
	<8763tx1j5o.fsf@benfinney.id.au>
Message-ID: <ml9u5tx2w10i.ym9gmtkot622$.dlg@40tude.net>

On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:

> URL:http://docs.python.org/lib/module-subprocess.html

Awesome. This is exactly what I was hoping existed.


From duncan.booth at invalid.invalid  Mon May 12 08:04:41 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 12:04:41 GMT
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
Message-ID: <Xns9A9C83F62CA39duncanbooth@127.0.0.1>

Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

>>> is there a better way than my solution? is mine ok?
>> 
>> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>>  or str(i) for i in xrange(1, 101)]
>> 
>> -- Ivan
> 
> or, more correctly, if you actually need to "print":
> 
> sys.stdout.write('\n'.join('%s%s' % 
>     (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
>     or str(i) 
>     for i in xrange(1, 101)))

I think the variant I came up with is a bit clearer:

for i in range(1,101):
	print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i


From michele.simionato at gmail.com  Fri May 23 03:40:19 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 23 May 2008 00:40:19 -0700 (PDT)
Subject: pickle error: can't pickle instancemethod objects
Message-ID: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>

Can somebody explain what's happening with the following script?

$ echo example.py
import pickle

class Example(object):

    def __init__(self, obj, registry):
        self._obj = obj
        self._registry = registry
        for name, func in self._registry.iteritems():
            setattr(self, name, func.__get__(obj, obj.__class__))

    def __gestate__(self): # should skip the bound methods attributes
        return dict(_registry=self._registry, _obj=self._obj)

class C(object):
    pass

def foo(self):
    pass

if __name__ == '__main__':
    ex = Example(C(), dict(foo=foo))
    pickle.dumps(ex)

I get the following traceback:

Traceback (most recent call last):
  File "pickle_error.py", line 22, in <module>
    pickle.dumps(ex)
  File "/usr/lib/python2.5/pickle.py", line 1366, in dumps
    Pickler(file, protocol).dump(obj)
  File "/usr/lib/python2.5/pickle.py", line 224, in dump
    self.save(obj)
  File "/usr/lib/python2.5/pickle.py", line 331, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/python2.5/pickle.py", line 419, in save_reduce
    save(state)
  File "/usr/lib/python2.5/pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.5/pickle.py", line 649, in save_dict
    self._batch_setitems(obj.iteritems())
  File "/usr/lib/python2.5/pickle.py", line 663, in _batch_setitems
    save(v)
  File "/usr/lib/python2.5/pickle.py", line 306, in save
    rv = reduce(self.proto)
  File "/usr/lib/python2.5/copy_reg.py", line 69, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle instancemethod objects

I know that instancemethods cannot be pickled, this is why I
used a __getstate__ method, but apparently it does not work.
Any hint?

           Michele Simionato


From arnodel at googlemail.com  Thu May 22 14:18:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 22 May 2008 19:18:13 +0100
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <m2d4ne6w4a.fsf@googlemail.com>

cm_gui <cmgui2 at gmail.com> writes:

> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

You're slow too. And your mum.  And your car is so slow, it gets
overtaken by slugs.  Whereas I'm really fast, I'll race you to the end
of the street and we'll see who wins.  My mum's fast, my car's got a
super fast noisy exhaust.

So there.

-- 
Arnaud


From max at alcyone.com  Sat May  3 17:20:37 2008
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 May 2008 14:20:37 -0700
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <481CB283.107@gmail.com>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>

Szabolcs Horv?t wrote:

> Arnaud Delobelle wrote:
>>
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
> 
> This occurred to me also, but then I tried
> 
> sum(['abc', 'efg'], '')
> 
> and it did not work.  Or is this just a special exception to prevent the 
>  misuse of sum to join strings?  (As I said, I'm only an occasional user.)

What you wrote is nonsensical there, no different from 'a' + 1 -- which 
is why it quite rightly raises a TypeError.

You're trying to add a list to a string, which is nonsensical.  You add 
strings to strings, or lists to lists, but mixing them up doesn't make 
sense.  Python can't guess what you mean when you write something like 
['abc', 'def'] + '' -- which is the functional equivalent of your call 
to sum -- and so doesn't try.  It indicates this by raising a TypeError.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From clabepa at gmail.com  Thu May 15 12:51:55 2008
From: clabepa at gmail.com (Claudio Driussi)
Date: Thu, 15 May 2008 18:51:55 +0200
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482c6a27$0$22075$6e1ede2f@read.cnntp.org>

Johny ha scritto:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

If your target is Windows, you can try mediator components

http://www.otc.pl/download/

which are COM objects based on xHarbour and which give you
full access to DBF and index.

You need PythonWin too.

I did some tests, if you like i can send you something,
call me in my private mail.

Claudio


From rileyrgdev at gmail.com  Wed May 21 10:27:08 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Wed, 21 May 2008 16:27:08 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<g11128$n1n$2@registered.motzarella.org>
	<48342ff3$0$20826$426a34cc@news.free.fr>
Message-ID: <g11bft$7b4$3@registered.motzarella.org>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Richard G Riley a ?crit :
>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
>
> (snip)
>
>>> And not that useful - why would one care about the function being
>>> defined in class X or Y when one have the exact file and line ?
>>
>> Very obvious I would think. One can develop ones own interactive class
>> browser and code navigator.
>
> From the traceback ?
>
>>  One can not bring up class help from "line 3
>> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
>> the class name I can navigate directly to all sorts of class related
>> information without the need to delve into a physical usage of it e.g
>> program.py at line 3.
>
> Please bear with me, but I'm afraid I still don't get the point : I
> don't need tracebacks to get to some object's info (help etc).

This is a view quite common to people when they are happy with what they
have. Some like to improve what they have. It is immediately apparent to
me why having a class name and method name in the traceback would be
immediately useful. Having written a few extensions to IDEs in the past
I know it would help me, and I suspect, the original poster. As a recent
"recruit" to Python I am quite surprised as how poor most of the query
like tools in the python shell are. The first thing I did was to move to
iPython. Still, horses for courses.




From pupeno at pupeno.com  Sat May 17 04:37:49 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Sat, 17 May 2008 01:37:49 -0700 (PDT)
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
	<mailman.1265.1210987210.12834.python-list@python.org>
Message-ID: <6af73a72-1a0c-40c4-8bc0-58c41e75fc4c@d45g2000hsc.googlegroups.com>

On May 17, 2:19?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pup... at pupeno.com> ?
> escribi?:
>
>
>
> > Hello,
>
> > I have an XML file that starts with:
>
> > <vortaro>
> > <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> > <kap>
> > ? <ofc>*</ofc>-<rad>a</rad>
> > </kap>
>
> > out of it, I'd like to extract something like (I'm just showing one
> > structure, any structure as long as all data is there is fine):
>
> > [("ofc", "*"), "-", ("rad", "a")]
>
> > How can I do it? I managed to get the content of boths tags and the
> > text up to the first tag ("\n ? "), but not the - (and in other XML
> > files, there's more text outside the elements).
>
> Look for the "tail" attribute.

That gives me the last part, but not the one in the middle:

In : etree.tounicode(e)
Out: u'<kap>\n  <ofc>*</ofc>-<rad>a</rad>\n</kap>\n'

In : e.text
Out: '\n  '

In : e.tail
Out: '\n'

Thanks.


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:53:34 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:53:34 -0300
Subject: POP connection timeout.
References: <4822F105.5050505@gmail.com>
Message-ID: <op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 08 May 2008 09:24:37 -0300, Aspersieman <aspersieman at gmail.com> escribi?:

> I have written an application that queries a POP mailbox and
> downloads messages. When the application tries to connect to the mail
> server, but takes too long (eg. longer than 60 seconds) I want to have
> it time out.
>
> Something like
>
> try:
>    pop = poplib.POP3(POPHOST, POPPORT)
> except someerror, err:
>    print "Connecting to mail box has timed out:\n", err
>
> I know that in python 2.5 I could pass an additional timeout parameter
> to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT,
> TIMEOUTINSECONDS), but I am using python 2.4.

Use socket.setdefaulttimeout(timeout_in_seconds) before you create the POP3 object; this value will be used by the initial connect. Once it is connected, you can set a different timeout for retrieving mail using pop.sock.settimeout(...)
Note that setdefaulttimeout applies to ALL subsequent socket operations, not only using poplib.
<http://docs.python.org/lib/socket-objects.html>

-- 
Gabriel Genellina



From grante at visi.com  Fri May  2 11:27:14 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 May 2008 10:27:14 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
	<mailman.460.1209740819.12834.python-list@python.org>
Message-ID: <A72dnRnGiotPr4bVnZ2dnUVZ_qTinZ2d@visi>

On 2008-05-02, D'Arcy J.M. Cain <darcy at druid.net> wrote:
> On Sat, 03 May 2008 00:44:00 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
>> > As someone else pointed out, not all the world is Linux.
>> 
>> It's a good thing I've never implied such to be the case.
>
> You haven't *said* it but you have definitely *implied* it.
> Installing Python in /usr/bin is not common.

It is common.  That's where it's installed by almost all Linux
distributions.

> It is very specific to your system.

Are you claiming that Linux is not a "common" Unix-like OS?

-- 
Grant



From rhamph at gmail.com  Thu May 29 13:25:06 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Thu, 29 May 2008 10:25:06 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <fddf912f-e672-4a55-bbae-c2d4c0aebaf7@t12g2000prg.googlegroups.com>

On May 28, 1:14 pm, rsoh.woodho... at googlemail.com wrote:
> Hi,
>
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
>
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
>
> import threading
> class TestThread(threading.Thread):
>
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
>
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
>
> # end of sample script
>
> Now if I run this using:
>
> $ python ThreadTest.py
>
> then it behaves as expected, ie an output like:
>
> start
> finish
> 0
> 1
> 2
> ...
>
> But if I run it as follows (how the inherited code was started):
>
> $ python -c "import TestThread"
>
> then I just get:
>
> start
>
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

For reasons I haven't figured out, child threads always acquire the
import lock.  Since the main thread is already in an import, and is
waiting for the child thread to finish, this deadlocks.

"python ThreadTest.py" doesn't deadlock because ThreadTest isn't
loaded as a module - it's loaded as a script.  A script doesn't hold
the import lock while it executes.

The solution is to move all the thread spawning and whatnot into a
main() function, use the "if __name__ == '__main__': main()" trick for
when you are a script, and if a module require the caller to do
ThreadTest.main() after importing.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:40:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:40:11 -0300
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua1ek9jpx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 06:45:40 -0300, Michele Simionato <michele.simionato at gmail.com> escribi?:
> On May 12, 4:28?am, Yves Dorfsman <y... at zioup.com> wrote:
>> there's got to be a better way than:
>>
>> d = time.local()
>> y = d[0]
>> d = d[1]
>
> Uses Python 2.6! ;)
>
> Python 2.6a3 (r26a3:62861, May 12 2008, 11:41:56)
> [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import time
>>>> time.localtime()
> time.struct_time(tm_year=2008, tm_mon=5, tm_mday=12, tm_hour=11,
> tm_min=43, tm_sec=47, tm_wday=0, tm_yday=133, tm_isdst=1)
>>>> t=time.localtime()
>>>> t.tm_year, t.tm_mday
> (2008, 12)

No need of 2.6 - the above code works since Python 2.2 at least:

Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> t=time.localtime()
>>> type(t)
<type 'time.struct_time'>
>>> t.tm_year
2008

(but struct_time objects were printed as regular tuples)

-- 
Gabriel Genellina



From squareswallower at 1ya2hoo3.net  Sat May 17 00:52:59 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Fri, 16 May 2008 22:52:59 -0600
Subject: Markov Analysis Help
Message-ID: <g0lobb$1lu$1@news.xmission.com>

Hi Guys,

I've written a Markov analysis program and would like to get your 
comments on the code  As it stands now the final input comes out as a 
tuple, then list, then tuple.  Something like ('the', 'water') ['us'] 
('we', 'took')..etc...

I'm still learning so I don't know any advanced techniques or methods 
that may have made this easier.


here's the code:

def makelist(f): 	#turn a document into a list
	fin = open(f)
	results = []
	for line in fin:
                line = line.replace('"', '')
		line = line.strip().split()
		for word in line:
			results.append(word)
	return results



def markov(f, preflen=2):	#f is the file to analyze, preflen is prefix length
	convert_file = makelist(f)
	mapdict = {}		#dict where the prefixes will map to suffixes
	start = 0
	end = preflen 		#start/end set the slice size
	for words in convert_file:
		prefix = tuple(convert_file[start:end])     #tuple as mapdict key
		suffix = convert_file[start + 2 : end + 1]  #word as suffix to key
		mapdict[prefix] = mapdict.get(prefix, []) + suffix #append suffixes
		start += 1
		end += 1
	return mapdict



def randsent(f, amt=10):     #prints a random sentence
        analyze = markov(f)
	for i in range(amt):
		rkey = random.choice(analyze.keys())
		print rkey, analyze[rkey],


The book gave a hint  saying to make the prefixes in the dict using:

def shift(prefix, word):
	return prefix[1:] + (word, )

However I can't seem to wrap my head around incorporating that into the 
code above, if you know a method or could point me in the right 
direction (or think that I don't need to use it) please let me know.

Thanks for all your help,

Dave



From zzvladimir at gmail.com  Sun May  4 08:48:03 2008
From: zzvladimir at gmail.com (Vladimir Kropylev)
Date: Sun, 4 May 2008 16:48:03 +0400
Subject: please remove me from this list
Message-ID: <fbe1c7d70805040548g678baeb6h702c392144ffa196@mail.gmail.com>

please remove me from this list, thanks


From zapwireDASHgroups at yahoo.com  Fri May 23 18:44:27 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Fri, 23 May 2008 15:44:27 -0700
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
	<4837225e$0$5507$9b622d9e@news.freenet.de>
Message-ID: <jNHZj.147601$Tj3.61085@en-nntp-02.dc1.easynews.com>

""Martin v. L?wis"" <martin at v.loewis.de> wrote in message 
news:4837225e$0$5507$9b622d9e at news.freenet.de...
> Try all three of them, in sequence:

Thanks, will do.

> If you absolutely don't want to import test, write

I can live with the import, I just don't want to have to type out the full 
names all the time.

---Joel




From __peter__ at web.de  Mon May 19 14:11:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 May 2008 20:11:20 +0200
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
Message-ID: <g0sfs7$cnu$00$1@news.t-online.com>

seanacais wrote:

> I'm trying to build an unknown number of repeating gui elements
> dynamically so I need to store the variables in a list of
> dictionaries.  I understand that  Scale "variable" name needs to  be a
> StringVar  but I cannot figure out how to initialize the dictionary.
> 
> I've tried the following code
> 
> ps = PowerSupply()            # Instantiate a Power Supply VM Object
> numOPs = ps.getOnum()      # Find the number of outputs
> OPValues = []                 # Global list to hold one dictionary per output
> 
> for c in range(numOPs):
> OPValues.append({ })
> ps.initOPValues(c, OPValues[c])
> 
> 
> 
> ps.initOPValues is defined as follows:
> 
> def initOPValues(self, OPname, dname):
> 
> OPDefaults = {
> 'Vval'  : 0,
> 'Ival'  : 0,
> 'Otemp' : 0
> }
> 
> dname = dict((d,StringVar()) for d in OPDefaults)
> for d in OPDefaults:
> dname[d].set(OPDefaults[d])
> 
> I get the following error:
> 
> Traceback (most recent call last):
>   File "C:\Code\gui\tkinter.py", line 165, in <module>
>     ps.initOPValues(c, OPValues[c])
>   File "C:\Code\gui\tkinter.py", line 47, i initOPValues
>     dname = dict((d,StringVar()) for d in OPDefaults)
>   File "C:\Code\gui\tkinter.py", line 47, in <genexpr>
>     dname = dict((d,StringVar()) for d in OPDefaults)
>   File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
>     Variable.__init__(self, master, value, name)
>   File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
>     self._tk = master.tk
> AttributeError: 'NoneType' object has no attribute 'tk'
> Exception exceptions.AttributeError: "StringVar instance has no
> attribute '_tk'"
>  in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
> 0x00B7D468>> ignored
> 
> Any help is appreciated!

There's some magic going on behind the scene which means that you have to
create a Tkinter.Tk instance before you can start churning out StringVars:

>>> import Tkinter as tk
>>> v = tk.StringVar()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 257, in __init__
    Variable.__init__(self, master, value, name)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 188, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
>>> root = tk.Tk()
>>> v = tk.StringVar()
>>> v.set(42)
>>> v.get()
'42'

Peter



From jcd at sdf.lonestar.org  Fri May  9 11:42:14 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 11:42:14 -0400
Subject: python newbie: some surprises
In-Reply-To: <7OZUj.125622$rd2.29080@pd7urf3no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
	<mailman.844.1210314193.12834.python-list@python.org>
	<7OZUj.125622$rd2.29080@pd7urf3no>
Message-ID: <1210347734.3332.36.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-09 at 15:08 +0000, Yves Dorfsman wrote:
> Gabriel Genellina wrote:
> 
> >> I see the point of the OP. Couldn't the new-line be used as an 
> >> equivalent of   ':', for example, do you find this difficult to read:
> >>
> >> if a == 3
> >>    do_something()
> >>
> >>
> >> if a == 3: do_something()
> > 
> > Yes, it could be done, there are no technical reasons to always force to 
> > use ":". But AFAIK the main reasons to keep ":" are internal consistency 
> > (an inner block always starts with ":"; incidentally, that's easier to 
> > handle for editors) and legibility (the ":" stands for itself and has a 
> > meaning)
> 
> Legibility ?
> But one could make the same argument for curly brackets, and we seem to be 
> doing fine without them !
> 
> I have become so used to the power of indenting in python that I keep 
> forgetting the colon, and this is getting worse as I do more python, not 
> better. Maybe I'll write myself a "pre-compiler" that add the colons where 
> the compiler needs them :-)
> 
> 
> Yves.
> http://www.SollerS.ca
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Have you considered the following:

if (x == 4 and (y in 
    [len(x) for x in
    foo if x**2 > 23]
    or y < 2) and z.strip().endswith('z') and
    remove_first(w))
    attach_list(q, r)
    reject(x)

A colon on the correct line would help readability quite a bit.

Yeah, I know I made it pretty ugly to begin with, and there are ways to
improve it without the colon, but still, just because it could be
removed doesn't necessarily mean it should.

Cheers,
Cliff



From notbob at nothome.com  Sun May  4 19:45:52 2008
From: notbob at nothome.com (notbob)
Date: Sun, 04 May 2008 23:45:52 GMT
Subject: Are rank noobs tolerated, here?
Message-ID: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>


I'm trying to learn how to program.  I'm using:
  
How to Think Like a Computer Scientist

Learning with Python
2nd Edition

Am I likely to receive any help, here, or is there another irc, forum, etc,
that might better serve a complete amateur such as myself.  Thnx.

nb


From Lie.1296 at gmail.com  Sun May 25 13:22:21 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:22:21 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <55beb99a-e870-4045-831a-a4cef84fe3dc@t12g2000prg.googlegroups.com>

On May 23, 2:50?pm, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Brad a ?crit :
>
> > cm_gui wrote:
> >> Python is slow.
>
> > It ain't C++, but it ain't a punch card either... somewhere in between.
> > I find it suitable for lots of stuff. I use C++ when performance really
> > matters tho... right tool for the job. Learn a good interpreted language
> > (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.

> 2/ actually, all known Python implementations compile to byte-code.

<flamingmode useofbrain="alotforaflame">
LordHaveMercy(violatingsomeonesTM). Couldn't you understand that a CPU
INTERPRET bytes of instruction, and that means ALL languages is
interpreted in one stages or another, some languages' (implementation)
is translated/compiled into an intermediate language/bytecode like
most Python or C/C++ or Java implementations, some language
implementation interprets the language directly (like Javascript).

The difference between C and Python (in their regular implementation)
is WHO interprets it, most C/C++'s implementation is interpreted
directly by the CPU, all Python's implementation is interpreted by a
VM. Saying a language implementation is interpreted is nonsense as all
languages implementation is interpreted either by a VM or by CPU or an
interpretator, but we do have a semantic agreement that calling a
language interpreted means it is NOT interpreted by the CPU directly,
some minority have their own agreement that a language
(implementation) is interpreted when it is never translated into an
intermediate language/bytecode, you fall into this second group, which
actually uses the wrong terminology but do have some followers. Don't
forget that language is all about what the _consensus_ says, not what
the dictionary says.

Brad doesn't use any terms incorrectly, he stated that Python is
interpreted, which is true, since in all python implementation,
Python's bytecode is interpreted by a VM. He also states that C/C++ is
compiled which is also true as most if not all C++ implementation have
a stage where it is translated into an intermediate language/bytecode.
</flamingmode>


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 10:21:53 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 16:21:53 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <g11128$n1n$2@registered.motzarella.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>	<483406a0$0$10773$426a74cc@news.free.fr>
	<g11128$n1n$2@registered.motzarella.org>
Message-ID: <48342ff3$0$20826$426a34cc@news.free.fr>

Richard G Riley a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

(snip)

>> And not that useful - why would one care about the function being
>> defined in class X or Y when one have the exact file and line ?
> 
> Very obvious I would think. One can develop ones own interactive class
> browser and code navigator.

 From the traceback ?

>  One can not bring up class help from "line 3
> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
> the class name I can navigate directly to all sorts of class related
> information without the need to delve into a physical usage of it e.g
> program.py at line 3.

Please bear with me, but I'm afraid I still don't get the point : I 
don't need tracebacks to get to some object's info (help etc).



From paul at boddie.org.uk  Fri May 23 13:48:13 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 23 May 2008 10:48:13 -0700 (PDT)
Subject: Database Query Contains Old Data
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com> 
	<4836dcfe$0$34544$742ec2ed@news.sonic.net>
Message-ID: <59f4d12d-8454-4c11-8629-3f9d827a8119@e39g2000hsf.googlegroups.com>

On 23 Mai, 17:18, John Nagle <na... at animats.com> wrote:
>
>      Exactly.  Although it seems counterintutive, it's not enough
> to do a COMMIT after UPDATE and INSERT operations.  You also have to
> do a COMMIT after a SELECT if you're going to reuse the database handle
> and do another SELECT.  Otherwise, you reread the same data forever.

You can also do a rollback, as I noted, since the aim is merely to
obtain a new transaction by discarding the current one. Upon
performing a new select using the DB-API such a new transaction will
then be obtained, since the rollback or commit will have ensured that
no transaction is currently open.

If the DB-API exposed the MySQL/PostgreSQL semantics with explicit
transactions (see [1] for pertinent material), then the technique
discussed above would either be superfluous (you might not be using
transactions at all) or more obvious (you would have issued an
explicit "start transaction" or "begin" command), but there are
obviously good arguments for exposing the standard semantics through
the API instead.

>      COMMIT, by the way, is per database handle, so if you have
> multiple database handles, each needs to handle its own COMMIT needs.

That's worth remembering, yes.

Paul

[1] http://www.postgresql.org/docs/8.1/static/sql-start-transaction.html


From stef.mientki at gmail.com  Sat May 24 09:49:19 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 15:49:19 +0200
Subject: Scipy+SQLite crashes... , was:  Re: SQLite import fails sometimes
 ?
In-Reply-To: <48381851$1@news.mel.dft.com.au>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>	<mailman.1523.1211631350.12834.python-list@python.org>
	<48381851$1@news.mel.dft.com.au>
Message-ID: <48381CDF.4090309@gmail.com>

John Machin wrote:
> Stef Mientki wrote:
>
>> I don't know if this matters, but I also use sqlite3 from other than 
>> Python programs.
>
> You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
> Python, and (I guess) you have another instance of sqlite3.dll 
> somewhere else, for use "from other than Python programs". Are they 
> the same version? If not, this may be the problem. Start up your other 
> application, then try to import sqlite3 from Python. If this is the 
> problem, and you must be able to run both apps simultaneously, you 
> will probably need to update one or the other.
>
> Cheers,
> John
> -- 
> http://mail.python.org/mailman/listinfo/python-list
thanks John,

I think I hit the problem, ;-)
but I don't have a solution yet :-(

After creating the simplest program that did work :

 import sqlite3

I started adding every import statement used in my program,
until the program crashed,
and here is the simplest program that crashes:

 from scipy import *
 import sqlite3

Traceback (most recent call last):
  File "D:\Data_Python\P24_PyLab_Works\module1.py", line 2, in <module>
    import sqlite3
  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
    from dbapi2 import *
  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ImportError: DLL load failed: Invalid access to memory location.

Any solutions ?
(btw I need to do the *-import, because I create an easy user 
environment to do math and physics)

thanks,
Stef Mientki



From cjw at ncf.ca  Mon May 12 10:23:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Mon, 12 May 2008 10:23:01 -0400
Subject: Compiling Python using Microsoft Visual C++ 2008
Message-ID: <g09jsd$b2c$1@theodyn.ncf.ca>


1.I have both 2.5 and 2.6 but both 
appear, under Recent Projects, as 
pcbuild.  It would be helpful if the 
Python Version could be indicated.
2.With 2.6, Python compiles and executes 
OK but various packages are not 
compiled, eg sqlite3.
3.Pythonw compiles OK but not sqlite3.
4.Mike Fletcher suggests an approach 
(http://www.vrplumber.com/programming/mstoolkit/) 
with Visual C for Python 2.4.  Is this 
still the recommended way to compile 
Python 2.6?
5.Python 2.5 source refers to an Older 
Visual C.  Automatic conversion to 
Visual C 2008 gives the message ?Some of 
the properties associated with the 
solution could not be read.?  All 
projects except one had a single 
warning, there were no errors reported.
6.After conversion there is no python 
project, it is flagged ?unavailable?.
7.Pythoncore builds with no errors and 6 
warnings but there is no executable.
8.Python 2.5 build _tkinter fails ? 
tcl.h not found.

I would welcom advice on how to proceed.

Colin W.


From inhahe at gmail.com  Thu May 22 18:43:53 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:43:53 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<LymZj.61584$3v1.36344@bignews3.bellsouth.net>
Message-ID: <VFmZj.61588$3v1.40880@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:LymZj.61584$3v1.36344 at bignews3.bellsouth.net...

> crazy = True
> print foo['a',crazy]
>
just to clarify, you could use it like:
crazy = "I'm crazy" #this only has to be done once

print foo['a']          #not crazy
print foo['a',crazy] #crazy

(this may be totally unPythonic, i don't know.)






From ewertman at gmail.com  Wed May 21 12:23:31 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 21 May 2008 12:23:31 -0400
Subject: time module question - time zones
Message-ID: <92da89760805210923w39152f84ic4bb7cf0baa676b8@mail.gmail.com>

I tend to deal with dates a lot in different formats and places...
typically I'll convert them to a time tuple with strptime(), and pass
them around like that before I need to write them back out.

One set of time/dates I'm getting are in UTC, but the string doesn't
say that specifically.  So I do this..  I had expected the outcome to
be offset properly (I'm EST5EDT).  But I'm obviously missing
something:

#!/usr/bin/env python

import time

utc_str = '2008-05-10 03:05:00 UTC'

d = time.strptime(utc_str,'%Y-%m-%d %H:%M:%S %Z')
t = time.mktime(d)

print d
print time.gmtime(t)
print time.localtime(t)

output :

(2008, 5, 10, 3, 5, 0, 5, 131, 0)
(2008, 5, 10, 8, 5, 0, 5, 131, 0)
(2008, 5, 10, 4, 5, 0, 5, 131, 1)


I believe that I should be getting (2008, 5, 9, 23, 5, 0, 5, 130, 1)
out of one of those, since the original 3:05am time was UTC, and my TZ
is currently -4.  Does that make sense?  I didn't even think I needed
to do any business with time.localtime() and time.gmtime().  I
expected  time.strftime() to return the locale appropriate time, but
it didn't.

TIA

Eric


From ivan.illarionov at gmail.com  Fri May 23 06:21:23 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 03:21:23 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
Message-ID: <2235cb81-cc56-404e-978b-35c2b09c976e@34g2000hsh.googlegroups.com>

On 23 ???, 02:20, Brad <b... at 16systems.com> wrote:
> cm_gui wrote:
> > Python is slow.
>
> It ain't C++, but it ain't a punch card either... somewhere in between.
> I find it suitable for lots of stuff. I use C++ when performance really
> matters tho... right tool for the job. Learn a good interpreted language
> (Pyhton) and a good compiled language (C or C++) and you'll be just
> fine. Until then, quit bitching.

  It's wrong. Here's why.

  Compare your statement to:
   "OP:  Humans are weak.
   "Brad:  They ain't gorillas, but they ain't insects either...
somewhere in between."

  Python is *not* in between C++ and something else.  It's far ahead
of them all.  Raw speed is not the most important thing in programming
languages like raw physical strength is not the most important thing
in life.
  Pure Python has less raw speed than most compiled-to-machine-code
languages, but it doesn't matter.  Python can be extended easily and,
most important, Python is smart.

  Ivan


From frederic.degraeve at gmail.com  Wed May 21 06:18:16 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Wed, 21 May 2008 03:18:16 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<bac13dbd-fac5-44e0-9470-17c2b6bc3b16@c65g2000hsa.googlegroups.com>
Message-ID: <c9f51bc2-eee8-4326-a7b6-f89480ecc876@b1g2000hsg.googlegroups.com>

I reply to myself!

>
> Boost.Python is also very known (but never tested by myself).
>

http://www.boost.org/doc/libs/1_35_0/libs/python/doc/tutorial/doc/html/index.html
here the example. I know that it has been made to simplify the
CPython's use and this is based on CPython.

Fr?d?ric


From python at bdurham.com  Sat May 17 16:23:55 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sat, 17 May 2008 16:23:55 -0400
Subject: multiple databases, what's the best interface ?
Message-ID: <1211055835.3828.1253706593@webmail.messagingengine.com>

Stef,

Take a look at what the dabo team has put together.

http://dabodev.com

Malcolm


From rossgk at gmail.com  Wed May 28 13:38:53 2008
From: rossgk at gmail.com (RossGK)
Date: Wed, 28 May 2008 10:38:53 -0700 (PDT)
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
	<2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>
Message-ID: <1057dae0-43dd-477a-b686-5f79d0627161@27g2000hsf.googlegroups.com>


I've answered my own question about the "None" state - an event was
setting the thread to None where I didn't expect it.

However, my question slightly repositioned is if a Thread is "Stopped"
it still seems to exist. Is there someway to make it go away, send it
to garbage collection etc?

Other part of the original Q - I assume a Stopped thread gets a false
from "isAlive" and a Running thread gets a true?



From kyrie at uh.cu  Fri May  9 00:15:36 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 09 May 2008 00:15:36 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <48239601.1070200@cheimes.de>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
Message-ID: <1210306536.4823cfe8be627@comuh.uh.cu>


Quoting Christian Heimes <lists at cheimes.de>:

> Luis Zarrabeitia schrieb:
> >>>> 0**0
> > 1
> > 
> > That 0^0 should be a nan or exception, I guess, but not 1.
> 
> No, that's correct for floats. Read the wikipedia article or the C99
> standard for more information.

Weird, I can't find neither... (which wikipedia article? Couldn't find one about
C99.)
Don't take me wrong, I believe you... but I would really want to see the logic
behind that. I pretty much like the NaNs and Infs (and don't really understand
why python raises float division errors instead of them), but to have errors
pass with absolute silence seems dangerous even if it is useful sometimes
(Vandermonde example). I think I'd rather have python returning NaNs and
violating C99 on the 0**0=1, than to have 0**0=1 and not return NaNs.


-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie
--
"Al mundo nuevo corresponde la Universidad nueva"
UNIVERSIDAD DE LA HABANA
280 aniversario 


From zanwer at gmail.com  Thu May 22 05:39:24 2008
From: zanwer at gmail.com (Zaid Anwer)
Date: Thu, 22 May 2008 10:39:24 +0100
Subject: Sort contents of a file By date
Message-ID: <88002d8e0805220239w118c79c4rd026b5b857e642c9@mail.gmail.com>

Hi,

I have a query :-

Is there any command or link that could help me to sort the content of a
file by date.

File has couple of thousands lines every line starts with
timestamp(Date,Time) and then Log information.

It has some duplicate lines as well that has only timestamps same, I want to
remove the duplicate lines that has same time stamps.

Thanks in advance.
Regards,
Zee
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From pball.benetech at gmail.com  Mon May 26 17:23:40 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Mon, 26 May 2008 14:23:40 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
Message-ID: <98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>

I used Arnaud's suggestion with a few minor tweaks, as follows:

#-----
fset = frozenset
s0 = fset([1])
s1 = fset([1,2])
s2 = fset([2])

# let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)
S = set([s1,s2])

# X is the "domain", C is the set of complements in X of elements of
S
X = set()
for s in S:
    X |= s
print "s0 is ", s0
print "S is ", S
print "X is ", X

C = set(fset(X - s) for s in S if fset(X-s))
print "C is ", C

# Find the "fibers" at each element x of s0.
# A fiber at x is the set of all s in S or C that contain x
from collections import defaultdict
fibers = defaultdict(list)
for s in S | C:
    for x in s & s0:
        fibers[x].append(s)
print "fibers are ", fibers

# Find the "seeds" at each x in s0.
# A seed at x is the set of all elements contained in all s in the
fiber at x.
# Intutively, a seed at x is the smallest set containing x that can
be
# built from S
seeds = set()
for F in fibers.itervalues():
    seeds &= set(F)
print 'seeds are ', seeds

# Now we know if there is a solution:
sol = set()
for s in seeds:
    sol |= s
if sol != s0:
    print "No solution"
else:
    print "Solution: union(intersection(fibers[x]) for x in s0)"
#-----

yields this:

s0 is frozenset([1])
S is  set([frozenset([1, 2]), frozenset([2])])
X is  set([1, 2])
C is  set([frozenset([1])])
fibers are  defaultdict(<type 'list'>, {1: [frozenset([1, 2]),
frozenset([1])]})
seeds are  set([])
No solution


I follow your logic up to the point of the "seeds," where I get a bit
confused. Thanks much! for the idea, I'm going to keep thinking about
it. Any other ideas are *most* welcome. -- PB.




From tjreedy at udel.edu  Wed May  7 15:10:26 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 7 May 2008 15:10:26 -0400
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org><bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com><fvsaoa$g46$1@aioe.org>
	<68dp9jF2sko92U1@mid.uni-berlin.de><fvsbgf$mev$1@aioe.org><1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
Message-ID: <fvsur0$78q$1@ger.gmane.org>


"pistacchio" <pistacchio at gmail.com> wrote in message 
news:fvsdlh$8l3$1 at aioe.org...

| well, it doesn't matter if it's a single file or a package, but it
| _does_ matter if you have to put them under the path where python is
| installed because, in a typical shared web hosting environment (such the
| one that i use) you don't have access to system directories.

When you do an import, the *first* place the interpreter looks is the 
*current* directory, which usually is the directory containing the main 
file.  That is because the first entry in sys.path is ''.  So put 
'template.py' in the same directory as my_web_code.py.  If necessary, one 
can add an entry to the beginning of sys.path.

No need to touch the site-packages directory.  The only reason to put 
something there is to make modules available to any code in any directory 
without putting a copy in each directory containing python files.

tjr






From tjreedy at udel.edu  Wed May 21 15:38:27 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 15:38:27 -0400
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com><mailman.1385.1211299351.12834.python-list@python.org>
	<9d9dadfe-3f91-44a6-8b1b-50fe8003046d@e39g2000hsf.googlegroups.com>
Message-ID: <g11tng$n40$1@ger.gmane.org>


"Paul Hankin" <paul.hankin at gmail.com> wrote in message 
news:9d9dadfe-3f91-44a6-8b1b-50fe8003046d at e39g2000hsf.googlegroups.com...
On May 20, 5:02 pm, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'

|def cleanup(s):
|    return filter(lambda x: x not in ' -', s)

Or
>>> s='8 58-2155-58'
>>> t=str.maketrans('','',' -')
>>> s.translate(t)
'858215558'






From ivan.illarionov at gmail.com  Thu May  1 13:30:49 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 17:30:49 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
Message-ID: <fvcuo9$31i9$2@news.mtu.ru>

On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:

> On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
>> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> > IMO .ini-like config files are from the stone age. The modern
>> > approach is to use YAML (http://www.yaml.org).
>>
>> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and
>> so comprehensively and completely fails to achieve its stated main goal
>> of being "readable by humans", that I had assumed it was an April Fool
>> along the lines of Intercal or brainf***.
> 
> 
> YAML, ISTM, took a simple concept that worked for small, straightforward
> data, and tried to make into a format that could anything anywhere, with
> disastrous results.  It's not unlike Perl in this regard.  It's quite
> ridiculous.
> 
> 
> My recommendation to the OP would be:
> 
> If you intend to write a GUI that completely sets all the options, use
> XML.  You can bet there are some users who would prefer text editing
> options files, and XML, while not the most readable format available, at
> least gives users the option.
> 
> If you don't intend to write a GUI to do that, write a simple text file
> parser (if the options are simple), use ConfigParser, or use a Python
> file that you exec.
> 
> Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> ApplicationData/Appname/config.ext on Windows.  I don't recommend using
> the Windows registry to store options; use it to modify Windows behavior
> (like file associations) but keep your own program's options in your own
> file.
> 
> 
> Carl Banks

If you don't like YAML, use JSON or something similar -- XML is overkill 
and .INI is too limited.

-- 
Ivan


From alokkat at gmail.com  Mon May  5 16:00:35 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Mon, 5 May 2008 16:00:35 -0400
Subject: Python Minidom Help
Message-ID: <e3a81e680805051300x1ef9bc2axd0e2420a12a3cd89@mail.gmail.com>

Hi,

I am reading a XML data from  HTTP server and giving it to parse method.

dom = parse(dataread)

It throws following error

  File "/usr/lib/python2.3/site-packages/_xmlplus/dom/minidom.py", line
1908, in parse
    return expatbuilder.parse(file)
  File "/usr/lib/python2.3/site-packages/_xmlplus/dom/expatbuilder.py", line
922, in parse
    fp = open(file, 'rb')

Can anyone please help?

Regards
Alok Kumar
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From ivan.illarionov at gmail.com  Thu May  1 18:26:19 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 22:26:19 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
Message-ID: <fvdg2b$3ep$1@news.mtu.ru>

On Thu, 01 May 2008 23:03:38 +0200, Torsten Bronger wrote:

> Hall?chen!
> 
> Ivan Illarionov writes:
> 
>> [...]
>>
>> I took the example from
>> http://www.kuro5hin.org/story/2004/10/29/14225/062 I haven't use my own
>> example only because I don't have one at hand right now. YAML, in its
>> simple form, definetely makes me more productive. I wasted too much
>> time with XML in the past and I won't ever use it as a serialization or
>> config/settings format again. .INI/ConfigParser is too limited and has
>> no standards. I just don't see anything better than YAML to do human
>> and Python editable config files and to serialize information for later
>> use.
> 
> Okay, but serialisation is something completely different.  Nobody would
> use INI files for it.
> 
> For other things, it simply depends on the use case.  For example, I
> *know* that the configuration files of my pet project will not exceed
> the dumb section.key=value scheme so anything else would be overkill.
> 
> Besides, YAML adds another dependency.
> 
> Tsch?,
> Torsten.

For me it looks more like an old-school/new-school thing than use-case 
thing. I may be wrong, but I see more and more new projects use things 
like reST and YAML/JSON and it feels like they are gradually replacing 
traditional old-school solutions.

And I've got very strong impression that YAML is a the future of 
configuration files when Google released their App Engine.

Of course I may be wrong and it's just my opinion.

-- 
Ivan



From gagsl-py2 at yahoo.com.ar  Fri May 16 21:19:49 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 22:19:49 -0300
Subject: Getting elements and text with lxml
References: <b346932e-0534-442a-a51f-e5cc4d49346c@f36g2000hsa.googlegroups.com>
Message-ID: <op.ua9xzbirx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 18:53:03 -0300, J. Pablo Fern?ndez <pupeno at pupeno.com>  
escribi?:

> Hello,
>
> I have an XML file that starts with:
>
> <vortaro>
> <art mrk="$Id: a.xml,v 1.10 2007/09/11 16:30:20 revo Exp $">
> <kap>
>   <ofc>*</ofc>-<rad>a</rad>
> </kap>
>
> out of it, I'd like to extract something like (I'm just showing one
> structure, any structure as long as all data is there is fine):
>
> [("ofc", "*"), "-", ("rad", "a")]
>
> How can I do it? I managed to get the content of boths tags and the
> text up to the first tag ("\n   "), but not the - (and in other XML
> files, there's more text outside the elements).

Look for the "tail" attribute.

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Sat May 24 21:34:01 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 11:34:01 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<mailman.1535.1211656500.12834.python-list@python.org>
	<roy-73D0E0.18160424052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <87mymf9ng6.fsf@benfinney.id.au>

Roy Smith <roy at panix.com> writes:

> But, you are right, there are certainly cases which are difficult or
> impossible to test for. TDD is a very powerful tool, but it's just
> that: a tool. It's not a magic wand.
> 
> My suggestion is to make using TDD a habit, but don't turn it into a
> religion. You will undoubtedly find places where it's just the wrong
> tool.

All true.

I find it best to remember that the tests discussed in Behaviour
Driven Development are always *unit* tests: they test one small,
isolated unit of the application code, to ensure its behaviour is
correct given specific environment and inputs.

The cases where unit tests are not applicable include anything where
we want to assert behaviour of the entire application: performance
tests, acceptance tests, stress tests, etc.

Unit tests get a lot of discussion time simply because "test the
entire running application" isn't something many programmers will
disagree with, so they don't end up discussing it much. That doesn't
make unit tests *more* important; but it does mean more time is spent
convincing people that unit tests are *at least as* important as the
other tests.

> Don't let the fact that it can't do everything keep you from using
> it when it makes sense.

Yes.

-- 
 \        "Don't worry about people stealing your ideas. If your ideas |
  `\    are any good, you'll have to ram them down people's throats."  |
_o__)                                                  -- Howard Aiken |
Ben Finney


From python at bdurham.com  Sun May 18 14:20:11 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sun, 18 May 2008 14:20:11 -0400
Subject: Fwd: Re: [jcd@sdf.lonestar.org: Re: Compress a string]
Message-ID: <1211134811.29288.1253796369@webmail.messagingengine.com>

> I'm trying to compress a string.
> E.g:
>
>  "AAAABBBC" -> "ABC"

Doesn't preserve order, but insures uniqueness:

line = "AAAABBBC"
print ''.join( set( line ) )

Malcolm


From google at mrabarnett.plus.com  Fri May 23 22:23:35 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 23 May 2008 19:23:35 -0700 (PDT)
Subject: would this be called bug?
References: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>
Message-ID: <1644b511-b376-46c2-a8b4-780a08e2856f@34g2000hsh.googlegroups.com>

On May 24, 1:33 am, Amit Gupta <emaila... at gmail.com> wrote:
> The code is attached below. Basically I am taking a substring of
> variable m, and using "buffer" instead of slicing.
>
> However, the application of int on that buffer start correctly from
> the offset, but it scans all the way to the end, instead of stopping
> at the length of the buffer.
>
> It works however, if I apply str function to output of buffer
> function.
>
> -A
>
> (Pdb) m = "AA1234AA"
> (Pdb) x = buffer(m, 2, 4)
> (Pdb) x
> <read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
> (Pdb) int(x)
> *** ValueError: invalid literal for int() with base 10: '1234AA'
> (Pdb) m = "AA1234AA"
> (Pdb) m = "AA1234"
> (Pdb) x = buffer(m, 2, 4)
> (Pdb) int(x)
> 1234
> (Pdb)

Interestingly, if I try:

int(x, 10)

I get:

Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    int(x, 10)
TypeError: int() can't convert non-string with explicit base

Perhaps int(x) should also be complaining that x isn't a string.


From martin at v.loewis.de  Mon May 12 10:36:15 2008
From: martin at v.loewis.de (=?windows-1252?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 16:36:15 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09jsd$b2c$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
Message-ID: <482855df$0$14196$9b622d9e@news.freenet.de>

> 1.I have both 2.5 and 2.6 but both appear, under Recent Projects, as
> pcbuild.  It would be helpful if the Python Version could be indicated.

Hover over the link, and it will display the full path, which you can
then infer to reason about the specific copy of Python you are using.

In any case, compiling Python 2.5 with VS 2008 is not supported.

> 2.With 2.6, Python compiles and executes OK but various packages are not
> compiled, eg sqlite3.

See PCbuild/readme.txt.

> 3.Pythonw compiles OK but not sqlite3.

So what's the error?

> 4.Mike Fletcher suggests an approach
> (http://www.vrplumber.com/programming/mstoolkit/) with Visual C for
> Python 2.4.  Is this still the recommended way to compile Python 2.6?

No. Either use the full product, or the express edition. Neither
requires and additional setup.

> 5.Python 2.5 source refers to an Older Visual C.  Automatic conversion
> to Visual C 2008 gives the message ?Some of the properties associated
> with the solution could not be read.?  All projects except one had a
> single warning, there were no errors reported.
> 6.After conversion there is no python project, it is flagged ?unavailable?.

See above. This procedure is not supported; you are on your own.
Get a copy of VS 2003 if you want to follow the official
recommendations.

> 7.Pythoncore builds with no errors and 6 warnings but there is no
> executable.
> 8.Python 2.5 build _tkinter fails ? tcl.h not found.

See PCbuild/readme.txt.

Regards,
Martin


From inhahe at gmail.com  Sun May 18 17:35:54 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 17:35:54 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <vi1Yj.144433$Er2.142300@bignews6.bellsouth.net>

i see lots of neat one-liner solutions but just for the sake of argument:

def compress_str(str):
     new_str = ""
     lc = ""
     for c in str:
        if c != lc: new_str.append(c)
     return new_str


"Matt Porter" <mabbikeel at gmail.com> wrote in message 
news:mailman.1315.1211133997.12834.python-list at python.org...
> Hi guys,
>
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"
>
> The code I have so far feels like it could be made clearer and more 
> succinct, but a solution is currently escaping me.
>
>
>
>
> Cheers
> Matt
> -- 
> --
> 




From dmitrey.kroshko at scipy.org  Fri May  9 06:25:12 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:25:12 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
Message-ID: <ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>

Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
(preferable) 2.3 compatible.
Are there other solutions?
D.

On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > and
> > list2 = [0, 2, 4] # integer elements
>
> > howto (I mean most simple recipe, of course) form list3 that contains
> > elements from list1 with indexes from list2, i.e.
>
> list3 = [list1[i] for i in list2]
>
> --
> Paul Hankin



From lew at lewscanon.com  Thu May 15 01:04:30 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 15 May 2008 01:04:30 -0400
Subject: generate all possible math expr of one term
In-Reply-To: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
References: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>
Message-ID: <W5udnbDVHPXCWbbVnZ2dnUVZ_qninZ2d@comcast.com>

xahlee at gmail.com wrote:
>  ?Xah Lee, 2005

Blah, blah, blah.  Plonk.

-- 
Lew


From paddy3118 at googlemail.com  Fri May  9 13:30:24 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 9 May 2008 10:30:24 -0700 (PDT)
Subject: Wanted: Citation supporting Duck Typing
Message-ID: <2385391e-f550-43be-b52e-cc23ba4f5381@d45g2000hsc.googlegroups.com>

Hi,
The wikipedia article on Duck Typing has this criticism section that
needs a citation:
(Fron: http://en.wikipedia.org/wiki/Duck_typing#Criticism)

An often cited criticism is this:
    One issue with duck typing is that it forces the programmer to
have a much wider understanding of the code he or she is working with
at any given time. In a strongly and statically typed language that
uses type hierarchies and parameter type checking, it's much harder to
supply an unexpected object type to a class. For instance, in python,
you could easily create a class called Wine, which expects a class
implementing the "press" method as an ingredient. However, a class
called Trousers might also implement the press() method. With Duck
Typing, in order to prevent strange, hard to detect errors, the coder
needs to be aware of each potential use of the method "press", even
when it's conceptually unrelated to what he or she is working on. With
type checking and hierarchical type declarations, all wine ingredients
would be subclasses of WineIngredient or something like that, negating
the problem.

    In essence, the problem is that, "if it walks like a duck and
quacks like a duck", it could be a dragon doing a duck impersonation.
You may not always want to let dragons into a pond, even if they can
impersonate a duck.

In practice, the issue is equivalent to not mixing dissimilar objects
for duck-typing and is handled almost transparently as part of the
knowledge of the codebase required to maintain it.[citation needed]


I've only found this so far as a citation:
  http://jessenoller.com/2007/05/30/typeducking-on-duck-vs-static-typing/
Whilst it is good, do you know any other work that refutes the
criticism?

(I, and many others don't see the problem, but who has written about
it).

Thanks, Paddy.


From s0suk3 at gmail.com  Thu May  8 04:38:30 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 8 May 2008 01:38:30 -0700 (PDT)
Subject: How to gather information about the system hardware?
References: <mailman.736.1210230874.12834.python-list@python.org>
Message-ID: <d207dd7d-bb08-481d-88cc-ae12e4a37cf8@a70g2000hsh.googlegroups.com>

On May 8, 2:14 am, "Florencio Cano" <florencio.c... at gmail.com> wrote:
> Hi,
> I'm looking for a method of gathering information about the system
> hardware and software installed using Python. I would like to do it in
> UNIX and in Windows. I think that it would be good in Windows to look
> in the registry and be able to parse and search it. Any pointer to
> information would be appreciated.
> Thanks.


The 'platform' module gives a lot of information about the hardware
and OS. To access the Windows Registry, you can use the '_winreg'
module.


From sachin.vijayan80 at gmail.com  Fri May 30 04:24:47 2008
From: sachin.vijayan80 at gmail.com (sachin.vijayan80 at gmail.com)
Date: Fri, 30 May 2008 01:24:47 -0700 (PDT)
Subject: free computer studies
Message-ID: <34ffa522-edf1-47fb-beed-9ca4516a77ac@x19g2000prg.googlegroups.com>

free computer studies
free computer programmes
free computer education
http://foodplantss.blogspot.com/


From robbie at fordpinto.com  Sat May 24 17:18:35 2008
From: robbie at fordpinto.com (Robbie)
Date: Sat, 24 May 2008 14:18:35 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
Message-ID: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>

Hello All,

Hopefully this is an easy question: I'd like to use a .pth file on my
Macintosh so that I can easily import modules that I've created in my
own working directory. I've created a file called Robbie.pth. It
includes a single line:
     /Robbie/PythonWork

I can't seem to figure out where to put this file so that Python will
recognize it when I start it up. I know that the path is correct
because if I do the command sys.path.append('/Robbie/PythonWork') then
everything works as expected. I just don't want to have to execute
this command every time I start Python.

I've looked at what's in sys.path, and have tried putting the file in
various of the directories listed, to no avail. I've also tried
putting it in the same directory where IDLE is (/Applications/
MacPython 2.5) and that doesn't work either.

What am I missing?

FYI I'm running MaxOS 10.4.8 and Python 2.5,

Thank you in advance for the help.

-Robbie


From mccredie at gmail.com  Mon May 12 12:29:09 2008
From: mccredie at gmail.com (Matimus)
Date: Mon, 12 May 2008 09:29:09 -0700 (PDT)
Subject: passing *args "recursively"
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <91793037-bfaf-4d63-b19d-e7be5731481a@x19g2000prg.googlegroups.com>

On May 12, 9:19 am, Guillermo <guillermo.lis... at googlemail.com> wrote:
> Hi,
>
> This must be very basic, but how'd you pass the same *args several
> levels deep?
>
> def func2(*args)
>
>     print args # ((1, 2, 3),)
>     # i want this to output (1, 2, 3) as func1!
>     # there must be some better way than args[0]?
>
> def func1(*args):
>
>     print args # (1, 2, 3)
>     func2(args)
>
> func1(1,2,3)
>
> Thanks!
>
> Guillermo

def func1(*args):
    print args
    func2(*args) # don't forget the '*'

Matt


From cjw at ncf.ca  Sat May 10 18:19:01 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 10 May 2008 18:19:01 -0400
Subject: test
Message-ID: <48261F55.50205@ncf.ca>

test


From kyosohma at gmail.com  Tue May 20 08:56:22 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 20 May 2008 05:56:22 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <ed2fbf6e-346e-48dd-b205-950e5e039ab2@s50g2000hsb.googlegroups.com>

On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
>
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
>
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
>
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> Thanks in advance,
> Eli

One way I forgot to mention is to put Python on the network (i.e. the
intranet). We do that here at work and I can develop my applications
on my machine and then put them on there for anyone to use. That way
they never have to install Python, let alone the bother of installing
dependencies.

Mike


From gray.bowman at gmail.com  Thu May 22 16:56:33 2008
From: gray.bowman at gmail.com (gray.bowman at gmail.com)
Date: Thu, 22 May 2008 13:56:33 -0700 (PDT)
Subject: where is the Write method of ElementTree??
Message-ID: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>

I'm messing around with trying to write an xml file using
xml.etree.ElementTree.  All the examples on the internet show the use
of ElementTree.write(), although when I try to use it it's not
available, gives me ...

   ElementTree(sectionElement).write("section.xml")
TypeError: 'module' object is not callable


I'm new to python, so I think I'm doing something wrong.. any
thoughts?

Thanks.'


See code below:

# Create xml structure
sectionElement = ElementTree.Element("section")

# step through feed result and create elements for each article -
result[article]
for article in feedResult:
    articleElement = ElementTree.Element("article")

    titleElement = ElementTree.SubElement(articleElement, "title")
    titleElement.text = article['title']

    bodyElement = ElementTree.SubElement(articleElement, "body")
    bodyElement.text = article['body']

    sectionElement.append(articleElement)

#print ElementTree.tostring(sectionElement)
ElementTree(sectionElement).write("section.xml")


From hniksic at xemacs.org  Tue May 20 10:14:19 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 20 May 2008 16:14:19 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
Message-ID: <874p8tawqs.fsf@mulj.homelinux.net>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> bearophileHUGS at lycos.com wrote:
>
>> John Salerno:
>>> What does everyone think about this?
>> 
>> The Example 2 builds a list, that is then thrown away. It's just a
>> waste of memory (and time).
>
> No, it doesn't.

This line:

    [new.append(c) for c in s if c not in new]

...throws away the list built by the comprehension itself, composed of
None values (returned by append).

> It uses append because it refers to itself in the if-expression. So
> the append(c) is needed

The append is not in question here.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:24:21 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:24:21 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
	<1e097d72-95a3-475b-8016-53b48808514f@l64g2000hse.googlegroups.com>
Message-ID: <482be51a$0$20002$426a34cc@news.free.fr>

vbgunz a ?crit :
>>>> Instance methods make the most sense. A static method makes sense too
>>>> *but* I can see how a class method not only does what a static method
>>>> does but how a class method *also* gets the cls reference for free.
>>> I don't understand the last part - but I certainly agree on the "instance
>>> methods make the most sense". But *if* you want a hierarchy
>>> of "sensefulness",
>>> method > classmethod > staticmethod
> 
> Sorry I quoted this earlier and meant to respond to it. What I meant
> was, might as well use a class method over a static method AND in
> doing so, cls is free.

cf Georges Sakkis point about this. 'cls is free' ? Well, not 
necessarily. Your function must take the class as first argument, and so 
you just can't use just any plain function as a classmethod.



From vlastimil.brom at gmail.com  Sun May  4 17:07:55 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Sun, 4 May 2008 23:07:55 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
Message-ID: <9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>

>
>
> Thank you very much for your comprehensive answer and detailed
informations, David; I really appreciate it!

As for the number of items, there would be approx. 34 000 calls of execute()
in my present code, in the
final version probably more; I think executmany is more efficient
here, if there aren't any drawbacks.
You are right, I should definitely use the standard approaches also usable
in other databases, rather than relying on the specific behaviour of sqlite3
(althought for the current task - an embeded, lightweight, in memory db,
sqlite seems to be an obvious choice).

Thanks for your comments on the concept,that's exactly, what I needed;
actually my
current version using sqlite3 is a reimplementation; the previous
script used nested dicts (as
the most suitable built-in data structure, I knew
of). In this older version the lookups for a tag
values given the text index were ok (as the indices are keys in the main
dict), however the other way (retrieving the index given a certain
combination of tag values)
is much harder and requires nested loops over the entire data on each query (or
alternatively multiple parallel dicts "keyed" on the available tag values).
I thought a database would perform much better in such cases (and the
preliminary tests confirm this); however now I see the possible risks too.
I'll look into other possible approaches. There will be clearly a
finite set of the
column names, hence it is possible to define the db at the beginning
and fill it with values only
after parsing the texts; the problem is, this can't be done untill the
texts are available, I just thought, a more generic
approach would be be more easily extensible and also a bit simpler.

As for the usage of the db in my
app, everything is simple, single threaded,  the parsing the text to get the
tags with their values are done in the program itself, hence it can be
controlled, as well as the text sources themselves; furthermore, there won't
be any explicit user queries of
SQL, all of them are programmatic - e.g. a text is displayed on the
screen and the information about the given line should
be retrieved and displayed (like chapter, verse
nr.) or vice versa - the user selects some property (e.g. beginning of
a certain chapter) and the text should be
scrolled to make the corresponding position visible.

Just for information, what are valid table and
column names in sqlite? (Unfortunately, I couldn't find any reference for
that (maybe except the reserved sqlite_master);  as quoted names, everything
I tried, worked
fine, also whitespace, various unicode characters etc.; of course, I
can imagine, that e.g. supplying a quote would
cause problems ... )

Thanks once more for your help,
                                  Vlasta
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From hniksic at xemacs.org  Thu May  8 04:10:18 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 08 May 2008 10:10:18 +0200
Subject: Problems with os.walk
References: <mailman.738.1210231614.12834.python-list@python.org>
Message-ID: <877ie52p3p.fsf@mulj.homelinux.net>

<Dominique.Holzwarth at ch.delarue.com> writes:

>     (dirpath, dirnames, filenames) = os.walk(scriptPath)

You're supposed to loop over values in different directories, like
this:

for dirpath, dirnames, filenames in os.walk(scriptPath):
    ... handle dirpath with dirnames and filenames ...

The loop will be executed for each subdirectory (direct and indirect)
of scriptPath.


From larudwer at freenet.de  Thu May 22 06:51:30 2008
From: larudwer at freenet.de (Ruediger)
Date: Thu, 22 May 2008 12:51:30 +0200
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<g0mab2$pkt$1@aioe.org>
	<51336537-0374-470a-a243-c6aa01e1fe9a@59g2000hsb.googlegroups.com>
Message-ID: <g13il8$ve9$1@aioe.org>

Paul Hankin wrote:


> This is better written using takewhile...
> itertools.takewhile(lambda x: x != value, iterable)
> 
> But if you really need to reinvent the wheel, perhaps this is simpler?
> 
> def test(iterable, value, op=operator.ne):
>     for x in iterable:
>         if not op(x, value):
>             return
>         yield x


yes you are right it is. However as i mentioned in my post i came up with an
solution 'like' that. In fact my original code was to complex to post.
While simplifying it, i've overseen the obvious solution.

For special cases where you need to do more complex tests, the best solution
is IMHO to hide it in an generator function like above.





From mensanator at aol.com  Fri May  2 16:49:25 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 13:49:25 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com>
Message-ID: <7c197680-2a56-44ec-b414-67c72b6a9ce9@d1g2000hsg.googlegroups.com>

On May 2, 2:57?pm, George Sakkis <george.sak... at gmail.com> wrote:
> On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
>
> > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > > Shawn Milochik wrote:
> > > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > > can this be done in Gmail?
>
> > > Set up a filter that looks for some phrase in the mail headers that
> > > identifies messages originating from google groups. ?Gmail's filters are
> > > fairly flexible. ?I'd probably just have it look for certain words.
> > > Look at an e-mail's source (raw view) and particularly check in the
> > > headers for things to filter by.
>
> > Why don't you just block all messages from Gmail?
>
> Look up the term "false positive" before you make such brilliant
> suggestions in the future.

_I_ understand it. Perhaps you should give this advice to the
ones who suggest blocking Google Groups.

>
> Posting-from-google-groups-ly yrs,
>
> George



From darcy at druid.net  Fri May  2 10:52:37 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 10:52:37 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <87y76ssrx0.fsf@physik.rwth-aachen.de>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<87y76ssrx0.fsf@physik.rwth-aachen.de>
Message-ID: <20080502105237.85d91f5d.darcy@druid.net>

On Fri, 02 May 2008 16:26:51 +0200
Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> > Certainly #! /usr/bin/python is fine if you never expect your
> > software to run outside of your own little corner of the world but
> > you asked why people prefer the env version and the answer is that
> > we want to write software that runs everywhere that Python runs.
> 
> Granted, but you must draw the line somewhere anyway.  I cannot

No one is talking about if statements here.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From gnewsg at gmail.com  Tue May 13 21:20:29 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 18:20:29 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1092.1210726578.12834.python-list@python.org>
Message-ID: <575bc914-c702-42c1-a6e5-e911e68187b9@c65g2000hsa.googlegroups.com>

On 14 Mag, 02:56, Jean-Paul Calderone <exar... at divmod.com> wrote:

> Why? ?Isn't this why subtraction exists? ?If there is a call scheduled to
> happen at T1 and the current time is T2, then I know that after (T1 - T2)
> elapses, it will be time to run the call. ?Why do I have to do any checks
> at all? ?I just tell select() to wait that long. ?Presumably this is just
> what someone will do if they want to use asyncore with timed calls. ?Call
> asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

That doesn't work if I decide to schedule one or more calls AFTER the
loop has started (see: "I already told select what timeout use").
As far as I've understood by reading the Twisted core what happens is
that there's a heap of scheduled calls and a loop that keeps calling
time.time() to check the scheduled functions due to expire soonest.
I've also proposed a patch for asyncore using the same approach:
http://bugs.python.org/issue1641

> So, actually, I'm not sure what the disagreement is about. ;) ?

The current disagreement is about how Twisted timed events are
implemented. :)

>?On the other hand, I didn't
> this thread (or maybe just this part of the thread) start out with
> a question about asyncore throughput? ?I have no idea what that
> might have to do with this.

Nothing, we just finished OT. :)


--- Giampaolo
http://code.google.com/p/pyftpdlib


From jphalip at gmail.com  Fri May  9 02:55:16 2008
From: jphalip at gmail.com (Julien)
Date: Thu, 8 May 2008 23:55:16 -0700 (PDT)
Subject: Saving an audio file's waveform into an image
Message-ID: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>

Hi,

I would like to pull out the waveform of an audio file and save it
into an image file, for example in GIF format. Is that achievable, and
if so, how?

I heard about the Snack module, but the project looks dead and un-
maintained.

Your advice would be greatly appreciated.

Thanks!

Julien


From paul.hankin at gmail.com  Mon May 12 11:35:37 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Mon, 12 May 2008 08:35:37 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> 
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
Message-ID: <c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>

On May 12, 1:59 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On May 12, 1:30 pm, John Machin <sjmac... at lexicon.net> wrote:
>
> > Duncan Booth wrote:
> [...]
> > > I think the variant I came up with is a bit clearer:
>
> > > for i in range(1,101):
> > >    print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>
> > More than a bit clearer, IMO. How about
> >      print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
> > (or perhaps
> >      print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
> > to save looking up the precedence rules) ?
>
> Stuff clarity!  How about
>
> for i in xrange(1, 101):
>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i

for i in xrange(1, 101):
    print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

--
Paul Hankin


From duncan.booth at invalid.invalid  Fri May  2 04:54:21 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 May 2008 08:54:21 GMT
Subject: my module and unittest contend over commandline options...
References: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>
Message-ID: <Xns9A9264BA67F0duncanbooth@127.0.0.1>

chrisber <christophberendes at gmail.com> wrote:

> I've poked around to see if I could delete the options my earlier code
> consumed from the commandline buffer, before invoking unittest, but
> that seems klugy. Instead, I hardwired  in a testing config file name,
> that always has to be local. That works pretty well, but it leaves me
> wonderfing whether there would have been another clean way to allow
> both my test code and unittest to have options without interfering
> with one another.
> 

You can pass argv as a parameter to main(), so I think the best bet is 
simply to build up a new argv with the options that you want to pass 
through.

Another option would be to subclass unittest.TestProgram and override 
parseArgs, but you'd have to copy & modify it as it doesn't seem to have 
been designed to be easily extendable.


From rsoh.woodhouse at googlemail.com  Wed May 28 17:38:42 2008
From: rsoh.woodhouse at googlemail.com (rsoh.woodhouse at googlemail.com)
Date: Wed, 28 May 2008 14:38:42 -0700 (PDT)
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
	<6a60t2F35v9uuU1@mid.uni-berlin.de>
Message-ID: <44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>

On May 28, 10:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> rsoh.woodho... at googlemail.com schrieb:
>
>
>
> > On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> rsoh.woodho... at googlemail.com schrieb:
>
> >>> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >>>> rsoh.woodho... at googlemail.com schrieb:
> >>>>> Hi,
> >>>>> I'm trying to work out some strange (to me) behaviour that I see when
> >>>>> running a python script in two different ways (I've inherited some
> >>>>> code that needs to be maintained and integrated with another lump of
> >>>>> code). The sample script is:
> >>>>> # Sample script, simply create a new thread and run a
> >>>>> # regular expression match in it.
> >>>>> import re
> >>>>> import threading
> >>>>> class TestThread(threading.Thread):
> >>>>>     def run(self):
> >>>>>         print('start')
> >>>>>         try:
> >>>>>             re.search('mmm', 'mmmm')
> >>>>>         except Exception, e:
> >>>>>             print e
> >>>>>         print('finish')
> >>>>> tmpThread = TestThread()
> >>>>> tmpThread.start()
> >>>>> tmpThread.join()
> >>>>> import time
> >>>>> for i in range(10):
> >>>>>     time.sleep(0.5)
> >>>>>     print i
> >>>>> # end of sample script
> >>>>> Now if I run this using:
> >>>>> $ python ThreadTest.py
> >>>>> then it behaves as expected, ie an output like:
> >>>>> start
> >>>>> finish
> >>>>> 0
> >>>>> 1
> >>>>> 2
> >>>>> ...
> >>>>> But if I run it as follows (how the inherited code was started):
> >>>>> $ python -c "import TestThread"
> >>>>> then I just get:
> >>>>> start
> >>>>> I know how to get around the problem but could someone with more
> >>>>> knowledge of how python works explain why this is the case?
> >>>> Works for me. And I don't see any reason why it shouldn't for you -
> >>>> unless you didn't show us the actual code.
> >>>> Diez
> >>> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
> >>> on Ubuntu 7.10. Which version of python/what platform were you using?
> >> mac-dir:/tmp deets$ python
> >> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
> >> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
> >> Type "help", "copyright", "credits" or "license" for more information.
> >> Welcome to rlcompleter2 0.96
> >> for nice experiences hit <tab> multiple times
>
> >> But I doubt this changes anything.
>
> >> Diez
>
> > Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
> > Python 2.4.5 on Debian and get the same results as I had before.
>
> Are you sure that ThreadTest isn't a somewhere else installed module?
> youc can use python -v to check where python gets it's files.
>
> and how about you attach/paste the full script somewhere?
>
> Diez

This is the full script straight from the text editor:

# START

import re

import threading
class TestThread(threading.Thread):

    def run(self):
        print('start')
        try:
            re.search('mmm', 'mmmm')
        except Exception, e:
            print e
        print('finish')

tmpThread = TestThread()
tmpThread.start()
tmpThread.join()
import time
for i in range(10):
    time.sleep(0.5)
    print i

# END

In OS X I get the following output (where TestThread.py is in the
current directory):

$ python -v -c "import TestThread"
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
site.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/site.py
import site # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/site.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
os.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/os.py
import os # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/os.pyc
import posix # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
posixpath.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/posixpath.py
import posixpath # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/posixpath.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
stat.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/stat.py
import stat # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/stat.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
UserDict.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/UserDict.py
import UserDict # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/UserDict.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
copy_reg.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/copy_reg.py
import copy_reg # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/copy_reg.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
types.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/types.py
import types # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/types.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
warnings.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/warnings.py
import warnings # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/warnings.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
linecache.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/linecache.py
import linecache # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/linecache.pyc
import encodings # directory /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/__init__.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/__init__.py
import encodings # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/__init__.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
codecs.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/codecs.py
import codecs # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/codecs.pyc
import _codecs # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/aliases.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/aliases.py
import encodings.aliases # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/aliases.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
encodings/ascii.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/encodings/ascii.py
import encodings.ascii # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/encodings/ascii.pyc
Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
import TestThread # from TestThread.py
# wrote TestThread.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
re.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/re.py
import re # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/re.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/lib/
python2.4/sre.py
import sre # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/sre.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_compile.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/sre_compile.py
import sre_compile # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_compile.pyc
import _sre # builtin
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_constants.pyc matches /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/sre_constants.py
import sre_constants # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_constants.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
sre_parse.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/sre_parse.py
import sre_parse # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/sre_parse.pyc
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
threading.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/threading.py
import threading # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/threading.pyc
import thread # builtin
import time # dynamically loaded from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/lib-dynload/time.so
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
traceback.pyc matches /Library/Frameworks/Python.framework/Versions/
2.4/lib/python2.4/traceback.py
import traceback # precompiled from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/traceback.pyc
import collections # dynamically loaded from /Library/Frameworks/
Python.framework/Versions/2.4/lib/python2.4/lib-dynload/collections.so
# /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
atexit.pyc matches /Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/atexit.py
import atexit # precompiled from /Library/Frameworks/Python.framework/
Versions/2.4/lib/python2.4/atexit.pyc
start


At which point it just hangs.

Thanks,
Rowan


From bruno.desthuilliers at gmail.com  Wed May 14 17:30:07 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:30:07 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
Message-ID: <e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>

> Dave Parker schrieb:

> > All of the calculators and textbooks that elementary school students
> > use, use "^" for powers.

I've never seen this symbol in textbooks. In textbooks, powers are
written using superscript.

>>  Just like Flaming Thunder does.  I haven't
> > seen "**" for powers since FORTRAN.

I haven't seen any language using '^' as the power operator so far -
but I've seen quite a lot of them using it as the bitwise XOR operator.


From daveparker at flamingthunder.com  Wed May 21 10:55:52 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 07:55:52 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
	<60f15334-e7fa-4a27-add1-5f4fd2e14276@w4g2000prd.googlegroups.com>
Message-ID: <0abd45df-5303-47c6-a2d3-778f0cb6cdd8@w4g2000prd.googlegroups.com>

> Personally (and borrowing from Python), I'd prefer something more
> like:
>
> Write "Fa".
> Repeat 8 times:
>     Write "-la".

I actually kind of prefer that, too.  Or

Repeat 8 times write "-la".

I'll think about it.  Thank you for suggesting it.

On May 20, 3:40?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 20, 4:20 am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
>
>
> > > > I <davepar... at flamingthunder.com> wrote:
> > > > Plus, me getting paid to work on Flaming Thunder is far more
> > > > motivating than me not getting paid to work on Python.
> > > On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > > That's truly disappointing.
>
> > I guess I could have stated that better. ?Flaming Thunder is a labor
> > of love for me. ?I've programmed in almost every language since
> > FORTRAN and Lisp, and Flaming Thunder is the language I've always
> > wished the others were.
>
> > For one example, I've always preferred compiled languages because
> > they're faster. ?So Flaming Thunder is compiled.
>
> > For another example, I've always preferred languages that are English-
> > like because it's easier to return to your code after several years
> > and still know what you were doing (and it's easier for someone else
> > to maintain your code).
>
> > For over 5 years I've been working on Flaming Thunder unpaid and on my
> > own, getting the back-end up and running. ?8-by-8 shotgun cross
> > compilers written in assembly language, that can fit all of the
> > libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
> > OS X and Windows into a single executable file that's less than 180K,
> > aren't written overnight.
>
> > So now that I've released it, it's extremely gratifying that people
> > think it's cool enough to actually pay $19 for it. ?That gives me lots
> > of motivation (and buys enough time) for me to add features to it as
> > fast as possible.
>
> > To whit: you pointed out the awkwardness in Python of having to
> > declare a for-loop variable when you only wanted to loop a specific
> > number of times and didn't need the variable. ?Last week, Flaming
> > Thunder had the same awkwardness. ?If you wanted to loop 8 times:
>
> > for i from 1 to 8 do <statement>
>
> > you still had to use a variable (in this case, i). ?This week, I've
> > added two new for-loop variations that fix that awkwardness, and also
> > allow you to explicitly declare an infinite loop without having to
> > rely on idiomatic constructs such as while-true. ?Examples of the two
> > new variations (for-forever and for-expression-times):
>
> > Write "Fa".
> > For 8 times do write "-la".
>
> Personally (and borrowing from Python), I'd prefer something more
> like:
>
> Write "Fa".
> Repeat 8 times:
> ? ? Write "-la".
>
> > For forever do
> > ? (
> > ? Write "Do you know the definition of insanity? ".
> > ? Read response.
> > ? ).
>
> Repeat:
> ? ? Write "Do you know the definition of insanity? ".
> ? ? Read response.- Hide quoted text -
>
> - Show quoted text -



From deets at nospam.web.de  Thu May  1 08:34:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 May 2008 14:34:17 +0200
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <67trmcF2qeo0mU1@mid.uni-berlin.de>

Lance Gamet schrieb:
> Hi, python beginner starting a new project here.
> 
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
> 
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
> 
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
> 
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
> 
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.

I'd go for .file in ConfigParser-format that resides in the users 
home-directory. ConfigParser is a standard lib module for .ini-like files.


Diez


From bgporter at acm.org  Tue May  6 07:14:49 2008
From: bgporter at acm.org (Brett g Porter)
Date: Tue, 06 May 2008 07:14:49 -0400
Subject: Python MIDI in 2008
In-Reply-To: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
Message-ID: <48203DA9.1090408@acm.org>

Maciej Blizi?ski wrote:
> For the last couple of days, I've been looking for a Python midi
> library. I'm generally interested in sending MIDI events via ALSA. It
> seems like everything out there is pretty old; packages are from 2003
> or 2005. Some packages don't seem to be really used, for instance
> portmidi doesn't even support installing it system-wide; you can
> compile it and... no make install for you.
> 
I haven't used the PortMidi bindings that are in the Cheeseshop at 
http://pypi.python.org/pypi/pyPortMidi/0.0.3

but I've used PortMidi extensively from C++ code and have had excellent 
results with it.


From PurpleServerMonkey at gmail.com  Sat May 24 20:04:27 2008
From: PurpleServerMonkey at gmail.com (PurpleServerMonkey)
Date: Sat, 24 May 2008 17:04:27 -0700 (PDT)
Subject: Python, Daemons and D-Bus
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
	<g19rcb$pjt$02$1@news.t-online.com>
Message-ID: <24f7b472-0a87-487d-9a7d-8706a546c54d@p39g2000prm.googlegroups.com>

On May 25, 5:46?am, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
wrote:
> [ PurpleServerMonkey <PurpleServerMon... at gmail.com> ]
>
> > Would you use D-Bus or a more traditional IPC method such as sockets?
> > Although D-Bus is relatively new it looks interesting, just not sure
> > it would work well in this kind of project.
>
> DBus is not really intended for private communication between processes of
> the same application, but more for intercommunication between different
> applications. ?If the IPC interface of your backend daemons is intended to
> be used by other applications, DBus is the right choice, otherwise I would
> choose something different.
>
> The reason is, that DBus doesn't know about applications. ?It exposes all
> objects registered on the bus to every DBus client on the system and so
> makes you application-private API available to the public (and spams the
> bus with lots of generally useless objects ;) ).
>
> In case your IPC interface is application private, a custom IPC protocol
> (probably using XML RPC over unix sockets) is better suited.
>
> Moreover you should make your choice dependent on the type of data you
> transmit. ?Both DBus and XML-RPC wrap calls into XML messages, which is
> terribly inefficient for large binary data.
>
> --
> Freedom is always the freedom of dissenters.
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (Rosa Luxemburg)

Thanks Sebastian,

Your comments make a lot of sense. I was thinking of creating a custom
session channel and using that for my purposes but as you mentioned
it's not very secure and I do want to keep the server to daemon
traffic private, the server has an XML-RPC interface with a public
API.

Will definitely look at using a different IPC mechanism for this part
of the project.


From dmitrey.kroshko at scipy.org  Sun May 18 03:10:29 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 00:10:29 -0700 (PDT)
Subject: howto use pylint from Eric IDE?
Message-ID: <b1463f3f-791c-417c-9389-baf1f9ac0f3c@f63g2000hsf.googlegroups.com>

Hi all,

I have Eric 4.1.1, pylint and Eric pylint plugin installed, but I
cannot find how to use pylint from Eric IDE GUI.
Does anyone know?

Thank you in advance, D.


From onsen-neko at gmx.net  Wed May  7 15:19:30 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Wed, 7 May 2008 21:19:30 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>
Message-ID: <200805072119.30744.onsen-neko@gmx.net>

Am Dienstag 06 Mai 2008 16:07:01 schrieb Mike Driscoll:

> If so, then it looks like an Interface is a generic class with method
> stubs. You can do that with Python just as easily by creating empty
> methods with just the "pass" keyword. 

Well, no. It's a litte different. Interfaces force to implement methods. 
Simple inheritance with method-stubs can't garantee that a specific 
method is reimplementat in a sub-class. Interfaces work at 
compile-time, while method-stubs raise at their first call, so in worst 
case, never (when the developer is available). 

> Since it's just a construct to implement polymorphism, I don't think
> you'll lose anything. However, Python does not require you to re-
> implement every method of the class it is inheriting from. 

That's the point. Interfaces garantee that a duck is a duck, an not only 
a chicken that quack. 

> You can just override those that you want and leave the others alone.

Not always desirable. But often enough ;)


From ivan.illarionov at gmail.com  Mon May 26 20:36:23 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 17:36:23 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <483a1319$0$34516$742ec2ed@news.sonic.net>
	<g1f91t$rvh$1@aioe.org>
Message-ID: <715e1a8a-0f93-4f42-80d9-4772842a5b1a@b1g2000hsg.googlegroups.com>

On May 27, 1:11?am, Martin Manns <mma... at gmx.net> wrote:
> On Sun, 25 May 2008 18:46:27 -0700
>
> John Nagle <na... at animats.com> wrote:
> > >>>> func_strings=['x', 'x+1', 'x+2', 'x']
> > >>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>
> > ? ?What are you actually trying to do, anyway? ?What's the
> > application?
>
> > ? ?You probably don't want to use "eval" that way. ?If you want
> > function objects out, use "compile".
>
> I am writing on an application that I call pyspread
> (http://pyspread.sourceforge.net).
> It provides a grid (mapped to a numpy.array) into which users can type
> in strings that contain python expressions.
> Each expression is transformed into a function object in a second
> numpy.array of the same size, so that each function can be called by
> accessing the respective cell of the grid.
>
> eval seems to work quite fine and provides nice access to globals,
> system functions, modules, etc. Therefore, one can do general
> programming tasks within the grid without worrying about cell
> precedence.
>
> compile returns code objects instead of function objects. I can of
> course evaluate these code objects. However, when I store the code
> objects, it is an extra operation each time I want to call the
> function. So what is the benefit?
>
> More specific: Is there any benefit of calling:
>
> eval(compile(mystring, '', 'eval'))
>
> instead of
>
> eval(mystring)
>
> ?
>
> What are the drawbacks of my approach that I may be missing?
> Any suggestions?
>
> Best Regards
>
> Martin

Yes, there is.
Your original example can be rewritten

>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>> funclist = [compile('lambda x: %s' % func, '<string>', 'eval') for func in func_strings]
>>> len(funclist)
4
>>> len(set(funclist))
3
>>> eval(funclist[0])(1)
1

Ivan


From castironpi at gmail.com  Fri May 16 11:36:25 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 08:36:25 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<g0jk0v$coa$01$1@news.t-online.com>
Message-ID: <8a536785-1d47-445d-b3f9-c40afe0934f0@b1g2000hsg.googlegroups.com>

On May 16, 4:26 am, Peter Otten <__pete... at web.de> wrote:
> ?? wrote:
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> The implementation of slots depends on that behaviour:
>
> http://docs.python.org/ref/slots.html
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> Can you expand on that?
>
> Peter

Yes I can.  But what is LSP?


From spoier at gmail.com  Tue May 20 15:56:17 2008
From: spoier at gmail.com (Skye)
Date: Tue, 20 May 2008 12:56:17 -0700 (PDT)
Subject: Access to sysctl on FreeBSD?
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
	<48331cef$0$32633$9b622d9e@news.freenet.de>
Message-ID: <d3ff8bd6-50d2-4cd9-bfc1-5ded6f14fccf@h1g2000prh.googlegroups.com>

Great, thanks for the help (I'm fairly new to Python, didn't know
about ctypes)

    from ctypes import *
    libc = CDLL("libc.so.7")
    size = c_uint(0)
    libc.sysctlbyname("net.inet.ip.stats", None, byref(size), None, 0)
    buf = c_char_p(" " * size.value)
    libc.sysctlbyname("net.inet.ip.stats", buf, byref(size), None, 0)

So now that I've got the data, can you point me towards docs
explaining how to layout struct ipstat?

Thanks,
Skye



From seberino at spawar.navy.mil  Tue May  6 00:32:36 2008
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: Mon, 5 May 2008 21:32:36 -0700 (PDT)
Subject: Bad form to access a *private variable* like _foo?
Message-ID: <c970e020-f580-4b28-bd1d-16c163bff369@s33g2000pri.googlegroups.com>

Bad form to access a *private variable* like _foo?

The reason I'm asking is that TurboGears/SQLObject mobel objects have
an attribute called "_connection" that must be used to manually commit
database stuff....

e.g.  MyObject._connection.commit()

It bugs me.  I don't know if it is a stylistic faux pas or not.

Is it?

Chris


From aspersieman at gmail.com  Thu May  8 08:57:53 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 14:57:53 +0200
Subject: POP connection timeout.
In-Reply-To: <op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <4822F105.5050505@gmail.com>
	<op.uat53k0px6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <4822F8D1.7000803@gmail.com>

Gabriel Genellina wrote:
> Use socket.setdefaulttimeout(timeout_in_seconds) before you create the POP3 object; this value will be used by the initial connect. Once it is connected, you can set a different timeout for retrieving mail using pop.sock.settimeout(...)
> Note that setdefaulttimeout applies to ALL subsequent socket operations, not only using poplib.
> <http://docs.python.org/lib/socket-objects.html>
>
>   
Fantastic! This works thanks.

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From zer0dyer at verizon.net  Mon May 26 19:28:01 2008
From: zer0dyer at verizon.net (Curtis)
Date: Mon, 26 May 2008 23:28:01 GMT
Subject: php vs python
In-Reply-To: <7xwslnwa3s.fsf@ruckus.brouhaha.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com>
Message-ID: <5IH_j.3432$tF1.2671@trnddc01>

Paul Rubin wrote:
> notbob <notbob at nothome.com> writes:
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
> 
> php is very easy to get started with and some big sites have been
> written in it.  There is lots of low cost php hosting available.  It
> is not as good a language as Python.  However, Python's advantages are
> strongest in more complex projects.  For simple stuff, php is frankly
> less hassle just because of its wide deployment and that extensive
> function library that the blog post your quoted described as a bad
> thing.  Python's libraries are not bad, but php's are more intensely
> focused on web apps and includes what you need as part of the standard
> build.  With Python, if you want a database adapter or web template
> framework, you have to choose between a bunch of different ones and
> download and configure it which often involves head scratching when
> the auto-install stuff hits some quirk of your system.  With php, it's
> all right there when you flip the switch.
> 
> Knowing lots of languages is good for you.  php is probably your
> quickest route to getting a rudimentary web app running.  Python
> is a longer term project.  Do both.

PHP is more than capable for handling large projects, not just small 
scripting jobs. However, Paul's right about PHP being more driven 
toward web development, where as Python may be better for different 
types of apps.

Even then, I think your first reply was best, it just comes down to 
what you have more fun writing. Both languages are equally capable of 
getting the job done.

--
Curtis


From eckhardt at satorlaser.com  Mon May 26 06:20:36 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Mon, 26 May 2008 12:20:36 +0200
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com>
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
Message-ID: <rgfqg5-dg1.ln1@satorlaser.homedns.org>

Prisoner at War wrote:
> On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>>
>>
>> The differences aren't so fundamental or important: it's not an entirely
>> new language, just some ugly old things are being removed or changed in
>> incompatible ways (at *some* time it was supposed to happen - but could
>> not happen on the 2.x series which has to remain backwards compatible)
>> Also, Python 3.0 will be released simultaneously with 2.6, and there will
>> be other 2.x releases. Python 2 won't magically disappear from Earth, I
>> don't think Linux distros will come with Python 3.0 by default anytime
>> soon (perhaps not before 3.1).
> 
> But I'd read that Python 3 is very different in many important ways.

Yes, and that is the reason it is version 3.x instead of another 2.x. Moving
to version 3 signals that some changes were done that are _not_ backward
compatible and not even intended to.

> I read it right there on the Py3K site!  I can't make sense of how,
> why, even what, exactly, but that's not a misimpression on my part,
> I certain nonetheless...it's not just cosmetic changes but important
> ones pertaining to a sort of "linguistic logic" I gather....

Well, cosmetic or important is always in the eye of the beholder. I
personally would say that they are important cosmetic changes. You don't
get any new features or a more Touring-complete language suddenly, but it
will be much more consistent because it doesn't have to maintain wrong
decisions of the past, like making 'print' a separate statement when a
function would do.

>> So learning Python with a book targeted to 2.5 isn't a waste of time -
>> not at all.
> 
> Well, I will be learning Python from the excellent materials available
> online, to be sure, but a book that I spend money for, well, I have
> "higher standards" for it, you know, one of which is that it doesn't
> get superseded so soon!

As already pointed out, Python 2 will not suddenly cease to exist and
knowledge about it won't suddenly be worthless either. I guess it will take
a few years until the use of Python 3 supercedes that of Python 2.

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From bignose+hates-spam at benfinney.id.au  Thu May 15 06:02:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 May 2008 20:02:43 +1000
Subject: Sanitised Newsgroup Feeds?
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <8763tfyjek.fsf@benfinney.id.au>

Paddy <paddy3118 at googlemail.com> writes:

> Does anyone do a sanitised newsgroup feed? Something like what mail
> filters do for email?

The feature you're looking for is called a "kill list" or "kill file":
add patterns to the kill file, and matching messages will be omitted
from your view of the newsgroup.

Whether your NNTP client supports such a feature is for you to
determine. (I'm pretty sure Google Groups, among its litany of
failings as an NNTP client, is lacking in this aspect too. So, don't
use Google Groups.)

> It is getting tedious wading through the ads for 'cracks' & watches;
> as well as the Xah cross-posted self-promotions, the wx-'its easier to
> post than read the tutorial' annoyances and the castiro (human/Eliza?)
> weirdnesses.

Yes, those authors are among the patterns in my GNUS kill file.

> I guess that many would want to add the same things to their kill
> file, but it takes me three clicks to add anyone/any thread to it
> and the c.l.p signal-to-noise is getting lower.

Huh? How often do you have to add patterns to the file? I do it once
every couple of weeks, if that.

-- 
 \     "Are you pondering what I'm pondering?" "I think so, Brain, but |
  `\    pants with horizontal stripes make me look chubby."  -- _Pinky |
_o__)                                                   and The Brain_ |
Ben Finney


From google at mrabarnett.plus.com  Tue May 13 18:14:49 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 13 May 2008 15:14:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <919416e2-590d-48ad-9d75-80a1a4c04732@b1g2000hsg.googlegroups.com>

On May 13, 6:32 pm, "D'Arcy J.M. Cain" <da... at druid.net> wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <misho... at gmail.com> wrote:
>
> > Not everybody has grown in English-speaking community, you know. And
> > knowing math quite good, I prefer writing "x = y" instead of "Set x to
> > y".
>
> OMG!  It's COBOL.
>
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  If that wasn't true then pseudocode would look a lot more
> like English than it does.  In fact, pseudocode tends to look a lot
> like Python.
>
I once had to do a bit of scripting in AppleScript. The problem I
found was that AppleScript tries to be so much like natural English
that I never got a clear idea of whether something would be valid!


From d.a.abernathy at gmail.com  Thu May 22 17:24:11 2008
From: d.a.abernathy at gmail.com (dj)
Date: Thu, 22 May 2008 14:24:11 -0700 (PDT)
Subject: Using os.walk to return files in subdirectories
Message-ID: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>

Hello All,

I am attempting to us os.walk to populate two lists with values from a
directory. The first list contains all the files in the directory and
subdirectories.
The second list contains only the files in the subdirectories.

Here is the code:

import os

# list of matching files
allfiles = [] #store all files found
subfiles = []  # subdir

for root,dir,files in os.walk("H:/python_experiments", f1):
     # this list has the files in all directories and subdirectories
     filelist = [ os.path.join(root,fi) for fi in files if
fi.endswith(".py") or fi.endswith(".txt") ]
     for f in filelist:
         allfiles.append(f)

     # split the root
     s= root.split(('\\') or ('\/'))
     print 's ',
     print s

     # assign the last value to end to come to values in dir
     end= s[-1]
     print 'end ',
     print end
     print '\n'

     # this list contains only the files in subdirectories
     for d in dir:
        if end == d:
         print 'subdir % s' % (end)
         sublist = [ os.path.join(root, fi) for fi in files if
fi.endswith(".py") or fi.endswith(".txt")]
         for f in sublist:
             subfiles.append(f)

for i in subfiles:
    print 'subfile', i


for i in allfiles:
    print "file ", i

The allfiles list is populated, but the subfiles list is not. Any
Suggetions ?


From zaka3enator at gmail.com  Mon May  5 10:43:49 2008
From: zaka3enator at gmail.com (Zaka)
Date: Mon, 5 May 2008 07:43:49 -0700 (PDT)
Subject: Pygame and PGU
Message-ID: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>

Hi. I need some help to make map system in PGU. For exmple we have 2
maps and when we leave first we enter to second.


--------------------
                   !


___________


From hdante at gmail.com  Fri May 16 13:24:13 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Fri, 16 May 2008 10:24:13 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <1dbf604c-e49f-424d-ae06-1a9ec7f5cc0c@m73g2000hsh.googlegroups.com>

>
> yeah I don't know much about that, ?I was figuring perhaps I could limit the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows. ? also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.

 You're wrong.

 Maybe we could help you better if you told us what task are you
trying to achieve (or which algorithms do you think need optimization).


From ptmcg at austin.rr.com  Mon May 12 10:08:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 12 May 2008 07:08:39 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
Message-ID: <3c7eea22-e704-405c-a014-8ec7f38f8739@b64g2000hsa.googlegroups.com>

On May 12, 5:37?am, Iman <iman.dar... at gmail.com> wrote:
> is there any sample source code in python or links, docs to help me ?
> ?thanks for your attention .

I've used SimPy in the past to implement a factory simulation.  The
SimPy web site claims that it has been used for traffic simulation,
but does not give any links.

    http://simpy.sourceforge.net/index.html

I found it to be a very neat discrete event simulator, making good use
of Python language features (especially generators).

HTH,
-- Paul


From sjmachin at lexicon.net  Thu May 15 12:33:21 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:33:21 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <659df7b5-6dde-48f7-bf2f-cb7a0f8a84bc@w5g2000prd.googlegroups.com>

On May 16, 2:12 am, globalrev <skanem... at yahoo.se> wrote:
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')

Two different paths again.

> d.readline()

This reads one line and then does absolutely nothing with it. The
Python interactive shell prints the result of each expression, which
is a Good Thing. For Python to do the same when running a script would
be a Bad Thing.

readline and readlines are old hat; instead, iterate over the file
object, like this:

for line in d:
    print line,

>
> returns true in the shell but prints no text even though the document
> contains text.
>
> d.name returns nothing, d.name() raises an error.

d.name should return the name of the file; I suspect that you again
have done nothing with it. d.name() would raise an exception because
d.name is not a method, so you can't call it.

HTH,
John


From lists at cheimes.de  Thu May 22 07:58:27 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 22 May 2008 13:58:27 +0200
Subject: How do I know when all threads are done?
In-Reply-To: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
References: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
Message-ID: <g13n54$m80$1@ger.gmane.org>

Zerge schrieb:
> I can launch threads just fine, but then I have to do a time.sleep(n)
> so the main thread from which they where launched will wait for all
> the threads to return.
> 
> How can I detect when all threads are done and then return control to
> the main threads?

import threading

threads = []

threads.append(threading.Thread(...))
threads.append(threading.Thread(...))
threads.append(threading.Thread(...))

for thread in threads:
    thread.start()

# now all threads are running, some might already be done

for thread in threads:
    thread.join()

# here all threads are done

Christian



From certo at comeno.it  Mon May 26 13:10:46 2008
From: certo at comeno.it (imho)
Date: Mon, 26 May 2008 17:10:46 GMT
Subject: About Michele Simionato's "classinitializer" decorator
Message-ID: <qaC_j.85793$FR.319565@twister1.libero.it>

Hi all.
I just send this post as a comment to the third part of Michele 
Simionato's article about metaprogramming techniques at:

http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT=105AGX03&S_CMP=ART


I found extremely useful the classinitializer "trick". I was thinking 
over the caveat not to call a class initializer after the _metaclass_ 
hook (an exception being raised in that case).
Am I wrong if I state there's a plain solution to this ? I modified the 
lines involving "type", replacing it with a custom meta type returned by 
a call to frame.f_locals.get("__metaclass__", type), in such a way the 
creation of the class involves the right metaclas, even if it was 
defined  just before the initializer function:

def classinitializer(proc):
     # basic idea stolen from zope.interface.advice, P.J. Eby
     def newproc(*args, **kw):
        frame = sys._getframe(1)
        if '__module__' in frame.f_locals and not \
            '__module__' in frame.f_code.co_varnames: # we are in a class
            thetype = frame.f_locals.get("__metaclass__", type)
            def makecls(name, bases, dic):
                try:
                    cls = thetype(name, bases, dic)
                except TypeError, e:
                    if "can't have only classic bases" in str(e):
                        cls = thetype(name, bases + (object,), dic)
                    else:  # other strange errs, e.g. __slots__ conflicts
                        raise
                proc(cls, *args, **kw)
                return cls
            frame.f_locals["__metaclass__"] = makecls
        else:
            proc(*args, **kw)
     newproc.__name__ = proc.__name__
     newproc.__module__ = proc.__module__
     newproc.__doc__ = proc.__doc__
     newproc.__dict__ = proc.__dict__
     return newproc

This makes the trick work even if a metaclass or another 
classinitializer was defined first:

@classinitializer
def enhance(cls, **kw):
     for k, v in kw.iteritems():
         setattr(cls, k, v)

class M(type):
     pass

class A:
     __metaclass__ = M
     enhance(x=100)
     enhance(y=200)


 >>> A.x
100
 >>> A.y
200
 >>> type(A)
<class '__main__.M'>

What do you think about this solution ?

Diego Novella.


From renesd at gmail.com  Thu May  1 17:37:18 2008
From: renesd at gmail.com (illume)
Date: Thu, 1 May 2008 14:37:18 -0700 (PDT)
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C libraries 
	on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com> 
	<mailman.405.1209643816.12834.python-list@python.org>
Message-ID: <372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>

Ah, why is that?

There's still at least 1.1% of people using win98, if you believe this
source of stats:
http://www.w3schools.com/browsers/browsers_os.asp

I just noticed that win9x winme and win nt are all being dropped from
python.

I know they are old and crufty, but there's still heaps of people
using them.

Someone pointed me to the pep, where the un-support seems planned:
http://www.python.org/dev/peps/pep-0011/


Seems like a lot of people using it, so it's still worthwhile making
2.6 work with win98.





On May 1, 10:09?pm, Christian Heimes <li... at cheimes.de> wrote:
> illume schrieb:
>
> > Hi,
>
> > after a little research it appears that win9x is not supported by the
> > msvcr90.dll run time.
>
> > Can you confirm thisLenard?
>
> > Has anyone tested the new python binaries that link to msvcr90.dll on
> > win9x machines?
>
> It doesn't matter to use because Python 2.6 and 3.0 require at least
> Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.
>
> Christian



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From tjreedy at udel.edu  Tue May 27 02:04:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 May 2008 02:04:48 -0400
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com><a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
	<mailman.1617.1211818106.12834.python-list@python.org><039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com><mailman.1629.1211844239.12834.python-list@python.org>
	<03655ec7-2136-4cea-9575-34e321356439@p25g2000pri.googlegroups.com>
Message-ID: <g1g89v$70j$1@ger.gmane.org>


"Russ P." <Russ.Paielli at gmail.com> wrote in message 
news:03655ec7-2136-4cea-9575-34e321356439 at p25g2000pri.googlegroups.com...
| Hmmm... that seems a bit strange. Why should "_variable" be visible
| when you use "import module"

Because you only add one name to the current namespace -- bound to a 
module --  and there is no reason to exclude attributes of that object.

|but not when you use "from module import *"?

Because you are already adding m names and adding n more names may cause 
problems -- which is what lead to the addition of the __all__ mechanism 
some years back.  Sorry, I forget the details because they don't concern 
me.

| > That last form should not be used normally, except when playing with 
the
| > interactive interpreter.
|
| OK, I have a confession to make. I use "from module import *" almost
| exclusively. But then, I'm different from most folks. I can drink six
| beers and still drive safely, for example. The key is to drive faster
| so I can get past dangerous situations quicker.





From gandalf at shopzeus.com  Tue May 27 11:34:24 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 27 May 2008 17:34:24 +0200
Subject: datetime.stdptime help
Message-ID: <483C2A00.2060507@shopzeus.com>

            def str2datetime(s):
                #28 May 2008 12:38:16 BDT
                return time.strptime(s,"%d %b %Y %H:%M:%S %Z")

            #.... some code here....
            print repr(pd)
            print str2datetime(pd)


Result:

'24 May 2008 12:38:16 BDT'
Traceback (most recent call last):
  File "__init__.py", line 40, in <module>
    print ssc.get_order_data('202-9810306-3236320')
  File 
"/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py", 
line 306, in get_order_data
    print str2datetime(pd)
  File 
"/usr/local/www/vhosts/zeusd1/fantasy/controller/sites/ControllerBase.py", 
line 299, in str2datetime
    return time.strptime(s,"%d %b %Y %H:%M:%S %Z")
  File "/usr/local/lib/python2.5/_strptime.py", line 331, in strptime
    (data_string, format))
ValueError: time data did not match format:  data=24 May 2008 12:38:16 
BDT  fmt=%d %b %Y %H:%M:%S %Z

I think that the format is correct. What am I doing wrong?

Thanks,

   Laszlo



From aahz at pythoncraft.com  Tue May  6 16:00:43 2008
From: aahz at pythoncraft.com (Aahz)
Date: 6 May 2008 13:00:43 -0700
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <fvqddb$t6l$1@panix3.panix.com>

In article <mailman.642.1210067048.12834.python-list at python.org>,
Max M  <maxm at mxm.dk> wrote:
>
>Well I just thought I would mention that it is not dead. Merely middle aged.

"'E's just resting!"
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From ptmcg at austin.rr.com  Sat May 24 09:52:57 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:52:57 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<43381ce3-3505-482e-82ac-0643eb57e25b@k37g2000hsf.googlegroups.com>
Message-ID: <73b0bf97-0a77-41f4-acc4-b8cad9f08d77@2g2000hsn.googlegroups.com>

This version is a bit better, since it follows the convention that
'<<' should return self.

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return self

    def __bool__(self):
        return bool(self.value)
    __nonzero__ = __bool__

-- Paul


From sjmachin at lexicon.net  Thu May 15 12:16:42 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:16:42 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
Message-ID: <903bad80-e562-4df1-96aa-8e1015d725ca@p25g2000pri.googlegroups.com>

On May 16, 2:03 am, globalrev <skanem... at yahoo.se> wrote:
> print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> \trainingsetunzipped\training_set\mv_0000001.txt')
>
> d=open('C:/Python25/myPrograms/mapexperiments/maps/provinces-of-
> sweden.gif')
> d.close()
>
> exists returns false but when i open it doesnt complain. how come?
>
> another file that exists returned false for complained when i tried to
> open it.

Ummm ... you are testing one path with os.path.exists and then opening
a *DIFFERENT* path. If you think you still have a problem, show us a
short piece of code that you actually executed and that demonstrates
the problem.


From eliben at gmail.com  Sat May 17 05:42:17 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 02:42:17 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
Message-ID: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>

Hello,

I'm getting into Python now after years of Perl, and as part of my
research I must understand how to do some common tasks I need.

I have a bunch of Windows PCs at work to which I want to distribute an
application I've developed on my PC. All these PCs have Python 2.5
installed.

If my application contains only code I've developed, I simply zip its
directory with .py files and send it to everyone, who can then use it
by running the entry-point .py file. However, what if I've installed
some 3rd party modules on my PC, and my application uses them (for
example pyparsing, PiYAML and some others) ? I don't want to manually
install all these packages (there may be dozens of them) on all those
PCs (there may be dozens of those too). What is the best method I can
use ? Naturally, I want all the non-standard packages my app uses to
be detected automatically and collected into some kind of convenient
distributable that is easy to pass around and run.

I'm aware of py2exe - tried it and it works fine. But it creates huge
executables, and I don't want to distribute those all the time. I much
prefer a zipped directory of .py scripts that takes some 10s of KBs.

Thanks in advance,
Eli


From dkcombs at panix.com  Thu May 29 20:56:37 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 00:56:37 +0000 (UTC)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <g1njc5$p1i$1@reader2.panix.com>

In article <rem-2008may08-005 at yahoo.com>,
Robert Maas, http://tinyurl.com/uh3t <usenet1.3.CalRobert at SpamGourmet.Com> wrote:
>> From: "xah... at gmail.com" <xah... at gmail.com>
>> the importance of naming of functions.
>

Lisp is *so* early a language (1960?), preceeded mainly only by Fortran (1957?)?,
and for sure the far-and-away the first as a platform for *so many* concepts
of computer-science, eg lexical vs dynamic ("special") variables, passing
*unnamed* functions as args (could Algol 60 also do something like that,
via something it maybe termed a "thunk"), maybe is still the only one
in which program and data have the same representation -- that it'd 
seem logical to use it's terminology in all languages.

>From C is the very nice distinction between "formal" and "actual" args.

And from algol-60, own and local -- own sure beats "static"!

And so on.


To me, it's too bad that that hacker-supreme (and certified genius)
Larry W. likes to make up his own terminology for Perl.  Sure makes
for a lot of otherwise-unnecessary pages in the various Perl texts,
as well as posts here.

Of course, a whole lot better his terminology than no language at all!


David




From fc14301589 at icqmail.com  Sat May 24 02:49:32 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sat, 24 May 2008 14:49:32 +0800
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <4837ba88_1@news.tm.net.my>

On 06:59, sabato 24 maggio 2008 Johannes Bauer wrote:

> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

If you want speak a language that isn't understood mostly you'll face
unexpected risults.
When you got started with C/C++, were you writing plain english to do
programs?
Far away to be a flame, each language have its own grammar that some time it
will need to be learnt.
Therefore, even myself still bad to write english, since my mind thinking
italian sentences.



From skanemupp at yahoo.se  Mon May  5 08:03:39 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 05:03:39 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
Message-ID: <5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>

On 5 Maj, 13:47, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev wrote:
> >http://www.pygame.org/docs/ref/mixer.html
>
> > import pygame
>
> > #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> > buffer=3072)  //it complained abiout words=
> > so i guess its only the nbrs should be there//
>
> > pygame.mixer.init(22050, -16, 2, 3072)
> > pygame.mixer.music.load("example1.mp3")
> > pygame.mixer.music.play(loops=1, start=0.0)
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> > <module>
> >     pygame.mixer.music.load("example1.mp3")
> > error: Couldn't read from 'example1.mp3'
>
> Give it the full path to the MP3. Be aware of backward slashes + the need to
> escape them.
>
> Diez

escape them?




import pygame

#pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=3072)
pygame.mixer.init(22050, -16, 2, 3072)
pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
example1.mp3')
pygame.mixer.music.play(loops=1, start=0.0)

Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
<module>
    pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
example1.mp3')
error: Couldn't read from 'C:/Python25/myPrograms/pygameProgs/
example1.mp3'


From arnodel at googlemail.com  Thu May 15 11:53:38 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 16:53:38 +0100
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
	<c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>
	<10cce8be-657c-4c40-9705-baebaf90301b@a70g2000hsh.googlegroups.com>
	<482c428c$0$9669$426a34cc@news.free.fr>
Message-ID: <m2bq37a7i5.fsf@googlemail.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> FWIW, I wonder why the BDFL choosed to implement __new__ as a
> staticmethod - there are probably some pretty good reasons, but not
> knowing them, it looks like __new__ would have been a perfect
> candidate for a classmethod.
>
> So far, the only reason I can think of is that making it a classmethod
> would have required the use of super(Parent, cls) to call the parent's
> class __new__, which may (or may not - never had the case) be
> problematic (any guru on this ?)

Don't know but I remember something about this in 'Unifying types and
classes'.  There it is:

    Factoid: __new__ is a static method, not a class method. I
    initially thought it would have to be a class method, and that's
    why I added the classmethod primitive. Unfortunately, with class
    methods, upcalls don't work right in this case, so I had to make
    it a static method with an explicit class as its first
    argument. Ironically, there are now no known uses for class
    methods in the Python distribution (other than in the test
    suite). I might even get rid of classmethod in a future release if
    no good use for it can be found!

(http://www.python.org/download/releases/2.2/descrintro/)

I don't have the time to try to figure it out :(

-- 
Arnaud


From michele.simionato at gmail.com  Mon May 26 13:50:23 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 26 May 2008 10:50:23 -0700 (PDT)
Subject: About Michele Simionato's "classinitializer" decorator
References: <qaC_j.85793$FR.319565@twister1.libero.it>
Message-ID: <5c215286-6a18-4c13-9ca4-bf9fa9f5679e@m73g2000hsh.googlegroups.com>

On May 26, 7:10 pm, imho <ce... at comeno.it> wrote:
> Hi all.
> I just send this post as a comment to the third part of Michele
> Simionato's article about metaprogramming techniques at:
>
> http://www.ibm.com/developerworks/linux/library/l-pymeta3.html?S_TACT...
>
> I found extremely useful the classinitializer "trick".

I never use it. Too clever. I am waiting for class decorators
in Python 2.6.

> I was thinking
> over the caveat not to call a class initializer after the _metaclass_
> hook (an exception being raised in that case).
> Am I wrong if I state there's a plain solution to this ?

I think your solution is fine. Still, consider waiting for
class decorators ;)

       Michele Simionato



From jurgenex at hotmail.com  Sat May 31 12:48:11 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Sat, 31 May 2008 16:48:11 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
Message-ID: <kjv2441a9im6bcistqcav6c87j4024s2pj@4ax.com>

"szr" <szrRE at szromanMO.comVE> wrote:
>I would rather have the OP comment about that, as he started the thread. 

The OP is a very well-known troll who has the habit of spitting out a
borderline OT article to a bunch of loosly related NGs ever so often and
then sits back and enjoys the complaints and counter-complaints of the
regulars. He doesn't provide anything useful in any of the groups he
targets (at least AFAIK) and he doesn't participate in the resulting
mayhem himself, either. 
He will only go away if everyone just ignores him.

With this in mind another reminder:

         +-------------------+             .:\:\:/:/:.
         |   PLEASE DO NOT   |            :.:\:\:/:/:.:
         |  FEED THE TROLLS  |           :=.' -   - '.=:
         |                   |           '=(\ 9   9 /)='
         |   Thank you,      |              (  (_)  )
         |       Management  |              /`-vvv-'\
         +-------------------+             /         \
                 |  |        @@@          / /|,,,,,|\ \
                 |  |        @@@         /_//  /^\  \\_\
   @x@@x@        |  |         |/         WW(  (   )  )WW
   \||||/        |  |        \|           __\,,\ /,,/__
    \||/         |  |         |      jgs (______Y______)
/\/\/\/\/\/\/\/\//\/\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
==============================================================

Follow-up adjusted.

jue


From zerty.david at gmail.com  Sat May  3 18:37:23 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sat, 3 May 2008 19:37:23 -0300
Subject: Problems with psycopg2
In-Reply-To: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
References: <5dc598e30805011731g1022de5bq750f890a284e5880@mail.gmail.com>
Message-ID: <5dc598e30805031537x20729eaarc611d1a12bfbdc91@mail.gmail.com>

The thing is this query works fine on the console through psql, but not in
my code? can anyone explain me why?

On Thu, May 1, 2008 at 9:31 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Hi all
> I have this function:
> def checkName(self, name):
>         cur = self.conn.cursor()
>
>         sql = "SELECT * from patient WHERE fn_pat = '" + name + "'"
>         cur.execute(sql)
>         rows = cur.fetchall()
>
>         if rows == "[]":
>             self.insert()
>
> It seems to work fine, But I'm getting this exception:
> psycopg2.ProgrammingError: current transaction is aborted, commands
> ignored until end of transaction block
> at: cur.execute(sql)
>
> What's the problem?
> thx
>
> ps: fn_pat is the column of the db, name is the string passed in the
> function parameter
>
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From prudek at bvx.cz  Sat May 24 17:59:27 2008
From: prudek at bvx.cz (Milos Prudek)
Date: Sat, 24 May 2008 23:59:27 +0200
Subject: module import problem
Message-ID: <200805242359.27995.prudek@bvx.cz>

I have a Kubuntu upgrade script that fails to run:

File "/tmp/kde-root//DistUpgradeFetcherCore.py", 
line 34, in <module>
import GnuPGInterface
ImportError
No module named GnuPGInterface

I got a folder /usr/share/python-support/python-gnupginterface with 
a "GnuPGInterface.py" but no __init__.py.

In python command line, print sys.path shows that /usr/share/python-support/ 
is not among python paths.

If I cd into /usr/share/python-support/python-gnupginterface and launch Python 
I can "import GnuPGInterface". But when I run DistUpgradeFetcherCore.py in 
that folder it always fails with No module named GnuPGInterface.

 I do not know much about setting python path. 

-- 
Milos Prudek


From terry6394 at gmail.com  Wed May 28 12:01:40 2008
From: terry6394 at gmail.com (Cyril.Liu)
Date: Thu, 29 May 2008 00:01:40 +0800
Subject: =?GB2312?B?x+u9zCy52NPaUHl0aG9uttS24LSmwO3G97XE1qez1qOsUHl0aA==?=
	=?GB2312?B?b27U2kFJWM/CtatDUFW1xNCnwsqxyLbgQ1BVtcTQp8LKuN8/?=
Message-ID: <6d2d06b10805280901k1aa7db70g4aa8ba3c622a8db0@mail.gmail.com>

??????????????????????C +
Python????????????????????????C????????????????????????????????????????????????????????????????Python??????????Python??????????????????????????Python??????
AIX????????????????????????????????????????????????????????????????????????GIL????????????????Python????????????????????Python??????lib??????????????????????????????????????DB2,
??????????????????????C??????????DB API??
??????????????????????????????????????????????????????????????????????????????????????????????????????????????
????????????Python????????????????????????????????????C??????????????????????????????????????????????????????????????!

Python?????? 2.4
????: AIX 5.3
DB: DB2 8.2
-- 
About Cyril.Liu
-----------------------------------
Cyril
????????????,
??????????????,
??????????????:"????????????????????????"
http://blog.405studio.cn/
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From exarkun at divmod.com  Tue May 13 20:59:28 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 20:59:28 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <20080514005603.6859.2106502900.divmod.quotient.63149@ohm>
Message-ID: <20080514005928.6859.2036301568.divmod.quotient.63150@ohm>

On Tue, 13 May 2008 20:56:03 -0400, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>On Tue, 13 May 2008 16:44:11 -0700 (PDT), Giampaolo Rodola' 
><gnewsg at gmail.com> wrote:
>>
>>[snip]
>>>
>>>To support scheduling calls, you just have to know when the next call is
>>>going to happen.  Then, you can wake up at exactly that time.  This is
>>>what Twisted does, even for select reactor. ;)
>>
>>Yes but how do you know when it's the time to fire up a call without
>>using a thread?
>>You are forced to call time.time() periodically and check if that time
>>had come every time.
>>Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
>>That's where that should happen.
>
>Why?  Isn't this why subtraction exists?  If there is a call scheduled to
>happen at T1 and the current time is T2, then I know that after (T1 - T2)
>elapses, it will be time to run the call.  Why do I have to do any checks
>at all?  I just tell select() to wait that long.  Presumably this is just
>what someone will do if they want to use asyncore with timed calls.  Call
>asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

Ah, of course this is wrong, since asyncore.loop... loops. :P  I meant to
say asyncore.poll() here.

>So, actually, I'm not sure what the disagreement is about. ;)  The
>default value for the timeout parameter to the loop function seems
>somewhat irrelevant.  If someone wants timed events in their loop,
>asyncore isn't standing in their way.  On the other hand, I didn't
>this thread (or maybe just this part of the thread) start out with
>a question about asyncore throughput?  I have no idea what that
>might have to do with this.
>
>Jean-Paul


From lists at svrinformatica.it  Fri May 23 03:20:45 2008
From: lists at svrinformatica.it (Mailing List SVR)
Date: Fri, 23 May 2008 09:20:45 +0200
Subject: Python treeview and recursion: help needed
Message-ID: <1211527245.7401.3.camel@localhost.localdomain>

?Hi, 

I have a database with the following structure:

id    name  sublevel

for example

1     Node1     None
2     Node2     1
3     Node3     2
4     Node4     None
5     Node5     1
6     Node6     5
....
....


where Node1 and Node4 are treeview's master nodes, Node2 is a subnode of
Node1, Node3 is a subnode of Node2, Node5 is a subnode of Node1 and
Node6 a subnode of Node5 and so on

I need a recursive function to populate treeview and I'm stuck on this
function :confused:

I need a list where I have the master node with child node inside and if
a child node as others child nodes, I need thess nodes inside the child
nodes.

Something like this:

[
{"id":1,"name":"Node1","Childs":[{"id:2","name":"Node2","Childs":[{"id":3,"name":"Node3","Childs":[]}]},
{"id":5,
"name":"Node5","Childs":[{"id":6,"name":"Node6","Childs":[]}]}]},{"id":4,"name":"Node4","Childs":[]}  
]

I'm using django so I access the data as 

all=Data.objects.all()

and I can do something like

for a in all:
  print a.id
  print a.name
  
to get database value.

Any help is appreciated,

thanks,
Nicola



From pscott at uwc.ac.za  Mon May  5 10:28:33 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:28:33 +0200
Subject: Nested os.path.join()'s
In-Reply-To: <1209997313.7106.29.camel@paul-laptop>
References: <1209997313.7106.29.camel@paul-laptop>
Message-ID: <1209997713.7106.32.camel@paul-laptop>


On Mon, 2008-05-05 at 16:21 +0200, Paul Scott wrote:
> example:
> 
> if os.path.exists(os.path.join(basedir,picdir)) == True :
>     blah blah
> 

Sorry, pasted the wrong example...

Better example:

 pics =  glob.glob(os.path.join(os.path.join(basedir,picdir),'*'))


> Question is, is there a better way of doing this? The above *works* but
> it looks kinda hackish...

--Paul

-------------- next part --------------
All Email originating from UWC is covered by disclaimer 
http://www.uwc.ac.za/portal/public/portal_services/disclaimer.htm 

From pavlovevidence at gmail.com  Sat May 17 02:09:51 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 23:09:51 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <95854850-a48a-4ce9-a55e-5820d0651925@b64g2000hsa.googlegroups.com>

On May 16, 4:46 am, "??" <littlesweetme... at gmail.com> wrote:
> Howdy,
>     I wonder why below does not work.
>
> a = object()
> a.b = 1        # dynamic bind attribute failed...
>
> To make it correct, we have to create a new class:
> class MyClass(object): pass
> a = MyClass()
> a.b = 1       # OK
>
> Does this strange behavior break the LSP (Liskov substitution principle)?


I suspect it's possible to come up with a property that causes LSP to
be violated for any two given distinct classes.

For example, if the property you're considering is "Raises an
exception when you try to access an attribute", then yes, the subtype
cannot be substituted for the base type and would violate LSP.
However, that's not really such a useful property in most cases.

The reason instances of object don't have dynamic attributes is
because dyanmic attributes are internally represented by a dict
object.  To keep memory footprint low, instances of many built-in
types don't have an associated dict and so can't bind attributes
dynamically.  Instances of object can't have an associated dict
because, if they did, it would mean all objects would have to have an
associated dict, because all types are subclasses of object.

Because of this, direct instances of object really don't have much use
in Python.  It's one main use case is as a sentinel or marker of some
sort.  It's only useful property is that it is itself, and nothing
else.  But, that property is true of all instances in Python;
therefore any instance may be substituted for an object instances,
therefore it satisfies LSP.

(Phew: what a tangle of nomenclature that was.)


Carl Banks


From skunkwerk at gmail.com  Fri May  9 11:40:38 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Fri, 9 May 2008 08:40:38 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
Message-ID: <7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>

On May 9, 12:12?am, John Nagle <na... at animats.com> wrote:
> skunkwerk wrote:
> > i'm getting the wrong output for the 'title' attributes for this
> > data. ?the queue holds a data structure (item name, position, and list
> > to store results in). ?each thread takes in an item name and queries a
> > database for various attributes. ?from the debug statements the item
> > names are being retrieved correctly, but the attributes returned are
> > those of other items in the queue - not its own item. ?however, the
> > model variable is not a global variable... so i'm not sure what's
> > wrong.
>
> > i've declared a bunch of workerthreads(100) and a queue into which
> > new requests are inserted, like so:
>
> > queue = Queue.Queue(0)
> > ?WORKERS=100
> > for i in range(WORKERS):
> > ? ?thread = SDBThread(queue)
> > ? ?thread.setDaemon(True)
> > ? ?thread.start()
>
> > the thread:
>
> > class SimpleDBThread ( threading.Thread ):
> > ? ?def __init__ ( self, queue ):
> > ? ? ? ? ? ?self.__queue = queue
> > ? ? ? ? ? ?threading.Thread.__init__ ( self )
> > ? ?def run ( self ):
> > ? ? ? ? ? ?while 1:
> > ? ? ? ? ? ? ? ? ? ?item = self.__queue.get()
> > ? ? ? ? ? ? ? ? ? ?if item!=None:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?model = domain.get_item(item[0])
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug('sdbthread item:'+item[0])
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?title = model['title']
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?scraped = model['scraped']
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug("sdbthread title:"+title)
>
> > any suggestions?
> > thanks
>
> ? ?Hm. ?We don't have enough code here to see what's wrong.
> For one thing, we're not seeing how items get put on the queue. ?The
> trouble might be at the "put" end.
>
> ? ?Make sure that "model", "item", "title", and "scraped" are not globals.
> Remember, any assignment to them in a global context makes them a global.
>
> ? ?You should never get "None" from the queue unless you put a "None"
> on the queue. ?"get()" blocks until there's work to do.
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? John Nagle

thanks John, Gabriel,
  here's the 'put' side of the requests:

def prepSDBSearch(results):
	modelList = [0]
	counter=1
	for result in results:
		data = [result.item, counter, modelList]
		queue.put(data)
		counter+=1
	while modelList[0] < len(results):
		print 'waiting...'#wait for them to come home
	modelList.pop(0)#now remove '0'
	return modelList

responses to your follow ups:
1)  'item' in the threads is a list that corresponds to the 'data'
list in the above function.  it's not global, and the initial values
seem ok, but i'm not sure if every time i pass in data to the queue it
passes in the same memory address or declares a new 'data' list (which
I guess is what I want)
2)  john, i don't think any of the variables you mentioned are
global.  the 'none' check was just for extra safety.
3)  the first item in the modelList is a counter that keeps track of
the number of threads for this call that have completed - is there any
better way of doing this?

thanks again


From bignose+hates-spam at benfinney.id.au  Sun May 11 23:41:25 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 13:41:25 +1000
Subject: Convention for name indicating "don't care about the value" (was: Is
	using range() in for loops really Pythonic?)
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
Message-ID: <8763tk89zu.fsf_-_@benfinney.id.au>

Carl Banks <pavlovevidence at gmail.com> writes:

> On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > In such cases, the name 'dummy' is conventionally bound to the items
> > from the iterator, for clarity of purpose::
> >
> >     for dummy in range(10):
> >         # do stuff that makes no reference to 'dummy'
> 
> Is this documented?

It's not a documented standard, to my knowledge.

> I've never heard of this convention. It's not PEP 8, and I've never
> seen consistent usage of any name. I'd be interested in knowing
> where you read that this was a convention, or in what subcommunities
> it's a convention in.

It has been in this forum that the use of the name '_' for "don't care
about the value" was deprecated, since that name is already overloaded
with other meanings.

> I think dummy is a terrible name to use for this, since in no other
> usage I can think of does the word "dummy" suggest something isn't
> used.

I think it's far superior to '_'. I'd be just as happy with any other
name that explicitly distinguishes itself for this purpose.

> If a value isn't used, then I think the most clear name for it is
> "unused".

Sounds good to me. Now we merely need to convince the world.

-- 
 \      ?Software patents provide one more means of controlling access |
  `\      to information. They are the tool of choice for the internet |
_o__)                                     highwayman.? ?Anthony Taylor |
Ben Finney


From yves at zioup.com  Fri May  9 00:47:49 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 04:47:49 GMT
Subject: python newbie: some surprises
In-Reply-To: <64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
Message-ID: <VHQUj.124646$Cj7.90968@pd7urf2no>

Mensanator wrote:
>> 2. python requires to pass "self" to all instance methods
> 
> Who uses methods?

Is this a joke ?
What are the alternatives ?


> 
>> and I missed ":" often. :)
> 
> Try using something like Seed7, where you have to use "then" with
> "if" and "do" with "while" and "end" in every block. Maybe you'll
> come to appreciate significant whitespace and ":".

I see the point of the OP. Couldn't the new-line be used as an equivalent of 
  ':', for example, do you find this difficult to read:

if a == 3
   do_something()


if a == 3: do_something()


And surely, it should be easy to parse by the compiler.

Yves.
http://www.SollerS.ca


From kirby.urner at gmail.com  Mon May 12 23:36:53 2008
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: Mon, 12 May 2008 20:36:53 -0700 (PDT)
Subject: Chinese names in Python source
Message-ID: <72f078a8-a9e3-4b1c-8f21-ea5633654672@b5g2000pri.googlegroups.com>


It's probably not news to anyone here that Python 3 gives us
access to the unicode codespace for Python names, not just
string literals, meaning our functions and classes, lists and
dictionaries, might go outside Latin-1 for their source code
representation.

I have an example in my blog:
http://mybizmo.blogspot.com/2008/05/chinese-names-in-python.html

If others have Python source with names in other languages,
that might be fun to see.  Images are probably better than actual
source code, as it's up to the font library to render unicode
properly and many Python text editors aren't prepared to render
all these characters (yet).

I used lucidabright in IDLE for my screen shot (Ubuntu 8.4 laptop).

Kirby
Portland, OR


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 11:23:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 17:23:15 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <48343e56$0$5866$426a74cc@news.free.fr>

Dave Parker a ?crit :
>> Or just:
>>
>> If command is "quit" ...
> 
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
> 
>      Read data from "input.txt".
>      If data is an error then go to ...

Arf ! A goto !

> Or when assigning a type to an identifier:
> 
>      HarmonicMean is a function(x, y) ...
>      LoopCount is a variable ...
> 
> By using = only for equality and "is" only for types, the Flaming
> Thunder compiler can detect when either is being used incorrectly
> because the syntax for the two is incompatible.  That avoids the man-
> years of wasted debugging time spent on languages that accept
> statements that are easily confused, yet syntactically valid (e.g. the
> confusion between = and == in C if-statments, or the confusion between
> = (equality) and "is" (identity) in Python).
> 

Actually in Python the equality test is '==', not '='. And since 
Python's types are objects - which is *definitively* a GoodThing(tm) in 
an OOPL -, your point here is moot.

Also, you're overloading the meaning of 'is', which *is* (pun intented) 
confusing too.


From p5secr2 at uni-jena.de  Mon May 19 10:43:47 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:43:47 +0200
Subject: scope of optional arguments
References: <g0s2v3$fa6$01$1@news.t-online.com>
Message-ID: <g0s3ne$mb6$03$1@news.t-online.com>

Whoops, I meant to call

print walk([1,2,3], [])
print walk([4,5,6])

and

print walk([1,2,3])
print walk([4,5,6])

with

def walk(seq, result = []):
  for item in seq:
    result.append(item)
  return result

The question is still the same: Why do both calls give different results?

Thank you very much for reading, I'm sorry for the inconvenience. 




From metallourlante at gmail.com  Sun May 18 16:06:10 2008
From: metallourlante at gmail.com (Alex)
Date: Sun, 18 May 2008 13:06:10 -0700 (PDT)
Subject: is there a bug in urlunparse/urlunsplit
Message-ID: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>

Hi all.

Is there a bug in the urlunparse/urlunsplit functions?
Look at this fragment (I know is quite silly):

urlunparse(urlparse('www.example.org','http'))
---> 'http:///www.example.org'
           ^^^^^

There are too many slashes, isn't it? Is it a known bug or maybe I
missed something...

Alex



From __peter__ at web.de  Thu May 15 03:06:19 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 15 May 2008 09:06:19 +0200
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
Message-ID: <g0gndb$3vt$03$1@news.t-online.com>

George Sakkis wrote:

> I spent several hours debugging some bogus data results that turned
> out to be caused by the fact that heapq.nlargest doesn't respect rich
> comparisons:
> 
>     import heapq
>     import random
> 
>     class X(object):
>         def __init__(self, x): self.x=x
>         def __repr__(self): return 'X(%s)' % self.x
>         if True:
>             # this succeeds
>             def __cmp__(self, other): return cmp(self.x , other.x)
>         else:
>             # this fails
>             def __lt__(self, other): return self.x < other.x
> 
>     s = [X(i) for i in range(10)]
>     random.shuffle(s)
> 
>     s1 = heapq.nlargest(5, s)
>     s2 = sorted(s, reverse=True)[:5]
>     assert s1 == s2, (s,s1,s2)
> 
>     s1 = heapq.nsmallest(5, s)
>     s2 = sorted(s)[:5]
>     assert s1 == s2, (s,s1,s2)
> 
> 
> According to the docs, nlargest is equivalent to: "sorted(iterable,
> key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> be at least a documentation bug, if not an implementation one.

Implementing a subset of the rich comparisons is always dangerous. According
to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
work:

import heapq
import random

used_rich = set()

class X(object):
    def __init__(self, x): self.x=x
    def __repr__(self): return 'X(%s)' % self.x
    def __lt__(self, other):
        used_rich.add("lt")
        return self.x < other.x
    def __eq__(self, other): 
        used_rich.add("eq")
        return self.x == other.x
    def __gt__(self, other):
        used_rich.add("gt")
        return self.x > other.x
    def __ge__(self, other):
        used_rich.add("ge")
        return self.x >= other.x
    def __ne__(self, other):
        used_rich.add("ne")
        return self.x != other.x
    def __le__(self, other):
        used_rich.add("le")
        return self.x <= other.x

s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]

smallest = sorted(s)[:5]
largest = sorted(s, reverse=True)[:5]

print "used by sorted:", used_rich
used_rich = set()

for i in range(10000):

    s1 = heapq.nlargest(5, s)
    assert s1 == largest, (s, s1, largest)

    s1 = heapq.nsmallest(5, s)
    assert s1 == smallest, (s, s1, smallest)

    random.shuffle(s)

print "used by nlargest/nsmallest:", used_rich

Output:
used by sorted: set(['lt'])
used by nlargest/nsmallest: set(['lt', 'le', 'eq'])

Peter


From inhahe at gmail.com  Wed May 21 12:50:37 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 12:50:37 -0400
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
	<FJXYj.78134$%15.20121@bignews7.bellsouth.net>
Message-ID: <KoYYj.52545$3v1.22082@bignews3.bellsouth.net>

>>
>> One thing I hate from C is the assignment in expressions...Forcing
>> myself to write
>> 0 == Something
>> rather than
>> Something == 0
>
> interesting trick, i've never thought of that/seen it
> although if Python implemented it I think it should default to giving 
> warnings when you use = in an expression, that way you don't have to 
> worry.
>

That introduces complications though, do you want to see a pagefull of 
warnings every time you import a module that uses the ='s?
You could specify in your python file that you want to suppress that 
warning, but then you'd never know when you used = by accident when you 
meant to use ==.
anyway i was thinking you could have a second assignment operator to use 
just in expressions, and only allow that.  it could be := since some 
languages tend to use that. i wouldn't like it as a general assignment 
operator but assignment in expressions is a special case.   also <- or ->. 
C uses -> for functions but I think math/calculators use that for 
assignment.






From lists at cheimes.de  Fri May  2 15:46:54 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:46:54 +0200
Subject: IPv6 and Python
In-Reply-To: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <481B6FAE.6070505@cheimes.de>

Giampaolo Rodola' schrieb:
> I'm not sure if this is a question about python programming, system
> administration or sockets in general...
> I have the FTP server in my signature to which I'd want to add IPv6
> support.
> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?

Python supports IPv6 out of the box if the underlying OS supports it,
too. You just have to use AF_INET6 instead of AF_INET:

import socket
sock = socket.socket(sock.AF_INET6, socket.AF_STREAM) # IPv6
sock.bind(("::1", 21)) # bind to IPv6 localhost

That's it.

Christian



From bj_666 at gmx.net  Thu May  8 10:26:50 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 14:26:50 GMT
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
	<68gcn4F2su97jU1@mid.uni-berlin.de> <fvv0cg$rsh$1@aioe.org>
Message-ID: <68ggtaF2su97jU2@mid.uni-berlin.de>

On Thu, 08 May 2008 15:49:01 +0200, pistacchio wrote:

> Marc 'BlackJack' Rintsch ha scritto:
>> On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:
>> 
>>> Are you a newbie to Python, or to programming in general? I'll assume
>>> you are a newbie to programming in general because of that last
>>> question you asked. Things in Python are easier than in almost any
>>> other programming language. Here are three Hello World programs:
>> 
>> Counterexamples for quite short "greetings" in other programming languages:
>> 
>> (Free)BASIC::
>> 
>>   Print "Hello World!"
> 
> freebasic is another language i'd point out to a newbie, even if it is 
> not as multiplatform as python if. it has a decent community and a large 
> amount of libraries. it doesn't let you explore functional or, worse, 
> object oriented programming nor you can write server side programs with
> it.

OOP support is under development and why can't you write "server side
programs" in it?  CGI is possible.

> The others are examples of easy "hello world" languages, but, passed
> that, i think they don't have the same capabilities of python on terms
> of support, kind of programs you can write and even overall complexity
> (haskell forces you to functional programming, io is really a minor
> language, ocalm forces you to di OOP and, if writing hello world is
> simple, on the other hand ir may have lines of code that read like:
> 
> | [] -> []

Okay, Haskell's pure functional approach feels somewhat "weird".

Io is a minor language but a quite nice one IMHO.  Simple syntax and
relatively simple semantics but very powerful.

OCaml doesn't enforce OOP.  It's some kind of "mirror" of Python.  Python
is an OOP language with support for functional programming, and OCaml is a
functional language with support for OOP.

The biggest pro for Python among the easy and clear syntax languages is
the standard library and the amount of third party modules.

Ciao,
	Marc 'BlackJack' Rintsch


From danb_83 at yahoo.com  Wed May 28 02:46:07 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Tue, 27 May 2008 23:46:07 -0700 (PDT)
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<mailman.1664.1211934771.12834.python-list@python.org>
Message-ID: <9dd41de1-a992-430e-b710-653d4efa4b64@34g2000hsf.googlegroups.com>

On May 27, 7:32?pm, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> David C. Ullrich wrote:
> > What version added decorators (using the
> > @decorator syntax)?
>
> > (Is there a general way I could have found out the answer myself?)
>
> > Is there a somthing such that "from __future__ import something"
> > will make decorators work in 2.5.2?
>
> > David C. Ullrich
>
> See:
>
> http://www.python.org/doc/2.4/whatsnew/whatsnew24.html
>
> Dunno of a general way view a list of features versus releases, other
> than reading the "What's New in Python x" documents. ?Maybe some
> enterprising developer can compile this list? ?Hint, hint.

>>> [feature for feature in vars(__future__).items() if isinstance(feature[1], __future__._Feature)]
[('nested_scopes', _Feature((2, 1, 0, 'beta', 1), (2, 2, 0, 'alpha',
0), 16)),
 ('division', _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0),
8192)),
 ('with_statement', _Feature((2, 5, 0, 'alpha', 1), (2, 6, 0, 'alpha',
0), 32768)),
 ('absolute_import', _Feature((2, 5, 0, 'alpha', 1), (2, 7, 0,
'alpha', 0), 16384)),
 ('generators', _Feature((2, 2, 0, 'alpha', 1), (2, 3, 0, 'final', 0),
0))]



From tjreedy at udel.edu  Sat May 24 01:11:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 01:11:55 -0400
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com><JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com><8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com><69n463F33hfhfU2@mid.uni-berlin.de><f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com><slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>
	<ce293364-7aef-4c43-8504-5ae353c49406@e39g2000hsf.googlegroups.com>
Message-ID: <g1882s$j5s$1@ger.gmane.org>


"gianluca" <geonomica at gmail.com> wrote in message 
news:ce293364-7aef-4c43-8504-5ae353c49406 at e39g2000hsf.googlegroups.com...
| Thank you for help!
| I've done all you suggest and I've a objdump output like this:
| ...
| [ 86](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003755 _IsCoverRelD
| [ 87](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003657 _IsCoverRelA
| [ 88](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x000034f5 _IsCoverDX
| [ 89](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x0000341b _IsCoverA
| [ 90](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003072 _CoreRelD
| [ 91](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00002f5e _CoreRelA

The name above have one underscore.


| my funtions are the __IsCoverRelD, __IsCoverRelA, etc but when I call
| it (myLIB.__IsCoverRelA or myLIB.__IsCoverRelA()) I've the same
| problem.

These all have two.  So if that is what you actually did....

tjr





From rupole at hotmail.com  Thu May 29 11:41:27 2008
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 29 May 2008 11:41:27 -0400
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
Message-ID: <g1mir9$uvo$1@ger.gmane.org>


Kalibr wrote:
> I've been trying to figure out how to find the details of files
> (specifically music for now) for a little sorting script I'm making,
> My aim is to get details on the artist, album, and genre for mp3 and
> wma files (possibly more in the future). My closest match was when I
> stumbled accross PyMedia, but it only supports up to 2.4 (I have 2.5).
> Now I see a bit mentioned on GetFileVersionInfo, but that doesn't seem
> to help (and most of it went over my head). Is there any module I can
> use to find this sort of data? I'm trying to not make it specialised
> in music, because I may want to extend this to picture, movie, text
> etc. files in the future. Any ideas how I could go about this?

You can use the shell COM objects to access media properties
as shown by Explorer.

import win32com.client
sh=win32com.client.Dispatch('Shell.Application')

folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
ns=sh.NameSpace(folder)

## the column index for Artist may vary from folder to folder
for c in range(0,255):
    colname=ns.GetDetailsOf(None, c)
    if colname=='Artists':  ## This shows up as just Artist on XP
        for i in ns.Items():
            artist=ns.GetDetailsOf(i, c)
            if artist:
                print ns.GetDetailsOf(i, 0), artist
        break


            Roger





From jmillikin at gmail.com  Fri May 30 17:16:20 2008
From: jmillikin at gmail.com (John Millikin)
Date: Fri, 30 May 2008 14:16:20 -0700 (PDT)
Subject: Importing modules from packages with relative imports
Message-ID: <84a95625-791f-4fca-a820-95d2fee0dd78@w1g2000prd.googlegroups.com>

With the old import system, and a package that looks like this:

foo/
  __init__.py
  main.py
  bar/
    __init__.py
    baz.py

If I wanted to delay importing baz until it was actually used, I could
leave the __init__.py files empty and simply "import bar.baz".
However, with the new relative imports syntax, "from . import bar.baz"
causes a syntax error. I could use something like "from .bar import
baz as bar_baz", but that's long, annoying to write, and requires
changing all the uses of "bar.baz.spam" to "bar_baz.spam" through the
file. Is there any way to achieve the "bar.baz" name with relative
imports?


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:20:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:20:35 +0200
Subject: Code/test ratio wrt static vs dynamic typing
In-Reply-To: <87bq30gwjs.fsf@benfinney.id.au>
References: <1ad1c0c4-c1b5-46aa-b26c-0426c86522b4@a70g2000hsh.googlegroups.com>
	<57d73312-37b1-4c53-9669-803e84a6901f@p25g2000hsf.googlegroups.com>
	<cbab2e6d-ace5-4cb2-b57b-780840619a80@27g2000hsf.googlegroups.com>
	<263d5498-821f-4705-9e1d-cc9e97a98e07@34g2000hsf.googlegroups.com>
	<e7ad59f4-7b02-446a-a637-2d6f9249e240@e39g2000hsf.googlegroups.com>
	<69hi0iF32kli9U1@mid.individual.net>
	<87bq30gwjs.fsf@benfinney.id.au>
Message-ID: <48340576$0$10773$426a74cc@news.free.fr>

Ben Finney a ?crit :
> greg <greg at cosc.canterbury.ac.nz> writes:
> 
>> Also, I don't think it's valid to equate the size of the tests with
>> the amount of effort it took to develop them. For instance, the test
>> suite for Pyrex is currently larger than the Pyrex compiler, but
>> I've still spent far more time and effort developing the compiler
>> than writing the tests.
> 
> Right. The unit test suite should tend to increase: add tests far more
> often than removing them. The application code, though, should tend to
> grow less rapidly: 

or even sometimes, at some point, start to shrink, thanks to:

> refactor duplication, remove redundant code,



From popuser at christest2.dc.k12us.com  Wed May  7 11:22:54 2008
From: popuser at christest2.dc.k12us.com (Pop User)
Date: Wed, 07 May 2008 11:22:54 -0400
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <4821C94E.6040500@christest2.dc.k12us.com>

Anton Slesarev wrote:
> 
> But I have some problem with writing performance grep analog.
> 

I don't think you can ever catch grep.  Searching is its only purpose in 
life and its very good at it.  You may be able to come closer, this 
thread relates.

http://groups.google.com/group/comp.lang.python/browse_thread/thread/2f564523f476840a/d9476da5d7a9e466

This relates to the speed of re.  If you don't need regex don't use re. 
  If you do need re an alternate re library might be useful but you 
aren't going to catch grep.




From jonbutler88 at googlemail.com  Wed May 21 18:18:50 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 15:18:50 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com>
Message-ID: <42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com>

On May 21, 11:08?am, alex23 <wuwe... at gmail.com> wrote:
> On May 21, 8:04 pm, alex23 <wuwe... at gmail.com> wrote:
>
> > Is your Spider class a subclass ofHTMLParser? Is it over-riding
> > __init__? If so, is it doing something like:
>
> > ? ? super(Spider, self).__init__()
>
> > If this is your issue[...]
>
> I'm sorry, this really wasn't clear at all. What I meant was that you
> need to call theHTMLParser.__init__ inside your Spider.__init__ in
> order to have it initialise properly. Failing to do so would lead to
> the .rawdata attribute not being defined. The super() function is the
> best way to achieve this.
>
> Sorry for the rambling, hopefully some of that is relevant.
>
> - alex23

Sorry, im new to both python and newsgroups, this is all pretty
confusing. So I need a line in my __init__ function of my class? The
spider class I made inherits from HTMLParser. Its just using the
feed() function that produces errors though, the rest seems to work
fine.

Thanks for the help,
Jon


From ptmcg at austin.rr.com  Mon May 19 15:28:04 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 12:28:04 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<5cc7ef7a-dd21-4772-a7e3-765410f810bb@l17g2000pri.googlegroups.com> 
	<K5YXj.11407$hv2.2783@bignews5.bellsouth.net>
	<081fe61b-820b-4512-80a9-8a0805f3ce55@k13g2000hse.googlegroups.com>
	<m2r6by8el1.fsf@googlemail.com>
Message-ID: <74ce1ffa-0031-4101-8792-5f2ba7f22bca@b64g2000hsa.googlegroups.com>

On May 19, 11:04?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> Paul McGuire <pt... at austin.rr.com> writes:
>
> [...]
>
> Could you use it as a decoratore instead?
>
> integer = Word("0123456789")
>
> @integer.setParseAction
> def parse_integer(tokens):
> ? ? return int(tokens[0])
>
> I could make your grammar clearer, because you don't mix it with
> processing code... and no need for lambdas!
>
> --
> Arnaud

What a sexy little idiom!  You could really apply this to any API
method that accepts a callable as a single argument, and pyparsing
actually has several of these:

setParseAction
addParseAction
setFailAction
setDebugActions

(Unfortunately, setDebugActions requires 3 callables for its arguments
- one to be run when an expression is about to be parsed, one to be
run after parsing is complete, and one to be run if the expression
fails to be parsed.  So setDebugActions can't be used in this
decorator manner.)

Using these methods as decorators deviates from the typical decorator
usage model as I understand it - instead of wrapping the provided
function within some enclosing setup/teardown code (like lock/unlock,
or open-file/close-file, or begin-transaction/commit-transaction), and
then returning the created wrapper function, the decorator usage you
propose is one in which the decorator uses the provided function with
some side-effect (such as setting a property), but then just returns
the original function.  By returning the original function, we could
stack decorators so that multiple expressions could share the same
parse action:

@articleTitle.setParseAction
@movieTitle.setParseAction
@bookTitle.setParseAction
def upcase_title(tokens):
    return " ".join( t.title() for t in tokens )

Here is where I have something of a hitch, with the way pyparsing
implements most setXXX methods.  setParseAction already returns a
value, and the value returned is self.  If you have any Smalltalk
background, this will seem familiar to you.  (Not that I was ever a
big-time Smalltalk coder, but this was one language idiom that you
learned on Day 0.5 or you were lost forever.)  This makes it easy to
chain together a constructor and multiple property setters into a
single expression:

timestamp = Regex(r"\d\d(\/\d\d\){2} \d\d(:\d\d)
{2}").setParseAction(convertTimeStamp).leaveWhitespace().setDebug()

In the case where we have a single parse action shared by multiple
expressions, we have to fall back to:

def upcase_title(tokens):
    return " ".join( t.title() for t in tokens )
articleTitle.setParseAction(upcase_title)
movieTitle.setParseAction(upcase_title)
bookTitle.setParseAction(upcase_title)

But, now that I've looked at this for a while, I may fall back on some
other idioms:
- just because you *can* do something doesn't mean you *should* do it
- explicit is better than implicit

Decorator syntax is already a mysterious topic for many newbies, even
when used for its normal application.  Using a decorator to perform
the same function as an explicit "set" call invokes cleverness at the
cost of clarity.  Using decorators to replace:

def methodX(a,b,c):
    blah
methodX = staticmethod(methodX)

with

@staticmethod
def methodX(a,b,c):
    blah

does have some merits, including DRY.  But using decorator syntax as
an implicit invocation of a set method? It's just taking advantage of
the incidental implementation of the decorator syntax. It would be
like implementing the logic of a for-loop using a list comprehension -
clever, and yes it can be done, but maybe a bit obscure.

-- Paul


From dave.g1234 at gmail.com  Fri May 16 17:23:42 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 14:23:42 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>
Message-ID: <31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>

Thanks for the responses.  I'm well aware that the function can be
passed in the parameters, passing in the functino as an arg defeats
the purpose of what I'm going after.

@ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
but a perfunctory glance looks like we're doing the close to the same
thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
can pass in other parameters to foo. Of course, getting the callers
locals/globals is bad in of itself.

best,
dave


From gagsl-py2 at yahoo.com.ar  Sat May 10 22:23:03 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 23:23:03 -0300
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
Message-ID: <op.uaywwpfax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:37:30 -0300, v4vijayakumar <vijayakumar.subburaj at gmail.com> escribi?:

> On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> v4vijayakumar a ?crit :
>>
>> > When I started coding in python, these two things surprised me.
>>
>> > 1. my code is inconsistently indented with the combination of tabs and
>> > spaces. Even lines looked intended, but it is not.
>>
>> Then you have a problem with your code editor - not with Python.
>>
>
> Editors can not be wrong. :)
>
> I think there should be some way to say python compiler, to consider
> tab and two blank spaces equal, when tab space = 2.

It already considers tab = 8 spaces, and when invoked with -tt it rejects mixed tabs+spaces. (I would like Python rejected *any* tab used for indenting...)
There is a tool 'reindent.py' -somewhere on your Python install-, and an indentation checker 'tabnanny.py' (this one in the standard library).

-- 
Gabriel Genellina



From mcknight0219 at gmail.com  Thu May 15 06:45:30 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 15 May 2008 03:45:30 -0700 (PDT)
Subject: create window on panel
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
	<mailman.1153.1210845280.12834.python-list@python.org>
Message-ID: <93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>

On May 15, 5:54 pm, Laszlo Nagy <gand... at shopzeus.com> wrote:
> Jimmy wrote:
> > Hi, all
>
> > I have been trying to use wxPython to design a GUI that will be
> > displayed on the panel on the top of desktop. that is when the
> > program starts, it will dwell on the panel to display some dynamic
> > information.
>
> > can anyone tell me in wxPython how to do this? thanks!
>
> AFAIK it cannot be done in pure wxPython. The reason is that your
> "panel" is part of the window manager. What kind of "panel" are you
> talking about anyway? Under Microsoft Windows it is called "the tray".
> In Gnome it is "panel" indeed. In KDE it might also be panel, there is
> OS X etc. They are quite different. For example, under MS Windows you
> cannot embed an application into the tray (other than an icon).
>
> They are all different window managers, based on different client libs
> (MS gui, GTK, Qt etc.). wxPython is designed to be platform independent,
> and  it does not support special, platform dependent features. (Well it
> does a few...)
>
> You need to tell us what kind of system are you using? Then we can tell
> you where to start. For example, there are extension modules for writing
> Gnome panel applications. (Well, it is not wxPython but GTK.)
>
> BTW the idea is good: we could have "panel" support in wxPython, but
> since the interface of these panels (and how they should be programmed)
> is very different on different platforms, it would not be easy to implement.
>
>    Laszlo

Thanks for your reply!

I am using Linux+gnome. Actually, what I want is simply a text-region
on the panel
and display some dynamic information on it. Is it hard to do it ?


From mobiledreamers at gmail.com  Wed May 14 03:45:12 2008
From: mobiledreamers at gmail.com (Mark)
Date: Wed, 14 May 2008 00:45:12 -0700
Subject: Help with setting local variables of class
Message-ID: <482A9888.2030207@gmail.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080514/5c373cde/attachment-0001.html>

From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 09:47:55 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 15:47:55 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <482aed83$0$15325$426a74cc@news.free.fr>

Dave Parker a ?crit :
>> 5-10 times faster for what kind of code?
> 
> Mostly numerical analysis

Benches, please ? I mean : benches using Python's numpy or similar 
packages - that is, what anyone doing numerical intensive computation in 
Python would use.

> and CGI scripting.

Is there anyone still doing cgi nowadays ???

  >> I don't see anything that resembles OO features of python, ...
> 
> True.  But in Python, you don't see statically-linked pure-syscall CGI

Hopefully. And you don't see much cgi script at all, because we figured 
much better ways to do web programming.

> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year.  But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

Go tell this to google, youtube etc...

> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
> 
>   Write 10^2.
> 
> but can't understand why another programming language gives the answer
> 8 (Python):
> 
>   Print 10^2

This doesn't "give" 8 - this raises a syntax error.

Please RTFM :
1/ this is 'print', not 'Print'
2/ '^' is the bitwise XOR operator


ok, so not only do you spam this newsgroup, but you're also a clueless 
troll.


From kodifik at eurogaran.com  Thu May  8 04:12:27 2008
From: kodifik at eurogaran.com (kodifik at eurogaran.com)
Date: Thu, 8 May 2008 01:12:27 -0700 (PDT)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
Message-ID: <b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>


> ? ? ? ? ?| ? PLEASE DO NOT ? | ? ? ? ? ? ?:.:\:\:/:/:.:
> ? ? ? ? ?| ?FEED THE TROLLS ?| ? ? ? ? ? :=.' - ? - '.=:

I don't think Xah is trolling here (contrary to his/her habit)
but posing an interesting matter of discussion.

Don't know to which point it fits, but I would like to do some rather
novel comment on operator naming:
As a non native english speaker, the first time I ever encountered the
word "if" was when learning to program. The same can be said of the
other words (for, then, else...) This caused my brain to adscribe them
meanings completely outside the context of everyday language. My point
is that perhaps this is advantageous. So, contrary to tradition (which
considers a desirable goal to write programs as close as possible to
everyday english), I found convenient that programming languages use
words different from the words of my native tongue. I suspect that is
why car and cdr have caught on vs. first end rest.


From ewertman at gmail.com  Sat May 24 10:40:43 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Sat, 24 May 2008 10:40:43 -0400
Subject: unittest: Calling tests in liner number order
In-Reply-To: <a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
Message-ID: <92da89760805240740t46e219c2ueef2aa02e01a7b93@mail.gmail.com>

>I can't relate to anyone that want to oppose a change that would give
>more freedom to a programmer.

While in general I agree with this.. I think in the case of python
part of it's base philosophy seems to be a tendency to encourage a
single way of doing things, and create a path of least resistance to
the "best" way.  "best" in this case being one or a handful of peoples
opinion.  I'm really ok with this, personally.  I think it's working
well.

So.. I'll post this because I'm sure at least one person hasn't seen it:

>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!


From rdm at rcblue.com  Wed May 28 13:05:10 2008
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 28 May 2008 10:05:10 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
Message-ID: <20080528170522.91AE01E4008@bag.python.org>


Date: Wed, 28 May 2008 11:29:59 -0400
From: "Sean Azelton" <sazelton at nd.edu>
To: Tutor at python.org
Subject: Re: [Tutor] A video introducing Ulipad, an IDE mainly for Python

For those looking for the codec and not running Windows, you can find
it here for Mac OS X as well

http://www.techsmith.com/download/codecs.asp



From sipickles at hotmail.com  Fri May  2 14:27:56 2008
From: sipickles at hotmail.com (Simon Pickles)
Date: Fri, 02 May 2008 19:27:56 +0100
Subject: Writing elapsed time as a string
Message-ID: <BAY114-DAV1382E1C44054F4D69AFE50BEDA0@phx.gbl>

Hello.

I'm sorry if this has been asked a thousand (million) times.

Is there a nifty pythonesque way to produce a string representing an 
elapsed time period, in terms of years, months, days, hours, mins, seconds?

I am storing times in a MySQL db, and would love to be able to write the 
time elapsed between accesses of certain data. These are in seconds 
since the epoch, as produced by time.time()

It is probable right in front of me in the docs but I am spinning off 
into outer space (mentally!)

Thanks for the temporary loan of your clarity and experience.

Simon
-- 

http://www.squirtual-reality.com
--------------------------------
Linux user #458601 - http://counter.li.org.





From rhamph at gmail.com  Sun May 11 12:21:12 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sun, 11 May 2008 09:21:12 -0700 (PDT)
Subject: Unimport statement
References: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
	<mailman.937.1210494391.12834.python-list@python.org>
Message-ID: <e4c860ed-db18-4f6c-9284-5978027bf6a0@f24g2000prh.googlegroups.com>

On May 11, 2:13 am, Filip ?t?dronsk? <regn... at seznam.cz> wrote:
> The main problem are references to objects within a module, because
> we can NEVER be sure there aren't any, even though we cleaned up
> everything, that's just a consequence of Python nature. We can keep
> the old objects referenced and it would make an equivalent to the
> reload() builting, just without loading the module, in effect the
> same as removing it from sys.modules and deleting imported references.
> I do not see any possibe clean way to unload a module...

With the finalizer changes in safethread I think I could pull it off.
Put the module in a cycle, add a weakref to it, remove it from
sys.modules, then run a full collection.  If the weakref clears,
success.  If the weakref doesn't clear, module isn't deleted, readd it
to sys.modules, clean up, and raise an exception.  It won't always
remove the module, but it will do so safely and atomically.

The finalizer changes are necessary as current Python will run __del__
and weakref callbacks as it deletes the module.  It may get
resurrected, get only half done, etc.  Nasty stuff.


From subhabrata.iisc at hotmail.com  Wed May 28 04:08:13 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Wed, 28 May 2008 01:08:13 -0700 (PDT)
Subject: Creating a web page with Python
References: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>
	<e8e4e940-dc6f-4396-be84-561f1a7e87dd@2g2000hsn.googlegroups.com>
Message-ID: <81aecbd7-122e-437e-a47f-8c5ed149e81e@d19g2000prm.googlegroups.com>

Dear Mike,
Thanx your solutions came to the very point. And you understood the
problem so nicely. It is just perfect.
Great.
Regards,
Subhabrata Banerjee.

Mike Driscoll wrote:
> On May 27, 9:25?am, subhabrata.i... at hotmail.com wrote:
> > Dear Members of the group,
> > If any one can help me with an idea how to create a web page with
> > python? Do I have to use vbscript or something like that? I also want
> > to embed the function in the button of a form. How can I do it in
> > Python?
> > Regards,
> > Subhabrata Banerjee.
>
>
> There are many ways to do this. You can use Python kind of like cgi:
>
> http://www.python.org/doc/essays/ppt/sd99east/index.htm
> http://docs.python.org/lib/module-cgi.html
>
> WSGI: http://www.wsgi.org/wsgi
>
> Web Frameworks: Django, TurboGears, Pylons, mod-python, Zope/Plone
>
> Or you might just want to browse Python's wiki:
>
> http://wiki.python.org/moin/WebProgramming
>
> Mike


From nrohan at gmail.com  Mon May 26 04:35:05 2008
From: nrohan at gmail.com (Rohan)
Date: Mon, 26 May 2008 01:35:05 -0700 (PDT)
Subject: CGI question
Message-ID: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>

Hi

I have python-CGIs for my web application running on apache 2.
Few of the CGIs run for a long time.

When such a CGI is running and user presses "Stop" button of browser
(or connection is aborted) how can I identify such situation and
terminate
the CGI.
I don't want the CGI to complete the processing and terminate when it
tries to write to client pipe.
It would be good to terminate it as soon as client connection is
aborted.

How can I achieve this?

Any help is appreciated!

Thanks
Rohan


From __peter__ at web.de  Thu May 22 15:13:36 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 May 2008 21:13:36 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <g14gkp$gs2$01$1@news.t-online.com>

Joel Koltner wrote:

> Is there an easy way to get a list comprehension to produce a flat list
> of, say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn
> this back into what I want, but I was hoping there's some way to avoid the
> "lists of lists" generation in the first place?


>>> [x*y for x in range(4) for y in 1,2]
[0, 0, 1, 2, 2, 4, 3, 6]


> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip"
> to do so?

>>> items = [None] * 6
>>> items[::2] = 1,2,3
>>> items[1::2] = 4,5,6
>>> items
[1, 4, 2, 5, 3, 6]

Peter


From matthias.blaesing at rwth-aachen.de  Wed May 28 14:07:16 2008
From: matthias.blaesing at rwth-aachen.de (Matthias =?iso-8859-1?q?Bl=E4sing?=)
Date: 28 May 2008 18:07:16 GMT
Subject: convert string number to real number - ValueError: invalid 
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
	<mailman.1676.1211955740.12834.python-list@python.org>
	<a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>
Message-ID: <pan.2008.05.28.18.07.20@rwth-aachen.de>

Am Wed, 28 May 2008 10:41:51 -0700 schrieb davidj411:

> I like the str2num function approach, but then i get left with a float
> that has more than 2 decimal spaces , i.e. 11.50 becomes
> 11.449999999999999 and round will not fix that.

Welcome to the wonderful world of floating point numbers. For your usage 
you want 10-based numbers. Have a look at the decimal module:

>>> from  decimal import Decimal
>>> a = Decimal("11.45")
>>> a
Decimal("11.45")
>>> str(a)
'11.45'
>>> a + 1
Decimal("12.45")
>>> a + Decimal("1.55")
Decimal("13.00")

HTH

Matthias


From notnorwegian at yahoo.se  Mon May 26 16:51:46 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 13:51:46 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com> 
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>
Message-ID: <6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>

On 26 Maj, 22:16, miller.pau... at gmail.com wrote:
> On May 26, 3:56 pm, notnorweg... at yahoo.se wrote:
>
> > is the first example here a layer between machine and the second
> > example?
>
> My first example was intended to be C, or at least close to it.  The
> second example is Python.  I consider the C snippet to be low-level,
> while the corresponding Python is high-level.  There are simply fewer
> extraneous details for me to worry about at the Python level, and
> that's why I prefer to work with Python over C when practical.

i know one is C and one i spython, iwas talking more at a conceptual
level and i know cpython is written in C.

what im asking is can a highlevellanguage be written directly on top
of the machine or a highlevellanguage is always written on top of a
lowlevellanguage?

i eman do they have basic operators that are more abstract in their
nature?


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 12:00:47 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 18:00:47 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
	<ahmd345p4u0987mh7fj5o38cs22nvjj3r0@4ax.com>
Message-ID: <4836ea15$0$23643$426a74cc@news.free.fr>

David C. Ullrich a ?crit :
> On Fri, 23 May 2008 09:13:50 -0400, "John Salerno"
> <johnjsal at NOSPAMgmail.com> wrote:
> 
>> "Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
>> message news:4836747b$0$15488$426a74cc at news.free.fr...
>>> Ever heard of the "Model/View/Controller" pattern ?
>> Yes, I have, but I probably don't understand it well enough yet. For 
>> example, I don't  really know what is meant by phrases like "build a model", 
>> "the view registers itself with the model", "interations are sent to the 
>> appropriate controller" -- I may understand them literally, but I get the 
>> feeling that the implementation of these ideas are beyond me. 
> 
> I doubt that.
> 
> I've done things like this. I ended up with just a Model and a View,
> no Controller.

In the code snippet you gave, you do have the controller part - it's 
just merged with the view. Thruth is that the controller part does not 
map to a single, explicit, obvious *component*. It  in fact often 
happens that the controller bits are handled by various components of 
the system.

In the case of most modern GUI toolkits, the OS and GUI toolkit handles 
the first part of the controller stuff : mapping user actions to 
appropriate events, then mapping events to event handlers 
functions/methods - which, since views and controllers are usually 
tightky coupled, are most often than not methods of the view object 
itself - either because the GUI toolkit requires it or because the coder 
found it simpler and more obvious. Now even in the first case, you can 
still factor the controller part out of the view, and have the view's 
event handlers call on the controller. This may help unit-testing both 
the controller and the view and avoid having too much logic into the 
view itself.



From lists at cheimes.de  Mon May 12 14:06:03 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 12 May 2008 20:06:03 +0200
Subject: execfile python3k
In-Reply-To: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>
References: <a41c6590-c0fc-4dc1-a048-83bc0591fe5a@26g2000hsk.googlegroups.com>
Message-ID: <g0a0ub$nbf$1@ger.gmane.org>

Odys schrieb:
> Hi there,
> 
> Since execfile() is removed in Python 3.0
> I have question about using exec.
> 
> I know about
>   exec(open('filename').read())
> but from documentation the 1st arg of exec can be 'file object'.
> However
>    exec(open('filename'))
> does not work.
> Does anybody have idea how to construct 'file object' then?

It's a know bug in Python 3.0.

Christian



From florencio.cano at gmail.com  Fri May  9 04:41:07 2008
From: florencio.cano at gmail.com (Florencio Cano)
Date: Fri, 9 May 2008 10:41:07 +0200
Subject: Best technology for agent/web server architecture
In-Reply-To: <4823268D.1060602@egenix.com>
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
	<4823268D.1060602@egenix.com>
Message-ID: <c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>

I have control over agent and client but I'm not sure how to use
pickle for this task. Do you suggest to pickle the objects that I want
to send and send it over a usual socket? I have searched a bit in
Google and I have seen that Pickle is insecure by default. What do you
think about this?

2008/5/8 M.-A. Lemburg <mal at egenix.com>:

> SOAP would be a good choice if you want to send to data to other
> servers as well, e.g. Java-based ones.
>
> XML-RPC and JSON are better for simple data structures.
>
> If you have control over both client and server and don't
> need to bother with other backends or frontends, Python
> pickle is the best choice.


From s0suk3 at gmail.com  Wed May 14 00:28:37 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 13 May 2008 21:28:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <7d061dcc-b2ae-4c0e-b314-2c4eb92adce0@e39g2000hsf.googlegroups.com>

On May 13, 10:24 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> >  The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps.  Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>

It doesn't matter if it's $19.95 or $0.1; why would anyone even bother
looking at such a weird and unconventional language? And why do you
bring up books? Are Flaming Thunder books free? (I doubt there's even
one).

> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).

Easier? Such an unconventionality? I don't think anybody will ever
need an easier language than Python; Python touched bottom on that
area.

> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables).  So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.

I doubt that any Python "user" (please don't say, "user", Python
programmers are not customers of some clunky proprietary product,
they're programmers using a open source tool) has ever touched
"Flaming Thunder", or anything that even looks like that, since Python
programmers are somewhat more conventional, more like in the C lang,
so they may use things like Java, C/C++, but never something that says
"Set this to this"...

Also, Python is relatively slow, compared to compiled languages. But
if anyone wants speed, they'll go for C, which can be around 50-200
times faster than Python. It's speed of development versus speed of
execution. So why would anyone use such an unconventional thing like
your language, which is statically typed (is it?), if they would only
gain from 5-10 times faster?

> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.  This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.

You claim that "repeat n times" if better than for loops (it's "for",
not "FOR"). It's a matter of taste. But just out of a wild guess, I'd
say one 100% of the developers around the world (except you) will
always prefer for loops rather than your weird thing.

> Python has been around about 15 years, yet still has those
> awkwardnesses.  Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed.  The difference: I
> can't afford to ignore users.

Again, if may be awkward for you, but most of us around here (well,
all, really) will never try to program something by saying
"repeat..." (as I said, it's a matter of taste, and you have a pretty
weird taste).

Now, let's be realistic for a moment. The big crack you call a
programming language will never get any attention. So get out of home
and go get a life.


From Dominique.Holzwarth at ch.delarue.com  Mon May 26 04:31:27 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Mon, 26 May 2008 09:31:27 +0100
Subject: Writing traceback of an exception into a log-file
Message-ID: <5213E58D85BC414998FA553C701E386C0EF281CB4D@SGBD012511.dlrmail.ad.delarue.com>


Hi all

I'm trying to write the traceback stack of an exception that is thrown into a log file, but currently all that's written is simply a "None" :-/

Here's some example code of what I'm doing:

Import traceback
class myException(Exception):
        def __init__(self):
                f = open('filename.txt', 'a')
                traceback.print_exc(file=f)
                f.close()

The file handling (opening etc) works ok (I'm using the same file in combination with a Logger() object too) but the string written to the file is effectively just a "None".

Could anyone explain to me how to properly use the traceback module with it's countless of functions? =)

Thanks in advance,
Dominique


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From bignose+hates-spam at benfinney.id.au  Tue May 13 19:34:31 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:34:31 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
Message-ID: <87ve1h4w3c.fsf@benfinney.id.au>

John Nagle <nagle at animats.com> writes:

> Matt Nordhoff wrote:
> > Well, you should use "xrange(10)" instead of "range(10)".
> 
>   CPython really is naive.  That sort of thing should be a
> compile-time optimization.

Or even a case of the 'xrange' behaviour making 'range' obsolete.

Which, as I pointed out earlier in the thread, it is in Python 3.0.

-- 
 \     "Yesterday I parked my car in a tow-away zone. When I came back |
  `\                   the entire area was missing."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From artyprog at gmail.com  Wed May 21 03:51:40 2008
From: artyprog at gmail.com (Salvatore DI DI0)
Date: Wed, 21 May 2008 09:51:40 +0200
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <4833d48d$0$898$ba4acef3@news.orange.fr>

> He meant it has been re-implemented in Javascript:

Indeed :-)

 There is a jython based NodeBox that runs on windows that can be found
> here:
>
> http://research.nodebox.net/index.php/NodeBoxDev
>
Thank you 




From notnorwegian at yahoo.se  Sun May 25 21:42:06 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:42:06 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
Message-ID: <a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>

Traceback (most recent call last):
  File "C:/Python25/Progs/WebCrawler/spider2.py", line 47, in <module>
    x = scrapeSites("http://www.yahoo.com")
  File "C:/Python25/Progs/WebCrawler/spider2.py", line 31, in
scrapeSites
    site = iterator.next()
RuntimeError: Set changed size during iteration


def joinSets(set1, set2):
    for i in set2:
        set1.add(i)
    return set1

def scrapeSites(startAddress):
    site = startAddress
    sites = set()
    iterator = iter(sites)
    pos = 0
    while pos < 10:#len(sites):
        newsites = scrapeSite(site)
        joinSets(sites, newsites)
        pos += 1
        site = iterator.next()
    return sites

def scrapeSite(address):
    toSet = set()
    site = urllib.urlopen(address)
    for row in site:
        obj = url.search(row)
        if obj != None:
            toSet.add(obj.group())
    return toSet


wtf? im not multithreading or anything so how can the size change here?


From dullrich at sprynet.com  Thu May 22 07:26:41 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Thu, 22 May 2008 06:26:41 -0500
Subject: "indexed properties"...
References: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
	<20080521124744.17546846@outerspace>
Message-ID: <7sla341agcpd1729k5pa0e0hern05qtv22@4ax.com>

On Wed, 21 May 2008 12:47:44 +0200, pataphor <pataphor at gmail.com>
wrote:

>On Tue, 20 May 2008 10:40:17 -0500
>"David C. Ullrich" <dullrich at sprynet.com> wrote:
>
>> > > Today's little joke: Long ago I would have solved
>> > > this by storing the data as a list of rows and _also_
>> > > a list of columns, updating each one any time the
>> > > other changed. Just goes to show you things
>> > > could always be worse...
>> > 
>> > Well have I ever ... I only thought about this last week and I
>> > actually thought it was a *good* idea. 
>> 
>> Sorry. If you really want to do this you could keep things
>> in sync automatically by writing the appropriate __setitem__
>> and resolving never to modify the data except through that...
>> 
>> def whatever.__setitem__(self, (row,col), value):
>>   self.rows[row][col] = value
>>   self.cols[col][row] = value
> 
>Using the trick of encapsulating the values inside single-element lists
>one can make a transposition of the matrix and get synchronicity for
>the little price of doubling the number of instances. Since the views
>share the data this is a lot less expensive than one would think. One
>can use the row view or the column view to alter data and the changes
>will automatically be visible in the other view, since the views update
>the same lists. 

Oh - that's different. This is not what I thought you had in mind
(it's not what I had in mind in the thing I called a joke.)

>There is a little notational gotcha, instead of writing
>row[0] = [1,2,3] one now must write row[0][:] = [1,2,3] or else
>synchronicity is lost.
>
>I found a nice ListMixin class at
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440656
>
>Using that I wrote the following proof of concept:
>
>class Storage(ListMixin):
>
>  def __init__(self, seq=[]):
>    self.L = [[x] for x in seq] 
>
>  def _constructor(self, iterable):
>    return Storage(iterable)

Probably I'm just being dense. Why does
_constructor exist? (Oh - looking at things
below, I imagine it's something to do with
ListMixin.)

>  def __len__(self):
>    return len(self.L)
>
>  def _get_element(self, i):
>    assert 0 <= i < len(self)
>    return self.L[i][0]
>
>  def _set_element(self, i, x):
>    assert 0 <= i < len(self)
>    self.L[i][0] = x
>
>  def _resize_region(self, start, end, new_size):
>    assert 0 <= start <= len(self)
>    assert 0 <= end   <= len(self)
>    assert start <= end
>    self.L[start:end] = [[None] for i in range(new_size)]
>
>def test():
>    n = 3
>    R = range(n)
>    it = iter(range(n*n))
>    MR = [Storage(it.next() for i in R) for i in R]
>    MC = [Storage() for i in R]
>    T = zip(*[x.L for x in MR])
>    for x,y in zip(MC,T):
>        x.L = y
>    print MR
>    print MC
>    MC[2][:] = 'abc'
>    print
>    print MR
>    print MC
>    
>if __name__=='__main__':
>    test()
>
>Output:
>
>[Storage([0, 1, 2]), Storage([3, 4, 5]), Storage([6, 7, 8])]
>[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage([2, 5, 8])]
>
>[Storage([0, 1, 'a']), Storage([3, 4, 'b']), Storage([6, 7, 'c'])]
>[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage(['a', 'b', 'c'])]
>
>P.

David C. Ullrich


From duncan.booth at invalid.invalid  Fri May 23 08:18:43 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 12:18:43 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
Message-ID: <Xns9AA78619210F2duncanbooth@127.0.0.1>

Erwin Moller 
<Since_humans_read_this_I_am_spammed_too_much at spamyourself.com> wrote:

> Why do you say it 'tastes less' then Python?
> I don't want to start a religious war, but am curious.
> Who knows, maybe  I'll dump PHP and start using Python after your 
> answer. ;-)

I may not be a good person to answer this since I don't know PHP: I don't 
have any religious objection to it, but I just never found it intuitive in 
the way I found Python fits my mindset.

On those rare occasions when I've helped someone who wanted advice I've 
found that my Python oriented viewpoint can be quite hard to translate to 
PHP. For example I'd suggest 'oh you just encode that as utf8' only to be 
told that there's no easy way to do that (have just Google'd it looks like 
there is now a way to do that but with a big red warning about it being 
EXPERIMENTAL and only use at your own risk).

(Looking at the example given for unicode_encode it appears to depend for 
its working on a global setting which isn't included in the example. I may 
have misunderstood the example but if I read that correctly its a good 
example of why PHP doesn't fit my brain.)

Anyway Google should find you plenty of articles comparing the languages. 
I'd say you use whichever feels right to you. I would also suggest you 
should try Python at least a bit (but since I don't intend to do the same 
for PHP you may not count my advice for much).

I found these pretty quickly:

http://python.about.com/od/gettingstarted/ss/whatispython_4.htm
http://wiki.w4py.org/python-vs-php.html


-- 
Duncan Booth http://kupuguy.blogspot.com


From notnorwegian at yahoo.se  Thu May 22 20:36:29 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 17:36:29 -0700 (PDT)
Subject: spider, why isnt it finding the url?
References: <08c10a3d-8cb8-433f-9831-cecf8fb7095b@y21g2000hsf.googlegroups.com>
Message-ID: <712878ec-de34-41ea-a938-a83920f8ef66@m45g2000hsb.googlegroups.com>

On 23 Maj, 02:02, notnorweg... at yahoo.se wrote:
> this program doesnt produce any output, however i know from testing
> that the url-regexp matches urls...
>
> import urllib
> import re
>
> site = urllib.urlopen("http://www.python.org")
>
> email = re.compile(r'[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}')
> url = re.compile("^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]{1}
> ([\w\-]+\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?
> ((\?\w+=\w+)?(&\w+=\w+)*)?")
>
> for row in site:
>     obj = url.search(row)
>     if obj != None:
>         print obj.group()

hmm ok it it printing it rows per rows. not what i expected.



From fariba42064 at yahoo.com  Thu May 29 14:45:01 2008
From: fariba42064 at yahoo.com (John)
Date: Thu, 29 May 2008 11:45:01 -0700 (PDT)
Subject: so funny...
Message-ID: <620361d6-5eb2-482a-8e28-4b2e9c906ece@26g2000hsk.googlegroups.com>

http://sitscape.com/topic/funny

Just keep hit the "Surprise->" button there for amazing fun.
Click on "channel" will show you other topics, lots of fun!



From tjreedy at udel.edu  Thu May  1 13:04:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 13:04:50 -0400
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
Message-ID: <fvct7f$9lp$1@ger.gmane.org>


"jmDesktop" <needin4mation at gmail.com> wrote in message 
news:c7424798-5b2c-4a72-8cfb-023ac067db71 at w7g2000hsa.googlegroups.com...
| This program:
|
| s = 'abcde'
| i = -1
| for i in range (-1, -len(s), -1):
|    print s[:i], i
|
| gives
|
| abcd -1
| abc -2
| ab -3
| a -4
|
| Why doesn't the first one have the e if -1 is the end of the list?  In
| Dive Into Python it said that -1 was the end of the list.  Thanks.

A sequence with n items has n+1 slice positions, numbered 0 to n: the 2 at 
beginning and end and n-1 between items.  Example
-a-b-c-
0 1 2 3
has 4 slice positions.
Hence the first item is seq[0:1] and last is seq[n-1:n]

In a sense, we 'ought' to index sequences with average of two successive 
slice positions, giving seq[1/2],,,seq[n-1/2].
But this is inconvenient, so we either round down (C, Python, etc) or up 
(Fortran), giving seq[0],,,,seq[n-1] or seq[1],,,seq[n].
Python allows n-1 and n-k to be abbreviated as -1 and -k.

-1 as an abbreviation of n-1 is only the end of the list for indexing.
n is the end for slicing.  It is abbreviated by omission.  Perhaps

for i in range(n+1): print i, 'abcde'[:5-i]

will make this all even clearer.

Terry Jan Reedy






From nrohan at gmail.com  Mon May 26 06:25:35 2008
From: nrohan at gmail.com (Rohan)
Date: Mon, 26 May 2008 03:25:35 -0700 (PDT)
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
	<69vg5qF34vemeU1@mid.uni-berlin.de>
Message-ID: <bf1929ee-647b-4046-b1ea-d693020503a2@w1g2000prd.googlegroups.com>

Thanks Diez for your suggestion.

>
> The only way I can think of is to regularly output something inside the CGI,
> and thus make it fail in the very moment the pipe is closed.
>

I also thought of this, but this looks little crude approach.
The problem seems very generic I was wondering if it could be handled
more
gracefully by some configuration in Apache or cgi script.

Apache process handling the request would close the connection with
client,
but it won't notify anything to spawned CGI process, so it keeps
running.




From kay.schluehr at gmx.net  Wed May 21 01:22:21 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 20 May 2008 22:22:21 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <24d11d17-118a-421f-83b0-327494446f9f@m3g2000hsc.googlegroups.com>

On 18 Mai, 00:32, Vicent Giner <vgi... at gmail.com> wrote:

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.

If Python doesn't run in production systems execution speed doesn't
matter much. What actually matters when *developing* non-trivial algos
is to partition the dataflow because it might take just long to reach
a certain execution point that is of current interest - and it has to
be reached repeatedly. For each method call one might want to work
with pre-computed data that were serialized in a former run. Given
Pythons flexibility this shall be easy and so it is! The combination
of object pickling/unpickling and using decorators makes this a snap.
Just look at the following simple decorator:

def dump_data(func):
    def call(*args, **kwd):
        res = func(*args, **kwd)
        fl = open("dump_data.pkl", "w")
        pickle.Pickler(fl, 0).dump(args[0])
        return res
    call.__name__ = func.__name__
    call.__doc__ = func.__doc__
    return call

and the corresponding loader:

def load_obj():
    f = open("dump_data.pkl")
    return pickle.Unpickler(f).load()

One might decorate an arbitrary object method foo() with dump_data and
resume the activity of the object after foo has been called in another
run by restoring the object with load_obj.

One can further improve this by serializing the test driver when it is
implemented as a generator. This is non-standard though and requires
some work [1] of my own or Stackless Python [2] alternatively.

What I intended to make clear is that Python has many goodies as a
toolbox besides having lots of bindings and being well readable ( the
usual suspects when it comes to advocation in threads like these ).

[1] http://www.fiber-space.de/generator_tools/doc/generator_tools.html
[2] http://www.stackless.com/




From christophberendes at gmail.com  Fri May  2 16:06:42 2008
From: christophberendes at gmail.com (chrisber)
Date: Fri, 2 May 2008 13:06:42 -0700 (PDT)
Subject: my module and unittest contend over commandline options...
References: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>
	<Xns9A9264BA67F0duncanbooth@127.0.0.1>
Message-ID: <3a38a998-e320-42e8-8186-72534815b8c5@f36g2000hsa.googlegroups.com>

On May 2, 4:54 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> chrisber<christophberen... at gmail.com> wrote:
> > ...it leaves me
> > wonderfing whether there would have been another clean way to allow
> > both my test code and unittest to have options without interfering
> > with one another.
>
> You can pass argv as a parameter to main(), so I think the best bet is
> simply to build up a new argv with the options that you want to pass
> through.

Aha! I scanned through my python 2.4 installataion and found this in
unittest
  def __init__(self, module='__main__', defaultTest=None,
                 argv=None, testRunner=None,
testLoader=defaultTestLoader):
        if type(module) == type(''):
            self.module = __import__(module)
            for part in module.split('.')[1:]:
                self.module = getattr(self.module, part)
        else:
            self.module = module
        if argv is None:
            argv = sys.argv

so I see what you mean. Thanks.



From yves at zioup.com  Fri May  9 01:15:21 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 09 May 2008 05:15:21 GMT
Subject: slicing lists
In-Reply-To: <9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
	<9cbadcb0-d452-419b-b04e-4142a055435b@p25g2000hsf.googlegroups.com>
Message-ID: <J5RUj.124719$Cj7.108485@pd7urf2no>

MRAB wrote:

> You should've read the thread entitled "Why don't generators execute
> until first yield?"! :-) Michael Torrie gave the URL
> http://www.dabeaz.com/generators/Generators.pdf. Your example can be
> rewritten as follows:
> 
> p = file('/etc/passwd') # No need for readlines() because file's
> iterator yields the lines.
> r = ( e.strip().split(':') for e in p ) # A generator expression
> instead of a list comprehension.
> s = [  e[0:1] + e[2:]   for e in r ]

Thanks, this is very elegant indeed, but because there are two list 
comprehension expressions (the one defining r and the one defining s), it 
means that the we're looping twice over the same list instead of once with 
the e[0,2:] hypotetical notation ; or am I missing something ?

Yves.
http://www.SollerS.ca


From bruno.desthuilliers at gmail.com  Wed May  7 18:46:54 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:46:54 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org> 
	<b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com> 
	<387351b2-cea5-4206-874d-6dfb94fda94b@8g2000hse.googlegroups.com>
Message-ID: <ec0154e6-2b2d-4220-ab65-285778cc21b7@x41g2000hsb.googlegroups.com>

On 7 mai, 23:20, John Roth <johnro... at gmail.com> wrote:
> On May 7, 3:03 pm, "bruno.desthuilli... at gmail.com"
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
>
> > > M?ta-MCI (MVP) wrote:
> > > > Hi!
>
> > > >> I don't often feel like using this word
>
> > > > Look at languages like OCAML or F #
>
> > > > @-salutations
>
> > > Well of course, we're all well aware of other languages that allow
> > > variables to be bound in the middle of an expression.  It's just that
> > > Python was purposely created without that (mis)feature because it's so
> > > unclear, and easy to abuse.
>
> > This is the same argument that has been used to justify the lack of MI
> > and operator overloading in Java.
>
> > Not that I would support having assignment as expressions in Python
> > (wouldn't fit the whole design IMHO), but this is still a somewhat
> > arbitrary design choice, not necessarily a GoodThing(tm) by itself -
> > well designed expression-based languages have their strength too.
>
> Clearly this leaves C and C++ out [grin].

Indeed.  Neither are expression-based languages anyway.



From josiah.carlson at gmail.com  Tue May 13 11:59:04 2008
From: josiah.carlson at gmail.com (Josiah Carlson)
Date: Tue, 13 May 2008 08:59:04 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
Message-ID: <8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>

Ludvig,

In a substantial way, I agree with you.  Calling initiate_send()
within push or push_with_producer is arguably a misfeature (which you
have argued).

In a pure world, the only writing that is done would be within the
handle_send() callbacks within the select loop.  Then again, in a
perfect world, calling readable() and writable() would have no strange
side affects (as your example below has), and all push*() calls would
be made within the handle_*() methods.

We do not live in a pure world, Python isn't pure (practicality beats
purity), and by attempting to send some data each time a .push*()
method is called, there are measurable increases in transfer rates.

In the particular case you are looking at (and complaining about ;) ),
if you want to bypass the initiate_send() call, you can dig into the
particular implementation of asynchat you are using (the internals may
change in 2.6 and 3.x versus 2.5 and previous), and append your output
to the outgoing queue.  You could even abstract out the push*() calls
for a non-auto-sending version (easy), write your own initiate_send()
method that checks the stack to verify that it's being called from
handle_send() (also easy), or any one of many other work-arounds.

Yes, it would be convenient to not have push*() actually send data
when called in some cases, but in others, the increase in data
transfer rates and/or reduction in latency is substantial.

 - Josiah

ludvig.ericson at gmail.com wrote:
> Hello,
>
> My question concerns asynchat in particular. With the following half-
> pseudo code in mind:
>
>     class Example(asynchat.async_chat):
>         def readable(self):
>             if foo:
>                 self.push_with_producer(ProducerA())
>             return asynchat.async_chat.readable(self)
>
> Now, asyncore will call the readable function just before a select(),
> and it is meant to determine whether or not to include that asyncore
> dispatcher in the select map for reading.
>
> The problem with this code is that it has the unexpected side-effect
> of _immediately_ trying to send, disregarding if the async_chat object
> is indeed writable or not.
>
> The asynchat.push_with_producer (and .push as well)
> call .initiate_send(), which in turn calls .send if there's data
> buffered. While this might seem logical, it isn't at all.
>
> Insinuate that when Example.readable is called, the socket has already
> been closed. There are two possible scenarios where it could be
> closed. a) The remote endpoint closed the connection, and b) the
> producer ProducerA somehow closed the connection (my case).
>
> Obviously, calling send on a socket that has been closed will result
> in an error - EBADF, "Bad file descriptor".
>
> So, my question is: Why does asynchat.push* call self.initiate_send?
> Nothing in the name "push" suggests that it'll transmit immediately,
> disregarding potential "closedness". Removing the two calls
> to .initiate_send() in the two push functions would still mean data is
> sent, but only when data can be sent - which is, IMO, what should be
> done.
>
> Thankful for insights,
> Ludvig.


From victor.herasme at gmail.com  Thu May 29 08:16:07 2008
From: victor.herasme at gmail.com (victor.herasme at gmail.com)
Date: Thu, 29 May 2008 05:16:07 -0700 (PDT)
Subject: Tuple of coordinates
Message-ID: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>

Hi,

i am using a software which uses python as its scripting language. I
want to generate a list of coordinates more or less this way:

for i in (beg, end, step):
     for j in (beg, end, step):
          for k in (beg, end, step):
.........

Coords =  ((i1,j1,k1), (i2,j2,k2), ...,(in,jn.kn))


Can anyone give me some advice on how to achieve this ? I got a little
idea, but still need to keep working til i get it. Thanks in advance,


Victor


From duncan.booth at invalid.invalid  Sun May 25 05:15:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 May 2008 09:15:45 GMT
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<Xns9AA6789C54B0Bduncanbooth@127.0.0.1>
	<mailman.1552.1211679461.12834.python-list@python.org>
Message-ID: <Xns9AA9687021A04duncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Thu, 22 May 2008 07:55:44 -0300, Duncan Booth
> <duncan.booth at invalid.invalid> escribi?: 
>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid>
>> wrote: 
>>
>>> Not to say that your concerns are pointless, and that things cannot
>>> be improved somehow, but this is not that trivial, and there may be
>>> ambuiguities in some not so rare cases.
>>
>> It might be worth considering an alternative approach here: a
>> formatted exception includes the relevant source lines (where
>> possible). 
> 
> Just to note that the standard cgitb module already does that, among
> other things. 
> 
Anywhere Python prints a traceback already does that. The 'alternative 
approach' I was suggesting was the part you snipped, i.e. extracting the 
enclosing class name from the source.


From __peter__ at web.de  Fri May 16 07:54:23 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 13:54:23 +0200
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
Message-ID: <g0jslc$paa$01$2@news.t-online.com>

Christian Heimes wrote:

> globalrev schrieb:
>> cust1 = customer.__init__('12',['1','435','2332'])
> 
> cust1 = customer('12',['1','435','2332'])

... and before that

from customer import customer

Peter


From ivan.illarionov at gmail.com  Fri May 23 03:53:09 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 07:53:09 +0000 (UTC)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
	<a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>
Message-ID: <g15t55$8qr$1@news.mtu.ru>

> The original .py will always be there but you know what, multiple python
> versions from different computers do access that one library at the same
> time.
> 
> Anyone know a possible solution ?

What about subversion or mercurial and separate copies of your library 
for each Python version?

-- Ivan


From python at bdurham.com  Thu May  1 09:31:11 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 01 May 2008 09:31:11 -0400
Subject: [ANN] Vellum 0.16: Lots Of Documentation and Watching
In-Reply-To: <ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
Message-ID: <1209648671.29817.1250878453@webmail.messagingengine.com>

Zed,

Read the first 2 chapters of your book and love it! Fun to read - I like
your writing style. I agreed with most of your premises/philosophies -
very refreshing.

I didn't find your language offensive but you might consider toning down
your review of the Awesome Window Manager :)

When do you plan on posting your next update?

Malcolm


From jarausch at igpm.rwth-aachen.de  Tue May 20 07:05:37 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 13:05:37 +0200
Subject: svg-chart 1.1 SVG Charting Library
In-Reply-To: <mailman.1312.1211124282.12834.python-announce-list@python.org>
References: <mailman.1312.1211124282.12834.python-announce-list@python.org>
Message-ID: <69fpk2F31akhjU1@mid.dfncis.de>

Jason R. Coombs wrote:
> I'm pleased to announce svg-chart 1.1, the first public release of a
> library for generating Scalable Vector Graphic (SVG) charts.
> 
>   http://sourceforge.net/projects/py-svg

This repository seems to be still empty?

Helmut.



-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From miller.paul.w at gmail.com  Mon May 26 16:16:01 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 13:16:01 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
Message-ID: <543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>

On May 26, 3:56?pm, notnorweg... at yahoo.se wrote:

> is the first example here a layer between machine and the second
> example?

My first example was intended to be C, or at least close to it.  The
second example is Python.  I consider the C snippet to be low-level,
while the corresponding Python is high-level.  There are simply fewer
extraneous details for me to worry about at the Python level, and
that's why I prefer to work with Python over C when practical.


From paul.hankin at gmail.com  Fri May  9 06:17:59 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 9 May 2008 03:17:59 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
Message-ID: <ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>

On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> and
> list2 = [0, 2, 4] # integer elements
>
> howto (I mean most simple recipe, of course) form list3 that contains
> elements from list1 with indexes from list2, i.e.

list3 = [list1[i] for i in list2]

--
Paul Hankin


From johnjsal at NOSPAMgmail.com  Tue May 20 13:19:28 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:19:28 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
Message-ID: <027e0b24$0$26906$c3e8da3@news.astraweb.com>

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:69g605F2v4102U2 at mid.uni-berlin.de...
> After being corrected about missing the construction of a None-containing
> list, one needs of course to think about the waste of resources, as a
> possible result-list is created in any case.

Yeah, I was already aware of the list of Nones, which is why I asked. Simply 
typing the list comprehension without an assignment just *looked* wrong, 
too. 




From aahz at pythoncraft.com  Sun May 18 00:43:55 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:43:55 -0700
Subject: Sanitised Newsgroup Feeds?
References: <fd18ede5-f697-4009-bb52-73e0c1d46e91@8g2000hse.googlegroups.com>
Message-ID: <g0oc6b$j7j$1@panix3.panix.com>

In article <fd18ede5-f697-4009-bb52-73e0c1d46e91 at 8g2000hse.googlegroups.com>,
Paddy  <paddy3118 at googlemail.com> wrote:
>
>Does anyone do a sanitised newsgroup feed? Something like what mail
>filters do for email?

My ISP (panix.com) is one of the remaining few that still honors netnews
cancels, which results in my seeing a cleaner feed than most people.
Stuff like Xah requires a killfile, though.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From arnodel at googlemail.com  Fri May  9 01:54:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 06:54:12 +0100
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <mailman.803.1210277723.12834.python-list@python.org>
Message-ID: <m2zlr03tvf.fsf@googlemail.com>

Eric Hanchrow <offby1 at blarg.net> writes:

> (This is with Python 2.5.2, on Ubuntu Hardy, if it matters.)
>
> This seems so basic that I'm surprised that I didn't find anything
> about it in the FAQ.  (Yes, I am fairly new to Python.)
>
> Here are three tiny files:
>
> ==== mut.py ====
>
>     import system
>     from system import thing
>
>     def doit():
>         print "       thing is", thing
>
>     def do_it_slightly_differently():
>         print "system.thing is", system.thing
>
> ==== system.py ====
>     thing = "I am the original thing!!"
>
> ==== test.py ====
>     import mut
>     mut.doit()
>     mut.do_it_slightly_differently()
>     import system
>
>     system.thing = "The new improved thing"
>     mut.doit()
>     mut.do_it_slightly_differently()
>
> When I run "python test.py", I see
>
>            thing is I am the original thing!!
>     system.thing is I am the original thing!!
>            thing is I am the original thing!!
>     system.thing is The new improved thing
>
> What surprises me is that the assignment to "system.thing" in test.py
> only seems to affect the use of "system.thing" in mut.py, and not
> affect the use of just plain "thing" in that same file.  I would have
> expected my assignment to have affected both, or perhaps neither.
>
> I have no idea why these two differ.  Can someone explain?
> -- 
> Rarely do we find men who willingly engage in hard, solid
> thinking.  There is an almost universal quest for easy answers
> and half-baked solutions.  Nothing pains some people more
> than having to think.
>         -- Martin Luther King, Jr.
>         from "Strength to Love," 1963.

    import system
    from system import thing

is the same as:

    import system
    thing = system.thing

Do you expect system.thing to be rebound when you rebind thing?

HTH

-- 
Arnaud



From byte8bits at gmail.com  Wed May  7 10:08:06 2008
From: byte8bits at gmail.com (brad)
Date: Wed, 07 May 2008 10:08:06 -0400
Subject: comparing dictionaries
Message-ID: <fvsd4o$r6f$1@solaris.cc.vt.edu>

I want to compare two dicts that should have identical info just in a 
different data structure. The first dict's contents look like this. It 
is authoritative... I know for sure it has the correct key value pairs:

{'001' : '01'}

The second dict's contents are like this with a tuple instead of a 
string for the key:

{('This is one', '001'): '01'}

Pseudo Code:
for key, value in first_dict.iteritems():
   # How do I do the following line?
   if key not in second_dict or if it is, but has has the wrong value, 
then let me know



From ccy56781 at gmail.com  Sat May 31 20:01:31 2008
From: ccy56781 at gmail.com (ccy56781 at gmail.com)
Date: Sat, 31 May 2008 17:01:31 -0700 (PDT)
Subject: Conjunction List
Message-ID: <2d1bbc53-0c98-4d6e-aedd-1bf4c966410b@v26g2000prm.googlegroups.com>

http://codepad.org/MV3k10AU

I want to write like next one.

def conjunction(number=a[1],name=b[1],size=c[1]):
  flag = a[0]==b[0]==c[0]
  if flag:
    for e in zip(number,name,size):
      print e

conjunction(a,b,c)

-----------------------------------------------------------------------------------------------------
function args receive sequence element:

def somefunc(name=elm1[1], size=elm2[1], color=elm3[1]):
  for e in zip(name, size, color):
    print e,

conjunction(a,b,c)
-----------------------------------------------------------------------------------------------------

not like two case:
-----------------------------------------------------------------------------------------------------

def somefunc(elm1, elm2, elm3):
  name = elm1[1]; size = elm1[1]; color = elm1[1] # best solution?
  for e in zip(name, size, color):
    print e,

conjunction(a,b,c)
-----------------------------------------------------------------------------------------------------

def somefunc(elm1, elm2, elm3, **attr):
  for e in zip(attr['name'], attr['size'], attr['color']):
    print e,

conjunction(a,b,c, name=a[1], size=b[1], color=c[1]) # many args...
-----------------------------------------------------------------------------------------------------

What's a good approach to get the conjunction nest-list-data?


From kyosohma at gmail.com  Thu May 22 14:34:55 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 11:34:55 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <4450b2d2-ae33-4b78-8fb6-fd2deb974182@79g2000hsk.googlegroups.com>

On May 21, 3:10?pm, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

TurboGears and Django are pretty cool Python web application
frameworks. I would recommend looking at them too.

Mike


From bruno.desthuilliers at gmail.com  Wed May  7 18:21:24 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:21:24 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<7xmyn1lr66.fsf@ruckus.brouhaha.com>
Message-ID: <af3af20d-127a-4962-af3a-a1c484af04ba@8g2000hse.googlegroups.com>

On 7 mai, 23:50, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
(snip)
> Someone else suggested the heapq module, which is a good approach
> though it might be considered a little bit high-tech.  If you
> want to use sorting (conceptually simpler), you could use the
> sorted function instead of the in-place sorting function:
>
>       # return the second element of a 2-tuple.  Note how we
>       # use tuple unpacking: this is really a function of one argument
>       # (the tuple) but we specify the arg as (a,b) so the tuple
>       # is automatically unpacked on entry to the function.
>       # this is a limited form of the "pattern matching" found in
>       # languages like ML.
>       def snd((a,b)): return b

operator.itemgetter does this already

>       return sorted(dic.iteritems, key=snd, reverse=True)[-3:]

you want to actually call iteritems here !-)

        return sorted(dic.iteritems(), key=operator.itemgetter(1),
reverse=True)

Thanks for reminding me the 'key' argument to sorted anyway - I too
often tend to forget it.


From aahz at pythoncraft.com  Sat May 10 13:39:23 2008
From: aahz at pythoncraft.com (Aahz)
Date: 10 May 2008 10:39:23 -0700
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<mailman.783.1210259880.12834.python-list@python.org>
Message-ID: <g04mkb$117$1@panix3.panix.com>

In article <mailman.783.1210259880.12834.python-list at python.org>,
Gary Herron  <gherron at islandtraining.com> wrote:
>   
>With Python, you can program with a smile on your face.

+1 QOTW

>(Truly, when I found Python, programming became fun again.)

"Again"?  Looking back over the years, after I learned Python I realized
that I never really had enjoyed programming before.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From drobinow at gmail.com  Sun May 25 20:37:02 2008
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Sun, 25 May 2008 17:37:02 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
Message-ID: <ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com>

On May 25, 8:26 pm, Prisoner at War <prisoner_at_... at yahoo.com> wrote:
> Hi, your friendly neighborhood n00b here, just wondering why on earth
> the Py3K folks want to mess with a simple thing like the "print"
> "command" (is that what it's called, a command?), turning it into
> "print()"...I mean, what's the point, exactly??  To look like a more
> "traditional" computer-language format?
>
> And what's with not supporting the so-called softspace "feature" of
> the current "print" command, where a space after a comma, like
>
> >>>print "A\n", "B"
>
> outputs
>
> >>>A\nB\n
>
> but with Py3K it will be
>
> >>>print("A\n", "B")
>
> returning
>
> >>>A\n B\n
>
> ????
>
> I was all excited to start learning the language, when suddenly I find
> out that a new version is slated for release late summer/early fall
> this year -- a new version which is not only not backwards-compatible
> with previous versions in many important ways, but even when it comes
> to a little thing like the "print" command!!
>
> What's up with that??

See  http://www.python.org/dev/peps/pep-3105/
That should answer all your questions.


From kamhung.soh at gmail.com  Tue May 27 20:32:20 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 28 May 2008 10:32:20 +1000
Subject: decorators when?
In-Reply-To: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
Message-ID: <g1i96n$e23$1@ger.gmane.org>

David C. Ullrich wrote:
> What version added decorators (using the
> @decorator syntax)?
> 
> (Is there a general way I could have found out the answer myself?)
> 
> Is there a somthing such that "from __future__ import something"
> will make decorators work in 2.5.2?
> 
> 
> David C. Ullrich

See:

http://www.python.org/doc/2.4/whatsnew/whatsnew24.html

Dunno of a general way view a list of features versus releases, other 
than reading the "What's New in Python x" documents.  Maybe some 
enterprising developer can compile this list?  Hint, hint.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From eglyph at gmail.com  Mon May 19 04:39:49 2008
From: eglyph at gmail.com (eglyph at gmail.com)
Date: Mon, 19 May 2008 01:39:49 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>

> but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here.

There is nothing special in executables produced by py2exe. I mean
that the debugging strategy is as always. A good start might be in
adding logging\tracing facilities both to script and the executable.
Comparing two trace files could give you some clue.


From martin at v.loewis.de  Wed May 28 16:03:14 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 28 May 2008 22:03:14 +0200
Subject: UTF-8 and stdin/stdout?
In-Reply-To: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <483DBA82.6090908@v.loewis.de>

> 	$ cat utf8_from_stdin.py
> 	import sys
> 	data = sys.stdin.read()
> 	print "length of data =", len(data)

sys.stdin is a byte stream in Python 2, not a character stream.
To make it a character stream, do

sys.stdin = codecs.getreader("utf-8")(sys.stdin)

HTH,
Martin


From bj_666 at gmx.net  Thu May 15 09:37:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 May 2008 13:37:05 GMT
Subject: no inputstream?
References: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>
Message-ID: <692sk0F3090hfU1@mid.uni-berlin.de>

On Thu, 15 May 2008 06:08:35 -0700, max wrote:

> i currently have locations of the mp3s in question as strings, which
> works for parsing local files, but gives me a "No such file or
> directory" error when it tries to process URLs.  it seems terribly
> inefficient to download each mp3 just to get at that small tag data,
> and i assume there's a way to do this with file() or open() or
> something, i just can't get it to work.

You can use `urllib2.urlopen()` to open URLs as files.  But if you deal
with ID3 V1 tags you'll have to download the file anyway because those are
in the last 128 bytes of an MP3 file.

Ciao,
	Marc 'BlackJack' Rintsch


From nkarkhan at gmail.com  Sun May 25 15:42:59 2008
From: nkarkhan at gmail.com (nkarkhan)
Date: Sun, 25 May 2008 12:42:59 -0700 (PDT)
Subject: Unicode lists and join (python 2.2.3)
Message-ID: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>

Hello,
I have a list of strings, some of the strings might be unicode. I am
trying to a .join operation on the list and the .join raises a unicode
exception. I am looking for ways to get around this.
I would like to get a unicode string out of the list with all string
elements seperated by '\n'

#!/usr/bin/env python
import sys
import string

try:
    x = [u"\xeeabc2:xyz", u"abc3:123"]
    u = "\xe7abc"
    x.append("%s:%s" % ("xfasfs", u))
    x.append(u"Hello:afddfdsfa")

    y = u'\n'.join(x)
    print("Unicode Call worked!")
except Exception, err:
    print("Exception raised %s" % err)



on a related note
Why does this work with no exceptions

    x=[]
    u = "\xe7abc"
    x.append("%s:%s" % ("xfasfs", u))

and this doesnt
    x=[]
    u = "\xe7abc"
    x.append("%s:%s" % (u"xfasfs", u))


Thanks,
Nitin.




From deets at nospam.web.de  Thu May  8 14:06:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 20:06:00 +0200
Subject: Python Syntax and misspelled variable and method name checker?
In-Reply-To: <mailman.799.1210269536.12834.python-list@python.org>
References: <mailman.799.1210269536.12834.python-list@python.org>
Message-ID: <68gtogF2sujboU1@mid.uni-berlin.de>

neerashish schrieb:
> 
> Is there a good Python Syntax and mis-spelled variable and method name
> checker available.
> 
> I have been programming in python for last 6 months and misspelled variables
> and method names have been bane of my python life. 
> 
> In complied languages, compiler checks for these mistakes. I come from Java
> , C++ background. 
> 
> I use komodo as editor on mac. I use python 2.4
> 
> Please suggest some good tool and utilities.

Try pylint, pychecker and the commercial version of pydev.

Diez


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 11:59:01 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 17:59:01 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <4829bac3$0$28389$426a74cc@news.free.fr>

wxPythoner at gmail.com a ?crit :
> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings. The result is
> unpredictable because of the way Python handles these objects
> internally.
> 
> How is with this issue in Python 3.0? Is it fixed? Does Python handle
> this things properly now?

This is not an issue and is already properly handled. Don't use identity 
test when you want an equality test, period.


From nc at iname.com  Thu May 22 01:28:32 2008
From: nc at iname.com (NC)
Date: Wed, 21 May 2008 22:28:32 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>

On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
> Yet, I want learn the guts of it instead of just booting up some
> wordwank or whatever.

Here's a simple computation to consider...  WordPress' codebase is
approximately a megabyte of PHP code and megabyte of JavaScript code.
Assuming that the average line of that code is 50 characters long, you
are looking at 20,000 lines of code in PHP and as many in JavaScript.
Based on the notion that the average developer out there writes 100
lines a day, either you're in for a two-year project or your product
is going to have seriously reduced functionality compared to something
that's been freely available for years.  What's your choice?

> Then I run across that blog, Coding Horror, and start reading
> articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html

You should read what some computer scientists write about SQL... :)

> Now what?

Nothing.  Everyone is entitled to their opinion.  You are free to form
your own.

> I've taken basic basic and basic C, but am barely literate
> in html.

Maybe that (and some JavaScript) is something to work on first before
delving into server-side programming?

> Well, that's my actual question, then.  Is php really so bad
> I'm just wasting my time?  Or is it really the quickest way
> to blog functionality?

The quickest way to blog functionality is an account on a blogging
service...  :)

> Would I be better served in the long run learning python, which
> claims to be easy as pie to learn/program (still looks hard to
> me).  I admit I'm no code geek.  But, I'm not completely brain
> dead, either, and I need something to keep my geezer brain
> sparking.  What say ye?

If the purpose is to keep the brain sparking, it doesn't matter what
you learn as long as you're enjoying the process.  You might as well
take up Japanese while you're at it...

Cheers,
NC


From Ken.Barclay at schwab.com  Sun May  4 23:31:45 2008
From: Ken.Barclay at schwab.com (Barclay, Ken)
Date: Sun, 4 May 2008 20:31:45 -0700
Subject: Script using generators produces different results when invoked as a
	CGI 
Message-ID: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>

Hello,
 
I attended David Beazley's awe-inspiring tutorial on the use of
generators in systems programming:
 
http://www.dabeaz.com/generators/
<BLOCKED::http://www.dabeaz.com/generators/> 
 
I used his approach to write a web tool that can display search results
from different log files. But the resulting script produced fewer
results when invoked as CGI than it did when run from the command line,
and I can't figure out why.
 
He showed how to 'pipeline' generators together in a form of declarative
programming. For example, put the following generators together to grep
lines out of a set of files:
 
# Generate a list of files
lognames = gen_find("*.bz2","/tmp/bz2_alldata/pa_new")
# Yield a sequence of file objects that have been suitably opened
logfiles = gen_open(lognames)
# Concatenate multiple generators into a single sequence
loglines = gen_cat(logfiles)
# Grep a sequence of lines that match a re pattern
searchlines = gen_grep(r'fried',loglines)
 
The functions are only a few lines each:

def gen_open(filenames):
    for name in filenames:
        if name.endswith(".bz2"):
            yield bz2.BZ2File(name)

def gen_cat(sources):
    for s in sources:
        for item in s:
            yield item
 
import re
def gen_grep(pat,lines):
    patc = re.compile(pat)
    for line in lines:
        if patc.search(line): yield line
 
Since they're generators, processing the data doesn't start until you
kick off the iteration on the final generator.
 
Problem: For small sets of files this works great. But when I had 19Meg
worth of log files in a test directory, the script would return the
correct number of matching lines (288) only when it was invoked directly
from the command line. When invoked from a CGI script, it returns 220
lines instead (written to the "tempfile", below.) I don't know where
that limit is coming from. If more logs are added to the test directory,
the result is always the same 220 lines.
 
I'm using Python 2.5.1 on Red Hat Linux 3.2.3-47. Below is the whole
script I was testing with. It's using hard-coded values in place of ones
I'll be getting from an HTML form (generated with HTMLgen) presented to
the user.
 
There are no exceptions or errors of any kind. Any pointers on what
might be happening here would be welcome!
 
Thanks
Ken
 
#!/usr/local/bin/python
 
import tempfile
from genfind import  gen_find
from genopen import  gen_open
from gencat  import  gen_cat
from gengrep import  gen_grep
 
tf = tempfile.mkstemp()
tmpfile = open(tf[1],'w')
 
lognames = gen_find("*.bz2","/tmp/bz2_alldata/pa_new")
logfiles = gen_open(lognames)
loglines = gen_cat(logfiles)
 
searchlines = gen_grep(r'fried',loglines)
for line in searchlines:
    print >> tmpfile, line,
tmpfile.close()

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From jschroed at gmail.com  Sat May 17 15:49:54 2008
From: jschroed at gmail.com (John Schroeder)
Date: Sat, 17 May 2008 12:49:54 -0700
Subject: waiting on an event blocks all signals
In-Reply-To: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
Message-ID: <4878ad7b0805171249r58428b47g4f6ebd8d0e3fcd0@mail.gmail.com>

^C only kills the main thread.  Use Control-Break to kill all threads.

On Sat, May 17, 2008 at 12:32 PM, alan <alangrow at gmail.com> wrote:

> This ignores CTRL-C on every platform I've tested:
>
> python -c "import threading; threading.Event().wait()"
> ^C^C^C^C
>
> It looks to me like all signals are masked before entering wait(). Can
> someone familiar with the internals explain and/or justify this
> behavior? Thanks,
>
> -Alan
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From p.f.moore at gmail.com  Thu May 29 07:22:45 2008
From: p.f.moore at gmail.com (Paul Moore)
Date: Thu, 29 May 2008 12:22:45 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
	<DE02840141C15249B2FAE5A61B40EA1C04299A@jc1wsmail6.global.knight.com>
Message-ID: <79990c6b0805290422g5b61f3c5l65034ee6e5798178@mail.gmail.com>

On 29/05/2008, Dahlstrom, Roger <rdahlstrom at directedge.com> wrote:
> I'd try looking at memcached (http://www.danga.com/memcached/apis.html).
>  No hacking or reimplementation of the interpreter would be necessary, and
> there's a Python api available.  I haven't used it for anything production related,
> but I have played with it a bit, and it's fast and stable.

Is memcached available for Windows, then? I've heard nice things about
it, but thought it was Unix-only.

Paul.


From Scott.Daniels at Acm.Org  Sun May 25 19:02:06 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 16:02:06 -0700
Subject: Getting a set of lambda functions
In-Reply-To: <mailman.1583.1211754595.12834.python-list@python.org>
References: <g1bjcj$u3m$1@aioe.org>	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
	<mailman.1583.1211754595.12834.python-list@python.org>
Message-ID: <W72dnaRymtZIcKTVnZ2dnUVZ_jydnZ2d@pdx.net>

Denis Kasak wrote:
...
>>>> spam = []
>>>> for i in range(10):
> ...   spam.append(lambda: i)
>>>> spam[0]()
> 9
>>>> spam[1]()
> 9
> 
> Manually creating the lambdas and appending them to a list works as
> expected, naturally; I don't see a good reason why it wouldn't work
> with a loop. Am I missing something?

Yes, you are missing something: binding time.  your anonymous function
returns the value of "i" in the enclosing scope _at_the_time_of_
_the function's_execution_.  If you follow your previous example with
'del i' and then execute any of your spam functions, you'll get an
"NameError: global name 'i' is not defined".

There are a couple of ways to slve your problem:
(1) use default args to do the binding at the function definition time.
     for i in range(10):
         spam.append(lambda arg=i: arg)
The lambda expression is normally spelled "lambda i=i: i)", but if you
don't know the idiom, I find the "i=i" part confuses people.

(2) Use something like functools.partial. if you are simply binding
     different args to the "same" function:

     import functools

     def thefunction(x):
         return x * 2

     spam = [functools.partial(thefunction, i) for i in range(10)]

--Scott David Daniels
Scott.Daniels at Acm.Org


From danb_83 at yahoo.com  Thu May  8 22:40:33 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 19:40:33 -0700 (PDT)
Subject: How can I add spaces where ever I have capital letters?
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com> 
	<mailman.829.1210298651.12834.python-list@python.org>
Message-ID: <55f521b4-c6eb-4668-b15e-01ba8d7bee47@k10g2000prm.googlegroups.com>

> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would like
> > to print out my CamelCase classes as titles.
>
> > I would like it to do this:
>
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
>
> > Anyone know any easy way to do this?  Thanks.

On May 8, 9:04?pm, "Eric Wertman" <ewert... at gmail.com> wrote:
> Something like this. ?I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
> ? ? ? ? return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr = ?re.sub('[A-Z]',addspace,strng)
>
> print newstr.strip()

Yes, there are other ways to do it.  If, for example, you like one-
liners but not regexps:

def add_spaces(text):
    return text[:1] + ''.join((' ' + char if char.isupper() else char)
for char in text[1:])


From deets at nospam.web.de  Tue May 13 16:18:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 22:18:25 +0200
Subject: Why can't I import this?
In-Reply-To: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
Message-ID: <68ubcuF2ur7lkU2@mid.uni-berlin.de>

John Henry schrieb:
> Hi list,
> 
> I can't understand this.  The following import statement works fine:
> 
>     from PythonCard.templates.dialogs import runOptionsDialog
> 
> but this one fails:
> 
>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
> 
> I've checked and rechecked to make sure that the spellings are proper
> and that the tools, the codeEditor directory, and codeEditor.py, and
> the class CodeEditor all exists and yet idle keep complaining that it
> can't import from PythonCard.tools.

How do these complaints *look* - we can't read your mind nor your 
screen, as you might imagine....

> What's going on?  (Running Python2.5 under WinXP).

What do you think is more probable - pythons import-mechanism, the 
foundation of nearly all libraries, is broken - or you make a mistake?

Diez


From Scott.Daniels at Acm.Org  Tue May 20 21:08:00 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 20 May 2008 18:08:00 -0700
Subject: Removing Space and "-" from a string
In-Reply-To: <mailman.1387.1211301238.12834.python-list@python.org>
References: <mailman.1387.1211301238.12834.python-list@python.org>
Message-ID: <tt6dnfd1Ca197q7VnZ2dnUVZ_hadnZ2d@pdx.net>

python at bdurham.com wrote:
> Shakir,
> 
>> I have thousands of records in MS Access database table, which records I
>> am fetching using python script. [A] columns has strings like '8 58-2155-58'
>> Desired output: '858215558'
>>>> input = '8 58-2155-58'
>>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>>> output
> '858215558'

If you are planning to do a lot of strings:

     identity_trans = ''.join(chr(x) for x in range(256))

Then you can do simply:
     input = '8 58-2155-58'
     output = input.translate(identity_trans, ' -')

--Scott David Daniels
Scott.Daniels at Acm.Org


From jcd at sdf.lonestar.org  Thu May  8 07:02:52 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 08 May 2008 07:02:52 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <200805080912.29438.onsen-neko@gmx.net>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805072119.30744.onsen-neko@gmx.net>
	<1210189736.4595.2.camel@aalcdl07.lib.unc.edu>
	<200805080912.29438.onsen-neko@gmx.net>
Message-ID: <1210244572.6529.5.camel@jcd-desktop>

On Thu, 2008-05-08 at 09:12 +0200, Daniel Marcel Eichler wrote:
> Am Mittwoch 07 Mai 2008 21:48:56 schrieben Sie:
> 
> > > That's the point. Interfaces garantee that a duck is a duck, an not
> > > only a chicken that quack.
> > Which, in spite of your rhetorical flourish, is the exact opposite of
> > duck typing.  Duck typing means that if you're looking for quacking
> > behavior, and you find a quacking chicken, it's close enough.
> 
> I didn't said that interfaces are a kind of duck-typing. In fact it was 
> the exact opposite.
> 
> > Sometimes you need that kind of rigor, and you can get it as easily
> > as
> 
> And sometimes you need more. So what?
> 

More rigor than Zope's interfaces offer?  That's new information to me.
Perhaps you should stop being argumentative for a moment, and explain
exactly what it is you're looking for and why Zope interfaces don't fit
the bill.





From sajmikins at gmail.com  Wed May 21 01:14:37 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Tue, 20 May 2008 22:14:37 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
Message-ID: <490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>

On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
>
>
> > You don't need all those conditionals. A set differs from a list
> > precisely in the fact that each element is unique. And since the
> > function is expecting "s" to be an iterable object, it can be
> > constructed even without a for loop:
>
> > def compress(s):
> >     return list(set(s))
>
> > That does the trick.
>
> Only if order does not need to be maintained.  list(set(s)) will not
> necessarily keep the unique characters in the order they are seen.
> We'll have to check with the OP to see if this is important (I just
> assumed that it was because of the use of list comps).
>
> -- Paul


If order is important, you can use sorted() instead of list() like so:

def compress(s):
    new = sorted(set(s), key=s.index)
    return return ''.join(new)

~Simon


From bignose+hates-spam at benfinney.id.au  Fri May  2 10:37:45 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 May 2008 00:37:45 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
Message-ID: <87fxt0zs92.fsf@benfinney.id.au>

Thorsten Kampe <thorsten at thorstenkampe.de> writes:

> * Ben Finney (Fri, 02 May 2008 23:30:01 +1000)
> > The OP was asking why people prefer on over the other. My answer
> > is that I prefer specifying "give me the default OS Python"
> > because anything not installed by the OS is to non-standardised
> > for me to worry about.
> > 
> > Others may prefer something different, but then they get to wear
> > whatever problems occur as a result of that choice. I continue to
> > be bemused by that preference, and nothing that I've seen so far
> > in this thread illuminates the issue more.
> 
> You're missing the point. Apart from the really dubious terms you
> use ("OS installable package"), using env in the first line has
> exactly the effect to use the default path of Python (which is the
> first entry in your path)

No, because it's quite common for the PATH variable to have
'/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.

If the system has a sysadmin-installed '/usr/local/bin/python'
installed as well as the OS-installed '/usr/bin/python', then the two
shebang options the OP raised will behave differently on such a
system. This seems to be quite the point of the discussion.

-- 
 \          "Time's fun when you're having flies."  -- Kermit the Frog |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From castironpi at gmail.com  Sat May 17 05:57:08 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 02:57:08 -0700 (PDT)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
Message-ID: <143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>

Full day later, I think it, to emphasize state, would prioritize
context.  The reason for the huge ramble was, believe it or not,
namespace conflict... as though any other states around here might
nose in.  And thanks to 'inhahe' for coming back with the
question.  ...Which would explain next move to 'prioritize context'.
Context is a high priority for people.

I'm proposing to start on one on a computer.  The first things a
computer 'knows' are the boot, keyboard, & mouse.  Yet on another
scale, the first things it knows are BIOS, file system, and OS.  On
still another, the only thing it knows are interruptions.  Knowledge
is important to context.  (The scales are ram on disk on, ram on disk
off, and ram off, which may tell of the currency they and their power
are bought with.  Thence, we should be getting different values for
lengths of time.)

(Furthermore, we're all on different longitudes -and- latitudes.)

Context comes from motion, perception, and composite perception
(reperception e.a.o. memory).  There is some reason to believe that
motion and sight are different senses, perhaps so with stationary
sound (gatcha) and mobile sound too.  Do you go deaf of a tone after
prolonged duration?  That makes computers valuable commodities*: they
have a symbolic interface, which no other unlive objects have.  They
have both mouse and keyboard.

*I'm sure there is a precision to wants: what magnitude of what types
of action a person wants from a day and for a time-- what energy
states they go to and from (note phone on come to and come from.)

Therefore, context should originate in mouse and keyboard.

Humans have symbolic know-how: knowledge of how to convey intent
digitally, though it may be there is no interpolation of 'intent per
mouse-or-key', even though people are prone to empathize with faces.
However, if you start with a 'me' and a 'no', you can get pretty
logical.

Intent per mouse-and-key isn't necessarily scalar, three-dimensional,
or rationally dimensional (?), though they do have magnitudes per mass
and volume.  The contingent of 'rationally dimensional' is having or
beknowing/benouncing an orthonormal basis.  Incidentally,
'''orthography of a language specifies the correct way of using a
specific writing system to write the language. .. Orthography is
derived from Greek ????? orth?s ("correct") and ??????? gr?phein ("to
write").''' - wikipedia.

Further incidentally, context and state may have more important in
common than priority and price: privacy and safety are involved ex
hypothesi.  Incidentally = ...

It is not clear that the first (cheapest best) human-computer language
is a computer language, though if two were orthonormal in comparison
to life, Python's fine.  Not my first.

In privacy concerns, it is not clear that duals aren't primitives to
humans.  What's a brain primitive?  Lol: what is a primitive brain?




On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
> I'm not an expert in this but what does it mean to emphasize state? ?It
> seems the opposite of that would be a) functional programming, and b)
> passing parameters instead of using global or relatively local variables.
> And maybe c) coroutines (generators as implemented in Python), although
> perhaps coroutines could be said to emphasize state inasmuch as they go out
> of their way to capture, objectify and reuse it (Stackless' microthreads,
> even moreso). ?And Python seems to be well-noted for implementing some
> functional programming methodology, and as for passing parameters it's just
> as object-oriented as the rest of them.
>
> But as I said, I'm not an expert, so let me know if I've gone astray..
>
>
>
> > I have a proposition to ask you all: Python emphasizes state. ?Is it
> > true?- Hide quoted text -
>
> - Show quoted text -



From yves at zioup.com  Wed May  7 23:34:53 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 08 May 2008 03:34:53 GMT
Subject: slicing lists
In-Reply-To: <mailman.731.1210209219.12834.python-list@python.org>
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
Message-ID: <xxuUj.250118$pM4.15725@pd7urf1no>

Miles wrote:
> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>  >  > Is there a way to do:
>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>  >  > x[0,2:6]
>  >  >
>  >  > That would return:
>  >  > [0, 3, 4, 5, 6]

Arg... Yes, this is a typo, I meant:
[1, 3, 4, 5, 6]

>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list slicing:
> 
>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
>  return @x[0, 2..6]; // returns (1, 3, 4, 5, 6)

Yes, exactly.

> 
>  This isn't incredibly efficient, but it does what you want (I think):
> 
>  from itertools import chain
> 
>  class multisliceable(list):
>   def __getitem__(self, slices):
>     if isinstance(slices, (slice, int, long)):
>       return list.__getitem__(self, slices)
>     else:
>       return list(chain(*[list.__getitem__(self, s) if isinstance(s, slice)
>                           else [list.__getitem__(self, s)] for s in slices]))
> 
>  p = open('/etc/passwd')
>  q = [multisliceable(e.strip().split(':'))[0,2:] for e in p]

So would it be a worthy addition to python, to add it right in the core of 
the language, and hopefully in an efficient manner ?

That would certainly help some type of list comprehensions, making them more 
readable, and hopefully more readable (running split once instead of twice, 
or how many number of time you need it). The passwd example is just one 
example I ran into, but I can see running in this problem a lot with more 
complex cases. Right now I solve the passwd pb with:

p = file('/etc/passwd').readlines()
r = [ e.strip().split(':') for e in p ]
s = [  e[0:1] + e[2:]   for e in r ]


Or:

p = file('/etc/passwd').readlines()
s = [  e.strip().split(':')[0:1] + e.strip().split(':')[2:]   for e in p ]

In the first case we're looping twice (two list comprehension), in the 
second case we're running the split twice on every element of p.


Yves.
http://www.SollerS.ca





From marco at sferacarta.com  Tue May 13 05:43:13 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 11:43:13 +0200
Subject: Some comparison operators gone in Python 3.0?
In-Reply-To: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
Message-ID: <SodWj.41692$o06.22997@tornado.fastwebnet.it>

wxPythoner at gmail.com wrote:

> Is that true that this comparison operators are gone in Python 3.0:
> 
> <    (is less than)
>>    (is greater than)
> <= (is less than or equals)
>> = (is greater than or equals)
> 
> Is it true?

Nope.


From ethan.mallove at sun.com  Tue May 20 11:27:43 2008
From: ethan.mallove at sun.com (emallove)
Date: Tue, 20 May 2008 08:27:43 -0700 (PDT)
Subject: Python in non-standard location erring with "No module named _sha256"
Message-ID: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>

I'm running into the below "No modules named _sha256" issue, with a
python installed in a non-standard location.

$ python
Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
[GCC 3.3.3 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import md5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
    from hashlib import md5
  File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
<module>
    sha224 = __get_builtin_constructor('sha224')
  File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
__get_builtin_constructor
    import _sha256
ImportError: No module named _sha256

Googling around, this seems to be related to OpenSSL being in a non-
standard location? I've edited the Setup file to set $(SSL) to the non-
standard location. Now Python compiles fine, but I still get the above
error.

Any help would be much appreciated.

Thanks,
Ethan


From waldemar.osuch at gmail.com  Sat May  3 14:51:58 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Sat, 03 May 2008 18:51:58 GMT
Subject: Python and SOAP status
In-Reply-To: <bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
	<L9idnZbWDac084bVnZ2dnUVZ_tidnZ2d@comcast.com>
	<bd2be0ea-b444-480a-92d2-c8b8f4931b51@k13g2000hse.googlegroups.com>
Message-ID: <iv2Tj.112482$Cj7.79520@pd7urf2no>

Jeff wrote:
> Twisted has SOAP support.
yes but it is based on no longer actively maintained SOAPpy.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 05:59:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 11:59:54 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <0DFYj.28609$ie5.21801@newsfe05.ams2>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>
	<0DFYj.28609$ie5.21801@newsfe05.ams2>
Message-ID: <4833f28d$0$3737$426a74cc@news.free.fr>

Roel Schroeven a ?crit :
> Wow this resulted in far more reactions than I had expected ...
> 
> bruno.desthuilliers at gmail.com schreef:
>> On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
>> wrote:
>>> Bruno Desthuilliers schreef:
>>>
>>>> 1/ being interpreted or compiled (for whatever definition of these
>>>> terms) is not a property of a language, but a property of an
>>>> implementation of a language.
>>>> 2/ actually, all known Python implementations compile to byte-code.
>>> You keep saying that, and in theory you're right.
>>
>> "In theory" ??? Heck, both points above are mere facts. Well, I may
>> accept that the 2nd one is a bit overgeneralized, since IIRC there's
>> an experimental Python to javascript "compiler" in Pypy, but...
>>
>>>  But I'm still inclined to disagree with it,  since the practical 
>>> reality is different.
>>
>> Do you mean that how source code written in a language (that is : a
>> grammar  + a syntax) finally become a set of instructions executed by
>> a CPU depends on the language (I repeat : a grammer + a syntax), and
>> not on a piece of software turning the source code into something that
>> can actually be executed by the CPU ?
> 
> No, that's not what I said; what I said is that some languages where 
> designed with in the back of the head the idea that they were going to 
> be compiled to native code, others to be interpreted, and others to be 
> compiled to byte code.

I'd put it more simply : some languages were designed with low-level 
access and raw performances in mind, and some were'nt. Roel, I'm totally 
aware of these issues - on which you're of course right -, but that 
doesn't change the fact that a language and it's implementation *are* 
distinct things.

(snip)

> So yes, the transformation method from source code to something that the 
> CPU understands depends on your tools.

And you can have different tools using different solutions for a same 
language.

> But if you want to get work done, 
> the most common method by far for C is to use a toolchain that compiles 
> to native code and for Python a byte code compiler + virtual machine. 
> With possibly a JIT compiler, that's true.


>>> Python is
>>> indeed compiled to byte code, but if you compare that byte code with
>>> assembly code you'll see that there's a whole world of difference
>>> between the two,
>>
>> Obviously, yes - at least for all assembly language I've seen so far.
>> But whoever said otherwise ?
> 
> Whenever someone says that Python is interpreted, you respond saying 
> that that's not true, since it's compiled to byte code.

Whenever someone says that Python is interpreted, I respond saying that 
being interpeted or compiled is not a feature of a language, and that 
CPython compiles to byte-code.

> Correct of 
> course,

And that's the point : being correct.

> but somehow it appears to me that you imply

I don't imply anything - except eventually that the person I'm 
correcting should know better.

> that that makes 
> Python closer to a C-like language than to an interpreted language,

Strange enough, no one calls Java or C# 'interpreted languages', while 
they (or, to be more exact, their reference implementations) both  use 
the same byte-code/VM scheme[1]. You know, the commonly accepted 
definition of "byte-code" is "something that is going to be passed to a 
virtual machine", not "native binary executable code", so I don't think 
this could be really misleading.

Now what you don't seem to get is the difference between pure 
interpretation - where each and every statement is parsed and 
interpreted again and again - and intermediate byte-code compilation. 
Believe me, *this* can make a huge difference wrt/ performances.

Also and FWIW, there are quite a lot of "C-like languages" that are - in 
their only or reference implementation - interpreted or compiled to 
byte-code. For a definition of "C-like" being "close to the C language's 
syntax and grammar" !-)

[1] Oh, and before some nut-case jump in : no, this doesn't imply that 
the CPython VM is 'equivalent' to Sun's Java VM or MS CLI/.NET VM.

> and 
> that's not correct (IMO). If that's just a misinterpretation by me, I 
> apologize.
> 
>>>  largely because of the dynamical nature of Python. Fact
>>> is that Python was designed from the start to run on a virtual machine,
>>> not on the native hardware.
>>
>> Nope. The facts are that
>> 1/ Python (the language) has *not* been designed with ease of
>> implementation of an optimizing native-code compiler in mind,  and
>> 2/ CPython (the first and reference implementation) has been designed
>> to use a byte-code + VM scheme
> 
> Isn't that more or less the same as what I said?

Can't you tell the difference ???

> Maybe I don't make enough distinction between Python the language and 
> CPython the implementation,  but Python development does happen on the
> CPython implementation (Python 3.0 alpha releases are CPython releases, 
> for example).
> 
>>
>>> C OTOH was designed to be compiled to assembly code (or directly to
>>> machine code)
>>
>> Note quite. C has been designed to make it as easy as possible to
>> write either a C to assembly or C to native binary code compiler.
> 
> I find it hard to believe that during the development of C Dennis 
> Ritchie was considering any other mode of operation than compilation to 
> assembly or machine code. I might be wrong of course.

I'm not talking about "development" (which implies implementation), but 
about the design of the *language*. Roel, can you define "language" ?

>>> and as a result there are no (or virtually) no
>>> implementations that interpret C or compile it to bytecode.
>>
>> There's at least one (possibly incomplete) C interpreter.
> 
> I'd like to call that the exception that confirms the rule.

Which rule ?

Oh, and yes - as a couple persons pointed out, there are actually more 
than "one (possibly incomplete) C interpreter" - there are  also the 
llvm byte-code compiler+VM and the MS CLI C/C++ compiler.

>> There's a very naive belief we saw every here and then here, which is
>> that "Python would be faster if it was compiled to native code". The
>> point is that, given Python's (as a language) extrem dynamism,
>> compiling it to native code wouldn't buy you much in terms of raw
>> performances. The problem is not with writing a native-code
>> compiler[1}, but with writing an *optimising* native-code compiler.
> 
> I admit I'm guilty of that belief. I know it's true what you say, but I 
>  do have the more-or-less unconscious reflex 'compiled to native code == 
> fast'.

So make a simple test : write a very Q&D cat-like program in Python, C 
and Perl, and benchmark the three implementations. The results might 
surprise you.


>> I'm just getting fed up with
>> this "Python is an interpreted and therefore slow language" non-
>> sense.  Python is a language, and as such is neither slow nor fast nor
>> interpreted nor compiled nor <insert any implementation related stuff
>> here>. And while CPython is not blazingly fast for computation-heavy
>> stuff, it's not because it is "interpreted" - which it is not for a
>> strict definition of "interpreted", but anyway...  - but because
>> *optimizing* execution of an highly dynamic language is nothing,
>> well,  err, trivial.
> 
> So you are saying that CPython is relatively slow because Python is a 
> highly dynamic language.

And therefore difficult to optimize.

> I know that CPython is not Python and Python is 
> not CPython, but there is a very strong association between the two

Indeed. CPython is the reference implementation of Python. Like GCC is 
the reference implementation of C on linux platforms. etc...

> and 
> therefore I think it's not really that much wrong to simplify that to 
> 'Python is slow because it is a highly dynamic language'

It is definitively wrong. How could a *language* be 'slow' or 'fast' ?

> (until proven 
> wrong by PyPy or another fast implementation'.

You know, Common Lisp is also an highly dynamic language, and there are 
now some optimizing native-code Common Lisp compilers that generate very 
efficient binary code. It only tooks about 30 years and way more 
ressources than CPython ever had to get there...



From wizzardx at gmail.com  Mon May 26 06:52:35 2008
From: wizzardx at gmail.com (David)
Date: Mon, 26 May 2008 12:52:35 +0200
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>
Message-ID: <18c1e6480805260352y6e3e7829ja0f81ece27133e6c@mail.gmail.com>

Python is getting some 'unclean' features like function annotations[1]
and abstract base classes[2], so it is possible that it will get more
explicit support for private class attributes at some point, if there
is enough demand for it.

[1]http://www.python.org/dev/peps/pep-3107/
[2]http://www.python.org/dev/peps/pep-3119/

David.


From mnikhil at gmail.com  Tue May 20 14:01:15 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:31:15 +0530
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
	<g0v2vs$38b$01$1@news.t-online.com>
Message-ID: <483311EB.1040307@gmail.com>

Peter Otten wrote:
> Nikhil wrote:
> 
>> I have recently written a small module. When I import the module, I
>> always get the error
>>
>>
>> only when I do
>>
>>  >>> from local.my.module import *
>>
>> --
>> Traceback (most recent call last):
>>    File "<stdin>", line 1, in <module>
>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>> ---
>>
>>
>> but when I do the below, I do not get any error.
>>
>> --
>>  >> import local.my.module
>>  >>
>> --
>>
>> Any ideas on what could be wrong?
> 
> Are you abusing the __all__ attribute?
> 
> $ cat tmp.py
> __all__ = ['/xyz/py/file']
> 
> $ python -c "from tmp import *"
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> 
> Peter

Hi Peter,

Yes, I am. Is there any reason not to?

basically, since this is implemented in the module, I have to export it 
since the caller to the function in the module is responsible for 
ensuring he has enough proper permissions to read the file.

Thanks,
Nikhil


From ivan.illarionov at gmail.com  Sat May 17 06:35:14 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 17 May 2008 10:35:14 +0000 (UTC)
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <g0mcd2$2qk0$2@news.mtu.ru>

On Sat, 17 May 2008 02:57:08 -0700, castironpi wrote:

> Full day later, I think it, to emphasize state, would prioritize
> context.  The reason for the huge ramble was, believe it or not,
> namespace conflict... as though any other states around here might nose
> in.  And thanks to 'inhahe' for coming back with the question.  ...Which
> would explain next move to 'prioritize context'. Context is a high
> priority for people.
> 
> I'm proposing to start on one on a computer.  The first things a
> computer 'knows' are the boot, keyboard, & mouse.  Yet on another scale,
> the first things it knows are BIOS, file system, and OS.  On still
> another, the only thing it knows are interruptions.  Knowledge is
> important to context.  (The scales are ram on disk on, ram on disk off,
> and ram off, which may tell of the currency they and their power are
> bought with.  Thence, we should be getting different values for lengths
> of time.)
> 
> (Furthermore, we're all on different longitudes -and- latitudes.)
> 
> Context comes from motion, perception, and composite perception
> (reperception e.a.o. memory).  There is some reason to believe that
> motion and sight are different senses, perhaps so with stationary sound
> (gatcha) and mobile sound too.  Do you go deaf of a tone after prolonged
> duration?  That makes computers valuable commodities*: they have a
> symbolic interface, which no other unlive objects have.  They have both
> mouse and keyboard.
> 
> *I'm sure there is a precision to wants: what magnitude of what types of
> action a person wants from a day and for a time-- what energy states
> they go to and from (note phone on come to and come from.)
> 
> Therefore, context should originate in mouse and keyboard.
> 
> Humans have symbolic know-how: knowledge of how to convey intent
> digitally, though it may be there is no interpolation of 'intent per
> mouse-or-key', even though people are prone to empathize with faces.
> However, if you start with a 'me' and a 'no', you can get pretty
> logical.
> 
> Intent per mouse-and-key isn't necessarily scalar, three-dimensional, or
> rationally dimensional (?), though they do have magnitudes per mass and
> volume.  The contingent of 'rationally dimensional' is having or
> beknowing/benouncing an orthonormal basis.  Incidentally, '''orthography
> of a language specifies the correct way of using a specific writing
> system to write the language. .. Orthography is derived from Greek ?????
> orth?s ("correct") and ??????? gr?phein ("to write").''' - wikipedia.
> 
> Further incidentally, context and state may have more important in
> common than priority and price: privacy and safety are involved ex
> hypothesi.  Incidentally = ...
> 
> It is not clear that the first (cheapest best) human-computer language
> is a computer language, though if two were orthonormal in comparison to
> life, Python's fine.  Not my first.
> 
> In privacy concerns, it is not clear that duals aren't primitives to
> humans.  What's a brain primitive?  Lol: what is a primitive brain?
> 
> 
> 
> 
> On May 16, 10:58?am, "inhahe" <inh... at gmail.com> wrote:
>> I'm not an expert in this but what does it mean to emphasize state? ?It
>> seems the opposite of that would be a) functional programming, and b)
>> passing parameters instead of using global or relatively local
>> variables. And maybe c) coroutines (generators as implemented in
>> Python), although perhaps coroutines could be said to emphasize state
>> inasmuch as they go out of their way to capture, objectify and reuse it
>> (Stackless' microthreads, even moreso). ?And Python seems to be
>> well-noted for implementing some functional programming methodology,
>> and as for passing parameters it's just as object-oriented as the rest
>> of them.
>>
>> But as I said, I'm not an expert, so let me know if I've gone astray..
>>
>>
>>
>> > I have a proposition to ask you all: Python emphasizes state. ?Is it
>> > true?- Hide quoted text -
>>
>> - Show quoted text -

Castironpi,

I love you! You remind me of all the kittens and puuppies I had when I 
was a child.

I #define this. Hope your database could give us something funny again.

-- Ivan


From skanemupp at yahoo.se  Thu May 15 12:12:07 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:12:07 -0700 (PDT)
Subject: file open/read/name etc, not working
Message-ID: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>

import os

print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
d.readline()

returns true in the shell but prints no text even though the document
contains text.

d.name returns nothing, d.name() raises an error.


From google at mrabarnett.plus.com  Fri May 16 21:21:33 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 16 May 2008 18:21:33 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <8e840aa6-71c7-4849-b503-f9289944541d@c58g2000hsc.googlegroups.com>

On May 16, 10:22 pm, "Dan Upton" <up... at virginia.edu> wrote:
> This might be more information than necessary, but it's the best way I
> can think of to describe the question without being too vague.
>
> The task:
>
> I have a list of processes (well, strings to execute said processes)
> and I want to, roughly, keep some number N running at a time.  If one
> terminates, I want to start the next one in the list, or otherwise,
> just wait.
>
> The attempted solution:
>
> Using subprocess, I Popen the next executable in the list, and store
> it in a dictionary, with keyed on the pid:
> (outside the loop)
> procs_dict={}
>
> (inside a while loop)
> process = Popen(benchmark_exstring[num_started], shell=true)
> procs_dict[process.pid]=process
>
> Then I sleep for a while, then loop through the dictionary to see
> what's terminated.  For each one that has terminated, I decrement a
> counter so I know how many to start next time, and then try to remove
> the record from the dictionary (since there's no reason to keep
> polling it since I know it's terminated).  Roughly:
>
> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
>
> The problem:
>
> RuntimeError: dictionary changed size during iteration
>
> So, the question is: is there a way around this?  I know that I can
> just /not/ delete from the dictionary and keep polling each time
> around, but that seems sloppy and like it could keep lots of memory
> around that I don't need, since presumably the dictionary holding a
> reference to the Popen object means the garbage collector could never
> reclaim it.  Is the only reasonable solution to do something like
> append all of those pids to a list, and then after I've iterated over
> the dictionary, iterate over the list of pids to delete?
>
> (Also, from the implementation side, is there a reason the dictionary
> iterator can't deal with that?  If I was deleting from in front of the
> iterator, maybe, but since I'm deleting from behind it...)
>
Why do you need a counter? len(procs_dict) will tell you how many are
in the dictionary.

You can rebuild the dictionary, excluding those that are no longer
active, with:

procs_dict = dict((id, process) for id, process in
procs_dict.iteritems() if process.poll() != None)

and then start N - len(procs_dict) new processes.


From mcknight0219 at gmail.com  Tue May 13 03:01:58 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Tue, 13 May 2008 00:01:58 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<g0b19h$2ne$1@news.mtu.ru>
Message-ID: <418dfa26-ccf1-476d-b7db-492f57cb0679@u36g2000prf.googlegroups.com>

On May 13, 11:18 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> On Mon, 12 May 2008 19:19:05 -0700, Jimmy wrote:
> > Well, i know it may be a little non-python thing, however, I can think
> > of no place better to post this question :)
>
> > can anyone tell me, in python, how to obtain some information of a
> > running program?
> > paticularly, if i am playing some music in audacious or other media
> > player, how can i get the the name and some other info of current
> > playing song? It seems that audicious doesn't output on run-time
>
> In case of Audatious running on X11 all you need is Python X libraryhttp://python-xlib.sourceforge.net/
>
> And something like:
>
> from Xlib import display
>
> dpy = display.Display()
> root = dpy.screen().root
>
> NET_WM_NAME = dpy.intern_atom('_NET_WM_NAME')
> UTF8_STRING = dpy.intern_atom('UTF8_STRING')
>
> for win in root.query_tree().children:
>     try:
>         window_title = win.get_full_property(NET_WM_NAME,
> UTF8_STRING).value
>     except AttributeError:
>         continue
>     if window_title.endswith('Audacious'):
>         song = window_title.split(' - ')[:-1]
>         if song:
>             print song
>
> -- Ivan

 Thanks!
I also found a thing called 'audacious announcer' which can output
detail information of the playing track.
actually I'm working on a small program to display lyrics while
playing music in media player.


From rtw at freenet.co.uk  Sun May 18 16:37:19 2008
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sun, 18 May 2008 15:37:19 -0500
Subject: is there a bug in urlunparse/urlunsplit
References: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>
Message-ID: <Xns9AA2DC360FF5DrtwfreenetREMOVEcouk@216.196.109.145>

Alex wrote in news:09764c57-03ce-4ccb-a26d-
e851899dcc7c at a23g2000hsc.googlegroups.com in comp.lang.python:

> Hi all.
> 
> Is there a bug in the urlunparse/urlunsplit functions?
> Look at this fragment (I know is quite silly):
> 
> urlunparse(urlparse('www.example.org','http'))
> ---> 'http:///www.example.org'
>            ^^^^^

Try these 3:

  urlparse('www.example.org','http')
  urlparse('http://www.example.org','http')
  urlparse('//www.example.org','http')

The 1st returns www.example.org as the path part
with the other 2 its the location (domain) part.

Although it may not be immediately obvious that the result 
is correct, consider the follwing html fragment:

  <img src="aaa.gif">
  <img stc="http://anothersite.com/bbb.gif">

If you were to use urlparse to parse the src attributes
you would want:

  ( '', '', 'aaa.gif', '','','' )
  ( 'http', 'anothersite.com', '/bbb.gif', '','','' )


Which AIUI is what urlparse does.


Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From Tymoteusz.Jankowski at gmail.com  Wed May 28 02:00:59 2008
From: Tymoteusz.Jankowski at gmail.com (XLiIV)
Date: Tue, 27 May 2008 23:00:59 -0700 (PDT)
Subject: confused by HTMLParser class
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <19072836-23e5-4ff0-98ca-508d1f91bb3f@k30g2000hse.googlegroups.com>

On May 28, 3:20?am, globalrev <skanem... at yahoo.se> wrote:
> tried all kinds of combos to get this to work.
>
> http://docs.python.org/lib/module-HTMLParser.html
>
> from HTMLParser import HTMLParser
>
> class MyHTMLParser(HTMLParser):
>
> ? ? def handle_starttag(self, tag, attrs):
> ? ? ? ? print "Encountered the beginning of a %s tag" % tag
>
> ? ? def handle_endtag(self, tag):
> ? ? ? ? print "Encountered the end of a %s tag" % tag
>
> from HTMLParser import HTMLParser
> import urllib
> import myhtmlparser
>
> x = MyHTMLParser(HTMLParser())
> site = urllib.urlopen("http://docs.python.org/lib/module-
> HTMLParser.html")
> for row in site:
> ? ? print x.handle_starttag()

this works fine to me:


from HTMLParser import HTMLParser

class MyHTMLParser(HTMLParser):

    def handle_starttag(self, tag, attrs):
        print "Encountered the beginning of a %s tag" % tag

    def handle_endtag(self, tag):
        print "Encountered the end of a %s tag" % tag

#from HTMLParser import HTMLParser
import urllib
#import mythmlparser

site = urllib.urlopen("http://docs.python.org/lib/module-
HTMLParser.html")
x = MyHTMLParser()  #   x = MyHTMLParser(HTMLParser())
x.feed(site.read())
x.close()
for row in site:
    print x.handle_starttag()
site.close()


You should also read this:
http://www.diveintopython.org/html_processing/extracting_data.html
for example


From larry.bates at websafe.com`  Tue May 13 09:20:15 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 08:20:15 -0500
Subject: wxpython dialog - do something after ShowModal()?
In-Reply-To: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
Message-ID: <isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>

Iain King wrote:
> Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> up a file selector.  This all works fine, but the first thing the user
> has to do when they open the dialog is select a file, so I would like
> the dialog to automatically call the onBrowse function as soon as the
> dialog opens.  However, I don't know how to do this.
> 
> dlg.ShowModal()
> onBrowse()
> 
> obviously doesn't work, and neither does the reverse.  I was hoping
> that the dialog would throw some kind of "I have been shown" event,
> but it doesn't (as far as I can tell).  How do I make the dialog do
> something as soon as it's been shown?
> 
> Iain

If the only things on your modal dialog are Browse and cancel, just call the 
wx.FileDialog directly and eliminate the intermediate modal dialog.  If not 
don't bind the FileDialog to a button, just create an instance of it as the last 
  you do in the __init__ method of the modal dialog code.

If this doesn't help, you will have better luck posting to wxpython newsgroup.

-Larry


From mail at timgolden.me.uk  Tue May  6 07:44:49 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 12:44:49 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
Message-ID: <482044B1.5040906@timgolden.me.uk>

<<< No Message Collected >>>


From brian at briansmith.org  Mon May 26 15:46:48 2008
From: brian at briansmith.org (Brian Smith)
Date: Mon, 26 May 2008 12:46:48 -0700
Subject: Question about wsgi.input
In-Reply-To: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
Message-ID: <003801c8bf69$3e8e17b0$0202a8c0@T60>

> at the end of the previous read?

At the end of the previous read.

Web-SIG is the mailing list for WSGI and related stuff.

- Brian



From amit.uttam at gmail.com  Fri May 16 18:38:16 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 15:38:16 -0700 (PDT)
Subject: SImple python print question
Message-ID: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>

Hey there,

I have a simple question about python print statement. Take the
following code snippet for example...

1 print "-#- executing: %s" % section,
2 tests[section] = test.testcase(name=config.get(section,'name'))
3 tests[section].runTest()
4 printStatus(tests[section])

Now the problem is that line 1 does not get printed until line 4. What
I thought would happen is that line 1 gets executed and the user sees
that the statement that the test case is executing. Then after the
test case executes a "PASS" or "FAIL" appears on the same line as the
"-#- executing: 0053" statement.

e.g.
-#- executing: 0053     FAIL

Some tests take a long time to finish thus the screen is blank until
the entire test finishes and the above statement is outputted.

Thanks for any help.

Amit


From zerge69 at gmail.com  Tue May 27 18:19:53 2008
From: zerge69 at gmail.com (Zerge)
Date: Tue, 27 May 2008 15:19:53 -0700 (PDT)
Subject: Maximum items in a list?
Message-ID: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>

Hi,

Is there a theoretical limit to the number of items that can be
appended to a list?
thanks


From usenet at solar-empire.de  Thu May 22 15:48:19 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Thu, 22 May 2008 21:48:19 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <39vgg5-a9t.ln1@pluto.solar-empire.de>

Joel Koltner <zapwireDASHgroups at yahoo.com> wrote:
> Is there an easy way to get a list comprehension to produce a flat
> list of, say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]

I'm not sure I would recommend it, but try:

[v for x in range(4) for v in (x, 2 * x)]

> A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
> with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
> with "zip" to do so?

A similar solution as above should work.

Marc


From johnjsal at NOSPAMgmail.com  Fri May 23 09:13:50 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 23 May 2008 09:13:50 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
Message-ID: <4836c28e$0$25161$c3e8da3@news.astraweb.com>

"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4836747b$0$15488$426a74cc at news.free.fr...
> Ever heard of the "Model/View/Controller" pattern ?

Yes, I have, but I probably don't understand it well enough yet. For 
example, I don't  really know what is meant by phrases like "build a model", 
"the view registers itself with the model", "interations are sent to the 
appropriate controller" -- I may understand them literally, but I get the 
feeling that the implementation of these ideas are beyond me. I think it's 
mainly an issue of terminology, so probably I should just read up on MVC.

> The user interface doesn't need to be graphical. There were games and 
> emails clients and text editors before GUIs existed, you know ?

Of course, but I'm specifically asking about creating a program that has a 
GUI, and even more specifically it would be wxPython. 




From Georgina.Hindall at dea.gov  Fri May  9 18:02:09 2008
From: Georgina.Hindall at dea.gov (Georgina.Hindall at dea.gov)
Date: Sat, 9 May 2008 22:02:09 GMT
Subject: Protect yourself against Operation Sudden Fall
Message-ID: <0saodIfo6K.TfnSliFYQaDGL@news.dea.gov>

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands.  Encrypt your messages with one
of these:

   http://www.CryptoSMS.org
   http://www.CryptoSMS.com
   http://www.FortressMail.net/fortress_sms.htm
   http://www.Cop2p.com/encrypted_sms.html

Be Safe, Be Encrypted, Fuck the Police!!

--
No vital tablets lodge Lawrence, and they stealthily whisper Roberta too.


From darcy at druid.net  Sat May 24 16:46:08 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sat, 24 May 2008 16:46:08 -0400
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<g19fv3$3vl$1@gide.ita.chalmers.se>
	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
Message-ID: <20080524164608.5a803201.darcy@druid.net>

On Sat, 24 May 2008 21:14:36 +0200
David <wizzardx at gmail.com> wrote:
> Is it considered to be cheating if you make a test case which always
> fails with a "TODO: Make a proper test case" message?

Yes.  It's better to have the daily reminder that some code needs to be
finished.

> While it is possible to describe all problems in docs, it can be very
> hard to write actual test code.

It may be hard to start but once you have your framework in place it
becomes very easy.

> For example: sanity tests. Functions can have tests for situations
> that can never occur, or are very hard to reproduce. How do you unit
> test for those?

Believe me, thousands of people reading this are remembering situations
where something that couldn't possibly happen happened.

> A few examples off the top of my head:
> 
> * Code which checks for hardware defects (pentium floating point,
> memory or disk errors, etc).
> 
> * Code that checks that a file is less than 1 TB large (but you only
> have 320 GB harddrives in your testing environment).
> 
> * Code which checks if the machine was rebooted over a year ago.
> 
> And so on. These I would manually test by temporarily changing
> variables in the code, then changing them back. To unit test these you
> would need to write mock functions and arrange for the tested code to
> call them instead of the python built-ins.

Yes but the mock functions can be wrappers around the real functions
which only change the results that you are testing for.

> eg: You call function MyFunc with argument X, and expect to get result Y.
> 
> MyFunc calls __private_func1, and __private_func2.
> 
> You can check in your unit test that MyFunc returns result Y, but you
> shouldn't check __private_func1 and __private_func2 directly, even if
> they really should be tested (maybe they sometimes have unwanted side
> effects unrelated to MyFunc's return value).

It isn't your job to test __private_func1 and __private_func2 unless
you are writing MyFunc.

> Depends on the type of bug. If it's a bug which breaks the unit tests,
> then it can be found quickly. Unit tests won't help with bugs they
> don't explicitly cover. eg off-by-one, memory leaks, CPU load,
> side-effects (outside what the unit tests test), and so on.

No but when you find that your code breaks due to these problems that's
when you write new unit tests.

> But once you track down problems like the above you can write more
> unit tests to catch those exact bugs in the future. This is one case
> where I do favour unit tests.

Yes!  One of the biggest advantages to unit testing is that you never
ever deliver the same bug to the client twice.  Delivering software
with a bug is bad but delivering it with the same bug after it was
reported and fixed is calamitous.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From mbelzile at softimage.com  Thu May 15 10:57:55 2008
From: mbelzile at softimage.com (=?iso-8859-1?Q?Marc-Andr=E9_Belzile?=)
Date: Thu, 15 May 2008 10:57:55 -0400
Subject: Building python 2.5 fails on linux 64
Message-ID: <0BCB4AE868D8934A8B3DCE3A58126A8902151190@tewk-mbpf3>

Hi,
 
I have the following error when building python 2.5 (revision 63261)
 
./Parser/asdl_c.py -c ./Python ./Parser/Python.asdl
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "./Parser/asdl_c.py", line 7, in ?
    import os, sys, traceback
ImportError: No module named os
make: *** [Python/Python-ast.c] Error 1
 
I'm using gcc version 4.1.1 on Red Hat Enterprise Linux WS release 4 (Nahant Update 4)
 
What could be the problem ?
 
Thanks for helping.
 
-mab

 
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From josiah.carlson at gmail.com  Tue May 13 21:29:16 2008
From: josiah.carlson at gmail.com (Josiah Carlson)
Date: Tue, 13 May 2008 18:29:16 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com> 
	<cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>
Message-ID: <bf6afcf5-7b62-4f99-98d4-9097ecef531a@u6g2000prc.googlegroups.com>

On May 13, 9:35 am, "ludvig.eric... at gmail.com"
<ludvig.eric... at gmail.com> wrote:
> > In a pure world, the only writing that is done would be within the
> > handle_send() callbacks within the select loop.  Then again, in a
> > perfect world, calling readable() and writable() would have no strange
> > side affects (as your example below has), and all push*() calls would
> > be made within the handle_*() methods.
>
> It wouldn't have those side-effects if push really just pushed. :-P
>
> > We do not live in a pure world, Python isn't pure (practicality beats
> > purity), and by attempting to send some data each time a .push*()
> > method is called, there are measurable increases in transfer rates.
>
> -- 8< --
>
> > Yes, it would be convenient to not have push*() actually send data
> > when called in some cases, but in others, the increase in data
> > transfer rates and/or reduction in latency is substantial.
>
> If it increases transfer speed that much, the calling application
> almost has to be broken, or at least not designed as it should be - of
> course there are such applications, but you know...

It's not a matter of being broken at all, it's a matter of control
flow.  When we immediately try to send whenever a .push() call is
made, the underlying TCP/IP stack will accept a reasonably large
amount of data before it actually fills up (the most recent FreeBSD,
from what I understand, will accept up to 1 meg, which is how they are
able to saturate 10Gbit links), and by tossing the data into the the
TCP/IP buffer early, the data gets sent earlier, thus reducing
latency.

Further, because we are making more actual calls to socket.send(),
assuming the underlying TCP/IP buffer isn't filled (which may or may
not be a good assumption), and assuming that the link has more
capacity than is being used (usually the case on LANs and high-speed
internet links), putting more data into the buffer to be handled by
the underlying link layers will also increase transfer speeds.

When the socket.send() calls are delayed until the next pass through
the loop, and we aren't doing an initial send, then we don't get the
benefit of the underlying TCP/IP socket layer buffering.

In my experience over high-speed connections (LANs, Gbit WAN links,
local machine connections), I have found that increasing block sizes
to 32k to significantly improve performance for bandwidth constrained
applications, as there are far fewer blocks to toss to the underlying
layers, less Python code execution (Python 2.5 has a default block
size of 512 bytes, or 64x as much Python execution to send the same
amount of data, and one of the proposed 2.6 changes is to up this to a
more reasonable 4096 bytes), and more effective use of the TCP/IP
buffers (which are typically 64k or larger).

> Anyway, I went for a subclassing way of dealing with it, and it works
> fine.
>
> Thanks for the reply though, hadn't considered possibly "flawed"
> applications where the asyncore loop isn't revisited as often as it
> should. :->
> Ludvig

Again, it's not about the application being flawed, it's a matter of
control flow. ;)  Also, it's not a matter of any timeouts in the
select/poll loops (as Giampaolo suggested); if any socket is readable
or writable, those calls will return immediately (a few hundred
microseconds per call isn't bad).

 - Josiah


From wizzardx at gmail.com  Tue May  6 17:19:29 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 23:19:29 +0200
Subject: How do you debug memory usage?
In-Reply-To: <56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
References: <mailman.652.1210080485.12834.python-list@python.org>
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
Message-ID: <18c1e6480805061419u4164f093ke1e3f930d4f2af33@mail.gmail.com>

>
>  Here is my modified version of Chris' get_all_objects() function.
>  All I did was force garbage collection using gc.collect().
>  This makes sure that you are not counting objects that Python has
>  left in memory, but plans on deleting at some point.

Thanks for the logic.

I want to debug rdiff-backup (Python backup tool for Linux) - it's
using 2 GB of memory (1GB ram, 1GB swap) on a backup server at work.

I'll use your method to find out why this is happening. Even if it
doesn't give me exact details, it should be enough info to go by.

David


From bbxx789_05ss at yahoo.com  Sat May 17 13:54:55 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 10:54:55 -0700 (PDT)
Subject: Cookies and CookieJar
References: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>
Message-ID: <b9b30382-8234-42f1-b91a-15f128eda072@59g2000hsb.googlegroups.com>

On May 16, 9:21?am, Larry Bates <larry.ba... at websafe.com`> wrote:
> I'm struggling with a project using mechanize and cookies to screen scape a
> website. ?The site requires a client created cookie for authentication. ?Below
> is the code I'm attempting to use with the traceback I'm getting:
>
> ?>>> import Cookie
> ?>>> c=Cookie.SimpleCookie()
> ?>>> c["Manageopen"]="cards"
> ?>>> c['Manageopen']['expires'] = 0
> ?>>> c['Manageopen']['path'] = "/"
> ?>>> c['Manageopen']['domain'] = ".domain.com"
> ?>>> c['Manageopen']['secure'] = ""
> ?>>> c.output()
> 'Set-Cookie: Manageopen=cards; Domain=.domain.com; expires=Fri, 16-May-2008
> 14:06:00 GMT; Path=/'
> ?>>> import cookielib
> ?>>> cj=cookielib.CookieJar()
> ?>>> cj.set_cookie(c)
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> ? ?File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
> ? ? ?if cookie.domain not in c: c[cookie.domain] = {}
> AttributeError: 'SimpleCookie' object has no attribute 'domain'
> ?>>>
>
> I also tried:
>
> ?>>> cj.set_cookie(c["Manageopen"])
> Traceback (most recent call last):
> ? ?File "<interactive input>", line 1, in <module>
> ? ?File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
> ? ? ?if cookie.domain not in c: c[cookie.domain] = {}
> AttributeError: 'Morsel' object has no attribute 'domain'
>
> I've looked at everything I can find via Google and nothing seems to help.
>
> Thanks in advance.
>
> Regards,
> Larry

Hi,

In the python docs, set_cookie() is defined like this:

---
set_cookie(cookie)
Set a Cookie, without checking with policy to see whether or not it
should be set.
---

The Cookie mentioned there is a an object of the Cookie class which is
defined in the cookielib module.  On the other hand,
Cookie.SimpleCookie() creates an object of a class called SimpleCookie
(and SimpleCookie inherits from a class called BaseCookie).
Therefore, the object returned by Cookie.SimpleCookie() is not a
Cookie--it's a SimpleCookie.  Just because the module that contains
the SimpleCookie class is called Cookie does not mean that
SimpleCookie inherits from the Cookie class or that SimpleCookie has
any connection to the Cookie class located in the cookielib module.
If that's too confusing, here is the way the python modules are set
up:

Cookie module:
-------------
BaseCookie class
    |
    V
SimpleCookie class




cookielib module
----------------
Cookie class

CookieJar class
---set_cookie(Cookie)


What you did in your code was you supplied set_cookie() with a
SimpleCookie object, and set_cookie() expects a Cookie object.
SimpleCookie objects are a mapping and you access the data using the
notation:

> ?>>> c['Manageopen']['domain'] = ".domain.com"

But if you open up cookilib.py and look at the line in the error
message:

> File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie

you will see that the code uses the notation:

> ? ? ?if cookie.domain ...

That's because the Cookie class defines simple objects that have
attributes that are accessed normally, i.e. with dot notation.


> The site requires a client created cookie for authentication.

A "cookie" is just one of the headers in a request.  Instead of using
a url string to retrieve a web page with urllib2.urlopen(), you can
use a Request object.  And Request objects allow you to set headers,
which means you can set a cookie header.

But the site will probably check every subsequent request for that
cookie header as well, so that means you will need to add the header
to every subsequent request you make.  That is where CookieJar can
help you.  It can store cookies in a file and then automatically add
them to every request for you.  It's a bit complicated though.  See
here:

http://www.voidspace.org.uk/python/articles/cookielib.shtml












From upton at virginia.edu  Thu May 22 14:05:15 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 14:05:15 -0400
Subject: Books for learning how to write "big" programs
In-Reply-To: <c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
	<c266a7930805221049u1257e2a3vb12e48e5e965a885@mail.gmail.com>
Message-ID: <5504f9ac0805221105ib26fe95iba00cef52aa01c3c@mail.gmail.com>

On Thu, May 22, 2008 at 1:49 PM, Kurt Smith <kwmsmith at gmail.com> wrote:
> On Thu, May 22, 2008 at 10:55 AM, duli <dulipishi at gmail.com> wrote:
>> Hi:
>> I would like recommendations for books (in any language, not
>> necessarily C++, C, python) which have walkthroughs for developing
>> a big software project ? So starting from inception, problem
>> definition, design, coding and final delivery on a single theme
>> or application.
>
> The bigger the project, the more likely it is that you'll have
> documentation on how to use it (for a language or library, how to use
> the features in your program) but to take the time to write up a
> dead-tree book on the project's "inception, problem definition,
> design, coding and final delivery" is not likely well spent.  Anyone
> who has the expertise to write such a book would probably be spending
> his time working on the next phase of the project itself.
>
> Someone will probably respond with an amazon link to a book that does
> exactly what you're asking, in which case, I will stand corrected.
> But I'll be surprised.
>

Well, except for some higher-level textbooks.  For instance, I *think*
(not positive) that any of Appel's "Modern Compiler Implementation"
books give a pretty thorough treatment of implementing a compiler
(except for the obvious part where, since it's intended as a textbook,
some gaps are left for the student to fill in).  I also think the
recent edition of the Dragon book (Compilers: Principles, Techniques,
and Tools 2nd ed) has a complete compiler frontend in one of the
appendices (although you kind of have to mix and match to figure out
where in the book they've described the parts that lead to writing out
the code shown in the appendix).

-dan


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 14 03:26:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 14 May 2008 09:26:54 +0200
Subject: What is self.file = file for?
In-Reply-To: <f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
	<f88e0236-4a56-4e14-9bb7-e5815b16ba6d@t54g2000hsg.googlegroups.com>
Message-ID: <482a9438$0$21057$426a34cc@news.free.fr>

afrobeard a ?crit :

(top-post corrected. Please, do not top-post).

> On May 14, 3:08 am, wxPytho... at gmail.com wrote:
>> Hello!
>>
>> I have trouble understanding something in this code snippet:
>>
>> class TextReader:
>>     """Print and number lines in a text file."""
>>     def __init__(self, file):
>>         self.file = file
>>         .
>>         .
>>         .
>>
>> When would you do a thing like  self.file = file  ? I really don't
>> find an answer on this. Please help me understand this.
> 
> If you are familiar to C++ or a similar language, the concept of the
> this pointer might not be alien to you. self in this context is
> basically a reference to the class itself.

Nope. It's a reference to the instance.

> Hence self.file is creating
> a class member

Nope. It's setting an instance attribute.

> and setting to the input from file.
> 
> As Gary pointed out, during initialization, only the latter parameter
> i.e. file is being passed to __init__

Nope. Obviously, both parameters are passed - else it just wouldn't 
work. Given an object 'obj' instance of class 'Cls', you can think of 
obj.method(arg) as a convenient shortcut for Cls.method(obj, arg).


From inhahe at gmail.com  Thu May 22 18:14:53 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 18:14:53 -0400
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <JemZj.61574$3v1.54084@bignews3.bellsouth.net>

I don't like php.  I tried it once and I had it sort a list, but the list 
was apparently too long for its sorting function because it just sorted the 
first so-many elements of it and left the rest in order, and didn't generate 
any error.  I like a language that's actually determined by what you tell it 
to do.   I hear it has a lot of security issues too.  I'm not sure that php 
*runs* faster than python, having seen benchmarks, but it certainly loads 
faster.  Maybe not so much of a difference once python25.dll is already in 
the cache though (speaking from a windows perspective).  because when i load 
a program it can take a while but it's pretty quick if i'd just loaded one 
recently.  but you don't necessarily have to load python for each page 
rendering anyway.

I like the Python language a lot better than php.  but I just really like 
Python.

php mixes html and code out-of-the-box (sort of.. i guess it's more like a 
reversal of which one is explicit)... if you use Python you should look into 
a 'templating engine' like mako.  i use cheetah, but mako is supposed to be 
better.

i think Python is the easiest language to learn, with the possible exception 
of qbasic (just because making multidimensional arrays in python isnt that 
obvious, although maybe it is using numpy, i've never tried it).  Python 
isn't as easy as basic if you use/have to read the more advanced features, 
but those aren't even available in basic. so I find it a comfortable 
learning curve.
















From nick at craig-wood.com  Fri May 23 06:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 05:30:09 -0500
Subject: Why is math.pi slightly wrong?
References: <DFFEE4C74F4F7C469FCEFF12FC55A80D039D3FDF@mx6.ITN.LOCAL>
	<mailman.1477.1211476362.12834.python-list@python.org>
Message-ID: <slrng3d6dn.3re.nick@irishsea.home.craig-wood.com>

Jerry Hill <malaclypse2 at gmail.com> wrote:
>  On Thu, May 22, 2008 at 12:32 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:
> > I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
> >
> > Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
> 
>  I believe this is an issue with the precision of IEEE floating point
>  numbers[1].  Those are the types of numbers used by the hardware
>  floating point processor on your CPU.  I'm not an expert, by any
>  stretch of the imagination, but I believe you have two choices to
>  represent pi as an IEEE double precision float:
> 
>  3.1415926535897931 (stored as 0x400921FB54442D18) or
>  3.1415926535897936 (stored as 0x400921FB54442D19)

Just in case you were wondering how you get those hex numbers (like I
was!)

  >>> import math
  >>> import struct
  >>> struct.pack(">d", math.pi).encode("hex")
  '400921fb54442d18'
  >>> struct.unpack(">d", "400921FB54442D18".decode("hex"))
  (3.1415926535897931,)
  >>> struct.unpack(">d", "400921FB54442D19".decode("hex"))
  (3.1415926535897936,)
  >>> 

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mmanns at gmx.net  Sun May 25 08:34:34 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 25 May 2008 14:34:34 +0200
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
	<g1bl71$1id1$1@news.mtu.ru>
Message-ID: <g1bmcq$9ve$1@aioe.org>

On Sun, 25 May 2008 12:14:25 +0000 (UTC)
Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

> On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
> 
> Maybe make a set of code objects?
> 
> func_code_set = set([f.func_code for f in funclist])
> 
> funclist = []
> for fc in func_code_set:
>     f = lambda x: x
>     f.func_code = fc
>     funclist.append(f)

Works for me.

Thanks

Martin


From arnodel at googlemail.com  Fri May  9 02:22:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 07:22:15 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.817.1210288386.12834.python-list@python.org>
	<6a0e537e-2487-4bed-b84c-3b84ae46aaa4@b5g2000pri.googlegroups.com>
Message-ID: <m2r6cc3sko.fsf@googlemail.com>

Dan Bishop <danb_83 at yahoo.com> writes:

> On May 8, 6:14?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
>> On Thursday 08 May 2008 06:54:42 pm wxPytho... at gmail.com wrote:
>>
>> > The problem is that Python parses -123**0 as -(123**0), not as
>> > (-123)**0.
>>
>> Actually, I've always written it as (-123)**0. At least where I'm from,
>> exponentiation takes precedence even over unary "-". (to get a power of -123,
>> you must write $(-123)^0$ [latex])
>
> FWIW, my TI-89 evaluates it as -1.
>
>> Though not an authoritative source, wikipedia also uses the (-x)^y
>> notation:http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one
>>
>> Btw, there seems to be a math problem in python with exponentiation...
>>
>> >>> 0**0
>>
>> 1
>>
>> That 0^0 should be a nan or exception, I guess, but not 1.
>>
>> [just found out while trying the poster's example]
>
> Technically correct, but 0**0 == 1 is actually pretty useful.  For one
> thing, it lets you create a Vandermonde matrix without making 0 a
> special case.

If we want Binomial expansion to work sanely, we need 0^0 = 1, e.g:

(x+0)^2 = 1*x^2*0^0 + 2*x*0 + 1*x^0*0^2
        = x^2

Therefore 0^0 = 1

Also, x^y (for x, y natural numbers) can be defined as the number of
functions from Y to X where |X|=x and |Y|=y.  As there is exactly one
function from the empty set to the empty set, 0^0 = 1.

The arguments for making 0^0 = 0 are weak, it is a bit more convincing
to want it to be undefined (as (0,0) is a point of discontinuity of
(x,y) -> x^y).
-- 
Arnaud


From gagsl-py2 at yahoo.com.ar  Wed May 14 00:02:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 01:02:33 -0300
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<mailman.1041.1210675826.12834.python-list@python.org>
	<537c541a-4e96-404b-81c3-68ffa9a025b8@b64g2000hsa.googlegroups.com>
	<3ef2200e-5520-4fcf-9f2c-8667fc1733c4@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua4lijavx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 10:23:33 -0300, gsal <salgerman at gmail.com> escribi?:

> hhhmmm...py2exe...I tried it earlier and it couldn't handle some of
> the packages I was using because they were in the "egg" form.  I was
> hoping Installer could...then again, I don't know how long ago
> Installer was written and whether eggs came along after that...

http://www.py2exe.org/index.cgi/ExeWithEggs
PyInstaller has the same problem regarding eggs: see  
http://pyinstaller.python-hosting.com/wiki/FAQ
(did I menction that I hate eggs?)

-- 
Gabriel Genellina



From daveparker at flamingthunder.com  Wed May 21 22:46:10 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 19:46:10 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com> 
	<afde1418-8f7b-4616-aecf-b4d3c3d2a222@j33g2000pri.googlegroups.com> 
	<12071a08-5c5d-4541-bc34-ed1f1ac4e96f@8g2000hse.googlegroups.com>
Message-ID: <dd2856c7-c408-4d6f-bd93-811211b95019@g16g2000pri.googlegroups.com>

On May 21, 7:49?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> I've thought of one possible drawback: "a" and "an" can be used as
> variables, so the "is a" part might cause a problem. You'd need to
> check the parser to find out...

Good point, I hadn't noticed that.  I'll check it out.


From mabbikeel at gmail.com  Sun May 18 14:22:57 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 19:22:57 +0100
Subject: [jcd@sdf.lonestar.org: Re: Compress a string]
References: <20080518181357.GB14680@sdf.lonestar.org>
Message-ID: <op.ubc30jbc4fd8pl@mp1206-hp.config>

On Sun, 18 May 2008 19:13:57 +0100, J. Clifford Dyer  
<jcd at sdf.lonestar.org> wrote:

> On Sun, May 18, 2008 at 07:06:10PM +0100, Matt Porter wrote regarding  
> Compress a string:
>>
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"
>>
>> The code I have so far feels like it could be made clearer and more
>> succinct, but a solution is currently escaping me.
>>
>>
>> def compress_str(str):
>>     new_str = ""
>>     for i, c in enumerate(str):
>>         try:
>>             if c != str[i+1]:
>>                 new_str += c
>>         except IndexError:
>>             new_str += c
>>     return new_str
>>
>>
>> Cheers
>> Matt
>
> def compress_str(s):
>     # str is a builtin keyword. Don't overload it.
> 	out = []
> 	for c in s:
> 		if out and c == out[-1]:
> 			out.append(c) # This is faster than new_str += c
> 	return ''.join(out)
>
>

Thanks. Had to change a few bits to make it behave as I expected:

def compress_str(s):
     # str is a builtin keyword. Don't overload it.
     out = [s[0],]
     for c in s:
         if out and c != out[-1]:
             out.append(c) # This is faster than new_str += c
     return ''.join(out)

Feels slightly less hacked together


> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
--



From banibrata.dutta at gmail.com  Tue May  6 14:16:40 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 23:46:40 +0530
Subject: How do you debug memory usage?
In-Reply-To: <18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
	<18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>
	<18c1e6480805060804h33b54268o9a3cb5545909926e@mail.gmail.com>
Message-ID: <3de8e1f70805061116p75b6b0bcn30f43ba757ab37@mail.gmail.com>

Ah yes. Thanks for posting your finding. Had come accross Heapy, earlier,
but forgotten about it completely.


On Tue, May 6, 2008 at 8:34 PM, David <wizzardx at gmail.com> wrote:

> >
> >  I'll check a few of those results and post to the list if I find
> something good.
> >
>
> It looks like Heapy, part of the Guppy project can do this:
>
> http://guppy-pe.sourceforge.net/#Heapy
>
> David.
>
>
>
>
>
>
> David.
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
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From inhahe at gmail.com  Sat May 17 15:03:51 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 15:03:51 -0400
Subject: help compiling Python on vs 2008!
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
Message-ID: <QZFXj.6721$255.5738@bignews8.bellsouth.net>


"Christian Heimes" <lists at cheimes.de> wrote in message 
news:mailman.1270.1211029209.12834.python-list at python.org...
> inhahe schrieb:
>> what is going on here, and how do I compile these external libraries?
>
> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
> supported. Some extensions don't compile under VS 9.0
>
> Christian
>

I just installed Visual Studio 8 and tried compling and I bgot the same 
problem.  hope this isn't a redundant post. i don't know if 
pyhon-list at python.org reposts here.




From jeffrey at fro.man  Wed May 21 16:55:40 2008
From: jeffrey at fro.man (Jeffrey Froman)
Date: Wed, 21 May 2008 13:55:40 -0700
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <FYqdnZI06dbQEanVnZ2dnUVZ_u2dnZ2d@cablespeedwa.com>

notbob wrote:

> I
> persevere because it's more fun/challenging than video games


This is the crux of the matter from where I'm sitting. If the purpose of
learning a programming language is fun, then the primary relevant question
is:

        Is it more fun to code in Python or PHP?

The answer is a no-brainer for me. It seems to me that Python is designed
from the ground up with my enjoyment in mind. Your Fun May Vary :-)


Jeffrey


From sjmachin at lexicon.net  Tue May 13 17:38:28 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 21:38:28 GMT
Subject: help with file path exceeding 255 characters
In-Reply-To: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <482a0a52@news.mel.dft.com.au>

yguan08 at gmail.com wrote:
> I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
> 
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
> 
> fsize = os.path.getsize(fullpath)
> 
> 
> WindowsError: [Error 206] The filename or extension is too long:
> 
> The same thing with os.stat(fullpath).
> 
> I tried using the relative path, but it does not work with the message
> fname not found.
> 
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)

I suspect that the cause of the problem here is that while *x OSes have 
just one current working directory, Windows has one cwd per drive.

> filesize = os.path.getsize(fname)
> 
> Is there a walk around of this?

At the DOS command level, you can do
     subst x: very\long\path
and then refer to
     x:filestem.ext
where x is any unused drive letter.

This seems to work:

 >>> import os
 >>> os.system('subst x: c:\\junk')
0
 >>> f = open('x:foo.py')
 >>> f.read()
"print 'hello'\n"
 >>>

HTH,
John


From daveparker at flamingthunder.com  Wed May 21 23:27:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 20:27:05 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>
Message-ID: <a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>

On May 21, 7:01?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> The crucial thing is not to slow down the calculations with useless
> bells and whistles.

Are you running your simulations on a system that does or does not
support the "useless bell and whistle" of correct rounding?  If not,
how do you prevent regression towards 0?

For example, one of the things that caused the PS3 to be in 3rd place
behind the Wii and XBox 360 is that to save a cycle or two, the PS3
cell core does not support rounding of single precision results -- it
truncates them towards 0.  That led to horrible single-pixel errors in
the early demos I saw, which in term helped contribute to game release
delays, which has turned into a major disappointment for Sony.


From denis.kasak at gmail.com  Sun May 25 18:29:41 2008
From: denis.kasak at gmail.com (Denis Kasak)
Date: Mon, 26 May 2008 00:29:41 +0200
Subject: Getting a set of lambda functions
In-Reply-To: <39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
References: <g1bjcj$u3m$1@aioe.org>
	<39e19a010805250611r6e27aafbha4f1a9d79b830626@mail.gmail.com>
Message-ID: <39e19a010805251529t51787e17ybd7b12297b79755a@mail.gmail.com>

On Sun, May 25, 2008 at 1:43 PM, Martin Manns <mmanns at gmx.net> wrote:
> Hi,
>
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda
> functions to use this property for comparison).
>
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution
> is not important.)
>
> How can I achieve this?
>
>>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>>>> len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False

Isn't this a bug? Shouldn't it be possible to create a set of
different lambda functions via a loop? At first I thought it was just
a quirk of list comprehensions, but the following example also yields
incorrect (or at least unintuitive) results:

>>> spam = []
>>> for i in range(10):
...   spam.append(lambda: i)
>>> spam[0]()
9
>>> spam[1]()
9

Manually creating the lambdas and appending them to a list works as
expected, naturally; I don't see a good reason why it wouldn't work
with a loop. Am I missing something?

--
Denis Kasak


From alan.wright at volubill.com  Mon May 19 11:25:28 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 16:25:28 +0100
Subject: Newbie: Keep TCP socket open
Message-ID: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>

Hi Folks,
I am newbie to Python, but have successfully created a simple client and 
server setup, I have one issue though.

I am trying to test a box by sending many TCP conns (WHILE loop) but not 
closing them with a FIN/RST. However, no matter what i do, i cannot get the 
loop to stop sending FIN from the client.

Any clues?

Here is my current script

#!/usr/bin/python

import socket,sys
from numpy import *
num1=0

while (num1<=10) :

 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.settimeout(10.0)
 s.connect(("10.1.1.69", 50008)) # SMTP
 print s.recv(1024) + '\n',
 num1=num1+1
 #s.close()


sys.exit(1) 




From deets at nospam.web.de  Sun May 25 09:26:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 15:26:16 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <4ob*BLLds@news.chiark.greenend.org.uk>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
	<69t1m5F33b3ncU2@mid.uni-berlin.de>
	<4ob*BLLds@news.chiark.greenend.org.uk>
Message-ID: <69t7nrF3526bjU1@mid.uni-berlin.de>

Matthew Woodcraft schrieb:
> Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Sebastian 'lunar' Wiesner schrieb:
>>> I guess, Apache does some kind of memory caching for files, which are often
>>> requested and small enough to fit into the system memory.  May be, that's
>>> what the OP is referring to ...
> 
>> I'm not aware of that, and I even more seriously doubt it. Because 
>> caching is a complicated, domain-dependend subject that would 
>> *immediately* cry for configuration - e.g. caching strategies and such.
> 
> This is available in current apache with mod_file_cache (for an
> explicitly configured list of files). I think the circumstances where
> you'd want to use it are quite rare.

As I said - explicit configuration is needed. And of course apache & 
it's module system are flexible enough to allow caching as add-on. But 
Sebastian speculated about some behind the scenes automatic caching. 
Which apparently isn't there.

Diez


From gnewsg at gmail.com  Fri May  2 23:01:34 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 20:01:34 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
Message-ID: <80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>

On 2 Mag, 21:41, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > My hosting company provides me a common IPv4 address.
> > I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> > really matter) to temporarily use IPv6 for trying to add such feature
> > to my library (I work on both Windows XP and Linux).
> > Could someone point me to some resources describing how could I do
> > that?
>
> Information is spread widely. If you really want resources, I recommend
> to google for them; there are various IPv6 howtos.
>
> Here is how I would do it:
>
> On Linux, "modprobe ipv6", then "ifconfig". This should display the
> loopback adapter, with the address "::1". You should then be able to
> listen on that address, and connect to it.
>
> On Windows (XP SP2), "netsh int ipv6 install". Again, you should be able
> to use IPv6 loopback afterwards.
>
> If you want true connectivity to the global IPv6 internet, I recommend
> SixXS (http://www.sixxs.net/). You can setup a tunnel to the IPv6 net
> through your IPv4 POP, using a close IPv6 POP who participates in SixXS.
> To set up the tunnel, you then use aiccu, which works really well for
> me (and is packaged conveniently as a Debian package).
>
> Regards,
> Martin

Thanks a lot. I've been able to listen on ::1:21 after having
installed IPv6 on both Windows and Linux thanks to your suggestions.
I'd like to ask one more question: is it possible to bind my server on
both IPv4 and IPv6 addresses (note: I do not use multiple threads or
processes)?


---- Giampaolo
http://code.google.com/p/pyftpdlib


From roy at panix.com  Fri May  2 14:38:47 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 14:38:47 -0400
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
	<roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>
	<1029ba0a-74e0-41d3-8397-7e326f4611bf@a9g2000prl.googlegroups.com>
Message-ID: <roy-1A07DD.14384602052008@70-1-84-166.area1.spcsdns.net>

In article 
<1029ba0a-74e0-41d3-8397-7e326f4611bf at a9g2000prl.googlegroups.com>,
 mp <mailpitches at email.com> wrote:

> Thanks Roy. I was just trying to understand someone else's code, but
> in the end it turns out that this was just a bug.
> 
> What weirded me out was how injecting a print statement preventing the
> error from occurring, but now I get it. Without blocking, the
> connection handshake occurs in parallel after the connect_exc method
> is called. In my example, my processor reaches the send call before
> the connection manages to complete in the background. However, if you
> stick in a print statement after the connect_exc call and before the
> send call, it delays processing just long enough for the connection to
> complete, thus no exception is thrown by the send call.

I don't really understand that last part.  There shouldn't be any 
background processing going on, unless there's a lot more code than you 
showed.

The three-way handshake *can't* happen in the background, because 
connect_ex() has no way to know what value to return until the handshake is 
completed.  Let's say I send a SYN, and 15 seconds later, you send a RST 
(indicating that the connection has been refused).  The connect_ex() call 
has to have waited the 15 seconds for this to happen so it knows to return 
an appropriate error code.

I do not understand why sticking a print statement in there should make any 
difference.


From gherron at islandtraining.com  Sat May 17 11:58:08 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 08:58:08 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
Message-ID: <482F0090.4030003@islandtraining.com>

Marlin Rowley wrote:
>  
> Very cool.
>  
> > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> a represents a tile with height of 2 and width of 4 with 4 bits/pixel 
> for each color.
>  
> > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
> this seperates the stream into individual values - Check
>  
> > >>> b.shape=(2,4,4)
>
> This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check
>  
>  >>> c = b.transpose((2,0,1))
>  
> What does the (2,0,1) represent in terms of width and height and 
> number of bytes?

The (2,0,1) tells how to exchange the axes.  For instance in a 2D array, 
a normal transpose exchanges rows and columns.  It will change a (a by 
b) sized array into a (b by a) sized array.  This would be equivalent to 
the more saying interchange axes 0,1 to the new order of 1,0. 

In numpy with higher dimension arrays, the default transpose just 
exchanges the first two axes, and the full transpose allows you to 
specify exactly the new ordering of the exes.  

So transpose((2,0,1))  means take axes (0,1,2) to the new order 
(2,1,0).  In terms of sizes, an (a by b by c) sized array will end being 
of size (c by a by b) in size. 

In terms of implementation, there may not be *any* data re-arrangement 
in a transpose.   The only thing that needs changing is how the indices 
are converted to an actual machine address of an indexed item.   The 
documentation notes this by saying transpose returns a "new view" of the 
array.   This explains why I copied the array before extracting bytes 
out of it -- you really do need the elements in the new order for the 
next operation.

Gary Herron

>
>
>
>
>  
> ------------------------------------------------------------------------
>
> > Date: Fri, 16 May 2008 17:08:20 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com; python-list at python.org
> > Subject: Re: numpy.frombuffer != unpack() ??
> >
> > Marlin Rowley wrote:
> > > All:
> > >
> > > Say I have an array:
> > >
> > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > >
> > > How do I make it so that I now have:
> > >
> > > starting with first element (a[0])
> > > new_arr[0] = 'r'
> > > new_arr[1] = 'g'
> > > new_arr[2] = 'b'
> > > new_arr[3] = 'a'
> > > new_arr[4] = 'r'
> > > .....
> > >
> > > continuing "through" a[1] with the same new_arr
> > > new_arr[N] = 'r'
> > > new_arr[N+1] = 'g'
> > > ....
> > >
> > > -M
> >
> > Numpy can do this for you. First, do you really mean the array to
> > contain lists of one string each? If so:
> >
> > >>> import numpy
> > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a
> > kludge here
> > >>> b
> > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',
> > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
> > 'b', 'b', 'a', 'a', 'a', 'a'],
> > dtype='|S1')
> > >>> b.shape=(2,4,4)
> > >>> b
> > array([[['r', 'r', 'r', 'r'],
> > ['g', 'g', 'g', 'g'],
> > ['b', 'b', 'b', 'b'],
> > ['a', 'a', 'a', 'a']],
> >
> > [['r', 'r', 'r', 'r'],
> > ['g', 'g', 'g', 'g'],
> > ['b', 'b', 'b', 'b'],
> > ['a', 'a', 'a', 'a']]],
> > dtype='|S1')
> > >>> c = b.transpose((2,0,1))
> > >>> c
> > array([[['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']],
> >
> > [['r', 'g', 'b', 'a'],
> > ['r', 'g', 'b', 'a']]],
> > dtype='|S1')
> > >>> d=c.copy() # To make it contiguous
> > >>> d.shape = (32,)
> > >>> d
> > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',
> > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
> > 'b', 'a', 'r', 'g', 'b', 'a'],
> > dtype='|S1')
> >
> > Done. Cool no?
> >
> > Gary Herron
> >
> > >
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > From: marlin_rowley at hotmail.com
> > > To: robert.kern at gmail.com; python-list at python.org
> > > Subject: RE: numpy.frombuffer != unpack() ??
> > > Date: Fri, 16 May 2008 17:31:30 -0500
> > >
> > > Thank you! That solved it!
> > >
> > > -M
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > > To: python-list at python.org
> > > > From: robert.kern at gmail.com
> > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > > Date: Fri, 16 May 2008 17:25:00 -0500
> > > >
> > > > Marlin Rowley wrote:
> > > > > All:
> > > > >
> > > > > I'm getting different floating point values when I use numpy
> > > vs. unpack().
> > > > >
> > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> > > > > buffer = unpack("!f", byte)
> > > > >
> > > > > frgba[0] != buffer[0]
> > > > >
> > > > > why? This is forcing me use the unpack() function since it's
> > > giving me
> > > > > the correct values. What am I doing wrong?
> > > >
> > > > Endianness, perhaps? '!' specifies big-endian data (an alias for
> > > '>'). Most
> > > > likely, you are on a little-endian platform. All of the dtypes
> > > in numpy default
> > > > to the native-endianness unless specified. If you want to read
> > > big-endian data
> > > > using numpy, do this:
> > > >
> > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
> > > >
> > > > If you have any more problems with numpy, please join us on the
> > > numpy mailing
> > > > list. When reporting problems, please try to provide a small but
> > > complete
> > > > snippet of self-contained code, the output that you got, and
> > > explain the output
> > > > that you expected to get. Thank you.
> > > >
> > > > http://www.scipy.org/Mailing_Lists
> > > >
> > > > --
> > > > Robert Kern
> > > >
> > > > "I have come to believe that the whole world is an enigma, a
> > > harmless enigma
> > > > that is made terrible by our own mad attempt to interpret it as
> > > though it had
> > > > an underlying truth."
> > > > -- Umberto Eco
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > E-mail for the greater good. Join the i?m Initiative from
> > > Microsoft.
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > E-mail for the greater good. Join the i?m Initiative from Microsoft.
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Keep your kids safer online with Windows Live Family Safety. Help 
> protect your kids. 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From shiningsandy at gmail.com  Mon May 19 05:59:22 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 02:59:22 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
Message-ID: <9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>


hi
the py code that i have written is here.when i run this code i wont
get any errors it just works fine for me.but when i created the exe i
start getting an error in my 'getMailContent' function. The error
description is

TypeError:unsupported operand type(s) for :- 'instance' and 'int'

i dont know why i am start getting this error when i run it through
the exe.


import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    for kk in range(len(obj.Items),1,-1):
    #for kk in range(len(obj.Items-1),0,-1):
        #print 'hello'
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        writeData(mailItem,txt_file)

        #print mailItem.OlSaveAsType.olMSG
        #saveCopy(mailItem)
        #print "sender="+mailItem.SenderName+'
SenderEmailId='+str(mailItem.SenderEmailAddress)+'
Time='+str(mailItem.ReceivedTime)
        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)

    txt_file.close()
    '''
    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
    file_zip.write('data.log')
    file_zip.close()
    '''

#function to create a directory
#obviously not a best way :-( but i think can expected this sort of
mistakes from beginners
def createDir():
    path=os.path.abspath("\email")
    if(os.path.exists(path)):
        print "Directory already exists"
    else:
        os.system("md "+path)

#function to save a copy of email
def writeData(mailItem,file):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    getAttachmentInfo(mailItem.Attachments)
    file.write(getHTMLString(dataToWrite))
    #checkStringType(dataToWrite)

def getAttachmentInfo(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        #print "File Name="+atmt.FileName+'
DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
        abc=os.path.isdir(os.getcwd()+'\email')

        if(abc==True):
            print 'directory exists'

        else:
            os.mkdir(os.getcwd()+'\email')

        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)



# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):

    if isinstance(a,str):
       b='not a unicode string'

    else:
        a.encode('utf-8')
        #print 'unicode type'

    return a

#function to save the coopy of an email
#:-( but smhow it generate error whenever i make a call to it
def saveCopy(mailItem):

    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
    print name
    #global outlook_app
    try:
        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
    except BaseException:
        print BaseException

def getHTMLString(b):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+b+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    #print outlook_app.OlSaveAsType.olMSG
    print '=================='
    print dir(outlook_app)
    print '=================='
    inbox_obj=getOutLookFolders(outlook_app)
    print dir(inbox_obj)
    print (inbox_obj.Items)
    #saveCopy(inbox_obj.Items[1])
    getMailContent(inbox_obj)



main()


my setup file has this code

from distutils.core import setup
import py2exe

setup(console=['outlook.py'])


i have just copied and pasted it from the tutorial available at the
py2exe site and changed the filename with mine filename.


thanks and regards
sandeep kumar sharma

> There is nothing special in executables produced by py2exe. I mean
> that the debugging strategy is as always. A good start might be in
> adding logging\tracing facilities both to script and the executable.
> Comparing two trace files could give you some clue.


From inhahe at gmail.com  Thu May 22 13:26:04 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:26:04 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <b%hZj.78700$%15.7454@bignews7.bellsouth.net>


"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1476.1211475183.12834.python-list at python.org...
> I've noticed that the value of math.pi -- just entering it at the 
> interactive prompt -- is returned as 3.1415926535897931, whereas (as every 
> pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the 
> end.)
>
> Is this a precision issue, or from the underlying C, or something else? 
> How is math.pi calculated?
>
> I searched for this on the web and in this group and couldn't find 
> anything -- but humble apologies if this has been asked before/elsewhere.
>
> Sam Dutton
>

it's gotta be a precision issue.  floating point numbers are stored on 
computers in binary.  you can't necessarily change the last digit from 1 to 
2 just by changing the last bits.  try converting a value after the decimal 
point to the same value after a decimal point in binary.  there's no telling 
how many bits it'll take.  and sometimes even, what isn't a repeating 
decimal in one base is in another base.

i see these precision issues raised all the time.
"why is my value resulting in 3.61000000001?"
the answer is because you can't store 3.61 in binary.
(i don't know specifically about that number, just an example)

(i know you can, if you use some sort of binary representation of decimal 
digits... but that's not how it's usually done.  it's stored pretty much 
like in scientific notation but in base 2.)







From fred.sells at adventistcare.org  Fri May  9 11:18:24 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Fri, 9 May 2008 11:18:24 -0400
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B08FB@acesxch01.ADVENTISTCORP.NET>

write working programs

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of Raxit at MyKavita.com
> Sent: Thursday, May 08, 2008 6:25 AM
> To: python-list at python.org
> Subject: Newbie to python --- why should i learn !
> 
> 
> Hi,
> 
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?
> 
> what can i do easily with python which is not easy in c++/java !?
> 
> Tnx,
> Raxit
> www.mykavita.com
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From tjreedy at udel.edu  Wed May 14 23:58:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 23:58:50 -0400
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
	<c40b3f66-2ffc-4654-ad85-782bd25d5312@i36g2000prf.googlegroups.com>
Message-ID: <g0gcdm$sre$1@ger.gmane.org>


"Raymond Hettinger" <python at rcn.com> wrote in message 
news:c40b3f66-2ffc-4654-ad85-782bd25d5312 at i36g2000prf.googlegroups.com...
On May 14, 8:24 am, Tal Einat <tal.no.no.s... at gmail.com> wrote:
> I just ran into this. In IDLE (Python 2.5), the call-tip for
> itertools.count is:
> "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

| My IDLE (1.2.2 running on Python 2.5.2) has the correct call-tip.

As does my 3.0 version. count([first_val]) -> count object 





From davidj411 at gmail.com  Wed May 28 13:41:51 2008
From: davidj411 at gmail.com (davidj411)
Date: Wed, 28 May 2008 10:41:51 -0700 (PDT)
Subject: convert string number to real number - ValueError: invalid 
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com> 
	<mailman.1676.1211955740.12834.python-list@python.org>
Message-ID: <a58a0995-dfe5-4e2c-a0c1-886fc0a2353a@a1g2000hsb.googlegroups.com>

On May 28, 2:22?am, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> David Jackson wrote:
> > i used the csv module and saved its contents to a list.
>
> > ['Date', 'No.', 'Description', 'Debit', 'Credit']
> > ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> > ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
>
> > the credit/debit fields are strings.
> > what should i have done within the CSV module to make numbers appear as
> > numbers?
> > how can i remove the quotes to make them numbers? i realize i posted a
> > solution to this once before (same posting thread) but i am thinking
> > there is a better method.
>
> There doesn't seem to be a way to describe how specific columns should
> be processed in the csv module. ?You could define a conversion function
> that "guesses" the best conversion, for example:
>
> def str2num(datum):
> ? ? ? ? try:
> ? ? ? ? ? ? ? ? return int(datum)
> ? ? ? ? except:
> ? ? ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? ? ? ? ? return float(datum)
> ? ? ? ? ? ? ? ? except:
> ? ? ? ? ? ? ? ? ? ? ? ? return datum
>
> for row in csv.reader(file(r'Transaction.csv')):
> ? ? ? ? [str2num(cell) for cell in row]
>
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', 5678, 'ELECTRONIC PAYMENT', '', 11.449999999999999]
> ['3/04/2007', 5678, 'THE HOME DEPOT 263 SomeCity FL', '',
> 25.399999999999999]
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I like the str2num function approach, but then i get left with a float
that has more than 2 decimal spaces , i.e. 11.50 becomes
11.449999999999999 and round will not fix that.


From saluk64007 at gmail.com  Wed May 14 21:26:51 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Wed, 14 May 2008 18:26:51 -0700
Subject: Passing functions around and executing
In-Reply-To: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
Message-ID: <c3f69bf60805141826nc243e25k7713dc82195fef02@mail.gmail.com>

Here's a quick dumb example, hope it helps:

def function1(a,b,c):
   print a,b,c
def function2(x):
   print x
def function3(y):
   print y+3

def executeall(list):
   print "setting up"
   for function,args in list:
      function(*args)   #Calls the function passing in the arguments

mylist = [[function1,(1,2,3)],[function2,("green",)],[function3,(5.5,)]]
executeall(mylist)

---------
The hard part is the fact that you mentioned some arguments need to be
passed in, some of the time.  This kind of situation makes the most sense if
all of the functions take the same arguments (or no arguments).  Then you
could just do this:
--------------------
def function1():
   print 1
def function2():
   print 2
def function3():
   print 3

def executeall(list):
   print "setting up"
   for function in list:
      function()

mylist = [function1,function2,function3]
executeall(mylist)
--------------------------
So you see, treating functions as regular objects and passing them around,
is as easy as not putting the call operator (parenthesis) to the right of
the function name.

print function   #Prints the representation of the function object
print function()  #Calls the function and then prints what the function
returns

Hope it helps.
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From ivan.illarionov at gmail.com  Wed May  7 19:58:43 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 23:58:43 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
Message-ID: <fvtfni$6pj$2@news.mtu.ru>

On Wed, 07 May 2008 23:46:33 +0000, Ivan Illarionov wrote:

> On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
> 
>> Is there a way to do:
>> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>> x[0,2:6]
>> 
>> That would return:
>> [0, 3, 4, 5, 6]
> 
> IMHO this notation is confusing.
> 
> What's wrong with:
> [0]+x[2:6]
>  
>> I am surprised this notation is not supported, it seems intuitive. A
>> concrete example of the sort of thing I want to do:
>> 
>> p = file('/etc/passwd').readlines()
>> q = [ e.strip().split(':')[0,2:] for e in p ]
>> 
>> (getting rid of the password / x field)
> 
> This works and is clearer:
> [[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]

or maybe you wanted to do this:

>>> [e.split(':')[0] for e in open('/etc/passwd')]
['root', 'daemon', 'bin', 'sys', 'sync', ...]

What are you trying to get from /etc/passwd?

-- 
Ivan



From inhahe at gmail.com  Wed May 21 18:51:07 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 18:51:07 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
Message-ID: <XF1Zj.78287$%15.22707@bignews7.bellsouth.net>

something randomly made me realize why my second solution didn't work, so i 
fixed it.  now you have a working persistent deque.

1. if you call somepdequeobject.load(filename) (as opposed to 
pdeque.load(filename)), do you want it to return a new object that it loaded 
from file, or do you want it to change somepdequeobject to be the object in 
the file?  i'm not sure which way is canonical.

2. i'm not sure if i actually have to use a temp file and then copy it. i 
don't know if pickle.dump as an "atomic commit".

3. cPickle would be faster but i think that means you might end up storing 
something in your deque that can't be pickled, like a circular reference, 
and dunno what else.

4. can someone tell me if the way i'm using the decorator is sane?  i've 
never used decorators before. it just seems ridiculous to a) define a lambda 
that just throws away the parameter, and b) define a meaningless function to 
pass to that lambda.

5. Of course, I am a genius.

from collections import deque
import os, pickle, random

class pdeque(deque):
  def __init__(self, filename, initial=None):
    if initial is None: initial = []
    deque.__init__(self, initial)
    self.filename = filename
    self.tempfilename = ''.join((random.choice("abcdefghijklmnopqrstuvwxyz") 
for x in xrange(10)))+".tmp"
    self.save()
  def save(self):
    pickle.dump(deque(self), open(self.tempfilename,'wb'))
    try: os.remove(self.filename)
    except: pass
    os.rename(self.tempfilename, self.filename)
  @classmethod
  def load(cls, filename):
    return pdeque(filename, pickle.load(open(filename,'rb')))

    #todo: change this so that if it's called from an object it loads
    #the data into that object?

def makefunc(func):
  def func2(instance, *args):
    result = func(instance, *args)
    instance.save()
    return result
  return lambda _: func2

for name, func in deque.__dict__.items():
  if (not name.startswith("_")) or name in ('__delitem__', '__setitem__'):
    @makefunc(func)
    def f(): pass
    setattr(pdeque, name, f)







"castironpi" <castironpi at gmail.com> wrote in message 
news:29451c2a-cb0a-43a6-b140-6c16e3cb46ac at c65g2000hsa.googlegroups.com...
> I'd like a persistent deque, such that the instance operations all
> commit atomicly to file system. 




From tdahsu at gmail.com  Wed May 21 11:41:41 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Wed, 21 May 2008 08:41:41 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
Message-ID: <e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>

On May 21, 11:13?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-21, tda... at gmail.com <tda... at gmail.com> wrote:
>
> > I'd appreciate any help. ?I've got a list of files in a directory, and
> > I'd like to iterate through that list and process each one. ?Rather
> > than do that serially, I was thinking I should start five threads and
> > process five files at a time.
>
> > Is this a good idea? ?I picked the number five at random... I was
>
> Depends what you are doing.
> If you are mainly reading/writing files, there is not much to gain, since 1
> process will already push the disk IO system to its limit. If you do a lot of
> processing, then more threads than the number of processors is not much use. If
> you have more 'burtsy' behavior (first do lot of reading, then lot of
> processing, then again reading, etc), then the system may be able to do some
> scheduling and keep both the processors and the file system busy.
>
> I cannot really give you advice on threading, I have never done that. You may
> want to consider an alternative, namely multi-tasking at OS level. If you can
> easily split the files over a number of OS processes (written in Python), you
> can make the Python program really simple, and let the OS handle the
> task-switching between the programs.
>
> Sincerely,
> Albert

Albert,

Thanks for your response - I appreciate your time!

I am mainly reading and writing files, so it seems like it might not
be a good idea.  What if I read the whole file into memory first, and
operate on it there?  They are not large files...

Either way, I'd hope that someone might respond with an example, as
then I could test and see which is faster!

Thanks again.


From stevegill7 at gmail.com  Tue May 13 20:29:59 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 13 May 2008 17:29:59 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<c8790040-f64e-4c83-ba49-72f24f069ad2@f36g2000hsa.googlegroups.com>
Message-ID: <9b4bd2fc-6276-4657-ae73-81eec2ffad61@e39g2000hsf.googlegroups.com>

On May 12, 6:59 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On May 12, 1:54 pm, Jetus <stevegi... at gmail.com> wrote:
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
>
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> 1) Use BeautifulSoup to extract the path:
>
> JCCOGetImage.jsp?refnum=DN2007036179
>
> from the html page.
>
> 2) The path is relative to the current url, so if the current url is:
>
> http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp
>
> Then the url to the page you want is:
>
> http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2...
>
> You can use urlparse.urljoin() to join a relative path to the current
> url:
>
> import urlparse
>
> base_url = 'http://www.landrecords.jcc.ky.gov/records/S3DataLKUP.jsp'
> relative_url = 'JCCOGetImage.jsp?refnum=DN2007036179'
>
> target_url = urlparse.urljoin(base_url, relative_url)
> print target_url
>
> --output:--http://www.landrecords.jcc.ky.gov/records/JCCOGetImage.jsp?refnum=DN2...
>
> 3) Python has a webbrowser module that allows you to open urls in a
> browser:
>
> import webbrowser
>
> webbrowser.open("www.google.com")
>
> You could also use system() or os.startfile()[Windows], to do the same
> thing:
>
> os.system(r'C:\"Program Files"\"Mozilla Firefox"\firefox.exe')
>
> #You don't have to worry about directory names
> #with spaces in them if you use startfile():
> os.startfile(r'C:\Program Files\Mozilla Firefox\firefox.exe')
>
> All the urls you posted give me errors when I try to open them in a
> browser, so you will have to sort out those problems first.

7Stud;
Thanks for sharing your knowledge!!

1)The proper url to the website is http://www.landrecords.jcc.ky.gov/records/S0Search.html.

2) The join won't work. I found that the request it sends is
http://206.196.0.195/cgi-bin/webview/SEND2.PGM?dispfmt=&itype=Q&authorization=&parm2=SDAAAA76070B
It looks like it generates a random code for param2...
I have two choices for generating this javascript,
I can click on the View, or in the form, if I put a "i" in the code
and click on the
option link, it will send me pdf file.

3) Was not sure why you suggested I use the Webbrowser module?
But I am glad to find out about it.


From wojtek.gminick.walczak at gmail.com  Tue May  6 17:33:51 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 23:33:51 +0200
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <2c3c21060805061433u6c2acf7dx47ffdc42e45c75b2@mail.gmail.com>

2008/5/6, Anton Slesarev <slesarev.anton at gmail.com>:
>  But I have some problem with writing performance grep analog.
[...]
>  Python code 3-4 times slower on windows. And as I remember on linux
>  the same situation...
>
>  Buffering in open even increase time.
>
>  Is it possible to increase file reading performance?

The best advice would be not to try to beat grep, but if you really
want to, this is the right place ;)

Here is my code:
$ cat grep.py
import sys

if len(sys.argv) != 3:
   print 'grep.py <pattern> <file>'
   sys.exit(1)

f = open(sys.argv[2],'r')

print ''.join((line for line in f if sys.argv[1] in line)),

$ ls -lh debug.0
-rw-r----- 1 gminick root 4,1M 2008-05-07 00:49 debug.0

---
$ time grep nusia debug.0 |wc -l
26009

real    0m0.042s
user    0m0.020s
sys     0m0.004s
---

---
$ time python grep.py nusia debug.0 |wc -l
26009

real    0m0.077s
user    0m0.044s
sys     0m0.016s
---

---
$ time grep nusia debug.0

real    0m3.163s
user    0m0.016s
sys     0m0.064s
---

---
$ time python grep.py nusia debug.0
[26009 lines here...]
real    0m2.628s
user    0m0.032s
sys     0m0.064s
---

So, printing the results take 2.6 secs for python and 3.1s for original grep.
Suprised? The only reason for this is that we have reduced the number
of write calls in the python example:

$ strace -ooriggrep.log grep nusia debug.0
$ grep write origgrep.log |wc -l
26009


$ strace -opygrep.log python grep.py nusia debug.0
$ grep write pygrep.log |wc -l
12


Wish you luck saving your CPU cycles :)

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From walterbyrd at iname.com  Sun May 11 15:04:37 2008
From: walterbyrd at iname.com (walterbyrd)
Date: Sun, 11 May 2008 12:04:37 -0700 (PDT)
Subject: frameword vs application server?
Message-ID: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>

Can somebody help me understand the difference? Not just where Python
is concerned, but in general?

As I understand it, an application server is supposed to be a great
help in developing apps, because most of the business logic is already
there. It seems to me that, usually when applications servers are
discussed, people are talking about Java.

I suppose most popular Python frameworks incorporate an application
server, but I get the idea that those app servers are not nearly as
sophisticed as something like JBoss.

I am not sure if a Python app server, that works like a Java app
server would make sense.


From inhahe at gmail.com  Fri May 16 12:06:00 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 12:06:00 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
	<b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>
	<695ni3F30u8tgU2@mid.uni-berlin.de>
Message-ID: <5giXj.4881$Kk3.2633@bignews9.bellsouth.net>

I like to learn what I need, but I have done assembly before, I wrote a 
terminal program in assembly for example, with ansi and avatar support.  I'm 
just not fluent in much other than the language itself, per se.

Perhaps C would be as fast as my asm would, but C would not allow me to use 
SIMD, which seems like it would improve my speed a lot, I think my goals are 
pretty much what SIMD was made for.

> I think the right thing to do if you are not as fluent in assembly is do 
> not do anything in it at all. What do you need it for?
>
> Diez 




From castironpi at gmail.com  Tue May 13 05:52:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 02:52:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
Message-ID: <d2586a08-5933-4523-a1f4-7554cc4aad95@t54g2000hsg.googlegroups.com>

On May 13, 4:18?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Dave Parker wrote:
> > On May 12, 7:20?pm, castiro... at gmail.com wrote:
> >>Yes, I am trying to visualize something.
>
> > If it is related to making furniture comfortable for humans, have you
> > considered painting the furniture with thermochromic paint (
> >http://en.wikipedia.org/wiki/Thermochromism)? ?It changes color in
> > response to temperature, which in part is determined by how hard a
> > body is pressed against it because close contact tends to trap heat.
> > An evenly distributed color might indicated evenly distributed
> > pressure.
>
> Don't let yourself be irritated by castironpi - he's the virtual equivalent
> of a mumbling mad man in this group. Ignorance serves best as remedy - and
> getting a filter to work, as I did (so I only see his postings being
> quoted... a huge relief!)
>
> Diez

I hate to ignore work.  Who is the non-virtual equivalent mumble?


From jaywgraves at gmail.com  Thu May 29 17:44:18 2008
From: jaywgraves at gmail.com (jay graves)
Date: Thu, 29 May 2008 14:44:18 -0700 (PDT)
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <97902d02-d2dd-4ff7-b5d3-d2873c3a68c0@e39g2000hsf.googlegroups.com>

On May 29, 4:30 pm, Nikhil <mnik... at gmail.com> wrote:
> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.

Hmmm.  Can you state your problem in a different way?

I find that Python excels at string handling and I've never had to
write a pure character scanner like you are suggesting.  Not to say
that you don't need it, I just think that if you give us a small
example of your data and your expected outcome, it would be easier to
help you.




From turian at gmail.com  Sat May 10 19:09:27 2008
From: turian at gmail.com (Joseph Turian)
Date: Sat, 10 May 2008 16:09:27 -0700 (PDT)
Subject: Find more than one error at once
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
	<68lhqrF2tlavsU1@mid.uni-berlin.de>
Message-ID: <bbfae640-089e-4a2f-9938-a8f6bcde6457@a70g2000hsh.googlegroups.com>

On May 10, 8:13 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> What kind of errors? Syntax-errors? Then use one of the python source
> code analyzers, such as pylint or pychecker.

Great!


From ptmcg at austin.rr.com  Tue May 20 18:16:59 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 15:16:59 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<6102785c-57ef-4bf7-9bd3-394ef6855aa7@z72g2000hsb.googlegroups.com>
Message-ID: <69c5ba92-adc7-4c17-a2b2-fb581e4e776e@c19g2000prf.googlegroups.com>

On May 20, 11:08?am, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > def compress(s):
> > ? ? seen = set()
> > ? ? return ''.join(c for c in s if c not in seen and (seen.add(c) or
> > True))
>
> Slightly nicer is to move the set add out of the conditional...
>
> def compress(s):
> ? ? seen = set()
> ? ? return ''.join(seen.add(c) or c for c in s if c not in seen)
>
> I wouldn't write it this way though :)
>
> --
> Paul Hankin

Thank you, Paul.  I knew I had seen a cleaner version than mine, and I
could not remember how it was done.



-- Paul


From deets at nospam.web.de  Wed May  7 09:36:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 15:36:15 +0200
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
	<bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>
Message-ID: <68dpjdF2rvl8oU1@mid.uni-berlin.de>

Jetus wrote:

> On May 4, 7:22 am, castiro... at gmail.com wrote:
>> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>> wrote:
>>
>> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com>
>> > escribi?:
>>
>> > > Is there a good place to look to see where I can find some code that
>> > > will help me to save webpage's links to the local drive, after I have
>> > > used urllib2 to retrieve the page?
>> > > Many times I have to view these pages when I do not have access to
>> > > the internet.
>>
>> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>>
>> > --
>> > Gabriel Genellina
>>
>> A lot of the functionality is already present.
>>
>> import urllib
>> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
>> from htmllib import HTMLParser
>> from formatter import NullFormatter
>> parser= HTMLParser( NullFormatter( ) )
>> parser.feed( open( 'main.htm' ).read( ) )
>> import urlparse
>> for a in parser.anchorlist:
>>     print urlparse.urljoin( 'http://python.org/', a )
>>
>> Output snipped:
>>
>> ...http://python.org/psf/http://python.org/dev/http://python.org/links/http://python.org/download/releases/2.5.2http://docs.python.org/http://python.org/ftp/python/2.5.2/python-2.5.2.msi
>> ...
> 
> How can I modify or add to the above code, so that the file references
> are saved to specified local directories, AND the saved webpage makes
> reference to the new saved files in the respective directories?
> Thanks for your help in advance.

how about you *try* to do so - and if you have actual problems, you come
back and ask for help? Alternatively, there's always guru.com

Diez


From robert.kern at gmail.com  Fri May 16 19:50:38 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 16 May 2008 18:50:38 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
Message-ID: <g0l6kf$dhk$1@ger.gmane.org>

Marlin Rowley wrote:
> All:
>  
> Say I have an array:
>  
> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])

I'm sorry, you are going to have to be less elliptical. Exactly what do you have 
there? It's certainly not an array, but a tuple of single-element lists each 
containing a single string which can be interpreted as a group of 4 IEEE-754 
single-precision floats. Is this correct? Do you really have single-element 
lists? Some more context would be nice (can the tuple be longer? can the lists 
be longer? can the strings be longer? etc.).

But basically, I would concatenate all of the strings together in the correct 
order and use numpy.fromstring() on the resulting string.

And please, just respond to the list. I read this through GMane, and I don't 
like getting duplicates in my in-box.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From shiningsandy at gmail.com  Mon May 19 05:42:22 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 02:42:22 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
Message-ID: <3a7f52b7-5250-45e6-99cc-cee4ff6073f2@24g2000hsh.googlegroups.com>

On May 19, 1:39 pm, "egl... at gmail.com" <egl... at gmail.com> wrote:
> > but when i run the exe my program in not behaving as
> > it supposed to be.its generating some errors.i dont know why this
> > thing is happening as when i run my script it works fine.can some one
> > put some light here.
>
> There is nothing special in executables produced by py2exe. I mean
> that the debugging strategy is as always. A good start might be in
> adding logging\tracing facilities both to script and the executable.
> Comparing two trace files could give you some clue.

hi here is my code.i wont get any errors when i run this script.it may
not be the best pycode as i am very much new to python development.

import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook2003 application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    for kk in range(len(obj.Items),1,-1):
    #for kk in range(len(obj.Items-1),0,-1):
        #print 'hello'
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        writeData(mailItem,txt_file)

        #print mailItem.OlSaveAsType.olMSG
        #saveCopy(mailItem)
        #print "sender="+mailItem.SenderName+'
SenderEmailId='+str(mailItem.SenderEmailAddress)+'
Time='+str(mailItem.ReceivedTime)
        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)

    txt_file.close()
    '''
    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
    file_zip.write('data.log')
    file_zip.close()
    '''

#function to create a directory
#obviously not a best way :-( but i think can expected this sort of
mistakes from beginners
def createDir():
    path=os.path.abspath("\email")
    if(os.path.exists(path)):
        print "Directory already exists"
    else:
        os.system("md "+path)

#function to save a copy of email
def writeData(mailItem,file):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    getAttachmentInfo(mailItem.Attachments)
    file.write(getHTMLString(dataToWrite))
    #checkStringType(dataToWrite)

def getAttachmentInfo(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        #print "File Name="+atmt.FileName+'
DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
        abc=os.path.isdir(os.getcwd()+'\email')

        if(abc==True):
            print 'directory exists'

        else:
            os.mkdir(os.getcwd()+'\email')

        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)



# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):

    if isinstance(a,str):
       b='not a unicode string'

    else:
        a.encode('utf-8')
        #print 'unicode type'

    return a

#function to save the coopy of an email
#:-( but smhow it generate error whenever i make a call to it
def saveCopy(mailItem):

    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
    print name
    #global outlook_app
    try:
        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
    except BaseException:
        print BaseException

def getHTMLString(b):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+b+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    #print outlook_app.OlSaveAsType.olMSG
    print '=================='
    print dir(outlook_app)
    print '=================='
    inbox_obj=getOutLookFolders(outlook_app)
    print dir(inbox_obj)
    print (inbox_obj.Items)
    #saveCopy(inbox_obj.Items[1])
    getMailContent(inbox_obj)



main()


From python at bdurham.com  Thu May  1 08:30:51 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 01 May 2008 08:30:51 -0400
Subject: Best way to store config or preferences in a multi-platform way.
Message-ID: <1209645051.19782.1250872121@webmail.messagingengine.com>

Lance,

> I am still undecided if the ability for the user to edit the file independently of the program is a good or bad thing.

I prefer user viewable plain (non-XML) text files because:

- easy to make a change in case of emergency
- easy to visually review and search
- easy to version control, diff, and optionally spellcheck
- easy to translate
- easy to generate programmatically
- less opportunity for corruption
- best compression

IMO, the 3 biggest advantages are:
- easy to make field changes in case of emergency
- diff
- less opportunity for corruption

Interesting thread. I'm looking forward to hearing what others say on
this topic.

Regards,
Malcolm


From _karlo_ at _mosor.net_  Wed May 21 19:33:33 2008
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Wed, 21 May 2008 23:33:33 +0000 (UTC)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
Message-ID: <Xns9AA6FDC59536mosornet@161.53.160.65>

Andr? <andre.roberge at gmail.com> wrote in
news:a9913f2d-0c1a-4492-bf58-5c78813c4458 at s50g2000hsb.googlegroups.com: 

> How about something like the following (untested)
> 
> done = False
> while not done:
>   try:
>      some_function()
>      done = True
>   except:
>      some_function2()
>      some_function3()

Sure, that works, but I was aiming for something more elegant and Pythonic 
;).


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From castironpi at gmail.com  Thu May 15 19:43:44 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:43:44 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>
Message-ID: <5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>

On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
>
>
>
>
> <bruno.desthuilli... at gmail.com> wrote:
> > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > Why can't I write this?
> > > > > --
>
> > > > Because your antecedent is undefined?
>
> > > Of the two ways to play, just to say #define this per se would be a
> > > bad move, but that's one that comes from the wrong group. ?#define is
> > > a big scary macro, that python hasn't been using; it's the one-line
> > > typo. ?Instance:
>
> > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > Use it to render planes in solids.
>
> > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > definitively.- Hide quoted text -
>
> > - Show quoted text -
>
> Definitely. ?But, due, I forgot to complete an example.
>
> > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> in C. ?Python:
>
> life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> exec( life1 )
>
> Where does it go?- Hide quoted text -
>
> - Show quoted text -

I'm supposed to talk about an entropy pool game.  You can tunnel.


From rcdailey at gmail.com  Fri May 30 21:50:13 2008
From: rcdailey at gmail.com (Robert Dailey)
Date: Fri, 30 May 2008 20:50:13 -0500
Subject: Continuous Timer
Message-ID: <496954360805301850u4ce63746vc8fcc84ad1b72824@mail.gmail.com>

Hi,

Reading through the Python 2.5 docs, I'm seeing a Timer class in the
threading module, however I cannot find a timer object that will
continuously call a function of my choice every XXXX amount of milliseconds.
For example, every 1000 milliseconds I want a function named Foo to be
called. This would continue to happen until I terminate the timer in my main
thread. Thanks for the help.
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From castironpi at gmail.com  Mon May  5 13:28:53 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 10:28:53 -0700 (PDT)
Subject: STL multimap
Message-ID: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>

Is multimap just a syntax-checked dictionary of mutable sequences?

Is def( a ): a[:]= [x] a trick or part of the language?  It looks
pretty sharp in variable-width.


From heikki at osafoundation.org  Tue May  6 00:06:31 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Mon, 05 May 2008 21:06:31 -0700
Subject: SSL through python. possible ?
In-Reply-To: <715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
	<6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>
	<715b8048-8b88-44cd-a40a-722650125f19@e53g2000hsa.googlegroups.com>
Message-ID: <1-ydnQVfb6vaRILVnZ2dnUVZ_oadnZ2d@comcast.com>

TkNeo wrote:
> ok i have tried around a lot but no luck. I think M2Crypto is my best
> option except it requires a minimum of python 2.4 which i don't have.

M2Crypto requires Python 2.3. There are optional features that require
newer Python. If you run into anything else (=bugs) that does not work
with 2.3, let me know and I'll fix it.

-- 
  Heikki Toivonen


From martin at v.loewis.de  Mon May 12 13:32:09 2008
From: martin at v.loewis.de (=?windows-1252?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 19:32:09 +0200
Subject: Compiling Python using Microsoft Visual C++ 2008
In-Reply-To: <g09m9n$c8h$1@theodyn.ncf.ca>
References: <g09jsd$b2c$1@theodyn.ncf.ca>
	<482855df$0$14196$9b622d9e@news.freenet.de>
	<g09m9n$c8h$1@theodyn.ncf.ca>
Message-ID: <48287f19$0$14201$9b622d9e@news.freenet.de>

>> See PCbuild/readme.txt.
> 
> I presume that this is PCbuild8.txt

As Christian says: PCbuild/readme.txt are the correct instructions
(and had been since Python 2.0 or so).

> Now, I would like to remove Python 2.5 from VS 2008 but see no obvious
> way of getting rid of it.

You might be able to clear the most-recent-projects list in the registry
somehow, but I personally wouldn't worry - if you open other projects,
this one will scroll off the list eventually.

Regards,
Martin


From ndbecker2 at gmail.com  Wed May 21 11:46:33 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 21 May 2008 11:46:33 -0400
Subject: [ctypes] convert pointer to string?
Message-ID: <g11g4p$476$1@ger.gmane.org>

In an earlier post, I was interested in passing a pointer to a structure to
fcntl.ioctl.

This works:

c = create_string_buffer (...)
args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
err = fcntl.ioctl(eos_fd, request, args)

Now to do the same with ctypes, I have one problem.

class eos_dl_args_t (Structure):
    _fields_ = [("length", c_ulong),
                ("data", c_void_p)]
...
args = eos_dl_args_t()
args_p = cast(pointer(args), c_void_ptr).value
fcntl.ioctl(fd, request, args_p)  <<< May fail here

That last may fail, because .value creates a long int, and ioctl needs a
string.

How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
0-terminate string, because the structure may contain '0' values.



From ptmcg at austin.rr.com  Sun May 25 12:32:39 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 25 May 2008 09:32:39 -0700 (PDT)
Subject: raising an exception when multiple inheritance involves same 
	baseThank
References: mailman.1567.1211722656.12834.python-list@python.org
Message-ID: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>

On May 25, 8:37?am, Michael Hines <michael.hi... at yale.edu> wrote:
> Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
> not multiple inheritance per se I prohibit but only multiple inheritance
> involving more than one HocObject class, I replaced your len(bases) > 1
> test with
> <code>
> ? ? m = False
> ? ? for b in bases :
> ? ? ? if hasattr(b, '__mro__'):
> ? ? ? ? for bb in b.__mro__ :
> ? ? ? ? ? if bb == MetaHocObject.ho :
> ? ? ? ? ? ? if m == True:
> ? ? ? ? ? ? ? raise Exception("Inheritance of multiple HocObject not
> allowed")
> ? ? ? ? ? ? m = True
>
> </code>
> to get
>
> class A(HocObject): pass
>
> class B(object): pass
>
> class C(): pass
>
> class D(C, B, HocObject): pass # ok
>
> class D(C, A, HocObject): pass # fail
>
> When I fold this idea into my code I may even try to eliminate the class
> factory aspect of
> class Foo(hclass(h.Vector))
> in favor of
> class Foo(h.Vector)
>
> Thanks again,
> Michael

Here's a more general version of your testing code, to detect *any*
diamond multiple inheritance (using your sample classes).

-- Paul


for cls in (A,B,C,D):
    seen = set()
    try:
        bases = cls.__bases__
        for b in bases:
            if hasattr(b,"__mro__"):
                for m in b.__mro__:
                    if m in seen:
                        raise Exception("diamond multiple
inheritance")
                    seen.add(m)
    except Exception, e:
        print cls,"has diamond MI"
    else:
        print cls,"is ok"


From dsc at ecs.soton.ac.uk  Wed May 28 11:29:11 2008
From: dsc at ecs.soton.ac.uk (Dave Challis)
Date: Wed, 28 May 2008 16:29:11 +0100
Subject: Any way to loop through object variables?
Message-ID: <483D7A47.3030606@ecs.soton.ac.uk>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,
Just wondering if there's a way to iterate through all variables which
an object has set?

Specifically, I'm using the OptionParser module, which returns an
options object, containing all command line options as object variables.
 I'd like to iterate over these rather than getting at them by name.

Cheers,
Dave
- --
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                            __/|_
 ><>                                       / o   \/|
      Dave Challis           )><>          \_____/\|
____dsc at ecs.soton.ac.uk______(____________________________________________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFIPXpHv26GZvAVVFERAmkaAKDUJuGk8L2nJf8B9b1RaMYpVr9bCwCaAubM
TWdK4AmzAgpKNQxZK3AOB4Q=
=6STh
-----END PGP SIGNATURE-----


From skunkwerk at gmail.com  Sun May 11 12:16:25 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Sun, 11 May 2008 09:16:25 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
Message-ID: <07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>

On May 10, 1:31?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> declaimed the following in comp.lang.python:
>
> ? ? ? ? Coming in late...
>
> > On May 9, 12:12?am, John Nagle <na... at animats.com> wrote:
> > >skunkwerkwrote:
> > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > new requests are inserted, like so:
>
> ? ? ? ? <snip>
>
>
>
> > > > queue = Queue.Queue(0)
> > > > ?WORKERS=100
> > > > for i in range(WORKERS):
> > > > ? ?thread = SDBThread(queue)
> > > > ? ?thread.setDaemon(True)
> > > > ? ?thread.start()
>
> > > > the thread:
>
> > > > class SimpleDBThread ( threading.Thread ):
> > > > ? ?def __init__ ( self, queue ):
> > > > ? ? ? ? ? ?self.__queue = queue
>
> ? ? ? ? Note: double-leading __ means "name mangling" -- typically only
> needed when doing multiple layers of inheritance where different parents
> have similar named items that need to be kept independent; a single _ is
> the convention for "don't touch me unless you know what you are doing"
>
> > > > ? ? ? ? ? ?threading.Thread.__init__ ( self )
> > > > ? ?def run ( self ):
> > > > ? ? ? ? ? ?while 1:
> > > > ? ? ? ? ? ? ? ? ? ?item = self.__queue.get()
> > > > ? ? ? ? ? ? ? ? ? ?if item!=None:
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?model = domain.get_item(item[0])
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug('sdbthread item:'+item[0])
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?title = model['title']
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?scraped = model['scraped']
> > > > ? ? ? ? ? ? ? ? ? ? ? ? ? ?logger.debug("sdbthread title:"+title)
>
> > > > any suggestions?
> > > > thanks
>
> ? ? ? ? <snip>
>
> > thanks John, Gabriel,
> > ? here's the 'put' side of the requests:
>
> > def prepSDBSearch(results):
> > ? ?modelList = [0]
> > ? ?counter=1
> > ? ?for result in results:
> > ? ? ? ? ? ?data = [result.item, counter, modelList]
> > ? ? ? ? ? ?queue.put(data)
> > ? ? ? ? ? ?counter+=1
> > ? ?while modelList[0] < len(results):
> > ? ? ? ? ? ?print 'waiting...'#wait for them to come home
> > ? ?modelList.pop(0)#now remove '0'
> > ? ?return modelList
>
> ? ? ? ? My suggestion, if you really want diagnostic help -- follow the
> common recommendation of posting the minimal /runable (if erroneous)/
> code... If "domain.get_item()" is some sort of RDBM access, you might
> fake it using a pre-loaded dictionary -- anything that allows it to
> return something when given the key value.
>
> > responses to your follow ups:
> > 1) ?'item' in thethreadsis a list that corresponds to the 'data'
> > list in the above function. ?it's not global, and the initial values
> > seem ok, but i'm not sure if every time i pass in data to the queue it
> > passes in the same memory address or declares a new 'data' list (which
> > I guess is what I want)
>
> ? ? ? ? Rather confusing usage... In your "put" you have a list whose first
> element is "result.item", but then in the work thread, you refer to the
> entire list as "item"
>
> > 3) ?the first item in the modelList is a counter that keeps track of
> > the number ofthreadsfor this call that have completed - is there any
> > better way of doing this?
>
> ? ? ? ? Where? None of your posted code shows either "counter" or modelList
> being used by thethreads.
>
> ? ? ? ? And yes, if you havethreadstrying to update a shared mutable, you
> have a race condition.
>
> ? ? ? ? You also have a problem if you are using "counter" to define where
> in modelList a thread is supposed to store its results -- as you can not
> access an element that doesn't already exist...
>
> a = [0]
> a[3] = 1 ? ? ? ?#failure, need to create elements 1, 2, 3 first
>
> ? ? ? ? Now, if position is irrelevant, and a thread just appends its
> results to modelList, then you don't need some counter, all you need is
> to check the length of modelList against the count expected.
>
> ? ? ? ? Overall -- even though you are passing things via the queue, the
> contents being pass via the queue are being treated as if they were
> global entities (you could make modelList a global, remove it from the
> queue entries, and have the same net access)...
>
> ? ? ? ? IOWs, you have too much coupling between thethreadsand the feed
> routine...
>
> ? ? ? ? As for me... I'd be using a second queue for return values...
>
> WORKERTHREADS = 100
> feed = Queue.Queue()
> result = Queue.Queue()
>
> def worker():
> ? ? ? ? while True:
> ? ? ? ? ? ? ? ? (ID, item) = feed.get() ? ? ? ? ? ? ? ? #I leave the queues globals
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #since they perform locking
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #internally
> ? ? ? ? ? ? ? ? model = domain.get_item(item)
> ? ? ? ? ? ? ? ? results.put( (ID, model["title"], model["scraped"]) )
>
> for i in range(WORKERTHREADS):
> ? ? ? ? aThread = threading.Thread(target=worker)
> ? ? ? ? ? ? ? ? #overkill to subclass as there is now no specialized init
> ? ? ? ? ? ? ? ? #and if I really wanted to make the queues non-global
> ? ? ? ? ? ? ? ? #I'd pass them as arguments:
> ? ? ? ? ? ? ? ? # ? ? ? threading.Thread(target=worker, args=(feed, results))
> ? ? ? ? ? ? ? ? #where worker is now
> ? ? ? ? ? ? ? ? # ? ? ? def worker(feed, results):
> ? ? ? ? aThread.setDaemon(True)
> ? ? ? ? aThread.start()
>
> ...
>
> def prepSearch(searches):
> ? ? ? ? modelList = []
> ? ? ? ? counter = 0
> ? ? ? ? for searchItem in searches:
> ? ? ? ? ? ? ? ? feed.put( (counter, searchItem) )
> ? ? ? ? ? ? ? ? counter += 1
> ? ? ? ? ? ? ? ? modelList.append(None) ?#extend list one element per search
> ? ? ? ? while counter:
> ? ? ? ? ? ? ? ? (ID, title, scraped) = results.get()
> ? ? ? ? ? ? ? ? modelList[ID] = (title, scraped)
> ? ? ? ? ? ? ? ? counter -= 1
> ? ? ? ? return modelList
>
> ? ? ? ? The only place counter and modelList are modified are within the
> prepSearch. I'm passing counter out and back to use as an ID value if
> the final results are supposed to be in order -- that way if one thread
> finishes before another, the items can be placed into the list where
> they'd have been sequentially.
>
> ? ? ? ? I can only hope that "domain.get_item" is an activity that is I/O
> bound AND that it supports parallel accesses... Otherwise the above
> workerthreadsseem to be adding a lot of overhead for queue I/O and
> threading swaps for what is otherwise a rather linear process.
>
> ? ? ? ? Perhaps your posts don't reveal enough... Maybe you have multiple
> mainthreadsthat are posting to the worker feed queue (and you were
> using separate mutables for storing the results). In this situation, I'd
> remove the results queue from being a global entity, create one queue
> per main processing thread, and pass the queue as one of the parameters.
> This way, a worker can return data to any source thread by using the
> supplied queue for the return...
>
> Modify prepSearch with:
>
> ? ? ? ? myQueue = Queue.Queue()
> ...
> ? ? ? ? feed.put( (counter, searchItem, myQueue) )
> ...
> ? ? ? ? (ID, title, scraped) = myQueue.get()
>
> Modify worker with:
>
> ? ? ? ? (ID, item, retqueue) = feed.get()
> ...
> ? ? ? ? retqueue.put( (ID, model["title"], model["scraped"]) )
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ? wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

wow.  thanks for the help.
   i seem to have fixed my problem though - it turns out
domain.get_item was not thread safe as it was using the underlying
httplib.  the solution was to create a new connection to the database
for each thread (which is ok as the database is meant to be queried in
a massively paralell fashion).  the missing part of the code included
a part where i inserted the results at the given position into the
list.

the only issue i have now is that it takes a long time for 100 threads
to initialize that connection (>5 minutes) - and as i'm doing this on
a webserver any time i update the code i have to restart all those
threads, which i'm doing right now in a for loop.  is there any way I
can keep the thread stuff separate from the rest of the code for this
file, yet allow access?  It wouldn't help having a .pyc or using
psycho, correct, as the time is being spent in the runtime?  something
along the lines of 'start a new thread every minute until you get to a
100' without blocking the execution of the rest of the code in that
file?  or maybe any time i need to do a search, start a new thread if
the #threads is <100?

thanks again


From sn at sncs.se  Tue May 27 07:14:30 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 04:14:30 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
	<31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com>
Message-ID: <0e67df2c-43c1-4b1f-8220-52556a316595@79g2000hsk.googlegroups.com>

I had bothered. Volunterly that is too. Becausa I care.

Should we piss of about py3k? It's a debate.

Guiod wrote also something he got from Ruby: "Open source need to
change or die"

If I recall correctly. I cant get too bothered for I get tired too.

But change is not == progress.

Sometimes it is like in the 70s here when we had even worse economy
"Well, at least it gives some work opportunities"

Think about it. It is Less work that is the ideal, the thing to strive
for
Not More work - it may look to give more money but it is really not
economic

So is it this the way ? No ? It ain't broken so lets brake it

S


On May 27, 10:15 am, alex23 <wuwe... at gmail.com> wrote:
> On May 27, 5:47 pm, Sverker Nilsson <s... at sncs.se> wrote:
>
> > Dont make they functions. Or is this just to throw us out?
>
> Have you even bothered to read the reasoning for this change since the
> last time you got your knickers twisted over it?
>
> http://www.python.org/dev/peps/pep-3105/#rationale
>
> I don't see "piss everyone off" listed there anywhere.
>
> Personally, I believe if you're writing code of any serious length,
> you generally shouldn't be using 'print' anyway, using the logging
> module allows for a lot more flexibility.
>
> If you're bothered by having to type the parentheses while in the
> interpreter, try using IPython with it's autocall mode turned on.



From paul at floorball-flamingos.nl  Wed May  7 13:30:12 2008
From: paul at floorball-flamingos.nl (Paul Melis)
Date: Wed, 07 May 2008 19:30:12 +0200
Subject: letter frequency counter / your thoughts..
In-Reply-To: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <4821e745$0$24414$5fc3050@news.tiscali.nl>

umpsumps at gmail.com wrote:
> Here is my code for a letter frequency counter.  It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..

Not bad for a beginner I think :)

> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res
> 
> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1
> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]
> 
> thanks much!!

Slightly shorter:

def mostfreq(strng):
     dic = {}
     for letter in strng:
         if letter not in dic:
             dic[letter] = 0
         dic[letter] += 1
     # Swap letter, count here as we want to sort on count first
     getvals = [(pair[1],pair[0]) for pair in dic.iteritems()]
     getvals.sort()
     return getvals[-3:]

I'm not sure if  you wanted the function mostfreq to return the 3 most 
frequent letters of the first 3 letters? It seems to do the latter. The 
code above uses the former, i.e. letters with highest frequency.

Paul


From semanticist at gmail.com  Wed May  7 20:53:06 2008
From: semanticist at gmail.com (Miles)
Date: Wed, 7 May 2008 20:53:06 -0400
Subject: class definition
In-Reply-To: <K5rUj.249337$pM4.157639@pd7urf1no>
References: <K5rUj.249337$pM4.157639@pd7urf1no>
Message-ID: <a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4@mail.gmail.com>

On Wed, May 7, 2008 at 7:40 PM, Yves Dorfsman <yves at zioup.com> wrote:
> Does it make a difference if you put subclass object or not ?
>
>  What is the difference between c1 and c2 here:
>
>  class c1:
>   pass
>
>  class c2(object):
>   pass

>>> type(c1)
<type 'classobj'>
>>> type(c1())
<type 'instance'>
>>> type(c2)
<type 'type'>
>>> type(c2())
<class '__main__.c2'>

In Python 2.2, classes and types were unified.  If a class inherits
from object (or any other built-in), it is considered a "new-style"
class; otherwise, it is an old-style (or classic) class.  There are
some differences in their behavior; most notably, descriptors
(computer properties) will not work with old-style classes.  Old-style
classes will go away in Python 3 (I think), and all classes will have
object as a base.

An introduction to new-style classes:
http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html
A guide to descriptors:
http://users.rcn.com/python/download/Descriptor.htm
The reference manual on the distinction:
http://docs.python.org/ref/node33.html
The technical explanation:
http://www.python.org/download/releases/2.2.3/descrintro/

-Miles


From tinnews at isbd.co.uk  Sun May 25 10:24:55 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 25 May 2008 14:24:55 GMT
Subject: Python database 'frontends', what's available?
References: <4837141b$0$658$bed64819@news.gradwell.net>
	<08424ab8-e5c4-4aca-a492-1410e56f38a2@y38g2000hsy.googlegroups.com>
Message-ID: <483976b7$0$658$bed64819@news.gradwell.net>

Mike Driscoll <kyosohma at gmail.com> wrote:
> On May 23, 1:59?pm, tinn... at isbd.co.uk wrote:
> > I'm desperately trying to move a Microsoft Access database application
> > (a simple accounts system I wrote myself) to Linux. ?Python is one of
> > my preferred programming laguages so I wonder if there are any good
> > Python 'frameworks' for writing database applications, in particular I
> > need good reporting and forms writing facilities. ?The basic database
> > and logic/arithmetic seem fairly simple to me.
> >
> > --
> > Chris Green
> 
> You might take a look at Dabo. It's made for databases and is pretty
> cool.
> 
> http://dabodev.com/
> 
> Not sure what else is out there.
> 
Dabo looks very interesting, thank you!

-- 
Chris Green


From gnewsg at gmail.com  Sat May  3 13:27:12 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sat, 3 May 2008 10:27:12 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
	<roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <81e98a78-bc50-4800-981d-908bf14305bb@z72g2000hsb.googlegroups.com>

On 3 Mag, 05:38, Roy Smith <r... at panix.com> wrote:

> In the application I work on, we've avoided this. ?We just listen on two
> separate sockets (one for each address family). ?We wrote a DualSocket
> class which manages the two underlying single-protocol sockets and makes
> them appear to be a single dual-protocol socket. ?It was a lot of user code
> to write, compared with using the mapped address mechanism, but at least
> it's portable to every OS we've seen that support IPv6.
>
> You don't need multi-threading to handle multiple sockets. ?In our
> implementation, for example, we use select() in a single thread to
> multiplex the two.

I would be very interested in taking a look at how you implemented
that part of code. Would it be possible?
For now I wrote this and it seems to work just fine.
Any advice about it?



class FTPServer(asyncore.dispatcher):

    def __init__(self, address, handler):
        """Initiate the FTP server opening listening on address.

         - (tuple) address: the ip:port pair on which to listen
            for ftp data connections.
         - (classobj) handler: the handler class to use.
        """
        asyncore.dispatcher.__init__(self)
        self.handler = handler
        host, port = address
        for res in socket.getaddrinfo(host, port, 0,
socket.SOCK_STREAM):
            af, socktype, proto, canonname, sa = res
            try:
                self.create_socket(af, socket.SOCK_STREAM)
            except socket.error, msg:
                if self.socket:
                    self.socket.close()
                self.socket = None
                continue
            break
        if not self.socket:
            raise socket.error, msg
        self.address_family = af

        if os.name not in ('nt', 'ce'):
            self.set_reuse_addr()
        self.bind(address)
        self.listen(5)

    def handle_accept(self):
        sock_obj, addr = self.accept()
        log("[]%s:%s Connected." %addr[0:2])
        handler = self.handler(sock_obj, self)


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From martin at v.loewis.de  Mon May 12 14:05:17 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 20:05:17 +0200
Subject: Cannot run Python 3.0a5 )-:
In-Reply-To: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
References: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
Message-ID: <482886dd$0$1500$9b622d9e@news.freenet.de>

> Hi, I just tried to install Python 3.0a5 an another Windows PC. I did
> what I have done yesterday at home:
> 
> 1. Downloaded the daily snapshot http://svn.python.org/snapshots/msi/python-3.0.14011.msi
> 2. Installed to C:\Python30
> 3. Added C:\Python30 to the Path environment for all users.
> 
> when I run python from the command line, it says: The system cannot
> execute the specified program.
> 
> I don't understand this.

What happens if you invoke the full command line path?
Can you check the event log for messages?
What operating system are you using?

Regards,
Martin


From miki.tebeka at gmail.com  Wed May  7 19:54:13 2008
From: miki.tebeka at gmail.com (Miki)
Date: Wed, 7 May 2008 16:54:13 -0700 (PDT)
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <ad2861dc-d9fd-4ad4-aa3d-1e401e581cab@b9g2000prh.googlegroups.com>

Hello,

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
> ? ?# How do I do the following line?
> ? ?if key not in second_dict or if it is, but has has the wrong value,
> then let me know
def cmp_dicts(first, second):
    return sorted(first.iteritems()) == \
           sorted(((k[1], v) for k, v in second.iteritems()))

Google for DSU (Decorate-Sort-Undecorate)

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com




From bj_666 at gmx.net  Thu May  8 23:54:44 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 May 2008 03:54:44 GMT
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
Message-ID: <68i084F2su97jU4@mid.uni-berlin.de>

On Thu, 08 May 2008 23:35:04 +0200, Hrvoje Niksic wrote:

> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
> 
>> On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>>
>>> The thing is, I'm not using slots by choice.  I'm using the standard
>>> lib "socket" class, which apparently uses slots.
>>
>> `socket` objects can't be pickled.  Not just because of the
>> `__slot__`\s but because a substantial part of their state lives in
>> the operating system's space.
> 
> Of course, if it makes sense to pickle sockets in the application, one
> is can do so by defining __getstate__ and __setstate__:

When does it make sense!?

> class Connection(object):
>     def __init__(self, host, port):
>         self.host = host
>         self.port = port
>         self.init_sock()
> 
>     def init_sock(self):
>         self.sock = socket.socket()
>         self.sock.connect((host, port))
>         ... init communication ...

But if you unpickle it while the original connection is still open it
can't connect.  If it's not open anymore, there's no one answering at
host/port anymore or some program that has no idea what this connection
is all about.

Ciao,
	Marc 'BlackJack' Rintsch


From castironpi at gmail.com  Tue May  6 10:55:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 07:55:58 -0700 (PDT)
Subject: parameters to lambda's executed at run time.
References: <a96dd594-3214-4a97-a5dd-d3e66f647e26@a70g2000hsh.googlegroups.com>
	<68apjeF2r9b93U2@mid.uni-berlin.de>
Message-ID: <71f26e73-80e6-4471-9d84-1b58035e2a9d@f36g2000hsa.googlegroups.com>

On May 6, 5:17?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> wyleu wrote:
> > I'm trying to supply parameters to a function that is called at a
> > later time as in the code below:
>
> > llist = []
>
> > for item in range(5):
> > ? ? llist.append(lambda: func(item))
>
> > def func(item):
> > ? ? print item
>
> > for thing in llist:
> > ? ? thing()
>
> > which produces the result
>
> > IDLE 1.2.1
> >>>> ================================ RESTART
> >>>> ================================
>
> > <function <lambda> at 0xb716356c>
> > <function <lambda> at 0xb71635a4>
> > <function <lambda> at 0xb71635dc>
> > <function <lambda> at 0xb7163614>
> > <function <lambda> at 0xb716364c>
> >>>> ================================ RESTART
> >>>> ================================
>
> > 4
> > 4
> > 4
> > 4
> > 4
>
> > How can one allocate a different parameter to each instance of the
> > function rather than all of them getting the final value of the loop?
>
> That's a FAQ. Python creates a closure for you that will retain the last
> value bound. To prevent that, you need to create a named paramter like
> this:
>
> lambda item=item: func(item)
>
> That will bind the current item value at the lambda creation time.
>
> Diez- Hide quoted text -
>
> - Show quoted text -

I am getting lambda creation-time bindings on 2.5.

>>> g= [ lambda h= i: h for i in range( 10 ) ]
>>> [ e( ) for e in g ]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

>>> g= [ lambda: i for i in range( 10 ) ]
>>> [ e( ) for e in g ]
[9, 9, 9, 9, 9, 9, 9, 9, 9, 9]


From jacob at cd.chalmers.se  Sun May 18 07:38:43 2008
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Sun, 18 May 2008 11:38:43 +0000 (UTC)
Subject: Psyco alternative
References: <mailman.2463.1206629079.9267.python-list@python.org>
	<a03264a0-a11f-49d9-96c6-b56a82c0348c@56g2000hsm.googlegroups.com>
Message-ID: <g0p4g3$l5k$1@gide.ita.chalmers.se>

In article <a03264a0-a11f-49d9-96c6-b56a82c0348c at 56g2000hsm.googlegroups.com>,
sturlamolden  <sturlamolden at yahoo.no> wrote:
>On Mar 27, 4:44 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
>> PyPy is self-hosted and has been for some time (a year or so?).
>
>This is technically not correct. PyPy is hosted by RPython, which is
>not Python but a different language all together.

This is pure FUD! PyPy is written in RPython, which is a pure subset of Python,
designed for writing interpreters in such a way that they can be translated into
source code for a static language and then compiled to machine code.

The translation toolchain, written in Python is used to create a binary image,
which is a full interpreter for the Python language. This binary image can
run the toolchain to generate another, identical binary image, which of course
also is a a full interpreter for the Python language.

This makes PyPy self hosting in every sense of the word.

The fact that the interpreter is written in RPython and actually runs as an interpreted
program under CPyton or a compiled PyPy is a useful implementation detail, adding
yet another aspect of self hosting that is not present in other systems that claim
to be self hosting.

PyPy btw, is alive and well. Work is progressing along 3 major fronts. One is supporting
real world applications, where we recently added support for ctypes and where we
are working on ensuring that a number of popular modules and frameworks run under PyPy.
Another major undertaking has been to improve execution speed without the JIT. We can
report that we are faster than CPython on some benchmarks, while slower on others. On the
average, I'd say that we still have some catching up to do. The third avenue that
is being pursued is the JIT. While a huge refactoring has been finished and the
results look very good, there are still many months of work to do before the
JIT can be used in production.

Jacob Hall??n

-- 


From gherron at islandtraining.com  Sun May 11 16:38:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 11 May 2008 13:38:45 -0700
Subject: File Creation Not Working In A Thread Class?
In-Reply-To: <HNHVj.32518$KJ1.10846@newsfe19.lga>
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>	<m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <48275955.4000106@islandtraining.com>

bc90021 wrote:
>> ...and the exact error message was?
>>
>> Here is a tip: if you want people to help you, then you have to help
>> them to help you.  Personally, I wouldn't respond to anymore of your
>> questions because you seem incapable of posting the information that was
>> requested.
>>     
>
> So far, the people who have answered this post have gone on the 
> assumption that I'm stupid.  I'm not.  I took perfectly working code, 
> cut it from one class, and put it in another.  It stopped working in the 
> second class.  I've spent days on this and trust me, given what I've 
> experienced of the Python community so far, if I didn't have to ask, I 
> wouldn't.
>
> (I really must say that so far the help I am getting in the Python 
> community is a big let down.  Whether it's on IRC or here, everyone has 
> an arrogance that I don't find anywhere else in the open source 
> community, and it seriously makes me question the choice of language that 
> I've made.)
>   

Sorry, the arrogance is yours. 

    Expecting us to help with only partial information.

    Expecting us to help when your posts of the error message changes 
from one post to the next.

    Expecting us to help when you refuse to post the traceback.

    Expecting us to believe that it has anything to do with threads.  
(No one believes that for a moment.)


While acknowledging that any piece of code may have bugs, Python's 
threading included, the problem here looks to be some simple mistake in 
the computation of the name of the file to be opened.   Then I look at 
the convoluted quoting surrounding your computation of the file name, 
and my confidence in that as an explanation sky-rockets.  Then someone 
in another post has found an extra set of quotes embedded in your 
filename you compute, and it's clear that we are on the right track.



> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From martin at v.loewis.de  Sat May  3 04:16:50 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 03 May 2008 10:16:50 +0200
Subject: IPv6 and Python
In-Reply-To: <80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
Message-ID: <481c1f73$0$18423$9b622d9e@news.freenet.de>

> Thanks a lot. I've been able to listen on ::1:21 after having
> installed IPv6 on both Windows and Linux thanks to your suggestions.
> I'd like to ask one more question: is it possible to bind my server on
> both IPv4 and IPv6 addresses (note: I do not use multiple threads or
> processes)?

You can, of course, open two sockets, and bind one for IPv4 and one for
IPv6. If you then want to use a single thread only, you need to use
poll/select, which will return when there is an incoming connection on
either socket. You then accept() the new connection for the respective
listen socket.

There is a notion of "mapped" IPv4 addresses, which allows to have a
single IPv6 server socket accept both IPv4 and IPv6 connections.
How this precisely works depends on the operating system.

On Linux, "mapped" addresses are the default. Open a v6 socket, and
connect to it through a v4 client, and it will just work. For this,
you need to specify the "any" server address, i.e.

py> s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
py> s.bind(('', 1234))
py> s.listen(100)
py> s.accept()
(<socket._socketobject object at 0xb7d90304>, ('::ffff:77.132.228.129',
43491, 0, 0))
py> s.accept()
(<socket._socketobject object at 0xb7d90bc4>, ('2001:6f8:900:a85::2',
40800, 0, 0))

The first connection was from a v4 client; the second connection from
a v6 client. To *disable* mapped addresses, you need to set the
IPV6_V6ONLY socket option to 1.

On Windows XP (including SP2), mapped addresses are not supported.

On Windows Vista, mapped addresses are supported, but you have
to explicitly *enable* a socket for mapped use, by setting
the IPV6_V6ONLY option to 0.

So in short, you should always set the IPV6_V6ONLY to 0, as the
system defaults vary. If that option is not defined in the socket
module, the system does not support mapped sockets.

Unfortunately, there is an exception to the last rule: on Vista,
the option is supported, but Python won't magically know what the
option numeric value is. So on Windows, you need to define
IPV6_V6ONLY yourself (the value is 27), and check whether the
setsockopt call succeeds.

Regards,
Martin


From dickinsm at gmail.com  Mon May 12 12:38:06 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Mon, 12 May 2008 09:38:06 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
	<caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>
Message-ID: <4f10b3e8-065b-4592-9b62-7678bcafb137@27g2000hsf.googlegroups.com>

On May 12, 11:15?am, Arnaud Delobelle <arno... at googlemail.com> wrote:

> But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
> which is not the x=0 axis (I think at least - it seems easy to prove
> that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
> f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).

Agreed.  And this makes an excellent argument that if you're going to
choose a number for 0.0**0.0 then it's got to be 1.  But I still don't
find it completely convincing as an argument that 0.0**0.0 should be
defined at all.

> This should cover most practical uses?

Maybe.  But if you're evaluating x**y in a situation where x and y
represent physical quantities, or otherwise have some degree of error,
then you probably want to be warned if x and y both turn out to be
zero.


I seem to be digging myself into a hole here.  I'm personally
firmly in the "0**0 should be 1" camp, and always have been---
there are just too many practical benefits to defining 0**0==1
to ignore, and in the case where you're interested in integer
exponents anything else is just plain wrong. The lack of
continuity of the power function at (0,0) seems a small
price to pay.

Mark


From Sizer at nospam.com  Tue May  6 23:12:02 2008
From: Sizer at nospam.com (Sizer)
Date: 6 May 2008 22:12:02 -0500
Subject: Can't drag and drop onto .py in Windows XP?
Message-ID: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>

I have several python utils that look at sys.argv to get a list of 
filenames to process and mangle the files in various ways. If I have a 
bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and 
bar.bat gets called with foo.avi as an argument, everyone's happy. But if I 
have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a big 
NO cursor and nothing happens.

Now I can work around this by creating a _bar.bat and having the _bar.bat 
call bar.pyw with the filenames it was passed (this is obviously 
ridiculous). Or I can create a shortcut which has the target of
   c:\python25\pythonw.exe c:\mybar\bar.pyw
and that works, but makes telling people how to install my utilities on 
their computer a pain in the rear. It's just a little weird that I can't 
just drag and drop file names onto .pyw or .py files. Am I missing 
something here?

Thanks for any help.


From saluk64007 at gmail.com  Tue May 27 02:22:20 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 23:22:20 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
Message-ID: <c3f69bf60805262322x28f281b1x7161e25287c2f721@mail.gmail.com>

I don't know if my posts are making it to the list, or if they are blocked
or what.  I have posted twice mentioning Spyce (
http://spyce.sourceforge.net/) to you but no one seems to respond to me.
Maybe if I send to you directly?  Spyce has been around a while but hasn't
been updated in a few years.  It's exactly what you want, and the first
python framework I used.

And as I said in a previous post, if you use cherrypy as your controller,
it's not that hard to write a directory access mechanism, and then you can
pretty easily work a system with templates to act like you want.  (You just
have to choose a template system you like and hook it up yourself).  The
whole thing shouldn't be more than about 15 lines of code to set up.

I hope this goes through...
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From timr at probo.com  Wed May 28 03:44:45 2008
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 May 2008 07:44:45 GMT
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <t43q34he184598aom7d8k0c5856c7jmtfl@4ax.com>

Jean-Claude Neveu <jcn-france1972 at pobox.com> wrote:
>
>I am writing a Python program to check email using POP3. I've tried 
>the sample code from python.org, and it works great. In other words, 
>the code below successfully prints out my emails.
>
>import getpass, poplib, email
>M = poplib.POP3('mail.blah.com')
>M.user('username')
>M.pass_('password')
>numMessages = len(M.list()[1])
>for i in range(numMessages):
>     for j in M.retr(i+1)[1]:
>         print j
>M.quit()
>
>However, if I understand right, the Python poplib library will also 
>parse the email for me so that I can iterate through the headers, 
>body, etc, of each message, and use them in my program. I think the 
>method I need to use is email.message_from_file, but I'm having 
>difficulty getting it to work. Can anyone explain me how I would 
>extend the above example to do this?
>
>I tried to do this by using in the i loop the line:
>
>	message = email.message_from_file(j)
>
>but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

You've received some very confusing advice in this thread.  Alex had the
right answer, but I want to expand it a bit.

You said "the Python poplib library will also parse the email for me". This
is incorrect.  poplib, like many of the modules of the Python standard
library, focuses on exactly one purpose: handling the POP3 protocol.  It
will allow you to count your messages, and fetch your messages, but that's
it, because that's all that POP3 does.  It's a very simple protocol.

Now, the standard library DOES include modules for parsing email, as you
seem to realize.  The "email" module is a very sophisticated tool for that
purpose.  However, the email module doesn't have any way to fech the mail.
So, you need to stitch them together.

poplib.retr gives you a string.  You need to hand that string to the email
module, and you do that using "email.message_from_string".
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From skanemupp at yahoo.se  Thu May 15 12:53:29 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:53:29 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
	<mailman.1179.1210870311.12834.python-list@python.org>
Message-ID: <b33dc5a2-a980-4309-853c-0c28b193b520@l42g2000hsc.googlegroups.com>

On 15 Maj, 18:33, "Andreas Tawn" <andreas.t... at ubisoft.com> wrote:
> >import os
>
> >print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> >d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> >d.readline()
>
> >returns true in the shell but prints no text even though the document
> >contains text.
>
> >d.name returns nothing, d.name() raises an error.
> >--
> >http://mail.python.org/mailman/listinfo/python-list
>
> Try...
>
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> for line in d:
>         print line
>
> And I'm guessing that's a typo in flim.txt?
>
> Cheers,
>
> Drea

nah no typos i figured this out


From skanemupp at yahoo.se  Fri May 16 09:07:18 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:07:18 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
Message-ID: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>

On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> globalrev a ?crit :
>
> > wassup here?
>
> > 7
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > <module>
> >     print cust1.getID()
> > AttributeError: 'NoneType' object has no attribute 'getID'
>
> > class customer:
>
> 1/ naming convention : class names should be CamelCased
> 2/ unless you need compatibility with years old Python versions, use
> newstyle classes
>
> class Customer(object):
>
> >     def __init__(self, ID, movies):
> >         self.ID = ID
> >         self.movies = movies
>
> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>
>      def __init__(self, id, movies):
>          self.id = id
>          self.movies = movies
>
> >     def getID():
> >         return self.ID
>
> >     def getMovies():
> >         return self.movies
>
> 4/ Python has support for computed attributes, so you just don't need
> these getters.
>
>
>
> > import os
> > import customer
> > import movie
>
> > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > mv1str = mv1.read()
>
> > print mv1str.count(',5,')
>
> > cust1 = customer.__init__('12',['1','435','2332'])
>
> __init__ is automagically called on instanciation, so you don't have to
> call it yourself. And FWIW, your __init__ returns None.
>
> cust1 = Customer('12', ['1', '435', '2332'])
>
> > print cust1.getID()
>
> print cust1.id


what should init return normally? a customer-object?

class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies
        return self


?


From vlastimil.brom at gmail.com  Wed May 14 20:00:33 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Thu, 15 May 2008 02:00:33 +0200
Subject: suggestions on code structuring? (classes; gui, data, methods...)
Message-ID: <9fdb569a0805141700t42bad9c3l2fed54f82be0abb2@mail.gmail.com>

Hi all;
I'd like to ask for suggestions regarding the appropriate structure of the
code of my app. It is a gui program (wxPython; wx.aui) displaying several
texts simultaneously. The user interface consists of multiple text widgets
and control panels for selecting the text parts and synchronising.
Basically the program reads several text files, analyses them, displays them
in the text controls and keeps track of some aditional indexing information
(used for synchronising the text with each other etc.

What would be an usual way of structuring the code? I tried to separate
distinct tasks to classes, but I am not sure, if this is the right way:
Currently I have a TextDB class containing the functions to parse the source
text, then it stores the resulting fulltext, the indexing data; it also
contains lookup methods for the text properties and also a display method
(expecting a gui widget to write into). There is one instance of this class
associated with each text.
Further there is an instance of a gui class (subclassing the wx.Panel -
TextCtrl and some basic controls) for each text; besides this there are also
panels with specific settings/selections of the individual texts. All this
is managed in a frame using wx.aui.AuiManager (the panes can be moved or
hidden, but in general, there might be over a dozen of panels used
simultaneously on the screen).

Now, what would be a standard approach to let the single instances
comunicate with each other? Is it usual, that the "data" instances are
created by the gui instances (or the main program class)? Or would
it be better to create an extra "dispatch" class communicating with the
others? (Here e.g. the user can select some text-property in the control
panel, this value is then checked in the respective TextDB instance; finally
the matching text part is shown in the text widget.)
Unfortunately, I couldn't find many relevant code examples or general
informations; actualy many tutorial etc. gui programs often have ratner few
classes, sometimes the only one.

Any suggestions, or references to some examples, concepts ... are much
appreciated;
thanks in advance;
      Vlasta
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From rocco.rossi at gmail.com  Fri May 16 10:06:05 2008
From: rocco.rossi at gmail.com (rocco.rossi at gmail.com)
Date: Fri, 16 May 2008 07:06:05 -0700 (PDT)
Subject: Variable by label
Message-ID: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>

Is there any function which will return a variable by passing to it
the string containing the variable's name? Something like this for
instance:

foo = some_function("foo")

or perhaps it's a dictionary. I don't know, but I would really like to
find out how it can be done. I guess it is achievable.

Thank you.


From hat at se-162.se.wtb.tue.nl  Fri May 16 04:03:44 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Fri, 16 May 2008 10:03:44 +0200
Subject: default object comparison considered harmful?
Message-ID: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>

Hello all,

Yesterday we found the cause of a bug that has caused problems for a long time.
It appeared to be the following:

class A(object):
    pass

print min(1.0, A())

which is accepted by Python even though the A() object is not numerical in
nature.

The cause of this behavior seems to be the compare operation of the object
class.


Is there a way to disable this behavior in Python (other than deriving a new
'object-like' class that doesn't do comparisons?)


Sincerely,
Albert


From afrobeard at gmail.com  Tue May 13 18:48:38 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:48:38 -0700 (PDT)
Subject: built in list generator?
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
	<68uba1F2ur7lkU1@mid.uni-berlin.de>
Message-ID: <96f76198-7120-4d59-8ab8-fa46aa2c70d3@t54g2000hsg.googlegroups.com>

range(50,100,2) returns a list of numbers starting from 50 and less
than 100 with a step size of 2.

list() takes any iterable datatype and converts it into a list.

e.g. list((1, 2, 3)) would return [1,2,3]
& list([1, 2]) would return [1,2]

In this case there is no point of calling range within list since the
output of range is already a list.

Note list(xrange(50,100,2)) would have made sense if range didnt exist
and you needed a list, but since range does exist, I dont see the
point.

Diez is right when he says to use list to iterate, because creating a
big list just for the sake of iteration would be a terrible waste of
space.

On May 14, 1:16?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev schrieb:
>
> > if i want ?a list with all numbers between x and y is there a way to
> > do this with an inbult function.
>
> > i mean i can always construct a function to do this but is there
> > soemthing like:
>
> > nbrs = list(range(50,100, 2))
>
> range *does* that. use xrange if all you want is to iterate.
>
> Diez



From eliben at gmail.com  Mon May 26 11:49:05 2008
From: eliben at gmail.com (eliben)
Date: Mon, 26 May 2008 08:49:05 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
Message-ID: <d371eade-7683-4007-8015-b752de2af6dd@34g2000hsh.googlegroups.com>

On May 25, 5:40 pm, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a small wxPython application. Today I was trying to add some
> RPC capability to it, so I implemented an instance of
> SimpleXMLRPCServer that runs in a separate thread when invoked and
> answers requests.
>
> All went fine until I realized that I have to sometimes stop the
> server - which is where I ran into a problem. Python threads can not
> be killed after they've been started. They can be kindly requested to
> end, but it's up to the thread itself to decide when it wants to
> finish. At least this is my understanding. It probably makes sense,
> because threads can hold resources which can't just be dropped
> suddenly, and have to be cleaned in a proper manner. (Does this sound
> like the truth ?)
>
> Anyway, this creates a problem because SimpleXMLRPCServer likes to
> block and never return. I dug deeper and found out that all offspring
> of SocketServer can only handle requests in a blocking manner. Even if
> you call handle_request( ) and not serve_forever(), it will block
> until a request is received and handled. This means that a
> SocketServer object running in a thread blocks the thread, and this
> thread can not be stopped.
>
> Is there any graceful solution to this problem ?
>
> I suppose I can use sockets in non-blocking mode, or use select(), but
> this will mean I will have to implement my server with raw sockets and
> not a handy helper like SocketServer. For the XML-RPC server I want
> this is a headache, as I will probably have to implement my own XML-
> RPC server based on raw non-blocking sockets.
>
> Thanks in advance for any ideas and suggestions
> Eli


I ended up using an ugly hack to make it work for me. Since
handle_request() only blocks until a request is received, the thread
can be unblocked by sending it a real message. So to stop a server, I
opened a XML-RPC client connection (using ServerProxy from xmlrpclib)
and made a request. In the server thread, handle_process() returned
and the thread could see the flag requesting it to stop.

There must be a better way ! Any ideas ?

Eli




From max at alcyone.com  Fri May  2 14:26:50 2008
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 02 May 2008 11:26:50 -0700
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87fxt0zs92.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<MPG.22853ae1f293060998975a@news.individual.de>
	<87fxt0zs92.fsf@benfinney.id.au>
Message-ID: <g_OdnTvuTbdxwYbVnZ2dnUVZ_g6dnZ2d@speakeasy.net>

Ben Finney wrote:

> No, because it's quite common for the PATH variable to have
> '/usr/local/bin' appear *before* both of '/bin' and '/usr/bin'.
> 
> If the system has a sysadmin-installed '/usr/local/bin/python'
> installed as well as the OS-installed '/usr/bin/python', then the two
> shebang options the OP raised will behave differently on such a
> system. This seems to be quite the point of the discussion.

Yes, and that's the reason the env form is preferred.  If someone -- 
either the system administrator, or the user environment, or the person 
executing the program on the fly -- has changed the PATH, they did it 
for a reason.  If /usr/local/bin is in the PATH before /usr/bin, then 
that is a deliberate choice (whether system-wide or not) to prefer 
executables in /usr/local/bin to those in /usr/bin, and that is being 
done for a very conscious reason.  Which is why the PATH exists in the 
first place, and why invoking the script with env is preferable.


-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis


From skipjack317 at clearwire.net  Sat May 31 19:59:09 2008
From: skipjack317 at clearwire.net (oregon skip)
Date: Sat, 31 May 2008 16:59:09 -0700 (PDT)
Subject: disappearing interpreter
Message-ID: <a273de89-2f33-4e13-8ca4-0dd1674b1fc7@w4g2000prd.googlegroups.com>

I am a new Python programmer, using Windows XP, IDLE and the
interpreter. Everything is
OK except that when I double check a name.py file it runs on the
interpreter, but the
window disappears before I can see what happened. Any suggestions?


From petr.poupa at gmail.com  Wed May  7 11:03:35 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Wed, 7 May 2008 08:03:35 -0700 (PDT)
Subject: listening on TCP port
Message-ID: <1515d2cc-6dec-4552-822c-0ba558be98c6@t54g2000hsg.googlegroups.com>

Hello,
is there anybody who has experience with listening on TCP port with
python? I am looking for anything codes, tutorials,... .
Thanks for any information


From maxerickson at gmail.com  Wed May  7 12:35:49 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 7 May 2008 16:35:49 +0000 (UTC)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
	<fvsj6s$n87$1@ger.gmane.org>
Message-ID: <Xns9A978027C1668maxericksongmailcom@80.91.229.13>

WolfgangZ <wollez at gmx.net> wrote:

> parag_paul at hotmail.com schrieb:
>> hi All,
>> http://mail.python.org/mailman/listinfo/python-list
>> 
> At least I'm living in a free country and nobody forces me to
> learn python. So I don't fully understand why you HAVE TO learn
> it. When your problems can be solved in a different programming
> language than you should be free to use whatever you like. And
> also why should it be forbidden to create a new programming
> language? Diversity and competition is usually not bad.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

I imagine that there is some English as a second language getting 
involved and the intent of the question was more like "What is 
python useful for on Windows?", which has pretty much the same 
meaning but is open to a slightly friendlier interpretation(i.e., 
tell me how I can use python instead of tell me why I should use 
python).

The other question might be more like "I already know VBS, what do I 
gain by learning python?".

(the answers could be "lots of things, including full applications" 
and "among other things, you can use it on other platforms, and you 
might prefer the syntax".)


max



From Lie.1296 at gmail.com  Wed May 14 00:06:41 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 21:06:41 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <007939c6-9fe7-462d-a8fc-e847d43cf50c@f24g2000prh.googlegroups.com>

On May 13, 11:20?pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > 5-10 times faster for what kind of code?
>
> Mostly numerical analysis and CGI scripting. ?All of Flaming Thunder's
> library code is in assembly language, and Flaming Thunder creates
> statically-linked pure syscall CGI scripts.
>
> > I don't see anything that resembles OO features of python, ...
>
> True. ?But in Python, you don't see statically-linked pure-syscall CGI
> scripts being cross-compiled under Windows for ftp'ing up to a Linux
> server. ?And you don't see the speed of pure assembly language
> libraries. ?And I'll be willing to bet that Flaming Thunder will have
> OO features similar to Python before Python has the features that
> Flaming Thunder already does.
>
> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year. ?But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

I don't think so, even Microsoft, the huge money netter, realized that
nobody would use their new .NET framework if they don't provide free
compilers for it, they only sold their IDE, not their compilers (did I
mention that the Visual Studio Express is free as in beer? And Express
isn't a crippled compiler)

> > And what is really expensive is brain-cycles, not cpu-cycles.
>
> Depends on whether you're the programmer, or the customer. ?I've found
> that customers prefer products that are 5 to 10 times faster, instead
> of products that were easy for the developer.
>
> And I disagree that Flaming Thunder requires more brain-cycles.
> Because it's based on leveraging existing English and math fluency
> (which was one of the original goals of Python, was it not?), I think
> that Flaming Thunder requires fewer brain-cycles because fewer brains
> cells have to be devoted to memorizing language peculiarities.

You keep mentioning that the original goals of Python is to "make it
English-like", well, I can say, you are wrong. The goals of  Python is
to make a usable language that have a clean and clutter-free syntax,
which is clearly the inverse of FT's goal. To say, Python's goal is to
make simple syntax that is easy to learn, learning process is
something which can't be avoided unless you've created a natural
language programming language.

As I see it, FT aimed to be a natural language programming language,
well, unless you can parse script like this;

Write down "Hello World" to the file in "C:\test.txt" then print the
output to the printer, if no printer can be found, then tell the user
"Cannot Find Printer" then write a log file that printing has failed.
Unless a = b, then make c equal to 4, or raise 5 to the power of 8 and
assign that to c when a is also equal to d. If the page has been
printed, then print a + b + c + d to the screen and wait for user
input up to 8 seconds before quitting.

Anything less than that, you've failed to create natural language
parser. The current state of FT, as I see it, is no more smarter or
intelligible or readable than Python, albeit with much more
unnecessary verbosity, which in Python, is frowned upon. Anything
between the current FT and a real natural language parser is a verbose
Perl ("there is more than one way to do it").

> > Let alone it is
> > very much a question of view-point if two different looping constructs or
> > keywords are more awkward than one general looping-concept with only one
> > keyword. It's a matter of taste.
>
> Perhaps. ?But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
>
> ? Write 10^2.
>
> but can't understand why another programming language gives the answer
> 8 (Python):
>
> ? Print 10^2
>
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Lol, that only means you haven't read the documentation of the
language. You can't write program without understanding the language,
which usually means reading the documentation, even in FT. Except in a
real natural language programming language, which you can write
anything and the compiler would (hopefully, as natural language has
many ambiguity) understand whatever you've written.

(snip)


From michele.simionato at gmail.com  Mon May 12 05:45:40 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 12 May 2008 02:45:40 -0700 (PDT)
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <9e0c171a-6156-46fc-b9db-a8aba01c1472@m44g2000hsc.googlegroups.com>

On May 12, 4:28?am, Yves Dorfsman <y... at zioup.com> wrote:
>there's got to be a better way than:
>
> d = time.local()
> y = d[0]
> d = d[1]

Uses Python 2.6! ;)

Python 2.6a3 (r26a3:62861, May 12 2008, 11:41:56)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.localtime()
time.struct_time(tm_year=2008, tm_mon=5, tm_mday=12, tm_hour=11,
tm_min=43, tm_sec=47, tm_wday=0, tm_yday=133, tm_isdst=1)
>>> t=time.localtime()
>>> t.tm_year, t.tm_mday
(2008, 12)




From nick at craig-wood.com  Fri May 23 05:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:09 -0500
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
Message-ID: <slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>

bukzor <workitharder at gmail.com> wrote:
>  That does, in fact work. Thanks! I'm a little sad that there's no
>  builtin way to do it, owell.
> 
> >>> def f(a, *args):
>  ...     print a
>  ...     for b in args: print b
>  ...
> >>> import inspect
> >>> a = [2,3]
> >>> b = {'a':1}
> >>> inspect.getargspec(f)
>  (['a'], 'args', None, None)
> >>> map(b.get, inspect.getargspec(f)[0])
>  [1]
> >>> map(b.get, inspect.getargspec(f)[0]) + a
>  [1, 2, 3]
> >>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
>  1
>  2
>  3

If I saw that in my code I'd be wanting to get rid of it as soon as
possible!

I'd re-write f() to have all named arguments then the problem becomes
easy and the answer pythonic (simple dictionary manipulation)...

So instead of f(a, *args) have f(a, list_of_args).

The f(*args) syntax is tempting to use for a function which takes a
variable number of arguments, but I usually find myself re-writing it
to take a list because of exactly these sort of problems.  In fact I'd
be as bold to say that f(*args) is slightly un-pythonic and you should
avoid as a user interface.  It does have its uses when writing
polymorphic code though.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From heikki at osafoundation.org  Fri May  2 14:20:32 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 11:20:32 -0700
Subject: SSL through python. possible ?
In-Reply-To: <c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com>
Message-ID: <NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>

Mike Driscoll wrote:
> On Apr 29, 8:56 am, TkNeo <tarun.... at gmail.com> wrote:
>> I need to do SSL file transfer using python? Is there a library i can
>> use ?
> 
> http://sandbox.rulemaker.net/ngps/m2/

M2Crypto has since moved to http://chandlerproject.org/Projects/MeTooCrypto

-- 
  Heikki Toivonen


From wholesalesandle at gmail.com  Thu May  8 13:47:43 2008
From: wholesalesandle at gmail.com (wholesalesandle at gmail.com)
Date: Thu, 8 May 2008 10:47:43 -0700 (PDT)
Subject: wholesale Coach Handbags ,wholesale coach  bags
Message-ID: <459b6a68-f26b-4c18-a923-916e2df7bc03@s33g2000pri.googlegroups.com>

wholesale Coach Handbags ,wholesale coach  bags,http://www.ok-
export.com


From marlin_rowley at hotmail.com  Thu May 15 12:44:14 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 11:44:14 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C60AB.2060406@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<482C60AB.2060406@islandtraining.com>
Message-ID: <BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>

Thanks for the advice!
 
However, I assumed that:
 
fourbytes = pixelComponent[:4]
 
would shave that byte off the array in pixelComponent.  So that the array is smaller by one on the next iteration.  Is this not the case?
 
I'm getting weird results now..
 
-M



> Date: Thu, 15 May 2008 09:11:23 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: How do I use the unpack function?> > Marlin Rowley wrote:> > All:> >> > I've got a script that runs really slow because I'm reading from a > > stream a byte at a time:> >> > // TERRIBLE> > for y in range( height ):> > for color in range(4):> > for x in range( width ):> > pixelComponent = fileIO.read(4)> > buffer = unpack("!f",pixelComponent) << unpacks ONE > > float, but we now can do something with that pixel component.> >> >> > I can speed this up dramatically if I did this:> >> > // MUCH FASTER> > for y in range( height ):> > for color in range(4):> > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more > > data from the stream into memory FIRST!!> > for x in range( width ):> > buffer = unpack( ?????? ) <<<< how do I get each float from > > the pixelComponent???> > Just carve of the first four bytes of pixelComponent on each pass > through the loop, and unpack that.> > for x in range(width):> fourbytes = pixelComponent[:4] # first 4 bytes> pixelComponent = pixelComponent[4:] # All but first four bytes> buffer = unpack("!f", fourbytes)> > > There are probably better ways overall, but this directly answers your > question.> > Gary Herron> > > >> >> > -M> > ------------------------------------------------------------------------> > With Windows Live for mobile, your contacts travel with you. Connect > > on the go. > > <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Get Free (PRODUCT) RED?  Emoticons, Winks and Display Pics.
http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008
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From http  Tue May 20 04:15:03 2008
From: http (Paul Rubin)
Date: 20 May 2008 01:15:03 -0700
Subject: compressing short strings?
Message-ID: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>

I have a lot of short English strings I'd like to compress in order to
reduce the size of a database.  That is, I'd like a compression
function that takes a string like (for example) "George Washington"
and returns a shorter string, with luck maybe 6 bytes or so.  One
obvious idea is take the gzip function, compress some large text
corpus with it in streaming mode and throw away the output (but
setting up the internal state to model the statistics of English
text), then put in "George Washington" and treat the additional output
as the compressed string.  Obviously to get reasonable speed there
would have to be a way to save the internal state after initializing
from the corpus.

Anyone know if this has been done and if there's code around for it?
Maybe I'm better off with freezing a dynamic Markov model?  I think
there's DMM code around but am not sure where to look.

Thanks.


From zerge69 at gmail.com  Wed May 21 21:57:42 2008
From: zerge69 at gmail.com (Zerge)
Date: Wed, 21 May 2008 18:57:42 -0700 (PDT)
Subject: How do I know when all threads are done?
Message-ID: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>

I can launch threads just fine, but then I have to do a time.sleep(n)
so the main thread from which they where launched will wait for all
the threads to return.

How can I detect when all threads are done and then return control to
the main threads?

Thanks for your help


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:28:44 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:28:44 -0400
Subject: can't delete from a dictionary in a loop
In-Reply-To: <mailman.1246.1210972944.12834.python-list@python.org>
References: <mailman.1246.1210972944.12834.python-list@python.org>
Message-ID: <x%mXj.46799$3v1.5089@bignews3.bellsouth.net>

Dan Upton wrote:

> for pid in procs_dict:
>   if procs_dict[pid].poll() != None
>    # do the counter updates
>    del procs_dict[pid]
> 
> The problem:
> 
> RuntimeError: dictionary changed size during iteration

I don't know if the setup with the pids in a dictionary is the best way to 
manage a pool of processes... I'll leave it others, presumably more 
knowledgable, to comment on that. :-)  But I can tell you how to solve the 
immediate problem:

   for pid in procs_dict.keys():
       ...

Hope this helps!

--Hans


From VarunKumar.Rajendran at cognizant.com  Tue May 13 08:02:10 2008
From: VarunKumar.Rajendran at cognizant.com (VarunKumar.Rajendran at cognizant.com)
Date: Tue, 13 May 2008 17:32:10 +0530
Subject: Need to install Python in windows 32 bit processor
Message-ID: <21A05FE37618574F9BBDFF23172DDCE603C185A0@CTSINCHNSXUT.cts.com>


Hi people,

 I am working with windows32 bit processor machine. 


I want to install Python in my machine.


I am not able to get the preferable installer  for installing python.

Can you tell, Which windows installer is preferable for windows32 bit
processor?




? Thanks and Regards,

VarunKumar R

Cognizant Technology Solutions |  Chennai | India

Ph:9962005560|044-43603608|V-net:453611









This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information.
If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.

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From gherron at islandtraining.com  Tue May 13 18:42:21 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 15:42:21 -0700
Subject: Why can't I import this?
In-Reply-To: <7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>	<mailman.1074.1210711800.12834.python-list@python.org>
	<7ddb9a42-9d5c-4266-aa0c-95466af10b6b@w34g2000prm.googlegroups.com>
Message-ID: <482A194D.7070005@islandtraining.com>

John Henry wrote:
> On May 13, 1:49 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> John Henry wrote:
>>     
>>> Hi list,
>>>       
>>> I can't understand this.  The following import statement works fine:
>>>       
>>>     from PythonCard.templates.dialogs import runOptionsDialog
>>>       
>>> but this one fails:
>>>       
>>>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>>>       
>> This kind of "dotted" name import only works for packages, and a
>> directory is considered a package only if it contains a file name
>> __init__.py.    Looking around my installation of PythonCard (on Linux)
>> I see that most of those directories *do NOT* have a __init__.py, so
>> they are not packages and cannot be imported that way.
>>
>> Of course this leaves unanswered the question of *how* you are supposed
>> to import that code.   I've never used PythonCard so I can't help
>> further, but I suggest looking at the documentation and examples
>> supplied.  And perhaps waiting for someone with experience with
>> PythonCard to answer.
>>
>> Gary Herron
>>
>> P.S. It is usually a waste of time to tell us that something fails
>> without telling us *how* it fails.  (Cut and paste the error message
>> always, and the traceback usually.)  If you don't, you will usually get
>> a request to supply that information, and then have wast3ed the time for
>> one full round of message to the group.  Even in this case, I'm only
>> guessing how it failed for you.
>>
>>     
>>> I've checked and rechecked to make sure that the spellings are proper
>>> and that the tools, the codeEditor directory, and codeEditor.py, and
>>> the class CodeEditor all exists and yet idle keep complaining that it
>>> can't import from PythonCard.tools.
>>>       
>>> What's going on?  (Running Python2.5 under WinXP).
>>>       
>>> Regards,
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>       
>
> Thank you very much.  I didn't know about the __init__.py
> requirement.  Appreciate it.
Actually I should have added that there ways to import such things, and 
PythonCard must be using some such method itself.  You can manipulate 
the sys.path variable, or directly call the import mechanism using the 
builtin __import__, or use a suppled "imp" module.    However, you 
should not have to do any such thing to use PythonCard.  It should do 
them in for you.


From mrkafk at gmail.com  Sat May  3 17:03:53 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 14:03:53 -0700 (PDT)
Subject: Error handling in SAX
Message-ID: <55e65c5e-1dd9-41d2-ab1c-7340cd4db558@25g2000hsx.googlegroups.com>

(this is a repost, for it's been a while since I posted this text via
Google Groups and it plain didn't appear on c.l.py - if it did appear
anyway, apols)

So I set out to learn handling three-letter-acronym files in Python,
and SAX worked nicely until I encountered badly formed XMLs, like with
bad characters in it (well Unicode supposed to handle it all but
apparently doesn't), using http://dchublist.com/hublist.xml.bz2 as
example data, with goal to extract Users and Address properties where
number of Users is greater than given number.

So I extended my First XML Example with an error handler:

# ========= snip ===========
from xml.sax import make_parser
from xml.sax.handler import ContentHandler
from xml.sax.handler import ErrorHandler

class HubHandler(ContentHandler):
    def __init__(self, hublist):
        self.Address = ''
        self.Users = ''
        hl = hublist
    def startElement(self, name, attrs):
        self.Address = attrs.get('Address',"")
        self.Users = attrs.get('Users', "")
    def endElement(self, name):
        if name == "Hub" and int(self.Users) > 2000:
            #print self.Address, self.Users
            hl.append({self.Address: int(self.Users)})

class HubErrorHandler(ErrorHandler):
    def __init__(self):
        pass
    def error(self, exception):
        import sys
        print "Error, exception: %s\n" % exception
    def fatalError(self, exception):
        print "Fatal Error, exception: %s\n" % exception

hl = []

parser = make_parser()

hHandler = HubHandler(hl)
errHandler = HubErrorHandler()

parser.setContentHandler(hHandler)
parser.setErrorHandler(errHandler)

fh = file('hublist.xml')
parser.parse(fh)

def compare(x,y):
    if x.values()[0] > y.values()[0]:
        return 1
    elif x.values()[0] < y.values()[0]:
        return -1
    return 0

hl.sort(cmp=compare, reverse=True)

for h in hl:
    print h.keys()[0], "   ", h.values()[0]
# ========= snip ===========

And then BAM, Pythonwin has hit me:


>>> execfile('ph.py')
Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)

Fatal Error, exception: hublist.xml:2247:11: not well-formed (invalid
token)


>>> ================================ RESTART ================================

Just before the "RESTART" line, Windows has announced it killed
pythonw.exe process (I suppose it was a child process).

WTF is happening here? Wasn't fatalError method in the HubErrorHandler
supposed to handle the invalid tokens? And why is the message repeated
many times? My method is called apparently, but something in SAX goes
awry and the interpreter crashes.




From daveparker at flamingthunder.com  Tue May 13 12:36:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:36:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
Message-ID: <bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>

> ... there's something that feels very unnatural about writing English as code.

I think it is ironic that you think Flaming Thunder is unnatural
because it is more English-like, when being English-like was one of
Python's goals: "Python was designed to be a highly readable language.
It aims toward an uncluttered visual layout, using English keywords
frequently where other languages use punctuation."
http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and_semantics

> Just using your "Set ... to" idiom, rather than a
> regular = assignment, makes things much more wordy, without improving
> readability.

I think it does improve readability, especially for people who are not
very fluent mathematically.

Also, in Python how do you assign a symbolic equation to a variable?
Like this?

QuadraticEquation = a*x^2 + b*x + c = 0

Set statements avoid the confusion of multiple equal signs when
manipulating symbolic equations:

Set QuadraticEquation to a*x^2 + b*x + c = 0.

On May 13, 9:50?am, "Dan Upton" <up... at virginia.edu> wrote:
> On Tue, May 13, 2008 at 11:24 AM, Dave Parker
>
> <davepar... at flamingthunder.com> wrote:
> > > ?The "Flaming Thunder" looks promising, but without being free
> > ?> software, it's unlikely it will create a large developer community,
> > ?> specially considering both free general purpose and scientific
> > ?> programming languages.
>
> > ?Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> > ?(and even less per individual for site licenses), which is less than
> > ?the cost of just one book on Python.
>
> Bah, subscription for a programming language? ?As far as I'm
> concerned, that's reason enough not to bother with it. ?Paying a
> one-time fee, or even once per upgrade, for a full-featured IDE and
> lots of support tools is painful but at least justifiable, whereas
> paying a yearly license just to even be able to try something out when
> there are so many free, sufficient options... There was an article
> on/in Wired not so long ago about the economics of free, and how
> there's a huge difference mentally between free and not-free, even if
> the practical difference is "free" and "$0.01." ?(Also, I assume
> hdante meant, at least partly, free as in speech, not free as in
> beer.)
>
> As an aside, I clearly haven't written anything in FT, but looking at
> your examples I don't know that I would want to--there's something
> that feels very unnatural about writing English as code. ?It also
> somehow seems a bit verbose, while one of the strengths of something
> like Python (since that's what you're comparing it to) is rapid
> implementation. ?Just using your "Set ... to" idiom, rather than a
> regular = assignment, makes things much more wordy, without improving
> readability. ?Some of your other structures are awkward, for instance
> "Something is a function doing" Again, more text with arguably no gain
> in readability.
>
> Just my two cents, anyway. ?I now return you to the resident madman,
> who I see has sent 4 or 5 messages while I was typing this one...



From inhahe at gmail.com  Sat May 17 15:01:10 2008
From: inhahe at gmail.com (inhahe)
Date: Sat, 17 May 2008 15:01:10 -0400
Subject: Python-list Digest, Vol 56, Issue 311
In-Reply-To: <da776a8c0805171159t2b06c13fh20613953701d1fbe@mail.gmail.com>
References: <mailman.19205.1211035697.12833.python-list@python.org>
	<da776a8c0805171159t2b06c13fh20613953701d1fbe@mail.gmail.com>
Message-ID: <da776a8c0805171201td2633d4n12b89c182214a8c3@mail.gmail.com>

didn't mean to re-post the whole digest. i forgot to clip what was after
this message.

On Sat, May 17, 2008 at 2:59 PM, inhahe <inhahe at gmail.com> wrote:

> i just installed visual studio 8 and tried to compile again, and I got the
> same exact problem.
>
>
>
>
>>
>> From: Christian Heimes <lists at cheimes.de>
>> To: python-list at python.org
>> Date: Sat, 17 May 2008 14:59:51 +0200
>> Subject: Re: help compiling Python on vs 2008!
>> inhahe schrieb:
>> > what is going on here, and how do I compile these external libraries?
>>
>> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
>> supported. Some extensions don't compile under VS 9.0
>>
>> Christian
>>
>>
>>
>>
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From bernardet at cppm.in2p3.fr  Mon May  5 10:18:43 2008
From: bernardet at cppm.in2p3.fr (Karim Bernardet)
Date: Mon, 05 May 2008 16:18:43 +0200
Subject: get the pid of a process with pexpect
Message-ID: <fvn52g$tc6$1@ccpntc8.in2p3.fr>

Hi

I am using pexpect to do ssh tunneling and to open a vnc server (jobs on 
a grid cluster). When the job is canceled, these 2 processes remain on 
the worker node (they are detached), so I have to kill them (using a 
trap command in the bash script of the job) but I need the pid of each 
process. I have tried to get it like this

ssh_tunnel = pexpect.spawn (tunnel_command % globals())
...
print ssh_tunnel.pid

but ssh_tunnel is not the pid of the ssh tunnel

Is there a way to get it using pexpect ?

Cheers

Karim


From b0bm00r3 at gmail.com  Mon May  5 17:04:23 2008
From: b0bm00r3 at gmail.com (philly_bob)
Date: Mon, 5 May 2008 14:04:23 -0700 (PDT)
Subject: Random/anonymous class methods
References: <801e1c38-ae54-443c-8d87-9745db7ef270@59g2000hsb.googlegroups.com>
Message-ID: <96370c0f-f6b0-43cb-9b9c-84a3967e6d27@m36g2000hse.googlegroups.com>

On Apr 27, 8:05 am, philly_bob <b0bm0... at gmail.com> wrote:
> In the sample program below, I want to send a random method to a class
> instance.
> In other words, I don't know which method to send until run-time.  How
> can I send ch, which is my random choice, to the myclass instance?
>
> Thanks,
>
> Bob=
>
> ####
> import random
>
> class myclass(object):
>    def meth1(self):
>       print 'meth1'
>    def meth2(self):
>       print 'meth2'
>
> c=myclass()
> meths=['meth1', 'meth2']
> ch=random.choice(meths)
> c.ch()


Thanks for your responses, everybody.  Turned out to be easiest to use
Arnaud's Getattr suggestion.  Below is a simplification of what I
ended up with; the trick appears in the algday class.

"""
I have dictionaries of OHLC tuples (open, high, low, close market
prices) for two hypothetical stocks (HUN and TEN); the dictionaries
are keyed to dates.

For each day that we have data, we want to be able to evaluate an
algorithm of the form:

   (mysum 'HUN' 'open' 'TEN', close)

in other words, to add the opening value of HUN to the closing value
of TEN.

Stock names and market values are stored in two lists: namelist and
valuelist. Namelist contains the stock symbols (HUN, TEN). Valuelist
contains dictionaries keyed to dates.  Associated in the dictionary
with
each date is a tuple containing OHLC prices. Note that even in this
sample
we have to allow for days when one stock has market values
and the other stock doesn't, as in the case of 20080424.

We use a class algday, which, given an algorithm and day, has a method
calc() which returns the result of applying that algorithm to the day.
This class (algday) uses another class, namedayval, which, given a
stock name and a
OHLC valuename, returns the value.

=Bob Moore
Thanks to Arnaud Delobelle, Aaron Brady, and Ben Finney.

"""

import random

class namedayvals(object):
   def __init__(self,name,date):
      self.name=name
      self.date=date
      self.index=namelist.index(name)
      self.valuelist=valuelist[self.index]
      self.dayswithvals=self.valuelist.keys()
   def open(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][0]
   def high(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][1]
   def low(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][2]
   def close(self):
      if self.date not in self.dayswithvals:
          return 'NA'
      else:
          return self.valuelist[self.date][3]

class algday(object):
   def __init__(self,myop,sec1,meth1,sec2,meth2,date):
       self.myop=myop
       self.sec1=sec1
       self.meth1=meth1
       self.sec2=sec2
       self.meth2=meth2
       self.date=date
   def show(self):
       print 'algday',
self.myop,self.sec1,self.meth1,self.sec2,self.meth2,self.date
   def calc(self):
       s1=namedayvals(self.sec1, self.date)
       x1=getattr(s1,self.meth1)()
       s2=namedayvals(self.sec2, self.date)
       x2=getattr(s2,self.meth2)()
       if self.myop=='mysum':
          out=mysum(x1,x2)
       elif self.myop=='myless':
          out=myless(x1,x2)
       elif self.myop=='mydiv':
          out=mydiv(x1,x2)
       elif self.myop=='mytimes':
          out=mytimes(x1,x2)
       else:
          out='NA'
       return out

def mydiv(num1, num2):
   if num1=='NA' or num2=='NA':
       temp='NA'
   else:
       if num2==0:
           temp=0.0
       else:
           temp=float(num1)/float(num2)
   return temp

def myless(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1-num2
   return temp

def mytimes(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1*num2
   return temp

def mysum(num1,num2):
   if num1=='NA' or num2=='NA':
      temp='NA'
   else:
      temp=num1*num2
   return temp

#####

namelist=[]
valuelist=[]
namelist.append('HUN')
valuelist.append(dict({'20080422': (100.1,100.2,100.3,100.4),
                       '20080423': (101.1,101.2,101.3,101.4),
                       '20080424': (102.1,102.2,102.3,102.4)}))
namelist.append('TEN')
valuelist.append(dict({'20080422': (10.1,10.2,10.3,10.4),
                       '20080423': (11.1,11.2,11.3,11.4)}))

operatorlist=['mydiv','mysum','myless','mytimes']
valuenames=['open','high','low','close']
daylist=['20080422','20080423','20080424']

while 1:
   rop=random.choice(operatorlist)
   rn1=random.choice(namelist)
   rv1=random.choice(valuenames)
   rn2=random.choice(namelist)
   rv2=random.choice(valuenames)
   print rop,rn1,rv1,rn2,rv2
   calcs=[]
   for date in daylist:
       a=algday(rop,rn1,rv1,rn2,rv2,date)
       calcs.append([date,a.calc()])
   print 'daily calcs=', calcs
   print 'Control-C to stop'







From bignose+hates-spam at benfinney.id.au  Sun May  4 23:26:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 05 May 2008 13:26:43 +1000
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <874p9dfn2k.fsf@benfinney.id.au>

notbob <notbob at nothome.com> writes:

> Am I likely to receive any help, here, or is there another irc,
> forum, etc, that might better serve a complete amateur such as
> myself. Thnx.

This forum is particularly welcoming to newbies, I've found. Go ahead
and start a new thread for any Python question.

One caveat: When you do compose a message asking a question, please
make the Subject field of your message meaningful by itself and don't
put anything like "Newbie question" in there. If it's a newbie
question, we'll figure that out for ourselves, and it shouldn't affect
whether or not it gets answered.

(You haven't done anything like that, but I'm noting it in advance and
because I hope *other* newbies will also see this and take note.)

-- 
 \        "I'd take the awe of understanding over the awe of ignorance |
  `\                                       any day."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From bignose+hates-spam at benfinney.id.au  Sun May 11 09:02:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 11 May 2008 23:02:53 +1000
Subject: How to uninstall something installed by "setup.py install"?
References: <4826cc2f$0$655$bed64819@news.gradwell.net>
Message-ID: <87r6c9803m.fsf@benfinney.id.au>

tinnews at isbd.co.uk writes:

> I have installed a development version of rdiff-backup using its
> "setup.py install" but now find I need to uninstall it. Is there any
> 'easy' way to do this and/or can I find out what files it has
> installed where so I can remove them?

Sadly, the re-invention of package management as seen in
'easy_install' does not implement an "uninstall" command.

This is one reason why many of us avoid it and use system-wide package
management instead. Unfortunately, not all operating systems are
mature enough to have decent package management.

-- 
 \      "Yesterday I saw a subliminal advertising executive for just a |
  `\                                        second."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From dickinsm at gmail.com  Mon May 12 10:21:51 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Mon, 12 May 2008 07:21:51 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com><hkse24lhna7fp26tcfv5literfaded6nov@4ax.com><mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com> 
	<mailman.962.1210572565.12834.python-list@python.org>
Message-ID: <03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>

On May 12, 2:09?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well
> defined whether y is 0 or not, even though there is a discontinuity in the
> limit.

Well, there's a difference:  the limit of exp(y*log(x)) as (x, y) ->
(0, a) exists for all finite nonzero a.  The limit as (x, y) ->
(0, 0) doesn't.

> 2.5 raises an exception. ?In 3.0,>>> (-2)**1.99999999
>
> (3.9999999722741113-1.2566370355167477e-07j)

Interesting---I hadn't realised that 3.0 had changed this.
I can't quite decide whether I like this behaviour much.  It
seems to be the only case where a computation involving only
floats can produce a complex number.

>
> | Incidentally, the decimal module is slightly schizophrenic about this:
>
> That module follows the IBM-led standard, no matter how crazy.

Yeah---I know. :-).  The current decimal __pow__ code is mostly
my fault, at least in 2.5.2/2.6/3.0 onwards.  For what it's
worth, the author of the Decimal standard has indicated that
the behaviour of 0**0 might change after IEEE 754r finally
sees the light of day.

Mark


From larry.bates at websafe.com`  Tue May 13 09:25:40 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 08:25:40 -0500
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <isydnU3sOO_3C7TVnZ2dnUVZ_obinZ2d@comcast.com>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

I use it quite often, especially if I want to implement a fixed number of 
retries on a communications channel.

-Larry


From google at zvis.com  Wed May  7 01:39:48 2008
From: google at zvis.com (Zvi)
Date: Tue, 6 May 2008 22:39:48 -0700 (PDT)
Subject: Problem parsing SOAP envelope with ElementTree
Message-ID: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>

Hi All,

   Can someone tell me why id the following not working?
I have a soap response envelope, for test purpose it's just a string
and I create ElementTree from it.
Then I try to find Response tag, but I get None.


       data = """<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/
soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
                  <soap:Body> <Get2Response xmlns="http://
tempuri.org/">
                     <Get2Result><![CDATA[<?xml version='1.0'
encoding='UTF-8'?> <Response> <Entity Name='Accounts'
Current='00300571B42F1DEC8E9B6CDF19A59950'> <Instance
                     Id='00300571B42F1DEC8E9B6CDF19A59950'> <Field
Name='Status' Value='2'/> <Field Name='Id' Value='MC4670'/> <Field
Name='Name' Value='ACDC Industries Inc'/>
                     <Field Name='City' Value='Milwaukee'/> <Field
Name='MainContact' Value=''/> <Field Name='CreatedOn'
Value='20070723051316.0000000 '/> </Instance> </Entity>  </
Response>]]></Get2Result>
                  </Get2Response></soap:Body></soap:Envelope>"""

       ElementTree.XMLTreeBuilder = SimpleXMLTreeBuilder.TreeBuilder
       dom=ElementTree.fromstring(data)

       if dom == None:
         return "Empty Dom"

       response = dom.find('{http://schemas.xmlsoap.org/soap/
envelope/}Response')
       if response == None:
         return "Empty Response"

       if I try to use
response = dom.find('{http://tempuri.org/}Response') this doesn't work
either.

What am I doing wrong?


From marlin_rowley at hotmail.com  Fri May 16 19:23:54 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:23:54 -0500
Subject: arrays
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W4954482C76D90A2A9729639FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M
_________________________________________________________________
Give to a good cause with every e-mail. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?souce=EML_WL_ GoodCause
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From thorsten at thorstenkampe.de  Sun May  4 13:16:54 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sun, 4 May 2008 19:16:54 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
Message-ID: <MPG.22880dee9cc808bf98975c@news.individual.de>

* ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> Hi, what's the default localedir for gettext module on windows? In
> Linux, it's /usr/share/locale. Where should I put the *.mo file in
> order to make the translation work?

%PYTHONHOME%\share\locale

Thorsten


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 16 10:11:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 16 May 2008 16:11:36 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
Message-ID: <482d9618$0$2656$426a74cc@news.free.fr>

globalrev a ?crit :
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
(snip)
>>>     def getMovies():
>>>         return self.movies
>> 4/ Python has support for computed attributes, so you just don't need
>> these getters.

 > when class =
 > class customer:

Please, do yourself and the world a favour, follow naming conventions 
(not only will this make your code more readable, but also quite a lot 
of things in Python rely on conventions).

And really, use newstyle classes unless you have a *very* compelling 
reason not to.

class Customer(object):

 >     def __init__(self, idnbr, movies):
 >         self.idnbr = idnbr
 >         self.movies = movies
 >

> print "cust", cust1.idnbr, cust1.movies()

Why do you want to call a list ???

> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable

Indeed. cust1.movie being a list, that's just what you would expect. 
Hint : what do you think will happen with the following code:

   alist = [1, 2, 3]
   alist()

When I say that Python has support for computed attributes, it doesn't 
mean it will automagically add getters/setters for your attributes, but 
that by default you just *don't need* getters/setters - you'll be able 
to transparently add them latter if there's an effective need for them - 
where "transparently" means "without client code knowing it's in fact 
calling a getter or setter".

Example:

# before:
class Foo(object):
    def __init__(self, name):
       # just a plain attribute assignment
       self.name = name

f = Foo('bruno')
# just a plain attribute access
print f.name

# after
class Foo(object):
    def __init__(self, name):
       # still looks like a plain attribute assignment
       self.name = name

    # defining the setter and getter
    def _setname(self, name):
      print "setting %s name to '%s'" % (self, name)
      self._name = name
    def _getname(self):
      print "retrieving %s name ('%s')" % (self, self._name)
      return self._name.upper()

    # and making this a computed attribute using the getter and
    # setter under the hood
    name = property(fget=_getname, fset=_setname)

f = Foo('bruno')
# still looks like a plain attribute access
print f.name

Also, given your recent posts here, I strongly suggest you take some 
time doing at least the official tutorial.

HTH


From wizzardx at gmail.com  Sun May  4 09:32:22 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 15:32:22 +0200
Subject: ISBN Barecode reader in Python?
In-Reply-To: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040632n1646defbq776c78065b771b21@mail.gmail.com>

On Sun, May 4, 2008 at 1:41 PM, Joseph <cephire at gmail.com> wrote:
> All: I have written a program to query Amazon with ISBN and get the
>  book details. I would like to extend so that I can read ISBN from the
>  barcode (I will take a photo of the same using webcam or mobile). Are
>  there any opensource/free SDK doing the same? As it is a hobby
>  project, I don't like to spend money on the SDK.
>

I Googled a bit and found this:

http://jocr.sourceforge.net/index.html

According to the docs it should be able to scan bar codes.

David.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 11:12:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 17:12:29 +0200
Subject: Function creation (what happened?)
In-Reply-To: <f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
	<f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>
Message-ID: <482469dc$0$4280$426a74cc@news.free.fr>

Viktor a ?crit :
> This completely slipped of my mind... :)
> 
> I'm trying to change the:
> http://wordaligned.org/svn/etc/echo/echo.py
> 
> So if the function is method it prints ClassName.MethodName instead of
> MethodName(self|klass|cls=<... ClassName>).
> 
> But it turned out that in the decorator, the wrapped function is
> always just a TypeFunction 

s/TypeFunction/function/

> (I cannot find out if the function is
> method, classmethod, staticmethod or just a plain function

The latter, unless you decorate it with a classmethod or staticmethod 
object before.

> - tried
> with inspect also)... And what is most interesting, when I do:
> 
> def w(fn):
>     print 'fn:', id(fn)
>     return fn
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> 
> It turns out that the function I receive in the wrapper (even when I
> return the same function) is not the function which will finally be
> attached to the class...

Yes it is. But A.__init__ is *not* a function, it's a method. To get at 
the function, you must use A.__dict__['__init__'] or A.__init__.im_func

> Is there a way to find out in the decorator "what will the decorated
> function be"?

Yes : the decorated function is the function you decorate with the 
decorator.

Ok, this requires some explanations (nb: only valid for new-style classes):

- First point : what you declare in the class statement are plain 
ordinary function. When the class statement is executed - that is, 
usually[1], at import time - these function objects become attributes of 
the class object.
[1] IOW : if your class statement is at the top-level of your module

- Second point: the function class implements the descriptor 
protocol[2], so when an attribute lookup resolves to a function object, 
the function's class __get__ method is invoked
[2] http://users.rcn.com/python/download/Descriptor.htm

- Third point: the function's __get__ method returns a method object, 
either bound (if lookup was done on an instance) or unbound (if the 
lookup was done on a class).

The function's class __get__ method could be implemented this way:

    def __get__(self, instance, cls):
        return types.MethodType(self, instance, cls)


- Fourth point: a method object is a thin callable wrapper around the 
function, the instance (if provided), and the class. It could look like 
this:

class Method(object):
   def __init__(self, func, instance, cls):
     self.im_func = func
     self.im_self = instance
     self.im_class = cls

   def __repr__(self):
     if self.im_self is None:
       # unbound
       return "<unbound method %s.%s>" \
               % (self.im_class.__name__, self.im_func.__name__)
     else:
       # bound
       return "<bound method %s.%s of %s>" \
                % (self.im_class.__name__,
                   self.im_func.__name__,
                   self.im_self)

   def __call__(self, *args, **kw):
     if self.im_self is None:
       try:
         instance, args = args[0], args[1:]
       except IndexError:
         raise TypeError(
           "unbound method %s() must be called with %s instance "
           " as first argument (got nothing instead)" \
           % (self.im_func.__name__, self.im_class.__name__)
       if not isinstance(instance, self.im_class):
         raise TypeError(
           "unbound method %s() must be called with %s instance "
           " as first argument (got %s instead)" \
           % (self.im_func.__name__, self.im_class.__name__, instance)

     else:
       instance = self.im_self
     return self.im_func(instance, *args, **kw)

The classmethod and staticmethod classes (yes, they are classes...) have 
their own implementation for the descriptor protocol - 
classmethod.__get__ returns a Method instanciated with func, cls, 
type(cls), and staticmethod.__get__ returns the original function.


So as you can see - and classmethods and staticmethods set aside -, what 
you decorate is *always* a function. And you just can't tell from within 
the decorator if this function is called "directly" or from a method 
object. The only robust solution is to decorate the function with your 
own custom callable descriptor. Here's a Q&D untested example that 
should get you started (warning : you'll have to check for classmethods 
and staticmethods)

class wmethod(object):
     def __init__(self, method):
        self.method = method

     def __call__(self, *args, **kw):
        # called as a method
        # your tracing code here
        # NB : you can access the method's
        # func, class and instance thru
        # self.method.im_*,
        return self.method(*args, **kw)

class w(object):
     def __init__(self, func):
       self.func = func

     def __get__(self, instance, cls):
       return wmethod(self.func.__get__(instance, cls))

     def __call__(self, *args, **kw):
       # called as a plain function
       # your tracing code here
       return self.func(*args, **kw)


HTH


From hat at se-162.se.wtb.tue.nl  Mon May 19 04:01:40 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 19 May 2008 10:01:40 +0200
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <slrng32cv4.egt.hat@se-162.se.wtb.tue.nl>

On 2008-05-16, Kay Schluehr <kay.schluehr at gmx.net> wrote:
> On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> Hello all,
>>
>> Yesterday we found the cause of a bug that has caused problems for a long time.
>> It appeared to be the following:
>>
>> class A(object):
>>     pass
>>
>> print min(1.0, A())
>>
>> which is accepted by Python even though the A() object is not numerical in
>> nature.
>>
>> The cause of this behavior seems to be the compare operation of the object
>> class.
>>
>> Is there a way to disable this behavior in Python (other than deriving a new
>> 'object-like' class that doesn't do comparisons?)
>>
>> Sincerely,
>> Albert
>
> Are you sure you don't want to use a statically typed language that
> captures all type errors just by inspecting your source code?

yes.

The problem here is that it isn't caught at all, neither at 'compile' time nor
at run-time. That means that the Python language considers this proper code.

Whether you make that decision by inspecting source code or at run-time is
irrelevant here.


Unfortunaly, we have to maintain Python 2.3 compability.
As a solution, I have created a new BaseObject class as follows:

class BaseObject(object):
    """
    Generic base class without default compare and hashing functions.
    """
    def __cmp__(self, other):
        """ Disable default compare method """
        raise NotImplementedError

    def __hash__(self):
        """ Disable default hashing method """
        raise NotImplementedError("Implement me in class '%s'"
                                                    % self.__class__.__name__)


Sincerely,
Albert


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:25:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:25:02 -0300
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
	<0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
Message-ID: <op.ua3bb0t9x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 08:13:01 -0300, alex23 <wuwei23 at gmail.com> escribi?:
> On May 13, 8:18 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:

>> May I ask *where* did you read that crazy idea?
>
> Grant Edwards outlines his past behaviour here:
> http://groups.google.com/group/comp.lang.python/msg/27553bd56827dc0f
>
> Given that all nine of his postings have inflammatory topics, he's
> beginning to sound like a troll.

Ah! Thanks. I didn't recognize him.

-- 
Gabriel Genellina



From hat at se-162.se.wtb.tue.nl  Wed May 21 11:05:03 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 21 May 2008 17:05:03 +0200
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
Message-ID: <slrng38egv.2j3.hat@se-162.se.wtb.tue.nl>

On 2008-05-21, zhf <mypromise at sina.com> wrote:
> I want ro walk a directory and its sub directory on linux,
> to find some shell script file, and run them, but I found some path belong
> blank charactor, such as '8000 dir', if I write as follow, I got error
> "no such file"
> path = '8000 dir'
> for root, dirs, files in os.walk(path):
> cmd = ' '
> cmd = 'cd ' + root
> os.system(cmd)
>
> How can I repair it?

Escape the space to prevent the shell from interpreting it as a word seperator.
This of course also holds for all other shell meta characters,
such as * [ ] \ > < & and a few others I probably have forgotten.


I am not sure why you execute 'cd' commands in a sub-shell, as it is not very
useful. (that is, you start a new sub-process, in that sub-process you run the
'cd' command (causing the cwd of the sub-process to change directory), and then
the sub-process ends)

You most likely want to change the cwd of the Python process. If so, have a
look at os.chdir(). That function has the added advantage that there is no
shell in between that interprets all those meta characters (that is,
"os.chdir('8000 dir')" will work without further effort).

Sincerely,
Albert


From mattheww at chiark.greenend.org.uk  Sun May 25 17:52:25 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 22:52:25 +0100 (BST)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<g1cic3$3e9$1@panix3.panix.com>
	<mailman.1580.1211748858.12834.python-list@python.org>
Message-ID: <DL*MFNds@news.chiark.greenend.org.uk>

David  <wizzardx at gmail.com> wrote:
> Might be a difference in project size/complexity then, rather than
> company size. Most of my works projects are fairly small (a few
> thousand lines each), very modular, and each is usually written and
> maintained by one developer. A lot of the programs will be installed
> together on a single server, but their boundaries are very clearly
> defined.

> Personally I've had to do very little bug fixing and maintenance.
> Thorough testing of all my changes before they go into production
> means that I've caught 99% of the problems, and there is very little
> to fix later.

> That's why I'm surprised to hear that such a huge amount of time is
> spent on testing maintenance, and why the other posters make such a
> big deal about unit tests.

> I'm not a genius programmer, so it must be that I'm lucky to work on
> smaller projects most of the time.

This is close to my experience. One lesson we might draw is that
there's an advantage to structuring your work as multiple small
projects whenever possible, even if making one big project seems more
natural.

I should think everyone would be happy with a bug-coping strategy of
"don't write the bugs in the first place", if at all possible. My guess
is that the main part of the 'small project' advantage is that all
changes can be written or reviewed by someone who is decently familiar
with the whole program.

That does suggest that if programmers do find that they're spending
more than half of their time fighting bugs, it might be worthwhile to
invest time in having more people become very familiar with the
existing code.

-M-


From mcknight0219 at gmail.com  Sun May 11 09:23:02 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 11 May 2008 06:23:02 -0700 (PDT)
Subject: Problem with custom events in wxpython
Message-ID: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>

hi, all

I'm having a problem with creating custom events in wxpython.

I have a class A handling some data processing work and another class
B of GUI matter. I need GUI to display information when data in A is
updated.
I know cutom events in wxpython may work. But I found no material
paricularly
helpful :(

can anyone write me some demo code to show how to do this or ant
reference to
materials? thanks


From arnodel at googlemail.com  Sun May 25 13:21:47 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 25 May 2008 18:21:47 +0100
Subject: raising an exception when multiple inheritance involves same
	baseThank
References: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <m2wsli5mfo.fsf@googlemail.com>


Sorry I lost the original post.

Paul McGuire <ptmcg at austin.rr.com> writes:

> On May 25, 8:37?am, Michael Hines <michael.hi... at yale.edu> wrote:
>> Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
>> not multiple inheritance per se I prohibit but only multiple inheritance
>> involving more than one HocObject class, I replaced your len(bases) > 1
>> test with
>> <code>
>> ? ? m = False
>> ? ? for b in bases :
>> ? ? ? if hasattr(b, '__mro__'):
>> ? ? ? ? for bb in b.__mro__ :
>> ? ? ? ? ? if bb == MetaHocObject.ho :
>> ? ? ? ? ? ? if m == True:
>> ? ? ? ? ? ? ? raise Exception("Inheritance of multiple HocObject not
>> allowed")
>> ? ? ? ? ? ? m = True
>>
>> </code>

I think you don't need to look at the bases' mros, just use
issubclass(), e.g. (untested):

    if sum(1 for b in bases if issubclass(b, HocObject)) > 1:
        raise Exception("Multiple inheritance from HocObject")

>> to get
>>
>> class A(HocObject): pass
>>
>> class B(object): pass
>>
>> class C(): pass
>>
>> class D(C, B, HocObject): pass # ok
>>
>> class D(C, A, HocObject): pass # fail
>>
>> When I fold this idea into my code I may even try to eliminate the class
>> factory aspect of
>> class Foo(hclass(h.Vector))
>> in favor of
>> class Foo(h.Vector)
>>
>> Thanks again,
>> Michael
>
> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
>
> -- Paul
>
>
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

All new-style classes descend from object, so any new-style class
with at least two bases makes a diamond!  For example the first
version of class D above inherits twice from object, so it will be
caught.

OTOH, old-style classes don't have an __mro__, so this will not catch
diamond inheritance of old-style classes.  E.g

class A: pass
class B(A): pass
class C(A): pass
class D(B, C): pass

-- 
Arnaud


From bruno.desthuilliers at gmail.com  Mon May 19 16:58:48 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:58:48 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
Message-ID: <4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>

On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
(snip)
> The main
> concept here: identity [usually] implies equality,

I really enjoyed the "usually" disclaimer !-)


From nick at craig-wood.com  Sun May  4 16:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sun, 04 May 2008 15:30:03 -0500
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
Message-ID: <slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>

Joseph <cephire at gmail.com> wrote:
>  All: I have written a program to query Amazon with ISBN and get the
>  book details. I would like to extend so that I can read ISBN from the
>  barcode (I will take a photo of the same using webcam or mobile). Are
>  there any opensource/free SDK doing the same? As it is a hobby
>  project, I don't like to spend money on the SDK.

Pick yourself up a cue-cat barcode reader, eg from here or ebay

  http://www.librarything.com/cuecat

These appear as a keyboard and "type" the barcode in to your program.

Cheap and effective.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From greg.ewing at canterbury.ac.nz  Wed May  7 21:40:32 2008
From: greg.ewing at canterbury.ac.nz (Greg Ewing)
Date: Thu, 08 May 2008 13:40:32 +1200
Subject: ANN: Assembly Line 0.5
Message-ID: <mailman.777.1210256653.12834.python-announce-list@python.org>

I've uploaded a new version of my PyWeek 6 game, Assembly Line.

   http://media.pyweek.org/dl/6/gregpw6/AssemblyLine-0.5.zip

As a potential Pyggy entry, I'm keen to get some testing and feedback on it.

This version is greatly expanded. Some of the new features include:

     * More machine types and enhanced machine functionality
     * Simulation of a market that's buying your products
     * Multiple factories
     * Extensive reports showing what's going on with sales and finances
     * Sales and profit targets to aim for, and salary raises to seek after

Note that not all the products and machines are available at once now. The new 
machines will become available as the game progresses (about one every two 
months of game time) and you need to spend money to research new products.

I still haven't done much playtesting or balancing -- I've verified that the 
Phunky Phrisbee, Mojo Mallet and Supa Slice can be manufactured and sold at a 
profit, but I don't know about the others yet.

-- 
Greg


From gabe at dragffy.com  Thu May 15 06:08:11 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:08:11 +0000 (UTC)
Subject: List behaviour
Message-ID: <loom.20080515T100725-874@post.gmane.org>

Hi all

Just wondering if someone could clarify this behaviour for me, please?

>>> tasks = [[]]*6
>>> tasks
[[], [], [], [], [], []]
>>> tasks[0].append(1)
>>> tasks
[[1], [1], [1], [1], [1], [1]]

Well what I was expecting to end up with was something like:
?>>> tasks
[[1], [], [], [], [], []]


I got this example from page 38 of Beginning Python.

Regards

Gabriel





From msc at es.aau.dk  Wed May  7 06:48:44 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 12:48:44 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<mailman.696.1210151866.12834.python-list@python.org>
Message-ID: <wdwd4nyv183.fsf@msc-dt.kom.auc.dk>

>>>>> "Ian" == Ian Kelly <ian.g.kelly at gmail.com> writes:
Ian> Isn't lazy evaluation sort of the whole point of replacing a list
Ian> with an iterator? Besides which, running up to the first yield when
Ian> instantiated would make the generator's first iteration
Ian> inconsistent with the remaining iterations.

That wasn't my idea, although that may not have come across quite
clearly enough. I wanted the generator to immediately run until right
before the first yield so that the first call to next() would start with
the first yield.

My objection is that generators _by default_ have different semantics
than the rest of the language. Lazy evaluation as a concept is great for
all the benefits it can provide, but, as I've illustrated, strictly lazy
evaluation semantics can be somewhat surprising at times and lead to
problems that are hard to debug if you don't constantly bear the
difference in mind. In this respect, it seems to me that my suggestion
would be an improvement. I'm not any kind of expert on languages,
though, and I may very well be missing a part of the bigger picture that
makes it obvous why things should be as they are.

As for code to slightly change the semantics of generators, that doesn't
really address the issue as I see it: if you're going to apply such code
to your generators, you're probably doing it exactly because you're
aware of the difference in semantics, and you're not going to be
surprised by it. You may still want to change the semantics, but for
reasons that are irrelevant to my point.

Martin


From irmen.NOSPAM at xs4all.nl  Sun May 11 05:40:45 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 11 May 2008 11:40:45 +0200
Subject: what does int means for python ?
In-Reply-To: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>
Message-ID: <4826bf47$0$14345$e4fe514c@news.xs4all.nl>

alefajnie wrote:
> #!/usr/bin/env python
> 
> arr = [[0 for c in range(0, 10)] for r in range(0, 10)]             #
> 10x10 array
> 
> arr[2,3]                 # throws TypeError: list indices must be
> integers
> arr[int(2), int(3)]     # also throws TypeError: list indices must be
> integers !
> 
> -------------------------------------------------
> what is wrong in above script ?
> 
> 

try arr[2][3] instead.

basically your version is trying to index an array with a tuple argument (2,3).

--irmen


From Scott.Daniels at Acm.Org  Sun May 25 18:31:29 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 15:31:29 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <mailman.1573.1211736978.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>	<mailman.1555.1211681333.12834.python-list@python.org>	<5hv*dSKds@news.chiark.greenend.org.uk>
	<mailman.1573.1211736978.12834.python-list@python.org>
Message-ID: <WPKdnQM0ws80e6TVnZ2dnUVZ_v7inZ2d@pdx.net>

David wrote:

> It was an interesting exercise, and I'm encouraged to try it further.
Yes, The developed code is missing an overview, but this is an example 
implementing something we all understand a "stack".  The layout is a
little short on vertical whitespace, but I'm presuming you do that for
e-mail / newsgroup purposes.

> Would you normally start with a basic TestStackBehavoiur class, and
> when Stack becomes more complicated, split the tests up into
> TestEmptyStackContext, TestStackWithOneElementContext, etc?
I split about the time my setUp or tearDown needs to get tricky in order
to handle my different cases.  I also often add new classes for new 
projects.

> Another thing I noticed is that some of my test cases were redundant.
> Would you normally leave in the redundant tests, or remove the ones
> which are included in the more general test?
I get a bit lazy about refactoring tests.

> Also, I have another question. How do you unit test event loops?
I seldom do event loop _unit_ tests.  Most of the code is not in the
event environment, so most of the code I unit test is broken out.
If you have to be a bit more in bed with the event system, consider
a mock event system that connects to your code and provides specific
event chains and "expects" certain responses.

--Scott David Daniels
Scott.Daniels at Acm.Org


From skanemupp at yahoo.se  Fri May 16 07:36:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 04:36:08 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
Message-ID: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>

wassup here?


>>>
7

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
<module>
    print cust1.getID()
AttributeError: 'NoneType' object has no attribute 'getID'
>>>



class customer:
    def __init__(self, ID, movies):
        self.ID = ID
        self.movies = movies

    def getID():
        return self.ID

    def getMovies():
        return self.movies


import os
import customer
import movie

mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
mv1str = mv1.read()

print mv1str.count(',5,')

cust1 = customer.__init__('12',['1','435','2332'])
print cust1.getID()


From grflanagan at gmail.com  Thu May 22 15:14:01 2008
From: grflanagan at gmail.com (Gerard flanagan)
Date: Thu, 22 May 2008 21:14:01 +0200
Subject: Producing multiple items in a list comprehension
In-Reply-To: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
Message-ID: <4835C5F9.5040600@gmail.com>

Joel Koltner wrote:
> Is there an easy way to get a list comprehension to produce a flat list of, 
> say, [x,2*x] for each input argument?
> 
> E.g., I'd like to do something like:
> 
> [ [x,2*x] for x in range(4) ]
> 
> ...and receive
> 
> [ 0,0,1,2,2,4,3,6]
> 
> ...but of course you really get a list of lists:
> 
> [[0, 0], [1, 2], [2, 4], [3, 6]]
> 
> I'm aware I can use any of the standard "flatten" bits of code to turn this 
> back into what I want, but I was hoping there's some way to avoid the "lists 
> of lists" generation in the first place?
> 
> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
> list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
> do so?
> 
> Thanks,
> ---Joel
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

For the first part:

def gen(n):
     for i in xrange(n):
         yield i
         yield 2*i

print list(gen(4))

[0, 0, 1, 2, 2, 4, 3, 6]

gerard


From kamhung.soh at gmail.com  Sat May 10 22:09:38 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 12:09:38 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<op.uawq8posev04yd@hungvista> <m2iqxm4m86.fsf@googlemail.com>
Message-ID: <op.uaywacb3ev04yd@hungvista>

On Sat, 10 May 2008 18:06:17 +1000, Arnaud Delobelle  
<arnodel at googlemail.com> wrote:

> "Kam-Hung Soh" <kamhung.soh at gmail.com> writes:
>
>> On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:
>>
>>>> > What would be the best method to print the top results, the one's  
>>>> that
>>>> > had the highest amount of anagrams??  Create a new histogram dict?
>>>>
>>>> You can use the max() function to find the biggest list of anagrams:
>>>>
>>>> top_results = max(anagrams.itervalues(), key=len)
>>>>
>>>> --
>>>> Arnaud
>>>
>>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>>> lists?  Is there a way to specific top three w/ a max command??
>>>
>>
>> Built-in max() function only returns one result.
>>
>> My solution is to make a sorted list and return last three items:
>>
>> sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]
>
> Using the key= parameter of sorted() beats explicit DSU:
>
> sorted(anagrams.itervalues(), key=len)[-3:]
>
> Or even
>
> sorted(anagrams.itervalues(), key=len, reverse=True)[:3]
>

Nice!

I just found out that DSU = Decorate-Sort-Undecorate idiom, from  
http://wiki.python.org/moin/HowTo/Sorting.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From saluk64007 at gmail.com  Sun May 11 00:06:13 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 10 May 2008 21:06:13 -0700
Subject: Free Memory
In-Reply-To: <op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
	<g0161h$lc3$1@ger.gmane.org>
	<c3f69bf60805090844i311d3656i8d7ef3c16d88cc72@mail.gmail.com>
	<op.uay0rgdmx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <c3f69bf60805102106n524cc6b9qc6c1f5fba0c8ee63@mail.gmail.com>

Yeah I don't know much about locals or globals.  I've never used them
before, just know they are there.  But anyway, to illustrate what I meant by
the interesting behavior, here is the output (and sorry for it being so
long):

IDLE 2.6a2
>>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__',
'__doc__': None, '__package__': None}
>>> globals().clear()
>>> globals()
{'__builtins__': {'bytearray': <type 'bytearray'>, 'IndexError': <type
'exceptions.IndexError'>, 'all': <built-in function all>, 'help': Type
help() for interactive help, or help(object) for help about object., 'vars':
<built-in function vars>, 'SyntaxError': <type 'exceptions.SyntaxError'>,
'unicode': <type 'unicode'>, 'UnicodeDecodeError': <type
'exceptions.UnicodeDecodeError'>, 'isinstance': <built-in function
isinstance>, 'copyright': Copyright (c) 2001-2008 Python Software
Foundation.
All Rights Reserved.

Copyright (c) 2000 BeOpen.com.
All Rights Reserved.

Copyright (c) 1995-2001 Corporation for National Research Initiatives.
All Rights Reserved.

Copyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam.
All Rights Reserved., 'NameError': <type 'exceptions.NameError'>,
'BytesWarning': <type 'exceptions.BytesWarning'>, 'dict': <type 'dict'>,
'input': <built-in function input>, 'oct': <built-in function oct>, 'bin':
<built-in function bin>, 'SystemExit': <type 'exceptions.SystemExit'>,
'StandardError': <type 'exceptions.StandardError'>, 'format': <built-in
function format>, 'repr': <built-in function repr>, 'sorted': <built-in
function sorted>, 'False': False, 'RuntimeWarning': <type
'exceptions.RuntimeWarning'>, 'list': <type 'list'>, 'iter': <built-in
function iter>, 'reload': <built-in function reload>, 'Warning': <type
'exceptions.Warning'>, '__package__': None, 'round': <built-in function
round>, 'dir': <built-in function dir>, 'cmp': <built-in function cmp>,
'set': <type 'set'>, 'bytes': <type 'str'>, 'reduce': <built-in function
reduce>, 'intern': <built-in function intern>, 'issubclass': <built-in
function issubclass>, 'Ellipsis': Ellipsis, 'EOFError': <type
'exceptions.EOFError'>, 'locals': <built-in function locals>, 'slice': <type
'slice'>, 'FloatingPointError': <type 'exceptions.FloatingPointError'>,
'sum': <built-in function sum>, 'getattr': <built-in function getattr>,
'abs': <built-in function abs>, 'exit': Use exit() or Ctrl-Z plus Return to
exit, 'print': <built-in function print>, 'True': True, 'FutureWarning':
<type 'exceptions.FutureWarning'>, 'ImportWarning': <type
'exceptions.ImportWarning'>, 'None': None, 'hash': <built-in function hash>,
'len': <built-in function len>, 'credits':     Thanks to CWI, CNRI,
BeOpen.com, Zope Corporation and a cast of thousands
    for supporting Python development.  See www.python.org for more
information., 'frozenset': <type 'frozenset'>, '__name__': '__builtin__',
'ord': <built-in function ord>, 'super': <type 'super'>, '_': None,
'TypeError': <type 'exceptions.TypeError'>, 'license': Type license() to see
the full license text, 'KeyboardInterrupt': <type
'exceptions.KeyboardInterrupt'>, 'UserWarning': <type
'exceptions.UserWarning'>, 'filter': <built-in function filter>, 'range':
<built-in function range>, 'staticmethod': <type 'staticmethod'>,
'SystemError': <type 'exceptions.SystemError'>, 'BaseException': <type
'exceptions.BaseException'>, 'pow': <built-in function pow>, 'RuntimeError':
<type 'exceptions.RuntimeError'>, 'float': <type 'float'>, 'MemoryError':
<type 'exceptions.MemoryError'>, 'StopIteration': <type
'exceptions.StopIteration'>, 'globals': <built-in function globals>,
'divmod': <built-in function divmod>, 'enumerate': <type 'enumerate'>,
'apply': <built-in function apply>, 'LookupError': <type
'exceptions.LookupError'>, 'open': <built-in function open>, 'quit': Use
quit() or Ctrl-Z plus Return to exit, 'basestring': <type 'basestring'>,
'UnicodeError': <type 'exceptions.UnicodeError'>, 'zip': <built-in function
zip>, 'hex': <built-in function hex>, 'long': <type 'long'>,
'ReferenceError': <type 'exceptions.ReferenceError'>, 'ImportError': <type
'exceptions.ImportError'>, 'chr': <built-in function chr>, 'xrange': <type
'xrange'>, 'type': <type 'type'>, '__doc__': "Built-in functions,
exceptions, and other objects.\n\nNoteworthy: None is the `nil' object;
Ellipsis represents `...' in slices.", 'Exception': <type
'exceptions.Exception'>, 'tuple': <type 'tuple'>, 'UnicodeTranslateError':
<type 'exceptions.UnicodeTranslateError'>, 'reversed': <type 'reversed'>,
'UnicodeEncodeError': <type 'exceptions.UnicodeEncodeError'>, 'IOError':
<type 'exceptions.IOError'>, 'hasattr': <built-in function hasattr>,
'delattr': <built-in function delattr>, 'setattr': <built-in function
setattr>, 'raw_input': <built-in function raw_input>, 'SyntaxWarning': <type
'exceptions.SyntaxWarning'>, 'compile': <built-in function compile>,
'ArithmeticError': <type 'exceptions.ArithmeticError'>, 'str': <type 'str'>,
'property': <type 'property'>, 'GeneratorExit': <type
'exceptions.GeneratorExit'>, 'int': <type 'int'>, '__import__': <built-in
function __import__>, 'KeyError': <type 'exceptions.KeyError'>, 'coerce':
<built-in function coerce>, 'PendingDeprecationWarning': <type
'exceptions.PendingDeprecationWarning'>, 'file': <type 'file'>,
'EnvironmentError': <type 'exceptions.EnvironmentError'>, 'unichr':
<built-in function unichr>, 'id': <built-in function id>, 'OSError': <type
'exceptions.OSError'>, 'DeprecationWarning': <type
'exceptions.DeprecationWarning'>, 'min': <built-in function min>,
'UnicodeWarning': <type 'exceptions.UnicodeWarning'>, 'execfile': <built-in
function execfile>, 'any': <built-in function any>, 'complex': <type
'complex'>, 'bool': <type 'bool'>, 'ValueError': <type
'exceptions.ValueError'>, 'NotImplemented': NotImplemented, 'map': <built-in
function map>, 'buffer': <type 'buffer'>, 'max': <built-in function max>,
'object': <type 'object'>, 'TabError': <type 'exceptions.TabError'>,
'callable': <built-in function callable>, 'ZeroDivisionError': <type
'exceptions.ZeroDivisionError'>, 'eval': <built-in function eval>,
'__debug__': True, 'IndentationError': <type 'exceptions.IndentationError'>,
'AssertionError': <type 'exceptions.AssertionError'>, 'classmethod': <type
'classmethod'>, 'UnboundLocalError': <type 'exceptions.UnboundLocalError'>,
'NotImplementedError': <type 'exceptions.NotImplementedError'>,
'AttributeError': <type 'exceptions.AttributeError'>, 'OverflowError': <type
'exceptions.OverflowError'>, 'WindowsError': <type
'exceptions.WindowsError'>}}
>>>

The OP wanted to clear the interpreter and I took a very broad (and highly
unresearched) stab at it, and saw some behavior that I wasn't expecting.
So before, all the builtin variables are hidden away in __builtins__, but
after clearing globals, they are filled into globals.  This doesn't really
make sense to me, but I don't know much about __builtins__ or globals.

I just realized this only happens in idle however.  From the python console,
clearing globals REALLY clears globals - even globals() is unbound when you
do that.  So it's not such a good thing to do :)
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From john106henry at hotmail.com  Tue May 13 15:31:52 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 12:31:52 -0700 (PDT)
Subject: Why can't I import this?
Message-ID: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>

Hi list,

I can't understand this.  The following import statement works fine:

    from PythonCard.templates.dialogs import runOptionsDialog

but this one fails:

    from PythonCard.tools.codeEditor.codeEditor import CodeEditor

I've checked and rechecked to make sure that the spellings are proper
and that the tools, the codeEditor directory, and codeEditor.py, and
the class CodeEditor all exists and yet idle keep complaining that it
can't import from PythonCard.tools.

What's going on?  (Running Python2.5 under WinXP).

Regards,


From salil_reeves at yahoo.co.in  Wed May 21 22:34:08 2008
From: salil_reeves at yahoo.co.in (salil_reeves)
Date: Thu, 22 May 2008 02:34:08 -0000
Subject: related to python
Message-ID: <g12m30+ejo5@eGroups.com>

develop a function called standardise_phrase to convert
the user's input to a standard form for subsequent processing. This 
involves:
1. removing all inter-word punctuation, which for our purposes is 
assumed to
consist only of commas (`,'), full stops (`.'), exclamation marks 
(`!') or
question marks (`?');
2. stripping away any leading and trailing blank spaces; and
3. replacing words in the user's input with ELIZA's preferred 
vocabulary.
how it is done ??
can anyone help me with it



From nicola.musatti at gmail.com  Fri May  2 10:07:32 2008
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: Fri, 2 May 2008 07:07:32 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <44f10aa9-6021-48b7-ae72-fa70f09a9d0e@f63g2000hsf.googlegroups.com>

On May 2, 3:50 pm, mcse jung <mcsej... at yahoo.com> wrote:
> Here is asample program that writes a program and then executes it.
> Do you knowof a much simpler way of writing a program that writes a program?

Use a templating engine, such as Cheetah: http://www.cheetahtemplate.org/

Cheers,
Nicola Musatti


From gherron at islandtraining.com  Tue May 13 16:49:44 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 13:49:44 -0700
Subject: Why can't I import this?
In-Reply-To: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
Message-ID: <4829FEE8.8050905@islandtraining.com>

John Henry wrote:
> Hi list,
>
> I can't understand this.  The following import statement works fine:
>
>     from PythonCard.templates.dialogs import runOptionsDialog
>
> but this one fails:
>
>     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>   

This kind of "dotted" name import only works for packages, and a 
directory is considered a package only if it contains a file name 
__init__.py.    Looking around my installation of PythonCard (on Linux) 
I see that most of those directories *do NOT* have a __init__.py, so 
they are not packages and cannot be imported that way.


Of course this leaves unanswered the question of *how* you are supposed 
to import that code.   I've never used PythonCard so I can't help 
further, but I suggest looking at the documentation and examples 
supplied.  And perhaps waiting for someone with experience with 
PythonCard to answer.


Gary Herron

P.S. It is usually a waste of time to tell us that something fails 
without telling us *how* it fails.  (Cut and paste the error message 
always, and the traceback usually.)  If you don't, you will usually get 
a request to supply that information, and then have wast3ed the time for 
one full round of message to the group.  Even in this case, I'm only 
guessing how it failed for you.


> I've checked and rechecked to make sure that the spellings are proper
> and that the tools, the codeEditor directory, and codeEditor.py, and
> the class CodeEditor all exists and yet idle keep complaining that it
> can't import from PythonCard.tools.
>
> What's going on?  (Running Python2.5 under WinXP).
>
> Regards,
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From gagsl-py2 at yahoo.com.ar  Mon May 26 11:52:25 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 12:52:25 -0300
Subject: Writing traceback of an exception into a log-file
References: <5213E58D85BC414998FA553C701E386C0EF281CB4D@SGBD012511.dlrmail.ad.delarue.com>
Message-ID: <op.ubrqdnidx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 05:31:27 -0300, <Dominique.Holzwarth at ch.delarue.com> escribi?:

> I'm trying to write the traceback stack of an exception that is thrown into a log file, but currently all that's written is simply a "None" :-/
>
> Here's some example code of what I'm doing:
>
> Import traceback
> class myException(Exception):
>         def __init__(self):
>                 f = open('filename.txt', 'a')
>                 traceback.print_exc(file=f)
>                 f.close()
>
> The file handling (opening etc) works ok (I'm using the same file in combination with a Logger() object too) but the string written to the file is effectively just a "None".
>
> Could anyone explain to me how to properly use the traceback module with it's countless of functions? =)

Don't inherit from Exception - you should be able to log *any* exception, not only this specific one, I presume? print_exc writes "the exception currently being handled", not the one you're creating right now. Put the code above into your exception handler:

try:
     1/0
except:
     f = open('filename.txt', 'a')
     traceback.print_exc(file=f)
     f.close()

(or define a function and call it from the exception handler)

-- 
Gabriel Genellina



From stef.mientki at gmail.com  Wed May 28 13:32:29 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Wed, 28 May 2008 19:32:29 +0200
Subject: definition of a highlevel language?
In-Reply-To: <d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com>
Message-ID: <483D972D.8060802@gmail.com>

Avowkind wrote:
> On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
>   
>> (might not be the right forum for this but...)
>>
>> what is the definition of a highlevel-language?
>>
>> well there isnt one specifically and wikipedia and the like gives just
>> a very general description obv you can say it abstracts away lowlever
>> operations.
>>
>> yes but how?
>>
>> a function like map takes a function and applies it to a list for
>> example.
>> this abstracts away a common procedure like iterate through a list and
>> for every position do a computation.
>> so it is a higherorderfunction. is this how higher-level-languages are
>> built?
>>
>> so are they fundamentally differently built or is it just a lot of
>> lowlevel operations built on top of each other?
>>
>> haskell is considered a very highlevellanguage but can you do
>> systemsprogramming with it(yes maybe it is very unpractical i dont
>> know but can you)?
>>
>> is lambda calculus a more abstract and efficient way of modeling a
>> computer? meaning you start at a higher level of abstraction and can
>> work up to even higher even faster?
>>
>> how did lispmachines work? was the basic system programmed in LISP?
>>     
>
>
> A lot of the previous comments have been about levels of abstraction
> of the programming langauge - which may be the answer you want.
> Another way of looking at it is that we want to be able to move from
> the language of the solution domain - e.g. computers, bits and bytes
> to the language of the problem domain.
>
> When we think about 'level' we don't just want to look at how basic
> statements work. we also need to think about whether the language is
> capable of simply and clearly expressing the problem.
>
> If your problem domain is mathematics then mathcad and its ilk are
> near perfect high level programming languages as the programs look
> just like the problems.
>
>   
Andrew, that's very good description, and I totally agree !
> if your problem domain is controlling a water works then you may tend
> to write your problem like this:
>
> if the water level is over 10 metres then start pump
> if the water level is below 5 metres then stop pump
>   
I would go one step beyond that, and state the problem as:
"keep the reservoir full, but not too full"
> which in python might turn out to be
>
> if water_level > 10:
>     pump.start()
> if water_level < 5:
>     pump.stop()
>
> which is fairly close.
>   
And now the solution is less close ;-)
And it becomes even less close,
if we extend your solution somewhat more to a real world implementation,
something like this:

control = True
while control :
    if water_level > 10:
        pump.start()
    if water_level < 5:
        pump.stop()


And if you would propose this solution to a control system engineer,
he/she would say: "this solution works very bad" or even "this solution 
won't work"
A solution that would work, should incorporate at least a hysteresis and 
could look like this:

control = True
State   = False
while control :
  if State and ( water_level > 10 ) :
    pump.start()
    State = not ( State )
  elif not ( State )  and ( water_level < 5 ) :
    pump.stop()
    State = not ( State )

and now what's the resemblance to the orginal problem :
   "keep the reservoir full, but not too full"
;-)

So an adequate high level language,
should do exactly like a control engineer would do (btw I'm not a 
control engineer):
1- asking what do you mean by "full"
2- not asking what's the other level,
but asking what's the intended use: how often and how many water is 
added or used,
what are the costs of the pump, etc etc
after which
   the control engineer
       or
  the high level language
can calculate the optimal hysteresis.
> of course with the addition of some brackets C++ could be this clear
> too. The key though is the abstraction given by the pump class and
> implicitly by object oriented design.
>
>
> In this pattern Form designers, visual web page layout tools and their
> ilk are very high level - but only if your problem is that you need to
> design a lot of business forms or web pages.  Some problems are best
> described visually, some in text, some in mathematics.
>   
I agree that some problems are better described in one or the other form,
but it's not the major issue.
e.g. Flowcharts are a perfect high level solution for problems in many 
domains.
But flowcharts, just like computer languages, visual design languages 
and math,
are only valuable in the hands of domain experts.

What the major issue is,
    that makes a computer language or a design environment in general,
really high level,
is the availability of the domain expertise.

Therefor the only high level language I'm aware of is ...
... LabView

Labview offers a lot of domain expertise in almost any domain,
so anyone
  with just a little knowledge of the problem domain,
and
  with just a little programming experience or math knowledge,
can solve any problem in every domain with Labview.
Possibly I'm exaggerating a bit ;-)


cheers,
Stef

> Andrew.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From skanemupp at yahoo.se  Tue May 13 16:05:12 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 13:05:12 -0700 (PDT)
Subject: built in list generator?
Message-ID: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>

if i want  a list with all numbers between x and y is there a way to
do this with an inbult function.

i mean i can always construct a function to do this but is there
soemthing like:

nbrs = list(range(50,100, 2))


From hniksic at xemacs.org  Tue May 13 02:48:15 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 13 May 2008 08:48:15 +0200
Subject: py3k concerns. An example
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com>
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com>
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org>
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com>
	<4810977E.3060509@v.loewis.de>
	<201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
Message-ID: <87y76esnrk.fsf@mulj.homelinux.net>

Paul McGuire <ptmcg at austin.rr.com> writes:

> I see that there is some movement to "get rid of bound methods," but
> I don't fully understand how this will be done, nor how I will
> adjust my code to compensate.

Isn't it supposed to get rid of *un*bound methods?  That is,
Class.method will simply return the function object used to define
'method', rather than a specialized "unbound method" object.
object.method will continue to return bound method objects, which are
required for method calls to work.


From aahz at pythoncraft.com  Sun May 18 00:39:36 2008
From: aahz at pythoncraft.com (Aahz)
Date: 17 May 2008 21:39:36 -0700
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <g0obu8$4vp$1@panix3.panix.com>

In article <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5 at j22g2000hsf.googlegroups.com>,
hdante  <hdante at gmail.com> wrote:
>
>How can I access Usenet without using Google Groups ? (my ISP doesn't
>have a NNTP server). Do you recommend doing so ?

If you'd like an ISP with a decent news server, I highly recommend
panix.com

>What's your prefered news reader ?

trn3.6, same as it's been for the last eighteen years.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From Lie.1296 at gmail.com  Fri May 23 03:20:29 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 23 May 2008 00:20:29 -0700 (PDT)
Subject: Python(2.5) reads an input file FASTER than pure C(Mingw)
References: <6a3f8226-04c6-4ee3-b5a6-f76aca44aa31@a23g2000hsc.googlegroups.com>
	<6420bfba-089d-41c6-a34f-b26e8b35afd7@x41g2000hsb.googlegroups.com> 
	<10e0c170-97ab-41bb-b501-f54790cc69ff@a70g2000hsh.googlegroups.com> 
	<f8d6c1e4-0118-487e-8d84-21993d467ab0@c58g2000hsc.googlegroups.com> 
	<983df81f-2d6a-4ee0-aea2-8780894fd706@a70g2000hsh.googlegroups.com> 
	<c4b94c10-92b4-4fa2-8595-f66186107cbe@a22g2000hsc.googlegroups.com> 
	<250c1ceb-1c0d-41e4-a3c6-25e20ac4f22c@a1g2000hsb.googlegroups.com> 
	<258c926b-47f2-4c8d-86ca-b97fc8abfb18@f36g2000hsa.googlegroups.com> 
	<2d06b319-e2fd-4790-af61-6f90b9b1b3b1@m1g2000pre.googlegroups.com> 
	<41e72e61-6413-41f3-a162-dbcc1ec5fcee@f63g2000hsf.googlegroups.com> 
	<f1aa0a0a-5c5f-4428-ad11-a2aba98be137@t12g2000prg.googlegroups.com> 
	<c7b349e1-3da1-412e-a617-9c299d8b73ed@c58g2000hsc.googlegroups.com>
Message-ID: <ac0d94c5-9b5e-43bc-aff5-c73a35f88159@t12g2000prg.googlegroups.com>

On Apr 30, 8:57?pm, n00m <n... at narod.ru> wrote:
> >>> a = ['zzz', 'aaa']
> >>> id(a[0]), id(a[1])
>
> (12258848, 12259296)>>> a.sort()
> >>> id(a[0]), id(a[1])
>
> (12259296, 12258848)
>
>

That proves you know nothing, that is a list operation, not a string
operation.


From daveparker at flamingthunder.com  Mon May 12 21:18:05 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 18:18:05 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
Message-ID: <bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>

On May 12, 7:12?pm, castiro... at gmail.com wrote:
> Mine's been always messing up the color wheel.

Messing up in what way?  Are you using the colors to visualize
something?


From mailpitches at email.com  Fri May  2 14:20:45 2008
From: mailpitches at email.com (mp)
Date: Fri, 2 May 2008 11:20:45 -0700 (PDT)
Subject: Non-blocking connect
References: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>
	<roy-FBC09A.14034702052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <1029ba0a-74e0-41d3-8397-7e326f4611bf@a9g2000prl.googlegroups.com>

Thanks Roy. I was just trying to understand someone else's code, but
in the end it turns out that this was just a bug.

What weirded me out was how injecting a print statement preventing the
error from occurring, but now I get it. Without blocking, the
connection handshake occurs in parallel after the connect_exc method
is called. In my example, my processor reaches the send call before
the connection manages to complete in the background. However, if you
stick in a print statement after the connect_exc call and before the
send call, it delays processing just long enough for the connection to
complete, thus no exception is thrown by the send call.


From bj_666 at gmx.net  Wed May 28 14:06:40 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 May 2008 18:06:40 GMT
Subject: while-loop?
References: <483d9ce7$0$3125$e4fe514c@dreader18.news.xs4all.nl>
Message-ID: <6a5l9gF34fb6rU2@mid.uni-berlin.de>

On Wed, 28 May 2008 19:56:55 +0200, huub wrote:

> Being a newbie with Python, I'm trying a short program with this:
> 
>  > <..>
>> t = RoboInterface()
>  > <..>
>> while not t.Digital(1): # while endpoint is not reached
>>  15         pass
> 
> However, it always hangs on the 'while', which I can't find in the 
> tutorial at http://www.python.org/doc/. Assuming 'while' should work, 
> what's wrong with the code?

Obviously the condition is alway true.  Maybe you have to do something
within the loop so it eventually will be false at some point!?

Ciao,
	Marc 'BlackJack' Rintsch


From ukaluzhny at nds.com  Thu May 15 04:17:33 2008
From: ukaluzhny at nds.com (urikaluzhny)
Date: Thu, 15 May 2008 01:17:33 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
Message-ID: <51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>

On May 15, 10:06?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> | It seems that I rather frequently need a list or iterator of the form
> | [x for x in <> while <>]
>
> I can think of two ways to interpret that.
I mean like [x for x in <A> if <B>], only that it breaks the loop when
the expression <B> is false.


From daveparker at flamingthunder.com  Wed May 21 16:56:48 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 13:56:48 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
Message-ID: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>

On May 21, 2:44?pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:

> My understand is no, not if you're using IEEE floating point.

Yes, that would explain it.  I assumed that Python automatically
switched from hardware floating point to multi-precision floating
point so that the user is guaranteed to always get correctly rounded
results for +, -, *, and /, like Flaming Thunder gives.  Correct
rounding and accurate results are fairly crucial to mathematical and
scientific programming, in my opinion.


From agustin.villena at gmail.com  Sun May 18 16:16:04 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Sun, 18 May 2008 13:16:04 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
Message-ID: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>

Hi!

is there anyway to show the class of a method in an exception's
traceback?

For example, the next code

class Some(object):
    def foo(self,x):
        raise Exception(x)

obj = Some()
obj.foo("some arg")

produces the next traceback

Traceback (most recent call last):
  File "<string>", line 231, in run_nodebug
  File "G:\dev\exceptions\sample.py", line 7, in <module>
    obj.foo("some arg")
  File "G:\dev\exceptions\sample.py", line 3, in foo
    raise Exception(x)
Exception: some arg

I want to improve the line
File "G:\dev\exceptions\sample.py", line 3, in foo

to
File "G:\dev\exceptions\sample.py", line 3, in Some.foo

Is this improvement feasible


From bockman at virgilio.it  Wed May 28 14:10:34 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Wed, 28 May 2008 20:10:34 +0200
Subject: Python Threads - stopped vs. gone vs. Alive
References: <1495901c-62c0-4977-8623-46deee092b56@26g2000hsk.googlegroups.com>
	<2007b7d8-6548-4bf6-af91-71208930db27@2g2000hsn.googlegroups.com>
	<1057dae0-43dd-477a-b686-5f79d0627161@27g2000hsf.googlegroups.com>
Message-ID: <pan.2008.05.28.18.10.31.229706@virgilio.it>

On Wed, 28 May 2008 11:38:53 -0700, RossGK wrote:

> 
> I've answered my own question about the "None" state - an event was
> setting the thread to None where I didn't expect it.
> 
> However, my question slightly repositioned is if a Thread is "Stopped"
> it still seems to exist. Is there someway to make it go away, send it
> to garbage collection etc?
> 
You have to call the join() method of the thread object from another
thread. This will terminate the thread and free its resources. This is
usually the task of the parent thread which usually does something
like:
     t = MyTread(...)
     t.start()
     # do your own stuff, then before quitting
     t.join() # Note that this waits until t is terminated



> Other part of the original Q - I assume a Stopped thread gets a false
> from "isAlive" and a Running thread gets a true?

Yes. You can try yourself:

>>> import threading
>>> class MyThread(threading.Thread):
	def __init__(self): threading.Thread.__init__(self)
	def stop(self): self._stop = True
	def run(self):
		self._stop= False
		while self._stop == False:
			import time
			time.sleep(0.1)

			
>>> t = MyThread()
>>> t.start()
>>> t.isAlive()
True
>>> t.isAlive()
False
>>> t.join()
>>> t.isAlive()
False


Ciao
----
FB


From kyosohma at gmail.com  Wed May 28 17:22:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 28 May 2008 14:22:49 -0700 (PDT)
Subject: datetime.stdptime help
References: <mailman.1653.1211902484.12834.python-list@python.org> 
	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com> 
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
	<483d941f$0$9032$5402220f@news.sunrise.ch>
Message-ID: <eaaf1552-f64f-40b7-a1a1-f646ec03c688@p25g2000hsf.googlegroups.com>

On May 28, 12:19?pm, mblume <mbl... at socha.net> wrote:
> Am Tue, 27 May 2008 12:37:34 -0700 schrieb Dennis Lee Bieber:
>
> > ? ?From the library reference:
> > """
> > Support for the %Z directive is based on the values contained in tzname
> > and whether daylight is true. Because of this, it is platform-specific
> > except for recognizing UTC and GMT which are always known (and are
> > considered to be non-daylight savings timezones). """
>
> > ? ?The only value that passed for me was UTC (I didn't try GMT) but...
>
> For me, only UTC, GMT, CET and CEST (Central European [Summer] Time) work.
> My time.tzname is ('CET', 'CEST').
> I think the documentation must be read that ***only***
> UTC,GMT,time.tzname work.
>
> Also, time zone names are not unique: EST can be Eastern Summer Time (US)
> as well as Eastern Summer Time (Australia).
>
> For working with time zones, I think that a module like pytzhttp://pytz.sourceforge.net/
> may be better suited.
>
> My 0.02c.
> Martin

Yeah. The timezone part of Python's time module is probably it's
weakest link. There was a pretty long thread about it about a year
ago. Maybe 2.6 or the 3.0 branch will make it a little more friendly.

Mike


From python at bdurham.com  Mon May  5 10:22:59 2008
From: python at bdurham.com (python at bdurham.com)
Date: Mon, 05 May 2008 10:22:59 -0400
Subject: Browser + local Python-based web server vs. wxPython
Message-ID: <1209997379.28463.1251467095@webmail.messagingengine.com>

I'm looking at rewriting some legacy VB applications and am pondering
which of the following techniques to use:

1. Browser based GUI with local web server (Browser +
wsgiref.simple_server) (I'm assuming that simple_server is class I want
to build from for a local web server)

-OR-

2. wxPython based GUI

My thought is that a browser/local web server setup may be more portable
to mobile environments than wxPython and may offer a way to scale a
single user offline application to a multi-user online application using
a remote vs. local web server. Some groups of users may feel more
comfortable with a browser based interface as well.

I'm looking for feedback from anyone that has pondered the same question
as well as any pros/cons or tips from anyone that has chosen the
browser/lcoal web server route.

Thanks,

Malcolm


From daveparker at flamingthunder.com  Tue May 13 13:05:38 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 10:05:38 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
Message-ID: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>

> Just to support this statement: PHP runs an order of magnitude slower than
> python. Yet a great deal (if not the majority) of dynamic sites out there
> run under PHP. All of these are unhappy customers?

The websites owners might not be unhappy, but lots of customers
complain about slow websites, so if the market is competitive then
eventually the PHP fad will die out.

For example, Slashdot recently interviewed a successful website in a
competitive market -- online newspapers -- and found that to enhance
customer happiness the New York Times uses hand-coded HTML.

"He was asked how the Web site looks so consistently nice and polished
no matter which browser or resolution is used to access it. His answer
begins: 'It's our preference to use a text editor, like HomeSite,
TextPad or TextMate, to "hand code" everything, rather than to use a
wysiwyg (what you see is what you get) HTML and CSS authoring program,
like Dreamweaver. We just find it yields better and faster results.'"
http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss

"Faster" wins in a competitive market, so if a programming language
can't deliver "faster", it is a fad that will die out.


On May 13, 10:40?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > This shows how much you don't know about customers, and their needs. A
> > customer gives a s**t about 5-10 times faster sites. They care if it is
> > *fast enough*, but beyond that they don't bother. But what *always*
> > bothers them is development time & flexibility. Because that directly
> > affects the price they pay.
>
> Just to support this statement: PHP runs an order of magnitude slower than
> python. Yet a great deal (if not the majority) of dynamic sites out there
> run under PHP. All of these are unhappy customers?
>
> Diez



From fiacre.patrick at gmail.com  Fri May 23 06:15:41 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 06:15:41 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <69nigsF3499pqU2@mid.uni-berlin.de>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
Message-ID: <4836994e$0$11625$607ed4bc@cv.net>

Diez B. Roggisch wrote:
> Jimmy schrieb:
>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>> Jimmy wrote:
>>>> Hi to all
>>>> python now has grown to a versatile language that can
>>>> accomplish tasks for many different purposes. However,
>>>> AFAIK, little is known about its ability of kernel coding.
>>>> So I am wondering if python can do some kernel coding that
>>>> used to be the private garden of C/C++. For example, can python
>>>> intercept the input of keyboard on a system level? someone told me
>>>> it's a kernel thing, isn't it?
>>> http://wiki.python.org/moin/elmer
>>
>> well, straightly speaking, how can I know a key is pressed on a system-
>> level if
>> using python?
> 
> What has that todo with kernel programming? You can use e.g. pygame to 
> get keystrokes. Or under linux, read (if you are root) the keyboard 
> input file - I've done that to support several keyboards attached to a 
> machine.
> 
> And the original question: no, python can't be used as kernel 
> programming language. Amongst other reasons, performance & the GIL 
> prevent that.
> 
> Diez

http://www.kernel-panic.it/programming/py-pf/

Of course you can code kernel routines in Python -- you are just calling 
the underlying C interface.  The GIL means you have to manage 
threadsafety on your own -- it doesn't imply kernel programming can not 
be done.

I'm not talking about writing an OS in Python (though a simple DOS-like 
OS is very possible).  Nor would I suggest writing device drivers in 
Python -- but of course you can call kernel routines and manage some 
kernel resources effectively.  Python's IPC libraries expose kernel 
functionality.


From stefan_ml at behnel.de  Thu May 29 04:48:25 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 29 May 2008 10:48:25 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
	<94950542-455f-48d8-8a07-771d3fbe14c3@g16g2000pri.googlegroups.com>
Message-ID: <483E6DD9.4030801@behnel.de>

Kalibr wrote:
> On May 29, 6:36 pm, loial <jldunn2... at googlemail.com> wrote:
>> I have a requirement to compare 2 text files and write to a 3rd file
>> only those lines that appear in the 2nd file but not in the 1st file.
>>
>> Rather than re-invent the wheel I am wondering if anyone has written
>> anything already?
> 
> You can use the cmp(x, y) function to tell if a string is similar to
> another.

Or "==".

Stefan


From skanemupp at yahoo.se  Mon May  5 10:32:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:32:15 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
Message-ID: <a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>

On 5 Maj, 16:29, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
>
>
>
> > On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> > wrote:
>
> > > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> > > Are you sure that:
>
> > > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> > > Check it with python.
>
> > > --
> > > Regards,
> > > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> > >>> import os
> > >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>
> > False
>
> > but...it is there....
>
> > >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>
> > False
>
> > does it matter if i use / or \? which si recommended?
>
> i can find .png image in the same folder and when i just change
> filename from snake.png to example1.mp3 it is false.
>
> i renamed the file once, could that have anything to do with it?

\\ or \ or / all works.


the title of the mp3 is a long number still. i mena if i go to
properties the name is example1.mpg but the title if i go to details
is stillt he old one.


From ivan.illarionov at gmail.com  Thu May  1 11:02:20 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 15:02:20 +0000 (UTC)
Subject: Signals/Slots support in Python
References: <mailman.412.1209653087.12834.python-list@python.org>
Message-ID: <fvcm1s$303g$2@news.mtu.ru>

On Thu, 01 May 2008 08:44:27 -0600, Scott SA wrote:

> Did you review this?
>     <http://pydispatcher.sourceforge.net/>
> 
> from what I understand is originally based upon this:
>     <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87056>
> 
> and subsequently integrated into this:
>     <http://djangoproject.com>

AFAIK PyDispatcher evolved into Louie project [1]. Louie has more 
features, but dispatch module inside Django is dramatically faster and is 
going to be even faster.

[1] http://pylouie.org/

-- 
Ivan


From gblais at mitre.org  Tue May  6 08:17:43 2008
From: gblais at mitre.org (Blais, Gerard C.)
Date: Tue, 6 May 2008 08:17:43 -0400
Subject: calling variable function name ?
Message-ID: <0D6AD1CAA6E85548B5F1BCFE746B725C01D11A41@IMCSRV3.MITRE.ORG>

Sure!

 

Make a dictionary:

 

                fdict = {"A":fa, "B":fb, ... }

 

                Then consider

 

                x = "A"

 

                result = fdict(x)(param1, param2)

 

                should call fa without any if's...

 

                Gerry 

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From saluk64007 at gmail.com  Mon May 26 00:43:28 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 21:43:28 -0700
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>
Message-ID: <c3f69bf60805252143x418ee017x6b61b1ea161b37e@mail.gmail.com>

There are certainly situations where data hiding is useful and perhaps a
wanted feature, but there has to be at least one place where I can use what
I want when I want to with some high and mighty designer telling me what I
should and shouldn't access.  One of the reasons they have data hiding in
something like Java, is because often you will use get/set functions that
actually do more than tell you the value of an attribute.  Python uses
properties or overloaded functions for this same mechanism.

Because of this design, you are less likely to have to change an "internal"
attribute that is relied on in user code.  Instead of telling the user that
now they have to use a different function to get a value, or changing the
name of an attribute and confusing users, you can always proxy things making
the interface stay backwards compatible.

Obviously this doesn't suit all situations, every language consideration is
going to be good in some cases and bad in others.  Otherwise it wouldn't be
a choice.  Python has made an actual choice to NOT include this feature.
Things like properties or underscore conventions etc are alternative
solutions for things that data hiding is supposed to solve.  Obviously it is
open source, so if enough people complain loud enough it could change, but
this is something that has stuck for a long time, and also a reason many
long time python developers are still using it.  Just as open source
software allows users to do new things with old programmers or revive
projects which are dead; python allows libraries to be extended easily
protecting users from designers who think they know what we want to be able
to do with their code.

But yeah, in a situation where you want the freedom to change around
internal apis, and your customers won't follow your guidelines, I feel for
you :)  I think mostly we all fear that if true data hiding were added (a la
java), that it would be abused and not limited to situations you describe.
Which is not necesarily a valid assumption, since python has been around a
long time with the philosophy it has (it IS a philosophy and guides many
other python features or lack of features), and library writers may continue
to develop the way they have previously.  All of us who complain when anyone
mentions data hiding would not use these features, and I'm fairly sure the
system libraries would remain open.
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From daveparker at flamingthunder.com  Mon May 19 23:20:28 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:20:28 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
Message-ID: <3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>

> > I <davepar... at flamingthunder.com> wrote:
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python.

> On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> That's truly disappointing.

I guess I could have stated that better.  Flaming Thunder is a labor
of love for me.  I've programmed in almost every language since
FORTRAN and Lisp, and Flaming Thunder is the language I've always
wished the others were.

For one example, I've always preferred compiled languages because
they're faster.  So Flaming Thunder is compiled.

For another example, I've always preferred languages that are English-
like because it's easier to return to your code after several years
and still know what you were doing (and it's easier for someone else
to maintain your code).

For over 5 years I've been working on Flaming Thunder unpaid and on my
own, getting the back-end up and running.  8-by-8 shotgun cross
compilers written in assembly language, that can fit all of the
libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
OS X and Windows into a single executable file that's less than 180K,
aren't written overnight.

So now that I've released it, it's extremely gratifying that people
think it's cool enough to actually pay $19 for it.  That gives me lots
of motivation (and buys enough time) for me to add features to it as
fast as possible.

To whit: you pointed out the awkwardness in Python of having to
declare a for-loop variable when you only wanted to loop a specific
number of times and didn't need the variable.  Last week, Flaming
Thunder had the same awkwardness.  If you wanted to loop 8 times:

for i from 1 to 8 do <statement>

you still had to use a variable (in this case, i).  This week, I've
added two new for-loop variations that fix that awkwardness, and also
allow you to explicitly declare an infinite loop without having to
rely on idiomatic constructs such as while-true.  Examples of the two
new variations (for-forever and for-expression-times):

Write "Fa".
For 8 times do write "-la".

For forever do
  (
  Write "Do you know the definition of insanity? ".
  Read response.
  ).


From goldnery at gmail.com  Fri May 23 09:40:13 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 06:40:13 -0700 (PDT)
Subject: WXpython Question
References: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>
	<9b765698-4d27-4e10-853e-e2c7e918d751@a1g2000hsb.googlegroups.com>
Message-ID: <5196bcc1-e840-456f-ac4d-a3841445362f@y38g2000hsy.googlegroups.com>

On May 23, 3:29 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 23, 8:24 am, Gandalf <goldn... at gmail.com> wrote:
>
> > I try to reach a specific wx StaticText element's text and to change
> > it by clicking on a button
>
> > now let's say the this is my element:
>
> > wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)
>
> > And this is my EVT_BUTTON bind function :
>
> > def OnClick(event):
>
> > which code shude i enter to change "hello" to "goodbay"?
>
> > thanks
>
> You're probably looking for SetLabel(). So if you do something like
> this to instantiate the StaticText:
>
> self.myText = wx.StaticText(panel, 15, "Hello" ,(30, 70) ,
> style=wx.ALIGN_CENTRE)
>
> Then you can change your text by adding this to your OnClick event
> handler:
>
> self.myText.SetLabel("goodbye")
>
> Have fun! And remember, there's a great wxPython mailing list too:
>
> http://www.wxpython.org/maillist.php
>
> Mike

Thanks!


From mensanator at aol.com  Sun May 18 20:45:36 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 17:45:36 -0700 (PDT)
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <a2ee841c-eb32-4841-a7d5-d4af63319a7a@m36g2000hse.googlegroups.com>

On May 18, 7:34?pm, cmoller <cmol... at dpbioventures.com> wrote:
> Hi,
>
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
>
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical.

It ought to be as long as you have the modules to
interface with Excel and know how to use them.

Although MS-Access might be a better choice than Excel
as both products have the same graphing capabilities
but Access might be a better choice for capturing data.

And Python can easily insert data into Access.

> I am not in a hurry and would approach the problem as a way
> to learn.
>
> The data I am processing is readily seen via telnet so I know it's
> there.
>
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?
>
> Thanks,
>
> Chris



From cliveswan at yahoo.co.uk  Fri May  9 06:30:05 2008
From: cliveswan at yahoo.co.uk (Clive_S)
Date: Fri, 9 May 2008 03:30:05 -0700 (PDT)
Subject: Pythonwin
Message-ID: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>

Hi

I am trying to use Python with ArcGIS.

I have installed Python 2.4. I have an icon for IDLE and command line.
I do not see Python PythonWin.

How do you install or launch pythonwin??

Thanks

Clive


From dannywebster at googlemail.com  Fri May  9 10:21:04 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 07:21:04 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<7xabizkdui.fsf@ruckus.brouhaha.com>
Message-ID: <254bd762-aa57-405b-996c-3856743267f6@l17g2000pri.googlegroups.com>

On May 9, 10:48 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> dannywebs... at googlemail.com writes:
> > I have a dictionary of which i'm itervalues'ing through, and i'll be
> > performing some logic on a particular iteration when a condition is
> > met with trusty .startswith('foo').  I need to grab the previous
> > iteration if this condition is met.  I can do something with an extra
> > var to hold every iteration while iterating, but this is hacky and not
> > elegant.
>
> You cannot rely on the elements of a dictionary being in any
> particular order (dicts are internally hash tables), so the above
> is almost certainly ont what you want.


Hi - thanks for your reply.  How about if I made the dict into a list
(of
which I have done).  How would I then reference the previous item?
Can they
be indexed?


From castironpi at gmail.com  Fri May  9 09:48:10 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 06:48:10 -0700 (PDT)
Subject: bytes1.shuffle( )
Message-ID: <19f01f35-49af-4d63-afa5-b21526818e21@k37g2000hsf.googlegroups.com>

random.shuffle( bytes1 )

if random == bytes:
   repunctuate( sentence )
else:
   random.shuffle( [ random ] )

sincerely exit, ()


From marek.rocki at wp.pl  Tue May 27 06:08:27 2008
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: Tue, 27 May 2008 03:08:27 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <db033d36-510d-4cd3-9886-acb77f5dc612@d45g2000hsc.googlegroups.com>

Since the "+=" operator won't work on methods, you have to write your
own class that will simulate dispatching multiple handlers for an
event. Maybe something like the following? I don't know, though, if it
would cooperate with PyQt nicely.

class MultiHandler(object):
	def __init__(self, owner, *initial_handlers):
		self.owner = owner
		self.handlers = list(initial_handlers)
	def __iadd__(self, handler):
		self.handlers.append(handler)
		return self
	def __call__(self, *args, **kwargs):
		for handler in self.handlers:
			handler(self.owner, *args, **kwargs)
		return None


class Calendar(object):
	def on_paint(self):
		print 'i am the default handler'

def handler1(self):
	print 'i am handler 1'

def handler2(self):
	print 'i am handler 2'


calendar = Calendar()
calendar.on_paint = MultiHandler(calendar, Calendar.on_paint)

calendar.on_paint()
calendar.on_paint += handler1
calendar.on_paint()
calendar.on_paint += handler2
calendar.on_paint()


From eliben at gmail.com  Sat May 17 11:13:25 2008
From: eliben at gmail.com (eliben)
Date: Sat, 17 May 2008 08:13:25 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
	<dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>
Message-ID: <b439e7f0-685b-46b6-b0ea-3161cc548868@m45g2000hsb.googlegroups.com>

On May 17, 3:23 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 17, 4:42 am, eliben <eli... at gmail.com> wrote:
>
>
>
> > Hello,
>
> > I'm getting into Python now after years of Perl, and as part of my
> > research I must understand how to do some common tasks I need.
>
> > I have a bunch of Windows PCs at work to which I want to distribute an
> > application I've developed on my PC. All these PCs have Python 2.5
> > installed.
>
> > If my application contains only code I've developed, I simply zip its
> > directory with .py files and send it to everyone, who can then use it
> > by running the entry-point .py file. However, what if I've installed
> > some 3rd party modules on my PC, and my application uses them (for
> > example pyparsing, PiYAML and some others) ? I don't want to manually
> > install all these packages (there may be dozens of them) on all those
> > PCs (there may be dozens of those too). What is the best method I can
> > use ? Naturally, I want all the non-standard packages my app uses to
> > be detected automatically and collected into some kind of convenient
> > distributable that is easy to pass around and run.
>
> > I'm aware of py2exe - tried it and it works fine. But it creates huge
> > executables, and I don't want to distribute those all the time. I much
> > prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> > Thanks in advance,
> > Eli
>
> You might want to check out Buildout. It allows you to run all that
> stuff in it's own virtual world, so to speak. I'm planning on playing
> with it this week.
>

I looked at its examples and I'm not sure it's what I need. It seems
useful for other cases though.

> Also, there's this site which has collected the various means of
> distributing Python apps:
>
> http://www.freehackers.org/Packaging_a_python_program
>

This page only talks about the packagers that create .exe files that
don't need Python installed.


Is there a simple way to find out which packages are used by my
script ?

Eli


From sajmikins at gmail.com  Wed May 21 01:18:59 2008
From: sajmikins at gmail.com (Simon Forman)
Date: Tue, 20 May 2008 22:18:59 -0700 (PDT)
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
Message-ID: <e530ee93-ab63-4d2a-a52f-0d8ff4895af8@a32g2000prf.googlegroups.com>

On May 20, 5:59 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> There's an occasional question here about how to get python to launch
> pdb on encountering an uncaught exception.  The answer is to look in
> some ASPN recipe and do some weird magic.  I guess that works, but
> it's another thing to remember or keep looking up when the occasion
> arises (some program crashes unexpectedly).  I find myself manually
> adding tracing instead, finding out that I did it wrong and having to
> re-launch a long-running program, etc.
>
> I'd like to propose that debug-on-exception be made into a standard
> feature that is easy to enable, e.g. with a command line option
> or with a simple pdb call immediately after the import:
>
>   import pdb
>   pdb.debug_on_exception(True)
>   ...
>
> Would there be big obstacles to this?  It would have saved me
> considerable hassle on a number of occasions.  I'm constantly
> processing large data sets that will munch along happily for hours and
> hours before hitting some unanticipated condition in the data, and it
> would be great to trap immediately rather than have to analyze the
> resulting stack dump and restart.


This is not exactly an answer to your proposal, I know, but FWIW
Ipython has exactly this capability.

Regards,
~S


From squareswallower at 1ya2hoo3.net  Thu May  8 19:52:53 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Thu, 8 May 2008 17:52:53 -0600
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
Message-ID: <g003ol$fi$1@news.xmission.com>

>> On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com>
> 
>> said:
>> 
>>> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.ne
> t>
>>> wrote:
>>> 
>>>> Hi All,
>>>>  I wrote a program that takes a string sequence and finds all the wo
> rds
>>> 
>>>> inside a text file (one word per line) and prints them:
>>>>  def anagfind(letters): 	#find anagrams of these letters
>>>> 	fin = open('text.txt')	#one word per line file
>>>> 	wordbox = []		 #this is where the words will go
>>>> 	for line in fin:
>>>> 		word = line.strip()
>>>> 		count = 0
>>>> 		for char in letters:
>>>> 			if char not in word:
>>>> 				break
>>>> 			else:
>>>> 				count += 1
>>>> 			if count == len(word):
>>>> 				wordbox.append(word)
>>>> 	return wordbox
>>>>  Now I'd like to modify the code to naturally find all anagrams insi
> de
>>> a
>>>> wordlist.  What would be the best way to do this?  Using Hints?  Is
> it
>>> 
>>>> possible to iterate over dict keys?  How can I make a dict that maps
> 
>>> 
>>>> from a set of letters to a list of words that are spelled from those
> 
>>> 
>>>> letters?  Wouldn't I need to make the set of letters a key in a dict
> ?
>>>>  As always - Thanks for helping someone trying to learn...
>>>>  Dave
>>>> 
>>>  Suggestion: for each word, sort their characters and use them as the
> 
>>> dictionary key.  If two words have the same combination of characters
> ,
>>> then they are anagrams.  For example: "edam" and "made" are anagrams
>>> because they have the letters 'a', 'd', 'e' and 'm'.
>>>  Refer "Programming Pearls" by Jon Bentley.
>>>  --
>>> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salarima
> n</
>>> a>
>> 
>> 
> 
> Your code is always going to return the same list because every word is  an
> anagram of itself.
> 
> Tip: Create a list for each dictionary key, then add a word to the list  if
> that word is not in the list.  So:
> 
> mapdic('adem') --> ["edam", "made"]
> 
> P.S. When replying, the convention is to add your response to the bottom ,
> not top of the message.
> 
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</ a>

I got it!  Thanks for all your help!!!  Please tell me what you think:

def anafind():
            fin = open('short.txt')			#one word per line
            mapdic = {}					#this dic maps letters to anagrams
            for line in fin:
                        line = line.strip()
                        templist = sorted(list(line))	#sort letters
                        newtlist = (''.join(templist)) 	#join letters
                        if newtlist not in mapdic:
                                    mapdic[newtlist] = [line]
                        if line not in mapdic[newtlist]:
                                    mapdic[newtlist].append(line)
            for value in mapdic.values():
                        if len(value) <= 1:
                                    pass
                        else:
                                    print value




From upton at virginia.edu  Fri May 16 17:22:04 2008
From: upton at virginia.edu (Dan Upton)
Date: Fri, 16 May 2008 17:22:04 -0400
Subject: can't delete from a dictionary in a loop
Message-ID: <5504f9ac0805161422r31f3a0d6sbe4e49914ade7383@mail.gmail.com>

This might be more information than necessary, but it's the best way I
can think of to describe the question without being too vague.

The task:

I have a list of processes (well, strings to execute said processes)
and I want to, roughly, keep some number N running at a time.  If one
terminates, I want to start the next one in the list, or otherwise,
just wait.

The attempted solution:

Using subprocess, I Popen the next executable in the list, and store
it in a dictionary, with keyed on the pid:
(outside the loop)
procs_dict={}

(inside a while loop)
process = Popen(benchmark_exstring[num_started], shell=true)
procs_dict[process.pid]=process

Then I sleep for a while, then loop through the dictionary to see
what's terminated.  For each one that has terminated, I decrement a
counter so I know how many to start next time, and then try to remove
the record from the dictionary (since there's no reason to keep
polling it since I know it's terminated).  Roughly:

for pid in procs_dict:
  if procs_dict[pid].poll() != None
   # do the counter updates
   del procs_dict[pid]

The problem:

RuntimeError: dictionary changed size during iteration

So, the question is: is there a way around this?  I know that I can
just /not/ delete from the dictionary and keep polling each time
around, but that seems sloppy and like it could keep lots of memory
around that I don't need, since presumably the dictionary holding a
reference to the Popen object means the garbage collector could never
reclaim it.  Is the only reasonable solution to do something like
append all of those pids to a list, and then after I've iterated over
the dictionary, iterate over the list of pids to delete?

(Also, from the implementation side, is there a reason the dictionary
iterator can't deal with that?  If I was deleting from in front of the
iterator, maybe, but since I'm deleting from behind it...)


From alan.wright at volubill.com  Wed May 21 12:37:48 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 17:37:48 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
	<roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <3KadnXuJQ5VA0qnVRVnyuAA@pipex.net>

Thanks Roy, will give it a go.

infact there is no need for any IT phone calls, I am the owner of this 
network

Very simple [bunch of clients]----[box under test]----[bunch of servers]

Now i should be able to hammer them ;)

Alan

"Roy Smith" <roy at panix.com> wrote in message 
news:roy-6BB9DC.08271421052008 at 70-1-84-166.area1.spcsdns.net...
> In article <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net>,
> "Alan Wright" <alan.wright at volubill.com> wrote:
>
>> Thanks Roy
>>
>> Any ideas how to code this child process stuff, as I said I am newbie and
>> not from a coding background
>
> The easiest thing would be to use os.system().  If you wanted to spawn 10
> child processes, you could do:
>
> import os
> for i in range(10):
>    os.system ("./child.py &")
>
> and then have child.py be a script that creates 1000 TCP connections.
>
> Keep in mind that one man's stress test is another man's denial of service
> attack.  If there are any firewalls between you and your target, they may
> restrict the number of connections you get to make (or the rate at which
> they're created).  You may also get a polite phone call from your local IT
> people asking enquiring about your activities. 




From python at bdurham.com  Wed May 14 08:54:27 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 14 May 2008 08:54:27 -0400
Subject: [ANN]  PPyGui emulator
In-Reply-To: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
Message-ID: <1210769667.16137.1253105601@webmail.messagingengine.com>

Stef,

Looks great!!

Malcolm


From bignose+hates-spam at benfinney.id.au  Mon May 12 19:03:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 13 May 2008 09:03:53 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
Message-ID: <87skwn5dly.fsf@benfinney.id.au>

Carl Banks <pavlovevidence at gmail.com> writes:

> IMHO, whether a varibale is used or not has got to be one of the least
> important things of all (in no small part because it's easily
> discernable from nearby code).

I couldn't disagree more.

If you're binding a name to a value that will never be used, you're
doing me (the reader of the code) a great favour if you indicate
clearly and concisely that this value is not intended to be referenced
anywhere else. Saving time for the reader is a very important job of
the writer of code.

> Having said that, if you do think it's most important to document
> whether something is used, I would suggest not using "_" (because
> it's conflicts with gettext conventions) or "dummy" (because it's
> misleading) for it.

Agreed.

Note, too, that the ideal answer to this is "don't bind names at all
to values that will never be used". It's only because the specifics of
Python's 'for' statement require us to do this that we are discussing
the ramifications of what to do when what Python requires of us is
actually unnecessary for our purposes.

-- 
 \          "Friendship is born at that moment when one person says to |
  `\      another, 'What! You too? I thought I was the only one!'"  -- |
_o__)                                                       C.S. Lewis |
Ben Finney


From windypower at gmail.com  Tue May 13 21:18:24 2008
From: windypower at gmail.com (WindPower)
Date: Tue, 13 May 2008 18:18:24 -0700 (PDT)
Subject: Desktop notifications on Windows
References: <0db266c1-50ad-4e01-b508-57c9a8febb4b@a22g2000hsc.googlegroups.com>
	<mailman.230.1209199953.12834.python-list@python.org>
	<60516dea-2c40-47d2-b816-8d9169399d86@c58g2000hsc.googlegroups.com>
	<50466177-f999-4952-9123-57b9c3f9b6ec@f63g2000hsf.googlegroups.com>
Message-ID: <ad339684-5f3d-419a-8e4a-d0d7439171e1@e53g2000hsa.googlegroups.com>

On Apr 26, 11:42 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> On Apr 26, 4:08 pm, WindPower <windypo... at gmail.com> wrote:
>
>
>
> > On Apr 26, 4:52 am, David <wizza... at gmail.com> wrote:
>
> > > On Sat, Apr 26, 2008 at 4:41 AM,  <windypo... at gmail.com> wrote:
> > > > I'm looking for a way to implement desktop notifications (much like an
> > > >  instant messaging program or a mail notifier) within my Python
> > > >  application, on Windows only (no Gtk/Galago, please). I need no more
> > > >  than a simple text-based notification, which should be clickable and
> > > >  have a timeout, nothing else. I do not want to use Windows's "balloon
> > > >  tips", either. Any suggestions?
> > > >  --
>
> > > You could use Tkinter, which comes with Python.
>
> > The problem is that Tkinter cannot (I haven't looked at it in details,
> > so correct me if I'm wrong) create notifications the way I want them;
> > it can only create standard dialogs or top-level dialogs, both of
> > which steal the focus of other applications, while I want these
> > notifications not to interfere with anything (and possibly not be
> > displayed if an application is already running in fullscreen).
>
> wxPython can do this. They have a wx.PopupWindow that does this and
> comes with wxPython or you can use the more advanced custom Toasterbox
> widget that I found here:
>
> http://xoomer.alice.it/infinity77/main/freeware.html#toasterbox
>
> I've used both, but the latter gives more control of the "look &
> feel".
>
> Hope that helps!
>
> Mike

Thanks, this is exactly what I was looking for!


From inhahe at gmail.com  Tue May 13 14:56:28 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 14:56:28 -0400
Subject: list index out of range
References: <mailman.1068.1210704380.12834.python-list@python.org>
Message-ID: <dulWj.65238$%15.28030@bignews7.bellsouth.net>

random.randint(x,y) returns a random integer between _and including_ x and 
y, so randint(0, len(deck)) might return len(deck) and since python's 
indices start at 0, the maximum index is len(deck)-1.

rather than using randint(0,len(deck)-1) you could just do
card = random.choice(deck)
HAND.append(card)
deck.remove(card)

although it would be more efficient to do remove card by index which then 
gets us back to using randint, like this

i = random.randint(0, len(deck)-1)
HAND.append(deck[i])
del deck[i]

but i guess speed probably isn't a big factor here

also you could have done
i=random.randint(0, len(deck)-1)
HAND.append(deck.pop(i))






"Georgy Panterov" <gpanterov at yahoo.com> wrote in message 
news:mailman.1068.1210704380.12834.python-list at python.org...
I am a relatively new python user. I am writing an economic simulation of a 
card-game. The simulation runs fine for a few iteration but then it gives an 
error of "list index out of range."

The strange thing is that it will sometimes run for 10 iterations sometimes 
for only a few and sometimes won't run at all (seemingly arbitrary).
Here is some of the code:

for _ in range(100):
    handA=deal_hand(DECK) #deals 2 'hole' cards from a DECK
    handB=deal_hand(DECK)
    print handA
    print handB
    deal_flop(handA,handB,DECK) #appends 3 cards to handA and handB
    deal_current(handA,handB,DECK) #appends one more card
    deal_rake(handA,handB,DECK) #appends one more card
    DECK.extend(list(set(handA+handB))) #returns the cards to the DECK
    print winner(handA,handB) #returns 0-draw 1 -playerA win, 2-playerB win

The error message is :

['08C', '10H']
['07S', '03C']
--------
['06C', '02H']
['04D', '12S']
--------
['11H', '14S']
['06S', '04S']
--------

Traceback (most recent call last):
  File "G:\Other Stuff\POKER4.py", line 267, in <module>
    handB=deal_hand(DECK)
  File "G:\Other Stuff\POKER4.py", line 13, in deal_hand
    HAND.append(deck[i])
IndexError: list index out of range

In this case it ran 3 times. It will sometimes run for up to 9-10 times. It 
seems to be arbitrary but I can't get it to run more than 12 times.

Here is the code for the --deal_***-- functions:

def deal_hand(deck):
    HAND=[]
    for _ in range(2):
        i=random.randint(0,len(deck)) #produces a random card from the deck
        HAND.append(deck[i]) # appends the card to the players' hand list
        deck.remove(deck[i]) #removes the card from the deck
    return HAND

def deal_flop(hand1,hand2,deck):
    for _ in range(3):
        i=random.randint(0,len(deck))

        hand1.append(deck[i])
        hand2.append(deck[i])
        deck.remove(deck[i])

I would appreciate any help with this
Thanks
George


Send instant messages to your online friends http://uk.messenger.yahoo.com 




From Scott.Daniels at Acm.Org  Sun May 25 16:56:01 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 13:56:01 -0700
Subject: raising an exception when multiple inheritance involves same
	baseThank
In-Reply-To: <0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
References: mailman.1567.1211722656.12834.python-list@python.org
	<0932331b-126f-494e-b946-9e6471d31dfa@x35g2000hsb.googlegroups.com>
Message-ID: <EJKdnfZic_HUTaTVnZ2dnUVZ_uGdnZ2d@pdx.net>

Here are some tweaks on both bits of code:

Paul McGuire wrote:
> On May 25, 8:37 am, Michael Hines <michael.hi... at yale.edu> wrote:
...
>>     m = False
>>     for b in bases :
>>       if hasattr(b, '__mro__'):
>>         for bb in b.__mro__ :
>>           if bb == MetaHocObject.ho :
>>             if m == True:
>>               raise Exception("Inheritance of multiple HocObject not
>> allowed")
>>             m = True
     m = []
     for b in bases:
         if hasattr(b, '__mro__'):
             if MetaHocObject.ho in b.__mro__:
                 m.append(b)
     if m:
         raise TypeError('Multiple Inheritance of HocObject by %s '
                 'not allowed.' % ', '.join(b.__name__ for b in m))

Rationale:
   (1) "if m == True" is always a flag for trouble.
   (2) When you detect a problem and raise an exception, provide
       information about what was wrong.
   (3) There is no need to report error conditions early.  Accumulate
       information and complain (if it can be done without much extra
       code) exhaustively because a failure case should not be in the
       performance-limiting section anyway.

> Here's a more general version of your testing code, to detect *any*
> diamond multiple inheritance (using your sample classes).
> 
> for cls in (A,B,C,D):
>     seen = set()
>     try:
>         bases = cls.__bases__
>         for b in bases:
>             if hasattr(b,"__mro__"):
>                 for m in b.__mro__:
>                     if m in seen:
>                         raise Exception("diamond multiple
> inheritance")
>                     seen.add(m)
>     except Exception, e:
>         print cls,"has diamond MI"
>     else:
>         print cls,"is ok"

Warning: any two "new-style" classes as parents are necessarily involved
in diamond inheritance (because object will be a common superclass).
I'd make sure you produce (or can produce) all common super-classes,
so you can filter the list to what you want.  Maybe something like this:
     def diamond_points(class_):
         seen = dict((b, set([class_])) for b in class_.__bases__)
         for b in class_.__bases__:
             if hasattr(b, "__mro__"):
                 for m in b.__mro__:
		    if b != m:
                         seen.setdefault(m, set()).add(b)
         for subclass, sources in seen.items():
             if len(sources) == 1:
                 seen.pop(subclass)
         return seen

Then you can do a test like:
     trouble = diamond_points(class_)
     if trouble and (len(trouble) > 1 or object not in trouble):
         # you know you have a problem
         # If you only have forbidden multi-roots, you could
         #  test if set(trouble) & forbidden_multi_parents: ...
         if object in trouble:
             trouble.pop(object)  # Avoid simply new-style classes
         for common_ancestor, progeny in trouble.items():
             print common_ancestor.__name__, 'used by:', ' & '.join(
                                     child.__name__ for child in progeny)


--Scott David Daniels
Scott.Daniels at Acm.Org


From bockman at virgilio.it  Thu May 15 06:41:31 2008
From: bockman at virgilio.it (bockman at virgilio.it)
Date: Thu, 15 May 2008 03:41:31 -0700 (PDT)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <905611fd-e5c4-478f-a0bd-417ccc5fe0a1@d77g2000hsb.googlegroups.com>

On 15 Mag, 12:08, Gabriel <g... at dragffy.com> wrote:
> Hi all
>
> Just wondering if someone could clarify this behaviour for me, please?
>
> >>> tasks = [[]]*6
> >>> tasks
>
> [[], [], [], [], [], []]>>> tasks[0].append(1)
> >>> tasks
>
> [[1], [1], [1], [1], [1], [1]]
>
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
>
> I got this example from page 38 of Beginning Python.
>
> Regards
>
> Gabriel

The reason is that
    tasks = [[]]*6
creates a list with six elements pointing to *the same* list, so when
you change one,
it shows six times.

In other words, your code is equivalent to this:
>>> a = []
>>> tasks = [a,a,a,a,a,a]
>>> a.append(1)
>>> tasks
[[1], [1], [1], [1], [1], [1]]


Insead, to create a list of lists, use the list comprehension:

>>> tasks = [ [] for x in xrange(6) ]
>>> tasks[0].append(1)
>>> tasks
[[1], [], [], [], [], []]
>>>

Ciao
-----
FB


From tgrav at mac.com  Sat May 31 10:11:13 2008
From: tgrav at mac.com (Tommy Grav)
Date: Sat, 31 May 2008 10:11:13 -0400
Subject: SMS sending and receiving from website?
In-Reply-To: <2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
	<6abq0uF36n019U1@mid.individual.net>
	<5d949166-5112-4a7a-91c3-77ccdd7ca695@j22g2000hsf.googlegroups.com>
	<2e1e103c-b436-445e-ad23-da735c0d8345@f36g2000hsa.googlegroups.com>
Message-ID: <BA072DEE-4111-4132-9114-1B0F182A530E@mac.com>


On May 31, 2008, at 10:01 AM, globalrev wrote:
> also, lets say i want to send a SMS to my own phone from the internet.
> how would i do that?

While I have seen services that allow you to do that (it has been  
awhile),
i think you need to contact a service provider if you want to do this on
any scale beyond a few messages per month. This is a service that is
going to cost you to implement.

Cheers
   Tommy


From mcknight0219 at gmail.com  Tue May 13 06:16:14 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Tue, 13 May 2008 03:16:14 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
	<d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com> 
	<g0b52s$53r$1@news.mtu.ru>
	<mailman.1026.1210668125.12834.python-list@python.org>
Message-ID: <db74e34c-b304-4ab0-befe-7bd2c9c70493@t12g2000prg.googlegroups.com>

On May 13, 4:41 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 01:22:52 -0300, Ivan Illarionov
> <ivan.illario... at gmail.com> escribi?:
>
>
>
> > On Mon, 12 May 2008 20:29:46 -0700, George Sakkis wrote:
> >>> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com>
> >>> > wrote:
>
> >>> > >  can anyone tell me, in python, how to obtain some information of
> >>> > >  a running program?
> >>> > >  paticularly, if i am playing some music in audacious or other
> >>> > >  media player, how can i get the the name and some other info of
> >>> > >  current playing song? It seems that audicious doesn't output on
> >>> > >  run-time --
>
> >> Your best bet is if the *specific* program you're interested in (e.g.
> >> audacious) exposes this information programmatically in some way. It's
> >> up to the developers of this application if and how they choose to do
> >> it. Even if they do it, there's no requirement that the same API will
> >> work for any other program of the same category, unless there is some
> >> popular industry standard that most applications implement.
>
> > George, have you read my post in this thread? What OP wants is actually
> > possible and it's quite easy. X server is the "superprogram" that knows
> > the names of all GUI window titles.
>
> That relies on the fact that audacious (or whatever player used) actually
> includes the song name as part of its window title. As G. Sakkis said,
> this depends on the specific program used. And what about "some other info
> of current playing song"?
>
> --
> Gabriel Genellina

since it's for lyrics displaying. you have to know time of where it is
playing,
 the control of user, etc.


From kyosohma at gmail.com  Sat May 17 08:23:54 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Sat, 17 May 2008 05:23:54 -0700 (PDT)
Subject: Distributing applications that use 3rd party modules
References: <8728ad1c-2b4a-47db-aeda-8d2416b6bdc8@i76g2000hsf.googlegroups.com>
Message-ID: <dbcaa278-59e8-491e-9aed-bc8c62a6e306@27g2000hsf.googlegroups.com>

On May 17, 4:42?am, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I'm getting into Python now after years of Perl, and as part of my
> research I must understand how to do some common tasks I need.
>
> I have a bunch of Windows PCs at work to which I want to distribute an
> application I've developed on my PC. All these PCs have Python 2.5
> installed.
>
> If my application contains only code I've developed, I simply zip its
> directory with .py files and send it to everyone, who can then use it
> by running the entry-point .py file. However, what if I've installed
> some 3rd party modules on my PC, and my application uses them (for
> example pyparsing, PiYAML and some others) ? I don't want to manually
> install all these packages (there may be dozens of them) on all those
> PCs (there may be dozens of those too). What is the best method I can
> use ? Naturally, I want all the non-standard packages my app uses to
> be detected automatically and collected into some kind of convenient
> distributable that is easy to pass around and run.
>
> I'm aware of py2exe - tried it and it works fine. But it creates huge
> executables, and I don't want to distribute those all the time. I much
> prefer a zipped directory of .py scripts that takes some 10s of KBs.
>
> Thanks in advance,
> Eli

You might want to check out Buildout. It allows you to run all that
stuff in it's own virtual world, so to speak. I'm planning on playing
with it this week.

Also, there's this site which has collected the various means of
distributing Python apps:

http://www.freehackers.org/Packaging_a_python_program

Hope that helps!

Mike


From sjmachin at lexicon.net  Thu May 15 12:40:37 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 09:40:37 -0700 (PDT)
Subject: How do I use the unpack function?
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
Message-ID: <d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>

On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> Marlin Rowley wrote:
> > All:
>
> > I've got a script that runs really slow because I'm reading from a
> > stream a byte at a time:
>
> > // TERRIBLE
> > for y in range( height ):
> >         for color in range(4):
> >             for x in range( width ):
> >                 pixelComponent = fileIO.read(4)
> >                 buffer = unpack("!f",pixelComponent)  << unpacks ONE

[snip]
Perhaps the OP might be able to use the Python Imaging Library (PIL)
instead of reinventing an image-file handler.


From kyosohma at gmail.com  Wed May  7 10:52:23 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 07:52:23 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <92d490e1-a8fe-4050-887b-d83cae4b8378@24g2000hsh.googlegroups.com>

On May 7, 9:08?am, "parag_p... at hotmail.com" <parag_p... at hotmail.com>
wrote:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
>
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python

There are lots of bigger projects to work on. Check out Spambayes, the
original bittorrent, or Zope for some of the more well known ones.

Mike


From maxm at mxm.dk  Thu May  1 14:15:55 2008
From: maxm at mxm.dk (Max M)
Date: Thu, 01 May 2008 20:15:55 +0200
Subject: tool to calculate color combination
In-Reply-To: <48193734.4010108@al.com.au>
References: <48193734.4010108@al.com.au>
Message-ID: <fvd1cr$nhn$1@ger.gmane.org>

Astan Chee skrev:
> Hi,
> I was just wondering if there is a tool/script in python that allows me 
> to do color calculations; specifically, when I add them.

There is the colorsys module which I have used in this class:




from colorsys import rgb_to_hls, hls_to_rgb
import binascii
from types import StringType, TupleType, ListType, IntType, FloatType
from math import modf

class RGB:
     """ Makes it easier to work with rgb colors """

     def __init__(self, color):
         # set color value
         self.color = self.any2color(color)

     def any2color(self, color):
         """
         Takes a number of color formats and returns a sequence of 3 
floats:
         (r,g,b)
         Some legal formats for pure blue are: 
'0x0000FF','#0000FF','0000FF',
         [0.0, 0.0, 1.0], [0, 0, 255], (0, 0.0, 'FF') and ('0', '0', 'f').
         Mixed types are allowed in sequences.
         """
         # it must be a hex, so convert to sequence of hex values
         if isinstance(color, StringType):
             # handle hex value
             if color[:2].lower() == '0x': color = color[2:]
             elif color[0] == '#': color = color[1:]
             color = (color[:2], color[2:4], color[4:])
         # convert sequence to floats
         color_result = []
         a = color_result.append
         for part in color:
             # what type is the part?
             if isinstance(part, StringType): # hex part
                 if len(part) == 1:
                     part = '0%s' % part
                 b = binascii.a2b_hex(part)
                 a(ord(b[0])/255.0)
             elif isinstance(part, IntType): # int part
                 a(part/255.0)
             elif isinstance(part, FloatType): # float part
                 a(part)
         return color_result


     def __str__(self):
         "Returns string representation of color (same as html_hex)"
         return self.html_hex()


     def r(self):
         return self.color[0]

     def g(self):
         return self.color[1]

     def b(self):
         return self.color[2]


     def bytes(self):
         """
         Takes a sequence of colors in floats, and returns a sequence of 
int in
         the range 0-255
         """
         return map(lambda x: int(x*255), self.color)


     def html_hex(self):
         """
         Returns the color in a hex string representation of the form 
'#0000FF'
         """
         r,g,b = self.color
         return '#%02X%02X%02X' % (int(r*255),int(g*255),int(b*255))


     def _cAdd(self, x, y):
         "Private method! Cirkular add x+y so value allways in 0.0-1.0 
range"
         fractional, integer  = modf(x + y)
         if not fractional and integer: # special case 1.0
             return 1.0
         return abs(fractional)
         # wrong result for negative values!


     def hls_delta(self, dh, dl, ds):
         """
         Returns a Color object same as self, but adjusted by delta hls
         values
         """
         h,l,s = rgb_to_hls(*self.color)
         nh = self._cAdd(h, dh)
         nl = l + dl
         if nl > 1.0: nl = 1.0
         if nl < 0.0: nl = 0.0
         ns = s + ds
         if ns > 1.0: ns = 1.0
         if ns < 0.0: ns = 0.0
         return RGB(hls_to_rgb(nh, nl, ns))


     def change_ls(self, new_l=None, new_s=None):
         """
         Returns a Color object same as self, but with new lightness and
         saturation levels
         """
         h,l,s = rgb_to_hls(*self.color)
         if new_l == None:
             new_l = l
         if new_s == None:
             new_s = s
         return RGB(hls_to_rgb(h, new_l, new_s))


     def spacer(self, transparent=None):
         """
         Creates a 1x1 GIF89a of color. If no color it returns a 
transparent gif
         Should probably not be in this module?
         """
         template = [71, 73, 70, 56, 57, 97, 1, 0, 1, 0, 128, 0, 0, 255, 
255,
         255, 0, 0, 0, 33, 249, 4, 1, 0, 0, 0, 0, 44, 0, 0, 0, 0, 1, 0, 
1, 0,
         0, 2, 2, 68, 1, 0, 59]
         if not transparent:
             template[13:16] = self.bytes() # set rgb values
             template[22] = 0 # remove transparency
         return ''.join(map(chr, template))



if __name__=='__main__':

     red     = (255, 0, 0)
     green   = (0.0, 1.0, 0.0)
     blue    = (0.0, 0.0, 1.0)
     yellow  = '#ffff00'

     col = RGB(blue)
     print col.color
     print col.bytes()
     print col

     brighter = col.change_ls(0.0, 0.0)
     print 'brighter:',brighter

#    complementary = col.hls_delta(0.50, 0.0, 0.0)
#    print complementary


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From artasis at gmail.com  Mon May  5 06:06:35 2008
From: artasis at gmail.com (artasis at gmail.com)
Date: Mon, 5 May 2008 03:06:35 -0700 (PDT)
Subject: use php in python httpservers
Message-ID: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>

Hi, that is my task:
I need to create python webserver-like extension(dll) which will run
php and python scripts as plugins.
I have no problems with dll creating and run python scripts, but I
cannot understand how to run php(CLI is not a solution).
Is there a way to solve this problem? I've thought to implement php to
HTTPServer-like python module, but as I see it's impossible. Solutions
with creating intermediate C-based module is allowed, but better
without them :).
AFAIK, php5ts.dll is that what I must use but how integrate it to
python webserver? that is a question


From sven.siegmund at gmail.com  Mon May 12 13:38:25 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Mon, 12 May 2008 10:38:25 -0700 (PDT)
Subject: Cannot run Python 3.0a5 )-:
Message-ID: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>

Hi, I just tried to install Python 3.0a5 an another Windows PC. I did
what I have done yesterday at home:

1. Downloaded the daily snapshot http://svn.python.org/snapshots/msi/python-3.0.14011.msi
2. Installed to C:\Python30
3. Added C:\Python30 to the Path environment for all users.

when I run python from the command line, it says: The system cannot
execute the specified program.

I don't understand this.

S.


From andrei.zavidei at gmail.com  Fri May  2 10:18:49 2008
From: andrei.zavidei at gmail.com (andrei.zavidei at gmail.com)
Date: Fri, 2 May 2008 07:18:49 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
	<mailman.444.1209712086.12834.python-list@python.org>
Message-ID: <4995d686-881d-4526-9095-3162cbfc4b49@z72g2000hsb.googlegroups.com>

On May 2, 10:07?am, bvidinli <bvidi... at gmail.com> wrote:
> i also asked same question in this list last week.
> i foundhttp://www.cherrypy.org/to be most suitable for me.
> it is basic, easy, pure...
> it contains its own webserver, very easy to start.
>
> others have many framworks, structures, classes many many..
> i wanted a pure web programming system , i found cherrypy.
>
> see you.
>
> 2008/5/2 jmDesktop <needin4mat... at gmail.com>:
>
> > I have been to the main python site, but am still confused. ?I have
> > ?been using .net, so it may be obvious how to do this to everyone
> > ?else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> > ?but I would like to know how to create web pages without these. ?If I
> > ?have mod_python or fastcgi on apache, where do I start? ?I don't have
> > ?clue where to begin to create a web page from scratch in python. ?I am
> > ?sure I will want to access database, etc., all the "normal" stuff, I
> > ?just want to do it myself as opposed to the frameworks, for learning.
>
> > ?Thank you for any help.
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --
> ?.Bahattin Vidinli
> Elk-Elektronik M?h.
> -------------------
> iletisim bilgileri (Tercih sirasina gore):
> skype: bvidinli (sesli gorusme icin,www.skype.com)
> msn: bvidi... at iyibirisi.com
> yahoo: bvidinli
>
> +90.532.7990607
> +90.505.5667711

I agree. Try cherrypy. I was able to write simple issue tracking
system for my project with basic web interface within 2 weeks.
Prior to this I had no web development experience at all. It was
really easy with cherrypy to start.


From lists at cheimes.de  Sat May 17 18:22:13 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sun, 18 May 2008 00:22:13 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net>	<e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>	<g0nhaf$ee7$1@ger.gmane.org>
	<e76aa17f0805171435r4b450feeqef968c373c6babe7@mail.gmail.com>
Message-ID: <482F5A95.3000209@cheimes.de>

Matthieu Brucher schrieb:
> Even if you compile Python 2.5 with VS2008, VS2003 is used for the
> extensions, AFAIR. I didn't try Python 2.6 because I only have Visual C++
> Express 2008.

You can compile 2.6 and 3.0 with the free Express Edition just fine.

Christian



From deets at nospam.web.de  Tue May 20 10:32:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:32:47 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
	<874p8tawqs.fsf@mulj.homelinux.net>
Message-ID: <69g5pfF2v4102U1@mid.uni-berlin.de>

Hrvoje Niksic wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> bearophileHUGS at lycos.com wrote:
>>
>>> John Salerno:
>>>> What does everyone think about this?
>>> 
>>> The Example 2 builds a list, that is then thrown away. It's just a
>>> waste of memory (and time).
>>
>> No, it doesn't.
> 
> This line:
> 
>     [new.append(c) for c in s if c not in new]
> 
> ...throws away the list built by the comprehension itself, composed of
> None values (returned by append).

Ah. You are right of course.

Diez


From mnikhil at gmail.com  Thu May 22 15:13:04 2008
From: mnikhil at gmail.com (Nikhil)
Date: Fri, 23 May 2008 00:43:04 +0530
Subject: Using MySQLdb to select into the local file
Message-ID: <g14gk0$ntt$1@registered.motzarella.org>

I am using the MySQLdb python module. I have a table named 'testing' 
with few columns, under the 'test' database, what is hosted on a remote 
mysql server.

I want to run the following query to get a comma-seperated information 
from the table


LOCK TABLES foo READ;
SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt'
   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
   LINES TERMINATED BY '\n'
   FROM 'testing'
UNLOCK TABLES;

..the query is running fine, but what I am noticing is /tmp/result.txt 
is getting created locally on a mysqld running machine but not on the 
client(python program) using the MySQLdb module.
I am wondering if anyone has gone through this before and made some 
arrangements to iterate over the data but get the /tmp/result.txt 
generated locally on the client machine?

On the local or the server file, from 
http://dev.mysql.com/doc/refman/5.0/en/select.html

---
  The SELECT ... INTO OUTFILE statement is intended primarily to let you 
very quickly dump a table to a text file on the server machine. If you 
want to create the resulting file on some client host other than the 
server host, you cannot use SELECT ... INTO OUTFILE. In that case, you 
should instead use a command such as mysql -e "SELECT ..." >  file_name 
to generate the file on the client host.
---

So, what is the equivalent of using '-e' mysql commandline option in the 
MySQLdb python module?

I am sorry if this is supposed to go to only MySQL, but not really sure 
so copying the relevant assumed.

Thanks,
Nikhil


From maxm at mxm.dk  Mon May 26 06:43:03 2008
From: maxm at mxm.dk (Max M)
Date: Mon, 26 May 2008 12:43:03 +0200
Subject: b64encode and unicode problem
In-Reply-To: <483A8D9F.3080104@arimaz.com>
References: <483A8D9F.3080104@arimaz.com>
Message-ID: <483A9437.4010505@mxm.dk>

Gabriel Rossetti skrev:
> Hello everyone,
> 
> I am trying to encode a string using b4encode and I get the following 
> error :
> 
>  >>> b64encode(u"Salut Pierre, comment ?a va?")
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>    encoded = binascii.b2a_base64(s)[:-1]
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
> position 22: ordinal not in range(128)
> 
> If I remove the "u" infront of the string, it works. The problem is that 
> I in my program, the string is given to me un unicode/utf-8. I tried 
> several things, but I still get it, How can I get it to work, anybody 
> have any idea?

I have written about it here:

http://mxm-mad-science.blogspot.com/2008/03/python-unicode-lessons-from-school-of.html

The reason/solution for your problem is mentioned somewhere below the 
middle.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From aahz at pythoncraft.com  Sun May 25 16:32:03 2008
From: aahz at pythoncraft.com (Aahz)
Date: 25 May 2008 13:32:03 -0700
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
Message-ID: <g1cic3$3e9$1@panix3.panix.com>

In article <mailman.1539.1211660262.12834.python-list at python.org>,
David  <wizzardx at gmail.com> wrote:
>
>Seriously, 10 hours of testing for code developed in 10 hours? What
>kind of environment do you write code for? This may be practical for
>large companies with hordes of full-time testing & QA staff, but not
>for small companies with just a handful of developers (and where you
>need to borrow somone from their regular job to do non-developer
>testing). In a small company, programmers do the lions share of
>testing. For programmers to spend 2 weeks on a project, and then
>another 2 weeks testing it is not very practical when they have more
>than one project.

You must have poor project management/tracking.  You WILL pay the cost
of testing, the only question is when.  The when does have an impact on
other aspects of the development process.

Speaking as someone who started in my current job four years ago as the
third developer in a five-person company, I believe that your claim about
the differences between small companies and large companies is specious.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From larzluv at hotmail.com  Sun May 11 23:32:16 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 20:32:16 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
Message-ID: <3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com>

On May 10, 11:41 pm, Larry Hale <larz... at hotmail.com> wrote:
> I've heard tell of a Python binding for libmagic (file(1) *nixy
> command; seehttp://darwinsys.com/file/).  Generally, has anybody
> built this and worked with it under Windows?
>
> The only thing I've been able to find is the python-magic module athttp://hupp.org/adam/hg/python-magic/.
>
>     [1] Is this "THE" python-magic module.  (It seems to be to me, but
> obviously I don't know. :)
>
>     [2] Has anybody been able to build THIS version under Windows?
>
> I've gotten as far as completing the "setup.py install" process.
> (After many troubles; I'll post the top-to-bottom HowTo-like info if/
> when I ever get it to work.  :)
>
> At this point, there -is- a "magic" module that can be imported
> (attempted-to, that is), but it fails.
>
> If I go to a cmd window, run the Py interpreter, and do "import magic"
> I get:
>
>     [1] an error pop-up (Windows window, which is blocking [as opposed
> to "non-blocking", not "obscuring", though it does that, too] the cmd
> window):
>
>         (X) This application has failed to start because magic1.dll
> was not found.  Re-installing the application may fix this problem.
> [OK]
>
>     [2] then, within the interpreter, I get:
>
>         Traceback (most recent call last):
>           File "<stdin>", line 1, in <module>
>           File "build\bdist.win32\egg\magic.py", line 2, in <module>
>           File "build\bdist.win32\egg\cmagic.py", line 7, in <module>
>           File "build\bdist.win32\egg\_cmagic.py", line 7, in <module>
>           File "build\bdist.win32\egg\_cmagic.py", line 6, in
> __bootstrap__
>         ImportError: DLL load failed: The specified module could not
> be found.
>
> I'm using Python 2.5 on Windows XP Pro.  I've got CYGWIN installed
> (more info can be provided if necessary) for a copy of file.exe (and
> libmagic.a @ 357KB and libmagic.dll.a @ 25KB in C:\cygwin\lib).  I
> also have GNUWin32, also for file.exe alternatively (and
> libmagic.dll.a @ ~ 8KB in C:\Program Files\GnuWin32\lib).
>
> magic.py in C:\Program Files\Python25\Lib\site-packages\magic-0.1-
> py2.5-win32.egg imports cmagic.py (also in this egg), which imports
> _cmagic.py, which has the following:
>
>     def __bootstrap__():
>        global __bootstrap__, __loader__, __file__
>        import sys, pkg_resources, imp
>        __file__ =
> pkg_resources.resource_filename(__name__,'_cmagic.pyd')
>        del __bootstrap__, __loader__
>        imp.load_dynamic(__name__,__file__)
>     __bootstrap__()
>
> Now I *presume* my problem (at this point) is that I need to have
> libmagic named as "magic1.dll" -wherever- this module is looking for
> it.  I'm just not sure, let alone if this is true, WHERE Python/
> modules expect to find such things.
>
> Also, which version(s)/file(s) should be placed where, or...??
>
> Thanks for any/all help/pointers.  I apologize up-front if I left out
> any pertinent info; I'm paranoid about putting in too much (and some
> that may be worthless) already...  :)
>
> Cheers,
> Larry Hale

ALSO: I've even tried putting the 4 "magic" files INTO the .egg
file... still no-go.  :/


Thanks, all!
-Larry


From bruno.desthuilliers at gmail.com  Fri May 16 17:38:30 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:38:30 -0700 (PDT)
Subject: can't delete from a dictionary in a loop
References: <mailman.1246.1210972944.12834.python-list@python.org> 
	<x%mXj.46799$3v1.5089@bignews3.bellsouth.net>
	<fc4e0529-fbba-4c11-8e9b-8eafdb54d926@x35g2000hsb.googlegroups.com>
Message-ID: <43a76233-01cd-4350-b486-cf3e1b32d9dd@k13g2000hse.googlegroups.com>

On 16 mai, 23:34, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 16 mai, 23:28, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com> wrote:
>
>
> > Dan Upton wrote:
> > > for pid in procs_dict:
(snip)
> >    for pid in procs_dict.keys():
>
> I'm afraid this will do the same exact thing. A for loop on a dict
> iterates over the dict keys, so both statements are strictly
> equivalent from a practical POV.

Hem. Forget it. I should think twice before posting - this will
obviously make a big difference here.  Sorry for the noise.



From nick at craig-wood.com  Thu May 22 11:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 10:30:07 -0500
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>
Message-ID: <slrng3b383.iqd.nick@irishsea.home.craig-wood.com>

Damon Getsman <dgetsman at amirehab.net> wrote:
> PHP has great support for accessing a MySQL database,

Actually I'd say PHP's mysql support is lacking a very important
feature.  mysql_query() doesn't support parameters (or placeholders,
usually '?')  which means that unless you use
mysql_real_escape_string() on all user input you are leaving yourself
wide open for SQL injection attacks.

With all the other non-PHP mysql programming I've done you use
parameters for all user input and you don't have to worry.

It is not a big deal, but I've had it drummed into me to always use
parameters for user input and I was really suprised PHP didn't have
them.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From castironpi at gmail.com  Tue May 13 10:39:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:39:24 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com> 
	<dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com> 
	<3aacfe8b-f00d-494f-845f-488beeb5b2ef@m44g2000hsc.googlegroups.com>
Message-ID: <864204d0-2c56-4d0c-ae91-719793758086@e39g2000hsf.googlegroups.com>

On May 13, 9:31?am, castiro... at gmail.com wrote:
> On May 13, 9:08?am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
>
> > > Giuseppe Ottaviano wrote:
> > > > def ichain(seq):
> > > > ????????for s in seq:
> > > > ????????????????for x in s: yield x
>
> > > > (which is often useful and I don't think it has been included in ?
> > > > itertools) you can iterate lazily on the file:
>
> > > Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> > > Peter
>
> > Can you color the help manual with very fine shades of off-white to
> > ease reading? ?I was thinking a few pixels shy of red of white to
> > accentuate what are the class methods and which are not. ?I also have
> > an argument that net readability would decrease, but the sample sizes
> > on that kind of metric are a little brinky with privacy fears around
> > where I'm from. ?I just try to make Tron rings.
>
> I am also me the that's the readability of legibles on color of light
> the lighterers.
>
> More simply, that could vary widely though, and I've heard of a
> 'fovea'.- Hide quoted text -
>
> - Show quoted text -

Furthermore "Optical Sensors and Sensing Systems for Natural Resources
and Food Safety and Quality" from wixipedia omits sex.  for Food and
Sex.  I think concepts are related to perceptions.  food.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:19:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:19:45 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <mailman.737.1210231391.12834.python-list@python.org>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>	<mailman.716.1210187999.12834.python-list@python.org>	<40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
Message-ID: <48240921$0$7184$426a74cc@news.free.fr>

Daniel Marcel Eichler a ?crit :
> Am Donnerstag 08 Mai 2008 00:12:26 schrieb 
> bruno.desthuilliers at gmail.com:
> 
>> very often sees do-nothing catch-all try/catch blocks in Java - which
>> is way worse than just letting the exception propagate. I find all
>> this totally pointless, because there's just no way for a compiler to
>> check if your code is logically correct.
> 
> But it's enough if the called method exists and returns the correct 
> type. At least it prevents a crash.

Then providing an appropriate default in the base class is enough too.

>>> Interfaces work at
>>> compile-time, while method-stubs raise at their first call, so in
>>> worst case, never.
>> And then ? If it's never called, why bother implementing it ?
> 
> You never can't say when it's called at least, that's the point. 

Either the method is actually called somewhere and you'll now it pretty 
soon, or it isn't and you don't care.

>>> That's the point. Interfaces garantee that a duck is a duck, an not
>>> only a chicken that quack.
>> Who cares if it's a chicken as long as it quacks when you ask her to
>> ? Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)
> 
> Ducks can also swim and fly.  And if you need a really duck,

If you're code expects something that quacks, swims and flies, anything 
that quacks, swims and flies is ok. You just don't care if it's a duck 
or a flying whale with a quacking device tied to it.

> but have 
> onyl a chicken while the coder was to bored to make one...

Then the coder have a nice traceback, and it's not *your* problem - as 
long as the expectations are clearly documented, it's the user's (ie: 
coder) duty to provide something that fullfil the expectations.

> Of course, in the practical world that all doesn't  matter. But in the 
> theoretical world of the big coding farms, called business, that's one 
> cornerstone of success, in the tinking of managers and so.

Sorry, I live in a very practical world - and we're by no mean running 
out of business here...



From software at ginstrom.com  Sun May 25 11:39:29 2008
From: software at ginstrom.com (Ryan Ginstrom)
Date: Mon, 26 May 2008 00:39:29 +0900
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be><af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com><roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net><69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <00e301c8be7d$857fe500$0203a8c0@MOUSE>

> On Behalf Of Roy Smith
> You could have a bunch of tests of increasing complexity.  
> The first bunch of tests all run in a few seconds and test 
> some basic functionality.  From experience, you also know 
> that these are the tests that are most likely to fail as you 
> port to a new environment.
> 
> There's also some tests which take a long time to run.  If 
> the basic stuff that's being tested by the earlier tests 
> doesn't work, there's no way these tests could pass, but they 
> still take a long time to fail.

How about something like this:

def run_quickies():
    # run the quick, i.e. actual unit tests
    # located in folder ./unit_tests/

def run_long_ones():
    # Run function tests, integration tests, what have you
    # located in folder ./integration_tests/

def whole_shebang():
    run_quickies()
    run_long_ones()

Now you do something like run the unit tests every time a file is saved, and
run the whole shebang nightly and every time a build is performed.

Regards,
Ryan Ginstrom



From castironpi at gmail.com  Thu May 15 19:49:28 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:49:28 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
Message-ID: <24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>

On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
> On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > work:
>
> > > > > > from mutagen.mp3 import MP3
> > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > [snip]
> > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > contents.
>
> > > > cool, so how do i give it the path, if not in the form of a URL
> > > > string? ?maybe this is obvious...
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > It doesn't look like you can, with mutagen. So, time to find a different
> > > library that supports arbitrary file objects instead of only file paths.
> > > I'd suggest starting here:
> > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > Possibly one with actual documentation, since that would also be a step
> > > up from mutagen.
>
> > After a bit of time looking around, looks like nearly all the python id3
> > modules expect to work with filenames, instead of file objects.
>
> > I can't vouch for it, and the documentation still looks sparse, but this
> > module at least looks capable of accepting a file object:
> >http://pypi.python.org/pypi/tagpy
>
> > Looks like it'd be a challenge to build if you're on windows, since it
> > depends on an external library.
>
> > Alternately, you could probably create a subclass of the mutagen stuff
> > that used an existing file object instead of opening a new one. No idea
> > what that might break, but seems like it would be worth a try.
>
> > As last ditch option, could write the first few kb of the file out to a
> > temp file and see if mutagen will load the partial file.
>
> Okay, now I'm officially spending too much time looking through this
> stuff.
>
> However, looks like the "load" method of the MP3 class is what you'd
> want to override to change mutagen's file loading behavior. Probably
> pass the URL as the filename, and take a cut & paste version of the
> default load method from ID3FileType and change it to use urllib2 to
> open it instead of a local file open.
>
> Might work. Might not. No warranty express or implied.
> --
> John Krukoff <jkruk... at ltgc.com>
> Land Title Guarantee Company- Hide quoted text -
>
> - Show quoted text -

I'm supposed to question "time.toomuch.spend".  NAMERS!


From noah at noah.org  Tue May  6 16:21:30 2008
From: noah at noah.org (Noah)
Date: Tue, 6 May 2008 13:21:30 -0700 (PDT)
Subject: How do you debug memory usage?
References: <mailman.652.1210080485.12834.python-list@python.org>
Message-ID: <56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>

On May 6, 6:27 am, David <wizza... at gmail.com> wrote:
> Hi list.
> What is the best way to debug memory usage in a Python script?
> ...
> Are there any tools/modules/etc I can use like this?
> David.

You need to use the debug build of Python to get exact numbers,
but there are a few tricks you can use with the standard build
to detect memory leaks. The simplest thing is to simply watch the
RSS column output of `ps aux` (I'm assuming you are using UNIX).

The other trick I got from Chris Siebenmann
http://utcc.utoronto.ca/~cks/space/blog/python/GetAllObjects
I modified his example a little bit. This does not tell you how
many bytes of memory your running code is using, but it will
show you the number of objects. When looking for memory leaks,
counting the number of objects is sufficient to detect leaks.
For example, say you suspect a function is leaking memory.
You could call it in a loop like this and watch the count of
objects before and after each call.

  while True:
      print "Number objects before:", len(get_all_objects())
      suspect_function()
      print "Number objects after:", len(get_all_objects())

Here is my modified version of Chris' get_all_objects() function.
All I did was force garbage collection using gc.collect().
This makes sure that you are not counting objects that Python has
left in memory, but plans on deleting at some point.

  import gc
  # Recursively expand slist's objects
  # into olist, using seen to track
  # already processed objects.
  def _getr(slist, olist, seen):
      for e in slist:
          if id(e) in seen:
              continue
          seen[id(e)] = None
          olist.append(e)
          tl = gc.get_referents(e)
          if tl:
              _getr(tl, olist, seen)
  # The public function.
  def get_all_objects():
      """Return a list of all live Python objects, not including the
list itself."""
      gc.collect()
      gcl = gc.get_objects()
      olist = []
      seen = {}
      # Just in case:
      seen[id(gcl)] = None
      seen[id(olist)] = None
      seen[id(seen)] = None
      # _getr does the real work.
      _getr(gcl, olist, seen)
      return olist

--
Noah


From http  Wed May  7 03:51:51 2008
From: http (Paul Rubin)
Date: 07 May 2008 00:51:51 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xbq3iaa82.fsf@ruckus.brouhaha.com>
	<15eb97d1-4318-4648-9120-d7d27d7dc435@b64g2000hsa.googlegroups.com>
Message-ID: <7x8wyma6w8.fsf@ruckus.brouhaha.com>

Carl Banks <pavlovevidence at gmail.com> writes:
> Nonsense.  They could be more than willing to contribute their
> patches, but aren't willing to accept the GPL's limitation to being
> used only in open source packages.

Oh, I see what you mean--I'm considering any derived work to be a
patch, which is maybe an overbroad use of that term.  If they are
willing to contribute their patches in that sense, the GPL shouldn't
be a problem.  If they want to just send back small scraps of
improvement while incorporating the GPL'd program into a closed
program, the GPL is doing its job if it prevents that.


From mmanns at gmx.net  Sun May 25 07:43:15 2008
From: mmanns at gmx.net (Martin Manns)
Date: Sun, 25 May 2008 13:43:15 +0200
Subject: Getting a set of lambda functions
Message-ID: <g1bjcj$u3m$1@aioe.org>

Hi,

I try to get a set of lambda functions that allows me executing each
function code exactly once. Therefore, I would like to modify the set
function to compare the func_code properties (or the lambda
functions to use this property for comparison). 

(The reason is that the real function list is quite large (> 1E5), there
are only few functions with non-equal code and the order of execution
is not important.)

How can I achieve this?

>>> func_strings=['x', 'x+1', 'x+2', 'x']
>>> funclist = [eval('lambda x:' + func) for func in func_strings]
>>> len(funclist)
4
>>> len(set(funclist))
4
>>> funclist[0].func_code == funclist[3].func_code
True
>>> funclist[0] == funclist[3]          
False


Thanks in advance

Martin


From marlin_rowley at hotmail.com  Sat May 17 17:45:56 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 16:45:56 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482F0090.4030003@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
	<482F0090.4030003@islandtraining.com>
Message-ID: <BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>

Actually in my traversal of the never-ending maze of understanding arrays in python, I stumbled that the data in the wrong sequence.
 
Let's get back to this transpose() deal, say we have these values as integers (representing rgba again): [[[0,1,2,3][4,5,6,7][8,9,10,11][12,13,14,15]] [[16,17,18,19][20,21,22,23][24,25,26,27][28,29,30,31]]] Now if I do this: transpose((2,0,1)), I get this: [[[0,4,8,12] [16,20,24,28]][[1,5,9,13] [17,21,25,29]][[2,6,10,14][18,22,26,30]][[3,7,11,15][19,23,27,31]]] This is NOT what I want.  I want the new array to be: [0,4,8,12][1,5,9,13][2,6,10,14][3,7,11,15][16,20,24,28][17,21,25,29][18,22,26,30][19,23,27,31] How do I do this? -M



> Date: Sat, 17 May 2008 08:58:08 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > > > Very cool.> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > a represents a tile with height of 2 and width of 4 with 4 bits/pixel > > for each color.> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')> > this seperates the stream into individual values - Check> > > > > >>> b.shape=(2,4,4)> >> > This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check> > > > >>> c = b.transpose((2,0,1))> > > > What does the (2,0,1) represent in terms of width and height and > > number of bytes?> > The (2,0,1) tells how to exchange the axes. For instance in a 2D array, > a normal transpose exchanges rows and columns. It will change a (a by > b) sized array into a (b by a) sized array. This would be equivalent to > the more saying interchange axes 0,1 to the new order of 1,0. > > In numpy with higher dimension arrays, the default transpose just > exchanges the first two axes, and the full transpose allows you to > specify exactly the new ordering of the exes. > > So transpose((2,0,1)) means take axes (0,1,2) to the new order > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being > of size (c by a by b) in size. > > In terms of implementation, there may not be *any* data re-arrangement > in a transpose. The only thing that needs changing is how the indices > are converted to an actual machine address of an indexed item. The > documentation notes this by saying transpose returns a "new view" of the > array. This explains why I copied the array before extracting bytes > out of it -- you really do need the elements in the new order for the > next operation.> > Gary Herron> > >> >> >> >> > > > ------------------------------------------------------------------------> >> > > Date: Fri, 16 May 2008 17:08:20 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com; python-list at python.org> > > Subject: Re: numpy.frombuffer != unpack() ??> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > Say I have an array:> > > >> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > >> > > > How do I make it so that I now have:> > > >> > > > starting with first element (a[0])> > > > new_arr[0] = 'r'> > > > new_arr[1] = 'g'> > > > new_arr[2] = 'b'> > > > new_arr[3] = 'a'> > > > new_arr[4] = 'r'> > > > .....> > > >> > > > continuing "through" a[1] with the same new_arr> > > > new_arr[N] = 'r'> > > > new_arr[N+1] = 'g'> > > > ....> > > >> > > > -M> > >> > > Numpy can do this for you. First, do you really mean the array to> > > contain lists of one string each? If so:> > >> > > >>> import numpy> > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a> > > kludge here> > > >>> b> > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',> > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> > > 'b', 'b', 'a', 'a', 'a', 'a'],> > > dtype='|S1')> > > >>> b.shape=(2,4,4)> > > >>> b> > > array([[['r', 'r', 'r', 'r'],> > > ['g', 'g', 'g', 'g'],> > > ['b', 'b', 'b', 'b'],> > > ['a', 'a', 'a', 'a']],> > >> > > [['r', 'r', 'r', 'r'],> > > ['g', 'g', 'g', 'g'],> > > ['b', 'b', 'b', 'b'],> > > ['a', 'a', 'a', 'a']]],> > > dtype='|S1')> > > >>> c = b.transpose((2,0,1))> > > >>> c> > > array([[['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']],> > >> > > [['r', 'g', 'b', 'a'],> > > ['r', 'g', 'b', 'a']]],> > > dtype='|S1')> > > >>> d=c.copy() # To make it contiguous> > > >>> d.shape = (32,)> > > >>> d> > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',> > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> > > 'b', 'a', 'r', 'g', 'b', 'a'],> > > dtype='|S1')> > >> > > Done. Cool no?> > >> > > Gary Herron> > >> > > >> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > From: marlin_rowley at hotmail.com> > > > To: robert.kern at gmail.com; python-list at python.org> > > > Subject: RE: numpy.frombuffer != unpack() ??> > > > Date: Fri, 16 May 2008 17:31:30 -0500> > > >> > > > Thank you! That solved it!> > > >> > > > -M> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > > To: python-list at python.org> > > > > From: robert.kern at gmail.com> > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > > Date: Fri, 16 May 2008 17:25:00 -0500> > > > >> > > > > Marlin Rowley wrote:> > > > > > All:> > > > > >> > > > > > I'm getting different floating point values when I use numpy> > > > vs. unpack().> > > > > >> > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > > > buffer = unpack("!f", byte)> > > > > >> > > > > > frgba[0] != buffer[0]> > > > > >> > > > > > why? This is forcing me use the unpack() function since it's> > > > giving me> > > > > > the correct values. What am I doing wrong?> > > > >> > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > > > '>'). Most> > > > > likely, you are on a little-endian platform. All of the dtypes> > > > in numpy default> > > > > to the native-endianness unless specified. If you want to read> > > > big-endian data> > > > > using numpy, do this:> > > > >> > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > > > >> > > > > If you have any more problems with numpy, please join us on the> > > > numpy mailing> > > > > list. When reporting problems, please try to provide a small but> > > > complete> > > > > snippet of self-contained code, the output that you got, and> > > > explain the output> > > > > that you expected to get. Thank you.> > > > >> > > > > http://www.scipy.org/Mailing_Lists> > > > >> > > > > --> > > > > Robert Kern> > > > >> > > > > "I have come to believe that the whole world is an enigma, a> > > > harmless enigma> > > > > that is made terrible by our own mad attempt to interpret it as> > > > though it had> > > > > an underlying truth."> > > > > -- Umberto Eco> > > > >> > > > > --> > > > > http://mail.python.org/mailman/listinfo/python-list> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > E-mail for the greater good. Join the i?m Initiative from> > > > Microsoft.> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > E-mail for the greater good. Join the i?m Initiative from Microsoft.> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Keep your kids safer online with Windows Live Family Safety. Help > > protect your kids. > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From p.wallstedt at gmail.com  Fri May 23 04:52:02 2008
From: p.wallstedt at gmail.com (Peter)
Date: Fri, 23 May 2008 01:52:02 -0700 (PDT)
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
Message-ID: <88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>

On 15 Maj, 19:37, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-15, p.wallst... at gmail.com <p.wallst... at gmail.com> wrote:
>
> > I have a small but rather annoying problem withpyserial. I want to
> > open a file on disk for reading and then open a com-port, write lines
> > from the file to the port and then read something back and compare it
> > to the next line in the file. Should be simple. And it is, apart from
> > the fact that the file seems to be doubled ...? Or it loops through
> > the file twice.
>
> > If I exclude the "import serial" it works.
>
> > Any ideas?
>
> Your problem is in line 117 of your program.
>
> --
> Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! Hmmm ... an arrogant
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? bouquet with a subtle
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?suggestion of POLYVINYL
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?CHLORIDE ...

Do you have to much time?


From http  Thu May 29 15:20:09 2008
From: http (Paul Rubin)
Date: 29 May 2008 12:20:09 -0700
Subject: Remote Debugging for python.
References: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>
Message-ID: <7xlk1slxxy.fsf@ruckus.brouhaha.com>

nkarkhan <nkarkhan at gmail.com> writes:
> How do I do that with python?
> I have multi-threaded python programs running on a remote machine. I
> want to se where they are at any instance.

www.winpdb.org


From inhahe at gmail.com  Thu May 22 13:29:37 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:29:37 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <w2iZj.78703$%15.53955@bignews7.bellsouth.net>


"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1476.1211475183.12834.python-list at python.org...
> I've noticed that the value of math.pi -- just entering it at the 
> interactive prompt -- is returned as 3.1415926535897931, whereas (as every 
> pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the 
> end.)

Another way of saying it is: 3.1415926535897932 is of course an 
approximation.  It's the closest approximation to pi given X digits in base 
10.  In base 2 the closest approximation to pi given Y digits is different.




From mde at MicahElliott.com  Tue May  6 09:21:50 2008
From: mde at MicahElliott.com (Micah Elliott)
Date: Tue, 06 May 2008 06:21:50 -0700
Subject: os.open and O_EXCL
In-Reply-To: <481A0AD9.8050502@admailinc.com>
References: <481A0AD9.8050502@admailinc.com>
Message-ID: <20080506132150.GC6567@micahelliott.com>

On 2008-05-01 Ethan Furman wrote:

> I am trying to lock a file so no other process can get read nor
> write  access to it.

This looks promising:

    http://pypi.python.org/pypi/lockfile/0.2

-- 
Micah Elliott | mde at MicahElliott.com | http://MicahElliott.blogspot.com
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From cfbolz at gmx.de  Sun May  4 11:31:18 2008
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sun, 04 May 2008 17:31:18 +0200
Subject: PyPy Berlin Sprint, 17th - 22nd May 2008
Message-ID: <481DD6C6.4060302@gmx.de>

=====================================================================
         PyPy Berlin Sprint (17-22nd May 2008)
=====================================================================

The next PyPy sprint will be in the crashed `c-base space station`_,
Berlin, Germany, Earth, Solar System.  This is a fully public sprint:
newcomers (from all planets) and topics other than those proposed below
are welcome.

.. _`c-base space station`: http://www.c-base.org/


------------------------------
Goals and topics of the sprint
------------------------------

  - work on PyPy's JIT generator: we are refactoring parts of the
    compiling logic, in ways that may also allow generating better
    machine code for loops (people or aliens with knowledge on
    compilers and SSA, welcome)

  - work on the SPy VM, PyPy's Squeak implementation, particularly the
    graphics capabilities

  - work on PyPy's GameBoy emulator, which also needs graphics support

  - trying some large pure-Python applications or libraries on PyPy and
    fixing the resulting bugs. Possibilities are Zope 3, Django and
    others.

* We are open to all sorts of other tasks during the sprint, just
  propose something.

-----------------------
Location & Accomodation
-----------------------

The sprint will take place in the c-base in Berlin. The address is::

    c-base e.V.
    Rungestrasse 20
    10179 Berlin

To get there, take the U-Bahn or S-Bahn to the station
"Jannowitzbr?cke". See here_ for a map to get to c-base from there.

.. _here:
http://maps.google.com/maps?f=q&hl=en&geocode=&q=c-base+berlin&ie=UTF8&ll=52.515464,13.408985&spn=0.020449,0.057335&z=15&iwloc=A

If you want to come, please register via by svn:

  http://codespeak.net/svn/pypy/extradoc/sprintinfo/berlin-2008/people.txt

or write a mail to the pypy-sprint mailing list if you do not yet have
check-in rights:

  http://codespeak.net/mailman/listinfo/pypy-sprint

Of course, especially given the location, it's ok to show up even if you
didn't register.  (The c-base has probably got the plans of Guido's
famous time machine anyway, so you can register last week.)


-----------
Exact times
-----------

The sprint will be from 17th to 22nd of May 2008. We will start
sprinting every day at 10. An introduction will be given on the first
day, if there is interest.
_______________________________________________
pypy-sprint mailing list
pypy-sprint at codespeak.net
http://codespeak.net/mailman/listinfo/pypy-sprint



From scott.hafeman at rogers.com  Thu May 22 15:53:54 2008
From: scott.hafeman at rogers.com (scott.hafeman at rogers.com)
Date: Thu, 22 May 2008 12:53:54 -0700 (PDT)
Subject: Shell-independent *nix setup script
Message-ID: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>

Hi,
Is it worthwhile maintaining a production application setup script in
Python as opposed to shell-script?  The main goal of this setup script
is to sniff a user's environment and export environment variables to
the calling (parent) process.
Either way, some file would need to be sourced into the user's
environment, so why not use a richer language where the setup logic is
independent of the user's shell being used.

Thanks for your feedback,
Scott


From larzluv at hotmail.com  Sun May 11 22:08:37 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 19:08:37 -0700 (PDT)
Subject: Saving an audio file's waveform into an image
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <4c79af19-d75d-41af-95c6-777f99af6593@m3g2000hsc.googlegroups.com>

On May 9, 1:55 am, Julien <jpha... at gmail.com> wrote:
> Hi,
>
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?
>
> I heard about the Snack module, but the project looks dead and un-
> maintained.
>
> Your advice would be greatly appreciated.
>
> Thanks!
>
> Julien


Would you please provide more info on what you're wanting to
accomplish?

As for "Snack module", all I could find was http://www.wanware.com/tsgdocs/snack.html,
which seems "dead", although the Google cached version at
http://64.233.167.104/search?q=cache:gNGrrPqY5RsJ:www.wanware.com/tsgdocs/snack.html+python+snack+module&hl=en&ct=clnk&cd=1&gl=us
makes it sound rather UNlike what you're talking about.  (Other ref's
for my Google search of http://www.google.com/search?hl=en&q=python+snack+module&btnG=Google+Search
seemed to show the same thing.)


The short answer is: Huh?/What?/Why?  Why not put the picture + sound
==> video file.  (Sure the image remains static, but there's the
Soundtrack with it!  ;) )


Cheers,
-Larry Hale


From amit.uttam at gmail.com  Fri May 16 20:12:42 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:12:42 -0700 (PDT)
Subject: SImple python print question
References: <47054b9b-fb5e-4601-9e2d-75bfe61e9cb8@w1g2000prd.googlegroups.com>
	<6330d8bf-f164-4ae6-8bfb-76c742a72ad2@2g2000hsn.googlegroups.com>
Message-ID: <63a95035-0175-42bb-adc4-264b58785bb8@n1g2000prb.googlegroups.com>

On May 16, 4:03 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 16, 6:38 pm, amit.ut... at gmail.com wrote:
>
>
>
> > Hey there,
>
> > I have a simple question about python print statement. Take the
> > following code snippet for example...
>
> > 1 print "-#- executing: %s" % section,
> > 2 tests[section] = test.testcase(name=config.get(section,'name'))
> > 3 tests[section].runTest()
> > 4 printStatus(tests[section])
>
> > Now the problem is that line 1 does not get printed until line 4. What
> > I thought would happen is that line 1 gets executed and the user sees
> > that the statement that the test case is executing. Then after the
> > test case executes a "PASS" or "FAIL" appears on the same line as the
> > "-#- executing: 0053" statement.
>
> > e.g.
> > -#- executing: 0053     FAIL
>
> > Some tests take a long time to finish thus the screen is blank until
> > the entire test finishes and the above statement is outputted.
>
> Your standard output uses line-buffering, which means that the
> underlying I/O code stores all the output in memory until it gets a
> newline, only then does it send the output to the terminal (or
> console, or whatever).
>
> Workarounds to this are as follows:
>
> 1. Explicity flush the buffer after any print statements that end with
> a comma:
>
> print "whatever",
> sys.stdout.flush()
>
> 2. Run Python in unbuffered mode, by using the -u switch:
>
> python -u yourscript.py
>
> Carl Banks

Thanks for the reply. This worked as expected. I did not know about
the -u switch, this is good stuff.

Amit


From skanemupp at yahoo.se  Tue May 13 12:49:33 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 09:49:33 -0700 (PDT)
Subject: Fill memeory with endless loop?
Message-ID: <252c17a9-01a6-4abe-9515-2507e0e50a20@l64g2000hse.googlegroups.com>

if i do something like
while 1:
    print "x"

will the program ever stop because it runs out of memory? or is the
print x never stored somewhere?
if u do soemhting like add element to a list it has an upper nbr of
elements right? if though huge...
does windows or any other OS have some proces that would stop
something like this after a while? could be interpreted a s a virus
perhaps?



From twoelz at gmail.com  Wed May  7 08:42:50 2008
From: twoelz at gmail.com (Thomas Woelz)
Date: Wed, 7 May 2008 05:42:50 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <a5fda5c5-6389-4d05-b9e0-39a303cadbb3@e53g2000hsa.googlegroups.com>

On 7 maio, 09:25, swap... at gmail.com wrote:
> Any idea why the following program does not work? I was learning IO on
> Python and the following generates a TypeError: range() integer end
> argument expected, got str.
> I am a beginner.
>
> ################################
> # print input name (str k), j times using raw_input
>
> def hello():
>     j=raw_input("Please type in the number of times you want to print
> ")
>     k=raw_input("Please type in your name ")

    # add this:
    j = int(j)

>     printname(j,k)
>
> def printname(j,k):
>           for i in range(j):
>                 print ("Hello %s" % k)
> ################################

theres too much whitespace in the printname function, try to stick
with 4 spaces (and no tabs) for each block


From python at bdurham.com  Wed May  7 10:44:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 10:44:47 -0400
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <fvs2rj$cru$1@aioe.org>
References: <fvs2rj$cru$1@aioe.org>
Message-ID: <1210171487.15211.1251897623@webmail.messagingengine.com>

Pistacchio,

Templite
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496702

A light-weight (~40 lines), fully functional, general purpose templating
engine, allowing you to embed python code directly into your text. This
engine is suitable for any templating (not only HTML/XML), and is
minimal (40 lines of code!) and fast (all preprocessing is done in
"compile time")

Quote: "Very nice. That's just the right amount of markup for embedding
Python into html documents."

Malcolm


From robert.kern at gmail.com  Sat May 17 18:33:37 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 17 May 2008 17:33:37 -0500
Subject: how to use the transpose function in numpy?
In-Reply-To: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>
References: <BAY135-W11F7429A866FF1660A322B9FCB0@phx.gbl>
Message-ID: <g0nmg1$ufp$1@ger.gmane.org>

Ask numpy questions on the numpy mailing list:

   http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From m.shanmugarajan at gmail.com  Thu May 22 06:29:41 2008
From: m.shanmugarajan at gmail.com (Shan)
Date: Thu, 22 May 2008 03:29:41 -0700 (PDT)
Subject: wsdl2py throwing error while creating client side code
Message-ID: <edd91cd3-789e-447f-ac92-03bf83d228ad@z16g2000prn.googlegroups.com>

I am developing an application using web services in python (ZSI
Zolera Sopa Infrastructure)
I am  trying to create client side code of the wsdl file in the web
service using wsdl2py. But i ended with an error from wsdl2py

Here is the code


[user1 at localhost wsdl]$  wsdl2py -b -f vimService.wsdl
Traceback (most recent call last):
  File "/usr/bin/wsdl2py", line 5, in ?
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 2561, in ?
    working_set.require(__requires__)
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 626, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.4/site-packages/setuptools-0.6c8-py2.4.egg/
pkg_resources.py", line 524, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: ZSI==2.0


What may be the problem...? If any one can help me with this then it
will be very useful.

Thanks and Regards,
Shan


From george.sakkis at gmail.com  Thu May  1 11:11:25 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 08:11:25 -0700 (PDT)
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl> 
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org> 
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org> 
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de> 
	<74c070ce-1b8f-4746-9d1c-ac2227aaf515@y21g2000hsf.googlegroups.com> 
	<Xns9A9156C608E88duncanbooth@127.0.0.1>
Message-ID: <1f4ea5fe-9d39-4c2b-b443-bd908adc2ba0@t54g2000hsg.googlegroups.com>

On May 1, 3:36 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:

> George Sakkis <george.sak... at gmail.com> wrote:
> > On Apr 30, 5:06 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> > wrote:
> >> Hall?chen!
>
> >> SL writes:
> >> > "Gabriel Genellina" <gagsl-... at yahoo.com.ar> schreef in bericht
> >> >news:mailman.365.1209541507.12834.python-list at python.org...
>
> >> >> En Wed, 30 Apr 2008 04:19:22 -0300, SL <n... at hao.com> escribi?:
> And
> >> >> that's a very reasonable place to search; I think chr and ord are
> >> >> builtin functions (and not str methods) just by an historical
> >> >> accident. (Or is there any other reason? what's wrong with
> >> >> "a".ord() or str.from_ordinal(65))?
>
> >> > yes when you know other OO languages you expect this. Anyone know
> >> > why builtins were chosen? Just curious
>
> >> *Maybe* for aesthetical reasons.  I find ord(c) more pleasent for
> >> the eye.  YMMV.
>
> >> The biggest ugliness though is ",".join().  No idea why this should
> >> be better than join(list, separator=" ").
>
> > Seconded. While we're at it, a third optional 'encode=str' argument
> > should be added, to the effect of:
>
> > def join(iterable, sep=' ', encode=str):
> >     return sep.join(encode(x) for x in iterable)
>
> > I can't count the times I've been bitten by TypeErrors raised on
> > ','.join(s) if s contains non-string objects; having to do
> > ','.join(map(str,s)) or ','.join(str(x) for x in s) gets old fast.
> > "Explicit is better than implicit" unless there is an obvious default.
>
> I'm afraid I don't agree with you on this. Most places where I use join
> I already know the type of the values being joined. In those few cases
> where I want to join non strings, or want to do some other processing on
> the values the generator comprehension is easy and has the advantage
> that I can use a more complex expression than a simple function call
> without having to wrap it in a lambda or otherwise contort things:
>
> e.g. comma.join(x[1] for x in s)
> vs.  comma.join(s, encode=operator.itemgetter(1))
> or   comma.join(s, encode=lambda x: x[1])

You don't have to use encode; you can write it as
join((x[1] for x in s), comma)

The main benefit of encode is its obvious default (=str), otherwise
it's not strictly necessary (although it is handy for named functions
e.g. encode=repr).

> Plus of course, you aren't going to be writing ','.join(str(x) for x in
> s) more than once in any given program before you extract it out to a
> function, are you?

In fact I am, not every one-liner needs to be a function. Just the
fact that such a function would live in a general utils module that I
have to import in most of my other modules (effectively making it a
two-liner) is not worth the few extra keystrokes.

George


From deets at nospam.web.de  Wed May 14 18:41:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 15 May 2008 00:41:00 +0200
Subject: Using file objects with elementtree
In-Reply-To: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
Message-ID: <69184aF2tsmnaU1@mid.uni-berlin.de>

dj schrieb:
> Hello,
> 
> Rather then holding my XML document in memory before writing it to
> disk, I want to create a file object that elementtree will write each
> element to has it is created. Does any one know how to do that ?
> 
> Here is my code so, far:
> 
> fd = open("page.xml", "w")
> tree.write( fd, encoding="iso-8859-1")
> 
> I know there's something I am doing wrong, but I just do not know
> what.

This isn't possible. How should ET handle the case that you add a 
child-node to a node that has been rendered already?

What you could try is to serialize subtrees that are closed to a stream.


Diez


From saluk64007 at gmail.com  Mon May 26 14:50:58 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 11:50:58 -0700
Subject: definition of a highlevel language?
In-Reply-To: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>

It basically works like this:

low level to high level

machine code
assembly -> translates to machine code
c -> compiles to assembly and machine code
python -> commands interpreted by a vm running on c

So python is "higher level" because it is built on top of lower level
languages.  If python were to compile to assembly/machine code (cython or
rpython perhaps) than it would be at the same level as c rather than higher
level.

At least this is my understanding of it.  PyPy at the moment is much higher
level than python, because it is built on top of python.

The higher the level of abstraction, the more flexible and portable a
language can be, in general.  Also, since it is built on more and more
things, time is spent translating down the stack, so higher level languages
tend to be slower as well.

However something like python is a bit tricky, because when you are using
extensions written in C, it sort of translates down skipping a step and acts
more on the c level.  The high-level/low-level waters are very muddy these
days.
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From salgerman at gmail.com  Tue May 13 21:53:47 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 18:53:47 -0700 (PDT)
Subject: where to get McMillan Installer?
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
	<a298d$4829d22b$4275d90a$12993@FUSE.NET>
Message-ID: <6a7f02ad-9c72-4626-add8-9bf31075f1ca@34g2000hsh.googlegroups.com>

On May 13, 1:59 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> gsal wrote:
> > There does not seem to be a valid url for the Installer, anywhere.
> > Could anyone provide me with a copy of it?
>
> > many thanks.
>
> http://pyinstaller.python-hosting.com/
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

Thanks, Kevin


From Ludwig at armand-miniatur.de  Wed May 21 01:34:21 2008
From: Ludwig at armand-miniatur.de (Ludwig Miniatur)
Date: Tue, 20 May 2008 22:34:21 -0700 (PDT)
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
	<a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com> 
	<mailman.1403.1211321574.12834.python-list@python.org>
Message-ID: <cbe7e8d3-12cf-43c4-9b07-d4fd03718d25@s50g2000hsb.googlegroups.com>

On 21 Mai, 00:12, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Tue, 20 May 2008 16:22:10 -0300, Joe P. Cool
> <joe.p.c... at googlemail.com> escribi?:
>
>
>
> > Ludwig Miniatur wrote:
> >> For example:
> >> #!/usr/bin/env python
>
> >> from parser import suite, ast2list
> >> fh = file(__file__)
> >> s = fh.read()
> >> fh.close()
> >> ast = suite(s)
>
> >> while False:
> >>   print "hello world"
> >> # comment
>
> >> Looks like a little bug in parser; but what I don't understand is that
> >> I thought parser was build with the current syntax of python.
>
> > I didn't read the grammar but I assume that Python grammar requires a
> > comment to have the form #.*<end-of-line>.
>
> >> So, why can python run the script (an it can if you comment out the
> >> line "ast = suite(s)") but parser can't?
>
> > The interpreter probably appends a newline after the input stream as a
> > friendly service :)
>
> Something like that. The last line of source *must* end in a newline (be
> it a comment or not); this is a known limitation. See py_compile.py for an
> example.
>
> --
> Gabriel Genellina

Uoh, you never stop learning...
Thanks for the explanation. I thought something like that, but it made
me some headaches.

Lutz


From castironpi at gmail.com  Tue May 13 10:31:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:31:24 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
	<g0c58c$qag$01$1@news.t-online.com> 
	<dc6bba33-9f82-42fe-aaf0-0248552ef940@8g2000hse.googlegroups.com>
Message-ID: <3aacfe8b-f00d-494f-845f-488beeb5b2ef@m44g2000hsc.googlegroups.com>

On May 13, 9:08?am, castiro... at gmail.com wrote:
> On May 13, 8:32?am, Peter Otten <__pete... at web.de> wrote:
>
> > Giuseppe Ottaviano wrote:
> > > def ichain(seq):
> > > ????????for s in seq:
> > > ????????????????for x in s: yield x
>
> > > (which is often useful and I don't think it has been included in ?
> > > itertools) you can iterate lazily on the file:
>
> > Python 2.6 includes itertools.chain.from_iterable() with that functionality.
>
> > Peter
>
> Can you color the help manual with very fine shades of off-white to
> ease reading? ?I was thinking a few pixels shy of red of white to
> accentuate what are the class methods and which are not. ?I also have
> an argument that net readability would decrease, but the sample sizes
> on that kind of metric are a little brinky with privacy fears around
> where I'm from. ?I just try to make Tron rings.

I am also me the that's the readability of legibles on color of light
the lighterers.

More simply, that could vary widely though, and I've heard of a
'fovea'.


From mensanator at aol.com  Thu May 29 12:26:24 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 29 May 2008 09:26:24 -0700 (PDT)
Subject: bit parsing from file
References: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>
Message-ID: <a8f14114-f3e9-4848-8737-6736a46da122@r66g2000hsg.googlegroups.com>

On May 29, 9:42?am, "rewo... at gmail.com" <rewo... at gmail.com> wrote:
> Hello,
>
> I'm tring to make a cutting script.
> The problem is the following, i have a sample pattern, for
> example :'11101110' (0xEE)
> That is the sign of the data begining.
> How can i cut a file if the byte stepping is not the same, for
> example:
>
> file=open('test.bin','rb')
> data=file.read()
> print binascii.hexlify(data) ? ? ? ? ? ?# BB9A (1011101110011010)
> file.close()
>
> so i need to cut the first two bit and start to writeout the bit
> stream to another file
> If somebody have an idea to do this, please share with me.
> Thanx

Cutting off the leading two bits isn't a problem,
but once you write out the byte 11101110  you are
left with 011010 which cannot be written as it's not
a byte. How do you plan to handle that? Add two bits
at the MSB (00011010) or two bits at the LSB (01101000)
or discard the fractional byte?

And do you always know what the bit offset is or
do you have to search for the 11101110 starting
pattern?

>
> Rew



From benjamin.kaplan at case.edu  Sat May 24 08:21:27 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sat, 24 May 2008 08:21:27 -0400
Subject: Reloading function obtained via 'from xxx import yyy'
In-Reply-To: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <ec96e1390805240521k6d834b21n9875369e45e5e3@mail.gmail.com>

On Fri, May 23, 2008 at 3:40 PM, Joel Koltner <zapwireDASHgroups at yahoo.com>
wrote:

> How do I get Python to correctly re-load this function definition?
>
> In test.py:
>
> def testFunc():
>    print 'My testFunc!'
>
> I execute...
>
> >>> from test import testFunc
> >>> testFunc()
> My testFunc!
>
> Fine... now I change test.py to:
>
> def testFunc():
>    print 'Modified testFunc!'
>
> ...and I'd like to reload testFunc.  How do I do so?  'from test import
> testFunc' keeps the old definition around, and 'reload test' of course
> doesn't
> work becayse I didn't use 'import test' in the first place.
>

"Namespaces are one honking great idea -- let's do more of those!"

If you don't want to have to type out the full name every time just do
"import test as t". That makes it only 2 extra characters to type. If you
don't put everything in the same namespace, you don't have to worry about
clashing.

>
> Thanks for the help,
> ---Joel
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From alex.m.gusarov at gmail.com  Tue May 27 03:31:35 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 00:31:35 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>

Hello, I have strong .NET background with C# and want to do some
familiar things from it with Python, but don't know how. For example,
I created form in qt designer with QCalendarWidget, translated it into
Python module and want to overload virtual method paintCell of
QCalendarWidget. In C# I can write following (abstract) code:

this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);

void myPaintCellHandler(object sender, PaintEventArgs e) {
    // some work here
}

I can't find how I can do similar thing in Python without inheriting
QCalendarWidget and overloading this method in inherited class (it's
long and I must create additional class). The only thing I done its
full replacement of handler:

calendar.paintCell = myPaintCell

def myPaintCell(self):
    pass

Operator += don't work with methods. So, I can't add handler or call
standart handler from my (infinite recursion, cause my handler
replaced standart)

Please, give me some advice, I know Python must be good enough to do
such things fast and elegant.

--
Best regards, Alex Gusarov


From skunkwerk at gmail.com  Mon May 12 15:31:49 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:31:49 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com>
Message-ID: <5bb546cd-1175-434c-9843-70f2ff691f15@c19g2000prf.googlegroups.com>

On May 12, 1:40 am, Rhamphoryncus <rha... at gmail.com> wrote:
> On May 11, 10:16 am,skunkwerk<skunkw... at gmail.com> wrote:
>
>
>
> > On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > > declaimed the following in comp.lang.python:
>
> > >         Coming in late...
>
> > > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > > >skunkwerkwrote:
> > > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > > new requests are inserted, like so:
>
> > >         <snip>
>
> > > > > > queue = Queue.Queue(0)
> > > > > >  WORKERS=100
> > > > > > for i in range(WORKERS):
> > > > > >    thread = SDBThread(queue)
> > > > > >    thread.setDaemon(True)
> > > > > >    thread.start()
>
> > > > > > the thread:
>
> > > > > > class SimpleDBThread ( threading.Thread ):
> > > > > >    def __init__ ( self, queue ):
> > > > > >            self.__queue = queue
>
> > >         Note: double-leading __ means "name mangling" -- typically only
> > > needed when doing multiple layers of inheritance where different parents
> > > have similar named items that need to be kept independent; a single _ is
> > > the convention for "don't touch me unless you know what you are doing"
>
> > > > > >            threading.Thread.__init__ ( self )
> > > > > >    def run ( self ):
> > > > > >            while 1:
> > > > > >                    item = self.__queue.get()
> > > > > >                    if item!=None:
> > > > > >                            model = domain.get_item(item[0])
> > > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > > >                            title = model['title']
> > > > > >                            scraped = model['scraped']
> > > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > > any suggestions?
> > > > > > thanks
>
> > >         <snip>
>
> > > > thanks John, Gabriel,
> > > >   here's the 'put' side of the requests:
>
> > > > def prepSDBSearch(results):
> > > >    modelList = [0]
> > > >    counter=1
> > > >    for result in results:
> > > >            data = [result.item, counter, modelList]
> > > >            queue.put(data)
> > > >            counter+=1
> > > >    while modelList[0] < len(results):
> > > >            print 'waiting...'#wait for them to come home
> > > >    modelList.pop(0)#now remove '0'
> > > >    return modelList
>
> > >         My suggestion, if you really want diagnostic help -- follow the
> > > common recommendation of posting the minimal /runable (if erroneous)/
> > > code... If "domain.get_item()" is some sort of RDBM access, you might
> > > fake it using a pre-loaded dictionary -- anything that allows it to
> > > return something when given the key value.
>
> > > > responses to your follow ups:
> > > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > > list in the above function.  it's not global, and the initial values
> > > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > > passes in the same memory address or declares a new 'data' list (which
> > > > I guess is what I want)
>
> > >         Rather confusing usage... In your "put" you have a list whose first
> > > element is "result.item", but then in the work thread, you refer to the
> > > entire list as "item"
>
> > > > 3)  the first item in the modelList is a counter that keeps track of
> > > > the number ofthreadsfor this call that have completed - is there any
> > > > better way of doing this?
>
> > >         Where? None of your posted code shows either "counter" or modelList
> > > being used by thethreads.
>
> > >         And yes, if you havethreadstrying to update a shared mutable, you
> > > have a race condition.
>
> > >         You also have a problem if you are using "counter" to define where
> > > in modelList a thread is supposed to store its results -- as you can not
> > > access an element that doesn't already exist...
>
> > > a = [0]
> > > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> > >         Now, if position is irrelevant, and a thread just appends its
> > > results to modelList, then you don't need some counter, all you need is
> > > to check the length of modelList against the count expected.
>
> > >         Overall -- even though you are passing things via the queue, the
> > > contents being pass via the queue are being treated as if they were
> > > global entities (you could make modelList a global, remove it from the
> > > queue entries, and have the same net access)...
>
> > >         IOWs, you have too much coupling between thethreadsand the feed
> > > routine...
>
> > >         As for me... I'd be using a second queue for return values...
>
> > > WORKERTHREADS = 100
> > > feed = Queue.Queue()
> > > result = Queue.Queue()
>
> > > def worker():
> > >         while True:
> > >                 (ID, item) = feed.get()                 #I leave the queues globals
> > >                                                                                 #since they perform locking
> > >                                                                                 #internally
> > >                 model = domain.get_item(item)
> > >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > > for i in range(WORKERTHREADS):
> > >         aThread = threading.Thread(target=worker)
> > >                 #overkill to subclass as there is now no specialized init
> > >                 #and if I really wanted to make the queues non-global
> > >                 #I'd pass them as arguments:
> > >                 #       threading.Thread(target=worker, args=(feed, results))
> > >                 #where worker is now
> > >                 #       def worker(feed, results):
> > >         aThread.setDaemon(True)
> > >         aThread.start()
>
> > > ...
>
> > > def prepSearch(searches):
> > >         modelList = []
> > >         counter = 0
> > >         for searchItem in searches:
> > >                 feed.put( (counter, searchItem) )
> > >                 counter += 1
> > >                 modelList.append(None)  #extend list one element per search
> > >         while counter:
> > >                 (ID, title, scraped) = results.get()
> > >                 modelList[ID] = (title, scraped)
> > >                 counter -= 1
> > >         return modelList
>
> > >         The only place counter and modelList are modified are within the
> > > prepSearch. I'm passing counter out and back to use as an ID value if
> > > the final results are supposed to be in order -- that way if one thread
> > > finishes before another, the items can be placed into the list where
> > > they'd have been sequentially.
>
> > >         I can only hope that "domain.get_item" is an activity that is I/O
> > > bound AND that it supports parallel accesses... Otherwise the above
> > > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > > threading swaps for what is otherwise a rather linear process.
>
> > >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > > mainthreadsthat are posting to the worker feed queue (and you were
> > > using separate mutables for storing the results). In this situation, I'd
> > > remove the results queue from being a global entity, create one queue
> > > per main processing thread, and pass the queue as one of the parameters.
> > > This way, a worker can return data to any source thread by using the
> > > supplied queue for the return...
>
> > > Modify prepSearch with:
>
> > >         myQueue = Queue.Queue()
> > > ...
> > >         feed.put( (counter, searchItem, myQueue) )
> > > ...
> > >         (ID, title, scraped) = myQueue.get()
>
> > > Modify worker with:
>
> > >         (ID, item, retqueue) = feed.get()
> > > ...
> > >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> > wow.  thanks for the help.
> >    i seem to have fixed my problem though - it turns out
> > domain.get_item was not thread safe as it was using the underlying
> > httplib.  the solution was to create a new connection to the database
> > for each thread (which is ok as the database is meant to be queried in
> > a massively paralell fashion).  the missing part of the code included
> > a part where i inserted the results at the given position into the
> > list.
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?  It wouldn't help having a .pyc or using
> > psycho, correct, as the time is being spent in the runtime?  something
> > along the lines of 'start a new thread every minute until you get to a
> > 100' without blocking the execution of the rest of the code in that
> > file?  or maybe any time i need to do a search, start a new thread if
> > the #threads is <100?
>
> $ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
> t.start(); t.join()'
> 10000 loops, best of 3: 131 usec per loop
>
> Clearly it is not the threads themselves, but something else which is
> expensive.
>
> It's not clear why you need threads at all.  Unless you've got a lot
> of cpus/cores running that DBMS, or it's got fairly high latency (and
> no way to pipeline), attacking it with more threads isn't gonna give
> significant speedups.

correct.  the threads themselves are not taking up the time, but the
initialization of each thread (which includes making a new connection
to the database) - typically this is ~3 seconds.  The database is
amazon's simpleDB, which is meant to support massively parallel
queries.  once the connection has been made, queries are very fast.

thanks


From robert.kern at gmail.com  Thu May 22 16:00:28 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 22 May 2008 15:00:28 -0500
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <4835A9D5.9060607@admailinc.com>
References: <48335269.2000809@admailinc.com>	<mailman.1406.1211324391.12834.python-list@python.org>	<48340df7$1@news.mel.dft.com.au>
	<4835A9D5.9060607@admailinc.com>
Message-ID: <g14jcs$2i3$1@ger.gmane.org>

Ethan Furman wrote:

> Next question:  when using struct.pack to store an integer, I get a 
> deprecation warning if the int is too big... I would rather have an 
> error.  Is there a setting somewhere that controls this?

http://docs.python.org/dev/library/warnings

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From bignose+hates-spam at benfinney.id.au  Thu May  8 19:34:38 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 May 2008 09:34:38 +1000
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <87lk2k9xpt.fsf@benfinney.id.au>

wxPythoner at gmail.com writes:

> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.

As explicitly defined in the language reference, the "negative"
operator has lower binding precedence than the "power" operator
<URL:http://www.python.org/doc/ref/summary.html>.

> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0.

It does, if you actually have a negative number that you're raising to
power 0.

    >>> (-123)**0
    1

> This is a rare case when the parser is fooled

The parser is operating according to the documented language
specification. It can't account for the user being fooled by external
sources.

-- 
 \     "You know what I hate? Indian givers... no, I take that back."  |
  `\                                                    -- Emo Philips |
_o__)                                                                  |
Ben Finney


From notnorwegian at yahoo.se  Sun May 25 15:58:47 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 12:58:47 -0700 (PDT)
Subject: 22.800000 and a 1 on the end!!??
Message-ID: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>

>>> x = 5
>>> x /= 2
>>> x
2
>>> x *=11.4
>>> x
22.800000000000001

ok where does the 1 in the come from?


From arnodel at googlemail.com  Tue May 20 02:03:58 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 07:03:58 +0100
Subject: this worked before...' '.join([`x  x` for x in range(1, 6)])
References: <c8d9f1b9-de29-4d18-b154-ee55adb875b9@m3g2000hsc.googlegroups.com>
	<mailman.1365.1211238151.12834.python-list@python.org>
Message-ID: <m2fxsd8qb5.fsf@googlemail.com>

John McMonagle <jmcmonagle at velseis.com.au> writes:

> notnorwegian at yahoo.se wrote:
>> ' '.join([`x  x` for x in range(1, 6)])
>> 
>> anyone can tell me what im doing wrong?
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>> 
>
>
> ' '.join(['%s %s' % (str(x), str(x)) for x in range(1,6)])
>
> or
>
> ' '.join([str(x)+' '+str(x) for x in range(1,6)])
>
>
> outputs....
>
> '1 1 2 2 3 3 4 4 5 5'
>
>
> Is that what you were after ?

Or:

' '.join(str(i//2) for i in xrange(2, 13))

?

-- 
Arnaud


From goldnery at gmail.com  Sat May 10 08:27:13 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 05:27:13 -0700 (PDT)
Subject: Simple question
Message-ID: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>

I use to write code with PHP.

To ran script width PHP I need to open new file inside my WWW
directory and name it somethin.php and then to write my script inside
<?php    ?>  tags

how can i ran script with python


thenks


From pistacchio at gmail.com  Wed May  7 10:17:19 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 16:17:19 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
Message-ID: <fvsdlh$8l3$1@aioe.org>

George Sakkis ha scritto:
> On May 7, 9:40 am, pistacchio <pistacc... at gmail.com> wrote:
> 
>> Diez B. Roggisch ha scritto:
>>
>>
>>
>>> pistacchio wrote:
>>>> Mike Driscoll ha scritto:
>>>>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>>>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>>>>> my server side needs but i can't seem to find what i'm looking for. for
>>>>>> most of my php work i use mysql and tinyButStrong
>>>>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>>>>> engine that offers powerful functionalities. you insert TBS tags in web
>>>>>> pages like:
>>>>>> <div align="center" class="title-page"> [var.x] </div>
>>>>>> and it replaces [var.x] with the value of global variable x. it also
>>>>>> makes blocks (and nested blocks) easy to implement:
>>>>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>>>>> [blk1;block=end] </p>
>>>>>> in the previous code it cycles throu all the values of the array blk1.
>>>>>> it does many more things, like htlm escaping, url and js encoding etc,
>>>>>> conditional displaying etc, but it is not more confusing that inserting
>>>>>> pieces of code into the HTML (aka: littering the code and kissing
>>>>>> goodbye to the code/presentation separation). it comes in the form of a
>>>>>> single file with a single class that you can easily include in the code
>>>>>> and go.
>>>>>> now, i've searched the net and it seems full of python-based frameworks
>>>>>> for doing server side scripting and templating, but none that suits my
>>>>>> needs.
>>>>>>     1. i like writing code and i like control. i mean, open up the
>>>>>> simplest text editor and write in it. i don't want something that is
>>>>>> command-line driven or that writes code for me like ">>>
>>>>>> makePagesFromThisDatabase()".
>>>>>>     2. i want something very lightweight. i don't want dozen of options,
>>>>>> pre-made blogging parts ecc. i just need a good non invasive template
>>>>>> engine and the basic functions for server side scripting, like session
>>>>>> managing, request parsing, functions to manipulate html code (encodings
>>>>>> etc)
>>>>>>     3. i don't want to beg my hosting provider to install the libraries.
>>>>>> a simple include file should do the work.
>>>>>>     4. object oriented programming is not required (better: i prefer
>>>>>> plain old procedural programming).
>>>>>> any help? thanks in advance
>>>> hi, thanks for replaying
>>>>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>>>>> and Genshi in 2.x (I think) for templating purposes. There's also
>>>>> Cheetah, one of the more powerful Python templating engines out there.
>>>> django is exacly the kind of giant i'm trying to avoid
>>>>> http://genshi.edgewall.org/
>>>> the first lines of the tutorial read:
>>>> "First, make sure you have CherryPy 3.0.x installed"
>>>> Now, cherrypy is something that is not properly "include a file and get
>>>> going!"
>>>>> http://www.kid-templating.org/
>>>> kid seems to have a non-linear approach, but i may give it a try
>>>>> http://www.cheetahtemplate.org/
>>>> cheetah was something that i already considered using. have i to
>>>> "install" it or can i just import it?
>>> You will need to install any of these. It is part of how python is designed.
>>> Extendability comes with a price-tag.
>> well, the problema is exacly that i'm looking for a python module, not
>> for a python library.
> 
> What does it matter if it's a single file or a dozen under a package ?
> "Installation" for pure Python packages can be as simple as copying
> the package under any directory in your PYTHONPATH.
> 

well, it doesn't matter if it's a single file or a package, but it 
_does_ matter if you have to put them under the path where python is 
installed because, in a typical shared web hosting environment (such the 
one that i use) you don't have access to system directories.

> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
> and fast.

woudl you suggest mako over cheetah?

> 
> George


From nagle at animats.com  Wed May 14 01:37:24 2008
From: nagle at animats.com (John Nagle)
Date: Tue, 13 May 2008 22:37:24 -0700
Subject: BeautifulSoup/sgmllib crash
In-Reply-To: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <482a776c$0$34554$742ec2ed@news.sonic.net>

    Here's another example of the annoying "attributes must be ASCII
but sgmllib doesn't check" problem.

Run "http://www.serversdirect.com" through BeautifulSoup, and watch it
blow up at this bogus HTML:

      <LI>Support Multi-Core Intel? Xeon? processor 3200/3000 sequence 
</LISUPPORT sequence 32003000 processor xeon? intel? multi-core>

The parser uses the ? symbol as part of an attribute name:

SGMLParser.feed(self, markup or "")
File "/usr/local/lib/python2.5/sgmllib.py", line 99, in feed
self.goahead(0)
File "/usr/local/lib/python2.5/sgmllib.py", line 138, in goahead
k = self.parse_endtag(i)
File "/usr/local/lib/python2.5/sgmllib.py", line 315, in parse_endtag
self.finish_endtag(tag)
File "/usr/local/lib/python2.5/sgmllib.py", line 353, in finish_endtag
method = getattr(self, 'end_' + tag)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xae' in position 46: 
ordinal not in range(128)

And we're downhill from there.  Probably worth fixing, since it's one of the
few real-world HTML bugs that totally blows up BeautifulSoup.

					John Nagle
					SiteTruth


From barisc at bckm.org  Wed May 21 21:20:18 2008
From: barisc at bckm.org (Baris-C)
Date: Wed, 21 May 2008 18:20:18 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <37c23ff2-215d-4f90-ad8a-c70c2a25a0eb@79g2000hsk.googlegroups.com>

On May 21, 11:10?pm, notbob <not... at nothome.com> wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so. ?No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
>
> So, here's my delimna: I want to start a blog. ?Yeah, who doesn't. ?Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever. ?I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank. ?Anyway, so I change over
> to learning php. ?Then I run across that blog, Coding Horror, and start
> reading articles like this:
>
> http://www.codinghorror.com/blog/archives/001119.html
>
> Now what? ?Go back to python. ?Soldier on with php? ?What do I know? ?Not
> much. ?I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp. ?I've taken basic basic and basic
> C, but am barely literate in html. ?Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears. ?
>
> Well, that's my actual question, then. ?Is php really so bad I'm just
> wasting my time? ?Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me). ?I admit I'm no code
> geek. ?But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking. ?What say ye?
>
> nb

By the way anything goes to you..


From johnjsal at gmailNOSPAM.com  Sun May 11 16:11:49 2008
From: johnjsal at gmailNOSPAM.com (John Salerno)
Date: Sun, 11 May 2008 16:11:49 -0400
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <48275316$0$11629$607ed4bc@cv.net>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Ok, I think most people are misunderstanding my question a little. I 
probably should have said xrange instead of range, but the point of my 
question remains the same:

Should a for loop be used simply to do something X number of times, or 
should it strictly be used to step through an iterable object for the 
purpose of processing the items in that object?


From msc at es.aau.dk  Wed May  7 07:24:22 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 13:24:22 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
Message-ID: <wdw63tquzkp.fsf@msc-dt.kom.auc.dk>

>>>>> "Duncan" == Duncan Booth <duncan.booth at invalid.invalid> writes:
[...]
Duncan> Now try:
Duncan> 
Duncan>    for command in getCommandsFromUser():
Duncan>        print "the result of that command was", execute(command)
Duncan> 
Duncan> where getCommandsFromUser is a greedy generator that reads from stdin, 
Duncan> and see why generators don't work that way.

I don't see a problem unless the generator isn't defined where it's
going to be used. In other similar input bound use cases, such as the
generator iterating over a query result set in my original post, I see
even less of a problem. Maybe I'm simply daft and you need to spell it
out for me. :-)

Martin


From http  Thu May  1 20:20:46 2008
From: http (Paul Rubin)
Date: 01 May 2008 17:20:46 -0700
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <7xve1xr1y9.fsf@ruckus.brouhaha.com>

jmDesktop <needin4mation at gmail.com> writes:
> I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these.  If I
> have mod_python or fastcgi on apache, where do I start?  I don't have
> clue where to begin to create a web page from scratch in python.  I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.

I didn't notice anyone mentioning the simplest answer of them all:
write an old fashioned cgi using python's cgi module.


From george.sakkis at gmail.com  Fri May 23 21:00:33 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 23 May 2008 18:00:33 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>

On May 23, 6:59?pm, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Hello group,
>
> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> ? ? ? ? printf("%d\n", q);
>
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> ? ? ? ? print p
>
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

The most obvious and readable of course: use two statements, as one
should do regardless of the language, instead of resorting to error-
prone hacks.

George


From dboddie at trolltech.com  Tue May 27 12:02:50 2008
From: dboddie at trolltech.com (David Boddie)
Date: Tue, 27 May 2008 18:02:50 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
Message-ID: <200805271802.50256.dboddie@trolltech.com>

On Mon May 26 17:37:04 CEST 2008, Alex Gusarov wrote:

> Hello, I have strong .NET background with C# and want to do some familiar
> things from it with Python, but don't know how. For example, I created form
> in qt designer with QCalendarWidget, translated it into Python module and
> want to overload virtual method paintCell of QCalendarWidget. In C# I can
> write following (abstract) code:
> 
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
> 
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }

Right. I vaguely remember someone showing something like this at EuroPython
a couple of years ago. I believe that this approach is actually registering
an event handler (or callback) to handle a certain type of event.

> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's long
> and I must create additional class).

Just out of interest, given that you have to put the event handler somewhere,
why is it a problem to derive a new class and reimplement paintCell()?

It really isn't that much code:

  class MyCalendarWidget(QCalendarWidget):
  
      def paintCell(self, painter, rect, date):
          # some work here

> So, I need to run my code whenever paintCell is called by Qt internals and
> I have no enough experience with Python for it. Please, give me some
> advice, I know Python must be good enough to do such things.

The principal mechanism for doing this is via inheritance. You can do things
with event filters, but it's more complex and almost like working against the
design of the library to do so.

I have a feeling that the form produced by Qt Designer, once converted to
code, contains references to QCalendarWidget where you really want to use a
customized calendar widget. If so, you should "promote" the calendar widget
in Qt Designer to use your widget instead, and make sure you import the
module that supplies it in your application.

If you need more information about this, just ask.

David
-- 
David Boddie
Lead Technical Writer, Trolltech ASA


From fuzzyman at gmail.com  Sun May 25 06:01:35 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 25 May 2008 03:01:35 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au><5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<ec96e1390805241357i6e481e3enf12b4d213e887008@mail.gmail.com> 
	<mailman.1551.1211678932.12834.python-list@python.org>
Message-ID: <b7402b32-ebb2-492b-bfa2-c0183a77329f@l42g2000hsc.googlegroups.com>

On May 25, 2:28?am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Benjamin Kaplan" <benjamin.kap... at case.edu> wrote in message
>
> news:ec96e1390805241357i6e481e3enf12b4d213e887008 at mail.gmail.com...
> | On Sat, May 24, 2008 at 10:14 AM, Fuzzyman <fuzzy... at gmail.com> wrote:
> || > For example, at Resolver Systems we expose the spreadsheet object
> | > model to our users. It hasa public, documented, API - plus a host of
> | > undocumented internally used methods.
> | >
> | > We would really *much* rather hide these, because anything our
> | > customers start using (whether documented or not) we will probably
> | > have to continue supporting and maintaining.
> | >
> | > The 'we told you not to use that' approach, when applied to paying
> | > customers doesn't really work... all they see is that you broke their
> | > spreadsheet code by changing your API.
>
> Python was not really written with 'difficult' customers in mind ;-)
>

True. It's extremely suited to what we do though.Minor difficulties
like this are vastly outweighed by advantages. The difficulties are
real though.

> One could largely hide private vars with a program that substituted random
> names for single _ names, and removed the doc strings for functions,
> classes, and methods with such names.
>


We need to *use* those names to display the spreadsheet once the
calculation has finished (and their code has run).

> Such a program could even put such names in a separate module imported as
> '_private_do_not_use_'.

Splitting more of the functionality out is probably part of the best
solution.

Michael Foord
http://www.ironpythoninaction.com/


From bignose+hates-spam at benfinney.id.au  Tue May 13 19:40:10 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:40:10 +1000
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
Message-ID: <87prrp4vtx.fsf@benfinney.id.au>

hdante <hdante at gmail.com> writes:

>  How can I access Usenet without using Google Groups ? (my ISP doesn't
> have a NNTP server).

Complain to your ISP; let them know they have a paying customer who
isn't getting an essential internet service. (No, this likely won't
change *your* situation, and yes, most ISPs are this neglectful.)

Then, <URL:http://en.wikipedia.org/wiki/Usenet#Free_Usenet_servers> or
a similar resource.

> Do you recommend doing so ?

Yes, definitely. Google Groups treats Usenet messages poorly.

>  What's your prefered news reader ?

Gnus <URL:http://gnus.org/>, a program running in Emacs. Thunderbird
<URL:http://www.mozilla.org/products/thunderbird/>, slrn
<URL:http://www.slrn.org/>, and tin <URL:http://www.tin.org/> have
also given me good Usenet experiences in the past.

-- 
 \       "Courage is resistance to fear, mastery of fear ? not absence |
  `\                     of fear.  -- Mark Twain, _Pudd'n'head Wilson_ |
_o__)                                                                  |
Ben Finney


From hdante at gmail.com  Sun May  4 23:09:02 2008
From: hdante at gmail.com (hdante)
Date: Sun, 4 May 2008 20:09:02 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com>

On May 4, 8:11?am, castiro... at gmail.com wrote:
> On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>
> > > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
> > >> I'm actually curious if there's a way to write a generator function
> > >> (not a generator expression) in C, or what the simplest way to do it
> > >> is... besides link the Python run-time.
>
> > > The reference implementation of Python is written in C, so obviously there
> > > must be a way to write something like generators in C.
>
> > Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
> > See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> > --
> > Gabriel Genellina
>
> Gabriel,
> How did your attempt turn out from last May? ?At first look, it's
> outside the scope of Python, but it is not the scope of C
> necessarily. ?Generators offer a lot of simplicity (which I haven't
> read about extensively, but am starting to see) that could gain some
> reputation for Python. ?What is the midpoint at which C could meet
> Python?
>
> There is no such thing as a 'frame' per se in C; byte code is
> integral. ?As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state. ?It's
> a hard thing to Google for without knowing the prior terminology for
> the work that's already been done on them in C. ?What work is there?
> Are any devs interested in pursuing it?
>
> The frame implementation.
>
> http://svn.python.org/projects/python/trunk/Include/frameobject.hhttp://svn.python.org/projects/python/trunk/Objects/frameobject.c
>
> The generator code.
>
> http://svn.python.org/projects/python/trunk/Include/genobject.hhttp://svn.python.org/projects/python/trunk/Objects/genobject.c
>
> I used Microsoft's search engine (python frame generator
> site:svn.python.org , links 3 and 5) to find it.

 Isn't this guy a bot ? :-) It's learning fast. I believe there is a
"frame" in C, composed of its stack and globals. For generators in C,
you may look for "coroutines". For example, see:

http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html

 A sample code follows:

#define crBegin static int state=0; switch(state) { case 0:
#define crReturn(i,x) do { state=i; return x; case i:; } while (0)
#define crFinish }
int function(void) {
    static int i;
    crBegin;
    for (i = 0; i < 10; i++)
        crReturn(1, i);
    crFinish;
}

 The "suspended state" is saved in the static variable. It's not
necessary to save the complete "frame", only the suspended state.



From __peter__ at web.de  Tue May 20 13:49:50 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 19:49:50 +0200
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>
Message-ID: <g0v2vs$38b$01$1@news.t-online.com>

Nikhil wrote:

> I have recently written a small module. When I import the module, I
> always get the error
> 
> 
> only when I do
> 
>  >>> from local.my.module import *
> 
> --
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute '/xyz/py/file'
> ---
> 
> 
> but when I do the below, I do not get any error.
> 
> --
>  >> import local.my.module
>  >>
> --
> 
> Any ideas on what could be wrong?

Are you abusing the __all__ attribute?

$ cat tmp.py
__all__ = ['/xyz/py/file']

$ python -c "from tmp import *"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute '/xyz/py/file'

Peter


From mankoff at gmail.com  Fri May 16 15:08:41 2008
From: mankoff at gmail.com (mankoff)
Date: Fri, 16 May 2008 12:08:41 -0700 (PDT)
Subject: Malloc error
Message-ID: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>

Hi Group,

I'm brand spanking new to Python. Never coded in it, but I'm
comfortable coding in general in other languages. I'm Trying to get
some legacy code to run on a newer machine. I don't have access to the
legacy box for debugging.

I'm getting the following error:

Python(36979) malloc: *** error for object 0x88374: Non-aligned
pointer being freed
*** set a breakpoint in malloc_error_break to debug

My python version is:

$ python
Python 2.5.2 (r252:60911, Feb 22 2008, 07:57:53)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

And this is on an Intel MacBook running 10.5.2

The error is getting printed hundreds of times until I CTRL+C at which
point I see:

Python(36979) malloc: *** error for object 0xa58074: Non-aligned
pointer being freed
*** set a breakpoint in malloc_error_break to debug
Traceback (most recent call last):
  File "v2_to_bdb.py", line 104, in <module>
    main()
  File "v2_to_bdb.py", line 101, in main
    fill_dbm(f, dbm, info, ids, sources)
  File "v2_to_bdb.py", line 34, in fill_dbm
    mystring = stationstring.serialize(dict, data)
KeyboardInterrupt

And advice on how to work around this error will be much appreciated.

Thanks,

   -k.


From roy at panix.com  Wed May 21 08:27:15 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 08:27:15 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
Message-ID: <roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>

In article <iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks Roy
> 
> Any ideas how to code this child process stuff, as I said I am newbie and 
> not from a coding background

The easiest thing would be to use os.system().  If you wanted to spawn 10 
child processes, you could do:

import os
for i in range(10):
    os.system ("./child.py &")

and then have child.py be a script that creates 1000 TCP connections.

Keep in mind that one man's stress test is another man's denial of service 
attack.  If there are any firewalls between you and your target, they may 
restrict the number of connections you get to make (or the rate at which 
they're created).  You may also get a polite phone call from your local IT 
people asking enquiring about your activities.


From inhahe at gmail.com  Fri May 16 11:58:49 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 11:58:49 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
Message-ID: <m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>

I'm not an expert in this but what does it mean to emphasize state?  It 
seems the opposite of that would be a) functional programming, and b) 
passing parameters instead of using global or relatively local variables. 
And maybe c) coroutines (generators as implemented in Python), although 
perhaps coroutines could be said to emphasize state inasmuch as they go out 
of their way to capture, objectify and reuse it (Stackless' microthreads, 
even moreso).  And Python seems to be well-noted for implementing some 
functional programming methodology, and as for passing parameters it's just 
as object-oriented as the rest of them.

But as I said, I'm not an expert, so let me know if I've gone astray..


> I have a proposition to ask you all: Python emphasizes state.  Is it
> true?
> 




From tjreedy at udel.edu  Thu May  8 01:14:31 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 01:14:31 -0400
Subject: class definition
References: <K5rUj.249337$pM4.157639@pd7urf1no>
	<a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4@mail.gmail.com>
Message-ID: <fvu27l$5s1$1@ger.gmane.org>


"Miles" <semanticist at gmail.com> wrote in message 
news:a49e45f50805071753l2176354ax4b6d8c2fbec3d4d4 at mail.gmail.com...
| On Wed, May 7, 2008 at 7:40 PM, Yves Dorfsman <yves at zioup.com> wrote:
| > Does it make a difference if you put subclass object or not ?
|  Old-style | classes will go away in Python 3 (I think),

Have gone ;-)

| and all classes will have object as a base.






From jpager at cox.net  Sat May 24 02:12:28 2008
From: jpager at cox.net (Jeremy Pager)
Date: Fri, 23 May 2008 23:12:28 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<2235cb81-cc56-404e-978b-35c2b09c976e@34g2000hsh.googlegroups.com>
Message-ID: <op.ubm964rj5eblab@s11757>



On Fri, 23 May 2008 03:21:23 -0700, Ivan Illarionov  
<ivan.illarionov at gmail.com> wrote:

> On 23 ???, 02:20, Brad <b... at 16systems.com> wrote:
>> cm_gui wrote:
>> > Python is slow.
>>
>> It ain't C++, but it ain't a punch card either... somewhere in between.
>> I find it suitable for lots of stuff. I use C++ when performance really
>> matters tho... right tool for the job. Learn a good interpreted language
>> (Pyhton) and a good compiled language (C or C++) and you'll be just
>> fine. Until then, quit bitching.
>
>   It's wrong. Here's why.
>
>   Compare your statement to:
>    "OP:  Humans are weak.
>    "Brad:  They ain't gorillas, but they ain't insects either...
> somewhere in between."
>
>   Python is *not* in between C++ and something else.  It's far ahead
> of them all.  Raw speed is not the most important thing in programming
> languages like raw physical strength is not the most important thing
> in life.
>   Pure Python has less raw speed than most compiled-to-machine-code
> languages, but it doesn't matter.  Python can be extended easily and,
> most important, Python is smart.
>
>   Ivan


Except this conversation is not about whether Python is smart.  It's about  
whether Python is fast, so yes, in the context of this conversation, it  
does matter.


From ivan.illarionov at gmail.com  Fri May 23 15:42:03 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 23 May 2008 12:42:03 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
	<3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com> 
	<69oa1aF33cfteU1@mid.uni-berlin.de>
	<2826a237-a4e7-4aa5-a015-de00ef4ed642@w1g2000prd.googlegroups.com>
Message-ID: <4495496e-908d-4fee-b889-38c235c1c634@j22g2000hsf.googlegroups.com>

On 23 ???, 22:32, Jimmy <mcknight0... at gmail.com> wrote:
[...]
> however, how can I just simply know a key is pressed?

If you are on Linux, use XLib
http://python-xlib.sourceforge.net/

You need to catch the KeyPress or KeyRelease X events.
while 1:
    ev = display.next_event()
    if ev.type == X.KeyPress:
        key_code = ev.detail
        ....
    ....

Ivan



From gagsl-py2 at yahoo.com.ar  Tue May 13 06:38:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:38:40 -0300
Subject: threads problem in python
References: <48296275.9090602@al.com.au>
Message-ID: <op.ua286qwbx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <stanc at al.com.au> escribi?:

> I have 2 classes in python, the first one runs first and and then the  
> first one calls the second class. I want it to run the second class as a  
> separate thread but I want the first one to wait until the second class  
> is dead.
> Im having problem in both killing the second class when its done and  
> making the first class wait for it to finish.
> Im very confused on doing threads in python.

I'm confused trying to understand your requirements too. "run a class?"
Threads execute code, it's easier to think of them as *functions* that are  
executed at the same time (or almost).
So you have a function A that runs first, and creates a second thread that  
will execute function B. Then A will wait for B to finish. What do you  
want to do in A while it's waiting? Nothing? Then why to use a second  
thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt  
and others have specific ways to execute backgroung tasks while keeping  
the user interface responsive - you should tell us which one you're using  
in that case.

-- 
Gabriel Genellina



From ankitanand1986 at gmail.com  Wed May 28 06:25:20 2008
From: ankitanand1986 at gmail.com (Ankit)
Date: Wed, 28 May 2008 03:25:20 -0700 (PDT)
Subject: Flash Decoder
Message-ID: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>

Hi everyone,i wanted to build a flash decoder using python can
somebody tell me which library to use and what steps should i follow
to make a flash(video) decoder?By a decoder i mean that i need to
display all the pixel values of each frame.Waiting for your replies.


Regards
Ankit Anand


From aquagnu at gmail.com  Fri May 23 21:31:25 2008
From: aquagnu at gmail.com (Yosifov Pavel)
Date: Fri, 23 May 2008 18:31:25 -0700 (PDT)
Subject: Unhandled exceptions checking
Message-ID: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>

Does somebody know existent tool for checking unhandled exceptions?
Like in Java when method throws exception but in code using this
method, try...catch is missed. May be something like PyChecker?

--
/Pavel


From notbob at nothome.com  Sat May 10 13:22:50 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 17:22:50 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
Message-ID: <KRkVj.1700$_01.929@fe091.usenetserver.com>

On 2008-05-10, Diez B. Roggisch <deets at nospam.web.de> wrote:
> notbob schrieb:

>> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
>> dir, same permission, etc. 
>
> I'm pretty sure you misse the correct shebang - 

Sorry.  Both exactly the same.  I checked 5 times.

helloworld shebang:  #!/usr/bin/python
while shebang:       #!/usr/bin/python

(above yanked from respective scripts)

nb


From bj_666 at gmx.net  Wed May 14 02:37:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 May 2008 06:37:55 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<mailman.929.1210473312.12834.python-list@python.org>
	<4829cac1$0$34550$742ec2ed@news.sonic.net>
Message-ID: <68vfm3F2v0piaU2@mid.uni-berlin.de>

On Tue, 13 May 2008 10:20:41 -0700, John Nagle wrote:

> Matt Nordhoff wrote:
>
>> Well, you should use "xrange(10)" instead of "range(10)". 
> 
>    CPython really is naive.  That sort of thing should be a
> compile-time optimization.

It's not naive, it can't know at compile time what object is bound to the
name `xrange` at runtime.

Ciao,
	Marc 'BlackJack' Rintsch


From pakodagu86146 at hotmail.com  Fri May  9 11:18:57 2008
From: pakodagu86146 at hotmail.com (pakodagu86146)
Date: Fri, 9 May 2008 11:18:57 -0400
Subject: No one will ever know
Message-ID: <BLU102-DAV122CA421CAC04596A104B6F0D30@phx.gbl>

You will not find a better watch copy for less

Every type and style

http://cunidezetoc62.blogspot.com




From vbgunz at gmail.com  Wed May 14 11:24:18 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 08:24:18 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
Message-ID: <b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>

> > An instance method works on the instance
> > A Static method is basically a function nested within a class object
> > A class method is overkill?
>
> If anything, a static method is overkill...
> class Foo:
>
> ? ?@classmethod
> ? ?def register(cls, listener):
> ? ? ? ?cls.LISTENERS.append(listener)

When I learned about static methods, I learned they're a way to
tightly couple some functionality with a class without tying the
functionality to any of the instances. I see them as nothing more than
a design decision. To me they make some sense.

Other than a methods signature (classmethod(cls, l) and a
staticmethod(l)) a class method does anything that a static method
does and gets the CLS reference for FREE? Is this why a static method
is considered to be overkill? In other words, either one can be called
from either the class or the instance and both work pretty much the
same *but* only the class method includes the class for reference and
the static method does not?

The only real difference I see between an instance and either a class
or static method is the whole bound/unbound thing. Otherwise, even an
instance can do what the others do *just* the instance method can only
make those calls through an instance and not the class.

Instance methods make the most sense. A static method makes sense too
*but* I can see how a class method not only does what a static method
does but how a class method *also* gets the cls reference for free.

Am I correct?


From notbob at nothome.com  Wed May 21 17:30:39 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:30:39 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<a7ae43da-7ce4-44e5-827e-db3289e0ddf6@e39g2000hsf.googlegroups.com>
Message-ID: <3w0Zj.205$y_.122@fe091.usenetserver.com>

On 2008-05-21, Carl Banks <pavlovevidence at gmail.com> wrote:

> If you just want to write a simple blog, PHP is probably good enough.
> It's undeniably easier to jump into web programming with PHP--
> partially because of it's widespread support and straightforward
> usage, partially because Python web solutions tend to aim for
> separability of content and presenation which raises the bar for
> entry--and that could easily outweigh your concerns over quality of
> the language.
>
> (Incidentally: if you didn't want to start a religious war, it would
> have been better if you had posted it separately to the two groups.
> Lots of flamewars start by one person posting a cutdown not intended
> for the ears of the other group.)

Yeah, but years of usenet have taught me how to navigate the battlefield.
Your top paragraph above is the kind of advice I'm looking for.  Thank you.

nb


From jarausch at igpm.rwth-aachen.de  Tue May 20 06:25:36 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 12:25:36 +0200
Subject: compressing short strings?
In-Reply-To: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <69fn92F329s6vU2@mid.dfncis.de>

Paul Rubin wrote:
> I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
> 
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
> 

I'd ask in comp.compression where the specialists are listening and who are
very helpful.


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From ivan.illarionov at gmail.com  Sun May 25 20:07:16 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 00:07:16 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
Message-ID: <g1cuvj$1rpd$1@news.mtu.ru>

On Sun, 25 May 2008 16:23:12 -0700, NC wrote:

>> I didn't say that it's not possible to write good code in PHP,
> 
> Indeed you didn't.  You did, however, say that development in Python/
> Django is inherently faster than development in PHP (your exact words
> were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
> 50-fold difference).  This claim has just been obliterated using the
> example you (not I) provided; my estimate of two man-years for
> developing WordPress turns out to be fairly close to what has actually
> gone into the development of Byteflow.  In other words, so far we have
> discovered no evidence of Python's (or PHP's, to be fair) superiority in
> terms of developer's productivity.

In this case (excellent blogging tool), yes, I agree.

>> IMHO Python language is better designed
> 
> That is indeed a matter of opinion.  You like (among other things)
> immutable strings, the off-side rule, the idea that everything is an
> object, and the fine distinction between mutable lists and immutable
> tuples, and I have no problem with you liking these features, as long as
> you agree that other people may have reasons to like the alternatives
> better.

I agree. We like different things and it's good.

>> Yes, it's possible to write something clean in PHP but it would require
>> a lot more work.
> 
> In my opinion, it wouldn't, and in my experience, it doesn't.  All you
> need is to actually put a designer in charge of design.  Additionally,
> there are situations (rapid prototyping, for example) when
> maintainability (the requirement behind the "clean code") is simply not
> a concern.

It's hard to me to write good PHP. I feel happy programming in Python and 
I felt very unhappy when I had to program in PHP.  I'm glad that you have 
a different experience.

Ivan



From castironpi at gmail.com  Wed May  7 20:32:10 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:32:10 -0700 (PDT)
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<mailman.728.1210197111.12834.python-list@python.org>
Message-ID: <e06b0787-4532-48f5-b81b-5e97b489d918@56g2000hsm.googlegroups.com>

On May 7, 4:51?pm, Michael Torrie <torr... at gmail.com> wrote:
> Martin Sand Christensen wrote:
> > Why don't
> > generators follow the usual eager evaluation semantics of Python and
> > immediately execute up until right before the first yield instead?
>
> A great example of why this behavior would defeat some of the purpose of
> generators can be found in this amazing PDF presentation:
>
> http://www.dabeaz.com/generators/Generators.pdf
>
> > Giving generators special case semantics for no good reason is a really
> > bad idea, so I'm very curious if there is a good reason for it being
> > this way. With the current semantics it means that errors can pop up at
> > unexpected times rather than the code failing fast.
>
> Most assuredly they do have good reason. ?Consider the cases in the PDF
> I just mentioned. ?Building generators that work on the output of other
> generators allows assembling entire pipelines of behavior. ?A very
> powerful feature that would be impossible if the generators had the
> semantics you describe.
>
> If you want generators to behave as you suggest they should, then a
> conventional for x in blah approach is likely the better way to go.
>
> I use a generator anytime I want to be able to iterate across something
> that has a potentially expensive cost, in terms of memory or cpu, to do
> all at once.

The amount of concentration you can write in a program in a sitting
(fixed amount of time) is kind of limited.  Sounds like @greedy was
the way to go.  The recall implementation may have a short in the
future, but isn't functools kind of full?  Has wraptools been
written?  Is it any different?

Naming for @greedy also comes to question.  My humble opinion muscles
glom on to @early vs. @late; @yieldprior; @dropfirst; @cooperative.
Thesaurus.com adds @ahead vs. @behind.



From bj_666 at gmx.net  Thu May  8 09:15:16 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 May 2008 13:15:16 GMT
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<e89b68f9-1e35-4549-a3ec-7e68e49f5c80@l42g2000hsc.googlegroups.com>
Message-ID: <68gcn4F2su97jU1@mid.uni-berlin.de>

On Thu, 08 May 2008 04:17:01 -0700, s0suk3 wrote:

> Are you a newbie to Python, or to programming in general? I'll assume
> you are a newbie to programming in general because of that last
> question you asked. Things in Python are easier than in almost any
> other programming language. Here are three Hello World programs:

Counterexamples for quite short "greetings" in other programming languages:

(Free)BASIC::

  Print "Hello World!"

OCaml::

  print_string "Hello World!" ;;

Io::

  "Hello World!" linePrint

Haskell::

  main = putStrLn "Hello World!"

Ciao,
	Marc 'BlackJack' Rintsch


From bj_666 at gmx.net  Wed May 14 02:04:27 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 May 2008 06:04:27 GMT
Subject: Literate programs in Python
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
Message-ID: <68vdnbF2v0piaU1@mid.uni-berlin.de>

On Tue, 13 May 2008 08:28:00 -0700, Paul Miller wrote:

> Alternatively, does anyone know of any literate programming tools which
> support Python well?

There's PyLit_.  It uses reStructuredText_ and can translate between a
reStructuredText with code blocks and source code with the text as
comments in both directions.

.. _PyLit: http://pylit.berlios.de/
.. _reStructuredText: http://docutils.sourceforge.net/

Ciao,
	Marc 'BlackJack' Rintsch


From robin at reportlab.com  Mon May 19 12:24:24 2008
From: robin at reportlab.com (Robin Becker)
Date: Mon, 19 May 2008 17:24:24 +0100
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <4831A9B8.9050101@chamonix.reportlab.co.uk>

Vicent Giner wrote:
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
.......
> 
I programmed several large optimization problems in python. Mostly I used the 
old numeric extension for the optimization parts eg vector calculations matrix 
inversions etc etc, but I think numpy is used now. Since most of the work was 
performed in the C extension we didn't really notice the 'slowness' of python's 
interpreter.
-- 
Robin Becker



From yves at zioup.com  Mon May 12 23:21:06 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Tue, 13 May 2008 03:21:06 GMT
Subject: anonymous assignment
In-Reply-To: <87d4ns6nq5.fsf@benfinney.id.au>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no> <87d4ns6nq5.fsf@benfinney.id.au>
Message-ID: <CO7Wj.264439$pM4.238124@pd7urf1no>

Ben Finney wrote:

>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>> But you still have have a variable that's using memory for nothing.
> 
> No, you have one extra unused name binding. The values that you don't
> want to use have *already* been allocated by the time the above
> statement is executed. Name binding doesn't copy the values, it merely
> binds a name to them. There's no "variable" in the above statement.
> 

But if this happens in the main part of your script, it could take a long 
time before this binding disapear, therefore, the gc won't be able to clean 
that one up. In this particular case, it doesn't really matter (small size), 
but imagine in a case where we are talking of a list of list, with 
potentially large element in the list.


Yves.


From stodge at gmail.com  Fri May  2 20:36:10 2008
From: stodge at gmail.com (Stodge)
Date: Fri, 2 May 2008 17:36:10 -0700 (PDT)
Subject: Boost::Python - Question about object ownership and lifetime
Message-ID: <2eaa8cb1-bf88-4851-a933-19d1b692c6c7@d45g2000hsc.googlegroups.com>

Hi folks, new to Boost Python and struggling to build a prototype at
work. I thought I'd start with a conceptual question to help clarify
my understanding. I already have a basic prototype working nicely but
I'm having a few issues, which I may post about later.

A brief functional rundown of what I'm trying to prototype. Hopefully
my explanation doesn't get too confusing!

I'm embedding a python module into an application; Python will provide
application logic, responding to events such as timers expiring or the
user clicking widgets.

I have the following classes I'm exporting to Python:

Entity, DerivedEntity, EntityList (contains pointers to Entity).

They all have varying types of copy/constructors, e.g. some are
private, some have non-const copy constructors etc. It's inherited
code that I can't mess with so I'm stuck with it.

So the typical logic flow I'm looking at is:

C++ Application:

- Create an instance of EntityList called entity_list, populate with
many instances of DerivedEntity.
- Create an instance of EntityList called change_list
- Invoke python function passing entity_list and change_list as
parameters

Python:

- For each entity in entity_list:
    - Invoke C++ function clone_entity, pass entity as parameter

    C++ Application:

    - Create clone of entity like this --> DerivedEntity* entity_copy
= new DerivedEntity(entity)
    - return entity_copy to Python

Back in Python again:

    - Apply logic to entity_copy returned from clone_entity C++
function
    - If entity_copy updated add to change_list

Back in C++ Application:

- For each new_entity in change_list
    - Apply further logic to new_entity
    - Delete new_entity pointer
- Clear the change_list

I'm having problems in my prototype - it looks like I have a memory
leak but I'm not sure where. So my question is, what should I be aware
of in this logic flow with regards to object ownership and lifetime?

When I receive entity_copy in Python, returned from clone_entity, what
happens to this object when I insert it into change_list and
subsequently delete the C++ pointer? I don't know how to prove that
the Python object is being deleted and isn't hanging around due to a
lifetime issue,

I guess my main problem is that I'm entirely sure I understand object
ownership - who owns what object when it's created in C++, passed to
Python and then returned back to C++ to be deleted.

So if any of this makes sense, I would greatly appreciated any
suggestions or help. I'm very impressed with Boost Python so far but
my own lack of understanding is holding me back I think.

Thanks again
Mike


From pupeno at pupeno.com  Thu May 15 19:20:08 2008
From: pupeno at pupeno.com (=?ISO-8859-1?Q?J=2E_Pablo_Fern=E1ndez?=)
Date: Thu, 15 May 2008 16:20:08 -0700 (PDT)
Subject: ElementTree and DTDs
Message-ID: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>

Hello,

Is ElementTree supposed to load DTDs? I have some xmls heavy on
entities and it fails this way:

Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> filename = "revo/xml/a.xml"
>>> import xml.etree.ElementTree as ET
>>> ET.parse(filename)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 862, in
parse
    tree.parse(source, parser)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 586, in
parse
    parser.feed(data)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in
feed
    self._parser.Parse(data, 0)
  File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1201, in
_default
    self._parser.ErrorColumnNumber)
xml.parsers.expat.ExpatError: undefined entity &jcirc;: line 13,
column 10
>>> import xml.etree.cElementTree as ET
>>> ET.parse(filename)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 45, in parse
  File "<string>", line 32, in parse
SyntaxError: undefined entity &c_j;: line 46, column 17

Thanks.


From d.a.abernathy at gmail.com  Wed May 14 15:25:45 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 14 May 2008 12:25:45 -0700 (PDT)
Subject: Using the indent method
Message-ID: <ffbc75e3-612b-4195-b9c1-11df9e66d286@f63g2000hsf.googlegroups.com>

Hello All,

I am using elementtree to write an XML document and I am having a hard
time adding the correct indentation.
I have tried using the indent method, but I can not figure out how to
use it. Any suggestions.


From philr at aspexconsulting.co.nz  Wed May 28 16:47:08 2008
From: philr at aspexconsulting.co.nz (Phil Runciman)
Date: Thu, 29 May 2008 08:47:08 +1200
Subject: FW: php vs python
Message-ID: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>



-----Original Message-----
From: Jerry Stuckle [mailto:jstucklex at attglobal.net] 
Sent: Wednesday, 28 May 2008 1:48 p.m.
To: python-list at python.org
Subject: Re: php vs python

Ivan Illarionov wrote:
> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>>> Yes, they can. But it may be harder to do for them in one language
and
>>> easier in another.
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good
code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

Yes it does matter. 

I have programmed in many assembly and higher level languages. 

In OldenTimes:
In Algol 60 I was productive from the start.
KDF9 Usercode (Assembly) was brilliant. (A bigger HW stack would have
made it even better).
IBM 360 Assembly was poorer but not a disaster.
PL1 was a mess. You could write good code but why bother?
COBOL was fit for purpose and when combined with Jackson structured
programming could be used straight away by rooky programmers in business
systems programming. I am sure it has progressed since ANSI 68.

The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have DSLs
if language does not matter?

My 2c worth.




From shiningsandy at gmail.com  Tue May 20 03:04:13 2008
From: shiningsandy at gmail.com (sandeep)
Date: Tue, 20 May 2008 00:04:13 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com> 
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com> 
	<1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>
Message-ID: <2598173e-356e-49b8-8875-00556f5cfe98@j33g2000pri.googlegroups.com>

hi all

thanks for ur replies. i have a bit closer look at my code and i am
able to fix the problem.now my exe is working fine.the code is bit
more cleaner now as i removed lot of unused function from it and try
to document it also.


import win32com,win32com.client
import os,os.path
import codecs
import zipfile

#@Author:::Sandeep Kumar Sharma

#outlook application refrence
outlook_app=0
#outlook ids to access different folders look into msdn for more info.
not a preffered way as i am hardcoding data here
OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
4,'olFolderSentMail':5,'olFolderServerFailures':
22,'olFolderSyncIssues':20,'olFolderTasks':
13,'olPublicFoldersAllPublicFolders':18}
#outlook types to save mailItem look into msdn for more info
#although doesnot work for me :-(
OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};

#refrence to content in inbox
inbox_obj=0

#function which will initialise outlook and return its reference
def getAppRef():
    temp=win32com.client.Dispatch("OutLook.Application")
    return temp.GetNamespace("MAPI")

#function to return the folders in the outlook
def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
    return a.GetDefaultFolder(b)

#function to get email content
def getMailContent(obj):
    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
    emailData=""
    for kk in range(len(obj.Items)-1,0,-1):
        print 'writting file='+str(kk)
        mailItem=obj.Items[kk]
        emailData=emailData+getEmailData(mailItem)
        saveAttachments(mailItem.Attachments)
    txt_file.write(getHTMLString(emailData))
    txt_file.close()

#function which will return the emailItem data as form of String
def getEmailData(mailItem):
    data="<p>"
    sender='<h4>SenderName</
h4>'+checkStringType(mailItem.SenderName)
    time='<br><h4>Time</
h4>'+checkStringType(str(mailItem.ReceivedTime))
    attachment='<br><h5>Attachments Count</
h5>'+str(len(mailItem.Attachments))
    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
p><hr/>"
    dataToWrite=data+sender+time+attachment+edata
    return dataToWrite

#function for saving the attachment.we are calling attachments
SaveAsFile to save the attachment.
#SaveAsFile is com method.for more info dig into msdn :-)
def saveAttachments(atmts):
    for kk in range(1,len(atmts)):
        atmt=atmts[kk]
        abc=os.path.isdir(os.getcwd()+'\email')
        if(abc==True):
            print 'directory exists'
        else:
            os.mkdir(os.getcwd()+'\email')
        path=os.path.abspath(os.getcwd()+'\email')
        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)

# function to check whether the character encoding is ascii or smthing
else
def checkStringType(a):
    if isinstance(a,str):
       b='not a unicode string'
    else:
        a.encode('utf-8')
        #print 'unicode type'
    return a

#bit of html stuff so that i can see my output on browsers.
def getHTMLString(emailData):
    a='<html><head><title>Your Email Data log is here</title></
head><body>'+emailData+'</body></html>'
    return a

#main entrance to the program
def main():
    global outlook_app,inbox_obj
    outlook_app=getAppRef()
    inbox_obj=getOutLookFolders(outlook_app)
    getMailContent(inbox_obj)

main()

once again thanks for your help.

thanks and regards
sandeep kumar sharma


From matthieu.brucher at gmail.com  Sun May 18 03:55:57 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sun, 18 May 2008 09:55:57 +0200
Subject: Python library for clustering from distance vector
In-Reply-To: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
References: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805180055jcc0de01s92b4c03187b533d9@mail.gmail.com>

Hi,

You should send your question on the scipy user ML. If you use a distance
between objects, you can try the kmeans (implemented in scipy), if you use
similarities, you can change them to dissimilarities and use the same
function.

Matthieu

2008/5/18 Sengly <Sengly.Heng at gmail.com>:

> Dear all,
>
> I am looking for a python library which can cluster similar objects
> into their respective groups given their similarity score of each two
> of them. I have searched the group but I couldn't find any helpful
> information yet.
>
> Any suggestion is appreciated. Also, if you know any specific group
> that I should post this message, please also suggest.
>
> Thank you.
>
> Sengly
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From dullrich at sprynet.com  Sat May 24 07:12:35 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 24 May 2008 06:12:35 -0500
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<89be7f59-4c08-4739-ab07-d310e0c6aef3@2g2000hsn.googlegroups.com>
Message-ID: <rrtf34pi4vb87pjf86mk6s2tii3ni54oa3@4ax.com>

On Fri, 23 May 2008 14:00:33 -0700 (PDT),
"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> wrote:

>On 23 mai, 10:42, "inhahe" <inh... at gmail.com> wrote:
>> "Bruno Desthuilliers" <bruno.42.desthuilli... at websiteburo.invalid> wrote in
>> messagenews:4836772e$0$6097$426a74cc at news.free.fr...
>>
>> > Brad a ?crit :
>> >> cm_gui wrote:
>> >>> Python is slow.
>>
>> >> It ain't C++, but it ain't a punch card either... somewhere in between. I
>> >> find it suitable for lots of stuff. I use C++ when performance really
>> >> matters tho... right tool for the job. Learn a good interpreted language
>> >> (Pyhton) and a good compiled language (C or C++)
>>
>> > LordHaveMercy(tm). Could you guys please learn what you're talking about?
>>
>> > 1/ being interpreted or compiled (for whatever definition of these
>> > terms) is not a property of a language, but a property of an
>> > implementation of a language.
>>
>> That's like saying being spherical is not a property of planets, it's a
>> property of an instanciation of a planet.
>
>I do definitively not have the required knowledge to say anything
>about "being spherical" being part of the definition of what a
>"planet" is or not.

I wasn't going to mention this since it's really not relevant,
but since you raise the question: Actually it was a bad analogy
because being roughly spherical _is_ part of the definition of
"planet". (Of course "spherical" must mean "roughly spherical"
here, since no planet is exactly spherical.)

A little while ago when Pluto got demoted so it's no longer
officially a planet they came up with a definition - part of
the definition is that the body is large enough that gravity
causes it to assume a spherical shape.

>>, and b) It's a far cry to
>> imagine a planet coming into being that's not spherical
>
>Idem
>
>>  (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
>Now this I can tell is false. The problem is not that it's difficult
>to "make a native compiler for" dynamic languages, the problem is that
>it's difficult to write native compiler for dynamic languages that
>generates code that beats the VM/byte-code interpreter/whatever you
>name it to be wotrh the effort.
>
>> I guess I
>> should also mention that Python isn't very practical (as in "suitable",
>> "right tool for the job", and "perfomance", as mentioned in the above post)
>> without an implementation.
>
>That is debatable. There are algorithm courses taught in "pseudo-code"
>- that is, a language that doesn't have any known implementation.
>
>> So I don't think this distinction has any use
>> other than to beat other people over the head with a bat.
>
>Ok, *you* know this - I mean, the distinction between a language and a
>language's implementation(s).  Are you sure everyone saying - or
>reading - assertions such as "language XXX is slow" or "compiled
>languages are faster" etc really know what they're talking about ?
>
>> > 2/ actually, all known Python implementations compile to byte-code.
>>
>> Which is then interpreted, but you're still technically right, because
>> "compiled" can mean either compiled to bytecode or compiled to native code,
>> despite what it actually did mean.  Semantics FTW!!
>
>Yes, semantics. But a bit more than semantics - byte-code interpreters
>are usually way faster than "pure" interpreter, and start to be fast
>enough for quite a lot of practical use.
>
>Ok, I'll stop on this - once again, sorry for the noise, and please
>bear with me, I tend to be a bit too much on the pedantic side
>sometimes. But still, thanks to the pedantics peoples on usenet that
>taught me so much so far and still teach me more and more...

David C. Ullrich


From stef.mientki at gmail.com  Sat May 10 15:55:26 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 10 May 2008 21:55:26 +0200
Subject: Any other UI kits with text widget similar to that in Tk?
In-Reply-To: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>
References: <6FB1E771-8D66-46FD-9E08-0E32C5E85936@sbcglobal.net>
Message-ID: <4825FDAE.1050903@gmail.com>

Kenneth McDonald wrote:
> I'm wondering if any of the other GUI kits have a text widget that is 
> similar in power to the one in Tk. wxWindows, from what I can tell, 
> doesn't offer nearly the options the Tk widget does. I'm less familiar 
> with Qt. Any feedback would be most appreciated.
>
> Thanks,
> Ken
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
Don't know what the power of tk is,
but wxPython has the powerfull Scintilla and a less sophisticated 
richtext on board.

cheers,
Stef


From sarenius at sun3.oulu.fi  Sun May 25 15:34:08 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:34:08 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi> <4839BEF6.3060209@behnel.de>
Message-ID: <slrng3jfpg.hio.sarenius@sun3.oulu.fi>

In article <4839BEF6.3060209 at behnel.de>, Stefan Behnel wrote:
>Vesa-Matti Sarenius wrote:
>> This did not work. Neither did commenting all print lines. The problem is
>> somewhere else.
>
>As Tim said, the line number that the exception prints would help here.

See my followup... 

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *




From beema.shafreen at gmail.com  Sat May 17 01:49:05 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Sat, 17 May 2008 11:19:05 +0530
Subject: set function
Message-ID: <aa405c1f0805162249u45280c76v82f72daa0a748635@mail.gmail.com>

Hi all,
I need to find the intersection of 10 different files with ids defined as
a_items, b_items and so on

common_items = a_items&b_items&c_items&\
               d_items&e_items&f_items\
               &g_items&h_items&i_items&j_items

i have included above line in the script
is this an right way will my program accept it or what are the other option
to compare 10 different such items
-- 
Beema Shafreen
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From wizzardx at gmail.com  Wed May  7 03:13:06 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:13:06 +0200
Subject: How do you debug memory usage?
In-Reply-To: <d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>
References: <mailman.652.1210080485.12834.python-list@python.org>
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com>
	<mailman.678.1210108782.12834.python-list@python.org>
	<d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>
Message-ID: <18c1e6480805070013l1a4ef751s949cf64222f473c0@mail.gmail.com>

>  Rsync uses a lot of memory:
>    http://www.samba.org/rsync/FAQ.html#4
>  rdiff-backup uses librsync, not rsync.
>  I'm not sure if rsync uses librsync, but one could speculate that
>  they share some code and perhaps some of the same problems.
>  But 2GB seems excessive unless you are dealing with millions of files.
>  A memory leak seems more likely.
>

Thanks for your input. In case you're interested here's a link to my
post to a local Linux user group:

http://lists.clug.org.za/pipermail/clug-tech/2008-May/040532.html

David.


From pavlovevidence at gmail.com  Mon May 12 00:32:13 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 11 May 2008 21:32:13 -0700 (PDT)
Subject: Convention for name indicating "don't care about the value" (was:
	Is using range() in for loops really Pythonic?)
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com> 
	<8763tk89zu.fsf_-_@benfinney.id.au>
Message-ID: <34706c6d-108b-418d-9033-1beb72d6599c@k13g2000hse.googlegroups.com>

On May 11, 11:41 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > On May 11, 6:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > In such cases, the name 'dummy' is conventionally bound to the items
> > > from the iterator, for clarity of purpose::
>
> > >     for dummy in range(10):
> > >         # do stuff that makes no reference to 'dummy'
>
> > Is this documented?
>
> It's not a documented standard, to my knowledge.
>
> > I've never heard of this convention. It's not PEP 8, and I've never
> > seen consistent usage of any name. I'd be interested in knowing
> > where you read that this was a convention, or in what subcommunities
> > it's a convention in.
>
> It has been in this forum that the use of the name '_' for "don't care
> about the value" was deprecated, since that name is already overloaded
> with other meanings.

That doesn't follow at all from what you wrote: no one in this thread
had even mentioned the usage of "_" for unused values--how did you
expect us to know you were talking about something no one brought up?

So it seems that usage of "dummy" is not a convention, and avoidance
of "_" is not really a convention except on this group.


> > I think dummy is a terrible name to use for this, since in no other
> > usage I can think of does the word "dummy" suggest something isn't
> > used.
>
> I think it's far superior to '_'. I'd be just as happy with any other
> name that explicitly distinguishes itself for this purpose.
>
> > If a value isn't used, then I think the most clear name for it is
> > "unused".
>
> Sounds good to me. Now we merely need to convince the world.

I'm happy to discourage the world from using "_" for this purpose;
ambivalent whether you even need to use a specific name.


Carl Banks


From inhahe at gmail.com  Fri May 16 10:43:58 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:43:58 -0400
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<695jdlF30fp0gU1@mid.uni-berlin.de>
Message-ID: <b3hXj.4845$Kk3.4719@bignews9.bellsouth.net>

Well the problem is that I'm actually not an assembler guru, so I don't know 
how to implement a dll in asm or use a c calling convention, although I'm 
sure those instructions are available on the web.  I was just afraid of 
trying to learn that AND making python-specific extensions at the same time. 
I thought of making a c extension with embedded asm, but that just seemed 
less than ideal.  But if somebody thinks that's the Right Way to do it, 
that's good enough..

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:695jdlF30fp0gU1 at mid.uni-berlin.de...
> inhahe schrieb:
>> Can anyone give me pointers/instructions/a template for writing a Python 
>> extension in assembly (or better, HLA)?
>
> You could write a C-extension and embed assembly. See the docs for how to 
> write one. If you know how to implement a C-callingconvention-based shared 
> library in assembly (being an assembler guru you sure know how that 
> works), you could mimic a C-extension.
>
> Diez 




From zapwireDASHgroups at yahoo.com  Tue May 27 16:21:52 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:21:52 -0700
Subject: Weird exception in my, um, exception class constructor
Message-ID: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>

I have a generic (do nothing) exception class that's coded like this:

class MyError(exceptions.Exception):
    def __init__(self,args=None):
        self.args = args

When I attempt to raise this exception via 'raise MyError' I get an exception 
within the MyError constructor __init__ as follows:

Traceback (most recent call last):
[lines deleted]
  File "c:\Documents and Settings\Joel.Kolstad\My Documents\Python\
MyStuff.py", line 7, in __init__
    self.args = args
TypeError: 'NoneType' object is not iterable

Ummm... why should 'args' have to be iterable anyway?  I don't understand 
what's going on here?  Could someone help me with this?

I've found empirically that I can write:

    if args self.args = args

...and everything *appears* to work OK, but I'd really like to know what the 
core problem is.

Thank you,
---Joel





From znfmail-pythonlang at yahoo.com  Tue May 20 12:04:27 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Tue, 20 May 2008 12:04:27 -0400
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org> <g0sbns$a5i$1$8300dec7@news.demon.co.uk>
Message-ID: <g0usqg$oka$1@aioe.org>

Thank you and the other responders have given me something to consider, I 
understand the concept of the posterize idea and will be experimenting with 
that.

I wanted to respond to this statement below which is true, however I believe 
the histogram sums the values so both colors would be in bin 229.  I say 
that because all white is in histogram element 767, while black is in 
element 0. Anyone on this list know how to interpret the histogram list? 
Your point is still valid regardless of my interpretation.

> So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
> the bin for G=27. But they are very different colours.

I will be checking out the SIG for PIL thanks for that pointer.



"Ken Starks" <straton at lampsacos.demon.co.uk> wrote in message 
news:g0sbns$a5i$1$8300dec7 at news.demon.co.uk...
>I would still be concerned that you are checking against the percentage
> of the 768 bins returned by the histogram method. Two pixels of
> widely different colour end up in the same bin, so long as just ONE
> of the Red, Green, or Blue components is equal.
>
> So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
> the bin for G=27. But they are very different colours.
>
> There are actualy 256 * 256 * 256 colours, but I don't suppose
> you want that many bins!
>
> What you want is a much smaller number of bins, with pixels
> of 'close' colours (whatever that means) put into the same bin.
>
> What 'close' means for colours, is quite a difficult thing, and
> the consensus is that using the three RGB coordinates is not
> as good as certain other colour spaces.
>
> You could use the ImageOps.posterize method to reduce the number of 
> colours in the image, but whether 'close' colours end up together,
> I don't know.
>
> You might try the PIL special interest group (SIG) 'image-sig'
>
> http://mail.python.org/mailman/listinfo/image-sig
>
> (If you want to know exactly how many unique colours an image actually
> has, load the image into the 'GIMP' assuming you have it,
> and go to :
>
> Menubar --> Filters --> Colours --> Colourcube analysis...
>
> )
>
>
>
>
>
>
>
>
>
>
> Poppy wrote:
>> Thanks, since posting I  figured out how to interpret the histogram 
>> results, which seems to be the consensus in responses. I wrote a check 
>> image program and have been periodically calling it against a folder 
>> where I make a copy of our images used for production. My method right 
>> now is to check what we send for errors, but is not preventive.
>>
>> Also I determined whitespace is not the only issue, any color that 
>> dominates. I'm considering rewriting this code below to setup bins, so if 
>> combined neighboring colors exceeds the threshold then reject the image. 
>> I have examples where half the image appears black, but actually varies 
>> throughout.
>>
>> Since my image is RGB I'm looping through a 768 element list.
>>
>> Zach-
>>
>> import Image, os
>>
>>
>> def check_image(file):
>>
>>     try:
>>         im = Image.open(file)
>>     except:
>>         return "Can't open file %s " % file
>>
>>     imData = im.histogram()
>>     i = 0
>>     for ea in imData:
>>         if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
>>             return "bad image %s - %s element num is %s " % (file, ea, 
>> str(i))
>>         i = i + 1
>>
>>     return "good image %s, image size is %s" % (file, im.size)
>>
>>
>> def main(dir):
>>     data = ""
>>     try:
>>         files = os.listdir(dir)
>>         for ea in files:
>>             data = data + str(check_image(os.path.join(dir,ea))) + "\n"
>>     except:
>>         return "Can't get files in %s" % dir
>>     return data
>>
>> print main("\\\\host\\path\\to\\image_folder\\")
>> 



From pyn3wb at pyn3wb.com  Mon May 12 16:00:52 2008
From: pyn3wb at pyn3wb.com (pyn3wb)
Date: Mon, 12 May 2008 20:00:52 GMT
Subject: thread stomp?
Message-ID: <Ul1Wj.2889$hJ1.2323@newsfe17.lga>

class1 (threading.Thread):
	def __init__(self, dir):
		self.dir = dir
		threading.Thread.__init__(self)
	
	def run(self):
		do stuff in dir here...

class2 (threading.Thread):
	def __init__(self, dir, dir2):
		self.file = g
		self.dir2 = dir2
		threading.Thread.__init__(self)

	def run(self):
		do stuff in dir here...
		output to dir2

class main
	for i in dircache.listdir(dir):
		//run over files
		class1(dir).start()

	for j in dircache.listdir(dir2):
		//run over files, dependent on stuff in dir
		class2(dir2).start()

think just using the loops above enough to prevent class2 threads from 
starting before class1 threads done

not true

class2 threads seems to start prior to class1 threads done; class2 
results depend on class1 finish first

any help?


From anand.prabhakar.patil at gmail.com  Thu May 29 14:30:03 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 19:30:03 +0100
Subject: MACOSX_DEPLOYMENT_TARGET mismatch bug on Leopard using system Python
Message-ID: <76716DE1-B3A8-4A40-A73A-D5273400B05A@gmail.com>

Hi all,

I'm getting error messages like

distutils.errors.DistutilsPlatformError: $MACOSX_DEPLOYMENT_TARGET  
mismatch: now "10.3" but "10.5" during configure

on Leopard using system Python when trying to build a third-party  
module. Can this be fixed without installing a different distribution  
of Python? Googling the problem turns up fixes that involve  
configuring source distributions, unless I'm mistaken.

Thanks,
Anand Patil


From gagsl-py2 at yahoo.com.ar  Sat May 10 22:07:58 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 23:07:58 -0300
Subject: Can I "delete" the namespace of a module that i import?
References: <a6a4254d-68d4-4f72-a2f4-e909097e5618@c19g2000prf.googlegroups.com>
Message-ID: <op.uayv7kwnx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 11:06:49 -0300, gbin,Zhou <scuteezgb at gmail.com> escribi?:

>    I see from "http://docs.python.org/tut/node11.html" that "Name
> spaces are created at different moments and have different lifetimes.
> The namespace containing the built-in names is created when the Python
> interpreter starts up, and is never deleted. The global namespace for
> a module is created when the module definition is read in; normally,
> module namespaces also last until the interpreter quits."
>    So can I "delete" the namespace of a module that i import?

You can make Python "forget" a module by removing it from sys.modules; that way, next time you import it, Python will load it again from file.
Or you can use the built-in reload() function to get a "fresh" copy from file.
But any references to objects in the old module will still refer to the old objects (that means, by example, that existing instances of classes defined in the module will still refer to the old definition)

-- 
Gabriel Genellina



From benjamin.kaplan at case.edu  Tue May  6 09:57:41 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 6 May 2008 09:57:41 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805060657i655c9823g42c01d63dce98e1a@mail.gmail.com>

On Tue, May 6, 2008 at 9:44 AM, jmDesktop <needin4mation at gmail.com> wrote:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I believe Python 3 introduces Abstract Base Classes, so you can use that
once it comes out.
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From mail at timgolden.me.uk  Thu May 29 09:53:54 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 14:53:54 +0100
Subject: Finding file details...
In-Reply-To: <2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>	<mailman.1721.1212054906.12834.python-list@python.org>
	<2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
Message-ID: <483EB572.8070400@timgolden.me.uk>

Kalibr wrote:
> On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>> You don't say, but I assume you're on Windows since you mention
>> GetFileVersionInfo (which doesn't have anything to do with media
>> files, by the way) and WMA. There may be packages out there
>> to do all this already but if not you'll need to pull in a few disparate
>> modules and mix'n'match.
>>
>> While ID3 readers (which determine the metadata for MP3) are reasonably
>> common few of them come ready-compiled for Windows. I've used Ned
>> Batchelder's id3reader [1] successfully for simple tasks so you might try
>> that. On the WMA side, you can automate Windows Media Player to get
>> metadata. (And it might work for .mp3; I've not tried).
>>
>> <code>
>> import win32com.client
>>
>> player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
>> wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
>> try:
>>   artist = wmedia.getItemInfo ("Artist")
>> finally:
>>   player.mediaCollection.remove (wmedia, False)
>>
>> print "bells.mp3 has artist", artist
>>
>> </code>
>>
>> You're going to have to dig around for docs on this one. And it's not
>> pretty. Try starting from:
>>
>> http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>>
>> TJG
>>
>> [1]http://nedbatchelder.com/code/modules/id3reader.html
> 
> Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
> and I just assumed that there must be a way to programmatically get
> the stuff you get from choosing properties in the right click menu.

Ah. You didn't quite say that. Well, the thing is that the stuff in
the right-click menu (I think this is the case) comes from several
different sources. Some of it's held in Alternate
Data Streams. Some is Structured Storage within the docs themselves.
Some is simply, eg, ID3 data held in an MP3 file etc. I don't
think it all comes from one place. Again, I think.

> But I guess there isn't (hard to believe, because I can't see MS hard-
> coding each and every file format's metadata into it's OS). I might
> have to learn more about the command prompt ( I hear there is a module
> for fiddling with it) and work from there.

If you come up with useful info, do post back here. It's an area several
people have enquired about.

TJG


From gherron at islandtraining.com  Thu May 15 12:11:23 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 09:11:23 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
Message-ID: <482C60AB.2060406@islandtraining.com>

Marlin Rowley wrote:
> All:
>
> I've got a script that runs really slow because I'm reading from a 
> stream a byte at a time:
>
> // TERRIBLE
> for y in range( height ):
>         for color in range(4):
>             for x in range( width ):
>                 pixelComponent = fileIO.read(4)
>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE 
> float, but we now can do something with that pixel component.
>
>
> I can speed this up dramatically if I did this:
>
> // MUCH FASTER
> for y in range( height ):
>     for color in range(4):
>        pixelComponent = fileIO.read(4*width) <<<<<<<<<  GET a LOT more 
> data from the stream into memory FIRST!!
>        for x in range( width ):
>            buffer = unpack( ?????? ) <<<< how do I get each float from 
> the pixelComponent???

Just carve of the first four bytes of pixelComponent on each pass 
through the loop, and unpack that.

for x in range(width):
  fourbytes = pixelComponent[:4]   # first 4 bytes
  pixelComponent = pixelComponent[4:]  # All but first four bytes
  buffer = unpack("!f", fourbytes)


There are probably better ways overall, but this directly answers your 
question.

Gary Herron


>
>
> -M
> ------------------------------------------------------------------------
> With Windows Live for mobile, your contacts travel with you. Connect 
> on the go. 
> <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From upton at virginia.edu  Mon May 26 15:03:31 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 15:03:31 -0400
Subject: definition of a highlevel language?
In-Reply-To: <c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com>
Message-ID: <5504f9ac0805261203ma4aa57fw3e3a015a950ca315@mail.gmail.com>

On Mon, May 26, 2008 at 2:50 PM, Patrick Mullen <saluk64007 at gmail.com> wrote:
> It basically works like this
>
> low level to high level
>
> machine code
> assembly -> translates to machine code
> c -> compiles to assembly and machine code
> python -> commands interpreted by a vm running on c
>

Alternately, you can think of a pseudo-continuum from low level to
high level, sort of as a function from language lines to assembly
instructions... for instance, I seem to recall reading somewhere that
made the example of BASIC being higher level than C because one
statement in BASIC translated to, on average, 5 assembly instructions,
whereas a C statement translated to, on average, 2.5 assembly
instructions.  Of course, maybe that's not the best metric, because
for instance you might have a comparison between something like Java
and C++ where the individual statement doesn't do any more or less
work (say, creating a new instance of an object), but if you take into
account all of the JVM instructions for intepreting or JITing the
bytecode you'd get a lot higher ratio of assembly instructions to
source statements.


From pataphor at gmail.com  Wed May 21 06:47:44 2008
From: pataphor at gmail.com (pataphor)
Date: Wed, 21 May 2008 12:47:44 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
	<2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>
	<20080520154802.4b5df647@hyperspace>
	<dullrich-C762B6.10401720052008@text.giganews.com>
Message-ID: <20080521124744.17546846@outerspace>

On Tue, 20 May 2008 10:40:17 -0500
"David C. Ullrich" <dullrich at sprynet.com> wrote:

> > > Today's little joke: Long ago I would have solved
> > > this by storing the data as a list of rows and _also_
> > > a list of columns, updating each one any time the
> > > other changed. Just goes to show you things
> > > could always be worse...
> > 
> > Well have I ever ... I only thought about this last week and I
> > actually thought it was a *good* idea. 
> 
> Sorry. If you really want to do this you could keep things
> in sync automatically by writing the appropriate __setitem__
> and resolving never to modify the data except through that...
> 
> def whatever.__setitem__(self, (row,col), value):
>   self.rows[row][col] = value
>   self.cols[col][row] = value
 
Using the trick of encapsulating the values inside single-element lists
one can make a transposition of the matrix and get synchronicity for
the little price of doubling the number of instances. Since the views
share the data this is a lot less expensive than one would think. One
can use the row view or the column view to alter data and the changes
will automatically be visible in the other view, since the views update
the same lists. There is a little notational gotcha, instead of writing
row[0] = [1,2,3] one now must write row[0][:] = [1,2,3] or else
synchronicity is lost.

I found a nice ListMixin class at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440656

Using that I wrote the following proof of concept:

class Storage(ListMixin):

  def __init__(self, seq=[]):
    self.L = [[x] for x in seq] 

  def _constructor(self, iterable):
    return Storage(iterable)

  def __len__(self):
    return len(self.L)

  def _get_element(self, i):
    assert 0 <= i < len(self)
    return self.L[i][0]

  def _set_element(self, i, x):
    assert 0 <= i < len(self)
    self.L[i][0] = x

  def _resize_region(self, start, end, new_size):
    assert 0 <= start <= len(self)
    assert 0 <= end   <= len(self)
    assert start <= end
    self.L[start:end] = [[None] for i in range(new_size)]

def test():
    n = 3
    R = range(n)
    it = iter(range(n*n))
    MR = [Storage(it.next() for i in R) for i in R]
    MC = [Storage() for i in R]
    T = zip(*[x.L for x in MR])
    for x,y in zip(MC,T):
        x.L = y
    print MR
    print MC
    MC[2][:] = 'abc'
    print
    print MR
    print MC
    
if __name__=='__main__':
    test()

Output:

[Storage([0, 1, 2]), Storage([3, 4, 5]), Storage([6, 7, 8])]
[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage([2, 5, 8])]

[Storage([0, 1, 'a']), Storage([3, 4, 'b']), Storage([6, 7, 'c'])]
[Storage([0, 3, 6]), Storage([1, 4, 7]), Storage(['a', 'b', 'c'])]

P.



From castironpi at gmail.com  Mon May 12 21:17:39 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 18:17:39 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<mailman.1009.1210635712.12834.python-list@python.org>
Message-ID: <eb615397-5400-49dd-a2d6-d94ed2bc0957@c65g2000hsa.googlegroups.com>

Anyway, Chuck's post doesn't question any of the competencies of
computer science.  Is it safe to name-call silly, or have -I- by
disdesign misinterpreted?

On May 12, 6:41?pm, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> I'm another one pretty early in his programming education, but here's my take.
> Python was specifically recommended to me by a few people for a
> specific program I wanted to write (userspace, GUI, music). ?While I
> gradually learn more about it, I start to spend a lot of time on
> certain aspects I don't really need for this task. ?I think curiosity
> is one of the vital qualities for a programmer, and through mine, over
> a few years, I've built up more and more understanding of what's going
> on in my box, more than I set out to have, but I can't see how any of
> this can be called wasted time if it rounds out my general
> understanding.
> On the other hand, as Python is about the second "serious" language
> I've tried to learn (the others being web- or music- oriented, and I
> didn't approach them as programming), I don't have much to compare it
> to. ?I was under the impression before reading your message that
> Python was very popular and useful. ?This list is far more active than
> all the others to which I'm subscribed put together! ?So, either it
> doesn't seem like a silly endeavor to learn it for its own sake, or
> they're using it for something.
>
> If it is a silly endeavor, I'm going to have to ask you to stop this
> thread, it's too silly.
>
> -Chuckk
>
>
>
>
>
> On Mon, May 12, 2008 at 8:27 PM, John Salerno <johnj... at nospamgmail.com> wrote:
> > Just something that crosses my mind every time I delve into "Learning
> > ?Python" each night. Does anyone see any value in learning Python when you
> > ?don't need to for school, work, or any other reason? I mean, sure, there's
> > ?value in learning anything at any time, but for something like a programming
> > ?language, I can't help but feel that I will be mostly unable to use what I
> > ?learn simply because I have no reason to use it.
>
> > ?The *process* of learning is enough fun for me, and every now and then I do
> > ?find a small use for Python that really pays off, but for the most part I'm
> > ?wondering what people's thoughts are as far as simply learning it for the
> > ?sake of learning. Does it seem like a silly endeavor to most people? Did
> > ?anyone here learn a programming language when you didn't need to? If so, how
> > ?much and in what capacity did you use it after you learned it?
>
> > ?Hopefully this question even makes sense!
>
> > ?--
> > ?http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com- Hide quoted text -
>
> - Show quoted text -



From cokofreedom at gmail.com  Wed May 21 11:22:36 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 08:22:36 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
Message-ID: <06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>

On May 21, 4:57 pm, "inhahe" <inh... at gmail.com> wrote:
> one of the few things i miss from C is being able to use assignment in
> expressions.   that's the only thing, really.
> also there's no switch/case, you have to use a dictionary of functions
> instead, although i rarely need that, usually i just use elif.

One thing I hate from C is the assignment in expressions...Forcing
myself to write
0 == Something
rather than
Something == 0
just to make sure I was mistakenly assigning values in statements is
annoying, it ruins the ease of reading.

I kind of agree with the select:case, but I think a key issue is how
to implement it. Elif is reasonable for now.

Diez, true I guess, but then we haven't seen what these expressions
are, and why there has to be three.


From Avowkind at gmail.com  Wed May 28 17:57:57 2008
From: Avowkind at gmail.com (Avowkind)
Date: Wed, 28 May 2008 14:57:57 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<d18e1293-b797-42d0-b02d-02a84f84de8e@w34g2000prm.googlegroups.com> 
	<mailman.1695.1211995991.12834.python-list@python.org>
Message-ID: <193563ba-d377-4401-af95-668dbb44034f@q27g2000prf.googlegroups.com>

On May 29, 5:32 am, Stef Mientki <stef.mien... at gmail.com> wrote:
> Avowkind wrote:
> > On May 27, 6:34 am, notnorweg... at yahoo.se wrote:
>
> >> (might not be the right forum for this but...)
>
> >> what is the definition of a highlevel-language?
>
> >> well there isnt one specifically and wikipedia and the like gives just
> >> a very general description obv you can say it abstracts away lowlever
> >> operations.
>
> >> yes but how?
>
> >> a function like map takes a function and applies it to a list for
> >> example.
> >> this abstracts away a common procedure like iterate through a list and
> >> for every position do a computation.
> >> so it is a higherorderfunction. is this how higher-level-languages are
> >> built?
>
> >> so are they fundamentally differently built or is it just a lot of
> >> lowlevel operations built on top of each other?
>
> >> haskell is considered a very highlevellanguage but can you do
> >> systemsprogramming with it(yes maybe it is very unpractical i dont
> >> know but can you)?
>
> >> is lambda calculus a more abstract and efficient way of modeling a
> >> computer? meaning you start at a higher level of abstraction and can
> >> work up to even higher even faster?
>
> >> how did lispmachines work? was the basic system programmed in LISP?
>
> > A lot of the previous comments have been about levels of abstraction
> > of the programming langauge - which may be the answer you want.
> > Another way of looking at it is that we want to be able to move from
> > the language of the solution domain - e.g. computers, bits and bytes
> > to the language of the problem domain.
>
> > When we think about 'level' we don't just want to look at how basic
> > statements work. we also need to think about whether the language is
> > capable of simply and clearly expressing the problem.
>
> > If your problem domain is mathematics then mathcad and its ilk are
> > near perfect high level programming languages as the programs look
> > just like the problems.
>
> Andrew, that's very good description, and I totally agree !> if your problem domain is controlling a water works then you may tend
> > to write your problem like this:
>
> > if the water level is over 10 metres then start pump
> > if the water level is below 5 metres then stop pump
>
> I would go one step beyond that, and state the problem as:
> "keep the reservoir full, but not too full"> which in python might turn out to be
>
> > if water_level > 10:
> >     pump.start()
> > if water_level < 5:
> >     pump.stop()
>
> > which is fairly close.
>
> And now the solution is less close ;-)
> And it becomes even less close,
> if we extend your solution somewhat more to a real world implementation,
> something like this:
>
> control = True
> while control :
>     if water_level > 10:
>         pump.start()
>     if water_level < 5:
>         pump.stop()
>
> And if you would propose this solution to a control system engineer,
> he/she would say: "this solution works very bad" or even "this solution
> won't work"
> A solution that would work, should incorporate at least a hysteresis and
> could look like this:
>
> control = True
> State   = False
> while control :
>   if State and ( water_level > 10 ) :
>     pump.start()
>     State = not ( State )
>   elif not ( State )  and ( water_level < 5 ) :
>     pump.stop()
>     State = not ( State )
>
> and now what's the resemblance to the orginal problem :
>    "keep the reservoir full, but not too full"
> ;-)
>
> So an adequate high level language,
> should do exactly like a control engineer would do (btw I'm not a
> control engineer):
> 1- asking what do you mean by "full"
> 2- not asking what's the other level,
> but asking what's the intended use: how often and how many water is
> added or used,
> what are the costs of the pump, etc etc
> after which
>    the control engineer
>        or
>   the high level language
> can calculate the optimal hysteresis.> of course with the addition of some brackets C++ could be this clear
> > too. The key though is the abstraction given by the pump class and
> > implicitly by object oriented design.
>
> > In this pattern Form designers, visual web page layout tools and their
> > ilk are very high level - but only if your problem is that you need to
> > design a lot of business forms or web pages.  Some problems are best
> > described visually, some in text, some in mathematics.
>
> I agree that some problems are better described in one or the other form,
> but it's not the major issue.
> e.g. Flowcharts are a perfect high level solution for problems in many
> domains.
> But flowcharts, just like computer languages, visual design languages
> and math,
> are only valuable in the hands of domain experts.
>
> What the major issue is,
>     that makes a computer language or a design environment in general,
> really high level,
> is the availability of the domain expertise.
>
> Therefor the only high level language I'm aware of is ...
> ... LabView
>
> Labview offers a lot of domain expertise in almost any domain,
> so anyone
>   with just a little knowledge of the problem domain,
> and
>   with just a little programming experience or math knowledge,
> can solve any problem in every domain with Labview.
> Possibly I'm exaggerating a bit ;-)
>
> cheers,
> Stef
>
> > Andrew.
> > --
> >http://mail.python.org/mailman/listinfo/python-list

creating a short example to illustrate a point is always dangerous :)

<digression>
I chose the pumping station because many years ago I used to do plant
control programs in Forth. One engineer I worked with had described
the requirements in such terms as you give.
e.g keep the tank not too full or empty, but run the pumps at least 4
hours a day.
I considered writing a declarative rule based language to express
this. but on further conversation I found that the engineers already
had a semi formal procedural notation used for manual instructions
which it was very easy to adapt Forth to parse.

Forth's defining words allowing the creation of new language
constructs always made writing domain specific programs easy.

I mention this as, having been writing C++ for 15 years since those
days. Python is the first new language that I really feel comfortable
with and that carries that same feeling of expressiveness.

</digression>






From xahlee at gmail.com  Wed May  7 19:13:36 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Wed, 7 May 2008 16:13:36 -0700 (PDT)
Subject: The Importance of Terminology's Quality
Message-ID: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>

I'd like to introduce a blog post by Stephen Wolfram, on the design
process of Mathematica. In particular, he touches on the importance of
naming of functions.

? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
Wolfram
 http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/

The issue is fitting here today, in our discussion of ?closure?
terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
meaning space vs single-meaning space), ?tail recursion?, ?currying?,
?lambda?, that perennially crop up here and elsewhere in computer
language forums in wild misunderstanding and brouhaha.

The functions in Mathematica, are usually very well-name, in contrast
to most other computing languages. In particular, the naming in
Mathematica, as Stephen Wolfram implied in his blog above, takes the
perspective of naming by capturing the essense, or mathematical
essence, of the keyword in question. (as opposed to, naming it
according to convention, which often came from historical happenings)
When a thing is well-named from the perspective of what it actually
?mathematically? is, as opposed to historical developments, it avoids
vast amount of potential confusion.

Let me give a few example.

? ?lambda?, widely used as a keyword in functional languages, is named
just ?Function? in Mathematica. The ?lambda? happend to be called so
in the field of symbolic logic, is due to use of the greek letter
lambda ??? by happenstance. The word does not convey what it means.
While, the name ?Function?, stands for the mathematical concept of
?function? as is.

? Module, Block, in Mathematica is in lisp's various ?let*?. The
lisp's keywords ?let?, is based on the English word ?let?. That word
is one of the English word with multitudes of meanings. If you look up
its definition in a dictionary, you'll see that it means many
disparate things. One of them, as in ?let's go?, has the meaning of
?permit; to cause to; allow?. This meaning is rather vague from a
mathematical sense. Mathematica's choice of Module, Block, is based on
the idea that it builds a self-contained segment of code. (however,
the choice of Block as keyword here isn't perfect, since the word also
has meanings like ?obstruct; jam?)

? Functions that takes elements out of list are variously named First,
Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
?unshift?, in lisps and perl and other langs.

The above are some examples. The thing to note is that, Mathematica's
choices are often such that the word stands for the meaning themselves
in some logical and independent way as much as possible, without
having dependent on a particular computer science field's context or
history. One easy way to confirm this, is taking a keyword and ask a
wide audience, who doesn't know about the language or even unfamiliar
of computer programing, to guess what it means. The wide audience can
be made up of mathematicians, scientists, engineers, programers,
laymen. This general audience, are more likely to guess correctly what
Mathematica's keyword is meant in the language, than the the name used
in other computer languages who's naming choices goes by convention or
context.

(for example, Perl's naming heavily relies on unix culture (grep,
pipe, hash...), while functional lang's namings are typically heavily
based on the field of mathematical logic (e.g. lambda, currying,
closure, monad, ...). Lisp's cons, car, cdr, are based on computer
hardware (this particular naming, caused a major damage to the lisp
language to this day). (Other examples: pop, shift are based on
computer science jargon of ?stack?. Grep is from Global Regular
Expression Print, while Regular Expression is from theoretical
computer science of Automata... The name regex has done major hidden
damage to the computing industry, in the sense that if it have just
called it ?string patterns?, then a lot explanations, literatures,
confusions, would have been avoided.))

(Note: Keywords or functions in Mathematica are not necessarily always
best named. Nor are there always one absolute choice as best, as there
are many other considerations, such as the force of wide existing
convention, the context where the function are used, brevity,
limitations of English language, different scientific context (e.g.
math, physics, engineering), or even human preferences.)

----------------------------

Many of the issues regarding the importance and effects of
terminology's quality, i've wrote about since about 2000. Here are the
relevant essays:

? Jargons of Info Tech Industry
 http://xahlee.org/UnixResource_dir/writ/jargons.html

? The Jargon ?Lisp1? vs ?Lisp2?
 http://xahlee.org/emacs/lisp1_vs_lisp2.html

? The Term Curring In Computer Science
 http://xahlee.org/UnixResource_dir/writ/currying.html

? What Is Closure In A Programing Language
 http://xahlee.org/UnixResource_dir/writ/closure.html

? What are OOP's Jargons and Complexities
 http://xahlee.org/Periodic_dosage_dir/t2/oop.html

? Sun Microsystem's abuse of term ?API? and ?Interface?
 http://xahlee.org/java-a-day/interface.html

? Math Terminology and Naming of Things
 http://xahlee.org/cmaci/notation/math_namings.html

  Xah
  xah at xahlee.org
? http://xahlee.org/

?


From __peter__ at web.de  Sun May 25 06:38:11 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 25 May 2008 12:38:11 +0200
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
Message-ID: <g1bfih$b3i$01$1@news.t-online.com>

Ulrich Dorda wrote:

> I've got a probably embarrassing trivial problem with namespaces, but
> couldn't solve it myself nor find an answer in the net. Hopefully one of
> you guys can help me.
> 
> What I want to do:
> Use the interactive shell and e.g define the variable a there.
> Then load a module and access a from within.
> 
> e.g file "utest.py"
> 
> def doit():
> print 2*a
> 
> in the shell:
> 
> import utest
> a=3
> utest.doit()  <- I want this to print 2*a, but of course obtain: <type
> exceptions.NameError'>: global name 'a' is not defined
> 
> Any change I do to a in the shell should be seen from the doit() function,
> any variable assignment I do in the doit() function should be seen in the
> shell. I guess it's somehow a namespace sharing.
> 
> Actually the function doit() will contain an eval() function that should
> evaluate a (via a gui) dynamically inserted expression.
> 
> Any one got a clue? (a clue what I try to say and how to help?!)
> 
> Thanks a lot in advance!!

While the sane approach to this is

def doit(a):
    print 2 * a

here is an insane one:

import sys

def f(): pass
function = type(f)

def snatch_globals(f):
    def g(*args, **kw):
        return function(f.func_code, sys._getframe(1).f_globals)(*args,
**kw)
    return g

@snatch_globals
def doit():
    print 2 * a

Peter


From wuwei23 at gmail.com  Sat May 17 04:36:37 2008
From: wuwei23 at gmail.com (alex23)
Date: Sat, 17 May 2008 01:36:37 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>
Message-ID: <eafc98c5-2f09-4795-a607-140b20a0b2cc@c19g2000prf.googlegroups.com>

On May 17, 7:29 am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> What about *READING THAT FUCKING MANUAL* ?

I don't think he has the time.

> Now : it's not the first time - in a couple days - that you ask a
> question that you wouldn't have asked if you had taken a couple
> minutes doing the tutorial and/or reading the doc.

It's not just here, either. He's been posting similar low-level
questions to groups on lisp, ruby, haskell, javascript, prolog, scheme
and smalltalk. Either he's crowd-sourcing his learning, needs some
serious medication for his ADD, or is just taking the piss.

Over the past couple of months, the idiots have really taken over this
group.

- alex23


From paul at boddie.org.uk  Wed May  7 19:09:07 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 7 May 2008 16:09:07 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
	<6b6e0eec-a570-4a58-8c8b-72e1cf23d9d7@a1g2000hsb.googlegroups.com>
Message-ID: <621f79a4-3862-40ae-beb8-e6f11e3a2006@w7g2000hsa.googlegroups.com>

On 7 Mai, 19:57, Carl Banks <pavlovevide... at gmail.com> wrote:
>
> That IBM and other companies are involved with Linux is an example of
> companies that are willing to get involved with GPL; it says nothing
> about whether those companies would be more, less, or un- willing to
> also get involved with more permissive licenses.

Sure, but you have to wonder why IBM invested so heavily in Linux when
there were at least three different free and mature variants of BSD
"Unix" that certain parties regarded more favourably for commercial
usage at that time. It's possible to claim now that Linux is more
attractive than a number of permissively licensed solutions for
reasons of familiarity and community size, not licensing, but that may
not have been a compelling case back when IBM decided to invest in
Linux.

> IBM is also involved with Apache, which does have a permissive
> license.

I've seen other companies using Apache, too, but I've been far from
impressed by their enhancements (which have been proprietary, if I
recall correctly). One could argue that such companies see little
point in contributing their work to the community, perhaps fearing the
supposed advantage that their enhancements bring, yet simultaneously
fail to take advantage of the improvements the community can provide.

Paul


From vivainio at gmail.com  Mon May  5 14:26:17 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:26:17 GMT
Subject: ]ANN[ Vellum 0.16:  Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
Message-ID: <ve1szjy2.fsf@gmail.com>

"Zed A. Shaw" <zedshaw at zedshaw.com> writes:

> GPLv3?
>
> How do people feel about Vellum's GPLv3 status?  It actually doesn't
> impact anyone unless you embed Vellum into a project/product or you

Yeah, but it effectively prevents people from embedding it into their
apps that wish to remain BSD/MIT clean.

It's not likely that some evil corporation is going to hijack Vellum
source code as a basis of their next evil app (which is basically what
GPL is used to prevent) any time soon, so I don't really see a
particular reason for such a developer-oriented tool to be released
under GPL.

Basically, avoiding GPL maximizes the brainshare that a small-ish tool
is going to attract, and many (including myself, FWIW) view GPL as a
big turn-off when I consider spending some time to familiarize myself
with a tool, or recommending it to someone else.



From jamesd at echeque.com  Tue May 20 00:00:19 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 14:00:19 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<pan.2008.05.20.00.58.50.596857@reidster.net>
Message-ID: <1fi434dog4u92tk7na5qhvfapl70mg8d93@4ax.com>

> > 2.  It is not clear to me how a python web application scales.  Python
> > is inherently single threaded, so one will need lots of python
> > processes on lots of computers, with the database software handling
> > parallel accesses to the same or related data.  One could organize it
> > as one python program for each url, and one python process for each
> > http request, but that involves a lot of overhead starting up and
> > shutting down python processes.  Or one could organize it as one
> > python program for each url, but if one gets a lot of http requests
> > for one url, a small number of python processes will each sequentially
> > handle a large number of those requests.  What I am really asking is:
> > Are there python web frameworks that scale with hardware and how do
> > they handle scaling?

Reid Priedhorsky 
> This sounds like a good match for Apache with mod_python.

I would hope that it is, but the question that I would like to know is
how does mod_python handle the problem - how do python programs and
processes relate to web pages and http requests when one is using
mod_python, and what happens when one has quite a lot of web pages and
a very large number of http requests?
--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From larry.bates at websafe.com`  Fri May 16 11:21:11 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 10:21:11 -0500
Subject: Cookies and CookieJar
Message-ID: <kuCdnToWMK7yO7DVnZ2dnUVZ_q_inZ2d@comcast.com>

I'm struggling with a project using mechanize and cookies to screen scape a 
website.  The site requires a client created cookie for authentication.  Below 
is the code I'm attempting to use with the traceback I'm getting:



 >>> import Cookie
 >>> c=Cookie.SimpleCookie()
 >>> c["Manageopen"]="cards"
 >>> c['Manageopen']['expires'] = 0
 >>> c['Manageopen']['path'] = "/"
 >>> c['Manageopen']['domain'] = ".domain.com"
 >>> c['Manageopen']['secure'] = ""
 >>> c.output()
'Set-Cookie: Manageopen=cards; Domain=.domain.com; expires=Fri, 16-May-2008 
14:06:00 GMT; Path=/'
 >>> import cookielib
 >>> cj=cookielib.CookieJar()
 >>> cj.set_cookie(c)
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
   File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
     if cookie.domain not in c: c[cookie.domain] = {}
AttributeError: 'SimpleCookie' object has no attribute 'domain'
 >>>

I also tried:

 >>> cj.set_cookie(c["Manageopen"])
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
   File "C:\Python25\lib\cookielib.py", line 1617, in set_cookie
     if cookie.domain not in c: c[cookie.domain] = {}
AttributeError: 'Morsel' object has no attribute 'domain'


I've looked at everything I can find via Google and nothing seems to help.

Thanks in advance.

Regards,
Larry


From banibrata.dutta at gmail.com  Tue May  6 04:35:25 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Tue, 6 May 2008 14:05:25 +0530
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
Message-ID: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>

On 5/6/08, andrej.panjkov at climatechange.qld.gov.au
<andrej.panjkov at climatechange.qld.gov.au> wrote:
> At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
> other unixy OSes.
>
> We have python installed in a number of different places:
> /bin/python
> /usr/local/bin/python
> /usr/bin/python
> /opt/freeware/Python/Python-2.5.1/bin/python
> ~mataap/platform/python/python-2.5.1
>
> So I cannot assume a single location for python.  Nor for any other
> tool, really.  Bash for example.  It may indeed be in /usr/bin on many
> systems, on many others it is not.
>
> Note the version specific install points.  This allows us to switch
> over easily to different versions, and keep older versions in case
> they are needed.  We can test new versions before cutting over to them
> operationally. (This matters for tools that are still changing, like
> python or bash.)
>
> We use the very handy 'modules' package (not python modules, not
> fortran modules) to adjust our paths and environment variables as
> needed.
>
> Some of the install points are determined by policy, or historical
> constraints, or hardware limits, or file system layout.
>
> Now it is true that it is easy to edit a single script to change the
> hashbang line.  It is not easy to change several hundred scripts, on
> different machines.  It is easy to adjust the environment to point to
> the right python path, and have all your scripts pick it up
> automatically.

Looks reasonable thing to do...

>
> Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.

So why not put symlink to Python over there on all machines, if we can
put one (or env itself) there ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta


From amit.uttam at gmail.com  Mon May 19 16:58:28 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Mon, 19 May 2008 13:58:28 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
Message-ID: <60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>

On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> amit.ut... at gmail.com writes:
> > I've recently jumped big time into python and I'm working on a
> > software program for testing automation.
>
> Welcome, to both fields :-)
>

Thanks! I am having a great time learning and coding in python. It's
an amazing programming language.

> > I had a question about proper logging of output. What I would like
> > is:
>
> >  1. a function syslog (to log output to log file only)
> >  2. a function stdout (to log output to stdout only)
> >  3. a function sslog (to log output to both log and stdout)
>
> > Right now I am using StandOut module
>
> Have you investigated the 'logging' module in the Python standard
> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> to meet your listed requirements, without need of external
> dependencies.

Hmm..Yeah I didn't realize python had its own standard logging
facility. I took a look at it and it seems to do the job. However, the
output seems to be syslog style output. In the program I am writing,
the log file stores all the output of the commands being run (e.g. tcl
scripts, etc). Will this be possible using the built in python logging
module?

Thanks,
Amit


From castironpi at gmail.com  Wed May  7 00:36:00 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 21:36:00 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com> 
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com> 
	<6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>
Message-ID: <f828b142-e9f0-4629-ae83-52b3263a8cfd@24g2000hsh.googlegroups.com>

On May 6, 10:03?am, Aaron Watters <aaron.watt... at gmail.com> wrote:
> I'm having trouble following your discussion
> and I suspect you might be a friend of Mark V Cheney.
> But I will focus on this one point.
>
> On May 5, 11:14 pm, castiro... at gmail.com wrote:
>
> > If recursive generators are really useless (erect wall might not be),
>
> I would like to have recursive generators --
> for example to be able to traverse a tree
> and yield the value at every node. ?Right now
> to do this you need to build a chain of generators
> from each leaf to the root of the tree (or avoid
> recursion by managing your own stack of nodes).
> Every yield must "bubble up the tree".
>
> With stackless Python you create the equivalent
> of a "recursive generator" by using channels
> -- and you can do a lot of other cool stuff with
> channels too. ?The "yield" (which doesn't even
> require a special keyword ;) ) goes directly to
> the other endpoint of the channel, with no bubbling.
> It's too bad the Python that comes
> installed on Macs doesn't support channels :(.
>
> I know I didn't address your question or comments...
> ? -- Aaron Watters
>
> ====http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=ifdef+stackless

Just talking is fine.  (There's an intellectual moment of a group and
thread, which is fine and even fine to measure.)

You may be limiting your target audience to those who have engaged in
intellectual pursuits in computer science.  I may too.

My favorites to generate are "carfulls" of people, which compose
pretty broadly.  I can do roads, traffic, scheduling, etc., and I'd
like to install microrail.  Genetic searches for useful structures
show promise.  But my community has basic needs met: food and hot
running water.  Going more places does not improve quality of life,
nor does going more often.  Art is not very pretty, or for long, and
the art of motion has always been dance.  What generators run, how
often or when, in a good process?

I think feedback is important: if a computer can tell you what you
just said, say with keyboard metrics or recognition, you may get more
choice, and higher quality.

FTR, I am mostly staying off paper and on flash.  If you have a
computer, I'll probably try to set up a tron.py server-- bet it's a
screenful.


From aahz at pythoncraft.com  Wed May 21 14:41:00 2008
From: aahz at pythoncraft.com (Aahz)
Date: 21 May 2008 11:41:00 -0700
Subject: Help on thread pool
References: <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442@56g2000hsm.googlegroups.com>
Message-ID: <g11qbs$lak$1@panix3.panix.com>

In article <323a8e66-7cc0-4d1f-9d7a-fc70f0c0a442 at 56g2000hsm.googlegroups.com>,
Alex  <metallourlante at gmail.com> wrote:
>
>In order to understand the concept of threading pool in python I'm
>working on a simple single-site web crawler.

You can also compare your code against
http://www.pythoncraft.com/OSCON2001/ThreadPoolSpider.py  
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From exarkun at divmod.com  Tue May 13 16:16:13 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 16:16:13 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <da09c7d6-78ff-49fa-b1d5-d085256fe5e7@59g2000hsb.googlegroups.com>
Message-ID: <20080513201613.6859.1175062222.divmod.quotient.63033@ohm>

On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
>> We do not live in a pure world, Python isn't pure (practicality beats
>> purity), and by attempting to send some data each time a .push*()
>> method is called, there are measurable increases in transfer rates.
>
>Good point. I'd like to ask a question: if we'd have a default
>asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
>such problem?
>I've always found weird that asyncore has such an high default timeout
>value.
>Twisted, for example, uses a default of 0.01 ms for all its reactors.

I'm not sure this is right.  What timeout are we talking about?  Twisted
only wakes up when necessary.

Jean-Paul


From arnodel at googlemail.com  Mon May 26 03:58:28 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 26 May 2008 08:58:28 +0100
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
Message-ID: <m2lk1x5wez.fsf@googlemail.com>

pball.benetech at gmail.com writes:

> On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
>> > We can use any operation or function which
>> > takes and returns sets.
>>
>> I think the problem is significantly underspecified. It would be a more
>> interesting problem if there was a restriction to a few selected set
>> operations, e.g. union, intersection, difference, and combinations
>> thereof.
>
> Ok, that's quite right -- when I just tried to define "any function,"
> I found that all the solutions I came up with were combinations of the
> set operations defined for immutable sets. Let me improve the spec as
> the following:
>
> There may be arbitrarily many set elements (denoted by integers
> 1,2,3,...), arbitrarily many combinations of the elements composing
> the sets s_i (s0, s1, ...). We can use any of python's set operations
> or combination of those operations.

OK then, if you only allow union, intersection, difference, symmetric
difference then I think it would be easy to prove (I haven't done it!)
that if there is a solution to you problem, then the method below
yields a solution:

*** warning: all this is untested AND written in a rush ***

let S be the set of all your sets except s0 (i.e. s1, s2, s3, ...)


# X is the "domain", C is the set of complements in X of elements of S

X = reduce(set.union, S)
C = set(X - s for s in S)


# Find the "fibers" at each element x of s0.  A fiber at x is the set
# of all s in S or C that contain x

from collections import defaultdict
fibers = defaultdict(list)

for s in S | C:
    for x in s & s0:
        fibers[x].append(s)


# Find the "seeds" at each x in s0.  A seed at x is the set of all
# elements contained in all s in the fiber at x.

# Intutively, a seed at x is the smallest set containing x that can be
# built from S

seeds = [reduce(set.intersection, F) for F in fibers.itervalues()]


# Now we know if there is a solution:

sol = reduce(set.union, seeds)

if sol != s0:
    print "No solution"
else:
    print "Solution: union(intersection(fibers[x]) for x in s0)"


I think this solution will be found in O(m*n**2) time, where:

* n is the size of X (i.e. the total number of elements)
* m is the size of S (i.e. the total number of sets)

and assuming that set operations are linear.

-- 
Arnaud


From python at bc90021.net  Sun May 11 13:55:15 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 17:55:15 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
Message-ID: <7qGVj.32505$KJ1.18416@newsfe19.lga>

On Sun, 11 May 2008 18:36:25 +0100, Arnaud Delobelle wrote:

> bc90021 <python at bc90021.net> writes:
> 
>> Hi All,
>>
>> Thanks in advance for any and all help!
>>
>> I have this code:
>>
>> g = open(fileName, 'a')
>>
>> where fileName is defined before the line it's used in.  It works fine
>> when I use it outside a thread class.
>>
>> When I put the same line in a thread class, it no longer works, and I
>> get an error:
>>
>> IOError: [Errno 2] no such file u'fileName'
>>
>>
> It's telling you that you haven't got a file called 'fileName'. Posting
> the code that triggers this error would allow people to diagnose the
> error accurately rather than guessing.

f = open(otherFile).readlines()
for i in len(f):
	for c in range(0,24,1):
		if os.name == "posix":
			tempfileName = "\"proctemp/" + self.matrix[c][0] 
+ "_tmp_" + fileName + ".txt\""
   	if re.search(f[i], pattern):
		g = open(tempfileName, 'a')
		g.write(f[i])


This code works *perfectly* unless I put it in a class that inherits from 
threading.Thread.  In the thread class, everything works (I can see the 
"c" value, and I can print out each line in "f[i]", it's just that the g 
= open line doesn't work.





From bj_666 at gmx.net  Fri May 23 01:48:51 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 05:48:51 GMT
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
Message-ID: <69n463F33hfhfU2@mid.uni-berlin.de>

On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:

> Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> exception like this:
> 
> Traceback (most recent call last):
>   File "<pyshell#18>", line 1, in <module>
>     myDLL.myFUNCT()
>   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
>     func = self.__getitem__(name)
>   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
>     func = self._FuncPtr((name_or_ordinal, self))
> AttributeError: function 'myFUNCT' not found

Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
chance you compiled your C as C++ and name mangling kicked in?

Can you show a minimal C source for a DLL, how you compiled it, what you
did on the Python side to call it, and how it fails?

Ciao,
	Marc 'BlackJack' Rintsch


From wojtek.gminick.walczak at gmail.com  Mon May  5 08:10:59 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Mon, 5 May 2008 14:10:59 +0200
Subject: confused about self, why not a reserved word?
In-Reply-To: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <2c3c21060805050510x11ff4f68oc78540969a029478@mail.gmail.com>

2008/5/5, globalrev <skanemupp at yahoo.se>:
> class Foo(object):
>         def Hello(self):
>                 print "hi"
>
>  object is purple, ie some sort of reserved word.
>
>  why is self in black(ie a normal word) when it has special powers.
>  replacing it with sel for example will cause an error when calling
>  Hello.

Could you give an example of such an error?

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From __peter__ at web.de  Fri May 16 05:26:55 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 11:26:55 +0200
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org>
Message-ID: <g0jk0v$coa$01$1@news.t-online.com>

?? wrote:

>     I wonder why below does not work.
> 
> a = object()
> a.b = 1        # dynamic bind attribute failed...

The implementation of slots depends on that behaviour:

http://docs.python.org/ref/slots.html

> Does this strange behavior break the LSP (Liskov substitution principle)?

Can you expand on that?

Peter


From stefan_ml at behnel.de  Fri May 16 05:47:03 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 16 May 2008 11:47:03 +0200
Subject: ElementTree and DTDs
In-Reply-To: <17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>
References: <220b177d-1d2e-40b2-aed5-cc749d084bc8@a1g2000hsb.googlegroups.com>
	<17a5ff13-8750-4b26-9f5a-43148e3f69f4@l64g2000hse.googlegroups.com>
Message-ID: <482D5817.9030107@behnel.de>

J. Pablo Fern?ndez wrote:
> Is ElementTree supposed to load DTDs?

AFAIR, you have to provide entities by hand.


> Or is there another library that would handle DTDs correctly,
> performing entity replacements?

http://codespeak.net/lxml
http://codespeak.net/lxml/parsing.html#parser-options

Stefan


From kyosohma at gmail.com  Fri May 16 09:17:00 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:17:00 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<mailman.1204.1210901120.12834.python-list@python.org>
Message-ID: <7ca5661b-7e20-4328-8450-65b2c6fc5c7a@k13g2000hse.googlegroups.com>

On May 15, 8:24?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 15 May 2008 12:13:56 -0300, Mike Driscoll <kyoso... at gmail.com> ?
> escribi?:
>
> > I've had this niggling issue from time to time. I want to create a
> > shortcut on the user's desktop to a website that specifically loads
> > Firefox even if Firefox is not the default browser.
>
> > I usually use COM as it allows very specific settings of the shortcut,
> > such as the Working Directory and the Target Path. However, the
> > following will not work for some reason:
>
> Try this different approach, using the IShellLink interface:http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/pywin32/win32c...
>
> --
> Gabriel Genellina

Thanks Gabriel...it looks a little overwhelming, but I'll file it away
for future reference.

Mike


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 06:24:41 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 12:24:41 +0200
Subject: Newbie In Python
In-Reply-To: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
References: <316da0ad-403d-492c-81b1-4aa069da0caa@k10g2000prm.googlegroups.com>
Message-ID: <4832a6e3$0$28693$426a74cc@news.free.fr>

andrew.smith.cpp at gmail.com a ?crit :
> I have Heard About "Python" its a OOD Language. 

'OOD' => 'object oriented ???' ?

> i have to Learn it
> where from i should start it.

Err... What about reading the docs on python.org - possibly starting 
with the tutorial:
http://docs.python.org/tut/tut.html

You'll find other tutorial etc here:
http://www.python.org/doc/


> i have python compiler

Just for the record, "python" is also the name of a compiler for CMU 
Common Lisp (totally unrelated to the Python language), so make sure 
that what you have is the CPython language install.

HTH


From mensanator at aol.com  Thu May 22 12:56:41 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 22 May 2008 09:56:41 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
Message-ID: <ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>

On May 22, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Dave Parker <davepar... at flamingthunder.com> wrote:
> > ?But after getting input from children and teachers, etc, it started
> > ?feeling right.
>
> > ?For example, consider the two statements:
>
> > ? ? ? x = 8
> > ? ? ? x = 10
>
> > ?The reaction from most math teachers (and kids) was "one of those is
> > ?wrong because x can't equal 2 different things at the same time".
>
> This is a common feature in functional languages...
>
> Eg
>
> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> [async-threads:0] [kernel-poll:false]
>
> Eshell V5.6.2 ?(abort with ^G)
> 1> X = 8.
> 8
> 2> X = 10.
> ** exception error: no match of right hand side value 10
> 3>
>
> That error message is the erlang interpreter saying "Hey I know X is
> 8, and you've said it is 10 - that can't be right", which is pretty
> much what math teachers say too...

Are you saying that erlang treats 1> as an assignment, yet
treats 2> as a comparison?

That's inconsistent. No wonder nobody uses erlang.

Why isn't erlang smart, like Python, and avoid such confusion?

IDLE 1.2
>>> X = 2**3   # assignment
>>> X == 8     # comparison
True
>>> X == 10
False
>>>

>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick



From nicolas.dandrimont at gmail.com  Thu May  8 19:10:46 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Fri, 9 May 2008 01:10:46 +0200
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <20080508231046.GA21873@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-08 15:54:42 -0700]:

> Have a look at this:
> 
> >>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).
> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 

And why is this a problem ? It is the "standard" operator precedence 
that -123^0 is -(123^0), isn't it ?

> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 

That's what it does : 

>>> -123**0
-1
>>> (-123)**0
1

> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.

Again, the mathematical result is correct. -123^0 is -(123^0), not
(-123)^0.

Regards,
-- 
Nicolas Dandrimont

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From ivan.illarionov at gmail.com  Tue May 20 04:32:32 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:32:32 +0000 (UTC)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
Message-ID: <g0u2b0$1fec$2@news.mtu.ru>

On Mon, 19 May 2008 08:53:11 -0700, Henrique Dante de Almeida wrote:

> On May 19, 6:52?am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Henrique Dante de Almeida a ?crit :
>>
>> > On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
>> >> Hello.
>>
>> (snip)
>> >> However, it is usually said that Python is not a compiled but
>> >> interpreted programming language ?I mean, it is not like C, in that
>> >> sense.
>>
>> (snip)
>> > ?I guess that python is not a good language for that.
>> (snip)
>> > ?My opinion: choose compiled or byte compiled languages.
>>
>> Slightly OT (ie : not talking about computation-heavy alorgithm being
>> better implemented in C then wrapped in Python - this seems quite
>> obvious) but just a couple facts:
>>
>> 1/ being interpreted or compiled (for whatever definition of these
>> terms) is not a property of a language, but a property of an
>> implementation of a language.
>>
>> 2/ actually, all known Python implementations compile to byte-code.
> 
>  Yes, I was actually referring to statically typed JIT-compiled
> languages. Sorry about that, blame the beers that entered my digestive
> system that night. :-P

[beer.blame() for beer in beers]

if len(beers) > 2:
    news_reader.stop_working()

:-)


From yves at zioup.com  Wed May 14 20:23:26 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Thu, 15 May 2008 00:23:26 GMT
Subject: How to subclass file
Message-ID: <2oLWj.137678$rd2.90955@pd7urf3no>

I want to create a subclass of 'file' but need to open the file with os.open
(because I want to open it in exclusive mode), and need an additional method.

Because I need an additional method, I truly need a object of my sublass.
If I do something like

class myFile(file):

  def __new__(cls, filename):
    import os
    fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
 
    return os.fdoen(fd, 'w')

  def myMethod(self):
    do_something


then x = myFile('somefilename') is of type file, not myFile, and therefore
does not have myMethod as a valid method.

Now if I try:

class myFile(file):

  def __new__(cls, filename):
    import os
    fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)

    obj = file.__new__(cls)
 
    return obj

  def myMethod(self):
    do_something

Then it fails, because the 'file' constructor needs a filename. I can provide
the filename, but it will then try to re-open that file, and even if I did
manage to create an object file, how do I connect the file descriptor created
by os.open to my object ?


Thanks.


Yves.
http://www.SollerS.ca



From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:33:55 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:33:55 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <mailman.1338.1211191540.12834.python-list@python.org>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>	<48314dd0$0$32138$426a34cc@news.free.fr>
	<mailman.1338.1211191540.12834.python-list@python.org>
Message-ID: <48315792$0$27846$426a74cc@news.free.fr>

Tim Golden a ?crit :
> Bruno Desthuilliers wrote:
>> 2/ actually, all known Python implementations compile to byte-code.
> 
> In curiosity, did your "actually" mean, in the French sense, "at the 
> moment" or, in the English sense, "in contrast to something stated 
> earlier"? Or maybe both?

I mainly intented it to be understood in the English sense - but taking 
it the French way would be ok too.


From johnjsal at NOSPAMgmail.com  Sun May 18 18:20:22 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 18 May 2008 18:20:22 -0400
Subject: How do *you* use Python in non-GUI work?
Message-ID: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>

Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)

Thanks.


From sven.siegmund at gmail.com  Sun May 11 18:36:22 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:36:22 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <845f3e49-14ef-43dd-8cc9-806f1f50690c@59g2000hsb.googlegroups.com>

> I have a source code which IDLE 3.0a5 cannot parse, but Python 3.0a5
> can:

Oh I see the posts in this newsgroup do not yet support Unicode. Most
of the special characters in my source code have been messed up. But
anyway, those who know Czech can handle it. The error is replicable
even with the messed-up characters.

S.


From banibrata.dutta at gmail.com  Mon May 12 02:45:06 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 12:15:06 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <4827E6B9.3080509@shopzeus.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
Message-ID: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>

On 5/12/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>
> Banibrata Dutta ?rta:
>
>> Hi,
>>  Again a noob question.
>>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
>> correct to conclude that there is no RDBMS agnostic, single/uniform DB
>> access API for Python ?
>> Something in the lines of JDBC for Java, DBD for Perl etc. ?
>>  How is the RDBMS change handled for solutions which need to work with
>> different RDBMSs ??
>>
> http://www.python.org/dev/peps/pep-0249/
>


That appears to be only an API specification. Are there any implementations
of that ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From zapwireDASHgroups at yahoo.com  Tue May 27 16:48:33 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:48:33 -0700
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>
Message-ID: <Is__j.39066$dq6.8748@en-nntp-09.dc1.easynews.com>

"Paul Hankin" <paul.hankin at gmail.com> wrote in message 
news:0ea08237-c9f9-441b-a744-7410114b5ae9 at t54g2000hsg.googlegroups.com...
"Did you actually write self,args = args?"

(looks at source code)

$#@#%#$  Why, yes, yes I did!  Thanks for catching that...




From aal3beer at gmail.com  Tue May 27 01:47:56 2008
From: aal3beer at gmail.com (hotset)
Date: Mon, 26 May 2008 22:47:56 -0700 (PDT)
Subject: =?windows-1252?Q?ICDL_Exam_Cram=99_2_=2D_Syllabus_4=2E0?=
Message-ID: <7756fe80-ca16-4894-bbda-d6532a4d6bad@d45g2000hsc.googlegroups.com>

http://www.al3beer.com/vb/showthread.php?t=9179


From bignose+hates-spam at benfinney.id.au  Fri May  2 01:48:48 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 15:48:48 +1000
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
Message-ID: <871w4l1cjj.fsf@benfinney.id.au>

Jeroen Ruigrok van der Werven <asmodai at in-nomine.org> writes:

> -On [20080502 05:26], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
> >I've never clearly understood why people want to use "#!
> >/usr/bin/env python", which is prone to finding a different Python
> >from the one installed by the operating system. I'd be interested
> >to see what responses are in favour of it, and what the reasoning
> >is.
> 
> Simple, some systems are not as peculiar as a lot of Linux boxes
> which chug everything into /usr/bin, which is OS territory (as has
> been decreed long ago by hier(7)), but rather use /usr/local/bin
> (all BSD Unix and derivatives) or /opt or whatever convention a
> particular operating system has.

To my mind, the Python interpreter installed by a package as
distributed with the OS *is* OS territory and belongs in /usr/bin/.

> As such, your script with #!/usr/bin/python is as bad as an ash
> shell script with #!/bin/bash.

Clearly if the program is written to be interpreted by the Ash shell,
it should not declare Bash as the interpreter.

I don't see how declaring Python as the interpreter for a Python
program is supposed to be "as bad" as that.

-- 
 \     "Don't be afraid of missing opportunities. Behind every failure |
  `\      is an opportunity somebody wishes they had missed."  -- Jane |
_o__)                                          Wagner, via Lily Tomlin |
Ben Finney


From bj_666 at gmx.net  Fri May  2 07:19:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 11:19:55 GMT
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
Message-ID: <680bmrF2r409aU4@mid.uni-berlin.de>

On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:

> I have a comma delimited file that is separated by comma's, and then
> sometimes by ","
> 
> c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
> 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
> c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
> 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
> c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
> 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "

The items are always delimited by commas but some items themselves contain
a comma and therefore are enclosed in double quotes.  So it's not
inconsistent.

> How do I convert that line into a list?

Use the `csv` module in the standard library.

Ciao,
	Marc 'BlackJack' Rintsch


From davidj411 at gmail.com  Sat May 24 14:13:12 2008
From: davidj411 at gmail.com (David Jackson)
Date: Sat, 24 May 2008 14:13:12 -0400
Subject: csv iterator question
In-Reply-To: <48374E86.9040901@admailinc.com>
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
	<48374E86.9040901@admailinc.com>
Message-ID: <491b0d8f0805241113m25cbc7c6u8bc1fa4b56ed712a@mail.gmail.com>

Thanks, Ethan. that was a great solution. i just tested it.


On Fri, May 23, 2008 at 7:08 PM, Ethan Furman <efurman at admailinc.com> wrote:

> davidj411 wrote:
>
>  When you save an open file to a variable, you can re-use that variable
>> for membership checking.
>> it does not seem to be that way with the csv.reader function, even
>> when set to a variable name.
>>
>> what is the best way to store the open CSV file in memory or do i need
>> to open the file each time?
>>
>> example of open method on file object:
>> fhandle=open(filename).readelines()
>>
>>
> >>> fhandle = open('c:/temp/08-02024.csv').readlines()
> >>> type(fhandle)
> <type 'list'>
> >>> len(fhandle)
> 381
>
> fhandle is a list containing the contents of the file, not a file handle --
> that's why you can easily re-use it.
>
>  example of csv.reader method:
>> reader = csv.reader(open(csvfilename))
>>
>>
> Try this instead:
> >>>reader  = csv.reader(open('c:/temp/08-02024.csv'))
> >>> contents = [line for line in reader]
> >>> type(contents)
> <type 'list'>
> >>> len(contents)
> 381
>
> You still get a list that you can easily use, that has gone through the csv
> routines.
>
> Hope this helps.
> --
> Ethan
>
>
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From bj_666 at gmx.net  Sun May 18 05:31:54 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 18 May 2008 09:31:54 GMT
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
	<482FF39A.5010604@v.loewis.de>
Message-ID: <69abcaF30gaveU1@mid.uni-berlin.de>

On Sun, 18 May 2008 11:15:06 +0200, Martin v. L?wis wrote:

>> Full day later, I think it, to emphasize state, would prioritize
>> context.  The reason for the huge ramble was, believe it or not,
>> namespace conflict... as though any other states around here might
>> nose in.
> 
> I think the namespace conflict is rather in cities than in states.
> For example, there are several cities called "Berlin", but only
> one state (that I know of) is called "Mecklenburg-Vorpommern".
> In some cases, prefixing helps, e.g. you don't call it "York"
> when that already exists, but "New York".

The state or the city "New York"!?  And wasn't the city object bound to
the name "New Amsterdam" once?  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From parag_paul at hotmail.com  Wed May  7 10:08:12 2008
From: parag_paul at hotmail.com (parag_paul at hotmail.com)
Date: Wed, 7 May 2008 07:08:12 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
Message-ID: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>

hi All,
I have no idea why I need to learn a new scripting language,
nothing much to the sytnax,
I need to understand what could be the prupose of another scripting
language

Cna you please help me with this,
Is there a possibilty to work on bigger projects with Python


From pavlovevidence at gmail.com  Tue May 13 17:59:16 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 13 May 2008 14:59:16 -0700 (PDT)
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
Message-ID: <87f5fa41-d053-4b15-8b3c-66d83169cddd@27g2000hsf.googlegroups.com>

On May 13, 3:27 pm, globalrev <skanem... at yahoo.se> wrote:
> i cant figure outif python has lexical or general scope.
>
> it seems functions have lexical scope but with some restrictions and

Yes.  (You can't modify a local variable from an inner scope--this
will change in Python 3.0.)

> some non-function scopes are dynamic?

No: I presume you mean the class statement, which is the only thing
other than def that introduces a scope in Python, but it's neither
dynamic nor lexical.  In fact it's closed: you can only access
variables in a class scope from that scope, and not from enclosed
scopes (e.g., method defintions) at all.


Carl Banks


From jcd at unc.edu  Thu May  8 13:26:04 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Thu, 08 May 2008 13:26:04 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<200805080912.29438.onsen-neko@gmx.net>
	<1210244572.6529.5.camel@jcd-desktop>
	<200805081911.47081.onsen-neko@gmx.net>
	<1210267542.8621.16.camel@aalcdl07.lib.unc.edu>
Message-ID: <1210267564.8621.18.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 13:25 -0400, J. Cliff Dyer wrote:
> On Thu, 2008-05-08 at 19:11 +0200, Daniel Marcel Eichler wrote:
> > Am Donnerstag 08 Mai 2008 13:02:52 schrieb J. Clifford Dyer:
> > 
> > > > I didn't said that interfaces are a kind of duck-typing. In fact it
> > > > was the exact opposite.
> > > >
> > > > > Sometimes you need that kind of rigor, and you can get it as
> > > > > easily as
> > > >
> > > > And sometimes you need more. So what?
> > >
> > > More rigor than Zope's interfaces offer?  
> > 
> > Did i say that? I only explained why interfaces are not 'simple method 
> > stubs'.
> > 
> 
> Um.  Yes.  I said "sometimes you need that kind of rigor," and proceeded
> to explain how zope interfaces offer it. (which you snipped from your
> quotation), and you said "sometimes you need more."  If you were
> actually responding to what I said, then "sometimes you need more" must
> mean more than zope interfaces.  
> 
> > > That's new information to 
> > > me. Perhaps you should stop being argumentative for a moment, and
> > > explain exactly what it is you're looking for and why Zope interfaces
> > > don't fit the bill.
> > 
> > Perhaps you should read more accurate. It's not my thread and i'm not 
> > looking for anything here.
> > 
> 
> Then what were you trying to say?
> 
-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From m13799684969 at 126.com  Sun May 25 16:39:26 2008
From: m13799684969 at 126.com (m13799684969 at 126.com)
Date: Sun, 25 May 2008 13:39:26 -0700 (PDT)
Subject: Discount, EDhardy, 10Deep, Bape, COOGI, GGG, Rich Yung, Designers 
	Hoodies, etc
Message-ID: <374b0c6c-d39d-4d10-893d-80801f6b7228@j1g2000prb.googlegroups.com>

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From jr9445 at ATT.COM  Fri May  9 10:02:59 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Fri, 9 May 2008 09:02:59 -0500
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908CA4E1B@brexc51p>

> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of grbgooglefan
> Sent: Friday, May 09, 2008 9:41 AM
> To: python-list at python.org
> Subject: How to modify meaning of builtin function "not" to "!"?
> 
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1
> 
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?


Serious question:  Why would you want to?  'not' is easier to read (and type) than '!'.  Mentally, when you  see '!' you think 'not'.  It's also harder to overlook 'not', especially when compared to '!contains()'.  Finally, I imagine that Spanish speaking coders suffer enormous mental anguish when they see a right-side up '!' at the beginning of a sentence.

if ( ! contains(s1,s2) ):
     return 1

if ( !contains(s1,s2) ):
     return 1

if ( not contains(s1,s2) ):
     return 1

if ( ?contains(s1,s2)):
     return 1




*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA625




From duncan.booth at invalid.invalid  Thu May 29 11:33:26 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 May 2008 15:33:26 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
Message-ID: <Xns9AADA759AF2ABduncanbooth@127.0.0.1>

"Dan Upton" <upton at virginia.edu> wrote:

> On Thu, May 29, 2008 at 3:36 AM, Duncan Booth
><duncan.booth at invalid.invalid> wrote:
>> Dave Parker <daveparker at flamingthunder.com> wrote:
>>
>>> Catch doesn't return just error types or numbers, it can return any
>>> object returned by the statements that are being caught; catch
>>> doesn't care what type they are.  For example:
>>>
>>>   Writeline catch(set x to "hello world".).
>>>
>>> will write "hello world".
>>
>> I really don't get this. Surely the point about an error being thrown
>> to a catch statement is that the error path is separate from the
>> normal execution path? What you are doing here is ensuring that
>> unexpected errors have no chance at all of propagating up to the top
>> level: they are invariably going to get caught by some other handler
>> that was installed just because someone was too lazy to write a set
>> statement followed by a writeline.
> 
> It also looks like an overloading of catch, semantically similar to
> the C: 
> 
> int retcode;
> if( retcode = doSomethingThatReturns0or1() ) printf("Hello world");
> 
> Again, I don't think you want to start overloading your
> exception-handling mechanism.  If you want a set expression to be
> equal to the l-value at the end, that's fine, but there's no reason
> that catch should evaluate to an object or an integral- or real-valued
> exception in error cases, or of the last statement of the block if
> there's no error.  (Evaluating a block to be equal to its last
> statement is okay, I guess; I know at least that there's a call in
> Scheme that lets you do a more imperative programming style in the
> functional language--whether that's a good thing is probably a holy
> war.)  I just think if you're shooting for an easily understandable
> language, overloading error handling requires more thought on the
> programmer's part, not less, because they have to reason about all
> outcomes.
> 
I like BCPL's way of handling block expressions: VALOF is followed by a 
block of statements and within that block RESULTIS gives the result. 
This lets you exit the block early (just like a return statement does), 
but without returning from the current procedure (unless of course the 
entire body of the procedure is a VALOF block). Naturally the result has 
to be explicitly specified (otherwise the value is undefined).

Maybe FT should do something similar:

   Writeline value of (set x to "hello world". Result is x.).

and catch can then stick to catching errors.

-- 
Duncan Booth http://kupuguy.blogspot.com


From johnjsal at NOSPAMgmail.com  Wed May 14 22:52:08 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:52:08 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
	<c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>
Message-ID: <20080514225208.3f02fd70.johnjsal@NOSPAMgmail.com>

On Tue, 13 May 2008 06:25:27 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> > I'm pretty generally interested, but where can print layout take you?
> 
> Not far, especially with books disappearing.  Our library says that
> these days, only 25% of their checkouts are books; the other 75% are
> DVDs, CDs, etc.

Sorry, but I must point out a logical flaw in this statement. Assuming your stats are even true, just because books are now only 25% of checkouts rather than, for example, 80%, doesn't necessarily imply that any less books are being checked out (i.e. "disappearing"). It can just as easily mean that *more* of the other things are being checked out while books remain the same.

Example:

Total number of items checked out:    100
Total number of books checked out:     80
Percentage of books checked out:       80%

Total number of items checked out:    320
Total number of books checked out:     80       # same as above
Percentage of books checked out:       25%


From skanemupp at yahoo.se  Sun May  4 16:59:08 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sun, 4 May 2008 13:59:08 -0700 (PDT)
Subject: pygame.mixer.load not working
Message-ID: <4c6d81b2-c2a7-4934-946e-826bec035bb7@w74g2000hsh.googlegroups.com>

import pygame

pygame.mixer.music.load(example1.mp3)
pygame.mixer.music.play(loops=1, start=0.0)


Traceback (most recent call last):
  File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 3, in
<module>
    pygame.mixer.music.load(example1.mp3)
NameError: name 'example1' is not defined

example1 is in the same directory as the script


From paddy3118 at googlemail.com  Mon May 12 11:15:49 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 12 May 2008 08:15:49 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<lI6dnUFf8M6yxbXVnZ2dnUVZ_gKdnZ2d@posted.visi>
Message-ID: <df34b9a3-bbb0-4655-ab48-c367613e77fa@2g2000hsn.googlegroups.com>

On May 12, 3:46 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-12, Ben Finney <bignose+hates-s... at benfinney.id.au> wrote:
>
> > Paddy <paddy3... at googlemail.com> writes:
>
> >> I've used Fortran and C and so would tend to use either i,j,k as the
> >> unused loop variable above, or, for clarity, call it something
> >> descriptive like loop_count, if the loop body would be clearer.
>
> > The problem with all of these names is that they also have long
> > precedent as names of values that *will* be used inside the loop.
>
> I guess people who standardize on loop_count never nest loops. :)
>
> > Because of the precedent of those names, choosing one of those
> > names doesn't make it clear to the reader that the value is
> > never used; they have no indication from you of that until
> > they look over the code a few times. It's implicit rather than
> > explicit.
>
> And when somebody adds a nested loop things fall apart.
I don't have an example to hand. A lot of casses of repeat_X_times
inside a loop of repeat_Y_times would naturally be written as
repeat_Y*X_times.
Oh, wait a bit,
<oversimplified_example_alert>
for i in range(3):
  print "Stay!"
  for j in range(2):
    print "Come over."
</oversimplified_example_alert>

Which could become:

for outer_stay_repetions in range(3):
  print "Stay!"
  for inner_come_over_repetions in range(2):
    print "Come over."

But the second is daft. Nested repeats don't neccessarily pose a
problem to choosing meaningful names for repeat counters that are not
going to be referenced in the loop body, and most times i,j,k are fine
for used and un-used loop indices I find.

- Paddy
(Or were you just having a laugh ;-)


From marco at sferacarta.com  Thu May  8 09:59:21 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 15:59:21 +0200
Subject: "prove"
In-Reply-To: <mailman.770.1210254618.12834.python-list@python.org>
References: <mailman.770.1210254618.12834.python-list@python.org>
Message-ID: <0HDUj.36466$o06.26411@tornado.fastwebnet.it>

Lucas Prado Melo wrote:

> How could I "prove" to someone that python accepts this syntax using
> the documentation (I couldn't find it anywhere):
> classname.functionname(objectname)

TUtorial 9.3.4, method objects

What exactly happens when a method is called? You may have noticed that 
x.f() was called without an argument above, even though the function 
definition for f specified an argument. What happened to the argument? 
Surely Python raises an exception when a function that requires an 
argument is called without any -- even if the argument isn't actually 
used...

Actually, you may have guessed the answer: the special thing about 
methods is that the object is passed as the first argument of the 
function. In our example, the call x.f() is exactly equivalent to 
MyClass.f(x). In general, calling a method with a list of n arguments is 
equivalent to calling the corresponding function with an argument list 
that is created by inserting the method's object before the first argument.


From skunkwerk at gmail.com  Mon May 12 15:33:48 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Mon, 12 May 2008 12:33:48 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<mailman.958.1210565450.12834.python-list@python.org>
Message-ID: <6f94632a-7e39-4174-aaee-74750bbdea15@a9g2000prl.googlegroups.com>

On May 11, 9:10 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 11 May 2008 13:16:25 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>
> > the only issue i have now is that it takes a long time for 100 threads
> > to initialize that connection (>5 minutes) - and as i'm doing this on
> > a webserver any time i update the code i have to restart all those
> > threads, which i'm doing right now in a for loop.  is there any way I
> > can keep the thread stuff separate from the rest of the code for this
> > file, yet allow access?
>
> Like using a separate thread to create the other 100?
>
> --
> Gabriel Genellina

thanks Gabriel,
   i think that could do it - let me try it out.  don't know why i
didn't think of it earlier.


From dullrich at sprynet.com  Tue May 20 07:12:01 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 20 May 2008 06:12:01 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
	<20080519144803.14d3569a@hyperspace>
Message-ID: <2la534p1h4g7lke3lq3tji06q6cm32v7b0@4ax.com>

On Mon, 19 May 2008 14:48:03 +0200, pataphor <pataphor at gmail.com>
wrote:

>On Mon, 19 May 2008 06:29:18 -0500
>David C. Ullrich <dullrich at sprynet.com> wrote:
>
>> Maybe you could be more specific? Various "positions" I've
>> taken in all this may well be untenable, but I can't think
>> of any that have anything to do with whether the data should
>> be a single list instead of a list of lists.
>
>What's 'untenable' (hey, I tried to get away with a smiley, remember)

Perhaps I should say that I was in no mood for smileys yesterday
morning: I hadn't eaten in 24 hours, hadn't had any water in
12 hours, and was anticipating an unpleasane instance of
what my doctor likes to call a "procedure" coming up in
a few hours. (Yes, everything went fine, thanks for asking -
today all is sweetness and light again.)

>is that a matrix is a list of rows. Suppose you do the transpose trick
>with the zip(*M) routine, now it's a list of columns. Both views are
>equal, there is no getting around the fact that you're holding an
>unnatural predisposition towards seeing the matrix as a list of rows,
>which it is most definitely not ...

Well, ok. Like I said, I never _took_ the position that it _should_
be a list of lists, I just said I didn't see the advantage to using
a single list.

Yes, the asummetry in my setup might be regarded as an 
aesthetic flaw. But that doesn't mean it doesn't work right,
and in any case _I_ regard it as a _feature_: rows and
columns look the same to the user even though they're
very different under the hood.

Although they're going to look the same, in the applications
I have in mind I expect that row operations will be more
frequent than column operations, so if we _were_ going
to worry about optimizing things optimizing row access 
might be reasonable.

>I was holding the brakes for this argument because I realize it's
>intuitive and also because Gabriel seems to want a list stay a list if
>he assigns something a list. But that's untenable too. Suppose you
>assign a column to a list? The list is torn to shreds and placed over
>multiple rows.

His desire here makes a lot more sense to me than it
seemed to at first, when he pointed out the problems
with "arow = m.row[0] = []". But this is a good point;
if we have rows _and_ columns then it seems like
he really can't have it his way.

Today's little joke: Long ago I would have solved
this by storing the data as a list of rows and _also_
a list of columns, updating each one any time the
other changed. Just goes to show you things
could always be worse...

>> (The only way I can parse this to make it relevant is to
>> assume that the position you're referring to is that a
>> list of lists is better than a single list. If so: First, I
>> haven't said that it was. Second, saying "B is untenable"
>> is not much of an answer when someone asks why you
>> say A is better than B.)
>
>Yes, it was not much of an answer but I was afraid of ending up in
>this quagmire. I now see that it is unavoidable anyway if I want to
>explain myself. Why couldn't you just see it the same way as me and
>leave it at that without waking up all the creatures of hell :-)

Sorry.

>> >And to address an 
>> >item in a matrix costs two lookups, row and column, while an array
>> >needs only one. 
>> 
>> The phrase "premature optimization" springs to mind.
>
>Well, I really liked your  slicing idea ...
>
>> This is _Python_ we're talking about. Supposing you're right that
>> doing two lookups _in Python_ is faster than doing one lookup
>> plus the calculuation col + row*width _in Python_, it can't
>> make enough difference to matter. In the sort of application I
>> have in mind things already happen "instantaneously".
>
>The computation is almost certainly faster. Lookups are expensive.

I know one thing about Python: I don't know exactly how it works,
and hence it's very difficult to be certain about such things without
actually testing them. Which is not to say you're not right.

>However I concede the point because we're not supposed to worry about
>such stuff. But it *is* a simpler format.

No wait, I know _two_ things about Python: (i) [repeat 
above] (ii) we're supposed to worry about such things 
_after_ determining that this particular such thing is 
actually the bottleneck. It seems incredibly unlikely 
that this detail is going to have any significance at
all in the final product.

>> The point is not to improve on NumPy. Trying to improve on
>> NumPy in pure Python code would be silly - if I wanted
>> optimized large matrices I'd _use_ NumPy. The point is just
>> to give a simple "intuitive" way to manipulate rows and
>> columns in small matrices. 
>
>Yes, me too. This is all about intuition.
>
>> So I'm not looking ahead to the future, things are not
>> scalable? The thing is not _supposed_ to scale up to
>> large matricies. If a person were dealing with large
>> matricies then almost all of it would need to be
>> rewritten (and if a person were dealing with really
>> large matrices then trying to do the thing in pure
>> Python would be silly in the first place, and insisting
>> on being able to write things like "m.row[0] =
>> m.row[1] + m.row[2]" could very well be a totally
>> wrong approach to begin with - I'd figure out the
>> operations I expected to need to do and write functions
>> to do them.)
>
>The reason why I am interested in this is that since I was writing
>sudoku algorithms some time ago I have been looking for ways to interact
>with data according to different views. I want the data to update even
>when I have made changes to them according to another view. In my case
>things are even more complex than they are with matrices because I
>tend to view sudoku as subcases of binary cubes. Imagine a 3d 9*9*9
>chessboard and try to place 81 non-threatening rooks in it. This is not
>quite a solution to a sudoku but every sudoku is also a solution to this
>problem. 
>
>One of the solution strategies I thought of was forgetting about the 3d
>binary cube's content at all, and just update row, column and file
>totals (I start with a 'filled' cube and wipe away fields that are
>covered by the 'rooks') to drive the optimization. Somehow this seems
>possible even though I do not use the cube itself anymore. It just
>exists as a figment of my imagination but still it defines the context.
>
>I hope you understand how this was driving me crazy and why I would be
>more than happy to return to a safe and sound, actually 'existing' cube,
>if only there was a way to access rows, columns and files (for example
>sum their elements) as shared data. In the end I realized that
>everything I was doing was an abstraction anyway and if that is the
>case why not use the simplest possible representation for the data and
>let any matrices, rows, columns, files, cubes and so on exist somewhere
>higher up in the levels of abstraction of the code.

Yes, that's interesting and explains why you found the current
discussion interesting.

>> Really. In one of the intended applications the matrix
>> entries are going to be home-made Rationals. Just
>> adding two of those guys takes a long time. It's
>> still more than fast enough for the intended application,
>> but [oh, never mind.
>
>Too late :-)
>
>> Sorry about the argumentative tone - I _would_ like
>> to know which "untenable position" you're referring to...
>
>No, it's no problem. Thanks again for bringing this up. Once I overcame
>my initial resistance to bringing up all this old (for me) issues I was
>more than happy to share intuitions. I hope this somehow results in a
>shared data type. Even just a matrix_with_a_view would be very nice.

Expressing interest is a big mistake...

My current Matrix is broken (thanks again, Gabriel).
And no, come to think of it, as he points out there's
really no reason descriptots should be involved.

Sometime soon a thread will appear titled something
like "indexed attributes" with a stripped-down but
functional example of what I have in mind for Matrix
(including enough complication to illustrate why
the way I'm doing seems to _me_ to be simpler
than alternatives that have been suggested).

>P.

David C. Ullrich


From wizzardx at gmail.com  Tue May  6 10:40:36 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 16:40:36 +0200
Subject: How do you debug memory usage?
In-Reply-To: <3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
References: <18c1e6480805060627y32aecc65wf9b4874c7f37590@mail.gmail.com>
	<3de8e1f70805060721n64944a6ep3592a4e2b7f63b2e@mail.gmail.com>
Message-ID: <18c1e6480805060740w13a4a04dl36c5e09aff0cf047@mail.gmail.com>

On Tue, May 6, 2008 at 4:21 PM, Banibrata Dutta
<banibrata.dutta at gmail.com> wrote:
> Many not be the most intuitive and elegant solution (I'm just a Python
> newbie), but if your Python code is constrained to the usage of Python 2.2
> language features, you could use Jython, and then (I'm hoping, since I've
> not tried this myself), use the Java Memory usage profiling/debugging tools.
>

Thanks for your post. I didn't think of Googling for "python memory
profiling". That search returns a lot of results.

I'll check a few of those results and post to the list if I find something good.

David.


From kamhung.soh at gmail.com  Fri May  2 17:13:46 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 03 May 2008 07:13:46 +1000
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <op.uajo880yev04yd@hungvista>

On Fri, 02 May 2008 23:47:11 +1000, Jetus <stevegill7 at gmail.com> wrote:

> On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
>> > I have a comma delimited file that is separated by comma's, and then
>> > sometimes by ","
>>
>> > c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
>> > 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
>> > c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
>> > 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
>> > c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
>> > 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>>
>> The items are always delimited by commas but some items themselves  
>> contain
>> a comma and therefore are enclosed in double quotes.  So it's not
>> inconsistent.
>>
>> > How do I convert that line into a list?
>>
>> Use the `csv` module in the standard library.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
>
> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

The reader in the csv package automatically handles double-quoted fields.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From rileyrgdev at gmail.com  Wed May 21 07:29:11 2008
From: rileyrgdev at gmail.com (Richard G Riley)
Date: Wed, 21 May 2008 13:29:11 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
Message-ID: <g11128$n1n$2@registered.motzarella.org>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:

> Gabriel Genellina a ?crit :
>> En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch
>> <deets at nospam.web.de> escribi?:
>>> Agustin Villena schrieb:
>>
>>>> is there anyway to show the class of a method in an exception's
>>>> traceback?
>>>>
>>>> I want to improve the line File "G:\dev\exceptions\sample.py",
>>>> line 3, in foo
>>>>
>>>> to File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>>>
>>>> Is this improvement feasible
>>> It should be. You can get a dictionary of the locals of an
>>> exception stack frame, of which you could extract the
>>> self-parameter's class.
>>
>> That by itself is not enough, the method could be inherited; one
>> should walk the base classes in the MRO to find the right one. And
>> deal with classmethods and staticmethods. And decorators that don't
>> preserve meta information... 
>
> And monkeypatches.
>
>> Hmmm, I think it isn't so trivial as it
>> seems.
>
> And not that useful - why would one care about the function being
> defined in class X or Y when one have the exact file and line ?

Very obvious I would think. One can develop ones own interactive class
browser and code navigator. One can not bring up class help from "line 3
in x.py" but one can from "classname : MyClass at line 2 in z.py". With
the class name I can navigate directly to all sorts of class related
information without the need to delve into a physical usage of it e.g
program.py at line 3.




From banibrata.dutta at gmail.com  Mon May 12 01:43:45 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Mon, 12 May 2008 11:13:45 +0530
Subject: Is there no single/uniform RDBMS access API module for Python ?
Message-ID: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>

Hi,

Again a noob question.

Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
correct to conclude that there is no RDBMS agnostic, single/uniform DB
access API for Python ?
Something in the lines of JDBC for Java, DBD for Perl etc. ?

How is the RDBMS change handled for solutions which need to work with
different RDBMSs ??

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From hdante at gmail.com  Sun May 11 19:20:00 2008
From: hdante at gmail.com (hdante)
Date: Sun, 11 May 2008 16:20:00 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <7c9edad0-abf6-4818-aad3-63259774d533@z72g2000hsb.googlegroups.com>

On May 11, 7:27?pm, Sven Siegmund <sven.siegm... at gmail.com> wrote:
> #!/usr/bin/python

 Notice that this line is probably not what you want, unless you
overwrote the default python 2 installation. The line should be:

 #!/usr/bin/env python3.0

 (this is irrelevant to the bug, however)

> IDLE complains about "invalid character in identifier" and highlights
> "zdroj" red in the first line (sic!).

 It worked here (Python 3.0a5 (r30a5:62856, May 11 2008, 19:52:04)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2). I started IDLE 3.0a5,
clicked the open menu, loaded the file, then run->run module. I've
copied and pasted your code and created the "slovn?k.txt" file. I'm
using tk 8.4.16.

 Would you mind reinstalling and notice any warning message during
compilation ?


From notnorwegian at yahoo.se  Mon May 19 23:36:45 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 19 May 2008 20:36:45 -0700 (PDT)
Subject: test mult vars to same value, how to shorten expr?
Message-ID: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>

 if i want o test:
if a == 5 and b ==5 and c==5 ... z==5

is there some synctactic suagr for this?

rather than maiking one of my own i mean, something built-in like:
if a,b,c... z == 5:


From skanemupp at yahoo.se  Thu May  1 11:55:53 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 1 May 2008 08:55:53 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
Message-ID: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>

im doing this :
http://www.learningpython.com/2006/03/12/creating-a-game-in-python-using-pygame-part-one/

and when closing the program the window stays up and doesnt respond. i
tried adding this:
http://www.pygame.org/wiki/FrequentlyAskedQuestions

bu it doesnt work, or maybe im doing it wrong.

heres the code without the added tutorial exit:


import os, sys
import pygame
from pygame.locals import *

if not pygame.font: print 'Warning, fonts disabled'
if not pygame.mixer: print 'Warning, sound disabled'

class PyManMain:
    """The Main PyMan Class - This class handles the main
    initialization and creating of the Game."""

    def __init__(self, width=640,height=480):
        """Initialize"""
        """Initialize PyGame"""
        pygame.init()
        """Set the window Size"""
        self.width = width
        self.height = height
        """Create the Screen"""
        self.screen = pygame.display.set_mode((self.width
                                               , self.height))


    def MainLoop(self):
        """This is the Main Loop of the Game"""
        while 1:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()


class Snake(pygame.sprite.Sprite):
    """This is our snake that will move around the screen"""

    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image, self.rect = load_image('snake.png',-1)
        self.pellets = 0

if __name__ == "__main__":
    MainWindow = PyManMain()
    MainWindow.MainLoop()



From yves at zioup.com  Fri May  2 00:36:06 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 04:36:06 GMT
Subject: no cleanup on TERM signal
Message-ID: <WSwSj.236857$pM4.38686@pd7urf1no>

I did a few tests with this script:

class byebye:

   def __del__(self):
     print 'Bye, bye...'


x = byebye()


x.del() gets executed if:
-I del x, then run gc.collect()
-simply exit the script
-get the script to abort on an exception

But if I kill it with the default signal TERM, the script dies, but I don't 
get the message, so I am assuming that python isn't taking the time to 
cleanup, even though that is (was) what TERM was intended for.

Has this been discussed before ? Is worth a suggestion (PEP) ?


-- 
Yves.
http://www.SollerS.ca


From fetchinson at googlemail.com  Mon May 19 14:08:42 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 19 May 2008 11:08:42 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <4831516b$0$24599$426a74cc@news.free.fr>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<4831516b$0$24599$426a74cc@news.free.fr>
Message-ID: <fbe2e2100805191108y9fb342eh5307959620c032bc@mail.gmail.com>

>
>  Hey all. Just thought I'd ask a general question for my own interest.
>> Every time I think of something I might do in Python, it usually
>> involves creating a GUI interface, so I was wondering what kind of
>> work you all do with Python that does *not* involve any GUI work.
>> This could be any little scripts you write for your own benefit, or
>> what you do at work, if you feel like talking about that! :)
>>
>
> web apps, command line utilities, and of course libraries.


Wow, really? I would have never guessed that anyone is doing command line
utilities and "libraries" as examples of projects that don't need a GUI.

Just kidding :)

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown
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From gnewsg at gmail.com  Mon May 26 13:30:10 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Mon, 26 May 2008 10:30:10 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
Message-ID: <acf63ade-4704-47a4-8cc1-8139b7c8e38c@f36g2000hsa.googlegroups.com>

On 25 Mag, 17:40, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a small wxPython application. Today I was trying to add some
> RPC capability to it, so I implemented an instance of
> SimpleXMLRPCServer that runs in a separate thread when invoked and
> answers requests.
>
> All went fine until I realized that I have to sometimes stop the
> server - which is where I ran into a problem. Python threads can not
> be killed after they've been started. They can be kindly requested to
> end, but it's up to the thread itself to decide when it wants to
> finish. At least this is my understanding. It probably makes sense,
> because threads can hold resources which can't just be dropped
> suddenly, and have to be cleaned in a proper manner. (Does this sound
> like the truth ?)
>
> Anyway, this creates a problem because SimpleXMLRPCServer likes to
> block and never return. I dug deeper and found out that all offspring
> of SocketServer can only handle requests in a blocking manner. Even if
> you call handle_request( ) and not serve_forever(), it will block
> until a request is received and handled. This means that a
> SocketServer object running in a thread blocks the thread, and this
> thread can not be stopped.
>
> Is there any graceful solution to this problem ?
>
> I suppose I can use sockets in non-blocking mode, or use select(), but
> this will mean I will have to implement my server with raw sockets and
> not a handy helper like SocketServer. For the XML-RPC server I want
> this is a headache, as I will probably have to implement my own XML-
> RPC server based on raw non-blocking sockets.
>
> Thanks in advance for any ideas and suggestions
> Eli

A "shutdown" method has been added to SocketServer.
Since it will be available in Python 2.6 and 3.0 you could look at the
patch and include a modified version of SocketServer into your package
and use it:
http://bugs.python.org/issue1193577


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From arnlen at mac.com  Thu May  1 01:38:29 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 07:38:29 +0200
Subject: PIL and IPTC
References: <mailman.386.1209575399.12834.python-list@python.org>
Message-ID: <0001HW.C43F23F5007F49F2B01AD9AF@news.individual.de>

Thanks, that is what I needed to get started.



From gagsl-py2 at yahoo.com.ar  Tue May  6 01:18:16 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 02:18:16 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<96087833-b427-4615-9188-c756394af15c@f24g2000prh.googlegroups.com>
Message-ID: <op.uapvoqssx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 05:08:15 -0300, Raymond Hettinger <python at rcn.com>  
escribi?:

> On May 3, 9:50?am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> I did the following calculation: ?Generated a list of a million random
>> numbers between 0 and 1, constructed a new list by subtracting the mean
>> value from each number, and then calculated the mean again.
>>
>> The result should be 0, but of course it will differ from 0 slightly
>> because of rounding errors.
>
> See:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/393090

Awesome!

> See:
> http://svn.python.org/view/sandbox/trunk/statistics/statistics.py?rev=40981&view=markup

Wonderful!

-- 
Gabriel Genellina



From notbob at nothome.com  Sat May 10 14:18:45 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 18:18:45 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com>
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com>
Message-ID: <9GlVj.168$PE5.102@fe087.usenetserver.com>

On 2008-05-10, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:

> Shebang is certainly broken, possible causes:
> 1. Wrong line endings (should be \n)

Nope.  Not it.

> 2. Whitespace before the shebang

BINGO!  ....we have a winner.  ;)

I thought for sure that was not correct.  No white space before the
sheba....  Wait a minute!  Howzabout a blank line above the shebang?  D0H!!

These are the minute details that bedevil the poor noob.  I've read dozens
of tutorials on different prog langs and have never read a single thing on
white space or blank lines preceding a shebang.  Till now.  I always get
frustrated and give up on learning programming, not really caring much for
coding, anyway.  But, dammit, I'm gonna stick with it this time.  I'll learn
python if it kills me!  ....that is, if you folks can stand all my dumb
questinons.  ;)

Thank you, Ivan, and other repondents.  

nb  ....back to while loops



From beema.shafreen at gmail.com  Sat May 17 10:47:55 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Sat, 17 May 2008 20:17:55 +0530
Subject: comparison of files using set function
Message-ID: <aa405c1f0805170747y7fd128dwbdf9dd91404c58e4@mail.gmail.com>

I have files with two column, column 1 is with id and column 2 is with
data(sequence)
My goal is to create a table in such a way, the column one of the table
should have all the id from the files and next column will be have the
respective seq of the file1 with correlation to the id and the third column
will be sequence information of the next file with respective to the id
original files look like this

45    ytut
46    erete
37   dfasf
45  dassdsd


and so on  for all the 10 files that is it has two column as mentioned
above.

The output should look like this:

Id    file1      file2     file3     file4   file5
43    ytuh    ytuh     ytuh    ytuh    ytuh
46   erteee   rty       ryyy              ertyu
47   yutio    rrr                    eeerr



The goal is if the pick all the common id in the files and with their
respective information in the adjacent rows.
the various conditons ca also prevails
1) common id present in all the files, which have same information
2)common id present in all the files, which donot have same information
3) common id may not be present in all the files

But the goal is exactly find the common id in all the files and add their
corresponding information in the file to the table as per the view
 my script :
def file1_search(*files1):
    for file1 in files1:
        gi1_lis = []
        fh = open(file1,'r')
        for line in fh.readlines():
            data1 = line.strip().split('\t')
            gi1 = data1[0].strip()
            seq1 = data1[1].strip()
            gi1_lis.append(gi1)
        return gi1_lis
def file2_search(**files2):
    for file2 in files2:
        for file in files2[file2]:
            gi2_lis = []
            fh1 = open(file,'r')
            for line1 in fh1.readlines():
                data2 = line1.strip().split('\t')
                gi2 = data2[0].strip()
                seq2 = data2[1].strip()
                gi2_lis.append(gi2)

            return gi2_lis
def set_compare(data1,data2,*files1,**files2):
    A = set(data1)
    B = set(data2)
    I = A&B # common between thesetwo sets

    D = A-B #57 is the len of D
    C = B-A #176 is  the len of c
#    print len(C)
 #   print len(D)
    for file1 in files1:
        for gi in D:
            fh = open(file1,'r')
            for line in fh.readlines():
                data1 = line.strip().split('\t')
                gi1 = data1[0].strip()
                seq1 = data1[1].strip()
            if gi == gi1:
#                print line.strip()
                    pass

    for file2 in files2:
        for file in files2[file2]:
            for gi in C:
                fh1 = open(file,'r')
                for line1 in fh1.readlines():
                    data2 = line1.strip().split('\t')
                    gi2 = data2[0].strip()
                    seq2 = data2[1].strip()
                if gi == gi2:
                   # print line1.strip()
                    pass
if __name__ == "__main__":
    files1 = ["Fr20.txt",\
              "Fr22.txt",\
              "Fr24.txt",\
              "Fr60.txt",\
              "Fr62.txt"]
    files2 = {"data":["Fr64.txt",\
              "Fr66.txt",\
              "Fr68.txt",\
              "Fr70.txt",\
              "Fr72.txt"]}
    data1 = file1_search(*files1)

    """113 is the total number of gi"""
    data2 = file2_search(**files2)
    #for j in data2:
     #   print j
    """232 is the total number of gi found"""
    result = set_compare(data1,data2,*files1,**files2)

 It doesnot work fine... some body please suggest me the way i can proceed .
Thanks a lot

-- 
Beema Shafreen
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From ivan.illarionov at gmail.com  Mon May 26 12:20:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 16:20:26 +0000 (UTC)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com>
Message-ID: <g1eo0a$27k1$1@news.mtu.ru>

On Mon, 26 May 2008 17:49:01 +0200, Sebastian 'lunar' Wiesner wrote:

[...]
> Modern frameworks like Django or Grok require a somewhat great adaption,
> since they strongly restrict the programmer's freedom.  I doubt, that
> you would get Django or Grok working like your asp framework.

Actually, mordern frameworks (at least Djagno) does not "restrict the 
programmer's freedom", they only encourage clean design.

It's perfectly possible to write Django app with only one view and url 
pattern that redirects everything to different template engine like 
Cheetah or Mako and all the logic could be put inside those templates.

But, IMHO, writing PHP-style Python webapp is silly.

Ivan


From kccnospam at glenevin.com  Tue May 20 20:38:22 2008
From: kccnospam at glenevin.com (seanacais)
Date: Tue, 20 May 2008 17:38:22 -0700 (PDT)
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
	<12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>
	<g0tro7$crq$03$1@news.t-online.com>
Message-ID: <eb253f33-db1a-4f38-b317-e779f82cfa12@f24g2000prh.googlegroups.com>

On May 20, 2:40 am, Peter Otten <__pete... at web.de> wrote:
> seanacais wrote:
>
> You have to ensure that the lines
>
> from Tkinter import *
> root = Tk()
>
> are *executed* before the line
>
> dname = dict((d, StringVar()) for d in OPDefaults)
>
> Peter
>
> PS: If you still can't fix your script, please post it completely or,
> better, a small self-contained (runnable) script showing the same problem

I had looked for that, but didn't see it.  After reading your post I
went back
to look again.  Indeed, the initOPValues() function was being called
before
the root=Tk().  I've fixed the order of the calls and my script is
behaving
exactly as I expect now.  Thank you for taking the time to help me.

Kevin


From aquagnu at gmail.com  Mon May 26 00:00:01 2008
From: aquagnu at gmail.com (Yosifov Pavel)
Date: Sun, 25 May 2008 21:00:01 -0700 (PDT)
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
	<98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>
Message-ID: <0ccd6c54-ecd9-46e8-a1f6-5313f3d7a45d@w7g2000hsa.googlegroups.com>

On 24 ???, 12:58, bukzor <workithar... at gmail.com> wrote:
> On May 23, 6:31 pm, Yosifov Pavel <aqua... at gmail.com> wrote:
>
> > Does somebody know existent tool for checking unhandled exceptions?
> > Like in Java when method throws exception but in code using this
> > method, try...catch is missed. May be something like PyChecker?
>
> > --
> > /Pavel
>
> I know that pychecker doesn't do that. The set of handled exceptions
> is probably much smaller than handled. Almost every line of code can
> throw ten different exceptions (at least my code). I'm not sure what
> specifically the output you'd like to see would look like.

OK. I understand point of view of all responders.
It seems I surmised why it's very difficult to do in tool like
PyChecker:
not only functions/methods but usual Python expression can mask
potential
exception source. And this tool must know how to parse every
expression
deep (to object protocol methods, for example). But it's possible in
principle...
And you are right: the output of this tool will be very verbal :-)

Thanks to all


From skanemupp at yahoo.se  Fri May  9 18:19:26 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 9 May 2008 15:19:26 -0700 (PDT)
Subject: regexp help
Message-ID: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>

i want to a little stringmanipulationa nd im looking into regexps. i
couldnt find out how to do:
s = 'poprorinoncoce'
re.sub('$o$', '$', s)
should result in 'prince'

$ is obv the wrng character to use bu what i mean the pattern is
"consonant o consonant" and should be replace by just "consonant".
both consonants should be the same too.
so mole would be mole
mom would be m etc



From matthieu.brucher at gmail.com  Fri May 16 12:36:05 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Fri, 16 May 2008 18:36:05 +0200
Subject: writing python extensions in assembly
In-Reply-To: <kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <e76aa17f0805160936i5625dc34ld6e2dab3810c00f0@mail.gmail.com>

>
> yeah I don't know much about that,  I was figuring perhaps I could limit
> the
> assembler parts / methodology to something I could write generically
> enough.. and if all else fails write for the other OS's or only support
> windows.   also I think I should be using SIMD of some sort, and I'm not
> sure but I highly doubt C++ compilers support SIMD.
>

Well, it is not the OS, but the ASM compiler.
As the other people, I will tell you to implement only the fraction of the
code that needs speed.

For the matter of an ASM Python extension, do not bother. Use a C extension
and embed inside the ASM parts that are needed.

Compilers can use SIMD calls. You can try the auto-vectorization support
(GCC and Visual Studio support it, at least partially). Then you can try
intrinsics that will give you the power of ASM without the troubles. They
are compiler specific, but not less than ASM ;)

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From miller.paul.w at gmail.com  Mon May 26 14:47:05 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 11:47:05 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
Message-ID: <c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>

There is no solid definition of "high level" that one can
unambiguously use to classify programming languages into "high level"
and "not high level," or "low level."

My personal definition is something along the lines of: a high-level
language is one which lets you solve problems without worrying about
"accidental complexity."  By "accidental complexity," I mean such
things as manual memory management, needing to explicitly close files,
etc.

Of course, I consider Python to be "high level."  It's garbage
collected, so, no manual memory management (most of the time --
sometimes the GC needs help); if I want to iterate through a sequence,
I don't have to do crap like

max = len (seq);
for (int i = 0; i < max; ++i) {
    do something with seq[i];
}

I just do:

for item in seq:
   do something with item

Another piece of evidence that points to Python's high-level status is
that if you take a look at some "pretty close to actual programming-
language looking pseudocode," then translate it into Python, typically
the Python code is not much longer than the pseudocode itself.  On the
other hand, translating pseudocode to C or Java often results 50-100%
more lines of code than there were lines of pseudocode.


From anrdaemon at freemail.ru  Tue May 27 21:10:20 2008
From: anrdaemon at freemail.ru (AnrDaemon)
Date: Wed, 28 May 2008 05:10:20 +0400
Subject: php vs python
In-Reply-To: <g1d1a4$1rpd$2@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
Message-ID: <613388153.20080528051020@freemail.ru>

Greetings, Ivan Illarionov.
In reply to Your message dated Monday, May 26, 2008, 04:47:00,

>> As I've said before - good programmers can write good code in any
>> language.

> Yes, they can. But it may be harder to do for them in one language and 
> easier in another.

It's obvious lie. If you have clear mind and you know language you're using,
there are absolutely NOTHING can deny you to write clear code.
Even using forth postfix notation, I have no problem writing good code, it's
as easy as writing bad code. And yes, I do see the difference.


-- 
Sincerely Yours, AnrDaemon <anrdaemon at freemail.ru>



From gilly.dekel at gmail.com  Sun May  4 14:36:42 2008
From: gilly.dekel at gmail.com (Gilly)
Date: Sun, 4 May 2008 11:36:42 -0700 (PDT)
Subject: Real Time Midi File Playback - Reading and Writing midi at the 
	same time
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
	<mailman.551.1209924903.12834.python-list@python.org>
Message-ID: <167e310e-c801-4562-ad28-0c127b9663ef@i76g2000hsf.googlegroups.com>

On May 4, 9:14 pm, David <wizza... at gmail.com> wrote:
> On Sun, May 4, 2008 at 7:11 PM, Gilly <gilly.de... at gmail.com> wrote:
> > Hi
> >  I am trying to create an application that uses some form of input to
> >  create a midi file.
> >  I would like for this to be a 'real time' process. In other words, I
> >  want to be able to begin playing the midi file before I finish writing
> >  it, and continue writing as it plays.
>
> Have you tried the MIDI libraries listed on this page?
>
> http://wiki.python.org/moin/PythonInMusic
>
> David.

Yes. I haven't found anything that would help me out...


From gagsl-py2 at yahoo.com.ar  Thu May 15 04:22:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 05:22:37 -0300
Subject: cgitb performance issue
References: <481F585A.5080707@admailinc.com>
	<op.ua02s3n7x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<482B189C.1050302@admailinc.com>
Message-ID: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 13:51:40 -0300, Ethan Furman <efurman at admailinc.com>  
escribi?:
> Gabriel Genellina wrote:
>> En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman  
>> <efurman at admailinc.com> escribi?:
>>
>>> I tried adding a form to our website for uploading large files.
>>> Personally, I dislike the forms that tell you you did something wrong
>>> and make you re-enter *all* your data again, so this one cycles and
>>> remembers your answers, and only prompts for the file once the rest of
>>> the entered data is good.  However, the first time the form loads it  
>>> can
>>> take up to 30 seconds... any ideas why?
>>
>> Hard to tell without looking at the code... And what has cgitb to do  
>> with this?
>>
> Hmmmm... excellent question, and the answer is -- Nothing.  My
> apologies.  I'm importing cgi (cgitb was while I was debugging it), as
> well as a bunch of others.
>
> Here's the source, with a bunch of the actual html stripped out.  The -u
> as well as the last two lines were an attempt to eliminate the 30-second
> pause while it loads, as it seems to get all data transferred, then just
> waits for a while.  Any ideas appreciated.  My apologies for the ugly  
> code.

*When* do you see the 30-secs delay? After uploading the files? I see  
they're transferred using SMTP, but I think you're not talking about the  
time it takes to send the mail.
I'd use the old-fashioned "print" statement to see *what* gets executed  
and how long it takes each step.

-- 
Gabriel Genellina



From guibog at gmail.com  Sun May 25 23:33:35 2008
From: guibog at gmail.com (Guillaume Bog)
Date: Mon, 26 May 2008 11:33:35 +0800
Subject: php vs python
In-Reply-To: <V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
	<V7OdnScwdtjinafVnZ2dnUVZ_radnZ2d@comcast.com>
Message-ID: <bc5951d00805252033q7cfd1517i2246cc38f907b222@mail.gmail.com>

On Mon, May 26, 2008 at 8:12 AM, Jerry Stuckle <jstucklex at attglobal.net>
wrote:

> Ivan Illarionov wrote:
>
>> On Sun, 25 May 2008 17:09:43 -0400, Jerry Stuckle wrote:
>>
>>> Not at all.  I do it every day.
>>>
>>> And BTW - yes, I write Python, also.  But I find I can write better,
>>> faster code in PHP.
>>>
>>
>> I find I can write better code in Python. Maybe it's just a matter of
>> personal preference?
>>
>>  Do you write PHP?
>>>
>> I did. And I hated it very much. I hated it so much that even I had few
>> Python scripts that generated PHP for me when it was possible.
>>
>>
> So you really don't write PHP.  Enough said.


I write or review PHP code everyday. While much can be done in PHP5 I still
feel Python has a cleaner definition and therefore allows writing faster
clean code.

I many places around I see people saying "doing XX is evil" or "YY
tool/function is now on my blacklist". Most of the time it is because of an
undocumented bug, unpredictable side-effect, or obscure security issue. This
propagates fears, and fears are not, in my opinion and experience, the best
companion of developers. It makes you stick on only the domain you know, and
write code very slowly and defensively. Fear comes from what we don't
understand. Take Regexp for example: when I came first to my current job,
nobody used them, everyone feared them, because Regexp can "bite" (i.e. do
something strange you cannot explain easily). After some time and patiently
explain Regexp sample to my teammates, everyone now want to play with them
(even when using them makes no sense).

If a language makes their users more confident and propagates less fears, I
would say it is better than the others in this respect. PHP has a good
documentation with user comments, which makes me more confident (I'll find a
solution) but, in my opinion, Python is better in this respect because the
way it has been crafted makes me more confident. (Often, when I open a PHP
application, the first 100 lines will be defensive stuff against
magic_quotes or other weird settings, while when I open Python third-party
modules, the first lines are most often nice docstrings, and the next lines
are easy to decipher classes and functions just doing the work.)

PHP did bite me hard (like a wild dog) at least once (postgreSQL NULL values
fetched through pg_fetch_object were both null and not null !... the bug was
very hard to find)

ASP / MSSQL did bite me a lot (like a dangerous snake) with undocumented
bugs, and so on.

Javascript can bite (like a wild cat) but can be domesticated through
frameworks like prototype.js

CSS can bite while HTML usually can't

As everyone knows pythons doesn't bite! (Or at least didn't bite me yet.)


>
>
> --
> ==================
> Remove the "x" from my email address
> Jerry Stuckle
> JDS Computer Training Corp.
> jstucklex at attglobal.net
> ==================
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From workitharder at gmail.com  Wed May 21 18:36:55 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 15:36:55 -0700 (PDT)
Subject: best way to check if pid is dead?
References: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>
	<roy-B25CAD.15131821052008@70-1-84-166.area1.spcsdns.net>
	<7b049fb8-c196-4ff6-873b-3893ab670b95@m3g2000hsc.googlegroups.com>
Message-ID: <b2810bf0-ad4d-43b5-ac8d-96ce68ee99a2@d1g2000hsg.googlegroups.com>

On May 21, 1:27?pm, bukzor <workithar... at gmail.com> wrote:
> On May 21, 12:13 pm, Roy Smith <r... at panix.com> wrote:
>
>
>
> > In article
> > <90ecca29-c4d8-4e89-908a-93850d7de... at i76g2000hsf.googlegroups.com>,
>
> > ?bukzor <workithar... at gmail.com> wrote:
> > > Does anyone have a pythonic way to check if a process is dead, given
> > > the pid?
>
> > > This is the function I'm using is quite OS dependent. A good candidate
> > > might be "try: kill(pid)", since it throws an exception if the pid is
> > > dead, but that sends a signal which might interfere with the process.
>
> > > Thanks.
> > > --Buck
>
> > The canonical way is to do kill(pid, 0). ?If it doesn't throw, the process
> > exists. ?No actual signal is sent to the process either way.
>
> > Of course, the process could exit immediately after the kill() call, so by
> > the time you find out it's alive, it's dead. ?Such is life.
>
> Thanks! That's exactly what I was looking for. A little more
> background:
>
> "If sig is 0 (the null signal), error checking is performed but no
> signal is actually sent. The null signal can be used to check the
> validity of pid."
>
> Taken from :http://www.opengroup.org/onlinepubs/009695399/functions/kill.html


Here are the functions I wrote with this information. There are three
functions:
kill() is similar to os.kill, but returns True if the pid is dead and
throws less exceptions
dead() checks if a process is dead, and gets rid of zombies if
necessary
goodkill() kills a pid by sending gradually harser signals until dead.




def kill(pid, signal=0):
    """sends a signal to a process
    returns True if the pid is dead
    with no signal argument, sends no signal"""
    #if 'ps --no-headers' returns no lines, the pid is dead
    from os import kill
    try: return kill(pid, signal)
    except OSError, e:
        #process is dead
        if e.errno == 3: return True
        #no permissions
        elif e.errno == 1: return False
        else: raise

def dead(pid):
    if kill(pid): return True

    #maybe the pid is a zombie that needs us to wait4 it
    from os import waitpid, WNOHANG
    try: dead = waitpid(pid, WNOHANG)[0]
    except OSError, e:
        #pid is not a child
        if e.errno == 10: return False
        else: raise
    return dead

#def kill(pid, sig=0): pass #DEBUG: test hang condition


def goodkill(pid, interval=1, hung=20):
    "let process die gracefully, gradually send harsher signals if
necessary"
    from signal import SIGTERM, SIGINT, SIGHUP, SIGKILL
    from time import sleep

    for signal in [SIGTERM, SIGINT, SIGHUP]:
        if kill(pid, signal): return
        if dead(pid): return
        sleep(interval)

    i = 0
    while True:
        #infinite-loop protection
        if i < hung: i += 1
        else:
            print "Process %s is hung. Giving up kill." % pid
            return
        if kill(pid, SIGKILL): return
        if dead(pid): return
        sleep(interval)


From __peter__ at web.de  Fri May 23 03:01:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 09:01:20 +0200
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
	<NisZj.288476$pM4.73650@pd7urf1no>
Message-ID: <g15q3v$fdp$02$1@news.t-online.com>

Yves Dorfsman wrote:

> Peter Otten <__peter__ at web.de> wrote:
> 
>> > A slightly similar problem: If I want to "merge," say, list1=[1,2,3]
>> > with list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way
>> > with "zip" to do so?
> 
>> >>> items = [None] * 6
>> >>> items[::2] = 1,2,3
>> >>> items[1::2] = 4,5,6
>> >>> items
>> [1, 4, 2, 5, 3, 6]
> 
> My problem with this solution is that you depend on knowing how many
> elements you have in each list ahead of time. 

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from operator import
add" "list(reduce(add, zip(a, b)))"
1000 loops, best of 3: 637 usec per loop

$ python -m timeit -s"a = [1,2,3]*100; b =
[4,5,6]*100" "items=[None]*(2*len(a)); items[::2] = a; items[1::2] = b"
10000 loops, best of 3: 23.4 usec per loop

The speed gain is significant. Why should I throw away useful information if
I have it? I'd even be willing to convert one arbitrary iterable to a list
to get the length information.

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "aa = list(a);
items=[None]*(2*len(aa)); items[::2] = aa; items[1::2] = b"
10000 loops, best of 3: 29.5 usec per loop

> Assuming that both list 
> are of the same length, then, I find the following more elegant:
> 
> list1=[1,2,3]
> list2=[4,5,6]
> 
> reduce(lambda x, y: x+y, zip(list1, list2))
> 
> of course, zip creates tuples, so you end up with a tuple, therefore if
> you need for your solution to be a list:
> list(reduce(lambda x, y: x+y, zip(list1, list2)))

I'd rather use a plain old for-loop:

>>> from itertools import izip
>>> a = [1,2,3]
>>> b = [4,5,6]
>>> items = []
>>> for chunk in izip(a, b):
...     items.extend(chunk)
...
>>> items
[1, 4, 2, 5, 3, 6]

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from itertools
import izip" "items = []
> for chunk in izip(a, b): items.extend(chunk)"
1000 loops, best of 3: 242 usec per loop

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100; from itertools
import izip" "items = []; extend = items.extend
for chunk in izip(a, b): extend(chunk)"
10000 loops, best of 3: 70.9 usec per loop

> reduce(lambda x, y: x+y, list(zip(list1, list2)) )

list(zip(...)) has no effect here. Possible fixes

>>> reduce(lambda x, y: x + list(y), zip(list1, list2), [])
[1, 4, 2, 5, 3, 6]

>>> reduce(lambda x, y: x.extend(y) or x, zip(list1, list2), [])
[1, 4, 2, 5, 3, 6]

$ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "reduce(lambda x, y:
x.extend(y) or x, zip(a, b), [])"
1000 loops, best of 3: 368 usec per loop

are more complicated than elegant. Not recommended.

Peter


From bignose+hates-spam at benfinney.id.au  Tue May 13 19:43:43 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:43:43 +1000
Subject: built in list generator?
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
	<68uba1F2ur7lkU1@mid.uni-berlin.de>
Message-ID: <87hcd14vo0.fsf@benfinney.id.au>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> globalrev schrieb:
> > if i want  a list with all numbers between x and y is there a way to
> > do this with an inbult function.
> >
> > i mean i can always construct a function to do this but is there
> > soemthing like:
> >
> > nbrs = list(range(50,100, 2))
> 
> range *does* that. use xrange if all you want is to iterate.

Until Python 3.0, where 'range' returns an iterable.

-- 
 \      "It seems intuitively obvious to me, which means that it might |
  `\                                        be wrong."  -- Chris Torek |
_o__)                                                                  |
Ben Finney


From alefnula at gmail.com  Fri May  9 09:02:01 2008
From: alefnula at gmail.com (Viktor)
Date: Fri, 9 May 2008 06:02:01 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
	<g01gmb$ke4$03$1@news.t-online.com>
Message-ID: <f7c8ea77-2a70-4691-a9e7-5cd97fd8dc79@m73g2000hsh.googlegroups.com>

This completely slipped of my mind... :)

I'm trying to change the:
http://wordaligned.org/svn/etc/echo/echo.py

So if the function is method it prints ClassName.MethodName instead of
MethodName(self|klass|cls=<... ClassName>).

But it turned out that in the decorator, the wrapped function is
always just a TypeFunction (I cannot find out if the function is
method, classmethod, staticmethod or just a plain function - tried
with inspect also)... And what is most interesting, when I do:

def w(fn):
    print 'fn:', id(fn)
    return fn

class A:
    @w
    def __init__(self): pass

print 'A.__init__:', id(A.__init__)

It turns out that the function I receive in the wrapper (even when I
return the same function) is not the function which will finally be
attached to the class...

Is there a way to find out in the decorator "what will the decorated
function be"?


From gherron at islandtraining.com  Wed May  7 16:44:46 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 07 May 2008 13:44:46 -0700
Subject: howto print binary number
In-Reply-To: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <482214BE.4040702@islandtraining.com>

dmitrey wrote:
> hi all,
> could you inform how to print binary number?
> I.e. something like
>
> print '%b' % my_number
>
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
>
> Thank you in advance, D
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Python 3.0 has such a formatting operation, but Python 2.x does not.  
However it's not hard to write.

If you really only going to need 8 bits, you can just build a table of 
bit patterns for each integer.  Try this bit of slight cleverness:

 >>> b = ['']
 >>> for k in range(8):
...          b = [i+j for i in ['0','1'] for j in b]
...
 >>> len(b)
256
 >>> b[63]
'00111111'


Gary Herron



From gandalf at shopzeus.com  Thu May 15 05:54:29 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 11:54:29 +0200
Subject: create window on panel
In-Reply-To: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
Message-ID: <482C0855.6010006@shopzeus.com>

Jimmy wrote:
> Hi, all
>
> I have been trying to use wxPython to design a GUI that will be
> displayed on the panel on the top of desktop. that is when the
> program starts, it will dwell on the panel to display some dynamic
> information.
>
> can anyone tell me in wxPython how to do this? thanks!
>   
AFAIK it cannot be done in pure wxPython. The reason is that your 
"panel" is part of the window manager. What kind of "panel" are you 
talking about anyway? Under Microsoft Windows it is called "the tray". 
In Gnome it is "panel" indeed. In KDE it might also be panel, there is 
OS X etc. They are quite different. For example, under MS Windows you 
cannot embed an application into the tray (other than an icon).

They are all different window managers, based on different client libs 
(MS gui, GTK, Qt etc.). wxPython is designed to be platform independent, 
and  it does not support special, platform dependent features. (Well it 
does a few...)

You need to tell us what kind of system are you using? Then we can tell 
you where to start. For example, there are extension modules for writing 
Gnome panel applications. (Well, it is not wxPython but GTK.)

BTW the idea is good: we could have "panel" support in wxPython, but 
since the interface of these panels (and how they should be programmed) 
is very different on different platforms, it would not be easy to implement.

   Laszlo



From gnewsg at gmail.com  Tue May 13 19:44:11 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 16:44:11 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <mailman.1076.1210713955.12834.python-list@python.org>
Message-ID: <f9cc40fa-20ff-4936-9ed0-0b6cad014ca3@y38g2000hsy.googlegroups.com>

On 13 Mag, 23:25, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 13 May 2008 14:05:43 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
> >> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>
> >> >> We do not live in a pure world, Python isn't pure (practicality beats
> >> >> purity), and by attempting to send some data each time a .push*()
> >> >> method is called, there are measurable increases in transfer rates.
>
> >> >Good point. I'd like to ask a question: if we'd have a default
> >> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
> >> >such problem?
> >> >I've always found weird that asyncore has such an high default timeout
> >> >value.
> >> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>
> >> I'm not sure this is right. ?What timeout are we talking about? ?Twisted
> >> only wakes up when necessary.
>
> >> Jean-Paul
>
> >I'm talking about the asyncore.loop timeout parameter which defaults
> >to 30 (seconds).
> >I don't think that Twisted only wakes up when necessary (surely not by
> >using the select reactor).
> >Think about the schedule calls feature (reactor.callLater).
> >To have that work I guess that a continuous loop must always be kept
> >alive, regardless of the reactor used.
>
> To support scheduling calls, you just have to know when the next call is
> going to happen. ?Then, you can wake up at exactly that time. ?This is
> what Twisted does, even for select reactor. ;)

Yes but how do you know when it's the time to fire up a call without
using a thread?
You are forced to call time.time() periodically and check if that time
had come every time.
Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
That's where that should happen.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From __peter__ at web.de  Wed May 28 19:54:17 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 01:54:17 +0200
Subject: Threads and import
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <g1krb1$8vh$03$1@news.t-online.com>

rsoh.woodhouse at googlemail.com wrote:

> Hi,
> 
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
> 
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
> 
> import threading
> class TestThread(threading.Thread):
> 
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
> 
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
> 
> # end of sample script
> 
> Now if I run this using:
> 
> $ python ThreadTest.py
> 
> then it behaves as expected, ie an output like:
> 
> start
> finish
> 0
> 1
> 2
> ...
> 
> But if I run it as follows (how the inherited code was started):
> 
> $ python -c "import TestThread"
> 
> then I just get:
> 
> start
> 
> 
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

You might be interested in reading

http://groups.google.com/group/comp.lang.python/browse_thread/thread/01dbc25e6d1a2662/dcf55f1475dc529f

Peter


From angry-chris at hotmail.com  Wed May 21 04:58:54 2008
From: angry-chris at hotmail.com (Freaky Chris)
Date: Wed, 21 May 2008 01:58:54 -0700 (PDT)
Subject: Typeerror
In-Reply-To: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
Message-ID: <17358932.post@talk.nabble.com>


This is a simple error, you are passing the variable res as an interger to
use for a slice when what ever you are storing in res isn't an integer.

Chris

Beema shafreen wrote:
> 
> Hi all,
> I getting the following error when i run my scirpt ,
> can somebody help me regarding this to solve the type error problem
> 
> 
> Traceback (most recent call last):
>   File "get_one_prt_pep.py", line 59, in ?
>     if len(data[res])<=1:
> TypeError: string indices must be integers
> 
> 
> -- 
> Beema Shafreen
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
View this message in context: http://www.nabble.com/Typeerror-tp17358659p17358932.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From castironpi at gmail.com  Fri May  9 22:11:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 19:11:37 -0700 (PDT)
Subject: Python and the Bartender
Message-ID: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>

Incidentally, now that everyone knows English, writer would like to
critique his behavior.  I have leaned to the group for approval, at
times by disparaging the efforts of others, but other times not.  I
have expressed negative emotion.  Is anyone in earshot getting work
done that I am interfering with?

Otherwise, I might start telling jokes.

Sincerely,
Two For Bartenders.

P.S.  Please don't write the movies.


From vavasis at cpu111.math.uwaterloo.ca  Fri May 23 13:12:43 2008
From: vavasis at cpu111.math.uwaterloo.ca (Stephen Vavasis)
Date: Fri, 23 May 2008 17:12:43 +0000 (UTC)
Subject: array of 64-bit ints?
Message-ID: <g16tub$qoj$1@rumours.uwaterloo.ca>

Is it possible to have an array of 64-bit-ints using the standard Python 
array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
"long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
"long long int" or "size_t".  However, according to the Python array 
documentation, arrays of "size_t" or "long long int" are not available.

Thanks,
Steve Vavasis, vavasis at math.uwaterloo.ca




From deets at nospam.web.de  Sat May 10 08:13:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 10 May 2008 14:13:04 +0200
Subject: Find more than one error at once
In-Reply-To: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <68lhqrF2tlavsU1@mid.uni-berlin.de>

Joseph Turian schrieb:
> Is it possible to coax python to find more than one error at once?

What kind of errors? Syntax-errors? Then use one of the python source 
code analyzers, such as pylint or pychecker.

Diez


From basti.wiesner at gmx.net  Sun May 25 05:04:42 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 11:04:42 +0200
Subject: need some help in serving static files inside a wsgi apps
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com> <48391E5D.5050106@v.loewis.de>
Message-ID: <g1ba4q$vnb$02$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ "Martin v. L?wis" <martin at v.loewis.de> ]

>> I guess, Apache does some kind of memory caching for files, which are
>> often requested and small enough to fit into the system memory.
> 
> Are you sure about this? 

No, I'm not.  That's why I said "I guess" ;)

> Also, I don't see the need for Apache to cache frequently requested
> files itself. Instead, the operating system will cache frequently
> requested directories and files in memory, and it will do the same for
> a Python web server.

Of course, a modern OS kernel will perform caching anyway, but this is most
likely slower than in-process caching, since it will still require context
switches from userspace into kernel space.

Considering this, it seems reasonable to me, that apache does memory
caching, but I'm by far not sure, I wouldn't put a bet on this ;)

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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=K3tE
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From slianoglou at gmail.com  Thu May 29 22:56:29 2008
From: slianoglou at gmail.com (Steve Lianoglou)
Date: Thu, 29 May 2008 19:56:29 -0700 (PDT)
Subject: Getting up and running with Python on a Mac
References: <7d593f8a-92b8-4dfe-935f-dd6a22c70faf@m45g2000hsb.googlegroups.com>
Message-ID: <5c625313-5987-4ed1-a29b-f431a16db92f@56g2000hsm.googlegroups.com>

> I want to do a fair bit of scientific /
> numerical computing, so it would seem that SAGE ot the Enthought
> Python distribution would seem to be the most relevant ?- I'd
> appreciate your guidance on getting Python to run on a Mac with a
> particular focus on these two distributions.

As already mentioned, you can use the already installed Python that
comes with Leopard (2.5.1), or you can download the latest from
python.org (2.5.2).

Either way, another way do get a scientific environment up and running
is by getting the "Scipy Superpack" installer. It's a frontend that
downloads and installs the latest scipy/numpy/matplotlib/ipython combo
(from their SVN repos). The author updates the builds every so often,
so you can for the most part run with the latest updates:

http://macinscience.org/?page_id=6

If you're using the Python that comes with Leopard, it will be very
straightforward and you'll have nothing else to do aside from running
the Superpack installer.

If you want to use the latest Python from Python.org, there will be
some trickery, which includes:

(i) getting the correct (newer) python to come first in your path,
(ii) installing setuptools for the new python
(iii) insuring that the new setuptools easy_install is "the one" in
your path
(iv) install the latest OS X wxPython build (from their website).

It's all fairly straightforward once you account for the
aforementioned gotchas.

As far as the enthought installer goes, I wasn't aware that it was
ready for showtime on OS X ... do you know otherwise?

HTH,
-steve


From daveparker at flamingthunder.com  Wed May 21 18:11:18 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 15:11:18 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
Message-ID: <f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>

On May 21, 3:41?pm, "Chris Mellon" <arka... at gmail.com> wrote:
> When told why you got different results (an answer you
> probably already knew, if you know enough about IEEE to do the
> auto-conversion you alluded to) ...

Of course I know a lot about IEEE, but you are assuming that I also
know a lot about Python, which I don't.  I assumed Python was doing
the auto-conversion, too, because I had heard that Python supported
arbitrary precision math.  Jerry Hill explained that you had to load a
separate package to do it.

> you treated it as another opportunity
> to (not very subtly) imply that Python was doing the wrong thing.

This person who started this thread posted the calculations showing
that Python was doing the wrong thing, and filed a bug report on it.

If someone pointed out a similar problem in Flaming Thunder, I would
agree that Flaming Thunder was doing the wrong thing.

I would fix the problem a lot faster, though, within hours if
possible.  Apparently this particular bug has been lurking on Bugzilla
since 2003: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:02:27 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:02:27 +0200
Subject: PHP + TinyButStrong Python replacement
In-Reply-To: <fvuj4k$74h$1@aioe.org>
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
	<efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>
	<fvuj4k$74h$1@aioe.org>
Message-ID: <48240513$0$3596$426a74cc@news.free.fr>

pistacchio a ?crit :
> bruno.desthuilliers at gmail.com ha scritto:
>> On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
>>> George Sakkis ha scritto:
>> (snip)
>>>> What does it matter if it's a single file or a dozen under a package ?
>>>> "Installation" for pure Python packages can be as simple as copying
>>>> the package under any directory in your PYTHONPATH.
>>> well, it doesn't matter if it's a single file or a package, but it
>>> _does_ matter if you have to put them under the path where python is
>>> installed because, in a typical shared web hosting environment (such the
>>> one that i use) you don't have access to system directories.
>>
>> You *never* have to install anything in the default path - install
>> your python libs wherever you want, and just make sure this wherever
>> is in your python path (usually via the PYTHONPATH environment
>> variable).
>>
> 
> again, in a shared environment, you don't have access to environment 
> variables.

Depends on the "shared environment". But even if you can't set 
PYTHONPATH, you can always import sys and append (or prepend) to 
sys.path before doing any other import.

 > all you can do is copy files in your own little directory,
> and that's it. this directory is never something like /share/python, but 
> something like /home/averagejoe. and /home/averagejoe is not usually in 
> the PYTHONPATH
> 
>>>> Check out Mako (http://www.makotemplates.org/), it's pretty powerful
>>>> and fast.
>>> woudl you suggest mako over cheetah?
>>
> 
>> As far as I'm concerned, I would.  Now if you're looking for a
>> somewhat barebone MVC framework, you may want to have a look at
>> web.py.
>>
> 
> i've tried mako. sees to work fine for me, both for its potential and 
> for its "installation" method. in fact i just copied it under my own 
> directory
> 
> /home/averagejoe
>   test.py
>   /mako
>     mako stuff
> 
> and the following testcase worked well:
> 
> from mako.template import Template
> mytemplate = Template("hello world!")
> print mytemplate.render()
> 
> can i do the same with web.py?

Can't tell, never used it. But how to deploy it is very certainly 
documented on the project's page.

> mind that i work under an apache 
> environment (mod_python).

mod_python ? Fine. And, if I may ask, did you actually took time to read 
the FineManual(tm) ?-)

http://www.modpython.org/live/mod_python-3.3.1/doc-html/dir-other-pp.html


> now, back to mako. can you provide an example of blocks and nested 
> blocks in mako? the documentation doesn't seem to be too clear in this 
> reguard.
> 
> for example, if i want to show a table with a list of restaurants 
> (gathered from a db query), i can construct a template like this:
> 
> <table>
> % for rest in restaurants:
>   <tr>${rest}<tr>
> % endfor
> </table>
> 
> but what if if each restaurant has a list of dishes (pasta, pizza, meat, 
> pie)

Depends... What kind of object is 'rest' ? How is this list named ?

> and some (or each) dish has the ingrediets?

Same question.

> is it just like 
> embedding pure python into the template ( like $(rest['dish'])  and 
> $rest['dish']['ingredient']) )?

What goes inside ${} are ordinary Python expressions, yes.



From sprinkles.chris at gmail.com  Sat May 10 01:13:48 2008
From: sprinkles.chris at gmail.com (Chris Sprinkles)
Date: Sat, 10 May 2008 01:13:48 -0400
Subject: How to call a file
Message-ID: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>

I'm still having trouble with calling a text file and I know its so simple
here is the code
----------------------------------------------------
work = open('C:\Documents and Settings\Administrator\My
Documents\Chris\Python\Python\work.txt', 'r')
for line in work.txt:
    print line
-----------------------------------------------------
Ok so I know that the directory is right cause I'm not a complete idiot but
I keep getting an error? What am I missing here?
-Chris-
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From vbgunz at gmail.com  Wed May 14 12:21:10 2008
From: vbgunz at gmail.com (vbgunz)
Date: Wed, 14 May 2008 09:21:10 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
Message-ID: <0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>

> > Instance methods make the most sense. A static method makes sense too
> > *but* I can see how a class method not only does what a static method
> > does but how a class method *also* gets the cls reference for free.
>
> I don't understand the last part - but I certainly agree on the "instance
> methods make the most sense". But *if* you want a hierarchy
> of "sensefulness",
>
> method > classmethod > staticmethod

OK, I am sold. If in case I find myself needing a static-method, I'll
simply make it a class-method instead. One thing that stuck out from
earlier and I'll compare it to linking is the "relative" usefulness of
cls. There are 2 conditions I can immediately come up with. 1, rename
the class and the class method still works. 2, move the method from
working on one particular class and it'll most likely work unchanged
(w/ the same interface) in another.

Other than the 2 reasons above (2 making more sense), what is a really
good reason to pull out the class method. In other words, when you see
one, what is the first thing that comes to mind? When you write one,
what was the first thing on your mind? Other than "similar to static-
methods", at what point will you be glad you used one? To sum it up,
what is the best role for a class-method that does not turn your work
into code-soup?



From andre.roberge at gmail.com  Wed May 21 19:20:33 2008
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9?=)
Date: Wed, 21 May 2008 16:20:33 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
Message-ID: <a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>

On May 21, 8:13 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> I'm not sure if Python can do this, and I can't find it on the web. So,
> here it goes:
>
> try:
>     some_function()
> except SomeException:
>     some_function2()
>     some_function3()
>     ...
>     # somehow goto 'try' block again
>
> In case it's not clear what I meant: after executing some_function()
> exception SomeExcpetion gets risen. Then, in except block I do something
> to fix whatever is causing the exception and then I would like to go back
> to try block, and execute some_function() again. Is that doable?

How about something like the following (untested)

done = False
while not done:
  try:
     some_function()
     done = True
  except:
     some_function2()
     some_function3()

Andr?


>
> Thanks.
>
> --
>  _______                                        Karlo Lozovina - Mosor
> |   |   |.-----.-----.     web:http://www.mosor.net|| ICQ#: 10667163
> |       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
> |__|_|__||_____|_____|



From Marcohornung at hotmail.com  Wed May 28 07:25:30 2008
From: Marcohornung at hotmail.com (Marco Hornung)
Date: Wed, 28 May 2008 04:25:30 -0700 (PDT)
Subject: BeautifulSoup: problems with parsing a website
Message-ID: <06ae8eb8-6879-4f12-9366-a7e938baa87f@a1g2000hsb.googlegroups.com>

Hy guys,

I'm using the python-framework BeautifulSoup(BS) to parse some
information out of a german soccer-website.
I spend some qualitiy time with the BS-docs, but I couldn't really
figure out how to get what I was looking for.

Here's the deal:
I want to parse the article shown on the website. To do so I want to
use the Tag " <div class="txt_fliesstext">" as a starting-point. When
I have found the Tag I somehow want to get all following "br"-Tags
until there is a new CSS-Class Style is coming up.
I tried several options in the findAll()-command, but nothing seems to
work.(like: soup.findAll('br',attrs={'class':'txt_fliesstext'}, text
=True) - This one comes with a thound addtional Tag that I don't want
to have, or soup.findAll(attrs={'class':'txt_fliesstext'}) - This
gives me a much better Result, but in this case I only get some few
Tags, instead of all the Tags I want)

Any suggestions?
Thanks in advance!

Website:
http://www.bundesliga.de/de/liga/news/2007/index.php?f=94820.php
Some html-code of the website:
<div id="area_headline">
      <div class="txt_headline_red">Erst H?henflug, dann Absturz</
div>
    </div>
    <div id="area_fliesstext">
      <div class="txt_fliesstext_bold">Mit 28 Punkten stand der KSC
nach der Hinrunde sensationell auf Platz 6.</div>
      <br><br>
      <div class="txt_fliesstext">Doch in der R?ckrunde brachen
die Badener regelrecht ein und holten nur noch 15 Z?hler.<br />
<br />
43 Punkte reichten am Ende f?r den 11. Tabellenplatz, ein mehr
als respektables Ergebnis f?r einen Aufsteiger.<br />
<br />


From gabe at dragffy.com  Thu May 15 06:50:47 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:50:47 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<482c1226$0$28403$426a34cc@news.free.fr>
Message-ID: <loom.20080515T105038-896@post.gmane.org>

Bruno Desthuilliers <bruno.42.desthuilliers <at> websiteburo.invalid> writes:


> The problem here is that your first statement
> 
> #>>> tasks = [[]]*6
> 
> creates a list (task) containing 6 references to the *same* (empty) list 
> object. You can check this easily using the identity test operator 'is':
> 

> If you want 6 different list objects in tasks, you can use a list 
> comprehension instead:
> 
> #>>> tasks = [[] for i in range(6)]
> #>>> tasks
> [[], [], [], [], [], []]
> #>>> tasks[0].append(1)
> #>>> tasks
> [[1], [], [], [], [], []]
> 
> HTH
> --
> http://mail.python.org/mailman/listinfo/python-list

Hi Bruno

Thanks for clearing that up. Your example certainly works well, I will study
list comprehension a little more.

Many thanks

Gabriel






From bamytyvibop55 at hotmail.com  Wed May 21 20:51:10 2008
From: bamytyvibop55 at hotmail.com (bamytyvibop55)
Date: Wed, 21 May 2008 20:51:10 -0400
Subject: We have the most detailed Copies
Message-ID: <BLU128-DAV377CA9C411E6F14260504B7C60@phx.gbl>

We carry on the best Replica's

Every type and style

http://lyrolarugoz58.blogspot.com




From eduardo.padoan at gmail.com  Fri May 30 08:16:14 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 30 May 2008 09:16:14 -0300
Subject: should I put old or new style classes in my book?
In-Reply-To: <eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
	<eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>
Message-ID: <dea92f560805300516o10d61fa5l923608b73663c52@mail.gmail.com>

On Thu, May 29, 2008 at 3:06 PM, Jason <tenax.raccoon at gmail.com> wrote:
> I've got Python 3.0 alpha 2.  In this version, it looks like you can
> define classes in either the old style or new style.  (I snipped the
> top line a bit in the following example):

Wrong. Py3k Classes are always new-style. They subclass object
implicitly when no superclass is given.

> Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
> Type "help", "copyright", "credits" or "license"
>>>> class one(object): pass
> ...
>>>> class two: pass
> ...
>>>> two
> <class '__main__.two'>
>>>> one
> <class '__main__.one'>
>>>> type(one)
> <type 'type'>
>>>> type(two)
> <type 'type'>
>>>>

Both classes are new style.


-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From arnodel at googlemail.com  Fri May 16 17:02:28 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 16 May 2008 22:02:28 +0100
Subject: namespaces and eval
References: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>
Message-ID: <m24p8y7yjf.fsf@googlemail.com>

dave.g1234 at gmail.com writes:

> Sorry for the repost, didnt' quite finish
>
> Suppose I have a function in module X that calls eval e.g,
>
> X.py
> _______
> Def foo(bar):
>         Eval(bar)
> _______
>
> Now eval will be called using the default eval(bar,globals(),locals())
> and globals will pull in anything in module X.
>
> Now I have module Y that calls bar like so
> Y.py
> ________
> from x import *
> def biz():
>         print "Im a silly example!"
> Foo("biz()")
> _______
>
> Python will complain that it cannot find biz because it's not the X
> module.
>
> My question - is there any way to a) get a listing of active namespaes
> search ALL active namespaces for a particular variable

sys.modules gives you all the live modules.

> b) get the namespace of the caller withing passing it in (here, Y)

sys._getframe(1).f_globals (resp. sys._getframe(1).f_locals) gives you
the caller's globals (resp. locals).

> c) do anything else to get biz without passing
> foo("biz()",locals(),globals()) or hacking biz into the __builtin__
> namespace(don't know if it's even possible, but it defeats the
> purpose of what I'm trying to do) ?

Functions in Python are objects like any other, and can be passed as
parameters.  I.e:

x.py
----------
def foo(bar):
    bar()

>>> from x import foo
>>> def biz(): print "Boo!"
>>> foo(biz)
Boo!
>>>
 

> I realize this is here for a reason, but I'm working on something
> that's kind of a hack already
>
> Thanks
> dave
>
>
> More gratuitous context. Long story I'm trying to write a hack for a
> concise way of adding arbitrary methods to objects for JPA/JQuery like
> chaning eg.
>
> def foo(self):
>     print "foo"
>     return self;
>
> wrap(x).foo().foo().foo().foo() etc....

What about a composition function instead? I.e.

compose(foo, foo, foo, foo)(x)

Here's one that I made earlier:
http://www.marooned.org.uk/~arno/python/compose.html

[snip]

-- 
Arnaud


From kyrie at uh.cu  Fri May  9 01:11:32 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Fri, 09 May 2008 01:11:32 -0400
Subject: Mathematics in Python are not correct
In-Reply-To: <3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
	<1210306536.4823cfe8be627@comuh.uh.cu>
	<3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>
Message-ID: <1210309892.4823dd04b2924@comuh.uh.cu>

Quoting Ian Kelly <ian.g.kelly at gmail.com>:

> On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
> >  Weird, I can't find neither... (which wikipedia article? Couldn't find one
> about
> >  C99.)
> 
> Try http://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power

Thanks!
Interesting reasoning... both ways ("undefined" for real exponents, 1 for
combinatory/set-theory). It would be way too confusing to have 0**0=1 and 0**0.0
undefined, so I guess is best to follow convention.

[now, I would really like to see 0/0=nan...]

-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie
--
"Al mundo nuevo corresponde la Universidad nueva"
UNIVERSIDAD DE LA HABANA
280 aniversario 


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:51:06 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:51:06 -0300
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <op.ua29rgcwx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:28:03 -0300, <dannywebster at googlemail.com> escribi?:

> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
>>>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'

You meant readlines(), I presume. A file acts as its own iterator:

f=os.open("./get_hostnames")
try:
   for line in f:
     # do something with line
finally:
   f.close()

-- 
Gabriel Genellina



From stef.mientki at gmail.com  Sat May 24 06:00:01 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 12:00:01 +0200
Subject: SQLite import fails sometimes ?
Message-ID: <4837E721.7000108@gmail.com>

hello,

The import statement "import sqlite3" gives the error given below.
In simple programs, the import statement (sometimes) succeed,
and I can indeed access the database.
So I guess there is some conflict with another part of my program,
but as the program is rather large (and dynamic) it's not easy to 
isolate the problem.
Does anyone has a clue how to trace this kind of problem ?

thanks,
Stef

Traceback (most recent call last):
  File "bricks\brick.py", line 322, in Exec
    self.Generate_Output_Signals ()
  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
    import sqlite3
  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
    from dbapi2 import *
  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ImportError: DLL load failed: Invalid access to memory location.


From arnodel at googlemail.com  Sat May 10 04:06:17 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 10 May 2008 09:06:17 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
	<m2mymz45u2.fsf@googlemail.com>
	<54f75240-d8ee-482c-baea-d37bf3900b76@i36g2000prf.googlegroups.com>
	<op.uawq8posev04yd@hungvista>
Message-ID: <m2iqxm4m86.fsf@googlemail.com>

"Kam-Hung Soh" <kamhung.soh at gmail.com> writes:

> On Sat, 10 May 2008 07:19:38 +1000, <umpsumps at gmail.com> wrote:
>
>>> > What would be the best method to print the top results, the one's that
>>> > had the highest amount of anagrams??  Create a new histogram dict?
>>>
>>> You can use the max() function to find the biggest list of anagrams:
>>>
>>> top_results = max(anagrams.itervalues(), key=len)
>>>
>>> --
>>> Arnaud
>>
>> That is the biggest list of anagrams, what if I wanted the 3 biggest
>> lists?  Is there a way to specific top three w/ a max command??
>>
>
> Built-in max() function only returns one result.
>
> My solution is to make a sorted list and return last three items:
>
> sorted((len(anagrams[key]), key) for key in anagrams.keys())[-3:]

Using the key= parameter of sorted() beats explicit DSU:

sorted(anagrams.itervalues(), key=len)[-3:]

Or even

sorted(anagrams.itervalues(), key=len, reverse=True)[:3]

-- 
Arnaud


From hdante at gmail.com  Mon May 19 11:21:08 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 08:21:08 -0700 (PDT)
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org> 
	<5d56b071-1184-4112-bd82-89c00975b939@m73g2000hsh.googlegroups.com> 
	<mailman.1343.1211203732.12834.python-list@python.org>
Message-ID: <75dc8fc3-aef0-44ee-a6df-059f8cd2e226@d45g2000hsc.googlegroups.com>

On May 19, 10:28?am, Laszlo Nagy <gand... at shopzeus.com> wrote:
>
> I don't think that it is important. But if you are interested:
>
> - yes, the server will probably be I/O bound, not CPU bound
> - I'm have experience with thread programming, but not with twisted

 That part was just to show you that being multithreaded is not really
a requirement. The server could be single-threaded, for example.
Surely, if you are comfortable with writing a threaded server, there's
no problem with that.

>
> No. "Image binary data -> base64encode -> XML -> gzip" - looks very
> silly. It cannot be efficient. Do you have better ideas?>> BTW I do not care about the

 Okay, that would be silly. The questions above considered that you
would be sending typical unserialized objects that would be serialized
to XML, not pre-serialized binary data.

> use it. The server is different: it must be safe against external
> attacks. Maybe it was my bad English? Sorry for the misunderstanding.> ?In general I

 That part was a joke. You didn't have to answer that. :-P

> I cannot predict "acceptable speed" requirements, but I can tell that
> there will be some clients downloading 100MB report files from the
> server, so I presume that I will need a progress bar. I think that I
> need to develop my own protocol for this, and probably the underlying

 Okay, so you need to wrap large binary files in some kind of message,
without pre processing them. I think developing your own protocol
using XDR is a safe bet.

> layer should use binary representation.>> Before I start re-inventing the wheel:

 If you are worried about not reinventing the wheel, there are a
couple of solutions I can think of. None of them seem to fully support
you security and session management requirements, so you should
estimate the required project/development time for them.

 - You may create a standard web application for that (with Django ?).
Binary transfers simply use HTTP and have trivial overhead. You have
to implement security and session management (cookies ?) on top of
that.

 - Subclass BaseHTTPServer to implement a stateful and secure
protocol. Again, binary transfers have trivial overhead.

 - If the goal of the project is to provide versioned file support,
you could use a dpkg/apt (or RPM?) based installation system (it uses
HTTP and FTP for file transfers). Write trivial front-ends in the
client and the server and choose a secure HTTP server.

 - Finally, if you want to create your own protocol, but don't want to
use XDR, you could to a similar thing using MIME based messages (the
first message part is a XML message that references the binary
attachments).

> It is NOT the best way. Just to tell one example: big endian / little
> endian integers. Definitely I need some encoding.

 Huh ? XDR does exactly that.

>
> (But if you are right and this is the best way, why would you avoid?)

 I would avoid packing/unpacking objects by hand.



From Since_humans_read_this_I_am_spammed_too_much at spamyourself.com  Fri May 23 07:37:38 2008
From: Since_humans_read_this_I_am_spammed_too_much at spamyourself.com (Erwin Moller)
Date: Fri, 23 May 2008 13:37:38 +0200
Subject: php vs python
In-Reply-To: <48369413$0$25059$607ed4bc@cv.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <4836ac7b$0$14350$e4fe514c@news.xs4all.nl>

Andrew Lee schreef:
> notbob wrote:
>> I'm not posting this just to initiate some religious flame war, though 
>> it's
>> the perfect subject to do so.  No, I actaully want some serious advice 
>> about
>> these two languages and since I think usenet is the best arena to find 
>> it,
>> here ya' go.
>>
>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  
>> Yet, I
>> want learn the guts of it instead of just booting up some wordwank or
>> whatever.  I started to learn python, but heard php was easier or 
>> faster or
>> more like shell scripting or... fill in the blank.  Anyway, so I 
>> change over
>> to learning php.  Then I run across that blog, Coding Horror, and start
>> reading articles like this:
>>
>> http://www.codinghorror.com/blog/archives/001119.html
>>
>> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
>> much.  I can setup mysql and apache,, but don't know how to use 'em, 
>> really.
>> I use emacs and run slackware and can fumble my way through bash scripts,
>> but I can't really write them or do lisp.  I've taken basic basic and 
>> basic
>> C, but am barely literate in html.  Sometimes it seems overwhelming, 
>> but I
>> persevere because it's more fun/challenging than video games, which 
>> bore me
>> to tears. 
>> Well, that's my actual question, then.  Is php really so bad I'm just
>> wasting my time?  Or is it really the quickest way to blog functionality?
>> Would I be better served in the long run learning python, which claims 
>> to be
>> easy as pie to learn/program (still looks hard to me).  I admit I'm no 
>> code
>> geek.  But, I'm not completely brain dead, either, and I need 
>> something to
>> keep my geezer brain sparking.  What say ye?
>>
>> nb
> 
> Personally, I believe PHP would get you more productive more quickly for 
> a blog, but it is a potentially brain damaging language in terms of 
> really getting your juices flowing with programming.  It is not a 
> general purpose language and suffers from all the limitations of of a 
> tool designed for one job.  If you are interested in programming and the 
> blog is your path to that, stick with Python!  In particular, immerse 
> yourself in mod_python or look at a framework like Django or Pylons -- 
> the learning curve is steep for any of these technologies but they are a 
> full meal compared to saltine cracker and water of PHP.

Some statement Andrew.
Care to clarify that a little?
I don't know much Python (aside from a little in ZOPE), but I did a lot 
of Java, Perl, VB/ASP (juck), and a little C before I learned PHP.
I stopped using all in favor of PHP.

If your statement says PHP is abused a lot, yes. Because it is 
relatively easy to learn for new programmers, a lot of bad PHP coders 
exist.
But I saw them too in Java/Perl/etc.
And I am sure you can find them too coding Python.

It is perfectly possible to write clean good code in PHP.

Why do you say it 'tastes less' then Python?
I don't want to start a religious war, but am curious.
Who knows, maybe  I'll dump PHP and start using Python after your 
answer. ;-)

Regards,
Erwin Moller


From netizen at gmx.de  Fri May 23 08:07:12 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 14:07:12 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
Message-ID: <nsbd349tlkc5o7h280f71h7aoov1vnavon@4ax.com>

.oO(Andrew Lee)

>Personally, I believe PHP would get you more productive more quickly for 
>a blog, but it is a potentially brain damaging language in terms of 
>really getting your juices flowing with programming.  It is not a 
>general purpose language

Please elaborate.

>and suffers from all the limitations of of a 
>tool designed for one job.

Please elaborate.

And what "one" job are you talking about? There are many things possible
with PHP: web apps, shell scripts, daemons, GUI apps ...

>If you are interested in programming and the 
>blog is your path to that, stick with Python!

<flame>Where whitespace is more important than the code.</flame>

Seriously, it's just a question of personal taste and preferences. In
terms of capabilities there's absolutely no difference between PHP and
Python. You need a good understanding of programming in general for
both, the rest is just syntax and the available standard libraries.

>In particular, immerse 
>yourself in mod_python or look at a framework like Django or Pylons -- 
>the learning curve is steep for any of these technologies but they are a 
>full meal compared to saltine cracker and water of PHP.

If you don't like PHP, that's perfectly OK. But you should accept that
it's only a tool and just as good as the one who uses it. For me and
many others it's a quite good language, we're able to write clean and
efficient code with it in a rather short time.

PHP is much more than just crackers and water. Of course you should know
how to cook.

Micha


From ivan.illarionov at gmail.com  Tue May 27 22:45:44 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 02:45:44 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
	<g1iem8$r5$3@news.mtu.ru>
	<nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>
Message-ID: <g1ih0n$1lj$1@news.mtu.ru>

On Tue, 27 May 2008 22:27:40 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
>> 
>>> Ivan Illarionov wrote:
>>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>>
>>>>> Greetings, Ivan Illarionov.
>>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>>
>>>>>>> As I've said before - good programmers can write good code in any
>>>>>>> language.
>>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>>> and easier in another.
>>>>> It's obvious lie. If you have clear mind and you know language
>>>>> you're using, there are absolutely NOTHING can deny you to write
>>>>> clear code. Even using forth postfix notation, I have no problem
>>>>> writing good code, it's as easy as writing bad code. And yes, I do
>>>>> see the difference.
>>>> No. Language does matter.
>>> Not for a good programmer.  Only for half-assed ones.
>> 
>> No. Language does matter
> 
> Only to half-assed programmers.  Good programmers can write good code in
> any language they know.
> 
> Ever seen good assembler?  It can be done - really!  Also fortran,
> cobol, forth... the list goes on.

Yeah,
mov eax, Jerry
mov killfile, eax


From d3vvnull at gmail.com  Thu May  1 08:08:22 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 1 May 2008 07:08:22 -0500
Subject: Is vs Equality Operator
In-Reply-To: <48198915.3020804@islandtraining.com>
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
	<48198915.3020804@islandtraining.com>
Message-ID: <170543c70805010508h155470b5mfee31718d61fdf19@mail.gmail.com>

'is' tests for identity (variable references the same memory location) while
'==' tests for equality.  Though it's probably best to use 'is' with more
complex classes and not the simpler built-in types like integers.
See how 'is' works for lists below:

>>> l1 = [1,2,3,4]
>>> l3 = [1,2,3,4]
>>> l1 == l3
True
>>> l1 is l3
False
>>> l2 = l1
>>> l1 is l2
True

l1 and l3 are equal because they contain the same elements. But they are not
identical because they reference different list objects in memory.  On the
other hand, l1 and l2 are identical, so using 'is' in this case tests True.

'is' will be true of the objects tested have the same address in memory.

On Thu, May 1, 2008 at 4:10 AM, Gary Herron <gherron at islandtraining.com>
wrote:

> Good Z wrote:
>
> > Hello,
> > I am having problem in using is. Here is what i am doing.
> >
>
> Short answer:  Use == for equality.    Don't use "is".  Ever!  (Especially
> if you are a newbie.)
>
> Longer answer:  In a dozen years of programming Python, the only time I
> use "is" is when testing for something like  if x is None
> but, even then
>  if x == None
> works just as well, and in any case, there is usually a better way.  (See
> below.)
>
> Don't use "is" until you can explain the following
> >>> 11 is 10+1
> True
> >>> 100001 is 100000+1
> False
>
>
>
> > x=''
> > if x is None or x is '':
> >        return 1
> >
>
> Both None and an empty string (and empty lists, empty dictionaries, empty
> sets, and numeric values of 0 and 0.0) all evaluate a False in an if
> statement, so the above if statement can be written as
>
>  if not x:
>     return 1
>
> If you have to test for None, just do
>  if not x:
>
> If you have to differentiate between a value of None and something that
> evaluates to False (e.g., and empty list) then do
>  if x is None:
>   # handle None explicitly
>  elif not x:
>   # handle empty list
>
>
> > The above statement does not return value 1.
> >
> > If i changed the above check to
> > if x == None or x == '':
> >        return 1
> > Now it works fine.
> >
> > Any idea. What is happening here. I am using python 2.4.4 on ubuntu.
> >
> > Mike
> >
> > ------------------------------------------------------------------------
> > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try
> > it now. <
> > http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20>
> >
> > ------------------------------------------------------------------------
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From tjreedy at udel.edu  Fri May  9 16:17:25 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 16:17:25 -0400
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <g02bgi$oes$1@ger.gmane.org>


"grbgooglefan" <ganeshborse at gmail.com> wrote in message 
news:fcdd681d-7786-4a09-8ba6-a2865352dfa1 at k10g2000prm.googlegroups.com...
|I am creating functions, the return result of which I am using to make
| decisions in combined expressions.
| In some expressions, I would like to inverse the return result of
| function.
|
| E.g. function contains(source,search) will return true if "search"
| string is found in source string.
| I want to make reverse of this by putting it as:
| if ( ! contains(s1,s2) ):
|     return 1
|
| I found that "!" is not accepted by Python & compile fails with
| "invalid syntax".
| Corresponding to this Boolean Operator we've "not" in Python.
|
| How can I make "not" as "!"?

1. Download, edit, and compile Python source code.
Perhaps substituting '!' for 'not' in the grammar file will suffice.
I do not *think* that this would conflict with '!=' digraph.
2. Realize that code for your custom Python will not work anywhere else if 
it does contain '!' with that meaning.





From kyosohma at gmail.com  Mon May  5 09:06:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 5 May 2008 06:06:32 -0700 (PDT)
Subject: Where are Tkinter event.type constants defined?
References: <4a428d7d-1ec9-4383-a543-98bd725cfbb1@d19g2000prm.googlegroups.com>
Message-ID: <2aa25b13-4790-4ca6-989c-069341b995e7@y38g2000hsy.googlegroups.com>

On May 4, 7:22?pm, Noah <n... at noah.org> wrote:
> I'm trying to match against Event.type for KeyPress and ButtonPress.
> Currently I'm using integer constants (2 and 4). Are these constants
> defined anywhere? The docs talk about KeyPress and ButtonPress, but I
> don't see them in any of the Tkinter source files. Are these just
> magic values that come out of the TK side of things and are not
> defined in Python? Code like this makes me think I'm doing something
> wrong:
>
> ? ? if event.type == 2:
> ? ? ? ? handle_key_press (event.char)
> ? ? elif event.type == 4:
> ? ? ? ? do_something_for_button ()
> ? ? else:
> ? ? ? ? pass # unknown event
>
> (I understand that usually you would bind these function so that they
> are called as a callback.)
>
> I don't mind defining the constants myself. I just want to make sure
> that I'm not missing something already done for me. Does anyone happen
> to have a complete list of Event.type constants?
>
> --
> Noah

Hey Noah,

I recommend checking out Lundh's site (effbot) since he has lots of
information on Tkinter there. Here's his Tkinter event page:

http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm

And there's this (less helpful):

http://docs.python.org/lib/node699.html

There's a whole chapter on events Grayson's Tkinter book, but I'm not
seeing constants defined. I think they might vary somewhat across
platforms anyway...but hopefully someone else more knowledgeable will
come along and address that.

Mike


From jcd at sdf.lonestar.org  Wed May 14 16:48:47 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Wed, 14 May 2008 16:48:47 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
	<482a190b@news.mel.dft.com.au>
	<654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>
Message-ID: <1210798127.6361.16.camel@aalcdl07.lib.unc.edu>

On Wed, 2008-05-14 at 13:27 -0700, bruno.desthuilliers at gmail.com wrote:
> On 14 mai, 00:41, John Machin <sjmac... at lexicon.net> wrote:
> (snip)
> > IIRC the idea was so that managers could write programs in English. It
> > failed because nobody could write a parser that would handle something
> > like "The bottom line is that the stakeholder group requires the
> > situation going forward to be such as to facilitate the variable known
> > as x to provide the same outcome when stimulated by dereferencing as the
> > variable known as y".
> 
> John, I usually don't agree much with both what you say and how you
> say it, but I must admit that this one is, well... just brillant !-)
> 
> (IOW: rofl, keyboard, and +1 QOTW)
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Agreed.  Best.  Synonym.  EVAR.  

(I won't give away the fun by saying what it's a synonym for)

Cheers,
Cliff




From timr at probo.com  Sat May 31 16:21:57 2008
From: timr at probo.com (Tim Roberts)
Date: Sat, 31 May 2008 20:21:57 GMT
Subject: Using PEFile to replace Images in PE EXE
References: <46f79833-5ecb-4d20-91dd-25f9d0fc4a14@y38g2000hsy.googlegroups.com>
Message-ID: <jnc3445ihhs8f1ratjlh6jtrg722ure7la@4ax.com>

GeoffreyF67 <GMan67 at pduck.com> wrote:
>
>I am trying to script some image changes for multiple EXE files in
>linux.
>
>The problem I'm running across is that I haven't been able to find
>anything out there that can do this...until now.
>
>It *looks* like pefile (available at google code) would do the trick.

It would if Linux executables were PE files.  They aren't.  The usual Linux
executable format is called ELF.

What do you think you are going to do to these executable files?  I can
think of darned few legitimate reasons to modify an executable.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From christophberendes at gmail.com  Thu May  1 12:45:34 2008
From: christophberendes at gmail.com (chrisber)
Date: Thu, 1 May 2008 09:45:34 -0700 (PDT)
Subject: my module and unittest contend over commandline options...
Message-ID: <97e46ea5-0466-44d8-bf67-b73351e34d9a@d1g2000hsg.googlegroups.com>

using the unittest module in Python 2.3.5, I've written some test code
that ends up with

if __name__ == "__main__":
    unittest.main()

Since I want to run this code in various environments, I'd initially
added some commandline options, e.g. to specify a configuration file
like so

     test.py -c devtest.conf
or
     test.py -c localtest.conf

etc.
However, unittest also looks for options on the commandline, and it
was complaining about unrecognized options and quitting.

I've poked around to see if I could delete the options my earlier code
consumed from the commandline buffer, before invoking unittest, but
that seems klugy. Instead, I hardwired  in a testing config file name,
that always has to be local. That works pretty well, but it leaves me
wonderfing whether there would have been another clean way to allow
both my test code and unittest to have options without interfering
with one another.


From deets at nospam.web.de  Wed May 28 17:24:45 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:24:45 +0200
Subject: Threads and import
In-Reply-To: <b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
Message-ID: <6a60t2F35v9uuU1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> On May 28, 8:52 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> rsoh.woodho... at googlemail.com schrieb:
>>
>>
>>
>>> On May 28, 8:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>>> rsoh.woodho... at googlemail.com schrieb:
>>>>> Hi,
>>>>> I'm trying to work out some strange (to me) behaviour that I see when
>>>>> running a python script in two different ways (I've inherited some
>>>>> code that needs to be maintained and integrated with another lump of
>>>>> code). The sample script is:
>>>>> # Sample script, simply create a new thread and run a
>>>>> # regular expression match in it.
>>>>> import re
>>>>> import threading
>>>>> class TestThread(threading.Thread):
>>>>>     def run(self):
>>>>>         print('start')
>>>>>         try:
>>>>>             re.search('mmm', 'mmmm')
>>>>>         except Exception, e:
>>>>>             print e
>>>>>         print('finish')
>>>>> tmpThread = TestThread()
>>>>> tmpThread.start()
>>>>> tmpThread.join()
>>>>> import time
>>>>> for i in range(10):
>>>>>     time.sleep(0.5)
>>>>>     print i
>>>>> # end of sample script
>>>>> Now if I run this using:
>>>>> $ python ThreadTest.py
>>>>> then it behaves as expected, ie an output like:
>>>>> start
>>>>> finish
>>>>> 0
>>>>> 1
>>>>> 2
>>>>> ...
>>>>> But if I run it as follows (how the inherited code was started):
>>>>> $ python -c "import TestThread"
>>>>> then I just get:
>>>>> start
>>>>> I know how to get around the problem but could someone with more
>>>>> knowledge of how python works explain why this is the case?
>>>> Works for me. And I don't see any reason why it shouldn't for you -
>>>> unless you didn't show us the actual code.
>>>> Diez
>>> Strange. That is the code exactly as I run it using python 2.4.4 2.5.1
>>> on Ubuntu 7.10. Which version of python/what platform were you using?
>> mac-dir:/tmp deets$ python
>> Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)
>> [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>> Welcome to rlcompleter2 0.96
>> for nice experiences hit <tab> multiple times
>>  >>>
>>
>> But I doubt this changes anything.
>>
>> Diez
> 
> Hmm. Just tested it again on OS X Python 2.4.4 and custom build of
> Python 2.4.5 on Debian and get the same results as I had before.

Are you sure that ThreadTest isn't a somewhere else installed module? 
youc can use python -v to check where python gets it's files.

and how about you attach/paste the full script somewhere?

Diez


From bignose+hates-spam at benfinney.id.au  Fri May 16 19:53:28 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 17 May 2008 09:53:28 +1000
Subject: Get all the instances of one class
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <87d4nlst53.fsf@benfinney.id.au>

Terry <terry.yinzhe at gmail.com> writes:

> Is there a simple way to get all the instances of one class?

Define "all". All the instances in the current scope?

Perhaps more pertinent: What problem are you trying to address?

-- 
 \         ?We demand rigidly defined areas of doubt and uncertainty!? |
  `\            ?Vroomfondel, _The Hitch-Hiker's Guide To The Galaxy_, |
_o__)                                                    Douglas Adams |
Ben Finney


From frank at niessink.com  Sun May 11 11:27:26 2008
From: frank at niessink.com (Frank Niessink)
Date: Sun, 11 May 2008 17:27:26 +0200
Subject: Problem with custom events in wxpython
In-Reply-To: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
Message-ID: <67dd1f930805110827h2631efecl3f49744a2eb5de0d@mail.gmail.com>

Hi Jimmy,

2008/5/11 Jimmy <mcknight0219 at gmail.com>:
> hi, all
>
> I'm having a problem with creating custom events in wxpython.
>
> I have a class A handling some data processing work and another class
> B of GUI matter. I need GUI to display information when data in A is
> updated.
> I know cutom events in wxpython may work.

You may want to look at the pubsub module. Available as wx.lib.pubsub
in wxPython: http://www.wxpython.org/docs/api/wx.lib.pubsub-module.html,
and also available separately on PyPI:
http://pypi.python.org/pypi/PyPubSub/

Cheers, Frank


From castironpi at gmail.com  Fri May  9 04:11:02 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 01:11:02 -0700 (PDT)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<mailman.845.1210314217.12834.python-list@python.org>
Message-ID: <c461d7dd-61d6-4a7d-9ae9-227afdae32a7@s50g2000hsb.googlegroups.com>

On May 9, 1:23?am, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Wed, May 7, 2008 at 5:29 PM, Yves Dorfsman <y... at zioup.com> wrote:
> > Is there a way to do:
> > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> > x[0,2:6]
>
> > That would return:
> > [0, 3, 4, 5, 6]
>
> > I am surprised this notation is not supported, it seems intuitive.
> > A concrete example of the sort of thing I want to do:
>
> > p = file('/etc/passwd').readlines()
> > q = [ e.strip().split(':')[0,2:] for e in p ]
>
> > (getting rid of the password / x field)
>
> Have a look at the itemgetter function from the operator module.
>
> g = itemgetter( 0, *range(2, 6) )
> p = file("/etc/passwd").readlines()
> q = [ g( e.strip().split(':') ) for e in p ]

The only thing is, is there is another natural meaning to [a,b:c].

Counting grids on the diagonals, the rational set is well defined:

0: 0, 0
1: 1, 0
2: 0, 1
3: 2, 0
4: 1, 1
5: 0, 2
6: 3, 0
7: 2, 1
...

Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined.  Thencefore,

a,b:c,d

is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].


From marek.rocki at wp.pl  Wed May 21 12:32:57 2008
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: Wed, 21 May 2008 09:32:57 -0700 (PDT)
Subject: [ctypes] convert pointer to string?
References: <mailman.1427.1211384826.12834.python-list@python.org>
Message-ID: <5349ef25-2900-4706-b6ab-f293da263eb9@m3g2000hsc.googlegroups.com>

Neal Becker napisa?(a):
> In an earlier post, I was interested in passing a pointer to a structure to
> fcntl.ioctl.
>
> This works:
>
> c = create_string_buffer (...)
> args = struct.pack("iP", len(c), cast (pointer (c), c_void_p).value)
> err = fcntl.ioctl(eos_fd, request, args)
>
> Now to do the same with ctypes, I have one problem.
>
> class eos_dl_args_t (Structure):
>     _fields_ = [("length", c_ulong),
>                 ("data", c_void_p)]
> ...
> args = eos_dl_args_t()
> args_p = cast(pointer(args), c_void_ptr).value
> fcntl.ioctl(fd, request, args_p)  <<< May fail here
>
> That last may fail, because .value creates a long int, and ioctl needs a
> string.
>
> How can I convert my ctypes structure to a string?  It _cannot_ be a c-style
> 0-terminate string, because the structure may contain '0' values.

Hello. I'm not completely sure what your problem is ("may fail" is not
a good description. Does it fail or does it not?). If you want a
pointer to a structure as the third argument to ioctl, this would be
imho the easiest way to do it with ctypes:

> class eos_dl_args_t(Structure):
>     _fields_ = [("length", c_ulong), ("data", c_void_p)]
> args = eos_dl_args_t()
> fcntl.ioctl(fd, request, byref(args))

Regards,
Marek


From nospam at nospam.com  Mon May 26 09:57:05 2008
From: nospam at nospam.com (Gilles Ganault)
Date: Mon, 26 May 2008 15:57:05 +0200
Subject: Recommended way to POST with cookies?
References: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>
	<mailman.1147.1210838878.12834.python-list@python.org>
Message-ID: <9dgl34p2rva1gtucasg91se6vud95ihpgm@4ax.com>

On Thu, 15 May 2008 10:07:47 +0200, Laszlo Nagy <gandalf at shopzeus.com>
wrote:
>I just posted a recipe that you can try:
>
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/572202

Thanks!


From vdv100 at gmail.com  Sun May  4 10:25:21 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 15:25:21 +0100
Subject: Image grab in Python
Message-ID: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>

Hi,

anyone know a Python library to grab the size of a selected image region
(the selection will be made with the mouse), that work in Linux ?

I found a module to do that in the PIL library but only work in Windows -
http://www.pythonware.com/library/pil/handbook/imagegrab.htm

Thanks in advance.

Best regards,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org
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From gherron at islandtraining.com  Tue May 20 11:28:41 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 20 May 2008 08:28:41 -0700
Subject: Help with character encodings
In-Reply-To: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
Message-ID: <4832EE29.5020700@islandtraining.com>

A_H wrote:
> Help!
>
> I've scraped a PDF file for text and all the minus signs come back as
> u'\xad'.
>
> Is there any easy way I can change them all to plain old ASCII '-' ???
>
> str.replace complained about a missing codec.
>
>
>
> Hints?
>   

Encoding it into a 'latin1' encoded string seems to work:

  >>> print u'\xad'.encode('latin1')
  -




>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From bignose+hates-spam at benfinney.id.au  Mon May 12 01:20:29 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 15:20:29 +1000
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net>
Message-ID: <87od7c6qua.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Ben Finney wrote:
> 
> > John Salerno <johnjsal at gmailNOSPAM.com> writes:
> >
> >> num = 33
> >> 
> >> for x in xrange(10):
> >>     print num += 1
> >
> > Which is better done by 'num += 10'.
> >
> > Can you come up with an example that isn't trivially replaced with
> > clearer code? That might make it clearer what your concern is.
> 
> ::sigh:: No, unfortunately I don't have a strong enough grasp of
> Python to give a really in-depth example.

It need not be in-depth, merely illustrative of the problem being
addressed.

> I understand what you're asking though. Perhaps people don't use
> this idiom as much as I think they do, so to give a trivial example
> to support my point isn't helpful.

I think that the idiom

    for unused in xrange(10):
        # do stuff with no reference to 'unused'

is quite common. Is that what you're asking about?

> As far as I know, though, I think this is used often enough, so I
> thought I'd just ask if there are purists out there who don't like
> this use of the loop and feel it's an abuse of the syntax.

No, it seems quite a normal usage of the syntax and a good use of an
iterator.

With "do something N times", there must be *something* to keep track
of which iteration we're up to (or, equivalently, how many iterations
remain) at a given moment. A Python iterator seems a fine choice to
hold that information, and better than many alternatives.

-- 
 \     "My house is on the median strip of a highway. You don't really |
  `\    notice, except I have to leave the driveway doing 60 MPH."  -- |
_o__)                                                    Steven Wright |
Ben Finney


From skunkwerk at gmail.com  Sun May  4 23:33:12 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Sun, 4 May 2008 20:33:12 -0700 (PDT)
Subject: logger output
Message-ID: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>

i'm redirecting the stdout & stderr of my python program to a log.
Tests i've done on a simple program with print statements, etc. work
fine.  however, in my actual program i get weird output like this:

2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
if any
2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
from queue, if any
2008-05-04 20:20:44,790 DEBUG
DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any

followed by:
2008-05-04 20:20:44,815 DEBUG DEBUG:doit:Traceback (most recent call
last):
2008-05-04 20:20:44,815 DEBUG DEBUG:doit:DEBUG:doit:Traceback (most
recent call last):
2008-05-04 20:20:44,815 DEBUG
DEBUG:doit:DEBUG:doit:DEBUG:doit:Traceback (most recent call last):

the code I'm using for the log stuff:

import logging
logger = logging.getLogger('doit')
hdlr = logging.FileHandler('/home/imran/doit.log')
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
hdlr.setFormatter(formatter)
logger.addHandler(hdlr)
logger.setLevel(logging.DEBUG)

class write2Log:
	def write(self, x):
		if x!='\n':
			logger.debug(str(x))

sys.stdout = write2Log()
sys.stderr= write2Log()

any ideas what might be causing the problems?  some of the messages
being output are quite long - might this be a problem?

thanks


From hdante at gmail.com  Mon May 19 21:17:46 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:17:46 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<a2604bf2-5e94-48ed-9e31-27c4ee55ba22@l64g2000hse.googlegroups.com>
	<92857241-ef7c-482f-a7cb-8ee81edd8317@e53g2000hsa.googlegroups.com>
Message-ID: <cf8a878f-ea3c-4dec-8771-0aaa74b68ed3@a23g2000hsc.googlegroups.com>

On May 19, 5:46?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 19 mai, 17:53, Henrique Dante de Almeida <hda... at gmail.com> wrote:
>
> (snip)
>
> > ?Yes, I was actually referring to statically typed JIT-compiled
> > languages. Sorry about that, blame the beers that entered my digestive
> > system that night. :-P
>
> for beer in beers:
> ? if beer.entered_henrique_digestive_system_last_night:
> ? ? beer.blame()
>
> !-)

 ???

 beers += [Beer.random()]


From gagsl-py2 at yahoo.com.ar  Tue May 20 12:10:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 13:10:46 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>
Message-ID: <op.ubgm78f6x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 May 2008 10:54:05 -0300, Agustin Villena  
<agustin.villena at gmail.com> escribi?:
> On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> Agustin Villena schrieb:
>>
>> > is there anyway to show the class of amethodin an exception's
>> > traceback?
>> > I want to improve the line
>> > File "G:\dev\exceptions\sample.py", line 3, in foo
>> > to
>> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>
>> It should be. You can get a dictionary of the locals of an exception
>> stack frame, of which you could extract the self-parameter's class.
>
> I digged on sys.exc_info() object and the traceback module and I
> could't figure how I can get the locals() of the exception stackframe

Put this function in traceback.py, and replace the lines
         name = co.co_name
with
         name = guess_full_method_name(f)
everywhere.
Please read the docstring!!!

def guess_full_method_name(frame):
     """Guess classname.methodname for a given frame.

     Only a guess!
     Assumes the frame belongs to an instancemethod
     whose first argument is "self", or a classmethod
     whose first argument is "cls".
     Doesn't handle correctly any other situation.
     Returns the class name of the object on which
     the method was called, not the class where
     the method was actually defined.
     """
     cls_name = None
     fun_name = frame.f_code.co_name
     self = frame.f_locals.get('self', None)
     if self is None:
         cls = frame.f_locals.get('cls', None)
     else:
         cls = getattr(self, '__class__', None)
     if cls is not None:
         cls_name = getattr(cls, '__name__', None)
         if cls_name is not None:
             return '%s.%s' % (cls_name, fun_name)
     return fun_name

-- 
Gabriel Genellina



From pscott at uwc.ac.za  Mon May  5 10:21:53 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:21:53 +0200
Subject: Nested os.path.join()'s
Message-ID: <1209997313.7106.29.camel@paul-laptop>


Today, I needed to concatenate a bunch of directory paths and files
together based on user input to create file paths. I achieved this
through nested os.path.join()'s which I am unsure if this is a good
thing or not.

example:

if os.path.exists(os.path.join(basedir,picdir)) == True :
    blah blah

Question is, is there a better way of doing this? The above *works* but
it looks kinda hackish...

--Paul

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From afrobeard at gmail.com  Thu May 15 19:07:04 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:07:04 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
Message-ID: <1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>

The following proposed solution is not intended to be a solution, it
goes completely against the zen of python. [Type import this into the
python command interpreter]

I brought it down to two lines:-

l = range(6)
[1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]

itertools would still be a better approach in my opinion.

Just because I'm curious to know, can anyone bring it shorter[even if
its cryptic] than this without invoking any Python Library.

P.S. Once again I would not recommend using this as Explicit is better
than Implicit
P.P.S. It is strongly undesirable for us humans to use anything
starting with __ :)


On May 15, 5:10?pm, "Geoffrey Clements"
<geoffrey.clement... at SPAMbaesystems.com> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > | It seems that I rather frequently need a list or iterator of the form
> > | [x for x in <> while <>]
>
> > I can think of two ways to interpret that.
> >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> >> the expression <B> is false.
>
> def gen(a):
> ? ? for x in a:
> ? ? ? ? if B: break
> ? ? ? ? yield x
>
> a_gen = gen(A)
>
> # now iterate over a_gen
>
> --
> Geoff



From nick at craig-wood.com  Mon May  5 13:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 05 May 2008 12:30:03 -0500
Subject: get the pid of a process with pexpect
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
Message-ID: <slrng1uf67.nr7.nick@irishsea.home.craig-wood.com>

Karim Bernardet <bernardet at cppm.in2p3.fr> wrote:
>  Hi
> 
>  I am using pexpect to do ssh tunneling and to open a vnc server (jobs on 
>  a grid cluster). When the job is canceled, these 2 processes remain on 
>  the worker node (they are detached), so I have to kill them (using a 
>  trap command in the bash script of the job) but I need the pid of each 
>  process. I have tried to get it like this
> 
>  ssh_tunnel = pexpect.spawn (tunnel_command % globals())
>  ...
>  print ssh_tunnel.pid
> 
>  but ssh_tunnel is not the pid of the ssh tunnel
> 
>  Is there a way to get it using pexpect ?

If I understand you correctly what you need to do is run "echo $$" on
the remote shell then "exec tunnel_command".  The $$ will print the
pid and the exec will run tunnel_command without changing the pid.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From inhahe at gmail.com  Fri May 23 15:35:27 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:35:27 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net>
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
	<69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>
Message-ID: <p%EZj.19189$255.2014@bignews8.bellsouth.net>

"
I wish this worked:
>>> def main(a,b,*argv): pass
>>> options['argv'] = argv
>>> main(**options)
TypeError: main() got an unexpected keyword argument 'argv'
"
-----
I was thinking about that exact same thing actually.  Except that I was 
thinking you might want it like this, otherwise it could be ambiguous:

>>> def main(a,b,*argv): pass
>>> options['*argv'] = argv
>>> main(**options)

Weird I know, to put the * operator inside the string.  I suppose the 
necessity of doing that just shows why it wasn't implemented in the first 
place.  But still, it would be neat...

Also, of course, you could then do
main(*argv=[2,3])

or rather

main(*argv=[3,4],a=1,b=2) #in random order









From mcknight0219 at gmail.com  Fri May 23 11:27:06 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 23 May 2008 08:27:06 -0700 (PDT)
Subject: can python do some kernel stuff?
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<8d1f0f0f-8dc4-43df-bbc5-78c05b81d6ca@u12g2000prd.googlegroups.com>
Message-ID: <3ba0233a-0ed4-4057-bc9c-7e1940968d92@d19g2000prm.googlegroups.com>

On May 23, 11:14 pm, Jimmy <mcknight0... at gmail.com> wrote:
> On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > Jimmy schrieb:
>
> > > On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> > >> Jimmy wrote:
> > >>> Hi to all
> > >>> python now has grown to a versatile language that can
> > >>> accomplish tasks for many different purposes. However,
> > >>> AFAIK, little is known about its ability of kernel coding.
> > >>> So I am wondering if python can do some kernel coding that
> > >>> used to be the private garden of C/C++. For example, can python
> > >>> intercept the input of keyboard on a system level? someone told me
> > >>> it's a kernel thing, isn't it?
> > >>http://wiki.python.org/moin/elmer
>
> > > well, straightly speaking, how can I know a key is pressed on a system-
> > > level if
> > > using python?
>
> > What has that todo with kernel programming? You can use e.g. pygame to
> > get keystrokes. Or under linux, read (if you are root) the keyboard
> > input file - I've done that to support several keyboards attached to a
> > machine.
>
> > And the original question: no, python can't be used as kernel
> > programming language. Amongst other reasons, performance & the GIL
> > prevent that.
>
> > Diez
>
> sorry, my aim is not limited to one particular program. Yes, many
> library can
> permit you to respond to keyboard event, however, what I want is a
> universal
> function. as long as a key is pressed, no matter where, my program can
> repond.
>
> I am quite strange with this topic. But according to my understanding,
> any event, keyboard event
> for example, once triggered, will be dilivered by keyboard driver to X
> system, and then
> any running program can either choose to respond or ignore. So my
> question can be translated to:
> how to make my program respond ?

maybe I'd better elaborate on my question. Back to my original
question:
intercept keyboard event on a system level. If you are writing program
in
 emacs, of course, the keyboard inputs are meant for emacs only. What
I
want is no matter what program you're running, keyboard events can be
anyway caught by my program.

Am I clear with myself? :)


From deets at nospam.web.de  Mon May 26 06:02:05 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 12:02:05 +0200
Subject: CGI question
References: <bd4f3272-0f3c-44cd-9786-f80ae228944f@w34g2000prm.googlegroups.com>
Message-ID: <69vg5qF34vemeU1@mid.uni-berlin.de>

Rohan wrote:

> Hi
> 
> I have python-CGIs for my web application running on apache 2.
> Few of the CGIs run for a long time.
> 
> When such a CGI is running and user presses "Stop" button of browser
> (or connection is aborted) how can I identify such situation and
> terminate
> the CGI.
> I don't want the CGI to complete the processing and terminate when it
> tries to write to client pipe.
> It would be good to terminate it as soon as client connection is
> aborted.
> 
> How can I achieve this?

The only way I can think of is to regularly output something inside the CGI,
and thus make it fail in the very moment the pipe is closed.

But I didn't try that myself - and if it doesn't work I don't think you
stand a chance, because that's the way sockets work - there is no
signalization beyond that, and even if it were it's not propagated across
CGI.

Diez


From notnorwegian at yahoo.se  Fri May 23 12:42:57 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 09:42:57 -0700 (PDT)
Subject: webspider, regexp not working, why?
Message-ID: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>

url = re.compile(r"^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]
{1}
([\w\-]+\.)+
([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+\.[\w]{3,4})?((\?\w+=\w+)?
(&
\w+=\w+)*)?")

why isnt this url catching something like:

<link rel="alternate" type="application/rss+xml" title="Python
Screencasts"
        href="http://www.showmedo.com/latestVideoFeed/rss2.0?
tag=python" />

site = urllib.urlopen("http://www.python.org")
for row in site:
    obj = url.search(row)
    if obj != None:
        print "url: ", obj.group()

i know it works because it can catch
www.hello.com in a txt-file and i can catch emails of websites with
another regexp.

search and match yields the same results.

but when you put something like href= in front of it it doesnt work.

i see now that it has to match the beginning of the row or something,
because:
hi www.google.com
doesnt match but
www.google.com  hi
matches.


i though a regexp would search a row/file and when it finds an
occurence report it, so a regexp of "lo" would match in lopez.


From cwitts at gmail.com  Tue May 27 04:54:46 2008
From: cwitts at gmail.com (Chris)
Date: Tue, 27 May 2008 01:54:46 -0700 (PDT)
Subject: python raycaster, pycaster, where?
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
	<mailman.1627.1211837219.12834.python-list@python.org>
	<0a414718-cf1b-40fd-8abb-8c4a3e51c743@8g2000hse.googlegroups.com>
Message-ID: <b6b937de-bcc2-4dcf-9cf3-4f11b4b5c782@b1g2000hsg.googlegroups.com>

On May 27, 3:03?am, notnorweg... at yahoo.se wrote:
> On 26 Maj, 23:26, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Mon, May 26, 2008 at 4:52 PM, ?<notnorweg... at yahoo.se> wrote:
> > > i tried googling this thing but couldnt find it. i cant find it in
> > > pyagme either.
>
> > Really?
>
> >http://www.google.com/search?q=pycaster
>
> > The first link has downloads for it.
>
> quite funny, the first post returns this posted on another forum ...
> and then the same links again.
>
> clicking any of the links that dont lead here ar eeither outdated or
> broken.

http://www.google.com/codesearch?q=package%3Apycaster&hl=en&btnG=Search+Code


From znfmail-pythonlang at yahoo.com  Wed May 14 14:35:25 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Wed, 14 May 2008 14:35:25 -0400
Subject: addendum Re: working with images (PIL ?)
Message-ID: <g0fbdf$jp$1@aioe.org>

I've put together some code to demonstrate what my goal is though looping 
pixel by pixel it's rather slow.

import Image

def check_whitespace():
    im = Image.open("\\\\server\\vol\\temp\\image.jpg")

    size = im.size

    i = 0
    whitePixCount = 0
    while i in range(size[1]):
        j = 0
        while j in range(size[0]):
            p1 = im.getpixel((j,i))
            if p1 == (255, 255, 255):
                whitePixCount = whitePixCount + 1
                if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
1404) / 4) 25%
                    return "image no good"
            j = j + 1
        i = i + 1

    print whitePixCount

    return "image is good"

print check_whitespace()


"Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>I need to write a program to examine images (JPG) and determine how much 
>area is whitespace. We need to throw a returned image out if too much of it 
>is whitespace from the dataset we're working with. I've been examining the 
>Python Image Library and can not determine if it offers the needed 
>functionality. Does anyone have suggestions of other image libraries I 
>should be looking at it, or if PIL can do what I need?
> 




From bronger at physik.rwth-aachen.de  Sat May  3 02:19:23 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 03 May 2008 08:19:23 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
Message-ID: <87lk2rsydw.fsf@physik.rwth-aachen.de>

Hall?chen!

Gabriel Genellina writes:

> [...]
>
> I can't believe some angry responses in this thread - it's just a
> technical question, not about which is the best team in the
> [preferred sports here] National Championship...

Well, Python-list is tunnelled to Usenet.  Welcome here.  ;-)

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From george.sakkis at gmail.com  Thu May 15 02:56:48 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 23:56:48 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<02de1dee-8416-47a8-8195-e344cae6d31f@k37g2000hsf.googlegroups.com>
Message-ID: <cafb7389-0bf9-4b56-a3d9-0dea1cf98fea@27g2000hsf.googlegroups.com>

On May 14, 4:38?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 14 mai, 16:30, George Sakkis <george.sak... at gmail.com> wrote:
>
> > On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > > An instance method works on the instance
> > > > A Static method is basically a function nested within a class object
> > > > A class method is overkill?
>
> > > If anything, a static method is overkill. See it this way: *if* you for some
> > > reason put a method into an enclosing context - isn't it worth having a
> > > reference to that?
>
> > My feeling exactly; these days I almost always use class methods
> > instead of static. I vaguely remember seeing somewhere an example
> > where a static method was the only (elegant) solution; neither a class
> > method nor a plain function would do. I'll post it if I find it unless
> > someone beats me to it.
>
> No concrete example here but I surely remember having used
> staticmethods in one case where I needed class-based polymorphic
> dispatch and eventually implementation inheritance (to get a default
> implementation) ?for something that didn't required access to the
> class object.

Yes, that's common, but a class method could be used just as well
here. I couldn't find the original example but IIRC it was related to
monkeypatching. Say that you have a package P1 that has some useful
classes:

    class A(object): pass
    class B(A): pass
    class C(A): pass

You also have an unrelated package P2 with some useful functions:

    def f1(): return 0
    def f2(): return 1

Naturally you want to combine these two. One common pattern when doing
so turns out to be like:

    # e.g. x = random.choice([A(), B(), C()])
    ...
    assert isinstance(x, A)
    if type(x) in (A,B):
        print f1()
    elif type(x) is C:
        print f2()

With a less trivial hierarchy and number of functions, it becomes
clear that it would help a lot if you could refactor it somehow so you
can just say "print x.f()" and it would do the right thing.
Monkeypatching it as a normal method ("A.f = f1; C.f = f2") doesn't
work because it expects self as the first argument, and similarly for
class methods and the cls argument. OTOH static methods do the trick:

    A.f = staticmethod(f1)
    C.f = staticmethod(f2)
    print x.f()

Admittedly it's not a common scenario but it's good to know it's there
if you need it.

George


From cokofreedom at gmail.com  Tue May  6 11:24:59 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 08:24:59 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <8f5d04d8-2ece-4e8b-9af9-eefec153d7bd@34g2000hsh.googlegroups.com>

On May 6, 5:20 pm, krumbleb... at gmail.com wrote:
> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.
>
> I know how to reverse a list (with the reverse method - very handy),
> but it doesn't seem possible to reverse a dict.
>
> I suspect what I need to do is somehow go from:
>
> thelist=list(thedict)
> thelist.reverse()
> thedict=dict(thelist)
>
> Does anyone know how to convert / or reverse a dict?
>
> thanks
>
> kb.

Issue 1: A dictionary is not ordered so cannot be reversed, as is.

Saw something like this though:

info = {"PHP":"17th May",
       "Perl":"15th June",
       "Java":"7th June",
       "Python":"26th May",
       "Tcl":"12th July",
       "MySQL":"24th May"}

topics = info.keys()
topics.sort()
topics.reverse()

for topic in topics:
   print "Next",topic,"course starts",info[topic]


From schickb at gmail.com  Mon May 12 20:35:44 2008
From: schickb at gmail.com (schickb)
Date: Mon, 12 May 2008 17:35:44 -0700 (PDT)
Subject: Popen pipe hang
Message-ID: <64cf0966-5e39-473c-8923-7a81ff99f905@u6g2000prc.googlegroups.com>

I'm trying to pipe data that starts life in an array('B') object
through several processes. The code below is a simplified example. The
data makes it through, but the wait() always hangs. Is there a better
way to indicate src.stdin has reach EOF?

from subprocess import Popen, PIPE
from array import array

arr = array('B')
arr.fromstring("hello\n")

src = Popen( ["cat"], stdin=PIPE, stdout=PIPE)
dst = Popen( ["cat"], stdin=src.stdout)
arr.tofile(src.stdin)
src.stdin.close()
dst.wait()


From mcknight0219 at gmail.com  Thu May 15 09:28:16 2008
From: mcknight0219 at gmail.com (Jimmy)
Date: Thu, 15 May 2008 06:28:16 -0700 (PDT)
Subject: create window on panel
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>
	<mailman.1153.1210845280.12834.python-list@python.org>
	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
	<mailman.1158.1210851928.12834.python-list@python.org>
Message-ID: <70da959d-dfce-4355-8279-2b33123db568@w5g2000prd.googlegroups.com>

On May 15, 7:45 pm, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > Thanks for your reply!
>
> > I am using Linux+gnome. Actually, what I want is simply a text-region
> > on the panel
> > and display some dynamic information on it. Is it hard to do it ?
>
> Google is your friend! I searched for "gnome python panel" and the first
> hit was:
>
> http://www.onlamp.com/pub/a/python/2000/07/25/gnome_applet.html
>
> :-)
>
> Of course it is out of date but you can see that there is something
> called "/PyGNOME".
> /
> The package names on my Linux:
>
> python-gnome2 python-gnome2-desktop python-gnome2-extras python-gnomecanvas
>
> Description:
>
> Python bindings for the GNOME desktop environment
> This archive contains modules that allow you to write GNOME programs
> in Python. This package contains the bindings for the new version 2.0
> of that desktop environment.
>
> URL:http://www.daa.com.au/~james/software/pygtk/
> /
> /It should be easy to read the docs, view the demo programs and create
> your own program.
>
> L

thanks~ it seems attractive, however, I did not find much useful
information :(


From needin4mation at gmail.com  Tue May  6 09:44:19 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Tue, 6 May 2008 06:44:19 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
Message-ID: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>

Studying OOP and noticed that Python does not have Interfaces.  Is
that correct?  Is my schooling for nought on these OOP concepts if I
use Python.  Am I losing something if I don't use the "typical" oop
constructs found in other languages (Java, C# come to mind.)  I'm
afraid that if I never use them I'll lose them and when I need them
for something beside Python, I'll be lost.  Thank you.


From jeffober at gmail.com  Mon May  5 07:48:29 2008
From: jeffober at gmail.com (Jeff)
Date: Mon, 5 May 2008 04:48:29 -0700 (PDT)
Subject: use php in python httpservers
References: <36960658-388b-48f9-84d0-38aab3e336f0@s50g2000hsb.googlegroups.com>
Message-ID: <3b460037-46ea-4944-9dc1-516666889da2@2g2000hsn.googlegroups.com>

ctypes?


From p.newbie at yahoo.com  Mon May  5 20:55:10 2008
From: p.newbie at yahoo.com (python newbie)
Date: Mon, 5 May 2008 17:55:10 -0700 (PDT)
Subject: listing computer hard drives with python
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
Message-ID: <423526.39216.qm@web45807.mail.sp1.yahoo.com>

Sorry, I forgot to copy the list.

Looks like you are doing this on Windows.  Windows has a built in command call fsutil that would work in this situation.  The syntax would be:

C:\Documents and Settings\username>fsutil fsinfo drives

Drives: C:\ D:\ E:\

To find out the type of drive you can use:

C:\Documents and Settings\username>fsutil fsinfo drivetype c:

c: - Fixed Drive

On a side note you can call an external command via:

import os
os.system('fsutil fsinfo drives')
os.system('fsutil fsinfo drivetype c:')

I hope this helps.

PS: I am not sure about the privileges  that are required to run fsutil.

Disclaimer: I am new to python and programming.  This may not be they python way of doing things.

Pete



Ohad Frand <ohad.frand at percello.com> wrote:                        Hi
  I am looking for a way to get a list of all active logical hard drives of the computer (["c:","d:"..])
   
  Thanks,
  Ohad
  
  --
http://mail.python.org/mailman/listinfo/python-list

       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.
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From inhahe at gmail.com  Wed May 21 10:46:30 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 10:46:30 -0400
Subject: about python modules
References: <2fc55c56-7408-4f44-b6e2-64f85f341ac9@i36g2000prf.googlegroups.com>
Message-ID: <DzWYj.78104$%15.65210@bignews7.bellsouth.net>

i always just put most of my python files in the c:\python25 directory. 
including ones i want to import as modules, since they import from there. 
otherwise you can put the file in c:\python25\lib\site-packages

"srinivas" <srinivas.puvvala at gmail.com> wrote in message 
news:2fc55c56-7408-4f44-b6e2-64f85f341ac9 at i36g2000prf.googlegroups.com...
> hi friends i am new to python programming.
> i am using Python 2.5 and IDLE as editor.
> i have developed some functions in python those will be calling
> frequently in my main method .
> now i want to know how to import my functions folder to python in
> sucha way that the functions in functions folder should work like
> python library modules .
>
> i have  python in folder C:\python25\..
> and functions folder D:\programs\Functions\
>
> pls help me friends how to do that. 




From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:49:15 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:49:15 +0200
Subject: python newbie: some surprises
In-Reply-To: <VHQUj.124646$Cj7.90968@pd7urf2no>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <4824100b$0$5108$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
> Mensanator wrote:
>>> 2. python requires to pass "self" to all instance methods
>>
>> Who uses methods?
> 
> Is this a joke ?

Very probably.

> What are the alternatives ?

Err... functions ?-)



From fred.sells at adventistcare.org  Fri May 30 14:52:53 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Fri, 30 May 2008 14:52:53 -0400
Subject: PyDev multiple source files?
In-Reply-To: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0939@acesxch01.ADVENTISTCORP.NET>

the short answer is

a file is a module; therefore to 'include' access to 'myclass' in file xyz.py from another file called 'abc.py'  you would put this in abc.py

import xyz  #note no '.py'
x = xyz.myclass()
or
from xyz import myclass  #if you're lazy use ... import *
x = myclass()

see the basic tutorial on modules and importing

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of RossGK
> Sent: Friday, May 30, 2008 2:10 PM
> To: python-list at python.org
> Subject: PyDev multiple source files?
> 
> 
> Newbie questions on PyDev project setup.   Things are going fine -
> writing python code in eclipse/pydev and running them with various
> imports etc, doing wxpython stuff blah, blah, blah. My .py code is in
> a module, in a package, in a project. It runs fine.
> 
> Now I want to be able to break my single source file up into multiple
> files to segregate functions, divide up with others, etc, but I don't
> know how to configure it. I pulled one simple class definition out of
> my single source file and created a new .py file with just that in
> there. But now I'm stalled...
> 
> What is the equivalent of an 'include' statement. I assume there's
> something I put into one .py file to say I'm using stuff in another
> local .py file.   I tried using "import" but it doesn't seem to work -
> ie code doesn't know about the class in the other file.
> 
> Also, how about global vars that are needed across multiple .py files?
> Where do I declare them to be understood in all the files that use
> that global.
> 
> I suspect there is something I do in __init__.py - perhaps the
> equivalent of 'include' statements in there with all my globals
> stuffed in there too???   I'm lost here, but will continue to play
> with it.  Any hints appreciated.  Surely all python developers don't
> cram everything into one huge file (I hope).
> 
> Ross.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From basti.wiesner at gmx.net  Sun May 25 13:48:13 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 19:48:13 +0200
Subject: Pinging a machine from python
References: <b2325a37-eacf-461c-959a-6838c66bb38c@q27g2000prf.googlegroups.com>
Message-ID: <g1c8pv$hob$02$1@news.t-online.com>

[ Prasanth <prasanths89 at gmail.com> ]

> I tried pinging a machine from python using socket programming but
> could not do it. Is there any module which we can use to ping the
> machine < like net::ping in perl> or can you give me simple program.
At least on linux pinging requires raw sockets since there is no syscall for
sending ICMP packages.  Raw sockets in turn require special privileges. 
Therefore its best to use the os command _ping_, this limits the use of
priviledges to the required part and you don't have to deal with
priviledges (ping has suid bit set).

net::ping will most likely do the same.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From stevegill7 at gmail.com  Mon May 12 15:54:43 2008
From: stevegill7 at gmail.com (Jetus)
Date: Mon, 12 May 2008 12:54:43 -0700 (PDT)
Subject: downloading a link with javascript in it..
Message-ID: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>

I am able to download this page (enclosed code), but I then want to
download a pdf file that I can view in a regular browser by clicking
on the "view" link. I don't know how to automate this next part of my
script. It seems like it uses Javascript.
The line in the page source says
href="javascript:openimagewin('JCCOGetImage.jsp?
refnum=DN2007036179');" tabindex=-1>

So, in summary, when I download this page, for each record, I would
like to initiate the "view" link.
Can anyone point me in the right direction?

When the "view" link is clicked on in IE or Firefox, it returns a pdf
file, so I should be able to download it with
urllib.urlretrieve('pdffile, 'c:\temp\pdffile')

Here is the following code I have been using
----------------------------------------------------------------
    import urllib, urllib2

    params = [
                ('booktype', 'L'),
                ('book', '930'),
                ('page', ''),
                ('hidPageName', 'S3Search'),
                ('DoItButton', 'Search'),]

    data = urllib.urlencode(params)

    f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
S3DataLKUP.jsp", data)

    s = f.read()
    f.close()
    open('jcolib.html','w').write(s)



From sjmachin at lexicon.net  Thu May  1 20:22:50 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 1 May 2008 17:22:50 -0700 (PDT)
Subject: RegEx for matching brackets
References: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>
Message-ID: <972fb319-07d3-4d2b-aa4c-dc8e40af9e7e@b5g2000pri.googlegroups.com>

On May 2, 9:44 am, NevilleDNZ <neville... at gmail.com> wrote:
> Below is a (flawed) one line RegEx that checks curly brackets (from
> awk/c/python input) are being matched.  Is there a one liner for doing
> this in python?
>
> ThanX
> N
>
> re_open_close="(((\{))[^{}]*((?(0)\})))+"
> re_open_close=re.compile(re_open_close)
> tests="""
>   { this is a test  BAD
>   { this is a test } OK
>   { this is a test } { this is a test } OK
>   { this is a test } { this { this is a test } is a test } OK
>   { this is a test  { this { this is a test } is a test } missing
> close BAD
> """.splitlines()[1:]
> for test in tests:
>   if bool(re_open_close.search(test)) == bool(re.search("OK",test)):
>     print "DETECTED:",test
>   else:
>     print "MISSED:",test
> [linux]$ python ./re_matching.py
> DETECTED:   { this is a test  BAD
> DETECTED:   { this is a test } OK
> DETECTED:   { this is a test } { this is a test } OK
> DETECTED:   { this is a test } { this { this is a test } is a test }
> OK
> MISSED:   { this is a test  { this { this is a test } is a test }
> missing close BAD

Regexes can't count.

To check for balanced braces, you need to write code e.g.

# untested
def balanced_braces(s):
   n = 0
   for c in s:
      if c == '{':
         n += 1
      elif c == '}':
         n -= 1
         if n < 0:
            return False
   return n == 0

HTH,
John


From notnorwegian at yahoo.se  Sun May 25 03:00:14 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 00:00:14 -0700 (PDT)
Subject: recursion with or without return?
Message-ID: <5fe0c5e3-8063-4e84-a40a-3d1938671a80@z72g2000hsb.googlegroups.com>

when using recursion should one use a return statement or not?

there is a difference obv since with a return statement it will
ultimately return a value if not recursing forever.

but is there a guideline for this or it just taste or is it
considering good style or pythonic to always have a returnvalue?


From hyperboreean at nerdshack.com  Wed May 21 04:48:06 2008
From: hyperboreean at nerdshack.com (hyperboreean)
Date: Wed, 21 May 2008 11:48:06 +0300
Subject: scalable xml 
Message-ID: <4833E1C6.3010201@nerdshack.com>

Hi, I am writing the application server for a three-tier architecture 
and sending the client's response in xml. My question is: is there a way 
to build the xml dom in a more scalable way and faster way than just 
creating every textNode and element for it? I have tons of data to 
transmit and it drives me crazy having to build that dom manually.

I am not sure if this is a stupid question as I don't know other 
alternatives ... maybe just provide a template xml which I can fill with 
data but that can introduce some pretty ugly bugs in the application.


Thanks.



From russblau at gmail.com  Fri May  9 06:39:03 2008
From: russblau at gmail.com (Russell Blau)
Date: Fri, 9 May 2008 03:39:03 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <1fb6dbee-c9d9-4dc3-bb92-b3f5c1080c6e@25g2000hsx.googlegroups.com>

On May 9, 6:25 am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
>
> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
>
> > On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>
> > > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > > and
> > > list2 = [0, 2, 4] # integer elements
>
> > > howto (I mean most simple recipe, of course) form list3 that contains
> > > elements from list1 with indexes from list2, i.e.
>
> > list3 = [list1[i] for i in list2]
>
> > --
> > Paul Hankin

Why don't you try Paul's suggestion under Python 2.3 and see what
happens?


From inhahe at gmail.com  Wed May 21 11:15:45 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 11:15:45 -0400
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1%WYj.78116$%15.75349@bignews7.bellsouth.net>

i don't see anybody mentioning huffman encoding.  i think it just works per 
byte, so it's not as tight as gzip or whatever.  but it sounds like it would 
be easy to implement and wouldn't require any corpus-wide compression 
information. except a character frequency count if you wanted to be optimal.

<i don't know anything about compression>

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xy7658k8o.fsf_-_ at ruckus.brouhaha.com...
>I have a lot of short English strings I'd like to compress in order to
> reduce the size of a database.  That is, I'd like a compression
> function that takes a string like (for example) "George Washington"
> and returns a shorter string, with luck maybe 6 bytes or so.  One
> obvious idea is take the gzip function, compress some large text
> corpus with it in streaming mode and throw away the output (but
> setting up the internal state to model the statistics of English
> text), then put in "George Washington" and treat the additional output
> as the compressed string.  Obviously to get reasonable speed there
> would have to be a way to save the internal state after initializing
> from the corpus.
>
> Anyone know if this has been done and if there's code around for it?
> Maybe I'm better off with freezing a dynamic Markov model?  I think
> there's DMM code around but am not sure where to look.
>
> Thanks. 




From vdv100 at gmail.com  Sun May  4 13:57:28 2008
From: vdv100 at gmail.com (Valerio Valerio)
Date: Sun, 4 May 2008 18:57:28 +0100
Subject: Image grab in Python
In-Reply-To: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
	<18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>
Message-ID: <eba8281a0805041057v4f020f67ic23afef620dc5ddb@mail.gmail.com>

Hi,

2008/5/4 David <wizzardx at gmail.com>:

> On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> > I can grab the image,  I need a way of grab the region size with the
> mouse,
> > a easy way of the user select a region of the image to analyze,
> something
> > like the  "Rectangle selection tool" of gimp.
> >
>
> I assume what you want to do is allow the user to drag the mouse
> across your desktop, and your program, running in the background,
> picks this up? As opposed to the user making a rectangular selection
> entirely within your app.


What I want is display a window with a image, the user select a region of
the image, and the region value is passed to my program, my program slice
the image region, and analyze it.

I think the Xlib libraries can help in my task, thanks for the help :)

Cheers,

-- 
Val?rio Val?rio

http://www.valeriovalerio.org


>
> I think the simplest way to do this is to capture the entire screen,
> then show it as an image on a window covering the entire screen (eg:
> fullscreen mode, or a regular window without decorations).  Then
> listen for mouse events. There should be a way to show the 'rectangle
> elastic band' at the same time. Otherwise just draw a rectangle
> between where the user first clicked and where the mouse is now (until
> they release the mouse button).
>
> Another way would be to listen to all events sent through X, and act
> based on the mouse events. VNC does something similar.
>
> A good starting point would be the Python xlib libraries:
>
> http://python-xlib.sourceforge.net/
>
> David.
>
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From gnewsg at gmail.com  Fri May 16 12:49:49 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 16 May 2008 09:49:49 -0700 (PDT)
Subject: ANN: Python FTP Server library (pyftpdlib) 0.4.0 released
Message-ID: <bdda2729-3477-4a3a-b6b5-65e3b33f4b44@d1g2000hsg.googlegroups.com>

Hi,
I'm pleased to announce release 0.4.0 of Python FTP Server library
(pyftpdlib).
http://code.google.com/p/pyftpdlib/

=== About ===

Python FTP server library provides an high-level portable interface to
easily write asynchronous FTP servers with Python. Based on asyncore
framework pyftpdlib is currently the most complete RFC-959 FTP server
implementation available for Python programming language.


=== Major changes ===

This new version, aside from fixing some bugs, includes two new
features:

- IPv6 support (as described in RFC-2428).
- The possibility to assume the id of real users when using system
dependent authorizers.

A complete list of changes including enhancements, bug fixes and
instructions for using the new functionalities is available here:
http://code.google.com/p/pyftpdlib/wiki/ReleaseNotes04


=== More links: ===

* Source tarball: http://pyftpdlib.googlecode.com/files/pyftpdlib-0.4.0.tar.gz
* Online docs: http://code.google.com/p/pyftpdlib/wiki/Tutorial
* FAQs: http://code.google.com/p/pyftpdlib/wiki/FAQ
* RFCs compliance paper: http://code.google.com/p/pyftpdlib/wiki/RFCsCompliance
* Issue tracker: http://code.google.com/p/pyftpdlib/issues/list


Thanks,

-- Giampaolo Rodola' < g.rodola [at] gmail [dot] com >


From gherron at islandtraining.com  Tue May 20 11:59:55 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 20 May 2008 08:59:55 -0700
Subject: Help with character encodings
In-Reply-To: <4832EE29.5020700@islandtraining.com>
References: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>
	<4832EE29.5020700@islandtraining.com>
Message-ID: <4832F57B.2040405@islandtraining.com>

Gary Herron wrote:
> A_H wrote:
>> Help!
>>
>> I've scraped a PDF file for text and all the minus signs come back as
>> u'\xad'.
>>
>> Is there any easy way I can change them all to plain old ASCII '-' ???
>>
>> str.replace complained about a missing codec.
>>
>>
>>
>> Hints?
>>   
>
> Encoding it into a 'latin1' encoded string seems to work:
>
>  >>> print u'\xad'.encode('latin1')
>  -

That might be what you want, but really, it was not a very well thought 
answer.  Here's a better answer:



Using the unicodedata module, i see that the character you have  u'\xad' is

    SOFT HYPHEN (codepoint 173=0xad)


If you want to replace that with the more familiar HYPHEN-MINUS 
(codepoint 45) you can use the string replace, but stick will all 
unicode values so you don't provoke a conversion to an ascii encoded string

    >>> print u'ABC\xadDEF'.replace(u'\xad','-')
    ABC-DEF

But does this really solve your problem?   If there is the possibility 
for other unicode characters in your data, this is heading down the 
wrong track, and the question (which I can't answer) becomes: What are 
you going to do with the string?

If you are going to display it via a GUI that understands UTF-8, then 
encode the string as utf8 and display it -- no need to convert the 
hyphens.   

If you are trying to display it somewhere that is not unicode (or UTF-8) 
aware, then you'll have to convert it.  In that case, encoding it as 
latin1 is probably a good choice, but beware:  That does not convert the 
u'\xad' to an chr(45) (the usual HYPHEN-MINUS),  but instead to chr(173) 
which (on latin1 aware applications) will display as the usual hyphen.  
In any case, it won't be ascii (in the strict sense that ascii is chr(0) 
through chr(127)).  If you *really* *really* wanted straight strict 
ascii, replace chr(173) with chr(45).

Gary Herron






From deets at nospam.web.de  Fri May 30 12:20:25 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 18:20:25 +0200
Subject: Generating event from event
In-Reply-To: <d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
Message-ID: <6aanqgF36mnldU1@mid.uni-berlin.de>

Gandalf schrieb:
> On May 30, 3:43 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>> Gandalf wrote:
>>> I have script which being triggered by pressing CTRL+Right mouse click
>>> from any place in my O.P , Now I need to generate automatically event
>>> like copy my selected item or double clicking the right mouse cursor
>>> without user interfering.
>>> how can i implement this width python?
>>> thanks!
>> You didn't tell us enough to answer your question.  What GUI are you
>> using?  Nearly every one of them that I'm aware of allow you to register
>> handlers for such events.
>>
>> -Larry
> windows xp

Oh please. You have been around here & asking enough questions to 
finally notice that more information is needed - actually, you have been 
providing this at other times. What GUI-Toolkit are you using, on which OS?

Yes, I now *know* that it is WX - because I searched the archives. But 
that is not the thing here - provide enough information yourself.

Diez


From iainking at gmail.com  Thu May 15 04:19:45 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 15 May 2008 01:19:45 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<dullrich-A8B0BE.15375014052008@text.giganews.com>
Message-ID: <1d3dfd98-ecc3-4092-9c03-346ddf118375@i76g2000hsf.googlegroups.com>

On May 14, 9:37 pm, "David C. Ullrich" <dullr... at sprynet.com> wrote:
> In article
> <a14c2400-e88b-4d90-80bb-a5fe27fed... at m44g2000hsc.googlegroups.com>,
>  Iain King <iaink... at gmail.com> wrote:
>
> > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > up a file selector.  This all works fine, but the first thing the user
> > has to do when they open the dialog is select a file, so I would like
> > the dialog to automatically call the onBrowse function as soon as the
> > dialog opens.  However, I don't know how to do this.
>
> > dlg.ShowModal()
> > onBrowse()
>
> > obviously doesn't work, and neither does the reverse.  I was hoping
> > that the dialog would throw some kind of "I have been shown" event,
> > but it doesn't (as far as I can tell).  How do I make the dialog do
> > something as soon as it's been shown?
>
> It's too bad that you found an answer. You _shouldn't_ have your
> dialog pop up a file-selection box as soon as it's shown! That's
> not the way dialogs usually work, so you're going to confuse
> people.
>
> Instead, first pop up the file-selection box, and then pop up
> the dialog (without the Browse button) to do whatever else it
> does after you've got the filename.
>

That's actually what happens - the dialog throws EVT_INIT_DIALOG
before it displays itself.  Not that I really agree with you.  I don't
think that a "do such-and-such dialog" appearing with a "Select file
for such-and-such" file selector on top of it, the file selector being
in focus, is confusing for the user.  Actually, I think it'd be
friendlier - the user can see where the data from the file is going,
so has an immediate reminder of what the (generic) file selector is
for.


From cwitts at gmail.com  Mon May 26 09:20:37 2008
From: cwitts at gmail.com (Chris)
Date: Mon, 26 May 2008 06:20:37 -0700 (PDT)
Subject: Signal handler doesn`t handle any signals while main thread is 
	blocked
References: <mailman.1610.1211804786.12834.python-list@python.org>
Message-ID: <d061d1a6-d9fa-4bb2-b8fd-3381d70ae627@25g2000hsx.googlegroups.com>

On May 26, 2:26?pm, "Grzegorz Kokosi?ski" <g.kokosin... at gmail.com>
wrote:
> Hi!
> I waste a lot of my time figuring why this snip of code doesn`t work.
> And still without any solution ;/
> Does anybody know why this handler cannot handle SIGINT signal? What
> did I wrong?
>
> Thanks in advance.
>
> #
> # CODE
> #
> import signal
> from threading import *
>
> def siginthandler(signum, frame):
> ? ? ?global work,cv
> ? ? ?print 'terminating...'
> ? ? ?cv.acquire()
> ? ? ?work = 0
> ? ? ?cv.notifyAll ()
> ? ? ?cv.release()
>
> work = 1
> signal.signal (signal.SIGINT, siginthandler)
>
> print 'wait for SIGINT signal'
> cv = Condition ()
> cv.acquire()
> while work:
> ? ? print 'waiting...'
> ? ? cv.wait()
> print 'woke up'
> cv.release()
>
> print 'terminated'

change cv.wait() to cv.wait(delay) and it will capture the terminate
request and wrap the cv.wait(delay) in a try/except IOError: break
block.


From saluk64007 at gmail.com  Sat May 24 03:49:53 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 24 May 2008 00:49:53 -0700
Subject: Python is slow
In-Reply-To: <87lk20telh.fsf@physik.rwth-aachen.de>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
	<87lk20telh.fsf@physik.rwth-aachen.de>
Message-ID: <c3f69bf60805240049o6ead7b64k5464a45c2f0caf8b@mail.gmail.com>

Judging python's speed by how fast websites go is not going to work very
well.  There are many things that can bog down the "speed" of loading a web
site, especially if you are judging speed by how long a page takes to load.
torontolife.com is loading extremely slow for me also.  So is wikipedia.
Much slower than say, code.google.com, or the trac site I have running on my
remote server.  I have seen just as many slow php sites as slow python
sites.

Also, the hosting solution plays a huge part in how fast a site responds.
If someone is using python through cgi, that IS going to be very slow,
whereas other solutions are faster.  PHP sites are not hosted on cgi, while
many python solutions sadly still are.

So yeah, finding specific sites that are slow and written in python and
claiming that it's slow is trolling.  Youtube is slow these days, but a year
or more ago it was very fast.  They just haven't been able to keep up with
demand.  (Even movies play slow, constantly buffering, and the movies don't
even play from python).

Of all domains, the web domain needs speed (from logic code, where python
resides) the LEAST, because so much of the time is spent buffering packets,
alternating between threads or processes, or accessing the database or
files.  All of these operations contribute the most to slow web pages.  And
before you complain that python has to "buffer packets", or "access the
database", all of these operations are done at the C level (or lower).

Python is slow, but php is slower.  And python's speed is always improving.
On the other hand, it is much easier to find good php hosting services, due
to it's wide availability - better hosting = faster sites.
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From george.sakkis at gmail.com  Sat May  3 20:57:09 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 17:57:09 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com> <m2r6cjksw6.fsf@googlemail.com> 
	<fvikgm$gig$1@news.xmission.com>
Message-ID: <2c82d29f-271d-4f0f-bbf5-1e95f00b1677@y21g2000hsf.googlegroups.com>

On May 3, 5:12?pm, dave <squareswallo... at yahoo.com> wrote:
> thanks Duncan and Arnaud.
>
> I'm learning Python from the "How to Think Like a Python Programmer"
> book by Allen Downey. ?My first try used the "inv[val] = [key]" and
> then the next problem was to incorporate the "D.setdefault(...)" method.
>
> Thank you for your help. ?I'm always amazed how kind people are in this group.
>
> On 2008-05-03 14:57:29 -0600, Arnaud Delobelle <arno... at googlemail.com> said:
>
> > dave <squareswallo... at y1a2hoo3.com> writes:
>
> >> Hello,
>
> >> here is a piece of code I wrote to check the frequency of values and
> >> switch them around to keys in a new dictionary. ?Just to measure how
> >> many times a certain key occurs:
>
> >> def invert(d):
> >> ? ? ? ?inv = {}
> >> ? ? ? ?for key in d:
> >> ? ? ? ? ? ? ? ?val = d[key]
> >> ? ? ? ? ? ? ? ?if val not in inv:
> >> ? ? ? ? ? ? ? ? ? ? ? ?inv.setdefault(val, [key])
> > You can simply write:
> > ? ? ? ? ? ? ? ? ? ? ? ? inv[val] = [key]
> >> ? ? ? ? ? ? ? ?else:
> >> ? ? ? ? ? ? ? ? ? ? ? ?inv[val].append(key)
> >> ? ? ? ?return inv
>
> >> Using the methods above (I'm just a beginner) could I have written it
> >> more concisely? ?Any criticism/critique in the code would be greatly
> >> appreciated.
>
> > Apart from the unnecessary use of setdefault, it looks good to me.
>
> > * You could change if 'val not in inv:' to 'if val in inv:' (and swap
> > ? the if and else clauses of course) in order to have a positive
> > ? condition rather than a negative one
>
> > * If you want to use setdefault, you can replace the if .. else
> > ? construct by:
>
> > ? ? ? ? ? ? ? ?inv.setdefault(val, []).append(key)
>
> > * You can also iterate over keys and values using the items() or
> > ? iteritems() method of dictionaries:
>
> > def invert(d):
> > ? ? inv = {}
> > ? ? for key, val in d.iteritems():
> > ? ? ? ? inv.setdefault(val, []).append(key)
> > ? ? return inv
>
>

In Python 2.5 and later you may use the defaultdict class which is
faster and slightly more elegant in such cases:

from collections import defaultdict

def invert(d):
    inv = defaultdict(list)
    for key, val in d.iteritems():
        inv[val].append(key)
    return inv

George


From lists at cheimes.de  Thu May  1 17:57:08 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 23:57:08 +0200
Subject: dropping win98 support?
In-Reply-To: <372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92>	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
Message-ID: <481A3CB4.90408@cheimes.de>

illume schrieb:
> Ah, why is that?
> 
> There's still at least 1.1% of people using win98, if you believe this
> source of stats:
> http://www.w3schools.com/browsers/browsers_os.asp
> 
> I just noticed that win9x winme and win nt are all being dropped from
> python.
> 
> I know they are old and crufty, but there's still heaps of people
> using them.

The Python core developer team has limited resources. We don't want to
waste our energy with supporting ancient operation systems. Microsoft
has dropped the support for the 9x and NT series several years ago.
Dropping the support as well makes future development and new features
much easier for us.

Python can finally depend on the wide api functions and sane unicode
support.

> Someone pointed me to the pep, where the un-support seems planned:
> http://www.python.org/dev/peps/pep-0011/
> 
> 
> Seems like a lot of people using it, so it's still worthwhile making
> 2.6 work with win98.

People can still use Python 2.5. Users of deprecated and unsupported
OSes can't except new versions of software to run on their boxes.

Christian


From giles_brown at hotmail.com  Mon May 19 07:07:15 2008
From: giles_brown at hotmail.com (Giles Brown)
Date: Mon, 19 May 2008 04:07:15 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
Message-ID: <6ddae8ef-5886-4b37-aafb-50c8dbdb8a81@t54g2000hsg.googlegroups.com>

On 19 May, 06:11, sapsi <saptarshi.g... at gmail.com> wrote:
> Hello,
> I am using HadoopStreaming using a BinaryInputStream. What this
> basically does is send a stream of bytes (  the java type is : private
> byte[] bytes) to my python program.
>
> I have done a test like this,
> while 1:
>         x=sys.stdin.read(100)
>         if x:
>                 print x
>         else:
>                 break
>
> Now, the incoming data is binary(though mine is actually merely ascii
> text) but the output is not what is expected. I expect for e.g
>
> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
> 118.010.241.12 60370 128.210.5.176
>
> However i get a 1 before all and a 4 just after \n and before the 6.
>
> My question is : how do i read binary data(Java's byte stream) from
> stdin?
> Or is this actually what i'm getting?
>
> Thanks
> Sapsi

In the past I've sent binary data to a java applet reading
DataInputStream using xdrlib from the standard library.  I'd expect
that it would work in the reverse direction so I suggest you have a
look at that.

Giles


From renesd at gmail.com  Thu May  1 02:10:18 2008
From: renesd at gmail.com (illume)
Date: Wed, 30 Apr 2008 23:10:18 -0700 (PDT)
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91> 
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
Message-ID: <bec98d89-18d2-4407-b550-35e3ec8c1853@h1g2000prh.googlegroups.com>

hi again,

I should have said, the msvcr90.dll does not work on win9x machines -
as well as not being supported by ms.


cu,



On May 1, 4:02 pm, illume <ren... at gmail.com> wrote:
> Hi,
>
> after a little research it appears that win9x is not supported by the
> msvcr90.dll run time.
>
> Can you confirm this Lenard?
>
> Has anyone tested the new python binaries that link to msvcr90.dll on
> win9x machines?
>
> cheers,
>
> On May 1, 3:05 pm, "L. Lindstrom" <spam-t... at telus.net> wrote:
>
> > L. Lindstrom wrote:
> > > Christian Heimes wrote:
> > >> L. Lindstrom schrieb:
> > [snip]
> > >>> [B]esides heap management and FILE pointers, is there any reason SDL, or
> > >>> any C dependency, needs to link to the same C run-time as Python? If I
> > >>> ensure SDL frees memory it allocates and does not directly access a file
> > >>> opened by Python can I just use another C run-time such as msvcrt?
>
> > >> Your analysis of the problem and the implication of mixing CRTs is
> > >> correct. However ...
>
> > >> It should be trivial to modify the build systemof SDL so that the
> > >> manifest is integrated into the DLLs. Everything else is a hack. It
> > >> *should* work and in reality it *does* work for most cases. But someday
> > >> you'll hit a solid wall and get strange and hard to debug segfaults.
>
> > [snip]
> > > Linking to msvcr90.dll is possible with MinGW. The problem is with the
> > > configure scripts. So I can run configure against msvcrt.dll, then
> > > switch to mscvr90.dll for make. If this works I will make SDL and a test
> > > program available on-line so someone can find the appropriate manifests.
>
> > Here is my attempt to link SDL and a test program with msvcr90.dll. It
> > can be found athttp://www3.telus.net/len_l/pygame. The md5sum is:
>
> > f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip
>
> > Both lack a manifest. The test program and SDL work when a surrogate
> > run-time is provided, a renamed msvcr71.dll . So if someone can show me
> > the necessary manifest to make SDL use the C run-time installed by the
> > Python 2.6 installer I would appreciate it. SDL is built with MinGW so I
> > doubt I can distribute the run-time with it.
>
> > --
> > Lenard Lindstrom
> > "%s@%s.%s" % ('len-l', 'telus', 'net')



From wxPythoner at gmail.com  Tue May 13 06:10:13 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 03:10:13 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
Message-ID: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>

We have to avoid the use of the 'is' identity operator with basic,
immutable values such as numbers and strings. The result is
unpredictable because of the way Python handles these objects
internally.

How is with this issue in Python 3.0? Is it fixed? Does Python handle
this things properly now?


From sturlamolden at yahoo.no  Sat May 17 21:44:56 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sat, 17 May 2008 18:44:56 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <75c44374-fd3a-458f-89ab-e78bdbad5d7c@k13g2000hse.googlegroups.com>

On May 18, 12:32 am, Vicent Giner <vgi... at gmail.com> wrote:

> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

First of all: whatever you do, use NumPy for all numerical work (and
possibly Scipy). Remember that Python with NumPy tend to be faster
than Matlab. Anything that applies to Matlab regarding vectorization
for speed also applies to NumPy.

If your program runs too slowly, try to use the psyco jit compiler
first. If that doesn't help, try one of the following:

- use Cython or Pyrex and compile your (modified) Python code
- inline C++ using scipy.weave
- write a function in C and call it using ctypes
- write a function in Fortran and make it callable from Python using
f2py

Usually, only small bottlenecks matter when it comes to overall
performance. It is also notoriously difficult to guess where they are.
Therefore: write everything in Python first, then profile your code to
identify bottlenecks. Only important bottlenecks need to be translated
to Pyrex, C or Fortran.

http://www.scipy.org/PerformancePython


> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context.

Google NumPy, SciPy, Matplolib and Sage.

NASA uses Python to process image data from the Hubble telescope.





> Thank you in advance.



From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 12:42:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 18:42:32 +0200
Subject: class-oriented rather than object-oriented?
In-Reply-To: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <483ae877$0$2332$426a74cc@news.free.fr>

notnorwegian at yahoo.se a ?crit :
> i have some confusion over this.
> 
> sure a class is basically a classification, like for example an animal
> or flower. and an object/instance of that class is then for example a
> cat.
> 
> an object is an instance of a class.

Depends on the language.

> that i know, i also know how to
> program with classes etc.
> 
> i am just confused about the term object-oriented.
> 
> wouldnt class-oriented be more fitting? at least for java since what
> you do is divide everything into classes.

InMyArms(tm) !-)

> in python i dont or at leats not as much.

Fact is that Python is more concerned about objects and less about 
classes. While you do have the concept of a class in Python, it's in 
some points closer to javascript's prototypes. Amongst other things, the 
object/class relationship is not necessarily static - you can 
dynamically rebind an object to another class (whether it's a good idea 
is another question), dynamicallt add/remove/replace attributes 
(including methods) on a per-instance or per-class basis, etc.

> 
> does object-oriented refer to that everything(strings, ints etc) are
> all objects?

The only commonly accepted definitions I know wrt/ OO are :

1/ an OO program is composed of objects interacting thru messages
2/ an object is defined by an identity, a state and a behaviour

So to answer your question:

Not necessarily, but having non-object "things" in an OO program somehow 
contradicts definition #1 IMHO.

BTW, you'll notice that there's nowhere mention of "classes" here...

> so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

... nor of "primitive types" !-)

> are python functions objects?

Yes. As well as classes, modules, and even the function's code. From 
this POV, Python is 100% object. wrt/ to the "message passing" part, 
it's probably a bit more debatable, specially when compared to Smalltalk 
where messages are the only control structure.

> can a functional language be object-oriented or an objectoriented
> language be functional?

Well... Depends on the definitions of "object-oriented" and 
"functional". There are indeed some languages that try to support both 
approach, coming either from the OO side (Python, Ruby, Javascript...) 
or from the functional side (OCaml, Common Lisp, Scheme, ...).

Now none of these languages are "pure" functional languages. The point 
is that OOP and FP are two different and more or less incompatible 
approach toward state management. OOP try to encapsulate state into 
objects, while FP try to simply get rid of any shared state.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

If your classes are objects, then what's the difference ?-) And if they 
are not, how are you going to pass messages between them ?

But the fact is that the concept of "class" is by no mean central, nor 
even necessary, to OO. You might want to have a look at languages like 
Self, Io and Javascript, which are prototype-based instead of class-based.


From vivainio at gmail.com  Sat May 24 11:56:21 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sat, 24 May 2008 15:56:21 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
Message-ID: <87prrbk85x.fsf@gmail.com>

Fuzzyman <fuzzyman at gmail.com> writes:


> The 'we told you not to use that' approach, when applied to paying
> customers doesn't really work... all they see is that you broke
> their spreadsheet code by changing your API.

And the customer point of view is quite reasonable - they have a job
to do, and a limited timeframe; sometimes accessing privates directly
is much better than waiting for updates from vendor. Bad designs (as
far as choosing publics goes) happen.

Even if their softare breaks on upgrade, you can quite clearly point
out that they used an internal api - and they will keep on using the
old version until they solve the problem. Everybody wins.

Perhaps a lint-like validation tool would be optimal for this
problem...



From myshelter at gmail.com  Sun May  4 06:22:35 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 03:22:35 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
Message-ID: <ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>

I had previously ran the import line. I prepended it to the example
code I'm trying to run every time but it did not help, still nothing
happens. With or without var before 'root'. I'm pasting the code in
IDLE and using Windows XP as written in the first post.

On May 4, 11:04 am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
wrote:
> Try adding:
>
> from Tkinter import *
>
> at the beginning, and you don't need "var" in front of root=Tk(), just
> "root = Tk()"   (<-without the quotes of course)
> What OS are you on?  Are you running "python testapp.py" or similar to
> make it run?
>
> -Chuckk
>
>
>
> On Sun, May 4, 2008 at 12:39 PM, Protected <protec... at myshelter.net> wrote:
> > Good thinking. It was indented with spaces, so I replaced them with tabs.
> > Now I'm getting a SyntaxError: invalid syntax in root = Tk(). If I split the
> > code in two parts (with the second one beginning in that line) and run them
> > separately, I get no errors, but still nothing happens.
>
> > class Application(Frame):
> >     def say_hi(self):
> >         print "hi there, everyone!"
>
> >     def createWidgets(self):
> >         self.QUIT = Button(self)
> >         self.QUIT["text"] = "QUIT"
> >          self.QUIT["fg"]   = "red"
> >         self.QUIT["command"] =  self.quit
>
> >         self.QUIT.pack({"side": "left"})
>
> >         self.hi_there = Button(self)
> >          self.hi_there["text"] = "Hello",
> >         self.hi_there["command"] = self.say_hi
>
> >         self.hi_there.pack({"side": "left"})
>
> >     def __init__(self, master=None):
> >          Frame.__init__(self, master)
> >         self.pack()
> >         self.createWidgets()
>
> > var root = Tk()
> > app = Application(master=root)
> > app.mainloop()
> > root.destroy()
>
> > On Sun, May 4, 2008 at 12:33 PM, Q4 <q... at invalid.com> wrote:
>
> > > On Sun, 4 May 2008 02:23:37 -0700 (PDT), Protected <myshel... at gmail.com>
> > > wrote:
>
> > > > Hello. I'm a complete newbie trying to learn Python. I decided to try
> > > > some Tkinter examples, including the one from the library reference,
> > > > but they don't seem to do anything! Shouldn't there be, like, a
> > > > dialog?
>
> > > > I'm running Windows XP and using IDLE. You can assume my version of
> > > > Python is the latest.
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > If you just copy the code from the python doc the indentation might be
> > > broken.
> > > Send the code and I'll take a look at it.
>
> > > Do you get any errors?
>
> > > --
> > > My website:
> > >  http://www.riddergarn.dk/koder/
>
> > --
> >  http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com



From lew at lewscanon.com  Thu May  8 06:53:36 2008
From: lew at lewscanon.com (Lew)
Date: Thu, 08 May 2008 06:53:36 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <rem-2008may08-005@yahoo.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com>
Message-ID: <oaGdnQBiu-stRr_VnZ2dnUVZ_qrinZ2d@comcast.com>

Robert Maas, http://tinyurl.com/uh3t wrote:
> I have my own gripe against regular expressions ("regex" for short).
> I hate the extremely terse format, with horrible concoctions of
> escape and anti-escape magic characters, to fit within Unix's
> 255-character limit on command lines, compared to a nicely
> s-expression nested notation that would be possible if regex hadn't
> entrenched itself so solidly.

This is all very interesting, but not Java.

-- 
Lew


From martin at v.loewis.de  Fri May  9 19:37:07 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 May 2008 01:37:07 +0200
Subject: PyXml
In-Reply-To: <mailman.890.1210367123.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
Message-ID: <4824E023.1060803@v.loewis.de>

> What's the story with PyXml?  Is it stable/complete or has effort moved
> elsewhere?

Large parts of PyXML are now part of the standard library. When I
stepped back as a maintainer, nobody volunteered to take over.

> Can anyone recommend a Python validating parser that validates vs Xml
> Schema?

The libxml bindings for Python can do that.

Regards,
Martin


From duncan.booth at invalid.invalid  Thu May  8 04:11:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 08:11:19 GMT
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <Xns9A985D454FA54duncanbooth@127.0.0.1>

andrej.panjkov at climatechange.qld.gov.au wrote:

> Here is a simple lambda that implements an exclusive or:
> 
>>>> def XOR(x,y) :
>>>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) 
)
> 
> (Because of the resemblance to C macros, I have been cautious and
> written the lambda with lots of parentheses.)
> 
> To use this in later code, we define instances of the lambda with
> specific function arguments.
> 
>>>> topping = XOR( cream, icecream)
>>>> sauce = XOR( tomato, BBQ )
> 
> 
> We now have two ??functions??, topping() and sauce() which we can use
> later to test flags.
> 
>>>> cream = True
>>>> icecream = False
>>>> print topping()
> True
> 

No, no, no, no, no!

You have got it entirely wrong here. Your XOR function simply returns a 
function which gives you the result of xoring the parameters AT THE TIME 
WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set 
cream and icecream (otherwise the call to XOR would have thrown an 
exception) and at leas one was true. Try setting them both False at the 
beginning:

>>> cream = False
>>> icecream = False
>>> topping = XOR( cream, icecream)
>>> cream = True
>>> icecream = False
>>> print topping()
False

Using a lambda was a completely pointless exercise here, you could have 
just returned the result directly:

>>> def XOR(x,y):
	return x^y

>>> topping = XOR(cream, icecream)
>>> print topping
True

Same thing for your TFF function:

def TFF(x,y,z) :
  return x and not y and not z

AddOnly = TFF( options.AddAction, options.ReplaceAction,
options.DeleteAction )
DeleteOnly = TFF( options.DeleteAction, options.AddAction,
options.ReplaceAction )
ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
options.DeleteAction )

if not (DeleteOnly or AddOnly or ReplaceOnly):
  print "Error:  Exactly one of  [ --add | --replace | --delete ]
allowed. "
  parser.print_help()
  exit

which boils down to:

if (options.AddAction + options.ReplaceAction +
        options.DeleteAction) != 1:
    print "Error: ..."


From malaclypse2 at gmail.com  Fri May 23 22:45:11 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 23 May 2008 22:45:11 -0400
Subject: Storing objects in relational database
In-Reply-To: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
Message-ID: <16651e80805231945o4307c860i97bdbd30a63ae20e@mail.gmail.com>

On Fri, May 23, 2008 at 5:07 PM, nayden <nayden at gmail.com> wrote:
> The reason I am writing here is that I can't seem to figure out how to
> save/restore python objects into a relational database.

Here's a basic version using the sqlite bindings included with Python 2.5:

import sqlite3, pickle

thing = {'date': '2008-05-21',
         'event': 'Something happened this day'}

conn = sqlite3.connect(':memory:')
c = conn.cursor()
c.execute('''create table stuff (idx integer, data text)''')
c.execute('''insert into stuff values (?,?)''', (1, pickle.dumps(thing)))
c.execute('''select data from stuff where idx=1''')
row = c.fetchone()
# sqlite3 stores text fields as unicode, so we need to encode to ascii
# before we unpickle
pickle_str = row[0].encode('ascii')
thing2 = pickle.loads(pickle_str)

print thing
print thing2

Maybe that will set you on the right track.

-- 
Jerry


From ian.g.kelly at gmail.com  Tue May  6 15:50:55 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 13:50:55 -0600
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <3fc761710805061250k5cc4de5al7157f9e888d938b5@mail.gmail.com>

On Tue, May 6, 2008 at 1:42 PM, Anton Slesarev <slesarev.anton at gmail.com> wrote:
>  Is it possible to increase file reading performance?

Dunno about that, but this part:

>  flines = (line for line in f if pat.search(line))
>  c=0
>  for x in flines:
>     c+=1
>  print c

could be rewritten as just:

print sum(1 for line in f if pat.search(line))


From deets at nospam.web.de  Tue May  6 11:56:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 17:56:34 +0200
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <68bdeeF2scu7cU1@mid.uni-berlin.de>

> Ah ha, thar's the disconnect.  Thanks for all the pointers, my def is
> now working.  Still don't understand the logic behind this design though.
> I mean why would any programming language have separate search or find
> functions, one for regex and and another for non-regex based pattern
> matching?
> 
> Aren't sed, awk, grep, and perl the reference implementations of search
> and replace?  They don't have non-regex functions, why does Python?
> Wouldn't it be a lot simpler to use a flag, like grep's '-f', to change
> the meaning of a search string to be literal?

And by this possibly destroying other modules code that rely on their
respective strings being that - and not patterns.
 
> My other gripe is with the kludgy object-oriented regex functions.
> Couldn't these be better implemented in-line?  Why should I, as a coder,
> have to 're.compile()' when all the reference languages do this at compile
> time, from a much more straightforward and easy to read in-line
> function...

You can do that already, no need to - the patterns are cached. Albeit the
cache might be limited in size. but code like

m = re.match(pattern, s)

is not considerably slower than

rex = re.compile(pattern)
m = rex.match(s)

Diez


From marlin_rowley at hotmail.com  Fri May 16 18:31:30 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 17:31:30 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <g0l1jt$vc$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
Message-ID: <BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>

Thank you!  That solved it!
 
-M



> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 17:25:00 -0500> > Marlin Rowley wrote:> > All:> > > > I'm getting different floating point values when I use numpy vs. unpack().> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > buffer = unpack("!f", byte)> > > > frgba[0] != buffer[0]> > > > why? This is forcing me use the unpack() function since it's giving me > > the correct values. What am I doing wrong?> > Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most > likely, you are on a little-endian platform. All of the dtypes in numpy default > to the native-endianness unless specified. If you want to read big-endian data > using numpy, do this:> > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > If you have any more problems with numpy, please join us on the numpy mailing > list. When reporting problems, please try to provide a small but complete > snippet of self-contained code, the output that you got, and explain the output > that you expected to get. Thank you.> > http://www.scipy.org/Mailing_Lists> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
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From kamhung.soh at gmail.com  Sun May 11 02:10:54 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 16:10:54 +1000
Subject: firefox add-on to grab python code handily?
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <op.uay7ggimev04yd@hungvista>

On Sat, 10 May 2008 17:58:12 +1000, CM <cmpython at gmail.com> wrote:

> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
>
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
>
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
>
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?
>
>

Not a Firefox add-on, but I found GnuWin32's "getclip" and "putclip" tools  
useful.  If you are familiar with shell tools, you can use "sed" to remove  
leading indentation marks such as "> " before you paste sample code into  
your IDE:

getclip | sed "s/> //" | putclip

See http://kamhungsoh.com/blog/2008/05/more-uses-of-getclip-putclip.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From wuwei23 at gmail.com  Wed May 21 01:52:01 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 20 May 2008 22:52:01 -0700 (PDT)
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
Message-ID: <86369376-183f-41ea-a2e3-423891856ce9@w4g2000prd.googlegroups.com>

On May 21, 10:59 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> I'd like to propose that debug-on-exception be made into a standard
> feature that is easy to enable, e.g. with a command line option
> or with a simple pdb call immediately after the import:

Forgive me if I've missed your point, but it seems you can already do
this:

	pdb.py can also be invoked as a script to debug other scripts.
	For example:

	python -m pdb myscript.py

	When invoked as a script, pdb will automatically enter post-mortem
	debugging if the program being debugged exits abnormally. After
	post-mortem debugging (or after normal exit of the program), pdb
	will restart the program. Automatic restarting preserves pdb's
	state (such as breakpoints) and in most cases is more useful than
	quitting the debugger upon program's exit. New in version 2.4:
	Restarting post-mortem behavior added.

http://docs.python.org/lib/module-pdb.html


From kuratkull at kuratkull.com  Mon May 19 10:29:53 2008
From: kuratkull at kuratkull.com (kuratkull at kuratkull.com)
Date: Mon, 19 May 2008 07:29:53 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
	<2196ab0c-93f4-4dba-807f-32f2a9391826@m36g2000hse.googlegroups.com>
Message-ID: <bc8bcbeb-c794-4c82-8529-07ce83662c32@a1g2000hsb.googlegroups.com>

On May 19, 4:01 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 19, 4:54 am, kuratk... at kuratkull.com wrote:
>
>
>
> > Hello,
>
> > ***************
> > import urllib2
> > import re
> > import string
> > import sys
>
> > url = "http://www.macgyver.com/"
> > request = urllib2.Request(url)
> > opener = urllib2.build_opener()
> > html = opener.open(request).read()
>
> > match = re.compile("<PRE>(.+)</PRE>", re.DOTALL)
>
> > out = match.findall(html)
>
> > print out
> > **************
This worked like a charm! :)
I used Python about a year ago and I have forgotten some of its
properties.

Thanks to both of you!
-kuratkull

>
> > I would like to print out string with formatting, but as I read, the
> > string is made into a raw string when using re.
> > How could I disable or bypass this?
>
> > I googled for an hour and couldn't find a solution.
>
> > Thank you in advance.
>
> Change your print statement to:
>
> print out[0]
>
> -- Paul



From larry.bates at websafe.com`  Fri May  2 15:25:43 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 14:25:43 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>

TkNeo wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>> TkNeo wrote:
>>> WHAT ?
>>> This is crazy
>> Crazy like a fox?
>>
>> a = [1, 2, 3]
>> try:
>>      a.index(99)
>> except:
>>      a.append(99)
>> finally:
>>      print a.index(99)
>>
>> MY question: which exception should I actually be catching there?
>> ** Posted fromhttp://www.teranews.com**
> 
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.

-1 doesn't make any sense.  How could you tell the difference between the value 
being there and actually being -1 and it not being there and Python returning 
-1?  Raising an IndexError is the proper behavior.  You should catch the 
IndexError if you are going to be indexing into an list with arbitrary indexes.

-Larry


From d.a.abernathy at gmail.com  Fri May 30 09:53:01 2008
From: d.a.abernathy at gmail.com (dj)
Date: Fri, 30 May 2008 06:53:01 -0700 (PDT)
Subject: Has a file been opened by another program ?
Message-ID: <beeafce7-897e-4fe0-b9e8-81ce21fac902@m73g2000hsh.googlegroups.com>

Hello All,

First, Is there a python library, method or module that will tell you
if a file has been opened by another program (i.e: Word, PowerPoint,
IE etc.), the methods I have found in the standard library will only
work with the python open method.

Second, I want to take the time to thank each and everyone of you for
your help. If you have not already guessed, I am a python novice ( I
know your surprised), and I am learning a lot and have discovered alot
about python from your answers. So, I just want to say....... THANK
YOU !!!!!


From gagsl-py2 at yahoo.com.ar  Fri May  2 21:52:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 22:52:21 -0300
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
Message-ID: <op.uaj15jxix6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 12:07:55 -0300, D'Arcy J.M. Cain <darcy at druid.net>  
escribi?:
> On Sat, 03 May 2008 00:43:02 +1000
> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> Roy Smith <roy at panix.com> writes:

>> > Have you ever shipped software to a customer?
>>
>> Yes, and all parties have been quite happy with the results.
>
> When some of us talk about shipping software we aren't talking about a
> 20 line script delivered to our uncle's construction company office.  We
> are talking about millions of lines of code in thousands of programs and
> modules that has to run out of the box on whatever system the client
> happens to run on.
> [...]
> Simple for your 20 line single script.  Not so simple for my million
> line, integrated system that has to work everywhere.

In that case you have a setup script, I presume. You use distutils or a  
better alternative, I presume. You use the scripts= argument to setup, or  
the install_scripts distutils command, I presume. The first line on your  
scripts starts with #! and contains the word python somewhere, I presume.  
Then, distutils will adjust that shebang line using the same python  
executable that was used to run the installation.
It doesn't matter whether the line read #!/usr/bin/python, #!/usr/bin/env  
python, #~/bin/python2.3 or just #!python: whatever Python was used to  
install your program, that will be written as the first line on the  
script, and consequentely that will be used to execute the script in the  
future. So the admin (or whoever installs the system) only has to make  
sure to use the right Python version from the right directory. That's all.  
Plain easy, isn't it?

I can't believe some angry responses in this thread - it's just a  
technical question, not about which is the best team in the [preferred  
sports here] National Championship...

-- 
Gabriel Genellina



From yguan08 at gmail.com  Tue May 13 18:14:38 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 15:14:38 -0700 (PDT)
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
Message-ID: <4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>

On May 13, 4:38?pm, John Machin <sjmac... at lexicon.net> wrote:
> ygua... at gmail.com wrote:
> > I have trouble of obtaining the file size of a file because the
> > fullpath exceeds 255 characters. I get this message with
> > os.path.getsize(fullpath).
>
> > fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> > \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> > \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> > \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> > Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> > fsize = os.path.getsize(fullpath)
>
> > WindowsError: [Error 206] The filename or extension is too long:
>
> > The same thing with os.stat(fullpath).
>
> > I tried using the relative path, but it does not work with the message
> > fname not found.
>
> > dir = os.path.dirname(fullpath)
> > fname = os.path.basename(fullpath)
> > os.chdir(dir)
>
> I suspect that the cause of the problem here is that while *x OSes have
> just one current working directory, Windows has one cwd per drive.
>
> > filesize = os.path.getsize(fname)
>
> > Is there a walk around of this?
>
> At the DOS command level, you can do
> ? ? ?subst x: very\long\path
> and then refer to
> ? ? ?x:filestem.ext
> where x is any unused drive letter.
>
> This seems to work:
>
> ?>>> import os
> ?>>> os.system('subst x: c:\\junk')
> 0
> ?>>> f = open('x:foo.py')
> ?>>> f.read()
> "print 'hello'\n"
> ?>>>
>
> HTH,
> John- Hide quoted text -
>
> - Show quoted text -

Good idea. But subst does not see to work with path that has spaces.
It gives "Incorrect number of parameters"



From bruno.desthuilliers at gmail.com  Wed May 14 17:08:03 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:08:03 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com>
Message-ID: <2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com>

On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
> On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > single language compiler instead of three dimensional compiler that
> > GCC is (cross platform, cross target platform, cross language).
>
> And to add, I also need to mention that Python doesn't need to be
> compiled at all,

No language needs compilation - it's an implementation problem, not a
language problem. Now all the Python's implementations I know do use
compilation (to byte-code).

> its py and pyo file is architecture independent.

True, but this is not strictly related to being compiled or not.




From george.sakkis at gmail.com  Mon May 12 23:29:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 20:29:46 -0700 (PDT)
Subject: how to get information of a running prog in python
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
Message-ID: <d40f818e-6039-4c6b-8cc9-81cd742a9e4b@2g2000hsn.googlegroups.com>

On May 12, 11:02?pm, Jimmy <mcknight0... at gmail.com> wrote:
> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>
>
> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
> > > Well, i know it may be a little non-python thing, however, I can think
> > > ?of no place better to post this question :)
>
> > > ?can anyone tell me, in python, how to obtain some information of a
> > > ?running program?
> > > ?paticularly, if i am playing some music in audacious or other media
> > > ?player, how can i get the the name and some other info of current
> > > ?playing song? It seems that audicious doesn't output on run-time
> > > ?--
> > > ?http://mail.python.org/mailman/listinfo/python-list
>
> > In most cases, you'll probably need some sort of API, either in the
> > program itself or through some sort of plugin, that lets external
> > programs query it. ?For instance, there are some plugins to WinAmp
> > that allow external programs (like Last.FM or Mog-O-Matic) to see what
> > track is currently playing. ?You may also be able to do something like
> > get the window title (again, WinAmp's title bar usually includes the
> > artist and title) and parse it out. ?I don't really know that there's
> > anything specific to Python for accessing these though, and it may
> > vary depending on media player.
>
> > Just my two cents...
>
> > -dan
>
> thanks!
>
> In linux, I am always obfuscated by sort of APIs. Like how to get
> title information of a running program?
> where am I supposed to find these APIs

I think you're a little confused about how computers work in general
and what a program can do, and you expect there is some general
superprogram able to decipher what an arbitrary other running program
does. The sentence "how to get title information of a running program"
doesn't even make sense for most programs since they don't play music
anyway.

Your best bet is if the *specific* program you're interested in (e.g.
audacious) exposes this information programmatically in some way. It's
up to the developers of this application if and how they choose to do
it. Even if they do it, there's no requirement that the same API will
work for any other program of the same category, unless there is some
popular industry standard that most applications implement.

In short, you'll get more helpful replies at the audacious newsgroup.

HTH,
George


From rdm at rcblue.com  Wed May 28 10:58:19 2008
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 28 May 2008 07:58:19 -0700
Subject: A video introducing Ulipad, an IDE mainly for Python
Message-ID: <20080528145832.685CA1E4008@bag.python.org>

I've been using Ulipad, a free IDE mainly for Python, and written in 
wxPython, for a couple of years, and think it's terrific. Now another 
user, Kelie Feng, has made an 8-minute video showing it off. The 
visual clarity of the video is remarkable. You can download it 
(Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may 
be necessary for your player, from <http://www.rcblue.com/u3/>.

Dick Moores



From ian.g.kelly at gmail.com  Tue May 27 13:43:52 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 11:43:52 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <027e0b24$0$26906$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com>
Message-ID: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>

On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnjsal at nospamgmail.com> wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
> news:69g605F2v4102U2 at mid.uni-berlin.de...
>> After being corrected about missing the construction of a None-containing
>> list, one needs of course to think about the waste of resources, as a
>> possible result-list is created in any case.
>
> Yeah, I was already aware of the list of Nones, which is why I asked. Simply
> typing the list comprehension without an assignment just *looked* wrong,
> too.

It sounds like the wasteful list creation is the biggest objection to
using a list comprehension.  I'm curious what people think of this
alternative, which avoids populating the list by using a generator
expression instead (apart from the fact that this is still quadratic,
which I'm aware of).

def compress(s):
   new = []
   filter(None, (new.append(c) for c in s if c not in new))
   return ''.join(new)


From needin4mation at gmail.com  Thu May  1 10:59:49 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 07:59:49 -0700 (PDT)
Subject: simple beginner question about lists and negative index
Message-ID: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>

This program:

s = 'abcde'
i = -1
for i in range (-1, -len(s), -1):
    print s[:i], i

gives

abcd -1
abc -2
ab -3
a -4

Why doesn't the first one have the e if -1 is the end of the list?  In
Dive Into Python it said that -1 was the end of the list.  Thanks.

it is from Chun's book, slightly modified by me to see the index.


From gagsl-py2 at yahoo.com.ar  Fri May 16 23:27:31 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 May 2008 00:27:31 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
Message-ID: <op.ua93v5xsx6zn5v@gabriel2.softlabbsas.com.ar>

(warning: it's a rather long message)

En Fri, 16 May 2008 12:58:46 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:
> On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
> <gagsl-py2 at yahoo.com.ar> wrote:
>> En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
>> <dullrich at sprynet.com> escribi?:
>>
>>> The other day I saw a thread where someone asked
>>> about overrideable properties and nobody offered
>>> the advice that properties are Bad. So maybe we've
>>> got over that. I suppose properties could have
>>> Bad consequences if a user doesn't know they exist
>>> and think that a certain property of an object is
>>> just an ordinary attribute. But that applies to
>>> almost any aspect of any language.
>>
>> Which "bad consequences" are you thinking of?
>
> Didn't have anything specific in mind - there I was
> just playing devil's advocate. I've seen a lot of people
> here say things like "properties should only be used
> when refactoring" without any explanation that I could
> see of why properties were bad things. I was referring
> to whatever problems they had in mind.

I suppose those people were talking about this usage:

   def getfoo(self): return self._foo
   def setfoo(self, value): self._foo = value
   foo = property(getfoo, setfoo)

Just use a plain foo attribute instead. Almost nobody will notice the  
difference, and it's faster, easier to maintain, easier to test, less  
magic... But if you *do* have more to do besides handling the _foo  
attribute, using a property is OK, at least for me. And from your other  
comments, I can see it's fine for you too.

>>> If a person comes from, say, Object Pascal (Delphi)
>>> then properties are hard to live without. The
>>
>> You should read the article "Python is not Java" if you haven't done it  
>> yet.
>> http://dirtsimple.org/2004/12/python-is-not-java.html
>
> I suspect you misunderstood my point there. I actually read that
> article years ago. Been using Python for years. I'd never confuse
> it with OP, I promise (luckily I don't know any Java and don't
> intend to). I really didn't express what I meant very well - what
> I should have said was more like "If you're accustomed to properties
> from a language like OP they seem like a very useful addition to
> Python".

Oh, sure. I missed them a lot until they became available in Python. And I  
even wrote a fake property mixin class for Python 2.1 (horrible and slow!).
Now I understand better what you're saying.

>   window.pos = (x,y)
>
> seems more natural than
>
>   window.SetPos(x,y);
>
> in these cases the work involved in changing the cell
> value or the window position is going to make the
> extra overhead of the property interface irrelevant.

Sure, that looks like a good candidate for using a property.

>> But I prefer to have as little magic as possible on my objects: if it  
>> says m.row[0] = [1,2,3] I
>> expect m.row[0] to actually *be* that list (whenever possible), and not  
>> any other object initialized
>> from the [1,2,3] arguments. (Maybe this is some overreaction against  
>> C++ "magic" constructors and such horrible things...)
>
> Whatever - the idea here is that m.row[0] is going to walk and quack
> exactly like that list would, but also do other things that the liist
> can't do, like you can add two of them.
>
> (When you say anobject.aproperty = 2 you also expect aproperty to
> be 2? But if aproperty is a property that's not necessarily so - this
> seems like as much an argument against properties in general as
> against my version. Or perversion, if you like.)

No, I don't necesarily expect it, but I try to maintain that behavior as  
long as I can; I try to keep things simple and intuitive. This is a rather  
used idiom:

   items = foo.items = []
   for x in someiterator:
     if somecondition:
       ...
       items.append(x)
       ...

That works fine if foo.items is items - but if items were a property that  
holds its own internal list, the code above would be broken. In that case,  
replacing a simple attribute with a property would *not* be equivalent;  
and I try to follow the "principle of least astonishment" and avoid such  
situations as long as possible.

(I think that in OP the equivalent of m.row[0] = [1,2,3] isn't very usual  
- mostly because there isn't a list literal, I presume)

> _A_ workaround would be to simply not have indexedproperties
> be class attributes, instead saying self.whatever =
> indexedproprty(whatever) in __init__.

Unfortunately that doesn't work. Properties get their "magic" when  
searched in the class namespace - a property set as an instance attribute  
doesn't behave as a property at all, it's just an attribute as any other.

>> class Matrix2x2(object):
>>   def __init__(self):
>>     self.cells = [[0,0], [0,0]]
>>
>>   def __setitem__(self, (row, col), value):
>>     self.cells[row][col] = value
>>
>>   def __getitem__(self, (row, col)):
>>     return self.cells[row][col]
>>
>> class AClass(object):
>>   def __init__(self):
>>     self.cell = Matrix2x2()
>
> Well, something like this is where I was before coming up with
> the indexedproperty thing. Unless I'm missing something, which
> has happened before, what you write above can't work, because
> self.cell has to know what Matrix2x2 created it so it knows
> what AClass instance to modify when it's modified. (No, we
> can't just leave the state information in self.cells; think of the
> case of a Matrix with a row[] property and also a col[]
> property - they have to be modifying the data stored in
> the owning matrix.)

The above class works fine in the simple cases I tested it - including the  
bug involving two AClass instances. Adding "row" and "col" views is rather  
simple:

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2()
     self.row = ViewAsRow(self.cell)
     self.col = ViewAsCol(self.cell)

class ViewAsRow(object):
   def __init__(self, matrix):
     self.cells = matrix.cells

   def __getitem__(self, index):
     return self.cells[index][:]

   def __setitem__(self, index, row):
     self.cells[index][:] = row

class ViewAsCol(object):
   def __init__(self, matrix):
     self.cells = matrix.cells

   def __getitem__(self, index):
     return [row[index] for row in self.cells]

   def __setitem__(self, index, col):
     for row, value in zip(self.cells, col):
       row[index] = value

There is no need for the ViewAsCol nor ViewAsRow classes to know they're  
being used inside an AClass instance. (A better design would avoid to use  
matrix.cells - but I was constrained by the original Matrix2x2 design that  
I didn't want to modify.)

> (again, it doesn't have to be like that in this case,
> but it does in the case where various "properties"
> like cells are giving different sorts of access to the
> same data, which data then has to be stored in AClass.)

But you may have many references to the *same* data and view it in  
different ways - you don't have to walk thru the intermediate AClass  
"container" because AClass doesn't "store" data; the data is "stored" in  
the list itself, AClass instances only contain the name "cell" bound to  
the Matrix2x2 object.

In OP terms, all objects in Python act like those inheriting from TObject,  
not like basic types (numbers, char, string...). An important difference  
is that Python takes care of automatic object deletion when they're no  
longer used, but in OP you have to manage the object's lifetime yourself.  
So in OP it is important *who* owns some object; and sharing a TList  
instance -by example- isn't so frequent because when the list is freed all  
its references become invalid (so one needs some kind of notification...)
In Python, on the other side, many objects may have a reference to the  
same other one, like the Matrix above - it won't disappear until nobody  
else references it. This sharing behavior may be a Good Thing or a Bad  
Thing, depending on the circumstances. By example, the ViewAsRow class  
above *could* return an actual list from the Matrix2x2 instance, but I  
choose not to, to emphasize that it's a *view* of the underlying data  
(else, modifications to the returned list would alter the data itself).

> And then that's the point to the indexedproperty;
> the code passing data back and forth doesn't need
> to be rewritten with each property, it's all done
> inside the implementation of the indexedproperty
> class. I realized that I could just use object attributes
> instead, but it seems to me that indexedproperty
> encapsulates the data-passing protcol once and for
> all instead of requiring it to be redone each time.

I don't understand what you call "data-passing protocol"; as far as I can  
tell, there is no data-passing, only names refering to the same and unique  
object instance.

-- 
Gabriel Genellina



From dullrich at sprynet.com  Wed May 14 17:39:13 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Wed, 14 May 2008 16:39:13 -0500
Subject: sys.excepthack...
References: <mailman.1136.1210799421.12834.python-list@python.org>
Message-ID: <dullrich-30C8F0.16391314052008@text.giganews.com>

In article <mailman.1136.1210799421.12834.python-list at python.org>,
 Jean-Paul Calderone <exarkun at divmod.com> wrote:

> On Wed, 14 May 2008 15:47:18 -0500, "David C. Ullrich" <dullrich at sprynet.com> 
> wrote:
> > [snip]
> >
> >Came up with a ridiculous hack involving both sys.stderr
> >and sys.excepthook. Works exactly the way I want.
> >Seems ridiculous - what's the right way to do this?
> >
> > [snip]
> 
> Hi David,
> 
> Take a look at the traceback module.  The excepthook gets called with
> an exception type, instance, and traceback object.  The traceback module
> is good at turning these things into strings.

Thanks.

> Jean-Paul

-- 
David C. Ullrich


From bockman at virgilio.it  Mon May 19 15:02:33 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Mon, 19 May 2008 21:02:33 +0200
Subject: ftplib returns EOFError
References: <mailman.1340.1211196486.12834.python-list@python.org>
Message-ID: <pan.2008.05.19.19.02.29.689174@virgilio.it>

On Mon, 19 May 2008 13:27:23 +0100, Jon Bowlas wrote:

> Hi All,
> 
> I've written a little method to connect to an ftpserver which works well,
> however when I send a file using this ftp connection oddly I _sometimes_ get
> returned an EOFError from ftplib.getline even though my file is actually
> transferred. 
> 
> Here's my script:
> 
>     def uploadViaFtp(self, file, filename):
>         '''A method to upload a file via ftp'''
>         ftpserverloc = self.getItunesUftpServer()
>         ftpserverusername = self.getItunesUftpUser()
>         ftpserverpassword = self.getItunesUftpPsswd()
>         ftp = ftplib.FTP(ftpserverloc)
>         ftp.login(ftpserverusername, ftpserverpassword)
>         try:
>             ftp.storbinary("STOR " + filename, file, 1024)
>         finally:
>             file.close()
>         ftp.quit()
> 
> 
> And here's the traceback:
> Traceback (innermost last):
>   Module ZPublisher.Publish, line 114, in publish
>   Module ZPublisher.mapply, line 88, in mapply
>   Module ZPublisher.Publish, line 40, in call_object
>   Module Products.FileSystemSite.FSPythonScript, line 108, in __call__
>   Module Shared.DC.Scripts.Bindings, line 311, in __call__
>   Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
>   Module Products.FileSystemSite.FSPythonScript, line 164, in _exec
>   Module None, line 28, in upload_submit
>    - <FSPythonScript at
> /silva/service_views/UCLItunesUPodcast/edit/Asset/UCLItunesUTrack/upload_sub
> mit>
>    - Line 28
>   Module Products.UCLItunesUPodcast.UCLItunesUService, line 138, in
> uploadViaFtp
>   Module ftplib, line 523, in quit
>   Module ftplib, line 246, in voidcmd
>   Module ftplib, line 221, in voidresp
>   Module ftplib, line 207, in getresp
>   Module ftplib, line 193, in getmultiline
>   Module ftplib, line 183, in getline
> EOFError
> 
> 
> Any help in catching and ignoring this error would be greatly appreciated.
> 
> Regards
> 
> Jon

ftp.quit() attempts to send a quit command and wait for the response
before closing. Apparently, sometime the connection is already closed
(don't know why) and you get the exception.

I guess you could do something like this:

 try:
	ftp.quit()
 except EOFError:
       ftp.close()


Ciao
-----
FB


From apardon at forel.vub.ac.be  Thu May 22 05:46:23 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 22 May 2008 09:46:23 GMT
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<69imp0F33sdj6U1@mid.uni-berlin.de>
Message-ID: <slrng3ag7e.2u6.apardon@rcpc42.vub.ac.be>

On 2008-05-21, Diez B. Roggisch <deets at nospam.web.de> wrote:
> boblatest at googlemail.com wrote:
>
>> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> 
>>> Although that solution is pretty, it is not the canonical solution
>>> because it doesn't cover the important case of "if" bodies needing to
>>> access common variables in the enclosing scope.  (This will be easier
>>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>>> IMHO closer to a canonical solution to this FAQ.
>> 
>> Hello everybody,
>> 
>> thanks for the various answers. I'm actually pretty puzzled because I
>> expected to see some obvious solution that I just hadn't found before.
>> In general I find Python more elegant and syntactically richer than C
>> (that's where I come from), so I didn't expect the solutions to be a
>> lot more verbose and/or ugly (no offense) than the original idea which
>> would have worked if Python's assignment statement would double as
>> expression, as in C.
>
> Well, it's a design-decision - and I'm pretty ok with it being a bit verbose
> here - as it prevents a *great* deal of programming errors that would
> otherwise happen from accidentally writing a = b where a == b was meant.

But that is an error that occurs because of the specific symbols chosen
to represent an assignment or equality test. At the time python was
first designed, other symbols for assignment were already used for
in other languages, like := and <-

So if preventing errors was the main motivation why not allow an
assignment to be an expression but use a symbol for the assignment
that would prevent those kind of errors?

I find it hard to believe that a design choice like whether or not
to have the assignment behave as an expression or not, was decided
on the ground of a particulare lexical representation of the assignment
symbol.

-- 
Antoon Pardon


From inhahe at gmail.com  Fri May 23 15:44:03 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:44:03 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<7xk5hll2hz.fsf@ruckus.brouhaha.com>
Message-ID: <s7FZj.19192$255.11799@bignews8.bellsouth.net>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xk5hll2hz.fsf at ruckus.brouhaha.com...
> "inhahe" <inhahe at gmail.com> writes:
>> planets are spherical (all implementations of Python are not natively
>> compiled (and you said for whatever definition)), and b) It's a far cry 
>> to
>> imagine a planet coming into being that's not spherical (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
> There are native Python compilers, see psyco and pypy.

That does complicate the question since there are 4 levels of executing code

interpreted
bytecode-compiled-interpreted
jit-complied
natively compiled

i've tried psyco a few times and never noticed much of a speed increase.  if 
any.
and then on the other hand, .net is supposed to be almost as fast as C 
because of its JIT. but the whole issue of the speed of .net seems to be 
enshrouded in mystery, so who knows.





From deets at nospam.web.de  Mon May 19 09:40:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 15:40:16 +0200
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <69deb2F31deqmU1@mid.uni-berlin.de>

Roel Schroeven wrote:

> Bruno Desthuilliers schreef:
>> 1/ being interpreted or compiled (for whatever definition of these
>> terms) is not a property of a language, but a property of an
>> implementation of a language.
>> 
>> 2/ actually, all known Python implementations compile to byte-code.
>> 
> 
> You keep saying that, and in theory you're right. But I'm still inclined
> to disagree with it, since the practical reality is different. Python is
> indeed compiled to byte code, but if you compare that byte code with
> assembly code you'll see that there's a whole world of difference
> between the two, largely because of the dynamical nature of Python. Fact
> is that Python was designed from the start to run on a virtual machine,
> not on the native hardware.
> 
> C OTOH was designed to be compiled to assembly code (or directly to
> machine code) and as a result there are no (or virtually) no
> implementations that interpret C or compile it to bytecode.
> 
> I love Python, but IMHO it's a bit silly to maintain that the fact that
> Python compiles to byte code instead of assembly code/machine code is
> purely a matter of implementation; on the contrary, I believe it's a
> result of its design. I also think that there's a large difference
> between byte code and machine code (in Python's case; I haven't looked
> at other languages), and that it's a bit silly to try to trivialize that
> difference.

I strongly disagree. See the Java which is compiled to bytecode
*explicitly*, jet the JVM-bytecode is closer to Python than to what C++ is
compiled to. But then, it's possible to have JIT-compilers that bring
machine code back into the picture.

And see python + psyco as JIT. 

And OTOH see Objective-C and it's runtime for an example of a
machine-code-compiled language that still has huge dynamic runtime parts. 

All these blur the image extremely and make Bruno's point: compilation is an
artifact, not some inherent property of a language.

Diez




From gneuner2/ at /comcast.net  Thu May  8 01:05:34 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Thu, 08 May 2008 01:05:34 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>

On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
<xahlee at gmail.com> wrote:

>I'd like to introduce a blog post by Stephen Wolfram, on the design
>process of Mathematica. In particular, he touches on the importance of
>naming of functions.
>
>? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
>Wolfram
> http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/
>
>The issue is fitting here today, in our discussion of ?closure?
>terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
>meaning space vs single-meaning space), ?tail recursion?, ?currying?,
>?lambda?, that perennially crop up here and elsewhere in computer
>language forums in wild misunderstanding and brouhaha.
>
>The functions in Mathematica, are usually very well-name, in contrast
>to most other computing languages. In particular, the naming in
>Mathematica, as Stephen Wolfram implied in his blog above, takes the
>perspective of naming by capturing the essense, or mathematical
>essence, of the keyword in question. (as opposed to, naming it
>according to convention, which often came from historical happenings)
>When a thing is well-named from the perspective of what it actually
>?mathematically? is, as opposed to historical developments, it avoids
>vast amount of potential confusion.
>
>Let me give a few example.
>
>? ?lambda?, widely used as a keyword in functional languages, is named
>just ?Function? in Mathematica. The ?lambda? happend to be called so
>in the field of symbolic logic, is due to use of the greek letter
>lambda ??? by happenstance. The word does not convey what it means.
>While, the name ?Function?, stands for the mathematical concept of
>?function? as is.

Lambda is not a function - it is a function constructor.   A better
name for it might be MAKE-FUNCTION.  

I (and probably anyone else you might ask) will agree that the term
"lambda" is not indicative of it's meaning, but it's meaning is not
synonymous with "function" as you suggest.

I suspect Mathematica of just following historical convention itself.
Mathematica uses the term inappropriately just as it was (ab)used in
Pascal (circa 1970).  I'm not aware of earlier (ab)uses but there
probably were some.


>? Module, Block, in Mathematica is in lisp's various ?let*?. The
>lisp's keywords ?let?, is based on the English word ?let?. That word
>is one of the English word with multitudes of meanings. If you look up
>its definition in a dictionary, you'll see that it means many
>disparate things. One of them, as in ?let's go?, has the meaning of
>?permit; to cause to; allow?. This meaning is rather vague from a
>mathematical sense. Mathematica's choice of Module, Block, is based on
>the idea that it builds a self-contained segment of code. (however,
>the choice of Block as keyword here isn't perfect, since the word also
>has meanings like ?obstruct; jam?)

"Let" is the preferred mathematical term for introducing a variable.
Lisp uses it in that meaning.  What a word means or doesn't in English
is not particularly relevant to its use in another language.  There
are many instances of two human languages using identical looking
words with very different meanings.  Why should computer languages be
immune?


>? Functions that takes elements out of list are variously named First,
>Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
>opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
>?unshift?, in lisps and perl and other langs.

Lisp has "first" and "rest" - which are just synonyms for "car" and
"cdr".  Older programmers typically prefer car and cdr for historical
reasons, but few object to the use of first and rest except for
semantic reasons - Lisp does not have a list data type, lists are
aggregates constructed from a primitive pair data type.  Pairs can be
used to construct trees as well as lists and "rest" has little meaning
for a tree.  When used with lists, first and rest are meaningful terms
and no one will object to them.

Besides which, you easily create synonyms for car and cdr (and
virtually any other Lisp function) with no more burden on the reader
of your code than using a C macro.  You can call them "first and
rest", or "first and second", or "left and right", or "red and black"
or whatever else makes sense for your data.

People coming to Lisp from other languages often complain of macros
that they have to learn "a new language" every time they read a
program.  But in fact, the same is true in all languages - the reader
always has to learn the user-defined functions and how they are used
to make sense of the code.  In that sense Lisp is no different from
any other language.

Common Lisp doesn't have "filter".  Even so, with respect to the
merits of calling a function "extract" or "select" versus "filter", I
think that's just a matter of familiarity.  The term "filter" conveys
a more general idea than the others and can, by parameterization,
perform either function.


>The above are some examples. The thing to note is that, Mathematica's
>choices are often such that the word stands for the meaning themselves
>in some logical and independent way as much as possible, without
>having dependent on a particular computer science field's context or
>history. One easy way to confirm this, is taking a keyword and ask a
>wide audience, who doesn't know about the language or even unfamiliar
>of computer programing, to guess what it means. The wide audience can
>be made up of mathematicians, scientists, engineers, programers,
>laymen. This general audience, are more likely to guess correctly what
>Mathematica's keyword is meant in the language, than the the name used
>in other computer languages who's naming choices goes by convention or
>context.
>
>(for example, Perl's naming heavily relies on unix culture (grep,
>pipe, hash...), while functional lang's namings are typically heavily
>based on the field of mathematical logic (e.g. lambda, currying,
>closure, monad, ...). Lisp's cons, car, cdr, are based on computer
>hardware (this particular naming, caused a major damage to the lisp
>language to this day). (Other examples: pop, shift are based on
>computer science jargon of ?stack?. Grep is from Global Regular
>Expression Print, while Regular Expression is from theoretical
>computer science of Automata... The name regex has done major hidden
>damage to the computing industry, in the sense that if it have just
>called it ?string patterns?, then a lot explanations, literatures,
>confusions, would have been avoided.))
>
>(Note: Keywords or functions in Mathematica are not necessarily always
>best named. Nor are there always one absolute choice as best, as there
>are many other considerations, such as the force of wide existing
>convention, the context where the function are used, brevity,
>limitations of English language, different scientific context (e.g.
>math, physics, engineering), or even human preferences.)
>
>----------------------------
>
>Many of the issues regarding the importance and effects of
>terminology's quality, i've wrote about since about 2000. Here are the
>relevant essays:
>
>? Jargons of Info Tech Industry
> http://xahlee.org/UnixResource_dir/writ/jargons.html
>
>? The Jargon ?Lisp1? vs ?Lisp2?
> http://xahlee.org/emacs/lisp1_vs_lisp2.html
>
>? The Term Curring In Computer Science
> http://xahlee.org/UnixResource_dir/writ/currying.html
>
>? What Is Closure In A Programing Language
> http://xahlee.org/UnixResource_dir/writ/closure.html
>
>? What are OOP's Jargons and Complexities
> http://xahlee.org/Periodic_dosage_dir/t2/oop.html
>
>? Sun Microsystem's abuse of term ?API? and ?Interface?
> http://xahlee.org/java-a-day/interface.html
>
>? Math Terminology and Naming of Things
> http://xahlee.org/cmaci/notation/math_namings.html
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/
>
>?

George
--
for email reply remove "/" from address


From castironpi at gmail.com  Mon May  5 13:08:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 10:08:29 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<8987552e-f462-4465-8338-d856017a4020@b1g2000hsg.googlegroups.com> 
	<mailman.570.1209965348.12834.python-list@python.org>
Message-ID: <cb676096-0f5e-4e91-9b24-cbb80c9e429f@f63g2000hsf.googlegroups.com>

On May 5, 12:28?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 05 May 2008 00:09:02 -0300, hdante <hda... at gmail.com> escribi?:
>
>
>
>
>
> > ?Isn't this guy a bot ? :-) It's learning fast. I believe there is a
> > "frame" in C, composed of its stack and globals. For generators in C,
> > you may look for "coroutines". For example, see:
>
> >http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
>
> > ?A sample code follows:
>
> > #define crBegin static int state=0; switch(state) { case 0:
> > #define crReturn(i,x) do { state=i; return x; case i:; } while (0)
> > #define crFinish }
> > int function(void) {
> > ? ? static int i;
> > ? ? crBegin;
> > ? ? for (i = 0; i < 10; i++)
> > ? ? ? ? crReturn(1, i);
> > ? ? crFinish;
> > }
>
> > ?The "suspended state" is saved in the static variable. It's not
> > necessary to save the complete "frame", only the suspended state.
>
> Quoting the author himself, "this is the worst piece of C hackery ever seen"
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

At some point, code goes "on" and "off" the processor, which knowledge
I do owe to spending money.  Thus, if the group news is a localcy
(other dimension of currency), that's bounce check the house dollar.
What do [second person plural] spend on [vernacular]?

More strictly speaking, processor freely goes on and off binaries.  Is
Goto a hardware instruction?  Perhaps a Linux-Python-binding could
yield a frame, pun intended.  Do [you] have access the file system?

Could yield merely be implemented as multiple strings of processses?
Get the variables on disk.  Question is, is it worth optimizing away
from flash rom?  There's a gig of chips in a bowling ball.




From __peter__ at web.de  Sun May 18 15:30:57 2008
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 May 2008 21:30:57 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <g0q05b$f3r$03$1@news.t-online.com>

Matt Porter wrote:

> I'm trying to compress a string.
> E.g:
>   "AAAABBBC" -> "ABC"

Two more:

>>> from itertools import groupby
>>> "".join(k for k, g in groupby("aaaaaabbbbbbbbbbcccccc"))
'abc'

>>> import re
>>> re.compile(r"(.)\1*").sub(r"\1", "aaaaaaabbbbcccccccc")
'abc'

Peter


From vadim.pestovnikov at gmail.com  Thu May  1 10:32:57 2008
From: vadim.pestovnikov at gmail.com (idev)
Date: Thu, 1 May 2008 07:32:57 -0700 (PDT)
Subject: Please help me with linking libraries on Solaris 10 sparc
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819d093$0$6552$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <91a8146e-507d-4dc9-ac47-1cff54f541f2@y38g2000hsy.googlegroups.com>

On May 1, 10:17 am, Ralf Sch?nian <r... at schoenian-online.de> wrote:
> idev schrieb:
>
>
>
> > Hi all,
> > Please help me with my stuff.
>
> > I downloaded python 2.5.1 package fromhttp://blastwave.orgit was
> > compiled using Sun Studio 11 for Solaris 8 sparc.
>
> > My system is Solaris 10 sparc and I compiled using SunStudio 11
> > psycopg2 python binding for PostgreSQL 8.3.1.
>
> > Compilation was OK, but when I am trying to import psycopg2 I am
> > getting this error:
>
> > $ python
> > Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> import psycopg2
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
> > 60, in <module>
> >     from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
> > ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
> > lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> > referenced symbol not found
>
> > Any suggestions or help will be appreciated.
>
> Hi,
>
> maybe a stupid question - but why don't you want to use the "official"
> package? You can download it here:http://sunfreeware.mirrors.tds.net/indexsparc10.html
>
> Regards,
> Ralf

I am trying to deploy Django env (apache2.x prefork MPM; mod_python
3.3.1; python 2.5.1; postgresql 8.3.x; psycopg2-2.0.7; subversion
1.4.5.x; openssl 0.98;) on Solaris 10 sparc box.
You are right they have pretty much everything what I need except
mod_python and psycopg2. So the first problem was PostgreSQL. It was
compiled without (--with-thread-safety) just ./configure. I compiled
psycopg2 by myself using gcc but I couldn't compile mod_pyhon by some
reasons. That is why I switched to blastwave.org they have everything
what I need except psycopg2. I compiled it by my self. And now I am
having the ld problems and I don't know how to resolve it.


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From castironpi at gmail.com  Tue May 13 06:45:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:45:17 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <d70fafc7-ec53-472d-8f5d-604740fa64e8@f63g2000hsf.googlegroups.com>

On May 13, 5:28?am, dannywebs... at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
>
> so far:
>
> >>> f=os.open("./get_hostnames").readlines
>
> returns ['host1 host2 host3 ... hostN\n]'
>
> i'd like to be in a position to iterate through these, grabbing each
> host. ?I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
>
> >>> f=str(f)
> >>> f.split()
>
> ["['host1","host2", ... ,"hostN\n']"]
>
> Any help is highly appreciated
>
> ta
>
> dan.

Bring up the Google Ring.  Where you only wiggle fingers, it might pay
to get jobs at home.  All we up here would have to do would be
schedule something.  Make a decision is easy in talking.  I think it
would be easy to centralize the time the world's at and redistribute
money.  If all we'd do is normal life, this constrained, open markets
would be easy to set up.  It's just illegal to talk about pricing in
2004 Microecon. classes.


From pavlovevidence at gmail.com  Thu May  1 12:45:28 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 09:45:28 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
Message-ID: <790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>

On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> > IMO .ini-like config files are from the stone age. The modern approach is
> > to use YAML (http://www.yaml.org).
>
> You mean YAML isn't a joke!? It's so ludicrously overcomplicated,
> and so comprehensively and completely fails to achieve its stated
> main goal of being "readable by humans", that I had assumed it
> was an April Fool along the lines of Intercal or brainf***.


YAML, ISTM, took a simple concept that worked for small,
straightforward data, and tried to make into a format that could
anything anywhere, with disastrous results.  It's not unlike Perl in
this regard.  It's quite ridiculous.


My recommendation to the OP would be:

If you intend to write a GUI that completely sets all the options, use
XML.  You can bet there are some users who would prefer text editing
options files, and XML, while not the most readable format available,
at least gives users the option.

If you don't intend to write a GUI to do that, write a simple text
file parser (if the options are simple), use ConfigParser, or use a
Python file that you exec.

Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
ApplicationData/Appname/config.ext on Windows.  I don't recommend
using the Windows registry to store options; use it to modify Windows
behavior (like file associations) but keep your own program's options
in your own file.


Carl Banks


From carsten.haese at gmail.com  Thu May  1 23:46:37 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Thu, 01 May 2008 23:46:37 -0400
Subject: help with list comprehension
In-Reply-To: <WtvSj.108013$Cj7.100899@pd7urf2no>
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
Message-ID: <x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>

Yves Dorfsman wrote:
> 
> In the following script, m1() and m2() work fine. I am assuming m2() is 
> faster although I haven't checked that (loops through the list twice 
> instead of once).

Well, let's check it:

$ python -m timeit -s "import x" "x.m1()"
100000 loops, best of 3: 6.43 usec per loop

$ python -m timeit -s "import x" "x.m2()"
100000 loops, best of 3: 8.34 usec per loop

As it turns out, m1 is faster than m2. The reason is that list 
comprehensions do the loop in C, whereas the for-append pattern does the 
loop on the Python level.

> Now what I am trying to do is something like m3(). As currently written 
> it does not work, and I have tried different ways, but I haven't managed 
> to make it work.
> 
> Is there a possibility ? Or is m2() the optimum ?
> 
> [...] 
> def m1():
>   colours = [ e['colour'] for e in l ]
>   nums    = [ e['num']    for e in l ]
> 
> def m2():
>   colours = []
>   nums    = []
>   for e in l:
>     colours.append(e['colour'])
>     nums.append(e['num'])
> 
> #def m3():
> #  colours, nums = [ e['colour'], e['num'] for e in l ]

m3 doesn't work because you're building a list of 10 color/number pairs 
that you're trying to unpack that into just two names. The working 
"derivative" of m3 is m1, which is the most natural, fastest and 
clearest solution to your problem.

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From wizzardx at gmail.com  Sun May  4 03:54:14 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 09:54:14 +0200
Subject: generator functions in another language
In-Reply-To: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
Message-ID: <18c1e6480805040054s44c8d050h7449a4c3848bdc81@mail.gmail.com>

On Sun, May 4, 2008 at 1:39 AM,  <castironpi at gmail.com> wrote:
> I'm actually curious if there's a way to write a generator function
>  (not a generator expression) in C, or what the simplest way to do it
>  is... besides link the Python run-time.
>  --

Here's the itertools C code:

http://svn.python.org/view/python/trunk/Modules/itertoolsmodule.c?rev=61634&view=markup

David.


From yhvh2000 at googlemail.com  Fri May  9 06:01:22 2008
From: yhvh2000 at googlemail.com (yhvh)
Date: Fri, 9 May 2008 03:01:22 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
	<c45e0065-0ceb-4f72-b267-c63fb128962d@p25g2000pri.googlegroups.com>
Message-ID: <ff55f5e6-467a-4d86-9493-1f3a7fa3f060@m45g2000hsb.googlegroups.com>

> > x = [0010, 0210]
>
> You do realize that this is octal, right?
It's unfortunate I choose that, the numbers go beyond octal

> len is undefined for integers. ?Perhaps you meant "len(str(x[1]))".
Yes sorry it was late at night :P


> You can, however, do this:
> >>> '%0*d' % (5, 123)
> '00123'

This is exactly what I needed Thank-you kindly


From s0suk3 at gmail.com  Wed May 28 04:59:19 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Wed, 28 May 2008 01:59:19 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
Message-ID: <3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>

On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
> s0s... at gmail.com wrote:
> > I wanted to ask for ways to test whether a path exists. I usually use
> > os.path.exists(), which does a stat call on the path and returns True
> > if it succeeds, or False if it fails (catches os.error). But stat
> > calls don't fail only when a path doesn't exist. I see that, at least
> > on Windows, the instance of the exception has an attribute 'errno' set
> > to 2 when it fails because the path doesn't exist. Is it a portable
> > solution to rely on this (haven't tried it on Linux)? Are there other
> > ways of testing whether a path exists?
>
> > Thanks,
> > Sebastian
>
> "import errno" and see if the exception's errno attribute is set to
> errno.ENOENT (which is, yes, 2). It is portable.
>
> If you Google [ENOENT Windows] or whatever, there are some differences
> on different platforms, but not many.

Thanks. So if OSError().errno == errno.ENOENT, then it means the path
doesn't exist? (What does "ENOENT" stan for?)


From deets at nospam.web.de  Sat May 24 13:19:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 May 2008 19:19:30 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <48382917$0$20800$426a74cc@news.free.fr>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
Message-ID: <69r113F34rbeeU1@mid.uni-berlin.de>

kib schrieb:
> Diez B. Roggisch a ?crit :
>> Tool69 schrieb:
>>> Hi,
>>>
>>> Until now, I was running my own static site with Python, but I'm in
>>> need of dynamism.
>>>
>>> After reading some cgi tutorials, I saw Joe Gregorio's old article
>>> "Why so many Python web frameworks?" about wsgi apps [http://
>>> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
>>> question about it. The code he gave works like a charm (I had to make
>>> a little change because SQLAlchemy has changed since), but how the
>>> hell can I serve static files (css, js, images, etc.) within an wsgi
>>> app, ie inside a '/static' directory ?!
>>
>> There is a wsgi-app out there that is called "static". Use that.
>>
>> And it's the first hit on google "wsgi static"... :)
>>
>> http://lukearno.com/projects/static/
>>
>> Diez
> 
> Hi Diez,
> 
> and thanks for yout help. In fact I already found it but never managed 
> to get it work because the static doc says :
> 
> from wsgiref.simple_server import make_server
> import static
> make_server('localhost', 9999, static.Cling('/var/www')).serve_forever()
> 
> and inside J.Gregorio's tutorial it is:
> 
> from wsgiref.simple_server import WSGIServer, WSGIRequestHandler
> httpd = WSGIServer(('localhost', 8080), WSGIRequestHandler)
> httpd.set_app(urls.urls)
> 
> It does not use 'make_server()' so how can I adapt it ?

static.Cling is a wsgi-app. The other code just makes a specific 
wsgi-implementation based server out of it.


> I finally managed to work with static files with a little hack, but it's 
> ugly because I'm reading each static file per request.

How else should that work? Apache does that the same way.

Diez


From lists at cheimes.de  Thu May  1 13:55:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 19:55:21 +0200
Subject: Problems with Cheese Shop
In-Reply-To: <87zlr9vry8.fsf@physik.rwth-aachen.de>
References: <87zlr9vry8.fsf@physik.rwth-aachen.de>
Message-ID: <481A0409.6040706@cheimes.de>

Torsten Bronger schrieb:
> Hall?chen!
> 
> How can I authorise to the Python Cheese Shop in order to use
> setup.py upload?  Currently, I get
> 
> Upload failed (401): You must be identified to edit package information

Try "python setup.py register sdist upload"

Christian



From castironpi at gmail.com  Tue May 13 06:59:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 03:59:56 -0700 (PDT)
Subject: The 'is' identity operator checking immutable values caution
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
	<mailman.1038.1210675085.12834.python-list@python.org>
Message-ID: <b2f9fb65-b989-4c28-b7c5-9909961ad555@m73g2000hsh.googlegroups.com>

On May 13, 5:37?am, Christian Heimes <li... at cheimes.de> wrote:
> wxPytho... at gmail.com schrieb:
>
> > We have to avoid the use of the 'is' identity operator with basic,
> > immutable values such as numbers and strings. The result is
> > unpredictable because of the way Python handles these objects
> > internally.
>
> You are confusing immutable objects with singletons. Never use "is" with
> strings and numbers.
>
> Christian

I was back on 'handle'.  Handle internally, handle right.  Gotta be 6
a.m.


From castironpi at gmail.com  Wed May  7 20:11:14 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 17:11:14 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<e6d6a7d8-f333-4459-a3b4-f577f932a0a9@a23g2000hsc.googlegroups.com> 
	<35e4c5fb-d09f-492d-a165-f03be93ff465@8g2000hse.googlegroups.com>
Message-ID: <9bbbeed6-6be1-4261-8a68-c6b91a424f85@s50g2000hsb.googlegroups.com>

On May 7, 5:27?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 7 mai, 23:51, "bruno.desthuilli... at gmail.com"<bruno.desthuilli... at gmail.com> wrote:
>
> (snip)
>
> Small improvement thanks to Paul Rubin:
>
> from collections import defaultdict
> from operator import itemgetter
>
> def get_letters_frequency(source):
> ? ? letters_count = defaultdict(int)
> ? ? for letter in source:
> ? ? ? ? letters_count[letter] += 1
> ? ? ? return sorted(
> ? ? ? ? ? letters_count.iteritems(),
> ? ? ? ? ? key=itemgetter(1),
> ? ? ? ? ? reverse=True
> ? ? ? ?)

I have a bounce on mostfreq("abbcccddddeeeeeffffff").  It's more
useful when it runs in real time, i.e. persists.  Can I write database
code on time in a pickle?

serial= depickle( uniqueA )
serial.append( "a" )
repickle( uniqueA, serial )

I have to keep control during three ops.


From arnodel at googlemail.com  Wed May 28 02:43:30 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 07:43:30 +0100
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<0ea08237-c9f9-441b-a744-7410114b5ae9@t54g2000hsg.googlegroups.com>
	<Is__j.39066$dq6.8748@en-nntp-09.dc1.easynews.com>
Message-ID: <m2skw33p4d.fsf@googlemail.com>

"Joel Koltner" <zapwireDASHgroups at yahoo.com> writes:

> "Paul Hankin" <paul.hankin at gmail.com> wrote in message 
> news:0ea08237-c9f9-441b-a744-7410114b5ae9 at t54g2000hsg.googlegroups.com...
> "Did you actually write self,args = args?"
>
> (looks at source code)
>
> $#@#%#$  Why, yes, yes I did!  Thanks for catching that...

This is odd, because you should get this error even if writing
self.args=args, witness this copy-paste from the interactive prompt:

>>> class MyError(Exception):
...     def __init__(self, args=None):
...         self.args = args
... 
>>> MyError()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in __init__
TypeError: 'NoneType' object is not iterable

-- 
Arnaud


From jstucklex at attglobal.net  Wed May 28 12:58:23 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Wed, 28 May 2008 12:58:23 -0400
Subject: php vs python
In-Reply-To: <298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
Message-ID: <naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>

cokofreedom at gmail.com wrote:
> On May 28, 1:42 pm, Michael Fesser <neti... at gmx.de> wrote:
>> .oO(Ivan Illarionov)
>>
>>> No. Language does matter.
>> And the weather.
>>
>> If you know how to program, you can write good code in any language if
>> you're familiar enough with it. Many people write good code in PHP, and
>> many write total crap in C/C++. It's almost never about the language,
>> but about the programmer.
>>
>> Micha
> 
> I'd like to see someone coming from an OO programming background write
> good Haskell, Pure Functional Programming code even with a high level
> of OO experience. Language matters.

Actually, I think it would be easier than a functional programmer 
converting to an OO paradigm.

And the caveat was *if you're familiar enough with it*.

A good OO programmer could easily write good functional code.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From kenneth.m.mcdonald at sbcglobal.net  Sat May 10 01:20:33 2008
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 10 May 2008 00:20:33 -0500
Subject: People still using Tkinter?
Message-ID: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>

Any guesses as to how many people are still using Tkinter? And can  
anyone direct me to good, current docs for Tkinter?

Thanks,
Ken


From bj_666 at gmx.net  Tue May 20 03:05:20 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 07:05:20 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
Message-ID: <69fbhgF2uih6aU5@mid.uni-berlin.de>

On Tue, 20 May 2008 13:57:26 +1000, James A. Donald wrote:

> The larger the program, the greater the likelihood of inadvertent name
> collisions creating rare and irreproducible interactions between
> different and supposedly independent parts of the program that each
> work fine on their own, and supposedly cannot possibly interact.

How should such collisions happen?  You don't throw all your names into
the same namespace!?

Ciao,
	Marc 'BlackJack' Rintsch


From parydacaheh48 at hotmail.com  Sat May 17 20:09:00 2008
From: parydacaheh48 at hotmail.com (parydacaheh48)
Date: Sat, 17 May 2008 20:09:00 -0400
Subject: We have the best watch copies on the web
Message-ID: <BLU106-DAV13041A9406AC055BDD7043BBCA0@phx.gbl>

We have the most detailed Copies

All the expensive brands

http://pyfanihavib20.blogspot.com




From wizzardx at gmail.com  Sat May 24 16:17:21 2008
From: wizzardx at gmail.com (David)
Date: Sat, 24 May 2008 22:17:21 +0200
Subject: Code correctness, and testing strategies
In-Reply-To: <Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
Message-ID: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>

>> In order to get a new system working, it's nice to be able to throw
>> together a set of modules quickly, and if that doesn't work, scrap it
>> and try something else. There's a rule (forget where) that your first
>> system will always be a prototype, regardless of intent.
>
> That's fine. It's alright to prototype without tests. The only rule is that
> you cannot then use any of that code in production.
>

So, at what point do you start writing unit tests? Do you decide:
"Version 1 I am going to definitely throw away and not put it into
production, but version 2 will definitely go into production, so I
will start it with TDD?".

Where this doesn't work so well is if version 2 is a refactored and
incrementally-improved version of version 1. At some point you need to
decide "this is close to the version that will be in production, so
let's go back and write unit tests for all the existing code".

>> Problem 3: Slows down development in general
>>
>> Having to write tests for all code takes time. Instead of eg: 10 hours
>> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
>> writing all the tests, and 10 on the code.
>>
> You are either a very slow coder or a very poor tester: there should be a
> lot more than 1/2 hour testing for 10 hours coding. I would say the
> comparison might be 10 hours coding, 10 hours testing, then about a week
> tracking down the bugs which escaped testing and got out to the customers.
> With proper unit tests you will reduce all 3 of these numbers but
> especially the last one. Any bug which gets away from the programmer and is
> only caught further downstream costs vastly more than bugs caught during
> development, and not just for the programmer but everyone else who
> affected.

Seriously, 10 hours of testing for code developed in 10 hours? What
kind of environment do you write code for? This may be practical for
large companies with hordes of full-time testing & QA staff, but not
for small companies with just a handful of developers (and where you
need to borrow somone from their regular job to do non-developer
testing). In a small company, programmers do the lions share of
testing. For programmers to spend 2 weeks on a project, and then
another 2 weeks testing it is not very practical when they have more
than one project.

As for your other points - agreed, bugs getting to the customer is not
a good thing. But depending on various factors, it may not be the end
of the world if they do. eg: There are many thousands of bugs in open
source bug trackers, but people still use open source for important
things. Sometimes it is better to have software with a few bugs, than
no software (or very expensive, or very long time in development). See
"Worse is Better": http://en.wikipedia.org/wiki/Worse_is_better. See
also: Microsoft ;-)

>
> You seem to think that people are suggesting you write all the tests up
> front: what you should be doing is interleaving design+testing+coding all
> together. That makes it impossible to account for test time separately as
> the test time is tightly mixed with other coding, what you can be sure
> though is that after an initial slowdown while you get used to the process
> your overall productivity will be higher.

Sounds like you are suggesting that I obfuscate my development process
so noone can tell how much time I spent doing what :-)

I think that moderate amounts of unit tests can be beneficial and not
slow down development significantly (similar to a bit more time spent
using version control vs not using it at all). Regression tests is a
good example. But going to the TDD extreme of always coding tests
before *any* code, for *all* projects, does not sit well with me (bad
analogy: similar to wasting time checking in each line into version
control separately, with a paragraph of comments).

>
> The first time you make a change to some code and a test which is
> apparently completely unrelated to the change you made breaks is the point
> when you realise that you have just saved yourself hours of debugging when
> that bug would have surfaced weeks later.
>

The next time your project is running late, your manager and the
customer will be upset if you spend time updating your unit tests
rather than finishing off the project (and handing it over to QA etc)
and adding the unit tests when there's actually time for it.

>> Clients, deadlines, etc require actual software, not
>> tests for software (that couldn't be completed on time because you
>> spent too much time writing tests first ;-)).
>
> Clients generally require *working* software. Unfortunately it is all too
> easy to ship something broken because then you can claim you completed the
> coding on time and any slippage gets lost in the next 5 years of
> maintenance.

That's why you have human testing & QA. Unit tests can help, but they
are a poor substitute. If the customer is happy with the first
version, you can improve it, fix bugs, and add more unit tests later.

David

PS: To people following this thread: I don't mean to be argumentative.
This is a subject I find interesting and I enjoy the debate. I'm
playing devil's advocate (troll?) to provoke further discussion.


From tinnews at isbd.co.uk  Sun May 11 06:36:31 2008
From: tinnews at isbd.co.uk (tinnews at isbd.co.uk)
Date: 11 May 2008 10:36:31 GMT
Subject: How to uninstall something installed by "setup.py install"?
Message-ID: <4826cc2f$0$655$bed64819@news.gradwell.net>

I have installed a development version of rdiff-backup using its
"setup.py install" but now find I need to uninstall it.  Is there any
'easy' way to do this and/or can I find out what files it has
installed where so I can remove them?

-- 
Chris Green


From hdante at gmail.com  Tue May  6 13:43:22 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 10:43:22 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <7d8db79a-1018-46e9-8474-684bea2ed993@2g2000hsn.googlegroups.com>

On May 6, 12:09?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> On May 6, 10:26?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-06, jmDesktop <needin4mat... at gmail.com> wrote:
>
> > > Studying OOP and noticed that Python does not have Interfaces. ?Is
> > > that correct? ?Is my schooling for nought on these OOP concepts if I
>
> > Depends on your definition of 'Python does not have Interfaces'. They are not
> > in the official language, but they do exist. look into zope.interfaces, athttp://www.zope.org/Products/ZopeInterface.
>
> > > use Python. ?Am I losing something if I don't use the "typical" oop
> > > constructs found in other languages (Java, C# come to mind.) ?I'm
>
> > I think you are still thinking with a Java mind-set (no idea about C#, never
> > programmed with it).
>
> > Interfaces mainly exist to formalize TO A COMPILER that an object will provide
> > certain stuff. In this way, the compiler can catch such errors at compile time.
>
> > Python on the other hand does very little at compile time (other than parse
> > errors). Instead, at run-time it performs the checks that something you want to
> > use is actually there.
> > (in the same way that you don't declare variables a priori. You simply use them
> > and Python creates them for you when needed).
>
> > As a result, you get much more light-weight, more dynamic, code, which supports
> > the RAD nature of Python what makes it so much more productive.
>
> > (after a few years Python, you may find the Java way of doing things clunky).
>
> > > afraid that if I never use them I'll lose them and when I need them
> > > for something beside Python, I'll be lost. ?Thank you.
>
> > You can continue doing everything exactly in the way you do now. Effectively
> > you would then be programming Java/C# in Python syntax. I believe you would
> > gain very little by that move.
>
> > If you dare let go of your old habits, and embrace the mindset of a new
> > language, you can learn a lot more, namely that programming can be done in many
> > different ways (even if all those ways are called OOP).
> > If you only have a hammer, the whole world looks like a nail. If you have a
> > whole toolbox, problems become much more diverse (subtle). You learn to use
> > the right tools for the right problem, and maybe you find new (better) ways of
> > approaching old problems.
>
> > In the process, you may lose details of how something was done in language X,
> > but that's why they have invented books.
>
> > Sincerely,
> > Albert
>
> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too. ?On the dynamic typing,

 No. When teaching problem solving in the basic programming courses,
the language is irrelevant. You don't even need a computer for that.

> isn't that the same sort of thing that lots of scripting languages
> do? ?VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in
> Classic ASP.) ?I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why. ?Thanks.

 If you want to understand the design decisions behind python, read
its history:
 http://www.artima.com/intv/python.html

 Also, do you have an example of some problem that requires an
interface that you would like to know how it's done in python (or
maybe an explanation of why it's not possible) ?


From pavlovevidence at gmail.com  Sat May 17 01:25:50 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 16 May 2008 22:25:50 -0700 (PDT)
Subject: Classmethods are evil
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <1be510d2-c4ce-45ab-82d6-8135fdd268a6@m3g2000hsc.googlegroups.com>

On May 17, 12:01 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> After re-reading "Python is not Java" I finally came to conclusion that
> classmethods in Python are a very Bad Thing.
>
> I can't see any use-case of them that couldn't be re-written more clearly
> with methods of metaclass or plain functions.

I am probably one of the bigger advocates of metaclasses here, but
given a problem that could equally well be solved by the two I would
choose classmethods every time.  Classmethods are more
straightforward, easier to follow (especially by people who aren't
used to working with metaclasses), and they hinder reusability less.

Classmethods have practical advantages.  One thing you can do with a
classmethod that you can't directly do with a metaclass instancemethod
is to call it with an instance:

 Python 2.5 (r25:51908, Apr 19 2007, 15:29:43)
 [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
 Type "help", "copyright", "credits" or "license" for more
information.
 >>> class A(type):
 ...     def hello(self):
 ...             print "hello"
 ...
 >>> class B(object):
 ...     __metaclass__ = A
 ...     @classmethod
 ...     def world(self):
 ...             print "world"
 ...
 >>> b = B()
 >>> b.world()
 world
 >>> b.hello()
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 AttributeError: 'B' object has no attribute 'hello'

Though I can imagine some people would argue this is an advantage of
metaclasses.


> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place
> making your code a mess.
> 2. They are slower than metaclass methods or plain functions.
>
> I really want to hear your opinions on the subject.

I think neither of these reasons are very compelling.  I don't even
agree with the premise of #1, but even granting that it's messy to do
that, I disagree that the mess would outweigh the drawbacks in
complexity and reusability that a metaclass would bring.  As for #2, I
don't believe "class-level functionality" is often found in bottleneck
situations, so what does it matter what speed it is?


Carl Banks


From wojtek.gminick.walczak at gmail.com  Sun May  4 12:34:04 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Sun, 4 May 2008 18:34:04 +0200
Subject: Determine socket family at runtime
In-Reply-To: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
References: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>
Message-ID: <2c3c21060805040934s10b6953dv31c46d6ff604e88b@mail.gmail.com>

2008/5/4, Giampaolo Rodola' <gnewsg at gmail.com>:
>  For now I've been able to determine the family by using:
>
>  # self.socket = a connected socket.socket instance
>  ip, port = self.socket.getsockname()[0:2]
>  af = socket.getaddrinfo(ip, port)[0][0]
>
>  ...but I'd like to know if some other solution is preferable.

Nope, there is none. Using getaddrinfo() to check address family
is the de facto standard.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From gagsl-py2 at yahoo.com.ar  Wed May 14 01:29:18 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 02:29:18 -0300
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
	<g0d1m4$ng9$1@ger.gmane.org>
Message-ID: <op.ua4pi4ihx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 18:37:10 -0300, Terry Reedy <tjreedy at udel.edu>  
escribi?:

> "Rajarshi" <rajarshi.guha at gmail.com> wrote in message
> news:bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com...
> | Hi, I teach an introductory programming course in Python. As part of
> | the introduction I'd like to highlight the usage of Python in
> | industry. The idea is to show that there are big players using Python
> | for a variety of tasks. Given that the students come from a variety of
> | backgrounds and are not necessarily 'hackers', I'm trying to look for
> | examples with a bit of wow-factor.
>
> Besides the other comments, there was a thread about a month ago that  
> give
> more python success stories (perhaps that was the title).

Yes, this was the thread:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/1bd91aca0c86c57c/

-- 
Gabriel Genellina



From lists at cheimes.de  Fri May  9 05:37:53 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 09 May 2008 11:37:53 +0200
Subject: Free Memory
In-Reply-To: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
References: <8a6035a00805081730g2a18b97cxc32ae6568fb10b81@mail.gmail.com>
Message-ID: <g0161h$lc3$1@ger.gmane.org>

Dark Wind schrieb:
> Hi,
> 
> How can I free all the memory in python by deleting all variables. I am
> looking for the equivalent of 'clear' from Matlab.
> 
> I know del x deletes a variable x, but it doesn't free all the available
> memory.

del doesn't free an object. It only removes one reference to the object.

Christian



From bj_666 at gmx.net  Tue May 27 06:54:05 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 May 2008 10:54:05 GMT
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
Message-ID: <6a27idF32hqrpU3@mid.uni-berlin.de>

On Tue, 27 May 2008 03:01:30 -0700, Magnus.Moraberg wrote:

> I wish to extract all the words on a set of webpages and store them in
> a large dictionary. I then wish to procuce a list with the most common
> words for the language under consideration. So, my code below reads
> the page -
> 
> http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
> 
> a welsh language page. I hope to then establish the 1000 most commonly
> used words in Welsh. The problem I'm having is that
> soup.findAll(text=True) is returning the likes of -
> 
> u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
> www.w3.org/TR/REC-html40/loose.dtd"'

Just extract the text from the body of the document.

body_texts = soup.body(text=True)

> and -
> 
> <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
> 
> Any suggestions how I might overcome this problem?

Ask the BBC to produce HTML that's less buggy.  ;-)

http://validator.w3.org/ reports bugs like "'body' tag not allowed here"
or closing tags without opening ones and so on.

Ciao,
	Marc 'BlackJack' Rintsch


From jcd at sdf.lonestar.org  Sat May 24 19:25:46 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Sat, 24 May 2008 19:25:46 -0400
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01"
	in python coding?
In-Reply-To: <e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
	<g1a5ti$7gm$00$1@news.t-online.com>
	<e48abec7-ada3-4957-9515-0b0659be8d13@u36g2000prf.googlegroups.com>
Message-ID: <1211671546.21932.49.camel@jcd-desktop>

On Sat, 2008-05-24 at 15:59 -0700, zxo102 wrote:
> But this is not "\xED\x6F\x3C\x01".  I need it for
> struct.unpack('f',"\xED\x6F\x3C\x01") to calculate the decimal value
> (IEEE 754).
> Any other suggestions?
> 
> ouyang
> 

In fact it is exactly the same string.  The repr of a string always
substitutes ascii values for their numeric equivalent, but those bytes
are still the underlying representation of the string.

>>> [hex(ord(c)) for c in "\xefo<\x01"]
['0xef', '0x6f', '0x3c', '0x1']

Cheers,
Cliff

> On 5?25?, ??6?46?, Sebastian 'lunar' Wiesner <basti.wies... at gmx.net>
> wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > [ zxo102 <zxo... at gmail.com> ]
> >
> > >    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> > > "\xED\x6F\x3C\x01" in python coding?
> > > When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> > > the error information : invalid \x escape.
> >
> > [1]--> 'ED6F3C01'.decode('hex')
> > Out[1]: '\xedo<\x01'
> >
> > - --
> > Freedom is always the freedom of dissenters.
> >                                       (Rosa Luxemburg)
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v2.0.9 (GNU/Linux)
> >
> > iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
> > YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
> > =jxll
> > -----END PGP SIGNATURE-----
> 
> --
> http://mail.python.org/mailman/listinfo/python-list



From roy at panix.com  Wed May 21 13:38:18 2008
From: roy at panix.com (Roy Smith)
Date: Wed, 21 May 2008 13:38:18 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>
	<iaidnR_ZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
	<roy-6BB9DC.08271421052008@70-1-84-166.area1.spcsdns.net>
	<3KadnXuJQ5VA0qnVRVnyuAA@pipex.net>
Message-ID: <roy-DFD67D.13381721052008@70-1-84-166.area1.spcsdns.net>

In article <3KadnXuJQ5VA0qnVRVnyuAA at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> infact there is no need for any IT phone calls, I am the owner of this 
> network

That's the best way to do it :-)


From davidj411 at gmail.com  Tue May 27 11:44:59 2008
From: davidj411 at gmail.com (davidj411)
Date: Tue, 27 May 2008 08:44:59 -0700 (PDT)
Subject: how to reply to posts on google groups (and not reply to just author)
Message-ID: <b8707517-a5f0-4ed9-ba1d-3a7bacb571f1@2g2000hsn.googlegroups.com>

I want to reply to the goups and not author for  an older post (from
February) , but it seems i can only reply to the author (using google
groups).

 Is there a way (within Google groups) to reply to an older post to
keep that particular thread going instead of posting a new one (as i
am here now doing - sorry about this being a non-python question.)


From lists at cheimes.de  Tue May  6 08:51:59 2008
From: lists at cheimes.de (Christian Heimes)
Date: Tue, 06 May 2008 14:51:59 +0200
Subject: select.poll() and WSAPoll
In-Reply-To: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
References: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
Message-ID: <4820546F.10805@cheimes.de>

inhahe schrieb:
> select.poll isn't supported on Windows, because Windows doesn't have such a 
> feature, or at least it didn't until Vista.  Vista implements the same thing 
> but called  WSAPoll, an article is here 
> http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
> I hope that the next edition of Python supports select.poll on Vista, or at 
> least that someone writes a third-party module fo it. As much as I'd love to 
> do it myself, it's probably beyond me.. i've never used poll before nor 
> written a Python extension.  also, i don't have Vista.

Python 2.6 and 3.0 doesn't have support for WSAPoll so far. I don't have
Vista on my dev box so I can't add WSAPoll as I've added epoll and
kqueue for 2.6.

I don't think we can officially support WPAPoll since Python 2.6 is
suppose to run on Windows 2000 and XP, too.

Christian



From zhalbrecht at gmail.com  Tue May 20 12:26:03 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 09:26:03 -0700 (PDT)
Subject: Accumulating values in dictionary
Message-ID: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>

Given a bunch of objects that all have a certain property, I'd like to
accumulate the totals of how many of the objects property is a certain
value. Here's a more intelligible example:

Users all have one favorite food. Let's create a dictionary of
favorite foods as the keys and how many people have that food as their
favorite as the value.

d = {}
for person in People:
    fav_food = person.fav_food
    if d.has_key(fav_food):
        d[fav_food] = d[fav_food] + 1
    else:
        d[fav_food] = 1

d ends up being something like: {'pie': 400, 'pizza': 200, 'burgers':
100} if 400 people like pie, 200 like pizza and 100 like burgers.

There's nothing wrong (that I know of) by doing it as I have up there,
but is there a simpler, easier way? Looking forward to hearing about
how much of a n00b I am. Thanks in advance!


From bernardet at cppm.in2p3.fr  Tue May  6 08:43:37 2008
From: bernardet at cppm.in2p3.fr (Karim Bernardet)
Date: Tue, 06 May 2008 14:43:37 +0200
Subject: get the pid of a process with pexpect
In-Reply-To: <a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>
References: <fvn52g$tc6$1@ccpntc8.in2p3.fr>
	<a881e222-3ca1-4dcf-9165-b3147f940086@t12g2000prg.googlegroups.com>
Message-ID: <fvpjs7$9nc$1@ccpntc8.in2p3.fr>

Many thanks !
This is what I did

for mytunnel.py :
I use pexpect like this
tunnel_command = '''bash -c "ssh -N -R 60011:localhost:60002 
username at xxxxx.fr "'''
....
com="echo \""+str(ssh_tunnel.pid)+"\" >> pids"
...
time.sleep(172800)

in the bash script which calls mytunnel.py :
./mytunnel.py ${USERN} ${HMM} ${P2USE} ${p2use2}  &
echo $! >>pids

this way I have all the pids

Cheers !


Noah wrote:
> On May 5, 7:18 am, Karim Bernardet <bernar... at cppm.in2p3.fr> wrote:
>> ssh_tunnel = pexpect.spawn (tunnel_command % globals())
>> ...
>> print ssh_tunnel.pid
>>
>> but ssh_tunnel is not the pid of the ssh tunnel
>>
>> Is there a way to get it using pexpect ?
> 
> You will notice that you can't get this information even from the
> shell. This does not work of course:
> 
>     ssh -f -N -L 81:localhost:80 noah at www.example.com
>     echo $!
> 
> However, this seems to work, but I don't trust it. Certainly it isn't
> a real daemon, but this work OK for you if you only need to manage the
> tunnel for the duration of your script. Notice that now Bash had the
> PID in $! variable:
> 
>     ssh -N -L 81:localhost:80 noah at www.example.com &
>     TUNNEL_PID=$!
>     echo $TUNNEL_PID
> 
> What command-line are you using for 'tunnel_command'? This is hard
> because SSH does not provide a way to get the PID of the tunnel if you
> request ssh to go to the background (see the -f option). I always
> considered this a bug because it makes scripting hard. Even if you
> start the tunnel from a shell you can't use $! to get the PID because
> the daemonizing is initiated by ssh. This is not the same use using
> the shell to put a command into the background, so the shell won't
> know anything about the PID.
> 
> I'm not sure if you can put ssh into the background using the shell
> and still have the tunnel work. So you might start a tunnel something
> like this:
> 
>     ssh -f -N -L 80:localhost:80 username at www.example.com
> 
> But can you also do something like this?
> 
>     ssh -N -L 80:localhost:80 username at www.example.com &
>     echo $!
> 
> And for that to even work you will have to use Pexpect to start bash.
> Remember, Python doesn't start your command in a subshell, so you have
> to specify it if you want. So your tunnel command would have to be
> something like this:
> 
>     tunnel_command = '''bash -c "ssh -N -L ...foo... &"'''
>     ssh_tunnel = pexpect.spawn (tunnel_command % globals())
> 
> --
> Noah



From gherron at islandtraining.com  Sun May  4 14:44:09 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 11:44:09 -0700
Subject: is +=1 thread safe
In-Reply-To: <035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>	<yfsod7mfcl0.fsf@gmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
	<035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>
Message-ID: <481E03F9.7050206@islandtraining.com>

Carl Banks wrote:
> On May 4, 12:03 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Alexander Schmolck wrote:
>>     
>>> Gary Herron <gher... at islandtraining.com> writes:
>>>       
>>>> But... It's not!
>>>>         
>>>> A simple test shows that.   I've attached a tiny test program that shows this
>>>> extremely clearly.  Please run it and watch it fail.
>>>>         
>>> In [7]: run ~/tmp/t.py
>>> final count: 2000000
>>>   should be: 2000000
>>>       
>>> (I took the liberty to correct your test to actually do what I said, namely
>>> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
>>> numpy.array(0)``).
>>>       
>> The test was meant to simulate the OP's problem, but even with your
>> suggestion of using numpy, it *still* fails!
>>     
>
>
> Ok, so numpy scalars don't support += atomically.  Thank you for your
> skepticism in discovering this.
>   

You're welcome.
> However, what I said was not wholly untrue: code in C extensions is
> protected by the GIL and thus not interruptable, unless it either
> releases the GIL, or calls back into Python code (which is apparently
> what numpy scalars do).
>   

Yikes.   Thanks for that.

However, the upshot of all of this is that one must maintain extreme 
skepticism.   Unless you know both your Python code and any extension 
modules you call, and you know them at a level necessary to find such 
details, you must conclude that any operation, no matter how atomic it 
my look, may in fact not be atomic. 

Gary Herron


> To illustrate, a small extension module is included below.  Just to
> make things interesting, I added a long busy loop in between reading
> and setting the counter, just to give the other thread maximum
> opportunity to cut in.
>
> If you were to compile it and run the test, you would find that it
> works perfectly.
>
>
> ===========================
> /* atomic.c */
>
> #include <Python.h>
> #include <structmember.h>
>
> typedef struct {
>     PyObject_HEAD
>     long value;
> } AtomicCounterObject;
>
> static int init(AtomicCounterObject* self, PyObject* args,
>                       PyObject* kwargs) {
>     self->value = 0;
>     return 0;
> }
>
> static PyObject* iadd(AtomicCounterObject* self, PyObject* inc) {
>     long incval = PyInt_AsLong(inc);
>     long store, i;
>     static int bigarray[100000];
>     if (incval == -1 && PyErr_Occurred()) return 0;
>
>     store = self->value;
>
>     /* Give the thread plenty of time to interrupt */
>     for (i = 0; i < 100000; i++) bigarray[i]++;
>
>     self->value = store + incval;
>
>     return (PyObject*)self;
> }
>
> static PyObject* toint(AtomicCounterObject* self) {
>     return PyInt_FromLong(self->value);
> }
>
> static PyNumberMethods ac_as_number = {
>     0,                             /*nb_add*/
>     0,                             /*nb_subtract*/
>     0,                             /*nb_multiply*/
>     0,                             /*nb_divide*/
>     0,                             /*nb_remainder*/
>     0,                             /*nb_divmod*/
>     0,                             /*nb_power*/
>     0,                             /*nb_negative*/
>     0,                             /*nb_positive*/
>     0,                             /*nb_absolute*/
>     0,                             /*nb_nonzero*/
>     0,                             /*nb_invert*/
>     0,                             /*nb_lshift*/
>     0,                             /*nb_rshift*/
>     0,                             /*nb_and*/
>     0,                             /*nb_xor*/
>     0,                             /*nb_or*/
>     0,                             /*nb_coerce*/
>     (unaryfunc)toint,              /*nb_int*/
>     0,                             /*nb_long*/
>     0,                             /*nb_float*/
>     0,                             /*nb_oct*/
>     0,                             /*nb_hex*/
>     (binaryfunc)iadd,              /*nb_inplace_add*/
>     0,                             /*nb_inplace_subtract*/
>     0,                             /*nb_inplace_multiply*/
>     0,                             /*nb_inplace_divide*/
>     0,                             /*nb_inplace_remainder*/
>     0,                             /*nb_inplace_power*/
>     0,                             /*nb_inplace_lshift*/
>     0,                             /*nb_inplace_rshift*/
>     0,                             /*nb_inplace_and*/
>     0,                             /*nb_inplace_xor*/
>     0,                             /*nb_inplace_or*/
>     0,                             /* nb_floor_divide */
>     0,                             /* nb_true_divide */
>     0,                             /* nb_inplace_floor_divide */
>     0,                             /* nb_inplace_true_divide */
>     0,                             /* nb_index */
> };
>
> static PyTypeObject AtomicCounterType = {
>     PyObject_HEAD_INIT(NULL)
>     0,                             /*ob_size*/
>     "AtomicCounter",               /*tp_name*/
>     sizeof(AtomicCounterObject),   /*tp_basicsize*/
>     0,                             /*tp_itemsize*/
>     0,                             /*tp_dealloc*/
>     0,                             /*tp_print*/
>     0,                             /*tp_getattr*/
>     0,                             /*tp_setattr*/
>     0,                             /*tp_compare*/
>     0,                             /*tp_repr*/
>     &ac_as_number,                 /*tp_as_number*/
>     0,                             /*tp_as_sequence*/
>     0,                             /*tp_as_mapping*/
>     0,                             /*tp_hash */
>     0,                             /*tp_call*/
>     0,                             /*tp_str*/
>     0,                             /*tp_getattro*/
>     0,                             /*tp_setattro*/
>     0,                             /*tp_as_buffer*/
>     Py_TPFLAGS_DEFAULT,            /*tp_flags*/
>     0,                             /*tp_doc */
>     0,                             /*tp_traverse*/
>     0,                             /*tp_clear*/
>     0,                             /*tp_richcompare*/
>     0,                             /*tp_weaklistoffset*/
>     0,                             /*tp_iter*/
>     0,                             /*tp_iternext*/
>     0,                             /*tp_methods*/
>     0,                             /*tp_members*/
>     0,                             /*tp_getset*/
>     0,                             /*tp_base*/
>     0,                             /*tp_dict*/
>     0,                             /*tp_descr_get*/
>     0,                             /*tp_descr_set*/
>     0,                             /*tp_dictoffset*/
>     (initproc)init,                /*tp_init*/
>     0,
>     PyType_GenericNew,
> };
>
>
> static PyMethodDef methods[] = {
>     {0} /* sentinel */
> };
>
>
> PyMODINIT_FUNC initatomic(void) {
>     PyObject* m;
>     if (PyType_Ready(&AtomicCounterType) < 0)
>         return;
>     m = Py_InitModule("atomic", methods);
>     if (m == NULL)
>         return;
>     Py_INCREF(&AtomicCounterType);
>     PyModule_AddObject(m, "AtomicCounter", (PyObject
> *)&AtomicCounterType);
> }
>
> ========================
> # actest.py
>
> import threading
>
> N = 200000
> import atomic; count = atomic.AtomicCounter()
>
> class timer(threading.Thread):
>     def run(self):
>         global count
>         for i in xrange(N):
>             count += 1
>
> def test():
>     thread1=timer()
>     thread2=timer()
>     thread1.start()
>     thread2.start()
>     thread1.join()
>     thread2.join()
>     print 'final count:', count
>     print '  should be:', 2*N
>
> if __name__=='__main__':
>     test()
> ========================
>
>
> Carl Banks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From arnodel at googlemail.com  Mon May 12 12:53:27 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 17:53:27 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
	<pecora-93F856.11501912052008@ra.nrl.navy.mil>
Message-ID: <m2od7b31mg.fsf@googlemail.com>

Lou Pecora <pecora at anvil.nrl.navy.mil> writes:

> In article <mailman.962.1210572565.12834.python-list at python.org>,
>  "Terry Reedy" <tjreedy at udel.edu> wrote:
>
>> "Mark Dickinson" <dickinsm at gmail.com> wrote in message 
>> news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
>> On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
>> |> Do you have in mind any situations in which it is advantageous to have 
>> 0**0
>> |> undefined?
>> 
>> | (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
>> 
>> Which, of course, I was not, but for the sake of discussion....
>> 
>> | then it's not at all clear that 0.**0. should be considered well-defined.
>> 
>> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
>> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
>> defined whether y is 0 or not, even though there is a discontinuity in the 
>> limit.
>
> Huh?  That "discontinuity" is the problem.  Actually, the problem is 
> that the function f(x,y)=x**y=exp(y*ln(x)) will be double valued at x=0 
> and y=0.  

Actually f(x, y) can take any positive value, depending on how x and y
tend to 0.  Say for example

    x = exp(-k/y), k being a positive constant.

Then as y -> 0+, so does x and y*ln(x) = y * (-k/y) = -k

Therefore f(x, y) = exp(-k) and as y -> 0,

    x -> 0

    f(x, y) -> exp(-k)


> It's value will depend on the direction in which the limit
> approaches (x,y)=(0,0).  You cannot have a function that has two
> values at one domain point without adding branch cuts (see complex
> functions like ln(z), z is complex).  

This is unrelated, z -> ln(z) is a holomorphic function, locally
defined everywhere but at 0, therefore it can be defined on any simply
connected subset of the complex numbers not containing 0.

OTOH, f(x,y) as you defined it above is a real analytic function.
AFAIK, it doesn't have the above property.

-- 
Arnaud


From dave_140390 at hotmail.com  Wed May 28 05:08:17 2008
From: dave_140390 at hotmail.com (dave_140390 at hotmail.com)
Date: Wed, 28 May 2008 02:08:17 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
Message-ID: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>

Hi,

I have problems getting my Python code to work with UTF-8 encoding
when reading from stdin / writing to stdout.

Say I have a file, utf8_input, that contains a single character, ?,
coded as UTF-8:

	$ hexdump -C utf8_input
	00000000  c3 a9
	00000002

If I read this file by opening it in this Python script:

	$ cat utf8_from_file.py
	import codecs
	file = codecs.open('utf8_input', encoding='utf-8')
	data = file.read()
	print "length of data =", len(data)

everything goes well:

	$ python utf8_from_file.py
	length of data = 1

The contents of utf8_input is one character coded as two bytes, so
UTF-8 decoding is working here.

Now, I would like to do the same with standard input. Of course, this:

	$ cat utf8_from_stdin.py
	import sys
	data = sys.stdin.read()
	print "length of data =", len(data)

does not work:

	$ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
	length of data = 2

Here, the contents of utf8_input is not interpreted as UTF-8, so
Python believes there are two separate characters.

The question, then:
How could one get utf8_from_stdin.py to work properly with UTF-8?
(And same question for stdout.)

I googled around, and found rather complex stuff (see, for example,
http://blog.ianbicking.org/illusive-setdefaultencoding.html), but even
that didn't work: I still get "length of data = 2" even after
successively calling sys.setdefaultencoding('utf-8').

-- dave


From mensanator at aol.com  Mon May  5 15:22:07 2008
From: mensanator at aol.com (Mensanator)
Date: Mon, 5 May 2008 12:22:07 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <6bea0cba-7375-40ba-8e39-451f6c0c8ce3@c58g2000hsc.googlegroups.com>

On May 5, 1:43?pm, notbob <not... at nothome.com> wrote:
> On 2008-05-04, notbob <not... at nothome.com> wrote:
>
> > I'm trying to learn how to program. ?I'm using:
>
> > How to Think Like a Computer Scientist
>
> > Learning with Python
> > 2nd Edition
>
> http://openbookproject.net//thinkCSpy/index.xhtml
>
> OK then, using the above, I get everything up till chap 3 and functions and
> then it all falls apart. ?I try using his code and nothing. ?I'm running
> vers 2.5.1 on slackware 12. ?Here's what I don't get:
>
> ----------
>
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
> ? ? print bruce, bruce
>
> This function takes a single argument and assigns it to the parameter named
> bruce. ?The value of the parameter (at this point we have no idea what it
> will be) is printed twice, followed by a newline. ?The name bruce was chosen
> to suggest that the name you give a parameter is up to you, but in general,
> you want to choose something more illustrative than bruce.
>
> ****ME****
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet? ?

Well, it prints whatever bruce is.

> I read another newb explanation here:http://www.codepedia.com/1/BeginnersGuideToPython_Functions
> ...and it doesn't work, either. ?I define myfirstfunction in the pyth editor
> and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

Looks like you didn't call it right. Even though myfirstfunction
doesn't
take any parameters, you still have to use parentheses. You must
invoke
it by myfirstfunction(). Without the parenthese, you're just printing
the
location of the function. This allows functions to call functions, so
that
you can take a list and apply myfirstfunction to every item in the
list
even though myfirstfunction was designed to process only a  single
item.

> ....when I add the ._doc_, it get this:
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> AttributeError: 'function' object has no attribute '_doc_'
> ....so, there is a no go there, too.

Should be TWO underscores, '.__doc__', not '._doc_'.
Such doc strings can be very useful.

For example:
>>> import collatz_functions
>>> help(collatz_functions.collatz)
Help on function collatz in module collatz_functions:

collatz(a, p)
    3x+1 sequencer, no loop detection

    collatz(a,p)
    a: starting value
    p: print options (binary)
       bit 0 print even numbers (turns off power division)
       bit 1 print  odd numbers
       bit 2 print debug (if any)
    returns: CollatzSequenceParameters [R1count, R2count]

Notice collatz() takes two arguments, but I left off the
parentheses and arguments when using the help() function.
That's an example of using the function location.

> ****ME****
>
> The interactive Python shell provides us with a convenient way to test
> our functions. ?We can use the import statement to bring the functions
> we have defined in a script into the interpreter session. ?To see how this
> works, assume the print_twice function is defined in a script
> named chap03.py. ?We can now test it interactively by
> importing it into our Python shell session:
>
> ****ME****
> ok, I try and follow the above, but where is he getting the script? ?So, I
> make a script called chap03.py and put it in ~/pyth/chap03/. ?

Actually, I'm not sure where you should put it. I put mine in
the Lib directory.

> ****ME****
>
> >>> from chap03 import *
> >>> print_twice('Spam')
> Spam Spam
> >>> print_twice(5)
> 5 5
> >>> print_twice(3.14159)
>
> 3.14159 3.14159
>
> ****ME****
> I then try an do the import thing above, but the pyth ed accepts none of it.
> not from:
> from ~/pyth/chap03/ import * ? ? ?
> from chap03 import * ? ? ? ? ? ?#taken from ~/pyth/
> ....nor from any other configuration I can imagine, so that "from" command
> makes no sense. ?

You use "from" to specify what parts of the module to
import, not specify where the module is located. For instance, I
could have said above

from collatz_functions import collatz

and just that function would have been loaded and I could call
it directly, collatz(x,y) instead of collatz_functions.collatz(x,y).

> ****ME****
>
> In a function call, the value of the argument is assigned to the
> corresponding parameter in the function definition. ?In effect, it is if
> bruce = 'Spam' is executed when print_twice('Spam')
> is called, bruce = 5 in print_twice(5), and
> bruce = 3.14159 in print_twice(3.14159)."
>
> ****ME****
> OK, I'm totally lost. ?Neither the above or the other link works or make any
> sense at all. ?Is the above print_twice(5), etc, supposed to work like the
> original print_twice(bruce) function (which still doesn't!), just with a
> different parameter? ?

Yes, once you define print_twice(bruce), you have to call it with
something.

print_twice(5)       prints 5 5
print_twice('fred')  prints fred fred
print_twice(bruce)   is an error if you haven't defined a variable
named bruce

> Call me stupid, but I'd sure like to get past this.
> How am I supposed to get the original def to work? ?I've yet to figure out
> how to get plain ol':
> bruce bruce
> Yes, I've indented 4 spaces where I should.

You have to use parentheses and enclose some legal entity when you
call it.
?
> ****ME****
>
> ----------
>
> I feel dumber'n a bag 0' hammers and in need of clarification.
>
> Thank you
> nb



From gnewsg at gmail.com  Fri May  2 15:15:45 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 12:15:45 -0700 (PDT)
Subject: IPv6 and Python
Message-ID: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>

I'm not sure if this is a question about python programming, system
administration or sockets in general...
I have the FTP server in my signature to which I'd want to add IPv6
support.
My hosting company provides me a common IPv4 address.
I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
really matter) to temporarily use IPv6 for trying to add such feature
to my library (I work on both Windows XP and Linux).
Could someone point me to some resources describing how could I do
that?


Thanks in advance.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From bruno.desthuilliers at gmail.com  Wed May 14 17:50:22 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 14:50:22 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
	<m21w44bx08.fsf@googlemail.com>
	<2851a281-d3f2-46c5-8afe-a5dcd6fa31a6@59g2000hsb.googlegroups.com>
	<m2od78aa4c.fsf@googlemail.com>
Message-ID: <c92c52bf-ce00-4e0e-8245-f38f439d1bf3@y21g2000hsf.googlegroups.com>

On 14 mai, 22:44, Arnaud Delobelle <arno... at googlemail.com> wrote:
> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > On 14 mai, 19:45, Arnaud Delobelle <arno... at googlemail.com> wrote:
> >> __new__ is a static method!
>
> > __new__ is a special-cased staticmethod that  1/ must not be declared
> > as such and 2/ takes the class object as first args. As far as I'm
> > concerned, it's semantically a classmethod.
>
> It's a static method!

Sorry Arnaud, I probably didn't made it clear enough : I do know it is
a staticmethod object. What I say is that
1/ it's special-cased since you don't *explicitely* declare it as a
staticmethod
2/ it behaves just like a classmethod, since it takes the class as
first argument.

IOW, I'm talking about semantic, not implementation.

> --
> Arnaud



From jjb5 at cornell.edu  Wed May  7 17:03:10 2008
From: jjb5 at cornell.edu (Joel Bender)
Date: Wed, 07 May 2008 17:03:10 -0400
Subject: howto print binary number
In-Reply-To: <482214BE.4040702@islandtraining.com>
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
	<482214BE.4040702@islandtraining.com>
Message-ID: <4822190E.2030806@cornell.edu>

> Python 3.0 has such a formatting operation, but Python 2.x does not.  
> However it's not hard to write.

Indeed.  Refraining from using named lambdas:

     >>> def bin(x):
     ...     return ''.join(x & (1 << i) and '1' or '0' for i in
     ...         range(7,-1,-1))
     ...
     >>> bin(12)
     '00001100'
     >>> bin(63)
     '00111111'

It would be nice to have str(x, 2) like int(x, 2), but there are bigger 
fish in pond.


Joel


From mdw at distorted.org.uk  Wed May 14 09:28:22 2008
From: mdw at distorted.org.uk (Mark Wooding)
Date: Wed, 14 May 2008 13:28:22 +0000 (UTC)
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
	<m2d4nqar3w.fsf@googlemail.com>
Message-ID: <slrng2lq7m.ihm.mdw@metalzone.distorted.org.uk>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> AFAIK, Python has lexical scoping, with the restriction that
> non-global non-local names cannot be rebound.

I believe so.

It's possible to implement (shallow) dynamic binding as a Python context
manager, though it involves a little unpleasantness with sys._getframe
to get hold of the caller's variables.  See

  http://www.distorted.org.uk/~mdw/hacks/fluid.py

That Python can do this (and fairly simply) speaks well of its
flexibility and dynamic nature.

I don't know how to make it work properly with multi-threading,
unfortunately.

-- [mdw]


From george.sakkis at gmail.com  Fri May  2 16:09:29 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 13:09:29 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <858f0130-2d19-4429-8f80-346aa5cc7c9f@r66g2000hsg.googlegroups.com>

On May 2, 3:04 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 2, 1:58 pm, Nick J Chackowsky <mediocre_per... at hotmail.com>
> wrote:
>
>
>
> > TkNeo wrote:
> > > WHAT ?
>
> > > This is crazy
>
> > Crazy like a fox?
>
> > a = [1, 2, 3]
> > try:
> >      a.index(99)
> > except:
> >      a.append(99)
> > finally:
> >      print a.index(99)
>
> > MY question: which exception should I actually be catching there?
> > ** Posted fromhttp://www.teranews.com**
>
> ofcouse try catch is going to work but in ideality the index function
> should return a -1 and no way in hell crash.

Please refrain from making such inane comments after an hour or two of
toying with a new language. Read a good tutorial first (e.g.
http://diveintopython.org/toc/index.html) and come back if you have a
real question.

George


From notnorwegian at yahoo.se  Mon May 26 15:56:17 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 12:56:17 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
Message-ID: <7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>

guess what im after is:


> max = len (seq);
> for (int i = 0; i < max; ++i) {
>     do something with seq[i];
>
> }

>
> for item in seq:
>    do something with item

is the first example here a layer between machine and the second
example?

is it machine -> low-level -> highlevel
or is it machine -> highlevel

?


From longorh at npt.nuwc.navy.mil  Thu May  1 13:55:57 2008
From: longorh at npt.nuwc.navy.mil (ron.longo)
Date: Thu, 1 May 2008 10:55:57 -0700 (PDT)
Subject: Python application distribution
Message-ID: <16993351.post@talk.nabble.com>


I haven't figured out a way to do this but see no reason why it cannot be
done.  I have a decent size application written in 100% Python.  I would
like to distribute this application, but only the .pyc files.  Since the
.pyc's are just the compiled sources I figured it would work, but if I copy
just the pyc's and my main app's py into a directory by themselves, I'm
unable to execute.  Why is this?  At this point I'm not really keen on
handing out the source files to my application, it feels unprofessional.

Thanks,
Ron
-- 
View this message in context: http://www.nabble.com/Python-application-distribution-tp16993351p16993351.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From pecora at anvil.nrl.navy.mil  Mon May 12 11:50:19 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 12 May 2008 11:50:19 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
Message-ID: <pecora-93F856.11501912052008@ra.nrl.navy.mil>

In article <mailman.962.1210572565.12834.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Mark Dickinson" <dickinsm at gmail.com> wrote in message 
> news:6b64d8f4-3f61-4295-9298-4633214d1e94 at m73g2000hsh.googlegroups.com...
> On May 11, 9:36 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> |> Do you have in mind any situations in which it is advantageous to have 
> 0**0
> |> undefined?
> 
> | (Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
> 
> Which, of course, I was not, but for the sake of discussion....
> 
> | then it's not at all clear that 0.**0. should be considered well-defined.
> 
> Then it seems equally dubious that 0.**y, y>0, should be well-defined.
> It seems to me that lim as x goes to 0. exp(y*log(x)) is equally well 
> defined whether y is 0 or not, even though there is a discontinuity in the 
> limit.

Huh?  That "discontinuity" is the problem.  Actually, the problem is 
that the function f(x,y)=x**y=exp(y*ln(x)) will be double valued at x=0 
and y=0.  It's value will depend on the direction in which the limit 
approaches (x,y)=(0,0).  You cannot have a function that has two values 
at one domain point without adding branch cuts (see complex functions 
like ln(z), z is complex).  That's not well defined -- in your sense.  
You are choosing a branch cut and you must make sure the rest of your 
math and code are consistent with that.  You should also tell any users 
of your code about that decision.

-- 
-- Lou Pecora


From mh at pixar.com  Tue May 27 03:57:34 2008
From: mh at pixar.com (mh at pixar.com)
Date: Tue, 27 May 2008 07:57:34 GMT
Subject: announce: OraPIG (python wrappers for Oracle)
Message-ID: <O9P_j.2663$xZ.1509@nlpi070.nbdc.sbc.com>

I'm pleased to announce the initial release of OraPIG,
the Oracle Python Interface Generator.

OraPIG generates Python wrapper classes for Oracle packages.

If you use Oracle and Python, this might be a pretty useful
package for you.  Download it and let us know what
you think!

Cheers,
Mark

Download and docs: http://code.google.com/p/orapig

----------------

Quick Example:  Suppose you have a package called tiny
with a single procedure p:

     create or replace package tiny
     as
         procedure p(x in number);
     end tiny;

OraPIG will generate a wrapper class that will allow you to
use the package without having to use the various database
calls. Instead, the wrapper class will be instantiated and
called just like any other Python class:

     class Tiny:
         def __init__(self,curs):  # instantiate class with a cursor
             ...
         def p(self,x):            # call procedure p(x)
             ...

Here's how it's used:

     import cx_Oracle
     import tiny
     conn = cx_Oracle.connect('scott/tiger')
     curs = conn.cursor()

     mytiny = tiny.Tiny(curs)
     mytiny.p(2)           # call a procedure
     curs.commit()         # not done automatically

-- 
Mark Harrison
Pixar Animation Studios


From dullrich at sprynet.com  Sun May 18 10:20:24 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 18 May 2008 09:20:24 -0500
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <i3e034l3n6bvt8g0lbk8bvekatqu49r69c@4ax.com>

On Sat, 17 May 2008 15:32:29 -0700 (PDT), Vicent Giner
<vginer at gmail.com> wrote:

>Hello.
>
>I am new to Python. It seems a very interesting language to me. Its
>simplicity is very attractive.
>
>However, it is usually said that Python is not a compiled but
>interpreted programming language ?I mean, it is not like C, in that
>sense.
>
>I am working on my PhD Thesis, which is about Operations Research,
>heuristic algorithms, etc., and I am considering the possibility of
>programming all my algorithms in Python.

Other people have said things about how to use Python
effieiently. Something that seems relevant that I don't
see mentioned:

Are you going to be doing research _about_ the
algorithms in question or is it going to be research
_using_ these algorithms to draw conclusions
about other things?

Most of the replies seem to be assuming the latter.
If it's the former then Python seems like definitely
an excellent choice - when you have want to try
something new it will be much faster trying it
out in Python, when you write up the results
there will be no need for pseudo-code as a
guide to the real code because the Python
will be just about as easy to read as the
pseudo code would be, etc.

>The usual alternative is C, but I like Python more.
>
>The main drawbacks I see to using Python are these:
>
>* As far as I understand, the fact that Python is not a compiled
>language makes it slower than C, when performing huge amounts of
>computations within an algorithm or program.
>
>* I don't know how likely it is to find libraries in Python related to
>my research field.
>
>* I know Python is a "serious" and mature programming language, of
>course. But I do not know if it is seen as "just funny" in a research
>context. Is Python considered as a good programming language for
>implementing Operations Research algorithms, such as heuristics and
>other soft-computing algorithms?
>
>Maybe this is not the right forum, but maybe you can give me some
>hints or tips...
>
>Thank you in advance.

David C. Ullrich


From p at ulmcnett.com  Wed May 14 14:42:27 2008
From: p at ulmcnett.com (Paul McNett)
Date: Wed, 14 May 2008 11:42:27 -0700
Subject: readlines with line number support?
In-Reply-To: <g0farj$70d$1@registered.motzarella.org>
References: <g0farj$70d$1@registered.motzarella.org>
Message-ID: <482B3293.1080508@ulmcnett.com>

Nikhil wrote:
> I am reading a file with readlines method of the filepointer object 
> returned by the open function. Along with reading the lines, I also need 
> to know which line number of the file is read in the loop everytime.
> I am sure, the line should have the property/attribute which will say 
> the line number of the file.
> 
> If there is none, do I have to end up using the counter in the loop?
> 
> fp = open("file", "r")
> lineno = 0
> for line in fp.readlines():
>     print "line number: " + lineno + ": " + line.rstrip()
>         lineno = lineno + 1

Untested:

for lineno, line in enumerate(open("file")):
   print "line number: %s : %s" % (idx, line.rstrip())

Note the other stylistic changes, too.


HTH.
Paul


From littlesweetmelon at gmail.com  Fri May 16 06:09:29 2008
From: littlesweetmelon at gmail.com (=?GB2312?B?zPC5zw==?=)
Date: Fri, 16 May 2008 18:09:29 +0800
Subject: Instance of class "object"
In-Reply-To: <8763tea9sd.fsf@mulj.homelinux.net>
References: <mailman.1214.1210927611.12834.python-list@python.org>
	<8763tea9sd.fsf@mulj.homelinux.net>
Message-ID: <cdb837ea0805160309g6ea51644nf2337bcddc34eb21@mail.gmail.com>

2008/5/16 Hrvoje Niksic <hniksic at xemacs.org>:
> "??" <littlesweetmelon at gmail.com> writes:
>
>> Howdy,
>>     I wonder why below does not work.
>>
>> a = object()
>> a.b = 1        # dynamic bind attribute failed...
>
> Because the default object class doesn't have a dict or other
> indication of state.  It's a "pure" Python object whose only visible
> properties are its type and its identity.  (On the implementation
> level it also has a refcount.)
>
> This is necessary because all other Python objects (both new-style
> classes and C extensions) inherit from 'object', on the C level.
> Having state in 'object' would mean having that same in *all* other
> Python objects.  The current design, on the other hand, allows
> creation of very lightweight python objects that don't even have a
> dict.
>
> Subclassing object instructs Python as to what kind of state you want
> your class to have.  The default is to have a dict to store
> properties:
>
> # a class with dict -- any property goes through dict, and creating a
> # Foo object actually creates two objects, one Foo and one dict
> class Foo(object):
>    pass
>
> But you can also specify:
>
> # an efficient 'Pair' class holding two objects
> class Pair(object):
>    __slots__ = 'first', 'second'
>
> Instances of Pair take up even less room that 2-element tuples
> because they don't carry the size information in the object.
>
> Now, if the object class carried a dict with it, it would be
> impossible to create a class like 'Pair'.
>
Really interesting. When the tuple ('first', 'second') is assigning to
__slot__, a special operation is done which makes __slot__ pointing
to a magic structure rather than a normal tuple. Am I right?


>> To make it correct, we have to create a new class:
>> class MyClass(object): pass
>> a = MyClass()
>> a.b = 1       # OK
>>
>> Does this strange behavior break the LSP (Liskov substitution
>> principle)?
>
> It follows from LSP that what the subclass may not introduce new
> preconditions.  In this case the subclass accepts a case that the
> original class didn't, so it doesn't introduce a new precondition, it
> simply weakens (removes) an existing one.

Indeed.

Thank you very much.

--
ShenLei

From ptmcg at austin.rr.com  Mon May 19 09:09:06 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 May 2008 06:09:06 -0700 (PDT)
Subject: "Disabling" raw string to print newlines
References: <7f63b5e9-e0d6-4505-9707-b13b70fe61c0@27g2000hsf.googlegroups.com>
Message-ID: <67828af6-82a6-4c5d-adc0-d5f8d4b083b0@x41g2000hsb.googlegroups.com>

On May 19, 4:54?am, kuratk... at kuratkull.com wrote:
> Hello,
>
<snip code example scraping a QOTD from www.mcgyver.com>
>
> print out
> **************

Since you have no control over spacing and line breaks in the input,
you can reformat using the textwrap module.  First replace all "\n"s
with " ", then use re.sub to replace multiple spaces with a single
space, then call textwrap.fill to reformat the line into lines up to
'n' characters long (I chose 50 in the sample below, but you can
choose any line length you like).

out = match.findall(html)
out = out[0].replace("\n"," ")
out = re.sub("\s+"," ",out)

print textwrap.fill(out,50)


-- Paul


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:48:46 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:48:46 +0200
Subject: Browser + local Python-based web server vs. wxPython
In-Reply-To: <bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
References: <mailman.588.1209997391.12834.python-list@python.org>
	<bb73eab1-98f5-4a3a-ba5b-419c7be45b69@z72g2000hsb.googlegroups.com>
Message-ID: <48200d59$0$23038$426a74cc@news.free.fr>

Mike Driscoll a ?crit :
(snip)
> The most popular Python web frameworks seem to be TurboGears, Django,
> Pylons, CherryPy and mod_python.

I wouldn't call mod_python a web framework. It's a library that exposes 
(most of) Apache's request handling process to Python, and is mostly 
used as a deployment solution.

> I know you can run TurboGears, Django and CherryPy locally as well as
> with Apache, so they might garner more of your attention.

Idem for Pylons (and FWIW, Turbogears 2 will be based on Pylons).

<OP>
My own personal preference goes to Pylons, but so far Django is way more 
stable and better documented.



From mail at timgolden.me.uk  Sun May  4 04:57:35 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 04 May 2008 09:57:35 +0100
Subject: Encoding Text
In-Reply-To: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>
References: <d927c3930805031602i4d077ec8jdac29a1852456a36@mail.gmail.com>
Message-ID: <481D7A7F.60903@timgolden.me.uk>

Paul Jefferson wrote:
> I'm learning this and I'm making a program which takes RSS feeds and 
> processes them and then outputs them to a HTML file.
> The problem I have is that some of the RSS feeds contain chachters which 
> I think are outside of the ascii range as when I attempt to write the 
> file containing themI get the follwoign error:

> File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 201, in 
> <module>
>     runner(1,"save.ahc")
>   File "C:\Users\Paul\Desktop\python\Feed reader\test.py", line 185, in 
> runner
>     h.write(html[countera])
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in 
> position 1147: ordinal not in range(128)

> For the life of me I can't figure out what I should do to stop this - I 
> tried to change the html by doing a html[countera] = 
> unicode(html[countera]) but it didn't seem to chaneg anything.

I assume from the traceback that html[countera] contains a unicode
object and that h is a regular file open for writing. If that's the
case then you need to do one of two things to have the string written
correctly: either open/wrap the file via the codecs module to specify
the encoding through which unicode objects should be written; or
explicitly encode the unicode objects as they're written.

If you don't do one of those two things then Python will try to
convert your unicode object naively so that it can be written to
file, and it will use the ascii codec which can't handle anything
outside the basic stuff. You've got a right-quote mark in your
unicode, probably from a Windows program.

Since the latter is easier to demonstrate from the code above:

<code snippet>
h.write (html[countera].encode ("utf8"))
</code snippet>

but a more general-purpose solution is probably:

<code snippet>
import codecs

h = codecs.open ("save.ahc", "w", encoding="utf8")
.
.
h.write (html[countera])
</code snippet>

TJG


From http  Wed May  7 17:50:41 2008
From: http (Paul Rubin)
Date: 07 May 2008 14:50:41 -0700
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <7xmyn1lr66.fsf@ruckus.brouhaha.com>

umpsumps at gmail.com writes:
> def valsort(x):
> 	res = []
> 	for key, value in x.items():
> 		res.append((value, key))
> 	return res

Note: all code below is untested and may have errors ;-)

I think the above is misnamed because it doesn't actually sort.
Anyway, you could write it as a list comprehension:

    def valsort(d):
       return [(value, key) for (key, value) in d]


> def mostfreq(strng):
> 	dic = {}
> 	for letter in strng:
> 		if letter not in dic:
> 			dic.setdefault(letter, 1)
> 		else:
> 			dic[letter] += 1

I would write that with the defaultdict module:

    from collections import defaultdict
    def mostfreq(strng):
       dic = defaultdict(int)
       for letter in strng:
           dic[letter] += 1

Alternatively with regular dicts, you could say:

    def mostfreq(strng):
       dic = {}
       for letter in strng:
           dic[letter] = dic.get(letter, 0) + 1

> 	newd = dic.items()
> 	getvals = valsort(newd)
> 	getvals.sort()
> 	length = len(getvals)
> 	return getvals[length - 3 : length]

Someone else suggested the heapq module, which is a good approach
though it might be considered a little bit high-tech.  If you
want to use sorting (conceptually simpler), you could use the
sorted function instead of the in-place sorting function:

      # return the second element of a 2-tuple.  Note how we
      # use tuple unpacking: this is really a function of one argument
      # (the tuple) but we specify the arg as (a,b) so the tuple
      # is automatically unpacked on entry to the function.
      # this is a limited form of the "pattern matching" found in
      # languages like ML.
      def snd((a,b)): return b

      return sorted(dic.iteritems, key=snd, reverse=True)[-3:]


From tgrav at mac.com  Thu May 22 13:52:37 2008
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 22 May 2008 13:52:37 -0400
Subject: import X vs from x import *
In-Reply-To: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
References: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>
Message-ID: <A69FA821-499C-4EF2-B14B-382631A1EFA2@mac.com>


On May 22, 2008, at 1:44 PM, notnorwegian at yahoo.se wrote:

> import Tkinter

With this you call functions from Tkinter as

Tkinter.function()

> from Tkinter import *

Here you just call

function()

>
> i have a program where if i comment out either of those import-
> statements i get an error.
>
> i thought they meant the same thing and from was supposed to be just
> to imort just a specific function and the * imports everything in the
> module.
> but aparently the above statements have diffrent meaning and i cant
> figure it out fromt he tutorials.

The first creates the Tkinter namespace and all of its functions remain
in that namespace. The latter all functions are imported into the local
namespace.

Cheers
   Tommy (actually norwegian)


From kj7ny at nakore.com  Thu May  8 14:30:37 2008
From: kj7ny at nakore.com (kj7ny)
Date: Thu, 8 May 2008 11:30:37 -0700 (PDT)
Subject: Pamie Sample Code
Message-ID: <bd685ce6-20cc-40f8-9076-a50c49231620@h1g2000prh.googlegroups.com>

Does anyone know the where abouts of some good sample PAMIE code?

Thanks,


From tjreedy at udel.edu  Thu May  8 00:40:27 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 00:40:27 -0400
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
Message-ID: <fvu07p$1gi$1@ger.gmane.org>


<andrej.panjkov at climatechange.qld.gov.au> wrote in message 
news:b2b7ff0b-922e-4ecf-9d04-50ce22243624 at a9g2000prl.googlegroups.com...

| On May 8, 7:38 am, globalrev <skanem... at yahoo.se> wrote:
| I would describe a lambda as a parameterised function template. If you
| dig, the docs call lambdas anonymous functions not bound to a name.

A lambda expression is an abbreviation of a simple def statement:
f = lambda args: expression
def f(args): return expression
have exactly the same effect except that f.func_name will be the less 
useful '<lambda>' instead of the more useful 'f'.

| There is a bit of resemblance to C macros.

Macros in C (and, I believe, some places elsewhere) are text-replacement 
templates.  They are markedly different from function statements.  C macros 
do not create C functions.  Python lambda expression do create Python 
function objects.  Since C macros are statements, not expressions, and are 
introduced by #define, similar to def, one could argue than Python def 
statements are more similar to C macros.

| Here is a simple lambda that implements an exclusive or:
|
| >>> def XOR(x,y) :
| >>>   return lambda : ( ( x ) and not ( y ) ) or ( not ( x ) and ( y ) )

def XORY(x,y):
   def _xory(): x and not y or not x and y
   return _xory

has the same effect.  Because lambda expressions define functions, not 
macros, there is no need for the protective parentheses that macros need.

 Here is another simple lambda, (template) to set up three new
| functions AddOnly, DeleteOnly, and ReplaceOnly.
|
| #--# Lambda function to check that a flag is only on when the other
| two are off. #--#
| def TFF(x,y,z) :
|  return lambda : ( ( x ) and not ( y ) and not ( z ) )

def TFF(x,y,z):
   def _tff(x,y,z): return ( ( x ) and not ( y ) and not ( z ) )
   return _tff

Same result (except for a real name in tracebacks), same usage.

| >>> import math
| >>> def Gaussian( mu, sigma ) :
| ...   return lambda x : math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
| math.sqrt (2 * math.pi *sigma **2 )

def Gaussian(mu, sigma):
   def _gaussian(x): return math.exp( - (x-mu)**2 / 2 /sigma**2 ) /
      math.sqrt (2 * math.pi *sigma **2 )
   return _gaussian

Again, giving the returned function a name will help a bit if it raises an 
exception, which is definitely possible here.

Lambda expressions are an occasional convienience, not a requirement. 
Anyone who is confused by what they do should use an equivalent def 
instead.

Terry Jan Reedy





From torriem at gmail.com  Thu May 15 12:09:07 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 15 May 2008 10:09:07 -0600
Subject: HASH TABLES IN PYTHON
In-Reply-To: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
Message-ID: <482C6023.3090302@gmail.com>

Blubaugh, David A. wrote:
> I was wondering if anyone has ever worked with hash tables within the
> Python Programming language?  I will need to utilize this ability for
> quick numerical calculations.  

Dictionaries are, by definition, hash tables with a very optimized
algorithm to minimize collisions.



From floris.bruynooghe at gmail.com  Tue May 20 08:43:48 2008
From: floris.bruynooghe at gmail.com (Floris Bruynooghe)
Date: Tue, 20 May 2008 05:43:48 -0700 (PDT)
Subject: Running commands on cisco routers using python
References: <mailman.1350.1211210320.12834.python-list@python.org>
Message-ID: <c03ff26d-33d4-4891-8b19-6b7b6da99455@e53g2000hsa.googlegroups.com>

On May 19, 4:18?pm, SPJ <mail2... at yahoo.com> wrote:
> Is it possible to run specific commands on cisco router using Python?
> I have to run command "show access-list" on few hundred cisco routers
> and get the dump into a file. Please let me know if it is feasible and
> the best way to achieve this.

There's no way I'd think about doing this in python.  The best tool
for the task is just shell IMHO:

flub at signy:~$ ssh mercury show access-lists
Welcome to mercury
root at mercury's password:

Standard IP access list 1
    10 permit any (265350 matches)
Standard IP access list 23
    10 permit 192.168.2.0, wildcard bits 0.0.0.255 (2 matches)
Extended IP access list 100
    10 deny ip any 192.168.0.0 0.0.255.255 log-input (8576 matches)
    20 permit ip any any (743438 matches)Connection to mercury closed
by remote host.
flub at signy:~$

You could plug in expect to solve the password thing.  Search for "ssh
expect" for that (and ignore suggestions about public keys, I haven't
found yet how to use those on cisco).


From DrColombes at yahoo.com  Thu May  8 22:00:31 2008
From: DrColombes at yahoo.com (Dr. Colombes)
Date: Thu, 8 May 2008 19:00:31 -0700 (PDT)
Subject: ASCII character logger program in Python?  (Or how to modify 
	EVDEV.py)
Message-ID: <7342596e-dcbc-4853-818e-4d75101b7f12@c19g2000prf.googlegroups.com>

   I've used a very nice Keystroke Logger Python shareware program
(EVDEV.py), written by Micah Dowty.

  But I couldn't find a dedicated ASCII Character Logger program.

  Does anyone know of an ASCII Character Logger program (preferably
Python)?

  Or how  to modify EVDEV.py to log ASCII characters transmitted by
keystrokes?  For example, how to "upper case" keystrokes between a
SHIFT PRESS and SHIFT RELEASE keystroke event pair?  Or "upper casing"
keystrokes between a pair of CAPS LOCK PRESS keystroke events.

  (I don't fully understand the object-oriented keystroke event code
in EVDEV.py., for example, how  to distinguish a PRESS event from a
RELEASE event.)

  Thanks for any suggestions, help you can offer.



From timothywayne.cook at gmail.com  Wed May 21 13:28:56 2008
From: timothywayne.cook at gmail.com (Tim Cook)
Date: Wed, 21 May 2008 14:28:56 -0300
Subject: Python/ZCA Healthcare Project Announcement
Message-ID: <1211390936.3127.166.camel@localhost.localdomain>

Hi All,

I apologize for the length of and the cross posting of this announcement
in advance but I believe it will be of value to you if you have ANY
interest in the healthcare IT field.  Even if you do not have interest
now; you may well after you realize the staggering growth that is
occurring in this sector.

The healthcare sector is a very complex information management space.
Healthcare IT applications are notorious for their lack of real
interoperability.  This of course increases the overall healthcare costs
due to lost and/or missing information.  

While the rate of adoption of IT in direct patient care scenarios has
been slow in the past; it is expected to increase dramatically over the
next few years.  A recent study shows that there will be a demand for an
additional 40,000+ healthcare information technology workers IN THE US
alone: http://medir.ohsu.edu/~hersh/hit-workforce-hersh.pdf 

The current situation for funding healthcare IT projects is that
agencies will have a specific healthcare information management need and
can only fund for that project. Examples are; a diabetes registry or an
AIDS treatment tracking application.  The result is that they get the
application that fills that need but the information is in a specific
format for that project and is, more often than not, incapable of being
shared with any semantic meaning with any other application.  Can the
business of healthcare IT continue in this way?

While there has been much work done over the last 40 years on healthcare
IT standards, we still aren't ahead of the game on any major scale.  
However, a core group of people have been working for almost two decades
with a primary principle of 'implementation'.  Basically, if it can't be
implemented then it doesn't work. A history of their research and
development efforts is worth the quick read:
http://www.openehr.org/about/origins.html 


Implementation is already proven in an opensource Eiffel reference
implementation as well as an opensource Java implementation of the
Reference Model.  There is also a significant C# commercial
implementation by Ocean Informatics
http://oceaninformatics.biz/CMS/index.php 

These are complimented with various opensource tools for working in this
environment (see the Software link at http://www.openehr.org ).

The Python/Zope/Plone community will be very familiar with the concepts
of two-level modeling that is represented in the openEHR specifications:
http://www.openehr.org/releases/1.0.1/roadmap.html In a nutshell, the
openEHR specs. define a very broad, core reference model, that is
constrained by a knowledge model (called archetypes).  Any
implementation of the reference model knows how to deal with the
structure of an archetype and therefore information expressed in an
archetype instance can be exchanged between applications.  

These specifications are becoming more and more widely known. In fact,
the Archetype Definition Language (ADL) is now part of a CEN (European)
health record standard and is an ISO candidate. 

As you may have noticed, there is a non-profit foundation established to
care for the IP and insure that it is and always will be open. The
openEHR Foundation is open to membership by other organizations. In
fact, the Python or Zope foundations could easily become an influential
member. There are also governance processes in place to vet the changes
in the specifications.

The project that I am announcing is the Open Source Health Information
Platform (OSHIP).  I (as others) have tinkered with Python/Zope/Plone
over the past several years in healthcare applications.  These have met
with mixed results mostly due to the same problem; lack of
interoperability (search SourceForge for more info).  

The concept of OSHIP is that it can be an application framework for
interoperable healthcare applications.  This should be especially
appealing to governments and funding agencies worldwide. OSHIP operation
is envisioned as taking the archetypes expressed in ADL and store them
in an Archetype Repository as Python objects.  These instances are then
available to developers to use in healthcare applications.  Knowledge
workers can create/edit the ADL files (using existing opensource tools)
to create whatever knowledge model may be needed for a specific
application.

The current state of OSHIP is that I have entered the specifications as
ZCA interfaces and basic implementations.  But as I said, I am a
'tinkerer'.  I need your help in evaluating this basic implementation
and fleshing out the classes according to the specifications.  

The functioning components already include a parser for the ADL files
and an (almost complete) object builder to store these in the ZODB for
use by OSHIP users. 

While I am now appealing to the broader Python/Zope communities for
participation.  There is already interest in OSHIP.  There is a workshop
scheduled ( http://www.oshipworkshop.if.uff.br )for July 21, 2008 where
we will be spending 10 days on health informatics, openEHR and OSHIP.
The goal is to actually develop one or more OSHIP applications as
examples.  There is at least one PhD student that is using these ideas
for his project.  OSHIP is already considered to be the Python reference
implementation of the openEHR specs.  (BTW: for anyone interested there
is a Ruby implementation underway as well).

In order to promote the widest use of the openEHR specifications; OSHIP
is licensed under the Mozilla tri-license
http://www.mozilla.org/MPL/boilerplate-1.1/mpl-tri-license-txt

If you have any interest in helping move this project ahead please join
the developer's list at the SourceForge Project site:
http://sourceforge.net/projects/oship

The sourcecode will be placed on the openehr.org SVN server by 31 May,
2008. I also plan to put an egg on the SF site.  This will be 'alpha'
level code, though I hope that we can move to a beta stage at a fairly
rapid pace (mid July?). I do not envision that the Zope experts will
need to do the actual manual labor of fixing a lot of this code. If I
can get some helpful suggestions then I will gladly do the work as well
as manage others helping out.  

As an aside, one of the key benefits to this project is that the core
documentation is already complete.  The openEHR specifications do that
for us.  We just need to finish the implementation and some top-level
ZCA specific docs. 

Thank you very much for your kind attention to this project that holds
such a deep passion for me.

Sincerely,
--Tim Cook
    
-- 
Timothy Cook, MSc
Health Informatics Research & Development Services
LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook 
Skype ID == timothy.cook 
**************************************************************
*You may get my Public GPG key from  popular keyservers or   *
*from this link http://timothywayne.cook.googlepages.com/home*
**************************************************************
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From patrickstinson.lists at gmail.com  Fri May 30 15:14:57 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Fri, 30 May 2008 11:14:57 -0800
Subject: python, dlls, and multiple instances
Message-ID: <6214d7a20805301214o6610d62ax70e03775740b39c5@mail.gmail.com>

Is it a correct to assume that you can use multiple instances of
python altogether if each is loaded from a separate dll? For instance,
if I write a couple of dll/so libs, and each has python statically
linked in, is it safe to assume that since dlls use their own address
space then each dll would have it's own GIL, and will therefore
coexist safely within the same app? This is correct across all
platforms, yes?

I ask because I will be writing an audio plugin that uses python both
for the gui and the audio thread. The audio thread must not be
blocked, and will also be set up as a restricted execution environment
to prevent the usual dangerous calls to open, socket, etc. The python
running in the application thread may be blocked and may do whatever
it wants.

I think my understanding is correct since our current dll
implementation statically links python, and I know that the host app
(Ableton Live) also uses python for it's scripting engine. This should
be fun, since I've wanted to write a recipe for using python in an
audio plugin GUIs for a while now.

Cheers!


From duncan.booth at invalid.invalid  Thu May 22 06:55:44 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 10:55:44 GMT
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
Message-ID: <Xns9AA6789C54B0Bduncanbooth@127.0.0.1>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:

> Not to say that your concerns are pointless, and that things cannot be 
> improved somehow, but this is not that trivial, and there may be 
> ambuiguities in some not so rare cases.

It might be worth considering an alternative approach here: a formatted 
exception includes the relevant source lines (where possible).

The source lines are cached by the module linecache.py and it probably 
wouldn't be too hard to build on the line cache so that it also scans the 
source lines looking for class statements and recording the start and end 
line numbers for each class.

That way any classname displayed would be based on the actual source 
nesting and even static methods or functions injected from another class 
would work 'correctly' (at some level).

-- 
Duncan Booth http://kupuguy.blogspot.com


From Lie.1296 at gmail.com  Wed May 14 01:51:49 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 22:51:49 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
Message-ID: <ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>

On May 14, 12:05 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > Just to support this statement: PHP runs an order of magnitude slower than
> > python. Yet a great deal (if not the majority) of dynamic sites out there
> > run under PHP. All of these are unhappy customers?
>
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.
>
> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
>
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"http://news.slashdot.org/article.pl?sid=08/04/30/009245&from=rss


Hello, you're showing a sign of negligence (and ignorance). HTML is a
data descriptor language, PHP is a process descriptor (scripting)
language. They are not interchangeable, and most PHP code produces
HTML in the end. Them saying that they handcode everything means
they're now using a handcoded HTML with PHP instead of WYSIWYG HTML
with PHP they used previously. PHP is still used down there. And if a
big, well-known website claimed that they handcode is a big news to
you, you're just ignorant enough to ignore the fact that most if not
ALL large website is handcoded since they used scripting (mainly as
PHP and Javascript) extensively so that WYSIWYG is not the easiest way
to do it. WYSIWYG is good enugh for static website which most mediocre
website needs, not for dynamic site which is the need for any huge
website. And anything much huger would use a collaboration between
PHP, HTML, Javascript, and a real programming language (like C-family,
Python, Java, Basic). What do you reckon the search engine behind
Google is written in? PHP?

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

Faster in what sense? As I can see it, to write something that
requires 5 keystrokes in Python (a = b) requires 9 keystrokes in FT
(Set a to b) that's almost double. And haven't I mentioned FT's dot .
is just like C's semicolon ;? Would it need a professor to mention
that any program code of reasonable length would need to be indented?
Which FT seems to discourage?

And it seems that FT is ignorant enough to ignore the rule it have
created itself before. If it doesn't cojoin english words such as Go
To, why it cojoins Writeline, squareroot? And if I want to create a
function name that consist of more than one word, I would have to
cojoin the words, what's the point in that?

And your 8 by 8 cross compiler doesn't impress me at all, they're all
based on x86/IA-32 architecture which is quite similar, no PowerPC,
SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
single language compiler instead of three dimensional compiler that
GCC is (cross platform, cross target platform, cross language).

(snip)



From kay.schluehr at gmx.net  Wed May 21 11:39:48 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 21 May 2008 08:39:48 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <a505e370-f352-4dfd-b7e0-605092d4c72d@m73g2000hsh.googlegroups.com>

On 21 Mai, 11:38, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

You are perfectly correct. Pythons design is lacking here IMO. But
what is your question?


From jonbutler88 at googlemail.com  Wed May 21 04:58:34 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 01:58:34 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
Message-ID: <1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>

On May 21, 9:53?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Wed, 21 May 2008 01:18:00 -0700 (PDT), jonbutle... at googlemail.com
> declaimed the following in comp.lang.python:
>
> > Any ideas of how to fix this? Im using python 2.5.2 on mac osx
>
> ? ? ? ? In the absence of minimal runable code reproducing the error
> message...
>
> ? ? ? ? Did you remember to INITIALIZE the attribute to a null value
> somewhere prior to that statement?
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Its not a variable I set, its one of HTMLParser's inbuilt variables. I
am using it with urlopen to get the source of a website and feed it to
htmlparser.

def parse(self, page):
        try:
            self.feed(urlopen('http://' + page).read())
        except HTTPError:
            print 'Error getting page source'

This is the code I am using. I have tested the other modules and they
work fine, but I havn't got a clue how to fix this one.


From kamhung.soh at gmail.com  Tue May  6 23:49:12 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 07 May 2008 13:49:12 +1000
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
Message-ID: <op.uarl8ahfev04yd@melwxp23>

On Wed, 07 May 2008 09:09:08 +1000, Kam-Hung Soh <kamhung.soh at gmail.com>  
wrote:

> On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson  
> <mcrobertson at hotmail.com> wrote:
>
>> I'm having trouble opening a file in linux, whose path has spaces in it.
>>
>> $ mkdir my\ test
>> $ echo test > my\ test/test.txt
>> $ python
>>
>>  >>> open('./my test/test.txt')
>> Exception
>>  >>> open('./my\\ test/test.txt')
>> Exception
>>
>
> Try a string literal by prefixing your path string with "r":
>
> open(r'./my test/test.txt')
>
> See http://docs.python.org/ref/strings.html
>
>> but yet...
>>
>>  >>> import os
>>  >>> os.chdir('./my test')
>>  >>> open('./test')
>>
>> works just fine.
>
> Couldn't test on Linux, but in Windows ...
>
>>>> os.chdir('C:\temp\my test')
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume label  
> syntax is incorrect: 'C:\temp\\my test'
>

Oops.  Should have been:

>>> os.chdir(r'C:\temp\my test')
>>> (no errors)

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 08:49:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 14:49:30 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
Message-ID: <48356bc7$0$19726$426a74cc@news.free.fr>

s0suk3 at gmail.com a ?crit :
(snip)
> Maybe if I have a kid someday I'll teach him Flaming
> Thunder! (just kidding, you prick).

Err... Could we please avoid name calling, gentlemens ?


From daveparker at flamingthunder.com  Wed May 21 16:34:14 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 13:34:14 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>

On May 21, 12:38?pm, Mark Dickinson <dicki... at gmail.com> wrote:

> >>> a+0.999 ? ? # gives expected result
> 9999999999999998.0
> >>> a+0.9999 ? # doesn't round correctly.
>
> 10000000000000000.0

Shouldn't both of them give 9999999999999999.0?

I wrote the same program under Flaming Thunder:

     Set a to 10^16-2.0.
     Writeline a+0.999.
     Writeline a+0.9999.

and got:

     9999999999999998.999
     9999999999999998.9999

I then set the precision down to 16 decimal digits to emulate Python:

     Set realdecimaldigits to 16.
     Set a to 10^16-2.0.
     Writeline a+0.999.
     Writeline a+0.9999.

and got:

      9999999999999999.0
      9999999999999999.0


From http  Mon May 26 16:54:56 2008
From: http (Paul Rubin)
Date: 26 May 2008 13:54:56 -0700
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <7xhcckiy5b.fsf@ruckus.brouhaha.com>

notnorwegian at yahoo.se writes:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
> so obv i want fast insert. i want to delete duplicates too.
> which datastructure is best for this?

Nobody has mentioned balanced-tree data structures so you might want
to look them up.  


From johnjsal at NOSPAMgmail.com  Tue May 20 00:38:57 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 00:38:57 -0400
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>
Message-ID: <20080520003857.b1823ec1.johnjsal@NOSPAMgmail.com>

On Tue, 20 May 2008 00:09:14 -0400
John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> Not that you need help anymore, but I decided to give it a try. Not as elegant as the one- and two-liners, but somewhat concise I guess.

Whoops! Could be cleaner! :)

def compress(s):
    new = []

    for c in s:
        if c not in new:
            new.append(c)
    return ''.join(new)


No, wait! I can do better!

def compress(s):
    new = []
    [new.append(c) for c in s if c not in new]
    return ''.join(new)

Wow, list comprehensions are cool.


From shabda.raaj at gmail.com  Fri May 23 02:50:25 2008
From: shabda.raaj at gmail.com (shabda raaj)
Date: Thu, 22 May 2008 23:50:25 -0700 (PDT)
Subject: [Regexes] Stripping puctuation from a text
Message-ID: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>

I want to strip punctuation from text.

So I am trying,

>>> p = re.compile('[a-zA-Z0-9]+')
>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
'  !!  ! ... ?'

Which gave me all the chars which I want to replace.

So Next I tried by negating the regex,

>>> p = re.compile('^[a-zA-Z0-9]+')
>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
' love tomatoes!! hell yeah! ... Why?'

But this removed the first char instead of the puctuation. So I guess
^ is matching start of line, instead of negation. How can I take
negation of the regex here?


From python at bc90021.net  Sun May 11 15:28:39 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 19:28:39 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
Message-ID: <HNHVj.32518$KJ1.10846@newsfe19.lga>

> ...and the exact error message was?
> 
> Here is a tip: if you want people to help you, then you have to help
> them to help you.  Personally, I wouldn't respond to anymore of your
> questions because you seem incapable of posting the information that was
> requested.

So far, the people who have answered this post have gone on the 
assumption that I'm stupid.  I'm not.  I took perfectly working code, 
cut it from one class, and put it in another.  It stopped working in the 
second class.  I've spent days on this and trust me, given what I've 
experienced of the Python community so far, if I didn't have to ask, I 
wouldn't.

(I really must say that so far the help I am getting in the Python 
community is a big let down.  Whether it's on IRC or here, everyone has 
an arrogance that I don't find anywhere else in the open source 
community, and it seriously makes me question the choice of language that 
I've made.)

The error message was at the top of the thread (am I incapable of posting 
it, or are you incapable of following a thread?), but here it is again:

IOError: [Errno 2] no such file u'tempfileName'



From saluk64007 at gmail.com  Mon May 26 13:52:52 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Mon, 26 May 2008 10:52:52 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1es85$r7u$03$1@news.t-online.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<g1em6f$916$02$1@news.t-online.com> <g1eo0a$27k1$1@news.mtu.ru>
	<g1es85$r7u$03$1@news.t-online.com>
Message-ID: <c3f69bf60805261052u499c7d3cl8647a85b12a6887a@mail.gmail.com>

Did no one hear me mention Spyce?

It is exactly what the OP specifically asked for.

Here's the link: http://spyce.sourceforge.net/

It is not under active development, but is fairly complete (it was under
active development for quite a few years).

And if you want to go the template route (use templates as if they were php,
write a simple controller that uses directory structure), I would build it
on cherrypy.  Turbogears or Django are overkill for this.  Cherrypy is a
very simple controller part of the MVC.

http://www.cherrypy.org

You would write a class something like this:

class Root:
    @exposed
    def default(self,path):
        if path.endswith(".temp"):
            yield template.read(path)
        else:
            #handle other filetypes

But I recommend spyce.  It's exactly what you are looking for.
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From straton at lampsacos.demon.co.uk  Sun May  4 17:16:50 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 04 May 2008 22:16:50 +0100
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same    time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <fvl946$jua$1$830fa7b3@news.demon.co.uk>

Gilly wrote:
> Hi
> I am trying to create an application that uses some form of input to
> create a midi file.
> I would like for this to be a 'real time' process. In other words, I
> want to be able to begin playing the midi file before I finish writing
> it, and continue writing as it plays.
> 
> I would really appreciate any help possible on this matter.
> 
> Thanks!!
Not python, but have you come across XMidi (http://www.palserv.com/XMidi/) ?

It is used in the Apache Cocoon project, which has a
Midi 'block'.
This allows you to go from an XML file, or other
source, to XMidi (an XML version of MIDI), and then
to Quicktime, which you can listen to in your browser.

I'm afraid I don't know whether the source can be
streaming XML or whether you have to reach the end
of the XML before it starts to play.

If you can use streaming XML, you should be able to
generate it from python. Foursuite has a streaming
XML class, for example.

********************************************

A quick synopsis on the cocoon site says:

What is the MIDI block?

The MIDI block currently gives you an XMidiGenerator to generate an XML 
representation of any MIDI file (called XMidi by its author Peter Loeb). 
There is also the XMidiSerializer to render XMidi back as a MIDI file. I 
have used XSLT to provide some basic musical manipulations such as 
transposition, and inversion. Retrograde is harder, but I shall see what 
I can come up with. Hopefully I shall also add some transformers to 
generate SVG visualisations of the XMidi, starting with normal western 
musical notation.


From Joshuajruss at gmail.com  Sat May 24 23:42:57 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sat, 24 May 2008 20:42:57 -0700 (PDT)
Subject: finding icons for Apps
Message-ID: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>

This might be a dumb question. I don't know. I'm new to all this. How
do you find icons for your programs? All GUI applications have cool
icons that represent various things. For instance, to save is often
represented as a disk, etc. You know, the small little picture
references that give meaning to the phrase 'Graphical User Interface'.
But I'm not a graphics artist! Drawing is simply one talent that
skipped me completely. Where can I find icons to use with my programs?

I don't even know how to search for them, because I'm not sure how to
word it. I tried Googling various things: icons, software graphics,
application icons, custom graphics, etc, etc. But I'm not getting much
luck here you guys.

Also, besides just finding a collection of various pre-made icons, who
would I talk to to make me some original custom made icons? I'll look
for hours and find one or two places, but they never respond to my
messages, so I figure they must not do that kind of art work.

I'm looking for both: a collection of graphics and some place (or
someone) that can make custom original graphics. The latter is just
for future reference. The more important one is the former, because I
can't even afford to pay for originals right now. But maybe I will
soon, so it would be nice to have a resource.

Thanks in advance,
Joshua


From martin at v.loewis.de  Mon May  5 12:33:39 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 05 May 2008 18:33:39 +0200
Subject: How to convert unicode string to unsigned char *
In-Reply-To: <mailman.590.1209997850.12834.python-list@python.org>
References: <725404980805050705t24557608v9de541d1bcea546d@mail.gmail.com>	<20080505141651.6859.554247783.divmod.quotient.59048@ohm>
	<mailman.590.1209997850.12834.python-list@python.org>
Message-ID: <481F36E3.3050400@v.loewis.de>

> some_module.some_thing(the_string) function is a swig generated
> function from a C lib. The C lib function expects unsigned char *.
> 
> The generated function is:

If you don't want to change the generated function, I recommend to
put a wrapper around it, as Jean-Paul suggested:

def some_thing(s):
  return some_thing_real(s.encode("utf-8"))

Regards,
Martin


From gagsl-py2 at yahoo.com.ar  Mon May 12 01:39:11 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 02:39:11 -0300
Subject: Accepting text input
References: <72QVj.262833$pM4.115744@pd7urf1no>
	<84QVj.133083$rd2.94188@pd7urf3no>
Message-ID: <op.ua00nlypx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> escribi?:

> Collin wrote:
>> I'm pretty new to Python, but this has really bugged me. I can't find a
>> way around it.
>>
>>
>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>
>> Any help would be appreciated. Thanks.
>
>
> Oh, wow. I feel so stupid. Please disregard this message. <_<

No need to apologize...

> I read the error message just now a bit more carefully, and I tried
> something. I tried defining "yes" as some random numerical value. Then
> when I did:
> (example code)
>
> yes = 123123983 #some number
> test = input("Test test test ")
> if test == yes:
> 	print "It worked."
> else:
> 	print "failed"
>
> (example code off)

The usual way for Python<3.0 is:

answer = raw_input("Test test test ").lower()
if answer == "yes":
     ...

The input() function evaluates user input as an expression: if he types 2+5 the input() function returns the integer 7. I would never use input() in a program - it's way too unsafe; use always raw_input instead.

-- 
Gabriel Genellina



From hv at tbz-pariv.de  Fri May  9 05:16:19 2008
From: hv at tbz-pariv.de (Thomas Guettler)
Date: Fri, 09 May 2008 11:16:19 +0200
Subject: xml.etree Syntax of path?
Message-ID: <68ij33F2tl90fU1@mid.individual.net>

Hi,

I think the documentation of xml.etree is missing something[1].

{{{
find(path)
     Finds the first toplevel element with given tag. Same as getroot().find(path). path is the element to look for.
}}}

According to the source etree has limited support for xpath. I think it should be documented
what 'path' should look like to.


[1]
http://docs.python.org/lib/elementtree-elementtree-objects.html


-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de


From castironpi at gmail.com  Tue May 13 07:20:32 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:20:32 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com> 
	<mailman.1045.1210677569.12834.python-list@python.org>
Message-ID: <59dc600e-bffa-47e9-b579-473fd35572cf@d45g2000hsc.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:46:45 -0300, <dannywebs... at googlemail.com> escribi?:
>
> > On May 13, 11:28 am, dannywebs... at googlemail.com wrote:
> >> Hi - I have a list returned from popen/readlines, and am wondering how
> >> to go about iterating over each item which was returned (rather than
> >> currently having the whole lot returned).
>
> >> >>> f=os.open("./get_hostnames").readlines
>
> > I did indeed mean "os.popen", no "os.open"
>
> Ouch, replace open with popen an my example is valid (but to get the ?
> meaning I intended to write, replace os.open with open...)
>
> --
> Gabriel Genellina

Writing's fine, but don't the musicals suck?


From tonal at promsoft.ru  Thu May  8 03:41:39 2008
From: tonal at promsoft.ru (Alexandr N Zamaraev)
Date: Thu, 08 May 2008 14:41:39 +0700
Subject: strftime() argument 1 must be str, not unicode
In-Reply-To: <3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
References: <48215537.100@promsoft.ru>	<mailman.695.1210147319.12834.python-list@python.org>
	<3j952491dh15h5g09lcn0j5g47nkssr8i5@4ax.com>
Message-ID: <4822AEB3.9040307@promsoft.ru>

Tim Roberts wrote:
 > I think that's a perfectly reasonable thing to expect.  At the risk of
 > over-generalization, there is no good reason why, by this point in time,
 > all of the standard library routines that accept strings shouldn't also
 > accept Unicode strings.
However, file(fname), open(fname), os .*, os.path .*, 
time.strftime(format) take unicode parameters.
See http://bugs.python.org/issue2782


From antroy at gmail.com  Fri May 16 07:43:17 2008
From: antroy at gmail.com (Ant)
Date: Fri, 16 May 2008 12:43:17 +0100
Subject: Pyparsing Question
Message-ID: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>

Hi all,

I have a question on PyParsing. I am trying to create a parser for a 
hierarchical todo list format, but have hit a stumbling block. I have 
parsers for the header of the list (title and description), and the body 
(recursive descent on todo items).

Individually they are working fine, combined they throw an exception. 
The code follows:

#!/usr/bin/python
# parser.py
import pyparsing as pp

def grammar():
     underline = pp.Word("=").suppress()
     dotnum = pp.Combine(pp.Word(pp.nums) + ".")
     textline = pp.Combine(pp.Group(pp.Word(pp.alphas, pp.printables) + 
pp.restOfLine))
     number = pp.Group(pp.OneOrMore(dotnum))

     headtitle = textline
     headdescription = pp.ZeroOrMore(textline)
     head = pp.Group(headtitle + underline + headdescription)

     taskname = pp.OneOrMore(dotnum) + textline
     task = pp.Forward()
     subtask = pp.Group(dotnum + task)
     task << (taskname + pp.ZeroOrMore(subtask))
     maintask = pp.Group(pp.LineStart() + task)

     parser = pp.OneOrMore(maintask)

     return head, parser

text = """


My Title
========

Text on a longer line of several words.
More test
and more.

"""

text2 = """

1. Task 1
     1.1. Subtask
         1.1.1. More tasks.
     1.2. Another subtask
2. Task 2
     2.1. Subtask again"""

head, parser = grammar()

print head.parseString(text)
print parser.parseString(text2)

comb = head + pp.OneOrMore(pp.LineStart() + pp.restOfLine) + parser
print comb.parseString(text + text2)

#===================================================================

Now the first two print statements output the parse tree as I would 
expect, but the combined parser fails with an exception:

Traceback (most recent call last):
   File "parser.py", line 50, in ?
     print comb.parseString(text + text2)
.
. [Stacktrace snipped]
.
     raise exc
pyparsing.ParseException: Expected start of line (at char 81), (line:9, 
col:1)

Any help appreciated!

Cheers,

-- 
Ant.


From gagsl-py2 at yahoo.com.ar  Thu May 15 02:44:42 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 03:44:42 -0300
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
Message-ID: <op.ua6nos2nx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 14 May 2008 23:47:56 -0300, George Sakkis <george.sakkis at gmail.com> escribi?:

> I spent several hours debugging some bogus data results that turned
> out to be caused by the fact that heapq.nlargest doesn't respect rich
> comparisons:
>
>     import heapq
>     import random
>
>     class X(object):
>         def __init__(self, x): self.x=x
>         def __repr__(self): return 'X(%s)' % self.x
>         if True:
>             # this succeeds
>             def __cmp__(self, other): return cmp(self.x , other.x)
>         else:
>             # this fails
>             def __lt__(self, other): return self.x < other.x
>
>     s = [X(i) for i in range(10)]
>     random.shuffle(s)
>
>     s1 = heapq.nlargest(5, s)
>     s2 = sorted(s, reverse=True)[:5]
>     assert s1 == s2, (s,s1,s2)
>
>     s1 = heapq.nsmallest(5, s)
>     s2 = sorted(s)[:5]
>     assert s1 == s2, (s,s1,s2)
>
>
> According to the docs, nlargest is equivalent to: "sorted(iterable,
> key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> be at least a documentation bug, if not an implementation one.

Your class is not properly defined. sorted() only uses < to compare items, but this fact is NOT documented as far as I can tell. So you are abusing this implementation detail by not defining the other comparison operators, and the X class has a rather strange behavior:

py> X(1)<X(2)
True
py> X(1)<=X(2)
False  # !!!
py> X(1)>X(2)
False
py> X(1)==X(1)
False  # !!!

If you write all the six rich comparison methods (__lt__, __le__, etc) nlargest and nsmallest work fine.
If your objects are fully comparable (like numbers; that is, given A and B, one and only one of these holds: A<B, A==B, A>B) the easiest way is to write a helper function (like the old __cmp__) and implement the rich comparison methods using it. Those six methods could be defined in a mixin class.

-- 
Gabriel Genellina



From bj_666 at gmx.net  Wed May 21 04:17:21 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 21 May 2008 08:17:21 GMT
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <69i44hF30tko7U2@mid.uni-berlin.de>

On Wed, 21 May 2008 07:54:32 +0000, mh wrote:

> I want to iterate over members of a module, something like:
> 
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
> 
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?

Take a look at the `inspect` module.

Ciao,
	Marc 'BlackJack' Rintsch


From larry.bates at websafe.com`  Thu May 22 19:12:33 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 22 May 2008 18:12:33 -0500
Subject: Using os.walk to return files in subdirectories
In-Reply-To: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
References: <25f9ae68-e6c3-4c50-a43b-eda5c17f36bd@e39g2000hsf.googlegroups.com>
Message-ID: <JsWdncuznKhkYKjVnZ2dnUVZ_jadnZ2d@comcast.com>

dj wrote:
> Hello All,
> 
> I am attempting to us os.walk to populate two lists with values from a
> directory. The first list contains all the files in the directory and
> subdirectories.
> The second list contains only the files in the subdirectories.
> 
> Here is the code:
> 
> import os
> 
> # list of matching files
> allfiles = [] #store all files found
> subfiles = []  # subdir
> 
> for root,dir,files in os.walk("H:/python_experiments", f1):
>      # this list has the files in all directories and subdirectories
>      filelist = [ os.path.join(root,fi) for fi in files if
> fi.endswith(".py") or fi.endswith(".txt") ]
>      for f in filelist:
>          allfiles.append(f)
> 
>      # split the root
>      s= root.split(('\\') or ('\/'))
>      print 's ',
>      print s
> 
>      # assign the last value to end to come to values in dir
>      end= s[-1]
>      print 'end ',
>      print end
>      print '\n'
> 
>      # this list contains only the files in subdirectories
>      for d in dir:
>         if end == d:
>          print 'subdir % s' % (end)
>          sublist = [ os.path.join(root, fi) for fi in files if
> fi.endswith(".py") or fi.endswith(".txt")]
>          for f in sublist:
>              subfiles.append(f)
> 
> for i in subfiles:
>     print 'subfile', i
> 
> 
> for i in allfiles:
>     print "file ", i
> 
> The allfiles list is populated, but the subfiles list is not. Any
> Suggetions ?


I think you were trying to make this harder than it actually is.  Here is a 
tested script that works for me.

import os
basePath = 'c:/Python25'
allfiles = []
subfiles = []

for root, dirs, files in os.walk(basePath):
     for f in files:
         if f.endswith('.txt') or f.endswith('.py'):
             allfiles.append(os.path.join(root, f))
             if root != basePath: # I'm in a subdirectory
                 subfiles.append(os.path.join(root, f))

print "allfiles=", allfiles
print
print "subfiles=", subfiles
print
print "len(allfiles)=", len(allfiles)
print "len(subfiles)=", len(subfiles)


-Larry Bates


From tenax.raccoon at gmail.com  Thu May 29 14:06:50 2008
From: tenax.raccoon at gmail.com (Jason)
Date: Thu, 29 May 2008 11:06:50 -0700 (PDT)
Subject: should I put old or new style classes in my book?
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <eacaddb6-93c8-4854-98a8-5899d831092e@x19g2000prg.googlegroups.com>

On May 29, 10:07 am, allendow... at gmail.com wrote:
> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen

I've got Python 3.0 alpha 2.  In this version, it looks like you can
define classes in either the old style or new style.  (I snipped the
top line a bit in the following example):

Python 3.0a2 (r30a2:59405M, Dec  7 2007, 15:23:28
Type "help", "copyright", "credits" or "license"
>>> class one(object): pass
...
>>> class two: pass
...
>>> two
<class '__main__.two'>
>>> one
<class '__main__.one'>
>>> type(one)
<type 'type'>
>>> type(two)
<type 'type'>
>>>

That said, old-style classes can't use the staticmethod or classmethod
properties correctly.  New-style classes better support multiple
inheritance and old-style classes can't use metaclasses.  Metaclasses,
and even multiple inheritance may be beyond the scope of your book,
though.

I'd recommend new-style classes myself, as it avoids some nasty subtle
problems if your readers move to more advanced techniques.  You are
correct, though, that some of the classes in the Python library use
the old style.

So, you might want to acknowledge that there are two ways of doing
classes, that a lot of old code uses the old way.  The new way adds
some powerful new techniques that may be beyond the scope of your
book.  In Python 3.0, it won't matter, as everything is a new-style
class anyway.

  --Jason


From ZeeGeek at gmail.com  Wed May 21 02:13:24 2008
From: ZeeGeek at gmail.com (ZeeGeek)
Date: Tue, 20 May 2008 23:13:24 -0700 (PDT)
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
	<MPG.2298f05cd0e8474198975d@news.individual.de>
	<0e7b13f0-649d-442d-ae6e-1df5d88663cd@b5g2000pri.googlegroups.com>
	<MPG.229d3757e185e12e98975f@news.individual.de>
Message-ID: <6243ed5b-fe5e-46c3-b5dc-f0dafbf61e5b@s33g2000pri.googlegroups.com>

On May 21, 2:31?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * ZeeGeek (Tue, 20 May 2008 09:31:27 -0700 (PDT))
>
>
>
> > On May 17, 8:39?pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > * ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> > > > On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > > > > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> > > > > > Hi, what's the default localedir for gettext module on windows? In
> > > > > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > > > > order to make the translation work?
>
> > > > > %PYTHONHOME%\share\locale
>
> > > > I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> > > > \LC_MESSAGES, but still no luck. The following is the code snippet I
> > > > use:
>
> > > > import gettext
> > > > gettext.install('testprogram', unicode = True)
>
> > > The syntax is correct. Is the test program localised under Linux or
> > > Cygwin? If not then the error is somewhere in your application.
>
> > Yes, it's localized under linux.
>
> > > How did you try to set the language on Windows? It works for me on Vista
> > > with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to
> > > be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember
> > > correctly).
>
> > I'm using Simplified Chinese Windows, so I didn't set anything
> > specifically before firing up the program. I found that if I use
> > gettext.GNUTranslations to read in the .mo file, then it's localized.
> > But gettext.install doesn't work.
>
> Well, then why don't you set the environment variable for testing!?

Yes, it works for the program strings by setting LANG to zh_CN. But
glade strings are not localized. I did call gtk.glade.bindtextdomain
and gtk.glade.textdomain, and it works in Linux.


From sturlamolden at yahoo.no  Wed May 21 13:50:53 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:50:53 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2> 
	<4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com> 
	<0DFYj.28609$ie5.21801@newsfe05.ams2>
	<4833f28d$0$3737$426a74cc@news.free.fr>
Message-ID: <e0d2e0fe-f339-43ca-a83f-365f36b68bb0@m36g2000hse.googlegroups.com>

On May 21, 11:59 am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:

> Strange enough, no one calls Java or C# 'interpreted languages', while
> they (or, to be more exact, their reference implementations) both  use
> the same byte-code/VM scheme[1].

Java interprets the bytecode in a virtual machine by default. Only
code 'hotspots' are JIT compiled to native machine code.
Microsoft .NET compiles bytecode to native code on the first
invocation, and caches the machine code for later use. Nothing is
interpreted.

Java can benefit from more runtime information when generating machine
code, but incurs the penalty from running an interpreter most of the
time. MS .NET is more similar to a static compiler. They currently
perform about equally well, sometimes approximating traditional
compiled languages like C++.

But they do not use the same bytecode VM scheme. Particularly,
Microsoft .NET has no virtual machine.

> You know, Common Lisp is also an highly dynamic language, and there are
> now some optimizing native-code Common Lisp compilers that generate very
> efficient binary code. It only tooks about 30 years and way more
> ressources than CPython ever had to get there...

The speed of Common Lisp with compilers like SBCL and CMUCL comes from
optional static typing. This no more magical than what Cython and
Pyrex already can do. If we remove the interpreter when Cython or
Pyrex supports all features of the Python language, and instead rely
on "JIT compilation" by one oth these compilers, we are already there.






From petr.poupa at gmail.com  Thu May  8 08:56:55 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Thu, 8 May 2008 05:56:55 -0700 (PDT)
Subject: listen on TCP port
Message-ID: <7052dd09-4032-46ab-9b37-ba0ca0326475@a1g2000hsb.googlegroups.com>

Hello,
is it possibble listening on TCP port by python and how? I am trying
chilkat but poorly :(.

Thanks


From pistacchio at gmail.com  Mon May 12 03:17:48 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 00:17:48 -0700 (PDT)
Subject: module global variables
Message-ID: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>

hi to all!
can i load a module passing to it, automatically and as default, all
the caller's global variables to act as module's global variables?
thanks


From arnodel at googlemail.com  Fri May  9 15:48:05 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 09 May 2008 20:48:05 +0100
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23>
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
	<d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>
Message-ID: <m2mymz45u2.fsf@googlemail.com>

umpsumps at gmail.com writes:

> On May 9, 1:45 am, cokofree... at gmail.com wrote:
>> >>> key = ''.join(sorted(word))
>>
>> I tend to strip and lower the word as well, otherwise "Hello" and
>> "hello" do not compare...depends on what you want though!
>> Plus you might get a lot of "word\n" as keys...
>>
>> My technique is the this way
>>
>> def anagram_finder(words):
>>     anagrams = {}
>>     for word in words:
>>         word = word.strip()
>>         key = ''.join(sorted(word.lower()))
>>         anagrams.setdefault(key, []).append(word)
>>     return anagrams
>
> What would be the best method to print the top results, the one's that
> had the highest amount of anagrams??  Create a new histogram dict?

You can use the max() function to find the biggest list of anagrams:

top_results = max(anagrams.itervalues(), key=len)

-- 
Arnaud


From castironpi at gmail.com  Wed May  7 15:04:49 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 12:04:49 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<4821e745$0$24414$5fc3050@news.tiscali.nl>
	<mailman.712.1210185123.12834.python-list@python.org>
Message-ID: <ade78903-ae2c-4275-8018-a142321e0db3@2g2000hsn.googlegroups.com>

On May 7, 1:31?pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Wed, May 7, 2008 at 11:30 AM, Paul Melis <p... at floorball-flamingos.nl> wrote:
> > ? ? dic = {}
> > ? ? for letter in strng:
> > ? ? ? ? if letter not in dic:
> > ? ? ? ? ? ? dic[letter] = 0
> > ? ? ? ? dic[letter] += 1
>
> As a further refinement, you could use the defaultdict class from the
> collections module:
>
> ? ?dic = defaultdict(int)
> ? ? ? ?for letter in strng:
> ? ? ? ? ? ?dic[letter] += 1

Sounds like novel flow of control.


From nevillednz at gmail.com  Thu May  1 19:44:34 2008
From: nevillednz at gmail.com (NevilleDNZ)
Date: Thu, 1 May 2008 16:44:34 -0700 (PDT)
Subject: RegEx for matching brackets
Message-ID: <713f6d61-906d-490f-bcbc-befd19e086e5@d19g2000prm.googlegroups.com>

Below is a (flawed) one line RegEx that checks curly brackets (from
awk/c/python input) are being matched.  Is there a one liner for doing
this in python?

ThanX
N

re_open_close="(((\{))[^{}]*((?(0)\})))+"
re_open_close=re.compile(re_open_close)
tests="""
  { this is a test  BAD
  { this is a test } OK
  { this is a test } { this is a test } OK
  { this is a test } { this { this is a test } is a test } OK
  { this is a test  { this { this is a test } is a test } missing
close BAD
""".splitlines()[1:]
for test in tests:
  if bool(re_open_close.search(test)) == bool(re.search("OK",test)):
    print "DETECTED:",test
  else:
    print "MISSED:",test
[linux]$ python ./re_matching.py
DETECTED:   { this is a test  BAD
DETECTED:   { this is a test } OK
DETECTED:   { this is a test } { this is a test } OK
DETECTED:   { this is a test } { this { this is a test } is a test }
OK
MISSED:   { this is a test  { this { this is a test } is a test }
missing close BAD


From dblubaugh at belcan.com  Tue May  6 17:53:35 2008
From: dblubaugh at belcan.com (Blubaugh, David A.)
Date: Tue, 6 May 2008 17:53:35 -0400
Subject: Bit twiddling floating point numbers
In-Reply-To: <9398d71d0804281110q181efd6au223ef65442c6fca1@mail.gmail.com>
References: <35f3b367-44cd-4595-b920-49a22162711b@c33g2000hsd.googlegroups.com>
	<1bb82da0-6640-4183-b257-cfa2bad25575@m36g2000hse.googlegroups.com>
	<%oOzj.61235$Pv2.29718@newssvr23.news.prodigy.net>
	<980961ef-43c8-4936-a536-8b5fbc04f0d0@2g2000hsn.googlegroups.com>
	<27CC3060AF71DA40A5DC85F7D5B70F3802A54539@AWMAIL04.belcan.com>
	<9398d71d0803062204n761fe7ebr277182d3424628ae@mail.gmail.com>
	<27CC3060AF71DA40A5DC85F7D5B70F380350D31D@AWMAIL04.belcan.com>
	<9398d71d0804281110q181efd6au223ef65442c6fca1@mail.gmail.com>
Message-ID: <27CC3060AF71DA40A5DC85F7D5B70F380365E2B0@AWMAIL04.belcan.com>

Sorry for the reply.  I did not get your message until now.  I was
wondering if there was a way to develop floating-point mathematics
package within a module.  I was wondering if some of your work on bit
twiddling floating - point numbers could be provided to me!!!  Thanks.  
 
 
David Blubaugh
 
 

________________________________

From: Jeff Goldfinkle [mailto:jeff.goldfinkle at gmail.com] 
Sent: Monday, April 28, 2008 2:10 PM
To: Blubaugh, David A.
Subject: Re: Bit twiddling floating point numbers


sure - go right ahead


On Mon, Apr 28, 2008 at 8:17 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:


	Are you still out there?  
	 
	 
	Can I still ask you about my question?
	 
	 
	thanks,
	 
	David
	 
	 

________________________________

	From: Jeff Goldfinkle [mailto:jeff.goldfinkle at gmail.com] 
	Sent: Friday, March 07, 2008 1:04 AM
	To: Blubaugh, David A. 

	Subject: Re: Bit twiddling floating point numbers
	

	Hi David
	
	Sure. I'm not sure what help I can be, but ask away.
	
	Jeff
	
	
	
	
	On Thu, Mar 6, 2008 at 11:25 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:
	

		Jeff,
		
		
		Hello.  This idea or representing a float with long
seems to be
		extremely interesting.  I am currently utilizing the
MyHDL environment
		to map algorithms to hardware.  May I ask you more
questions in order to
		map integer mathematics to emulate floating -point
mathematics, in order
		to maybe develop efficient pseudo-floating-point
hardware??
		
		 Thanks,
		
		David Blubaugh
		
		
		
		
		
		-----Original Message-----
		From: Jeff.Goldfinkle at gmail.com
[mailto:Jeff.Goldfinkle at gmail.com]
		Sent: Thursday, March 06, 2008 4:01 PM
		To: python-list at python.org
		Subject: Re: Bit twiddling floating point numbers
		
		On Mar 6, 11:00 am, Bryan Olson
<fakeaddr... at nowhere.org> wrote:
		> Mark Dickinson wrote:
		
		> > Jeff Goldfin wrote:
		> >> I can pack and unpack a float into a long e.g.
		> >> struct.unpack('I',struct.pack('f',0.123))[0]
		> >> but then I'm not sure how to work with the
resulting long.
		>
		> >> Any suggestions?
		>
		
		> > One alternative to using struct is to use math.ldexp
and math.frexp:
		>
		> >>>> m, e = frexp(pi)
		> >>>> m
		> > 0.78539816339744828
		> >>>> e
		> > 2
		> >>>> int(m*2**53)
		> > 7074237752028440L
		>
		> > Then you can do your bit twiddling on int(m*2**53),
before using
		> > ldexp to 'repack' the float.
		>
		> Ah, those are handy. Jeff described his problem: "In
particular, I
		
		> would like to round my float to the n most significant
bits."
		
		> I think this works:
		>
		>    from math import frexp, ldexp, floor
		>
		>    def round_mantissa(x, nbits):
		>        shifter = 1 << nbits
		>        (m, e) = frexp(x)
		>        m = floor(m * shifter + 0.5) / shifter
		>        return ldexp(m, e)
		>
		> --
		> --Bryan
		Thanks for the help - your function seems to fit the
bill even better
		than gmpy since I don't need an external module. In my
case I'll use m =
		floor(m * shifter) / shifter instead of m = floor(m *
shifter +
		0.5) / shifter
		
		Jeff
		
		
		
		This e-mail transmission contains information that is
confidential and may be
		privileged. It is intended only for the addressee(s)
named above. If you receive
		this e-mail in error, please do not read, copy or
disseminate it in any manner.
		If you are not the intended recipient, any disclosure,
copying, distribution or
		use of the contents of this information is prohibited.
Please reply to the
		message immediately by informing the sender that the
message was misdirected.
		After replying, please erase it from your computer
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		correcting this error is appreciated.
		
		


	This e-mail transmission contains information that is
confidential and may be privileged.   It is intended only for the
addressee(s) named above. If you receive this e-mail in error, please do
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From deets at nospam.web.de  Wed May 28 11:24:41 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 17:24:41 +0200
Subject: BadStatusLine error
References: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>
Message-ID: <6a5bqpF165l66U1@mid.uni-berlin.de>

Jim wrote:

> Hi
> 
> I get a BadStatusLine error (indicated below). Can anyone help with
> how to
> catch error in code before abort?

http://docs.python.org/tut/node10.html

Diez


From cjames at callone.net  Tue May 27 16:58:15 2008
From: cjames at callone.net (c james)
Date: Tue, 27 May 2008 15:58:15 -0500
Subject: Books for learning how to write "big" programs
In-Reply-To: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
References: <219c77ef-dd0c-464b-bb6a-e4f3bee89eae@x41g2000hsb.googlegroups.com>
Message-ID: <g1hsl7$959$1@ger.gmane.org>

duli wrote:
> Hi:
> I would like recommendations for books (in any language, not
> necessarily C++, C, python) which have walkthroughs for developing
> a big software project ? So starting from inception, problem
> definition, design, coding and final delivery on a single theme
> or application.
> 
> Most of the code I have written and books that I have read deal with
> toy programs and I am looking for something a bit more
> comprehensive.  For example, maybe a complete compiler written in C++
> for some language, or a complete web server or implementing
> .net libraries in some language (just a few examples of the scale of
> things I am interested in learning).
> 
> Thanks!
> Duli.
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

"Dreaming in Code" www.dreamingincode.com may fit part of this 
description. While it isn't exactly what you desire, it is a good read 
on the difficulty in creating excellent software.



From not-for-mail at sonic.net  Tue May  6 10:55:07 2008
From: not-for-mail at sonic.net (Raymond)
Date: 06 May 2008 14:55:07 GMT
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
Message-ID: <4820714b$0$34544$742ec2ed@news.sonic.net>

>Another approach is to use the split() function in "re" module.

Ah ha, thar's the disconnect.  Thanks for all the pointers, my def is
now working.  Still don't understand the logic behind this design though.
I mean why would any programming language have separate search or find
functions, one for regex and and another for non-regex based pattern
matching?

Aren't sed, awk, grep, and perl the reference implementations of search
and replace?  They don't have non-regex functions, why does Python?
Wouldn't it be a lot simpler to use a flag, like grep's '-f', to change
the meaning of a search string to be literal?

My other gripe is with the kludgy object-oriented regex functions.
Couldn't these be better implemented in-line?  Why should I, as a coder,
have to 're.compile()' when all the reference languages do this at compile
time, from a much more straightforward and easy to read in-line function...

Raymon


From google at mrabarnett.plus.com  Tue May 20 17:40:48 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 20 May 2008 14:40:48 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>
	<3650313b-fe8d-4beb-bfbd-2748757233e2@p25g2000pri.googlegroups.com>
Message-ID: <60f15334-e7fa-4a27-add1-5f4fd2e14276@w4g2000prd.googlegroups.com>

On May 20, 4:20 am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > > I <davepar... at flamingthunder.com> wrote:
> > > Plus, me getting paid to work on Flaming Thunder is far more
> > > motivating than me not getting paid to work on Python.
> > On May 14, 8:30 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > That's truly disappointing.
>
> I guess I could have stated that better.  Flaming Thunder is a labor
> of love for me.  I've programmed in almost every language since
> FORTRAN and Lisp, and Flaming Thunder is the language I've always
> wished the others were.
>
> For one example, I've always preferred compiled languages because
> they're faster.  So Flaming Thunder is compiled.
>
> For another example, I've always preferred languages that are English-
> like because it's easier to return to your code after several years
> and still know what you were doing (and it's easier for someone else
> to maintain your code).
>
> For over 5 years I've been working on Flaming Thunder unpaid and on my
> own, getting the back-end up and running.  8-by-8 shotgun cross
> compilers written in assembly language, that can fit all of the
> libraries for both the 32- and 64-bit versions of FreeBSD, Linux, Mac
> OS X and Windows into a single executable file that's less than 180K,
> aren't written overnight.
>
> So now that I've released it, it's extremely gratifying that people
> think it's cool enough to actually pay $19 for it.  That gives me lots
> of motivation (and buys enough time) for me to add features to it as
> fast as possible.
>
> To whit: you pointed out the awkwardness in Python of having to
> declare a for-loop variable when you only wanted to loop a specific
> number of times and didn't need the variable.  Last week, Flaming
> Thunder had the same awkwardness.  If you wanted to loop 8 times:
>
> for i from 1 to 8 do <statement>
>
> you still had to use a variable (in this case, i).  This week, I've
> added two new for-loop variations that fix that awkwardness, and also
> allow you to explicitly declare an infinite loop without having to
> rely on idiomatic constructs such as while-true.  Examples of the two
> new variations (for-forever and for-expression-times):
>
> Write "Fa".
> For 8 times do write "-la".
>
Personally (and borrowing from Python), I'd prefer something more
like:

Write "Fa".
Repeat 8 times:
    Write "-la".

> For forever do
>   (
>   Write "Do you know the definition of insanity? ".
>   Read response.
>   ).

Repeat:
    Write "Do you know the definition of insanity? ".
    Read response.


From wuwei23 at gmail.com  Fri May 30 06:22:21 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 30 May 2008 03:22:21 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<5c5744cb-d801-48aa-b34d-c03c036d4885@w8g2000prd.googlegroups.com>
Message-ID: <8bdbd7f0-2b60-4a31-8ee6-edaed0496cc8@w5g2000prd.googlegroups.com>

On May 30, 7:39 pm, Lie <Lie.1... at gmail.com> wrote:
> An example is python's notion for 'for' loop, which can
> only loop a list[...]

Actually, the for statement steps through any object that provides an
iterator interface. Lists just happen to be one such object type.



From castironpi at gmail.com  Wed May 14 05:32:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 02:32:40 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
Message-ID: <6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com>

On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > you can safely ignore its posts.
>
> > How does it generate text?
>
> My guess is by inhaling a lot of intoxicants.

However you know what would be helpful?  If I could go to the right
place to start the ring.


From duncan.booth at invalid.invalid  Fri May 16 09:34:42 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 May 2008 13:34:42 GMT
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
	<mailman.1218.1210936257.12834.python-list@python.org>
Message-ID: <Xns9AA09442779A0duncanbooth@127.0.0.1>

Tim Golden <mail at timgolden.me.uk> wrote:

>> 3) You assume, that Firefox is always installed at C:\Program
>> Files\Mozilla Firefox\firefox.exe
>> However the path largely differs from system to system. 
> 
> This is broadly true. However, it's fairly clear from the
> phrase "the user's desktop" that the OP is working in some
> kind of corporate environment where he can be fairly sure
> where Firefox is installed by policy. In addition, it's not so
> easy to find its path if it's not in the default place since apps 
> very rarely add their location to the system PATH these days 
> (and Firefox certainly doesn't). You could scan the registry for 
> its App Paths entry in the registry but I don't know if any other 
> way if it's not  the default browser (which it's clear from the 
> original post it  may not be).
> 

It's not too hard to get the required command line from the registry:

import _winreg
print _winreg.QueryValue(_winreg.HKEY_CLASSES_ROOT,
    'FirefoxURL\shell\open\command')

and of course it throws an exception if firefox isn't installed.

Then just replace %1 with the url to get the actual command you need.

-- 
Duncan Booth   http://kupuguy.blogspot.com


From gabriel.rossetti at arimaz.com  Mon May 26 08:31:42 2008
From: gabriel.rossetti at arimaz.com (Gabriel Rossetti)
Date: Mon, 26 May 2008 14:31:42 +0200
Subject: b64encode and unicode problem
In-Reply-To: <483A9437.4010505@mxm.dk>
References: <483A8D9F.3080104@arimaz.com> <483A9437.4010505@mxm.dk>
Message-ID: <483AADAE.1060509@arimaz.com>

Max M wrote:
> Gabriel Rossetti skrev:
>> Hello everyone,
>>
>> I am trying to encode a string using b4encode and I get the following 
>> error :
>>
>>  >>> b64encode(u"Salut Pierre, comment ?a va?")
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in <module>
>>  File "/usr/lib/python2.5/base64.py", line 53, in b64encode
>>    encoded = binascii.b2a_base64(s)[:-1]
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe7' in 
>> position 22: ordinal not in range(128)
>>
>> If I remove the "u" infront of the string, it works. The problem is 
>> that I in my program, the string is given to me un unicode/utf-8. I 
>> tried several things, but I still get it, How can I get it to work, 
>> anybody have any idea?
>
> I have written about it here:
>
> http://mxm-mad-science.blogspot.com/2008/03/python-unicode-lessons-from-school-of.html 
>
>
> The reason/solution for your problem is mentioned somewhere below the 
> middle.
>
>
Thank you, it's a bit clearer now, I thought unicode and utf8 were 
synonyms, but  from what I understood unicode is sort of like bytecode, 
and utf8/latin1/etc would be like a asm dialect that bytecode would be 
translated to.

Thank you,
Gabriel

-- 
Arimaz SA
Av. du 24 Janvier 11
Ateliers de la Ville de Renens, Atelier 5
1020 Renens, Switzerland
www.arimaz.com
www.mydeskfriend.com
Mob: +41-(0)79-539-0069
Tel: +41-(0)21-566-7343



From martin at v.loewis.de  Sun May 18 05:15:06 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 18 May 2008 11:15:06 +0200
Subject: morning in Python
In-Reply-To: <143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <482FF39A.5010604@v.loewis.de>

> Full day later, I think it, to emphasize state, would prioritize
> context.  The reason for the huge ramble was, believe it or not,
> namespace conflict... as though any other states around here might
> nose in.

I think the namespace conflict is rather in cities than in states.
For example, there are several cities called "Berlin", but only
one state (that I know of) is called "Mecklenburg-Vorpommern".
In some cases, prefixing helps, e.g. you don't call it "York"
when that already exists, but "New York".

There is also the issue of aliases. Some call it Moscow, some Moskau,
when it is really called ??????. Of course, the same issue exists
for states: some call it Kalifornien, others California.

> And thanks to 'inhahe' for coming back with the
> question.  ...Which would explain next move to 'prioritize context'.
> Context is a high priority for people.

I'd rather say that priority is a high context.

Regards,
Martin


From webmail.hce at gmail.com  Fri May  9 00:42:21 2008
From: webmail.hce at gmail.com (hce)
Date: Fri, 9 May 2008 14:42:21 +1000
Subject: Python script freezed on Window DOS terminal
Message-ID: <95455e980805082142w7891868fy89da4c0be6659246@mail.gmail.com>

Hi,

I am running Python and a script on XP DOS terminal, the script
build.py printed out messages on the Terminal, then asked for an input
of numbers. But, I pressed a key, nothing came in DOS terminal,
Eventually, no key active and seem the DOS terminal is freezed. I
could not even terminate the terminal by Ctrl-C or Ctrl-D. The same
script was running fine on linux or Cygwin terminals. Any thoughts
what was the problem?

Thank you.

Kind Regards.

Jim


From sven.siegmund at gmail.com  Sun May 11 18:40:13 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Sun, 11 May 2008 15:40:13 -0700 (PDT)
Subject: IDLE 3.0a5 has problems with Unicode
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
	<482774b4$0$11617$9b622d9e@news.freenet.de>
Message-ID: <4077ed44-1341-4075-9560-a9e8a06b319d@r66g2000hsg.googlegroups.com>

> No, it's now a known bug (at least I don't know it). Whether or not it
> gets fixed might depend on whether or not it gets reported to
> bugs.python.org.

Ok, I'll repost it there.

S.


From wuwei23 at gmail.com  Thu May 29 09:24:34 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 06:24:34 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
Message-ID: <138c1ce9-80b1-4123-b88d-364055f63d78@i18g2000prn.googlegroups.com>

On May 29, 11:09 pm, TYR <a.harrow... at gmail.com> wrote:
> I'm doing some data normalisation, which involves data from a Web site
> being extracted with BeautifulSoup, cleaned up with a regex, then
> having the current year as returned by time()'s tm_year attribute
> inserted, before the data is concatenated with string.join() and fed
> to time.strptime().
>
> Here's some code:
> timeinput = re.split('[\s:-]', rawtime)
> print timeinput #trace statement
> print year #trace statement
> t = timeinput.insert(2, year)
> print t #trace statement
> t1 = string.join(t, '')
> timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> year is a Unicode string; so is the data in rawtime (BeautifulSoup
> gives you Unicode, dammit). And here's the output:
>
> [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> 2008 (OK, so the year is a year)
> None (...but what's this?)
> Traceback (most recent call last):
>   File "bothv2.py", line 71, in <module>
>     t1 = string.join(t, '')
>   File "/usr/lib/python2.5/string.py", line 316, in join
>     return sep.join(words)
> TypeError

list.insert modifies the list in-place:

>>> l = [1,2,3]
>>> l.insert(2,4)
>>> l
[1, 2, 4, 3]

It also returns None, which is what you're assigning to 't' and then
trying to join.

Replace your usage of 't' with 'timeinput' and it should work.


From vivainio at gmail.com  Sun May 18 11:54:38 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 18 May 2008 15:54:38 GMT
Subject: Shelve or pickle module
References: <bc5951d00805172014y34bb4336sf0a01111815e6a6@mail.gmail.com>
	<mailman.1299.1211085964.12834.python-list@python.org>
Message-ID: <y7674ngk.fsf@gmail.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:


> A shelve is just a persistent dictionary that uses pickle to store
> the objects.  If you want to store one or a few objects, using
> pickle directly may be easier.  Any problem you may have with pickle
> (nonpickleable objects, security risks) will happen with shelve too.

Shameless plug warning!

If you want to store pickles "directly" in a directory with
shelve-like dict API, you may also be interested in my "pickleshare"
module:

http://pypi.python.org/pypi/pickleshare/0.3



From d3vvnull at gmail.com  Thu May  8 07:52:09 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 06:52:09 -0500
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <4822E485.4040107@aim.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
	<4822E485.4040107@aim.com>
Message-ID: <170543c70805080452m5c94d480h2a23f0af62180604@mail.gmail.com>

For me, the difference is #!python doesn't work for me.  I get a bad
interpreter error.

On Thu, May 8, 2008 at 6:31 AM, Brian Vanderburg II <
BrianVanderburg2 at aim.com> wrote:

> This is sort of related, but I'm wondering what is different between
> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same
> thing, since an absolute path is not specified, find 'python' from the PATH
> environment,  I don't really know.
>
> Brian Vanderburg II
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From george.sakkis at gmail.com  Sun May  4 02:35:05 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 3 May 2008 23:35:05 -0700 (PDT)
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com>
	<mailman.515.1209881092.12834.python-list@python.org>
Message-ID: <7b142d7f-a9f6-4739-8b6f-1eca581b0517@j22g2000hsf.googlegroups.com>

On May 4, 2:04?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sun, 04 May 2008 02:17:07 -0300, dave <squareswallo... at invalid.com> escribi?:
>
>
>
> > Hello,
>
> > I made a function that takes a word list (one word per line, text file)
> > and searches for all the words in the list that are 'shifts' of
> > eachother. ?'abc' shifted 1 is 'bcd'
>
> > Please take a look and tell me if this is a viable solution.
>
> > ?def shift(word, amt):
> > ? ?ans = ''
> > ? ?for letter in word:
> > ? ? ? ? ? ?ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
> > ? ?return ans
>
> > def fileshift(x):
> > ? ?fin = open(x)
> > ? ?d = {}
> > ? ?for line in fin:
> > ? ? ? ? ? ?d[line.strip()] = [1]
> > ? ? ? ? ? ?for i in range(1, 26):
> > ? ? ? ? ? ? ? ? ? ?ite = shift(line.strip(), i)
> > ? ? ? ? ? ? ? ? ? ?if ite in d:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ?print ite
>
> > Any tips/suggestions/critiques greatly appreciated.. I'm trying to
> > teach myself Python (and still beginning) and would love any helpful
> > info.
>
> First, looking at the code, you're evaluating line.strip() a lot of times; I'd avoid it.
> Looks like you're using a dictionary just for the keys - the set type is more adequate here (seehttp://docs.python.org/lib/types-set.html). In any case, I'd use a value like None instead of [1]
> But I'd use a different algorithm. Instead of generating all posible shifts for a given word, I'd substract the newly read word from each previous words (here, "substract two words" means substract the character code for corresponding positions, modulo 26). Shifted words, when substracted, have the same number on all positions.


A faster algorithm is to create a 'key' for each word, defined as the
tuple of ord differences (modulo 26) of consecutive characters. E.g.
the key of 'acf' is (2,3); 'c' is 2 positions after 'a' and 'f' 3
positions after 'c'. Shifted words (and only these) have the same key.
Here's a straightforward implementation that generates all the lists
of equally-shifted words:

from collections import defaultdict

def iter_shifted(words):
    key2shifted = defaultdict(list)
    for word in words:
        ords = map(ord,word)
        key = tuple((ords[i]-ords[i-1]) % 26
                    for i in xrange(1,len(ords)))
        key2shifted[key].append(word)
    for shifted in key2shifted.itervalues():
        if len(shifted) > 1:
            yield shifted

if __name__ == '__main__':
    words = 'abc bef jas cba cde zab azy hkl'.split()
    for shifted in iter_shifted(words):
        print shifted

# *** output ***
#['bef', 'hkl']
#['abc', 'cde', 'zab']
#['cba', 'azy']


From jurgenex at hotmail.com  Thu May  8 02:05:20 2008
From: jurgenex at hotmail.com (Jürgen Exner)
Date: Thu, 08 May 2008 06:05:20 GMT
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
Message-ID: <fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>

George Neuner <gneuner2/@/comcast.net> wrote:
>On Wed, 7 May 2008 16:13:36 -0700 (PDT), "xahlee at gmail.com"
><xahlee at gmail.com> wrote:

         +-------------------+             .:\:\:/:/:.
         |   PLEASE DO NOT   |            :.:\:\:/:/:.:
         |  FEED THE TROLLS  |           :=.' -   - '.=:
         |                   |           '=(\ 9   9 /)='
         |   Thank you,      |              (  (_)  )
         |       Management  |              /`-vvv-'\
         +-------------------+             /         \
                 |  |        @@@          / /|,,,,,|\ \
                 |  |        @@@         /_//  /^\  \\_\
   @x@@x@        |  |         |/         WW(  (   )  )WW
   \||||/        |  |        \|           __\,,\ /,,/__
    \||/         |  |         |      jgs (______Y______)
/\/\/\/\/\/\/\/\//\/\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
==============================================================

jue


From castironpi at gmail.com  Thu May 15 10:04:13 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:04:13 -0700 (PDT)
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
	<d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>
	<wihr6c33j1s.fsf@panix5.panix.com>
Message-ID: <16f79f5a-ef95-41ce-a58d-3b513e201d35@56g2000hsm.googlegroups.com>

On May 15, 6:26?am, ro... at panix.com (R. Bernstein) wrote:
> "Alan J. Salmoni" <salm... at gmail.com> writes:
>
> > I'm not sure if this is exactly what you're after, but try looking
> > into the 'code' module.
>
> > It's fairly easy to make an interactive interpreter that runs within
> > your program. If you import your programs variables into
> > __main__.__dict__, you can have access to them which can be funky. You
> > can even override the showtraceback method to catch various exceptions
> > and do daft things like adding new methods to strings. I guess it
> > would even be possible to have the commands compared to a list of
> > commands and keywords to build a restricted interpreter, though how
> > secure this would be against a determined attack is another matter.
>
> > Alan
>
> I think this (largely) does the trick. Thanks!
>
> I'm not sure about how to deal with globals yet which should come from
> a stackframe f_globals. It might be possible to save and restore
> __main__.__dict__ before and after the call to interact(). Probably
> would have been cooler to design interact() to take a globals
> parameter, same as eval does.
>
>
>
>
>
> > On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
> >> The next release of pydb will have the ability to go into ipython from
> >> inside the debugger. Sort of like how in ruby-debug you can go into
> >> irb :-)
>
> >> For ipython, this can be done pretty simply; there is an IPShellEmbed
> >> method which returns something you can call. But how could one do the
> >> same for the stock python interactive shell?
>
> >> To take this out of the realm of debugging. What you want to do is to
> >> write a python program that goes into the python interactive shell -
> >> without having to write your own a read/eval loop and deal with
> >> readline, continuation lines, etc.
>
> >> The solution should also allow
> >> ?- variables/methods in the calling PYthon program to be visible
> >> ? ?in the shell
> >> ?- variables set in the interactive (sub) shell should persist after the shell
> >> ? ?terminates, although this is a weaker requirement. POSIX subshells
> >> ? ?for example *don't* work this way.
>
> >> There has been much written about how to embed Python from C, so I
> >> suppose this may offer one way. And at worst, I could write
> >> a C extension which follows how C Python does this for itself.
>
> >> But is there a simpler way?
>
> >> Thanks.- Hide quoted text -
>
> - Show quoted text -

One threat is malicious code; sorry for this.


From vivainio at gmail.com  Thu May 29 15:28:34 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 29 May 2008 19:28:34 GMT
Subject: ANN: IPython 0.8.3 is out
Message-ID: <8763swlxjx.fsf@gmail.com>

Hi all,

The IPython team is happy to release version 0.8.3, with lots of new
enhancements as well as many bug fixes, and updated documentation
that has been long in the coming.

We hope you all enjoy it, and please report any problems as usual.


WHAT is IPython?
----------------

1. An interactive shell superior to Python's default. IPython has many
features for object introspection, system shell access, and its own special
command system for adding functionality when working interactively.

2. An embeddable, ready to use interpreter for your own programs. IPython can
be started with a single call from inside another program, providing access to
the current namespace.

3. A flexible framework which can be used as the base environment for other
systems with Python as the underlying language.

4. A shell for interactive usage of threaded graphical toolkits. IPython has
support for interactive, non-blocking control of GTK, Qt and WX applications
via special threading flags. The normal Python shell can only do this for
Tkinter applications.


Where to get it
---------------

IPython's homepage is at:

http://ipython.scipy.org

and downloads are at:

http://ipython.scipy.org/dist

We've provided:

      - Source download (.tar.gz)
      - A Python Egg (http://peak.telecommunity.com/DevCenter/PythonEggs).
      - A native win32 installer. 
      - rpm's

Note that win32 users also need to get pyreadline, available at the same
download site (http://ipython.scipy.org/dist). You should also read of 
additional considerations at http://ipython.scipy.org/moin/IpythonOnWindows

We note that IPython is now officially part of most major Linux and BSD
distributions, so packages for this version should be coming soon, as the
respective maintainers have the time to follow their packaging procedures.
Many thanks to Jack Moffit, Norbert Tretkowski, Andrea Riciputi, Dryice Liu
and Will Maier for the packaging work, which helps users get IPython more
conveniently.

Many thanks to Enthought for their continued hosting support for IPython.


Release notes
-------------

See 

http://ipython.scipy.org/moin/WhatsNew083

for notable new features in this release.


Enjoy, and as usual please report any problems.


The IPython team.


From duncan.booth at invalid.invalid  Tue May 20 06:04:17 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 May 2008 10:04:17 GMT
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
Message-ID: <Xns9AA470833CCA8duncanbooth@127.0.0.1>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:

>>>> a = 'this is longer'
>>>> b = 'this is longer'
>>>> a == b
> True
>>>> a is b
> False
>>>> 
> 
> In the above example, Python has created only one string called
> 'hello' and both x and y reference it. However, 'this is longer' is
> two completely different objects. 

That is true when run interactively, but the behaviour changes again if you 
run it as a script:

C:\Temp>type t.py
a = 'this is longer'
b = 'this is longer'
print a is b

C:\Temp>t
True

In short, two equal strings may or may not be identical and any code which 
makes assumptions based on observed behaviour is broken. If you want to be 
able to test identity on strings safely then use the 'intern()' builtin to 
get repeatable behaviour.

-- 
Duncan Booth http://kupuguy.blogspot.com


From skanemupp at yahoo.se  Fri May  2 11:55:45 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 08:55:45 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
Message-ID: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>

if pygame.key.get_pressed[K_a]:
            print "Muppet"

K_a is not defined.


but yes it is. why do i get this error?

this works:
if pygame.key.get_pressed():
        print "donkey"


From wgumgfy at gmail.com  Fri May  9 02:47:46 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Thu, 8 May 2008 23:47:46 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<9vo724prqd0etqlraapsv8e3j6bcigh5ea@4ax.com>
Message-ID: <68iacjF2sq5gcU1@mid.individual.net>

J?rgen Exner wrote:
> "Waylen Gumbal" <wgumgfy at gmail.com> wrote:
> > Sherman Pendley wrote:
> > > kodifik at eurogaran.com writes:
> > > >
> > > > > PLEASE DO NOT | :.:\:\:/:/:.:
> > > > > FEED THE TROLLS | :=.' - - '.=:
> > Not everyone follows language-neutral groups (such as
> > comp,programming as you pointed out), so you actually reach more
> > people by cross posting.
>
> You seem so have failed to grasp the concept of why Usenet is divided
> into separate groups in the first place.

No, not really. You keep group specific content in the applicable group 
or groups only. But are there not times where content overlaps the 
topics of multiple groups and to get maximum feedback, post to all 
applicable groups (the keyword being "applicable") ?

-- 
wg 




From zxo102 at gmail.com  Sat May 24 18:36:50 2008
From: zxo102 at gmail.com (zxo102)
Date: Sat, 24 May 2008 15:36:50 -0700 (PDT)
Subject: Hexadecimal: how to convert 'ED6F3C01'  to "\xED\x6F\x3C\x01" in 
	python coding?
Message-ID: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>

Hi,
   how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
"\xED\x6F\x3C\x01" in python coding?
When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
the error information : invalid \x escape.
   Thanks.

ouyang


From inhahe at gmail.com  Tue May  6 09:35:05 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 6 May 2008 09:35:05 -0400
Subject: select.poll() and WSAPoll
References: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
	<mailman.648.1210078345.12834.python-list@python.org>
Message-ID: <q7ZTj.71501$vr3.59121@bignews2.bellsouth.net>


> I don't think we can officially support WPAPoll since Python 2.6 is
> suppose to run on Windows 2000 and XP, too.
>
> Christian
>

Oh, yeah, I was wondering about that, since there aren't separate 
distributions of Python for Vista vs. XP etc.  But I wonder if Python could 
just give an attribute error, or perhaps some other error, for select.poll 
if it's not running on Vista, perhaps some kind of run-time detection if 
it's vista or if wsapoll is available?  or even an installation time thing? 
Since there's nothing promising that select.poll will work on windows 
anyway.  or does it just not work like that? :e

although a third party module would be nice too (if anyone out there has 
vista..:)




From wizzardx at gmail.com  Sun May  4 13:33:49 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 19:33:49 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
	<18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>
	<eba8281a0805040828h2a570635ife21b553c1380e51@mail.gmail.com>
Message-ID: <18c1e6480805041033v1ae0a3adra3710e1414da0110@mail.gmail.com>

On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> I can grab the image,  I need a way of grab the region size with the mouse,
> a easy way of the user select a region of the image to analyze, something
> like the  "Rectangle selection tool" of gimp.
>

I assume what you want to do is allow the user to drag the mouse
across your desktop, and your program, running in the background,
picks this up? As opposed to the user making a rectangular selection
entirely within your app.

I think the simplest way to do this is to capture the entire screen,
then show it as an image on a window covering the entire screen (eg:
fullscreen mode, or a regular window without decorations).  Then
listen for mouse events. There should be a way to show the 'rectangle
elastic band' at the same time. Otherwise just draw a rectangle
between where the user first clicked and where the mouse is now (until
they release the mouse button).

Another way would be to listen to all events sent through X, and act
based on the mouse events. VNC does something similar.

A good starting point would be the Python xlib libraries:

http://python-xlib.sourceforge.net/

David.


From mensanator at aol.com  Fri May  2 13:18:20 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 2 May 2008 10:18:20 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
Message-ID: <e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>

On May 2, 9:53?am, Michael Torrie <torr... at gmail.com> wrote:
> Shawn Milochik wrote:
> > How does one "plonk" stuff from Google Groups? Specifically, how
> > can this be done in Gmail?
>
> Set up a filter that looks for some phrase in the mail headers that
> identifies messages originating from google groups. ?Gmail's filters are
> fairly flexible. ?I'd probably just have it look for certain words.
> Look at an e-mail's source (raw view) and particularly check in the
> headers for things to filter by.

Why don't you just block all messages from Gmail?


From python at bdurham.com  Thu May  8 12:47:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 08 May 2008 12:47:47 -0400
Subject: Given a string - execute a function by the same name
In-Reply-To: <jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.291.1209400412.12834.python-list@python.org>
	<jXFUj.176259$D_3.27868@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <1210265267.25069.1252128141@webmail.messagingengine.com>

Andrew,

> > I'm parsing a simple file and given a line's keyword, would like to call the equivalently named function.

> No, actually, you wouldn't :-)  Doing so means that if your programs input specification ever changes, you have to rename all of the relevant functions. Moreover, it leaves open the possibility that you might wind up calling a function you didn't intend.

I'm using Arnaud Delobelle's technique (see below) to insure that only
the appropriate methods are called. A great, practical example of a
decorator.

<snip>
functions = {}

def register(func):
    functions[func.__name__] = func
    return func

@register
def foo(): print "Foo!"

@register
def bar(): print "Bar!"

>>> functions
{'foo': <function foo at 0x6f2f0>, 'bar': <function bar at 0x6f330>}
>>> functions['bar']()
Bar!
</snip>

Thanks for your feedback,

Malcolm


From wolfgang.lipp at gmail.com  Fri May 23 15:06:01 2008
From: wolfgang.lipp at gmail.com (_wolf)
Date: Fri, 23 May 2008 12:06:01 -0700 (PDT)
Subject: matploblib communication problem, graphics question
Message-ID: <dfc54996-3bb3-419b-8cd7-212fefa8469d@b1g2000hsg.googlegroups.com>


i've had a hard time today to drill down on some infos
about matplotlib of http://matplotlib.sourceforge.net/.
this is an sf.net-managed project, its mailing lists are
managed by <shudder/> gnu mailman in a pre-1994 version.

still there is a sf.net standard forum interface, which
however denies me to post. i've set up an account on
sourceforge---not an experience i need; boarding an
intercontinental flight is swift in comparison.

but having an account on sf.net is not enough to post to
a mailing list there, so i filled out a second longish
form to subscribe to the list thru the <horrors/>
mailman interface. i had to re-enter my email address.

now what is left to me is to try writing directly to
matplotlib-users at lists.sourceforge.net and then scoop
it up on http://sourceforge.net/mailarchive/forum.php?forum_name=matplotlib-users

as it is so incredibly hard to make oneself heard on
the matplotlib list, i realized that questions from
outsiders are maybe not welcome, so i do a cross-post
to reach more audience.

i need to do some raster-image scaling and i've been
hunting hi and lo for a python library that can do that.
so far choices are (in order of perceived aptness)::

  imagemagick of old,

  pythonware.com/products/pil,

  antigrain.com,

  matplotlib,

  cairo of cairographics.org.

Cairo is definitely may favorite here. i know with
certainty that cairo is good at scaling images, as
firefox3 is using it to achieve a smoothness and
readability in scaled images that rivals the quality
of safari?s.

but i have been unable to uncover any information
about raster-image scaling in cairo---can?t be, right?
an open source project that becomes part of firefox3
and i can?t find out how to use their flagship
functionality?

so i went to matplotlib. i now have these methods to
open image files with matplotlib::

  def get_image_jpg():
    import Image
    from pylab import *
    import numpy
    print dir( numpy )
    from numpy import int8, uint8
    # these lines are incredible -- just open that damn jpg. can be as
simple as `load(route)` -- ALL the pertinent
    # information well be in time derived from the route and the
routed resource structure (the router, and the
    # routee). pls someone giveme a `MATPLOBLIB.read()`, a
`MATPLOBLIB.load()`, or a `MATPLOBLIB.get()` already.
    image = Image.open( image_locator )
    rgb = fromstring( image.tostring(), uint8 ).astype( float ) /
255.0
    # rgb = resize( rgb,( image.size[ 1 ], image.size[ 0 ], 3 ) )
    rgb = resize( rgb,( 100, 150, 3 ) )
    imshow( rgb, interpolation = 'nearest' )
    axis( 'off' ) # don?tdisplaytheimageaxis
    show()

  def get_image_png( image_locator ):
    from pylab import imread as _read_png
    from pylab import imshow as _show_image
    from pylab import gray
    from pylab import mean
    a = imread( image_locator )
    #generates a RGB image, so do
    aa=mean(a,2) # to get a 2-D array
    imshow(aa)
    gray()

quite incredible, right? it can somehow be done, but
chances are you drown in an avalanche of boiler plate.
and sorry for the shoddy code, i copied it from their
website.

so they use pil to open an image file. pil?s image
scaling is 1994, and the package is hardly maintained
and not open. yuck. whenever you have a question
about imaging in python people say ?pill? like they
have swallowed one.

let?s face it, pil is a bad choice to do graphics.
here i did install pil, because matplotlib seemed to
be basically handling raster-images and image
transformations.

the matplotlib people have the nerve to put a short
doc to their root namespace items, as are, `axhspan`,
`cla`, `gcf`, and such more. this interface is
hardly usable. it shouldn?t be that hard to open an
image file in an image manipulation library. nobody
wants to maintain that kind of sphpaghetti.

i haven?t been succesful so far to find out how to
scale an image in cairo or matlotlib, or an other
alternative. please don?t sugggest doing it with
pil or imagemagick, i won?t answer.

is there any coherent python imaging interest group
out there? can i do it with pyglet maybe?

cheers & ~flow






From cjw at ncf.ca  Sat May 17 19:51:42 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Sat, 17 May 2008 19:51:42 -0400
Subject: help compiling Python on vs 2008!
In-Reply-To: <QZFXj.6721$255.5738@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
Message-ID: <g0nr2j$8do$1@theodyn.ncf.ca>

inhahe wrote:
> "Christian Heimes" <lists at cheimes.de> wrote in message 
> news:mailman.1270.1211029209.12834.python-list at python.org...
>> inhahe schrieb:
>>> what is going on here, and how do I compile these external libraries?
>> I assume you are trying to compile Python 2.5 with VS 9.0. It's not
>> supported. Some extensions don't compile under VS 9.0
>>
>> Christian
>>
> 
> I just installed Visual Studio 8 and tried compling and I bgot the same 
> problem.  hope this isn't a redundant post. i don't know if 
> pyhon-list at python.org reposts here.
> 
> 
You might consider working with Python 
2.6, which does compile with Visual 
Studio C++ 2008 and running the test 
(Tools\Buildbot\rt.bat) produces very 
few errors.  Just remember that 2.6 is 
tsill at the alpha stage of development.

Colin W.


From gandalf at shopzeus.com  Wed May 21 09:46:39 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 15:46:39 +0200
Subject: problem with import / namespace
In-Reply-To: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
Message-ID: <483427BF.6030805@shopzeus.com>

ohad frand wrote:
> Hi
> I have a problem that the solution to it must be very simple but i 
> couldnt fint it's answer in the internet so far (i searched for couple 
> of days)
> the problme is as follows:
>
> i have two directories e.g. "\\1" and "\\2"
> in each directory i have two files with the same names e.g. "tmp1.py" 
> and "tmp2.py"

So this is what you have:

/1/tmp1.py
/1/tmp2.py
/2/tmp1.py
/2/tmp2.py

> each tmp2.py file imports tmp1 from its same directory (import tmp1) - 
> thats the problem
> if i execute one file (\\1\tmp2.py) than the execution is ok
> but when i try after that to execute the second file (\\2\tmp2.py) 
> than the tmp1 file from the wrong directory ( - directory 1 in this 
> case) is imported instead.

When you try to import a module, python starts to search for it. The was 
it does the search is very well defined. It mostly depends on the 
current directory and sys.path. You can read more about this here:

http://docs.python.org/tut/node8.html#searchPath

This is very basic thing - you should read and go through the tutorial 
before asking questions like this. :-)

> i tried many things to try to solve it, i removed the previous path 
> from sys.path and added the new one, i tried to change current working 
> directory with os.chdir()
> I tried to delete from locals and from globals the name tmp1 before 
> running the second file but nothing worked.
> please help
The problem is still not well defined. Python works as expected and 
documented, but apparently you do not know how to import 1/tmp2.py from 
2/tmp1.py.  There are several ways to do it, and we cannot tell which 
one is correct. It depends on what are these modules for.

Here are the solution that you would use (most likely) as a beginner:


#1 first, rename your "1" and "2" directories to "one" and "two". If you 
are creating a package with modules, then you have to define the 
package's name with its directory. Since identifiers cannot begin with 
digits in Python, you need to use an identifier-like name for your 
subdirs. It is a good idea anyway. A package name called "1" would tell 
nothing about what it does?
#2 place your main application in /app/app.py
#3 create /app/one/__init__.py and /app/two/__init__.py files (they can 
be empty)
- inside your app.py file either make sure that the current dir is /app, 
or insert /app in the first place in sys.path


Then for example, inside two/tmp1.py you can do this:


import one.tmp1
import one.tmp2
import two.tmp1

one.tmp1.somefunc()
two.tmp1.somefunc()


You got the idea.

    Laszlo




From ganeshborse at gmail.com  Thu May  1 23:26:38 2008
From: ganeshborse at gmail.com (grbgooglefan)
Date: Thu, 1 May 2008 20:26:38 -0700 (PDT)
Subject: how to pass C++ object to another C++ function via Python 
	function
References: <1810b155-5598-4f17-a8e9-e4aa848db5de@i36g2000prf.googlegroups.com>
	<mailman.786.1208787451.17997.python-list@python.org>
	<be8f0bbf-8f24-405c-9de1-f3cc24be2620@p39g2000prm.googlegroups.com>
	<mailman.5.1208822092.6645.python-list@python.org>
Message-ID: <136a9a29-1193-4ebc-89de-7fa6b9c7dfd5@r9g2000prd.googlegroups.com>

On Apr 22, 7:54?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
> If you have a C function that receives a PyCObject, just include the ?
> relevant headers (cobject.h) and you can retrieve the original pointer ?
> using PyCObject_AsVoidPtr:
>
> void foo(PyObject *pyobj)
> {
> ? ?TOriginalType *porig;
> ? ?porig = (TOriginalType *)PyCObject_AsVoidPtr(pyobj);
> ? ?// do something with porig
> }
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

This works. But only once, means if I try to use this object second
time in Python function it causes crash.

What I am doing in my program is that I am putting STL map in a
structure & passing that structure as object to a Python function
alongwith other agurments of that Python function. This briefly as
below:

// In pyinterface.h file:---
typedef hash_map<char*,int> Elements;
typedef hash_map<char*,Elements*,StringHash,eqstr>
PerExchGroupsElementsTable;
typedef struct capsule {
        PerExchGroupsElementsTable* refgrps;
} *pcapsule;

// In pyinterface.cpp file:---
numvars = // value set depending on number of variables of that python
function
PyObject *pTuple = PyTuple_New(numvars);

// Set variables as below:
for(nCtr = 0; nCtr < numvars; nCtr++){
     slot = prul->pVarLst[nCtr].slot;
     ndtyp = ordvars[slot].dtype;
     switch(ndtyp){
       case(INT_T):
 
PyTuple_SetItem(pTuple,nCtr,PyInt_FromLong(ordvars[slot].nvalue));
           break;
       case(FLOAT_T):
 
PyTuple_SetItem(pTuple,nCtr,PyFloat_FromDouble(ordvars[slot].fvalue));
           break;
       case(STRING_T):
 
PyTuple_SetItem(pTuple,nCtr,PyString_FromString(ordvars[slot].cvalue));
           break;
       default:
           printf("\nUnknown data type [%d] for %s\n",ndtyp,prul-
>pVarLst[nCtr].var);
           bUnknownDataType = true;
           break;
     }
     if(bUnknownDataType){
        ret = -1;
        break;
     }
}

// Then set the C++ object as below:
if(ret == 0){
    capsule grpob;
    if(pGroups){
      grpob.refgrps = pGroups; // pGroups is pointer to
PerExchGroupsElementsTable map & is global.
      int ret = PyTuple_SetItem(pTuple,
(numvars-1),PyCObject_FromVoidPtr((void *)&grpob, NULL));
    }
    PyObject *pResult = PyObject_CallObject(pfunc,pTuple);
    if(PyErr_Occurred()){
       printf("error occured in PyObject_CallObject for %s\n",prul-
>pyobj.szPyRouteName);
       PyErr_Print();
    } else {
        printf("Python function passed, use its result for other
purposes as designed\n");
    }
    Py_XDECREF(pResult);
    Py_XDECREF(pTuple);
}

//---------- My Pythong module & functions in it -------------------
//PyObject* pfunc is a Python function which I compile dynamically &
add to my Python module as below:
// One of such dynamically compiled function is as below:
char pyfunction[]=\
"def TSE581(t22,t52,t1012,ob):
       if(co1(ob,t22,\"TSE_FUTURE_GRP\") and
like1(ob,t52,\"TSE_SECID_LST2\")):\n\
          print \"result is pass\"\n\
          return 1\n\
       else:\n\
          print \"result is fail\"\n\
          return 0\n";

// function parameter "ob" in this function definition is the one
which Im passing as CObject.

    PyObject *result = NULL;
    result =
PyRun_String(pyfunction,Py_file_input,_pPyDictionary,_pPyDictionary);
    if(PyErr_Occurred() || result == NULL){
        printf("Failed to compile function [%s]\n",func);
        PyErr_Print();
        return;
    }
    Py_XDECREF(result);
    result = NULL;
    PyObject *ptr = PyObject_GetAttrString(_pPyModule,fname);
    if(PyErr_Occurred() || *ptr == NULL){
        printf("PyObject_GetAttrString failed:%s",fname);
        return;
    }
    if(!PyCallable_Check(*ptr)){
       printf("%s not a callable Python code\n",fname);
       Py_XDECREF(*ptr);
       *ptr = NULL;
       return;
    }

// I've created dynamically loadble Python module & multiple functions
similar to above gets added dynamically to this module.
// Module has functions "co1" & "like1" in module's .cpp file. These
functions then use CObject - the struct capsule & map pointer in it.
static PyObject* merorderrouter_co1(PyObject* self, PyObject* args)
{
    printf("Contains function\n");
    int ret=0;
    char *arg1=NULL, *arg2=NULL;
    PyObject* voidcap=NULL;
    if(!PyArg_ParseTuple(args, "Oss", &voidcap,&arg1,&arg2)){
       printf("failed to get args\n");
       if(PyErr_Occurred())
         PyErr_Print();
       return(PyInt_FromLong(ret));
    }
    printf("key=%s, grpname=[%s]\n",arg1,arg2);
    if(voidcap && PyCObject_Check(voidcap))
       printf("valid Py-C-Object\n");
    else
       printf("NOT a valid Py-C-Object\n");
    pcapsule pobj = (pcapsule)PyCObject_AsVoidPtr(voidcap);
    if(pobj){
       PerExchGroupsElementsTable grpmap = *pobj->refgrps;
       if(grpmap.count(arg2)){
         PerExchGroupsElementsTable::iterator grpmi =
grpmap.find(arg2);
         Elements grpelems = *(Elements*)grpmi->second;
         Elements::iterator ei = grpelems.find(arg1);
         if(ei != grpelems.end()){
            printf("has elm.\n");
            ret=1;
         } else {
            printf("no elm.\n");
            ret=0;
         }
       }
    } else {
          printf("pcapsule object is null from PyCObject_AsVoidPtr
\n");
          if(PyErr_Occurred())
            PyErr_Print();
    }
    printf("------- co returning.....\n");
    return PyInt_FromLong(ret);
}
//=======================================================

What happens is that when Python function TSE581 gets called from my C
Program via PyObject_CallObject (as shown at top of this post), co1
function works fine & can access the map pointer properly.
But when next function like1 gets called, crash happens.

My queries are & things on which I need help are:
1) Is there anything wrong I am doing when I am passing the C-Object
from my C++ code->Python -> C++ code again?
2) Am I missing to increase or decrease the reference count somewhere.
3) I dont want map pointer to be ever freed because it is Process
level data structure & requried at every execution of these Python
functions. How do I avoid its cleanup when it gets passed to Python &
Python cleans up those objects.

If want to see my Python module & the CPP code using it, I can send
all my source code to you.
Please help.


From zephyrfalcon!NO_SPAM! at gmail.com  Fri May 16 17:23:43 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Fri, 16 May 2008 17:23:43 -0400
Subject: save dictionary for later use?
In-Reply-To: <ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <PWmXj.46797$3v1.36691@bignews3.bellsouth.net>

globalrev wrote:

> pickle.dumps(mg)
> pickle.load(mg)
> 
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

The 'loads' and 'dumps' methods use strings:

 >>> import pickle
 >>> d = {"this": 42, "that": 101, "other": 17}
 >>> s = pickle.dumps(d)
 >>> s
"(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
 >>> pickle.loads(s)
{'this': 42, 'other': 17, 'that': 101}

If you want to store to / restore from file, use 'dump' and 'load':

# write to file 'out'...
 >>> f = open("out")
 >>> f = open("out", "wb")
 >>> pickle.dump(d, f)
 >>> f.close()

# restore it later
 >>> g = open("out", "rb")
 >>> e = pickle.load(g)
 >>> g.close()
 >>> e
{'this': 42, 'other': 17, 'that': 101}

Also see http://docs.python.org/lib/pickle-example.html.

Hope this helps!

--Hans


From p5secr2 at uni-jena.de  Mon May 19 10:30:53 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:30:53 +0200
Subject: scope of optional arguments
Message-ID: <g0s2v3$fa6$01$1@news.t-online.com>

If I call

print walk([1,2,3], [])
print walk([5,6,7])

I get

[1, 2, 3]
[4, 5, 6]

but when I call

print walk([1,2,3])
print walk([5,6,7])

I get

[1, 2, 3]
[1, 2, 3, 4, 5, 6]

at stdout, where

def walk(seq, result = []):
  for item in seq:
    result.append(item)
  return result

Does that mean that the scope of optional arguments is global if they aren't 
used and local if they are (or am I missing something here)?

Regards,
CS 




From grante at visi.com  Wed May  7 12:24:40 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 07 May 2008 11:24:40 -0500
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <hJKdnXs_Bf1VSrzVnZ2dnUVZ_tvinZ2d@visi>

On 2008-05-07, parag_paul at hotmail.com <parag_paul at hotmail.com> wrote:

> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax, I need to understand what could be
> the prupose of another scripting language

Python is a general purpose programming language like Java,
Smalltalk, Pascal, etc.

Its purpose is to allow a user to quickly write readable and
easily maintained programs.

> Cna you please help me with this,

Only you know whether/why you need to learn something.

> Is there a possibilty to work on bigger projects with Python

Yes.

-- 
Grant Edwards                   grante             Yow! Now I am depressed ...
                                  at               
                               visi.com            


From bockman at virgilio.it  Sun May 25 03:05:16 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 25 May 2008 09:05:16 +0200
Subject: finding icons for Apps
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <pan.2008.05.25.07.05.16.388806@virgilio.it>

On Sat, 24 May 2008 21:42:57 -0700, Sanoski wrote:

> This might be a dumb question. I don't know. I'm new to all this. How
> do you find icons for your programs? All GUI applications have cool
> icons that represent various things. For instance, to save is often
> represented as a disk, etc. You know, the small little picture
> references that give meaning to the phrase 'Graphical User Interface'.
> But I'm not a graphics artist! Drawing is simply one talent that
> skipped me completely. Where can I find icons to use with my programs?
> 

Many GUI toolkit ( like wx and gtk ) have a standard stock of icons for
common tasks ( load, save, ok, cancel, ...). 

Ciao
----
FB


From castironpi at gmail.com  Mon May 12 01:30:58 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 22:30:58 -0700 (PDT)
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
	<h10f24p4a00pmjbe21m70u0g0gppc2e6fj@4ax.com>
Message-ID: <6b70f4c2-1a05-40e6-bec3-15ac7dd51d21@m73g2000hsh.googlegroups.com>

On May 11, 6:26?pm, Tim Roberts <t... at probo.com> wrote:
> wxPytho... at gmail.com wrote:
>
> >If you are in the interactive prompt of the Python interpreter and you
> >do this
>
> >print """Testing\""" ? or ? print '''Testing\'''
>
> >you get three dots [...] as if Python expects a code block.
>
> ...which it does.
>
> >If you
> >press Enter, you get three dots again, and again, and again... You
> >can't get out of the code block with pressing the Enter key; you have
> >to press Ctrl+Z (if you're in Linux) in order to get out of that code
> >block,
>
> No, you don't. ?You can also enter """ or ''' to properly close the quote.
>
> >If you do
>
> >print "Testing\" ? or ? print 'Testing\'
>
> >you get an error, but not of you use the triple quotes. Is that a bug
> >in the interpreter perhaps?
>
> As a general rule, when you are just beginning to learn some product, it is
> safe to assume that anything you see as a bug in the product is almost
> certainly a flaw in your understanding of the product.
> --
> Tim Roberts, t... at probo.com
> Providenza & Boekelheide, Inc.

I hold further, it is more profitable, unless you can change it.


From bj_666 at gmx.net  Wed May 28 06:03:02 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 May 2008 10:03:02 GMT
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
Message-ID: <6a4oumF3464loU1@mid.uni-berlin.de>

On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:

> Dennis Lee Bieber, the ghost:
>> I'd have to wonder why so many recursive calls?
> 
> Why not?

Because of the recursion limit of course.  And function call overhead in
Python is quite high compared to an iterative approach.

Ciao,
	Marc 'BlackJack' Rintsch


From daveparker at flamingthunder.com  Tue May 13 12:20:26 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 09:20:26 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
Message-ID: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>

> 5-10 times faster for what kind of code?

Mostly numerical analysis and CGI scripting.  All of Flaming Thunder's
library code is in assembly language, and Flaming Thunder creates
statically-linked pure syscall CGI scripts.

> I don't see anything that resembles OO features of python, ...

True.  But in Python, you don't see statically-linked pure-syscall CGI
scripts being cross-compiled under Windows for ftp'ing up to a Linux
server.  And you don't see the speed of pure assembly language
libraries.  And I'll be willing to bet that Flaming Thunder will have
OO features similar to Python before Python has the features that
Flaming Thunder already does.

For many people, being 5 to 10 times faster at numerical analysis and
CGI scripting is reason enough to pay $19 per year.  But maybe for
other people, having slow, inefficient programs and websites is
acceptable.

> And what is really expensive is brain-cycles, not cpu-cycles.

Depends on whether you're the programmer, or the customer.  I've found
that customers prefer products that are 5 to 10 times faster, instead
of products that were easy for the developer.

And I disagree that Flaming Thunder requires more brain-cycles.
Because it's based on leveraging existing English and math fluency
(which was one of the original goals of Python, was it not?), I think
that Flaming Thunder requires fewer brain-cycles because fewer brains
cells have to be devoted to memorizing language peculiarities.

> Let alone it is
> very much a question of view-point if two different looping constructs or
> keywords are more awkward than one general looping-concept with only one
> keyword. It's a matter of taste.

Perhaps.  But if elementary school students can easily understand why
one programming language gives the answer 100 (Flaming Thunder):

  Write 10^2.

but can't understand why another programming language gives the answer
8 (Python):

  Print 10^2

then I think the comparison moves beyond a matter of taste into the
realm of measurable ease-of-use.

On May 13, 9:50?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Also, several users have rewritten their Python programs in Flaming
> > Thunder, and found that Flaming Thunder was 5 to 10 times faster
> > (Flaming Thunder compiles to native executables). ?So again, since
> > many people value their time at more than $0, I think that many people
> > will find that Flaming Thunder is worth $19.95 per year.
>
> 5-10 times faster for what kind of code? I don't see anything that resembles
> OO features of python, let alone more advanced concepts like
> meta-programming, higher-order functions and such. Which save tremendous
> amounts of time coding. If FT grows these and *still* is 5-10 times faster,
> I'll salut you.
>
> And what is really expensive is brain-cycles, not cpu-cycles. Which above
> described features save.
>
> > Plus, me getting paid to work on Flaming Thunder is far more
> > motivating than me not getting paid to work on Python. ?This weekend,
> > Python users will still be debating how to fix awkwardnesses in the
> > languages (such as FOR loops where you're just counting the loops and
> > not referencing the loop variable) -- but Flaming Thunder users will
> > be getting work done using the REPEAT n TIMES constructs that I'll be
> > implementing.
>
> > Python has been around about 15 years, yet still has those
> > awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> > those awkwardnesses are already getting fixed. ?The difference: I
> > can't afford to ignore users.
>
> Oh *please*! Try getting nearly as feature & library complete as python is
> today - and *then* I'll point to all the akwardness of FT. Let alone it is
> very much a question of view-point if two different looping constructs or
> keywords are more awkward than one general looping-concept with only one
> keyword. It's a matter of taste.
>
> Diez



From grflanagan at gmail.com  Tue May 27 03:57:21 2008
From: grflanagan at gmail.com (Gerard Flanagan)
Date: Tue, 27 May 2008 00:57:21 -0700 (PDT)
Subject: Using poplib to parse headers
References: <mailman.1628.1211841624.12834.python-list@python.org>
Message-ID: <e7543f55-445e-4bd9-8bc3-824329534c3c@a70g2000hsh.googlegroups.com>

On May 27, 12:39 am, Jean-Claude Neveu <jcn-france1... at pobox.com>
wrote:
> Hello,
>
> I am writing a Python program to check email using POP3. I've tried
> the sample code from python.org, and it works great. In other words,
> the code below successfully prints out my emails.
>
> import getpass, poplib, email
> M = poplib.POP3('mail.blah.com')
> M.user('username')
> M.pass_('password')
> numMessages = len(M.list()[1])
> for i in range(numMessages):
>      for j in M.retr(i+1)[1]:
>          print j
> M.quit()
>
> However, if I understand right, the Python poplib library will also
> parse the email for me so that I can iterate through the headers,
> body, etc, of each message, and use them in my program. I think the
> method I need to use is email.message_from_file, but I'm having
> difficulty getting it to work. Can anyone explain me how I would
> extend the above example to do this?
>
> I tried to do this by using in the i loop the line:
>
>         message = email.message_from_file(j)
>
> but I get the error: "AttributeError: 'str' object has no attribute 'readline'"
>
> Please forgive this very basic question. I do most of my programming
> in PHP and I'm just getting started with Python.
>
> Many thanks,
>
> J-C

Here's something I wrote when I was learning Python:

http://gflanagan.net/site/python/pagliacci/pagliacci.py.html

HTH (if you can decipher it!)

Gerard


From heikki at osafoundation.org  Fri May  2 15:41:12 2008
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 02 May 2008 12:41:12 -0700
Subject: Python and SOAP status
Message-ID: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>

I have started researching the Python SOAP (and web services in general)
options out there. Python 2.5 should be supported.

I used Python for some web services stuff (demo quality) a few years
back without major problems. However, it seems many of the libraries I
remember from that time have become dormant or have been explicitly
discontinued. A colleague also commented that he run into lots of
problems trying to use Python for SOAP a year ago.

What is your experience with Python SOAP, WSDL etc. libraries? What are
the good, maintained options out there right now? How is standards
compliance, how robust are the libraries, how do they interoperate with
other libraries written in other languages (I am especially interested
in interoperability with Java and PHP web services stacks).

It seems like the top 3 candidates on my list are ZSI
(http://pywebsvcs.sourceforge.net/), soaplib
(http://trac.optio.webfactional.com/) and suds
(http://trac.optio.webfactional.com/). If you have any experience in
using these, I'd very much like to hear from you.

There was quite a depressing post about ZSI's status at
http://www.kunxi.org/archives/2008/01/pythonsoap-second-encounter/.

-- 
  Heikki Toivonen


From gherron at islandtraining.com  Tue May  6 19:02:34 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 06 May 2008 16:02:34 -0700
Subject: open filename with spaces in path
In-Reply-To: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <4820E38A.7090903@islandtraining.com>

Michael Robertson wrote:
> I'm having trouble opening a file in linux, whose path has spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
> >>> open('./my test/test.txt')
> Exception

This works just fine for me.  No need to escape the spaces.

You haven't given us much to work with -- tell us what exception you 
get.    (Or just look at it carefully yourself.)   Whatever the problem 
is, I don't believe it has anything to do with the spaces.

Gary Herron


>
> >>> open('./my\\ test/test.txt')
> Exception

> but yet...
>
> >>> import os
> >>> os.chdir('./my test')
> >>> open('./test')
>
> works just fine.
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From pete.forman at westerngeco.com  Fri May 30 04:05:13 2008
From: pete.forman at westerngeco.com (Pete Forman)
Date: Fri, 30 May 2008 09:05:13 +0100
Subject: code of a function
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
	<483E6B8D.6020307@islandtraining.com>
	<mailman.1741.1212074713.12834.python-list@python.org>
	<RuG%j.37511$3j.21433@trnddc05>
	<873d04c4-c902-4ed5-8c57-8af8c037f094@c19g2000prf.googlegroups.com>
Message-ID: <tzggw72e.fsf@wgmail2.gatwick.eur.slb.com>

alex23 <wuwei23 at gmail.com> writes:

 > Which is very handy, like most of IPython.

+1 QOTW
-- 
Pete Forman                -./\.-  Disclaimer: This post is originated
WesternGeco                  -./\.-   by myself and does not represent
pete.forman at westerngeco.com    -./\.-   the opinion of Schlumberger or
http://petef.22web.net           -./\.-   WesternGeco.


From torriem at gmail.com  Fri May  9 10:38:57 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 09 May 2008 08:38:57 -0600
Subject: The del statement
In-Reply-To: <3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<3039eed5-503c-4356-9f1b-ded48fcff855@f63g2000hsf.googlegroups.com>
Message-ID: <48246201.1020301@gmail.com>

George Sakkis wrote:
> I think you're trying to imply that it is consistent with setting a
> value (same with getting). I guess what bugs me about "del" is that
> it's a keyword and not some universally well-known punctuation. Do you
> you feel that Python misses a "pop" keyword and respective
> expressions ?

Typically the word "pop" has a different meaning than you describe.
Most programmers think of pop in conjunction with push, for working with
FIFOs.  Normally pop would not be expected to take any arguments, or
maybe an argument of a number describing how many items to pop off of a
FIFO (stack).  Thus I don't think a pop method would be the right way to
go here.

I don't feel python misses a pop keyword because pop is already used as
methods of classes implementing stacks and FIFOs where appropriate.

> 
> (1) pop x: Remove x from the current namespace and return it.
> (2) pop x[i]: Instead of x.pop(i)
> (3) pop x.a: Equivalent to "_y=x.a; del x.a; return y"

The confusion over del does stem from it's behavior, so I can see where
you're coming from.  del doesn't delete anything; it just removes a
name.  However pop would be just as confusing in my opinion, given that
it's already associated with data structures.


From joe.p.cool at googlemail.com  Mon May 26 17:47:33 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Mon, 26 May 2008 14:47:33 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com><8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com> 
	<mailman.1588.1211765723.12834.python-list@python.org>
Message-ID: <484af5a1-4100-4782-b6dd-84d4d57337bf@e39g2000hsf.googlegroups.com>

On 26 Mai, 03:34, "Terry Reedy" <tjre... at udel.edu> wrote:
[...]
> | Please don't sell a missing feature as a philosophy.
>
> I won't if you don't claim that a feature is missing because you don't like
> its implementation. ?To most of us, replacing the nearly never used '__'
> with a keyword would be a auful change.

With "missing" I simply meant "not there".


> | Please don't tell me that encapsulation does not mean "enforced
> restriction".
>
> There are obviously degrees of enforced restriction. ?Take your TV example.
> Most users will respect a 'do not open' request by the manufacturer
> (Python's '_'.).

I program in Python quite often and I also use the '_' notation. But I
always found the inside/outside distinction very natural and
fundamental. The '_' notation is too informal and can arbitrarily be
overloaded with other meanings. I don't understand why it is so
important to avoid one keyword and paying for that by typing numerous
'_'. Underscore meaning is somewhat blurred - sometimes private,
sometimes protected. And it is line noise - like @$& in Perl.

> If you want something equivalent to epoxy embedding, design it, implement
> it, and share it (if you want). ?Perhaps one could make an Opaque extension
> class, perhaps even usable as a mixin class rather than as a single-base
> class.

Perhaps I'll give it a try - as soon as I have found out what you
mean :)


From mostro713 at gmail.com  Sat May  3 10:27:21 2008
From: mostro713 at gmail.com (mostro713 at gmail.com)
Date: Sat, 3 May 2008 07:27:21 -0700 (PDT)
Subject: Phyton module for Windows Event Viewer?
Message-ID: <0a2fdb47-cc66-4ba9-aa64-4b034b84a8a7@k13g2000hse.googlegroups.com>

Hi all,

Can someone point me in the right direction? I'm looking for a module
to monitor the Windows Event Viewer.

Thanks


From malaclypse2 at gmail.com  Thu May  8 09:24:14 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 8 May 2008 09:24:14 -0400
Subject: web client in Python Q
In-Reply-To: <DluUj.663832$us.393032@fe04.news.easynews.com>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
	<mailman.732.1210209312.12834.python-list@python.org>
	<DluUj.663832$us.393032@fe04.news.easynews.com>
Message-ID: <16651e80805080624m53ad2bc3jae2765cb78aa3a57@mail.gmail.com>

On Wed, May 7, 2008 at 11:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
> I wonder why it does not work with
>
>  http://stockcharts.com/webcgi/wb.exe?Data.web+SLW

It looks like that is a subscription site.  That makes things more
complicated, because it means you'll need to figure out how to log in,
then probably store cookies related to your session and offer them
back up to the web server on subsequent requests.  Python has modules
that help with these things (mostly in the urllib2 module if i recall
correctly), but it's not quite as straightforward as just fetching a
URL.

I don't have time to dig up an example at the moment, but if you're
still having trouble with it, I can try to pull something together
this weekend.

-- 
Jerry


From daveparker at flamingthunder.com  Wed May 28 17:46:44 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:46:44 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
Message-ID: <4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>

On May 28, 3:19?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Kind of like how this year's program won't work on next year's
> > Python?
>
> For somebody who has admitted to have only very rudimentary knowledge of
> python that's a pretty bold statement, don't you think?

Everthing I know, I learned from Wikipedia. ;)

http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_and_compatibility

"Like Perl 6, Python 3.0 will break backward compatibility. There is
no requirement that Python 2.x code will run unmodified on Python 3.0.
There are basic changes such as changing the print statement into a
print function (so any use of the print statement will cause the
program to fail) ..."


From sjmachin at lexicon.net  Mon May 12 08:30:58 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 12 May 2008 12:30:58 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <Xns9A9C83F62CA39duncanbooth@127.0.0.1>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
Message-ID: <48283881@news.mel.dft.com.au>

Duncan Booth wrote:
> Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
> 
>>>> is there a better way than my solution? is mine ok?
>>> ['%s%s' % (not i%3 and 'Fizz' or '', not i%5 and 'Buzz' or '')
>>>  or str(i) for i in xrange(1, 101)]
>>>
>>> -- Ivan
>> or, more correctly, if you actually need to "print":
>>
>> sys.stdout.write('\n'.join('%s%s' % 
>>     (not i%3 and 'Fizz' or '', not i%5 aBuzz' or '') 
>>     or str(i) 
>>     for i in xrange(1, 101)))
> 
> I think the variant I came up with is a bit clearer:
> 
> for i in range(1,101):
> 	print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i

More than a bit clearer, IMO. How about
     print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
(or perhaps
     print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
to save looking up the precedence rules) ?


From bj_666 at gmx.net  Fri May  2 05:29:19 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 09:29:19 GMT
Subject: get number that is raised to the power of
References: <mailman.446.1209719973.12834.python-list@python.org>
Message-ID: <68057fF2r409aU3@mid.uni-berlin.de>

On Fri, 02 May 2008 19:19:07 +1000, Astan Chee wrote:

> Hi,
> Im not sure if this is more of a math question or a python question. I 
> have a variable in python:
>  >>> v = 10.0**n
> is there a way to find the value of n if i know only v aside from 
> str(v).split('+')[1] ? that seems like too much of a hack and I was 
> wondering if there was a faster way of doing it?

That hack isn't even working properly because ``str(10.0**1)`` has no '+'
in its string representation.

Solution:

n = math.log(v, 10)

Ciao,
	Marc 'BlackJack' Rintsch


From dbpokorny at gmail.com  Sat May 17 00:20:58 2008
From: dbpokorny at gmail.com (dbpokorny at gmail.com)
Date: Fri, 16 May 2008 21:20:58 -0700 (PDT)
Subject: Rpy Module
References: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>
Message-ID: <ad4327b8-c98f-466f-90f1-347d9ce08a96@j33g2000pri.googlegroups.com>

On May 16, 3:14 pm, Mike P <michael.pearmain at tangozebra.com> wrote:
> Hi experts,
>
> I've just seen there is an R module, what i can't see easily is if you
> can / how to import other modules for R into the Rpy module
>
> Can anyone advise on this?
>
> Cheers
>
> Mike

Do you mean like this?

import rpy
rpy.r('require(MASS)')

HTH,
David


From tjreedy at udel.edu  Tue May 13 17:37:10 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:37:10 -0400
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <g0d1m4$ng9$1@ger.gmane.org>


"Rajarshi" <rajarshi.guha at gmail.com> wrote in message 
news:bac50564-a924-4a10-a64a-54caf0125b29 at 8g2000hse.googlegroups.com...
| Hi, I teach an introductory programming course in Python. As part of
| the introduction I'd like to highlight the usage of Python in
| industry. The idea is to show that there are big players using Python
| for a variety of tasks. Given that the students come from a variety of
| backgrounds and are not necessarily 'hackers', I'm trying to look for
| examples with a bit of wow-factor.
|
| Is there any list with people/groups/companies using Python for
| impressive things?
|
| Any pointers would be appreciated

Besides the other comments, there was a thread about a month ago that give 
more python success stories (perhaps that was the title).





From castironpi at gmail.com  Wed May 14 07:59:15 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 04:59:15 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1043.1210676114.12834.python-list@python.org>
	<c8d3628f-8d7a-4eae-aa16-bbd8f16b54b5@u36g2000prf.googlegroups.com>
	<mdOdnfsVSIsm9LfVnZ2dnUVZ_h3inZ2d@earthlink.com>
Message-ID: <f96b3a6d-44f3-4a65-a715-caa57d88eccb@f63g2000hsf.googlegroups.com>

On May 13, 11:25?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 13 May 2008 04:14:16 -0700 (PDT), dannywebs... at googlemail.com
> declaimed the following in comp.lang.python:
>
> > So f is a list, rather than a file object, of which os.open would have
> > returned (my initial typo redirected the missive of this post, sorry!)
>
> ? ? ? ? Other than the facet that os.open() is low-level C file object and
> not a Python file object...
>
> ? ? ? ? What you have returned is a list of lines... Hmmm, if os.popen()
> supports .readlines() it might even support direct iteration
>
> for ln in os.popen():
> ? ? ? ? do something with the line
>
> ? ? ? ? Now the matter comes down to what each line looks like... It is NOT
> a "list" in Python terms, no matter what delimiters it has (and one of
> your examples doesn't even seem to be consistant -- [' .... ]' is not
> the same as [' .... '] )
>
> ? ? ? ? For space separated hostnames....
>
> for ln in os.popen(...): ? ? ? ?#assuming it works without a preread
> ? ? ? ? for host in ln.split():
> ? ? ? ? ? ? ? ? do something with host...
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Compositions can't have names in the singular case.


From davidreynon at gmail.com  Mon May 19 14:22:58 2008
From: davidreynon at gmail.com (korean_dave)
Date: Mon, 19 May 2008 11:22:58 -0700 (PDT)
Subject: sre_parse.py - over-view or explanation needed
Message-ID: <1cad446e-9828-479b-bf39-08bd2b02b1eb@b1g2000hsg.googlegroups.com>

What does sre_parse.py (Secret Labs' Regular Expression Engine) do?

I see this referred to in some errors when i call the source()
function

(e.g. source(findFile("scripts","thisonehere.py")) )

The error then refers to name "ImportWarning" not defined?? (<--that
might be a proprietary warning, as I am running another app on top of
Python (not really relevant)).

I am curious how the sre_parse.py module gets involved when neither
the name or the file has any regular expression or special parse rules
in it....

So I guess the first step is understanding sre_parse.py itself. Can
someone help me on that?

Thanks.


From musiccomposition at gmail.com  Sun May  4 22:08:25 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Sun, 4 May 2008 19:08:25 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <0e8aca56-5e92-4969-b34c-e27431c383f3@b1g2000hsg.googlegroups.com>

On May 4, 6:45 pm, notbob <not... at nothome.com> wrote:
> I'm trying to learn how to program.  I'm using:
>
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition
>
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.

Everybody is very nice on IRC, in forums, and here. We don't bite that
hard!
>
> nb



From chandran.ram28 at gmail.com  Sun May 11 00:18:54 2008
From: chandran.ram28 at gmail.com (chandran.ram28 at gmail.com)
Date: Sat, 10 May 2008 21:18:54 -0700 (PDT)
Subject: hai dear
Message-ID: <2d08b6f3-ce50-4620-bf15-04d02f63fee2@z16g2000prn.googlegroups.com>

hai friends,

"each day is a new adventure to dream search and discover"

www.goodhistory5.blogspot.com


From sjmachin at lexicon.net  Wed May  7 18:08:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 7 May 2008 15:08:56 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<m2fxsu55ri.fsf@googlemail.com>
	<55671aeb-fbd7-432e-b2f2-f558bc8e1702@s33g2000pri.googlegroups.com>
Message-ID: <063e90e7-ff78-405f-8b2b-42d9df3c454b@j33g2000pri.googlegroups.com>

On May 8, 6:00 am, umpsu... at gmail.com wrote:
> That's a great suggestion Arnaud.  I'll keep that in mind next time I
> post code. Thanks ;)
>

It's a suggestion for YOUR benefit, not ours. Consider keeping it in
mind next time you WRITE code, whether you intend publishing it or
not.



From wojtek.gminick.walczak at gmail.com  Tue May  6 06:55:55 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 12:55:55 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
Message-ID: <2c3c21060805060355sc81eb61t3af6989e978e0596@mail.gmail.com>

2008/5/6, Banibrata Dutta <banibrata.dutta at gmail.com>:
>  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>
>  So why not put symlink to Python over there on all machines, if we can
>  put one (or env itself) there ?

To avoid linking all the rest of interpreters like perl, ruby, lua and dozens
of others.

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From marlin_rowley at hotmail.com  Sat May 17 22:14:36 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Sat, 17 May 2008 21:14:36 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482F75DF.1020700@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>
	<482F0090.4030003@islandtraining.com>
	<BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
	<482F75DF.1020700@islandtraining.com>
Message-ID: <BAY135-W23FD5885A7B29CBF8534419FCA0@phx.gbl>

Gary,
 
That works.  And it's better than my solution:
 
#a = numpy.rollaxis(a,2,0)
#a = numpy.rollaxis(a,0,1)
#a = numpy.rollaxis(a,1,0)
 
Thanks!
 
-M



> Date: Sat, 17 May 2008 17:18:39 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com> CC: python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > Actually in my traversal of the never-ending maze of understanding > > arrays in python, I stumbled that the data in the wrong sequence.> >> > Let's get back to this transpose() deal, say we have these values as > > integers (representing rgba again):> >> > [[[0,1,2,3]> > [4,5,6,7]> > [8,9,10,11]> > [12,13,14,15]]> >> > [[16,17,18,19]> > [20,21,22,23]> > [24,25,26,27]> > [28,29,30,31]]]> >> > Now if I do this: transpose((2,0,1)), I get this:> >> > [[[0,4,8,12] [16,20,24,28]]> > [[1,5,9,13] [17,21,25,29]]> > [[2,6,10,14][18,22,26,30]]> > [[3,7,11,15][19,23,27,31]]]> >> > This is NOT what I want. I want the new array to be:> >> > [0,4,8,12][1,5,9,13]> > [2,6,10,14][3,7,11,15]> > [16,20,24,28][17,21,25,29]> > [18,22,26,30][19,23,27,31]> >> > How do I do this?> > That's s little ambiguous, but one of the following two > transpose-reshape-print's might be what you want.> > Gary Herron> > > import numpy> > a = numpy.array([[[0,1,2,3],> [4,5,6,7],> [8,9,10,11],> [12,13,14,15]],> > [[16,17,18,19],> [20,21,22,23],> [24,25,26,27],> [28,29,30,31]]])> > > print numpy.reshape(a.transpose(0,2,1), (8,4))> print numpy.reshape(a.transpose(0,2,1), (4,2,4))> > output is:> > [[ 0 4 8 12]> [ 1 5 9 13]> [ 2 6 10 14]> [ 3 7 11 15]> [16 20 24 28]> [17 21 25 29]> [18 22 26 30]> [19 23 27 31]]> > and> > [[[ 0 4 8 12]> [ 1 5 9 13]]> > [[ 2 6 10 14]> [ 3 7 11 15]]> > [[16 20 24 28]> [17 21 25 29]]> > [[18 22 26 30]> [19 23 27 31]]]> > > > >> > -M> >> >> >> >> >> > ------------------------------------------------------------------------> >> > > Date: Sat, 17 May 2008 08:58:08 -0700> > > From: gherron at islandtraining.com> > > To: marlin_rowley at hotmail.com> > > CC: python-list at python.org> > > Subject: Re: numpy.frombuffer != unpack() ??> > >> > > Marlin Rowley wrote:> > > >> > > > Very cool.> > > >> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > a represents a tile with height of 2 and width of 4 with 4 bits/pixel> > > > for each color.> > > >> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')> > > > this seperates the stream into individual values - Check> > > >> > > > > >>> b.shape=(2,4,4)> > > >> > > > This reshapes the array so that b.shape=(height,width,#bits/pixel) > > - Check> > > >> > > > >>> c = b.transpose((2,0,1))> > > >> > > > What does the (2,0,1) represent in terms of width and height and> > > > number of bytes?> > >> > > The (2,0,1) tells how to exchange the axes. For instance in a 2D array,> > > a normal transpose exchanges rows and columns. It will change a (a by> > > b) sized array into a (b by a) sized array. This would be equivalent to> > > the more saying interchange axes 0,1 to the new order of 1,0.> > >> > > In numpy with higher dimension arrays, the default transpose just> > > exchanges the first two axes, and the full transpose allows you to> > > specify exactly the new ordering of the exes.> > >> > > So transpose((2,0,1)) means take axes (0,1,2) to the new order> > > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being> > > of size (c by a by b) in size.> > >> > > In terms of implementation, there may not be *any* data re-arrangement> > > in a transpose. The only thing that needs changing is how the indices> > > are converted to an actual machine address of an indexed item. The> > > documentation notes this by saying transpose returns a "new view" of > > the> > > array. This explains why I copied the array before extracting bytes> > > out of it -- you really do need the elements in the new order for the> > > next operation.> > >> > > Gary Herron> > >> > > >> > > >> > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > > Date: Fri, 16 May 2008 17:08:20 -0700> > > > > From: gherron at islandtraining.com> > > > > To: marlin_rowley at hotmail.com; python-list at python.org> > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > >> > > > > Marlin Rowley wrote:> > > > > > All:> > > > > >> > > > > > Say I have an array:> > > > > >> > > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > > >> > > > > > How do I make it so that I now have:> > > > > >> > > > > > starting with first element (a[0])> > > > > > new_arr[0] = 'r'> > > > > > new_arr[1] = 'g'> > > > > > new_arr[2] = 'b'> > > > > > new_arr[3] = 'a'> > > > > > new_arr[4] = 'r'> > > > > > .....> > > > > >> > > > > > continuing "through" a[1] with the same new_arr> > > > > > new_arr[N] = 'r'> > > > > > new_arr[N+1] = 'g'> > > > > > ....> > > > > >> > > > > > -M> > > > >> > > > > Numpy can do this for you. First, do you really mean the array to> > > > > contain lists of one string each? If so:> > > > >> > > > > >>> import numpy> > > > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a> > > > > kludge here> > > > > >>> b> > > > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', > > 'b', 'a',> > > > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> > > > > 'b', 'b', 'a', 'a', 'a', 'a'],> > > > > dtype='|S1')> > > > > >>> b.shape=(2,4,4)> > > > > >>> b> > > > > array([[['r', 'r', 'r', 'r'],> > > > > ['g', 'g', 'g', 'g'],> > > > > ['b', 'b', 'b', 'b'],> > > > > ['a', 'a', 'a', 'a']],> > > > >> > > > > [['r', 'r', 'r', 'r'],> > > > > ['g', 'g', 'g', 'g'],> > > > > ['b', 'b', 'b', 'b'],> > > > > ['a', 'a', 'a', 'a']]],> > > > > dtype='|S1')> > > > > >>> c = b.transpose((2,0,1))> > > > > >>> c> > > > > array([[['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']],> > > > >> > > > > [['r', 'g', 'b', 'a'],> > > > > ['r', 'g', 'b', 'a']]],> > > > > dtype='|S1')> > > > > >>> d=c.copy() # To make it contiguous> > > > > >>> d.shape = (32,)> > > > > >>> d> > > > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', > > 'a', 'r',> > > > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> > > > > 'b', 'a', 'r', 'g', 'b', 'a'],> > > > > dtype='|S1')> > > > >> > > > > Done. Cool no?> > > > >> > > > > Gary Herron> > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > From: marlin_rowley at hotmail.com> > > > > > To: robert.kern at gmail.com; python-list at python.org> > > > > > Subject: RE: numpy.frombuffer != unpack() ??> > > > > > Date: Fri, 16 May 2008 17:31:30 -0500> > > > > >> > > > > > Thank you! That solved it!> > > > > >> > > > > > -M> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > >> > > > > > > To: python-list at python.org> > > > > > > From: robert.kern at gmail.com> > > > > > > Subject: Re: numpy.frombuffer != unpack() ??> > > > > > > Date: Fri, 16 May 2008 17:25:00 -0500> > > > > > >> > > > > > > Marlin Rowley wrote:> > > > > > > > All:> > > > > > > >> > > > > > > > I'm getting different floating point values when I use numpy> > > > > > vs. unpack().> > > > > > > >> > > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > > > > > buffer = unpack("!f", byte)> > > > > > > >> > > > > > > > frgba[0] != buffer[0]> > > > > > > >> > > > > > > > why? This is forcing me use the unpack() function since it's> > > > > > giving me> > > > > > > > the correct values. What am I doing wrong?> > > > > > >> > > > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > > > > > '>'). Most> > > > > > > likely, you are on a little-endian platform. All of the dtypes> > > > > > in numpy default> > > > > > > to the native-endianness unless specified. If you want to read> > > > > > big-endian data> > > > > > > using numpy, do this:> > > > > > >> > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > > > > > >> > > > > > > If you have any more problems with numpy, please join us on the> > > > > > numpy mailing> > > > > > > list. When reporting problems, please try to provide a small but> > > > > > complete> > > > > > > snippet of self-contained code, the output that you got, and> > > > > > explain the output> > > > > > > that you expected to get. Thank you.> > > > > > >> > > > > > > http://www.scipy.org/Mailing_Lists> > > > > > >> > > > > > > --> > > > > > > Robert Kern> > > > > > >> > > > > > > "I have come to believe that the whole world is an enigma, a> > > > > > harmless enigma> > > > > > > that is made terrible by our own mad attempt to interpret it as> > > > > > though it had> > > > > > > an underlying truth."> > > > > > > -- Umberto Eco> > > > > > >> > > > > > > --> > > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > E-mail for the greater good. Join the i?m Initiative from> > > > > > Microsoft.> > > > > >> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> > > > > >> > > > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > > E-mail for the greater good. Join the i?m Initiative from > > Microsoft.> > > > > >> > > > > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > > >> > > > > >> > > > > >> > > > > > ------------------------------------------------------------------------> > > > > >> > > > > > --> > > > > > http://mail.python.org/mailman/listinfo/python-list> > > > >> > > >> > > >> > > > > > ------------------------------------------------------------------------> > > > Keep your kids safer online with Windows Live Family Safety. Help> > > > protect your kids.> > > > > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > > >> > > > > > ------------------------------------------------------------------------> > > >> > > > --> > > > http://mail.python.org/mailman/listinfo/python-list> > >> >> >> > ------------------------------------------------------------------------> > Keep your kids safer online with Windows Live Family Safety. Help > > protect your kids. > > <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From banibrata.dutta at gmail.com  Fri May  9 09:30:17 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 19:00:17 +0530
Subject: Pythonwin
In-Reply-To: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
Message-ID: <3de8e1f70805090630k360bf584oebc5def114644538@mail.gmail.com>

oops moment!

I was wrong. indeed, you should find PythonWin there, if you installed
ActiveState Python.


On 5/9/08, Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>
> if one has installed ActiveState Python 2.5, I think it'd have been
>   Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
> and I think it delivers IDLE, not PythonWin.
>
>
> On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:
>>
>> On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
>> > Hi
>> >
>> > I am trying to use Python with ArcGIS.
>> >
>> > I have installed Python 2.4. I have an icon for IDLE and command line.
>> > I do not see Python PythonWin.
>> >
>> > How do you install or launch pythonwin??
>> >
>> > Thanks
>> >
>> > Clive
>>
>> I have PythonWin installed in my Start Menu --> Programs --> Python
>> 2.5. I may have installed the ActiveState version though. Just check
>> if it's there on your system and if not, you can follow Niklas's
>> advice.
>>
>> Mike
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
>
> --
> regards,
> Banibrata
> http://www.linkedin.com/in/bdutta
> http://octapod.wordpress.com




-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From BrianVanderburg2 at aim.com  Thu May  1 08:18:12 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 01 May 2008 08:18:12 -0400
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <4819B504.1000108@aim.com>

Lance Gamet wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.
>
> Thanks a lot.
> Lance
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
Lance Gamet wrote:
> Hi, python beginner starting a new project here.
>
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
>
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
>
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?
>
> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
>
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.
>
> Thanks a lot.
> Lance
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
One way I've just started to use it to create a utility function to 
return the location of the user data folder, depending on the operating 
system:

import os, sys

def GetUserDataDirectory():
    dir = None

    # WINDOWS
    if os.name == "nt":

       # Try env APPDATA or USERPROFILE or HOMEDRIVE/HOMEPATH
       if "APPDATA" in os.environ:
          dir = os.environ["APPDATA"]

       if ((dir is None) or (not os.path.isdir(dir))) and ("USERPROFILE" 
in os.environ):
          dir = os.environ["USERPROFILE"]
          if os.path.isdir(os.path.join(dir, "Application Data")):
             dir = os.path.join(dir, "Application Data"))

       if ((dir is None) or (not os.path.isdir(dir))) and ("HOMEDRIVE" 
in os.environ) and ("HOMEPATH" in os.environ):
          dir = os.environ["HOMEDRIVE"] + os.environ["HOMEPATH"]
          if os.path.isdir(os.path.join(dir, "Application Data")):
             dir = os.path.join(dir, "Application Data"))

       if (dir is None) or (not os.path.isdir(dir))
          dir = os.path.expanduser("~")

       # One windows, add vendor and app name
       dir = os.path.join(dir, "vendor", "app")

    # Mac
    elif os.name == "mac": # ?? may not be entirely correct
       dir = os.path.expanduser("~")
       dir = os.path.join(dir, "Library", "Application Support")
       dir = os.path.join(dir, "vendor", "app")

    # Unix/Linux/all others
    else:
       dir = os.path.expanduser("~")
       dir = os.path.join(dir, ".app")
       # Some applications include vendor
       # dir = os.path.join(dir, ".vendor", "app")

    return dir

   
Brian Vanderburg II
   


From gagsl-py2 at yahoo.com.ar  Mon May 12 05:24:50 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 06:24:50 -0300
Subject: Problem with help() in python/ipython interpreters
References: <62818f52-025a-48b1-b451-70abae1e6580@a23g2000hsc.googlegroups.com>
Message-ID: <op.ua1a3o00x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 20:45:09 -0300, Casey <Caseyweb at gmail.com> escribi?:

> I'm running python 2.5.2 on WinXP.  I've always used a GUI for
> interactive development, but I wanted to try out ipython which better
> supports matplotlib in this mode.  Unfortunately, whenever I try to
> use help() I get the following error:
>
> (Sys) The system cannot find the file specified.
>  "C:\documents"
>
> It turns out that the regular (python.exe) interpreter has the same
> problem.  I have the HTML docs installed, my PYTHONDOCS environment
> variable points to the HTML directory, and I actually uninstalled and
> reinstalled every library I use from scratch to make sure it wasn't
> some random config issue.

I don't know exactly how does help() try to find the documentation, but I have these differences:

- I don't have a PYTHONDOCS variable (nor PYTHONPATH nor anything similar)
- The Windows registry contains this entry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\2.5\Help\Main Python Documentation]
@="C:\\Apps\\Python25\\Doc\\Python25.chm"
- I *think* that I installed the HTML docs on that same directory a long time ago...

Hope this info could help you.

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Thu May 29 03:36:19 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 May 2008 07:36:19 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
Message-ID: <Xns9AAD55E793C9Dduncanbooth@127.0.0.1>

Dave Parker <daveparker at flamingthunder.com> wrote:

> Catch doesn't return just error types or numbers, it can return any
> object returned by the statements that are being caught; catch doesn't
> care what type they are.  For example:
> 
>   Writeline catch(set x to "hello world".).
> 
> will write "hello world".

I really don't get this. Surely the point about an error being thrown to a 
catch statement is that the error path is separate from the normal 
execution path? What you are doing here is ensuring that unexpected errors 
have no chance at all of propagating up to the top level: they are 
invariably going to get caught by some other handler that was installed 
just because someone was too lazy to write a set statement followed by a 
writeline.

-- 
Duncan Booth http://kupuguy.blogspot.com


From george.sakkis at gmail.com  Tue May 13 06:55:37 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 13 May 2008 03:55:37 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
Message-ID: <b03d5e07-efb5-479e-86df-f1e9bc33c774@m45g2000hsb.googlegroups.com>

On May 13, 6:18?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 06:34:03 -0300, <wxPytho... at gmail.com> escribi?:
>
> > Is that true that this comparison operators are gone in Python 3.0:
>
> > < ? ?(is less than)
> >> ? ?(is greater than)
> > <= (is less than or equals)
> >> = (is greater than or equals)
>
> > Is it true?
>
> May I ask *where* did you read that crazy idea?

My guess is that he heard about the TypeErrors to be raised when
comparing values of different types and he misinterpreted it,
deliberately or not.

George


From inhahe at gmail.com  Fri May 23 04:42:38 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 04:42:38 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
Message-ID: <BqvZj.2718$772.1718@bignews2.bellsouth.net>


"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4836772e$0$6097$426a74cc at news.free.fr...
> Brad a ?crit :
>> cm_gui wrote:
>>> Python is slow.
>>
>> It ain't C++, but it ain't a punch card either... somewhere in between. I 
>> find it suitable for lots of stuff. I use C++ when performance really 
>> matters tho... right tool for the job. Learn a good interpreted language 
>> (Pyhton) and a good compiled language (C or C++)
>
> LordHaveMercy(tm). Could you guys please learn what you're talking about?
>
> 1/ being interpreted or compiled (for whatever definition of these
> terms) is not a property of a language, but a property of an
> implementation of a language.

That's like saying being spherical is not a property of planets, it's a 
property of an instanciation of a planet.  Let alone that a) all known 
planets are spherical (all implementations of Python are not natively 
compiled (and you said for whatever definition)), and b) It's a far cry to 
imagine a planet coming into being that's not spherical (a language as 
dynamic as Python, or most other scripting languages, would be either 
extremely difficult or impossible to make a native compiler for).  I guess I 
should also mention that Python isn't very practical (as in "suitable", 
"right tool for the job", and "perfomance", as mentioned in the above post) 
without an implementation.  So I don't think this distinction has any use 
other than to beat other people over the head with a bat.

>
> 2/ actually, all known Python implementations compile to byte-code.
>

Which is then interpreted, but you're still technically right, because 
"compiled" can mean either compiled to bytecode or compiled to native code, 
despite what it actually did mean.  Semantics FTW!!








From martin at v.loewis.de  Sun May 11 18:35:32 2008
From: martin at v.loewis.de (=?ISO-8859-2?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 00:35:32 +0200
Subject: IDLE 3.0a5 has problems with Unicode
In-Reply-To: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
References: <13b7e4cc-031b-4c57-8212-9fe186d97324@e39g2000hsf.googlegroups.com>
Message-ID: <482774b4$0$11617$9b622d9e@news.freenet.de>

> Is this a known bug if IDLE 3.0a5 which will be fixed in the final
> release?

No, it's now a known bug (at least I don't know it). Whether or not it
gets fixed might depend on whether or not it gets reported to
bugs.python.org.

Regards,
Martin


From kyosohma at gmail.com  Tue May 13 09:19:26 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 06:19:26 -0700 (PDT)
Subject: Running compiled windows service python script
References: <mailman.1036.1210674040.12834.python-list@python.org>
Message-ID: <1a4d772f-3b61-4d10-9255-0d9fab6ec053@k37g2000hsf.googlegroups.com>

On May 13, 5:15?am, Aspersieman <aspersie... at gmail.com> wrote:
> Hi All
>
> I have a windows service (attached file). I basically just calls another
> script every 60 seconds. I can install, start and stop this service as
> expected with:
> ? ? ParseMailboxService.py install | start | stop
>
> The problem is: if I create an exe of this script (all required modules
> are included in the exe) with gui2exe (a frontend to py2exe) I can
> install the service - but not start it. The error it returns is "Error
> starting service: The service did not respond to the start or control
> request in a timely fashion."
>
> Is there something I need to additionally include in the compiled exe? I
> have manually included the following modules:
> ? ? * servicemanager
> ? ? * win32con
> ? ? * win32evtlogutil
> ? ? * win32serviceutil
>
> I would greatly appreciate any help.
>
> Regards
>
> Nicol
>
> --
>
> The three things to remember about Llamas:
> 1) They are harmless
> 2) They are deadly
> 3) They are made of lava, and thus nice to cuddle.
>
> ?ParseMailBoxService.py
> 2KDownload

I recommend re-posting to the PyWin32 user's group and possibly the
py2exe group.

http://mail.python.org/mailman/listinfo/python-win32
https://lists.sourceforge.net/lists/listinfo/py2exe-users

Alternatively, you can check these links out that are about creating
Windows Services in Python:

http://agiletesting.blogspot.com/2005/09/running-python-script-as-windows.html
http://essiene.blogspot.com/2005/04/python-windows-services.html
http://tgolden.sc.sabren.com/python/wmi.html

Hope that helps!

Mike


From skanemupp at yahoo.se  Mon May  5 08:04:31 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 05:04:31 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
Message-ID: <e8e0c496-d780-40e7-b3d5-5e92b07990c4@27g2000hsf.googlegroups.com>

On 5 Maj, 14:03, globalrev <skanem... at yahoo.se> wrote:
> On 5 Maj, 13:47, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
>
>
> > globalrev wrote:
> > >http://www.pygame.org/docs/ref/mixer.html
>
> > > import pygame
>
> > > #pygame.mixer.init(frequency=22050, size=-16, channels=2,
> > > buffer=3072)  //it complained abiout words=
> > > so i guess its only the nbrs should be there//
>
> > > pygame.mixer.init(22050, -16, 2, 3072)
> > > pygame.mixer.music.load("example1.mp3")
> > > pygame.mixer.music.play(loops=1, start=0.0)
>
> > > Traceback (most recent call last):
> > >   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> > > <module>
> > >     pygame.mixer.music.load("example1.mp3")
> > > error: Couldn't read from 'example1.mp3'
>
> > Give it the full path to the MP3. Be aware of backward slashes + the need to
> > escape them.
>
> > Diez
>
> escape them?
>
> import pygame
>
> #pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=3072)
> pygame.mixer.init(22050, -16, 2, 3072)
> pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
> example1.mp3')
> pygame.mixer.music.play(loops=1, start=0.0)
>
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\pygameProgs\musicexp.py", line 5, in
> <module>
>     pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/
> example1.mp3')
> error: Couldn't read from 'C:/Python25/myPrograms/pygameProgs/
> example1.mp3'

tried filenames with \ also but same result.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 11:59:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 17:59:02 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
Message-ID: <48359832$0$29163$426a74cc@news.free.fr>

Agustin Villena a ?crit :
> On May 22, 5:19 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Agustin Villena a ?crit :
>>
>>>> And not that useful - why would one care about the function being
>>>> defined in class X or Y when one have the exact file and line ?
>>> I have 3 reasons:
>>> 1) My developing time is expended running unit tests and browsing
>>> tracebacks to find which is the real problem. Knowing the offender
>>> class (instead of the method alone) makes me understand more quickly
>>> which component of my software is failing.
>> This is only true when there is an obvious, one-to-one, unambiguous
>> relationship between the physical location of the error (file, line) and
>> the class of the object the method has been called on. Which is not
>> necessarily the case (inheritance, method decoration and monkeypatching
>> comes to mind here...).
>>
>> Also, your above statement seems to imply that component==class, which
>> is not the case in Python.
>>
>>> 2) There are some ocassions where I only have the traceback (e.g. when
>>> analyzing an app's log) and no inmediate access to teh source code
>> Ok. But the above still apply...
>>
>>> 3) And finally, for completeness: If a function is really a method, if
>>> the traceback show only its name and not the class that defines it,
>>> for me its a bug, because the method name has no sense out of its
>>> class.
>> I'm not sure you really grasp what "methods" are in Python. What you
>> define (using the def statement) within a class is function, not a
>> method. It only becomes a method when it's looked up on an instance or
>> class object, and this 'method' is only a thin wrapper around the
>> instance, class and function objects. And FWIW, you don't need to define
>> the function within the class to make it a method:
>>
>> # bar.py
>> def bar(obj):
>>    print "function bar.bar called on obj %s" % obj
>>
>> # foo.py
>>
>> class Foo(object): pass
>>
>> # baaz.py
>> from foo import Foo
>> import bar
>>
>> Foo.baaz = bar.bar
>>
>> def guux(obj):
>>    print "function baaz.guux called on obj %s" % obj
>>
>> # main.py
>> from baaz import Foo
>> f = Foo()
>> f.bar()
>>
>> f.gnix = baae.guux.__get__(f, type(f))
>> f.gnix()
>>
>> Not to say that your concerns are pointless, and that things cannot be
>> improved somehow, but this is not that trivial, and there may be
>> ambuiguities in some not so rare cases.
> 
> Well, the solution given in an early response is good enough for me.

Not for me.

> I don't see things like you, because I'm accustomed to design my
> software
> though classes and see the code in an "object = software's functional
> atom/component" way

I guess you mean 'class = software's functional atom/component' - 
because it's perfectly legal, in Python, to have per-instance methods...

Now the fact that *you* see it that way doesn't mean Python (and most 
Python users) have to share your views, so labelling the way it works as 
"a bug" sounds a bit arrogant to me.

> I agree that python's dynamic nature make things complicated here, but
> for me it its just
> an implementation problem derived of the recent OOP support of python

I beg your pardon ? "recent OOP support in Python" ? Python had classes 
and objects years before Oak was renamed as Java and made public, you know.


From notnorwegian at yahoo.se  Mon May 26 14:34:10 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 11:34:10 -0700 (PDT)
Subject: definition of a highlevel language?
Message-ID: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>

(might not be the right forum for this but...)

what is the definition of a highlevel-language?

well there isnt one specifically and wikipedia and the like gives just
a very general description obv you can say it abstracts away lowlever
operations.


yes but how?

a function like map takes a function and applies it to a list for
example.
this abstracts away a common procedure like iterate through a list and
for every position do a computation.
so it is a higherorderfunction. is this how higher-level-languages are
built?


so are they fundamentally differently built or is it just a lot of
lowlevel operations built on top of each other?


haskell is considered a very highlevellanguage but can you do
systemsprogramming with it(yes maybe it is very unpractical i dont
know but can you)?


is lambda calculus a more abstract and efficient way of modeling a
computer? meaning you start at a higher level of abstraction and can
work up to even higher even faster?


how did lispmachines work? was the basic system programmed in LISP?


From duncan.booth at invalid.invalid  Tue May 27 04:35:45 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 May 2008 08:35:45 GMT
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
	<b5bf2f79-5f6e-44c0-9ecb-d91204ee7c64@e53g2000hsa.googlegroups.com>
Message-ID: <Xns9AAB618417C4Fduncanbooth@127.0.0.1>

Dan Bishop <danb_83 at yahoo.com> wrote:

> On May 26, 9:46?pm, notnorweg... at yahoo.se wrote:
>> >>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I',
>> 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>> >>> x
>>
>> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
>> 'clever', 'handsome']
>>
>>
>>
>> what do i need to do?
> 
> x.sort(key=str.upper)

Or another option to consider:

>>> import locale
>>> locale.setlocale(locale.LC_COLLATE, 'en')
'English_United States.1252'
>>> print ', '.join(sorted(['CHAPTER', 'eu', 'Emma', 'I', 'I', 'VOLUME', 
'Woodhouse', 'clever', 'handsome', '\xe9t\xe9'], key=locale.strxfrm))
CHAPTER, clever, Emma, ?t?, eu, handsome, I, I, VOLUME, Woodhouse

Annoyingly strxfrm in Python 2.5 can't cope with unicode so if you go this 
way you need to make sure that the strings are all encoded with the correct 
encoding (which in this example is the 1252 at the end of the string  
returned from setlocale) or define a new key function which applies the 
correct encoding.

-- 
Duncan Booth http://kupuguy.blogspot.com


From ahmed_kh1987 at yahoo.com  Wed May 21 12:21:05 2008
From: ahmed_kh1987 at yahoo.com (ahmed khattab)
Date: Wed, 21 May 2008 09:21:05 -0700 (PDT)
Subject: No subject
Message-ID: <338512.44068.qm@web39704.mail.mud.yahoo.com>

unsubscribe me form python list plz

       
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From deets at nospam.web.de  Wed May 28 10:06:58 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 16:06:58 +0200
Subject: Error handling in Python
References: <5d6a51a9-3d35-4c99-b7ef-fa79f950ece8@l17g2000pri.googlegroups.com>
Message-ID: <6a5791F32qcugU1@mid.uni-berlin.de>

subhabrata.iisc at hotmail.com wrote:

> Dear Members of the group,
> If I open a url by urlopen in the urllib, the file is either opening a
> file or if no url is there it would give error. The error is generated
> can be handled by IOError handling schemes.
> But if there are thousands or millions of URLs and I do not know who
> will open and who won't open. How can I handle this kind of situation?
> If any one can help solving this problem.

http://docs.python.org/tut/node10.html

Diez


From pistacchio at gmail.com  Wed May  7 07:12:49 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 13:12:49 +0200
Subject: PHP + TinyButStrong Python replacement
Message-ID: <fvs2rj$cru$1@aioe.org>

hi! i'm a php user and a python programmer. i'd love to use python for 
my server side needs but i can't seem to find what i'm looking for. for 
most of my php work i use mysql and tinyButStrong 
(http://www.tinybutstrong.com) which is a very lightweight template 
engine that offers powerful functionalities. you insert TBS tags in web 
pages like:

<div align="center" class="title-page"> [var.x] </div>

and it replaces [var.x] with the value of global variable x. it also 
makes blocks (and nested blocks) easy to implement:

<p class="text-example2"> [blk1;block=begin] [blk1.val]<br> 
[blk1;block=end] </p>

in the previous code it cycles throu all the values of the array blk1.

it does many more things, like htlm escaping, url and js encoding etc, 
conditional displaying etc, but it is not more confusing that inserting 
pieces of code into the HTML (aka: littering the code and kissing 
goodbye to the code/presentation separation). it comes in the form of a 
single file with a single class that you can easily include in the code 
and go.

now, i've searched the net and it seems full of python-based frameworks 
for doing server side scripting and templating, but none that suits my 
needs.

    1. i like writing code and i like control. i mean, open up the 
simplest text editor and write in it. i don't want something that is 
command-line driven or that writes code for me like ">>> 
makePagesFromThisDatabase()".
    2. i want something very lightweight. i don't want dozen of options, 
pre-made blogging parts ecc. i just need a good non invasive template 
engine and the basic functions for server side scripting, like session 
managing, request parsing, functions to manipulate html code (encodings etc)
    3. i don't want to beg my hosting provider to install the libraries. 
a simple include file should do the work.
    4. object oriented programming is not required (better: i prefer 
plain old procedural programming).

any help? thanks in advance


From netizen at gmx.de  Fri May 23 08:29:34 2008
From: netizen at gmx.de (Michael Fesser)
Date: Fri, 23 May 2008 14:29:34 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
Message-ID: <5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>

.oO(Duncan Booth)

>On those rare occasions when I've helped someone who wanted advice I've 
>found that my Python oriented viewpoint can be quite hard to translate to 
>PHP. For example I'd suggest 'oh you just encode that as utf8' only to be 
>told that there's no easy way to do that (have just Google'd it looks like 
>there is now a way to do that but with a big red warning about it being 
>EXPERIMENTAL and only use at your own risk).
>
>(Looking at the example given for unicode_encode it appears to depend for 
>its working on a global setting which isn't included in the example. I may 
>have misunderstood the example but if I read that correctly its a good 
>example of why PHP doesn't fit my brain.)

The only little problem is that PHP doesn't have native Unicode support
yet, which will change with PHP 6. But of course you can still use UTF-8
without any trouble, I do it all the time. You just have to keep in mind
that many string functions still work on bytes, not on characters, but
this can almost always be solved with the Multibyte extension. Apart
from that there's no problem with PHP and UTF-8. It's also easily
possible to convert between various encodings using the iconv extension.

Micha


From dfnsonfsduifb at gmx.de  Sat May 24 07:13:08 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:13:08 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<ef228571-ed7d-4f96-b0bf-380132dd57ed@2g2000hsn.googlegroups.com>
Message-ID: <4r9lg5xvm8.ln2@joeserver.homelan.net>

George Sakkis schrieb:

>> However, this "assignment and comparison" is not working. What's the
>> "Python way" of doing this kind of thing?
> 
> The most obvious and readable of course: use two statements, as one
> should do regardless of the language, instead of resorting to error-
> prone hacks.

As I said in the reply to Carl, this might be okay for if-clauses, but 
is bothering me with while-loops.

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From agustin.villena at gmail.com  Fri May 30 16:08:00 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Fri, 30 May 2008 13:08:00 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
	<48353a94$0$12639$426a74cc@news.free.fr>
	<15ce3e4e-c98c-4ee6-bb5f-caf2cf0d69cf@i76g2000hsf.googlegroups.com>
	<48359832$0$29163$426a74cc@news.free.fr>
Message-ID: <7f4c2ee4-a66f-46ca-9737-8fb3e44201cb@59g2000hsb.googlegroups.com>

To this therad, I received 2 kinds of anwsers:
- some that help me in
- and other where some guy thinks that has the right to rule if my
need has some value

Thanksfully, Python is an open platform, and with the help obtained
here, now I can fullfill my needs.
Who is the arrogant?

On 22 mayo, 11:59, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Agustin Villena a ?crit :
>
>
>
> > On May 22, 5:19 am, Bruno Desthuilliers <bruno.
> > 42.desthuilli... at websiteburo.invalid> wrote:
> >> Agustin Villena a ?crit :
>
> >>>> And not that useful - why would one care about the function being
> >>>> defined in class X or Y when one have the exact file and line ?
> >>> I have 3 reasons:
> >>> 1) My developing time is expended running unit tests and browsing
> >>> tracebacks to find which is the real problem. Knowing the offender
> >>> class (instead of the method alone) makes me understand more quickly
> >>> which component of my software is failing.
> >> This is only true when there is an obvious, one-to-one, unambiguous
> >> relationship between the physical location of the error (file, line) and
> >> the class of the object the method has been called on. Which is not
> >> necessarily the case (inheritance, method decoration and monkeypatching
> >> comes to mind here...).
>
> >> Also, your above statement seems to imply that component==class, which
> >> is not the case in Python.
>
> >>> 2) There are some ocassions where I only have the traceback (e.g. when
> >>> analyzing an app's log) and no inmediate access to teh source code
> >> Ok. But the above still apply...
>
> >>> 3) And finally, for completeness: If a function is really a method, if
> >>> the tracebackshowonly its name and not the class that defines it,
> >>> for me its a bug, because the method name has no sense out of its
> >>> class.
> >> I'm not sure you really grasp what "methods" are in Python. What you
> >> define (using the def statement) within a class is function, not a
> >> method. It only becomes a method when it's looked up on an instance or
> >> class object, and this 'method' is only a thin wrapper around the
> >> instance, class and function objects. And FWIW, you don't need to define
> >> the function within the class to make it a method:
>
> >> # bar.py
> >> def bar(obj):
> >>    print "function bar.bar called on obj %s" % obj
>
> >> # foo.py
>
> >> class Foo(object): pass
>
> >> # baaz.py
> >> from foo import Foo
> >> import bar
>
> >> Foo.baaz = bar.bar
>
> >> def guux(obj):
> >>    print "function baaz.guux called on obj %s" % obj
>
> >> # main.py
> >> from baaz import Foo
> >> f = Foo()
> >> f.bar()
>
> >> f.gnix = baae.guux.__get__(f, type(f))
> >> f.gnix()
>
> >> Not to say that your concerns are pointless, and that things cannot be
> >> improved somehow, but this is not that trivial, and there may be
> >> ambuiguities in some not so rare cases.
>
> > Well, the solution given in an early response is good enough for me.
>
> Not for me.
>
> > I don't see things like you, because I'm accustomed to design my
> > software
> > though classes and see the code in an "object = software's functional
> > atom/component" way
>
> I guess you mean 'class = software's functional atom/component' -
> because it's perfectly legal, in Python, to have per-instance methods...
>
> Now the fact that *you* see it that way doesn't mean Python (and most
> Python users) have to share your views, so labelling the way it works as
> "a bug" sounds a bit arrogant to me.
>
> > I agree that python's dynamic nature make things complicated here, but
> > for me it its just
> > an implementation problem derived of the recent OOP support of python
>
> I beg your pardon ? "recent OOP support in Python" ? Python had classes
> and objects years before Oak was renamed as Java and made public, you know.



From jonbutler88 at googlemail.com  Thu May 22 15:06:18 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Thu, 22 May 2008 12:06:18 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com>
Message-ID: <2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com>

On May 22, 9:59?am, alex23 <wuwe... at gmail.com> wrote:
> On May 22, 6:22 pm, jonbutle... at googlemail.com wrote:
>
> > Still getting very odd errors though, this being the latest:
>
> > Traceback (most recent call last):
> > ? File "spider.py", line 38, in <module>
> > [...snip...]
> > ? ? raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
> > httplib.InvalidURL: nonnumeric port: ''
>
> Okay. What I did was put some output in your Spider.parse method:
>
> ? ? def parse(self, page):
> ? ? ? ? try:
> ? ? ? ? ? ? print 'http://' + page
> ? ? ? ? ? ? self.feed(urlopen('http://' + page).read())
> ? ? ? ? except HTTPError:
> ? ? ? ? ? ? print 'Error getting page source'
>
> And here's the output:
>
> ? ? >python spider.py
> ? ? What site would you like to scan?http://www.google.com
> ? ?http://www.google.com
> ? ?http://http://images.google.com.au/imghp?hl=en&tab=wi
>
> The links you're finding on each page already have the protocol
> specified. I'd remove the 'http://' addition from parse, and just add
> it to 'site' in the main section.
>
> ? ? if __name__ == '__main__':
> ? ? ? ? s = Spider()
> ? ? ? ? site = raw_input("What site would you like to scan? http://")
> ? ? ? ? site = 'http://' + site
> ? ? ? ? s.crawl(site)
>
> > Also could you explain why I needed to add that
> > HTMLParser.__init__(self) line? Does it matter that I have overwritten
> > the __init__ function of spider?
>
> You haven't overwritten Spider.__init__. What you're doing every time
> you create a Spider object is first get HTMLParser to initialise it as
> it would any other HTMLParser object - which is what adds the .rawdata
> attribute to each HTMLParser instance - *and then* doing the Spider-
> specific initialisation you need.
>
> Here's an abbreviated copy of the actual HTMLParser class featuring
> only its __init__ and reset methods:
>
> ? ? class HTMLParser(markupbase.ParserBase):
> ? ? ? ? def __init__(self):
> ? ? ? ? ? ? """Initialize and reset this instance."""
> ? ? ? ? ? ? self.reset()
>
> ? ? ? ? def reset(self):
> ? ? ? ? ? ? """Reset this instance. ?Loses all unprocessed data."""
> ? ? ? ? ? ? self.rawdata = ''
> ? ? ? ? ? ? self.lasttag = '???'
> ? ? ? ? ? ? self.interesting = interesting_normal
> ? ? ? ? ? ? markupbase.ParserBase.reset(self)
>
> When you initialise an instance of HTMLParser, it calls its reset
> method, which sets rawdata to an empty string, or adds it to the
> instance if it doesn't already exist. So when you call
> HTMLParser.__init__(self) in Spider.__init__(), it executes the reset
> method on the Spider instance, which it inherits from HTMLParser...
>
> Are you familiar with object oriented design at all? If you're not,
> let me know and I'll track down some decent intro docs. Inheritance is
> a pretty fundamental concept but I don't think I'm doing it justice.

Nope, this is my first experience with object oriented programming,
only been learning python for a few weeks but it seemed simple enough
to inspire me to be a bit ambitious. If you could hook me up with some
good docs that would be great. I was about to but a book on python,
specifically OO based, but il look at these docs first. I understand
most of the concepts of inheritance, just not ever used them before.

Thanks


From ivan.illarionov at gmail.com  Mon May 26 18:38:22 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 22:38:22 +0000 (UTC)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
	<cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>
	<4d26372a-c07d-4a41-992f-4c158f0c40c3@56g2000hsm.googlegroups.com>
Message-ID: <g1fe4u$2cld$3@news.mtu.ru>

On Mon, 26 May 2008 15:26:50 -0700, Gandalf wrote:

> On May 27, 12:18 am, Gandalf <goldn... at gmail.com> wrote:
>> On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>>
>> > On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
>> > > Thanks!
>> > > Anyone know which library should i learn then?
>>
>> > Looks like you need to dive into Win32
>> > APIhttp://msdn.microsoft.com/en-us/library/ms697544
(VS.85).aspxhttp://ms...
>> > and others
>> > combined with ctypes.
>>
>> > Ivan
>>
>> well, that seems extremely valuable but how can i implement those
>> functions with python?
> 
> You know what I'm sorry, I will try to understand the ctypes lib before
> bothering you.
> 
> thank you all!

No need to sorry. I have actually found very valuable information at
http://www.brunningonline.net/simon/blog/archives/000652.html
while googling to answer your question. I didn't know that such things 
are really possible with Python/Win32! It'll help me a lot. Thank you!

Ivan


From george.sakkis at gmail.com  Mon May 12 21:16:01 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 12 May 2008 18:16:01 -0700 (PDT)
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
	<mailman.1008.1210635369.12834.python-list@python.org>
Message-ID: <e0ea51fe-7279-434b-9e21-c15554624003@2g2000hsn.googlegroups.com>

On May 12, 7:35?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Ohad Frand" <ohad.fr... at percello.com> wrote in message
>
> news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
> | I am looking for a way to programmically get a list of all python
> | existing statements that I cannot access by __builtins__ or locals()
> | (like ["assert","break","class",...])
>
> You appear to want the keywords that begin statements. ?Look at the keyword
> list in the language reference and pick those you want. ?Then build that
> list into your program.

Someone already did it:

import keyword
print keyword.kwlist

George


From benjamin.kaplan at case.edu  Thu May 29 13:56:22 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Thu, 29 May 2008 13:56:22 -0400
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <ec96e1390805291056r48e3dbfh32a93ca7cf8724a9@mail.gmail.com>

On Thu, May 29, 2008 at 12:07 PM, <allendowney at gmail.com> wrote:

> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen
>  <http://mail.python.org/mailman/listinfo/python-list>


Definitely go with the new-style classes. Python 3 is coming out soon, which
doesn't have classic classes.

http://docs.python.org/dev/3.0/whatsnew/3.0.html#new-class-and-metaclass-stuff
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From zapwireDASHgroups at yahoo.com  Thu May 22 17:03:42 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 14:03:42 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<39vgg5-a9t.ln1@pluto.solar-empire.de>
Message-ID: <QclZj.148945$Gv.42177@en-nntp-07.dc1.easynews.com>

Hi Marc,

"Marc Christiansen" <usenet at solar-empire.de> wrote in message 
news:39vgg5-a9t.ln1 at pluto.solar-empire.de...
> I'm not sure I would recommend it, but try:
> [v for x in range(4) for v in (x, 2 * x)]

That certainly works... and it almost seems like a bit less of a hack (if 
perhaps somewhat harder to read) than the "sum" approach to flattening?

> A similar solution as above should work.

This is what I came up with:

>>> list1=[1,2,3]
>>> list2=[4,5,6]
>>> [j for (i,m) in enumerate(list1) for j in (m,list2[i])]
[1, 4, 2, 5, 3, 6]

Not exactly "clean" due to having to enumerate list1 to get the index for 
list2.  There may be a better method, of course -- so far I like Petter 
Otten's approach.

Thanks for the help,
---Joel




From Scott.Daniels at Acm.Org  Sat May 17 15:32:17 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 17 May 2008 12:32:17 -0700
Subject: working with images (PIL ?)
In-Reply-To: <g0f0ib$3im$1@aioe.org>
References: <g0f0ib$3im$1@aioe.org>
Message-ID: <tOGdnerHudwlrbLVnZ2dnUVZ_jidnZ2d@pdx.net>

Poppy wrote:
> I need to write a program to examine images (JPG) and determine how much 
> area is whitespace. We need to throw a returned image out if too much of it 
> is whitespace from the dataset we're working with. I've been examining the 
> Python Image Library and can not determine if it offers the needed 
> functionality. Does anyone have suggestions of other image libraries I 
> should be looking at it, or if PIL can do what I need? 
> 
> 
If PIL's "histogram" method doesn't give you a clue how you might do
this, hire someone to do it.

--Scott David Daniels
Scott.Daniels at Acm.Org


From musiccomposition at gmail.com  Thu May 29 22:47:52 2008
From: musiccomposition at gmail.com (Benjamin)
Date: Thu, 29 May 2008 19:47:52 -0700 (PDT)
Subject: undocumented functions in pkgutil
References: <04d9dbd9-ad9c-4756-afa5-163800a785eb@t54g2000hsg.googlegroups.com>
Message-ID: <2b192ae3-14d3-4392-8d91-f9e0a9e81458@e53g2000hsa.googlegroups.com>

On May 29, 12:34 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> I see that the pkgutil module has many useful functions which are
> however undocumented.
> Does anybody know why it is so? In particolar, can I safely use
> pkg.walk_packages
> without risking a change of interface in the future? I looks unlikely,
> since pkgutil is
> used in setuptools, but I want to be sure before relying on it.

We don't change the API of undocumented functions. However, if you
find these functions useful and would like to work on documenting
these, please email docs at python.org.
>
>     Michele Simionato



From cmpython at gmail.com  Sun May  4 20:30:35 2008
From: cmpython at gmail.com (CM)
Date: Sun, 4 May 2008 17:30:35 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
Message-ID: <30a3bab4-16a7-4f0d-8534-9b5e8df199cd@x35g2000hsb.googlegroups.com>

On May 4, 7:45 pm, notbob <not... at nothome.com> wrote:
> I'm trying to learn how to program.  I'm using:
>
> How to Think Like a Computer Scientist
>
> Learning with Python
> 2nd Edition
>
> Am I likely to receive any help, here, or is there another irc, forum, etc,
> that might better serve a complete amateur such as myself.  Thnx.
>
> nb

Another good place to be aware of is the Python Tutor List, some great
people helping out there.  You can search the archive and/or subscribe
to
the list here:
http://www.nabble.com/Python---tutor-f2981.html

I've found learning from scratch is aided if you know what sorts of
things
you hope to do with programming and then work from within that, using
issues
germane to that area as building blocks.


From castironpi at gmail.com  Fri May 16 08:50:29 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 05:50:29 -0700 (PDT)
Subject: morning in Python
Message-ID: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>

I want to talk to the newsgroup.  As I have found that its readers
will be non-trivially attentive, I esteem it a worthwhile production,
for finely divided values of worth & while.  (Disclaimer: Don't call
me millionaire; life & money...).  It is not clear that I will be
posting code first thing, for a range of values of I.  (Yes I have
tackled decentralization and contribution in identity before.)

It's possible that I just like to write, in which case, fol. the
foregoing, I might just like to write messages, plainly ignorant of
who replies.  My name still works as castironpi, since I just don't
have e-mail.  For the plot, though, I do not know who's reading by
name.  If that makes me a villian, that's ok, mysteries are good.

I've evaluated *my* character, ladies & gentlemen, before.  I just
know the trick, which may originate in the older stories of night and
day.

First things first, I try to represent story lines, which involves
some non-trivial automation of computer-modeled intelligence.  It
involves live people too.  You might be reading.  I'm not.

>From what plans I come with, it takes a second to infer that I'm on
the newsgroup, which generates some purified roles.  This has some
consequences for my character upon entrance.  It also complicates the
matter of getting to Python, connecting me with a larger fraction of
the community.  I am on a computer and have made games.  I've tried
Pygame.

I have a proposition to ask you all: Python emphasizes state.  Is it
true?



From matthieu.brucher at gmail.com  Sat May 17 15:26:08 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Sat, 17 May 2008 21:26:08 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <QZFXj.6721$255.5738@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
	<mailman.1270.1211029209.12834.python-list@python.org>
	<QZFXj.6721$255.5738@bignews8.bellsouth.net>
Message-ID: <e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>

Hi,

I did not manage to build extension with distutils with Python compiled with
VS different than 2003. The need for 2003 was hard-coded in distutils.
You can try building extensions with VS2008 with Scons. This is what I do a
lot, and everything works fine as long as the interface does not use
standard structures (like FILE, custom structures are fine) or objects
allocated in the extension is freed in the extension.

Matthieu

2008/5/17 inhahe <inhahe at gmail.com>:

>
> "Christian Heimes" <lists at cheimes.de> wrote in message
> news:mailman.1270.1211029209.12834.python-list at python.org...
> > inhahe schrieb:
> >> what is going on here, and how do I compile these external libraries?
> >
> > I assume you are trying to compile Python 2.5 with VS 9.0. It's not
> > supported. Some extensions don't compile under VS 9.0
> >
> > Christian
> >
>
> I just installed Visual Studio 8 and tried compling and I bgot the same
> problem.  hope this isn't a redundant post. i don't know if
> pyhon-list at python.org reposts here.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From gherron at islandtraining.com  Sat May 17 12:11:22 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 09:11:22 -0700
Subject: [PyOpenGL-Users] glGenLists returns 0
In-Reply-To: <482E82DE.5060000@al.com.au>
References: <482E82DE.5060000@al.com.au>
Message-ID: <482F03AA.60902@islandtraining.com>

Astan Chee wrote:
> Hi,
> Im trying to do glGenLists while a program is running and it keeps 
> returning 0 and whenever I try to do a glCallList, it fails with a 
> 'invalid value' error.
> Is this a known issue? why would my program give valid glGenList while 
> being initialized but not while it is running?
>   

IIRC,  this can happen if you call glGenLists *before* you create any 
windows (or perhaps more accurately, before an OpenGL context has been 
created).

> Im using wx to create a new pygame thread that uses pyopengl. This is 
> the glGenList snippet:
>
>             dlBody = glGenLists(1)           
>             glNewList(dlBody,GL_COMPILE)
>             SphereT = gluNewQuadric()
>             gluSphere(SphereT, 0.5, 32, 32)
>             gluQuadricNormals(SphereT, GLU_SMOOTH)
>             gluQuadricDrawStyle(SphereT, GLU_FILL)   
>             glEndList()
>
> and here is how I init:
>
>         glShadeModel(GL_SMOOTH)
>         glClearColor(0.0, 0.0, 0.0, 0.0)
>         glClearDepth(1.0)
>         glEnable(GL_DEPTH_TEST)
>         glDepthFunc(GL_LEQUAL)
>         glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
>
>         glEnable (GL_LIGHT0)
>         glEnable (GL_LIGHTING)
>         glEnable(GL_TEXTURE_2D)
>    
>         LightAmbient  = ( (0., 0., 0., 0.,1.) )
>         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, LightAmbient )
>    
>         glEnable(GL_COLOR_MATERIAL)
>
>         glViewport(0, 0, width, height)
>         glMatrixMode(GL_PROJECTION)
>         glLoadIdentity()
>         gluPerspective(45, 1.0*width/height, 1.0, 10000.0)
>         glMatrixMode(GL_MODELVIEW)
>         glLoadIdentity()
>
>   



From maxm at mxm.dk  Tue May 13 15:10:08 2008
From: maxm at mxm.dk (Max M)
Date: Tue, 13 May 2008 21:10:08 +0200
Subject: Literate programs in Python
In-Reply-To: <e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
References: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>
	<e3e8630d-e4fa-4e4c-b4e1-0230e35c53aa@27g2000hsf.googlegroups.com>
Message-ID: <g0cp2h$mki$1@ger.gmane.org>

Mike Driscoll skrev:
> On May 13, 10:28 am, Paul Miller <neokos... at gmail.com> wrote:
>> Does anyone know of any (preferably largish) examples of literate
>> programs written using Python?  Alternatively, does anyone know of any
>> literate programming tools which support Python well?  (I am aware of
>> Leo and I've been to literateprogramming.com, but any additional
>> pointers would be much appreciated!)


I think that most people in Python use doctest. Personally I find this 
form of literal programming to be very efficient.

Like the example here:

http://codespeak.net/icalendar/example.html


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science



From kyosohma at gmail.com  Thu May 29 15:17:08 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 29 May 2008 12:17:08 -0700 (PDT)
Subject: Remote Debugging for python.
References: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>
Message-ID: <c2f1afcf-3467-40cd-b843-6ab354cd643a@2g2000hsn.googlegroups.com>

On May 29, 2:09?pm, nkarkhan <nkark... at gmail.com> wrote:
> Newbie to python here..so bear with me.
>
> I used to be able to gdb to a target machine running c/c++ code and
> see where my program was hanging, crashing, executing..
>
> How do I do that with python?
> I have multi-threaded python programs running on a remote machine. I
> want to se where they are at any instance.
>
> If remote debugging is too much to ask for.. what about local
> debugging?
> Can i break into an executing program and see at source-level where my
> pyhton program/process/thread is at?
>
> Thank you,
> Nitin.

I've never done this, but I some Google-fu and found this stuff:

http://hapdebugger.sourceforge.net/
http://wiki.python.org/moin/PythonDebuggers

I suppose you could add some logging code to your program as well and
check that from time to time.

Mike


From rajb at rice.edu  Mon May 12 12:47:45 2008
From: rajb at rice.edu (Raj Bandyopadhyay)
Date: Mon, 12 May 2008 12:47:45 -0400
Subject: Inconsistency in retrieving exceptions via sys module
Message-ID: <482874B1.4010504@rice.edu>

Hi

I am writing some C code which sets and retrieves a Python exception. I 
set the exception using PyErr_SetString(), and retrieve it in 2 ways: 1) 
using PyErr_Occurred() and 2) Using sys.exc_type. However, I get two 
different results and am very puzzled by this apparent inconsistency. 
Could anyone please clarify what I'm missing? I need both to work 
consistently for my application.

Here is the C code and the output

#include "Python.h"

#define OPRINT(o) PyObject_Print((o),stdout,0);printf("\n")

int main() {
    PyObject *sysmod,*etype1,*etype2;

    Py_Initialize();
    sysmod = PyImport_ImportModule("sys");
   
    PyErr_SetString(PyExc_Exception,"HI");      //set exception

    etype1 = PyObject_GetAttrString(sysmod,"exc_type");  //sys.exc_type
    etype2 = PyErr_Occurred();

    printf("sys.exc_type : "); OPRINT(etype1);
    printf("PyErr_Occurred() : "); OPRINT(etype2);
}


The output

sys.exc_type : None
PyErr_Occurred() : <type 'exceptions.Exception'>


Thank you
Raj
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From kenobi at gmail.com  Wed May 28 15:32:36 2008
From: kenobi at gmail.com (Rick Kwan)
Date: Wed, 28 May 2008 12:32:36 -0700 (PDT)
Subject: looking for membership management software -- Open Source, 
	written in Python
References: <mailman.1613.1211812586.12834.python-list@python.org> 
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com> 
	<mailman.1647.1211894018.12834.python-list@python.org>
Message-ID: <5b0ffbf9-627e-484b-bd4c-895568a1a1a5@s21g2000prm.googlegroups.com>

On May 27, 6:13 am, Laura Creighton <l... at openend.se> wrote:
> In a message of Mon, 26 May 2008 12:38:28 PDT, miller.pau... at gmail.com writes:
>
> >I forgot to ask: what's your target platform?  I mentioned Organizer's
> >Database, but it only runs on Windows.  If you need a Linux or OS X
> >solution, then I can make another suggestion. :-)
>
> Ah, FreeBSD would be the best -- as in making our sysadmins very, very
> happy but linux would also be very acceptable, and probably OS X as well.
> But PHP is probably not.
>
> Thanks again,
> Laura

I've been up against similar issues.  I handle records for a 1,300-
member chapter of a 30,000-member organization.  So my original data
comes from the national organization as an Excel spreadsheet --
actually an pseudo-XML copy of the spreadsheet.

The first step I do is convert it into a file of tab-separated values
(TSVs, not CSVs) through use of the HTMLParser module.  From there,
I've built a series of Python scripts to generate e-mail lists,
mailing labels (with the help of C program), identify senior members
and fellows, etc.

None of it is web-accessible yet.  For me, I'd want to give certain
officers or committee chairs the ability to grab subsets of data on
their own, or allow them to send mail to their specific subset of the
membership.


From afrobeard at gmail.com  Wed May 28 07:48:10 2008
From: afrobeard at gmail.com (afrobeard)
Date: Wed, 28 May 2008 04:48:10 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
Message-ID: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>

The following following code fails with the failiure:-


File "test.py", line 27, in __main__.sanitize_number
Failed example:
    sanitize_number('0321-4683113')
Expected:
    '03214683113'
Got:
    '03214683113'


Expected and Got looks the same. The value should verify.  What am I
doing wrong here ?

Thanks in advance. I really appreciate your time.

P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
Windows XP


/////////////////// Code /////////////////////////////////

import os;
import string;

def sanitize_number(input_number):
    """
    Sanitize Number Module Please make Test Cases in Here

    >>> sanitize_number('0321-4683113')
    '03214683113'
    >>> sanitize_number('03214683113')
    '03214683113'
    >>> sanitize_number('0321-468-3113')
    '03214683113'
    >>> sanitize_number('0321 4683113')
    '03214683113'
    >>> sanitize_number('0321 468 3113')
    '03214683113'
    >>> sanitize_number('3214683113')
    '03214683113'
    >>> sanitize_number('923214683113')
    '03214683113'
    >>> sanitize_number('00923214683113')
    '03214683113'
    >>> sanitize_number('+923214683113')
    '03214683113'
    >>> sanitize_number('+923214+683113')
    False


    """

    countries = {
        '92' : 'Pakistan'
        }

    """
        Reference http://en.wikipedia.org/wiki/List_of_mobile_codes_in_Pakistan
        Please update original wiki article if more codes are
discovered
    """
    providers = {
        '300' : 'Mobilink',
        '301' : 'Mobilink',
        '302' : 'Mobilink',
        '306' : 'Mobilink',
        '307' : 'Mobilink',
        '308' : 'Mobilink',
        '309' : 'Mobilink',
        '342' : 'Telenor',
        '343' : 'Telenor',
        '344' : 'Telenor',
        '345' : 'Telenor',
        '346' : 'Telenor',
        '321' : 'Warid',
        '322' : 'Warid',
        '323' : 'Warid',
        '331' : 'Ufone',
        '332' : 'Ufone',
        '333' : 'Ufone',
        '334' : 'Ufone',
        '313' : 'Zong',
        '314' : 'Zong',
        '320' : 'Instaphone',
        '335' : 'SCOM'
        }

    #Rule 1 Numbers can only contain spaces, + and

    input_number = string.join(input_number.split(), '') # Split
Spaces and join
    input_number = string.join(input_number.split('-'),'') # Split
Spaces and join

    #print "After Split Join", input_number

    if input_number.startswith('00'):
        input_number = input_number[2:]
    elif input_number.startswith('0'):
        input_number = input_number[1:]
    elif input_number.startswith('+'):
        input_number = input_number[1:]

    #print "Phase1", input_number

    #The number should now have either 10 or 12 digits depending on
whether or not country code is included

    if len(input_number) == 10 or len(input_number) == 12:
        if len(input_number) == 12:

            for code in countries.keys():
                if input_number.startswith(code):
                    input_number = input_number[2:]
                    break;
                else:
                    return False # Country Code not Supported

        for code in providers.keys():
                if input_number.startswith(code):
                    #input_number = input_number[3:]
                    input_number = '0'+input_number
                    #print "Result", input_number
                    return input_number

    return False

#print sanitize_number('+923214+683113') == False


def _test():
    import doctest
    doctest.testmod()

if __name__ == "__main__":
    _test()


From greg at cosc.canterbury.ac.nz  Sat May 17 06:14:07 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 17 May 2008 22:14:07 +1200
Subject: ANN: Pyrex 0.9.8.1
Message-ID: <mailman.1273.1211036597.12834.python-announce-list@python.org>

Pyrex 0.9.8.1 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Base classes no longer need to be specified in a forward
declaration of an extension type, or in the implementation
part of an extension type defined in a .pxd file.

Also, I've come up with an even better way of handling
circular cimports involving structs, unions and extension
types. You can now say things like

   from spam import struct Foo, union Blarg, class Ham

This simultaneously imports the name and forward-declares
it in the other module.


What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From castironpi at gmail.com  Sat May  3 19:39:43 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sat, 3 May 2008 16:39:43 -0700 (PDT)
Subject: generator functions in another language
Message-ID: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>

I'm actually curious if there's a way to write a generator function
(not a generator expression) in C, or what the simplest way to do it
is... besides link the Python run-time.


From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 10:58:00 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 16:58:00 +0200
Subject: Relationship between GUI and logic?
In-Reply-To: <4836c28e$0$25161$c3e8da3@news.astraweb.com>
References: <48363c34$0$15204$607ed4bc@cv.net>
	<4836747b$0$15488$426a74cc@news.free.fr>
	<4836c28e$0$25161$c3e8da3@news.astraweb.com>
Message-ID: <4836db5e$0$12593$426a74cc@news.free.fr>

John Salerno a ?crit :
> "Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
> message news:4836747b$0$15488$426a74cc at news.free.fr...
>> Ever heard of the "Model/View/Controller" pattern ?
> 
> Yes, I have, but I probably don't understand it well enough yet. For 
> example, I don't  really know what is meant by phrases like "build a model",

An abstract, logical representation of your board and players, which 
have a state (ie : board has X cells, player1 is on cell (x, y) and 
player2 on cell (x', y')) and behaviour (ie : player2.move_to(x, y)) 
that changes the state.

> "the view registers itself with the model",

This is the Observer pattern. The view is passed the model when 
instanciated, and calls model.register(self). When the model changes 
it's state, it calls back the '.notify()' method of each of the 
registered views (a same model can have multiple views at the same time).

> "interactions are sent to the 
> appropriate controller"

In a typical GUI, the controllers are the event handlers (or are called 
from the event handlers - depending on how the GUI works). The system 
dispatch the events to the appropriate event handlers.

> -- I may understand them literally, but I get the 
> feeling that the implementation of these ideas are beyond me. I think it's 
> mainly an issue of terminology, so probably I should just read up on MVC.

Probably, yes !-)



From frikker at gmail.com  Mon May 19 20:42:28 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 17:42:28 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org> 
	<8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com> 
	<7xtzgtyjtx.fsf@ruckus.brouhaha.com>
	<mailman.1369.1211242829.12834.python-list@python.org>
Message-ID: <347817de-bf76-44c2-81f2-c2966f62cad2@x41g2000hsb.googlegroups.com>

On May 19, 8:16 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 19 May 2008 20:07:06 -0300, Paul Rubin
> <"http://phr.cx"@NOSPAM.invalid> escribi?:
>
> > blaine <frik... at gmail.com> writes:
> >> How is it that you recommend killing a pure python thread?
>
> Make the thread cooperate. It should periodically check some variable or
> condition, and cleanly exit when requested.
>
> >> And also,
> >> when i use the 'threading' module am I creating a process, or a (gasp)
> >> thread?
>
> > A thread.
>
> >> (Is this an obvious question - and if so, how does one create
> >> a 'process'?)
>
> > os.fork()
>
> A more portable answer: using the subprocess module.
>
> --
> Gabriel Genellina

Thanks for the info.  The problem that I'm having is that I get a
thread stuck blocking - waiting for a return from a FIFO (made with
os.mkfifo()).

Blaine


From usenet at technicalbloke.com  Mon May 19 12:36:21 2008
From: usenet at technicalbloke.com (Roger Heathcote)
Date: Mon, 19 May 2008 17:36:21 +0100
Subject: Thread killing - I know I know!
In-Reply-To: <6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
Message-ID: <D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>

sjdevnull at yahoo.com wrote:
> On May 16, 11:40 am, Roger Heathcote <use... at technicalbloke.com>
> wrote:<snip>
>> Despite many peoples insistence that allowing for the arbitrary killing
>> of threads is a cardinal sin and although I have no particular threading
>> problem to crack right now I remain interest in the taboo that is thread
>> killing. The real world and it's data are messy and imperfect and I can
<snip>
> In general, use processes when you can and threads only when you
> must.  OS designers spent a lot of energy implementing protected
> memory, no sense throwing out a fair chunk of that hard work unless
> you actually need to.

Fair point, but for sub processes that need to be in close contact with 
the original app, or very small functions that you'd like 100s or 1000s 
of it seems like a kludge having to spawn whole new processes build in 
socket communications and kill via explicit OS calls. I can't see that 
approach scaling particularly well but I guess there's no choice.

Does anyone think it likely that the threading module (and threading in 
general) will be improved and augmented with features like timeouts and 
arbitrary threadicide in the next year or two?  Seems there's little 
scope for tapping the power of the current generation of multiple cores 
with the current pythons, tho I appreciate breakneck speed has never 
been a design objective it looks like multicore is set to be the next 
generation PC architecture.

Roger Heathcote - technicalbloke.com


From aguirre.adolfo at gmail.com  Wed May  7 20:55:35 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 17:55:35 -0700 (PDT)
Subject: DISLIN 9.3 stuck
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
	<48214644$0$11610$3b214f66@aconews.univie.ac.at>
Message-ID: <cda9b76c-d9e3-4f55-990d-586a5b8b6708@s50g2000hsb.googlegroups.com>

On May 7, 2:03 am, Weinhandl Herbert <weinh... at unileoben.ac.at> wrote:
> adolfo wrote:
> > I built the following little program:
>
> > from numpy import *
> > fromdislinimport *
>
> > def main():
> >     x = arange (100, typecode=Float32)
> >     plot (x, sin (x/5))
> >     disfin ()
>
> > main()
>
> > *** Here are the problems:
>
> > 1. The "from Numeric import" statement did not work, I replaced with
> > "from numpy import*" and no complains form the interpreter.
>
> > 2. If I enyter "fromdislinimport *" I get:
> >  Traceback (most recent call last):
> >   File "<pyshell#0>", line 1, in <module>
> >     fromdislinimport *
> > ImportError: No module nameddislin
>
> > I checked the environmental variables paths and it all seems Ok:
> > c:\dislin
> > SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
> > \Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
> > PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python
>
> the environment variable is PYTHONPATH and i has to contain the directory
> where thedislin.pyd module can be found;

** Thank you for the comments:
1- The strange thing is that I went to the dislin directory in the C:
drive and there was no disli.pyd file anywhere. I found the file in
the My Documents subdirectory where I had originally unzipped the
dislin archived files I downloaded and from where I run the setup.

> you should set environment variableDISLINtoo
> (see python.inf, which you can find in thedislin-distribution)

2 - Well I have followed the DISLIN 9.3 inf file for Python 2.5.2 for
Windows. It contains commands for a unix command line "unzip -o
dl_93_py.zip setup first and then... " and then:

" Windows 98/ME

        Add the following commands to the autoexec.bat file

        PATH=c:\dislin\win;%PATH%
        SET DISLIN=c:\dislin
        SET PYTHONPATH=c:\dislin\python

     Windows NT/2000/XP/Vista

        The environment variables can be set or modified with the
        Control Panel
        (see -> Control Panel -> System -> Advanced -> Environment
        Variables)."

 *** I have followed all these directions but DISLIN still does not
shop up as a module when making the Python calls.

It keeps me entertained in spite that my productivity is cero ;-)

Adolfo

>
> depending on your python version (2.4 or 2.5) you need the correctdislin-distribution, becausedislinis a fortran/c library with
> a layer for python access.
>
> and try some examples of the distribution (they are importing onlydislin
> and math modules).
>
> hth
>
> Herbert



From saikia at unspokenmind.net  Thu May  8 16:42:17 2008
From: saikia at unspokenmind.net (Amitabh Saikia)
Date: Thu, 8 May 2008 13:42:17 -0700
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
	<237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>
	<ee9cd3be0805080912s2079fbe3u8c347f0e8bd8c75b@mail.gmail.com>
Message-ID: <237596740805081342v66d97312ibf887bbbd30e2b3a@mail.gmail.com>

Cron is best for this, and you should be able to create a crontab for
yourself. If your system admin has not enabled user level crons. Then
write a shell-script or python

Shell version
-----------------
count=0
max_number_of_times
while [ $count < $max_number_of_times ];
do
  your_command &
  sleep <time_interval>
  count=`expr $count + 1`
done

I said about nohup, in case you want to logout and still want this to work.
You can also use `screen' (only in the case where you are planning to logout
and you want your program should run).

- saikia

--


On Thu, May 8, 2008 at 9:12 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:

> Can you please explain it a little more? I do not have that much
> experience! I really appreciate it if you can share a sample code if you
> have one.
>
> Thanks
>
> On Thu, May 8, 2008 at 11:07 AM, Amitabh Saikia <saikia at unspokenmind.net>
> wrote:
>
>> write a bash script(to run your program at intervals) and run the bash
>> script with nohup
>>
>> - saikia at unspokenmind.net
>>
>> On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com>
>> wrote:
>>
>>> I was wondering if you know how can I run a python code once every five
>>> minutes for a period of time either using python or some other program like
>>> a bash script.
>>>
>>> I have asked this question before and some of you answered me but I still
>>> have problem. Most of the answers was to use cron and crontab which works on
>>> my computer but not if I want to do it on department's computer since I do
>>> not have permission to change those files. Is there any other way which does
>>> not need administrator permission?
>>>
>>> Thanks  a lot,
>>>
>>> Maryam
>>>
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>
>>
>
>
> --
> Maryam Saeedi
> PhD student
> Economics Department
> University of Minnesota
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From dieter at handshake.de  Tue May 13 14:21:53 2008
From: dieter at handshake.de (Dieter Maurer)
Date: 13 May 2008 20:21:53 +0200
Subject: The Importance of Terminology's Quality
In-Reply-To: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <x7iqxikqta.fsf@handshake.de>

"xahlee at gmail.com" <xahlee at gmail.com> writes on Wed, 7 May 2008 16:13:36 -0700 (PDT):
> ...
> Let me give a few example.
> 
> ? ?lambda?, widely used as a keyword in functional languages, is named
> just ?Function? in Mathematica. The ?lambda? happend to be called so
> in the field of symbolic logic, is due to use of the greek letter
> lambda ??? by happenstance. The word does not convey what it means.
> While, the name ?Function?, stands for the mathematical concept of
> ?function? as is.

"lambda" is not a function, but an operator with two operands, a variable
name and an expression resulting in another expression
which behaves like a function (the abstraction
of the variable name in the expression).


Dieter


From skanemupp at yahoo.se  Fri May  2 12:37:07 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 2 May 2008 09:37:07 -0700 (PDT)
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
Message-ID: <bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>

On 2 Maj, 18:13, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> globalrev schrieb:
>
> > if pygame.key.get_pressed[K_a]:
> >             print "Muppet"
>
> > K_a is not defined.
>
> > but yes it is. why do i get this error?
>
> No it isn't - otherwise you wouldn't get this error, wouldn't you?
>
> What IS defined is
>
> pygame.K_a
>
> Or if you do
>
> from pygame import K_a
>
> then K_a is defined as well.
>
> Diez

ok thanks
if (key.get_pressed[K_t] and key.get_pressed[K_f]):
     print "Yup!"

said int he tut it confused me.


anyway i changed it and the list or dict from keygetpressed is all
zeros but the K_a always is true whether i push it or not.






From jake at vapourforge.com  Thu May 22 04:14:30 2008
From: jake at vapourforge.com (Jake Anderson)
Date: Thu, 22 May 2008 18:14:30 +1000
Subject: Returning to 'try' block after catching an exception
In-Reply-To: <485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <48352B66.9050601@vapourforge.com>

alex23 wrote:
> On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>   
>> In case it's not clear what I meant: after executing some_function()
>> exception SomeExcpetion gets risen. Then, in except block I do something
>> to fix whatever is causing the exception and then I would like to go back
>> to try block, and execute some_function() again. Is that doable?
>>     
>
> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
There are cases where this could be helpful
FTP upload that would sometimes get cut off along the way. So you might 
want to just try again depending on why the failure happened perhaps.

Command of "ReTry" sounds good to me ;->
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From sprinkles.chris at gmail.com  Fri May  9 16:13:43 2008
From: sprinkles.chris at gmail.com (Chris Sprinkles)
Date: Fri, 9 May 2008 16:13:43 -0400
Subject: how to call a text file
Message-ID: <a5bfba430805091313r62b018bfh86dff3540595fbc7@mail.gmail.com>

I need to know how to call a text file called txt_file.do I just put the
directory that it is in like C:\documnet\blah\blah ???

cars_file = open()

# i will be our line counter so we know when to pause
i = 0

print

for line in cars_file:

   i = i + 1      # increment i by 1 at each line

   print line

   if i == 5:    # change 5 to whatever you think is adequate

        i = 0      # zero the counter
        print
        raw_input("Hit Enter to continue: ") # wait for the user
        print

print
cars_file.close()
-Chris-
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From richard.speaker at sbcglobal.net  Thu May  8 10:07:40 2008
From: richard.speaker at sbcglobal.net (Richard Speaker)
Date: Thu, 8 May 2008 07:07:40 -0700 (PDT)
Subject: Troubles with 'self'
Message-ID: <467304.16209.qm@web81401.mail.mud.yahoo.com>

I'm somewhat new to Python... and programming in general.  I know enough to be dangerous for sure. I have a feeling the solution to this is simple.  I'm having trouble getting 'self' to initialize or work in a class application. I keep getting the message:
   
      LogFile = self.BasicSummary ( )
NameError: name 'self' is not defined
   
  Code looks like this:
   
  from data_decode import *
  class DataAnalysis:
        
        def PainInTheArse ( self , i , InvI ):
                """This is a filter I made to overcome
                some problems I was having with sine wave
                analysis"""
                TemporaryData = [ ]
                for a in range ( int ( InvI [ i ] ) , len ( InvI ) ):
                        if a < 0:
                                a = 0
                        b = a + 1
                        try:
                                TemporaryData.append ( InvI [ a + i ] )
                                if ( InvI [ b + i ] < 0 and InvI [ b + i + 1 ] > 0 ):
                                        TemporaryData.append ( InvI [ a + i + 1 ] )
                                        break
                        except IndexError:
                                continue
                return TemporaryData
          def GetTheInvIData ( self , InvI ):
                  """"Function determines zero-crossing, and then
                calculates the +/- peaks to get an average """
                CurrentMaxList = [ ]
                CurrentMinList = [ ]
                for i in range ( 0 , len ( InvI ) ):
                        try:
                                if ( InvI [ i ] <= 0 and InvI [ i + 1 ] > 0 ):
                                        TemporaryData = self. PainInTheArse ( i , InvI )
                                        BetterData = self.FilterTheBS ( TemporaryData )
                                        CurrentMaxList.append ( max ( BetterData ) )
                                        CurrentMinList.append ( min ( BetterData ) )
                        except IndexError:                        
                                continue
                  MeanCurrentMax = sum ( CurrentMaxList ) / len ( CurrentMaxList )
                MeanCurrentMin = sum ( CurrentMinList ) / len ( CurrentMinList )
                InvIPeakToPeak = MeanCurrentMax - MeanCurrentMin
                EstPeak = InvIPeakToPeak / 2
                return EstPeak
   
          def FilterTheBS ( self , TemporaryData ):
                """This is another filter I made to overcome
                some problems I was having with sine wave
                analysis"""
                BetterData = [ ]
                UselessData = [ ]
                for i in range ( 0 , len ( TemporaryData ) ):
                        try:
                                if TemporaryData [ i ] == TemporaryData [ i + 1 ]:
                                        UselessData.append ( TemporaryData [ i ] )
                                else:
                                        BetterData.append ( TemporaryData [ i ] )
                        except IndexError:
                                BetterData.append ( TemporaryData [ i ] )
                                continue
                return BetterData
          def BasicSummary ( self ):
                
                DDC = DecodeData( )
                  try:
                          MeanCurrent_A = float ( ( self.GetTheInvIData ( DDC.InvIa ) ) )
                        MeanCurrent_B = float ( ( self.GetTheInvIData ( DDC.InvIb ) ) )
                        MeanCurrent_C = float ( ( self.GetTheInvIData ( DDC.InvIc ) ) )
  except ValueError:
   print'KaFlewie!'
                LogFile = []
                LogFile.append ('DEVICE CURRENT SUMMARY:\n')
                LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % ( MeanCurrent_A ) )
                LogFile.append ( '\tPHASE A: AVG Current = +/- %.2f A' % ( MeanCurrent_B ) )
        
                  return LogFile
        
        LogFile = self.BasicSummary ( )
          for a in LogFile:
  print a
          
        
any and all advice is welcome
   
  Rick
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From arnodel at googlemail.com  Sat May 24 07:44:43 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 24 May 2008 12:44:43 +0100
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<nsbd349tlkc5o7h280f71h7aoov1vnavon@4ax.com>
Message-ID: <m28wy06i50.fsf@googlemail.com>

Michael Fesser <netizen at gmx.de> writes:
> you don't like PHP, that's perfectly OK. But you should accept that
> it's only a tool and just as good as the one who uses it. For me and
> many others it's a quite good language, we're able to write clean and
> efficient code with it in a rather short time.

I'm sure that anyone who is competent enough can write clean code in
any language (in the case of PHP, I am only familiar with one
significant example: I use and have written a few simple extensions
for mediawiki, and I find it quite easy to understand and navigate the
code).

However, while I feel that most languages are quite neutral about
this, I find that Python *encourages* me to write better code.  In
other words, Python is not only a tool, it's also a lovely language.

Languages are a bit like shoes.  You probably wouldn't want to wear the pair
I'm most comfortable in!

-- 
Arnaud


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 04:03:36 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 10:03:36 +0200
Subject: Newbie question - probably FAQ (but not exactly answered by
	regular FAQ)
In-Reply-To: <slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
References: <mailman.496.1209807334.12834.python-list@python.org>
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
Message-ID: <482010d3$0$12566$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> Banibrata Dutta <banibrata.dutta at gmail.com> wrote:
>>  I've gone through the list of "language differences" between 2.3 / 2.4
>>  & 2.5 of CPython. I've spend around 2 weeks now, learning v2.5 of
>>  CPython, and I consider myself still very very newbie. So, unable to
>>  take a call as to how-important or desirable the newer language
>>  features are -- so whether to write my app for v2.5 of Python, versus,
>>  as few others on this list have recommended, i.e. to stick to v2.3 ??
>>  Are the preformance improvements, and memory footprint / leak fix in
>>  2.5 enough to justify moving to it ? What all do I stand to lose (or
>>  gain) by writing on v2.3 ??
> 
> If you are writing for 2.3 you are writing for 2.4 and 2.5 also.
> 
> There are some nice things in 2.4 and 2.5 but nothing you really need
> IMHO.  

There are some nice things in Python but nothing you really need neither 
- could have the same result in C or assembly !-)

<OP>
Ok, if you're newbie to programming, the new stuff in 2.4 and 2.5 might 
not be that useful to you right now. But the real question is mostly: do 
you have any reason to stick to 2.3 ?
</OP>

>>  I've a constraint due to which I might have to also write parts of my
>>  app (client side) in Jython (because I want to eventually ship Java --
>>  yet benefit from the rapid development and clarity of Python). Would
>>  sticking to v2.3 in such a case be a better idea ? Suggestions with
>>  reasoning would be very helpful.
> 
> Jython seems to be based off python 2.2

It is so far. But Sun recently hired Jython's maintainers, so we may 
have a much more up to date Jython version in a foreseeable future.



From Scott.Daniels at Acm.Org  Sat May  3 22:36:45 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 03 May 2008 19:36:45 -0700
Subject: Python documentation
In-Reply-To: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
References: <02e9821d-10db-4164-bdf7-4285ee659fbb@w74g2000hsh.googlegroups.com>
Message-ID: <svCdnfHc393SgoDVnZ2dnUVZ_sOrnZ2d@pdx.net>

admin at remembernobody.com wrote:
> I have been learning python for some time using the dive into python
> book. I am interested to know if anyone can recommend a book which
> covers more advanced topics like threading and potentially GUI style
> coding....
If you don't at least browse "The Python Cookbook," you are missing
a chance at something you'll find great.  Note, I am strongly of the
opinion that what makes a book great is anachronistic, so check it out
before you buy.

I love information-dense books like Knuth, Strunk & White, and the
original C manual.  I know people who hate these.  I think of them as
technical poetry, rather than prose.  My guess is that Alex Martelli
(editor for the most recent cookbook) is not discoursive enough for
some; I appreciate that fact and understand others are in the "we read
Knuth so you don't have to" camp.  personally, I've loved most hours
I've spent on Knuth -- I'd hate to deprve anyone of that experience.

-Scott David Daniels
Scott.Daniels at Acm.Org


From badmuthahubbard at gmail.com  Tue May  6 08:38:36 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Tue, 6 May 2008 15:38:36 +0300
Subject: Another MIDI question - soundfonts
Message-ID: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>

Hello.

I'm writing a microtonal sequencer, and I don't want to use MIDI per
se, but I'd like to be able to load standard sample banks to play.
The only standard format I'm familiar with is soundfont, and it seems
to be the most popular; if anyone knows of others, especially for Mac,
which I believe most of my software's users will be using, I'd love to
know about it.
And, does anyone know a python module that will allow me to load in
soundfont files and make use of their info?  I'd like to be able to
remap the pitches, of course, but using the same presets and such.

Thanks.
-Chuckk

-- 
http://www.badmuthahubbard.com


From stef.mientki at gmail.com  Mon May 19 15:07:05 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Mon, 19 May 2008 21:07:05 +0200
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <4831CFD9.4080608@gmail.com>

John Salerno wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   
If I look at the answers and
if I skip the web designs, which in my opinion are almost pure GUI ;-) ,
it would be interesting to know,
which of the mentioned applications of non-GUI programs
are used by others than the programmer him/herself.

cheers,
Stef


From banibrata.dutta at gmail.com  Thu May  8 04:37:30 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Thu, 8 May 2008 14:07:30 +0530
Subject: Python module for SNMP bindings ?
Message-ID: <3de8e1f70805080137p2fb97bc6x8d1399090edce7d2@mail.gmail.com>

Hi,

While looking around for Python API's to do SNMP, found the following link
with a high level comparison --
http://urchin.earth.li/~twic/SNMP_in_Python.html

i.e. options seems to be: PySNMP (complete SNMP impl.), SNMPy, yapSNMP
(Net-SNMP bindings).

Of those, yapSNMP seems to be most promising. Any comments ?

-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From arne at vajhoej.dk  Sat May 31 20:43:22 2008
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Sat, 31 May 2008 20:43:22 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <g1ru8v0v3l@news4.newsguy.com>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
	<op.ub0cq1fy8jd0ej@petes-computer.local>
	<g1ru8v0v3l@news4.newsguy.com>
Message-ID: <4841f0aa$0$90274$14726298@news.sunsite.dk>

szr wrote:
> Peter Duniho wrote:
>> On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:
>>> Arne Vajh?j wrote:
>>>> Stephan Bour wrote:
>>>>> Lew wrote:
>>>>> } John Thingstad wrote:
>>>>> } > Perl is solidly based in the UNIX world on awk, sed, } > bash 
>>>>> and C. I don't like the style, but many do.
>>>>> }
>>>>> } Please exclude the Java newsgroups from this discussion.
>>>>>
>>>>> Did it ever occur to you that you don't speak for entire news
>>>>> groups?
>>>> Did it occur to you that there are nothing about Java in the above ?
>>> Looking at the original post, it doesn't appear to be about any
>>> specific language.
>> Indeed.  That suggests it's probably off-topic in most, if not all,
>> of the newsgroups to which it was posted, inasmuch as they exist for
>> topics specific to a given programming language.
> 
> Perhaps - comp.programming might of been a better place, but not all 
> people who follow groups for specific languages follow a general group 
> like that - but let me ask you something. What is it you really have 
> against discussing topics with people of neighboring groups? Keep in 
> mind you don't have to read anything you do not want to read. [1]

I very much doubt that the original thread is relevant for the Java
group.

But the subthread Lew commente don was about Perl and Unix. That is
clearly off topic.

Personally I am rather tolerant for topics. But I can not blame Lew
for requesting that a Perl-Unix discussion does not get cross posted
to a Java group.

>> Regardless, unless you are actually reading this thread from the
>> c.l.j.p newsgroup, I'm not sure I see the point in questioning
>> someone who _is_ about whether the thread belongs there or not.
> 
> I would rather have the OP comment about that, as he started the thread. 
> But what gets me is why you are against that specific group being 
> included but not others? What is so special about the Java group and why 
> are you so sure people there don't want to read this thread? [1] What 
> right do you or I or anyone have to make decisions for everyone in a 
> news group? Isn't this why most news readers allow one to block a 
> thread?

I doubt Lew read any of the other groups, so it seems quite
natural that he did not comment on the on/off topic characteristics
in those.

>> And if it's a vote you want, mark me down as the third person reading
>> c.l.j.p that doesn't feel this thread belongs.  I don't know whether
>> Lew speaks for the entire newsgroup, but based on comments so far,
>> it's pretty clear that there unanimous agreement among those who have
>> expressed an opinion.
> 
> Ok, so, perhaps 3 people out of what might be several hundred, if not 
> thousand (there is no way to really know, but there are certainly a lot 
> of people who read that group, and as with any group, there are far more 
> readers than there are people posting, so, again, just because you or 
> two other people or so don't want to read a topic or dislike it, you 
> feel you can decide for EVERYONE they mustn't read it? Again, this is 
> why readers allow you to ignore threads. Please don't force your views 
> on others; let them decide for themselves. [1]

And I am sure that Lew did not intended to pretend to speak for
the entire group. He spoke for himself.

I believe there has been several posts that agreed with him and none
that disagreed, so it seems very plausible that the group indeed agree
with him.

Arguing that a huge silent majority has a different opinion
than those speaking up is a very questionable argument. Everybody
could try and count them for their view. The only reasonable
thing is not to count them.

Arne


From iman.darabi at gmail.com  Tue May 13 02:10:39 2008
From: iman.darabi at gmail.com (Iman)
Date: Mon, 12 May 2008 23:10:39 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
	<4d3eba3d-80bc-4cb4-a2ef-abf1827f9cfd@24g2000hsh.googlegroups.com>
Message-ID: <34195d16-8941-4d3b-bf6e-5cf3b7c4bba4@k10g2000prm.googlegroups.com>

On May 12, 4:50?pm, Gerry <gerard.bl... at gmail.com> wrote:
> Many city travel surveys collect source destination trip-start data;
> you might be able to find one of these studies.
>
> I think each car in your simulation should have a destination. ?Then
> the simulation needs a route-finder, and cars can progress along their
> routes as traffic permits -- or even change routes if traffic seems
> too slow.

yes, we should have destinations for cars. but my goal is my
agents(cars) can recognize non-movable objects ( for example ) so
change it's path or stop when light is red.
i can add lots of if-then-else in my code to action in these
situations but thought maybe there are some patterns or books which is
talking about these topics...

>
> I think if you start with a very small city -- perhaps just a 5 by 5
> grid, and generate sources and destinations at intersections randomly
> along the perimeter, you'll have enough to prototype all of the
> building blocks.

>
> Gerry
>
> On May 12, 6:37 am, Iman <iman.dar... at gmail.com> wrote:
>
> > hi
> > i'm working on some simulation project . i'm going to simulate traffic
> > of a city.
> > this simulation has cars , passengers , non-movable objects and
> > Traffic signals ?.
> > i've made cars as intelligentagent. it has thinking method ,
> > changing states agents ...
> > the main problem is i have problem to move my agents in world .
> > it would be possible to add some method toagentwhich move ?agentin
> > random ?destination .
> > but i'm trying to find some patterns which is designed ?for this
> > problems .
> > is there any sample source code in python or links, docs to help me ?
> > ?thanks for your attention .



From deets at nospam.web.de  Tue May 20 10:38:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:38:08 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
	<69g3bmF31ttuuU3@mid.uni-berlin.de>
	<g0ub8q$f8n$1@news.lysator.liu.se>
Message-ID: <69g63gF2v4102U3@mid.uni-berlin.de>

Thomas Bellman wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> bearophileHUGS at lycos.com wrote:
> 
>>> The Example 2 builds a list, that is then thrown away. It's just a
>>> waste of memory (and time).
> 
>> No, it doesn't. It uses append because it refers to itself in the
>> if-expression. So the append(c) is needed - and thus the assignment
>> possible but essentially useless.
> 
> Yes it does.  A list comprehension *always* creates a list.  In
> this case it will be a list of None, since that is what list.append()
> returns.  See this:

Yep - no idea how that slipped me. I still don't mind the occasional waste
of a list-creation over a more concise looping-construct, but I totally
admit that one has to be aware of this. more than I was....

Diez


From upton at virginia.edu  Tue May 13 13:35:32 2008
From: upton at virginia.edu (Dan Upton)
Date: Tue, 13 May 2008 13:35:32 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <87d4nqgllh.fsf@physik.rwth-aachen.de>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<02a10e4b-5017-463c-96d2-e1779f2b9ebd@j22g2000hsf.googlegroups.com>
	<8bd40bb6-5f8d-4256-a41a-fe341d10d476@q1g2000prf.googlegroups.com>
	<87d4nqgllh.fsf@physik.rwth-aachen.de>
Message-ID: <5504f9ac0805131035t3080fd2fobdf9cee72f647c50@mail.gmail.com>

On Tue, May 13, 2008 at 1:28 PM, Torsten Bronger
<bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
>
>  Dave Parker writes:
>
>  >>  Notice that I said "free software", not "*** FREE *** software
>  >> !!!!  1!" (that is, free as in freedom, not free as in
>  >> beer). Read again my answer, considering this.
>  >
>  > I misread your meaning.
>
>  ... twice.  Flaming Thunder itself is not free software, is it?
>
>

For Dave, from FSF:

Free software is a matter of the users' freedom to run, copy,
distribute, study, change and improve the software. More precisely, it
refers to four kinds of freedom, for the users of the software:

    * The freedom to run the program, for any purpose (freedom 0).
    * The freedom to study how the program works, and adapt it to your
needs (freedom 1). Access to the source code is a precondition for
this.
    * The freedom to redistribute copies so you can help your neighbor
(freedom 2).
    * The freedom to improve the program, and release your
improvements to the public, so that the whole community benefits
(freedom 3). Access to the source code is a precondition for this.

Now that we're all on the same page, maybe third time's the charm for
a response about FT not being free...


From space.captain.face at gmail.com  Fri May 30 07:31:15 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Fri, 30 May 2008 04:31:15 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1742.1212075712.12834.python-list@python.org>
	<ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>
	<mailman.1760.1212123838.12834.python-list@python.org>
Message-ID: <702c030b-1575-4534-b536-bd1de9db7372@b5g2000pri.googlegroups.com>

On May 30, 3:03 pm, Kam-Hung Soh <kamhung.... at gmail.com> wrote:
> Kalibr wrote:
> > On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
> >> You can use the shell COM objects to access media properties
> >> as shown by Explorer.
>
> >> import win32com.client
> >> sh=win32com.client.Dispatch('Shell.Application')
>
> >> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> >> ns=sh.NameSpace(folder)
>
> >> ## the column index for Artist may vary from folder to folder
> >> for c in range(0,255):
> >>     colname=ns.GetDetailsOf(None, c)
> >>     if colname=='Artists':  ## This shows up as just Artist on XP
> >>         for i in ns.Items():
> >>             artist=ns.GetDetailsOf(i, c)
> >>             if artist:
> >>                 print ns.GetDetailsOf(i, 0), artist
> >>         break
>
> >>             Roger
>
> > I shall give that a go. (is the module you reference this one?
> >http://python.net/crew/mhammond/win32/Downloads.html)
>
> If you installed ActiveState's Python, the win32com module should be
> installed.
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

I gave your program a go, and it works magnificently.
Now I have to figure out how tro use it on a song by song basis
(I still suck at using classes).
Thanks so much for your help.


From inhahe at gmail.com  Thu May 22 20:01:01 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:01:01 -0400
Subject: Overloading __getitem__
References: <uf6hg5-ca9.ln1@buckbeak.hogwarts>
	<gXmZj.61595$3v1.19703@bignews3.bellsouth.net>
	<vochg5-bo9.ln1@buckbeak.hogwarts>
Message-ID: <TNnZj.13936$hv2.7731@bignews5.bellsouth.net>


> Apparently, args already is a tuple, so this should be:
>
>  def __getitem__(self, args):
>
> Is this documented somewhere? I couldn't find it anywhere.
>

Don't know, I just assumed it would take multiple arguments because I knew I 
had seen the form d[1,2] before, which incidentally is equivalent to 
d[(1,2)] so  I guess it makes sense that args is a tuple.





From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 03:35:18 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 09:35:18 +0200
Subject: Hungarian Notation
In-Reply-To: <4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
Message-ID: <483d0b31$0$30932$426a74cc@news.free.fr>

Dan Bishop a ?crit :
> On May 27, 12:28 am, "inhahe" <inh... at gmail.com> wrote:
>> Does anybody know of a list for canonical prefixes to use for hungarian
>> notation in Python?  Not that I plan to name all my variables with hungarian
>> notation, but just for when it's appropriate.
> 
> pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
> vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.

Mouarf ! Keyboard ! (and +1 QOTW BTW)


From grante at visi.com  Thu May 15 13:37:42 2008
From: grante at visi.com (Grant Edwards)
Date: Thu, 15 May 2008 12:37:42 -0500
Subject: pyserial and file open conflict?
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
Message-ID: <S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>

On 2008-05-15, p.wallstedt at gmail.com <p.wallstedt at gmail.com> wrote:

> I have a small but rather annoying problem with pyserial. I want to
> open a file on disk for reading and then open a com-port, write lines
> from the file to the port and then read something back and compare it
> to the next line in the file. Should be simple. And it is, apart from
> the fact that the file seems to be doubled ...? Or it loops through
> the file twice.
>
> If I exclude the "import serial" it works.
>
> Any ideas?

Your problem is in line 117 of your program.

-- 
Grant Edwards                   grante             Yow! Hmmm ... an arrogant
                                  at               bouquet with a subtle
                               visi.com            suggestion of POLYVINYL
                                                   CHLORIDE ...


From bockman at virgilio.it  Sun May 11 03:19:22 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Sun, 11 May 2008 09:19:22 +0200
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>
	<ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com>
Message-ID: <pan.2008.05.11.07.19.22.159479@virgilio.it>

On Sat, 10 May 2008 18:09:02 -0700, frankdmartinez wrote:

> Hi, Terry.
>     Yeah, no.  If we think of the inherited B as an object nested
> within a1, I'm attempting to initialize that B with b1 by accessing
> the B, say, via a function call.  I don't see how using a python
> factory achieves this.

But there is not such a thing, in Python. What you have is that A
has the same attributes/methods of B plus its own. 
What you could do is  adding in class A a method like this:

  class A(B):
     ...
     def set_b_attributes(self, instance_of_b):
         for k, value in instance_of_b.__dict__:
		setattr(self, k, value )

and the use it like this:

   a1.set_b_attributes(b1)

Of course, if b attributes are few and always the same it is more
readable assigning them explicitely:

     def set_b_attributes(self, instance_of_b):
         self.attr1 = instance_of_b.attr1
	 self.attr2 = instance_of_b.attr2
         ....

Ciao
-----
FB



       


From marco at sferacarta.com  Tue May 13 08:13:35 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 14:13:35 +0200
Subject: Some comparison operators gone in Python 3.0?
In-Reply-To: <0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
	<mailman.1035.1210673918.12834.python-list@python.org>
	<0bff2507-7242-48a6-8f95-d65191b0177f@x19g2000prg.googlegroups.com>
Message-ID: <RBfWj.41895$o06.41560@tornado.fastwebnet.it>

alex23 wrote:

> Given that all nine of his postings have inflammatory topics, he's
> beginning to sound like a troll.

Thank you, I couldn't decide if he was silly or nasty.
Now I know he's both.




From collinyeung at shaw.ca  Mon May 12 00:52:19 2008
From: collinyeung at shaw.ca (Collin)
Date: Mon, 12 May 2008 04:52:19 GMT
Subject: Accepting text input
Message-ID: <72QVj.262833$pM4.115744@pd7urf1no>

I'm pretty new to Python, but this has really bugged me. I can't find a 
way around it.


The problem is that, when I use raw_input("sajfasjdf") whatever, or 
input("dsjfadsjfa"), you can only have numerical values as answers.

Any help would be appreciated. Thanks.


From gagsl-py2 at yahoo.com.ar  Sat May 24 20:30:29 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 21:30:29 -0300
Subject: problem with import / namespace
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
	<483474E8.8090708@shopzeus.com>
	<b0d9688e0805240457r77716c56y94e9b71bf8de5ed9@mail.gmail.com>
Message-ID: <op.uboo03gkx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 08:57:37 -0300, ohad frand <ohad911 at gmail.com> escribi?:

> Thanks for your reply but it stil didnt work:
> i opened python shell, changed active directory to \\one and imported tmp1.
> now the correct file is loaded.
> now i deleted tmp1
> i dir os.chdir(\\two) and imported tmp1 again. now the incorrect file is
> loaded (the same one as before).
> i did one more trial with sys.path insted of os.chdir() and it didnt work
> either (sys.path.append(\\one), import tmp1, del tmp1, sys.path.remove(\\one),
> sys.path.append(\\two), import tmp1)
> can you please try to do so and see for yourself that something is wrong
> here.

If you want Python to forget about module tmp1: del sys.modules['tmp1']
But most of the issues with reload apply too http://docs.python.org/lib/built-in-funcs.html#l2h-61

> The reason why i am not using other names is because i am triyng to build
> something that will execute external sw and for that i have no control of
> the names of the modules, but this is not important, because python must
> give us a way to clear previously imported module

See http://docs.python.org/ref/import.html to see how the import statement works, and PEP 328 http://docs.python.org/whatsnew/pep-328.html to see how using relative imports can help in this case, but not without some help from the external modules themselves.
Anyway I don't understand your usage of execfile. Maybe you're after some form of plugin system? (search past messages with those keywords)

-- 
Gabriel Genellina



From aisaac at american.edu  Fri May  9 09:51:21 2008
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 09 May 2008 13:51:21 GMT
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <JqEUj.52492$Bb3.45491@trnddc01>
References: <JqEUj.52492$Bb3.45491@trnddc01>
Message-ID: <tFYUj.138$5Y1.88@trnddc04>

A question related to the observer pattern...

Suppose I have a variant: there are stocks, mutual funds, and investors.  Let us say that funds are observers for multiple stocks, and investors are observers for funds.  Once a "month" all stocks notify their observing funds of their end-of-month price, and *then* all fund to notify their observing investors of their end-of-month investment value. 

What is a good way to enforce this timing?  (I.e., a fund should not notify an its investors until all stocks have reported.)

Here is one way:

- for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
- as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
- When it is ok, the fund notifies investors and resets all the ``reportreceived`` values. 

Is this sensible enough? What are standard and better ways?

Thank you, 
Alan Isaac 

PS I am drawing on the description of the observer pattern at
<URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>
The real world aspects are just to add some concreteness.


From lists at cheimes.de  Fri May 16 07:50:38 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 16 May 2008 13:50:38 +0200
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
Message-ID: <482D750E.3030409@cheimes.de>

globalrev schrieb:
> cust1 = customer.__init__('12',['1','435','2332'])

cust1 = customer('12',['1','435','2332'])

Christian



From badmuthahubbard at gmail.com  Sun May  4 16:36:00 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Sun, 4 May 2008 23:36:00 +0300
Subject: Real Time Midi File Playback - Reading and Writing midi at the
	same time
In-Reply-To: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
References: <4e5b78a7-bc7a-4c1e-8552-b8175a9cbe32@m3g2000hsc.googlegroups.com>
Message-ID: <8200bab70805041336xf96f45ci2bed62ccb96ad61e@mail.gmail.com>

Threading was recommended to me as a way to time things:
http://docs.python.org/lib/timer-objects.html
Dunno if that helps you.
-Chuckk

On Sun, May 4, 2008 at 8:11 PM, Gilly <gilly.dekel at gmail.com> wrote:
> Hi
>  I am trying to create an application that uses some form of input to
>  create a midi file.
>  I would like for this to be a 'real time' process. In other words, I
>  want to be able to begin playing the midi file before I finish writing
>  it, and continue writing as it plays.
>
>  I would really appreciate any help possible on this matter.
>
>  Thanks!!
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From malaclypse2 at gmail.com  Sat May  3 22:25:32 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Sat, 3 May 2008 22:25:32 -0400
Subject: dict invert - learning question
In-Reply-To: <fvihum$em7$1@news.xmission.com>
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <16651e80805031925m7d393256y17711bb8b8c42765@mail.gmail.com>

On Sat, May 3, 2008 at 4:29 PM, dave <squareswallower at y1a2hoo3.com> wrote:
>  here is a piece of code I wrote to check the frequency of values and switch
> them around to keys in a new dictionary.  Just to measure how many times a
> certain key occurs:
>
>  def invert(d):
>         inv = {}
>         for key in d:
>                 val = d[key]
>                 if val not in inv:
>                         inv.setdefault(val, [key])
>                 else:
>                         inv[val].append(key)
>         return inv
>
>
>  Using the methods above (I'm just a beginner) could I have written it more
> concisely?  Any criticism/critique in the code would be greatly appreciated.

If you're using python 2.5, the collections module has the defaultdict
type that is useful for things like this.

from collections import defaultdict

def invert2(d):
    inv = defaultdict(list)
    for key, value in d.items():
        inv[value] += key
    return dict(inv)

If you don't mind returning a defaultdict instead of a regular
dictionary, you could just 'return inv'.  The defaultdict is useful
for building up the frequency counts in the first place too:

def wordcount(wordlist):
    wc = defaultdict(int)
    for word in wordlist:
        wc[word] += 1
    return dict(wc)


-- 
Jerry


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:42:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:42:35 -0300
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>
	<7e4721aa-4dac-466c-b884-6314ead136b6@q1g2000prf.googlegroups.com>
Message-ID: <op.uavgs9mdx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:30:32 -0300, skunkwerk <skunkwerk at gmail.com>  
escribi?:

> On May 8, 4:54 pm, castiro... at gmail.com wrote:
>> On May 8, 5:45 pm, skunkwerk <skunkw... at gmail.com> wrote:
>>
>>
>>
>> > i'm getting the wrong output for the 'title' attributes for this
>> > data.  the queue holds a data structure (item name, position, and list
>> > to store results in).  each thread takes in an item name and queries a
>> > database for various attributes.  from the debug statements the item
>> > names are being retrieved correctly, but the attributes returned are
>> > those of other items in the queue - not its own item.  however, the
>> > model variable is not a global variable... so i'm not sure what's
>> > wrong.
>>
>> > i've declared a bunch of workerthreads(100) and a queue into which
>> > new requests are inserted, like so:
>>
>> > class SimpleDBThread ( threading.Thread ):
>> >    def __init__ ( self, queue ):
>> >                 self.__queue = queue
>> >                 threading.Thread.__init__ ( self )
>> >    def run ( self ):
>> >                 while 1:
>> >                         item = self.__queue.get()
>> >                         if item!=None:
>> >                                 model = domain.get_item(item[0])
>> >                                 logger.debug('sdbthread  
>> item:'+item[0])
>> >                                 title = model['title']
>> >                                 scraped = model['scraped']
>> >                                 logger.debug("sdbthread title:"+title)
>>
>> > any suggestions?
>>
>> If man arises as a tool-carrier, we will carry tools, not people.
>> Don't use Python to make people; make money, and not too much.  Pick a
>> wage and you might get somewhere.
>
> excuse me?

(Please forgive our local pet)

is "item" a list? Perhaps the *same* list as other requests? Be careful  
when you put mutable objects in a queue.
And what about domain.get_item? is it a thread safe operation?
You said the model is not a global - but is it a *different* object for  
each request?

-- 
Gabriel Genellina



From google at mrabarnett.plus.com  Wed May 21 13:26:28 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 10:26:28 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<YJWYj.78109$%15.3302@bignews7.bellsouth.net>
	<06ea8b72-598e-4455-b3f9-e614ddb6ad94@p25g2000hsf.googlegroups.com>
	<FJXYj.78134$%15.20121@bignews7.bellsouth.net>
	<KoYYj.52545$3v1.22082@bignews3.bellsouth.net>
Message-ID: <370cb52b-4c40-42be-941c-fc8c50305e85@26g2000hsk.googlegroups.com>

On May 21, 5:50 pm, "inhahe" <inh... at gmail.com> wrote:
> >> One thing I hate from C is the assignment in expressions...Forcing
> >> myself to write
> >> 0 == Something
> >> rather than
> >> Something == 0
>
> > interesting trick, i've never thought of that/seen it
> > although if Python implemented it I think it should default to giving
> > warnings when you use = in an expression, that way you don't have to
> > worry.
>
> That introduces complications though, do you want to see a pagefull of
> warnings every time you import a module that uses the ='s?
> You could specify in your python file that you want to suppress that
> warning, but then you'd never know when you used = by accident when you
> meant to use ==.
> anyway i was thinking you could have a second assignment operator to use
> just in expressions, and only allow that.  it could be := since some
> languages tend to use that. i wouldn't like it as a general assignment
> operator but assignment in expressions is a special case.   also <- or ->.
> C uses -> for functions but I think math/calculators use that for
> assignment.

My preference would be ?=.

if match ?= my_re1.match(line):
  # use match
elif match ?= my_re2.match(line):
  # use match
elif match ?= my_re3.match(line):
  # use match


From wizzardx at gmail.com  Sun May  4 08:49:24 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 14:49:24 +0200
Subject: Light slices + COW
In-Reply-To: <53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
	<53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
Message-ID: <18c1e6480805040549u35361934s938c054725dba905@mail.gmail.com>

>  > D compiles to efficient machine code so Python is at a disadvantage
>  > even if you use the same syntax (see my first example). You can make
>  > the Python version faster, but beware of premature optimization.
>
>  This time I don't agree with this "premature optimization" thing. My
>  original Python version is just 5 lines long, it's readable enough,
>  and it's a part of a large library of mine of similar functions, they
>  must be fast because I use them all the time as building blocks in
>  programs.
>

Have you looked into the 'numpy' libraries? Those have highly
optimized array/numeric processing functions. Also the have a concept
of getting 'views' when you slice, rather than a full copy.

I also suggest benchmarking your apps which use your libs and see
where the bottlenecks are. Then you can move those to external
compiled modules (c/pyrex/cython/shedskin/etc). You can keep your
slower Python version around as a reference implementation.

>  > What I'dlike to see is a rope[1] module for Python.
>
>  People have already suggested it, and there's even an implementation
>  to replace Python strings. It was refused because... I don't know why,
>  maybe its implementation was too much more complex than the current
>  one, and it wasn't faster in all situations (and I think Guido wants
>  data structures that try to replace the basic built-in ones to be
>  faster in all situations and user-transparent too).

I'd be happy if there was a separate 'rope' class that you could wrap
arbitrary long sequences in when you need to (the same way that STL
has it separate to the string class, even though the string class has
a lot of other optimizations (internal ref counts, etc, to avoid
unnecessary copies)). Do you know one?

David.


From arnodel at googlemail.com  Sun May 11 13:36:25 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 18:36:25 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
Message-ID: <m2ej884uau.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>
> where fileName is defined before the line it's used in.  It works fine 
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get 
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>

It's telling you that you haven't got a file called 'fileName'.
Posting the code that triggers this error would allow people to
diagnose the error accurately rather than guessing.

-- 
Arnaud


From rlazo.paz at gmail.com  Sun May 25 14:02:47 2008
From: rlazo.paz at gmail.com (Rodrigo Lazo)
Date: Sun, 25 May 2008 13:02:47 -0500
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4839A607.7070300@behnel.de>
Message-ID: <8663t2feig.fsf@thinkpad.colorado>

Stefan Behnel <stefan_ml at behnel.de> writes:

> notnorwegian at yahoo.se wrote:
>> im writing a webcrawler.
>> after visiting a new site i want to store it in alphabetical order.
>> 
>> so obv i want fast insert. i want to delete duplicates too.
>> 
>> which datastructure is best for this?
>
> Keep the data redundantly in two data structures. Use collections.deque() to
> append and remove as in a queue, and set() to find duplicates.
>

what about heapq for sorting? 

-- 

Rodrigo Lazo (rlazo)



From tjreedy at udel.edu  Sun May 25 20:46:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 May 2008 20:46:48 -0400
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
Message-ID: <g1d19m$amg$1@ger.gmane.org>


"I V" <ivlenin at gmail.com> wrote in message 
news:eci_j.4164$mh5.917 at nlpi067.nbdc.sbc.com...
| On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:
| > I try to get a set of lambda functions that allows me executing each

I think it worth the reminder that Python has lambda *expressions* that 
result in function objects that identical to the function objects produced 
by def statements (except for the special name '<lambda>').   For the 
purpose of this thread,comparing functions by comparing their code objects, 
the name attribute is irrelevant.  So this discussion has nothing to do 
with the syntactic form of function definitions.

| > function code exactly once. Therefore, I would like to modify the set
| > function to compare the func_code properties (or the lambda functions 
to
| > use this property for comparison).
|
| With Ivan's approach, you lose access to the actual lambdas,

I presume you mean function object rather than lambda expression

| so you need
| to create a new function and then modify its code object to actually call
| the code; this seems a little clunky to me. You might instead want to
| wrap the lambdas in an object that will do the comparison you want:
|
| class Code(object):
| def __init__(self, func):
| self._func = func
|
| def __cmp__(self, other):
| return cmp(self._func.func_code, other._func.func_code)
|
| def __call__(self, *args, **kwargs):
| return self._func(*args, **kwargs)

If one could subclass from function instead of object, this would be even 
simpler (even with Bearophile's addition) since no __call__ would be 
needed.  But we cannot, partly because there did not seem to be much use 
case when this was once discussed.   But here is one ;-)

tjr





From nagle at animats.com  Sat May  3 12:38:48 2008
From: nagle at animats.com (John Nagle)
Date: Sat, 03 May 2008 09:38:48 -0700
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <mailman.465.1209746433.12834.python-list@python.org>
References: <mailman.465.1209746433.12834.python-list@python.org>
Message-ID: <481c9223$0$34540$742ec2ed@news.sonic.net>

python at bdurham.com wrote:
> Bad file names, i.e. filenames the OS considers illegal, will cause
> functions in the os.path module to raise an error.
> 
> Example:
> 
> import os.path
> print os.path.getsize( 'c:/pytest/*.py' )

    The issue, I think, is there's no function that checks
syntax of a path name without checking with the underlying OS
to see if the file exists.

    If, say, you're writing a GUI tool for setting up some configuration,
you'd want to do input validation on fields without actually
accessing the files.

				John Nagle


From rewonka at gmail.com  Thu May 29 12:37:54 2008
From: rewonka at gmail.com (rewonka at gmail.com)
Date: Thu, 29 May 2008 09:37:54 -0700 (PDT)
Subject: bit parsing from file
References: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>
	<a8f14114-f3e9-4848-8737-6736a46da122@r66g2000hsg.googlegroups.com>
Message-ID: <72784b91-df8d-424f-9531-d6c7cd9b073b@a70g2000hsh.googlegroups.com>

On m?j. 29, 18:26, Mensanator <mensana... at aol.com> wrote:
> On May 29, 9:42?am, "rewo... at gmail.com" <rewo... at gmail.com> wrote:
>
>
>
>
>
> > Hello,
>
> > I'm tring to make a cutting script.
> > The problem is the following, i have a sample pattern, for
> > example :'11101110' (0xEE)
> > That is the sign of the data begining.
> > How can i cut a file if the byte stepping is not the same, for
> > example:
>
> > file=open('test.bin','rb')
> > data=file.read()
> > print binascii.hexlify(data) ? ? ? ? ? ?# BB9A (1011101110011010)
> > file.close()
>
> > so i need to cut the first two bit and start to writeout the bit
> > stream to another file
> > If somebody have an idea to do this, please share with me.
> > Thanx
>
> Cutting off the leading two bits isn't a problem,
> but once you write out the byte 11101110 ?you are
> left with 011010 which cannot be written as it's not
> a byte. How do you plan to handle that? Add two bits
> at the MSB (00011010) or two bits at the LSB (01101000)
> or discard the fractional byte?
>
> And do you always know what the bit offset is or
> do you have to search for the 11101110 starting
> pattern?
>
Thank's for the reply,
Yes, I have to search for the pattern, the bit offset not always the
same.
for another thing, it's ok if i can fill up with zero at the LSB or
discard that byte. (the last byte not important)

Rew


From skanemupp at yahoo.se  Fri May 16 16:24:30 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 13:24:30 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com>
Message-ID: <ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>

On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
> On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > i extract info from one file and put it into a dictionary.
> > i want to save that dictionary for later use, how do i do that?
> > might save a list of dictionaries or a list of classobjects too if
> > there is any difference.
>
> use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> ...
> Jay Graves


pickle.dumps(mg)
pickle.load(mg)

'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)


From deets at nospam.web.de  Tue May 20 10:36:20 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 16:36:20 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de>
Message-ID: <69g605F2v4102U2@mid.uni-berlin.de>

> That being said, I use that idiom myself.  But I don't see anything wrong
> with using a list-comp as loop-abbreviation. because that is it's actual
> purpose. And also it is common in non-functional languages that l-values
> aren't always assigned, if the aren't needed. It's the consequence of
> having side-effects in a language - and python has them.

After being corrected about missing the construction of a None-containing
list, one needs of course to think about the waste of resources, as a
possible result-list is created in any case.

I personally still don't mind that (if we talk about a few hundred objects a
top) - but it makes a strong point against a general usage.

Diez


From rossgk at gmail.com  Fri May 30 14:45:22 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 30 May 2008 11:45:22 -0700 (PDT)
Subject: PyDev multiple source files?
References: <a0666463-500b-4ac2-aea6-8cc8fa7d80a0@a1g2000hsb.googlegroups.com>
Message-ID: <3fc76e19-c74d-4158-a9e3-9a595c26fee8@z72g2000hsb.googlegroups.com>

On May 30, 2:10 pm, RossGK <ros... at gmail.com> wrote:

> Now I want to be able to break my single source file up into multiple
> files to segregate functions, divide up with others, etc, but I don't
> know how to configure it.

Found a reference that helped me out:

http://www.python.org/doc/2.1.3/tut/node8.html

The keys for me are that a) a file named junk.py is called a module (I
thought a module was a set of files within a package - nope just a
source file).

Import is the right thing for an 'include' action - but after you
import you need to hierarchically reference the contents of the
imported module.   So if my junk.py 'module' contains a "def things",
then after I have done my "import junk"  I refer to things as
junk.things

Global seem to have a scope of only their current module. So the
question that comes to mind is how to create a global global.  Can I
stick it into __init_.py or something and have it available for the
whole package?


From castironpi at gmail.com  Thu May 15 19:16:18 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:16:18 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>
Message-ID: <0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>

On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > Why can't I write this?
> > > > --
>
> > > Because your antecedent is undefined?
>
> > Of the two ways to play, just to say #define this per se would be a
> > bad move, but that's one that comes from the wrong group. ?#define is
> > a big scary macro, that python hasn't been using; it's the one-line
> > typo. ?Instance:
>
> > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > Use it to render planes in solids.
>
> > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> Jesus H. Christ. This really sounds like my mother in law. Scary,
> definitively.- Hide quoted text -
>
> - Show quoted text -

Definitely.  But, due, I forgot to complete an example.

> > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )

in C.  Python:

life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
exec( life1 )

Where does it go?


From f.pollastri at inrim.it  Thu May 22 05:23:01 2008
From: f.pollastri at inrim.it (Fabrizio Pollastri)
Date: Thu, 22 May 2008 11:23:01 +0200
Subject: merging the global namespaces of two modules
Message-ID: <48353B75.6090809@inrim.it>

Hi,

just an import problem:
a program imports two modules, modA and modB, each module do not known anything 
about the other module (i.e. no cross imports in them), both modules needs to 
refer to some functions that are defined in the global namespace of the other 
module. There is a possible solution? In other words, can the importing program 
cover in some way the lack of cross imports between the modules?
Thank in advance for any help.

F. Pollastri


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 10:10:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 16:10:33 +0200
Subject: Web Framework suggestions for a RIA type application for managing
	lab  specimens
In-Reply-To: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
References: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>
Message-ID: <48245b58$0$11994$426a74cc@news.free.fr>

rynt a ?crit :
> Hello all.
> 
> I'm Looking for suggestions for which Python web framework(e.g.
> Django, Turbogears,etc.) would work best to develop a cross platform
> browser based system to manage lab specimens.
> 
> Requirements are:
> a. highly secure
> b. run on internet or intranet
> e. RDBMS read/write intensive
> d. be able to work on-line or off-line (with automatic updates to db
> when coming back on-line)

can't be handled by a web framework alone - you'll need client-side support.

> e. be able to print reports and labels using a variety of
> printers(laser, deskjet, label printers)

it's mostly a client-side problem.

> f. have a rich set of desktop-like components

A web app is restricted to what's available in HTML (possibly using 
Javascript).

> Perhaps a web based app isn't the way to go.  

Looks like you want a "rich" (desktop) GUI client. Note that (given 
proper design and architecture) you can have a same server-side backend 
for both, but that means quite a lot of code.



From mnikhil at gmail.com  Tue May 20 14:19:17 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:49:17 +0530
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
Message-ID: <g0v4n8$4dk$1@registered.motzarella.org>

Nikhil wrote:
> Hi,
> 
> I am using python -i, and I find it hard typing/pasting the commands 
> from the previous interactive shell. Basically, is there anyway that I 
> can preserve the history in the shell?
> I guess but not sure there should be something like ~/.pyrc for 
> configuring such but can someone please let me know what is the 
> effective environment variable to preserve the history?
> 
> Thanks,
> Nikhil
I figured it out. This below thing works fine for me.
BTW, I got it from http://docs.python.org/tut/node15.html. A little 
search would not hurt ;-)


$ echo $PYTHONSTARTUP
/u/me/.pyrc
$ cat .pyrc
import sys
import atexit
import os
import readline
import rlcompleter

myprompt='$ '
myhistoryfile="/u/me/.pyhistory"

#set the prompt
sys.ps1=myprompt

#save the history
historyPath = os.path.expanduser(myhistoryfile)

def save_history(historyPath=historyPath):
     import readline
     readline.write_history_file(historyPath)

if os.path.exists(historyPath):
     readline.read_history_file(historyPath)

atexit.register(save_history)
del os, atexit, readline, rlcompleter, save_history, historyPath


From castironpi at gmail.com  Fri May 16 09:02:03 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:02:03 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<96f60dc3-fe60-45fa-befe-70d7ae5a330a@d77g2000hsb.googlegroups.com> 
	<482c4934$0$6041$426a74cc@news.free.fr>
	<60e2ee6e-955a-49f2-a87a-ad8c3908d2c8@l42g2000hsc.googlegroups.com>
Message-ID: <4df6f806-5ccc-4837-a632-699b7c986645@y38g2000hsy.googlegroups.com>

On May 16, 3:22?am, martindesali... at gmail.com wrote:
> look at module re (rgular expression) or pyparser
>
> seehttp://nedbatchelder.com/text/python-parsers.html

This ties in to 'call tree tool?' from yesterday.  Do we have any
visualization modules?  My two examples were 're' and 'call trees'


From bignose+hates-spam at benfinney.id.au  Thu May  1 23:25:55 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 May 2008 13:25:55 +1000
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
Message-ID: <8763tx1j5o.fsf@benfinney.id.au>

Brendan Miller <catphive at catphive.net> writes:

> Is there an actual portable means of asynchronously spawning a
> process and getting a handle to it, being able to write stdin and
> read stdout, or does everyone just write their own wrapper for fork
> and spawn?

You're looking for the 'subprocess' module in the standard library
<URL:http://docs.python.org/lib/module-subprocess.html>.

-- 
 \     "If you can't annoy somebody there is little point in writing." |
  `\                                                  -- Kingsley Amis |
_o__)                                                                  |
Ben Finney


From mal at egenix.com  Fri May 30 16:37:14 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 30 May 2008 22:37:14 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <g1p781$2j1$00$1@news.t-online.com>
References: <mailman.1766.1212150318.12834.python-list@python.org>
	<g1p781$2j1$00$1@news.t-online.com>
Message-ID: <4840657A.2000904@egenix.com>

On 2008-05-30 17:41, Peter Otten wrote:
> Josep wrote:
> 
>> I'm playing with an application framework (or kinda) that's developed
>> with python, and it throws this error:
>>
>>
>>> File
>>> "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py",
>>> line 281, in execute
>>>     sql = unicode(sql, self.Encoding)
>>> LookupError: unknown encoding: utf_8_euro
>> At the application (DABO) mailing list, they have pointed that this has
>> to be a Python issue. As I'm a totally python newbie, I would ask if
>> somebody has experimented this kind of error, and if there is any known
>> solution. I've found no clue searching at Google right now.
>>
>> My Python version is 2.5.2, Ubuntu Hardy .deb package.
> 
> Python might get confused by an @EURO suffix in the locale:

Right, that's what's happening.

The locale module uses a locale aliasing table that help map environment
locale settings to C local names.

That table was last updated in 2004 and since then a lot more
locale variable strings have made their way into the Linux
distros.

I guess we need to update the table...

> $ LANG=de_DE.UTF-8 at EURO
> $ python -c"import locale; print locale.getdefaultlocale()"
> ('de_DE', 'utf_8_euro')
> 
> Try setting the LANG environment variable to something like
> 
> $ LANG=de_DE.UTF-8
> $ python -c"import locale; print locale.getdefaultlocale()"
> ('de_DE', 'UTF8')
> 
> before you run your program (use ca_ES or whatever you need instead of
> de_DE).
> 
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 30 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From tjreedy at udel.edu  Mon May 12 18:43:49 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 18:43:49 -0400
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no> <m2skwo2fuj.fsf@googlemail.com>
	<c689625d-b2d2-4268-ae40-15e3c9b78ea2@x41g2000hsb.googlegroups.com>
Message-ID: <g0ah73$hod$1@ger.gmane.org>


"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:c689625d-b2d2-4268-ae40-15e3c9b78ea2 at x41g2000hsb.googlegroups.com...

here is a very sophisticated implementation :)

>>> def extract(indices, seq):
...     return tuple(seq[i] for i in indices)
...
>>> y, d = extract((0, 2), time.localtime())
>>> y, d
(2008, 12)

===================
Or a generator version:

# 3.0
def extract(iterable, indexes):
    # assume indexes are all legal
    enext = enumerate(iterable).__next__
    i,item = enext()
    for index in indexes:
        while i < index:
            i,item = enext()
        yield item

import time
print(list(extract(time.localtime(), (0,2))))

#prints [2008, 12] 





From onsen-neko at gmx.net  Thu May  8 03:22:57 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Thu, 8 May 2008 09:22:57 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.716.1210187999.12834.python-list@python.org>
	<40145aba-c389-4aa4-bb6a-faf2e7de12c8@s50g2000hsb.googlegroups.com>
Message-ID: <200805080922.58139.onsen-neko@gmx.net>

Am Donnerstag 08 Mai 2008 00:12:26 schrieb 
bruno.desthuilliers at gmail.com:

> very often sees do-nothing catch-all try/catch blocks in Java - which
> is way worse than just letting the exception propagate. I find all
> this totally pointless, because there's just no way for a compiler to
> check if your code is logically correct.

But it's enough if the called method exists and returns the correct 
type. At least it prevents a crash.

> > Interfaces work at
> > compile-time, while method-stubs raise at their first call, so in
> > worst case, never.
> And then ? If it's never called, why bother implementing it ?

You never can't say when it's called at least, that's the point. 

> > That's the point. Interfaces garantee that a duck is a duck, an not
> > only a chicken that quack.
> Who cares if it's a chicken as long as it quacks when you ask her to
> ? Now *This* is the whole point of chicken^Mduck typing, isn't it ?-)

Ducks can also swim and fly. And if you need a really duck, but have 
onyl a chicken while the coder was to bored to make one...

Of course, in the practical world that all doesn't  matter. But in the 
theoretical world of the big coding farms, called business, that's one 
cornerstone of success, in the tinking of managers and so.


From stefan_ml at behnel.de  Sat May 10 01:43:58 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sat, 10 May 2008 07:43:58 +0200
Subject: PyXml
In-Reply-To: <mailman.892.1210376249.12834.python-list@python.org>
References: <mailman.890.1210367123.12834.python-list@python.org>
	<mailman.892.1210376249.12834.python-list@python.org>
Message-ID: <4825361E.8000102@behnel.de>

Martin v. L?wis wrote:
>> Can anyone recommend a Python validating parser that validates vs Xml
>> Schema?
> 
> The libxml bindings for Python can do that.

... although the OP will likely prefer using lxml, where it's three lines of
Python (ok, plus an import), compared to quite a bit of code in the official
libxml2 bindings.

http://codespeak.net/lxml

Stefan


From lucaspm at dcc.ufba.br  Fri May  9 09:25:21 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Fri, 9 May 2008 10:25:21 -0300
Subject: "prove"
In-Reply-To: <48240c00$0$7184$426a74cc@news.free.fr>
References: <mailman.770.1210254618.12834.python-list@python.org>
	<48240c00$0$7184$426a74cc@news.free.fr>
Message-ID: <9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>

On Fri, May 9, 2008 at 5:32 AM, Bruno Desthuilliers
<bruno.42.desthuilliers at websiteburo.invalid> wrote:
> Why do you need the documentation ? Just fire up your python shell and hack
> a Q&D example:
I agree. I said it to this person, but he insisted I should use documentation...


From castironpi at gmail.com  Wed May 14 14:20:59 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:20:59 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com> 
	<8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com> 
	<5cedfda6-a64a-456a-ab90-ed33229036a2@b64g2000hsa.googlegroups.com>
Message-ID: <2565a3a8-232d-4bac-b8ce-2e202b2f3f93@d77g2000hsb.googlegroups.com>

On May 14, 1:16?pm, castiro... at gmail.com wrote:
> On May 14, 1:09?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:07?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > > > How does it generate text?
>
> > > > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > > > place to start the ring.
>
> > > > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > > > some cubic verticals.
>
> > > > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > > > can pretty well win work.- Hide quoted text -
>
> > > > > > - Show quoted text -
>
> > > > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > > > - Show quoted text -
>
> > > > If Python can plot in to chess, and Tron rings live, then why not
> > > > group it knew?- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > That would be know. ?Plot and split in too.- Hide quoted text -
>
> > > - Show quoted text -
>
> > Now can I catch function-type objects from a throw? ?I'm crossing all
> > of those.- Hide quoted text -
>
> > - Show quoted text -
>
> I have destin and fate and die, growth sustanance and decay. ?Now cars
> are important, but not logically still. ?I am certain I play, so;
> where's the ring?- Hide quoted text -
>
> - Show quoted text -

It's just an 8x8 cross, but I'm just; have isn't in me.


From jcd at unc.edu  Mon May  5 11:11:35 2008
From: jcd at unc.edu (J. Cliff Dyer)
Date: Mon, 05 May 2008 11:11:35 -0400
Subject: pygame music, cant read mp3?
In-Reply-To: <a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com>
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com>
Message-ID: <1210000295.24836.11.camel@aalcdl07.lib.unc.edu>

On Mon, 2008-05-05 at 07:32 -0700, globalrev wrote:
> On 5 Maj, 16:29, globalrev <skanem... at yahoo.se> wrote:
> > On 5 Maj, 16:09, globalrev <skanem... at yahoo.se> wrote:
> >
> >
> >
> > > On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
> > > wrote:
> >
> > > > 2008/5/5, globalrev <skanem... at yahoo.se>:
> >
> > > > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
> >
> > > > Are you sure that:
> >
> > > > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
> >
> > > > Check it with python.
> >
> > > > --
> > > > Regards,
> > > > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
> > > >>> import os
> > > >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
> >
> > > False
> >
> > > but...it is there....
> >
> > > >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
> >
> > > False
> >
> > > does it matter if i use / or \? which si recommended?
> >
> > i can find .png image in the same folder and when i just change
> > filename from snake.png to example1.mp3 it is false.
> >
> > i renamed the file once, could that have anything to do with it?
> 
> \\ or \ or / all works.
> 
> 
> the title of the mp3 is a long number still. i mena if i go to
> properties the name is example1.mpg but the title if i go to details
> is stillt he old one.
> 

Now I'm confused.  What is the name of the *file* on the filesystem?
You can verify this using

>>> os.listdir('C:/Python25/myPrograms/pygameProgs')

As for the question of \\ vs. \ vs. /:  Windows will accept forward
slashes, but you may run into trouble later on down the line if windows
treats one of your forward slashes as a command line option.  The native
format is to use backslashes as separators, but backslashes need to be
escaped in python's regular string literals, because of escape
sequences.  Single backslashes seem to be working for you, but that's
only because you've been lucky in not having escape characters following
your backslash.  Particularly, x, n, t, u, and U will cause trouble.
Probably others.

Cut'n'paste example:

$ python
Python 2.4.3 (#1, Dec 11 2006, 11:38:52) 
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> '\efoo'
'\\efoo'
>>> '\dfoo'
'\\dfoo'
>>> '\ufoo'
'\\ufoo'
>>> '\uabcd'
'\\uabcd'
>>> u'\uabcd'
u'\uabcd'
>>> u'\ufoo'
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position
0-4: end of string in escape sequence
>>> '\xfoo'
ValueError: invalid \x escape
>>> '\nfoo'
'\nfoo'
>>> print '\nfoo'

foo
>>>

Notice that the \ gets doubled (escaped) automatically by python in many
of the instances, but not for the \n, and an exception gets raised for
\u (in unicode strings only), and for \x (in regular strings too).  It's
safer just to escape your strings yourself.  So 'C:\\foo' is always
better than 'C:\foo', even though the latter may sometimes work.  Better
still is to create a list of directories, and use os.path.join(dirlist)
as follows:

directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
os.path.join(directory)

Then python can worry about the gritty details, and you don't have to.

-- 
Oook,
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From mikael at isy.liu.se  Tue May 13 03:15:19 2008
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 13 May 2008 09:15:19 +0200
Subject: passing *args "recursively"
In-Reply-To: <g0b2ot$mls$1@news.lysator.liu.se>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
	<g0b2ot$mls$1@news.lysator.liu.se>
Message-ID: <g0b2te$mls$2@news.lysator.liu.se>

Guillermo wrote:
>> This must be very basic, but how'd you pass the same *args several
>> levels deep?
>>
>> def func2(*args)
>>     print args # ((1, 2, 3),)
>>     # i want this to output (1, 2, 3) as func1!
>>     # there must be some better way than args[0]?
>>
>> def func1(*args):
>>     print args # (1, 2, 3)
>>     func2(args)
>>
>> func1(1,2,3)

Me, myself and I wrote:
> func2(*args)
> 
> Thats all. See 
> http://docs.python.org/tut/node6.html#SECTION006740000000000000000

That was a bit unclear. You should use func2(*args) when you call the 
function.

/MiO


From nick at craig-wood.com  Fri May 23 05:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 04:30:09 -0500
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
Message-ID: <slrng3d34k.3re.nick@irishsea.home.craig-wood.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
> > Can someone suggest an efficient way of calling method whose name is
> > passed in a variable?
> > 
> 
>  method = getattr(obj, 'method_name', None)
>  if callable(method):
>       method(args)

I think that that is needless LBYL...

   getattr(obj, 'method_name')(args)

Will produce some perfectly good exceptions

    >>> class A(object):
    ...     def __init__(self):
    ...             self.x = 2
    ...     def f(self, x):
    ...             print x == self.x
    ...
    >>> obj = A()
    >>> getattr(obj, 'floop')(1)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    AttributeError: 'A' object has no attribute 'floop'
    >>> getattr(obj, 'x')(1)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: 'int' object is not callable
    >>> getattr(obj, 'f')(1)
    False
    >>>

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kiskeke at gmail.com  Fri May  9 06:15:16 2008
From: kiskeke at gmail.com (kiskeke at gmail.com)
Date: Fri, 9 May 2008 03:15:16 -0700 (PDT)
Subject: here is the coolest site in the world, what I've talked about last 
	time: http://tinyurl.com/4e4smx
Message-ID: <21372592-fab9-4ec7-8e53-cb7ef1a92390@25g2000hsx.googlegroups.com>

here is the coolest site in the world, what I've talked about last
time: http://tinyurl.com/4e4smx


From usenet at solar-empire.de  Wed May 21 15:22:22 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Wed, 21 May 2008 21:22:22 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
Message-ID: <ec9eg5-7lm.ln1@pluto.solar-empire.de>

Mark Dickinson <dickinsm at gmail.com> wrote:
> On SuSE 10.2/Xeon there seems to be a rounding bug for
> floating-point addition:
> 
> dickinsm at weyl:~> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> a = 1e16-2.
>>>> a
> 9999999999999998.0
>>>> a+0.999     # gives expected result
> 9999999999999998.0
>>>> a+0.9999   # doesn't round correctly.
> 10000000000000000.0
> 
> The last result here should be 9999999999999998.0,
> not 10000000000000000.0.  Is anyone else seeing this
> bug, or is it just a quirk of my system?

On my system, it works:

 Python 2.5.2 (r252:60911, May 21 2008, 18:49:26) 
 [GCC 4.1.2 (Gentoo 4.1.2 p1.0.2)] on linux2
 Type "help", "copyright", "credits" or "license" for more information.
 >>> a = 1e16 - 2.; a
 9999999999999998.0
 >>> a + 0.9999
 9999999999999998.0

Marc


From grante at visi.com  Sun May 11 11:02:07 2008
From: grante at visi.com (Grant Edwards)
Date: Sun, 11 May 2008 10:02:07 -0500
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<mailman.939.1210505979.12834.python-list@python.org>
Message-ID: <Ms2dncFBEtLyl7rVnZ2dnUVZ_vzinZ2d@posted.visi>

On 2008-05-11, Max M <maxm at mxm.dk> wrote:
> wxPythoner at gmail.com skrev:
>
>> I have two another interesting things to discuss about, for
>> which I'll open new posts on this group. Look for "Python
>> doesn't recognize quote types" and "Python, are you ill?".
>
> You have a tendency to form your questions as complaints about
> Python being broken.
>
> You will probably get better responses if you just state that
> there are things you do not understand, and ask why it works
> that way.

The OP has already been banned from the wxWidgets IRC and the
wxPython mailing list.  His MO is to post a never ending stream
of whining, flame-bait, and demands that wxWidgets, wxPython,
(or whatever) be changed to suit his tastes regardless of the
justification for the current design and the amount of breakage
it would cause. wxPythoner (AKA "Chester) also seemed fond of
constantly giving wrong/misleading answers when other
inexperienced users asked technical questions.

He especially liked to post messages with subjects like "To
Rogin Dunn" and "To wxPython Developers" mailing list
instructing them to change various things in wxWidgets,
wxPython, and Python.  He consistently ignored pointers to
documentation and explanations of why things were done the way
they were.  

On top of all that, his fowl language and insulting attitude
finally got him banned:

http://article.gmane.org/gmane.comp.python.wxpython/58645
http://article.gmane.org/gmane.comp.python.wxpython/58695

So it's best to probably just ignore him...

-- 
Grant Edwards                   grante             Yow!  LBJ, LBJ, how many
                                  at               JOKES did you tell today??!
                               visi.com            


From upton at virginia.edu  Wed May 21 15:29:33 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 15:29:33 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<mailman.1428.1211385657.12834.python-list@python.org>
	<7ae9cb4f-60bf-4e77-826c-03248cca4027@w4g2000prd.googlegroups.com>
Message-ID: <5504f9ac0805211229teec955dhe7beccc59aede9ce@mail.gmail.com>

On Wed, May 21, 2008 at 12:11 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 10:00 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>> Sounds to me like the teacher is being difficult, ...
>
> No, proof-by-contradiction is a common technique in math.  If you can
> show that x=8 and x=10, then you have shown that your assumptions were
> incorrect.

Yes, I'm aware of proof by contradiction.  However, I think there's a
flaw in your use of this to justify your case--proof by contradiction
would essentially be showing x=8 and x=10 simultaneously, whereas the
sequence of instructions

x=8
x=10

imply a time relation, and there's no contradiction that x equals
something at one point in time, and something else at another point in
time.  (For any kid who is capable of understanding variables anyway,
just tell them something to the effect of "Plot the line y=x.  Okay,
now let 'y' be time.  At no point in time does x take on two values,
but it may take on different values at different points in time.  Same
concept.")

>
>> If you can't do, or don't like, math, you probably shouldn't be
>> programming.
>
> Why not?  Recipes are programs.  I prefer to look at it the other way:
> an easy-to-use programming language might encourage more people to
> like math.

To continue your analogy, if a recipe is the program, a person is the
computer.  Following a recipe is (relatively) easy, making up a new
recipe is relatively difficult unless you understand, or are at least
willing to tinker with, things like interactions between ingredients
and flavors.  Likewise, it's tedious and time-consuming but not
necessarily difficult to follow a program (assuming you understand the
rules of the language; I suppose here you could make some argument
"it'd be easier to read it in English"), but you need to understand
more about symbolic reasoning and such to be able to do much in the
way of programming.

All the same, I suppose you might have a point there, if you can show
somebody something cool while sneaking in the math and programming
such that they learn without even realizing it--somewhat akin to the
guy who a month or so ago wanted to sneakily teach his high school
class programming fundamentals by teaching them game programming.

>> You keep trotting out this quadratic equation example, but does FT
>> actually have any kind of useful equation solver in it?
>
> Not yet, but it will.  Probably around July.

Maybe this should be your selling point, and maybe you should be
drawing comparisons to programming in Matlab or Mathematica.


From daveparker at flamingthunder.com  Mon May 12 20:59:27 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:59:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
Message-ID: <eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>

On May 12, 6:32?pm, castiro... at gmail.com wrote:
> Can you render some furniture for me... to try to see some human
> posture to lowest energy levels.

I couldn't find any furniture created using DPGraph, but the math art
gallery at http://www.dpgraph.com/math-art.html has a sailboat, an
F15, Tux (the Linux penguin), a lampshade, and lots of other things
that will soon be doable in Flaming Thunder.


From johnjsal at NOSPAMgmail.com  Tue May 20 13:26:38 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:26:38 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <027e0cd4$0$26948$c3e8da3@news.astraweb.com>

"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9AA470833CCA8duncanbooth at 127.0.0.1...

> That is true when run interactively, but the behaviour changes again if 
> you
> run it as a script:

Yeah, I forgot to mention that you shouldn't rely on this behavior. :) 




From spectrumdt at gmail.com  Fri May  9 11:22:49 2008
From: spectrumdt at gmail.com (spectrumdt at gmail.com)
Date: Fri, 9 May 2008 08:22:49 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
	<68aqoeF2rue80U1@mid.uni-berlin.de>
Message-ID: <9a66d295-2d05-455b-a825-dd0c75292917@e39g2000hsf.googlegroups.com>

Thanks for the reply.

I've found and installed the package containing pvm3.h. (The file is
now located under "share/pvm3/include/pvm3.h".) But Pypvm can't find
it.

Someone recommended that I install the equivalent of what is called
"build-essential" in Ubuntu. I was told that the equivalent can be
achieved in Fedora like this:

sudo yum groupinstall "Development Tools" --exclude=systemtap --
exclude=systemtap-runtime

I don't quite understand what these packages are supposed to do, but
they don't seem to help.

Can anyone tell me how to make (the installation program for) Pypvm
understand where the header file is?

Thanks in advance.


From grante at visi.com  Sun May 18 00:46:34 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 17 May 2008 23:46:34 -0500
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <dvSdnTorEJA3KbLVnZ2dnUVZ_u2dnZ2d@posted.visi>

On 2008-05-13, Rajarshi <rajarshi.guha at gmail.com> wrote:

> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?

Have you heard of a company called Google?  They use Python a
lot.

Another company you may have heard of is IBM. I have a laptop
made by them.  It came with Python pre-installed because a
bunch of the system utilities are written in Python.  I think
I've heard that HP and Compaq do the same (I can't verify it
personally).

If you've heard of Linux, there's a company called RedHat that
wrote their system installer and packaging/system-admin stuff
in Python.

-- 
Grant



From tjreedy at udel.edu  Tue May 13 17:32:04 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:32:04 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com><2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de><dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com><2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <g0d1ch$mb5$1@ger.gmane.org>


"Dave Parker" <daveparker at flamingthunder.com> wrote in message 
news:f6625824-b556-41c2-986e-4b1f32df5434 at n1g2000prb.googlegroups.com...
|> 5-10 times faster for what kind of code?

| Mostly numerical analysis and CGI scripting.

For numerical analysis, a fair comparison is Python with NumPy installed 
(or the older versions thereof). 





From stefan_ml at behnel.de  Sun May 25 15:33:10 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Sun, 25 May 2008 21:33:10 +0200
Subject: UTF problem?
In-Reply-To: <slrng3jf96.hio.sarenius@sun3.oulu.fi>
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
Message-ID: <4839BEF6.3060209@behnel.de>

Vesa-Matti Sarenius wrote:
> This did not work. Neither did commenting all print lines. The problem is
> somewhere else.

As Tim said, the line number that the exception prints would help here.

Stefan


From szhorvat at gmail.com  Mon May  5 10:08:02 2008
From: szhorvat at gmail.com (Szabolcs)
Date: Mon, 5 May 2008 07:08:02 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1> 
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no> 
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com> 
	<Xns9A9573FC740FBduncanbooth@127.0.0.1>
Message-ID: <bce1b718-ad05-4ecf-9bb1-d2925bc57214@2g2000hsn.googlegroups.com>

On May 5, 12:24?pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Szabolcs <szhor... at gmail.com> wrote:
> > On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> >> Gabriel Genellina wrote:
>
> >> > Python doesn't require __add__ to be associative, so this should
> >> > not be
> > used as a general sum replacement.
>
> >> It does not _require_ this, but using an __add__ that is not
> >> commutative and associative, or has side effects, would qualify as a
> >> serious misuse, anyway.
>
> > Sorry, I meant associative only, not commutative.
>
> Unfortunately an __add__ which is not associative is actually perfectly
> reasonable.

Well, 'reasonable' is a subjective notion in this case :-)  I have
never seen a non-associative use of the plus sign in maths, so I would
tend to take associativity for granted when seeing a + b + c in code,
therefore I would avoid such uses.  (Multiplication signs are a
different story.)  Of course others may feel differently about this,
and technically there's nothing in the way of using a non-associative
__add__! :)

> For example you could have a Tree class where adding two trees
> returns a new tree so (a+b)+c gives you:
>
> ? ? .
> ? ?/ \
> ? ?. ?c
> ? / \
> ? a ?b
>
> but a+(b+c) gives:
>
> ? ? .
> ? ?/ \
> ? ?a ?.
> ? ? ?/ \
> ? ? ?b ?c



From workitharder at gmail.com  Fri May 23 02:21:50 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 23:21:50 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<4moZj.13958$hv2.3334@bignews5.bellsouth.net>
Message-ID: <e065ef4c-45ce-475f-b72a-01ec54defb67@z24g2000prf.googlegroups.com>

On May 22, 5:39?pm, "inhahe" <inh... at gmail.com> wrote:
> >> 1
> >> 2
>
> actually, you don't want it to print 3 also? ?if not, then you would do
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args[:1])
>
> > import inspect
> > f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>
>

No, that was a typo. Thanks tho.


From zerge69 at gmail.com  Wed May 21 07:53:54 2008
From: zerge69 at gmail.com (zerge69 at gmail.com)
Date: Wed, 21 May 2008 04:53:54 -0700 (PDT)
Subject: How to transfer files over serial?
References: <dc9268f1-061e-48a8-8598-420f35fc858a@u12g2000prd.googlegroups.com>
Message-ID: <3e728bac-681c-48f1-9dde-3ec84d9e07b5@y18g2000pre.googlegroups.com>

On May 21, 4:07 am, RaymondHe <hrp... at gmail.com> wrote:
> I want to transfer files over serial,but PySerial Module does not
> support any protocol such as xmodem/ymodem,and I find nothing about
> these protocol write in python
>
> What should I do?Thank you

Does it have to be over the serial? If not, and what you really want
to do is transfer information between machines, you may want to take a
look at the socket library.


From eckhardt at satorlaser.com  Thu May 29 11:49:53 2008
From: eckhardt at satorlaser.com (Ulrich Eckhardt)
Date: Thu, 29 May 2008 17:49:53 +0200
Subject: boost
References: <MPG.22a8d3da9bdd926998968c@news.t-com.hr>
Message-ID: <1uv2h5-dii.ln1@satorlaser.homedns.org>

deepest1 wrote:
> bjam --build-dir="D:\Program Files\boost_1_35_0" --toolset=gcc stage
> 
> I got 12 failures and 8 warnings from this (other few hundrds were ok)

Hmm, I remember trying to use Boost 1.35 with Python 2.5 on my Debian system
and also having problems, are you sure that at least the Python helper libs
are correctly compiled?

> E:\Source>g++ World.cpp
> World.cpp:1:28: boost/python.hpp: No such file or directory

Try -I "D:\Program Files\boost_1_35_0" as additional argument. Further, you
will need to tell g++ to link with the according boost library
(-lboost_python or something like that) and where it can find that lib
(-L"D:\Program Files\boost_1_35_0\stage").

Uli

-- 
Sator Laser GmbH
Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From google at mrabarnett.plus.com  Mon May 12 12:47:03 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Mon, 12 May 2008 09:47:03 -0700 (PDT)
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
	<Xns9A9B83DE83757duncanbooth@127.0.0.1>
	<SeWdnTid7Z7GwLrVnZ2dnUVZ_gKdnZ2d@earthlink.com> 
	<Xns9A9C5539CF188duncanbooth@127.0.0.1>
Message-ID: <ea11fc49-ad80-4707-b178-ba84f254385d@w7g2000hsa.googlegroups.com>

On May 12, 8:31 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> >      The sloppy use of "single quote" for the "apostrophe" is unfortunate
> ><G>
>
> True, but that problem is outside of the Python community's control. Given
> that people do often refer to single quote when they mean apostrophe the
> error message should be written so as to minimise confusion.

FYI, there are actually 2 types of quote character, single and double,
each with 2 forms, left and right. In Unicode the single-quote
characters are U+2018 (?) and U+2019 (?) and the double-quote
characters are U+201C (?) and U+201D (?). The right-hand single-quote
is also the apostrophe.

In order to reduce the size of the character set needed, computer
manufacturers introduced 'sexless' quote characters, the single-quote/
aphostrophe U+0027 (') and double-quote U+0022 (").


From jstucklex at attglobal.net  Fri May 23 07:41:59 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Fri, 23 May 2008 07:41:59 -0400
Subject: php vs python
In-Reply-To: <UTrZj.2635$772.1119@bignews2.bellsouth.net>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
	<k9ydnTzDkfLjqKvVnZ2dnUVZ_gSdnZ2d@comcast.com>
	<UTrZj.2635$772.1119@bignews2.bellsouth.net>
Message-ID: <WvSdna8685IJMKvVnZ2dnUVZ_o2dnZ2d@comcast.com>

inhahe wrote:
>> PHP can do that.  There are also a number of templating engines
>> available.  The nice thing about PHP is you have a choice.
> 
> i just meant that php is sort of invented to combine html and code, so if 
> you use python instead you should use a templating engine.  but i suppose 
> it's useful for php too.
> 
> 

Not at all.  With PHP, it's possible to do so, but not required.  With 
Python, OTOH, you pretty much have to use a templating engine.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From aaron.hildebrandt at gmail.com  Wed May 28 16:39:02 2008
From: aaron.hildebrandt at gmail.com (Aaron Scott)
Date: Wed, 28 May 2008 13:39:02 -0700 (PDT)
Subject: Writing a function from within Python
Message-ID: <be806421-e26e-4a2b-9788-4f0178e5002f@j33g2000pri.googlegroups.com>

Is it possible to change the content of a function after the function
has been created? For instance, say I make a class:

	class MyClass:
		def ClassFunction(self):
			return 1

And I create an object:

	MyObject = MyClass()

Is there any way to change the content of the function, a la pseudo-
code:

	MyObject.ClassFunction = "return 2"

Thanks for any insight you might be able to offer.


From gherron at islandtraining.com  Sat May 17 20:18:39 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 17 May 2008 17:18:39 -0700
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>	<482E21F4.1090809@islandtraining.com>	<BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>	<482F0090.4030003@islandtraining.com>
	<BAY135-W500042D0AE1B18D327C2949FCB0@phx.gbl>
Message-ID: <482F75DF.1020700@islandtraining.com>

Marlin Rowley wrote:
> Actually in my traversal of the never-ending maze of understanding 
> arrays in python, I stumbled that the data in the wrong sequence.
>
> Let's get back to this transpose() deal, say we have these values as 
> integers (representing rgba again):
>
> [[[0,1,2,3]
> [4,5,6,7]
> [8,9,10,11]
> [12,13,14,15]]
>
> [[16,17,18,19]
> [20,21,22,23]
> [24,25,26,27]
> [28,29,30,31]]]
>
> Now if I do this: transpose((2,0,1)), I get this:
>
> [[[0,4,8,12] [16,20,24,28]]
> [[1,5,9,13] [17,21,25,29]]
> [[2,6,10,14][18,22,26,30]]
> [[3,7,11,15][19,23,27,31]]]
>
> This is NOT what I want. I want the new array to be:
>
> [0,4,8,12][1,5,9,13]
> [2,6,10,14][3,7,11,15]
> [16,20,24,28][17,21,25,29]
> [18,22,26,30][19,23,27,31]
>
> How do I do this?

That's s little ambiguous, but one of the following two 
transpose-reshape-print's might be what you want.

Gary Herron


import numpy

a = numpy.array([[[0,1,2,3],
[4,5,6,7],
[8,9,10,11],
[12,13,14,15]],

[[16,17,18,19],
[20,21,22,23],
[24,25,26,27],
[28,29,30,31]]])


print numpy.reshape(a.transpose(0,2,1), (8,4))
print numpy.reshape(a.transpose(0,2,1), (4,2,4))

output is:

[[ 0 4 8 12]
[ 1 5 9 13]
[ 2 6 10 14]
[ 3 7 11 15]
[16 20 24 28]
[17 21 25 29]
[18 22 26 30]
[19 23 27 31]]

and

[[[ 0 4 8 12]
[ 1 5 9 13]]

[[ 2 6 10 14]
[ 3 7 11 15]]

[[16 20 24 28]
[17 21 25 29]]

[[18 22 26 30]
[19 23 27 31]]]



>
> -M
>
>
>
>
>
> ------------------------------------------------------------------------
>
> > Date: Sat, 17 May 2008 08:58:08 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com
> > CC: python-list at python.org
> > Subject: Re: numpy.frombuffer != unpack() ??
> >
> > Marlin Rowley wrote:
> > >
> > > Very cool.
> > >
> > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > a represents a tile with height of 2 and width of 4 with 4 bits/pixel
> > > for each color.
> > >
> > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
> > > this seperates the stream into individual values - Check
> > >
> > > > >>> b.shape=(2,4,4)
> > >
> > > This reshapes the array so that b.shape=(height,width,#bits/pixel) 
> - Check
> > >
> > > >>> c = b.transpose((2,0,1))
> > >
> > > What does the (2,0,1) represent in terms of width and height and
> > > number of bytes?
> >
> > The (2,0,1) tells how to exchange the axes. For instance in a 2D array,
> > a normal transpose exchanges rows and columns. It will change a (a by
> > b) sized array into a (b by a) sized array. This would be equivalent to
> > the more saying interchange axes 0,1 to the new order of 1,0.
> >
> > In numpy with higher dimension arrays, the default transpose just
> > exchanges the first two axes, and the full transpose allows you to
> > specify exactly the new ordering of the exes.
> >
> > So transpose((2,0,1)) means take axes (0,1,2) to the new order
> > (2,1,0). In terms of sizes, an (a by b by c) sized array will end being
> > of size (c by a by b) in size.
> >
> > In terms of implementation, there may not be *any* data re-arrangement
> > in a transpose. The only thing that needs changing is how the indices
> > are converted to an actual machine address of an indexed item. The
> > documentation notes this by saying transpose returns a "new view" of 
> the
> > array. This explains why I copied the array before extracting bytes
> > out of it -- you really do need the elements in the new order for the
> > next operation.
> >
> > Gary Herron
> >
> > >
> > >
> > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > > Date: Fri, 16 May 2008 17:08:20 -0700
> > > > From: gherron at islandtraining.com
> > > > To: marlin_rowley at hotmail.com; python-list at python.org
> > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > >
> > > > Marlin Rowley wrote:
> > > > > All:
> > > > >
> > > > > Say I have an array:
> > > > >
> > > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > > >
> > > > > How do I make it so that I now have:
> > > > >
> > > > > starting with first element (a[0])
> > > > > new_arr[0] = 'r'
> > > > > new_arr[1] = 'g'
> > > > > new_arr[2] = 'b'
> > > > > new_arr[3] = 'a'
> > > > > new_arr[4] = 'r'
> > > > > .....
> > > > >
> > > > > continuing "through" a[1] with the same new_arr
> > > > > new_arr[N] = 'r'
> > > > > new_arr[N+1] = 'g'
> > > > > ....
> > > > >
> > > > > -M
> > > >
> > > > Numpy can do this for you. First, do you really mean the array to
> > > > contain lists of one string each? If so:
> > > >
> > > > >>> import numpy
> > > > >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
> > > > >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a
> > > > kludge here
> > > > >>> b
> > > > array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 
> 'b', 'a',
> > > > 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',
> > > > 'b', 'b', 'a', 'a', 'a', 'a'],
> > > > dtype='|S1')
> > > > >>> b.shape=(2,4,4)
> > > > >>> b
> > > > array([[['r', 'r', 'r', 'r'],
> > > > ['g', 'g', 'g', 'g'],
> > > > ['b', 'b', 'b', 'b'],
> > > > ['a', 'a', 'a', 'a']],
> > > >
> > > > [['r', 'r', 'r', 'r'],
> > > > ['g', 'g', 'g', 'g'],
> > > > ['b', 'b', 'b', 'b'],
> > > > ['a', 'a', 'a', 'a']]],
> > > > dtype='|S1')
> > > > >>> c = b.transpose((2,0,1))
> > > > >>> c
> > > > array([[['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']],
> > > >
> > > > [['r', 'g', 'b', 'a'],
> > > > ['r', 'g', 'b', 'a']]],
> > > > dtype='|S1')
> > > > >>> d=c.copy() # To make it contiguous
> > > > >>> d.shape = (32,)
> > > > >>> d
> > > > array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 
> 'a', 'r',
> > > > 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',
> > > > 'b', 'a', 'r', 'g', 'b', 'a'],
> > > > dtype='|S1')
> > > >
> > > > Done. Cool no?
> > > >
> > > > Gary Herron
> > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > From: marlin_rowley at hotmail.com
> > > > > To: robert.kern at gmail.com; python-list at python.org
> > > > > Subject: RE: numpy.frombuffer != unpack() ??
> > > > > Date: Fri, 16 May 2008 17:31:30 -0500
> > > > >
> > > > > Thank you! That solved it!
> > > > >
> > > > > -M
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > >
> > > > > > To: python-list at python.org
> > > > > > From: robert.kern at gmail.com
> > > > > > Subject: Re: numpy.frombuffer != unpack() ??
> > > > > > Date: Fri, 16 May 2008 17:25:00 -0500
> > > > > >
> > > > > > Marlin Rowley wrote:
> > > > > > > All:
> > > > > > >
> > > > > > > I'm getting different floating point values when I use numpy
> > > > > vs. unpack().
> > > > > > >
> > > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
> > > > > > > buffer = unpack("!f", byte)
> > > > > > >
> > > > > > > frgba[0] != buffer[0]
> > > > > > >
> > > > > > > why? This is forcing me use the unpack() function since it's
> > > > > giving me
> > > > > > > the correct values. What am I doing wrong?
> > > > > >
> > > > > > Endianness, perhaps? '!' specifies big-endian data (an alias for
> > > > > '>'). Most
> > > > > > likely, you are on a little-endian platform. All of the dtypes
> > > > > in numpy default
> > > > > > to the native-endianness unless specified. If you want to read
> > > > > big-endian data
> > > > > > using numpy, do this:
> > > > > >
> > > > > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')
> > > > > >
> > > > > > If you have any more problems with numpy, please join us on the
> > > > > numpy mailing
> > > > > > list. When reporting problems, please try to provide a small but
> > > > > complete
> > > > > > snippet of self-contained code, the output that you got, and
> > > > > explain the output
> > > > > > that you expected to get. Thank you.
> > > > > >
> > > > > > http://www.scipy.org/Mailing_Lists
> > > > > >
> > > > > > --
> > > > > > Robert Kern
> > > > > >
> > > > > > "I have come to believe that the whole world is an enigma, a
> > > > > harmless enigma
> > > > > > that is made terrible by our own mad attempt to interpret it as
> > > > > though it had
> > > > > > an underlying truth."
> > > > > > -- Umberto Eco
> > > > > >
> > > > > > --
> > > > > > http://mail.python.org/mailman/listinfo/python-list
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > E-mail for the greater good. Join the i?m Initiative from
> > > > > Microsoft.
> > > > >
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>
> > > > >
> > > > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > > E-mail for the greater good. Join the i?m Initiative from 
> Microsoft.
> > > > >
> > > 
> <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> 
>
> > >
> > > > >
> > > > >
> > > 
> ------------------------------------------------------------------------
> > > > >
> > > > > --
> > > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > Keep your kids safer online with Windows Live Family Safety. Help
> > > protect your kids.
> > > 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Keep your kids safer online with Windows Live Family Safety. Help 
> protect your kids. 
> <http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008> 
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From dannywebster at googlemail.com  Fri May  9 11:44:49 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 08:44:49 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
	<2bbcd24b-d36d-47dd-a0fa-4d7333e85fef@a23g2000hsc.googlegroups.com>
Message-ID: <e0b64b5f-5def-4bef-bb4e-f03c364457ea@k10g2000prm.googlegroups.com>

On May 9, 4:09 pm, Paul Hankin <paul.han... at gmail.com> wrote:
> On May 9, 10:10 am, dannywebs... at googlemail.com wrote:
>
> > Hello all,
>
> > I have a dictionary of which i'm itervalues'ing through, and i'll be
> > performing some logic on a particular iteration when a condition is
> > met with trusty .startswith('foo').  I need to grab the previous
> > iteration if this condition is met.  I can do something with an extra
> > var to hold every iteration while iterating, but this is hacky and not
> > elegant.
>
> Often when you're iterating, 'hacky' code can be lifted out into a
> separate generator, keeping the details of the hacks nicely away from
> your code. That's true here...
>
> def iterprevious(seq):
>     """Generate pairs of (previous element, current element)
>     from seq."""
>     last = None
>     for x in iter(seq):
>         yield last, x
>         last = x
>
> Then, when you want use it...
>
> for previous, (key, value) in iterprevious(d.iteritems()):
>     ... In the loop, previous will either be None if we're on the
> first element, otherwise (previous_key, previous_value).
>
> --
> Paul Hankin


Hi all - some good stuff here.  Thanks for the info, I have a few
ideas
to play with.

thanks again

dan.



From ghirai at ghirai.com  Mon May 19 17:45:00 2008
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 20 May 2008 00:45:00 +0300
Subject: Newbie: Keep TCP socket open
In-Reply-To: <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
Message-ID: <20080520004500.25b2f908.ghirai@ghirai.com>

On Mon, 19 May 2008 20:25:57 +0100
"Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks for the feedback.
> 
> Using the socket in a list is great
> 
> However, as i imagined, I now get a limit of around 1500 conns before
> the system crashes out, also i have noticed, that the ports loop back
> to 1025 when they hit 5000.
> 
> Any ideas on how to make the list/socket get to around 50K
> 
> TIA
> 

Try to use scapy to send raw empty packets with S flag set.
Also use Linux/BSD if you're trying this on Windows.

-- 
Regards,
Ghirai.


From kamhung.soh at gmail.com  Sat May 10 21:54:00 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 11 May 2008 11:54:00 +1000
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <op.uayvkafsev04yd@hungvista>

On Sun, 11 May 2008 11:12:37 +1000, globalrev <skanemupp at yahoo.se> wrote:

> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
>     if i%3 == 0 and i%5 != 0:
>         print "Fizz"
>     elif i%5 == 0 and i%3 != 0:
>         print "Buzz"
>     elif i%5 == 0 and i%3 == 0:
>         print "FizzBuzz"
>     else:
>         print i
>
>
> is there a better way than my solution? is mine ok?

Looks OK to me.

A different version, and I test for multiples of 3 and 5 first:

map(lambda x: (not x%3 and not x%5 and "FizzBuzz") or (not x%3 and "Fizz")  
or (not x%5 and "Buzz") or x, xrange(1,101))

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From jeffober at gmail.com  Thu May  1 11:03:24 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 08:03:24 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <c00a0e58-015c-48ef-be02-6c18bcd96b9e@27g2000hsf.googlegroups.com>

If no other threads will be accessing the counter, there will be no
problem.


From aaron.watters at gmail.com  Mon May  5 14:26:46 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Mon, 5 May 2008 11:26:46 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
Message-ID: <43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>

Hi there.  Maybe a little more context would
help us figure out what you want here...

On May 5, 1:28 pm, castiro... at gmail.com wrote:
> Is multimap just a syntax-checked dictionary of mutable sequences?

I think the equivalent of a multimap can be
implemented several different ways, depending on
what you need:

  for
       1 maps to 2,3
       5 maps to 7
  - dictionary mapping to lists
       { 1:[2,3], 5:[7] } # supports unhashable values
  - dictionary mapping to dictionary
       { 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
and dense data
  - dictionary with tuple/pairs as keys
       { (1,2):None, (1,3):None, (4,7):None } # streamlined for
existence testing

If you search usenet (google groups) for multimap
you will find some nice discussions by Alex Martelli and others.

> Is def( a ): a[:]= [x] a trick or part of the language?  It looks
> pretty sharp in variable-width.

You lost me here.

python 2.6:
>>> def (a): a[:]=[x]
  File "<stdin>", line 1
    def (a): a[:]=[x]
        ^
SyntaxError: invalid syntax

All the best.  -- Aaron Watters

===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=gaping+security+hole


From maxerickson at gmail.com  Wed May 28 10:09:08 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 28 May 2008 14:09:08 +0000 (UTC)
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
	<3e473cc60805280440k7156b74cla6342419359441cd@mail.gmail.com>
Message-ID: <Xns9AAC67428BEE1maxericksongmailcom@80.91.229.13>

"Mathieu Prevot" <mathieu.prevot at gmail.com> wrote:

> 2008/5/28 Diez B. Roggisch <deets at nospam.web.de>:
>> Ankit wrote:
>>
>>> Hi everyone,i wanted to build a flash decoder using python can
>>> somebody tell me which library to use and what steps should i
>>> follow to make a flash(video) decoder?By a decoder i mean that
>>> i need to display all the pixel values of each frame.Waiting
>>> for your replies. 
>>
>> Check out libffmpeg. It should be accessible using python by
>> various means, including gstreamer or ctypes.
>>
>> This is however a rather advanced topic.
>>
>> Diez
> 
> I think you might want make an ffmpeg/libffmpeg python wrap. It
> could be really useful, and faster than a pure python decoder.
> Even for fun. 
> 
> Cheers
> Mathieu
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

It even already exists. There is a binary interface that is 
maintained alongside pyglet:

http://code.google.com/p/avbin/

and then ctypes wrapper for that interface in pyglet:

http://code.google.com/p/pyglet/source/browse/trunk/pyglet/media/avb
in.py
http://www.pyglet.org/doc/programming_guide/sound_and_video.html

I haven't used either one, but it's where I would start.


Max



From castironpi at gmail.com  Thu May 15 22:26:39 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:26:39 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com> 
	<76eda66f-0075-41b4-9bd8-404db917a323@k13g2000hse.googlegroups.com>
Message-ID: <11f4f605-b421-4b05-bed9-7d199bdf9d35@59g2000hsb.googlegroups.com>

On May 15, 6:52?pm, afrobeard <afrobe... at gmail.com> wrote:
> l.__delslice__(0,len(l)) is an expression as it returns None which is
> a value
>
> On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
> > On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
> > > The following proposed solution is not intended to be a solution, it
> > > goes completely against the zen of python. [Type import this into the
> > > python command interpreter]
>
> > > I brought it down to two lines:-
>
> > > l = range(6)
> > > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > > itertools would still be a better approach in my opinion.
>
> > > Just because I'm curious to know, can anyone bring it shorter[even if
> > > its cryptic] than this without invoking any Python Library.
>
> > > P.S. Once again I would not recommend using this as Explicit is better
> > > than Implicit
> > > P.P.S. It is strongly undesirable for us humans to use anything
> > > starting with __ :)
>
> > > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > > | It seems that I rather frequently need a list or iterator of the form
> > > > > | [x for x in <> while <>]
>
> > > > > I can think of two ways to interpret that.
> > > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > > >> the expression <B> is false.
>
> > > > def gen(a):
> > > > ? ? for x in a:
> > > > ? ? ? ? if B: break
> > > > ? ? ? ? yield x
>
> > > > a_gen = gen(A)
>
> > > > # now iterate over a_gen
>
> > > > --
> > > > Geoff- Hide quoted text -
>
> > > - Show quoted text -
>
> > In your original, you have:
>
> > > l = range(6)
> > > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > You may be hyperextending the use of '..if..else..', which is one of
> > my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> > an expression.- Hide quoted text -
>
> - Show quoted text -

Functional programming is really important to a former professor of
me.  I like to say that None returns as a value.  I think you can call
functional "evaluational".


From hv at tbz-pariv.de  Fri May  9 08:07:56 2008
From: hv at tbz-pariv.de (Thomas Guettler)
Date: Fri, 09 May 2008 14:07:56 +0200
Subject: xml.etree Syntax of path?
In-Reply-To: <4824211C.8040409@behnel.de>
References: <68ij33F2tl90fU1@mid.individual.net> <4824211C.8040409@behnel.de>
Message-ID: <68it4sF2sh11cU1@mid.individual.net>

Stefan Behnel schrieb:
> Thomas Guettler wrote:
>> I think the documentation of xml.etree is missing something[1].
>>
>> {{{
>> find(path)
>>     Finds the first toplevel element with given tag. Same as
>> getroot().find(path). path is the element to look for.
>> }}}
>>
>> According to the source etree has limited support for xpath. I think it
>> should be documented what 'path' should look like to.
> 
> You mean like this?
> 
> http://effbot.org/zone/element-xpath.htm

Yes, since etree is part of the standard library, the documentation
should be there, too. Or at least a link should be provided.

  Thomas

-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de


From basti.wiesner at gmx.net  Sat May 31 05:58:02 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 31 May 2008 11:58:02 +0200
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
	<g1p3np$pvf$01$1@news.t-online.com>
	<mailman.1785.1212188702.12834.python-list@python.org>
Message-ID: <g1r7fb$h8r$03$1@news.t-online.com>

[ Kris Kennaway <kris at FreeBSD.org> ]

> Sebastian 'lunar' Wiesner wrote:
>> 
>> Illustrates, how to use socket credentials without sendmsg/recvmsg and so
>> without any need for patching.
>>  
> Thanks to both you and Paul for your suggestions.  For the record, the
> URL above is linux-specific, 

D'oh, sorry, I didn't know this ... I'm not a unix expert, I just remembered
that article when reading your question ;)


-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From radim.marek at gmail.com  Wed May  7 07:00:08 2008
From: radim.marek at gmail.com (radim.marek at gmail.com)
Date: Wed, 7 May 2008 04:00:08 -0700 (PDT)
Subject: FreeBSD KeyboardInterrupt not captured
Message-ID: <96da774d-2746-4c5e-9947-e36860dd7461@p39g2000prm.googlegroups.com>

Hi Guys,

during testing of my project on FreeBSD I've discovered stange
'feature' of time.sleep(). It works if single thread is running, but
when multi-threaded, the SIGINT signal seems not to be handled in same
way.

I've found three discussion about similar behavior with os.system()
but so far none of the suggested patches worked.

I've limited test to following code:

import time
import sys
import threading

class MyThread(threading.Thread):
        def __init__(self):
                super(MyThread, self).__init__()
                self.start()

        def run(self):
                while True:
                        try:
                                time.sleep(10)
                        except KeyboardInterrupt:
                                print 'thread keyboard interrupt'

def main():
        my = MyThread()

        while True:
                try:
                        time.sleep(5)
                except KeyboardInterrupt:
                        print 'got it'

if __name__ == '__main__':
        main()


Any suggestions?

Best regards,

Radim


From ganbusiness at gmail.com  Fri May 23 05:47:38 2008
From: ganbusiness at gmail.com (dasasdfd)
Date: Fri, 23 May 2008 02:47:38 -0700 (PDT)
Subject: online money earnings
Message-ID: <c4ccc239-89be-48ca-ba6c-45cbdbbe943a@l17g2000pri.googlegroups.com>

online money earnings
value of money
money is the life
http://moneylife0123.blogspot.com/


From mail at timgolden.me.uk  Wed May  7 05:45:36 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 07 May 2008 10:45:36 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <48216129.5090405@timgolden.me.uk>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>	<mailman.653.1210080581.12834.python-list@python.org>	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
Message-ID: <48217A40.5080808@timgolden.me.uk>

In a spirit of being helpful... :)

The code below (which I imagine every Windows programmer writes
sometime in their Python life) mimics the os.walk functionality, yielding
the key, subkeys, and values under a particular starting point in the
registry. The "if __name__ == '__main__'" test run at the bottom does
more-or-less what you were asking for originally, I think, converting
some name to some other name wherever it appears.

<module regwalk.py>
import _winreg

HIVES = {
  "HKEY_LOCAL_MACHINE" : _winreg.HKEY_LOCAL_MACHINE,
  "HKEY_CURRENT_USER" : _winreg.HKEY_CURRENT_USER,
  "HKEY_CLASSES_ROOT" : _winreg.HKEY_CLASSES_ROOT,
  "HKEY_USERS" : _winreg.HKEY_USERS,
  "HKEY_CURRENT_CONFIG" : _winreg.HKEY_CURRENT_CONFIG
}

class RegKey:
  
  def __init__ (self, name, key):
     self.name = name
     self.key = key
  
  def __str__ (self):
    return self.name

def walk (top):
  """walk the registry starting from the key represented by
  top in the form HIVE\\key\\subkey\\..\\subkey and generating
  key, subkey_names, values at each level.
  
  key is a lightly wrapped registry key, including the name
  and the HKEY object.
  subkey_names are simply names of the subkeys of that key
  values are 3-tuples containing (name, data, data-type).
  See the documentation for _winreg.EnumValue for more details.
  """
  if "\\" not in top: top += "\\"
  root, subkey = top.split ("\\", 1)
  key = _winreg.OpenKey (HIVES[root], subkey, 0, _winreg.KEY_READ | _winreg.KEY_SET_VALUE)
  
  subkeys = []
  i = 0
  while True:
    try:
      subkeys.append (_winreg.EnumKey (key, i))
      i += 1
    except EnvironmentError:
      break
  
  values = []
  i = 0
  while True:
    try:
      values.append (_winreg.EnumValue (key, i))
      i += 1
    except EnvironmentError:
      break

  yield RegKey (top, key), subkeys, values
  
  for subkey in subkeys:
    for result in walk (top + "\\" + subkey):
      yield result
  
if __name__ == '__main__':
  for key, subkey_names, values in walk ("HKEY_LOCAL_MACHINE\\Software\\Python"):
    print key
    for (name, data, type) in values:
      print "  ", name, "=>", data
      if type == _winreg.REG_SZ and "TJG" in data:
        _winreg.SetValueEx (key.key, name, 0, type, data.replace ("TJG", "XYZ"))

</module regwalk.py>

TJG


From kyosohma at gmail.com  Fri May  2 14:52:30 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 11:52:30 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
	<c08e6c76-dda5-457f-be0c-00ea9c294d13@r66g2000hsg.googlegroups.com> 
	<NNWdnYhfc8_sxobVnZ2dnUVZ_gednZ2d@comcast.com>
Message-ID: <6ca74a29-1121-4b53-abb9-6bcecf33272a@m3g2000hsc.googlegroups.com>

On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
> Mike Driscoll wrote:
> > On Apr 29, 8:56 am, TkNeo <tarun.... at gmail.com> wrote:
> >> I need to do SSL file transfer using python? Is there a library i can
> >> use ?
>
> >http://sandbox.rulemaker.net/ngps/m2/
>
> M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> --
>   Heikki Toivonen

Whoops...I just went with the first link Google gave me. The link I
gave doesn't mention that the project has moved. Looks like the one
you link to is the 9th link on my Google search using the terms:
"python m2crypto".

Sorry if I spread misinformation though.

Mike


From vivainio at gmail.com  Tue May  6 13:22:42 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Tue, 06 May 2008 17:22:42 GMT
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
Message-ID: <8763tr5ov1.fsf@gmail.com>


Excuse the long post.

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>> I guess it's safe to assume that you are not opposed to using code
>> based on more liberal license, right? :-)
>
> I'm less inclined to base work on, or contribute to, a work under a
> non-copyleft license, because I have less assurance that the code will
> remain free for all recipients.

In practice, the probability of hijacking of source code by an evil
corporation is very low for most projects. And even when it did
happen, the evil corporation would likely submit patches. The more
users an open source project has, the better.

Also, you can do what Paul Boddie did - fork the project, or maintain
patches that are under LGPL. With a liberal license, you have that 
privilege.

> There's no single free-software license that won't displease some
> segment of the free-software community. I think the Vellum project

I don't think BSD/MIT like license really annoys anyone. Think python
here ;-)

I'm also answering some points by Zed here (assuming they were meant
for mailing list):

>  Well, I'm also telling people that it's like the GNU toolchain in that
>  using it doesn't mean your stuff is GPLed.  Just if you import it as
>  a library or write commands for it that you release.

I realize this - there is a difference here between tools that you run
and tools that you link to / import. However, Vellum could be in the
middle ground, since the commands you create do link with Vellum.

>  Ok, so for you it's a religious thing more than a technical capability
>  or limitation thing?  Does that mean you use a BSD alternative for
>  everything GNU, like GCC as well?

Not at all, it's a very practical thing related to all the
intellectual property lawyerage in corporate setting. With Vellum, it
doesn't matter a lot because most of the tools are only used in-house,
but it would still be nice if you could just grab the code from
somewhere without having to think about license at all, or considering
whether any of this would ever be needed for something that involves
selling stuff under proprietary license.

To stay on topic of Vellum, let's consider the scenario where someone
digged Vellum's syntax, and would like to use the parser in a
proprietary app - or create commands that include proprietary stuff
(it's not the developer's call, but the corporate policy). Vellum
parser would be only a small component in the whole system. Would you
rather make the developer:

- Find some other, inferior parser with more liberal license or
reimplement Vellum syntax from spec (typical "nah, this is gpl, I
can't use this, continue with the next google hit" scenario)

- Just grab the Vellum implementation and use it without concern or
management discussions, yielding yet another developer that saved some
time, had more coffee breaks and possibly hit the deadline early,
recommending Vellum code to his colleagues as a good starting point to
whatever they are doing, and perhaps contributing some code or ideas
back?

Note that this applies mostly to small tools / libs. Big projects like
Linux kernel, Gnome or KDE have to be seriously concerned about
malicious use of their intellectual property, but a small open source
tool is more likely to be (initially) picked up by an individual
developer who thinks something is cool; and it will never be the
money-making part of the product.

Also, for some reason, GPL is used for evil (dual-licensing schemes -
make money but still gain the open source mindshare, and possibly rack
up free contributions to something that is your *commercial product*)
more often than it's used for good (gcc, Linux kernel - prevent IP
exploitation and ensure that all improvements are freely accessible).

I must say that if I implemented something I want to make money on at
some point, I would license it under GPL. If I'm just scratching my
own itch, having fun or racking up open source feelgood karma, I would
use MIT (or BSD, as we are doing w/ IPython). So I'm not opposed to
GPL - just saying that it's not often the choice that will net you the
most users.


From goldnery at gmail.com  Mon May 26 15:06:02 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 12:06:02 -0700 (PDT)
Subject: Keyboard Events
Message-ID: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>

I use WX on windows XP and I try to generate an event when the user is
clicking the keyboard while the application frame is not in focus.
All I manged to do were while the application frame is in focus
Can someone please show me how to do it?

Thanks !


From castironpi at gmail.com  Tue May 13 20:32:24 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 17:32:24 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
Message-ID: <fb7637a8-886b-4218-8314-5bbb78f8e3f3@a1g2000hsb.googlegroups.com>

On May 13, 2:41?pm, "inhahe" <inh... at gmail.com> wrote:
> "George Sakkis" <george.sak... at gmail.com> wrote in message
>
> news:0563506d-bd36-404d-8961-4c4c5d1cc029 at t54g2000hsg.googlegroups.com...
>
> > On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:
>
> >> Any programming that helps you solve a problem is fun and
> >> recreational. At least, that's how I look at it. I suppose it really
> >> depends on why you're doing it, what your objective is, etc. But I'd
> >> say, why not?
>
> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > you can safely ignore its posts.
>
> How does it generate text?

This is a Python newsgroup, so I can post my own code.  (Which makes
Python a layer of standardization.)  However it's long.  Did you want
any modules in particular, or shall I just start the top?


From skanemupp at yahoo.se  Fri May 16 09:11:55 2008
From: skanemupp at yahoo.se (globalrev)
Date: Fri, 16 May 2008 06:11:55 -0700 (PDT)
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
Message-ID: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>

On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> globalrev a ?crit :
>
> > wassup here?
>
> > 7
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > <module>
> >     print cust1.getID()
> > AttributeError: 'NoneType' object has no attribute 'getID'
>
> > class customer:
>
> 1/ naming convention : class names should be CamelCased
> 2/ unless you need compatibility with years old Python versions, use
> newstyle classes
>
> class Customer(object):
>
> >     def __init__(self, ID, movies):
> >         self.ID = ID
> >         self.movies = movies
>
> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>
>      def __init__(self, id, movies):
>          self.id = id
>          self.movies = movies
>
> >     def getID():
> >         return self.ID
>
> >     def getMovies():
> >         return self.movies
>
> 4/ Python has support for computed attributes, so you just don't need
> these getters.
>
>
>
> > import os
> > import customer
> > import movie
>
> > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > mv1str = mv1.read()
>
> > print mv1str.count(',5,')
>
> > cust1 = customer.__init__('12',['1','435','2332'])
>
> __init__ is automagically called on instanciation, so you don't have to
> call it yourself. And FWIW, your __init__ returns None.
>
> cust1 = Customer('12', ['1', '435', '2332'])
>
> > print cust1.getID()
>
> print cust1.id

print "cust", cust1.idnbr, cust1.movies()

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
<module>
    print "cust", cust1.idnbr, cust1.movies()
TypeError: 'list' object is not callable

when class =
class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies

print "cust", cust1.idnbr, cust1.movies()

Traceback (most recent call last):
  File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
<module>
    print "cust", cust1.idnbr, cust1.movies()
TypeError: 'list' object is not callable

when class =
class customer:
    def __init__(self, idnbr, movies):
        self.idnbr = idnbr
        self.movies = movies



From tommy.nordgren at comhem.se  Sun May 18 14:49:59 2008
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sun, 18 May 2008 20:49:59 +0200
Subject: Get all the instances of one class
In-Reply-To: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
Message-ID: <2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>


On 17 maj 2008, at 01.44, Terry wrote:

> Hi,
>
> Is there a simple way to get all the instances of one class? I mean
> without any additional change to the class.
>
> br, Terry
> --
> http://mail.python.org/mailman/listinfo/python-list


class MyClass : a_base_class
       memberlist=[]

#  Insert object in memberlist when created;
#  note: objects won't be garbage collected until removed from  
memberlist.
-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
tommy.nordgren at comhem.se






From notbob at nothome.com  Sat May 10 15:25:56 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 19:25:56 GMT
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
Message-ID: <8FmVj.567$PE5.322@fe087.usenetserver.com>

On 2008-05-10, notbob <notbob at nothome.com> wrote:

> BTW, anyone know a better cli news client/editor combo than slrn/jed (don't
> even think vi!)?  When I cp/past code (or most anything else) to jed, all
> the lines become stair-stepped.  This is no biggie for a most stuff, but for
> idented code, it's unacceptable.  

Whoo-hoo!  I just got emacs config'd to do python.  Let's see how that works.

nb


From vivainio at gmail.com  Sun May 25 04:47:01 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Sun, 25 May 2008 08:47:01 GMT
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
Message-ID: <87tzgm3h4q.fsf@gmail.com>

Fuzzyman <fuzzyman at gmail.com> writes:


>> Perhaps a lint-like validation tool would be optimal for this
>> problem...
>
> So we can refuse to execute their code if they use private APIs?

No, but it could complain and point out the exact offending lines,
pointing their development effort to right direction.

> Proxying so that we can really hide our internal APIs is a better
> solution.

How about pyprotocols and other interface packages?

Proxying is pretty workable too, and it easily makes sense that the
official API objects should be different from the logic executing
objects.


From castironpi at gmail.com  Wed May 14 19:41:27 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:41:27 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<mailman.1130.1210789334.12834.python-list@python.org>
	<d609d636-7dd3-43df-810b-7188560842ba@d1g2000hsg.googlegroups.com>
Message-ID: <78f31576-0e45-4e62-ae71-cd366b010715@59g2000hsb.googlegroups.com>

On May 14, 6:28?pm, castiro... at gmail.com wrote:
> On May 14, 1:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
>
> > On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwe... at gmail.com> wrote:
> > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> > >> "George Sakkis" <george.sak... at gmail.com> wrote in message
> > >> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > >> > you can safely ignore its posts.
>
> > >> How does it generate text?
>
> > > My guess is by inhaling a lot of intoxicants.
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> > I assumed his message with the subject "bytes1.shuffle()" from a few
> > days ago was a glimpse into his source code. ?Or something like it.
>
> I am trying to select a color. ?It's color select.py. ?Any thoughts?

I was trying to select a font.  It was font select.py.  Why did I say
color?


From wizzardx at gmail.com  Sun May  4 18:36:37 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 00:36:37 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
Message-ID: <18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>

> >
> Thank you very much for your comprehensive answer and detailed informations,
> David; I really appreciate it!

You're welcome.

>
> As for the number of items, there would be approx. 34 000 calls of execute()
> in my present code, in the final version probably more; I think executmany
> is more efficient here, if there aren't any drawbacks.

executemany is probably a good idea here. If memory becomes a problem
at some point (eg: millions of lines) you'll probably want to use an
on-disk database (I suggest postgresql), and read in batches of say
1000, which you save to the database with a single executemany.

>  I thought a database would perform much better in such cases (and the
> preliminary tests confirm this);

It sounds like your Python code has some serious (algorithm or data
structure) problems. Python code (with appropriate dictionaries,
caches, memoization etc) should always be able to perform better than
an in-memory SQL database (even optimized with indexes, etc). You
definitely need to check that. You don't even create any db indexes
(in the code you gave), but sqllite still performs better than your
structs which do use dicts!

Basically what you're saying is that (the equivalent, but with SQL
overhead) of a set of lists containing tuples, iwthout any dicts for
lookup, performs better than your original sructure.

Unless you actually need a database (too much data for memory, or you
need persistant data, possibly for sharing between apps) I suggest
sticking to Python structures, and optimizing your structures and
look-up algorithms.

One reasonable reason for you to use a database would be if
maintaining your dicts (for fast lookup) became too complicated and
you wanted the DBM to keep indexes automatically updated for you.

> however now I see the possible risks too.
> I'll look into other possible approaches. There will be clearly a finite set
> of the column names, hence it is possible to define the db at the beginning
> and fill it with values only after parsing the texts; the problem is, this
> can't be done untill the texts are available, I just thought, a more generic
> approach would be be more easily extensible and also a bit simpler.

If you don't know in advance what the fields are, then how does your
python app work? Are all queries in the user interface (that refer to
this database) all arbitrary and initiated by a human?

Also, how do you setup foreign relationships between tables, and
indexes (for performance), if you don't know what fields are going to
be present?

Maybe this would be more clear (to me) if you gave a short example of
the data, with a note or two to explain where there are performance
problems.

> the parsing the text to get the tags with their values are done in the
> program itself

What kind of tags? From your description it sounds like you have
markers inside the text (basically bookmarks with arbitrary metadata,
hence your need for dynamic schema), which the user can query, so they
can quickly jump between parts of the text, based on their search
results. Is this about right?

> Just for information, what are valid table and column names in sqlite?
> (Unfortunately, I couldn't find any reference for that (maybe except the
> reserved sqlite_master);  as quoted names, everything I tried, worked fine,
> also whitespace, various unicode characters etc.; of course, I can imagine,

I'm not sure about that.

If you want to be safe:

1) Add a prefix to your table and field names
2) 'normalise' all table and field names (eg: convert to lower case,
remove non-alphabetic characters, etc).
3) Make sure that you don't get the same 'normalised' name for 2
different incoming strings.
4) Be prepared to scrap the schema-generating approach if your app's
database requirements change (eg: you need to share the db with other
apps which have their own tables that you don't want to stomp over).

David.


From foul_ole_ron1 at yahoo.com  Fri May 23 03:12:35 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 00:12:35 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
Message-ID: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>

Hello all,

I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
error trying to do operations on a string list after importing numpy.
Minimal example:

[start Python]

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>> a=['1','2','3']
>>> all(a)
True
>>> from numpy import *
>>> all(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
982, in all
    return _wrapit(a, 'all', axis, out)
  File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
37, in _wrapit
    result = getattr(asarray(obj),method)(*args, **kwds)
TypeError: cannot perform reduce with flexible type

[end of example]

It seems that Python calls numpy's "all" instead of the standard one,
is that right? If so, how can I call the standard "all" after the
numpy import? ["import numpy" is not a desirable option, I use a lot
of math in my progs]

Is there another way around this error?

Marc


From deets at nospam.web.de  Mon May 12 10:34:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 May 2008 16:34:39 +0200
Subject: frameword vs application server?
In-Reply-To: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
References: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
Message-ID: <68r2sbF2tjrl5U1@mid.uni-berlin.de>

walterbyrd schrieb:
> Can somebody help me understand the difference? Not just where Python
> is concerned, but in general?
> 
> As I understand it, an application server is supposed to be a great
> help in developing apps, because most of the business logic is already
> there. It seems to me that, usually when applications servers are
> discussed, people are talking about Java.

First of all, this is a misconception. An app-server may provide a wide 
range of infrastructure, however this has nothing to do with business 
logic. THat can merely pick parts of that infrastructure to build upon. 
But the distinction to a powerful framework is slim enough.

And it should be (and has been often so) said that especially in the 
java-world, app-servers and the specifications the implement (j2ee) are 
over-engineered and complicated.

> I suppose most popular Python frameworks incorporate an application
> server, but I get the idea that those app servers are not nearly as
> sophisticed as something like JBoss.

The sophistication is a matter of perspective - some of it stems from 
the fact that in java, you need a lot more code to make even pretty 
simple things work. Think of delegation to business objects (session 
beans) that get their respective calls wrapped so that they take place 
inside a transactional context.

Which involves a great deal of design-abstractions, code-generators and 
tons of XML to glue these together.

Or three lines of code in python...


> I am not sure if a Python app server, that works like a Java app
> server would make sense.

As mentioned above - in some aspects, that is not really needed. But if 
you want more of an app-server, have a look at ZOPE, Kamaelia and maybe 
even twisted.

Diez


From george.sakkis at gmail.com  Wed May  7 10:05:31 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 07:05:31 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de> 
	<fvsbgf$mev$1@aioe.org>
Message-ID: <1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>

On May 7, 9:40?am, pistacchio <pistacc... at gmail.com> wrote:

> Diez B. Roggisch ha scritto:
>
>
>
> > pistacchio wrote:
>
> >> Mike Driscoll ha scritto:
> >>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
> >>>> hi! i'm a php user and a python programmer. i'd love to use python for
> >>>> my server side needs but i can't seem to find what i'm looking for. for
> >>>> most of my php work i use mysql and tinyButStrong
> >>>> (http://www.tinybutstrong.com) which is a very lightweight template
> >>>> engine that offers powerful functionalities. you insert TBS tags in web
> >>>> pages like:
>
> >>>> <div align="center" class="title-page"> [var.x] </div>
>
> >>>> and it replaces [var.x] with the value of global variable x. it also
> >>>> makes blocks (and nested blocks) easy to implement:
>
> >>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
> >>>> [blk1;block=end] </p>
>
> >>>> in the previous code it cycles throu all the values of the array blk1.
>
> >>>> it does many more things, like htlm escaping, url and js encoding etc,
> >>>> conditional displaying etc, but it is not more confusing that inserting
> >>>> pieces of code into the HTML (aka: littering the code and kissing
> >>>> goodbye to the code/presentation separation). it comes in the form of a
> >>>> single file with a single class that you can easily include in the code
> >>>> and go.
>
> >>>> now, i've searched the net and it seems full of python-based frameworks
> >>>> for doing server side scripting and templating, but none that suits my
> >>>> needs.
>
> >>>> ? ? 1. i like writing code and i like control. i mean, open up the
> >>>> simplest text editor and write in it. i don't want something that is
> >>>> command-line driven or that writes code for me like ">>>
> >>>> makePagesFromThisDatabase()".
> >>>> ? ? 2. i want something very lightweight. i don't want dozen of options,
> >>>> pre-made blogging parts ecc. i just need a good non invasive template
> >>>> engine and the basic functions for server side scripting, like session
> >>>> managing, request parsing, functions to manipulate html code (encodings
> >>>> etc)
> >>>> ? ? 3. i don't want to beg my hosting provider to install the libraries.
> >>>> a simple include file should do the work.
> >>>> ? ? 4. object oriented programming is not required (better: i prefer
> >>>> plain old procedural programming).
>
> >>>> any help? thanks in advance
> >> hi, thanks for replaying
>
> >>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
> >>> and Genshi in 2.x (I think) for templating purposes. There's also
> >>> Cheetah, one of the more powerful Python templating engines out there.
>
> >> django is exacly the kind of giant i'm trying to avoid
>
> >>>http://genshi.edgewall.org/
> >> the first lines of the tutorial read:
> >> "First, make sure you have CherryPy 3.0.x installed"
> >> Now, cherrypy is something that is not properly "include a file and get
> >> going!"
> >>>http://www.kid-templating.org/
> >> kid seems to have a non-linear approach, but i may give it a try
>
> >>>http://www.cheetahtemplate.org/
> >> cheetah was something that i already considered using. have i to
> >> "install" it or can i just import it?
>
> > You will need to install any of these. It is part of how python is designed.
> > Extendability comes with a price-tag.
>
> well, the problema is exacly that i'm looking for a python module, not
> for a python library.

What does it matter if it's a single file or a dozen under a package ?
"Installation" for pure Python packages can be as simple as copying
the package under any directory in your PYTHONPATH.

Check out Mako (http://www.makotemplates.org/), it's pretty powerful
and fast.

George


From danb_83 at yahoo.com  Mon May 26 22:51:48 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Mon, 26 May 2008 19:51:48 -0700 (PDT)
Subject: sort list doesnt work, key=str still doesnt work
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <b5bf2f79-5f6e-44c0-9ecb-d91204ee7c64@e53g2000hsa.googlegroups.com>

On May 26, 9:46?pm, notnorweg... at yahoo.se wrote:
> >>> x
>
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
> >>> x
>
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>
>
>
> what do i need to do?

x.sort(key=str.upper)


From jeffober at gmail.com  Fri May  2 15:49:53 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:49:53 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
Message-ID: <6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>

The generally used idiom for that is:

lst = ['a', 'b', 'c']
if 'a' in lst:
  foo = lst.index('a')


From wxPythoner at gmail.com  Tue May 13 05:34:03 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 02:34:03 -0700 (PDT)
Subject: Some comparison operators gone in Python 3.0?
Message-ID: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>

Is that true that this comparison operators are gone in Python 3.0:

<    (is less than)
>    (is greater than)
<= (is less than or equals)
>= (is greater than or equals)

Is it true?


From neokosmos at gmail.com  Tue May 13 11:28:00 2008
From: neokosmos at gmail.com (Paul Miller)
Date: Tue, 13 May 2008 08:28:00 -0700 (PDT)
Subject: Literate programs in Python
Message-ID: <37e8fb41-8008-45aa-a123-b71455bc7ce5@t54g2000hsg.googlegroups.com>

Does anyone know of any (preferably largish) examples of literate
programs written using Python?  Alternatively, does anyone know of any
literate programming tools which support Python well?  (I am aware of
Leo and I've been to literateprogramming.com, but any additional
pointers would be much appreciated!)

Thanks,

Paul


From hniksic at xemacs.org  Wed May 14 10:56:55 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 14 May 2008 16:56:55 +0200
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>
	<mailman.1091.1210724293.12834.python-list@python.org>
	<87r6c5s71g.fsf@mulj.homelinux.net>
	<mailman.1118.1210772196.12834.python-list@python.org>
Message-ID: <87mymt7x3c.fsf@mulj.homelinux.net>

"Ian Kelly" <ian.g.kelly at gmail.com> writes:

> On Wed, May 14, 2008 at 1:01 AM, Hrvoje Niksic <hniksic at xemacs.org> wrote:
>>  Have you tried it?  __len__ is in fact marginally slower because it
>>  involves a dict lookup, whereas the built-in len() knows how to cheat
>>  and invoke __len__ through a slot in the C type struct very
>>  efficiently.
>>
>>  $ python -m timeit -s 'l=[1, 2, 3]' 'len(l)'
>>  1000000 loops, best of 3: 0.24 usec per loop
>>  $ python -m timeit -s 'l=[1, 2, 3]' 'l.__len__()'
>>  1000000 loops, best of 3: 0.347 usec per loop
>
> For built-in types, sure.

Well, he did ask about list.  :-)

> For user-defined types in Python, it's the other way around:

Yes, in that case the C slot contains a generic wrapper that still has
to locate and call the Python function, which ends up being slower.
The point is that such microoptimizations rarely make a difference,
and even then the difference can be counterintuitive, as in the list
example.


From gagsl-py2 at yahoo.com.ar  Mon May 26 12:18:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 13:18:56 -0300
Subject: IOError in windows service
References: <483A85C6.20803@gmail.com>
Message-ID: <op.ubrrlujtx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 06:41:26 -0300, Aspersieman <aspersieman at gmail.com> escribi?:

> I have a script (attached) that creates a windows service. Basically the
> service periodically runs a program 'program.exe'. This all works fine,
> but during testing I discovered that if I include any 'print' statements
> (used to debug the service when its run in 'debug' mode), when _not_ in
> debug mode, it throws an error:
>
> <error>
> The instance's SvcRun() method failed
>   File "C:\Python25\Lib\site-packages\win32\lib\win32serviceutil.py",
> line 785, in SvcRun
>     self.SvcDoRun()
>   File "C:\Program Files\Program\MyService.py", line 28, in SvcDoRun
>     print "Entering while loop..."
> <type 'exceptions.IOError'>: (9, 'Bad file descriptor')
> </error>
>
> I have removed the 'print' statements, after which the service runs
> fine, but was just curious to find out the reason for this error.

Usually services don't have a console attached so sys.stdout is invalid. Just don't print anything...

-- 
Gabriel Genellina



From pistacchio at gmail.com  Mon May 12 05:11:27 2008
From: pistacchio at gmail.com (pistacchio)
Date: Mon, 12 May 2008 02:11:27 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
	<cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com> 
	<a65251a2-5b97-49f5-9256-c85b1ded4cc7@c58g2000hsc.googlegroups.com> 
	<VuTVj.40306$o06.27577@tornado.fastwebnet.it>
Message-ID: <9af51496-5840-4f53-ae71-0d9c0da6c2f4@34g2000hsh.googlegroups.com>

On 12 Mag, 10:47, Marco Mariani <ma... at sferacarta.com> wrote:
> pistacchio wrote:
> > On 12 Mag, 10:01, alex23 <wuwe... at gmail.com> wrote:
> >> On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
>
> >>> hi to all!
> >>> can i load a module passing to it, automatically and as default, all
> >>> the caller's global variables to act as module's global variables?
>
> Are you positively sure you need this?
>
> Modifying imported modules is already quite fragile, but this.. it's
> basically a reversed(import *)
>
> It's quite messy. Where quite equals to "very"

well, i'm writing a module called pycatrix. within the module i have
compile / exec statements in a functions that work on global
variables. ( exec compiledTemplate in globals() ).

now, i don't want to be forced (or force the end user) to import to
call the module's function with a compulsory "globals()" as argument.


From arnodel at googlemail.com  Sat May 24 11:26:55 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 24 May 2008 16:26:55 +0100
Subject: raising an exception when multiple inheritance involves same base
References: <mailman.1529.1211637967.12834.python-list@python.org>
Message-ID: <m21w3r7mf4.fsf@googlemail.com>

Michael Hines <michael.hines at yale.edu> writes:

> Hello,
> I have a class factory that supports single inheritance but it is
> an error if the base appears twice. e.g
> class Foo(hclass(h.Vector), hclass(h.List)):
> should raise an exception since h.Vector and h.List are really the same
> extension class, HocObject.
>
> So far I have only been able to do this by iterating over __mro__ during
> creation of an object as in:
>
> def hclass(c):
>     class hc(hoc.HocObject):
>         def __new__(cls, *args, **kwds):
>             m = False
>             for x in cls.__mro__:
>                 if (type(x) == type(hc)):
>                     if m == True:
>                         raise HocError, 'Multiple inheritance...'
>                     m = True
>             kwds.update({'hocbase':cls.htype})
>             return hoc.HocObject.__new__(cls, *args, **kwds)
>     setattr(hc, 'htype', c)
>     return hc
>
> Is there a way to do the test earlier (e.g during creation of the Foo
> class when hclass is called the second time
> instead of during creation of a Foo object).

Yes, by giving hoc.HocObject a custom metaclass:

class MetaHocObject(type):
    def __new__(cls, name, bases, attrs):
        if len(bases) > 1:
            raise Exception("Only single inheritance allowed")
        return type.__new__(cls, name, bases, attrs)

class HocObject(object):
    __metaclass__ = MetaHocObject


That'll forbid descendants of MetaHocObject having several bases:

>> class A(HocObject): pass
... 
>>> class B(HocObject): pass
... 
>>> class C(A, B): pass
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 4, in __new__
Exception: Only single inheritance allowed
>>> 

HTH

-- 
Arnaud


From phd at phd.pp.ru  Fri May 30 09:10:25 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Fri, 30 May 2008 17:10:25 +0400
Subject: SQLObject 0.9.7
Message-ID: <20080530131025.GE32657@phd.pp.ru>

Hello!

I'm pleased to announce version 0.9.7, a minor bug fix release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.9.7

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.9.6
----------------

Small Features
~~~~~~~~~~~~~~

* Use VARCHAR(MAX) and VARBINARY(MAX) for MSSQL >= 9.0.

* Run post_funcs after RowDestroySignal.

Bug Fixes
~~~~~~~~~

* Fixed a minor bug in Set column.

* A bug fixed for RowCreatedSignal together with InheritableSQLObject:
  run post_funcs after the entire hierarchy has been created.

* Aggregate functions now honors 'distinct'.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From goldnery at gmail.com  Fri May 30 10:49:53 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 30 May 2008 07:49:53 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
Message-ID: <d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>

On May 30, 3:43 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Gandalf wrote:
> > I have script which being triggered by pressing CTRL+Right mouse click
> > from any place in my O.P , Now I need to generate automatically event
> > like copy my selected item or double clicking the right mouse cursor
> > without user interfering.
> > how can i implement this width python?
>
> > thanks!
>
> You didn't tell us enough to answer your question.  What GUI are you
> using?  Nearly every one of them that I'm aware of allow you to register
> handlers for such events.
>
> -Larry
windows xp


From torriem at gmail.com  Thu May  8 19:04:26 2008
From: torriem at gmail.com (Michael Torrie)
Date: Thu, 08 May 2008 17:04:26 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
Message-ID: <482386FA.10700@gmail.com>

wxPythoner at gmail.com wrote:
> Have a look at this:
> 
>>>> -123**0
> -1
> 
> 
> The result is not correct, because every number (positive or negative)
> raised to the power of 0 is ALWAYS 1 (a positive number 1 that is).

No python is correct.  you're expression parses this way, when converted
to a lisp-ish prefix expression:

(- (123 ** 0 ))

All calculators work this way, so I don't know why you are expecting
anything otherwise.

> 
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.
> 
> I suggest making the Python parser omit the negative sign if a
> negative number is raised to the power of 0. That way the result will
> always be a positive 1, which is the mathematically correct result.
> 
> This is a rare case when the parser is fooled, but it must be fixed in
> order to produce the correct mathematical result.
> --
> http://mail.python.org/mailman/listinfo/python-list



From eliben at gmail.com  Thu May 29 15:07:48 2008
From: eliben at gmail.com (eliben)
Date: Thu, 29 May 2008 12:07:48 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
	<d5f3147d-ce9c-4dc9-a36c-508f22f85254@l64g2000hse.googlegroups.com>
Message-ID: <38b7df61-b1ca-4cd9-b838-3431a70cff87@d1g2000hsg.googlegroups.com>

On May 29, 3:08 am, Matimus <mccre... at gmail.com> wrote:
> > I have a game class, and the game has a state. Seeing that Python has
> > no enumeration type, at first I used strings to represent states:
> > "paused", "running", etc. But such a representation has many
> > negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
>
> I frequently use strings in place of enumeration in python. I have
> found it to be very useful. I'm curious about the _many negatives_ you
> have found?
>
> For example, I wrote a module and one of the parameters to a function
> was `mode`. Two of the modes were ALL_MODE and ONE_MODE.
>
> At first I enumerated the modes:
>
> MODES = ALL_MODE, ONE_MODE = 0, 1
>
> And code using the mode tended to look something like this:
>
> from package import module
> module.foo(mode=module.ALL_MODE)
>
> Of course, the following would also work, but isn't self descriptive:
>
> module.foo(mode=0)
>
> Then, after some user feedback I changed it to this:
>
> MODES = ALL_MODE, ONE_MODE = "all one".split()
>
> This maintained backwards compatabilty, but users could use the much
> more concise (but still readable) version:
>
> module.foo(mode="all")
>
> Since then, I have adopted using strings in place of enum types as a
> best practice.
>
> Matt

The problem with naming strings explicitly has to do with type safety.
If you make a mistake in a parameter's name, it won't be detected by
the interpreter and you can run into weird errors later. The other
problem is that all the possible options are not documented in one
convenient place, but you solved it by using a mixed approach of
uppercase "constants" having the values of strings.

Eli


From ivan.illarionov at gmail.com  Wed May  7 17:46:38 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 21:46:38 +0000 (UTC)
Subject: howto print binary number
References: <e7811a33-0f74-41f7-87d2-d7d4ca01ea0e@y38g2000hsy.googlegroups.com>
Message-ID: <fvt7vt$3pd$1@news.mtu.ru>

On Wed, 07 May 2008 13:13:40 -0700, dmitrey wrote:

> hi all,
> could you inform how to print binary number? I.e. something like
> 
> print '%b' % my_number
> 
> it would be nice would it print exactly 8 binary digits (0-1, with
> possible start from 0)
> 
> Thank you in advance, D

Here it is:

def bin(x, digits=0):
    oct2bin = ['000','001','010','011','100','101','110','111']
    binstring = [oct2bin[int(n)] for n in oct(x)]
    return ''.join(binstring).lstrip('0').zfill(digits)

>>> bin(5)
'101'
>>> bin(0x0FFF, 16)
'0000111111111111'
>>> bin(5, 8)
'00000101'

-- 
Ivan


From workitharder at gmail.com  Sat May 24 01:58:53 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 22:58:53 -0700 (PDT)
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
Message-ID: <98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>

On May 23, 6:31?pm, Yosifov Pavel <aqua... at gmail.com> wrote:
> Does somebody know existent tool for checking unhandled exceptions?
> Like in Java when method throws exception but in code using this
> method, try...catch is missed. May be something like PyChecker?
>
> --
> /Pavel

I know that pychecker doesn't do that. The set of handled exceptions
is probably much smaller than handled. Almost every line of code can
throw ten different exceptions (at least my code). I'm not sure what
specifically the output you'd like to see would look like.


From goldnery at gmail.com  Sat May 10 13:39:40 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 10:39:40 -0700 (PDT)
Subject: list object
Message-ID: <066c62a8-4400-4f94-bddb-d23eac01486a@27g2000hsf.googlegroups.com>

my manual contain chapter about lists with python. when i try to copy
paste :

li = ["a", "b", "mpilgrim", "z", "example"] (1)


it i get this errore:

"TypeError: 'list' object is not callable"

i was wondering if their is  any special module I should import before
i use this function

i know i ask foolish questions it's my first day with python and i
have experience only with PHP and javascript, so please be patient

thanks


From bearophileHUGS at lycos.com  Sat May  3 14:59:59 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 3 May 2008 11:59:59 -0700 (PDT)
Subject: Light slices + COW
Message-ID: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>

Sometimes different languages suggests me ways to cross-pollinate
them.

(Note: probably someone has already suggested (and even implemented)
the following ideas, but I like to know why they aren't fit for
Python).



Python generators now allow me to package some code patterns common in
my code, that other (older) languages didn't allow me to extract; for
example given a sequence (array, list, etc) of items now and then I
need to scan all the upper triangle of their cross matrix:



def xpairs(seq):

    len_seq = len(seq)

    for i, e1 in enumerate(seq):

        for j in xrange(i+1, len_seq):

            yield e1, seq[j]



Or adjacent ones (there are ways to generalize the following function,
but this the most common situation for me):



def xpairwise(iterable):

    return izip(iterable, islice(iterable, 1, None))



That xpairs() generator is nice, but it's not the best possible code
(but you may disagree with me, and you may think that code better than
the successive D code that uses two slices). Inside it I can't use a
list slicing because it copies subparts of the list, probably becoming
too much slow (for example if len(seq) == 1000).



Compared to Python, the D language is at lower level, so you may
expect it to have a worse syntax (but the ShedSkin compiler has shown
me once for all that you can have a language that is both high-level,
with a short & sexy syntax, and very fast), but you can define a
xpairs() iterable class in it too, and the core of that iterable class
there's a method that may look like this:



if (this.seq.length > 1)

  foreach (i, e1; this.seq[0 .. $-1])

    foreach (e2; this.seq[i+1 .. $]) {

      result = dg(e1, e2); if (result) break; // yield

    }



Where the strange last line is the yield, and the $ inside [] is the
length of the current array (a very clever idea that avoids the need
for negative indexes).


That D code is as fast or faster than the code you can back-translate
from Python, this is possible because in D arrays slices are very
light, they are a struct of <length, pointer> (in the future they may
change to a couple of pointers, to speed up the array slice scanning).
So if you slice an array you don't copy its contents, just the start-
end points of the slice. If you read/scan the slice that's all you
have, while if you write on it, D uses a Copy-On-Write strategy, that
is a just-in-time copy of the slice contents.

In practice this speeds up lot of code that manages strings and arrays
(like a XML parser, making it among the faster ones).


Being the slice a struct, it's stack allocated, so the inner foreach
doesn't even create a slice object in the heap each time the outer
foreach loops.


One problem with this strategy is that if you have a huge string, and
you keep only a little slice of it, the D garbage collector will keep
it all in memory. To avoid that problem you have to duplicate the
slice manually:



somestring[inf...sup].dup;



I think Psyco in some situations is able to manage string slices
avoiding the copy.



I think Python 3.0 too may enjoy a similar strategy of light slices +
COW for strings, lists and arrays (tuples and strings don't need the
COW).



Bye,

bearophile


From mail at timgolden.me.uk  Sun May 25 14:33:43 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 25 May 2008 19:33:43 +0100
Subject: UTF problem?
In-Reply-To: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
Message-ID: <4839B107.9010700@timgolden.me.uk>

Vesa-Matti Sarenius wrote:
> I am trying to set up Linux printing via Windows XP and using this HOWTO:
> 
> http://justin.yackoski.name/winp/
> 
> I have one problem. When I send a file via CUPS to the windows spool
> directory dirwatch.py (http://justin.yackoski.name/winp/dirwatch.txt) dies
> and gives:
> 
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0'
> in position 77: ordinal not in range (128)
> 
> I think that this has something to do with UTF-8 what I do not know is how
> to get over it? 
> 
> So could someone please help me to get dirwatch.py script to understand my
> filenames (which, btw, do not have any non-ascii symbols, and will work
> if I manually copy-rename them).

Well you don't say what line it's dying on, but I would guess
it's the line which says "print full_filename" (altho' it
could be when it prints the output from gsprint.exe). In
any case, \xa0 is a non-breaking space:

<code>
import unicodedata

print unicodedata.name (u"\xa0")
</code>

so it's just possible that one of your filenames has
a non-ascii char in it without your noticing? (Altho'
I'd find that an odd character to include in a filename).

ReadDirectoryChangesW is the Unicode version of the
ReadDirectoryChanges API, so always returns Unicode objects
even if there are no non-ascii chars in the filenames.

To get round the problem in the immediate term, change
both print lines to something like:

print repr (full_filename)

This will show exactly what's in the filename. To do
the thing properly, you'll want to encode the filename
to something standard, eg, sys.stdout.encoding or just
"utf8":

print full_filename.encode ("utf8")

but since these are just info outputs I imagine you're
not too bothered how they look.

TJG


From Russ.Paielli at gmail.com  Mon May 26 00:49:05 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Sun, 25 May 2008 21:49:05 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>

On May 25, 2:32 pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
> > Sh4wn <luckyluk... at gmail.com> writes:
> > > first, python is one of my fav languages, and i'll definitely keep
> > > developing with it. But, there's 1 one thing what I -really- miss:
> > > data hiding. I know member vars are private when you prefix them with
> > > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > > before it.
>
> > From whom are you trying to hide your attributes?
>
> I saw this "don't need it" pattern in discussions about the ternary
> "if..else" expression and about "except/finally on the same block
> level".
> Now Python has both. Actually it is very useful to be able to
> distinguish
> between inside and outside. This is obvious for real world things e.g.
> your
> TV. Nobody likes to open the rear cover to switch the channel. Similar
> arguments apply to software objects. "data hiding" is a harsh name, I
> would
> call it "telling what matters". The need for this becomes
> indispensable in
> really big software packages like the Eclipse framework with approx.
> 100000
> classes. If you cannot tell the difference between inside and outside
> you
> are lost.
>
> > In Python, the philosophy "we're all consenting adults here" applies.
>
> Please don't sell a missing feature as a philosophy. Say you don't
> need/want
> it. But don't call it philosophy.
>
> > You shouldn't pretend to know, at the time you write it, all the uses
> > to which your code will be put.
>
> It's *your* *decision* which uses will be available. Your explanation
> appears
> to me as a fear to decide.
>
> > If you want the users of your code to know that an attribute should
> > not be used as a public API for the code, use the convention of naming
> > the attribute with a single leading underscore.
>
> Littering your class definition with dozens of underscores is exactly
> the
> line noise we love to criticize in Perl.
>
> > > Python advertises himself as a full OOP language, but why does it
> > > miss one of the basic principles of OOP?
>
> > Who taught you that enforced restrictions on attribute access was a
> > "basic principle" of OO?
>
> Nearly every introduction to OOP? Please don't tell me that
> encapsulation
> does not mean "enforced restriction". If the language has no syntactic
> support for encapsulation then it does not have encapsulation. Similar
> argument applies to Java where programmers sometimes claim that Java
> "has"
> properties because of setCrap/getCrap.
>
> __
> Joe


Dear Mr. Cool,

Excellent post. I agree with you entirely.

I've always considered the underscore conventions in Python an ugly
hack in an otherwise elegant language. I often avoid them even when
they technically belong just because I don't like the way they make my
code look.

Your analogy of the TV set is nice. The front control panel should be
clearely distinguished from the covered control panel and certainly
from the guts. It's more than just a matter of keeping the user from
doing something stupid -- it's a matter of design style.

I am also bothered a bit by the seeming inconsistency of the rules for
the single underscore. When used at file scope, they make the variable
or function invisible outside the module, but when used at class
scope, the "underscored" variables or functions are still fully
visible. For those who claim that the client should be left to decide
what to use, why is the client prohibited from using underscored
variables at file scope?

I may be full of beans here, but I would like to make a suggestion.
Why not add a keyword such as "private," and let it be the equivalent
of "protected" in C++? That would make member variables and functions
visible in inherited classes. The encapsulation wouldn't be as
airtight as "private" in C++, so clients could still get access if
they really need it in a pinch, but they would know they are bending
the rules slightly. I realize that single underscores do that already,
but they are just unsightly.


From pball.benetech at gmail.com  Mon May 26 21:12:18 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Mon, 26 May 2008 18:12:18 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
	<3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>
	<m2lk1x5wez.fsf@googlemail.com>
	<98b0a07f-0444-4814-a7a6-6a0a049068a3@w5g2000prd.googlegroups.com>
Message-ID: <c73fb79b-a946-4b2c-9d37-ffda735a8541@z24g2000prf.googlegroups.com>

Partial solution: the complements idea sparked a slightly new
direction. S is defined as above (all sets except s0, the target).

fset = frozenset
s0 = fset([1])
s1 = fset([1,2])
s2 = fset([2])
s3 = fset([2,3,4])
s4 = fset([3])
s5 = fset([1,2,3,4,5])
s6 = fset([5])
s7 = fset([2,3,4,5])
S = set([s1,s2,s3,s4,s5,s6,s7])

# solutions for s0:
# s1 - s2
# s5 - s7
# s5 - s3 - s6

def find_complement(S, s0):
    for s in set(s for s in S if s & s0):
        symm_diff = s ^ s0
        if symm_diff in S:
            yield s0, s, symm_diff

for c in find_complement(S, s0):
    print c

(frozenset([1]), frozenset([1, 2]), frozenset([2]))
(frozenset([1]), frozenset([1, 2, 3, 4, 5]), frozenset([2, 3, 4, 5]))

So this algorithm can find partitions with 2 parts. It's helpless for
more complicated relationships -- in this case the combination s0 = s5-
s3-s6. Some kludgy ideas occur to me, and I'll work on them now. All
ideas welcome -- PB.




From deets at nospam.web.de  Sun May 18 11:05:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 17:05:44 +0200
Subject: waiting on an event blocks all signals
In-Reply-To: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
References: <27553255-72e6-4df6-944b-ac4637a78f3d@m3g2000hsc.googlegroups.com>
Message-ID: <69auuoF2uob0sU1@mid.uni-berlin.de>

alan schrieb:
> This ignores CTRL-C on every platform I've tested:
> 
> python -c "import threading; threading.Event().wait()"
> ^C^C^C^C
> 
> It looks to me like all signals are masked before entering wait(). Can
> someone familiar with the internals explain and/or justify this
> behavior? Thanks,

They aren't masked. Read the docs:

# Although Python signal handlers are called asynchronously as far as 
the Python user is concerned, they can only occur between the ``atomic'' 
instructions of the Python interpreter. This means that signals arriving 
during long calculations implemented purely in C (such as regular 
expression matches on large bodies of text) may be delayed for an 
arbitrary amount of time.


(http://docs.python.org/lib/module-signal.html)

Which is what is happening here - wait is implemented in C. So the 
arriving signal is stored flagged in the interpreter so that the next 
bytecode would be the signal-handler set - but the interpreter still 
waits for the blocked call.

Diez


From byte8bits at gmail.com  Thu May 22 17:29:10 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 22 May 2008 17:29:10 -0400
Subject: Shell-independent *nix setup script
In-Reply-To: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
References: <baff4253-5a83-465c-9c68-d7d5199b0ee1@b5g2000pri.googlegroups.com>
Message-ID: <g14ojr$mb$1@solaris.cc.vt.edu>

scott.hafeman at rogers.com wrote:
> Hi,
> Is it worthwhile maintaining a production application setup script in
> Python as opposed to shell-script?  

I do not think so. Perhaps 'in conjunction with', but not 'opposed 
to'... sh is the lowest common denominator of shells. Script for sh and 
your script will run on most any Unix. Python is gaining acceptance, but 
is still not present everywhere by default... Solaris for example.


From tjreedy at udel.edu  Fri May  2 18:28:53 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 2 May 2008 18:28:53 -0400
Subject: Why is None <= 0
References: <fut7q3$kup$1@newsreader2.utanet.at><481226f9$0$20866$9b622d9e@news.freenet.de>
	<slrng14t4k.vg2.jon+usenet@snowy.squish.net>
	<769285d3-d774-4690-9062-d03c8fb1a93f@24g2000hsh.googlegroups.com>
Message-ID: <fvg4j5$3gc$1@ger.gmane.org>


"Aaron Watters" <aaron.watters at gmail.com> wrote in message 
news:769285d3-d774-4690-9062-d03c8fb1a93f at 24g2000hsh.googlegroups.com...
|What's up with Tim Peters anyway?  I haven't seen much from him for a 
while.

I miss him too ;-)
He occasionally responds to tracker or pydev math issues where his unique 
knowledge and experience is really needed.  (As recently as last Jan).
That is all I know.
tjr





From mail at timgolden.me.uk  Tue May  6 04:21:32 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 09:21:32 +0100
Subject: listing computer hard drives with python
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0852C5@percello-sbs.percello.local>
Message-ID: <4820150C.3080906@timgolden.me.uk>

Ohad Frand wrote:
> I am looking for a way to get a list of all active logical hard drives
> of the computer (["c:","d:"..])

You can do this with WMI [*] under Windows:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_LogicalDisk ():
 print i.Caption

</code>

If you want only fixed disks (ie exluding external drives,
USB and CD drives etc) then specify DriveType=3:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_LogicalDisk (DriveType=3):
 print i.Caption

</code>

[*] http://timgolden.me.uk/python/wmi.html

TJG



From grflanagan at gmail.com  Wed May 28 08:11:55 2008
From: grflanagan at gmail.com (Gerard Flanagan)
Date: Wed, 28 May 2008 05:11:55 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
Message-ID: <6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>

On May 28, 1:48 pm, afrobeard <afrobe... at gmail.com> wrote:
> The following following code fails with the failiure:-
>
> File "test.py", line 27, in __main__.sanitize_number
> Failed example:
>     sanitize_number('0321-4683113')
> Expected:
>     '03214683113'
> Got:
>     '03214683113'
>
> Expected and Got looks the same. The value should verify.  What am I
> doing wrong here ?
>
> Thanks in advance. I really appreciate your time.
>
> P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
> Windows XP

Your code works for me (Python 2.5 WinXP).

Are you mixing tabs and spaces?

G.



From benjamin.kaplan at case.edu  Sun May 25 08:34:02 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sun, 25 May 2008 08:34:02 -0400
Subject: which datastructure for fast sorted insert?
In-Reply-To: <6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
Message-ID: <ec96e1390805250534j2f6b8d57k7a341d3aadced2cf@mail.gmail.com>

On Sun, May 25, 2008 at 3:10 AM, <notnorwegian at yahoo.se> wrote:

>
> > >>> l=list(s)
> > >>> l.sort()
> > >>> l
> >
> > ['a', 'b', 'c']
> >
> > hth,
> > Rares
>
> sets dont seem to be so good because there is no way to iterate them.
>
> s.pop()                 remove and return an arbitrary element from s;
> raises
> KeyError if empty
>
> i dont want to remove i just want to get the string that is stored
> there.


The only requirement for iterating through something is that it defines an
__iter__ method, which set does. This means you can use iter(a_set) to get
your iterator, or just use "for i in a_set" to iterate automatically.
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From Inyeol.Lee at gmail.com  Thu May 29 04:43:02 2008
From: Inyeol.Lee at gmail.com (Inyeol.Lee at gmail.com)
Date: Thu, 29 May 2008 01:43:02 -0700 (PDT)
Subject: How do I tell "imconplete input" from "valid input"?
References: <52dfcd24-3182-4dc7-9141-4324864783e5@g16g2000pri.googlegroups.com>
Message-ID: <d55abb23-1f0f-4724-8feb-4f68f0857711@z16g2000prn.googlegroups.com>

On May 29, 9:26 am, ?? <takau... at gmail.com> wrote:
> Hi everyone,
>
>  I am developing the console which has the embedded Python interactive
> interpreter. So, I want to judge whether current command is complete
> or not. Below is good example to solve this problem.
> //
> //http://effbot.org/pyfaq/how-do-i-tell-incomplete-input-from-invalid-i...
> //
> int testcomplete(char *code)
>   /* code should end in \n */
>   /* return -1 for error, 0 for incomplete, 1 for complete */
> {
>   node *n;
>   perrdetail e;
>
>   n = PyParser_ParseString(code, &_PyParser_Grammar,
>                            Py_file_input, &e);
>   if (n == NULL) {
>     if (e.error == E_EOF)
>       return 0;
>     return -1;
>   }
>
>   PyNode_Free(n);
>   return 1;
>
> }
>
>  But, I think this code has a problem. For example, when argument
> 'code' has below python command,
>
> if x % 2:
>    print "odd"
>
> at the current situation, this function returns COMPLETE!
> But, I think that sometimes users want to type "else" statement. So, I
> expected to get INCOMPLETE from this function, but I didn't.
>
> How should I do it?
>
> Thanks,
> urai

I guess you should use "Py_single_input" instead of "Py_file_input" in
your code, which requires extra NEWLINE to end complex statement.
Plz check details in Grammar/Grammar from python source distribution

--Inyeol


From danb_83 at yahoo.com  Thu May 22 00:42:08 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Wed, 21 May 2008 21:42:08 -0700 (PDT)
Subject: related to python
References: <mailman.1461.1211424054.12834.python-list@python.org>
Message-ID: <eccb9a17-8d96-41f1-bbd7-dae2431c813c@79g2000hsk.googlegroups.com>

On May 21, 9:34?pm, "salil_reeves" <salil_ree... at yahoo.co.in> wrote:
> develop a function called standardise_phrase to convert
> the user's input to a standard form for subsequent processing. This
> involves:
> 1. removing all inter-word punctuation, which for our purposes is
> assumed to
> consist only of commas (`,'), full stops (`.'), exclamation marks
> (`!') or
> question marks (`?');
> 2. stripping away any leading and trailing blank spaces; and
> 3. replacing words in the user's input with ELIZA's preferred
> vocabulary.
> how it is done ??
> can anyone help me with it



From ivan.illarionov at gmail.com  Thu May  1 16:26:35 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 1 May 2008 20:26:35 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
Message-ID: <fvd91r$1g2$1@news.mtu.ru>

On Thu, 01 May 2008 14:13:08 -0500, Jon Ribbens wrote:

> On 2008-05-01, Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>> I used XML files before for this purpose and found YAML much easier and
>> better suitable for the task.
>>
>> Please explain why don't like YANL so much?
> 
> Because even the examples in the spec itself are unreadable gibberish.
> The PyYAML library is over 300kB! These are rather big clues that it's
> unsuitable for the purpose for which it was designed. It's certainly
> unsuitable for use as a configuration file format, where it is overkill
> by several orders of magnitude.
> 
>   !!str &a1 "foo":
>   !!str bar
>   &a2 baz : *a1
>   !<tag:yaml.org,2002:str> foo :
>   !<!bar> baz
> 
> This is supposed to be human readable?

Thanx, now I see your point. I didn't mean all the fancy features of 
YAML, but the most basic sintax.

Compare this:
    <user id="babooey" on="cpu1">
        <firstname>Bob</firstname>
        <lastname>Abooey</lastname>
        <department>adv</department>
        <cell>555-1212</cell>
        <address password="xxxx">ahunter at example1.com</address>
        <address password="xxxx">babooey at example2.com</address>
    </user>

and this:
        babooey:
            computer : cpu1
            firstname: Bob
            lastname: Abooey
            cell: 555-1212
            addresses:
                - address: babooey at example1.com
                  password: xxxx
                - address: babooey at example2.com
                  password: xxxx

I find the latter *much* more readable.

And the most important thing is that it *maps directly to Python data 
types*, in this case dictionaries and lists:
{babooey: {computer: cpu1, firstname: Bob, lastname: Abooey, cell: 555, 
1212, addresses: [{address: babooey at example1.com, password: xxxx},
{address: babooey at example2.com, password: xxxx}]}

I took the example from 
http://www.kuro5hin.org/story/2004/10/29/14225/062
I haven't use my own example only because I don't have one at hand right 
now. YAML, in its simple form, definetely makes me more productive. I 
wasted too much time with XML in the past and I won't ever use it as a 
serialization or config/settings format again. .INI/ConfigParser is too 
limited and has no standards. I just don't see anything better than YAML 
to do human and Python editable config files and to serialize information 
for later use.

>> PS. Your reply remind me of early days of Python when Perl programmers
>> said exacly the same thing about Python.
> 
> I think I would suffer irony overload if I saw a Perl programmer
> criticising Python for being hard to read ;-)


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:29:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:29:13 -0300
Subject: Help with pyserial and sending binary data?
References: <721268.64699.qm@web52409.mail.re2.yahoo.com>
Message-ID: <op.uajpyzppx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 16:50:46 -0300, Rich <richietommy at yahoo.com> escribi?:

> I am working on a python library for sending and receiving data from a  
> Subaru's ECU (the fuel injection computer) via the OBD-II port and an  
> OBD to USB cable, with the Subaru Select Monitor protocol. There are a  
> #--------------------------
> import serial, string
> output = " "
> ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
> ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
> while output != "":
>    output = ser.read()
>    print hex(ord(output))
> #--------------------------
>
> The only problem is that when I send the ECU init command, it just echos  
> back the data I sent it, which, from my understanding, means that I sent  
> an invalid request packet.[...]
> My best guess I have heard is that chr() isn't encoding the hex value  
> properly to a byte value the ECU understands (wrong endianness?), or  
> chr() encoding isn't always representing hex as an 8-bit byte. chr()  
> should always encode to an 8-bit byte (not 7-bit ASCII or anything,  
> correct)? Is there any way to switch byte endianness, or ensure I am  
> encoding 8-bit bytes? Any help is much appreciated. Thanks!

No, chr works as it should. The same thing can be written as  
ser.write("\x80\x10\xF0\x01\xBF\x40")
Are you sure you're talking to the right device, /dev/ttyUSB0? Are the  
comm parameters correct?
(BTW, if you get more than a single character per loop, the print  
statement will fail - try with ser.read(1))

-- 
Gabriel Genellina



From pball.benetech at gmail.com  Sun May 25 15:51:14 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 12:51:14 -0700 (PDT)
Subject: set partition question
Message-ID: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>

dear pythonistas,

So imagine that we have a set of sets S. If we pick arbitrarily one
set, s0, what are all the combinations of other sets in S which when
combined by set operations result in s0?

s0 = set([1])
s1 = set([1,2])
s2 = set([2])
S = set([s0,s1,s2])
one answer we're searching for is s0 = s1 - s2

There may be arbitrarily many set elements (denoted by integers
1,2,3,...) and arbitrarily many combinations of the elements composing
the sets s_i (s0, s1, ...). We can use any operation or function which
takes and returns sets.

I think this problem is related to integer partitioning, but it's not
quite the same. The range of answers has a little combinatorial
explosion problem as S gains new members. In my problem, len(S) is
usually on the order of 1M, and in the worst case, 10M, and there are
on the order of 10k elements.

My attempts to come up with an algorithm have not succeeded. Any ideas
occur to you folks? -- PB.

--
Patrick Ball, Ph.D.
Chief Scientist
   & Director, Human Rights Program
http://www.benetech.org
http://www.hrdag.org
http://www.martus.org



From deets at nospam.web.de  Thu May 29 04:04:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 10:04:15 +0200
Subject: pydb remote debugging/cmd.Cmd over socket?
In-Reply-To: <wihwsldztl4.fsf@panix5.panix.com>
References: <6a5b8qF35n4hiU1@mid.uni-berlin.de>
	<wihwsldztl4.fsf@panix5.panix.com>
Message-ID: <6a76c6F34bs9qU1@mid.uni-berlin.de>

> As part of the 2006 Google Summer of Code project Matt Flemming
> started working on remote debugging in pydb. Alas it wasn't completed
> and I let the code fall through the cracks. 
> 
> Matt claimed it worked to some degree but I could never get it to work
> for me. Most definitely the code has atrophied.
> 
> The user interface was loosely based or reminiscent of gdb. So
> you'd run pydbserver either as a command inside the debugger or as an
> option to pydb or call inside Python pdbserver after importing. 
> 
> There is a connection class (file pydb/connection.rb) which was to
> allow different kinds of protocols, like a socket connection or 
> a serial line connection, or maybe even two FIFO's so that you could
> connect to a different process on the same computer.
> 
> And there were some commands on the user-interaction side
> to attach or detach the Python program you want to debug.
> 
> If you look in pydb.py.in and gdb.py.in you'll see some code commented
> out with double hashes which is part of this effort.
> 
> I invite you or others to try to resurrect this effort. However as I
> look at the code now, it doesn't make much sense other than the broad
> outline given above.

Hm. Ok, I'll look into that. It's just that I don't get cmd.Cmd to work 
against two streams. Maybe I need to dive into unix-coding a bit deeper 
again.

> Another approach and possibly a much simpler one if you are looking
> for a Python debugger which supports remote debugging is Winpdb
> http://winpdb.org/ by Nir Aides.


I've found that - and while it's nice, it has one problem: I can only 
start it with winpdb governing the process already, preventing python 
from starting.

In contrast, the possibility to use a sginal to start the debugger of 
pydb is great, so that's the reason I want to stick with it.

Diez


From rhamph at gmail.com  Mon May  5 12:53:31 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 5 May 2008 09:53:31 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com> 
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
Message-ID: <e61e611f-a01b-4c57-bffa-bc7182cd82b1@h1g2000prh.googlegroups.com>

On May 3, 4:31 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
> > On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>
> > > Arnaud Delobelle wrote:
>
> > >> sum() works for any sequence of objects with an __add__ method, not
> > >> just floats!  Your algorithm is specific to floats.
>
> > > This occurred to me also, but then I tried
>
> > > sum(['abc', 'efg'], '')
>
> > Interesting, I always thought that sum is like shortcut of
> > reduce(operator.add, ...), but I was mistaken.
>
> > reduce() is more forgiving:
> > reduce(operator.add, ['abc', 'efg'], '' ) # it works
> > 'abcefg'
>
> Hm, it works for lists:
> sum(([1], [2]), [])
> [1, 2]
>
> However I find the seccond argument hack ugly.
> Does the sum way have any performance advantages over the reduce way?

The relative differences are irrelevant.  The important thing is they
both perform quadratically, which makes them the wrong choice (unless
you can guarantee your inputs are trivial.)

$ python2.5 -m timeit 'x = [[0]*1000]*10' 'sum(x, [])'
1000 loops, best of 3: 566 usec per loop
$ python2.5 -m timeit 'x = [[0]*1000]*100' 'sum(x, [])'
10 loops, best of 3: 106 msec per loop
$ python2.5 -m timeit 'x = [[0]*1000]*1000' 'sum(x, [])'
10 loops, best of 3: 18.1 sec per loop

Per element of the outer list, that's 0.0566, 1.06, 18.1 msec.
Nasty.  Use this instead:

$ python2.5 -m timeit -s 'x = [[0]*1000]*10' 'y = []' 'for a in x:
y.extend(a)'
10000 loops, best of 3: 80.2 usec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*100' 'y = []' 'for a in x:
y.extend(a)'
1000 loops, best of 3: 821 usec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*1000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 24.3 msec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*10000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 241 msec per loop
$ python2.5 -m timeit -s 'x = [[0]*1000]*100000' 'y = []' 'for a in x:
y.extend(a)'
10 loops, best of 3: 2.35 sec per loop

Per element of the outer list t hat's 0.00802, 0.00821, 0.0243,
0.0241, 0.0235 msec.  At 1000 elements it seemed to cross some
threshold (maybe cache related, maybe allocation related), but overall
it scales linearly.  Know your algorithm's complexity.


From g.kokosinski at gmail.com  Mon May 26 08:26:15 2008
From: g.kokosinski at gmail.com (=?ISO-8859-2?Q?Grzegorz_Kokosi=F1ski?=)
Date: Mon, 26 May 2008 14:26:15 +0200
Subject: Signal handler doesn`t handle any signals while main thread is blocked
Message-ID: <e761e0d90805260526l38f8b01ep43085884679bd962@mail.gmail.com>

Hi!
I waste a lot of my time figuring why this snip of code doesn`t work.
And still without any solution ;/
Does anybody know why this handler cannot handle SIGINT signal? What
did I wrong?

Thanks in advance.

#
# CODE
#
import signal
from threading import *

def siginthandler(signum, frame):
     global work,cv
     print 'terminating...'
     cv.acquire()
     work = 0
     cv.notifyAll ()
     cv.release()

work = 1
signal.signal (signal.SIGINT, siginthandler)

print 'wait for SIGINT signal'
cv = Condition ()
cv.acquire()
while work:
    print 'waiting...'
    cv.wait()
print 'woke up'
cv.release()

print 'terminated'


From a.schmolck at gmail.com  Sat May  3 19:10:33 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Sun, 04 May 2008 00:10:33 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
Message-ID: <yfswsmbf0gm.fsf@gmail.com>

AlFire <spamgrinder.trylater at ggmail.com> writes:

>> The threading module already has a function to return the number of Thread
>> objects currently alive.
>
> I have threads within threads - so it does not suit me :-(.

How about using a scalar numpy array? They are mutable, so I assume that x +=
1 should be atomic.

'as


From nick at craig-wood.com  Wed May 28 11:30:18 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 28 May 2008 10:30:18 -0500
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
Message-ID: <slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>

Matt <mr.edel at gmx.at> wrote:
>  Okay so well, I have quite a problem right now with a file stream. What 
>  I am doing is to use the Cannon SDK dlls to get control over my old 
>  Cannon A60 Camera for some surveillance useage.
> 
>  By using ctypes it all worked well until now. I am able to load the 
>  dlls, use a lot of functions, am able to connect to the camera, read out 
>  some params, send commands etc... but now I am stuck with reading the 
>  picture data.
> 
>  In C the code looks as follows (found in an supplemental *.h SDK file:
[snip]
>  So, since I'm no C-Professional, I can only guess what that code does. 
>  With some previous commands I tell the camera to make a picture. This 
>  picture is then automatically moved to the PCs RAM and with the function 
>  above (CDGetReleasedData) I should be able to access this stream. Now I 
>  havn't accessed any stream with ctypes yet so I have only a rough idea 
>  how it could work.
> 
>  The following are the relevant parts of my code that don't work:
> 
> 
>  # Definitions:
> 
>  class cdReleaseImageInfo(Structure):
>       _fields_ = [("SequenceID", c_uint),
>                        ("DataType", c_uint),
>                        ("Format", c_ubyte),
>                        ("DataSize", c_uint),
>                        ("Filename", c_char * 2)]
> 
> 
>  class cdStream(Structure):
>       _fields_ = [("contextH", c_uint),
>                        ("open", c_uint),
>                        ("close", c_uint),
>                        ("read", c_uint),
>                        ("write", c_uint),
>                        ("seek", c_uint),
>                        ("tell", c_uint)]

These c_uints would be better as c_void_p at minimum

Howerver I suspect you are going to have to implement these callback
functions - read this section of the manual

  http://docs.python.org/lib/ctypes-callback-functions.html

I suspect it will call back your functions for the given
functionality, eg "open", "close" etc...

>  class memunion(Union):
>       _fields_ = [("lpszFileName", c_char),

This should be c_char_p I suspect...

>                        ("pStream", cdStream)]

and this should be POINTER(cdStream)

>  class cdStgMedium(Structure):
>       _fields_ = [("Type", c_uint),
>                        ("u", memunion)]
> 
> 
> 
> 
>  # command:
> 
>  datainfo = cdReleaseImageInfo()
>  data = cdStgMedium()
>  errorcode = cdsdk.CDGetReleasedData(devicehandle, byref(cbfunct), 
>  c_uint(1), c_uint(1), byref(datainfo), byref(data))
> 
>  The function "cdsdk.CDGetReleasedData" itself gets executed correctly, 
>  but returns an "Invalid Parameter" errorcode. there's also no useful 
>  data whereas datainfo gets written correctly. I know that my cdStream 
>  can't work, facing the C-code, but what'd be the right cdStream class? 
>  What can I do? Any ideas?

I've noted some obvious problems above.

To get this to work will require some C knowledge.  If they supply
some example C code I'd work through that translating it line by line
to python+ctypes.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From castironpi at gmail.com  Thu May 15 22:31:35 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:31:35 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com> 
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com> 
	<1210893082.3312.2.camel@jmk> <1210894364.3312.10.camel@jmk> 
	<mailman.1197.1210894991.12834.python-list@python.org>
	<24ab8bf8-7fac-408c-b8c7-0f027a9f3454@m36g2000hse.googlegroups.com>
Message-ID: <325be043-d911-4cce-9c3b-56209033cd68@d45g2000hsc.googlegroups.com>

On May 15, 6:49?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:42?pm, John Krukoff <jkruk... at ltgc.com> wrote:
>
>
>
>
>
> > On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> > > On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > > > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > > > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > > > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > > > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > > > i buffer and parse. ?apologies if i misrepresented my code!
>
> > > > > > > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > > > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > > > work:
>
> > > > > > > from mutagen.mp3 import MP3
> > > > > > > id3tags = MP3(urllib2.urlopen(URL))
>
> > > > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > > > string or buffer, instance found". ?does this mean i need to convert
> > > > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > > > object? ?if so, do i just decode() with 'utf-8', or is this more
> > > > > > > complex? ?as of now, doing so gives me mostly "No such file or
> > > > > > > directory" errors, with a few HTTP 404s.
>
> > > > > > [snip]
> > > > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > > > contents.
>
> > > > > cool, so how do i give it the path, if not in the form of a URL
> > > > > string? ?maybe this is obvious...
> > > > > --
> > > > >http://mail.python.org/mailman/listinfo/python-list
>
> > > > It doesn't look like you can, with mutagen. So, time to find a different
> > > > library that supports arbitrary file objects instead of only file paths.
> > > > I'd suggest starting here:
> > > >http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
>
> > > > Possibly one with actual documentation, since that would also be a step
> > > > up from mutagen.
>
> > > After a bit of time looking around, looks like nearly all the python id3
> > > modules expect to work with filenames, instead of file objects.
>
> > > I can't vouch for it, and the documentation still looks sparse, but this
> > > module at least looks capable of accepting a file object:
> > >http://pypi.python.org/pypi/tagpy
>
> > > Looks like it'd be a challenge to build if you're on windows, since it
> > > depends on an external library.
>
> > > Alternately, you could probably create a subclass of the mutagen stuff
> > > that used an existing file object instead of opening a new one. No idea
> > > what that might break, but seems like it would be worth a try.
>
> > > As last ditch option, could write the first few kb of the file out to a
> > > temp file and see if mutagen will load the partial file.
>
> > Okay, now I'm officially spending too much time looking through this
> > stuff.
>
> > However, looks like the "load" method of the MP3 class is what you'd
> > want to override to change mutagen's file loading behavior. Probably
> > pass the URL as the filename, and take a cut & paste version of the
> > default load method from ID3FileType and change it to use urllib2 to
> > open it instead of a local file open.
>
> > Might work. Might not. No warranty express or implied.
> > --
> > John Krukoff <jkruk... at ltgc.com>
> > Land Title Guarantee Company- Hide quoted text -
>
> > - Show quoted text -
>
> I'm supposed to question "time.toomuch.spend". ?NAMERS!- Hide quoted text -
>
> - Show quoted text -

Is there a way 'time.toomuch.spend' can be scanned for in code?  If
not, let's play!


From gagsl-py2 at yahoo.com.ar  Sun May 25 00:38:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 01:38:59 -0300
Subject: How to print a sorted list as a multi-column table
References: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>
	<0ab498fa-7983-4ea0-abcf-cf7f827bd05e@x35g2000hsb.googlegroups.com>
Message-ID: <op.ubo0i9qrx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 15:03:16 -0300, Mensanator <mensanator at aol.com> escribi?:
> On May 23, 10:30?am, Sverker Nilsson <s... at sncs.se> wrote:

>> Why are tables formatted like the following, when sorted? (Both in
>> linux eg ls, ftp help, and in Python help() when listing (eg)
>> modules))
>>
>> (1)
>>
>> a ?g ?m ?s
>> b ?h ?n ?t
>> c ?i ?o ?u
>> d ?j ?p ?v
>> e ?k ?q
>> f ?l ?r
>
> Because it's easier to read when the items have more
> than one letter. Have a look at a dictionary.

I agree with the OP. Dictionaries have two or more columns, but they span several *small* pages. The index above asumes an infinite page height, like a dictionary with all pages joined together making a single giant page. If dictionaries were sorted like the index above, "Python" could appear in the first page, and "Django" in the last one...

>> In a pager, if you want to limit the number of lines output at a time,
>> then yo'd see with (1) (if artifically limiting output to 2 lines):
>>
>> a ?g ?m ?s
>> b ?h ?n ?t
>>
>> So to see the f item you would have to scroll down all the way. ?The
>> number of times you would have to scroll down is in completely
>> unrelated to the item's position in sort order. That seems to defeat
>> the purpose of sorting in the first place. It feels strange, to me at
>> least. Anybody had the same feeling?
>
> No.

I do!

>> Well, what's the rationale (if any) for using the layout (1)?
>> Wouldn't layout (2) be better? And/or would it be confusing /
>> non-pythonic / non-unlixonic if a program used the (2) layout instead?
> The obvious solution is to do both, like the DOS directory
> command:

I'd use layout (1) *but* on a single page at a time. The layout you see on real dictionaries, or printed books.

-- 
Gabriel Genellina



From notontheweb at noisp.com  Wed May  7 20:22:13 2008
From: notontheweb at noisp.com (Jive Dadson)
Date: Thu, 08 May 2008 00:22:13 GMT
Subject: web client in Python Q
Message-ID: <VIrUj.662659$us.202429@fe04.news.easynews.com>

Hey folks.  I know approximately zero about web clients.  There's a 
simple task I want to do. (I think it's probably simple.) And I figure a 
Python script ought to be just the ticket.

Various web services for daily stock ticker info.  For example,

http://finance.google.com/finance/historical?q=NYSE:APC&output=csv

and

http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv

Those will serve up data for the stock APC.  But the problem is, a 
file-selection dialog pops up.  I would like to have a program that 
would supply a file name and download the data automatically, without 
human or mouse intervention.  Is that clear?

Can someone point me in the right direction?

Thankee.


From mnordhoff at mattnordhoff.com  Wed May 28 04:47:03 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Wed, 28 May 2008 08:47:03 +0000
Subject: Does this path exist?
In-Reply-To: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
Message-ID: <483D1C07.3070202@mattnordhoff.com>

s0suk3 at gmail.com wrote:
> I wanted to ask for ways to test whether a path exists. I usually use
> os.path.exists(), which does a stat call on the path and returns True
> if it succeeds, or False if it fails (catches os.error). But stat
> calls don't fail only when a path doesn't exist. I see that, at least
> on Windows, the instance of the exception has an attribute 'errno' set
> to 2 when it fails because the path doesn't exist. Is it a portable
> solution to rely on this (haven't tried it on Linux)? Are there other
> ways of testing whether a path exists?
> 
> Thanks,
> Sebastian

"import errno" and see if the exception's errno attribute is set to
errno.ENOENT (which is, yes, 2). It is portable.

If you Google [ENOENT Windows] or whatever, there are some differences
on different platforms, but not many.
-- 


From castironpi at gmail.com  Thu May 15 19:23:03 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 16:23:03 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
Message-ID: <8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>

On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
> The following proposed solution is not intended to be a solution, it
> goes completely against the zen of python. [Type import this into the
> python command interpreter]
>
> I brought it down to two lines:-
>
> l = range(6)
> [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> itertools would still be a better approach in my opinion.
>
> Just because I'm curious to know, can anyone bring it shorter[even if
> its cryptic] than this without invoking any Python Library.
>
> P.S. Once again I would not recommend using this as Explicit is better
> than Implicit
> P.P.S. It is strongly undesirable for us humans to use anything
> starting with __ :)
>
> On May 15, 5:10?pm, "Geoffrey Clements"
>
>
>
> <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > | It seems that I rather frequently need a list or iterator of the form
> > > | [x for x in <> while <>]
>
> > > I can think of two ways to interpret that.
> > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > >> the expression <B> is false.
>
> > def gen(a):
> > ? ? for x in a:
> > ? ? ? ? if B: break
> > ? ? ? ? yield x
>
> > a_gen = gen(A)
>
> > # now iterate over a_gen
>
> > --
> > Geoff- Hide quoted text -
>
> - Show quoted text -

In your original, you have:

> l = range(6)
> [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]

You may be hyperextending the use of '..if..else..', which is one of
my fears regarding 'with x as y'.  "l.__delslice__(0,len(l))" is not
an expression.


From frederic.degraeve at gmail.com  Wed May 21 06:12:52 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Wed, 21 May 2008 03:12:52 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <bac13dbd-fac5-44e0-9470-17c2b6bc3b16@c65g2000hsa.googlegroups.com>


> By the way, is it possible (and easy) to call a C function from a
> Python program??

Use SWIG. It's easy, smart and beautiful. After that, you can call C/C+
+ from a lot of scripting languages such as python, R, etc
A lot of open sources projects already use it.

http://www.swig.org/tutorial.html

Boost.Python is also very known (but never tested by myself).

Fr?d?ric


From charleshixsn at earthlink.net  Thu May 22 22:35:50 2008
From: charleshixsn at earthlink.net (Charles Hixson)
Date: Thu, 22 May 2008 19:35:50 -0700
Subject: Python and Flaming Thunder
In-Reply-To: <slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
	<slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>
Message-ID: <200805221935.50709.charleshixsn@earthlink.net>

On Thursday 22 May 2008 13:30:07 Nick Craig-Wood wrote:
> ...
> >From Armstrong's book: The expression Pattern = Expression causes
>
> Expression to be evaluated and the result matched against Pattern. The
> match either succeeds or fails. If the match succeeds any variables
> occurring in Pattern become bound.
>
> It is a very powerful idea and one which (along with the concurrency
> and message passing from Erlang) has been implemented for python :-
>
>   http://candygram.sourceforge.net/
>
> I've been reading the Erlang book and I have to say it has given me a
> lot of insight into python...

Although when comparing Candygram with Erlang it's worth noting that Candygram 
is bound to one processor, where Erlang can operate on multiple processors.  
(I'd been planning on using Candygram for a project at one point, but this 
made it unusable.)



From larry.bates at websafe.com`  Sat May 10 09:38:36 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Sat, 10 May 2008 08:38:36 -0500
Subject: firefox add-on to grab python code handily?
In-Reply-To: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
Message-ID: <_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>

CM wrote:
> I encounter a fair number of small Python scripts online, and usually
> try them out by copying them to the clipboard, pasting into Notepad,
> saving them, and either running them directly or opening them in
> IDLE.
> 
> And so I was wondering if anyone knew of an extension/add-on/script
> for Firefox which would allow a way to do something like this:
> 
> user highlights Python code on a webpage
> right clicks
> selects a menu item, "Save as Python code"
> FF pops up a filename dialog or popup for filename
> (and, though I don't know if this is possible, runs Python code)
> 
> Not an important thing by any means, but it would be a nice
> convenience.
> I know there are similar add-ons in FF for grabbing highlighted text
> and
> saving, but they are not good, as they don't seem to preserve line
> breaks
> properly or append the .py extension, etc.  I've Googled for this and
> so far
> it seems it doesn't exist.  Anyone know?
> 
> 

Since most of us keep Idle or some other Python IDE open nearly 100% of the time 
we just copy from webpage, paste into new Python document, and run in the IDE. 
While you could clearly write a plug-in for FF to achieve this, IMHO I doubt 
many people would actually use it.

-Larry


From skanemupp at yahoo.se  Tue May 27 19:26:28 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 27 May 2008 16:26:28 -0700 (PDT)
Subject: maximum recursion depth?
Message-ID: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>

i  received an error maximum recursion depth when processing large
amounts of data.

i dont know exactly how many recursive calls i made but id assume
50000 or so.

is there a definitie limit to the nbr of calls or is the memory that
runs out? is that then the RAMmemory? is there a special amount of
memory assigned for python or it just takes and takes until windows
runs out of it?


From arnodel at googlemail.com  Wed May  7 14:09:08 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 07 May 2008 19:09:08 +0100
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <m2od7i56m3.fsf@googlemail.com>

brad <byte8bits at gmail.com> writes:

> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value
> pairs:
>
> {'001' : '01'}

-> refdict

>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}

-> multidict

>
> Pseudo Code:
> for key, value in first_dict.iteritems():
>   # How do I do the following line?
>   if key not in second_dict or if it is, but has has the wrong value,
> then let me know

I think it's best to iterate over items of the second dictionary
first.  I am assuming that a key can be repeated in the second
dictionary, otherwise it could be a bit simpler:

missing_keys = set(first_dict)
for keys, val in second_dict.iteritems():
    for key in keys:
        missing_keys.discard(key)
        if first_dict.get(key, val) != val:
            print "wrong value for", key, 'in', keys
if missing_keys:
    print 'some keys are missing:', ',',join(remaining) 

-- 
Arnaud


From kris at FreeBSD.org  Fri May 30 19:04:50 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Sat, 31 May 2008 01:04:50 +0200
Subject: UNIX credential passing
In-Reply-To: <g1p3np$pvf$01$1@news.t-online.com>
References: <mailman.1755.1212099902.12834.python-list@python.org>
	<g1p3np$pvf$01$1@news.t-online.com>
Message-ID: <48408812.30901@FreeBSD.org>

Sebastian 'lunar' Wiesner wrote:
> [ Kris Kennaway <kris at FreeBSD.org> ]
> 
>> I want to make use of UNIX credential passing on a local domain socket
>> to verify the identity of a user connecting to a privileged service.
>> However it looks like the socket module doesn't implement
>> sendmsg/recvmsg wrappers, and I can't find another module that does this
>> either.  Is there something I have missed?
> 
> http://pyside.blogspot.com/2007/07/unix-socket-credentials-with-python.html
> 
> Illustrates, how to use socket credentials without sendmsg/recvmsg and so
> without any need for patching.
> 
> 

Thanks to both you and Paul for your suggestions.  For the record, the 
URL above is linux-specific, but it put me on the right track.  Here is 
an equivalent FreeBSD implementation:

def getpeereid(sock):
     """ Get peer credentials on a UNIX domain socket.

         Returns a nested tuple: (uid, (gids)) """

     LOCAL_PEERCRED = 0x001
     NGROUPS = 16

#struct xucred {
#        u_int   cr_version;             /* structure layout version */
#        uid_t   cr_uid;                 /* effective user id */
#        short   cr_ngroups;             /* number of groups */
#        gid_t   cr_groups[NGROUPS];     /* groups */
#        void    *_cr_unused1;           /* compatibility with old ucred */
#};

     xucred_fmt = '2ih16iP'
     res = tuple(struct.unpack(xucred_fmt, sock.getsockopt(0, 
LOCAL_PEERCRED, struct.calcsize(xucred_fmt))))

     # Check this is the above version of the structure
     if res[0] != 0:
         raise OSError

     return (res[1], res[3:3+res[2]])


Kris


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed May  7 12:05:21 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 07 May 2008 18:05:21 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <68e2a1F2s43b2U1@mid.individual.net>

jmDesktop wrote:

> Studying OOP and noticed that Python does not have Interfaces. 

By "OOP", you mean "Java", right? 8)

> Is that correct?  Is my schooling for nought on these OOP concepts
> if I use Python.  Am I losing something if I don't use
> the "typical" oop constructs found in other languages (Java, C#
> come to mind.)  

AFAIK, Interfaces weren't "typical" before Java. CMIIW.

BTW, Zope has interfaces. Not sure if it's exactly the same.

Regards,


Bj?rn

-- 
BOFH excuse #424:

operation failed because: there is no message for this error (#1014)



From jgnmello at gmail.com  Sat May 31 01:12:01 2008
From: jgnmello at gmail.com (=?ISO-8859-1?Q?Jo=E3o_Mello?=)
Date: Sat, 31 May 2008 02:12:01 -0300
Subject: mod_python + apache at windows
Message-ID: <4af2c4970805302212s6903fdb1v817cf6395de9f085@mail.gmail.com>

Hi...
Ane one can give me an example to install mod_python in apache at windows?

Hug,
Mello.
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From deets at nospam.web.de  Tue May 13 16:16:52 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 22:16:52 +0200
Subject: built in list generator?
In-Reply-To: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
References: <a594cb3e-e528-4d4e-9d58-090d01b42a44@m45g2000hsb.googlegroups.com>
Message-ID: <68uba1F2ur7lkU1@mid.uni-berlin.de>

globalrev schrieb:
> if i want  a list with all numbers between x and y is there a way to
> do this with an inbult function.
> 
> i mean i can always construct a function to do this but is there
> soemthing like:
> 
> nbrs = list(range(50,100, 2))

range *does* that. use xrange if all you want is to iterate.

Diez


From darcy at druid.net  Tue May 13 13:32:51 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Tue, 13 May 2008 13:32:51 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
Message-ID: <20080513133251.2c2d9537.darcy@druid.net>

On Tue, 13 May 2008 19:57:10 +0300
"Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
> Not everybody has grown in English-speaking community, you know. And
> knowing math quite good, I prefer writing "x = y" instead of "Set x to
> y".

OMG!  It's COBOL.

Wasn't there an aborted attempt at writing a language based on English
back in the sixties or seventies?  I seem to recall that it failed
mainly because it turns out that programmers don't like to speak in
English, even when it is their first language, to describe computer
algorithms.  If that wasn't true then pseudocode would look a lot more
like English than it does.  In fact, pseudocode tends to look a lot
like Python.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From alitosis at gmail.com  Wed May  7 02:41:08 2008
From: alitosis at gmail.com (alito)
Date: Tue, 6 May 2008 23:41:08 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <0c999d92-e3e5-4f5c-b636-73739abd675a@1g2000prg.googlegroups.com>

On May 6, 7:19?pm, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
> ? TCP ? ?0.0.0.0:445 ? ? ? ? ? ?0.0.0.0:0 ? ? ? ? ? ? ?LISTENING
> ? UDP ? ?0.0.0.0:445 ? ? ? ? ? ?*:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
> ? TCP ? ?0.0.0.0:445 ? ? ? ? ? ?0.0.0.0:0 ? ? ? ? ? ? ?LISTENING
> ? UDP ? ?0.0.0.0:445 ? ? ? ? ? ?*:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find', ?'"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>
Get rid of the extra quotes.  ie:
p2 = Popen(['find',  '445'], stdin = p1.stdout, stdout = PIPE)

The quotes on the command line and on the os.system call are consumed
by the shell.  The program doesn't see them.


From goldnery at gmail.com  Thu May 29 18:41:29 2008
From: goldnery at gmail.com (Gandalf)
Date: Thu, 29 May 2008 15:41:29 -0700 (PDT)
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
Message-ID: <13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>

On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
> Gandalf wrote:
> > how do i write this code in order for python to understand it
> > and print me the x variable
>
> > x=1
> > def aaaa():
> >     x++
> >     if x > 1:
> >         print "wrong"
> >     else :
> >         print x
>
> > aaaa()
>
> Example:
>
> x=1
> def aaaa(x):
>     x += 1
>     if x > 1:
>         return "wrong"
>     else :
>        return x
>
> print aaaa(x)
>
> John

mmm isn't their any global variable for functions?


From http  Wed May 28 15:51:22 2008
From: http (Paul Rubin)
Date: 28 May 2008 12:51:22 -0700
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
Message-ID: <7xr6bm2on9.fsf@ruckus.brouhaha.com>

Jerry Stuckle <jstucklex at attglobal.net> writes:
> A good OO programmer could easily write good functional code.

Over on #haskell there's a general belief that learning Haskell is
easier for nonprogrammers than it is for OO programmers, since the OO
programmers first have to unlearn what they previously knew.


From bj_666 at gmx.net  Mon May 26 18:08:10 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 26 May 2008 22:08:10 GMT
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com>
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com>
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com>
	<6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>
Message-ID: <6a0qmaF32hqrpU2@mid.uni-berlin.de>

On Mon, 26 May 2008 13:51:46 -0700, notnorwegian wrote:

> what im asking is can a highlevellanguage be written directly on top
> of the machine or a highlevellanguage is always written on top of a
> lowlevellanguage?

What do you mean by "directly on top of the machine"?  How do you want to
implement a language without using *another* language?  At the very lowest
level there's machine language.  And of course it is possible to implement
high level languages in machine language.  That's a lot of work and not
very portable of course.

Ciao,
	Marc 'BlackJack' Rintsch


From spamgrinder.trylater at ggmail.com  Thu May  1 10:56:45 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Thu, 01 May 2008 09:56:45 -0500
Subject: is +=1 thread safe
Message-ID: <4819DA2D.3030508@ggmail.com>

Hi,

I have a piece of software which uses threads in very massive way - like 
hundreds of  them generated every second.

there is also a piece of code which maintains the number of outstanding 
threads, simply

counter+=1 is executed when before starting the thread and counter-=1 
after it finishes.

all is very simple and by the end of the program life I expect the 
counter to zero out.

however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.

I guarded those statement with Lock.{acquire,release} and now it always 
returns 0.


But I still can not believe that +=1 is not a thread safe operation.


Any clue?

-- 

Andy


From gagsl-py2 at yahoo.com.ar  Mon May  5 18:44:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 19:44:30 -0300
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
	<mailman.571.1209966089.12834.python-list@python.org>
	<65a6be8e-d67f-4255-938a-fcfbfb8b4eb1@z16g2000prn.googlegroups.com>
Message-ID: <op.uapdggykx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 13:02:12 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> On May 4, 10:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Mon, 05 May 2008 00:33:12 -0300,skunkwerk<skunkw... at gmail.com> escribi?:
>>
>> > i'm redirecting the stdout & stderr of my python program to a log.
>> > Tests i've done on a simple program with print statements, etc. work
>> > fine.  however, in my actual program i get weird output like this:
>>
>> > 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
>> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
>> > if any
>> > 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
>>
>> Try this simplified example and see by yourself:
>>
>> import sys
>>
>> class Write2Log:
>>      def write(self, x):
>>          sys.__stdout__.write('[%s]' % x)
>>
>> sys.stdout = Write2Log()
>>
>> print "Hello world!"
>> age = 27
>> name = "John"
>> print "My name is", name, "and I am", age, "years old."
>
> thanks Gabriel,
>    i tried the code you sent and got output like the following:
> [My name is][][john][][and I am][][27][][years old.]
>
> it doesn't really help me though.  does this have any advantages over
> the syntax i was using?
> are there any limits on what kind of objects the logger can write?  ie
> ascii strings of any length?

The example doesn't use any logger, so loggers aren't the problem here, ok?

The write function above puts square brackets [] around anything it receives. This way you can see exactly how write() is called: once per *item* in the print statement, plus once per comma used (with an space character that you didn't copy correctly).

Back to your original code, you have to call logger.debug with a *line* of text, but you are calling it with many small pieces - that's the problem. Accumulate output until you see a '\n' - then join all the pieces into a single, complete line and finally call logger.debug

-- 
Gabriel Genellina



From nagle at animats.com  Thu May  1 11:40:05 2008
From: nagle at animats.com (John Nagle)
Date: Thu, 01 May 2008 08:40:05 -0700
Subject: is +=1 thread safe
In-Reply-To: <4819DA2D.3030508@ggmail.com>
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <4819e15e$0$34539$742ec2ed@news.sonic.net>

AlFire wrote:
> Hi,
> all is very simple and by the end of the program life I expect the 
> counter to zero out.
> 
> however I am getting values -1, -2, 1 ,2 ,3 and quite often 0 as expected.
> 
> I guarded those statement with Lock.{acquire,release} and now it always 
> returns 0.
> 
> 
> But I still can not believe that +=1 is not a thread safe operation.
> 
> 
> Any clue?

    "counter += 1" is not an atomic operation, apparently.  Sorry.

    However, appending and removing from a list or dict are atomic operations,
because if they were not, memory allocation would break.

						John Nagle


From devphyl at gmail.com  Sun May 11 06:05:08 2008
From: devphyl at gmail.com (alefajnie)
Date: Sun, 11 May 2008 03:05:08 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
Message-ID: <7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>

>
> try arr[2][3] instead.
>
> basically your version is trying to index an array with a tuple argument (2,3).
>
> --irmen


oh, you're right.

btw, is any simple way to create multi-dimension array ?
any built-in function ?


From zapwireDASHgroups at yahoo.com  Tue May 27 16:46:28 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Tue, 27 May 2008 13:46:28 -0700
Subject: Weird exception in my, um, exception class constructor
References: <G3__j.170784$fB7.29830@en-nntp-06.dc1.easynews.com>
	<m2wslf4haq.fsf@googlemail.com>
Message-ID: <Kq__j.177027$ng7.15947@en-nntp-05.dc1.easynews.com>

Hi Arnaud,

"Arnaud Delobelle" <arnodel at googlemail.com> wrote in message 
news:m2wslf4haq.fsf at googlemail.com...
> That's because the class 'Exception' defines a descriptor 'args' which
> has to be a sequence.

Ah, thanks.  I was following the example in Beazley's book and should have dug 
into the actual documentation a bit more.

> OTOH you could just take advantage of Exception.args:
>>>> class MyError(Exception): pass

Sounds good to me.  I take it that, if I don't inherit from Exception, various 
expected behaviors will break?  (This is what Beazley suggests...)

---Joel




From pavel.uvarov at gmail.com  Fri May 30 16:40:13 2008
From: pavel.uvarov at gmail.com (pavel.uvarov at gmail.com)
Date: Fri, 30 May 2008 13:40:13 -0700 (PDT)
Subject: ThreadPoolingMixIn
Message-ID: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>

Hi, everybody!

I wrote a useful class ThreadPoolingMixIn which can be used to create
fast thread-based servers. This mix-in works much faster than
ThreadingMixIn because it doesn't create a new thread on each request.

Is it worth including in SocketServer.py?


from __future__ import with_statement
from SocketServer import ThreadingMixIn
import threading
import Queue
class ThreadPoolingMixIn(ThreadingMixIn):
    """Mix-in class to handle requests in a thread
pool.

    The pool grows and thrinks depending on
load.

    For instance, a threading UDP server class is created as
follows:

    class ThreadPoolingUDPServer(ThreadPoolingMixIn, UDPServer):
pass

    """
    __author__ = 'Pavel Uvarov <pavel.uvarov at gmail.com>'

    def init_thread_pool(self, min_workers = 5,
                         max_workers = 100, min_spare_workers = 5):
        """Initialize thread pool."""
        self.q = Queue.Queue()
        self.min_workers = min_workers
        self.max_workers = max_workers
        self.min_spare_workers = min_spare_workers
        self.num_workers = 0
        self.num_busy_workers = 0
        self.workers_mutex = threading.Lock()
        self.start_workers(self.min_workers)

    def start_workers(self, n):
        """Start n workers."""
        for i in xrange(n):
            t = threading.Thread(target = self.worker)
            t.setDaemon(True)
            t.start()

    def worker(self):
        """A function of a working
thread.

        It gets a request from queue (blocking if
there
        are no requests) and processes
it.

        After processing it checks how many spare
workers
        are there now and if this value is greater
than
        self.min_spare_workers then the worker
exits.
        Otherwise it loops
infinitely.

        """
        with self.workers_mutex:
            self.num_workers += 1
        while True:
            (request, client_address) = self.q.get()
            with self.workers_mutex:
                self.num_busy_workers += 1
            self.process_request_thread(request, client_address)
            self.q.task_done()
            with self.workers_mutex:
                self.num_busy_workers -= 1
                if self.num_workers - self.num_busy_workers > \
                        self.min_spare_workers:
                    self.num_workers -= 1
                    return

    def process_request(self, request, client_address):
        """Puts a request into
queue.

        If the queue size is too large, it adds extra
worker.

        """
        self.q.put((request, client_address))
        with self.workers_mutex:
            if self.q.qsize() > 3 and self.num_workers <
self.max_workers:
                self.start_workers(1)

    def join(self):
        """Wait for all busy threads"""
        self.q.join()


From vinay_sajip at yahoo.co.uk  Thu May 29 13:28:24 2008
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Thu, 29 May 2008 10:28:24 -0700 (PDT)
Subject: Custom log handler and logging.config.fileConfig()
References: <mailman.1700.1212008047.12834.python-list@python.org> 
	<72799b9c-bf89-4c50-9e9a-30f0f5a895dd@i76g2000hsf.googlegroups.com> 
	<mailman.1739.1212072832.12834.python-list@python.org>
Message-ID: <ce1bb584-9551-4b6d-93ca-8788013fb2f0@k37g2000hsf.googlegroups.com>

On 29 May, 15:53, "Lowell Alleman" <low... at allemansonline.com> wrote:
> Is there any reason not to do this assignment in the "myhandler.py"
> directly?  This would save a step for each application that needs to
> use it.
>
> Starting from your example, it would now look like this:
>
> # -- myhandler.py ---
> importlogging.handlers
>
> class MySpecialHandler(logging.handlers.RotatingFileHandler):
>     def __init__(self, fn):
>        logging.handlers.RotatingFileHandler.__init__(self, fn,
>            maxBytes=2000, backupCount=3)
>
> # Register handler in the "logging.handlers" namespacelogging.handlers.MySpecialHandler = MySpecialHandler
>
> # -- app.py ---
> importlogging.handlers,logging.config
> import myhandler
>
> logging.config.fileConfig("logging.ini")
> ...

Doing it the way you suggest should be fine.

Regards,

Vinay Sajip


From paul.hankin at gmail.com  Wed May 21 02:47:14 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 23:47:14 -0700 (PDT)
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
	<mailman.1385.1211299351.12834.python-list@python.org>
Message-ID: <9d9dadfe-3f91-44a6-8b1b-50fe8003046d@e39g2000hsf.googlegroups.com>

On May 20, 5:02?pm, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script

'filter' returns a string if it's argument is a string, so works
nicely here.

def cleanup(s):
    return filter(lambda x: x not in ' -', s)

--
Paul Hankin


From rschroev_nospam_ml at fastmail.fm  Mon May 12 03:15:36 2008
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 12 May 2008 09:15:36 +0200
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <4827bda2$0$11606$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net>
Message-ID: <r8SVj.6441$KQ4.1555@newsfe10.ams2>

John Salerno schreef:
> Ben Finney wrote:
> 
>> John Salerno <johnjsal at gmailNOSPAM.com> writes:
>>
>>> num = 33
>>>
>>> for x in xrange(10):
>>>     print num += 1
>> Which is better done by 'num += 10'.
>>
>> Can you come up with an example that isn't trivially replaced with
>> clearer code? That might make it clearer what your concern is.
> 
> ::sigh:: No, unfortunately I don't have a strong enough grasp of Python
> to give a really in-depth example. I understand what you're asking
> though. Perhaps people don't use this idiom as much as I think they do,
> so to give a trivial example to support my point isn't helpful.

Perhaps a function to print some text a number of times:

def print_n(text, n):
   for i in xrange(n):
     print text

(Though I guess you can replace that with print '\n'.join(msg * n) )

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 12:30:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 18:30:35 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
	<48340938$0$10773$426a74cc@news.free.fr>
	<e6aa9788-f2b9-4d7b-93e9-88b412f5773a@w1g2000prd.googlegroups.com>
Message-ID: <483c3729$0$10892$426a74cc@news.free.fr>

Simon Forman a ?crit :
> On May 21, 4:36 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> Simon Forman a ?crit :
(snip)
>>> If order is important, you can use sorted() instead of list() like so:
>>> def compress(s):
>>>     new = sorted(set(s), key=s.index)
>>>     return return ''.join(new)
>> This won't still preserve the *original* order.
> 
> 
> I don't understand.
> 
> new will contain each unique item in s, sorted in order of the items'
> first occurance in s, right?

Yep. Answered too fast, missed the key param. Sorry.



From jonbutler88 at googlemail.com  Wed May 21 04:18:00 2008
From: jonbutler88 at googlemail.com (jonbutler88 at googlemail.com)
Date: Wed, 21 May 2008 01:18:00 -0700 (PDT)
Subject: HTMLParser error
Message-ID: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>

Just writing a simple website spider in python, keep getting these
errors, not sure what to do. The problem seems to be in the feed()
function of htmlparser.

Traceback (most recent call last):
  File "spider.py", line 38, in <module>
    s.crawl(site)
  File "spider.py", line 30, in crawl
    self.parse(url)
  File "spider.py", line 21, in parse
    self.feed(urlopen('http://' + page).read())
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/HTMLParser.py", line 107, in feed
    self.rawdata = self.rawdata + data
AttributeError: Spider instance has no attribute 'rawdata'

Any ideas of how to fix this? Im using python 2.5.2 on mac osx


From paul at subsignal.org  Thu May 29 09:45:59 2008
From: paul at subsignal.org (paul)
Date: Thu, 29 May 2008 15:45:59 +0200
Subject: Any way to loop through object variables?
In-Reply-To: <483E8C2B.4050700@ecs.soton.ac.uk>
References: <483D7A47.3030606@ecs.soton.ac.uk>	<483D8614.7000808@islandtraining.com>	<7695C97A-008C-46A1-A872-1E8F73A560B4@ideadevice.com>
	<483E8C2B.4050700@ecs.soton.ac.uk>
Message-ID: <g1mc2l$1ro$1@ger.gmane.org>

Dave Challis schrieb:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Ah thanks, vars(...) was exactly what I was after.  I'd come across
> dir() before, but this returns more than I need.
It seems vars() misses class attributes tho...

cheers
  Paul



From ivan.illarionov at gmail.com  Tue May 27 22:06:00 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 02:06:00 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>
Message-ID: <g1iem8$r5$3@news.mtu.ru>

On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>> 
>>> Greetings, Ivan Illarionov.
>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>
>>>>> As I've said before - good programmers can write good code in any
>>>>> language.
>>>> Yes, they can. But it may be harder to do for them in one language
>>>> and easier in another.
>>> It's obvious lie. If you have clear mind and you know language you're
>>> using, there are absolutely NOTHING can deny you to write clear code.
>>> Even using forth postfix notation, I have no problem writing good
>>> code, it's as easy as writing bad code. And yes, I do see the
>>> difference.
>> 
>> No. Language does matter.
> 
> Not for a good programmer.  Only for half-assed ones.

No. Language does matter


From jstucklex at attglobal.net  Sun May 25 14:15:57 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 14:15:57 -0400
Subject: php vs python
In-Reply-To: <37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
Message-ID: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>

Lie wrote:
> On May 22, 12:28 pm, NC <n... at iname.com> wrote:
>> On May 21, 1:10 pm, notbob <not... at nothome.com> wrote:
>>
>>
>>
>>> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.
>>> Yet, I want learn the guts of it instead of just booting up some
>>> wordwank or whatever.
>> Here's a simple computation to consider...  WordPress' codebase is
>> approximately a megabyte of PHP code and megabyte of JavaScript code.
>> Assuming that the average line of that code is 50 characters long, you
>> are looking at 20,000 lines of code in PHP and as many in JavaScript.
>> Based on the notion that the average developer out there writes 100
>> lines a day, either you're in for a two-year project or your product
>> is going to have seriously reduced functionality compared to something
>> that's been freely available for years.  What's your choice?
> 
> Nope, the core functionality of a blogging software could be
> replicated in just a few lines of PHP codes, in the range of tens to
> hundreds of lines. If you're creating your own blogging software, you
> wouldn't seriously think you'd recreate all those things such as
> pingbacks, commenting system, etc, etc, etc. No, you'd start with some
> basic core functionalities: a few simple server side includes only.

As he said - it's either a two man-year project or your product is going 
to have seriously reduced functionality.  It looks like you are opting 
for the latter.

Also, you still need to write the server-side includes.  But they won't 
do nearly enough for everything WordPress does.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From d3vvnull at gmail.com  Thu May  8 08:11:56 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Thu, 8 May 2008 07:11:56 -0500
Subject: python equivalent to perl's inplace edit mechanism
Message-ID: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>

Does python have an equivalent to Perl's inplace-edit variable $^I?
For example, the following perl code below changes mike to dave in a file
that is passed as an argument.

#!/usr/bin/env perl
#chgit script
$^I = '';
while(<>) {
  s/mike/dave/g;
  print;
}

The script would be used as below:
chgit somefile

Afterward, all instances of mike are changed to dave.

Thanks.

Mike

-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From python at rcn.com  Thu May 29 02:45:33 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 28 May 2008 23:45:33 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
References: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>
Message-ID: <34a8567f-4aeb-41a8-890a-b9980ed57012@j33g2000pri.googlegroups.com>

On May 28, 4:41?pm, blaine <frik... at gmail.com> wrote:
> 1. ?Whats a good way to get the keys? I'm using a loop with
> random.choice() at the moment.

Why not keep a separate list of keys and use random.sample()?


Raymond


From ivan.illarionov at gmail.com  Thu May 15 00:17:21 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 15 May 2008 04:17:21 +0000 (UTC)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <g0gdgg$1dio$1@news.mtu.ru>

On Wed, 14 May 2008 09:21:10 -0700, vbgunz wrote:
> [...] 
> when you see
> one, what is the first thing that comes to mind? When you write one,
> what was the first thing on your mind? Other than "similar to static-
> methods", at what point will you be glad you used one? To sum it up,
> what is the best role for a class-method that does not turn your work
> into code-soup?

The first thing on my mind when I see a classmethod is that I may need a 
metaclass here.

class A(object):
    @classmethod
    def do_something_with_aclass(cls):
        pass

    @classmethod
    def do_something_diffferent_with_aclass(cls):
        pass

    def do_something(self):
        pass

is similar to:

class M(type):
    def do_something_with_aclass(cls):
        pass
    
    def do_something_diffferent_with_aclass(cls):
        pass

class A:
    __metaclass__ = M
    
    def do_something(self):
        pass

-- Ivan


From cokofreedom at gmail.com  Tue May  6 07:16:55 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 04:16:55 -0700 (PDT)
Subject: computing with characters
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl> 
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org> 
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org> 
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de> 
	<Xns9A90773D0D544duncanbooth@127.0.0.1> <4820319a_7@news.bluewin.ch>
Message-ID: <8f1293e5-26f7-4183-acd4-47fd6eda931a@l42g2000hsc.googlegroups.com>

On May 6, 12:22 pm, Boris Borcic <bbor... at gmail.com> wrote:
> Duncan Booth wrote:
> > Torsten Bronger <bron... at physik.rwth-aachen.de> wrote:
>
> >> The biggest ugliness though is ",".join().  No idea why this should
> >> be better than join(list, separator=" ").  Besides, ",".join(u"x")
> >> yields an unicode object.  This is confusing (but will probably go
> >> away with Python 3).
>
> > It is only ugly because you aren't used to seeing method calls on string
> > literals.
>
> An obviously independent cause of uglyness is the inconsistency of eg
> ','.split() and ','.join()
>
> Cheers, BB

I tend to do ", ".join("%s" % e for e in item)

Is there any difference between this and str()?


From smallfish2007 at gmail.com  Fri May 30 02:45:24 2008
From: smallfish2007 at gmail.com (smalfish)
Date: Thu, 29 May 2008 23:45:24 -0700 (PDT)
Subject: some question with Quixote and Nginx
Message-ID: <4559cbb5-30e1-465a-b2be-56920005a16b@d19g2000prm.googlegroups.com>

hi,
  i have some question with this,quixote publish width FastCGI.the two
scripts like this(root.ptl and hello.ptl):

class RootDirectory(Directory):
    _q_exports = ["", "hello"]

    def _q_index [html] (self):
        """
        <h4>Hello,Blog</h4>
        <li><a href="hello/">hello</a></li>
        """
    hello = HelloDirectory()

class HelloDirectory(Directory):
    _q_exports = ["", "hi"]

    def _q_index [html] (self):
        """
        <h4>hello page</h4>
        <li><a href="/">back home</a></li>
        """

    def hi [html] (self):
        """
        aaaaaaaaaaa
        """

now, on the firefox input:
http://localhost/hello/  --> this ok
http://localhost/hello  --> this will forward http://localhost/hello/hello/
, error.

other:
http://localhost/hello/hi  --> this ok
http://localhost/hello/hi/ --> http://localhost/hello/hi//hello/hi/

i think,some problem with Nginx(PATH_INFO is not correct.)

==================================
nginx.conf:
location / {
     fastcgi_pass 127.0.0.1:8000;
     fastcgi_param SERVER_NAME nginx;
     fastcgi_param PATH_INFO $request_uri;
     fastcgi_param SCRIPT_NAME $fastcgi_script_name;
     fastcgi_param REQUEST_METHOD $request_method;
     fastcgi_param QUERY_STRING $query_string;
     fastcgi_param CONTENT_TYPE $content_type;
     fastcgi_param CONTENT_LENGTH $content_length;
     fastcgi_intercept_errors off;
}

fastcgi:
spawn-fcgi -a 127.0.0.1 -p 8000 -f fastcgi_server.py -u nginx -P /var/
log/nginx/qfcgi.pid


thanks!


From s0suk3 at gmail.com  Tue May 20 11:50:04 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 08:50:04 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>

On May 20, 9:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
> On May 20, 8:13 am, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > I posted this code last night in response to another thread, and after I
> > posted it I got to wondering if I had misused the list comprehension. Here's
> > the two examples:
>
> > Example 1:
> > --------------------
> > def compress(s):
> >     new = []
>
> >     for c in s:
> >         if c not in new:
> >             new.append(c)
> >     return ''.join(new)
> > ----------------------
>
> > Example 2:
> > ------------------------
> > def compress(s):
> >     new = []
> >     [new.append(c) for c in s if c not in new]
> >     return ''.join(new)
> > --------------------------
>
> > In example 1, the intention to make an in-place change is explicit, and it's
> > being used as everyone expects it to be used. In example 2, however, I began
> > to think this might be an abuse of list comprehensions, because I'm not
> > assigning the result to anything (nor am I even using the result in any
> > way).
>
> > What does everyone think about this? Should list comprehensions be used this
> > way, or should they only be used to actually create a new list that will
> > then be assigned to a variable/returned/etc.?
>
> Why not make the list comp the actual list you are trying to build?
>
> def compress(s):
>     seen = set()
>     new = [c for c in s if c not in seen and (seen.add(c) or True)]
>     return ''.join(new)
>
> or just:
>
> def compress(s):
>     seen = set()
>     return ''.join(c for c in s if c not in seen and (seen.add(c) or
> True))
>
> Using the set also gets rid of that nasty quadratic performance
> thingy.

You don't need all those conditionals. A set differs from a list
precisely in the fact that each element is unique. And since the
function is expecting "s" to be an iterable object, it can be
constructed even without a for loop:

def compress(s):
    return list(set(s))

That does the trick.


From gagsl-py2 at yahoo.com.ar  Sun May  4 20:02:01 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 21:02:01 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org>
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
Message-ID: <op.uanmdnsrx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 08:11:35 -0300, <castironpi at gmail.com> escribi?:

> On May 4, 12:21?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribi?:
>>
>> > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>>
>> >> I'm actually curious if there's a way to write a generator function
>> >> (not a generator expression) in C, or what the simplest way to do it
>> >> is... besides link the Python run-time.
>>
>> > The reference implementation of Python is written in C, so obviously there
>> > must be a way to write something like generators in C.
>>
>> Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
>> See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Gabriel,
> How did your attempt turn out from last May?  At first look, it's
> outside the scope of Python, but it is not the scope of C
> necessarily.  Generators offer a lot of simplicity (which I haven't
> read about extensively, but am starting to see) that could gain some
> reputation for Python.  What is the midpoint at which C could meet
> Python?
>
> There is no such thing as a 'frame' per se in C; byte code is
> integral.  As there is no such thing as suspended state without
> frames, and no such thing as generators without suspended state.  It's
> a hard thing to Google for without knowing the prior terminology for
> the work that's already been done on them in C.  What work is there?
> Are any devs interested in pursuing it?

The frame and generator implementations are very tightly coupled to Python code, they aren't useful for implementing generators in C. Don't bother to read them.

Unfortunately, converting a C function into something like a generator isn't as easy as using the "yield" statement... Although the idea is simple, the implementation may be hard sometimes: You have to wrap the function within an object, maintain all state information into that object, and do all computation in the "next" method. Also, __iter__ should return itself so it can be called as an iterator.
(those objects are sometimes called "functors" <http://en.wikipedia.org/wiki/Function_object> not the same meaning as functors in Mathematics)

All examples that I have at hand are propietary code so I can't post them. The itertools module may be used as reference - "cycle" and "chain" are the easiest I think, although they might be *too* easy to understand the structure. "groupby" is a more complex example but at the same time harder to understand. See http://svn.python.org/projects/python/trunk/Modules/itertoolsmodule.c

Ok, I'll try to use Python code as an example. A generator for Fibonacci numbers:

def fibo():
     a = b = 1
     while True:
         a, b = b, a+b
         yield b

We can convert that function into this object; it should be written in C, not Python, but the idea is the same:

class fibo:
     def __init__(self):
         self.a = 1
         self.b = 1
     def next(self):
         temp = self.a + self.b
         self.a = self.b
         self.b = temp
         return temp
     def __iter__(self):
         return self

It behaves exactly the same as the generator above; we can even use the same code to test it:

py> for n in fibo():
...   if n>100: break
...   print n
...
2
3
5
8
13
21
34
55
89

Converting that class into C code should be straightforward. And then you have a generator-like function written in C.

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Tue May 20 12:22:29 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 09:22:29 -0700 (PDT)
Subject: Removing Space and "-" from a string
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
	<mailman.1385.1211299351.12834.python-list@python.org>
Message-ID: <93123e81-2b7f-43c9-bc1c-74d80f83cae5@d1g2000hsg.googlegroups.com>

On May 20, 11:02 am, "Ahmed, Shakir" <shah... at sfwmd.gov> wrote:
> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script
>
> Any help is highly appreciated.

string.replace('-', '').replace(' ', '')


From skanemupp at yahoo.se  Sat May 10 21:12:37 2008
From: skanemupp at yahoo.se (globalrev)
Date: Sat, 10 May 2008 18:12:37 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
Message-ID: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>

http://reddit.com/r/programming/info/18td4/comments

claims people take a lot of time to write a simple program like this:


"Write a program that prints the numbers from 1 to 100. But for
multiples of three print "Fizz" instead of the number and for the
multiples of five print "Buzz". For numbers which are multiples of
both three and five print "FizzBuzz".

for i in range(1,101):
    if i%3 == 0 and i%5 != 0:
        print "Fizz"
    elif i%5 == 0 and i%3 != 0:
        print "Buzz"
    elif i%5 == 0 and i%3 == 0:
        print "FizzBuzz"
    else:
        print i


is there a better way than my solution? is mine ok?


From wuwei23 at gmail.com  Thu May 29 20:00:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 29 May 2008 17:00:19 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
	<4c2b01e4-10b3-455d-a29e-bc5bb31a8264@59g2000hsb.googlegroups.com>
Message-ID: <3ef14f41-2b87-4917-bf9e-4663946b28d1@d19g2000prm.googlegroups.com>

On May 30, 9:50 am, p... at ulkarodgers.com wrote:
> Have you shown this stuff to the google AppEngine folks!
> Thats being touted as the thing that'll make web-2 easy
> App-Engine has the persistence, and the integration, its missing the
> others and without them it'll never be great.

Google App Engine is _only_ focused on providing a framework for
scaleable apps, the GUI end is left entirely up to the developer (and
really _shouldn't_ be integrated at that level, IMO).

There's nothing preventing you from building something on top of GAE
that does what you want; using their AJAX Libraries API is a good
place to start: http://code.google.com/apis/ajaxlibs/


From __peter__ at web.de  Thu May 29 06:36:49 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 May 2008 12:36:49 +0200
Subject: Error: Cannot convert Decimal("0.0000") to Decimal
References: <32b8c8c0-e567-477f-9495-56e38ec2b2c1@e53g2000hsa.googlegroups.com>
Message-ID: <g1m0vv$fih$03$1@news.t-online.com>

Vitaliy wrote:

> I got this wired exception periodically (Python 2.5, Django based
> application)
> what does it mean ?

A reload() maybe?

>>> import decimal
>>> d = decimal.Decimal()
>>> reload(decimal)
<module 'decimal' from '/usr/lib/python2.5/decimal.pyc'>
>>> decimal.Decimal(d)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/decimal.py", line 617, in __new__
    raise TypeError("Cannot convert %r to Decimal" % value)
TypeError: Cannot convert Decimal("0") to Decimal

Peter


From ricaraoz at gmail.com  Mon May 12 10:03:08 2008
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Mon, 12 May 2008 11:03:08 -0300
Subject: python vs. grep
In-Reply-To: <7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>	<mailman.679.1210109656.12834.python-list@python.org>	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
Message-ID: <48284E1C.5050107@bigfoot.com>

Ville Vainio wrote:
> On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> 
>> All these examples assume your regular expression will not span multiple
>> lines, but this can easily be the case. How would you process the file
>> with regular expressions that span multiple lines?
> 
> re.findall/ finditer, as I said earlier.
> 

Hi, sorry took so long to answer. Too much work.

findall/finditer do not address the issue, they merely find ALL the 
matches in a STRING. But if you keep reading the files a line at a time 
(as most examples given in this thread do) then you are STILL in trouble 
when a regular expression spans multiple lines.
The easy/simple (too easy/simple?) way I see out of it is to read THE 
WHOLE file into memory and don't worry. But what if the file is too 
heavy? So I was wondering if there is any other way out of it. Does grep 
read the whole file into memory? Does it ONLY process a line at a time?



From nkarkhan at gmail.com  Thu May 29 15:09:26 2008
From: nkarkhan at gmail.com (nkarkhan)
Date: Thu, 29 May 2008 12:09:26 -0700 (PDT)
Subject: Remote Debugging for python.
Message-ID: <f645e118-98bd-482d-93ec-754e9dec4cb4@k30g2000hse.googlegroups.com>

Newbie to python here..so bear with me.

I used to be able to gdb to a target machine running c/c++ code and
see where my program was hanging, crashing, executing..

How do I do that with python?
I have multi-threaded python programs running on a remote machine. I
want to se where they are at any instance.

If remote debugging is too much to ask for.. what about local
debugging?
Can i break into an executing program and see at source-level where my
pyhton program/process/thread is at?

Thank you,
Nitin.


From agustin.villena at gmail.com  Mon May 19 09:54:05 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Mon, 19 May 2008 06:54:05 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
Message-ID: <0043b6d6-3e4c-4efc-a02e-5eb2c84fa009@k37g2000hsf.googlegroups.com>

On May 18, 4:31 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Agustin Villena schrieb:
>
>
>
> > Hi!
>
> > is there anyway to show the class of amethodin an exception's
> > traceback?
>
> > For example, the next code
>
> > class Some(object):
> >     def foo(self,x):
> >         raise Exception(x)
>
> > obj = Some()
> > obj.foo("some arg")
>
> > produces the next traceback
>
> > Traceback (most recent call last):
> >   File "<string>", line 231, in run_nodebug
> >   File "G:\dev\exceptions\sample.py", line 7, in <module>
> >     obj.foo("some arg")
> >   File "G:\dev\exceptions\sample.py", line 3, in foo
> >     raise Exception(x)
> > Exception: some arg
>
> > I want to improve the line
> > File "G:\dev\exceptions\sample.py", line 3, in foo
>
> > to
> > File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>
> > Is this improvement feasible
>
> It should be. You can get a dictionary of the locals of an exception
> stack frame, of which you could extract the self-parameter's class.
>
> Diez

Hi!

I digged on sys.exc_info() object and the traceback module and I
could't figure how I can get the locals() of the exception stackframe

Any advice?

Thanks
  Agustin


From hat at se-162.se.wtb.tue.nl  Tue May 27 04:55:24 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 27 May 2008 10:55:24 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>

On 2008-05-27, Alex Gusarov <alex.m.gusarov at gmail.com> wrote:
> Hello, I have strong .NET background with C# and want to do some
> familiar things from it with Python, but don't know how. For example,
> I created form in qt designer with QCalendarWidget, translated it into
> Python module and want to overload virtual method paintCell of
> QCalendarWidget. In C# I can write following (abstract) code:
>
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
>
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }

Not sure what you are doing here precisely, as I have no knowledge at all in
C#. It may be useful to explain in words what you intend to do.

> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's
> long and I must create additional class). The only thing I done its

It is going to be long in both cases, assuming you code the same functionality.
Why are you so worried about 5 lines of code (for making a new class)?


> full replacement of handler:
>
> calendar.paintCell = myPaintCell
>
> def myPaintCell(self):
>     pass
>
> Operator += don't work with methods. So, I can't add handler or call
> standart handler from my (infinite recursion, cause my handler
> replaced standart)

Yes you can, prefix with the class name, as in

def myPaintCell(self):
    PaintCell.paintcell(self) # Call base class
    pass

> Please, give me some advice, I know Python must be good enough to do
> such things fast and elegant.

In my view, 'elegant' would be to derive a new class:

class MyPaintCell(PaintCell):
    def paintcell(self):
        PaintCell.paintcell(self)
        myPaintCell(self)

(hmm, only 4 lines, I overestimated the cost. Sorry)

Sincerely,
Albert


From zaka3enator at gmail.com  Mon May  5 10:49:56 2008
From: zaka3enator at gmail.com (Zaka)
Date: Mon, 5 May 2008 07:49:56 -0700 (PDT)
Subject: Pygame and PGU
References: <1eb8b83f-cca0-464a-9ec9-4f3722423afd@r66g2000hsg.googlegroups.com>
	<688ktbF2rlolmU1@mid.uni-berlin.de>
Message-ID: <9784ac77-4984-4f1b-b473-2c027b29979d@24g2000hsh.googlegroups.com>

On 5 Maj, 16:45, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Zaka wrote:
> > Hi. I need some help to make map system in PGU. For exmple we have 2
> > maps and when we leave first we enter to second.
>
> > --------------------
> >                    !
>
> > ___________
>
> What is a PGU? What is a map-system? And what is that ascii art above?
>
> And what might you learn from reading this:
>
> http://www.catb.org/~esr/faqs/smart-questions.html
>
> Diez

PGU is http://www.imitationpickles.org/pgu/wiki/index

Meaby this is not map-system but map changer like in RPG game


From hongyuan1306 at gmail.com  Mon May  5 23:52:10 2008
From: hongyuan1306 at gmail.com (Yuan HOng)
Date: Tue, 6 May 2008 11:52:10 +0800
Subject: Decimal vs Float comparasion
Message-ID: <91320d220805052052r56b61880v2cfb46ff89e605be@mail.gmail.com>

Hi,

It seems decimal object will always be larger than float in
comparasion, which goes against common sense:

>>> from decimal import Decimal
>>> a = Decimal('0.5')
>>> a > 99999
False
>>> a > 99999.0
True

It seems to me that rather than allowing this to happen, comparasion
between the two should either be made correct (by convertion decimal
to float e.g.) or forbidden, like arithmatic operations between the
two types.

-- 
Hong Yuan

?????????
???????????
http://www.homemaster.cn

From john106henry at hotmail.com  Tue May 13 16:36:41 2008
From: john106henry at hotmail.com (John Henry)
Date: Tue, 13 May 2008 13:36:41 -0700 (PDT)
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
Message-ID: <e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>

On May 13, 1:18 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> John Henry schrieb:
>
> > Hi list,
>
> > I can't understand this.  The following import statement works fine:
>
> >     from PythonCard.templates.dialogs import runOptionsDialog
>
> > but this one fails:
>
> >     from PythonCard.tools.codeEditor.codeEditor import CodeEditor
>
> > I've checked and rechecked to make sure that the spellings are proper
> > and that the tools, the codeEditor directory, and codeEditor.py, and
> > the class CodeEditor all exists and yet idle keep complaining that it
> > can't import from PythonCard.tools.
>
> How do these complaints *look* - we can't read your mind nor your
> screen, as you might imagine....
>
> > What's going on?  (Running Python2.5 under WinXP).
>
> What do you think is more probable - pythons import-mechanism, the
> foundation of nearly all libraries, is broken - or you make a mistake?
>
> Diez

Thumper's dad always told him:  If you don't have anything nice/useful/
garbage to say, then don't say noth'ng at all.

Next.


From rishab at students.iiit.ac.in  Wed May  7 02:15:02 2008
From: rishab at students.iiit.ac.in (rishab at students.iiit.ac.in)
Date: Wed, 7 May 2008 11:45:02 +0530 (IST)
Subject: loading folder list from my mailbox in python
Message-ID: <47066.124.123.160.204.1210140902.squirrel@students.iiit.ac.in>

Hey everyone,
I want to print the folder list of my mailbox using python (IMAP4), and
with hierarchy, i.e. it should print all the names of the folders of my
mailbox and the folders within them.
Can anyone please help me with this.




From xng at xs4all.nl  Thu May  8 03:17:49 2008
From: xng at xs4all.nl (Martin P. Hellwig)
Date: Thu, 08 May 2008 09:17:49 +0200
Subject: python newbie: some surprises
In-Reply-To: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <4822aa07$0$2016$e4fe514c@dreader28.news.xs4all.nl>

v4vijayakumar wrote:
> When I started coding in python, these two things surprised me.
> 
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.
> 
Even the standard editor Idle tries to guess the intendation, so this 
was never a problem for me. Though these days I use PyDev a lot.

> 2. python requires to pass "self" to all instance methods
A lot of editors help you with these 'unnecessary' things by 
auto-completion might be worth looking into one.
> 
> and I missed ":" often. :)
Still do after 5 years of python abuse :-)

-- 
mph


From mal at egenix.com  Tue May  6 04:28:20 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 10:28:20 +0200
Subject: psycopg2 ReferenceManual
In-Reply-To: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
References: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
Message-ID: <482016A4.90003@egenix.com>

On 2008-04-30 16:52, David Anderson wrote:
> Hi all, where can I find the reference manual from the psycopg2 or the
> dbapi2.0 because in their official pages I could'nt find

The Python DB-API 2.0 is defined in the PEP 249:

http://www.python.org/dev/peps/pep-0249/

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From wuwei23 at gmail.com  Wed May 14 22:56:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 14 May 2008 19:56:15 -0700 (PDT)
Subject: Passing functions around and executing
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
Message-ID: <db5e55ac-5e91-40c8-8bdb-e573436a986c@l17g2000pri.googlegroups.com>

On May 15, 10:53 am, PatrickMinnesota <PatrickMinnes... at gmail.com>
wrote:
> I have a bunch of functions.  I want to put them in a list.  Then I
> want to pass that list into another function which does some setup and
> then loops through the list of passed in functions and executes them.
> Some of them need arguments passed in too.

Hey Patrick,

Is something like the following helpful?

>>> def fn1(): print 'fn1'
>>> def fn2(): print 'fn2'
>>> fn_list = [fn1, fn2]
>>> def process(fn_seq):
...     # do set up here
...     for fn in fn_list:
...         fn()

>>> process(fn_list)
fn1
fn2

The easiest way to extend this for optional argument passing would be
to have each function accept keyword arguments, and then to pass a
dictionary of arguments in to each:

>>> def fn1(**kwargs): print 'fn1'
>>> def fn2(**kwargs): print 'fn2: x=%(x)s' % kwargs
>>> fn_list = [fn1, fn2]
>>> def process(fn_seq):
...     x = 'hello'
...     for fn in fn_list:
...         fn(**locals())

>>> process(fn_list)
fn1
fn2: x=hello

You could replace 'process' with a list comprehension:

>>> args = dict(x='hello again')
>>> results = [f(**args) for f in fn_list]
fn1
fn2: x=hello again

Or use 'map':

>>> process = lambda f: f(**args)
>>> results = map(process, fn_list)
fn1
fn2: x=hello again

Sorry, I'm a little bored.

- alex23


From tjreedy at udel.edu  Sun May  4 23:24:13 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 4 May 2008 23:24:13 -0400
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com><684r62F2rmn3gU2@mid.uni-berlin.de><mailman.513.1209878553.12834.python-list@python.org><dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com>
	<op.uanmdnsrx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <fvluks$thp$1@ger.gmane.org>

A 'generator function' -- a function that when called returns a generator 
object, a specific type of iterator,  is a rather Python specific concept. 
Better to think,  I think, in terms of writing an iterator 'class' (in C, 
struct with associated function).  Looking at the implementation of two of 
the itertools in the link below (previously posted), I could see the 
'template' that each was based on and that would be the basis for writing 
another.  (And I have not programmed C for a decade.  Raymond's code is 
quite clear.)

=================================
[Outlook Express does not 'quote' this post properly]

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.uanmdnsrx6zn5v at a98gizw.cpe.telecentro.net.ar...

 The itertools module may be used as reference - "cycle" and "chain" are 
the easiest I think, although they might be *too* easy to understand the 
structure. "groupby" is a more complex example but at the same time harder 
to understand. See 
http://svn.python.org/projects/python/trunk/Modules/itertoolsmodule.c

Ok, I'll try to use Python code as an example. A generator for Fibonacci 
numbers:

def fibo():
     a = b = 1
     while True:
         a, b = b, a+b
         yield b

We can convert that function into this object; it should be written in C, 
not Python, but the idea is the same:

class fibo:
     def __init__(self):
         self.a = 1
         self.b = 1
     def next(self):
         temp = self.a + self.b
         self.a = self.b
         self.b = temp
         return temp
     def __iter__(self):
         return self

=============================
Terry again: one can think of a generator function as an abbreviation of an 
iterator class.  Calling the gen. func. produces an iterator instance just 
like calling the class object.
=============================
[back to Gabriel]
It behaves exactly the same as the generator above; we can even use the 
same code to test it:

py> for n in fibo():
...   if n>100: break
...   print n
...
2
3
5
8
13
21
34
55
89

Converting that class into C code should be straightforward. And then you 
have a generator-like function written in C.

==================================





From exarkun at divmod.com  Mon May  5 13:38:13 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 May 2008 13:38:13 -0400
Subject: [Twisted-Python] Counting errors in a DeferredList and avoiding
	Unhandled error in Deferred messages
In-Reply-To: <18463.16271.516266.379803@jon.es>
Message-ID: <20080505173813.6859.2132215018.divmod.quotient.59119@ohm>

On Mon, 5 May 2008 19:10:39 +0200, Terry Jones <terry at jon.es> wrote:
>If I pass a list of deferreds to DeferredList and want to add a callback to
>the DeferredList to look at whatever errors have occurred in the underlying
>deferreds, should I do something like this:
>
>  deferreds = []
>  for x in whatever:
>    deferreds.append(funcReturningDeferred(x))
>
>  dl = DeferredList(deferreds)
>  dl.addCallback(errorCheckingFunc)
>
>  for d in deferreds:
>    d.addErrback(lambda _: pass)
>
>
>This ensures that errorCheckingFunc gets defer.FAILURE for those deferreds
>that finished up in their errback chain. Adding the lambda _: pass errback
>to each deferred in deferreds after it has been passed to DeferredList
>makes sure the errback chain doesn't later reach its end with an unhandled
>error.
>
>It that the right/best/approved way to handle needing to deal with errors
>in the callback of a DeferredList and not trigger the "Unhandled error in
>Deferred" message?
>

You can do this (if you replace `pass? with `None?, anyway) or you can
pass `consumeErrors=True? to the `DeferredList? initializer which will
make it do something equivalent.

Jean-Paul


From mishok13 at gmail.com  Fri May 23 14:09:27 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Fri, 23 May 2008 21:09:27 +0300
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <192840a00805231109o222e4a82le0ba442c817ef02e@mail.gmail.com>

2008/5/22 cm_gui <cmgui2 at gmail.com>:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Troll harder.

> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From lavrey-2 at mail.ru  Sat May 24 12:01:26 2008
From: lavrey-2 at mail.ru (yura)
Date: Sat, 24 May 2008 09:01:26 -0700 (PDT)
Subject: ero magazines
Message-ID: <36740ee1-be49-4961-bcf9-3eb1ca41e243@c65g2000hsa.googlegroups.com>

http://ero-mag.net


From basti.wiesner at gmx.net  Mon May 26 11:49:01 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 17:49:01 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <g1em6f$916$02$1@news.t-online.com>

[ erik.oosterwaal at gmail.com <erik.oosterwaal at gmail.com> ]

> 1. I love the control I have over my html using inline, template-based
> vbscript. ASP.NET's web forms really sound like a very bad idea, also
> the approach Microsoft takes in trying to make a stateless web-app
> seem like a statefull application is IMHO a burden. I think webapps
> are inherently different than desktop apps, and should be programmed
> as such.
> [...]
> 3. I like the rapid development I can do in a dynamic, loosely typed
> language like vbscript. The performance-bottleneck of a site is mostly
> in the database-access and the http-calls and I think writing all of
> the declarations and types for a strong-typed language is overkill for
> a webapp.
> 
> So that's when I started looking at other dynamic languages for
> webdevelopment. I looked at Ruby on Rails and at the different web-
> frameworks that are available for Python. The biggest problem there
> for me is that the MVC type frameworks that are currently very popular
> are also not what I'm looking for.
> 
> I like having my directory tree conform to the structure of my
> website, so the "Controller" part of the MVC style of development is
> something I wouldn't want. What I -would- like is a separation of code
> and display logic (so being able to include libraries in a page) and
> being able to intermix code directly into the HTML.

Summarising, you are searching for a framework, which allows you to embed
much code in templates, follows the directory structure of a classic
conventional website and has ORM features, but does not resemble desktop
programming or use the MVC pattern.

In this case I feel like have to disappoint you, I don't know any such thing
for python.  You will have to put this together from different components. 

I guess, using a simple WSGI wrapper as Werkzeug or Paste, and combining it
with a powerful ORM like SQLAlchemy and a templating engine, which allows
you to embed full python code in the templates (e.g. Mako), will best suite
your needs, as it gives you the freedom to design the application following
your ideas.  

Modern frameworks like Django or Grok require a somewhat great adaption,
since they strongly restrict the programmer's freedom.  I doubt, that you
would get Django or Grok working like your asp framework.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From mwilson at the-wire.com  Thu May 22 14:46:57 2008
From: mwilson at the-wire.com (Mel)
Date: Thu, 22 May 2008 14:46:57 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
Message-ID: <g14f5u$ioe$1@aioe.org>

Mensanator wrote:

> On May 22, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
>> Dave Parker <davepar... at flamingthunder.com> wrote:
>> > But after getting input from children and teachers, etc, it started
>> > feeling right.
>>
>> > For example, consider the two statements:
>>
>> > x = 8
>> > x = 10
>>
>> > The reaction from most math teachers (and kids) was "one of those is
>> > wrong because x can't equal 2 different things at the same time".
>>
>> This is a common feature in functional languages...
>>
>> Eg
>>
>> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
>> [async-threads:0] [kernel-poll:false]
>>
>> Eshell V5.6.2 ?(abort with ^G)
>> 1> X = 8.
>> 8
>> 2> X = 10.
>> ** exception error: no match of right hand side value 10
>> 3>
>>
>> That error message is the erlang interpreter saying "Hey I know X is
>> 8, and you've said it is 10 - that can't be right", which is pretty
>> much what math teachers say too...
> 
> Are you saying that erlang treats 1> as an assignment, yet
> treats 2> as a comparison?
> 
> That's inconsistent. No wonder nobody uses erlang.

In Prolog terms, they're both unification.  If X has never been defined you
can define it as 8 with no chance of contradicting anything.  Once X is 8,
the proposition "X is 10" is false.

I act as though Erlang thinks the same. My Erlang chops aren't as good as my
Prolog chops were.

        Mel.




From gherron at islandtraining.com  Tue May 27 18:26:04 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 27 May 2008 15:26:04 -0700
Subject: Maximum items in a list?
In-Reply-To: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>
References: <b29792fd-067b-460e-9470-032ea48aa290@u12g2000prd.googlegroups.com>
Message-ID: <483C8A7C.50408@islandtraining.com>

Zerge wrote:
> Hi,
>
> Is there a theoretical limit to the number of items that can be
> appended to a list?
> thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

No, only practical limits of memory, time and such.

Gary Herron



From tdahsu at gmail.com  Fri May 23 10:25:10 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Fri, 23 May 2008 07:25:10 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
	<e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>
	<46a05430-18c9-4383-a22f-2006036842dd@d45g2000hsc.googlegroups.com> 
	<B4WdnSHyV_6c26vVnZ2dnUVZ_gudnZ2d@earthlink.com>
Message-ID: <64923c66-0076-4b7b-af2c-1180fb560b4b@34g2000hsf.googlegroups.com>

On May 23, 12:20?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Thu, 22 May 2008 11:03:48 -0700 (PDT), tda... at gmail.com declaimed the
> following in comp.lang.python:
>
> > Ah, well, I didn't get any other responses, but here's what I've done:
>
> ? ? ? ? Apparently the direct email from my work address did not get through
> (I don't have group posting ability from work).
>
> > loopCount = 0
> > ? ? ? ? ? ? ? ? for l in range(len(self.filesToProcess)):
> > ? ? ? ? ? ? ? ? ? ? threads = []
> > ? ? ? ? ? ? ? ? ? ? try:
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +l])))
>
> ? ? ? ? Python lists index from 0... So this will be 0+0, first entry in the
> file list
>
>
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +2])))
>
> ? ? ? ? This is 0+2, THIRD entry in the file list -- you've just skipped
> over the second entry...
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +3])))
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +4])))
>
> > threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
> > +5])))
>
> ? ? ? ? Very ugly... Also going to fail for other reasons... Consider:
>
> filestoprocess = [ 'file1', 'file2', 'file3' ]
> for jnk in range(len(filestoprocess)): ?#this will loop three times!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #jnk = 0, 1, 2
>
> ? ? ? ? You proceed to create FIVE threads (or try to) when there are only
> THREE files... It will fail as soon as it tries loopCount+3 (fourth
> entry in a three element list)
>
> > ? ? ? ? ? ? ? ? ? ? ? ? msg = "Processing file...\n"
> > ? ? ? ? ? ? ? ? ? ? ? ? for thread in threads:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? wx.CallAfter(self.textctrl03.write(msg),
> > thread.start())
>
> ? ? ? ? Is this running as the main controller of some GUI? if so...
>
> > ? ? ? ? ? ? ? ? ? ? ? ? for thread in threads:
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? thread.join()
>
> ? ? ? ? Your GUI will essentially freeze since it can't process events
> (including screen updates) until the entire function you are in returns
> to the event handler... But .join() blocks until the specified thread
> really finishes...
>
> > ? ? ? ? ? ? ? ? ? ? ? ? loopCount += 5
> > ? ? ? ? ? ? ? ? ? ? except IndexError:
> > ? ? ? ? ? ? ? ? ? ? ? ? pass
>
> ? ? ? ? BAD style -- if you are going to trap an exception, you should do
> something with it... But then, the only reason you would GET this
> exception is because the preceding code is looping too many times
> relative to the number of files...
>
> ? ? ? ? As shown, with three files, you will create the first thread (0) for
> first file, skip the second file creating the second thread (1) for the
> third file, and raise an exception on trying to create the third thread
> (2) when you try to access a fourth file in the list. ?The exception
> will be raised -- SKIPPING over the thread.start() calls, and skipping
> the thread.join() calls. You then ignore the error, and go back to the
> start of the loop where the index is now "1"... AND reset the thread
> list, so threads 0&1 are forgotten, never started, never joined, garbage
> collected...
>
> ? ? ? ? Again, you now create a thread (0) giving it the second file (since
> loopCount was never incremented, and the first thread is using loopCount
> + <loopindex>), create thread (1) giving it the third file, raise the
> exception... repeat
>
>
>
> > It works, and it works well. ?It starts five threads, and processes
> > five files at a time. ?(In the "self.processFiles" I read the whole
> > file into memory using readlines(), which works well.)
>
> ? ? ? ? It only works as long as loopCount+5 is less than the number of
> files in the list... AND at that, it skips one file and double processes
> another...
>
> > Of course, now the wx.CallAfter function doesn't work... I get
> > "TypeError: 'NoneType' object is not callable" for every time it is
> > run...
>
> ? ? ? ? Probably because it wants you to supply it with one or two
> /callable/ functions... but you are actually calling the functions and
> passing it the results of the called functions (and they aren't
> returning anything -- None).
>
> ? ? ? ? Ignoring GUI stuff... here is a simple one-job threadpool algorithm
> -- you have to plug in the file list and the actual processing work. It
> creates n-threads; and those threads pull the work off of a common
> queue; the main program only has to fill the queue with the work to be
> done, and stuff a sentinal value onto the queue when it wants the
> threads to die -- which would be before shutdown of the program (create
> the pool at start-up, leave the threads blocked on the .get() until you
> need one to process...
>
> -=-=-=-=-=-=-=-
> #
> # ? ? ? Example code for a pooled thread file processor
> # ? ? ? NOT EXECUTABLE as is -- there is no code to obtain
> # ? ? ? the list of files to be processed; and the processor
> # ? ? ? just sleeps...
>
> import threading
> import Queue
> import time ? ? ? ? #just for demo sleep
>
> NUMTHREADS = 5
> SENTINAL = object()
>
> workQueue = Queue.Queue()
>
> def fileProc(): ? ? ? ? #function that handles processing of the files
> ? ? while True:
> ? ? ? ? fname = workQueue.get()
> ? ? ? ? if fname is SENTINAL:
> ? ? ? ? ? ? workQueue.put(SENTINAL) ? ?#recycle sentinal for next
> ? ? ? ? ? ? break
> ? ? ? ? print "Processing %s" % fname
> ? ? ? ? time.sleep(3) ? #replace with real file processing
>
> threadList = []
> for ti in range(NUMTHREADS): ? ?#create worker threads
> ? ? t = threading.Thread(target=fileProc)
> ? ? t.start()
> ? ? threadList.append(t)
>
> for fn in listOfFiles: ?#queue up the file names to be worked
> ? ? workQueue.put(fn) ? #need to expand to include how names are
> ? ? ? ? ? ? ? ? ? ? ? ? #obtained
>
> workQueue.put(SENTINAL) #signal that no more files are to be worked
>
> for t in threadList:
> ? ? t.join() ? ? ? ? ? ?#wait for each thread to exit (ensures main
> ? ? ? ? ? ? ? ? ? ? ? ? #doesn't exit before all threads finish
> processing
>
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? ?wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

Thanks for the information!  I can definitely see what you're talking
about, and the Exception is only "pass" right now while I am working
on the code.

However, it does process every file (it doesn't skip the second one),
and I'm guessing that this is because it loops so many times?  I guess
that means I am successful in spite of myself!  ;-)  (This wouldn't be
the first time...  ;-)  )

I REALLY appreciate your insights!!


From myshelter at gmail.com  Sun May  4 05:23:37 2008
From: myshelter at gmail.com (Protected)
Date: Sun, 4 May 2008 02:23:37 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
Message-ID: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>

Hello. I'm a complete newbie trying to learn Python. I decided to try
some Tkinter examples, including the one from the library reference,
but they don't seem to do anything! Shouldn't there be, like, a
dialog?

I'm running Windows XP and using IDLE. You can assume my version of
Python is the latest.


From precisionreplicas at gmail.com  Fri May 30 00:37:54 2008
From: precisionreplicas at gmail.com (Best Replica Watches)
Date: Fri, 30 May 2008 12:37:54 +0800
Subject: TAG Heuer replica watches - Fake Watches
Message-ID: <g1o0b2$avl$1@news.cn99.com>

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From george.sakkis at gmail.com  Mon May 26 18:33:20 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 15:33:20 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c6666386-1416-4a36-b733-d1e7f851789a@34g2000hsh.googlegroups.com> 
	<7ac2b19c-2835-41dc-8099-ed1cec20253b@z72g2000hsb.googlegroups.com> 
	<543b69c4-fad1-421a-a391-cb2822b1ca63@79g2000hsk.googlegroups.com> 
	<6adb8c2e-d0f8-4bba-98cf-d9495baabfea@c58g2000hsc.googlegroups.com>
Message-ID: <d8044516-dc7d-4402-b985-3033fffa4d6c@r66g2000hsg.googlegroups.com>

On May 26, 4:51?pm, notnorweg... at yahoo.se wrote:

> On 26 Maj, 22:16, miller.pau... at gmail.com wrote:
>
> > On May 26, 3:56 pm, notnorweg... at yahoo.se wrote:
>
> > > is the first example here a layer between machine and the second
> > > example?
>
> > My first example was intended to be C, or at least close to it. ?The
> > second example is Python. ?I consider the C snippet to be low-level,
> > while the corresponding Python is high-level. ?There are simply fewer
> > extraneous details for me to worry about at the Python level, and
> > that's why I prefer to work with Python over C when practical.
>
> i know one is C and one i spython, iwas talking more at a conceptual
> level and i know cpython is written in C.
>
> what im asking is can a highlevellanguage be written directly on top
> of the machine or a highlevellanguage is always written on top of a
> lowlevellanguage?

In principle it can be written directly on top of the machine. In
practice it doesn't, for the same reasons we don't build spaceships by
directly gluing molecules together. Civilization as we know it would
be impossible without hierarchical levels of abstraction.

George


From devphyl at gmail.com  Sun May 11 05:17:52 2008
From: devphyl at gmail.com (alefajnie)
Date: Sun, 11 May 2008 02:17:52 -0700 (PDT)
Subject: what does int means for python ?
Message-ID: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com>

#!/usr/bin/env python

arr = [[0 for c in range(0, 10)] for r in range(0, 10)]             #
10x10 array

arr[2,3]                 # throws TypeError: list indices must be
integers
arr[int(2), int(3)]     # also throws TypeError: list indices must be
integers !

-------------------------------------------------
what is wrong in above script ?




From beema.shafreen at gmail.com  Thu May 15 05:02:29 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Thu, 15 May 2008 14:32:29 +0530
Subject: basic comparing files
Message-ID: <aa405c1f0805150202w3f1dc823wf363512f276f7e93@mail.gmail.com>

hi all,

I have a very basic doubt

I am comparing two files A and B
which has three columns a1, b1 of A and a2, b2
say for example if need to compare a1 with a2 and if there are common i have
display a1, b1, b2
or else i have to display a1 , b1 or a1, b2

is the set function going to be the best option or is there any other way



-- 
Beema Shafreen
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From Thomas.Karolski at googlemail.com  Fri May 23 11:42:50 2008
From: Thomas.Karolski at googlemail.com (Thomas Karolski)
Date: Fri, 23 May 2008 17:42:50 +0200
Subject: Decorator metaclass
In-Reply-To: <3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<3372d0a4-84c3-44ae-abf6-f431cb5b1164@8g2000hse.googlegroups.com>
Message-ID: <g16om6$mvb$1@ger.gmane.org>

Thanks for pointing out all those mistakes. I think I'm already starting 
to grasp all of the python magic going on in there.

> Parenthetical: I don't normally recommend this style, since it
> obscures the fact that you're using a custom metaclass to the user.
> That is something the user probably would benefit from knowing, if for
> no other reason than so they can make a mental note about where to
> look first if something goes wrong.  I prefer to make the user use the
> __metaclass__ attribute.

Really just personal preference I think. I'm not really a friend of 
declaring variables if there is a more "intuitive" way.

>> class HBar(Decorator):
>>         def __init__(self, number):
>>                 Decorator.__init__(self)
> 
> Ok, at this point you have to ask yourself what you want to do,
> because the solution you choose will involve trade-offs.

Yes, it was probably a bad example. I decided not to call the Decorator 
's __init__ method in my new version (which I have posted as a reply to 
the reply of Maric Michaud).

> You will note that Decorator does not define __init__.  In fact,
> object.__init__ will be called, which does nothing.  If you think that
> all classes with DecoratorType as their metaclass will be a direct
> subclass of Decorator, you can get away with not calling
> Decorator.__init__ at all.

Now, inside my new version, I have a class which inherits from both 
Decorator and Window, out of which the __init__ for Decorator is not 
called. Does this prove to be a problem?

> Probably the best piece of advice is "Don't try to use Decorator
> pattern".  :)

Well, I decided on the decorator pattern, because I want to be able to 
change the behavior of classes during run-time. I did not really find 
any other pattern which would let me do that.

Regards,
Thomas K.



From ian.g.kelly at gmail.com  Wed May  7 00:04:26 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 6 May 2008 22:04:26 -0600
Subject: Can't drag and drop onto .py in Windows XP?
In-Reply-To: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
References: <Xns9A96CD4AA7441sizernospamcom@216.40.28.87>
Message-ID: <3fc761710805062104k26fbac28kc8df5e3cc39f6dcb@mail.gmail.com>

On Tue, May 6, 2008 at 9:12 PM, Sizer <Sizer at nospam.com> wrote:
> I have several python utils that look at sys.argv to get a list of
>  filenames to process and mangle the files in various ways. If I have a
>  bar.bat file in Windows XP then I can just drag foo.avi onto bar.bat and
>  bar.bat gets called with foo.avi as an argument, everyone's happy. But if I
>  have a bar.py (or .pyw) and try to drag and drop foo.avi to it, I get a big
>  NO cursor and nothing happens.
>
>  Now I can work around this by creating a _bar.bat and having the _bar.bat
>  call bar.pyw with the filenames it was passed (this is obviously
>  ridiculous). Or I can create a shortcut which has the target of
>    c:\python25\pythonw.exe c:\mybar\bar.pyw
>  and that works, but makes telling people how to install my utilities on
>  their computer a pain in the rear. It's just a little weird that I can't
>  just drag and drop file names onto .pyw or .py files. Am I missing
>  something here?

I believe the problem is that Windows doesn't view bar.py as an
executable file, but as a data file with an associated launcher.  It's
not smart enough to figure out that when you try to drop a file onto a
.py file, you want it to run python.exe with both the .py file and the
dropped file as arguments.  I don't think there's any way to change
this behavior, but I could be mistaken.


From alex.m.gusarov at gmail.com  Wed May 28 13:34:53 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 00:34:53 +0700
Subject: Struct usages in Python
In-Reply-To: <1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
Message-ID: <ac6dcb3d0805281034k60d9e6b1qedfcb1ad005a0a28@mail.gmail.com>

>  class Event(object):
>
> Always subclass object, unless you have a very compelling reason not to,
> or you are subclassing something else.
>

I've thought that if I write

class Event:
    pass

, it'll be subclass of object too, I was wrong?

--
Best regards, Alex Gusarov


From sandip.more at gmail.com  Tue May  6 02:00:11 2008
From: sandip.more at gmail.com (sandipm)
Date: Mon, 5 May 2008 23:00:11 -0700 (PDT)
Subject: config files in python
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
	<ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>
Message-ID: <e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>

Thanks for various useful suggestions.
actually right now I am using conf files only in psp handler of
mod_python/apache
but I have other processes which might use same config files.

One way is I can put conf related data directly in database and
database handling module can directly pickup values from db.
but the problem with that approach is that it is difficult in managing
changes from version control system.as I need to explicitly
create DB scripts to put it in version control and other devs require
them run those scripts.

but if I put those conf params in files it would be easy for me to
change params and useful for other developers
to integrate those changes in their dev environments without doing any
explicit ops.

here I would like to have python file which read conf from text file
and load those params in current process space.
so only importing that python file should read up the conf file and
load the current process with configurable parameters.
I thought this would be good way to do it, rather than getting
involved in slightly complicted reload mechanisms of python modules?



Regards,
Sandip



From deets at nospam.web.de  Tue May 20 09:34:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:34:44 +0200
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
Message-ID: <69g2clF31ttuuU2@mid.uni-berlin.de>

Chuckk Hubbard wrote:

> #!/usr/bin/python
> 
> #why doesn't this run both threads simultaneously?
> #Thanks for any help.
> #Chuckk

Because you should call thread.start().


Diez


From mszpadzik at gmail.com  Fri May 30 03:42:33 2008
From: mszpadzik at gmail.com (Mike)
Date: Fri, 30 May 2008 00:42:33 -0700 (PDT)
Subject: Python threads and memory usage
References: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>
	<n8adnVRcIvt7NKLVnZ2dnUVZ_vSdnZ2d@earthlink.com>
Message-ID: <2baa96da-be9b-493f-8d8f-156a4cce763d@z72g2000hsb.googlegroups.com>

On May 30, 9:16?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Thu, 29 May 2008 12:01:30 -0700 (PDT), Mike <mszpad... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > I observed, that every thread reserved some memory, and after exit
> > thread doesn't freed it. When i leaved my server working for 3 days,
> > then it takes 15% of 512MB memory (during that time about 15000
> > threads were created and stopped). When server starts it only takes
> > about 1% of memory.
>
> ? ? ? ? Do you have any outstanding references to the threads? If so, have
> you performed a .join() with the thread? Until you join it, the thread
> state (thread local objects/"variables") are probably being held for
> access from outside the thread.
> --
> ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? wulfr... at bestiaria.com
> ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/

I'm joining threads only during my program exit. I'll try to do what
You suggest.

THX


From ivan.illarionov at gmail.com  Sun May 25 16:55:07 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 20:55:07 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
Message-ID: <g1cjnb$1p57$1@news.mtu.ru>

On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
[...]
> A quick look at the revision log:
> 
> http://byteflow.su/log/
> 
> reveals that the initial commit of 60 or so files has been done on
> 08/14/07
> (10 months ago), a second developer came on board 12/01/07 (seven+
> months ago),
> a third one, on 01/04/08 (six+ months ago), a fourth one, on 01/16/08
> (also
> six+ months ago).  There are at least nine discernible contributors
> overall.
> Say what you will, but it still looks an awful lot like like two man-
> years,
> Django or no Django...

I bet that if they did this with PHP framework they where far from where 
they are now.

I didn't say that it's not possible to write good code in PHP, I said 
that Python and Django encourage cleaner code more than PHP and PHP 
frameworks do. 

IMHO Python language is better designed and this influences everything 
written in it.

Yes, it's possible to write something clean in PHP but it would require a 
lot more work.

Ivan




From larsnostdal at gmail.com  Sat May 10 06:36:38 2008
From: larsnostdal at gmail.com (=?UTF-8?B?TGFycyBSdW5lIE7DuHN0ZGFs?=)
Date: Sat, 10 May 2008 12:36:38 +0200
Subject: implementation for Parsing Expression Grammar?
In-Reply-To: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <48257ab7$0$29576$c83e3ef6@nn1-read.tele2.net>

Hi,
Finite automata works for "nested things".

http://en.wikipedia.org/wiki/Automata_theory

-- 
Lars Rune N?stdal
http://nostdal.org/


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:48:46 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:48:46 -0300
Subject: Weird bug with an integer
References: <5dc598e30805081844n834a776v812be9afd61e496@mail.gmail.com>
	<5dc598e30805081847n5e2ed2a5jeb8e8da6263dd11c@mail.gmail.com>
Message-ID: <op.uavg3kxnx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 22:47:59 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> Ps:
> When I go to shell and type:rowN = int(0)

Why int(0)? Why not just 0???

>> Look this slice of code:
>>
>> rowN = int(0)
>>         for row in rows:
>>             success = self.resultGrid.AppendRows();
>>             colN = int(0)
>>             for col in row:
>>                 self.resultGrid.SetReadOnly(self.resultGrid.GetNumberRows()
>> - 1,colN,isReadOnly = True)
>>                 print rowN
>>                 self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>>
>> I am getting this output:
>> 0
>> 0
>> 0
>> 0
>> 0
>> 0
>> 0
>> (1,)
>> Traceback (most recent call last):
>>      in populateGrid
>>     self.resultGrid.SetCellValue(int(rowN),int(colN),col)
>> TypeError: int() argument must be a string or a number, not 'tuple'

Your piece of code doesn't show when and how rowN is changed, it's set as  
0 at the start. Try to see what happens with rowN elsewhere...

-- 
Gabriel Genellina



From stefan_ml at behnel.de  Thu May 22 04:10:43 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Thu, 22 May 2008 10:10:43 +0200
Subject: Cython code generation for Py3 complete
Message-ID: <48352a83$0$6547$9b4e6d93@newsspool3.arcor-online.net>

Hi,

just a quick announcement that I finished the port of the Cython compiler to
the Py3 target platform. While you cannot currently run Cython itself in Py3,
you can build the generated C sources unchanged under Py2.3 through 3.0a5.

    http://cython.org/

There isn't a release yet (though there will hopefully be one soon), but I
would be happy if interested people could already give it some testing. So if
you have some Pyrex sources lying around and want them to run on Python 3k,
please give it a try and report any problems you find to the Cython mailing list.

You can get the compiler from the public Mercurial repository:

    http://hg.cython.org/cython-devel/

and I have put up a developer snapshot here:

http://codespeak.net/lxml/dev/Cython-0.9.6.14-3k.tar.gz

Hoping for some feedback,

Stefan


From ivoras at __fer.hr__  Fri May  9 09:54:16 2008
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Fri, 09 May 2008 15:54:16 +0200
Subject: How to modify meaning of builtin function "not" to "!"?
In-Reply-To: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <g01l28$k50$1@news1.carnet.hr>

grbgooglefan wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
> 
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
>      return 1
> 
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
> 
> How can I make "not" as "!"?

"not" is a perfectly valid boolean operator in Python and means just
what "!" means in C. The equivalent binary operator is "~", just like in C.

>>> print not True
False
>>> print not 1
False
>>> print not 0
True
>>> print ~1
-2
>>> print ~0
-1


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From unknown_hero007 at hotmail.com  Tue May  6 03:48:00 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 00:48:00 -0700 (PDT)
Subject: Scanning through Windows registry...
Message-ID: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>

Hi everyone!

Well, I have this need for a Python script that will scan through a
selected hive (like HKEY_LOCAL_MACHINE) and replace all strings that
contain word xxx (IE. foo) with yyy (IE. moo). I do not want partial
results, but rather complete strings (no foome or the like, just foo).


I have a basic understanding of Python, but this is beyond my skills.

I was looking for something like this:

open key (HKEY_LOCAL_MACHINE)
while (not end of list)
  open next subkey
  search subkey for value (old)
  SetValue(key, subkey, REG_SZ, new)
  close subkey
end while
close key


From me at jonbowlas.com  Mon May 19 07:27:23 2008
From: me at jonbowlas.com (Jon Bowlas)
Date: Mon, 19 May 2008 12:27:23 +0100
Subject: ftplib returns EOFError
Message-ID: <002c01c8b9a3$4fb74dc0$020ba8c0@bowlas>

Hi All,

I've written a little method to connect to an ftpserver which works well,
however when I send a file using this ftp connection oddly I _sometimes_ get
returned an EOFError from ftplib.getline even though my file is actually
transferred. 

Here's my script:

    def uploadViaFtp(self, file, filename):
        '''A method to upload a file via ftp'''
        ftpserverloc = self.getItunesUftpServer()
        ftpserverusername = self.getItunesUftpUser()
        ftpserverpassword = self.getItunesUftpPsswd()
        ftp = ftplib.FTP(ftpserverloc)
        ftp.login(ftpserverusername, ftpserverpassword)
        try:
            ftp.storbinary("STOR " + filename, file, 1024)
        finally:
            file.close()
        ftp.quit()


And here's the traceback:
Traceback (innermost last):
  Module ZPublisher.Publish, line 114, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 40, in call_object
  Module Products.FileSystemSite.FSPythonScript, line 108, in __call__
  Module Shared.DC.Scripts.Bindings, line 311, in __call__
  Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
  Module Products.FileSystemSite.FSPythonScript, line 164, in _exec
  Module None, line 28, in upload_submit
   - <FSPythonScript at
/silva/service_views/UCLItunesUPodcast/edit/Asset/UCLItunesUTrack/upload_sub
mit>
   - Line 28
  Module Products.UCLItunesUPodcast.UCLItunesUService, line 138, in
uploadViaFtp
  Module ftplib, line 523, in quit
  Module ftplib, line 246, in voidcmd
  Module ftplib, line 221, in voidresp
  Module ftplib, line 207, in getresp
  Module ftplib, line 193, in getmultiline
  Module ftplib, line 183, in getline
EOFError


Any help in catching and ignoring this error would be greatly appreciated.

Regards

Jon



From dwblas at gmail.com  Sat May  3 13:55:59 2008
From: dwblas at gmail.com (dwblas at gmail.com)
Date: Sat, 3 May 2008 10:55:59 -0700 (PDT)
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
	<mailman.418.1209661511.12834.python-list@python.org>
Message-ID: <fa1d76a8-1144-48e6-bdf6-62e7cd1ea79b@b9g2000prh.googlegroups.com>

On May 1, 10:04 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "jmDesktop" <needin4mat... at gmail.com> wrote in message
> |
> | s = 'abcde'
> | i = -1
> | for i in range (-1, -len(s), -1):
> |    print s[:i], i
> | Why doesn't the first one have the e if -1 is the end of the list?

That should be obvious.  'print s[-1]' will yield the "e", but your
code is using slicing, s[:i], not printing elements from a list.  Your
code starts with the value s[:-1], which is exactly the same as
s[0:-1], so you print the string from 0 to -1 which omits the last
letter.  The next time it omits the last 2 letters s[:-2].  As already
stated, that should be very obvious.  Also, if you want a response in
the future, make your code readable.  That means not using, "i", "l",
or "o" as variable names.  They look too much like numbers and some
people won't waste their time trying to distinguish between them.
There are 23 other letters that work just a well.


From sven.siegmund at gmail.com  Mon May 12 14:05:32 2008
From: sven.siegmund at gmail.com (Sven Siegmund)
Date: Mon, 12 May 2008 11:05:32 -0700 (PDT)
Subject: Cannot run Python 3.0a5 )-:
References: <ed51fd8c-8e04-4ecb-a745-4fa2e2286ce7@a1g2000hsb.googlegroups.com>
Message-ID: <aae04ea3-cea0-45ee-87ad-f74e7c0e0808@34g2000hsh.googlegroups.com>

Ah, I solved it. I was wrong. I did not do the same as yesterday.
Yesterday I downloaded Python 3.0a5 from http://www.python.org/ftp/python/3.0/python-3.0a5.msi
and not the daily build.

I can python again now (-:

S.


From jgodoy at gmail.com  Mon May 19 07:14:16 2008
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 19 May 2008 08:14:16 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<slrng32e0q.egt.hat@se-162.se.wtb.tue.nl>
Message-ID: <r848g5-o82.ln1@strongwill.g2ctech>

A.T.Hofkamp wrote:

> Also, why do you make a distinction between shared and non-shared code?
> You could simply eliminate 'shared' directory, and put its contents
> directly under myproject.

I would go further and make them individual projects, with their own version
control, code repository and then install them as eggs using setuptools.

This has been working fine for me in some projects and has the advantage of
being reusable in different big projects.

Also, using setuptools on each big project I don't have to worry with
dependencies because it downloads and installs everything to me when I
install the main project.

>> Is there a way to set this up that is a bit more self contained? For
>> example, at first I was somewhat hopeful that Python could ascend
>> parent directories until it reached a directory that did not include
>> an __init__.py file, and it could use this as a root for referring to
>> packages and modules from any file contained within. (e.g. in the
>> example project above, any file could refer to myproject.shared.mylib1
>> so long as 'myproject' and all subdirectories contained an
>> __init__.py, and the parent of 'myproject' didn't contain such a
>> file). Evidently this is not the case, but it seems like it could be a
>> useful feature in these situations.

Eggs would solve that as well.  They would behave like any other
installed "library" on your system.

-- 
Jorge Godoy      <jgodoy at gmail.com>



From castironpi at gmail.com  Mon May 12 01:27:40 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 22:27:40 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
	<97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>
	<68h7p7F2su97jU3@mid.uni-berlin.de> <8763tofpiv.fsf@mulj.homelinux.net>
	<875ee438-b682-489e-b284-b22620384a75@m44g2000hsc.googlegroups.com> 
	<e1ba669d-f62d-42fb-811c-227351d030de@26g2000hsk.googlegroups.com>
Message-ID: <6635579f-d89e-4b93-9a6a-96935842013e@56g2000hsm.googlegroups.com>

On May 11, 6:21?pm, krustymon... at gmail.com wrote:
> On May 8, 7:29 pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 8, 4:35 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>
> > > Marc 'BlackJack' Rintsch <bj_... at gmx.net> writes:
>
> > > > On Thu, 08 May 2008 08:55:35 -0700, krustymonkey wrote:
>
> > > >> The thing is, I'm not using slots by choice. ?I'm using the standard
> > > >> lib "socket" class, which apparently uses slots.
>
> > > > `socket` objects can't be pickled. ?Not just because of the
> > > > `__slot__`\s but because a substantial part of their state lives in
> > > > the operating system's space.
>
> > > Of course, if it makes sense to pickle sockets in the application, one
> > > is can do so by defining __getstate__ and __setstate__:
>
> > > class Connection(object):
> > > ? ? def __init__(self, host, port):
> > > ? ? ? ? self.host = host
> > > ? ? ? ? self.port = port
> > > ? ? ? ? self.init_sock()
>
> > > ? ? def init_sock(self):
> > > ? ? ? ? self.sock = socket.socket()
> > > ? ? ? ? self.sock.connect((host, port))
> > > ? ? ? ? ... init communication ...
>
> > > ? ? def __getstate__(self):
> > > ? ? ? ? # pickle self as a (host, port) pair
> > > ? ? ? ? return self.host, self.port
>
> > > ? ? def __setstate__(self, state):
> > > ? ? ? ? # reinstate self by setting host and port and
> > > ? ? ? ? # recreating the socket
> > > ? ? ? ? self.host, self.port = state
> > > ? ? ? ? self.init_sock()
>
> > I, local, am mystified that you'd want to pickle a socket. ?It's a
> > live connection, which flies on a pocket dollar. ?You don't want it on
> > disk, do you?
>
> > If you're running a net buoy through a cluster somewhere, do you want
> > to drop a server and reconnect? ?Is Amazon's EC2 up and running?
>
> > Certainly no one was talking on the internet. ?Were you?
>
> > I don't think you hit anything but banks surfing the web, and the
> > American dollar is notoriously stuffy. ?Pump a wi-fi to a diner,
> > though, and you're just talking more. ?Where's Usenet?
>
> The idea is a pre-fork socket server. ?What I want to do is fork off
> some child processes from the parent and use IPC to send the
> connection object (via socket.accept()) over a pipe to one of the
> preexisting child processes and have said child handle the
> transaction. ?Think Apache, if you want an example of what I'm trying
> to do here. ?This alleviates the process startup cost that occurs when
> you fork. ?If the socket object can't be serialized, is there another
> way to go about handling this in python?- Hide quoted text -
>
> - Show quoted text -

That's out of my expertise.  You would have to either hack it on a
router you are running (masquerade), or choose a different family of
sockets.  For HTTP, you could issue a 'reroute' return.  Just multi-
thread your server process.


From bignose+hates-spam at benfinney.id.au  Mon May 19 21:21:00 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 May 2008 11:21:00 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <87y765hitf.fsf@benfinney.id.au>

James A. Donald <jamesd at echeque.com> writes:

> I am just getting into python, and know little about it

Welcome to Python, and this forum.

> and am posting to ask on what beaches the salt water crocodiles hang
> out.

Heh. You want to avoid them, or hang out with them? :-)

> 1.  Looks to me that python will not scale to very large programs,
> partly because of the lack of static typing, but mostly because there
> is no distinction between creating a new variable and utilizing an
> existing variable,

This seems quite a non sequitur. How do you see a connection between
these properties and "will not scale to large programs"?

> so the interpreter fails to catch typos and name collisions.

These errors are a small subset of possible errors. If writing a large
program, an automated testing suite is essential, and can catch far
more errors than the compiler can hope to catch. If you run a static
code analyser, you'll be notified of unused names and other simple
errors that are often caught by static-declaration compilers.

> I am inclined to suspect that when a successful small python program
> turns into a large python program, it rapidly reaches ninety percent
> complete, and remains ninety percent complete forever.

You may want to look at the Python success stories before suspecting
that, <URL:http://www.python.org/about/success/>.

> 2.  It is not clear to me how a python web application scales.

I'll leave this one for others to speak to; I don't have experience
with large web applications.

-- 
 \         "I was gratified to be able to answer promptly and I did. I |
  `\    said I didn't know."  -- Mark Twain, _Life on the Mississippi_ |
_o__)                                                                  |
Ben Finney


From fc14301589 at icqmail.com  Sat May 31 07:23:41 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Sat, 31 May 2008 19:23:41 +0800
Subject: File browser in python gui
Message-ID: <4841353e_1@news.tm.net.my>

hi there,

I've started to build a GUI for my Mailsweeper by the help of QT4 Designer.
I came across the problem that there isn't any prebuild file browser like
Kdialog.
I know some other sample, but PyGTK builded. I'm not happy to use a different
widget set or to have to design my own file browser with QT4 widgets. 
It's almost thousand times people need to use such browser, I wonder why I
couldn't find one on the entire day searching on web site.
A QT XML file (.ui extension) should do fine, if someone would help :)

-- 
Mailsweeper Home : http://it.geocities.com/call_me_not_now/index.html


From monica.leko at gmail.com  Sun May 18 09:36:28 2008
From: monica.leko at gmail.com (Monica Leko)
Date: Sun, 18 May 2008 06:36:28 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
Message-ID: <c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>

On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> You want your file considered as a sequence of bits rather
> than a sequence of 8-bit bytes, do you?

Yes.

> is the 10-bit
> bit-pattern to be stored at an arbitrary bit-position in
> the file

Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
sequence of bytes, than 10 bits again, etc.




From greg at cosc.canterbury.ac.nz  Tue May 13 03:48:10 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 13 May 2008 19:48:10 +1200
Subject: ANN: Pyrex 0.9.7.1
Message-ID: <mailman.1033.1210668518.12834.python-announce-list@python.org>

Pyrex 0.9.7.1 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

This version fixes a bug in the new integer indexing
optimisation which causes indexing of a non-sequence type
with a C int to fail with a TypeError.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From hniksic at xemacs.org  Wed May 28 03:30:27 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 28 May 2008 09:30:27 +0200
Subject: multi dimensional dictionary
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
Message-ID: <87od6qrilo.fsf@mulj.homelinux.net>

Gary Herron <gherron at islandtraining.com> writes:

> mydict[(0,"person","setTime")] = "12:09:30"
> mydict[(0,"person","clrTime")] = "22:09:30"

Note that this is more succinctly written as:

    mydict[0, "person", "setTime"] = "12:09:30"

with the added advantage that it looks like a multi-dimensional array.
:-)

The only problem with this approach is that when you want to iterate
over, say, mydict[0], or mydict[0]["person"], it's not possible
without traversing the entire dict.


From roy at panix.com  Sun May 25 10:13:18 2008
From: roy at panix.com (Roy Smith)
Date: Sun, 25 May 2008 10:13:18 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>
Message-ID: <roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>

In article 
<f838bc64-a4ef-4770-b139-01284e0f846c at t54g2000hsg.googlegroups.com>,
 John Roth <johnroth1 at gmail.com> wrote:

> I really don't care what the OP does in his own projects. My objection
> is that, if it goes into the standard library, is that it passes a
> signal that it's good practice to allow dependencies between tests. It
> most definitely is _not_ good practice.

The OP stated that he wants the tests run in a given order.  People are 
assuming that's because he has dependencies between his tests.  Maybe he 
just wants them run in order because it's easier to understand the output 
in a certain order.

For example, I'm currently working on some low-level data marshalling code 
(in another language).  This is the sort of stuff which the Python struct 
module handles -- converting between internal form and network 
representation.  

There is a logical hierarchy of complexity.  Handling characters is easier 
than handling ints, which is easier than floats, which is easier than 
doubles, and so on (arrays, sets and other composite types).  If I was 
porting this to a new platform, I would want the unit tests to run in a 
logical order of simple to complex.  If some assortment of tests failed, 
you want to start debugging the problem on the least complex data types.  
If the tests run in a specific order, it's easier to see where to start.

It's not that any test depends on any other test to run, in the sense that 
there's some shared state between them.  It's just that from a human 
factors point of view, there's a logical order to run them in.

In fact, from a protocol point of view, some of the types really do depend 
on each other.  We send counted strings, for example, so we can't send a 
string until we know how to send an int (for the string length).  If the 
first test that fails is the string test, I know right off that the problem 
is not in how we send ints, because that test ran already and it passed.

Earlier, I gave another example of wanting tests to be run in the same 
order as some externally controlled set of functional requirements.  Again, 
not because the tests have inter-dependencies, but because it just makes it 
easier to interpret the results.

Don't assume inter-test dependencies (which I agree are a Bad Thing) is the 
only reason you want to run tests in a specific order.


From gagsl-py2 at yahoo.com.ar  Sun May  4 01:21:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 02:21:59 -0300
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
Message-ID: <op.ual6ixxxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> escribi?:

> On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
>> I'm actually curious if there's a way to write a generator function
>> (not a generator expression) in C, or what the simplest way to do it
>> is... besides link the Python run-time.
>
> The reference implementation of Python is written in C, so obviously there
> must be a way to write something like generators in C.

Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
See this thread http://groups.google.com/group/comp.lang.python/browse_thread/thread/5f42f72f2d0e88fc/

-- 
Gabriel Genellina



From cjw at ncf.ca  Thu May  8 09:39:04 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Thu, 08 May 2008 09:39:04 -0400
Subject: PCBuild.sin - Attempt to compile Python using Visual Studio 2008
In-Reply-To: <fvut8a$b67$1@theodyn.ncf.ca>
References: <fvut8a$b67$1@theodyn.ncf.ca>
Message-ID: <fvuvpq$cc2$1@theodyn.ncf.ca>

Colin J. Williams wrote:
> 
> The readme.txt has:
> 
> All you need to do is open the workspace "pcbuild.sln" in Visual Studio,
> select the desired combination of configuration and platform and eventually
> build the solution. Unless you are going to debug a problem in the core or
> you are going to create an optimized build you want to select "Release" as
> configuration.
> 
> Unfortunately, the Express Edition (Free) doesn't handle "solution" files.
> 
> Installed Edition: VC Express
> 
> Microsoft Visual C++ 2008 91909-152-0000052-60812
> Microsoft Visual C++ 2008
> 
> 
> Does anyone have any advice for a person who has limited C++ experience 
> and none with the Visual C++ please?
> 
> Colin W.

Please ignore the request above.

In spite of the above message the 
program appears to build and execute OK 
for 2.6a2
Now I have to find where the executable 
has been placed.

Colin W.


From gherron at islandtraining.com  Tue May 13 11:35:10 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 08:35:10 -0700
Subject: looking for a pdf module
In-Reply-To: <4829C0B8.9090605@admailinc.com>
References: <4829C0B8.9090605@admailinc.com>
Message-ID: <4829B52E.6060903@islandtraining.com>

Ethan Furman wrote:
> Greetings!
>
> I'm hoping to be able to generate pdf files on the fly -- are there 
> any python modules out there to do that?
>
> All help appreciated!
> --
> Ethan
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
ReportLabs is a quite extensive open-source project for generating PDF 
files.

    http://www.reportlab.org/

Enjoy,

Gary Herron


From jcd at sdf.lonestar.org  Fri May 30 12:01:55 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 30 May 2008 12:01:55 -0400
Subject: help
In-Reply-To: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>
References: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>
Message-ID: <1212163315.3310.15.camel@aalcdl07.lib.unc.edu>

Take a look at django's built in pagination features:

http://www.djangoproject.com/documentation/generic_views/

http://www.djangoproject.com/documentation/pagination/

Also, take a look at the django specific mailing list.
django-users at googlegroups.com

Cheers,
Cliff

On Fri, 2008-05-30 at 12:59 +0000, ha bo wrote:
> hi 
> i wanna paginate my table (x lines per pages),the size of my table is
> changing according to the user.
> i wanna know if paginator.py can help me ,if yes how?
> some one can help me 
> ps:i use django
> thank you 
> 
> 
> 
> ______________________________________________________________________
> Tous vos amis discutent sur Messenger, et vous ? T?l?chargez
> Messenger, c'est gratuit !
> --
> http://mail.python.org/mailman/listinfo/python-list



From steve at holdenweb.com  Thu May  1 15:41:45 2008
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 01 May 2008 15:41:45 -0400
Subject: Python Wins "Favorite Scripting Language" Award
Message-ID: <mailman.466.1209746882.12834.python-announce-list@python.org>

The Linux Journal readers apparently suffer the same ambiguity as the 
rest of us when it comes to defining what the difference between a 
scripting language and a programming language.

They do, however, clearly like Python, which they voted their scripting 
language of 2008. PHP, Bash and Perl came in reasonably close on 
Python's heels, but 28.9% of those voting voted for Python.

See all the awards at

   http://www.linuxjournal.com/article/10065

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/



From aisaac at american.edu  Thu May  8 17:57:10 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 21:57:10 GMT
Subject: observer pattern question #1 (reference to subject)
In-Reply-To: <k5i4cyb3.fsf@gmail.com>
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
	<JGIUj.52528$Bb3.41853@trnddc01> <k5i4cyb3.fsf@gmail.com>
Message-ID: <WGKUj.8780$0L.8138@trnddc07>

Ville M. Vainio wrote:

> in case of stocks, you are probably monitoring several 

> stock objects, so the stock should probably pass itself to 

> the observer



OK.  This is related to my question #2 (in a separate 

thread), where I'd also appreciate your comments.





> analogous to a typical UI scenario where you have several 

> widgets forwarding events to one big observer - and they 

> *do* provide the event source and event type. 



That is a helpful comparison.





> All in all, though, the right solution should be obvious 

> from the problem at hand. 



For CS types, maybe.  The rest of us are just trying to get 

things done without as much background and context.



Thanks,

Alan




From cokofreedom at gmail.com  Fri May  9 03:45:43 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Fri, 9 May 2008 00:45:43 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
Message-ID: <0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>

>>> key = ''.join(sorted(word))

I tend to strip and lower the word as well, otherwise "Hello" and
"hello" do not compare...depends on what you want though!
Plus you might get a lot of "word\n" as keys...

My technique is the this way

def anagram_finder(words):
    anagrams = {}
    for word in words:
        word = word.strip()
        key = ''.join(sorted(word.lower()))
        anagrams.setdefault(key, []).append(word)
    return anagrams


From zephyrfalcon!NO_SPAM! at gmail.com  Thu May 22 15:44:50 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Thu, 22 May 2008 15:44:50 -0400
Subject: 2 different versions of python compiling files.
In-Reply-To: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
Message-ID: <l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>

TkNeo wrote:
> I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> be upgraded. Can you guys tell me if this scenario is possible.
> 
> 1. Any machine that uses .py files that use libraries that require 2.4
> will have 2.4 on it.
> 2. rest of the machines will have 2.3
> 
> now there is a shared drive. lets say i write a new library called
> testlib.py and put it on the shared drive .. when a script uses it
> from a 2.4 based machine, it will generate a testlib.pyc and leave it
> on the shared drive. going forward that .pyc is used until the
> original lib is changed. now lets say a 2.3 based machine is trying to
> use that lib. it will try to use that pyc file which was compiled by
> py2.4. will it work or crash ?

It should work, as long as the original .py file is still there.  Each Python 
version will check for a .pyc file *corresponding to that version* (e.g. Python 
2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't 
exist, overwriting any existing .pyc file in the process.

If the original .py file is *not* there, it will most likely not work.  If you 
try to import a .pyc file with the wrong version number, you get something like 
this:

 >>> import foo
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ImportError: Bad magic number in foo.pyc

I'm not sure what would happen if multiple Pythons try to write a .pyc file at 
the same time, though...

-- 
Hans Nowak (zephyrfalcon at gmail dot org)
http://4.flowsnake.org/


From akeppke at web.de  Wed May 21 06:24:31 2008
From: akeppke at web.de (akeppke at web.de)
Date: Wed, 21 May 2008 03:24:31 -0700 (PDT)
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
Message-ID: <fc101c41-18c8-45ac-bf8c-a5f368a90d1b@d1g2000hsg.googlegroups.com>

Use

    for i in dir(x):
        print i                # name of member as string
        print getattr(x, i)    # member

regards

    Arno


On 21 Mai, 09:54, m... at pixar.com wrote:
> I want to iterate over members of a module, something like:
>
>     for i in dir(x):
>         if type(i) == types.FunctionType: ...
>
> but of course dir() returns a list of strings.  If x is a module,
> how can I get the list of its members as their actual types?
>
> Many TIA!
> Mark


From mishok13 at gmail.com  Tue May 13 12:57:10 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 13 May 2008 19:57:10 +0300
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>

You sound like a commercial. Is this your way of attracting costumers of FT?

2008/5/13 Dave Parker <daveparker at flamingthunder.com>:
> > 5-10 times faster for what kind of code?
>
>  Mostly numerical analysis and CGI scripting.  All of Flaming Thunder's
>  library code is in assembly language, and Flaming Thunder creates
>  statically-linked pure syscall CGI scripts.
>
>  > I don't see anything that resembles OO features of python, ...
>
>  True.  But in Python, you don't see statically-linked pure-syscall CGI
>  scripts being cross-compiled under Windows for ftp'ing up to a Linux
>  server.  And you don't see the speed of pure assembly language
>  libraries.

I see your assembly language libraries and raise you C language libraries. :)
Python libraries have the speed of pure C language libraries. And
while programs and libraries written in assembly may be twice as fast
as programs and libraries written in C, they're real hell to maintain.
But that doesn't stop you from telling us, that:

>  And I'll be willing to bet that Flaming Thunder will have
>  OO features similar to Python before Python has the features that
>  Flaming Thunder already does.
>

Well, we'll see. But, IMHO, this is highly unlikely.


>  For many people, being 5 to 10 times faster at numerical analysis and
>  CGI scripting is reason enough to pay $19 per year.  But maybe for
>  other people, having slow, inefficient programs and websites is
>  acceptable.

Yeah, right, Python is sooooo slow. :) Show us some sites and programs
that were written in FT.

>
>
>  > And what is really expensive is brain-cycles, not cpu-cycles.
>
>  Depends on whether you're the programmer, or the customer.  I've found
>  that customers prefer products that are 5 to 10 times faster, instead
>  of products that were easy for the developer.

If I'm customer, than why should I care about FT?
If I'm a programmer, I'd better care about brain-cycles.

>
>  And I disagree that Flaming Thunder requires more brain-cycles.
>  Because it's based on leveraging existing English and math fluency
>  (which was one of the original goals of Python, was it not?), I think
>  that Flaming Thunder requires fewer brain-cycles because fewer brains
>  cells have to be devoted to memorizing language peculiarities.

Not everybody has grown in English-speaking community, you know. And
knowing math quite good, I prefer writing "x = y" instead of "Set x to
y".

>
>
>  > Let alone it is
>  > very much a question of view-point if two different looping constructs or
>  > keywords are more awkward than one general looping-concept with only one
>  > keyword. It's a matter of taste.
>
>  Perhaps.  But if elementary school students can easily understand why
>  one programming language gives the answer 100 (Flaming Thunder):
>
>   Write 10^2.
>
>  but can't understand why another programming language gives the answer
>  8 (Python):
>
>   Print 10^2
>
>  then I think the comparison moves beyond a matter of taste into the
>  realm of measurable ease-of-use.

'^' is a bitwise XOR. Python uses "x**y" for raising x to power of y.
What's your point here?

>
>
>
>  On May 13, 9:50 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>  > > Also, several users have rewritten their Python programs in Flaming
>  > > Thunder, and found that Flaming Thunder was 5 to 10 times faster
>  > > (Flaming Thunder compiles to native executables).  So again, since
>  > > many people value their time at more than $0, I think that many people
>  > > will find that Flaming Thunder is worth $19.95 per year.
>  >
>  > 5-10 times faster for what kind of code? I don't see anything that resembles
>  > OO features of python, let alone more advanced concepts like
>  > meta-programming, higher-order functions and such. Which save tremendous
>  > amounts of time coding. If FT grows these and *still* is 5-10 times faster,
>  > I'll salut you.
>  >
>  > And what is really expensive is brain-cycles, not cpu-cycles. Which above
>  > described features save.
>  >
>  > > Plus, me getting paid to work on Flaming Thunder is far more
>  > > motivating than me not getting paid to work on Python.  This weekend,
>  > > Python users will still be debating how to fix awkwardnesses in the
>  > > languages (such as FOR loops where you're just counting the loops and
>  > > not referencing the loop variable) -- but Flaming Thunder users will
>  > > be getting work done using the REPEAT n TIMES constructs that I'll be
>  > > implementing.
>  >
>  > > Python has been around about 15 years, yet still has those
>  > > awkwardnesses.  Flaming Thunder has been out less than 6 months and
>  > > those awkwardnesses are already getting fixed.  The difference: I
>  > > can't afford to ignore users.
>  >
>  > Oh *please*! Try getting nearly as feature & library complete as python is
>  > today - and *then* I'll point to all the akwardness of FT. Let alone it is
>  > very much a question of view-point if two different looping constructs or
>  > keywords are more awkward than one general looping-concept with only one
>  > keyword. It's a matter of taste.
>  >
>  > Diez
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From vivainio at gmail.com  Thu May  8 16:53:37 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Thu, 08 May 2008 20:53:37 GMT
Subject: observer pattern question #1 (reference to subject)
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
	<JGIUj.52528$Bb3.41853@trnddc01>
Message-ID: <k5i4cyb3.fsf@gmail.com>

Alan Isaac <aisaac at american.edu> writes:

> the following: "OK, here's the pattern, now your listener
> wants to know the event source, do not ask something new the
> subject to respond to that need.  That is unnecessary
> coupling.  Instead, just rewrite your listener to maintain
> a reference to the subject."
>
> Do I have that right?

Not really. It has to be determined case-by-case. Note that I'm not
arguing *for* not passing "subject" on notification, just trying to
elaborate on situations that might want to choose that route.

> It seems to me that this response begs the question.
> That is, an appropriate reply seems to be: here is a related
> pattern, call it observer2.  In the observer2 pattern, the
> subject has a getState method and always passes itself when
> it notifies the observer. Now: in what sense does this
> require closer coupling?

It creates stronger connection between the subject and observer,
thereby reducing the amount different of places that can call the
observer (I don't mean different stock, but altogether different
places - say, a central stock controller that can broadcast the change
in several stocks at the time by stock id, once per second).

This is not really a feature of the observer pattern, both approaches
are somewhat valid observer patterns, depending on problem domain. If
you think it makes sense in the first place to have ONE reference to
the subject in observer, it's probably a workable approach - but in
case of stocks, you are probably monitoring several stock objects, so
the stock should probably pass itself to the observer (so that you
don't need to check all stocks every time something changes!).

Of course this stock thing is a bad example for this case, because you
have several stocks per investor. It's analogous to a typical UI
scenario where you have several widgets forwarding events to one big 
observer - and they *do* provide the event source and event type.

> Or to put it a different way, your suggestion that the
> investors should have to *pull* this information from the
> stocks seems out of step with the observer pattern, where
> the stocks should be pushing this information to the
> investor.

It's not necessarily the observer that has the interesting
information. It's quite typical to have general "catch-all"
notifications than report observers that "something has
chanced somewhere, so you should refresh your data". 

All in all, though, the right solution should be obvious from the
problem at hand.


From bellman at lysator.liu.se  Sat May 10 05:45:42 2008
From: bellman at lysator.liu.se (Thomas Bellman)
Date: Sat, 10 May 2008 09:45:42 +0000 (UTC)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org>
Message-ID: <g03qs6$rbg$1@news.lysator.liu.se>

Jean-Paul Calderone <exarkun at divmod.com> wrote:

>                    (Ctrl+Z which sends SIGSTOP and _cannot_ be masked
> or otherwise ignored)

Bzzt!  Ctrl-Z causes a SIGTSTP to be sent, not SIGSTOP, and
SIGTSTP can be both caught, ignored and masked.


-- 
Thomas Bellman,   Lysator Computer Club,   Link??ping University,  Sweden
"You cannot achieve the impossible without   !  bellman @ lysator.liu.se
 attempting the absurd."                     !  Make Love -- Nicht Wahr!


From bronger at physik.rwth-aachen.de  Thu May  1 13:45:35 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 19:45:35 +0200
Subject: Problems with Cheese Shop
Message-ID: <87zlr9vry8.fsf@physik.rwth-aachen.de>

Hall?chen!

How can I authorise to the Python Cheese Shop in order to use
setup.py upload?  Currently, I get

Upload failed (401): You must be identified to edit package information

Thanks!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From efurman at admailinc.com  Thu May 15 13:40:21 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 15 May 2008 09:40:21 -0800
Subject: cgitb performance issue
In-Reply-To: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>
References: <op.ua6r7zcbx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <482C7585.4090109@admailinc.com>


Gabriel Genellina wrote:

> En Wed, 14 May 2008 13:51:40 -0300, Ethan Furman 
> <efurman at admailinc.com>  escribi?:
>
>> Gabriel Genellina wrote:
>>
>>> En Mon, 05 May 2008 15:56:26 -0300, Ethan Furman  
>>> <efurman at admailinc.com> escribi?:
>>>
>>>> I tried adding a form to our website for uploading large files.
>>>> Personally, I dislike the forms that tell you you did something wrong
>>>> and make you re-enter *all* your data again, so this one cycles and
>>>> remembers your answers, and only prompts for the file once the rest of
>>>> the entered data is good.  However, the first time the form loads 
>>>> it  can
>>>> take up to 30 seconds... any ideas why?
>>>
>>>
>>> Hard to tell without looking at the code... And what has cgitb to 
>>> do  with this?
>>>
>> Hmmmm... excellent question, and the answer is -- Nothing.  My
>> apologies.  I'm importing cgi (cgitb was while I was debugging it), as
>> well as a bunch of others.
>>
>> Here's the source, with a bunch of the actual html stripped out.  The -u
>> as well as the last two lines were an attempt to eliminate the 30-second
>> pause while it loads, as it seems to get all data transferred, then just
>> waits for a while.  Any ideas appreciated.  My apologies for the 
>> ugly  code.
>
>
> *When* do you see the 30-secs delay? After uploading the files? I see  
> they're transferred using SMTP, but I think you're not talking about 
> the  time it takes to send the mail.
> I'd use the old-fashioned "print" statement to see *what* gets 
> executed  and how long it takes each step.

The initial load of the page in question is a static html page (done as 
a crutch so there's *something* on screen while the rest of the thing 
loads).  After five seconds the static html page redirects to the python 
cgi script -- and that's where the delay occurs.  I just double checked, 
and it also occurs everytime it has to reload the script.  I'll try the 
print statements and see if I can narrow down where the bottleneck is 
located.  The sending of the file via smtp happens on our server after 
the file has been uploaded, the delays are happening long before that.  
Thanks for your help!
--
Ethan



From danb_83 at yahoo.com  Thu May  8 23:54:59 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 20:54:59 -0700 (PDT)
Subject: range with variable leading zeros
References: <52c13461-f1e6-45f7-9131-8b311bb59ecc@i76g2000hsf.googlegroups.com>
Message-ID: <c45e0065-0ceb-4f72-b267-c63fb128962d@p25g2000pri.googlegroups.com>

On May 8, 10:42?pm, yhvh <yhvh2... at googlemail.com> wrote:
> I want to generate a range with variable leading zeros
>
> x = [0010, 0210]

You do realize that this is octal, right?

> padding = len(x[1])

len is undefined for integers.  Perhaps you meant "len(str(x[1]))".

> for j in range(x[0], x[1]):
> ? ? print (url).join('%0(pad)d(jj)'+'.jpg') %{'pad':padding, 'jj':j}
>
> This is syntactically incorrect, you can't insert a variable into the
> string format options. Any ideas?

You can, however, do this:

>>> '%0*d' % (5, 123)
'00123'


From arnodel at googlemail.com  Wed May 28 13:53:41 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 18:53:41 +0100
Subject: Struct usages in Python
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com>
Message-ID: <m2bq2q48nu.fsf@googlemail.com>

Arnaud Delobelle <arnodel at googlemail.com> writes:

> "Alex Gusarov" <alex.m.gusarov at gmail.com> writes:
>
>>>  class Event(object):
>>>
>>> Always subclass object, unless you have a very compelling reason not to,
>>> or you are subclassing something else.
>>>
>>
>> I've thought that if I write
>>
>> class Event:
>>     pass
>>
>> , it'll be subclass of object too, I was wrong?
>
> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>
> What you define with the statement
>
>     class Event: pass
>
> is an 'old-style' class.  Witness:
>
>     >>> class Event: pass
>     ... 
>     >>> class NewEvent(object): pass
>     ... 
>     >>> type(Event)
>     <type 'classobj'>
>     >>> type(NewEvent)
>     <type 'type'>
>     >>> type(Event())
>     <type 'instance'>
>     del>>> type(NewEvent())
>     <class '__main__.NewEvent'>
>
> All old-style classes are actually objects of type 'classobj' (they
> all have the same type!), all their instances are all of type 'instance'.

Oops somthing disappeared in the copy/paste process:

    >>> class FooBar: pass
    ...

>     >>> type(FooBar) == type(Event)
>     True
>     >>> type(FooBar()) == type(Event())
>     True
>
> Whereas instances of new-style classes are of type their class:
>
>     >>> class NewFooBar(object): pass
>     ... 
>     >>> type(NewFooBar) == type(NewEvent)
>     True
>     >>> type(NewFooBar()) == type(NewEvent())
>     False
>
> However, in python 2.X (X > 2?), you can force all classes to of a
> certain type by setting the global variable '__metaclass__'. So:
>
>     >>> type(Event) # Event is an old-style class
>     <type 'classobj'>
>     >>> __metaclass__ = type
>     >>> class Event: pass
>     ... 
>     >>> type(Event) # Now Event is new-style!
>     <type 'type'>
>
> HTH
>
> -- 
> Arnaud


From fetchinson at googlemail.com  Mon May  5 16:27:38 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 5 May 2008 13:27:38 -0700
Subject: psycopg2 ReferenceManual
In-Reply-To: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
References: <5dc598e30804300752j1c36456bp40cf813754a01974@mail.gmail.com>
Message-ID: <fbe2e2100805051327m670f66fl28e69248f8d948c5@mail.gmail.com>

> Hi all, where can I find the reference manual from the psycopg2 or the
> dbapi2.0 because in their official pages I could'nt find
> thx
>
>

Once you have the source of any package you can create a reference manual
using e.g. epydoc.
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From larzluv at hotmail.com  Mon May 12 02:52:20 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 23:52:20 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
Message-ID: <b723971b-7d7c-49f6-a9a3-c7147db695c3@l64g2000hse.googlegroups.com>

On May 11, 11:42 pm, Larry Hale <larz... at hotmail.com> wrote:
> THANKS, AGAIN, for the reply!  :)
>
> Okay, now I -really- feel silly...  :>
>
> So, when I was going to try what you'd suggested, I noticed something
> peculiar: I hadn't "changed" anything on my system, but now, when I
> tried to "import magic" I got a missing DLL error.  For a DIFFERENT
> DLL!  This got me to thinking...
>
> Turns out, when I was having "success" earlier, I was -in- the C:
> \Program Files\GnuWin32\bin directory (where file.exe and related .dll
> files are).
>
> So I added C:\Program Files\GnuWin32\bin to the (system/Windows)
> PATH.  Everything worked.  I removed all the copious copies of the
> DLL, the magic files, etc., littering my hard drive in every other
> location.  Still worked.
>
> 'Course, I don't honestly know why it didn't work with the files
> copied to other locales contained in the sys/Py paths... perhaps it
> was, as you mentioned, wanting the tree-structure to be the same?  (I
> haven't the heart to check this out fully right now... *maybe* at a
> later time...  ;) )
>
> Yeah, I know.  But HONESTLY!  I could have -sworn- I'd already tried
> THAT... you know, all the "obvious"/"I've been programming/working in
> computers (albeit 'Windows' until lately) for ~25 years; yeah, I'm a
> 'hacker'..." stuff.  I -swear-!
>
> [EGG ON FACE]
>
> [SIGH]  Well, I'd say "live and learn", but I'm still scratching my
> head.  But, 'nough of that.  Thanks for your replies, Michael, and I'm
> off to work _with_ the module now, then work-up my HowTo (and
> experiment with making an "egg"?? ;) )...
>
> Caio!
> -Larry  :P  :)
>
> On May 11, 11:09 pm, Michael Torrie <torr... at gmail.com> wrote:
>
> > Larry Hale wrote:
> > > ALSO: I've even tried putting the 4 "magic" files INTO the .egg
> > > file... still no-go.  :/
>
> > It's often the custom of programs ported from unix to windows to use the
> > dll location as a key to find the other files that are typically in
> > share, or etc.  GTK, for example uses ../share and ../etc from the
> > location where the dlls are stored (if the dlls are in a folder called bin).
>
> > In this case I'd try making a folder in the Python25 folder called
> > "share" and put the contents of the gnuwin32 share/file stuff in there.
> >  Should look something like this:
>
> > c:/python25/share/file/magic.mime.mgc
> > c:/python25/share/file/magic
> > c:/python25/share/file/magic.mgc
> > c:/python25/share/file/magic.mime
>
> > Or, judging by a string I found in the dll itself, you might have to put
> > the files here:
>
> > c:/progra~1/File/share/file/magic
>
> > Although if such a path really is hardcoded into the dll, this is
> > certainly a bug, since it will fail on certain non-english windows systems.
>
> > Anyway, who knows.  Give these options a try.



UPDATE: HOORAY!!!  Well, actually, was about two steps forward, one
back.  But I've gotten it all sorted out now!  :)

I added C:\Program Files\GnuWin32\bin to the system/Windows PATH.
This takes care of the various required DLLs/libs.

The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
has the man pages.  I'd overlooked these as they were only modified as
necessary; the "BSD" part made me think they'd be the same as the same
online versions I'd already read (that were *nix specific).
Obviously, I was wrong.  These had the default paths to the magic*
files listed; C:\Program Files\File\share\file\.

If one creates said directory structure and moves/copies/unpacks the
magic ("database") files THERE, then one may do:

    >>> import magic
    >>> test = magic.Magic() # <-- New Magic class instance
    >>> test.from_file( 'C:\\startrek.exe' ) # <-- Yeah, I have an old
Star Trek game file here to test with...  :)
    'MS-DOS executable, MZ for MS-DOS'  # <-- This is what's
returned...

Alternately, if one wishes to leave/place the magic files elsewhere,
do like:

    >>> test = magic.Magic( magic_file = 'C:\\Program Files\\GnuWin32\
\share\\file\\magic' ) # <-- spec where/what the file is

NOTE: Even if the "magic_file" location *is* specified, "mime = True"
still works fine.  (Haven't checked, but I presume the source simply
tacks ".mime" to the filename automagically.)  Obviously/also, one
needn't specify the argument names if one uses proper argument order:
magic.Magic( mime, magic_file )  :)


THANKS SO MUCH, Michael, for your answers and helping me alone the
way...  :)


Cheers,
-Larry


From h.goebel at goebel-consult.de  Tue May 20 04:09:14 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Tue, 20 May 2008 10:09:14 +0200
Subject: Running commands on cisco routers using python
In-Reply-To: <2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>
References: <mailman.1350.1211210320.12834.python-list@python.org>
	<2d943acb-2ac8-4cfa-9aad-80fed7e1bb45@8g2000hse.googlegroups.com>
Message-ID: <4832872a$0$6504$9b4e6d93@newsspool4.arcor-online.net>

Mike Driscoll schrieb:
> On May 19, 10:18 am, SPJ <mail2... at yahoo.com> wrote:
>> Is it possible to run specific commands on cisco router using Python?
>> I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.
>>
>> Thanks,
>> SPJ
> 
> I think it depends on how you're connecting to the routers.
> Theoretically, you should be able to use Python's socket or ssh
> modules to connect to them, send commands and capture the output.

I've implemented a toolset for login into cisco components, issueing 
commands and fetchign the results. Works like a charm.

Keypoint here is using pexpect for interacting with SSH.

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From bignose+hates-spam at benfinney.id.au  Fri May 16 21:37:05 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 17 May 2008 11:37:05 +1000
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
Message-ID: <878wy9soce.fsf@benfinney.id.au>

amit.uttam at gmail.com writes:

> I've recently jumped big time into python and I'm working on a
> software program for testing automation.

Welcome, to both fields :-)

> I had a question about proper logging of output. What I would like
> is:
> 
>  1. a function syslog (to log output to log file only)
>  2. a function stdout (to log output to stdout only)
>  3. a function sslog (to log output to both log and stdout)
> 
> Right now I am using StandOut module

Have you investigated the 'logging' module in the Python standard
library <URL:http://www.python.org/doc/lib/module-logging>? It appears
to meet your listed requirements, without need of external
dependencies.

-- 
 \        "I went to the hardware store and bought some used paint. It |
  `\                   was in the shape of a house."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From mage2k at gmail.com  Thu May 15 21:12:29 2008
From: mage2k at gmail.com (Erik Jones)
Date: Thu, 15 May 2008 20:12:29 -0500
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
Message-ID: <86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>

On Thu, May 15, 2008 at 12:21 PM, Marcelo de Moraes Serpa <
celoserpa at gmail.com> wrote:

> Hello,
>
> So, I have this particular method, generate_chat_dir_string, which should
> generate a string in the following format:
>  "md5hexstring-day-month-year-hour-minute"
>
> This string will be used to create a directory in the filesystem.
>
> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
> methods of the Chat class, including this one. However, an issue just popped
> up, this is the test code:
>
>
>    1.   def test_generate_chat_dir_string(self):
>    2.         import md5
>    3.         import random
>    4.         import datetime
>    5.         md5_handler = md5.new()
>    6.         users = [{"user":"pedro","atendente":False},{
>    "user":"jo?o","atendente":True}]
>    7.         #salt = random.random().to_s()
>    8.         #md5_handler.update(salt)
>    9.         now = datetime.datetime.now()
>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>    11.         for user in users:
>    12.             md5_handler.update(user["user"])
>    13.
>    14.
>    15.         seed = md5_handler.hexdigest()
>    16.
>    17.         final_string = seed + "-" + ts
>    18.
>    19.         method_generated_string =
>    self.chat.generated_chat_dir_string(users,seed)
>    20.
>    21.         self.assertEquals(final_string,method_generated_string)
>
> As you can see, it generates a specific set of data and assembles a
> final_string. It then feeds the same data to generate_chat_dir_string and
> compare to see if the final_string is equal to the string generated by the
> tested method.
>
> However, they might not be equal becouse of the temporal data. In this case
> I'm not using seconds, but in a bizarre situation a minute could have passed
> and the test would faile becouse the two strings would have a different
> minute portion. Something like this:
>
> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"
>
> How could I handle this issue?
>
> Thanks in advance,


Add another parameter, with a default, to the method's interface:

def test_generate_chat_dir_string(self, now=None):
    if not now:
        import datetime
        now = datetime.datetime.now()
    .....


That way you can feed it values when testing to validate the calculations
but leave it up to the datetime module to fill in the used value in
production.



-- 
Erik Jones
mage2k at gmail.com
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From petr.poupa at gmail.com  Mon May 12 11:34:07 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 08:34:07 -0700 (PDT)
Subject: Socket and cycle problem
Message-ID: <67c1d643-5445-46c8-b00f-20238badd398@56g2000hsm.googlegroups.com>

Hello,
I am beginner but so I need help. I have small script for receive data
from port 3883, but it print only once.

import socket

HOST = 'localhost'
PORT = 3883
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
data = s.recv(2048)
s.close()
print 'receive data from server:', `data`

So I try to write cycle to this script, like this:

import socket

HOST = 'localhost'
PORT = 3883
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
while 1:
    s.connect((HOST, PORT))
    data = s.recv(2048)
    s.close()
    print 'receive data from server:', `data`

But Python reporting:

Traceback (most recent call last):
  File "C:\Documents and Settings\poupa\Plocha\TCP3.py", line 7, in
<module>
    s.connect((HOST, PORT))
  File "<string>", line 1, in connect
  File "C:\Python25\lib\socket.py", line 141, in _dummy
    raise error(EBADF, 'Bad file descriptor')
error: (9, 'Bad file descriptor')

Where is the mistake? I dont know.

thaks for help
Petr


From aspersieman at gmail.com  Thu May  8 03:54:59 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Thu, 08 May 2008 09:54:59 +0200
Subject: POP connection timeout.
Message-ID: <4822B1D3.1090200@gmail.com>

Hi All

I am have written an application that queries a POP mailbox and 
downloads messages. When the application tries to connect to the mail 
server, but takes too long (eg. longer than 60 seconds) I want to have 
it time out.

Something like

try:
    pop = poplib.POP3(POPHOST, POPPORT)
except someerror, err:
    print "Connecting to mail box has timed out:\n", err

I know that in python 2.5 I could pass an additional timeout parameter 
to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
TIMEOUTINSECONDS), but I am using python 2.4.

Can anyone help me implement this timeout functionality.

Regards

Nicol
-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From google at mrabarnett.plus.com  Mon May 26 18:07:16 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Mon, 26 May 2008 15:07:16 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<26d0b3d2-01cc-49bd-b284-1a849b0b835f@y38g2000hsy.googlegroups.com> 
	<34dcbdc1-5285-41ec-be06-c88c56bb0372@i76g2000hsf.googlegroups.com> 
	<hoE_j.50548$7a.47091@bignews1.bellsouth.net>
Message-ID: <0e7d5f8e-84b3-4da3-bd69-0b275e31720d@59g2000hsb.googlegroups.com>

On May 26, 8:43 pm, "inhahe" <inh... at gmail.com> wrote:
> I like to think of a language that would combine low-level and high-level
> features to be used at the programmer's whim.  C--, High Level Assembly, and
> C++ with in-line assembly are examples, but none of them come as high-level
> as Python. Other possible examples might be ctypes, numpy, array.array, and
> I heard a rumor that Python 3.0 might have optional type declarations.   My
> ideal language would be like a version of C++ (including in-line asm), or
> C-- with classes, that's compiled, but supports Python abstractions and
> features wherever possible (including doing away with {}'s and ;'s).
>
[snip]
The problem with in-line asm is that it's processor-specific; I think
that going lower level than C would be a mistake, except in very
special cases.


From ivan.illarionov at gmail.com  Wed May  7 21:19:02 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Thu, 8 May 2008 01:19:02 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no> <fvtf0p$6pj$1@news.mtu.ru>
	<mailman.731.1210209219.12834.python-list@python.org>
	<fvtk7v$864$1@news.mtu.ru>
Message-ID: <fvtke6$864$2@news.mtu.ru>

On Thu, 08 May 2008 01:15:43 +0000, Ivan Illarionov wrote:

> On Wed, 07 May 2008 21:13:27 -0400, Miles wrote:
> 
>> On Wed, May 7, 2008 at 7:46 PM, Ivan Illarionov
>>  <ivan.illarionov at gmail.com> wrote:
>>  > On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:
>>  >
>>  >  > Is there a way to do:
>>  >  > x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>  >  > x[0,2:6]
>>  >  >
>>  >  > That would return:
>>  >  > [0, 3, 4, 5, 6]
>>  >
>>  >  IMHO this notation is confusing.
>>  >
>>  >  What's wrong with:
>>  >  [0]+x[2:6]
>> 
>>  I think Yves meant to return [1, 3, 4, 5, 6], as in Perl's list
>>  slicing:
>> 
>>  my @x = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10); return @x[0, 2..6]; //
>>  returns (1, 3, 4, 5, 6)
> 
> So it should be x[0] + x[2:6] or x[0].extend(x[2:6])

Oh, I meant
[x[0]] + x[2:6]
or
y = [x[0]]
y.extend(x[2:6])

Sorry





From google at mrabarnett.plus.com  Wed May 21 15:14:00 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Wed, 21 May 2008 12:14:00 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
Message-ID: <471aa7ed-3241-466c-b599-e91c38db62fa@e39g2000hsf.googlegroups.com>

On May 21, 4:15 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Or just:
>
> > If command is "quit" ...
>
> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> for assigning and checking types.  For example, to read data from a
> file and check for errors:
>
>      Read data from "input.txt".
>      If data is an error then go to ...
>
> Or when assigning a type to an identifier:
>
>      HarmonicMean is a function(x, y) ...
>      LoopCount is a variable ...
>
> By using = only for equality and "is" only for types, the Flaming
> Thunder compiler can detect when either is being used incorrectly
> because the syntax for the two is incompatible.  That avoids the man-
> years of wasted debugging time spent on languages that accept
> statements that are easily confused, yet syntactically valid (e.g. the
> confusion between = and == in C if-statments, or the confusion between
> = (equality) and "is" (identity) in Python).
>
[snip]
I wonder whether "is" could be used both for "x is value" and "x is a
type" without causing a problem:

If command is a string ...

If command is "quit" ...


From arnodel at googlemail.com  Mon May 12 02:31:32 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 07:31:32 +0100
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <m2skwo2fuj.fsf@googlemail.com>

Yves Dorfsman <yves at zioup.com> writes:

> Is there anyway to tell python I don't care about a value ?
>
> Say I want today's year and day, I'd like to do something like:
>
> import time
> y, None, d, None, None, None, None = time.localtime()
>
> I know you can't assign anything to None, but I'm sure you get what I
> mean, a special keyword that means I don't care about this value. In
> this particular case, there's got to be a better way than:
>
> d = time.local()
> y = d[0]
> d = d[1]
>

I use Paul Rubin's solution (which is frown upon by many:), but it's
true it would be nice for tuples to have something like an extract()
method:

y, d = time.localtime.extract(0, 2)

Where 

    mytuple.extract(i1, i2, i3...)

would mean:

    tuple(mytuple[i] for i in (i1, i2, i3...))

Or perhaps allow indexing by tuples:

    mytuple[i1, i2, i3...]

-- 
Arnaud


From apardon at forel.vub.ac.be  Fri May 23 05:36:40 2008
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 23 May 2008 09:36:40 GMT
Subject: unittest: Calling tests in liner number order
Message-ID: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>

Some time ago I asked whether is would be possible that unittest would
perform the test in order of appearence in the file.

The answers seemed to be negative. Since I really would like this
behaviour I took the trouble of looking throught the source and
I think I found a minor way to get this behaviour.

Now my questions are:

Are other people interrested in this behaviour?
Does the following patch has a chance of being introduced in the
standard python distribution?

*** /usr/lib/python2.5/unittest.py      2008-04-17 16:26:37.000000000 +0200
--- unittest.py 2008-05-23 11:19:57.000000000 +0200
***************
*** 570,575 ****
--- 570,577 ----
          """
          def isTestMethod(attrname, testCaseClass=testCaseClass, prefix=self.testMethodPrefix):
              return attrname.startswith(prefix) and callable(getattr(testCaseClass, attrname))
+         def getlinenr(name):
+             return getattr(testCaseClass, name).im_func.func_code.co_firstlineno
          testFnNames = filter(isTestMethod, dir(testCaseClass))
          for baseclass in testCaseClass.__bases__:
              for testFnName in self.getTestCaseNames(baseclass):
***************
*** 577,582 ****
--- 579,586 ----
                      testFnNames.append(testFnName)
          if self.sortTestMethodsUsing:
              testFnNames.sort(self.sortTestMethodsUsing)
+         else:
+             testFnNames.sort(key=getlinenr)
          return testFnNames
  



From alex.m.gusarov at gmail.com  Tue May 27 08:00:36 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 19:00:36 +0700
Subject: integration with browser
In-Reply-To: <9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
References: <mailman.1608.1211798738.12834.python-list@python.org>
	<69vmlgF35akucU1@mid.uni-berlin.de>
	<mailman.1614.1211816283.12834.python-list@python.org>
	<6a0722F33j3q5U1@mid.uni-berlin.de>
	<9469c3170805270149q4b67e572rafc0dddf9e3e657e@mail.gmail.com>
Message-ID: <ac6dcb3d0805270500y40ae93c9t9c56713104919044@mail.gmail.com>

> Web developers usually check only 3 browser
> IE
> FF
> Opera
>
> I know that using an external engine limits the portability of the
> solutions, but i need something that works exaclty as the browser.
>

Really, try WebKit <http://webkit.org/> - Safari browser uses it.
Last releases of PyQt4
<http://www.riverbankcomputing.co.uk/software/pyqt/>(Qt, of course,
too) includes QWebKit -
WebKit <http://webkit.org/> wrappings.

--
Best regards, Alex Gusarov
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From python at bdurham.com  Fri May  2 12:40:21 2008
From: python at bdurham.com (python at bdurham.com)
Date: Fri, 02 May 2008 12:40:21 -0400
Subject: Preventing 'bad' filenames from raising errors in os.path
Message-ID: <1209746421.26496.1251103145@webmail.messagingengine.com>

Bad file names, i.e. filenames the OS considers illegal, will cause
functions in the os.path module to raise an error.

Example:

import os.path
print os.path.getsize( 'c:/pytest/*.py' )

On Windows XP using Python 2.5.2 I get the following traceback:

Traceback (most recent call last):
  File "<string>", line 74, in run_nodebug
  File "<Module1>", line 3, in <module>
  File "C:\Python\lib\ntpath.py", line 228, in getsize
    return os.stat(filename).st_size
WindowsError: [Error 123] The filename, directory name, or volume label
syntax is incorrect: 'c:/pytest/*.py'

Since there are many places a user can enter a path name (interactively,
via config files, etc) in most applications, is there an os sensitive
function that can be used to detect bad file names?

As a matter of best practice, how do you wrap your use of file and path
names to prevent unexpected failures? (There has to be a better
alternative than try/except blocks around each use of an os.path
function in one's code?)

Thanks,
Malcolm


From michael.pearmain at tangozebra.com  Fri May 16 18:14:53 2008
From: michael.pearmain at tangozebra.com (Mike P)
Date: Fri, 16 May 2008 15:14:53 -0700 (PDT)
Subject: Rpy Module
Message-ID: <4cbbf8ef-f123-47cd-b265-4d91925efa10@e39g2000hsf.googlegroups.com>

Hi experts,

I've just seen there is an R module, what i can't see easily is if you
can / how to import other modules for R into the Rpy module

Can anyone advise on this?

Cheers

Mike


From jon at ffconsultancy.com  Thu May  8 20:41:26 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Fri, 09 May 2008 01:41:26 +0100
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>
	<mailman.824.1210293106.12834.python-list@python.org>
Message-ID: <Ns-dnZ8edO1xA77VRVnyjAA@posted.plusnet>

Terry Reedy wrote:
> "Jon Harrop" <jon at ffconsultancy.com> wrote in message
> news:5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d at plusnet...
> | Perhaps the best example I can think of to substantiate your original
> point
> | is simple comparison because Mathematica allows:
> |
> |  a < b < c
> |
> | I wish other languages did.
> 
> Python does also.

Nice. :-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From wxPythoner at gmail.com  Sat May 10 16:59:37 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sat, 10 May 2008 13:59:37 -0700 (PDT)
Subject: Python, are you ill?
Message-ID: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>

If you are in the interactive prompt of the Python interpreter and you
do this

print """Testing\"""   or   print '''Testing\'''

you get three dots [...] as if Python expects a code block. If you
press Enter, you get three dots again, and again, and again... You
can't get out of the code block with pressing the Enter key; you have
to press Ctrl+Z (if you're in Linux) in order to get out of that code
block, which then throws you back to the Linux command line, but
before that it prints this line

[1]+  Stopped                 python


If you do

print "Testing\"   or   print 'Testing\'

you get an error, but not of you use the triple quotes. Is that a bug
in the interpreter perhaps?


From ohad.frand at percello.com  Tue May 13 04:16:51 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Tue, 13 May 2008 11:16:51 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F37@percello-sbs.percello.local>

Hi
Thanks a lot for your reply
I think the main uses for it is to study the language and to see that I
didn't miss anything else or that something is changed from one version
to another.

The keyword module will help me

Thanks again
Ohad Frand


-----Original Message-----
From: Gary Herron [mailto:gherron at islandtraining.com] 
Sent: Tuesday, May 13, 2008 11:11 AM
To: Ohad Frand
Cc: python-list at python.org
Subject: Re: question about python statements

Ohad Frand wrote:
> Hi Gary
>
> Sorry that I was not clear, I hope that this time I will explain
myself
> better.
>
> I can get list of all builtin functions in python by
dir(__builtins__).
> This return a list of string with most known names to python language
> such as: 
> [... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
> 'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow',
'property',
> 'quit', 'range', 'raw_input', 'reduce', 'reload'...]
>
> But I don't know how to generate the next list of builtin python
> statements:
>
['assert','break','class','continue','def','del','elif','else','except',
> 'exec','finally','for','from','global',
> 'if','import','pass','print','raise','return','try','while','yield']
>   

There is no way you can consider 'elif', 'else', 'except', and 'from' 
statements.  However, as someone pointed out, the kwlist from the 
keyword module is the closest thing we can think of to the list you are 
asking for.

On the other hand, what's wrong with constructing the list as you did in

your example above?


Just out of curiosity, *why* do you want this list.   Perhaps is we knew

that, we could think of a programmatic way to construct the list you 
want.   The biggest challenge at the moment is that we have no idea what

you mean by statement, but it is certainly not what Python considers 
statements.

Gary Herron



> Thanks,
> Ohad Frand
>
> -----Original Message-----
> From: Gary Herron [mailto:gherron at islandtraining.com] 
> Sent: Monday, May 12, 2008 10:41 PM
> To: Ohad Frand
> Cc: python-list at python.org
> Subject: Re: question about python statements
>
> Ohad Frand wrote:
>   
>> Hi
>>
>> I am looking for a way to programmically get a list of all python 
>> existing statements that I cannot access by __builtins__ or locals()
>>
>> (like ["assert","break","class",...])
>>
>> Thanks,
>>
>> Ohad
>>
>>
>>     
>
------------------------------------------------------------------------
>   
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>     
> Sorry, I've no idea what you mean here. Perhaps you could help us by 
> defining what you mean by
> "statements that I cannot access by __builtins__ or locals()"
>
> Is there any statement that you *can* access in such a way?
>
> What does it even mean to "access a statement"?
>
> Do you even have a list of "statements" from which we are to work? 
> Python is a little unusual in what it considers statements.
>
> Gary Herron
>
>
>
>
>   



From bignose+hates-spam at benfinney.id.au  Tue May 13 19:42:12 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 May 2008 09:42:12 +1000
Subject: Why can't I import this?
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
	<e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
Message-ID: <87lk2d4vqj.fsf@benfinney.id.au>

John Henry <john106henry at hotmail.com> writes:

> On May 13, 1:18 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > John Henry schrieb:
> >
> > > the class CodeEditor all exists and yet idle keep complaining
> > > that it can't import from PythonCard.tools.
> >
> > How do these complaints *look* - we can't read your mind nor your
> > screen, as you might imagine....
> 
> Thumper's dad always told him: If you don't have anything
> nice/useful/ garbage to say, then don't say noth'ng at all.

Thanks for the aphorism. You're still no closer to actually getting a
useful answer, until you can provide the information Diez explained
that we need.

-- 
 \          "I used to be a proofreader for a skywriting company."  -- |
  `\                                                     Steven Wright |
_o__)                                                                  |
Ben Finney


From arnodel at googlemail.com  Sat May  3 16:38:21 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 21:38:21 +0100
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
Message-ID: <m2ve1vkts2.fsf@googlemail.com>

Szabolcs Horv?t <szhorvat at gmail.com> writes:

> Arnaud Delobelle wrote:
>>
>> sum() works for any sequence of objects with an __add__ method, not
>> just floats!  Your algorithm is specific to floats.
>
> This occurred to me also, but then I tried
>
> sum(['abc', 'efg'], '')
>
> and it did not work.  Or is this just a special exception to prevent
> the misuse of sum to join strings?  (As I said, I'm only an occasional
> user.)

I think that's right: anything with an __add__ method, apart from
string, can be sum()ed.

-- 
Arnaud


From mgi820 at motorola.com  Mon May 12 12:38:23 2008
From: mgi820 at motorola.com (Gary Duzan)
Date: Mon, 12 May 2008 16:38:23 +0000 (UTC)
Subject: passing *args "recursively"
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <g09rpv$lbs$1@engnntp2.cig.mot.com>

In article <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9 at e53g2000hsa.googlegroups.com>,
Guillermo  <guillermo.listas at googlemail.com> wrote:
>
>Hi,
>
>This must be very basic, but how'd you pass the same *args several
>levels deep?
>
>
>def func2(*args)
>
>    print args # ((1, 2, 3),)
>    # i want this to output (1, 2, 3) as func1!
>    # there must be some better way than args[0]?
>
>def func1(*args):
>
>    print args # (1, 2, 3)
>    func2(args)
     func2(*args) # <<<<<<======
>
>func1(1,2,3)

					Gary Duzan
					Motorola H&NM




From gagsl-py2 at yahoo.com.ar  Fri May  2 17:54:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:54:00 -0300
Subject: Need help: Compiling Python-Code &In-Reply-To=
References: <mailman.483.1209761575.12834.python-list@python.org>
	<XPidnVS98e29F4bVnZ2dnUVZ_ramnZ2d@comcast.com>
Message-ID: <op.uajq4afmx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 18:39:36 -0300, Larry Bates <larry.bates at websafe.com`>  
escribi?:

> No real reason to get shutil involved in this.

...except memory usage; shutil.copyfileobj reads the input in chunks, but  
your version reads the whole file in memory. Depending on the file sizes,  
this might be an issue.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Mon May 12 13:29:06 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 18:29:06 +0100
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1>
	<48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
	<c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>
Message-ID: <m2k5hz2zz1.fsf@googlemail.com>

Paul Hankin <paul.hankin at gmail.com> writes:

> On May 12, 1:59 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>> On May 12, 1:30 pm, John Machin <sjmac... at lexicon.net> wrote:
>>
>> > Duncan Booth wrote:
>> [...]
>> > > I think the variant I came up with is a bit clearer:
>>
>> > > for i in range(1,101):
>> > >    print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else 'Buzz') or i
>>
>> > More than a bit clearer, IMO. How about
>> >      print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or i
>> > (or perhaps
>> >      print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz')) or i
>> > to save looking up the precedence rules) ?
>>
>> Stuff clarity!  How about
>>
>> for i in xrange(1, 101):
>>     print 'FizzBuzz'[4*(i%3>0):4+4*(i%5<1)] or i
>
> for i in xrange(1, 101):
>     print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

I like this, I can imagine plenty of use cases...

...in codegolf

-- 
Arnaud


From badmuthahubbard at gmail.com  Sun May  4 18:27:08 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Mon, 5 May 2008 01:27:08 +0300
Subject: Can I install Python 2.4 and 2.5 ?
In-Reply-To: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
References: <d97e6147-93ae-4b0e-b7df-71a61649770d@m3g2000hsc.googlegroups.com>
Message-ID: <8200bab70805041527r6a0d2e59pfbad10818d39fb78@mail.gmail.com>

I have both python2.4 and python2.5 as executables, and "python" as a
symbolic link to python2.4.  This is the default setup if you install
both from the Debian repositories, so probably with Ubuntu as well.
If you like you can change "python" to point to either one (or to any
other program, if you really want).  I don't have my win install in
front of me at the moment, but I know I do have both there as well.
-Chuckk

On Mon, May 5, 2008 at 1:01 AM, adolfo <aguirre.adolfo at gmail.com> wrote:
> I am reviewing various visualization programs (Scipy, PYGNL, etc) and
>  IDE?s. Some run on Python 2.4 others in 2.5.
>
>  Can I have both installed at the same time if I don?t run them
>  concurrently?
>
>  Now in Windows XP soon on Ubuntu 8
>
>  Appreciating your help,
>
>  Adolfo
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com

From jon at ffconsultancy.com  Thu May  8 14:02:18 2008
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 08 May 2008 19:02:18 +0100
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
Message-ID: <5NCdnRlmwIIt5L7VnZ2dnUVZ8sSrnZ2d@plusnet>

xahlee at gmail.com wrote:
> I'd like to introduce a blog post by Stephen Wolfram, on the design
> process of Mathematica. In particular, he touches on the importance of
> naming of functions.
> 
> ? Ten Thousand Hours of Design Reviews (2008 Jan 10) by Stephen
> Wolfram
>  http://blog.wolfram.com/2008/01/10/ten-thousand-hours-of-design-reviews/
> 
> The issue is fitting here today, in our discussion of ?closure?
> terminology recently, as well the jargons ?lisp 1 vs lisp2? (multi-
> meaning space vs single-meaning space), ?tail recursion?, ?currying?,
> ?lambda?, that perennially crop up here and elsewhere in computer
> language forums in wild misunderstanding and brouhaha.
> 
> The functions in Mathematica, are usually very well-name, in contrast
> to most other computing languages.

The mathematical functions are well named but many of the general
programming constructs are not even well defined, let alone well named.

For example, overloaded "Gamma" in Mathematica vs "gammainc" in MATLAB for
the incomplete gamma functions.

> In particular, the naming in 
> Mathematica, as Stephen Wolfram implied in his blog above, takes the
> perspective of naming by capturing the essense, or mathematical
> essence, of the keyword in question. (as opposed to, naming it
> according to convention, which often came from historical happenings)
> When a thing is well-named from the perspective of what it actually
> ?mathematically? is, as opposed to historical developments, it avoids
> vast amount of potential confusion.
> 
> Let me give a few example.
> 
> ? ?lambda?, widely used as a keyword in functional languages, is named
> just ?Function? in Mathematica. The ?lambda? happend to be called so
> in the field of symbolic logic, is due to use of the greek letter
> lambda ??? by happenstance. The word does not convey what it means.
> While, the name ?Function?, stands for the mathematical concept of
> ?function? as is.

Look at the "function" keyword in OCaml and F#. They also pattern match over
their input whereas Mathematica does not allow this in "Function".

> ? Module, Block, in Mathematica is in lisp's various ?let*?. The
> lisp's keywords ?let?, is based on the English word ?let?. That word
> is one of the English word with multitudes of meanings. If you look up
> its definition in a dictionary, you'll see that it means many
> disparate things. One of them, as in ?let's go?, has the meaning of
> ?permit; to cause to; allow?. This meaning is rather vague from a
> mathematical sense. Mathematica's choice of Module, Block, is based on
> the idea that it builds a self-contained segment of code. (however,
> the choice of Block as keyword here isn't perfect, since the word also
> has meanings like ?obstruct; jam?)

Bad example. Mathematica's "Block" implements what we all know as "Scope".
Mathematica's "Module" implements something most people have never needed
to learn (rewriting a subexpression with uniquely tagged identifiers to
disambiguate them from externals):

  In[1] := Module[{a}, a]
  Out[1] = a$617

> ? Functions that takes elements out of list are variously named First,
> Rest, Last, Extract, Part, Take, Select, Cases, DeleteCases... as
> opposed to ?car?, ?cdr?, ?filter?, ?filter?, ?pop?, ?shift?,
> ?unshift?, in lisps and perl and other langs.

You are comparing arrays in Mathematica to lists in other functional
languages. Mathematica is often asymptotically slower as a consequence,
with "Rest" being O(n):

  In[1] := AbsoluteTiming[Rest[Range[1, 1000000]];]
  Out[1] = {0.219, Null}

The equivalents over lists are all O(1) in SML, OCaml, F#, Haskell, Scala,
Lisp and Scheme and is called the "tail" of a list. For example, in F#:

  > time List.tl [1 .. 1000000];;
  Took 0ms
  val it : int list = ...

Perhaps the best example I can think of to substantiate your original point
is simple comparison because Mathematica allows:

  a < b < c

I wish other languages did.

-- 
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com/products/?u


From turian at gmail.com  Fri May  9 17:20:38 2008
From: turian at gmail.com (Joseph Turian)
Date: Fri, 9 May 2008 14:20:38 -0700 (PDT)
Subject: Property in derived class
Message-ID: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>

If I have a property in a derived class, it is difficult to override
the get and set functions: the property's function object had early
binding, whereas the overriden method was bound late.
This was previously discussed:
   http://groups.google.com/group/comp.lang.python/browse_thread/thread/e13a1bd46b858dc8/9d32049aad12e1c1?lnk=gst#9d32049aad12e1c1

Could someone demonstrate how to implement the proposed solutions that
allow the property to be declared in the abstract base class, and
refer to a get function which is only implemented in derived classes?

Thanks,
  Joseph


From mishok13 at gmail.com  Wed May 14 13:09:20 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Wed, 14 May 2008 20:09:20 +0300
Subject: built in list generator?
In-Reply-To: <482B1E8C.1010800@admailinc.com>
References: <87hcd14vo0.fsf@benfinney.id.au> <482B1E8C.1010800@admailinc.com>
Message-ID: <192840a00805141009t152d0e5fl5143359a3c43cbbd@mail.gmail.com>

2008/5/14 Ethan Furman <efurman at admailinc.com>:
>
>  Ben Finney wrote:
>
>
> Subject: Re: built in list generator?
>
> From: Ben Finney <bignose+hates-spam at benfinney.id.au>
>
> Date: Wed, 14 May 2008 09:43:43 +1000
>
> To: python-list at python.org
>
> To: python-list at python.org
>
> Newsgroups: comp.lang.python
>
>  "Diez B. Roggisch" <deets at nospam.web.de> writes:
>
>
>
>  globalrev schrieb:
>
>
>  if i want a list with all numbers between x and y is there a way to
> do this with an inbult function.
>
> i mean i can always construct a function to do this but is there
> soemthing like:
>
> nbrs = list(range(50,100, 2))
>
>  range *does* that. use xrange if all you want is to iterate.
>
>  Until Python 3.0, where 'range' returns an iterable.
>
>  Is there a thread somewhere of the discussion for this change?  I'm
> presuming range is used almost exclusively in loops where a change in the
> return type would have no negative effect.
>  --

http://mail.python.org/pipermail/python-dev/2003-April/034534.html

>  Ethan
>
> --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From bj_666 at gmx.net  Mon May 26 02:53:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 26 May 2008 06:53:24 GMT
Subject: Unhandled exceptions checking
References: <5bc79d5b-d22b-49a4-bab4-424230465818@y21g2000hsf.googlegroups.com>
	<98662402-0cf8-4fd4-9346-f17dea8fe23f@f24g2000prh.googlegroups.com>
	<0ccd6c54-ecd9-46e8-a1f6-5313f3d7a45d@w7g2000hsa.googlegroups.com>
Message-ID: <69v534F344q4lU2@mid.uni-berlin.de>

On Sun, 25 May 2008 21:00:01 -0700, Yosifov Pavel wrote:

> OK. I understand point of view of all responders.
> It seems I surmised why it's very difficult to do in tool like
> PyChecker: not only functions/methods but usual Python expression can
> mask potential exception source. And this tool must know how to parse
> every expression deep (to object protocol methods, for example). But
> it's possible in principle...

So which *specific* exceptions can be thrown by this function:

def f():
    raise globals()[raw_input()]()

Ciao,
	Marc 'BlackJack' Rintsch


From celoserpa at gmail.com  Thu May 15 21:44:17 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 22:44:17 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<86ac1b9c0805151812i20a40908l590b342b6f1e9f52@mail.gmail.com>
Message-ID: <1e5bcefd0805151844r2fba4141p29a0cf7d37a0a5ef@mail.gmail.com>

Thank you for the replies.

@Gabriel: I understand what you are saying. It all depends on what you want
to test. In this case, I wanted to test the algorithm of the method.  The
test_generate_chat_dir_string is meant to do just that: Check if the
generate_chat_dir_string generated a "valid" (according to the specs) string
for a "chat dir name".

It is not a integration nor a functional "unit" test, but it is a "real"
unit test in the sense that I created a test for each method and I exercised
the methods the following way:

 1) Got some data to test and...
 2) ... Generated an output "manually" in the test method that I knew were
the expected return of the tested method;
 3) Fed this data to the tested method and compared the manually generated
result with the return value of the method.

It is like testing a method that does a simple division:

def test_divide
  divdend = 10
  divisor = 2
  expected_result = 5
  self.assertEquals(mathprogram.divide(dividend,divisor),5)

The techniques you explained in your message sound more like functional
testing or integration + functional testing where multiple aspects of a
single functional unit are being exercised. Or am I wrong?

@Erik:

I solved the problem by replacing the datetime.datetime with a custom
instance in the test method body:

def my_test_method
   now = datetime.datetime.now()
   class my_custom_datetime(object):
        def now(self): return now
   datetime.datetime = my_custom_datetime()

works great. Thanks to Zalamander @ #python on EFNET ;)



On Thu, May 15, 2008 at 10:12 PM, Erik Jones <mage2k at gmail.com> wrote:

>
>
> On Thu, May 15, 2008 at 12:21 PM, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> wrote:
>
>> Hello,
>>
>> So, I have this particular method, generate_chat_dir_string, which should
>> generate a string in the following format:
>>  "md5hexstring-day-month-year-hour-minute"
>>
>> This string will be used to create a directory in the filesystem.
>>
>> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
>> methods of the Chat class, including this one. However, an issue just popped
>> up, this is the test code:
>>
>>
>>    1.   def test_generate_chat_dir_string(self):
>>    2.         import md5
>>    3.         import random
>>    4.         import datetime
>>    5.         md5_handler = md5.new()
>>    6.         users = [{"user":"pedro","atendente":False},{
>>    "user":"jo?o","atendente":True}]
>>    7.         #salt = random.random().to_s()
>>    8.         #md5_handler.update(salt)
>>    9.         now = datetime.datetime.now()
>>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>>    11.         for user in users:
>>    12.             md5_handler.update(user["user"])
>>    13.
>>    14.
>>    15.         seed = md5_handler.hexdigest()
>>    16.
>>    17.         final_string = seed + "-" + ts
>>    18.
>>    19.         method_generated_string =
>>    self.chat.generated_chat_dir_string(users,seed)
>>    20.
>>    21.         self.assertEquals(final_string,method_generated_string)
>>
>> As you can see, it generates a specific set of data and assembles a
>> final_string. It then feeds the same data to generate_chat_dir_string and
>> compare to see if the final_string is equal to the string generated by the
>> tested method.
>>
>> However, they might not be equal becouse of the temporal data. In this
>> case I'm not using seconds, but in a bizarre situation a minute could have
>> passed and the test would faile becouse the two strings would have a
>> different minute portion. Something like this:
>>
>> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-31"
>> "b2ef9c7b10eb0985365f913420ccb84a-30-10-2008-10-32"
>>
>> How could I handle this issue?
>>
>> Thanks in advance,
>
>
> Add another parameter, with a default, to the method's interface:
>
> def test_generate_chat_dir_string(self, now=None):
>     if not now:
>         import datetime
>         now = datetime.datetime.now()
>     .....
>
>
> That way you can feed it values when testing to validate the calculations
> but leave it up to the datetime module to fill in the used value in
> production.
>
>
>
> --
> Erik Jones
> mage2k at gmail.com
>
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From gagsl-py2 at yahoo.com.ar  Sat May 24 21:45:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 22:45:48 -0300
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
	<ae23c0ab-62e8-486c-b79b-a1672c1c666d@d45g2000hsc.googlegroups.com>
Message-ID: <op.ubosimdlx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 22 May 2008 14:05:42 -0300, MRAB <google at mrabarnett.plus.com> escribi?:
> On May 22, 3:20 pm, s0s... at gmail.com wrote:

>> > > In my case, what I'm doing is sending the return value through a
>> > > socket:
>>
>> > > sock.send(f.read())
>>
>>
> I would go with:
>
> f = file("filename", "rb")
> while True:
>     data = f.read(MAX_BUF_SIZE)
>     if not data:
>         break
>     sock.sendall(data)

Another way is to use the shutil module:

fin = open("filename", "rb")
fout = sock.makefile()
shutil.copyfileobj(fin, fout)

-- 
Gabriel Genellina



From lists at cheimes.de  Thu May  1 08:09:21 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 14:09:21 +0200
Subject: Python 2.6 and wrapping C libraries on Windows
In-Reply-To: <9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
References: <Gy2Sj.3199$PM5.2653@edtnps92>	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
Message-ID: <4819B2F1.9030100@cheimes.de>

illume schrieb:
> Hi,
> 
> after a little research it appears that win9x is not supported by the
> msvcr90.dll run time.
> 
> Can you confirm this Lenard?
> 
> Has anyone tested the new python binaries that link to msvcr90.dll on
> win9x machines?

It doesn't matter to use because Python 2.6 and 3.0 require at least
Windows 2000 SP4. The 9x, ME and NT series aren't supported any more.

Christian



From justjpm at aol.com  Wed May 28 11:19:04 2008
From: justjpm at aol.com (Jim)
Date: Wed, 28 May 2008 08:19:04 -0700 (PDT)
Subject: BadStatusLine error
Message-ID: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>

Hi

I get a BadStatusLine error (indicated below). Can anyone help with
how to
catch error in code before abort?

Thanks
Jim

Traceback (most recent call last):

  File
"C:\Python25\Lib\site-packages\pythonwin\pywin\framework
\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:Lookup.py", line 103, in <module>
    contents = urllib2.urlopen(url).read()
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 374, in open
    response = self._open(req, data)
  File "C:\Python25\lib\urllib2.py", line 392, in _open
    '_open', req)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 1100, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "C:\Python25\lib\urllib2.py", line 1073, in do_open
    r = h.getresponse()
  File "C:\Python25\lib\httplib.py", line 924, in getresponse
    response.begin()
  File "C:\Python25\lib\httplib.py", line 385, in begin
    version, status, reason = self._read_status()
  File "C:\Python25\lib\httplib.py", line 349, in _read_status
    raise BadStatusLine(line)
BadStatusLine



From needin4mation at gmail.com  Thu May  1 11:03:21 2008
From: needin4mation at gmail.com (jmDesktop)
Date: Thu, 1 May 2008 08:03:21 -0700 (PDT)
Subject: simple beginner question about lists and negative index
References: <c7424798-5b2c-4a72-8cfb-023ac067db71@w7g2000hsa.googlegroups.com>
Message-ID: <7ab85e64-1d0a-4332-b7c0-e46bd97870dd@2g2000hsn.googlegroups.com>

On May 1, 10:59?am, jmDesktop <needin4mat... at gmail.com> wrote:
> This program:
>
> s = 'abcde'
> i = -1
> for i in range (-1, -len(s), -1):
> ? ? print s[:i], i
>
> gives
>
> abcd -1
> abc -2
> ab -3
> a -4
>
> Why doesn't the first one have the e if -1 is the end of the list? ?In
> Dive Into Python it said that -1 was the end of the list. ?Thanks.
>
> it is from Chun's book, slightly modified by me to see the index.

Sorry.  It's because of the : right?  up to but not including.  Dive
into was just list[-1] not list[:-1].  I looked at the for while
before posting and then as soon as I posted I saw it.


From tjreedy at udel.edu  Thu May  8 20:39:38 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 20:39:38 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
Message-ID: <g006g5$a9d$1@ger.gmane.org>


"Luis Zarrabeitia" <kyrie at uh.cu> wrote in message 
news:200805081914.06459.kyrie at uh.cu...
| Btw, there seems to be a math problem in python with exponentiation...
| >>> 0**0
| 1
| That 0^0 should be a nan or exception, I guess, but not 1.

a**b is 1 multiplied by a, b times.  1 multiplied by 0 no times is 1.
But there are unenlighted people who agree with you ;-)
Wikipedia has a discussion of this.

tjr





From castironpi at gmail.com  Sun May 11 18:09:51 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 15:09:51 -0700 (PDT)
Subject: diffing and uniqing directories
References: <mailman.233.1209233669.12834.python-list@python.org> 
	<d0IVj.3118$17.1282@newssvr22.news.prodigy.net>
Message-ID: <8c38e218-ae6c-449b-951b-88ee3d849e24@m36g2000hse.googlegroups.com>

On May 11, 2:44?pm, Dan Stromberg <dstrombergli... at gmail.com> wrote:
> On Sat, 26 Apr 2008 23:44:17 +0530, Rustom Mody wrote:
> > Over years Ive collected tgz's of my directories. I would like to diff
> > and uniq them
>
> > Now I guess it would be quite simple to write a script that does a walk
> > or find through a pair of directory trees, makes a SHA1 of each file and
> > then sorts out the files whose SHA1s are the same/different. What is
> > more difficult for me to do is to write a visual/gui tool to help me do
> > this.
>
> > I would guess that someone in the python world must have already done it
> > [The alternative is to use some of the tools that come with version
> > control systems like git. But if I knew more about that option I would
> > not be stuck with tgzs in the first place ;-)]
>
> > So if there is such software known please let me know.
>
> > PS Also with the spam flood that has hit the python list I dont know if
> > this mail is being read at all or Ive fallen off the list!
>
> It doesn't have a GUI, but here's a python program I wrote for dividing
> large collections of files up into identical groups:
>
> http://stromberg.dnsalias.org/~strombrg/equivalence-classes.html- Hide quoted text -
>
> - Show quoted text -

I want to question terminology!

Question 'identical' groups over related!



From ivan.illarionov at gmail.com  Sat May  3 19:12:56 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 23:12:56 +0000 (UTC)
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com> <fvilul$15ti$1@news.mtu.ru>
	<mailman.507.1209854174.12834.python-list@python.org>
Message-ID: <fvirho$15ti$2@news.mtu.ru>

On Sun, 04 May 2008 00:31:01 +0200, Thomas Dybdahl Ahle wrote:

> On Sat, 2008-05-03 at 21:37 +0000, Ivan Illarionov wrote:
>> On Sat, 03 May 2008 20:44:19 +0200, Szabolcs Horv?t wrote:
>> 
>> > Arnaud Delobelle wrote:
>> >> 
>> >> sum() works for any sequence of objects with an __add__ method, not
>> >> just floats!  Your algorithm is specific to floats.
>> > 
>> > This occurred to me also, but then I tried
>> > 
>> > sum(['abc', 'efg'], '')
>> 
>> Interesting, I always thought that sum is like shortcut of
>> reduce(operator.add, ...), but I was mistaken.
>> 
>> reduce() is more forgiving:
>> reduce(operator.add, ['abc', 'efg'], '' ) # it works 'abcefg'
> 
> Hm, it works for lists:
> sum(([1], [2]), [])
> [1, 2]
> 
> However I find the seccond argument hack ugly. Does the sum way have any
> performance advantages over the reduce way?

Yes, sum() is faster:

$ python -m timeit "" "sum([[1], [2], [3, 4]], [])"
100000 loops, best of 3: 6.16 usec per loop

$ python -m timeit "import operator" \
"reduce(operator.add, [[1], [2], [3, 4]])"
100000 loops, best of 3: 11.9 usec per loop

-- 
Ivan


From saluk64007 at gmail.com  Sat May 24 16:36:19 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sat, 24 May 2008 13:36:19 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
Message-ID: <c3f69bf60805241336t22592f01r5c16176ef2a05b27@mail.gmail.com>

I can see both sides of this argument, and I think TDD is great in some
cases and not so great in others.  I have used it before, but don't use it
often, as the programs I write are very difficult to automatically test.
(Games, which many of the bugs have to do with whether an optimization
produces a visual artifact or not etc.  Not possible to test that!)

As far as time spent testing, it obviously various per project, person, and
methodology.  But I think you have some misconceptions about coding time.
With TDD, you cannot measure test writing and code separately.  Here's why.

When you write code and then write a test for it, you spend a lot of time
thinking about how the code is going to look while you are writing the
code.  You plan what the code is going to look like, what arguments are
going to be passed to a function, how the code might be used by other code,
etc.  This is thinking time, with no code written.  This is also interleaved
with the actual time spent writing the code.  (You are thinking of the plan
while you are typing the actual code).  Then you will likely do some sort of
debugging at least, if not writing a test.  This doesn't take much thought
as you have already front loaded the thought.  "Well I should print here to
make sure this line is correct."

>From a TDD perspective, most of the actual time is fairly the same, just
shifted around.  The thought process that I mentioned, of how code is going
to be used or how it fits the system, instead of being hinged on the code,
is now hinged on writing the test.  This makes the thought process more
formal than in the other methodology.  Instead of thinking of one thing (how
a function may be used) while doing something else (writing an if statement
within some logic), you are actually writing code based on the system
instead of the internal logic.  Then, you write some code that makes it
work.  In many cases, (and in my experience) the actual code is easier to
write in TDD, because it is more focused and directed.  I am not writing one
thing and keeping in mind other things.  You think, plan, and then write to
spec.  It is most certainly a more formal process, and can be hard to get
used to.

And it doesn't work in all situations of course.

But timewise it seems like all the processes are the same.  Without tdd, you
might, instead of writing a test per say, still spend that time writing a
doc string, or just looking at where a function will be used to see what the
code should look like etc.  I think though that test-first streamlines
things a bit.  By itself I don't think it makes the process faster, and that
front work of writing the tests can definitely feel slower.  Further on is
where you have the most benefit of having tests.  And with practice you can
get faster at it too.

Most programmers have their own methodology that they have used for a while,
so they are fast at it.  Any change in that is going to be extremely
sluggish until you are used to it.  You should try TDD at least once for a
small or medium project and go all the way through with it just to get a
feel for it.  If you can afford to of course :)
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From lists at cheimes.de  Sat May 17 08:59:51 2008
From: lists at cheimes.de (Christian Heimes)
Date: Sat, 17 May 2008 14:59:51 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>
Message-ID: <482ED6C7.8010603@cheimes.de>

inhahe schrieb:
> what is going on here, and how do I compile these external libraries? 

I assume you are trying to compile Python 2.5 with VS 9.0. It's not
supported. Some extensions don't compile under VS 9.0

Christian



From arnodel at googlemail.com  Sat May 31 04:19:12 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 09:19:12 +0100
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <m2fxryc2db.fsf@googlemail.com>

Cameron <cameronlarue at gmail.com> writes:

> I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
> Graham article</a> and he builds an accumuator generator function in
> the appendix. His looks like this:
>
> <pre>
> def foo(n):
>   s = [n]
>   def bar(i):
>     s[0] += i
>     return s[0]
>   return bar
> </pre>
>
> Why does that work, but not this:
>
> <pre>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar
> </pre>

Others have explained why, but this looks like "pythonized LISP" to
me.  I would rather use a generator function:

def foo(n):
    while True:
        n += yield n

Although the problem is that you can't send it values the first time
round!

>>> bar = foo('s')
>>> bar.next()
's'
>>> bar.send('p')
'sp'
>>> bar.send('am')
'spam'

But: 

>>> bar = foo(3)
>>> bar.send(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't send non-None value to a just-started generator
>>> 

-- 
Arnaud


From gandalf at shopzeus.com  Wed May 28 07:04:23 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 28 May 2008 13:04:23 +0200
Subject: datetime.stdptime help
In-Reply-To: <j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
References: <mailman.1653.1211902484.12834.python-list@python.org>	<871e60df-fbf7-4fe5-ba45-d409e577f933@2g2000hsn.googlegroups.com>
	<j6adnelfdrFl_6HVnZ2dnUVZ_s_inZ2d@earthlink.com>
Message-ID: <483D3C37.50305@shopzeus.com>


> 	Out of curiosity -- just what zone /is/ "BDT"... The only thing that
> comes to mind is a type for "BST" (British Summer Time)
>   
I think you are right. This date string was taken from a .co.uk site. :-)

My fault. It was a 3 letter code after a date, I was sure that it is a 
time zone. Apparently, it is not. :-)

The "did not match format" message was misleading me. It would be better 
to throw ValueError("Unknown time zone: BDT"). :-)

Thank you,

   Laszlo



From sn at sncs.se  Tue May 27 10:19:29 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 07:19:29 -0700 (PDT)
Subject: New chairman
Message-ID: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>

seems to be needed

He doesn't seem to care much anyway now

Or if he cares, he have many other assignments

So should we try to elect a new chairman?

I am probably not eligible. There must be many others.!

Do you dare?consper

S.


From robert.spilleboudt.no.sp.am at skynet.be  Mon May 12 09:08:15 2008
From: robert.spilleboudt.no.sp.am at skynet.be (Robert.Spilleboudt )
Date: Mon, 12 May 2008 15:08:15 +0200
Subject: Saving an audio file's waveform into an image
In-Reply-To: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
References: <5ee7c96e-0301-438f-81f1-b6d46236115c@i36g2000prf.googlegroups.com>
Message-ID: <4828413F.6090709@skynet.be>

I am using Snack to process the audio signal of a rc transmitter.
Look at
http://www.speech.kth.se/snack/
Another audio processing: PortAudio and the Python module PyAudio. Look 
at http://people.csail.mit.edu/hubert/pyaudio/
Robert

Julien wrote:
> Hi,
> 
> I would like to pull out the waveform of an audio file and save it
> into an image file, for example in GIF format. Is that achievable, and
> if so, how?
> 
> I heard about the Snack module, but the project looks dead and un-
> maintained.
> 
> Your advice would be greatly appreciated.
> 
> Thanks!
> 
> Julien


From lucaspm at dcc.ufba.br  Thu May  8 13:48:43 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Thu, 8 May 2008 14:48:43 -0300
Subject: "prove"
In-Reply-To: <18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>
References: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
	<18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>
Message-ID: <9f4be2240805081048s51d61b30l5b5d41e6caf4fad8@mail.gmail.com>

Thanks Marco, this is just what I was looking for.

On Thu, May 8, 2008 at 11:02 AM, David <wizzardx at gmail.com> wrote:
> >  classname.functionname(objectname)
>
>  Do you mean something like this?
>
>  class myclass:
>     @staticmethod
>     def myfunction(myobject): pass
>
>  myobject = None
>  myclass.myfunction(myobject)
No, but thanks for the link, very useful.


From wuwei23 at gmail.com  Mon May 12 04:01:47 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 12 May 2008 01:01:47 -0700 (PDT)
Subject: module global variables
References: <dea76bc5-9152-41e2-b59f-5cf84c8eda21@y21g2000hsf.googlegroups.com>
Message-ID: <cbac524f-a7f0-4cbb-b529-d78a152edcc9@n1g2000prb.googlegroups.com>

On May 12, 5:17 pm, pistacchio <pistacc... at gmail.com> wrote:
> hi to all!
> can i load a module passing to it, automatically and as default, all
> the caller's global variables to act as module's global variables?
> thanks

module = __import__('module', globals=globals())

I think that's what you're looking for.

- alex23


From Scott.Daniels at Acm.Org  Sun May 25 15:41:28 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 12:41:28 -0700
Subject: Code correctness, and testing strategies
In-Reply-To: <87ve139oth.fsf@benfinney.id.au>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<87ve139oth.fsf@benfinney.id.au>
Message-ID: <ZZ-dndA6oPVNI6TVnZ2dnUVZ_gCdnZ2d@pdx.net>

Ben Finney wrote:
> David <wizzardx at gmail.com> writes:
>> You need to justify the extra time spent on writing test code.
> 
> From the perspective of someone who once thought this way, and then
> dug in and did Behaviour Driven Development, I can tell you the time
> is entirely justified: by better design, more maintainable code,
> higher confidence when speaking to customers, high visibility of
> progress toward completion, freedom to refactor code when it needs it,
> and many other benefits.

David,  here's another way to convince yourself you have the time:
For the next week, count how many times you repeat the same "hand-test"
of some code on a subsequent version.  Think of how much time that can
add up to if you no longer do that; you had-tesing time is subtracting
from the time you have to do unit tests.

--Scott David Daniels
Scott.Daniels at Acm.Org


From wizzardx at gmail.com  Sun May  4 14:25:03 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 20:25:03 +0200
Subject: HTTP Error code Info
In-Reply-To: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>
References: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>
Message-ID: <18c1e6480805041125se5a1cdfxbe534f108d7f57d1@mail.gmail.com>

> block.  Is there any better way to get the HTTP Error code using urllib2
> lib. Something like know the  exact  response number (200, 404 etc) without
> the above block.

Python libraries usually throw exceptions to indicate error conditions.

If this is a problem in your app then can write a wrapper function
which captures the HTTPError exception, extracts the code, and returns
it to the caller.

David.


From robert.kern at gmail.com  Fri May  2 16:15:07 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 02 May 2008 15:15:07 -0500
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <CeuSj.107251$rd2.30692@pd7urf3no>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <fvfsoc$c4f$1@ger.gmane.org>

Yves Dorfsman wrote:
> On UNIX, some people use
> #!/usr/bin/env python
> 
> While other use
> #!/usr/bin/python
> 
> Why is one preferred over the other one ?

Caveat: I've only read *most* of this thread, so maybe someone else has already 
made the following point.

It depends on the context. Ultimately, when your script is installed, it (almost 
certainly) should point to the precise Python executable the installer intends 
it to run on. One of the features of distutils is that it will *rewrite* 
"#!/usr/bin/env python" to use the exact executable that the installer used to 
execute the setup.py.

So *as a developer* I recommend writing your scripts with "#!/usr/bin/env 
python". This lets distutils select the correct executable, and it lets your 
users play around with your scripts prior to installation without needing to 
rewrite the shebang line manually. I hate trying out someone's code just to find 
that that they hardcoded /usr/local/bin/python2.3. If you aren't using distutils 
to install for some reason, you might want to recommend that the installer 
change the shebang line in your installation instructions.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From michael.hines at yale.edu  Sun May 25 09:37:15 2008
From: michael.hines at yale.edu (Michael Hines)
Date: Sun, 25 May 2008 09:37:15 -0400
Subject: raising an exception when multiple inheritance involves same
	baseThank
Message-ID: <1211722635.13961.57.camel@localhost.localdomain>

Thanks very much, Arnaud. That is exactly the hint I needed. Since it is
not multiple inheritance per se I prohibit but only multiple inheritance
involving more than one HocObject class, I replaced your len(bases) > 1
test with
<code>
    m = False
    for b in bases :
      if hasattr(b, '__mro__'):
        for bb in b.__mro__ :
          if bb == MetaHocObject.ho :
            if m == True:
              raise Exception("Inheritance of multiple HocObject not
allowed")
            m = True

</code>
to get

class A(HocObject): pass

class B(object): pass

class C(): pass

class D(C, B, HocObject): pass # ok

class D(C, A, HocObject): pass # fail

When I fold this idea into my code I may even try to eliminate the class
factory aspect of
class Foo(hclass(h.Vector))
in favor of
class Foo(h.Vector)

Thanks again,
Michael




From matthieu.brucher at gmail.com  Thu May 29 12:21:19 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Thu, 29 May 2008 18:21:19 +0200
Subject: should I put old or new style classes in my book?
In-Reply-To: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
References: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>
Message-ID: <e76aa17f0805290921s4f35a624qb83a47a9c0768425@mail.gmail.com>

Hi,

New style classes should be put as the default. This is what I did, based on
the principle that new classes were introduces in Python 2.2 and that we are
now at 2.5 and soon 2.6.
Tutorials that use old style classes may be old and perhaps won't be updated
ever. That's not a problem. Just tell people that there are two styles, but
that new style classes are far more powerful and do what you think they
should do.

Matthieu

2008/5/29 <allendowney at gmail.com>:

> Hi All,
>
> I am working on a revised edition of How To Think Like a Computer
> Scientist,
> which is going to be called Think Python.  It will be published by
> Cambridge
> University Press, but there will still be a free version under the GNU
> FDL.
>
> You can see the latest version at thinkpython.com; I am revising now,
> so
> I welcome all comments, suggestions, corrections, etc.
>
> Anyway, I am posting to ask about the current status of new style
> classes.
> I am planning to present only one style in the book, because the
> differences
> between them don't matter for anything I am doing in the book.
>
> The current edition of the book presents old style classes.  I am
> considering
> switching to new style classes on the assumption that this should be
> the default
> choice for new programs.  The drawback is that a lot of the online
> documentation
> still uses old style classes.
>
> Thanks for any guidance you can provide.
>
> Cheers,
> Allen
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From matt.trevor at gmail.com  Thu May 22 20:44:55 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:44:55 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <08a42153-573a-431c-bcc7-485ccf5b8f9c@b5g2000pri.googlegroups.com>

On May 23, 2:14 am, cm_gui <cmg... at gmail.com> wrote:
> I've yet to see a web application written in Python which is really
> fast.

Then stop looking at your own inept Python code and open your eyes.



From saptarshi.guha at gmail.com  Mon May 19 03:14:25 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Mon, 19 May 2008 00:14:25 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<69ckkgF31kls5U1@mid.uni-berlin.de>
Message-ID: <acb42f90-a025-4b02-81fa-7ad0a8560665@26g2000hsk.googlegroups.com>

Yes, that could be the case. Browsing through hadoop's source, i see
stdin in the above code is reading from piped Java DataOutputStream.
I read of a libray on the net Javadata.py that reads this but it has
disappeared.
What is involved in reading from a Dataoutputstream?

Thank you
Sapsi


From cameronlarue at gmail.com  Fri May 30 17:53:18 2008
From: cameronlarue at gmail.com (Cameron)
Date: Fri, 30 May 2008 14:53:18 -0700 (PDT)
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
	<6ab4u7F35bmisU1@mid.uni-berlin.de>
Message-ID: <11c56180-f3b1-4ff7-83fe-56dffb1d532b@c19g2000prf.googlegroups.com>

On May 30, 1:04?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Cameron schrieb:
>
>
>
> > I was reading this <a href="thishttp://www.paulgraham.com/icad.html">Paul
> > Graham article</a> and he builds an accumuator generator function in
> > the appendix. His looks like this:
>
> > <pre>
> > def foo(n):
> > ? s = [n]
> > ? def bar(i):
> > ? ? s[0] += i
> > ? ? return s[0]
> > ? return bar
> > </pre>
>
> > Why does that work, but not this:
>
> > <pre>
> > def foo(n):
> > ? s = n
> > ? def bar(i):
> > ? ? s += i
> > ? ? return s
> > ? return bar
> > </pre>
>
> Because python's static analysis infers s as being a variable local to
> bar in the second case - so you can't modify it in the outer scope.
>
> In the future, you may declare
>
> def bar(i):
> ? ? ?nonlocal s
> ? ? ?...
>
> Diez

thanks for the response. Just to make sure I understand- Is the reason
it works in the first case because s[0] is undefined at that point (in
bar), and so python looks in the outer scope and finds it there?

Cameron



From bignose+hates-spam at benfinney.id.au  Mon May 19 19:05:34 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 May 2008 09:05:34 +1000
Subject: unittest, how to recursively run tests?
References: <08e8e41a-cb7e-45c4-a250-133826f02144@a9g2000prl.googlegroups.com>
Message-ID: <87bq31j3nl.fsf@benfinney.id.au>

fredbasset1000 at gmail.com writes:

> Does anyone know of a good way to execute all unit tests present in a
> project from the project root dir?
> Ideally I'd like a mechanism that does not require the tests/files to
> be manually listed in the source (e.g. via the suite mechanism).

nose: A discovery-based unittest extension.

    <URL:http://somethingaboutorange.com/mrl/projects/nose/>

Available in Debian GNU/Linux in the 'python-nose' package; probably
available in most others too.

-- 
 \         "Simplicity and elegance are unpopular because they require |
  `\           hard work and discipline to achieve and education to be |
_o__)                                appreciated." ?Edsger W. Dijkstra |
Ben Finney


From tavares at fe.up.pt  Fri May  9 14:06:12 2008
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: Fri, 9 May 2008 11:06:12 -0700 (PDT)
Subject: =?windows-1252?Q?Special_Track_=93Computational_Bioimaging_and_Visual?=
	=?windows-1252?Q?ization=94_within_the_ISVC08_USA_=2D_Announce_=26_Call_for_Papers?=
Message-ID: <d439ab68-1257-4951-90f3-665ebeba97ce@f36g2000hsa.googlegroups.com>

-----------------------------------------------------------------------------------------------------------------------------------------

(Apologies for cross-posting)

Special Track ?Computational Bioimaging and Visualization?
International Symposium on Visual Computing (ISVC08)
Las Vegas, Nevada, USA, December 1-3, 2008
http://www.isvc.net

We would appreciate if you could distribute this information by your
colleagues and co-workers.

-----------------------------------------------------------------------------------------------------------------------------------------

Dear Colleague,

Within the ISVC08 - International Symposium on Visual Computing
(http://www.isvc.net), to be held in Las Vegas, Nevada, USA, in
December 1-3, 2008, we are organizing the Special Track ?Computational
Bioimaging and Visualization?.
The main goal of the Special Track ?Computational Bioimaging and
Visualization? is to bring together researchers involved in the
related fields (Image Acquisition, Image Segmentation, Objects
Tracking, Objects Matching, Shape Reconstruction, Motion and
Deformation Analysis, Medical Imaging, Scientific Visualization,
Software Development, Grid Computing, etc.), in order to set the major
lines of development for the near future.
Therefore, this Special Track will bring researchers representing
various fields related to Computational Vision, Computer Graphics,
Computational Mechanics, Scientific Visualization, Mathematics,
Statistics, Medical Imaging, etc. Thus, it will endeavor to contribute
to obtain better solutions for more realistic computational ?living?
models from images, and attempts to establish a bridge between the
researchers from these diverse fields.

Due to your research activities in those fields, we would like to
invite you to submit your work and participate in the Special Track
?Computational Bioimaging and Visualization?.


Topics

In this Special Track the following topics will be considered (not
limited to):

- Image Processing and Analysis for Computational Bioimaging and
Visualization;
- Segmentation, Reconstruction, Tracking and Motion Analyse in Medical
Images;
- Biomedical Signal and Image Acquisition and Processing;
- Objects Simulation and Virtual Reality;
- Computer Aided Diagnosis, Surgery, Therapy, Treatment and
Telemedicine Systems;
- Software Development for Computational Bioimaging and Visualization;
- Grid and High Performance Computing for Computational Bioimaging and
Visualization.

Submission/Proceedings

Instructions for authors are available in the website of ISVC'08
(http://www.isvc.net/author.html).
Authors should submit electronically their contributions through the
website of ISVC'08 (http://www.isvc.net), selecting the Special Track
?Computational Bioimaging and Visualization?.
Accepted papers will appear in the symposium proceedings which will be
published by Springer-Verlag in the Lecture Notes in Computer Science
(LNCS) series.

Important dates

- Submission deadline: July 21, 2008;
- Notification of acceptance: September 1, 2008;
- Camera-ready version: September 15, 2008.

Scientific Committee

Alberto De Santis, Italy
Ana Mafalda Reis, Portugal
Arrate Mu?oz Barrutia, Spain
Barbara Caputo, Switzerland
Chang-Tsun Li, UK
Christos E. Constantinou, USA
Constantine Kotropoulos, Greece
Daniela Iacoviello, Italy
Dinggang Shen, USA
Eduardo Borges Pires, Portugal
Enrique Alegre Guti?rrez, Spain
Filipa Sousa, Portugal
Francisco Perales, Spain
Gerhard A. Holzapfel, Sweden
H?lder C. Rodrigues, Portugal
Hemerson Pistori, Brasil
Jo?o Manuel R. S. Tavares, Portugal
Jorge M. G. Barbosa, Portugal
Jorge S. Marques, Portugal
Jose M. Garc?a Aznar, Spain
Lu?s Paulo Reis, Portugal
Manuel Gonz?lez Hidalgo, Spain
Maria Elizete Kunkel, Germany
Michel A. Audette, Germany
Miguel Angel Guevara, Cuba
Patrick Dubois, France
Renato M. N. Jorge, Portugal
Reneta P. Barneva, USA
Roberto Bellotti, Italy
Sabina Tangaro, Italy
Samrat Goswami, USA
S?nia I. Gon?alves-Verheij, The Netherlands
Valentin Brimkov, USA
Yongjie Zhan, USA
Xavier Roca Marv?, Spain


With kind regards,

Jo?o Manuel R. S. Tavares - University of Porto, Portugal
(tavares at fe.up.pt)
Renato Natal Jorge - University of Porto, Portugal (rnatal at fe.up.pt)
Samrat Goswami - University of Texas at Austin, USA (tarmas at gmail.com)
(Organizers of the Special Track ?Computational Bioimaging and
Visualization)


From Sengly.Heng at gmail.com  Sun May 18 00:49:41 2008
From: Sengly.Heng at gmail.com (Sengly)
Date: Sat, 17 May 2008 21:49:41 -0700 (PDT)
Subject: Python library for clustering from distance vector
Message-ID: <101cfef8-ecd2-409a-8701-905780a7862e@q24g2000prf.googlegroups.com>

Dear all,

I am looking for a python library which can cluster similar objects
into their respective groups given their similarity score of each two
of them. I have searched the group but I couldn't find any helpful
information yet.

Any suggestion is appreciated. Also, if you know any specific group
that I should post this message, please also suggest.

Thank you.

Sengly


From gnewsg at gmail.com  Sun May  4 10:49:55 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Sun, 4 May 2008 07:49:55 -0700 (PDT)
Subject: Determine socket family at runtime
Message-ID: <30bafd19-c822-41b6-8e17-ea004ba30821@t54g2000hsg.googlegroups.com>

Hi there,
since the socket.socket.family attribute has been introduced only in
Python 2.5 and I need to have my application to be backward compatible
with Python 2.3 and 2.4 I'd like to know how could I determine the
family of a socket.socket instance which may be AF_INET or AF_INET6.
Is there some kind of getsockopt() directive I could use?
For now I've been able to determine the family by using:

# self.socket = a connected socket.socket instance
ip, port = self.socket.getsockname()[0:2]
af = socket.getaddrinfo(ip, port)[0][0]

...but I'd like to know if some other solution is preferable.



Thanks.


--- Giampaolo
http://code.google.com/p/pyftpdlib


From inhahe at gmail.com  Tue May 27 02:42:42 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 27 May 2008 02:42:42 -0400
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<mailman.1634.1211868017.12834.python-list@python.org>
Message-ID: <m2O_j.17782$hv2.6558@bignews5.bellsouth.net>

Well, I just need it once in a while.  Actually now is the only time I 
remember.  The last time what I needed was a file name extension.  I want a 
string called headers, but I want to derive a dict from it, also called 
headers.  So I figured the string would be called strHeaders, and the dict, 
dctHeaders probably, but when a precedent for something like that exists, I 
like to use it.

"Kam-Hung Soh" <kamhung.soh at gmail.com> wrote in message 
news:mailman.1634.1211868017.12834.python-list at python.org...
> inhahe wrote:
>> Does anybody know of a list for canonical prefixes to use for hungarian 
>> notation in Python?  Not that I plan to name all my variables with 
>> hungarian notation, but just for when it's appropriate.
>
> I used simple Hungarian notation when I started programming in Python 
> (e.g. "s" for strings, "l" for lists, "d" for dictionaries).  As my 
> programming style became more "Pythonic" and I chose better variable 
> names, I stopped using Hungarian notation.
>
> YMMV.
>
> -- 
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>
> 




From skanemupp at yahoo.se  Tue May 27 21:20:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 27 May 2008 18:20:06 -0700 (PDT)
Subject: confused by HTMLParser class
Message-ID: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>

tried all kinds of combos to get this to work.


http://docs.python.org/lib/module-HTMLParser.html



from HTMLParser import HTMLParser

class MyHTMLParser(HTMLParser):

    def handle_starttag(self, tag, attrs):
        print "Encountered the beginning of a %s tag" % tag

    def handle_endtag(self, tag):
        print "Encountered the end of a %s tag" % tag


from HTMLParser import HTMLParser
import urllib
import myhtmlparser

x = MyHTMLParser(HTMLParser())
site = urllib.urlopen("http://docs.python.org/lib/module-
HTMLParser.html")
for row in site:
    print x.handle_starttag()


From stanc at al.com.au  Thu May  1 01:16:15 2008
From: stanc at al.com.au (Astan Chee)
Date: Thu, 01 May 2008 15:16:15 +1000
Subject: tool to calculate color combination
In-Reply-To: <48193734.4010108@al.com.au>
References: <48193734.4010108@al.com.au>
Message-ID: <4819521F.70609@al.com.au>

Dont worry about this. I've figured it out. Rather simple :
red = sum of for each red (50/100) * 1
green = sum of for each green (50/100) * 0
blue = sum of for each blue(50/100) * 0

Astan Chee wrote:
> Hi,
> I was just wondering if there is a tool/script in python that allows 
> me to do color calculations; specifically, when I add them.
> Also I was thinking that for this to work other than a simple way, 
> some form of measure is included. e.g 50% red(1,0,0) + 50% 
> yellow(1,1,0) =  100% orange(1,0.7,0)
> Is there such a tool in python?
> Thanks for any information
> Astan
>

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From jkrukoff at ltgc.com  Thu May 15 19:42:59 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 17:42:59 -0600
Subject: no inputstream?
In-Reply-To: <1210894364.3312.10.camel@jmk>
References: <mailman.1167.1210864003.12834.python-list@python.org>
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
	<f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>
	<1210893082.3312.2.camel@jmk>  <1210894364.3312.10.camel@jmk>
Message-ID: <1210894979.3312.14.camel@jmk>


On Thu, 2008-05-15 at 17:32 -0600, John Krukoff wrote:
> On Thu, 2008-05-15 at 17:11 -0600, John Krukoff wrote:
> > On Thu, 2008-05-15 at 15:35 -0700, max wrote:
> > > On May 15, 6:18 pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> > > > On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
> > > >
> > > > > you're right, my java implementation does indeed parse for Id3v2
> > > > > (sorry for the confusion).  i'm using the getrawid3v2() method of this
> > > > > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > > > > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > > > > i buffer and parse.  apologies if i misrepresented my code!
> > > >
> > > > > back to python, i wonder if i'm misusing the mutagen id3 module.  this
> > > > > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > > > > Mutagen/Tutorial) leads me to believe that something like this might
> > > > > work:
> > > >
> > > > > from mutagen.mp3 import MP3
> > > > > id3tags = MP3(urllib2.urlopen(URL))
> > > >
> > > > > but this gives me the following TypeError: "coercing to Unicode: need
> > > > > string or buffer, instance found".  does this mean i need to convert
> > > > > the "file-like object" that is returned by urlopen() into a unicode
> > > > > object?  if so, do i just decode() with 'utf-8', or is this more
> > > > > complex?  as of now, doing so gives me mostly "No such file or
> > > > > directory" errors, with a few HTTP 404s.
> > > >
> > > > [snip]
> > > > I think it's expecting the path of the MP3 but you're giving it the
> > > > contents.
> > > 
> > > cool, so how do i give it the path, if not in the form of a URL
> > > string?  maybe this is obvious...
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > 
> > It doesn't look like you can, with mutagen. So, time to find a different
> > library that supports arbitrary file objects instead of only file paths.
> > I'd suggest starting here:
> > http://pypi.python.org/pypi?%3Aaction=search&term=id3&submit=search
> > 
> > Possibly one with actual documentation, since that would also be a step
> > up from mutagen.
> > 
> 
> After a bit of time looking around, looks like nearly all the python id3
> modules expect to work with filenames, instead of file objects.
> 
> I can't vouch for it, and the documentation still looks sparse, but this
> module at least looks capable of accepting a file object:
> http://pypi.python.org/pypi/tagpy
> 
> Looks like it'd be a challenge to build if you're on windows, since it
> depends on an external library.
> 
> Alternately, you could probably create a subclass of the mutagen stuff
> that used an existing file object instead of opening a new one. No idea
> what that might break, but seems like it would be worth a try.
> 
> As last ditch option, could write the first few kb of the file out to a
> temp file and see if mutagen will load the partial file.
> 

Okay, now I'm officially spending too much time looking through this
stuff.

However, looks like the "load" method of the MP3 class is what you'd
want to override to change mutagen's file loading behavior. Probably
pass the URL as the filename, and take a cut & paste version of the
default load method from ID3FileType and change it to use urllib2 to
open it instead of a local file open.

Might work. Might not. No warranty express or implied.
-- 
John Krukoff <jkrukoff at ltgc.com>
Land Title Guarantee Company



From mrkafk at gmail.com  Sat May  3 19:27:25 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 16:27:25 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
Message-ID: <f3d28eb3-dc40-4e33-87ea-ed6844d5bdc9@m3g2000hsc.googlegroups.com>

Assuming all the values are unique:

>>> a={1:'a', 2:'b', 3:'c'}

>>> dict(zip(a.keys(), a.values()))

{1: 'a', 2: 'b', 3: 'c'}

The problem is you obviously can't assume that in most cases.

Still, zip() is very useful function.


From Lie.1296 at gmail.com  Wed May 14 02:08:40 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 23:08:40 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
Message-ID: <6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com>

On May 14, 12:51?pm, Lie <Lie.1... at gmail.com> wrote:
> And your 8 by 8 cross compiler doesn't impress me at all, they're all
> based on x86/IA-32 architecture which is quite similar, no PowerPC,
> SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> single language compiler instead of three dimensional compiler that
> GCC is (cross platform, cross target platform, cross language).


And to add, I also need to mention that Python doesn't need to be
compiled at all, its py and pyo file is architecture independent.
Unlike some languages that still need to be compiled.



From wuwei23 at gmail.com  Mon May 26 20:48:41 2008
From: wuwei23 at gmail.com (alex23)
Date: Mon, 26 May 2008 17:48:41 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <99f5d4c8-93de-4b69-a591-a5cd55c50efe@x1g2000prh.googlegroups.com>

On May 27, 6:02 am, "Russ P." <Russ.Paie... at gmail.com> wrote:
> But I also believe that some standard way should be available in the
> language to tell the client (and readers of the code) which methods
> are *intended* for internal use only. And that method should be based
> on more than a naming convention. Why? Because (1) I don't like
> leading underscores in my identifiers, and (2) I think I should be
> free to choose my identifiers independently from their properties.

Have you considered using the Bridge pattern to separate your
interface from your implementation?

    class Implementation:
        def private_method(self):
            raise NotImplementedError

    class Interface:
        def __init__(self):
            self.imp = Implementation()
        def public_method(self):
            self.imp.private_method()

No offensive _methods on the interface, and the implementation is
still open for consenting adults to tinker with.


From joe.p.cool at googlemail.com  Tue May 20 15:22:10 2008
From: joe.p.cool at googlemail.com (Joe P. Cool)
Date: Tue, 20 May 2008 12:22:10 -0700 (PDT)
Subject: What's wrong with that comment?
References: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>
Message-ID: <a4ba68a7-5995-4615-ad50-c4ebb48d774d@x19g2000prg.googlegroups.com>

Ludwig Miniatur wrote:
> For example:
> #!/usr/bin/env python
>
> from parser import suite, ast2list
> fh = file(__file__)
> s = fh.read()
> fh.close()
> ast = suite(s)
>
> while False:
>   print "hello world"
> # comment
>
> Looks like a little bug in parser; but what I don't understand is that
> I thought parser was build with the current syntax of python.

I didn't read the grammar but I assume that Python grammar requires a
comment to have the form #.*<end-of-line>.
>
> So, why can python run the script (an it can if you comment out the
> line "ast = suite(s)") but parser can't?

The interpreter probably appends a newline after the input stream as a
friendly service :)

--
Joe



From sjmachin at lexicon.net  Thu May 15 11:21:24 2008
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 15 May 2008 15:21:24 GMT
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482c54f2$1@news.mel.dft.com.au>

Johny wrote:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

I have a module -- which I'm going to get around to releasing one of 
these days :-) -- which allows to read dBase III, dBase IV and Foxpro 
files (sequentially only, not randomly) and to write dBaseIII files 
sequentially. Index files if any are ignored.

Field types supported for reading:
C character
D date
F float
I integer (32 bits)
L logical
M memo (stored in a .DBT (dBase) or .FPT (FoxPro) file)
N number
T time

Writing supports only dBaseIII with C, D, L and N fields, but could be 
extended easily enough (I've never had the need). No index files are 
written.

E-mail me if you are interested.

Cheers,
John


From bronger at physik.rwth-aachen.de  Sat May 24 02:12:42 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 24 May 2008 08:12:42 +0200
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <87lk20telh.fsf@physik.rwth-aachen.de>

Hall?chen!

cm_gui writes:

> [...]
>
> if python is such a good programming/scripting language,
> why can't they build a faster interpreter/compiler engine?
> and beat php and zend.
> to the python team, rebuild your interpreter!
>
> torontolife.com is slow.

For me, torontolife.com is exactly as fast as Wikipedia.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:45:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:45:48 -0300
Subject: Combining several files
Message-ID: <op.uajqqmuqx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 17:45:57 -0300, CRAIG DALTON <CXDALTON at sentara.com>  
escribi?:

> I'm looking to append several text files in one director and out put the  
> combined files into another director. I'm new to Python and just can't  
> get it to work. So far I've been able to create a file in the desired  
> directory but it isn't pulling any of the data in the originating  
> directory. Could please look at my code and tell me what I'm doing wrong.
>
> import os,shutil
> f=open("c:\\output\\testing1.txt","a+")
> for r,d,fi in os.walk("c:\\test"):
>     for files in fi:
>         if files.endswith(".txt"):
>             g=open(os.path.join(r+,files))
>             shutil.copyfileobj(g,f)
>             g.close()
> f.close()
>
> Any help would be great.

Except the spurious + in join(r+,files), and the usage of "files" denoting  
a single file name, the code looks OK to me. Try adding a few print  
statements, showing the files and directories it is processing.

(Note: Next time, if you want to post a NEW question, create a NEW thread  
instead of replying to any random post...)

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Thu May  1 11:14:00 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 May 2008 15:14:00 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
Message-ID: <Xns9A91A511BFF4duncanbooth@127.0.0.1>

AlFire <spamgrinder.trylater at ggmail.com> wrote:

> But I still can not believe that +=1 is not a thread safe operation.
> 
> 
> Any clue?

The statement:

    	x+=1

is equivalent to:

      x = x.__iadd__(1)

i.e. a function call followed by an assignment.

If the object is mutable then this *may* be safe so long as you never do 
any other assignment to x (the __iadd__ method will return the object being 
mutated so the assignment would in this restricted case be a noop).

Integers are immutable, so the assignment must always rebind x to a new 
object. There is no way given Python's semantics that this could be thread 
safe.

Generating hundreds of threads is, BTW, a very good way to get poor 
performance on any system. Don't do that. Create a few threads and put the 
actions for those threads into a Queue. If you want the threads to execute 
in parallel investigate using sub-processes.

The threading module already has a function to return the number of Thread 
objects currently alive.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat May 10 08:36:08 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 10 May 2008 14:36:08 +0200
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
Message-ID: <68lj5oF2sudm7U1@mid.individual.net>

Gandalf wrote:

> how can i ran script with python

It depends on your web server configuration. To get your web server
execute Python code, there are several alternatives like

* CGI
* FastCGI
* mod_python

Regards,


Bj?rn

-- 
BOFH excuse #93:

Feature not yet implemented



From wizzardx at gmail.com  Tue May  6 05:07:11 2008
From: wizzardx at gmail.com (David)
Date: Tue, 6 May 2008 11:07:11 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
Message-ID: <18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>

Hi Vlasta.

I had a look at your original mail.

I think your simpler (than XML) format is a good idea for now. At a
later stage you could change it to something like this:

<CUSTOM_TAG KC=12 KNJ=13 VCC=0...etc>text goes here, some more text</CUSTOM_TAG>
<CUSTOM_TAG KC=13 KNJ=14 VCC=1...etc>text goes here, some more text</CUSTOM_TAG>

And so on. This isn't much more verbose than your current syntax, and
it is (I think) valid XML that you can feed into other tools, etc.

As for internal representation, the sqllite table-like format seems to
suite your app well. Also, there may be a performance advantage (for
queries) since the actual searching takes place in optimized C code
(in C-friendly structures), rather than vanilla Python code (which
uses string dict lookups for a lot of things which C doesn't).

Have you benchmarked how long the sqllite version takes, as opposed to
a simple list of dicts like this?:

[{'line':123, 'KC':12, 'VCC':0, KNJ: 12, text: u'some text'},
 {'line':124, 'KC':13, 'VCC':1, KNJ: 13, text: u'some more text'},
 {'line':125, 'KC':14, 'VCC':2, KNJ: 14, text: u'some more text'},

 ... etc ....
]

(Note that I'm storing some values as ints rather than unicode)

In theory, if you enable psyco, this structure (even without dict
lookups) should be almost (or within a few orders at least) as fast as
sqlite (without db indexes).

Could you try that, and let me know how it perfoms?

As for optimization, here's a simple method which might help. I'm
basically simulating db indexes on all the fields:

1) Use the simple structure, as above (a list of dicts)

2) Add a dict for each field, which gives you a list of indexes into
the above structure, for each unique value

example (simplified) structure:

lookups = {
  'line': {123: [0,1,2], 124: [3,4,5].... etc}
  'KC': {12: [0,4,6], 13: [7,8,9]...etc}
  'VC': {14: [0,3,4], 15: [10,11,12] ... etc}
   ... etc
}


3) When the user searches on various criteria, look up all the
matches, and get intersections (using the 'set' module).

eg:

user searches for line 123, VC 15:

Your code:

a) Looks up line 13 indexes (0,1,2), and adds them to a set object
b) Looks up VC 15 indexes (10,11,12), and adds them to another set object
c) Gets the intersection of those sets (see python docs) (in this case
no results, but you get the idea)
d) Gives those results to the user

In theory this should perform well.

Could you try this and let me know how well it works?

David


From http  Thu May 15 04:15:09 2008
From: http (Paul Rubin)
Date: 15 May 2008 01:15:09 -0700
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <7x3aokhtki.fsf@ruckus.brouhaha.com>

urikaluzhny <ukaluzhny at nds.com> writes:
> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is there?

itertools.takewhile(condition, seq)


From inhahe at gmail.com  Wed May 21 03:09:38 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 21 May 2008 03:09:38 -0400
Subject: Running programs under a python program...
References: <43c19b29-878a-41b8-b2c9-48b5d91233c3@t12g2000prg.googlegroups.com>
Message-ID: <mUPYj.13098$Xv3.6932@bignews4.bellsouth.net>

maybe you could instead of killing the program  stop the loop that starts 
new processes and start one that runs until the last process ends?

also, if you killed the program but stdout was still set to fd and stderr 
was still set to subprocesses.STDOUT, what would happen when those two 
objects disappeared?  wouldn't the processes crash or something?

i dunno much about this though, maybe there's some way

<samslists at gmail.com> wrote in message 
news:43c19b29-878a-41b8-b2c9-48b5d91233c3 at t12g2000prg.googlegroups.com...
> So I have a python program that runs a bunch of other programs....it
> then loops forever, occasionally executing other programs.
>
> To run each of these programs my python code executes:
> subprocess.Popen(command_line, shell=True, stdout=fd,
> stderr=subprocess.STDOUT)
>
> where command_line is an appropriate command line.  :)
>
> Now my problem is when I abort this program it kills off all the child
> processes I've started. In this case I don't want that.   How can I
> stop the child processes from dieing when I kill off the parent?
>
> Thanks! 




From waldemar.osuch at gmail.com  Wed May 14 12:59:35 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Wed, 14 May 2008 09:59:35 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
References: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>
Message-ID: <c36592e2-8a07-4445-9d71-bfffd6d807fd@27g2000hsf.googlegroups.com>

On May 13, 1:02 pm, Jennifer Duerr <jenn.du... at gmail.com> wrote:
> All,
>
> I need help concerning SOAP, Python and XML. I am very new to this, so
> dumbing it down for me will not offend me!
>
> I'm using Python and want to send a user-inputted string to an
> existing Java web app that
> will output results to XML. I need to capture elements of the XML and
> put
> the info into a table. (say I send a single/simple address string to
> this
> webservice/geocode, which then returns numerous possible matches with
> XY
> values and score values, and I want to capture that into a table)
>
> How do I go about doing this? I'm told I need to use SOAP. I
> discovered that
> the best module to use is ZSI (please correct me if I'm wrong). I have
> installed the necessary module. Examples I have seen are plenty and
> all so different, its not clear to me how to go about.  I have been
> spinning my wheels for too long on this!
>
> Can someone provide some example code similar to what I need to do? Or
> any
> guidance would be appreciated.
>
> Thanks!

It looks like you have three tasks here:
 - get data
 - parse it
 - store it

SOAP could be the means to accomplish only the first one.

If the service you use exposes the functionality using XML-RPC or some
REST-ful methods I would try them first.  If it does not, then
you are stuck with SOAP. Using SOAP in Python is currently
not as straightforward as it could be.

You have chosen to use ZSI and that is fine choice.
In documentation look for "wsdl2py".
Given a URL to a WSDL file it will generate stub class definition
with methods corresponding to the SOAP service methods.
In your code you would instantiate the class, call the method you want
and grab the payload.  Your first task is done.

>From what I understand the payload will be XML that will need to be
parsed.  For that you could use the excellent ElementTree

If I were you I would investigate suds (https://fedorahosted.org/suds)
It promises to be easier to use than ZSI.  The README has the usage
example.


Waldemar


From upton at virginia.edu  Thu May 22 13:24:12 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 13:24:12 -0400
Subject: Python is slow
In-Reply-To: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <5504f9ac0805221024r5d5095v26cd33c2aa950d37@mail.gmail.com>

On Thu, May 22, 2008 at 12:14 PM, cm_gui <cmgui2 at gmail.com> wrote:
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Really fast, or fast enough?  Because "fast enough" is all that really
matters.  I don't notice any difference in HTML load time between your
various examples, what's slower is downloading all of the thumbnails
or doing AJAX calls.


From gagsl-py2 at yahoo.com.ar  Mon May 12 00:10:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 01:10:35 -0300
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
Message-ID: <op.ua0wjxqnx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 11 May 2008 13:16:25 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> the only issue i have now is that it takes a long time for 100 threads
> to initialize that connection (>5 minutes) - and as i'm doing this on
> a webserver any time i update the code i have to restart all those
> threads, which i'm doing right now in a for loop.  is there any way I
> can keep the thread stuff separate from the rest of the code for this
> file, yet allow access?

Like using a separate thread to create the other 100?

-- 
Gabriel Genellina



From kyosohma at gmail.com  Fri May  9 10:05:37 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:05:37 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com> 
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com> 
	<mailman.867.1210341764.12834.python-list@python.org>
Message-ID: <0bb46bdf-28bd-423a-91ef-83d31dcb4c57@l42g2000hsc.googlegroups.com>

On May 9, 9:02?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Fri, 09 May 2008 10:40:38 -0300, Clive_S <clives... at yahoo.co.uk> escribi?:
>
> > I downloaded (from Python) and installed python-2.4.4.msi
>
> > I have python and pythonw.exe in the Python 24 folder (but not in my
> > start menu).
> > When I click on the pythonw.exe it is not launched??
>
> pythonw.exe is NOT PythonWin - it's a consoleless version of the standard Python interpreter.
> PythonWin is part of the pywin32 package that you can download fromhttps://sourceforge.net/projects/pywin32/(make sure you get the right version)
>
> --
> Gabriel Genellina

Ah. That's where I got it. Sorry for promulgating my own confusion!

Mike


From Russ.Paielli at gmail.com  Mon May 26 16:02:21 2008
From: Russ.Paielli at gmail.com (Russ P.)
Date: Mon, 26 May 2008 13:02:21 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
Message-ID: <039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>

On May 26, 9:08 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <p... at boddie.org.uk> escribi?:
>
> >> I am also bothered a bit by the seeming inconsistency of the rules for
> >> the single underscore. When used at file scope, they make the variable
> >> or function invisible outside the module, but when used at class
> >> scope, the "underscored" variables or functions are still fully
> >> visible. For those who claim that the client should be left to decide
> >> what to use, why is the client prohibited from using underscored
> >> variables at file scope?
>
> > I don't remember why this is. I'll leave you to track down the
> > rationale for this particular behaviour. ;-)
>
> There is no rationale because this is not how it works...
> You can:
> - import a module and access *all* of their names, even names prefixed with an underscore
> - import any name from a module, even if it starts with an underscore
> - import * from a module, and it will import all names listed in __all__, even if they start with an underscore
>
> Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.
>
> --
> Gabriel Genellina


Well, that's interesting, but it's not particularly relevant to the
original point. By default, underscored variables at file scope are
not made visible by importing the module in which they appear. But
underscored member variables of a class *are* made visible to the
client by default. That's seems at least slightly inconsistent to me.

The issue here, for me at least, is not whether the data or methods
should be absolutely hidden from the client. I'm perfectly willing to
say that the client should have a back door -- or even a side door --
to get access to "private" data or methods.

But I also believe that some standard way should be available in the
language to tell the client (and readers of the code) which methods
are *intended* for internal use only. And that method should be based
on more than a naming convention. Why? Because (1) I don't like
leading underscores in my identifiers, and (2) I think I should be
free to choose my identifiers independently from their properties.

Is this a major issue? No. Is it a significant issue. Yes, I think so.

Here's another suggestion. Why not use "priv" as shorthand for
"private"? Then,

priv height = 24

at file scope would make "height" invisible outside the module by
default. And the same line in a class definition would give "height"
the equivalent of "protected" status in C++.

I think "height" looks cleaner than "_height". And isn't clean code a
fundamental aspect of Python?


From miller.paul.w at gmail.com  Wed May 14 01:21:12 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 22:21:12 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<e6c623cf-73b7-4ebc-bd68-43f778fac53d@b64g2000hsa.googlegroups.com>
Message-ID: <c6f66b55-5229-4f92-9e54-124d243f530c@z72g2000hsb.googlegroups.com>

On May 12, 3:55 am, bock... at virgilio.it wrote:

> As a test, I would leave out the last sentence, and see how many
> people (and how fast) figure out than a number can be multiple of
> three _and_ five and that the requirement is somehow incomplete ...

Actually, if you leave off the last sentence, what the program should
do when it encounters a multiple of 15 is print "Fizz" and print
"Buzz", in some order, because all multiples of 15 are multiples of 3
and 5.  The only difference is, if you don't specify to print
"FizzBuzz" for a multiple of 15, it's perfectly legal to print
"BuzzFizz". :-)

On the other hand, asking for clarification regarding multiples of 15
at least shows the applicant is thinking.



From python at bdurham.com  Wed May  7 14:32:01 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 14:32:01 -0400
Subject: Generate labels for a multi-level outline (THANK-YOU!)
In-Reply-To: <d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
Message-ID: <1210185121.25063.1251940567@webmail.messagingengine.com>

Castironpi and Dennis,

WOW! Thank you very much for your examples!!!

I wasn't trolling for free development, just whether such a library
existed and/or design ideas (basic object or generator).

I had started to develop my own solution which was much more complicated
(re: ugly) than your 2 very elegant approaches.

Its interesting to compare your two very different approaches. I will to
spend some more time studying your techniques before I choose a final
approach.

Thank you both again. I'm learning a lot of Python by studying your
examples! :)

Malcolm


From wuwei23 at gmail.com  Fri May 23 22:10:23 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 19:10:23 -0700 (PDT)
Subject: function returns , but variable values has not changed in the 
	interactive prompt
References: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>
Message-ID: <10c82981-6914-459f-bbf6-5152d94c793b@w1g2000prd.googlegroups.com>

On May 24, 5:04 am, davidj411 <davidj... at gmail.com> wrote:
> if you run execfile function to run a python script and that script
> has variables and functions, should't those variable change in the
> interactive prompt too?

Yes.

>cat a.py
a = 7
b = 'seven'

Python 2.5.1 (r251:54863, May  1 2007, 17:47:05) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> execfile('a.py')
>>> a
7
>>> b
'seven'

I think you need to show us the actual code in question, rather than
the odd behaviour you're experiencing. It's generally easier to debug
real code over blackboxing behaviour.


From yves at zioup.com  Thu May  1 21:36:34 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 02 May 2008 01:36:34 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
Message-ID: <CeuSj.107251$rd2.30692@pd7urf3no>

On UNIX, some people use
#!/usr/bin/env python

While other use
#!/usr/bin/python

Why is one preferred over the other one ?

Thanks.

-- 
Yves.
http://www.SollerS.ca


From dave_140390 at hotmail.com  Wed May 28 06:02:51 2008
From: dave_140390 at hotmail.com (dave_140390 at hotmail.com)
Date: Wed, 28 May 2008 03:02:51 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
	<m2od6q4wl3.fsf@googlemail.com>
Message-ID: <1a781c74-f71c-4252-ad84-5d853de397ee@k30g2000hse.googlegroups.com>

> Shouldn't you do data = data.decode('utf8') ?

Yes, that's it! Thanks.

-- dave


From tjreedy at udel.edu  Mon May 12 18:11:48 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 18:11:48 -0400
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <g0afb2$cdi$1@ger.gmane.org>


"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:op.ua04evz4x6zn5v at a98gizw.cpe.telecentro.net.ar...
En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> 
escribi?:

| (We used this question last year - some people gave a sensible answer
| in less | than 5 minutes, but others did not even know how to start)

Another approach  I do not remember seeing here (under 10 minutes)

fb = ('FizzBuzz', None, None, 'Fizz', None, 'Buzz', 'Fizz',
      None, None, 'Fizz', 'Buzz', None, 'Fizz', None, None)
for i in range(1,101): print(fb[i%15] or i) #3.0





From stefan_ml at behnel.de  Fri May 16 05:49:22 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 16 May 2008 11:49:22 +0200
Subject: Using file objects with elementtree
In-Reply-To: <67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
	<69184aF2tsmnaU1@mid.uni-berlin.de>
	<dc982771-5592-49c4-b473-c7fc0e407bd2@m36g2000hse.googlegroups.com>
	<482C7D93.2080809@behnel.de>
	<67e6826f-e90d-4f4f-bed8-7e3dd0003942@l64g2000hse.googlegroups.com>
Message-ID: <482D58A2.5080505@behnel.de>

castironpi wrote:
> [...], and making up words.  Blah?

"Blah" is not made up. Try again.

Stefan

PS: this might be getting slightly off-topic...


From bruno.42.desthuilliers at websiteburo.invalid  Tue May  6 03:20:29 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 06 May 2008 09:20:29 +0200
Subject: How can we write a class factory that dynamically redefines the
	__init__ function etc.
In-Reply-To: <4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com>
	<mailman.628.1210050918.12834.python-list@python.org>
	<4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>
Message-ID: <482006b9$0$11058$426a74cc@news.free.fr>

s0suk3 at gmail.com a ?crit :
> On May 6, 12:14 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> (the convention is to use lowercase names for attributes: rawdata instead
>> of RawData)
>>
> 
> But at least put an underscore between the words (raw_data), or, if
> you like the OO world, make the subsequent words capitalized
> (rawData).

mixedCase convvnetion has nothing to do with OO.


From detlev at die-offenbachs.de  Mon May 19 05:50:17 2008
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Mon, 19 May 2008 11:50:17 +0200
Subject: ANN: eric 4.1.4 released
Message-ID: <g0rigp$2nl$4@online.de>

Hi,

this is to inform all of you about the immediate availability of eric
4.1.4. It includes a fix for an API change of Qt 4.4, that caused eric4
to crash. Please update immediately.

As usual, it is available via
http://www.die-offenbachs.de/eric/index.html.

What is eric?
-------------
Eric is a Python (and Ruby) IDE, that comes with all batteries included.
For more details please see the above link.

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From Lie.1296 at gmail.com  Wed May 21 14:13:40 2008
From: Lie.1296 at gmail.com (Lie)
Date: Wed, 21 May 2008 11:13:40 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
Message-ID: <49b6a657-ff57-4314-85e7-37914496ca12@d19g2000prm.googlegroups.com>

On May 20, 10:42?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Mon, 19 May 2008 20:34:22 -0700 (PDT)
>
> notnorweg... at yahoo.se wrote:
> > i am confused.
>
> > x=5
> > y=5
>
> > x==y -> True
> > x is y -> True
>
> > shouldnt x is y return False since they shouldnt(dont?) point to the
> > same place in memory, they just store an equal value?
>
> For some immutable values (such as numbers and strings), Python will have separate variables reference the same object, as an optimization. This doesn't affect anything, since the numbers are immutable anyway and a shared reference won't create any unexpected changes.
>
> It also works with small, but not large, strings:
>
>
>
> >>> x = 'hello'
> >>> y = 'hello'
> >>> x == y
> True
> >>> x is y
> True
> >>> a = 'this is longer'
> >>> b = 'this is longer'
> >>> a == b
> True
> >>> a is b
> False
>
> In the above example, Python has created only one string called 'hello' and both x and y reference it. However, 'this is longer' is two completely different objects.

But the rule of thumb is: Don't rely on this optimization, it's an
implementation detail.


From usenet at technicalbloke.com  Fri May 16 11:40:49 2008
From: usenet at technicalbloke.com (Roger Heathcote)
Date: Fri, 16 May 2008 16:40:49 +0100
Subject: Thread killing - I know I know!
Message-ID: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>

Hello everyone, this is my first post so hello & please be gentle!

Despite many peoples insistence that allowing for the arbitrary killing 
of threads is a cardinal sin and although I have no particular threading 
problem to crack right now I remain interest in the taboo that is thread 
killing. The real world and it's data are messy and imperfect and I can 
think of several scenarios where it could be useful to be able to bump 
off a naughty thread, especially when using/testing unstable 3rd party 
modules and other code that is an unknown quantity.

With this in mind I am experimenting with a set of threading subclasses 
that would permit timeouts and the manual killing of threads. I'm trying 
to evaluate how robust such a scheme can be made and what the 
limitations would be in practice.

So far I can seemingly murder/timeout pure python threads that are stuck 
blocking for input and stuck in infinite loops but I'm guessing there 
are many more awkward cases. What I'm looking for are examples of 
code/modules that can get stuck in dead ends or might otherwise be 
problematic to terminate.

In particular I'd be interested to see if I could kill a non-returning c 
module. Of course naturally no one wants to be publishing buggy modules 
and the like so I am having trouble finding examples of misbehaving c 
code to explore further. I figure I could learn how to write c modules 
for python but, while it's something I'd like to know someday, I'm 
guessing that will be too long to fit into the immediate future :/ 
Consequently if anyone has detailed knowledge of what is and isn't 
fundamentally possible in the world of thread culling, or if you can 
point me to some gnarly/non-returning thread code to test with I would 
be forever grateful.

Oh yes, I'm working primarily with 2.5 on XP however I have access to 
linux & OSX boxen and I'd be interested to learn about problematic 
thread code for either of those platforms as well.

Thanks for reading,

Roger Heathcote - www.technicalbloke.com


From castironpi at gmail.com  Sun May 11 17:52:30 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 11 May 2008 14:52:30 -0700 (PDT)
Subject: what does int means for python ?
References: <ebaf039b-4313-451c-8c66-c3b710295c9a@8g2000hse.googlegroups.com> 
	<4826bf47$0$14345$e4fe514c@news.xs4all.nl>
	<7548143b-3dfe-478a-8db8-00541ec2863a@27g2000hsf.googlegroups.com>
Message-ID: <a284d03b-159e-4aac-a60a-6aa3cec784fa@34g2000hsh.googlegroups.com>

On May 11, 5:05?am, alefajnie <devp... at gmail.com> wrote:
> > try arr[2][3] instead.
>
> > basically your version is trying to index an array with a tuple argument (2,3).
>
> > --irmen
>
> oh, you're right.
>
> btw, is any simple way to create multi-dimension array ?
> any built-in function ?

it is not clear that two-dim arrays are faster than hashes in all
implementations of Python, or in every general language, or if they're
the right symbol for your program.

>>> a= { }
>>> a[ 0, 1 ]= True
>>> a[ 4, 0 ]= True
>>> a[ 0, 1 ]
True

however, this one:

>>> a[ 2, 1 ]

results in a KeyError.  do you want a particular thing, or are you on
the clock?

if you want to define 'blanks', that takes time too.  is it initally
empty?


From miller.paul.w at gmail.com  Mon May 26 15:11:41 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:11:41 -0700 (PDT)
Subject: Storing objects in relational database
References: 3e9098aa-9f0d-4d33-9b08-7dc6cd1b8adc@w8g2000prd.googlegroups.com
Message-ID: <820aeaca-a899-40e6-a8b1-eb98564c912c@r66g2000hsg.googlegroups.com>

On May 24, 2:12?am, bukzor <workithar... at gmail.com> wrote:

> It's not a string it's a cStringIO.StringIO, ....

Just to reinforce this point, in general, you want to use cStringIO
when you need an object that has a "file-like" interface, but you want
to keep the results in memory.


From notnorwegian at yahoo.se  Tue May 20 16:58:06 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Tue, 20 May 2008 13:58:06 -0700 (PDT)
Subject: self.var hmm?
Message-ID: <4f28a341-8f27-4e07-8940-57ae2d09c0df@q27g2000prf.googlegroups.com>

class TaskGroup:
    def __init__(self):
        self.group = []

    def addTask(self, task):
        self.group.append(task)


is this wrong? i have a program thats too big to post but should i
just do group.append in addTask?

reason is when later doing TaskGroup.group i get None



From inhahe at gmail.com  Sun May 18 06:33:24 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 06:33:24 -0400
Subject: morning in Python
References: <409ea9f1-9774-4bf2-abac-2daf997bc97f@c65g2000hsa.googlegroups.com>
	<m9iXj.4877$Kk3.3899@bignews9.bellsouth.net>
	<143b1593-658c-4a1c-9826-72af517b3ad0@m36g2000hse.googlegroups.com>
Message-ID: <SATXj.11281$hv2.7858@bignews5.bellsouth.net>


>It is not clear that the first (cheapest best) human->computer language
>is a computer language, though if two were orthonormal >in comparison
>to life, Python's fine.  Not my first.

The utterly dry, closed, logical, definitive, hierarchical, consistent, 
determinate nature of a computer language is the only thing that will 
facilitate anything useful on something as utterly stupid (and not to 
mention logical, definite and determined) as a computer.

I mean it, computers are /really/ stupid.  They're literally
stupider than a bug.  We just like things we can control.

The requisites I have for a computer language are:

Efficiency (speed)
Elegance of syntax
Powerful (conceptual-wise) abstractions

Python has delicious abstractions that make doing a lot of things really 
easy and fun to think about.
Stackless Python adds even more to that with continuations.
Also Python's dynamic (another aspect of being powerful conceptual-wise)
But most of all, I love its syntax.  Guido is the awesome.
(BTW, I won't even use any language that uses := for assignment.  I just 
refuse.  I don't care what the language has.)

The speed/efficiency issue depends on the task at hand.  For most things I 
use Python.  But assembly isn't out of the question, and it's fun to code 
in.  I also find C/C++ an elegant language.  Most things just don't need 
that speed.   And Python is 50 times easier to code in than C/C++ and 1000 
times easier to debug in.

I also like C#.

My ideal language would be a natively compiling cross between C++ and 
Python.  Objects declared with a type would be statically typed, objects not 
declared with a type would be dynamically typed.  There would also be 
keywords to declare that class names won't be reassigned and class 
attributes won't be deleted.  Those attributes would be referred to by 
offset, not hast table keys.  f







From ivan.illarionov at gmail.com  Tue May 20 04:13:44 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Tue, 20 May 2008 08:13:44 +0000 (UTC)
Subject: addendum Re: working with images (PIL ?)
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org>
Message-ID: <g0u17n$1fec$1@news.mtu.ru>

On Mon, 19 May 2008 10:18:00 -0400, Poppy wrote:

> Thanks, since posting I  figured out how to interpret the histogram
> results, which seems to be the consensus in responses. I wrote a check
> image program and have been periodically calling it against a folder
> where I make a copy of our images used for production. My method right
> now is to check what we send for errors, but is not preventive.
> 
> Also I determined whitespace is not the only issue, any color that
> dominates. I'm considering rewriting this code below to setup bins, so
> if combined neighboring colors exceeds the threshold then reject the
> image. I have examples where half the image appears black, but actually
> varies throughout.
> 
> Since my image is RGB I'm looping through a 768 element list.

I suggest:
1. convert to greyscale
2. posterize
3. check the max(im.histogram())

-- Ivan


From torriem at gmail.com  Fri May  2 14:20:22 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 02 May 2008 12:20:22 -0600
Subject: Finally had to plonk google gorups.
In-Reply-To: <e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>	<87abjne42n.fsf@physik.rwth-aachen.de>	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>
	<87r6cncp4r.fsf@physik.rwth-aachen.de>	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
Message-ID: <481B5B66.9060904@gmail.com>

Mensanator wrote:
> On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>> Shawn Milochik wrote:
>>> How does one "plonk" stuff from Google Groups? Specifically, how
>>> can this be done in Gmail?
>> Set up a filter that looks for some phrase in the mail headers that
>> identifies messages originating from google groups.  Gmail's filters are
>> fairly flexible.  I'd probably just have it look for certain words.
>> Look at an e-mail's source (raw view) and particularly check in the
>> headers for things to filter by.
> 
> Why don't you just block all messages from Gmail?

Brilliant!  Seeing as he's asking about doing the filtering in Gmail
(implying it's use for his own posting and viewing the list) that would
work splendidly for him!  Or not.

Of course you're not likely to see this message either since I and many
folks on here post from gmail.

Spam comes mainly from Google Groups, not as much from Gmail in my
experience.


From dickinsm at gmail.com  Sun May 11 23:26:09 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 11 May 2008 20:26:09 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org><pecora-DFE713.11234209052008@ra.nrl.navy.mil><mailman.882.1210361735.12834.python-list@python.org><f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
Message-ID: <6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>

On May 11, 9:36?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> Do you have in mind any situations in which it is advantageous to have 0**0
> undefined?

(Playing devil's advocate here.) If you regard x**y as exp(y*log(x))
then it's not at all clear that 0.**0. should be considered
well-defined. And since Python likes integer and floating-point
operations to match numerically (as far as possible), 0**0 then
also comes into question.

The big problem here is that the power operation is really trying
to combine two subtly different functionalities (integer powers
and real powers), with quite distinct use-cases, into a single
function.  Which leads to problems:  witness the mess that's
C99's pow specification:  why does it make sense for (-2.0)**2.0 to
return 4.0, while (-2.0)**1.999999999 returns NaN?  And why
should (-2.0)**infinity be well-defined?

It looks like that same mess is going to make it into IEEE 754r.
There were suggestions on the 754r mailing list to separate
the pow functionality out into two separate functions: pown
for integer powers and powr for real powers.  pown(0.0, 0) would
be 1, while powr(x, y) would be defined strictly as exp(y*log(x))
and so powr(0.,0.) would raise the invalid signal.

I have to admit that almost all my uses of ** are with
integer exponents, and I'd be very upset if anyone took
0**0 == 1 away...

Incidentally, the decimal module is slightly schizophrenic about
this:  Decimal(0)**Decimal(0) raises an exception, but
Decimal('Inf')**Decimal(0) returns Decimal(1).  Which doesn't
make a lot of sense, since every reason for making 0**0
undefined seems to apply equally well to infinity**0...

Mark



From castironpi at gmail.com  Tue May 13 07:27:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:27:17 -0700 (PDT)
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
	<g0bs1f$8o7$1@info.science.uva.nl>
Message-ID: <cc664c36-c80e-45af-b7be-9c0a4f3242dc@b1g2000hsg.googlegroups.com>

On May 13, 5:54?am, Paul Melis <p... at science.uva.nl> wrote:
> wxPytho... at gmail.com wrote:
> > Why is the ?\ ?backslash character frowned upon? Can I still use it in
> > Python 3.0 to achieve the same thing it was designed to do?
>
> Yes, it's still valid to use in a script.
>
> Seehttp://docs.python.org/dev/3.0/whatsnew/3.0.htmlfor the big changes
> coming with 3.0
>
> Paul

I have just discovered the escape key.  Do you honor it?


From afriere at yahoo.co.uk  Wed May  7 02:55:17 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 6 May 2008 23:55:17 -0700 (PDT)
Subject: Python MIDI in 2008
References: <1076a133-4376-4b96-a06b-4bb990ec3f42@f63g2000hsf.googlegroups.com>
	<mailman.642.1210067048.12834.python-list@python.org>
Message-ID: <620a2a56-040d-4edb-839b-ec7d9825a439@x19g2000prg.googlegroups.com>

On May 6, 7:43 pm, Max M <m... at mxm.dk> wrote:

> This is old in the sense that it has been a while since I wrote it. But
> it is virtually bug free, so nothing much is happening.
>
> The midi standard does not change so there is no real reason to
> change/upgrade it.

Maybe you should add a method somehwere that does nothing much,
increment the version number and give it a 2008 date? ;)


From kamhung.soh at gmail.com  Wed May  7 21:25:53 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 08 May 2008 11:25:53 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com>
Message-ID: <op.uas99gjvev04yd@melwxp23>

On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> Hi All,
>
> I wrote a program that takes a string sequence and finds all the words  
> inside a text file (one word per line) and prints them:
>
> def anagfind(letters): 	#find anagrams of these letters
> 	fin = open('text.txt')	#one word per line file
> 	wordbox = []		 #this is where the words will go
> 	for line in fin:
> 		word = line.strip()
> 		count = 0
> 		for char in letters:
> 			if char not in word:
> 				break
> 			else:
> 				count += 1
> 			if count == len(word):
> 				wordbox.append(word)
> 	return wordbox
>
> Now I'd like to modify the code to naturally find all anagrams inside a  
> wordlist.  What would be the best way to do this?  Using Hints?  Is it  
> possible to iterate over dict keys?  How can I make a dict that maps  
> from a set of letters to a list of words that are spelled from those  
> letters?  Wouldn't I need to make the set of letters a key in a dict?
>
> As always - Thanks for helping someone trying to learn...
>
> Dave
>

Suggestion: for each word, sort their characters and use them as the  
dictionary key.  If two words have the same combination of characters,  
then they are anagrams.  For example: "edam" and "made" are anagrams  
because they have the letters 'a', 'd', 'e' and 'm'.

Refer "Programming Pearls" by Jon Bentley.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From deets at nospam.web.de  Thu May 29 09:23:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 15:23:30 +0200
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
Message-ID: <6a7p3nF364tmpU1@mid.uni-berlin.de>

TYR wrote:

> I'm doing some data normalisation, which involves data from a Web site
> being extracted with BeautifulSoup, cleaned up with a regex, then
> having the current year as returned by time()'s tm_year attribute
> inserted, before the data is concatenated with string.join() and fed
> to time.strptime().
> 
> Here's some code:
> timeinput = re.split('[\s:-]', rawtime)
> print timeinput #trace statement
> print year #trace statement
> t = timeinput.insert(2, year)
> print t #trace statement
> t1 = string.join(t, '')
> timeobject = time.strptime(t1, "%d %b %Y %H %M")
> 
> year is a Unicode string; so is the data in rawtime (BeautifulSoup
> gives you Unicode, dammit). And here's the output:
> 
> [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> 2008 (OK, so the year is a year)
> None (...but what's this?)
> Traceback (most recent call last):
>   File "bothv2.py", line 71, in <module>
>     t1 = string.join(t, '')
>   File "/usr/lib/python2.5/string.py", line 316, in join
>     return sep.join(words)
> TypeError

First - don't use module string anymore. Use e.g.

''.join(t)

Second, you can only join strings. but year is an integer. So convert it to
a string first:

t = timeinput.insert(2, str(year))

Diez


From mnordhoff at mattnordhoff.com  Sat May 10 17:29:00 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sat, 10 May 2008 21:29:00 +0000
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <4826139C.8070602@mattnordhoff.com>

wxPythoner at gmail.com wrote:
> You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
> 
> [1]+  Stopped                 python

You can use Ctrl+C and Python will stop what it's doing and go back to
its main prompt.
-- 


From tjreedy at udel.edu  Wed May 14 17:57:33 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 17:57:33 -0400
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
Message-ID: <g0fn89$9vq$1@ger.gmane.org>


"Tal Einat" <tal.no.no.spam at gmail.com> wrote in message 
news:8885effd-12a6-4e35-9629-ec4028afaa2d at 2g2000hsn.googlegroups.com...
| Hi all,
|
| I just ran into this. In IDLE (Python 2.5), the call-tip for
| itertools.count is:
| "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"
|
| That's itertools.count.__init__.__doc__, while itertools.count.__doc__
| is the informative doc-string ("DS" henceforth):
| """count([firstval]) --> count object
|
| Return a count object whose .next() method returns consecutive
| integers starting from zero or, if specified, from firstval."""
|
|
| That seems very counter-intuitive to me - I would expect the DS for
| __init__ to explain how to use the constructor.
|
| IDLE's call-tip module obviously thinks so as it prefers the __init__
| DS to the class's DS. IPython does the opposite as far as I can tell,
| when I enter 'itertools.count?' it shows the class's DS, but shows
| nothing for a custom class whose __init__ has a DS while the class
| itself does not.
|
| I'm wondering what a call-tip mechanism should do when a class and its
| __init__ both have a DS. I'd be willing to work up a patch for IDLE's
| call-tip module to work better in this regard, or for itertools and
| similar classes in the stdlib, if needed.

Perhap IDLE should be changed, but I am not sure.  After more discussion 
here, if any, this would be worth a tracker item. 





From pecora at anvil.nrl.navy.mil  Mon May 19 15:09:59 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 19 May 2008 15:09:59 -0400
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <pecora-E07827.15095919052008@ra.nrl.navy.mil>

In article <hifYj.43082$4B6.9014 at newsfe14.ams2>,
 Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:

> Bruno Desthuilliers schreef:
> > 1/ being interpreted or compiled (for whatever definition of these 
> > terms) is not a property of a language, but a property of an 
> > implementation of a language.
> > 
> > 2/ actually, all known Python implementations compile to byte-code.
> > 
> 
> You keep saying that, and in theory you're right. But I'm still inclined 
> to disagree with it, since the practical reality is different. Python is 
> indeed compiled to byte code, but if you compare that byte code with 
> assembly code you'll see that there's a whole world of difference 
> between the two, largely because of the dynamical nature of Python. Fact 
> is that Python was designed from the start to run on a virtual machine, 
> not on the native hardware.
> 
> C OTOH was designed to be compiled to assembly code (or directly to 
> machine code) and as a result there are no (or virtually) no 
> implementations that interpret C or compile it to bytecode.


But how about this C/C++ interpreter.  Dr. Dobbs article:  
http://www.ddj.com/cpp/184402054.  Title and first two paragraphs:

Ch: A C/C++ Interpreter for Script Computing
Interactive computing in C 

Ch is a complete C interpreter that supports all language features and 
standard libraries of the ISO C90 Standard, but extends C with many 
high-level features such as string type and computational arrays as 
first-class objects.

For some tasks, C and its compile/ link/execute/debug process are not 
productive. As computer hardware becomes cheaper and faster, to be 
productive and cost effective, script computing in C/C++ can be an 
appealing solution. To this end, we have developed Ch, an embeddable 
C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D 
plotting, numerical computing, and embedded scripting [1].

-- 
-- Lou Pecora


From mauriceling at gmail.com  Tue May 27 19:31:17 2008
From: mauriceling at gmail.com (mauriceling@acm.org)
Date: Tue, 27 May 2008 16:31:17 -0700 (PDT)
Subject: [ANN] The Python Papers is moving to use Open Journal System
Message-ID: <932eed21-9450-46e0-94c3-c67dda16be66@b5g2000pri.googlegroups.com>

Some of our readers may be wondering about the reason why we had not
put up a call for interest for our next issue, Volume 3 Issue 2. The
Python Papers will always welcome interests and submissions with or
without a public call; just let us know by emails.

The Python Papers is nearing the end of its 2nd year and our continued
challenge is to expand its outreach, especially into index databases,
online repositories and libraries. After a few months of search, we
had decided to use Open Journal System (OJS) from the Public Knowledge
Project (http://pkp.sfu.ca/?q=ojs) to manage The Python Papers. We are
currently in the process of setting the system up in our web server
and is feverishly porting all back issues into it. Hence, we are
delaying our call for interest/submissions for June 2008. Instead, our
next issue will be set in August 2008 - a call for interest and
publishing timeline will be released soon.

We welcome any offer of assistance.

We hope that by using OJS, The Python Papers will conform to Open
Archive Initiative (OAI) which is a standard for metadata harvesting
of publications. We further hope that OAI will pave the way into
academic libraries and repositories.

The OJS site for The Python Papers is http://ojs.pythonpapers.org

We thank all authors and readers, and the computing/programming
community at large for your continued support.

Sit tight for your next issue in August.

Warm regards
Maurice Ling
Co-Editor-in-Chief, The Python Papers



From teroV at nowhere.invalid  Sun May 25 06:17:46 2008
From: teroV at nowhere.invalid (TeroV)
Date: Sun, 25 May 2008 13:17:46 +0300
Subject: access interactive namespace from module (shared namespace?)
In-Reply-To: <mailman.1564.1211709217.12834.python-list@python.org>
References: <mailman.1564.1211709217.12834.python-list@python.org>
Message-ID: <f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>

Ulrich Dorda wrote:
> I've got a probably embarrassing trivial problem with namespaces, but 
> couldn't solve it myself nor find an answer in the net. Hopefully one of 
> you guys can help me.
> 
> What I want to do:
> Use the interactive shell and e.g define the variable a there.
> Then load a module and access a from within.
> 
> e.g file "utest.py"
> 
> def doit():
>     print 2*a
> 
> in the shell:
> 
> import utest
> a=3
> utest.doit()  <- I want this to print 2*a, but of course obtain: <type 
> exceptions.NameError'>: global name 'a' is not defined
> 
> Any change I do to a in the shell should be seen from the doit() 
> function, any variable assignment I do in the doit() function should be 
> seen in the shell. I guess it's somehow a namespace sharing.
> 
> Actually the function doit() will contain an eval() function that should 
> evaluate a (via a gui) dynamically inserted expression.
> 
> Any one got a clue? (a clue what I try to say and how to help?!)
> 
> Thanks a lot in advance!!
> 
> Ulrich
> 
> 

Here is one way

#utest.py:
def doit(valuemap):
     print 2*valuemap['a']

Python 2.5.1 (r251:54863, Mar  7 2008, 04:10:12)
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> a = 4
 >>> import utest
 >>> utest.doit(locals())
8
 >>>


From dgetsman at amirehab.net  Wed May 21 17:19:56 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 14:19:56 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <bb0a0f81-613e-4afe-8cbb-e48a03141c42@y21g2000hsf.googlegroups.com>

In my opinion, with the previous experience that you have in coding
that you've mentioned, you're probably better off if you minimize the
amount of new syntaxes you'll have to pick up.  Standard technique for
what you're trying to accomplish is more often than not Apache with
the PHP and MySQL support built in.  PHP has great support for
accessing a MySQL database, which is where the script would store and
load your entries (and/or other applicable data) from.  Then again,
you are really learning HTML, PHP, and MySQL at the same time, which
can be a pain in the ass.  There are some excellent books by O'Reilly
and Associates on just that subject, though.  They combine the PHP &
MySQL into one book that'll get you started and able to handle that
kind of task really quick.  The HTML syntax is going to be separate,
wherever you go.  It'll be simple if you want it dumping text to the
screen, and a pain in the ass if you want pretty formatting with
designs and text that lays out just in a certain area.

My suggestion, if you want to keep that gray meat sparking, is to go
with only html & php.  You could have the php dumping your entries
into date/time named textfiles on there when you're writing, and when
someone is reading, it just orders them sequentially by the date &
time in their filenames.

Then again, you learn the HTML+PHP+MySQL thing and you've got a skill
that you can market on Craigslist to a bunch of people for $20/hr
+.  :)

<a href="http://unix.derkeiler.com/Newsgroups/comp.sys.sun.apps/
2008-04/msg00000.html">
-Damon A. Getsman
Linux/Solaris Systems Administrator
</a>


From monica.leko at gmail.com  Sun May 18 07:13:01 2008
From: monica.leko at gmail.com (Monica Leko)
Date: Sun, 18 May 2008 04:13:01 -0700 (PDT)
Subject: Write bits in file
Message-ID: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>

Hi

I have a specific format and I need binary representation.  Does
Python have some built-in function which will, for instance, represent
number 15 in exactly 10 bits?


From inhahe at gmail.com  Thu May 22 12:13:16 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:13:16 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com>
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>
	<a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>
	<111a4113-d453-4c2c-9997-0c27d8fcea8b@a32g2000prf.googlegroups.com>
Message-ID: <HXgZj.61417$3v1.4621@bignews3.bellsouth.net>

>Ma: Symbolic identity is a mathematical relation
>Mb: Symbols are acausal
>m: Matter is causal
>C: Symbolic identity is not defined on matter.

What is defined on matter then?  You're saying all symbolism is not defined 
on matter.  Much of our thinking about the world itself is symbolic.  How do 
we 'define on matter' without thinking about it?  Definition is another 
symbolic thinking thing we do.  What does it mean to 'define on matter'?  If 
you were to paint symbol/matter like the mind/body problem interpreted on 
dualism (not to beg the question, but just to say if you're saying they're 
different substances) then some people would ask, how does one thing 
interact with the other?  You could say that symbols don't exist and 
inferring symbols is just a way of thinking of the world, but since we think 
in symbols, thinking becomes something that doesn't exist and is inferred 
from a way of thinking about the world, which doesn't exist and is inferred 
from a way of thinking about the world, etc.  I don't think you can say that 
thought-symbolism is a different question from mathematical symbolism 
because Aristotle inferred "a is a" directly from the way we think about the 
world.  cf:
>>>a is a
True

Perhaps symbols and symbolic identity are defined as algorithms which happen 
in the real world to come to a conclusion.  It raises the question of how 
causal an algorithm is.  But if you call an algorithm 'a way of doing 
something' then it's much more down-to-Earth.   But it raises the question 
of how we define the boundaries of whether doing something is 'doing that 
thing' (since an algorithm is strictly formal and mathematically 
deterministic), given that you never step in the same river twice, since you 
then have to define the boundaries of determining whether doing something 
falls within the boundaries or not, ad infinitum.

I don't have a conclusion.  Suffice it to say it obviously works out 
somehow.  I'm just wondering about what 'defined on matter' means.








From dmkim at mktec.co.kr  Sun May 25 22:30:44 2008
From: dmkim at mktec.co.kr (bbmerong)
Date: Sun, 25 May 2008 19:30:44 -0700 (PDT)
Subject: PYQT- How to prevent a dialog being resized in qtdesigner
Message-ID: <7530dbde-9fbb-4527-9f46-dbd8ecf060af@l28g2000prd.googlegroups.com>

I have a question about qtdesigner.

I'd like to know how to prevent a dialog being resized in qtdesigner.

I'll wait for your answer.

Then, Thank you in advance.


From andrej.panjkov at climatechange.qld.gov.au  Tue May  6 19:25:20 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Tue, 6 May 2008 16:25:20 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org> 
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com> 
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
Message-ID: <1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>

On May 6, 9:06 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com> writes:
> > 2008/5/6, Banibrata Dutta <banibrata.du... at gmail.com>:
> > >  > Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>
> > >  So why not put symlink to Python over there on all machines, if
> > >  we can put one (or env itself) there ?
>
> > To avoid linking all the rest of interpreters like perl, ruby, lua
> > and dozens of others.
>
> The argument was being made from "thousands of scripts". Isn't "dozens
> of symlinks" better?
>

It depends on single user vs multi user.  We keep multiple versions of
packages because some software requires the older versions.  Which
version do we symlink to?  What if we simultaneously require access to
two different versions?  For example, to keep legacy software going,
or to test updated versions while keeping operational versions
running.
What if we have shared file systems, and we have multiplatform
versions?  Python for solaris, python for tru64?

In a sense, we do have dozens of "virtual" links, using the modules
package to adjust paths on the fly.  This is more flexible than having
a static symlink in /usr/bin.  It allows us to select on a per user,
per process, per script basis, the python we want, version, platform
etc.  With a static symlink, every user/process/job gets the same
python, unless you want to flip symlinks around.

Also, every 10 years or so, each platform gets replaced, so we are
replacing platforms here every few years.  And we don't always get the
same replacement system.  Sure we can go in and  touch up all the
scripts.  But it just seems so much easier and flexible to tell a
python/bash/other script to use what you get from the path, and set
the paths.

Of course, things are different on a single user desktop system, with
its own filesystems.  If you are sure where python is, and you only
have one python, and you don't mind revisiting your scripts and
editing them if things change, by all means hard code the python path
in.

A


From basti.wiesner at gmx.net  Fri May 30 10:42:00 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Fri, 30 May 2008 16:42:00 +0200
Subject: UNIX credential passing
References: <mailman.1755.1212099902.12834.python-list@python.org>
Message-ID: <g1p3np$pvf$01$1@news.t-online.com>

[ Kris Kennaway <kris at FreeBSD.org> ]

> I want to make use of UNIX credential passing on a local domain socket
> to verify the identity of a user connecting to a privileged service.
> However it looks like the socket module doesn't implement
> sendmsg/recvmsg wrappers, and I can't find another module that does this
> either.  Is there something I have missed?

http://pyside.blogspot.com/2007/07/unix-socket-credentials-with-python.html

Illustrates, how to use socket credentials without sendmsg/recvmsg and so
without any need for patching.


-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From vivainio at gmail.com  Wed May 14 05:59:44 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 14 May 2008 09:59:44 GMT
Subject: portable way to tell what Popen will call
References: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>
Message-ID: <873aoltdda.fsf@gmail.com>

Brendan Miller <catphive at catphive.net> writes:

> For instance on unix systems, Popen will work for files flagged with
> the executable bit, whereas on windows Popen will work on files
> ending the in .exe extension (and I don't think anything else). Is
> there a portable way

Actually, if you pass the use_shell = 1 argument to Popen, it will
launch the process using a shell - that is, what you expect to work in
a shell (and consequently os.system()) will work.

> to check what Popen will work on without actually execute it? Do I
> have to write a bunch of platform specific code here?

Unfortunately, you'll probably need to write platform specific kludges
for this.


From george.sakkis at gmail.com  Thu May 15 08:02:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 15 May 2008 05:02:46 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
References: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>
	<g0gndb$3vt$03$1@news.t-online.com>
Message-ID: <07e21cac-a82d-44eb-a033-d606b251d0fd@c58g2000hsc.googlegroups.com>

On May 15, 3:06 am, Peter Otten <__pete... at web.de> wrote:

> George Sakkis wrote:
> > I spent several hours debugging some bogus data results that turned
> > out to be caused by the fact that heapq.nlargest doesn't respect rich
> > comparisons:
>
> >     import heapq
> >     import random
>
> >     class X(object):
> >         def __init__(self, x): self.x=x
> >         def __repr__(self): return 'X(%s)' % self.x
> >         if True:
> >             # this succeeds
> >             def __cmp__(self, other): return cmp(self.x , other.x)
> >         else:
> >             # this fails
> >             def __lt__(self, other): return self.x < other.x
>
> >     s = [X(i) for i in range(10)]
> >     random.shuffle(s)
>
> >     s1 = heapq.nlargest(5, s)
> >     s2 = sorted(s, reverse=True)[:5]
> >     assert s1 == s2, (s,s1,s2)
>
> >     s1 = heapq.nsmallest(5, s)
> >     s2 = sorted(s)[:5]
> >     assert s1 == s2, (s,s1,s2)
>
> > According to the docs, nlargest is equivalent to: "sorted(iterable,
> > key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
> > be at least a documentation bug, if not an implementation one.
>
> Implementing a subset of the rich comparisons is always dangerous. According
> to my ad hoc test you need <, <=, and == for nlargest()/nsmallest() to
> work:
>
> import heapq
> import random
>
> used_rich = set()
>
> class X(object):
>     def __init__(self, x): self.x=x
>     def __repr__(self): return 'X(%s)' % self.x
>     def __lt__(self, other):
>         used_rich.add("lt")
>         return self.x < other.x
>     def __eq__(self, other):
>         used_rich.add("eq")
>         return self.x == other.x
>     def __gt__(self, other):
>         used_rich.add("gt")
>         return self.x > other.x
>     def __ge__(self, other):
>         used_rich.add("ge")
>         return self.x >= other.x
>     def __ne__(self, other):
>         used_rich.add("ne")
>         return self.x != other.x
>     def __le__(self, other):
>         used_rich.add("le")
>         return self.x <= other.x
>
> s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]
>
> smallest = sorted(s)[:5]
> largest = sorted(s, reverse=True)[:5]
>
> print "used by sorted:", used_rich
> used_rich = set()
>
> for i in range(10000):
>
>     s1 = heapq.nlargest(5, s)
>     assert s1 == largest, (s, s1, largest)
>
>     s1 = heapq.nsmallest(5, s)
>     assert s1 == smallest, (s, s1, smallest)
>
>     random.shuffle(s)
>
> print "used by nlargest/nsmallest:", used_rich
>
> Output:
> used by sorted: set(['lt'])
> used by nlargest/nsmallest: set(['lt', 'le', 'eq'])

Interesting, I don't get 'eq' on one box ("2.5 (r25:51908, Sep 19
2006, 09:52:17) [MSC v.1310 32 bit (Intel)]") but I get it on another
("2.5.1 (r251:54863, May  9 2007, 15:27:54) [GCC 3.3.5 (Debian
1:3.3.5-13)]").

A more interesting question is how many (and which) of the rich
comparisons can you omit while maintaining correctness (see script
below). The results on my v2.5 on Windows are:

1. Use ('lt', 'le') if both present
2. If only 'lt' is missing use ('le', 'gt')
3. If only 'le' is missing use ('lt', 'ge')
4. If both ('lt', 'le') are missing use  ('gt', 'ge')
5. If 3 or more of ('lt', 'le', 'gt', 'ge') are missing use the
remaining one (if any) plus 'cmp'
6. If (5) holds and there is no 'cmp', nlargest/nsmaller are WRONG

The results on the v2.5.1 debian box are the same, with the addition
of 'eq' in all steps; if 'eq' is not present, 'cmp' is called, and if
neither 'cmp' is present, the results are still correct (provided any
of the cases 1-4 above hold of course). IOW, it does some extra
equality checks if it can, but these are optional since it can be
correct without them.

For sorted(), the results are identical on both boxes:
  - Use only 'lt' if present else
  - Use only 'gt' if present else
  - Use only 'cmp' if present else
  - WRONG RESULTS
IOW, no attempt to use 'le','ge','eq','ne' is made.

I wonder how stable is this behavior across different versions and
implementations (Jython, IronPython, etc).

George


==== testing script ==================================

import heapq
from random import shuffle

used = set(); add = used.add

class X(object):
    def __init__(self, x): self.x=x
    def __repr__(self): return 'X(%s)' % self.x

    # try to remove one or more of these included in a used set
    # and see what happens
    def __gt__(self, other): add('gt'); return self.x > other.x
    def __ge__(self, other): add('ge'); return self.x >= other.x
    def __lt__(self, other): add('lt'); return self.x < other.x
    def __le__(self, other): add('le'); return self.x <= other.x
    def __eq__(self, other): add('eq'); return self.x == other.x
    def __ne__(self, other): add('ne'); return self.x != other.x
    def __cmp__(self, other): add('cmp'); return cmp(self.x, other.x)


if __name__ == '__main__':
    check_heapq = True
    n = 1000
    s = [X(8), X(0), X(3), X(4), X(5), X(2), X(1), X(6), X(7), X(9)]
    used.clear()
    if check_heapq:
        for i in xrange(n):
            s2 = heapq.nlargest(5, s)
            assert [a.x for a in s2] == range(9,4,-1), s2
            shuffle(s)
    else:
        for i in xrange(n):
            s2 = sorted(s, reverse=True)[:5]
            assert [a.x for a in s2] == range(9,4,-1), s2
            shuffle(s)
    used_largest = used.copy()
    print "largest:", used_largest

    used.clear()
    if check_heapq:
        for i in xrange(n):
            s2 = heapq.nsmallest(5, s)
            assert [a.x for a in s2] == range(5), s2
            shuffle(s)
    else:
        for i in xrange(n):
            s2 = sorted(s)[:5]
            assert [a.x for a in s2] == range(5), s2
            shuffle(s)
    used_smallest = used.copy()
    print "smallest:", used_smallest
    assert used_largest == used_smallest


From gagsl-py2 at yahoo.com.ar  Sun May 18 01:17:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 May 2008 02:17:56 -0300
Subject: r' question
References: <20080518023835.61FE61E4009@bag.python.org>
Message-ID: <op.ubb3n61qx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 17 May 2008 23:37:16 -0300, Dick Moores <rdm at rcblue.com> escribi?:

> I have a text file of phone numbers, which I'd like to search with a regex.
>
> fstr = "\sjoe\s"
> regex = "^.*" + fstr + ".*$"
>
> fstr = "\sjoe\s"
> regex = "r'^.*" + fstr + ".*$'"

The r"..." is a signal to the parser - meaning "don't interpret the escape characters here". Note that the r is OUTSIDE the quotes. In your example, the escape characters are in fstr, so it should be written as r"\sjoe\s"

Now, if you want "the lines that contain the word joe surrounded by space", just use:

import re
regex = r"\sjoe\s"
p = re.compile(regex, re.I)
f = open('phone.txt', 'r')
for line in f:
     m = p.search(line)
     if m:
         print m.group()
f.close()

A file is its own line iterator (no need for readlines). And since you're iterating over lines, the regex doesn't have to test for it ^ and $.

-- 
Gabriel Genellina



From goldnery at gmail.com  Mon May 26 18:18:00 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 15:18:00 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
	<1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>
	<g1fbti$2cld$1@news.mtu.ru>
Message-ID: <cdcf5e3f-f2ef-4fc7-86fb-ed68cd1b2772@w7g2000hsa.googlegroups.com>

On May 27, 12:00 am, Ivan Illarionov <ivan.illario... at gmail.com>
wrote:
> On Mon, 26 May 2008 14:40:18 -0700, Gandalf wrote:
> > Thanks!
> > Anyone know which library should i learn then?
>
> Looks like you need to dive into Win32 APIhttp://msdn.microsoft.com/en-us/library/ms697544(VS.85).aspxhttp://msdn.microsoft.com/en-us/library/ms645530(VS.85).aspx
> and others
> combined with ctypes.
>
> Ivan

well, that seems extremely valuable but how can i implement those
functions with python?


From loriw at novoengineering.com  Thu May  1 17:28:24 2008
From: loriw at novoengineering.com (Lori Welte)
Date: Thu, 1 May 2008 14:28:24 -0700
Subject: Is anyone using Python for embedded applications?
Message-ID: <EBBD6E66CC2C41489FC4C89E63F5A20F4A0A00@EXCHANGE.novo.local>

Hi Dean

 

I need a minimalist version of Python to run on a ColdFire-based
embedded system (written in C with no RTOS). It will be used by
mechanical engineers to test their servo and stepper motors. I need all
the basic features you are providing in PyMite.

 

I've managed to port PyMite and run a test "trivial" on my embedded
platform, but I am a bit confused about whether this is really what I
need.

 

I need an interactive Python interpreter running on my embedded...I will
be feeding it lines through my USB connection. It seems that PyMite is
not exactly what I'm looking for (?). I expected to be able to do
something like pm_run("abs(-1)") for example, but that doesn't work.
After reading carefully your docs, it seems like in fact that PyMite
should be used by writing Python programs on a PC, running your
PyImageCreator, then rebuilding the embedded with the native C code, and
downloading the image file to the embedded? Although this is pretty
nifty, this won't work for my needs.

 

Could you confirm that PyMite does not run like pm_run() =
PyRun_SimpleString() or if it does, what am I missing?

 

Thanks so much for all your excellent software

Lori Welte

"firmwaregirl"

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From Skonieczny.C at emssatcom.com  Fri May 30 05:16:45 2008
From: Skonieczny.C at emssatcom.com (Skonieczny, Chris)
Date: Fri, 30 May 2008 18:46:45 +0930
Subject: How to covert ASCII to integer in Python?
Message-ID: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com>

YOU SHOULD REMOVE or CORRECT YOUR POST here: 
http://mail.python.org/pipermail/python-list/2007-February/427841.html  
 
It is not true - eg. try : 
a='P'            # P is ASCII , isn't it ? 
b=int(a)
and what you will get ? An error !!!
 
Or probably you yourself should - quote : 
"You probably should go through the tutorial ASAP that is located here:

http://docs.python.org/tut/ "

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From stanc at al.com.au  Tue May 13 19:46:51 2008
From: stanc at al.com.au (Astan Chee)
Date: Wed, 14 May 2008 09:46:51 +1000
Subject: threads problem in python
In-Reply-To: <bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
References: <48296275.9090602@al.com.au>	<mailman.1039.1210675135.12834.python-list@python.org>
	<bf9da3a9-0137-4e70-9aa3-5e553b222649@56g2000hsm.googlegroups.com>
Message-ID: <482A286B.3090504@al.com.au>

Sorry, I mean functions not classes. Well, actually, one is a class and 
another is a function. So when the script (its a free game btw) runs, it 
instantiates the first class and somewhere in the middle of processing 
the first class, I need to call a function as a separate thread, I also 
want to wait for the function to complete and I was wondering how python 
handles the thread of this function? Does it die when the function 
completes? Anyway, I know it sounds silly to have 2 threads when I can 
do it with one, but Im using wx to render opengl objects using pygame. 
So it has to be a separate thread, otherwise wx wont play nice. Is there 
a simple example of how I can do this?
And as for finance, the source for the game is free, but it isnt free to 
play on my server. How does that sound?
Thanks
Astan

castironpi at gmail.com wrote:
> On May 13, 5:38 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>   
>> En Tue, 13 May 2008 06:42:13 -0300, Astan Chee <st... at al.com.au> escribi?:
>> I'm confused trying to understand your requirements too. "run a class?"
>> Threads execute code, it's easier to think of them as *functions* that are  
>> executed at the same time (or almost).
>> So you have a function A that runs first, and creates a second thread that  
>> will execute function B. Then A will wait for B to finish. What do you  
>> want to do in A while it's waiting? Nothing? Then why to use a second  
>> thread? Or is it a graphical interfase? GUI libraries like wxPython, Qt  
>> and others have specific ways to execute backgroung tasks while keeping  
>> the user interface responsive - you should tell us which one you're using  
>> in that case.
>>
>> --
>> Gabriel Genellina
>>     
>
> I don't mean to be impertinent, but are you making any cents with the
> assignment?  Both free-ers and workers come in here.  I am a free-er
> who has reason to doubt that money-driven programs get stuck at that
> kind of ambiguity.  I hold that money keeps you out of that mess.
>
> However, there are a number of things we can do to help, but as I, per
> se, am only one person, I may not give you the best advice to start
> with.  How do you find the 'threading.py' docs?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."



Animal Logic
http://www.animallogic.com

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From kyosohma at gmail.com  Wed May 21 09:24:48 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 21 May 2008 06:24:48 -0700 (PDT)
Subject: Print HTML from Python
References: <mailman.1413.1211359541.12834.python-list@python.org>
Message-ID: <289f28c7-ce86-4ea4-bfe8-10eac754e153@26g2000hsk.googlegroups.com>

On May 21, 3:45?am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi All,
>
> I am at a loss. This is slightly OT because it concerns Windows and
> HTML printing. I would like to print a HTML document from Python, but
> not showing the printing dialog. After numerous searches and trials I
> came to the conclusion that ShellExecute with the "print" command and
> a HTML document simply always shows a print dialog, so that road is a
> dead end (or unless someone can show me a snippet that does work).
>
> I used win32com and I am able to print through he internet explorer
> interface which seems to work, but quite unreliably. When I execute
> the scipt too fast, nothing is printed at all. The method isBusy that
> IE exposes through COM always returns False so there is no way to wait
> reliably on the progress of the printer.
>
> So basically my question is, does someone know a python lib or way to
> print HTML to the default printer (I can get the printer name so even
> that is not really needed) without showing the print dialog?
>
> With regards,
> - Jorgen


Did you try all the methods on Tim Golden's site?

http://timgolden.me.uk/python/win32_how_do_i/print.html

I use the one at the bottom for PDFs. I never see a print dialog, but
it does leave Adobe running. If you're printing from Internet
Explorer, you might look at the PAMIE project.

http://pamie.sourceforge.net/

HTH

Mike


From levlozhkin at gmail.com  Sun May  4 16:01:15 2008
From: levlozhkin at gmail.com (lev)
Date: Sun, 4 May 2008 13:01:15 -0700 (PDT)
Subject: Script Optimization
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.525.1209903717.12834.python-list@python.org>
Message-ID: <15e73598-1186-40d5-af63-f176976c5ed1@s33g2000pri.googlegroups.com>

> * Remove newlines introduced by email
> * Move imports to start of file
    used imports of the edited script you sent.
> * Change indentation from 8 spaces to 4
    I like using tabs because of the text editor I use, the script at
the end is with 4 though.
> * Move main() to bottom of script
> * Remove useless "pass" and "return" lines
    I replaced the return nothing lines with passes, but I like
keeping them in case the indentation is ever lost - makes it easy to
go back to original indentation
> * Temporarily change broken "chdir" line
    removed as many instances of chdir as possible (a few useless ones
to accomodate the functions - changed functions to not chdir as much),
that line seems to work... I made it in case the script is launched
with say: 'python somedir\someotherdir\script.py' rather than 'python
script.py', because I need it to work in it's own and parent
directory.
> * Split lines so they fit into 80 chars
> * Add spaces after commas
> * Use path.join instead of string interpolation
    in all cases when possible - done
> * rename rename() to rename_md5() because rename() shadows a function
> imported from os.
    renamed all functions to more understandable names (without
collisions)
> * Rename vars shadowing imported names
    renamed almost all vars to more understandable names
> * Improve logic for checking when to print help
    the example you gave me does pretty much the exact same thing as
before... (the options are either false or true depending on if the
argument was used, if false for both then no logic was done and help
is shown, which would be exactly the same if the did_something var
remained false.
> * Create emtpy md5 listing file if one doesn't exist
    I intended it to be a script to help ripping a specific mp3cd to
disk, not necessarily create checksum files, because i intend to
include the checksums file.
> * Add a comment for a dodgy-looking section
    The 4 folders to be renamed are intentional (this is for a
specific mp3cd with 4 album folders)

I added comments to explain what I was doing with the dictionary[x][1]
[1][0], and also what the indexes for the strings are used for ([3:]
to remove the 001 in 001Track.mp3, etc.)


Thanks for the advice so far,
lev

#!/usr/bin/env python

import md5
from glob import glob
from optparse import OptionParser
from os import chdir, path, rename, remove
from sys import argv, exit

def verify_checksum_set(checksums):
    checksums = open(checksums, 'r')
    changed_files = {}
    missing_files = []
    for fline in checksums.readlines():
        line = fline.split(' *')
        original_sum = line[0].upper()
        try:
            new_sum = calculate_checksum(line[1].strip())
            if  new_sum == original_sum:
                print '.',
                pass
            else:
                changed_files[line[1]] = (original_sum, new_sum)
                pass
        except IOError:
            missing_files.append(line[1])
            pass
        pass
    checksums.close()
    changed_files_keys = changed_files.keys()
    changed_files_keys.sort()
    missing_files.sort()
    print '\n'
    if len(changed_files) != 0:
        print 'File(s) changed:'
        for key in changed_files_keys:
            print key.strip('\n'), 'changed from:\n\t',
changed_files[key][0], \
                'to\n\t', changed_files[key][1]
            pass
        print '\n\t', len(changed_files), 'file(s) changed.\n'
        pass
    if len(missing_files) != 0:
        print 'File(s) not found:'
        for x in range(len(missing_files)):
            print '\t', missing_files[x]
            pass
        print '\n\t', len(missing_files), 'file(s) not found.\n'
        pass
    if not len(changed_files) and not len(missing_files):
        print "\n\tChecksums Verified\n"
        pass
    pass

def calculate_checksum(file_name):
    file_to_check = open(file_name, 'rb')
    chunk = 8196
    checksum = md5.new()
    while (True):
        chunkdata = file_to_check.read(chunk)
        if not chunkdata:
            break
        checksum.update(chunkdata)
        pass
    file_to_check.close()
    return checksum.hexdigest().upper()

def rename_file_set(new_dir_names, checksums):
    file_info = md5format(checksums)
    dirlist = glob('00[1-4]Volume [1-4]')
    dirlist.sort()
    for x in range(4):
        rename(dirlist[x], new_dir_names[x])
        print '\t', dirlist[x], 'renamed to:', new_dir_names[x]
        chdir(new_dir_names[x])
        for old_file_name in glob ('*.mp3'):
            # old_file_name[3:] is part of removing numbering:
'001Track ...'
            new_file_name = old_file_name[3:]
            rename(old_file_name, new_file_name)
            print '\t\t', old_file_name, 'renamed to:', new_file_name
            pass
        chdir('..')
        file_info = md5file_name_edit(file_info,dirlist[x],
            new_dir_names[x])
        pass
    md5write(file_info, checksums)
    replace_strings('The American Century.htm', dirlist,
new_dir_names)
    print '\n\tDirectories and Files renamed.'
    pass

def md5format(checksums):
    file_info = {}
    checksums = open(checksums, 'r')
    for line in checksums.readlines():
        splitline = line.split(' *')
        #original full filename = (checksum, [directory name, file
name])
        file_info[splitline[1]] = (splitline[0],splitline[1].split('\
\'))
        pass
    checksums.close()
    return file_info

def md5file_name_edit(file_info, old_dir_name, new_dir_name):
    for x in file_info.keys():
        dir_name_from_file = file_info[x][1][0]
        if dir_name_from_file == old_dir_name:
            checksum = file_info[x][0]
            file_name_from_file = file_info[x][1][1]
            #md5 format: 'C8109BF6B0EF724770A66CF4ED6251A7 *001Album
1\001Track.mp3'
            file_info[x] = (checksum, [new_dir_name,
file_name_from_file])
            #mp3cd numbering: '001Track.mp3, 002Track.mp3...'
            if file_name_from_file[0] == '0':
                file_info[x] =(checksum, [new_dir_name,
                    file_name_from_file[3:]])
                pass
            pass
        pass
    return file_info

def md5write(file_info, checksums):
    keys = file_info.keys()
    keys.sort()
    checksums = open(checksums, 'w')
    for x in keys:
        checksum = file_info[x][0]
        try:
            #when the file is one directory deep:
            #'C8109BF6B0EF724770A66CF4ED6251A7 *001Album
1\001Track.mp3'
            dir_name = file_info[x][1][0]
            file_name = file_info[x][1][1]
            checksums.writelines('%s *%s' % (checksum,
os.path.join(dir_name, \
                file_name)))
            pass
        except IndexError:
            #when the file is in root dir:
'007CC9C12342017709A2F19AF75247BD *010Track.mp3'
            file_name = file_info[x][1][0]
            checksums.writelines('%s *%s' % (checksum, file_name))
            pass
        pass
    checksums.close()
    pass

def replace_strings(file_name, oldlist, newlist):
    try:
        new_file = open(file_name, 'r').read();
        for x in range(4):
            new_file = new_file.replace(oldlist[x], newlist[x], 1)
            pass
        remove(file_name)
        file_name = open(file_name, 'w', len(new_file))
        file_name.write(new_file)
        file_name.close()
        pass
    except IOError:
        print file_name, 'not found'
        pass
    pass

def main():
    full_path = path.abspath(path.dirname(argv[0]))
    chdir(full_path)
    chdir('..')
    checksums = path.join(full_path, 'checksums.md5')
    new_dir_names = ('Volume 1 - 1889-1929', 'Volume 2 - 1929-1945', \
        'Volume 3 - 1945-1965', 'Volume 4 - 1963-1989')
    parser = OptionParser()
    parser.add_option ('-v', '--verify', action = 'store_true', \
        dest = 'verify', help = 'verify checksums')
    parser.add_option ('-r', '--rename', action = 'store_true', dest =
\
        'rename', help = \
        'rename files to a more usable form (write rights needed)')
    (options, args) = parser.parse_args()
    if options.verify:
        verify_checksum_set(checksums)
        pass
    if options.rename:
        rename_file_set(new_dir_names, checksums)
        pass
    if not options.verify and not options.rename:
        parser.print_help()
        pass
    pass

if __name__ == '__main__':
    main()


From see.signature at no.spam  Fri May 23 10:13:29 2008
From: see.signature at no.spam (Eric Brunel)
Date: Fri, 23 May 2008 16:13:29 +0200
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
	<7xk5hll2hz.fsf@ruckus.brouhaha.com>
Message-ID: <op.ubl1sra7wepdt4@ericb.pragmadev>

On Fri, 23 May 2008 12:48:56 +0200, <//phr.cx at NOSPAM.invalid>> wrote:

> "inhahe" <inhahe at gmail.com> writes:
>> planets are spherical (all implementations of Python are not natively
>> compiled (and you said for whatever definition)), and b) It's a far cry  
>> to
>> imagine a planet coming into being that's not spherical (a language as
>> dynamic as Python, or most other scripting languages, would be either
>> extremely difficult or impossible to make a native compiler for).
>
> There are native Python compilers, see psyco and pypy.

... and C/C++ interpreters; see:
http://root.cern.ch/twiki/bin/view/ROOT/CINT
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From kamhung.soh at gmail.com  Tue May  6 19:09:08 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Wed, 07 May 2008 09:09:08 +1000
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu>
Message-ID: <op.uaq89iawev04yd@melwxp23>

On Wed, 07 May 2008 08:36:35 +1000, Michael Robertson  
<mcrobertson at hotmail.com> wrote:

> I'm having trouble opening a file in linux, whose path has spaces in it.
>
> $ mkdir my\ test
> $ echo test > my\ test/test.txt
> $ python
>
>  >>> open('./my test/test.txt')
> Exception
>  >>> open('./my\\ test/test.txt')
> Exception
>

Try a string literal by prefixing your path string with "r":

open(r'./my test/test.txt')

See http://docs.python.org/ref/strings.html

> but yet...
>
>  >>> import os
>  >>> os.chdir('./my test')
>  >>> open('./test')
>
> works just fine.

Couldn't test on Linux, but in Windows ...

>>> os.chdir('C:\temp\my test')
Traceback (most recent call last):
   File "<interactive input>", line 1, in <module>
WindowsError: [Error 123] The filename, directory name, or volume label  
syntax is incorrect: 'C:\temp\\my test'

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From lists at cheimes.de  Thu May 15 17:56:23 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 15 May 2008 23:56:23 +0200
Subject: Pass data from Python to C++
In-Reply-To: <g0hrq3$rfb$1@solaris.cc.vt.edu>
References: <g0hrq3$rfb$1@solaris.cc.vt.edu>
Message-ID: <g0ibi7$l1n$1@ger.gmane.org>

brad schrieb:
> However, other components can be written in a more user friendly, more
> easily maintained language. We've chosen Python for this. The main
> question now is how to pass the computationally heavy info to c++ from
> within Pyhton. os.system is not ideal. Just wondering how other folks do
> this? I have source to some of the c++ code, but some of it is in binary
> from only. It can take stdin or arguments.


You can either embed the C++ system as a shared library in Python or you
can embed the Python interpreter in your C++ app. Either way you should
use Python's buffer interface to access the data of your library. The
buffer interfaces allows you to create a read only or read/write view on
your data without copying the data.

Christian



From Afro.Systems at gmail.com  Sat May  3 13:20:48 2008
From: Afro.Systems at gmail.com (Tzury Bar Yochay)
Date: Sat, 3 May 2008 10:20:48 -0700 (PDT)
Subject: Phyton module for Windows Event Viewer?
References: <0a2fdb47-cc66-4ba9-aa64-4b034b84a8a7@k13g2000hse.googlegroups.com>
Message-ID: <29a2532c-3b1a-4d89-b48f-bc3a48e343e4@e39g2000hsf.googlegroups.com>


> Can someone point me in the right direction? I'm looking for a module
> to monitor the Windows Event Viewer.

http://docs.python.org/lib/module-logging.html

NTEventLogHandler is the one you should use.

happy pythoning


From erik.oosterwaal at gmail.com  Mon May 26 17:24:19 2008
From: erik.oosterwaal at gmail.com (erik.oosterwaal at gmail.com)
Date: Mon, 26 May 2008 14:24:19 -0700 (PDT)
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>

> There are a couple points I don't get here. Mostly: how is your
> application logic separated from the presentation logic if you "intermix
> code directly into the HTML" ? Or are you pages including the libs,
> getting the appropriate data out of the DB, and then including another
> file acting as a template ? If so, then how are you're "pages" different
> from MVC frameworks controllers ?

I have the WSC files as "libraries" I can open in a standard ASP page,
So for example, to get a recordset in one of my ASP pages, I would use
something like

	Dim objUsers, Recordset_of_users
	Set objUsers= GetObject("script:" & Server.MapPath("/~components/
users.wsc"))
		objUsers.open()
		Set Recordset_of_users =
objUsers.getUsersByGroup(request.queryString("group_id"))
		objUsers.close()
	Set objUsers= Nothing

I put code like this at the top of my ASP pages, and inside the HTML
code I can use "Recordset_of_users" and loop through it (for example).
All code in the asp pages is getting and setting information, or
looping through it. All real (business) logic is inside the WSC files.

The only real difference is that I don't use the "C" of MVC. I dislike
a controller that calls and routes functionality based on the URL. The
M (model) functionality is covered by the WSC files. The V (view) are
the asp pages themselves. The controller part is handled by the asp
pages aswell, just using regular links, GETs and POSTs in forms.

> But, IMHO, writing PHP-style Python webapp is silly.

:) Maybe I need to pick up a new style of programming as well, on top
of just a new language...

> Better shoot yourself in the foot with a PHP-like Python-thing, than
> committing suicide by shooting yourself into the head with PHP ...

LOL, point taken.

So to summarize: it should be possible to get exactly what I want, but
it's not advisable, because the frameworks aren't designed to work
like this. That makes sense.
I want to thank you guys for all the advice, I have a lot of
frameworks and template-engines to look into now, I'll have a look at
all that you mentioned to see which one suits me best. Judging from
the quick and thorough support from the Python community, I think I
will stick with a proven framework and/or style, so I can ask a
question once in a while.
There is probably less sense in trying to pick up a new language while
at the same time trying to stick to the methods I used in an old
language. But hey, I thought, maybe a thing like this already exists
exactly like I want it... Ah well.

Thanks again all, take care!

Erik





From aaron.watters at gmail.com  Tue May  6 11:03:13 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Tue, 6 May 2008 08:03:13 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com> 
	<ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com> 
	<3d9af15b-8b3d-4fd3-bc81-2a4ed0592a86@l64g2000hse.googlegroups.com>
Message-ID: <6ce045cd-d41b-4f63-a7ef-12b2e65d8eac@d77g2000hsb.googlegroups.com>

I'm having trouble following your discussion
and I suspect you might be a friend of Mark V Cheney.
But I will focus on this one point.

On May 5, 11:14 pm, castiro... at gmail.com wrote:
> If recursive generators are really useless (erect wall might not be),

I would like to have recursive generators --
for example to be able to traverse a tree
and yield the value at every node.  Right now
to do this you need to build a chain of generators
from each leaf to the root of the tree (or avoid
recursion by managing your own stack of nodes).
Every yield must "bubble up the tree".

With stackless Python you create the equivalent
of a "recursive generator" by using channels
-- and you can do a lot of other cool stuff with
channels too.  The "yield" (which doesn't even
require a special keyword ;) ) goes directly to
the other endpoint of the channel, with no bubbling.
It's too bad the Python that comes
installed on Macs doesn't support channels :(.

I know I didn't address your question or comments...
  -- Aaron Watters

====
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=ifdef+stackless


From gnewsg at gmail.com  Fri May  2 14:43:18 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 11:43:18 -0700 (PDT)
Subject: SSL through python. possible ?
References: <b0723bae-19b9-4d8f-b099-546a38567cb9@k37g2000hsf.googlegroups.com>
Message-ID: <a20c4a0f-5c58-400d-9ee6-6adcbe458433@k13g2000hse.googlegroups.com>

On 29 Apr, 15:56, TkNeo <tarun.... at gmail.com> wrote:
> I need to do SSL file transfer using python? Is there a library i can
> use ?
>
> Thanks.

If you have patience you can wait for Python 2.6 which will include a
new ssl module, otherwise there are a lot of third party libraries out
there which already binds OpenSSL for Python.


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From arnodel at googlemail.com  Wed May 28 13:50:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 18:50:01 +0100
Subject: Struct usages in Python
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
Message-ID: <m2fxs248ty.fsf@googlemail.com>

"Alex Gusarov" <alex.m.gusarov at gmail.com> writes:

>>  class Event(object):
>>
>> Always subclass object, unless you have a very compelling reason not to,
>> or you are subclassing something else.
>>
>
> I've thought that if I write
>
> class Event:
>     pass
>
> , it'll be subclass of object too, I was wrong?

You are wrong for Python 2.X, but right for Python 3 where old-style
classes are gone for good.

What you define with the statement

    class Event: pass

is an 'old-style' class.  Witness:

    >>> class Event: pass
    ... 
    >>> class NewEvent(object): pass
    ... 
    >>> type(Event)
    <type 'classobj'>
    >>> type(NewEvent)
    <type 'type'>
    >>> type(Event())
    <type 'instance'>
    del>>> type(NewEvent())
    <class '__main__.NewEvent'>

All old-style classes are actually objects of type 'classobj' (they
all have the same type!), all their instances are all of type 'instance'.

    >>> type(FooBar) == type(Event)
    True
    >>> type(FooBar()) == type(Event())
    True

Whereas instances of new-style classes are of type their class:

    >>> class NewFooBar(object): pass
    ... 
    >>> type(NewFooBar) == type(NewEvent)
    True
    >>> type(NewFooBar()) == type(NewEvent())
    False

However, in python 2.X (X > 2?), you can force all classes to of a
certain type by setting the global variable '__metaclass__'. So:

    >>> type(Event) # Event is an old-style class
    <type 'classobj'>
    >>> __metaclass__ = type
    >>> class Event: pass
    ... 
    >>> type(Event) # Now Event is new-style!
    <type 'type'>

HTH

-- 
Arnaud


From justjpm at aol.com  Thu May 29 10:33:07 2008
From: justjpm at aol.com (Jim)
Date: Thu, 29 May 2008 07:33:07 -0700 (PDT)
Subject: BadStatusLine error
References: <ceeac934-7e66-4426-8919-1b057589faa9@59g2000hsb.googlegroups.com>
	<6a5bqpF165l66U1@mid.uni-berlin.de>
Message-ID: <4a1139bd-d76a-44bf-8972-fedb9c833977@i76g2000hsf.googlegroups.com>

On May 28, 11:24 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jim wrote:
> > Hi
>
> > I get a BadStatusLine error (indicated below). Can anyone help with
> > how to
> > catch error in code before abort?
>
> http://docs.python.org/tut/node10.html
>
> Diez

Thanks Diez docs help. Jim



From ivan.illarionov at gmail.com  Sun May 25 21:27:12 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 01:27:12 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
	<9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>
Message-ID: <g1d3lf$1rpd$3@news.mtu.ru>

On Sun, 25 May 2008 20:53:28 -0400, Jerry Stuckle wrote:

> Ivan Illarionov wrote:
>> Jerry Stuckle wrote:
>> 
>>> As I've said before - good programmers can write good code in any
>>> language.
>> 
>> Yes, they can. But it may be harder to do for them in one language and
>> easier in another.
>> 
>> Ivan
> 
> Not for a good programmer it isn't.  I've known a few good programmers
> in my 40+ years of programming.  I've known a lot more poor programmers
> who think they're good.

I can't argue with your experience. I don't think that I'm good 
programmer. I want to be better. And I hope that when I'll have 48+ years 
experience I won't have to use it as argumentum ad hominem.


From d.a.abernathy at gmail.com  Wed May 14 16:09:32 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 14 May 2008 13:09:32 -0700 (PDT)
Subject: Using file objects with elementtree
Message-ID: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>

Hello,

Rather then holding my XML document in memory before writing it to
disk, I want to create a file object that elementtree will write each
element to has it is created. Does any one know how to do that ?

Here is my code so, far:

fd = open("page.xml", "w")
tree.write( fd, encoding="iso-8859-1")

I know there's something I am doing wrong, but I just do not know
what.


From ian.g.kelly at gmail.com  Wed May  7 05:17:35 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Wed, 7 May 2008 03:17:35 -0600
Subject: Why don't generators execute until first yield?
In-Reply-To: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <3fc761710805070217w4367e659h362257a879e14382@mail.gmail.com>

On Wed, May 7, 2008 at 2:29 AM, Martin Sand Christensen <msc at es.aau.dk> wrote:
>  Now to the main point. When a generator function is run, it immediately
>  returns a generator, and it does not run any code inside the generator.
>  Not until generator.next() is called is any code inside the generator
>  executed, giving it traditional lazy evaluation semantics. Why don't
>  generators follow the usual eager evaluation semantics of Python and
>  immediately execute up until right before the first yield instead?
>  Giving generators special case semantics for no good reason is a really
>  bad idea, so I'm very curious if there is a good reason for it being
>  this way. With the current semantics it means that errors can pop up at
>  unexpected times rather than the code failing fast.

Isn't lazy evaluation sort of the whole point of replacing a list with
an iterator?  Besides which, running up to the first yield when
instantiated would make the generator's first iteration inconsistent
with the remaining iterations.  Consider this somewhat contrived
example:

def printing_iter(stuff):
    for item in stuff:
        print item
        yield item

Clearly, the idea here is to create a generator that wraps another
iterator and prints each item as it yields it.  But using your
suggestion, this would instead print the first item at the time the
generator is created, rather than when the first item is actually
iterated over.

If you really want a generator that behaves the way you describe, I
suggest doing something like this:

def myGenerator(args):
    immediate_setup_code()

    def generator():
        for item in actual_generator_loop():
            yield item
    return generator()


From hasna1980_14 at hotmail.com  Fri May 30 08:59:13 2008
From: hasna1980_14 at hotmail.com (ha bo)
Date: Fri, 30 May 2008 12:59:13 +0000
Subject: help
Message-ID: <BLU119-W1742E42EAF4B53B2DF6FA2E0BE0@phx.gbl>

hi 
i wanna paginate my table (x lines per pages),the size of my table is changing according to the user.
i wanna know if paginator.py can help me ,if yes how?
some one can help me 
ps:i use django
thank you 

_________________________________________________________________
D?couvrez Windows Live Spaces et cr?ez votre site Web perso en quelques clics !
http://spaces.live.com/signup.aspx
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From afriere at yahoo.co.uk  Sun May 11 21:37:23 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Sun, 11 May 2008 18:37:23 -0700 (PDT)
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
Message-ID: <77887b15-0bae-43b7-a2ac-d0f079d8c80c@p39g2000prm.googlegroups.com>

On May 11, 10:54 pm, wxPytho... at gmail.com wrote:
> To create a tuple with one element, you need to do this:
>
> >>> my_tuple = (1,)    # Note the trailing comma after the value 1
> >>> type(my_tuple)
>
> <type 'tuple'>
>

You needn't at all.  You could simply do this:

>>> your_tuple = 1,

You see, it's not the parentheses that make the tuple.


> But if you do this
>
> >>> my_tuple = (1)
> >>> type(my_tuple)
>
> <type 'int'>
>
> you don't get a tuple.

For which the BDFL should make us eternally grateful.

> it would be clean if Python would convert anything put into ( ) to
> be a tuple

You seriously want 2*(3+4) to return (7,7)?  You call that "clean"?!

At least type(my_tuple) would always return 'tuple,' whether it was or
not. ;)



From nayden at gmail.com  Fri May 23 17:07:19 2008
From: nayden at gmail.com (nayden)
Date: Fri, 23 May 2008 14:07:19 -0700 (PDT)
Subject: Storing objects in relational database
Message-ID: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>

I started playing with python a few weeks ago after a number of years
of perl programming and I can say that my first impression is,
unsurprisingly, quite positive. ;)
The reason I am writing here is that I can't seem to figure out how to
save/restore python objects into a relational database.  The way I
used to do it in perl was to 'freeze' the object before storing it
into the database and 'thaw' it before restoring it. (For those not
familiar with the perl terminology freeze and thaw are method from
perl's persistence module Storable).  I found that the python's
corresponding module is Pickle but it doesn't seem to work for me.. I
do roughly the following:
class TestA:


def insert():
    i = TestA('asdf')
    output = cStringIO.StringIO()
    cPickle.dump(i, output, 2)
    print "output.getvalue(): %s" % output.getvalue()
    jd = libpq.PgQuoteBytea(output.getvalue())
    print "jd %s" % jd
    return dbpool.runOperation("insert into jobs (effective_job_id,
job_description) values (1, " + jd + ")")


From darcy at druid.net  Sun May 11 23:23:52 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Sun, 11 May 2008 23:23:52 -0400
Subject: anonymous assignment
In-Reply-To: <1XNVj.133805$Cj7.33096@pd7urf2no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
Message-ID: <20080511232352.4f96d751.darcy@druid.net>

On Mon, 12 May 2008 02:28:13 GMT
Yves Dorfsman <yves at zioup.com> wrote:
> particular case, there's got to be a better way than:
> 
> d = time.local()
> y = d[0]
> d = d[1]

Like this?

    y, d = time.local()[:2]

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From python at bdurham.com  Tue May  6 10:07:19 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 06 May 2008 10:07:19 -0400
Subject: Module to read input from commandline
In-Reply-To: <dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
References: <mailman.649.1210079867.12834.python-list@python.org>
	<dbc9e264-0aa1-42f0-ab9b-64be9139ec84@e53g2000hsa.googlegroups.com>
Message-ID: <1210082839.458.1251677385@webmail.messagingengine.com>

Hi James,

> What I was looking for was a commandline read loop that executes within a script that is already running ... or can optparse be used in
this context as well?

Apologies. I missed the nuance of the read loop within an already
running script.

Malcolm


From dotancohen at gmail.com  Thu May  8 20:04:10 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Fri, 9 May 2008 03:04:10 +0300
Subject: Write a python blog/website?
In-Reply-To: <0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>
References: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>
	<880dece00805081556hb7be637l1533cea08e054993@mail.gmail.com>
	<0169FBC4-65FF-4D22-B534-1DB15341EEA0@gmail.com>
Message-ID: <880dece00805081704i4f6c523o41fe65e645ceb890@mail.gmail.com>

2008/5/9 Sumon Sadhu <sumon.sadhu at gmail.com>:
> Hey Dotan,
>
> My apologies if this post caused offense. Your assertion is right, maybe i
> should have emailed everyone individually like i've done with the first 45
> sites, but it was never my intention to spam.

Sumon, I think that you do not understand the perception of spam in
technological circles. Today, there is no way to initiate contact with
a business offer via email. None. All email solicitations are
unwelcome. I tell you this to help you. I do not know if you receive
5000 spam messages a week like I receive, but know that a sizeable
portion of the Python list gets considerably more. These people hate
spam.

> We're programmers like yourself, trying to build something that provides a
> lot of benefit. You can see our intentions are genuine (and our python ad
> server was fun to build)

Actually, I am not a programmer by trade. I learn python for fun while
I study mechanical engineering. I read the python list for the wisdom
that passes, and rarely post.

> So while i appreciate your response, it was never my attention to be
> "spammy"

I recognized that from the beginning, and stated that in my original
post. Which should have been kept private between us, now I realize.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From gagsl-py2 at yahoo.com.ar  Mon May  5 23:43:12 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 00:43:12 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
	<2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>
	<Xns9A9573FC740FBduncanbooth@127.0.0.1>
	<bce1b718-ad05-4ecf-9bb1-d2925bc57214@2g2000hsn.googlegroups.com>
Message-ID: <op.uapraaslx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 11:08:02 -0300, Szabolcs <szhorvat at gmail.com> escribi?:

> On May 5, 12:24?pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>> Szabolcs <szhor... at gmail.com> wrote:
>> > On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
>> >> Gabriel Genellina wrote:
>>
>> >> > Python doesn't require __add__ to be associative, so this should
>> >> > not be
>> > used as a general sum replacement.
>>
>> >> It does not _require_ this, but using an __add__ that is not
>> >> commutative and associative, or has side effects, would qualify as a
>> >> serious misuse, anyway.
>>
>> > Sorry, I meant associative only, not commutative.
>>
>> Unfortunately an __add__ which is not associative is actually perfectly
>> reasonable.
>
> Well, 'reasonable' is a subjective notion in this case :-)  I have
> never seen a non-associative use of the plus sign in maths, so I would
> tend to take associativity for granted when seeing a + b + c in code,
> therefore I would avoid such uses.  (Multiplication signs are a
> different story.)  Of course others may feel differently about this,
> and technically there's nothing in the way of using a non-associative
> __add__! :)

You're approaching Python from a mathematical point of view, I presume?
Python has a perfectly defined meaning for a + b + c: simply, expressions  
are evaluated from left to right  
<http://docs.python.org/ref/evalorder.html>.
a+b+c is the same as (a+b)+c and *not* the same thing as a+(b+c).  
Parenthesis aren't required in the first case, not because addition is  
associative, but because evaluation order is clearly defined.
__add__, __mul__ and all other special methods can be used (and in fact,  
*are* used) for many kind of objects, not just numbers; the Tree example  
by Duncan Booth is a perfectly valid application. (Of course this usage  
can be abused, as any other feature, but it's not so common)

-- 
Gabriel Genellina



From miller.paul.w at gmail.com  Tue May 13 23:12:47 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Tue, 13 May 2008 20:12:47 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
Message-ID: <60319f72-5bd3-49af-8485-c9130125dd1d@a1g2000hsb.googlegroups.com>

On May 13, 10:34 am, hdante <hda... at gmail.com> wrote:

>  The "Flaming Thunder" looks promising, but without being free
> software, it's unlikely it will create a large developer community,
> specially considering both free general purpose and scientific
> programming languages.

I'll agree that software libre has the advantage in creating a
community, but the fact that this language's environment is
proprietary need not be fatal.  Consider the amount of work that gets
done every day using Maple, Matlab, and Mathematica, for instance.  I
like software that's free (as in beer or as in speech) as much as the
next guy, but I paid for the student version of Mathematica, and I
consider it worth every single penny.  I use it *at least* three or
four times a week, for stuff that'd be, at best, extremely tedious or,
at worst, impossible for me to do without it.

I took a quick look at this "Flaming Thunder," and downloaded the
command line Linux executable.  While I haven't tried anything
nontrivial in the language, I have to say it has several things going
for it:

* Cross-platform-ness.  I like the idea of being able to compile the
exact same source code for Linux, *BSD, Mac OS X, and Windows.  If it
truly is "write once, compile for the world," that's a nice plus.

* Nice web site.  Seriously.  The web site is pretty slick looking,
and that can only be a plus.  The design and color scheme definitely
remind me that this is an environment intended for scientific
computing.

* Nice name.  This has got to be *the* coolest thing about the
language.  I mean, how can you go wrong using a language named
"Flaming Thunder"? :)


From s.mientki at ru.nl  Tue May 13 18:43:33 2008
From: s.mientki at ru.nl (Stef Mientki)
Date: Wed, 14 May 2008 00:43:33 +0200
Subject: [ANN]  PPyGui emulator
Message-ID: <482A1995.5050702@ru.nl>

hello,

I've ran the first real world application through PPyGui-emulator,
so I think it's time to release the first version.
There's lot of room for improvements and a more beautiful layout.

PPyGui-emulator is build upon wxPython and released under BSD license.

For remarks, screen shots and downloads, see
http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html

have fun,

Stef Mientki


From inhahe at gmail.com  Fri May 16 10:15:36 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:15:36 -0400
Subject: ply yacc lineno not working?
References: <482D70F0.9070202@shopzeus.com>
	<mailman.1220.1210938144.12834.python-list@python.org>
Message-ID: <BEgXj.4833$Kk3.447@bignews9.bellsouth.net>

I dunno but on Dos/Windows a newline is usually \r\n (although that still 
includes a \n..)

"Laszlo Nagy" <gandalf at shopzeus.com> wrote in message 
news:mailman.1220.1210938144.12834.python-list at python.org...
> I'm sorry for the dumb question. I had to add these to the lexer:
>
> def t_comment(t):
>    r"\#[^\n]*\n"
>    t.lexer.lineno += 1
>    # We do not return anything - comments are ignored.
>
> # Define a rule so we can track line numbers
> def t_newline(t):
>    r'\n+'
>    t.lexer.lineno += len(t.value)
>
>
> Well, it is not very straightforward. From the docs, it was not clear that 
> I HAVE TO increment t.lexer.lineno in my lexer if you want yacc to parse 
> line numbers. But it is logical. I believe this could be done 
> automatically, since "line number" ALWAYS means "\n", there is nothing to 
> be configured here. (Am I wrong? There can be parsers to parse files where 
> new lines are chr(255) or something?)
>
> Thanks,
>
>   Laszlo
> 




From Lie.1296 at gmail.com  Sun May 18 09:34:10 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:34:10 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
	<mailman.838.1210309971.12834.python-list@python.org>
Message-ID: <74de3764-b926-4f7c-89b4-fe9aaec4ce96@w34g2000prm.googlegroups.com>

On May 9, 12:12?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 08 May 2008 22:57:03 -0300, ?
> <andrej.panj... at climatechange.qld.gov.au> escribi?:
>
>
>
> > On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> >> No, no, no, no, no!
> > Geez. ?Go easy.
> >> You have got it entirely wrong here. Your XOR function simply
> [...]
> > Pardon my tetchiness, but it is a little hard to receive such blunt
> > and inflexible replies to my posts.
>
> Don't take it so seriously. I would have written a reply in the same tone. ?
> Weeds must be uprooted early :)
>
> > Both the responses offer lambda free alternatives. ?That's fine, and
> > given the terse documentation and problems that I had understanding
> > them, I would agree. ?So what applications are lambdas suited to? ?I
> > think the parameterised function model is one.
> > What else?
>
> It should be clear now that lambda is just a shortcut for defining a ?
> normal function using "def", except it has no name, and it can handle ?
> expressions only (no statements).
> So you never *need* a lambda. But in a few cases they're useful:
>
> - Most GUIs are event-driven, and let you bind a function (or any other ?
> callable object) to be executed when certain event happens (by example, ?
> when certain button is pressed, or a menu item is selected). Usually an ?
> instance method is used: Button("Total", onclick=self.calculate_total). ?
> Suppose you're developing a calculator; the ten buttons labeled '0' to '9' ?
> should inserte the corresponding digit. To do that, you should write ten ?
> functions insert_digit_0 to insert_digit_9 (and they would be ?
> one-line-functions: insert_digit('0') ... insert_digit('9')). Too boring :(
> The usual idiom is something like this:
> ? ? ?Button("0", onclick=lambda: self.insert_digit('0'))
> ? ? ?Button("5", onclick=lambda: self.insert_digit('5'))
>
> - To write an expression that is to be evaluated lazily (perhaps only if ?
> certain other conditions are met). Older Python versions didn't have a ?
> conditional expression like C's :? ternary operator, and one possible way ?
> to emulate it is this:
>
> def iif(cond, if_true, if_false):
> ? ? ?if cond:
> ? ? ? ? ?return if_true()
> ? ? ?else:
> ? ? ? ? ?return if_false()
>
> iff(x!=2, lambda: 1/(x-2), lambda: 100)
>
> You can't write iff(x!=2, 1/(x-2), 100) because arguments are evaluated ?
> before the function is called, and with x=2 you get an error.
>

Calling iff would give a NameError. I wonder why... perhaps because
iif is so iffy?


From mmanns at gmx.net  Mon May 12 18:23:12 2008
From: mmanns at gmx.net (Martin Manns)
Date: Tue, 13 May 2008 00:23:12 +0200
Subject: ANN: pyspread 0.0.5
Message-ID: <mailman.1032.1210668518.12834.python-announce-list@python.org>

pyspread 0.0.5 has been released.

--

New features are:
+ X, Y, Z for relative cell relations are now pre-processed (easier to
use)
+ Cells can be given a name with <name>=<expresion>. These names are
located in the global namespace
+ Arrays and matrices within one cell can now easily be spread out to a
cell range in the grid with the spread function. (spread(x,y,z,value)
where x,y,z represents the top-left-front target cell and value is
replaced by the origin cell reference)
+ Rows and columns can be inserted and deleted
+ Copy, Paste and Delete behaviour improved
+ Copy and Paste now work in cell editor when no selection is present
+ Basic tab-delimited text import added

--

About: 
pyspread is a spreadsheet that accepts a pure python expression in
each cell.

--

Highlights:
+ No non-python syntax add-ons
+ Access to python modules from cells
+ 3D grid
+ Numpy object array for representation of string entry into grid cell
+ Numpy object array for representation of eval function array
+ Cell access via slicing of numpy function array
+ X, Y, and Z yield current cell location for relative reference

Requires: Python >=2.4, Numpy 1.0.4, and wxPython 2.8.7.1.
License: GPL

Project page: http://pyspread.sourceforge.net

Best Regards

Martin




From gagsl-py2 at yahoo.com.ar  Fri May 16 21:16:47 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 16 May 2008 22:16:47 -0300
Subject: Malloc error
References: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>
Message-ID: <op.ua9xt9t8x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 May 2008 16:08:41 -0300, mankoff <mankoff at gmail.com> escribi?:

> I'm brand spanking new to Python. Never coded in it, but I'm
> comfortable coding in general in other languages.

Welcome...!

> I'm Trying to get
> some legacy code to run on a newer machine. I don't have access to the
> legacy box for debugging.
>
> I'm getting the following error:
>
> Python(36979) malloc: *** error for object 0x88374: Non-aligned
> pointer being freed
> *** set a breakpoint in malloc_error_break to debug

Ouch. I'd like to think that the error doesn't come from Python itself but  
 from some compiled C extension. Are you using any?
I'd try with the same Python version the legacy box had, if it was older  
than 2.5.2

-- 
Gabriel Genellina



From cshirky at gmail.com  Mon May 12 11:05:39 2008
From: cshirky at gmail.com (cshirky)
Date: Mon, 12 May 2008 08:05:39 -0700 (PDT)
Subject: buffering choking sys.stdin.readlines() ?
Message-ID: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>

Newbie question:

I'm trying to turn a large XML file (~7G compressed) into a YAML file,
and my program seems to be buffering the input.

IOtest.py is just

  import sys
  for line in sys.stdin.readlines():
    print line

but when I run

$ gzcat bigXMLfile.gz | IOtest.py

but it hangs then dies.

The goal of the program is to build a YAML file with print statements,
rather than building a gigantic nested dictionary, but I am obviously
doing something wrong in passing input through without buffering. Any
advice gratefully fielded.

-clay


From wuwei23 at gmail.com  Wed May 21 06:04:37 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:04:37 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
Message-ID: <06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com>

On May 21, 6:58 pm, jonbutle... at googlemail.com wrote:
> Its not a variable I set, its one of HTMLParser's inbuilt variables. I
> am using it with urlopen to get the source of a website and feed it to
> htmlparser.
>
> def parse(self, page):
>         try:
>             self.feed(urlopen('http://' + page).read())
>         except HTTPError:
>             print 'Error getting page source'
>
> This is the code I am using. I have tested the other modules and they
> work fine, but I havn't got a clue how to fix this one.

You're not providing enough information. Try to post a minimal code
fragment that demonstrates your error; it gives us all a common basis
for discussion.

Is your Spider class a subclass of HTMLParser? Is it over-riding
__init__? If so, is it doing something like:

    super(Spider, self).__init__()

If this is your issue, looking at the HTMLParser code you could get
away with just doing the following in __init__:

    self.reset()

This appears to be the function that adds the .rawdata attribute.

Ideally, you should use the former super() syntax...you're less
reliant on the implementation of HTMLParser that way.

- alex23


From deets at nospam.web.de  Thu May 29 18:41:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 00:41:32 +0200
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <mailman.1747.1212084126.12834.python-list@python.org>
References: <mailman.1747.1212084126.12834.python-list@python.org>
Message-ID: <6a8pp3F32oqhfU1@mid.uni-berlin.de>

Sells, Fred schrieb:
> Diez wrote: 
>> Why don't you create KID-template like this:
>>
>> <div py:strip="True">${root}</div>
>>
>> and in the controller say
>>
>> @expose("thexmltemplate")
>> def ...
>>    return dict(root=myElementTreeRoot)
>>
> sounds good.  Does that "py:strip" remove the <div> and anything outside it.  I'll be doing a flex style ajax call and it wants just the xml data tree.

http://www.kid-templating.org/language.html#stripping-tags-py-strip

The time it took to ask the question would have answered it by just 
trying...

Diez



From notnorwegian at yahoo.se  Sun May 25 21:04:35 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Sun, 25 May 2008 18:04:35 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<y1r1w3qan3p.fsf@ics.uci.edu>
	<6610cad9-384d-4755-9a2c-c605329be217@8g2000hse.googlegroups.com>
	<69sj10F34jb08U3@mid.uni-berlin.de>
	<a5397f90-34ef-4c88-adaf-deda6f6f4517@27g2000hsf.googlegroups.com>
	<JEm_j.2685$Q57.2661@nlpi065.nbdc.sbc.com>
Message-ID: <5cae3f71-c699-4faa-97f3-d4c33e2daf9b@d77g2000hsb.googlegroups.com>

On 26 Maj, 01:30, I V <ivle... at gmail.com> wrote:
> On Sun, 25 May 2008 15:49:16 -0700, notnorwegian wrote:
> > i meant like set[pos], not iterate but access a specific position in the
> > set.
>
> If you need to access arbitrary elements, use a list instead of a set
> (but you'll get slower inserts). OTOH, if you just need to be able to get
> the next item from the set, you can use an iterator:
>
> > now i have to do:
> > s = toSet.pop()
> > toSet.add(s)
>
> i = iter(toSet)
>
> s = i.next()
>
> > if i want to get the url of the next item in a set, how would i do that?
> > i can do this with a list:
>
> > def scrapeSitesX(startAddress, toList, listPos): return
> > scrapeSites(toList[listPos], toList, listPos+1) to use recursion with a
> > list.
> > i can work around that but it doesnt get as elegant.
>
> Do you have to use recursion here? Why not:
>
> for site in toList:
>         scrape(site)


i have tried both.

anyway how do i concatenate sets? which i have to if use to funcions
like you suggest.

and also when iterating a set is there any other way to avoid
exceptions than have a counter and compare to len(set).
is there no method that cna check if iter != None


From roy at panix.com  Fri May  2 23:38:39 2008
From: roy at panix.com (Roy Smith)
Date: Fri, 02 May 2008 23:38:39 -0400
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
Message-ID: <roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>

In article 
<80747335-9d08-48c9-bcc6-e66b6f2ef656 at l42g2000hsc.googlegroups.com>,
 "Giampaolo Rodola'" <gnewsg at gmail.com> wrote:

> Thanks a lot. I've been able to listen on ::1:21 after having
> installed IPv6 on both Windows and Linux thanks to your suggestions.
> I'd like to ask one more question: is it possible to bind my server on
> both IPv4 and IPv6 addresses (note: I do not use multiple threads or
> processes)?

In theory, you should be able to bind your server socket to an IPv6 port 
and have it accept connections from both IPv4 and IPV6 clients.  The v4 
connections will show up as IPv4-mapped IPv6 addresses (i.e. with a 
::ffff/96 prefix).  In practice, support for this is spotty.  The Wikipedia 
IPv4_mapped_address article claims, for example, that no windows OS prior 
to vista supports it.

In the application I work on, we've avoided this.  We just listen on two 
separate sockets (one for each address family).  We wrote a DualSocket 
class which manages the two underlying single-protocol sockets and makes 
them appear to be a single dual-protocol socket.  It was a lot of user code 
to write, compared with using the mapped address mechanism, but at least 
it's portable to every OS we've seen that support IPv6.

You don't need multi-threading to handle multiple sockets.  In our 
implementation, for example, we use select() in a single thread to 
multiplex the two.


From catphive at catphive.net  Fri May  2 15:20:04 2008
From: catphive at catphive.net (Brendan Miller)
Date: Fri, 2 May 2008 12:20:04 -0700
Subject: portable /dev/null
Message-ID: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>

Hi,

I have functions that take a file object and write to it. In some cases I
just want to throw out what is written to that file object. I want
something like open('/dev/null', 'w'), but portable.

It needs to have an underlying file descriptor/file handle, as it will be
passed to non python code.

Is there a portable /dev/null somewhere in the standard library?

Thanks,
Brendan


From kyosohma at gmail.com  Tue May  6 10:07:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 6 May 2008 07:07:01 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <74f98740-6f44-44da-b546-dc1cb1bb9006@a23g2000hsc.googlegroups.com>

On May 6, 8:44?am, jmDesktop <needin4mat... at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces. ?Is
> that correct? ?Is my schooling for nought on these OOP concepts if I
> use Python. ?Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.) ?I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost. ?Thank you.

In my school, we didn't even discuss the concept of interfaces (except
for CLI and GUI, that is). So I looked it up. I assume you are
referring to something like what's found here:

http://java.sun.com/docs/books/tutorial/java/concepts/interface.html

If so, then it looks like an Interface is a generic class with method
stubs. You can do that with Python just as easily by creating empty
methods with just the "pass" keyword. It also reminds me of
Decorators...so you might want to look at those.

Since it's just a construct to implement polymorphism, I don't think
you'll lose anything. However, Python does not require you to re-
implement every method of the class it is inheriting from. You can
just override those that you want and leave the others alone.

Hopefully I understand this correctly...otherwise, just ignore my
babbling and hand waving.

Mike


From python-url at phaseit.net  Mon May 26 14:13:11 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 26 May 2008 18:13:11 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 26)
Message-ID: <g1eujn$jbn$1@lairds.us>

QOTW:  "GHUM:  There are no big applications written in Python.

GHUM:  Big applications are written in JAVA or COBOL or C# or other legacy
programming systems.

GHUM:  If you programm in Python, your applications become quite small. Only
frameworks in Python are big.

JMC:  So the fact that there are no big applications written in Python IS the
success story." - Harald Armin Massa and D'Arcy J.M. Cain
    http://coding.derkeiler.com/Archive/Python/comp.lang.python/2008-04/msg03005.html

    
    Assign a value and test for it in a single statement:
        http://mail.python.org/pipermail/python-list/2008-May/492988.html
        http://mail.python.org/pipermail/python-list/2008-May/492425.html
    
    D'Arcy J.M. Cain et al. combat the heterodoxy of David which questions
    the usefulness of unit tests and test-driven development in general:
        http://mail.python.org/pipermail/python-list/2008-May/493057.html
    
    Comparing identity vs. comparing equality: what's the difference?
        http://mail.python.org/pipermail/python-list/2008-May/492117.html
    
    Relationship between logic and interface: the MVC pattern:
        http://mail.python.org/pipermail/python-list/2008-May/492816.html
    
    It isn't easy to alter how functions compare themselves (to avoid
    duplicates, for example):
        http://mail.python.org/pipermail/python-list/2008-May/493182.html
    
    Organizing a project (directory layout):
        http://mail.python.org/pipermail/python-list/2008-May/492010.html
    
    Poll: How do you use Python in non-GUI work?
        http://mail.python.org/pipermail/python-list/2008-May/491989.html
    
    PHP compared to Python:
        http://mail.python.org/pipermail/python-list/2008-May/492561.html
    
    Is this language suitable for Operations Research?
        http://mail.python.org/pipermail/python-list/2008-May/491867.html
    
    Oldest thread still alive (from May 7): lambda expressions, now
    talking about decorators:
        http://mail.python.org/pipermail/python-list/2008-May/490027.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
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  http://purl.org/thecliff/python/url.html (dormant)
or
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There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
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(approximately), ask <claird at phaseit.net> to subscribe.  Mention
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From moustafa.elmihy at gmail.com  Tue May  6 03:56:30 2008
From: moustafa.elmihy at gmail.com (moustafa.elmihy at gmail.com)
Date: Tue, 6 May 2008 00:56:30 -0700 (PDT)
Subject: read line
Message-ID: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>

hi every body,

I'm a new python user and I'm making a program to run useing Abaqus
and there is something I can't do,

if i have a text file that has a line like this " 10   20  30     40
50" and I wana do the coding to put every number of these like 10 or
20 in a separate variable .. any suggestions ??

thanks in advance


From darcy at druid.net  Wed May  7 07:23:27 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Wed, 7 May 2008 07:23:27 -0400
Subject: License selection for free software
In-Reply-To: <7xej8eirha.fsf@ruckus.brouhaha.com>
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
	<mailman.675.1210104317.12834.python-list@python.org>
	<7xej8eirha.fsf@ruckus.brouhaha.com>
Message-ID: <20080507072327.05199eba.darcy@druid.net>

On 06 May 2008 23:00:01 -0700
Paul Rubin <"http://phr.cx"@NOSPAM.invalid> wrote:
> "Matt Porter" <mabbikeel at gmail.com> writes:
> > > Python's non-GPL license certainly is annoying to some of us.
> > I'm intrigued - how can it be annoying?
> 
> It means GPL'd contributions can't be included in the main Python distro.

That's exactly what makes the GPL annoying to some of us.  It just
depends on your point of view.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From sturlamolden at yahoo.no  Tue May 20 18:47:29 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 15:47:29 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <5437a7a8-40bf-4858-a30b-a91220529463@b5g2000pri.googlegroups.com>

On May 20, 3:37 pm, brad <byte8b... at gmail.com> wrote:

> seen this first hand. Getting results back the same day or sooner may be
> important. In cases such as this, I use C or C++... nothing else will
> do. Nothing else is as fast.

Right. Tell that to the Fortran community. And by the way:

http://latticeqcd.blogspot.com/2006/11/why-we-use-fortran-and-python.html





From bearophileHUGS at lycos.com  Sun May 25 16:45:13 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sun, 25 May 2008 13:45:13 -0700 (PDT)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org> <eci_j.4164$mh5.917@nlpi067.nbdc.sbc.com>
Message-ID: <83bb3e45-f32f-4811-831f-d1e31d4fcb1e@d77g2000hsb.googlegroups.com>

I V:
> You might instead want to
>wrap the lambdas in an object that will do the comparison you want:

This looks very nice, I haven't tried it yet, but if it works well
then it may deserve to be stored in the cookbook, or better, it may
become the built-in behavior of hashing functions.

Bye,
bearophile


From cokofreedom at gmail.com  Tue May  6 11:21:08 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 08:21:08 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>
	<29716374-c3b2-407e-ac54-ae2a17ccf081@2g2000hsn.googlegroups.com>
Message-ID: <4dbd4d59-c4e5-4910-bcfd-7e0b2b3bbcef@59g2000hsb.googlegroups.com>

> I would imagine this is why I haven't found any schools teaching
> Python in their basic programming classes too.  On the dynamic typing,
> isn't that the same sort of thing that lots of scripting languages
> do?  VBScript doesn't require you to define your variables, but I
> don't really want to use it for anything (used to use it a lot in
> Classic ASP.)  I believe everyone that Python is great, but some of it
> doesn't make sense to me as to why.  Thanks.

Well, school-wise we got taught VB because it was easy for the non-
programmers. At university I learnt Java, C++, Haskell, Fortran and
Python. My favourite is obviously Python.

So here is my terrible (likely wrong) view of Python:

Python is a dynamic programming language, different to static ones
like Java or C++, and variables-wise, well you do have types, but it
is up to the interpreter to understand what to do with them. From my
understanding "variables" as you call them can be the following;
Integer 1, String "Hello", Tuple (), List [], Dictionary {} and a
higher level function (you can assign functions as varaible names,
that personally is amazing!).

Python is built to be easy to read, I think Guido (BDFL) said
something about 10% of the time code is written, 90% it is read, or
something to that affect. The point is that anyone who knows Python to
even a small degree should be able to pick up someone elses code and
given a small time understand the idea of it, even with any comments.

That is very powerful and key to the idea of Python, and my main love
for it. The issue I get from University is this idea that OOP is the
way to program, it is one of the ways, not the be all and end all. I
almost died when I got shown Haskell because nothing made sense, but
after using Python and returning, I understood more of the logic
because I had used the same techniques (in a more readable format) in
Python before.

A common bug people suffer from when trying a new language is doing
things how they would in their previous language of choice. Python is
not Java, or C++ or anything else other than Python. So read a few
tutorials on Python, see what people say it is good at and use it for
that purpose.  I think it is an advantage to know how to do things
with different languages in different formats, but it is important to
know when to use one method over another. Personally DiveIntoPython
was a great guide for me as to the uses and benefits of Python, at a
basic level. Try googling it and reading the (free) articles and
tutorials online.

And welcome to Python, the grass is greener :)


From dannywebster at googlemail.com  Fri May  9 05:10:56 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Fri, 9 May 2008 02:10:56 -0700 (PDT)
Subject: Grabbing previous iteration in a dict
Message-ID: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>

Hello all,

I have a dictionary of which i'm itervalues'ing through, and i'll be
performing some logic on a particular iteration when a condition is
met with trusty .startswith('foo').  I need to grab the previous
iteration if this condition is met.  I can do something with an extra
var to hold every iteration while iterating, but this is hacky and not
elegant.

Is there a mechanism whereby I can just index the dict value
subscripts like in an array? I could just rewind by 1 if so.

Cheerz

dan.


From tomupton33 at yahoo.com  Thu May  1 10:23:24 2008
From: tomupton33 at yahoo.com (mickey333)
Date: Thu, 1 May 2008 07:23:24 -0700 (PDT)
Subject: free fiction-- look
Message-ID: <80dbac1d-81e6-4dae-b2bd-99aaf320d7e7@y38g2000hsy.googlegroups.com>

http://www.authspot.com/Short-Stories/Disability.107809


From kyosohma at gmail.com  Wed May  7 10:47:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Wed, 7 May 2008 07:47:49 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f87cc4ea-dad7-48dd-a743-ecb83b78a108@w7g2000hsa.googlegroups.com> 
	<mailman.705.1210170042.12834.python-list@python.org>
Message-ID: <b152cd19-836a-4629-870c-2a9bc6339c95@d45g2000hsc.googlegroups.com>

On May 7, 9:19?am, Tim Golden <m... at timgolden.me.uk> wrote:
> Mike Driscoll wrote:
> > On May 7, 4:45 am, Tim Golden <m... at timgolden.me.uk> wrote:
> >> In a spirit of being helpful... :)
>
> [... snip registry walker ...]
>
> > This is pretty cool stuff, Tim. Of course, it would also seriously
> > screw up some programs if you decided to replace the wrong phrase.
> > Just a word of warning to the OP: be sure to make a backup of the
> > registry before doing something like this. Trying to fix a messed up
> > registry from the command line is not a fun way to spend the
> > afternoon.
>
> Good point, Mike. In a spirit of being even more helpful... the _winreg
> module includes the functions SaveKey and LoadKey so as a crude
> backup mechanism, you could do this:
>
> <code snippet>
> import time
> import _winreg
> import win32api
> import win32security
>
> #
> # You need to have SeBackupPrivilege enabled for this to work
> #
> priv_flags = win32security.TOKEN_ADJUST_PRIVILEGES | win32security.TOKEN_QUERY
> hToken = win32security.OpenProcessToken (win32api.GetCurrentProcess (), priv_flags)
> privilege_id = win32security.LookupPrivilegeValue (None, "SeBackupPrivilege")
> win32security.AdjustTokenPrivileges (hToken, 0, [(privilege_id, win32security.SE_PRIVILEGE_ENABLED)])
>
> root = _winreg.OpenKey (_winreg.HKEY_LOCAL_MACHINE, r"Software\Python\TEST")
> #
> # This will fail if the file already exists so make it uniqueish
> #
> _winreg.SaveKey (root, "c:/temp/HKLM_Software_Python-%s.reg" % ?time.strftime ("%Y%m%d-%H%M%S"))
>
> </code snippet>
>
> Note that the file which this creates is *not* the same as a .reg file which the File > Export menu
> option provides from within the registry editor. (In fact, I shouldn't really have called it .reg; call
> it something else). It can be reloaded by the _winreg.LoadKey function -- which I notice is incorrectly
> named RegLoadKey in the docs after the underlying API call. The docs note that SeRestorePrivilege is
> required for this action, the counterpart to SeBackupPrivilege.
>
> TJG

Wow! Talk about going above and beyond the call of tutoring! I still
don't know how you found out how to do all these neat Windows tricks,
but I'll be filing them away for future reference.

Mike


From lists at cheimes.de  Tue May 13 18:38:44 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 14 May 2008 00:38:44 +0200
Subject: Purpose of operator package
In-Reply-To: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
References: <cca4c2f1-a833-4421-a101-e3a65e93be64@y38g2000hsy.googlegroups.com>
Message-ID: <482A1874.6060105@cheimes.de>

Eric Anderson schrieb:
> Seems like unnecessary code but obviously I know nothing about Python.

Correct, the truth example isn't a good example. "if argv" is better.
But you can write interesting things with the operator module. For example

>>> import operator
>>> def fac(x):
...     return reduce(operator.mul, range(1, x+1))
...
>>> fac(2)
2
>>> fac(3)
6
>>> fac(4)
24

In general one doesn't use the operator module.

Christian



From jaywgraves at gmail.com  Tue May 20 14:45:18 2008
From: jaywgraves at gmail.com (jay graves)
Date: Tue, 20 May 2008 11:45:18 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <d020283f-b921-4806-b809-b7e4ef1a0a37@z24g2000prf.googlegroups.com>

On May 20, 1:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

How about this?

mov = open(afile)
first = mov.next()
# check first for ':' and do whatever you need to do
# including the 'y' processing from below if required
for line in mov:
        do y

...
Jay Graves


From fiacre.patrick at gmail.com  Fri May 23 01:44:17 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:44:17 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <mailman.1484.1211483172.12834.python-list@python.org>
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
	<mailman.1484.1211483172.12834.python-list@python.org>
Message-ID: <483659b1$0$11621$607ed4bc@cv.net>

Dan Upton wrote:
> On Thu, May 22, 2008 at 2:53 PM, Mensanator <mensanator at aol.com> wrote:
>> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>>
>>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>> If you actually need that many digits, use a different library.
>>
>>>>> import gmpy
>>>>> print gmpy.pi(64) # 64 bit precision
>> 3.14159265358979323846
>>>>> print gmpy.pi(128) # 128 bit precision
>> 3.141592653589793238462643383279502884197
>>>>> print gmpy.pi(16384) # 16384 bit precision
>> 3.14159265358979323846264338327950288419716939937510582097494459

...

> 
> Who wants to verify that that's correct to that many digits? ;)


Ramanujan?

http://numbers.computation.free.fr/Constants/Pi/piramanujan.html



From wuwei23 at gmail.com  Thu May 22 20:20:38 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 17:20:38 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com> 
	<2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com>
Message-ID: <369c3d5f-69e0-4609-9638-f75c7af94a4e@t12g2000prg.googlegroups.com>

On May 23, 5:06 am, jonbutle... at googlemail.com wrote:
> Nope, this is my first experience with object oriented programming,
> only been learning python for a few weeks but it seemed simple enough
> to inspire me to be a bit ambitious. If you could hook me up with some
> good docs that would be great. I was about to but a book on python,
> specifically OO based, but il look at these docs first. I understand
> most of the concepts of inheritance, just not ever used them before.

Ah, okay, I'm really sorry, if I'd known I would've tried to explain
things a little differently :)

Mark Pilgrim's Dive Into Python is a really good place to start:
http://www.diveintopython.org/toc/index.html

For a quick overview of object oriented programming in Python, try:
http://www.freenetpages.co.uk/hp/alan.gauld/
Specifically: http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm

But don't hesitate to ask questions here or even contact me privately
if you'd prefer.


From umpsumps at gmail.com  Wed May  7 16:00:48 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Wed, 7 May 2008 13:00:48 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
	<m2fxsu55ri.fsf@googlemail.com>
Message-ID: <55671aeb-fbd7-432e-b2f2-f558bc8e1702@s33g2000pri.googlegroups.com>

That's a great suggestion Arnaud.  I'll keep that in mind next time I
post code. Thanks ;)


On May 7, 12:27 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
> umpsu... at gmail.com writes:
> > Hello,
>
> > Here is my code for a letter frequency counter.  It seems bloated to
> > me and any suggestions of what would be a better way (keep in my mind
> > I'm a beginner) would be greatly appreciated..
>
> > def valsort(x):
> >    res = []
> >    for key, value in x.items():
> >            res.append((value, key))
> >    return res
>
> > def mostfreq(strng):
> >    dic = {}
> >    for letter in strng:
> >            if letter not in dic:
> >                    dic.setdefault(letter, 1)
> >            else:
> >                    dic[letter] += 1
> >    newd = dic.items()
> >    getvals = valsort(newd)
> >    getvals.sort()
> >    length = len(getvals)
> >    return getvals[length - 3 : length]
>
> > thanks much!!
>
> I won't comment on the algorithm, but I think you should try to find
> better names for your variables.  In the snippet above you have x,
> res, dic, newd, length, getvals which don't give much of a clue as to
> what they are used for.
>
> e.g.
>
> * dic = {}
> We know it's a dict, but a dict of what?
>
> * newd = dic.items()
> Sounds like 'new dictionary', but obviously isn'tas it is a list
> of key,value pairs.
>
> * length = len(getvals)
> Again, we know it's a length, but the length of what?
>
> HTH
>
> --
> Arnaud



From sandip.more at gmail.com  Mon May  5 02:35:51 2008
From: sandip.more at gmail.com (sandipm)
Date: Sun, 4 May 2008 23:35:51 -0700 (PDT)
Subject: config files in python
Message-ID: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>

Hi,
 In my application, I have some configurable information which is used
by different processes. currently I have stored configration in a
conf.py file as name=value pairs, and I am importing conf.py file to
use this variable. it works well

import conf
print conf.SomeVariable

but if I need to change some configuration parameteres,  it would need
me to restart processes.

I want to store this data in some conf file (txt) and would like to
use it same way as I am using these variables as defined in py
files.

one solution I can think of is writing data as a dictionary into conf
file. and then by reading data, apply eval on that data. and update
local dict? but this is not a good solution....

any pointers?

Sandip


From amit.uttam at gmail.com  Fri May 16 20:34:56 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Fri, 16 May 2008 17:34:56 -0700 (PDT)
Subject: Separate output for log file and stdout
Message-ID: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>

Hey everyone,

I've recently jumped big time into python and I'm working on a
software program for testing automation. I had a question about proper
logging of output. What I would like is:

 1. a function syslog (to log output to log file only)
 2. a function stdout (to log output to stdout only)
 3. a function sslog (to log output to both log and stdout)

Right now I am using StandOut module http://www.voidspace.org.uk/python/standout.html

It is quite useful but I can't seem to get good fine grained control
as my requirements.

How do the rest of you guys (gals) do this logging?

Thanks,
Amit


From duncan.booth at invalid.invalid  Thu May  8 05:46:37 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 May 2008 09:46:37 GMT
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
	<fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>
	<Xns9A985A46AEA62duncanbooth@127.0.0.1>
	<ce2982c0-755f-4d89-8f5c-9c32384ae05e@y38g2000hsy.googlegroups.com>
Message-ID: <Xns9A986D951A8AFduncanbooth@127.0.0.1>

Arnaud Delobelle <arnodel at googlemail.com> wrote:

> 
> 
> Duncan Booth wrote:
>> Arnaud Delobelle <arnodel at googlemail.com> wrote:
>>
>> >
>> >
>> > George Sakkis wrote:
>> >> One of the few Python constructs that feels less elegant than
>> >> necessary to me is the del statement. For one thing, it is 
overloaded
>> >> to mean three different things:
>> >> (1) del x: Remove x from the current namespace
>> >> (2) del x[i]: Equivalent to x.__delitem__(i)
>> >> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))
>> >
>> > Note that the 'X = Y' construct has the corresponding three 
meanings:
>> >
>> > (1) x = 4 # Bind x to 4 in the 'current namespace'
>> > (2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
>> > (3) x.a = 4 # Equivalent to x.__setattr__('a', 4)
>>
>> I think you both missed a case:
>>
>>   (1b) global x; del x    # Remove x from global namespace
>>   (1b) global x; x = 4    # Bind x to 4 in the global namespace
> 
> This is why you put 'current namespace' in quotes!  But all three of
> us missed the case:

I'd assumed you were just trying to say that the current namespace might 
be different things: locals or a class namespace. I would say that the 
global statement makes the assign/del refer to a non-current namespace.

> 
> (1-3000) What about nonlocal?

What about nonlocal? You can't (in Python 2.x) assign or del a name from 
an enclosing scope if that's what you mean. If that isn't what you mean 
then you'll have to explain it to me in simpler terms.



From floris.bruynooghe at gmail.com  Fri May  9 07:41:16 2008
From: floris.bruynooghe at gmail.com (Floris Bruynooghe)
Date: Fri, 9 May 2008 04:41:16 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org> 
	<3d47e5d2-8e7c-497d-b461-7cc6ff1beb58@a1g2000hsb.googlegroups.com>
Message-ID: <383c934a-0a23-401f-bc09-898be0941be0@e39g2000hsf.googlegroups.com>

On May 9, 11:19?am, spectru... at gmail.com wrote:
> Thanks for the replies.
>
> On May 8, 5:50?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>
> > Ctrl+C often works with Python, but as with any language, it's possible
> > to write a program which will not respond to it. ?You can use Ctrl+\
> > instead (Ctrl+C sends SIGINT which can be masked or otherwise ignored,
> > Ctrl+\ sends SIGQUIT which typically isn't)
>
> Yes, thank you, this seems to work. :)
>
> I did some more testing and found out that the problem seems to be
> thread-related. If I have a single-threaded program, then Ctrl+C
> usually works, but if I have threads, it is usually ignored. For
> instance, the below program does not respond to Ctrl+C (but it does
> die when issued Ctrl+\):
>
> import threading
>
> def loop():
> ? while True:
> ? ? pass
>
> threading.Thread(target=loop,args=()).start()

Your thread needs to be daemonised for this work.  Othewise your main
thread will be waiting for your created thread to finish.  E.g.:

thread = threading.Thread(target=loop)
thread.setDaemon(True)
thread.start()

But now it will exit immediately as soon as your main thread has
nothing to do anymore (which is right after .start() in this case), so
plug in another infinite loop at the end of this:

while True:
    time.sleep(10)

And now your threaded app will stop when using C-c.


From mnikhil at gmail.com  Tue May 20 14:14:56 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:44:56 +0530
Subject: preserve history in the interactive python
References: <g0v49v$2ab$1@registered.motzarella.org>
Message-ID: <g0v4f0$2ab$2@registered.motzarella.org>

Nikhil wrote:
> Hi,
> 
> I am using python -i, and I find it hard typing/pasting the commands 
> from the previous interactive shell. Basically, is there anyway that I 
> can preserve the history in the shell?
> I guess but not sure there should be something like ~/.pyrc for 
> configuring such but can someone please let me know what is the 
> effective environment variable to preserve the history?
> 
> Thanks,
> Nikhil
 >>there should be something like ~/.pyrc
please read it as something in a file pointed by PYTHONSTARTUP 
environment variable. I am mostly here interested in saving the python 
shell's history automatically.

Nikhil


From castironpi at gmail.com  Tue May 20 14:13:41 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 11:13:41 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
	<slrng35rce.8v2.nick@irishsea.home.craig-wood.com>
Message-ID: <3dfd6be8-b6ca-42b9-a46e-c4c520fda352@z72g2000hsb.googlegroups.com>

On May 20, 10:30?am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Monica Leko <monica.l... at gmail.com> wrote:
> > ?On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> > > You want your file considered as a sequence of bits rather
> > > than a sequence of 8-bit bytes, do you?
>
> > ?Yes.
>
> > > is the 10-bit bit-pattern to be stored at an arbitrary
> > > bit-position in the file
>
> > ?Yes. ?I need arbitrary, 8bits, than 10 bits for something else, than
> > ?sequence of bytes, than 10 bits again, etc.
>
> You could try
>
> ?http://construct.wikispaces.com/
>
> which could well do exactly what you want.
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Do you have space to waste?  If so, how much?  Worst case, you could
be looking at a factor of 32 or higher, if each bit took an entire
system word.


From frederic.degraeve at gmail.com  Thu May 22 09:18:20 2008
From: frederic.degraeve at gmail.com (=?ISO-8859-1?Q?Fr=E9d=E9ric_Degraeve?=)
Date: Thu, 22 May 2008 06:18:20 -0700 (PDT)
Subject: problem boost::python::import
Message-ID: <d58d63a2-66f2-4c9e-8182-f17cfc67203e@d1g2000hsg.googlegroups.com>

Hello,

I tried this code with vs7-8 and boost1.34.1-1.35.0 and my python is a
2.4. The call to Cpython works well but boost::python doesn't work.
I've got an exception about an access violation reading location
0x00000000.

help, please?

thank you.
Fr?d?ric


#include "stdafx.h"
#include <boost/python.hpp>
#include <iostream>
#include <stdexcept>
#include <cassert>

using namespace boost::python;

int _tmain(int argc, _TCHAR* argv[])
{
	Py_Initialize();
	PyObject* pSys = PyImport_ImportModule("sys");  // works

	boost::python::object sys = boost::python::import("sys"); // doesnt
work

    return 0;
}


From castironpi at gmail.com  Tue May 13 11:29:44 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:29:44 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <8ca0c1c9-3c53-4c17-853a-d042066ca773@l64g2000hse.googlegroups.com>

On May 13, 10:24?am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.
>
> Perhaps. ?Flaming Thunder is only $19.95 per year for an individual
> (and even less per individual for site licenses), which is less than
> the cost of just one book on Python.
>
> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python -- so for many people the amount of
> time they save will be worth more than the cost of Flaming Thunder
> (unless, of course, their time is worth $0).
>
> Also, several users have rewritten their Python programs in Flaming
> Thunder, and found that Flaming Thunder was 5 to 10 times faster
> (Flaming Thunder compiles to native executables). ?So again, since
> many people value their time at more than $0, I think that many people
> will find that Flaming Thunder is worth $19.95 per year.
>
> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python. ?This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.
>
> Python has been around about 15 years, yet still has those
> awkwardnesses. ?Flaming Thunder has been out less than 6 months and
> those awkwardnesses are already getting fixed. ?The difference: I
> can't afford to ignore users.
>
> But the future is one of the hardest things to predict, so we'll see.
>
> On May 13, 8:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

What is about $0?


From paddy3118 at googlemail.com  Wed May 21 18:35:07 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 21 May 2008 15:35:07 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <7a3506f4-0e07-47bb-a22e-901624c1dc5b@j22g2000hsf.googlegroups.com>

On May 21, 10:38 am, boblat... at googlemail.com wrote:
> Hello,
>
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
>
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python. The other way is to open up an else:
> block in each level, do the assignment and then the test. This
> unneccessarily leads to deeper and deeper nesting levels which I find
> ugly. Just as ugly as first testing against the RE in the elif: clause
> and then, if it matches, to re-evaluate the RE to access the match
> groups.
>
> Thanks,
> robert

You could use named groups to search for all three patterns at once
like this:


original:

  prog1 = re.compile(r'pat1')
  prog2 = re.compile(r'pat2')
  prog3 = re.compile(r'pat3')
  ...

Becomes:

  prog = re.compile(r'(?P<p1>pat1)|(?P<p2>pat2)|(?P<p3>pat3)')
  match = prog.match(line)
  for p in 'p1 p2 p3'.split():
    if match.groupdict()[p]:
      do_something_for_prog(p)


- Paddy.



From deets at nospam.web.de  Mon May 26 08:25:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 14:25:16 +0200
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<g1clpb$1pu0$1@news.mtu.ru>
	<et3l3414bkub2f4ra3b67i8ljkumu36lll@4ax.com>
Message-ID: <69voiaF35hdm5U1@mid.uni-berlin.de>

> If you hate PHP, that's OK, but it doesn't make PHP a bad or even
> inferior language.

No. That is PHP on it's own that makes it an inferior language. It is suited
(and surprisingly well) for the task of creating webapps. But the language
core? Plain ugly. Examples include (in arbitrary order and not complete)

 - bolted-on Object-system 
 - lack of binary extension API 
 - ONE collection type to rule them all!!
 - stateful collection iteration (come *on*, calling reset on an array!)
 - no namespaces (according to
http://www.php.net/manual/en/language.namespaces.php they are planned -
good)
 - copy-by-value semantics with a crude reference-mechanism to mitigate that
 - inconsistent APIs all over (DB-connectivity for example). Yes, I know
about PEAR::DB. But somebody "designed" the real DB apis. Or actually
didn't. Which 
 - no concept of higher order functions - you pass around function-*names*.
Which of course works because of one flat namespace. Wonder how it will
work if NS get real

Oh, and one of my real favorits: NO SUB-EXPRESSIONS. You can't write

$foo = $array1[$key1][$key2][$key3]

I'm wondering how to write a language that *doesn't* allow for that...

And before you ask: yes, I've written PHP, more than enough and larger
systems in it with a few K-loc. I even encountered weird bugs (PHP 4.0.x,
has been a while) that made PHP forget function definitions! You could
re-load a page if a function was missing, and it magically appeared. and
you could *fix* this turning off some warn/log-level. Again - I don't even
*know* how to program something like a language that behaves that way. And
it certainly puts the language into the worst light imaginable. buggy
libraries and extensions? No deal, can happen. But core features like
that - should work.

having said all this - I see the benefits of PHP. It is easy to start for
non-programmers, you can get it for virtually no cost at all for
web-development tasks, you don't need to bother with stuff you have to deal
in python web-frameworks like setting up mod_wsgi, mod_python or mod_proxy.

But it is a hack. Don't pretend otherwise.      

Diez


From qwertymaniac at gmail.com  Sun May 25 16:26:01 2008
From: qwertymaniac at gmail.com (Qwerty Maniac)
Date: Mon, 26 May 2008 01:56:01 +0530
Subject: 22.800000 and a 1 on the end!!??
In-Reply-To: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
References: <e21b563a-d5a9-4273-a092-e69f65d41dd2@d1g2000hsg.googlegroups.com>
Message-ID: <977f7e7a0805251326v4f3d169co65cbe3c861e40f1@mail.gmail.com>

Like what others said, use the Decimal class to avoid this.

from decimal import Decimal
x=Decimal(5)
x/=2
x*=Decimal("11.4")
print x
# 28.50

On Mon, May 26, 2008 at 1:28 AM, <notnorwegian at yahoo.se> wrote:

> >>> x = 5
> >>> x /= 2
> >>> x
> 2
> >>> x *=11.4
> >>> x
> 22.800000000000001
>
> ok where does the 1 in the come from?
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Harsh J
www.harshj.com
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From inhahe at gmail.com  Tue May 20 17:19:10 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 20 May 2008 17:19:10 -0400
Subject: persistent deque
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
Message-ID: <aeHYj.12642$hv2.679@bignews5.bellsouth.net>

"castironpi" <castironpi at gmail.com> wrote in message 
news:29451c2a-cb0a-43a6-b140-6c16e3cb46ac at c65g2000hsa.googlegroups.com...
> I'd like a persistent deque, such that the instance operations all
> commit atomicly to file system.

ok, i made your persistent deque.  but there are two important notes 
regarding this module:  1) I am a genius.  2) it doesn't actually work for 
some reason.  i.e., loading an instance from file won't work.  i don't know 
why.  the pickle module is doing something i didn't expect.


from collections import deque
import os, pickle, random

class pdeque(deque):
  def __init__(self, filename, initial):
    deque.__init__(self, initial)
    self.filename = filename
    self.tempfilename = ''.join((random.choice("abcdefghijklmnopqrstuvwxyz") 
for x in xrange(10)))+".tmp"
    self.save()
  def save(self):
    pickle.dump(self, open(self.tempfilename,'wb'))
    try: os.remove(self.filename)
    except: pass
    os.rename(self.tempfilename, self.filename)
  @classmethod
  def load(cls, filename):
    return pickle.load(open(filename,'rb'))

for name in "append appendleft extend extendleft remove rotate".split():
  func = getattr(deque, name)
  def func2(instance, arg, func=func):
    result = func(instance, arg)
    instance.save()
    return result
  setattr(pdeque, name, func2)

for name in ("pop", "popleft", "clear"):
  func = getattr(deque, name)
  def func2(instance, func=func):
    result = func(instance)
    instance.save()
    return result
  setattr(pdeque, name, func2)


---

you use it just like a deque object except that when initializing the first 
parameter is a filename for it to store in.   to load the deque object again 
later, call .load(filename) on the pdeque class or a pdeque object (except 
that it doesn't work.)

i'm sure somebody here knows what obscure feature of pickling it is that's 
doing this counterintuitively.  (disclaimer: i've never used pickle to store 
a custom type before)





From roy at panix.com  Sat May 24 09:29:10 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:29:10 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>

In article <mailman.1525.1211632496.12834.python-list at python.org>,
 David <wizzardx at gmail.com> wrote:

> Hi list.
> 
> What strategies do you use to ensure correctness of new code?
> 
> Specifically, if you've just written 100 new lines of Python code, then:
> 
> 1) How do you test the new code?
> 2) How do you ensure that the code will work correctly in the future?

There's various philosophies about this (and none of them are specific to 
Python), but I like a process called Test Driven Development (TDD).

In TDD, you invert the order you describe above.  First write the test, 
then write the code to make the tests pass.  What I usually do is write the 
documentation first, then write some tests that assert things the 
documentation says, then write the code.

Python has several testing modules; unittest and doctest come with the 
system, and there's a couple of other third-party modules that have sprung 
up.  I find unittest works well for me and stick with that.

I work in small increments, writing one test at a time, then some code, 
then another test, then some more code, etc.  In fact, I take this to what 
many people might call an extreme.  When I sit down to write a class, the 
first test I write is one that just instantiates an instance of that class 
with no arguments.  Then a write the stub class:

class foo:
   pass

and see that the test works.  If I'm feeling really expansive, I'll write a 
more sophisticated version:

class foo:
   def __init__(self):
      pass

and use that to satisfy my initial test.  Then it's just later, rinse, 
repeat until the class is done, fully documented, and fully tested.

> For (1) I thoroughly (manually) test code as I write it, before
> checking in to version control.

I agree with the idea that it's fully tested before checking it in, but not 
with the manual testing.  In my mind, any test that's not fully automated 
might as well not exist.


From daveparker at flamingthunder.com  Mon May 12 20:54:21 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:54:21 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
Message-ID: <851ece67-4a3a-4d1c-925c-c9e3f5e081ba@b9g2000prh.googlegroups.com>

On May 12, 6:32?pm, castiro... at gmail.com wrote:
> Can you render some furniture for me... to try to see some human
> posture to lowest energy levels.

Not yet; Flaming Thunder doesn't have built-in graphics yet.  But
we're incorporating the graphics from www.dpgraph.com , so when that's
finished, then yes Flaming Thunder will be able to render furniture
and calculate energy levels.

If I remember correctly, I think that NASA did some experiments many
years ago on human posture and found that laying back (like the
astronauts do at takeoff) minimized stress on the human body due to
high g-forces.


From daveparker at flamingthunder.com  Tue May 13 09:25:27 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Tue, 13 May 2008 06:25:27 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<ebb2b3bd-5973-4ef4-a108-176374b2140f@a1g2000hsb.googlegroups.com>
Message-ID: <c25f4253-3123-40a2-a4bf-5daf67e2aab3@p39g2000prm.googlegroups.com>

On May 12, 11:52?pm, castiro... at gmail.com wrote:
> I do hold an argument that one can make too much money for one's own
> good quality of life.

As do I; I think there is an optimal amount.  Too little, and you
waste time gathering food.  Too much, and you waste time gathering
money.

> Am I trying to visualize thermal (and ergo
> possibly chemical too) gradients (thermovoltaic)? ?Yes in part.

Some of those DPGraph (and soon, Flaming Thunder) may be able to help
with.

> I'm pretty generally interested, but where can print layout take you?

Not far, especially with books disappearing.  Our library says that
these days, only 25% of their checkouts are books; the other 75% are
DVDs, CDs, etc.

> Microsales?

And getting microer every day.


From GMan67 at pduck.com  Wed May 28 11:03:32 2008
From: GMan67 at pduck.com (GeoffreyF67)
Date: Wed, 28 May 2008 08:03:32 -0700 (PDT)
Subject: Using PEFile to replace Images in PE EXE
Message-ID: <46f79833-5ecb-4d20-91dd-25f9d0fc4a14@y38g2000hsy.googlegroups.com>

I am trying to script some image changes for multiple EXE files in
linux.

The problem I'm running across is that I haven't been able to find
anything out there that can do this...until now.

It *looks* like pefile (available at google code) would do the trick.

Unfortunately I know absolutely nothing about python.

Any ideas/hints/tips appreciated.

Thanks,

G-Man


From mankoff at gmail.com  Sat May 17 21:37:26 2008
From: mankoff at gmail.com (mankoff)
Date: Sat, 17 May 2008 18:37:26 -0700 (PDT)
Subject: Malloc error
References: <d662bbb6-da1e-4eff-8f1c-2addd1a3ff45@m45g2000hsb.googlegroups.com>
	<mailman.1264.1210987033.12834.python-list@python.org>
Message-ID: <7624f523-ff31-439b-9424-2442d6198404@x35g2000hsb.googlegroups.com>

On May 16, 9:16?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 16 May 2008 16:08:41 -0300, mankoff <mank... at gmail.com> escribi?:
>
> > I'm brand spanking new to Python. Never coded in it, but I'm
> > comfortable coding in general in other languages.
>
> Welcome...!
>
> > I'm Trying to get
> > some legacy code to run on a newer machine. I don't have access to the
> > legacy box for debugging.
>
> > I'm getting the following error:
>
> > Python(36979) malloc: *** error for object 0x88374: Non-aligned
> > pointer being freed
> > *** set a breakpoint in malloc_error_break to debug
>
> Ouch. I'd like to think that the error doesn't come from Python itself but ?
> ?from some compiled C extension. Are you using any?
> I'd try with the same Python version the legacy box had, if it was older ?
> than 2.5.2
>
> --
> Gabriel Genellina

You're right. I was using some C extensions. The bug was there. I've
fixed it and everything appears to be working.

Thanks,

   -k.


From fetchinson at googlemail.com  Sun May 18 19:18:36 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Sun, 18 May 2008 16:18:36 -0700
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <fbe2e2100805181618i5fc4d1b4n9e458951f8910cac@mail.gmail.com>

> Hey all. Just thought I'd ask a general question for my own interest. Every
> time I think of something I might do in Python, it usually involves creating
> a GUI interface, so I was wondering what kind of work you all do with Python
> that does *not* involve any GUI work. This could be any little scripts you
> write for your own benefit, or what you do at work, if you feel like talking
> about that! :)

web apps
manage/format/write cv
convert jpg to gif
start/stop/manage parallel runs on a PC cluster
etc :)

Actually, I've never written anything with a GUI (unless you count web apps).

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From wuwei23 at gmail.com  Wed May 21 06:08:40 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 03:08:40 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com>
Message-ID: <10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com>

On May 21, 8:04 pm, alex23 <wuwe... at gmail.com> wrote:
> Is your Spider class a subclass of HTMLParser? Is it over-riding
> __init__? If so, is it doing something like:
>
>     super(Spider, self).__init__()
>
> If this is your issue[...]

I'm sorry, this really wasn't clear at all. What I meant was that you
need to call the HTMLParser.__init__ inside your Spider.__init__ in
order to have it initialise properly. Failing to do so would lead to
the .rawdata attribute not being defined. The super() function is the
best way to achieve this.

Sorry for the rambling, hopefully some of that is relevant.

- alex23


From wuwei23 at gmail.com  Wed May 21 02:02:22 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 20 May 2008 23:02:22 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
Message-ID: <c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com>

On May 21, 8:53 am, Xah Lee <x... at xahlee.org> wrote:
> The complaint about python doc has turned up
> now and then in the past few years it seems, but always got put down
> by python priests

No, what was generally rejected was the idea that *you* could bring
more clarity to the documentation, based on the complete absence of it
in your posts & "essays". Basically, noone wanted docs that would
randomly degenerate into ad hominem accusations of elitism aimed at
the module authors.

Nothing is stopping you from making doc changes and submitting them
for review now, unless grandstanding is your actual intent.


From nick at craig-wood.com  Thu May 22 16:30:07 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 22 May 2008 15:30:07 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<slrng3b3mc.iqd.nick@irishsea.home.craig-wood.com>
	<ce857187-7ac5-404a-ad38-42e11e0fe810@k30g2000hse.googlegroups.com>
	<g14f5u$ioe$1@aioe.org>
Message-ID: <slrng3bk4g.mk4.nick@irishsea.home.craig-wood.com>

Mel <mwilson at the-wire.com> wrote:
>  Mensanator wrote:
> > On May 22, 10:30??am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> >> Dave Parker <davepar... at flamingthunder.com> wrote:
> >> > But after getting input from children and teachers, etc, it started
> >> > feeling right.
> >>
> >> > For example, consider the two statements:
> >>
> >> > x = 8
> >> > x = 10
> >>
> >> > The reaction from most math teachers (and kids) was "one of those is
> >> > wrong because x can't equal 2 different things at the same time".
> >>
> >> This is a common feature in functional languages...
> >>
> >> Eg
> >>
> >> Erlang (BEAM) emulator version 5.6.2 [source] [smp:2]
> >> [async-threads:0] [kernel-poll:false]
> >>
> >> Eshell V5.6.2 ??(abort with ^G)
> >> 1> X = 8.
> >> 8
> >> 2> X = 10.
> >> ** exception error: no match of right hand side value 10
> >> 3>
> >>
> >> That error message is the erlang interpreter saying "Hey I know X is
> >> 8, and you've said it is 10 - that can't be right", which is pretty
> >> much what math teachers say too...
> > 
> > Are you saying that erlang treats 1> as an assignment, yet
> > treats 2> as a comparison?
> > 
> > That's inconsistent. No wonder nobody uses erlang.
> 
>  In Prolog terms, they're both unification.  If X has never been defined you
>  can define it as 8 with no chance of contradicting anything.  Once X is 8,
>  the proposition "X is 10" is false.
> 
>  I act as though Erlang thinks the same. My Erlang chops aren't as good as my
>  Prolog chops were.

I had to look up the definition of unification, but yes you are right,
erlang and prolog seem mean roughly the same thing by the = sign.  It
is called the pattern matching operator in erlang.

>From Armstrong's book: The expression Pattern = Expression causes
Expression to be evaluated and the result matched against Pattern. The
match either succeeds or fails. If the match succeeds any variables
occurring in Pattern become bound.

It is a very powerful idea and one which (along with the concurrency
and message passing from Erlang) has been implemented for python :-

  http://candygram.sourceforge.net/

I've been reading the Erlang book and I have to say it has given me a
lot of insight into python...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 08:01:45 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 14:01:45 +0200
Subject: Why does python not have a mechanism for data hiding?
In-Reply-To: <09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
Message-ID: <483aa6ac$0$3492$426a74cc@news.free.fr>

Joe P. Cool a ?crit :
> On 24 Mai, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> Sh4wn <luckyluk... at gmail.com> writes:
>>> first, python is one of my fav languages, and i'll definitely keep
>>> developing with it. But, there's 1 one thing what I -really- miss:
>>> data hiding. I know member vars are private when you prefix them with
>>> 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
>>> before it.
>> From whom are you trying to hide your attributes?
> 
> I saw this "don't need it" pattern in discussions about the ternary
> "if..else" expression and about "except/finally on the same block
> level".
> Now Python has both. Actually it is very useful to be able to
> distinguish
> between inside and outside.

Doing it the Python way makes the distinction pretty obvious : 
implementation stuff names all start with an underscore. You just can 
not miss it.

> This is obvious for real world things e.g.
> your
> TV. Nobody likes to open the rear cover to switch the channel.

Nope, but when the switch is broken and the TV not under warranty no 
more, I'm glad I can still open the rear cover and hack something by 
myself, despite usual (and hard to miss) "no user serviceable parts 
inside" and "warranty void if unsealed" warning stickers.


> Similar
> arguments apply to software objects. "data hiding" is a harsh name, I
> would
> call it "telling what matters".

Which is exactly what we do using naming convention.

>> In Python, the philosophy "we're all consenting adults here" applies.
> 
> Please don't sell a missing feature as a philosophy. Say you don't
> need/want
> it. But don't call it philosophy.

Please understand that not having access restriction is a design choice, 
not a technical inability (and FWIW the rationale behind that design 
choice has been debated to hell and back). So yes, it's is actually a 
'philosophic' problem.

>> You shouldn't pretend to know, at the time you write it, all the uses
>> to which your code will be put.
> 
> It's *your* *decision* which uses will be available. Your explanation
> appears
> to me as a fear to decide.

Nope, just a matter of experience.

>> If you want the users of your code to know that an attribute should
>> not be used as a public API for the code, use the convention of naming
>> the attribute with a single leading underscore.
> 
> Littering your class definition with dozens of underscores is exactly
> the
> line noise we love to criticize in Perl.

At least it makes what's 'inside' and what's 'outside' very obvious, 
isn't it ?

>>> Python advertises himself as a full OOP language, but why does it
>>> miss one of the basic principles of OOP?
>> Who taught you that enforced restrictions on attribute access was a
>> "basic principle" of OO?
> 
> Nearly every introduction to OOP?

Nearly every introduction to OOP is crap. Nearly every introduction to 
OOP also introduces classes and inheritance as "basic principle" of OO. 
Almost none introduction to OOP actually talk about *objects* - instead, 
they introduce mostly what Stroustrup and Gostling understood of OOP.

> Please don't tell me that
> encapsulation
> does not mean "enforced restriction".

What about : "encapsulation does not mean *language enforced* 
restriction" then ?

To me, encapsulation means that - as a client - you do not *need* to 
care about implementation details, not that you can not get at it. And 
while data hiding is indeed a possible mean to enforce some kind of 
encapsulation, it's not quite the same thing.



From cwitts at gmail.com  Wed May 28 05:25:52 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 02:25:52 -0700 (PDT)
Subject: Does this path exist?
References: <2c6739d1-1128-469c-92b0-ee0263ec25d1@m36g2000hse.googlegroups.com>
	<mailman.1677.1211964515.12834.python-list@python.org>
	<3d9fdd77-8187-49f5-aaa2-de7d2363038c@x41g2000hsb.googlegroups.com>
Message-ID: <ee91c351-ca4b-43da-804c-3c91c6264ec0@a1g2000hsb.googlegroups.com>

On May 28, 10:59?am, s0s... at gmail.com wrote:
> On May 28, 3:47 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
>
>
>
> > s0s... at gmail.com wrote:
> > > I wanted to ask for ways to test whether a path exists. I usually use
> > > os.path.exists(), which does a stat call on the path and returns True
> > > if it succeeds, or False if it fails (catches os.error). But stat
> > > calls don't fail only when a path doesn't exist. I see that, at least
> > > on Windows, the instance of the exception has an attribute 'errno' set
> > > to 2 when it fails because the path doesn't exist. Is it a portable
> > > solution to rely on this (haven't tried it on Linux)? Are there other
> > > ways of testing whether a path exists?
>
> > > Thanks,
> > > Sebastian
>
> > "import errno" and see if the exception's errno attribute is set to
> > errno.ENOENT (which is, yes, 2). It is portable.
>
> > If you Google [ENOENT Windows] or whatever, there are some differences
> > on different platforms, but not many.
>
> Thanks. So if OSError().errno == errno.ENOENT, then it means the path
> doesn't exist? (What does "ENOENT" stan for?)

http://books.google.co.za/books?id=MvoetCEgMRMC&pg=PA398&lpg=PA398&dq=enoent+meaning&source=web&ots=31Ik2wY4NZ&sig=NUvvA1LTMDG0x4XK0x7142FEeNI&hl=en

ENOENT - Invalid Entry (file or directory)


From bruno.desthuilliers at gmail.com  Mon May 19 16:25:20 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 19 May 2008 13:25:20 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<48314dd0$0$32138$426a34cc@news.free.fr>
	<hifYj.43082$4B6.9014@newsfe14.ams2>
Message-ID: <4d44955c-4eee-42bd-ae7f-a3cf511869c2@27g2000hsf.googlegroups.com>

On 19 mai, 15:30, Roel Schroeven <rschroev_nospam... at fastmail.fm>
wrote:
> Bruno Desthuilliers schreef:
>
> > 1/ being interpreted or compiled (for whatever definition of these
> > terms) is not a property of a language, but a property of an
> > implementation of a language.
>
> > 2/ actually, all known Python implementations compile to byte-code.
>
> You keep saying that, and in theory you're right.

"In theory" ??? Heck, both points above are mere facts. Well, I may
accept that the 2nd one is a bit overgeneralized, since IIRC there's
an experimental Python to javascript "compiler" in Pypy, but...

>  But I'm still inclined to disagree with it,  since the practical reality is different.

Do you mean that how source code written in a language (that is : a
grammar  + a syntax) finally become a set of instructions executed by
a CPU depends on the language (I repeat : a grammer + a syntax), and
not on a piece of software turning the source code into something that
can actually be executed by the CPU ? Or that there exists  a (working
and usable) implementation of the Python language that does not use an
intermediate byte-code compilation ? If the latest, I'd happly
recognize my error if proven wrong. But on the first point, I'm afraid
that, well, a fact is a fact is a fact.

> Python is
> indeed compiled to byte code, but if you compare that byte code with
> assembly code you'll see that there's a whole world of difference
> between the two,

Obviously, yes - at least for all assembly language I've seen so far.
But whoever said otherwise ?

>  largely because of the dynamical nature of Python. Fact
> is that Python was designed from the start to run on a virtual machine,
> not on the native hardware.

Nope. The facts are that
1/ Python (the language) has *not* been designed with ease of
implementation of an optimizing native-code compiler in mind,  and
2/ CPython (the first and reference implementation) has been designed
to use a byte-code + VM scheme

> C OTOH was designed to be compiled to assembly code (or directly to
> machine code)

Note quite. C has been designed to make it as easy as possible to
write either a C to assembly or C to native binary code compiler.

> and as a result there are no (or virtually) no
> implementations that interpret C or compile it to bytecode.

There's at least one (possibly incomplete) C interpreter. FWIW, it
would not be harder (and possibly simpler) to write a byte-code+VM
based C implementation than it is to write CPython, Jython or
IronPython. The point is that it's just useless - C is a (very) low-
level language, and the only reason to use C is that you'll find a
pretty good optimizing native-code compiler on almost any platform -
sometimes even before the CPU physically exists.

> I love Python, but IMHO it's a bit silly to maintain that the fact that
> Python compiles to byte code instead of assembly code/machine code is
> purely a matter of implementation; on the contrary, I believe it's a
> result of its design.

There's a very naive belief we saw every here and then here, which is
that "Python would be faster if it was compiled to native code". The
point is that, given Python's (as a language) extrem dynamism,
compiling it to native code wouldn't buy you much in terms of raw
performances. The problem is not with writing a native-code
compiler[1}, but with writing an *optimising* native-code compiler.
FWIW, even Java with it's brain-dead static type-system gained more
from JIT compilation in the VM than from being directly compiled to
native code.

[1]  not that I would personnaly be able to do so in a reasonable
amount of time, but given how many talented programmers have been and
are still working on making as fast as possible Python implementions,
it seems obvious that such a thing would already exists if there was
any point working on it.

> I also think that there's a large difference
> between byte code and machine code

No ? Really ? Now *this* is a scoop, you know ? <g>

> (in Python's case; I haven't looked
> at other languages), and that it's a bit silly to try to trivialize that
> difference.

I'm not trying to "trivialize" anything. I'm just getting fed up with
this "Python is an interpreted and therefore slow language" non-
sense.  Python is a language, and as such is neither slow nor fast nor
interpreted nor compiled nor <insert any implementation related stuff
here>. And while CPython is not blazingly fast for computation-heavy
stuff, it's not because it is "interpreted" - which it is not for a
strict definition of "interpreted", but anyway...  - but because
*optimizing* execution of an highly dynamic language is nothing,
well,  err, trivial.



From gagsl-py2 at yahoo.com.ar  Sat May 24 20:11:52 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 21:11:52 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
Message-ID: <op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 21 May 2008 07:44:50 -0300, Casey McGinty <casey.mcginty at gmail.com> escribi?:

Just my own opinion on these things:

> 1. Script code should be as basic as possible, ideally a module import line
> and function or method call. This is so you don't have to worry about script
> errors and/or increase startup time because a *.pyc file can not be store in
> /usr/bin.

Scripts are not compiled by default, only imported modules (anyway you could compile scripts by hand). Keeping the main script short might reduce the startup time, yes.

> 2. In the top of your package directory it is typical to have a module name
> '_package.py'. This is ideally where the main command line entry point for
> the package code should be placed.

Why the underscore? And I usually don't put executable scripts inside a package - I consider them just libraries, to be imported by other parts of the application.
It's easier to test too when your tests *and* the application code are external to the package itself.

> 3. In the _package.py file you should add a "class Package" that holds most
> or all of the application startup/execution code not designated to other
> modules. Then run the application with the call to "Package()", as in
>
>     if __name__ == '__main__':
>        Package()

In Python that doesn't *have* to be a class, and in fact, most of the time I use a function instead. Something like this:

def main(argv):
     # do things

if __name__ == '__main__':
     import sys
     sys.exit(int(main(sys.argv) or 0))

> Some other questions I have are:
> A. What should go in the package __init__.py file? For example, a doc
> describing the program usage seems helpful, but maybe it should have info
> about your modules only? Assuming the __init__.py code gets executed when
> you import the module, you could place part or all of the application code
> here as well. I'm guessing this is not a good idea, but not really
> convinced.

Yes, the __init__.py is executed when you import the package. And no, I don't think it's a good idea to put all the application code there. As I said above, I consider packages *libraries*, the application code should *import* and use them, but not reside *inside* a package.
And there is the "import lock" issue too - I'm unsure of this but I think a lock is held until the import operation finishes, and that would happen only after __init__.py is fully executed.

> B. How should you import your _package.py module into your /usr/bin script.
> Is there a way to use an '__all__' to simplify this? Again this goes back to
> question A, should there be any code added to __init__.py?

I don't get the question... you import it as any other module (but I would not use a _package.py file anyway)

> C. If you have a _package.py file as the application entry, is it worth it
> to place most of the application code in a class, described in part 3?

As I said, I'd use a function, at least at the top level. Of course it can create many other objects.

> D. When I import a package._package module, I get a lot of junk in my
> namespace. I thought an '__all__' define in the module would prevent this,
> but it does not seem to work.

`import package._package` should only add "package" to the current namespace. If you're using `from package import *` - well, just don't do that :)
Otherwise I don't understand what you mean.

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Sun May 25 06:14:41 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 10:14:41 +0000 (UTC)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
Message-ID: <g1be6h$1guc$1@news.mtu.ru>

Robbie wrote:
> I can't seem to figure out where to put this file so that Python will
> recognize it when I start it up.

You need to put this file in your site-packages directory.
To get the location of your site-packages directory, type in Python 
interactive shell:

from distutils.sysconfig import get_python_lib
print get_python_lib()

-- Ivan




From skanemupp at yahoo.se  Thu May 15 08:27:10 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 05:27:10 -0700 (PDT)
Subject: datamining .txt-files, library?
Message-ID: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>

i have a big collection of .txt files that i want to open and parse to
extract information.

is there a library for this or maybe even built in?


From castironpi at gmail.com  Sun May  4 17:03:41 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Sun, 4 May 2008 14:03:41 -0700 (PDT)
Subject: Light slices + COW
References: <fa561953-f330-4249-88f5-ef7df2e6e1a8@x35g2000hsb.googlegroups.com>
	<mailman.511.1209874689.12834.python-list@python.org>
	<53fa8195-ae1c-42c0-8a56-d9ffce39b5f0@r66g2000hsg.googlegroups.com>
	<mailman.528.1209905380.12834.python-list@python.org>
Message-ID: <f955c3d6-2b7e-48f2-8528-a95a1b34ea6c@2g2000hsn.googlegroups.com>

On May 4, 7:49?am, David <wizza... at gmail.com> wrote:
> > ?> D compiles to efficient machine code so Python is at a disadvantage
> > ?> even if you use the same syntax (see my first example). You can make
> > ?> the Python version faster, but beware of premature optimization.
>
> > ?This time I don't agree with this "premature optimization" thing. My
> > ?original Python version is just 5 lines long, it's readable enough,
> > ?and it's a part of a large library of mine of similar functions, they
> > ?must be fast because I use them all the time as building blocks in
> > ?programs.
>
> Have you looked into the 'numpy' libraries? Those have highly
> optimized array/numeric processing functions. Also the have a concept
> of getting 'views' when you slice, rather than a full copy.
>
> I also suggest benchmarking your apps which use your libs and see
> where the bottlenecks are. Then you can move those to external
> compiled modules (c/pyrex/cython/shedskin/etc). You can keep your
> slower Python version around as a reference implementation.
>
> > ?> What I'dlike to see is a rope[1] module for Python.
>
> > ?People have already suggested it, and there's even an implementation
> > ?to replace Python strings. It was refused because... I don't know why,
> > ?maybe its implementation was too much more complex than the current
> > ?one, and it wasn't faster in all situations (and I think Guido wants
> > ?data structures that try to replace the basic built-in ones to be
> > ?faster in all situations and user-transparent too).
>
> I'd be happy if there was a separate 'rope' class that you could wrap
> arbitrary long sequences in when you need to (the same way that STL
> has it separate to the string class, even though the string class has
> a lot of other optimizations (internal ref counts, etc, to avoid
> unnecessary copies)). Do you know one?
>
> David.

Persistence on the rope class might be trivial; that is, a constant
number of disk modifications be made per state modification.


From johnjsal at NOSPAMgmail.com  Sat May 10 22:19:54 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 11 May 2008 02:19:54 GMT
Subject: Is using range() in for loops really Pythonic?
Message-ID: <482657ca$0$25026$607ed4bc@cv.net>

I know it's popular and very handy, but I'm curious if there are purists
out there who think that using something like:

for x in range(10):
    #do something 10 times

is unPythonic. The reason I ask is because the structure of the for loop
seems to be for iterating through a sequence. It seems somewhat
artificial to use the for loop to do something a certain number of
times, like above.

Anyone out there refuse to use it this way, or is it just impossible to
avoid?


From loorthu at yahoo.com  Mon May 19 20:08:53 2008
From: loorthu at yahoo.com (loorthu)
Date: Mon, 19 May 2008 17:08:53 -0700 (PDT)
Subject: killing children spawned by pexpect
Message-ID: <3129645d-e6cb-4ed7-82ca-2995bccbc5b7@v26g2000prm.googlegroups.com>

I am noticing that pexpect kills any child that it is spawned when the
parent is terminated using SIGINT (e.g Ctrl-C on the shell), but not
when it is killed by SIGKILL (e.g 'kill -9' on the parent process).
Here is a quick demo (tried on Linux 2.6.9 kernel):

#!/usr/local/bin/python


import pexpect, re


cmd = ?<any  time consuming shell command here>?


child = pexpect.spawn(cmd)

cpl = child.compile_pattern_list([pexpect.EOF, re.compile("(.*?)\r
\n")])

while True:

    r = child.expect_list(cpl)

    if r == 0: break

    line = child.match.group(1)

    print line

child.close()

print 'Exit ',  child.exitstatus



Now, if I kill the python process using Ctrl-C (SIGINT), it kills the
child process spawned as well. But if it is killed by SIGKILL (by
doing a ?kill -9?), the parent python exits, but the child goes on?
What is the best way to ensure that all children are killed when the
parent who spawned them terminates?



Thanks,

Cottalango



From cmpython at gmail.com  Mon May 12 18:30:15 2008
From: cmpython at gmail.com (CM)
Date: Mon, 12 May 2008 15:30:15 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <42b97720-4c9f-4060-8b28-f9cb33737f3e@m36g2000hse.googlegroups.com>

On May 12, 1:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> Just something that crosses my mind every time I delve into "Learning
> Python" each night. Does anyone see any value in learning Python when you
> don't need to for school, work, or any other reason? I mean, sure, there's
> value in learning anything at any time, but for something like a programming
> language, I can't help but feel that I will be mostly unable to use what I
> learn simply because I have no reason to use it.
>
> The *process* of learning is enough fun for me, and every now and then I do
> find a small use for Python that really pays off, but for the most part I'm
> wondering what people's thoughts are as far as simply learning it for the
> sake of learning. Does it seem like a silly endeavor to most people? Did
> anyone here learn a programming language when you didn't need to? If so, how
> much and in what capacity did you use it after you learned it?
>
> Hopefully this question even makes sense!

I think learning something only for the sake of learning is valid only
if it is really fun for you to learn that topic.  That is, it is a
hobby that brings you enjoyment.  If it is like pulling teeth and you
know you are barely ever going to use it, of course stop trying to
learn Python.  Life is too short.  Go outside.

But I think there is a huge difference between learning Python if you
know nothing about computer programming and if you already know
another language (or more).  I'd say in the first case, don't put
yourself through the trouble of learning a computer language if you
know you don't like it or won't use it--it's after all just an
arbitrary language for talking to a machine.  But if you are already
programming in another language, learning Python is probably
recommendable from the point of view of career or just understanding
programming better.

Most importantly, rarely are any cases so clear-cut as I've described
them.  Usually something is partially fun, partially a pain, partially
useful, etc.  So, it's your call.


From matt.trevor at gmail.com  Thu May 22 20:50:01 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:50:01 -0700 (PDT)
Subject: serach file for regexp, return if found?
References: <348e4ed3-201c-43b6-ae27-0b921861a461@m36g2000hse.googlegroups.com>
Message-ID: <2f9ed611-fbbc-49cb-82ed-8b09ab01bb75@t12g2000prg.googlegroups.com>

On May 23, 9:10 am, notnorweg... at yahoo.se wrote:
> but search and match only returns matchobjects(what are those anyway?
> i dont get what to do with them, do they contain true/false,
> stringposition etc?)

It's all covered in the docs:

http://docs.python.org/lib/module-re.html
http://docs.python.org/lib/match-objects.html


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 03:39:17 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 09:39:17 +0200
Subject: anonymous assignment
In-Reply-To: <3T7Wj.134606$rd2.31796@pd7urf3no>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
	<68q50pF2u2t25U2@mid.uni-berlin.de>
	<3T7Wj.134606$rd2.31796@pd7urf3no>
Message-ID: <482945a5$0$694$426a34cc@news.free.fr>

Yves Dorfsman a ?crit :
> Marc 'BlackJack' Rintsch wrote:
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing.

I'm afraid you just don't understand what Python's "variable" are. 
You're really worrying about a non-issue here. Seriously.

>>> I
>>> find this unsatisfactory...
>>
>> Get over it?
> 
> Than what's the point of wanting a better language if every time we run 
> in something that looks wrong, or something that could be done better we 
> should  just "get over it" ?
> 

No language can be everything to everyone and still retain any kind of 
consistency. And the Python's team really try to keep a good balance 
between features and consistency (and so far mostly succeed IHMO).

Now, of course, suggesting features or potential improvements *is* a 
good idea (and FWIW there's an official way to do so : PEPs). But this 
doesn't mean that each an any such proposition is a good idea by itself, 
nor that it makes any sense wrt/ Python's design, nor that it's worth 
implementing it.



From aspersieman at gmail.com  Tue May 13 06:15:55 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Tue, 13 May 2008 12:15:55 +0200
Subject: Running compiled windows service python script
Message-ID: <48296A5B.4080008@gmail.com>

Hi All

I have a windows service (attached file). I basically just calls another 
script every 60 seconds. I can install, start and stop this service as 
expected with:
    ParseMailboxService.py install | start | stop

The problem is: if I create an exe of this script (all required modules 
are included in the exe) with gui2exe (a frontend to py2exe) I can 
install the service - but not start it. The error it returns is "Error 
starting service: The service did not respond to the start or control 
request in a timely fashion."

Is there something I need to additionally include in the compiled exe? I 
have manually included the following modules:
    * servicemanager
    * win32con
    * win32evtlogutil
    * win32serviceutil

I would greatly appreciate any help.

Regards

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 


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From alperkanat at gmail.com  Mon May 19 18:02:21 2008
From: alperkanat at gmail.com (T-u-N-i-X)
Date: Mon, 19 May 2008 15:02:21 -0700 (PDT)
Subject: Serious Problem with Timezone
Message-ID: <95b65707-35d1-4ce7-9138-b89c44d8084a@w7g2000hsa.googlegroups.com>

Hey There,

I'm a django developer and working on a project right now.. Last week
I just discovered a new problem in Python.. Here's what I do..

[01:00] (tunix at penguix ~)$ date
Sal May 20 01:00:10 EEST 2008
[01:00] (tunix at penguix ~)$ python
Python 2.5.2 (r252:60911, Feb 23 2008, 21:20:32)
[GCC 4.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from datetime import datetime
>>> datetime.now()
datetime.datetime(2008, 5, 20, 1, 0, 21, 131804)
>>> import os
>>> os.environ["TZ"] = "Europe/Istanbul"
>>> datetime.now()
datetime.datetime(2008, 5, 19, 22, 0, 38, 578438)
>>>

It's 01:00 in Istanbul now and Python shows 22:00 on 19th of May if I
set the TZ environment variable.. Django sets that variable
automatically so I'm having problems with scheduled posts..

I controlled my system's BIOS time.. It was wrong before, so I just
corrected it.. I set the time to UTC on Linux.. What else can I do ?


From deets at nospam.web.de  Fri May  2 12:13:57 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 18:13:57 +0200
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
Message-ID: <680su7F2q6qo2U1@mid.uni-berlin.de>

globalrev schrieb:
> if pygame.key.get_pressed[K_a]:
>             print "Muppet"
> 
> K_a is not defined.
> 
> 
> but yes it is. why do i get this error?

No it isn't - otherwise you wouldn't get this error, wouldn't you?

What IS defined is

pygame.K_a

Or if you do

from pygame import K_a

then K_a is defined as well.

Diez


From aahz at pythoncraft.com  Tue May 20 17:14:38 2008
From: aahz at pythoncraft.com (Aahz)
Date: 20 May 2008 14:14:38 -0700
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca> <g0uk74$7a4$1@solaris.cc.vt.edu>
Message-ID: <g0vevu$4ss$1@panix3.panix.com>

In article <g0uk74$7a4$1 at solaris.cc.vt.edu>, brad  <byte8bits at gmail.com> wrote:
>
>Run time is not important until you are asked to scale to millions
>or billions of users or computations or large data sets. I've seen
>this first hand. Getting results back the same day or sooner may be
>important. In cases such as this, I use C or C++... nothing else will
>do. Nothing else is as fast. Although I always keep a py version around
>for testing and for smaller tasks. Don't get me wrong, I love Python,
>but there are times when nothing, but pure, hard speed will do.

YouTube?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From python at bdurham.com  Tue May 20 12:33:47 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 20 May 2008 12:33:47 -0400
Subject: Removing Space and "-" from a string
Message-ID: <1211301227.17857.1254174051@webmail.messagingengine.com>

Shakir,

> I have thousands of records in MS Access database table, which records I
> am fetching using python script. One of the columns having string like
> '8 58-2155-58'
>
> Desired output: '858215558'
>
> I want to remove any spaces between string and any dashes between
> strings. I could do it in access manually but want to do from python
> script

Try this:

>>> input = '8 58-2155-58'
>>> output = ''.join( [ c for c in input if c not in ' -' ] )
>>> output
'858215558'

Malcolm


From duncan.booth at invalid.invalid  Fri May  9 12:59:58 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 16:59:58 GMT
Subject: Feature suggestion: sum() ought to use a compensated
	summationalgorithm
References: <fvmdg1$1e4p$1@toralf.uib.no>
	<mailman.809.1210281025.12834.python-list@python.org>
Message-ID: <Xns9A98E2877C40Cduncanbooth@127.0.0.1>

"Terry Reedy" <tjreedy at udel.edu> wrote:

> 
> "Szabolcs Horv?t" <szhorvat at gmail.com> wrote in message 
> news:fvmdg1$1e4p$1 at toralf.uib.no...
>| Gabriel Genellina wrote:
>| >
>| > Python doesn't require __add__ to be associative, so this should
>| > not be 
> used as a general sum replacement.
>|
>| It does not _require_ this, but using an __add__ that is not
>| commutative and associative, or has side effects, would qualify as a
>| serious misuse, 
> 
> seq + seq is not commutative ;-) 
> 
And three days ago Szabolcs already posted a followup to that 
comment saying: "Sorry, I meant associative only, not commutative.".


From v.niekerk at hccnet.nl  Wed May 28 13:56:55 2008
From: v.niekerk at hccnet.nl (huub)
Date: Wed, 28 May 2008 19:56:55 +0200
Subject: while-loop?
Message-ID: <483d9ce7$0$3125$e4fe514c@dreader18.news.xs4all.nl>

Hi,

Being a newbie with Python, I'm trying a short program with this:

 > <..>
> t = RoboInterface()
 > <..>
> while not t.Digital(1): # while endpoint is not reached
>  15         pass

However, it always hangs on the 'while', which I can't find in the 
tutorial at http://www.python.org/doc/. Assuming 'while' should work, 
what's wrong with the code?

Thanks.


From sjmachin at lexicon.net  Wed May 21 07:56:56 2008
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 21 May 2008 11:56:56 GMT
Subject: Struct usage and varying sizes of h, l, etc
In-Reply-To: <mailman.1406.1211324391.12834.python-list@python.org>
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <48340df7$1@news.mel.dft.com.au>

Robert Kern wrote:
> Ethan Furman wrote:
>> Greetings,
>>
>> I'm looking at the struct module for binary packing of ints and 
>> floats.  The documentation refers to C datatypes.  It's been many 
>> years since I looked at C, but I seem to remember that the data type 
>> sizes were not fixed -- for example, an int might be two byes on one 
>> machine, and four bytes on the next.  Can any C programmers verify 
>> this?  If it is true, does that mean that struct.pack('h', 8001) might 
>> give me different results depending on the machine it's running on?
> 
> Right. I believe (but could be wrong) that "char" is defined to be one 
> byte, but that "short", "int", "long", and "long long" are defined as 
> "at least as big as the previous type".
> 
> In practice, though, on nearly every machine that Python runs on, "char" 
> is one byte, "short" is two bytes, and "int" is four bytes. "longs" and 
> "long longs" tend to vary substantially, though; never assume sizes for 
> them.
> 
> Single-precision floats are always four bytes and double-precision 
> floats are always eight bytes. "long doubles" vary; they could be twelve 
> bytes or sixteen.
> 
> If you want to deal with fixed sizes, use struct.calcsize() to test the 
> sizes of each of the integer types, assign them to width-specific 
> aliases, and always use these aliases.
> 

This is all true if you want to operate in "native" mode; however in 
"standard" mode the sizes are fixed -- otherwise there'd be no easy way 
of reading/writing the fixed-size fields in many common file formats.

As the manual says:
"""
Native size and alignment are determined using the C compiler's sizeof 
expression. This is always combined with native byte order.

Standard size and alignment are as follows: no alignment is required for 
any type (so you have to use pad bytes); short is 2 bytes; int and long 
are 4 bytes; long long (__int64 on Windows) is 8 bytes; float and double 
are 32-bit and 64-bit IEEE floating point numbers, respectively.
"""

If, as I suspect, Ethan's purpose is be able to read/write files in a 
long-established PC file format, he will need to '<' for littleendian 
order, and an appropriate selection from bBhHiI and d will do what he needs.

HTH,
John


From gagsl-py2 at yahoo.com.ar  Tue May 13 04:29:24 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 05:29:24 -0300
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no> <87d4ns6nq5.fsf@benfinney.id.au>
	<CO7Wj.264439$pM4.238124@pd7urf1no>
Message-ID: <op.ua227ao8x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 00:21:06 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> Ben Finney wrote:
>
>>>>    y, _, d, _, _, _, _, _, _ = time.localtime()
>>> But you still have have a variable that's using memory for nothing.
>>  No, you have one extra unused name binding. The values that you don't
>> want to use have *already* been allocated by the time the above
>> statement is executed. Name binding doesn't copy the values, it merely
>> binds a name to them. There's no "variable" in the above statement.
>>
>
> But if this happens in the main part of your script, it could take a  
> long time before this binding disapear, therefore, the gc won't be able  
> to clean that one up. In this particular case, it doesn't really matter  
> (small size), but imagine in a case where we are talking of a list of  
> list, with potentially large element in the list.

If you have some reasons to believe it's worth to release that last  
reference as soon as possible, just do it. `del _` is all you need.
(I may have used `del` to remove a local name no more than once a year...)

-- 
Gabriel Genellina



From g.d.owen at shaw.ca  Mon May 12 17:03:37 2008
From: g.d.owen at shaw.ca (Gareth Owen)
Date: Mon, 12 May 2008 15:03:37 -0600
Subject: Python-list Digest, Vol 56, Issue 204
In-Reply-To: <mailman.15010.1210625706.12833.python-list@python.org>
References: <mailman.15010.1210625706.12833.python-list@python.org>
Message-ID: <200805121503.40844.g.d.owen@shaw.ca>

On Monday 12 May 2008 14:55:06 python-list-request at python.org wrote:
> Send Python-list mailing list submissions to
> 	python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> 	python-list-request at python.org
>
> You can reach the person managing the list at
> 	python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."

If timing is critical, try using a semaphore technique.


From google at zvis.com  Tue May 13 16:26:00 2008
From: google at zvis.com (Zvi)
Date: Tue, 13 May 2008 13:26:00 -0700 (PDT)
Subject: How to parse xml with ISO-8859-1 encoding using ElementTree and 
	SimpleXMLTreeBuilder?
Message-ID: <e240695f-0ee7-49d8-a725-42e1f7862a76@p39g2000prm.googlegroups.com>

Hi All,

I got trouble parsing xml returned by web service. XML data contains
characters above 128, so ET.fromstring throws an error. Error is
thrown from python's xmllib.py file, where it detects char above 128.
I am replacing utf-8 encoding string in returned xml with
'ISO-8859-1', and then I call .encode with ISO-8859-1 param. Still I
get the parsing error, illegal character.
What's interesting is that if I define a string const and assign it
the value returned from the service request it gets parsed. I.e. the
following gets parsed ok.


TEST_EVNVELOPE2 = """<?xml version="1.0" encoding="ISO-8859-1"?>
                     <soap:Envelope xmlns:soap="http://
schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/
XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
                     <soap:Body><GetResponse xmlns="http://
tempuri.org/">
                     <GetResult>&lt;?xml version="1.0"
encoding="ISO-8859-1"?&gt;&lt;Response&gt;&lt;Entity Name="Accounts"
Current="00300571BDF91DDCA7D1320EE5C78877"&gt;&lt;Field Name="Name"
Value="Bad und WA?rmetechnik FA_hrwirt GmbH"/&gt;&lt;/Instance&gt;&lt;/
Entity&gt;&lt;/Response&gt;</GetResult></GetResponse>
                     </soap:Body></soap:Envelope>"""

CHARSET = 'ISO-8859-1'

      ET.XMLTreeBuilder = SimpleXMLTreeBuilder.TreeBuilder
      spEnv = TEST_EVNVELOPE2
      spEnv = spEnv.replace('utf-16', CHARSET)
      spEnv = spEnv.replace('utf-8', CHARSET)
      dom=ET.fromstring(spEnv.encode(CHARSET))

however when spEnv is assigned response.content directly I get parsing
error in ET.fromstring, even though TEST_EVNVELOPE2 value is just
pasted from the browser's src code, that is I just dumped
response.content to rendered html and then copied it from html src.
Why it works as a  string const and not as variable value?

So, what's the correct way to make parsing work?



From kibleur.christophe at gmail.com  Sat May 24 09:28:06 2008
From: kibleur.christophe at gmail.com (Tool69)
Date: Sat, 24 May 2008 06:28:06 -0700 (PDT)
Subject: need some help in serving static files inside a wsgi apps
Message-ID: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>

Hi,

Until now, I was running my own static site with Python, but I'm in
need of dynamism.

After reading some cgi tutorials, I saw Joe Gregorio's old article
"Why so many Python web frameworks?" about wsgi apps [http://
bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
question about it. The code he gave works like a charm (I had to make
a little change because SQLAlchemy has changed since), but how the
hell can I serve static files (css, js, images, etc.) within an wsgi
app, ie inside a '/static' directory ?!

Sorry if my question is a stupid one, but I cannot find an easy way to
do this. Each tutorial I'm reading out there does not talk about them
at all. All of my python books didn't mention wsgi either.

I know I could use web.py, web2py, Cherrypy, Django, Pylons, etc. but
I'm trying to understand basics of web dev. from their roots.

thanks in advance for any advice ,

Kib.


From ian.g.kelly at gmail.com  Mon May  5 13:38:17 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Mon, 5 May 2008 11:38:17 -0600
Subject: How to pass a multiline arg to exec('some.exe arg')?
Message-ID: <3fc761710805051038h3729b49bhf1118913f662e6e1@mail.gmail.com>

>  btw, is it necessarily to close() osql[1] in order to get res?
>  without close() the script seems is waiting for smth.
>  I'd like to get "res" in a loop:
>  write()
>  read()
>  write()
>  read()
>  ...
>  is it possible?

Yes, call flush() each time you're done writing.


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 05:52:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 11:52:16 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com>
Message-ID: <48314dd0$0$32138$426a34cc@news.free.fr>

Henrique Dante de Almeida a ?crit :
> On May 17, 7:32 pm, Vicent Giner <vgi... at gmail.com> wrote:
>> Hello.
>>
(snip)
>> However, it is usually said that Python is not a compiled but
>> interpreted programming language ?I mean, it is not like C, in that
>> sense.
>>
(snip)
>  I guess that python is not a good language for that. 
(snip)
>  My opinion: choose compiled or byte compiled languages. 

Slightly OT (ie : not talking about computation-heavy alorgithm being 
better implemented in C then wrapped in Python - this seems quite 
obvious) but just a couple facts:

1/ being interpreted or compiled (for whatever definition of these 
terms) is not a property of a language, but a property of an 
implementation of a language.

2/ actually, all known Python implementations compile to byte-code.



From drjekil77 at gmail.com  Fri May  9 09:54:26 2008
From: drjekil77 at gmail.com (drjekil)
Date: Fri, 9 May 2008 06:54:26 -0700 (PDT)
Subject: help needed!
Message-ID: <17148388.post@talk.nabble.com>


i have a script which will do a specific task for a file in a folder,now i
would like to do the same task  for the all files in that folder(25
files).how can i do that?

Thanks in advance.

-- 
View this message in context: http://www.nabble.com/help-needed%21-tp17148388p17148388.html
Sent from the Python - python-list mailing list archive at Nabble.com.



From clyfish at gmail.com  Wed May  7 22:29:58 2008
From: clyfish at gmail.com (clyfish at gmail.com)
Date: Wed, 7 May 2008 19:29:58 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
	<708883cd-5cc8-4507-b91e-841dd10d149a@c19g2000prf.googlegroups.com>
Message-ID: <8c5a14fe-dd65-4ed0-bcd5-384ba3e6ffe2@q27g2000prf.googlegroups.com>

On 5?7?, ??9?45?, Justin Ezequiel <justin.mailingli... at gmail.com>
wrote:
> On May 6, 5:19 pm, clyf... at gmail.com wrote:
>
>
>
> > In cmd, I can use find like this.
>
> > C:\>netstat -an | find "445"
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
>
> > C:\>
>
> > And os.system is OK.>>> import os
> > >>> os.system('netstat -an | find "445"')
>
> >   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
> >   UDP    0.0.0.0:445            *:*
> > 0
>
> > But I don't know how to use subprocess.Popen to do this.
>
> > from subprocess import Popen, PIPE
>
> > p1 = Popen(['netstat', '-an'], stdout = PIPE)
> > p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> > print p2.stdout.read()
>
> > It doesn't work.
> > Because subprocess.Popen execute "find" like this.
>
> > C:\>find \"445\"
> > ???? - \
>
> > C:\>
>
> > It adds a '\' before each '"'.
> > How to remove the '\'?
> > Thank you.
>
> cannot help with the backslashes but try findstr instead of find

Thank you.
findstr doesn't need quotes, so it works.


From gandalf at shopzeus.com  Tue May  6 10:58:15 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Tue, 06 May 2008 16:58:15 +0200
Subject: Another MIDI question - soundfonts
In-Reply-To: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>
References: <8200bab70805060538g7628b24bo21b75f02e93fc2aa@mail.gmail.com>
Message-ID: <48207207.8@shopzeus.com>

Chuckk Hubbard wrote:
> Hello.
>
> I'm writing a microtonal sequencer, and I don't want to use MIDI per
> se, but I'd like to be able to load standard sample banks to play.
> The only standard format I'm familiar with is soundfont, and it seems
> to be the most popular; if anyone knows of others, especially for Mac,
> which I believe most of my software's users will be using, I'd love to
> know about it.
> And, does anyone know a python module that will allow me to load in
> soundfont files and make use of their info?  I'd like to be able to
> remap the pitches, of course, but using the same presets and such.
>   
I have no clue but I believe that you can find VST instruments that can 
load sound fonts. I'm almost sure that you'll find a VST sound font 
player that can be loaded as a DLL on Windows. Then you can use that DLL 
from Python for sure. ( Ugly interface. :-& )

   L



From Scott.Daniels at Acm.Org  Sat May 31 18:38:08 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 31 May 2008 15:38:08 -0700
Subject: Need Tutorial For the following lib
In-Reply-To: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>
References: <9950cf3f-e58a-413a-bdff-a40cc1c6cf6d@8g2000hse.googlegroups.com>
Message-ID: <Ca6dnV-iv7-2TNzVnZ2dnUVZ_vjinZ2d@pdx.net>

Gandalf wrote:
> Hi every one. I need comprehensive tutorial for the following
> library :
> 1. pyWinAuto
> 2. winGuiAuto

I file all my Tutorials here:
      http://www.google.com

In case you didn't notice, a few people are beginning to think you
are too lazy about doing the first steps yourself.

--Scott David Daniels
Scott.Daniels at Acm.Org


From Scott.Daniels at Acm.Org  Tue May 20 21:09:54 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 20 May 2008 18:09:54 -0700
Subject: iterate start at second row in file not first
In-Reply-To: <82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
	<82eae2b4-61a5-4cc9-8fcb-d448e71bfc7d@f36g2000hsa.googlegroups.com>
Message-ID: <tt6dnfZ1Ca3P6a7VnZ2dnUVZ_hadnZ2d@pdx.net>

Mark d. wrote:
> How about:
> 
> mov = open(afile)
> line = mov.readline()
> ...(process your ':' line)
> for line in mov.readlines():
>    ...
The problem here is that you read the entire file in in the
call to readlines.

--Scott David Daniels
Scott.Daniels at Acm.Org



From castironpi at gmail.com  Thu May  8 20:12:16 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:12:16 -0700 (PDT)
Subject: Running a python code periodically
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com> 
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com> 
	<mailman.804.1210278715.12834.python-list@python.org>
Message-ID: <0da224da-895d-4d8c-a2e9-ecb5923d6a79@j22g2000hsf.googlegroups.com>

On May 8, 3:31?pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Maryam Saeedi" <ma.sae... at gmail.com> wrote in message
>
> news:ee9cd3be0805080902g48e641bxbcf1d5578620defe at mail.gmail.com...
> |I was wondering if you know how can I run a python code once every five
> | minutes for a period of time either using python or some other program
> like
> | a bash script.
>
> I expect the following should work.
>
> from time import sleep
> while True: #or
> # for i in range(nunber_of_cycles):
> ? do_whatever()
> ? sleep(600)
>
> assuming do_whatever() is quick and you do not need exactly 5 minute
> intervals.
>
> | I have asked this question before and some of you answered me but I still
> | have problem. Most of the answers was to use cron and crontab which works
> on
> | my computer but not if I want to do it on department's computer since I
> do
> | not have permission to change those files. Is there any other way which
> does
> | not need administrator permission?

I'm on Windows, but it's fine.

I've written a driver for in-time hooks with the Keyboard and Mouse
before, just not in Python.  If MinGW can color it, it'll show up on
the newsgroup.  From preliminary evaluations of the number of
dimensions of human perception (including basis vectra), you could
pass colors in time: colors harmonize in more dimensions than sound
does; you couldn't do the same thing with sound, necessarily, unless
you seat at a bar.


From sipickles at googlemail.com  Fri May  2 15:13:41 2008
From: sipickles at googlemail.com (Simon Pickles)
Date: Fri, 02 May 2008 20:13:41 +0100
Subject: Writing elapsed time as a string
Message-ID: <481B67E5.7040507@googlemail.com>

Hello.

I'm sorry if this has been asked a thousand (million) times.

Is there a nifty pythonesque way to produce a string representing an 
elapsed time period, in terms of years, months, days, hours, mins, seconds?

I am storing times in a MySQL db, and would love to be able to write the 
time elapsed between accesses of certain data. These are in seconds 
since the epoch, as produced by time.time()

It is probable right in front of me in the docs but I am spinning off 
into outer space (mentally!)

Thanks for the temporary loan of your clarity and experience.

Simon
-- 

http://www.squirtual-reality.com
--------------------------------
Linux user #458601 - http://counter.li.org.


From alex.m.gusarov at gmail.com  Thu May 29 03:41:39 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:41:39 +0700
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
	<e3a81e680805282100w77a8cc3br3bf9486ee74eb4ab@mail.gmail.com>
Message-ID: <ac6dcb3d0805290041w4e40eee4o261e693c39542aa3@mail.gmail.com>

>
> Yes. That is the somewhat unfortunate difference between new-style and
> old-style classes. Use new-style if you can, and that means that "object"
> must be part of the inheritance graph.
>
...

> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov
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From sjmachin at lexicon.net  Mon May 12 19:26:44 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 12 May 2008 23:26:44 GMT
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <mailman.1003.1210630330.12834.python-list@python.org>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>	<op.ua04evz4x6zn5v@a98gizw.cpe.telecentro.net.ar>
	<mailman.1003.1210630330.12834.python-list@python.org>
Message-ID: <4828d232@news.mel.dft.com.au>

Terry Reedy wrote:
> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
> news:op.ua04evz4x6zn5v at a98gizw.cpe.telecentro.net.ar...
> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanemupp at yahoo.se> 
> escribi?:
> 
> | (We used this question last year - some people gave a sensible answer
> | in less | than 5 minutes, but others did not even know how to start)
> 
> Another approach  I do not remember seeing here (under 10 minutes)
> 
> fb = ('FizzBuzz', None, None, 'Fizz', None, 'Buzz', 'Fizz',
>       None, None, 'Fizz', 'Buzz', None, 'Fizz', None, None)
> for i in range(1,101): print(fb[i%15] or i) #3.0

"#3.0" is rather cryptic. AFAIK that will work with *any* version of 
Python up to 3.0. The "() after "print" are required in 3.0 and optional 
in earlier versions.



From arnodel at googlemail.com  Tue May  6 16:35:24 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 06 May 2008 21:35:24 +0100
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <m2ve1r5fxv.fsf@googlemail.com>

Anton Slesarev <slesarev.anton at gmail.com> writes:

> f = open("bigfile",'r')
>
> flines = (line for line in f if pat.search(line))
> c=0
> for x in flines:
>     c+=1
> print c

It would be simpler (and probably faster) not to use a generator expression:

search = re.compile('sometext').search

c = 0
for line in open('bigfile'):
    if search(line):
         c += 1

Perhaps faster (because the number of name lookups is reduced), using
itertools.ifilter:

from itertools import ifilter

c = 0
for line in ifilter(search, 'bigfile'):
    c += 1


If 'sometext' is just text (no regexp wildcards) then even simpler:

...
for line in ...:
    if 'sometext' in line:
         c += 1

I don't believe you'll easily beat grep + wc using Python though.

Perhaps faster?

sum(bool(search(line)) for line in open('bigfile'))
sum(1 for line in ifilter(search, open('bigfile')))

...etc...

All this is untested!
-- 
Arnaud


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 05:54:42 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 11:54:42 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <mailman.1370.1211243204.12834.python-list@python.org>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>	<mailman.1361.1211228890.12834.python-list@python.org>	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<mailman.1370.1211243204.12834.python-list@python.org>
Message-ID: <48329fdc$0$24562$426a74cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Mon, 19 May 2008 17:58:48 -0300, bruno.desthuilliers at gmail.com 
> <bruno.desthuilliers at gmail.com> escribi?:
> 
>> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
>> (snip)
>>> The main
>>> concept here: identity [usually] implies equality,
>>
>> I really enjoyed the "usually" disclaimer !-)
> 
> In some *rare* cases, identity does not imply equality:

Yeps. That's exactly why I enjoyed this disclaimer...

(snip nan example).


From fiacre.patrick at gmail.com  Fri May 23 01:39:31 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 01:39:31 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
Message-ID: <48365893$0$11617$607ed4bc@cv.net>

Mensanator wrote:
> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>
>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
> 
> If you actually need that many digits, use a different library.
> 
>>>> import gmpy
> 
>>>> print gmpy.pi(64) # 64 bit precision
> 3.14159265358979323846
>>>> print gmpy.pi(128) # 128 bit precision
> 3.141592653589793238462643383279502884197
>>>> print gmpy.pi(16384) # 16384 bit precision
> 3.14159265358979323846264338327950288419716939937510582097494459
> 23....

Heh!


I wonder who needs that many digits?


Certainly not number theorists (they need a LOT more). Certainly not 
physicists -- they need about 30 digits to be within 1% of any 
measurement from molecules to galaxies.  Certainly not engineers, they 
need half the digits that physicists need.  Cryptographers are making a 
dire mistake if they are using PI in any computations (possible 
exception for elliptic curves -- see number theorists, above) ... so -- 
other than PI-philes, who needs PI to thousands of digits?


From kay.schluehr at gmx.net  Tue May 27 12:56:57 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 27 May 2008 09:56:57 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
Message-ID: <b9f868c6-148c-43e6-8291-ae0fab792d9d@f63g2000hsf.googlegroups.com>

On 27 Mai, 17:21, Sverker Nilsson <s... at sncs.se> wrote:
> I was talking about Guido van Rossum
>
> The one who decides, so far when people agree
>
> But we can make a new fork
>
> He is the originator, but now it seems, for me, it is hanging out in
> the air
>
> So we need some new leadership
>
> From somebody, somebody like you perhaps. Or me.
>
> Sverker

Not sure what you are talking about? Do you mean that Python 2.X shall
be advanced independently instead of being some legacy branch while
Python 3.X is the proposed future of all Python?


From rpw3 at rpw3.org  Fri May  9 23:45:26 2008
From: rpw3 at rpw3.org (Rob Warnock)
Date: Fri, 09 May 2008 22:45:26 -0500
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
Message-ID: <cMidnY3lU-7Lh7jVnZ2dnUVZ_qqgnZ2d@speakeasy.net>

George Neuner <gneuner2/@/comcast.net> wrote:
+---------------
| Common Lisp doesn't have "filter".
+---------------

Of course it does! It just spells it REMOVE-IF-NOT!!  ;-}  ;-}

    > (remove-if-not #'oddp (iota 10))

    (1 3 5 7 9)
    > (remove-if-not (lambda (x) (> x 4)) (iota 10))

    (5 6 7 8 9)
    > 


-Rob

-----
Rob Warnock			<rpw3 at rpw3.org>
627 26th Avenue			<URL:http://rpw3.org/>
San Mateo, CA 94403		(650)572-2607



From bruno.desthuilliers at gmail.com  Mon May 12 12:57:34 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 12 May 2008 09:57:34 -0700 (PDT)
Subject: In metaclass, when to use __new__ vs. __init__?
References: <slrng2gqvd.h3o.matt@sprout.tplus1.com>
Message-ID: <baa39c55-a59e-4d1a-ae21-d26881810dd6@r66g2000hsg.googlegroups.com>

On 12 mai, 18:10, Matthew Wilson <m... at tplus1.com> wrote:
> I have been experimenting with metaclasses lately.  It seems possible to
> define a metaclass by either subclassing type and then either redefining
> __init__ or __new__.
>
> Here's the signature for __init__:
>
>     def __init__(cls, name, bases, d):
>
> and here's __new__:
>
>     def __new__(meta, classname, bases, d):
>
> Every metaclass I have found monkeys with d, which is available in both
> methods.  So when is it better to use one vs the other?

Well... The __new__ method is responsible for creating and returning a
new  instance (so in this case, a new class), which is then passed to
the __init__ method. So which one you want to use depends on what you
want to do. If you only want to add some attributes/methods, register
either the class or some of it's methods somewhere etc, then __init__
is fine. If you have to transform / replace / whatever some of the
(not yet) attributes, fiddle with the inheritance tree, cache the
class object or such things, you'd better do it in __new__.


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 03:10:40 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 09:10:40 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1f40f$2avo$1@news.mtu.ru>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>	<g1em6f$916$02$1@news.t-online.com>
	<g1eo0a$27k1$1@news.mtu.ru>	<g1es85$r7u$03$1@news.t-online.com>
	<g1f11p$2a08$1@news.mtu.ru>	<g1f2v2$129$01$1@news.t-online.com>
	<g1f40f$2avo$1@news.mtu.ru>
Message-ID: <483bb3e9$0$5100$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> On Mon, 26 May 2008 21:26:55 +0200, Sebastian 'lunar' Wiesner wrote:
> 
>> [ Ivan Illarionov <ivan.illarionov at gmail.com> ]
>>
>>> If the OP wants PHP-style programming he will get better results with
>>> PHP because PHP was designed this way. Any Pythonic solution will be an
>>> overkill.
>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>> committing suicide by shooting yourself into the head with PHP ...
> 
> :) I can't imagine anything uglier than Python with its significant 
> whitespace wrapped inside HTML. I guess it could be more damaging than 
> PHP which was written exactly for this purpose.

Mako template's syntax looks not so ugly to me:

<%inherit file="base.html"/>
<% rows = [[v for v in range(0,10)] for row in range(0,10)] %>
<table>
     % for row in rows:
         ${makerow(row)}
     % endfor
</table>

<%def name="makerow(row)">
     <tr>
     % for name in row:
         <td>${name}</td>\
     % endfor
     </tr>
</%def>


From stanc at al.com.au  Fri May  2 05:19:07 2008
From: stanc at al.com.au (Astan Chee)
Date: Fri, 02 May 2008 19:19:07 +1000
Subject: get number that is raised to the power of
Message-ID: <481ADC8B.20000@al.com.au>

Hi,
Im not sure if this is more of a math question or a python question. I 
have a variable in python:
 >>> v = 10.0**n
is there a way to find the value of n if i know only v aside from 
str(v).split('+')[1] ? that seems like too much of a hack and I was 
wondering if there was a faster way of doing it?
Thanks for any pointers
Astan

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From python at rgbaz.eu  Fri May  2 05:33:59 2008
From: python at rgbaz.eu (Python.Arno)
Date: Fri, 2 May 2008 11:33:59 +0200
Subject: get number that is raised to the power of
In-Reply-To: <481ADC8B.20000@al.com.au>
References: <481ADC8B.20000@al.com.au>
Message-ID: <97C60C67-80CC-4AF6-A7EF-2B98F618A870@rgbaz.eu>


On 2 mei 2008, at 11:19, Astan Chee wrote:

> Hi,
> Im not sure if this is more of a math question or a python question.  
> I have a variable in python:
> >>> v = 10.0**n
> is there a way to find the value of n if i know only v aside from  
> str(v).split('+')[1] ? that seems like too much of a hack and I was  
> wondering if there was a faster way of doing it?
> Thanks for any pointers
> Astan
>

>

the "reverse" of a power to is logarithm
so v = 10**n  <=>  math.log(v,10) = n

Arno


From kris at FreeBSD.org  Thu May 29 18:17:05 2008
From: kris at FreeBSD.org (Kris Kennaway)
Date: Fri, 30 May 2008 00:17:05 +0200
Subject: mmap class has slow "in" operator 
Message-ID: <483F2B61.6050306@FreeBSD.org>

If I do the following:

def mmap_search(f, string):
	fh = file(f)
	mm = mmap.mmap(fh.fileno(), 0, mmap.MAP_SHARED, mmap.PROT_READ)

	return mm.find(string)

def mmap_is_in(f, string):
	fh = file(f)
	mm = mmap.mmap(fh.fileno(), 0, mmap.MAP_SHARED, mmap.PROT_READ)

	return string in mm

then a sample mmap_search() call on a 50MB file takes 0.18 seconds, but 
the mmap_is_in() call takes 6.6 seconds.  Is the mmap class missing an 
operator and falling back to a slow default implementation?  Presumably 
I can implement the latter in terms of the former.

Kris


From slesarev.anton at gmail.com  Wed May  7 17:11:48 2008
From: slesarev.anton at gmail.com (Anton Slesarev)
Date: Wed, 7 May 2008 14:11:48 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.708.1210173789.12834.python-list@python.org>
Message-ID: <3a44bead-6995-486a-886d-7d3a57766b62@m73g2000hsh.googlegroups.com>

On May 7, 7:22 pm, Pop User <popu... at christest2.dc.k12us.com> wrote:
> Anton Slesarev wrote:
>
> > But I have some problem with writing performance grep analog.
>
> I don't think you can ever catch grep.  Searching is its only purpose in
> life and its very good at it.  You may be able to come closer, this
> thread relates.
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> This relates to the speed of re.  If you don't need regex don't use re.
>   If you do need re an alternate re library might be useful but you
> aren't going to catch grep.

In my last test I dont use re. As I understand the main problem in
reading file.


From straton at lampsacos.demon.co.uk  Sun May 18 08:05:32 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 13:05:32 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
Message-ID: <g0p62e$mpb$1$8300dec7@news.demon.co.uk>

Oops. I meant:

WhiteArea=Result.histogram()[255]

of course, not

WhiteArea=Result.histogram()[0]

Ken Starks wrote:
> As others have said, PIL has the 'histogram' method to do most of the 
> work. However, as histogram works on each band separately, you have
> a bit of preliminary programming first to combine them.
> 
> The ImageChops darker method is one easy-to-understand way (done twice),
> but there are lots of alternatives, I am sure.
> 
> 
> # ------------------------------------
> 
> import Image
> import ImageChops
> 
> Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> R,G,B = Im.split()
> 
> Result=ImageChops.darker(R,G)
> Result=ImageChops.darker(Result,B)
> 

#### Mistake here:

> WhiteArea=Result.histogram()[0]

> TotalArea=Im.size[0] * Im.size[1]
> PercentageWhite = (WhiteArea * 100.0)/TotalArea
> 
> 
> 
> 
> 
> Poppy wrote:
>> I've put together some code to demonstrate what my goal is though 
>> looping pixel by pixel it's rather slow.
>>
>> import Image
>>
>> def check_whitespace():
>>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
>>
>>     size = im.size
>>
>>     i = 0
>>     whitePixCount = 0
>>     while i in range(size[1]):
>>         j = 0
>>         while j in range(size[0]):
>>             p1 = im.getpixel((j,i))
>>             if p1 == (255, 255, 255):
>>                 whitePixCount = whitePixCount + 1
>>                 if whitePixCount >= 492804:  ## ((image dimensions 
>> 1404 x 1404) / 4) 25%
>>                     return "image no good"
>>             j = j + 1
>>         i = i + 1
>>
>>     print whitePixCount
>>
>>     return "image is good"
>>
>> print check_whitespace()
>>
>>
>> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>>> I need to write a program to examine images (JPG) and determine how 
>>> much area is whitespace. We need to throw a returned image out if too 
>>> much of it is whitespace from the dataset we're working with. I've 
>>> been examining the Python Image Library and can not determine if it 
>>> offers the needed functionality. Does anyone have suggestions of 
>>> other image libraries I should be looking at it, or if PIL can do 
>>> what I need?
>>>
>>
>>


From afilash+python at gmail.com  Fri May 30 08:44:30 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Fri, 30 May 2008 18:14:30 +0530
Subject: how can i stop script from running on login ?
Message-ID: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>

Hi all,

One of my friends played some tricky thing, and now I am in great trouble,
please help
Here is the scenario  [windows xp ]:

He wrote one login script and put it on the start program folder under 'All
Users'
The script is like this it will issue a log off command when we login; due
to this I am not able to login to my system even he himself not able to
access the system and solve the problem. The main thing is the script is of
'.pyw' type so I can't able to close the CMD window to stop this script

How can I remove that script? Any help will be appreciated, thanks in
advance

Abhilash
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From deets at nospam.web.de  Wed May 21 17:16:53 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 23:16:53 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <69jhqnF324rmkU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
> 
>> My understand is no, not if you're using IEEE floating point.
> 
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

Who says that rounding on base 10 is more correct than rounding on base 2?

And in scientific programming, speed matters - which is why e.g. the 
cell-processor shall grow a double-precision float ALU. And generally 
supercomputers use floats, not arbitrary precision BCD or even rationals.


Diez


From iainking at gmail.com  Tue May 13 09:43:13 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 06:43:13 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
References: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>
	<isydnVLsOO-7CLTVnZ2dnUVZ_obinZ2d@comcast.com>
Message-ID: <46508224-d4c6-4982-a29f-04d29b3d5a2c@m36g2000hse.googlegroups.com>

On May 13, 2:20 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> Iain King wrote:
> > Hi.  I have a modal dialog whcih has a "Browse..." button which pops
> > up a file selector.  This all works fine, but the first thing the user
> > has to do when they open the dialog is select a file, so I would like
> > the dialog to automatically call the onBrowse function as soon as the
> > dialog opens.  However, I don't know how to do this.
>
> > dlg.ShowModal()
> > onBrowse()
>
> > obviously doesn't work, and neither does the reverse.  I was hoping
> > that the dialog would throw some kind of "I have been shown" event,
> > but it doesn't (as far as I can tell).  How do I make the dialog do
> > something as soon as it's been shown?
>
> > Iain
>
> If the only things on your modal dialog are Browse and cancel, just call the
> wx.FileDialog directly and eliminate the intermediate modal dialog.  If not
> don't bind the FileDialog to a button, just create an instance of it as the last
>   you do in the __init__ method of the modal dialog code.
>
> If this doesn't help, you will have better luck posting to wxpython newsgroup.
>
> -Larry

The dialog doesn't only let you call the file dialog, it does other
stuff too.  Your suggestion of __init__ sounded promising, but neither
giving the dialog an __init__() method nor an OnInit() method worked.
Thanks anyway.

Iain


From geonomica at gmail.com  Thu May 15 20:32:50 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 15 May 2008 17:32:50 -0700 (PDT)
Subject: rough set & python
Message-ID: <f9e642ee-6454-4acf-99d8-2846668f6b50@d45g2000hsc.googlegroups.com>

I've just wrapped the rough set library from C to python. Could
anybody help me to test it and debug?

thanks

Gianluca


From nicolas.dandrimont at gmail.com  Sat May 10 17:15:07 2008
From: nicolas.dandrimont at gmail.com (Nicolas Dandrimont)
Date: Sat, 10 May 2008 23:15:07 +0200
Subject: Python doesn't recognize quote types
In-Reply-To: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <20080510211507.GB24788@dirichlet.crans.org>

* wxPythoner at gmail.com <wxPythoner at gmail.com> [2008-05-10 13:56:39 -0700]:

> There's a thing that bugs me in Python. Look at this...
> 
> >>> print "Testing\"
> SyntaxError: EOL while scanning single-quoted string
> 
> 
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?

The "single-quoted string" (e.g. 'foo' or "bar") is so named by 
opposition to triple-quoted (e.g.  '''foo''' or """bar""") strings.

Regards,
-- 
Nicolas Dandrimont

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From Scott.Daniels at Acm.Org  Sun May 25 15:17:10 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 25 May 2008 12:17:10 -0700
Subject: QOTW
In-Reply-To: <mailman.1542.1211661983.12834.python-list@python.org>
References: <mailman.1525.1211632496.12834.python-list@python.org>	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>	<mailman.1532.1211644302.12834.python-list@python.org>	<g19fv3$3vl$1@gide.ita.chalmers.se>	<18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<mailman.1542.1211661983.12834.python-list@python.org>
Message-ID: <KN-dnckJZ6CDJKTVnZ2dnUVZ_oDinZ2d@pdx.net>

D'Arcy J.M. Cain wrote:

> Yes!  One of the biggest advantages to unit testing is that you never
> ever deliver the same bug to the client twice.  Delivering software
> with a bug is bad but delivering it with the same bug after it was
> reported and fixed is calamitous.

QOTW for sure.

--Scott David Daniels
Scott.Daniels at Acm.Org



From bronger at physik.rwth-aachen.de  Thu May  1 01:06:52 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 01 May 2008 07:06:52 +0200
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org>
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com>
Message-ID: <87skx2bok3.fsf@physik.rwth-aachen.de>

Hall?chen!

Sam writes:

> I also have a problem with relative import; I can't for the life of me
> figure out how to use the damn thing. I think the main problem is with
> getting Python to recognize the existence of a package. I have
>
> S/
>   p.py
>   B/
>     b.py
>   W/
>     pyw/
>       u.py
>       ws.py
>
> and I'd like to get u.py to import all the other 3 programs. I put
> empty __init__.py files in all of the above directories (is this
> necessary?), and even manually added the pathway (r'C:\Myname\S') to
> sys.path, but when I execute
>
> from S import p
>
> in u.py Python gives "ImportError: No module named S".

I didn't look it up myself, but maybe a __init__.py file is missing
so that it can be recognised as a package.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From martin at v.loewis.de  Thu May  1 10:30:34 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 16:30:34 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
Message-ID: <4819D40A.1000205@v.loewis.de>


> lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> referenced symbol not found

You need to link _psycopg.so with the math library, -lm.

Regards,
Martin


From deets at nospam.web.de  Fri May  2 10:45:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 16:45:56 +0200
Subject: creating a list from a inconsistent text file
In-Reply-To: <ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <680np7F2qssisU1@mid.uni-berlin.de>

Jetus schrieb:
> On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
>>> I have a comma delimited file that is separated by comma's, and then
>>> sometimes by ","
>>> c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
>>> 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
>>> c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
>>> 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
>>> c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
>>> 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>> The items are always delimited by commas but some items themselves contain
>> a comma and therefore are enclosed in double quotes.  So it's not
>> inconsistent.
>>
>>> How do I convert that line into a list?
>> Use the `csv` module in the standard library.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

As Marc said: use the CSV-module. It will ignore the comma inside 
""-surrounded fields. Then, once you extracted the columns, you might 
consider using the split-method on the columns to process further.

Diez


From s0suk3 at gmail.com  Thu May 15 17:13:51 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 15 May 2008 14:13:51 -0700 (PDT)
Subject: exists=false, but no complaint when i open it!?
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
	<mailman.1174.1210868506.12834.python-list@python.org> 
	<a7b8c26d-e7b7-4986-b560-0ca569593005@34g2000hsf.googlegroups.com> 
	<6ee5c146-dfe7-4b0b-99e7-b0905023b62a@d1g2000hsg.googlegroups.com> 
	<de23bd7f-75fb-4cfb-bbc0-14dc469ef6ce@k37g2000hsf.googlegroups.com>
Message-ID: <ce00d345-d063-4bc2-9f76-988024be5f99@s50g2000hsb.googlegroups.com>

On May 15, 12:07 pm, globalrev <skanem... at yahoo.se> wrote:
> On 15 Maj, 19:04, globalrev <skanem... at yahoo.se> wrote:
>
> > when i try to write to the file...
>
> > Traceback (most recent call last):
> >   File "C:\Python25\myPrograms\netflix\netflix.py", line 10, in
> > <module>
> >     d.write('hej du galne kock')
> > IOError: [Errno 0] Error
>
> damn i take a break lol.
>
> r+ ldo when open file so i CAN write to it...

That traceback doesn't provide much help ("[Errno 0] Error"...), but I
remember that one time I got it when trying to write to a file opened
for reading. Make sure you're opening the file for writing (passing
"w" as the second argument to open(), or "wb" if you're writing binary
data). Also, as everyone keeps pointing out to you, watch out for
backslash scapes -- double the slashes ("\\", that really means a
single \ to Python), use forward slashes ("/", perhaps not the most
elegant solution, but it always works), or put an "r" next to the
string (r"your\path"). The last form is the easiest, but it only works
if you're typing a literal; you'll eventually need to double slashes
(e.g., for replacing something in a string: s.replace("/", "\\")).



From ivan.illarionov at gmail.com  Wed May  7 19:46:33 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 7 May 2008 23:46:33 +0000 (UTC)
Subject: slicing lists
References: <rXqUj.120085$rd2.64592@pd7urf3no>
Message-ID: <fvtf0p$6pj$1@news.mtu.ru>

On Wed, 07 May 2008 23:29:27 +0000, Yves Dorfsman wrote:

> Is there a way to do:
> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
> x[0,2:6]
> 
> That would return:
> [0, 3, 4, 5, 6]

IMHO this notation is confusing.

What's wrong with:
[0]+x[2:6] 
 
> I am surprised this notation is not supported, it seems intuitive. A
> concrete example of the sort of thing I want to do:
> 
> p = file('/etc/passwd').readlines()
> q = [ e.strip().split(':')[0,2:] for e in p ]
> 
> (getting rid of the password / x field)

This works and is clearer:
[[0] + e.strip().split(':')[2:] for e in open('/etc/passwd')]

-- 
Ivan


From zapwireDASHgroups at yahoo.com  Thu May 22 16:39:28 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 13:39:28 -0700
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
Message-ID: <6SkZj.161533$fB7.33031@en-nntp-06.dc1.easynews.com>

"Peter Otten" <__peter__ at web.de> wrote in message 
news:g14gkp$gs2$01$1 at news.t-online.com...
>> A slightly similar problem: If I want to "merge," say, list1=[1,2,3] ...
>>>> items = [None] * 6
>>>> items[::2] = 1,2,3
>>>> items[1::2] = 4,5,6
>>>> items
> [1, 4, 2, 5, 3, 6]

Thanks Peter, that's pretty clean -- I like it!




From landofdreams at gmail.com  Thu May  1 02:17:50 2008
From: landofdreams at gmail.com (Sam)
Date: Wed, 30 Apr 2008 23:17:50 -0700 (PDT)
Subject: relative import broken?
References: <mailman.373.1209563516.12834.python-list@python.org> 
	<9c6ba5f9-d65b-4265-baba-fc5d7936781b@d1g2000hsg.googlegroups.com> 
	<87prs6x1ye.fsf@mulj.homelinux.net>
	<33782b65-6d6d-4ae7-8539-29f809ae5077@d45g2000hsc.googlegroups.com>
	<87iqxyboae.fsf@physik.rwth-aachen.de>
	<6ddbc077-0092-4378-b613-5a5656b0e53e@l42g2000hsc.googlegroups.com>
	<87abjablo5.fsf@physik.rwth-aachen.de>
Message-ID: <85ef434e-a340-400b-86d3-faa98f951b6a@b64g2000hsa.googlegroups.com>

> > I added r'C:\Users\Myname\S' to sys.path. Is this the correct usage?
>
> Try r'C:\Users\Myname'.

Excellent, it works! Thanks, Torsten.

Sam


From frankdmartinez at gmail.com  Sat May 10 20:09:02 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Sat, 10 May 2008 17:09:02 -0700 (PDT)
Subject: Initializing a subclass with a super object?
References: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>
	<7242ff91-dac4-4380-ba80-c18fa9494181@v26g2000prm.googlegroups.com>
Message-ID: <ab98324b-71d8-42c6-ba96-53af09ed12f8@f36g2000hsa.googlegroups.com>

Hi, Terry.
    Yeah, no.  If we think of the inherited B as an object nested
within a1, I'm attempting to initialize that B with b1 by accessing
the B, say, via a function call.  I don't see how using a python
factory achieves this.


From duncan.booth at invalid.invalid  Fri May  9 06:41:18 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 May 2008 10:41:18 GMT
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <Xns9A9976D7CDC64duncanbooth@127.0.0.1>

dmitrey <dmitrey.kroshko at scipy.org> wrote:

> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
>> On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
>>
>> > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
>> > and
>> > list2 = [0, 2, 4] # integer elements
>>
>> > howto (I mean most simple recipe, of course) form list3 that contains
>> > elements from list1 with indexes from list2, i.e.
>>
>> list3 = [list1[i] for i in list2]
>>
> 
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
> 

Did you try Paul's suggestion?

Python 2.3.5 (#1, Oct 13 2005, 09:17:23)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
>>> list2 = [0, 2, 4]
>>> list3 = [list1[i] for i in list2]
>>> list3
['elem0', 'elem2', 'elem4']



From bignose+hates-spam at benfinney.id.au  Sat May 24 09:44:21 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 May 2008 23:44:21 +1000
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
Message-ID: <87abifbyve.fsf@benfinney.id.au>

David <wizzardx at gmail.com> writes:

> What strategies do you use to ensure correctness of new code?

Behaviour Driven Development <URL:http://behaviour-driven.org/>.

* Start with an automated unit test suite that passes.

* Describe, as formally or informally as you like, but *not* in code,
  the new or altered behaviour that the code should exhibit.

* Assert some simple aspect of that behaviour in an automated unit
  test that asserts one single true/false statement.

  This forces you to be absolutely specific about the new behaviour
  you're about to implement, at exactly the point where you need that
  specification.

  It also forces you to think about the code from the perspective of
  an external user of the code, *before* implementing it. This leads
  over time to much better-designed APIs, without large up-front
  planning.

* Run the entire unit test suite; watch the new test fail with an
  explanation of why it failed.

  At this point you know your unit test suite will fail, with a good
  explanatory message, in any future failure of the code to implement
  the specified behaviour.

* Alter the application in the simplest possible way to make the
  entire unit test suite pass. Don't be clever, don't optimise
  anything (yet); be lazy. Do the simplest thing that could possibly
  work.

  This ensures you don't have any code that isn't necessary to
  implement your specified requirements. Since you designed an
  implemented a test that will use this code first, you should have a
  much better idea of the simplest code that will satisfy it, and
  won't have to go down so many wasteful dead-ends.

* Run the entire unit test suite. Fix any failing tests.

  The existing tests in the unit test suite will show any regressions
  you introduced. You might need to re-evaluate the relevance of old
  tests as you specify and implement new behaviour.

* Only once the entire unit test suite passes again, refactor any code
  that now exhibits redundancies or inelegancies.

  This doesn't permit you to change behaviour or API; "refactor" means
  changing the structure of the code without changing its behaviour.

* Run the entire unit test suite. Fix any failing tests.

  You have now designed, specified, implemented, and tested the new
  behaviour. Check your code into your VCS with an appropriate message
  saying what you implemented and why.

* Repeat from the top.

> Specifically, if you've just written 100 new lines of Python code,
> then:
> 
> 1) How do you test the new code?

Write the tests first, and make sure you aren't writing so much new
code between tests.

> 2) How do you ensure that the code will work correctly in the future?

Always run your complete automated unit test suite between changes to
the code. If possible, arrange for the unit test suite to be run
automatically every time you change your working copy of the code
and/or tests. That way you only have to look at the output when you
want to know what effect you just had on the pass/fail status.

Treat any bug as "desired change to the behaviour of the code", and
begin by implementing a new unit test that fails because of the bug.
Then your unit test suite will catch any regression of the bug.

-- 
 \         ?In case you haven't noticed, [the USA] are now almost as |
  `\         feared and hated all over the world as the Nazis were.? |
_o__)                                           ?Kurt Vonnegut, 2004 |
Ben Finney


From daveparker at flamingthunder.com  Mon May 19 23:27:56 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 19 May 2008 20:27:56 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<SYWdnYoHYaFzT7TVnZ2dnUVZ_sHinZ2d@posted.visi>
Message-ID: <355dfd10-4ee1-4171-9655-24a8dfe25e9c@k1g2000prb.googlegroups.com>

On May 13, 11:42?am, Grant Edwards <gra... at visi.com> wrote:
> Well, python will definitely never have a name that sounds like
> a slang term for happens after you get food poisioning at a
> Thai restaurant...

:)


From tjreedy at udel.edu  Tue May 20 13:43:15 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 13:43:15 -0400
Subject: subprocess - please enhance the documentation
References: <69fmseF329s6vU1@mid.dfncis.de>
Message-ID: <g0v2jh$fk4$1@ger.gmane.org>


"Helmut Jarausch" <jarausch at igpm.rwth-aachen.de> wrote in message 
news:69fmseF329s6vU1 at mid.dfncis.de...
| Hi,
|
| I'd like to suggest to add a few lines to chapter 17.1.3.5 "Replacing 
os.popen"
| (Python Doc 2.5.2)

1. Take a look at the existing 2.6 manual (on Python.org) to make sure it 
has not already been improved.  If not..

2. Post your suggestions on bugs.python.org and mark the item as 
documentation and stdlib.  Suggest the specific addition or change you 
would like to see.  If accepted, one of the doc-masters with add it with 
the needed formatting code and possibly stylistic changes.

| I have used the following code in the past
|
| ARC='MyDumpFile'
| tar_inp= os.popen('/bin/tar cjf '+ARC+' -T -','w')
| ....
| tar_exit_code= tar_inp.close()
| if  tar_exit_code != None and tar_exit_code % 256 :
|   print "some error messages"
|
| When replacing this - as suggested - by
|
| TAR= Popen(('/bin/tar','cjf',ARC,'-T','-'),stdin=PIPE)
| tar_inp= TAR.stdin
| ....
| tar_inp.close() always returns None.
|
| So I have replaced this by
|
| tar_inp.close()
| tar_exit_code= TAR.wait()
|
| if  tar_exit_code != 0 :
|   print "some error messages"
|
|
| Perhaps a few lines telling about this would be helpful.
|
| Thanks,
| Helmut.
|
| -- 
| Helmut Jarausch
|
| Lehrstuhl fuer Numerische Mathematik
| RWTH - Aachen University
| D 52056 Aachen, Germany
| --
| http://mail.python.org/mailman/listinfo/python-list
| 





From brian.darkblueb at gmail.com  Sat May  3 18:25:35 2008
From: brian.darkblueb at gmail.com (darkblueB)
Date: Sat, 3 May 2008 15:25:35 -0700 (PDT)
Subject: PIL JPEG mis-step
Message-ID: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>

I got the Python Imaging Library from source, built and installed, on
Ubuntu 7.10, not realizing I could run a self-test first. libjpeg is
on the machine, but was not detected.. so no JPG encoder. I got the
dev-libjpg and rebuilt PIL. The self-test now shows JPG support.

but running setup.py install again seems to succeed, but still no
JPG :-(

fix ideas appreciated




From nick at craig-wood.com  Thu May  1 09:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 01 May 2008 08:30:03 -0500
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <slrng1jh5a.548.nick@irishsea.home.craig-wood.com>

Lance Gamet <lance at gamet.com> wrote:
>  This project will store most of its actual data in a shared-database, but 
>  I have a small amount of user specific data that I need to be stored like 
>  configuration or preferences for example, the list of databases that the 
>  program should connect to.
> 
>  On Unix this might be a .file, on windows this could be in the registry, 
>  or an ini file or an xml file in ProgramData or AppData or something.
> 
>  Is there a pythony way to store such config data, perhaps there is 
>  already a standard python package for such a purpose?

I've found

  http://docs.python.org/lib/module-ConfigParser.html

To be easy to use and built in.  It makes human readable / editable
.ini - like files.

As for where to store it, I use os.path.expanduser("~") to find the
base directory and a bit of platform specific code.

Something like this snippet

    self.is_windows = sys.platform == 'win32'
    self.home = os.path.expanduser("~")
    if self.is_windows:
        self.config_dir = os.path.join(self.home, "Application Data", self.NAME)
    else:
        self.config_dir = os.path.join(self.home, "."+self.NAME)
    if not os.path.isdir(self.config_dir):
        os.makedirs(self.config_dir, mode=0700)
    self.config_file = os.path.join(self.config_dir, "config")

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From kyosohma at gmail.com  Fri May  2 15:36:16 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 2 May 2008 12:36:16 -0700 (PDT)
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
Message-ID: <2b967e8a-1331-42d7-8059-8c0aac248623@c65g2000hsa.googlegroups.com>

On May 2, 2:15 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> I'm not sure if this is a question about python programming, system
> administration or sockets in general...
> I have the FTP server in my signature to which I'd want to add IPv6
> support.
> My hosting company provides me a common IPv4 address.
> I'd like to set up my workstation (Windows XP or Linux Debian, doesn't
> really matter) to temporarily use IPv6 for trying to add such feature
> to my library (I work on both Windows XP and Linux).
> Could someone point me to some resources describing how could I do
> that?
>
> Thanks in advance.
>
> --- Giampaolohttp://code.google.com/p/pyftpdlib

Quote: "The individual computer systems must be upgraded to support
IPv6 (for example, on Windows XP and Server 2003 systems, IPv6 must be
installed as a Network Component via the Network Connections
Properties dialog box) and your routers must be upgraded to support
IPv6 protocols along with IPv4."

See http://articles.techrepublic.com.com/5100-10878_11-5727015.html

Python's socket module also talks about IPv6 calls here:
http://docs.python.org/lib/module-socket.html

I've never messed with this, so good luck!

Mike


From spamgrinder.trylater at ggmail.com  Fri May  2 22:59:27 2008
From: spamgrinder.trylater at ggmail.com (AlFire)
Date: Fri, 02 May 2008 21:59:27 -0500
Subject: is +=1 thread safe
In-Reply-To: <Xns9A91A511BFF4duncanbooth@127.0.0.1>
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
Message-ID: <481BD50F.5080608@ggmail.com>

Duncan Booth wrote:
[...]
> 
> is equivalent to:
> 
>       x = x.__iadd__(1)

thx all for answers and hints ...

> 
> Generating hundreds of threads is, BTW, a very good way to get poor 
> performance on any system. Don't do that. Create a few threads and put the 
> actions for those threads into a Queue. If you want the threads to execute 
> in parallel investigate using sub-processes.


I know that limitation. However I am bridging to existing software which 
is hard to be changed. and on powerful machine I have at hand it works 
quite fast.

> 
> The threading module already has a function to return the number of Thread 
> objects currently alive.

I have threads within threads - so it does not suit me :-(.

-- 
Andy


From ptmcg at austin.rr.com  Sat May 10 00:04:16 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 9 May 2008 21:04:16 -0700 (PDT)
Subject: regexp help
References: <834d8448-5d6a-4f49-9be6-6501a0b5fd92@k37g2000hsf.googlegroups.com>
	<1cd897aa-0027-4c5b-8bf2-f7c5781df93e@24g2000hsh.googlegroups.com> 
	<4824e3ce$1@news.mel.dft.com.au>
Message-ID: <dd1677bb-de7b-477e-8b63-bf79dc726469@t54g2000hsg.googlegroups.com>

On May 9, 6:52?pm, John Machin <sjmac... at lexicon.net> wrote:
> Paul McGuire wrote:
> > from re import *
>
> Perhaps you intended "import re".

Indeed I did.

> <snip>
>
> > Both print "prince".
>
> No they don't. The result is "NameError: name 're' is not defined".

Dang, now how did that work in my script?  I assure you I did test it
before posting.

Ah!  My pyparsing prototype preceded the regex version in the same
script, and importing the pyparsing module imports re using "import
re".  That is why I didn't get NameError.  Sorry for sloppy posting...

Once you clean up the mistakes, you essentially get the same code as
earlier posted by Matimus.

-- Paul


From deets at nospam.web.de  Tue May  6 06:22:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 12:22:38 +0200
Subject: Confusion regarding the readline module
References: <8c46be09-35bf-429f-b3c7-5c68abbd548b@f24g2000prh.googlegroups.com>
Message-ID: <68aps9F2r9b93U3@mid.uni-berlin.de>

Siddhant wrote:

> Hi!
> I am having some doubts related to the readline module. I hope someone
> could clear them.
> 1. What exactly does the readline.get_line_buffer() function do? Does
> it return whatever is the current input by the user? If yes, then can
> I use it to check the current inputs of the user and base the next-
> word completion against whatever the user has entered so far? There
> wasn't much documentation on it, and a lot of googling couldn't help
> much. :(
> 2. Related to the completer function, what is meant by returning the
> "state"th completion for "text"? Is the completer function called
> everytime (for all possible values of "state") when I press the Tab
> key? When/How is it called?
> 
> Basically, I need to define a completer function, that should take
> into consideration whatever the user has entered so far, and complete
> the next word accordingly. The same way as a "cd /some/file" is
> meaningless.

I don't know anything about readline (beyond it's existence of course) - but
I do know & use the rlcompleter2 module. Go download it and look into it's
source, it should give you an idea how to proceed.

Diez


From itskrithika at gmail.com  Fri May  2 14:44:09 2008
From: itskrithika at gmail.com (terry)
Date: Fri, 2 May 2008 11:44:09 -0700 (PDT)
Subject: Pyserial - send and receive characters through linux serial port
References: <c48920f7-95d0-4cc2-9707-fdbdee836be0@q1g2000prf.googlegroups.com>
	<TNGdnUFnFvv01Y7VnZ2dnUVZ_sytnZ2d@visi>
	<6bb77eb0-9707-4a72-a385-881cb0365b41@r9g2000prd.googlegroups.com>
Message-ID: <743d317e-bd06-42b1-a4fa-399ec18b548b@z24g2000prf.googlegroups.com>

On May 2, 10:26?am, terry <itskrith... at gmail.com> wrote:
> On Apr 26, 8:21?am, Grant Edwards <gra... at visi.com> wrote:
>
>
>
>
>
> > On 2008-04-25, terry <itskrith... at gmail.com> wrote:
>
> > > I am trying to send a character to '/dev/ttyS0' and expect the
> > > same character and upon receipt I want to send another
> > > character. I tired withPyserialbut in vain.
>
> > Pyserialworks. ?I've been using it almost daily for many
> > years. ?Either your program is broken, your serial port is
> > broken, or the device connected to the serial port is broken.
>
> > > Test Set up:
>
> > > 1. Send '%' to serial port and make sure it reached the serial port.
> > > 2. Once confirmed, send another character.
>
> > > I tried with write and read methods inPyserialbut no luck.
>
> > > Can you help?
>
> > Ah yes, the problem is in line 89 of your program.
>
> > We've no way to help if you don't provide details. If you
> > really want help, write as small a program as possible that
> > exhibits the problem. ?I'd like to emphasize _small_. The
> > larger the program the less likely people are to look at it,
> > and the less likely they are to find the problem if they do
> > look at it.
>
> > Much of the time the exercise of writing a small demo program
> > will lead you to the answer. ?If not, then post it, along with
> > the output from the program that shows the problem.
>
> > Then we can tell you what you did wrong.
>
> > --
> > Grant Edwards ? ? ? ? ? ? ? ? ? grante ? ? ? ? ? ? Yow! I'm also against
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? at ? ? ? ? ? ? ? BODY-SURFING!!
> > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?visi.com ? ? ? ? ? ?
>
> Here is the code.
>
> """Open serial connection"""
> ? ? ? ? def openSerialConnection(self,serpt):
> ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
>
> ? ? ? ? ? ? except:
> ? ? ? ? ? ? ? ? self.print_u("Failed to open serial port %s. " %serpt)
>
> ? ? ? ? def enterThroughSerialPort(self,serpt):
> ? ? ? ? ? ? s1 = serial.Serial(serpt,timeout=10)
> ? ? ? ? ? ? ?self.print_u('Sending !!!!..')
> ? ? ? ? ? ? ?while True:
> ? ? ? ? ? ? ? ? s1.write('*')
> ? ? ? ? ? ? ? ?c = s1.read(1)
> ? ? ? ? ? ? ? ?if c:
> ? ? ? ? ? ? ? ? ? self.print_u('Found "*" ')
> ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? print c
> ? ? ? ? ? ? ?s1.write('enter\r')
> ? ? ? ? ? ? ?s1.read('login')
>
> if __name__ == '__main__':
> ? ? serpt = '/dev/ttyS0'
> ? ? x.openSerialConnection(serpt)
> ? ? # funtion to reboot the device goes here ---#
> ? ? x.enterThroughSerialPort(serpt)
>
> After opening the serial connection, the device is rebooted followed
> by sending '*' to serial port and reading back the same. I seem to
> have problem while trying to read '*' back from serial port. First of
> all I am not sure if serial port received the '*'.
>
> Thanks!- Hide quoted text -
>
> - Show quoted text -

This is the err message I received:

c = s1.read(1)
File "/usr/local/lib/python2.5/site-packages/serial/serialposix.py",
line 275, in read
    ready,_,_ = select.select([self.fd],[],[], self._timeout)


From alex.m.gusarov at gmail.com  Thu May 29 03:34:58 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 14:34:58 +0700
Subject: Struct usages in Python
In-Reply-To: <m2bq2q48nu.fsf@googlemail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
	<m2fxs248ty.fsf@googlemail.com> <m2bq2q48nu.fsf@googlemail.com>
Message-ID: <ac6dcb3d0805290034j27030b6cpa9dec03b0dbecbdd@mail.gmail.com>

>
> Yes. That is the somewhat unfortunate difference between new-style and
> old-style classes. Use new-style if you can, and that means that "object"
> must be part of the inheritance graph.
>
...

> You are wrong for Python 2.X, but right for Python 3 where old-style
> classes are gone for good.
>

Thanks, I don't knew it before and it's a sensitive information for me.

--
Best regards, Alex Gusarov
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From sjmachin at lexicon.net  Sat May 24 07:11:17 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 May 2008 11:11:17 GMT
Subject: SQLite import fails sometimes ?
In-Reply-To: <mailman.1520.1211623228.12834.python-list@python.org>
References: <mailman.1520.1211623228.12834.python-list@python.org>
Message-ID: <4837f7d1$1@news.mel.dft.com.au>

Stef Mientki wrote:
> hello,
> 
> The import statement "import sqlite3" gives the error given below.
> In simple programs, the import statement (sometimes) succeed,
> and I can indeed access the database.
> So I guess there is some conflict with another part of my program,
> but as the program is rather large (and dynamic) it's not easy to 
> isolate the problem.
> Does anyone has a clue how to trace this kind of problem ?
> 
> thanks,
> Stef
> 
> Traceback (most recent call last):
>  File "bricks\brick.py", line 322, in Exec
>    self.Generate_Output_Signals ()
>  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
>    import sqlite3
>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>

Is P: a network drive? If not, what is it?
I presume from the fact that the next part of the path is not 
\Python25\Lib that you have not performed a default installation; other 
than the changes to the path name, what else have you done?
What version of Python are you using? What version of Windows?

>    from dbapi2 import *
>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>    from _sqlite3 import *
> ImportError: DLL load failed: Invalid access to memory location.

Looks like the problem could be with your copy of _sqlite3.pyd (pyd == 
Python DLL)

Try why I did below and tell us how far you got.
Cheers,
John

=== try this ===
C:\junk>python
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from _sqlite3 import *
 >>> import _sqlite3
 >>> _sqlite3.__file__
'c:\\python25\\DLLs\\_sqlite3.pyd'
=== end ===


From temmokan at gmail.com  Fri May 23 02:26:09 2008
From: temmokan at gmail.com (Sagari)
Date: Thu, 22 May 2008 23:26:09 -0700 (PDT)
Subject: Calling class method by name passed in variable
Message-ID: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>

Greetings,

Can someone suggest an efficient way of calling method whose name is
passed in a variable?

Given something like:

class X:
#...
  def a(self):
# ...

  def b(self):
# ...

#...

x = X()
#...
v = 'a'

How do I call the method of x  whose name is stored in v?

PHP code for this would be:

class X {
  function a() {
  }
}

$x = new X();
$v = 'a';
$x->$v();

I need a solution for Python. Could you suggest anything?

The task it to call a function whose name is taken from user-supplied
input.

Thanks.


From jarausch at igpm.rwth-aachen.de  Tue May 20 06:18:52 2008
From: jarausch at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Tue, 20 May 2008 12:18:52 +0200
Subject: subprocess - please enhance the documentation
Message-ID: <69fmseF329s6vU1@mid.dfncis.de>

Hi,

I'd like to suggest to add a few lines to chapter 17.1.3.5 "Replacing os.popen" 
(Python Doc 2.5.2)

I have used the following code in the past

ARC='MyDumpFile'
tar_inp= os.popen('/bin/tar cjf '+ARC+' -T -','w')
....
tar_exit_code= tar_inp.close()
if  tar_exit_code != None and tar_exit_code % 256 :
   print "some error messages"

When replacing this - as suggested - by

TAR= Popen(('/bin/tar','cjf',ARC,'-T','-'),stdin=PIPE)
tar_inp= TAR.stdin
....
tar_inp.close() always returns None.

So I have replaced this by

tar_inp.close()
tar_exit_code= TAR.wait()

if  tar_exit_code != 0 :
   print "some error messages"


Perhaps a few lines telling about this would be helpful.

Thanks,
Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From inq1ltd at inqvista.com  Sun May 25 12:20:29 2008
From: inq1ltd at inqvista.com (jim-on-linux)
Date: Sun, 25 May 2008 12:20:29 -0400
Subject: finding icons for Apps
In-Reply-To: <48397ABE.2070006@codebykevin.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
	<48397ABE.2070006@codebykevin.com>
Message-ID: <200805251220.29847.inq1ltd@inqvista.com>


Learn how to use Gimp, 

Make your own icons, of and from anything. 
You can use screen shots and picks from 
anywhere. Import your own photos and modify 
any pic however you want. Check them out, 
free download, tutorial. 

http://www.gimp.org

jim-on-linux
http://www.inqvista.com


> Sanoski wrote:
> > This might be a dumb question. I don't
> > know. I'm new to all this. How do you
> > find icons for your programs? All GUI
> > applications have cool icons that
> > represent various things. For instance,
> > to save is often represented as a disk,
> > etc. You know, the small little picture
> > references that give meaning to the
> > phrase 'Graphical User Interface'. But
> > I'm not a graphics artist! Drawing is
> > simply one talent that skipped me
> > completely. Where can I find icons to
> > use with my programs?
> >
> > I don't even know how to search for
> > them, because I'm not sure how to word
> > it. I tried Googling various things:
> > icons, software graphics, application
> > icons, custom graphics, etc, etc. But
> > I'm not getting much luck here you guys.
> >
> > Also, besides just finding a collection
> > of various pre-made icons, who would I
> > talk to to make me some original custom
> > made icons? I'll look for hours and find
> > one or two places, but they never
> > respond to my messages, so I figure they
> > must not do that kind of art work.
> >
> > I'm looking for both: a collection of
> > graphics and some place (or someone)
> > that can make custom original graphics.
> > The latter is just for future reference.
> > The more important one is the former,
> > because I can't even afford to pay for
> > originals right now. But maybe I will
> > soon, so it would be nice to have a
> > resource.
> >
> > Thanks in advance,
> > Joshua
>
> http://tango.freedesktop.org/Tango_Desktop
>_Project http://www.oxygen-icons.org/
> http://everaldo.com/crystal/


From s0suk3 at gmail.com  Sat May  3 12:58:49 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Sat, 3 May 2008 09:58:49 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
	<7334e775-e9c2-473f-96b5-138efaf9bf5b@x35g2000hsb.googlegroups.com>
Message-ID: <86694f9f-5d8e-4db7-a524-b875e51ce22e@e39g2000hsf.googlegroups.com>

On May 2, 3:26 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 2, 2:49 pm, Jeff <jeffo... at gmail.com> wrote:
>
> > The generally used idiom for that is:
>
> > lst = ['a', 'b', 'c']
> > if 'a' in lst:
> >   foo = lst.index('a')
>
> Jeff - Gracias !!
>
> I am fairly new to python. Thanks for the example code snippet above.
> It is the same amount of code as receiving -1 and then checking for
> doing an "if else" for -1 so now i don't feel bad. But, being new to
> this paradigm, raising of an exception when it can't find the element
> appears to be weird to me for some unexplainable reason.

I don't know how Python looks up internally 'a' in the list in the
statement "if 'a' in lst: ... ," but just from common sense, I think
it would have to do the work of finding it twice, first in the
statement "'a' in lst," and then in the statement "lst.index('a')." If
you had a lot of elements in the list, and/or you were looping a lot
of times to find a lot of things, it'd be better to do the try/except
form.


From martin at v.loewis.de  Sun May 25 16:06:16 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 22:06:16 +0200
Subject: Unicode lists and join (python 2.2.3)
In-Reply-To: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>
References: <f51f9299-b27c-4379-865f-d88e87ae0071@l28g2000prd.googlegroups.com>
Message-ID: <4839c6b8$0$21455$9b622d9e@news.freenet.de>

>     x = [u"\xeeabc2:xyz", u"abc3:123"]
>     u = "\xe7abc"

u is not a Unicode string.

>     x.append("%s:%s" % ("xfasfs", u))

so what you append is not a Unicode string, either.

>     x.append(u"Hello:afddfdsfa")
> 
>     y = u'\n'.join(x)

As a consequence, .join tries to convert the byte string to
a Unicode string, and fails, because it contains non-ASCII
bytes.

> Why does this work with no exceptions
> 
>     x=[]
>     u = "\xe7abc"
>     x.append("%s:%s" % ("xfasfs", u))

% here is applied to a byte string, with all arguments also byte
strings. The result is a byte string.
> 
> and this doesnt
>     x=[]
>     u = "\xe7abc"
>     x.append("%s:%s" % (u"xfasfs", u))

% is applied to a byte string, with one argument being a Unicode
string. The result is a Unicode string, where all byte strings
get converted to Unicode. Converting u fails, as it has non-ASCII
bytes in it.

Regards,
Martin


From nagle at animats.com  Wed May 21 22:36:30 2008
From: nagle at animats.com (John Nagle)
Date: Wed, 21 May 2008 19:36:30 -0700
Subject: How do I know when all threads are done?
In-Reply-To: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
References: <8c247196-1f09-4cf3-8adb-1d9bdbdf4682@q24g2000prf.googlegroups.com>
Message-ID: <4834d8d1$0$34551$742ec2ed@news.sonic.net>

Zerge wrote:
> I can launch threads just fine, but then I have to do a time.sleep(n)
> so the main thread from which they where launched will wait for all
> the threads to return.
> 
> How can I detect when all threads are done and then return control to
> the main threads?
> 
> Thanks for your help

     Use "join".

				John Nagle


From inhahe at gmail.com  Fri May 16 23:09:20 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 23:09:20 -0400
Subject: help compiling Python on vs 2008!
Message-ID: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>

In order to compile Python, I need to compile 7 external libraries manually 
that don't come with Python, the first being tcl. I'm compiling on VS 2008. 
Since the Python source doesn't have a PCBuild9 directory, I'm using the 
PCBuild8 directory. When following readme.txt to a T, tcl won't compile. 
First it gave me an error because an environment variable wasn't set, so I 
dug in and found out what needs to be set (MSDEVDIR, MSVCDIR, or MSSDK) and 
set it. Not that I know what it needs to be set to, but I made a good guess 
based on some google searches. Now I don't get that error, but I get a 
truckload of C errors when compiling.
Here's the first one, or actually, all the output up to and including the 
first C error:

Microsoft (R) Program Maintenance Utility Version 9.00.21022.08
Copyright (C) Microsoft Corporation. All rights reserved.

===============================================================================
*** Compiler has 'Optimizations'
*** Compiler has 'Pentium 0x0f fix'
*** Linker has 'Win98 alignment problem'
*** Intermediate directory will be '.\Release\tcl_Dynamic'
*** Output directory will be '.\Release'
*** Suffix for binaries will be ''
*** Optional defines are ''
*** Dependency rules are not being used.

cl -nologo -c -W3 -YX -Fp.\Release\tcl_Dynamic\ -QI0f -O2 -Op -Gs -MD -I
"..\win" -I"..\generic" -DTCL_PIPE_DLL=\"tclpip84.dll\" -DBUILD_tcl -Fo.\Relea
se\tcl_Dynamic\ @E:\Users\ADMINI~1\AppData\Local\Temp\nmD926.tmp
cl : Command line warning D9002 : ignoring unknown option '-YX'
cl : Command line warning D9002 : ignoring unknown option '-QI0f'
cl : Command line warning D9002 : ignoring unknown option '-Op'
regerror.c
..\generic\regerror.c(53) : warning C4996: 'errcode': This name was 
supported du
ring some Whidbey pre-releases. Instead, use the standard name errno_t.
C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\crtdefs.h(548) :
see declaration of 'errcode'
..\generic\regerror.c(53) : error C2081: 'preg' : name in formal parameter 
list
illegal


what is going on here, and how do I compile these external libraries? 




From banibrata.dutta at gmail.com  Fri May  9 06:58:33 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 9 May 2008 16:28:33 +0530
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
Message-ID: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>

Hi,

I already have Python25, and need to install Python24. I would prefer not to
remove Python25, but each Python version seems to update the registry, I
guess (not sure), overwriting each other's entries. Any way to have both
versions ?

-- 
regards,
Bani
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From upton at virginia.edu  Thu May 22 15:06:01 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 22 May 2008 15:06:01 -0400
Subject: Why is math.pi slightly wrong?
In-Reply-To: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
References: <mailman.1476.1211475183.12834.python-list@python.org>
	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805221206m452a73f8q1b08e2d15e58cfb2@mail.gmail.com>

On Thu, May 22, 2008 at 2:53 PM, Mensanator <mensanator at aol.com> wrote:
> On May 22, 11:32 am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
>> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>>
>> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?
>
> If you actually need that many digits, use a different library.
>
>>>> import gmpy
>
>>>> print gmpy.pi(64) # 64 bit precision
> 3.14159265358979323846
>>>> print gmpy.pi(128) # 128 bit precision
> 3.141592653589793238462643383279502884197
>>>> print gmpy.pi(16384) # 16384 bit precision
> 3.14159265358979323846264338327950288419716939937510582097494459
> 2307816406286208998628034825342117067982148086513282306647093844
> 6095505822317253594081284811174502841027019385211055596446229489
> 5493038196442881097566593344612847564823378678316527120190914564
> 8566923460348610454326648213393607260249141273724587006606315588
> 1748815209209628292540917153643678925903600113305305488204665213
> 8414695194151160943305727036575959195309218611738193261179310511
> 8548074462379962749567351885752724891227938183011949129833673362
> 4406566430860213949463952247371907021798609437027705392171762931
> 7675238467481846766940513200056812714526356082778577134275778960
> 9173637178721468440901224953430146549585371050792279689258923542
> 0199561121290219608640344181598136297747713099605187072113499999
> 9837297804995105973173281609631859502445945534690830264252230825
> 3344685035261931188171010003137838752886587533208381420617177669
> 1473035982534904287554687311595628638823537875937519577818577805
> 3217122680661300192787661119590921642019893809525720106548586327
> 8865936153381827968230301952035301852968995773622599413891249721
> 7752834791315155748572424541506959508295331168617278558890750983
> 8175463746493931925506040092770167113900984882401285836160356370
> 7660104710181942955596198946767837449448255379774726847104047534
> 6462080466842590694912933136770289891521047521620569660240580381
> 5019351125338243003558764024749647326391419927260426992279678235
> 4781636009341721641219924586315030286182974555706749838505494588
> 5869269956909272107975093029553211653449872027559602364806654991
> 1988183479775356636980742654252786255181841757467289097777279380
> 0081647060016145249192173217214772350141441973568548161361157352
> 5521334757418494684385233239073941433345477624168625189835694855
> 6209921922218427255025425688767179049460165346680498862723279178
> 6085784383827967976681454100953883786360950680064225125205117392
> 9848960841284886269456042419652850222106611863067442786220391949
> 4504712371378696095636437191728746776465757396241389086583264599
> 5813390478027590099465764078951269468398352595709825822620522489
> 4077267194782684826014769909026401363944374553050682034962524517
> 4939965143142980919065925093722169646151570985838741059788595977
> 2975498930161753928468138268683868942774155991855925245953959431
> 0499725246808459872736446958486538367362226260991246080512438843
> 9045124413654976278079771569143599770012961608944169486855584840
> 6353422072225828488648158456028506016842739452267467678895252138
> 5225499546667278239864565961163548862305774564980355936345681743
> 2411251507606947945109659609402522887971089314566913686722874894
> 0560101503308617928680920874760917824938589009714909675985261365
> 5497818931297848216829989487226588048575640142704775551323796414
> 5152374623436454285844479526586782105114135473573952311342716610
> 2135969536231442952484937187110145765403590279934403742007310578
> 5390621983874478084784896833214457138687519435064302184531910484
> 8100537061468067491927819119793995206141966342875444064374512371
> 8192179998391015919561814675142691239748940907186494231961567945
> 2080951465502252316038819301420937621378559566389377870830390697
> 9207734672218256259966150142150306803844773454920260541466592520
> 1497442850732518666002132434088190710486331734649651453905796268
> 5610055081066587969981635747363840525714591028970641401109712062
> 8043903975951567715770042033786993600723055876317635942187312514
> 7120532928191826186125867321579198414848829164470609575270695722
> 0917567116722910981690915280173506712748583222871835209353965725
> 1210835791513698820914442100675103346711031412671113699086585163
> 9831501970165151168517143765761835155650884909989859982387345528
> 3316355076479185358932261854896321329330898570642046752590709154
> 8141654985946163718027098199430992448895757128289059232332609729
> 9712084433573265489382391193259746366730583604142813883032038249
> 0375898524374417029132765618093773444030707469211201913020330380
> 1976211011004492932151608424448596376698389522868478312355265821
> 3144957685726243344189303968642624341077322697802807318915441101
> 0446823252716201052652272111660396665573092547110557853763466820
> 6531098965269186205647693125705863566201855810072936065987648611
> 7910453348850346113657686753249441668039626579787718556084552965
> 4126654085306143444318586769751456614068007002378776591344017127
> 4947042056223053899456131407112700040785473326993908145466464588
> 0797270826683063432858785698305235808933065757406795457163775254
> 2021149557615814002501262285941302164715509792592309907965473761
> 2551765675135751782966645477917450112996148903046399471329621073
> 4043751895735961458901938971311179042978285647503203198691514028
> 7080859904801094121472213179476477726224142548545403321571853061
> 4228813758504306332175182979866223717215916077166925474873898665
> 4949450114654062843366393790039769265672146385306736096571209180
> 7638327166416274888800786925602902284721040317211860820419000422
> 9661711963779213375751149595015660496318629472654736425230817703
> 6751590673502350728354056704038674351362222477158915049530984448
> 9333097

Who wants to verify that that's correct to that many digits? ;)


From wizzardx at gmail.com  Sun May  4 05:45:09 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 11:45:09 +0200
Subject: Fw: Script Optimization
In-Reply-To: <2dc977e3-4a4d-43f7-b56a-3d51f9a1be8a@w1g2000prd.googlegroups.com>
References: <6ed749de-1a7d-4db5-a229-d3400da4d24b@f24g2000prh.googlegroups.com>
	<mailman.517.1209886388.12834.python-list@python.org>
	<2dc977e3-4a4d-43f7-b56a-3d51f9a1be8a@w1g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040245s3f403183mde712a09d113ce7b@mail.gmail.com>

Forwarding back to the list.

---------- Forwarded message ----------
From: lev <levlozhkin at gmail.com>
Date: Sun, May 4, 2008 at 10:21 AM
Subject: Re: Script Optimization
To: David <wizzardx at gmail.com>


On May 4, 12:32 am, David <wizza... at gmail.com> wrote:
 > >  It's too long to post here (160 lines) so here's the link:
 > >  http://uppit.com/d2/CKOYHE/af78a6beeeed3e21a19d5871abb9b879/utils.py
 > >  (if that doesn't work:http://uppit.com/CKOYHE)
 >
 > >  Thanks in advance,
 > >  lev
 >

> Neither link works for me. I get an error page "Error: invalid
 > download linnk". How about you send it to the list as an attachment?
 >
 > David.

 Sorry.. but I don't know how to send an attachment here... I am not
 using a dedicated email client, just google groups, and the option
 seems to elude me.
 I forgot to comment it when I was writing it.... I am working on
 commenting it and making it more readable, and I'll post that tomorrow
 (I'm going to sleep... it's 2 in the morning)
 This is a bit long, sorry:

 #!/usr/bin/env python

 def main():
        from sys import argv
        from optparse import OptionParser
        from os import chdir,path
        fullpath = path.abspath(path.dirname(argv[0]))
        chdir(fullpath[:-10])
        checksums = '%s//checksums.md5' % fullpath
        newdirname = ('string1', 'string2', 'string3', 'string4')
        usage = "%prog [options]"
        parser = OptionParser(usage)
        parser.add_option('-c', '--check', action='store_true', dest='check',
 help = 'verify checksums')
        parser.add_option('-r', '--rename', action='store_true',
 dest='rename', help = 'rename files to a more usable form (write
 rights needed)')
        (options, args) = parser.parse_args()
        if options.check:
                check(checksums)
                chdir(fullpath)
                pass
        if options.rename:
                chdir('..')
                rename(newdirname, checksums)
                pass
        if not options.check and not options.rename:
                parser.print_help()
                pass
        return

 def check(checksums):
        checksums = open(checksums, 'r')
        chgfiles = {}
        msngfiles = []
        for fline in checksums.readlines():
                line = fline.split(' *')
                orig = line[0].upper()
                try:
                        file = open(line[1].strip(),'rb')
                        import md5
                        chunk = 8196
                        sum = md5.new()
                        while(1):
                                chunkdata = file.read(chunk)
                                if not chunkdata:
                                        break
                                sum.update(chunkdata)
                                pass
                        new = sum.hexdigest().upper()
                        file.close()
                        if  new == orig:
                                print '.',
                                pass
                        else:
                                chgfiles[line[1]] = (orig,new)
                                pass
                except IOError:
                        msngfiles.append(line[1])
                        pass
                pass
        checksums.close()
        chgfileskeys = chgfiles.keys()
        chgfileskeys.sort()
        msngfiles.sort()
        print '\n'
        if len(chgfiles) != 0:
                print 'Files changed:'
                for key in chgfileskeys:
                        print key.strip('\n'),'changed
from:\n\t',chgfiles[key][0],'to\n
 \t',chgfiles[key][1]
                        pass
                print '\n\t',len(chgfiles),'file(s) changed.\n'
                pass
        if len(msngfiles) != 0:
                print 'Files not found:'
                for x in range(len(msngfiles)):
                        print '\t',msngfiles[x]
                        pass
                print '\n\t', len(msngfiles),'file(s) not found.\n'
                pass
        print "\n\tChecksums Verified\n"
        return

 def rename(newdirname, checksums):
        from os import chdir, rename
        from glob import glob
        dict = md5format(checksums)
        dirlist = glob('./00[1-4]string [1-4]')
        dirlist.sort()
        for x in range(4):
                rename(dirlist[x],newdirname[x])
                print '\t',dirlist[x],'renamed to:',newdirname[x]
                chdir('./%s' % newdirname[x])
                for oldfilename in glob('*.mp3'):
                        newfilename = oldfilename[3:]
                        rename(oldfilename,newfilename)
                        print '\t\t',oldfilename,'renamed to:',newfilename
                        pass
                dict = md5fname_edit(dict,dirlist[x],newdirname[x])
                pass
                chdir('..')
        md5write(dict, checksums)
        replace('Webpage.htm', dirlist, newdirname)
        print '\n\tDirectories and Files renamed.'
        return

 def md5format(checksums):
        dict = {}
        checksums = open(checksums, 'r')
        for line in checksums.readlines():
                splitline = line.split(' *')
                dict[splitline[1]] = (splitline[0],splitline[1].split('\\'))
                pass
        checksums.close()
        return dict

 def md5fname_edit(dict, olddir, newdir):
        for x in dict.keys():
                if dict[x][1][0] == olddir[2:]:
                        dict[x] =(dict[x][0],[newdir,dict[x][1][1]])
                        if dict[x][1][1][0] == '0':
                                dict[x]
=(dict[x][0],[dict[x][1][0],dict[x][1][1][3:]])
                                pass
                        pass
                pass
        return dict

 def md5write(dict, checksums):
        keys = dict.keys()
        keys.sort()
        checksums = open(checksums, 'w')
        for x in keys:
                try:
                        checksums.writelines('%s *%s/%s' %
(dict[x][0],dict[x][1][0],dict[x]
 [1][1]))
                        pass
                except IndexError:
                        checksums.writelines('%s *%s' %
(dict[x][0],dict[x][1][0]))
                        pass
                pass
        return

 def replace(file, oldlist, newlist):
        from os import remove
        new = open(file,'r').read()
        for x in range(4):
                new = new.replace(oldlist[x][2:],newlist[x],1)
                pass
        remove(file)
        file = open(file,'w', len(new))
        file.write(new)
        return

 if __name__ == '__main__':
        main()

 Thanks in advance,
 lev


From larzluv at hotmail.com  Sun May 11 20:12:07 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Sun, 11 May 2008 17:12:07 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<mailman.942.1210523706.12834.python-list@python.org>
Message-ID: <6d6c1048-4483-417e-a40c-2af77de9ab2d@c58g2000hsc.googlegroups.com>

(quoted text below my reply)

THANK YOU SO MUCH, Michael!

Criminitly!  Figures!  HA!  I had it the WHOLE TIME, but didn't
realize it!  ;)  (As mentioned, I had FILE installed from GnuWin32.)
DUH!  I just neglected to do a search for "magic1.dll"... the most
obvious of the obvious!

I copied it from C:\Program Files\GnuWin32\bin\magic1.dll to C:
\Program Files\python25\libs.

Imports fine now.  (I'll *test* it later.  Then write-up my HowTo... I
think I'll even see if I can make an EGG for others... SOUNDS "easy"
with EasyInstall [http://peak.telecommunity.com/DevCenter/
EasyInstall]...  I'll -see-...  :) )

Ah, sometimes one CAN'T see the forest for the trees; a few hours
hacking away at getting things going to THIS point will do it to ya...
err, or at least "to me"!  :D


Thanks, again, Michael...
-Larry



On May 11, 11:34 am, Michael Torrie <torr... at gmail.com> wrote:
> Larry Hale wrote:
> > Now I *presume* my problem (at this point) is that I need to have
> > libmagic named as "magic1.dll" -wherever- this module is looking for
> > it.  I'm just not sure, let alone if this is true, WHERE Python/
> > modules expect to find such things.
>
> > Also, which version(s)/file(s) should be placed where, or...??
>
> The dll you are looking for is here:
>
> http://downloads.sourceforge.net/gnuwin32/file-4.21-bin.zip?modtime=1...
>
> The .dll.a file you mention is just a linker stub for when you want to
> compile against it (as you are doing when building python-magic).
>
> The magic1.dll file in the file-4.21-bin.zip package should be placed
> anywhere in the path.  Since you'll be using it with python, you could
> probably stick it in the python25/bin folder (where ever your python
> system is installed).



From eduardo.padoan at gmail.com  Thu May  8 08:57:03 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Thu, 8 May 2008 09:57:03 -0300
Subject: Newbie to python --- why should i learn !
In-Reply-To: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <dea92f560805080557o6d1c14eiae12e172867d54d9@mail.gmail.com>

On Thu, May 8, 2008 at 7:25 AM, Raxit at MyKavita.com
<raxitsheth2000 at gmail.com> wrote:
> Hi,
>
>  i was reading/learning some hello world program in python.
>  I think its very simillar to Java/C++/C#. What's different (except
>  syntax) ?
>
>  what can i do easily with python which is not easy in c++/java !?

Programming in a pure duck typing style
http://en.wikipedia.org/wiki/Duck_typing

>  Tnx,
>  Raxit
>  www.mykavita.com
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>



-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From yves at zioup.com  Fri May 23 10:23:28 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Fri, 23 May 2008 14:23:28 GMT
Subject: Producing multiple items in a list comprehension
References: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>
	<g14gkp$gs2$01$1@news.t-online.com>
	<NisZj.288476$pM4.73650@pd7urf1no>
	<g15q3v$fdp$02$1@news.t-online.com>
Message-ID: <ArAZj.161276$Cj7.147288@pd7urf2no>

Peter Otten <__peter__ at web.de> wrote:

> The speed gain is significant. Why should I throw away useful information if
> I have it? 

My thinking was that it wasn't generic enough, and I was looking for a
solution that would work for more generic problem. I agree, I shouldn't
have used the world "elegant" here, more generic would have been better.

> I'd even be willing to convert one arbitrary iterable to a list
> to get the length information.

> $ python -m timeit -s"a = [1,2,3]*100; b = [4,5,6]*100" "aa = list(a);
> items=[None]*(2*len(aa)); items[::2] = aa; items[1::2] = b"
> 10000 loops, best of 3: 29.5 usec per loop

Yes, I like that, it is as generic as the reduce one.


> are more complicated than elegant. Not recommended.

You proved your point. Every book and webpage out there says that
functional solutions are faster than loops, that's why I tried hard not
to use a loop, and "reduce" is considered functional - I should have
timed it.


Yves.
http://www.SollerS.ca



From deets at nospam.web.de  Wed May 28 13:46:16 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 19:46:16 +0200
Subject: Struct usages in Python
In-Reply-To: <mailman.1696.1211996106.12834.python-list@python.org>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>	<1211985562.3335.18.camel@aalcdl07.lib.unc.edu>
	<mailman.1696.1211996106.12834.python-list@python.org>
Message-ID: <6a5k3dF36cq8mU1@mid.uni-berlin.de>

Alex Gusarov schrieb:
>>  class Event(object):
>>
>> Always subclass object, unless you have a very compelling reason not to,
>> or you are subclassing something else.
>>
> 
> I've thought that if I write
> 
> class Event:
>     pass
> 
> , it'll be subclass of object too, I was wrong?


Yes. That is the somewhat unfortunate difference between new-style and 
old-style classes. Use new-style if you can, and that means that 
"object" must be part of the inheritance graph.

http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html

Diez


From kib2 at free.fr  Sat May 24 10:41:26 2008
From: kib2 at free.fr (kib)
Date: Sat, 24 May 2008 16:41:26 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <69qmhcF33pou1U1@mid.uni-berlin.de>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
Message-ID: <48382917$0$20800$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> Tool69 schrieb:
>> Hi,
>>
>> Until now, I was running my own static site with Python, but I'm in
>> need of dynamism.
>>
>> After reading some cgi tutorials, I saw Joe Gregorio's old article
>> "Why so many Python web frameworks?" about wsgi apps [http://
>> bitworking.org/news/Why_so_many_Python_web_frameworks] and have a
>> question about it. The code he gave works like a charm (I had to make
>> a little change because SQLAlchemy has changed since), but how the
>> hell can I serve static files (css, js, images, etc.) within an wsgi
>> app, ie inside a '/static' directory ?!
> 
> There is a wsgi-app out there that is called "static". Use that.
> 
> And it's the first hit on google "wsgi static"... :)
> 
> http://lukearno.com/projects/static/
> 
> Diez

Hi Diez,

and thanks for yout help. In fact I already found it but never managed 
to get it work because the static doc says :

from wsgiref.simple_server import make_server
import static
make_server('localhost', 9999, static.Cling('/var/www')).serve_forever()

and inside J.Gregorio's tutorial it is:

from wsgiref.simple_server import WSGIServer, WSGIRequestHandler
httpd = WSGIServer(('localhost', 8080), WSGIRequestHandler)
httpd.set_app(urls.urls)

It does not use 'make_server()' so how can I adapt it ?

I finally managed to work with static files with a little hack, but it's 
ugly because I'm reading each static file per request.

Kib.


From dmitrey.kroshko at scipy.org  Fri May  9 06:04:14 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:04:14 -0700 (PDT)
Subject: simple question about Python list
Message-ID: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>

hi all,
suppose I have 2 lists
list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
and
list2 = [0, 2, 4] # integer elements

howto (I mean most simple recipe, of course) form list3 that contains
elements from list1 with indexes from list2, i.e.

list3 = ['elem0', 'elem2', 'elem4']?

Thank you in advance, D.


From pavlovevidence at gmail.com  Wed May 21 17:13:15 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 21 May 2008 14:13:15 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <a7ae43da-7ce4-44e5-827e-db3289e0ddf6@e39g2000hsf.googlegroups.com>

On May 21, 4:10 pm, notbob <not... at nothome.com> wrote:
> Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.

Ha, exactly the opposite here.

> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?

If you just want to write a simple blog, PHP is probably good enough.
It's undeniably easier to jump into web programming with PHP--
partially because of it's widespread support and straightforward
usage, partially because Python web solutions tend to aim for
separability of content and presenation which raises the bar for
entry--and that could easily outweigh your concerns over quality of
the language.

(Incidentally: if you didn't want to start a religious war, it would
have been better if you had posted it separately to the two groups.
Lots of flamewars start by one person posting a cutdown not intended
for the ears of the other group.)


Carl Banks


From iainking at gmail.com  Tue May 13 08:41:25 2008
From: iainking at gmail.com (Iain King)
Date: Tue, 13 May 2008 05:41:25 -0700 (PDT)
Subject: wxpython dialog - do something after ShowModal()?
Message-ID: <a14c2400-e88b-4d90-80bb-a5fe27fedea3@m44g2000hsc.googlegroups.com>

Hi.  I have a modal dialog whcih has a "Browse..." button which pops
up a file selector.  This all works fine, but the first thing the user
has to do when they open the dialog is select a file, so I would like
the dialog to automatically call the onBrowse function as soon as the
dialog opens.  However, I don't know how to do this.

dlg.ShowModal()
onBrowse()

obviously doesn't work, and neither does the reverse.  I was hoping
that the dialog would throw some kind of "I have been shown" event,
but it doesn't (as far as I can tell).  How do I make the dialog do
something as soon as it's been shown?

Iain


From kay.schluehr at gmx.net  Sat May 10 09:41:36 2008
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 10 May 2008 06:41:36 -0700 (PDT)
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <ef9aee02-661f-4556-b0b7-76434f57ca55@m36g2000hse.googlegroups.com>

On 10 Mai, 07:52, "xah... at gmail.com" <xah... at gmail.com> wrote:
> In the past weeks i've been thinking over the problem on the practical
> problems of regex in its matching power. For example, often it can't
> be used to match anything of nested nature, even the most simple
> nesting. It can't be used to match any simple grammar expressed by
> BNF. Some rather very regular and simple languages such as XML, or
> even url, email address, are not specified as a regex.

Well formed XML cannot be fully specified within BNF as well because
it is context sensitive: in order to recognize a tag/endtag pair one
has to maintain a stack. That's not a big deal in practice if one
wants to write an XML parser but one can't use an arbitrary LL or LR
parser generator to produce a parse tree representing the XML.



From http  Sun May 11 02:32:35 2008
From: http (Paul Rubin)
Date: 10 May 2008 23:32:35 -0700
Subject: Keeping two lists aligned after processing
References: <823470c7-4c15-4653-8c51-7ab83acc9221@m36g2000hse.googlegroups.com>
Message-ID: <7xbq3dfj0c.fsf@ruckus.brouhaha.com>

philly_bob <b0bm00r3 at gmail.com> writes:
> algs=['AlgA', 'AlgB', 'AlgC', 'AlgD', 'AlgE']
> accs=[]
> for alg in algs:
>    thisacc=getattr(alg.accuracy)()   # picked this technique on
> comp.lang.python last month
>    accs.append(thisacc)

I think what you mean is (untested):

     algs = [AlgA, AlgB, AlgC, AlgD, AlgE]
     accs = sorted(((alg.accuracy(), alg.name()) for alg in algs),
                   reverse=True)
     for i,(alg_acc, alg_name) in enumerate(accs):
        print '%2d %5s %0.2f'% (i, alg_name, alg_acc)

This assumes a method alg.name() which tells you the name of the
algorithm.  I don't understand how you're converting the string 'AlgA'
to an algorithm object in your example above.


From benjamin.kaplan at case.edu  Fri May 16 17:01:08 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 16 May 2008 17:01:08 -0400
Subject: IDE for Python
In-Reply-To: <g0kpjo$5hd$1@ger.gmane.org>
References: <a5f55f2f0805160833lb735c30wd653103801fef420@mail.gmail.com>
	<g0kpjo$5hd$1@ger.gmane.org>
Message-ID: <ec96e1390805161401m292c2e84ic24f670cd844aa04@mail.gmail.com>

On Fri, May 16, 2008 at 4:08 PM, Joshua Kugler <jkugler at bigfoot.com> wrote:

> Jonathan Barbero wrote:
> >  I?m newbie with Python and to learn it better I want to use a good IDE
> to
> > concentrate on Python power. There is any IDE like Eclipse for Java for
> > Python? If not, what is the best Python?s IDE for you?
>
> This is an EFAQ (extremely frequently asked question).
>
>
> http://www.google.com/search?hl=en&q=python+ide+site%3Amail.python.org%2Fpipermail%2Fpython-list%2F&btnG=Google+Search
>
> j
>
There is also the python wiki page that lists dozens of editors.

http://wiki.python.org/moin/PythonEditors


>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bignose+hates-spam at benfinney.id.au  Sat May 10 03:51:53 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 10 May 2008 17:51:53 +1000
Subject: Find more than one error at once
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <87d4nua95y.fsf@benfinney.id.au>

Joseph Turian <turian at gmail.com> writes:

> Is it possible to coax python to find more than one error at once?

Definitely, write unit tests and run the whole suite
<URL:http://www.python.org/doc/lib/module-unittest>. All errors found
by your unit test suite will be reported.

If you mean the Python parser and compiler, then the answer to this is
in the Zen of Python: "In the face of ambiguity, refuse the temptation
to guess". An error in parsing or compiling leaves no clear
unambiguous path for finding further parsing or compilation errors.

-- 
 \          "It's a good thing we have gravity or else when birds died |
  `\             they'd just stay right up there. Hunters would be all |
_o__)                                     confused."  -- Steven Wright |
Ben Finney


From kyrie at uh.cu  Wed May 14 16:03:05 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Wed, 14 May 2008 16:03:05 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com>
Message-ID: <200805141603.05465.kyrie@uh.cu>

On Tuesday 13 May 2008 01:05:38 pm Dave Parker wrote:
> The websites owners might not be unhappy, but lots of customers
> complain about slow websites, so if the market is competitive then
> eventually the PHP fad will die out.

On my [modest] experience, bandwidth trumps code speed by a large fraction. My 
experience is tainted, though, with me living in Cuba and Cuba having almost 
no bandwidth available.

> For example, Slashdot recently interviewed a successful website in a
> competitive market -- online newspapers -- and found that to enhance
> customer happiness the New York Times uses hand-coded HTML.
>
> "He was asked how the Web site looks so consistently nice and polished
> no matter which browser or resolution is used to access it. His answer
> begins: 'It's our preference to use a text editor, like HomeSite,
> TextPad or TextMate, to "hand code" everything, rather than to use a
> wysiwyg (what you see is what you get) HTML and CSS authoring program,
> like Dreamweaver. We just find it yields better and faster results.'"

So, they edit the HTML code by hand. The interview explicitly mentions the 
features "consistently nice and polished", not "faster to compute". You can 
always throw more hardware when the problem is about speed. The real edge on 
your competitive marked should be the "consistently nice and polished", and 
neither python, nor [I hope] Flaming Thunder is going to help you with that.

> "Faster" wins in a competitive market, so if a programming language
> can't deliver "faster", it is a fad that will die out.

I find it more likely that the users are more concerned about how quickly the 
latest tidbit reaches your frontpage than with the extra few milisenconds 
achieved by switching the programming language or throwing another server in 
the cluster.


-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matem?tica y Computaci?n, UH.
http://profesores.matcom.uh.cu/~kyrie


From onsen-neko at gmx.net  Fri May  9 15:53:03 2008
From: onsen-neko at gmx.net (Daniel Marcel Eichler)
Date: Fri, 9 May 2008 21:53:03 +0200
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <48240921$0$7184$426a74cc@news.free.fr>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
	<48240921$0$7184$426a74cc@news.free.fr>
Message-ID: <200805092153.03769.onsen-neko@gmx.net>

Am Freitag 09 Mai 2008 10:19:45 schrieb Bruno Desthuilliers:

> >> very often sees do-nothing catch-all try/catch blocks in Java -
> >> which is way worse than just letting the exception propagate. I
> >> find all this totally pointless, because there's just no way for a
> >> compiler to check if your code is logically correct.
> >
> > But it's enough if the called method exists and returns the correct
> > type. At least it prevents a crash.
>
> Then providing an appropriate default in the base class is enough
> too.

Only working *if* there is a base-class, and not only convention for 
should-have-methods.

> >>> That's the point. Interfaces garantee that a duck is a duck, an
> >>> not only a chicken that quack.
> >>
> >> Who cares if it's a chicken as long as it quacks when you ask her
> >> to ? Now *This* is the whole point of chicken^Mduck typing, isn't
> >> it ?-)
> >
> > Ducks can also swim and fly.  And if you need a really duck,
>
> If you're code expects something that quacks, swims and flies,
> anything that quacks, swims and flies is ok. You just don't care if
> it's a duck or a flying whale with a quacking device tied to it.

Not the point.

> > Of course, in the practical world that all doesn't  matter. But in
> > the theoretical world of the big coding farms, called business,
> > that's one cornerstone of success, in the tinking of managers and
> > so.
>
> Sorry, I live in a very practical world - and we're by no mean
> running out of business here...

Like i said.


From banibrata.dutta at gmail.com  Fri May 16 10:36:01 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Fri, 16 May 2008 20:06:01 +0530
Subject: free dictionary english - spanish?
In-Reply-To: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>
References: <9d06558e-dc75-469c-b572-e08095505007@k37g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805160736u670a6a75jc7645f326479d9c5@mail.gmail.com>

if it is complete sentence translation that you intend to do, then there is
a lot more than just word dictionary that you need. you need the grammer
too. hope you have that covered.

On 5/16/08, globalrev <skanemupp at yahoo.se> wrote:
>
> i want to write a translationprogram, i have the  webapp done already.
>
> i need a big free dictionary though. english-spanish/spanish-english
> seems like the best i know some spanish and thats what also is needed
> the most i think together with chinese.
>
> anywhere you can download one? preferrably easy to parse...
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From daveparker at flamingthunder.com  Wed May 21 18:28:18 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 15:28:18 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
Message-ID: <d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>

On May 21, 4:21?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Which is exactly what the python decimal module does.

Thank you (and Jerry Hill) for pointing that out.  If I want to check
Flaming Thunder's results against an independent program, I'll know to
use Python with the decimal module.


From BrianVanderburg2 at aim.com  Thu May  8 08:55:54 2008
From: BrianVanderburg2 at aim.com (Brian Vanderburg II)
Date: Thu, 08 May 2008 08:55:54 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <20080508083323.06a74930.darcy@druid.net>
References: <CeuSj.107251$rd2.30692@pd7urf3no>	<87bq3ozs09.fsf@benfinney.id.au>	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>	<4822E485.4040107@aim.com>
	<20080508083323.06a74930.darcy@druid.net>
Message-ID: <4822F85A.8030901@aim.com>

D'Arcy J.M. Cain wrote:
> On Thu, 08 May 2008 07:31:17 -0400
> Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>   
>> This is sort of related, but I'm wondering what is different between 
>> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
>> thing, since an absolute path is not specified, find 'python' from the 
>> PATH environment,  I don't really know.
>>     
>
> Well, I know what happened when I tried it.  What happened when you
> tried it?
>
>   
I haven't tried it but I've seen some files like written that in the 
past with just a name and no path for some other interpreter (perl or sh 
probably) and didn't know what the different was or if it was even 
valid.  I at a windows system now so I can't try it yet.

Brian Vanderburg II


From usenet at solar-empire.de  Mon May  5 08:28:27 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Mon, 5 May 2008 14:28:27 +0200
Subject: confused about self, why not a reserved word?
References: <972f7226-baef-4f94-a8ea-5bec99213540@34g2000hsf.googlegroups.com>
Message-ID: <b4b3f5-0ng.ln1@pluto.solar-empire.de>

globalrev <skanemupp at yahoo.se> wrote:
> class Foo(object):
>        def Hello(self):
>                print "hi"
> 
> object is purple, ie some sort of reserved word.
> 
> why is self in black(ie a normal word) when it has special powers.

Because `self` is just a name. Using `self` is a convention, but one can
use any name which is not reserved.

> replacing it with sel for example will cause an error when calling
> Hello.

Which error? I don't get one.

0:tolot:/tmp> python f.py
hi
0:tolot:/tmp> cat f.py
class Foo(object):
        def Hello(sel):
                print "hi"

Foo().Hello()
0:tolot:/tmp> 

Marc


From stef.mientki at gmail.com  Wed May 14 13:43:13 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Wed, 14 May 2008 19:43:13 +0200
Subject: [ANN]  PPyGui emulator
In-Reply-To: <482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
References: <mailman.1087.1210718589.12834.python-list@python.org>
	<482aa2f2$0$22076$6e1ede2f@read.cnntp.org>
Message-ID: <482B24B1.6080400@gmail.com>

clabepa wrote:
> Stef Mientki wrote:
>
>> I've ran the first real world application through PPyGui-emulator,
>> so I think it's time to release the first version.
>> There's lot of room for improvements and a more beautiful layout.
>>
>> PPyGui-emulator is build upon wxPython and released under BSD license.
>>
>> For remarks, screen shots and downloads, see
>> http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pp_intro.html
>
> Wow! wonderful.
> I was searching for it for debugging and easy development purposes,
> screenshots sounds promising.
>
> but the api.py link is broken.
Well the file is correctly at the server,
and indeed it downloads as nonsense ???
Is it not possible to just put a py-file on the server ??

Anyway, I've changed it into a zip file, and now everything works (at 
least at my place)


cheers,
Stef


From castironpi at gmail.com  Thu May 15 10:01:30 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:01:30 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <e51f72f7-2cc2-4496-b6fd-488c9308c41d@w7g2000hsa.googlegroups.com>

On May 15, 8:32?am, castironpi <castiro... at gmail.com> wrote:
> Why can't I write this?

It is twice one.  Now: Where's My Volume?


From gherron at islandtraining.com  Sat May 10 11:32:47 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sat, 10 May 2008 08:32:47 -0700
Subject: How to call a file
In-Reply-To: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
References: <a5bfba430805092213r3d5258b7l732d6741269adf2c@mail.gmail.com>
Message-ID: <4825C01F.1070409@islandtraining.com>

Chris Sprinkles wrote:
> I'm still having trouble with calling a text file and I know its so 
> simple here is the code
> ----------------------------------------------------
> work = open('C:\Documents and Settings\Administrator\My 
> Documents\Chris\Python\Python\work.txt', 'r')
> for line in work.txt:
>     print line
> -----------------------------------------------------
> Ok so I know that the directory is right cause I'm not a complete 
> idiot but I keep getting an error? What am I missing here?
> -Chris-
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
First of all, some terminology: You are not *calling* a file, you are 
*opening* it or reading.

Once you *open* the file, you store the resulting file object in a 
variable named "work", then to use that object to request a line, thus:

for line in work:
  print line


Hint: When you say "I keep getting an error",  you really have not 
provided mush useful information.   In the future, when you get an 
error, and you want help, spend the time to post the error message and 
traceback along with your question.   In this case, the problem was 
trivially easy to spot, but you'll get past these trivial problems 
soon.  Then you'll be more likely to find volunteers who will spend time 
to help *if* you spend the time to provide useful information.

Gary Herron



From Lie.1296 at gmail.com  Sun May 18 09:10:24 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 06:10:24 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <cc163397-fe6a-4d9f-b5b2-94d4cc4772ad@w8g2000prd.googlegroups.com>

On May 9, 8:41?pm, grbgooglefan <ganeshbo... at gmail.com> wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
>
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
> ? ? ?return 1
>
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
>
> How can I make "not" as "!"?

Are you trying to make Python a C? Realize that when you work with a
language, you play by that language's rule, not by your rule. This
seems like a troll or something.


From deets at nospam.web.de  Tue May 13 17:44:35 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 23:44:35 +0200
Subject: Why can't I import this?
In-Reply-To: <e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
References: <dc509787-d81a-4719-a131-420f7ba219dd@k10g2000prm.googlegroups.com>
	<68ubcuF2ur7lkU2@mid.uni-berlin.de>
	<e7be105a-4264-45ee-9400-b9545ad01e3c@z16g2000prn.googlegroups.com>
Message-ID: <68ugegF2ucssjU1@mid.uni-berlin.de>

> Thumper's dad always told him:  If you don't have anything nice/useful/
> garbage to say, then don't say noth'ng at all.

You mean it's not useful to tell you


  - to give more information on *what* acutally goes wrong?

  - in the meantime, to look harder for your mistake, because it's 
unlikely to be python's failure?


Can't help you then. Won't happen again.

Diez


From efurman at admailinc.com  Tue May 20 18:36:25 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 20 May 2008 14:36:25 -0800
Subject: Struct usage and varying sizes of h, l, etc
Message-ID: <48335269.2000809@admailinc.com>

Greetings,

I'm looking at the struct module for binary packing of ints and floats.  
The documentation refers to C datatypes.  It's been many years since I 
looked at C, but I seem to remember that the data type sizes were not 
fixed -- for example, an int might be two byes on one machine, and four 
bytes on the next.  Can any C programmers verify this?  If it is true, 
does that mean that struct.pack('h', 8001) might give me different 
results depending on the machine it's running on?

Thanks for any help!
--
Ethan
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From basti.wiesner at gmx.net  Mon May 26 11:36:39 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Mon, 26 May 2008 17:36:39 +0200
Subject: Python web development that resembles PHP or classic ASP
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<mailman.1599.1211790412.12834.python-list@python.org>
Message-ID: <g1elf9$a0s$01$1@news.t-online.com>

[ Max M <maxm at mxm.dk> ]

> erik.oosterwaal at gmail.com skrev:
>> Hi All,
> 
>> So that's when I started looking at other dynamic languages for
>> webdevelopment. I looked at Ruby on Rails and at the different web-
>> frameworks that are available for Python. The biggest problem there
>> for me is that the MVC type frameworks that are currently very popular
>> are also not what I'm looking for.
> 
> Hi Erik,
> 
> I am an experienced Python developer working mostly in Plone. Before
> that I came from asp like you.
> 
> 
> If you want something that is most like what you are used to, you should
> check out Django. I have not worked in it, but it get high praises from
> developers I trust.
> 
> http://www.djangoproject.com/

Django is one of these "MFC type frameworks" the OP was excatly _not_
looking for ;)
 
> If you want a more "modern" approach you should check out Grok. It has
> been built on all the experiences made with Zope 2, CMF and Plone. It is
> based on Zope 3.
> 
> http://grok.zope.org/
> 
> It is the one I would choose if starting from fresh today.

Grok too is very different from classic asp programming, it even abstracts
much more from HTTP than Django does.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From zer0dyer at verizon.net  Mon May 26 20:49:45 2008
From: zer0dyer at verizon.net (Curtis)
Date: Tue, 27 May 2008 00:49:45 GMT
Subject: php vs python
In-Reply-To: <k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<7xwslnwa3s.fsf@ruckus.brouhaha.com> <5IH_j.3432$tF1.2671@trnddc01>
	<k-WdnZj8_f5216bVnZ2dnUVZ_oKdnZ2d@comcast.com>
Message-ID: <JUI_j.1252$nx6.964@trnddc03>

Jerry Stuckle wrote:
> Curtis wrote:
>> Paul Rubin wrote:
>>> notbob <notbob at nothome.com> writes:
>>>> Well, that's my actual question, then.  Is php really so bad I'm just
>>>> wasting my time?  Or is it really the quickest way to blog 
>>>> functionality?
>>>
>>> php is very easy to get started with and some big sites have been
>>> written in it.  There is lots of low cost php hosting available.  It
>>> is not as good a language as Python.  However, Python's advantages are
>>> strongest in more complex projects.  For simple stuff, php is frankly
>>> less hassle just because of its wide deployment and that extensive
>>> function library that the blog post your quoted described as a bad
>>> thing.  Python's libraries are not bad, but php's are more intensely
>>> focused on web apps and includes what you need as part of the standard
>>> build.  With Python, if you want a database adapter or web template
>>> framework, you have to choose between a bunch of different ones and
>>> download and configure it which often involves head scratching when
>>> the auto-install stuff hits some quirk of your system.  With php, it's
>>> all right there when you flip the switch.
>>>
>>> Knowing lots of languages is good for you.  php is probably your
>>> quickest route to getting a rudimentary web app running.  Python
>>> is a longer term project.  Do both.
>>
>> PHP is more than capable for handling large projects, not just small 
>> scripting jobs. However, Paul's right about PHP being more driven 
>> toward web development, where as Python may be better for different 
>> types of apps.
>>
>> Even then, I think your first reply was best, it just comes down to 
>> what you have more fun writing. Both languages are equally capable of 
>> getting the job done.
>>
>> -- 
>> Curtis
> 
> Not true.  PHP is quite capable of writing large, non-web based 
> projects.  While it's non-browser based display capabilities are 
> somewhat lacking (although there are third party libraries which help a 
> lot), I've written some pretty complicated batch scripts in the past.
> 

Yeah, I see I may have spoken too soon. When I think about it, the PHP 
extensions available do cover a lot of ground. I've played around with 
php-gtk in the past, but nothing major.

To clarify: what I meant to say is that php is especially well suited 
for web development, I didn't mean that it wasn't capable of doing 
non-web based development.

--
Curtis


From mal at egenix.com  Thu May  1 08:10:39 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 01 May 2008 14:10:39 +0200
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <4819B33F.708@egenix.com>

On 2008-05-01 13:37, Lance Gamet wrote:
> Hi, python beginner starting a new project here.
> 
> This project will store most of its actual data in a shared-database, but 
> I have a small amount of user specific data that I need to be stored like 
> configuration or preferences for example, the list of databases that the 
> program should connect to.
> 
> On Unix this might be a .file, on windows this could be in the registry, 
> or an ini file or an xml file in ProgramData or AppData or something.
> 
> Is there a pythony way to store such config data, perhaps there is 
> already a standard python package for such a purpose?

I don't think this is a Python question, but more a platform
question. Users on different platforms will expect configuration
data in different places. It's usually best to stick to the platform
conventions.

Python has modules available for accessing INI-files, XML-files
and also for the Windows registry, so that part is easy.

> My app uses Qt, and Qt has its method of doing it (QSettings), but for 
> architectural reasons I don't want to use it.
> 
> Could sqlite be an option perhaps? I am still undecided if the ability 
> for the user to edit the file independently of the program is a good or 
> bad thing.

If the user is meant to change the data, then you should make this
easy for the user. Putting such data into SQLite will not satisfy that
requirement :-)

If you don't have a GUI tool for the user to change config settings,
then it's probably best to put the configuration into a file that's
easy to edit, e.g. an INI file.

Here's a nice module that supports both reading and writing
INI files:

http://www.voidspace.org.uk/python/configobj.html

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 01 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From fuzzyman at gmail.com  Sat May 24 13:22:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:22:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
	<06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>
Message-ID: <93af845b-fc1a-4e7a-991b-ffa43beef470@8g2000hse.googlegroups.com>

On May 24, 6:18?pm, bearophileH... at lycos.com wrote:
> Ben Finney:
>
> >In Python, the philosophy "we're all consenting adults here" applies.<
>
> Michael Foord:
>
> > They will use whatever they find, whether it is the best way to
> > achieve a goal or not. Once they start using it they will expect us to
> > maintain it - and us telling them it wasn't intended to be used by
> > them in the first place won't cut it.
>
> So they will use the methods with one or two underscores too. And
> imply that you want to document them too.
> They don't seem adult enough, then ;-)


Great! We'll just tell them that...

Michael

> Internal API hiding seems quite less useful if you don't need to let
> customers manage your code.
>
> Bye,
> bearophile



From arnodel at googlemail.com  Sat May 31 08:01:51 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 31 May 2008 13:01:51 +0100
Subject: ValueError: unknown locale: UTF-8
References: <mailman.1790.1212231888.12834.python-list@python.org>
Message-ID: <m2bq2mbs28.fsf@googlemail.com>

Mario Ruggier <mario at ruggier.org> writes:

> On OS X 10.5.2 :
>
> $ python
> Python 2.5.1 (r251:54863, Feb  4 2008, 21:48:13)
> [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import locale
>>>> locale.getdefaultlocale()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/locale.py", line 441, in getdefaultlocale
>     return _parse_localename(localename)
>   File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/
> python2.5/locale.py", line 373, in _parse_localename
>     raise ValueError, 'unknown locale: %s' % localename
> ValueError: unknown locale: UTF-8
>>>>
>
> This is on open bug or is there more to it?
>
> Regards, mario

Works for me (10.5.3):

marigold:~ arno$ uname -srv
Darwin 9.3.0 Darwin Kernel Version 9.3.0: Fri May 23 00:49:16 PDT 2008; root:xnu-1228.5.18~1/RELEASE_I386
marigold:~ arno$ python -c "import locale; print locale.getdefaultlocale()"
('en_GB', 'UTF8')

-- 
Arnaud


From arnlen at mac.com  Thu May  1 12:54:50 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 18:54:50 +0200
Subject: Photo gallery software
References: <mailman.414.1209654409.12834.python-list@python.org>
Message-ID: <0001HW.C43FC27A00A3F774B01AD9AF@news.individual.de>

On Thu, 1 May 2008 16:59:33 +0200, Scott Sandeman-Allen wrote
(in article <mailman.414.1209654409.12834.python-list at python.org>):

> I've been working with Photologue for a while with some nice results.
>     <http://code.google.com/p/django-photologue/>

Looks like it's time to start reading that Django book.

	Thanks, JA



From __peter__ at web.de  Fri May 16 04:27:17 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 10:27:17 +0200
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
Message-ID: <g0jgh4$r7e$00$1@news.t-online.com>

A.T.Hofkamp wrote:

> Yesterday we found the cause of a bug that has caused problems for a long
> time. It appeared to be the following:
> 
> class A(object):
>     pass
> 
> print min(1.0, A())
> 
> which is accepted by Python even though the A() object is not numerical in
> nature.
> 
> The cause of this behavior seems to be the compare operation of the object
> class.
> 
> 
> Is there a way to disable this behavior in Python (other than deriving a
> new 'object-like' class that doesn't do comparisons?)

As Bruno says, this will change in 3.0:

# 3.0
>>> class A: pass
...
>>> min(1.0, A())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    TypeError: unorderable types: A() < float()

For 2.5 and above you can provide a key function as a workaround:

# 2.5
>>> class A(object): pass
...
>>> min(1, A(), key=float)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: float() argument must be a string or a number

Peter


From nospam at nospam.com  Thu May 15 00:38:05 2008
From: nospam at nospam.com (Gilles Ganault)
Date: Thu, 15 May 2008 06:38:05 +0200
Subject: Recommended way to POST with cookies?
Message-ID: <bafn249hgco42to3ipdu2812iuhqnf574a@4ax.com>

Hello

	According to Google, there seems to be several tools available,
possibly deprecated, to download data from web pages by POSTing forms
and save cookies to maintain state.

I need to write a script under Windows with ActivePython 2.5.1.1  that
would do this:
1. Connect through a local proxy, so I can see the whole dialog
between the Python script and the web server
2. POST form variables
3. Save cookies sent by the server (session cookie to keep state)
4. Save received data into an SQLite file

Which tools would you recommend for this type of script?

Thank you.


From lists at cheimes.de  Thu May  1 17:45:01 2008
From: lists at cheimes.de (Christian Heimes)
Date: Thu, 01 May 2008 23:45:01 +0200
Subject: where do I begin with web programming in python?
In-Reply-To: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <481A39DD.2020503@cheimes.de>

jmDesktop schrieb:
> I have been to the main python site, but am still confused.  I have
> been using .net, so it may be obvious how to do this to everyone
> else.  I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these.  If I
> have mod_python or fastcgi on apache, where do I start?  I don't have
> clue where to begin to create a web page from scratch in python.  I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.

I highly recommend WSGI instead of mod_python or (fast)cgi. I've heard
only bad things about mod_python over the past years and CGI is totally
old school.

Check out Python Paste, CherryPy and Django. You can also try the Zope,
Zope3 and Plone world but Zope is usually for larger and complex
applications.

Most frameworks come with their own little web server for development, too.

Christian


From Pidgeot18 at verizon.invalid  Sun May 25 23:12:54 2008
From: Pidgeot18 at verizon.invalid (Joshua Cranmer)
Date: Mon, 26 May 2008 03:12:54 GMT
Subject: blogs, longbets.org, and education of sociology
In-Reply-To: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <WUp_j.5882$ED6.2250@trnddc02>

xahlee at gmail.com wrote:
> For about the past 10 years, i have been concerned in the programing
> community's level of education in social issues.

[ Adjusts killfile as necessary. ]

> I have found that recently, a news that would be of interest to
> programers.
> 
> There was a bet at longbets.org (run by Long Now Foundation) regarding
> the importance of blogs. The bet was made in 2002. The prediction has
> a resolution date in 2007.
> 
> In 2008, the bet is resolved. See
> 
> ?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
>  http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/
                            ^^^^^^^^^^

Recently? Also, work on that spelling of yours.

> I'd like encourage, for many of you, who have lots of opinions on
> technical issues or social issues surrounding software, to make use of
> longbets.org. It can help shape your thoughts from blog fart to
> something more refined. In any case, your money will benefit society.

I am getting this sense that you have some sort of monetary connection 
to said site.

> ? I bet that Java will be out of the top 10 programing languages by
> 2020.

FORTRAN was first used in the 1950s. IIRC, it's still in the top 10. 
Languages die hard.

> ? I bet that the top 10 programing languages in 2015 (as determined by
> requirement from job search engine), the majority will be those
> characterized as dynamic languages (e.g. php, perl, python,
> javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
> Haskell)).

Right, once again Java-bashing in a Java forum. There's one (actually 
two, but that's a different story) too many trolls in here!

I'd also like to point out that determining language use by "job search 
engine" requirements is setting one up to certain biases and is not 
sufficiently representative of the true patterns.

> Note, in almost all online forums where tech geekers gather (e.g.
> newsgroups, slashdot, irc, etc), often they are anonymous, each fart
> ignorant cries and gripes and heated arguments, often in a
> irresponsible and carefree way.

Okay, we already know that most /. users tend to act immature, but that 
can hardly be said about newsgroups or IRC. Just read c.l.j.p's postings 
for the last month to disprove your proposition.

> One of the longbets.org's goal is to foster RESPONSIBILITY.

How does making a bet make one responsible?

> In recent years, i have often made claims that the Python's
> documentation, it's writing quality and its documentation quality in
> whole, is one of the worst.

... Are you trying to be ironic on purpose?

> Among all the wild claims in our modern world, from the sciences to
> social or political issues, my claim about Python's technical writing
> quality or its whole quality as a technical documentation, is actualy
> trivial to verify by any standards.

Quality is subjective, so it's not trivial to verify.

> Some of these beer drinking fuckheads are simply being a asshole,
> which are expected by the nature of online tech geeking communities (a
> significance percentage are bored young males). However, many others,
> many with many years of programing experience as a professional,
> sincerely tried to say something to the effect of ?in my opinion it's
> good?, or voice other stupid remarks to the effect of ?why don't you
> fix it?, and in fact find my claim, and its tone too fantastical, to
> the point thinking i'm a youngling who are bent on to do nothing but
> vandalism. (the tech geekers use in-group slang for this: ?troll?.)

Right, so in response to your complaints that something is poor, people 
who try to (IMHO validly so) claim otherwise, or suggest that you take 
the initiative to change the status quo makes them blithering idiots. 
Although I'm sure that I have already lost all credibility with you, I 
would like to point out one of the defining features of open source: if 
you don't like it, you can change it. No one is pointing a gun at your 
head and forcing you to use python's documentation.

Besides, you claim that longbets.org is fostering "responsibility." If 
you want to change the world, take some responsibility and do it yourself.

> By that i mean that there is no
> consensus on the subject among its experts, and the issue is complex,
> and has political implications.

I think all concerned would agree that crossposting a message to several 
groups (one of your examples) with the intent of criticizing those in 
one group and providing information at best tangential to the charters 
of other groups is of no merit, and is bad form.

> I think, the founding of Long Now Foundation with its longbets.org,
> shares a concern i have on the tech geeking communities. In
> particular, tech geekers need to have a broader education on social
> sciences, needs to think in long term, and needs to foster personal

Lesson 1: in public fora, screaming and using the most vulgar language 
at someone is poor social form. In olden times, such language as you 
have presented here might merit punishments like lashings, but in our 
more modern egalitarian society, the worst punishment you will receive 
is a stern glare.

Besides, I think in the long term. I'm already sorting out my retirement 
funds and I've not received a college diploma yet.

 > (note: not reading more motherfucking slashdot or
> motherfucking groklaw or more great podcasts on your beatific language
> or your postmodernistic fuckhead idols)

I read /. more to amuse myself on the idiots there, I don't read 
groklaw, and I don't listen to podcasts. What I do do is program, read, 
espouse my opinions on the current economic and political conditions, 
read, check my email, read, read the newspaper, read, and pick up 
another of McCullough's wonderful books and read some more.

> (One thing you can do, is actually take a course on philosophy,
> history, law, economics, in your local community college.)

And you should also take a course on Manners 101 at your local community 
college.

I would finally like to add that you seem to put yourself on the 
pedestal of being the sole person who is righteous in a quagmire of a 
world, while the truth could not be further. Anyone who must resort to 
base name-calling and mere obscenities when criticizing others has 
problems of their own. (In my defense, I do not place myself on such a 
pedestal: I respect the opinions of others in this newsgroup far above 
myself and would also like to add that they are capable of restraining 
themselves when reading provocative banter while I am not).

-- 
Beware of bugs in the above code; I have only proved it correct, not 
tried it. -- Donald E. Knuth


From python at rcn.com  Mon May  5 04:08:15 2008
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 5 May 2008 01:08:15 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <96087833-b427-4615-9188-c756394af15c@f24g2000prh.googlegroups.com>

On May 3, 9:50?am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> I did the following calculation: ?Generated a list of a million random
> numbers between 0 and 1, constructed a new list by subtracting the mean
> value from each number, and then calculated the mean again.
>
> The result should be 0, but of course it will differ from 0 slightly
> because of rounding errors.

See:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/393090



> Here's the program (pardon my style, I'm a newbie/occasional user):
 . . .
> mean = sum(data)/len(data)
> print sum(x - mean for x in data)/len(data)

See:
http://svn.python.org/view/sandbox/trunk/statistics/statistics.py?rev=40981&view=markup


Raymond



From rewonka at gmail.com  Thu May 29 10:42:07 2008
From: rewonka at gmail.com (rewonka at gmail.com)
Date: Thu, 29 May 2008 07:42:07 -0700 (PDT)
Subject: bit parsing from file
Message-ID: <4402d8fc-d1d4-4c6e-b3e3-0d425e88bf1a@59g2000hsb.googlegroups.com>

Hello,

I'm tring to make a cutting script.
The problem is the following, i have a sample pattern, for
example :'11101110' (0xEE)
That is the sign of the data begining.
How can i cut a file if the byte stepping is not the same, for
example:

file=open('test.bin','rb')
data=file.read()
print binascii.hexlify(data)            # BB9A (1011101110011010)
file.close()

so i need to cut the first two bit and start to writeout the bit
stream to another file
If somebody have an idea to do this, please share with me.
Thanx

Rew


From inhahe at gmail.com  Sun May 18 00:21:46 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 00:21:46 -0400
Subject: help compiling Python on vs 2008!
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net><e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<mailman.1287.1211058342.12834.python-list@python.org>
Message-ID: <U8OXj.6920$255.269@bignews8.bellsouth.net>

VS2005 seems to be officially supported.  Here's part of the readme file in 
the PCBuild8 directory in the Python 2.5 source.

"
 Building Python using VC++ 8.0
-------------------------------------
This directory is used to build Python for Win32 platforms, e.g. Windows
95, 98 and NT.  It requires Microsoft Visual C++ 8.0
(a.k.a. Visual Studio 2005).  There are two Platforms defined, Win32
and x64.
(For other Windows platforms and compilers, see ../PC/readme.txt.)
"

Although I take your point about sharing resources.  I'm not sure I should 
bother compiling 2.6, since I'll probably come across/already use modules 
that I need that don't support 2.6 since it's so new.  So it would be nice 
to know why following the instructions doesn't work.  Compilers never work 
for me, though.. even when I follow instructions and they work for everybody 
else.  It's like a schroedinbug - I just don't expect them to work.  As a 
matter of principle, though, it /should/ work.. so it's gotta be 
*somebody's* job to debug this! :P

"Christian Heimes" <lists at cheimes.de> wrote in message 
news:mailman.1287.1211058342.12834.python-list at python.org...
> Matthieu Brucher schrieb:
>> Hi,
>>
>> I did not manage to build extension with distutils with Python compiled 
>> with
>> VS different than 2003. The need for 2003 was hard-coded in distutils.
>> You can try building extensions with VS2008 with Scons. This is what I do 
>> a
>> lot, and everything works fine as long as the interface does not use
>> standard structures (like FILE, custom structures are fine) or objects
>> allocated in the extension is freed in the extension.
>
> Python 2.5 is compiled with VS 2003. Neither VS 2005 nor 2008 are
> officially supported.
>
> You can compile extensions with a different version of MS VC but it can
> get you in a lot of trouble. Every version of the VS Compiler uses its
> own C Runtime Library (MSVCRT). You can't share some resources like
> allocated memory and FILE* objects between MSVCRTs.
>
> Christian
> 




From jcd at sdf.lonestar.org  Fri May 16 09:41:06 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 16 May 2008 09:41:06 -0400
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<4ee9d5fa-5012-40a5-8bf6-c2624781d855@k37g2000hsf.googlegroups.com>
Message-ID: <1210945266.3364.8.camel@aalcdl07.lib.unc.edu>

On Fri, 2008-05-16 at 06:07 -0700, globalrev wrote:
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
> > globalrev a ?crit :
> >
> > > wassup here?
> >
> > > 7
> >
> > > Traceback (most recent call last):
> > >   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
> > > <module>
> > >     print cust1.getID()
> > > AttributeError: 'NoneType' object has no attribute 'getID'
> >
> > > class customer:
> >
> > 1/ naming convention : class names should be CamelCased
> > 2/ unless you need compatibility with years old Python versions, use
> > newstyle classes
> >
> > class Customer(object):
> >
> > >     def __init__(self, ID, movies):
> > >         self.ID = ID
> > >         self.movies = movies
> >
> > 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
> >
> >      def __init__(self, id, movies):
> >          self.id = id
> >          self.movies = movies
> >
> > >     def getID():
> > >         return self.ID
> >
> > >     def getMovies():
> > >         return self.movies
> >
> > 4/ Python has support for computed attributes, so you just don't need
> > these getters.
> >
> >
> >
> > > import os
> > > import customer
> > > import movie
> >
> > > mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
> > > mv1str = mv1.read()
> >
> > > print mv1str.count(',5,')
> >
> > > cust1 = customer.__init__('12',['1','435','2332'])
> >
> > __init__ is automagically called on instanciation, so you don't have to
> > call it yourself. And FWIW, your __init__ returns None.
> >
> > cust1 = Customer('12', ['1', '435', '2332'])
> >
> > > print cust1.getID()
> >
> > print cust1.id
> 
> 
> what should init return normally? a customer-object?
> 
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
>         return self
> 
> 
> ?

No.  __init__ should not return anything (rather, it should return None,
but it'll do that on its own without you telling it to return anything).
The problem is that you are trying to create an object with __init__,
but that is not what it does.  It *initializes* objects that already
exist.  when you call a class, it creates a new instance using
__new__(), and then initializes it using __init__().  So if you were
really inclined to muck around.  You could do something like

cust1 = Customer.__new__(Customer)
cust1.__init__('12', ['1','435', '2332'])

But that would just be silly.  What you really want is this:

cust1 = Customer('12', ['1','435', '2332'])

which does the same thing.  Don't explicitly call under-under variables
unless you really have to.

Cheers,
Cliff





From kib2 at free.fr  Tue May 20 18:38:29 2008
From: kib2 at free.fr (kib)
Date: Wed, 21 May 2008 00:38:29 +0200
Subject: Processing in Python
In-Reply-To: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
	<d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>
Message-ID: <483352e5$0$3438$426a34cc@news.free.fr>

A PyQt4 version here : http://dev.nodebox.net/wiki/Qt , but it's really 
buggy (no one seems to have fixed it till 5 months).

There's even a PyGtk clone of NodeBox here : http://shoebox.sollec.org/

I'll be happy to work on one of these projects, see you :

Kib.



From collinyeung at shaw.ca  Wed May 14 22:36:29 2008
From: collinyeung at shaw.ca (Collin)
Date: Thu, 15 May 2008 02:36:29 GMT
Subject: Accepting text input
In-Reply-To: <mailman.1096.1210734320.12834.python-list@python.org>
References: <72QVj.262833$pM4.115744@pd7urf1no>	<84QVj.133083$rd2.94188@pd7urf3no>	<mailman.960.1210570776.12834.python-list@python.org>	<MSqWj.266252$pM4.8985@pd7urf1no>
	<mailman.1096.1210734320.12834.python-list@python.org>
Message-ID: <NkNWj.138991$Cj7.33283@pd7urf2no>

Kam-Hung Soh wrote:
> On Wed, 14 May 2008 11:02:36 +1000, Collin <collinyeung at shaw.ca> wrote:
> 
>> Gabriel Genellina wrote:
>>> En Mon, 12 May 2008 01:54:28 -0300, Collin <collinyeung at shaw.ca> 
>>> escribi?:
>>>
>>>> Collin wrote:
>>>>> I'm pretty new to Python, but this has really bugged me. I can't 
>>>>> find a
>>>>> way around it.
>>>>>
>>>>>
>>>>> The problem is that, when I use raw_input("sajfasjdf") whatever, or
>>>>> input("dsjfadsjfa"), you can only have numerical values as answers.
>>>>>
>>>>> Any help would be appreciated. Thanks.
>>>>
>>>> Oh, wow. I feel so stupid. Please disregard this message. <_<
>>>  No need to apologize...
>>>
>>>> I read the error message just now a bit more carefully, and I tried
>>>> something. I tried defining "yes" as some random numerical value. Then
>>>> when I did:
>>>> (example code)
>>>>
>>>> yes = 123123983 #some number
>>>> test = input("Test test test ")
>>>> if test == yes:
>>>>     print "It worked."
>>>> else:
>>>>     print "failed"
>>>>
>>>> (example code off)
>>>  The usual way for Python<3.0 is:
>>>  answer = raw_input("Test test test ").lower()
>>> if answer == "yes":
>>>      ...
>>>  The input() function evaluates user input as an expression: if he 
>>> types 2+5 the input() function returns the integer 7. I would never 
>>> use input() in a program - it's way too unsafe; use always raw_input 
>>> instead.
>>>
>>
>> If I use it like that, do I have to import anything to have the 
>> .lower() work? And if I do, what does the .lower() signify?
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
> 
> You don't need to import any module to use ".lower()"; it is a method of 
> a string.  raw_input() returns a string, so you can use methods of a 
> string.
> 
> Try the following statement to see what happens:
> "ABCDE".lower()
> 

So the .lower() string method is just to convert the string to lowercase 
letters so that you don't have to type a bunch of if - then statements 
in both cases, I'm assuming?


From gagsl-py2 at yahoo.com.ar  Mon May  5 00:11:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 01:11:02 -0300
Subject: multirhreading&boost.python
References: <1209912974.11364.10.camel@van-dattum>
Message-ID: <op.uanxwo0kx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 11:56:14 -0300, joop renes <jj.renes at hccnet.nl> escribi?:

> i hope this is the right list for the following question of a c++
> hacker,python newbie. i have a library in c++ to which i want to add a
> python GUI and other python stuff.The library has multithreading
> components, while python uses a reference counted memory model. Usually
> mixing reference counting with multithreading is frowned upon, at least
> in the c++ world. what am i to expect in the python world, if i bring
> multithreading c++ into it? just performance penalty or total disaster?
> best regards

Python objects are reference counted, *and* you can have many threads running. This is not a problem in itself; Python has a Global Interpreter Lock (GIL) that ensures that addref/releases are properly handled. Only one thread at a time can execute Python code; but your C++ library can use as many threads as you want - as long as they don't call Python code again without reacquiring the GIL.

-- 
Gabriel Genellina



From bruno.desthuilliers at gmail.com  Wed May  7 17:03:37 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 14:03:37 -0700 (PDT)
Subject: Idea for P3K
References: <4821d418$0$932$ba4acef3@news.orange.fr>
	<m2k5i6561z.fsf@googlemail.com> 
	<4821fea4$0$880$ba4acef3@news.orange.fr>
	<mailman.717.1210189220.12834.python-list@python.org>
Message-ID: <b8d4f972-a7c2-464c-805e-b10870371c63@24g2000hsh.googlegroups.com>

On 7 mai, 21:41, Gary Herron <gher... at islandtraining.com> wrote:
> M?ta-MCI (MVP) wrote:
> > Hi!
>
> >> I don't often feel like using this word
>
> > Look at languages like OCAML or F #
>
> > @-salutations
>
> Well of course, we're all well aware of other languages that allow
> variables to be bound in the middle of an expression.  It's just that
> Python was purposely created without that (mis)feature because it's so
> unclear, and easy to abuse.

This is the same argument that has been used to justify the lack of MI
and operator overloading in Java.

Not that I would support having assignment as expressions in Python
(wouldn't fit the whole design IMHO), but this is still a somewhat
arbitrary design choice, not necessarily a GoodThing(tm) by itself -
well designed expression-based languages have their strength too.


From martin at v.loewis.de  Sat May 10 12:27:45 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sat, 10 May 2008 18:27:45 +0200
Subject: People still using Tkinter?
In-Reply-To: <mailman.906.1210435115.12834.python-list@python.org>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
	<mailman.906.1210435115.12834.python-list@python.org>
Message-ID: <4825cd01$0$14982$9b622d9e@news.freenet.de>

> I am, but "still" isn't the word, I just started.  Good, *complete*
> docs seem to be hard to find, but using a combination of the free
> resources and going back and forth between them seems to work all
> right so far.

IMO, the trick really is to also have a Tk documentation around.
If you need to find out what option is supported by what widget,
there isn't really much point in duplicating that information in
Tkinter, IMO - the Tk documentation has it all.

Regards,
Martin


From alokkat at gmail.com  Wed May 28 20:31:44 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Wed, 28 May 2008 20:31:44 -0400
Subject: multi dimensional dictionary
In-Reply-To: <g1j436$6i8$02$1@news.t-online.com>
References: <e3a81e680805272122h695c3c4bh1199011a750c38d0@mail.gmail.com>
	<mailman.1675.1211954129.12834.python-list@python.org>
	<g1j436$6i8$02$1@news.t-online.com>
Message-ID: <e3a81e680805281731i42f07aalcb806a24eb58df60@mail.gmail.com>

Thanks to all for their kind help and time.

Alok

On Wed, May 28, 2008 at 4:11 AM, Peter Otten <__peter__ at web.de> wrote:

> Gary Herron wrote:
>
> > Alok Kumar wrote:
> >> Dear All,
> >>
> >> I am using dictionary for filling my xpath parsed data.
> >>
> >> I wanted to use in the following manner.
> >>
> >> mydict[index] ["key1"] ["key2"]    #Can someone help me with right
> >> declaration.
> >>
> >> So that I can fill my XML xpath parsed data
> >>
> >> mydict[0] ["person"] ["setTime"] = "12:09:30"
> >> mydict[0] ["person"] ["clrTime"] = "22:09:30"
>
> [I didn't see the original post]
>
> >>> from collections import defaultdict
> >>> def make_inner():
> ...     return defaultdict(lambda: defaultdict(make_inner))
> ...
> >>> mydict = make_inner()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
> defaultdict(<function <lambda> at 0x2b7afd0025f0>, {0:
> defaultdict(<function
> make_inner at 0x2b7afd002578>, {'person': defaultdict(<function <lambda> at
> 0x2b7afd002668>, {'setTime': '12:09:30', 'shoes': defaultdict(<function
> make_inner at 0x2b7afd002578>, {'color': 'bright yellow'})})})})
>
> If that looks too messy, try a subclass:
>
> >>> class Dict(defaultdict):
> ...     def __init__(self):
> ...             defaultdict.__init__(self, Dict)
> ...     def __repr__(self):
> ...             return dict.__repr__(self)
> ...
> >>> mydict = Dict()
> >>> mydict[0]["person"]["setTime"] = "12:09:30"
> >>> mydict
> {0: {'person': {'setTime': '12:09:30'}}}
> >>> mydict[0]["person"]["shoes"]["color"] = "bright yellow"
> >>> mydict
> {0: {'person': {'setTime': '12:09:30', 'shoes': {'color': 'bright
> yellow'}}}}
>
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards
Alok Kumar
-------------- next part --------------
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From iscaris at hotmail.com  Sun May 18 06:41:19 2008
From: iscaris at hotmail.com (Maese Fernando)
Date: Sun, 18 May 2008 03:41:19 -0700 (PDT)
Subject: Error when calling superclass __init__ method
Message-ID: <a371b239-b22f-4f8c-b34c-b0f6e061add7@24g2000hsh.googlegroups.com>


Hi,

I'm getting an odd error while trying to call the __init__ method of a
super class:

BaseField.__init__(self)
TypeError: unbound method __init__() must be called with BaseField
instance as first argument (got nothing instead)


This is the code:

class BaseField(object):

    def _addFieldsToRec(self, rec, *fields):
        for field in fields:
            self.mfn[field] = rec

    def __init__(self):
        self._addFieldsToRec(1,1)
        self._addFieldsToRec(2, 500,501,502,503,504,505,506,507,508)


class Field(BaseField):
    def __init__(self, value):
        BaseField.__init__(self)      # this seems to be the offending
line.
        self.tag = value


What am I doing wrong?


From castironpi at gmail.com  Wed May 14 19:28:37 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 16:28:37 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<mailman.1130.1210789334.12834.python-list@python.org>
Message-ID: <d609d636-7dd3-43df-810b-7188560842ba@d1g2000hsg.googlegroups.com>

On May 14, 1:22?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Tue, May 13, 2008 at 10:55 PM, alex23 <wuwe... at gmail.com> wrote:
> > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
> >> "George Sakkis" <george.sak... at gmail.com> wrote in message
> >> > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> >> > you can safely ignore its posts.
>
> >> How does it generate text?
>
> > My guess is by inhaling a lot of intoxicants.
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> I assumed his message with the subject "bytes1.shuffle()" from a few
> days ago was a glimpse into his source code. ?Or something like it.

I am trying to select a color.  It's color select.py.  Any thoughts?


From xah at xahlee.org  Tue May 20 18:53:04 2008
From: xah at xahlee.org (Xah Lee)
Date: Tue, 20 May 2008 15:53:04 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
Message-ID: <aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>

I offer the python community complete rewrite of the Python doc. The
resulting doc would be one of the best technical writing among Open
Source community's documentations. (a fair verification can be
obtained by polling professional writers and editor community, e.g.
staff writers of Time Mag or other prestigious journals, or tech
writers at Apple or Microsoft or Google.)

Please contact me if interested.

(Otherwise, perhaps someone at google can alot his extra project to
rewrite the python doc. The complaint about python doc has turned up
now and then in the past few years it seems, but always got put down
by python priests)

  Xah
  xah at xahlee.org
? http://xahlee.org/

?



From maxwell.newlands at gmail.com  Thu May 15 09:08:35 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 06:08:35 -0700 (PDT)
Subject: no inputstream?
Message-ID: <aac688da-e69f-4957-8896-0757b5a4339e@p25g2000hsf.googlegroups.com>

hey folks,

coming from java, new to python.  i'm trying to port a java app to
python that writes an inputstream to a buffer, then parses the buffer
(specifically, i'm getting ID3 tags from mp3s online).  i understand
that this java approach to the task may not apply to python, but i'm
having trouble finding a working approach in python.

i currently have locations of the mp3s in question as strings, which
works for parsing local files, but gives me a "No such file or
directory" error when it tries to process URLs.  it seems terribly
inefficient to download each mp3 just to get at that small tag data,
and i assume there's a way to do this with file() or open() or
something, i just can't get it to work.

anyone know how i can fix this?  thanks in advance for any help!

best,
max





From mwilson at the-wire.com  Tue May  6 11:04:20 2008
From: mwilson at the-wire.com (Mel)
Date: Tue, 06 May 2008 11:04:20 -0400
Subject: sed to python: replace Q
References: <48180348$0$34534$742ec2ed@news.sonic.net>
	<op.uaewypalev04yd@melwxp23> <op.uagoa7vhev04yd@melwxp23>
	<4820714b$0$34544$742ec2ed@news.sonic.net>
Message-ID: <fvps39$oug$1@aioe.org>

Raymond wrote:

> My other gripe is with the kludgy object-oriented regex functions.
> Couldn't these be better implemented in-line?  Why should I, as a coder,
> have to 're.compile()' when all the reference languages do this at compile
> time, from a much more straightforward and easy to read in-line
> function...

Because compile time doesn't do

    pattern = raw_input ("Pattern, please: ")
    saved_pattern = re.compile (pattern)

        Mel.



From http  Fri May 30 14:17:09 2008
From: http (Paul Rubin)
Date: 30 May 2008 11:17:09 -0700
Subject: Help needed in choosing an algorithm for Cryptographic services.
References: <c7c02fff-e965-41d4-9df9-5a7c1c294eb9@d19g2000prm.googlegroups.com>
Message-ID: <7xmym7sllm.fsf@ruckus.brouhaha.com>

abhishek <guptaabhishek1983 at gmail.com> writes:
> Hi group, recently my employer asked me too implement encryption/
> decryption for secure data transfer over internet. Problem is that the
> client application is written using C# and the webserver where i need
> to store the information is developed using python.

Use one of the SSL wrappers.  Note that if you're using a recent
Debian distro, make sure to take the latest OpenSSL update since they
had an unbelievably bad screwup that destroyed their versions of
OpenSSL's security for a while.  That applies to all Debian based
distros including Ubuntu, but not to non-Debian derivatives such as
Fedora.


From gherron at islandtraining.com  Thu May 15 13:09:45 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 10:09:45 -0700
Subject: How do I use the unpack function?
In-Reply-To: <d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com>
Message-ID: <482C6E59.3020503@islandtraining.com>

John Machin wrote:
> On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Marlin Rowley wrote:
>>     
>>> All:
>>>       
>>> I've got a script that runs really slow because I'm reading from a
>>> stream a byte at a time:
>>>       
>>> // TERRIBLE
>>> for y in range( height ):
>>>         for color in range(4):
>>>             for x in range( width ):
>>>                 pixelComponent = fileIO.read(4)
>>>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE
>>>       
>
> [snip]
> Perhaps the OP might be able to use the Python Imaging Library (PIL)
> instead of reinventing an image-file handler.
>   

Indeed.  That's why my original answer included the line:
    There are probably better ways overall, but this directly answers 
your question.

Other possibilities.

I don't recognize the file format being read in here, but if it is a 
standard image format, the PIL suggestion is a good way to go.

Or, if it is an image of not too enormous size, read the *whole* thing 
in at once. 

Or rather than manipulate the array by carving off 4 bytes at a time, 
just index through it in 4 byte chunks:
  for i in range(width):
      buffer = unpack("!f", pixelComponent[4*i:4*i+4])

Or
  for i in range(0,4*width,4):
      buffer = unpack("!f", pixelComponent[i:i+4])

Or
  Use numpy.  Create an array of floats, and initialize it with the byte 
string, making sure to take endianess int account.  (I'm quite sure this 
could be made to work, and then the whole operation is enormously fast 
with only several lines of Python code and *no* Python loops.

Or
  ...?

Gary Herron

> --
> http://mail.python.org/mailman/listinfo/python-list
>   



From bignose+hates-spam at benfinney.id.au  Mon May  5 18:17:22 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 06 May 2008 08:17:22 +1000
Subject: License selection for free software (was: ]ANN[ Vellum 0.16: Lots Of
	Documentation and Watching)
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com>
Message-ID: <87ve1se6q5.fsf_-_@benfinney.id.au>

vivainio at gmail.com (Ville M. Vainio) writes:

> Paul Boddie <paul at boddie.org.uk> writes:
> 
> > Anyway, I'm just confirming that I'm clearly not one of the "many"
> > described above. A lot of my own work is licensed under the GPL or
> 
> I guess it's safe to assume that you are not opposed to using code
> based on more liberal license, right? :-)

I'm less inclined to base work on, or contribute to, a work under a
non-copyleft license, because I have less assurance that the code will
remain free for all recipients.

> My point is: GPL is a reason to reject a tool for some

Yes.

> but MIT/BSD never is.

Not true. I, and many others I know, would and have done so.

There's no single free-software license that won't displease some
segment of the free-software community. I think the Vellum project
shouldn't base the selection of license on "do some people dislike
this license?", because the answer is "yes" for all of them.

-- 
 \        "No matter how cynical you become, it's never enough to keep |
  `\                             up."  -- Jane Wagner, via Lily Tomlin |
_o__)                                                                  |
Ben Finney


From umpsumps at gmail.com  Fri May  9 14:40:59 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Fri, 9 May 2008 11:40:59 -0700 (PDT)
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23> 
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23> 
	<g003ol$fi$1@news.xmission.com> <op.uau6xpl7ev04yd@melwxp23> 
	<m2ve1o3th4.fsf@googlemail.com>
	<0ebda682-6c99-43b2-b88b-80f6c88e1c98@p25g2000hsf.googlegroups.com>
Message-ID: <d229f16d-4cde-4223-b539-83c9f754ec13@u6g2000prc.googlegroups.com>

On May 9, 1:45 am, cokofree... at gmail.com wrote:
> >>> key = ''.join(sorted(word))
>
> I tend to strip and lower the word as well, otherwise "Hello" and
> "hello" do not compare...depends on what you want though!
> Plus you might get a lot of "word\n" as keys...
>
> My technique is the this way
>
> def anagram_finder(words):
>     anagrams = {}
>     for word in words:
>         word = word.strip()
>         key = ''.join(sorted(word.lower()))
>         anagrams.setdefault(key, []).append(word)
>     return anagrams

What would be the best method to print the top results, the one's that
had the highest amount of anagrams??  Create a new histogram dict?


From inhahe at gmail.com  Fri May 23 15:47:32 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 15:47:32 -0400
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>	<6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com><mailman.1484.1211483172.12834.python-list@python.org><483659b1$0$11621$607ed4bc@cv.net>
	<mailman.1501.1211543292.12834.python-list@python.org>
Message-ID: <JaFZj.19195$255.19092@bignews8.bellsouth.net>

"""
"Dutton, Sam" <Sam.Dutton at itn.co.uk> wrote in message 
news:mailman.1501.1211543292.12834.python-list at python.org...
Thanks for all the answers and comments.

>math.pi is exactly equal to 884279719003555/281474976710656, which is the 
>closest C double to the actual value of pi

So much for poor old 22/7...

Sam
"""

The biblically correct version:

import math
math.pi = 3











From castironpi at gmail.com  Tue May 13 09:24:56 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 06:24:56 -0700 (PDT)
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<mailman.1051.1210684676.12834.python-list@python.org>
Message-ID: <60b18173-aad1-4054-b239-74f24166c162@z72g2000hsb.googlegroups.com>

On May 13, 8:17?am, Giuseppe Ottaviano <giu... at gmail.com> wrote:
> On May 13, 2008, at 12:28 PM, dannywebs... at googlemail.com wrote:
>
>
>
>
>
> > Hi - I have a list returned from popen/readlines, and am wondering how
> > to go about iterating over each item which was returned (rather than
> > currently having the whole lot returned).
>
> > so far:
>
> >>>> f=os.open("./get_hostnames").readlines
>
> > returns ['host1 host2 host3 ... hostN\n]'
>
> > i'd like to be in a position to iterate through these, grabbing each
> > host. ?I have played with transmuting to a str, and using split, and
> > this works, but I get the subscript brackets from the list output as
> > expected, as the list output is now a string literal, and this is not
> > what I want - and I think it's a bit long-winded to do a search 'n
> > replace on it - hence why I ask in the subject what's the best way.
>
> >>>> f=str(f)
> >>>> f.split()
> > ["['host1","host2", ... ,"hostN\n']"]
>
> If the file is really big, you may want not to construct an actual ?
> list with all the words, but instead use an iterator. If you define ?
> the function
>
> def ichain(seq):
> ? ? ? ? for s in seq:
> ? ? ? ? ? ? ? ? for x in s: yield x
>
> (which is often useful and I don't think it has been included in ?
> itertools) you can iterate lazily on the file:
>
> hosts = ichain(s.split() for s in f)
> for host in hosts:
> ? ? ? ? # ...
>
> HTH,
> Giuseppe- Hide quoted text -
>
> - Show quoted text -

I am having trouble following, but I am not an always-rightter.  Was
s.split( ) one of the things you wanted to do to a line, and likely a
really common one?  I'm trying to approach problems impractically.

Now of course, if anything else is going on in the program, you will
need separate threads or separate interpreters/processes.  Does Python
meet sufficiencies on threading?  What file do we have to test it on?


From badmuthahubbard at gmail.com  Wed May 21 03:33:34 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Wed, 21 May 2008 10:33:34 +0300
Subject: What is wrong with my Python threading?
In-Reply-To: <37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
Message-ID: <8200bab70805210033s4d27909ar37a18535155429c7@mail.gmail.com>

On Tue, May 20, 2008 at 4:28 PM, castironpi <castironpi at gmail.com> wrote:
> On May 20, 8:19 am, "Chuckk Hubbard" <badmuthahubb... at gmail.com>
> wrote:
>> #!/usr/bin/python
>>
>> #why doesn't this run both threads simultaneously?
>> #Thanks for any help.
>> #Chuckk
>>
>> import threading
>> import time
>>
>> def printesc(thrd):
>>     for i in range(10):
>>         time.sleep(1)
>>         print thrd, i
>>
>> def master():
>>     thd1 = threading.Thread(target=printesc, args=(1,))
>>     thd2 = threading.Thread(target=printesc, args=(2,))
>>     thd1.run()
>>     thd2.run()
>>
>> master()
>
> You meant 'thd1.start( )' and 'thd2.start( )'.

So I did.  I was mixing what I read of thread and threading.  I'll
never wander beyond my Python module reference html folder again.
Thanks for your help.

-Chuckk

-- 
http://www.badmuthahubbard.com


From gagsl-py2 at yahoo.com.ar  Tue May  6 00:29:39 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 May 2008 01:29:39 -0300
Subject: How to generate binary python?
References: <5dc598e30805051543g243ed4daw119c7579f3ae4095@mail.gmail.com>
Message-ID: <op.uaptfpdex6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 May 2008 19:43:24 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> Hi, i'm comingo from Java and I'm wanting to know what in Python is the
> equivalent to the file.class in java, I am producing some apps that ar  
> not
> open source, so I would like to share only the binaries, Both for Windows
> and for Linux, Can you suggest me anything?

.class files map roughly to .pyc files
Note that Python generates and writes .pyc files automatically when you  
import a module, but not for the main script being executed.
The standard way to generate a binary distribution is using distutils, see  
the Python wiki at <http://wiki.python.org/moin/DistributionUtilities>


-- 
Gabriel Genellina



From ryntech at gmail.com  Sun May  4 18:13:24 2008
From: ryntech at gmail.com (rynt)
Date: Sun, 4 May 2008 15:13:24 -0700 (PDT)
Subject: Please help - Tkinter not doing anything
References: <20562a9d-200c-40ae-a850-eb0f9a943d3f@l42g2000hsc.googlegroups.com>
	<237aa3894dff4c8976896df85f4d7d23@localhost>
	<3ab5d06a0805040239m6cf12d39ufcde4fcc585f81e4@mail.gmail.com> 
	<mailman.523.1209895879.12834.python-list@python.org>
	<ad03cc2b-e768-4ddd-888f-2968e29ca4ae@b1g2000hsg.googlegroups.com>
	<e3554a8f-3fc1-4f2d-92cc-d72b3d2b1f29@s50g2000hsb.googlegroups.com> 
	<05343da9-b929-4d86-a2b0-80984af9c25c@l64g2000hse.googlegroups.com>
Message-ID: <134cf259-51e6-40aa-a36d-c12985abc5b6@l28g2000prd.googlegroups.com>

WxWidgets, Tkinter, PyQT are all cross platform.  Also have a look at
http://wiki.python.org/moin/GuiProgramming
for more GUI frameworks.

RCB

>On May 4, 4:59?am, Protected <myshel... at gmail.com> wrote:
> On May 4, 12:18 pm, s0s... at gmail.com wrote:
>
>
>
>
>
> > On May 4, 5:22 am, Protected <myshel... at gmail.com> wrote:
>
> > > I had previously ran the import line. I prepended it to the example
> > > code I'm trying to run every time but it did not help, still nothing
> > > happens. With or without var before 'root'. I'm pasting the code in
> > > IDLE and using Windows XP as written in the first post.
>
> > Tkinter doesn't work if you type the statements in IDLE. I don't
> > remember the specifics of it, but essentially it doesn't work because
> > IDLE is itself a Tkinter app. You have to type it at the Python
> > command line or save it in a file. BTW, if you're on Windows, you
> > should definitely check wxPython. I used to work with Tkinter,
> > struggling with it all the time only to get a lame result most of the
> > time. Then I switched to wxPython, and in the same week I was learning
> > it I did a better GUI than I ever did in Tkinter (with months of
> > work!). I feel it makes it easier to make your program have a better
> > structure and design, and thus lets you focus on the actual task of
> > the program, rather than in the GUI itself. Plus, on Windows, you'll
> > get the widgets to look more natively, like any good quality
> > application there is on Windows.
>
> Ah, but is it cross platform?
>
> (Thanks for letting me know about IDLE.)- Hide quoted text -
>
> - Show quoted text -



From luckyluke56 at gmail.com  Sat May 24 13:51:59 2008
From: luckyluke56 at gmail.com (Sh4wn)
Date: Sat, 24 May 2008 10:51:59 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <9c41796a-995c-4e56-99c1-75c4811b62f5@34g2000hsh.googlegroups.com>

On 24 mei, 15:58, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?
>
> In Python, the philosophy "we're all consenting adults here" applies.
> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put. Barriers such as enforced "private"
> attributes will only cause resentment when people, despite your
> anticipations, *need* to access them and are then forced to hack their
> way around them.
>
> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore. This is a string
> signal that the attribute is part of the implementation, not the
> interface. The reader is then on notice that they should not rely on
> that attribute; but they are not *prohibited* from using it if
> necessary to their ends.
>
> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?
>
> Perhaps you're confusing the "encapsulation" and "abstraction"
> principles for enforced access restrictions; they're not.
>
> > Will it ever be added to python?
>
> I hope not.
>
> --
> ?\ ? ? ? ? ? ?"Why was I with her? She reminds me of you. In fact, she |
> ? `\ ? ? ? ? ? ? reminds me more of you than you do!" ?-- Groucho Marx |
> _o__) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?|
> Ben Finney

Well for me, it the ideal way to make sure it contains so 'wrong'
data. You can create getter/setters, and in some cases only a getter
and validate the value given by the user. Then you'll not have to
worry about the data in the rest of your class, which makes life a lot
easier IMO.


From gagsl-py2 at yahoo.com.ar  Mon May 12 06:11:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 07:11:21 -0300
Subject: Is there no single/uniform RDBMS access API module for Python ?
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
	<3de8e1f70805112352j341a3cd2o34d0964499e86271@mail.gmail.com>
Message-ID: <op.ua1c871kx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 12 May 2008 03:52:59 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> Found that SnakeSQL does implement DB2.0 API. However are there such
> implementations for MySQL ?

MySQLdb

-- 
Gabriel Genellina



From zapwireDASHgroups at yahoo.com  Thu May 22 14:21:46 2008
From: zapwireDASHgroups at yahoo.com (Joel Koltner)
Date: Thu, 22 May 2008 11:21:46 -0700
Subject: Producing multiple items in a list comprehension
Message-ID: <5RiZj.165543$ng7.151222@en-nntp-05.dc1.easynews.com>

Is there an easy way to get a list comprehension to produce a flat list of, 
say, [x,2*x] for each input argument?

E.g., I'd like to do something like:

[ [x,2*x] for x in range(4) ]

...and receive

[ 0,0,1,2,2,4,3,6]

...but of course you really get a list of lists:

[[0, 0], [1, 2], [2, 4], [3, 6]]

I'm aware I can use any of the standard "flatten" bits of code to turn this 
back into what I want, but I was hoping there's some way to avoid the "lists 
of lists" generation in the first place?

A slightly similar problem: If I want to "merge," say, list1=[1,2,3] with 
list2=[4,5,6] to obtain [1,4,2,5,3,6], is there some clever way with "zip" to 
do so?

Thanks,
---Joel




From piyush.subscription at gmail.com  Mon May 19 10:01:09 2008
From: piyush.subscription at gmail.com (piyush.subscription at gmail.com)
Date: Mon, 19 May 2008 07:01:09 -0700 (PDT)
Subject: printing class __dict__
Message-ID: <691285ac-b506-4d9a-8a4c-9a7d53dc9438@b9g2000prh.googlegroups.com>

hi,
i am a newbie. so bear wth me
i wrote a program like this
--
class H(object):
 def __init__( self):
  self.data =10
 def e ( self ):
  pass
 def f ( self ):
  pass

class H1(H):
    x2 = 11
    def __init__(self):
        self.x = 10

class details(object):
    def data(self,className):
        print classname.__dict__
        print classname.__name__
        print classname.__bases__

bc = details()
bc.data(H1)

when i run it, i get error like this
NameError: global name 'classname' is not defined

can't i pass 'class' like an 'object'?

any suggestions to access other classes details inside a class?


From davidj411 at gmail.com  Tue May 27 12:00:05 2008
From: davidj411 at gmail.com (David Jackson)
Date: Tue, 27 May 2008 12:00:05 -0400
Subject: convert string number to real number - ValueError: invalid
	literal for int() with base 10: '"2"'
In-Reply-To: <20080228181914.6307257e.darcy@druid.net>
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
Message-ID: <491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>

i used the csv module and saved its contents to a list.

['Date', 'No.', 'Description', 'Debit', 'Credit']
['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']


the credit/debit fields are strings.
what should i have done within the CSV module to make numbers appear as
numbers?
how can i remove the quotes to make them numbers? i realize i posted a
solution to this once before (same posting thread) but i am thinking there
is a better method.



On Thu, Feb 28, 2008 at 7:19 PM, D'Arcy J.M. Cain <darcy at druid.net> wrote:

> On Thu, 28 Feb 2008 14:56:10 -0800 (PST)
> davidj411 <davidj411 at gmail.com> wrote:
> > ValueError: invalid literal for int() with base 10: '"2"'
> >
> >
> > here is the question:
> >
> > How can i convert a string number like "2" to a true number that can
> > be added.
>
> You have to get rid of the double quotes first.
>
> --
> D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
> http://www.druid.net/darcy/                |  and a sheep voting on
> +1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.
>
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From dotancohen at gmail.com  Wed May 14 14:00:20 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 14 May 2008 21:00:20 +0300
Subject: Python and Flaming Thunder
In-Reply-To: <72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>
References: <mailman.1117.1210772083.12834.python-list@python.org>
	<6908kuF2ud4e1U1@mid.uni-berlin.de>
	<72a187b2-503e-452c-bae7-c660ae7e8ad2@x35g2000hsb.googlegroups.com>
Message-ID: <880dece00805141100w7599451etfa1646accb2a7063@mail.gmail.com>

2008/5/14  <castironpi at gmail.com>:
> 8x8 is pretty easy to aim for.  Turn on 16x16, and you're the laptop
> to stand on.  FxF?

I'll see your 16x16 and raise you 32x32. Any number is pretty easy to
aim for when one can arbitrarily invent 2nx2n.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From gherron at islandtraining.com  Thu May 29 04:38:37 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 29 May 2008 01:38:37 -0700
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <483E6B8D.6020307@islandtraining.com>

Dark Wind wrote:
> Hi,
>
> Is there any command in Python which gives the code for a function 
> like just typing the name of a function (say svd) in R returns its code.
>
> Thank you

Nope.

> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From Lie.1296 at gmail.com  Tue May 13 10:58:06 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 07:58:06 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au> 
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au> 
	<482912b7$0$11641$607ed4bc@cv.net>
	<f9e593e2-7b11-4e8f-a604-fbc386cef448@l17g2000pri.googlegroups.com>
Message-ID: <e044ca83-60cb-4cf8-ac75-8b884327d89c@v26g2000prm.googlegroups.com>

On May 13, 9:20?pm, Lie <Lie.1... at gmail.com> wrote:
> On May 13, 11:01?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
>
>
> > Ben Finney wrote:
> > > I think that the idiom
>
> > > ? ? for unused in xrange(10):
> > > ? ? ? ? # do stuff with no reference to 'unused'
>
> > > is quite common. Is that what you're asking about?
>
> > Yes. I was more or less asking about the specific situation of using a
> > for loop to do something X number of times, but I think the more
> > generalized problem that everyone is talking about -- using a counter
> > variable that is never referenced in the loop -- probably puts the point
> > I was trying to make in a better light.
>
> > The reason I even brought this up is because I remember someone saying a
> > while back (probably here on the newsgroup) that the true use of a for
> > loop was to iterate through a sequence (for the purpose of using that
> > sequence), not to do something X number of times. Once they made this
> > comment, I suddenly saw the for loop in a new (and I believe purer)
> > light. That was the first time I realized what it was really meant
> > to do.
>
> > Using something like:
>
> > for unused in xrange(10):
> > ? ? # do stuff 10 times
>
> > suddenly seemed to me like a hackish way to replace
>
> > for (int i=0; i<10; i++) {
> > ? ? // do stuff 10 times;
>
> > }
>
> > Not that I think the above code (C#) looks all that elegant either. But
> > in C# there is a distinction between the above, and this:
>
> > foreach (int i in sequence)
> > ? ? // do something;
>
> > which is more closely related to the Python for loop.
>
> > Now, you could easily make the argument that the Python for loop is a
> > much simpler tool to accomplish *both* of the above, and I suppose that
> > makes sense. Seems a little silly to have two separate for loops to do
> > these things. I just wasn't sure if the "counter" version of the Python
> > for loop was considered slightly unpythonic.
>
> What was unPythonic, I think, as most people would agree, is to use
> for like this:
>
> ?--
> ? ? for i in xrange(len(lst)):
> ? ? ? ? pass
> ?--
>
> In VB, my language before Python, I've never used For Each even for a
> sequence (Array, in VB), it seems too messy back then. Now, with
> Python that only allowed a foreach statement, I realized that I never
> really needed a for i in range(10) at all. Most of the time the places
> where I need to do that is where the code is just a test code that
> loops a certain number of times (with randomized input data), almost
> never (probably never) met that in a real program code. And even in
> some of those cases, the variables are usually used too (as a test
> argument to the function being tested) or for logging purpose.
>
> On May 13, 8:25 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
> (snip)
>
> > I use it quite often, especially if I want to implement a fixed number of
> > retries on a communications channel.
>
> > -Larry
>
> That still have semantic meaning: 'tries'. If it was me, I'll go to
> the trouble of giving names, since I would use it for logging or
> informational purpose ('first try' 'second try' 'third try' 'no more
> try').
>
> I've never really met a real "do something n times" case, where the
> variable doesn't hold any semantic meaning that I don't want to use
> and is not a test case.
>
> For me, a _ (or any other dummy variable[1]) is good enough and it's
> easy to change if later I realized that I actually need to use the
> variable. I agree though, that i, j, k for unused name is a bad choice
> because single letter names is in common usage in mathematics.
>
> [1] PEP 8 is useless if a certain code base has other agreed
> convention, as long as the name used for a unused name in certain code
> base is consistent (and probably documented), it never becomes a
> problem.

On my last message, I'm tempted not to say: "We need to have /dev/null
for Python" though I proved to fail.


From msc at es.aau.dk  Wed May  7 04:29:57 2008
From: msc at es.aau.dk (Martin Sand Christensen)
Date: Wed, 07 May 2008 10:29:57 +0200
Subject: Why don't generators execute until first yield?
Message-ID: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>

Hi!

First a bit of context.

Yesterday I spent a lot of time debugging the following method in a
rather slim database abstraction layer we've developed:

,----
| def selectColumn(self, table, column, where={}, order_by=[], group_by=[]):
|     """Performs a SQL select query returning a single column
|
|     The column is returned as a list. An exception is thrown if the
|     result is not a single column."""
|     query = build_select(table, [column], where, order_by, group_by)
|     result = DBResult(self.rawQuery(query))
|     if result.colcount != 1:
|         raise QueryError("Query must return exactly one column", query)
|     for row in result.fetchAllRowsAsList():
|         yield row[0]
`----

I'd just rewritten the method as a generator rather than returning a
list of results. The following test then failed:

,----
| def testSelectColumnMultipleColumns(self):
|     res = self.fdb.selectColumn('db3ut1', ['c1', 'c2'],
|                                 {'c1':(1, 2)}, order_by='c1')
|     self.assertRaises(db3.QueryError, self.fdb.selectColumn,
|                       'db3ut1', ['c1', 'c2'], {'c1':(1, 2)}, order_by='c1')
`----

I expected this to raise a QueryError due to the result.colcount != 1
constraint being violated (as was the case before), but that isn't the
case. The constraint it not violated until I get the first result from
the generator.

Now to the main point. When a generator function is run, it immediately
returns a generator, and it does not run any code inside the generator.
Not until generator.next() is called is any code inside the generator
executed, giving it traditional lazy evaluation semantics. Why don't
generators follow the usual eager evaluation semantics of Python and
immediately execute up until right before the first yield instead?
Giving generators special case semantics for no good reason is a really
bad idea, so I'm very curious if there is a good reason for it being
this way. With the current semantics it means that errors can pop up at
unexpected times rather than the code failing fast.

Martin


From darcy at druid.net  Fri May  2 11:06:36 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 11:06:36 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <877ieczryn.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.442.1209703470.12834.python-list@python.org>
	<87k5iczvdy.fsf@benfinney.id.au>
	<mailman.456.1209737741.12834.python-list@python.org>
	<877ieczryn.fsf@benfinney.id.au>
Message-ID: <20080502110636.0841dc73.darcy@druid.net>

On Sat, 03 May 2008 00:44:00 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
> > As someone else pointed out, not all the world is Linux.
> 
> It's a good thing I've never implied such to be the case.

You haven't *said* it but you have definitely *implied* it.  Installing
Python in /usr/bin is not common.  It is very specific to your system.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From reid at reidster.net  Mon May 19 20:55:19 2008
From: reid at reidster.net (Reid Priedhorsky)
Date: Mon, 19 May 2008 19:55:19 -0500
Subject: Safely updating master state in SocketServer with ForkingMixIn
Message-ID: <pan.2008.05.20.00.55.19.9461@reidster.net>

Dear all,

I have a TCP server written using SocketServer with ForkingMixIn.
Servicing connections is CPU-bound and can take several seconds.

I now need a way to safely tell the master process to update its state (by
groveling in a PostgreSQL database, potentially for several seconds). How
can I do this safely?

I thought of two ways:

1. Install a signal handler for SIGHUP and update state when that signal
is received.

2. Stop using ForkingMixIn and fork myself, except when "special" requests
come in requesting a state update, which don't fork.

3. Look for the existence of a file after each request, and if it's there
update state.

Option 2 seemed like it would require duplicating a lot of code from
ForkingMixIn, and Option 3 seems kind of lame, so I started down Option 1.
I produced the following code snippets:

   # main loop
   while True:
      server.handle_request()
      global update_required
      if (update_required):
         # update state
         update_required = False

   # signal handler
   def sighup(signum, frame):
      global update_required
      update_required = True

With this code, if the server is idle, SIGHUP causes it to immediately
drop out of handle_request() and execute the state updating block.

Do I have a race condition here? If the master process receives a SIGHUP
after a new connection starts but before a slave process is forked to
handle it, will that connection be messed up (to use highly technical
language)? Otherwise this technique seems compact and elegant.

Are there other options?

Your help would be much appreciated.

Thanks,

Reid


From deets at nospam.web.de  Thu May 29 10:29:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 16:29:56 +0200
Subject: adobe flex; return xml via turbogears/django
References: <mailman.1736.1212070847.12834.python-list@python.org>
Message-ID: <6a7t05F368pqmU1@mid.uni-berlin.de>

Sells, Fred wrote:

> please excuse slightly off-topic; cannot access turbogears mailing list at
> the moment.
> 
> There was an excellent video by James Ward that showed using turbogears to
> return json data to adoble's flex UI.  It simply used
> 
> @expose("JSON")
> def xxxx():
> ...
> return dict(x=1, ...)
> 
> Is there any equivalent for xml, such as
> @expose("XML")
> def ....
> return myElementTreeRoot
> 
> I need to have more attribute data (for a grid) than I can cleanly do in
> json and while pyamf might do the trick, It adds a layer of "magic code"
> that I cannot sell to my team.  Also with xml and json, I can do my UI
> design with the url pointing to a test data file, then build the backend
> to match.
> 
> any ideas?

Why don't you create KID-template like this:

<div py:strip="True">${root}</div>

and in the controller say

@expose("thexmltemplate")
def ...
   return dict(root=myElementTreeRoot)

Diez


From gagsl-py2 at yahoo.com.ar  Mon May 26 20:17:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 21:17:04 -0300
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
References: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>
Message-ID: <op.ubsdqqznx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 May 2008 17:44:28 -0300, sebastian.noack at googlemail.com  
<sebastian.noack at googlemail.com> escribi?:

> is there a way to or at least a reason why I can not use tarfile to
> create a gzip or bunzip2 compressed archive in the memory?
>
> You might might wanna answer "use StringIO" but this isn't such easy
> as it seems to be. ;) I am using Python 2.5.2, by the way. I think
> this is a bug in at least in this version of python, but maybe
> StringIO isn't just file-like enough for this "korky" tarfile module.
> But this would conflict with its documentation.

> def create_tar_file(filenames, fileobj, mode, result_cb=lambda f:
> None):
> 	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
> 	for f in filenames:
> 		tar_file.add(f)
> 	result = result_cb(fileobj)
> 	tar_file.close()
> 	return result

It's not a bug, you must extract the StringIO contents *after* closing  
tar_file, else you won't get the last blocks pending to be written.

-- 
Gabriel Genellina



From george.sakkis at gmail.com  Wed May 14 22:47:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 14 May 2008 19:47:56 -0700 (PDT)
Subject: Nasty gotcha/bug in heapq.nlargest/nsmallest
Message-ID: <66daa0cc-f0df-4282-82b7-ff33617bcbe5@a23g2000hsc.googlegroups.com>

I spent several hours debugging some bogus data results that turned
out to be caused by the fact that heapq.nlargest doesn't respect rich
comparisons:

    import heapq
    import random

    class X(object):
        def __init__(self, x): self.x=x
        def __repr__(self): return 'X(%s)' % self.x
        if True:
            # this succeeds
            def __cmp__(self, other): return cmp(self.x , other.x)
        else:
            # this fails
            def __lt__(self, other): return self.x < other.x

    s = [X(i) for i in range(10)]
    random.shuffle(s)

    s1 = heapq.nlargest(5, s)
    s2 = sorted(s, reverse=True)[:5]
    assert s1 == s2, (s,s1,s2)

    s1 = heapq.nsmallest(5, s)
    s2 = sorted(s)[:5]
    assert s1 == s2, (s,s1,s2)


According to the docs, nlargest is equivalent to: "sorted(iterable,
key=key, reverse=True)[:n]" and similarly for nsmallest. So that must
be at least a documentation bug, if not an implementation one.

George


From gagsl-py2 at yahoo.com.ar  Tue May 13 01:05:00 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 02:05:00 -0300
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua2tqmynx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 May 2008 14:42:30 -0300, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> escribi?:

> On 12 mai, 09:00, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>> En Sat, 10 May 2008 22:12:37 -0300, globalrev <skanem... at yahoo.se>  
>> escribi?:
>>
>> > "Write a program that prints the numbers from 1 to 100. But for
>> > multiples of three print "Fizz" instead of the number and for the
>> > multiples of five print "Buzz". For numbers which are multiples of
>> > both three and five print "FizzBuzz".
>>
>> (We used this question last year - some people gave a sensible answer  
>> in less than 5 minutes,  but others did not even know how to start)
>
> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

For some people, "program" == "form with buttons", excluding all else.  
Maybe it's an education problem - "programming in XXX" courses usually  
focus on the XXX language itself, assuming (sometimes wrongly) that the  
student has a "general programming" background. Worse, I've seen a book on  
VB.net (and I think it's not the only one) that is more focused on "how to  
use Visual Studio" than teaching the language itself, so it's not  
surprising that some people may consider "what's the shortcut to [do some  
visual task]" an important "programming skill".

So I think the FizzBuzz problem is a good test to filter out candidates  
based on (lack of) practical programming skills. But I don't like that it  
is still slightly math-biased (our version said: if multiple of 7 OR ends  
in 7 -> replace with the word "Domingo"). I probably would not reject an  
answer like this:

for n in range(1,100):
   if multiple_of_7(n) or ends_with_7(n): print "Domingo"
   else: print n

even if multiple_of_7 or ends_with_7 are incorrect or have some comment  
like "I don't remember how to check this". The overall structure is OK,  
the guy has decomposed the problem into two smaller subproblems, now it's  
time to ask a domain expert about the details... :)
But the poor guy doesn't know that; he's under a lot of stress, nervous,  
only has a few minutes remaining and surely thinks "I *have* to write this  
in full else I won't get the job!"
I would like to write a similar problem without this non-programming  
distracting issues (that is, a problem simple enough to be answered in a  
few minutes, that requires only programming skills to be solved, and  
leaving out any domain-specific knowledge).

-- 
Gabriel Genellina



From jcn-france1972 at pobox.com  Mon May 26 18:39:51 2008
From: jcn-france1972 at pobox.com (Jean-Claude Neveu)
Date: Mon, 26 May 2008 15:39:51 -0700
Subject: Using poplib to parse headers
Message-ID: <E1K0lMR-00011c-7q@elasmtp-galgo.atl.sa.earthlink.net>

Hello,

I am writing a Python program to check email using POP3. I've tried 
the sample code from python.org, and it works great. In other words, 
the code below successfully prints out my emails.

import getpass, poplib, email
M = poplib.POP3('mail.blah.com')
M.user('username')
M.pass_('password')
numMessages = len(M.list()[1])
for i in range(numMessages):
     for j in M.retr(i+1)[1]:
         print j
M.quit()

However, if I understand right, the Python poplib library will also 
parse the email for me so that I can iterate through the headers, 
body, etc, of each message, and use them in my program. I think the 
method I need to use is email.message_from_file, but I'm having 
difficulty getting it to work. Can anyone explain me how I would 
extend the above example to do this?

I tried to do this by using in the i loop the line:

	message = email.message_from_file(j)

but I get the error: "AttributeError: 'str' object has no attribute 'readline'"

Please forgive this very basic question. I do most of my programming 
in PHP and I'm just getting started with Python.

Many thanks,

J-C



From workitharder at gmail.com  Sat May 24 02:12:53 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:12:53 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
	<03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com> 
	<d8818486-b89c-4faf-8000-5b0ec740d053@w34g2000prm.googlegroups.com>
Message-ID: <3e9098aa-9f0d-4d33-9b08-7dc6cd1b8adc@w8g2000prd.googlegroups.com>

On May 23, 7:00?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 24, 7:14 am, nayden <nay... at gmail.com> wrote:
>
> > the execution fails just after the print statement, and I am not quite
> > sure why is that.
>
> It's often helpful to include the traceback, or at the very least the
> last 3-4 lines of it, as it helps everyone work out the issue you're
> having.
>
> If you're not sure which line in a function is causing the issue, try
> commenting out all but the first, run-and-test, re-add the next, run-
> and-test etc
>
> But the error is most likely this line:
>
> > ? ? i = cPickle.load(str)
>
> cPickle.load unpickles from a file, but here you're handing it a
> string. You want cPickle.loads.
>
> At the interpreter, you can always quickly check these out by looking
> up the docstring via 'help(cPickle.loads)' (or 'cPickle.loads?' if
> you're using iPythhon).
>
> - alex23

It's not a string it's a cStringIO.StringIO, even though his variable
name is confusing.

nayden: 'str' is a built-in variable that is the string type. Try this
for different values of x:
type(x) is str
str(x)
When you override it, it may be confusing down the line.

I'd suggest installing pychecker, which will help you catch errors
like this:
http://pychecker.sourceforge.net/


From arnodel at googlemail.com  Tue May 20 02:43:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 20 May 2008 07:43:53 +0100
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<87y765hitf.fsf@benfinney.id.au>
	<qki434ht7mfbe5qks4o5egbm5bvm31ia1d@4ax.com>
Message-ID: <m2bq318ogm.fsf@googlemail.com>

James A. Donald <jamesd at echeque.com> writes:

> Ben Finney 

> The larger the program, the greater the likelihood of inadvertent name
> collisions creating rare and irreproducible interactions between
> different and supposedly independent parts of the program that each
> work fine on their own, and supposedly cannot possibly interact.
>
>> These errors are a small subset of possible errors. If writing a large
>> program, an automated testing suite is essential, and can catch far
>> more errors than the compiler can hope to catch. If you run a static
>> code analyser, you'll be notified of unused names and other simple
>> errors that are often caught by static-declaration compilers.
>
> That is handy, but the larger the program, the bigger the problem with
> names that are over used, rather than unused.

Fortunately for each file that you group functionality in (called a
'module'), Python creates a brand new namespace where it puts all the
names defined in that file.  That makes name collision unlikely,
provided that you don't write gigantic modules with plenty of globals
in them (which would be very unnatural in Python), and don't use from
mymodule import * too liberally.

Why not download a largish project in Python (a web framework for
instance, since you have a particular interest in this), study the
code and see if your concerns seem founded?

Arnaud

> --
>   ----------------------
> We have the right to defend ourselves and our property, because 
> of the kind of animals that we are. True law derives from this 
> right, not from the arbitrary power of the omnipotent state.

-- 
La propriete, c'est le vol !
                           - Pierre-Joseph Proudhon


From phd at phd.pp.ru  Fri May 30 09:12:22 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Fri, 30 May 2008 17:12:22 +0400
Subject: SQLObject 0.10.2
Message-ID: <20080530131221.GI32657@phd.pp.ru>

Hello!

I'm pleased to announce version 0.10.2, a bugfix release of 0.10 branch
of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.10.2

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.10.1
-----------------

Small Features
~~~~~~~~~~~~~~

* Use VARCHAR(MAX) and VARBINARY(MAX) for MSSQL >= 9.0.

* Run post_funcs after RowDestroySignal.

Bug Fixes
~~~~~~~~~

* Fixed a minor bug in Set column.

* A bug fixed for RowCreatedSignal together with InheritableSQLObject:
  run post_funcs after the entire hierarchy has been created.

* Aggregate functions now honors 'distinct'.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From bborcic at gmail.com  Tue May  6 06:22:31 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Tue, 06 May 2008 12:22:31 +0200
Subject: computing with characters
In-Reply-To: <Xns9A90773D0D544duncanbooth@127.0.0.1>
References: <474df$48180e0b$541fc2ec$12128@cache1.tilbu1.nb.home.nl>
	<481813E2.2030302@islandtraining.com>
	<mailman.360.1209537877.12834.python-list@python.org>
	<61f41$48181d87$541fc2ec$29688@cache3.tilbu1.nb.home.nl>
	<mailman.365.1209541507.12834.python-list@python.org>
	<2d6af$48183337$541fc2ec$23598@cache2.tilbu1.nb.home.nl>
	<87y76vyamr.fsf@physik.rwth-aachen.de>
	<Xns9A90773D0D544duncanbooth@127.0.0.1>
Message-ID: <4820319a_7@news.bluewin.ch>

Duncan Booth wrote:
> Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> 
>> The biggest ugliness though is ",".join().  No idea why this should
>> be better than join(list, separator=" ").  Besides, ",".join(u"x")
>> yields an unicode object.  This is confusing (but will probably go
>> away with Python 3).
> 
> It is only ugly because you aren't used to seeing method calls on string 
> literals.

An obviously independent cause of uglyness is the inconsistency of eg
','.split() and ','.join()

Cheers, BB


From cwitts at gmail.com  Wed May 21 04:39:06 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 21 May 2008 01:39:06 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <ea9dfed7-8f33-4f6e-8c6f-7b893f8dc01b@m45g2000hsb.googlegroups.com>

On May 20, 8:34 pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i  can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
>         do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

mov = open(afile)
for i,line in enumerate(mov):
    if not i: # Enumeration starts at zero so it is the first line
        continue # Use continue to just move to the next iteration if
you
                 # don't want/need to do anything
        # or you can do a check for what you were looking for
        if ':' in line:
            break
    # Alternatively you could do it as
    if not i and ':' in line:
        break

    # Perform your normal operations on the file, not exactly clear
what you
    # want to perform


From afrobeard at gmail.com  Fri May 16 07:13:37 2008
From: afrobeard at gmail.com (afrobeard)
Date: Fri, 16 May 2008 04:13:37 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com> 
	<4ba3a7d9-19a8-4463-981c-dea90ee085fc@24g2000hsh.googlegroups.com>
Message-ID: <c3cfa111-1189-4791-9fc8-944f7e6af68c@d19g2000prm.googlegroups.com>

On May 14, 9:13?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Thanks to the all posters. This will be very useful!

No Problem :). Let me know if you need any code snippets.

P.S. I wouldn't mind working with you to prepare introductory material
and examples for beginners if it becomes public property.


From gray.bowman at gmail.com  Fri May 23 08:17:32 2008
From: gray.bowman at gmail.com (gray.bowman at gmail.com)
Date: Fri, 23 May 2008 05:17:32 -0700 (PDT)
Subject: where is the Write method of ElementTree??
References: <1e111b83-ad85-4e3e-baed-0ddee1255faa@d77g2000hsb.googlegroups.com>
	<4836709E.6000003@behnel.de>
Message-ID: <95225f2a-b572-40ea-9c38-a82987f0da12@a1g2000hsb.googlegroups.com>

On May 23, 3:22 am, Stefan Behnel <stefan... at behnel.de> wrote:
> gray.bow... at gmail.com wrote:
> > I'm messing around with trying to write an xml file using
> > xml.etree.ElementTree.  All the examples on the internet show the use
> > of ElementTree.write(), although when I try to use it it's not
> > available, gives me ...
>
> >    ElementTree(sectionElement).write("section.xml")
> > TypeError: 'module' object is not callable
>
> I guess you did
>
>     from xml.etree import ElementTree
>
> Then you should do this:
>
>     ElementTree.ElementTree(sectionElement).write("section.xml")
>
> sadly, the module names in ET are upper case and look like classes...
>
> Stefan

That was it!  Thanks to both of you for helping.



From gagsl-py2 at yahoo.com.ar  Fri May  9 02:16:08 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:16:08 -0300
Subject: Python Math libraries - How to?
References: <c976d662-13c3-44ed-b9bd-67104a0ee63f@m44g2000hsc.googlegroups.com>
	<fv655i$idi$1@aioe.org> <17127534.post@talk.nabble.com>
Message-ID: <op.uavic6d8x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 13:17:51 -0300, delta2 <marc.messina at sbcglobal.net>  
escribi?:

> I am also using Zelle's book to teach myself programming and Python.  I  
> also
> had a problem with " import math ", but the alternative of " from math
> import * "  is working for me.  I don't know why one works and the other
> doesn't.

Note that they do different things. When you execute `import math`, the  
math module is loaded, but the ONLY new name you get is `math`. If you  
want the sqrt function, you have to use math.sqrt(2)
When you execute `from math import *`, the math module is loaded the same  
as above, but ALL the public names defined in that module are now  
available in the current namespace. So the sqrt function is now available  
simply as sqrt

Note that the form `from xxx import *` is intended mainly for usage in the  
interactive interpreter, for testing and playing only. If you use that  
form from a few modules, the namespace becomes too cluttered, then you  
don't know from where some name is coming, and a later import may  
inadvertidely replace previous names.

-- 
Gabriel Genellina



From sharma.mohit80 at gmail.com  Thu May  1 07:58:06 2008
From: sharma.mohit80 at gmail.com (sharma.mohit80 at gmail.com)
Date: Thu, 1 May 2008 04:58:06 -0700 (PDT)
Subject: buy desktop computers
Message-ID: <d2468de7-262e-442c-985f-aa832da21da0@w5g2000prd.googlegroups.com>

HP Pavilion Desktop with 17 inch LCD Model No: 6310,
Compaq Presario Desktop Model No: 3153,
Zenith Desktop Model No: 203L-XIl
latest desktop computer available  please visit -
http://www.homeshop18.com/shop/u/y/c-Computers-Q-and-Q-Peripherals-S-Desktops/Home_Online-clI_2-cI_919-pCI_909-


From http  Wed May  7 02:00:01 2008
From: http (Paul Rubin)
Date: 06 May 2008 23:00:01 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com> <7xprrz2r42.fsf@ruckus.brouhaha.com>
	<mailman.675.1210104317.12834.python-list@python.org>
Message-ID: <7xej8eirha.fsf@ruckus.brouhaha.com>

"Matt Porter" <mabbikeel at gmail.com> writes:
> > Python's non-GPL license certainly is annoying to some of us.
> I'm intrigued - how can it be annoying?

It means GPL'd contributions can't be included in the main Python distro.


From casey.mcginty at gmail.com  Thu May 15 15:48:06 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Thu, 15 May 2008 09:48:06 -1000
Subject: test
Message-ID: <ae3f58470805151248q5e2ff5dena56acac3ca2b02d5@mail.gmail.com>

test
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20080515/d7ffa202/attachment-0001.html>

From turian at gmail.com  Sat May 10 03:01:35 2008
From: turian at gmail.com (Joseph Turian)
Date: Sat, 10 May 2008 00:01:35 -0700 (PDT)
Subject: Property in derived class
References: <31861d09-a273-45de-bc71-c8591b7722e6@w7g2000hsa.googlegroups.com>
	<7f3a3e02-8207-4661-94fa-48a518720a46@r66g2000hsg.googlegroups.com>
Message-ID: <06653a6f-7bae-4a84-bb62-c8d7e6ec9729@c65g2000hsa.googlegroups.com>

On May 9, 9:05 pm, George Sakkis <george.sak... at gmail.com> wrote:
> Using the overridable property recipe [1],
> [1]http://infinitesque.net/articles/2005/enhancing%20Python's%20property...

Thanks, this is a great solution!

  Joseph


From paul at boddie.org.uk  Fri May  9 11:49:57 2008
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 9 May 2008 08:49:57 -0700 (PDT)
Subject: Cannot install Pypvm (Python Parallel Virtual Machine)
References: <a36320f6-1145-467e-bbb8-bf520420b831@d77g2000hsb.googlegroups.com>
	<68aqoeF2rue80U1@mid.uni-berlin.de>
	<9a66d295-2d05-455b-a825-dd0c75292917@e39g2000hsf.googlegroups.com>
Message-ID: <990f1ad2-75da-4292-a35f-f97baa9da6b5@m36g2000hse.googlegroups.com>

On 9 Mai, 17:22, spectru... at gmail.com wrote:
> Thanks for the reply.
>
> I've found and installed the package containing pvm3.h. (The file is
> now located under "share/pvm3/include/pvm3.h".) But Pypvm can't find
> it.

There is a pvm-dev package in Ubuntu, but it looks like Fedora employs
a different package layout, since pvm-dev seems to have /usr/include/
pvm3.h instead. See here for more details of the Ubuntu package:

http://packages.ubuntu.com/feisty/i386/pvm-dev/filelist

Had the headers been put in /usr/include, you might have been more
fortunate with the rest of the process.

> Someone recommended that I install the equivalent of what is called
> "build-essential" in Ubuntu. I was told that the equivalent can be
> achieved in Fedora like this:
>
> sudo yum groupinstall "Development Tools" --exclude=systemtap --
> exclude=systemtap-runtime

I can only guess what this is doing, but I imagine that it is indeed
somewhat like the Ubuntu build-essential meta-package (which installs
some compilers and headers).

> I don't quite understand what these packages are supposed to do, but
> they don't seem to help.

I would doubt that the default set of compilers and headers would
include PVM stuff - that's somewhat beyond what most developers would
want.

> Can anyone tell me how to make (the installation program for) Pypvm
> understand where the header file is?

Pypvm looks like it offers the old-style Makefile generation procedure
or the new-style distutils procedure. With the old-style approach, you
could edit the Makefile and add some parameters in various places - I
guess you'd put "-Ishare/pvm3/include" on the end of the CFLAGS
variable definition, and "-Lshare/pvm3/lib" on the end of the LDFLAGS
definition. With the new-style approach, you have to persuade
distutils to pick up similar information - some packages employ
setup.cfg files for this purpose, whereas others make you specify
extra options when running setup.py.

Paul


From deets at nospam.web.de  Thu May  8 11:50:28 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 May 2008 17:50:28 +0200
Subject: How to kill Python interpreter from the command line?
References: <10fdb79d-8ac2-4bf3-bbdc-a825ae2c44c8@l42g2000hsc.googlegroups.com>
Message-ID: <68glr3F2t3109U1@mid.uni-berlin.de>

spectrumdt at gmail.com wrote:

> Hello.
> 
> I am running Fedora Linux and KDE, using the Konsole command line.
> 
> When coding Python, I regularly make a bug causing my program to not
> terminate. But how do I kill the non-terminating Python interpreter
> without killing the entire Konsole?
> 
> The default way of killing the current process on the command line is
> Ctrl+C, but that doesn't work with Python. Neither do the "terminate
> task", "suspend task" or "interrupt task" commands (available from
> right-click in Konsole).
> 
> So, can someone please help? How do I kill Python without having to
> restart Konsole?


put it into the background using C-z, and then look for it's pid using ps.
Issue a kill -9 towards it.

For example, I just in the moment use this commandline to do so (for a
certain script named frontend_cherrypy.py:

ps ux | grep frontend | kill -9 `cut -c 5-15`

Diez


From mail at timgolden.me.uk  Thu May 29 09:38:56 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 May 2008 14:38:56 +0100
Subject: [python-win32] How to get all the variables in a python shell
In-Reply-To: <483E650B.5060902@timgolden.me.uk>
References: <b7d41f54-0a1d-406d-8fec-da3a11697258@l28g2000prd.googlegroups.com>
	<483E650B.5060902@timgolden.me.uk>
Message-ID: <483EB1F0.70502@timgolden.me.uk>

[Bizarrely, my mail system seems to be randomly misfiring.
If you've already seen this, please ignore!]

Tim Golden wrote:
Sorry, having seen Roger D's memcached suggestion, I realise I may
have misinterpreted your requirement. I thought that you wanted
a Python interpreter session to share its objects to another window,
hence my IPython suggestion. If you're writing your own console app
and want to share stuff, then there's any number of IPC possibilities.

Roger's already mentioned memcached which I've no more than a
passing knowledge of. But Pyro [1] is often a good bet for these
things, and the pyprocessing [2] module is gaining a fair bit of
traction at the moment. (To name just two out of many).

TJG

[1] http://pyro.sf.net
[2] http://pyprocessing.berlios.de/



From bj_666 at gmx.net  Mon May 12 02:05:14 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 12 May 2008 06:05:14 GMT
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com> <n_OVj.133864$Cj7.40861@pd7urf2no>
Message-ID: <68q50pF2u2t25U2@mid.uni-berlin.de>

On Mon, 12 May 2008 03:40:03 +0000, Yves Dorfsman wrote:

> Paul Rubin wrote:
>
>> You can just use a variable name than you ignore.  It's traditional to
>> use _ but it's not a special keyword, it's just a another variable
>> name:
>> 
>>    y, _, d, _, _, _, _, _, _ = time.localtime()
> 
> But you still have have a variable that's using memory for nothing. I
> find this unsatisfactory...

Get over it?

Or use `operator.itemgetter()`:

In [36]: operator.itemgetter(0, 2)(time.localtime())
Out[36]: (2008, 12)

:-)

Ciao,
	Marc 'BlackJack' Rintsch


From bruno.desthuilliers at gmail.com  Wed May  7 15:18:36 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 12:18:36 -0700 (PDT)
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de> 
	<fvsbgf$mev$1@aioe.org>
	<1693070c-76de-4fa7-8337-155996631fdd@m44g2000hsc.googlegroups.com>
	<fvsdlh$8l3$1@aioe.org>
Message-ID: <efd90def-bbc7-4fdf-b3c0-bb9bccac3add@24g2000hsh.googlegroups.com>

On 7 mai, 16:17, pistacchio <pistacc... at gmail.com> wrote:
> George Sakkis ha scritto:
(snip)
> > What does it matter if it's a single file or a dozen under a package ?
> > "Installation" for pure Python packages can be as simple as copying
> > the package under any directory in your PYTHONPATH.
>
> well, it doesn't matter if it's a single file or a package, but it
> _does_ matter if you have to put them under the path where python is
> installed because, in a typical shared web hosting environment (such the
> one that i use) you don't have access to system directories.

You *never* have to install anything in the default path - install
your python libs wherever you want, and just make sure this wherever
is in your python path (usually via the PYTHONPATH environment
variable).

> > Check out Mako (http://www.makotemplates.org/), it's pretty powerful
> > and fast.
>
> woudl you suggest mako over cheetah?

As far as I'm concerned, I would.  Now if you're looking for a
somewhat barebone MVC framework, you may want to have a look at
web.py.



From castironpi at gmail.com  Tue May 20 09:35:14 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:35:14 -0700 (PDT)
Subject: test mult vars to same value, how to shorten expr?
References: <d3c518fa-0e20-4c39-bb3a-20b6c693036e@w7g2000hsa.googlegroups.com>
	<g0ttd9$elh$03$1@news.t-online.com>
Message-ID: <9ffb2238-fbb6-463a-8108-2b2c73a7dab4@x41g2000hsb.googlegroups.com>

On May 20, 2:08?am, Peter Otten <__pete... at web.de> wrote:
> notnorweg... at yahoo.se wrote:
> > ?if i want o test:
> > if a == 5 and b ==5 and c==5 ... z==5
>
> > is there some synctactic suagr for this?
>
> > rather than maiking one of my own i mean, something built-in like:
> > if a,b,c... z == 5:
>
> if all(x == 5 for x in a,b,c,...):
> ? ?print "yep"
>
> Peter

>>> a,b,c,d=5,5,5,5
>>> import functools
>>> import operator
>>> myequals= functools.partial( operator.eq, 5 )
>>> map( myequals, ( a, b, c, d ) )
[True, True, True, True]
>>> all( _ )
True


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 05:19:34 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 11:19:34 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
	<483406a0$0$10773$426a74cc@news.free.fr>
	<6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>
Message-ID: <48353a94$0$12639$426a74cc@news.free.fr>

Agustin Villena a ?crit :
>> And not that useful - why would one care about the function being
>> defined in class X or Y when one have the exact file and line ?
> 
> I have 3 reasons:
> 
> 1) My developing time is expended running unit tests and browsing
> tracebacks to find which is the real problem. Knowing the offender
> class (instead of the method alone) makes me understand more quickly
> which component of my software is failing.

This is only true when there is an obvious, one-to-one, unambiguous 
relationship between the physical location of the error (file, line) and 
the class of the object the method has been called on. Which is not 
necessarily the case (inheritance, method decoration and monkeypatching 
comes to mind here...).

Also, your above statement seems to imply that component==class, which 
is not the case in Python.

> 2) There are some ocassions where I only have the traceback (e.g. when
> analyzing an app's log) and no inmediate access to teh source code

Ok. But the above still apply...

> 3) And finally, for completeness: If a function is really a method, if
> the traceback show only its name and not the class that defines it,
> for me its a bug, because the method name has no sense out of its
> class.

I'm not sure you really grasp what "methods" are in Python. What you 
define (using the def statement) within a class is function, not a 
method. It only becomes a method when it's looked up on an instance or 
class object, and this 'method' is only a thin wrapper around the 
instance, class and function objects. And FWIW, you don't need to define 
the function within the class to make it a method:

# bar.py
def bar(obj):
   print "function bar.bar called on obj %s" % obj


# foo.py

class Foo(object): pass

# baaz.py
from foo import Foo
import bar

Foo.baaz = bar.bar

def guux(obj):
   print "function baaz.guux called on obj %s" % obj

# main.py
from baaz import Foo
f = Foo()
f.bar()

f.gnix = baae.guux.__get__(f, type(f))
f.gnix()



Not to say that your concerns are pointless, and that things cannot be 
improved somehow, but this is not that trivial, and there may be 
ambuiguities in some not so rare cases.


From gagsl-py2 at yahoo.com.ar  Sun May 25 00:49:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 01:49:20 -0300
Subject: function returns ,
	but variable values has not changed in the interactive prompt
References: <fd1160ac-24c6-4a19-861c-8ed0289bb263@79g2000hsk.googlegroups.com>
Message-ID: <op.ubo00ih3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 16:04:43 -0300, davidj411 <davidj411 at gmail.com> escribi?:

> if you run execfile function to run a python script and that script
> has variables and functions, should't those variable change in the
> interactive prompt too?

Yes, they do:

C:\TEMP>type test.py
a = 123

def foo():
   return "hello"

(enter Python)
py> a = "Old value"
py> a
'Old value'
py> execfile("test.py")
py> a
123
py> foo()
'hello'

-- 
Gabriel Genellina



From nagle at animats.com  Sun May 18 12:42:58 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 18 May 2008 09:42:58 -0700
Subject: Write bits in file
In-Reply-To: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
Message-ID: <4830596e$0$34563$742ec2ed@news.sonic.net>

Monica Leko wrote:
> Hi
> 
> I have a specific format and I need binary representation.  Does
> Python have some built-in function which will, for instance, represent
> number 15 in exactly 10 bits?

    The "struct" module will let you format Python data as a binary
object of specified format.  But it doesn't support arbitrary bit-width
fields; integers can be 1, 2, 4, or 8 bytes.

    If you have a space problem, you might use the "struct" module to
convert to a reasonably concise binary representation, then use the
"gzip" module to compress the file down further.

					John Nagle


From afrobeard at gmail.com  Tue May 13 18:57:56 2008
From: afrobeard at gmail.com (afrobeard)
Date: Tue, 13 May 2008 15:57:56 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <dc4255fc-798b-419d-8fff-5965cf9b8c0a@k13g2000hse.googlegroups.com>

If I were you, I'd show them actual code and how easy it is to get
things done. Showing them how to implement a GTalk Bot[http://
code.google.com/p/pygtalkrobot/] or how to build simple arcade games
with PyGame[http://www.pygame.org/news.html] would harbor much more
interest in my opinion because it'll show them their own power. There
may be some people who oppose this approach under the pretext that
students taking introductory programming courses should be taught C
because it incorporates the discipline that is much needed if they
want to become hard core CS researchers.

Anyways something that you can show and they will like is Frets On
Fire : [http://fretsonfire.sourceforge.net/]. Plus Pixar uses Python
in its rendering pipeline [Linux Mag July 2007].

My 0.02 Republican Credits

On May 13, 10:10?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi



From conrad at lewscanon.com.invalid  Fri May 30 19:11:01 2008
From: conrad at lewscanon.com.invalid (Lew)
Date: Fri, 30 May 2008 19:11:01 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <op.ubzgobgsut4oq5@pandora.alfanett.no>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
Message-ID: <v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>

John Thingstad wrote:
> Perl is solidly based in the UNIX world on awk, sed, bash and C.
> I don't like the style, but many do.

Please exclude the Java newsgroups from this discussion.

-- 
Lew


From mcrobertson at hotmail.com  Tue May  6 18:36:35 2008
From: mcrobertson at hotmail.com (Michael Robertson)
Date: Tue, 06 May 2008 15:36:35 -0700
Subject: open filename with spaces in path
Message-ID: <fvqmhu$2u1$1@skeeter.ucdavis.edu>

I'm having trouble opening a file in linux, whose path has spaces in it.

$ mkdir my\ test
$ echo test > my\ test/test.txt
$ python

 >>> open('./my test/test.txt')
Exception
 >>> open('./my\\ test/test.txt')
Exception

but yet...

 >>> import os
 >>> os.chdir('./my test')
 >>> open('./test')

works just fine.


From lucaspm at dcc.ufba.br  Thu May  8 09:50:07 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Thu, 8 May 2008 10:50:07 -0300
Subject: "prove"
Message-ID: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>

Hello,
How could I "prove" to someone that python accepts this syntax using
the documentation (I couldn't find it anywhere):
classname.functionname(objectname)


From darcy at PyGreSQL.org  Wed May 21 13:19:11 2008
From: darcy at PyGreSQL.org (D'Arcy J.M. Cain)
Date: Wed, 21 May 2008 13:19:11 -0400
Subject: No subject
In-Reply-To: <338512.44068.qm@web39704.mail.mud.yahoo.com>
References: <338512.44068.qm@web39704.mail.mud.yahoo.com>
Message-ID: <20080521131911.9d3b2056.darcy@PyGreSQL.org>

On Wed, 21 May 2008 09:21:05 -0700 (PDT)
ahmed khattab <ahmed_kh1987 at yahoo.com> wrote:
> unsubscribe me form python list plz

Please use the admin interface that you used when you subscribed:

http://mail.python.org/mailman/listinfo/python-list


-- 
D'Arcy J.M. Cain
PyGreSQL Development Group
http://www.PyGreSQL.org


From pataphor at gmail.com  Mon May 19 08:48:03 2008
From: pataphor at gmail.com (pataphor)
Date: Mon, 19 May 2008 14:48:03 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
	<MPG.229a753256adf097989687@nntp.aioe.org>
	<7sm234hp8u9ia850uaopn3amtq95jqbt5t@4ax.com>
Message-ID: <20080519144803.14d3569a@hyperspace>

On Mon, 19 May 2008 06:29:18 -0500
David C. Ullrich <dullrich at sprynet.com> wrote:

> Maybe you could be more specific? Various "positions" I've
> taken in all this may well be untenable, but I can't think
> of any that have anything to do with whether the data should
> be a single list instead of a list of lists.

What's 'untenable' (hey, I tried to get away with a smiley, remember)
is that a matrix is a list of rows. Suppose you do the transpose trick
with the zip(*M) routine, now it's a list of columns. Both views are
equal, there is no getting around the fact that you're holding an
unnatural predisposition towards seeing the matrix as a list of rows,
which it is most definitely not ...

I was holding the brakes for this argument because I realize it's
intuitive and also because Gabriel seems to want a list stay a list if
he assigns something a list. But that's untenable too. Suppose you
assign a column to a list? The list is torn to shreds and placed over
multiple rows.

> (The only way I can parse this to make it relevant is to
> assume that the position you're referring to is that a
> list of lists is better than a single list. If so: First, I
> haven't said that it was. Second, saying "B is untenable"
> is not much of an answer when someone asks why you
> say A is better than B.)

Yes, it was not much of an answer but I was afraid of ending up in
this quagmire. I now see that it is unavoidable anyway if I want to
explain myself. Why couldn't you just see it the same way as me and
leave it at that without waking up all the creatures of hell :-)

> >And to address an 
> >item in a matrix costs two lookups, row and column, while an array
> >needs only one. 
> 
> The phrase "premature optimization" springs to mind.

Well, I really liked your  slicing idea ...

> This is _Python_ we're talking about. Supposing you're right that
> doing two lookups _in Python_ is faster than doing one lookup
> plus the calculuation col + row*width _in Python_, it can't
> make enough difference to matter. In the sort of application I
> have in mind things already happen "instantaneously".

The computation is almost certainly faster. Lookups are expensive.
However I concede the point because we're not supposed to worry about
such stuff. But it *is* a simpler format.

> The point is not to improve on NumPy. Trying to improve on
> NumPy in pure Python code would be silly - if I wanted
> optimized large matrices I'd _use_ NumPy. The point is just
> to give a simple "intuitive" way to manipulate rows and
> columns in small matrices. 

Yes, me too. This is all about intuition.

> So I'm not looking ahead to the future, things are not
> scalable? The thing is not _supposed_ to scale up to
> large matricies. If a person were dealing with large
> matricies then almost all of it would need to be
> rewritten (and if a person were dealing with really
> large matrices then trying to do the thing in pure
> Python would be silly in the first place, and insisting
> on being able to write things like "m.row[0] =
> m.row[1] + m.row[2]" could very well be a totally
> wrong approach to begin with - I'd figure out the
> operations I expected to need to do and write functions
> to do them.)

The reason why I am interested in this is that since I was writing
sudoku algorithms some time ago I have been looking for ways to interact
with data according to different views. I want the data to update even
when I have made changes to them according to another view. In my case
things are even more complex than they are with matrices because I
tend to view sudoku as subcases of binary cubes. Imagine a 3d 9*9*9
chessboard and try to place 81 non-threatening rooks in it. This is not
quite a solution to a sudoku but every sudoku is also a solution to this
problem. 

One of the solution strategies I thought of was forgetting about the 3d
binary cube's content at all, and just update row, column and file
totals (I start with a 'filled' cube and wipe away fields that are
covered by the 'rooks') to drive the optimization. Somehow this seems
possible even though I do not use the cube itself anymore. It just
exists as a figment of my imagination but still it defines the context.

I hope you understand how this was driving me crazy and why I would be
more than happy to return to a safe and sound, actually 'existing' cube,
if only there was a way to access rows, columns and files (for example
sum their elements) as shared data. In the end I realized that
everything I was doing was an abstraction anyway and if that is the
case why not use the simplest possible representation for the data and
let any matrices, rows, columns, files, cubes and so on exist somewhere
higher up in the levels of abstraction of the code.

> Really. In one of the intended applications the matrix
> entries are going to be home-made Rationals. Just
> adding two of those guys takes a long time. It's
> still more than fast enough for the intended application,
> but [oh, never mind.

Too late :-)

> Sorry about the argumentative tone - I _would_ like
> to know which "untenable position" you're referring to...

No, it's no problem. Thanks again for bringing this up. Once I overcame
my initial resistance to bringing up all this old (for me) issues I was
more than happy to share intuitions. I hope this somehow results in a
shared data type. Even just a matrix_with_a_view would be very nice.

P.


From torriem at gmail.com  Mon May 19 16:06:34 2008
From: torriem at gmail.com (Michael Torrie)
Date: Mon, 19 May 2008 14:06:34 -0600
Subject: How do *you* use Python in non-GUI work?
In-Reply-To: <d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
	<d152ef7f-36b3-4f84-a4f1-982da780e10a@p25g2000hsf.googlegroups.com>
Message-ID: <4831DDCA.2050005@gmail.com>

sturlamolden wrote:
> Back in the 'old days' of Unix, programs tended not to be small, could
> only do one thing, and did it well. They had  no gui, and all
> interaction came from command line options. The programs were invoked
> from the command line, and input and output were piped from one
> program to another (input on stdin, output on stdout).

And of course Python is perfect in this area.  A great example is found
here:

> <snip>
> To answer your question: I only add GUIs when I have to. But because
> it seems that people are becoming computer illiterate, incapable of
> using a keyboard, and only comfortable with a certain point-and-click
> input device, it tends to be most of the time now.

Python is excellent for gluing together components with a GUI.  This
preserves the modularity, diversity, functionality, and the ability to
strings things together, but allows a nice easy way to interact with it.
 A great example is a GUI to drive ffmpeg or any number of transcoding
pipelines.  Command line switches are powerful but confusion, and well
beyond my memory.  Yet I prefer transcoders to work this way because I
can string them together in different ways.  Using wxPython or GTK or
PyQT is ideal for bringing these tools together in a useful way.  The
perfect example of how a GUI should function.


From mensanator at aol.com  Sun May 18 20:36:54 2008
From: mensanator at aol.com (Mensanator)
Date: Sun, 18 May 2008 17:36:54 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com> 
	<6fb308f2-a5be-4641-aa04-561b1782c6bb@z72g2000hsb.googlegroups.com> 
	<20080518202516.e858910c.johnjsal@NOSPAMgmail.com>
Message-ID: <c8cff41d-9221-4044-a442-14fa8935387d@d1g2000hsg.googlegroups.com>

On May 18, 7:25?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> On Sun, 18 May 2008 16:17:55 -0700 (PDT)
>
> Mensanator <mensana... at aol.com> wrote:
> > I see no need for GUI in any of these applications.
>
> Yeah, I try to find little projects to write in Python that don't involve a GUI. It's quicker, for one thing, and I also find that there is much more of a focus on the actual problem rather than wasting time trying to get a button positioned just right. :)
>
> Even back when I was using Windows 3.1 and 95, I enjoyed doing stuff in DOS because it made me feel like I was actually getting work done. :)

I see Python as the successor to Turbo Pascal - the DOS
version before Borland fucked it up by making it a GUI IDE.


From cmgui2 at gmail.com  Thu May 22 12:14:54 2008
From: cmgui2 at gmail.com (cm_gui)
Date: Thu, 22 May 2008 09:14:54 -0700 (PDT)
Subject: Python is slow
Message-ID: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>

Python is slow.    Almost all of the web applications written in
Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
Google Apps is not faster.   Neither is Youtube.
Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
than Python.
Okay, they probably use caching or some code compilation -- but Google
Apps and those Zope sites probably also use caching.

I've yet to see a web application written in Python which is really
fast.


From ghirai at ghirai.com  Mon May 19 19:44:50 2008
From: ghirai at ghirai.com (Ghirai)
Date: Tue, 20 May 2008 02:44:50 +0300
Subject: Newbie: Keep TCP socket open
In-Reply-To: <D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
	<mailman.1364.1211234091.12834.python-list@python.org>
	<D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
Message-ID: <20080520024450.4a2bd270.ghirai@ghirai.com>

On Mon, 19 May 2008 23:50:50 +0100
"Alan Wright" <alan.wright at volubill.com> wrote:

> Ghirai,
> Scapy does the same, only it sends RST and not FIN, so still no help
> 
>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
> 
> Only have windows at the moment sadly.
> 
> Alan
> 

Are you sure there's no firewall or something else between you and the
remote host?

Because i just tried that command with scapy and it didn't send any other packets
except what it was told (1 packet with SYN flag set).

I haven't tried on windows though.

-- 
Regards,
Ghirai.


From george.sakkis at gmail.com  Thu May 15 08:40:28 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 15 May 2008 05:40:28 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
Message-ID: <55de611d-e484-4373-a485-35925a68919c@8g2000hse.googlegroups.com>

On May 15, 8:27?am, globalrev <skanem... at yahoo.se> wrote:
> i have a big collection of .txt files that i want to open and parse to
> extract information.
>
> is there a library for this or maybe even built in?

This has a lot to do with how well-structured are your files and what
kind of information you hope to extract (shallow or deep). NLTK might
be a good starting point: http://nltk.sourceforge.net/

George


From fuzzyman at gmail.com  Mon May 19 08:37:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Mon, 19 May 2008 05:37:17 -0700 (PDT)
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <3f8cbc1a-69af-4b75-bbf6-c9f21689974e@f36g2000hsa.googlegroups.com>

On May 19, 8:32 am, sandeep <shiningsa... at gmail.com> wrote:
> hi all
>
> i am very much a newbie to python but has some experience of
> development.i am trying to write a script which will loop through the
> outlook 2003 inbox and save the email data in an simple data.html page
> and save all the attachments in a folder name emails.after some
> initial struggling i am able to write this script.but now i want to
> create the exe file of this script.i have used py2exe for this job and
> created the exe. but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here. i am using python2.5 and is using
> py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
> service pack2.
>
> thanks and reagrds
> sandeep kumar sharma


You'll need to post the actual errors you get for people to be able to
help. You might find posting to the py2exe mailing list useful.

All the best,


Michael Foord
http://www.ironpythoninaction.com/


From jkrukoff at ltgc.com  Thu May 15 11:06:32 2008
From: jkrukoff at ltgc.com (John Krukoff)
Date: Thu, 15 May 2008 09:06:32 -0600
Subject: no inputstream?
In-Reply-To: <974fe6b4-7e53-4a5f-bd66-6b40aa718d5d@34g2000hsh.googlegroups.com>
Message-ID: <002c01c8b69d$438fd700$c31ea8c0@naomi>

> -----Original Message-----
> From: python-list-bounces+jkrukoff=ltgc.com at python.org [mailto:python-
> list-bounces+jkrukoff=ltgc.com at python.org] On Behalf Of max
> Sent: Thursday, May 15, 2008 8:02 AM
> To: python-list at python.org
> Subject: Re: no inputstream?
> 
> On May 15, 9:51?am, castironpi <castiro... at gmail.com> wrote:
> > On May 15, 8:37?am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> >
> > > On Thu, 15 May 2008 06:08:35 -0700, max wrote:
> > > > i currently have locations of the mp3s in question as strings, which
> > > > works for parsing local files, but gives me a "No such file or
> > > > directory" error when it tries to process URLs. ?it seems terribly
> > > > inefficient to download each mp3 just to get at that small tag data,
> > > > and i assume there's a way to do this with file() or open() or
> > > > something, i just can't get it to work.
> >
> > > You can use `urllib2.urlopen()` to open URLs as files. ?But if you
> deal
> > > with ID3 V1 tags you'll have to download the file anyway because those
> are
> > > in the last 128 bytes of an MP3 file.
> >
> > > Ciao,
> > > ? ? ? ? Marc 'BlackJack' Rintsch
> >
> > Just don't import time. ?What would you do with an autolocking timer,
> > such as time.sleep( ) on a thread? ?I am tongue tied in the presence
> > of a lady.
> 
> thanks guys.  i guess i just figured there'd be a way to get at those
> id3 bytes at the end without downloading the whole file.  if java can
> do this, seems like i should just stick with that implementation, no?
> --
> http://mail.python.org/mailman/listinfo/python-list

First off, ignore castironpi, it's a turing test failure.

Second, I'm curious as to how Java manages this. I'd think their streams
would have to be pretty magic to pull this off after the HTTP connection has
already been built.

Anyway, as I see it, this is more of a HTTP protocol question. I think what
you need to do is set the HTTP Range header to bytes=-128, see the urllib2
documentation for how. It's not that hard. Only down side is that not all
HTTP servers support the Range header, and it's an optional part of the HTTP
spec anyway. As far as I know it's the only way to get partial transfers,
though.

Also, are you sure you're dealing with v1 tags and not v2? Since v2 tags are
stored at the beginning (or sometimes end with v2.4) of the file. You might
be better off just opening the file with urllib2 and handing it off to
whatever id3 tag reading library you're using. As long as it's reasonably
smart, it should only download the part of the file it needs (which if the
tag happens to be v1, will be the whole file).

I'd love to know how Java handles all that automatically through a generic
stream interface, though.
--
John Krukoff
jkrukoff at ltgc.com



From gagsl-py2 at yahoo.com.ar  Sun May 25 22:51:48 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 23:51:48 -0300
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
	<ae3f58470805210344v6008ef2bkefb6ef32dd95b87d@mail.gmail.com>
	<op.ubon52tax6zn5v@a98gizw.cpe.telecentro.net.ar>
	<ae3f58470805251546x3fc2df29y4f353802f634ce8b@mail.gmail.com>
Message-ID: <op.ubqp8mn1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 19:46:50 -0300, Casey McGinty <casey.mcginty at gmail.com> escribi?:

> On Sat, May 24, 2008 at 2:11 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
> wrote:
>
>> > 2. In the top of your package directory it is typical to have a module
>> name
>> > '_package.py'. This is ideally where the main command line entry point
>> for
>> > the package code should be placed.
>>
>> Why the underscore? And I usually don't put executable scripts inside a
>> package - I consider them just libraries, to be imported by other parts of
>> the application.
>> It's easier to test too when your tests *and* the application code are
>> external to the package itself.
>>
>
> Ok, guess using the '_package' name is not very common. I saw it used by the
> dbus module. My whole concern here is that using a script will fragment your
> application code across the file system. I would prefer to have it all in a
> single spot. So I still like they idea of keeping most of application code
> (argument parsing, help output, initialization) inside of the package. The
> '_' should indicate that any other modules using your package should import
> that module.

Not only using _package isn't very common - it goes against the general rule (this one very well established) that names with a single leading _underscore are private (implementation details). So I would *not* expect to import _package as a rule.
I don't think splitting the application in two or more parts ("fragmentation" as you call it) is a bad thing by itself; the package will likely appear under some-python-directory/site-packages/your_package_name (where anyone would search for it) and the executable scripts on /usr/bin (where anyone would likely search for it too).

-- 
Gabriel Genellina



From tobik0000 at vp.pl  Fri May  9 12:56:11 2008
From: tobik0000 at vp.pl (tobik0000 at vp.pl)
Date: Fri, 9 May 2008 09:56:11 -0700 (PDT)
Subject: BEST VIDEO
Message-ID: <28009d96-3e71-4a6b-bf57-d1e2fd689c22@x41g2000hsb.googlegroups.com>

Best Video!!!! sexi !! *-*!!
http://rozrywka.yeba.pl/show.php?id=2073
http://rozrywka.yeba.pl/show.php?id=2079


From gagsl-py2 at yahoo.com.ar  Sun May  4 20:14:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 21:14:15 -0300
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
Message-ID: <op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 12:58:25 -0300, Duncan Booth <duncan.booth at invalid.invalid> escribi?:

> Szabolcs Horv?t <szhorvat at gmail.com> wrote:
>
>> I thought that it would be very nice if the built-in sum() function used
>> this algorithm by default.  Has this been brought up before?  Would this
>> have any disadvantages (apart from a slight performance impact, but
>> Python is a high-level language anyway ...)?
>
> There's a thread you might find interesting:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a
>
> In that thread I suggested that Python ought to implement sum by adding
> together each pair of values, then each pair of results and so on. This
> means that for input values of a similar magnitude the intermediate results
> stay balanced. The implementation doesn't actually do all the first level

Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement. But if you know that you're adding floating point numbers you can use whatever algorithm best fits you. Or use numpy arrays; I think they implement Kahan summation or a similar algorithm.

-- 
Gabriel Genellina



From nik600 at gmail.com  Mon May 26 06:45:26 2008
From: nik600 at gmail.com (nik600)
Date: Mon, 26 May 2008 12:45:26 +0200
Subject: integration with browser
Message-ID: <9469c3170805260345s7c8ab68fyedf700bad96dc57e@mail.gmail.com>

Hi to all

i'd like to create a window that integrates a browser control, the
browser control must support html, javascript and css.

Is possible to include something that uses the same engine of firefox?

Thanks to all in advance

-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/reportmaker
https://sourceforge.net/projects/nikstresser


From rupole at hotmail.com  Tue May 13 18:51:23 2008
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 13 May 2008 18:51:23 -0400
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <g0d61d$52u$1@ger.gmane.org>


<yguan08 at gmail.com> wrote in message
news:411ca062-faa9-4635-8d69-90e69f465729 at z72g2000hsb.googlegroups.com...
>I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
>
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> fsize = os.path.getsize(fullpath)
>
>
> WindowsError: [Error 206] The filename or extension is too long:
>
> The same thing with os.stat(fullpath).
>
> I tried using the relative path, but it does not work with the message
> fname not found.
>
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)
> filesize = os.path.getsize(fname)
>
> Is there a walk around of this?

You need to use the '\\?\UNC\' prefix and specify the path
in unicode (Python 2.5 and up).

            Roger






From aaron.watters at gmail.com  Fri May  2 10:56:20 2008
From: aaron.watters at gmail.com (Aaron Watters)
Date: Fri, 2 May 2008 07:56:20 -0700 (PDT)
Subject: Cookie Confusion - How to Set a Cookie
References: <588d6a6c-0080-48a4-b768-e2c5ef551790@s50g2000hsb.googlegroups.com>
	<cc4194a8-ca9f-4e91-a67d-8096d717e165@b64g2000hsa.googlegroups.com> 
	<bb13634a-ff00-49c1-b07b-34ea4dd448d7@a70g2000hsh.googlegroups.com> 
	<94d81004-fc6d-4ff9-9500-143864a6d7a7@f63g2000hsf.googlegroups.com> 
	<eb94abcb-3172-458c-beba-65680b307818@b64g2000hsa.googlegroups.com>
Message-ID: <7fdb3e13-392d-4b83-83f6-ef554110d8e8@x41g2000hsb.googlegroups.com>

On May 1, 9:02 am, cbh... at gmail.com wrote:
> On Apr 29, 3:35 pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
>
>
>
> > > Thanks for the code, Aaron.  I will give it a try.
>
> > > I've been reading some more about cookielib and am not sure whether I
> > > should use Cookie or cookielib.  This is what I want to do:  a user is
> > > going to login.  Upon a successful login, I want to write their name
> > > and date/time of visit to a cookie file. Which is the correct python
> > > module to use?
>
> > Cookie does parsing and generation of cookie strings
> > for server-side applications like your CGI script.
>
> > The cookielib module
> > is designed for either implementing a client like a web browser
> > or emulating a client/browser (for web scraping, for example).
>
> > I think you want to use Cookie.
> > The distinction could be made clearer in
> > the docs, imho.
>
> > Also, when you say "write the cookie file" I think you mean
> > "store the cookie to the client browser".  This should happen
> > automatically when you send the cookie header to the client
> > correctly (if the client is configured to cooperate).
>
> >   -- Aaron Watters
>
> > ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=default+does+n...
>
> Sorry for the slow replies.  I've been in & out with a sick child.
>
> I'm used to my javascript cookies.  They are automatically written to
> a cookie.txt file in a .mozilla dir under my user.  When I say to
> 'write the cookie file' this is what I was referring to.  I was
> expecting my python cookie to automatically get written to the same
> file.  I have't seen this happen yet.

Hmmm.  I don't know how cookies are stored on the client.
I recommend using the standard cgi debug
environment dump after setting
a cookie to see if the cookie is coming back to the server.
If it is not something is wrong -- you are setting it incorrectly,
or the server or client is blocking the cookie.

Note if you are testing on one machine: some browsers
and servers have by default
special security restrictions on
"localhost" loopbacks -- it may be that this is causing
either the server or the client to ignore the cookie.

  -- Aaron Watters
===
http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=cooked


From inhahe at gmail.com  Wed May 28 05:36:07 2008
From: inhahe at gmail.com (inhahe)
Date: Wed, 28 May 2008 05:36:07 -0400
Subject: Problem with py2exe
References: <114d8694-0d1d-4917-809d-a3d7b6443487@j33g2000pri.googlegroups.com>
Message-ID: <tG9%j.82625$%15.73337@bignews7.bellsouth.net>

i used py2exe with python 2.5 and it worked fine just the other day. 
py2exe-0.6.6.win32-py2.5.exe was the download filename.

<subhabrata.iisc at hotmail.com> wrote in message 
news:114d8694-0d1d-4917-809d-a3d7b6443487 at j33g2000pri.googlegroups.com...
> Dear Members of the group,
> py2exe does not seem to be integrating with 2.5 or later versions.
> I was trying to run it but requested only for 2.3.
> How can I run it?
> If any one can kindly help.
> Regards,
> Subhabrata Banerjee. 




From efurman at admailinc.com  Fri May 16 14:46:54 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Fri, 16 May 2008 10:46:54 -0800
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <482DD69E.6030303@admailinc.com>

Johny wrote:

>Is there a module for reading/modifing db files from Python?
>Thanks for help
>B.
>--
>http://mail.python.org/mailman/listinfo/python-list
>  
>
I'm switching my company's software base over from FoxPro 6 to Python.  
As part of that effort I have written (and am still enhancing :) a 
dbf.py module which reads/writes both dBase III and FoxPro tables. 

Index files are not supported, but the table can be sorted by any 
combination of fields after being opened. 

dBase III table/memo support is complete, but FoxPro field types 
Currency, Double, General, and Picture are not supported and those 
fields are stripped out when opened, and will not be in any saved 
version of that table.  At this point, the dbf file itself is read into 
memory, all updates are held in memory, and the table is only written to 
disk when the Save method is called.

Record navigation can be sequential or random, and Top, Bottom, Next, 
and Previous are supported.

Searching is supported, using (or not) deleted records is supported, 
adding and deleting fields is supported, saving as a csv file, and more.

Let me know if you'd like the module.  Hope this helps.

Sample session follows...

 >>> import dbf
 >>> table = dbf.DbfTable('newtable','name C(10), age N(3.0), wisdom M')
 >>> print table

        Table: newtable.dbf
        Type:  dBase III Plus
        Last updated:  2008-05-16
        Record count:  0
        Field count:   3
        Record length: 24

        --Fields--
        name C(10)
        age N(3.0)
        wisdom M(10)

 >>> table.Append()
 >>> table.name = 'Ethan'
 >>> table.age = 37
 >>> table.wisdom = 'Python rules!'
 >>> table.Scatter()
{'age': 37, 'name': 'Ethan', 'wisdom': 'Python rules!'}
 >>> table.GetField('name')
'Ethan'
 >>> table[0]
 Ethan      37         1
 >>> record = table[0]
 >>> record.name
'Ethan'
 >>> record.wisdom
'Python rules!'
 >>> record.age = 40
 >>> record
 Ethan      40         1
 >>> table[0]
 Ethan      40         1
 >>> table.Append({'name':'Lori', 'age':45, 'wisdom':'happy gardens make 
a happy wife'})
 >>> table.Scatter()
{'age': 45, 'name': 'Lori', 'wisdom': 'happy gardens make a happy wife'}
 >>> for record in table:
...   print record.name, record.wisdom
...
Ethan Python rules!
Lori happy gardens make a happy wife
 >>>




From kyosohma at gmail.com  Mon May 19 10:14:00 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Mon, 19 May 2008 07:14:00 -0700 (PDT)
Subject: distutils directory problem
References: <g0q3nr$iah$1@aioe.org>
Message-ID: <5ed44048-1f13-4972-9aaf-8f3e80aec0a4@8g2000hse.googlegroups.com>

On May 18, 3:31?pm, Martin Manns <mma... at gmx.net> wrote:
> Hi,
>
> I have the following problem with the distutils package:
> (I have now spent hours reading and searching the manuals and tutorials,
> and I am still stuck.)
>
> I have a working directory
> ~/pyspread
> in which my libraries are situated and two icons directories
> ~/pyspread/icons and ~/pyspread/icons/actions
>
> Now I would like to create a setup.py file inside my ~/pyspread
> directory that installs my .py modules in .../site-packages/pyspread
> and the icons in appropriate sub-folders and adds pyspread.pth to
> .../site-packages so that .../site-packages/pyspread is in the
> PYTHONPATH.
>
> However, my setup.py puts everything ?(including .pyc files) into
> site-packages *and* into the sub-folders. What am I doing wrong?
>
> I am looking for a platform-independent solution. Currently, I am using
> python 2.5 on Linux.
>
> Here my setup.py
>
> #!/usr/bin/env python
>
> from distutils.core import setup
> setup(name='pyspread',
> ? ? ? version='0.0.7',
> ? ? ? description='A spreadsheet that accepts a pure python expression in each cell.',
> ? ? ? license='GPL v3 :: GNU General Public License',
> ? ? ? classifiers=[ 'Development Status :: 3 - Alpha',
> ? ? ? ? ? ? ? ? ? ? 'Intended Audience :: End Users/Desktop',
> ? ? ? ],
> ? ? ? author='Martin Manns',
> ? ? ? author_email='mma... at gmx.net',
> ? ? ? url='http://sourceforge.net/projects/pyspread/',
> ? ? ? packages=['pyspread'],
> ? ? ? package_dir={'pyspread': '.'},
> ? ? ? scripts=['pyspread.py'],
> ? ? ? py_modules=['pyspread.mainapp', 'pyspread.pysgrid', 'pyspread.mygrid','pyspread.icontheme'],
> ? ? ? package_data={'pyspread': ['icons/*.png', 'icons/actions/*.png' ,\
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?'test.pys', 'test.csv', 'test2.csv', \
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?'README', 'COPYING']},
> )
>
> Thanks in advance
>
> Martin

I highly recommend re-posting this to the distutils group. They have
some excellent people over there that can probably tell you quite
quickly what the issue is:

http://mail.python.org/mailman/listinfo/distutils-sig

Mike


From 42flicks at gmail.com  Tue May 13 06:30:44 2008
From: 42flicks at gmail.com (Mike)
Date: Tue, 13 May 2008 22:30:44 +1200
Subject: feedparser
Message-ID: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com>

Hello,

I'm trying to use the feedparser module (http://www.feedparser.org/).

Is it possible to use this without running the setup program?

I don't see why not, seems like I'm missing something obvious.

My directory structure is:

myprogram.py
    /feedparser
        /feedparser.py

I know I can install the module in the modules directory but would like to
avoid this for two reasons: I'm only using it for the one project so would
like to keep it seperate, and if I move to a shared host I may not be
allowed to install additional modules (not sure if this is correct though).

I've tried:

import feedparser

import feedparser.feedparser

from feedparser import feedparser

What am I doing wrong? :)

Cheers!
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From wicijowski at gmail.com  Mon May 19 09:01:03 2008
From: wicijowski at gmail.com (janislaw)
Date: Mon, 19 May 2008 06:01:03 -0700 (PDT)
Subject: How do *you* use Python in non-GUI work?
References: <20080518182022.990193bd.johnjsal@NOSPAMgmail.com>
Message-ID: <03a01d74-d38c-4963-b6dd-cdfed3831a00@j22g2000hsf.googlegroups.com>

On May 19, 12:20?am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hey all. Just thought I'd ask a general question for my own interest. Every time I think of something I might do in Python, it usually involves creating a GUI interface, so I was wondering what kind of work you all do with Python that does *not* involve any GUI work. This could be any little scripts you write for your own benefit, or what you do at work, if you feel like talking about that! :)
>
> Thanks.

- Programs creating C and VHDL source files
- Scipy scripts generating charts

Jan Wicijowski


From gandalf at shopzeus.com  Fri May  2 11:17:10 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 02 May 2008 17:17:10 +0200
Subject: no cleanup on TERM signal
In-Reply-To: <481AE605.50102@cheimes.de>
References: <WSwSj.236857$pM4.38686@pd7urf1no> <481AE22E.3040906@shopzeus.com>
	<481AE605.50102@cheimes.de>
Message-ID: <481B3076.1020903@shopzeus.com>


> You can replace the try/finally code with a "with resource:
> do_something()" block if the object supporst the context manager protocol.
>   
I'm using 2.4 so...
> If you want to run some code during the shutdown phase of the Python
> process you can register a callback function in the "atexit" module.
>   
I also wanted to tell this to the OP but he was asking about signals. 
AFAIK atexit is only called on SIGTERM, not on others.
> Do NOT mix threads and signals. It's usually a very bad idea and may
> lead to surprising side effects. Signals are only handled by the main
> thread.
>   
Well, I have to, because:

#1. I have a server that uses threads. Using fork() instead of threading 
would be a nightmare in my case.
#2. It must support signals, just because some users tend to use things 
like "killall python" and try/finally is not useful in those cases. I 
cannot do anything to prevent the users killing the server. They will 
just do it...

I know that signals are handled in the main thread only. This is why I'm 
using a threading.Event() object to allow all threads shut down 
cooperatively: sigterm will set the event, and then all threads 
(including the main thread) will exit gracefully (within a given 
timeout). Do you know a better solution?

Thanks,

   Laszlo



From deets at nospam.web.de  Fri May  2 09:52:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 May 2008 15:52:47 +0200
Subject: is +=1 thread safe
In-Reply-To: <Xns9A9255EE37A96duncanbooth@127.0.0.1>
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de>
	<Xns9A9255EE37A96duncanbooth@127.0.0.1>
Message-ID: <680kliF2q3c3lU1@mid.uni-berlin.de>

Duncan Booth schrieb:
> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> 
>> On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:
>>
>>> Of course it's not thread safe.   For the same reason and more basic, 
>>> even the expression i++ is not thread safe in C++.
>>>
>>> Any such calculation, on modern processors, requires three operations: 
>>>   retrieve value of i into a register,
>>>   increment the register
>>>   write the value into i.
>> There are no modern processors with an opcode for incrementing a memory
>> location!?  At least my C64 can do that.  ;-)
>>
> The operation i++ in C/C++ implies two things: it increments the memory 
> location and returns the new result. That means there are at least two ways 
> to generate code for this:
> 
>    increment memory
>    load new value
> 
> or
> 
>    load value
>    incremenent
>    store
> 
> Neither of these is going to be thread-safe (even on a C64) unless you 
> protect the operations somehow. The latter is probably preferred as it only 
> implies two operations to memory whereas the former implies three.

This is not entirely right. increment is usually atomic (at least for 
single-core processors), so you don't suffer from a load/store being 
interrupted.

Of course it can happen that the previous or later loading of the value 
for computational purposes is interrupted by another thread. But you 
have the guarantee that all incs (and decs) are counted, in contrast to 
what the OP observed with python.

Diez


From deets at nospam.web.de  Wed May 28 17:19:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:19:15 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
Message-ID: <6a60ioF360u5uU1@mid.uni-berlin.de>

> Kind of like how this year's program won't work on next year's
> Python?

For somebody who has admitted to have only very rudimentary knowledge of 
python that's a pretty bold statement, don't you think?

>  Except Flaming Thunder is faster. ;)


Faster in execution speed for a very limited domain of problems - maybe.

But unless it grows support for structured data types, arrays and maybe 
even an object system - it's nothing but a toy language.

Diez


From arnodel at googlemail.com  Sat May  3 02:36:13 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 03 May 2008 07:36:13 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
	<67vs9qF2r409aU2@mid.uni-berlin.de> <m21w4kbm4l.fsf@googlemail.com>
	<682e9cF2qodffU1@mid.uni-berlin.de>
Message-ID: <m2lk2r6giq.fsf@googlemail.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Fri, 02 May 2008 19:23:54 +0100, Arnaud Delobelle wrote:
>
>> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
>> 
>>>
>>> There are no modern processors with an opcode for incrementing a memory
>>> location!?  At least my C64 can do that.  ;-)
>> 
>> Indeed!  I remember a simple use was to make the border change colour
>> very fast, a v. cool effect when you're 12!
>>  
>>         CLV
>> LOOP:   INC $D020
>>         BVC LOOP
>> 
>> (from memory, untested!)
>
> That works but I think
>
> LOOP:	INC $D020
> 	JMP LOOP
>
> is a bit more straight forward.  Shorter in opcodes, equal in bytes, the
> loop is as fast but you save the two cycles of the CLV.  :-)

Ah you're right!  I thought I remembered that Bxx instructions took 2
cycles whereas a JMP takes 3.  I've checked it on the wonderful wide
web and Bxx takes 2 cycles if the branch fails, but 3 cycles if the
branch succeeds :) (or even 5 if it branches to a new page).

To bring this back on topic, I would qualify my code snippet as more
"Pythonesque" than yours ;)

-- 
Arnaud


From deets at nospam.web.de  Wed May 14 09:43:21 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 May 2008 15:43:21 +0200
Subject: Python and Flaming Thunder
References: <mailman.1117.1210772083.12834.python-list@python.org>
Message-ID: <6908kuF2ud4e1U1@mid.uni-berlin.de>

>>> That's also a myth.  For example, if C is easy to maintain, why is
>>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
>>> the world?  There should be lots of single-asset 8-by-8 shotgun cross
>>> compilers written in C, if C is easier to maintain.
>>Not only is it the world's only "single-asset 8-by-8 shotgun cross
>>compiler," but according to google, it's also the world's only "shotgun
>>cross compiler" period.  But I guess if you make up your own terminology
>>you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
>>single-asset 8x8 shotgun cross compiler, and what makes that of any
>>value to me?
> 
> The web page explains.  It's a compiler that runs on 8 platforms and can
> generate executables for any of them on any of them.  It's not _totally_
> clear about what "single-asset" means, but it gives the impression (and
> the term somewhat suggests) that this means there's a single executable
> that does all of this (compare to gcc's design, where support for cross
> compiling to another arch is provided by a separate executable).

Which isn't too hard if all you have are simple datatypes as a handfull
numerical types + strings. 

Besides, from what I see, the supported platforms all are x86, 32bit &
64bit. And I bet GCC works pretty unmodified amongst these as well - only
binary formats differ. But let Flaming Thunder grow a library system with
dynamic loading, and I wonder how well his crosscompiler works..



Diez


From bblais at bryant.edu  Thu May  8 08:09:40 2008
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 8 May 2008 08:09:40 -0400
Subject: framework build question for mac
Message-ID: <4349B4C2-75A3-48B3-A9B1-CE5047B98BEC@bryant.edu>

Hello,

I just had to install an older version of python for a particular  
app.  Afterward, I had some necessary clean-up so that my normal work  
python would work, but I noticed something odd about the  
installation.  Python is installed on the Mac in the directory

/Library/Frameworks/Python.framework/Versions

where there is (now) a 2.5 and a 2.4 directory, and a link called  
Current which points to the 2.5 directory.  So far, so good.  Now,  
the python binary (as well as idle, and some other python related  
binaries) are in /usr/local/bin and are links:

python@ -> ../../../Library/Frameworks/Python.framework/Versions/2.5/ 
bin/python
pydoc@ -> ../../../Library/Frameworks/Python.framework/Versions/2.5/ 
bin/pydoc
python2.4@ -> ../../../Library/Frameworks/Python.framework/Versions/ 
2.4/bin/python2.4
etc...

Now, what I find odd is that the generic binaries (python, pydoc,  
etc...) as opposed to the version-specific binaries (python2.4,  
python2.5, etc...) do not point to the Current link in the /Library/ 
Frameworks/Python.framework/Versions/ directory, but instead point to  
the last python installed.  As a result, in addition to re-pointing  
the Current link, I also had to manually re-point python, pydoc,  
idle, etc... in /usr/local/bin

Is there a reason for this, or is it just a small oversight on the  
install script?


			thanks,

				Brian Blais


-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais



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From tjreedy at udel.edu  Mon May 19 09:36:46 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 May 2008 09:36:46 -0400
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <g0rvpc$57c$1@ger.gmane.org>


<ivarnelispam at gmail.com> wrote in message 
news:960da03c-1edf-4fa4-b434-6656e8a8884f at e39g2000hsf.googlegroups.com...
| Hello all,
|
| I'm starting work on what is going to become a fairly substantial
| Python project, and I'm trying to find the best way to organize
| everything. The project will consist of:
|
| - A few applications
| - Several small scripts and utilities
| - Unit tests and small interactive test programs
| - A number of custom libraries and modules that may be shared and
| referenced among all of the above
|
| I have the following general structure in mind:
|
| myproject/
|  app1/
|    main.py

If you put myproject in Pythonxy/Lib/site-packages, there is no need to 
fiddle with PYTHONPATH or sys.path.  In 3.0a5 I tried a relative import and 
got a message that relative imports only work within packages, not modules. 
I presume that means package.__init__.py.  Maybe I just miswrote the 
import, but I decided to stick with what dependably works whether from 
within or without the package
from package.subpackage import module  #or
from package.subpackage.module import object.

I agree with the comment about removing the 'shared' package layer.
Two packages deep is enough typing unless the deeper hierarchy is needed 
(like possibly the 'tests' subsubpackages, if they make running the tests 
easier).

tjr





From mensanator at aol.com  Sat May 10 23:24:32 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 10 May 2008 20:24:32 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
Message-ID: <bf7df546-1c97-4b86-92d8-a0fa0f551dfe@d77g2000hsb.googlegroups.com>

On May 10, 8:12?pm, globalrev <skanem... at yahoo.se> wrote:
> http://reddit.com/r/programming/info/18td4/comments
>
> claims people take a lot of time to write a simple program like this:
>
> "Write a program that prints the numbers from 1 to 100. But for
> multiples of three print "Fizz" instead of the number and for the
> multiples of five print "Buzz". For numbers which are multiples of
> both three and five print "FizzBuzz".
>
> for i in range(1,101):
> ? ? if i%3 == 0 and i%5 != 0:
> ? ? ? ? print "Fizz"
> ? ? elif i%5 == 0 and i%3 != 0:
> ? ? ? ? print "Buzz"
> ? ? elif i%5 == 0 and i%3 == 0:
> ? ? ? ? print "FizzBuzz"
> ? ? else:
> ? ? ? ? print i
>
> is there a better way than my solution? is mine ok?

Define better.

>>> f = ['','','Fizz']*100
>>> b = ['','','','','Buzz']*100
>>> for i in xrange(1,100):
	fb = f[i-1]+b[i-1]
	if fb=='':
		print i
	else:
		print fb


From arnodel at googlemail.com  Sun May 11 15:49:53 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 11 May 2008 20:49:53 +0100
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga>
Message-ID: <m21w484o4e.fsf@googlemail.com>

bc90021 <python at bc90021.net> writes:

>> ...and the exact error message was?
>> 
>> Here is a tip: if you want people to help you, then you have to help
>> them to help you.  Personally, I wouldn't respond to anymore of your
>> questions because you seem incapable of posting the information that was
>> requested.
>
> So far, the people who have answered this post have gone on the 
> assumption that I'm stupid.  I'm not.  I took perfectly working code, 
> cut it from one class, and put it in another.  It stopped working in the 
> second class.  I've spent days on this and trust me, given what I've 
> experienced of the Python community so far, if I didn't have to ask, I 
> wouldn't.

I have in no way assumed that you are stupid.  I have tried to help
you formulate your problem better so that people on the list can help
you.  I believe I have done so respectfully, with the aim of
introducing you to the modus operandi of this group.

> (I really must say that so far the help I am getting in the Python 
> community is a big let down.  Whether it's on IRC or here, everyone has 
> an arrogance that I don't find anywhere else in the open source 
> community, and it seriously makes me question the choice of language that 
> I've made.)

Don't judge too quickly.  I think this newsgroup is on the whole
extremely helpful.  I have learnt a lot from it.  But you have to get
used to its ways, and until you are familiar with them, approach it
with humility.

> The error message was at the top of the thread (am I incapable of posting 
> it, or are you incapable of following a thread?), but here it is again:
>
> IOError: [Errno 2] no such file u'tempfileName'

This is different from the error message that you posted in your
original message.

Anyway, what is useful to us is a full traceback, no just an error
message.

-- 
Arnaud


From sunny0815 at gmxpro.de  Wed May 28 13:09:01 2008
From: sunny0815 at gmxpro.de (Matthias Sommer)
Date: Wed, 28 May 2008 19:09:01 +0200
Subject: Problem using Idle under Linux - mouse not working well
Message-ID: <6a5hteF36fnfeU1@mid.individual.net>

I have a strange problem using the python-Idle: I'm used to be able to 
position the cursor by clicking on the desired position. When I run Idle 
under Mandriva (or under Arch Linux as well) this does not work.

Running under windows it works, running under Xandros linux on my eee pc 
  it works too, so it's not linux specific.

I already asked on the (german) python ng. There have been reports that 
it works too on Suse and Ubuntu. But as of yet no hint where to look to 
make it working under Arch oder Mandriva.

Strange enough, i can position the Cursor by Ctrl-clicking.

I tried with a tiny Tk program with a single text field - there the 
positioning does work too.

So it seems to be a bug in the distro(s) and regarding only Idle not 
Tkinter in total. Where could I look?

Thanks in advance

Matthias


From __peter__ at web.de  Fri May 23 04:07:08 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 May 2008 10:07:08 +0200
Subject: error using all()/numpy [TypeError: cannot perform reduce with
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <g15tva$t0f$03$1@news.t-online.com>

Marc Oldenhof wrote:

> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
> 
> [start Python]
> 
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>> a=['1','2','3']
>>>> all(a)
> True
>>>> from numpy import *
>>>> all(a)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
>     return _wrapit(a, 'all', axis, out)
>   File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
>     result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
> 
> [end of example]
> 
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
> 
> Is there another way around this error?

That's not an error; star-import is a rebinding operation, just like
assignments and the def statement. 

>>> from numpy import *
>>> del all, sum, any
>>> all("123")
True

Peter


From gagsl-py2 at yahoo.com.ar  Sun May 25 01:08:35 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 02:08:35 -0300
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ ?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
Message-ID: <op.ubo1wlhix6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 24 May 2008 00:30:10 -0300, <notnorwegian at yahoo.se> escribi?:

> when running a very computationalheavy program in the shell it
> sometimes freezes but the commandprompt runs it without problems and
> muh faster, why?

My Palantir isn't working very well lately, so it's hard to tell what's wrong if you don't show us the code...

> also, the command prompt starts at C:\Users\user>
>
> i want to start at C:\python25\progs
>
> how do i change that?

I don't see how is this related to Python, but anyway: right-click on the icon/shortcut you use to open it, select Properties, and change its "Start in" directory.

-- 
Gabriel Genellina



From george.sakkis at gmail.com  Fri May  2 15:57:44 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 12:57:44 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
Message-ID: <cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com>

On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
> On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > Shawn Milochik wrote:
> > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > can this be done in Gmail?
>
> > Set up a filter that looks for some phrase in the mail headers that
> > identifies messages originating from google groups.  Gmail's filters are
> > fairly flexible.  I'd probably just have it look for certain words.
> > Look at an e-mail's source (raw view) and particularly check in the
> > headers for things to filter by.
>
> Why don't you just block all messages from Gmail?

Look up the term "false positive" before you make such brilliant
suggestions in the future.

Posting-from-google-groups-ly yrs,

George




From deets at nospam.web.de  Thu May 15 06:37:04 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 15 May 2008 12:37:04 +0200
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
Message-ID: <692i3kF2vrfbfU1@mid.uni-berlin.de>

Gabriel wrote:

> Hi all
> 
> Just wondering if someone could clarify this behaviour for me, please?
> 
>>>> tasks = [[]]*6
>>>> tasks
> [[], [], [], [], [], []]
>>>> tasks[0].append(1)
>>>> tasks
> [[1], [1], [1], [1], [1], [1]]
> 
> Well what I was expecting to end up with was something like:
> ?>>> tasks
> [[1], [], [], [], [], []]
> 
> 
> I got this example from page 38 of Beginning Python.

The "problem" is that all the lists inside the outer list are the same
list - you can check that with 

id(tasks[0]) == id(tasks[1])

So instead of creating a list of list by the *-operator that only multiplies
the references (which is fine immutable objects like strings or numbers),
you need to explicitly create new lists, e.g. with a list-comprehension:

tasks = [[] for _ in xrange(6)]

Try this and everything will work as expected.

Diez


From castironpi at gmail.com  Sat May 17 04:52:53 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 01:52:53 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com> 
	<PWmXj.46797$3v1.36691@bignews3.bellsouth.net>
Message-ID: <72d09350-ba1b-4af4-8fc5-190b6888bbb6@y21g2000hsf.googlegroups.com>

On May 16, 4:23?pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> globalrev wrote:
> > pickle.dumps(mg)
> > pickle.load(mg)
>
> > 'dict' object has no attribute 'readline'
> > dumps load(well i dont know but i get no complaint but running load
> > generates that error)
>
> The 'loads' and 'dumps' methods use strings:
>
> ?>>> import pickle
> ?>>> d = {"this": 42, "that": 101, "other": 17}
> ?>>> s = pickle.dumps(d)
> ?>>> s
> "(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
> ?>>> pickle.loads(s)
> {'this': 42, 'other': 17, 'that': 101}
>
> If you want to store to / restore from file, use 'dump' and 'load':
>
> # write to file 'out'...
> ?>>> f = open("out")
> ?>>> f = open("out", "wb")
> ?>>> pickle.dump(d, f)
> ?>>> f.close()
>
> # restore it later
> ?>>> g = open("out", "rb")
> ?>>> e = pickle.load(g)
> ?>>> g.close()
> ?>>> e
> {'this': 42, 'other': 17, 'that': 101}
>
> Also seehttp://docs.python.org/lib/pickle-example.html.
>
> Hope this helps!
>
> --Hans

I want to compare that cleanliness with other languages to compare
formats.

Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
pickle.load( 'out', 'rb' )?


From gagsl-py2 at yahoo.com.ar  Mon May  5 02:36:38 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 03:36:38 -0300
Subject: Script using generators produces different results when invoked
	as a CGI
References: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>
Message-ID: <op.uan4ncx9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:31:45 -0300, Barclay, Ken <Ken.Barclay at schwab.com> escribi?:

> I attended David Beazley's awe-inspiring tutorial on the use of
> generators in systems programming:
>http://www.dabeaz.com/generators/
> <BLOCKED::http://www.dabeaz.com/generators/>
>I used his approach to write a web tool that can display search results
> from different log files. But the resulting script produced fewer
> results when invoked as CGI than it did when run from the command line,
> and I can't figure out why.

> Problem: For small sets of files this works great. But when I had 19Meg
> worth of log files in a test directory, the script would return the
> correct number of matching lines (288) only when it was invoked directly
> from the command line. When invoked from a CGI script, it returns 220
> lines instead (written to the "tempfile", below.) I don't know where
> that limit is coming from. If more logs are added to the test directory,
> the result is always the same 220 lines.
>I'm using Python 2.5.1 on Red Hat Linux 3.2.3-47. Below is the whole
> script I was testing with. It's using hard-coded values in place of ones
> I'll be getting from an HTML form (generated with HTMLgen) presented to
> the user.
>There are no exceptions or errors of any kind. Any pointers on what
> might be happening here would be welcome!

No entry in the error log, on the web server? (Apache?)
Perhaps you're hitting some internal limit of the cgi process, either memory or cpu time per request or temp file size...
Are you sure the script runs to completion? Output a message at the end, to be sure.

-- 
Gabriel Genellina



From bruno.desthuilliers at gmail.com  Fri May 23 16:30:14 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 23 May 2008 13:30:14 -0700 (PDT)
Subject: Reloading function obtained via 'from xxx import yyy'
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <05a04c1f-a02a-45dc-863a-755aca53375a@c65g2000hsa.googlegroups.com>

On 23 mai, 21:40, "Joel Koltner" <zapwireDASHgro... at yahoo.com> wrote:
> How do I get Python to correctly re-load this function definition?
>
> In test.py:
>
> def testFunc():
>     print 'My testFunc!'
>
> I execute...
>
> >>> from test import testFunc
> >>> testFunc()
>
> My testFunc!
>
> Fine... now I change test.py to:
>
> def testFunc():
>     print 'Modified testFunc!'
>
> ...and I'd like to reload testFunc.  How do I do so?  'from test import
> testFunc' keeps the old definition around, and 'reload test' of course doesn't
> work becayse I didn't use 'import test' in the first place.

Import the module and use the fully qualied name. Or use Emacs with
python-mode.


From deets at nospam.web.de  Wed May 28 06:53:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 12:53:00 +0200
Subject: Flash Decoder
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
Message-ID: <6a4rtbF35ut5sU1@mid.uni-berlin.de>

Ankit wrote:

> Hi everyone,i wanted to build a flash decoder using python can
> somebody tell me which library to use and what steps should i follow
> to make a flash(video) decoder?By a decoder i mean that i need to
> display all the pixel values of each frame.Waiting for your replies.

Check out libffmpeg. It should be accessible using python by various means,
including gstreamer or ctypes.

This is however a rather advanced topic.

Diez


From jr9445 at ATT.COM  Fri May 23 13:26:31 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Fri, 23 May 2008 12:26:31 -0500
Subject: webspider, regexp not working, why?
In-Reply-To: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
References: <8c900277-4e80-441c-bbc5-6db7eec4c9ad@f36g2000hsa.googlegroups.com>
Message-ID: <A20311AF91C11640ACBB721DC2558B490905649D@brexc51p>



> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of
> notnorwegian at yahoo.se
> Sent: Friday, May 23, 2008 12:43 PM
> To: python-list at python.org
> Subject: webspider, regexp not working, why?
> 
> url = re.compile(r"^((ht|f)tp(s?)\:\/\/|~/|/)?([\w]+:\w+@)?([a-zA-Z]
> 
> search and match yields the same results.
> 
> but when you put something like href= in front of it it doesnt work.


a)  '^' matches at the beginning of a line.  So if 'href=' is at the
beginning of the line...

b)  Regexes are hard enough to read as is.  (http|ftp|https) is more
readable than ((ht|f)tp(s?).

c)  If you're going to parse html/xml then bite the bullet and learn one
of the libraries specifically designed to parse html/xml.  Many other
regex gurus have learned this lesson.  Myself included.  =)



*****

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers. GA621




From cjw at ncf.ca  Tue May 20 20:52:59 2008
From: cjw at ncf.ca (Colin J. Williams)
Date: Tue, 20 May 2008 20:52:59 -0400
Subject: Misuse of list comprehensions?
In-Reply-To: <48337015.80202@ncf.ca>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<48337015.80202@ncf.ca>
Message-ID: <g0vrpl$7fg$1@theodyn.ncf.ca>

Colin J. Williams wrote:
> John Salerno wrote:
>> I posted this code last night in response to another thread, and after 
>> I posted it I got to wondering if I had misused the list 
>> comprehension. Here's the two examples:
>>
>> Example 1:
>> --------------------
>> def compress(s):
>>     new = []
>>
>>     for c in s:
>>         if c not in new:
>>             new.append(c)
>>     return ''.join(new)
>> ----------------------
>>
>> Example 2:
>> ------------------------
>> def compress(s):
>>     new = []
>>     [new.append(c) for c in s if c not in new]
>>     return ''.join(new)
>> --------------------------
>>
>> In example 1, the intention to make an in-place change is explicit, 
>> and it's being used as everyone expects it to be used. In example 2, 
>> however, I began to think this might be an abuse of list 
>> comprehensions, because I'm not assigning the result to anything (nor 
>> am I even using the result in any way).
>>
>> What does everyone think about this? Should list comprehensions be 
>> used this way, or should they only be used to actually create a new 
>> list that will then be assigned to a variable/returned/etc.?
>>
> 
> Alternative ways of of looking at the problem are:
> 
> # compress.py
> import sets
> 
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)
> 
> def compress1(s):
>   new= []
>   d= dict(zip(s, len(s)*[[]]))
>   return d.keys()
> 
> def compress2(st):
>   s= sets.Set(st)
>   return s
> 
> if __name__ == "__main__":
>   s= 'In example 1, the intention to make an in-place change is 
> explicit, and it is'
>   print (compress(s))
>   print (compress1(s))
>   print (compress2(s))
> 
> Results:
> 
> In exampl1,thiok-cgsd
> ['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 'k', '-', 'm', 'l', 'o', 'n', 
> '1', 'p', 's', 't', 'x', ',', 'd']
> Set(['a', ' ', 'c', 'e', 'i', 'g', 'I', 'h', 'k', '-', 'm', 'l', 'o', 
> 'n', '1', 'p', 's', 't', 'x', ',', 'd'])
> 
> Colin W.

I should have read all the responses 
before responding!

Paul McGuire had already suggested a set 
approach

Colin W.


From mnikhil at gmail.com  Wed May 14 11:07:00 2008
From: mnikhil at gmail.com (Nikhil)
Date: Wed, 14 May 2008 20:37:00 +0530
Subject: list.__len__() or len(list)
References: <g0d9sj$m58$1@registered.motzarella.org>	<3fc761710805131718y448ef0b8r67dcc8cf118bc80a@mail.gmail.com>
	<mailman.1094.1210727711.12834.python-list@python.org>
Message-ID: <g0ev6o$utb$1@registered.motzarella.org>

Christian Heimes wrote:
> Ian Kelly schrieb:
>> The purpose of obj.__len__() is to implement len(obj), which simply
>> calls it.  So obj.__len__() may be faster, but only marginally.  The
>> reason to prefer len(obj) is that if you inadvertently pass an object
>> that does not implement __len__, you get the more appropriate
>> TypeError rather than an AttributeError.
> 
> len(obj) is faster than obj.__len__() for several types like str. In
> general len() is as least as fast __len__(). len() also does some extra
> sanity checks.
> 
> python2.5 -m timeit "'abc'.__len__()"
> 1000000 loops, best of 3: 0.453 usec per loop
> 
> python2.5 -m timeit "len('abc')"
> 1000000 loops, best of 3: 0.292 usec per loop
> 
> Common code paths are already highly optimized. Don't try to be clever
> unless you really understand what happens inside the interpreter. The
> __internal__ methods are called magic methods for a reason. ;)
> 
> Christian
> 
Thanks for the useful insight.
Then why to have __len__() internal method at all when the built-in 
len() is faster?
I heard, in Python3, this internal method is being pruned/renamed to 
something else? Can someone please shed light here?

Thanks. Nikhil


From gagsl-py2 at yahoo.com.ar  Mon May 19 05:56:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 06:56:20 -0300
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
Message-ID: <op.ubea76fsx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 18 May 2008 17:31:44 -0300, Diez B. Roggisch <deets at nospam.web.de> escribi?:
> Agustin Villena schrieb:

>> is there anyway to show the class of a method in an exception's
>> traceback?
>>
>> I want to improve the line
>> File "G:\dev\exceptions\sample.py", line 3, in foo
>>
>> to
>> File "G:\dev\exceptions\sample.py", line 3, in Some.foo
>>
>> Is this improvement feasible
>
> It should be. You can get a dictionary of the locals of an exception
> stack frame, of which you could extract the self-parameter's class.

That by itself is not enough, the method could be inherited; one should walk the base classes in the MRO to find the right one. And deal with classmethods and staticmethods. And decorators that don't preserve meta information... Hmmm, I think it isn't so trivial as it seems.

-- 
Gabriel Genellina



From alan.wright at volubill.com  Mon May 19 15:25:57 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Mon, 19 May 2008 20:25:57 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
Message-ID: <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>

Thanks for the feedback.

Using the socket in a list is great

However, as i imagined, I now get a limit of around 1500 conns before the 
system crashes out, also i have noticed, that the ports loop back to 1025 
when they hit 5000.

Any ideas on how to make the list/socket get to around 50K

TIA

Alan
<s0suk3 at gmail.com> wrote in message 
news:e8e610ae-dec8-4551-b769-28ce9254c2b1 at c58g2000hsc.googlegroups.com...
> On May 19, 10:25 am, "Alan Wright" <alan.wri... at volubill.com> wrote:
>> Hi Folks,
>> I am newbie to Python, but have successfully created a simple client and
>> server setup, I have one issue though.
>>
>> I am trying to test a box by sending many TCP conns (WHILE loop) but not
>> closing them with a FIN/RST. However, no matter what i do, i cannot get 
>> the
>> loop to stop sending FIN from the client.
>>
>> Any clues?
>>
>> Here is my current script
>>
>> #!/usr/bin/python
>>
>> import socket,sys
>> from numpy import *
>> num1=0
>>
>> while (num1<=10) :
>>
>>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>  s.settimeout(10.0)
>>  s.connect(("10.1.1.69", 50008)) # SMTP
>>  print s.recv(1024) + '\n',
>>  num1=num1+1
>>  #s.close()
>>
>> sys.exit(1)
>
> socket.socket instances do an implicit close() on the socket when the
> object is destructed (in this case, it's destructed when it is garbage-
> collected). What's happening is that on each iteration, the variable
> "s", which references the socket.socket instance, is assigned to a new
> socket.socket instance, therefore the instance of the previous
> iteration is no longer referenced by "s", and since it's no longer
> referenced by anything, the instance is garbage-collected,
> automatically imposing an implicit close() on that instance. A simple
> solution could be to create a list and append the socket.socket
> instance of each iteration to that list, that way the instances would
> remain referenced in the list and not be garbage-collected; though you
> might be able to find a more elegant solution.
>
> Sebastian 




From gandalf at shopzeus.com  Wed May 21 15:15:52 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 21 May 2008 21:15:52 +0200
Subject: problem with import / namespace
In-Reply-To: <b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>	
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
Message-ID: <483474E8.8090708@shopzeus.com>

ohad frand wrote
> Hi
> Thanks for the answer.
> I probably didnt write the problem accurately but it is not as you 
> described.
> (i already read before the section that you pointed and it didnt help me)
> the problem is that i dont want to import a file from different 
> directory but only from the same directory.
> \\1\tmp2.py imports \\1\tmp1.py
> \\2\tmp2.py imports \\2\tmp2.py
> but when i execute the following script in the interpreter i get that 
> the second tmp2.py file imports not the file from the same directory 
> but the file that was already imported by the first executed tmp2.py file.
I think that using absolute names DOES solve the problem.

import two.tmp2  # This will import tmp2.py in "two" folder for sure!

> >>> execfile("tmp2.py") <- here the executaion is OK
> >>> os.chdir("c:\\2")
> >>> execfile("tmp2.py") <- here the execution is not ok because 
> tmp2.py file imports the tmp1.py file from c:\\1 which is not OK
Hmm looks like your tmp2.py file is not a module but a whole program. No 
wonder I could not understand you - I thought that "tmp2.py" is a 
module, not a program.

The answer in this case: if tmp2.py is a program then you should either 
manipulate sys.path or chdir to the containing dir, as I told in my 
former post. ( os.split(os.abspath(__file...))) -> then chdir or 
sys.path.insert(0,mydir) )

> in between those two execfile commands i tried to do a lot of things 
> but every time python imported the incorrect file for the second 
> execution. (i am not building a package and those names are just 
> examples for the problem, i am not really using 1 and 2 names as dirs)
Why do you need execfile?

  Laszlo



From python-url at phaseit.net  Mon May  5 20:11:23 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Tue, 6 May 2008 00:11:23 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May  6)
Message-ID: <fvo7nb$5cq$1@lairds.us>

QOTW:  "[buildout] is not just some stupid thing." - Alan Runyan    
    http://wiki.python.org/moin/buildout has more background
    
    
    sum() doesn't use the best possible algorithm when dealing with floating
    point numbers:
        http://mail.python.org/pipermail/python-list/2008-May/489396.html
    
    Is count += 1 a thread-safe operation?
        http://mail.python.org/pipermail/python-list/2008-May/489103.html
    
    Python may read a file faster than C code (!):
        http://mail.python.org/pipermail/python-list/2008-April/488342.html
    
    When to use #!/usr/bin/python and other variants of the shebang line:
        http://mail.python.org/pipermail/python-list/2008-May/489190.html
    
    Find and execute a function given its name:
        http://mail.python.org/pipermail/python-list/2008-April/488648.html
        http://mail.python.org/pipermail/python-list/2008-April/485451.html
    
    How to store program configuration options in a human-readable format:
        http://mail.python.org/pipermail/python-list/2008-May/489094.html
    
    A simple question triggers a long thread: why ord/chr aren't methods
    of the str class? why str.join and not list.join?
        http://mail.python.org/pipermail/python-list/2008-April/488908.html
    
    How to "unread" a line when iterating over a file:
        http://mail.python.org/pipermail/python-list/2008-April/488661.html
    
    Problems with unicode objects in exception messages:
        http://mail.python.org/pipermail/python-list/2008-April/488672.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From gherron at islandtraining.com  Sun May  4 12:03:32 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 09:03:32 -0700
Subject: is +=1 thread safe
In-Reply-To: <yfsod7mfcl0.fsf@gmail.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
Message-ID: <481DDE54.102@islandtraining.com>

Alexander Schmolck wrote:
> Gary Herron <gherron at islandtraining.com> writes:
>
>   
>> But... It's not!  
>>
>> A simple test shows that.   I've attached a tiny test program that shows this
>> extremely clearly.  Please run it and watch it fail.
>>     
>
> In [7]: run ~/tmp/t.py
> final count: 2000000
>   should be: 2000000
>
> (I took the liberty to correct your test to actually do what I said, namely
> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> numpy.array(0)``).
>   

The test was meant to simulate the OP's problem, but even with your 
suggestion of using numpy, it *still* fails!  Just start increasing the 
number of increments by a factor of 2, 4, 10 until it fails:

final count: 1999998
  should be: 2000000

final count: 5999997
  should be: 6000000

final count: 5995068
  should be: 6000000

(Surprisingly, using numpy makes this test *much* slower, meaning the 
increment executes many more instructions, which implies hitting a 
thread context switch at exactly the critical point is much less 
common.   But it can happen if you run the test long enough.)

I am running this on a Core2 Duo CPU, but the GIL should prevent that 
from affecting the result of the run.

I've reattached the file with the numpy change (and a larger loop 
counter) for others to try.

Gary Herron

>
> 'as
>
> p.s. please don't send me copies to on-list replies, at least not without
> explicitly mentioning the fact -- I've got better things to do then guessing
> whether something was meant to be off-list or not.
>   
My apologies.
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

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From wizzardx at gmail.com  Mon May  5 13:47:19 2008
From: wizzardx at gmail.com (David)
Date: Mon, 5 May 2008 19:47:19 +0200
Subject: unicode newbie - printing mixed languages to the terminal
In-Reply-To: <30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>
References: <mailman.558.1209935553.12834.python-list@python.org>
	<30qTj.8447$iK6.4206@nlpi069.nbdc.sbc.com>
Message-ID: <18c1e6480805051047x5efec67dxedcc3930fc9b609c@mail.gmail.com>

>  I suggest you read http://www.amk.ca/python/howto/unicode to demystify what
> Unicode is and does, and how to use it in Python.

That document really helped.

This page helped me to setup the console:http://www.jw-stumpel.nl/stestu.html#T3

I ran:

dpkg-reconfigure locales # And enabled a en_ZA.utf8
update-locale LANG=en_ZA.utf8

(And then rebooted, but I don't know if that was necessary).

I can now print mixed language unicode to the console from Python.

Thanks for your help.

David.


From szhorvat at gmail.com  Mon May  5 04:26:11 2008
From: szhorvat at gmail.com (Szabolcs)
Date: Mon, 5 May 2008 01:26:11 -0700 (PDT)
Subject: Feature suggestion: sum() ought to use a compensated summation 
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
	<Xns9A94ACAB89668duncanbooth@127.0.0.1> 
	<mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
Message-ID: <2aa02543-c04a-49cf-acc0-815913136172@26g2000hsk.googlegroups.com>

On May 5, 9:37 am, Szabolcs Horv?t <szhor... at gmail.com> wrote:
> Gabriel Genellina wrote:
>
> > Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement.
>
> It does not _require_ this, but using an __add__ that is not commutative
> and associative, or has side effects, would qualify as a serious misuse,
> anyway.

Sorry, I meant associative only, not commutative.


From bignose+hates-spam at benfinney.id.au  Tue May  6 20:37:23 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 07 May 2008 10:37:23 +1000
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <87y76nc5ks.fsf@benfinney.id.au>

vivainio at gmail.com (Ville M. Vainio) writes:

> So I'm not opposed to GPL - just saying that it's not often the
> choice that will net you the most users.

Fortunately, that's not always the goal of a free software project.
When freedom of all users matters more than "popular at any cost", the
GPL is a better choice.

-- 
 \       "One of the most important things you learn from the internet |
  `\   is that there is no 'them' out there. It's just an awful lot of |
_o__)                                            'us'." ?Douglas Adams |
Ben Finney


From ivan.illarionov at gmail.com  Sat May 24 09:12:10 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 24 May 2008 13:12:10 +0000 (UTC)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <g1947a$v28$1@news.mtu.ru>

On Fri, 23 May 2008 22:56:57 -0700, cm_gui wrote:

> i am not comparing Python with C or C++ which are of course compiled
> languages.
> 
> if there is any consolation to Python lovers here, Python is still
> faster than Microsoft ASP/ASPX.
> 
> i'm not trying to 'troll' here.   it's not just me. many have complained
> that python is slow.   python websites are slow.
> 
> if python is such a good programming/scripting language, why can't they
> build a faster interpreter/compiler engine? and beat php and zend.
> to the python team, rebuild your interpreter!
> 
> 
> torontolife.com is slow.
> 
> okay, maybe Python is only slightly slower than PHP, but it APPEARS to
> be much slower.
> there is a distinct waiting time whenever you access a python web page
> before the page starts loading.  but once it loads, it is fast. php page
> starts loading immediately once you access it, but you can see the page
> slowly loading. because you see the page starts loading immediately, you
> feel it is fast.


It's only your feelings based on prejudice.

Please look at the real benchmarks:

http://www.alrond.com/en/2007/jan/25/performance-test-of-6-leading-
frameworks/

PHP is the slowest.
Python/Django is the fastest. 2x-35x times faster then PHP.

Give us the real benchmarks or stop trolling.

Ivan


From stephane.larouche at polymtl.ca  Fri May  9 20:55:47 2008
From: stephane.larouche at polymtl.ca (=?utf-8?b?U3TDqXBoYW5l?= Larouche)
Date: Sat, 10 May 2008 00:55:47 +0000 (UTC)
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org>
	<26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
Message-ID: <loom.20080510T004435-107@post.gmane.org>


> On 9 Mai, 01:50, Barry Warsaw <ba... at python.org> wrote:
> > On behalf of the Python development team and the Python community, I
> > am happy to announce the third alpha release of Python 2.6, and the
> > fifth alpha release of Python 3.0.

After I installer Python 2.6a3, Matlab R2007a began having problems. When I
start Matlab, it shows a window indicating that it is installing Microsoft
Visual C++ 2005 Redistributable, which fails, and then Matlab closes. This
problem did not happen with Python 2.6a2 and removing Python 2.6a3 solves the
problem.

Is anybody else having the same problem? Do you know what causes it? Is there a
workaround?



From tjreedy at udel.edu  Tue May 20 13:57:57 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 May 2008 13:57:57 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com><69g2bpF31ttuuU1@mid.uni-berlin.de>
	<027e4d96$0$25054$c3e8da3@news.astraweb.com>
Message-ID: <g0v3f3$ivq$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:027e4d96$0$25054$c3e8da3 at news.astraweb.com...
| "Diez B. Roggisch" <deets at nospam.web.de> wrote in message
| news:69g2bpF31ttuuU1 at mid.uni-berlin.de...
| > the above code is pretty much of a no-no because it has quadratic 
runtime
| > behavior.
|
|
| What's that mean, exactly? Are you referring to both examples, or just 
the
| second one?

Both.  Searching new takes longer each time.  More exactly, the number of 
comparisons should be about len(s)*len(new_final)/2, depending on how 
duplicates are distributed in s. 





From foul_ole_ron1 at yahoo.com  Fri May 23 03:20:50 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 00:20:50 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <04510c4f-aa15-4c5a-860c-eca762a99546@t54g2000hsg.googlegroups.com>

On 23 mei, 09:12, Marc Oldenhof <foul_ole_r... at yahoo.com> wrote:
> Hello all,
>
> I'm pretty new to Python, but use it a lot lately. I'm getting a crazy
> error trying to do operations on a string list after importing numpy.
> Minimal example:
>
> [start Python]
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> a=['1','2','3']
> >>> all(a)
> True
> >>> from numpy import *
> >>> all(a)
>
> Traceback (most recent call last):
> ? File "<stdin>", line 1, in <module>
> ? File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 982, in all
> ? ? return _wrapit(a, 'all', axis, out)
> ? File "C:\Python25\lib\site-packages\numpy\core\fromnumeric.py", line
> 37, in _wrapit
> ? ? result = getattr(asarray(obj),method)(*args, **kwds)
> TypeError: cannot perform reduce with flexible type
>
> [end of example]
>
> It seems that Python calls numpy's "all" instead of the standard one,
> is that right? If so, how can I call the standard "all" after the
> numpy import? ["import numpy" is not a desirable option, I use a lot
> of math in my progs]
>
> Is there another way around this error?
>
> Marc

Never mind, I found a way. For reference:

>>> import __builtin__
>>> __builtin__.all(a)
True

Works!

Marc


From gagsl-py2 at yahoo.com.ar  Sun May 25 22:25:33 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 May 2008 23:25:33 -0300
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>
	<a35689d7-d186-4f6d-83fa-2fda47d1a39e@m44g2000hsc.googlegroups.com>
Message-ID: <op.ubqo0vo3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 25 May 2008 22:42:06 -0300, <notnorwegian at yahoo.se> escribi?:

> def joinSets(set1, set2):
>     for i in set2:
>         set1.add(i)
>     return set1

Use the | operator, or |=

> Traceback (most recent call last):
>   File "C:/Python25/Progs/WebCrawler/spider2.py", line 47, in <module>
>     x = scrapeSites("http://www.yahoo.com")
>   File "C:/Python25/Progs/WebCrawler/spider2.py", line 31, in
> scrapeSites
>     site = iterator.next()
> RuntimeError: Set changed size during iteration

You will need two sets: the one you're iterating over, and another collecting new urls. Once you finish iterating the first, continue with the new ones; stop when it's empty.

> def scrapeSites(startAddress):
>     site = startAddress
>     sites = set()
>     iterator = iter(sites)
>     pos = 0
>     while pos < 10:#len(sites):
>         newsites = scrapeSite(site)
>         joinSets(sites, newsites)
>         pos += 1
>         site = iterator.next()
>     return sites

Try this (untested):

def scrapeSites(startAddress):
     allsites = set() # all links found so far
     pending = set([startAddress]) # pending sites to examine
     while pending:
       newsites = set() # new links
       for site in pending:
         newsites |= scrapeSite(site)
       pending = newsites - allsites
       allsites |= newsites
     return allsites

> wtf? im not multithreading or anything so how can the size change here?

You modified the set you were iterating over. Another example of the same problem:

d = {'a': 1, 'b': 2, 'c':3}
for key in d:
   d[key+key]=0

-- 
Gabriel Genellina



From antroy at gmail.com  Fri May 16 11:45:16 2008
From: antroy at gmail.com (Ant)
Date: Fri, 16 May 2008 16:45:16 +0100
Subject: Pyparsing Question
In-Reply-To: <ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>
Message-ID: <YOSdndykxtsMLbDVnZ2dnUVZ8s_inZ2d@posted.plusnet>

Hi Paul,

> LineStart *really* wants to be parsed at the beginning of a line.
> Your textline reads up to but not including the LineEnd.  Try making
> these changes.
> 
> 1. Change textline to:
> 
>      textline = pp.Combine(
>         pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
> \
>         pp.LineEnd().suppress()

Ah - so restOfLine excludes the actual line ending does it?

> 2. Change comb to:
> 
>     comb = head + parser

Yes - I'd got this originally. I added the garbage to try to fix the 
problem and forgot to take it back out! Thanks for the advice - it works 
  fine now, and will provide a base for extending the list format.

Thanks,

Ant...


From miller.paul.w at gmail.com  Mon May 26 15:28:22 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Mon, 26 May 2008 12:28:22 -0700 (PDT)
Subject: definition of a highlevel language?
References: <2759eed3-956d-45c7-8dfb-9557f74133b3@56g2000hsm.googlegroups.com>
	<c3f69bf60805261150w7b928d07r253b8aea000fcbc0@mail.gmail.com> 
	<mailman.1623.1211828625.12834.python-list@python.org>
Message-ID: <fb0b96c6-eda1-4922-94f1-3303321501f9@c58g2000hsc.googlegroups.com>

On May 26, 3:03?pm, "Dan Upton" <up... at virginia.edu> wrote:

> Alternately, you can think of a pseudo-continuum from low level to
> high level, sort of as a function from language lines to assembly
> instructions... for instance, I seem to recall reading somewhere that
> made the example of BASIC being higher level than C because one
> statement in BASIC translated to, on average, 5 assembly instructions,
> whereas a C statement translated to, on average, 2.5 assembly
> instructions. ?Of course, maybe that's not the best metric ....

That might be a reasonable place to start.  But, remember the example
I gave for C/Python where

int max = len (seq);
for (int i=0; i < max; ++i) {
   somefunc ( seq[i] );
}

in C was more or less equivalent to

for item in seq:
    somefunc (item)

in Python?  Not only does the C code take up one more line, but it has
a lot of additional cruft with declaring variables, making sure the
iteration doesn't go out of bounds, and all that fiddly stuff you
don't have to worry about in Python.

Perhaps a better measure would be "how many language elements do I
need to express what I want to express."  In this case, I count around
10-11 in the C code, versus 5-6 in the Python code.  Thus, I'd say for
this particular case of iterating a sequence, Python is twice as
expressive as C.  (This is even giving C a little credit, because I
just assumed there was this function "len" that returned the size of
whatever sequence-thing.  In reality, you'd need to put more
boilerplate in to make something like that work.)


From lrahuel.notgood at voila.fr  Wed May 21 05:14:18 2008
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Wed, 21 May 2008 11:14:18 +0200
Subject: Python in non-standard location erring with "No module named
	_sha256"
References: <0eecaca1-b32d-42e8-ade6-3001004e3e19@34g2000hsf.googlegroups.com>
Message-ID: <4833e7eb$0$887$ba4acef3@news.orange.fr>

Maybe you run the configure, make, make install without addind devel
packages on your system. I mean:

openssl-devel
readline-devel
...

Regards,

emallove wrote:

> I'm running into the below "No modules named _sha256" issue, with a
> python installed in a non-standard location.
> 
> $ python
> Python 2.5.2 (r252:60911, May 20 2008, 09:46:50)
> [GCC 3.3.3 (SuSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import md5
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/ws/ompi-tools/lib/python2.5/md5.py", line 6, in <module>
>     from hashlib import md5
>   File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 135, in
> <module>
>     sha224 = __get_builtin_constructor('sha224')
>   File "/ws/ompi-tools/lib/python2.5/hashlib.py", line 63, in
> __get_builtin_constructor
>     import _sha256
> ImportError: No module named _sha256
> 
> Googling around, this seems to be related to OpenSSL being in a non-
> standard location? I've edited the Setup file to set $(SSL) to the non-
> standard location. Now Python compiles fine, but I still get the above
> error.
> 
> Any help would be much appreciated.
> 
> Thanks,
> Ethan



From tjreedy at udel.edu  Sat May 10 14:43:39 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 May 2008 14:43:39 -0400
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com><op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar><g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
Message-ID: <g04qcq$gd8$1@ger.gmane.org>


"Banibrata Dutta" <banibrata.dutta at gmail.com> wrote in message 
news:3de8e1f70805092138y4ca414ck2be6b5246afa664b at mail.gmail.com...
| given that I already have Python2.5 installed & will install Python2.4, 
will
| copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
| i think the answer is "no", but still asking. is it package specific ?

If a particular distribution consists of only Python code (no C dll's) and 
that code uses no 2.5 features and does not depend on any other 2.5 
changes, then it should work with 2.4.  Otherwise.... 





From nagle at animats.com  Fri May  9 03:12:09 2008
From: nagle at animats.com (John Nagle)
Date: Fri, 09 May 2008 00:12:09 -0700
Subject: threading - race condition?
In-Reply-To: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
Message-ID: <4823f61e$0$34533$742ec2ed@news.sonic.net>

skunkwerk wrote:
> i'm getting the wrong output for the 'title' attributes for this
> data.  the queue holds a data structure (item name, position, and list
> to store results in).  each thread takes in an item name and queries a
> database for various attributes.  from the debug statements the item
> names are being retrieved correctly, but the attributes returned are
> those of other items in the queue - not its own item.  however, the
> model variable is not a global variable... so i'm not sure what's
> wrong.
> 
> i've declared a bunch of worker threads (100) and a queue into which
> new requests are inserted, like so:
> 
> queue = Queue.Queue(0)
>  WORKERS=100
> for i in range(WORKERS):
> 	thread = SDBThread(queue)
> 	thread.setDaemon(True)
> 	thread.start()
> 
> the thread:
> 
> class SimpleDBThread ( threading.Thread ):
>    def __init__ ( self, queue ):
> 		self.__queue = queue
> 		threading.Thread.__init__ ( self )
>    def run ( self ):
> 		while 1:
> 			item = self.__queue.get()
> 			if item!=None:
> 				model = domain.get_item(item[0])
> 				logger.debug('sdbthread item:'+item[0])
> 				title = model['title']
> 				scraped = model['scraped']
> 				logger.debug("sdbthread title:"+title)
> 
> any suggestions?
> thanks

   Hm.  We don't have enough code here to see what's wrong.
For one thing, we're not seeing how items get put on the queue.  The
trouble might be at the "put" end.

   Make sure that "model", "item", "title", and "scraped" are not globals.
Remember, any assignment to them in a global context makes them a global.

   You should never get "None" from the queue unless you put a "None"
on the queue.  "get()" blocks until there's work to do.

					John Nagle


From anand.prabhakar.patil at gmail.com  Thu May 29 04:46:59 2008
From: anand.prabhakar.patil at gmail.com (Anand Patil)
Date: Thu, 29 May 2008 09:46:59 +0100
Subject: code of a function
In-Reply-To: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
References: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>
Message-ID: <2bc7a5a50805290146v17ab6e8x3ac0aeae796542fb@mail.gmail.com>

On Thu, May 29, 2008 at 9:10 AM, Dark Wind <darkwind.87 at gmail.com> wrote:

> Hi,
>
> Is there any command in Python which gives the code for a function like
> just typing the name of a function (say svd) in R returns its code.
>
> Thank you
>

If you're using IPython, you can type svd?? .
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From straton at lampsacos.demon.co.uk  Mon May 19 13:00:43 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Mon, 19 May 2008 18:00:43 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0s26t$s2c$1@aioe.org>
References: <g0fbdf$jp$1@aioe.org> <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>
	<g0s26t$s2c$1@aioe.org>
Message-ID: <g0sbns$a5i$1$8300dec7@news.demon.co.uk>

I would still be concerned that you are checking against the percentage
of the 768 bins returned by the histogram method. Two pixels of
widely different colour end up in the same bin, so long as just ONE
of the Red, Green, or Blue components is equal.

So, for example, colours (2, 27, 200) and (200, 27, 2) are both in
the bin for G=27. But they are very different colours.

There are actualy 256 * 256 * 256 colours, but I don't suppose
you want that many bins!

What you want is a much smaller number of bins, with pixels
of 'close' colours (whatever that means) put into the same bin.

What 'close' means for colours, is quite a difficult thing, and
the consensus is that using the three RGB coordinates is not
as good as certain other colour spaces.

You could use the ImageOps.posterize method to reduce the number of 
colours in the image, but whether 'close' colours end up together,
I don't know.

You might try the PIL special interest group (SIG) 'image-sig'

http://mail.python.org/mailman/listinfo/image-sig

(If you want to know exactly how many unique colours an image actually
has, load the image into the 'GIMP' assuming you have it,
and go to :

Menubar --> Filters --> Colours --> Colourcube analysis...

)










Poppy wrote:
> Thanks, since posting I  figured out how to interpret the histogram results, 
> which seems to be the consensus in responses. I wrote a check image program 
> and have been periodically calling it against a folder where I make a copy 
> of our images used for production. My method right now is to check what we 
> send for errors, but is not preventive.
> 
> Also I determined whitespace is not the only issue, any color that 
> dominates. I'm considering rewriting this code below to setup bins, so if 
> combined neighboring colors exceeds the threshold then reject the image. I 
> have examples where half the image appears black, but actually varies 
> throughout.
> 
> Since my image is RGB I'm looping through a 768 element list.
> 
> Zach-
> 
> import Image, os
> 
> 
> def check_image(file):
> 
>     try:
>         im = Image.open(file)
>     except:
>         return "Can't open file %s " % file
> 
>     imData = im.histogram()
>     i = 0
>     for ea in imData:
>         if ea > ((im.size[0] * im.size[1]) / 4): ## 25% of image size
>             return "bad image %s - %s element num is %s " % (file, ea, 
> str(i))
>         i = i + 1
> 
>     return "good image %s, image size is %s" % (file, im.size)
> 
> 
> def main(dir):
>     data = ""
>     try:
>         files = os.listdir(dir)
>         for ea in files:
>             data = data + str(check_image(os.path.join(dir,ea))) + "\n"
>     except:
>         return "Can't get files in %s" % dir
>     return data
> 
> print main("\\\\host\\path\\to\\image_folder\\")
> 
> 


From deets at nospam.web.de  Fri May 30 07:09:30 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 13:09:30 +0200
Subject: Saving tif file from tricky webserver
In-Reply-To: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>
References: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>
Message-ID: <6aa5jhF35304eU1@mid.uni-berlin.de>

schweet1 schrieb:
> Greetings,
> 
> I am attempting to automate accessing and saving a file (a TIF) from
> the following URL:
> 
> http://patimg1.uspto.gov/.DImg?Docid=US007376435&PageNum=1&IDKey=E21184B8FAD5
> 
> I have tried some methods using urllib, httplib, and
> web32com.client(InternetExplorer), but haven't been successful.
> Currently I am using (in Python 2.5)
> 
> import webbrowser
> 
> url = [see above]
> 
> webbrowser.open(url, new=0, autoraise=0)
> 
> When this is run a windows popup dialog opens asking me to Open, Save,
> or Cancel.  However, if I query multiple such URLs, I do not want to
> have to respond manually.  Is there a way I can use Python to save the
> TIF?

You need to figure out what really becomes the download url, and use 
that. Use e.g. http live headers for firefox to get that information.

If the server needs the form-submitting stuff to actually grant access 
to the TIFF, you might need to use mechanize to talk to the site as if 
you were a browser.

Diez


From sturlamolden at yahoo.no  Tue May 20 13:01:53 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 10:01:53 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com> 
	<52b543da-90f3-4624-a11c-553159832764@l42g2000hsc.googlegroups.com>
Message-ID: <ca38c260-7d22-4d66-9e60-30a7cd90d389@56g2000hsm.googlegroups.com>

On May 19, 10:42 pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:

> Well... They do - they are called 'C compilers' !-) As Roel Schroven
> mentioned - and he is at least partially right on this point - C has
> been designed to make optimizing C compiler not to hairy to write.

C has proven very difficult to optimize, particularly because pointer
aliasing prevents efficient register allocation.

Fortran was designed with ease of optimization in mind. Not many years
ago, it was not uncommon for Fortran code to run twice as fast as
equivalent C. C compilers have recently closed on on the gap by
becoming extremely good at what they do. But that is not because C is
easy to optimize. On the contrary.

For serious number crunshing, there is nothing that compares to
Fortran, even today. f2py makes it easy to call Fortran subroutines
from Python.







From ivan.illarionov at gmail.com  Sat May  3 19:52:58 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 23:52:58 +0000 (UTC)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
Message-ID: <fvitsq$15ti$3@news.mtu.ru>

On Sat, 03 May 2008 15:25:35 -0700, darkblueB wrote:

> I got the Python Imaging Library from source, built and installed, on
> Ubuntu 7.10, not realizing I could run a self-test first. libjpeg is on
> the machine, but was not detected.. so no JPG encoder. I got the
> dev-libjpg and rebuilt PIL. The self-test now shows JPG support.
> 
> but running setup.py install again seems to succeed, but still no JPG
> :-(
> 
> fix ideas appreciated

Make sure that libjpeg62-dev is installed
'sudo apt-get install libjpeg62-dev'

Try run 'python setup.py build_ext -f' to force setup.py to rebuild 
everything with JPEG. And 'sudo python setup.py install' should install 
PIL with JPEG support.

It should work on Ununtu 7.10 (works for me at least).

However, if you want Tkinter support, you should edit setup.py and change 
TCL_ROOT variable:
TCL_ROOT = '/usr/lib/tcl8.4', '/usr/include/tcl8.4'

And make sure that you have tcl/tk libraries/headers:
sudo apt-get install tcl8.4-dev tk8.4-dev


-- 
Ivan


From sjmachin at lexicon.net  Mon May 19 09:21:06 2008
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 19 May 2008 13:21:06 GMT
Subject: Reading Java byte[] data stream over standard input
In-Reply-To: <02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>
References: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>
	<02cac1ae-6f97-4d63-a9fe-73172df95770@l64g2000hse.googlegroups.com>
Message-ID: <48317ec0$1@news.mel.dft.com.au>

sapsi wrote:
> I should also mention that for some reason there are several binay
> values popping in between for some reason. This behavior (for the
> inputr stream) is not expected
> 
> 
>> Now, the incoming data is binary(though mine is actually merely ascii
>> text) but the output is not what is expected. I expect for e.g
>>
>> all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
>> 118.010.241.12 60370 128.210.5.176
>>
>> However i get a 1 before all and a 4 just after \n and before the 6.
>>
>> My question is : how do i read binary data(Java's byte stream) from
>> stdin?
>> Or is this actually what i'm getting?
>>

Consider changing "print x" to "print repr(x)" ... this would mean that 
you have a better chance of understanding what the extra or unexpected 
popping-in bytes are.


From mattheww at chiark.greenend.org.uk  Tue May 13 15:11:38 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 13 May 2008 20:11:38 +0100 (BST)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1016.1210655127.12834.python-list@python.org>
Message-ID: <Apb*6NNcs@news.chiark.greenend.org.uk>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> I would like to write a similar problem without this non-programming  
> distracting issues (that is, a problem simple enough to be answered in a  
> few minutes, that requires only programming skills to be solved, and  
> leaving out any domain-specific knowledge).

Another reason not to like the FizzBuzz example is that it's quite
closely balanced between two reasonable approaches (whether to just
special-case multiples of 15 and say 'FizzBuzz', or whether to somehow
add the Fizz and the Buzz together in that case). The interviewee might
reasonably guess that this distinction is what's being tested, and get
unnecessarily stressed about it.

-M-



From jstucklex at attglobal.net  Sun May 25 20:53:28 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 25 May 2008 20:53:28 -0400
Subject: php vs python
In-Reply-To: <g1d1a4$1rpd$2@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru>
Message-ID: <9IWdnbyQq5GKl6fVnZ2dnUVZ_oGdnZ2d@comcast.com>

Ivan Illarionov wrote:
> Jerry Stuckle wrote:
> 
>> As I've said before - good programmers can write good code in any
>> language.
> 
> Yes, they can. But it may be harder to do for them in one language and 
> easier in another.
> 
> Ivan

Not for a good programmer it isn't.  I've known a few good programmers 
in my 40+ years of programming.  I've known a lot more poor programmers 
who think they're good.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From jjbutler88 at gmail.com  Sat May 24 08:34:25 2008
From: jjbutler88 at gmail.com (jjbutler88 at gmail.com)
Date: Sat, 24 May 2008 05:34:25 -0700 (PDT)
Subject: HTMLParser error
References: <628d3bbf-0fd9-4075-9749-6c8c81f887fa@z72g2000hsb.googlegroups.com>
	<SLidneFS9PW9fq7VnZ2dnUVZ_vKdnZ2d@earthlink.com>
	<1aecdaeb-76f1-4a57-88d3-2023dd6e00e4@e39g2000hsf.googlegroups.com>
	<06ba6753-712e-4c1c-8d2f-c1fd075ed0cf@u6g2000prc.googlegroups.com> 
	<10f12f0c-d08e-41e1-ab6f-10488ae51010@p25g2000pri.googlegroups.com> 
	<42323d1c-9a10-4030-8870-75ed2d10a31e@b64g2000hsa.googlegroups.com> 
	<e7f7c51f-bc6e-4a7c-b266-69c9d2e0f6b7@g16g2000pri.googlegroups.com> 
	<c708c892-ea38-44dd-85e9-21e785391310@k37g2000hsf.googlegroups.com> 
	<2b40f742-fe45-45eb-824a-ee904ab53360@b9g2000prh.googlegroups.com> 
	<2ee8cbfe-78de-4ee7-a125-59910ab1d83c@t54g2000hsg.googlegroups.com> 
	<369c3d5f-69e0-4609-9638-f75c7af94a4e@t12g2000prg.googlegroups.com>
Message-ID: <d4040570-fe3f-47c5-ac6c-d68e2740feca@z72g2000hsb.googlegroups.com>

On May 22, 8:20?pm, alex23 <wuwe... at gmail.com> wrote:
> On May 23, 5:06 am, jonbutle... at googlemail.com wrote:
>
> > Nope, this is my first experience with object oriented programming,
> > only been learning python for a few weeks but it seemed simple enough
> > to inspire me to be a bit ambitious. If you could hook me up with some
> > good docs that would be great. I was about to but a book on python,
> > specifically OO based, but il look at these docs first. I understand
> > most of the concepts of inheritance, just not ever used them before.
>
> Ah, okay, I'm really sorry, if I'd known I would've tried to explain
> things a little differently :)
>
> Mark Pilgrim's Dive Into Python is a really good place to start:http://www.diveintopython.org/toc/index.html
>
> For a quick overview of object oriented programming in Python, try:http://www.freenetpages.co.uk/hp/alan.gauld/
> Specifically:http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm
>
> But don't hesitate to ask questions here or even contact me privately
> if you'd prefer.


Thanks for the help, sorry for the delayed reply, flew out to detroit
yesterday and the wifi here is rubbish. Will definitely get reading
Dive into Python, and the other article cleared a lot up for me.
Hopefully I wont have these errors any more, if I keep getting them il
get in touch.

Cheers


From ma.saeedi at gmail.com  Thu May  8 12:02:14 2008
From: ma.saeedi at gmail.com (Maryam Saeedi)
Date: Thu, 8 May 2008 11:02:14 -0500
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
Message-ID: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>

I was wondering if you know how can I run a python code once every five
minutes for a period of time either using python or some other program like
a bash script.

I have asked this question before and some of you answered me but I still
have problem. Most of the answers was to use cron and crontab which works on
my computer but not if I want to do it on department's computer since I do
not have permission to change those files. Is there any other way which does
not need administrator permission?

Thanks  a lot,

Maryam
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From afriere at yahoo.co.uk  Mon May 19 22:59:45 2008
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 19 May 2008 19:59:45 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
Message-ID: <8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com>

On May 20, 6:58 am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 19 mai, 22:29, Luis Zarrabeitia <ky... at uh.cu> wrote:
> (snip)
>
> > The main
> > concept here: identity [usually] implies equality,
>
> I really enjoyed the "usually" disclaimer !-)

Well you have to be careful in case some smartarse comes back with a
class with something like this in it:

def __eq__ (self, other) :
    if self is other : return False

%)


From inhahe at gmail.com  Tue May 13 15:41:00 2008
From: inhahe at gmail.com (inhahe)
Date: Tue, 13 May 2008 15:41:00 -0400
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com>
Message-ID: <V7mWj.65254$%15.28939@bignews7.bellsouth.net>


"George Sakkis" <george.sakkis at gmail.com> wrote in message 
news:0563506d-bd36-404d-8961-4c4c5d1cc029 at t54g2000hsg.googlegroups.com...
> On May 13, 9:46 am, Sanoski <Joshuajr... at gmail.com> wrote:
>
>> Any programming that helps you solve a problem is fun and
>> recreational. At least, that's how I look at it. I suppose it really
>> depends on why you're doing it, what your objective is, etc. But I'd
>> say, why not?
>
> You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> you can safely ignore its posts.

How does it generate text?




From vivainio at gmail.com  Mon May  5 14:31:21 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 18:31:21 GMT
Subject: [ANN] Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ff22c206-d0cc-4b21-a6c3-0bb276ae0866@k37g2000hsf.googlegroups.com>
	<mailman.409.1209648691.12834.python-list@python.org>
Message-ID: <prs0zjpl.fsf@gmail.com>

python at bdurham.com writes:

> I didn't find your language offensive but you might consider toning down
> your review of the Awesome Window Manager :)

Nah - keep up the bad attitude. Your (Zed) blog/articles are one of
the few things on the programmosphere that actually make me laugh
audibly.



From nagle at animats.com  Mon May 19 00:40:28 2008
From: nagle at animats.com (John Nagle)
Date: Sun, 18 May 2008 21:40:28 -0700
Subject: New to Python, Discussion Groups.
In-Reply-To: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <48310199$0$34496$742ec2ed@news.sonic.net>

cmoller wrote:
> Hi,
> 
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
> 
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical. I am not in a hurry and would approach the problem as a way
> to learn.
> 
> The data I am processing is readily seen via telnet so I know it's
> there.
> 
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?

    This is certainly feasible, but you might find it faster to just buy
and use National Instruments LabView.

    I've done data logging from sensors over Ethernet, but used
QNX/Photon, which is useful if you want to do hard real-time
control, but overkill otherwise.

    You can certainly interface to sensors with Ethernet interfaces
from Python.  The difficulty of doing this depends on how well designed
the sensor output format is.  Some are awful.  Be aware of the need
for timeouts and the problems of dealing with devices which may be
turned off and on or which may not send when wanted.

					John Nagle


From paddy3118 at googlemail.com  Sun May 11 01:35:25 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 10 May 2008 22:35:25 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org> 
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <e911a80b-8265-4159-808b-7c97e5887d99@x41g2000hsb.googlegroups.com>

On May 10, 9:56 pm, wxPytho... at gmail.com wrote:

> I have two another interesting things to discuss about, for which I'll
> open new posts on this group. Look for "Python doesn't recognize quote
> types" and "Python, are you ill?".

Hi,
You might try making your titles a little more descriptive to help
people filter/search on them.

- Paddy.


From wuwei23 at gmail.com  Tue May  6 07:18:02 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 6 May 2008 04:18:02 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <8db0155f-fde9-4760-b7a0-12ece5023100@j33g2000pri.googlegroups.com>

On May 6, 4:43 am, notbob <not... at nothome.com> wrote:
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
>     print bruce, bruce
> ****ME****
> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

Did you copy the function definition into chap03.py? Because the error
sounds a lot like you're trying to import something from an empty
file.

I think you may have missed the following line that occurs in the
paragraph just before the import example: "To see how this works,
assume the print_twice function is defined in a script
named chap03.py."

If you copy the code provided for 'print_twice' into your 'chap03.py'
file, the example should work.

Hope this helps.

- alex23


From fuzzyman at gmail.com  Sat May 24 13:02:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:02:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
Message-ID: <b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>

On May 24, 4:56?pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> Fuzzyman <fuzzy... at gmail.com> writes:
> > The 'we told you not to use that' approach, when applied to paying
> > customers doesn't really work... all they see is that you broke
> > their spreadsheet code by changing your API.
>
> And the customer point of view is quite reasonable - they have a job
> to do, and a limited timeframe; sometimes accessing privates directly
> is much better than waiting for updates from vendor. Bad designs (as
> far as choosing publics goes) happen.


They will use whatever they find, whether it is the best way to
achieve a goal or not. Once they start using it they will expect us to
maintain it - and us telling them it wasn't intended to be used by
them in the first place won't cut it.


>
> Even if their softare breaks on upgrade, you can quite clearly point
> out that they used an internal api - and they will keep on using the
> old version until they solve the problem. Everybody wins.
>

Not if they are waiting for a fix or new feature in the upgrade - and
we can't refactor because they are relying on APIs that we want to
remove.

We very much lose.


> Perhaps a lint-like validation tool would be optimal for this
> problem...

So we can refuse to execute their code if they use private APIs?

Proxying so that we can really hide our internal APIs is a better
solution.

This hasn't happened to us yet (our application has only been in
commercial use since January), but it is one of the reasons that
Microsoft's COM APIs grew so wide and wild, and caused them very real
problems in trying to improve them. We are keen to avoid the same
situation.

Michael Foord
http://www.ironpythoninaction.com/


From geonomica at gmail.com  Fri May 23 19:48:27 2008
From: geonomica at gmail.com (gianluca)
Date: Fri, 23 May 2008 16:48:27 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
	<f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>
	<slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <ce293364-7aef-4c43-8504-5ae353c49406@e39g2000hsf.googlegroups.com>

On 23 Mag, 12:30, Nick Craig-Wood <n... at craig-wood.com> wrote:
> gianluca <geonom... at gmail.com> wrote:
> >  On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > > > exception like this:
>
> > > > Traceback (most recent call last):
> > > >   File "<pyshell#18>", line 1, in <module>
> > > >     myDLL.myFUNCT()
> > > >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> > > >     func = self.__getitem__(name)
> > > >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> > > >     func = self._FuncPtr((name_or_ordinal, self))
> > > > AttributeError: function 'myFUNCT' not found
>
> > > Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> > > chance you compiled your C as C++ and name mangling kicked in?
>
> > > Can you show a minimal C source for a DLL, how you compiled it, what you
> > > did on the Python side to call it, and how it fails?
>
> > > Ciao,
> > >         Marc 'BlackJack' Rintsch
>
> >  I've located my dll in c:\windows\system32 (in linux I aven't any
> >  problem) and I compiled it with dev-c++. The source code is C standard
> >  ANSII and is quite havy. If you like I can send it via mail (you can
> >  realy at geonom... at gmail.com) . I've tryed to build a wrape with swig
> >  olso with same code and I can access at all the function.
>
> You can use objdump from mingw or cygwin to look inside the dll and
> see exactly what it is exporting, eg
>
> objdump -x OurSharedCodeLibrary.dll
>
> This prints a great deal of stuff!  In the middle you'll see
>
> [snip]
> The Export Tables (interpreted .rdata section contents)
> [snip]
> Ordinal/Name Pointer] Table
>         [   0] OSCL_DEBUG_fakeInitComplete
>         [   1] OSCL_close
>         [   2] OSCL_displayIdent
>         [   3] OSCL_getCurrentDynamicParams
>         [   4] OSCL_getCurrentStaticParams
>         [   5] OSCL_getErrorString
>         [   6] OSCL_getIdent
> [snip]
>
> This is a dll we used in a project, and those names exactly worked
> with ctypes, eg some snips from the ctypes code
>
>         self.dll = cdll.LoadLibrary("OurSharedCodeLibrary")
>         self.dll.OSCL_getErrorString.restype = c_char_p
>
>     def getErrorString(self, status):
>         return self.dll.OSCL_getErrorString(c_int(status))
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Thank you for help!
I've done all you suggest and I've a objdump output like this:
...
[ 86](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003755 _IsCoverRelD
[ 87](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003657 _IsCoverRelA
[ 88](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x000034f5 _IsCoverDX
[ 89](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x0000341b _IsCoverA
[ 90](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00003072 _CoreRelD
[ 91](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00002f5e _CoreRelA
...
my funtions are the __IsCoverRelD, __IsCoverRelA, etc but when I call
it (myLIB.__IsCoverRelA or myLIB.__IsCoverRelA()) I've the same
problem.
Hy
gianluca


From mr.edel at gmx.at  Thu May 29 12:17:13 2008
From: mr.edel at gmx.at (Matt)
Date: Thu, 29 May 2008 16:17:13 +0000
Subject: ctypes, function pointers and a lot of trouble
References: <g1jnfq$6s9$1@aioe.org>
	<slrng3qtbb.nn.nick@irishsea.home.craig-wood.com>
Message-ID: <g1mku3$ghu$1@aioe.org>

Okay, thanks a lot for your reply Nick, I think you pushed me back on 
the right way.

Now I started with trying to implement the callback functions and am 
stuck at the following point:

I define my classes/structures/unions:

------------------------------CODE-----------------------------------------

class cdStream(Structure):
     _fields_ = [("contextH", c_uint),
                      ("open", c_void_p),
                      ("close", c_void_p),
                      ("read", c_void_p),
                      ("write", c_void_p),
                      ("seek", c_void_p),
                      ("tell", c_void_p)]

class memunion(Union):
     _fields_ = [("lpszFileName", c_char_p),
                      ("pStream", cdStream)]


class cdStgMedium(Structure):
     _fields_ = [("Type", c_uint),
                      ("u", memunion)]

------------------------------\CODE----------------------------------------

then i define my functions (right now I do just nothing) and at the same 
time I define the datatypes like they're listed in my C sample program:


------------------------------CODE-----------------------------------------

def pystreamopen (contextH, mode, pErr):
     pass

cstreamopen = CFUNCTYPE(c_uint, c_ushort, c_uint)

def pystreamclose (contextH, pErr):
     pass

cstreamclose = CFUNCTYPE(c_uint, c_uint)

def pystreamread (contextH, pBuf, pBufsize, pErr):
     pass

cstreamread = CFUNCTYPE(c_uint, c_void_p, c_uint, c_uint)

def pystreamtell (contextH, pErr):
     pass

cstreamtell = CFUNCTYPE(c_uint, c_uint)

def pystreamwrite (contextH, origin, offset, pErr):
     print "writing..."
     pass

cstreamwrite = CFUNCTYPE(c_uint, c_void_p, c_uint, c_uint)

------------------------------\CODE----------------------------------------

and now the problem starts: i want the pointers in the cdStream 
Structure point at my functions and tried to do it the following way:


------------------------------CODE-----------------------------------------

data = cdStgMedium()
data.type = 0
data.u.pStream.contextH = c_uint(3) #must be some kind of identifier.
data.u.pStream.open = cstreamopen(pystreamopen)
data.u.pStream.close = cstreamclose(pystreamclose)
data.u.pStream.write = cstreamwrite(pystreamwrite)
data.u.pStream.tell = cstreamtell(pystreamtell)
data.u.pStream.read = cstreamread(pystreamread)

------------------------------\CODE----------------------------------------

unfortunately that doesn't work because Python returns a TypeError: 
incompatible types, CFunctionType instance instead of c_void_p instance

Any ideas/help (please)?

Best regards,
Matt




From inhahe at gmail.com  Thu May 22 13:33:50 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 13:33:50 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <t6iZj.78706$%15.8745@bignews7.bellsouth.net>

I don't get what the issue is between sites that use Python and being slow, 
if there is one, because there's a website online that shows the results of 
a dozen or so benchmarks when comparing any two languages.  Python beats PHP 
in almost all the benchmarks.  (it also beats almost all the other languages 
(they're all scripting languages) in most of the benchmarks, lua being the 
only exception i remember.)

"cm_gui" <cmgui2 at gmail.com> wrote in message 
news:a725111b-0dce-4923-861a-b7138af602a1 at k10g2000prm.googlegroups.com...
> Python is slow.    Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast. 




From mszpadzik at gmail.com  Fri May 30 06:49:10 2008
From: mszpadzik at gmail.com (Mike)
Date: Fri, 30 May 2008 03:49:10 -0700 (PDT)
Subject: Python threads and memory usage
References: <b50c155f-37e7-4fda-9e20-ba52db9db399@y38g2000hsy.googlegroups.com>
	<n8adnVRcIvt7NKLVnZ2dnUVZ_vSdnZ2d@earthlink.com>
	<2baa96da-be9b-493f-8d8f-156a4cce763d@z72g2000hsb.googlegroups.com>
Message-ID: <9efb0468-f3df-4a03-a064-7f83e4c45403@e53g2000hsa.googlegroups.com>

On May 30, 9:42?am, Mike <mszpad... at gmail.com> wrote:
> On May 30, 9:16?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
>
>
> > On Thu, 29 May 2008 12:01:30 -0700 (PDT), Mike <mszpad... at gmail.com>
> > declaimed the following in comp.lang.python:
>
> > > I observed, that every thread reserved some memory, and after exit
> > > thread doesn't freed it. When i leaved my server working for 3 days,
> > > then it takes 15% of 512MB memory (during that time about 15000
> > > threads were created and stopped). When server starts it only takes
> > > about 1% of memory.
>
> > ? ? ? ? Do you have any outstanding references to the threads? If so, have
> > you performed a .join() with the thread? Until you join it, the thread
> > state (thread local objects/"variables") are probably being held for
> > access from outside the thread.
> > --
> > ? ? ? ? Wulfraed ? ? ? ?Dennis Lee Bieber ? ? ? ? ? ? ? KD6MOG
> > ? ? ? ? wlfr... at ix.netcom.com ? ? ? ? ? ? wulfr... at bestiaria.com
> > ? ? ? ? ? ? ? ? HTTP://wlfraed.home.netcom.com/
> > ? ? ? ? (Bestiaria Support Staff: ? ? ? ? ? ? ? web-a... at bestiaria.com)
> > ? ? ? ? ? ? ? ? HTTP://www.bestiaria.com/
>
> I'm joining threads only during my program exit. I'll try to do what
> You suggest.
>
> THX

It helped. Now all threads are added to thread list and every some
period of time I'm checking which threads are alive (enumerate), and
joining all which aren't. Now [memory usage is still on 1% :D:D:D

Thanks


From kw at codebykevin.com  Sat May 10 11:42:29 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:42:29 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.902.1210433160.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>
	<mailman.902.1210433160.12834.python-list@python.org>
Message-ID: <4825C265.90106@codebykevin.com>

Guilherme Polo wrote:
> 2008/5/10 Zentrader <zentraders at gmail.com>:
>> I like New Mexico Tech's site as well.  Also, take a look at the PMW
>> extension for additional widgets, and TkTable and/or TableListWrapper.
>> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
> 
> There is also Tile, or Ttk since Tk 8.5, if you are interested in
> extensions too.
> Apparently there are three Tile wrappers now, two are incomplete
> (sorry for saying that):
> 
> http://bruno.thoorens.free.fr/ttk.html -- Missing Treeview, big part
> of ttk styling, maybe other things and it is not only a ttk wrapper
> (there are other things besides it)
> http://bugs.python.org/file10010/Tile.py -- Missing several methods in
> Treeview, big part of ttk styling and maybe something else.
> 
> And there is also one I'm doing, that I expect to be complete:
> 
> http://gpolo.ath.cx:81/projects/ttk_to_tkinter/
> 
> Documentation and samples are still lacking, but I'm working on them.
> And I haven't tested it under Windows, so I invite you all to test it.
> 
> Regards,
> 
I'm the maintainer of Tile.py. It may well be incomplete, as it was 
first developed by Martin Franklin a couple of years ago and I've been 
modifying it as my own needs require.

So you're doing your own implementation of ttk in Tkinter as a Google 
Summer of Code Project? Wonderful! Are you planning on submitting it for 
including in Tkinter's core, as I did? If yours proves to be the better 
implementation I'll gladly withdraw mine, as I'm not sure I have time to 
overhaul it extensively.

I'll follow your progress with interest!

--Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From johnjsal at NOSPAMgmail.com  Tue May 13 00:01:59 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: 13 May 2008 04:01:59 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<4827bda2$0$11606$607ed4bc@cv.net> <87od7c6qua.fsf@benfinney.id.au>
Message-ID: <482912b7$0$11641$607ed4bc@cv.net>

Ben Finney wrote:

> I think that the idiom
>
>     for unused in xrange(10):
>         # do stuff with no reference to 'unused'
>
> is quite common. Is that what you're asking about?

Yes. I was more or less asking about the specific situation of using a
for loop to do something X number of times, but I think the more
generalized problem that everyone is talking about -- using a counter
variable that is never referenced in the loop -- probably puts the point
I was trying to make in a better light.

The reason I even brought this up is because I remember someone saying a
while back (probably here on the newsgroup) that the true use of a for
loop was to iterate through a sequence (for the purpose of using that
sequence), not to do something X number of times. Once they made this
comment, I suddenly saw the for loop in a new (and I believe purer)
light. That was the first time I realized what it was really meant
to do.

Using something like:

for unused in xrange(10):
    # do stuff 10 times

suddenly seemed to me like a hackish way to replace

for (int i=0; i<10; i++) {
    // do stuff 10 times;
}

Not that I think the above code (C#) looks all that elegant either. But
in C# there is a distinction between the above, and this:

foreach (int i in sequence)
    // do something;

which is more closely related to the Python for loop.

Now, you could easily make the argument that the Python for loop is a
much simpler tool to accomplish *both* of the above, and I suppose that
makes sense. Seems a little silly to have two separate for loops to do
these things. I just wasn't sure if the "counter" version of the Python
for loop was considered slightly unpythonic.


From aahz at pythoncraft.com  Sat May  3 16:01:14 2008
From: aahz at pythoncraft.com (Aahz)
Date: 3 May 2008 13:01:14 -0700
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
Message-ID: <fvigaa$bdc$1@panix3.panix.com>

In article <mailman.494.1209791508.12834.python-list at python.org>,
Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
>I can't believe some angry responses in this thread - it's just a  
>technical question, not about which is the best team in the [preferred  
>sports here] National Championship...

http://www.netfunny.com/rhf/jokes/91q3/usolym.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Help a hearing-impaired person: http://rule6.info/hearing.html


From jcd at sdf.lonestar.org  Tue May 13 08:15:55 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 13 May 2008 08:15:55 -0400
Subject: Best way to delimit a list?
In-Reply-To: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
Message-ID: <1210680955.6481.7.camel@jcd-desktop>

On Tue, 2008-05-13 at 03:28 -0700, dannywebster at googlemail.com wrote:
> Hi - I have a list returned from popen/readlines, and am wondering how
> to go about iterating over each item which was returned (rather than
> currently having the whole lot returned).
> 
> so far:
> 
> >>> f=os.open("./get_hostnames").readlines
> 
> returns ['host1 host2 host3 ... hostN\n]'
> 
> i'd like to be in a position to iterate through these, grabbing each
> host.  I have played with transmuting to a str, and using split, and
> this works, but I get the subscript brackets from the list output as
> expected, as the list output is now a string literal, and this is not
> what I want - and I think it's a bit long-winded to do a search 'n
> replace on it - hence why I ask in the subject what's the best way.
> 
> >>> f=str(f)
> >>> f.split()
> ["['host1","host2", ... ,"hostN\n']"]
> 

Instead of casting to a string, each element of your list is already a
string, so use that instead:

f = open("get_hostnames")
?hosts =[]

# gets each string one at a time.
for line in f:
    # get rid of the pesky \n at the end
    line = line.strip()
    # separate the hostnames into a list
    hosts += line.split(' ')

> Any help is highly appreciated
> 
> ta
> 
> dan.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From stanc at al.com.au  Tue May 13 05:42:13 2008
From: stanc at al.com.au (Astan Chee)
Date: Tue, 13 May 2008 19:42:13 +1000
Subject: threads problem in python
Message-ID: <48296275.9090602@al.com.au>

Hi,
I have 2 classes in python, the first one runs first and and then the 
first one calls the second class. I want it to run the second class as a 
separate thread but I want the first one to wait until the second class 
is dead.
Im having problem in both killing the second class when its done and 
making the first class wait for it to finish.
Im very confused on doing threads in python.
Thanks for any help.
Astan

-- 
"Formulations of number theory: Complete, Consistent, Non-trivial. Choose two."


Animal Logic
http://www.animallogic.com

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From gagsl-py2 at yahoo.com.ar  Mon May 19 09:29:04 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 May 2008 10:29:04 -0300
Subject: pickle internals
References: <f46c52560805190352ycb62d5dtdad84d55da81bf9d@mail.gmail.com>
Message-ID: <op.ubek2q0jx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 19 May 2008 07:52:25 -0300, Rustom Mody <rustompmody at gmail.com> escribi?:

> I am trying to understand pickle internals.
> This involves:
> -- the algorithm(s) used for traversal arbitrary structures
> -- the pickle format
> -- the use if any of introspection
>
> I'll be thankful for any pointers

Use The Source, Luke!
See pickle.py and pickletools.py - you may post here any questions you have then.

-- 
Gabriel Genellina



From aisaac at american.edu  Thu May  8 10:50:17 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 14:50:17 GMT
Subject: observer pattern question #2 (notification chain)
Message-ID: <JqEUj.52492$Bb3.45491@trnddc01>

I have two questions about the "observer pattern" in Python.

This is question #2.  (I'll put the other is a separate post.)



Consider this standard example of the observer pattern in Python:



<URL:http://en.wikipedia.org/wiki/Observer_pattern>



Now suppose I have a variant.

(I am not a programmer, so this may be a separate related pattern.)

To make it a little concrete and relate it to the discussion at

<URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>,

suppose there are stocks, mutual funds, and investors.

Let us say that funds are observers for stocks,

and investors are observers for funds.

Once a "month" I want all stocks to notify their observing funds

of their end-of-month price, and *then* all fund to notify their

observing investors of their end-of-month investment value.



I see a couple differences from the standard pattern referenced above,

and one problem.



Differences:



- observer/subject linked hierarchy (funds are both observers and subjects)

- many-many relation (a fund is an observer of many stocks)



I think (?) these differences are inessential, but the 

second does create the following problem: if I do not want 

a fund to notify an its investors until all stocks have 

reported, what is the best way to determine the "last report 

in" event?



Here is one way: create a ``reportreceived`` dict that maps 

stocks to True or False, and after each stock notification 

change False to True and check ``all(reportreceived.values())``

to determine whether it is ok to notify investors.  When it 

is ok, then notify investors and reset all the

``reportreceived`` values.



This is meant to be a general description so please do not 

focus on the "real world" aspects, which are only for 

illustration.



Thank you,

Alan Isaac 


From tdelaney at avaya.com  Tue May 27 21:09:05 2008
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 28 May 2008 09:09:05 +0800
Subject: Misuse of list comprehensions?
In-Reply-To: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>

Ian Kelly wrote:

> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
> 
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

Are you aware that filter() returns a list populated from its arguments?

Tim Delaney


From lists at cheimes.de  Fri May  2 15:41:36 2008
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 02 May 2008 21:41:36 +0200
Subject: portable /dev/null
In-Reply-To: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <481B6E70.7000503@cheimes.de>

Brendan Miller schrieb:
> Hi,
> 
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.

import os
null = open(os.devnull, "wb")

:)

Christian


From squareswallower at 1ya2hoo3.net  Sat May 17 11:58:58 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Sat, 17 May 2008 09:58:58 -0600
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
	<0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
Message-ID: <g0mvc2$sic$1@news.xmission.com>

On 2008-05-17 06:01:01 -0600, bearophileHUGS at lycos.com said:

> dave, few general comments to your code:
> - Instead of using a comment that explains the meaning of a function,
> add such things into docstrings.
> - Your names can be improved, instead of f you can use file_name or
> something like that, instead of convert_file you can use a name that
> denotes that the conversion is already done, etc.
> - You can use xrange instead of range and you can indent less, like 4
> spaces.
> - This line may be slow, you may want to find simpler ways to do the
> same thing:
> rkey = random.choice(analyze.keys())
> - I suggest you to add doctests to all your functions.
> 
> Bye,
> bearophile


bear,
thanks for the suggestions.  I use IDLE to write the code and when it's 
working I paste it over into a new window.  I'll tabify before saving 
the pasted code.  To add doctests would I need to use a certain 
filename for the tests to be run on?  Can you have doctests on random 
functions?

Thanks

Dave



From pistacchio at gmail.com  Wed May  7 09:40:29 2008
From: pistacchio at gmail.com (pistacchio)
Date: Wed, 07 May 2008 15:40:29 +0200
Subject: PHP + TinyButStrong Python replacement
References: <fvs2rj$cru$1@aioe.org>
	<bf699c4a-406b-47d7-9844-c6ff7b7a19f1@s50g2000hsb.googlegroups.com>
	<fvsaoa$g46$1@aioe.org> <68dp9jF2sko92U1@mid.uni-berlin.de>
Message-ID: <fvsbgf$mev$1@aioe.org>

Diez B. Roggisch ha scritto:
> pistacchio wrote:
> 
>> Mike Driscoll ha scritto:
>>> On May 7, 6:12 am, pistacchio <pistacc... at gmail.com> wrote:
>>>> hi! i'm a php user and a python programmer. i'd love to use python for
>>>> my server side needs but i can't seem to find what i'm looking for. for
>>>> most of my php work i use mysql and tinyButStrong
>>>> (http://www.tinybutstrong.com) which is a very lightweight template
>>>> engine that offers powerful functionalities. you insert TBS tags in web
>>>> pages like:
>>>>
>>>> <div align="center" class="title-page"> [var.x] </div>
>>>>
>>>> and it replaces [var.x] with the value of global variable x. it also
>>>> makes blocks (and nested blocks) easy to implement:
>>>>
>>>> <p class="text-example2"> [blk1;block=begin] [blk1.val]<br>
>>>> [blk1;block=end] </p>
>>>>
>>>> in the previous code it cycles throu all the values of the array blk1.
>>>>
>>>> it does many more things, like htlm escaping, url and js encoding etc,
>>>> conditional displaying etc, but it is not more confusing that inserting
>>>> pieces of code into the HTML (aka: littering the code and kissing
>>>> goodbye to the code/presentation separation). it comes in the form of a
>>>> single file with a single class that you can easily include in the code
>>>> and go.
>>>>
>>>> now, i've searched the net and it seems full of python-based frameworks
>>>> for doing server side scripting and templating, but none that suits my
>>>> needs.
>>>>
>>>>     1. i like writing code and i like control. i mean, open up the
>>>> simplest text editor and write in it. i don't want something that is
>>>> command-line driven or that writes code for me like ">>>
>>>> makePagesFromThisDatabase()".
>>>>     2. i want something very lightweight. i don't want dozen of options,
>>>> pre-made blogging parts ecc. i just need a good non invasive template
>>>> engine and the basic functions for server side scripting, like session
>>>> managing, request parsing, functions to manipulate html code (encodings
>>>> etc)
>>>>     3. i don't want to beg my hosting provider to install the libraries.
>>>> a simple include file should do the work.
>>>>     4. object oriented programming is not required (better: i prefer
>>>> plain old procedural programming).
>>>>
>>>> any help? thanks in advance
>> hi, thanks for replaying
>>
>>> Did you look at TurboGears or Django? TG uses Kid in the 1.x series
>>> and Genshi in 2.x (I think) for templating purposes. There's also
>>> Cheetah, one of the more powerful Python templating engines out there.
>>>
>> django is exacly the kind of giant i'm trying to avoid
>>
>>> http://genshi.edgewall.org/
>> the first lines of the tutorial read:
>> "First, make sure you have CherryPy 3.0.x installed"
>> Now, cherrypy is something that is not properly "include a file and get
>> going!"
>>> http://www.kid-templating.org/
>> kid seems to have a non-linear approach, but i may give it a try
>>
>>> http://www.cheetahtemplate.org/
>> cheetah was something that i already considered using. have i to
>> "install" it or can i just import it?
> 
> You will need to install any of these. It is part of how python is designed.
> Extendability comes with a price-tag.
> 

well, the problema is exacly that i'm looking for a python module, not 
for a python library.
most of the tasks i need are just:
1. on the shoulders of the existing standard cgi modules, automate an 
render easier the handling of things such as sessions and requests
2. on the shoulders of the existing standard regex module, have a simple 
but complete templating engine and html-related encoder


From ian.g.kelly at gmail.com  Tue May 27 23:42:17 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Tue, 27 May 2008 21:42:17 -0600
Subject: Misuse of list comprehensions?
In-Reply-To: <E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>
References: <3fc761710805271043k2305b96bs125e794c26fcd036@mail.gmail.com>
	<E4C7BCAB1872014F81CEAACD25699B8C9BD7F1@301081ANEX2.global.avaya.com>
Message-ID: <3fc761710805272042v19f06bd5kb39ab85c57b8278b@mail.gmail.com>

On Tue, May 27, 2008 at 7:09 PM, Delaney, Timothy (Tim)
<tdelaney at avaya.com> wrote:
> Ian Kelly wrote:
>
>> It sounds like the wasteful list creation is the biggest objection to
>> using a list comprehension.  I'm curious what people think of this
>> alternative, which avoids populating the list by using a generator
>> expression instead (apart from the fact that this is still quadratic,
>> which I'm aware of).
>>
>> def compress(s):
>>    new = []
>>    filter(None, (new.append(c) for c in s if c not in new))
>>    return ''.join(new)
>
> Are you aware that filter() returns a list populated from its arguments?

Yes.  In this case, it returns an empty list.


From ivan.illarionov at gmail.com  Sat May  3 07:58:28 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sat, 3 May 2008 11:58:28 +0000 (UTC)
Subject: How to use a parameter in a class
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <fvhk14$vjf$1@news.mtu.ru>

On Sat, 03 May 2008 03:05:31 -0700, Decebal wrote:

> I have the following class:
> #####
> class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
> 
>     def testing(self):
>         print 'In test: %d' % self.value
> 
>     def returnValue(self):
>         return self.value
> 
>     result = someFuntion(default = value)
> #####
> 
> But the last line does not work.
> I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
> 
> And that someFunction gets a default value of 12. How can I do that?

class Dummy(object):
    def __init__(self, thisValue):
        self.value = thisValue

    def someFunction(self, default=None):
        if default is None:
            default = self.value

-- 
Ivan


From sjmachin at lexicon.net  Sat May 10 17:59:12 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 14:59:12 -0700 (PDT)
Subject: Python doesn't recognize quote types
References: <eccf2d09-e3ec-4c0f-a9a1-b815a597260b@a70g2000hsh.googlegroups.com>
Message-ID: <c3d669f9-10d1-45d6-9b65-ccfc80b512ce@k1g2000prb.googlegroups.com>

On May 11, 6:56 am, wxPytho... at gmail.com wrote:
> There's a thing that bugs me in Python. Look at this...
>
> >>> print "Testing\"
>
> SyntaxError: EOL while scanning single-quoted string
>
> Please focus on the part of the error message that states "while
> scanning single-quoted string". How can Python claim it scanned a
> single-quoted string when I fed it with a double-quoted string? Is
> quote type (single quote and double quote) recognition not implemented
> in Python?

Read this:
http://docs.python.org/ref/strings.html

Try each of these:
print 'Testing
print 'Testing\'
print 'Testing\'Testing
print 'Testing'
print 'Testing\''
print 'Testing\'Testing'

There's a wrinkle that's common to both your questions: \" causes the
" not to be regarded as (part of) the end marker but to be included as
a data character. Similarly with '. Examples:

>>> print "She said \"Hello!\""
She said "Hello!"
>>> print 'His surname is "O\'Brien"'
His surname is "O'Brien"
>>>

In the error message, "quoted" is the past tense of the verb "to
quote", meaning to wrap a string of characters with a leading string
and a trailing string to mark the contained string as a lexical item,
typically a string constant. The message is intended to convey that
the leading marker has been seen, but an EOL (end of line) was reached
without seeing the trailing marker.

A better error message might be something like "String constant not
terminated at end of line".

Unfortunately the above-mentioned documentation uses xxxxle-quote as a
noun to describe characters -- IMHO this is colloquial and confusing;
it should call ' an apostrophe, not a "single-quote", and all " a
quote, not a "double-quote". The confusion is compounded by referring
to '''abc''' and """xyz""" as triple-quoted strings ... so one might
expect 'abc' and "xyz" to be called "single-quoted strings", and this
sense is what is being used in the error message.

HTH,
John




From kevinw2 at bigpond.com  Sat May 31 08:35:50 2008
From: kevinw2 at bigpond.com (kevin)
Date: Sat, 31 May 2008 22:35:50 +1000
Subject: driver detective crack keygen
In-Reply-To: <280ae4fc-6a59-4f11-9f62-58d4f0fa45c0@w74g2000hsh.googlegroups.com>
References: <280ae4fc-6a59-4f11-9f62-58d4f0fa45c0@w74g2000hsh.googlegroups.com>
Message-ID: <48414626.8080903@bigpond.com>

Hi i was wondering if you did find a keygen or crack for driver 
detective if so could you please help me in my serach for the same . kevin



From vginer at gmail.com  Sat May 17 20:53:50 2008
From: vginer at gmail.com (Vicent Giner)
Date: Sat, 17 May 2008 17:53:50 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<482F71B0.3050808@ncf.ca>
Message-ID: <aeb5e592-8dbc-4640-a8d7-eed869e4c024@i76g2000hsf.googlegroups.com>


>
> The usual answer is that development
> time is more important than running time.

OK, thank you for your answer.

I just wanted to check if it was a naive idea trying to use Python
instead of C in order to implement my own algorithms, and other
research-related code.


>
> Since you are likely to be using arrays,
> you might look at numpy, where the
> number crunching is using compiled C code.

NumPy seeems to be a very interesting and powerful package. Thank you
again.


>
> Try Google with Python and your area of
> interest.  You could well find
> Python-based packages which meet your needs.
>

Yes, I've been giving a try, and I've found some interesting links.

Thank you!

--
Vicent


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From kaka_ilkay at hotmail.com  Thu May 29 03:11:25 2008
From: kaka_ilkay at hotmail.com (kanarya)
Date: Thu, 29 May 2008 07:11:25 -0000
Subject: Anyone using TestNG
Message-ID: <BLU114-DAV23283990ABDFCD00B00D3E6BF0@phx.gbl>

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From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 03:17:03 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 09:17:03 +0200
Subject: Class Methods Vs Any Other Callable
In-Reply-To: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
Message-ID: <482be363$0$25765$426a34cc@news.free.fr>

vbgunz a ?crit :
> I remember learning closures in Python and thought it was the dumbest
> idea ever. Why use a closure when Python is fully object oriented? I
> didn't grasp the power/reason for them until I started learning
> JavaScript and then BAM, I understood them.
> 
> Just a little while ago, I had a fear of decorators because I really
> couldn't find a definitive source to learn them (how to with with @).
> How important are they? They must be important otherwise why have'em
> in the language? I had to learn'em and then suddenly, BAM. I
> understand them.
> 
> My main issue with closures and decorators was hidden in the fact of
> how *dead simple* they were. All I needed were reasons to use them
> over doing it X style. So what is my point? How dead simple are class
> methods? 

Way dumber than closures and HOFs (which is what 'decorators' are when 
you take back the @syntactic sugar).

A classmethod is simply a method that works on the class itself - it 
takes the class as first argument, instead of taking the instance.

> I must be missing there point so I am convinced they must be
> dead simple.
> 
> classes, functions, instance and static methods are easy. So easy in
> fact, I could shoot myself in the foots without looking (preferably
> without aiming). So, why am I stuck on the *idea* of a class method?

Could it be because you don't see the implication of classes being 
objects too ?

> An instance method works on the instance
> A Static method is basically a function nested within a class object
> A class method is overkill?

Nope. It's sometimes pretty usefull.

> I can call a static or class method through either the class OR any
> instance of it. I've never designed a method that took advantage of
> the class name except in cases where I needed to extend a super class
> *but* even in this case, I didn't use the enclosing class name...

s/name//g

What you have is the class *object*, not the class name.

> Whats the deal with class methods, why use them over anything else?
> What does a class method accomplish in at least one line shorter than
> anything else? Does it help reduce duplication or typing? I am at a
> lost for words that can shed at least *one* good reason to use them.
 > What is the one greatest reason to use them?

Factory methods (alternate constructors...) is probably the most obvious 
use case. You need to get at the class to instanciate it, don't you ? An 
example of this pattern is dict.fromkeys().

You'll find a more elaborate example here too:
http://groups.google.fr/group/comp.lang.python/browse_frm/thread/65868e8a12bcf375/a31bb0e13bf09316#a31bb0e13bf09316

HTH


From dullrich at sprynet.com  Mon May 26 05:53:08 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 26 May 2008 04:53:08 -0500
Subject: access interactive namespace from module (shared namespace?)
References: <mailman.1564.1211709217.12834.python-list@python.org>
	<f1b_j.6567$_03.5547@reader1.news.saunalahti.fi>
	<d4ce4b77-c995-48b4-a078-1d822aedd9d8@59g2000hsb.googlegroups.com>
	<loki349lg34kguvoshfmje0h5rkvmoiot7@4ax.com>
	<79478cee-4bc6-426f-9e64-04841aee1f3d@k37g2000hsf.googlegroups.com>
Message-ID: <mu1l34d26du99tpbvei0nua234t0ujkica@4ax.com>

On Sun, 25 May 2008 05:56:37 -0700 (PDT), ulrich at dorda.net wrote:

>Thanks a lot to all!
>
>Apart from obtaining the solution I was searching for, I learned a lot
>by studying your answers!

Since my solution seems to have been the one you were looking
for (I was surprised nobody else suggested it) maybe I should
enphasize that people better informed than me had the same
reaction as I did to your question:

While this is something you can do if you want it's reallly hard
to see why it's a good idea - simply passing data to functions
in the other unit as parameters seems better.

>Cheers,
>
>Ulrich

David C. Ullrich


From casey.mcginty at gmail.com  Sun May 25 18:07:19 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sun, 25 May 2008 12:07:19 -1000
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <ae3f58470805251507m3f9c6br828b2e8bfe06c7b8@mail.gmail.com>

http://art.gnome.org/
http://www.gnome-look.org/
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From byte8bits at gmail.com  Thu May 15 13:27:11 2008
From: byte8bits at gmail.com (brad)
Date: Thu, 15 May 2008 13:27:11 -0400
Subject: Pass data from Python to C++
Message-ID: <g0hrq3$rfb$1@solaris.cc.vt.edu>

I have some c++ binaries that do rather intense number computations. 
They do it well and rather quickly compared to other languages (not just 
Python). An example:

> brad at qu:~/$ date && ./compute.cpp.o < 1_million.txt > /dev/null && date
> Thu May 15 13:08:28 EDT 2008
> Thu May 15 13:08:31 EDT 2008
> brad at qu:~/$ date && python compute.py < 1_million.txt > /dev/null && date
> Thu May 15 13:08:38 EDT 2008
> Thu May 15 13:14:50 EDT 2008

In this case, c++ does one million things in 3 seconds that Python takes 
more than 6 minutes to do. The one million is a minimum. At times the 
computations are in the billions. This is why c++ was chosen.

However, other components can be written in a more user friendly, more 
easily maintained language. We've chosen Python for this. The main 
question now is how to pass the computationally heavy info to c++ from 
within Pyhton. os.system is not ideal. Just wondering how other folks do 
this? I have source to some of the c++ code, but some of it is in binary 
from only. It can take stdin or arguments.

Thanks for any tips,

Brad



From wxPythoner at gmail.com  Sun May 11 04:02:15 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Sun, 11 May 2008 01:02:15 -0700 (PDT)
Subject: Unimport statement
Message-ID: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>

We should have that statement, so that problems, expressed in
http://groups.google.com/group/comp.lang.python/browse_thread/thread/3bda1fc4895ec886/bc5fe40cfbd10124?lnk=raot#bc5fe40cfbd10124,
would not occur.


From ralf at schoenian-online.de  Thu May  1 10:17:12 2008
From: ralf at schoenian-online.de (=?ISO-8859-1?Q?Ralf_Sch=F6nian?=)
Date: Thu, 01 May 2008 16:17:12 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
Message-ID: <4819d093$0$6552$9b4e6d93@newsspool3.arcor-online.net>

idev schrieb:
> Hi all,
> Please help me with my stuff.
> 
> I downloaded python 2.5.1 package from http://blastwave.org it was
> compiled using Sun Studio 11 for Solaris 8 sparc.
> 
> My system is Solaris 10 sparc and I compiled using SunStudio 11
> psycopg2 python binding for PostgreSQL 8.3.1.
> 
> Compilation was OK, but when I am trying to import psycopg2 I am
> getting this error:
> 
> $ python
> Python 2.5.1 (r251:54863, Nov  3 2007, 02:54:52) [C] on sunos5
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import psycopg2
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/opt/csw/lib/python/site-packages/psycopg2/__init__.py", line
> 60, in <module>
>     from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
> ImportError: ld.so.1: python: fatal: relocation error: file /opt/csw/
> lib/python/site-packages/psycopg2/_psycopg.so: symbol round:
> referenced symbol not found
> 
> Any suggestions or help will be appreciated.

Hi,

maybe a stupid question - but why don't you want to use the "official" 
package? You can download it here: 
http://sunfreeware.mirrors.tds.net/indexsparc10.html

Regards,
Ralf


From agustin.villena at gmail.com  Wed May 21 19:45:49 2008
From: agustin.villena at gmail.com (Agustin Villena)
Date: Wed, 21 May 2008 16:45:49 -0700 (PDT)
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org> 
	<483406a0$0$10773$426a74cc@news.free.fr>
Message-ID: <6a8c7499-7d8c-4d5d-9ea6-a3e1ba2f9565@c58g2000hsc.googlegroups.com>


> And not that useful - why would one care about the function being
> defined in class X or Y when one have the exact file and line ?

I have 3 reasons:

1) My developing time is expended running unit tests and browsing
tracebacks to find which is the real problem. Knowing the offender
class (instead of the method alone) makes me understand more quickly
which component of my software is failing.
2) There are some ocassions where I only have the traceback (e.g. when
analyzing an app's log) and no inmediate access to teh source code
3) And finally, for completeness: If a function is really a method, if
the traceback show only its name and not the class that defines it,
for me its a bug, because the method name has no sense out of its
class.

Just my two cents

Agustin



From mnordhoff at mattnordhoff.com  Sun May 18 23:55:17 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Mon, 19 May 2008 03:55:17 +0000
Subject: Get all the instances of one class
In-Reply-To: <2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<2C2F5120-5EE5-4F04-9A8F-F37DA85FCD9E@comhem.se>
Message-ID: <4830FA25.5000806@mattnordhoff.com>

Tommy Nordgren wrote:
> class MyClass : a_base_class
>       memberlist=[]
> 
> #  Insert object in memberlist when created;
> #  note: objects won't be garbage collected until removed from memberlist.

Just to say, if you wanted to go about it that way, you could avoid the
garbage collection problem by using weakrefs:

<http://docs.python.org/lib/module-weakref.html>
-- 


From castironpi at gmail.com  Thu May 15 20:40:15 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 17:40:15 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<200805152005.52062.kyrie@uh.cu>
	<mailman.1200.1210896482.12834.python-list@python.org>
Message-ID: <e742ff24-d76b-422c-9284-f6eddeb1789e@34g2000hsf.googlegroups.com>

On May 15, 7:07?pm, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 8:05 PM, Luis Zarrabeitia <ky... at uh.cu> wrote:
> > On Thursday 15 May 2008 09:32:37 am castironpi wrote:
> >> Why can't I write this?
> >> --
> >>http://mail.python.org/mailman/listinfo/python-list
>
> > yield recieved.
>
> > Thanks.
>
> Should that be
>
> ack yield
>
> ?

I'd be putting parachutes on people's screens, but on a newsgroup.  I
might have time-parachutes too: something that lands softer.


From squareswallower at 1ya2hoo3.net  Sat May 31 20:43:10 2008
From: squareswallower at 1ya2hoo3.net (dave)
Date: Sat, 31 May 2008 18:43:10 -0600
Subject: Bring object 'out of' Class?
Message-ID: <g1srau$gn2$1@news.xmission.com>

Hello,

I'm currently on the class section of my self-taught journey and have a 
question about classes:  is it possible to bring a object created 
inside the class definitions outside the class so it can be accessed in 
the interpreter?

For example, right now I'm working (within Allen Downey's Python 
Programmer book) with creating a 'hand' of cards.  I want to be able to 
deal to 'x' amount of cards to 'x' amount of hands and then be able to 
manipulate those hands afterwards.  I'm not sure if even what I'm 
asking is possible or if I'm getting ahead of myself.

As always, thanks for all your help.  My learning is greatly enhanced 
with everyone's input on this board.  Please feel free to 
comment/critique the code...

Here is the section of code that deals hands (but doesn't do anything 
past that):

    def deal_cards(self, num_of_hands, num):
        '''deals x amount of cards(num) to each hand'''
        for i in range(num_of_hands):
            handname = Hand('hand%d' % i)
            self.deal(handname, num)
            print '::::%s::::' % (handname.label), '\n', handname, '\n'



and here is the all of the code:

#!/usr/bin/env python

import random

class Card:
    """represents a playing card
    attributes: rank, suit"""

    def __init__(self, suit=0, rank=3):
        self.suit = suit
        self.rank = rank

    suit_names = ["Clubs", "Diamonds", "Hearts", "Spades"]
    rank_names = [None, "Ace", "Two", "Three", "Four", "Five", "Six", "Seven",
                  "Eight", "Nine", "Ten", "Jack", "Queen", "King"]

    def __str__(self):
        #prints card in format: Rank 'of' Suit#
        return '%s of %s' % (Card.rank_names[self.rank],
                            Card.suit_names[self.suit])

    def __cmp__(self, other):
        #evaluates which card is ranked higher by suit/rank
        #arbitrary definition. depends on the card game
        card1 = self.suit, self.rank
        card2 = other.suit, other.rank
        return cmp(card1, card2)


class Deck:
    """represents a deck of cards. 52 card, 4 suits, 13 cards/suit"""

    def __init__(self):
        self.cards = []
        for suit in range(4):
            for rank in range(1, 14):
                card = Card(suit, rank)
                self.cards.append(card)

    def __str__(self):
        res = []
        for card in self.cards:
            res.append(str(card))
        return '\n'.join(res)

    def pop_card(self):
        '''removes a card and returns it to another object'''
        return self.cards.pop()

    def add_cards(self, card):
        #adds a card to an object
        return self.cards.append(card)

    def shuffle(self):
        '''must import random, shuffles the deck'''
        random.shuffle(self.cards)

    def sort_deck(self):
        self.cards.sort()

    def deal(self, hand, num):
        '''moves cards from one object to another'''
        for i in range(num):
            hand.add_cards(self.pop_card())

    def deal_cards(self, num_of_hands, num):
        '''deals x amount of cards(num) to each hand'''
        for i in range(num_of_hands):
            handname = Hand('hand%d' % i)
            self.deal(handname, num)
            print '::::%s::::' % (handname.label), '\n', handname, '\n'




    class Hand(Deck):
    """child class of Deck. Represents a hand of cards"""

    def __init__(self, label=" "):
        self.cards = []
        self.label = label



From ptmcg at austin.rr.com  Fri May 16 11:37:44 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 16 May 2008 08:37:44 -0700 (PDT)
Subject: Pyparsing Question
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <ed19e75a-e4e9-42e3-853c-831787884999@d77g2000hsb.googlegroups.com>

On May 16, 6:43?am, Ant <ant... at gmail.com> wrote:
> Hi all,
>
> I have a question on PyParsing. I am trying to create a parser for a
> hierarchical todo list format, but have hit a stumbling block. I have
> parsers for the header of the list (title and description), and the body
> (recursive descent on todo items).
>

LineStart *really* wants to be parsed at the beginning of a line.
Your textline reads up to but not including the LineEnd.  Try making
these changes.

1. Change textline to:

     textline = pp.Combine(
        pp.Group(pp.Word(pp.alphas, pp.printables) + pp.restOfLine)) +
\
        pp.LineEnd().suppress()

2. Change comb to:

    comb = head + parser

With these changes, my version of your code runs ok.

-- Paul


From stefan_ml at behnel.de  Fri May  2 10:40:25 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 02 May 2008 16:40:25 +0200
Subject: Do you know of a much simpler way of writing a program that writes
	a program?
In-Reply-To: <mailman.455.1209736660.12834.python-list@python.org>
References: <mailman.455.1209736660.12834.python-list@python.org>
Message-ID: <481B27D9.3000107@behnel.de>

mcse jung wrote:
> Here is asample program that writes a program and then executes it.  
> Do you knowof a much simpler way of writing a program that writes a program?

I'm not quite sure what you are trying to achieve here, but I bet there is a
simpler way to do it than by generating a script. You might want to look into
functions.

http://docs.python.org/tut/node6.html#SECTION006600000000000000000

Stefan


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:14:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:14:38 +0200
Subject: C-like assignment expression?
In-Reply-To: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <48340412$0$10773$426a74cc@news.free.fr>

boblatest at googlemail.com a ?crit :
> Hello,
> 
> I have an if-elif chain in which I'd like to match a string against
> several regular expressions. Also I'd like to use the match groups
> within the respective elif... block. The C-like idiom that I would
> like to use is this:
> 
> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match

<ot>
Isn't it the third or fourth time this very same question pops up here ? 
  Starts to look like a FAQ.
</ot>

The canonical solution is to iterate over a list of expression,function 
pairs, ie:

def use_match1(match):
    # code here

def use_match2(match):
    # code here

def use_match3(match):
    # code here

for exp, func in [
     (my_re1, use_match1),
     (my_re2, use_match2),
     (my_re3, use_match3)
     ]:
     match = exp.match(line)
     if match:
        func(match)
        break


The alternate solution is Diez's Test object.

HTH


From mail at timgolden.me.uk  Fri May 16 07:09:51 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 12:09:51 +0100
Subject: Problem creating a shorcut
In-Reply-To: <c550g5-l5f.ln1@darkstargames.dnsalias.net>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <482D6B7F.20307@timgolden.me.uk>

Wolfgang Draxinger wrote:
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.

With respect, the OP is creating a Windows desktop shortcut.
Unless Microsoft suddenly decide to change their use of the 
backslash, I suggest that this is a needless generalisation.

> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. 

This is broadly true. However, it's fairly clear from the
phrase "the user's desktop" that the OP is working in some
kind of corporate environment where he can be fairly sure
where Firefox is installed by policy. In addition, it's not so
easy to find its path if it's not in the default place since apps 
very rarely add their location to the system PATH these days 
(and Firefox certainly doesn't). You could scan the registry for 
its App Paths entry in the registry but I don't know if any other 
way if it's not  the default browser (which it's clear from the 
original post it  may not be).

Sorry to sound a bit negative, but I felt that a couple of your points, 
while valid, were not altogether helpful to the situation the OP was in.

TJG



From zephyrfalcon!NO_SPAM! at gmail.com  Sat May 17 09:59:57 2008
From: zephyrfalcon!NO_SPAM! at gmail.com (Hans Nowak)
Date: Sat, 17 May 2008 09:59:57 -0400
Subject: Classmethods are evil
In-Reply-To: <g0llbe$2k6o$1@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <MwBXj.47168$3v1.19158@bignews3.bellsouth.net>

Ivan Illarionov wrote:
> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
> 
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

I agree with your sentiments, although I'm not sure I would pick metaclasses 
over class methods... or over anything at all, for that matter. :-)

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.
> 2. They are slower than metaclass methods or plain functions.

The way I see it, a class method is really just sugar for a function operating 
on the class, living in the class namespace.  As such, they are basically 
redundant, and as you point out, they can always be replaced by a function 
outside the class (and in fact, this was what people did before they came along 
in 2.2).  Personally, I don't use them... but some people like them.  Different 
strokes, and all that...

--Hans


From gagsl-py2 at yahoo.com.ar  Thu May 15 21:24:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 22:24:51 -0300
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <op.ua73jpu3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 12:13:56 -0300, Mike Driscoll <kyosohma at gmail.com>  
escribi?:

> I've had this niggling issue from time to time. I want to create a
> shortcut on the user's desktop to a website that specifically loads
> Firefox even if Firefox is not the default browser.
>
> I usually use COM as it allows very specific settings of the shortcut,
> such as the Working Directory and the Target Path. However, the
> following will not work for some reason:

Try this different approach, using the IShellLink interface:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/pywin32/win32com.shell_and_Windows_Shell_Links.html

-- 
Gabriel Genellina



From enleverlesX.XmcX at XmclaveauX.com  Wed May  7 12:06:01 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 7 May 2008 18:06:01 +0200
Subject: Idea for P3K
Message-ID: <4821d418$0$932$ba4acef3@news.orange.fr>

Hi!

print become a function ; OK

I thought: and why the affection (=) would not become, also, a function?
Examples:
        a = 123                            return 123
        b,c = 543.21, "LOL"        return  (543.21, "LOL")



@-salutations

Michel Claveau



From greg at cosc.canterbury.ac.nz  Tue May 13 19:51:17 2008
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 14 May 2008 11:51:17 +1200
Subject: ANN: Pyrex 0.9.7.2
Message-ID: <mailman.1113.1210751214.12834.python-announce-list@python.org>

Pyrex 0.9.7.2 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Seems I didn't quite eradicate all of the integer
indexing bugs. Here's a fix for the other half.

What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.


From ivan.illarionov at gmail.com  Sun May 25 08:14:25 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 12:14:25 +0000 (UTC)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1bl71$1id1$1@news.mtu.ru>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:

> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution is
> not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x'] funclist = [eval('lambda x:' +
>>>> func) for func in func_strings] len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False
> 
> 
> Thanks in advance
> 
> Martin

Maybe make a set of code objects?

func_code_set = set([f.func_code for f in funclist])

funclist = []
for fc in func_code_set:
    f = lambda x: x
    f.func_code = fc
    funclist.append(f)

-- Ivan


From duncan.booth at invalid.invalid  Sat May 24 13:21:40 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 May 2008 17:21:40 GMT
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
Message-ID: <Xns9AA8BAD1431Cduncanbooth@127.0.0.1>

David <wizzardx at gmail.com> wrote:


> Problem 2: Slows down prototyping
> 
> In order to get a new system working, it's nice to be able to throw
> together a set of modules quickly, and if that doesn't work, scrap it
> and try something else. There's a rule (forget where) that your first
> system will always be a prototype, regardless of intent.

That's fine. It's alright to prototype without tests. The only rule is that 
you cannot then use any of that code in production.

> Problem 3: Slows down development in general
> 
> Having to write tests for all code takes time. Instead of eg: 10 hours
> coding and say 1/2 an hour manual testing, you spend eg: 2-3 hours
> writing all the tests, and 10 on the code.
> 
You are either a very slow coder or a very poor tester: there should be a 
lot more than 1/2 hour testing for 10 hours coding. I would say the 
comparison might be 10 hours coding, 10 hours testing, then about a week 
tracking down the bugs which escaped testing and got out to the customers. 
With proper unit tests you will reduce all 3 of these numbers but 
especially the last one. Any bug which gets away from the programmer and is 
only caught further downstream costs vastly more than bugs caught during 
development, and not just for the programmer but everyone else who 
affected.

You seem to think that people are suggesting you write all the tests up 
front: what you should be doing is interleaving design+testing+coding all 
together. That makes it impossible to account for test time separately as 
the test time is tightly mixed with other coding, what you can be sure 
though is that after an initial slowdown while you get used to the process 
your overall productivity will be higher.

The first time you make a change to some code and a test which is 
apparently completely unrelated to the change you made breaks is the point 
when you realise that you have just saved yourself hours of debugging when 
that bug would have surfaced weeks later.

> Clients, deadlines, etc require actual software, not
> tests for software (that couldn't be completed on time because you
> spent too much time writing tests first ;-)).

Clients generally require *working* software. Unfortunately it is all too 
easy to ship something broken because then you can claim you completed the 
coding on time and any slippage gets lost in the next 5 years of 
maintenance.


From afilash+python at gmail.com  Wed May 21 12:55:52 2008
From: afilash+python at gmail.com (abhilash pp)
Date: Wed, 21 May 2008 22:25:52 +0530
Subject: can someone with guessing a number
In-Reply-To: <9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
Message-ID: <9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>

    if tries > 10:
        print 'you failed- give up'
        break
<------------------- use this

On Wed, May 21, 2008 at 10:24 PM, abhilash pp
<afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
wrote:

>
>
>     if tries > 10:
>         print 'you failed- give up'
>
>
> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
>
>>  I would just like the program to exit after guessing the amount of
>> numbers wrong
>>
>> # Guess My Number
>> import random
>> the_number = random.randrange(100) + 1
>> tries = 1
>> # guessing loop
>> while (guess != the_number):
>>     if (guess > the_number):
>>         print "Lower..."
>>     else:
>>         print "Higher..."
>>
>>     guess = int(raw_input("Take a guess: "))
>>     tries += 1
>>     if tries > 10:
>>         print 'you failed- give up'
>>
>> print "You guessed it!  The number was", the_number
>> print "And it only took you", tries, "tries!\n"
>>
>> raw_input("\n\nPress the enter key to exit.")
>>
>> many Thanks
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
>
>
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From basti.wiesner at gmx.net  Sat May 24 18:46:41 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sun, 25 May 2008 00:46:41 +0200
Subject: Hexadecimal: how to convert 'ED6F3C01' to "\xED\x6F\x3C\x01" in
	python coding?
References: <a6793c5c-1592-467f-8f2e-8c24b5f1e8a4@f24g2000prh.googlegroups.com>
Message-ID: <g1a5ti$7gm$00$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ zxo102 <zxo102 at gmail.com> ]

>    how  to change the hexadecimal 'ED6F3C01' (or 'ED 6F 3C 01') to
> "\xED\x6F\x3C\x01" in python coding?
> When I take 'ED6F3C01' as a string and insert '\x' into it, I just got
> the error information : invalid \x escape.

[1]--> 'ED6F3C01'.decode('hex')
Out[1]: '\xedo<\x01'

- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkg4mtEACgkQn3IEGILecb7W6ACeNwr/vavkaXluvc0zeSa4cy1N
YFIAoJjMsrRcLhqAPRxKktUqt7miMTrs
=jxll
-----END PGP SIGNATURE-----


From frankdmartinez at gmail.com  Sat May 10 19:22:37 2008
From: frankdmartinez at gmail.com (frankdmartinez at gmail.com)
Date: Sat, 10 May 2008 16:22:37 -0700 (PDT)
Subject: Initializing a subclass with a super object?
Message-ID: <17fce6b5-6506-4e78-8ba1-d8d1bb33c8a4@34g2000hsh.googlegroups.com>

Class A inherits from class B.  Can anyone point me in the direction
of documentation saying how to initialize an object of A, a1, with an
object of B, b1?


From google at mrabarnett.plus.com  Tue May 27 18:15:47 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Tue, 27 May 2008 15:15:47 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<69g2bpF31ttuuU1@mid.uni-berlin.de> 
	<69g605F2v4102U2@mid.uni-berlin.de>
	<027e0b24$0$26906$c3e8da3@news.astraweb.com> 
	<mailman.1660.1211910251.12834.python-list@python.org>
Message-ID: <55bb091b-c012-4a02-91b3-1d14daf91395@c65g2000hsa.googlegroups.com>

On May 27, 6:43 pm, "Ian Kelly" <ian.g.ke... at gmail.com> wrote:
> On Tue, May 20, 2008 at 11:19 AM, John Salerno <johnj... at nospamgmail.com> wrote:
> > "Diez B. Roggisch" <de... at nospam.web.de> wrote in message
> >news:69g605F2v4102U2 at mid.uni-berlin.de...
> >> After being corrected about missing the construction of a None-containing
> >> list, one needs of course to think about the waste of resources, as a
> >> possible result-list is created in any case.
>
> > Yeah, I was already aware of the list of Nones, which is why I asked. Simply
> > typing the list comprehension without an assignment just *looked* wrong,
> > too.
>
> It sounds like the wasteful list creation is the biggest objection to
> using a list comprehension.  I'm curious what people think of this
> alternative, which avoids populating the list by using a generator
> expression instead (apart from the fact that this is still quadratic,
> which I'm aware of).
>
> def compress(s):
>    new = []
>    filter(None, (new.append(c) for c in s if c not in new))
>    return ''.join(new)

It could be shorter:

def compress(s):
    new = []
    return filter(None, (new.append(c) for c in s if c not in new)) or
''.join(new)

:-)


From cokofreedom at gmail.com  Wed May 28 10:32:07 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 28 May 2008 07:32:07 -0700 (PDT)
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com> 
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com> 
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com> 
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com> 
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru> 
	<g1icn8$r5$1@news.mtu.ru> <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
Message-ID: <298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>

On May 28, 1:42 pm, Michael Fesser <neti... at gmx.de> wrote:
> .oO(Ivan Illarionov)
>
> >No. Language does matter.
>
> And the weather.
>
> If you know how to program, you can write good code in any language if
> you're familiar enough with it. Many people write good code in PHP, and
> many write total crap in C/C++. It's almost never about the language,
> but about the programmer.
>
> Micha

I'd like to see someone coming from an OO programming background write
good Haskell, Pure Functional Programming code even with a high level
of OO experience. Language matters.


From duncan.booth at invalid.invalid  Sat May 24 17:15:58 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 May 2008 21:15:58 GMT
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
Message-ID: <Xns9AA8E28C4305Dduncanbooth@127.0.0.1>

David <wizzardx at gmail.com> wrote:

> So, at what point do you start writing unit tests? Do you decide:
> "Version 1 I am going to definitely throw away and not put it into
> production, but version 2 will definitely go into production, so I
> will start it with TDD?".

If you are going to prototype something without tests then you decide that 
up-front and throw the code away afterwards. It never is version 1 nor 2.

> 
> Where this doesn't work so well is if version 2 is a refactored and
> incrementally-improved version of version 1. At some point you need to
> decide "this is close to the version that will be in production, so
> let's go back and write unit tests for all the existing code".

No you've gone beyond prototyping at that point. Prototypes are for 
throwing away.

> Seriously, 10 hours of testing for code developed in 10 hours? What
> kind of environment do you write code for? This may be practical for
> large companies with hordes of full-time testing & QA staff, but not
> for small companies with just a handful of developers (and where you
> need to borrow somone from their regular job to do non-developer
> testing). In a small company, programmers do the lions share of
> testing. For programmers to spend 2 weeks on a project, and then
> another 2 weeks testing it is not very practical when they have more
> than one project.

I've done plenty of projects using conventional methods in small companies. 
If anything test time equal to development time is a vast underestimate.

> 
> As for your other points - agreed, bugs getting to the customer is not
> a good thing. But depending on various factors, it may not be the end
> of the world if they do. eg: There are many thousands of bugs in open
> source bug trackers, but people still use open source for important
> things. Sometimes it is better to have software with a few bugs, than
> no software (or very expensive, or very long time in development). See
> "Worse is Better": http://en.wikipedia.org/wiki/Worse_is_better. See
> also: Microsoft ;-)
> 

I'm not saying it is the end of the world. What it is though is expensive. 
If as the developer you spot a problem and fix it then all the time is 
yours. If it is caught in QA then it involves bug reporting, assigning 
priority, fixing and then the code has to be re-tested. If the customer 
finds the problem then customer support has to report it, someone has to 
assign it a priority, someone has to figure out how to replicate it, then 
someone has to figure out the problem, then you have to fix it, then the 
code has to be re-tested. Every level out from the initial developer you 
increase the number of people and number of steps involved.

The other reason is that if your unit test breaks after you've just written 
5 lines of code then you know which 5 lines of code are the problem. 
Probably you can see the problem instantly. At worst you just hit undo in 
your editor and try again. If a bug report comes back months later you have 
no idea where look in thousands of lines of code.

> 
> The next time your project is running late, your manager and the
> customer will be upset if you spend time updating your unit tests
> rather than finishing off the project (and handing it over to QA etc)
> and adding the unit tests when there's actually time for it.

But you aren't updating unit tests. What you are doing is coding: the tests 
are an integral part of that, or rather the tests are part of the final 
design rather than coding.

> 
>>> Clients, deadlines, etc require actual software, not
>>> tests for software (that couldn't be completed on time because you
>>> spent too much time writing tests first ;-)).
>>
>> Clients generally require *working* software. Unfortunately it is all
>> too easy to ship something broken because then you can claim you
>> completed the coding on time and any slippage gets lost in the next 5
>> years of maintenance.
> 
> That's why you have human testing & QA. Unit tests can help, but they
> are a poor substitute. If the customer is happy with the first
> version, you can improve it, fix bugs, and add more unit tests later.

No, they aren't a substitute at all. You still need human testing and QA, 
the difference is that with a good set of unit tests you reduce the number 
of times code comes back from QA before it can be passed and make it more 
likely that the customer will be happy with the first version.



From jamesd at echeque.com  Tue May 20 00:03:41 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 14:03:41 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
	<mailman.1371.1211245489.12834.python-list@python.org>
Message-ID: <u8j434lrmdfnc7kjlb1420b0l4o4a8jmme@4ax.com>

On Mon, 19 May 2008 21:04:28 -0400, "David Stanek"
<dstanek at dstanek.com> wrote:
> What is the difference if you have a process with 10 threads or 10
> separate processes running in parallel? Apache is a good example of a
> server that may be configured to use multiple processes to handle
> requests. And from what I hear is scales just fine.
> 
> I think you are looking at the problem wrong. The fundamentals are the
> same between threads and processes.

I am not planning to write a web server framework, but to use one.
Doubtless a python framework could be written to have satisfactory
scaling properties, but what are the scaling properties of the ones
that have been written?

--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From bruno.desthuilliers at gmail.com  Wed May 14 16:38:41 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:38:41 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<238061d6-9423-44c1-90b2-cc09f392db9b@p25g2000hsf.googlegroups.com>
Message-ID: <02de1dee-8416-47a8-8195-e344cae6d31f@k37g2000hsf.googlegroups.com>

On 14 mai, 16:30, George Sakkis <george.sak... at gmail.com> wrote:
> On May 14, 10:19 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > An instance method works on the instance
> > > A Static method is basically a function nested within a class object
> > > A class method is overkill?
>
> > If anything, a static method is overkill. See it this way: *if* you for some
> > reason put a method into an enclosing context - isn't it worth having a
> > reference to that?
>
> My feeling exactly; these days I almost always use class methods
> instead of static. I vaguely remember seeing somewhere an example
> where a static method was the only (elegant) solution; neither a class
> method nor a plain function would do. I'll post it if I find it unless
> someone beats me to it.

No concrete example here but I surely remember having used
staticmethods in one case where I needed class-based polymorphic
dispatch and eventually implementation inheritance (to get a default
implementation)  for something that didn't required access to the
class object.



> George



From sn at sncs.se  Tue May 27 11:48:07 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 08:48:07 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<6a2ndjF35q29pU1@mid.uni-berlin.de>
Message-ID: <0b18caad-4fbf-46e8-887f-ce29963e24a0@m3g2000hsc.googlegroups.com>

Good luck to you to. Its just that it .. well it has never been easy
for me to introduce Python at work. This py3k, if I like it or not, is
not making it easier.

Praktical, pragmatic, you know --- as I said, its not broken so lets
brake it

I just try to get things to work. And with some style too. Their
connected. I think a 6 cylinder engine is one of the most stylist
things there are. And when I was at a museum in Stocholm, I saw Henry
Fords original enginge and was amazed, it looks just like the one in
dads car.

Its not about changing and yes I dislike py3k, till somebody can
convince me otherwise

Guido just seems to not care to post here anyways, so we can try to
make our own branch/business


S.

On May 27, 5:24 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Sverker Nilsson wrote:
> > I was talking about Guido van Rossum
>
> > The one who decides, so far when people agree
>
> > But we can make a new fork
>
> Good luck with that. Weren't you the one concerned about changes in Py3K
> that forced you to change your memory profiler? Now you want to introduce a
> *third* codebase beside python2.x and python3.x? Interesting course of
> action.
>
> > He is the originator, but now it seems, for me, it is hanging out in
> > the air
>
> Why do you think so? Because you don't like Py3K?
>
> > So we need some new leadership
>
> > From somebody, somebody like you perhaps. Or me.
>
> Well - be my guest to form your own cult.
>
> Diez



From ndbecker2 at gmail.com  Thu May  1 13:57:33 2008
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 01 May 2008 13:57:33 -0400
Subject: send gpg encrypted emails (properly mime formatted)
Message-ID: <fvd0ad$kbh$1@ger.gmane.org>

Any ideas on python packages that could help with sending gpg encrypted
(properly mime formatted) emails?

My idea is to forward all my emails to a remote imap server, but gpg encrypt
them to myself in the process.



From hdante at gmail.com  Tue May 13 14:02:51 2008
From: hdante at gmail.com (hdante)
Date: Tue, 13 May 2008 11:02:51 -0700 (PDT)
Subject: [off-topic] Usenet
Message-ID: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>


Hello,

 How can I access Usenet without using Google Groups ? (my ISP doesn't
have a NNTP server). Do you recommend doing so ?

 What's your prefered news reader ?


From afrobeard at gmail.com  Wed May 28 08:47:08 2008
From: afrobeard at gmail.com (afrobeard)
Date: Wed, 28 May 2008 05:47:08 -0700 (PDT)
Subject: Simple Doc Test failing without any reason [Help Needed]
References: <22fe8c7c-f2fa-4fe5-92c0-a3934229fb5e@u6g2000prc.googlegroups.com>
	<6ec02c90-be78-44b7-9838-a7e540a56a0d@m3g2000hsc.googlegroups.com>
Message-ID: <6117786a-ae42-493f-8120-be16233b2980@l17g2000pri.googlegroups.com>

I copied the text off here into a new file and it worked!.

I then took a diff between the version that didnt work and the version
that worked and the only difference was a couple of spaces after this
line:-

>>> sanitize_number('0321-4683113')<There were some spaces in these angle brackets>

Apparently they caused the test case to fail on this.

Weird behavior :/

Thanks for your time Gerard and thanks to everyone else too.


On May 28, 5:11?pm, Gerard Flanagan <grflana... at gmail.com> wrote:
> On May 28, 1:48 pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following following code fails with the failiure:-
>
> > File "test.py", line 27, in __main__.sanitize_number
> > Failed example:
> > ? ? sanitize_number('0321-4683113')
> > Expected:
> > ? ? '03214683113'
> > Got:
> > ? ? '03214683113'
>
> > Expected and Got looks the same. The value should verify. ?What am I
> > doing wrong here ?
>
> > Thanks in advance. I really appreciate your time.
>
> > P.S. I tested this Python2.5 installed on both Ubuntu Hardy Heron and
> > Windows XP
>
> Your code works for me (Python 2.5 WinXP).
>
> Are you mixing tabs and spaces?
>
> G.



From rridge at caffeine.csclub.uwaterloo.ca  Thu May 22 05:09:18 2008
From: rridge at caffeine.csclub.uwaterloo.ca (Ross Ridge)
Date: Thu, 22 May 2008 05:09:18 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com>
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>
	<ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com>
Message-ID: <g13d7u$5gn$1@rumours.uwaterloo.ca>

Henrique Dante de Almeida  <hdante at gmail.com> wrote:
> Finally (and the answer is obvious). 387 breaks the standards and
>doesn't use IEEE double precision when requested to do so.

Actually, the 80387 and the '87 FPU in all other IA-32 processors
do use IEEE 745 double-precision arithmetic when requested to do so.
The problem is that GCC doesn't request that it do so.  It's a long
standing problem with GCC that will probably never be fixed.  You can
work around this problem the way the Microsoft C/C++ compiler does
by requesting that the FPU always use double-precision arithmetic.
That way your answers are only wrong when you use long double or float.

				Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge at csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  


From exarkun at divmod.com  Tue May  6 09:18:55 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 6 May 2008 09:18:55 -0400
Subject: select.poll() and WSAPoll
In-Reply-To: <hgYTj.71478$vr3.27597@bignews2.bellsouth.net>
Message-ID: <20080506131855.6859.931241377.divmod.quotient.59525@ohm>

On Tue, 6 May 2008 08:36:28 -0400, inhahe <inhahe at gmail.com> wrote:
>select.poll isn't supported on Windows, because Windows doesn't have such a
>feature, or at least it didn't until Vista.  Vista implements the same thing
>but called  WSAPoll, an article is here
>http://blogs.msdn.com/wndp/archive/2006/10/26/WSAPoll.aspx
>I hope that the next edition of Python supports select.poll on Vista, or at
>least that someone writes a third-party module fo it. As much as I'd love to
>do it myself, it's probably beyond me.. i've never used poll before nor
>written a Python extension.  also, i don't have Vista.
>Thanks
>

If you use Twisted, then you can use I/O Completion Ports, which are even
better than WSAPoll, and your code will also work with KQueue on BSD or
EPoll on Linux without any changes. :)

Jean-Paul


From deets at nospam.web.de  Fri May 30 16:04:15 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 May 2008 22:04:15 +0200
Subject: accumulator generators
In-Reply-To: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <6ab4u7F35bmisU1@mid.uni-berlin.de>

Cameron schrieb:
> I was reading this <a href="this http://www.paulgraham.com/icad.html">Paul
> Graham article</a> and he builds an accumuator generator function in
> the appendix. His looks like this:
> 
> <pre>
> def foo(n):
>   s = [n]
>   def bar(i):
>     s[0] += i
>     return s[0]
>   return bar
> </pre>
> 
> Why does that work, but not this:
> 
> <pre>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar
> </pre>

Because python's static analysis infers s as being a variable local to 
bar in the second case - so you can't modify it in the outer scope.

In the future, you may declare

def bar(i):
     nonlocal s
     ...


Diez


From pecora at anvil.nrl.navy.mil  Mon May 12 11:38:19 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 12 May 2008 11:38:19 -0400
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <pecora-B34BA2.11381912052008@ra.nrl.navy.mil>

In article 
<f6743b81-9324-46dd-bbd3-ef8812e28197 at d77g2000hsb.googlegroups.com>,
 wxPythoner at gmail.com wrote:

> I am stunned that this simple misunderstanding of mine ended in a
> mathematical clash of a sort. :)  You guys really blew me away wih
> your mathematical knowledge. And also the 0**0 is a thing I've never
> thought about trying, until now that is. If the mathematical rule is
> that EVERYTHING raised to the power of 0 is 1, then we should accept
> that, even in the case of 0**0. This is just the way it is.

Well, it's really not that simple.  You've seen that 0**0 can lead to 
problems in various areas of mathematics (check the Wikipedia article on 
analysis/calculus application vs. combinatorics and discrete math).  You 
have to be aware of those dangers, what the language (Python here), and 
what your application requires.  Consistency in mathematics is vital.  
If you are using 0**0=1, then your code should be consistent with that 
usage.

-- 
-- Lou Pecora


From lew at lewscanon.com  Fri May  9 01:45:04 2008
From: lew at lewscanon.com (Lew)
Date: Fri, 09 May 2008 01:45:04 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <68i6b5F2soauaU1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <fISdnYstu5R9eb7VnZ2dnUVZ_o_inZ2d@comcast.com>

Waylen Gumbal wrote:
> Not everyone follows language-neutral groups (such as comp,programming 
> as you pointed out), so you actually reach more people by cross posting. 
> This is what I don't understand - everyone seems to assume that by cross 
> posting, one intends on start a "flamefest", when in fact most such 
> "flamefests" are started by those who cannot bring themselves to 
> skipping over the topic that they so dislike.

It's not an assumption in Xah Lee's case.  He spams newsgroups irregularly 
with rehashed essays from years ago, and a number of people are just tired of 
him.  Don't blame the victims for the perpetrator's actions, OK?

-- 
Lew


From george.sakkis at gmail.com  Fri May  2 01:50:21 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 1 May 2008 22:50:21 -0700 (PDT)
Subject: help with list comprehension
References: <WtvSj.108013$Cj7.100899@pd7urf2no>
	<x8wSj.12844$GE1.4900@nlpi061.nbdc.sbc.com>
Message-ID: <dbbc4ee4-1efd-4c2e-90dd-fac1f6ee9f1f@b64g2000hsa.googlegroups.com>

On May 1, 11:46?pm, Carsten Haese <carsten.ha... at gmail.com> wrote:
> Yves Dorfsman wrote:
>
> > In the following script, m1() and m2() work fine. I am assuming m2() is
> > faster although I haven't checked that (loops through the list twice
> > instead of once).
>
> Well, let's check it:
>
> $ python -m timeit -s "import x" "x.m1()"
> 100000 loops, best of 3: 6.43 usec per loop
>
> $ python -m timeit -s "import x" "x.m2()"
> 100000 loops, best of 3: 8.34 usec per loop
>
> As it turns out, m1 is faster than m2. The reason is that list
> comprehensions do the loop in C, whereas the for-append pattern does the
> loop on the Python level.
>
>
>
> > Now what I am trying to do is something like m3(). As currently written
> > it does not work, and I have tried different ways, but I haven't managed
> > to make it work.
>
> > Is there a possibility ? Or is m2() the optimum ?
>
> > [...]
> > def m1():
> > ? colours = [ e['colour'] for e in l ]
> > ? nums ? ?= [ e['num'] ? ?for e in l ]
>
> > def m2():
> > ? colours = []
> > ? nums ? ?= []
> > ? for e in l:
> > ? ? colours.append(e['colour'])
> > ? ? nums.append(e['num'])
>
> > #def m3():
> > # ?colours, nums = [ e['colour'], e['num'] for e in l ]
>
> m3 doesn't work because you're building a list of 10 color/number pairs
> that you're trying to unpack that into just two names. The working
> "derivative" of m3 is m1, which is the most natural, fastest and
> clearest solution to your problem.

Another alternative is:

from operator import itemgetter

def m3():
    colours, nums = zip(*map(itemgetter('colour','num'), l))

It's slower than m1() but faster than m2(); it's also the most
concise, especially if you extract more than two keys.

George


From duncan.booth at invalid.invalid  Mon May 12 03:20:48 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 May 2008 07:20:48 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga> <m2ej884uau.fsf@googlemail.com>
	<7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com>
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<Xns9A9BD4DD2720duncanbooth@127.0.0.1>
	<WqIVj.32521$KJ1.6884@newsfe19.lga>
Message-ID: <Xns9A9C543323E50duncanbooth@127.0.0.1>

bc90021 <python at bc90021.net> wrote:

> On Sun, 11 May 2008 19:55:31 +0000, Duncan Booth wrote:
> 
>> 7stud <bbxx789_05ss at yahoo.com> wrote:
>> 
>> 
>>> ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? tempfileName =
>>> "\"proctemp\\" ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? +
>>> self.matrix[c][0] + "_other.txt\""
>> 
>> It wouldn't exactly result in either of the error messages you
>> posted, but I expect the spurious quote marks round the filename will
>> be giving you problems.
>> 
>> Surely you want the filename to be something like
>> 'proctemp\fred_other.txt' rather than '"proctemp\fred_other.txt"'
>> with the spurious double quotes?
> 
> Yup, that's what it was.  I figured it out two seconds before this
> post.  However, it will be interesting to see how it handles files
> with spaces in the name...
> 
It will handle spaces just fine.

You need to try and understand the difference between passing arguments to 
a program, where the shell will try to parse the command line into separate 
arguments so spaces have to be escaped somehow, and calling a function 
within a program where no such parsing takes place.


From dfnsonfsduifb at gmx.de  Sat May 24 07:14:59 2008
From: dfnsonfsduifb at gmx.de (Johannes Bauer)
Date: Sat, 24 May 2008 13:14:59 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <4837ba88_1@news.tm.net.my>
References: <esujg5x5u5.ln2@joeserver.homelan.net> <4837ba88_1@news.tm.net.my>
Message-ID: <ju9lg5xvm8.ln2@joeserver.homelan.net>

TheSaint schrieb:
> On 06:59, sabato 24 maggio 2008 Johannes Bauer wrote:
> 
>> However, this "assignment and comparison" is not working. What's the
>> "Python way" of doing this kind of thing?
> 
> If you want speak a language that isn't understood mostly you'll face
> unexpected risults.
> When you got started with C/C++, were you writing plain english to do
> programs?
> Far away to be a flame, each language have its own grammar that some time it
> will need to be learnt.
> Therefore, even myself still bad to write english, since my mind thinking
> italian sentences.

Well, I do not really see your point - of couse I'm aware (and admitted) 
that my Python skills are extremely amateurish. That's why I'm asking 
for help here...

Regards,
Johannes

-- 
"Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
reicht zu wissen, da? andere es besser k?nnen und andere es auch
besser machen um einen Vergleich zu bringen."     -     Wolfgang Gerber
       in de.sci.electronics <47fa8447$0$11545$9b622d9e at news.freenet.de>


From bruno.desthuilliers at gmail.com  Wed May 14 16:57:35 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:57:35 -0700 (PDT)
Subject: HASH TABLES IN PYTHON
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com> 
	<mailman.1123.1210782193.12834.python-list@python.org>
Message-ID: <170579bd-bfa2-4330-90c3-7c39446943bf@k37g2000hsf.googlegroups.com>

On 14 mai, 18:23, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
wrote:
> On Wed, May 14, 2008 at 12:20 PM, Blubaugh, David A.
>
> <dbluba... at belcan.com> wrote:
> > To Whom It May Concern,
>
> > I was wondering if anyone has ever worked with hash tables within the Python
> > Programming language?

I wonder if anyone could do anything in Python *without* using hash
tables. <g>


From s0suk3 at gmail.com  Tue May 20 12:49:39 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 09:49:39 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1> 
	<720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>
Message-ID: <a72ad0fc-8662-4f2f-aa45-cb4e57fa99f8@z72g2000hsb.googlegroups.com>

On May 20, 9:04 am, castironpi <castiro... at gmail.com> wrote:
> On May 20, 5:04 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>
>
> > John Salerno <johnj... at NOSPAMgmail.com> wrote:
> > >>>> a = 'this is longer'
> > >>>> b = 'this is longer'
> > >>>> a == b
> > > True
> > >>>> a is b
> > > False
>
> > > In the above example, Python has created only one string called
> > > 'hello' and both x and y reference it. However, 'this is longer' is
> > > two completely different objects.
>
> > That is true when run interactively, but the behaviour changes again if you
> > run it as a script:
>
> > C:\Temp>type t.py
> > a = 'this is longer'
> > b = 'this is longer'
> > print a is b
>
> > C:\Temp>t
> > True
>
> > In short, two equal strings may or may not be identical and any code which
> > makes assumptions based on observed behaviour is broken. If you want to be
> > able to test identity on strings safely then use the 'intern()' builtin to
> > get repeatable behaviour.
>
> > --
> > Duncan Boothhttp://kupuguy.blogspot.com
>
> There is no such thing as real true equals.

That's quite some dark deep philosophy. Fortunately, computers are not
as complicated as real life. I would argue that, programatically,
there *is* such thing as "real true equals". I would also argue that
that view is most certainly not shared by everyone.


From martin at v.loewis.de  Thu May  1 14:06:04 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 20:06:04 +0200
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <481a068c$0$9757$9b622d9e@news.freenet.de>

> I haven't figured out a way to do this but see no reason why it cannot be
> done.  I have a decent size application written in 100% Python.  I would
> like to distribute this application, but only the .pyc files.  Since the
> .pyc's are just the compiled sources I figured it would work, but if I copy
> just the pyc's and my main app's py into a directory by themselves, I'm
> unable to execute.  Why is this?

This should work fine. What precisely are you doing to execute it, and
how precisely does it fail?

> At this point I'm not really keen on
> handing out the source files to my application, it feels unprofessional.

I don't consider it unprofessional. If the software is packaged that
the end user readily notices the difference - that's unprofessional.
IOW, unless the user browsers your app's directory, he shouldn't even
have to know that the application is written in Python.

Regards,
Martin


From michels at mps.mpg.de  Thu May  8 03:33:31 2008
From: michels at mps.mpg.de (michels at mps.mpg.de)
Date: Thu, 8 May 2008 00:33:31 -0700 (PDT)
Subject: DISLIN 9.3 stuck
References: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>
	<48214644$0$11610$3b214f66@aconews.univie.ac.at>
	<cda9b76c-d9e3-4f55-990d-586a5b8b6708@s50g2000hsb.googlegroups.com>
Message-ID: <4d849bee-c9d5-4f18-91a4-9120df5be3ca@a1g2000hsb.googlegroups.com>

On 8 Mai, 02:55, adolfo <aguirre.ado... at gmail.com> wrote:

> ...
> 1- The strange thing is that I went to thedislindirectory in the C:
> drive and there was no disli.pyd file anywhere. I found the file in
> the My Documents subdirectory where I had originally unzipped thedislinarchived files I downloaded and from where I run the setup.
>

The name of the Dislin module for Python 2.5 is dislin.pyd, not
disli.pyd. It's
copied by the setup program to the directory c:\dislin\python if you
have choosed
the default installation directory c:\dislin.

> > you should set environment variableDISLINtoo
> > (see python.inf, which you can find in thedislin-distribution)
>
> 2 - Well I have followed theDISLIN9.3 inf file for Python 2.5.2 for
> Windows. It contains commands for a unix command line "unzip -o
> dl_93_py.zip setup first and then... " and then:
>
> " Windows 98/ME
>
>         Add the following commands to the autoexec.bat file
>
>         PATH=c:\dislin\win;%PATH%
>         SETDISLIN=c:\dislin
>         SET PYTHONPATH=c:\dislin\python
>
>      Windows NT/2000/XP/Vista
>
>         The environment variables can be set or modified with the
>         Control Panel
>         (see -> Control Panel -> System -> Advanced -> Environment
>         Variables)."
>
>  *** I have followed all these directions butDISLINstill does not
> shop up as a module when making the Python calls.
>

The environment variable for Python is PYTHONPATH without any blanks.
You can check
the variable with the command 'echo %PYTHONPATH%' at a command prompt.


Regards,

Helmut


From eduardo.padoan at gmail.com  Wed May 14 12:23:02 2008
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Wed, 14 May 2008 13:23:02 -0300
Subject: HASH TABLES IN PYTHON
In-Reply-To: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
References: <27CC3060AF71DA40A5DC85F7D5B70F3803845510@AWMAIL04.belcan.com>
Message-ID: <dea92f560805140923l24669cfft4de2d715c101c2c1@mail.gmail.com>

On Wed, May 14, 2008 at 12:20 PM, Blubaugh, David A.
<dblubaugh at belcan.com> wrote:
> To Whom It May Concern,
>
> I was wondering if anyone has ever worked with hash tables within the Python
> Programming language?  I will need to utilize this ability for quick
> numerical calculations.

http://docs.python.org/lib/typesmapping.html

> Thank You,
>
> David Blubaugh
-- 
 Eduardo de Oliveira Padoan
http://www.advogato.org/person/eopadoan/
http://twitter.com/edcrypt
Bookmarks: http://del.icio.us/edcrypt


From spamtrap at dot-app.org  Thu May  8 11:08:35 2008
From: spamtrap at dot-app.org (Sherman Pendley)
Date: Thu, 08 May 2008 11:08:35 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
Message-ID: <m17ie4ltos.fsf@dot-app.org>

kodifik at eurogaran.com writes:

>> ? ? ? ? ?| ? PLEASE DO NOT ? | ? ? ? ? ? ?:.:\:\:/:/:.:
>> ? ? ? ? ?| ?FEED THE TROLLS ?| ? ? ? ? ? :=.' - ? - '.=:
>
> I don't think Xah is trolling here (contrary to his/her habit)
> but posing an interesting matter of discussion.

It might be interesting in the abstract, but any such discussion, when
cross-posted to multiple language groups on usenet, will inevitably
devolve into a flamewar as proponents of the various languages argue
about which language better expresses the ideas being talked about.
It's like a law of usenet or something.

If Xah wanted an interesting discussion, he could have posted this to
one language-neutral group such as comp.programming. He doesn't want
that - he wants the multi-group flamefest.

sherm--

-- 
My blog: http://shermspace.blogspot.com
Cocoa programming in Perl: http://camelbones.sourceforge.net


From maxerickson at gmail.com  Sun May  4 17:20:55 2008
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 4 May 2008 21:20:55 +0000 (UTC)
Subject: ISBN Barecode reader in Python?
References: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>
	<slrng1s6el.5oc.nick@irishsea.home.craig-wood.com>
Message-ID: <Xns9A94B07C4D804maxericksongmailcom@80.91.229.13>

Nick Craig-Wood <nick at craig-wood.com> wrote:

> Joseph <cephire at gmail.com> wrote:
>>  All: I have written a program to query Amazon with ISBN and get
>>  the book details. I would like to extend so that I can read
>>  ISBN from the barcode (I will take a photo of the same using
>>  webcam or mobile). Are there any opensource/free SDK doing the
>>  same? As it is a hobby project, I don't like to spend money on
>>  the SDK. 
> 
> Pick yourself up a cue-cat barcode reader, eg from here or ebay
> 
>   http://www.librarything.com/cuecat
> 
> These appear as a keyboard and "type" the barcode in to your
> program. 
> 
> Cheap and effective.
> 

The killer application for ISBN lookup on Amazon is checking prices 
while in the bookstore. Being able to email a photo from your phone  
and then getting an email with the Amazon price in response would be 
way easier than typing the isbn into Google or whatever.


max



From castironpi at gmail.com  Thu May 15 22:22:25 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 19:22:25 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>
	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com> 
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com> 
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com> 
	<a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>
Message-ID: <054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>

On May 15, 7:16?pm, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:43?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 15, 6:16?pm, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 15, 4:28?pm, "bruno.desthuilli... at gmail.com"
>
> > > <bruno.desthuilli... at gmail.com> wrote:
> > > > On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>
> > > > > On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>
> > > > > > On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > > > > > > Why can't I write this?
> > > > > > > --
>
> > > > > > Because your antecedent is undefined?
>
> > > > > Of the two ways to play, just to say #define this per se would be a
> > > > > bad move, but that's one that comes from the wrong group. ?#define is
> > > > > a big scary macro, that python hasn't been using; it's the one-line
> > > > > typo. ?Instance:
>
> > > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > > > Use it to render planes in solids.
>
> > > > > Back about 'this', I honestly hadn't remembered 'til this time, when I
> > > > > got a chance to reread the subject. ?Plus I keep ditching my radio.
>
> > > > Jesus H. Christ. This really sounds like my mother in law. Scary,
> > > > definitively.- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > Definitely. ?But, due, I forgot to complete an example.
>
> > > > > #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>
> > > in C. ?Python:
>
> > > life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
> > > exec( life1 )
>
> > > Where does it go?- Hide quoted text -
>
> > > - Show quoted text -
>
> > I'm supposed to talk about an entropy pool game. ?You can tunnel.- Hide quoted text -
>
> > - Show quoted text -
>
> If I had a send-parachute, would all you need be yield? ?Let's drop
> graphics.- Hide quoted text -
>
> - Show quoted text -

My character is studying chord progressions.  I have right angles.
I'm on a laptop, and talking in the car is fine.


From hackingkk at gmail.com  Thu May  8 08:13:44 2008
From: hackingkk at gmail.com (Krishnakant Mane)
Date: Thu, 8 May 2008 17:43:44 +0530
Subject: Newbie to python --- why should i learn !
In-Reply-To: <BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<BAY144-W7ACD4ED16A7E6FD08BD478FD00@phx.gbl>
Message-ID: <8d3752f20805080513i12fd3384k23e9866767c33752@mail.gmail.com>

hello,
I have programmed co insidentally in all the 3 languages.
so out of my experience of 10 + years, I got my personal share of
reasons to prefer python over the other 2 namely c++ and java.
firstly as every one has already explained, python is easy, fun to
learn and can do many things much productively for programmers
compared to c++ and java.
and c# is no better in that.
besides, now a days python has become much much faster in some cases
faster than java.
compare pygtk vs java swing.
python has huge amount of libraries/ modules which are as easy to use
as the language itself.
the syntax difference mentioned in the first email on this thread
makes a huge difference when the code becomes complex and the number
of lines increase.
so there are a lot of reasons to prefer python over java.
for the question "what can I do in python easier than other languages
" is not a question to be answered because it all depends on how one
associates the problem space with the language space in which the
programmer wishes to express the solution.
there will be people who will say "java is much better choice for
large scale programmes " but people like myself will always question
that.
happy hacking.
Krishnakant.


From jcd at sdf.lonestar.org  Fri May  9 10:14:01 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 10:14:01 -0400
Subject: observer pattern  (notification chain synchronization)
In-Reply-To: <tFYUj.138$5Y1.88@trnddc04>
References: <JqEUj.52492$Bb3.45491@trnddc01>  <tFYUj.138$5Y1.88@trnddc04>
Message-ID: <1210342441.3332.19.camel@aalcdl07.lib.unc.edu>

That looks like a good approach to me.  Alternative to a dict would just
be a count of reported stocks tested against the total number of stocks,
but if one stock reports twice before another reports at all, you'll get
funny results.  Your method is probably better, in the general case.

Cheers,
Cliff


On Fri, 2008-05-09 at 13:51 +0000, Alan Isaac wrote:
> A question related to the observer pattern...
> 
> Suppose I have a variant: there are stocks, mutual funds, and investors.  Let us say that funds are observers for multiple stocks, and investors are observers for funds.  Once a "month" all stocks notify their observing funds of their end-of-month price, and *then* all fund to notify their observing investors of their end-of-month investment value. 
> 
> What is a good way to enforce this timing?  (I.e., a fund should not notify an its investors until all stocks have reported.)
> 
> Here is one way:
> 
> - for each fund, create a ``reportreceived`` dict that maps stocks to booleans (initially False)
> - as each stock notifies its funds, the fund changes False to True and checks ``all(reportreceived.values())`` to determine whether it is ok to notify investors.
> - When it is ok, the fund notifies investors and resets all the ``reportreceived`` values. 
> 
> Is this sensible enough? What are standard and better ways?
> 
> Thank you, 
> Alan Isaac 
> 
> PS I am drawing on the description of the observer pattern at
> <URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>
> The real world aspects are just to add some concreteness.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



From gerard.blais at gmail.com  Mon May 12 09:50:49 2008
From: gerard.blais at gmail.com (Gerry)
Date: Mon, 12 May 2008 06:50:49 -0700 (PDT)
Subject: artificiall, agent, movement
References: <94c853a6-decd-4524-b549-4f8245f36736@y18g2000pre.googlegroups.com>
Message-ID: <4d3eba3d-80bc-4cb4-a2ef-abf1827f9cfd@24g2000hsh.googlegroups.com>

Many city travel surveys collect source destination trip-start data;
you might be able to find one of these studies.

I think each car in your simulation should have a destination.  Then
the simulation needs a route-finder, and cars can progress along their
routes as traffic permits -- or even change routes if traffic seems
too slow.

I think if you start with a very small city -- perhaps just a 5 by 5
grid, and generate sources and destinations at intersections randomly
along the perimeter, you'll have enough to prototype all of the
building blocks.

Gerry


On May 12, 6:37 am, Iman <iman.dar... at gmail.com> wrote:
> hi
> i'm working on some simulation project . i'm going to simulate traffic
> of a city.
> this simulation has cars , passengers , non-movable objects and
> Traffic signals  .
> i've made cars as intelligent agent . it has thinking method ,
> changing states agents ...
> the main problem is i have problem to move my agents in world .
> it would be possible to add some method to agent which move  agent in
> random  destination .
> but i'm trying to find some patterns which is designed  for this
> problems .
> is there any sample source code in python or links, docs to help me ?
>  thanks for your attention .



From johnjsal at NOSPAMgmail.com  Wed May 14 22:01:26 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:01:26 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
	<mailman.1124.1210784308.12834.python-list@python.org>
Message-ID: <20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>

On Wed, 14 May 2008 12:58:12 -0400
"Terry Reedy" <tjreedy at udel.edu> wrote:

> 
> "Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
> news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
> | I also recommend Gmane which provides a free news server for most mailing
> | lists: mailing lists are a lot more manageable when gatewayed into a news
> | server. If you just want to access comp.lang.python I think you'll find 
> the
> | mailing list to which it is connected is available for free on Gmane.
> 
> gmane.comp.python.general
> 
> which is where I am answering this from.  Works great. 

So that's the same as c.l.p.?


From jkugler at bigfoot.com  Fri May 30 19:44:38 2008
From: jkugler at bigfoot.com (Joshua Kugler)
Date: Fri, 30 May 2008 15:44:38 -0800
Subject: How to covert ASCII to integer in Python?
References: <5C5D68208EBBFD40A9DD9A194E957CCC2798EE@aust-mail.emsaus.com>
Message-ID: <g1q3h6$9n1$1@ger.gmane.org>

Skonieczny, Chris wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here:
> http://mail.python.org/pipermail/python-list/2007-February/427841.html
>  
> It is not true - eg. try :
> a='P'            # P is ASCII , isn't it ?
> b=int(a)
> and what you will get ? An error !!!
>  
> Or probably you yourself should - quote :
> "You probably should go through the tutorial ASAP that is located here:
> 
> http://docs.python.org/tut/ "

int() converts a strings that is a valid intenter.  What you're looking for
is ord().

In [1]: ord('d')
Out[1]: 100

In [2]: a='P'

In [3]: b=ord(a)

In [4]: b
Out[4]: 80

j



From kyosohma at gmail.com  Tue May 13 13:47:29 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Tue, 13 May 2008 10:47:29 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <141821a0-46f7-4e78-b070-7a44ffa4b4e8@26g2000hsk.googlegroups.com>

On May 13, 12:10?pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight the usage of Python in
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Take a look at http://python.org/

It lists various companies that use Python. There's also Sourceforge,
which you can use to list a lot of projects made with Python.
Spambayes and bittorrent are a couple of the more "famous" ones.

Mike


From deets at nospam.web.de  Wed May  7 11:25:03 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 May 2008 17:25:03 +0200
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
Message-ID: <68dvvdF2sv59dU1@mid.uni-berlin.de>

> Now to the main point. When a generator function is run, it immediately
> returns a generator, and it does not run any code inside the generator.
> Not until generator.next() is called is any code inside the generator
> executed, giving it traditional lazy evaluation semantics. Why don't
> generators follow the usual eager evaluation semantics of Python and
> immediately execute up until right before the first yield instead?
> Giving generators special case semantics for no good reason is a really
> bad idea, so I'm very curious if there is a good reason for it being
> this way. With the current semantics it means that errors can pop up at
> unexpected times rather than the code failing fast.

The semantics of a generator are very clear: on .next(), run until the next
yield is reached and then return the yielded value. Plus of course the
dealing with StopIteration-stuff.

Your scenario would introduce a special-case for the first run, making it
necessary to keep additional state around (possibly introducing GC-issues
on the way), just for the sake of it. And violate the lazyness a generator
is all about. Think of a situation like this:

def g():
    while True:
       yield time.time()

Obviously you want to yield the time at the moment of .next() being called.
Not something stored from ages ago. If anything that setups the generator
shall be done immediatly, it's easy enough:

def g():
   first_result = time.time()
   def _g():
      yield first_result
      while True:
         yield time.time()
   return _()

Diez


From deets at nospam.web.de  Tue May  6 10:07:39 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 May 2008 16:07:39 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <68b726F2s5g09U1@mid.uni-berlin.de>

jmDesktop wrote:

> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct? 

Yes.

> Is my schooling for nought on these OOP concepts if I 
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

No. There has been a discussion of interfaces and their value/reason for
existance recently:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/95e99a5dae495209/647693537ef98068?lnk=raot

Besides, at least for java (didn't do much in C#) you sure will miss on
generators, metaclasses, multiple inheritance, higher-order functions and
such if going there from python. Which I personally consider a much greater
loss and annoyance than a crutch needed in statically typed languages.

Diez


From timr at probo.com  Sun May 11 18:32:05 2008
From: timr at probo.com (Tim Roberts)
Date: Sun, 11 May 2008 22:32:05 GMT
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com><200805081914.06459.kyrie@uh.cu><mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
Message-ID: <hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>

wxPythoner at gmail.com wrote:
>
>I am stunned that this simple misunderstanding of mine ended in a
>mathematical clash of a sort. :)  You guys really blew me away wih
>your mathematical knowledge. And also the 0**0 is a thing I've never
>thought about trying, until now that is. If the mathematical rule is
>that EVERYTHING raised to the power of 0 is 1, then we should accept
>that, even in the case of 0**0. This is just the way it is.

Sure, but it's ALSO the mathematical rule that 0 raised to any power is 0.
Thus, there are multiple solutions to this problem, meaning that there is
NO solution to the problem.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From sturlamolden at yahoo.no  Tue May 20 12:50:35 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Tue, 20 May 2008 09:50:35 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <ff09a0e3-84ee-49c8-9ccd-5af46988b0fd@a70g2000hsh.googlegroups.com>

On May 19, 8:07 pm, Vicent Giner <vgi... at gmail.com> wrote:

> By the way, is it possible (and easy) to call a C function from a
> Python program??

Yes it is. You can e.g. use ctypes for that.




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 06:16:59 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 12:16:59 +0200
Subject: Classmethods are evil
In-Reply-To: <g0u518$1fec$4@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>	<mailman.1267.1211002421.12834.python-list@python.org>	<g0m9or$2qk0$1@news.mtu.ru>	<10393839-0a29-4233-8ff2-fab9c7c92a75@i76g2000hsf.googlegroups.com>
	<g0u518$1fec$4@news.mtu.ru>
Message-ID: <4832a515$0$5413$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> On Mon, 19 May 2008 13:53:31 -0700, bruno.desthuilliers at gmail.com wrote:
> 
>> On 17 mai, 11:50, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>(snip)
>>> How did I come to this:http://code.djangoproject.com/changeset/7098
>>>
>>> I measured this and there was a marginal speed increase when
>>> classmethods wher moved to metaclass.
>> IIRC (please correct me if I'm wrong), this part of code is only called
>> when the class is created - in which case it makes sense to move it
>> where it belongs, ie to the metaclass. This is by no mean a use case for
>> classmethods.
> 
> Yes, this is not the use case for class methods, but they where used 
> there. 

Don't blame the tool for being misused.

> The whole point of my post was to say that classmethods are used 
> in a wrong way too often

I think it's the first time I see such a misuse of classmethods, and I 
have read quite a lot of (sometimes pretty hairy) Python code.

>  and most of Python programmers don't know that 
> the same thing can be implemented with metaclass methods.

I'd say that most Python programmers using metaclasses know when to use 
a metaclass method and when to use a classmethod. One case of (slight) 
misuse is certainly not enough to infer a general rule, and that doesn't 
make classmethods bad in anyway. And while we're at it, I'd consider 
using a custom metaclass only to implement the equivalent of a 
classmethod a misuse too - and in this case, kind of a WTF.

As a last point, there's at least one very big difference between a 
metaclass method and a classmethod, which is that you cannot call a 
metaclass method on an instance:

class MyMeta(type):
     def bar(cls):
         print "%s.bar()" % cls

class Foo(object):
     __metaclass__ = MyMeta

     @classmethod
     def baaz(cls):
         print "%s.baaz()" % cls

Foo.baaz()
Foo.bar()

f = Foo()
f.baaz()
f.bar()

=>

<class '__main__.Foo'>.baaz()
<class '__main__.Foo'>.bar()
<class '__main__.Foo'>.baaz()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/tmp/python-18506gCT.py", line 17, in <module>
     f.bar()
AttributeError: 'Foo' object has no attribute 'bar'

I've had use case where I needed to call classmethods on instances, 
using a metaclass method would have required an explicit call, ie 
type(obj).some_method() instead of obj.some_method(), which would have 
uselessly exposed this knowledge to client code.





From castironpi at gmail.com  Wed May 14 18:34:17 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 15:34:17 -0700 (PDT)
Subject: Using file objects with elementtree
References: <5dca8f2f-ba08-4cf6-9d45-da2b2e532af8@x35g2000hsb.googlegroups.com>
Message-ID: <8fa65ead-a840-4f73-a11b-85b1eec9fc03@m73g2000hsh.googlegroups.com>

On May 14, 3:09?pm, dj <d.a.aberna... at gmail.com> wrote:
> Hello,
>
> Rather then holding my XML document in memory before writing it to
> disk, I want to create a file object that elementtree will write each
> element to has it is created. Does any one know how to do that ?
>
> Here is my code so, far:
>
> fd = open("page.xml", "w")
> tree.write( fd, encoding="iso-8859-1")
>
> I know there's something I am doing wrong, but I just do not know
> what.

Sure.  Relational databases are more widely useful.  They're the
binary hold-on-disk for you-- a big XML file.


From wuwei23 at gmail.com  Wed May 21 22:44:33 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:44:33 -0700 (PDT)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
	<g0b5lc$5jm$2@worf.visyn.net>
	<aca72543-a59f-4eb0-9ce0-929860e7226a@l17g2000pri.googlegroups.com>
	<c288375a-9935-45f6-b7d9-56a1316e96f0@w5g2000prd.googlegroups.com> 
	<6c89401d-992c-44a2-b650-f28b2d2d537f@f24g2000prh.googlegroups.com>
Message-ID: <376c8fd3-2e05-4efe-ab96-bef4f5cd6022@s21g2000prm.googlegroups.com>

On May 22, 2:28 am, Xah <xah... at gmail.com> wrote:
> ?No, what was generally rejected was the idea that *you* could bring
> more clarity to the documentation, based on the complete absence of it
> in your posts & "essays". Basically, noone wanted docs that would
> randomly degenerate into ad hominem accusations of elitism aimed at
> the module authors.?
>
> Dear Alex moron number 23,

Thank you for illustrating my point perfectly.


From castironpi at gmail.com  Thu May 15 10:40:17 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:40:17 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<mailman.1165.1210861589.12834.python-list@python.org>
Message-ID: <60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>

On May 15, 9:26?am, "Dan Upton" <up... at virginia.edu> wrote:
> On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
> > Why can't I write this?
> > --
>
> Because your antecedent is undefined?

Of the two ways to play, just to say #define this per se would be a
bad move, but that's one that comes from the wrong group.  #define is
a big scary macro, that python hasn't been using; it's the one-line
typo.  Instance:

#define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )

Use it to render planes in solids.

Back about 'this', I honestly hadn't remembered 'til this time, when I
got a chance to reread the subject.  Plus I keep ditching my radio.

--


From jbarciela at gmail.com  Mon May  5 14:04:08 2008
From: jbarciela at gmail.com (jbarciela at gmail.com)
Date: Mon, 5 May 2008 11:04:08 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
Message-ID: <070fc7e3-3e51-40b2-a6f2-026d00f8fa2f@m73g2000hsh.googlegroups.com>

John, you are the man

> during my search for perfection, I found Qooxdoo (http://qooxdoo.org/).
>
> ...
>
> I found QxTransformer (http://sites.google.com/a/qxtransformer.org/qxtransformer/Home) which is a
> XSLT toolkit that creats XML code that invoke qooxdoo.

Qooxdoo is indeed really impressive. But I read that YAHOO will serve
the javascript files for you from their CDN when you use YUI, for
free, and that's no peanuts, so I wonder, did you find anything at all
like that that could be used with YUI?

I have evaluated XForms, Laszlo, Flex, ZK, ... but I have to say
QxTransformer is the cleverest solution I have found so far (thanks to
you). I love it.


> I want Pythoncard.

I feel with you

Thanks!
Jaime


From mrmakent at cox.net  Fri May  2 10:44:44 2008
From: mrmakent at cox.net (Mike Kent)
Date: Fri, 2 May 2008 07:44:44 -0700 (PDT)
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
	<ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>
Message-ID: <fc9a94de-4cca-46d2-a502-92b11bdf6c9e@m36g2000hse.googlegroups.com>

On May 2, 9:47 am, Jetus <stevegi... at gmail.com> wrote:

> Hello Marc;
> Thanks for the input! I am worried about the comma in the "" data
> items, how do I tell Python to look for the "" data first, then use
> the comma separator?

Marc has already given you the correct answer.  You really should read
up on the csv module.


From alex.m.gusarov at gmail.com  Mon May 26 05:55:52 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 16:55:52 +0700
Subject: finding icons for Apps
In-Reply-To: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
References: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
Message-ID: <ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>

On Sun, May 25, 2008 at 3:41 PM, Dutton, Sam <Sam.Dutton at itn.co.uk> wrote:

>   http://tango.freedesktop.org/
>
> ...as used by OpenOffice, Gimp, Pidgin (Gaim), etc.
>
> However, if you only need a few basics (Save, Print, etc.) just use
> the 'standard' for the platform. Whatever you do, don't mix different styles
> of icon.
>
> Note that for Windows the application icon (the thing you see on the
> Desktop or in a folder) is done as an .ico file, which has multiple sizes in
> the same file. You'll need to create this in an editor such as Visual
> Studio.
>

With PyQt4 I can use even .SVG icons on all platforms ;) (and tango includes
svg version for all icons)
And please, Visual Studio as an icon editor..

Best regards,
Alex Gusarov
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From rocco.rossi at gmail.com  Fri May 16 11:32:48 2008
From: rocco.rossi at gmail.com (rocco.rossi at gmail.com)
Date: Fri, 16 May 2008 08:32:48 -0700 (PDT)
Subject: Variable by label
References: <aec6cdd8-3bde-4d68-ad93-d9ece9567886@b1g2000hsg.googlegroups.com>
	<_PgXj.4838$Kk3.4214@bignews9.bellsouth.net>
Message-ID: <9741f6ab-7a0f-4921-857f-24bd6753434a@t54g2000hsg.googlegroups.com>

On May 16, 4:27 pm, "inhahe" <inh... at gmail.com> wrote:
> >>> a = 1
> >>> b = eval("a")
> >>> b
> 1
> >>> a =1
> >>> b = globals()["a"]
> >>> b
> 1
> >>> a =1
> >>> b = locals()["a"]
> >>> b
>
> 1<rocco.ro... at gmail.com> wrote in message
>
> news:aec6cdd8-3bde-4d68-ad93-d9ece9567886 at b1g2000hsg.googlegroups.com...
>
> > Is there any function which will return a variable by passing to it
> > the string containing the variable's name? Something like this for
> > instance:
>
> > foo = some_function("foo")
>
> > or perhaps it's a dictionary. I don't know, but I would really like to
> > find out how it can be done. I guess it is achievable.
>
> > Thank you.

Perfect. Thank you all for your replies.


From johnjsal at NOSPAMgmail.com  Tue May 20 09:13:38 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 09:13:38 -0400
Subject: Misuse of list comprehensions?
Message-ID: <038e4418$0$27258$c3e8da3@news.astraweb.com>

I posted this code last night in response to another thread, and after I 
posted it I got to wondering if I had misused the list comprehension. Here's 
the two examples:

Example 1:
--------------------
def compress(s):
    new = []

    for c in s:
        if c not in new:
            new.append(c)
    return ''.join(new)
----------------------

Example 2:
------------------------
def compress(s):
    new = []
    [new.append(c) for c in s if c not in new]
    return ''.join(new)
--------------------------

In example 1, the intention to make an in-place change is explicit, and it's 
being used as everyone expects it to be used. In example 2, however, I began 
to think this might be an abuse of list comprehensions, because I'm not 
assigning the result to anything (nor am I even using the result in any 
way).

What does everyone think about this? Should list comprehensions be used this 
way, or should they only be used to actually create a new list that will 
then be assigned to a variable/returned/etc.? 




From daveparker at flamingthunder.com  Wed May 28 17:13:06 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:13:06 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
Message-ID: <dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>

On May 28, 12:09 pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> Following your posts in this thread, I see that
> you 'plan to add soon' every cool feature that every other language seems to
> have.

I've already added a lot of them.  For example, loops that don't need
looping variables:

For 1000 times do ...

Explicit infinite loops:

For forever do ...

I don't those are features that every other language seems to have,
not even Python.

Plus, by this weekend, built-in compiled fullscreen 3D graphics will
be in, too.

> With no certainty whatsoever that today's program will work on
> tomorrow's FT.

Kind of like how this year's program won't work on next year's
Python?  Except Flaming Thunder is faster. ;)


From mabbikeel at gmail.com  Sun May 18 17:31:20 2008
From: mabbikeel at gmail.com (Matt Porter)
Date: Sun, 18 May 2008 22:31:20 +0100
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<g0q05b$f3r$03$1@news.t-online.com>
Message-ID: <op.ubdcqiai4fd8pl@mp1206-hp.config>

On Sun, 18 May 2008 20:30:57 +0100, Peter Otten <__peter__ at web.de> wrote:

> Matt Porter wrote:
>
>> I'm trying to compress a string.
>> E.g:
>>   "AAAABBBC" -> "ABC"
>
> Two more:
>
>>>> from itertools import groupby
>>>> "".join(k for k, g in groupby("aaaaaabbbbbbbbbbcccccc"))
> 'abc'
>
>>>> import re
>>>> re.compile(r"(.)\1*").sub(r"\1", "aaaaaaabbbbcccccccc")
> 'abc'
>

Brilliant - I was trying to figure out how to do this with the re  
capabilities.

Thanks to everyone

> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
--



From vginer at gmail.com  Sat May 17 18:32:29 2008
From: vginer at gmail.com (Vicent Giner)
Date: Sat, 17 May 2008 15:32:29 -0700 (PDT)
Subject: Using Python for programming algorithms
Message-ID: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>

Hello.

I am new to Python. It seems a very interesting language to me. Its
simplicity is very attractive.

However, it is usually said that Python is not a compiled but
interpreted programming language ?I mean, it is not like C, in that
sense.

I am working on my PhD Thesis, which is about Operations Research,
heuristic algorithms, etc., and I am considering the possibility of
programming all my algorithms in Python.

The usual alternative is C, but I like Python more.

The main drawbacks I see to using Python are these:

* As far as I understand, the fact that Python is not a compiled
language makes it slower than C, when performing huge amounts of
computations within an algorithm or program.

* I don't know how likely it is to find libraries in Python related to
my research field.

* I know Python is a "serious" and mature programming language, of
course. But I do not know if it is seen as "just funny" in a research
context. Is Python considered as a good programming language for
implementing Operations Research algorithms, such as heuristics and
other soft-computing algorithms?

Maybe this is not the right forum, but maybe you can give me some
hints or tips...

Thank you in advance.


From wizzardx at gmail.com  Sun May  4 06:11:32 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 12:11:32 +0200
Subject: Open a file within an ISO in python.
In-Reply-To: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>
References: <8137a75f-f70d-4851-a5f1-3794a5bfad32@w8g2000prd.googlegroups.com>
Message-ID: <18c1e6480805040311w5828261egd90f0afae524c510@mail.gmail.com>

On Sun, May 4, 2008 at 12:01 PM,  <danikar at gmail.com> wrote:
> Is there a way to open a file that is inside of an ISO in python?
>
>  Say I have an ISO file, danikars.iso and on the iso there is a file
>  called information.txt
>
>  I want to be able to do something like this.
>
>  [code]
>  iso_h = openiso("danikars.iso")
>  file_h = iso_h.extract("information.txt")
>  contents = file_h.read()
>  [/code]
>
>  Is there anything that will give me that functionality? Or close?
>

Under Linux you can mount iso files as loopback devices.

eg:

mkdir mnt
sudo mount -o loop file.iso ./mnt

Then the ./mnt directory will 'contain' the contents of the iso


From skanemupp at yahoo.se  Thu May 15 12:29:36 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 09:29:36 -0700 (PDT)
Subject: file open/read/name etc, not working
References: <f0bc9bc2-768b-466e-9910-4c64d3cdd2cd@e53g2000hsa.googlegroups.com>
Message-ID: <2ba65e61-8b96-4516-b828-909c22adef66@m36g2000hse.googlegroups.com>

On 15 Maj, 18:12, globalrev <skanem... at yahoo.se> wrote:
> import os
>
> print os.path.exists('C:/Python25/myPrograms/netflix/test.txt')
> d=open('C:/Python25/myPrograms/netflix/flim.txt', 'r')
> d.readline()
>
> returns true in the shell but prints no text even though the document
> contains text.
>
> d.name returns nothing, d.name() raises an error.

wow im an idiot. print...


From inhahe at gmail.com  Fri May 23 06:12:25 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 06:12:25 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
Message-ID: <MKwZj.2749$772.668@bignews2.bellsouth.net>


"Nick Craig-Wood" <nick at craig-wood.com> wrote in message 
news:slrng3d2g4.3re.nick at irishsea.home.craig-wood.com...
> bukzor <workitharder at gmail.com> wrote:
>>  That does, in fact work. Thanks! I'm a little sad that there's no
>>  builtin way to do it, owell.
>>
>> >>> def f(a, *args):
>>  ...     print a
>>  ...     for b in args: print b
>>  ...
>> >>> import inspect
>> >>> a = [2,3]
>> >>> b = {'a':1}
>> >>> inspect.getargspec(f)
>>  (['a'], 'args', None, None)
>> >>> map(b.get, inspect.getargspec(f)[0])
>>  [1]
>> >>> map(b.get, inspect.getargspec(f)[0]) + a
>>  [1, 2, 3]
>> >>> f(*map(b.get, inspect.getargspec(f)[0]) + a)
>>  1
>>  2
>>  3
>
> If I saw that in my code I'd be wanting to get rid of it as soon as
> possible!
>
> I'd re-write f() to have all named arguments then the problem becomes
> easy and the answer pythonic (simple dictionary manipulation)...
>
> So instead of f(a, *args) have f(a, list_of_args).
>
> The f(*args) syntax is tempting to use for a function which takes a
> variable number of arguments, but I usually find myself re-writing it
> to take a list because of exactly these sort of problems.  In fact I'd
> be as bold to say that f(*args) is slightly un-pythonic and you should
> avoid as a user interface.  It does have its uses when writing
> polymorphic code though.
>


(I second that) the function should definitely be changed if possible.  it's 
hard to say what the real constraints of the problem are, so I just answered 
his question as if that's what he actually needed (assuming the length of 
the list and number of named arguments would be variable).

if we assume the constraints are that:
1.he has list, l
2.he has a dictionary, d
3.he wants the function to print the values in the dictionary according to a 
specific order of their keys as defined by the function, followed by the 
values of the list
then:

def f(d, l):
  order_of_keys = ['a']
  for key in order_of_keys:
    print d[key]
  for element in l:
    print element

#not tested





From ivo.talvet at gmail.com  Sun May 11 19:39:33 2008
From: ivo.talvet at gmail.com (ivo talvet)
Date: Mon, 12 May 2008 01:39:33 +0200
Subject: python without while and other "explosive" statements
Message-ID: <3dd0b1a30805111639n2d6db827v166104f28825a29c@mail.gmail.com>

Hello,

Is it possible to have a python which not handle the execution of
"while", "for", and other loop statements ? I would like to allow
remote execution of python on a public irc channel, so i'm looking for
techniques which would do so people won't be able to crash my computer
(while 1: os.fork(1)), or at least won't won't freeze my python in a
infinite loop, make it unresponsive. Is there a compiling option (or
better, something i can get with apt-get cos i think compiling myself
and handle all the metastuff myself is somehow dirty) for have a
"secure python" (you can guess what i mean by "secure" in my case) or
must i touch myself the source disable some code lines ? If last
solution, which modifications in which files should i do ? (sorry for
my bad english)

Thanks.

Ivo


From sturlamolden at yahoo.no  Wed May 21 13:56:10 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Wed, 21 May 2008 10:56:10 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
Message-ID: <a569e394-2409-487d-88b2-a8fb3c904cb1@p25g2000hsf.googlegroups.com>

On May 21, 11:38 am, boblat... at googlemail.com wrote:

> if (match = my_re1.match(line):
>   # use match
> elsif (match = my_re2.match(line)):
>   # use match
> elsif (match = my_re3.match(line))
>   # use match
>
> ...buy this is illegal in python.


Assignment expressions is disallowed in Python to protect against a
very common bug in C/C++ programs, the (accidental) confusion of

   if (match = my_re1.match(line))

with

   if (match == my_re1.match(line))

or vice versa.










From tjreedy at udel.edu  Wed May  7 15:15:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 7 May 2008 15:15:55 -0400
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
Message-ID: <fvsv59$8c1$1@ger.gmane.org>


<swapsun at gmail.com> wrote in message 
news:d61b9c56-6f9a-4b29-9247-4fce0b80ecbe at f63g2000hsf.googlegroups.com...
| Any idea why the following program does not work? I was learning IO on
| Python and the following generates a TypeError: range() integer end
| argument expected, got str.
| I am a beginner.
|
| ################################
| # print input name (str k), j times using raw_input
|
| def hello():
|    j=raw_input("Please type in the number of times you want to print
| ")
|    k=raw_input("Please type in your name ")
|    printname(j,k)
|
| def printname(j,k):
|          for i in range(j):
|                print ("Hello %s" % k)

For future debugging, use print to find out what values you actually have.
print j,k #before printname()
would have shown you that j is a string.
Also use the type() function as needed.
And do read the Lib Ref sections on builting functions and types.

tjr







From malaclypse2 at gmail.com  Mon May 12 12:27:32 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Mon, 12 May 2008 12:27:32 -0400
Subject: passing *args "recursively"
In-Reply-To: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
References: <eef8f8de-d9a5-4f3e-a24a-3632d46a52e9@e53g2000hsa.googlegroups.com>
Message-ID: <16651e80805120927u767479b5o83b6b69ae4430e13@mail.gmail.com>

On Mon, May 12, 2008 at 12:19 PM, Guillermo
<guillermo.listas at googlemail.com> wrote:
>  def func1(*args):
>     print args # (1, 2, 3)
>     func2(args)

change this line to:
    func2(*args)

-- 
Jerry


From mal at egenix.com  Wed May  7 05:24:48 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Wed, 07 May 2008 11:24:48 +0200
Subject: mxTexTools (Re: using sqlite3 - execute vs. executemany; committing
	...)
In-Reply-To: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
Message-ID: <48217560.9070707@egenix.com>

On 2008-05-07 00:07, Vlastimil Brom wrote:
> Thanks for reminding me about
> the mxTextTools; I looked at this package very quickly several months
> ago and it seemed quite
> complex and heavy-weight, but maybe I will reconsider this after some
> investigation ...

mxTextTools gives you almost full C speed while still being programmable
in Python and without a compiler.

It is a low level parsing engine. Here's talk I gave on mxTextTools
last year:

http://www.egenix.com/library/presentations/EuroPython2007-Parsing-Languages-with-mxTextTools/

If you're looking for ways to hide the complexity, you could try
SimpleParse (which uses mxTextTools for the parsing, but provides a
grammar based front-end).

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 07 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From cokofreedom at gmail.com  Tue May  6 04:38:29 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Tue, 6 May 2008 01:38:29 -0700 (PDT)
Subject: Newbie question - probably FAQ (but not exactly answered by 
	regular FAQ)
References: <mailman.496.1209807334.12834.python-list@python.org> 
	<slrng1ooto.avc.nick@irishsea.home.craig-wood.com>
	<482010d3$0$12566$426a74cc@news.free.fr> 
	<mailman.635.1210062200.12834.python-list@python.org>
Message-ID: <3fc840fa-cc5d-490c-b764-4b3c3e807880@56g2000hsm.googlegroups.com>

2.5 seems the defacto standard now for a new user, NB: probably not
the standard for the common business productions. However are you on
Windows or *nix? *nix may ship a certain version, so for ease of use
it would be best to use that.

Personally I use 2.5 because it is a complete version, and the latest
fully released giving me a lot of features to play with. But as
previously put if you are starting out, you are very unlikely to need
a huge amount of those features for a while.

So my opinion is used 2.5, it is released with no huge new feature
updates to come and won't break on random errors. (Unless you find a
real new one!). Also new is cool...


From tjreedy at udel.edu  Fri May  9 15:54:47 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 May 2008 15:54:47 -0400
Subject: RELEASED Python 2.6a3 and 3.0a5
References: <mailman.820.1210290618.12834.python-list@python.org><26dacfd7-e698-46c6-affb-7b4d6b18c3f5@59g2000hsb.googlegroups.com>
	<48241B01.8050009@cheimes.de>
Message-ID: <g02a64$k23$1@ger.gmane.org>


"Christian Heimes" <lists at cheimes.de> wrote in message 
news:48241B01.8050009 at cheimes.de...
| Kay Schluehr schrieb:
| > http://www.python.org/ftp/python/3.0/python-3.0a5.msi
|
| > Error 404: File Not Found
|
| > http://www.python.org/ftp/python/3.0/python-3.0a5.amd64.msi
|
| > Error 404: File Not Found
|
| The Windows binaries usually take a while. I'm adding Martin to the CC
| list. His is most like building the files today.

I am downloading the first version now. 





From shiningsandy at gmail.com  Mon May 19 03:32:41 2008
From: shiningsandy at gmail.com (sandeep)
Date: Mon, 19 May 2008 00:32:41 -0700 (PDT)
Subject: python script to windows exe
Message-ID: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>

hi all

i am very much a newbie to python but has some experience of
development.i am trying to write a script which will loop through the
outlook 2003 inbox and save the email data in an simple data.html page
and save all the attachments in a folder name emails.after some
initial struggling i am able to write this script.but now i want to
create the exe file of this script.i have used py2exe for this job and
created the exe. but when i run the exe my program in not behaving as
it supposed to be.its generating some errors.i dont know why this
thing is happening as when i run my script it works fine.can some one
put some light here. i am using python2.5 and is using
py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
service pack2.


thanks and reagrds
sandeep kumar sharma


From patrickstinson.lists at gmail.com  Thu May 22 14:13:46 2008
From: patrickstinson.lists at gmail.com (Patrick Stinson)
Date: Thu, 22 May 2008 10:13:46 -0800
Subject: statically linking release build on mac
Message-ID: <6214d7a20805221113ld148f65nefab1cf62437d889@mail.gmail.com>

I get an error reporting an unfound symbol using a statically linked release
build of python2.5 on a OSX-Tiger. This works fine on leopard, where the
system default python is version 2.5.1 - the same version that I'm using to
link to.

Sorry, I'm currently screwing with my configs and don't have a build to run
(my bad :) anymore, but the error is basically this:

Undefined symbol: _PY_DebugFlag
Referenced From: <my exe>
Expected in: <core audio framework lib image location>

I moved the system python frameworks out of the frameworks path for the
build and run just to make sure that they weren't somehow getting in the
way. I found that that symbol is defined in pydebug.h for both release and
debug builds. Also, I discovered that I can fix the problem with some of my
targets (I have both standalone exe and plugin lib versions of my app code)
by referencing the variable directly like this: int mine = Py_DebugFlag,
which fixes that symbol but then the next symbol in pydebug (PY_VerboseFlag)
is reported as undefined. After some playing with it, I found that the
following code will fix the problem in a basic standalone app:

    int _________mine;
    void *__________p = NULL;
    _________mine = Py_DebugFlag;
    _________mine = Py_VerboseFlag;
    _________mine = Py_InteractiveFlag;
    _________mine = Py_OptimizeFlag;
    _________mine = Py_NoSiteFlag;
    _________mine = Py_UseClassExceptionsFlag;
    _________mine = Py_FrozenFlag;
    _________mine = Py_TabcheckFlag;
    _________mine = Py_UnicodeFlag;
    _________mine = Py_IgnoreEnvironmentFlag;
    _________mine = Py_DivisionWarningFlag;
    _________mine = _Py_QnewFlag;
    __________p = (void *) _PyOS_ReadlineTState;
    __________p = (void *) PyOS_ReadlineFunctionPointer;


Woah, don't I feel like the lib is jerking me around a little? Anyway, this
works if I put it in main() for a standalone target, in a semi-random class
constructor for the AudioUnit target, and I still can't find the right place
to put it for the RTAS (
http://www.digidesign.com/index.cfm?query=developers%20plugin_info%20rtas.cfm&langid=1)
target. It's a little weird that I'm getting this at runtime and not at
link-time since I'm linking statically.

This is the standalone main() that works, but fails if I remove the above
code:

#include <Python.h>

int main(int, char **)
{
  int mine = -1;
  void *p = NULL;

  mine = Py_DebugFlag;
  mine = Py_VerboseFlag;
  mine = Py_InteractiveFlag;
  mine = Py_OptimizeFlag;
  mine = Py_NoSiteFlag;
  mine = Py_UseClassExceptionsFlag;
  mine = Py_FrozenFlag;
  mine = Py_TabcheckFlag;
  mine = Py_UnicodeFlag;
  mine = Py_IgnoreEnvironmentFlag;
  mine = Py_DivisionWarningFlag;
  mine = _Py_QnewFlag;
  p = (void *) _PyOS_ReadlineTState;
  p = (void *) PyOS_ReadlineFunctionPointer;

  Py_Initialize();

  Py_Finalize();
}


It seems to me like this might have something to do with setting up a symbol
lookup table correctly or something, I don't know. I'm not having any
problems with debug builds. This is the relevant part of my config.status.

ac_cs_version="\

python config.status
2.5

configured by ./configure, generated by GNU Autoconf
2.59,

  with options \"'--enable-universalsdk' '--disable-shared'\"


Help? *whimper*.. Cheers.
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From maxwell.newlands at gmail.com  Thu May 15 18:35:01 2008
From: maxwell.newlands at gmail.com (max)
Date: Thu, 15 May 2008 15:35:01 -0700 (PDT)
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org> 
	<87lk2ba4b4.fsf@mulj.homelinux.net>
	<8d566db4-c626-491f-82e4-303308c5b8da@25g2000hsx.googlegroups.com>
	<a505fe20-bf16-4e35-9089-61c556da8af4@m44g2000hsc.googlegroups.com>
Message-ID: <f3cf871a-9829-4f18-889f-02c507ec6048@27g2000hsf.googlegroups.com>

On May 15, 6:18?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 15, 9:00 pm, max <maxwell.newla... at gmail.com> wrote:
>
> > you're right, my java implementation does indeed parse for Id3v2
> > (sorry for the confusion). ?i'm using the getrawid3v2() method of this
> > bitstream class (http://www.javazoom.net/javalayer/docs/docs0.4/
> > javazoom/jl/decoder/Bitstream.html) to return an inputstream that then
> > i buffer and parse. ?apologies if i misrepresented my code!
>
> > back to python, i wonder if i'm misusing the mutagen id3 module. ?this
> > brief tutorial (http://www.sacredchao.net/quodlibet/wiki/Development/
> > Mutagen/Tutorial) leads me to believe that something like this might
> > work:
>
> > from mutagen.mp3 import MP3
> > id3tags = MP3(urllib2.urlopen(URL))
>
> > but this gives me the following TypeError: "coercing to Unicode: need
> > string or buffer, instance found". ?does this mean i need to convert
> > the "file-like object" that is returned by urlopen() into a unicode
> > object? ?if so, do i just decode() with 'utf-8', or is this more
> > complex? ?as of now, doing so gives me mostly "No such file or
> > directory" errors, with a few HTTP 404s.
>
> [snip]
> I think it's expecting the path of the MP3 but you're giving it the
> contents.

cool, so how do i give it the path, if not in the form of a URL
string?  maybe this is obvious...


From Lie.1296 at gmail.com  Sun May 25 13:49:54 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 25 May 2008 10:49:54 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<JemZj.61574$3v1.54084@bignews3.bellsouth.net>
Message-ID: <9194b663-422f-4b47-aa3b-402689ec708c@y22g2000prd.googlegroups.com>

On May 23, 5:14?am, "inhahe" <inh... at gmail.com> wrote:
> I don't like php. ?I tried it once and I had it sort a list, but the list
> was apparently too long for its sorting function because it just sorted the
> first so-many elements of it and left the rest in order, and didn't generate
> any error. ?I like a language that's actually determined by what you tell it
> to do. ? I hear it has a lot of security issues too. ?I'm not sure that php
> *runs* faster than python, having seen benchmarks, but it certainly loads
> faster. ?Maybe not so much of a difference once python25.dll is already in
> the cache though (speaking from a windows perspective). ?because when i load
> a program it can take a while but it's pretty quick if i'd just loaded one
> recently. ?but you don't necessarily have to load python for each page
> rendering anyway.
>
> I like the Python language a lot better than php. ?but I just really like
> Python.
>
> php mixes html and code out-of-the-box (sort of.. i guess it's more like a
> reversal of which one is explicit)... if you use Python you should look into
> a 'templating engine' like mako. ?i use cheetah, but mako is supposed to be
> better.
>
> i think Python is the easiest language to learn, with the possible exception
> of qbasic (just because making multidimensional arrays in python isnt that
> obvious, although maybe it is using numpy, i've never tried it). ?Python
> isn't as easy as basic if you use/have to read the more advanced features,
> but those aren't even available in basic. so I find it a comfortable
> learning curve.

You should see Basic's file operation syntax, ugly and hackish. All
those #1, #2, etc is ugly and unintuitive. That's why I've always
avoided anything related to file in Basic (no hard feelings to Basic
programmers, my first language is Basic and I'm pretty good at it
except for anything related with files). In python, file read is as
simple as open('path', 'mode'), and the for-loop can easily loop the
file object.


From kyrie at uh.cu  Thu May 29 17:35:55 2008
From: kyrie at uh.cu (Luis Zarrabeitia)
Date: Thu, 29 May 2008 17:35:55 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>
References: 4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com
	<bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>
Message-ID: <1212096955.483f21bb25a6b@comuh.uh.cu>

> On May 28, 11:46 pm, Dave Parker <davepar... at flamingthunder.com>
> wrote:
> > On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >
> > > > Kind of like how this year's program won't work on next year's
> > > > Python?
> >
> > "Like Perl 6, Python 3.0 will break backward compatibility. There is
> > no requirement that Python 2.x code will run unmodified on Python 3.0.

See? 2.x -> 3.x. Major version. Not "next week's python", not "next year's
python", but "the next mayor version of python". With a clean, well documented,
upgrade path.

Unlike "next month's Flaming Thunder". (Unless you are producing a new major
version every week, in which case I shut up, and may think about buying several
versions only so you must keep maintaining all of them)

-- 
Luis Zarrabeitia
Facultad de Matem?tica y Computaci?n, UH
http://profesores.matcom.uh.cu/~kyrie



From dteslenko at gmail.com  Wed May 14 03:13:48 2008
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Wed, 14 May 2008 11:13:48 +0400
Subject: file locked for writing
In-Reply-To: <91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>
References: <91325fec0805130757neb11c4aucfdf825db300d942@mail.gmail.com>
	<op.ua4l8yzfx6zn5v@gabriel2.softlabbsas.com.ar>
	<91325fec0805140004r3ced1ecdy94d48fbfc660136d@mail.gmail.com>
Message-ID: <91325fec0805140013x272094f5md19ffad3350a31fe@mail.gmail.com>

On Wed, May 14, 2008 at 11:04 AM, Dmitry Teslenko <dteslenko at gmail.com> wrote:
>  When I've rewrite code something like that:
>        with open(backup_file_name, 'w') as backup_file:
>                .....
>
>                filter.parse('<updated file name>')
>                del input, output, filter
>         os.remove(project.get_vcproj())
>         os.rename(backup_file_name, project.get_vcproj())
>
>  It triggers WindowsError on os.remove()

Using "programming by permutation" pattern I've finally solved that
thing: filter
for some reason doesn't close file after XMLFilterBase.parse(<file_name>);
even after del filter; Workaround for this is to pass <file_descriptor>
instead of <file_name> to XMLFilterBase.parse() and then explicitly close
file or put this call in with-block.


From python-url at phaseit.net  Mon May 12 12:30:18 2008
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 12 May 2008 16:30:18 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (May 12)
Message-ID: <g09raq$vq8$1@lairds.us>

QOTW:  "With Python, you can program with a smile on your face." - Gary
Herron
"Looking back over the years, after I learned Python I realized that I
never really had enjoyed programming before." - Aahz
    http://groups.google.com/group/comp.lang.python/browse_thread/thread/b4aa1d1578c26950/
    
    
    Python 2.6a3 and 3.0a5 released
        http://mail.python.org/pipermail/python-list/2008-May/490243.html
    
    Choosing a license for an open source project, and how it impacts 
    users, contributors *and* developers:
        http://mail.python.org/pipermail/python-list/2008-May/489663.html
        http://mail.python.org/pipermail/python-list/2008-May/489840.html
    
    Are we missing something due to Python not having interfaces?
        http://mail.python.org/pipermail/python-list/2008-May/489799.html
    
    Anonymous for-loops (a "repeat N times" loop) and anonymous asignments:
        http://mail.python.org/pipermail/python-list/2008-May/490591.html
        http://mail.python.org/pipermail/python-list/2008-May/490723.html
    
    Why should a programmer learn Python as a new language?
        http://mail.python.org/pipermail/python-list/2008-May/490110.html
    
    Two questions about the Observer pattern:
        http://mail.python.org/pipermail/python-list/2008-May/490387.html
        http://mail.python.org/pipermail/python-list/2008-May/490168.html
    
    How to use overridable methods when defining a property:
        http://mail.python.org/pipermail/python-list/2008-May/490451.html
    
    Tim Golden explains how to recursively walk the Windows registry:
        http://mail.python.org/pipermail/python-list/2008-May/489741.html
    
    Find anagrams in a list of words:
        http://mail.python.org/pipermail/python-list/2008-May/490061.html
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From rpm9deleteme at earthlink.net  Thu May 22 23:54:07 2008
From: rpm9deleteme at earthlink.net (RPM1)
Date: Thu, 22 May 2008 23:54:07 -0400
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <g15f54$lcd$1@aioe.org>

John Salerno wrote:
> 
> Basically, the question is this: can you write the logic behind a 
> program (whether it be a game, an email client, a text editor, etc.) 
> without having any idea of how you will implement the GUI?

Chess already has at least two solutions that are in widespread use:

Winboard
UCI (Universal Chess Interface)

Basically you write your chess "engine" to speak either Winboard or UCI 
and then you can "run" it in one of the various GUI interfaces, (such as 
Shredder, Fritz, Arena, ...).

See:
http://www.playwitharena.com/

or the comparatively young:
http://pychess.googlepages.com/        (which is written in Python)


Patrick


From siddhantgoel at gmail.com  Tue May  6 03:23:32 2008
From: siddhantgoel at gmail.com (Siddhant)
Date: Tue, 6 May 2008 00:23:32 -0700 (PDT)
Subject: Confusion regarding the readline module
Message-ID: <8c46be09-35bf-429f-b3c7-5c68abbd548b@f24g2000prh.googlegroups.com>

Hi!
I am having some doubts related to the readline module. I hope someone
could clear them.
1. What exactly does the readline.get_line_buffer() function do? Does
it return whatever is the current input by the user? If yes, then can
I use it to check the current inputs of the user and base the next-
word completion against whatever the user has entered so far? There
wasn't much documentation on it, and a lot of googling couldn't help
much. :(
2. Related to the completer function, what is meant by returning the
"state"th completion for "text"? Is the completer function called
everytime (for all possible values of "state") when I press the Tab
key? When/How is it called?

Basically, I need to define a completer function, that should take
into consideration whatever the user has entered so far, and complete
the next word accordingly. The same way as a "cd /some/file" is
meaningless.


From benjamin.kaplan at case.edu  Tue May 20 12:40:37 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 20 May 2008 12:40:37 -0400
Subject: Access to sysctl on FreeBSD?
In-Reply-To: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
References: <fc87bd04-8960-4a79-b5f7-8ba1aa0b00e6@u6g2000prc.googlegroups.com>
Message-ID: <ec96e1390805200940l42ee2c5duc83b315ab1990d68@mail.gmail.com>

On Tue, May 20, 2008 at 12:26 PM, Skye <spoier at gmail.com> wrote:

> How do I access the sysctl(3) call from Python on BSD?
>
> Specifically I want to retrieve:
>
> $ sysctl -d net.inet.ip.stats
> net.inet.ip.stats: IP statistics (struct ipstat, netinet/ip_var.h)
>
> So I'll need some way of getting to struct ipstat from Python as well
>
> Thanks,
> Skye
>

You could use subprocess.Popen to run the command yourself and just parse
the output.

http://docs.python.org/lib/node528.html

>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From rhamph at gmail.com  Sat May 31 13:13:39 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sat, 31 May 2008 10:13:39 -0700 (PDT)
Subject: ThreadPoolingMixIn
References: <3d9dac72-ce4d-4ce5-9213-4bb17aff2f9e@r66g2000hsg.googlegroups.com>
Message-ID: <1c4d113e-b375-471d-9d54-1401c8844352@t12g2000prg.googlegroups.com>

On May 30, 2:40 pm, pavel.uva... at gmail.com wrote:
> Hi, everybody!
>
> I wrote a useful class ThreadPoolingMixIn which can be used to create
> fast thread-based servers. This mix-in works much faster than
> ThreadingMixIn because it doesn't create a new thread on each request.

Do you have any benchmarks demonstrating the performance difference/


>             t.setDaemon(True)

Unfortunately, shutdown with daemon threads is fairly buggy. :/


From istvan.albert at gmail.com  Tue May 20 18:20:18 2008
From: istvan.albert at gmail.com (Istvan Albert)
Date: Tue, 20 May 2008 15:20:18 -0700 (PDT)
Subject: Processing in Python
References: <483345f5$0$902$ba4acef3@news.orange.fr>
	<69h0p9F327mqgU1@mid.uni-berlin.de>
Message-ID: <d7e14c08-ea46-4f33-897e-0f29c6ce36da@a32g2000prf.googlegroups.com>

On May 20, 6:13 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Salvatore DI DI0 schrieb:
>
> > Hello,
>
> > The Processing Graphics language has been implemented in Javascript.
>
> No, it hasn't. Processing is written in Java.

He meant it has been re-implemented in Javascript:

http://ejohn.org/blog/processingjs/

The closest python based equivalent of Processing is NodeBox but it is
a OS X product:

http://nodebox.net/code/index.php/Home

There is a jython based NodeBox that runs on windows that can be found
here:

http://research.nodebox.net/index.php/NodeBoxDev

i.




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 27 03:47:41 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 27 May 2008 09:47:41 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<3e448982-d457-4a7e-a291-8d4a1dd112fb@d1g2000hsg.googlegroups.com>
Message-ID: <483bbc97$0$5505$426a74cc@news.free.fr>

erik.oosterwaal at gmail.com a ?crit :
>> There are a couple points I don't get here. Mostly: how is your
>> application logic separated from the presentation logic if you "intermix
>> code directly into the HTML" ? Or are you pages including the libs,
>> getting the appropriate data out of the DB, and then including another
>> file acting as a template ? If so, then how are you're "pages" different
>> from MVC frameworks controllers ?
> 
> I have the WSC files as "libraries" I can open in a standard ASP page,
> So for example, to get a recordset in one of my ASP pages, I would use
> something like
> 
> 	Dim objUsers, Recordset_of_users
> 	Set objUsers= GetObject("script:" & Server.MapPath("/~components/
> users.wsc"))
> 		objUsers.open()
> 		Set Recordset_of_users =
> objUsers.getUsersByGroup(request.queryString("group_id"))
> 		objUsers.close()
> 	Set objUsers= Nothing
> 
> I put code like this at the top of my ASP pages, and inside the HTML
> code I can use "Recordset_of_users" and loop through it (for example).
> All code in the asp pages is getting and setting information, or
> looping through it. All real (business) logic is inside the WSC files.

> The only real difference is that I don't use the "C" of MVC.

Yes you do. It's exactly what your code snippet above is : a controller. 
   Or at least the same part of the controller that we identify as such 
in web MVC frameworks (the web server and request to handlers mechanism 
being the other, less visible but still present part). Having the 
controller's code mixed up with the view is pretty common in GUI 
toolkits, and not so uncommon in "server pages" frameworks.


> I dislike
> a controller that calls and routes functionality based on the URL.

Oh yes ? And how is it so different from having the web server routing 
to requests to .asp files calls based on a url-filesystem mapping ?-) 
Except, of course, that getting rid of the filesystem mapping decouples 
the app's urls scheme from the source code inner organisation ?

> The
> M (model) functionality is covered by the WSC files. The V (view) are
> the asp pages themselves. The controller part is handled by the asp
> pages aswell, just using regular links, GETs and POSTs in forms.
> 
>> But, IMHO, writing PHP-style Python webapp is silly.
> 
> :) Maybe I need to pick up a new style of programming as well, on top
> of just a new language...

Given your above explanations, I don't think going the "full" MVC route 
would require that much changes to your current habits. That is mostly: 
splitting the controller part from the view part, and learn to declare 
your url mapping instead of physically structuring your source depending 
on the url scheme.

>> Better shoot yourself in the foot with a PHP-like Python-thing, than
>> committing suicide by shooting yourself into the head with PHP ...
> 
> LOL, point taken.
> 
> So to summarize: it should be possible to get exactly what I want, but
> it's not advisable, because the frameworks aren't designed to work
> like this. That makes sense.
> I want to thank you guys for all the advice, I have a lot of
> frameworks and template-engines to look into now, I'll have a look at
> all that you mentioned to see which one suits me best. Judging from
> the quick and thorough support from the Python community, I think I
> will stick with a proven framework and/or style, so I can ask a
> question once in a while.

May I suggest Pylons ? It's not yet the more stable and finished option, 
but from what I know of 'classic' ASP and how you explained to usually 
work, I think you might be confortable with it.

> There is probably less sense in trying to pick up a new language while
> at the same time trying to stick to the methods I used in an old
> language.

Hear hear !-)

> But hey, I thought, maybe a thing like this already exists
> exactly like I want it... Ah well.
> 
> Thanks again all, take care!
> 
> Erik
> 
> 
> 


From dullrich at sprynet.com  Fri May 30 10:34:38 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:34:38 -0500
Subject: How to covert ASCII to integer in Python?
References: <mailman.1763.1212139351.12834.python-list@python.org>
Message-ID: <dullrich-8B8493.09343730052008@text.giganews.com>

In article <mailman.1763.1212139351.12834.python-list at python.org>,
 "Skonieczny, Chris" <Skonieczny.C at emssatcom.com> wrote:

> YOU SHOULD REMOVE or CORRECT YOUR POST here: 
> http://mail.python.org/pipermail/python-list/2007-February/427841.html  

Why? There's nothing wrong there.

> It is not true - eg. try : 
> a='P'            # P is ASCII , isn't it ? 
> b=int(a)
> and what you will get ? An error !!!

You really don't see any difference between
"convert '1' to an integer" and "convert 'P' to an integer"?

In case there's actually a problem you're trying to solve
here, try ord instead of int.

> Or probably you yourself should - quote : 
> "You probably should go through the tutorial ASAP that is located here:
> 
> http://docs.python.org/tut/ "
> 
> ---------------------------------------------------------------------
> [Image]

-- 
David C. Ullrich


From python at rcn.com  Wed May 14 20:01:16 2008
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 14 May 2008 17:01:16 -0700 (PDT)
Subject: What's a call-tip to do?
References: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>
Message-ID: <c40b3f66-2ffc-4654-ad85-782bd25d5312@i36g2000prf.googlegroups.com>

On May 14, 8:24?am, Tal Einat <tal.no.no.s... at gmail.com> wrote:
> I just ran into this. In IDLE (Python 2.5), the call-tip for
> itertools.count is:
> "x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

My IDLE (1.2.2 running on Python 2.5.2) has the correct call-tip. I
don't know why yours is different.  Also, help(itertools.count) does
the right thing.

Raymond




From deets at nospam.web.de  Fri May 23 05:44:58 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 23 May 2008 11:44:58 +0200
Subject: pyserial and file open conflict?
In-Reply-To: <88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
References: <21c8f220-aa3c-40b8-b1de-3aa35472e2dc@26g2000hsk.googlegroups.com>
	<S_OdncAnTZN76bHVnZ2dnUVZ_tTinZ2d@posted.visi>
	<88948db2-aade-4f20-a6ba-bc14c2b4c657@d77g2000hsb.googlegroups.com>
Message-ID: <69ni0qF3499pqU1@mid.uni-berlin.de>

> 
> Do you have to much time?

Maybe you have enough time to read this:

http://www.catb.org/~esr/faqs/smart-questions.html

Diez


From sjmachin at lexicon.net  Tue May 13 18:41:16 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 22:41:16 GMT
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1059.1210699996.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>	<68t4o0F2vaoncU1@mid.uni-berlin.de>	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>	<68trmmF2vjivnU1@mid.uni-berlin.de>	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com>
	<mailman.1059.1210699996.12834.python-list@python.org>
Message-ID: <482a190b@news.mel.dft.com.au>

D'Arcy J.M. Cain wrote:
> On Tue, 13 May 2008 19:57:10 +0300
> "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:
>> Not everybody has grown in English-speaking community, you know. And
>> knowing math quite good, I prefer writing "x = y" instead of "Set x to
>> y".
> 
> OMG!  It's COBOL.
> 
> Wasn't there an aborted attempt at writing a language based on English
> back in the sixties or seventies?  I seem to recall that it failed
> mainly because it turns out that programmers don't like to speak in
> English, even when it is their first language, to describe computer
> algorithms.  

IIRC the idea was so that managers could write programs in English. It 
failed because nobody could write a parser that would handle something 
like "The bottom line is that the stakeholder group requires the 
situation going forward to be such as to facilitate the variable known 
as x to provide the same outcome when stimulated by dereferencing as the 
variable known as y".


From dullrich at sprynet.com  Tue May 27 11:48:22 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 10:48:22 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
	<mailman.1650.1211901194.12834.python-list@python.org>
Message-ID: <dullrich-A3670A.10482127052008@text.giganews.com>

In article <mailman.1650.1211901194.12834.python-list at python.org>,
 "Andrii V. Mishkovskyi" <mishok13 at gmail.com> wrote:

> 2008/5/27 David C. Ullrich <dullrich at sprynet.com>:
> > On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
> > <deets at nospam.web.de> wrote:
> >
> >>David C. Ullrich wrote:
> >>
> >>> What version added decorators (using the
> >>> @decorator syntax)?
> >>>
> >>> (Is there a general way I could have found out the answer myself?)
> >>>
> >>> Is there a somthing such that "from __future__ import something"
> >>> will make decorators work in 2.5.2?
> >>
> >>They do work. They were introduced in python2.4
> >
> > That's more or less what I thought, but...
> >
> > Oh. Never mind the details, let's just say that having 2.3 and
> > 2.5 installed on the same machine can lead to confusion
> > about exactly which one you're running a script under.
> > Duh.
> >
> > Sorry. Thanks. I don't suppose that decorators are available
> > from __future__ somehow in 2.3?
> >
> 
> Nope, they don't.
> Anyway, decorators are just a syntactic sugar, why would you need this
> feature in 2.3?

I don't _need_ it. Read up about decorators the other day at the
office and couldn't figure out why the same code didn't work at
home...

> >>Diez
> >
> > David C. Ullrich
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >

-- 
David C. Ullrich


From nospam at nospam.invalid  Thu May 29 12:40:38 2008
From: nospam at nospam.invalid (Rahul)
Date: Thu, 29 May 2008 16:40:38 +0000 (UTC)
Subject: yum installs Tkinter in a way visible to only one python installation
Message-ID: <Xns9AAD76CA94F216650A1FC0D7811DDBC81@85.214.90.236>

My RHEL yum package-manager comes with  Python-2.4.3. We also have a 
seperate Python-2.4.4 Installation on our box.

When I added Tkinter using 'yum install tkinter' it seems to have added it 
in a manner that it is exclusively visible to Python-2.4.3. I cannot import 
Tkinter from Python-2.4.4. 

What's the best way to work around this? 

-- 
Rahul


From bignose+hates-spam at benfinney.id.au  Wed May 21 21:12:38 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 May 2008 11:12:38 +1000
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
Message-ID: <8763t7dtvd.fsf@benfinney.id.au>

alex23 <wuwei23 at gmail.com> writes:

> On May 22, 9:13 am, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> > In case it's not clear what I meant: after executing
> > some_function() exception SomeExcpetion gets risen. Then, in
> > except block I do something to fix whatever is causing the
> > exception and then I would like to go back to try block, and
> > execute some_function() again. Is that doable?
> 
> If you know what exception to expect, and you know how to "fix" the
> cause, why not just put tests _before_ some_function() is called to
> ensure that everything is as it needs to be?

This is LBYL ("Look Before You Leap") programming style, and is
contrasted with EAFP ("it is Easier to Ask Forgiveness than
Permission") style.

    <URL:http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html>

EAFP is usually considered more Pythonic, and usually results in
smaller, clearer code.

I'm currently undecided in this case whether EAFP is correct ? though
I suspect it is, as in most cases. I wanted to address your "why not
LBYL" question though.

-- 
 \          ?Courage is not the absence of fear, but the decision that |
  `\             something else is more important than fear.? ?Ambrose |
_o__)                                                          Redmoon |
Ben Finney


From bearophileHUGS at lycos.com  Sat May 24 13:18:33 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 24 May 2008 10:18:33 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>
	<87prrbk85x.fsf@gmail.com>
	<b054e0fa-c246-4d0a-8951-a907dadc066e@34g2000hsh.googlegroups.com>
Message-ID: <06174f9e-ed5b-4107-b646-ef115262268f@d45g2000hsc.googlegroups.com>

Ben Finney:
>In Python, the philosophy "we're all consenting adults here" applies.<

Michael Foord:
> They will use whatever they find, whether it is the best way to
> achieve a goal or not. Once they start using it they will expect us to
> maintain it - and us telling them it wasn't intended to be used by
> them in the first place won't cut it.

So they will use the methods with one or two underscores too. And
imply that you want to document them too.
They don't seem adult enough, then ;-)
Internal API hiding seems quite less useful if you don't need to let
customers manage your code.

Bye,
bearophile


From jcd at unc.edu  Fri May  2 08:01:19 2008
From: jcd at unc.edu (J. Clifford Dyer)
Date: Fri, 02 May 2008 08:01:19 -0400
Subject: Custom Classes?
In-Reply-To: <4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
Message-ID: <1209729679.6589.23.camel@jcd-desktop>

On Thu, 2008-05-01 at 17:31 -0500, Victor Subervi wrote:
> On Wed, Apr 30, 2008 at 12:35 PM, J. Cliff Dyer <jcd at unc.edu> wrote:
>         Post working code, and I'll answer your actual question.
> 
> Good grief!  The code is *not* double spaced! Take a look. Click to
> the end of the first line and hit the right arrow key, and see for
> yourself.  As for not initializing w, well, I did in my code and just
> forgot to cut and paste that. Same with the except. Sorry on those.
> And yes, I pull out try clauses when I need to look at stacks. Here:

Taking a closer look--it's still double spaced, but I'm sure that's just
something funky in how it's getting rendered along the way.  

That said, your code still doesn't work.  After removing your try
statements, and the corresponding except-pass blocks, I get the
following problems:

Traceback (most recent call last):
  File "test.py", line 5, in <module>
    os.remove(getpic)
NameError: name 'os' is not defined

and when I fix that:

Traceback (most recent call last):
  File "test.py", line 34, in <module>
    print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">'
% pic

Please test your code snippet before you post it.  Testing the program
you extracted it from is not sufficient.

On line 34 (or thereabouts--I had to add a line for import os, and
stripped out all blank lines, since my email client is still rendering
it double spaced), I think you wanted "x" instead of str(x).  At least,
that's what your generated script wants.  str(x) takes the value of the
variable x (not yet defined), and converts it to a str.  It does not
give you a str with a value of "x".  

As for the generated script, why are you creating that on the fly every
time?  Why not just create it as an independent python file?  When you
want an image displayed in another HTML file, static or generated, just
point your src to that python file with the appropriate arguments.

<img src='http://example.com/path/to/getpic.py?x=4'/>

Also, remove the line that says "print 'Content-Type: text/html'."  You
only need one content type, and it should be image/jpeg, or whatever
type your images are.  If you are going to have a few pngs in there as
well, for example, you'll need some mechanism for determining what type
of image the file actually is, and outputting the appropriate header
from:

Content-Type: image/jpeg
?Content-Type: image/png
?Content-Type: image/gif

This could be by checking the file extension, probing the file itself,
or by including the mime-type in your pics dictionary like so:

pics = {1: ('pic1', 'image/jpeg'), 2: ('pict_num_two', 'image/png')} 


Then, of course, you'll have to revise how you retrieve the information.

That should be enough to get you moving in the right direction.

Cheers,
Cliff
> 
> 
> w = 0
> 
> 
> try:
> 
>   w += 1
> 
>   getpic = "getpic" + str(w) + ".py"
> 
>   try:
> 
>     os.remove(getpic)
> 
>   except:
> 
>     pass
> 
>   code = """
> 
> #!/usr/local/bin/python
> 
> import cgitb; cgitb.enable()
> 
> import MySQLdb
> 
> import cgi
> 
> import sys,os
> 
> sys.path.append(os.getcwd())
> 
> from login import login
> 
> user, passwd, db, host = login()
> 
> form = cgi.FieldStorage()
> 
> picid = int(form["id"].value)
> 
> x = int(form["x"].value)
> 
> pics =
> {1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
> 
> 9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
> 
> pic = pics[x]
> 
> print 'Content-Type: text/html'
> 
> db = MySQLdb.connect(host=host, user=user, passwd=passwd, db=db)
> 
> cursor= db.cursor()
> 
> sql = "select " + pic + " from products where id='" + str(picid) +
> "';"
> 
> cursor.execute(sql)
> 
> content = cursor.fetchall()[0][0].tostring()
> 
> cursor.close()
> 
> print 'Content-Type: image/jpeg'
> 
> print
> 
> print content
> 
> """
> 
>   script = open(getpic, "w")
> 
>   script.write(code)
> 
>   print '<td><input type="hidden" name="%s"' % str(x), ' value="%s">'
> % pic
> 
>   print '<img src="%s?id=%d&x=%d"><br /><br /></td>\n' % (getpic, d,
> y)
> 
> except:
> 
>   pass
> 
> 
> TIA,
> Victor
> 
-- 
Oook!
J. Cliff Dyer
Carolina Digital Library and Archives
UNC Chapel Hill



From d.a.abernathy at gmail.com  Wed May  7 16:43:05 2008
From: d.a.abernathy at gmail.com (dj)
Date: Wed, 7 May 2008 13:43:05 -0700 (PDT)
Subject: Looking for Fredrik Lundh; documentation and code examples for 
	elementtree
Message-ID: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>

Hello All,

I am trying to get in touch with Mr. Lundh. I am looking for exmaple
code regarding the use of elementtree. I have read through most of the
examples on http://effbot.org and I am hoping he can suggest some
others. Additionally, I am hoping he can give me an example use of the
comment method. I have tried a couple times, but I can not figure it
out. Thank you so very much.

DJ


From notnorwegian at yahoo.se  Fri May 23 23:25:46 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Fri, 23 May 2008 20:25:46 -0700 (PDT)
Subject: simple url regexp
Message-ID: <545f4025-ff39-4eaa-871d-7aa4cca722a7@k13g2000hse.googlegroups.com>

url = re.compile(r"((http|ftp|https)\:\/\/)(www)?([a-zA-Z]{1}([\w\-]+
\.)+([\w]{2,5}))(:[\d]{1,5})?((/?\w+/)+|/?)(\w+
\.[\w]{3,4})?((\?\w+=\w+)?(&\w+=\w+)*)?")

damn i hate these things.

i want it to only match http://www.name.any/etc

not http://wiki.x etc



From marlin_rowley at hotmail.com  Thu May 15 15:50:54 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 15 May 2008 14:50:54 -0500
Subject: How do I use the unpack function?
In-Reply-To: <482C6E59.3020503@islandtraining.com>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>
	<mailman.1172.1210867897.12834.python-list@python.org>
	<d931e42d-8077-43f2-b049-d8cbc775d992@p39g2000prm.googlegroups.com> 
	<482C6E59.3020503@islandtraining.com>
Message-ID: <BAY135-W27F2B5465059A8EF8EB0469FC90@phx.gbl>


Gary,

I'm getting streaming tile data from a renderer in order to allow the user to see the rendering of tiles in real-time to create the total image.  I'm NOT reading an entire image scanline-by-scanline.  The renderer streams in a series of floats (for each tile) and I build this tile up from each individual color component passed in.  I then convert it to a small bitmap and blit() it to the window that will eventually make up my entire image.  I'm just wanting to make the process as fast as the renderer can render the tiles.  I've noticed on scenes that aren't very complex for the renderer that my python script is spending most of it's time drawing while the renderer is already done.  What you've given me has sped up the drawing a lot, but I'm hungry for more optimization!

There is no file format to be read.  The data is raw bytes and can be any format.

> Date: Thu, 15 May 2008 10:09:45 -0700
> From: gherron at islandtraining.com
> CC: python-list at python.org
> Subject: Re: How do I use the unpack function?
> 
> John Machin wrote:
> > On May 16, 2:11 am, Gary Herron <gher... at islandtraining.com> wrote:
> >   
> >> Marlin Rowley wrote:
> >>     
> >>> All:
> >>>       
> >>> I've got a script that runs really slow because I'm reading from a
> >>> stream a byte at a time:
> >>>       
> >>> // TERRIBLE
> >>> for y in range( height ):
> >>>         for color in range(4):
> >>>             for x in range( width ):
> >>>                 pixelComponent = fileIO.read(4)
> >>>                 buffer = unpack("!f",pixelComponent)  << unpacks ONE
> >>>       
> >
> > [snip]
> > Perhaps the OP might be able to use the Python Imaging Library (PIL)
> > instead of reinventing an image-file handler.
> >   
> 
> Indeed.  That's why my original answer included the line:
>     There are probably better ways overall, but this directly answers 
> your question.
> 
> Other possibilities.
> 
> I don't recognize the file format being read in here, but if it is a 
> standard image format, the PIL suggestion is a good way to go.
> 
> Or, if it is an image of not too enormous size, read the *whole* thing 
> in at once. 
> 
> Or rather than manipulate the array by carving off 4 bytes at a time, 
> just index through it in 4 byte chunks:
>   for i in range(width):
>       buffer = unpack("!f", pixelComponent[4*i:4*i+4])
> 
> Or
>   for i in range(0,4*width,4):
>       buffer = unpack("!f", pixelComponent[i:i+4])
> 
> Or
>   Use numpy.  Create an array of floats, and initialize it with the byte 
> string, making sure to take endianess int account.  (I'm quite sure this 
> could be made to work, and then the whole operation is enormously fast 
> with only several lines of Python code and *no* Python loops.
> 
> Or
>   ...?
> 
> Gary Herron
> 
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >   
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Windows Live SkyDrive lets you share files with faraway friends.
http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008
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From johnjsal at NOSPAMgmail.com  Tue May 27 13:49:37 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 27 May 2008 13:49:37 -0400
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>
Message-ID: <483c4ac8$0$7286$c3e8da3@news.astraweb.com>

"cm_gui" <cmgui2 at gmail.com> wrote in message 
news:5ccb8e61-ad53-48aa-b6ac-a6034907c36c at a32g2000prf.googlegroups.com...

> okay, maybe Python is only slightly slower than PHP,
> but it APPEARS to be much slower.

> there is a distinct waiting time whenever you access a python web page
> before the page starts loading.  but once it loads, it is fast.

> php page starts loading immediately once you access it,
> but you can see the page slowly loading.
> because you see the page starts loading immediately, you feel it is
> fast.

::crickets:: 




From hat at se-162.se.wtb.tue.nl  Mon May 19 04:19:38 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 19 May 2008 10:19:38 +0200
Subject: Organizing a Python project
References: <960da03c-1edf-4fa4-b434-6656e8a8884f@e39g2000hsf.googlegroups.com>
Message-ID: <slrng32e0q.egt.hat@se-162.se.wtb.tue.nl>

On 2008-05-19, ivarnelispam at gmail.com <ivarnelispam at gmail.com> wrote:
> Hello all,
>
> I'm starting work on what is going to become a fairly substantial
> Python project, and I'm trying to find the best way to organize
> everything. The project will consist of:
>
> - A few applications
> - Several small scripts and utilities
> - Unit tests and small interactive test programs
> - A number of custom libraries and modules that may be shared and
> referenced among all of the above
>
> I have the following general structure in mind:
>
> myproject/
>   app1/
>     main.py
>     file1.py
>     file2.py
>     tests/
>       test_abc.py
>       test_xyz.py
>   app2/
>     ...
>   scripts/
>     script1.py
>     script2.py
>   shared/
>     mylib1/
>       file1.py
>       file2.py
>       tests/
>         test_foo.py
>         test_bar.py
>     mylib2/
>       ...
>
>
> The files that you might want to execute directly are:
>   - Any of the "main.py" files under app*/
>   - Any of the files under shared/
>   - Any of the files under app*/tests or shared/mylib*/tests
>
> So, my questions:
> First of all, does this look like a reasonable overall structure, or
> are there better alternatives?

You could make a 'bin' directory next to 'myproject' with executable programs
which would usually do something like

#!/usr/bin/env python
from myproject.app1 import main
main.run()

to make a more clear seperation between code that can be executed and code that
is imported in an application.


Also, why do you make a distinction between shared and non-shared code?
You could simply eliminate 'shared' directory, and put its contents directly
under myproject.

> Second (and the thing I'm primarily interested in), what is the best
> way to deal with importing the shared modules in the applications,
> scripts, test programs, and possibly other shared modules? I think the
> most obvious solution is to add /path/to/myproject to PYTHONPATH.
> However, this seems like an annoying little dependency that you are
> likely to forget whenever you move your workspace to a new path, open
> up a branch of the project in a different directory, or download and
> work on the project using a different computer.

What I am missing here is how you plan to do the development.
If you want to do branch-based development, you may want to have a look at
Combinator (at divmod.org). It handles branch management, adds executable
programs from bin to your path (in your current branch), and extends PYTHONPATH
(with your current branch).

Even if you have just 1 branch (namely 'trunk') it may be useful.


> Is there a way to set this up that is a bit more self contained? For
> example, at first I was somewhat hopeful that Python could ascend
> parent directories until it reached a directory that did not include
> an __init__.py file, and it could use this as a root for referring to
> packages and modules from any file contained within. (e.g. in the
> example project above, any file could refer to myproject.shared.mylib1
> so long as 'myproject' and all subdirectories contained an
> __init__.py, and the parent of 'myproject' didn't contain such a
> file). Evidently this is not the case, but it seems like it could be a
> useful feature in these situations.

Work is being done on relative imports. Not sure of its state.

> Anyway, I'm sure this is not an unusual situation, so I'm curious to
> hear how other people have handled it.

Most people probably run scripts from the root, ie where 'myproject' is a
sub-directory. Since Python automatically adds '.' to its path, it will work.

Sincerely,
Albert


From paddy3118 at googlemail.com  Tue May 27 03:43:18 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 27 May 2008 00:43:18 -0700 (PDT)
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net> 
	<mailman.1634.1211868017.12834.python-list@python.org>
	<m2O_j.17782$hv2.6558@bignews5.bellsouth.net>
Message-ID: <6382bf6f-3478-4a88-8f43-3b38c20d3b85@l64g2000hse.googlegroups.com>

On May 27, 7:42 am, "inhahe" <inh... at gmail.com> wrote:
> Well, I just need it once in a while.  Actually now is the only time I
> remember.  The last time what I needed was a file name extension.  I want a
> string called headers, but I want to derive a dict from it, also called
> headers.  So I figured the string would be called strHeaders, and the dict,
> dctHeaders probably, but when a precedent for something like that exists, I
> like to use it.
>
> "Kam-Hung Soh" <kamhung.... at gmail.com> wrote in message

I have a my own sometime used convention od using dict names that
mirror
what is being mapped to what, so a dict mapping headers to body might
be called head2body, in general a mapping from x to y I might call
x2y.

- Paddy.


From deets at nospam.web.de  Sun May 25 10:50:57 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 16:50:57 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<69t0qlF356llmU1@mid.uni-berlin.de>
	<roy-03A2A7.10390625052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69tcmkF357g9nU1@mid.uni-berlin.de>


> Here's an example of why *running* tests in order can make sense.
> 
> You could have a bunch of tests of increasing complexity.  The first bunch 
> of tests all run in a few seconds and test some basic functionality.  From 
> experience, you also know that these are the tests that are most likely to 
> fail as you port to a new environment.
> 
> There's also some tests which take a long time to run.  If the basic stuff 
> that's being tested by the earlier tests doesn't work, there's no way these 
> tests could pass, but they still take a long time to fail.
> 
> It's really handy to have the simple tests RUN first.  If you see they 
> fail, you can cancel the rest of the test run and get on with fixing your 
> code faster.

I don't see this as something that can be solved by ordering tests - 
*especially* not on a per-method-level as the OP suggested, because I 
tend to have test suites that span several files.

Instead when I've been in the situation that you describe before, I 
resorted to an approach where I annotated tests as long or short-running 
(or any other criteria), and then ran the tests that were appropriate.

For example, post-commit-tests needed to be short, as otherwise the 
feedback came to slow.

  Annotation could be done explicit, or implicit by grouping tests 
together that had the desired property. However, as I prefer tests that 
share e.g. the same module to test the same functionality, I rather have 
an annotation mechanism.

So *if* anything should be changed IMHO it would be the introduction of 
a tagging system or something equivalent, together with a selection 
mechanism based on that.

> It's a good thing to make it easy to do things the right way, and difficult 
> to do things the wrong way.  The danger is when you let your pre-conceived 
> notions of right and wrong trick you into making it difficult to do things 
> any way but YOUR way.
> 
> So far, the strongest argument I've seen against the OP's idea is that it's 
> not portable to Iron Python.  That's a legitimate argument.  All the rest 
> of the "You're not supposed to do it that way" arguments are just religion.

So far the reasons for introducing them haven't been compelling either. 
Neither does it work over several testsuites, nor is it the only thing 
that can order *results*, which you (rightly so) claimed as being useful.

Diez


From bbcofchina at yahoo.com.cn  Fri May  9 09:46:46 2008
From: bbcofchina at yahoo.com.cn (=?gb2312?q?<=CE=AB=B7=BB=B7=E7=F3=DD>?=)
Date: Fri, 9 May 2008 21:46:46 +0800 (CST)
Subject: =?gb2312?q?=BB=D8=B8=B4=A3=BA=20Re:=20Pythonwin?=
In-Reply-To: <3de8e1f70805090623vbca5677pce3317a1dd39428@mail.gmail.com>
Message-ID: <166810.62945.qm@web15001.mail.cnb.yahoo.com>


  In arcgis dvd , you can find a "desktop" file ,open the file ,then a "pythonwin" file,open the file ,then you install "pywin32-207.win32-py2.4.exe"
  THIS IS OK!
Banibrata Dutta <banibrata.dutta at gmail.com> ???
    if one has installed ActiveState Python 2.5, I think it'd have been 
  Start Menu --> Programs --> ActiveSte ActivePython 2.5 --> <app>
  and I think it delivers IDLE, not PythonWin.
  
 
  On 5/9/08, Mike Driscoll <kyosohma at gmail.com> wrote:   On May 9, 5:30 am, Clive_S <clives... at yahoo.co.uk> wrote:
> Hi
>
> I am trying to use Python with ArcGIS.
>
> I have installed Python 2.4. I have an icon for IDLE and command line.
> I do not see Python PythonWin.
>
> How do you install or launch pythonwin??
>
> Thanks
>
> Clive

I have PythonWin installed in my Start Menu --> Programs --> Python
2.5. I may have installed the ActiveState version though. Just check
if it's there on your system and if not, you can follow Niklas's
advice.

Mike

--
http://mail.python.org/mailman/listinfo/python-list




-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com --
http://mail.python.org/mailman/listinfo/python-list

       
---------------------------------
 ????????????
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From upton at virginia.edu  Wed May 21 13:05:56 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 13:05:56 -0400
Subject: can someone with guessing a number
In-Reply-To: <9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
	<9f9d35df0805210954g5b2bb7bye48cf835b413069f@mail.gmail.com>
	<9f9d35df0805210955r2a00a3f6hfd71fe560a2760e6@mail.gmail.com>
Message-ID: <5504f9ac0805211005p678df2d0r3ee19071b758090f@mail.gmail.com>

On Wed, May 21, 2008 at 12:55 PM, abhilash pp <afilash+python at gmail.com> wrote:
>> On Wed, May 21, 2008 at 10:12 PM, garywood <woodygar at sky.com> wrote:
>>>
>>> I would just like the program to exit after guessing the amount of
>>> numbers wrong
>>>
>>> # Guess My Number
>>> import random
>>> the_number = random.randrange(100) + 1
>>> tries = 1
>>> # guessing loop
>>> while (guess != the_number):
>>>     if (guess > the_number):
>>>         print "Lower..."
>>>     else:
>>>         print "Higher..."
>>>
>>>     guess = int(raw_input("Take a guess: "))
>>>     tries += 1
>>>     if tries > 10:
>>>         print 'you failed- give up'
>>>
>>> print "You guessed it!  The number was", the_number
>>> print "And it only took you", tries, "tries!\n"
>>>
>>> raw_input("\n\nPress the enter key to exit.")
>>>
>>> many Thanks
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>
>     if tries > 10:
>         print 'you failed- give up'
>         break
> <------------------- use this
>

That won't work as written, because it'll print "you failed," then
break, then print "You guessed it!"...

As an alternative to what I suggested before, if you really just want
to end the program, you could also do

from sys import exit

<rest of code>

    if tries > 10:
        print 'you failed- give up'
        exit()


From bj_666 at gmx.net  Mon May  5 01:14:47 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 5 May 2008 05:14:47 GMT
Subject: Truncate beginning of a file
References: <1bc92095-41ab-404a-a697-088545cdddec@27g2000hsf.googlegroups.com>
Message-ID: <687je7F2rh7pkU1@mid.uni-berlin.de>

On Sun, 04 May 2008 22:06:42 -0700, s0suk3 wrote:

> file.truncate(X) will truncate the file to at most X bytes (i.e. leave
> the first X bytes of the file and throw away the rest). Is there a way
> to throw away, say, the first X bytes of the file, and leave the rest?
> (Without opening the same file for reading, reading and processing,
> overwriting the file with the new processed data, etc.)

No.

Ciao,
	Marc 'BlackJack' Rintsch


From badmuthahubbard at gmail.com  Thu May  8 17:30:28 2008
From: badmuthahubbard at gmail.com (Chuckk Hubbard)
Date: Fri, 9 May 2008 00:30:28 +0300
Subject: Python GUIs and custom controls
In-Reply-To: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <8200bab70805081430w59b7b0c5r814b3f6cab112629@mail.gmail.com>

I likewise don't know enough to compare between toolkits, but another
one to check out might be pygame.  If nothing else, it is meant to be
fast and to handle 3D views.

-Chuckk

On Fri, May 9, 2008 at 12:10 AM, Joe P. Cool <joe.p.cool at googlemail.com> wrote:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.
>
> Joe
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.badmuthahubbard.com


From unknown_hero007 at hotmail.com  Wed May  7 01:31:49 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Tue, 6 May 2008 22:31:49 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
Message-ID: <de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>

Tim Golden wrote:

> Well, I attach a kind of explanatory Noddy example I wrote a few years ago
> for someone on the python-win32 list. I think, glancing over it, that it includes
> what you need to know, although not necessarily in the right order. I'm happy to
> explain if things aren't clear:
>
> <code>
> import _winreg
>
> HKLM = _winreg.HKEY_LOCAL_MACHINE
>
> #
> # Set up a registry subtree under HKLM\Software
> # which will look like this:
> #
>
> #
> # TimSoft
> # |
> # +-- App1
> # |
> # +-- App2
> # |
> # +-- App3
> #
>
> #
> # The [TimSoft] key has a default (ie unnamed) value
> # while the Appx keys each have two values:
> # ? [Registered] - a string Y/N value
> # ? [Version] - a DWORD value
> #
>
> hSoftware = _winreg.OpenKey (HKLM, "Software")
> hTimSoft = _winreg.CreateKey (hSoftware, "TimSoft")
>
> _winreg.SetValueEx (hTimSoft, None, 0, _winreg.REG_SZ, "All Tim's Software")
>
> hApp1 = _winreg.CreateKey (hTimSoft, "App1")
> _winreg.SetValueEx (hApp1, "Version", 0, _winreg.REG_DWORD, 101)
> _winreg.SetValueEx (hApp1, "Registered", 0, _winreg.REG_SZ, "Y")
>
> hApp2 = _winreg.CreateKey (hTimSoft, "App2")
> _winreg.SetValueEx (hApp2, "Version", 0, _winreg.REG_DWORD, 202)
> _winreg.SetValueEx (hApp2, "Registered", 0, _winreg.REG_SZ, "N")
>
> hApp3 = _winreg.CreateKey (hTimSoft, "App3")
> _winreg.SetValueEx (hApp3, "Version", 0, _winreg.REG_DWORD, 303)
> _winreg.SetValueEx (hApp3, "Registered", 0, _winreg.REG_SZ, "Y")
>
> #
> # NB - no need to do an explicit "write": the Registry uses
> # ?some sort of caching which eventually catches up with itself,
> # ?so unless you plan to turn the machine off soon, don't
> # ?bother with FlushKey or anything like that.
> #
>
> #
> # Now we start again, as though we were just querying
> #
>
> hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
> n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey (hTimSoft)
> print n_sub_keys, "sub keys", n_values, "values", last_modified, "nanoseconds since 1600!"
>
> #
> # Pick up the default value: really should try to
> # ?interpret the default_type to determine if it's
> # ?a number or a string or whatever, but...
> #
> default_value, default_type = _winreg.QueryValueEx (hTimSoft, None)
> print "Default value:", default_value
>
> #
> # Now, in this case I know (because I created them) that
> # ?the TimSoft key has three subkeys, each of which has
> # ?two values. But if I didn't...
> #
> print
> for i in range (n_sub_keys):
> ? subkey_name = _winreg.EnumKey (hTimSoft, i)
> ? print subkey_name
>
> #
> # Alternatively, if I hadn't done the QueryInfoKey above...
> #
> i = 0
> print
> while 1:
> ? try:
> ? ? subkey_name = _winreg.EnumKey (hTimSoft, i)
> ? except EnvironmentError:
> ? ? break
> ? else:
> ? ? print subkey_name
> ? ? i += 1
>
> #
> # Now, let's use the last key as an example
> # ?and pick out its values.
> #
> print
> print subkey_name
> hAppKey = _winreg.OpenKey (hTimSoft, subkey_name)
> i = 0
> while 1:
> ? try:
> ? ? name, value, type = _winreg.EnumValue (hAppKey, i)
> ? ? print name, value, type
> ? except EnvironmentError:
> ? ? break
> ? else:
> ? ? print " ?%s => %s (type %s)" % (name, value, type)
> ? ? i += 1
>
> </code>
>
> TJG

Correct me if I'm wrong (which I just might be), but doesn't the above
code go through the keys behind HKEY_LOCAL_MACHINE\Software\Timsoft\ ?

Is it possible to use an empty value in:

  hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")

like:

  hTimSoft = _winreg.OpenKey (HKLM, "")

so it would go all subkeys behind the "root" (in this case,
HKEY_LOCAL_MACHINE)?


The code is supposed to work even if I don't know all possible subkeys
under HKEY_LOCAL_MACHINE. Creating dozens or hundreds of handles like
the above is a bit... unappealing.

Can I also use HKLM in the place of hTimSoft when I want to determine
the amount of subkeys it has, like you did over here:

  n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey
(hTimSoft)


Anyway, the above code seems interesting. I'll try a few tweaks here
and there and see what happens.

Thank you, Tim.


From rong889 at gmail.com  Tue May 13 00:48:50 2008
From: rong889 at gmail.com (rong889 at gmail.com)
Date: Mon, 12 May 2008 21:48:50 -0700 (PDT)
Subject: Chinese names in Python source
References: <72f078a8-a9e3-4b1c-8f21-ea5633654672@b5g2000pri.googlegroups.com>
Message-ID: <1fcff13f-d31f-4b89-8739-1263a4bfbb73@z24g2000prf.googlegroups.com>

On 5?13?, ??11?36?, "kirby.ur... at gmail.com" <kirby.ur... at gmail.com>
wrote:
> It's probably not news to anyone here that Python 3 gives us
> access to the unicode codespace for Python names, not just
> string literals, meaning our functions and classes, lists and
> dictionaries, might go outside Latin-1 for their source code
> representation.
>
> I have an example in my blog:http://mybizmo.blogspot.com/2008/05/chinese-names-in-python.html
>
> If others have Python source with names in other languages,
> that might be fun to see.  Images are probably better than actual
> source code, as it's up to the font library to render unicode
> properly and many Python text editors aren't prepared to render
> all these characters (yet).
>
> I used lucidabright in IDLE for my screen shot (Ubuntu 8.4 laptop).
>
> Kirby
> Portland, OR

.........................................
http://cashpickup.net


From ivan.illarionov at gmail.com  Mon May 26 04:47:33 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 26 May 2008 08:47:33 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<Vv6dnQEnHcw7SKTVnZ2dnUVZ_hGdnZ2d@comcast.com>
	<mailman.1598.1211789506.12834.python-list@python.org>
Message-ID: <g1dtf5$225p$1@news.mtu.ru>

On Mon, 26 May 2008 10:11:22 +0200, Max M wrote:

> Jerry Stuckle skrev:
>> Ivan Illarionov wrote:
> 
>> I repeat.  The language has nothing to do with it.  Good programmers
>> write good code.  Lousy programmers write bad code.
> 
> That is simply not true!
> 
> The languag has a lot to do with what you can do in any given time.
> 
> You can write good code in a bad language. But it will take lot more
> time. And so it will not be done.
> 
> Your argument, if it was true, would mean that I could just as well
> write a blog in c or even assembler, and still write optimal code.
> 
> 
> php is a terrible language and I cringe whenever I have to use it. In
> fact I have turned down many jobs because they were written in php. It
> is simply to frustrating.

I want to cite Paul Graham on this topic:

"it's all based on one unspoken assumption, and that assumption turns out 
to be false. The pointy-haired boss believes that all programming 
languages are pretty much equivalent. If that were true, he would be 
right on target. If languages are all equivalent, sure, use whatever 
language everyone else is using.

But all languages are not equivalent, and I think I can prove this to you 
without even getting into the differences between them. If you asked the 
pointy-haired boss in 1992 what language software should be written in, 
he would have answered with as little hesitation as he does today. 
Software should be written in C++. But if languages are all equivalent, 
why should the pointy-haired boss's opinion ever change? In fact, why 
should the developers of Java have even bothered to create a new language?

Presumably, if you create a new language, it's because you think it's 
better in some way than what people already had. And in fact, Gosling 
makes it clear in the first Java white paper that Java was designed to 
fix some problems with C++. So there you have it: languages are not all 
equivalent. If you follow the trail through the pointy-haired boss's 
brain to Java and then back through Java's history to its origins, you 
end up holding an idea that contradicts the assumption you started with.

So, who's right? James Gosling, or the pointy-haired boss? Not 
surprisingly, Gosling is right. Some languages are better, for certain 
problems, than others. And you know, that raises some interesting 
questions. Java was designed to be better, for certain problems, than C+
+. What problems? When is Java better and when is C++? Are there 
situations where other languages are better than either of them?"
and so on at
http://www.paulgraham.com/icad.html

I tend to share PG's opinions on the subject (though I think that Python 
is superior to Lisp :-).

The argument that "the language has nothing to do with it" is an old  
pointy-haired boss argument. I doubt that a person who think this way can 
be a really good programmer.

Ivan


From dmitrey.kroshko at scipy.org  Sun May 18 07:09:56 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Sun, 18 May 2008 04:09:56 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<5P6dnTMRFrUXL7LVnZ2dnUVZ_uSdnZ2d@earthlink.com>
	<092bbffb-3325-45d4-9714-0dd1fba2ea82@k1g2000prb.googlegroups.com>
Message-ID: <e3afbc1c-d353-4bad-9411-c33bc084c14b@l64g2000hse.googlegroups.com>

Along with numpy & scipy there is some more Python scientific soft
worse to be mentioned:

http://scipy.org/Topical_Software
http://pypi.python.org/pypi?:action=browse&show=all&c=385

On 18 ???, 06:25, Henrique Dante de Almeida <hda... at gmail.com> wrote:
> once I
> looked for linear programming toolkits for python and IIRC, I only
> could find a trivial wrapper for glpk (called pulp).

You could be interested in OpenOpt, it has connections to LP solvers
glpk, cvxopt's one and lp_solve (former & latter allows handling MILP
as well)

http://scipy.org/scipy/scikits/wiki/LP


From johnjsal at NOSPAMgmail.com  Wed May 14 22:30:33 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 14 May 2008 22:30:33 -0400
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
Message-ID: <20080514223033.0ec9fff0.johnjsal@NOSPAMgmail.com>

On Tue, 13 May 2008 08:24:35 -0700 (PDT)
Dave Parker <daveparker at flamingthunder.com> wrote:

> I think that many people will find that Flaming Thunder is easier to
> use and understand than Python

I respectfully disagree.

> Plus, me getting paid to work on Flaming Thunder is far more
> motivating than me not getting paid to work on Python.

That's truly disappointing.

> This weekend,
> Python users will still be debating how to fix awkwardnesses in the
> languages (such as FOR loops where you're just counting the loops and
> not referencing the loop variable) -- but Flaming Thunder users will
> be getting work done using the REPEAT n TIMES constructs that I'll be
> implementing.

FT seems like all "awkwardnesses" to me.


From http  Wed May 21 18:44:39 2008
From: http (Paul Rubin)
Date: 21 May 2008 15:44:39 -0700
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <7xwslnwa3s.fsf@ruckus.brouhaha.com>

notbob <notbob at nothome.com> writes:
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?

php is very easy to get started with and some big sites have been
written in it.  There is lots of low cost php hosting available.  It
is not as good a language as Python.  However, Python's advantages are
strongest in more complex projects.  For simple stuff, php is frankly
less hassle just because of its wide deployment and that extensive
function library that the blog post your quoted described as a bad
thing.  Python's libraries are not bad, but php's are more intensely
focused on web apps and includes what you need as part of the standard
build.  With Python, if you want a database adapter or web template
framework, you have to choose between a bunch of different ones and
download and configure it which often involves head scratching when
the auto-install stuff hits some quirk of your system.  With php, it's
all right there when you flip the switch.

Knowing lots of languages is good for you.  php is probably your
quickest route to getting a rudimentary web app running.  Python
is a longer term project.  Do both.


From stef.mientki at gmail.com  Sat May 24 08:15:39 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 14:15:39 +0200
Subject: SQLite import fails sometimes ?
In-Reply-To: <4837f7d1$1@news.mel.dft.com.au>
References: <mailman.1520.1211623228.12834.python-list@python.org>
	<4837f7d1$1@news.mel.dft.com.au>
Message-ID: <483806EB.50007@gmail.com>

John Machin wrote:
> Stef Mientki wrote:
>> hello,
>>
>> The import statement "import sqlite3" gives the error given below.
>> In simple programs, the import statement (sometimes) succeed,
>> and I can indeed access the database.
>> So I guess there is some conflict with another part of my program,
>> but as the program is rather large (and dynamic) it's not easy to 
>> isolate the problem.
>> Does anyone has a clue how to trace this kind of problem ?
>>
>> thanks,
>> Stef
>>
>> Traceback (most recent call last):
>>  File "bricks\brick.py", line 322, in Exec
>>    self.Generate_Output_Signals ()
>>  File "bricks\brick_dBase.py", line 61, in Generate_Output_Signals
>>    import sqlite3
>>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
>
> Is P: a network drive? If not, what is it?
P is just a normal local drive,
> I presume from the fact that the next part of the path is not 
> \Python25\Lib that you have not performed a default installation; 
> other than the changes to the path name, what else have you done?
Indeed, the only thing I've changed is the pathname.
I also installed

    * install python  2.5.2 msi
    * install numpy  1.0.4
    * install scipy  0.6.0
    * install wxPython + docs-demo  2.8.7.1 unicode
    * install MatPlotLib  0.91.2
    * install Pygame + docs  1.8.0
    * install SendKeys  0.3
    * install PyScripter  1.7.2 ,  updated to 1.9.9.1 !!!
    * install Rpyc  3.0
    * install ConfigObj  4.5.2 ,  unpack in sitelibs and run  "python 
      setup.py  install"

I don't know if this matters, but I also use sqlite3 from other than 
Python programs.

> What version of Python are you using? What version of Windows?
Windows-XP - sp2
>
>>    from dbapi2 import *
>>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>>    from _sqlite3 import *
>> ImportError: DLL load failed: Invalid access to memory location.
>
> Looks like the problem could be with your copy of _sqlite3.pyd (pyd == 
> Python DLL)
>
> Try why I did below and tell us how far you got.
> Cheers,
> John
>
> === try this ===
> C:\junk>python
> Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from _sqlite3 import *
> >>> import _sqlite3
> >>> _sqlite3.__file__
> 'c:\\python25\\DLLs\\_sqlite3.pyd'
> === end ===
==== looks identical to me  ====
C:\Documents and Settings\Administrator>python
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> from _sqlite3 import *
 >>> import _sqlite3
 >>> _sqlite3.__file__
'P:\\Python\\DLLs\\_sqlite3.pyd'
==== end =====

Any other suggestions ?

thanks,
Stef


> -- 
> http://mail.python.org/mailman/listinfo/python-list



From cokofreedom at gmail.com  Wed May  7 10:15:48 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 7 May 2008 07:15:48 -0700 (PDT)
Subject: comparing dictionaries
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <1f15edf4-5e0b-4faa-a0ae-d1a02ec0d201@x41g2000hsb.googlegroups.com>

On May 7, 4:08 pm, brad <byte8b... at gmail.com> wrote:
> I want to compare two dicts that should have identical info just in a
> different data structure. The first dict's contents look like this. It
> is authoritative... I know for sure it has the correct key value pairs:
>
> {'001' : '01'}
>
> The second dict's contents are like this with a tuple instead of a
> string for the key:
>
> {('This is one', '001'): '01'}
>
> Pseudo Code:
> for key, value in first_dict.iteritems():
>    # How do I do the following line?
>    if key not in second_dict or if it is, but has has the wrong value,
> then let me know

Well

for k, v in first_dict.items():
  if k not in second_dict or k in second_dict and k[v] !=
second_dict[k]:
    let you know?


From python at bdurham.com  Fri May  2 09:17:18 2008
From: python at bdurham.com (python at bdurham.com)
Date: Fri, 02 May 2008 09:17:18 -0400
Subject: Best way to store config or preferences in a multi-platform way
Message-ID: <1209734238.24342.1251068097@webmail.messagingengine.com>

Lance,

> I am still undecided if the ability for the user to edit the file independently of the program is a good or bad thing.

I prefer user viewable plain (non-XML) text files because:

- easy to make a change in case of emergency
- easy to visually review and search
- easy to version control, diff, and optionally spellcheck
- easy to translate
- easy to generate programmatically
- less opportunity for corruption
- best compression

IMO, the 3 biggest advantages are:
- easy to make field changes in case of emergency
- diff
- less opportunity for corruption

Interesting thread. I'm looking forward to hearing what others say on
this topic.

Regards,
Malcolm 


From andrej.panjkov at climatechange.qld.gov.au  Thu May  8 21:57:03 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Thu, 8 May 2008 18:57:03 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com> 
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
Message-ID: <bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>

On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:

>
> No, no, no, no, no!
>

Geez.  Go easy.

> You have got it entirely wrong here. Your XOR function simply returns a
> function which gives you the result of xoring the parameters AT THE TIME
> WHEN YOU ORIGINALLY CREATED IT. I'm guessing that you had already set
> cream and icecream (otherwise the call to XOR would have thrown an
> exception) and at leas one was true. Try setting them both False at the
> beginning:
>
> >>> cream = False
> >>> icecream = False
> >>> topping = XOR( cream, icecream)
> >>> cream = True
> >>> icecream = False
> >>> print topping()
>
> False
>

Ok. I understand this better now.  I did say I found the documentation
rather terse on this.

> Using a lambda was a completely pointless exercise here, you could have
> just returned the result directly:


If I try out a new language, I try to exercise those parts of the
language that are new to me.  Now I saw lambdas, an interesting
structure I hadn't seen before. So I tried them out.  I get to learn a
little at the same time as scripting.  That was the "point".  I only
get to optimise my use of a language by trying out various corners of
it.

> def TFF(x,y,z) :
>   return x and not y and not z
>
> AddOnly = TFF( options.AddAction, options.ReplaceAction,
> options.DeleteAction )
> DeleteOnly = TFF( options.DeleteAction, options.AddAction,
> options.ReplaceAction )
> ReplaceOnly = TFF( options.ReplaceAction, options.AddAction,
> options.DeleteAction )
>
> if not (DeleteOnly or AddOnly or ReplaceOnly):
>   print "Error:  Exactly one of  [ --add | --replace | --delete ]
> allowed. "
>   parser.print_help()
>   exit
>
> which boils down to:
>
> if (options.AddAction + options.ReplaceAction +
>         options.DeleteAction) != 1:
>     print "Error: ..."

Indeed, there are many ways this could be done.  Some are more
concise, some are more efficient.  As I said, I did it the way I did
it to try out lambdas.  Your way achieves the result, rather elegantly
I think, but teaches me nothing about using lambdas.

Pardon my tetchiness, but it is a little hard to receive such blunt
and inflexible replies to my posts.

Both the responses offer lambda free alternatives.  That's fine, and
given the terse documentation and problems that I had understanding
them, I would agree.  So what applications are lambdas suited to?  I
think the parameterised function model is one.
What else?


From gherron at islandtraining.com  Thu May 15 12:51:22 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 May 2008 09:51:22 -0700
Subject: How do I use the unpack function?
In-Reply-To: <BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
References: <BAY135-W35716A2867EB3F146E95E49FC90@phx.gbl>	<482C60AB.2060406@islandtraining.com>
	<BAY135-W3555EC7D58E90CEDBF98B59FC90@phx.gbl>
Message-ID: <482C6A0A.8080308@islandtraining.com>

Marlin Rowley wrote:
> Thanks for the advice!
>  
> However, I assumed that:
>  
> fourbytes = pixelComponent[:4]
>  
> would shave that byte off the array in pixelComponent.  So that the 
> array is smaller by one on the next iteration.  Is this not the case?
You don't need the newsgroup to answer this kind of question.  Just try it!

 >>> a = 'abcdefghi'
 >>> b = a[:4]
 >>> print a,b
abcdefghi abcd

Notice that the [:4] index does not change the original array.

Gary Herron



>  
> I'm getting weird results now..
>  
> -M
>
>
>
>
> ------------------------------------------------------------------------
>
> > Date: Thu, 15 May 2008 09:11:23 -0700
> > From: gherron at islandtraining.com
> > To: marlin_rowley at hotmail.com
> > CC: python-list at python.org
> > Subject: Re: How do I use the unpack function?
> >
> > Marlin Rowley wrote:
> > > All:
> > >
> > > I've got a script that runs really slow because I'm reading from a
> > > stream a byte at a time:
> > >
> > > // TERRIBLE
> > > for y in range( height ):
> > > for color in range(4):
> > > for x in range( width ):
> > > pixelComponent = fileIO.read(4)
> > > buffer = unpack("!f",pixelComponent) << unpacks ONE
> > > float, but we now can do something with that pixel component.
> > >
> > >
> > > I can speed this up dramatically if I did this:
> > >
> > > // MUCH FASTER
> > > for y in range( height ):
> > > for color in range(4):
> > > pixelComponent = fileIO.read(4*width) <<<<<<<<< GET a LOT more
> > > data from the stream into memory FIRST!!
> > > for x in range( width ):
> > > buffer = unpack( ?????? ) <<<< how do I get each float from
> > > the pixelComponent???
> >
> > Just carve of the first four bytes of pixelComponent on each pass
> > through the loop, and unpack that.
> >
> > for x in range(width):
> > fourbytes = pixelComponent[:4] # first 4 bytes
> > pixelComponent = pixelComponent[4:] # All but first four bytes
> > buffer = unpack("!f", fourbytes)
> >
> >
> > There are probably better ways overall, but this directly answers your
> > question.
> >
> > Gary Herron
> >
> >
> > >
> > >
> > > -M
> > > 
> ------------------------------------------------------------------------
> > > With Windows Live for mobile, your contacts travel with you. Connect
> > > on the go.
> > > 
> <http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_Refresh_mobile_052008> 
>
> > >
> > > 
> ------------------------------------------------------------------------
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> ------------------------------------------------------------------------
> Get Free (PRODUCT) RED? Emoticons, Winks and Display Pics. Check it 
> out! 
> <http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From alastair.graham at gmail.com  Mon May 12 15:50:04 2008
From: alastair.graham at gmail.com (JustMe)
Date: Mon, 12 May 2008 12:50:04 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
Message-ID: <f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>

On 12 May, 20:02, Mensanator <mensana... at aol.com> wrote:
> On May 12, 12:27 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
>
> > Just something that crosses my mind every time I delve into "Learning
> > Python" each night. Does anyone see any value in learning Python when you
> > don't need to for school, work, or any other reason?

I'm in the same boat. My work seems fixated with .Net but IMHO I think
they would be better off going with Python. Still, who am I to stand
in the way of hundreds of .Net programmers.

However, learning Python in the evening for the hell of it has led me
to investigate Linux, which in turn has made me find out reams more
stuff about computing than I knew before. So I've learnt a new
programming language (albeit at a fairly basic level), installed a new
OS and started looking into setting up home servers. None of it is
spectacular, but it wouldn't have happened if I hadn't just thought
"What the hell, I'll just learn it anyway"


From castironpi at gmail.com  Thu May  8 20:13:08 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:13:08 -0700 (PDT)
Subject: Python Syntax and misspelled variable and method name checker?
References: <mailman.799.1210269536.12834.python-list@python.org> 
	<68gtogF2sujboU1@mid.uni-berlin.de>
Message-ID: <000b6c98-41dc-46c0-97b6-02af5f3a4825@25g2000hsx.googlegroups.com>

On May 8, 1:06?pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> neerashish schrieb:
>
>
>
> > Is there a good Python Syntax and mis-spelled variable and method name
> > checker available.
>
> > I have been programming in python for last 6 months and misspelled variables
> > and method names have been bane of my python life.
>
> > In complied languages, compiler checks for these mistakes. I come from Java
> > , C++ background.
>
> > I use komodo as editor on mac. I use python 2.4
>
> > Please suggest some good tool and utilities.
>
> Try pylint, pychecker and the commercial version of pydev.
>
> Diez

Why is it integral to Python?


From cwitts at gmail.com  Wed May 28 05:22:04 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 28 May 2008 02:22:04 -0700 (PDT)
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <c23adf49-c644-4ae0-8724-d0a2c91fb430@k30g2000hse.googlegroups.com>

On May 28, 11:08?am, dave_140... at hotmail.com wrote:
> Hi,
>
> I have problems getting my Python code to work with UTF-8 encoding
> when reading from stdin / writing to stdout.
>
> Say I have a file, utf8_input, that contains a single character, ?,
> coded as UTF-8:
>
> ? ? ? ? $ hexdump -C utf8_input
> ? ? ? ? 00000000 ?c3 a9
> ? ? ? ? 00000002
>
> If I read this file by opening it in this Python script:
>
> ? ? ? ? $ cat utf8_from_file.py
> ? ? ? ? import codecs
> ? ? ? ? file = codecs.open('utf8_input', encoding='utf-8')
> ? ? ? ? data = file.read()
> ? ? ? ? print "length of data =", len(data)
>
> everything goes well:
>
> ? ? ? ? $ python utf8_from_file.py
> ? ? ? ? length of data = 1
>
> The contents of utf8_input is one character coded as two bytes, so
> UTF-8 decoding is working here.
>
> Now, I would like to do the same with standard input. Of course, this:
>
> ? ? ? ? $ cat utf8_from_stdin.py
> ? ? ? ? import sys
> ? ? ? ? data = sys.stdin.read()
> ? ? ? ? print "length of data =", len(data)
>
> does not work:
>
> ? ? ? ? $ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
> ? ? ? ? length of data = 2
>
> Here, the contents of utf8_input is not interpreted as UTF-8, so
> Python believes there are two separate characters.
>
> The question, then:
> How could one get utf8_from_stdin.py to work properly with UTF-8?
> (And same question for stdout.)
>
> I googled around, and found rather complex stuff (see, for example,http://blog.ianbicking.org/illusive-setdefaultencoding.html), but even
> that didn't work: I still get "length of data = 2" even after
> successively calling sys.setdefaultencoding('utf-8').
>
> -- dave

weird thing is 'c3 a9' is ?? on my side... and copy/pasting the ?
gives me 'e9' with the first script giving a result of zero and second
script gives me 1


From grante at visi.com  Fri May 30 11:57:43 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 30 May 2008 10:57:43 -0500
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
	<87skw0s0jj.fsf@physik.rwth-aachen.de>
Message-ID: <8LydnV1nb4Rqvt3VnZ2dnUVZ_gCdnZ2d@posted.visi>

On 2008-05-30, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
> Duncan Booth writes:
>
>> [...]
>>
>> I don't understand your problem: it's just a single thread so
>> killfile or skip it.
>
> Although I agree with you that there is no problem, *this* is not a
> good justification for this thread.  One should stay on topic in
> *every* thread.

I've noticed that a lot of things that should be, aren't.

The percentage of off-topic threads in c.l.p is extraordinarily
low by normal Usenet standards.  One oughtn't complain about it
lest one jinx things and reduce c.l.p to the state of the rest
of Usenet. 

I wouldn't even consider the thread all that OT, but maybe
that's just me.

-- 
Grant Edwards                   grante             Yow! !  Everybody out of
                                  at               the GENETIC POOL!
                               visi.com            


From arnodel at googlemail.com  Thu May 15 02:17:19 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 07:17:19 +0100
Subject: Passing functions around and executing
References: <20fafcf9-a311-4f9e-ad61-ee8be2e1d4f6@y21g2000hsf.googlegroups.com>
	<db5e55ac-5e91-40c8-8bdb-e573436a986c@l17g2000pri.googlegroups.com>
Message-ID: <m2fxsk9jm8.fsf@googlemail.com>

alex23 <wuwei23 at gmail.com> writes:

> On May 15, 10:53 am, PatrickMinnesota <PatrickMinnes... at gmail.com>
> wrote:
>> I have a bunch of functions.  I want to put them in a list.  Then I
>> want to pass that list into another function which does some setup and
>> then loops through the list of passed in functions and executes them.
>> Some of them need arguments passed in too.
>
> Hey Patrick,
>
> Is something like the following helpful?
>
>>>> def fn1(): print 'fn1'
>>>> def fn2(): print 'fn2'
>>>> fn_list = [fn1, fn2]
>>>> def process(fn_seq):
> ...     # do set up here
> ...     for fn in fn_list:
> ...         fn()
>
>>>> process(fn_list)
> fn1
> fn2
>
> The easiest way to extend this for optional argument passing would be
> to have each function accept keyword arguments, and then to pass a
> dictionary of arguments in to each:
>
Or you could wrap your functions in functools.partial:

def foo(n):
    return 'x'*n

>>> from functools import partial
>>> foo10 = partial(foo, 10)
>>> print foo10()
xxxxxxxxxx

HTH

-- 
Arnaud


From darcy at druid.net  Fri May 16 11:42:57 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 16 May 2008 11:42:57 -0400
Subject: writing python extensions in assembly
In-Reply-To: <wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>
	<mailman.1229.1210949533.12834.python-list@python.org>
	<wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
Message-ID: <20080516114257.b56d718e.darcy@druid.net>

On Fri, 16 May 2008 11:21:39 -0400
"inhahe" <inhahe at gmail.com> wrote:
> You could be right, but here are my reasons.
> 
> I need to make something that's very CPU-intensive and as fast as possible. 
> The faster, the better, and if it's not fast enough it won't even work.
> 
> They say that the C++ optimizer can usually optimize better than a person 
> coding in assembler by hand can, but I just can't believe that, at least for 
> me, because when I code in assembler, I feel like I can see the best way to 
> do it and I just can't imagine AI would even be smart enough to do it that 
> way...

Perhaps.  Conventional wisdom says that you shouldn't optimize until
you need to though.  That's one of the benefits of the way Python
works.  Here's how I would do it.

1. Write the code (call it a prototype) in pure Python.  Make sure that
everything is modularized based on functionality.  Try to get it split
into nice, bite size chunks.  Make sure that you have unit tests for
everything that you write.

2. Once the code is functioning, benchmark it and find the
bottlenecks.  Replace the problem methods with a C extension.  Refactor
(and check your unit tests again) if needed to break out the problem
areas into as small a piece as possible.

3.  If it is still slow, embed some assembler where it is slowing down.

One advantage of this is that you always know if your optimizations are
useful.  You may be surprised to find that you hardly ever need to go
beyond step 1 leaving you with the most portable and easily maintained
code that you can have.

> For portability, I'd simply write different asm routines for different 
> systems.  How wide a variety of systems I'd support I don't know.  As a bare 
> minimum, 32-bit x86, 64-bit x86, and one or more of their available forms of 
> SIMD.

Even on the same processor you may have different assemblers depending
on the OS.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From tjreedy at udel.edu  Wed May 21 15:48:58 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 May 2008 15:48:58 -0400
Subject: getting dir(x), but not as list of strings?
References: <YyQYj.5006$nW2.2443@nlpi064.nbdc.sbc.com>
	<48344323.1040401@islandtraining.com>
Message-ID: <g11ub7$pb9$1@ger.gmane.org>


"Gary Herron" <gherron at islandtraining.com> wrote in message 
news:48344323.1040401 at islandtraining.com...
| mh at pixar.com wrote:
| > I want to iterate over members of a module, something like:
| >
| >     for i in dir(x):
| >         if type(i) == types.FunctionType: ...
| >
| > but of course dir() returns a list of strings.  If x is a module,
| > how can I get the list of its members as their actual types?
| >
| > Many TIA!
| > Mark
| >
| >
| Use the builtin vars to get a dictionary of names and associated objects.
|
| import sys
| for name,ob in vars(sys).items():
|  print name,type(ob)

This also works on classes, but apparently not on most other objects. 





From lists at cheimes.de  Wed May  7 17:31:19 2008
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 07 May 2008 23:31:19 +0200
Subject: subprocess wait() waits forever, but os.system returns
In-Reply-To: <27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>
References: <84a23679-56e2-41b5-83eb-741a696095da@59g2000hsb.googlegroups.com>	<mailman.723.1210193322.12834.python-list@python.org>
	<27830e9e-cfc4-45a3-99da-94cb17bb1720@r66g2000hsg.googlegroups.com>
Message-ID: <fvt737$4js$1@ger.gmane.org>

grayaii schrieb:
> Awesome! That worked!
> And your comment just led me down another exploration path on why the
> following doesn't work:
> ---------------------
> while(returncode is None):
> 	returncode = run.poll()
> 	time.sleep(1)
> 
> out = run.stdout.readlines()
> err = run.stderr.readlines()
> ---------------------
> Nowhere in the loop am I reading stdout or err.
> I'm only reading it after the loop has finished, and when running the
> exe, returncode is *always* None.
> Now I have to figure out a way to read it within the loop without
> blocking the read... on Windows...

the subprocess has already a canonical way:

out, err = run.communicate()

Your code may still block if the stderr buffer is full during the
stdout.readlines() call.

Christian



From bruno.42.desthuilliers at websiteburo.invalid  Thu May 15 10:04:23 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 15 May 2008 16:04:23 +0200
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <482c42d9$0$9669$426a34cc@news.free.fr>

castironpi a ?crit :
> Why can't I write this?

Because one or more of the "t", "h", "i", "s" keys are missing from your 
keyboard ?


From nishant.deshpande at gmail.com  Mon May  5 22:27:03 2008
From: nishant.deshpande at gmail.com (nishant.deshpande at gmail.com)
Date: Mon, 5 May 2008 19:27:03 -0700 (PDT)
Subject: notification of file truncate
Message-ID: <f37948f6-45af-41f7-a6d1-cfbf8b81e3b8@l17g2000pri.googlegroups.com>

hi,

I am running ubuntu 7.1 (linux 2.6.22-12-generic)

i was trying to implement 'tail -f' (well tail -F actually but for
this example i think its not relevent) and one of the features which i
couldn't get in python was notification of truncation of a file.

i looked at the inotify (the pyinotify package) and then the linux
inotify functionality.

i don't see the truncation notification anywhere... yet tail -F
notifies that the file has been truncated and repositions its offset
at top of the file to print out the next lines.

can anyone shed some light on this? i guess i need to look at the bash
tail code..







From NikitaTheSpider at gmail.com  Mon May 19 10:59:20 2008
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Mon, 19 May 2008 10:59:20 -0400
Subject: is there a bug in urlunparse/urlunsplit
References: <09764c57-03ce-4ccb-a26d-e851899dcc7c@a23g2000hsc.googlegroups.com>
Message-ID: <NikitaTheSpider-9134B1.10592019052008@johnf2.biosci.ohio-state.edu>

In article 
<09764c57-03ce-4ccb-a26d-e851899dcc7c at a23g2000hsc.googlegroups.com>,
 Alex <metallourlante at gmail.com> wrote:

> Hi all.
> 
> Is there a bug in the urlunparse/urlunsplit functions?
> Look at this fragment (I know is quite silly):
> 
> urlunparse(urlparse('www.example.org','http'))
> ---> 'http:///www.example.org'
>            ^^^^^
> 
> There are too many slashes, isn't it? Is it a known bug or maybe I
> missed something...

Hi Alex,
For a few years now I've been using Fourthought's libraries for parsing 
URLs and they've performed beautifully. In the code comments, they state 
that urlparse() and friends exhibit some non-RFCish behavior, hence the 
inspiration for writing their own libraries. 

If I remember correctly, the file you want is uri.py and it is in 4Suite 
which you can download from here:
http://www.fourthought.com/

HTH

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From cokofreedom at gmail.com  Thu May 29 08:41:11 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 29 May 2008 05:41:11 -0700 (PDT)
Subject: Tuple of coordinates
References: <d9e06642-a8f7-40e7-aa16-e7d339ee5242@f36g2000hsa.googlegroups.com>
Message-ID: <f66bb609-94fd-4f39-a7fa-f24364abddcc@m45g2000hsb.googlegroups.com>

a = 1, 2
b = 3, 4, 5
c = 6, 7, 8, 9
coord = list()

for i, j, k in zip(a, b, c):
    coord.append((i, j, k))

print coord


From aboudouvas at panafonet.gr  Mon May 12 17:24:59 2008
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 12 May 2008 14:24:59 -0700 (PDT)
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4ae5beb9-40c4-42d5-b22e-612297c7d014@f36g2000hsa.googlegroups.com>
	<f3a7f77d-e531-4f0a-9a13-bb1a5a8c885a@f63g2000hsf.googlegroups.com>
Message-ID: <b8fbefab-e21f-4568-8acd-c5863ea4b156@34g2000hsh.googlegroups.com>

Same for me here too! C# on the work, Python earning at the evening. I
am bored to death with so many .net/C# years and i wanted to learn
something different and cross platform. I think it will pay back some
time...

On May 12, 10:50 pm, JustMe <alastair.gra... at gmail.com> wrote:
> On 12 May, 20:02, Mensanator <mensana... at aol.com> wrote:
>
> I'm in the same boat. My work seems fixated with .Net but IMHO I think
> they would be better off going with Python. Still, who am I to stand
> in the way of hundreds of .Net programmers.
>
> However, learning Python in the evening for the hell of it has led me
> to investigate Linux, which in turn has made me find out reams more
> stuff about computing than I knew before. So I've learnt a new
> programming language (albeit at a fairly basic level), installed a new
> OS and started looking into setting up home servers. None of it is
> spectacular, but it wouldn't have happened if I hadn't just thought
> "What the hell, I'll just learn it anyway"



From umpsumps at gmail.com  Wed May  7 12:39:50 2008
From: umpsumps at gmail.com (umpsumps at gmail.com)
Date: Wed, 7 May 2008 09:39:50 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
Message-ID: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>

Hello,

Here is my code for a letter frequency counter.  It seems bloated to
me and any suggestions of what would be a better way (keep in my mind
I'm a beginner) would be greatly appreciated..

def valsort(x):
	res = []
	for key, value in x.items():
		res.append((value, key))
	return res

def mostfreq(strng):
	dic = {}
	for letter in strng:
		if letter not in dic:
			dic.setdefault(letter, 1)
		else:
			dic[letter] += 1
	newd = dic.items()
	getvals = valsort(newd)
	getvals.sort()
	length = len(getvals)
	return getvals[length - 3 : length]

thanks much!!


From victorsubervi at gmail.com  Tue May 13 14:10:21 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Tue, 13 May 2008 22:40:21 +0430
Subject: Custom Classes?
In-Reply-To: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>

I remember why I had the number with the getpic. It is because I display
several of these images on a single page, and apparently I cannot call the
same script and get more than one image from an HTML page.
Victor

On Fri, May 9, 2008 at 10:26 AM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> Okay, trying this again with everything working and no ValueError or any
> > other errors, here we go:
> >
>
>  getpic = "getpic" + str(w) + ".py"
> >
>
> Why do you *generate* the getpicNN.py? It contains always the same code,
> why don't you just use a single getpic.py?
>
> and then surf to:
> > http://whatever.url/getpic20.py?id=6&x=1
> >
>
> Why don't you post the error you get instead...? Including the complete
> exception report.
>
> Also, please re-send the link on how to post good questions to the list. I
> > cannot find it.
> >
>
> Uhm, I don't think there is something specific for this list. There is an
> article from E.S.Raymond "How to ask questions the smart way?" that you can
> find with Google
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From wdraxinger at darkstargames.de  Fri May 16 06:44:26 2008
From: wdraxinger at darkstargames.de (Wolfgang Draxinger)
Date: Fri, 16 May 2008 12:44:26 +0200
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
Message-ID: <c550g5-l5f.ln1@darkstargames.dnsalias.net>

Mike Driscoll wrote:

> Hi,
> 
> I've had this niggling issue from time to time. I want to
> create a shortcut on the user's desktop to a website that
> specifically loads Firefox even if Firefox is not the default
> browser.
> 
> I usually use COM as it allows very specific settings of the
> shortcut, such as the Working Directory and the Target Path.
> However, the following will not work for some reason:
> 
> <code>
> 
> import win32com.client
> import winshell
> 
> shell = win32com.client.Dispatch('WScript.Shell')
> userDesktop = winshell.desktop()
> 
> shortcut = shell.CreateShortCut(userDesktop +
> '\\MyShortcut.lnk') shortcut.Targetpath = r'"C:\Program
> Files\Mozilla Firefox\firefox.exe"
> https:\www.myCompanyWebsite.com\auth\preauth.php'
> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> shortcut.save()
> 
> </code>
> 
> This creates the following target path (which doesn't work):
> 
> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> \www.myCompanyWebsite.com\auth\preauth.php"
> 
> If I leave the website off, it works. If I leave the path to
> Firefox out, it works too. Is there another method I can use
> other than creating the shortcut by hand and using the shutil
> module?
> 
> Thank you for any ideas.

I see four problems:

1) you should not hardcode the backslashes ('\'), instead use
os.sep for it.

2) In URIs there are no backslashes, only forward slashes. You
coded

https:\...

which is _WRONG_. URIs are <protocoll>://<host>/<resource>, where
for some protocolls <host> is empty (file protocoll e.g.).

3) You assume, that Firefox is always installed at C:\Program
Files\Mozilla Firefox\firefox.exe
However the path largely differs from system to system. On *nix
systems you normally have all programs in $PATH, so a non full
qualified path would be sufficient. On Windows this works, too,
_IF_ the installation directory of the to be used application
get's added to the PATH environment variable.

Wolfgang Draxinger
-- 
E-Mail address works, Jabber: hexarith at jabber.org, ICQ: 134682867



From gagsl-py2 at yahoo.com.ar  Mon May  5 01:40:56 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 May 2008 02:40:56 -0300
Subject: logger output
References: <1e6846b9-67b9-4a79-9454-a528aa8aca17@j33g2000pri.googlegroups.com>
Message-ID: <op.uan12ie9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 05 May 2008 00:33:12 -0300, skunkwerk <skunkwerk at gmail.com> escribi?:

> i'm redirecting the stdout & stderr of my python program to a log.
> Tests i've done on a simple program with print statements, etc. work
> fine.  however, in my actual program i get weird output like this:
>
> 2008-05-04 20:20:44,790 DEBUG Grabbing message from queue, if any
> 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:Grabbing message from queue,
> if any
> 2008-05-04 20:20:44,790 DEBUG DEBUG:doit:DEBUG:doit:Grabbing message
> from queue, if any
> 2008-05-04 20:20:44,790 DEBUG
> DEBUG:doit:DEBUG:doit:DEBUG:doit:Grabbing message from queue, if any
>
>
> class write2Log:
> 	def write(self, x):
> 		if x!='\n':
> 			logger.debug(str(x))
>
> any ideas what might be causing the problems?  some of the messages
> being output are quite long - might this be a problem?

Try this simplified example and see by yourself:

import sys

class Write2Log:
     def write(self, x):
         sys.__stdout__.write('[%s]' % x)

sys.stdout = Write2Log()

print "Hello world!"
age = 27
name = "John"
print "My name is", name, "and I am", age, "years old."

-- 
Gabriel Genellina



From cobrocks at msn.com  Wed May 28 06:25:01 2008
From: cobrocks at msn.com (James)
Date: Wed, 28 May 2008 10:25:01 -0000
Subject: A quick question
Message-ID: <g1jbtt+bf6m@eGroups.com>

Hey everyone,

I just started using python and cant figure this out, I'm trying to 
make a program where someone types in a word and the program gives it 
back backwards.  For example if the person puts in "cat" I want the 
program to give it back as "tac" and what it does is prints out 3,2,1.  
How can I get these integers to print as letters?  This is what I have,

word = raw_input("Type a word:")
start = len(word)

for letter in range(start, 0, -1):
    print letter  




From martin.laloux at gmail.com  Sun May 25 05:09:28 2008
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: Sun, 25 May 2008 02:09:28 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
	<21fce204-a3d5-4252-b1e2-91a3fae13649@w8g2000prd.googlegroups.com>
Message-ID: <35275a85-221f-4f09-bea9-ad03cbbea6f0@m45g2000hsb.googlegroups.com>

you put your pth file in (same configuration:

/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
packages/


From ptmcg at austin.rr.com  Wed May 21 11:23:45 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 21 May 2008 08:23:45 -0700 (PDT)
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net> 
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com> 
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com> 
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
	<69ioqaF32l8buU1@mid.uni-berlin.de>
Message-ID: <4361519a-6a1c-4813-9300-5b1c9482628b@y38g2000hsy.googlegroups.com>

On May 21, 9:09?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> cokofree... at gmail.com wrote:
>
> >> And wastes time. regular expressions can become expensive to match -
> >> doing it twice might be hurtful.
>
> >> Diez
>
> > match = (my_re1.match(line) or my_re2.match(line)) or
> > my_re3.match(line)
>
> How do you know *which* of the three has matched then?
>
> Diez

Since the OP is processing alternative regexp's, he may be drifting
close to parsing territory.  Here is a pyparsing example showing how
to match one of 'n' alternatives, and then apply functional logic
depending on which expression was matched.  This example actually
shows 4 ways to address this question (in roughly increasing order of
OO-ness):
- explicit if/elif/... test on the name of the specific match to see
which alternative matched
- more Pythonic dispatch using a dict of names and corresponding
expression processing functions
- parse-time processing using pyparsing parse actions
- parse actions invoke class constructors, to return expression-
specific objects

-- Paul


from pyparsing import oneOf, Combine, Optional, Word, \
    alphas, nums, alphanums, QuotedString

# define basic expressions
sign = oneOf("+ -")
integer = Combine(Optional(sign) + Word(nums))
real = Combine(Optional(sign) + Word(nums) + "." +
Optional(Word(nums)))
name = Word(alphas,alphanums) | QuotedString("'")

# define alternates with results names
item = real("real") | integer("integer") | name("name")

print "\nUse results names to determine which pattern matched"
for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    if it.getName() == "real":
        print "Real:", (float(it[0]))
    elif it.getName() == "integer":
        print "Int:", (int(it[0]))
    else:
        print "String:", it[0]


print "\nUse dict to dispatch to type-specific functions " \
       "- more Pythonically canonical"
def processRealItem(it):
    print "Real:", (float(it[0]))

def processIntegerItem(it):
    print "Int:", (int(it[0]))

def processNameItem(it):
    print "String:", it[0]

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    {"real"    : processRealItem,
     "integer" : processIntegerItem,
     "name"    : processNameItem }[it.getName()](it)


print "\nMove expression-specific logic into parse-time parse actions"
def convertInt(t):
    return int(t[0])
def convertReal(t):
    return float(t[0])
integer.setParseAction(convertInt)
real.setParseAction(convertReal)
item = real("real") | integer("integer") | name("name")

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    print "%s: %s %s" % (it.getName(), it[0], type(it[0]))


print "\nUse class constructors as parse-time parse actions " \
      "- results names no longer needed"
class IntObject(object):
    def __init__(self,t):
        self.type, self.value = "Int", int(t[0])
class RealObject(object):
    def __init__(self,t):
        self.type, self.value = "Real", float(t[0])
class StringObject(object):
    def __init__(self,t):
        self.type, self.value = "String", t[0]
integer.setParseAction(IntObject)
real.setParseAction(RealObject)
name.setParseAction(StringObject)
item = real | integer | name

for it in item.searchString("abc 123 -3.14 'phase of the moon'"):
    print "%s: %s (%s)" % (it[0].type, it[0].value,
it[0].__class__.__name__)


Prints:

Use results names to determine which pattern matched
String: abc
Int: 123
Real: -3.14
String: phase of the moon

Use dict to dispatch to type-specific functions - more Pythonically
canonical
String: abc
Int: 123
Real: -3.14
String: phase of the moon

Move expression-specific logic into parse-time parse actions
name: abc <type 'str'>
integer: 123 <type 'int'>
real: -3.14 <type 'float'>
name: phase of the moon <type 'str'>

Use class constructors as parse-time parse actions - results names no
longer needed
String: abc (StringObject)
Int: 123 (IntObject)
Real: -3.14 (RealObject)
String: phase of the moon (StringObject)



From celoserpa at gmail.com  Thu May 15 21:50:21 2008
From: celoserpa at gmail.com (Marcelo de Moraes Serpa)
Date: Thu, 15 May 2008 22:50:21 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
In-Reply-To: <op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
	<op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <1e5bcefd0805151850r899c923m3da14c089973beab@mail.gmail.com>

Hmm.. I re-read your message and I think I'm approaching testing in a
mechanical way, indeed.

You're right, my test is kind of pointless, given the objective of the
function, which is to generate a differnt directory name each time it is
called. I also found it kind of strange to repeat the implementation in the
test method. However, something keeps telling me that it still has to be
"unit" tested, sonehow (the algorith used).

Thanks,

Marcelo.

On Thu, May 15, 2008 at 9:54 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Thu, 15 May 2008 14:21:34 -0300, Marcelo de Moraes Serpa <
> celoserpa at gmail.com> escribi?:
>
>  So, I have this particular method, generate_chat_dir_string, which should
>> generate a string in the following format:
>>  "md5hexstring-day-month-year-hour-minute"
>> This string will be used to create a directory in the filesystem.
>>
>
> There is an issue here - how much behavior is considered in the public
> interfase, and how much is just an implementation detail. You only have to
> test the public interfase, what the method promises to do, NOT any internal
> implementation details.
>
> I don't think that the md5 string be part of the interfase - probably it's
> enough to promise different directory names for different combinations of
> "user" and "atendente". A separate question: do we promise to generate the
> same directory name for the same set of user/atendente, or not? (assuming
> the time part is constant).
> For the time part - is that format *required*, or just a means to obtain
> separate directory names, even for the same set of users, based on time?
> Or perhaps we *only* want to guarantee different results for different
> function calls, and ALL that stuff involving users and time are just
> implementation details?
> Depending on how you answer those questions, you write tests in a way or
> another way.
>
>  I'm trying to adopt the TDD approach, so, I'm starting by testing all the
>> methods of the Chat class, including this one. However, an issue just
>> popped
>> up, this is the test code:
>>
>>
>>   1.   def test_generate_chat_dir_string(self):
>>   2.         import md5
>>   3.         import random
>>   4.         import datetime
>>   5.         md5_handler = md5.new()
>>   6.         users = [{"user":"pedro","atendente":False},{
>>   "user":"jo?o","atendente":True}]
>>   7.         #salt = random.random().to_s()
>>   8.         #md5_handler.update(salt)
>>   9.         now = datetime.datetime.now()
>>   10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>>   11.         for user in users:
>>   12.             md5_handler.update(user["user"])
>>   13.
>>   14.
>>   15.         seed = md5_handler.hexdigest()
>>   16.
>>   17.         final_string = seed + "-" + ts
>>   18.
>>   19.         method_generated_string =
>> self.chat.generated_chat_dir_string
>>   (users,seed)
>>   20.
>>   21.         self.assertEquals(final_string,method_generated_string)
>>
>
> Looks like you have just copied the generated_chat_dir_string
> implementation here - that's not the point of testing, at least if you relax
> the restrictions as I said above.
>
> Supose the specification says, instead: the resulting directory must differ
> whether the set of users/atendente differs, or the request time is separated
> more than 1 minute apart.
>
> Then the tests should cover:
> - build a set of users and choose a point in time
> - generate dir1 with that set of users and that time
> - modify the set of users, generate dir2 and assert that it differs from
> dir1
>  Repeat other modifications, including:
>    one more user
>    one less user
>    same users, changing "atendente" for some
>    only one user
>    empty set of users (if it should raise an exception, check that it's
> actually raised)
>    what happens when only the *order* of users is changed? (why is it a
> list instead of a set?)
>    other conditions that might fail, perhaps based on your knowledge of the
> implementation (it's ok to test special cases that are special only because
> of how it is implemented, as far as you only test what is required by the
> specification). By example, suppose the md5 function is absolutely dumb and
> only accepts strings at most 32 characters long; test with a username longer
> than that.
>
> - Then, increment the time less than a minute and verify you *can* generate
> dir3 (our specification doesn't *require* it to be the same, so don't check
> more than required)
> - increment the time more than a minute, generate another dir and verify
> it's different.
>
> Notice that, to be able to make all those tests involving the *same* time
> we should process them very quickly so the minute part doesn't change (but
> it even might fail when we're near the minute end). Worse, the last test
> woul require to *wait* more than one minute to see the change...
> That's horrible - so we write the function in a way that *helps* testing.
> By example, adding another argument: the time to be used, which defaults to
> None meaning the current time.
>
> def generated_chat_dir_string(self, users, curtime=None):
>    if curtime is None: curtime = time.time()
>    ...
>
> (usually curtime is unused, but we do use it for testing)
>
> I hope it's more clear now how to define your tests.
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From inhahe at gmail.com  Fri May 16 10:13:04 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 16 May 2008 10:13:04 -0400
Subject: writing python extensions in assembly
Message-ID: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net>

Can anyone give me pointers/instructions/a template for writing a Python 
extension in assembly (or better, HLA)?




From jwashin at vt.edu  Tue May  6 11:05:16 2008
From: jwashin at vt.edu (Jim Washington)
Date: Tue, 06 May 2008 11:05:16 -0400
Subject: Am I missing something with Python not having interfaces?
In-Reply-To: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <482073AC.1000901@vt.edu>

jmDesktop wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I
> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm
> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.
> --
> http://mail.python.org/mailman/listinfo/python-list

Others have commented that interfaces are not normally important in Python.

However, if you want to do something *with* interfaces like declaring
that an object or class implements a particular interface, or querying
the interfaces implemented by an object, you might look at
zope.interface.  Although it is used by and created for Zope,
zope.interface is packaged to be installable and usable outside of zope.
 It's available at the Cheese Shop.

If you want to do adaptation from one interface to another or, for
example, register and look-up utilities by interface, zope.component is
also handy.

- Jim Washington


From grg2 at comcast.net  Tue May 20 11:15:32 2008
From: grg2 at comcast.net (A_H)
Date: Tue, 20 May 2008 08:15:32 -0700 (PDT)
Subject: Help with character encodings
Message-ID: <62d8a7af-4e63-4bb5-9440-4232282d6649@d45g2000hsc.googlegroups.com>

Help!

I've scraped a PDF file for text and all the minus signs come back as
u'\xad'.

Is there any easy way I can change them all to plain old ASCII '-' ???

str.replace complained about a missing codec.



Hints?






From exarkun at divmod.com  Mon May 12 15:06:31 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 15:06:31 -0400
Subject: Socket and cycle problem
In-Reply-To: <ef31cd3f-21ce-4dd0-b38e-e888d2c14ac6@z72g2000hsb.googlegroups.com>
Message-ID: <20080512190631.6859.1214063498.divmod.quotient.62582@ohm>

On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.poupa at gmail.com wrote:
> [snip]
>
>My script send me via 3883 port (VRPN) data, but only once. I need
>listening this port countinously.
>So I need  make some loop to print data from 3883 port permanent.
>Data that I recevied looks liek this:
>
>receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'

I'm not sure if you need to write a server or a client.  In your
original code, you had a client which repeatedly established out-
bound connections.  Here, you say you need to listen on a port.

>
>Do you think its necessary to use Twisted? Do you have any ideas how
>to do it with socket modul?

The basic version is pretty easy either way.  However, with Twisted,
you get cross-platform error handling without any extra effort, and
you don't have to think about the boring low-level details of BSD
sockets.

Here's a Twisted server that listens on port 3883 forever and prints
the data it receives from each connection after the remote side drops
the connection:

    from twisted.internet import reactor
    from twisted.internet.protocol import ServerFactory, Protocol

    class PrintingProtocol(Protocol):
        def connectionMade(self):
            """
            When the connection is first established, create a list
            into which to buffer all received data.
            """
            self.received = []

        def dataReceived(self, data):
            """
            Whenever any data is received on this connection, add it
            to the buffer.
            """
            self.received.append(data)

        def connectionLost(self, reason):
            """
            When the connection is lost, print out the contents of
            the receive buffer.
            """
            print repr("".join(self.received))

    # Create a factory which will use our protocol to handle incoming
    # connections.
    factory = ServerFactory()
    factory.protocol = PrintingProtocol

    # Listen with it on port 3883
    reactor.listenTCP(3883, factory)

    # Start the reactor.  Nothing in this program will ever stop the
    # reactor, so it will run and accept connections forever.
    reactor.run()

If you were to use the socket module, then it would look something like this:

    from socket import socket
    from errno import EINTR

    port = socket()
    port.bind(('', 3883))
    port.listen(5)
    while True:
        try:
            server, clientAddr = port.accept()
        except socket.error, e:
            print "Error accepting client connection", e
        else:
            received = []
            while True:
                try:
                    bytes = server.recv(1024 * 16)
                except socket.error, e:
                    if e.errno == EINTR:
                        continue
                    else:
                        break
                if not bytes:
                    break
                received.append(bytes)
            print repr("".join(received))

Hope this helps,

Jean-Paul


From dullrich at sprynet.com  Sun May 18 10:06:29 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sun, 18 May 2008 09:06:29 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
Message-ID: <dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>

On Sun, 18 May 2008 08:50:23 +0200, pataphor <pataphor at gmail.com>
wrote:

>In article <hjlt245hnhrle11khpupg6fppr000f8f51 at 4ax.com>, 
>dullrich at sprynet.com says...
>
>> >>   window.pos = (x,y)
>> >>
>> >> seems more natural than
>> >>
>> >>   window.SetPos(x,y);
>
>Yes, and to assign a row in a matrix I'd also like to use either tuples 
>or lists on the right side. 

Heh - in the current (flawed) implementation you can
say m.row[0] = 'Hello'; m.row[1]= 'World!' .Not that I see why 
you'd want to, but that happened in the test code just to
check that things were as general as I wanted - sure enough
m.row[0] + m.row[1] comes out to ['HW', 'eo', 'lr', ''ld', 'o!'].

>>   def __add__(self, other):
>>     return Row([x + y for x, y in zip(self, other)])
>> 
>> worked as hoped if self is a Row and other is a
>> Row _or_ a list.)
>> 
>> Anyway, my m.rows[j] can't be a list, because
>> I want to be able to say things like
>> m.rows[0] += c*m.rows[2]. Allowing 
>> m.rows[j] = [1,2,3] seems convenient, while
>> requiring m.rows[j] = Row([1,2,3]) fixes
>> this problem. Hmm.
>
>I'm not sure how far you'd go along with Gabriel's idea of decoupling 
>views from data but I think there isn't even a need for using a matrix 
>as the underlying data type. Why not use a flat list and compute matrix 
>positions according to a row or column adressing scheme on the fly? 

Is there some reason that would be better? It would make a lot
of the code more complicated. Ok, it would require only one
bit of added code, I suppose, but I don't see the plus side.

Hmm. It might actually _reduce_ the total amount of code,
since the code to access columns has to exist anyway and
rows could use the same code as columns with different
"start" and "skip". And come to think of it rows and
columns could be obtained just with a slice of the data.
So column access might even be more efficient. But I
expect that row access will happen a lot more often
than column access.

>P.

David C. Ullrich


From andrej.panjkov at climatechange.qld.gov.au  Wed May  7 20:45:06 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Wed, 7 May 2008 17:45:06 -0700 (PDT)
Subject: unified command line args, environment variables, .conf file 
	settings.
References: <c36900cf-8f95-42df-a7fb-517cf4cab654@y21g2000hsf.googlegroups.com>
Message-ID: <0f2f9774-e78e-44e4-bd0b-07daaa9f98f8@k1g2000prb.googlegroups.com>

On May 3, 12:16 pm, smitty1e <smitt... at gmail.com> wrote:
> Just a fun exercise to unify some of the major input methods for a
> script into a single dictionary.
> Here is the output, given a gr.conf file in the same directory with
> the contents stated below:
>


How about extending this to include other sources of control inputs.
I think a reasonable heirarchy is:

Interactive Input
 > Command Line Argument
  > Command Line Input File
   > Environment Variables
    > Local Defaults File
     > System Wide Defaults File
      > Installation Defaults File
       > 'Factory' Defaults File
        > In-Code Initialization Defaults


From roy at panix.com  Mon May 19 20:58:39 2008
From: roy at panix.com (Roy Smith)
Date: Mon, 19 May 2008 20:58:39 -0400
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
	<e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com>
	<DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net>
Message-ID: <roy-27A881.20583919052008@70-1-84-166.area1.spcsdns.net>

In article <DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d at pipex.net>,
 "Alan Wright" <alan.wright at volubill.com> wrote:

> Thanks for the feedback.
> 
> Using the socket in a list is great
> 
> However, as i imagined, I now get a limit of around 1500 conns before the 
> system crashes out, also i have noticed, that the ports loop back to 1025 
> when they hit 5000.
> 
> Any ideas on how to make the list/socket get to around 50K

Yikes.  Not on any box I know of.  A given process is limited in how many 
descriptors it can have open at once.  I don't know of any that will allow 
anywhere near 50k.  Somewhere in the 1-2000 range would be more typical.  
The 1500 you report is not at all surprising.

You might try creating a bunch of child processes with os.system() or 
something of that ilk.  Create 50 processes and have each one open 1000 
sockets.

The next thing you have to worry about is whether the OS can handle 50k 
file descriptors open per-system.  Or 50k sockets, or TCP connections.  I 
wouldn't be too surprised if many systems couldn't.  The address space (TCP 
port numbers) is 16-bit (unsigned), or about 65k, but you may well run into 
some other system limit long before you exhaust the theoretically available 
ports.

Something like Scapy, recommended by others, may indeed be able to generate 
all those SYN packets you want, but that doesn't mean you'll get all the 
open connections you seek.  You send a SYN packet to the remote host, and 
it sends back a SYN/ACK.  The local kernel now sees a SYN/ACK packet for a 
port it doesn't know about.  I'm not sure what the RFCs say about that, but 
I wouldn't be surprised if the kernel ends up sending a RST or maybe a FIN 
or something like that.  The kernel owns the ports; it's not nice to try 
and mess with them on your own.


From jhenRemoveThis at talk21.com  Fri May 30 22:04:14 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sat, 31 May 2008 12:04:14 +1000
Subject: SMS sending and receiving from website?
References: <e562dc51-8b26-4533-acac-49afee218254@a70g2000hsh.googlegroups.com>
Message-ID: <6abq0uF36n019U1@mid.individual.net>

globalrev wrote:

> can i send and receive messages from a website using python?

Absolutely.  But I'm not clear what you mean by "from a
website".  Do you mean to use SMPP protocol to lodge and
receive messages?  Or do you want access to your own cellular
hardware from a web interface?

> how would that work with costs? would the mobileowner pay both
> ways?

That depends on the country, the carrier and the offers/plans
that carrier makes.  In most of the civilized world, SMS
receivers pay nothing.

John


From kirk at daycos.com  Fri May 30 16:04:52 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 15:04:52 -0500
Subject: accumulator generators
References: <a3496e32-973e-4d7a-b1b5-d29548c04bae@g16g2000pri.googlegroups.com>
Message-ID: <87skvzlfrv.fsf@internal.daycos.com>

At 2008-05-30T19:50:43Z, Cameron <cameronlarue at gmail.com> writes:

> Why does that work, but not this:
>
> def foo(n):
>   s = n
>   def bar(i):
>     s += i
>     return s
>   return bar

Assume that n is an int, making s one also.  Ints are immutable; you can
only copy them.  So your bar is taking s, adding i to it, then assigning the
value back to the local variable named s.
-- 
Kirk Strauser
The Day Companies


From marlin_rowley at hotmail.com  Fri May 16 20:22:38 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 19:22:38 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <482E21F4.1090809@islandtraining.com>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<482E21F4.1090809@islandtraining.com>
Message-ID: <BAY135-W43441893314FFE4F3556AB9FCB0@phx.gbl>

 
Very cool.
 
> > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])
a represents a tile with height of 2 and width of 4 with 4 bits/pixel for each color.
 
> >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1')
this seperates the stream into individual values - Check
 
> >>> b.shape=(2,4,4)
This reshapes the array so that b.shape=(height,width,#bits/pixel) - Check
 
 >>> c = b.transpose((2,0,1))
 
What does the (2,0,1) represent in terms of width and height and number of bytes?
 



> Date: Fri, 16 May 2008 17:08:20 -0700> From: gherron at islandtraining.com> To: marlin_rowley at hotmail.com; python-list at python.org> Subject: Re: numpy.frombuffer != unpack() ??> > Marlin Rowley wrote:> > All:> > > > Say I have an array:> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > > > How do I make it so that I now have:> > > > starting with first element (a[0])> > new_arr[0] = 'r'> > new_arr[1] = 'g'> > new_arr[2] = 'b'> > new_arr[3] = 'a'> > new_arr[4] = 'r'> > .....> > > > continuing "through" a[1] with the same new_arr> > new_arr[N] = 'r'> > new_arr[N+1] = 'g'> > ....> > > > -M> > Numpy can do this for you. First, do you really mean the array to > contain lists of one string each? If so:> > >>> import numpy> >>> a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> >>> b = numpy.frombuffer(''.join(sum(a,[])),dtype='S1') # Kind of a > kludge here> >>> b> array(['r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b', 'b', 'b', 'a',> 'a', 'a', 'a', 'r', 'r', 'r', 'r', 'g', 'g', 'g', 'g', 'b', 'b',> 'b', 'b', 'a', 'a', 'a', 'a'],> dtype='|S1')> >>> b.shape=(2,4,4)> >>> b> array([[['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b'],> ['a', 'a', 'a', 'a']],> > [['r', 'r', 'r', 'r'],> ['g', 'g', 'g', 'g'],> ['b', 'b', 'b', 'b'],> ['a', 'a', 'a', 'a']]],> dtype='|S1')> >>> c = b.transpose((2,0,1))> >>> c> array([[['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']],> > [['r', 'g', 'b', 'a'],> ['r', 'g', 'b', 'a']]],> dtype='|S1')> >>> d=c.copy() # To make it contiguous> >>> d.shape = (32,)> >>> d> array(['r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r',> 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g', 'b', 'a', 'r', 'g',> 'b', 'a', 'r', 'g', 'b', 'a'],> dtype='|S1')> > Done. Cool no?> > Gary Herron> > >> >> >> >> > ------------------------------------------------------------------------> > From: marlin_rowley at hotmail.com> > To: robert.kern at gmail.com; python-list at python.org> > Subject: RE: numpy.frombuffer != unpack() ??> > Date: Fri, 16 May 2008 17:31:30 -0500> >> > Thank you! That solved it!> > > > -M> >> >> > ------------------------------------------------------------------------> >> > > To: python-list at python.org> > > From: robert.kern at gmail.com> > > Subject: Re: numpy.frombuffer != unpack() ??> > > Date: Fri, 16 May 2008 17:25:00 -0500> > >> > > Marlin Rowley wrote:> > > > All:> > > >> > > > I'm getting different floating point values when I use numpy> > vs. unpack().> > > >> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > > > buffer = unpack("!f", byte)> > > >> > > > frgba[0] != buffer[0]> > > >> > > > why? This is forcing me use the unpack() function since it's> > giving me> > > > the correct values. What am I doing wrong?> > >> > > Endianness, perhaps? '!' specifies big-endian data (an alias for> > '>'). Most> > > likely, you are on a little-endian platform. All of the dtypes> > in numpy default> > > to the native-endianness unless specified. If you want to read> > big-endian data> > > using numpy, do this:> > >> > > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > >> > > If you have any more problems with numpy, please join us on the> > numpy mailing> > > list. When reporting problems, please try to provide a small but> > complete> > > snippet of self-contained code, the output that you got, and> > explain the output> > > that you expected to get. Thank you.> > >> > > http://www.scipy.org/Mailing_Lists> > >> > > --> > > Robert Kern> > >> > > "I have come to believe that the whole world is an enigma, a> > harmless enigma> > > that is made terrible by our own mad attempt to interpret it as> > though it had> > > an underlying truth."> > > -- Umberto Eco> > >> > > --> > > http://mail.python.org/mailman/listinfo/python-list> >> >> > ------------------------------------------------------------------------> > E-mail for the greater good. Join the i?m Initiative from> > Microsoft.> > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood>> >> >> >> > ------------------------------------------------------------------------> > E-mail for the greater good. Join the i?m Initiative from Microsoft. > > <http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_%20GreaterGood> > >> > ------------------------------------------------------------------------> >> > --> > http://mail.python.org/mailman/listinfo/python-list> 
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_Refresh_family_safety_052008
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From hat at se-162.se.wtb.tue.nl  Thu May  8 06:35:54 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 08 May 2008 12:35:54 +0200
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <slrng25lsa.nlv.hat@se-162.se.wtb.tue.nl>

On 2008-05-08, Raxit at MyKavita.com <raxitsheth2000 at gmail.com> wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?

Yes, and all programs that people write typically look like the hello world
program.
Look at some real-world programs for a comparison, for example the Python
Cookbook: http://aspn.activestate.com/ASPN/Cookbook/Python/

> what can i do easily with python which is not easy in c++/java !?

- be productive in programming, rather than hassling with declaring all kind of
  stuff first.

- skip compile step.

On the other hand, if you typically write hello world programs, don't bother.
You won't see the difference.

Sincerely,
Albert


From ewertman at gmail.com  Wed May 28 17:00:44 2008
From: ewertman at gmail.com (Eric Wertman)
Date: Wed, 28 May 2008 17:00:44 -0400
Subject: php vs python
In-Reply-To: <7xr6bm2on9.fsf@ruckus.brouhaha.com>
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru> <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>
	<298ffbe3-5094-432a-a769-3170fa0cd072@x35g2000hsb.googlegroups.com>
	<naidnQFzULHdEqDVnZ2dnUVZ_sednZ2d@comcast.com>
	<7xr6bm2on9.fsf@ruckus.brouhaha.com>
Message-ID: <92da89760805281400u2c2df315t608a75509fbcb948@mail.gmail.com>

Flaming Thunder is teh awesome! :P


From castironpi at gmail.com  Fri May 16 09:18:22 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:18:22 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
Message-ID: <c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>

On May 16, 7:23?am, Bruno Desthuilliers <bruno.
42.desthuilli... at websiteburo.invalid> wrote:
> Kay Schluehr a ?crit :
>
>
>
>
>
> > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> >> Hello all,
>
> >> Yesterday we found the cause of a bug that has caused problems for a long time.
> >> It appeared to be the following:
>
> >> class A(object):
> >> ? ? pass
>
> >> print min(1.0, A())
>
> >> which is accepted by Python even though the A() object is not numerical in
> >> nature.
>
> >> The cause of this behavior seems to be the compare operation of the object
> >> class.
>
> >> Is there a way to disable this behavior in Python (other than deriving a new
> >> 'object-like' class that doesn't do comparisons?)
>
> > Are you sure you don't want to use a statically typed language that
> > captures all type errors just by inspecting your source code?
>
> This is not necessarily a static vs dynamic typing problem. The
> following code will raise a TypeError for very good reasons:
>
> ? ? print 1.0 + A()- Hide quoted text -
>
> - Show quoted text -

I question the real-world examples of coercion, casting, and
upcasting.  C insists that defining by operator, which may or may not
relate to system, is the only legal move.  I doubt operator+ is well-
defined on non-ideal structures.  Rationals are not floats, but system
got checked.  Define concurrency.


From goldnery at gmail.com  Sat May 10 09:01:39 2008
From: goldnery at gmail.com (Gandalf)
Date: Sat, 10 May 2008 06:01:39 -0700 (PDT)
Subject: Simple question
References: <f70d9274-2d7d-4b6f-9320-da70a99d931c@m3g2000hsc.googlegroups.com>
	<68lj5oF2sudm7U1@mid.individual.net>
Message-ID: <205f1f1e-073b-4edc-ad18-59d1d1b065d6@59g2000hsb.googlegroups.com>

On May 10, 2:36 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Gandalf wrote:
> > how can i ran script with python
>
> It depends on your web server configuration. To get your web server
> execute Python code, there are several alternatives like
>
> * CGI
> * FastCGI
> * mod_python
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #93:
>
> Feature not yet implemented

my server is my computer and all i did way to install python on it.


From notnorwegian at yahoo.se  Thu May 22 13:44:53 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Thu, 22 May 2008 10:44:53 -0700 (PDT)
Subject: import X vs from x import *
Message-ID: <c8ca75c3-98ab-4c74-8868-b58fbc12a0b2@m73g2000hsh.googlegroups.com>

import Tkinter
from Tkinter import *

i have a program where if i comment out either of those import-
statements i get an error.

i thought they meant the same thing and from was supposed to be just
to imort just a specific function and the * imports everything in the
module.
but aparently the above statements have diffrent meaning and i cant
figure it out fromt he tutorials.


From bj_666 at gmx.net  Tue May 13 07:35:24 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 11:35:24 GMT
Subject: Backslash frowned upon?
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <68tcnsF2uo1qcU3@mid.uni-berlin.de>

On Tue, 13 May 2008 03:25:06 -0700, wxPythoner wrote:

> Why is the  \  backslash character frowned upon?

Is it frowned upon?

Ciao,
	Marc 'BlackJack' Rintsch


From jcd at sdf.lonestar.org  Wed May 28 10:39:22 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Wed, 28 May 2008 10:39:22 -0400
Subject: Struct usages in Python
In-Reply-To: <e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
References: <e3a81e680805272113p7951c14fu19924304e60214e4@mail.gmail.com>
	<c3f69bf60805272207r2ff63e4cgef421460354daa1e@mail.gmail.com>
	<e3a81e680805280631v48e0980dyfaabafaa395e001@mail.gmail.com>
Message-ID: <1211985562.3335.18.camel@aalcdl07.lib.unc.edu>

On Wed, 2008-05-28 at 09:31 -0400, Alok Kumar wrote:
> I am getting following error when tried as you suggested.
> 
> self.event = []  #Create an empty list, bind to the name "event" under
> the "self" namespace
>            self.event.append(Event())   #Create an event object and
> append to the end of the list 
> 
> class Event():
>                 ^
> SyntaxError: invalid syntax
> 

He meant to say

  class Event(object):

Always subclass object, unless you have a very compelling reason not to,
or you are subclassing something else.




From dotancohen at gmail.com  Mon May 12 15:46:41 2008
From: dotancohen at gmail.com (Dotan Cohen)
Date: Mon, 12 May 2008 22:46:41 +0300
Subject: Learning Python for no reason
In-Reply-To: <1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
	<4828806c$0$11583$9b622d9e@news.freenet.de>
	<1emdnZDhZ6KeHrXVnZ2dnUVZ_j2dnZ2d@posted.visi>
Message-ID: <880dece00805121246g1d16ee61sd566cf6a75b5190b@mail.gmail.com>

2008/5/12 Grant Edwards <grante at visi.com>:
> For windows/unix hosted user-space applications, Python is
> pretty hard to beat.

Apparently, pythons _can_ be beat: (warning: graphic)
http://www.proexotics.com/graphics/ball_python_live_prey_1.jpg

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From alex.m.gusarov at gmail.com  Mon May 26 06:05:45 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Mon, 26 May 2008 17:05:45 +0700
Subject: finding icons for Apps
In-Reply-To: <ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>
References: <BCAFAD43-4BAD-4A1E-AFCD-AF0E3B29AE85@mimectl>
	<ac6dcb3d0805260255x5db0eda0w59ffb27f75c2a133@mail.gmail.com>
Message-ID: <ac6dcb3d0805260305h1a69cfcfh207c15d9fdfa0342@mail.gmail.com>

> With PyQt4 I can use even .SVG icons on all platforms ;) (and tango
> includes svg version for all icons)
>

Ok, I got it - "the thing you see on the Desktop or in a folder", sorry

Best regards, Alex Gusarov
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From arnodel at googlemail.com  Thu May 29 07:37:04 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 29 May 2008 12:37:04 +0100
Subject: Unit tests?
References: <mailman.1728.1212060473.12834.python-list@python.org>
Message-ID: <m2hcch2vfj.fsf@googlemail.com>

"Alex Gusarov" <alex.m.gusarov at gmail.com> writes:

> Hello, it seems that I have a problem - I almost finished my program
> and it's necessary to test it. But I've never do it before. I even
> don't know how I can do it.
> Please, give me some links to testing techniques, either common or
> specific to Python.
> I searched in Google for information, but 'cause I don't know anything
> about subject, I don't know where to start from.
>
> Thanks
> --
> Best regards, Alex Gusarov

Try googling "python unit test".  I did it, and amongst the first hits
were:

    * docs.python.org/lib/module-unittest.html

    * http://www.diveintopython.org/unit_testing/index.html

-- 
Arnaud


From kamhung.soh at gmail.com  Thu May  8 03:33:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Thu, 08 May 2008 17:33:36 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com>
Message-ID: <op.uatraax1ev04yd@melwxp23>

On Thu, 08 May 2008 15:42:07 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> This is what i've came up with.  My problem is that I can't get them to  
> properly evaluate.. when  comparewords() runs it finds itself...  Should  
> I have the keys of mapdict iterate over itself?  Is that possible?
>
> def annafind():
> 	fin = open('text.txt')		# file has one word per line
> 	mapdic = {}			# each word gets sorted & goes in here
> 	for line in fin:
> 		rawword = line.strip()
> 		word = list(rawword)
> 		word.sort()
> 		mapdic[''.join(word)] = 0
> 	return mapdic
>
>
> def comparewords(): ***not working as intended
> 	fin = open('text.txt')
> 	for line in fin:
> 		line = line.strip()
> 		word = list(line)
> 		word.sort()
> 		sortedword = (''.join(word))
> 		if sortedword in mapdic:
> 			print line
>
>
>
>
> On 2008-05-07 19:25:53 -0600, "Kam-Hung Soh" <kamhung.soh at gmail.com>  
> said:
>
>> On Thu, 08 May 2008 11:02:12 +1000, dave <squareswallower at 1ya2hoo3.net>
>> wrote:
>>
>>> Hi All,
>>>  I wrote a program that takes a string sequence and finds all the words
>>
>>> inside a text file (one word per line) and prints them:
>>>  def anagfind(letters): 	#find anagrams of these letters
>>> 	fin = open('text.txt')	#one word per line file
>>> 	wordbox = []		 #this is where the words will go
>>> 	for line in fin:
>>> 		word = line.strip()
>>> 		count = 0
>>> 		for char in letters:
>>> 			if char not in word:
>>> 				break
>>> 			else:
>>> 				count += 1
>>> 			if count == len(word):
>>> 				wordbox.append(word)
>>> 	return wordbox
>>>  Now I'd like to modify the code to naturally find all anagrams inside
>> a
>>> wordlist.  What would be the best way to do this?  Using Hints?  Is it
>>
>>> possible to iterate over dict keys?  How can I make a dict that maps
>>
>>> from a set of letters to a list of words that are spelled from those
>>
>>> letters?  Wouldn't I need to make the set of letters a key in a dict?
>>>  As always - Thanks for helping someone trying to learn...
>>>  Dave
>>>
>>  Suggestion: for each word, sort their characters and use them as the
>> dictionary key.  If two words have the same combination of characters,
>> then they are anagrams.  For example: "edam" and "made" are anagrams
>> because they have the letters 'a', 'd', 'e' and 'm'.
>>  Refer "Programming Pearls" by Jon Bentley.
>>  --
>> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</  
>> a>
>
>

Your code is always going to return the same list because every word is an  
anagram of itself.

Tip: Create a list for each dictionary key, then add a word to the list if  
that word is not in the list.  So:

mapdic('adem') --> ["edam", "made"]

P.S. When replying, the convention is to add your response to the bottom,  
not top of the message.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From kyosohma at gmail.com  Fri May 16 09:11:54 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 16 May 2008 06:11:54 -0700 (PDT)
Subject: Problem creating a shorcut
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <d4420c20-9db7-4a4d-861b-7ed60df7b531@34g2000hsh.googlegroups.com>

On May 16, 5:44?am, Wolfgang Draxinger <wdraxin... at darkstargames.de>
wrote:
> Mike Driscoll wrote:
> > Hi,
>
> > I've had this niggling issue from time to time. I want to
> > create a shortcut on the user's desktop to a website that
> > specifically loads Firefox even if Firefox is not the default
> > browser.
>
> > I usually use COM as it allows very specific settings of the
> > shortcut, such as the Working Directory and the Target Path.
> > However, the following will not work for some reason:
>
> > <code>
>
> > import win32com.client
> > import winshell
>
> > shell = win32com.client.Dispatch('WScript.Shell')
> > userDesktop = winshell.desktop()
>
> > shortcut = shell.CreateShortCut(userDesktop +
> > '\\MyShortcut.lnk') shortcut.Targetpath = r'"C:\Program
> > Files\Mozilla Firefox\firefox.exe"
> > https:\www.myCompanyWebsite.com\auth\preauth.php'
> > shortcut.WorkingDirectory = r'C:\Program Files\Mozilla Firefox'
> > shortcut.save()
>
> > </code>
>
> > This creates the following target path (which doesn't work):
>
> > "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
> > \www.myCompanyWebsite.com\auth\preauth.php"
>
> > If I leave the website off, it works. If I leave the path to
> > Firefox out, it works too. Is there another method I can use
> > other than creating the shortcut by hand and using the shutil
> > module?
>
> > Thank you for any ideas.
>
> I see four problems:
>
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.
>
> 2) In URIs there are no backslashes, only forward slashes. You
> coded
>
> https:\...
>
> which is _WRONG_. URIs are <protocoll>://<host>/<resource>, where
> for some protocolls <host> is empty (file protocoll e.g.).


That was an accident...my original code was correct, but I stupidly
decided to generalize my website's name and put the wrong slashes in.


>
> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. On *nix
> systems you normally have all programs in $PATH, so a non full
> qualified path would be sufficient. On Windows this works, too,
> _IF_ the installation directory of the to be used application
> get's added to the PATH environment variable.
>


I don't assume it at all. At my place of business, that's where
Firefox is. If it's not installed there when the user logs in, one of
my scripts installs it automatically.


> Wolfgang Draxinger
> --
> E-Mail address works, Jabber: hexar... at jabber.org, ICQ: 134682867



From gagsl-py2 at yahoo.com.ar  Thu May 15 05:43:51 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 06:43:51 -0300
Subject: How to subclass file
References: <2oLWj.137678$rd2.90955@pd7urf3no>
Message-ID: <op.ua6vzdwcx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 May 2008 21:23:26 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> I want to create a subclass of 'file' but need to open the file with  
> os.open
> (because I want to open it in exclusive mode), and need an additional  
> method.
>
> Because I need an additional method, I truly need a object of my sublass.
> If I do something like
>
> class myFile(file):
>
>   def __new__(cls, filename):
>     import os
>     fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
>    return os.fdoen(fd, 'w')
>
>   def myMethod(self):
>     do_something
>
>
> then x = myFile('somefilename') is of type file, not myFile, and  
> therefore
> does not have myMethod as a valid method.

Use delegation instead of inheritance.

 from __future__ import with_statement
import os

class myFile(object):
     __slots__ = ['_file']

     def __init__(self, filename):
         fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
         f = os.fdopen(fd, 'w')
         object.__setattr__(self, '_file', f)

     def __getattr__(self, name):
         return getattr(self._file, name)

     def __setattr__(self, name, value):
         setattr(self._file, name, value)

     def mymethod(self):
         print "anything"


<output>
py> regular_file = open(r"c:\\temp\\regular.txt", "wt")
py> special_file = myFile(r"c:\\temp\\special.txt")
py> print regular_file
<open file 'c:\\temp\\regular.txt', mode 'wt' at 0x00A411D0>
py> print special_file
<__main__.myFile object at 0x00A3D1D0>
py> print dir(regular_file)
['__class__', '__delattr__', '__doc__', '__enter__', '__exit__',  
'__getattribute
__', '__hash__', '__init__', '__iter__', '__new__', '__reduce__',  
'__reduce_ex__
', '__repr__', '__setattr__', '__str__', 'close', 'closed', 'encoding',  
'fileno'
, 'flush', 'isatty', 'mode', 'name', 'newlines', 'next', 'read',  
'readinto', 're
adline', 'readlines', 'seek', 'softspace', 'tell', 'truncate', 'write',  
'writeli
nes', 'xreadlines']
py> print dir(special_file)
['__class__', '__delattr__', '__doc__', '__getattr__', '__getattribute__',  
'__ha
sh__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',  
'__re
pr__', '__setattr__', '__slots__', '__str__', '_file', 'mymethod']
py> with special_file:
...   special_file.write("hello\n")
...   special_file.mymethod()
...
anything
py> print "closed?", special_file.closed
closed? True
</output>

(note that __enter__/__exit__ -used by the with statement- work fine, even  
if not listed by dir(); also the "closed" attribute exists and is set  
correctly)

Note also that myFile is *not* a subclass of file:

py> isinstance(special_file, file)
False

but it has all methods and attributes of file objects, even if  
dir(special_files) doesn't list them. Duck typing in action - typical  
Python code should work fine with this myFile object instead of a true  
file object, but if you actually need a file subclass, I think you'll have  
to write a C extension.

-- 
Gabriel Genellina



From arnodel at googlemail.com  Mon May 12 14:04:01 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 19:04:01 +0100
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu>
	<mailman.825.1210293599.12834.python-list@python.org>
	<pecora-DFE713.11234209052008@ra.nrl.navy.mil>
	<mailman.882.1210361735.12834.python-list@python.org>
	<f6743b81-9324-46dd-bbd3-ef8812e28197@d77g2000hsb.googlegroups.com>
	<hkse24lhna7fp26tcfv5literfaded6nov@4ax.com>
	<mailman.954.1210556223.12834.python-list@python.org>
	<6b64d8f4-3f61-4295-9298-4633214d1e94@m73g2000hsh.googlegroups.com>
	<mailman.962.1210572565.12834.python-list@python.org>
	<03166a24-ba2d-40bf-98c8-5344382e9b76@b64g2000hsa.googlegroups.com>
	<caa7c004-02b8-4c1c-995b-1e4bfcaf716a@34g2000hsf.googlegroups.com>
	<4f10b3e8-065b-4592-9b62-7678bcafb137@27g2000hsf.googlegroups.com>
Message-ID: <m2prrrielq.fsf@googlemail.com>

Mark Dickinson <dickinsm at gmail.com> writes:

> On May 12, 11:15?am, Arnaud Delobelle <arno... at googlemail.com> wrote:
>
>> But exp(y*log(x)) -> 1 as (x, y) -> (0, 0) along any analytic curve
>> which is not the x=0 axis (I think at least - it seems easy to prove
>> that given f and g analytic over R, f(x)*ln g(x) -> 0 as x -> 0 if
>> f(0)=g(0)=0 and g(x)>0 in the neighbourhood of 0).
>
> Agreed.  And this makes an excellent argument that if you're going to
> choose a number for 0.0**0.0 then it's got to be 1.  But I still don't
> find it completely convincing as an argument that 0.0**0.0 should be
> defined at all.
>
>> This should cover most practical uses?
>
> Maybe.  But if you're evaluating x**y in a situation where x and y
> represent physical quantities, or otherwise have some degree of error,
> then you probably want to be warned if x and y both turn out to be
> zero.

Yes.  I'm not much of a physicist so I don't feel confident about this
at all, but when you work out x**y, if x is a measured quantity with
dimensions, then raising it to a power only makes sense if y is
dimensionless and an integer, or maybe a rational with a small
denominator (i.e. it makes sense to cube root a volume, but not a
velocity).

-- 
Arnaud


From ivan.illarionov at gmail.com  Thu May  1 20:20:56 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Fri, 2 May 2008 00:20:56 +0000 (UTC)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru> <874p9hvce5.fsf@physik.rwth-aachen.de>
Message-ID: <fvdmp8$3ep$3@news.mtu.ru>

On Fri, 02 May 2008 01:21:38 +0200, Torsten Bronger wrote:

> Hall?chen!
> 
> Ivan Illarionov writes:
> 
>> [...]
>>
>> For me it looks more like an old-school/new-school thing than use-case
>> thing. I may be wrong, but I see more and more new projects use things
>> like reST and YAML/JSON and it feels like they are gradually replacing
>> traditional old-school solutions.
>>
>> And I've got very strong impression that YAML is a the future of
>> configuration files when Google released their App Engine.
> 
> In contrast to many other areas of software, configuration files needn't
> be compatible with anything except the user's brain.  So even if the
> rest of the world uses config format X, you can safely stick with config
> format Y.

There are several reasons for compatibility:

1. The user or another developer might want to write GUI front-end to 
configure your app. With standard format this would be easier.

2. Similar apps might want to have a feature like "import settings" from 
other apps. Traditional config files made this PITA -- and that's why 
this feature is extremely rare.

3. Bigger applications that include your sofware as one of its components 
may need to automate configuration process and update several config 
files of different smaller apps from one global setting.

That's precisely why first XML and now YAML became popular for config 
files.

> I mean, YAML is not really a complex thing, yet it was conceived not
> before 2001.  The reason is that traditional config files do a good job.
> 
> Tsch?,
> Torsten.

-- 
Ivan


From fdsa at jklh.dili5na  Fri May 30 19:23:05 2008
From: fdsa at jklh.dili5na (Gordon Etly)
Date: Fri, 30 May 2008 16:23:05 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
Message-ID: <6abgirF358rgoU1@mid.individual.net>

Lew wrote:
> John Thingstad wrote:

> > Perl is solidly based in the UNIX world on awk, sed, bash and C.
> > I don't like the style, but many do.

> Please exclude the Java newsgroups from this discussion.

Why? Do you speak for everyone in that, this, or other groups?


-- 
G.Etly 




From rhamph at gmail.com  Mon May 12 16:19:15 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Mon, 12 May 2008 13:19:15 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
	<4823f61e$0$34533$742ec2ed@news.sonic.net>
	<7bbbb71e-d163-4978-ab90-b96652598757@u6g2000prc.googlegroups.com>
	<SrednbMmuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com>
	<07d4f574-ffda-4c7f-9561-b3be424b141f@y18g2000pre.googlegroups.com>
	<339cd7bd-0406-430f-93af-148e02c050ca@l17g2000pri.googlegroups.com> 
	<5bb546cd-1175-434c-9843-70f2ff691f15@c19g2000prf.googlegroups.com>
Message-ID: <4cdb7e58-85e4-4e3f-8244-df87526b82a3@k10g2000prm.googlegroups.com>

On May 12, 1:31 pm, skunkwerk <skunkw... at gmail.com> wrote:
> On May 12, 1:40 am, Rhamphoryncus <rha... at gmail.com> wrote:
>
>
>
> > On May 11, 10:16 am,skunkwerk<skunkw... at gmail.com> wrote:
>
> > > On May 10, 1:31 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > > > On Fri, 9 May 2008 08:40:38 -0700 (PDT),skunkwerk<skunkw... at gmail.com>
> > > > declaimed the following in comp.lang.python:
>
> > > >         Coming in late...
>
> > > > > On May 9, 12:12 am, John Nagle <na... at animats.com> wrote:
> > > > > >skunkwerkwrote:
> > > > > > > i've declared a bunch of workerthreads(100) and a queue into which
> > > > > > > new requests are inserted, like so:
>
> > > >         <snip>
>
> > > > > > > queue = Queue.Queue(0)
> > > > > > >  WORKERS=100
> > > > > > > for i in range(WORKERS):
> > > > > > >    thread = SDBThread(queue)
> > > > > > >    thread.setDaemon(True)
> > > > > > >    thread.start()
>
> > > > > > > the thread:
>
> > > > > > > class SimpleDBThread ( threading.Thread ):
> > > > > > >    def __init__ ( self, queue ):
> > > > > > >            self.__queue = queue
>
> > > >         Note: double-leading __ means "name mangling" -- typically only
> > > > needed when doing multiple layers of inheritance where different parents
> > > > have similar named items that need to be kept independent; a single _ is
> > > > the convention for "don't touch me unless you know what you are doing"
>
> > > > > > >            threading.Thread.__init__ ( self )
> > > > > > >    def run ( self ):
> > > > > > >            while 1:
> > > > > > >                    item = self.__queue.get()
> > > > > > >                    if item!=None:
> > > > > > >                            model = domain.get_item(item[0])
> > > > > > >                            logger.debug('sdbthread item:'+item[0])
> > > > > > >                            title = model['title']
> > > > > > >                            scraped = model['scraped']
> > > > > > >                            logger.debug("sdbthread title:"+title)
>
> > > > > > > any suggestions?
> > > > > > > thanks
>
> > > >         <snip>
>
> > > > > thanks John, Gabriel,
> > > > >   here's the 'put' side of the requests:
>
> > > > > def prepSDBSearch(results):
> > > > >    modelList = [0]
> > > > >    counter=1
> > > > >    for result in results:
> > > > >            data = [result.item, counter, modelList]
> > > > >            queue.put(data)
> > > > >            counter+=1
> > > > >    while modelList[0] < len(results):
> > > > >            print 'waiting...'#wait for them to come home
> > > > >    modelList.pop(0)#now remove '0'
> > > > >    return modelList
>
> > > >         My suggestion, if you really want diagnostic help -- follow the
> > > > common recommendation of posting the minimal /runable (if erroneous)/
> > > > code... If "domain.get_item()" is some sort of RDBM access, you might
> > > > fake it using a pre-loaded dictionary -- anything that allows it to
> > > > return something when given the key value.
>
> > > > > responses to your follow ups:
> > > > > 1)  'item' in thethreadsis a list that corresponds to the 'data'
> > > > > list in the above function.  it's not global, and the initial values
> > > > > seem ok, but i'm not sure if every time i pass in data to the queue it
> > > > > passes in the same memory address or declares a new 'data' list (which
> > > > > I guess is what I want)
>
> > > >         Rather confusing usage... In your "put" you have a list whose first
> > > > element is "result.item", but then in the work thread, you refer to the
> > > > entire list as "item"
>
> > > > > 3)  the first item in the modelList is a counter that keeps track of
> > > > > the number ofthreadsfor this call that have completed - is there any
> > > > > better way of doing this?
>
> > > >         Where? None of your posted code shows either "counter" or modelList
> > > > being used by thethreads.
>
> > > >         And yes, if you havethreadstrying to update a shared mutable, you
> > > > have a race condition.
>
> > > >         You also have a problem if you are using "counter" to define where
> > > > in modelList a thread is supposed to store its results -- as you can not
> > > > access an element that doesn't already exist...
>
> > > > a = [0]
> > > > a[3] = 1        #failure, need to create elements 1, 2, 3 first
>
> > > >         Now, if position is irrelevant, and a thread just appends its
> > > > results to modelList, then you don't need some counter, all you need is
> > > > to check the length of modelList against the count expected.
>
> > > >         Overall -- even though you are passing things via the queue, the
> > > > contents being pass via the queue are being treated as if they were
> > > > global entities (you could make modelList a global, remove it from the
> > > > queue entries, and have the same net access)...
>
> > > >         IOWs, you have too much coupling between thethreadsand the feed
> > > > routine...
>
> > > >         As for me... I'd be using a second queue for return values...
>
> > > > WORKERTHREADS = 100
> > > > feed = Queue.Queue()
> > > > result = Queue.Queue()
>
> > > > def worker():
> > > >         while True:
> > > >                 (ID, item) = feed.get()                 #I leave the queues globals
> > > >                                                                                 #since they perform locking
> > > >                                                                                 #internally
> > > >                 model = domain.get_item(item)
> > > >                 results.put( (ID, model["title"], model["scraped"]) )
>
> > > > for i in range(WORKERTHREADS):
> > > >         aThread = threading.Thread(target=worker)
> > > >                 #overkill to subclass as there is now no specialized init
> > > >                 #and if I really wanted to make the queues non-global
> > > >                 #I'd pass them as arguments:
> > > >                 #       threading.Thread(target=worker, args=(feed, results))
> > > >                 #where worker is now
> > > >                 #       def worker(feed, results):
> > > >         aThread.setDaemon(True)
> > > >         aThread.start()
>
> > > > ...
>
> > > > def prepSearch(searches):
> > > >         modelList = []
> > > >         counter = 0
> > > >         for searchItem in searches:
> > > >                 feed.put( (counter, searchItem) )
> > > >                 counter += 1
> > > >                 modelList.append(None)  #extend list one element per search
> > > >         while counter:
> > > >                 (ID, title, scraped) = results.get()
> > > >                 modelList[ID] = (title, scraped)
> > > >                 counter -= 1
> > > >         return modelList
>
> > > >         The only place counter and modelList are modified are within the
> > > > prepSearch. I'm passing counter out and back to use as an ID value if
> > > > the final results are supposed to be in order -- that way if one thread
> > > > finishes before another, the items can be placed into the list where
> > > > they'd have been sequentially.
>
> > > >         I can only hope that "domain.get_item" is an activity that is I/O
> > > > bound AND that it supports parallel accesses... Otherwise the above
> > > > workerthreadsseem to be adding a lot of overhead for queue I/O and
> > > > threading swaps for what is otherwise a rather linear process.
>
> > > >         Perhaps your posts don't reveal enough... Maybe you have multiple
> > > > mainthreadsthat are posting to the worker feed queue (and you were
> > > > using separate mutables for storing the results). In this situation, I'd
> > > > remove the results queue from being a global entity, create one queue
> > > > per main processing thread, and pass the queue as one of the parameters.
> > > > This way, a worker can return data to any source thread by using the
> > > > supplied queue for the return...
>
> > > > Modify prepSearch with:
>
> > > >         myQueue = Queue.Queue()
> > > > ...
> > > >         feed.put( (counter, searchItem, myQueue) )
> > > > ...
> > > >         (ID, title, scraped) = myQueue.get()
>
> > > > Modify worker with:
>
> > > >         (ID, item, retqueue) = feed.get()
> > > > ...
> > > >         retqueue.put( (ID, model["title"], model["scraped"]) )
>
> > > wow.  thanks for the help.
> > >    i seem to have fixed my problem though - it turns out
> > > domain.get_item was not thread safe as it was using the underlying
> > > httplib.  the solution was to create a new connection to the database
> > > for each thread (which is ok as the database is meant to be queried in
> > > a massively paralell fashion).  the missing part of the code included
> > > a part where i inserted the results at the given position into the
> > > list.
>
> > > the only issue i have now is that it takes a long time for 100 threads
> > > to initialize that connection (>5 minutes) - and as i'm doing this on
> > > a webserver any time i update the code i have to restart all those
> > > threads, which i'm doing right now in a for loop.  is there any way I
> > > can keep the thread stuff separate from the rest of the code for this
> > > file, yet allow access?  It wouldn't help having a .pyc or using
> > > psycho, correct, as the time is being spent in the runtime?  something
> > > along the lines of 'start a new thread every minute until you get to a
> > > 100' without blocking the execution of the rest of the code in that
> > > file?  or maybe any time i need to do a search, start a new thread if
> > > the #threads is <100?
>
> > $ python2.5 -m timeit -s 'import threading' 't = threading.Thread();
> > t.start(); t.join()'
> > 10000 loops, best of 3: 131 usec per loop
>
> > Clearly it is not the threads themselves, but something else which is
> > expensive.
>
> > It's not clear why you need threads at all.  Unless you've got a lot
> > of cpus/cores running that DBMS, or it's got fairly high latency (and
> > no way to pipeline), attacking it with more threads isn't gonna give
> > significant speedups.
>
> correct.  the threads themselves are not taking up the time, but the
> initialization of each thread (which includes making a new connection
> to the database) - typically this is ~3 seconds.  The database is
> amazon's simpleDB, which is meant to support massively parallel
> queries.  once the connection has been made, queries are very fast.

So it shouldn't take much more than 3 seconds to create all 100
threads.  It certainly should take 5 minutes.  However, 3 seconds *
100 = 5 minutes, so it sounds like the connection process is getting
serialized somehow.

Maybe you're doing the connection in the thread's __init__?  Note that
__init__ is called when the thread *object* is created, by the main
thread, and not when you *start* the thread.

I find the threading.Thread API to be vastly over complicated.  It's
much simpler to wrap it like this:

def start_thread(func, *args, **kwargs):
    t = threading.Thread(target=func, args=args, kwargs=kwargs)
    t.start()
    return t

Then you can pass a function to start_thread and it will run in the
new child thread.


From andrej.panjkov at climatechange.qld.gov.au  Tue May  6 01:31:22 2008
From: andrej.panjkov at climatechange.qld.gov.au (andrej.panjkov at climatechange.qld.gov.au)
Date: Mon, 5 May 2008 22:31:22 -0700 (PDT)
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au> 
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org> 
	<fvigaa$bdc$1@panix3.panix.com>
Message-ID: <956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>

At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
other unixy OSes.

We have python installed in a number of different places:
/bin/python
/usr/local/bin/python
/usr/bin/python
/opt/freeware/Python/Python-2.5.1/bin/python
~mataap/platform/python/python-2.5.1

So I cannot assume a single location for python.  Nor for any other
tool, really.  Bash for example.  It may indeed be in /usr/bin on many
systems, on many others it is not.

Note the version specific install points.  This allows us to switch
over easily to different versions, and keep older versions in case
they are needed.  We can test new versions before cutting over to them
operationally. (This matters for tools that are still changing, like
python or bash.)

We use the very handy 'modules' package (not python modules, not
fortran modules) to adjust our paths and environment variables as
needed.

Some of the install points are determined by policy, or historical
constraints, or hardware limits, or file system layout.

Now it is true that it is easy to edit a single script to change the
hashbang line.  It is not easy to change several hundred scripts, on
different machines.  It is easy to adjust the environment to point to
the right python path, and have all your scripts pick it up
automatically.

Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.


From notbob at nothome.com  Wed May 21 16:10:41 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 20:10:41 GMT
Subject: php vs python
Message-ID: <5l%Yj.77$mz3.53@fe101.usenetserver.com>

I'm not posting this just to initiate some religious flame war, though it's
the perfect subject to do so.  No, I actaully want some serious advice about
these two languages and since I think usenet is the best arena to find it,
here ya' go.

So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
want learn the guts of it instead of just booting up some wordwank or
whatever.  I started to learn python, but heard php was easier or faster or
more like shell scripting or... fill in the blank.  Anyway, so I change over
to learning php.  Then I run across that blog, Coding Horror, and start
reading articles like this:

http://www.codinghorror.com/blog/archives/001119.html

Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
much.  I can setup mysql and apache,, but don't know how to use 'em, really.
I use emacs and run slackware and can fumble my way through bash scripts,
but I can't really write them or do lisp.  I've taken basic basic and basic
C, but am barely literate in html.  Sometimes it seems overwhelming, but I
persevere because it's more fun/challenging than video games, which bore me
to tears.  

Well, that's my actual question, then.  Is php really so bad I'm just
wasting my time?  Or is it really the quickest way to blog functionality?
Would I be better served in the long run learning python, which claims to be
easy as pie to learn/program (still looks hard to me).  I admit I'm no code
geek.  But, I'm not completely brain dead, either, and I need something to
keep my geezer brain sparking.  What say ye?

nb


From castironpi at gmail.com  Sat May 17 20:58:50 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 17:58:50 -0700 (PDT)
Subject: write to specific line in file?
References: <a0655d53-561f-446b-ae5b-49d7e137a844@a70g2000hsh.googlegroups.com>
	<104ddf01-e860-4194-87bb-753a5e837ec0@s50g2000hsb.googlegroups.com> 
	<29b9fb36-17bb-4449-aab9-e10361d0b0e4@b1g2000hsg.googlegroups.com> 
	<2c673602-8b32-43cf-be47-2e981b971973@b64g2000hsa.googlegroups.com>
Message-ID: <d0bee883-f59a-4fc9-a17c-35c5d4ff6901@e53g2000hsa.googlegroups.com>

On May 16, 5:57?pm, castironpi <castiro... at gmail.com> wrote:
> On May 16, 5:22?pm, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 2:25?pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
> > > globalrev wrote:
> > > > i ahve a program that takes certain textsnippets out of one file and
> > > > inserts them into another.
>
> > > > problem is it jsut overwrites the first riow every time.
>
> > > > i want to insert every new piece of text into the next row.
> > > > so:
> > > > 1. how do i write to a new line every time i write to the file?
>
> > > > 2. if i dont want to write to a new line but just want to insert it
> > > > after the last token in the file, how do i do then?
>
> > > Generally, you can't "insert" anything into a file. ?You can either
> > > append to the end of a file, or you can rewrite the whole file. ?It
> > > sounds like you probably want to read the file into an array using
> > > readlines(). ?Then manipulate that array however you want--appending
> > > and inserting--and when you are done, overwrite the file with your
> > > array.
>
> > > However, you should be aware that as soon as you open a file for
> > > writing all the data is erased, and if your program should happen to
> > > crash right then, the array containing the data will disappear into
> > > the ether and your file will be empty--in other words all your data
> > > will be gone. ?To prevent such an occurence, you should write your
> > > final data to another file, then delete the original file, and finally
> > > change the other file's name to the original file name.
>
> > Some options:
>
> > 1. ?Limit line length. ?Then offset is ( line* length ).
> > 2. ?Name your relation.
> > 3. ?Hijack the operating system. ?Remember:
>
> > abc
> > def
>
> > on disk looks like
> > abc\ndef
>
> > where
>
> > abcd
> > def
>
> > looks like
> > abcd\ndef
>
> > So, if you want line 2, you have to scan line 1.- Hide quoted text -
>
> > - Show quoted text -
>
> You also have
>
> f.seek( X )
> f.write( 'abc' )
>
> which writes 'abc' in the middle, at offset X.
>
> f.seek( 0, SEEK_END )
>
> takes you to the back, and don't forget
>
> f.flush( ).
>
> Say you have:
>
> File:
>
> abc
> def
> ghi
>
> Symbols:
>
> 0-3
> 1-3
> 2-3
>
> abcdefghi
>
> and you want to make abc abC. ?Then
>
> f.seek( 2 )
> f.write( 'C' )
>
> does work.
>
> If you want to make abc ab, then you change a different file
>
> table.seek( 0 )
> table.write( chr( 2 ) )
>
> ( or bytes( [ 2 ] ) in 3.0 ).
>
> If you want to make abc abcd, then you change both.
>
> f.seek( 9 )
> f.write( 'd' )
>
> table.seek( 0 )
> table.write( chr( 4 ) )
>
> But. ?Now you have item 0 in two places. ?'abc' somewhere and 'd'
> somewhere else, at 0 and at 9 respectively. ?I think the file system
> overallocates room for String 1. ?You would read:
>
> 0- 2- [ 3, 1 ]
>
> for 'abc'+'d'
>
> and
>
> 1- 1- [ 3 ]
> 2- 1- [ 3 ]
>
> for 'def' and 'ghi', where actual representations would be:
>
> 0- 2- [ 0/3, 9/1, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> As your chains start to grow, leave table 8xN, and just copy strings
> to new sectors when they become long:
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> You can insort in linear time when you're looking for available slots.
>
> 'jklm' can't fit at 0.
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
>
> but 'nop' can.
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 1- [ 13/4, 0, 0, 0, 0, 0, 0, 0 ]
> 4- 1- [ 0/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> 'jklm' could've with a split:
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
>
> and with 'nop':
>
> 0- 1- [ 9/4, 0, 0, 0, 0, 0, 0, 0 ]
> 1- 1- [ 3/3, 0, 0, 0, 0, 0, 0, 0 ]
> 2- 1- [ 6/3, 0, 0, 0, 0, 0, 0, 0 ]
> 3- 2- [ 0/3, 13/1, 0, 0, 0, 0, 0, 0 ]
> 4- 1- [ 14/3, 0, 0, 0, 0, 0, 0, 0 ]
>
> There's an easy chance you can beat DbfilenameShelf for your
> application.- Hide quoted text -
>
> - Show quoted text -

I am still interested in this one, but doubt if anyone still reading.


From goldnery at gmail.com  Fri May 23 14:44:52 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 11:44:52 -0700 (PDT)
Subject: Another Question
References: <d34f53cf-c608-49af-8e59-926aae645778@y21g2000hsf.googlegroups.com>
	<5c2e7570-6bb1-46d8-8dd5-b1a257431b31@p25g2000hsf.googlegroups.com> 
	<deffaa96-2f50-483d-8375-4d34a344d703@z66g2000hsc.googlegroups.com> 
	<dcfce8f3-3139-43f8-9191-7c00edc777e6@27g2000hsf.googlegroups.com>
Message-ID: <57c4cdf6-4920-46f9-986e-e2859de7de8b@27g2000hsf.googlegroups.com>

you've been very helpful but still i have only one problem. I wont the
window not to be close after clicking the X button.
I wont the program to stay on the toolbar

thanks!


From eliben at gmail.com  Tue May 27 11:54:48 2008
From: eliben at gmail.com (eliben)
Date: Tue, 27 May 2008 08:54:48 -0700 (PDT)
Subject: SocketServer, its offspring, and threads
References: <dc5e1c87-ef56-40ef-8eb9-bc21ed402016@m44g2000hsc.googlegroups.com>
	<acf63ade-4704-47a4-8cc1-8139b7c8e38c@f36g2000hsa.googlegroups.com>
Message-ID: <e4db75a8-1c51-42fb-aed2-aba92232fcb4@k37g2000hsf.googlegroups.com>

On May 26, 7:30 pm, "Giampaolo Rodola'" <gne... at gmail.com> wrote:
> On 25 Mag, 17:40, eliben <eli... at gmail.com> wrote:
>
>
>
> > Hello,
>
> > I have a small wxPython application. Today I was trying to add some
> > RPC capability to it, so I implemented an instance of
> > SimpleXMLRPCServer that runs in a separate thread when invoked and
> > answers requests.
>
> > All went fine until I realized that I have to sometimes stop the
> > server - which is where I ran into a problem. Python threads can not
> > be killed after they've been started. They can be kindly requested to
> > end, but it's up to the thread itself to decide when it wants to
> > finish. At least this is my understanding. It probably makes sense,
> > because threads can hold resources which can't just be dropped
> > suddenly, and have to be cleaned in a proper manner. (Does this sound
> > like the truth ?)
>
> > Anyway, this creates a problem because SimpleXMLRPCServer likes to
> > block and never return. I dug deeper and found out that all offspring
> > of SocketServer can only handle requests in a blocking manner. Even if
> > you call handle_request( ) and not serve_forever(), it will block
> > until a request is received and handled. This means that a
> > SocketServer object running in a thread blocks the thread, and this
> > thread can not be stopped.
>
> > Is there any graceful solution to this problem ?
>
> > I suppose I can use sockets in non-blocking mode, or use select(), but
> > this will mean I will have to implement my server with raw sockets and
> > not a handy helper like SocketServer. For the XML-RPC server I want
> > this is a headache, as I will probably have to implement my own XML-
> > RPC server based on raw non-blocking sockets.
>
> > Thanks in advance for any ideas and suggestions
> > Eli
>
> A "shutdown" method has been added to SocketServer.
> Since it will be available in Python 2.6 and 3.0 you could look at the
> patch and include a modified version of SocketServer into your package
> and use it:http://bugs.python.org/issue1193577
>

This is what I was looking for, thanks.




From netizen at gmx.de  Wed May 28 07:42:15 2008
From: netizen at gmx.de (Michael Fesser)
Date: Wed, 28 May 2008 13:42:15 +0200
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <n1hq34l3mh1l8878rkop272jlhbmpuf4tg@4ax.com>

.oO(Ivan Illarionov)

>No. Language does matter.

And the weather.

If you know how to program, you can write good code in any language if
you're familiar enough with it. Many people write good code in PHP, and
many write total crap in C/C++. It's almost never about the language,
but about the programmer.

Micha


From vivainio at gmail.com  Mon May  5 12:39:08 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 16:39:08 GMT
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <MKGTj.182$4X3.170@read4.inet.fi>

ron.longo wrote:

 > unable to execute.  Why is this?  At this point I'm not really keen on
 > handing out the source files to my application, it feels unprofessional.

If you plan to deploy on windows, py2exe could be the more 
"professional" approach you are thinking of.


From larry.bates at websafe.com`  Fri May 16 10:04:58 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 09:04:58 -0500
Subject: class problem, NoneType obj has no attribute
In-Reply-To: <73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<482d7bbc$0$15491$426a74cc@news.free.fr>
	<73faf823-7c91-4a62-82be-3cb0e4ae511b@b1g2000hsg.googlegroups.com>
Message-ID: <i4-dnX9BabMMCbDVnZ2dnUVZ_gCdnZ2d@comcast.com>

globalrev wrote:
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a ?crit :
>>
>>> wassup here?
>>> 7
>>> Traceback (most recent call last):
>>>   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
>>> <module>
>>>     print cust1.getID()
>>> AttributeError: 'NoneType' object has no attribute 'getID'
>>> class customer:
>> 1/ naming convention : class names should be CamelCased
>> 2/ unless you need compatibility with years old Python versions, use
>> newstyle classes
>>
>> class Customer(object):
>>
>>>     def __init__(self, ID, movies):
>>>         self.ID = ID
>>>         self.movies = movies
>> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>>
>>      def __init__(self, id, movies):
>>          self.id = id
>>          self.movies = movies
>>
>>>     def getID():
>>>         return self.ID
>>>     def getMovies():
>>>         return self.movies
>> 4/ Python has support for computed attributes, so you just don't need
>> these getters.
>>
>>
>>
>>> import os
>>> import customer
>>> import movie
>>> mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
>>> mv1str = mv1.read()
>>> print mv1str.count(',5,')
>>> cust1 = customer.__init__('12',['1','435','2332'])
>> __init__ is automagically called on instanciation, so you don't have to
>> call it yourself. And FWIW, your __init__ returns None.
>>
>> cust1 = Customer('12', ['1', '435', '2332'])
>>
>>> print cust1.getID()
>> print cust1.id
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 

You really should back up and go through the Python tutorial.

cust1.movies() tells Python to call the object pointed to by cust1.movies (note 
the parenthesis after .movies).  Since that object (in your case) is a list, 
that makes no sense (which is exactly what the traceback said).

print "cust", cust1.idnbr, cust1.movies

is what you want here.

-Larry


From exarkun at divmod.com  Tue May 13 20:56:03 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 20:56:03 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <f9cc40fa-20ff-4936-9ed0-0b6cad014ca3@y38g2000hsy.googlegroups.com>
Message-ID: <20080514005603.6859.2106502900.divmod.quotient.63149@ohm>

On Tue, 13 May 2008 16:44:11 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>
> [snip]
>>
>> To support scheduling calls, you just have to know when the next call is
>> going to happen.  Then, you can wake up at exactly that time.  This is
>> what Twisted does, even for select reactor. ;)
>
>Yes but how do you know when it's the time to fire up a call without
>using a thread?
>You are forced to call time.time() periodically and check if that time
>had come every time.
>Take a look at twisted/internet/base/ReactorBase.runUntilCurrent.
>That's where that should happen.
>

Why?  Isn't this why subtraction exists?  If there is a call scheduled to
happen at T1 and the current time is T2, then I know that after (T1 - T2)
elapses, it will be time to run the call.  Why do I have to do any checks
at all?  I just tell select() to wait that long.  Presumably this is just
what someone will do if they want to use asyncore with timed calls.  Call
asyncore.loop() in a loop, always passing (T1 - T2) as the timeout value.

So, actually, I'm not sure what the disagreement is about. ;)  The
default value for the timeout parameter to the loop function seems
somewhat irrelevant.  If someone wants timed events in their loop,
asyncore isn't standing in their way.  On the other hand, I didn't
this thread (or maybe just this part of the thread) start out with
a question about asyncore throughput?  I have no idea what that
might have to do with this.

Jean-Paul


From castironpi at gmail.com  Tue May 20 10:04:32 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 07:04:32 -0700 (PDT)
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<mailman.1361.1211228890.12834.python-list@python.org>
	<4dc24f2e-04f5-4ad6-b021-f416ef5c7415@z72g2000hsb.googlegroups.com>
	<8ebd28f1-887f-45c9-a35f-af9023b062ea@u12g2000prd.googlegroups.com> 
	<3629843a-ebcb-4f15-82f1-899500f7b91f@t54g2000hsg.googlegroups.com> 
	<20080519234214.beae9314.johnjsal@NOSPAMgmail.com>
	<Xns9AA470833CCA8duncanbooth@127.0.0.1>
Message-ID: <720e75d1-806e-4fb1-94f5-a1a9c6cae8c1@x41g2000hsb.googlegroups.com>

On May 20, 5:04?am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> John Salerno <johnj... at NOSPAMgmail.com> wrote:
> >>>> a = 'this is longer'
> >>>> b = 'this is longer'
> >>>> a == b
> > True
> >>>> a is b
> > False
>
> > In the above example, Python has created only one string called
> > 'hello' and both x and y reference it. However, 'this is longer' is
> > two completely different objects.
>
> That is true when run interactively, but the behaviour changes again if you
> run it as a script:
>
> C:\Temp>type t.py
> a = 'this is longer'
> b = 'this is longer'
> print a is b
>
> C:\Temp>t
> True
>
> In short, two equal strings may or may not be identical and any code which
> makes assumptions based on observed behaviour is broken. If you want to be
> able to test identity on strings safely then use the 'intern()' builtin to
> get repeatable behaviour.
>
> --
> Duncan Boothhttp://kupuguy.blogspot.com

Strictly speaking, identity is a real notion whereas equality is an
ideal (symbolic) notion.  There is no such thing as real true equals.
Furthermore, there are no true real symbols.  But, as puzzling as that
is:

'abc' == 'abc'
abc is abc

I argue that 'is' should never be used for primitives/literals.

a is 4  #bad
a is b  #good
a is 'abc' #bad
a is { None: None } #bad
a== { None: None } #good

Just good thing I don't have check-in priveleges, right? :)


From duncan.booth at invalid.invalid  Sun May  4 11:58:25 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 May 2008 15:58:25 GMT
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no>
Message-ID: <Xns9A94ACAB89668duncanbooth@127.0.0.1>

Szabolcs Horv?t <szhorvat at gmail.com> wrote:

> I thought that it would be very nice if the built-in sum() function used 
> this algorithm by default.  Has this been brought up before?  Would this 
> have any disadvantages (apart from a slight performance impact, but 
> Python is a high-level language anyway ...)?

There's a thread you might find interesting:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/9eda29faf92f532e/027cef7d4429aa3a

In that thread I suggested that Python ought to implement sum by adding 
together each pair of values, then each pair of results and so on. This 
means that for input values of a similar magnitude the intermediate results 
stay balanced. The implementation doesn't actually do all the first level 
sums first, it builds up a stack containing the sum of 2^k, 2^(k-1)...2 
values. Also it works for other types as well, and for strings or lists has 
the advantage of minimising the number of large string or list concatenations.

If you follow that thread far enough you'll find a post by Jussi Salmela 
which shows that summing adjacent pairs performs as well as Kahan summation
(he says 'almost as good' but in fact the only time they get different 
results the 'correct' answer is 500000.000005 and Kahan and sumpairs get 
the two nearest representable results either side: 500000.00000499998 and 
500000.00000500004 respectively).

I never did get round to re-coding my sumpairs() function in C, I would be 
interested to see just how much overhead it introduces (and I suspect it
would be faster than the existing sum in some cases such as for lists).


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 04:46:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 10:46:32 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <mailman.1431.1211387644.12834.python-list@python.org>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
Message-ID: <483532d6$0$5880$426a34cc@news.free.fr>

Daniel Fetchinson a ?crit :
>>>> Or just:
>>>>
>>>> If command is "quit" ...
>>> Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
>>> for assigning and checking types.  For example, to read data from a
>>> file and check for errors:
>>>
>>>      Read data from "input.txt".
>>>      If data is an error then go to ...
>> Arf ! A goto !
> 
> You are surely aware of the fact that the C source of python also uses
> goto at tons of places. Is that Arf! too?

C doesn't pretend to be anything else than a portable and a bit 
higher-level assembly. Nothing like FT.


From salgerman at gmail.com  Tue May 13 06:06:09 2008
From: salgerman at gmail.com (gsal)
Date: Tue, 13 May 2008 03:06:09 -0700 (PDT)
Subject: where to get McMillan Installer?
Message-ID: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>

There does not seem to be a valid url for the Installer, anywhere.
Could anyone provide me with a copy of it?

many thanks.


From swapsun at gmail.com  Wed May  7 09:02:29 2008
From: swapsun at gmail.com (swapsun at gmail.com)
Date: Wed, 7 May 2008 06:02:29 -0700 (PDT)
Subject: Learning question...
References: <d61b9c56-6f9a-4b29-9247-4fce0b80ecbe@f63g2000hsf.googlegroups.com>
	<a5fda5c5-6389-4d05-b9e0-39a303cadbb3@e53g2000hsa.googlegroups.com>
Message-ID: <15d5d855-e99d-4005-9830-7109d7908ab4@k10g2000prm.googlegroups.com>

On May 7, 8:42?am, Thomas Woelz <two... at gmail.com> wrote:
> On 7 maio, 09:25, swap... at gmail.com wrote:
>
> > Any idea why the following program does not work? I was learning IO on
> > Python and the following generates a TypeError: range() integer end
> > argument expected, got str.
> > I am a beginner.
>
> > ################################
> > # print input name (str k), j times using raw_input
>
> > def hello():
> > ? ? j=raw_input("Please type in the number of times you want to print
> > ")
> > ? ? k=raw_input("Please type in your name ")
>
> ? ? # add this:
> ? ? j = int(j)
>
> > ? ? printname(j,k)
>
> > def printname(j,k):
> > ? ? ? ? ? for i in range(j):
> > ? ? ? ? ? ? ? ? print ("Hello %s" % k)
> > ################################
>
> theres too much whitespace in the printname function, try to stick
> with 4 spaces (and no tabs) for each block

Thanks very much for the advice. Will follow...


From deets at nospam.web.de  Mon May 19 05:58:23 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 May 2008 11:58:23 +0200
Subject: Showing the method's class in expection's traceback
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
	<69bi20F31j4kdU1@mid.uni-berlin.de>
	<mailman.1337.1211191001.12834.python-list@python.org>
Message-ID: <69d1b2F31b7u7U1@mid.uni-berlin.de>

> 
> That by itself is not enough, the method could be inherited; one should
> walk the base classes in the MRO to find the right one. And deal with
> classmethods and staticmethods. And decorators that don't preserve meta
> information... Hmmm, I think it isn't so trivial as it seems.

You might even have an instance-unique method. But I think the OP is
satisfied with a 90%-solution.

Diez


From tarun.kap at gmail.com  Fri May  2 16:26:58 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Fri, 2 May 2008 13:26:58 -0700 (PDT)
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
	<yKGdnfqgFpoi94bVnZ2dnUVZ_qfinZ2d@comcast.com>
	<6ac548f4-0c96-4bd4-a6e1-9332f3093ad6@y38g2000hsy.googlegroups.com>
Message-ID: <7334e775-e9c2-473f-96b5-138efaf9bf5b@x35g2000hsb.googlegroups.com>

On May 2, 2:49 pm, Jeff <jeffo... at gmail.com> wrote:
> The generally used idiom for that is:
>
> lst = ['a', 'b', 'c']
> if 'a' in lst:
>   foo = lst.index('a')

Jeff - Gracias !!

I am fairly new to python. Thanks for the example code snippet above.
It is the same amount of code as receiving -1 and then checking for
doing an "if else" for -1 so now i don't feel bad. But, being new to
this paradigm, raising of an exception when it can't find the element
appears to be weird to me for some unexplainable reason.


From bruno.desthuilliers at gmail.com  Thu May 22 14:43:09 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Thu, 22 May 2008 11:43:09 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
Message-ID: <6898aed7-cae0-4116-b60b-b6015daef4bf@f63g2000hsf.googlegroups.com>

On 22 mai, 18:14, cm_gui <cmg... at gmail.com> wrote:
> Python is slow.

Oh, a troll...

>   Almost all of the web applications written in
> Python are slow.   Zope/Plone is slow, sloow, so very slooow.  Even
> Google Apps is not faster.   Neither is Youtube.
> Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> than Python.
> Okay, they probably use caching or some code compilation -- but Google
> Apps and those Zope sites probably also use caching.
>
> I've yet to see a web application written in Python which is really
> fast.

Err, a very bad troll actually. Trop gros, passera pas.


From fepeacock at googlemail.com  Sat May 24 06:53:04 2008
From: fepeacock at googlemail.com (fepeacock at googlemail.com)
Date: Sat, 24 May 2008 03:53:04 -0700 (PDT)
Subject: Partial download with ftplib and retrbinary
Message-ID: <9dd32f80-ce21-4c2c-8eba-1afd3b80379f@x41g2000hsb.googlegroups.com>

I am breaking/interrupting my connection with the ftp server at
present when doing a partial download of a file. I have a callback
with retrbinary that raises an exception and ends the download. The
problem is that the server is not notified and hangs. I cannot send
any further commands and need to relogin to download further. Is there
a way to still continue downloading without having to login again.

My retrbinary function is:

ftp.retrbinary('RETR '+file, handleDownload,1,bound[0])

where bound[0] is an integer specifying the start byte of the
download.

My callback is:

def handleDownload(block):
    global count,localfile,number
    localfile.write(block)
    if count==number:
            raise(Exception)
    count=count+1

where number specifies the number of bytes to download.

Help would be gratefully received.


From python at bdurham.com  Sun May 25 09:20:16 2008
From: python at bdurham.com (python at bdurham.com)
Date: Sun, 25 May 2008 09:20:16 -0400
Subject: Coverage checker: Coverage.py or pycover or ?
Message-ID: <1211721616.16886.1254972999@webmail.messagingengine.com>

Looking for feedback from people using a coverage checking utility. I've
found two - wondering if there's any feature that would recommend one of
these utilities vs. another (or argue for the use of both utilities).

Coverage.py
http://nedbatchelder.com/code/modules/coverage.html

and

Pycover
http://www.geocities.com/drew_csillag/pycover.html

Thanks,
Malcolm


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 05:29:48 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 11:29:48 +0200
Subject: Classmethods are evil
In-Reply-To: <g0llbe$2k6o$1@news.mtu.ru>
References: <g0llbe$2k6o$1@news.mtu.ru>
Message-ID: <4831488c$0$10799$426a74cc@news.free.fr>

Ivan Illarionov a ?crit :
> After re-reading "Python is not Java" I finally came to conclusion that 
> classmethods in Python are a very Bad Thing. 
 >
> I can't see any use-case of them that couldn't be re-written more clearly 
> with methods of metaclass or plain functions.

Plain functions don't give you polymorphic dispatch and can't be 
overriden. Using metaclass methods requires a custom metaclass, which 1/ 
adds boilerplate code and cognitive load and 2/may bring problems, 
specially wrt/ MI.

> They have the following issues:
> 1. You mix instance-level and class-level functionality in one place 
> making your code a mess.

May I remind you that every name defined at the top-level of a class 
statement becomes a class attribute ?

Anyway : most of the use case I've had so far for classmethods required 
collaboration between the instance and the class, and I definitively 
prefer to have related functionalities defined in one place.

> 2. They are slower than metaclass methods or plain functions.

Slower than plain functions, indeed - but so are instancemethods. Slower 
that metaclass methods ? I never benchmarked this, but I don't see any 
reason that should be the case. Anyway, you could also argue that 
properties are slower than plain attributes, which are slower than local 
vars etc...

> I really want to hear your opinions on the subject.


Mine is that classmethods are a GoodThing that make simple thing easy.



From martin at v.loewis.de  Fri May 23 16:00:30 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 23 May 2008 22:00:30 +0200
Subject: Reloading function obtained via 'from xxx import yyy'
In-Reply-To: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
References: <s4FZj.147599$Tj3.95282@en-nntp-02.dc1.easynews.com>
Message-ID: <4837225e$0$5507$9b622d9e@news.freenet.de>

> ...and I'd like to reload testFunc.  How do I do so?  'from test import 
> testFunc' keeps the old definition around, and 'reload test' of course doesn't 
> work becayse I didn't use 'import test' in the first place.

Try all three of them, in sequence:

import test
reload(test)
from test import testFunc
del test

If you absolutely don't want to import test, write

reload(sys.modules['test'])
from test import testFunc

OTOH, if you reload often, consider not using from-import at all.

Regards,
Martin


From roy at panix.com  Sat May  3 16:11:08 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 03 May 2008 16:11:08 -0400
Subject: IPv6 and Python
References: <39b4d18b-2fa7-4c8f-aee5-8c3522158d1f@j22g2000hsf.googlegroups.com>
	<481B6E7C.2020602@v.loewis.de>
	<80747335-9d08-48c9-bcc6-e66b6f2ef656@l42g2000hsc.googlegroups.com>
	<roy-28CD32.23383902052008@70-1-84-166.area1.spcsdns.net>
	<81e98a78-bc50-4800-981d-908bf14305bb@z72g2000hsb.googlegroups.com>
Message-ID: <roy-ECFEBB.16110803052008@70-1-84-166.area1.spcsdns.net>

In article "Giampaolo Rodola'" <gnewsg at gmail.com> wrote:

> I would be very interested in taking a look at how you implemented
> that part of code. Would it be possible?

Sadly, no.  It's proprietary code.  But, it's really not that complicated 
to reconstruct, once you know the basic idea.  You have a DualSocket class 
whose constructor creates two sockets.  It exposes (roughly) the same 
interface as a socket object, but decides which underlying 
protocol-specific socket to delegate to based on the address family of the 
sockaddr you give it.

Oh, yeah, this was done in C++, but there's nothing really that's language 
specific in the implementation.


From mail.ilocke at gmail.com  Fri May  9 07:46:00 2008
From: mail.ilocke at gmail.com (ivan)
Date: Fri, 9 May 2008 04:46:00 -0700 (PDT)
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
Message-ID: <2702e944-47ce-4c8e-a674-61d92e2597c7@a23g2000hsc.googlegroups.com>

Not related (except that it is about python and ArcGIS): Remember you
can set PYTHONINSPECT to enter interactive mode at the end of a
script. With a script set as an ArcGIS tool, you can then enter
interactive to play around or debug with all the ArcGIS stuff loaded.

Is there a better way people do this?

Ivan


From duncan.booth at invalid.invalid  Thu May 22 04:33:42 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 08:33:42 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<48343e56$0$5866$426a74cc@news.free.fr>
	<mailman.1431.1211387644.12834.python-list@python.org>
	<87ej7voao9.fsf@physik.rwth-aachen.de>
Message-ID: <Xns9AA6609349A5Bduncanbooth@127.0.0.1>

Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:

>>>>      Read data from "input.txt".
>>>>      If data is an error then go to ...
>>>
>>> Arf ! A goto !
>>
>> You are surely aware of the fact that the C source of python also uses
>> goto at tons of places. Is that Arf! too?
> 
> In the hands of a skilled person who really knows what he/she does,
> it can be a useful statement.  But this collides with the goals of
> FT, which claims to be simple to use.  Besides, the above use case
> for a goto is definitively awful.
> 

My problem with the code isn't so much the 'go to', its the idea that you 
have to check the result of the read. That implies that any unchecked 
errors will go undetected. Ick.

-- 
Duncan Booth http://kupuguy.blogspot.com


From spdegabrielle at gmail.com  Thu May  1 18:15:32 2008
From: spdegabrielle at gmail.com (spdegabrielle)
Date: Thu, 1 May 2008 15:15:32 -0700 (PDT)
Subject: pil:effbot and pythonware offline
Message-ID: <8a2150b5-dfbf-419b-af10-af88932584ff@8g2000hse.googlegroups.com>

Sorry, I'm new to python and was trying to get imageTK;
this led me to try find PIL, but pythonware and effbot both seem to be
offline.

I can't find any mention of an outage on python.org, this newsgroup,
or the planet-blogs.

Is it just me? and does anyone know where I can find ImageTK?

Cheers,

stephen


From bockman at virgilio.it  Tue May 27 13:46:08 2008
From: bockman at virgilio.it (Francesco Bochicchio)
Date: Tue, 27 May 2008 19:46:08 +0200
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
Message-ID: <pan.2008.05.27.17.46.08.159260@virgilio.it>

On Tue, 27 May 2008 01:31:35 -0700, Alex Gusarov wrote:

> Hello, I have strong .NET background with C# and want to do some
> familiar things from it with Python, but don't know how. For example,
> I created form in qt designer with QCalendarWidget, translated it into
> Python module and want to overload virtual method paintCell of
> QCalendarWidget. In C# I can write following (abstract) code:
> 
> this.calendar.PaintCell += new PaintEventHandler(myPaintCellHandler);
> 
> void myPaintCellHandler(object sender, PaintEventArgs e) {
>     // some work here
> }
> 
> I can't find how I can do similar thing in Python without inheriting
> QCalendarWidget and overloading this method in inherited class (it's
> long and I must create additional class). The only thing I done its
> full replacement of handler:
> 
> calendar.paintCell = myPaintCell
> 
> def myPaintCell(self):
>     pass
> 

It is more a matter of the GUI toolkit you are using rather than the
language. In Python, they are many, but they are not as tighty integrated
with the language as in C#. Also, Python has a no standard support for
event handling, but again several non-standard library (e.g. twisted ) and
plus you can relatively easily cook your own recipe, has other posters
have shown you.

Anyway, IIRC (it's a long time since I used Qt), QT allows to connect 
 more than one slot with the same signal, so you should not need to
subclass or to create your own multi-dispatcher. Just doing:

calendar.paintCell.signal( SOME_SIGNAL_NAME, my_paint_method ) 

should work. I don't know which signal you should connect to, however.

This link gives you some detail on signal/slots in PyQT:

http://www.commandprompt.com/community/pyqt/x1408

Ciao
-----
FB


From python at bdurham.com  Tue May 20 16:01:55 2008
From: python at bdurham.com (python at bdurham.com)
Date: Tue, 20 May 2008 16:01:55 -0400
Subject: List of disk drives on Windows?
In-Reply-To: <aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>
References: <2008052013180816807-bob@passcalnmtedu>
	<aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>
Message-ID: <1211313715.3431.1254212467@webmail.messagingengine.com>

Mensanator,

<snip>
>>> import os.path
>>> dl = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
>>> drives = ['%s:' % d for d in dl if os.path.exists('%s:' % d)]
>>> drives
</snip>

Very clever!

Malcolm


From robert.kern at gmail.com  Mon May  5 13:21:49 2008
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 05 May 2008 12:21:49 -0500
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1>
	<op.uanmx1u7x6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <fvnfni$qjl$1@ger.gmane.org>

Gabriel Genellina wrote:
> Python doesn't require __add__ to be associative, so this should not be used as a general sum replacement. But if you know that you're adding floating point numbers you can use whatever algorithm best fits you. Or use numpy arrays; I think they implement Kahan summation or a similar algorithm.

No, we do a straightforward sum, too. Less magic in the default case.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco



From ggpolo at gmail.com  Sat May 10 08:27:46 2008
From: ggpolo at gmail.com (Guilherme Polo)
Date: Sat, 10 May 2008 09:27:46 -0300
Subject: People still using Tkinter?
In-Reply-To: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
References: <EC0AAEB0-8282-48A0-A24C-BB2DD28F2F14@sbcglobal.net>
Message-ID: <ac2200130805100527g384a808p65cbf31b9f0eb96b@mail.gmail.com>

2008/5/10 Kenneth McDonald <kenneth.m.mcdonald at sbcglobal.net>:
> Any guesses as to how many people are still using Tkinter? And can anyone
> direct me to good, current docs for Tkinter?
>

I will say no to the first question.

Now about the second question.. there are these links you may find interesting:

"An Introduction to Tkinter" --
http://www.pythonware.com/library/tkinter/introduction/index.htm
"Tkinter reference: a GUI for Python" --
http://infohost.nmt.edu/tcc/help/pubs/tkinter/index.html

There is also a book, http://www.manning.com/grayson/ and a wiki,
http://tkinter.unpythonic.net/wiki/
Also, stdlib docs at http://docs.python.org/lib/module-Tkinter.html

And there is a mail list too.

> Thanks,
> Ken
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
-- Guilherme H. Polo Goncalves


From tarun.kap at gmail.com  Thu May 22 14:38:05 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Thu, 22 May 2008 11:38:05 -0700 (PDT)
Subject: 2 different versions of python compiling files.
Message-ID: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>

I am trying to upgrade from python 2.3 to 2.4 but not all machines can
be upgraded. Can you guys tell me if this scenario is possible.

1. Any machine that uses .py files that use libraries that require 2.4
will have 2.4 on it.
2. rest of the machines will have 2.3

now there is a shared drive. lets say i write a new library called
testlib.py and put it on the shared drive .. when a script uses it
from a 2.4 based machine, it will generate a testlib.pyc and leave it
on the shared drive. going forward that .pyc is used until the
original lib is changed. now lets say a 2.3 based machine is trying to
use that lib. it will try to use that pyc file which was compiled by
py2.4. will it work or crash ?

not sure if i did a good job on explaining my scenario.


From martin at v.loewis.de  Sun May 25 04:07:57 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 May 2008 10:07:57 +0200
Subject: need some help in serving static files inside a wsgi apps
In-Reply-To: <g19q1l$pd5$01$1@news.t-online.com>
References: <6e15240b-520d-4f01-9d21-83f9feeefc2d@x41g2000hsb.googlegroups.com>
	<69qmhcF33pou1U1@mid.uni-berlin.de>
	<48382917$0$20800$426a74cc@news.free.fr>
	<69r113F34rbeeU1@mid.uni-berlin.de>
	<g19q1l$pd5$01$1@news.t-online.com>
Message-ID: <48391E5D.5050106@v.loewis.de>

> I guess, Apache does some kind of memory caching for files, which are often
> requested and small enough to fit into the system memory. 

Are you sure about this? I could not find anything in the documentation
(other than mod_cache and friends, which is an unrelated functionality).
Also, I don't see the need for Apache to cache frequently requested
files itself. Instead, the operating system will cache frequently
requested directories and files in memory, and it will do the same for
a Python web server.

Regards,
Martin


From http  Tue May  6 15:02:21 2008
From: http (Paul Rubin)
Date: 06 May 2008 12:02:21 -0700
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org>
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au>
	<8763tr5ov1.fsf@gmail.com>
Message-ID: <7xprrz2r42.fsf@ruckus.brouhaha.com>

vivainio at gmail.com (Ville M. Vainio) writes:
vivainio at gmail.com (Ville M. Vainio) writes:
> I don't think BSD/MIT like license really annoys anyone. Think python
> here ;-)

Python's non-GPL license certainly is annoying to some of us.


From workitharder at gmail.com  Sat May 24 02:01:10 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 23:01:10 -0700 (PDT)
Subject: why is com-prompt faster and how do i start at cprompt at mydir/ 
	?
References: <c7ba440a-27d9-4a97-bc26-907da8a7cc26@a70g2000hsh.googlegroups.com>
	<878wy0cqg6.fsf@benfinney.id.au>
	<8e5e9da7-4255-4f38-b32b-04723be46b9a@y38g2000hsy.googlegroups.com>
	<87mymgb8hn.fsf@benfinney.id.au>
	<5def9628-1332-4c18-b123-e5eef1a810d1@t54g2000hsg.googlegroups.com>
Message-ID: <7f1595a7-0417-448d-9422-9e9edaba97b9@p39g2000prm.googlegroups.com>

On May 23, 10:18?pm, notnorweg... at yahoo.se wrote:
> On 24 Maj, 07:01, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>
>
>
> > notnorweg... at yahoo.se writes:
> > > On 24 Maj, 05:48, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > > wrote:
> > > > Can you tell us exactly which programs you mean when you say "the
> > > > shell" and "the commandprompt"?
>
> > > commandprompt = windows dos-windows
>
> > > shell = standard python interactive prompt
>
> > Thanks.
>
> > Be aware that referring to "the shell" without further qualification
> > is usually understood to mean "the operating system shell", i.e. the
> > command shell provided for running operating system commands.
>
> > So, you're asking about the difference in behaviour between "the
> > Windows command shell" versus "the Python interactive shell".
>
> > --
> > ?\ ? ? ? ??I cannot conceive that anybody will require multiplications |
> > ? `\ ? ? ? ? ?at the rate of 40,000 or even 4,000 per hour ...? ?F. H. |
> > _o__) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Wales, 1936 |
> > Ben Finney
>
> yes

There's also the IDLE interactive shell, which is definitely slower,
and I suspect this is what he's talking about. If you run 'python.exe'
from the windows C: prompt is it still slow?


From geoldr at gmail.com  Thu May 22 14:38:05 2008
From: geoldr at gmail.com (Geoldr)
Date: Thu, 22 May 2008 11:38:05 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com>
Message-ID: <26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com>

On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > Hello all, I have written a simple program, and at the end of it,
> > instead of it closing I would like it to restart from the beggining.
> > Is there a way to do this? Put my code into a class function, or
> > something?
> > I guess I could do a while loop, but I think if there is a way to run
> > my code if it's in a class would be an easier option. I can't seem to
> > find many guides online but maybe I have not been looking in the right
> > places.
>
> > Anybody have any ideas?
>
> Putting your code in a function or class is probably the way to go.
> When I was doing C++, we'd just use a while loop for simple stuff,
> though.
>
> It really shouldn't be all that hard to tell the code to call up the
> beginning of the program again.
>
> Mike

That's what I am trying to figure out, but it doesn't seem to work. Do
you have any example code of classes/functions that work for you?


From tdahsu at gmail.com  Thu May 22 14:03:48 2008
From: tdahsu at gmail.com (tdahsu at gmail.com)
Date: Thu, 22 May 2008 11:03:48 -0700 (PDT)
Subject: Code For Five Threads To Process Multiple Files?
References: <8ddc1f4d-b6c1-4380-baaa-ab7e58d980ad@f36g2000hsa.googlegroups.com>
	<slrng38f1m.2j3.hat@se-162.se.wtb.tue.nl>
	<e150a775-99cb-4b7a-858e-83c794805a28@e39g2000hsf.googlegroups.com>
Message-ID: <46a05430-18c9-4383-a22f-2006036842dd@d45g2000hsc.googlegroups.com>

On May 21, 11:41?am, tda... at gmail.com wrote:
> On May 21, 11:13?am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>
>
>
> > On 2008-05-21, tda... at gmail.com <tda... at gmail.com> wrote:
>
> > > I'd appreciate any help. ?I've got a list of files in a directory, and
> > > I'd like to iterate through that list and process each one. ?Rather
> > > than do that serially, I was thinking I should start five threads and
> > > process five files at a time.
>
> > > Is this a good idea? ?I picked the number five at random... I was
>
> > Depends what you are doing.
> > If you are mainly reading/writing files, there is not much to gain, since 1
> > process will already push the disk IO system to its limit. If you do a lot of
> > processing, then more threads than the number of processors is not much use. If
> > you have more 'burtsy' behavior (first do lot of reading, then lot of
> > processing, then again reading, etc), then the system may be able to do some
> > scheduling and keep both the processors and the file system busy.
>
> > I cannot really give you advice on threading, I have never done that. You may
> > want to consider an alternative, namely multi-tasking at OS level. If you can
> > easily split the files over a number of OS processes (written in Python), you
> > can make the Python program really simple, and let the OS handle the
> > task-switching between the programs.
>
> > Sincerely,
> > Albert
>
> Albert,
>
> Thanks for your response - I appreciate your time!
>
> I am mainly reading and writing files, so it seems like it might not
> be a good idea. ?What if I read the whole file into memory first, and
> operate on it there? ?They are not large files...
>
> Either way, I'd hope that someone might respond with an example, as
> then I could test and see which is faster!
>
> Thanks again.

Ah, well, I didn't get any other responses, but here's what I've done:

loopCount = 0
                for l in range(len(self.filesToProcess)):
                    threads = []
                    try:
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+l])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+2])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+3])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+4])))
 
threads.append(threading.Thread(target=self.processFiles(self.filesToProcess[loopCount
+5])))
                        msg = "Processing file...\n"
                        for thread in threads:
                            wx.CallAfter(self.textctrl03.write(msg),
thread.start())
                        for thread in threads:
                            thread.join()
                        loopCount += 5
                    except IndexError:
                        pass

It works, and it works well.  It starts five threads, and processes
five files at a time.  (In the "self.processFiles" I read the whole
file into memory using readlines(), which works well.)

Of course, now the wx.CallAfter function doesn't work... I get
"TypeError: 'NoneType' object is not callable" for every time it is
run...


From asdf at asdf.com  Wed May 28 18:20:10 2008
From: asdf at asdf.com (asdf)
Date: 28 May 2008 22:20:10 GMT
Subject: Python's tail -f implementation for remote files
Message-ID: <483dda9a$0$11598$607ed4bc@cv.net>

Basically what i want to do is to read a file
that is being constantly appended to but which
is located on a remote server.
I found this for doing BASH's tail -f in python:

import os
tailoutputfile = os.popen('tail -f syslog')
while 1:
    line = tailoutputfile.readline()
    if len(line)==0:   # change the termination condition 
        break
    process_line(line)

and it works great. But not sure how to use this with
ssh command to connect to remote machine.

Any tips?


From miller.paul.w at gmail.com  Sun May 25 22:50:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 19:50:39 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
Message-ID: <9cd9df2e-6f4c-4fb0-8714-1c45896d1d9a@e53g2000hsa.googlegroups.com>

On May 24, 9:41?am, Sh4wn <luckyluk... at gmail.com> wrote:


> Python advertises himself as a full OOP language, but why does it miss
> one of the basic principles of OOP? Will it ever be added to python?

Others have already answered this directly, but I'd like to mention
that languages I know of which have this feature also have a feature
for getting around it.  (e.g. C++ and friend classes) I don't know
about you, but I don't want features in the language that make me want
to circumvent them. Do you?


From vivainio at gmail.com  Wed May  7 03:46:37 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Wed, 7 May 2008 00:46:37 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<232ee177-a5c9-488f-921e-cd6ecb5ff3ed@b1g2000hsg.googlegroups.com>
Message-ID: <5f383446-4a77-4a3c-933e-bedc538dc495@b1g2000hsg.googlegroups.com>

On May 6, 11:27 pm, hdante <hda... at gmail.com> wrote:

>  GPL can mix with other free software licenses, so people who write
> BSD code and do not wish to remain BSD clean are free to use GPL'd
> code. That's the important point.

No, it can't. It can only mix through aggregation, i.e. you can ship a
GPL'd "plugin" with BSD code as long as you don't import the plugin
directly.

Here's a real life example from ipython:

- Core IPython is BSD clean, and we intend to leave it that way
- If we imported a gpl'd module in some core ipython component, the
core component would be gpl (or something equally restrictive) as
well, through viral nature of the license
- Now, if you want a BSD-clean version of ipython (say, to embed it in
a commercial program - with which I have absolutely *no* problem, and
can only see good things coming from it), you would have to gleam out
all the uses of that module from the source code. Not very fun, esp.
if it's something important
- There is a GPL'd module in "extensions" folder of IPython, ipy_bzr
(that is because of bzrlib). It's never imported anywhere in ipython
source code, but the user can import it in ipy_user_conf.py. This
"contaminates" the config file and subsequently ipython (because it's
imported into python interpreter ipython is running on), but luckily
the user can opt out from importing it if he wishes to remain BSD
clean. Or he can delete the file altogether if he wishes.

Without GPL, none of this hair-splitting is necessary.

I guess I could have gone the Carl Banks route and just say "It scares
away some people". Consider my replies here an elaborate way of saying
the very same thing.


From yxs046 at gmail.com  Sun May 11 22:48:50 2008
From: yxs046 at gmail.com (yxs046 at gmail.com)
Date: Sun, 11 May 2008 19:48:50 -0700 (PDT)
Subject: Corum Bubble Diamond Steel Pink Ladies Watch 196-151-47-0F08-PN96S
Message-ID: <9ce075f4-900c-4409-9a9c-98f646f5dba9@i36g2000prf.googlegroups.com>

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From grante at visi.com  Sat May 24 12:36:36 2008
From: grante at visi.com (Grant Edwards)
Date: Sat, 24 May 2008 11:36:36 -0500
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <78ydnZ2UHo2J2aXVnZ2dnUVZ_jOdnZ2d@posted.visi>

On 2008-05-23, Johannes Bauer <dfnsonfsduifb at gmx.de> wrote:

> I'm just starting with Python and am extremely unexperienced with it so 
> far. Having a strong C/C++ background, I wish to do something like
>
> if (q = getchar()) {
> 	printf("%d\n", q);
> }
>
> or translated to Python:
>
> if (p = myfunction()):
> 	print p
>
> However, this "assignment and comparison" is not working. What's the 
> "Python way" of doing this kind of thing?

  p = myfunction()
  if p:
    print p    

In Python, assignment isn't an operator, it's a statement.  The
condition in an if/while has to be an expression, not a
statement.

-- 
Grant



From paul.hankin at gmail.com  Wed May 28 06:46:57 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 28 May 2008 03:46:57 -0700 (PDT)
Subject: A quick question
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <d261cbbd-f971-42ca-b1a3-e4a246f6df77@j22g2000hsf.googlegroups.com>

On May 28, 11:25 am, "James" <cobro... at msn.com> wrote:
> word = raw_input("Type a word:")
> start = len(word)
>
> for letter in range(start, 0, -1):
>     print letter

Hi James,

for letter in reversed(word):
    print letter

--
Paul Hankin


From ivlenin at gmail.com  Sun May 25 16:07:15 2008
From: ivlenin at gmail.com (I V)
Date: Sun, 25 May 2008 20:07:15 GMT
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
	<mailman.1569.1211731554.12834.python-list@python.org>
Message-ID: <TFj_j.4171$mh5.785@nlpi067.nbdc.sbc.com>

On Sun, 25 May 2008 13:05:31 -0300, Gabriel Genellina wrote:
> Use a list, and the bisect module to keep it sorted:

That's worth doing if you need the data to be sorted after each insert. 
If the OP just needs the data to be sorted at the end, using a data 
structure with fast inserts (like a set) and then sorting at the end will 
likely be faster.


From kerstin.viltersten at semcon.com  Tue May 27 07:58:08 2008
From: kerstin.viltersten at semcon.com (Giraffe)
Date: Tue, 27 May 2008 04:58:08 -0700 (PDT)
Subject: Problems with Python IDLE
References: <2fc399e1-3cf3-43fa-ad95-55bc06b62ea1@e53g2000hsa.googlegroups.com>
	<g1gm5p$l5k$03$1@news.t-online.com>
Message-ID: <c129a3be-d34b-4a94-8cdf-71ddeb18d57a@p25g2000hsf.googlegroups.com>

> You probably start idle with the -n option. ...

> ?        ...If your code has been modified, you must reload() the affected
>          modules and re-import any specific items (e.g. from foo import baz)
>          if the changes are to take effect...

> If you use a shortcut to start IDLE, remove the -n option and you should be
> OK.

Thanks! I?ll try that!



From s0suk3 at gmail.com  Tue May 20 14:01:24 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Tue, 20 May 2008 11:01:24 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<027e0bd9$0$26878$c3e8da3@news.astraweb.com>
Message-ID: <3df3897e-f75e-4447-9142-398763f10c2f@56g2000hsm.googlegroups.com>

On May 20, 12:22 pm, "John Salerno" <johnj... at NOSPAMgmail.com> wrote:
> "Paul McGuire" <pt... at austin.rr.com> wrote in message
>
> news:b56a93ee-b177-44fb-927a-1e204f491639 at t54g2000hsg.googlegroups.com...
> On May 20, 10:50 am, s0s... at gmail.com wrote:
>
> > def compress(s):
> > return list(set(s))
>
> > That does the trick.
>
> Wow, I just *knew* there had to be some built-in function that would make
> this problem trivial! :)
>
> Only if order does not need to be maintained.  list(set(s)) will not
> necessarily keep the unique characters in the order they are seen.
> We'll have to check with the OP to see if this is important (I just
> assumed that it was because of the use of list comps).
>
> Good point. For me it doesn't matter because it wasn't my problem
> originally. I just had a question about the list comp. But if order matters,
> then I guess set doesn't work?

Yeah, it doesn't work. I didn't know that detail about sets until now
(like dicts, you can't expect the order to remain the same). I also
forgot that you were joining the list, so the return statement would
have looked like "return ''.join(set(s))", but you have to go with the
list comprehension if you want it to keep the same order.


From pydev at rscorp.ab.ca  Thu May  1 10:44:27 2008
From: pydev at rscorp.ab.ca (Scott SA)
Date: Thu,  1 May 2008 08:44:27 -0600
Subject: Signals/Slots support in Python
Message-ID: <r02010500-1049-1A0CE734178D11DDBA5A001124863F5E@[192.168.69.98]>

On 5/1/08, Brian Vanderburg II (BrianVanderburg2 at aim.com) wrote:

>I don't know if any such support is already built in, so I ended up 
>making my own simple signals/slots like mechanism.  If anyone is 
>interested then here it is, along with a simple test.  It can connect to 
>normal functions as well as instance methods.  It also supports weak 
>connections where when an object is gone, the slot is gone as well, the 
>slot just holds a weak reference to the object.

Did you review this?
    <http://pydispatcher.sourceforge.net/>

from what I understand is originally based upon this:
    <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87056>

and subsequently integrated into this:
    <http://djangoproject.com>

>-----
># Begin Signal
>import weakref
>import random
>
>class Signal:
>    class Slot:
>        def __init__(self, fn):
>            self.__fn = fn
>
>        def __call__(self, accum, *args, **kwargs):
>            result = self.__fn(*args, **kwargs)
>            return accum(result)
>
>    class WeakSlot:
>        def __init__(self, conn, parent, fn, obj):
>            self.__conn = conn
>            # Avoid circular references so deleting a signal will
>            # allow deletion of the signal since the slot doesn't ref
>            # back to it but only weakefs back to it
>            self.__parent = weakref.ref(parent)
>            
>            self.__fn = fn
>            self.__obj = weakref.ref(obj, self.Cleanup)
>
>        def __call__(self, accum, *args, **kwargs):
>            obj = self.__obj()
>            if obj is None:
>                return True
>                    
>            result = self.__fn(obj, *args, **kwargs)
>            return accum(result)
>
>        def Cleanup(self, ref):
>            parent = self.__parent()
>            if parent is not None:
>                parent.Disconnect(self.__conn)
>            
>    class Accumulator:
>        def __call__(self, *args, **kwargs):
>            return True
>            
>        def Finalize(self):
>            return None
>
>    def __init__(self):
>        self.__slots = [ ]
>        
>    # This connects a signal to a slot, but stores a strong reference so
>    # The object will not be deleted as long as the signal is connected
>    def Connect(self, fn):
>        conn = self.NewConn()
>        self.__slots.append([conn, Signal.Slot(fn)])
>        return conn
>        
>    # This connects a signal to a slot, but store a weak reference so
>    # when the object is gone the slot will not be called.  Because of
>    # the implemenations, it is not possible to do WeakConnect(obj.Fn),
>    # since obj.Fn is a new object and would go to 0 refcount soon after
>    # the call to WeakConnect completes.  Instead we must do a call as
>    # WeakConnect(ObjClass.Fn, obj)
>    # Only the object is weak-referenced.  The function object is still
>    # a normal reference, this ensures that as long as the object exists
>    # the function will also exist.  When the object dies, the slot will
>    # be removed
>    def WeakConnect(self, fn, obj):
>        conn = self.NewConn()
>        self.__slots.append([conn, Signal.WeakSlot(conn, self, fn, obj)])
>        return conn
>        
>    # Disconnect a slot
>    def Disconnect(self, conn):
>        result = self.Find(conn)
>        if result >= 0:
>            del self.__slots[result]
>            
>    # Disconnect all slots
>    def DisconnectAll(self):
>        self.__slots = [ ]
>        
>    # Create an accumulator.  Accumulator will be called as a callable
>    # for each return value of the executed slots.  Execution of slots
>    # continues as long as the reutrn value of the accumulator call is
>    # True.  The 'Finalize'function will be called to get the result
>    # A custom accumulator can be created by deriving from Signal and
>    # Creating a custom 'Accumulator' class, or by deriving from Singal
>    # and creating CreateAccumulator
>    def CreateAccumulator(self):
>        return self.Accumulator()
>
>    # Execute the slots
>    def __call__(self, *args, **kwargs):
>        accum = self.CreateAccumulator()
>        for conn in xrange(len(self.__slots)):
>            if not self.__slots[conn][1](accum, *args, **kwargs):
>                break
>        return accum.Finalize()
>            
>    # Create a connection name
>    def NewConn(self):
>        value = 0
>        while self.Find(value) >= 0:
>            value = random.randint(1, 100000000)
>        return value
>        
>    def Find(self, conn):
>        for i in xrange(len(self.__slots)):
>            if self.__slots[i][0] == conn:
>                return i
>                
>        return -1
>
># End Signal
>
>def fn1():
>    print "Hello World"
>    
>def fn2():
>    print "Goodbye Space"
>    
>class O:
>    def __init__(self, value):
>        self.value = value
>        
>    def Action(self):
>        print "O %d" % self.value
>        
>a = Signal()
>
>a.Connect(fn1)
>a.Connect(fn2)
>
>print "Part 1"
>a()
>
>a.DisconnectAll()
>
>o1 = O(4)
>o2 = O(12)
>
>a.WeakConnect(O.Action, o1)
>a.Connect(o2.Action)
>
>print "Part 2"
>a()
>
>print "Part 3"
>o1 = None
>a()
>
>print "Part 4"
>o2 = None
>a()
>
>a.DisconnectAll()
>
>def f1():
>    print "Hello Neighbor"
>    
>def f2():
>    print "Back to Work"
>    
>c1 = a.Connect(f1)
>c2 = a.Connect(f2)
>
>print "Part 5"
>a()
>
>print "Part 6"
>a.Disconnect(c2)
>a()
>
>a.DisconnectAll()
>
>def f1(name):
>    print "Hello %s" % name
>    
>def f2(name):
>    print "Goodbye %s" % name
>    
>a.Connect(f1)
>a.Connect(f2)
>
>print "Part 7"
>#a() # Error
>a("Sarah")
>
>a.DisconnectAll()
>
>class MySignal(Signal):
>    class Accumulator:
>        def __init__(self):
>            self.value = 0
>        def __call__(self, value):
>            self.value += value
>            return bool(value != 0)
>        def Finalize(self):
>            return self.value
>            
>
>def f1(x):
>    return x * x
>    
>def f2(x):
>    return x + x
>    
>def f3(x):
>    return 0
>    
>a = MySignal()
>a.Connect(f1)
>a.Connect(f2)
>a.Connect(f3)
>
>print "Part 8"
>print a(5)
>
>
>-----
>--
>http://mail.python.org/mailman/listinfo/python-list


From ludwigbrinckmann at gmail.com  Sat May 10 17:08:36 2008
From: ludwigbrinckmann at gmail.com (Ludwig)
Date: Sat, 10 May 2008 22:08:36 +0100
Subject: Python, are you ill?
In-Reply-To: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <3f7a6e1c0805101408j69f325c4mf1b3e480bc77ec2@mail.gmail.com>

This is not a bug, this is how it should work.

A triple quoted string ends only with another triple quoted string (which
can extend over multiple lines) In your example you are escaping the first
quote character at the end of the line, thus leaving just two quotes that do
not end the string.
Another """ (triple quote) will terminate the string.

HTH


2008/5/10 <wxPythoner at gmail.com>:

> If you are in the interactive prompt of the Python interpreter and you
> do this
>
> print """Testing\"""   or   print '''Testing\'''
>
> you get three dots [...] as if Python expects a code block. If you
> press Enter, you get three dots again, and again, and again... You
> can't get out of the code block with pressing the Enter key; you have
> to press Ctrl+Z (if you're in Linux) in order to get out of that code
> block, which then throws you back to the Linux command line, but
> before that it prints this line
>
> [1]+  Stopped                 python
>
>
> If you do
>
> print "Testing\"   or   print 'Testing\'
>
> you get an error, but not of you use the triple quotes. Is that a bug
> in the interpreter perhaps?
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bluepikes at gmail.com  Thu May  8 09:21:17 2008
From: bluepikes at gmail.com (Blue Pikes)
Date: Thu, 8 May 2008 06:21:17 -0700 (PDT)
Subject: Re-launch of The Gadgets Forum
Message-ID: <fda02090-71b9-42dd-8a83-8e783d39910b@i76g2000hsf.googlegroups.com>

Re-launch of The Gadgets Forum
------------------------------------------------

Re-launch of "The Gadgets Forum - gadgets.pk" with new and stunning
categories, now you can find latest news and reviews about the
following:

1) Audio/Video Gadgets = MP3 Players, iPods, Speakers, Audio/Video
Systems, Digital Cameras etc.

2) Automobile Gadgets

3) Cell Phones & Accessories

4) Laptops, Desktops & Accessories

5) Clocks & Watches

6) Gaming Gadgets

7) Geek Toys

8) GPS & Satellites

9) Home & Office Gadgets

10) Kitchen Gadgets

11) Solar Powered Gadgets

12) Travel & Power Gadgets


JOIN NOW  http://www.gadgets.pk



From alex.m.gusarov at gmail.com  Tue May 27 05:16:51 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 02:16:51 -0700 (PDT)
Subject: Overloading virtual method of widget without inheriting (PyQt)
References: <6a53c9ff-d4ce-483e-959f-2505ad107093@a1g2000hsb.googlegroups.com>
	<slrng3nj3s.2i9.hat@se-162.se.wtb.tue.nl>
Message-ID: <1997713b-6fc0-497b-ae66-e90626b6645a@m73g2000hsh.googlegroups.com>

>    class MyPaintCell(PaintCell):
>       def paintcell(self):
>           PaintCell.paintcell(self)
>           myPaintCell(self)
>
>    (hmm, only 4 lines, I overestimated the cost. Sorry)

Yeah, that's funny..

I don't want to do it 'cause I create my form within Designer and
simply drop Calendar widget to it. Then I need to translate it
into .py file, it's OK. But if I want to use a custom derived from
Calendar class instead of it, I need after every refreshing/
translating of form replace few lines in translated file.

I just want to know about existence of other method to do this in
class, that contain instance of Calendar.

By "this" I mean:
Instead of calling original method "paintcell" alone, call it with my
custom metod.

Anyway, thanks.


From info at thegrantinstitute.com  Fri May 16 15:33:19 2008
From: info at thegrantinstitute.com (Anthony Jones)
Date: 16 May 2008 12:33:19 -0700
Subject: Professional Grant Proposal Writing Workshop (August 2008: Boston,
	Massachusetts - University of Phoenix Campus)
Message-ID: <20080516123319.7C0372E8BB9F6650@thegrantinstitute.com>

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From hdante at gmail.com  Mon May 19 21:15:01 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 18:15:01 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<21d1d960-110c-4d70-99f5-7ce47c184544@k13g2000hse.googlegroups.com>
Message-ID: <e2e0df30-26d4-41da-94b9-e137e86387d9@d77g2000hsb.googlegroups.com>

On May 19, 5:35?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > ?The situation would be simpler if there were good well-known toolkits
> > for optimization in python (like numpy for matrix operations), but
> > that's not the case.
>
> There's at least Psyco (if you're willing and able to restrict
> yourself from using some of the most dynamic parts of Python - which
> might not be a problem here). ?One could also mention stuff like Pyrex
> and Cython.

 I meant toolkits for "optimization problems", not "code
optimization".


From hat at se-162.se.wtb.tue.nl  Wed May  7 09:25:27 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 07 May 2008 15:25:27 +0200
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23>
	<3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com>
Message-ID: <slrng23be7.rpn.hat@se-162.se.wtb.tue.nl>

On 2008-05-07, Chris <cwitts at gmail.com> wrote:
>>>> os.chdir('C:\temp\my test')
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
> WindowsError: [Error 123] The filename, directory name, or volume
> label syntax is incorrect: 'C:\temp\\my test'

Python strings have \ escapes, such as \t, \n etc. Above you try to go to

C:<TAB>emp\my test

and you are lucky that \m is not something special.


Either escape your back slashes ("C:\\temp\\my test") or use raw strings
(r"C:\temp\my test").

Sincerely,
Albert


From castironpi at gmail.com  Wed May  7 09:49:36 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 06:49:36 -0700 (PDT)
Subject: Why don't generators execute until first yield?
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1> 
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1> 
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
	<Xns9A97897C78229duncanbooth@127.0.0.1> 
	<tohUj.34582$o06.12139@tornado.fastwebnet.it>
Message-ID: <051da660-6b78-410a-9cbf-b8d616384ce0@a70g2000hsh.googlegroups.com>

On May 7, 7:37?am, Marco Mariani <ma... at sferacarta.com> wrote:
> Duncan Booth wrote:
> > Perhaps if you'd copied all of my code (including the decorator that was
> > the whole point of it)...
>
> Sure, I missed the point. Python's > symbols become quoting levels and
> mess up messages.
>
> Anyway, I would loathe to start execution of a generator before starting
> to iterate through it. Especially when generators are passed around.
> The current behavior makes perfect sense.

Question:

>>> def f( ):
...     print 0
...     while 1:
...             yield 1
...
>>> g= f( )
>>> g.next( )
0
1
>>> g.next( )
1
>>> g.next( )
1

This might fit the bill:

>>> def dropfirst( h ):
...     h.next( )
...     return h
...
>>> g= dropfirst( f( ) )
0
>>> g.next( )
1
>>> g.next( )
1
>>> g.next( )
1

However as dropfirst is dropping a value, both caller -and- cally have
to designate a/the exception.  Hold generators are better "first-
dropped", and you hold 'next' inherently causes side effects.  @greedy
(from earlier) frees the caller of a responsibility/obligation.

What can follow without a lead?

The definitions may lean harder on the 'generation' as prior to the
'next': generators inherently don't cause side effects.

Or hold, first-dropped is no exception:

>>> special= object( )
>>> def f( ):
...     print 0
...     yield special
...     while 1:
...             yield 1
...
>>> g= f( )
>>> g.next( )
0
<object object at 0x00980470>
>>> g.next( )
1
>>> g.next( )
1
>>> g.next( )
1


From dullrich at sprynet.com  Mon May 19 13:51:12 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Mon, 19 May 2008 12:51:12 -0500
Subject: python script to windows exe
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
	<4541e631-d38a-4047-b578-bd9afdde0af8@s50g2000hsb.googlegroups.com>
	<9951d859-330f-4a7a-a869-df73cdce5f67@m44g2000hsc.googlegroups.com>
Message-ID: <1ff3349csta3dvmoau6meadkrrt239ujfv@4ax.com>

On Mon, 19 May 2008 02:59:22 -0700 (PDT), sandeep
<shiningsandy at gmail.com> wrote:

>
>hi
>the py code that i have written is here.when i run this code i wont
>get any errors it just works fine for me.but when i created the exe i
>start getting an error in my 'getMailContent' function. The error
>description is
>
>TypeError:unsupported operand type(s) for :- 'instance' and 'int'

Are you and py2exe using the same version of Python?
(Make something in the exe that displays sys.version...)

>i dont know why i am start getting this error when i run it through
>the exe.
>
>
>import win32com,win32com.client
>import os,os.path
>import codecs
>import zipfile
>
>#@Author:::Sandeep Kumar Sharma
>
>#outlook application refrence
>outlook_app=0
>#outlook ids to access different folders look into msdn for more info.
>not a preffered way as i am hardcoding data here
>OlDefaultFolders={'olFolderCalendar':9,'olFolderConflicts':
>19,'olFolderContacts':10,'olFolderDeletedItems':3,'olFolderDrafts':
>16,'olFolderInbox':6,'olFolderJournal':11,'olFolderJunk':
>23,'olFolderLocalFailures':21,'olFolderNotes':12,'olFolderOutbox':
>4,'olFolderSentMail':5,'olFolderServerFailures':
>22,'olFolderSyncIssues':20,'olFolderTasks':
>13,'olPublicFoldersAllPublicFolders':18}
>#outlook types to save mailItem look into msdn for more info
>#although doesnot work for me :-(
>OlSaveAsType={'olTXT': 0,'olRTF':1,'olTemplate': 2,'olMSG': 3,'olDoc':
>4,'olHTML':5,'olVCard': 6,'olVCal':7,'olICal': 8};
>
>#refrence to content in inbox
>inbox_obj=0
>
>#function which will initialise outlook and return its reference
>def getAppRef():
>    temp=win32com.client.Dispatch("OutLook.Application")
>    return temp.GetNamespace("MAPI")
>
>#function to return the folders in the outlook
>def getOutLookFolders(a,b=OlDefaultFolders['olFolderInbox']):
>    return a.GetDefaultFolder(b)
>
>#function to get email content
>def getMailContent(obj):
>    txt_file=codecs.open('data.html',encoding='utf-8',mode='w')
>    for kk in range(len(obj.Items),1,-1):
>    #for kk in range(len(obj.Items-1),0,-1):
>        #print 'hello'
>        print 'writting file='+str(kk)
>        mailItem=obj.Items[kk]
>        writeData(mailItem,txt_file)
>
>        #print mailItem.OlSaveAsType.olMSG
>        #saveCopy(mailItem)
>        #print "sender="+mailItem.SenderName+'
>SenderEmailId='+str(mailItem.SenderEmailAddress)+'
>Time='+str(mailItem.ReceivedTime)
>        #print 'Subject='+mailItem.Subject+' size='+str(mailItem.Size)
>
>    txt_file.close()
>    '''
>    file_zip=zipfile.ZipFile(txt_file,"w",zipfile.ZIP_DEFLATED)
>    file_zip.write('data.log')
>    file_zip.close()
>    '''
>
>#function to create a directory
>#obviously not a best way :-( but i think can expected this sort of
>mistakes from beginners
>def createDir():
>    path=os.path.abspath("\email")
>    if(os.path.exists(path)):
>        print "Directory already exists"
>    else:
>        os.system("md "+path)
>
>#function to save a copy of email
>def writeData(mailItem,file):
>    data="<p>"
>    sender='<h4>SenderName</
>h4>'+checkStringType(mailItem.SenderName)
>    time='<br><h4>Time</
>h4>'+checkStringType(str(mailItem.ReceivedTime))
>    attachment='<br><h5>Attachments Count</
>h5>'+str(len(mailItem.Attachments))
>    edata='<h4>Email Content</h4>'+checkStringType(mailItem.Body)+"</
>p><hr/>"
>    dataToWrite=data+sender+time+attachment+edata
>    getAttachmentInfo(mailItem.Attachments)
>    file.write(getHTMLString(dataToWrite))
>    #checkStringType(dataToWrite)
>
>def getAttachmentInfo(atmts):
>    for kk in range(1,len(atmts)):
>        atmt=atmts[kk]
>        #print "File Name="+atmt.FileName+'
>DisplayName='+atmt.DisplayName+' PathName='+atmt.PathName+' '
>        abc=os.path.isdir(os.getcwd()+'\email')
>
>        if(abc==True):
>            print 'directory exists'
>
>        else:
>            os.mkdir(os.getcwd()+'\email')
>
>        path=os.path.abspath(os.getcwd()+'\email')
>        atmt.SaveAsFile(path+"\\"+atmt.DisplayName)
>
>
>
># function to check whether the character encoding is ascii or smthing
>else
>def checkStringType(a):
>
>    if isinstance(a,str):
>       b='not a unicode string'
>
>    else:
>        a.encode('utf-8')
>        #print 'unicode type'
>
>    return a
>
>#function to save the coopy of an email
>#:-( but smhow it generate error whenever i make a call to it
>def saveCopy(mailItem):
>
>    name="\\"+mailItem.Subject+"__"+str(mailItem.ReceivedTime)
>    print name
>    #global outlook_app
>    try:
>        mailItem.SaveAs(path+name+".txt",OlSaveAsType['olTXT'])
>    except BaseException:
>        print BaseException
>
>def getHTMLString(b):
>    a='<html><head><title>Your Email Data log is here</title></
>head><body>'+b+'</body></html>'
>    return a
>
>#main entrance to the program
>def main():
>    global outlook_app,inbox_obj
>    outlook_app=getAppRef()
>    #print outlook_app.OlSaveAsType.olMSG
>    print '=================='
>    print dir(outlook_app)
>    print '=================='
>    inbox_obj=getOutLookFolders(outlook_app)
>    print dir(inbox_obj)
>    print (inbox_obj.Items)
>    #saveCopy(inbox_obj.Items[1])
>    getMailContent(inbox_obj)
>
>
>
>main()
>
>
>my setup file has this code
>
>from distutils.core import setup
>import py2exe
>
>setup(console=['outlook.py'])
>
>
>i have just copied and pasted it from the tutorial available at the
>py2exe site and changed the filename with mine filename.
>
>
>thanks and regards
>sandeep kumar sharma
>
>> There is nothing special in executables produced by py2exe. I mean
>> that the debugging strategy is as always. A good start might be in
>> adding logging\tracing facilities both to script and the executable.
>> Comparing two trace files could give you some clue.

David C. Ullrich


From parimala.kalavala at gmail.com  Mon May 26 05:57:38 2008
From: parimala.kalavala at gmail.com (PARIMALA KALAVALA)
Date: Mon, 26 May 2008 15:27:38 +0530
Subject: how to access run queue
Message-ID: <67eb1c790805260257y6a645267m9a4af055269ab101@mail.gmail.com>

Hello,

      I wanted to know how how to access the run queue or active queue from
userspace and how to check whether one process is preempting another process
in linux.

Thanks,

With regards
Parimala
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From tjreedy at udel.edu  Sat May 24 21:38:14 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 21:38:14 -0400
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org><roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net><mailman.1532.1211644302.12834.python-list@python.org><g19fv3$3vl$1@gide.ita.chalmers.se><18c1e6480805241214t6c556e46r31170ea50d0eb1d5@mail.gmail.com>
	<20080524164608.5a803201.darcy@druid.net>
Message-ID: <g1afu4$6tq$1@ger.gmane.org>


"D'Arcy J.M. Cain" <darcy at druid.net> wrote in message 
news:20080524164608.5a803201.darcy at druid.net...
| > But once you track down problems like the above you can write more
| > unit tests to catch those exact bugs in the future. This is one case
| > where I do favour unit tests.
|
| Yes!  One of the biggest advantages to unit testing is that you never
| ever deliver the same bug to the client twice.  Delivering software
| with a bug is bad but delivering it with the same bug after it was
| reported and fixed is calamitous.

Writing a test for each code bug is now part of the Python maintenance 
procedure. 





From ivan.illarionov at gmail.com  Sun May 25 08:14:55 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Sun, 25 May 2008 12:14:55 +0000 (UTC)
Subject: Getting a set of lambda functions
References: <g1bjcj$u3m$1@aioe.org>
Message-ID: <g1bl7v$1id3$1@news.mtu.ru>

On Sun, 25 May 2008 13:43:15 +0200, Martin Manns wrote:

> Hi,
> 
> I try to get a set of lambda functions that allows me executing each
> function code exactly once. Therefore, I would like to modify the set
> function to compare the func_code properties (or the lambda functions to
> use this property for comparison).
> 
> (The reason is that the real function list is quite large (> 1E5), there
> are only few functions with non-equal code and the order of execution is
> not important.)
> 
> How can I achieve this?
> 
>>>> func_strings=['x', 'x+1', 'x+2', 'x'] funclist = [eval('lambda x:' +
>>>> func) for func in func_strings] len(funclist)
> 4
>>>> len(set(funclist))
> 4
>>>> funclist[0].func_code == funclist[3].func_code
> True
>>>> funclist[0] == funclist[3]
> False
> 
> 
> Thanks in advance
> 
> Martin

Maybe make a set of code objects?

func_code_set = set([f.func_code for f in funclist])

funclist = []
for fc in func_code_set:
    f = lambda x: x
    f.func_code = fc
    funclist.append(f)

-- Ivan


From p5secr2 at uni-jena.de  Mon May 19 10:45:51 2008
From: p5secr2 at uni-jena.de (cseja)
Date: Mon, 19 May 2008 16:45:51 +0200
Subject: scope of optional arguments
References: <g0s2v3$fa6$01$1@news.t-online.com>
	<mailman.1347.1211207922.12834.python-list@python.org>
Message-ID: <g0s3r6$eli$02$1@news.t-online.com>

Thank you very much for your fast and usefull response, Steven. Have a nice 
day. 




From hdante at gmail.com  Tue May  6 16:27:13 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 13:27:13 -0700 (PDT)
Subject: ]ANN[ Vellum 0.16: Lots Of Documentation and Watching
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
Message-ID: <232ee177-a5c9-488f-921e-cd6ecb5ff3ed@b1g2000hsg.googlegroups.com>

On May 5, 3:26?pm, vivai... at gmail.com (Ville M. Vainio) wrote:
> "Zed A. Shaw" <zeds... at zedshaw.com> writes:
>
> > GPLv3?
>
> > How do people feel about Vellum's GPLv3 status? ?It actually doesn't
> > impact anyone unless you embed Vellum into a project/product or you
>
> Yeah, but it effectively prevents people from embedding it into their
> apps that wish to remain BSD/MIT clean.

 That's not a good argument. "GPL has the problem that if people don't
want to use GPL, then they can't use the GPL'd code."

 GPL can mix with other free software licenses, so people who write
BSD code and do not wish to remain BSD clean are free to use GPL'd
code. That's the important point.

>
> It's not likely that some evil corporation is going to hijack Vellum
> source code as a basis of their next evil app (which is basically what
> GPL is used to prevent) any time soon, so I don't really see a
> particular reason for such a developer-oriented tool to be released
> under GPL.

 Viral licenses only serve that purpose ("protecting from evil
corporations"). If he licensed Vellum with GPL in the first place,
he's worried about that.

>
> Basically, avoiding GPL maximizes the brainshare that a small-ish tool

 True, but you may never ever see the brilliant result of that
brainshare work. Thus, for the author, your sentence is false.

> is going to attract, and many (including myself, FWIW) view GPL as a

 How many ?

> big turn-off when I consider spending some time to familiarize myself
> with a tool, or recommending it to someone else.


From usenet at solar-empire.de  Sun May 18 15:17:43 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Sun, 18 May 2008 21:17:43 +0200
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
Message-ID: <nvb6g5-7qn.ln1@pluto.solar-empire.de>

Matt Porter <mabbikeel at gmail.com> wrote:
> Hi guys,
> 
> I'm trying to compress a string.
> E.g:
>  "AAAABBBC" -> "ABC"

You mean like this?

 >>> ''.join(c for c, _ in itertools.groupby("AAAABBBCAADCASS"))
 'ABCADCAS'

HTH
  Marc


From castironpi at gmail.com  Mon May  5 19:40:50 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 16:40:50 -0700 (PDT)
Subject: STL multimap
References: <dfee4d07-ff76-4e5e-9da6-df7001f08089@a23g2000hsc.googlegroups.com>
	<43029641-3df0-45ac-8e22-9684f7354d80@k37g2000hsf.googlegroups.com>
Message-ID: <ebafc2db-0f80-456d-92c5-2adc5a1805b6@m73g2000hsh.googlegroups.com>

On May 5, 1:26?pm, Aaron Watters <aaron.watt... at gmail.com> wrote:
> Hi there. ?Maybe a little more context would
> help us figure out what you want here...
>
> On May 5, 1:28 pm, castiro... at gmail.com wrote:
>
> > Is multimap just a syntax-checked dictionary of mutable sequences?
>
> I think the equivalent of a multimap can be
> implemented several different ways, depending on
> what you need:
>
> ? for
> ? ? ? ?1 maps to 2,3
> ? ? ? ?5 maps to 7
> ? - dictionary mapping to lists
> ? ? ? ?{ 1:[2,3], 5:[7] } # supports unhashable values
> ? - dictionary mapping to dictionary
> ? ? ? ?{ 1:{2:None,3:None}, 4:{7:None} } # faster for certain lookups
> and dense data
> ? - dictionary with tuple/pairs as keys
> ? ? ? ?{ (1,2):None, (1,3):None, (4,7):None } # streamlined for
> existence testing

It's possible there are four different kinds of multimaps.

objects map to set
objects map to frozenset
objects map to sequence
frozenset maps to object

What does the STL use?  I am interested in a serialization that
changes certain bits and appends more.  Prior discussion brought me to
multimap, but that quotient stifled it.

> If you search usenet (google groups) for multimap
> you will find some nice discussions by Alex Martelli and others.
>
> > Is def( a ): a[:]= [x] a trick or part of the language? ?It looks
> > pretty sharp in variable-width.
>
> You lost me here.

I was referring to a couple of threads from the Winter [cit. off'd.]
that never really gelled.

Modifying parameters is crucial to a number of control flow structures
(program divisions).  Examples could come handy.

>>> def a( x ): x[:]= [x[0]+ 1]
...
>>> b= [2]
>>> a(b)
>>> b
[3]

I'm not sure if doing so is operating strictly by side-effect, or what
the term is.  I forget from theory class if all the same terminology
holds post hoc* to introduction of Memory structures, either hard or
soft as modeled in formal functional-expressional language systems.  I
noticed the idiom x[:]= [y].  Does it mean the right thing?  At higher
levels of complexity, it scans as an unnamed struct.  (Warning,
interacts with logical development.)  What is the meaning of slice
assigment, if not?

*post/poster [...after]. This use originates in the Latin phrase,
'post hoc ergo propter hoc'.

> python 2.6:>>> def (a): a[:]=[x]
>
> ? File "<stdin>", line 1
> ? ? def (a): a[:]=[x]
> ? ? ? ? ^
> SyntaxError: invalid syntax
>
> All the best. ?-- Aaron Watters
>
> ===http://www.xfeedme.com/nucular/pydistro.py/go?FREETEXT=gaping+securit...




From alex.gaynor at gmail.com  Tue May 13 20:41:24 2008
From: alex.gaynor at gmail.com (alex.gaynor at gmail.com)
Date: Tue, 13 May 2008 17:41:24 -0700 (PDT)
Subject: Install Python MySQL db module?
References: <aa75c244-1b19-4ec9-82fa-311249a684d6@z16g2000prn.googlegroups.com>
Message-ID: <b136c669-8326-4900-87c4-6f86f7ea189c@e39g2000hsf.googlegroups.com>

On May 13, 7:29?pm, Con <conra... at gmail.com> wrote:
> Hi, how does properly install the Python MySQL db module for Mac OS
> X? ?I was only able to locate the Win32 modules.
>
> Thanks in advance,
>
> -Conrad

I think the easiest way to would be to use macports.


From barry at python.org  Thu May  8 19:50:06 2008
From: barry at python.org (Barry Warsaw)
Date: Thu, 8 May 2008 19:50:06 -0400
Subject: RELEASED Python 2.6a3 and 3.0a5
Message-ID: <88DFD025-8670-42FA-9B73-AFF5193FB0AE@python.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On behalf of the Python development team and the Python community, I  
am happy to announce the third alpha release of Python 2.6, and the  
fifth alpha release of Python 3.0.

Please note that these are alpha releases, and as such are not  
suitable for production environments.  We continue to strive for a  
high degree of quality, but there are still some known problems and  
the feature sets have not been finalized.  These alphas are being  
released to solicit feedback and hopefully discover bugs, as well as  
allowing you to determine how changes in 2.6 and 3.0 might impact
you.  If you find things broken or incorrect, please submit a bug  
report at

    http://bugs.python.org

For more information and downloadable distributions, see the Python
2.6 website:

    http://www.python.org/download/releases/2.6/

and the Python 3.0 web site:

    http://www.python.org/download/releases/3.0/

These are the last planned alphas for both versions.  If all goes  
well, next month will see the first beta releases of both, which will  
also signal feature freeze.  Two beta releases are planned, with the  
final releases scheduled for September 3, 2008.

See PEP 361 for release details:

     http://www.python.org/dev/peps/pep-0361/

Enjoy,
- -Barry

Barry Warsaw
barry at python.org
Python 2.6/3.0 Release Manager
(on behalf of the entire python-dev team)

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.8 (Darwin)

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DBgd/5IK8moITkqhqGAH5UvfytV6uPkOMgGIS/Uvk4hzhU3jwSopEIDJLFQ5nGtC
lCzOHzkDjSNZ8Q2OOAI9mbSHY8grvVxCMB4X2SVXIEMZ6M/X1AcV2b0utp9O1w/l
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=2Tnb
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From stef.mientki at gmail.com  Thu May  1 06:10:45 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Thu, 01 May 2008 12:10:45 +0200
Subject: __getattr__ and recursion ?
In-Reply-To: <fv9gpf$e4a$02$1@news.t-online.com>
References: <mailman.343.1209498035.12834.python-list@python.org>
	<fv9gpf$e4a$02$1@news.t-online.com>
Message-ID: <48199725.8020209@gmail.com>

thanks Peter,

for your perfect explanation, and
> By the way, looping over a dictionary destroys its key advantage, O(1)
> lookup. Use
>
> # untested
> if attr in self.extra_setters:
>     self.extra_setters[attr](value)
> else:
>     self.__dict__[attr] = value
>
> and something similar in __getattr__().
>
>   
yes, that's probably much better, have to get used to this Python behavior,
thanks,

cheers,
Stef



From upton at virginia.edu  Mon May  5 10:16:48 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 5 May 2008 10:16:48 -0400
Subject: pygame music, cant read mp3?
In-Reply-To: <0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
Message-ID: <5504f9ac0805050716r670c01f1u92c7dfeae39abedf@mail.gmail.com>

On Mon, May 5, 2008 at 10:09 AM, globalrev <skanemupp at yahoo.se> wrote:
> On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
>  wrote:
>  > 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> >
>  > > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>  >
>
> > Are you sure that:
>  >
>  > os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>  >
>  > Check it with python.
>  >
>  > --
>  > Regards,
>  > Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/
>
>
>  >>> import os
>  >>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
>  False
>
>
>  but...it is there....
>
>  >>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
>  False

What about:

os.path.exists('C:\\Python25\\myPrograms\\pygameProgs\\dront.mp3') == True

That's what Diez mentioned earlier in the thread about escaping the slashes.
>
>  does it matter if i use / or \? which si recommended?


Which slash to use basically depends on whether you're on Windows
(uses \ as a path separator) or *nix (uses / as a path separator).


From sturlamolden at yahoo.no  Sun May 18 15:50:30 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Sun, 18 May 2008 12:50:30 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<i3e034l3n6bvt8g0lbk8bvekatqu49r69c@4ax.com>
Message-ID: <a46eaca4-934d-4294-9fa9-ee9ee108ff4f@m73g2000hsh.googlegroups.com>

On May 18, 4:20 pm, David C. Ullrich <dullr... at sprynet.com> wrote:

> Are you going to be doing research _about_ the
> algorithms in question or is it going to be research
> _using_ these algorithms to draw conclusions
> about other things?
>
> Most of the replies seem to be assuming the latter.
> If it's the former then Python seems like definitely
> an excellent choice - when you have want to try
> something new it will be much faster trying it
> out in Python,

I second this. Hence my previous statement that "In scientific
research, CPU time is cheap and time spent programming is expensive."
If it was not clear what I meant, your post can serve as a
clarification. But whether Giner is 'developing' or 'using'
algorithms, he should value his own labour more than the CPU's. CPU
labour (i.e. computation) is very cheap. Manual labour (i.e.
programming) is very expensive. He may in any case benefit from using
Python. Today, the preferred computer language amount scientists is
not Fortran77, but various high-level languages like Matlab, S, IDL,
Perl and Python.

A related question is: How much 'speed' is really needed? If Giner is
analyzing datasets using conventional statistics (ANOVA, multiple
regression, etc.), when will Python (with NumPy) cease to be
sufficient? In my experience, conventional statistics on a dataset of
100,000 or 1,000,000 samples can be regarded child's play on a modern
desktop computer. One really need HUGE amounts of data before it's
worthwhile to use anything else. If one can save a couple of seconds
CPU time by spending several hours programming, then the effort is not
just futile, it's downright wasteful and silly.


Something else that should be mentioned:

The complexity of the algorithm (the big-O notation) is much more
important for runtime performance than the choice of language. If you
can replace a O(N*N) with O(N log N), O(N) or O(1) it is always
adviceable to do so. An O(N*N) algorithm implemented in C is never
preferred over an O(N) algorithm written in Python. The only time when
C is preferred over Python is when N is large, but this is also when
O(N*N) is most painful. Pay attention to the algorithm is things are
running unbearably slow.

Python has highly tuned datatypes like lists, dicts and sets, which a
C programmer will have a hard time duplicating. This also applies to
built-in algorithms like 'timsort'. qsort in the C standard library or
anything a C programmer can whip up within a reasonable amount of time
simply doesn't compare. C vs. Python benchmarks that doesn't take this
into account will falsely put Python in a bad light.













From martin at v.loewis.de  Sun May 11 02:50:27 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 11 May 2008 08:50:27 +0200
Subject: Compiling Python 2.5.2 on AIX 5.2
In-Reply-To: <9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>
References: <0b73e8e5-c301-4823-ac94-42f757456cf1@x19g2000prg.googlegroups.com>
	<mailman.402.1208181700.17997.python-list@python.org>
	<d72454cc-256d-4e24-ae2b-b87dd77c9e0d@c19g2000prf.googlegroups.com>
	<48059DA9.5080900@v.loewis.de>
	<c55ebac2-093c-4639-8fd4-c54df2ecf480@k1g2000prb.googlegroups.com>
	<480c2364$0$26788$9b622d9e@news.freenet.de>
	<e05d2418-89b5-4864-a46b-e27341ec84d9@26g2000hsk.googlegroups.com>
	<480e2bbc$0$24477$9b622d9e@news.freenet.de>
	<9140d58c-9034-4a67-9d93-9a0b09089898@s33g2000pri.googlegroups.com>
Message-ID: <48269733.4000305@v.loewis.de>

>   Opening mmap with access=ACCESS_COPY
>   Modifying copy-on-write memory map.
> Traceback (most recent call last):
>   File "Lib/test/test_mmap.py", line 393, in <module>
>     test_both()
>   File "Lib/test/test_mmap.py", line 247, in test_both
>     m.flush()
> EnvironmentError: [Errno 22] Invalid argument

I see. This is

http://bugs.python.org/issue678250

Regards,
Martin


From bborcic at gmail.com  Thu May  8 08:43:47 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 08 May 2008 14:43:47 +0200
Subject: slicing lists
In-Reply-To: <xxuUj.250118$pM4.15725@pd7urf1no>
References: <rXqUj.120085$rd2.64592@pd7urf3no>
	<fvtf0p$6pj$1@news.mtu.ru>	<mailman.731.1210209219.12834.python-list@python.org>
	<xxuUj.250118$pM4.15725@pd7urf1no>
Message-ID: <fvusjn$nne$1@ger.gmane.org>

Yves Dorfsman wrote:
> 
> So would it be a worthy addition to python, to add it right in the core 
> of the language, and hopefully in an efficient manner ?
> 

Note that the s[0,2:6] syntax is currently allowed because of the distinct 
semantics that the Numeric module and its successors numarray and numpy had for it.



From marco at sferacarta.com  Mon May 12 03:54:56 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Mon, 12 May 2008 09:54:56 +0200
Subject: source beautifier
In-Reply-To: <48242959.3030405@behnel.de>
References: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>
	<48242959.3030405@behnel.de>
Message-ID: <lJSVj.40228$o06.28055@tornado.fastwebnet.it>

Stefan Behnel wrote:

>> http://www.polystyle.com/features/python-beautifier.jsp
>>
>> I've never used it, but the example is quite clear.
> 
> I tend to believe that running these tools on some average Python code would
> not even change whitespace. ;)

I bet it's idempotent against _your_ code, but not in the context of 
python beginners or people who just made up their mind about what coding 
style to use.


From ptmcg at austin.rr.com  Wed May 21 12:15:04 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 21 May 2008 09:15:04 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
Message-ID: <085a3a40-5e58-4523-8815-092a9a52a258@k30g2000hse.googlegroups.com>

On May 21, 10:59?am, Damon Getsman <dgets... at amirehab.net> wrote:
> I'm having an issue parsing lines of 'last' output that I have stored
> in a /tmp file. ?The first time it does a .readline() I get the full
> line of output, which I'm then able to split() and work with the
> individual fields of without any problem. ?Unfortunately, the second
> time that I do a .readline() on the file, I am only receiving the
> first character of the first field. ?Looking through the /tmp file
> shows that it's not corrupted from the format that it should be in at
> all... ?Here's the relevant script:
>
> ----
> ? ? #parse
> ? ? Lastdump = open('/tmp/esd_tmp', 'r')
>
> ? ? #find out what the last day entry is in the wtmp
> ? ? cur_rec = Lastdump.readline()
> ? ? work = cur_rec.split()
>
> ? ? if debug == 1:
> ? ? ? ? print work
> ? ? ? ? print " is our split record line from /tmp/esd_tmp\n"
>
> ? ? startday = work[3]
>
> ? ? if debug == 1:
> ? ? ? ? print startday + " is the starting day\n"
> ? ? ? ? print days
> ? ? ? ? print " is our dictionary of days\n"
> ? ? ? ? print days[startday] + " is our ending day\n"
>
> ? ? for cur_rec in Lastdump.readline():
> ? ? ? ? work = cur_rec.split()
>
<snip>


    for cur_rec in Lastdump.readline():

is the problem.  readline() returns a string containing the next
line's worth of text, NOT an iterator over all the subsequent lines in
the file.  So your code is really saying:

    next_line_in_file = Lastdump.readline():
    for cur_rec in next_line_in_file:

which of course, is iterating over a string character by character.

Since you are opening Lastdump (not great casing for a variable name,
BTW - looks like a class name with that leading capital letter), it
gives you an iterator already.  Try this instead:

lastdump = open('/tmp/esd_tmp', 'r')

cur_rec = lastdump.next()

...

    for cur_rec in lastdump:

...

This should get you over the hump on reading the file.

Also, may I suggest this method for splitting up each record line, and
assigning individual fields to variables:

    user,s1,s2,day,month,date,time,desc = cur_rec.split(None,7)

-- Paul



From phil at riverbankcomputing.com  Wed May 21 18:50:49 2008
From: phil at riverbankcomputing.com (Phil Thompson)
Date: Wed, 21 May 2008 23:50:49 +0100
Subject: ANN: PyQt v4.4.2 Released
Message-ID: <200805212350.49250.phil@riverbankcomputing.com>

Riverbank Computing is pleased to announce the release of PyQt v4.4.2 
available from http://www.riverbankcomputing.com/software/pyqt/.

This release adds full support for Qt v4.4.0 including the new QtHelp, 
QtWebKit, QtXmlPatterns and phonon modules.

A Windows installer is provided for the GPL version of PyQt which contains 
everything needed for PyQt development (including Qt, Qt Designer and 
QScintilla) except Python itself.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt (Windows, Linux and MacOS/X).  Like Qt, 
PyQt is available under the GPL and a commercial license.

PyQt v4 supports Qt v4 (http://www.trolltech.com/products/qt/index.html).  
PyQt v3 is still available to support earlier versions of Qt.

PyQt v4 is implemented as a set of 17 extension modules containing over 400 
classes and over 6,000 functions and methods.

    QtCore
    The non-GUI infrastructure including event loops, threads, i18n, Unicode,
    signals and slots, user and application settings, mapped files and shared
    memory.

    QtDesigner
    A set of classes that allow the Qt Designer GUI design tool to be extended
    with PyQt.

    QtGui
    A rich collection of GUI widgets.

    QtHelp
    A set of classes for creating and viewing searchable documentation and
    being able to integrate online help with PyQt applications.  It includes
    the C++ port of the Lucene text search engine.

    QtNetwork
    A set of classes to support TCP and UDP socket programming and higher
    level protocols (eg. HTTP, SSL).

    QtOpenGL
    A set of classes that allows PyOpenGL to render onto Qt widgets.

    QtScript
    A set of classes that implements a JavaScript interpreter.  Python objects
    may be exposed in the interpreter as JavaScript objects.

    QtSql
    A set of classes that implement SQL data models and interfaces to industry
    standard databases.  It includes an implementation of SQLite.

    QtSvg
    A set of classes to render SVG files onto Qt widgets.

    QtTest
    A set of classes to automate unit testing of PyQt applications and GUIs.

    QtWebKit
    This implements a web browser engine based on the WebKit engine used by
    Apple's Safari browser.  It allows the methods and properties of Python
    objects to be published and appear as JavaScript objects to scripts
    embedded in HTML pages.

    QtXML
    A set of classes that implement DOM and SAX parsers.

    QtXMLPatterns
    A set of classes that implement XQuery and XPath support for XML and
    custom data models.

    QtAssistant
    A set of classes that enables the Qt Assistant online help browser to be
    integrated with an application.

    QAxContainer
    A set of classes for Windows that allows the integration of ActiveX
    controls and COM objects.

    phonon
    A cross-platform multimedia framework that enables the use of audio and
    video content in PyQt applications.  DirectX is used as the Windows
    backend, QuickTime as the MacOS/X backend, and GStreamer as the Linux
    backend.

    DBus
    PyQt includes dbus.mainloop.qt that allows the Qt event loop to be used
    with the standard DBus Python bindings.

PyQt includes the pyuic4 utility which generates Python code to implement user
interfaces created with Qt Designer in the same way that the uic utility
generates C++ code.  It is also able to load Designer XML files dynamically.

Phil


From pavlovevidence at gmail.com  Wed May 14 17:47:12 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 14 May 2008 14:47:12 -0700 (PDT)
Subject: Class Methods Vs Any Other Callable
References: <98b4a67c-9ec7-407c-8c80-06488bd48a68@e39g2000hsf.googlegroups.com>
	<690ap7F2u0ftdU1@mid.uni-berlin.de>
	<b808653b-fcf1-4932-9c81-7aa351599574@m44g2000hsc.googlegroups.com>
	<690ge0F2vj8fiU1@mid.uni-berlin.de>
	<0be4edce-1b3f-45bb-b186-de20f8bc9087@e53g2000hsa.googlegroups.com>
Message-ID: <062fd218-35d5-478e-b2cf-aef2e571a2fa@c65g2000hsa.googlegroups.com>

On May 14, 12:21 pm, vbgunz <vbg... at gmail.com> wrote:
> Other than the 2 reasons above (2 making more sense), what is a really
> good reason to pull out the class method. In other words, when you see
> one, what is the first thing that comes to mind? When you write one,
> what was the first thing on your mind? Other than "similar to static-
> methods", at what point will you be glad you used one? To sum it up,
> what is the best role for a class-method that does not turn your work
> into code-soup?


When classmethods are inherited, they are called with the class it was
invoked with, rather than the class they were defined in.  Try this
example:


class A(object):
    @classmethod
    def classname(cls):
        print cls.__name__

    @staticmethod
    def staticname():
        print "A"

class B(A):
    pass

B.staticname()
B.classname()


Carl Banks


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 04:21:30 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 10:21:30 +0200
Subject: Compress a string
In-Reply-To: <48307858$0$906$ba4acef3@news.orange.fr>
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<48307858$0$906$ba4acef3@news.orange.fr>
Message-ID: <48328a04$0$19210$426a74cc@news.free.fr>

Salvatore DI DI0 a ?crit :
(top-post corrected - Salvatore, please, don't top-post)
> "Matt Porter" <mabbikeel at gmail.com> a ?crit dans le message de news: 
> mailman.1315.1211133997.12834.python-list at python.org...
>> Hi guys,
>>
>> I'm trying to compress a string.
>> E.g:
>>  "AAAABBBC" -> "ABC"

 > Try this
 >
 > t = set("aaaaaaaaaaaabbbbbbbbbbccccccccc")
 > list(t)

Won't keep the ordering.




From rhamph at gmail.com  Sat May 10 12:02:11 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Sat, 10 May 2008 09:02:11 -0700 (PDT)
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
	<mailman.737.1210231391.12834.python-list@python.org>
	<48240921$0$7184$426a74cc@news.free.fr> 
	<mailman.883.1210362812.12834.python-list@python.org>
Message-ID: <254b1295-9a91-4bc2-9dba-7ec7af5c19e0@a9g2000prl.googlegroups.com>

On May 9, 1:53 pm, Daniel Marcel Eichler <onsen-n... at gmx.net> wrote:
> Am Freitag 09 Mai 2008 10:19:45 schrieb Bruno Desthuilliers:
>
> > >> very often sees do-nothing catch-all try/catch blocks in Java -
> > >> which is way worse than just letting the exception propagate. I
> > >> find all this totally pointless, because there's just no way for a
> > >> compiler to check if your code is logically correct.
>
> > > But it's enough if the called method exists and returns the correct
> > > type. At least it prevents a crash.

The application has already failed.  You'd prefer it silently do the
wrong thing than get an explicit error message and stop?


> > >>> That's the point. Interfaces garantee that a duck is a duck, an
> > >>> not only a chicken that quack.
>
> > >> Who cares if it's a chicken as long as it quacks when you ask her
> > >> to ? Now *This* is the whole point of chicken^Mduck typing, isn't
> > >> it ?-)
>
> > > Ducks can also swim and fly.  And if you need a really duck,
>
> > If you're code expects something that quacks, swims and flies,
> > anything that quacks, swims and flies is ok. You just don't care if
> > it's a duck or a flying whale with a quacking device tied to it.
>
> Not the point.

It really is.  They're only going to give you something they expect to
work.  They might occasionally make a mistake and give you garbage,
but it's not worth the effort of trying to catch it early.



From aguirre.adolfo at gmail.com  Tue May  6 18:54:08 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Tue, 6 May 2008 15:54:08 -0700 (PDT)
Subject: DISLIN 9.3 starting issues
Message-ID: <9f7035c5-38ad-4e46-85b4-4fb29d791ddb@m44g2000hsc.googlegroups.com>

*** I thought I posted this subject 45 min ago but it does not show so
something went wrong and it does not show up. Excuse me if I repeat
myself  ***

DISLIN 9.3 old manual problems

I just installed DISLIN 9.3 for python (DISPY is installed too)  and I
am up to:

1.4 Quickplots
Some quickplots are added to the DISLIN module which are collections
of DISLIN routines for displaying data with one command. For example,
the function ?plot? displays two-dimensional curves.

Example:
from Numeric import *
from dislin import *
x = arange (100, typecode=Float32)
plot (x, sin (x/5))
disfin ()


I built the following little program:

from numpy import *
from dislin import *

def main():
    x = arange (100, typecode=Float32)
    plot (x, sin (x/5))
    disfin ()

main()

*** Here are the problems:

1. The "from Numeric import" statement did not work, I replaced with
"from numpy import*" and no complains form the interpreter.

2. If I enyter "from dislin import *" I get:
 Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    from dislin import *
ImportError: No module named dislin
>>>

I checked the environmental variables paths and it all seems Ok:
c:\dislin
SYSTEM PATH = %SystemRoot%\system32;%SystemRoot%;\System32;\Wbem;C:
\Archivos de programa;\QuickTime;\QTSystem;C:\dislin\win
PYTHON PATH = C:\Archivos de programa\ArcGIS\bin;c:\dislin\python

WHAT ELSE TO DO?

any help will be much apreciated


From kw at codebykevin.com  Sat May 10 12:02:11 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 12:02:11 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.905.1210434531.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>	<mailman.902.1210433160.12834.python-list@python.org>	<4825C265.90106@codebykevin.com>
	<mailman.905.1210434531.12834.python-list@python.org>
Message-ID: <4825C703.8070206@codebykevin.com>

Guilherme Polo wrote:

> Thanks ;)
> And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

Excellent. I hope your effort is successful.
>
> Thanks for support it, and sorry for saying yours was incomplete.
> I wasn't trying to sell my version by doing that, was just trying to
> say there were some point on doing another wrapper. I also noticed
> that there is some problem in getting Martin Franklin to fill the
> contributors agreement, that was the second point on doing this
> wrapper.

No offense taken. Martin is pretty busy these days and doesn't have time 
to work on it further; frankly, I'm not sure I'd have time if a lot of 
changes were requested. So if your package proves to be the best, great! 
I'll switch over my own apps to it.

Good luck!

Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From deets at nospam.web.de  Wed May 28 17:52:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 23:52:08 +0200
Subject: Threads and import
In-Reply-To: <44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
	<6a5pulF36888qU1@mid.uni-berlin.de>
	<0d96c6da-d239-4b15-8456-70e2d9e67fa2@59g2000hsb.googlegroups.com>
	<6a5rfvF36c899U1@mid.uni-berlin.de>
	<b029eae6-e19a-47ea-967c-e2e3c4bedb2c@f36g2000hsa.googlegroups.com>
	<6a60t2F35v9uuU1@mid.uni-berlin.de>
	<44a645b5-d71f-46d4-af67-a9583b509f60@t54g2000hsg.googlegroups.com>
Message-ID: <6a62gcF364hvfU1@mid.uni-berlin.de>

> Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> import TestThread # from TestThread.py

If I use python 2.5, this doesn't happen - instead, the module ist just run.

If I use python 2.4, it doesn't work unless I do

export PYTHONPATH=.

before I use the -m-option.

But then it works as advertised...

Diez


From alex.m.gusarov at gmail.com  Tue May 27 07:48:38 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Tue, 27 May 2008 18:48:38 +0700
Subject: graphical ide??
In-Reply-To: <1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
References: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>
	<1d3e7b3c-1767-4c26-ba4c-cba86189f8c7@k30g2000hse.googlegroups.com>
Message-ID: <ac6dcb3d0805270448m643b13ardc15027fec979722@mail.gmail.com>

I tried Eric (on windows), but then decided in favour of Eclipse +
PyDev. It's really good combination and if you want to develop PyQt
apps, you can also install Qt Integration plugin to Eclipse, so you
will have all what you need for PyQt development, include form
designer and resource editor. PyQt + Eclipse Qt plugin distributed
under GPL.

--
Best regards, Alex Gusarov


From kyosohma at gmail.com  Fri May  9 10:06:32 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 9 May 2008 07:06:32 -0700 (PDT)
Subject: help needed!
References: <mailman.866.1210341290.12834.python-list@python.org>
Message-ID: <aa067ba4-4349-4157-b4d4-4139ecb26874@m3g2000hsc.googlegroups.com>

On May 9, 8:54?am, drjekil <drjeki... at gmail.com> wrote:
> i have a script which will do a specific task for a file in a folder,now i
> would like to do the same task ?for the all files in that folder(25
> files).how can i do that?
>
> Thanks in advance.
>
> --
> View this message in context:http://www.nabble.com/help-needed%21-tp17148388p17148388.html
> Sent from the Python - python-list mailing list archive at Nabble.com.

Use a loop, probably in combination with os.walk.

Mike


From arnodel at googlemail.com  Thu May  8 02:58:57 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 7 May 2008 23:58:57 -0700 (PDT)
Subject: The del statement
References: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>
Message-ID: <fe1758f9-d244-4e1a-8a4a-5c27a877d3c1@k13g2000hse.googlegroups.com>



George Sakkis wrote:
> One of the few Python constructs that feels less elegant than
> necessary to me is the del statement. For one thing, it is overloaded
> to mean three different things:
> (1) del x: Remove x from the current namespace
> (2) del x[i]: Equivalent to x.__delitem__(i)
> (3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

Note that the 'X = Y' construct has the corresponding three meanings:

(1) x = 4 # Bind x to 4 in the 'current namespace'
(2) x[i] = 4 # equivalent to x.__setitem__(i, 4)
(3) x.a = 4 # Equivalent to x.__setattr__('a', 4)

What conclusion should we draw from that?

--
Arnaud


From marlin_rowley at hotmail.com  Fri May 23 00:31:35 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Thu, 22 May 2008 23:31:35 -0500
Subject: How do I make a copy of my class object?
In-Reply-To: <g14pu5$phf$1@ger.gmane.org>
References: <BAY135-W134E8CAB38A2ACB2F5933F9FC60@phx.gbl>
	<g14pu5$phf$1@ger.gmane.org>
Message-ID: <BAY135-W185DB3142C0A6158064EE99FC10@phx.gbl>

Nevermind.
 
I ended up making a copy of everything within the class since I'm storing bitmaps anyway.  It works.
 
I'll read up more on the deepcopy() function.



> To: python-list at python.org> From: russblau at hotmail.com> Subject: Re: How do I make a copy of my class object?> Date: Thu, 22 May 2008 17:52:02 -0400> > "Marlin Rowley" <marlin_rowley at hotmail.com> wrote in message > news:BAY135-W134E8CAB38A2ACB2F5933F9FC60 at phx.gbl...> > I have a class object which has the usual data members and functions.> > I'm trying to make a copy of this class (which includes wx.Bitmap objects)> > but deepcopy() doesn't seem to work. How would I do this?> > Are you trying to make a copy of the "class object" or of a class instance?> > What error message are you getting when you call deepcopy() on this object?> > > > > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
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From bbxx789_05ss at yahoo.com  Sun May 11 15:19:01 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 11 May 2008 12:19:01 -0700 (PDT)
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> 
	<7qGVj.32505$KJ1.18416@newsfe19.lga> <m2abiw4rze.fsf@googlemail.com> 
	<h6HVj.32508$KJ1.28377@newsfe19.lga>
Message-ID: <da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>

On May 11, 12:42?pm, bc90021 <pyt... at bc90021.net> wrote:
> > It's difficult to know what's wrong with the code you posted because:
>
> > * it is not self-contained: otherFile, fileName, pattern are names
> > ? which you do not define;
>
> > * the IOError you reported earlier can't arise as a result of running
> > ? this code.
>
> > * you claim it works unless you put it in a subclass of
> > ? threading.Thread. ?Why don't you post this instead, and show us the
> > ? traceback?
>
> > HTH
>
> > FWIW, my crystal ball (whose predictions I don't usually report!) tells
> > me the same as Garry Herron's.
>
> Here's the thread class:
>
> #single file is the file we're working on, whose name is passed into the class and which does exist
> #matrix is a list of lists that contains info about the files - for this example, [c][0] contains a string, [c][2] contains true or false, and [c][3] contains a pattern to match
> #tfValue is another true or false value
>
> class FileProcThread(threading.Thread):
> ? ? ? ? def __init__(self, singleFile, matrix, tfValue):
> ? ? ? ? ? ? ? ? self.singleFile = singleFile
> ? ? ? ? ? ? ? ? self.matrix = matrix
> ? ? ? ? ? ? ? ? self.tfValue = tfValue
> ? ? ? ? ? ? ? ? threading.Thread.__init__(self)
> ? ? ? ? def run(self):
> ? ? ? ? ? ? ? ? (dirName, fileName) = os.path.split(self.singleFile)
> ? ? ? ? ? ? ? ? f = open(self.singleFile).readlines()
> ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? for i in range(len(f)):
> ? ? ? ? ? ? ? ? ? ? ? ? for c in range (len(self.matrix)):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (re.search(self.matrix[c][3], f[i])):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.matrix[c][2] == True):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = True
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if os.name == "posix":
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.tfValue == False):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp/" + self.matrix[c][0] + "_tmp_" + fileName +
> ".txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp/" + self.matrix[c][0] + "_other.txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (self.tfValue == False):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_tmp_" + fileName + ".txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? tempfileName = "\"proctemp\\" + self.matrix[c][0] + "_other.txt\""
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (re.search(self.matrix[c][4], f[i])):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? copying = False
> ? ? ? ? ? ? ? ? ? ? ? ? if (copying):
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? print "We're in copying, and tempfileName is: %s...\n" % tempfileName
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? #The above line correctly prints the temporary file name every time! ?The directory exists, too!
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g = open(tempfileName, 'a') ?#This does not work. ?Notice I do NOT have quotes around tempfileName, as I said.
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g.write(f[i])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? g.close()
>
> Like I said, this works FINE outside the thread class. ?I hope that the formatting comes through...

...and the exact error message was?

Here is a tip: if you want people to help you, then you have to help
them to help you.  Personally, I wouldn't respond to anymore of your
questions because you seem incapable of posting the information that
was requested.


From ludvig.ericson at gmail.com  Tue May 13 07:43:02 2008
From: ludvig.ericson at gmail.com (ludvig.ericson at gmail.com)
Date: Tue, 13 May 2008 04:43:02 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
Message-ID: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>

Hello,

My question concerns asynchat in particular. With the following half-
pseudo code in mind:

    class Example(asynchat.async_chat):
        def readable(self):
            if foo:
                self.push_with_producer(ProducerA())
            return asynchat.async_chat.readable(self)

Now, asyncore will call the readable function just before a select(),
and it is meant to determine whether or not to include that asyncore
dispatcher in the select map for reading.

The problem with this code is that it has the unexpected side-effect
of _immediately_ trying to send, disregarding if the async_chat object
is indeed writable or not.

The asynchat.push_with_producer (and .push as well)
call .initiate_send(), which in turn calls .send if there's data
buffered. While this might seem logical, it isn't at all.

Insinuate that when Example.readable is called, the socket has already
been closed. There are two possible scenarios where it could be
closed. a) The remote endpoint closed the connection, and b) the
producer ProducerA somehow closed the connection (my case).

Obviously, calling send on a socket that has been closed will result
in an error - EBADF, "Bad file descriptor".

So, my question is: Why does asynchat.push* call self.initiate_send?
Nothing in the name "push" suggests that it'll transmit immediately,
disregarding potential "closedness". Removing the two calls
to .initiate_send() in the two push functions would still mean data is
sent, but only when data can be sent - which is, IMO, what should be
done.

Thankful for insights,
Ludvig.


From bruno.42.desthuilliers at websiteburo.invalid  Thu May 22 03:44:16 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Thu, 22 May 2008 09:44:16 +0200
Subject: Bit of List replacing trouble (newbie)
In-Reply-To: <mailman.1463.1211432419.12834.python-list@python.org>
References: <mailman.1463.1211432419.12834.python-list@python.org>
Message-ID: <4835243e$0$19743$426a74cc@news.free.fr>

Zethex a ?crit :
> At the moment i'm doing a piece of work for school and I'm stuck at the
> moment.
> 
> I have a list of words, for example:
> 
> Sentence = ['A', 'dog', 'walked', 'across', 'the', 'street']

<ot>
Naming convention : variable names are all_lower, so s/Sentence/sentence/
</ot>

> 
> I have another list which I need to use to replace certain words, and its in
> the form of:
> 
> synonyms = [
>                   [canine, [dog, puppy, bulldog]],
>                   [ road, [street, avenue, court]]
>                                                              ]

NB : I assume this is :

synonyms = [
                   ['canine', ['dog', 'puppy', 'bulldog']],
                   [ 'road', ['street', 'avenue', 'court']],
]

and FWIW, I'd use a list of tuples, not a list of lists:

synonyms = [
  ('canine', ['dog', 'puppy', 'bulldog']),
  ('road', ['street', 'avenue', 'court']),
]

or even better a dict:

synonyms = {
  'canine' : ['dog', 'puppy', 'bulldog'],
  'road' :  ['street', 'avenue', 'court'],
}


> What the procedure must do is replace dog with canine, and street with road. 
> Therefore if a word is in the sentence and appears on the right side of the
> list entry, replace it with the left entry.
> 
> I can't seem to find a help file with what I'm after.

This is probably not something that you'll find in any 'help file'. As 
for almost everything algorithmic, the key is to have the appropriate 
data structure. In this case, the appropriate data structure is 
obviously a reversed index of the synonyms dict (assuming there is no 
duplicate word in the synonyms lists):

reversed_synomyms = dict()
for key, values in synonyms.items():
     for word in values:
         reversed_synonyms[word] = key

print reversed_synonyms

=> {'court': 'road', 'bulldog': 'canine', 'dog': 'canine', 'street': 
'road', 'puppy': 'canine', 'avenue': 'road'}


 From then, the replacement procedure is quite obvious:

solution = [reversed_synonyms.get(word, word) for word in sentence]


print solution
=> ['A', 'canine', 'walked', 'across', 'the', 'road']

HTH


From wizzardx at gmail.com  Thu May  8 08:37:51 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 14:37:51 +0200
Subject: python equivalent to perl's inplace edit mechanism
In-Reply-To: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
References: <170543c70805080511o348f38fam5c56c71fce4a6f37@mail.gmail.com>
Message-ID: <18c1e6480805080537k76bef462u210c4d0d51566885@mail.gmail.com>

> #!/usr/bin/env perl
> #chgit script
> $^I = '';
> while(<>) {
>   s/mike/dave/g;
>   print;
> }
>

#!/usr/bin/python
import sys
lines = open(sys.argv[1]).readlines()
open(sys.argv[1], 'w').writelines([line.replace('mike', 'dave') for
line in lines])


From banibrata.dutta at gmail.com  Wed May 14 01:30:02 2008
From: banibrata.dutta at gmail.com (Banibrata Dutta)
Date: Wed, 14 May 2008 11:00:02 +0530
Subject: What is self.file = file for?
In-Reply-To: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>
Message-ID: <3de8e1f70805132230g65b4a0a5mfb86382afea10998@mail.gmail.com>

__init__() is the object-constructor for TextReader class, accepting an
argument 'file' (reference to an Object). TextReader has a member variable /
attribute, called 'file' too (same name as the argument to __init__()). The
constructor is invoked when an object of TextReader class is being create.
At that point, the construct binds the reference of the passed file object,
to it's own instance-variable.

'self' is the equivalent of 'this' pointer in C++ as others have mentioned.
So 'self.file' is referring to the instance variable, on the left-hand-side
of the assignment operation, and the 'file' on the right-hand-side is the
method argument.

On 5/14/08, wxPythoner at gmail.com <wxPythoner at gmail.com> wrote:
>
> Hello!
>
> I have trouble understanding something in this code snippet:
>
> class TextReader:
>    """Print and number lines in a text file."""
>    def __init__(self, file):
>        self.file = file
>        .
>        .
>        .
>
>
> When would you do a thing like  self.file = file  ? I really don't
> find an answer on this. Please help me understand this.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
regards,
Banibrata
http://www.linkedin.com/in/bdutta
http://octapod.wordpress.com
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From paul.hankin at gmail.com  Tue May  6 16:19:31 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 6 May 2008 13:19:31 -0700 (PDT)
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
	<8f5d04d8-2ece-4e8b-9af9-eefec153d7bd@34g2000hsh.googlegroups.com>
Message-ID: <eae0e4f9-eff9-4e17-95ed-3f0ecb8047ec@34g2000hsf.googlegroups.com>

On May 6, 4:24?pm, cokofree... at gmail.com wrote:
> On May 6, 5:20 pm, krumbleb... at gmail.com wrote:
>
>
>
> > Hi - further to my earlier query regarding partial matches (which with
> > all your replies enabled me to advance my understanding, thanks), I
> > now need to reverse a dict.
>
> > I know how to reverse a list (with the reverse method - very handy),
> > but it doesn't seem possible to reverse a dict.
>
> > I suspect what I need to do is somehow go from:
>
> > thelist=list(thedict)
> > thelist.reverse()
> > thedict=dict(thelist)
>
> > Does anyone know how to convert / or reverse a dict?
>
> > thanks
>
> > kb.
>
> Issue 1: A dictionary is not ordered so cannot be reversed, as is.
>
> Saw something like this though:
>
> info = {"PHP":"17th May",
> ? ? ? ?"Perl":"15th June",
> ? ? ? ?"Java":"7th June",
> ? ? ? ?"Python":"26th May",
> ? ? ? ?"Tcl":"12th July",
> ? ? ? ?"MySQL":"24th May"}
>
> topics = info.keys()
> topics.sort()
> topics.reverse()
>
> for topic in topics:
> ? ?print "Next",topic,"course starts",info[topic]

Better:

for topic, when in sorted(topics.iteritems(), reverse=True):
    print 'Next %s course starts %s' % (topic, when)

--
Paul Hankin


From dullrich at sprynet.com  Tue May 27 10:52:25 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Tue, 27 May 2008 09:52:25 -0500
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
Message-ID: <as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>

On Tue, 27 May 2008 14:50:23 +0200, "Diez B. Roggisch"
<deets at nospam.web.de> wrote:

>David C. Ullrich wrote:
>
>> What version added decorators (using the
>> @decorator syntax)?
>> 
>> (Is there a general way I could have found out the answer myself?)
>> 
>> Is there a somthing such that "from __future__ import something"
>> will make decorators work in 2.5.2?
>
>They do work. They were introduced in python2.4

That's more or less what I thought, but...

Oh. Never mind the details, let's just say that having 2.3 and
2.5 installed on the same machine can lead to confusion 
about exactly which one you're running a script under.
Duh.

Sorry. Thanks. I don't suppose that decorators are available
from __future__ somehow in 2.3?


>Diez

David C. Ullrich


From victorsubervi at gmail.com  Thu May 15 10:48:45 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Thu, 15 May 2008 16:48:45 +0200
Subject: Custom Classes?
In-Reply-To: <op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
	<4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>
	<op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805150748o2000689en4582f79fb0103014@mail.gmail.com>

Well, you are right. It looks like one of those instances where I fixed
something and did not check to see if it influenced the problem now at hand.
Thanks again.
Victor


On 5/15/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Tue, 13 May 2008 15:10:21 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> I remember why I had the number with the getpic. It is because I display
>> several of these images on a single page, and apparently I cannot call the
>> same script and get more than one image from an HTML page.
>>
>
> That's not true. If you still have the example I posted a few weeks ago,
> you can use this script to show a full listing of all uploaded pictures.
> It's a small variation of album.py.
> I think you were saving the pictures on disk - DON'T do that. It's
> unnecesary, wastes time and disk space, and if not done properly one request
> interferes with the other.
>
> --
> Gabriel Genellina
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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From workitharder at gmail.com  Thu May 22 19:27:15 2008
From: workitharder at gmail.com (bukzor)
Date: Thu, 22 May 2008 16:27:15 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
Message-ID: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>

This question seems easy but I can't figure it out.
Lets say there's a function:

def f(a, *args):
    print a
    for b in args: print b

and elsewhere in your program you have a list and a dict like this:
args = [2, 3]
kwargs = {'a':1}

I'd like to get f() to print something like the following, but I can't
figure out how.
1
2


From sjmachin at lexicon.net  Sat May 10 19:42:06 2008
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 10 May 2008 23:42:06 GMT
Subject: Find more than one error at once
In-Reply-To: <68lhqrF2tlavsU1@mid.uni-berlin.de>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
	<68lhqrF2tlavsU1@mid.uni-berlin.de>
Message-ID: <482632cc$1@news.mel.dft.com.au>

Diez B. Roggisch wrote:
> Joseph Turian schrieb:
>> Is it possible to coax python to find more than one error at once?
> 
> What kind of errors? Syntax-errors? Then use one of the python source 
> code analyzers, such as pylint or pychecker.

I don't know about pylint, but "PyChecker works in a combination of 
ways. First, it imports each module. If there is an import error, the 
module cannot be processed." -- so it fails on the first syntax error. 
For example:

C:\junk>type syntaxerrors.py
if foo = bar:
     pass
foo = "unterminated
123 = foo

C:\junk>python -m pychecker.checker syntaxerrors.py
Processing syntaxerrors...
   SyntaxError: invalid syntax (syntaxerrors.py, line 1)
     if foo = bar:
            ^

Warnings...

syntaxerrors:1: NOT PROCESSED UNABLE TO IMPORT

C:\junk>




From phd at phd.pp.ru  Sun May  4 10:14:34 2008
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sun, 4 May 2008 18:14:34 +0400
Subject: SQLObject 0.9.6
Message-ID: <20080504141434.GB1321@phd.pp.ru>

Hello!

I'm pleased to announce version 0.9.6, a minor bug fix release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite,
Firebird, Sybase, MSSQL and MaxDB (also known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.9.6

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.9.5
----------------

Bug Fixes
~~~~~~~~~

* A bug in inheritable delColumn() that doesn't remove properties was fixed.

* A minor bug was fixed in col.py - the registry must be passed to findClass().

* Reverted the patch declarative.threadSafeMethod() - it causes more harm
  then good.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From gherron at islandtraining.com  Mon May 12 15:40:58 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 12 May 2008 12:40:58 -0700
Subject: question about python statements
In-Reply-To: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
Message-ID: <48289D4A.3020007@islandtraining.com>

Ohad Frand wrote:
>
> Hi
>
> I am looking for a way to programmically get a list of all python 
> existing statements that I cannot access by __builtins__ or locals()
>
> (like ["assert","break","class",?])
>
> Thanks,
>
> Ohad
>
> ------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
Sorry, I've no idea what you mean here. Perhaps you could help us by 
defining what you mean by
"statements that I cannot access by __builtins__ or locals()"

Is there any statement that you *can* access in such a way?

What does it even mean to "access a statement"?

Do you even have a list of "statements" from which we are to work? 
Python is a little unusual in what it considers statements.

Gary Herron






From skanemupp at yahoo.se  Mon May  5 15:29:58 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 12:29:58 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
	<0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>
	<c7df408b-0a5a-445b-877a-cf76384cccfd@k13g2000hse.googlegroups.com> 
	<a5d8d698-ea9d-460f-ae5f-20f0d4c01141@b1g2000hsg.googlegroups.com> 
	<mailman.593.1210000345.12834.python-list@python.org>
	<688n7kF2onffkU1@mid.uni-berlin.de>
Message-ID: <1e638f56-8a62-4748-88b2-f7781aeffb05@d1g2000hsg.googlegroups.com>

On 5 Maj, 17:25, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > directory = ['C:','Python25','myPrograms','pygameProgs','dront.mp3']
> > os.path.join(directory)
>
> > Then python can worry about the gritty details, and you don't have to.
>
> Or somewhat neater IMHO:
>
> os.path.join('C:','Python25','myPrograms','pygameProgs','dront.mp3')
>
> Diez

ty i solved it now, apparenly renaming a file it still has its native
filename...

it plays now when i run it from the shell but from the command line it
just blips and finishes right away.

also the sound is not very good, it is disturbed at some parts, why is
this?


From martin at v.loewis.de  Mon May 12 15:21:02 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 12 May 2008 21:21:02 +0200
Subject: py3k concerns. An example
In-Reply-To: <201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com>
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com>
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org>
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com>
	<4810977E.3060509@v.loewis.de>
	<201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>
Message-ID: <4828989e$0$842$9b622d9e@news.freenet.de>

> Well, my concerns about 3.0 continue to be founded.  Up until now I
> have been just reading "What's New" docs, and relying on input from
> others as to what changes I will have to make.  Yesterday I downloaded
> and installed 3.0a5, and it is clear that there is *no* way to have a
> single code base for any but the most trivial module.

I think there is a way, if you can use 2to3.

> The biggest sticking point is the incompatibility of "except" syntax.
> Apparently the promise of syntax compatibility in the 3.0a4 docs was
> an overstatement.  Syntax can't be conditionalized out with "if
> version >= 3:" type code, so I must have separate Python 2.x and
> Python 3.x codebases, as will anyone whose modules include exception
> handlers.

No, you don't need to maintain two code bases. Just maintain the 2.x
one, and generate the 3.x code every time you need it updated.

2to3 deals with the change to the except clauses just fine.

> I also tripped over the conversion from "<iterator>.next()" to
> "next(<iterator>)". 

2to3 should also fix that one. Alternatively, you can add your own
next implementation to 2.x.

> Conversion of print from statement to function is definitely more
> painful than I thought it would be.  Again, I am fortunate that this
> largely affects only my test code, with only minimal impact on my
> runtime module.

Again, 2to3 fixes these just fine.

> I continue to struggle with some of the refactoring done in references
> to func.func_code, im_self, etc. changing to __code__, __self__, and
> so on.

There are also 2to3 fixers for these, although they might be incomplete.

> By the way Martin, your work on 2to3 was especially helpful in this
> effort - thank you!

Thanks - but this is really Collin Winter's work (with various
contributions of others, of course).

> In summary, I am adjusting my plans for future support of Python
> versions in pyparsing.  As of a pyparsing release some time after
> August, I will only support Python 3.0 versions with any new features
> or bugfixes, and the pyparsing version that is compatible with Python
> 2.x will be frozen.

I don't want to interfere with your project plans, but I don't think
there is a factual need for such a process. Instead, you could continue
to write 2.x code, and produce 3.x code either at release or at install
time.

Regards,
Martin


From bronger at physik.rwth-aachen.de  Fri May 30 12:25:31 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 30 May 2008 18:25:31 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
	<b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>
	<Xns9AAD55E793C9Dduncanbooth@127.0.0.1>
	<mailman.1738.1212072560.12834.python-list@python.org>
	<Xns9AADA759AF2ABduncanbooth@127.0.0.1>
	<mailman.1752.1212098278.12834.python-list@python.org>
	<Xns9AAE5603C921Bduncanbooth@127.0.0.1>
	<87skw0s0jj.fsf@physik.rwth-aachen.de>
	<8LydnV1nb4Rqvt3VnZ2dnUVZ_gCdnZ2d@posted.visi>
Message-ID: <87abi7iwsk.fsf@physik.rwth-aachen.de>

Hall?chen!

Grant Edwards writes:

> On 2008-05-30, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>
>> Duncan Booth writes:
>>
>>> [...]
>>>
>>> I don't understand your problem: it's just a single thread so
>>> killfile or skip it.
>>
>> Although I agree with you that there is no problem, *this* is not
>> a good justification for this thread.  One should stay on topic
>> in *every* thread.
>
> [...]
>
> I wouldn't even consider the thread all that OT, but maybe that's
> just me.

Me too, and therefore I see no problem.  But one shouldn't break the
rules, relying on all others sticking to them.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From nagle at animats.com  Fri May 23 11:18:50 2008
From: nagle at animats.com (John Nagle)
Date: Fri, 23 May 2008 08:18:50 -0700
Subject: Database Query Contains Old Data
In-Reply-To: <d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
	<mailman.1420.1211374208.12834.python-list@python.org>
	<4f0163cc-d943-4204-87e5-880477d6f7e0@f36g2000hsa.googlegroups.com>
	<d28c6794-2d21-44f8-b6cc-5c9be6a203cd@z72g2000hsb.googlegroups.com>
Message-ID: <4836dcfe$0$34544$742ec2ed@news.sonic.net>

Paul Boddie wrote:
> On 21 Mai, 15:22, giraffe... at gmail.com wrote:
>> I did and I confirmed this by modifying the data, selecting it from
>> the mysql command line client to verify the changes, then running the
>> report again. If I exit the application and then start it again,
>> everything works as expected until the second instance of the report
>> is run.
> 
> Note that if you have a connection open in your program, especially if
> that connection has already been used to select data, it may be the
> case that you then have to perform a rollback or commit before
> attempting to access newly added data. 

     Exactly.  Although it seems counterintutive, it's not enough
to do a COMMIT after UPDATE and INSERT operations.  You also have to
do a COMMIT after a SELECT if you're going to reuse the database handle
and do another SELECT.  Otherwise, you reread the same data forever.

     COMMIT, by the way, is per database handle, so if you have
multiple database handles, each needs to handle its own COMMIT needs.

				John Nagle


From catphive at catphive.net  Tue May 13 22:14:56 2008
From: catphive at catphive.net (Brendan Miller)
Date: Tue, 13 May 2008 19:14:56 -0700
Subject: portable way to tell what Popen will call
Message-ID: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>

I need a portable way to tell what subprocess.Popen will call.

For instance on unix systems, Popen will work for files flagged with the
executable bit, whereas on windows Popen will work on files ending the in
.exe extension (and I don't think anything else). Is there a portable way
to check what Popen will work on without actually execute it? Do I have to
write a bunch of platform specific code here?

Thanks,
Brendan


From bruno.desthuilliers at gmail.com  Mon May  5 16:25:45 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Mon, 5 May 2008 13:25:45 -0700 (PDT)
Subject: Browser + local Python-based web server vs. wxPython
References: <mailman.588.1209997391.12834.python-list@python.org>
Message-ID: <9be526d8-4076-40bc-ab53-6098d9360c57@x35g2000hsb.googlegroups.com>

On 5 mai, 16:22, pyt... at bdurham.com wrote:
> I'm looking at rewriting some legacy VB applications and am pondering
> which of the following techniques to use:
>
> 1. Browser based GUI with local web server (Browser +
> wsgiref.simple_server) (I'm assuming that simple_server is class I want
> to build from for a local web server)
>
> -OR-
>
> 2. wxPython based GUI
>
> My thought is that a browser/local web server setup may be more portable
> to mobile environments than wxPython and may offer a way to scale a
> single user offline application to a multi-user online application using
> a remote vs. local web server. Some groups of users may feel more
> comfortable with a browser based interface as well.
>
> I'm looking for feedback from anyone that has pondered the same question
> as well as any pros/cons or tips from anyone that has chosen the
> browser/lcoal web server route.

Your question, in short, is web app vs rich GUI client app. Which is
nothing new (and not Python-specific FWIW).  And the answer depends
mostly on what your app do and what your target audience is.



From larry.bates at websafe.com`  Fri May  2 17:39:36 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 16:39:36 -0500
Subject: Need help: Compiling Python-Code &In-Reply-To=
In-Reply-To: <mailman.483.1209761575.12834.python-list@python.org>
References: <mailman.483.1209761575.12834.python-list@python.org>
Message-ID: <XPidnVS98e29F4bVnZ2dnUVZ_ramnZ2d@comcast.com>

CRAIG DALTON wrote:
> Hi, 
> 
> I'm looking to append several text files in one director and out put the combined files into another director. I'm new to Python and just can't get it to work. So far I've been able to create a file in the desired directory but it isn't pulling any of the data in the originating directory. Could please look at my code and tell me what I'm doing wrong.
> 
> import os,shutil
> f=open("c:\\output\\testing1.txt","a+")
> for r,d,fi in os.walk("c:\\test"):
>     for files in fi:
>         if files.endswith(".txt"):                         
>             g=open(os.path.join(r+,files))
>             shutil.copyfileobj(g,f)
>             g.close()
> f.close()
> 
> Any help would be great.
> 
> Thanks, 
> 
> Craig Dalton
> Business Applications Systems Analyst
> Sentara Healthcare Systems
> Information Technology
> cxdalton at sentara.com
> 
> 

I don't think what you pasted will work at all.  The r+ should produce a syntax 
error on the g=open(os.path.join(r+,files) line.

No real reason to get shutil involved in this.

try something like this (not tested):

outfp=open("c:\\output\\testing1.txt", 'w')
for root,dirs,files in os.walk("c:\\test"):
     for fname in files:
         if fname.endswith(".txt"):
             infp=open(os.path.join(root, fname), 'r')
             of.write(infp.read())
             infp.close()

outfp.close()

or if the files are binary:

use 'wb' and 'rb' instead of 'w' and 'r'

BTW - This will concatenate ALL the .TXT files in c:\test as well as any files 
in any subfolders into a single output file.

-Larry


From deets at nospam.web.de  Sat May  3 11:31:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 03 May 2008 17:31:34 +0200
Subject: pygame.key.get_pressed[K_a], K_a is not defined!?
In-Reply-To: <bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
References: <c54c1c2a-64a1-45d7-bbc3-1d8343aad824@l64g2000hse.googlegroups.com>
	<680su7F2q6qo2U1@mid.uni-berlin.de>
	<bd79259b-b8d3-4bf1-9f34-deb42b9530f9@a23g2000hsc.googlegroups.com>
Message-ID: <683eqqF2mr6f5U1@mid.uni-berlin.de>

globalrev schrieb:
> On 2 Maj, 18:13, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> globalrev schrieb:
>>
>>> if pygame.key.get_pressed[K_a]:
>>>             print "Muppet"
>>> K_a is not defined.
>>> but yes it is. why do i get this error?
>> No it isn't - otherwise you wouldn't get this error, wouldn't you?
>>
>> What IS defined is
>>
>> pygame.K_a
>>
>> Or if you do
>>
>> from pygame import K_a
>>
>> then K_a is defined as well.
>>
>> Diez
> 
> ok thanks
> if (key.get_pressed[K_t] and key.get_pressed[K_f]):
>      print "Yup!"
> 
> said int he tut it confused me.
> 
> 
> anyway i changed it and the list or dict from keygetpressed is all
> zeros but the K_a always is true whether i push it or not.

most probably because

key.get_pressed[K_t]

is bogus. It's a method you need to call that returns a list of bools 
that are True for a given index if the key is pressed. Which the 97 is - 
an index to that.


Did you actually bother to read the docs?

http://www.pygame.org/docs/ref/key.html#pygame.key.get_pressed

Diez


From dgetsman at amirehab.net  Wed May 21 12:47:57 2008
From: dgetsman at amirehab.net (Damon Getsman)
Date: Wed, 21 May 2008 09:47:57 -0700 (PDT)
Subject: issues simply parsing a whitespace-delimited textfile in python 
	script
References: <a6869a3a-d855-41bb-8045-696122889a28@25g2000hsx.googlegroups.com>
	<085a3a40-5e58-4523-8815-092a9a52a258@k30g2000hse.googlegroups.com>
Message-ID: <5a2b72ea-0964-4f0b-b9cf-383bd9aa9830@59g2000hsb.googlegroups.com>

On May 21, 11:15 am, Paul McGuire <pt... at austin.rr.com> wrote:
> <snip>
>
>     for cur_rec in Lastdump.readline():
>
> is the problem.  readline() returns a string containing the next
> line's worth of text, NOT an iterator over all the subsequent lines in
> the file.  So your code is really saying:
>
>     next_line_in_file = Lastdump.readline():
>     for cur_rec in next_line_in_file:
>
> which of course, is iterating over a string character by character.
>
> Since you are opening Lastdump (not great casing for a variable name,
> BTW - looks like a class name with that leading capital letter), it
> gives you an iterator already.  Try this instead:
>
> lastdump = open('/tmp/esd_tmp', 'r')
>
> cur_rec = lastdump.next()
>
> ...
>
>     for cur_rec in lastdump:
>
> ...
>
> This should get you over the hump on reading the file.
>
> Also, may I suggest this method for splitting up each record line, and
> assigning individual fields to variables:
>
>     user,s1,s2,day,month,date,time,desc = cur_rec.split(None,7)
>
> -- Paul

Well the individual variables isn't exactly appropriate as I'm only
going to be using 2 of the fields.  I think I will set those to
individual variables with a slice of what you mentioned, though, for
readability.  Thank you for the tips, they were all much appreciated.

-Damon


From ptmcg at austin.rr.com  Sun May 18 15:07:33 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 18 May 2008 12:07:33 -0700 (PDT)
Subject: Compress a string
References: <op.ubc28kc14fd8pl@mp1206-hp.config>
	<mailman.1319.1211136639.12834.python-list@python.org>
Message-ID: <fa9bc41d-8ba6-4377-b068-eff22b48ea3a@m45g2000hsb.googlegroups.com>

On May 18, 1:45?pm, Gary Herron <gher... at islandtraining.com> wrote:
> Matt Porter wrote:
> > Hi guys,
>
> > I'm trying to compress a string.
> > E.g:
> > ?"AAAABBBC" -> "ABC"
>

I'm partial to using (i)zip when I need to look at two successive
elements of a sequence:

>>> from itertools import izip
>>> instr = "aaaaaaaaaaabbbbbbbbbbdddddaaaaaaaddddddccccccc"
>>> newstr = "".join( b for a,b in izip(" "+instr,instr) if a!=b )
>>> print newstr
abdadc

-- Paul



From andrew at acooke.org  Sat May 31 12:46:45 2008
From: andrew at acooke.org (andrew cooke)
Date: Sat, 31 May 2008 09:46:45 -0700 (PDT)
Subject: method-wrapper?
Message-ID: <597ecdea-bd88-429c-8b64-03efd4fb0d93@z72g2000hsb.googlegroups.com>

Hi,

Within Python (2.5):

 >>> help("__str__")
 Help on method-wrapper object:
 __str__ = class method-wrapper(object)
  |  Methods defined here:
  |
  |  __call__(...)
  |      x.__call__(...) <==> x(...)
  |
  |  __cmp__(...)
  |      x.__cmp__(y) <==> cmp(x,y)
  [...]

What is "method-wrapper"?  Google turns up hardly any hits, same with
searching python.org.

Thanks,
Andrew


From skanemupp at yahoo.se  Mon May  5 10:09:38 2008
From: skanemupp at yahoo.se (globalrev)
Date: Mon, 5 May 2008 07:09:38 -0700 (PDT)
Subject: pygame music, cant read mp3?
References: <30fe7c79-dbac-47bb-9e29-bea61b7c3da8@56g2000hsm.googlegroups.com>
	<688af0F2pc3jjU1@mid.uni-berlin.de>
	<5e52e1b5-8698-4ba1-8fc2-180ba20491cb@m73g2000hsh.googlegroups.com>
	<mailman.576.1209989876.12834.python-list@python.org>
Message-ID: <0038dede-85c0-4d4d-a347-a4d23cab23ad@d45g2000hsc.googlegroups.com>

On 5 Maj, 14:17, "Wojciech Walczak" <wojtek.gminick.walc... at gmail.com>
wrote:
> 2008/5/5, globalrev <skanem... at yahoo.se>:
>
> > pygame.mixer.music.load('C:/Python25/myPrograms/pygameProgs/example1.mp3')
>
> Are you sure that:
>
> os.path.exists('C:/Python25/myPrograms/pygameProgs/example1.mp3') == True?
>
> Check it with python.
>
> --
> Regards,
> Wojtek Walczakhttp://www.stud.umk.pl/~wojtekwa/


>>> import os
>>> os.path.exists('C:/Python25/myPrograms/pygameProgs/dront.mp3') == True
False


but...it is there....

>>> os.path.exists('C:\Python25\myPrograms\pygameProgs\dront.mp3') == True
False

does it matter if i use / or \? which si recommended?


From iainking at gmail.com  Thu May 22 06:01:20 2008
From: iainking at gmail.com (Iain King)
Date: Thu, 22 May 2008 03:01:20 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1453.1211404808.12834.python-list@python.org>
	<bf8094bf-f40f-4917-8506-41cb500fdcbb@x19g2000prg.googlegroups.com>
	<69jlk4F330nmpU1@mid.uni-berlin.de>
	<d2e43589-3a62-4ed2-a126-cdca63398258@g16g2000pri.googlegroups.com>
	<f564d6f5-a6cf-45de-986e-eac1f2aaae04@r66g2000hsg.googlegroups.com>
Message-ID: <f04e9fac-1250-47be-bd15-0efc7758ce97@r66g2000hsg.googlegroups.com>

On May 22, 1:14 am, bukzor <workithar... at gmail.com> wrote:
> On May 21, 3:28 pm, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > On May 21, 4:21 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > Which is exactly what the python decimal module does.
>
> > Thank you (and Jerry Hill) for pointing that out.  If I want to check
> > Flaming Thunder's results against an independent program, I'll know to
> > use Python with the decimal module.
>
> Utterly shameless.

You may find a more appreciative (and less antagonised) audience for
your language in comp.lang.cobol


From ptmcg at austin.rr.com  Tue May 27 20:26:51 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 27 May 2008 17:26:51 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
References: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>
Message-ID: <35828b4f-996b-486c-84a7-f5a51d13dd22@f36g2000hsa.googlegroups.com>

On May 27, 5:01?am, Magnus.Morab... at gmail.com wrote:
> Hi,
>
> I wish to extract all the words on a set of webpages and store them in
> a large dictionary. I then wish to procuce a list with the most common
> words for the language under consideration. So, my code below reads
> the page -
>
> http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm
>
> a welsh language page. I hope to then establish the 1000 most commonly
> used words in Welsh. The problem I'm having is that
> soup.findAll(text=True) is returning the likes of -
>
> u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"'
>
> and -
>
> <a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"
>
> Any suggestions how I might overcome this problem?
>
> Thanks,
>
> Barry.
>
> Here's my code -
>
> import urllib
> import urllib2
> from BeautifulSoup import BeautifulSoup
>
> # proxy_support = urllib2.ProxyHandler({"http":"http://
> 999.999.999.999:8080"})
> # opener = urllib2.build_opener(proxy_support)
> # urllib2.install_opener(opener)
>
> page = urllib2.urlopen('http://news.bbc.co.uk/welsh/hi/newsid_7420000/
> newsid_7420900/7420967.stm')
> soup = BeautifulSoup(page)
>
> pageText = soup.findAll(text=True)
> print pageText

As an alternative datapoint, you can try out the htmlStripper example
on the pyparsing wiki: http://pyparsing.wikispaces.com/space/showimage/htmlStripper.py

-- Paul


From mnikhil at gmail.com  Tue May 20 14:21:06 2008
From: mnikhil at gmail.com (Nikhil)
Date: Tue, 20 May 2008 23:51:06 +0530
Subject: AttributeError: module object has no attribute
References: <g0v1r3$ikn$1@registered.motzarella.org>	<g0v2vs$38b$01$1@news.t-online.com>
	<483311EB.1040307@gmail.com> <69gilkF30tko7U1@mid.uni-berlin.de>
Message-ID: <g0v4qi$4dk$2@registered.motzarella.org>

Marc 'BlackJack' Rintsch wrote:
> On Tue, 20 May 2008 23:31:15 +0530, Nikhil wrote:
> 
>> Peter Otten wrote:
>>> Nikhil wrote:
>>>
>>>> I have recently written a small module. When I import the module, I
>>>> always get the error
>>>>
>>>>
>>>> only when I do
>>>>
>>>>  >>> from local.my.module import *
>>>>
>>>> --
>>>> Traceback (most recent call last):
>>>>    File "<stdin>", line 1, in <module>
>>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>>> ---
>>>>
>>>>
>>>> but when I do the below, I do not get any error.
>>>>
>>>> --
>>>>  >> import local.my.module
>>>>  >>
>>>> --
>>>>
>>>> Any ideas on what could be wrong?
>>> Are you abusing the __all__ attribute?
>>>
>>> $ cat tmp.py
>>> __all__ = ['/xyz/py/file']
>>>
>>> $ python -c "from tmp import *"
>>> Traceback (most recent call last):
>>>   File "<string>", line 1, in <module>
>>> AttributeError: 'module' object has no attribute '/xyz/py/file'
>>>
>> Yes, I am. Is there any reason not to?
> 
> That your module raises the `AttributeError` and is broke is not reason
> enough!?  :-)
> 
>> basically, since this is implemented in the module, I have to export it 
>> since the caller to the function in the module is responsible for 
>> ensuring he has enough proper permissions to read the file.
> 
> What do you mean by "implemented in the module"?  `__all__` is for names
> that live in the module's namespace -- '/xyz/py/file' isn't even a legal
> identifier name in Python!
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch.
Okay.. thanks :-)

I removed the entry from __all__, and I earlier assumed the module to 
break, but it did not. Thanks again :-)



From wizzardx at gmail.com  Wed May  7 03:36:50 2008
From: wizzardx at gmail.com (David)
Date: Wed, 7 May 2008 09:36:50 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
Message-ID: <18c1e6480805070036n4d2112d7je5a1f154a5c3f76c@mail.gmail.com>

>
>  Google for "overlapping markup" and "python overlapping markup" for
>  more information. Here's one interesting page I found:
>

I found an interesting markup called LMNL, which supports overlapping markup:

http://lmnl.net/

Also, a survey which compares various markup languages, including LMNL:

http://www.cl.cam.ac.uk/~sjm217/projects/markup/survey/

I'm mainly mentioning this because of your past mail where you asked
for existing formats that could meet your needs.

For now your current markup should be fine. But you should research
LMNL too. You can information here also:

http://www.lmnl.org/wiki/index.php/Main_Page

Another, related markup is Creole:

http://www.lmnl.org/wiki/index.php/Creole

David.


From fiacre.patrick at gmail.com  Fri May 23 03:21:09 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 03:21:09 -0400
Subject: [Regexes] Stripping puctuation from a text
In-Reply-To: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>
References: <d3aaf096-e074-4994-968b-232a04b0b751@e39g2000hsf.googlegroups.com>
Message-ID: <48367065$0$11627$607ed4bc@cv.net>

shabda raaj wrote:
> I want to strip punctuation from text.
> 
> So I am trying,
> 
>>>> p = re.compile('[a-zA-Z0-9]+')
>>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
> '  !!  ! ... ?'
> 
> Which gave me all the chars which I want to replace.
> 
> So Next I tried by negating the regex,
> 
>>>> p = re.compile('^[a-zA-Z0-9]+')
>>>> p.sub('', 'I love tomatoes!! hell yeah! ... Why?')
> ' love tomatoes!! hell yeah! ... Why?'
> 
> But this removed the first char instead of the puctuation. So I guess
> ^ is matching start of line, instead of negation. How can I take
> negation of the regex here?


p = re.compile('[^a-zA-Z0-9]+')


From castironpi at gmail.com  Fri May  9 10:01:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Fri, 9 May 2008 07:01:06 -0700 (PDT)
Subject: How to modify meaning of builtin function "not" to "!"?
References: <fcdd681d-7786-4a09-8ba6-a2865352dfa1@k10g2000prm.googlegroups.com>
Message-ID: <e1b1663a-1ceb-4851-b061-dfd043f0ed99@k37g2000hsf.googlegroups.com>

On May 9, 8:41?am, grbgooglefan <ganeshbo... at gmail.com> wrote:
> I am creating functions, the return result of which I am using to make
> decisions in combined expressions.
> In some expressions, I would like to inverse the return result of
> function.
>
> E.g. function contains(source,search) will return true if "search"
> string is found in source string.
> I want to make reverse of this by putting it as:
> if ( ! contains(s1,s2) ):
> ? ? ?return 1
>
> I found that "!" is not accepted by Python & compile fails with
> "invalid syntax".
> Corresponding to this Boolean Operator we've "not" in Python.
>
> How can I make "not" as "!"?

I have found that not 8, not not 8, and ~8 are all valid.  Valid8 is
not.

NameError: name 'Valid8' is not defined, where defined is not defined,
and @Valid8 @Valid8 ...

Late-binding logicals are fine.  #Valid8


From skanemupp at yahoo.se  Tue May 13 15:27:24 2008
From: skanemupp at yahoo.se (globalrev)
Date: Tue, 13 May 2008 12:27:24 -0700 (PDT)
Subject: python: lexical or dynamic scope?
Message-ID: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>

i cant figure outif python has lexical or general scope.

it seems functions have lexical scope but with some restrictions and
some non-function scopes are dynamic?


From vivainio at gmail.com  Mon May  5 12:38:08 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Mon, 05 May 2008 16:38:08 GMT
Subject: Python application distribution
In-Reply-To: <mailman.424.1209664569.12834.python-list@python.org>
References: <mailman.424.1209664569.12834.python-list@python.org>
Message-ID: <481F37EE.4070908@gmail.com>

ron.longo wrote:

> unable to execute.  Why is this?  At this point I'm not really keen on
> handing out the source files to my application, it feels unprofessional.

If you plan to deploy on windows, py2exe could be the more 
"professional" approach you are thinking of.


From krustymonkey at gmail.com  Thu May  8 11:55:35 2008
From: krustymonkey at gmail.com (krustymonkey at gmail.com)
Date: Thu, 8 May 2008 08:55:35 -0700 (PDT)
Subject: pickle problem
References: <dfb3ed43-743a-43d5-9212-ec39e2210c3b@26g2000hsk.googlegroups.com>
	<68g456F2t41nqU1@mid.uni-berlin.de>
Message-ID: <97b9fbd1-3725-4a7d-9ecb-1d2af6f35665@y21g2000hsf.googlegroups.com>

On May 8, 5:48 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> krustymon... at gmail.com wrote:
> > I'm wondering if anyone can help with a workaround for a problem I
> > currently have.  I'm trying to set up a prefork tcp server.
> > Specifically, I'm setting up a server that forks children and has them
> > listen on pipes created with os.pipe().  The parent process for the
> > group starts an inet:tcp server on a given port.  In the parent, after
> > a "socket.accept()", I'm trying to pickle the connection object to
> > send over an IPC pipe (as stated previously), but I get the following
> > error:
>
> > File "/usr/lib/python2.4/copy_reg.py", line 76, in _reduce_ex
> >     raise TypeError("a class that defines __slots__ without "
> > TypeError: a class that defines __slots__ without defining
> > __getstate__ cannot be pickled
>
> > Does anyone know of a workaround for this?  Maybe my approach to this
> > is wrong?  Any help would be appreciated.
>
> The error-message is pretty clear I'd say. You use slots - so you are
> responsible yourself for implementing the pickling-protocol using
> __getstate__ and __setstate__. Looking at the pickle-docs should give you
> an idea.
>
> But the really easy solution is: do not use slots. They are intended as
> memory-consumption optimization technique, *not* as "I want to declare my
> attributes explicitly"-mechanism. So - get rid of them and be a happy
> pickler.
>
> Diez

The thing is, I'm not using slots by choice.  I'm using the standard
lib "socket" class, which apparently uses slots.


From basti.wiesner at gmx.net  Wed May 28 13:54:23 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Wed, 28 May 2008 19:54:23 +0200
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
	<EIWdnV_Wqu9zeKHVnZ2dnUVZ_szinZ2d@earthlink.com>
	<15b59f39-3983-4795-9482-d265a67a4fde@f63g2000hsf.googlegroups.com>
	<6a4oumF3464loU1@mid.uni-berlin.de>
Message-ID: <g1k69v$vk5$02$1@news.t-online.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

[ Marc 'BlackJack' Rintsch <bj_666 at gmx.net> ]

> On Wed, 28 May 2008 02:28:54 -0700, bearophileHUGS wrote:
> 
>> Dennis Lee Bieber, the ghost:
>>> I'd have to wonder why so many recursive calls?
>> 
>> Why not?
> 
> Because of the recursion limit of course.  And function call overhead in
> Python is quite high compared to an iterative approach.
And limiting the recursion depth is quite reasonable: The python interpreter
doesn't perform tail call optimisation, each level of recursion depth eats
a bit more memory.  Without a recursion limit a python process might hit
the memory restrictions of the OS kernel, which would cause the OS kernel
to just silently kill the interpreter process.  Now image this happening
inside a mission critical server process ;)


- -- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)
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From workitharder at gmail.com  Fri May 23 12:12:52 2008
From: workitharder at gmail.com (bukzor)
Date: Fri, 23 May 2008 09:12:52 -0700 (PDT)
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com> 
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net> 
	<x_wZj.2757$772.652@bignews2.bellsouth.net>
Message-ID: <69670280-f9e7-43f8-9750-09374f907332@j33g2000pri.googlegroups.com>

On May 23, 3:29?am, "inhahe" <inh... at gmail.com> wrote:
> "inhahe" <inh... at gmail.com> wrote in message
>
> news:MKwZj.2749$772.668 at bignews2.bellsouth.net...
>
> > if we assume the constraints are that:
> > 1.he has list, l
> > 2.he has a dictionary, d
> > 3.he wants the function to print the values in the dictionary according to
> > a specific order of their keys as defined by the function, followed by the
> > values of the list
>
> It's also possible (even likely) that he knows outside of the function what
> order he wants the values in, and only used an (incidentally) unordered dict
> called kwargs because he thought that's the only way to pass to those
> parameters. ?in which case the function could be left untouched and the he
> would call it like this:
>
> args = [1,2,3]
> f(*args)
> or
> f(*[1,2,3])

The actual application is an option-parser wrapper (it inherits from
optparse.OptionParser). I use the option setting to generate a dict of
the entry-point arguments versus the values specified by the
commandline. This works well. I can then do main(**options).

I was trying to add support for an entrypoint signature like
main(a,b,c,*argv) so that you can have a script with a variable number
of arguments. I can then make a script like: ./script.py a b c ...,
which requires quotes right now. (The actual application is a command
wrapper, where I would like to just add the script to the front of a
command without modification.)

It's easy to get the dictionary I had previously (of arguments versus
values) and a list of extraneous values to be passed to argv, but I
realized that main(*argv, **options) wasn't going to work.

I wish this worked:
>>> def main(a,b,*argv): pass
>>> options['argv'] = argv
>>> main(**options)
TypeError: main() got an unexpected keyword argument 'argv'


Thanks for the help,
--Buck


From jpeyret at gmail.com  Sat May 24 19:57:43 2008
From: jpeyret at gmail.com (J Peyret)
Date: Sat, 24 May 2008 16:57:43 -0700 (PDT)
Subject: Newbie Question: How to use a .pth file on a Macintosh
References: <09c544bc-d518-4afa-ac39-3337f93306e2@i36g2000prf.googlegroups.com>
Message-ID: <21fce204-a3d5-4252-b1e2-91a3fae13649@w8g2000prd.googlegroups.com>

Hmmm, for lack of a better response, here are some suggestions, based
on what I've seen on Windows+Linux.

#1 put the .pth in the site-packages directory (this is what I do on
Linux).  I think Python considers it special and looks for pth.

you can probably get that directory from doing

import sys
for i in sys.path:
    print i

#2 put the .pth in the directory where the python executable is
located (this is less messy on Windows than on Linux or OS X)

which python (run on the OS X terminal command shell) should give you
an idea of where that is.

#3 Another idea is to use the Finder to find _other_ *.pth files that
may exist and put yours in the same location.

Best of luck.


From gagsl-py2 at yahoo.com.ar  Fri May  2 17:48:54 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 18:48:54 -0300
Subject: 'property' builtin does not work for me
References: <c22835810805021429s593d9012t6ffb263604d2bfa@mail.gmail.com>
Message-ID: <op.uajqvs1vx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 18:29:57 -0300, Alex Fainshtein  
<alex_fainshtein at netzero.net> escribi?:

> Question: what I am doing wrong? Here, I am defining class with property
> member:
>
> class Test:
>
>     def getter(self):
>         print "Getter called."
>         return 'a'
>
>     def setter(self, val):
>         print "Setter called."
>
>     prop = property(getter, setter)

property requires a new-style class; change the first line to class  
Test(object):
http://docs.python.org/lib/built-in-funcs.html#l2h-57

-- 
Gabriel Genellina



From __peter__ at web.de  Fri May 16 09:19:41 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 May 2008 15:19:41 +0200
Subject: class problem, NoneType obj has no attribute
References: <10bbf997-3520-4920-b225-8685b98d9079@59g2000hsb.googlegroups.com>
	<mailman.1221.1210938658.12834.python-list@python.org>
	<g0jslc$paa$01$2@news.t-online.com>
	<9355f9ed-032c-44e1-bf8d-183092e5b201@e53g2000hsa.googlegroups.com>
Message-ID: <g0k1la$vgb$02$1@news.t-online.com>

globalrev wrote:

> On 16 Maj, 13:54, Peter Otten <__pete... at web.de> wrote:
>> Christian Heimes wrote:
>> > globalrev schrieb:
>> >> cust1 = customer.__init__('12',['1','435','2332'])
>>
>> > cust1 = customer('12',['1','435','2332'])
>>
>> ... and before that
>>
>> from customer import customer
>>
>> Peter
> 
> why do i have to write that?
> 
> if i do import customer im importing everything no?
> 
> but youre right it doesnt work unless i do, i just dont get why.

It becomes clearer if you follow the usual naming conventions and start the
class name with an uppercase letter:


# in file customer.py

class Customer:
   # your code

The import then becomes

from customer import Customer

i. e. the first "customer" denotes the module, the second "Customer" the
class.

Peter



From skanemupp at yahoo.se  Wed May  7 17:38:15 2008
From: skanemupp at yahoo.se (globalrev)
Date: Wed, 7 May 2008 14:38:15 -0700 (PDT)
Subject: explain this function to me, lambda confusion
Message-ID: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>

i have a rough understanding of lambda but so far only have found use
for it once(in tkinter when passing lambda as an argument i could
circumvent some tricky stuff).
what is the point of the following function?

def addn(n):
		return lambda x,inc=n: x+inc

if i do addn(5) it returns


>>> def addn(n):
		return lambda x,inc=n: x+inc


>>> addn(5)
<function <lambda> at 0x01D81830>


ok? so what do i write to make it actually do something. and is the
inc=n necessary i cant do x+n?


From bj_666 at gmx.net  Sun May 25 03:30:44 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 May 2008 07:30:44 GMT
Subject: recursion with or without return?
References: <5fe0c5e3-8063-4e84-a40a-3d1938671a80@z72g2000hsb.googlegroups.com>
Message-ID: <69sit4F34jb08U2@mid.uni-berlin.de>

On Sun, 25 May 2008 00:00:14 -0700, notnorwegian wrote:

> when using recursion should one use a return statement or not?

This decision has nothing to do with recursion.  It's the same as in
non recursive functions.  If the function calculates something that you
want to return to the caller you have to use ``return``.  If the function
just has side effects, e.g. printing a tree structure recursively, you
don't have to ``return`` something.

> but is there a guideline for this or it just taste or is it
> considering good style or pythonic to always have a returnvalue?

Well, you always have a return value anyway because there's an implicit
``return None`` at the end of every function.

Ciao,
	Marc 'BlackJack' Rintsch


From tobik00000 at vp.pl  Fri May  9 17:48:47 2008
From: tobik00000 at vp.pl (ddda)
Date: Fri, 9 May 2008 14:48:47 -0700 (PDT)
Subject: BEST VIDEO sex!
Message-ID: <085943bf-e3fc-42b4-b603-41814bd9a294@a70g2000hsh.googlegroups.com>

Best Viedo! SEXI *-*!!
http://rozrywka.yeba.pl/show.php?id=2079
http://rozrywka.yeba.pl/show.php?id=2073


From kyosohma at gmail.com  Fri May 30 14:27:39 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 30 May 2008 11:27:39 -0700 (PDT)
Subject: Generating event from event
References: <37f8a6a1-dc98-4985-a84d-f74ead1ec2b7@z72g2000hsb.googlegroups.com>
	<Mq2dnVu3QO8Pmd3VnZ2dnUVZ_g-dnZ2d@comcast.com>
	<d8f2378a-cb28-49da-aece-09fab2879122@z72g2000hsb.googlegroups.com>
	<6aanqgF36mnldU1@mid.uni-berlin.de>
	<2980f056-a68f-4d8e-9104-642ef5911fcf@k37g2000hsf.googlegroups.com>
Message-ID: <82471cd7-55bb-4376-bcae-3a601ed8f75a@c65g2000hsa.googlegroups.com>

On May 30, 12:11?pm, Gandalf <goldn... at gmail.com> wrote:
> Hi Diez, I can't see how it ?matter which GUI-Toolkit i uses because I
> can combine libraries.
> I think all that matter is that i work with windows XP.
>
> if you ever done something like that or you familiar with article
> which can show me how to implement what I asked it would help me
>
> Thank you very much

It matters because each Python GUI toolkit works differently. Tkinter
does it via Tk/tcl calls, wxPython uses the wx library and pyGTK does
it in yet another way. The basic ideas are the same, but the
implementations are quite different.

In wx, for example, there are mouse events called wx.MouseEvent:

http://www.wxpython.org/docs/api/wx.MouseEvent-class.html

In Tkinter, they do the same thing, but the calls are almost
completely different. See the following for examples:

http://www.pythonware.com/library/tkinter/introduction/events-and-bindings.htm

You probably either want the MouseEvents or to create an
AcceleratorTable.

Mike


From squareswallower at yahoo.com  Sat May  3 17:12:54 2008
From: squareswallower at yahoo.com (dave)
Date: Sat, 3 May 2008 15:12:54 -0600
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com> <m2r6cjksw6.fsf@googlemail.com>
Message-ID: <fvikgm$gig$1@news.xmission.com>

thanks Duncan and Arnaud.

I'm learning Python from the "How to Think Like a Python Programmer" 
book by Allen Downey.  My first try used the "inv[val] = [key]" and 
then the next problem was to incorporate the "D.setdefault(...)" method.

Thank you for your help.  I'm always amazed how kind people are in this group.

On 2008-05-03 14:57:29 -0600, Arnaud Delobelle <arnodel at googlemail.com> said:

> dave <squareswallower at y1a2hoo3.com> writes:
> 
>> Hello,
>> 
>> here is a piece of code I wrote to check the frequency of values and
>> switch them around to keys in a new dictionary.  Just to measure how
>> many times a certain key occurs:
>> 
>> def invert(d):
>> 	inv = {}
>> 	for key in d:
>> 		val = d[key]
>> 		if val not in inv:
>> 			inv.setdefault(val, [key])
> You can simply write:
>                         inv[val] = [key]
>> 		else:
>> 			inv[val].append(key)
>> 	return inv
>> 
>> 
>> Using the methods above (I'm just a beginner) could I have written it
>> more concisely?  Any criticism/critique in the code would be greatly
>> appreciated.
> 
> Apart from the unnecessary use of setdefault, it looks good to me.
> 
> * You could change if 'val not in inv:' to 'if val in inv:' (and swap
>   the if and else clauses of course) in order to have a positive
>   condition rather than a negative one
> 
> * If you want to use setdefault, you can replace the if .. else
>   construct by:
> 
>                inv.setdefault(val, []).append(key)
> 
> * You can also iterate over keys and values using the items() or
>   iteritems() method of dictionaries:
> 
> def invert(d):
>     inv = {}
>     for key, val in d.iteritems():
>         inv.setdefault(val, []).append(key)
>     return inv




From pavlovevidence at gmail.com  Wed May  7 13:57:03 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 7 May 2008 10:57:03 -0700 (PDT)
Subject: License selection for free software
References: <mailman.314.1209455922.12834.python-list@python.org> 
	<ve1szjy2.fsf@gmail.com>
	<3a8e0a8f-3bd1-4650-9104-5c273f14b097@w7g2000hsa.googlegroups.com>
	<1w4gs9bk.fsf@gmail.com> <87ve1se6q5.fsf_-_@benfinney.id.au> 
	<8763tr5ov1.fsf@gmail.com>
	<6b46e4e9-4c71-47b7-aac8-3d3340b61b64@26g2000hsk.googlegroups.com>
Message-ID: <6b6e0eec-a570-4a58-8c8b-72e1cf23d9d7@a1g2000hsb.googlegroups.com>

On May 7, 6:56 am, Paul Boddie <p... at boddie.org.uk> wrote:
> On 6 Mai, 19:22, vivai... at gmail.com (Ville M. Vainio) wrote:
> > I don't think BSD/MIT like license really annoys anyone. Think python
> > here ;-)
>
> As some have pointed out, it can discourage people from contributing.
> I've said many times before that some companies might not contribute
> to a permissively licensed project because their competitors could
> leverage the benefit in proprietary software, and I consider Linux and
> the involvement of companies like IBM to be a reasonable example of
> this.

That IBM and other companies are involved with Linux is an example of
companies that are willing to get involved with GPL; it says nothing
about whether those companies would be more, less, or un- willing to
also get involved with more permissive licenses.

IBM is also involved with Apache, which does have a permissive
license.


Carl Banks


From matt.trevor at gmail.com  Thu May 22 20:57:31 2008
From: matt.trevor at gmail.com (Matthew Trevor)
Date: Thu, 22 May 2008 17:57:31 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
	<b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>
	<%viZj.78717$%15.59308@bignews7.bellsouth.net>
Message-ID: <fb16e2cd-f52a-4389-9203-aa687298efa6@c19g2000prf.googlegroups.com>

On May 23, 4:01 am, "inhahe" <inh... at gmail.com> wrote:
> Might have a stack overflow issue, if it retries too many times?

In which example? Neither of them is looping...


From paddy3118 at googlemail.com  Tue May 27 14:12:41 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 27 May 2008 11:12:41 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
	<7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>
	<31d9adb0-7a0e-4e02-bc22-f6e49c4f2d17@y22g2000prd.googlegroups.com> 
	<0e67df2c-43c1-4b1f-8220-52556a316595@79g2000hsk.googlegroups.com>
Message-ID: <6c0bfd20-6cdd-4e85-bbcc-b44e7cbf361c@56g2000hsm.googlegroups.com>

On May 27, 12:14 pm, Sverker Nilsson <s... at sncs.se> wrote:
> I had bothered. Volunterly that is too. Becausa I care.
>
> Should we piss of about py3k? It's a debate.
>
I suggest you try and drum up some support for your
position. If you don't get much, then maybe you should
reconsider your stance? And if you do, then you as a group
might find a more effective way to persuade others to
change.

- Paddy.




From catphive at catphive.net  Fri May  2 17:45:16 2008
From: catphive at catphive.net (Brendan Miller)
Date: Fri, 2 May 2008 14:45:16 -0700
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
	<mailman.477.1209757322.12834.python-list@python.org>
Message-ID: <11ltwu9nuoptc.78ifrzrehiy9.dlg@40tude.net>

On Fri, 02 May 2008 21:41:36 +0200, Christian Heimes wrote:

> Brendan Miller schrieb:
>> Hi,
>> 
>> I have functions that take a file object and write to it. In some cases I
>> just want to throw out what is written to that file object. I want
>> something like open('/dev/null', 'w'), but portable.
> 
> import os
> null = open(os.devnull, "wb")
> 
> :)
> 
> Christian

Awesome. Thanks.

Brendan


From daveparker at flamingthunder.com  Wed May 21 11:15:30 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 21 May 2008 08:15:30 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com>
Message-ID: <8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com>

> Or just:
>
> If command is "quit" ...

Hmmm.  In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
for assigning and checking types.  For example, to read data from a
file and check for errors:

     Read data from "input.txt".
     If data is an error then go to ...

Or when assigning a type to an identifier:

     HarmonicMean is a function(x, y) ...
     LoopCount is a variable ...

By using = only for equality and "is" only for types, the Flaming
Thunder compiler can detect when either is being used incorrectly
because the syntax for the two is incompatible.  That avoids the man-
years of wasted debugging time spent on languages that accept
statements that are easily confused, yet syntactically valid (e.g. the
confusion between = and == in C if-statments, or the confusion between
= (equality) and "is" (identity) in Python).

On May 20, 3:41?pm, MRAB <goo... at mrabarnett.plus.com> wrote:
> On May 20, 4:33 am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
>
>
> > On May 14, 7:59 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
> > > Would it be valid to say:
>
> > > x = "concrete"
>
> > > or to say:
>
> > > if command (is) set to "quit"
>
> > > ??????
>
> > I like the idea of:
>
> > If command is set to "quit" ...
>
> Or just:
>
> If command is "quit" ...
>
>
>
> > I've added it to my list of things to think about, and possibly
> > implement.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -



From gagsl-py2 at yahoo.com.ar  Fri May  9 10:02:20 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 11:02:20 -0300
Subject: Pythonwin
References: <b3b603df-d1a0-4c69-b1b5-177c392e87ca@a23g2000hsc.googlegroups.com>
	<11c8a80e-41bb-4cea-88d6-c9515e1a9d13@j22g2000hsf.googlegroups.com>
	<8afc345b-139d-4a98-bc29-cc71ef703d0a@e39g2000hsf.googlegroups.com>
Message-ID: <op.uav3x6upx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 09 May 2008 10:40:38 -0300, Clive_S <cliveswan at yahoo.co.uk> escribi?:

> I downloaded (from Python) and installed python-2.4.4.msi
>
> I have python and pythonw.exe in the Python 24 folder (but not in my
> start menu).
> When I click on the pythonw.exe it is not launched??

pythonw.exe is NOT PythonWin - it's a consoleless version of the standard Python interpreter.
PythonWin is part of the pywin32 package that you can download from https://sourceforge.net/projects/pywin32/ (make sure you get the right version)

-- 
Gabriel Genellina



From jon.kappes at gmail.com  Thu May 29 14:08:23 2008
From: jon.kappes at gmail.com (schweet1)
Date: Thu, 29 May 2008 11:08:23 -0700 (PDT)
Subject: Saving tif file from tricky webserver
Message-ID: <80a79cc0-2e80-4e7b-b4f3-58ab3be3035b@z16g2000prn.googlegroups.com>

Greetings,

I am attempting to automate accessing and saving a file (a TIF) from
the following URL:

http://patimg1.uspto.gov/.DImg?Docid=US007376435&PageNum=1&IDKey=E21184B8FAD5

I have tried some methods using urllib, httplib, and
web32com.client(InternetExplorer), but haven't been successful.
Currently I am using (in Python 2.5)

import webbrowser

url = [see above]

webbrowser.open(url, new=0, autoraise=0)

When this is run a windows popup dialog opens asking me to Open, Save,
or Cancel.  However, if I query multiple such URLs, I do not want to
have to respond manually.  Is there a way I can use Python to save the
TIF?


From h.goebel at goebel-consult.de  Sat May 17 07:51:59 2008
From: h.goebel at goebel-consult.de (Hartmut Goebel)
Date: Sat, 17 May 2008 13:51:59 +0200
Subject: Install man-pages with distutils/setuptools
Message-ID: <482ec6e0$0$6774$9b4e6d93@newsspool2.arcor-online.net>

Hi,

is there a standard way or a snippet for installing man-pages with

   python set.py install

when using distutils or setuptools? I have not found one when searching 
the web.

-- 
Sch?nen Gru? - Regards
Hartmut Goebel

Goebel Consult
Spezialist f?r IT-Sicherheit in komplexen Umgebungen
http://www.goebel-consult.de


From bj_666 at gmx.net  Fri May 30 02:10:06 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 30 May 2008 06:10:06 GMT
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
	<6a8o5pF34umpoU1@mid.individual.net>
	<13801bd3-50da-4773-a0aa-edcaf27e0c4d@34g2000hsf.googlegroups.com>
Message-ID: <6a9k1uF364dj7U2@mid.uni-berlin.de>

On Thu, 29 May 2008 15:41:29 -0700, Gandalf wrote:

> On May 30, 12:14 am, John Henderson <jhenRemoveT... at talk21.com> wrote:
>> Gandalf wrote:
>> > how do i write this code in order for python to understand it
>> > and print me the x variable
>>
>> > x=1
>> > def aaaa():
>> >     x++
>> >     if x > 1:
>> >         print "wrong"
>> >     else :
>> >         print x
>>
>> > aaaa()
>>
>> Example:
>>
>> x=1
>> def aaaa(x):
>>     x += 1
>>     if x > 1:
>>         return "wrong"
>>     else :
>>        return x
>>
>> print aaaa(x)
>>
>> John
> 
> mmm isn't their any global variable for functions?

There is but you shouldn't use global variables as they make program and
data flow harder to understand, the code more difficult to test, and
usually couples functions more tightly then they should.

Ciao,
	Marc 'BlackJack' Rintsch


From Lie.1296 at gmail.com  Sun May 18 04:57:26 2008
From: Lie.1296 at gmail.com (Lie)
Date: Sun, 18 May 2008 01:57:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<98fa5fa3-45ae-4df1-9fd3-1a227641244f@p25g2000hsf.googlegroups.com> 
	<5P6dnTMRFrUXL7LVnZ2dnUVZ_uSdnZ2d@earthlink.com>
Message-ID: <092bbffb-3325-45d4-9714-0dd1fba2ea82@k1g2000prb.googlegroups.com>

On May 18, 5:32 am, Vicent Giner <vgi... at gmail.com> wrote:
> Hello.
>
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
>
> However, it is usually said that Python is not a compiled but
> interpreted programming language ?I mean, it is not like C, in that
> sense.
>
> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
>
> The usual alternative is C, but I like Python more.
>
> The main drawbacks I see to using Python are these:
>
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

It is slower than a goodly written C code. C codes might be slower
than Python if the writer of C isn't very familiar with C, on the
other hand Python's implementation of things like list, dictionary,
sets, etc are a very optimized piece of code (some says it's the most
fine tuned implementation in the world) and a sloppily written array/
dict/sets implementation in C might be slower than Python.

> * I don't know how likely it is to find libraries in Python related to
> my research field.
>
> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Why not ask your peers? AFAIK (since I'm not a researcher, just a high-
school student with a "too much time" to program, I'm not even
familiar with Operation Research), in a Operation Research context (as
I understand it from wikipedia) the important thing is the algorithm
instead of pure speed, and codes are written just to describe the
algorithm you're devising. So any programming language that isn't an
esoteric language (like Whitespace or Brainfuck) would not be
considered a "just funny".

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...
>
> Thank you in advance.


On May 18, 11:37?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sat, 17 May 2008 20:25:18 -0700 (PDT), Henrique Dante de Almeida
> <hda... at gmail.com> declaimed the following in comp.lang.python:
> > ?My opinion: choose compiled or byte compiled languages. Choose the
> > language paradigm that best suit the algorithms.
>
> ? ? ? ? Python IS byte compiled -- that's what .pyc and .pyo files contain
> (strangely though, one must specify a command line argument to get the
> "optimized" .pyo, rather than the .pyc with debugging data embedded).

Just to note, currently, "optimized" python code (using -O or -OO)
does very little to make your code goes faster as it doesn't (yet) do
anything but removing docstrings. The -O(ptimized) flags is reserved
to make it possible to add optimizations that might make some features
unavailable or behave differently (such as the docstrings removal that
breaks codes that uses __doc__).


From fredbasset1000 at gmail.com  Mon May 19 18:33:15 2008
From: fredbasset1000 at gmail.com (fredbasset1000 at gmail.com)
Date: Mon, 19 May 2008 15:33:15 -0700 (PDT)
Subject: unittest, how to recursively run tests?
Message-ID: <08e8e41a-cb7e-45c4-a250-133826f02144@a9g2000prl.googlegroups.com>

Hi All,

Does anyone know of a good way to execute all unit tests present in a
project from the project root dir?
Ideally I'd like a mechanism that does not require the tests/files to
be manually listed in the source (e.g. via the suite mechanism).

Thanks all,
Fred


From wuwei23 at gmail.com  Wed May 21 22:41:17 2008
From: wuwei23 at gmail.com (alex23)
Date: Wed, 21 May 2008 19:41:17 -0700 (PDT)
Subject: extracting title and/or summary of a website
References: <538c89e3-606e-46cb-9f14-671b257e037f@z72g2000hsb.googlegroups.com>
Message-ID: <c0d0eb49-3381-4bc9-ba06-ea585d3b07f5@w4g2000prd.googlegroups.com>

On May 22, 3:28 am, ?????? ????? (ravinder thakur)
<ravindertha... at gmail.com> wrote:
> is there any lib in python that provides a mechanism to get the title
> of a web page ? also is there anything available to get a nice summary
> like the way google shows below every link ?

It's not part of the standard lib but I really like using
BeautifulSoup for this kind of thing:

    from urllib import urlopen
    from BeautifulSoup import BeautifulSoup

    html = urlopen("http://www.google.com").read()
    soup = BeautifulSoup(html)

    print soup.title # '<title>Google</title>'
    print soup.title.renderContents() # 'Google'

http://www.crummy.com/software/BeautifulSoup/

- alex23


From martindesalinas at gmail.com  Fri May 16 04:19:50 2008
From: martindesalinas at gmail.com (martindesalinas at gmail.com)
Date: Fri, 16 May 2008 01:19:50 -0700 (PDT)
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>
Message-ID: <5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>

look at

http://pypi.python.org/pypi?%3Aaction=search&term=dbf&submit=search

i use dbfpy


From larry.bates at websafe.com`  Fri May  2 15:23:41 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 02 May 2008 14:23:41 -0500
Subject: Searching and replacing text ?
In-Reply-To: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
Message-ID: <yKGdnfugFprY94bVnZ2dnUVZ_qelnZ2d@comcast.com>

Oltmans wrote:
> Hi,
> 
> I'm new to Python (and admittedly not a very good programmer) and I've
> come across a scenario where I've to search and replace text in a
> file.
> 
> For the sake of an example, I'm searching for every occurence of the
> text
> [[http://www.hotmail.com -> Hotmail]]
> 
> I've to replace it with
> [http://www.hotmail.com Hotmail]
> 
> I've come up with following scheme
> p=re.compile(r'\[\[')
> q=re.compile(r'->')
> 
> p.sub('[',txt)
> q.sub('\b',txt)
> 
> Give that I don't have very strong RegEX background, this doesn't look
> very elegant. Is there some other way I can accomplish the same thing?
> Moreover, please note that I'm using 'p' and 'q' for two regex and
> then calling 'sub()' on both p and q. Can't I just do that by
> employing one RegEx and then calling sub() only once?
> 
> Please enlighten me. Thanks in advance.
> 

If you really want to replace EVERY occurrence, no regexes are needed.
I'd do something like (not tested):

fp=open(inputfilename, 'r')
contents=fp.read()
fp.close()
parts=contents.split('[[http://www.hotmail.com -> Hotmail]]')
newcontents='[http://www.hotmail.com Hotmail]'.join(parts)
fp=open(outputfilename, 'w')
fp.write(newcontents)
fp.close()

-Larry


From exarkun at divmod.com  Tue May 13 17:25:39 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 13 May 2008 17:25:39 -0400
Subject: asynchat sends data on async_chat.push and .push_with_producer
In-Reply-To: <2567d557-b5cd-4b12-ad09-67f30ce1078d@b1g2000hsg.googlegroups.com>
Message-ID: <20080513212539.6859.543655387.divmod.quotient.63065@ohm>

On Tue, 13 May 2008 14:05:43 -0700 (PDT), Giampaolo Rodola' <gnewsg at gmail.com> wrote:
>On 13 Mag, 22:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Tue, 13 May 2008 11:50:30 -0700 (PDT), Giampaolo Rodola' <gne... at gmail.com> wrote:
>> >On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:
>>
>> >> We do not live in a pure world, Python isn't pure (practicality beats
>> >> purity), and by attempting to send some data each time a .push*()
>> >> method is called, there are measurable increases in transfer rates.
>>
>> >Good point. I'd like to ask a question: if we'd have a default
>> >asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
>> >such problem?
>> >I've always found weird that asyncore has such an high default timeout
>> >value.
>> >Twisted, for example, uses a default of 0.01 ms for all its reactors.
>>
>> I'm not sure this is right.  What timeout are we talking about?  Twisted
>> only wakes up when necessary.
>>
>> Jean-Paul
>
>I'm talking about the asyncore.loop timeout parameter which defaults
>to 30 (seconds).
>I don't think that Twisted only wakes up when necessary (surely not by
>using the select reactor).
>Think about the schedule calls feature (reactor.callLater).
>To have that work I guess that a continuous loop must always be kept
>alive, regardless of the reactor used.

To support scheduling calls, you just have to know when the next call is
going to happen.  Then, you can wake up at exactly that time.  This is
what Twisted does, even for select reactor. ;)

An exception to this is that on Windows, in order to support ^C, the
reactor will wake up more often, because ^C does not interrupt select()
in Python on Windows (although this could probably be fixed).

Jean-Paul


From gagsl-py2 at yahoo.com.ar  Wed May 14 03:26:30 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 May 2008 04:26:30 -0300
Subject: portable way to tell what Popen will call
References: <d4rzzf2s5t1x$.15dkl507fpi3x.dlg@40tude.net>
Message-ID: <op.ua4uygcax6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 23:14:56 -0300, Brendan Miller <catphive at catphive.net>  
escribi?:

> I need a portable way to tell what subprocess.Popen will call.
>
> For instance on unix systems, Popen will work for files flagged with the
> executable bit, whereas on windows Popen will work on files ending the in
> .exe extension (and I don't think anything else). Is there a portable way
> to check what Popen will work on without actually execute it? Do I have  
> to
> write a bunch of platform specific code here?

On Windows, for a quick and dirty answer, include: *.exe,*.cmd,*.bat,*.com

 From the documentation of CreateProcess (Windows), used internally by  
subprocess:
<http://msdn.microsoft.com/en-us/library/ms682425(VS.85).aspx>
Apart from .exe files (PE) - DOS programs (.com and .exe) and 16 bits  
Windows executables (NE) are valid if the appropriate subsystem is enabled.
.bat and .cmd scripts are supported too, altough this isn't explicitely  
menctioned in the docs.
The different executable formats are identified by signature, not  
extension. You can rename foo.exe as foo.xxx and it will be valid still.  
Only for .exe, you can leave out the extension (but CreateProcess does  
*not* use the PATHEXT environment variable; you can't leave out the .cmd  
extension by example).

Even if you filter out things, you have to handle exceptions in Popen. A  
jpeg image with the executable bit set won't be accepted on Unix-like  
systems.

-- 
Gabriel Genellina



From martin.nkm at googlemail.com  Fri May 30 11:33:09 2008
From: martin.nkm at googlemail.com (martin.nkm at googlemail.com)
Date: Fri, 30 May 2008 08:33:09 -0700 (PDT)
Subject: running on WinPC + comunication via USB
Message-ID: <746283b7-5ce8-47ba-aff9-47fe197762fb@e53g2000hsa.googlegroups.com>

Hello, I have two questions.
1/ If I want to use Python and let my WinPC communicate via RS-232
with external embedded computer I know there is a pyserial module,
which I can use it. But what will happen if I want to replace RS-232
by USB? I know I can have virtual COM port, but all the configuration
parameters basically refer to RS-232 parameters - baudrate, bits,
stopbits, parity. In case of USB that's a nonsense I think. Does
anybody know?
2/ Second is a basic question. Do I need also cygwin running on my
Windows PC to get running Python scripts? Or is that Python
interpreter (Win executable) self efficient? Thanks.


From exarkun at divmod.com  Fri May  2 10:48:18 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 2 May 2008 10:48:18 -0400
Subject: portable fork+exec/spawn
In-Reply-To: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>
Message-ID: <20080502144818.6859.2051253710.divmod.quotient.58131@ohm>

On Fri, 02 May 2008 06:30:03 -0500, Nick Craig-Wood <nick at craig-wood.com> wrote:
>Brendan Miller <catphive at catphive.net> wrote:
>>  On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:
>>
>> > URL:http://docs.python.org/lib/module-subprocess.html
>>
>>  Awesome. This is exactly what I was hoping existed.
>
>subprocess works well for spawn process, send input, receive output,
>read exit code type jobs.
>
>For jobs which require interactivity ie send input, receive output,
>send input, receive output, ... it doesn't work well.  There isn't a
>good cross platform solution for this yet.  pyexpect works well under
>unix and is hopefully being ported to windows soon.

I haven't read all of this thread, so excuse me if this is out of place.

There is a good cross-platform solution, in fact.  It's Twisted's
spawnProcess API, which works on POSIX and Windows, supports supports
sending and receiving, and doesn't have deadlock issues since it's
event-driven.

Jean-Paul


From hdante at gmail.com  Mon May 19 20:42:26 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Mon, 19 May 2008 17:42:26 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
	<ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>
Message-ID: <0154f57e-8d35-4656-a3b9-ca506307c1da@i76g2000hsf.googlegroups.com>

On May 19, 3:07?pm, Vicent Giner <vgi... at gmail.com> wrote:
>
> Yes, of course, but that should mean that I have to do it better, in
> the programming step (I would have to re-program or re-implement my
> algorithm). And I think the problem would be the same in any other
> language, wouldn't it?

 The idea is that a C version of the same program could take, eg. 0,4
hours. But I think we have an authoritative answer here, see Robin
Becker's post (even though he programmed the problem, not the
algorithm). :-)

> Are there such toolkits in other languages? I am not sure they exist
> in C, for example.

 I'm sure there are a lot of toolkits for linear programming (can't
tell about other solvers). glpk is the GNU implementation. It even has
its own built-in language (Mathprog). Someone posted an interesting
link of a python wrapper: "OpenOpt"

 http://scipy.org/scipy/scikits/wiki/OpenOpt

 It supports many solvers. It may be interesting for you, since there
are some non-linear and "global" problem solvers:

 http://scipy.org/scipy/scikits/wiki/OOClasses

> By the way, is it possible (and easy) to call a C function from a
> Python program??

 Yes. The easiest way I know of is using SWIG. People will recommend
you Cython too.


From inhahe at gmail.com  Thu May 22 20:39:39 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:39:39 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
Message-ID: <4moZj.13958$hv2.3334@bignews5.bellsouth.net>

>> 1
>> 2

actually, you don't want it to print 3 also?  if not, then you would do 
f(*map(kwargs.get, inspect.getargspec(f)[0])+args[:1])

> import inspect
> f(*map(kwargs.get, inspect.getargspec(f)[0])+args)
>




From s0suk3 at gmail.com  Thu May 15 17:26:22 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 15 May 2008 14:26:22 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
References: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>
Message-ID: <a69110e5-e622-4963-9816-2cc6730090e5@m44g2000hsc.googlegroups.com>

On May 15, 3:12 pm, RossGK <ros... at gmail.com> wrote:
> Just getting used to the PyDev environment in eclipse by playing with
> a few simple programs. I'm also using wxPython GUI stuff.
>
>  I've noticed though that simple print commands in my code cause a
> "wxPython:stdout/stderr" popup window to display any print's I might
> be dumping out, rather than going to the console in Eclipse.
>
> Any suggestions of why this is?   Another code example I was looking
> at (which does not include any wx GUI stuff) has print commands whose
> result ends up in the Eclipse console, just to further confuse me.
>
> Is this something that wxPython is imposing on the environment?

Yes, it's wxPython, it does that by default. Pass the keyword argument
"redirect" set to False to your wx.App object constructor:

app = wx.App(redirect=False)

Or to whatever class you derived from wx.App:

app = ClassDerivingFromWxApp(redirect=False)


From wuwei23 at gmail.com  Thu May 22 23:56:13 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 20:56:13 -0700 (PDT)
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
Message-ID: <b6d0d781-e370-4db6-9d05-0ec0ae79500d@x19g2000prg.googlegroups.com>

On May 23, 1:37 pm, John Salerno <johnj... at gmailNOSPAM.com> wrote:
> Basically, the question is this: can you write the logic behind a
> program (whether it be a game, an email client, a text editor, etc.)
> without having any idea of how you will implement the GUI?

Hey John,

Are you familiar with the Model-View-Controller pattern? It
specifically addresses this issue, and is very common in game
development.

In your example of a grid-based game like chess, the board & the
pieces would all be defined in the Model. The board may be a 2D array,
so to move a piece, the piece only has to know how to address
locations within the array, or even better, only has to know how to
tell the board where it's moving to, so the pieces don't have to know
how the board is implemented.

The View interprets & displays the Model. You could represent each
square by a bitmap, draw a 3d object, or use ASCII etc etc.

The Controller maps user input to Model behaviour, so pressing 'up'
while a piece is highlighted may call something like
piece.move_north(), which updates the necessary entities in the Model
to reflect the move. It generally also passes information from the
Model to the View, although it's not uncommon for the View to just
refer to the Model separately.

So you can think of the Model as a simulation of the behaviour you
want, while the View is _a_ representation of that simulation. The
simulation doesn't care if you're displaying it in 2D or 3D, it cares
about pieces and board positions. By separating the Model & the View,
you also allow for multiple representations of the same data, such as
having a 2D overhead map and a 3D visualisation of the same
information.

- alex23


From george.sakkis at gmail.com  Mon May 26 18:21:07 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 15:21:07 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com> 
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com> 
	<mailman.1617.1211818106.12834.python-list@python.org>
	<039f3c2d-4ebb-4412-9cbf-458afa412c4e@i36g2000prf.googlegroups.com>
Message-ID: <da57f3d3-2245-4dbc-b218-2a52233101b5@z72g2000hsb.googlegroups.com>

On May 26, 4:02?pm, "Russ P." <Russ.Paie... at gmail.com> wrote:

> Here's another suggestion. Why not use "priv" as shorthand for
> "private"? Then,
>
> priv height = 24
>
> at file scope would make "height" invisible outside the module by
> default. And the same line in a class definition would give "height"
> the equivalent of "protected" status in C++.

On a slightly different question: can a data hiding mechanism be
implemented as an add-on by a third party library without a change in
the core language, just like zope.interface does for interfaces ? If
not, why not ?

> I think "height" looks cleaner than "_height". And isn't clean code a
> fundamental aspect of Python?

Note that even in languages that do implement data hiding, people
often use a naming convention to denote hidden members, e.g. an "m_"
prefix (though I find this uglier than plain underscores).

George


From lists at cheimes.de  Mon May 19 17:04:56 2008
From: lists at cheimes.de (Christian Heimes)
Date: Mon, 19 May 2008 23:04:56 +0200
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
In-Reply-To: <200805191629.38919.kyrie@uh.cu>
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
	<200805191629.38919.kyrie@uh.cu>
Message-ID: <g0sq1p$9p5$1@ger.gmane.org>

Luis Zarrabeitia schrieb:
> Personally, I like to use "is" with singletons. I find it easier to type and 
> read "if param is None" than "if param == None", but some python developers 
> dislike the first one because of the "dark magic" involved in knowing that 
> None is a singleton.

Testing for None is the only common case where you should *not* use ==
comparison. If you want to check if something is None then do "if
something is None". Easy, isn't it? :]

Look, what Python does for the various way (simplified):

"if a == None:" -> "if a.__cmp__(None)"

"if a is None" -> "if id(a) == id(None)"

"if a:" -> "if a.__nonzero__()" / "if a.__len__()"

Christian



From larudwer at freenet.de  Sat May 17 06:08:51 2008
From: larudwer at freenet.de (Ruediger)
Date: Sat, 17 May 2008 12:08:51 +0200
Subject: [x for x in <> while <>]?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
Message-ID: <g0mab2$pkt$1@aioe.org>

urikaluzhny wrote:

> It seems that I rather frequently need a list or iterator of the form
> [x for x in <> while <>]
> And there is no one like this.
> May be there is another short way to write it (not as a loop). Is
> there?
> Thanks

I usually have the same problem and i came up with an solution like that:

from operator import ne
def test(iterable, value, op=ne):
    _n = iter(iterable).next
    while True:
        _x = _n()
        if op(_x, value):
            yield _x
        else:
            raise StopIteration

l = range(6)
print [x for x in test(l, 4)]

r at linux:~/tmp> python test18.py
[0, 1, 2, 3]



From martin at v.loewis.de  Fri May  2 13:50:39 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 May 2008 19:50:39 +0200
Subject: Preventing 'bad' filenames from raising errors in os.path
In-Reply-To: <31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>
References: <mailman.465.1209746433.12834.python-list@python.org>
	<31980dcf-871f-43d7-bc12-52efb081779a@d19g2000prm.googlegroups.com>
Message-ID: <481B546F.7010609@v.loewis.de>

> Now, I can understand if you don't like the "WindowsError" as that is
> obviously platform specific. The try/except pattern however is the way
> errors are handled in python and the best and most appropriate way to
> deal with it. The above example just shows that at the very least
> there isn't a significant difference in code size between the two
> methods.
> 
> I don't know what the equivalent error is called in *nix but assume it
> is PosixError (it isn't)

The common base class to use here is actually OSError. WindowsError is
a subclass thereof.

Regards,
Martin


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:48:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:48:38 +0200
Subject: python newbie: some surprises
In-Reply-To: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
Message-ID: <48240fe6$0$5108$426a34cc@news.free.fr>

v4vijayakumar a ?crit :
> When I started coding in python, these two things surprised me.
> 
> 1. my code is inconsistently indented with the combination of tabs and
> spaces. Even lines looked intended, but it is not.

Then you have a problem with your code editor - not with Python.

> 2. python requires to pass "self" to all instance methods

Nope. Python requires that function used as instance methods take the 
instance as first argument (and that functions used as classmethods take 
the class as first argument). It's the method object's duty to actually 
pass the appropriate object to the function. The rational is that it 
allows to built methods above two more generic constructs (namely: 
functions and the descriptor protocol) instead of having to special-case 
them.

> and I missed ":" often. :)

Your editor should not indent the next line then. Either you failed to 
correctly configure your editor, or it's broken.


From cokofreedom at gmail.com  Wed May  7 10:18:53 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 7 May 2008 07:18:53 -0700 (PDT)
Subject: What is the purpose of ptyhon in Windows
References: <c7b1ffbb-25af-4468-8ea0-c29c158ecdbf@x35g2000hsb.googlegroups.com>
Message-ID: <cf4c2c27-3e80-4059-bf1e-8b395bbf7410@a70g2000hsh.googlegroups.com>

On May 7, 4:08 pm, "parag_p... at hotmail.com" <parag_p... at hotmail.com>
wrote:
> hi All,
> I have no idea why I need to learn a new scripting language,
> nothing much to the sytnax,
> I need to understand what could be the prupose of another scripting
> language
>
> Cna you please help me with this,
> Is there a possibilty to work on bigger projects with Python

Answer, reasons to learn another scripting language;
It provides different techniques to problems,
It is eaiser and clearer to write with a strong community to aid
developers,
Problems can be scaled,
There are a lot of high scale Python projects.

Hope that helped.


From castironpi at gmail.com  Thu May 15 10:12:52 2008
From: castironpi at gmail.com (castironpi)
Date: Thu, 15 May 2008 07:12:52 -0700 (PDT)
Subject: send yield
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
	<482c42d9$0$9669$426a34cc@news.free.fr>
	<1fc6c5b4-f4e6-4a1c-8ab0-b07d7f269a66@l42g2000hsc.googlegroups.com>
Message-ID: <ce8db71f-033c-476b-83f7-ac194a01cdd6@m45g2000hsb.googlegroups.com>

On May 15, 9:07?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 9:04?am, Bruno Desthuilliers <bruno.
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > castironpi a ?crit :
>
> > > Why can't I write this?
>
> > Because one or more of the "t", "h", "i", "s" keys are missing from your
> > keyboard ?
>
> No; they're all here.

I have

	life1= Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )


From tjreedy at udel.edu  Thu May  1 18:37:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 18:37:55 -0400
Subject: dropping win98 support? was Re: Python 2.6 and wrapping C
	libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92><mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
	<9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>
	<mailman.405.1209643816.12834.python-list@python.org>
	<372ae26a-d772-4182-aa4b-64330626d60f@l25g2000prd.googlegroups.com>
Message-ID: <fvdgnv$ad0$1@ger.gmane.org>


"illume" <renesd at gmail.com> wrote in message 
news:372ae26a-d772-4182-aa4b-64330626d60f at l25g2000prd.googlegroups.com...
| Ah, why is that?

Were any of the reasons given in
http://www.python.org/dev/peps/pep-0011/
unclear?
It appears you are already aware of MS's non-support of Win98

| Seems like a lot of people using it, so it's still worthwhile making
| 2.6 work with win98.

Since the warning was given in 2.5, no one has agreed enough to volunteer 
to do do.





From sjmachin at lexicon.net  Tue May 13 18:31:04 2008
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 13 May 2008 22:31:04 GMT
Subject: help with file path exceeding 255 characters
In-Reply-To: <4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
	<482a0a52@news.mel.dft.com.au>
	<4c4bce8e-d4b6-41ca-9a5c-ed2504a0c883@27g2000hsf.googlegroups.com>
Message-ID: <482a16a5@news.mel.dft.com.au>

yguan08 at gmail.com wrote:
> On May 13, 4:38 pm, John Machin <sjmac... at lexicon.net> wrote:
>> ygua... at gmail.com wrote:
>>> I have trouble of obtaining the file size of a file because the
>>> fullpath exceeds 255 characters. I get this message with
>> At the DOS command level, you can do
>>      subst x: very\long\path
>> and then refer to
>>      x:filestem.ext
>> where x is any unused drive letter.
> Good idea. But subst does not see to work with path that has spaces.
> It gives "Incorrect number of parameters"

If any DOS command-line argument includes spaces, you need to quote it.

os.system(r'subst x: "c:\my big fat path\rab oof\etc etc etc"')



From Avowkind at gmail.com  Sun May 18 23:41:11 2008
From: Avowkind at gmail.com (Avowkind)
Date: Sun, 18 May 2008 20:41:11 -0700 (PDT)
Subject: handling xml embedded within xml
Message-ID: <942b091f-48fb-4de1-98f4-5593ecd89864@d19g2000prm.googlegroups.com>

I have a log file within which is contained a dump of an xml message

... rubbish
///asd laksj aslf
<nif_DEBUG time="Fri, 16 May 2008 13:40:17, 330">
<?xml version="1.0" encoding="UTF-8"?>
<ns>
    <PDQ Lang="fr-FR" ID="XM;1928">content</PDQ>
</ns>
</nif_DEBUG>
.. more junk
... then more xml
""")
This example is of course a summary.

I want to write a streaming filter which will throw out all the junk
and just return a series of nice strings of each complete xml
message.  Ideally I also want to filter which messages I am interested
in.

e.g. the output from the above would be
<?xml version="1.0" encoding="UTF-8"?>
<ns>
    <PDQ Lang="fr-FR" ID="XM;1928">content</PDQ>
</ns>

Two problems.
1. clearing away junk that is nothing like XML.
2. handling the <? xml declaration that lies inside the other xml
tags.

the first I can handle relatively simply by reading through the string
until I get what looks like a valid XML tag.  I can then pass the rest
onto an xml parser like xml.sax. However the parser then excepts out
with :
XMLSyntaxError: XML declaration allowed only at the start of the
document

I would like a more forgiving parser that handles bad xml by a call
back that I can just say carry on to.
Bear in mind also I probably will not have the end of the stream while
initially processing.

All suggestions and pointers welcome
Andrew




From bj_666 at gmx.net  Tue May 20 02:55:19 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 06:55:19 GMT
Subject: Compress a string
References: <mailman.1315.1211133997.12834.python-list@python.org>
	<20080520000914.24b6c12e.johnjsal@NOSPAMgmail.com>
	<20080520003857.b1823ec1.johnjsal@NOSPAMgmail.com>
Message-ID: <69faunF2uih6aU4@mid.uni-berlin.de>

On Tue, 20 May 2008 00:38:57 -0400, John Salerno wrote:

> def compress(s):
>     new = []
> 
>     for c in s:
>         if c not in new:
>             new.append(c)
>     return ''.join(new)
> 
> 
> No, wait! I can do better!
> 
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new] return ''.join(new)
> 
> Wow, list comprehensions are cool.

And it's a misuse of list comprehension here IMHO because they are meant to
build lists, not to cram a ``for``/``if`` loop into a one liner.  You are
building a list full of `None` objects, just to throw it away.

Ciao,
	Marc 'BlackJack' Rintsch


From jr9445 at ATT.COM  Thu May 15 12:21:16 2008
From: jr9445 at ATT.COM (Reedick, Andrew)
Date: Thu, 15 May 2008 11:21:16 -0500
Subject: exists=false, but no complaint when i open it!?
In-Reply-To: <A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
References: <285e0ce6-1371-4ab7-9281-ad1d664a480f@a23g2000hsc.googlegroups.com>
	<A20311AF91C11640ACBB721DC2558B4908E6A1BE@brexc51p>
Message-ID: <A20311AF91C11640ACBB721DC2558B4908E6A1C3@brexc51p>



> -----Original Message-----
> From: python-list-bounces+jr9445=att.com at python.org [mailto:python-
> list-bounces+jr9445=att.com at python.org] On Behalf Of Reedick, Andrew
> Sent: Thursday, May 15, 2008 12:11 PM
> To: globalrev; python-list at python.org
> Subject: RE: exists=false, but no complaint when i open it!?
> 
> >
> > print os.path.exists('C:\Users\saftarn\Desktop\NetFlixDataSet
> > \trainingsetunzipped\training_set\mv_0000001.txt')
> >
> 
> 
> You're falling victim to string interpolation because of the
> backslashes.  (\n == newline, \N == N).
> 
> Try using a raw string r'filename', instead of 'filename':
> 	print
>
os.path.exists(r'C:\Users\saftarn\Desktop\NetFlixDataSet\trainingsetunz
> i
> pped\training_set\mv_0000001.txt')
> 
> 

Specificially, the \t in '\trainingsetunzipped' and in '\training_set'
were being treated as tab characters.  Ignore my comment about '\N ==
N'.


From sn at sncs.se  Tue May 27 03:47:52 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 00:47:52 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
References: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>
	<ac9f0838-475b-414d-83bf-99321719ebcf@f36g2000hsa.googlegroups.com> 
	<248a2c45-caae-49bb-b8ff-701af8b86207@p25g2000hsf.googlegroups.com> 
	<mailman.1594.1211780280.12834.python-list@python.org>
	<f84878e1-3db8-49f3-9f04-d7a257a17607@p25g2000hsf.googlegroups.com>
	<rgfqg5-dg1.ln1@satorlaser.homedns.org>
Message-ID: <7927276a-6d1a-4c33-a918-aaa47b1dd32f@e53g2000hsa.googlegroups.com>

print a statement

let's make it import() if() (C freaks) except() else() what else()

It was just convenient to not have to write those parenthesis

I agree with the OP, of course if you wrote my post after I began look
into this

Parentheses for the people..

I mean, it's not that.... making it a function?

Well I'd have suggested, make a function and call it write()

The name print is a misnormer any case

So it keeps a misleading name and make it a function, thinks it is a
cleanup

Just Add a write() builtin function so can we use that if we want a
function

but keep the print statement, the import statement, the if statement,
the for statement...

Dont make they functions. Or is this just to throw us out?

S...


On May 26, 12:20 pm, Ulrich Eckhardt <eckha... at satorlaser.com> wrote:
> Prisoner at War wrote:
> > On May 26, 1:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>
> >> The differences aren't so fundamental or important: it's not an entirely
> >> new language, just some ugly old things are being removed or changed in
> >> incompatible ways (at *some* time it was supposed to happen - but could
> >> not happen on the 2.x series which has to remain backwards compatible)
> >> Also, Python 3.0 will be released simultaneously with 2.6, and there will
> >> be other 2.x releases. Python 2 won't magically disappear from Earth, I
> >> don't think Linux distros will come with Python 3.0 by default anytime
> >> soon (perhaps not before 3.1).
>
> > But I'd read that Python 3 is very different in many important ways.
>
> Yes, and that is the reason it is version 3.x instead of another 2.x. Moving
> to version 3 signals that some changes were done that are _not_ backward
> compatible and not even intended to.
>
> > I read it right there on the Py3K site!  I can't make sense of how,
> > why, even what, exactly, but that's not a misimpression on my part,
> > I certain nonetheless...it's not just cosmetic changes but important
> > ones pertaining to a sort of "linguistic logic" I gather....
>
> Well, cosmetic or important is always in the eye of the beholder. I
> personally would say that they are important cosmetic changes. You don't
> get any new features or a more Touring-complete language suddenly, but it
> will be much more consistent because it doesn't have to maintain wrong
> decisions of the past, like making 'print' a separate statement when a
> function would do.
>
> >> So learning Python with a book targeted to 2.5 isn't a waste of time -
> >> not at all.
>
> > Well, I will be learning Python from the excellent materials available
> > online, to be sure, but a book that I spend money for, well, I have
> > "higher standards" for it, you know, one of which is that it doesn't
> > get superseded so soon!
>
> As already pointed out, Python 2 will not suddenly cease to exist and
> knowledge about it won't suddenly be worthless either. I guess it will take
> a few years until the use of Python 3 supercedes that of Python 2.
>
> Uli
>
> --
> Sator Laser GmbH
> Gesch?ftsf?hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932



From http  Fri May  9 05:48:21 2008
From: http (Paul Rubin)
Date: 09 May 2008 02:48:21 -0700
Subject: Grabbing previous iteration in a dict
References: <25657e4e-45c2-4a1f-948d-26ac64a75cd7@u6g2000prc.googlegroups.com>
Message-ID: <7xabizkdui.fsf@ruckus.brouhaha.com>

dannywebster at googlemail.com writes:
> I have a dictionary of which i'm itervalues'ing through, and i'll be
> performing some logic on a particular iteration when a condition is
> met with trusty .startswith('foo').  I need to grab the previous
> iteration if this condition is met.  I can do something with an extra
> var to hold every iteration while iterating, but this is hacky and not
> elegant.

You cannot rely on the elements of a dictionary being in any
particular order (dicts are internally hash tables), so the above
is almost certainly ont what you want.


From sebey at mac.com  Thu May 29 09:46:09 2008
From: sebey at mac.com (sebey)
Date: Thu, 29 May 2008 06:46:09 -0700 (PDT)
Subject: feedparser html sanitizion how-to disable it
Message-ID: <c7a6a23f-9fcf-4add-9e2e-9202f2895932@25g2000hsx.googlegroups.com>

ok so I know about why its good but I am building a website that
imports rss feeds form external place in this case Talkshoe.com and
feedparser seens to think that podcast.feed.description has html in it
and same with podcast.entries[0].description so how can I disable it

p.s. new to python so baby speak would be greatly appercated thank
you


From mattheww at chiark.greenend.org.uk  Thu May 22 17:14:44 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 22 May 2008 22:14:44 +0100 (BST)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
	<c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>
Message-ID: <8Ot*rIxds@news.chiark.greenend.org.uk>

<s0suk3 at gmail.com> wrote:
> So it seems like you're designing a language for non-programmers.
> That's good, I've never heard about anyone so interested in teaching
> programming for kids and non-programmers. But in that case, you
> shouldn't even be comparing it to Python.

At one time, Guido was very keen on the idea of Python as a language to
introduce non-programmers to (under the 'Computer Programming for
Everybody' slogan).

I think it's rather a shame that this has more-or-less fallen by the
wayside. There are lots of people out there producing buggy
spreadsheets to do things that would be easier to do in a programming
language.

-M-


From squareswallower at yahoo.com  Mon May  5 23:02:06 2008
From: squareswallower at yahoo.com (dave)
Date: Mon, 5 May 2008 21:02:06 -0600
Subject: word shifts
References: <fvjgsj$4j2$1@news.xmission.com> <m2myn6lf2n.fsf@googlemail.com>
Message-ID: <fvohne$m0f$1@news.xmission.com>

On 2008-05-04 01:10:40 -0600, Arnaud Delobelle <arnodel at googlemail.com> said:

> dave <squareswallower at invalid.com> writes:
> 
>> Hello,
>> 
>> I made a function that takes a word list (one word per line, text
>> file) and searches for all the words in the list that are 'shifts' of
>> eachother.  'abc' shifted 1 is 'bcd'
>> 
>> Please take a look and tell me if this is a viable solution.
>> 
>> def shift(word, amt):
>> 	ans = ''
>> 	for letter in word:
>> 		ans = ans + chr((ord(letter) - ord('a') + amt) % 26 + ord('a'))
>> 	return ans
> 
> In Python, if you want to build a string from lots of parts you can
> use ''.join(parts).  I think it is considered more efficient.


what would be the best way to write a "ans = ans + chr" into a 
''.join(parts) ??




From waldemar.osuch at gmail.com  Sat May  3 15:07:21 2008
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: Sat, 03 May 2008 19:07:21 GMT
Subject: Python and SOAP status
In-Reply-To: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
References: <L9idnZfWDafH84bVnZ2dnUVZ_tidnZ2d@comcast.com>
Message-ID: <JJ2Tj.111566$rd2.71630@pd7urf3no>

Heikki Toivonen wrote:
> I have started researching the Python SOAP (and web services in general)
> options out there. Python 2.5 should be supported.
> 
> I used Python for some web services stuff (demo quality) a few years
> back without major problems. However, it seems many of the libraries I
> remember from that time have become dormant or have been explicitly
> discontinued. A colleague also commented that he run into lots of
> problems trying to use Python for SOAP a year ago.
> 
> What is your experience with Python SOAP, WSDL etc. libraries? What are
> the good, maintained options out there right now? How is standards
> compliance, how robust are the libraries, how do they interoperate with
> other libraries written in other languages (I am especially interested
> in interoperability with Java and PHP web services stacks).
> 
> It seems like the top 3 candidates on my list are ZSI
> (http://pywebsvcs.sourceforge.net/), soaplib
> (http://trac.optio.webfactional.com/) and suds
> (http://trac.optio.webfactional.com/). If you have any experience in
> using these, I'd very much like to hear from you.
> 
> There was quite a depressing post about ZSI's status at
> http://www.kunxi.org/archives/2008/01/pythonsoap-second-encounter/.
> 

I had good experience using soaplib as the server and Java client.

For the client side I found elementsoap (http://effbot.org/downloads/)
to be useful on a couple occasions.

Waldemar


From jamesd at echeque.com  Mon May 19 20:47:50 2008
From: jamesd at echeque.com (James A. Donald)
Date: Tue, 20 May 2008 10:47:50 +1000
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
Message-ID: <j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>

I am just getting into python, and know little about it, and am
posting to ask on what beaches the salt water crocodiles hang out.

1.  Looks to me that python will not scale to very large programs,
partly because of the lack of static typing, but mostly because there
is no distinction between creating a new variable and utilizing an
existing variable, so the interpreter fails to catch typos and name
collisions.  I am inclined to suspect that when a successful small
python program turns into a large python program, it rapidly reaches
ninety percent complete, and remains ninety percent complete forever.

2.  It is not clear to me how a python web application scales.  Python
is inherently single threaded, so one will need lots of python
processes on lots of computers, with the database software handling
parallel accesses to the same or related data.  One could organize it
as one python program for each url, and one python process for each
http request, but that involves a lot of overhead starting up and
shutting down python processes.  Or one could organize it as one
python program for each url, but if one gets a lot of http requests
for one url, a small number of python processes will each sequentially
handle a large number of those requests.  What I am really asking is:
Are there python web frameworks that scale with hardware and how do
they handle scaling?

Please don't read this as "Python sucks, everyone should program in
machine language expressed as binary numbers".  I am just asking where
the problems are.
--
  ----------------------
We have the right to defend ourselves and our property, because 
of the kind of animals that we are. True law derives from this 
right, not from the arbitrary power of the omnipotent state.

http://www.jim.com/      James A. Donald


From nayden at gmail.com  Fri May 23 17:14:27 2008
From: nayden at gmail.com (nayden)
Date: Fri, 23 May 2008 14:14:27 -0700 (PDT)
Subject: Storing objects in relational database
References: <aa8c2a31-dec8-4810-b0c2-e4cbc0f76766@a70g2000hsh.googlegroups.com>
Message-ID: <03a17198-3eb2-438e-97c9-db18c0c24a80@c65g2000hsa.googlegroups.com>

and then I try to restore the object with the following code

def success(rv):
    print "success"
    str =  cStringIO.StringIO(libpq.PgUnQuoteBytea(rv[0][0]))
    i = cPickle.load(str)
    i.toString()

the execution fails just after the print statement, and I am not quite
sure why is that.

I would love to find out what people are using when they need to do
something similar --
perhaps I am trying to do it the perl way, while there is an elegant
python solution.

thanks


From sjdevnull at yahoo.com  Fri May 16 13:59:52 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Fri, 16 May 2008 10:59:52 -0700 (PDT)
Subject: writing python extensions in assembly
References: <dCgXj.4831$Kk3.3347@bignews9.bellsouth.net><mailman.1229.1210949533.12834.python-list@python.org><wChXj.4859$Kk3.3020@bignews9.bellsouth.net>
	<mailman.1232.1210952591.12834.python-list@python.org>
	<kxiXj.4888$Kk3.416@bignews9.bellsouth.net>
Message-ID: <2e4d8e9c-7c10-4567-b4cf-d0d7aca2e62f@c65g2000hsa.googlegroups.com>

On May 16, 12:24 pm, "inhahe" <inh... at gmail.com> wrote:
> "D'Arcy J.M. Cain" <da... at druid.net> wrote in messagenews:mailman.1232.1210952591.12834.python-list at python.org...
>
>
>
> > 2. Once the code is functioning, benchmark it and find the
> > bottlenecks.  Replace the problem methods with a C extension.  Refactor
> > (and check your unit tests again) if needed to break out the problem
> > areas into as small a piece as possible.
>
> There's probably only 2 or 3 basic algorithms that will need to have all
> that speed.
>
>
>
> > 3.  If it is still slow, embed some assembler where it is slowing down.
>
> I won't know if the assembler is faster until I embed it, and if I'm going
> to do that I might as well use it.

You won't know if the C is faster than the assembly until you write
it, and if you're going to do that you might as well use it...

If the C is fast enough, there's no point in wasting time writing the
assembly.

(Also FWIW C and C++ are different languages; you seem to conflate the
two a few times upthread).


From venable.devin at gmail.com  Thu May 29 21:43:56 2008
From: venable.devin at gmail.com (Devin)
Date: Thu, 29 May 2008 18:43:56 -0700 (PDT)
Subject: sharding research with pyshards
Message-ID: <934f5f2d-7a3a-4209-83ea-c674fec32666@w7g2000hsa.googlegroups.com>

If anyone is interested in sharding or horizontal partitioning, I've
started an open source project on Google Code with the intent of
building a general purpose sharding framework for python using MySQL.
If you have an interest in this area of research, please come on over
and get involved.

http://code.google.com/p/pyshards/

Devin Venable


From frikker at gmail.com  Mon May 19 15:04:46 2008
From: frikker at gmail.com (blaine)
Date: Mon, 19 May 2008 12:04:46 -0700 (PDT)
Subject: Thread killing - I know I know!
References: <DZSdnYx_IraeNrDVnZ2dneKdnZydnZ2d@bt.com>
	<6fda9c2c-84fe-4339-8ce2-25b6d6b97ba4@t54g2000hsg.googlegroups.com>
	<D9udnb6BatMSMazVnZ2dnUVZ8tHinZ2d@bt.com>
	<mailman.1355.1211218292.12834.python-list@python.org>
Message-ID: <8ac3f740-1c21-49c8-85e7-023ebe03d880@x41g2000hsb.googlegroups.com>

How is it that you recommend killing a pure python thread? And also,
when i use the 'threading' module am I creating a process, or a (gasp)
thread? (Is this an obvious question - and if so, how does one create
a 'process'?)

Thanks!


From efurman at admailinc.com  Thu May  1 14:24:25 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Thu, 01 May 2008 10:24:25 -0800
Subject: os.open and O_EXCL
Message-ID: <481A0AD9.8050502@admailinc.com>

Greetings!

I am trying to lock a file so no other process can get read nor write 
access to it.  I thought this was possible with os.open(filename, 
os.O_EXCL), but that is not working.  I am aware of the win32file option 
to do file locking, so my question is this:  what is the purpose of the 
os.O_EXCL flag?

Thanks for any help.
--
Ethan
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From paul.hankin at gmail.com  Wed May 21 02:38:41 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 23:38:41 -0700 (PDT)
Subject: iterate start at second row in file not first
References: <5be1e521-3a32-45f6-9812-5efed0187920@b9g2000prh.googlegroups.com>
Message-ID: <f7d0c496-9d65-4985-b3de-b232cfb16026@l42g2000hsc.googlegroups.com>

On May 20, 7:34?pm, notnorweg... at yahoo.se wrote:
> i have a big file with sentences, the first file of each sentence
> contains a colon(:) somewher eon that line
> i want to jump past that sentence.
>
> if all(x != ':' for x in line):
>
> this way i ?can check but i dont want to check for every line in the
> whole file, quite unnecessary when i only need to
> chekc the first line.
>
> so the question is, when dealign with iterators like:
> mov = open(afile)
> for line in mov:
> ? ? ? ? do y
>
> how do i jump the first step there? i dont want to iterate the first
> row...how do i start at the second?

import itertools

mov = open(afile)
for line in itertools.islice(mov, 1, None):
    do y

--
Paul Hanin


From kyosohma at gmail.com  Thu May  8 17:15:10 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 8 May 2008 14:15:10 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
Message-ID: <5016e80c-a02a-4ee8-acbb-8aadd3877251@k37g2000hsf.googlegroups.com>

On May 8, 4:10?pm, "Joe P. Cool" <joe.p.c... at googlemail.com> wrote:
> So far I have a little experience with Tkinter and wxPython. I wonder
> which of the numerous Python GUI kits would be the best choice for a
> multi platform application that makes heavy use of custom controls, 3D
> views and the like? Thanks in advance for your hints and advice.
>
> Joe

I can't speak for Tkinter, but wxPython has lots of widgets to choose
from and a number of developers that create custom widgets. They have
a page on their wiki devoted to custom widgets here:

http://wiki.wxpython.org/CreatingCustomControls

And here's another article:

http://www.zetcode.com/wxpython/customwidgets/

I find their mailing list to have extremely knowledgeable users that
are happy to help newbs too. Hopefully someone with Tkinter experience
can tell you about it robustness or lack thereof.

Mike


From upton at virginia.edu  Thu May 15 10:26:18 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 10:26:18 -0400
Subject: send yield
In-Reply-To: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805150726g7e3f79f4gce38b5d0b8cd231f@mail.gmail.com>

On Thu, May 15, 2008 at 9:32 AM, castironpi <castironpi at gmail.com> wrote:
> Why can't I write this?
> --

Because your antecedent is undefined?


From deets at nospam.web.de  Thu May 22 10:59:00 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 16:59:00 +0200
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
	<cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>
Message-ID: <69lg2iF33qnpqU1@mid.uni-berlin.de>

s0suk3 at gmail.com wrote:

> On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>>
>> > Hi, I wanted to know how cautious it is to do something like:
>>
>> > f = file("filename", "rb")
>> > f.read()
>>
>> > for a possibly huge file. When calling f.read(), and not doing
>> > anything with the return value, what is Python doing internally? Is it
>> > loading the content of the file into memory (regardless of whether it
>> > is discarding it immediately)?
>>
>> I am not a Python interpreter developer, but as user, yes I'd expect that
>> to happen. The method doesn't know you are not doing anything with its
>> return value.
>>
>> > In my case, what I'm doing is sending the return value through a
>> > socket:
>>
>> > sock.send(f.read())
>>
>> > Is that gonna make a difference (memory-wise)? I guess I'm just
>> > concerned with whether I can do a file.read() for any file in the
>> > system in an efficient and memory-kind way, and with low overhead in
>> > general. (For one thing, I'm not loading the contents into a
>> > variable.)
>>
>> Doesn't matter. You allocate a string in which the contents is loaded
>> (the return value of 'f.read()', and you hand over (a reference to) that
>> string to the 'send()' method.
>>
>> Note that memory is allocated by data *values*, not by *variables* in
>> Python (they are merely references to values).
>>
>> > Not that I'm saying that loading a huge file into memory will horribly
>> > crash the system, but it's good to try to program in the safest way
>> > possibly. For example, if you try something like this in the
>>
>> Depends on your system, and your biggest file.
>>
>> At a 32 bit platform, anything bigger than about 4GB (usually already at
>> around 3GB) will crash the program for the simple reason that you are
>> running out of address space to store bytes in.
>>
>> To fix, read and write blocks by specifying a block-size in the 'read()'
>> call.
> 
> I see... Thanks for the reply.
> 
> So what would be a good approach to solve that problem? The best I can
> think of is something like:

You are aware that read() takes an int-argument to limit the number of bytes
returned, and of course advances the internal seek-pointer for you?

Diez


From darcy at druid.net  Fri May  2 11:07:55 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Fri, 2 May 2008 11:07:55 -0400
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87bq3ozs09.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
	<mailman.443.1209705168.12834.python-list@python.org>
	<871w4l1cjj.fsf@benfinney.id.au>
	<mailman.445.1209714850.12834.python-list@python.org>
	<87r6ckzvyv.fsf@benfinney.id.au>
	<roy-941E34.10113602052008@70-1-84-166.area1.spcsdns.net>
	<87bq3ozs09.fsf@benfinney.id.au>
Message-ID: <20080502110755.85e2ea4e.darcy@druid.net>

On Sat, 03 May 2008 00:43:02 +1000
Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Roy Smith <roy at panix.com> writes:
> > Have you ever shipped software to a customer?
> 
> Yes, and all parties have been quite happy with the results.

When some of us talk about shipping software we aren't talking about a
20 line script delivered to our uncle's construction company office.  We
are talking about millions of lines of code in thousands of programs and
modules that has to run out of the box on whatever system the client
happens to run on.

> > Customer: "I can't install it there because <insert whatever silly
> > reason the customer has>. If you can't make your product work
> > without requiring me to install python in /usr/bin, I'm afraid I
> > can't buy your product".
> 
> At this point they have the simple option of running the program with
> 'python /path/to/the/program'. It's certainly not a case of "can't
> make the product work".

Simple for your 20 line single script.  Not so simple for my million
line, integrated system that has to work everywhere.

> It is, however, a case of "can't automatically account for every local
> customisation sysadmins choose to make on their systems". Perfectly
> willing to work with them to get their specific environment working,
> but as a matter of simple economics it's not worth my time to attempt
> to make such corner cases work automatically.

If by "corner case" you mean "some system that I don't personally run"
then OK but to some of us your system is the corner case and we would
like our code to run there as well.

Real software has to deal with the fact that support costs money.
You may be able to deal with one or two clients that way but that does
not scale very well.

> If they've already chosen to install Python to some unpredictable
> location, they know what they're doing enough to invoke the program in
> a specific way to get it working.

Unpredictable to you.  Perfectly predictable on their system.

I do believe I am done with this thread.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From malaclypse2 at gmail.com  Wed May 21 08:49:56 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 21 May 2008 08:49:56 -0400
Subject: Database Query Contains Old Data
In-Reply-To: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
References: <33b13117-0f9f-435d-b8f8-19f1ed3a121a@d77g2000hsb.googlegroups.com>
Message-ID: <16651e80805210549o16853e87h6f91be981f65fa43@mail.gmail.com>

On Wed, May 21, 2008 at 6:30 AM,  <giraffeboy at gmail.com> wrote:
> The first time you run a report, everything works as expected but if
> you run it a second time, after modifying data, it seems that the data
> from before the modification is selected on the second report run.

Did you remember to commit your changes before re-running the report?
Python's DB API requires that any auto-commit feature of the
underlying database be turned off by default, so you are required to
commit changes yourself.  If you're used to having auto-commit turned
on, this can be confusing.

See http://www.python.org/dev/peps/pep-0249/ for more details of
python's DB API.

-- 
Jerry


From jeffober at gmail.com  Thu May  1 08:00:13 2008
From: jeffober at gmail.com (Jeff)
Date: Thu, 1 May 2008 05:00:13 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
Message-ID: <bc1b3843-90df-429b-9f3e-3a61d2bc5b86@f63g2000hsf.googlegroups.com>

Look at the pickle and marshal modules.


From bruno.desthuilliers at gmail.com  Wed May  7 18:44:10 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 7 May 2008 15:44:10 -0700 (PDT)
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
Message-ID: <0ce7b198-ce01-4565-bc0c-95a87102589f@e39g2000hsf.googlegroups.com>

On 7 mai, 23:38, globalrev <skanem... at yahoo.se> wrote:
> i have a rough understanding of lambda but so far only have found use
> for it once(in tkinter when passing lambda as an argument i could
> circumvent some tricky stuff).
> what is the point of the following function?
>
> def addn(n):
>                 return lambda x,inc=n: x+inc

It returns a function that accept one argument and return the result
of the addition of this argument with the argument passed to addn.

FWIW, Python's lambda is just a shortcut to create a very simple
function, and the above code is canonically written as:

def makeadder(n):
  def adder(x):
    return n + x
  return adder

> if i do addn(5) it returns
>
(snip)

> <function <lambda> at 0x01D81830>
>
> ok? so what do i write to make it actually do something.

add5 = addn(5)
add5(1)
=> 6
add5(2)
=> 7

add42 = addn(42)
add42(1)
=> 43

> and is the
> inc=n necessary i cant do x+n?

In this case, it's not. This version does exactly the same thing
AFAICT:

def addn(n):
    return lambda x: x+n



From gherron at islandtraining.com  Wed May 14 01:03:39 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 13 May 2008 22:03:39 -0700
Subject: What is self.file = file for?
In-Reply-To: <670cc5db0805131532y32c2b938y6fcd7a5592a70f64@mail.gmail.com>
References: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>	
	<482A154C.1030204@islandtraining.com>
	<670cc5db0805131532y32c2b938y6fcd7a5592a70f64@mail.gmail.com>
Message-ID: <482A72AB.4080000@islandtraining.com>

Chester wrote:
> I see. A very good explanation indeed. Thank you for it. But why would
> anyone want to do this anyway?
>   

In a single sentence, OOP (Object Oriented Programming) is a way to 
organize a program around your data and the operations on that data.  
Many books and college courses are dedicated to OOP.  Years could be 
spent learning to apply its concepts.  A web search would find a flood 
of such information.

Gary Herron
>
>
>
> On Wed, May 14, 2008 at 12:25 AM, Gary Herron
> <gherron at islandtraining.com> wrote:
>   
>> wxPythoner at gmail.com wrote:
>>
>>     
>>> Hello!
>>>
>>> I have trouble understanding something in this code snippet:
>>>
>>> class TextReader:
>>>    """Print and number lines in a text file."""
>>>    def __init__(self, file):
>>>        self.file = file
>>>        .
>>>        .
>>>        .
>>>
>>>
>>> When would you do a thing like  self.file = file  ? I really don't
>>> find an answer on this. Please help me understand this.
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>>
>>>       
>>  If you know about Object-Oriented Programming this should make sense.  If
>> you don't, then you have some reading/learning to do first.
>>
>>  When someone wants to create an object of type TextReader, they must supply
>> a value
>>   ob = TextReader(v)
>>  That calls the __init__ constructor with the supplied value of v in the
>> variable named file.
>>  If the object being created wants to record the value for future use, then
>> the line
>>   self.file = file
>>  does just that.   "self" is the name of the object being created,
>> "self.file" is an attribute named "file" of that object, and the assignment
>> stores the supplied value there.
>>
>>  Gary Herron
>>
>>
>>
>>     



From bruno.desthuilliers at gmail.com  Wed May 14 16:30:04 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:30:04 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
Message-ID: <844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com>

On 14 mai, 18:20, castiro... at gmail.com wrote:
> I'm concerned over the future of Python.  Should tuples be named?

Obviously not, unless they should.


From informfr at gmail.com  Mon May 12 21:26:55 2008
From: informfr at gmail.com (JL)
Date: Mon, 12 May 2008 18:26:55 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <24d18f4d-45c2-4009-8f02-1b9dd9ddfd96@m36g2000hse.googlegroups.com>

If the game runs normally without IDLE, then, to run it from IDLE, add
pygame.quit() at the end of the script:

if __name__ == "__main__":
    MainWindow = PyManMain()
    MainWindow.MainLoop()
    pygame.quit()

... and just before the sys.exit():

    def MainLoop(self):
        """This is the Main Loop of the Game"""
        while 1:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    sys.exit()


From fc14301589 at icqmail.com  Thu May 22 02:57:16 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 14:57:16 +0800
Subject: how to proccess the blank in the path on linux
References: <mailman.1423.1211380035.12834.python-list@python.org>
Message-ID: <48351958_2@news.tm.net.my>

On 22:26, mercoled? 21 maggio 2008 zhf wrote:

> I want ro walk a directory and its sub directory on linux

os.path.walk() should do the job.
Recursively you should try this, which I found on some web site:

8<---------8<---------8<---------8<---------8<---------8<---------

def file_find(folder, fname):
    """search for a filename fname starting in folder"""
    for root, dirs, files in os.walk(folder):
        for file in files:
            # make search case insensitive
            if fname.lower() == file.lower():
                return Path.join(root, fname)

8<---------8<---------8<---------8<---------8<---------8<--------

Definitely I don't know about path with spaces or Unicode file names.




From gneuner2/ at /comcast.net  Sat May 10 21:26:54 2008
From: gneuner2/ at /comcast.net (George Neuner)
Date: Sat, 10 May 2008 21:26:54 -0400
Subject: implementation for Parsing Expression Grammar?
References: <a450ef08-642f-484d-97bc-614121b502f8@c19g2000prf.googlegroups.com>
Message-ID: <vdhc245g2fh8que71re3beuok2i5e8snm9@4ax.com>

On Fri, 9 May 2008 22:52:30 -0700 (PDT), "xahlee at gmail.com"
<xahlee at gmail.com> wrote:

>In the past weeks i've been thinking over the problem on the practical
>problems of regex in its matching power. For example, often it can't
>be used to match anything of nested nature, even the most simple
>nesting. It can't be used to match any simple grammar expressed by
>BNF. Some rather very regular and simple languages such as XML, or
>even url, email address, are not specified as a regex. (there exist
>regex that are pages long that tried to match email address though)

What's your point?  The limitations of regular expressions are well
known.

>After days of researching this problem, looking into parsers and its
>theories etc, today i found the answer!!
>
>What i was looking for is called Parsing Expression Grammar (PEG).

PEG has its own problems - it's very easy with PEG to create subtly
ambiguous grammars for which quite legal looking input is rejected.
And there are no good tools to analyze a PEG and warn you of subtle
problems.

Chris Clark (YACC++) has posted at length about the merits, problems
and limitations of various parse techniques - including PEG - in
comp.compilers.  Before you consider doing anything with PEG I suggest
you look up his posts and read the related threads.


>It seems to me it's already in Perl6, and there's also a
>implementation in Haskell. Is the perl6 PEG is in a usable state?
>
>Thanks.
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/

George
--
for email reply remove "/" from address


From cwitham at summit-systems.com  Tue May 13 14:50:23 2008
From: cwitham at summit-systems.com (Carl  Witham)
Date: Tue, 13 May 2008 14:50:23 -0400
Subject: Summit Systems
Message-ID: <0A6665114EE5F743BCEB62B4C8FF323A01284F40@morpheus>

Good afternoon.

I am in dire need of a engineer with Python experience.

Currently the 4 month contract assignment is for a Software Test
Engineer to assist in creating software. 

In this role candidates will write test plans and test cases from
requirements or design specifics; Create test programs and tools for the
software components at both unit and system level; Execute and analyze
the results of the tests, both automated and manual ; Set up, configure
and maintain a variety of test environments; Isolate problems and log
bugs. Essential skills include experience with software lifecycles;
Experience in writing and performing software test plans; 

Experience with Linux, C/C++ and Python scripting languages, and
networking technologies; System administration in Linux preferred,
Windows a plus

If you, or someone in your network, could assist me with this - I
certainly would appreciate a call.

Thanks or your time.

Carl Witham
Technical Recruiter
Summit Systems
A Division of Summit Technical Services
Local:      781-794-3294 x 1133
Toll free:  877-800-8303 x 1133
Fax:         781-849-7327
cwitham at summit-systems.com
www.summit-systems.com <http://www.summit-systems.com/> 


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From bruno.42.desthuilliers at websiteburo.invalid  Fri May 23 03:18:33 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 23 May 2008 09:18:33 +0200
Subject: Calling class method by name passed in variable
In-Reply-To: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
Message-ID: <48366fb1$0$4879$426a74cc@news.free.fr>

Sagari a ?crit :
> Greetings,
> 
> Can someone suggest an efficient way of calling method whose name is
> passed in a variable?
> 

method = getattr(obj, 'method_name', None)
if callable(method):
     method(args)


From mailpitches at email.com  Fri May  2 13:15:03 2008
From: mailpitches at email.com (mp)
Date: Fri, 2 May 2008 10:15:03 -0700 (PDT)
Subject: Non-blocking connect
Message-ID: <59915ad0-2af1-4903-8ffd-48da2ce4e647@y22g2000prd.googlegroups.com>

Code is at bottom. Basically, if I turn off socket blocking prior to
connecting, I get a "Socket is not connected" error when I try to send
data. However, if I do not turn off blocking, OR if I place a print
statement anywhere before the send call, it works! WTF?

I'd like to understand what's going on in the background here, if you
know don't skimp on the details.

Thanks

---------------------------------------------------------------
import
socket
sock = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
sock.setblocking(0)
sock.connect_ex(('localhost',
9000))
sock.setblocking(1)
sock.send('foo')
sock.close()


From arnodel at googlemail.com  Tue May 13 16:25:39 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 21:25:39 +0100
Subject: python: lexical or dynamic scope?
References: <5d138bd1-a382-4b49-80b6-abffaaef2762@w7g2000hsa.googlegroups.com>
Message-ID: <m2d4nqar3w.fsf@googlemail.com>

globalrev <skanemupp at yahoo.se> writes:

> i cant figure outif python has lexical or general scope.
>
> it seems functions have lexical scope but with some restrictions and
> some non-function scopes are dynamic?

I can't think of any instance of dynamic scoping in Python.  Can you
give an example of what you are thinking of?

AFAIK, Python has lexical scoping, with the restriction that
non-global non-local names cannot be rebound.

-- 
Arnaud


From enleverlesX.XmcX at XmclaveauX.com  Fri May 23 14:48:28 2008
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Fri, 23 May 2008 20:48:28 +0200
Subject: Python is slow
In-Reply-To: <16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<16cb4d63-1b40-4ab8-8ba7-120ece4f4d75@y38g2000hsy.googlegroups.com>
Message-ID: <4837125e$0$862$ba4acef3@news.orange.fr>

Bonsoir !

Perso, je pense que des pr?cisions comme celles de Bruno sont tr?s 
utiles, car elles ?vitent les d?rives, et l'apparition de langages 
b?tards, et impurs (pythonesquement parlant).

Non aux Pythons OGM !!!

Toutefois, iles est dommage que je comprenne pas l'anglais, et donc pas 
vraiment son message/discours...

@+

Michel Claveau



From univbgp100 at gmail.com  Fri May 30 05:49:40 2008
From: univbgp100 at gmail.com (Dhanabal)
Date: Fri, 30 May 2008 02:49:40 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP and more...
Message-ID: <4b6a813b-c3b0-43e3-83ca-fbf243244ecf@y22g2000prd.googlegroups.com>

access all computer tutorials for free visit http://freecomputertutorialz1.blogspot.com/


From martin at v.loewis.de  Thu May  1 11:41:35 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 01 May 2008 17:41:35 +0200
Subject: Please help me with linking libraries on Solaris 10 sparc
In-Reply-To: <675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
References: <89620267-578c-4d06-9afd-0684b5d646f5@c58g2000hsc.googlegroups.com>
	<4819D40A.1000205@v.loewis.de>
	<675e5d14-49c0-4ee3-8ab9-88f8926b68a3@x41g2000hsb.googlegroups.com>
Message-ID: <4819E4AF.4060103@v.loewis.de>

> Martin, could you please tell me how to do this, I am pretty new in
> Solaris.

It's fairly complicated, so I'm not sure I can give you the full
tutorial in a Usenet message.

In essence, you need to spot the linker line in the build process,
(e.g. by the -o option to the compiler), and add -lm to it.

If you cannot do this on your own, I recommend you hire somebody
who can.

Regards,
Martin


From alex.m.gusarov at gmail.com  Thu May 29 07:27:43 2008
From: alex.m.gusarov at gmail.com (Alex Gusarov)
Date: Thu, 29 May 2008 18:27:43 +0700
Subject: Unit tests?
Message-ID: <ac6dcb3d0805290427y1a003db1ya7d1685822ad5135@mail.gmail.com>

Hello, it seems that I have a problem - I almost finished my program
and it's necessary to test it. But I've never do it before. I even
don't know how I can do it.
Please, give me some links to testing techniques, either common or
specific to Python.
I searched in Google for information, but 'cause I don't know anything
about subject, I don't know where to start from.

Thanks
--
Best regards, Alex Gusarov


From malaclypse2 at gmail.com  Fri May  2 15:17:20 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 2 May 2008 15:17:20 -0400
Subject: list.index crashes when the element is not found
In-Reply-To: <18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
	<491f6$481b6455$547@news.teranews.com>
	<18cd9b76-91e7-4830-af75-cc9c97536347@d45g2000hsc.googlegroups.com>
Message-ID: <16651e80805021217o72312627n1b1dad6c88721301@mail.gmail.com>

On Fri, May 2, 2008 at 3:04 PM, TkNeo <tarun.kap at gmail.com> wrote:
>  ofcouse try catch is going to work but in ideality the index function
>  should return a -1 and no way in hell crash.

It doesn't crash.  It raises an exception.  This is a pretty
fundamental concept of python programming.  If you intend to program
in python, then you're going to have to deal with it.

Besides, returning -1 is a bad idea.  Take a look at the following:

lst = [1, 2, 3]
pos = lst.index(99)
lst[pos] = 0
print lst

What do you expect the result to be?  If lst.index(99) returned -1,
then lst would be [1, 2, 0], because negative indexes of a list are
perfectly valid in python -- they just count from the end of the list.

-- 
Jerry


From hniksic at xemacs.org  Thu May 15 13:02:39 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 15 May 2008 19:02:39 +0200
Subject: no inputstream?
References: <mailman.1167.1210864003.12834.python-list@python.org>
Message-ID: <87lk2ba4b4.fsf@mulj.homelinux.net>

"John Krukoff" <jkrukoff at ltgc.com> writes:

> I'd love to know how Java handles all that automatically through a
> generic stream interface, though.

It could be that their stream interface supports seek(), and that
seek()ing on HTTP connection sends the appropriate range request and,
if it fails, throws an appropriate exception which the client code
interprets as "seeking impossible, read the whole file".

But that doesn't apply to the InputStream interface described at
http://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStream.html -- no
seeking there.


From bj_666 at gmx.net  Fri May  2 02:56:59 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 May 2008 06:56:59 GMT
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<mailman.436.1209681204.12834.python-list@python.org>
Message-ID: <67vs9qF2r409aU2@mid.uni-berlin.de>

On Thu, 01 May 2008 15:33:09 -0700, Gary Herron wrote:

> Of course it's not thread safe.   For the same reason and more basic, 
> even the expression i++ is not thread safe in C++.
> 
> Any such calculation, on modern processors, requires three operations: 
>   retrieve value of i into a register,
>   increment the register
>   write the value into i.

There are no modern processors with an opcode for incrementing a memory
location!?  At least my C64 can do that.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From ludvig.ericson at gmail.com  Tue May 13 12:35:14 2008
From: ludvig.ericson at gmail.com (ludvig.ericson at gmail.com)
Date: Tue, 13 May 2008 09:35:14 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>
Message-ID: <cfb20fb4-f7c9-476b-87f2-c482fcfa3ee6@t54g2000hsg.googlegroups.com>

> In a pure world, the only writing that is done would be within the
> handle_send() callbacks within the select loop. ?Then again, in a
> perfect world, calling readable() and writable() would have no strange
> side affects (as your example below has), and all push*() calls would
> be made within the handle_*() methods.

It wouldn't have those side-effects if push really just pushed. :-P

> We do not live in a pure world, Python isn't pure (practicality beats
> purity), and by attempting to send some data each time a .push*()
> method is called, there are measurable increases in transfer rates.

-- 8< --

> Yes, it would be convenient to not have push*() actually send data
> when called in some cases, but in others, the increase in data
> transfer rates and/or reduction in latency is substantial.

If it increases transfer speed that much, the calling application
almost has to be broken, or at least not designed as it should be - of
course there are such applications, but you know...

Anyway, I went for a subclassing way of dealing with it, and it works
fine.

Thanks for the reply though, hadn't considered possibly "flawed"
applications where the asyncore loop isn't revisited as often as it
should. :->
Ludvig


From castironpi at gmail.com  Fri May 16 09:35:50 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:35:50 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
Message-ID: <57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com>

On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
>
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Kay Schluehr a ?crit :
>
> > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > >> Hello all,
>
> > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > >> It appeared to be the following:
>
> > >> class A(object):
> > >> ? ? pass
>
> > >> print min(1.0, A())
>
> > >> which is accepted by Python even though the A() object is not numerical in
> > >> nature.
>
> > >> The cause of this behavior seems to be the compare operation of the object
> > >> class.
>
> > >> Is there a way to disable this behavior in Python (other than deriving a new
> > >> 'object-like' class that doesn't do comparisons?)
>
> > > Are you sure you don't want to use a statically typed language that
> > > captures all type errors just by inspecting your source code?
>
> > This is not necessarily a static vs dynamic typing problem. The
> > following code will raise a TypeError for very good reasons:
>
> > ? ? print 1.0 + A()- Hide quoted text -
>
> > - Show quoted text -
>
> I question the real-world examples of coercion, casting, and
> upcasting. ?C insists that defining by operator, which may or may not
> relate to system, is the only legal move. ?I doubt operator+ is well-
> defined on non-ideal structures. ?Rationals are not floats, but system
> got checked. ?Define concurrency.- Hide quoted text -
>
> - Show quoted text -

I would be bouncing localcy and remoticy.  What word's on the bar?


From deets at nospam.web.de  Wed May 28 18:07:07 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 00:07:07 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
	<4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com>
Message-ID: <6a63cgF34irclU1@mid.uni-berlin.de>

Dave Parker schrieb:
> On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>>> Kind of like how this year's program won't work on next year's
>>> Python?
>> For somebody who has admitted to have only very rudimentary knowledge of
>> python that's a pretty bold statement, don't you think?
> 
> Everthing I know, I learned from Wikipedia. ;)
> 
> http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_and_compatibility
> 
> "Like Perl 6, Python 3.0 will break backward compatibility. There is
> no requirement that Python 2.x code will run unmodified on Python 3.0.
> There are basic changes such as changing the print statement into a
> print function (so any use of the print statement will cause the
> program to fail) ..."

You should read further:

"""
However, a tool called "2to3" does most of the job of translation, 
pointing out areas where it wasn't sure using comments or warnings. Even 
in an alpha stage 2to3 appears to be fairly successful at performing the 
translation.
"""

And all this is about Py3k- nobody forces anybody to leave python 2.x 
series.

I think you should contort yourself a bit wrt backwards compatibility 
and stability - given that FT is by no means an established and 
productive tool.

Diez


From python at bc90021.net  Sun May 11 16:11:28 2008
From: python at bc90021.net (bc90021)
Date: Sun, 11 May 2008 20:11:28 GMT
Subject: File Creation Not Working In A Thread Class?
References: <WLFVj.32499$KJ1.2751@newsfe19.lga>
	<m2ej884uau.fsf@googlemail.com> <7qGVj.32505$KJ1.18416@newsfe19.lga>
	<m2abiw4rze.fsf@googlemail.com> <h6HVj.32508$KJ1.28377@newsfe19.lga>
	<da45fec5-9244-44a5-8a82-411b6126d4db@x41g2000hsb.googlegroups.com>
	<HNHVj.32518$KJ1.10846@newsfe19.lga> <m21w484o4e.fsf@googlemail.com>
Message-ID: <QpIVj.32520$KJ1.5565@newsfe19.lga>

[CUT]
> I have in no way assumed that you are stupid.  I have tried to help you
> formulate your problem better so that people on the list can help you. 
> I believe I have done so respectfully, with the aim of introducing you
> to the modus operandi of this group.

I appreciate your help.  However, the comments I got from other people 
that "I'm sure you have quotes here..." type comments are incredibly 
insulting.  To tell someone that you're sure that they have quotes around 
something when they don't is the height of arrogance and rudeness.

>> (I really must say that so far the help I am getting in the Python
>> community is a big let down.  Whether it's on IRC or here, everyone has
>> an arrogance that I don't find anywhere else in the open source
>> community, and it seriously makes me question the choice of language
>> that I've made.)
> 
> Don't judge too quickly.  I think this newsgroup is on the whole
> extremely helpful.  I have learnt a lot from it.  But you have to get
> used to its ways, and until you are familiar with them, approach it with
> humility.

Unfortunately, this is not my first interaction with the Python IRC 
communities or Python newsgroups.  I had tried working with this language 
a while back (around 2000) and the answers I got were unhelpful and 
usually rude.  I decided to give it another shot for the program I'm 
writing, and I'm regretting that.  It's possible that I'm to blame - I'm 
the common factor in both instances, but at the same time, when you ask a 
question in #python and NO ONE ANSWERS at all, and they all just sit 
there not talking at all, what's the point of having the IRC channel?  If 
newbies can't go there for help, what's the point?  When there are 70 
people in a channel, and no one even acknowledges your question has been 
asked, where does one go for help?  It's like talking to yourself.

>> The error message was at the top of the thread (am I incapable of
>> posting it, or are you incapable of following a thread?), but here it
>> is again:
>>
>> IOError: [Errno 2] no such file u'tempfileName'
> 
> This is different from the error message that you posted in your
> original message.
> 
> Anyway, what is useful to us is a full traceback, no just an error
> message.

It is not "different" except that I posted the full name the second 
time.  (tempfileName instead of the previously simplified fileName)  The 
code itself is actually irrelevant, in my humble opinion.  In one place a 
file creation line does not work; in the second place it does.  How can 
the same line of code do two different things in two places?  Either it 
creates a file or it doesn't.  It should create the file in either place, 
regardless of where it's being called.

Either way, I figured it out.


From fetchinson at googlemail.com  Mon May 12 13:19:55 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Mon, 12 May 2008 10:19:55 -0700
Subject: Is there no single/uniform RDBMS access API module for Python ?
In-Reply-To: <3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
References: <3de8e1f70805112243u765fc507v32c5461be34d4077@mail.gmail.com>
	<4827E6B9.3080509@shopzeus.com>
	<3de8e1f70805112345u672d8ec0ia1aaa10a55e1b048@mail.gmail.com>
Message-ID: <fbe2e2100805121019h7bb4512me3a6a0a18d1eabb7@mail.gmail.com>

> >>  Again a noob question.
> >>  Based on this URL http://wiki.python.org/moin/DatabaseInterfaces , is it
> >> correct to conclude that there is no RDBMS agnostic, single/uniform DB
> >> access API for Python ?
> >> Something in the lines of JDBC for Java, DBD for Perl etc. ?
> >>  How is the RDBMS change handled for solutions which need to work with
> >> different RDBMSs ??
> >>
> > http://www.python.org/dev/peps/pep-0249/
> >
>
>
> That appears to be only an API specification. Are there any implementations
> of that ?

For sqlite: http://oss.itsystementwicklung.de/trac/pysqlite/ if you
have python < 2.5 for 2.5 and up it is included in the stdlib

For mysql: http://sourceforge.net/projects/mysql-python

There are a tons more, including postgresql, oracle, etc:
http://wiki.python.org/moin/DatabaseInterfaces

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From zentraders at gmail.com  Sat May 10 11:01:05 2008
From: zentraders at gmail.com (Zentrader)
Date: Sat, 10 May 2008 08:01:05 -0700 (PDT)
Subject: People still using Tkinter?
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>

I like New Mexico Tech's site as well.  Also, take a look at the PMW
extension for additional widgets, and TkTable and/or TableListWrapper.
http://infohost.nmt.edu/tcc/help/pubs/tkinter/


From lac at openend.se  Tue May 27 09:13:28 2008
From: lac at openend.se (Laura Creighton)
Date: Tue, 27 May 2008 15:13:28 +0200
Subject: looking for membership management software -- Open Source,
	written in Python 
In-Reply-To: Message from miller.paul.w@gmail.com of "Mon,
	26 May 2008 12:38:28 PDT."
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>
References: <mailman.1613.1211812586.12834.python-list@python.org>
	<c2ea486f-53eb-4ec5-ba63-767770b82cf6@z72g2000hsb.googlegroups.com>
Message-ID: <200805271313.m4RDDSTM019094@theraft.openend.se>

In a message of Mon, 26 May 2008 12:38:28 PDT, miller.paul.w at gmail.com writes:
>I forgot to ask: what's your target platform?  I mentioned Organizer's
>Database, but it only runs on Windows.  If you need a Linux or OS X
>solution, then I can make another suggestion. :-)

Ah, FreeBSD would be the best -- as in making our sysadmins very, very
happy but linux would also be very acceptable, and probably OS X as well.
But PHP is probably not.

Thanks again,
Laura



From sarenius at sun3.oulu.fi  Sun May 25 13:13:14 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 17:13:14 +0000 (UTC)
Subject: UTF problem?
Message-ID: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>

I am trying to set up Linux printing via Windows XP and using this HOWTO:

http://justin.yackoski.name/winp/

I have one problem. When I send a file via CUPS to the windows spool
directory dirwatch.py (http://justin.yackoski.name/winp/dirwatch.txt) dies
and gives:

UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0'
in position 77: ordinal not in range (128)

I think that this has something to do with UTF-8 what I do not know is how
to get over it? 

So could someone please help me to get dirwatch.py script to understand my
filenames (which, btw, do not have any non-ascii symbols, and will work
if I manually copy-rename them).

Thanks in advance!

Vesa-Matti 

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *





From benjamin.kaplan at case.edu  Tue May 27 11:33:30 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Tue, 27 May 2008 11:33:30 -0400
Subject: New chairman
In-Reply-To: <529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805270833u77f5aae2u6a8af0d3376501e8@mail.gmail.com>

On Tue, May 27, 2008 at 11:26 AM, Sverker Nilsson <sn at sncs.se> wrote:

> I dont want to be a new Guido. Somebody else please.
>
> S.
>
>
> On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> > I was talking about Guido van Rossum
> >
> > The one who decides, so far when people agree
> >
> > But we can make a new fork
> >
> > He is the originator, but now it seems, for me, it is hanging out in
> > the air
> >
> > So we need some new leadership
> >
> > From somebody, somebody like you perhaps. Or me.
> >
> > Sverker
> >
> > On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> > wrote:
> >
> > > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
> >
> > > > seems to be needed
> >
> > > > He doesn't seem to care much anyway now
> >
> > > > Or if he cares, he have many other assignments
> >
> > > Who are you talking about?
> >
> > > > So should we try to elect a new chairman?
> >
> > > Chairman? Elaborate please.
> >
> > > > I am probably not eligible. There must be many others.!
> >
> > > > Do you dare?consper
> >
> > > Hm, are you and castrionpi twin brothers or something?
> >
> > > > S.
> > > > --
> > > >http://mail.python.org/mailman/listinfo/python-list
> >
> > > --
> > > Wbr, Andrii Mishkovskyi.
> >
> > > He's got a heart of a little child, and he keeps it in a jar on his
> desk.
>

Andrii, I think you were right. He must be related to castrionpi somehow.
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From workitharder at gmail.com  Wed May 21 15:02:09 2008
From: workitharder at gmail.com (bukzor)
Date: Wed, 21 May 2008 12:02:09 -0700 (PDT)
Subject: best way to check if pid is dead?
Message-ID: <90ecca29-c4d8-4e89-908a-93850d7de1bf@i76g2000hsf.googlegroups.com>

Does anyone have a pythonic way to check if a process is dead, given
the pid?

This is the function I'm using is quite OS dependent. A good candidate
might be "try: kill(pid)", since it throws an exception if the pid is
dead, but that sends a signal which might interfere with the process.

Thanks.
--Buck


From gagsl-py2 at yahoo.com.ar  Thu May 15 09:59:41 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 10:59:41 -0300
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
Message-ID: <op.ua67trlmx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich <dullrich at sprynet.com> escribi?:

> Having a hard time phrasing this in the form
> of a question...
>
> The other day I saw a thread where someone asked
> about overrideable properties and nobody offered
> the advice that properties are Bad. So maybe we've
> got over that. I suppose properties could have
> Bad consequences if a user doesn't know they exist
> and think that a certain property of an object is
> just an ordinary attribute. But that applies to
> almost any aspect of any language.

Which "bad consequences" are you thinking of? Apart from the user not being aware of the complexity of certain operations, or a getter/setter very time-consuming (in that case I'd use public getXXX/setXXX functions instead, to emphasize that "something" is happening, not just an attribute lookup)

> If a person comes from, say, Object Pascal (Delphi)
> then properties are hard to live without. The

You should read the article "Python is not Java" if you haven't done it yet.
http://dirtsimple.org/2004/12/python-is-not-java.html

> other day I decided I wanted what OP calls an
> "indexed property" or "array property". Couldn't
> figure out how to make a _property_ behave that way.
> So I read a little bit about descriptors, and a
> few minutes later I had an indexedproperty thing
> that works just like property, except it gives
> an indexed property! This is just too cool.
>
> Why? For example, a Matrix should have a row[n]
> property allowing things like
>
> m.row[0] = m.row[1] + m.row[2]
>
> Ok, you could do _that_ by just making row
> an ordinary list of Row objects. But then
> you'd have to say
>
> m.row[0] = Row([1,2,3])
>
> where I want to be able to say
>
> m.row[0] = [1,2,3]
>
> and have the Row created automatically.

One could make *row* an object with a custom __getitem__/__setitem__ in this case. But I prefer to have as little magic as possible on my objects: if it says m.row[0] = [1,2,3] I expect m.row[0] to actually *be* that list (whenever possible), and not any other object initialized from the [1,2,3] arguments. (Maybe this is some overreaction against C++ "magic" constructors and such horrible things...)

> _Also_ with these indexed properties my Matrix
> can have m.row[j] and m.col[k] that look exactly
> the same to a client - we don't want to store a
> list of rows internally and also store the same
> data in a list of columns. Too cool.

The same can be achieved having m.row and m.col be custom objects like I said above.

> Hmm, none of that's a valid excuse for a post here.
> Um, right, here we go: Anyone see problems or
> possible improvements with the implementation
> of indexedproperty below?

Note that the property object (or your indexedproperty) is a *class* attribute. That is, shared among all instances.

> class indexedproperty(object):
>   def __init__(self, getitem=None, setitem=None):
>     self.getitem = getitem
>     self.setitem = setitem
>
>   def __get__(self, obj, owner):
>     self.obj = obj
>     return self

Here is the problem. You can't store "obj" in "self" because it is shared among all instances. Your examples don't show any problem because all property accesses are immediately followed by a getitem access using the same object. Try this:

x = AClass()
y = AClass()
x.cell[0,0] = 1
print x.cell[1,1]   # output: 0
y.cell[x.cell[0,0], x.cell[0,0]] = 2
print y.cell[1,1]   # should be 2, still 0
print x.cell[1,1]   # should still be 0, but changed, now 2

A workaround would be to return another object in __get__ instead of self, which remembers the "obj" instance, or a closure, or...
But I don't really see the point, it's a lot easier to use another object for .cell (it's more clear, doesn't break encapsulation, divides responsabilities...)

class Matrix2x2(object):
   def __init__(self):
     self.cells = [[0,0], [0,0]]

   def __setitem__(self, (row, col), value):
     self.cells[row][col] = value

   def __getitem__(self, (row, col)):
     return self.cells[row][col]

class AClass(object):
   def __init__(self):
     self.cell = Matrix2x2()


-- 
Gabriel Genellina



From cokofreedom at gmail.com  Wed May 21 08:47:12 2008
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Wed, 21 May 2008 05:47:12 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com> 
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com> 
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com> 
	<48340938$0$10773$426a74cc@news.free.fr>
Message-ID: <1a01cb57-3b7e-4ce5-bbdb-ed9c8e70396d@59g2000hsb.googlegroups.com>

''.join(seen.add(c) or c for c in s if c not in seen)

>From what I can understand...

.join will be a String of unique 'c' values.

'seen.add(c) or c' will always point to the second statement 'c'
because seen.add(c) returns None.

'if c not in seen' will ensure 'c' being added to both the .join and
seen is unique.

That is really clever! I like it :) (but does require a bit of
knowledge about .add return None and the affect that has on the ..
or .. statement)


From upton at virginia.edu  Wed May 21 12:56:55 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 12:56:55 -0400
Subject: can someone with guessing a number
In-Reply-To: <005101c8bb61$b78fb710$1300a8c0@Home>
References: <005101c8bb61$b78fb710$1300a8c0@Home>
Message-ID: <5504f9ac0805210956o3e798659gb7485d1c3df54686@mail.gmail.com>

On Wed, May 21, 2008 at 12:42 PM, garywood <woodygar at sky.com> wrote:
> I would just like the program to exit after guessing the amount of numbers
> wrong
>
> # Guess My Number
> import random
> the_number = random.randrange(100) + 1
> tries = 1
> # guessing loop
> while (guess != the_number):
>     if (guess > the_number):
>         print "Lower..."
>     else:
>         print "Higher..."
>
>     guess = int(raw_input("Take a guess: "))
>     tries += 1
>     if tries > 10:
>         print 'you failed- give up'
>
> print "You guessed it!  The number was", the_number
> print "And it only took you", tries, "tries!\n"
>
> raw_input("\n\nPress the enter key to exit.")
>
> many Thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
>

How about you check tries > 10 in the condition for your while loop,
and then after the loop you use the value of tries to decide which
message to print out?


From gabe at dragffy.com  Thu May 15 06:52:10 2008
From: gabe at dragffy.com (Gabriel)
Date: Thu, 15 May 2008 10:52:10 +0000 (UTC)
Subject: List behaviour
References: <mailman.1154.1210846212.12834.python-list@python.org>
	<692i3kF2vrfbfU1@mid.uni-berlin.de>
Message-ID: <loom.20080515T105133-934@post.gmane.org>

Diez B. Roggisch <deets <at> nospam.web.de> writes:

> So instead of creating a list of list by the *-operator that only multiplies
> the references (which is fine immutable objects like strings or numbers),
> you need to explicitly create new lists, e.g. with a list-comprehension:
> 
> tasks = [[] for _ in xrange(6)]
> 
> Try this and everything will work as expected.
> 

Thanks, Diez.

Thanks to all who replied to help me with this :)



From kyosohma at gmail.com  Thu May 29 10:36:03 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 29 May 2008 07:36:03 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1721.1212054906.12834.python-list@python.org>
	<2a7d4ada-8c81-4cb5-8f0c-842b9406fbd8@z16g2000prn.googlegroups.com>
Message-ID: <caf9e88e-80f1-41ab-9a38-472255bbdf7c@34g2000hsh.googlegroups.com>

On May 29, 5:26?am, Kalibr <space.captain.f... at gmail.com> wrote:
> On May 29, 7:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
>
>
>
>
>
> > You don't say, but I assume you're on Windows since you mention
> > GetFileVersionInfo (which doesn't have anything to do with media
> > files, by the way) and WMA. There may be packages out there
> > to do all this already but if not you'll need to pull in a few disparate
> > modules and mix'n'match.
>
> > While ID3 readers (which determine the metadata for MP3) are reasonably
> > common few of them come ready-compiled for Windows. I've used Ned
> > Batchelder's id3reader [1] successfully for simple tasks so you might try
> > that. On the WMA side, you can automate Windows Media Player to get
> > metadata. (And it might work for .mp3; I've not tried).
>
> > <code>
> > import win32com.client
>
> > player = win32com.client.gencache.EnsureDispatch ("WMPlayer.OCX")
> > wmedia = player.mediaCollection.add (r"c:\temp\bells.mp3")
> > try:
> > ? artist = wmedia.getItemInfo ("Artist")
> > finally:
> > ? player.mediaCollection.remove (wmedia, False)
>
> > print "bells.mp3 has artist", artist
>
> > </code>
>
> > You're going to have to dig around for docs on this one. And it's not
> > pretty. Try starting from:
>
> >http://msdn.microsoft.com/en-us/library/bb249009(VS.85).aspx
>
> > TJG
>
> > [1]http://nedbatchelder.com/code/modules/id3reader.html
>
> Hmm, thanks for the info. Yes, I am using Winders (Vista to be exact)
> and I just assumed that there must be a way to programmatically get
> the stuff you get from choosing properties in the right click menu.
> But I guess there isn't (hard to believe, because I can't see MS hard-
> coding each and every file format's metadata into it's OS). I might
> have to learn more about the command prompt ( I hear there is a module
> for fiddling with it) and work from there.
>
> Cheers for the links though, I will be checking them out :)

You might also check out the ID3 library:

http://id3-py.sourceforge.net/

It doesn't look like it's been updated for a few years. I tested it on
XP and it seems to work though.

I also found this snippet, but it's pretty rudimentary:

http://snipplr.com/view/1624/python--get-id3-from-mp3-file/

Finally, check out the ID3 Handling section on this site:

http://wiki.python.org/moin/UsefulModules

-------
Mike

Blog: http://blog.pythonlibrary.org/


From larry.bates at websafe.com`  Wed May 21 21:57:38 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Wed, 21 May 2008 20:57:38 -0500
Subject: backport of 'set' to python 2.3?
In-Reply-To: <mailman.1459.1211420324.12834.python-list@python.org>
References: <mailman.1459.1211420324.12834.python-list@python.org>
Message-ID: <noednTbESqO7TqnVnZ2dnUVZ_vKdnZ2d@comcast.com>

Daniel Fetchinson wrote:
> Does anyone have a pure python implementation of the builtin 'set'
> object so that I could use that in python 2.3? If this would be the
> case that would be really great as I wouldn't have to change my code
> that runs happily on 2.5 and makes use of 'set'. Speed and performance
> doesn't matter, any implementation that does exactly the same as the
> builtin 'set' in 2.5 would be great.
> 
> Cheers,
> Daniel

 From "What's new in Python 2.4":

Python 2.3 introduced the sets module. C implementations of set data types have 
now been added to the Python core as two new built-in types, set(iterable) and 
frozenset(iterable). They provide high speed operations for membership testing, 
for eliminating duplicates from sequences, and for mathematical operations like 
unions, intersections, differences, and symmetric differences.

You should be able to use sets module in 2.3.

-Larry


From claird at lairds.us  Fri May  9 12:00:40 2008
From: claird at lairds.us (Cameron Laird)
Date: Fri, 9 May 2008 16:00:40 +0000
Subject: Books for a new generation of Pythoneers (was: Newbie to python ---
	why should i learn !)
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
	<fvunsh$jjm$1@aioe.org>
	<12b0b227-0a6c-4653-973b-8f13f2e5b3c1@v26g2000prm.googlegroups.com>
Message-ID: <829ef5-laf.ln1@lairds.us>

In article <12b0b227-0a6c-4653-973b-8f13f2e5b3c1 at v26g2000prm.googlegroups.com>,
maxinbjohn  <maxinbjohn at gmail.com> wrote:
>Hi Raxit,
>
>One of the the tempting features of Python is that it is fun to code
>in Python. If you are really trying to learn python, you should read
>Adventures with Neko (http://gnuvision.com/books/pybook/) . It is an
>introductory book on Python programming for school children by Mr.
>Pramode CE.
>
>It is fun for children (when I tried it, me too liked it) to do
>programming with Neko, the cat. I am sure that it will be a fun filled
>learning experience for you.
			.
			.
			.
Also of interest in the same regard:  the just-released (and
still on sale at Amazon?) <URL: http://www.manning.com/sande/ >.


From jeffober at gmail.com  Fri May  2 15:46:06 2008
From: jeffober at gmail.com (Jeff)
Date: Fri, 2 May 2008 12:46:06 -0700 (PDT)
Subject: Searching and replacing text ?
References: <6c06af6c-e068-4569-9a2d-f42df5fe1ff4@k37g2000hsf.googlegroups.com>
	<yKGdnfugFprY94bVnZ2dnUVZ_qelnZ2d@comcast.com>
Message-ID: <45ab1b06-bb29-4d49-87a2-be2407d8f2b0@d1g2000hsg.googlegroups.com>

If you know that, for instance, every occurrence of '[[' needs to be
replaced with ']]', then it is much faster to use regular string
methods.  If you have the text stored in the variable foo:

foo = foo.replace('[[', '[').replace(']]', ']').replace('->', '')

If you need to recognize the actual pattern, use REs:

regex = re.compile(r'\[\[(.+?) -> (.+?)\]\]')
regex.sub(r'[\1 \2]', foo)


From bj_666 at gmx.net  Fri May 23 09:04:15 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 13:04:15 GMT
Subject: Relationship between GUI and logic?
References: <48363c34$0$15204$607ed4bc@cv.net>
	<69n3poF33hfhfU1@mid.uni-berlin.de>
	<DExZj.2777$772.804@bignews2.bellsouth.net>
Message-ID: <69ntmfF33dagrU1@mid.uni-berlin.de>

On Fri, 23 May 2008 07:14:08 -0400, inhahe wrote:

> <purelyacademic>If the GUI defines that it's a board layout like chess or 
> checkers and the player will move around the board, it's hard to say what's 
> left for the "logic" part to do.

The logic part has the rules how you may move the pieces.  The GUI
shouldn't have to know how a knight, bishop, or queen can move or
what castling is.

> I can't think of any generalization for the fact that it's a 2D strategy
> game.  You could have a 2-dimensional array, the size of which is
> determined by the GUI,

No it isn't!  The size is independent from the GUI.  Most 2D strategy
games have maps that are way large than the GUI displays at once.  You
almost always see just a portion of the model of the game world in the GUI.

> but even motion on it would have to be defined by the GUI, in which case
> the GUI would simply be using the "logic" part for storing the array and
> accessing it via index values.  And then there's no reason not to put
> the array inside the GUI.

There are plenty of reasons.  You tie the game to one GUI this way.  No
way to change the GUI toolkit or to split the game into server (game
logic) and client (different GUIs, web application).

Ciao,
	Marc 'BlackJack' Rintsch


From mcsejung at yahoo.com  Fri May  2 09:50:49 2008
From: mcsejung at yahoo.com (mcse jung)
Date: Fri, 2 May 2008 06:50:49 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that writes a
	program?
Message-ID: <732225.29736.qm@web30304.mail.mud.yahoo.com>

Here is asample program that writes a program and then executes it.  
Do you knowof a much simpler way of writing a program that writes a program?
 
"""
-----------------------------------------------------------------------------
Name:        _writePythonCode.py
Purpose:     This script writes Python code and thentransfers control to it.
 
Author:      MCSEJUNG
 
Created:     2008/05/01
RCS-ID:      $Id: _writePythonCode.py $
Copyright:   (c) 2008
Licence:     GPL
   This program is free software; you canredistribute it and/or modify
   it under the terms of the GNU General PublicLicense as published by
   the Free Software Foundation; either version2 of the License
   (at your option) any later version.
 
   This program is distributed in the hope thatit will be useful,
   but WITHOUT ANY WARRANTY; without even theimplied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULARPURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNUGeneral Public License
   along with this program; if not, write tothe Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
Maintenance:MCSEJUNG 2008/05/01 This script writes Python code and then transfers controlto it.
-----------------------------------------------------------------------------
"""
__version__= "$Revision:  80101 $"
# $Source$
 
# Rememberto document each paragraph with a purposeful short description
 
#if__name__ == "__main__":
 
#Print thestart time of this process
import time
start =time.localtime(time.time())
year,month, day, hour, minute, second, weekday, yearday, daylight = start
print"Process Started", "%02d:%02d:%02d" % (hour, minute,second)
 
header1 ="""
-----------------------------------------------------------------------------
Name:        _generatedPython.py
Purpose:     This script was built by_writePythonCode.py
 
Author:      MCSEJUNG
 
Created:     2008/05/01
RCS-ID:      $Id: _generatedPython.py $
Copyright:   (c) 2008
Licence:     GPL
   This program is free software; you canredistribute it and/or modify
   it under the terms of the GNU General PublicLicense as published by
   the Free Software Foundation; either version2 of the License
   (at your option) any later version.
 
   This program is distributed in the hope thatit will be useful,
   but WITHOUT ANY WARRANTY; without even theimplied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULARPURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNUGeneral Public License
   along with this program; if not, write tothe Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
Maintenance:MCSEJUNG 2008/05/01 This script was built by _writePythonCode.py
-----------------------------------------------------------------------------
"""
 
header2 ="""
# $Source$
 
# Rememberto document each paragraph with a purposeful short description
 
#if__name__ == "__main__":
 
#Print thestart time of this process
"""
 
filePathName= 'C:\\Python25\\Lib\\_myStuff'
fileInName= '_generatedPython.py'
filegTName= filePathName + '\\' +fileInName
gT =open(filegTName, 'w')
 
gT.write('"""'+ header1 + '"""' + '\n')
gT.write('__version__= "$Revision:  80101 $"'+ '\n')
gT.write('"""'+ header2 + '"""' + '\n')
gT.write('importtime'+'\n')
gT.write('start= time.localtime(time.time())'+'\n')
gT.write('year,month, day, hour, minute, second, weekday, yearday, daylight = start'+'\n')
gT.write('print"Generated Process Started", "%02d:%02d:%02d" % (hour,minute, second)'+'\n')
#-----------
gT.write('print"start"'+'\n')
gT.write('fori in [0,4,8,12,16,12,8,12,8,12,16,12,8,4,8,12,16,12,8,4,0]:'+'\n')
gT.write('    print "-"*i'+'\n')
gT.write('print"end"'+'\n')
#-----------
gT.write('#Calculatethe processes duration; format and print the start time, stop time, andduration'+'\n')
gT.write('stop= time.localtime(time.time())'+'\n')
gT.write('syear,smonth, sday, shour, sminute, ssecond, sweekday, syearday, sdaylight =stop'+'\n')
gT.write(''+'\n')
gT.write('thour   = shour'+'\n')
gT.write('tminute = sminute'+'\n')
gT.write('tsecond= ssecond'+'\n')
gT.write(''+'\n')
gT.write('iftsecond < second:'+'\n')
gT.write('    tminute = tminute - 1'+'\n')
gT.write('    dursecond = 60 + tsecond - second'+'\n')
gT.write('else:'+'\n')
gT.write('    dursecond = tsecond - second'+'\n')
gT.write(''+'\n')
gT.write('iftminute < minute:'+'\n')
gT.write('    thour = thour - 1'+'\n')
gT.write('   
durminute = 60 + tminute - minute'+'\n')
gT.write('else:'+'\n')
gT.write('   
durminute = tminute - minute'+'\n')
gT.write(''+'\n')
gT.write('ifthour < hour:'+'\n')
gT.write('    xday = 1'+'\n')
gT.write('    durhour = hour - thour'+'\n')
gT.write('else:'+'\n')
gT.write('    xday = 0'+'\n')
gT.write('    durhour = thour - hour'+'\n')
gT.write(''+'\n')
gT.write('ifxday == 0:'+'\n')
gT.write('    print "Generated Process Completed--", "start:", "%02d:%02d:%02d" % (hour, minute,second), "stop:", "%02d:%02d:%02d" % (shour, sminute,ssecond), "duration:", "%02d:%02d:%02d" % (durhour,durminute, dursecond);'+'\n')
gT.write('else:'+'\n')
gT.write('    print "Generated Process Completed--", "start:", "%02d:%02d:%02d" % (hour, minute,second), "stop:", "%02d:%02d:%02d" % (shour, sminute,ssecond), "duration:", "%02d:%02d:%02d" % (durhour,durminute, dursecond), "and one day";'+'\n')
 
gT.flush()
gT.close()
 
execfile("_generatedPython.py")
 
#Calculatethe processes duration; format and print the start time, stop time, andduration
stop =time.localtime(time.time())
syear,smonth, sday, shour, sminute, ssecond, sweekday, syearday, sdaylight = stop
 
thour   = shour
tminute =sminute
tsecond =ssecond
 
if tsecond< second:
    tminute = tminute - 1
    dursecond = 60 + tsecond - second
else:
    dursecond = tsecond - second
 
if tminute< minute:
    thour = thour - 1
    durminute = 60 + tminute - minute
else:
    durminute =tminute - minute
 
if thour< hour:
    xday = 1
    durhour = hour - thour
else:
    xday = 0
    durhour = thour - hour
 
if xday ==0:
    print "Process Completed --",'start:', "%02d:%02d:%02d" % (hour, minute, second), 'stop:',"%02d:%02d:%02d" % (shour, sminute, ssecond), 'duration:',"%02d:%02d:%02d" % (durhour, durminute, dursecond);
else:
    print "Process Completed --",'start:', "%02d:%02d:%02d" % (hour, minute, second), 'stop:',"%02d:%02d:%02d" % (shour, sminute, ssecond), 'duration:',"%02d:%02d:%02d" % (durhour, durminute, dursecond), 'and one day';




      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ


From bearophileHUGS at lycos.com  Sat May 17 08:01:01 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 17 May 2008 05:01:01 -0700 (PDT)
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
Message-ID: <0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>

dave, few general comments to your code:
- Instead of using a comment that explains the meaning of a function,
add such things into docstrings.
- Your names can be improved, instead of f you can use file_name or
something like that, instead of convert_file you can use a name that
denotes that the conversion is already done, etc.
- You can use xrange instead of range and you can indent less, like 4
spaces.
- This line may be slow, you may want to find simpler ways to do the
same thing:
rkey = random.choice(analyze.keys())
- I suggest you to add doctests to all your functions.

Bye,
bearophile


From deets at nospam.web.de  Wed May 21 10:09:47 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 16:09:47 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
	<75ca6227-435c-46bf-8701-aa326d3533e0@p25g2000hsf.googlegroups.com>
	<69in0tF33sdj6U2@mid.uni-berlin.de>
	<07561bbe-0084-467d-b408-a53cfdc8b832@26g2000hsk.googlegroups.com>
Message-ID: <69ioqaF32l8buU1@mid.uni-berlin.de>

cokofreedom at gmail.com wrote:

>>
>> And wastes time. regular expressions can become expensive to match -
>> doing it twice might be hurtful.
>>
>> Diez
> 
> match = (my_re1.match(line) or my_re2.match(line)) or
> my_re3.match(line)

How do you know *which* of the three has matched then?

Diez


From gagsl-py2 at yahoo.com.ar  Tue May 13 06:18:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 07:18:15 -0300
Subject: Some comparison operators gone in Python 3.0?
References: <af84a22c-35cf-4ceb-a359-82abba729745@25g2000hsx.googlegroups.com>
Message-ID: <op.ua278ppex6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 06:34:03 -0300, <wxPythoner at gmail.com> escribi?:

> Is that true that this comparison operators are gone in Python 3.0:
>
> <    (is less than)
>>    (is greater than)
> <= (is less than or equals)
>> = (is greater than or equals)
>
> Is it true?

May I ask *where* did you read that crazy idea?

-- 
Gabriel Genellina



From bbxx789_05ss at yahoo.com  Sat May 17 21:58:25 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 17 May 2008 18:58:25 -0700 (PDT)
Subject: smtplib "authentication required" error
References: 1143858027.337885.24650@j33g2000cwa.googlegroups.com 
	<mailman.1278.1211048201.12834.python-list@python.org>
Message-ID: <86a9a140-733e-46f1-9ca4-fbe32d5c9647@l42g2000hsc.googlegroups.com>

On May 17, 12:18?pm, cher <cheryl.gi... at comcast.net> wrote:
> Hey,
>
> Don't know if you can help, but I'm trying to import archived messages
> from Thunderbird into my gmail account and keep getting these types of
> errors. ?I am using the GML program to help incorporate, but the SMTP
> server is not being recognized by gmail. ?Am I doing something wrong? ?
> Anything else I can try?
> SMTP I've tried:
> ? ? smtp.gmail.com
> ? ? gsmtp56.google.com
>
> Error Val : (530, '5.7.0 Must issue a STARTTLS command first.
> m29sm9416768poh.4',
> *** 76 ERROR SENDING MESSAGE FROM: r... at bassisloadeddj.com
> *** UNABLE TO CONNECT TO SERVER OR SEND MESSAGE. ERROR FOLLOWS.
> Error Type: smtplib.SMTPSenderRefused
> Error Val : (530, '5.7.0 Must issue a STARTTLS command first.
> n22sm9448670pof.3', 'r... at bassisloadeddj.com')
>
> Thanks,
> Cher

Can you get the following program to work?


#Uses gmail to send an email to someone

import smtplib

sender = "Tom"
to = "Sally"
subject = "Test smtplib"

headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (sender, to,
subject)
msg = headers + "Hello.  How are you?"

mailserver = smtplib.SMTP("smtp.gmail.com", 587)
mailserver.ehlo()
mailserver.starttls()
mailserver.ehlo()
mailserver.login("your_gmail_email_address", "your_gmail_password")
mailserver.sendmail("your_gmail_email_addres",
"a_destination_email_address", msg)
mailserver.close()



From exarkun at divmod.com  Wed May 14 09:34:27 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 09:34:27 -0400
Subject: Python and Flaming Thunder
In-Reply-To: <1210762382.6465.3.camel@jcd-desktop>
Message-ID: <20080514133427.6859.1579611234.divmod.quotient.63398@ohm>

On Wed, 14 May 2008 06:53:02 -0400, "J. Clifford Dyer" <jcd at sdf.lonestar.org> wrote:
>On Tue, 2008-05-13 at 10:33 -0700, Dave Parker wrote:
>> > You sound like a commercial.
>>
>> Get Flaming Thunder for only $19.95!  It slices, it dices!
>>
>> > And while programs and libraries written in assembly may be twice as fast
>> > as programs and libraries written in C, ...
>>
>> It's a myth that they're only twice as fast.  An experienced assembly
>> language programmer can usually get out at least a factor of 5 by
>> using tricks such as cache-coherence, carry flag tricks, stack
>> manipulations, etc.
>>
>> > ... they're real hell to maintain.
>>
>> That's also a myth.  For example, if C is easy to maintain, why is
>> Flaming Thunder the only single-asset 8-by-8 shotgun cross compiler in
>> the world?  There should be lots of single-asset 8-by-8 shotgun cross
>> compilers written in C, if C is easier to maintain.
>
>Not only is it the world's only "single-asset 8-by-8 shotgun cross
>compiler," but according to google, it's also the world's only "shotgun
>cross compiler" period.  But I guess if you make up your own terminology
>you're bound to be unique.  :)  Do you mind if I ask: what exactly is a
>single-asset 8x8 shotgun cross compiler, and what makes that of any
>value to me?

The web page explains.  It's a compiler that runs on 8 platforms and can
generate executables for any of them on any of them.  It's not _totally_
clear about what "single-asset" means, but it gives the impression (and
the term somewhat suggests) that this means there's a single executable
that does all of this (compare to gcc's design, where support for cross
compiling to another arch is provided by a separate executable).

"Shotgun" probably just sounds cool.

Jean-Paul


From kyosohma at gmail.com  Thu May 15 11:13:56 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 15 May 2008 08:13:56 -0700 (PDT)
Subject: Problem creating a shorcut
Message-ID: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>

Hi,

I've had this niggling issue from time to time. I want to create a
shortcut on the user's desktop to a website that specifically loads
Firefox even if Firefox is not the default browser.

I usually use COM as it allows very specific settings of the shortcut,
such as the Working Directory and the Target Path. However, the
following will not work for some reason:

<code>

import win32com.client
import winshell

shell = win32com.client.Dispatch('WScript.Shell')
userDesktop = winshell.desktop()

shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
https:\www.myCompanyWebsite.com\auth\preauth.php'
shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
Firefox'
shortcut.save()

</code>

This creates the following target path (which doesn't work):

"C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
\www.myCompanyWebsite.com\auth\preauth.php"

If I leave the website off, it works. If I leave the path to Firefox
out, it works too. Is there another method I can use other than
creating the shortcut by hand and using the shutil module?

Thank you for any ideas.

Mike


From ptmcg at austin.rr.com  Tue May 20 11:58:41 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 20 May 2008 08:58:41 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
Message-ID: <b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>

On May 20, 10:50?am, s0s... at gmail.com wrote:
>
> You don't need all those conditionals. A set differs from a list
> precisely in the fact that each element is unique. And since the
> function is expecting "s" to be an iterable object, it can be
> constructed even without a for loop:
>
> def compress(s):
> ? ? return list(set(s))
>
> That does the trick.
>
>

Only if order does not need to be maintained.  list(set(s)) will not
necessarily keep the unique characters in the order they are seen.
We'll have to check with the OP to see if this is important (I just
assumed that it was because of the use of list comps).

-- Paul


From timr at probo.com  Fri May  9 23:03:13 2008
From: timr at probo.com (Tim Roberts)
Date: Sat, 10 May 2008 03:03:13 GMT
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
References: <fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>	<mailman.643.1210071367.12834.python-list@python.org>	<874p9belo6.fsf@benfinney.id.au>	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>	<4822E485.4040107@aim.com>
	<20080508083323.06a74930.darcy@druid.net>
	<mailman.761.1210251369.12834.python-list@python.org>
Message-ID: <hv3a2493k9b95b3529jgm0cg275g64t1j2@4ax.com>

Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>D'Arcy J.M. Cain wrote:
>> Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
>>   
>>> This is sort of related, but I'm wondering what is different between 
>>> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
>>> thing, since an absolute path is not specified, find 'python' from the 
>>> PATH environment,  I don't really know.
>>
>> Well, I know what happened when I tried it.  What happened when you
>> tried it?
>   
>I haven't tried it but I've seen some files like written that in the 
>past with just a name and no path for some other interpreter (perl or sh 
>probably) and didn't know what the different was or if it was even 
>valid. 

It's not valid.  The shebang line (#!) must specify a full path.  When you
saw the lone word ("perl"), it was probably a /usr/bin/env line, just we
have been discussing.

>I at a windows system now so I can't try it yet.

*IF* you are interested in playing with Linux, most of the distributions
have bootable CDs that will bring up a full Linux environment without ever
touching your hard disk.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From cmgui2 at gmail.com  Sat May 24 01:56:57 2008
From: cmgui2 at gmail.com (cm_gui)
Date: Fri, 23 May 2008 22:56:57 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com>
Message-ID: <5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com>

i am not comparing Python with C or C++ which are of course
compiled languages.

if there is any consolation to Python lovers here, Python is still
faster than Microsoft ASP/ASPX.

i'm not trying to 'troll' here.   it's not just me.
many have complained that python is slow.   python websites are slow.

if python is such a good programming/scripting language,
why can't they build a faster interpreter/compiler engine?
and beat php and zend.
to the python team, rebuild your interpreter!


torontolife.com is slow.

okay, maybe Python is only slightly slower than PHP,
but it APPEARS to be much slower.
there is a distinct waiting time whenever you access a python web page
before the page starts loading.  but once it loads, it is fast.
php page starts loading immediately once you access it,
but you can see the page slowly loading.
because you see the page starts loading immediately, you feel it is
fast.



On May 22, 10:04 am, Mike Driscoll <kyoso... at gmail.com> wrote:
> On May 22, 11:14 am, cm_gui <cmg... at gmail.com> wrote:
>
> >Pythonisslow.    Almost all of the web applications written in
> >Pythonareslow.   Zope/Plone isslow, sloow, so very slooow.  Even
> > Google Apps is not faster.   Neither is Youtube.
> > Facebook and Wikipedia (Mediawiki), written in PHP, are so much faster
> > thanPython.
> > Okay, they probably use caching or some code compilation -- but Google
> > Apps and those Zope sites probably also use caching.
>
> > I've yet to see a web application written inPythonwhich is really
> > fast.
>
> What abouthttp://www.torontolife.com/? It uses Django...
>
> Mike



From castironpi at gmail.com  Wed May 14 14:02:31 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:02:31 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com>
Message-ID: <b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com>

On May 14, 12:51?pm, castiro... at gmail.com wrote:
> On May 14, 5:25?am, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > you can safely ignore its posts.
>
> > > > > How does it generate text?
>
> > > > My guess is by inhaling a lot of intoxicants.
>
> > > However you know what would be helpful? ?If I could go to the right
> > > place to start the ring.
>
> > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> I'd stay on mutability for the world domination factor. ?Fluent
> currency is buoyant currency; turn on a local clock, and someone gets
> some cubic verticals.
>
> Now if sense-reference is trading on the BDFL, I'm still holding Tron
> can pretty well win work.- Hide quoted text -
>
> - Show quoted text -

I have a self-referential on Pygame: it's a Hand Tool object.
Currently, it decays over time.  You said 'flip' in the newsgroup, and
'check', 'cross', and 'mate'.  Now who jumps who?


From arnodel at googlemail.com  Wed May 28 05:16:56 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 28 May 2008 10:16:56 +0100
Subject: UTF-8 and stdin/stdout?
References: <6c543325-b5bf-409a-adf7-eeb8b02582c8@b1g2000hsg.googlegroups.com>
Message-ID: <m2od6q4wl3.fsf@googlemail.com>

dave_140390 at hotmail.com writes:

> Hi,
>
> I have problems getting my Python code to work with UTF-8 encoding
> when reading from stdin / writing to stdout.
>
> Say I have a file, utf8_input, that contains a single character, ?,
> coded as UTF-8:
>
> 	$ hexdump -C utf8_input
> 	00000000  c3 a9
> 	00000002
>
> If I read this file by opening it in this Python script:
>
> 	$ cat utf8_from_file.py
> 	import codecs
> 	file = codecs.open('utf8_input', encoding='utf-8')
> 	data = file.read()
> 	print "length of data =", len(data)
>
> everything goes well:
>
> 	$ python utf8_from_file.py
> 	length of data = 1
>
> The contents of utf8_input is one character coded as two bytes, so
> UTF-8 decoding is working here.
>
> Now, I would like to do the same with standard input. Of course, this:
>
> 	$ cat utf8_from_stdin.py
> 	import sys
> 	data = sys.stdin.read()
> 	print "length of data =", len(data)

Shouldn't you do data = data.decode('utf8') ?

> does not work:
>
> 	$ [/c/DiskCopy] python utf8_from_stdin.py < utf8_input
> 	length of data = 2

-- 
Arnaud



From prisoner_at_war at yahoo.com  Sun May 25 20:26:04 2008
From: prisoner_at_war at yahoo.com (Prisoner at War)
Date: Sun, 25 May 2008 17:26:04 -0700 (PDT)
Subject: Why Turn "Print" into "Print()"????
Message-ID: <de754a7b-9929-472f-ad5b-db9c140bab67@k37g2000hsf.googlegroups.com>


Hi, your friendly neighborhood n00b here, just wondering why on earth
the Py3K folks want to mess with a simple thing like the "print"
"command" (is that what it's called, a command?), turning it into
"print()"...I mean, what's the point, exactly??  To look like a more
"traditional" computer-language format?

And what's with not supporting the so-called softspace "feature" of
the current "print" command, where a space after a comma, like

>>>print "A\n", "B"

outputs

>>>A\nB\n

but with Py3K it will be

>>>print("A\n", "B")

returning

>>>A\n B\n

????

I was all excited to start learning the language, when suddenly I find
out that a new version is slated for release late summer/early fall
this year -- a new version which is not only not backwards-compatible
with previous versions in many important ways, but even when it comes
to a little thing like the "print" command!!

What's up with that??


From vivainio at gmail.com  Fri May  9 03:12:04 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Fri, 9 May 2008 00:12:04 -0700 (PDT)
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
Message-ID: <7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>

On May 8, 8:11 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:

> All these examples assume your regular expression will not span multiple
> lines, but this can easily be the case. How would you process the file
> with regular expressions that span multiple lines?

re.findall/ finditer, as I said earlier.




From upton at virginia.edu  Wed May 21 17:19:47 2008
From: upton at virginia.edu (Dan Upton)
Date: Wed, 21 May 2008 17:19:47 -0400
Subject: Bug in floating-point addition: is anyone else seeing this?
In-Reply-To: <8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
Message-ID: <5504f9ac0805211419j7e7d1926y129316e858048bf@mail.gmail.com>

On Wed, May 21, 2008 at 4:56 PM, Dave Parker
<daveparker at flamingthunder.com> wrote:
> On May 21, 2:44 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
>> My understand is no, not if you're using IEEE floating point.
>
> Yes, that would explain it.  I assumed that Python automatically
> switched from hardware floating point to multi-precision floating
> point so that the user is guaranteed to always get correctly rounded
> results for +, -, *, and /, like Flaming Thunder gives.  Correct
> rounding and accurate results are fairly crucial to mathematical and
> scientific programming, in my opinion.

However, this is not an issue of language correctness, it's an issue
of specification and/or hardware.  If you look at the given link, it
has to do with the x87 being peculiar and performing 80-bit
floating-point arithmetic even though that's larger than the double
spec.  I assume this means FT largely performs floating-point
arithmetic in software rather than using the FP hardware (unless of
course you do something crazy like compiling to SW on some machines
and HW on others depending on whether you trust their functional
units).

The fact is, sometimes it's better to get it fast and be good enough,
where you can use whatever methods you want to deal with rounding
error accumulation.  When accuracy is more important than speed of
number crunching (and don't argue to me that your software
implementation is faster than, or probably even as fast as, gates in
silicon) you use packages like Decimal.

Really, you're just trying to advertise your language again.


From aspersieman at gmail.com  Fri May 16 04:17:51 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Fri, 16 May 2008 10:17:51 +0200
Subject: send yield
In-Reply-To: <054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>
References: <6a19b5bf-ed71-499c-a348-6e26e2f523eb@m45g2000hsb.googlegroups.com>	<mailman.1165.1210861589.12834.python-list@python.org>	<60bc3c8e-b084-47ce-a8d7-16359f17bcbc@a70g2000hsh.googlegroups.com>	<7d37c335-1bac-4318-a3b0-bb0fd67a7a10@8g2000hse.googlegroups.com>
	<0d6e83bd-f6a8-4255-b5e9-d56c31c8e8f5@m45g2000hsb.googlegroups.com>
	<5e7bb9f0-3d3d-4682-b06d-6e2c2e41c214@p25g2000hsf.googlegroups.com>
	<a587c5e3-4b0e-4b2f-b2a6-658233d3ddc0@59g2000hsb.googlegroups.com>
	<054217ee-c8ef-4394-9b70-feba269dc601@m44g2000hsc.googlegroups.com>
Message-ID: <482D432F.6050007@gmail.com>

castironpi wrote:
> On May 15, 7:16 pm, castironpi <castiro... at gmail.com> wrote:
>   
>> On May 15, 6:43 pm, castironpi <castiro... at gmail.com> wrote:
>>
>>
>>
>>
>>
>>     
>>> On May 15, 6:16 pm, castironpi <castiro... at gmail.com> wrote:
>>>       
>>>> On May 15, 4:28 pm, "bruno.desthuilli... at gmail.com"
>>>>         
>>>> <bruno.desthuilli... at gmail.com> wrote:
>>>>         
>>>>> On 15 mai, 16:40, castironpi <castiro... at gmail.com> wrote:
>>>>>           
>>>>>> On May 15, 9:26 am, "Dan Upton" <up... at virginia.edu> wrote:
>>>>>>             
>>>>>>> On Thu, May 15, 2008 at 9:32 AM, castironpi <castiro... at gmail.com> wrote:
>>>>>>>               
>>>>>>>> Why can't I write this?
>>>>>>>> --
>>>>>>>>                 
>>>>>>> Because your antecedent is undefined?
>>>>>>>               
>>>>>> Of the two ways to play, just to say #define this per se would be a
>>>>>> bad move, but that's one that comes from the wrong group.  #define is
>>>>>> a big scary macro, that python hasn't been using; it's the one-line
>>>>>> typo.  Instance:
>>>>>>             
>>>>>> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>>>>>>             
>>>>>> Use it to render planes in solids.
>>>>>>             
>>>>>> Back about 'this', I honestly hadn't remembered 'til this time, when I
>>>>>> got a chance to reread the subject.  Plus I keep ditching my radio.
>>>>>>             
>>>>> Jesus H. Christ. This really sounds like my mother in law. Scary,
>>>>> definitively.- Hide quoted text -
>>>>>           
>>>>> - Show quoted text -
>>>>>           
>>>> Definitely.  But, due, I forgot to complete an example.
>>>>         
>>>>>> #define life1 Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )
>>>>>>             
>>>> in C.  Python:
>>>>         
>>>> life1= 'Tron( drive.SIZE[ 0 ]/ 2, drive.SIZE[ 1 ]/ 2 )'
>>>> exec( life1 )
>>>>         
>>>> Where does it go?- Hide quoted text -
>>>>         
>>>> - Show quoted text -
>>>>         
>>> I'm supposed to talk about an entropy pool game.  You can tunnel.- Hide quoted text -
>>>       
>>> - Show quoted text -
>>>       
>> If I had a send-parachute, would all you need be yield?  Let's drop
>> graphics.- Hide quoted text -
>>
>> - Show quoted text -
>>     
>
> My character is studying chord progressions.  I have right angles.
> I'm on a laptop, and talking in the car is fine.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   
My olive grove gave birth to many world war I biplanes.... I think I 
need more salt.

This thread gave me hope...

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From ervin.ramonllari at hotmail.com  Mon May 19 12:00:30 2008
From: ervin.ramonllari at hotmail.com (ervin.ramonllari at hotmail.com)
Date: Mon, 19 May 2008 18:00:30 +0200
Subject: No subject
Message-ID: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>

Hi there,

I'm trying to install PyGreSQL for python 2.4.
the installation seems to be done correctly, but when I try to import the pgdb module I got the message:
>>> import pgdb
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in -toplevel-
    import pgdb
  File "C:\Python24\Lib\site-packages\pgdb.py", line 69, in -toplevel-
    from _pg import *
ImportError: DLL load failed: The specified module could not be found.

I googled around and I found that the problem could be the libpq.dll file. Then I copied the libpq.dll to the windows directory as well as in the Python dll's directory but the problem is still there.

Please, could someone help me to solve this problem?
Thank you in advance!
Ervin.
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From castironpi at gmail.com  Mon May 12 20:28:06 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 12 May 2008 17:28:06 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.996.1210619207.12834.python-list@python.org>
Message-ID: <b0713742-15d5-4b25-a901-9f92b6f3e61a@34g2000hsh.googlegroups.com>

On May 12, 2:06?pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 11:16:08 -0700 (PDT), petr.po... at gmail.com wrote:
> > [snip]
>
> >My script send me via 3883 port (VRPN) data, but only once. I need
> >listening this port countinously.
> >So I need ?make some loop to print data from 3883 port permanent.
> >Data that I recevied looks liek this:
>
> >receive data from server: 'vrpn: ver. 07.13 ?0\x00\xe8\x0b\x00\x00'
>
> I'm not sure if you need to write a server or a client. ?In your
> original code, you had a client which repeatedly established out-
> bound connections. ?Here, you say you need to listen on a port.
>
>
>
> >Do you think its necessary to use Twisted? Do you have any ideas how
> >to do it with socket modul?
>
> The basic version is pretty easy either way. ?However, with Twisted,
> you get cross-platform error handling without any extra effort, and
> you don't have to think about the boring low-level details of BSD
> sockets.
>
> Here's a Twisted server that listens on port 3883 forever and prints
> the data it receives from each connection after the remote side drops
> the connection:
>
> ? ? from twisted.internet import reactor
> ? ? from twisted.internet.protocol import ServerFactory, Protocol
>
> ? ? class PrintingProtocol(Protocol):
> ? ? ? ? def connectionMade(self):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? When the connection is first established, create a list
> ? ? ? ? ? ? into which to buffer all received data.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? self.received = []
>
> ? ? ? ? def dataReceived(self, data):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? Whenever any data is received on this connection, add it
> ? ? ? ? ? ? to the buffer.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? self.received.append(data)
>
> ? ? ? ? def connectionLost(self, reason):
> ? ? ? ? ? ? """
> ? ? ? ? ? ? When the connection is lost, print out the contents of
> ? ? ? ? ? ? the receive buffer.
> ? ? ? ? ? ? """
> ? ? ? ? ? ? print repr("".join(self.received))
>
> ? ? # Create a factory which will use our protocol to handle incoming
> ? ? # connections.
> ? ? factory = ServerFactory()
> ? ? factory.protocol = PrintingProtocol
>
> ? ? # Listen with it on port 3883
> ? ? reactor.listenTCP(3883, factory)
>
> ? ? # Start the reactor. ?Nothing in this program will ever stop the
> ? ? # reactor, so it will run and accept connections forever.
> ? ? reactor.run()
>
> If you were to use the socket module, then it would look something like this:
>
> ? ? from socket import socket
> ? ? from errno import EINTR
>
> ? ? port = socket()
> ? ? port.bind(('', 3883))
> ? ? port.listen(5)
> ? ? while True:
> ? ? ? ? try:
> ? ? ? ? ? ? server, clientAddr = port.accept()
> ? ? ? ? except socket.error, e:
> ? ? ? ? ? ? print "Error accepting client connection", e
> ? ? ? ? else:
> ? ? ? ? ? ? received = []
> ? ? ? ? ? ? while True:
> ? ? ? ? ? ? ? ? try:
> ? ? ? ? ? ? ? ? ? ? bytes = server.recv(1024 * 16)
> ? ? ? ? ? ? ? ? except socket.error, e:
> ? ? ? ? ? ? ? ? ? ? if e.errno == EINTR:
> ? ? ? ? ? ? ? ? ? ? ? ? continue
> ? ? ? ? ? ? ? ? ? ? else:
> ? ? ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? ? ? if not bytes:
> ? ? ? ? ? ? ? ? ? ? break
> ? ? ? ? ? ? ? ? received.append(bytes)
> ? ? ? ? ? ? print repr("".join(received))
>
> Hope this helps,
>
> Jean-Paul

FWIW, my countrymen!  The above code devotes a resource.  It may be
trivial and/or microscopic, but a computer has them!


From nick at craig-wood.com  Mon May  5 13:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 05 May 2008 12:30:03 -0500
Subject: Script using generators produces different results when invoked
	as a CGI
References: <321422F4B56A9A40953D3A3AB864FB950989DC41@nex1131sfo.us.global.schwab.com>
	<mailman.572.1209969433.12834.python-list@python.org>
Message-ID: <slrng1ufbj.nr7.nick@irishsea.home.craig-wood.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>  En Mon, 05 May 2008 00:31:45 -0300, Barclay, Ken <Ken.Barclay at schwab.com> escribi?:
> 
> > I attended David Beazley's awe-inspiring tutorial on the use of
> > generators in systems programming:
> >http://www.dabeaz.com/generators/
> > <BLOCKED::http://www.dabeaz.com/generators/>
> >I used his approach to write a web tool that can display search results
> > from different log files. But the resulting script produced fewer
> > results when invoked as CGI than it did when run from the command line,
> > and I can't figure out why.
> 
> > Problem: For small sets of files this works great. But when I had 19Meg
> > worth of log files in a test directory, the script would return the
> > correct number of matching lines (288) only when it was invoked directly
> > from the command line. When invoked from a CGI script, it returns 220
> > lines instead
> 
>  No entry in the error log, on the web server? (Apache?)
>  Perhaps you're hitting some internal limit of the cgi process, either memory or cpu time per request or temp file size...
>  Are you sure the script runs to completion? Output a message at the
>  end, to be sure.

Check the ownership of all the files too.  Remember that the web
server (and hence your cgi) will likely run as nobody or www-data.
You are unlikely to be logging in as one of those users.


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mail at timgolden.me.uk  Fri May 16 07:06:25 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 12:06:25 +0100
Subject: Problem creating a shorcut
In-Reply-To: <c550g5-l5f.ln1@darkstargames.dnsalias.net>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<c550g5-l5f.ln1@darkstargames.dnsalias.net>
Message-ID: <482D6AB1.20605@timgolden.me.uk>

Wolfgang Draxinger wrote:
> 1) you should not hardcode the backslashes ('\'), instead use
> os.sep for it.

With respect, the OP is creating a Windows desktop shortcut.
Unless Microsoft suddenly decide to change their use of the 
backslash, I suggest that this is a needless generalisation.

> 3) You assume, that Firefox is always installed at C:\Program
> Files\Mozilla Firefox\firefox.exe
> However the path largely differs from system to system. 

This is broadly true. However, it's fairly clear from the
phrase "the user's desktop" that the OP is working in some
kind of corporate environment where he can be fairly sure
where Firefox is installed by policy. In addition, it's not so
easy to find its path if it's not in the default place since apps 
very rarely add their location to the system PATH these days 
(and Firefox certainly doesn't). You could scan the registry for 
its App Paths entry in the registry but I don't know if any other 
way if it's not  the default browser (which it's clear from the 
original post it  may not be).

Sorry to sound a bit negative, but I felt that a couple of your points, 
while valid, were not altogether helpful to the situation the OP was in.

TJG


From irmen.NOSPAM at xs4all.nl  Mon May 19 14:29:53 2008
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 19 May 2008 20:29:53 +0200
Subject: Newbie: Keep TCP socket open
In-Reply-To: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net>
Message-ID: <4831c722$0$14351$e4fe514c@news.xs4all.nl>


Alan Wright wrote:

> while (num1<=10) :
> 
>  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>  s.settimeout(10.0)
>  s.connect(("10.1.1.69", 50008)) # SMTP
>  print s.recv(1024) + '\n',
>  num1=num1+1
>  #s.close()
> 
> 
> sys.exit(1) 

I think the following is happening:
Reusing the 's' object for every new socket will make Python to garbage
collect the previous ones. Garbage collecting a socket will likely close() it.
Also after creating all sockets your program exits. I guess either Python or the 
operating system itself will go close all the sockets.


Try putting every new socket you make into a big list instead, so that Python can't 
garbage collect it. And put your program to sleep at the end.

import time
allsockets=[]

while (...):
	s=socket.socket(...
	allsockets.append(s)
	s.settimeout(...
	...

time.sleep(99999)



--irmen


From thorsten at thorstenkampe.de  Sat May 17 08:39:09 2008
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 17 May 2008 14:39:09 +0200
Subject: default gettext localedir on windows
References: <e63a7a1c-1aa7-48e8-baa0-96f316914efe@l17g2000pri.googlegroups.com>
	<MPG.22880dee9cc808bf98975c@news.individual.de>
	<6e4b1599-bdbd-4bb1-a104-1f2e8c66b33e@t12g2000prg.googlegroups.com>
Message-ID: <MPG.2298f05cd0e8474198975d@news.individual.de>

* ZeeGeek (Sun, 4 May 2008 10:56:52 -0700 (PDT))
> On May 5, 1:16?am, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> > * ZeeGeek (Sun, 4 May 2008 08:59:05 -0700 (PDT))
> >
> > > Hi, what's the default localedir for gettext module on windows? In
> > > Linux, it's /usr/share/locale. Where should I put the *.mo file in
> > > order to make the translation work?
> >
> > %PYTHONHOME%\share\locale
> 
> I tried moving the *.mo file into %PYTHONHOME%\share\locale\zh_CN
> \LC_MESSAGES, but still no luck. The following is the code snippet I
> use:
> 
> import gettext
> gettext.install('testprogram', unicode = True)

The syntax is correct. Is the test program localised under Linux or 
Cygwin? If not then the error is somewhere in your application.

How did you try to set the language on Windows? It works for me on Vista 
with "set LANG=de" or "set LANGUAGE=de" while I think under XP it had to 
be "set LANG=de_DE" (LANGUAGE or de alone did not work if I remember 
correctly).

Thorsten


From castironpi at gmail.com  Tue May 20 09:53:21 2008
From: castironpi at gmail.com (castironpi)
Date: Tue, 20 May 2008 06:53:21 -0700 (PDT)
Subject: compressing short strings?
References: <7xy7658k8o.fsf_-_@ruckus.brouhaha.com>
	<69fn92F329s6vU2@mid.dfncis.de> 
	<3216e39c-3228-4584-bb1f-916350a23538@i76g2000hsf.googlegroups.com> 
	<aaa0ef8c-e20e-420a-88e0-572c9697b47f@f63g2000hsf.googlegroups.com>
Message-ID: <01edb1b3-033b-4ebb-b042-aa9f8f7b4b47@m45g2000hsb.googlegroups.com>

On May 20, 8:24?am, bearophileH... at lycos.com wrote:
> bearophile:
>
> > So you need to store only this 11 byte long string to be able to
> > decompress it.
>
> Note that maybe there is a header, that may contain changing things,
> like the length of the compressed text, etc.
>
> Bye,
> bearophile

I've read that military texts contain different letter frequencies
than standard English.  If you use a non-QWERTY keyset, it may change
your frequency distribution also.

I worry that this is an impolite question; as such, I lean to peers
for backup:

Will you be additionally adding further entries to the zipped list?

Will you be rewriting the entire file upon update, or just appending
bytes?

If your sequence is 'ab, ab, ab, cd, ab', you might be at:

00010.

Add 'cd' again and you're at:

000101.

You didn't have to re-output the contents.

But, if you add 'bc', you have:

0001012, which isn't in binary.  So you're left at:

000 000 000 001 000 001 010

But five more and the byte overflows.

I'd say pickle the corpus, with new additions, and re-zip the entire
contents each time.  Would you like to break across
(coughdisksectorscough) multiple files, say, a different corpus-
compression file pair for every thousand entries?


From bborcic at gmail.com  Fri May  2 06:02:50 2008
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 02 May 2008 12:02:50 +0200
Subject: get number that is raised to the power of
In-Reply-To: <68057fF2r409aU3@mid.uni-berlin.de>
References: <mailman.446.1209719973.12834.python-list@python.org>
	<68057fF2r409aU3@mid.uni-berlin.de>
Message-ID: <481ae6fd$1_7@news.bluewin.ch>

Marc 'BlackJack' Rintsch wrote:
> On Fri, 02 May 2008 19:19:07 +1000, Astan Chee wrote:
> 
>> Hi,
>> Im not sure if this is more of a math question or a python question. I 
>> have a variable in python:
>>  >>> v = 10.0**n
>> is there a way to find the value of n if i know only v aside from 
>> str(v).split('+')[1] ?

Astan, you could try something like (n for n in range(1,100) if 
10.0**n==v).next() or like len(str(int(v)))-1

>> that seems like too much of a hack and I was 
>> wondering if there was a faster way of doing it?

Faster ?! How fast do you need it to be ?

> 
> That hack isn't even working properly because ``str(10.0**1)`` has no '+'
> in its string representation.

OTOH "%.0e" % (10.0**1) does
...but "%.0e" % (10.0**-1) of course doesn't

> 
> Solution:
> 
> n = math.log(v, 10)
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

Beware of floating point approximations, though. Eg

 >>> assert log(10**3,10)==3

Traceback (most recent call last):
   File "<pyshell#12>", line 1, in <module>
     assert log(10**3,10)==3
AssertionError

Cheers, BB


From gagsl-py2 at yahoo.com.ar  Mon May 26 12:08:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 May 2008 13:08:13 -0300
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
	<e3d1940d-5d6c-4c41-bb85-df2c1fa58542@m73g2000hsh.googlegroups.com>
Message-ID: <op.ubrq3zp7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 26 May 2008 06:14:19 -0300, Paul Boddie <paul at boddie.org.uk> escribi?:

>> I am also bothered a bit by the seeming inconsistency of the rules for
>> the single underscore. When used at file scope, they make the variable
>> or function invisible outside the module, but when used at class
>> scope, the "underscored" variables or functions are still fully
>> visible. For those who claim that the client should be left to decide
>> what to use, why is the client prohibited from using underscored
>> variables at file scope?
>
> I don't remember why this is. I'll leave you to track down the
> rationale for this particular behaviour. ;-)

There is no rationale because this is not how it works...
You can:
- import a module and access *all* of their names, even names prefixed with an underscore
- import any name from a module, even if it starts with an underscore
- import * from a module, and it will import all names listed in __all__, even if they start with an underscore

Only in that last case, and when the module doesn't define __all__, the list of names to be imported is built from all the global names excluding the ones starting with an underscore. And it seems the most convenient default. If one wants to access any "private" module name, any of the first two alternatives will do.

-- 
Gabriel Genellina



From castironpi at gmail.com  Mon May  5 23:28:29 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Mon, 5 May 2008 20:28:29 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com>
Message-ID: <2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com>

On May 5, 1:55?pm, "metaw... at gmail.com" <metaw... at gmail.com> wrote:
> On May 4, 1:11 pm, castiro... at gmail.com wrote:
>
> > There is no such thing as a 'frame' per se in C; byte code is
> > integral. ?As there is no such thing as suspended state without
> > frames, and no such thing as generators without suspended state.
>
> Well, for implementing generators there are alternatives to using
> frames + byte code. In CLPython generators are implemented with
> closures. (Which does not help much when it comes to reimplementing
> generators in C, alas.)
>
> - Willem

There's a process decorator to functions in a module.

[supposes]

@process
def datafile( processdict ):
   processdict.modify( )
   op= yield
   op.call( ) in processdict
   # op.call( ) in namespace

More simply:

@process
def datafile( processdict ):
   processdict.modify( )
   interaction_object= yield
   invoke( interaction_object, processdict )
   #or interaction_object.invoke( **processdict )
   processdict.commit( )

Making each execution of process a self-modifying disk file.
Interaction_object could be binary or text.  If text, we'd have a
cross-language executable, but I'm suspicious it wouldn't be vacuous
as a Python of Python composition: would other languages pass other
than Python programs?

I think relational databases are the only in there.  In other words, I
think Python would make a wholly better stored procedure and query
language than those of databases.  Certainly I'm suspicious that's
naivete speaking up; I question, would it?  Is there more risk of or
opportunity for malicious execution?  Simply put, can we get
primitives in to databases?  What's an example of a [optionally real]
operation on the primitives that doesn't map pretty well into SQL?
How do you want to write base-case scenarios if they're going to be
literals?


From grante at visi.com  Fri May 23 10:11:10 2008
From: grante at visi.com (Grant Edwards)
Date: Fri, 23 May 2008 09:11:10 -0500
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<3J6dnbQZld6PZKjVnZ2dnUVZ_sDinZ2d@comcast.com>
	<g1570j$n8g$1@aioe.org>
Message-ID: <8bmdnURysILjTavVnZ2dnUVZ_vqdnZ2d@posted.visi>

On 2008-05-23, RPM1 <rpm9deleteme at earthlink.net> wrote:
> Larry Bates wrote:
>> If your Python program is slow, you have almost assuredly
>> approached it with a wrong method or algorithm.
>
> I agree for most applications.  There are however times where
> Python just isn't fast enough, and that's usually when people
> write extension modules.

Writing an extension modules is probably pretty far down the
list.  What usually happens is people

 a) Figure out they're using the wrong algorithm

 b) Find the library module that already does the "bottleneck"
    operations. 

-- 
Grant


From xahlee at gmail.com  Wed May 14 19:49:55 2008
From: xahlee at gmail.com (xahlee at gmail.com)
Date: Wed, 14 May 2008 16:49:55 -0700 (PDT)
Subject: generate all possible math expr of one term
Message-ID: <3abbfdf0-7e2a-4171-bbd9-dbb33ea81e6b@w4g2000prd.googlegroups.com>

Here's a example of Expressiveness of a Language.

The following is Mathematica code that generates all possible
equations of one term involving trig function. (tweak the funList and
nesting level to define what ?all possible? means. if nesting level is
2, it takes about 20 minutes and returns a list of 2876 terms on a
2004 personal computer.

<< DiscreteMath`Combinatorica`
funList = {Sin, Tan, Power[#, -1] &};
Nest[Module[{li = #},
 (Union[#, SameTest -> (Module[{arg1 = #1, arg2 = #2},
   If[(*both expression contains both x and y*)
     And @@ (((((StringMatchQ[#, "*x*"] &&
     StringMatchQ[#, "*y*"]) &)@
     ToString@#) &) /@ {arg1, arg2})
     , SameQ[arg1, arg2 /. {x -> y, y -> x}],
     SameQ[arg1, arg2]]
   ] &)] &)@
   Union at Flatten@(Table[(Times @@ # &) /@ KSubsets[#, i], {i, 1,
   2}] &)@Flatten@{li, Outer[#1@#2 &, funList, li]}
 ] &, {x, y}, 1];
Select[%, (StringMatchQ[ToString@#, "*x*"] &&
 StringMatchQ[ToString@#, "*y*"]) &]

The problem is this: generate a list of all possible math expressions
using the following combination and rules:

? the math expression involves both x and y. (must have both present)
? you can use any of the 6 trig functions (you must, since the goal is
to create all possibilities)
? The binary operations you can use are multiply, divide. (no addition
or substraction, since that can make the result 2 terms)
? a sub-expression (such as x or y) can be replaced by a more
complicated one. (i.e. you can nest)

For example, these are first few items from the above code:

{1/(x^2*y^2), 1/(x*y^2), x/y^2, 1/(x*y), x/y, x^2/y, x*y, x^2*y,
x^2*y^2, Cos[x]/y^2, Cos[x]/y, Cos[x]/(x*y), (x*Cos[x])/y, y*Cos[x],
(y*Cos[x])/x, x*y*Cos[x], y^2*Cos[x], Cos[x]*Cos[y], Cot[x]/y^2,
Cot[x]/(x*y^2)}

For a gallery of selection plots of these equations, see
 http://xahlee.org/MathGraphicsGallery_dir/dense/dense1.html

The above i wrote in 2002. If there are requests, i'll translate the
above code into emacs lisp. The result lisp expression should match
Mathematica's, token for token. (the code make a lot use of nested
lambda and or apply and or map) If you are interested, you could
translate the above into lisp too, it's not difficult (though the
number of lines will increase maybe 10 fold. And if Common Lisp
doesn't have combinatorics library providing KSubsets, and also since
CL doesn't have Outer, so the above in CL might be few hundred lines).
(see here for a example of how to: http://xahlee.org/UnixResource_dir/writ/notations.html
)

PS as a after-thought, i decided to post this to perl, python, and
java too. This will take about the same number of lines in perl as in
Common Lisp. Probably llightly more in Python due to syntax. In Java,
it will be one million lines.

Gratuitous poem of the day:

in the climb to geekdom,
you have few rungs to catch,
before you see my ass.

 ?Xah Lee, 2005

  Xah
  xah at xahlee.org
? http://xahlee.org/

?



From raxitsheth2000 at gmail.com  Thu May  8 06:25:17 2008
From: raxitsheth2000 at gmail.com (Raxit@MyKavita.com)
Date: Thu, 8 May 2008 03:25:17 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
Message-ID: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>

Hi,

i was reading/learning some hello world program in python.
I think its very simillar to Java/C++/C#. What's different (except
syntax) ?

what can i do easily with python which is not easy in c++/java !?

Tnx,
Raxit
www.mykavita.com


From nyamatongwe+thunder at gmail.com  Sun May 25 01:49:30 2008
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 25 May 2008 05:49:30 GMT
Subject: finding icons for Apps
In-Reply-To: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
References: <0dc1f496-53b4-44bc-bdf2-3c44b31e2183@c58g2000hsc.googlegroups.com>
Message-ID: <K57_j.4322$IK1.4313@news-server.bigpond.net.au>

Sanoski:
> Where can I find icons to use with my programs?

http://sourceforge.net/projects/icon-collection/

    Neil


From kamhung.soh at gmail.com  Mon May 12 19:23:36 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 13 May 2008 09:23:36 +1000
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<mailman.969.1210575642.12834.python-list@python.org>
	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
Message-ID: <op.ua2dxmx4ev04yd@melwxp23>

On Tue, 13 May 2008 03:42:30 +1000, bruno.desthuilliers at gmail.com  
<bruno.desthuilliers at gmail.com> wrote:

> I just can't believe someone applying for a programmer position cannot
> provide a sensible anwser in 5 or less minutes.

You should join the recruitment and interview panel in your organization  
to test your faith.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From fc14301589 at icqmail.com  Thu May 22 11:16:27 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Thu, 22 May 2008 23:16:27 +0800
Subject: Publish a program
References: <4833f0ff_2@news.tm.net.my>
	<a12e2a30-bb1b-4a4f-9143-9cf4c77e4546@u12g2000prd.googlegroups.com>
	<48342434_2@news.tm.net.my>
	<8242bac2-7bbe-472a-8079-cf249e02e4e8@s21g2000prm.googlegroups.com>
Message-ID: <48359038_2@news.tm.net.my>

On 10:48, gioved? 22 maggio 2008 alex23 wrote:

> Have you thought about putting the full project somewhere like
> http://code.google.com/ ?

Greatly apreciated your suggestion, unfortunately I saw it a bit late ;)

My project is available at http://it.geocities.com/call_me_not_now/index.html

I like if somebody will help me to build a GUI. I've look at Eric but I
didn't feel comfortable with, perhaps BOA or the like would give me the
right tools to build a graphic interface.
I'd like something that for the given shapes/widgets will gives the python
code respectively.




From info at wingware.com  Thu May  8 14:47:03 2008
From: info at wingware.com (Wingware)
Date: Thu, 08 May 2008 14:47:03 -0400
Subject: ANN: Wing IDE 3.1 released
Message-ID: <48234AA7.6060408@wingware.com>

Hi,

Wingware has released version 3.1 of Wing IDE.  The release is available for
all three product levels of Wing IDE and can be found here:

http://wingware.com/downloads

*New Features*

This release adds the following features not found in Wing 3.0.x:

* Support for zip archives
* Support for pkg_resources name spaces and eggs
* Support for doctest and nose style unit tests (*)
* Scan for sys.path changes such as those used in buildout
* How-To and support for Google App Engine
* Inline context appropriate templates/snippets integrated with autocompleter (*)
* Word list driven auto-completion in non-Python files (**)
* Quick navigation to files and symbols by typing a fragment (**)
* Improved support for Stackless Python
* Preference to strip trailing white space on save
* Display gi_running and gi_frame for generators
* Improved code analysis for Python 2.5
* Other minor features and bug fixes not found in Wing 3.0.x

(*)'d items are available in Wing IDE Professional only.  (**)'d items are
available in Wing IDE Personal or Professional only.  Please see the change
log at http://wingware.com/pub/wingide/3.1.0/CHANGELOG.txt for a detailed
list of changes.

*About Wing IDE*

Wing IDE is an integrated development environment for the Python programming
language.  It provides powerful debugging, editing, code intelligence,
testing, and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Wing IDE is available in three product levels:  Wing IDE Professional is
the full-featured Python IDE, Wing IDE Personal offers a reduced feature
set at a low price, and Wing IDE 101 is a free simplified version designed
for teaching entry level programming courses with Python.

System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or
Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit).

*Downloads*

Wing IDE Professional and Wing IDE Personal are commercial software and
require a license to run. A free trial license can be obtained directly from
the product when launched.

Wing IDE Pro 3.1:         http://wingware.com/downloads/wingide/3.1
Wing IDE Personal 3.1:    http://wingware.com/downloads/wingide-personal/3.1
Wing IDE 101 3.1:         http://wingware.com/downloads/wingide-101/3.1

*Purchasing and Upgrading*

Wing 3.1 is a free upgrade for all Wing IDE 3.0 users. Any 2.x license sold
after May 2nd 2006 is free to upgrade; others cost 1/2 the normal price to
upgrade.

Upgrade a 2.x license:    https://wingware.com/store/upgrade
Purchase a 3.x license:   https://wingware.com/store/purchase

Thanks,

-- 

The Wingware Team
Wingware | Python IDE
Advancing Software Development

www.wingware.com



From inhahe at gmail.com  Fri May 23 06:29:14 2008
From: inhahe at gmail.com (inhahe)
Date: Fri, 23 May 2008 06:29:14 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
	<5coZj.13951$hv2.4218@bignews5.bellsouth.net>
	<9e688dbd-43fb-43ca-8c60-8dd2aaa66aa1@x1g2000prh.googlegroups.com>
	<slrng3d2g4.3re.nick@irishsea.home.craig-wood.com>
	<MKwZj.2749$772.668@bignews2.bellsouth.net>
Message-ID: <x_wZj.2757$772.652@bignews2.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:MKwZj.2749$772.668 at bignews2.bellsouth.net...

> if we assume the constraints are that:
> 1.he has list, l
> 2.he has a dictionary, d
> 3.he wants the function to print the values in the dictionary according to 
> a specific order of their keys as defined by the function, followed by the 
> values of the list

It's also possible (even likely) that he knows outside of the function what 
order he wants the values in, and only used an (incidentally) unordered dict 
called kwargs because he thought that's the only way to pass to those 
parameters.  in which case the function could be left untouched and the he 
would call it like this:

args = [1,2,3]
f(*args)
or
f(*[1,2,3])




From wuwei23 at gmail.com  Tue May 27 19:54:46 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 16:54:46 -0700 (PDT)
Subject: maximum recursion depth?
References: <7b55f3e5-b6f6-4c64-992e-47382d7803e7@m44g2000hsc.googlegroups.com>
Message-ID: <4789702b-53fd-490c-b5e2-7b5ff4432e5c@w34g2000prm.googlegroups.com>

On May 28, 9:26 am, globalrev <skanem... at yahoo.se> wrote:
> is there a definitie limit to the nbr of calls or is the memory that
> runs out? is that then the RAMmemory? is there a special amount of
> memory assigned for python or it just takes and takes until windows
> runs out of it?

You can alter the recursion limit using sys.setrecursionlimit:

    setrecursionlimit(n)

    Set the maximum depth of the Python interpreter stack to n.  This
    limit prevents infinite recursion from causing an overflow of the
C
    stack and crashing Python.  The highest possible limit is
platform-
    dependent.


From zerty.david at gmail.com  Sun May 18 13:57:26 2008
From: zerty.david at gmail.com (David Anderson)
Date: Sun, 18 May 2008 14:57:26 -0300
Subject: What's the api tat I should use to connect python to a MS Access Db?
Message-ID: <5dc598e30805181057t30dd2cdau27d7f9264b2be617@mail.gmail.com>

Please answer me the question of the subject =)
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From mensanator at aol.com  Fri May 23 14:03:16 2008
From: mensanator at aol.com (Mensanator)
Date: Fri, 23 May 2008 11:03:16 -0700 (PDT)
Subject: How to print a sorted list as a multi-column table
References: <0628a0f6-d5a5-4629-ae93-3a3bff93eec3@x41g2000hsb.googlegroups.com>
Message-ID: <0ab498fa-7983-4ea0-abcf-cf7f827bd05e@x35g2000hsb.googlegroups.com>

On May 23, 10:30?am, Sverker Nilsson <s... at sncs.se> wrote:
> Hi all,
>
> I would like to ask about opinions about the best way to format sorted
> tables of items for interactive use. I have begun to add interactive
> help to Guppy/Heapy (http://guppy-pe.sourceforge.net) because it lacks
> the usual ways for introspection (see for examplehttp://www.pkgcore.org/trac/pkgcore/doc/dev-notes/heapy.rst) which is
> due to Heapy's use of dynamic things like __getattr__ and to some
> extent properties.
>
> There seems to be no (good or otherwise) way to hook into the standard
> help() (?) (At least not before 2.6 where I recall seeing a __dir__
> magic method may be introduced, but I want it to be backwards
> compatible to at least 2.4, preferably to 2.3.)
>
> So I am about to roll my own help system. It will be based on having
> the API objects supplying a standardized '.help' attribute which can
> be used interactively, and will limit the output it prints to say 15
> or 20 rows at a time.
>
> That's for a background. Now what I was stumbling on which pumped up
> enough adrenalin to make me begin to write this ---
>
> Why are tables formatted like the following, when sorted? (Both in
> linux eg ls, ftp help, and in Python help() when listing (eg)
> modules))
>
> (1)
>
> a ?g ?m ?s
> b ?h ?n ?t
> c ?i ?o ?u
> d ?j ?p ?v
> e ?k ?q
> f ?l ?r

Because it's easier to read when the items have more
than one letter. Have a look at a dictionary.

>
> Wouldn't it be more natural to just sort them like this:
>
> (2)
>
> a ?b ?c ?d
> e ?f ?g ?h
> i ?j ?k ?l
> m ?n ?o ?p
> q ?r ?s ?t
> u ?v

Well, it's certainly easier to program, but ease of
programming often doesn't correlate to ease of use.

>
> What's the rationale for the choice of (1)?

Easier to use although harder to program. Remeber,
the user doesn't care how hard is was for you to
implement.

>
> In a pager, if you want to limit the number of lines output at a time,
> then yo'd see with (1) (if artifically limiting output to 2 lines):
>
> a ?g ?m ?s
> b ?h ?n ?t
>
> So to see the f item you would have to scroll down all the way. ?The
> number of times you would have to scroll down is in completely
> unrelated to the item's position in sort order. That seems to defeat
> the purpose of sorting in the first place. It feels strange, to me at
> least. Anybody had the same feeling?

No.

>
> Well, what's the rationale (if any) for using the layout (1)?
> Wouldn't layout (2) be better? And/or would it be confusing /
> non-pythonic / non-unlixonic if a program used the (2) layout instead?

The obvious solution is to do both, like the DOS directory
command:

c:\python25\user>dir/d
 Volume in drive C has no label.
 Volume Serial Number is D019-C60D

 Directory of c:\python25\user

[.]                                 ken_about_STD.txt
[..]                                ldapart2.py
153.py                              ldas.py
23items.py                          lda_header.py
3n35_ldas.mdb                       legendre.py
3n35_ldas.xls                       long_ago.py
3n_prime.py                         loops_outside_lda.py
5sideddice.xls                      Matlab_useless.py
5_sided_dice.py                     MHtest.py
another_sqlite3_test.py             MHtest2.py
any_good_algo.py                    Minnie_Mouse.txt
attractors023.exe                   mod32.py
attractors025.exe                   mufbuff1.py
attractors_vs_primitiveroots.py     m_version.py

c:\python25\user>dir/w
 Volume in drive C has no label.
 Volume Serial Number is D019-C60D

 Directory of c:\python25\user

[.]                                 [..]
153.py                              23items.py
3n35_ldas.mdb                       3n35_ldas.xls
3n_prime.py                         5sideddice.xls
5_sided_dice.py                     another_sqlite3_test.py
any_good_algo.py                    attractors023.exe
attractors025.exe                   attractors_vs_primitiveroots.py
attractor_test.py                   a_perm_generator.py
bad_doc.py                          base6.py
baseconvert.py                      big_pi_e.py
bits.py                             Book2.xls
buts_in_MH.py                       cc_test.py

>
> Have a (:nice:) weekend :-)
>
> Sverker



From fetchinson at googlemail.com  Wed May 21 21:38:27 2008
From: fetchinson at googlemail.com (Daniel Fetchinson)
Date: Wed, 21 May 2008 18:38:27 -0700
Subject: backport of 'set' to python 2.3?
Message-ID: <fbe2e2100805211838o7028c4b3ie2fd59eebba6d6ff@mail.gmail.com>

Does anyone have a pure python implementation of the builtin 'set'
object so that I could use that in python 2.3? If this would be the
case that would be really great as I wouldn't have to change my code
that runs happily on 2.5 and makes use of 'set'. Speed and performance
doesn't matter, any implementation that does exactly the same as the
builtin 'set' in 2.5 would be great.

Cheers,
Daniel
-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown


From castironpi at gmail.com  Tue May 13 10:52:13 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 07:52:13 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<baeabd42-1edd-4eb0-8481-adc7bdeb6f12@m3g2000hsc.googlegroups.com>
Message-ID: <15a051aa-bc5a-4c7f-be25-693e9bbc40b2@f63g2000hsf.googlegroups.com>

On May 13, 9:45?am, castiro... at gmail.com wrote:
> On May 13, 9:34?am, hdante <hda... at gmail.com> wrote:
>
>
>
>
>
> > On May 13, 10:58?am, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > > On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
>
> > > > > Don't let yourself be irritated by castironpi
>
> > > > I'm not the sort to get irritated by anyone. ?There is value in all
> > > > interaction.
>
> > > Not this interaction, I'm afraid. ?What irritates *me* about
> > > castironpi is that he uses a chatterbot to clutter up the threads
> > > here. ?If you go back to his postings from a year ago (and selected
> > > ones since), his comments are coherent and sensible. ?These rambling
> > > stream-of-consciousness rants about t.v.'s and coffee are (I guess)
> > > his idea of a joke. ?But they are certainly not worth your time in
> > > trying to respond to them.
>
> > > -- Paul
>
> > ?I don't think castironpi so annoying that I should filter its
> > messages. It would be enough if he were better tuned. He is much
> > smarter than the emacs shrink, for example. :-P
>
> > ?The "Flaming Thunder" looks promising, but without being free
> > software, it's unlikely it will create a large developer community,
> > specially considering both free general purpose and scientific
> > programming languages.- Hide quoted text -
>
> > - Show quoted text -
>
> What is a tank a tank of? ?Even if it does, developer communities are
> willing to sustain it. ?That's a pretty colinear judgement, that I
> find the community sustainable. ?Does anyone commute to out of
> control? ?What is to out? ?No jumping down thrown. ?Tut tut.- Hide quoted text -
>
> - Show quoted text -

Now, speaking of thrown: do try-di-di*3es not mean what we're thap
that they used to!

<celebration>


From stef.mientki at gmail.com  Sat May 17 14:54:23 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 17 May 2008 20:54:23 +0200
Subject: multiple databases, what's the best interface ?
Message-ID: <482F29DF.2040804@gmail.com>

hello,

I need to switch fluently between 2 or 3 types of dbases:
SQLite, Sybase ( and in the future MS SQL-server).

I need both closed application and general purpose database manager,
which should run on different platforms (windows, windows mobile, not 
web based).

I would like to write the applications in Python.
What's the best interface so I can use the same program for all databases,
and just have to change the database name, if I want to use another 
database ?

thanks,
Stef Mientki



From mh at pixar.com  Thu May 15 16:47:59 2008
From: mh at pixar.com (mh at pixar.com)
Date: Thu, 15 May 2008 20:47:59 GMT
Subject: call tree tool?
Message-ID: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>

I'm cleaning up some old code, and want to see what orphan
functions might be sitting around.

Is there a static call tree analyzer for python?

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From pball.benetech at gmail.com  Sun May 25 16:22:37 2008
From: pball.benetech at gmail.com (pball.benetech at gmail.com)
Date: Sun, 25 May 2008 13:22:37 -0700 (PDT)
Subject: set partition question
References: <bbdf5bf4-e42c-4ae4-8995-1d45475fa18f@u12g2000prd.googlegroups.com>
	<4839c866$0$32633$9b622d9e@news.freenet.de>
Message-ID: <3b08539b-d4ba-4616-86df-529fceeeef01@q24g2000prf.googlegroups.com>

On May 25, 1:13?pm, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > We can use any operation or function which
> > takes and returns sets.
>
> I think the problem is significantly underspecified. It would be a more
> interesting problem if there was a restriction to a few selected set
> operations, e.g. union, intersection, difference, and combinations
> thereof.

Ok, that's quite right -- when I just tried to define "any function,"
I found that all the solutions I came up with were combinations of the
set operations defined for immutable sets. Let me improve the spec as
the following:

There may be arbitrarily many set elements (denoted by integers
1,2,3,...), arbitrarily many combinations of the elements composing
the sets s_i (s0, s1, ...). We can use any of python's set operations
or combination of those operations.

Thanks for the clarification -- PB.




From fiacre.patrick at gmail.com  Fri May 23 05:53:22 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 05:53:22 -0400
Subject: php vs python
In-Reply-To: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
Message-ID: <48369413$0$25059$607ed4bc@cv.net>

notbob wrote:
> I'm not posting this just to initiate some religious flame war, though it's
> the perfect subject to do so.  No, I actaully want some serious advice about
> these two languages and since I think usenet is the best arena to find it,
> here ya' go.
> 
> So, here's my delimna: I want to start a blog.  Yeah, who doesn't.  Yet, I
> want learn the guts of it instead of just booting up some wordwank or
> whatever.  I started to learn python, but heard php was easier or faster or
> more like shell scripting or... fill in the blank.  Anyway, so I change over
> to learning php.  Then I run across that blog, Coding Horror, and start
> reading articles like this:
> 
> http://www.codinghorror.com/blog/archives/001119.html
> 
> Now what?  Go back to python.  Soldier on with php?  What do I know?  Not
> much.  I can setup mysql and apache,, but don't know how to use 'em, really.
> I use emacs and run slackware and can fumble my way through bash scripts,
> but I can't really write them or do lisp.  I've taken basic basic and basic
> C, but am barely literate in html.  Sometimes it seems overwhelming, but I
> persevere because it's more fun/challenging than video games, which bore me
> to tears.  
> 
> Well, that's my actual question, then.  Is php really so bad I'm just
> wasting my time?  Or is it really the quickest way to blog functionality?
> Would I be better served in the long run learning python, which claims to be
> easy as pie to learn/program (still looks hard to me).  I admit I'm no code
> geek.  But, I'm not completely brain dead, either, and I need something to
> keep my geezer brain sparking.  What say ye?
> 
> nb

Personally, I believe PHP would get you more productive more quickly for 
a blog, but it is a potentially brain damaging language in terms of 
really getting your juices flowing with programming.  It is not a 
general purpose language and suffers from all the limitations of of a 
tool designed for one job.  If you are interested in programming and the 
blog is your path to that, stick with Python!  In particular, immerse 
yourself in mod_python or look at a framework like Django or Pylons -- 
the learning curve is steep for any of these technologies but they are a 
full meal compared to saltine cracker and water of PHP.


From castironpi at gmail.com  Wed May  7 00:08:35 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 21:08:35 -0700 (PDT)
Subject: generator functions in another language
References: <831bea0d-ef71-4ede-9065-3111bce5225e@c65g2000hsa.googlegroups.com>
	<684r62F2rmn3gU2@mid.uni-berlin.de>
	<mailman.513.1209878553.12834.python-list@python.org> 
	<dc8d770a-0478-48ff-bd2c-f530cbfc891c@j22g2000hsf.googlegroups.com> 
	<d8d2609a-1196-4cb3-974a-5c5fc6d3c761@b64g2000hsa.googlegroups.com> 
	<2e3fe05e-2918-4eeb-b67f-94d808afe0d5@d77g2000hsb.googlegroups.com> 
	<2523ca17-c534-44b9-8db7-543a794dc213@e39g2000hsf.googlegroups.com>
Message-ID: <24c3f5d7-46e4-446e-8666-15ccb57c1fab@a1g2000hsb.googlegroups.com>

On May 6, 1:00?pm, hdante <hda... at gmail.com> wrote:
> On May 6, 12:28?am, castiro... at gmail.com wrote:
>
>
>
>
>
>
>
> > There's a process decorator to functions in a module.
>
> > [supposes]
>
> > @process
> > def datafile( processdict ):
> > ? ?processdict.modify( )
> > ? ?op= yield
> > ? ?op.call( ) in processdict
> > ? ?# op.call( ) in namespace
>
> > More simply:
>
> > @process
> > def datafile( processdict ):
> > ? ?processdict.modify( )
> > ? ?interaction_object= yield
> > ? ?invoke( interaction_object, processdict )
> > ? ?#or interaction_object.invoke( **processdict )
> > ? ?processdict.commit( )
>
> > Making each execution of process a self-modifying disk file.
> > Interaction_object could be binary or text. ?If text, we'd have a
> > cross-language executable, but I'm suspicious it wouldn't be vacuous
> > as a Python of Python composition: would other languages pass other
> > than Python programs?
>
> > I think relational databases are the only in there. ?In other words, I
> > think Python would make a wholly better stored procedure and query
> > language than those of databases. ?Certainly I'm suspicious that's
> > naivete speaking up; I question, would it? ?Is there more risk of or
> > opportunity for malicious execution? ?Simply put, can we get
> > primitives in to databases? ?What's an example of a [optionally real]
> > operation on the primitives that doesn't map pretty well into SQL?
> > How do you want to write base-case scenarios if they're going to be
> > literals?
>
> ?Datafiles could be implemented with SQL. Consider SQL:
>
> ?SELECT * FROM process_dict where id = 1
> ?.
> ?SELECT * FROM process_dict where id = 1
>
> ?Obviously, this is all a supposition, I'm not claiming the code is
> perfect (or am I ?). If datafiles could be implemented with SQL and
> storing text requires datafiles, then I can store text with datafiles
> (haha !). Would you consider doing this ? One could even store python
> decorated serialized code using SQL [supposition]. But would it be
> useful [haha !] ?
>
> ?I don't know.- Hide quoted text -
>
> - Show quoted text -

Serialized code has line numbers, which is fine in Python.  (Tab-
indent even comes easier, though it's not clear what granularity
you're storing at, whether each "indention block" gets its own table
or not.)

You are asking for a per-object table.

a= { }
b= [ ]

a[ 'what' ]= object( )

id= new_id( )
process_vars[ id ]= object( )
insert into process_dict.variable_9782 values ( id )
insert into process_dict.variable_9371 values ( 'what', NONPRIMITIVE,
id )

b.append( None )
insert into process_dict.variable_8224 values ( NULL )

b.insert( 0, 0 )
update process_dict.variable_8224 set "column_1"= 0 where index= 0



From ivlenin at gmail.com  Tue May 13 14:36:34 2008
From: ivlenin at gmail.com (I V)
Date: Tue, 13 May 2008 18:36:34 GMT
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
Message-ID: <SclWj.3437$J16.909@newssvr23.news.prodigy.net>

On Mon, 12 May 2008 16:39:25 -0700, Dave Parker wrote:

> I've read that one of the design goals of Python was to create an easy-
> to-use English-like language.  That's also one of the design goals of
> Flaming Thunder at http://www.flamingthunder.com/  , which has proven
> easy enough for even elementary school students, even though it is
> designed for scientists, mathematicians and engineers.

A COBOL for the 21st century! Just what we need.


From upton at virginia.edu  Thu May 15 17:26:19 2008
From: upton at virginia.edu (Dan Upton)
Date: Thu, 15 May 2008 17:26:19 -0400
Subject: call tree tool?
In-Reply-To: <13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
References: <3k1Xj.3430$7k7.2352@flpi150.ffdc.sbc.com>
	<13666537-1237-4165-8f61-780a752a2842@59g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805151426i33d2869fx6da0f03136ada654@mail.gmail.com>

On Thu, May 15, 2008 at 5:19 PM, jay graves <jaywgraves at gmail.com> wrote:
> On May 15, 3:47 pm, m... at pixar.com wrote:
>> I'm cleaning up some old code, and want to see what orphan
>> functions might be sitting around.
>>
>> Is there a static call tree analyzer for python?
>
> How about
> http://pycallgraph.slowchop.com/
>
> ...
> Jay Graves
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Have you checked to see if PyChecker or pylint can help you?
Apparently they can find unused variables at least, I don't know
whether they do functions or not.


From pecora at anvil.nrl.navy.mil  Wed May 28 02:42:06 2008
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Wed, 28 May 2008 08:42:06 +0200
Subject: Hungarian Notation
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<4686e9a0-32bd-4fe6-88b3-bc449bf23206@2g2000hsn.googlegroups.com>
Message-ID: <pecora-85C146.08420628052008@ra.nrl.navy.mil>

In article 
<4686e9a0-32bd-4fe6-88b3-bc449bf23206 at 2g2000hsn.googlegroups.com>,
 Dan Bishop <danb_83 at yahoo.com> wrote:

> On May 27, 12:28?am, "inhahe" <inh... at gmail.com> wrote:
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python? ?Not that I plan to name all my variables with hungarian
> > notation, but just for when it's appropriate.
> 
> pnWe vUse adjHungarian nNotation prepAt nWork, conjAnd pnI vauxDont
> vLike pnIt advVery advMuch.  conjSo pnI vAvoid pnIt prepIn nPython.

HAHAHAHAHAHA! Beautifully done.  Next time I need to diagram a sentence 
I will come to you.  You're the man.  :-)

-- 
-- Lou Pecora


From martin at v.loewis.de  Fri May 30 13:59:24 2008
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 30 May 2008 19:59:24 +0200
Subject: Python 2.5.2 on Ubuntu Hardy Utf-8-Euro error
In-Reply-To: <mailman.1766.1212150318.12834.python-list@python.org>
References: <mailman.1766.1212150318.12834.python-list@python.org>
Message-ID: <4840407c$0$4845$9b622d9e@news.freenet.de>

>> File "/usr/lib/python2.5/site-packages/Dabo-0.8.3-py2.5.egg/dabo/db/dCursorMixin.py", line 281, in execute
>>     sql = unicode(sql, self.Encoding)
>> LookupError: unknown encoding: utf_8_euro
> 
> At the application (DABO) mailing list, they have pointed that this has
> to be a Python issue.

It's definitely not a Python issue.

> As I'm a totally python newbie, I would ask if
> somebody has experimented this kind of error, and if there is any known
> solution. I've found no clue searching at Google right now.

The problem is that self.Encoding is incorrect - it should not be
utf_8_euro. Instead, it should be UTF-8 (or perhaps utf_8). DABO
shouldn't use locale.getdefaultlocale()[1], but
locale.getpreferredencoding().

Regards,
Martin


From cwitts at gmail.com  Wed May  7 10:00:48 2008
From: cwitts at gmail.com (Chris)
Date: Wed, 7 May 2008 07:00:48 -0700 (PDT)
Subject: open filename with spaces in path
References: <fvqmhu$2u1$1@skeeter.ucdavis.edu> <op.uaq89iawev04yd@melwxp23> 
	<3166ab25-5859-4b92-aeaf-6531bcf06382@x41g2000hsb.googlegroups.com> 
	<slrng23be7.rpn.hat@se-162.se.wtb.tue.nl>
Message-ID: <e80e60b8-fab2-498e-b480-f3068d514c12@a1g2000hsb.googlegroups.com>

On May 7, 3:25?pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-07, Chris <cwi... at gmail.com> wrote:
>
> >>>> os.chdir('C:\temp\my test')
> > Traceback (most recent call last):
> > ? File "<input>", line 1, in <module>
> > WindowsError: [Error 123] The filename, directory name, or volume
> > label syntax is incorrect: 'C:\temp\\my test'
>
> Python strings have \ escapes, such as \t, \n etc. Above you try to go to
>
> C:<TAB>emp\my test
>
> and you are lucky that \m is not something special.
>
> Either escape your back slashes ("C:\\temp\\my test") or use raw strings
> (r"C:\temp\my test").
>
> Sincerely,
> Albert

My personal preference is using backslashes, if it's something quick
or if it's something that will be sitting on a server in a dark corner
for a long time to just use os.path.join.  I've had neither of those 2
break on me. ;)


From vlastimil.brom at gmail.com  Wed May  7 09:00:18 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 15:00:18 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
	<9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>
	<18c1e6480805070004t4f067703ka1fcb90a015cce6@mail.gmail.com>
Message-ID: <9fdb569a0805070600h17de678dg87c3dfde013499e9@mail.gmail.com>

Hi David,
thanks for your suggestions.
The mentioned line of code is actually already a part of such
a searching method,  thus it is beeing called in a similar way you
suggested, but anyhow it catched my eye ...;  Thanks for the references to
different markup systems, I haven't known many
of them before - I wish I had found them some moths ago - my searches
were probably too specific.
I'll take a look at it and see, if something could be used or adapted for my
current code.

Greetings,
   Vlasta
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From tal.no.no.spam at gmail.com  Wed May 14 11:24:29 2008
From: tal.no.no.spam at gmail.com (Tal Einat)
Date: Wed, 14 May 2008 08:24:29 -0700 (PDT)
Subject: What's a call-tip to do?
Message-ID: <8885effd-12a6-4e35-9629-ec4028afaa2d@2g2000hsn.googlegroups.com>

Hi all,

I just ran into this. In IDLE (Python 2.5), the call-tip for
itertools.count is:
"x.__init__(...) initializes x; see x.__class__.__doc__ for signature"

That's itertools.count.__init__.__doc__, while itertools.count.__doc__
is the informative doc-string ("DS" henceforth):
"""count([firstval]) --> count object

Return a count object whose .next() method returns consecutive
integers starting from zero or, if specified, from firstval."""


That seems very counter-intuitive to me - I would expect the DS for
__init__ to explain how to use the constructor.

IDLE's call-tip module obviously thinks so as it prefers the __init__
DS to the class's DS. IPython does the opposite as far as I can tell,
when I enter 'itertools.count?' it shows the class's DS, but shows
nothing for a custom class whose __init__ has a DS while the class
itself does not.

I'm wondering what a call-tip mechanism should do when a class and its
__init__ both have a DS. I'd be willing to work up a patch for IDLE's
call-tip module to work better in this regard, or for itertools and
similar classes in the stdlib, if needed.


- Tal Einat
reduce(lambda m,x:[m[i]+s[-1] for i,s in enumerate(sorted(m))],
      [[chr(154-ord(c)) for c in '.&-&,l.Z95193+179-']]*18)[3]


From larry.bates at websafe.com`  Fri May 16 09:09:13 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 08:09:13 -0500
Subject: Problem creating a shorcut
In-Reply-To: <577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>
	<v4CdnTI6fMJiFbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<577a0ed4-afe9-4bd2-8ef9-74d3051bf27b@a1g2000hsb.googlegroups.com>
Message-ID: <CLudna01D6ocGrDVnZ2dnUVZ_u-dnZ2d@comcast.com>

Mike Driscoll wrote:
> On May 15, 2:03 pm, Larry Bates <larry.ba... at websafe.com`> wrote:
>> Mike Driscoll wrote:
>>> Hi,
>>> I've had this niggling issue from time to time. I want to create a
>>> shortcut on the user's desktop to a website that specifically loads
>>> Firefox even if Firefox is not the default browser.
>>> I usually use COM as it allows very specific settings of the shortcut,
>>> such as the Working Directory and the Target Path. However, the
>>> following will not work for some reason:
>>> <code>
>>> import win32com.client
>>> import winshell
>>> shell = win32com.client.Dispatch('WScript.Shell')
>>> userDesktop = winshell.desktop()
>>> shortcut = shell.CreateShortCut(userDesktop + '\\MyShortcut.lnk')
>>> shortcut.Targetpath = r'"C:\Program Files\Mozilla Firefox\firefox.exe"
>>> https:\www.myCompanyWebsite.com\auth\preauth.php'
>>> shortcut.WorkingDirectory = r'C:\Program Files\Mozilla
>>> Firefox'
>>> shortcut.save()
>>> </code>
>>> This creates the following target path (which doesn't work):
>>> "C:\"C:\Program Files\Mozilla Firefox\firefox.exe" https:
>>> \www.myCompanyWebsite.com\auth\preauth.php"
>>> If I leave the website off, it works. If I leave the path to Firefox
>>> out, it works too. Is there another method I can use other than
>>> creating the shortcut by hand and using the shutil module?
>>> Thank you for any ideas.
>>> Mike
>> Either you copied wrong or the problem is:
>>
>> "C:\"C:\Program Files...
>>
>> Note the C:\ is specified twice in the string.  I think it should read:
>>
>>  > "C:\Program Files\Mozilla Firefox\firefox.exe" https:
>>  > \www.myCompanyWebsite.com\auth\preauth.php"
>>
>> -Larry
> 
> Yeah, I know that it's in there twice and that that is the problem.
> But I'm not causing that extra C:\. I run it exactly as above and that
> is what I get for the output. I think it's the COM object. Maybe I
> better just re-post this to the PyWin32 list...
> 
> Thanks,
> 
> Mike

I use Inno Setup on most of my applications and use it to create my desktop, 
quicklaunch and Start shortcuts.  Would that be an option for you?

-Larry


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 26 11:55:54 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 26 May 2008 17:55:54 +0200
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <g1elf9$a0s$01$1@news.t-online.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
	<mailman.1599.1211790412.12834.python-list@python.org>
	<g1elf9$a0s$01$1@news.t-online.com>
Message-ID: <483add88$0$10998$426a74cc@news.free.fr>

Sebastian 'lunar' Wiesner a ?crit :
(snip)
> Django is one of these "MFC type frameworks" 

Actually it's "MVC", not "MFC" !-)



From kyosohma at gmail.com  Thu May 22 13:07:49 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 10:07:49 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
Message-ID: <52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com>

On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
> Hello all, I have written a simple program, and at the end of it,
> instead of it closing I would like it to restart from the beggining.
> Is there a way to do this? Put my code into a class function, or
> something?
> I guess I could do a while loop, but I think if there is a way to run
> my code if it's in a class would be an easier option. I can't seem to
> find many guides online but maybe I have not been looking in the right
> places.
>
> Anybody have any ideas?

Putting your code in a function or class is probably the way to go.
When I was doing C++, we'd just use a while loop for simple stuff,
though.

It really shouldn't be all that hard to tell the code to call up the
beginning of the program again.

Mike


From aisaac at american.edu  Thu May  8 18:07:03 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 22:07:03 GMT
Subject: python vs. grep
In-Reply-To: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
Message-ID: <bQKUj.8781$0L.2506@trnddc07>

Anton Slesarev wrote:
> I've read great paper about generators:
> http://www.dabeaz.com/generators/index.html 
> Author say that it's easy to write analog of common linux tools such 
> as awk,grep etc. He say that performance could be even better. 
> But I have some problem with writing performance grep analog. 


https://svn.enthought.com/svn/sandbox/grin/trunk/

hth,
Alan Isaac


From grante at visi.com  Wed May 21 10:04:02 2008
From: grante at visi.com (Grant Edwards)
Date: Wed, 21 May 2008 09:04:02 -0500
Subject: Struct usage and varying sizes of h, l, etc
References: <48335269.2000809@admailinc.com>
	<mailman.1406.1211324391.12834.python-list@python.org>
Message-ID: <D6udnVPRN5dPtqnVnZ2dnUVZ_qHinZ2d@posted.visi>

On 2008-05-20, Robert Kern <robert.kern at gmail.com> wrote:

>> I'm looking at the struct module for binary packing of ints
>> and floats.  The documentation refers to C datatypes.  It's
>> been many years since I looked at C, but I seem to remember
>> that the data type sizes were not fixed -- for example, an int
>> might be two byes on one machine, and four bytes on the next.
>> Can any C programmers verify this?  If it is true, does that
>> mean that struct.pack('h', 8001) might give me different 
>> results depending on the machine it's running on?
>
> Right. I believe (but could be wrong) that "char" is defined
> to be one byte,

Yes, C defines "char" to be one byte, but it doesn't define the
size of a "byte" other than it's at least big enough to hold
one character (or something like that).  In practice, a byte is
pretty much guaranteed to be at least 8 bits.  But, on some
targets a "byte" is 16 bits, and on others a byte is 32 bits.

However, I'm not aware of any Python implementations on those
targets...

-- 
Grant Edwards                   grante             Yow! Clear the laundromat!!
                                  at               This whirl-o-matic just had
                               visi.com            a nuclear meltdown!!


From goodprada at 126.com  Sat May 10 19:47:25 2008
From: goodprada at 126.com (128)
Date: Sat, 10 May 2008 16:47:25 -0700 (PDT)
Subject: paypal wholesale, NBA,adidas   (  paypal accept    )     (   
	www.honest-shop.cn   )
Message-ID: <0aa875ec-3c66-4a81-886b-1ca92d4c64d9@q24g2000prf.googlegroups.com>

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From marc at stopspam.goldak.ca  Mon May 26 19:32:58 2008
From: marc at stopspam.goldak.ca (Marc Pelletier)
Date: Mon, 26 May 2008 18:32:58 -0500
Subject: graphical ide??
Message-ID: <Xns9AAAB2A395BD7mmpp1234.dd@216.168.3.44>

Hello,

I am just getting started in Python with the intention of tweaking an 
opensource wxPython project called Brewsta. I've been reading python 
documentation and the code, and its starting to make sense, but there seems 
to be an awful lot of boilerplate required to make such an application 
work.

Are there any ides that help out? There seem to be lots of options, and 
I've been downloading like crazy, but nothing so far that stands out. Are 
there any tips or tutorials specific to doing gui development?

cheers

Marc Pelletier


From aguirre.adolfo at gmail.com  Wed May  7 22:11:19 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 19:11:19 -0700 (PDT)
Subject: DISLIN setup: can not open file map0.dat and all the others
Message-ID: <adc30b16-d3f5-4a84-b6d3-5a635fbac3f9@34g2000hsf.googlegroups.com>

I tried reinstalling the program and the DISLIN/PYTHON SETUP window
showed up with the OK button almost covered by the cancel button.

The window is too small so I extend the edges but the superimposed
cancel button still on top.
Using the edge of the OK button I press the arrow there and two
windows are opened:

    * one says: can not open file map0.dat
    * the oher one is the Dislin setup window that shows the anme of
the file ebing called, the path , and a completion type of slider. I
accept the denial of fle map0.dat and one by one every  other file
comes with a denial.

The strange thing is that the DISLIN setup windows are in Spanish. I
wonder if  because this machine has XP in Spanish is confusing the
setup?

Adolfo


From deets at nospam.web.de  Mon May 26 15:38:27 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 May 2008 21:38:27 +0200
Subject: Question about wsgi.input
In-Reply-To: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
References: <t3E_j.50535$7a.33061@bignews1.bellsouth.net>
Message-ID: <6a0htmF35sj8eU1@mid.uni-berlin.de>

inhahe schrieb:
> I'm sorry if this is off-topic, i couldn't find a mailing list OR forum for 
> WSGI (and #wsgi wasn't very helpful).
> 
> i played around with StringIO, and apparently if you write to a stringio the 
> position gets set to the end of the write, so if you read from it again, 
> without using seek, you won't read what comes next, you'll skip to the end 
> of the write.  and if you write without seeking to the end first, you'll 
> overwrite part of the string if the reading hasn't caught up.
> 
> WSGI says that wsgi.input should block if there's more data to be read from 
> the socket, until that data is available. so when the server writes to the 
> file object, what happens to the file position? if i were writing a WSGI 
> app, i would just seek() to the last place my read ended at just to make 
> sure.  but i'm making a server, so i need to know whether i should leave the 
> position at the end of the write, when it blocks (or for that matter, if i'm 
> writing while it's still reading), or at the end of the previous read?

I'm not sure exactly about what you are talking here - but generally, 
wsgi.input should be considerd being a pipe. One (the server) simply 
writes into it. The WSGI-app just reads. No seek.

Diez


From deets at nospam.web.de  Sun May 25 10:53:40 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 16:53:40 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
	<roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>
	<3300da64-ff6b-4c00-9bb4-339d44c9b204@f36g2000hsa.googlegroups.com>
	<f838bc64-a4ef-4770-b139-01284e0f846c@t54g2000hsg.googlegroups.com>
	<roy-BFA66C.10131825052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69tcrnF357g9nU2@mid.uni-berlin.de>

> In fact, from a protocol point of view, some of the types really do depend 
> on each other.  We send counted strings, for example, so we can't send a 
> string until we know how to send an int (for the string length).  If the 
> first test that fails is the string test, I know right off that the problem 
> is not in how we send ints, because that test ran already and it passed.
> 
> Earlier, I gave another example of wanting tests to be run in the same 
> order as some externally controlled set of functional requirements.  Again, 
> not because the tests have inter-dependencies, but because it just makes it 
> easier to interpret the results.
> 
> Don't assume inter-test dependencies (which I agree are a Bad Thing) is the 
> only reason you want to run tests in a specific order.

Both these points can be solved by application of output ordering or 
even better using groups of tests inside individual modules that test 
e.g. basic functionality. Selecting these to run first before trying to 
run more complicated tests is much more senseful than just letting a 
single test run in a determined order.

Diez


From marco at sferacarta.com  Wed May  7 08:37:43 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Wed, 07 May 2008 14:37:43 +0200
Subject: Why don't generators execute until first yield?
In-Reply-To: <Xns9A97897C78229duncanbooth@127.0.0.1>
References: <wdwhcdav7ne.fsf@msc-dt.kom.auc.dk>
	<Xns9A97716C27069duncanbooth@127.0.0.1>
	<wdw63tquzkp.fsf@msc-dt.kom.auc.dk>
	<Xns9A9786AA544CEduncanbooth@127.0.0.1>
	<9chUj.34561$o06.23748@tornado.fastwebnet.it>
	<Xns9A97897C78229duncanbooth@127.0.0.1>
Message-ID: <tohUj.34582$o06.12139@tornado.fastwebnet.it>

Duncan Booth wrote:

> Perhaps if you'd copied all of my code (including the decorator that was 
> the whole point of it)...

Sure, I missed the point. Python's > symbols become quoting levels and 
mess up messages.

Anyway, I would loathe to start execution of a generator before starting 
to iterate through it. Especially when generators are passed around.
The current behavior makes perfect sense.



From ivan.illarionov at gmail.com  Tue May 27 21:42:50 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 01:42:50 +0000 (UTC)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru>
Message-ID: <g1idaq$r5$2@news.mtu.ru>

On Wed, 28 May 2008 01:32:24 +0000, Ivan Illarionov wrote:

> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
> 
>> Greetings, Ivan Illarionov.
>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>> 
>>>> As I've said before - good programmers can write good code in any
>>>> language.
>> 
>>> Yes, they can. But it may be harder to do for them in one language and
>>> easier in another.
>> 
>> It's obvious lie. If you have clear mind and you know language you're
>> using, there are absolutely NOTHING can deny you to write clear code.
>> Even using forth postfix notation, I have no problem writing good code,
>> it's as easy as writing bad code. And yes, I do see the difference.
> 
> No. Language does matter.

I want to add
TROLL WARNING:
this message is cross-posted between comp.lang.python and comp.lang.php
Let's stop.


From castironpi at gmail.com  Wed May 14 18:28:05 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 15:28:05 -0700 (PDT)
Subject: named tuple mutability
References: <dbac98f2-23f0-45c1-a269-cff8c4dbb9fb@27g2000hsf.googlegroups.com>
	<844dc74c-1812-4599-934e-8fb63878b5cf@p25g2000hsf.googlegroups.com> 
	<873aokzgs9.fsf@benfinney.id.au>
Message-ID: <aea52155-79d1-43ba-be28-add2c81e362c@a1g2000hsb.googlegroups.com>

On May 14, 5:01?pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "bruno.desthuilli... at gmail.com" <bruno.desthuilli... at gmail.com> writes:
> > On 14 mai, 18:20, castiro... at gmail.com wrote:
> > > I'm concerned over the future of Python. ?Should tuples be named?
>
> > Obviously not, unless they should.
>
> Clearly they should, unless not.
>
> Ben Finney

I have plenty of uses for them!


From george.sakkis at gmail.com  Sat May  3 02:14:12 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 23:14:12 -0700 (PDT)
Subject: Finally had to plonk google gorups.
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>
	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>
	<87abjne42n.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com> 
	<87r6cncp4r.fsf@physik.rwth-aachen.de>
	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com> 
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com> 
	<mailman.459.1209740061.12834.python-list@python.org>
	<e51360ab-b4bb-451c-bab1-ab3444199768@m45g2000hsb.googlegroups.com>
	<cd597024-8f99-4b69-a691-025d2eafe960@34g2000hsh.googlegroups.com> 
	<7c197680-2a56-44ec-b414-67c72b6a9ce9@d1g2000hsg.googlegroups.com>
Message-ID: <c8551065-59f2-4d04-a4a2-95bbbebc383f@c58g2000hsc.googlegroups.com>

On May 2, 4:49?pm, Mensanator <mensana... at aol.com> wrote:
> On May 2, 2:57?pm, George Sakkis <george.sak... at gmail.com> wrote:
>
>
>
> > On May 2, 1:18 pm, Mensanator <mensana... at aol.com> wrote:
>
> > > On May 2, 9:53 am, Michael Torrie <torr... at gmail.com> wrote:
>
> > > > Shawn Milochik wrote:
> > > > > How does one "plonk" stuff from Google Groups? Specifically, how
> > > > > can this be done in Gmail?
>
> > > > Set up a filter that looks for some phrase in the mail headers that
> > > > identifies messages originating from google groups. ?Gmail's filters are
> > > > fairly flexible. ?I'd probably just have it look for certain words.
> > > > Look at an e-mail's source (raw view) and particularly check in the
> > > > headers for things to filter by.
>
> > > Why don't you just block all messages from Gmail?
>
> > Look up the term "false positive" before you make such brilliant
> > suggestions in the future.
>
> _I_ understand it. Perhaps you should give this advice to the
> ones who suggest blocking Google Groups.

My apologies if you were just being ironic, I took it as a serious
suggestion.

George


From mail2spj at yahoo.com  Mon May 19 11:18:16 2008
From: mail2spj at yahoo.com (SPJ)
Date: Mon, 19 May 2008 08:18:16 -0700 (PDT)
Subject: Running commands on cisco routers using python
Message-ID: <370266.8634.qm@web50101.mail.re2.yahoo.com>

Is it possible to run specific commands on cisco router using Python? 
I have to run command "show access-list" on few hundred cisco routers and get the dump into a file. Please let me know if it is feasible and the best way to achieve this.

Thanks,
SPJ 


      


From larry.bates at websafe.com`  Fri May 16 09:12:49 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Fri, 16 May 2008 08:12:49 -0500
Subject: Dbase / foxpro files
In-Reply-To: <5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
	<v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>
	<5e2b2b21-df6b-475e-94cc-469e7ad810d0@r66g2000hsg.googlegroups.com>
Message-ID: <3ZKdnVuQvcPEFbDVnZ2dnUVZ_jCdnZ2d@comcast.com>

martindesalinas at gmail.com wrote:
> look at
> 
> http://pypi.python.org/pypi?%3Aaction=search&term=dbf&submit=search
> 
> i use dbfpy

That's another option.  The caveat is that dbfpy specifically states that it 
only works on "simple" files.  I'm pretty sure ODBC is universal.

The nice thing about using ODBC is that:

1) Nothing to install, every Windows machine has ODBC
2) If you upgrade to some other ODBC compliant database you have little or no 
changes that are required to your application.

Just my 2 cents.

-Larry


From spamtrap at dot-app.org  Sat May 10 12:26:45 2008
From: spamtrap at dot-app.org (Sherman Pendley)
Date: Sat, 10 May 2008 12:26:45 -0400
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
	<IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>
Message-ID: <m1k5i2rupm.fsf@dot-app.org>

Lew <lew at lewscanon.com> writes:

> You guys are off topic.  None of the million groups to which this
> message was posted are about netiquette.

Netiquette has come up at one point or another in pretty much every
group I've ever read. It's pretty much a universal meta-topic.

sherm--

-- 
My blog: http://shermspace.blogspot.com
Cocoa programming in Perl: http://camelbones.sourceforge.net


From castironpi at gmail.com  Wed May  7 10:07:07 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 7 May 2008 07:07:07 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org>
Message-ID: <64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>

'''
On May 6, 4:43 pm, pyt... at bdurham.com honoring:

>>> a.next( )
( "I", )
>>> a.throw( up )
( "I", "A" )
>>> a.next( )
( "I", "B" )
>>> a.next( )
( "I", "C" )
>>> a.throw( down )
( "II", )
'''

#funny declaration
class up( Exception ): pass
class down( Exception ): pass

def outline( ):
    stack= [ 1 ]
    while 1:
        try:
            yield stack
            stack[ -1 ]+= 1
        except up:
            stack.append( 1 )
        except down:
            stack.pop( -1 )
            stack[ -1 ]+= 1

a= outline( )
print a.next( )
print a.throw( up )
print a.next( )
print a.next( )
print a.throw( down )
print a.throw( up )
print a.throw( up )
print a.next( )
print a.next( )
print a.throw( down )

##output:

[1]
[1, 1]
[1, 2]
[1, 3]
[2]
[2, 1]
[2, 1, 1]
[2, 1, 2]
[2, 1, 3]
[2, 2]

##

cf.

formatter.NullFormatter.format_counter
formatter.NullFormatter.format_letter
formatter.NullFormatter.format_roman


From stef.mientki at gmail.com  Sat May 24 15:32:28 2008
From: stef.mientki at gmail.com (Stef Mientki)
Date: Sat, 24 May 2008 21:32:28 +0200
Subject: Scipy+SQLite crashes... , was:  Re: SQLite import fails sometimes
	?
In-Reply-To: <48381CDF.4090309@gmail.com>
References: <mailman.1520.1211623228.12834.python-list@python.org>	<4837f7d1$1@news.mel.dft.com.au>	<mailman.1523.1211631350.12834.python-list@python.org>
	<48381851$1@news.mel.dft.com.au> <48381CDF.4090309@gmail.com>
Message-ID: <48386D4C.2040405@gmail.com>

hello,

through the scipy group I found a solution (no explanation yet),

  import sqlite3
  from scipy import *

solves the problem.

cheers,
Stef

Stef Mientki wrote:
> John Machin wrote:
>> Stef Mientki wrote:
>>
>>> I don't know if this matters, but I also use sqlite3 from other than 
>>> Python programs.
>>
>> You have an instance of sqlite3.dll in P:\Python\DLLs for use with 
>> Python, and (I guess) you have another instance of sqlite3.dll 
>> somewhere else, for use "from other than Python programs". Are they 
>> the same version? If not, this may be the problem. Start up your 
>> other application, then try to import sqlite3 from Python. If this is 
>> the problem, and you must be able to run both apps simultaneously, 
>> you will probably need to update one or the other.
>>
>> Cheers,
>> John
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> thanks John,
>
> I think I hit the problem, ;-)
> but I don't have a solution yet :-(
>
> After creating the simplest program that did work :
>
> import sqlite3
>
> I started adding every import statement used in my program,
> until the program crashed,
> and here is the simplest program that crashes:
>
> from scipy import *
> import sqlite3
>
> Traceback (most recent call last):
>  File "D:\Data_Python\P24_PyLab_Works\module1.py", line 2, in <module>
>    import sqlite3
>  File "P:\Python\lib\sqlite3\__init__.py", line 24, in <module>
>    from dbapi2 import *
>  File "P:\Python\lib\sqlite3\dbapi2.py", line 27, in <module>
>    from _sqlite3 import *
> ImportError: DLL load failed: Invalid access to memory location.
>
> Any solutions ?
> (btw I need to do the *-import, because I create an easy user 
> environment to do math and physics)
>
> thanks,
> Stef Mientki
>
>



From regnarg at seznam.cz  Sun May 11 04:13:26 2008
From: regnarg at seznam.cz (Filip =?utf-8?B?xaB0xJtkcm9uc2vDvQ==?=)
Date: Sun, 11 May 2008 10:13:26 +0200
Subject: Unimport statement
In-Reply-To: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
References: <e83eccae-516c-4724-a249-23c5434f750d@i76g2000hsf.googlegroups.com>
Message-ID: <20080511081326.GA13843@sirius>

The main problem are references to objects within a module, because
we can NEVER be sure there aren't any, even though we cleaned up
everything, that's just a consequence of Python nature. We can keep
the old objects referenced and it would make an equivalent to the
reload() builting, just without loading the module, in effect the
same as removing it from sys.modules and deleting imported references.
I do not see any possibe clean way to unload a module...

On Ne, kv? 11, 2008 at 10:02:15 +0200, wxPythoner at gmail.com wrote:
> We should have that statement, so that problems, expressed in
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/3bda1fc4895ec886/bc5fe40cfbd10124?lnk=raot#bc5fe40cfbd10124,
> would not occur.




From paddy3118 at googlemail.com  Sun May 18 13:27:37 2008
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 18 May 2008 10:27:37 -0700 (PDT)
Subject: usage of python
References: <bac50564-a924-4a10-a64a-54caf0125b29@8g2000hse.googlegroups.com>
Message-ID: <e8efb125-e9a2-43f8-a0b7-772b2f3543fd@8g2000hse.googlegroups.com>

On May 13, 6:10 pm, Rajarshi <rajarshi.g... at gmail.com> wrote:
> Hi, I teach an introductory programming course in Python. As part of
> the introduction I'd like to highlight theusage of Pythonin
> industry. The idea is to show that there are big players using Python
> for a variety of tasks. Given that the students come from a variety of
> backgrounds and are not necessarily 'hackers', I'm trying to look for
> examples with a bit of wow-factor.
>
> Is there any list with people/groups/companies using Python for
> impressive things?
>
> Any pointers would be appreciated
>
> Thanks,
> Rajarshi

Ciranova uses Python and manages to allow its customers to migrate
their Designs from a proprietary format that dominates the market
using Python: http://www.ciranova.com/index.html

- Paddy.


From castironpi at gmail.com  Tue May 13 07:16:19 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 04:16:19 -0700 (PDT)
Subject: feedparser
References: <2b54d4370805130330m59602387g9f59b3f93097ca3d@mail.gmail.com> 
	<mailman.1044.1210676785.12834.python-list@python.org>
Message-ID: <1a285875-2cfb-49ea-bb5f-2345dc10ccaa@a23g2000hsc.googlegroups.com>

On May 13, 6:06?am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 May 2008 07:30:44 -0300, Mike <42fli... at gmail.com> escribi?:
>
>
>
>
>
> > I'm trying to use the feedparser module (http://www.feedparser.org/).
>
> > Is it possible to use this without running the setup program?
>
> > I don't see why not, seems like I'm missing something obvious.
>
> > My directory structure is:
>
> > myprogram.py
> > ? ? /feedparser
> > ? ? ? ? /feedparser.py
>
> > I know I can install the module in the modules directory but would like ?
> > to
> > avoid this for two reasons: I'm only using it for the one project so ?
> > would
> > like to keep it seperate, and if I move to a shared host I may not be
> > allowed to install additional modules (not sure if this is correct ?
> > though).
>
> The easiest way would be to put the single module feedparser.py in the ?
> same directory as your program (I don't ?completely get your reasons not ?
> to do that). OR put feedparser.py in some other directory that is already ?
> listed in sys.path. OR add the directory containing feedparser.py to ?
> sys.path, just at the beginning of your program.
>
> > I've tried:
>
> > import feedparser
>
> > import feedparser.feedparser
>
> > from feedparser import feedparser
>
> > What am I doing wrong? :)
>
> *IF* the directory 'feedparser' were a package (that is, if it contained a ?
> file __init__.py), then that last import statement would be valid. But I ?
> don't reccomend doing this; you're changing the module's environment.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

The malicious thing to do would be spam Python servers with 'import
Lib' and common locale-specific-language short words for techs: import
biblio, import server--- things we might all want really small-to-zero
numbers of... if in numbers... and such as columns of instancy (the
currency), from the instant of instant message.  So, can you tank my
laptop, or can I go tanking the town?


From yguan08 at gmail.com  Tue May 13 16:27:09 2008
From: yguan08 at gmail.com (yguan08 at gmail.com)
Date: Tue, 13 May 2008 13:27:09 -0700 (PDT)
Subject: help with file path exceeding 255 characters
Message-ID: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>

I have trouble of obtaining the file size of a file because the
fullpath exceeds 255 characters. I get this message with
os.path.getsize(fullpath).

fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
\Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
\Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
\HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"

fsize = os.path.getsize(fullpath)


WindowsError: [Error 206] The filename or extension is too long:

The same thing with os.stat(fullpath).

I tried using the relative path, but it does not work with the message
fname not found.

dir = os.path.dirname(fullpath)
fname = os.path.basename(fullpath)
os.chdir(dir)
filesize = os.path.getsize(fname)

Is there a walk around of this?


From hdante at gmail.com  Fri May  9 10:08:06 2008
From: hdante at gmail.com (hdante)
Date: Fri, 9 May 2008 07:08:06 -0700 (PDT)
Subject: Newbie to python --- why should i learn !
References: <9f5ee6c3-86f7-401a-acc8-cd2c9b059fbd@x19g2000prg.googlegroups.com>
Message-ID: <83493f3d-3b40-4001-ae5a-81ac6a537540@m45g2000hsb.googlegroups.com>

On May 8, 7:25?am, "Ra... at MyKavita.com" <raxitsheth2... at gmail.com>
wrote:
> Hi,
>
> i was reading/learning some hello world program in python.
> I think its very simillar to Java/C++/C#. What's different (except
> syntax) ?

 All the languages have similar "power", in a theoretical sense. If
you can solve a problem with one, most of the time you'll be able to
solve it with the other. So we could say that the languages are
"equal".

 However, in practice, the syntax matters a lot. For example, they
will influence on the maintainability and the performance of your
application.

>
> what can i do easily with python which is not easy in c++/java !?

 Pretty much everything. Python syntax is minimalist, so it requires
much less code. There are many examples in Wikipedia, for example:

 http://en.wikipedia.org/wiki/User_datagram_protocol#Sample_code_.28Python.29
 http://pt.wikipedia.org/wiki/Radix_sort#C.C3.B3digo_em_Java
 http://en.wikipedia.org/wiki/Observer_pattern#Python

 etc.

>
> Tnx,
> Raxitwww.mykavita.com



From notbob at nothome.com  Wed May 21 17:26:43 2008
From: notbob at nothome.com (notbob)
Date: Wed, 21 May 2008 21:26:43 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<vilain-E51950.13561721052008@comcast.dca.giganews.com>
Message-ID: <ns0Zj.203$y_.191@fe091.usenetserver.com>

On 2008-05-21, Michael Vilain <vilain at NOspamcop.net> wrote:

> your site.  They may even have a blogging package you can administer 
> entries without any programming.
>
> What's your end-goal here?  If you can't program, you may be better off 
> with a package or tool that does all the heavy lifting for you.  

I said I didn't want to do that, but that's not entirely true.  I figured
I'd use one of the CMSs while learning how it works, much like linux.  I
hate doing something without knowing why.  Windows and Dreamweaver are good
examples.  Nope.  I want to get under the hood.

nb


From skunkwerk at gmail.com  Thu May  8 18:45:45 2008
From: skunkwerk at gmail.com (skunkwerk)
Date: Thu, 8 May 2008 15:45:45 -0700 (PDT)
Subject: threading - race condition?
Message-ID: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>

i'm getting the wrong output for the 'title' attributes for this
data.  the queue holds a data structure (item name, position, and list
to store results in).  each thread takes in an item name and queries a
database for various attributes.  from the debug statements the item
names are being retrieved correctly, but the attributes returned are
those of other items in the queue - not its own item.  however, the
model variable is not a global variable... so i'm not sure what's
wrong.

i've declared a bunch of worker threads (100) and a queue into which
new requests are inserted, like so:

queue = Queue.Queue(0)
 WORKERS=100
for i in range(WORKERS):
	thread = SDBThread(queue)
	thread.setDaemon(True)
	thread.start()

the thread:

class SimpleDBThread ( threading.Thread ):
   def __init__ ( self, queue ):
		self.__queue = queue
		threading.Thread.__init__ ( self )
   def run ( self ):
		while 1:
			item = self.__queue.get()
			if item!=None:
				model = domain.get_item(item[0])
				logger.debug('sdbthread item:'+item[0])
				title = model['title']
				scraped = model['scraped']
				logger.debug("sdbthread title:"+title)

any suggestions?
thanks


From gagsl-py2 at yahoo.com.ar  Tue May 20 19:24:54 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 May 2008 20:24:54 -0300
Subject: What is wrong with my Python threading?
References: <mailman.1376.1211289568.12834.python-list@python.org>
	<37ac2e29-2ccb-471d-95a5-7afdb49823fa@34g2000hsf.googlegroups.com>
Message-ID: <op.ubg7bslqx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 May 2008 10:28:51 -0300, castironpi <castironpi at gmail.com>  
escribi?:

> You meant 'thd1.start( )' and 'thd2.start( )'.

Wow! A message with a high S/N ratio coming from you!
And it's not the first I've seen - whatever pills you're taking, they're  
good for you...

-- 
Gabriel Genellina



From pm604407 at gmail.com  Sat May 31 00:50:53 2008
From: pm604407 at gmail.com (meg)
Date: Fri, 30 May 2008 21:50:53 -0700 (PDT)
Subject: compatability
References: <62e2b0c6-dc81-494a-b2bd-c6455049ff77@d1g2000hsg.googlegroups.com>
Message-ID: <3b22181c-2308-4fa4-825e-22bc06d6f2fe@u6g2000prc.googlegroups.com>

On May 31, 8:32 am, budcrand... at hotmail.com wrote:
> I'm currently using 3ds Max Design 2009 and Maya. Will Python and
> Plone be compatible with my systems? I would really like to
> incorporate this software. Thank You Bud   budcrand... at hotmail.com.

http://trishafilmactress.blogspot.com/2008/05/modern-trisha.html


From richietommy at yahoo.com  Fri May  2 15:50:46 2008
From: richietommy at yahoo.com (Rich)
Date: Fri, 2 May 2008 12:50:46 -0700 (PDT)
Subject: Help with pyserial and sending binary data?
Message-ID: <721268.64699.qm@web52409.mail.re2.yahoo.com>

Hello,

I am working on a python library for sending and receiving data from a Subaru's ECU (the fuel injection computer) via the OBD-II port and an OBD to USB cable, with the Subaru Select Monitor protocol. There are a few open source programs that do this already (http://romraider.com/ , http://jdash.sourceforge.net/ , http://tari.co.za/downloads/software/source/ ), but they are written in Java or C++. I have never done anything with serial before, and very little with binary data, so this is all new to me. 

The SSM protocol is fairly simple - a request packet (all in binary, represented in hex) consists of a header (0x80), destination byte (0x10 for the ECU), source byte (0xf0 for the diagnostic tool - AKA your computer), Payload length in hex, the Payload, which is one of 6 known commands(0xA0 Read memory, 0xA8 Read single address, 0xB0 Write memory, 0xB8 Write single address, 0xBF ECU init) and addresses or address range, then the checksum byte, which is the 8 least-significant bits of the sum of the rest of the request packet.

A returned packet consists of a header, destination byte (your computer), source byte (ECU), payload size (all data between payload size and checksum byte), and the same checksum byte. Further reading (pretty good documentation on the protocol) is here: http://tari.co.za/downloads/documentation/ssm.pdf , but that is the basics to at least say hi to your car from your computer. 

So I've been messing with it, and in as few lines as possible, this should in theory, send the init command to the ECU (0x80 0x10 0xF0 0x01 0xBF 0x40), and the ECU should return its ID to let you know that you can now chat (something like 0x80 0xF0 0x10 0x39 0xFF 0xA2 0x10 0x0F 0x1B 0x14 0x40 0x05 0x05 0x73 0xFA 0xEB ......):

#--------------------------
import serial, string
output = " "
ser = serial.Serial('/dev/ttyUSB0', 4800, 8, 'N', 1, timeout=1)
ser.write(chr(0x80)+chr(0x10)+chr(0xF0)+chr(0x01)+chr(0xBF)+chr(0x40))
while output != "":
   output = ser.read()
   print hex(ord(output))
#--------------------------

The only problem is that when I send the ECU init command, it just echos back the data I sent it, which, from my understanding, means that I sent an invalid request packet. I'm guessing that there aren't many people on this list with OBD-II subarus and an open port cable ( http://www.tactrix.com/product_info.php?products_id=36 ) that could test this out, but in the off chance there is, perhaps you could help. I've been chatting with the RomRaider developers ( http://www.romraider.com/forum/topic3129.html ) on the subject, but they are Java guys, not Python guys. There is more encompassing code there, but something lies wrong in my basic implementation above.

My best guess I have heard is that chr() isn't encoding the hex value properly to a byte value the ECU understands (wrong endianness?), or chr() encoding isn't always representing hex as an 8-bit byte. chr() should always encode to an 8-bit byte (not 7-bit ASCII or anything, correct)? Is there any way to switch byte endianness, or ensure I am encoding 8-bit bytes? Any help is much appreciated. Thanks!

 -rich



      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ


From hniksic at xemacs.org  Wed May 21 07:47:59 2008
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 21 May 2008 13:47:59 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
Message-ID: <87fxsbzxn4.fsf@mulj.homelinux.net>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid>
writes:

> The canonical solution is to iterate over a list of
> expression,function pairs, ie:

Although that solution is pretty, it is not the canonical solution
because it doesn't cover the important case of "if" bodies needing to
access common variables in the enclosing scope.  (This will be easier
in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
IMHO closer to a canonical solution to this FAQ.


From bj_666 at gmx.net  Fri May 23 17:58:56 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 23 May 2008 21:58:56 GMT
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <69ot10F33dagrU2@mid.uni-berlin.de>

On Fri, 23 May 2008 13:36:55 -0700, davidj411 wrote:

> example of open method on file object:
> fhandle=open(filename).readelines()

Here the name `fhandle` is somewhat misleading.  You don't bind the file
object to that name, but the result of the call of the `readlines()`
method.  Which is a list of lines.  If you would have bound the file
object, you'd observe similar behavior to your CSV reader example.

> example of csv.reader method:
> reader = csv.reader(open(csvfilename))

Because here you are binding the reader object.  Throw in a `list()` to
read all CSV records into a list:

records = list(csv.reader(open(csv_filename)))

In both cases you don't close the file explicitly which might cause
problems.  That CPython closes it for you almost immediately is an
implementation detail.  Other implementations might let those open files
stay open for much longer.

Ciao,
	Marc 'BlackJack' Rintsch


From laurent.ploix at gmail.com  Thu May 29 16:20:08 2008
From: laurent.ploix at gmail.com (=?ISO-8859-1?Q?m=E9choui?=)
Date: Thu, 29 May 2008 13:20:08 -0700 (PDT)
Subject: Python and Flaming Thunder
References: 4bf763f5-33c6-4af5-9075-7de639a54ee1@j33g2000pri.googlegroups.com
Message-ID: <bf0d073d-1877-47b4-88f8-889b706a3b61@r66g2000hsg.googlegroups.com>

On May 28, 11:46 pm, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 28, 3:19 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> > > Kind of like how this year's program won't work on next year's
> > > Python?
>
> > For somebody who has admitted to have only very rudimentary knowledge of
> > python that's a pretty bold statement, don't you think?
>
> Everthing I know, I learned from Wikipedia. ;)
>
> http://en.wikipedia.org/wiki/Python_(programming_language)#Timeline_a...
>
> "Like Perl 6, Python 3.0 will break backward compatibility. There is
> no requirement that Python 2.x code will run unmodified on Python 3.0.
> There are basic changes such as changing the print statement into a
> print function (so any use of the print statement will cause the
> program to fail) ..."

Hi Dave,

Why don't you use your own FT google group to explain why FT is sooooo
much better than other languages (python included). Then you post
__once__ that you started such a conversation, and that's it. I'm sure
all smart developers will have a look and they will all follow you.

The other ones (the ones, including me, who are interested in reading
about python) will keep on having narrow minded conversations about
their favorite snake-oriented language. Poor guys that we are, we
won't even realize how superior you are, how great your language is,
how faster FT is, etc... We will be jobless in no time, and soon you
will have 90% of the language market and make tons of money.

I wish I could be smart enough to realize this. Unfortunately, I'm
just soooo stupid. So please don't steal my brain-cpu cycles, I need
them for better purposes.

Thanks for helping me


From deets at nospam.web.de  Wed May 28 15:26:08 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 May 2008 21:26:08 +0200
Subject: Threads and import
In-Reply-To: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
References: <6d04f375-9cc6-428b-aafb-d5b947d6e915@b1g2000hsg.googlegroups.com>
Message-ID: <6a5pulF36888qU1@mid.uni-berlin.de>

rsoh.woodhouse at googlemail.com schrieb:
> Hi,
> 
> I'm trying to work out some strange (to me) behaviour that I see when
> running a python script in two different ways (I've inherited some
> code that needs to be maintained and integrated with another lump of
> code). The sample script is:
> 
> # Sample script, simply create a new thread and run a
> # regular expression match in it.
> import re
> 
> import threading
> class TestThread(threading.Thread):
> 
>     def run(self):
>         print('start')
>         try:
>             re.search('mmm', 'mmmm')
>         except Exception, e:
>             print e
>         print('finish')
> 
> tmpThread = TestThread()
> tmpThread.start()
> tmpThread.join()
> import time
> for i in range(10):
>     time.sleep(0.5)
>     print i
> 
> # end of sample script
> 
> Now if I run this using:
> 
> $ python ThreadTest.py
> 
> then it behaves as expected, ie an output like:
> 
> start
> finish
> 0
> 1
> 2
> ...
> 
> But if I run it as follows (how the inherited code was started):
> 
> $ python -c "import TestThread"
> 
> then I just get:
> 
> start
> 
> 
> I know how to get around the problem but could someone with more
> knowledge of how python works explain why this is the case?

Works for me. And I don't see any reason why it shouldn't for you - 
unless you didn't show us the actual code.

Diez


From george.sakkis at gmail.com  Mon May 26 17:53:59 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 26 May 2008 14:53:59 -0700 (PDT)
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <83085ff0-df50-4972-840e-6281440b3045@z66g2000hsc.googlegroups.com>

On May 25, 7:25?pm, "xah... at gmail.com" <xah... at gmail.com> wrote:

> For about the past 10 years, i have been concerned in the programing
> community's level of education in social issues.

Yet another great sample of delusional self-importance from the master
of mental masturbation.


From giltay at gmail.com  Wed May 28 15:25:21 2008
From: giltay at gmail.com (giltay at gmail.com)
Date: Wed, 28 May 2008 12:25:21 -0700 (PDT)
Subject: accessing class attributes
References: <5827888d-4e9b-45bd-9361-108714c9043a@m45g2000hsb.googlegroups.com>
Message-ID: <da899680-cd90-4711-8829-a3b0e9af21af@56g2000hsm.googlegroups.com>

On May 28, 12:09 pm, eliben <eli... at gmail.com> wrote:
> Hello,
>
> I have a game class, and the game has a state. Seeing that Python has
> no enumeration type, at first I used strings to represent states:
> "paused", "running", etc. But such a representation has many
> negatives, so I decided to look at the Enum implementation given here:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486
[...]
> Is there any better way, to allow for faster access to this type, or
> do I always have to go all the way ? What do other Python programmers
> usually use for such "enumeration-obvious" types like state ?

I tend to use string constants defined at the module level, e.g.:

##----- in jobclass.py:
# Status indicators
IDLE = 'IDLE'
RUNNING = 'RUNNING'
FINISHED = 'FINISHED'

class Job(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.status = IDLE

    def run(self):
        self.status = RUNNING
        self.do_work()
        self.status = FINISHED
[...]
##----- in another module
job = jobclass.Job()
job.start()
while job.status == jobclass.RUNNING:
    print 'Job is running.'
    time.sleep(SLEEP_SECONDS)
##-----

I've also used dummy objects, eg:

##-----
class RunStatus:
    pass


IDLE = RunStatus()
RUNNING = RunStatus()
FINISHED = RunStatus()
##-----

I've had lots of success with these two methods.  If you think an
enumeration is the most appropriate way, then:

##-----
RunStatuses = Enum('idle', 'running', 'finished')
IDLE = RunStatuses.idle
RUNNING = RunStatuses.running
FINISHED = RunStatuses.finished
##-----

I figure if you're only going to have a few dozen enumeration values,
then don't worry about cluttering up the module namespace with
variable names for constants.

Geoff G-T


From unknown_hero007 at hotmail.com  Fri May  9 07:33:36 2008
From: unknown_hero007 at hotmail.com (Unknown Hero)
Date: Fri, 9 May 2008 04:33:36 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com>
Message-ID: <c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com>

On 9 touko, 12:51, Unknown Hero <unknown_hero... at hotmail.com> wrote:

> Finally managed to get it to work (heh, I was pretty darn lost even
> though I had the best help) but as promised, I'll post my code here
> for those who might be interested in it. The biggest of thanks to Tim
> Golden, who basically walked me step-by-step through this. Most of the
> code is copied from his examples above.
>
> [large piece of code here]
>
> Not the most effecient code, I'm sure, but it does what I want it to
> do :D
>
> Thank you once more, Tim. Also, thank you, Mike, for your advice on
> saving the registry. I would have forgotten to note backing up the
> registry in the beginning if it wasn't for you bringing that up. :D

Hmm... Improving your code is always fun :D but quick fixes to make it
replace search results that contain something more than 'old' here
don't
seem to work.

So I made it command-line, with arguments Hive, old, new.

If I ran the script as registry.py HKEY_LOCAL_MACHINE something
"something else"
and I had made dummy values to the registry like "there is something
here" it
won't update to "there is something else here".

I tried this, can Tim (or someone else) possibly help?

        if type == _winreg.REG_SZ:
          Character = 0
          Correct = 0
          FoundStart = FoundEnd = 0
          Found = False
          for y in range(len(data)):
            if Character < len(old):
              if old[Character] is data[y]:
                Character = Character + 1
                Correct = Correct + 1
          if Correct is len(old):
            Found = True
            Replace = ""
            Character = 0
            for y in range(len(data)):
              if old[0] is data[y]:
                FoundStart = int(y)
                FoundEnd = FoundStart + oldLength
            for y in range(FoundStart):
              Replace = Replace + data[y]

            for y in range(len(new)):
              Replace = Replace + new[y]

            for y in range(FoundEnd, len(data)):
              Replace = Replace + data[y]

          if Found:
            _winreg.SetValueEx (key.key, name, 0, type, data.replace
(old, Replace))


Thanks in advance.


From bj_666 at gmx.net  Mon May 19 15:56:26 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 May 2008 19:56:26 GMT
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
References: <b5a79169-8693-4ff3-8e78-8df09738afaa@b64g2000hsa.googlegroups.com>
Message-ID: <69e4baF2uih6aU1@mid.uni-berlin.de>

On Mon, 19 May 2008 12:39:36 -0700, destroooooy wrote:

> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.

That's wrong.  Use ``==`` and ``!=`` for testing equality/inequality and
``is`` and ``is not`` for identity testing.  And testing for identity is
quite rare.  Rule of thumb: Use it only for known singletons like `None`.

Ciao,
	Marc 'BlackJack' Rintsch


From fred.sells at adventistcare.org  Thu May 29 10:20:41 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Thu, 29 May 2008 10:20:41 -0400
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <483EB1F0.70502@timgolden.me.uk>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0932@acesxch01.ADVENTISTCORP.NET>

please excuse slightly off-topic; cannot access turbogears mailing list at the moment.

There was an excellent video by James Ward that showed using turbogears to return json data to adoble's flex UI.  It simply used

@expose("JSON")
def xxxx():
	...
	return dict(x=1, ...)

Is there any equivalent for xml, such as
@expose("XML")
def ....
	return myElementTreeRoot

I need to have more attribute data (for a grid) than I can cleanly do in json and while pyamf might do the trick, It adds a layer of "magic code" that I cannot sell to my team.  Also with xml and json, I can do my UI design with the url pointing to a test data file, then build the backend to match.

any ideas?

thanks

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From george.sakkis at gmail.com  Thu May  8 02:26:46 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Wed, 7 May 2008 23:26:46 -0700 (PDT)
Subject: The del statement
Message-ID: <02860f2a-cd1d-4b1d-ad49-08b13032ba21@2g2000hsn.googlegroups.com>

One of the few Python constructs that feels less elegant than
necessary to me is the del statement. For one thing, it is overloaded
to mean three different things:
(1) del x: Remove x from the current namespace
(2) del x[i]: Equivalent to x.__delitem__(i)
(3) del x.a: Equivalent to x.__delattr__('a') (or delattr(x,'a'))

(1) is useful, or even necessary, at least as long as there are only
two namespaces (local and global) instead of a separate namespace per
block, so that's ok for now. The other two though, don't justify IMO a
separate statement.

I would strongly prefer (2) to be implemented by a normal method
instead of a special syntax and method. See the inconsistency:
    s = ['a', 'b']
    s.pop(0)
    del s[0]

Likewise for dicts. Why not s.del(0) ? And just in case someone argues
"for the same reason we have __getitem__ and __setitem__", it is not
the same; the syntax for get/set (s[0], s[0] = 'a') doesn't introduce
a new keyword (or overload an existing one), it is pretty intuitive
and used across many languages. As for (3), it is pretty uncommon to
deserve its own syntax; delattr() or directly modifying self.__dict__
are good enough.

I understand that no more proposals are accepted for Python 3 but it
looks like a missed opportunity to make the language a bit simpler and
more consistent. Anyone else have an opinion on this?

George


From d3vvnull at gmail.com  Fri May 30 08:04:27 2008
From: d3vvnull at gmail.com (Michael Mabin)
Date: Fri, 30 May 2008 07:04:27 -0500
Subject: Hungarian Notation
In-Reply-To: <80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
	<80e11ea2-e107-4dae-8ca8-779e143bbae5@p25g2000pri.googlegroups.com>
Message-ID: <170543c70805300504m93e5903w4cee2038214ce75d@mail.gmail.com>

Variable names should have prefixes or suffixes (as I prefer) that represent
the "kind" of data they represent rather than the data type itself.
For example account_bal_am, order_qt, line_ct, first_nm.  Where am is
amount, qt is quantity and ct is count.  Coding standards could impose rules
on datatypes that should be used for these kinds:  am (amount) is a currency
field and should be represented by decimal values. qt (quantity) is a long,
nm a string and so on.

On Fri, May 30, 2008 at 3:31 AM, Lie <Lie.1296 at gmail.com> wrote:

> On May 27, 12:28 pm, "inhahe" <inh... at gmail.com> wrote:
> > Does anybody know of a list for canonical prefixes to use for hungarian
> > notation in Python?  Not that I plan to name all my variables with
> hungarian
> > notation, but just for when it's appropriate.
>
> If it was me, I'd use an empty-defined class:
>
> class Fake(object):
>    pass
>
> data = 'headinfo=trash;headtrash=info'
> Header = Fake()
> Header.Str = data
> Header.Dict = parse(data)
>
> it saves name if it's important (alternatively, you may also use a
> dict or a tuple/list to store the string/dict pair).
> But using Fake class just like that is difficult to work with if I
> need to "write" to the data (not read only) and synchronizes the data,
> in that case, it's easy to extend the Fake Class:
>
> class Fake(object):
>    def __init__(self, data):
>        self.data = parse(data)
>
>    def toStr(self):
>        return str(self.data)
>    def fromStr(self, s):
>        self.data = parse(s)
>    Str = property(toStr, fromStr)
>
>    def toDict(self):
>        return self.data
>    def fromDict(self, s):
>        self.data = s
>    Dict = property(toDict, fromDict)
>
> you might go as far as overriding __str__ and __repr__ as appropriate.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
| _ | * | _ |
| _ | _ | * |
| * | * | * |
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From daveparker at flamingthunder.com  Wed May 28 17:37:36 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 14:37:36 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<Xns9AAC974ABFB89duncanbooth@127.0.0.1>
	<3dd6fa95-e9fe-4922-a46d-020cf9263469@w4g2000prd.googlegroups.com>
	<mailman.1699.1212000527.12834.python-list@python.org>
Message-ID: <b342a56b-3264-466d-9433-261fe86b5d97@l17g2000pri.googlegroups.com>

On May 28, 12:48?pm, "Dan Upton" <up... at virginia.edu> wrote:
> there's no reason "set" itself
> should throw any sort of error in the sense of an exception--in a
> statement like "Set x to SomeFunctionThatCanBlowUp()", the semantics
> should clearly be that the error comes from the function. ?In a simple
> addition statement, that makes no sense.

For example:

  Set z to catch(somefunctionthatmightblowup(...)).
  If catch(set x to y+z.) < 0.1 then go to tinyanswer.

Or something like that.  Or if you change the + to a / and z is 0.0,
for example, then it could cause a divide-by-zero exception.  There is
no guarantee that the + won't cause an exception, given that there is
no guarantee that y and z are both numeric.

> However, I think overloading your catch error types to include objects
> (or integral values, I guess, your example below isn't clear) along
> with real values (ignoring the bit above about whether floating-point
> assignment could throw an error) makes things confusing.

Catch doesn't return just error types or numbers, it can return any
object returned by the statements that are being caught; catch doesn't
care what type they are.  For example:

  Writeline catch(set x to "hello world".).

will write "hello world".

>?It's nice
> that "catch(stuff)" indicates that there's one or more statements
> inside, but so does indentation in Python, bracketing in C/C++,
> Begin/End in <insert language here>, and so forth, ...

Except that in those languages, I don't think that the indentation,
bracketing, Begin/End, etc, can be used in expressions.  Catch can.
For example, catch will return the final value of z:

If catch(Set x to y+z. Set y to x+z.  Set z to 1/(x+y).) < 0.1 then go
to tinyanswer.

>?Beyond that,
> I think you would want a good mechanism for comparing ranges of values
> if you want to make exceptions/errors real-valued.

I am thinking that exceptions/errors should have any kinds of values
the programmer wants to give them.  Some people prefer error numbers,
some prefer error messages, some prefer error identifiers, etc.  I am
thinking that the Error function should simply take a list of whatever
objects the user wants to throw, and throw them.  For example, if the
programmer wanted an error number and an error message for a
particular error:

  If x < 10 then throw error(10, "Please enter a number >= 10").

They could then do something like:

  Set result to catch(funtionthatcouldblowup(...)).
  If result is an error then if result(1) = 10 then writeline
result(2).

Thank you for your comments, they are helping me to clarify my own
thinking on error handling in general and on catch in particular.


From univbgp100 at gmail.com  Mon May 19 00:06:37 2008
From: univbgp100 at gmail.com (univbgp100 at gmail.com)
Date: Sun, 18 May 2008 21:06:37 -0700 (PDT)
Subject: FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO 
	VBScript, SAP - ABAP
Message-ID: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>

##FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP

FREE Tutorials on HTML XHTML CSS JavaScript XML XSL ASP SQL ADO
VBScript, SAP - ABAP visit ebooks.univdatabase.com


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri May  9 07:07:01 2008
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 May 2008 13:07:01 +0200
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com>
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
	<Xns9A9976D7CDC64duncanbooth@127.0.0.1>
	<e3e88105-2532-42ef-86c1-8bd45b63b488@m36g2000hse.googlegroups.com>
Message-ID: <68ipilF2t85d3U1@mid.individual.net>

dmitrey wrote:

> Hmm... I thought this issue is available from Python2.5 only. I
> have no other interpreters in my recently installed KUBUNTU 8.04.

"aptitude install python2.4" helps.

Regards,


Bj?rn

-- 
BOFH excuse #10:

hardware stress fractures



From rossgk at gmail.com  Fri May 16 09:17:42 2008
From: rossgk at gmail.com (RossGK)
Date: Fri, 16 May 2008 06:17:42 -0700 (PDT)
Subject: Pydev Console use vs. stdout/stderr
References: <e21bf45c-85b2-47c4-a748-14a59319f487@34g2000hsf.googlegroups.com>
	<a69110e5-e622-4963-9816-2cc6730090e5@m44g2000hsc.googlegroups.com>
Message-ID: <5d955543-eaf9-4b75-8ad6-1fcf2d4ac430@e53g2000hsa.googlegroups.com>

On May 15, 5:26 pm, s0s... at gmail.com wrote:
> On May 15, 3:12 pm, RossGK <ros... at gmail.com> wrote:
>
> > Just getting used to the PyDev environment in eclipse by playing with
> > a few simple programs. I'm also using wxPython GUI stuff.
>
> >  I've noticed though that simple print commands in my code cause a
> > "wxPython:stdout/stderr" popup window to display any print's I might
> > be dumping out, rather than going to the console in Eclipse.
>
> > Any suggestions of why this is?   Another code example I was looking
> > at (which does not include any wx GUI stuff) has print commands whose
> > result ends up in the Eclipse console, just to further confuse me.
>
> > Is this something that wxPython is imposing on the environment?
>
> Yes, it's wxPython, it does that by default. Pass the keyword argument
> "redirect" set to False to your wx.App object constructor:
>
> app = wx.App(redirect=False)
>
> Or to whatever class you derived from wx.App:
>
> app = ClassDerivingFromWxApp(redirect=False)

Thank you!  That was very helpful, and works fine.

-Ross.


From saluk64007 at gmail.com  Sun May 25 13:17:41 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Sun, 25 May 2008 10:17:41 -0700
Subject: Python web development that resembles PHP or classic ASP
In-Reply-To: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
References: <66a261d8-c31d-4519-beb9-c8913f61a87d@m44g2000hsc.googlegroups.com>
Message-ID: <c3f69bf60805251017r3caede8eld8a61084eb6b2759@mail.gmail.com>

Hi Erik,

As far as I know the only full web framework that works with a primarily
inline style is spyce, which is not currently under active development.  I
used it for a while and it was the first python framework I used.  I think
it's pretty good, if a little bit of an underdog.

That said, using a controller based framework it would be pretty easy to
emulate what you are wanting.  Find a templating language that fits what you
want, build the controller to map to the directories, and pass into
templates all the objects that are needed to interact (response/request
objects etc) and you're set.
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From vivainio at gmail.com  Mon May 26 05:25:53 2008
From: vivainio at gmail.com (Ville Vainio)
Date: Mon, 26 May 2008 02:25:53 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
	<09847cfc-eaec-4adc-8cbf-1e2ebbf940c4@m44g2000hsc.googlegroups.com>
	<a3a1fb3b-901c-417a-9afb-19feacd61abb@q24g2000prf.googlegroups.com>
Message-ID: <64492d8e-532c-4345-863a-c03d87659fe1@79g2000hsk.googlegroups.com>

On May 26, 7:49 am, "Russ P." <Russ.Paie... at gmail.com> wrote:

> I may be full of beans here, but I would like to make a suggestion.
> Why not add a keyword such as "private," and let it be the equivalent
> of "protected" in C++? That would make member variables and functions

Better yet, have '@@foo' be translated to self.__foo. It would cut
some whining about 'self' as well, which would probably make it a more
worthwhile change (private attributes is a feature I don't really care
about much).

Obviously nobody should hold their breath and wait for this to happen.
This is a problem that needs to be solved on API doc generation / IDE
autocompleter layer. If everybody agreed on how to tag published vs.
private methods in docstrings or wherever, we would be mostly set.


From kamhung.soh at gmail.com  Thu May  8 22:09:14 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Fri, 09 May 2008 12:09:14 +1000
Subject: anagram finder / dict mapping question
References: <fvtjek$80a$1@news.xmission.com> <op.uas99gjvev04yd@melwxp23>
	<fvu3rf$je4$1@news.xmission.com> <op.uatraax1ev04yd@melwxp23>
	<g003ol$fi$1@news.xmission.com>
Message-ID: <op.uau6xpl7ev04yd@melwxp23>

On Fri, 09 May 2008 09:52:53 +1000, dave <squareswallower at 1ya2hoo3.net>  
wrote:

> I got it!  Thanks for all your help!!!  Please tell me what you think:
>
> def anafind():
>             fin = open('short.txt')			#one word per line
>             mapdic = {}					#this dic maps letters to anagrams
>             for line in fin:
>                         line = line.strip()
>                         templist = sorted(list(line))	#sort letters
>                         newtlist = (''.join(templist)) 	#join letters
>                         if newtlist not in mapdic:
>                                     mapdic[newtlist] = [line]
>                         if line not in mapdic[newtlist]:
>                                     mapdic[newtlist].append(line)
>             for value in mapdic.values():
>                         if len(value) <= 1:
>                                     pass
>                         else:
>                                     print value
>
>

I avoid creating a temporary variable if it's only used once immediately,  
so I would have written:

newtlist = ''.join(sorted(list(line)))

Looks pretty good, and I found the other tips in parallel responses useful  
to me too!

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>


From nick at craig-wood.com  Fri May 16 09:30:05 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 16 May 2008 08:30:05 -0500
Subject: TPCServer and xdrlib
References: <mailman.1216.1210933005.12834.python-list@python.org>
Message-ID: <slrng2qvki.oe3.nick@irishsea.home.craig-wood.com>

Laszlo Nagy <gandalf at shopzeus.com> wrote:
>  I'm trying to write a multi threaded TPC server. I have used xmlrpc 
>  before for many purposes, but in this case this would not be efficient:
> 
>  - I have to send larger amounts of data, the overhead of converting to 
>  XML and parsing XML back would be too much pain
>  - I have no clue how to do keep-alive with simplexmlrpcserver and it is 
>  slow to open a new connection for each RPC
>  - I would like to do session management (authentication, then store 
>  session info on server site) which is also hard with xmlrpc.
> 
>  I have looked at various solutions including:
> 
>  - PyOrbit - too heavy weight
>  - Pyro - uses pickle, I do not trust it

It is possible to change the serialization used by Pyro

  http://pyro.sourceforge.net/manual/9-security.html#pickle

to the the 'gnosis' XML Pickler.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gagsl-py2 at yahoo.com.ar  Thu May 15 03:56:16 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 04:56:16 -0300
Subject: Custom Classes?
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
	<4dc0cfea0805131110y54381395w3dadb990d3bad6b0@mail.gmail.com>
Message-ID: <op.ua6qz2bpx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 15:10:21 -0300, Victor Subervi  
<victorsubervi at gmail.com> escribi?:

> I remember why I had the number with the getpic. It is because I display
> several of these images on a single page, and apparently I cannot call  
> the
> same script and get more than one image from an HTML page.

That's not true. If you still have the example I posted a few weeks ago,  
you can use this script to show a full listing of all uploaded pictures.  
It's a small variation of album.py.
I think you were saving the pictures on disk - DON'T do that. It's  
unnecesary, wastes time and disk space, and if not done properly one  
request interferes with the other.

-- 
Gabriel Genellina
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From kccnospam at glenevin.com  Mon May 19 13:43:37 2008
From: kccnospam at glenevin.com (seanacais)
Date: Mon, 19 May 2008 10:43:37 -0700 (PDT)
Subject: Using StringVars in  List of Dictionaries as tkInter variables for 
	Scale and Label widgets
Message-ID: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>

I'm trying to build an unknown number of repeating gui elements
dynamically so I need to store the variables in a list of
dictionaries.  I understand that  Scale "variable" name needs to  be a
StringVar  but I cannot figure out how to initialize the dictionary.

I've tried the following code

ps = PowerSupply()		# Instantiate a Power Supply VM Object
numOPs = ps.getOnum()      # Find the number of outputs
OPValues = []			# Global list to hold one dictionary per output

for c in range(numOPs):
	OPValues.append({ })
	ps.initOPValues(c, OPValues[c])



ps.initOPValues is defined as follows:

	def initOPValues(self, OPname, dname):

		OPDefaults = {
			'Vval'  : 0,
			'Ival'  : 0,
			'Otemp' : 0
		}

		dname = dict((d,StringVar()) for d in OPDefaults)
		for d in OPDefaults:
				dname[d].set(OPDefaults[d])

I get the following error:

Traceback (most recent call last):
  File "C:\Code\gui\tkinter.py", line 165, in <module>
    ps.initOPValues(c, OPValues[c])
  File "C:\Code\gui\tkinter.py", line 47, i initOPValues
    dname = dict((d,StringVar()) for d in OPDefaults)
  File "C:\Code\gui\tkinter.py", line 47, in <genexpr>
    dname = dict((d,StringVar()) for d in OPDefaults)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 254, in __init__
    Variable.__init__(self, master, value, name)
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 185, in __init__
    self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'
Exception exceptions.AttributeError: "StringVar instance has no
attribute '_tk'"
 in <bound method StringVar.__del__ of <Tkinter.StringVar instance at
0x00B7D468>> ignored

Any help is appreciated!

Thanks,

Kevin


From eric.hanchrow at gmail.com  Thu May  8 17:03:29 2008
From: eric.hanchrow at gmail.com (offby1)
Date: Thu, 8 May 2008 14:03:29 -0700 (PDT)
Subject: Surprising difference in behavior between "import blah" and "from
	blah import thing"
References: <874p984o4c.fsf@offby1.atm01.sea.blarg.net>
	<mailman.805.1210279049.12834.python-list@python.org>
Message-ID: <88edf8eb-c043-46f3-8ccb-653ffac10703@y18g2000pre.googlegroups.com>

Ah.  So from the point of view of mut.py, "thing" and "system.thing"
are separate, unrelated variables; the former of which is initialized
from the latter when mut says "from system import thing".   Thanks.


From bj_666 at gmx.net  Tue May 20 03:06:39 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 May 2008 07:06:39 GMT
Subject: scaling problems
References: <zImdnZu8bIdH6rDVnZ2dnUVZ8v3inZ2d@posted.plusnet>
	<j07434h1ac489qnnm3l8bmkavg2mbk7er9@4ax.com>
Message-ID: <69fbjvF2uih6aU6@mid.uni-berlin.de>

On Tue, 20 May 2008 10:47:50 +1000, James A. Donald wrote:

> 2.  It is not clear to me how a python web application scales.

Ask YouTube.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From marco at sferacarta.com  Tue May 13 06:26:13 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Tue, 13 May 2008 12:26:13 +0200
Subject: The 'is' identity operator checking immutable values caution
In-Reply-To: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
References: <5353c776-6ef7-4d2f-8769-e3ace320d2c6@b64g2000hsa.googlegroups.com>
Message-ID: <b1eWj.41730$o06.34888@tornado.fastwebnet.it>

wxPythoner at gmail.com wrote:

> We have to avoid the use of the 'is' identity operator with basic,
> immutable values such as numbers and strings.

I'm glad for you. Did you really write checks like "if foo is 27" ?

The point is, you have to learn technologies to use them. It's not like 
technologies learn you (not even in soviet Russia)

> How is with this issue in Python 3.0? Is it fixed?

There is nothing to fix.

> Does Python handle this things properly now?

It always did.


From carsten.haese at gmail.com  Wed May  7 10:30:46 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Wed, 07 May 2008 10:30:46 -0400
Subject: comparing dictionaries
In-Reply-To: <fvsd4o$r6f$1@solaris.cc.vt.edu>
References: <fvsd4o$r6f$1@solaris.cc.vt.edu>
Message-ID: <q2jUj.2758$J16.426@newssvr23.news.prodigy.net>

brad wrote:
> I want to compare two dicts that should have identical info just in a 
> different data structure. The first dict's contents look like this. It 
> is authoritative... I know for sure it has the correct key value pairs:
> 
> {'001' : '01'}
> 
> The second dict's contents are like this with a tuple instead of a 
> string for the key:
> 
> {('This is one', '001'): '01'}

It looks like extracting key[1] from each key of the second dictionary 
should yield the keys of the first dictionary. If that is the case, then 
the following should do it:

d1 = {'001':'01', '002':'02'}
d2 = {('This is one', '001'): '01', ('This is two', '002'): '02'}

if d1 == dict( zip( (k[1] for k in d2.keys()), d2.values() ) ):
     print "They're 'equal'."

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From fred.sells at adventistcare.org  Thu May 29 14:01:41 2008
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Thu, 29 May 2008 14:01:41 -0400
Subject: adobe flex; return xml via turbogears/django
In-Reply-To: <6a7t05F368pqmU1@mid.uni-berlin.de>
Message-ID: <0A53725C4A497848A7B3A0874B259831011B0933@acesxch01.ADVENTISTCORP.NET>

Diez wrote: 
> Why don't you create KID-template like this:
> 
> <div py:strip="True">${root}</div>
> 
> and in the controller say
> 
> @expose("thexmltemplate")
> def ...
>    return dict(root=myElementTreeRoot)
> 
sounds good.  Does that "py:strip" remove the <div> and anything outside it.  I'll be doing a flex style ajax call and it wants just the xml data tree.



From inhahe at gmail.com  Thu May 22 12:40:40 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:40:40 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <olhZj.61432$3v1.5746@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
>
> "inhahe" <inhahe at gmail.com> wrote in message news:...
>> >Ma: Symbolic identity is a mathematical relation
>>>Mb: Symbols are acausal
>>>m: Matter is causal
>>>C: Symbolic identity is not defined on matter.
>>
>
> I do think though that a computer languages claiming operations on 
> 'identity', as vis a vis 'equivalence', is completely contrived, as in, 
> it's just an arbitary distinction about the way in which we're going to 
> compare bits.
>
>

Although I suppose it counts for something that if a is b, in Python, then 
the data referenced (at the end of the chain) by those two names occupies 
the same physical transistors in the RAM module, although that's still a 
level removed in that the so-called identity would change with time as the 
electrical condition in the transistors changes.

But as far as the transistors being physically the same goes, a is b 
actually closely corresponds to vernacular identity by way of "reference vs. 
referent" in the theory of linguistics.





From benjamin.kaplan at case.edu  Fri May 30 09:01:11 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Fri, 30 May 2008 09:01:11 -0400
Subject: how can i stop script from running on login ?
In-Reply-To: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
References: <9f9d35df0805300544x7a8f3af3t2808445edc55de3f@mail.gmail.com>
Message-ID: <ec96e1390805300601k616ea921l616ed3e84ccccf73@mail.gmail.com>

On Fri, May 30, 2008 at 8:44 AM, abhilash pp
<afilash+python at gmail.com<afilash%2Bpython at gmail.com>>
wrote:

> Hi all,
>
> One of my friends played some tricky thing, and now I am in great trouble,
> please help
> Here is the scenario  [windows xp ]:
>
> He wrote one login script and put it on the start program folder under 'All
> Users'
> The script is like this it will issue a log off command when we login; due
> to this I am not able to login to my system even he himself not able to
> access the system and solve the problem. The main thing is the script is of
> '.pyw' type so I can't able to close the CMD window to stop this script
>
> How can I remove that script? Any help will be appreciated, thanks in
> advance
>
> Abhilash
>
>
Try running the machine in safe mode, then delete the script.
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From chris.hulan at gmail.com  Fri May  9 08:38:41 2008
From: chris.hulan at gmail.com (Chris Hulan)
Date: Fri, 9 May 2008 05:38:41 -0700 (PDT)
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <a8fa9609-9ff7-4ee6-82f3-9e8a7c8e1bfa@24g2000hsh.googlegroups.com>

On May 9, 8:25 am, Viktor <alefn... at gmail.com> wrote:
> Can somebody give me an explanation what happened here (or point me to
> some docs)?
>
> Code:
>
> HMMM = None
>
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)
>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
>
> class A:
>     @w
>     def __init__(self): pass
>
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)
>
> Output:
>
> fn: 10404208
> HMMM: 10404208
> wrapper: 10404272
> A.__init__: 10376136
> A.__init__.i: 10404208
> HMMM: 505264624
>
> Why did HMMM changed his id?!

The HMMM inside w is local to that function and is not the same HMMM
that is defined just before w.
Have a look at http://docs.python.org/ref/global.html

cheers


From Magnus.Moraberg at gmail.com  Tue May 27 06:01:30 2008
From: Magnus.Moraberg at gmail.com (Magnus.Moraberg at gmail.com)
Date: Tue, 27 May 2008 03:01:30 -0700 (PDT)
Subject: Extracting text from a Webpage using BeautifulSoup
Message-ID: <426554a3-b635-4f4a-a6d8-f8df17fd56cb@w7g2000hsa.googlegroups.com>

Hi,

I wish to extract all the words on a set of webpages and store them in
a large dictionary. I then wish to procuce a list with the most common
words for the language under consideration. So, my code below reads
the page -

http://news.bbc.co.uk/welsh/hi/newsid_7420000/newsid_7420900/7420967.stm

a welsh language page. I hope to then establish the 1000 most commonly
used words in Welsh. The problem I'm having is that
soup.findAll(text=True) is returning the likes of -

u'doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://
www.w3.org/TR/REC-html40/loose.dtd"'

and -

<a href=" \'+url+\'?rss=\'+rssURI+\'" class="sel"

Any suggestions how I might overcome this problem?

Thanks,

Barry.


Here's my code -

import urllib
import urllib2
from BeautifulSoup import BeautifulSoup

# proxy_support = urllib2.ProxyHandler({"http":"http://
999.999.999.999:8080"})
# opener = urllib2.build_opener(proxy_support)
# urllib2.install_opener(opener)

page = urllib2.urlopen('http://news.bbc.co.uk/welsh/hi/newsid_7420000/
newsid_7420900/7420967.stm')
soup = BeautifulSoup(page)

pageText = soup.findAll(text=True)
print pageText



From deets at nospam.web.de  Sun May 18 11:35:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 17:35:32 +0200
Subject: Get all the instances of one class
In-Reply-To: <24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
References: <29f39184-2daa-49fc-a7af-7f869fd2d688@h1g2000prh.googlegroups.com>
	<mailman.1259.1210983251.12834.python-list@python.org>
	<24267a4f-1406-42c2-bffc-f1ccd64f0218@w34g2000prm.googlegroups.com>
Message-ID: <69b0mlF31f0kbU1@mid.uni-berlin.de>

Terry schrieb:
> On May 17, 8:04 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Fri, 16 May 2008 20:44:00 -0300, Terry <terry.yin... at gmail.com>
>> escribi?:
>>
>>> Is there a simple way to get all the instances of one class? I mean
>>> without any additional change to the class.
>> Try with gc.get_referrers()
>>
>> py> import gc
>> py> class A(object): pass
>> ...
>> py> a,b,c = A(),A(),A()
>> py> A
>> <class __main__.A at 0x00A3F4E0>
>> py> for item in gc.get_referrers(A): print type(item)
>> ...
>> <type 'getset_descriptor'>
>> <type 'getset_descriptor'>
>> <type 'tuple'>
>> <class '__main__.A'>
>> <class '__main__.A'>
>> <class '__main__.A'>
>> <type 'dict'>
>> <type 'dict'>
>>
>> We need to filter that list, keeping only A's instances:
>>
>> py> [item for item in gc.get_referrers(A) if isinstance(item,A)]
>> [<__main__.A object at 0x00A40DC8>, <__main__.A object at 0x00A40DF0>,
>> <__main__.A object at 0x00A40E18>]
>>
>> --
>> Gabriel Genellina
> 
> But I saw in the help that we should "Avoid using get_referrers() for
> any purpose other than debugging. "

Yes, because using it do is very resource-consuming and shouldn't be 
done. Why don't you tell us what you are after here & then we might come 
up with a better solution?

Diez


From notbob at nothome.com  Mon May 12 13:56:10 2008
From: notbob at nothome.com (notbob)
Date: Mon, 12 May 2008 17:56:10 GMT
Subject: Learning Python for no reason
References: <0383f3b8$0$27282$c3e8da3@news.astraweb.com>
Message-ID: <_w%Vj.9941$Qw5.889@fe107.usenetserver.com>

On 2008-05-12, John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> language, I can't help but feel that I will be mostly unable to use what I 
> learn simply because I have no reason to use it.

> The *process* of learning is enough fun for me, and every now and then I do 
> find a small use for Python that really pays off,

You're contradicting yourself.  Which is it?  You can or can't use it?  

I suspect the more you learn of it, the more you will be able to do with it.  I
hope so, as I'm just doing it now, like you, for the sake of learning.  

nb


From bbxx789_05ss at yahoo.com  Fri May  2 04:34:54 2008
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 2 May 2008 01:34:54 -0700 (PDT)
Subject: where do I begin with web programming in python?
References: <37ea096e-cf3e-4932-8370-306a15a2aebd@25g2000hsx.googlegroups.com>
Message-ID: <a9e90fad-ac75-4025-8eb5-cdfa0c644698@a70g2000hsh.googlegroups.com>

On May 1, 3:25?pm, jmDesktop <needin4mat... at gmail.com> wrote:
> I have been to the main python site, but am still confused. ?I have
> been using .net, so it may be obvious how to do this to everyone
> else. ?I am aware there are various frameworks (Django, Pylons, etc.),
> but I would like to know how to create web pages without these. ?If I
> have mod_python or fastcgi on apache, where do I start? ?I don't have
> clue where to begin to create a web page from scratch in python. ?I am
> sure I will want to access database, etc., all the "normal" stuff, I
> just want to do it myself as opposed to the frameworks, for learning.
>
> Thank you for any help.

Directions for a simple CGI script:

1) Start apache.

2) Use a text editor to create a webpage with a link:

<html>
<head>
<title>Python CGI Test</title>
</head>

<body>
<div>
<a href="http://localhost/cgi-bin/first.py">click me</a>
</div>
</body>

</html>

Save that file with a .htm extension anywhere on your computer, e.g.
name the file test.htm and save it in C:\My Documents.


3) The value of the link's href attribute is a special url.  The url
starts with "http://localhost", or it may need to start with something
like http://localhost:8080" depending on what port number you
installed Apache on.  If you used the default port when you installed
Apache, then the first part of the url will be "http:/localhost".

The rest of the url is the relative path to your cgi script.  The path
is relative to your Apache2 folder.  For instance, my directory
structure looks like this:

Apache2
----htdocs
----cgi-bin
--------first.py
----etc.

So the relative path to my cgi script is "/cgi-bin/first.py".

4) Create a cgi script:

#!/usr/bin/env python

#For Windows, instead of the above line use
#something like: #!C:\Python25\python.exe
#instead.  The path after "#!" should be the
#path to wherever python.exe is on your computer.

import cgitb; cgitb.enable()

#The above line will cause error messages to
#be sent to your browser, which is helpful for
#debugging.  Otherwise, your browser will just
#show a blank page when there is an error in your
#script

print "Content-type: text/html"
print
print "<h1>Hello World</h1>"


The first print statement is the minimum header you need when
responding to a web page.  After you print all the headers you desire,
then you need to print a blank line.  After the blank line, you print
the html that you want the browser to display.


5) On Unix: you have to set the file permissions for your cgi script.
Everyone must be able to read and execute your cgi script:

$ chmod 755 first.py


6) Start your web browser, and click on File>Open and navigate to
your .htm file.  When your html page opens in your browser, click on
the link.  The link will call your python cgi script, the cgi script
will respond my sending some html to your browser, then your browser
will display the html.




From gagsl-py2 at yahoo.com.ar  Thu May  1 05:10:23 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 May 2008 06:10:23 -0300
Subject: A bug in difflib module? (find_longest_match)
References: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>
Message-ID: <op.uagw3l0xx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 01 May 2008 04:35:17 -0300, n00m <n00m at narod.ru> escribi?:

> from random import randint
>
> s1 = ''
> s2 = ''
>
> for i in xrange(1000):
>     s1 += chr(randint(97,122))
>     s2 += chr(randint(97,122))
>
> print s1[:25]
> print s2[:25]
>
> import difflib
>
> s = difflib.SequenceMatcher(None, s1, s2)
>
> print s.find_longest_match(0, len(s1), 0, len(s2))
>
>
>
>>>> ============== RESTART ====================
>>>>
> yymgzldocfaafcborxbpqyade
> urvwtnkwfmcduybjqmrleflqx
> (0, 0, 0)
>>>>
>
> I think it's line #314 in difflib "who's to blame" --

Me too. Could you think of some alternative? Simply disabling that  
"popularity check" would slow down the algorithm, according to the  
comments.

-- 
Gabriel Genellina



From gandalf at shopzeus.com  Fri May 16 06:16:13 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Fri, 16 May 2008 12:16:13 +0200
Subject: TPCServer and xdrlib
Message-ID: <482D5EED.6040900@shopzeus.com>


  Hi All,

I'm trying to write a multi threaded TPC server. I have used xmlrpc 
before for many purposes, but in this case this would not be efficient:

- I have to send larger amounts of data, the overhead of converting to 
XML and parsing XML back would be too much pain
- I have no clue how to do keep-alive with simplexmlrpcserver and it is 
slow to open a new connection for each RPC
- I would like to do session management (authentication, then store 
session info on server site) which is also hard with xmlrpc.

I have looked at various solutions including:

- PyOrbit - too heavy weight
- Pyro - uses pickle, I do not trust it

BTW I do not care about the clients - they must trust the server side. 
In contrast, the server should not receive anything from the clients 
that is dangerous. I would like to use something that is fast, and can 
only transfer data, not code. For this reason I think I cannot use the 
marshal module because it is able to marshal code objects. I think I'm 
going to implement my own "pickler" over xdrlib, that will only 
pack/unpack data, NOT code. (It would also have the advantage that 
others could write clients in different languages.)

Before I start re-inventing the wheel:

- Is there another (already existing) higher level framework that I can 
try? It should be safe and fast, that is the only restriction.
- Do you think that it is a good idea to use xdrlib? I haven't seen 
projects using it directly. For me it is like the rotor module was - it 
was there but almost nobody used it. There might be a better lower level 
library which I don't know of.

Thank you,

   Laszlo



From subhabrata.iisc at hotmail.com  Tue May 27 10:25:28 2008
From: subhabrata.iisc at hotmail.com (subhabrata.iisc at hotmail.com)
Date: Tue, 27 May 2008 07:25:28 -0700 (PDT)
Subject: Creating a web page with Python
Message-ID: <e1257903-e615-4616-8786-aed2d4a80c24@s33g2000pri.googlegroups.com>

Dear Members of the group,
If any one can help me with an idea how to create a web page with
python? Do I have to use vbscript or something like that? I also want
to embed the function in the button of a form. How can I do it in
Python?
Regards,
Subhabrata Banerjee.


From sn at sncs.se  Tue May 27 12:18:28 2008
From: sn at sncs.se (Sverker Nilsson)
Date: Tue, 27 May 2008 09:18:28 -0700 (PDT)
Subject: New chairman
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
	<mailman.1648.1211899834.12834.python-list@python.org>
	<a4824a08-30ab-4182-820f-3e2dbf9b70a6@z72g2000hsb.googlegroups.com>
	<529d275a-1274-43f4-b6a8-a844c3692711@59g2000hsb.googlegroups.com> 
	<mailman.1654.1211903729.12834.python-list@python.org>
Message-ID: <a0ba86f9-b1e7-47de-9875-9bd436a21a1d@e39g2000hsf.googlegroups.com>

I am probably bad too, I just don't think there is a good rationale.
That's the issue.

Now I 'have' to leave but keep up the conversation if you like.
Looking forward to see your comments.

S.


On May 27, 5:55 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
wrote:
> 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> > I dont want to be a new Guido. Somebody else please.
>
>     Please, explain why should we fork Python? Because Python 3.0 will
> have 'print' as a function, not as a statement, am I right? Or maybe
> the reason is a major breakage of C API in Python 3.0, so that
> Guppy-PE/Heapy will both need a complete re-write? There is a
> rationale for these changes and you've been told about it several
> times, but you don't care much to listen.
>     Well, anyway, nobody stops you from forking a project called
> 'Python'. Python is free software, as you know.
>
>
>
> > S.
>
> > On May 27, 5:21 pm, Sverker Nilsson <s... at sncs.se> wrote:
> >> I was talking about Guido van Rossum
>
> >> The one who decides, so far when people agree
>
> >> But we can make a new fork
>
> >> He is the originator, but now it seems, for me, it is hanging out in
> >> the air
>
> >> So we need some new leadership
>
> >> From somebody, somebody like you perhaps. Or me.
>
> >> Sverker
>
> >> On May 27, 4:50 pm, "Andrii V. Mishkovskyi" <misho... at gmail.com>
> >> wrote:
>
> >> > 2008/5/27 Sverker Nilsson <s... at sncs.se>:
>
> >> > > seems to be needed
>
> >> > > He doesn't seem to care much anyway now
>
> >> > > Or if he cares, he have many other assignments
>
> >> > Who are you talking about?
>
> >> > > So should we try to elect a new chairman?
>
> >> > Chairman? Elaborate please.
>
> >> > > I am probably not eligible. There must be many others.!
>
> >> > > Do you dare?consper
>
> >> > Hm, are you and castrionpi twin brothers or something?
>
> >> > > S.
> >> > > --
> >> > >http://mail.python.org/mailman/listinfo/python-list
>
> >> > --
> >> > Wbr, Andrii Mishkovskyi.
>
> >> > He's got a heart of a little child, and he keeps it in a jar on his desk.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --
> Wbr, Andrii Mishkovskyi.
>
> He's got a heart of a little child, and he keeps it in a jar on his desk.



From michele.simionato at gmail.com  Fri May 23 04:29:33 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 23 May 2008 01:29:33 -0700 (PDT)
Subject: pickle error: can't pickle instancemethod objects
References: <d7726607-13f9-4cb1-8678-14f054f232eb@e39g2000hsf.googlegroups.com>
	<g15u8f$t0f$03$2@news.t-online.com>
Message-ID: <7013ab0c-96b7-4152-90f5-0fc515acdb02@i76g2000hsf.googlegroups.com>

On May 23, 10:12?am, Peter Otten <__pete... at web.de> wrote:
> Michele Simionato wrote:
> > Can somebody explain what's happening with the following script?
> > ? ? def __gestate__(self): # should skip the bound methods attributes
>
> Must be __getstate__ ;)
>
> Peter

Aaargh!!! I spent a couple of hours on a typo!
Thanks anyway, now everything makes sense again ;)


From mail at timgolden.me.uk  Fri May 16 10:07:31 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 16 May 2008 15:07:31 +0100
Subject: Problem creating a shorcut
In-Reply-To: <Xns9AA09442779A0duncanbooth@127.0.0.1>
References: <2715b502-d636-4541-ac0e-05697f02b2ae@m44g2000hsc.googlegroups.com>	<c550g5-l5f.ln1@darkstargames.dnsalias.net>	<mailman.1218.1210936257.12834.python-list@python.org>
	<Xns9AA09442779A0duncanbooth@127.0.0.1>
Message-ID: <482D9523.8030206@timgolden.me.uk>

Duncan Booth wrote:
> It's not too hard to get the required command line from the registry:
> 
> import _winreg
> print _winreg.QueryValue(_winreg.HKEY_CLASSES_ROOT,
>     'FirefoxURL\shell\open\command')
> 
> and of course it throws an exception if firefox isn't installed.
> 
> Then just replace %1 with the url to get the actual command you need.

That's neat. You learn something new...

TJG


From notbob at nothome.com  Sat May 10 12:19:19 2008
From: notbob at nothome.com (notbob)
Date: Sat, 10 May 2008 16:19:19 GMT
Subject: Now what!?
Message-ID: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>

Grrr....

I'm following A Byte of Python and into the while loops chap.  I cp/paste
while.py to a file and give 777 perms.  I mv while.py to while and run it (./while)
as a standalone script.  I get errors.

Here is the script:

while.py

http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html


When I run it as.....

$ python while

.....it works perfect.  But, if I run it simply as.....

$ ./while

.....I get this:

$ ./while
number: illegal number: =
./while: line 6: running: command not found
./while: line 9: syntax error near unexpected token ('
./while: line 9:         guess = int(raw_input('Enter an integer : '))'

Why does it work one way and not the other.  If I run the simple hello world
script the same way ($ ./helloworld) and it works fine.  Same shebang, same
dir, same permission, etc.  I even meticulously indented everything
perfectly by hand.  What am I missing?

BTW, anyone know a better cli news client/editor combo than slrn/jed (don't
even think vi!)?  When I cp/past code (or most anything else) to jed, all
the lines become stair-stepped.  This is no biggie for a most stuff, but for
idented code, it's unacceptable.  

nb



From vginer at gmail.com  Mon May 19 14:07:06 2008
From: vginer at gmail.com (Vicent Giner)
Date: Mon, 19 May 2008 11:07:06 -0700 (PDT)
Subject: Using Python for programming algorithms
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
	<48315082$0$24599$426a74cc@news.free.fr>
	<62884fc6-6c74-4477-91de-7b7689b5fa75@m44g2000hsc.googlegroups.com>
Message-ID: <ee46a032-8441-4a4f-aae5-e42a39b3d78b@w7g2000hsa.googlegroups.com>

On May 19, 6:11 pm, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
> On May 19, 7:03 am, Bruno Desthuilliers <bruno.
>

>  I'm pretty sure about that: when the algorithms take 4 hours to test
> a single execution, you value processor time.


Yes, of course, but that should mean that I have to do it better, in
the programming step (I would have to re-program or re-implement my
algorithm). And I think the problem would be the same in any other
language, wouldn't it?


>  The situation would be simpler if there were good well-known toolkits
> for optimization in python (like numpy for matrix operations), but
> that's not the case.

Are there such toolkits in other languages? I am not sure they exist
in C, for example.

By the way, is it possible (and easy) to call a C function from a
Python program??





From larry.bates at websafe.com`  Tue May 13 08:56:08 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 13 May 2008 07:56:08 -0500
Subject: downloading a link with javascript in it..
In-Reply-To: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
Message-ID: <fqednZbSpdEdErTVnZ2dnUVZ_oPinZ2d@comcast.com>

Jetus wrote:
> I am able to download this page (enclosed code), but I then want to
> download a pdf file that I can view in a regular browser by clicking
> on the "view" link. I don't know how to automate this next part of my
> script. It seems like it uses Javascript.
> The line in the page source says
> href="javascript:openimagewin('JCCOGetImage.jsp?
> refnum=DN2007036179');" tabindex=-1>
> 
> So, in summary, when I download this page, for each record, I would
> like to initiate the "view" link.
> Can anyone point me in the right direction?
> 
> When the "view" link is clicked on in IE or Firefox, it returns a pdf
> file, so I should be able to download it with
> urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
> 
> Here is the following code I have been using
> ----------------------------------------------------------------
>     import urllib, urllib2
> 
>     params = [
>                 ('booktype', 'L'),
>                 ('book', '930'),
>                 ('page', ''),
>                 ('hidPageName', 'S3Search'),
>                 ('DoItButton', 'Search'),]
> 
>     data = urllib.urlencode(params)
> 
>     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> S3DataLKUP.jsp", data)
> 
>     s = f.read()
>     f.close()
>     open('jcolib.html','w').write(s)
> 

You may want to take a look at mechanize, I'm having pretty good luck with using 
it to do the types of things you describe.


http://wwwsearch.sourceforge.net/mechanize/

-Larry


From exarkun at divmod.com  Mon May 12 11:25:48 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 12 May 2008 11:25:48 -0400
Subject: buffering choking sys.stdin.readlines() ?
In-Reply-To: <afe1d190-0208-48e7-8231-52542e46d685@e53g2000hsa.googlegroups.com>
Message-ID: <20080512152548.6859.259250669.divmod.quotient.62510@ohm>

On Mon, 12 May 2008 08:05:39 -0700 (PDT), cshirky <cshirky at gmail.com> wrote:
>Newbie question:
>
>I'm trying to turn a large XML file (~7G compressed) into a YAML file,
>and my program seems to be buffering the input.
>
>IOtest.py is just
>
>  import sys
>  for line in sys.stdin.readlines():
>    print line
>
>but when I run
>
>$ gzcat bigXMLfile.gz | IOtest.py
>
>but it hangs then dies.

file.readlines reads the entire file into a list in memory.  You may not
want to do this.  You could try, instead, iterating over "sys.stdin",
which should not try to load the entire file into memory.

Jean-Paul


From afrobeard at gmail.com  Thu May 15 19:47:58 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:47:58 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>
Message-ID: <8e4f775d-1d68-4c77-8644-b2298e92a6d8@m45g2000hsb.googlegroups.com>

According to http://en.wikipedia.org/wiki/Expression_(programming)

"An expression in a programming language is a combination of values,
variables, operators, and functions that are interpreted (evaluated)
according to the particular rules of precedence and of association for
a particular programming language, which computes and then produces
(returns, in a stateful environment) another value."

l.__delslice__(0,len(l)) is an expression because it returns None
[which also happens to be a value] in this case.

On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following proposed solution is not intended to be a solution, it
> > goes completely against the zen of python. [Type import this into the
> > python command interpreter]
>
> > I brought it down to two lines:-
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > itertools would still be a better approach in my opinion.
>
> > Just because I'm curious to know, can anyone bring it shorter[even if
> > its cryptic] than this without invoking any Python Library.
>
> > P.S. Once again I would not recommend using this as Explicit is better
> > than Implicit
> > P.P.S. It is strongly undesirable for us humans to use anything
> > starting with __ :)
>
> > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > | It seems that I rather frequently need a list or iterator of the form
> > > > | [x for x in <> while <>]
>
> > > > I can think of two ways to interpret that.
> > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > >> the expression <B> is false.
>
> > > def gen(a):
> > > ? ? for x in a:
> > > ? ? ? ? if B: break
> > > ? ? ? ? yield x
>
> > > a_gen = gen(A)
>
> > > # now iterate over a_gen
>
> > > --
> > > Geoff- Hide quoted text -
>
> > - Show quoted text -
>
> In your original, you have:
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> You may be hyperextending the use of '..if..else..', which is one of
> my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> an expression.



From bthate at gmail.com  Sun May 18 05:11:11 2008
From: bthate at gmail.com (Bart Thate)
Date: Sun, 18 May 2008 02:11:11 -0700 (PDT)
Subject: GOZERBOT 0.8.1-BETA released
Message-ID: <ae5cc428-2451-41c5-b7f9-12fd706726c2@e39g2000hsf.googlegroups.com>


working to a new 0.8.1 release we make a BETA available to be tested
by interested users.

new features:

    * ssl connections are now supported
    * third party software included into gozerbot:
          o feedparser (used by RSS) .. makes atom feeds possible
          o simplejson (used by COLLECTIVE)
          o BeautifulSoup (used to parse webpages)
    * renewed RSS plugin
    * renewed collective plugin
    * renewed webserver plugin .. new webserver API
    * tcp.py notification plugin as well as a totcp.py client program

if you are using one of these features please test this BETA.

the BETA can be downloaded from http://gozerbot.org and problems with
it can be reported on http://dev.gozerbot.org or email me at
bthate at gmail.com

about gozerbot:

Requirements

    * a shell
    * python 2.4 or higher
    * if you want to remotely install plugins: the gnupg module
    * if you want mysql support: the py-MySQLdb module
    * if you want jabber support: the xmpppy module

Why gozerbot?

    * provide both IRC and Jabber support
    * user management by userhost .. bot will not respond if it
doesn't know you (see /docs/USER/)
    * fleet .. use more than one bot in a program (list of bots) (see /
docs/FLEET/)
    * use the bot through dcc chat
    * fetch rss feeds (see /docs/RSS/)
    * remember items
    * relaying between bots (see /docs/RELAY/)
    * program your own plugins (see /docs/PROGRAMPLUGIN/)
    * run the builtin webserver (see /docs/WEBSERVER/)
    * query other bots webserver via irc (see /docs/COLLECTIVE/)
    * serve as a udp <-> irc or jabber gateway (see /docs/UDP)
    * mysql and sqlite support

the gozerbot development team


From tjreedy at udel.edu  Wed May 14 23:54:55 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 23:54:55 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com><Xns9A9EA1FF16358duncanbooth@127.0.0.1><mailman.1124.1210784308.12834.python-list@python.org>
	<20080514220126.e13d7cf1.johnjsal@NOSPAMgmail.com>
Message-ID: <g0gc6b$sbn$1@ger.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:20080514220126.e13d7cf1.johnjsal at NOSPAMgmail.com...
| On Wed, 14 May 2008 12:58:12 -0400
| "Terry Reedy" <tjreedy at udel.edu> wrote:
|
| > gmane.comp.python.general
| >
| > which is where I am answering this from.  Works great.
|
| So that's the same as c.l.p.?

It is the same as python-list, which happens to be the same as c.l.p..
Gmane mirrors technical mailing lists, including over 200 under g.c.python.





From basti.wiesner at gmx.net  Sat May 24 15:46:49 2008
From: basti.wiesner at gmx.net (Sebastian 'lunar' Wiesner)
Date: Sat, 24 May 2008 21:46:49 +0200
Subject: Python, Daemons and D-Bus
References: <739ea057-0839-4836-bbf9-6f9538f6eeaf@s21g2000prm.googlegroups.com>
Message-ID: <g19rcb$pjt$02$1@news.t-online.com>

[ PurpleServerMonkey <PurpleServerMonkey at gmail.com> ]

> Would you use D-Bus or a more traditional IPC method such as sockets?
> Although D-Bus is relatively new it looks interesting, just not sure
> it would work well in this kind of project.

DBus is not really intended for private communication between processes of
the same application, but more for intercommunication between different
applications.  If the IPC interface of your backend daemons is intended to
be used by other applications, DBus is the right choice, otherwise I would
choose something different.

The reason is, that DBus doesn't know about applications.  It exposes all
objects registered on the bus to every DBus client on the system and so
makes you application-private API available to the public (and spams the
bus with lots of generally useless objects ;) ).

In case your IPC interface is application private, a custom IPC protocol
(probably using XML RPC over unix sockets) is better suited.

Moreover you should make your choice dependent on the type of data you
transmit.  Both DBus and XML-RPC wrap calls into XML messages, which is
terribly inefficient for large binary data.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)


From deets at nospam.web.de  Wed May 21 09:34:56 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 May 2008 15:34:56 +0200
Subject: C-like assignment expression?
References: <68b5d090-9e3b-4e7d-9dda-fc1b099822c2@m73g2000hsh.googlegroups.com>
	<48340412$0$10773$426a74cc@news.free.fr>
	<87fxsbzxn4.fsf@mulj.homelinux.net>
	<7df99fd4-21c9-49a1-ba65-e55794fd4c12@26g2000hsk.googlegroups.com>
Message-ID: <69imp0F33sdj6U1@mid.uni-berlin.de>

boblatest at googlemail.com wrote:

> On May 21, 1:47 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> 
>> Although that solution is pretty, it is not the canonical solution
>> because it doesn't cover the important case of "if" bodies needing to
>> access common variables in the enclosing scope.  (This will be easier
>> in Python 3 with 'nonlocal', though.)  The snippet posted by Diez is
>> IMHO closer to a canonical solution to this FAQ.
> 
> Hello everybody,
> 
> thanks for the various answers. I'm actually pretty puzzled because I
> expected to see some obvious solution that I just hadn't found before.
> In general I find Python more elegant and syntactically richer than C
> (that's where I come from), so I didn't expect the solutions to be a
> lot more verbose and/or ugly (no offense) than the original idea which
> would have worked if Python's assignment statement would double as
> expression, as in C.

Well, it's a design-decision - and I'm pretty ok with it being a bit verbose
here - as it prevents a *great* deal of programming errors that would
otherwise happen from accidentally writing a = b where a == b was meant.

One could argue that regular expressions - which seem to be THE case where
it bugs people - should offer a standard way that essentially works as my
solution - by keeping state around, making series of tests easier.


Diez


From inhahe at gmail.com  Thu May 22 12:27:24 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 12:27:24 -0400
Subject: conventions/requirements for 'is' vs '==', 'not vs '!=', etc
Message-ID: <X8hZj.61426$3v1.31552@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message news:...
> >Ma: Symbolic identity is a mathematical relation
>>Mb: Symbols are acausal
>>m: Matter is causal
>>C: Symbolic identity is not defined on matter.
>

I do think though that a computer languages claiming operations on 
'identity', as vis a vis 'equivalence', is completely contrived, as in, it's 
just an arbitary distinction about the way in which we're going to compare 
bits.




From usenet at solar-empire.de  Sun May  4 11:24:54 2008
From: usenet at solar-empire.de (Marc Christiansen)
Date: Sun, 4 May 2008 17:24:54 +0200
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
Message-ID: <6311f5-ppe.ln1@pluto.solar-empire.de>

Alexander Schmolck <a.schmolck at gmail.com> wrote:
> Gary Herron <gherron at islandtraining.com> writes:
> 
>> But... It's not!  
>>
>> A simple test shows that.   I've attached a tiny test program that
>> shows this extremely clearly.  Please run it and watch it fail.
> 
> In [7]: run ~/tmp/t.py
> final count: 2000000
>   should be: 2000000
> 
> (I took the liberty to correct your test to actually do what I said, namely
> use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> numpy.array(0)``).

I did the same change. Here are the results of four runs:

final count: 1999980
  should be: 2000000

final count: 1999996
  should be: 2000000

final count: 1999123
  should be: 2000000

final count: 1999978
  should be: 2000000

This is on a AMD64 X2 using Python 2.5.2 and numpy 1.0.4.

Marc


From bignose+hates-spam at benfinney.id.au  Mon May 12 02:27:46 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 12 May 2008 16:27:46 +1000
Subject: anonymous assignment
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
	<n_OVj.133864$Cj7.40861@pd7urf2no>
Message-ID: <87d4ns6nq5.fsf@benfinney.id.au>

Yves Dorfsman <yves at zioup.com> writes:

> Paul Rubin wrote:
> > Yves Dorfsman <yves at zioup.com> writes:
> >> import time
> >> y, None, d, None, None, None, None = time.localtime()
> >>
> >> I know you can't assign anything to None, but I'm sure you get what I
> >> mean, a special keyword that means I don't care about this value.
> >
> > You can just use a variable name than you ignore.  It's traditional to
> > use _ but it's not a special keyword, it's just a another variable name:
> >
> >    y, _, d, _, _, _, _, _, _ = time.localtime()
> 
> But you still have have a variable that's using memory for nothing.

No, you have one extra unused name binding. The values that you don't
want to use have *already* been allocated by the time the above
statement is executed. Name binding doesn't copy the values, it merely
binds a name to them. There's no "variable" in the above statement.

-- 
 \                       ?Holy human pressure cookers, Batman!? ?Robin |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From duncan.booth at invalid.invalid  Fri May 23 10:15:55 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 May 2008 14:15:55 GMT
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<48369413$0$25059$607ed4bc@cv.net>
	<4836ac7b$0$14350$e4fe514c@news.xs4all.nl>
	<Xns9AA78619210F2duncanbooth@127.0.0.1>
	<5tdd34tqp80s2va8h3ntpu04gj9knad393@4ax.com>
Message-ID: <Xns9AA79A81E3F08duncanbooth@127.0.0.1>

Michael Fesser <netizen at gmx.de> wrote:

> .oO(Duncan Booth)
> 
>>On those rare occasions when I've helped someone who wanted advice
>>I've found that my Python oriented viewpoint can be quite hard to
>>translate to PHP. For example I'd suggest 'oh you just encode that as
>>utf8' only to be told that there's no easy way to do that (have just
>>Google'd it looks like there is now a way to do that but with a big
>>red warning about it being EXPERIMENTAL and only use at your own
>>risk). 
>>
>>(Looking at the example given for unicode_encode it appears to depend
>>for its working on a global setting which isn't included in the
>>example. I may have misunderstood the example but if I read that
>>correctly its a good example of why PHP doesn't fit my brain.)
> 
> The only little problem is that PHP doesn't have native Unicode
> support yet, which will change with PHP 6. But of course you can still
> use UTF-8 without any trouble, I do it all the time. You just have to
> keep in mind that many string functions still work on bytes, not on
> characters, but this can almost always be solved with the Multibyte
> extension. Apart from that there's no problem with PHP and UTF-8. It's
> also easily possible to convert between various encodings using the
> iconv extension. 
> 
As I remember it the problem was that the data was stored in a database 
in latin-1 but the HTML page had to be in utf-8 (because the rest of the 
server and therefore all the page skins were already in utf-8). In 
python that would be a trivial conversion but I was told that in PHP it 
wasn't. 

Also it was PHP4 and as I understand it updating to a more recent 
version was non-trivial. Of course sometimes updating Python code to a 
newer version is also non-trivial: Zope in particular is very version 
specific but in most cases anything written in pure Python will be 
compatible with more recent versions.

But one small example isn't really the point. It's that the whole way 
Python works seems *to me* to make sense and (mostly) fits together 
cleanly and consistently. YMMV

-- 
Duncan Booth http://kupuguy.blogspot.com


From sln at netherlands.co  Sun May 25 20:30:16 2008
From: sln at netherlands.co (sln at netherlands.co)
Date: Sun, 25 May 2008 17:30:16 -0700
Subject: blogs, longbets.org, and education of sociology
References: <1c97ba8a-b758-4891-a3c4-20e462361934@z16g2000prn.googlegroups.com>
Message-ID: <6t0k345vvochm8t3bsv7l1v38tq40j9oep@4ax.com>

Your opinion of yourself is only surpased by your monumental display
of mastery of the English language.

sln


On Sun, 25 May 2008 16:25:33 -0700 (PDT), "xahlee at gmail.com" <xahlee at gmail.com> wrote:

>For about the past 10 years, i have been concerned in the programing
>community's level of education in social issues.
>
>I have found that recently, a news that would be of interest to
>programers.
>
>There was a bet at longbets.org (run by Long Now Foundation) regarding
>the importance of blogs. The bet was made in 2002. The prediction has
>a resolution date in 2007.
>
>In 2008, the bet is resolved. See
>
>?Decision: Blogs vs. New York Times? (2008-02-01) by Alexander Rose
> http://blog.longnow.org/2008/02/01/decision-blogs-vs-new-york-times/
>
>I'd like encourage, for many of you, who have lots of opinions on
>technical issues or social issues surrounding software, to make use of
>longbets.org. It can help shape your thoughts from blog fart to
>something more refined. In any case, your money will benefit society.
>
>here's some examples you could try:
>
>? I bet that Java will be out of the top 10 programing languages by
>2020.
>
>? I bet that the top 10 programing languages in 2015 (as determined by
>requirement from job search engine), the majority will be those
>characterized as dynamic languages (e.g. php, perl, python,
>javascript, tcl, lisp. (as opposed to: C, Java, C++, C#, F#,
>Haskell)).
>
>? You bet that Linux as a desktop system will or will not have a
>market share of such and such by the year xyz.
>
>(I'm not sure the above ?predictions? are candidates on longbets.org,
>since one of their rule is that the ?predictions? should be socially
>important. Looking at existing entries on their site, the social
>importance of the above items pale in comparison. (however, many of
>their existing ?predictions? are somewhat fringe))
>
>       *       *       *
>
>Note, in almost all online forums where tech geekers gather (e.g.
>newsgroups, slashdot, irc, etc), often they are anonymous, each fart
>ignorant cries and gripes and heated arguments, often in a
>irresponsible and carefree way.
>
>One of the longbets.org's goal is to foster RESPONSIBILITY.
>
>In recent years, i have often made claims that the Python's
>documentation, it's writing quality and its documentation quality in
>whole, is one of the worst.
>
>Among all the wild claims in our modern world, from the sciences to
>social or political issues, my claim about Python's technical writing
>quality or its whole quality as a technical documentation, is actualy
>trivial to verify by any standards. When presented to intellectuals of
>the world at large, the claim's verifiability is trivial, almost as a
>matter of fact checking (which are done by interns or newbie grads of
>communinication/journalism/literature majors, working for journalism
>houses). However, when i voiced my opinion on Python doc among
>programing geekers online, it is often met with a bunch of wild cries.
>Some of these beer drinking fuckheads are simply being a asshole,
>which are expected by the nature of online tech geeking communities (a
>significance percentage are bored young males). However, many others,
>many with many years of programing experience as a professional,
>sincerely tried to say something to the effect of ?in my opinion it's
>good?, or voice other stupid remarks to the effect of ?why don't you
>fix it?, and in fact find my claim, and its tone too fantastical, to
>the point thinking i'm a youngling who are bent on to do nothing but
>vandalism. (the tech geekers use in-group slang for this: ?troll?.)
>
>The case of the Python doc is just one example. I have also, in the
>past decade, in _appropriate_ online communties (e.g. newsgroups,
>mailing lists), voiced opinions on Perl's doc, emacs's doc, criticism
>on lisp nested syntax, ?software engineering? issues (e.g. OOP),
>various issues of jargons and naming (e.g. currying, lisp1 vs lisp2,
>tail recursion, closure), emacs's user interface issues, criticism on
>the phenomenon of Open Source community's fervor for bug reporting,
>criticism on IT industry celebrities such as Larry Wall and Guido von
>Rossum, opinions on cross-posting, ... and others. Some of my claims
>are indeed controversial by nature. By that i mean that there is no
>consensus on the subject among its experts, and the issue is complex,
>and has political implications. However, many trivially verifiable, or
>even simple facts, are wildly debated or raised a ruckus, because the
>programers are utterly ignorant of basic social knowledge, or due to
>their political banding (e.g. a language faction, Open Source) or
>current trends and fashions (e.g. OOP, Java, ?Patterns?, ?eXtreme
>Programing?, ... , OpenSource and ?Free? software movement, ...).
>
>I think, the founding of Long Now Foundation with its longbets.org,
>shares a concern i have on the tech geeking communities. In
>particular, tech geekers need to have a broader education on social
>sciences, needs to think in long term, and needs to foster personal
>responsibility, when they act or voice opinions on their love of
>technology. (note: not reading more motherfucking slashdot or
>motherfucking groklaw or more great podcasts on your beatific language
>or your postmodernistic fuckhead idols)
>
>(One thing you can do, is actually take a course on philosophy,
>history, law, economics, in your local community college.)
>
>Disclaimer: I have no affiliation with Long Now Foundation.
>
>       *       *       *
>
>See also:
>
>?Responsible Software Licensing? (2003-07) by Xah Lee
> http://xahlee.org/UnixResource_dir/writ/responsible_license.html
>
>?On Microsoft Hatred? (2002-02-23) Xah Lee
> http://xahlee.org/UnixResource_dir/writ/mshatred155.html
>
>  Xah
>  xah at xahlee.org
>? http://xahlee.org/
>
>?



From nick at craig-wood.com  Fri May 23 06:30:09 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 05:30:09 -0500
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
	<8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>
	<69n463F33hfhfU2@mid.uni-berlin.de>
	<f9dc7249-8c6d-432b-8844-02d658815cfd@c58g2000hsc.googlegroups.com>
Message-ID: <slrng3d4q8.3re.nick@irishsea.home.craig-wood.com>

gianluca <geonomica at gmail.com> wrote:
>  On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > > exception like this:
> >
> > > Traceback (most recent call last):
> > >   File "<pyshell#18>", line 1, in <module>
> > >     myDLL.myFUNCT()
> > >   File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> > >     func = self.__getitem__(name)
> > >   File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> > >     func = self._FuncPtr((name_or_ordinal, self))
> > > AttributeError: function 'myFUNCT' not found
> >
> > Then maybe the DLL doesn't contain a function called `myFUNCT`.  Any
> > chance you compiled your C as C++ and name mangling kicked in?
> >
> > Can you show a minimal C source for a DLL, how you compiled it, what you
> > did on the Python side to call it, and how it fails?
> >
> > Ciao,
> >         Marc 'BlackJack' Rintsch
> 
>  I've located my dll in c:\windows\system32 (in linux I aven't any
>  problem) and I compiled it with dev-c++. The source code is C standard
>  ANSII and is quite havy. If you like I can send it via mail (you can
>  realy at geonomica at gmail.com) . I've tryed to build a wrape with swig
>  olso with same code and I can access at all the function.

You can use objdump from mingw or cygwin to look inside the dll and
see exactly what it is exporting, eg

objdump -x OurSharedCodeLibrary.dll

This prints a great deal of stuff!  In the middle you'll see

[snip]
The Export Tables (interpreted .rdata section contents)
[snip]
Ordinal/Name Pointer] Table
        [   0] OSCL_DEBUG_fakeInitComplete
        [   1] OSCL_close
        [   2] OSCL_displayIdent
        [   3] OSCL_getCurrentDynamicParams
        [   4] OSCL_getCurrentStaticParams
        [   5] OSCL_getErrorString
        [   6] OSCL_getIdent
[snip]

This is a dll we used in a project, and those names exactly worked
with ctypes, eg some snips from the ctypes code

        self.dll = cdll.LoadLibrary("OurSharedCodeLibrary")
        self.dll.OSCL_getErrorString.restype = c_char_p

    def getErrorString(self, status):
        return self.dll.OSCL_getErrorString(c_int(status))

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From saluk64007 at gmail.com  Thu May 22 21:19:47 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Thu, 22 May 2008 18:19:47 -0700
Subject: MVC
In-Reply-To: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
References: <8a269063-ae96-4707-afdc-5d2c9270e0ff@a9g2000prl.googlegroups.com>
Message-ID: <c3f69bf60805221819s4c2d241dkf9788b9759e56968@mail.gmail.com>

In my experience, python is very pattern agnostic.  You can do functional or
object oriented or procedural fairly easily, have deep or light object
trees, or even mix procedural style with some object oriented code if you
like.  "There should be one way to do it" tends to not apply as much as some
would say, although the language doesn't bend over backward to make sure
programmers have flexibility.

MVC is a well respected pattern, and most of the major python web frameworks
are designed in an MVC way, so you should be just fine to use MVC for your
application.  Worry more about what pattern fits your application, than
whether your pattern fits the language.  For myself, whenever I try to do
strict MVC, it always tends to blend together.  I usually get some sort of
MC+V or MV+C sort of hybrid.  The model is also the view, or the controller
is also the model.  But that's just how I think.

Just keep in mind that python is not java, and you should be able to
transition very easily.  In fact, you could pretend python is java and go
far, but you risk irritating other python programmers who look at your code
:)  We had to use jython for a class, and my friend's code (he's a java
programmer) made me want to pull out my hair.  Private variables and get/set
functions all over the place...
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From afrobeard at gmail.com  Thu May 15 19:52:16 2008
From: afrobeard at gmail.com (afrobeard)
Date: Thu, 15 May 2008 16:52:16 -0700 (PDT)
Subject: ?
References: <f8229614-a000-450e-85eb-825e6c1386cf@w7g2000hsa.googlegroups.com>
	<mailman.1145.1210835228.12834.python-list@python.org>
	<51e0f25d-474a-450a-ad00-92f70c893c6c@m44g2000hsc.googlegroups.com>
	<482c2424$1_1@glkas0286.greenlnk.net>
	<1470fcf1-ccf0-4a86-973d-c031ec53b83f@k37g2000hsf.googlegroups.com>
	<8cdfb4fb-a79c-4a04-a5ff-1ea0ccb7dab4@e53g2000hsa.googlegroups.com>
Message-ID: <76eda66f-0075-41b4-9bd8-404db917a323@k13g2000hse.googlegroups.com>

l.__delslice__(0,len(l)) is an expression as it returns None which is
a value


On May 16, 4:23?am, castironpi <castiro... at gmail.com> wrote:
> On May 15, 6:07?pm, afrobeard <afrobe... at gmail.com> wrote:
>
>
>
> > The following proposed solution is not intended to be a solution, it
> > goes completely against the zen of python. [Type import this into the
> > python command interpreter]
>
> > I brought it down to two lines:-
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> > itertools would still be a better approach in my opinion.
>
> > Just because I'm curious to know, can anyone bring it shorter[even if
> > its cryptic] than this without invoking any Python Library.
>
> > P.S. Once again I would not recommend using this as Explicit is better
> > than Implicit
> > P.P.S. It is strongly undesirable for us humans to use anything
> > starting with __ :)
>
> > On May 15, 5:10?pm, "Geoffrey Clements"
>
> > <geoffrey.clement... at SPAMbaesystems.com> wrote:
> > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > >news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
> > > On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> > > > "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> > > >news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> > > > | It seems that I rather frequently need a list or iterator of the form
> > > > | [x for x in <> while <>]
>
> > > > I can think of two ways to interpret that.
> > > >> I mean like [x for x in <A> if <B>], only that it breaks the loop when
> > > >> the expression <B> is false.
>
> > > def gen(a):
> > > ? ? for x in a:
> > > ? ? ? ? if B: break
> > > ? ? ? ? yield x
>
> > > a_gen = gen(A)
>
> > > # now iterate over a_gen
>
> > > --
> > > Geoff- Hide quoted text -
>
> > - Show quoted text -
>
> In your original, you have:
>
> > l = range(6)
> > [1 if b!=4 else l.__delslice__(0,len(l)) for b in l][:-1]
>
> You may be hyperextending the use of '..if..else..', which is one of
> my fears regarding 'with x as y'. ?"l.__delslice__(0,len(l))" is not
> an expression.



From benjamin.kaplan at case.edu  Mon May 19 05:31:47 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Mon, 19 May 2008 05:31:47 -0400
Subject: python script to windows exe
In-Reply-To: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
References: <c05d0a2d-0125-4acf-a7dd-2fc304ac8b32@m45g2000hsb.googlegroups.com>
Message-ID: <ec96e1390805190231y7e5d9e46r156ec9b6cdb0bd84@mail.gmail.com>

On Mon, May 19, 2008 at 3:32 AM, sandeep <shiningsandy at gmail.com> wrote:

> hi all
>
> i am very much a newbie to python but has some experience of
> development.i am trying to write a script which will loop through the
> outlook 2003 inbox and save the email data in an simple data.html page
> and save all the attachments in a folder name emails.after some
> initial struggling i am able to write this script.but now i want to
> create the exe file of this script.i have used py2exe for this job and
> created the exe. but when i run the exe my program in not behaving as
> it supposed to be.its generating some errors.i dont know why this
> thing is happening as when i run my script it works fine.can some one
> put some light here. i am using python2.5 and is using
> py2exe-0.6.6.win32-py2.5.exe of py2exe. My os is windows xp with
> service pack2.
>
>
> thanks and reagrds
> sandeep kumar sharma
> --
> http://mail.python.org/mailman/listinfo/python-list
>


What exactly are those errors? You can get more help if we know more about
the problem.
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From pavlovevidence at gmail.com  Mon May 12 19:10:51 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 12 May 2008 16:10:51 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
	<87skwn5dly.fsf@benfinney.id.au>
Message-ID: <2b5e2e48-c787-4648-b0e2-54c1dd68bcb5@x35g2000hsb.googlegroups.com>

On May 12, 7:03 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > IMHO, whether a varibale is used or not has got to be one of the least
> > important things of all (in no small part because it's easily
> > discernable from nearby code).
>
> I couldn't disagree more.
>
> If you're binding a name to a value that will never be used, you're
> doing me (the reader of the code) a great favour if you indicate
> clearly and concisely that this value is not intended to be referenced
> anywhere else. Saving time for the reader is a very important job of
> the writer of code.

I don't think knowing in advance whether a variable is going to be
used or not benefits readability.


Carl Banks


From gnewsg at gmail.com  Tue May 13 14:50:30 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Tue, 13 May 2008 11:50:30 -0700 (PDT)
Subject: asynchat sends data on async_chat.push and .push_with_producer
References: <0c0e20cb-a81b-4f8b-ada8-d4a8d2ac9938@34g2000hsf.googlegroups.com>
	<8234c478-5d70-46d7-b794-8d18c26fcb10@l28g2000prd.googlegroups.com>
Message-ID: <da09c7d6-78ff-49fa-b1d5-d085256fe5e7@59g2000hsb.googlegroups.com>

On 13 Mag, 17:59, Josiah Carlson <josiah.carl... at gmail.com> wrote:

> We do not live in a pure world, Python isn't pure (practicality beats
> purity), and by attempting to send some data each time a .push*()
> method is called, there are measurable increases in transfer rates.

Good point. I'd like to ask a question: if we'd have a default
asyncore.loop timeout of (say) 0.01 ms instead of 30 could we avoid
such problem?
I've always found weird that asyncore has such an high default timeout
value.
Twisted, for example, uses a default of 0.01 ms for all its reactors.


From michael.hines at yale.edu  Sat May 24 10:05:45 2008
From: michael.hines at yale.edu (Michael Hines)
Date: Sat, 24 May 2008 10:05:45 -0400
Subject: raising an exception when multiple inheritance involves same base
Message-ID: <1211637945.13961.46.camel@localhost.localdomain>

Hello,
I have a class factory that supports single inheritance but it is
an error if the base appears twice. e.g
class Foo(hclass(h.Vector), hclass(h.List)):
should raise an exception since h.Vector and h.List are really the same
extension class, HocObject.

So far I have only been able to do this by iterating over __mro__ during
creation of an object as in:

def hclass(c):
    class hc(hoc.HocObject):
        def __new__(cls, *args, **kwds):
            m = False
            for x in cls.__mro__:
                if (type(x) == type(hc)):
                    if m == True:
                        raise HocError, 'Multiple inheritance...'
                    m = True
            kwds.update({'hocbase':cls.htype})
            return hoc.HocObject.__new__(cls, *args, **kwds)
    setattr(hc, 'htype', c)
    return hc

Is there a way to do the test earlier (e.g during creation of the Foo
class when hclass is called the second time
instead of during creation of a Foo object).
Just before the return hc, print hc.__mro__ yields for the second call:
(<class '__main__.hc'>, <type 'hoc.HocObject'>, <type 'object'>)
wheras in the __new__, print cls.__mro__ yields:
(<class '__main__.Foo'>, <class '__main__.hc'>, <class '__main__.hc'>,
<type 'hoc.HocObject'>, <type 'object'>)


Thanks,
Michael





From mrkafk at gmail.com  Sat May  3 19:29:44 2008
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sat, 3 May 2008 16:29:44 -0700 (PDT)
Subject: dict invert - learning question
References: <fvihum$em7$1@news.xmission.com>
	<f3d28eb3-dc40-4e33-87ea-ed6844d5bdc9@m3g2000hsc.googlegroups.com>
Message-ID: <c2930007-bfa9-4e74-90b3-40693c9eaa3b@59g2000hsb.googlegroups.com>

On 4 Maj, 01:27, mrk... at gmail.com wrote:

> >>> a={1:'a', 2:'b', 3:'c'}

Oops, it should obviously be:

>>> dict(zip(a.values(), a.keys()))
{'a': 1, 'c': 3, 'b': 2}



From gagsl-py2 at yahoo.com.ar  Tue May 27 22:02:32 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 23:02:32 -0300
Subject: convert string number to real number - ValueError: invalid
	literal for int() with base 10: '"2"'
References: <3ca86e1d-a32f-48f2-bc9a-6cb792c0c631@z17g2000hsg.googlegroups.com>
	<20080228181914.6307257e.darcy@druid.net>
	<491b0d8f0805270900r4950360bjee559f9c86fb43b9@mail.gmail.com>
Message-ID: <op.ubudaihgx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 13:00:05 -0300, David Jackson <davidj411 at gmail.com>  
escribi?:

> i used the csv module and saved its contents to a list.
>
> ['Date', 'No.', 'Description', 'Debit', 'Credit']
> ['3/17/2006', '5678', 'ELECTRONIC PAYMENT', '', '11.45']
> ['3/04/2007', '5678', 'THE HOME DEPOT 263 SomeCity FL', '', '25.40']
>
>
> the credit/debit fields are strings.
> what should i have done within the CSV module to make numbers appear as
> numbers?
> how can i remove the quotes to make them numbers? i realize i posted a
> solution to this once before (same posting thread) but i am thinking  
> there
> is a better method.

What do you want to do with those empty strings? Convert them to zeros?  
Suppose your list is named `rows`:

for i,row in enumerate(rows):
     if not i: continue # skip titles
     row[3] = float(row[3] or 0)
     row[4] = float(row[4] or 0)

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Fri May  9 01:26:22 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:26:22 -0300
Subject: Cannot import opj
References: <5dc598e30805081728i7d451bber36991f5a547874a7@mail.gmail.com>
Message-ID: <op.uavf18enx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 21:28:25 -0300, David Anderson <zerty.david at gmail.com>  
escribi?:

> I'm trying to import the opj module

What's the opj module?

> Trying like this:
> from Main import opj
> It says it doesn't exists

And why do you think it should exist?

> And like this:
> import os.path.join as opj
> Raises error.
> What should I do?

os is a module, os.path is a module too, which contains a function named  
join. You can't import it that way. Try:

a) from os.path import join as opj
b) import os.path
    opj = os.path.join

You import modules (or packages) using "import xxx", or you import  
individual attributes from those modules or packages using "from xxx  
import yyy"

What are you really trying to do?

-- 
Gabriel Genellina



From cephire at gmail.com  Sun May  4 07:41:15 2008
From: cephire at gmail.com (Joseph)
Date: Sun, 4 May 2008 04:41:15 -0700 (PDT)
Subject: ISBN Barecode reader in Python?
Message-ID: <d4ae7fbf-72e9-4426-9d18-da8500d5eb31@y22g2000prd.googlegroups.com>

All: I have written a program to query Amazon with ISBN and get the
book details. I would like to extend so that I can read ISBN from the
barcode (I will take a photo of the same using webcam or mobile). Are
there any opensource/free SDK doing the same? As it is a hobby
project, I don't like to spend money on the SDK.

Thank you all for your suggestions/time,
Joseph
http://www.jjude.com


From goldnery at gmail.com  Fri May 23 09:24:20 2008
From: goldnery at gmail.com (Gandalf)
Date: Fri, 23 May 2008 06:24:20 -0700 (PDT)
Subject: WXpython Question
Message-ID: <5772771b-9b09-4870-8152-397bd93c926c@56g2000hsm.googlegroups.com>

I try to reach a specific wx StaticText element's text and to change
it by clicking on a button


now let's say the this is my element:

wx.StaticText(panel, 15, "Hello" ,(30, 70) , style=wx.ALIGN_CENTRE)


And this is my EVT_BUTTON bind function :

def OnClick(event):

which code shude i enter to change "hello" to "goodbay"?

thanks


From mensanator at aol.com  Thu May 22 14:53:56 2008
From: mensanator at aol.com (Mensanator)
Date: Thu, 22 May 2008 11:53:56 -0700 (PDT)
Subject: Why is math.pi slightly wrong?
References: <mailman.1476.1211475183.12834.python-list@python.org>
Message-ID: <6b7a57e3-0f0e-4b52-a2e8-246491dd0e7f@x35g2000hsb.googlegroups.com>

On May 22, 11:32?am, "Dutton, Sam" <Sam.Dut... at itn.co.uk> wrote:
> I've noticed that the value of math.pi -- just entering it at the interactive prompt -- is returned as 3.1415926535897931, whereas (as every pi-obsessive knows) the value is 3.1415926535897932... (Note the 2 at the end.)
>
> Is this a precision issue, or from the underlying C, or something else? How is math.pi calculated?

If you actually need that many digits, use a different library.

>>> import gmpy

>>> print gmpy.pi(64) # 64 bit precision
3.14159265358979323846
>>> print gmpy.pi(128) # 128 bit precision
3.141592653589793238462643383279502884197
>>> print gmpy.pi(16384) # 16384 bit precision
3.14159265358979323846264338327950288419716939937510582097494459
2307816406286208998628034825342117067982148086513282306647093844
6095505822317253594081284811174502841027019385211055596446229489
5493038196442881097566593344612847564823378678316527120190914564
8566923460348610454326648213393607260249141273724587006606315588
1748815209209628292540917153643678925903600113305305488204665213
8414695194151160943305727036575959195309218611738193261179310511
8548074462379962749567351885752724891227938183011949129833673362
4406566430860213949463952247371907021798609437027705392171762931
7675238467481846766940513200056812714526356082778577134275778960
9173637178721468440901224953430146549585371050792279689258923542
0199561121290219608640344181598136297747713099605187072113499999
9837297804995105973173281609631859502445945534690830264252230825
3344685035261931188171010003137838752886587533208381420617177669
1473035982534904287554687311595628638823537875937519577818577805
3217122680661300192787661119590921642019893809525720106548586327
8865936153381827968230301952035301852968995773622599413891249721
7752834791315155748572424541506959508295331168617278558890750983
8175463746493931925506040092770167113900984882401285836160356370
7660104710181942955596198946767837449448255379774726847104047534
6462080466842590694912933136770289891521047521620569660240580381
5019351125338243003558764024749647326391419927260426992279678235
4781636009341721641219924586315030286182974555706749838505494588
5869269956909272107975093029553211653449872027559602364806654991
1988183479775356636980742654252786255181841757467289097777279380
0081647060016145249192173217214772350141441973568548161361157352
5521334757418494684385233239073941433345477624168625189835694855
6209921922218427255025425688767179049460165346680498862723279178
6085784383827967976681454100953883786360950680064225125205117392
9848960841284886269456042419652850222106611863067442786220391949
4504712371378696095636437191728746776465757396241389086583264599
5813390478027590099465764078951269468398352595709825822620522489
4077267194782684826014769909026401363944374553050682034962524517
4939965143142980919065925093722169646151570985838741059788595977
2975498930161753928468138268683868942774155991855925245953959431
0499725246808459872736446958486538367362226260991246080512438843
9045124413654976278079771569143599770012961608944169486855584840
6353422072225828488648158456028506016842739452267467678895252138
5225499546667278239864565961163548862305774564980355936345681743
2411251507606947945109659609402522887971089314566913686722874894
0560101503308617928680920874760917824938589009714909675985261365
5497818931297848216829989487226588048575640142704775551323796414
5152374623436454285844479526586782105114135473573952311342716610
2135969536231442952484937187110145765403590279934403742007310578
5390621983874478084784896833214457138687519435064302184531910484
8100537061468067491927819119793995206141966342875444064374512371
8192179998391015919561814675142691239748940907186494231961567945
2080951465502252316038819301420937621378559566389377870830390697
9207734672218256259966150142150306803844773454920260541466592520
1497442850732518666002132434088190710486331734649651453905796268
5610055081066587969981635747363840525714591028970641401109712062
8043903975951567715770042033786993600723055876317635942187312514
7120532928191826186125867321579198414848829164470609575270695722
0917567116722910981690915280173506712748583222871835209353965725
1210835791513698820914442100675103346711031412671113699086585163
9831501970165151168517143765761835155650884909989859982387345528
3316355076479185358932261854896321329330898570642046752590709154
8141654985946163718027098199430992448895757128289059232332609729
9712084433573265489382391193259746366730583604142813883032038249
0375898524374417029132765618093773444030707469211201913020330380
1976211011004492932151608424448596376698389522868478312355265821
3144957685726243344189303968642624341077322697802807318915441101
0446823252716201052652272111660396665573092547110557853763466820
6531098965269186205647693125705863566201855810072936065987648611
7910453348850346113657686753249441668039626579787718556084552965
4126654085306143444318586769751456614068007002378776591344017127
4947042056223053899456131407112700040785473326993908145466464588
0797270826683063432858785698305235808933065757406795457163775254
2021149557615814002501262285941302164715509792592309907965473761
2551765675135751782966645477917450112996148903046399471329621073
4043751895735961458901938971311179042978285647503203198691514028
7080859904801094121472213179476477726224142548545403321571853061
4228813758504306332175182979866223717215916077166925474873898665
4949450114654062843366393790039769265672146385306736096571209180
7638327166416274888800786925602902284721040317211860820419000422
9661711963779213375751149595015660496318629472654736425230817703
6751590673502350728354056704038674351362222477158915049530984448
9333097


From matthieu.brucher at gmail.com  Tue May 13 13:58:01 2008
From: matthieu.brucher at gmail.com (Matthieu Brucher)
Date: Tue, 13 May 2008 19:58:01 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <e76aa17f0805131058l695e5a45x3c10530cbd491d5@mail.gmail.com>

>
> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
>
>  Write 10^2.
>
> but can't understand why another programming language gives the answer
> 8 (Python):
>
>  Print 10^2
>
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.
>

Well...

>>> 10**2
100

Why ^ ? There is no good reason why use ^ over ** and vice versa, so what
you try to prove is not with your example.

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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From duncan.booth at invalid.invalid  Fri May 30 10:02:31 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 May 2008 14:02:31 GMT
Subject: convert string containing list to list (or tuple) type
References: <g1p15p$4jo$1@aioe.org>
Message-ID: <Xns9AAE98FA47D44duncanbooth@127.0.0.1>

"Poppy" <znfmail-pythonlang at yahoo.com> wrote:

> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
> 
> for ea in (a,b,c):
>     print lst_codes(ea.strip(","))
> 

Why not just use:

 ea.strip(',').split(',')

?

-- 
Duncan Booth http://kupuguy.blogspot.com


From marlin_rowley at hotmail.com  Fri May 16 20:36:44 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 19:36:44 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <g0l6kf$dhk$1@ger.gmane.org>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
	<BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>
	<g0l6kf$dhk$1@ger.gmane.org>
Message-ID: <BAY135-W2763B4196E05928CA880609FCB0@phx.gbl>

Ok.  Here's the deal.. 
 
I've gathered a string of bytes that are turned into floats and stored in an array of floats.
 
The stream gives me color channels represented in bytes.
 
stream = 'rrrrrrrrggggggggggbbbbbbbbbaaaaaaaaarrrrrrrrrrrggggggggggbbbbbbbbbbaaaaaaaa......' etc.. 
 
the number of r's,g's,b's in one consecutive pattern represent the width of a bitmap.  The number of times the pattern (rgba) is repeated gives the height of the bitmap.  I must first convert these bytes into floats.  The rgba represents floating point values for each of the pixel components.  I've gotten that far.
 
Now I have an array of individual floats with that pattern.  I need to:
 
1) pull out the alphas from this float list.
2) reshape this float list so that I have an array that seperates the repeated pattern into a height of this bitmap: 
 
rrrrrrrrrrrgggggggggggbbbbbbbbb [0] - first pattern
...
rrrrrrrrrrrgggggggggggbbbbbbbbb [height-1] - last pattern
 
3) then I need to reverse this array so that height-1 is the first element in my new array:
 
rrrrrrrrrrrgggggggggggbbbbbbbbb [height-1]
...
rrrrrrrrrrrgggggggggggbbbbbbbbb [0]
 
since wx.Python reverses the y-axis in a bitmap
 
4) Then I need to make the pattern another pattern:
rrrrrrrrrrrgggggggggggbbbbbbbbb ---> needs to become ---> rgbrgbrgb.... starting at [height-1] (my first pattern in my new array).
 
5) Then I need to flatten the array to one continuous array of floats:
 
rgbrgbrgbrgb[from height-1]............rgbrgbrgb[height = 0]
 
this is my final array to be drawn on the screen!
 
 
 
 



> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 18:50:38 -0500> > Marlin Rowley wrote:> > All:> > > > Say I have an array:> > > > a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa'])> > I'm sorry, you are going to have to be less elliptical. Exactly what do you have > there? It's certainly not an array, but a tuple of single-element lists each > containing a single string which can be interpreted as a group of 4 IEEE-754 > single-precision floats. Is this correct? Do you really have single-element > lists? Some more context would be nice (can the tuple be longer? can the lists > be longer? can the strings be longer? etc.).> > But basically, I would concatenate all of the strings together in the correct > order and use numpy.fromstring() on the resulting string.> > And please, just respond to the list. I read this through GMane, and I don't > like getting duplicates in my in-box.> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
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From thomas.troeger.ext at siemens.com  Tue May 20 05:35:23 2008
From: thomas.troeger.ext at siemens.com (Thomas Troeger)
Date: Tue, 20 May 2008 11:35:23 +0200
Subject: Embedding Python question.
Message-ID: <g0u60r$qo0$1@aioe.org>

Dear all,

I've successfully embedded the Python interpreter into a set of C/C++ 
application programs that use a larger library project with information 
from http://docs.python.org/api/api.html and 
http://docs.python.org/ext/ext.html. Now I want to wrap classes and 
functions from the associated libraries so that I can write new 
applications completely in Python, but I'm not entirely sure how to 
start because I have some problems understanding which is the best way. 
It would be nice if someone could answer the following questions and 
clarify this matter:

- until now I've used the approach as documented in 
http://docs.python.org/ext/extending-with-embedding.html to extend the 
embedded interpreter and that works pretty well. I'd like to use a 
similar approach for other C applications. Can I write a C library that 
implements this technique and link it into all C applications that need 
Python support, or is there a better, more elegant way?

- in the documentation, there's an example that illustrates the creation 
of a python module for pure extending of a python script (the Noddy 
stuff). Do I have to make a separate module for each library I want to 
wrap? If yes, how can I manage the case where two libraries can access 
each other?

- if I write an extension module, how can I handle the case where the C 
wrapper methods want to call back into the same Python interpreter instance?

- I think my questions break down into a reference to documentation 
where a similar problem is explained in detail. Does anyone have such 
information?

Thanks!
Thomas.


From aspersieman at gmail.com  Mon May 12 03:18:46 2008
From: aspersieman at gmail.com (Aspersieman)
Date: Mon, 12 May 2008 09:18:46 +0200
Subject: Python and the Bartender
In-Reply-To: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>
References: <949a8409-a2a6-4ae1-9bfb-5b65dfdb3adc@s50g2000hsb.googlegroups.com>
Message-ID: <4827EF56.805@gmail.com>

castironpi at gmail.com wrote:
> Incidentally, now that everyone knows English, writer would like to
> critique his behavior.  I have leaned to the group for approval, at
> times by disparaging the efforts of others, but other times not.  I
> have expressed negative emotion.  Is anyone in earshot getting work
> done that I am interfering with?
>
> Otherwise, I might start telling jokes.
>
> Sincerely,
> Two For Bartenders.
>
> P.S.  Please don't write the movies.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>   
Huh?

Nicol

-- 

The three things to remember about Llamas:
1) They are harmless
2) They are deadly
3) They are made of lava, and thus nice to cuddle. 




From gagsl-py2 at yahoo.com.ar  Sun May  4 01:33:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 04 May 2008 02:33:10 -0300
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
Message-ID: <op.ual61kdox6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegill7 at gmail.com> escribi?:

> Is there a good place to look to see where I can find some code that
> will help me to save webpage's links to the local drive, after I have
> used urllib2 to retrieve the page?
> Many times I have to view these pages when I do not have access to the
> internet.

Don't reinvent the wheel and use wget
http://en.wikipedia.org/wiki/Wget

-- 
Gabriel Genellina



From stevegill7 at gmail.com  Tue May 13 20:12:31 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 13 May 2008 17:12:31 -0700 (PDT)
Subject: downloading a link with javascript in it..
References: <5358bfb4-f79a-4575-98b8-9a85ba41652d@d45g2000hsc.googlegroups.com>
	<68rmafF2t1vboU1@mid.uni-berlin.de>
Message-ID: <2e9d8a88-2f40-4f1d-bcba-b57791a4b9fb@l42g2000hsc.googlegroups.com>

On May 12, 4:06 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jetus schrieb:
>
>
>
> > I am able to download this page (enclosed code), but I then want to
> > download a pdf file that I can view in a regular browser by clicking
> > on the "view" link. I don't know how to automate this next part of my
> > script. It seems like it uses Javascript.
> > The line in the page source says
> > href="javascript:openimagewin('JCCOGetImage.jsp?
> > refnum=DN2007036179');" tabindex=-1>
>
> > So, in summary, when I download this page, for each record, I would
> > like to initiate the "view" link.
> > Can anyone point me in the right direction?
>
> > When the "view" link is clicked on in IE or Firefox, it returns a pdf
> > file, so I should be able to download it with
> > urllib.urlretrieve('pdffile, 'c:\temp\pdffile')
>
> > Here is the following code I have been using
> > ----------------------------------------------------------------
> >     import urllib, urllib2
>
> >     params = [
> >                 ('booktype', 'L'),
> >                 ('book', '930'),
> >                 ('page', ''),
> >                 ('hidPageName', 'S3Search'),
> >                 ('DoItButton', 'Search'),]
>
> >     data = urllib.urlencode(params)
>
> >     f = urllib2.urlopen("http://www.landrecords.jcc.ky.gov/records/
> > S3DataLKUP.jsp", data)
>
> >     s = f.read()
> >     f.close()
> >     open('jcolib.html','w').write(s)
>
> Use something like the FireBug-extension to see what the
> openimagewin-function ultimately creates as reqest. Then issue that,
> parametrised from parsed information out of the above href.
>
> There is no way to interpret the JS in Python, let alone mimic possible
> browser dom behavior.
>
> Diez

Thanks Diez;
Never used Firebug, and could not find the http-header section, but it
lead me to Tamper Data, and that was perfect to give me the headers.
Thanks for the input.


From wizzardx at gmail.com  Sun May  4 10:41:37 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 16:41:37 +0200
Subject: Image grab in Python
In-Reply-To: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
References: <eba8281a0805040725m342e9b5by9275091708a1eaa7@mail.gmail.com>
Message-ID: <18c1e6480805040741p8c76a33q2f5464932b6524ff@mail.gmail.com>

On Sun, May 4, 2008 at 4:25 PM, Valerio Valerio <vdv100 at gmail.com> wrote:
> Hi,
>
> anyone know a Python library to grab the size of a selected image region
> (the selection will be made with the mouse), that work in Linux ?

You might be able to use this tool:

http://freshmeat.net/projects/gtkshots/

David.


From kurosknight at gmail.com  Sun May 25 17:00:12 2008
From: kurosknight at gmail.com (Kuros)
Date: Sun, 25 May 2008 17:00:12 -0400
Subject: Storing a function
Message-ID: <fe46746a0805251400g47c08a74gd63625330a8e547f@mail.gmail.com>

Hi,
Hoping I could get some help with a python question.

I want to be able to store the code for a single function in a .py file,
such as:

def test():
    print "Test"

>From within a Python script, I would like to be able to get a handler so I
can do something like:

handler.test()

I want to be able to store the handlers in a blob in a SQLite DB.
Essentially, I want to store a compiled version of a function. I have tried
using compile() and exec, and while it sort of works, it seems to import the
code into the global namespace. I can do:

x = compile(file.read(), "<x>", 'exec')
exec x
test()

and it calls test, but I may have several functions with the same name, all
read from different files. So I need to be able to do handler.test().

Any advice would be greatly appreciated!

-Kuros
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From kamhung.soh at gmail.com  Sat May 17 02:54:52 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sat, 17 May 2008 16:54:52 +1000
Subject: set function
References: <aa405c1f0805162249u45280c76v82f72daa0a748635@mail.gmail.com>
Message-ID: <op.ubadhqb6ev04yd@hungvista>

On Sat, 17 May 2008 15:49:05 +1000, Beema shafreen  
<beema.shafreen at gmail.com> wrote:

> Hi all,
> I need to find the intersection of 10 different files with ids defined as
> a_items, b_items and so on
>
> common_items = a_items&b_items&c_items&\
>                d_items&e_items&f_items\
>                &g_items&h_items&i_items&j_items
>
> i have included above line in the script
> is this an right way will my program accept it or what are the other  
> option
> to compare 10 different such items

See "Set Types", http://docs.python.org/lib/types-set.html.  Example:

s1 = set([1,2,3])
s2 = set([3,4,5])
s1 & s2
set([3])

You can populate your sets using an iterable, such as the lines from a  
file.  Example:

s1 = set(file(r'blah.txt'))

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From drobinow at gmail.com  Thu May 22 18:14:12 2008
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Thu, 22 May 2008 15:14:12 -0700 (PDT)
Subject: 2 different versions of python compiling files.
References: <22196543-5198-4424-a4e9-db83894b0385@a70g2000hsh.googlegroups.com>
	<l2kZj.14027$Xv3.1854@bignews4.bellsouth.net>
	<a3c1cd0b-4d7e-419c-aa44-6445cdf76e48@z72g2000hsb.googlegroups.com>
Message-ID: <27edaccd-d3a4-4bcc-a471-a71d8397983d@f36g2000hsa.googlegroups.com>

On May 22, 3:56 pm, TkNeo <tarun.... at gmail.com> wrote:
> On May 22, 2:44 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
> wrote:
>
>
>
> > TkNeo wrote:
> > > I am trying to upgrade from python 2.3 to 2.4 but not all machines can
> > > be upgraded. Can you guys tell me if this scenario is possible.
>
> > > 1. Any machine that uses .py files that use libraries that require 2.4
> > > will have 2.4 on it.
> > > 2. rest of the machines will have 2.3
>
> > > now there is a shared drive. lets say i write a new library called
> > > testlib.py and put it on the shared drive .. when a script uses it
> > > from a 2.4 based machine, it will generate a testlib.pyc and leave it
> > > on the shared drive. going forward that .pyc is used until the
> > > original lib is changed. now lets say a 2.3 based machine is trying to
> > > use that lib. it will try to use that pyc file which was compiled by
> > > py2.4. will it work or crash ?
>
> > It should work, as long as the original .py file is still there.  Each Python
> > version will check for a .pyc file *corresponding to that version* (e.g. Python
> > 2.4 will look for a .pyc file compiled with 2.4), and create one if it doesn't
> > exist, overwriting any existing .pyc file in the process.
>
> > If the original .py file is *not* there, it will most likely not work.  If you
> > try to import a .pyc file with the wrong version number, you get something like
> > this:
>
> >  >>> import foo
> > Traceback (most recent call last):
> >    File "<stdin>", line 1, in ?
> > ImportError: Bad magic number in foo.pyc
>
> > I'm not sure what would happen if multiple Pythons try to write a .pyc file at
> > the same time, though...
>
> > --
> > Hans Nowak (zephyrfalcon at gmail dot org)http://4.flowsnake.org/
>
> The original .py will always be there but you know what, multiple
> python versions from different computers do access that one library at
> the same time.
>
> Anyone know a possible solution ?

What error message are you getting?


From pscott at uwc.ac.za  Mon May  5 10:36:27 2008
From: pscott at uwc.ac.za (Paul Scott)
Date: Mon, 05 May 2008 16:36:27 +0200
Subject: Nested os.path.join()'s
In-Reply-To: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>
References: <20080505143412.6859.316397324.divmod.quotient.59054@ohm>
Message-ID: <1209998187.7106.34.camel@paul-laptop>


On Mon, 2008-05-05 at 10:34 -0400, Jean-Paul Calderone wrote:
> How about not nesting the calls?
> 
>     >>> from os.path import join
>     >>> join(join('x', 'y'), 'z') == join('x', 'y', 'z')
>     True
>     >>>
> 

Great! Thanks. Didn't realise that you could do that... :)

--Paul

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From paul.hankin at gmail.com  Wed May  7 17:23:22 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 7 May 2008 14:23:22 -0700 (PDT)
Subject: letter frequency counter / your thoughts..
References: <5a9a4a7e-a4a3-4a59-a80f-01d44bc69a86@w1g2000prd.googlegroups.com>
Message-ID: <2dcc24c4-a9df-438f-bf6e-6ebf7fdfd0bf@l42g2000hsc.googlegroups.com>

On May 7, 5:39?pm, umpsu... at gmail.com wrote:
> Here is my code for a letter frequency counter. ?It seems bloated to
> me and any suggestions of what would be a better way (keep in my mind
> I'm a beginner) would be greatly appreciated..

Yours is a little more efficient than this, but here's a compact way
to write what you want.

import heapq

def mostfreq(message):
    return heapq.nlargest(3, set(message), key=message.count)

--
Paul Hankin


From dax2006 at googlemail.com  Mon May  5 11:02:41 2008
From: dax2006 at googlemail.com (WorldWide)
Date: Mon, 5 May 2008 08:02:41 -0700 (PDT)
Subject: Interested to code leecher mods in python?
Message-ID: <e328b3dc-2f80-49b2-8ebb-2351f13c6b09@27g2000hsf.googlegroups.com>

Hi. Is here anyone interested to help us code some bittorrent leecher
mods?
We need a bit help with the gui in the mods.
You just need to have python knowledge.
We have our own [quite successful] forums and a great team.

Please email me: dax2006 at gmail.com

best regards


From kyosohma at gmail.com  Thu May 22 14:58:02 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 22 May 2008 11:58:02 -0700 (PDT)
Subject: Restarting a program
References: <fb438093-348c-4ff0-8e58-e99b71af087f@y22g2000prd.googlegroups.com>
	<52fd6be0-41f9-4c84-b165-7fd9ce998c42@p25g2000hsf.googlegroups.com> 
	<26169d93-32c4-412e-aa15-e6015c0204bb@z24g2000prf.googlegroups.com>
Message-ID: <a71352c3-a9db-41ac-a176-1bd9645b006e@x41g2000hsb.googlegroups.com>

On May 22, 1:38?pm, Geoldr <geo... at gmail.com> wrote:
> On May 22, 10:07?am, Mike Driscoll <kyoso... at gmail.com> wrote:
>
>
>
> > On May 22, 10:59?am, Geoldr <geo... at gmail.com> wrote:
>
> > > Hello all, I have written a simple program, and at the end of it,
> > > instead of it closing I would like it to restart from the beggining.
> > > Is there a way to do this? Put my code into a class function, or
> > > something?
> > > I guess I could do a while loop, but I think if there is a way to run
> > > my code if it's in a class would be an easier option. I can't seem to
> > > find many guides online but maybe I have not been looking in the right
> > > places.
>
> > > Anybody have any ideas?
>
> > Putting your code in a function or class is probably the way to go.
> > When I was doing C++, we'd just use a while loop for simple stuff,
> > though.
>
> > It really shouldn't be all that hard to tell the code to call up the
> > beginning of the program again.
>
> > Mike
>
> That's what I am trying to figure out, but it doesn't seem to work. Do
> you have any example code of classes/functions that work for you?

No...but I through some concept code together that does the basics:

<code>

def repeater():

    for i in range(10):
        print i

def main():
    ret = 'Y'
    while 1:
        if ret.upper() == 'Y':
            repeater()
        else:
            print 'Program finished...goodbye!'
            break
        ret = raw_input('Do you want to continue? (Y/N)')

if __name__ == '__main__':
    main()

</code>

I found that using the while was the easiest to create on short
notice. You could probably do it with recursion too, but I'm not
especially good at that.

Another idea is to have some kind of sentinel value that both
functions can access and use it somehow to tell whether or not to
repeat.

Hope that helps you get going.

Mike


From asmodai at in-nomine.org  Fri May  2 01:12:44 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Fri, 2 May 2008 07:12:44 +0200
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
In-Reply-To: <87abj91j8u.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87abj91j8u.fsf@benfinney.id.au>
Message-ID: <20080502051244.GP78165@nexus.in-nomine.org>

-On [20080502 05:26], Ben Finney (bignose+hates-spam at benfinney.id.au) wrote:
>I've never clearly understood why people want to use "#! /usr/bin/env
>python", which is prone to finding a different Python from the one
>installed by the operating system. I'd be interested to see what
>responses are in favour of it, and what the reasoning is.

Simple, some systems are not as peculiar as a lot of Linux boxes which
chug everything into /usr/bin, which is OS territory (as has been decreed
long ago by hier(7)), but rather use /usr/local/bin (all BSD Unix and
derivatives) or /opt or whatever convention a particular operating system
has.

And prone to find the wrong Python, it all depends upon proper $PATH
administration.

As such, your script with #!/usr/bin/python is as bad as an ash shell script
with #!/bin/bash. #!/usr/bin/env python is more cross-OS friendly, there's
more than just Linux you know.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
I dream of Love as Time runs through my hand...


From jenn.duerr at gmail.com  Wed May 14 14:10:37 2008
From: jenn.duerr at gmail.com (Jennifer Duerr)
Date: Wed, 14 May 2008 11:10:37 -0700 (PDT)
Subject: SOAP/ZSI post/get for Java Web App
References: <dab8f156-258a-44cc-a33d-19c8bebfaf5a@u6g2000prc.googlegroups.com>
	<c36592e2-8a07-4445-9d71-bfffd6d807fd@27g2000hsf.googlegroups.com>
Message-ID: <2a0dae47-e141-476c-a0fd-a5c595edc354@q1g2000prf.googlegroups.com>

On May 14, 12:59?pm, Waldemar Osuch <waldemar.os... at gmail.com> wrote:
> On May 13, 1:02 pm, Jennifer Duerr <jenn.du... at gmail.com> wrote:
>
>
>
>
>
> > All,
>
> > I need help concerning SOAP, Python and XML. I am very new to this, so
> > dumbing it down for me will not offend me!
>
> > I'm using Python and want to send a user-inputted string to an
> > existing Java web app that
> > will output results to XML. I need to capture elements of the XML and
> > put
> > the info into a table. (say I send a single/simple address string to
> > this
> > webservice/geocode, which then returns numerous possible matches with
> > XY
> > values and score values, and I want to capture that into a table)
>
> > How do I go about doing this? I'm told I need to use SOAP. I
> > discovered that
> > the best module to use is ZSI (please correct me if I'm wrong). I have
> > installed the necessary module. Examples I have seen are plenty and
> > all so different, its not clear to me how to go about. ?I have been
> > spinning my wheels for too long on this!
>
> > Can someone provide some example code similar to what I need to do? Or
> > any
> > guidance would be appreciated.
>
> > Thanks!
>
> It looks like you have three tasks here:
> ?- get data
> ?- parse it
> ?- store it
>
> SOAP could be the means to accomplish only the first one.
>
> If the service you use exposes the functionality using XML-RPC or some
> REST-ful methods I would try them first. ?If it does not, then
> you are stuck with SOAP. Using SOAP in Python is currently
> not as straightforward as it could be.
>
> You have chosen to use ZSI and that is fine choice.
> In documentation look for "wsdl2py".
> Given a URL to a WSDL file it will generate stub class definition
> with methods corresponding to the SOAP service methods.
> In your code you would instantiate the class, call the method you want
> and grab the payload. ?Your first task is done.
>
> From what I understand the payload will be XML that will need to be
> parsed. ?For that you could use the excellent ElementTree
>
> If I were you I would investigate suds (https://fedorahosted.org/suds)
> It promises to be easier to use than ZSI. ?The README has the usage
> example.
>
> Waldemar- Hide quoted text -
>
> - Show quoted text -

Thanks for your reply.
I got some help from a fellow co-worker.  We worked out this, so far.
Seems to be working...

[[my url is local, so use another, and also then choose an appropriate
value for the user_input var]]
import urllib, urllib2
from xml.dom import minidom

user_input = 'xyz'
url = 'http://xxx.....' #geocoding servlet url
values = {'address': user_input} #

data = urllib.urlencode(values)
req = urllib2.Request(url, data)
response = urllib2.urlopen(req)
xmlResults = response.read()
#print xmlResults

xmldoc = minidom.parseString(xmlResults)
places = xmldoc.getElementsByTagName('Placemark')

nameTag = places[0].getElementsByTagName('name')
print nameTag[0].firstChild.wholeText

descriptionTag = places[0].getElementsByTagName('description')
print descriptionTag[0].firstChild.wholeText

coordinatesTag = places[0].getElementsByTagName('coordinates')
print coordinatesTag[0].firstChild.wholeText


From mail at timgolden.me.uk  Fri May  9 16:55:48 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 09 May 2008 21:55:48 +0100
Subject: Not able to get utf8 encoded string into a document
In-Reply-To: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>
References: <4AE25A7D8CBE4E4DA8E87173237DE27E258C51@blums0042.bluelnk.net>
Message-ID: <4824BA54.1020308@timgolden.me.uk>

Lawrence, Anna K (US SSA) wrote:
> I am working on a web application using Pylons .0.9.6, SQLAlchemy 0.4.4, 
> MySQLdb 1.2.2 and Python 2.4.4.
> 
> We want to use utf8 encoding throughout and as far as I can see 
> everything is set properly between components and I?ve got a 
> sitecustomize.py in my site-packages directory of python set to utf8 as 
> well.  Everything is stored properly in the database and displays nicely 
> in the app.  However, when I try to take a string that is coming out of 
> the database and export it to a Word document, no amount of 
> encoding/decoding will make the Word doc display properly.
 >
> Since I?m on a Windows machine, my default locale is cp437.  Is this the 
> reason?

 From where I'm sitting, I can't see enough to help. The crucial
thing seems to be in this phrase: "When I try to take a string that
is coming out of the database and export it to a Word document,
no amount of encoding/decoding will make the Word doc display properly".
It presumably doesn't matter what web framework etc. you're using:
you either get a unicode object or an encoded string from the database
and you're putting that in a Word doc. Is that correct?

Can you provide a sample of code which shows what you're doing, and
explain what does / doesn't happen? By way of trying to get closer,
there's a Noddy example below:

<code>
import win32com.client

word = win32com.client.gencache.EnsureDispatch ("Word.Application")
word.Visible = 1
doc = word.Documents.Add ()
doc.Range ().Text = u"poup\u00e9e"

</code>

Now, on my Win2K machine this displays perfectly well in word with
the French word poupee with the penultimate e having an acute
accent. So, translating this minimalist example into your situation,
what happens when you try doing this?

TJG


From rhamph at gmail.com  Wed May  7 12:04:33 2008
From: rhamph at gmail.com (Rhamphoryncus)
Date: Wed, 7 May 2008 09:04:33 -0700 (PDT)
Subject: FreeBSD KeyboardInterrupt not captured
References: <96da774d-2746-4c5e-9947-e36860dd7461@p39g2000prm.googlegroups.com>
Message-ID: <025274b5-4b4e-4f50-ad8f-c4a4b688f5f8@w8g2000prd.googlegroups.com>

On May 7, 5:00 am, radim.ma... at gmail.com wrote:
> Hi Guys,
>
> during testing of my project on FreeBSD I've discovered stange
> 'feature' of time.sleep(). It works if single thread is running, but
> when multi-threaded, the SIGINT signal seems not to be handled in same
> way.
>
> I've found three discussion about similar behavior with os.system()
> but so far none of the suggested patches worked.
>
> I've limited test to following code:
>
> import time
> import sys
> import threading
>
> class MyThread(threading.Thread):
>         def __init__(self):
>                 super(MyThread, self).__init__()
>                 self.start()
>
>         def run(self):
>                 while True:
>                         try:
>                                 time.sleep(10)
>                         except KeyboardInterrupt:
>                                 print 'thread keyboard interrupt'
>
> def main():
>         my = MyThread()
>
>         while True:
>                 try:
>                         time.sleep(5)
>                 except KeyboardInterrupt:
>                         print 'got it'
>
> if __name__ == '__main__':
>         main()
>
> Any suggestions?

Python doesn't support interrupting non-main threads with a signal.
You have to use something else you can manually end, like a Condition
with a timeout or a poll of a fd with a timeout.


From ivan.illarionov at gmail.com  Mon May 12 06:04:17 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 10:04:17 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
	<g08pnf$2lbi$1@news.mtu.ru> <877ie06kdl.fsf@benfinney.id.au>
Message-ID: <g094n0$2o91$1@news.mtu.ru>

>> On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote: [...]
>> > That is also regrettably common in Python code. It still suffers from
>> > being unnecessarily ambiguous, since there are *also* plenty of loops
>> > using 'i', 'j', etc. where the loop counter *is* used.
>> > 
>> > Differentiating these use cases by appropriate naming is, IMO, worth
>> > the effort of choosing a meaningful name.
>> 
>> Even if the counter is not used inside the loop's body it's still in
>> control of the whole loop
> 
> Not in Python it's not. The values that come out of the iterator aren't
> "in control of the loop". The state for the loop is in the *iterator*,
> not the values that come out.
> 
> Having access to the values that come from the iterator is usually
> useful, but regardless of whether one uses them or not, they're *not*
> controlling the loop, and it's confusing to imply that they are.

I agree that "in control" was incorrect phrase.
 
> So, when not using the values that come from the controlling iterator,
> it's good to make that explicit. If Python supported it, we might prefer
> to use no name at all for something that isn't used, but the 'for'
> syntax doesn't allow that.
> 
> In the absence of supporting syntax, the next best thing is to choose a
> name that *does* make it explicit that the values will not be used.

Name 'i' does not imply whether it's used inside the loop or not.
IMO it perfectly covers both cases.

It may have small advantage to "make it explicit that the values will not 
be used", but names like "dummy", "unused", "ignored" or "junk" can be 
confusing for some people and break the established conventions for 
counter variable names (and these conventions are reasonable and are 
taken from mathematics). "i" is still the best choice.

And let's agree to disagree. It's clear that we have different opinions 
and it looks that this discussion is not going to change them.

-- Ivan


From zhalbrecht at gmail.com  Tue May 20 12:57:26 2008
From: zhalbrecht at gmail.com (Zack)
Date: Tue, 20 May 2008 09:57:26 -0700 (PDT)
Subject: Accumulating values in dictionary
References: <07fbc8ec-924a-4e90-b212-ca4cc66f2b85@i76g2000hsf.googlegroups.com>
Message-ID: <0ad9656b-0624-43aa-b45f-29ec82471797@24g2000hsh.googlegroups.com>

On May 20, 12:26 pm, Zack <zhalbre... at gmail.com> wrote:
> Given a bunch of objects that all have a certain property, I'd like to
> accumulate the totals of how many of the objects property is a certain
> value. Here's a more intelligible example:
>
> Users all have one favorite food. Let's create a dictionary of
> favorite foods as the keys and how many people have that food as their
> favorite as the value.
>
> d = {}
> for person in People:
>     fav_food = person.fav_food
>     if d.has_key(fav_food):
>         d[fav_food] = d[fav_food] + 1
>     else:
>         d[fav_food] = 1
>
> d ends up being something like: {'pie': 400, 'pizza': 200, 'burgers':
> 100} if 400 people like pie, 200 like pizza and 100 like burgers.
>
> There's nothing wrong (that I know of) by doing it as I have up there,
> but is there a simpler, easier way? Looking forward to hearing about
> how much of a n00b I am. Thanks in advance!

Er. OK so I realize now that I could have just done this:

d = {}
for person in people:
    fav_food = person.fav_food
    d[fav_food] = d.get(fav_food, 0) + 1



From castironpi at gmail.com  Tue May 13 11:08:42 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 13 May 2008 08:08:42 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com>
Message-ID: <7ff9c6b7-ed99-49eb-8dce-9749b1287f7e@i76g2000hsf.googlegroups.com>

Just catch throw, stuff, and information.  I think it's fine.  I have
an hour to write some code.  Who wants parity stuff?

On May 13, 8:46?am, Sanoski <Joshuajr... at gmail.com> wrote:
> Any programming that helps you solve a problem is fun and
> recreational. At least, that's how I look at it. I suppose it really
> depends on why you're doing it, what your objective is, etc. But I'd
> say, why not?
>
> Tron! That's one I haven't seen in awhile. I'll have to take a mental
> note to rent the movie again someday. I always thought a game based on
> the movie hackers would be cool. Actually not based on the movie
> itself, but on that 3D computer world they kept breaking into. Ah man,
> it's so funny looking back on that film. Gibson, that's what they
> called it. It was like a 3D database. That in itself wouldn't make a
> very good game, but I suppose one could easily be created around that
> idea. Perhaps it could be combined with Lawnmower-man. You're somehow
> trapped in this 80's looking 3D world that has access to all the
> world's information. More stuff could be thrown in to make it more
> interesting. And of course, there would have to be hidden references
> or parodies to whatever movies inspired it.
>
> Good luck with your project
>
> Sincerely,
> Joshua
>
> On May 13, 9:02?am, castiro... at gmail.com wrote:
>
>
>
> > Hi all.
>
> > I am trying to write to the Python newsgroup. ?I doubt (aha, but
> > doubt) that I have come to the right place. ?(Incoming "this"!) ?Is
> > this the Python newsgroup? ?I heard it was called comp.lang.python.
> > Now to repeat the subject line. ?I'm stuck in Python.
>
> > Now that was fun. ?I will also try to enumerate simple screen savers
> > (graphicals, graphiclizers). ?It may be profitable on some non-bank-
> > breaking scale to compile the results. ?Shall I proceed? ?The risk is
> > "overunity", such that one person can't be at liberty to live, which
> > in some technical political arenas would be an "anarchy", but there
> > are sufficiently many of those that I will too.
>
> > Does anyone want such a list, or if not, is it at least fun and
> > recreational to make it? ?The dollar would come along the lines of
> > PowerPoint (name (tm)), so it may be free to do it, very entertaining,
> > and peaceable. ?(As the above would show, you would be free to
> > approach me to -buy-; I won't oversell.) ?I like programming. ?(And is
> > Guido getting his fair share? ?I am prepared to share with him.)
> > Check in his name.
>
> > I want to try to ally with other programmers and make cool games, like
> > Tron, that one party can make games for on a console, such as live
> > obstacles, incl. tear-down, and certain people have to play from time
> > to time. ?But you can't charge to do it, so it's a guaranteed game.
> > (That in virtue of that I'm typing.) ?Advantages include microspacing
> > of time. ?Very summer.
>
> > Resemblances would include Dungeons & Dragons with multi-host, or
> > multi-ref small-shooter sport-likers. ?The real-time is definitely
> > attractive (duh). ?As for voice, it's not clear it's the most
> > entertaining, but I just don't have a mic.
>
> > However, forseeing, I return with sailing, but that's in 3-space and
> > not even in code, as though we'd construct the Royal Navy and battle.
> > But I think we can keep it well.
>
> > Thing is, someone has to play it to keep a synch (keep from falling),
> > and tap-outs would have to live.
>
> > Side note: In political theory, this is known as the problem of
> > nominating a successor. ?Would it stay afloat, even for long enough to
> > make it worth the negatives, yes which do include tear-down and fall,
> > invasion of privacy, and rights infrigement?
>
> > I code in Python (get the callbacks), but configurable servers could
> > spread the work out, using relays to put each person on each's own
> > turf to be a ref. ?If you feed the roles, it could get really fun, and
> > c-l-py is the appropriate place to start such a thing, both and ask if
> > it's been done before.- Hide quoted text -
>
> - Show quoted text -



From gherron at islandtraining.com  Sun May  4 03:16:41 2008
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 04 May 2008 00:16:41 -0700
Subject: is +=1 thread safe
In-Reply-To: <8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
References: <4819DA2D.3030508@ggmail.com>	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com>
	<yfswsmbf0gm.fsf@gmail.com>	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
Message-ID: <481D62D9.8090200@islandtraining.com>

Carl Banks wrote:
> On May 3, 7:44 pm, Gary Herron <gher... at islandtraining.com> wrote:
>   
>> Alexander Schmolck wrote:
>>     
>>> AlFire <spamgrinder.tryla... at ggmail.com> writes:
>>>       
>>>>> The threading module already has a function to return the number of Thread
>>>>> objects currently alive.
>>>>>           
>>>> I have threads within threads - so it does not suit me :-(.
>>>>         
>>> How about using a scalar numpy array? They are mutable, so I assume that x +=
>>> 1 should be atomic.
>>>       
>> No NO NO! The only way to increment a variable in memory is through a
>> three step process:
>>     
>
> Yes, this will be atomic.  It's a pretty good idea, in fact.  The
> underlying increment operation is protected by the GIL; it could be
> three, forty, or a hundred steps and it'd be atomic at the Python
> level.
>
>   

But... It's not!  

A simple test shows that.   I've attached a tiny test program that shows 
this extremely clearly.  Please run it and watch it fail.  In this test, 
two threads both increment a shared global variable 1 million times.  
This should end with a value of 2 million, but it rarely does so.   
(Actually it has *never* done so yet.)

The GIL makes sure no two Python threads are running at the same time,  
and from that you can conclude that Python virtual machine instructions 
are atomic, but you cannot conclude that Python statements/expression 
are atomic.  Any Python statement or expression that compiles into more 
than one OP code can be interrupted between those OP codes, and this can 
cause devastating results to the interrupted statement.

Gary Herron


> Carl Banks
> --
> http://mail.python.org/mailman/listinfo/python-list
>   

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From benjamin.kaplan at case.edu  Sun May 11 21:05:34 2008
From: benjamin.kaplan at case.edu (Benjamin Kaplan)
Date: Sun, 11 May 2008 21:05:34 -0400
Subject: how to separate words from a string?
In-Reply-To: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>
References: <5dc598e30805111715k43114274jbc4b7c0bf4158494@mail.gmail.com>
Message-ID: <ec96e1390805111805t6a16362bo3a9c5be23d030154@mail.gmail.com>

On Sun, May 11, 2008 at 8:15 PM, David Anderson <zerty.david at gmail.com>
wrote:

> Hi, how can I separate words from a sentence in a string? Like the
> java.String.split method
> I need something that gets an string "This is a sentence", and return to em
> a list["This","is","a","sentence"]
> Can anyone help?
> Thx
>

You should probably look in the docs before posting here. Python strings
also have a split method, that does the same thing as in java.
http://docs.python.org/lib/string-methods.html
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From python at bdurham.com  Thu May  8 10:54:15 2008
From: python at bdurham.com (python at bdurham.com)
Date: Thu, 08 May 2008 10:54:15 -0400
Subject: Generate labels for a multi-level outline (THANK-YOU!)
In-Reply-To: <_vKdnaV5jOajFr_VnZ2dnUVZ_gudnZ2d@earthlink.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>
	<mailman.713.1210185133.12834.python-list@python.org>
	<_vKdnaV5jOajFr_VnZ2dnUVZ_gudnZ2d@earthlink.com>
Message-ID: <1210258455.4676.1252105925@webmail.messagingengine.com>

Dennis,

> I was a touch bored in the last hour at work today so...

Thank you!!

Malcolm


From mathieu.prevot at gmail.com  Wed May 28 07:40:48 2008
From: mathieu.prevot at gmail.com (Mathieu Prevot)
Date: Wed, 28 May 2008 13:40:48 +0200
Subject: Flash Decoder
In-Reply-To: <6a4rtbF35ut5sU1@mid.uni-berlin.de>
References: <860bf237-18d3-4949-a26d-97becafb27c8@i36g2000prf.googlegroups.com>
	<6a4rtbF35ut5sU1@mid.uni-berlin.de>
Message-ID: <3e473cc60805280440k7156b74cla6342419359441cd@mail.gmail.com>

2008/5/28 Diez B. Roggisch <deets at nospam.web.de>:
> Ankit wrote:
>
>> Hi everyone,i wanted to build a flash decoder using python can
>> somebody tell me which library to use and what steps should i follow
>> to make a flash(video) decoder?By a decoder i mean that i need to
>> display all the pixel values of each frame.Waiting for your replies.
>
> Check out libffmpeg. It should be accessible using python by various means,
> including gstreamer or ctypes.
>
> This is however a rather advanced topic.
>
> Diez

I think you might want make an ffmpeg/libffmpeg python wrap. It could
be really useful, and faster than a pure python decoder. Even for fun.

Cheers
Mathieu


From christof.ecker at googlemail.com  Fri May 23 04:31:41 2008
From: christof.ecker at googlemail.com (christof)
Date: Fri, 23 May 2008 01:31:41 -0700 (PDT)
Subject: KeyError in pickle
Message-ID: <6eb38a0e-1ecc-46f7-92b7-1dd816efe206@8g2000hse.googlegroups.com>

Hi,

I am using pickle/unpickle to let my program save its documents to
disk. While this it worked stable for a long time, one of my users now
complained, that he had a file which can't be loaded.

The traceback is:

    File "pickle.pyo", line 1374, in loads
    File "pickle.pyo", line 858, in load
KeyError: 'A'


Does anybody know this problem. How this can happen and how can I
avoid it?

Thanks,
Christof


From ptmcg at austin.rr.com  Tue May 13 09:58:17 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 13 May 2008 06:58:17 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com> 
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com> 
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com> 
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com> 
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
Message-ID: <2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>

On May 13, 8:32?am, Dave Parker <davepar... at flamingthunder.com> wrote:
> > Don't let yourself be irritated by castironpi
>
> I'm not the sort to get irritated by anyone. ?There is value in all
> interaction.

Not this interaction, I'm afraid.  What irritates *me* about
castironpi is that he uses a chatterbot to clutter up the threads
here.  If you go back to his postings from a year ago (and selected
ones since), his comments are coherent and sensible.  These rambling
stream-of-consciousness rants about t.v.'s and coffee are (I guess)
his idea of a joke.  But they are certainly not worth your time in
trying to respond to them.

-- Paul


From allendowney at gmail.com  Thu May 29 12:07:01 2008
From: allendowney at gmail.com (allendowney at gmail.com)
Date: Thu, 29 May 2008 09:07:01 -0700 (PDT)
Subject: should I put old or new style classes in my book?
Message-ID: <b9201cbc-5e24-480f-ba55-44227b622c6d@c19g2000prf.googlegroups.com>

Hi All,

I am working on a revised edition of How To Think Like a Computer
Scientist,
which is going to be called Think Python.  It will be published by
Cambridge
University Press, but there will still be a free version under the GNU
FDL.

You can see the latest version at thinkpython.com; I am revising now,
so
I welcome all comments, suggestions, corrections, etc.

Anyway, I am posting to ask about the current status of new style
classes.
I am planning to present only one style in the book, because the
differences
between them don't matter for anything I am doing in the book.

The current edition of the book presents old style classes.  I am
considering
switching to new style classes on the assumption that this should be
the default
choice for new programs.  The drawback is that a lot of the online
documentation
still uses old style classes.

Thanks for any guidance you can provide.

Cheers,
Allen



From tjreedy at udel.edu  Wed May 14 12:58:12 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 May 2008 12:58:12 -0400
Subject: [off-topic] Usenet
References: <6bafdf82-cf8a-42cd-9f72-d98a39fab5b5@j22g2000hsf.googlegroups.com>
	<Xns9A9EA1FF16358duncanbooth@127.0.0.1>
Message-ID: <g0f5n0$939$1@ger.gmane.org>


"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message 
news:Xns9A9EA1FF16358duncanbooth at 127.0.0.1...
| I also recommend Gmane which provides a free news server for most mailing
| lists: mailing lists are a lot more manageable when gatewayed into a news
| server. If you just want to access comp.lang.python I think you'll find 
the
| mailing list to which it is connected is available for free on Gmane.

gmane.comp.python.general

which is where I am answering this from.  Works great. 





From kyosohma at gmail.com  Thu May  1 12:26:38 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 09:26:38 -0700 (PDT)
Subject: PyGame, window is not closing, tut not helping
References: <2cda1f18-2ebd-49a2-8359-e922d9d1451e@m73g2000hsh.googlegroups.com>
Message-ID: <a866c7f5-9429-4b28-b68c-b4ff6763072a@x41g2000hsb.googlegroups.com>

On May 1, 10:55?am, globalrev <skanem... at yahoo.se> wrote:
> im doing this :http://www.learningpython.com/2006/03/12/creating-a-game-in-python-us...
>
> and when closing the program the window stays up and doesnt respond. i
> tried adding this:http://www.pygame.org/wiki/FrequentlyAskedQuestions
>
> bu it doesnt work, or maybe im doing it wrong.
>
> heres the code without the added tutorial exit:
>
> import os, sys
> import pygame
> from pygame.locals import *
>
> if not pygame.font: print 'Warning, fonts disabled'
> if not pygame.mixer: print 'Warning, sound disabled'
>
> class PyManMain:
> ? ? """The Main PyMan Class - This class handles the main
> ? ? initialization and creating of the Game."""
>
> ? ? def __init__(self, width=640,height=480):
> ? ? ? ? """Initialize"""
> ? ? ? ? """Initialize PyGame"""
> ? ? ? ? pygame.init()
> ? ? ? ? """Set the window Size"""
> ? ? ? ? self.width = width
> ? ? ? ? self.height = height
> ? ? ? ? """Create the Screen"""
> ? ? ? ? self.screen = pygame.display.set_mode((self.width
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?, self.height))
>
> ? ? def MainLoop(self):
> ? ? ? ? """This is the Main Loop of the Game"""
> ? ? ? ? while 1:
> ? ? ? ? ? ? for event in pygame.event.get():
> ? ? ? ? ? ? ? ? if event.type == pygame.QUIT:
> ? ? ? ? ? ? ? ? ? ? sys.exit()
>
> class Snake(pygame.sprite.Sprite):
> ? ? """This is our snake that will move around the screen"""
>
> ? ? def __init__(self):
> ? ? ? ? pygame.sprite.Sprite.__init__(self)
> ? ? ? ? self.image, self.rect = load_image('snake.png',-1)
> ? ? ? ? self.pellets = 0
>
> if __name__ == "__main__":
> ? ? MainWindow = PyManMain()
> ? ? MainWindow.MainLoop()

I think the issue is that you're running it from within IDLE. It looks
like pyGame's event loop and Tkinter's event loop interfere with each
other. If you run the scripts from the command line, it works.

Mike


From straton at lampsacos.demon.co.uk  Sat May 17 21:24:49 2008
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Sun, 18 May 2008 02:24:49 +0100
Subject: addendum Re: working with images (PIL ?)
In-Reply-To: <g0fbdf$jp$1@aioe.org>
References: <g0fbdf$jp$1@aioe.org>
Message-ID: <g0o0h3$jd4$1$8300dec7@news.demon.co.uk>

As others have said, PIL has the 'histogram' method to do most of the 
work. However, as histogram works on each band separately, you have
a bit of preliminary programming first to combine them.

The ImageChops darker method is one easy-to-understand way (done twice),
but there are lots of alternatives, I am sure.


# ------------------------------------

import Image
import ImageChops

Im = Image.open("\\\\server\\vol\\temp\\image.jpg")
R,G,B = Im.split()

Result=ImageChops.darker(R,G)
Result=ImageChops.darker(Result,B)

WhiteArea=Result.histogram()[0]
TotalArea=Im.size[0] * Im.size[1]
PercentageWhite = (WhiteArea * 100.0)/TotalArea





Poppy wrote:
> I've put together some code to demonstrate what my goal is though looping 
> pixel by pixel it's rather slow.
> 
> import Image
> 
> def check_whitespace():
>     im = Image.open("\\\\server\\vol\\temp\\image.jpg")
> 
>     size = im.size
> 
>     i = 0
>     whitePixCount = 0
>     while i in range(size[1]):
>         j = 0
>         while j in range(size[0]):
>             p1 = im.getpixel((j,i))
>             if p1 == (255, 255, 255):
>                 whitePixCount = whitePixCount + 1
>                 if whitePixCount >= 492804:  ## ((image dimensions 1404 x 
> 1404) / 4) 25%
>                     return "image no good"
>             j = j + 1
>         i = i + 1
> 
>     print whitePixCount
> 
>     return "image is good"
> 
> print check_whitespace()
> 
> 
> "Poppy" <znfmail-pythonlang at yahoo.com> wrote in message news:...
>> I need to write a program to examine images (JPG) and determine how much 
>> area is whitespace. We need to throw a returned image out if too much of it 
>> is whitespace from the dataset we're working with. I've been examining the 
>> Python Image Library and can not determine if it offers the needed 
>> functionality. Does anyone have suggestions of other image libraries I 
>> should be looking at it, or if PIL can do what I need?
>>
> 
> 


From arnlen at mac.com  Thu May  1 08:15:00 2008
From: arnlen at mac.com (Jumping Arne)
Date: Thu, 1 May 2008 14:15:00 +0200
Subject: Photo gallery software
Message-ID: <0001HW.C43F80E40094984AB01AD9AF@news.individual.de>

I've searching for some software that would allow me to present my photos on 
the web (I'm not interested a software that generates static pages that I 
upload) and there are quite a few, see for example 
<http://en.wikipedia.org/wiki/Comparison_of_photo_gallery_software>, but I 
haven't managed to find one that I like - Gallery 2 is close.

So I've started to see if there is one that is based python (PHP isn't really 
"my language") but when I search on Google almost the only thing I find are 
photo galleries of snakes (to be honest I didn't know that people were *that* 
interested in pythons).

Do any anyone know if there exists photo gallery software written in Python?

I've found
<http://www.amk.ca/python/code/gallery>
<http://www.developer.com/lang/other/article.php/3734416>



From __peter__ at web.de  Tue May 20 02:40:06 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 May 2008 08:40:06 +0200
Subject: Using StringVars in List of Dictionaries as tkInter variables for
	Scale and Label widgets
References: <e7613afe-ba7a-4b4b-9861-2dd42e3a033d@a9g2000prl.googlegroups.com>
	<g0sfs7$cnu$00$1@news.t-online.com>
	<12f77d06-3311-4986-8d77-489dfe8172db@w8g2000prd.googlegroups.com>
Message-ID: <g0tro7$crq$03$1@news.t-online.com>

seanacais wrote:

> I had the Tkinter import as
> 
> from Tkinter import * but I changed it to
> 
> import Tkinter as tk
> 
> and modified the creation of the root object to
> 
> root=tk.Tk()
> 
> I then had to change every instance of Menu, Label,
> Button, and all Tkinter elements to be prefaced by
> tk.  (so Button became tk.Button).  That kind of makes
> sense to me.
> 
> However even after specifying StringVar is a tk type

You misunderstood. There is no such thing as a "tk type". 
Whether you use 

from Tkinter import * 

or

import Tkinter as tk

is irrelevant for the problem at hand.
 
> def initOPValues(self, OPname, dname):
> 
> OPDefaults = {
> 'Vval'  : 0,
> 'Ival'  : 0,
> 'Otemp' : 0
> }
> 
> dname = dict((d,tk.StringVar()) for d in OPDefaults)
> for d in OPDefaults:
> dname[d].set(OPDefaults[d])
> 
> 
> I still get a very similar error message

You have to ensure that the lines

from Tkinter import *
root = Tk()

are *executed* before the line

dname = dict((d, StringVar()) for d in OPDefaults)

While I prefer the alternative 

import Tkinter as tk
root = tk.Tk()
# ...
dname = dict((d, tk.StringVar()) for d in OPDefaults)

this is just a matter of style.

Peter

PS: If you still can't fix your script, please post it completely or,
better, a small self-contained (runnable) script showing the same problem


From castironpi at gmail.com  Fri May 16 09:30:18 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 06:30:18 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
Message-ID: <46f3de71-0152-4926-9e09-9b4046755fb4@k13g2000hse.googlegroups.com>

On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
>
>
>
>
> 42.desthuilli... at websiteburo.invalid> wrote:
> > Kay Schluehr a ?crit :
>
> > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > >> Hello all,
>
> > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > >> It appeared to be the following:
>
> > >> class A(object):
> > >> ? ? pass
>
> > >> print min(1.0, A())
>
> > >> which is accepted by Python even though the A() object is not numerical in
> > >> nature.
>
> > >> The cause of this behavior seems to be the compare operation of the object
> > >> class.
>
> > >> Is there a way to disable this behavior in Python (other than deriving a new
> > >> 'object-like' class that doesn't do comparisons?)
>
> > > Are you sure you don't want to use a statically typed language that
> > > captures all type errors just by inspecting your source code?
>
> > This is not necessarily a static vs dynamic typing problem. The
> > following code will raise a TypeError for very good reasons:
>
> > ? ? print 1.0 + A()- Hide quoted text -
>
> > - Show quoted text -
>
> I question the real-world examples of coercion, casting, and
> upcasting. ?C insists that defining by operator, which may or may not
> relate to system, is the only legal move. ?I doubt operator+ is well-
> defined on non-ideal structures. ?Rationals are not floats, but system
> got checked. ?Define concurrency.- Hide quoted text -
>
> - Show quoted text -

The computer will have to learn knowledge at a distributed real-time
rate.


From kw at codebykevin.com  Sat May 10 12:02:11 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 12:02:11 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.905.1210434531.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>	<a77f3ffd-eea0-487c-ad41-1dbfac83b667@f24g2000prh.googlegroups.com>	<mailman.902.1210433160.12834.python-list@python.org>	<4825C265.90106@codebykevin.com>
	<mailman.905.1210434531.12834.python-list@python.org>
Message-ID: <4825C703.8070206@codebykevin.com>

Guilherme Polo wrote:

> Thanks ;)
> And, yes Kevin, I'm planning to submit it for inclusion into Tkinter's core.

Excellent. I hope your effort is successful.
>
> Thanks for support it, and sorry for saying yours was incomplete.
> I wasn't trying to sell my version by doing that, was just trying to
> say there were some point on doing another wrapper. I also noticed
> that there is some problem in getting Martin Franklin to fill the
> contributors agreement, that was the second point on doing this
> wrapper.

No offense taken. Martin is pretty busy these days and doesn't have time 
to work on it further; frankly, I'm not sure I'd have time if a lot of 
changes were requested. So if your package proves to be the best, great! 
I'll switch over my own apps to it.

Good luck!

Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From kirk at daycos.com  Fri May 30 13:19:56 2008
From: kirk at daycos.com (Kirk Strauser)
Date: Fri, 30 May 2008 12:19:56 -0500
Subject: Calling instance methods from a decorator
Message-ID: <87d4n3n1z7.fsf@internal.daycos.com>

I'm trying to write a decorator that would do something like:

def trace(before, after):
    def middle(func):
        def inner(*args, **kwargs):
            func.im_self.debugfunction(before)
            result = func(*args, **kwargs)
            func.im_self.debugfunction(after)
            return result
        return inner
   return middle

class Foo(object):
    def __init__(self, myname):
        self.name = myname

    def debugfunction(self, message):
        print 'Instance %s says: %s' % (self.name, message)

    @trace('calling', 'finished')
    def bar(self, arg):
        print arg

>>> Foo('snake').bar(123)
Instance snake says: calling
123
Instance snake says: finished

The gotcha seems to be that there's no way to get to 'self' from within the
"inner" function, since func will only have the "normal" attributes:

>>> print dir(func)
['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name']

There's no nice im_self to bounce off of or anything.  I seem to be going
about this all wrong.  What's a good approach to get the desired effect?
-- 
Kirk Strauser
The Day Companies


From george.sakkis at gmail.com  Fri May  2 15:46:56 2008
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 2 May 2008 12:46:56 -0700 (PDT)
Subject: Do you know of a much simpler way of writing a program that 
	writes a program?
References: <mailman.455.1209736660.12834.python-list@python.org> 
	<481B27D9.3000107@behnel.de>
Message-ID: <eb723bdf-a6bb-4258-ad9d-97d3d27a2afc@s50g2000hsb.googlegroups.com>

On May 2, 10:40 am, Stefan Behnel <stefan... at behnel.de> wrote:
> mcse jung wrote:
> > Here is asample program that writes a program and then executes it.
> > Do you knowof a much simpler way of writing a program that writes a program?
>
> I'm not quite sure what you are trying to achieve here, but I bet there is a
> simpler way to do it than by generating a script. You might want to look into
> functions.
>
> http://docs.python.org/tut/node6.html#SECTION006600000000000000000

Seriously, this looks like a DailyWTF entry.

George


From znfmail-pythonlang at yahoo.com  Fri May 30 10:17:39 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Fri, 30 May 2008 10:17:39 -0400
Subject: convert string containing list to list (or tuple) type
References: <g1p15p$4jo$1@aioe.org>
Message-ID: <g1p2a7$8nc$1@aioe.org>

Arrgh. One of those days where I find an answer just after posting. I spend 
hours on the code below only to find I don't know how to use split to it's 
fullest.

>>> b.strip(",").split(",")
['I', 'G', 'AQ', 'ET', 'K', 'BF']

"Poppy" <znfmail-pythonlang at yahoo.com> wrote in message 
news:g1p15p$4jo$1 at aioe.org...
> I'm reading from a database a column that has a list of codes (comma 
> seperated). When I read in the list I have a single value, see code sample 
> below values for a, b, and c. These represent possible values in my 
> database. I need to loop through each value so I can expand my data from 
> this compressed view.
>
> My code below works and creates my desired output but I believe there must 
> be a better way this is very messy. My messy function that I'd like to 
> replace is lst_codes(codes). Any alternative suggestions?
>
> this is what I begin with
> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
> this is what I want (lists or tuples are fine)
> ['P']
> ['I', 'G', 'AQ', 'ET', 'K', 'BF']
> ['DZ']
>
>
> def lst_codes(codes):
>    """ turn a string of comma seperated codes into a real list object """
>    i = 0
>    lstD = []
>    while i < len(codes):
>        a = codes[i]
>        b = ","
>        if (i + 1) < len(codes):
>            b = codes[i + 1]
>            i = i + 1
>        else:
>            b = ","
>
>        if b <> ",":
>            lstD.append(a + b)
>            i = i + 2
>        else:
>            lstD.append(a)
>            i = i + 1
>    return lstD
>
>
> a = ',P,'
> b = ',I,G,AQ,ET,K,BF,'
> c = ',DZ,'
>
> for ea in (a,b,c):
>    print lst_codes(ea.strip(","))
>
> 




From cocobear.cn at gmail.com  Sat May  3 07:17:36 2008
From: cocobear.cn at gmail.com (cocobear)
Date: Sat, 3 May 2008 04:17:36 -0700 (PDT)
Subject: about bsddb module
Message-ID: <e81dc830-b8bd-46bd-ad00-cddf501cf2c2@s33g2000pri.googlegroups.com>

How to deal with multiple databases in an file. I want to get the
content of several databases.

it's the code I wrote:

[cocobear at cocobear ~]$ python
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import bsddb
>>> import os
>>> import time
>>>
>>> db_file = 'native.db'
>>> db = bsddb.db.DB()
>>> db.open(db_file,bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>>> dbs = db.keys()
>>> db.open(db_file,dbs[0],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)
>>> db.keys()
['\x01\x00\x00\x00', '\x02\x00\x00\x00', '\x03\x00\x00\x00',
'\x04\x00\x00\x00', '\x05\x00\x00\x00']
>>> db.open(db_file,dbs[1],bsddb.db.DB_UNKNOWN,bsddb.db.DB_RDONLY)


the program stop here.


From miller.paul.w at gmail.com  Sun May 25 20:08:39 2008
From: miller.paul.w at gmail.com (miller.paul.w at gmail.com)
Date: Sun, 25 May 2008 17:08:39 -0700 (PDT)
Subject: which datastructure for fast sorted insert?
References: <ddc93a25-fb72-40c4-9c5d-44b787237091@l64g2000hse.googlegroups.com>
Message-ID: <4fe8c6cf-9f29-48ab-861b-356f748ffa43@x35g2000hsb.googlegroups.com>

On May 25, 2:37?am, notnorweg... at yahoo.se wrote:
> im writing a webcrawler.
> after visiting a new site i want to store it in alphabetical order.
>
> so obv i want fast insert. i want to delete duplicates too.
>
> which datastructure is best for this?

I think you ought to re-examine your requirements.  Why do you need to
store in alphabetical order?  (And, what does that even mean for a web
site?)  Personally, I'd probably just use a simple dict for in-memory
storage, and use a database for external storage.  In that case,
adding a site or page to the "seen" structure is a simple matter of
doing

urls[key] = url

Dicts are basically hash tables, so this insert is amortized O(1) and
you get dupe-detection for free, provided the key is unique.  If you
want to display the contents in alphabetical order by "key," you can
do this by:

keyz = sorted (urls.keys())
for key in keyz:
    print urls[key]

The problem with this is that you pay the sorting cost every time you
want to display the results.  If that is a problem, you can maintain
an in-memory index (and rely on the database to do it for you in the
case of externally stored results).


From darcy at druid.net  Thu May  8 08:33:23 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Thu, 8 May 2008 08:33:23 -0400
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <4822E485.4040107@aim.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
	<1ab5792a-6dab-4b80-a404-9c197469716e@v26g2000prm.googlegroups.com>
	<4822E485.4040107@aim.com>
Message-ID: <20080508083323.06a74930.darcy@druid.net>

On Thu, 08 May 2008 07:31:17 -0400
Brian Vanderburg II <BrianVanderburg2 at aim.com> wrote:
> This is sort of related, but I'm wondering what is different between 
> "#!/usr/bin/env python" and "#!python".  Wouldn't the second do the same 
> thing, since an absolute path is not specified, find 'python' from the 
> PATH environment,  I don't really know.

Well, I know what happened when I tried it.  What happened when you
tried it?

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From hdante at gmail.com  Thu May 22 01:33:24 2008
From: hdante at gmail.com (Henrique Dante de Almeida)
Date: Wed, 21 May 2008 22:33:24 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<0a9620e9-40f4-4d11-9ddf-9e0f424547b3@x35g2000hsb.googlegroups.com> 
	<d93a0228-0600-45a9-af13-a5ff3aba75ee@e53g2000hsa.googlegroups.com> 
	<8fc0d94d-19bd-483a-8a57-8c03e47d2035@m45g2000hsb.googlegroups.com>
Message-ID: <ad9b8dc0-b8ee-495a-b31a-abb43a88e1b0@k37g2000hsf.googlegroups.com>

On May 22, 1:41?am, Henrique Dante de Almeida <hda... at gmail.com>
wrote:
>
> > > ?Notice that 1e16-1 doesn't exist in IEEE double precision:
> > > ?1e16-2 == 0x1.1c37937e07fffp+53
> > > ?1e16 == 0x1.1c37937e08p+53
>
> > > ?(that is, the hex representation ends with "7fff", then goes to
> > > "8000").
>
> > > ?So, it's just rounding. It could go up, to 1e16, or down, to 1e16-2.
> > > This is not a bug, it's a feature.
>
> > ?I didn't answer your question. :-/
>
> > ?Adding a small number to 1e16-2 should be rounded to nearest (1e16-2)
> > by default. So that's strange.
>
> > ?The following code compiled with gcc 4.2 (without optimization) gives
> > the same result:
>
> > #include <stdio.h>
>
> > int main (void)
> > {
> > ? ? ? ? double a;
>
> > ? ? ? ? while(1) {
> > ? ? ? ? ? ? ? ? scanf("%lg", &a);
> > ? ? ? ? ? ? ? ? printf("%a\n", a);
> > ? ? ? ? ? ? ? ? printf("%a\n", a + 0.999);
> > ? ? ? ? ? ? ? ? printf("%a\n", a + 0.9999);
> > ? ? ? ? }
>
> > }
>
> ?However, compiling it with "-mfpmath=sse -msse2" it works. (it
> doesn't work with -msse either).

 Finally (and the answer is obvious). 387 breaks the standards and
doesn't use IEEE double precision when requested to do so.

 It reads the 64-bit double and converts it to a 80-bit long double.
In this case, 1e16-2 + 0.9999 == 1e16-1. When requested by the printf
call, this 80-bit number (1e16-1) is converted to a double, which
happens to be 1e16.


From timj at tolisgroup.com  Mon May  5 16:47:39 2008
From: timj at tolisgroup.com (brucoder)
Date: Mon, 5 May 2008 13:47:39 -0700 (PDT)
Subject: Visual Studio 6 compile of 2.5.2 fails with missing db.h
References: <1f1a09ff-5800-4ecb-ac9f-f2604454edfb@q1g2000prf.googlegroups.com>
	<mailman.614.1210016810.12834.python-list@python.org>
Message-ID: <2aead6d7-9048-42e7-b1ca-9f8f9110e258@b9g2000prh.googlegroups.com>

On May 5, 1:46?pm, Christian Heimes <li... at cheimes.de> wrote:
> brucoder schrieb:
>
> > Any pointers? ?A prerequisite that I might be missing? ?The source is
> > the Python-2.5.2.tar.gz from the Python.org site.
>
> The tar.gz doesn't contain the dependencies like the bsddb files or
> sqlite3, bzip2 and more. You have to download and unpack the correct
> versions into the correct folder. Please read PCbuild/readme.txt

I had read that, but I misunderstood that not all components must be
built.  Since I don't need that functionality, I now see that I can
simply exclude it from my lib and exe builds.

Thanks,
Tim


From bj_666 at gmx.net  Sun May 11 04:46:07 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 May 2008 08:46:07 GMT
Subject: Some error messages in Python are ugly
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <68nq2fF2si386U1@mid.uni-berlin.de>

On Sun, 11 May 2008 01:10:19 -0700, wxPythoner wrote:

> This really looks ugly for an error message:
> 
> [1]+  Stopped                 python

It's neither an error message nor does it come from Python.  It's a
message from your shell about job control.  Seems you have stopped the
running process, which happens to be Python, by pressing <ctrl>+<z> or
<ctrl>-<y> for example.

> Please explain to me the role of the '+' sign.

Refer to the manual of your shell.  I guess it says, that the stopped
process was/is the current job, i.e. the one commands like ``fg`` or
``bg`` operate on if you leave out the argument.

Ciao,
	Marc 'BlackJack' Rintsch


From mnikhil at gmail.com  Wed May 14 14:54:20 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 15 May 2008 00:24:20 +0530
Subject: readlines with line number support?
References: <g0farj$70d$1@registered.motzarella.org>
	<m2wslwafnd.fsf@googlemail.com>
Message-ID: <g0fcgs$g59$3@registered.motzarella.org>

Arnaud Delobelle wrote:

> The standard Python way is using enumerate()
> 
> for i, line in enumerate(fp):
>     print "line number: " + lineno + ": " + line.rstrip()
> 

I guess you meant to say :

  for lineno, line in enumerate(fp):
      print "line number: " + lineno + ": " + line.rstrip()

Thanks.


From sjdevnull at yahoo.com  Tue May 20 14:19:27 2008
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: Tue, 20 May 2008 11:19:27 -0700 (PDT)
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<puj434tfqimv4dh9qmpcl0cctfqu04lmsv@4ax.com>
Message-ID: <94ce5e02-0185-4513-9bc1-7ec483be57aa@y21g2000hsf.googlegroups.com>

On May 20, 12:14 am, Tim Roberts <t... at probo.com> wrote:
> Monica Leko <monica.l... at gmail.com> wrote:
>
> >I have a specific format and I need binary representation.  Does
> >Python have some built-in function which will, for instance, represent
> >number 15 in exactly 10 bits?
>
> For the record, I'd like to point out that even C cannot do this.  You need
> to use shifting and masking to produce a stream of 8-bit bytes, or to
> extract your values from a stream of 8-bit bytes.

Technically specifying 8-bits isn't quite accurate, as C allows for 9-
bit bytes and other variations depending on the architecture.  But
that may be overly pedantic unless you have a PDP-10 laying around
that you're writing C code on or something like that.


From pataphor at gmail.com  Sun May 18 12:18:34 2008
From: pataphor at gmail.com (pataphor)
Date: Sun, 18 May 2008 18:18:34 +0200
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
	<hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>
	<MPG.2299f0055cfb7860989685@nntp.aioe.org>
	<dtb03495i4isn8oi89i8fpe7p8dif7cct6@4ax.com>
Message-ID: <MPG.229a753256adf097989687@nntp.aioe.org>

In article <dtb03495i4isn8oi89i8fpe7p8dif7cct6 at 4ax.com>, 
dullrich at sprynet.com says...

> Is there some reason that would be better? It would make a lot
> of the code more complicated. Ok, it would require only one
> bit of added code, I suppose, but I don't see the plus side.

The plus side is you give up an untenable position :-) And to address an 
item in a matrix costs two lookups, row and column, while an array needs 
only one. 

P.


From gnewsg at gmail.com  Fri May  2 15:30:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Fri, 2 May 2008 12:30:03 -0700 (PDT)
Subject: portable /dev/null
References: <1jkwzhktzddwv.xxl22p30ivrs.dlg@40tude.net>
Message-ID: <1cdf54b3-ceda-4e06-8be1-9abaa20d9921@w74g2000hsh.googlegroups.com>

On 2 Mag, 21:20, Brendan Miller <catph... at catphive.net> wrote:
> Hi,
>
> I have functions that take a file object and write to it. In some cases I
> just want to throw out what is written to that file object. I want
> something like open('/dev/null', 'w'), but portable.
>
> It needs to have an underlying file descriptor/file handle, as it will be
> passed to non python code.
>
> Is there a portable /dev/null somewhere in the standard library?
>
> Thanks,
> Brendan

I don't think so. You could define a dummy class emulating the file-
object API. Something like:

class NullDevice:
    "A writeable object that writes to nowhere -- like /dev/null."
    def write(self, s):
        pass

    closed = False
    def close(self):
        self.closed = True


--- Giampaolo
http://code.google.com/p/pyftpdlib


From tarun.kap at gmail.com  Mon May  5 18:39:18 2008
From: tarun.kap at gmail.com (TkNeo)
Date: Mon, 5 May 2008 15:39:18 -0700 (PDT)
Subject: SSL through python. possible ?
References: <mailman.613.1210015987.12834.python-list@python.org>
Message-ID: <18f86ec1-8190-4f58-8895-5c0bdd1aa429@l42g2000hsc.googlegroups.com>

On May 5, 2:32 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 5 May 2008 11:11:19 -0700 (PDT),TkNeo<tarun.... at gmail.com> wrote:
> >On May 2, 1:52 pm, Mike Driscoll <kyoso... at gmail.com> wrote:
> >> On May 2, 1:20 pm, Heikki Toivonen <hei... at osafoundation.org> wrote:
>
> >> > Mike Driscoll wrote:
> >> > > On Apr 29, 8:56 am,TkNeo<tarun.... at gmail.com> wrote:
> >> > >> I need to do SSL file transfer using python? Is there a library i can
> >> > >> use ?
>
> >> > >http://sandbox.rulemaker.net/ngps/m2/
>
> >> > M2Crypto has since moved tohttp://chandlerproject.org/Projects/MeTooCrypto
>
> >> > --
> >> >   Heikki Toivonen
>
> >> Whoops...I just went with the first link Google gave me. The link I
> >> gave doesn't mention that the project has moved. Looks like the one
> >> you link to is the 9th link on my Google search using the terms:
> >> "python m2crypto".
>
> >> Sorry if I spread misinformation though.
>
> >> Mike
>
> >ok i have tried around a lot but no luck. I think M2Crypto is my best
> >option except it requires a minimum of python 2.4 which i don't have.
>
> >What i am trying to do is to do an FTP transfer that uses SSL
> >(username, password authentication) and not a certificate file. The
> >few example i have found of the Openssl module use a certificate for
> >authentication unlike what i want to do.
>
> >Anyone has any ideas ?
>
> FWIW, though not as complete as an OpenSSL wrapper as M2Crypto, pyOpenSSL
> works with Python 2.3.
>
> As far as the details of the authentication that you are attempting go, it
> sounds like you want to use ephemeral DH key exchange.  This is something
> which is on my list to figure out. ;)
>
> Jean-Paul

Jean, from my limited knowledge, there are usually 3 modes of
authentication:
1. certificate exchange
2. key exchange
3. username/password

#3 is what i want to use.



From beema.shafreen at gmail.com  Wed May 21 05:23:51 2008
From: beema.shafreen at gmail.com (Beema shafreen)
Date: Wed, 21 May 2008 14:53:51 +0530
Subject: Typeerror
In-Reply-To: <9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>
References: <aa405c1f0805210140n354bd0a6r5781b147847668b1@mail.gmail.com>
	<mailman.1414.1211360353.12834.python-list@python.org>
	<9dee15ca-1b7c-4884-b3dd-189c84688e07@2g2000hsn.googlegroups.com>
Message-ID: <aa405c1f0805210223v4c4fbd03x563db0c0d4c5a457@mail.gmail.com>

Thanks a lot i had solved the problem

On Wed, May 21, 2008 at 2:32 PM, <jonbutler88 at googlemail.com> wrote:

> On May 21, 9:58 am, Freaky Chris <angry-ch... at hotmail.com> wrote:
> > This is a simple error, you are passing the variable res as an interger
> to
> > use for a slice when what ever you are storing in res isn't an integer.
> >
> > Chris
> >
> >
> >
> > Beema shafreen wrote:
> >
> > > Hi all,
> > > I getting the following error when i run my scirpt ,
> > > can somebody help me regarding this to solve the type error problem
> >
> > > Traceback (most recent call last):
> > >   File "get_one_prt_pep.py", line 59, in ?
> > >     if len(data[res])<=1:
> > > TypeError: string indices must be integers
> >
> > > --
> > > Beema Shafreen
> >
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
> >
> > --
> > View this message in context:
> http://www.nabble.com/Typeerror-tp17358659p17358932.html
> > Sent from the Python - python-list mailing list archive at Nabble.com.
>
> If it is an integer, but stored as a string you can use:
>
> if len(data[int(res)])<=1
>
> its not pretty but it should sort out the type errors
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Beema Shafreen
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From kamhung.soh at gmail.com  Tue May 27 01:59:48 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Tue, 27 May 2008 15:59:48 +1000
Subject: Hungarian Notation
In-Reply-To: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
References: <WYM_j.17753$hv2.15886@bignews5.bellsouth.net>
Message-ID: <g1g80l$65r$1@ger.gmane.org>

inhahe wrote:
> Does anybody know of a list for canonical prefixes to use for hungarian 
> notation in Python?  Not that I plan to name all my variables with hungarian 
> notation, but just for when it's appropriate.

I used simple Hungarian notation when I started programming in Python 
(e.g. "s" for strings, "l" for lists, "d" for dictionaries).  As my 
programming style became more "Pythonic" and I chose better variable 
names, I stopped using Hungarian notation.

YMMV.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From kd015b3257 at blueyonder.co.uk  Fri May  9 14:34:10 2008
From: kd015b3257 at blueyonder.co.uk (kdwyer)
Date: Fri, 09 May 2008 19:34:10 +0100
Subject: PyXml
Message-ID: <g026cv$6s5$1@ger.gmane.org>

Hello Everyone,

I've been looking into writing a utility to compare/analyse xml files, and
thought I'd have a look at PyXml, but the Sourceforge page says it's no
longer maintained.

Two questions:
What's the story with PyXml?  Is it stable/complete or has effort moved
elsewhere?

Can anyone recommend a Python validating parser that validates vs Xml
Schema?

Many thanks,

Kev



From tjreedy at udel.edu  Tue May 13 17:42:50 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 13 May 2008 17:42:50 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F37@percello-sbs.percello.local>
Message-ID: <g0d20n$om3$1@ger.gmane.org>


"Ohad Frand" <ohad.frand at percello.com> wrote in message 
news:B9E129828E47994B9B95E1BAABC8868C0B8F37 at percello-sbs.percello.local...
| Hi
| Thanks a lot for your reply
| I think the main uses for it is to study the language and to see that I
| didn't miss anything else or that something is changed from one version
| to another.

The language manual lists and explains all the keywords.
The library manual lists and explains all the builtin functions, classes, 
and other objects and, by now, everying in the standard library. 
Experimenting with code while reading is definitely a good idea too.





From amit.uttam at gmail.com  Wed May 21 18:59:39 2008
From: amit.uttam at gmail.com (amit.uttam at gmail.com)
Date: Wed, 21 May 2008 15:59:39 -0700 (PDT)
Subject: Separate output for log file and stdout
References: <54a53d7f-b137-49cc-8ea4-cc0b184384f0@k1g2000prb.googlegroups.com>
	<878wy9soce.fsf@benfinney.id.au>
	<60a036c9-aa6b-4751-b956-8bb8b04459f1@c19g2000prf.googlegroups.com>
	<mailman.1366.1211238396.12834.python-list@python.org>
Message-ID: <4751db1b-9e09-4c70-9372-5ac96d7437aa@u12g2000prd.googlegroups.com>

On May 19, 4:05 pm, "Kam-Hung Soh" <kamhung.... at gmail.com> wrote:
> On Tue, 20 May 2008 06:58:28 +1000, <amit.ut... at gmail.com> wrote:
> > On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> >> amit.ut... at gmail.com writes:
> >> > I've recently jumped big time into python and I'm working on a
> >> > software program for testing automation.
>
> >> Welcome, to both fields :-)
>
> > Thanks! I am having a great time learning and coding in python. It's
> > an amazing programming language.
>
> >> > I had a question about proper logging of output. What I would like
> >> > is:
>
> >> >  1. a function syslog (to log output to log file only)
> >> >  2. a function stdout (to log output to stdout only)
> >> >  3. a function sslog (to log output to both log and stdout)
>
> >> > Right now I am using StandOut module
>
> >> Have you investigated the 'logging' module in the Python standard
> >> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
> >> to meet your listed requirements, without need of external
> >> dependencies.
>
> > Hmm..Yeah I didn't realize python had its own standard logging
> > facility. I took a look at it and it seems to do the job. However, the
> > output seems to be syslog style output. In the program I am writing,
> > the log file stores all the output of the commands being run (e.g. tcl
> > scripts, etc). Will this be possible using the built in python logging
> > module?
>
> > Thanks,
> > Amit
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> You can define the format of the log output in basicConfig(), for example:
>
>  from logging import basicConfig, error, info, INFO
> ...
>    basicConfig(
>        datefmt='%Y%m%d_T%H%M%S',
>        filemode='a',
>        filename=LOG_PATH,
>        format='%(asctime)s,%(levelname)s,%(message)s',
>        level=INFO
>    )
>
> If you want to log the output of other commands in your log file, you can
> connect a pipe to that command.  Maybe look at "subprocess -- Subprocess
> management" inhttp://docs.python.org/lib/module-subprocess.html
>
> --
> Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>

Thanks for the reply.

Yeah I am using the subprocess module and I am able to capture the
output and save it to log a file. However, looking at module-logging
the output format is like syslog. What I want is my own custom log
file format. I wrote a separate module containing all the functions
for the logging but I can't seem to use it globally. How does one use
global variables in python?

Code:

# log.py - A base class that provides logging functionality.
#
# Copyright 2008 Amit Uttamchandani <auttamchandani at canoga.com>
#

import os
import sys

logfile = None
global logfile

def createLogFile(filename):
    '''Opens a file for logging.'''
    try:
        logfile = open(filename, 'w')
    except IOError:
        print 'Error: Cannot create log file: %s' %
os.abspath(logfile)
        sys.exit(0)

def stdlog(logstr):
    '''Writes output to stdout.'''
    sys.stdout.write(logstr)

def syslog(logstr):
    '''Writes output to logfile.'''
    logfile.write(logstr)

def agglog(logstr):
    '''Aggregate output of logstr.'''
    syslog(logstr)
    stdlog(logstr)

def closeLogFile():
    '''Closes the log file.'''
    logfile.close()


Thanks,
Amit


From clajo04 at mac.com  Thu May 29 14:45:53 2008
From: clajo04 at mac.com (John Clark)
Date: Thu, 29 May 2008 14:45:53 -0400
Subject: NYC Python User Group Meeting Announcement....
Message-ID: <00b601c8c1bc$3a6a0c20$af3e2460$@com>

Greetings!

The next New York City Python Users Group meeting is planned for June 17th, 
6:30pm at Daylife Inc. at 444 Broadway (between Howard St. and Grand St.) on
the 5th Floor. We welcome all those in the NYC area who are interested in 
Python to attend.

More information can be found on the users group wiki page:

http://www.nycpython.org

Hope to see you there!

-John Clark




From skanemupp at yahoo.se  Thu May 15 09:07:06 2008
From: skanemupp at yahoo.se (globalrev)
Date: Thu, 15 May 2008 06:07:06 -0700 (PDT)
Subject: datamining .txt-files, library?
References: <8ab6802f-ac2c-4492-b793-704126567a8e@a1g2000hsb.googlegroups.com>
	<55de611d-e484-4373-a485-35925a68919c@8g2000hse.googlegroups.com>
Message-ID: <e17e3743-597a-4ff3-b6ac-9ca2949488df@m36g2000hse.googlegroups.com>

On 15 Maj, 14:40, George Sakkis <george.sak... at gmail.com> wrote:
> On May 15, 8:27 am, globalrev <skanem... at yahoo.se> wrote:
>
> > i have a big collection of .txt files that i want to open and parse to
> > extract information.
>
> > is there a library for this or maybe even built in?
>
> This has a lot to do with how well-structured are your files and what
> kind of information you hope to extract (shallow or deep). NLTK might
> be a good starting point:http://nltk.sourceforge.net/
>
> George

superstructured, 10K+files, all look the same.


From emailamit at gmail.com  Fri May 23 20:33:09 2008
From: emailamit at gmail.com (Amit Gupta)
Date: Fri, 23 May 2008 17:33:09 -0700 (PDT)
Subject: would this be called bug?
Message-ID: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>

The code is attached below. Basically I am taking a substring of
variable m, and using "buffer" instead of slicing.

However, the application of int on that buffer start correctly from
the offset, but it scans all the way to the end, instead of stopping
at the length of the buffer.

It works however, if I apply str function to output of buffer
function.

-A


(Pdb) m = "AA1234AA"
(Pdb) x = buffer(m, 2, 4)
(Pdb) x
<read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
(Pdb) int(x)
*** ValueError: invalid literal for int() with base 10: '1234AA'
(Pdb) m = "AA1234AA"
(Pdb) m = "AA1234"
(Pdb) x = buffer(m, 2, 4)
(Pdb) int(x)
1234
(Pdb)


From castironpi at gmail.com  Tue May  6 23:46:28 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Tue, 6 May 2008 20:46:28 -0700 (PDT)
Subject: Generate labels for a multi-level outline
References: <mailman.680.1210110208.12834.python-list@python.org>
Message-ID: <d2f566db-d02f-4386-9eaf-ef790341edaa@w7g2000hsa.googlegroups.com>

On May 6, 4:43?pm, pyt... at bdurham.com wrote:
> I need to generate multi-level incrementing labels for an
> outline/hierarchy where the string for each level of a label is based on
> an incrementing sequence like 1, 2, 3 or A, B, C, or even I, II, III.
> For simplicity, assume that each level's label segment is separated by a
> period (".").
>
> I will pass an integer level (1 ... N) to this function/object so that
> level specific counters get reset when the level changes.
>
> I will use this function/object to generate output like:
>
> Label ? ? Level
> I. ? ? ? ?1
> I.A. ? ? ?2
> I.B. ? ? ?2
> I.C. ? ? ?2
> I.D. ? ? ?2
> I.D.1. ? ?3
> I.D.2. ? ?3
> I.D.3. ? ?3
> I.E. ? ? ?2
> II. ? ? ? 1
>
> Is there a pre-built class for generating label sequences like this?
> (I'm not sure what I would use as search terms to google for such a
> class).
>
> While this sounds like a simple/fun class to write, I think it could
> quickly get complicated when one factors in parsing rules for each
> level's label type, separators, and error checking. If there's an
> existing, road tested class (with unit tests) that does this, I would
> rather avoid re-inventing/re-testing the wheel.
>
> Thanks,
> Malcolm

You've inquired about syntax here.

(simulated)

>>> a.next( )
I.
>>> a.throw( in )
I.A.
>>> a.next( )
I.B.
>>> a.next( )
I.C.
>>> a.throw( out )
II.

I will implement the object (the term is  "generator"), but you have
to count on two things: I can, and I'll check the newsgroup (i.e. bank
on the spare time of others).  You're invited to reply with any and
all interest.  Personally, the offer expires, but I'm not the only one
with the skill.  (Stay tuned.)

(The trick to generators is "dis"inventing wheels.)

Is the formulation proposed satisfactory to you?

Would you prefer to yield a sequence of marks, as a further option, as
follows?  (As opposed to the rejoined string.)

(simulated)

>>> a.next( )
( "I", )
>>> a.throw( in )
( "I", "A" )
>>> a.next( )
( "I", "B" )
>>> a.next( )
( "I", "C" )
>>> a.throw( out )
( "II", )

At this point in conception, my proposal has -not- met your criterion
of:

> I will pass an integer level (1 ... N) to this function/object so that
> level specific counters get reset when the level changes.

but does proceed stepwise through my sequence.

(Further I am interested in other means of display of the information
you're presenting in the outline; feel free to brainstorm on this
group.)

Library: Python allows you to join sequences of strings simply:

>>> ".".join( ( "I", "A", "1", "iii" ) )
'I.A.1.iii'

But customization could make the return a multi-liner.  Yes it's free,
what you've asked.

The implementation is subject to taste in one of two ways, whether
you're holding a mutable sequence of generators (per se), or just one,
but for beggars can't be choosers, the free code only comes with one.
If you will want to "go back and insert", generators are the -wrong-
solution (prop check).


From paolovictor at gmail.com  Sat May 24 04:45:59 2008
From: paolovictor at gmail.com (Paolo Victor)
Date: Sat, 24 May 2008 01:45:59 -0700 (PDT)
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<2aa4c986-57d8-41dd-9f18-911625965620@z72g2000hsb.googlegroups.com> 
	<5ccb8e61-ad53-48aa-b6ac-a6034907c36c@a32g2000prf.googlegroups.com> 
	<87lk20telh.fsf@physik.rwth-aachen.de>
Message-ID: <92ba5408-a0ca-4070-83fb-37eabe667603@m73g2000hsh.googlegroups.com>

I love it when a troll tries to make his/hers/its point with a vague,
biased assumption:

"I mean, it's not that slow - wait, I guess it's slower, because I...
I think so! Yeah! It's slow! At least it feels like it..."

It's all about choosing the right tool. If you think Python doesn't
suit your needs, you really should look for something that does,
instead of wasting your (and our) time with "guesses" and "feelings".

Research/develop/execute a benchmark. Gather and analyze relevant
data. Make a real contribution.

Peace,
Paolo

On May 24, 3:12 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
wrote:
> Hall?chen!
>
> cm_gui writes:
> > [...]
>
> > if python is such a good programming/scripting language,
> > why can't they build a faster interpreter/compiler engine?
> > and beat php and zend.
> > to the python team, rebuild your interpreter!
>
> > torontolife.com is slow.
>
> For me, torontolife.com is exactly as fast as Wikipedia.
>
> Tsch?,
> Torsten.
>
> --
> Torsten Bronger, aquisgrana, europa vetus
>                                       Jabber ID: bron... at jabber.org
>                (Seehttp://ime.webhop.orgfor further contact info.)



From deets at nospam.web.de  Tue May 20 09:51:17 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 May 2008 15:51:17 +0200
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>
Message-ID: <69g3bmF31ttuuU3@mid.uni-berlin.de>

bearophileHUGS at lycos.com wrote:

> John Salerno:
>> What does everyone think about this?
> 
> The Example 2 builds a list, that is then thrown away. It's just a
> waste of memory (and time).

No, it doesn't. It uses append because it refers to itself in the
if-expression. So the append(c) is needed - and thus the assignment
possible but essentially useless.

Diez


From efurman at admailinc.com  Tue May  6 12:36:40 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Tue, 06 May 2008 08:36:40 -0800
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
References: <CeuSj.107251$rd2.30692@pd7urf3no>
	<87bq3ozs09.fsf@benfinney.id.au>	<20080502110755.85e2ea4e.darcy@druid.net>	<mailman.494.1209791508.12834.python-list@python.org>	<fvigaa$bdc$1@panix3.panix.com>	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
Message-ID: <48208918.6090807@admailinc.com>

Banibrata Dutta wrote:

>On 5/6/08, andrej.panjkov at climatechange.qld.gov.au
><andrej.panjkov at climatechange.qld.gov.au> wrote:
>  
>
>>At our site we run  IRIX, UNICOS, Solaris, Tru64, Linux, cygwin and
>>other unixy OSes.
>>
>>We have python installed in a number of different places:
>>/bin/python
>>/usr/local/bin/python
>>/usr/bin/python
>>/opt/freeware/Python/Python-2.5.1/bin/python
>>~mataap/platform/python/python-2.5.1
>>
>>So I cannot assume a single location for python.  Nor for any other
>>tool, really.  Bash for example.  It may indeed be in /usr/bin on many
>>systems, on many others it is not.
>>
>>Note the version specific install points.  This allows us to switch
>>over easily to different versions, and keep older versions in case
>>they are needed.  We can test new versions before cutting over to them
>>operationally. (This matters for tools that are still changing, like
>>python or bash.)
>>
>>We use the very handy 'modules' package (not python modules, not
>>fortran modules) to adjust our paths and environment variables as
>>needed.
>>
>>Some of the install points are determined by policy, or historical
>>constraints, or hardware limits, or file system layout.
>>
>>Now it is true that it is easy to edit a single script to change the
>>hashbang line.  It is not easy to change several hundred scripts, on
>>different machines.  It is easy to adjust the environment to point to
>>the right python path, and have all your scripts pick it up
>>automatically.
>>    
>>
>
>Looks reasonable thing to do...
>
>  
>
>>Use /usr/bin/env.  If env is not in /usr/bin, put a link to it there.
>>    
>>
>
>So why not put symlink to Python over there on all machines, if we can
>put one (or env itself) there ?
>
A symlink directly to python (or whatever) would not help when testing 
version x.y.z, while still leaving version a.b.c in place for the other 
tools/scripts/programs to keep using.
--
Ethan
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From bruno.desthuilliers at gmail.com  Wed May 14 16:27:43 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Wed, 14 May 2008 13:27:43 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<192840a00805130957t71cbb00ew73f1e10cfb62edcd@mail.gmail.com> 
	<mailman.1059.1210699996.12834.python-list@python.org>
	<482a190b@news.mel.dft.com.au>
Message-ID: <654f3d7e-ad09-4984-9612-ffa3373eaaba@25g2000hsx.googlegroups.com>

On 14 mai, 00:41, John Machin <sjmac... at lexicon.net> wrote:
(snip)
> IIRC the idea was so that managers could write programs in English. It
> failed because nobody could write a parser that would handle something
> like "The bottom line is that the stakeholder group requires the
> situation going forward to be such as to facilitate the variable known
> as x to provide the same outcome when stimulated by dereferencing as the
> variable known as y".

John, I usually don't agree much with both what you say and how you
say it, but I must admit that this one is, well... just brillant !-)

(IOW: rofl, keyboard, and +1 QOTW)


From pavlovevidence at gmail.com  Sun May  4 02:29:17 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 3 May 2008 23:29:17 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
Message-ID: <8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>

On May 3, 7:44 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Alexander Schmolck wrote:
> > AlFire <spamgrinder.tryla... at ggmail.com> writes:
>
> >>> The threading module already has a function to return the number of Thread
> >>> objects currently alive.
>
> >> I have threads within threads - so it does not suit me :-(.
>
> > How about using a scalar numpy array? They are mutable, so I assume that x +=
> > 1 should be atomic.
>
> No NO NO! The only way to increment a variable in memory is through a
> three step process:

Yes, this will be atomic.  It's a pretty good idea, in fact.  The
underlying increment operation is protected by the GIL; it could be
three, forty, or a hundred steps and it'd be atomic at the Python
level.


Carl Banks


From gagsl-py2 at yahoo.com.ar  Thu May  8 08:31:21 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 May 2008 09:31:21 -0300
Subject: Writing elapsed time as a string
References: <481B67E5.7040507@googlemail.com>
Message-ID: <op.uat42jrux6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 02 May 2008 16:13:41 -0300, Simon Pickles <sipickles at googlemail.com> escribi?:

> I'm sorry if this has been asked a thousand (million) times.
>
> Is there a nifty pythonesque way to produce a string representing an
> elapsed time period, in terms of years, months, days, hours, mins, seconds?
>
> I am storing times in a MySQL db, and would love to be able to write the
> time elapsed between accesses of certain data. These are in seconds
> since the epoch, as produced by time.time()

Two options:

a) You can construct a datetime object with that info, using datetime.datetime.fromtimestamp()
(note that the MySQLdb module already returns datetime objects for timestamp columns in MySQL).
If you substract two datetime objects, you get a timedelta object, which stores info as whole days, seconds (fraction of day) and microseconds (fraction of second). If you can live with years having exactly 365 days and months having exactly 30 days (or up to 35!):

def timedelta_str(td):
     def plural(n):
         if n>1: return 's'
         return ''
     out = []
     y, d = divmod(td.days, 365)
     if y: out.append('%d year' % y + plural(y))
     m, d = divmod(d, 30)
     if m: out.append('%d month' % m + plural(m))
     if d: out.append('%d day' % d + plural(d))
     h, s = divmod(td.seconds, 60*60)
     if h: out.append('%d hour' % h +  + plural(h))
     m, s = divmod(s, 60)
     if m: out.append('%d min' % m + plural(m))
     if s: out.append('%d sec' % s + plural(s))
     return ' '.join(out)

py> from datetime import datetime
py> d1 = datetime(1992, 5, 11, 8, 23, 8, 612)
py> d2 = datetime.now()
py> print d1
1992-05-11 08:23:08.000612
py> print d2
2008-05-08 09:21:53.592000
py> print timedelta_str(d2-d1)
16 years 1 day 58 mins 45 secs

or b) Use the dateutil package <http://labix.org/python-dateutil>

> It is probable right in front of me in the docs but I am spinning off
> into outer space (mentally!)

Nope... showing time intervals as years,months,days... isn't trivial, because there are many special cases, and sometimes legal issues too. It's impossible to make everyone happy in this topic.

-- 
Gabriel Genellina



From hdante at gmail.com  Tue May  6 13:06:28 2008
From: hdante at gmail.com (hdante)
Date: Tue, 6 May 2008 10:06:28 -0700 (PDT)
Subject: Are rank noobs tolerated, here?
References: <QUrTj.22459$2c3.9221@fe097.usenetserver.com>
	<3zITj.35199$gB5.25251@fe105.usenetserver.com>
Message-ID: <995582f9-754f-4f6e-857e-8156ea7b0b20@56g2000hsm.googlegroups.com>

On May 5, 3:43 pm, notbob <not... at nothome.com> wrote:
>
> ----------
>
> "Here is an example of a user-defined function that has a parameter:
>
> def print_twice(bruce):
>     print bruce, bruce
>
>
> ****ME****
> is this just an example of how the def should be written and it doesn't
> really do anthing... yet?  I read another newb explanation here:http://www.codepedia.com

 That's right. Definitions only explain how things work. They are used
later.


> and give the command print myfirstfuntion and I get back this:
> <function myfirstfunction at 0xb7b9c994>

 When you have a problem with your code, always post here the complete
code and a complete execution. For example:

 file myfile.py:
 --------------------------
 def myfirstfunction():
      abcde

 myfirstfunction()
 --------------------------

 execution:
 $ python myfile.py
 Traceback (most recent call last):
   File "myfile.py", line 4, in <module>
     myfirstfunction()
   File "myfile.py", line 2, in myfirstfunction
     print abcde
 NameError: global name 'abcde' is not defined
 ------------------------------------------------

 This way we can find out what's wrong (don't worry about the code
above, it's just an example)

> ok, I try and follow the above, but where is he getting the script?  So, I
> make a script called chap03.py and put it in ~/pyth/chap03/.

 "import" is very complex. For example, in my system, it looks for
files in all these places:

['', '/usr/bin', '/usr/lib/python25.zip', '/usr/lib/python2.5', '/usr/
lib/python2.5/plat-linux2', '/usr/lib/python2.5/lib-tk', '/usr/lib/
python2.5/lib-dynload', '/usr/local/lib/python2.5/site-packages', '/
usr/lib/python2.5/site-packages', '/usr/lib/python2.5/site-packages/
Numeric', '/usr/lib/python2.5/site-packages/PIL', '/usr/lib/python2.5/
site-packages/gst-0.10', '/var/lib/python-support/python2.5', '/usr/
lib/python2.5/site-packages/gtk-2.0', '/var/lib/python-support/
python2.5/gtk-2.0', '/usr/lib/python2.5/site-packages/wx-2.8-gtk2-
unicode', '/var/lib/python-support/python2.5/IPython/Extensions', '/
home/hdante/.ipython']

 Those are directories that it uses to find files. You tell import
just the base name of the script "chap03". Then it adds the ".py"
extension, looks in each directory in order, etc. Notice in the
directory list that the first entry is a blank: ''. It represents the
current directory. So, if you do:

 $ cd ~/pyth/chap03
 $ python
 >>> import chap03

 It will work as expected.

>
> In a function call, the value of the argument is assigned to the
> corresponding parameter in the function definition.  In effect, it is if
> bruce = 'Spam' is executed when print_twice('Spam')
> is called, bruce = 5 in print_twice(5), and
> bruce = 3.14159 in print_twice(3.14159)."
>
> ****ME****
> OK, I'm totally lost.  Neither the above or the other link works or make any
> sense at all.  Is the above print_twice(5), etc, supposed to work like the
> original print_twice(bruce) function (which still doesn't!), just with a

 Words that appear in a program, like, "bruce" are variables.
Variables are stamps. Bruce is a stamp. Here is bruce:

 /----------\
 |  bruce   |
 \----------/

 You can put the stamp in other things:


 /----------\  glued
 |  bruce   | ------> 42
 \----------/

 When you use a stamp, it returns what it's glued on:

 >>> bruce = 42  # glue a stamp
 >>> print bruce # use the stamp
 42

 When you call print_twice(42), first bruce glued to the value 42.
When you use bruce:

 print bruce, bruce

 The value 42 is retrieved and given to the "print" function.

 So, I can glue arbitrary things with bruce:

 >>> print_twice(5)
 5 5

 >>> print_twice(3.14)
 3.14 3.14

 etc.

 If you want to print "bruce bruce", then you need a special kind of
value, called a string:

 >>> print_twice('bruce')
 bruce bruce

 'bruce' is a string (notice the quotes). In this case bruce is glued
to 'bruce':

 /----------\  glued
 |  bruce   | ------> 'bruce'
 \----------/

 When you pass strings to "print", they appear the way they are
written.

 >>> print 'bruce'
 bruce
 >>> print_twice('bruce')
 bruce bruce


> different parameter?  Call me stupid, but I'd sure like to get past this.

 Stupid. Not really. :-) I'd rather say that the problem is the book.
The book is just another introduction to programming. There's no
special attempt to make the reader learn to think like a computer
scientist.

> How am I supposed to get the original def to work?  I've yet to figure out

 file myfile.py:
-------------------------------
def print_twice(bruce):
	print bruce, bruce

print_twice('bruce')
print_twice(2)
-------------------------------

execution:
-------------------------------
$ python myfile.py
bruce bruce
2 2


 Finally, you don't understand something, ask again.


From wojtek.gminick.walczak at gmail.com  Tue May  6 11:11:37 2008
From: wojtek.gminick.walczak at gmail.com (Wojciech Walczak)
Date: Tue, 6 May 2008 17:11:37 +0200
Subject: #!/usr/bin/env python vs. #!/usr/bin/python
In-Reply-To: <874p9belo6.fsf@benfinney.id.au>
References: <CeuSj.107251$rd2.30692@pd7urf3no> <87bq3ozs09.fsf@benfinney.id.au>
	<20080502110755.85e2ea4e.darcy@druid.net>
	<mailman.494.1209791508.12834.python-list@python.org>
	<fvigaa$bdc$1@panix3.panix.com>
	<956b3035-4f82-4391-8d1e-7f88875f8d21@w1g2000prd.googlegroups.com>
	<3de8e1f70805060135h5b5078fpe12fe5348d24a421@mail.gmail.com>
	<mailman.643.1210071367.12834.python-list@python.org>
	<874p9belo6.fsf@benfinney.id.au>
Message-ID: <2c3c21060805060811y11874e76u40fde61f1d927e3a@mail.gmail.com>

2008/5/6, Ben Finney <bignose+hates-spam at benfinney.id.au>:
>  > >  So why not put symlink to Python over there on all machines, if
>  > >  we can put one (or env itself) there ?
> > To avoid linking all the rest of interpreters like perl, ruby, lua
>  > and dozens of others.
> The argument was being made from "thousands of scripts". Isn't "dozens
>  of symlinks" better?

I think that depending on /usr/bin/env is more farsighted and saves some future
headaches. Creating links in /usr/bin/ means, that you have to change them
whenever you update your software (e.g. any of your many interpreters ;-)).
Changing the "#!/usr/bin/python" into "#!/usr/bin/env python" means that you do
your job once, and you can sleep well. It also is more portable.

How was it in perl?
perl -p -i -e 's/#\!\/usr\/bin\/python/#\!\/usr\/bin\/env python/' *.py

Funny thing, I have just ls'ed /usr/bin/python on my system:
$ ls -l /usr/bin/python
lrwxrwxrwx 1 root root 24 2007-11-16 14:02 /usr/bin/python ->
/usr/local/bin/python2.5

:-)

-- 
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/


From alan.wright at volubill.com  Wed May 21 12:34:44 2008
From: alan.wright at volubill.com (Alan Wright)
Date: Wed, 21 May 2008 17:34:44 +0100
Subject: Newbie: Keep TCP socket open
References: <zNydnaZRy8MPAKzVnZ2dnUVZ8uCdnZ2d@pipex.net><e8e610ae-dec8-4551-b769-28ce9254c2b1@c58g2000hsc.googlegroups.com><DK6dnSffU4LRSazVnZ2dnUVZ8qqlnZ2d@pipex.net><mailman.1364.1211234091.12834.python-list@python.org><D5ednQP07vTRma_VnZ2dnUVZ8s7inZ2d@pipex.net>
	<mailman.1367.1211240706.12834.python-list@python.org>
	<iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d@pipex.net>
Message-ID: <0pidnUQqfP260qnVnZ2dnUVZ8t_inZ2d@pipex.net>

You must have something in your IPtables

I needed to put a rule in to drop these unwanted RST from getting back out.

All fixed now

Thanks for the advice

Alan

"Alan Wright" <alan.wright at volubill.com> wrote in message 
news:iaidnRzZuNB9YK7VnZ2dnUVZ8uednZ2d at pipex.net...
> Same on FC8, sends RST after it sees SYN/ACK
>
> "Ghirai" <ghirai at ghirai.com> wrote in message 
> news:mailman.1367.1211240706.12834.python-list at python.org...
>> On Mon, 19 May 2008 23:50:50 +0100
>> "Alan Wright" <alan.wright at volubill.com> wrote:
>>
>>> Ghirai,
>>> Scapy does the same, only it sends RST and not FIN, so still no help
>>>
>>>  send(IP(dst="10.1.1.2")/TCP(dport=50000,flags="S"))
>>>
>>> Only have windows at the moment sadly.
>>>
>>> Alan
>>>
>>
>> Are you sure there's no firewall or something else between you and the
>> remote host?
>>
>> Because i just tried that command with scapy and it didn't send any other 
>> packets
>> except what it was told (1 packet with SYN flag set).
>>
>> I haven't tried on windows though.
>>
>> -- 
>> Regards,
>> Ghirai.
>
> 




From software at ginstrom.com  Sat May 10 21:34:44 2008
From: software at ginstrom.com (Ryan Ginstrom)
Date: Sun, 11 May 2008 10:34:44 +0900
Subject: firefox add-on to grab python code handily?
In-Reply-To: <_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>
References: <93e5303c-d19e-4037-9b39-368df4325c76@c65g2000hsa.googlegroups.com>
	<_JOdneY5ha93ObjVnZ2dnUVZWhednZ2d@comcast.com>
Message-ID: <060201c8b307$31193e20$0203a8c0@MOUSE>

> On Behalf Of Larry Bates
> Since most of us keep Idle or some other Python IDE open 
> nearly 100% of the time we just copy from webpage, paste into 
> new Python document, and run in the IDE. 
> While you could clearly write a plug-in for FF to achieve 
> this, IMHO I doubt many people would actually use it.

Not that I'm going to implement it, but it would be really neat to tie
something together with codepad[1]

[1] http://codepad.org/
(With the site owner's permission, of course!)

Regards,
Ryan Ginstrom



From larry.bates at websafe.com`  Thu May 15 15:00:49 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Thu, 15 May 2008 14:00:49 -0500
Subject: Dbase / foxpro files
In-Reply-To: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <v4CdnTM6fML7FbHVnZ2dnUVZ_hjinZ2d@comcast.com>

Johny wrote:
> Is there a module for reading/modifing db files from Python?
> Thanks for help
> B.

Just create a ODBC DataSource (Control Panel/Administrative Tools/
DataSources) and use ODBC to read/write.

-Larry


From saptarshi.guha at gmail.com  Mon May 19 01:11:33 2008
From: saptarshi.guha at gmail.com (sapsi)
Date: Sun, 18 May 2008 22:11:33 -0700 (PDT)
Subject: Reading Java byte[] data stream over standard input
Message-ID: <59da4e60-f4ac-4fa0-9c86-5e4a0c7cf423@m73g2000hsh.googlegroups.com>

Hello,
I am using HadoopStreaming using a BinaryInputStream. What this
basically does is send a stream of bytes (  the java type is : private
byte[] bytes) to my python program.

I have done a test like this,
while 1:
	x=sys.stdin.read(100)
	if x:
		print x
	else:
		break

Now, the incoming data is binary(though mine is actually merely ascii
text) but the output is not what is expected. I expect for e.g

all/86000/114.310.151.209.60370-121.110.5.176.113\n62485.9718
118.010.241.12 60370 128.210.5.176

However i get a 1 before all and a 4 just after \n and before the 6.

My question is : how do i read binary data(Java's byte stream) from
stdin?
Or is this actually what i'm getting?

Thanks
Sapsi


From vlastimil.brom at gmail.com  Tue May  6 18:07:14 2008
From: vlastimil.brom at gmail.com (Vlastimil Brom)
Date: Wed, 7 May 2008 00:07:14 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
	<18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>
	<9fdb569a0805041407s75c8ad3bsc08c8bac87fa0d83@mail.gmail.com>
	<18c1e6480805041536x7287d23ds9d9bfcf6ec73e123@mail.gmail.com>
	<9fdb569a0805050559q83999d4v6043acb94c9797d0@mail.gmail.com>
	<18c1e6480805060207k5255414ey6dacef759d17966@mail.gmail.com>
Message-ID: <9fdb569a0805061507j70706aa5ie32ddfeb832ccfa7@mail.gmail.com>

Hi David,
thanks for your comments and hints, the proposed approach
with a list of dicts lookup dict is indeed much faster, than my previous
attempts with a database (even without psyco). I used a slightly different
structure with sets of indices, since they should be unique anyway and the
values are later used for the intersection.

This way the lookups (for indices given the tag values) seems to be about 20
times faster than the sqlite query (at least for my limited test case -
there might be some peculiarities with the real data);
however, the (visible) code is quite a bit more complex (for my taste);
(while looking back at
the following line in the inner loop of the lookup function:

tags_lookups[tag][item_dict[tag]] = tags_lookups[tag].get(item_dict[tag],
set()) | set([idx])

I thought, whether I am not overestimating myself with respect to the future
maintaining of the code ... :-)
I assume, that it most likely can
be written in a better way, but I tend to like the simplicity of the
sql version, as its speed is
fully acceptable too.

I will have to recheck these approaches, as soon as I have a more complete
real data available.

Thanks for reminding me about
the mxTextTools; I looked at this package very quickly several months
ago and it seemed quite
complex and heavy-weight, but maybe I will reconsider this after some
investigation ...

The
suggested XML structure is actually almost the one, I use to prepare
and control the input data
before converting it to the one presented in the previous mail :-). The main
problem is, that I can't seem to
make it fully valid XML without deforming the structure of the text
itself - it can't be easily decided,
what CUSTOM_TAG should be in some places - due to the overlapping etc.
Furthermore, the redundancy is actually greater, than it might seem from the
sample given here - there are sometimes more tags - some of them having the
same values for several dozens, sometimes hundreds, subsequent lines.
I also sometimes need to
access portions of texts spanning over multiple "tags", not just
single elements.


Thanks for your time and effort, I'll have the check the alternatives now
and test them a bit further,
  regards,
    Vlasta
-------------- next part --------------
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From spam at altium.nl  Thu May 15 06:26:09 2008
From: spam at altium.nl (Kees Bakker)
Date: Thu, 15 May 2008 12:26:09 +0200
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<48240fe6$0$5108$426a34cc@news.free.fr>
	<53e8ab1c-d786-493b-82df-66055949172a@w4g2000prd.googlegroups.com>
	<mailman.928.1210472625.12834.python-list@python.org>
Message-ID: <3c0c.482c0fc1.3224e@altium.nl>

Gabriel Genellina wrote:

> En Fri, 09 May 2008 10:37:30 -0300, v4vijayakumar <vijayakumar.subburaj at gmail.com> escribi?:
> 
>> On May 9, 1:48 pm, Bruno Desthuilliers <bruno.
>> 42.desthuilli... at websiteburo.invalid> wrote:
>>> v4vijayakumar a ?crit :
>>>
>>> > When I started coding in python, these two things surprised me.
>>>
>>> > 1. my code is inconsistently indented with the combination of tabs and
>>> > spaces. Even lines looked intended, but it is not.
>>>
>>> Then you have a problem with your code editor - not with Python.
>>>
>>
>> Editors can not be wrong. :)
>>
>> I think there should be some way to say python compiler, to consider
>> tab and two blank spaces equal, when tab space = 2.
> 
> It already considers tab = 8 spaces, and when invoked with -tt it rejects mixed tabs+spaces. (I would like Python rejected *any* tab used for indenting...)
> There is a tool 'reindent.py' -somewhere on your Python install-, and an indentation checker 'tabnanny.py' (this one in the standard library).
> 

That's one of the reasons why I like Python :-)

Still too many people don't know that you must set a TAB to 8 in
your editor. Anything other than 8 for a TAB will, at some point,
confuse somebody.

Don't confuse indentation with TAB setting.

Many editors are not helpfull either. Pydev, for example, has a setting
for TAB, but it is used for indentation. It is just luck (I think) that
pydev has an option to say that you only want spaces. (Take a look at
the main preferences of Pydev.)

So far, I have seen only one editor that understands the difference between
TABs and indentation, and that is Emacs.
-- 
Kees



From nagle at animats.com  Thu May 15 01:33:14 2008
From: nagle at animats.com (John Nagle)
Date: Wed, 14 May 2008 22:33:14 -0700
Subject: Another BeautifulSoup crash on bad HTML
Message-ID: <482bc7f2$0$34555$742ec2ed@news.sonic.net>

    Can't really blame BeautifulSoup for this, but our crawler hit a page
("http://clagnut.com/privacy/") with an out of range character escape:

	&#82167;

in this text:

  If you provide a name, email address and/or website and choose &#8216;Remember 
  me&#82167;, these details will be stored as a cookie on your computer.

The author clearly meant "&#8217;", which is a single close quote.

The traceback as BeautifulSoup aborts:

SGMLParser.feed(self, markup or "")
File "/usr/local/lib/python2.5/sgmllib.py", line 99, in feed
self.goahead(0)
File "/usr/local/lib/python2.5/sgmllib.py", line 181, in goahead
self.handle_charref(name)
File "/var/www/vhosts/sitetruth.com/cgi-bin/sitetruth/BeautifulSoup.py", line 
1250, in handle_charref
data = unichr(int(ref))
ValueError: unichr() arg not in range(0x10000) (narrow Python build)

    Another item in our ongoing saga of "What happens when you parse real-world
HTML".

    A try-block in handle_charref would be appropriate.

				John Nagle
				SiteTruth


From efurman at admailinc.com  Fri May 23 19:08:54 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Fri, 23 May 2008 15:08:54 -0800
Subject: csv iterator question
In-Reply-To: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <48374E86.9040901@admailinc.com>

davidj411 wrote:

>When you save an open file to a variable, you can re-use that variable
>for membership checking.
>it does not seem to be that way with the csv.reader function, even
>when set to a variable name.
>
>what is the best way to store the open CSV file in memory or do i need
>to open the file each time?
>
>example of open method on file object:
>fhandle=open(filename).readelines()
>  
>
 >>> fhandle = open('c:/temp/08-02024.csv').readlines()
 >>> type(fhandle)
<type 'list'>
 >>> len(fhandle)
381

fhandle is a list containing the contents of the file, not a file handle 
-- that's why you can easily re-use it.

>example of csv.reader method:
>reader = csv.reader(open(csvfilename))
>  
>
Try this instead:
 >>>reader  = csv.reader(open('c:/temp/08-02024.csv'))
 >>> contents = [line for line in reader]
 >>> type(contents)
<type 'list'>
 >>> len(contents)
381

You still get a list that you can easily use, that has gone through the 
csv routines.

Hope this helps.
--
Ethan



From meesters at uni-mainz.de  Fri May 30 04:17:33 2008
From: meesters at uni-mainz.de (Christian Meesters)
Date: Fri, 30 May 2008 10:17:33 +0200
Subject: seg. fault with Py_BuildValue?
References: <g1mb1l$k82$1@news1.zdv.uni-mainz.de>
	<mailman.1737.1212071482.12834.python-list@python.org>
Message-ID: <g1od6t$n38$1@news1.zdv.uni-mainz.de>


> Check if either x or y are NULL.
They aren't. Just did an explicit check.


From wizzardx at gmail.com  Sat May 10 06:02:25 2008
From: wizzardx at gmail.com (David)
Date: Sat, 10 May 2008 12:02:25 +0200
Subject: Pythonicity of some algorithms
Message-ID: <18c1e6480805100302n532b10c9j13dcd03b2d33e49f@mail.gmail.com>

Hi list.

I have 2 questions about the Pythonicity of some algorithms. One
question is about generator usage, the other is about producer and
consumer threads

GENERATOR QUESTION

Usually for generators, the usage is like this:

for var in generator():
    do_something(var)

I sometimes have cases where I want to use a generator, but I don't
want to stall the main program if the generator function doesn't have
any new data for me (maybe it's retrieving data from a device, but I
want to do other things with the same device if there isn't any data
yet).

So currently, some of my code looks something like this:

def get_serial_data():
    while True:
        block = request_a_packet_from_serial_device() # Get some raw data
        parsed_list = parse_block(block) # Extract a list of records
from the packet
        if parsed_list:
            # The record contains 1 or more records
            for record in parse_list:
                yield record
        else:
            # Sometimes there aren't any records in the packet
            yield None

def thread_function_for_handling_serial_device():
    record_iter = iter(get_serial_data())
    while True:
        record = record_iter.next()
        if record:
            handle_record() # eg: add to a queue for the main thread to process
        other_serial_logic1()
        other_serial_logic2()
        other_serial_logic3()

This works for me. But I'd like to know if this is considered
Pythonic, and if there are other, better ways of doing the above in
Python.

PRODUCER AND CONSUMER THREAD QUESTION

In some of my Python apps I use the producer/consumer model, where the
producer and consumer threads communicate through Queues.

Usually code (in the consumer thread function) looks something like this:

def consumer_thread():
    while True:
        record = some_queue.get()
        process_record(record)

In some cases I'd like to do something unusual to threads consuming a
queue - interrupt them, make them terminate, etc. The problem is that
a lot of the time it's locking, waiting for a record from
some_queue.get()

A few things I've considered:

1) Add a timeout to some_queue.get(), so the loop has a chance to do
other things while waiting for new records. This is problematic
because most of the time there isn't other things for the thread to
do. Also, it won't be able to respond immediately to those events.

2) Add special values to the queue, the purpose of which is to notify
the consumers. This is problematic when you have multiple consumers.
You have to add the exact correct number of 'interrupt' objects to the
queue.

3) Make a custom thread-safe queue class, with an 'interrupt_get'
method. When your app calls queue.interrupt_get(), all threads
currently locking on a queue.get() will continue, but with a
GetInterrupted exception thrown.

Perhaps there is some other Python threading idiom I should be using
in this case. Any suggestions?

David.


From Scott.Daniels at Acm.Org  Thu May  8 08:54:19 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 08 May 2008 05:54:19 -0700
Subject: POP connection timeout.
In-Reply-To: <mailman.753.1210249733.12834.python-list@python.org>
References: <mailman.753.1210249733.12834.python-list@python.org>
Message-ID: <BdydnUiwsriZa7_VnZ2dnUVZ_uOdnZ2d@pdx.net>

Aspersieman wrote:
> I have written an application that queries a POP mailbox and ...
 > I want to have it time out....
> I know that in python 2.5 I could pass an additional timeout parameter 
> to the above statement ( ie: pop = poplib.POP3(POPHOST, POPPORT, 
> TIMEOUTINSECONDS), but I am using python 2.4.
> 
> Can anyone help me implement this timeout functionality.

Obviously, get a copy of 2.5 and back-port the poplib code as
poplib25 or some such.  If you want more help than that, hire
someone to do it.

--Scott David Daniels



From tjreedy at udel.edu  Mon May 12 19:35:53 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 May 2008 19:35:53 -0400
Subject: question about python statements
References: <B9E129828E47994B9B95E1BAABC8868C0B8F06@percello-sbs.percello.local>
Message-ID: <g0ak8n$qc3$1@ger.gmane.org>


"Ohad Frand" <ohad.frand at percello.com> wrote in message 
news:B9E129828E47994B9B95E1BAABC8868C0B8F06 at percello-sbs.percello.local...
| I am looking for a way to programmically get a list of all python
| existing statements that I cannot access by __builtins__ or locals()
| (like ["assert","break","class",...])

You appear to want the keywords that begin statements.  Look at the keyword 
list in the language reference and pick those you want.  Then build that 
list into your program.





From dwblas at gmail.com  Thu May 29 16:25:54 2008
From: dwblas at gmail.com (dwblas at gmail.com)
Date: Thu, 29 May 2008 13:25:54 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <86eaad1f-ee49-4659-b151-3c052f109da4@a9g2000prl.googlegroups.com>

On May 29, 1:36?am, loial <jldunn2... at googlemail.com> wrote:
> only those lines that appear in the 2nd file but not in the 1st file.

set(file_2_recs).difference(set(file_1_recs)) will give the recs in
file_2 that are not in file_1 if you can store both files in memory.
Sets are indexed and so are faster than lists.


From fuzzyman at gmail.com  Mon May 19 08:40:31 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Mon, 19 May 2008 05:40:31 -0700 (PDT)
Subject: New to Python, Discussion Groups.
References: <acefad5e-d7c0-420a-8e3d-b9257410af09@w7g2000hsa.googlegroups.com>
Message-ID: <0ccf8394-7f3e-4fd8-990c-2250045acac3@m3g2000hsc.googlegroups.com>

On May 19, 1:34 am, cmoller <cmol... at dpbioventures.com> wrote:
> Hi,
>
> I am new to Python and the use of discussion groups. Is there a FAQ
> for basic information so certain questions are not repeated?
>
> I am NOT an experienced programmer, but have decided to write a data
> logger for sensors sending data via an internal ethernet work to
> machines running OS X (Intel). The program should store data and allow
> real time plotting. It does not need a beautiful GUI, but I may want
> to share the program with others, so it should be somewhat intuitive.
> It looks like I could use Python to access MS Excel, which would
> significantly reduce the effort, but I am not sure if this is
> practical. I am not in a hurry and would approach the problem as a way
> to learn.
>


You could also use Resolver One, a spreadsheet program that lets you
put Python code inside your spreadsheets (effectively providing a
'spreadsheet-like' front end to the code you write).

http://www.resolversystems.com/
http://www.resolverhacks.net/


All the best,

Michael Foord
http://www.ironpythoninaction.com/


> The data I am processing is readily seen via telnet so I know it's
> there.
>
> Is Python a good choice or should I invest in learning a language well
> known to be best for applications like this? Are there other key
> topics in addition to network programing that I should be focusing on?
>
> Thanks,
>
> Chris



From sarenius at sun3.oulu.fi  Sun May 25 15:30:58 2008
From: sarenius at sun3.oulu.fi (Vesa-Matti Sarenius)
Date: Sun, 25 May 2008 19:30:58 +0000 (UTC)
Subject: UTF problem?
References: <slrng3j7ha.hio.sarenius@sun3.oulu.fi>
	<mailman.1575.1211740436.12834.python-list@python.org>
	<slrng3jf96.hio.sarenius@sun3.oulu.fi>
Message-ID: <slrng3jfji.hio.sarenius@sun3.oulu.fi>

In article <slrng3jf96.hio.sarenius at sun3.oulu.fi>, Vesa-Matti Sarenius wrote:
>In article <mailman.1575.1211740436.12834.python-list at python.org>, Tim Golden wrote:
>>so it's just possible that one of your filenames has
>>a non-ascii char in it without your noticing? (Altho'
>>I'd find that an odd character to include in a filename).
>
>There is somewhere since printing worked when I changed the filename
>completely.

I found the problem place, it is:

cmd = '''"C:\\Program Files\\Ghostgum\\gsview\\gsprint.exe" -color ''' + 
full_filename

and with that the full_filename has something utf. I tried repr or .encode
("utf8") there but got "file not found" althougt the script itself worked.

-- 
Vesa-Matti Sarenius, M.Sc.      * * * * * * * * * * * * * * * * *
mailto:sarenius at koivu.oulu.fi   *  Music seems to help the pain *
Lecturer, mathematics education *  R.I.P. Syd, my hero          *
University of Oulu, Finland     * * * * * * * * * * * * * * * * *





From castironpi at gmail.com  Sat May 17 06:19:59 2008
From: castironpi at gmail.com (castironpi)
Date: Sat, 17 May 2008 03:19:59 -0700 (PDT)
Subject: Instance of class "object"
References: <mailman.1214.1210927611.12834.python-list@python.org> 
	<95854850-a48a-4ce9-a55e-5820d0651925@b64g2000hsa.googlegroups.com>
Message-ID: <6f5f1e80-d91b-4eda-a2c2-a278a31fe5ca@m36g2000hse.googlegroups.com>

On May 17, 1:09 am, Carl Banks <pavlovevide... at gmail.com> wrote:
> On May 16, 4:46 am, "??" <littlesweetme... at gmail.com> wrote:
>
> > Howdy,
> >     I wonder why below does not work.
>
> > a = object()
> > a.b = 1        # dynamic bind attribute failed...
>
> > To make it correct, we have to create a new class:
> > class MyClass(object): pass
> > a = MyClass()
> > a.b = 1       # OK
>
> > Does this strange behavior break the LSP (Liskov substitution principle)?
>
> I suspect it's possible to come up with a property that causes LSP to
> be violated for any two given distinct classes.
>
> For example, if the property you're considering is "Raises an
> exception when you try to access an attribute", then yes, the subtype
> cannot be substituted for the base type and would violate LSP.
> However, that's not really such a useful property in most cases.
>
> The reason instances of object don't have dynamic attributes is
> because dyanmic attributes are internally represented by a dict
> object.  To keep memory footprint low, instances of many built-in
> types don't have an associated dict and so can't bind attributes
> dynamically.  Instances of object can't have an associated dict
> because, if they did, it would mean all objects would have to have an
> associated dict, because all types are subclasses of object.
>
> Because of this, direct instances of object really don't have much use
> in Python.  It's one main use case is as a sentinel or marker of some
> sort.  It's only useful property is that it is itself, and nothing
> else.  But, that property is true of all instances in Python;
> therefore any instance may be substituted for an object instances,
> therefore it satisfies LSP.
>
> (Phew: what a tangle of nomenclature that was.)
>
> Carl Banks

Python is the same language on sufficiently many distinct machines
that all the people can use it if they want.  That means identical
outputs.  Do their 100%-ers go with the times?


From jorge.vargas at gmail.com  Tue May  6 02:36:07 2008
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Tue, 6 May 2008 02:36:07 -0400
Subject: config files in python
In-Reply-To: <e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<pan.2008.05.05.17.22.31.608410@virgilio.it>
	<a761ad8b-ffe9-480d-b919-d5051b90bce2@m45g2000hsb.googlegroups.com>
	<ad4e6362-ced9-469f-8241-212077f8e967@l42g2000hsc.googlegroups.com>
	<e529cbe1-f027-4417-aaf6-1db639b4a5b5@y18g2000pre.googlegroups.com>
Message-ID: <32822fe60805052336ued36682ne1023d50a92ad3c8@mail.gmail.com>

On Tue, May 6, 2008 at 2:00 AM, sandipm <sandip.more at gmail.com> wrote:

>
>  here I would like to have python file which read conf from text file
>  and load those params in current process space.
>  so only importing that python file should read up the conf file and
>  load the current process with configurable parameters.
>  I thought this would be good way to do it, rather than getting
>  involved in slightly complicted reload mechanisms of python modules?
>
I think you should work your way into a proper configuration system.

for ones you can use the buildin module
http://docs.python.org/lib/module-ConfigParser.html

or migrate to the more powerful configObj
http://www.voidspace.org.uk/python/configobj.html
>

with configobj, you will have an instance in memory that you can
modify on runtime with a gui or something and when you hit save it
will rewrite the new config file.
>
>  Regards,
>  Sandip
>
>
>
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From sharma.mohit80 at gmail.com  Wed May 21 02:13:38 2008
From: sharma.mohit80 at gmail.com (rema.khan)
Date: Tue, 20 May 2008 23:13:38 -0700 (PDT)
Subject: online computer shops
Message-ID: <eb4f9b60-a5d0-4ac0-9661-01eb0f6fda48@g16g2000pri.googlegroups.com>

    * Drives & Writers,
    * Hard Drives & Storage,
    * Headphones & Mics,
    * Internet / Internet Telephony,
    * Keyboards & Mouse,
    * Memory / RAM,
    * Memory Card & Readers,
    * Modems,
    * TV Tuner Cards,
    * UPS,
    * USB Devices,
    * WebCams,
    * Wireless Accessories........ a big computer peripherals shop
from online please visit -
http://www.homeshop18.com/shop/u/y/c-Computers-Q-and-Q-Peripherals/Home_Online-clI_2-cI_909-


From daveparker at flamingthunder.com  Mon May 12 20:07:30 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Mon, 12 May 2008 17:07:30 -0700 (PDT)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <a6681465-a1fa-4b0d-b712-a7a8ef0fe8e2@w8g2000prd.googlegroups.com>

On May 10, 8:19?pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.

I agree; it's a common flaw with lots of languages, not just Python.

I'd be inclined to use something like:

FOR 8 TIMES DO <statement>.

or:

REPEAT <statement> FOR 8 TIMES.

as a compromise between readability and machine-parsability.

If anyone has other suggestions, please post them here and I'll
implement one of them next weekend in Flaming Thunder.


From gagsl-py2 at yahoo.com.ar  Fri May  9 01:12:17 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 02:12:17 -0300
Subject: explain this function to me, lambda confusion
References: <cbc881c5-3de4-4305-b33f-26fea993c61a@d45g2000hsc.googlegroups.com>
	<b2b7ff0b-922e-4ecf-9d04-50ce22243624@a9g2000prl.googlegroups.com>
	<Xns9A985D454FA54duncanbooth@127.0.0.1>
	<bbcd3fb4-8f65-45ed-9f37-58aa95006dcb@w5g2000prd.googlegroups.com>
Message-ID: <op.uavfernfx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 May 2008 22:57:03 -0300,  
<andrej.panjkov at climatechange.qld.gov.au> escribi?:

> On May 8, 6:11 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
>> No, no, no, no, no!
> Geez.  Go easy.
>> You have got it entirely wrong here. Your XOR function simply
[...]
> Pardon my tetchiness, but it is a little hard to receive such blunt
> and inflexible replies to my posts.

Don't take it so seriously. I would have written a reply in the same tone.  
Weeds must be uprooted early :)

> Both the responses offer lambda free alternatives.  That's fine, and
> given the terse documentation and problems that I had understanding
> them, I would agree.  So what applications are lambdas suited to?  I
> think the parameterised function model is one.
> What else?

It should be clear now that lambda is just a shortcut for defining a  
normal function using "def", except it has no name, and it can handle  
expressions only (no statements).
So you never *need* a lambda. But in a few cases they're useful:

- Most GUIs are event-driven, and let you bind a function (or any other  
callable object) to be executed when certain event happens (by example,  
when certain button is pressed, or a menu item is selected). Usually an  
instance method is used: Button("Total", onclick=self.calculate_total).  
Suppose you're developing a calculator; the ten buttons labeled '0' to '9'  
should inserte the corresponding digit. To do that, you should write ten  
functions insert_digit_0 to insert_digit_9 (and they would be  
one-line-functions: insert_digit('0') ... insert_digit('9')). Too boring :(
The usual idiom is something like this:
     Button("0", onclick=lambda: self.insert_digit('0'))
     Button("5", onclick=lambda: self.insert_digit('5'))

- To write an expression that is to be evaluated lazily (perhaps only if  
certain other conditions are met). Older Python versions didn't have a  
conditional expression like C's :? ternary operator, and one possible way  
to emulate it is this:

def iif(cond, if_true, if_false):
     if cond:
         return if_true()
     else:
         return if_false()

iff(x!=2, lambda: 1/(x-2), lambda: 100)

You can't write iff(x!=2, 1/(x-2), 100) because arguments are evaluated  
before the function is called, and with x=2 you get an error.

-- 
Gabriel Genellina



From spam-trap at telus.net  Thu May  1 01:05:12 2008
From: spam-trap at telus.net (L. Lindstrom)
Date: Thu, 01 May 2008 05:05:12 GMT
Subject: Python 2.6 and wrapping C libraries on Windows
In-Reply-To: <_X8Sj.3499$XI1.3261@edtnps91>
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org>
	<_X8Sj.3499$XI1.3261@edtnps91>
Message-ID: <cccSj.3526$XI1.939@edtnps91>

L. Lindstrom wrote:
> Christian Heimes wrote:
>> L. Lindstrom schrieb:
[snip]
>>> [B]esides heap management and FILE pointers, is there any reason SDL, or
>>> any C dependency, needs to link to the same C run-time as Python? If I
>>> ensure SDL frees memory it allocates and does not directly access a file
>>> opened by Python can I just use another C run-time such as msvcrt?
>>>
>>
>> Your analysis of the problem and the implication of mixing CRTs is
>> correct. However ...
>>
>> It should be trivial to modify the build systemof SDL so that the
>> manifest is integrated into the DLLs. Everything else is a hack. It
>> *should* work and in reality it *does* work for most cases. But someday
>> you'll hit a solid wall and get strange and hard to debug segfaults.
>>
[snip]
> Linking to msvcr90.dll is possible with MinGW. The problem is with the 
> configure scripts. So I can run configure against msvcrt.dll, then 
> switch to mscvr90.dll for make. If this works I will make SDL and a test 
> program available on-line so someone can find the appropriate manifests.
> 
> 
Here is my attempt to link SDL and a test program with msvcr90.dll. It 
can be found at http://www3.telus.net/len_l/pygame . The md5sum is:

f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip

Both lack a manifest. The test program and SDL work when a surrogate 
run-time is provided, a renamed msvcr71.dll . So if someone can show me 
the necessary manifest to make SDL use the C run-time installed by the 
Python 2.6 installer I would appreciate it. SDL is built with MinGW so I 
doubt I can distribute the run-time with it.

-- 
Lenard Lindstrom
"%s@%s.%s" % ('len-l', 'telus', 'net')


From ravinderthakur at gmail.com  Wed May 21 13:28:25 2008
From: ravinderthakur at gmail.com (=?UTF-8?B?4KSw4KS14KWA4KSC4KSm4KSwIOCkoOCkvuCkleClgeCksCAocmF2aW5kZXIgdGhha3VyKQ==?=)
Date: Wed, 21 May 2008 10:28:25 -0700 (PDT)
Subject: extracting title and/or summary of a website
Message-ID: <538c89e3-606e-46cb-9f14-671b257e037f@z72g2000hsb.googlegroups.com>

hello friends,


is there any lib in python that provides a mechanism to get the title
of a web page ? also is there anything available to get a nice summary
like the way google shows below every link ?


thanks
ravinder thakur


From castironpi at gmail.com  Thu May  8 19:54:22 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 16:54:22 -0700 (PDT)
Subject: threading - race condition?
References: <de39fb24-8e2a-4d40-9989-89ba936470ca@w34g2000prm.googlegroups.com>
Message-ID: <bfda2528-dc49-4f7b-b9a8-3cd65549bcdc@d77g2000hsb.googlegroups.com>

On May 8, 5:45?pm, skunkwerk <skunkw... at gmail.com> wrote:
> i'm getting the wrong output for the 'title' attributes for this
> data. ?the queue holds a data structure (item name, position, and list
> to store results in). ?each thread takes in an item name and queries a
> database for various attributes. ?from the debug statements the item
> names are being retrieved correctly, but the attributes returned are
> those of other items in the queue - not its own item. ?however, the
> model variable is not a global variable... so i'm not sure what's
> wrong.
>
> i've declared a bunch of worker threads (100) and a queue into which
> new requests are inserted, like so:
>
> queue = Queue.Queue(0)
> ?WORKERS=100
> for i in range(WORKERS):
> ? ? ? ? thread = SDBThread(queue)
> ? ? ? ? thread.setDaemon(True)
> ? ? ? ? thread.start()
>
> the thread:
>
> class SimpleDBThread ( threading.Thread ):
> ? ?def __init__ ( self, queue ):
> ? ? ? ? ? ? ? ? self.__queue = queue
> ? ? ? ? ? ? ? ? threading.Thread.__init__ ( self )
> ? ?def run ( self ):
> ? ? ? ? ? ? ? ? while 1:
> ? ? ? ? ? ? ? ? ? ? ? ? item = self.__queue.get()
> ? ? ? ? ? ? ? ? ? ? ? ? if item!=None:
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? model = domain.get_item(item[0])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? logger.debug('sdbthread item:'+item[0])
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? title = model['title']
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? scraped = model['scraped']
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? logger.debug("sdbthread title:"+title)
>
> any suggestions?
> thanks

I'll base this on terminology: if a model is in a brain (throughout
the known universe), and a dollar's a dollar, it may not pay to build
a computer out of brains.

If man arises as a tool-carrier, we will carry tools, not people.
Don't use Python to make people; make money, and not too much.  Pick a
wage and you might get somewhere.


From s0suk3 at gmail.com  Thu May 22 09:08:31 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 06:08:31 -0700 (PDT)
Subject: Loading contents behind the scenes
Message-ID: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>

Hi, I wanted to know how cautious it is to do something like:

f = file("filename", "rb")
f.read()

for a possibly huge file. When calling f.read(), and not doing
anything with the return value, what is Python doing internally? Is it
loading the content of the file into memory (regardless of whether it
is discarding it immediately)?

In my case, what I'm doing is sending the return value through a
socket:

sock.send(f.read())

Is that gonna make a difference (memory-wise)? I guess I'm just
concerned with whether I can do a file.read() for any file in the
system in an efficient and memory-kind way, and with low overhead in
general. (For one thing, I'm not loading the contents into a
variable.)

Not that I'm saying that loading a huge file into memory will horribly
crash the system, but it's good to try to program in the safest way
possibly. For example, if you try something like this in the
interpreter on a Windows machine, everything will start working
slowly, and you'll likely have to reboot the OS:

s = ((("abc" * 999999) * 999999) * 99999) * 999999


From malaclypse2 at gmail.com  Wed May  7 21:14:52 2008
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Wed, 7 May 2008 21:14:52 -0400
Subject: web client in Python Q
In-Reply-To: <VIrUj.662659$us.202429@fe04.news.easynews.com>
References: <VIrUj.662659$us.202429@fe04.news.easynews.com>
Message-ID: <16651e80805071814had02dc2q5c334f20e55561d1@mail.gmail.com>

On Wed, May 7, 2008 at 8:22 PM, Jive Dadson <notontheweb at noisp.com> wrote:
> Hey folks.  I know approximately zero about web clients.  There's a simple
> task I want to do. (I think it's probably simple.) And I figure a Python
> script ought to be just the ticket.
>
>  Various web services for daily stock ticker info.  For example,
>
>  http://finance.google.com/finance/historical?q=NYSE:APC&output=csv
>
>  and
>
> http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv

That should be a pretty straightforward script.  Take a look at this,
and see if it helps:

>>> import urllib
>>> page = urllib.urlopen('http://finance.google.com/finance/historical?q=NYSE:APC&output=csv')
>>> data = page.readlines()
>>> data[0]
'Date,Open,High,Low,Close,Volume\n'
>>> data[1]
'7-May-08,76.13,77.94,75.60,76.68,9501300\n'
>>> data[1].strip().split(',')
['7-May-08', '76.13', '77.94', '75.60', '76.68', '9501300']

>>> page = urllib.urlopen('http://download.finance.yahoo.com/d/quotes.csv?s=APC&amp;f=sl1d1t1c1ohgv&amp;e=.csv')
>>> data = page.readlines()
>>> data[0]
'"APC",76.68,"5/7/2008","4:01pm",+2.15,76.14,77.94,75.60,9501342\n'
>>> data[1]

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in <module>
    data[1]
IndexError: list index out of range
>>>

The urllib documentation is here: http://docs.python.org/lib/module-urllib.html
Both of those formats look pretty straightforward to parse, but if
you're dealing with more complicated CSV files, take a look at the csv
module.

-- 
Jerry


From google at mrabarnett.plus.com  Sat May 24 12:50:40 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Sat, 24 May 2008 09:50:40 -0700 (PDT)
Subject: Partial download with ftplib and retrbinary
References: <9dd32f80-ce21-4c2c-8eba-1afd3b80379f@x41g2000hsb.googlegroups.com>
Message-ID: <1c7b8253-92c5-4753-aa13-83df838bf2a9@d45g2000hsc.googlegroups.com>

On May 24, 11:53 am, fepeac... at googlemail.com wrote:
> I am breaking/interrupting my connection with the ftp server at
> present when doing a partial download of a file. I have a callback
> with retrbinary that raises an exception and ends the download. The
> problem is that the server is not notified and hangs. I cannot send
> any further commands and need to relogin to download further. Is there
> a way to still continue downloading without having to login again.
>
> My retrbinary function is:
>
> ftp.retrbinary('RETR '+file, handleDownload,1,bound[0])
>
> where bound[0] is an integer specifying the start byte of the
> download.
>
> My callback is:
>
> def handleDownload(block):
>     global count,localfile,number
>     localfile.write(block)
>     if count==number:
>             raise(Exception)
>     count=count+1
>
> where number specifies the number of bytes to download.
>
> Help would be gratefully received.

Have you tried ftp.abort()? The docs say "Abort a file transfer that
is in progress. Using this does not always work, but it's worth a
try.".

I'd also suggest that you download more than 1 byte at a time, perhaps
1024 (fewer if you're on dial-up).


From kamhung.soh at gmail.com  Sat May 17 21:08:42 2008
From: kamhung.soh at gmail.com (Kam-Hung Soh)
Date: Sun, 18 May 2008 11:08:42 +1000
Subject: comparison of files using set function
References: <aa405c1f0805170747y7fd128dwbdf9dd91404c58e4@mail.gmail.com>
Message-ID: <op.ubbr4sftev04yd@hungvista>

On Sun, 18 May 2008 00:47:55 +1000, Beema shafreen  
<beema.shafreen at gmail.com> wrote:

> I have files with two column, column 1 is with id and column 2 is with
> data(sequence)
> My goal is to create a table in such a way, the column one of the table
> should have all the id from the files and next column will be have the
> respective seq of the file1 with correlation to the id and the third  
> column
> will be sequence information of the next file with respective to the id
> original files look like this
>
> 45    ytut
> 46    erete
> 37   dfasf
> 45  dassdsd
>
>
> and so on  for all the 10 files that is it has two column as mentioned
> above.
>
> The output should look like this:
>
> Id    file1      file2     file3     file4   file5
> 43    ytuh    ytuh     ytuh    ytuh    ytuh
> 46   erteee   rty       ryyy              ertyu
> 47   yutio    rrr                    eeerr
>
>
>
> The goal is if the pick all the common id in the files and with their
> respective information in the adjacent rows.
> the various conditons ca also prevails
> 1) common id present in all the files, which have same information
> 2)common id present in all the files, which donot have same information
> 3) common id may not be present in all the files
>
> But the goal is exactly find the common id in all the files and add their
> corresponding information in the file to the table as per the view
>  my script :
> def file1_search(*files1):
>     for file1 in files1:
>         gi1_lis = []
>         fh = open(file1,'r')
>         for line in fh.readlines():
>             data1 = line.strip().split('\t')
>             gi1 = data1[0].strip()
>             seq1 = data1[1].strip()
>             gi1_lis.append(gi1)
>         return gi1_lis
> def file2_search(**files2):
>     for file2 in files2:
>         for file in files2[file2]:
>             gi2_lis = []
>             fh1 = open(file,'r')
>             for line1 in fh1.readlines():
>                 data2 = line1.strip().split('\t')
>                 gi2 = data2[0].strip()
>                 seq2 = data2[1].strip()
>                 gi2_lis.append(gi2)
>
>             return gi2_lis
> def set_compare(data1,data2,*files1,**files2):
>     A = set(data1)
>     B = set(data2)
>     I = A&B # common between thesetwo sets
>
>     D = A-B #57 is the len of D
>     C = B-A #176 is  the len of c
> #    print len(C)
>  #   print len(D)
>     for file1 in files1:
>         for gi in D:
>             fh = open(file1,'r')
>             for line in fh.readlines():
>                 data1 = line.strip().split('\t')
>                 gi1 = data1[0].strip()
>                 seq1 = data1[1].strip()
>             if gi == gi1:
> #                print line.strip()
>                     pass
>
>     for file2 in files2:
>         for file in files2[file2]:
>             for gi in C:
>                 fh1 = open(file,'r')
>                 for line1 in fh1.readlines():
>                     data2 = line1.strip().split('\t')
>                     gi2 = data2[0].strip()
>                     seq2 = data2[1].strip()
>                 if gi == gi2:
>                    # print line1.strip()
>                     pass
> if __name__ == "__main__":
>     files1 = ["Fr20.txt",\
>               "Fr22.txt",\
>               "Fr24.txt",\
>               "Fr60.txt",\
>               "Fr62.txt"]
>     files2 = {"data":["Fr64.txt",\
>               "Fr66.txt",\
>               "Fr68.txt",\
>               "Fr70.txt",\
>               "Fr72.txt"]}
>     data1 = file1_search(*files1)
>
>     """113 is the total number of gi"""
>     data2 = file2_search(**files2)
>     #for j in data2:
>      #   print j
>     """232 is the total number of gi found"""
>     result = set_compare(data1,data2,*files1,**files2)
>
>  It doesnot work fine... some body please suggest me the way i can  
> proceed .
> Thanks a lot
>

1. Test with a small number of short files with a clear idea of the  
expected result.
2. Use better variable names.  Names such as file1_search, file2_search,  
gi, gi2, A, B, C and D make it nearly impossible to understand your code.

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>



From nospam at here.com  Mon May 19 17:34:20 2008
From: nospam at here.com (Dennis)
Date: Mon, 19 May 2008 22:34:20 +0100
Subject: python confusion possibly related to pickle
In-Reply-To: <mailman.1322.1211139854.12834.python-list@python.org>
References: <xJqdnWPFfMX-Hq3VnZ2dnUVZ8hidnZ2d@posted.plusnet>
	<mailman.1322.1211139854.12834.python-list@python.org>
Message-ID: <rtWdnfLHYfjAb6zVnZ2dneKdnZydnZ2d@posted.plusnet>

Derek Martin wrote:
> On Sun, May 18, 2008 at 08:28:34PM +0100, Dennis wrote:
>> The problem that's got me annoyed is that after getting said error I
>> close the shell window, open a new one, run the python interpreter
>> and type "import pickle" and get the error that the script I'd run
>> earlier caused. Why is this ?
> 
> Well, what's the error?  Sounds like your system could be b0rked (or
> at least your python installation)... but depending on the error,
> there could be other explanations.  
> 

Nah, just a case of being in a directory of my home directory that has a 
file called pickle.py in it. That file has a known error. I then ran 
python interactively and typed "import pickle". As a result I end up 
importing the file in my current directory instead of the python module 
I want to import.

I was just being daft :-D


From stefan_ml at behnel.de  Wed May 21 15:50:55 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 21 May 2008 21:50:55 +0200
Subject: xpath with big files
In-Reply-To: <mailman.1410.1211354074.12834.python-list@python.org>
References: <mailman.1410.1211354074.12834.python-list@python.org>
Message-ID: <48347d1f$0$6543$9b4e6d93@newsspool3.arcor-online.net>

Vladimir Kropylev wrote:
> I've encountered a problem when trying to use lxml.etree.xpath with
> big (63Mb) file. It returns empty list on any request.
> Is there any restriction on file size for lxml.etree.xpath?

No.


> This is what I do:
> 
> f=open(filename)
> tree = etree.parse(f)
> f.close()

Consider using

   tree = etree.parse(filename)


> r = tree.xpath('//image')
> print(r)
> 
> it prints:
> []
> 
> What is wrong here?

Does your document use namespaces? In that case, asking for an unnamespaced
"image" will not get you any result.

Stefan


From gagsl-py2 at yahoo.com.ar  Tue May 13 07:18:59 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 May 2008 08:18:59 -0300
Subject: Best way to delimit a list?
References: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>
	<5c339461-b9d9-4b80-aa90-9bdd4d401525@q24g2000prf.googlegroups.com>
Message-ID: <op.ua3a1xzsx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 May 2008 07:46:45 -0300, <dannywebster at googlemail.com> escribi?:
> On May 13, 11:28 am, dannywebs... at googlemail.com wrote:

>> Hi - I have a list returned from popen/readlines, and am wondering how
>> to go about iterating over each item which was returned (rather than
>> currently having the whole lot returned).
>>
>> >>> f=os.open("./get_hostnames").readlines
>
> I did indeed mean "os.popen", no "os.open"

Ouch, replace open with popen an my example is valid (but to get the  
meaning I intended to write, replace os.open with open...)

-- 
Gabriel Genellina



From mattheww at chiark.greenend.org.uk  Sun May 25 05:06:21 2008
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 25 May 2008 10:06:21 +0100 (BST)
Subject: Code correctness, and testing strategies
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<18c1e6480805241317s4e960259pa8b2f1f8dc8d67f6@mail.gmail.com>
	<mailman.1555.1211681333.12834.python-list@python.org>
Message-ID: <5hv*dSKds@news.chiark.greenend.org.uk>

Michael L Torrie  <torriem at gmail.com> wrote:
> Watch your programmers then.  They do have to write and debug the
> code. And they will spend at least as much or more time debugging as
> writing the code.  It's a fact.  I have several programmers working
> for me on several projects.  What you have been told is fact.

This isn't the case for everyone. In my workplace the time we spend
debugging is small compared to the time writing the code in the first
place. I wonder what the difference is?

We do use unit-testing quite widely, but by no means everywhere. The
code which doesn't have unit tests doesn't tend to be any buggier than
the code which does. Where testsuites really help is when you have to
upgrade some library or service that your programs are depending on,
and you get to find out about subtle backwards-incompatibilities.

-M-


From jhenRemoveThis at talk21.com  Thu May 29 18:14:17 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Fri, 30 May 2008 08:14:17 +1000
Subject: question
References: <d07e6c41-3a45-4ac1-835d-ece7408201f3@f36g2000hsa.googlegroups.com>
Message-ID: <6a8o5pF34umpoU1@mid.individual.net>

Gandalf wrote:

> how do i write this code in order for python to understand it
> and print me the x variable
> 
> x=1
> def aaaa():
>     x++
>     if x > 1:
>         print "wrong"
>     else :
>         print x
> 
> aaaa()

Example:

x=1
def aaaa(x):
    x += 1
    if x > 1:
        return "wrong"
    else :
       return x

print aaaa(x)


John


From arnodel at googlemail.com  Sat May 17 03:20:15 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 17 May 2008 08:20:15 +0100
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
	<dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>
	<31750f1d-910b-4fcc-90c0-0df9634f2c73@l28g2000prd.googlegroups.com>
	<ca936dbb-d9cd-4fb3-88d5-ec573f064fb9@d77g2000hsb.googlegroups.com>
	<7268f446-17b8-41bb-9d8e-e828f1e74053@c19g2000prf.googlegroups.com>
Message-ID: <m2zlqp75xs.fsf@googlemail.com>

dave.g1234 at gmail.com writes:

> On May 16, 2:47 pm, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
>> On 16 mai, 23:23, dave.g1... at gmail.com wrote:
>>
>> > Thanks for the responses.  I'm well aware that the function can be
>> > passed in the parameters, passing in the functino as an arg defeats
>> > the purpose of what I'm going after.
>>
>> Why so ?
>> > @ Arnaud - Nice. I'm not sure what the performance of mine vs. yours,
>> > but a perfunctory glance looks like we're doing the close to the same
>> > thing.  Maybe one advanage to doing it wrap(x).foo().... is that you
>> > can pass in other parameters to foo.
>>
>> I may be wrong (if so please pardon my lack of intelligence and/or
>> provide a couple use case), but it looks like you're trying to
>> reinvent partial application.
>>
>> from functools import partial
>> def foo(x, y):
>>   return x + y
>>
>> pfoo = partial(foo, 2)
>> print pfoo(42)
>>
>> Don't know if this helps...
>
> Ok, so that solves the issue of the aforementioned compose function.
> We could do compose( partialfoo,....) ) etc (although I might say I
> prefer wrap(x).foo(23).foo(16 ..etc )  The original idea was to
> provide wrapper around an object that lets you call abritrary
> functions on that object with it as a parameter - i.e., as if it were
> a method in a class.  The partial function was only a component of the
> code I posted earlier. Or am I missing something you're saying?

Ok so you want to do

    wrap(x).foo(42).bar('spam')...

What is the advantage over

    foo(x, 42)
    bar(x, 'spam')
    ...

?

-- 
Arnaud


From bignose+hates-spam at benfinney.id.au  Thu May 29 17:57:40 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 30 May 2008 07:57:40 +1000
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
Message-ID: <87y75srcx7.fsf@benfinney.id.au>

Nikhil <mnikhil at gmail.com> writes:

> or a string iterable ? How can I do that. I have lots of '\r\n'
> characters in the string which I think can be easier if it were made
> into a list and I can easily see if the required value (its a numeral)
> is present in it or not after some position or after some characters'
> position.

What problem are you trying to solve?

Are you aware that Python file objects are already iterable, yielding
one line of text per iteration?

    input_file = open("foo.txt")
    for line in input_file:
        do_stuff(line)

-- 
 \        "I'd take the awe of understanding over the awe of ignorance |
  `\                                       any day."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From python at bdurham.com  Wed May  7 17:29:12 2008
From: python at bdurham.com (python at bdurham.com)
Date: Wed, 07 May 2008 17:29:12 -0400
Subject: Generate labels for a multi-level outline
In-Reply-To: <12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>
References: <mailman.680.1210110208.12834.python-list@python.org>
	<64734826-d678-4377-8307-ae3fc1933c16@24g2000hsh.googlegroups.com>
	<12bfe5e4-86ff-4706-bf42-4273a9938046@l64g2000hse.googlegroups.com>
Message-ID: <1210195752.23534.1251967793@webmail.messagingengine.com>

Castironpi,

> Do you want send and throw in it too?

If its not too much trouble, I would love to see how you add these.

> formatter.NullFormatter.format_counter
> formatter.NullFormatter.format_letter
> formatter.NullFormatter.format_roman

I'm not sure what you mean by the above lines ... <googling> ... are you
referencing formatter.py?
http://www.koders.com/python/fid4B7C6E1C20384FC7521414F46DF9DAA33DF2CA11.aspx

Thanks for your help on this - I'm learning a lot! 

Malcolm

PS: "throw( up )" ... very funny! :)


From carsten.haese at gmail.com  Tue May  6 08:55:21 2008
From: carsten.haese at gmail.com (Carsten Haese)
Date: Tue, 06 May 2008 08:55:21 -0400
Subject: Comparing strings - akin to Perl's "=~"
In-Reply-To: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
Message-ID: <ZyYTj.13423$GE1.2802@nlpi061.nbdc.sbc.com>

krumblebunk at gmail.com wrote:
> for foo in sc.query(sql).dictresult():   <- this returns a dict of the
> result
>     f=dict(foo)
>     for k in f.iteritems()
>         if k == '^Hostname':               <-- need this sort of
> behaviour - match a partial string.
>         print "%s" % f[3]              <-- ..and if true, need to pull
> out the 4th column on that line.
> 
> This breaks spectacularly -

Several observations:

* "breaks spectacularly" is not a useful description of a failure. If 
you get an exception, show us the exception. If you get an unexpected 
result, show us the result and tell us how it differs from the result 
you expected.

* To check whether a string starts with a given string, use the 
startswith() method: if k.startswith("Hostname"): ...

* Why the "f=dict(foo)"? Isn't foo already a dictionary?

* Since f is a dictionary, presumably keyed on column names, f[3] is 
unlikely to work. You're going to have to use the name of the fourth 
column to pull out the value you're looking for.

HTH,

--
Carsten Haese
http://informixdb.sourceforge.net


From f.pollastri at inrim.it  Thu May 22 08:50:04 2008
From: f.pollastri at inrim.it (Fabrizio Pollastri)
Date: Thu, 22 May 2008 14:50:04 +0200
Subject: merging the global namespaces of two modules
In-Reply-To: <cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
References: <mailman.1469.1211449697.12834.python-list@python.org>
	<cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
Message-ID: <48356BFC.7010700@inrim.it>

Jeff wrote:
> Can you be more specific?  modA and modB don't import from each other
> but both need to access objects in the global namespace of what
> module?  The controlling application?

> Or do you mean that, for
> example, modA needs to access some functions in modB, but does not
> have import statements to do so, and you want the controlling program
> to do the imports for it?

Exactly this.

> If that is the case, that is bad
> programming practice in Python.  Python is not C and you can't just
> share header files :)

Ok. I know that I want a python import to behave like a C include, it is so bad?

The motivation arise from a family of applications that import, among others, 
two modules: a basic one and a specific one. The specific one is chosen from a 
set of modules at import time depending on other imported modules, so the basic 
module can known its external references against the specific module only at run 
time.

One solution can be:
-the application imports the basic module,
-the basic module selects the proper specific module among the allowable 
specific modules,
-the basic module imports the selected module with an __import__ call equivalent 
to "import selected_module_X as select_module",
-Any reference to the specific module in the basic module is written in the form 
"selected_module.object_name".

Any better solution?


Fabrizio.


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 10:44:25 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 16:44:25 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <g11bft$7b4$3@registered.motzarella.org>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>	<69bi20F31j4kdU1@mid.uni-berlin.de>	<mailman.1337.1211191001.12834.python-list@python.org>	<483406a0$0$10773$426a74cc@news.free.fr>	<g11128$n1n$2@registered.motzarella.org>	<48342ff3$0$20826$426a34cc@news.free.fr>
	<g11bft$7b4$3@registered.motzarella.org>
Message-ID: <4834353c$0$15524$426a74cc@news.free.fr>

Richard G Riley a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
> 
>> Richard G Riley a ?crit :
>>> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> writes:
>> (snip)
>>
>>>> And not that useful - why would one care about the function being
>>>> defined in class X or Y when one have the exact file and line ?
>>> Very obvious I would think. One can develop ones own interactive class
>>> browser and code navigator.
>> From the traceback ?
>>
>>>  One can not bring up class help from "line 3
>>> in x.py" but one can from "classname : MyClass at line 2 in z.py". With
>>> the class name I can navigate directly to all sorts of class related
>>> information without the need to delve into a physical usage of it e.g
>>> program.py at line 3.
>> Please bear with me, but I'm afraid I still don't get the point : I
>> don't need tracebacks to get to some object's info (help etc).
> 
> This is a view quite common to people when they are happy with what they
> have. Some like to improve what they have. It is immediately apparent to
> me why having a class name and method name in the traceback would be
> immediately useful.

Then please explain.

> Having written a few extensions to IDEs in the past
> I know it would help me,

To do what ?



From paulgeeleher at gmail.com  Thu May 29 09:20:14 2008
From: paulgeeleher at gmail.com (sophie_newbie)
Date: Thu, 29 May 2008 06:20:14 -0700 (PDT)
Subject: Reporting the line number of an exception
Message-ID: <229d7d86-c652-4282-aaa9-4274cd0d63fd@a1g2000hsb.googlegroups.com>

I'm sure this is exceedingly simple but I can't find it anywhere. When
I catch an exception I would like to report the line number of the
exception as well as the error info.

try:
    someError()
except Exception, e:
    "print_error_and_line_number"

How do I find the line number?

Thanks for any help!


From frank at niessink.com  Mon May 12 05:17:16 2008
From: frank at niessink.com (Frank Niessink)
Date: Mon, 12 May 2008 11:17:16 +0200
Subject: Problem with custom events in wxpython
In-Reply-To: <3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>
References: <4efa4dcf-7f3d-4c82-9177-1ee8b25d9e3d@b5g2000pri.googlegroups.com>
	<mailman.941.1210519666.12834.python-list@python.org>
	<3ab21871-9ac0-489a-ad8a-7db2b9014700@u6g2000prc.googlegroups.com>
Message-ID: <67dd1f930805120217j2cdf503aj8bacdc5cd30ab451@mail.gmail.com>

Hi Jimmy,

2008/5/12 Jimmy <mcknight0219 at gmail.com>:
> On May 11, 11:27 pm, "Frank Niessink" <fr... at niessink.com> wrote:
>  > 2008/5/11 Jimmy <mcknight0... at gmail.com>:
>  > > I have a class A handling some data processing work and another class
>  > > B of GUI matter. I need GUI to display information when data in A is
>  > > updated.
>  > > I know cutom events in wxpython may work.
>  >
> > You may want to look at the pubsub module.
>
>  it works! however, it seems the message can not be exchanged between
>  processes :(
>  actually what I want to do is let a running process send data to GUI
>  process and display it

Well, that is some crucial information you didn't mention in your
original question... I guess for the communication between processes
you can use the regular python batteries available or something like
Pyro. In your GUI process you can use a thread to listen/wait for new
information to display and then send it to the main (GUI) thread. See
http://wiki.wxpython.org/LongRunningTasks

Cheers, Frank


From jcd at sdf.lonestar.org  Tue May 13 08:06:28 2008
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 13 May 2008 08:06:28 -0400
Subject: Backslash frowned upon?
In-Reply-To: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
References: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>
Message-ID: <1210680388.6481.1.camel@jcd-desktop>

On Tue, 2008-05-13 at 03:25 -0700, wxPythoner at gmail.com wrote:
> Why is the  \  backslash character frowned upon? Can I still use it in
> Python 3.0 to achieve the same thing it was designed to do?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Many people think it looks ugly, but it still works, and there are times
when nothing else will do, so it should continue to work for the
foreseeable future.

Cheers,
Cliff



From bruno.desthuilliers at gmail.com  Fri May 16 17:29:33 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:29:33 -0700 (PDT)
Subject: save dictionary for later use?
References: <99403e9d-4c67-4e3f-a726-7bb02e72423a@m3g2000hsc.googlegroups.com>
	<9ec97b27-e4a8-40e0-b8b3-a2cdaeba448e@d77g2000hsb.googlegroups.com> 
	<ab4328f4-5021-4a75-9450-fafaa5468116@24g2000hsh.googlegroups.com>
Message-ID: <21eb068b-0c96-43f0-a71f-0bb1c2be6ec9@y38g2000hsy.googlegroups.com>

On 16 mai, 22:24, globalrev <skanem... at yahoo.se> wrote:
> On 16 Maj, 21:22, jay graves <jaywgra... at gmail.com> wrote:
>
> > On May 16, 2:17 pm, globalrev <skanem... at yahoo.se> wrote:
>
> > > i extract info from one file and put it into a dictionary.
> > > i want to save that dictionary for later use, how do i do that?
> > > might save a list of dictionaries or a list of classobjects too if
> > > there is any difference.
>
> > use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
>
> > ...
> > Jay Graves
>
> pickle.dumps(mg)
> pickle.load(mg)
>
> 'dict' object has no attribute 'readline'
> dumps load(well i dont know but i get no complaint but running load
> generates that error)

What about *READING THAT FUCKING MANUAL* ?

http://docs.python.org/lib/node316.html
"""
dump(obj, file[, protocol])
    Write a pickled representation of obj to the open file object
file. This is equivalent to Pickler(file, protocol).dump(obj).

    If the protocol parameter is omitted, protocol 0 is used. If
protocol is specified as a negative value or HIGHEST_PROTOCOL, the
highest protocol version will be used.

    Changed in version 2.3: Introduced the protocol parameter.

    file must have a write() method that accepts a single string
argument. It can thus be a file object opened for writing, a StringIO
object, or any other custom object that meets this interface.

load(file)
    Read a string from the open file object file and interpret it as a
pickle data stream, reconstructing and returning the original object
hierarchy. This is equivalent to Unpickler(file).load().

    file must have two methods, a read() method that takes an integer
argument, and a readline() method that requires no arguments. Both
methods should return a string. Thus file can be a file object opened
for reading, a StringIO object, or any other custom object that meets
this interface.

    This function automatically determines whether the data stream was
written in binary mode or not.
"""

Example use:

>>> d = dict(a=1, b=2)
>>> f = open("mydict.dat", "w")
>>> pickle.dump(d, f)
>>> f.close()
>>> f = open("mydict.dat")
>>> d2 = pickle.load(f)
>>> f.close()
>>> d2 == d
True
>>> d2
{'a': 1, 'b': 2}
>>>

Now : it's not the first time - in a couple days - that you ask a
question that you wouldn't have asked if you had taken a couple
minutes doing the tutorial and/or reading the doc. This newsgroup is
*very* tolerant (in most other places on usenet, you would have get a
raw RTFM on the first question, and a PLONK on the second), but there
are still limits, and as far as I'm concerned you're not far from
them. So do yourself and the world a favour, read this:
http://catb.org/~esr/faqs/smart-questions.html

and then this:
http://docs.python.org/tut/tut.html

and next time someone points you to a specific module, have mercy and
*read* the doc before posting.

As far as I'm concerned, I won't anwser any of your questions unless
it's obvious that you have followed these advices (but then I'll be
happy to help if I can).



From Lie.1296 at gmail.com  Thu May 15 13:30:55 2008
From: Lie.1296 at gmail.com (Lie)
Date: Thu, 15 May 2008 10:30:55 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com> 
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de> <68tulsF2unducU2@mid.uni-berlin.de>
	<b901ad24-cfef-4a4e-97d7-754b42d9c317@a9g2000prl.googlegroups.com> 
	<68u1lqF2sv8gjU1@mid.uni-berlin.de>
	<ecb733e8-7d6e-420b-a43f-1c0d867afe20@j33g2000pri.googlegroups.com>
	<6ed29b01-30c8-455f-b0be-2b5343e506da@p39g2000prm.googlegroups.com> 
	<2f97dd8d-d2a7-4d2c-910b-047e8db29a1c@f63g2000hsf.googlegroups.com>
Message-ID: <e4123f44-dba6-48b1-85eb-c74f18d33aac@p25g2000pri.googlegroups.com>

On May 15, 4:08?am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> On 14 mai, 08:08, Lie <Lie.1... at gmail.com> wrote:
>
> > On May 14, 12:51 pm, Lie <Lie.1... at gmail.com> wrote:
>
> > > And your 8 by 8 cross compiler doesn't impress me at all, they're all
> > > based on x86/IA-32 architecture which is quite similar, no PowerPC,
> > > SPARC, ARM, no other CISC or RISC architecture. And your compiler is a
> > > single language compiler instead of three dimensional compiler that
> > > GCC is (cross platform, cross target platform, cross language).
>
> > And to add, I also need to mention that Python doesn't need to be
> > compiled at all,
>
> No language needs compilation - it's an implementation problem, not a
> language problem. Now all the Python's implementations I know do use
> compilation (to byte-code).
> > its py and pyo file is architecture independent.
>
> True, but this is not strictly related to being compiled or not.

It's true, it's implementation problem whether a language is compiled
or not, but what I was emphasizing was that Python's code is
architecture independent at all stages (that is visible to the user
and the programmer), on the other hand, a compiled code is a compiled
code is a compiled code, it cannot be architecture independent without
packing multiple binaries in the same executable (like in Macintosh's
universal binary) or using an emulation (with huge overheads) or at
least using a compatibility layer (which doesn't always work) and all
this is done in the layer that is visible to user and programmer
(programmer having to compile against everything and user having to
download the correct executable) instead of being done in a platform
independent way that interpreted language like Python have.


From bignose+hates-spam at benfinney.id.au  Sat May 24 23:21:31 2008
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 25 May 2008 13:21:31 +1000
Subject: class-oriented rather than object-oriented?
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <8763t39ih0.fsf@benfinney.id.au>

notnorwegian at yahoo.se writes:

> does object-oriented refer to that everything(strings, ints etc) are
> all objects? so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

The term is used (and abused) in different ways. The term "object
oriented" is usually an abbreviation of "object-oriented programming",
which contrasts with the older practice of "procedural programming".

It refers to the shift in focus, away from programs that feed data
through a mostly-linear procedural process, and toward programs that
define how objects behave and change state, and interact with other
objects.

> are python functions objects?

Yes.

> can a functional language be object-oriented or an objectoriented
> language be functional?

Yes. Again, it's m ore accurate to say that a language *enables* a
particular style of programming. Python enables procedural
programming, object-oriented programming, and functional programming.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

Classes only exist to define functionality, including the
functionality of creating instances of themselves. It's those
instances that contain state data, and that pass messages back and
forth.

Think of a class as a type definition (and, indeed, types and classes
are now unified in Python since early in the 2.x series), and
instances as specific values of that type. The type defines the
behaviour of its instances, but the instances are what the program
actually uses.

-- 
 \            "Madness is rare in individuals, but in groups, parties, |
  `\         nations and ages it is the rule."  -- Friedrich Nietzsche |
_o__)                                                                  |
Ben Finney


From fiacre.patrick at gmail.com  Thu May 22 12:45:58 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Thu, 22 May 2008 12:45:58 -0400
Subject: Markov Analysis Help
In-Reply-To: <g0lobb$1lu$1@news.xmission.com>
References: <g0lobb$1lu$1@news.xmission.com>
Message-ID: <4835a346$0$11608$607ed4bc@cv.net>

dave wrote:
> Hi Guys,
> 
> I've written a Markov analysis program and would like to get your 
> comments on the code  As it stands now the final input comes out as a 
> tuple, then list, then tuple.  Something like ('the', 'water') ['us'] 
> ('we', 'took')..etc...
> 
> I'm still learning so I don't know any advanced techniques or methods 
> that may have made this easier.
> 
> 
> here's the code:
> 
> def makelist(f):     #turn a document into a list
>     fin = open(f)
>     results = []
>     for line in fin:
>                line = line.replace('"', '')
>         line = line.strip().split()
>         for word in line:
>             results.append(word)
>     return results
> 
> 

What's you data look like?  Just straight text?


> 
> def markov(f, preflen=2):    #f is the file to analyze, preflen is 
> prefix length
>     convert_file = makelist(f)
>     mapdict = {}        #dict where the prefixes will map to suffixes
>     start = 0
>     end = preflen         #start/end set the slice size
>     for words in convert_file:
>         prefix = tuple(convert_file[start:end])     #tuple as mapdict key
>         suffix = convert_file[start + 2 : end + 1]  #word as suffix to key
>         mapdict[prefix] = mapdict.get(prefix, []) + suffix #append suffixes
>         start += 1
>         end += 1
>     return mapdict
> 
> 

What is convert_file??



> 
> def randsent(f, amt=10):     #prints a random sentence
>        analyze = markov(f)
>     for i in range(amt):
>         rkey = random.choice(analyze.keys())
>         print rkey, analyze[rkey],
> 
> 
> The book gave a hint  saying to make the prefixes in the dict using:
> 
> def shift(prefix, word):
>     return prefix[1:] + (word, )

That's not a very helpful hint.

It works if you call it with a tuple and a word --- it shifts off the 
front of the tuple ... so :

shift(('foo','bar') "word")
becomes   ('bar', 'word')

Whoopty doo --- I'm not sure what that accomplishes!!

Unless the author means "pass a list and a randomly pick a word from the 
list" in which case the return statement could be

random.choice(prefix) + (word, )

* shrug *

But -- that's not very Markov ... you'd want a weighted choice of words 
... depending on how you define your Markov chain -- say a Markov chain 
based on part-of-speech or probability of occurrence from a given word-set.

Can you give some more detail??



> 
> However I can't seem to wrap my head around incorporating that into the 
> code above, if you know a method or could point me in the right 
> direction (or think that I don't need to use it) please let me know.
> 
> Thanks for all your help,
> 
> Dave
> 


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 11:25:35 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 17:25:35 +0200
Subject: the lvalue curse? let's play with this crazy idea ;)
In-Reply-To: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
References: <68618c8b-f17e-496a-9092-5e2cd16b365b@p25g2000hsf.googlegroups.com>
Message-ID: <48246ced$0$24456$426a74cc@news.free.fr>

XLiIV a ?crit :
> I started playing with Python and love it since the very beginning,
> programming using Python is so ...human-like? but one thing returns to
> me almost everytime when I see/write the code
> 
> 
> Let's take a look at two ways of thinking...
> the standard one which is well-known and loved by almost everyone :)
> and that crazy concept below which suprised evan me :wacko:
> 
> <code>
> import time
> 
> ftime = time.time()
> localtime = time.localtime(ftime)
> localtime = list(localtime[:3])

You don't need the call to list here.

> localtime = [str(i) for i in localtime]
> print '-'.join(localtime)
> </code>
> 
> It's harder to read than the below concept, isn't?
> Maybe I didn't used to this way of thinking yet. I hope it'll change
> soon or i'll quit ;)
> 
> 
> <almost code>
> time.time() -> ftime -> time.localtime() -> p -> p[:3] -> g -> list(g)
> -> '-'.join()
> </almost code>

print "-".join(map(str, localtime(time.time())[:3]))

or

print "-".join(str[item] for item in localtime(time.time())[:3])


> My example conclusion and not-ansewered-yet question...
> -it's nice to read

Very subjective point here. I'm afraid I don't share your POV.

> and choosing the good names to variables aren't so
> important

> -what is the purpose of the variables here? :)

help debugging ? make code easier to grasp ?

> I realize that there is no chance to implement it,

In Python ? Not a chance, indeed.



From deets at nospam.web.de  Wed May 28 18:10:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 May 2008 00:10:19 +0200
Subject: Python and Flaming Thunder
In-Reply-To: <d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<mailman.1490.1211495188.12834.python-list@python.org>
	<5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>
	<mailman.1697.1211998171.12834.python-list@python.org>
	<dee974ee-cdc1-4dc4-b081-7781b35c6a5c@s21g2000prm.googlegroups.com>
	<6a60ioF360u5uU1@mid.uni-berlin.de>
	<d758c4a0-a47c-4b21-bf04-9e5c443d18f8@k13g2000hse.googlegroups.com>
Message-ID: <6a63igF34irclU2@mid.uni-berlin.de>


> To be fair, the graphics look cool and the "single-asset 8-by-8
> shotgun cross compiler, written entirely in assembly language" sounds
> impressive from an implementation point of view, in the sense that
> building Deep Blue with nothing but NAND gates would; utterly
> impressive and pointless at the same time. Which goes to prove that
> hardcore hackers don't necessarily make decent language designers.

The number 8 seems to play an important role for Dave - his graphics 
claims to be 8D. I wasn't aware that string-theory was available as 
practical application on my screen already...

Diez


From tjreedy at udel.edu  Thu May  1 12:46:34 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 1 May 2008 12:46:34 -0400
Subject: Is vs Equality Operator
References: <706397.16040.qm@web35903.mail.mud.yahoo.com>
Message-ID: <fvcs56$617$1@ger.gmane.org>


"Good Z" <goodz158 at yahoo.com> wrote in message 
news:706397.16040.qm at web35903.mail.mud.yahoo.com...
| Hello,
| I am having problem in using is. Here is what i am doing.
|
| x=''
| if x is None or x is '':
|        return 1

x is not the singleton value None, nor is it the newly created null string 
object.  It is up to the implementation whether each instance of '' reuses 
one cached (or interned) null string object or creates another.  Don't 
depend on such behavior unless you really mean it.  Same goes for comparing 
ints.

|
| The above statement does not return value 1.
|
| If i changed the above check to
| if x == None or x == '':
|        return 1
| Now it works fine.

x still is not None but does equal in value ''

I recommend here

if x is None or x == '': ...

tjr





From a.harrowell at gmail.com  Thu May 29 10:16:47 2008
From: a.harrowell at gmail.com (TYR)
Date: Thu, 29 May 2008 07:16:47 -0700 (PDT)
Subject: Strange thing with types
References: <969d0015-b689-48b0-966e-0f709574deea@m3g2000hsc.googlegroups.com>
	<6a7p3nF364tmpU1@mid.uni-berlin.de>
Message-ID: <5d1250fa-be50-4645-b94b-e75439b99cb7@m3g2000hsc.googlegroups.com>

On May 29, 2:23 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> TYR wrote:
> > I'm doing some data normalisation, which involves data from a Web site
> > being extracted with BeautifulSoup, cleaned up with a regex, then
> > having the current year as returned by time()'s tm_year attribute
> > inserted, before the data is concatenated with string.join() and fed
> > to time.strptime().
>
> > Here's some code:
> > timeinput = re.split('[\s:-]', rawtime)
> > print timeinput #trace statement
> > print year #trace statement
> > t = timeinput.insert(2, year)
> > print t #trace statement
> > t1 = string.join(t, '')
> > timeobject = time.strptime(t1, "%d %b %Y %H %M")
>
> > year is a Unicode string; so is the data in rawtime (BeautifulSoup
> > gives you Unicode, dammit). And here's the output:
>
> > [u'29', u'May', u'01', u'00'] (OK, so the regex is working)
> > 2008 (OK, so the year is a year)
> > None (...but what's this?)
> > Traceback (most recent call last):
> >   File "bothv2.py", line 71, in <module>
> >     t1 = string.join(t, '')
> >   File "/usr/lib/python2.5/string.py", line 316, in join
> >     return sep.join(words)
> > TypeError
>
> First - don't use module string anymore. Use e.g.
>
> ''.join(t)
>
> Second, you can only join strings. but year is an integer. So convert it to
> a string first:
>
> t = timeinput.insert(2, str(year))
>
> Diez

Yes, tm_year is converted to a unicode string elsewhere in the program.


From larry.bates at websafe.com`  Tue May 20 19:53:35 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 20 May 2008 18:53:35 -0500
Subject: persistent deque
In-Reply-To: <OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<aeHYj.12642$hv2.679@bignews5.bellsouth.net>
	<OGHYj.12654$hv2.8128@bignews5.bellsouth.net>
Message-ID: <0uednUCD-McN-a7VnZ2dnUVZ_tzinZ2d@comcast.com>

inhahe wrote:
>   def __init__(self, filename, initial):
> 
> should be
> 
>   def __init__(self, filename, initial=[]):
> 
> (that was the whole reason i put the filename first.)
> 
> sorry.
> 
> 
> 
Defaulting initial to empty list this way is asking for trouble.  You should
default it to None and check for None and reset to empty list.

-Larry


From inhahe at gmail.com  Thu May 22 11:20:56 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 11:20:56 -0400
Subject: persistent deque version 4
References: <29451c2a-cb0a-43a6-b140-6c16e3cb46ac@c65g2000hsa.googlegroups.com>
	<XF1Zj.78287$%15.22707@bignews7.bellsouth.net>
Message-ID: <DagZj.61385$3v1.14491@bignews3.bellsouth.net>


"inhahe" <inhahe at gmail.com> wrote in message 
news:XF1Zj.78287$%15.22707 at bignews7.bellsouth.net...
>
> 4. can someone tell me if the way i'm using the decorator is sane?  i've 
> never used decorators before. it just seems ridiculous to a) define a 
> lambda that just throws away the parameter, and b) define a meaningless 
> function to pass to that lambda.
>


I thought about the fact that a decorator is merely syntactic sugar, so it 
shouldn't have any closure magic that I can't make myself, and I realized 
that I could have done it the following way:

def makefunc(func):
  def func2(instance, *args):
    result = func(instance, *args)
    instance.save()
    return result
  return func2

for name, func in deque.__dict__.items():
  if (not name.startswith("_")) or name in ('__delitem__', '__setitem__'):
    setattr(pdeque, name, makefunc(func))





From ptmcg at austin.rr.com  Mon May 12 15:10:35 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 12 May 2008 12:10:35 -0700 (PDT)
Subject: py3k concerns. An example
References: <5ee783c4-faf4-441f-aa23-5b3ade724521@p25g2000hsf.googlegroups.com>
	<c5e16a32-3a7d-49fd-9689-81aadd502d7f@a70g2000hsh.googlegroups.com> 
	<c9a74353-d759-4821-aa0c-7eb32c251878@h1g2000prh.googlegroups.com> 
	<fuiqnh$6pr$1@rumours.uwaterloo.ca>
	<mailman.10.1208829726.6645.python-list@python.org> 
	<e366839f-82a5-43e6-ac5f-b54463a93295@a22g2000hsc.googlegroups.com> 
	<4810977E.3060509@v.loewis.de>
Message-ID: <201f1ccf-c78c-4392-a97b-01625b1a946f@e39g2000hsf.googlegroups.com>

On Apr 24, 9:21?am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > Again, to me, this is a non-issue because I've been able to create a
> > cross-version compatible single codebase for pyparsing. ?But it was a
> > bit dicey there for a while, and I think other module developers/
> > maintainers may not be so lucky.
>
> I'm more optimistic. I tried it for Django, and while the port is not
> complete, it goes really well and supports "basic" operations (i.e.
> the Django tutorial).
>
> Based on your experience, and other reports, I think there is a fair
> chance that you can support a wide range of versions (2.x and 3.x)
> from a single code base for most projects.
>
> > - create (if possible) single cross-version compatible code
> > - forego support of 3.0 users
> > - discontinue pre-2.6 support for future versions of their module
> > - maintain dual codebase
>
> One needs to consider the drawbacks in each case; for the single
> codebase approach, the drawback probably is that readability
> suffers, and the need for testing increases (but it does always
> if you support multiple targets). It also requires expertise to
> create such cross-version code in the first place, but that's
> "just" a learning issue (i.e. you have to keep the rules in mind
> that you want to follow).
>
> Regards,
> Martin

Martin --

Well, my concerns about 3.0 continue to be founded.  Up until now I
have been just reading "What's New" docs, and relying on input from
others as to what changes I will have to make.  Yesterday I downloaded
and installed 3.0a5, and it is clear that there is *no* way to have a
single code base for any but the most trivial module.

The biggest sticking point is the incompatibility of "except" syntax.
Apparently the promise of syntax compatibility in the 3.0a4 docs was
an overstatement.  Syntax can't be conditionalized out with "if
version >= 3:" type code, so I must have separate Python 2.x and
Python 3.x codebases, as will anyone whose modules include exception
handlers.

I also tripped over the conversion from "<iterator>.next()" to
"next(<iterator>)".  Fortunately, this only occurs in my test cases,
so my runtime module will not be affected by extra conditional
testing, just to pick the right code form for the particular Python
version that is running.

Conversion of print from statement to function is definitely more
painful than I thought it would be.  Again, I am fortunate that this
largely affects only my test code, with only minimal impact on my
runtime module.

I continue to struggle with some of the refactoring done in references
to func.func_code, im_self, etc. changing to __code__, __self__, and
so on.  There is a bit of code in Pyparsing that normalizes user
callbacks to a standard call using 3 arguments, and I have to
compensate for functions that have self args, or are callables.  I see
that there is some movement to "get rid of bound methods," but I don't
fully understand how this will be done, nor how I will adjust my code
to compensate.

In fact, I will probably set this effort aside for now, so as to avoid
converting/conditionalizing code to alpha versions of Python, and
having to change them again for later alphas or the final release.

By the way Martin, your work on 2to3 was especially helpful in this
effort - thank you!

In summary, I am adjusting my plans for future support of Python
versions in pyparsing.  As of a pyparsing release some time after
August, I will only support Python 3.0 versions with any new features
or bugfixes, and the pyparsing version that is compatible with Python
2.x will be frozen.

-- Paul


From alokkat at gmail.com  Fri May  2 18:24:06 2008
From: alokkat at gmail.com (Alok Kumar)
Date: Fri, 2 May 2008 18:24:06 -0400
Subject: HTTP Error code Info
Message-ID: <e3a81e680805021524h4fb8cf1er82be611b41686d08@mail.gmail.com>

Hi
I could get the HTTP error code using
try:
..
except:
..
else:

block.  Is there any better way to get the HTTP Error code using urllib2
lib. Something like know the  exact  response number (200, 404 etc) without
the above block.

Regards
Alok Kumar
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From jeremy+complangpython at jeremysanders.net  Tue May  6 11:26:06 2008
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 06 May 2008 16:26:06 +0100
Subject: Reversing a dict?
References: <6e3fdb8c-687f-42b6-b544-19c88950cc00@q1g2000prf.googlegroups.com>
Message-ID: <fvptae$2ve$1@gemini.csx.cam.ac.uk>

krumblebunk at gmail.com wrote:

> Hi - further to my earlier query regarding partial matches (which with
> all your replies enabled me to advance my understanding, thanks), I
> now need to reverse a dict.

There is no guaranteed order to the items stored in a dictionary. They can
and will move around as the dict is modified. Have a look at
diveintopython:

http://www.diveintopython.org/getting_to_know_python/dictionaries.html

You'll have to store your keys in a list or tuple to keep them ordered.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From wizzardx at gmail.com  Sat May 10 03:49:34 2008
From: wizzardx at gmail.com (David)
Date: Sat, 10 May 2008 09:49:34 +0200
Subject: Find more than one error at once
In-Reply-To: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
References: <ee47cb6c-b092-481e-91a6-ef5298b845e2@e39g2000hsf.googlegroups.com>
Message-ID: <18c1e6480805100049x5835278m515fdf9e2a9a4177@mail.gmail.com>

On Sat, May 10, 2008 at 8:38 AM, Joseph Turian <turian at gmail.com> wrote:
> Is it possible to coax python to find more than one error at once?
>
> Thanks,
>  Joseph
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Sounds like you want to catch and log exceptions.


From wizzardx at gmail.com  Thu May  8 10:02:43 2008
From: wizzardx at gmail.com (David)
Date: Thu, 8 May 2008 16:02:43 +0200
Subject: "prove"
In-Reply-To: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
References: <9f4be2240805080650k1d901608j98ac248ce4174b30@mail.gmail.com>
Message-ID: <18c1e6480805080702s55b7bc59qb91250938ef9defe@mail.gmail.com>

>  classname.functionname(objectname)

Do you mean something like this?

class myclass:
    @staticmethod
    def myfunction(myobject): pass

myobject = None
myclass.myfunction(myobject)

If so, then you want to check the staticmethod decorator, described here:

http://docs.python.org/lib/built-in-funcs.html

David.


From hdante at gmail.com  Sat May 10 23:05:17 2008
From: hdante at gmail.com (hdante)
Date: Sat, 10 May 2008 20:05:17 -0700 (PDT)
Subject: Now what!?
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com> 
	<68m0i1F2t8265U1@mid.uni-berlin.de>
	<KRkVj.1700$_01.929@fe091.usenetserver.com> 
	<7363f4c0-1dec-4943-a9f6-7a24c3aff971@e39g2000hsf.googlegroups.com> 
	<9GlVj.168$PE5.102@fe087.usenetserver.com>
	<SrednbImuZGzm7vVnZ2dnUVZ_vWdnZ2d@earthlink.com> 
	<s6qVj.8627$Qw5.2820@fe107.usenetserver.com>
Message-ID: <8eb3fdfb-b8ae-4a1f-a2f3-fde46206b637@d77g2000hsb.googlegroups.com>

On May 10, 8:22?pm, notbob <not... at nothome.com> wrote:
> On 2008-05-10, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>
> > ? ?So... in short, you'd need to have been reading a tutorial specific
> > to "shell" scripting...
>
> I have been. ?I'm also trying to learn bash shell scripting, not to mention
> sed/awk, php, etc. ?I should have started this a long time ago, but I'm lazy

 Throw all of this away and learn just python. That will be much
simpler for you.

> and, like I said, I'm not particularly fond of coding. ?Yes, I have learned
> basic C and basic , but never beyond intro. ?Now, I'm doing it because I'm a

 Forget basic and learn python. Later you can learn C.

> geezer and I figure my brain needs more exercise then just blabbing on
> usenet. ?Besides, I've been cruising while using linux for too long and have
> remained low end intermediate. ?Time to get serious. ?Pass the cheat sheets!
>
> nb



From mrmakent at cox.net  Tue May 13 15:02:13 2008
From: mrmakent at cox.net (Mike Kent)
Date: Tue, 13 May 2008 12:02:13 -0700 (PDT)
Subject: list index out of range
References: <mailman.1068.1210704380.12834.python-list@python.org>
Message-ID: <3940419e-952e-4c03-b6d9-b744acff0cc7@l42g2000hsc.googlegroups.com>

On May 13, 2:39 pm, Georgy Panterov <gpante... at yahoo.com> wrote:
>
> def deal_hand(deck):
>     HAND=[]
>     for _ in range(2):
>         i=random.randint(0,len(deck)) #produces a random card from the deck
          ^ Here i can be from 0 thru (the number of cards in the
deck).

>         HAND.append(deck[i]) # appends the card to the players' hand list
                           ^ Here you index into the deck to get a
card.  The legal indexes are 0 thru (number of cards in the deck - 1)
                             What happens if i is (the number of cards
in the deck)?

>         deck.remove(deck[i]) #removes the card from the deck
>     return HAND
>


From mail at timgolden.me.uk  Tue May  6 09:31:58 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 May 2008 14:31:58 +0100
Subject: Scanning through Windows registry...
In-Reply-To: <ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
Message-ID: <48205DCE.6020402@timgolden.me.uk>

Unknown Hero wrote:
> So basically I am looking for these things:
> 
> 1) Read one subkey from HKEY_LOCAL_MACHINE at a time (I think
> QueryValueEx() is needed here)
> 2) Check if said subkey contains some predetermined string (like 'foo'
> here)
> 3) If the above applies, change the value into another predetermined
> string (like 'moo' here)

Well, I attach a kind of explanatory Noddy example I wrote a few years ago
for someone on the python-win32 list. I think, glancing over it, that it includes
what you need to know, although not necessarily in the right order. I'm happy to 
explain if things aren't clear:

<code>
import _winreg

HKLM = _winreg.HKEY_LOCAL_MACHINE

#
# Set up a registry subtree under HKLM\Software
# which will look like this:
#

#
# TimSoft
# |
# +-- App1
# |
# +-- App2
# |
# +-- App3
#

#
# The [TimSoft] key has a default (ie unnamed) value
# while the Appx keys each have two values:
#   [Registered] - a string Y/N value
#   [Version] - a DWORD value
#

hSoftware = _winreg.OpenKey (HKLM, "Software")
hTimSoft = _winreg.CreateKey (hSoftware, "TimSoft")

_winreg.SetValueEx (hTimSoft, None, 0, _winreg.REG_SZ, "All Tim's Software")

hApp1 = _winreg.CreateKey (hTimSoft, "App1")
_winreg.SetValueEx (hApp1, "Version", 0, _winreg.REG_DWORD, 101)
_winreg.SetValueEx (hApp1, "Registered", 0, _winreg.REG_SZ, "Y")

hApp2 = _winreg.CreateKey (hTimSoft, "App2")
_winreg.SetValueEx (hApp2, "Version", 0, _winreg.REG_DWORD, 202)
_winreg.SetValueEx (hApp2, "Registered", 0, _winreg.REG_SZ, "N")

hApp3 = _winreg.CreateKey (hTimSoft, "App3")
_winreg.SetValueEx (hApp3, "Version", 0, _winreg.REG_DWORD, 303)
_winreg.SetValueEx (hApp3, "Registered", 0, _winreg.REG_SZ, "Y")

#
# NB - no need to do an explicit "write": the Registry uses
#  some sort of caching which eventually catches up with itself,
#  so unless you plan to turn the machine off soon, don't
#  bother with FlushKey or anything like that.
#

#
# Now we start again, as though we were just querying
#

hTimSoft = _winreg.OpenKey (HKLM, r"Software\TimSoft")
n_sub_keys, n_values, last_modified = _winreg.QueryInfoKey (hTimSoft)
print n_sub_keys, "sub keys", n_values, "values", last_modified, "nanoseconds since 1600!"

#
# Pick up the default value: really should try to
#  interpret the default_type to determine if it's
#  a number or a string or whatever, but...
#
default_value, default_type = _winreg.QueryValueEx (hTimSoft, None)
print "Default value:", default_value

#
# Now, in this case I know (because I created them) that
#  the TimSoft key has three subkeys, each of which has
#  two values. But if I didn't...
#
print
for i in range (n_sub_keys):
  subkey_name = _winreg.EnumKey (hTimSoft, i)
  print subkey_name

#
# Alternatively, if I hadn't done the QueryInfoKey above...
#
i = 0
print
while 1:
  try:
    subkey_name = _winreg.EnumKey (hTimSoft, i)
  except EnvironmentError:
    break
  else:
    print subkey_name
    i += 1

#
# Now, let's use the last key as an example
#  and pick out its values.
#
print
print subkey_name
hAppKey = _winreg.OpenKey (hTimSoft, subkey_name)
i = 0
while 1:
  try:
    name, value, type = _winreg.EnumValue (hAppKey, i)
    print name, value, type
  except EnvironmentError:
    break
  else:
    print "  %s => %s (type %s)" % (name, value, type)
    i += 1

</code>

TJG


From __peter__ at web.de  Thu May 15 10:30:20 2008
From: __peter__ at web.de (Peter Otten)
Date: Thu, 15 May 2008 16:30:20 +0200
Subject: Dbase / foxpro files
References: <d30b9f63-6041-4ffa-81e9-a161c0f803a8@a23g2000hsc.googlegroups.com>
Message-ID: <g0hhds$5ro$01$1@news.t-online.com>

Johny wrote:

> Is there a module for reading/modifing db files from Python?

There is a recipe by Raymond Hettinger:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

Peter


From stevegill7 at gmail.com  Wed May  7 02:40:15 2008
From: stevegill7 at gmail.com (Jetus)
Date: Tue, 6 May 2008 23:40:15 -0700 (PDT)
Subject: saving a webpage's links to the hard disk
References: <9a4733b4-5320-4a66-b0ce-5dcebc02d9a7@y38g2000hsy.googlegroups.com>
	<mailman.514.1209879217.12834.python-list@python.org>
	<7ccc9c7b-002c-4385-9832-aaa0981638da@2g2000hsn.googlegroups.com>
Message-ID: <bd585501-e330-4cfe-9bda-c2bf88296342@25g2000hsx.googlegroups.com>

On May 4, 7:22 am, castiro... at gmail.com wrote:
> On May 4, 12:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
> > En Sun, 04 May 2008 01:33:45 -0300, Jetus <stevegi... at gmail.com> escribi?:
>
> > > Is there a good place to look to see where I can find some code that
> > > will help me to save webpage's links to the local drive, after I have
> > > used urllib2 to retrieve the page?
> > > Many times I have to view these pages when I do not have access to the
> > > internet.
>
> > Don't reinvent the wheel and use wgethttp://en.wikipedia.org/wiki/Wget
>
> > --
> > Gabriel Genellina
>
> A lot of the functionality is already present.
>
> import urllib
> urllib.urlretrieve( 'http://python.org/', 'main.htm' )
> from htmllib import HTMLParser
> from formatter import NullFormatter
> parser= HTMLParser( NullFormatter( ) )
> parser.feed( open( 'main.htm' ).read( ) )
> import urlparse
> for a in parser.anchorlist:
>     print urlparse.urljoin( 'http://python.org/', a )
>
> Output snipped:
>
> ...http://python.org/psf/http://python.org/dev/http://python.org/links/http://python.org/download/releases/2.5.2http://docs.python.org/http://python.org/ftp/python/2.5.2/python-2.5.2.msi
> ...

How can I modify or add to the above code, so that the file references
are saved to specified local directories, AND the saved webpage makes
reference to the new saved files in the respective directories?
Thanks for your help in advance.


From yves at zioup.com  Sun May 11 23:40:03 2008
From: yves at zioup.com (Yves Dorfsman)
Date: Mon, 12 May 2008 03:40:03 GMT
Subject: anonymous assignment
In-Reply-To: <7xmymwuu25.fsf@ruckus.brouhaha.com>
References: <1XNVj.133805$Cj7.33096@pd7urf2no>
	<7xmymwuu25.fsf@ruckus.brouhaha.com>
Message-ID: <n_OVj.133864$Cj7.40861@pd7urf2no>

Paul Rubin wrote:
> Yves Dorfsman <yves at zioup.com> writes:
>> import time
>> y, None, d, None, None, None, None = time.localtime()
>>
>> I know you can't assign anything to None, but I'm sure you get what I
>> mean, a special keyword that means I don't care about this value.
> 
> You can just use a variable name than you ignore.  It's traditional to
> use _ but it's not a special keyword, it's just a another variable name:
> 
>    y, _, d, _, _, _, _, _, _ = time.localtime()

But you still have have a variable that's using memory for nothing. I find 
this unsatisfactory... I don't want to compare languages, but I find the 
perl "undef" elegant.


Yves.
http://www.SollerS.ca


From bruno.42.desthuilliers at websiteburo.invalid  Mon May 19 06:03:46 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Mon, 19 May 2008 12:03:46 +0200
Subject: Using Python for programming algorithms
In-Reply-To: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
References: <da4e1e14-d54b-4025-bacf-6151708856b6@w7g2000hsa.googlegroups.com>
Message-ID: <48315082$0$24599$426a74cc@news.free.fr>

Vicent Giner a ?crit :
> Hello.
> 
> I am new to Python. It seems a very interesting language to me. Its
> simplicity is very attractive.
> 
> However, it is usually said that Python is not a compiled but
> interpreted programming language

cf my answer to you and Henrique on this.


> I am working on my PhD Thesis, which is about Operations Research,
> heuristic algorithms, etc., and I am considering the possibility of
> programming all my algorithms in Python.
> 
> The usual alternative is C,  but I like Python more.

Then use it.

> The main drawbacks I see to using Python are these:
> 
> * As far as I understand, the fact that Python is not a compiled
> language makes it slower than C, when performing huge amounts of
> computations within an algorithm or program.

In which way is this a problem here ? I thought your thesis was about 
algorithm, not about implementation optimisation ? And if it's the 
later, then even C might sometimes be too high level - you should drop 
to assembly language.

> * I don't know how likely it is to find libraries in Python related to
> my research field.

I can't tell but you'd be surprised by the quantity of available Python 
libs.

> * I know Python is a "serious" and mature programming language, of
> course. But I do not know if it is seen as "just funny" in a research
> context. Is Python considered as a good programming language for
> implementing Operations Research algorithms, such as heuristics and
> other soft-computing algorithms?

Don't know if this answers your question, but it seems that at least 
some authors consider it a good choice:
http://www.oreilly.com/catalog/9780596529321/

All code examples in this books are in Python - very badly written 
Python, alas...

> Maybe this is not the right forum, but maybe you can give me some
> hints or tips...

Hem... Obviously, most people here will have a little biased, you know ?-)



From gagsl-py2 at yahoo.com.ar  Thu May 15 20:54:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 May 2008 21:54:37 -0300
Subject: Handling test data that depends on temporal data (that might
	change while the test runs)
References: <1e5bcefd0805151021i6306946dre6e54307e91d9c1c@mail.gmail.com>
Message-ID: <op.ua715bbgx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 May 2008 14:21:34 -0300, Marcelo de Moraes Serpa  
<celoserpa at gmail.com> escribi?:

> So, I have this particular method, generate_chat_dir_string, which should
> generate a string in the following format:
>  "md5hexstring-day-month-year-hour-minute"
> This string will be used to create a directory in the filesystem.

There is an issue here - how much behavior is considered in the public  
interfase, and how much is just an implementation detail. You only have to  
test the public interfase, what the method promises to do, NOT any  
internal implementation details.

I don't think that the md5 string be part of the interfase - probably it's  
enough to promise different directory names for different combinations of  
"user" and "atendente". A separate question: do we promise to generate the  
same directory name for the same set of user/atendente, or not? (assuming  
the time part is constant).
For the time part - is that format *required*, or just a means to obtain  
separate directory names, even for the same set of users, based on time?
Or perhaps we *only* want to guarantee different results for different  
function calls, and ALL that stuff involving users and time are just  
implementation details?
Depending on how you answer those questions, you write tests in a way or  
another way.

> I'm trying to adopt the TDD approach, so, I'm starting by testing all the
> methods of the Chat class, including this one. However, an issue just  
> popped
> up, this is the test code:
>
>
>    1.   def test_generate_chat_dir_string(self):
>    2.         import md5
>    3.         import random
>    4.         import datetime
>    5.         md5_handler = md5.new()
>    6.         users = [{"user":"pedro","atendente":False},{
>    "user":"jo?o","atendente":True}]
>    7.         #salt = random.random().to_s()
>    8.         #md5_handler.update(salt)
>    9.         now = datetime.datetime.now()
>    10.         ts = now.strftime("%d-%m-%Y-%H-%M")
>    11.         for user in users:
>    12.             md5_handler.update(user["user"])
>    13.
>    14.
>    15.         seed = md5_handler.hexdigest()
>    16.
>    17.         final_string = seed + "-" + ts
>    18.
>    19.         method_generated_string =  
> self.chat.generated_chat_dir_string
>    (users,seed)
>    20.
>    21.         self.assertEquals(final_string,method_generated_string)

Looks like you have just copied the generated_chat_dir_string  
implementation here - that's not the point of testing, at least if you  
relax the restrictions as I said above.

Supose the specification says, instead: the resulting directory must  
differ whether the set of users/atendente differs, or the request time is  
separated more than 1 minute apart.

Then the tests should cover:
- build a set of users and choose a point in time
- generate dir1 with that set of users and that time
- modify the set of users, generate dir2 and assert that it differs from  
dir1
   Repeat other modifications, including:
     one more user
     one less user
     same users, changing "atendente" for some
     only one user
     empty set of users (if it should raise an exception, check that it's  
actually raised)
     what happens when only the *order* of users is changed? (why is it a  
list instead of a set?)
     other conditions that might fail, perhaps based on your knowledge of  
the implementation (it's ok to test special cases that are special only  
because of how it is implemented, as far as you only test what is required  
by the specification). By example, suppose the md5 function is absolutely  
dumb and only accepts strings at most 32 characters long; test with a  
username longer than that.

- Then, increment the time less than a minute and verify you *can*  
generate dir3 (our specification doesn't *require* it to be the same, so  
don't check more than required)
- increment the time more than a minute, generate another dir and verify  
it's different.

Notice that, to be able to make all those tests involving the *same* time  
we should process them very quickly so the minute part doesn't change (but  
it even might fail when we're near the minute end). Worse, the last test  
woul require to *wait* more than one minute to see the change...
That's horrible - so we write the function in a way that *helps* testing.  
By example, adding another argument: the time to be used, which defaults  
to None meaning the current time.

def generated_chat_dir_string(self, users, curtime=None):
     if curtime is None: curtime = time.time()
     ...

(usually curtime is unused, but we do use it for testing)

I hope it's more clear now how to define your tests.

-- 
Gabriel Genellina



From sbour at niaid.nih.gov  Fri May 30 19:40:39 2008
From: sbour at niaid.nih.gov (Stephan Bour)
Date: Fri, 30 May 2008 16:40:39 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
Message-ID: <Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>

Lew wrote:
} John Thingstad wrote:
} > Perl is solidly based in the UNIX world on awk, sed, bash and C.
} > I don't like the style, but many do.
}
} Please exclude the Java newsgroups from this discussion.

Did it ever occur to you that you don't speak for entire news groups?


Stephan. 




From salmoni at gmail.com  Thu May 15 00:08:45 2008
From: salmoni at gmail.com (Alan J. Salmoni)
Date: Wed, 14 May 2008 21:08:45 -0700 (PDT)
Subject: Running an interactive interpreter inside a python
References: <wihy76c2qh3.fsf@panix5.panix.com>
Message-ID: <d3cbc68d-6eee-4db9-8702-13a3d08e7702@q27g2000prf.googlegroups.com>

I'm not sure if this is exactly what you're after, but try looking
into the 'code' module.

It's fairly easy to make an interactive interpreter that runs within
your program. If you import your programs variables into
__main__.__dict__, you can have access to them which can be funky. You
can even override the showtraceback method to catch various exceptions
and do daft things like adding new methods to strings. I guess it
would even be possible to have the commands compared to a list of
commands and keywords to build a restricted interpreter, though how
secure this would be against a determined attack is another matter.

Alan

On May 15, 11:31 am, ro... at panix.com (R. Bernstein) wrote:
> The next release of pydb will have the ability to go into ipython from
> inside the debugger. Sort of like how in ruby-debug you can go into
> irb :-)
>
> For ipython, this can be done pretty simply; there is an IPShellEmbed
> method which returns something you can call. But how could one do the
> same for the stock python interactive shell?
>
> To take this out of the realm of debugging. What you want to do is to
> write a python program that goes into the python interactive shell -
> without having to write your own a read/eval loop and deal with
> readline, continuation lines, etc.
>
> The solution should also allow
>  - variables/methods in the calling PYthon program to be visible
>    in the shell
>  - variables set in the interactive (sub) shell should persist after the shell
>    terminates, although this is a weaker requirement. POSIX subshells
>    for example *don't* work this way.
>
> There has been much written about how to embed Python from C, so I
> suppose this may offer one way. And at worst, I could write
> a C extension which follows how C Python does this for itself.
>
> But is there a simpler way?
>
> Thanks.



From gagsl-py2 at yahoo.com.ar  Fri May  9 02:22:37 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 May 2008 03:22:37 -0300
Subject: python newbie: some surprises
References: <67b60370-bed9-4f43-b401-25ce2fd89522@t54g2000hsg.googlegroups.com>
	<64fb7f0f-c8fa-4324-8a13-f4e99082c470@p25g2000hsf.googlegroups.com>
	<VHQUj.124646$Cj7.90968@pd7urf2no>
Message-ID: <op.uavinzs4x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 May 2008 01:47:49 -0300, Yves Dorfsman <yves at zioup.com>  
escribi?:

> I see the point of the OP. Couldn't the new-line be used as an  
> equivalent of   ':', for example, do you find this difficult to read:
>
> if a == 3
>    do_something()
>
>
> if a == 3: do_something()
>
>
> And surely, it should be easy to parse by the compiler.

Yes, it could be done, there are no technical reasons to always force to  
use ":". But AFAIK the main reasons to keep ":" are internal consistency  
(an inner block always starts with ":"; incidentally, that's easier to  
handle for editors) and legibility (the ":" stands for itself and has a  
meaning)

-- 
Gabriel Genellina



From vivainio at gmail.com  Wed May 21 02:05:36 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Wed, 21 May 2008 06:05:36 GMT
Subject: feature proposal, debug on exception
References: <7xtzgsqxpg.fsf_-_@ruckus.brouhaha.com>
	<e530ee93-ab63-4d2a-a52f-0d8ff4895af8@a32g2000prf.googlegroups.com>
Message-ID: <zlqkkx92.fsf@gmail.com>

Simon Forman <sajmikins at gmail.com> writes:

> This is not exactly an answer to your proposal, I know, but FWIW
> Ipython has exactly this capability.

Yes.

When you %run a scripts and get exception, you can launch post-mortem
pdb on it by typing %debug.


From arnodel at googlemail.com  Tue May 13 16:49:42 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 13 May 2008 21:49:42 +0100
Subject: help with file path exceeding 255 characters
References: <411ca062-faa9-4635-8d69-90e69f465729@z72g2000hsb.googlegroups.com>
Message-ID: <m263tiapzt.fsf@googlemail.com>

yguan08 at gmail.com writes:

> I have trouble of obtaining the file size of a file because the
> fullpath exceeds 255 characters. I get this message with
> os.path.getsize(fullpath).
>
> fullpath = r"\\LOSSSFS002\NWE_TECHNICAL\05. UK\Schiehallion (204_25a)
> \Amos&Burke_P559\07. Technical (Subsurface)\06. Well Planning\Amos
> \Daily Reports\Wireline\final_204_25a_8z\204_25a_8z\Run_1A
> \HRLA_SP_DSI_PEX_HNGS_ECRD\ANCILLARY\Amos_204_25a-8Z_GR_to_surface_3-
> Mar-2008_DSI_HRLA_TLD_MCFL_047PUC.las"
>
> fsize = os.path.getsize(fullpath)
>
>
> WindowsError: [Error 206] The filename or extension is too long:
>
> The same thing with os.stat(fullpath).
>
> I tried using the relative path, but it does not work with the message
> fname not found.
>
> dir = os.path.dirname(fullpath)
> fname = os.path.basename(fullpath)
> os.chdir(dir)
> filesize = os.path.getsize(fname)
>
> Is there a walk around of this?

Disclaimer: I am not a Windows user

Might this help?  http://forum.altap.cz/viewtopic.php?p=2353

Alternately, use a better OS :-)

-- 
Arnaud


From alangrow at gmail.com  Sat May 17 16:31:18 2008
From: alangrow at gmail.com (alan)
Date: Sat, 17 May 2008 13:31:18 -0700 (PDT)
Subject: waiting on an event blocks all signals
References: <mailman.1283.1211054805.12834.python-list@python.org>
Message-ID: <a0dae4f6-090b-4990-b870-56b01652d7c0@m3g2000hsc.googlegroups.com>

On May 17, 3:06 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Sat, 17 May 2008 12:49:54 -0700, John Schroeder <jschr... at gmail.com> wrote:
> >On Sat, May 17, 2008 at 12:32 PM, alan <alang... at gmail.com> wrote:
>
> >> This ignores CTRL-C on every platform I've tested:
>
> >> python -c "import threading; threading.Event().wait()"
> >> ^C^C^C^C
>
> >> It looks to me like all signals are masked before entering wait(). Can
> >> someone familiar with the internals explain and/or justify this
> >> behavior? Thanks,
>
> >^C only kills the main thread.  Use Control-Break to kill all threads.
>
> Look at that program.  It's single-threaded.  Where do you think the ^C
> is going? :)
>
> Jean-Paul

Look at this program which is also "single-threaded." Clearly,
python's doing something special. I'm hoping someone can tell me what,
and why.

/*
  pthreadsig.c

  $ gcc pthreadsig.c -lpthread
  $ ./a.out
  ^C
  $
*/

#include <pthread.h>

int main(int argc, char** argv) {
  int rc = 0;

  pthread_mutex_t mtx;
  pthread_cond_t cond;
  pthread_mutex_init(&mtx, 0);
  pthread_cond_init(&cond, 0);

  pthread_mutex_lock(&mtx);
  rc = pthread_cond_wait(&cond, &mtx);
  pthread_mutex_unlock(&mtx);

  return rc;
}


From martin at v.loewis.de  Sun May 18 02:34:47 2008
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 18 May 2008 08:34:47 +0200
Subject: help compiling Python on vs 2008!
In-Reply-To: <U8OXj.6920$255.269@bignews8.bellsouth.net>
References: <R_rXj.46933$3v1.13528@bignews3.bellsouth.net>	<mailman.1270.1211029209.12834.python-list@python.org>	<QZFXj.6721$255.5738@bignews8.bellsouth.net><e76aa17f0805171226q42376990j96c0f71477d87cbc@mail.gmail.com>
	<mailman.1287.1211058342.12834.python-list@python.org>
	<U8OXj.6920$255.269@bignews8.bellsouth.net>
Message-ID: <482FCE07.5020305@v.loewis.de>

> VS2005 seems to be officially supported.

That impression is incorrect. There is the PCbuild8 directory, but
it isn't maintained or tested in a systematic way. Users of it may
need to adjust it before it can do something useful.

Regards,
Martin


From mnikhil at gmail.com  Wed May 21 19:15:19 2008
From: mnikhil at gmail.com (Nikhil)
Date: Thu, 22 May 2008 04:45:19 +0530
Subject: simple way to touch a file if it does not exist
Message-ID: <g12aee$jss$1@registered.motzarella.org>

what are the simple ways?
I could think of os.open(), os.exec(touch file)

are there any simpler methods?


From wxPythoner at gmail.com  Tue May 13 18:08:26 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 15:08:26 -0700 (PDT)
Subject: What is  self.file = file  for?
Message-ID: <cac86657-0943-44d8-997b-5c5900491889@e39g2000hsf.googlegroups.com>

Hello!

I have trouble understanding something in this code snippet:

class TextReader:
    """Print and number lines in a text file."""
    def __init__(self, file):
        self.file = file
        .
        .
        .


When would you do a thing like  self.file = file  ? I really don't
find an answer on this. Please help me understand this.


From foul_ole_ron1 at yahoo.com  Fri May 23 04:45:08 2008
From: foul_ole_ron1 at yahoo.com (Marc Oldenhof)
Date: Fri, 23 May 2008 01:45:08 -0700 (PDT)
Subject: error using all()/numpy [TypeError: cannot perform reduce with 
	flexible type]
References: <bc48abbf-43df-413c-85da-3bd8598ad92c@w7g2000hsa.googlegroups.com>
Message-ID: <a8b6eaf4-fe73-46fa-b465-3e7ed34418e7@m73g2000hsh.googlegroups.com>

On 23 mei, 09:12, Marc Oldenhof <foul_ole_r... at yahoo.com> wrote:
<snip my post>

Thanks for the reactions, I'll use the "from numpy import <individual
stuff>" from now on :)

Marc


From roy at panix.com  Sat May 24 09:44:22 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:44:22 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
Message-ID: <roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>

In article 
<af66b0d4-f77d-4d54-8ee0-94592497d2f2 at l64g2000hse.googlegroups.com>,
 Fuzzyman <fuzzyman at gmail.com> wrote:

> Also, like others, I have had wonderful experiences of trying to track
> down test failures that depend on the order that tests run in. Having
> interdependencies between tests is a recipe for madness...

I agree that tests should not depend on each other, but sometimes it's 
still useful to have the tests run in a certain order for reporting 
purposes.

If you're doing requirements tracking, it's nice to have the tests execute 
in the same order as the requirements are listed.  It makes interpreting 
the output easier.  Sure, you could give the test cases names like 
"test_fr17.3a" and write your own getTestCaseNames(), but just putting them 
into the file in the order you want them to run is easier.  And making 
things easy is what this is all about.


From brian.darkblueb at gmail.com  Sat May  3 20:01:44 2008
From: brian.darkblueb at gmail.com (darkblueB)
Date: Sat, 3 May 2008 17:01:44 -0700 (PDT)
Subject: PIL JPEG mis-step
References: <3e422e1b-5720-4bbd-a707-d6be51f06532@u12g2000prd.googlegroups.com>
	<fvitsq$15ti$3@news.mtu.ru>
Message-ID: <d2dca1d3-9a41-4862-a695-ba2fbf93e6a6@h1g2000prh.googlegroups.com>

On May 3, 4:52?pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> Try run 'python setup.py build_ext -f' to force setup.py to rebuild
> everything with JPEG. And 'sudo python setup.py install' should install
> PIL with JPEG support.

yes, that works

(the self test still gives misleading results ?)
but running some sample program works fine

thanks


From __peter__ at web.de  Tue May 13 04:55:44 2008
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 May 2008 10:55:44 +0200
Subject: Sparse Matrix Multiplications
References: <bbd9be9a-55cc-426d-bccd-8f58ddda961d@m36g2000hse.googlegroups.com>
Message-ID: <g0bl2e$ft9$00$2@news.t-online.com>

dingo_1980 at yahoo.com wrote:

> I was trying to create a sparse matrix using scipy.sparse (100000 X
> 100000) with just the first row and first column filled with ones.
> Lets call this matrix Asp. This is how I created Asp
> 
> from scipy import sparse
> Asp = scipy.lil_matrix(100000,100000)
> for i in range(100000):
>    Asp[i,0] = i
>    Asp[0,i] = i
> Bsp = (Asp.tocsr())*(Asp.tocsr())
> 
> This multiplication to get Bsp is taking a long time (to the order of
> over an hour). Is there some other way of storing such huge sparse
> matrices and doing their multiplications or is this the most optimal
> way?

I think sparse matrices don't help here because the result isn't sparse.
Looking at your example I think you can see that B[i,k] == A[i,0]*A[0,k] for
i,k != 0,0, so for a matrix of that structure you might get away with
something like

# use at your own risk
import numpy

N = 10**4 # I get a MemoryError for a bigger exponent
b = numpy.array(range(N))
a = numpy.zeros((N, N)) + b
a *= a.transpose()
a[0,0] = (b*b).sum()
print a

But for expert advice you better ask on the numpy mailing list...

Peter


From mensanator at aol.com  Tue May 20 15:45:29 2008
From: mensanator at aol.com (Mensanator)
Date: Tue, 20 May 2008 12:45:29 -0700 (PDT)
Subject: List of disk drives on Windows?
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <aab2249a-55ad-4428-b111-60acaecd5515@p39g2000prm.googlegroups.com>

On May 20, 2:18?pm, Bob Greschke <b... at passcal.nmt.edu> wrote:
> This MUST have been asked before, but I can't seem to Google the right
> thing. ?How can I get a list of drives on a Windows box, like ["C:\",
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?
>
> Thanks!
>
> Bob

>>> import os.path

>>> dl = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> drives = ['%s:' % d for d in dl if os.path.exists('%s:' % d)]
>>> drives
['C:', 'D:', 'F:', 'G:', 'H:', 'I:', 'J:', 'M:', 'N:', 'O:', 'P:',
'Q:', 'R:', 'S:', 'T:', 'U:', 'X:', 'Y:']



From gagsl-py2 at yahoo.com.ar  Sat May 10 20:47:10 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 May 2008 21:47:10 -0300
Subject: multiple Python versions,
	but on Windows (how to handle registry updates)
References: <3de8e1f70805090358p27796919jb885138406ade6aa@mail.gmail.com>
	<op.uav4dutjx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<g02ale$lnj$1@ger.gmane.org>
	<3de8e1f70805092138y4ca414ck2be6b5246afa664b@mail.gmail.com>
Message-ID: <op.uaysgwzxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 10 May 2008 01:38:24 -0300, Banibrata Dutta <banibrata.dutta at gmail.com> escribi?:

> given that I already have Python2.5 installed & will install Python2.4, will
> copying the ../Lib/site-packages/ from 2.5 into 2.4's, work ?
> i think the answer is "no", but still asking. is it package specific ?
>
> does it matter if the packages were egg drops ?

Packages containing only .py modules ("pure" packages) are OK; packages using C extensions (.dll, .pyd) have to be rebuilt (or you have to download the binaries for the other Python version).

-- 
Gabriel Genellina



From s0suk3 at gmail.com  Thu May 22 08:29:20 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 05:29:20 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<FzKYj.152636$rd2.107869@pd7urf3no>
	<a95c09d9-94c3-4dac-9439-9176038d93d9@w8g2000prd.googlegroups.com>
Message-ID: <c745c74c-21a4-42ed-a651-e4b6d9878134@34g2000hsf.googlegroups.com>

On May 21, 10:34 am, Dave Parker <davepar... at flamingthunder.com>
wrote:
> On May 20, 7:05 pm, Collin <collinye... at shaw.ca> wrote:
>
> > Personally, FT is a bit meh to me. The way you issue your statements I
> > always think something is wrong, mainly because when I want to define,
> > say, x, in python I'd go:
>
> > x = "whatever"
>
> > Instantly noting that I defined x. While in Flaming Thunder I'd have to
> > type:
>
> > Set x to "whatever"
>
> > It just feels wrong.
>
> Actually, it felt wrong to me when I first started working on Flaming
> Thunder because I've been programming for decades and have had all of
> the programming idioms burned into my brain.
>
> But after getting input from children and teachers, etc, it started
> feeling right.
>
> For example, consider the two statements:
>
>      x = 8
>      x = 10
>
> The reaction from most math teachers (and kids) was "one of those is
> wrong because x can't equal 2 different things at the same time".

So it seems like you're designing a language for non-programmers.
That's good, I've never heard about anyone so interested in teaching
programming for kids and non-programmers. But in that case, you
shouldn't even be comparing it to Python.

> Many computer languages conflate "equality" with "assignment" and then
> go to even more confusing measures to disambiguate them (such as using
> == for equality, or := for assignment).

That stops being confusing after a few weeks of programming.
(Actually, IMO, it's not confusing, but it's tricky because sometimes
it's a hard typo to find. Though that will only be a syntax error in
Python.) But again, that'll be great for the kids! ;-)

> Plus, symbols are more confusing for people to learn about than
> words.  There are lots of people who are fluent in English, but
> dislike math.

Learning the symbols of a programming language is one of the first and
minimum requirements to learning any particular programming language--
we call that the "syntax" of the language.

> So, I opted for a simple, unambiguous, non-mathematical way of
> expressing "assignment" which makes sense even to the non-
> mathematically inclined:

>      Set x to 8.

> That way, = can be reserved unambiguously and unconfusingly for the
> mathematical notion of "equality" -- because it's in their math
> classes that people learn what = means:

> Set QuadraticEquation to a*x^2 + b*x + c = 0.

So it seems that you got a great language for math teachers, non-
mathematicians, non-programmers, and kids! (what a great arsenal of
people...). Maybe if I have a kid someday I'll teach him Flaming
Thunder! (just kidding, you prick).


From bearophileHUGS at lycos.com  Sat May 17 16:05:54 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Sat, 17 May 2008 13:05:54 -0700 (PDT)
Subject: Markov Analysis Help
References: <g0lobb$1lu$1@news.xmission.com>
	<0e19f5d0-9898-48c0-9192-683c74dc7fad@c65g2000hsa.googlegroups.com>
	<g0mvc2$sic$1@news.xmission.com>
Message-ID: <64b58740-b778-4b8f-b810-b4bf8cf1b4ed@c65g2000hsa.googlegroups.com>

dave:
>Can you have doctests on random functions?

Yes, you can add doctests to methods, functions, classes, module
docstrings, and in external text files.

Bye,
bearophile


From Sumon.Sadhu at gmail.com  Thu May  8 15:21:07 2008
From: Sumon.Sadhu at gmail.com (sharpshoot)
Date: Thu, 8 May 2008 12:21:07 -0700 (PDT)
Subject: Write a python blog/website?
Message-ID: <08d22e33-667e-4089-a777-69d5cb9cb95b@59g2000hsb.googlegroups.com>

Hi Guys,

I thought this would be really interesting to people who blog who
might be able to help us. This year we built a product called
Snaptalent, emanating from Paul Graham's Y Combinator, which allows
bloggers to monetize using tasteful and relevant job advertising.

When we found out Joel Spolsky makes over $200k a year from Job
Advertising, we decided to do something about helping publishers who
write great content, who don't make a lot of money to make money from
relevant job ads as opposed to some of the irrelevance shown by
adsense.

We also decided that in addition making the jobs ads solely text based
that we would allow for tasteful widget formats with images (to show
off cool offices), video (to show off the people). Also we decided to
make pretty widgets, which when clicked upon, showed a full page job
ad in a lightbox thus not taking users away from the page.

Also for a lot of audiences job ads would be more relevant and that
great job ads are also great content (like the job ads in the
economist).

Things have gone really well and since March, this year we've worked
with a test group of about 45 sites and 30 or so companies to really
get this right. Now we're ready to add a 100 more sites for the next
phase to improve what we've done, so we need your help to get us
there!

You can see our widgets some high profile sites like

Hacker News: http://news.ycombinator.com/jobs
Steve Yegge: http://steve-yegge.blogspot.com
Raganwald: http://weblog.raganwald.com

and we've attracted some great initial reviews:

http://paulstamatiou.com/2008/03/15/snaptalent-compelling-job-ads
http://www.pchristensen.com/blog/articles/tasteful-monetization-and-the-passionate-developer-community/

We're keen to continue growing the network again and are planning to
restrict this to another 100 blogs for the next phase.

I would love to extend out an invitation to folk who

*  Write good quality content
* Update regularly and have some traffic

If you'd like to participate the URL to get a widget here:
http://snaptalent.com/widgets/new

Now the rates may not be as high as they will be in the future, and
there may be stuff we need to fix, but together with your feedback we
can iterate on what we've done & make something thats really valuable
for the programming community.

Please feel free to forward this to someone who you know may benefit
or if you have any questions, don't hesitate to contact me.

Thanks in advance for your help!

Sumon

Co-founder
Snaptalent
sumon at snaptalent.com


From deets at nospam.web.de  Sun May 25 07:28:19 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 25 May 2008 13:28:19 +0200
Subject: unittest: Calling tests in liner number order
In-Reply-To: <roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <69t0qlF356llmU1@mid.uni-berlin.de>

Roy Smith schrieb:
> In article 
> <af66b0d4-f77d-4d54-8ee0-94592497d2f2 at l64g2000hse.googlegroups.com>,
>  Fuzzyman <fuzzyman at gmail.com> wrote:
> 
>> Also, like others, I have had wonderful experiences of trying to track
>> down test failures that depend on the order that tests run in. Having
>> interdependencies between tests is a recipe for madness...
> 
> I agree that tests should not depend on each other, but sometimes it's 
> still useful to have the tests run in a certain order for reporting 
> purposes.

Then sort your report. Seriously. A test-outpt shoud be in a way that 
delimits individual testresults in a way that makes them easily 
extractable. Then if you want them to be ordered for e.g. diff'ing - 
sort them.

Diez


From cashm491 at gmail.com  Fri May 23 10:11:34 2008
From: cashm491 at gmail.com (cashm491 at gmail.com)
Date: Fri, 23 May 2008 07:11:34 -0700 (PDT)
Subject: Genuine Lifetime Income!! Earn!! = 10,000 US Dollars per month 
	without Investmen
Message-ID: <05c8be6c-37c4-46b1-b3ee-2e5f38386d34@y18g2000pre.googlegroups.com>

You Have Finally Found It Genuine Lifetime Income!!
Earn!! ? 10,000 US Dollars per month without Investment
http://seniorfriendfinder.com/go/g970599-pmem
Earn!! ? 10,000 US Dollars per month without Investment
By working only one hour per day from the cyber caf? or PC


From victorsubervi at gmail.com  Tue May 13 10:51:15 2008
From: victorsubervi at gmail.com (Victor Subervi)
Date: Tue, 13 May 2008 09:51:15 -0500
Subject: Custom Classes?
In-Reply-To: <op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
	<op.uavhfyo3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <4dc0cfea0805130751h30e264a0j3e5d2097eba3918e@mail.gmail.com>

On 5/9/08, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Thu, 08 May 2008 12:33:55 -0300, Victor Subervi <
> victorsubervi at gmail.com> escribi?:
>
> Okay, trying this again with everything working and no ValueError or any
> > other errors, here we go:
> >
>
> getpic = "getpic" + str(w) + ".py"
> >
>
> Why do you *generate* the getpicNN.py? It contains always the same code,
> why don't you just use a single getpic.py?
>
> and then surf to:
> > http://whatever.url/getpic20.py?id=6&x=1
>
>
Because I initially could not get it to work that way...and then I forgot
about it. But you are right. That is what I need to do. So I will work on
that.

Uhm, I don't think there is something specific for this list. There is an
> article from E.S.Raymond "How to ask questions the smart way?" that you can
> find with Google


Thanks. Got it.
Victor
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From tjreedy at udel.edu  Thu May  8 17:09:11 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 May 2008 17:09:11 -0400
Subject: Feature suggestion: sum() ought to use a compensated
	summationalgorithm
References: <fvi54o$26lb$1@toralf.uib.no>	<Xns9A94ACAB89668duncanbooth@127.0.0.1><mailman.564.1209946487.12834.python-list@python.org>
	<fvmdg1$1e4p$1@toralf.uib.no>
Message-ID: <fvvq5m$5sq$1@ger.gmane.org>


"Szabolcs Horv?t" <szhorvat at gmail.com> wrote in message 
news:fvmdg1$1e4p$1 at toralf.uib.no...
| Gabriel Genellina wrote:
| >
| > Python doesn't require __add__ to be associative, so this should not be 
used as a general sum replacement.
|
| It does not _require_ this, but using an __add__ that is not commutative
| and associative, or has side effects, would qualify as a serious misuse,

seq + seq is not commutative ;-) 





From pavlovevidence at gmail.com  Thu May  1 14:56:20 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 1 May 2008 11:56:20 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru> 
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
Message-ID: <52a268cc-dae7-4eda-81df-cc82dbcbdcd7@56g2000hsm.googlegroups.com>

On May 1, 1:30 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Thu, 01 May 2008 09:45:28 -0700, Carl Banks wrote:
> > On May 1, 12:11 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> >> On 2008-05-01, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
>
> >> > IMO .ini-like config files are from the stone age. The modern
> >> > approach is to use YAML (http://www.yaml.org).
>
> >> You mean YAML isn't a joke!? It's so ludicrously overcomplicated, and
> >> so comprehensively and completely fails to achieve its stated main goal
> >> of being "readable by humans", that I had assumed it was an April Fool
> >> along the lines of Intercal or brainf***.
>
> > YAML, ISTM, took a simple concept that worked for small, straightforward
> > data, and tried to make into a format that could anything anywhere, with
> > disastrous results.  It's not unlike Perl in this regard.  It's quite
> > ridiculous.
>
> > My recommendation to the OP would be:
>
> > If you intend to write a GUI that completely sets all the options, use
> > XML.  You can bet there are some users who would prefer text editing
> > options files, and XML, while not the most readable format available, at
> > least gives users the option.
>
> > If you don't intend to write a GUI to do that, write a simple text file
> > parser (if the options are simple), use ConfigParser, or use a Python
> > file that you exec.
>
> > Store the file in $HOME/.appname/config.ext on Unix, $USERDIR/
> > ApplicationData/Appname/config.ext on Windows.  I don't recommend using
> > the Windows registry to store options; use it to modify Windows behavior
> > (like file associations) but keep your own program's options in your own
> > file.
>
> If you don't like YAML, use JSON or something similar -- XML is overkill
> and .INI is too limited.


I don't think you know the OP's requirements enough to know whether
INI or XML is suitable. You're welcome to suggest alternatives but
what I suggested is fine.

As for XML being overkill for anything, I highly disagree. XML is
suitable for the smallest tasks.  These days I use XML for almost all
my data exchange needs: including conf files.  Elementtree makes it
possible to process XML and pull out some typical data in ten or so
lines of code.  What could possibly be overkill about that?


Carl Banks


From jharry at EmeryWeiner.org  Thu May  1 20:21:08 2008
From: jharry at EmeryWeiner.org (Jordan Harry)
Date: Thu, 1 May 2008 19:21:08 -0500
Subject: TypeError: unsupported operand type(s) for /: 'NoneType' and
	'NoneType'
Message-ID: <EDD39CB66D855D488AA9140DABFF161503779D@Hermes.EmeryWeiner.org>

I'm trying to write a simple program to calculate permutations.  I created a file called "mod.py" and put the following in it:
 
def factorial(n):
    a = n
    b = n
    while a>0 and b>1:
        n = (n)*(b-1)
        b = b-1
 
def perm(n, r):
    a = factorial(n)
    b = factorial(n-r)
    q = a / b
    print q

Then I went back to IDLE and input the following:
 
>>> import mod
>>> mod.perm(5, 4)
 
I recieved the following error message:
 
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    mod.perm(5, 4)
  File "C:\Python25\mod.py", line 27, in perm
    q = a / b
TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'
 
I have no idea how to fix it.  I'm pretty new to Python.  I have IDLE 1.2.2 and Python 2.5.2,
 
Please help.


From matiassurdi at gmail.com  Sat May 10 12:40:25 2008
From: matiassurdi at gmail.com (Matias Surdi)
Date: Sat, 10 May 2008 18:40:25 +0200
Subject: Now what!?
In-Reply-To: <68m0i1F2t8265U1@mid.uni-berlin.de>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
	<68m0i1F2t8265U1@mid.uni-berlin.de>
Message-ID: <g04j5p$suo$1@ger.gmane.org>

Diez B. Roggisch escribi?:
> notbob schrieb:
>> Grrr....
>>
>> I'm following A Byte of Python and into the while loops chap.  I cp/paste
>> while.py to a file and give 777 perms.  I mv while.py to while and run 
>> it (./while)
>> as a standalone script.  I get errors.
>>
>> Here is the script:
>>
>> while.py
>>
>> http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html
>>
>>
>> When I run it as.....
>>
>> $ python while
>>
>> .....it works perfect.  But, if I run it simply as.....
>>
>> $ ./while
>>
>> .....I get this:
>>
>> $ ./while
>> number: illegal number: =
>> ./while: line 6: running: command not found
>> ./while: line 9: syntax error near unexpected token ('
>> ./while: line 9:         guess = int(raw_input('Enter an integer : '))'
>>
>> Why does it work one way and not the other.  If I run the simple hello 
>> world
>> script the same way ($ ./helloworld) and it works fine.  Same shebang, 
>> same
>> dir, same permission, etc.  I even meticulously indented everything
>> perfectly by hand.  What am I missing?
> 
> I'm pretty sure you misse the correct shebang - the shell tries to 
> execute your script as shell-script, instead of invoking the interpreter.
> 
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

Add #!/path/to/bin/python on the first line of your script.

Also should work with:
#!/usr/bin/env python




From deets at nospam.web.de  Sat May 10 12:24:24 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 10 May 2008 18:24:24 +0200
Subject: Now what!?
In-Reply-To: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
References: <bWjVj.39830$ye3.34175@fe119.usenetserver.com>
Message-ID: <68m0i1F2t8265U1@mid.uni-berlin.de>

notbob schrieb:
> Grrr....
> 
> I'm following A Byte of Python and into the while loops chap.  I cp/paste
> while.py to a file and give 777 perms.  I mv while.py to while and run it (./while)
> as a standalone script.  I get errors.
> 
> Here is the script:
> 
> while.py
> 
> http://www.ibiblio.org/swaroopch/byteofpython/read/while-statement.html
> 
> 
> When I run it as.....
> 
> $ python while
> 
> .....it works perfect.  But, if I run it simply as.....
> 
> $ ./while
> 
> .....I get this:
> 
> $ ./while
> number: illegal number: =
> ./while: line 6: running: command not found
> ./while: line 9: syntax error near unexpected token ('
> ./while: line 9:         guess = int(raw_input('Enter an integer : '))'
> 
> Why does it work one way and not the other.  If I run the simple hello world
> script the same way ($ ./helloworld) and it works fine.  Same shebang, same
> dir, same permission, etc.  I even meticulously indented everything
> perfectly by hand.  What am I missing?

I'm pretty sure you misse the correct shebang - the shell tries to 
execute your script as shell-script, instead of invoking the interpreter.

Diez


From dickinsm at gmail.com  Wed May 21 14:38:35 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Wed, 21 May 2008 11:38:35 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
Message-ID: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>

On SuSE 10.2/Xeon there seems to be a rounding bug for
floating-point addition:

dickinsm at weyl:~> python
Python 2.5 (r25:51908, May 25 2007, 16:14:04)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = 1e16-2.
>>> a
9999999999999998.0
>>> a+0.999     # gives expected result
9999999999999998.0
>>> a+0.9999   # doesn't round correctly.
10000000000000000.0

The last result here should be 9999999999999998.0,
not 10000000000000000.0.  Is anyone else seeing this
bug, or is it just a quirk of my system?

Mark


From castironpi at gmail.com  Fri May 16 10:59:41 2008
From: castironpi at gmail.com (castironpi)
Date: Fri, 16 May 2008 07:59:41 -0700 (PDT)
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
	<482d7cc6$0$10756$426a34cc@news.free.fr>
	<c3a3d030-b5a1-43f3-bded-f492f2110bde@k13g2000hse.googlegroups.com>
	<57aa79de-8e01-44bc-90d3-cfd6b7e9bf3f@x35g2000hsb.googlegroups.com> 
	<52d91619-d8bf-47cb-8a69-5604f71dc45c@e39g2000hsf.googlegroups.com>
Message-ID: <edfcb71d-dfce-45b7-8cfe-1bae9f685e03@b64g2000hsa.googlegroups.com>

On May 16, 9:10?am, castironpi <castiro... at gmail.com> wrote:
> On May 16, 8:35?am, castironpi <castiro... at gmail.com> wrote:
>
>
>
>
>
> > On May 16, 8:18?am, castironpi <castiro... at gmail.com> wrote:
>
> > > On May 16, 7:23?am, Bruno Desthuilliers <bruno.
>
> > > 42.desthuilli... at websiteburo.invalid> wrote:
> > > > Kay Schluehr a ?crit :
>
> > > > > On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> > > > >> Hello all,
>
> > > > >> Yesterday we found the cause of a bug that has caused problems for a long time.
> > > > >> It appeared to be the following:
>
> > > > >> class A(object):
> > > > >> ? ? pass
>
> > > > >> print min(1.0, A())
>
> > > > >> which is accepted by Python even though the A() object is not numerical in
> > > > >> nature.
>
> > > > >> The cause of this behavior seems to be the compare operation of the object
> > > > >> class.
>
> > > > >> Is there a way to disable this behavior in Python (other than deriving a new
> > > > >> 'object-like' class that doesn't do comparisons?)
>
> > > > > Are you sure you don't want to use a statically typed language that
> > > > > captures all type errors just by inspecting your source code?
>
> > > > This is not necessarily a static vs dynamic typing problem. The
> > > > following code will raise a TypeError for very good reasons:
>
> > > > ? ? print 1.0 + A()- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > I question the real-world examples of coercion, casting, and
> > > upcasting. ?C insists that defining by operator, which may or may not
> > > relate to system, is the only legal move. ?I doubt operator+ is well-
> > > defined on non-ideal structures. ?Rationals are not floats, but system
> > > got checked. ?Define concurrency.- Hide quoted text -
>
> > > - Show quoted text -
>
> > I would be bouncing localcy and remoticy. ?What word's on the bar?- Hide quoted text -
>
> > - Show quoted text -
>
> Can you suffixize words? ?I have corner, cornercy, lunacy, emphatic,
> emphasize, a value of Y, orderings, say, remoticy, & cross. ?Come do
> graphics. ?Anybody speak?
>
> For verbs, I have: say, speak, see, talk, and stack. ?Pretty
> harmless. ?Still here?- Hide quoted text -
>
> - Show quoted text -

That's stay tuned I'M BARTENDER.  Is that a space BAR ZOOP.



From dmkim at mktec.co.kr  Sun May 25 22:19:03 2008
From: dmkim at mktec.co.kr (bbmerong)
Date: Sun, 25 May 2008 19:19:03 -0700 (PDT)
Subject: jkl
Message-ID: <865e1b89-4937-4e88-8d2e-6e270ef1f379@v26g2000prm.googlegroups.com>

jll


From geonomica at gmail.com  Thu May 22 18:33:42 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 15:33:42 -0700 (PDT)
Subject: ctypes help
Message-ID: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>

Hy,
I need help about use dll with ctypes. I've compiled my dll C library
and I copied it in c:\windows\system32. When I load it with
"myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
python don't see the dll function. with dir(myDLL) I've only this:
['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
'__getattr__', '__getattribute__', '__getitem__', '__hash__',
'__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
'_name']

Could anybody help me

Thanks

Gianluca


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 07:30:03 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 13:30:03 +0200
Subject: A quick question
In-Reply-To: <mailman.1680.1211971404.12834.python-list@python.org>
References: <g1jbtt+bf6m@eGroups.com>
	<mailman.1680.1211971404.12834.python-list@python.org>
Message-ID: <483d4235$0$20523$426a74cc@news.free.fr>

D'Arcy J.M. Cain a ?crit :
> On Wed, 28 May 2008 10:25:01 -0000
> "James" <cobrocks at msn.com> wrote:
>> Hey everyone,
>>
>> I just started using python and cant figure this out, I'm trying to 
>> make a program where someone types in a word and the program gives it 
>> back backwards.  For example if the person puts in "cat" I want the 
>> program to give it back as "tac" and what it does is prints out 3,2,1.  
>> How can I get these integers to print as letters?  This is what I have,
>>
>> word = raw_input("Type a word:")
>> start = len(word)
>>
>> for letter in range(start, 0, -1):
>>     print letter  
> 
> Ignore my previous message.  Too early.  Here is your script:
> 
> word = raw_input("Type a word:")
> for i in range(len(word), 0, -1):
>     print word[i]

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
IndexError: string index out of range

sequence indices are zero-based, so you want to start at len(word) -1. 
And the range upper limit (second argument) is not included. So you want 
to pass -1 here.




From fuzzyman at gmail.com  Wed May 21 17:27:37 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Wed, 21 May 2008 14:27:37 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com> 
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com> 
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
	<68tuhfF2unducU1@mid.uni-berlin.de>
	<8b9560fa-7f29-4bfe-b312-e3da0e3779b6@z24g2000prf.googlegroups.com>
	<68u1avF2ujou9U1@mid.uni-berlin.de>
	<e6720210-26e2-4c0f-a1f5-dc71aa143fe7@a1g2000hsb.googlegroups.com>
Message-ID: <be570e9e-346b-4d7f-a1db-cdf50b24bcf5@y38g2000hsy.googlegroups.com>

On May 14, 10:30?pm, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> > Dave Parker schrieb:
> > > All of the calculators and textbooks that elementary school students
> > > use, use "^" for powers.
>
> I've never seen this symbol in textbooks. In textbooks, powers are
> written using superscript.
>
> >> ?Just like Flaming Thunder does. ?I haven't
> > > seen "**" for powers since FORTRAN.
>
> I haven't seen any language using '^' as the power operator so far -
> but I've seen quite a lot of them using it as the bitwise XOR operator.


Excel uses the caret as the power operator. Arguably the worlds most
widely used programming environment...

Michael Foord
http://www.ironpythoninaction.com/


From kw at codebykevin.com  Sat May 10 11:31:37 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 10 May 2008 11:31:37 -0400
Subject: People still using Tkinter?
In-Reply-To: <mailman.896.1210396853.12834.python-list@python.org>
References: <mailman.896.1210396853.12834.python-list@python.org>
Message-ID: <4825BFD9.7020600@codebykevin.com>

Kenneth McDonald wrote:
> Any guesses as to how many people are still using Tkinter? And can 
> anyone direct me to good, current docs for Tkinter?
> 
> Thanks,
> Ken

I develop Tk applications commercially on Mac OS X, using Tcl and 
Python. Here's a screenshot of my Python app:

http://www.codebykevin.com/phynchronicity-running.png

This app is built on Python 2.5.1 and Tk 8.5.0. Tk 8.5 has a huge number 
of improvements over older versions of Tk:

http://www.tkdocs.com/resources/backgrounder.html

Most importantly, Tk 8.5 has a themed widget set that allows for 
platform-native appearance on Windows and Mac (not emulated, but hooking 
into system API's). The themed widget set also adds a lot of new 
widgets, such as combobox, tree, and others. The older widget set is 
still available as well and they can be freely matched. Tk also has a 
lot of lightweight, script-level widget libraries that can also enhance 
the appearance and usability of your app.

My own app uses widgets from Tk's traditional set, the new Tile/ttk set, 
the Tabelist widget, and the BWidget widget library. It uses the 
following Python wrappers for these widgets:

http://tkinter.unpy.net/wiki/TileWrapper
http://tkinter.unpy.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/bwidget/

It also uses a few private wrappers/custom widgets.

In addition to the Python-specifc resources that others have provided, 
here's a new site that documents the latest-and-greatest Tk techniques, 
including Tile/ttk:

http://www.tkdocs.com/

The developer of this site is mainly interest in Tcl and Ruby, so 
examples of those are provided--I may provide some Python examples at 
some point. But there should be enough code snippets there for you to 
get started, especially if you already have some experience with 
Tk/Tkinter.

Tk still has some limitations, including a lack of cross-platform 
printing support (the canvas widget generates postscript, but that's not 
enough anymore) and an incomplete cross-platform drag-and-drop mechanism 
(works fine on Windows, it's buggy on *NIx because Xdnd is so 
inconsistent, and it was never developed for OS X). If you absolutely 
need these features, look at wxPython or PyQt. But coming to Python from 
a Tcl background, I'm very comfortable with Tk--it is lightweight, 
extremely flexible, and (as I hope you can see from my screenshot) it's 
possible to do sophisticated user interfaces with it. It fits my brain 
much better than wxPython, for instance. And the long effort by Tk's 
developers to modernize its appearance has finally paid off, I think.

Hope that helps,
Kevin

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From ian.g.kelly at gmail.com  Fri May  9 00:28:51 2008
From: ian.g.kelly at gmail.com (Ian Kelly)
Date: Thu, 8 May 2008 22:28:51 -0600
Subject: Mathematics in Python are not correct
In-Reply-To: <1210306536.4823cfe8be627@comuh.uh.cu>
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<200805081914.06459.kyrie@uh.cu> <48239601.1070200@cheimes.de>
	<1210306536.4823cfe8be627@comuh.uh.cu>
Message-ID: <3fc761710805082128o616adc2dxdd5222f55ea078c@mail.gmail.com>

On Thu, May 8, 2008 at 10:15 PM, Luis Zarrabeitia <kyrie at uh.cu> wrote:
>  Weird, I can't find neither... (which wikipedia article? Couldn't find one about
>  C99.)

Try http://en.wikipedia.org/wiki/Exponentiation#Zero_to_the_zero_power


From dave.g1234 at gmail.com  Fri May 16 14:45:57 2008
From: dave.g1234 at gmail.com (dave.g1234 at gmail.com)
Date: Fri, 16 May 2008 11:45:57 -0700 (PDT)
Subject: namespaces and eval
Message-ID: <67508298-e382-436b-99a1-4a7fa4be2487@h1g2000prh.googlegroups.com>

Sorry for the repost, didnt' quite finish

Suppose I have a function in module X that calls eval e.g,

X.py
_______
Def foo(bar):
        Eval(bar)
_______

Now eval will be called using the default eval(bar,globals(),locals())
and globals will pull in anything in module X.

Now I have module Y that calls bar like so
Y.py
________
from x import *
def biz():
        print "Im a silly example!"
Foo("biz()")
_______

Python will complain that it cannot find biz because it's not the X
module.

My question - is there any way to a) get a listing of active namespaes
search ALL active namespaces for a particular variable b) get the
namespace of the caller withing passing it in (here, Y) c) do anything
else to get biz without passing foo("biz()",locals(),globals()) or
hacking biz into the __builtin__ namespace(don't know if it's even
possible, but it defeats the purpose of what I'm trying to do) ?  I
realize this is here for a reason, but I'm working on something that's
kind of a hack already

Thanks
dave


More gratuitous context. Long story I'm trying to write a hack for a
concise way of adding arbitrary methods to objects for JPA/JQuery like
chaning eg.

def foo(self):
    print "foo"
    return self;

wrap(x).foo().foo().foo().foo() etc....

instead of x.foo = foo, which alters the object.

class wrap:
    def __init__(self, obj, globalz=globals(),localz= locals()):
        self.obj = obj
        self.localz = localz;
        self.globalz = globalz;

    def __callback__(self, *args, **kw):
        newargs = [self.obj];
        newargs.extend(args);
        print locals
        ret = eval(self.name, self.globalz, self.localz)
(*newargs,**kw);
        return wrap(ret);

    def __getattr__(self,name):
        if hasattr(self.obj,name):
            return getattr(self.obj,name);
        self.name = name;
        return self.__callback__;








From danb_83 at yahoo.com  Thu May  8 22:33:00 2008
From: danb_83 at yahoo.com (Dan Bishop)
Date: Thu, 8 May 2008 19:33:00 -0700 (PDT)
Subject: Mathematics in Python are not correct
References: <52c855d8-5609-43e0-b98f-9fa87b2808c2@m3g2000hsc.googlegroups.com>
	<mailman.817.1210288386.12834.python-list@python.org>
Message-ID: <6a0e537e-2487-4bed-b84c-3b84ae46aaa4@b5g2000pri.googlegroups.com>

On May 8, 6:14?pm, Luis Zarrabeitia <ky... at uh.cu> wrote:
> On Thursday 08 May 2008 06:54:42 pm wxPytho... at gmail.com wrote:
>
> > The problem is that Python parses -123**0 as -(123**0), not as
> > (-123)**0.
>
> Actually, I've always written it as (-123)**0. At least where I'm from,
> exponentiation takes precedence even over unary "-". (to get a power of -123,
> you must write $(-123)^0$ [latex])

FWIW, my TI-89 evaluates it as -1.

> Though not an authoritative source, wikipedia also uses the (-x)^y notation:http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one
>
> Btw, there seems to be a math problem in python with exponentiation...
>
> >>> 0**0
>
> 1
>
> That 0^0 should be a nan or exception, I guess, but not 1.
>
> [just found out while trying the poster's example]

Technically correct, but 0**0 == 1 is actually pretty useful.  For one
thing, it lets you create a Vandermonde matrix without making 0 a
special case.


From aisaac at american.edu  Thu May  8 15:40:25 2008
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 May 2008 19:40:25 GMT
Subject: observer pattern question #1 (reference to subject)
In-Reply-To: <iqxoalg6.fsf@gmail.com>
References: <P4EUj.24095$zw.1789@trnddc04> <iqxoalg6.fsf@gmail.com>
Message-ID: <JGIUj.52528$Bb3.41853@trnddc01>

> Alan Isaac <aisaac at american.edu> writes:

>> Is anything lost by not maintaining this reference (other 

>> than error checking ...)?  If I feel the observer needs 

>> access to the subject, what is wrong with just having the 

>> subject pass itself as part of the notification? 





Ville M. Vainio wrote:

> It reduces the number of places the observer can be called 

> from, because now the event source is part of the function 

> signature. If you omit the event source in the signature, 

> you gain looser coupling - it's the observer business to 

> create the dependency. 



As I said, I'm not a programmer, and perhaps as a result, 

I have questions about both of your points.  I'll stick with 

the stock example, since it is concrete.



Note that the observor/listener in the example at

<URL:http://en.wikipedia.org/wiki/Observer_pattern>

does not create a reference to the subject.

So in this context I take you to be saying something like 

the following: "OK, here's the pattern, now your listener 

wants to know the event source, do not ask something new the 

subject to respond to that need.  That is unnecessary 

coupling.  Instead, just rewrite your listener to maintain 

a reference to the subject."



Do I have that right?



It seems to me that this response begs the question.

That is, an appropriate reply seems to be: here is a related 

pattern, call it observer2.  In the observer2 pattern, the 

subject has a getState method and always passes itself when

it notifies the observer. Now: in what sense does this 

require closer coupling?





> Also, consider the situation where you want all investors 

> to refresh their idea about stock prices (because of, 

> short network failure). It's easy to run through a list of 

> them and call update() for everybody, while it's not so 

> easy to find out what stock the investor is observing 

> (that's the investors business!) and pass that object to 

> the investor in the call. 



I seem to be missing your point here.

Let's keep using the stock/investor example.

When the network comes up, each stock should notifies 

everyone in its list of listeners.  It either passes itself

or does not.  In either case, the investor took care of hir 

side of the business by registering as a listener.

If the stock does not notify all its registered investors, 

it is breaking its contract.  So, what is the problem?



Or to put it a different way, your suggestion that the 

investors should have to *pull* this information from the 

stocks seems out of step with the observer pattern, where 

the stocks should be pushing this information to the 

investor.



Again, talk of stocks and investors is just a convenient 

short hand for discussing the observer pattern.  I do not 

care about stocks/investors more than other applications.



> Are these school questions btw?



No, sorry.  But I still appreciate the feedback.



Cheers,

Alan Isaac




From bruno.42.desthuilliers at websiteburo.invalid  Tue May 20 10:10:32 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 20 May 2008 16:10:32 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <038e4418$0$27258$c3e8da3@news.astraweb.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <4832dbd0$0$23017$426a74cc@news.free.fr>

John Salerno a ?crit :
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. 

(snip)
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)

As far as I'm concerned (and I'm a big fan of list-comps, generator 
expressions etc), this is definitively an abuse. And a waste of 
resources since it builds  a useless list of 'None'.


From m.shanmugarajan at gmail.com  Thu May 22 03:11:18 2008
From: m.shanmugarajan at gmail.com (Shanmuga Rajan)
Date: Thu, 22 May 2008 12:41:18 +0530
Subject: Need help on Soappy
Message-ID: <269329b40805220011v1982f61j3c9a2e4e15f1dd37@mail.gmail.com>

I am developing a application using webservices. I am using Soappy.
When  i tried to start reading some wsdl files from web service server then
i got the following error. Can any one please help me with this.


>>>
>>>
>>> from SOAPpy import WSDL
>>> wsdlFile = 'http://192.168.1.81/sdk/vim.wsdl'
>>> server = WSDL.Proxy(wsdlFile)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/site-packages/SOAPpy/WSDL.py", line 73, in
__init__
    service = self.wsdl.services[0]
  File "/usr/lib/python2.4/site-packages/SOAPpy/wstools/Utility.py", line
1138, in __getitem__
    return self.list[key]
IndexError: list index out of range
>>>


Advance Thanks for any help.
-- 

Cheers!
Shan
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From mail at timgolden.me.uk  Tue May 20 15:45:15 2008
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 20 May 2008 20:45:15 +0100
Subject: List of disk drives on Windows?
In-Reply-To: <2008052013180816807-bob@passcalnmtedu>
References: <2008052013180816807-bob@passcalnmtedu>
Message-ID: <48332A4B.6050605@timgolden.me.uk>

Bob Greschke wrote:
> This MUST have been asked before, but I can't seem to Google the right 
> thing.  How can I get a list of drives on a Windows box, like ["C:\", 
> "D:\"], like I can if I do something like listdir("/Volumes") on a Mac?

A couple of options to get the ball rolling:

1) win32api.GetLogicalDriveStrings()

2) http://timgolden.me.uk/python/wmi_cookbook.html#find-drive-types


TJG


From efurman at admailinc.com  Mon May  5 14:56:26 2008
From: efurman at admailinc.com (Ethan Furman)
Date: Mon, 05 May 2008 10:56:26 -0800
Subject: cgitb performance issue
Message-ID: <481F585A.5080707@admailinc.com>

Greetings!

I tried adding a form to our website for uploading large files.  
Personally, I dislike the forms that tell you you did something wrong 
and make you re-enter *all* your data again, so this one cycles and 
remembers your answers, and only prompts for the file once the rest of 
the entered data is good.  However, the first time the form loads it can 
take up to 30 seconds... any ideas why?

My server is using Apache 2.0.53 and Python 2.4.1 on a FreeBSD 5.4 system.

Thanks!
-- 
Ethan
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From nick at craig-wood.com  Tue May 20 11:30:04 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 20 May 2008 10:30:04 -0500
Subject: Write bits in file
References: <aef7ba5e-b9f3-4cfc-ba03-3ffb38081eec@59g2000hsb.googlegroups.com>
	<g0p6u1$nk8$1$8300dec7@news.demon.co.uk>
	<c60116da-a2e6-4776-88ad-07f40d662920@d45g2000hsc.googlegroups.com>
Message-ID: <slrng35rce.8v2.nick@irishsea.home.craig-wood.com>

Monica Leko <monica.leko at gmail.com> wrote:
>  On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> > You want your file considered as a sequence of bits rather
> > than a sequence of 8-bit bytes, do you?
> 
>  Yes.
> 
> > is the 10-bit bit-pattern to be stored at an arbitrary
> > bit-position in the file
> 
>  Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
>  sequence of bytes, than 10 bits again, etc.

You could try

  http://construct.wikispaces.com/

which could well do exactly what you want.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From bearophileHUGS at lycos.com  Tue May 20 09:46:11 2008
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: Tue, 20 May 2008 06:46:11 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
Message-ID: <7aa231e6-2f9c-4e90-8cd1-e839dc6940f2@x35g2000hsb.googlegroups.com>

John Salerno:
> What does everyone think about this?

The Example 2 builds a list, that is then thrown away. It's just a
waste of memory (and time).

Bye,
bearophile


From gagsl-py2 at yahoo.com.ar  Sat May 24 22:50:40 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 May 2008 23:50:40 -0300
Subject: Decorator metaclass
References: <219a475b-c6e3-4128-98bc-d73fd215ce67@w7g2000hsa.googlegroups.com>
	<200805230739.29745.maric@aristote.info>
	<g175nc$4ao$1@ger.gmane.org>
Message-ID: <op.uboviqtbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 23 May 2008 16:25:19 -0300, Thomas Karolski <Thomas.Karolski at googlemail.com> escribi?:

> Turns out the first msg I sent did not reach the list, so I'll just post
> what I've achieved by now:

[snip a couple of long metaclasses]

> Now the reason why I'm using decorators, is because I want to be ably to
> add the functionality dynamicly - without the need of construction
> classes for the different possibilities. Composite pattern does not help
> in this case, since I lose the ability to choose in what order I call
> the decorator's and the decorated's methods.

I haven't looked in detail to your code, but if that is what you want, you don't need a Decorator metaclass at all. Just add/replace the desired methods inside the class itself (Python is a dynamic language, remember).

py> class A(object):
...   def foo(self): print "In foo, self=", self
...
py> def bar(self): print "In bar, self=", self
...
py> a = A()
py> a.foo()
In foo, self= <__main__.A object at 0x00A3CD50>
py>
py> A.bar = bar
py> a.bar
<bound method A.bar of <__main__.A object at 0x00A3CD50>>
py> a.bar()
In bar, self= <__main__.A object at 0x00A3CD50>

You can even add methods to individual instances:

py> def baz(self): print "In baz, self=", self
...
py> import new
py> b = A()
py> b.baz = new.instancemethod(baz, b, type(b))
py> a.baz()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: 'A' object has no attribute 'baz'
py> b.baz
<bound method A.baz of <__main__.A object at 0x00A3CDD0>>
py> b.baz()
In baz, self= <__main__.A object at 0x00A3CDD0>

-- 
Gabriel Genellina



From ivan.illarionov at gmail.com  Wed May 28 10:49:26 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Wed, 28 May 2008 14:49:26 +0000 (UTC)
Subject: php vs python
References: <-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>
	<g1cjnb$1p57$1@news.mtu.ru>
	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>
	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>
	<g1d1a4$1rpd$2@news.mtu.ru> <613388153.20080528051020@freemail.ru>
	<g1icn8$r5$1@news.mtu.ru> <5dtp34thl4a0ipeb5lm550uslud0jhpvua@4ax.com>
Message-ID: <g1jrdm$a12$1@news.mtu.ru>

On Wed, 28 May 2008 06:04:54 +0000, Tim Roberts wrote:

> Ivan Illarionov <ivan.illarionov at gmail.com> wrote:
>>On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>> 
>>>>> As I've said before - good programmers can write good code in any
>>>>> language.
>>> 
>>>> Yes, they can. But it may be harder to do for them in one language
>>>> and easier in another.
>>...
>>No. Language does matter.
> 
> A good programmer keeps many tools in his toolbox, and understands which
> tools provide the best service for the problem at hand.

Agree, I keep Python, C and x86 assembly in my toolbox. And this toolbox 
is perfect.

Actually, even PHP has its place in my toolbox, but, *only when I can't 
use Python*, eg Sourceforge.net servers don't have good Python support 
and PHP starts to make sense.

Language matters.

Ivan


From kw at codebykevin.com  Tue May 13 13:59:35 2008
From: kw at codebykevin.com (Kevin Walzer)
Date: Tue, 13 May 2008 13:59:35 -0400
Subject: where to get McMillan Installer?
In-Reply-To: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
References: <74f142de-6485-4773-bae8-2a274be19b80@w7g2000hsa.googlegroups.com>
Message-ID: <a298d$4829d22b$4275d90a$12993@FUSE.NET>

gsal wrote:
> There does not seem to be a valid url for the Installer, anywhere.
> Could anyone provide me with a copy of it?
> 
> many thanks.

http://pyinstaller.python-hosting.com/

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From vivainio at gmail.com  Tue May 13 02:17:19 2008
From: vivainio at gmail.com (Ville M. Vainio)
Date: Tue, 13 May 2008 06:17:19 GMT
Subject: python vs. grep
References: <011f43ea-9bc8-499a-a3fe-dba24b47932e@c58g2000hsc.googlegroups.com>
	<mailman.679.1210109656.12834.python-list@python.org>
	<b7abfadf-05c8-4636-8b6f-5d12f7d22f38@56g2000hsm.googlegroups.com>
	<mailman.813.1210286049.12834.python-list@python.org>
	<7f44a73f-e88d-4edc-97e5-95cac7a26b14@2g2000hsn.googlegroups.com>
	<mailman.1004.1210630577.12834.python-list@python.org>
Message-ID: <87k5hy20eo.fsf@gmail.com>

Ricardo Ar?oz <ricaraoz at gmail.com> writes:

> The easy/simple (too easy/simple?) way I see out of it is to read THE
> WHOLE file into memory and don't worry. But what if the file is too

The easiest and simplest approach is often the best with
Python. Reading in the whole file is rarely too heavy, and you omit
the python "object overhead" entirely - all the code executes in the
fast C extensions.

If the file is too big, you might want to look up mmap:

http://effbot.org/librarybook/mmap.htm


From gandalf at shopzeus.com  Thu May 15 07:45:19 2008
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 15 May 2008 13:45:19 +0200
Subject: create window on panel
In-Reply-To: <93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
References: <f4bd7fcb-818e-492d-a2c0-d2f29fad041e@z16g2000prn.googlegroups.com>	<mailman.1153.1210845280.12834.python-list@python.org>
	<93cd94a9-4fc6-46a9-b0b6-2303371d5245@h1g2000prh.googlegroups.com>
Message-ID: <482C224F.3050509@shopzeus.com>


> Thanks for your reply!
>
> I am using Linux+gnome. Actually, what I want is simply a text-region
> on the panel
> and display some dynamic information on it. Is it hard to do it ?
>   
Google is your friend! I searched for "gnome python panel" and the first 
hit was:


http://www.onlamp.com/pub/a/python/2000/07/25/gnome_applet.html

:-)

Of course it is out of date but you can see that there is something 
called "/PyGNOME".
/
The package names on my Linux:

python-gnome2 python-gnome2-desktop python-gnome2-extras python-gnomecanvas

Description:

Python bindings for the GNOME desktop environment
This archive contains modules that allow you to write GNOME programs
in Python. This package contains the bindings for the new version 2.0
of that desktop environment.

URL: http://www.daa.com.au/~james/software/pygtk/
/
/It should be easy to read the docs, view the demo programs and create 
your own program.

L



From mensanator at aol.com  Sat May 17 20:50:56 2008
From: mensanator at aol.com (Mensanator)
Date: Sat, 17 May 2008 17:50:56 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com> 
	<82e6d704-95a8-4795-93a3-0650a0eaca27@d45g2000hsc.googlegroups.com>
Message-ID: <bb0b9560-5d37-4706-b3b9-82137da3bd85@27g2000hsf.googlegroups.com>

On May 17, 4:02?am, Sanoski <Joshuajr... at gmail.com> wrote:
> The reason I ask about text files is the need to save the data
> locally, and have it stored in a way where backups can easily
> be made.

Sure, you can always do that if you want. But if your target
is SQLlite or MS-Access, those are files also, so can be
backed up as easily as text files.

>
> Then if your computer crashes and you lose everything, but
> you have the data files it uses backed up, you can just
> download the program, extract the backed up data to a
> specific directory, and then it works exactly the way it
> did before you lost it. I suppose a SQLite database might
> solve this, but I'm not sure.

It will. Remember, once in a database, you have value-added
features like filtering, sorting, etc. that you would have
to do yourself if you simply read in text files.

> I'm just getting started, and I
> don't know too much about it yet.

Trust me, a database is the way to go.
My preference is MS-Access, because I need it for work.
It is a great tool for learning databases because it's
visual inteface can make you productive BEFORE you learn
SQL.

>
> I'm also still not sure how to download and associate the pictures
> that each entry has for it.

See example at end of post.

> The main thing for me now is getting
> started. It needs to get information from the web. In this case,
> it's a simple XML feed.

BeautifulSoup also has an XML parser. Got to their
web page and read the documentation.

> The one thing that seems that would
> make it easier is every post to the feed is very consistent.
> Each header starts with the letter A, which stands for Alpike
> Tech, follow by the name of the class, the room number, the
> leading student, and his GPA. All that is one line of text.
> But it's also a link to more information. For example:
>
> A Economics, 312, John Carbroil, 4.0
> That's one whole post to the feed. Like I say, it's very
> simple and consistent. Which should make this easier.

That's what you want for parsing, how to seperate
a composite set of data. Simple can sometimes be
done with split(), complex with regular expressions.

>
> Eventually I want it to follow that link and grab information
> from there too, but I'll worry about that later. Technically,
> if I figure this first part out, that problem should take
> care of itself.
>


A sample picture scraper:

from BeautifulSoup import BeautifulSoup
import urllib2
import urllib

#
# start by scraping the web page
#
the_url="http://members.aol.com/mensanator/OHIO/TheCobs.htm"
req = urllib2.Request(url=the_url)
f = urllib2.urlopen(req)
www = f.read()
soup = BeautifulSoup(www)
print soup.prettify()

#
# a simple page with pictures
#
##<html>
## <head>
##  <title>
##   Ohio - The Cobs!
##  </title>
## </head>
## <body>
##  <h1>
##   Ohio Vacation Pictures - The Cobs!
##  </h1>
##  <hr />
##  <img src="AUT_2784.JPG" />
##  <br />
##  WTF?
##  <p>
##   <img src="AUT_2764.JPG" />
##   <br />
##   This is surreal.
##  </p>
##  <p>
##   <img src="AUT_2765.JPG" />
##   <br />
##   Six foot tall corn cobs made of concrete.
##  </p>
##  <p>
##   <img src="AUT_2766.JPG" />
##   <br />
##   109 of them, laid out like a modern Stonehenge.
##  </p>
##  <p>
##   <img src="AUT_2769.JPG" />
##   <br />
##   With it's own Druid worshippers.
##  </p>
##  <p>
##   <img src="AUT_2781.JPG" />
##   <br />
##   Cue the
##   <i>
##    Also Sprach Zarathustra
##   </i>
##   soundtrack.
##  </p>
##  <p>
##   <img src="100_0887.JPG" />
##   <br />
##   Air & Space Museums are a dime a dozen.
##   <br />
##   But there's only
##   <b>
##    one
##   </b>
##   Cobs!
##  </p>
##  <p>
##  </p>
## </body>
##</html>

#
# parse the page to find all the pictures (image tags)
#
the_pics = soup.findAll('img')

for i in the_pics:
  print i

##<img src="AUT_2784.JPG" />
##<img src="AUT_2764.JPG" />
##<img src="AUT_2765.JPG" />
##<img src="AUT_2766.JPG" />
##<img src="AUT_2769.JPG" />
##<img src="AUT_2781.JPG" />
##<img src="100_0887.JPG" />

#
# the picutres have no path, so must be in the
# same directory as the web page
#
the_jpg_path="http://members.aol.com/mensanator/OHIO/"

#
# now with urllib, copy the picture files to the local
# hard drive renaming with sequence id at the same time
#
for i,j in enumerate(the_pics):
  p = the_jpg_path + j['src']
  q = 'C:\\scrape\\' + 'pic' + str(i).zfill(4) + '.jpg'
  urllib.urlretrieve(p,q)

#
# and here's the captured files
#
##  C:\>dir scrape
##   Volume in drive C has no label.
##   Volume Serial Number is D019-C60D
##
##   Directory of C:\scrape
##
##  05/17/2008  07:06 PM    <DIR>          .
##  05/17/2008  07:06 PM    <DIR>          ..
##  05/17/2008  07:05 PM            69,877 pic0000.jpg
##  05/17/2008  07:05 PM            71,776 pic0001.jpg
##  05/17/2008  07:05 PM            70,958 pic0002.jpg
##  05/17/2008  07:05 PM            69,261 pic0003.jpg
##  05/17/2008  07:05 PM            70,653 pic0004.jpg
##  05/17/2008  07:05 PM            70,564 pic0005.jpg
##  05/17/2008  07:05 PM           113,356 pic0006.jpg
##                 7 File(s)        536,445 bytes
##                 2 Dir(s)  27,823,570,944 bytes free


From wgumgfy at gmail.com  Sat May 10 03:56:33 2008
From: wgumgfy at gmail.com (Waylen Gumbal)
Date: Sat, 10 May 2008 00:56:33 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
Message-ID: <68l2piF2sv620U1@mid.individual.net>

George Neuner wrote:
> On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
> wrote:



> > Not everyone follows language-neutral groups (such as
> > comp,programming as you pointed out), so you actually reach more
> > people by cross posting. This is what I don't understand - everyone
> > seems to assume that by cross posting, one intends on start a
> > "flamefest", when in fact most such "flamefests" are started by
> > those who cannot bring themselves to skipping over the topic that
> > they so dislike.
>
> The problem is that many initial posts have topics that are misleading
> or simplistic.  Often an interesting discussion can start on some
> point the initial poster never considered or meant to raise.

Is this not a possibility for any topic, whether it's cross-posted or 
not?


-- 
wg 




From stevegill7 at gmail.com  Fri May  2 09:47:11 2008
From: stevegill7 at gmail.com (Jetus)
Date: Fri, 2 May 2008 06:47:11 -0700 (PDT)
Subject: creating a list from a inconsistent text file
References: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>
	<680bmrF2r409aU4@mid.uni-berlin.de>
Message-ID: <ee1019ee-7bd5-4581-af4f-87a30824c38e@a1g2000hsb.googlegroups.com>

On May 2, 7:19 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 02 May 2008 04:14:47 -0700, Jetus wrote:
> > I have a comma delimited file that is separated by comma's, and then
> > sometimes by ","
>
> > c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
> > 1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
> > c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
> > 2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
> > c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
> > 3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "
>
> The items are always delimited by commas but some items themselves contain
> a comma and therefore are enclosed in double quotes.  So it's not
> inconsistent.
>
> > How do I convert that line into a list?
>
> Use the `csv` module in the standard library.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Hello Marc;
Thanks for the input! I am worried about the comma in the "" data
items, how do I tell Python to look for the "" data first, then use
the comma separator?


From shahmed at sfwmd.gov  Tue May 20 12:02:20 2008
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Tue, 20 May 2008 12:02:20 -0400
Subject: Removing Space and "-" from a string
In-Reply-To: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
References: <88a2268e-4e9c-48a6-9d23-30a34f751025@z16g2000prn.googlegroups.com>
Message-ID: <14A2A120D369B6469BB154B2D2DC34D20B0F1772@EXCHVS01.ad.sfwmd.gov>

I have thousands of records in MS Access database table, which records I
am fetching using python script. One of the columns having string like 
'8 58-2155-58'

Desired output: '858215558'

I want to remove any spaces between string and any dashes between
strings. I could do it in access manually but want to do from python
script 

Any help is highly appreciated.

sh


From exarkun at divmod.com  Wed May 14 17:09:45 2008
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 14 May 2008 17:09:45 -0400
Subject: sys.excepthack...
In-Reply-To: <dullrich-866845.15471814052008@text.giganews.com>
Message-ID: <20080514210945.6859.1840458315.divmod.quotient.63533@ohm>

On Wed, 14 May 2008 15:47:18 -0500, "David C. Ullrich" <dullrich at sprynet.com> wrote:
> [snip]
>
>Came up with a ridiculous hack involving both sys.stderr
>and sys.excepthook. Works exactly the way I want.
>Seems ridiculous - what's the right way to do this?
>
> [snip]

Hi David,

Take a look at the traceback module.  The excepthook gets called with
an exception type, instance, and traceback object.  The traceback module
is good at turning these things into strings.

Jean-Paul


From s0suk3 at gmail.com  Tue May  6 02:30:38 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Mon, 5 May 2008 23:30:38 -0700 (PDT)
Subject: How can we write a class factory that dynamically redefines the 
	__init__ function etc.
References: <4878ad7b0805051634k2666943bmd71fa9947816ab68@mail.gmail.com> 
	<mailman.628.1210050918.12834.python-list@python.org>
Message-ID: <4de665d4-301f-4d86-ad1c-026ab77a2d0e@w7g2000hsa.googlegroups.com>

On May 6, 12:14 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> (the convention is to use lowercase names for attributes: rawdata instead
> of RawData)
>

But at least put an underscore between the words (raw_data), or, if
you like the OO world, make the subsequent words capitalized
(rawData).


From arnodel at googlemail.com  Mon May 12 04:30:59 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 12 May 2008 01:30:59 -0700 (PDT)
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<482650a5$1@news.mel.dft.com.au>
	<gOWdnWd-PvdZ9LvVnZ2dnUVZ_gGdnZ2d@visi>
Message-ID: <65d792a8-4469-404c-8287-1357170eea05@x35g2000hsb.googlegroups.com>

On May 11, 4:36?am, Grant Edwards <gra... at visi.com> wrote:
> On 2008-05-11, John Machin <sjmac... at lexicon.net> wrote:
>
>
>
> >> "Write a program that prints the numbers from 1 to 100. But for
> >> multiples of three print "Fizz" instead of the number and for the
> >> multiples of five print "Buzz". For numbers which are multiples of
> >> both three and five print "FizzBuzz".
>
> >> for i in range(1,101):
> >> ? ? if i%3 == 0 and i%5 != 0:
> >> ? ? ? ? print "Fizz"
> >> ? ? elif i%5 == 0 and i%3 != 0:
> >> ? ? ? ? print "Buzz"
> >> ? ? elif i%5 == 0 and i%3 == 0:
> >> ? ? ? ? print "FizzBuzz"
> >> ? ? else:
> >> ? ? ? ? print i
>
> >> is there a better way than my solution? is mine ok?
>
> > Try doing it using %3 and %5 only once each.
>
> for i in xrange(101):
> ? ? print (("","Fizz")[i%3==0] + ("","Buzz")[i%5==0]) or str(i)
>
> His is better though, since it's more obvious what's intended.
>
> Here's one that's less opaque
>
> for i in xrange(101):
> ? ? s = ""
> ? ? if i%3 == 0: s += "Fizz"
> ? ? if i%5 == 0: s += "Buzz"
> ? ? if s:
> ? ? ? ? print s
> ? ? else:
> ? ? ? ? print i
>

Let's not forget to generalise the problem and code it OOP-style :)

class FizzBuzzer(object):
    def __init__(self, *fizzles):
        self.fizzles = fizzles
    def translate(self, n):
        return ''.join(val for (p, val) in self.fizzles if not n%p) or
n
    def range(self, start, stop=None, step=None):
        if stop is None:
            start, stop = 0, start
        if step is None:
            step = 1
        for n in xrange(start, stop, step):
            yield self.translate(n)
    def __getitem__(self, obj):
        if isinstance(obj, slice):
            return self.range(obj.start, obj.stop, obj.step)
        else:
            return self.translate(obj)

# FizzBuzzer in action:

>>> fizzbuzz = FizzBuzzer((3, 'Fizz'), (5, 'Buzz'))
>>> for val in fizzbuzz[1:21]:
...     print val
...
1 21 1
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
16
17
Fizz
19
Buzz
>>> abc = FizzBuzzer((2, 'Ah'), (3, 'Bee'), (5, 'Cee'))
>>> list(abc[25:35])
25 35 1
['Cee', 'Ah', 'Bee', 'Ah', 29, 'AhBeeCee', 31, 'Ah', 'Bee', 'Ah']
>>>

--
Arnaud



From fc14301589 at icqmail.com  Sun May 25 12:19:59 2008
From: fc14301589 at icqmail.com (TheSaint)
Date: Mon, 26 May 2008 00:19:59 +0800
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net> <4837ba88_1@news.tm.net.my>
	<ju9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <483991af_2@news.tm.net.my>

On 19:14, sabato 24 maggio 2008 Johannes Bauer wrote:

> Well, I do not really see your point
You wrote C statements and I felt that you were trying to apply to python
interpreter.
I think that a minimun of knoweledge on python grammar it's the base for
doing some programming.
If your examples were there only to explain your meaning, then I'm wrong
here.



From noah at noah.org  Tue May  6 20:14:30 2008
From: noah at noah.org (Noah)
Date: Tue, 6 May 2008 17:14:30 -0700 (PDT)
Subject: How do you debug memory usage?
References: <mailman.652.1210080485.12834.python-list@python.org> 
	<56a12734-15ce-423b-af29-b027e2188266@q1g2000prf.googlegroups.com> 
	<mailman.678.1210108782.12834.python-list@python.org>
Message-ID: <d76fa78c-fd2b-49e5-8e58-13d7a71a98b3@a9g2000prl.googlegroups.com>

On May 6, 2:19 pm, David <wizza... at gmail.com> wrote:
> I want to debug rdiff-backup (Python backup tool for Linux) - it's
> using 2 GB of memory (1GB ram, 1GB swap) on a backup server at work.
> ...
> David

Rsync uses a lot of memory:
   http://www.samba.org/rsync/FAQ.html#4
rdiff-backup uses librsync, not rsync.
I'm not sure if rsync uses librsync, but one could speculate that
they share some code and perhaps some of the same problems.
But 2GB seems excessive unless you are dealing with millions of files.
A memory leak seems more likely.
--
Noah


From wuwei23 at gmail.com  Tue May 27 22:19:19 2008
From: wuwei23 at gmail.com (alex23)
Date: Tue, 27 May 2008 19:19:19 -0700 (PDT)
Subject: confused by HTMLParser class
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <a599e3b1-f040-4dd2-b27f-040e815081bb@w8g2000prd.googlegroups.com>

On May 28, 11:20 am, globalrev <skanem... at yahoo.se> wrote:
> tried all kinds of combos to get this to work.

Did you try searching this group? There were recent posts discussing
basic usage of HTMLParser.

Throwing random code together is the least likely way to actually get
it to work.

> x = MyHTMLParser(HTMLParser())
> site = urllib.urlopen("http://docs.python.org/lib/module-
> HTMLParser.html")
> for row in site:
>     print x.handle_starttag()

Why are you passing HTMLParser in to initialise MyHTMLParser?

Why are you iterating over site and expecting your instance of
MyHTMLParser to magically know about it?

Why haven't you read the urllib.urlopen docs, to see you need to do
a .read() to actually get the page data?

Why are you so resistant to reading some basic tutorials?


From lew at lewscanon.com  Sat May 10 08:26:55 2008
From: lew at lewscanon.com (Lew)
Date: Sat, 10 May 2008 08:26:55 -0400
Subject: The Importance of Terminology's Quality
In-Reply-To: <68l2piF2sv620U1@mid.individual.net>
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<lmu424djdnfsb6nbqjgo4kebrpmn7vm4p9@4ax.com>
	<fm55241ivmal876v6nrnrh4s56t3jl3dtb@4ax.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
	<eth9249j65rkqhiuok07tbpisl07o569n9@4ax.com>
	<68l2piF2sv620U1@mid.individual.net>
Message-ID: <IfSdnTVIiu0SCbjVnZ2dnUVZ_qrinZ2d@comcast.com>

Waylen Gumbal wrote:
> George Neuner wrote:
>> On Thu, 8 May 2008 22:38:44 -0700, "Waylen Gumbal" <wgumgfy at gmail.com>
>> wrote:
> 
> 
> 
>>> Not everyone follows language-neutral groups (such as
>>> comp,programming as you pointed out), so you actually reach more
>>> people by cross posting. This is what I don't understand - everyone
>>> seems to assume that by cross posting, one intends on start a
>>> "flamefest", when in fact most such "flamefests" are started by
>>> those who cannot bring themselves to skipping over the topic that
>>> they so dislike.
>> The problem is that many initial posts have topics that are misleading
>> or simplistic.  Often an interesting discussion can start on some
>> point the initial poster never considered or meant to raise.
> 
> Is this not a possibility for any topic, whether it's cross-posted or 
> not?

You guys are off topic.  None of the million groups to which this message was 
posted are about netiquette.

-- 
Lew


From sebastian.noack at googlemail.com  Mon May 26 16:44:28 2008
From: sebastian.noack at googlemail.com (sebastian.noack at googlemail.com)
Date: Mon, 26 May 2008 13:44:28 -0700 (PDT)
Subject: tarfile.open(mode='w:gz'|'w|gz'|..., fileobj=StringIO()) fails.
Message-ID: <133193d2-a87f-4000-b70c-29fdbb36f6d0@59g2000hsb.googlegroups.com>

Hi,

is there a way to or at least a reason why I can not use tarfile to
create a gzip or bunzip2 compressed archive in the memory?

You might might wanna answer "use StringIO" but this isn't such easy
as it seems to be. ;) I am using Python 2.5.2, by the way. I think
this is a bug in at least in this version of python, but maybe
StringIO isn't just file-like enough for this "korky" tarfile module.
But this would conflict with its documentation.

"For special purposes, there is a second format for mode: 'filemode|
[compression]'. open() will return a TarFile object that processes its
data as a stream of blocks. No random seeking will be done on the
file. If given, fileobj may be any object that has a read() or write()
method (depending on the mode)."

Sounds good, but doesn't work. ;P StringIO provides a read() and
write() method amongst others. But tarfile has especially in this mode
problems with the StringIO object.

I extracted the code out of my project into a standalone python script
to proof this issue on the lowest level. You can run the script below
as following: ./StringIO-tarfile.py file1 [file2] [...]


#
# File: StringIO-tarfile.py
#
#!/usr/bin/env python

from StringIO import StringIO
import tarfile
import sys

def create_tar_file(filenames, fileobj, mode, result_cb=lambda f:
None):
	tar_file = tarfile.open(mode=mode, fileobj=fileobj)
	for f in filenames:
		tar_file.add(f)
	result = result_cb(fileobj)
	tar_file.close()
	return result

if __name__ == '__main__':
	files = sys.argv[1:]
	modes = ['w%s%s' % (x, y)for x in (':', '|') for y in ('', 'gz',
'bz2')]

	string_io_cb = lambda f: f.getvalue()

	for mode in modes:
		ext = mode.replace('w|', '-pipe.tar.').replace('w:',
'.tar.').rstrip('.')
		# StringIO test.
		content = create_tar_file(files, StringIO(), mode, string_io_cb)
		fd = open('StringIO%s' % ext, 'w')
		fd.write(content)
		fd.close()

		# file object test.
		fd = open('file%s' % ext, 'w')
		create_tar_file(files, fd, mode)


As test input, I have used a directory with a single text file. As you
can see below, any tests using plain file objects were successful. But
when using StringIO, I can only create uncompressed tar files. Even
though I don't get any errors when creating them most of the files are
just empty or truncated.


$ for f in `ls *.tar{,.gz,.bz2}`; do echo -n $f; du -h $f | awk
'{print " ("$1"B)"}'; tar -tf $f; echo; done

file-pipe.tar (84KB)
foo/
foo/ksp-fosdem2008.txt

file-pipe.tar.bz2 (20KB)
foo/
foo/ksp-fosdem2008.txt

file-pipe.tar.gz (20KB)
foo/
foo/ksp-fosdem2008.txt

file.tar (84KB)
foo/
foo/ksp-fosdem2008.txt

file.tar.bz2 (20KB)
foo/
foo/ksp-fosdem2008.txt

file.tar.gz (20KB)
foo/
foo/ksp-fosdem2008.txt

StringIO-pipe.tar (76KB)
foo/
foo/ksp-fosdem2008.txt
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now

StringIO-pipe.tar.bz2 (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO-pipe.tar.gz (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO.tar (76KB)
foo/
foo/ksp-fosdem2008.txt

StringIO.tar.bz2 (0B)
tar: This does not look like a tar archive
tar: Error exit delayed from previous errors

StringIO.tar.gz (4.0KB)

gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error exit delayed from previous errors


Can somebody reproduce this problem? Did I misunderstood the API? What
would be the best work around, if I am right? I am thinking about
using the gzip and bz2 module directly.

Regards
Sebastian Noack


From upton at virginia.edu  Mon May 12 23:19:55 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 12 May 2008 23:19:55 -0400
Subject: how to get information of a running prog in python
In-Reply-To: <58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
References: <8b571818-25f0-4c5d-8b1c-5b7e73192d15@w5g2000prd.googlegroups.com>
	<mailman.1013.1210646225.12834.python-list@python.org>
	<58a5cb5c-5c10-43a3-bff0-58fa3c213a80@i36g2000prf.googlegroups.com>
Message-ID: <5504f9ac0805122019yc3845fcn63ea3d842b82fd29@mail.gmail.com>

On Mon, May 12, 2008 at 11:02 PM, Jimmy <mcknight0219 at gmail.com> wrote:
> On May 13, 10:36 am, "Dan Upton" <up... at virginia.edu> wrote:
>
>
> > On Mon, May 12, 2008 at 10:19 PM, Jimmy <mcknight0... at gmail.com> wrote:
>  > > Well, i know it may be a little non-python thing, however, I can think
>  > >  of no place better to post this question :)
>  >
>  > >  can anyone tell me, in python, how to obtain some information of a
>  > >  running program?
>  > >  paticularly, if i am playing some music in audacious or other media
>  > >  player, how can i get the the name and some other info of current
>  > >  playing song? It seems that audicious doesn't output on run-time
>  > >  --
>  > >  http://mail.python.org/mailman/listinfo/python-list
>  >
>
> > In most cases, you'll probably need some sort of API, either in the
>  > program itself or through some sort of plugin, that lets external
>  > programs query it.  For instance, there are some plugins to WinAmp
>  > that allow external programs (like Last.FM or Mog-O-Matic) to see what
>  > track is currently playing.  You may also be able to do something like
>  > get the window title (again, WinAmp's title bar usually includes the
>  > artist and title) and parse it out.  I don't really know that there's
>  > anything specific to Python for accessing these though, and it may
>  > vary depending on media player.
>  >
>  > Just my two cents...
>  >
>  > -dan
>
>  thanks!
>
>  In linux, I am always obfuscated by sort of APIs. Like how to get
>  title information of a running program?
>  where am I supposed to find these APIs
>

In the documentation for each application?  Somebody a little more
familiar with the specific apps you're interested in might be able to
help you more, especially in the case of open-source programs that
usually have developer communities.  Also, you can find some
information (although I don't know that it'll be enough to help you)
in files in /proc/$pid on Linux -- type 'man proc' in your shell to
see what you can get out of it and if anything looks helpful for you.


From jcd at sdf.lonestar.org  Thu May 29 11:59:07 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 29 May 2008 11:59:07 -0400
Subject: [OT] Re: FW: php vs python
In-Reply-To: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>
References: <B035EC673DDD3A4D944E9171E0A3F5842D8B3A@srvr01.aspex.co.nz.local>
Message-ID: <1212076747.13017.20.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-29 at 08:47 +1200, Phil Runciman wrote:
> The Inuit have 13 terms for snow. Microsoft advocate DSLs. Why have
> DSLs
> if language does not matter?
> 

For that matter, the English have several terms for snow as well.

snow
flurry
blizzard
powder
pack
flakes
crystals
sleet
slush

And in some contexts (http://www.abc-of-snowboarding.com/snowtypes.asp)

crud
crust
rime
graupel
hail

That's 14.  Inuits are unimaginative punks. ;)

Cheers,
Cliff



From ruoyu0088 at gmail.com  Fri May 30 21:21:43 2008
From: ruoyu0088 at gmail.com (HYRY)
Date: Fri, 30 May 2008 18:21:43 -0700 (PDT)
Subject: How to add function return value
Message-ID: <28e0c835-4ed7-4571-ab69-a90cec4efc08@f24g2000prh.googlegroups.com>

I need to write functions that return locals() as follows,
def func1():
    a = 1
    return locals()

def func2():
    b = 2
    return locals()

Can I write a decorator that it can automately do this conversion

def func1()
    a = 1

--->

def func1():
    a = 1
    return locals()



From bruno.desthuilliers at gmail.com  Fri May 16 17:08:28 2008
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: Fri, 16 May 2008 14:08:28 -0700 (PDT)
Subject: namespaces and eval
References: <aeb28cc7-4eb1-4636-9833-678fb4df091b@y18g2000pre.googlegroups.com>
Message-ID: <dddb3963-fc71-4484-a4fe-49892f2eea98@w7g2000hsa.googlegroups.com>

On 16 mai, 20:44, dave.g1... at gmail.com wrote:
> Suppose I have a function in module X that calls eval e.g,
>
> X.py
> _______
> Def foo(bar):
>         Eval(bar)
> _______
>
> Now eval will be called using the default eval(bar,globals(),locals())
> and globals will pull in anything in module X.
>
> Now I have module Y that calls bar like so
> Y.py
> ________
> from x import *
> def biz():
>         print "Im a silly example!"
> Foo("biz()")
> _______
>
> Python will complain that it cannot find biz because it's not the X
> module.

I'm afraid you're using the wrong tool here. Just try this:

# module x
def foo(bar):
    bar()

# module y
from x import foo
def baaz():
    print "in y.baaz"

foo(baaz)

Remember that in Python, everything (at least, everything you can bind
to a nme) is an object, including functions, classes and modules. And
that every name lives in a namespace, that can be inspected somehow
(using globals() and locals(), but also using getattr() or some
function from the inspect module). IOW, when you think that eval() (or
exec()) is what you need, odds are there's a way better solution.
FWIW, I must have used exec twice and eval thrice in 7+ years of
Python programming - and believe me, I'm not afraid of wizardry and
black magic.




From stevegill7 at gmail.com  Fri May  2 07:14:47 2008
From: stevegill7 at gmail.com (Jetus)
Date: Fri, 2 May 2008 04:14:47 -0700 (PDT)
Subject: creating a list from a inconsistent text file
Message-ID: <fccac702-6e8d-4275-8ae5-9f2f48983934@m36g2000hse.googlegroups.com>

I have a comma delimited file that is separated by comma's, and then
sometimes by ","

c:\temp\05-06-08\Sale1,659 CECIL,"659 CECIL,40211",
1,659,CECIL,AVENUE,LOUISVILLE,40211,"$65,276.78 "
c:\temp\05-06-08\Sale2,637 SOUTH 27TH,"637 SOUTH 27TH,40211",
2,637,SOUTH 27TH,STREET,LOUISVILLE,40211,"$45,456.95 "
c:\temp\05-06-08\Sale3,2709 ELLIOT,"2709 ELLIOT,40211",
3,2709,ELLIOT,AVENUE,LOUISVILLE,40211,"$49,349.66 "


I would like to pick out data in a particular column. So am I right in
thinking that I would need to covert each line into a list, then
choose the appropriate column via a index?

How do I convert that line into a list?


From deets at nospam.web.de  Thu May 22 09:16:55 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 15:16:55 +0200
Subject: merging the global namespaces of two modules
References: <mailman.1469.1211449697.12834.python-list@python.org>
	<cff4a5b3-136f-42ee-bd85-f435e2dded0e@d45g2000hsc.googlegroups.com>
	<mailman.1471.1211460556.12834.python-list@python.org>
Message-ID: <69la34F33541cU1@mid.uni-berlin.de>

Fabrizio Pollastri wrote:

> Jeff wrote:
>> Can you be more specific?  modA and modB don't import from each other
>> but both need to access objects in the global namespace of what
>> module?  The controlling application?
> 
>> Or do you mean that, for
>> example, modA needs to access some functions in modB, but does not
>> have import statements to do so, and you want the controlling program
>> to do the imports for it?
> 
> Exactly this.
> 
>> If that is the case, that is bad
>> programming practice in Python.  Python is not C and you can't just
>> share header files :)
> 
> Ok. I know that I want a python import to behave like a C include, it is
> so bad?
> 
> The motivation arise from a family of applications that import, among
> others, two modules: a basic one and a specific one. The specific one is
> chosen from a set of modules at import time depending on other imported
> modules, so the basic module can known its external references against the
> specific module only at run time.
> 
> One solution can be:
> -the application imports the basic module,
> -the basic module selects the proper specific module among the allowable
> specific modules,
> -the basic module imports the selected module with an __import__ call
> equivalent to "import selected_module_X as select_module",
> -Any reference to the specific module in the basic module is written in
> the form "selected_module.object_name".
> 
> Any better solution?

http://peak.telecommunity.com/DevCenter/PkgResources#namespace-package-support

Diez


From stefan_ml at behnel.de  Wed May 28 15:54:33 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Wed, 28 May 2008 21:54:33 +0200
Subject: confused by HTMLParser class
In-Reply-To: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
References: <1fcb1289-94db-4f7f-9973-dbb63cad6d86@p25g2000hsf.googlegroups.com>
Message-ID: <483DB879.9010609@behnel.de>

globalrev wrote:
> tried all kinds of combos to get this to work.

In case you meant to say that you can't get it to work, consider using lxml
instead.

http://codespeak.net/lxml
http://codespeak.net/lxml/lxmlhtml.html

Stefan


From florian.herlings at googlemail.com  Sat May  3 07:08:53 2008
From: florian.herlings at googlemail.com (Florian Herlings)
Date: Sat, 3 May 2008 13:08:53 +0200
Subject: How to use a parameter in a class
In-Reply-To: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
References: <4923419b-4de0-4739-b02d-753636ef0220@y21g2000hsf.googlegroups.com>
Message-ID: <c1edf59a0805030408m31c63fecqebee47f5f47e28f4@mail.gmail.com>

Hello Decebal,

I am new to python myself, which might be the cause why I do not get
that "last line" at all. To me it looks like you are trying to set a
variable in the class body (if I am reading the indent correctly) and
call a function (that does not exist?) to calculate the value for it.
Does that work at all?

About a week ago I learned something, that might solve your problem:
You can only access the instance's variables from within a function.
The variable is not visible from the outside. To get that value (12 on
your example) you have to be in a function, or call your returnValue()
function from the outside.

I hope, that I did not waste your time with my lowest level knowledge.

Have a nice weekend,
Florian


On Sat, May 3, 2008 at 12:05 PM, Decebal <CLDWesterhof at gmail.com> wrote:
> I have the following class:
>  #####
>  class Dummy():
>     value = 0
>     def __init__(self, thisValue):
>         print thisValue
>         self.value = thisValue
>         value = thisValue
>
>     def testing(self):
>         print 'In test: %d' % self.value
>
>     def returnValue(self):
>         return self.value
>
>     result = someFuntion(default = value)
>  #####
>
>  But the last line does not work.
>  I would like to do a call like:
>     dummy = Dummy(thisValue = 12)
>
>  And that someFunction gets a default value of 12. How can I do that?
>  --
>  http://mail.python.org/mailman/listinfo/python-list
>


From cnshoes61 at yahoo.com.cn  Mon May 12 07:21:56 2008
From: cnshoes61 at yahoo.com.cn (cnshoes61 at yahoo.com.cn)
Date: Mon, 12 May 2008 04:21:56 -0700 (PDT)
Subject: CHINA WHOLESALE GUCCI PRADA SHOES, SNEAKERS, PURSE, SUNGLASSES,
	BESTS ETC
Message-ID: <903957d1-ec95-4a1f-a3c7-98a8e8ba4eae@k10g2000prm.googlegroups.com>

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From aguirre.adolfo at gmail.com  Sun May  4 20:18:40 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Sun, 4 May 2008 17:18:40 -0700 (PDT)
Subject: Numpy not found
Message-ID: <9d1d26d4-6351-4557-9834-fd51669858df@34g2000hsf.googlegroups.com>



I downloaded and installed Phyton 2.52 (it works), numpy-1.0.4.win32-
py2.5, and scipy-0.6.0.win32-py2.5

I can?t get Numpy to show up at Python?s  IDLE, or command line. If I
do:

>>>> import Numeric
# I get
>>>> Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import Numeric
ImportError: No module named Numeric

And if I do:
>>>> import Numeric *
# I get
SyntaxError: invalid syntax

I restarted the machine and double clicked in the same file
numpy-1.0.4.win32-py2.5 again, it asked whether I wanted to reinstall
or repair, I chose repair. I tried the same commands again after this
but I got the same results.

Next, I went o the Python25 "site packages"  subdirectory and there I
found "setup.py" and "readme.txt" files. I did  run the setup with no
changes and the readme file suggested to run the setup.py scrip. No
changes.

Any help with this mater will be much appreciated,

Adolfo






From frikker at gmail.com  Wed May 28 19:41:49 2008
From: frikker at gmail.com (blaine)
Date: Wed, 28 May 2008 16:41:49 -0700 (PDT)
Subject: Optimization: Picking random keys from a dictionary and mutating 
	values
Message-ID: <b9ff87b8-ea2c-4f30-b060-ca1a53f6495c@e39g2000hsf.googlegroups.com>

Hey everyone,
  Just a friendly question about an efficient way to do this.  I have
a graph with nodes and edges (networkx is am amazing library, check it
out!).  I also have a lookup table with weights of each edge.  So:

weights[(edge1, edge2)] = .12
weights[(edge2, edge5)] = .53
weights[(edge5, edge1)] = 1.23
weights[(edge3, edge2)] = -2.34
etc.

I would like to take this weight table and subject it to evolutionary
mutations.  So given a probability p (mutation rate), mutate edge
weights by some random value.   So in effect, if p is .25, choose 25%
random edges, and mutate them some amount.  So:
1.  Whats a good way to get the keys? I'm using a loop with
random.choice() at the moment.
2.  Any comments on how to get a 'fair' mutation on an existing edge
value?

I currently am doing something like this, which seems like it leaves
something to be desired.

import random
weights = generateweights() # generates table like the one above
p = 0.25
v = random.betavariate(2, 10)
num = int(v*len(weights)) # How many weights should we mutate?
keys = w.keys()
for i in xrange(num):
  val = random.choice(keys) # Choose a single random key
  w[val] = w[val]*(random.random()*5-1) # Is this a 'good' way to
'mutate' the value?

This is an evolutionary search, so mutate in this sense relates to a
genetic algorithm, perhaps a gradient decent?
Thanks!
Blaine


From bruno.42.desthuilliers at websiteburo.invalid  Tue May 13 10:15:58 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Tue, 13 May 2008 16:15:58 +0200
Subject: do you fail at FizzBuzz? simple prog test
In-Reply-To: <mailman.1007.1210634653.12834.python-list@python.org>
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>	<mailman.969.1210575642.12834.python-list@python.org>	<688a0f5a-2cdf-45ca-abe7-5bbb89aac32f@s50g2000hsb.googlegroups.com>
	<mailman.1007.1210634653.12834.python-list@python.org>
Message-ID: <4829a29d$0$11051$426a74cc@news.free.fr>

Kam-Hung Soh a ?crit :
> On Tue, 13 May 2008 03:42:30 +1000, bruno.desthuilliers at gmail.com 
> <bruno.desthuilliers at gmail.com> wrote:
> 
>> I just can't believe someone applying for a programmer position cannot
>> provide a sensible anwser in 5 or less minutes.
> 
> You should join the recruitment and interview panel in your organization 
> to test your faith.

I've done some recruitment - for a programmer position - in my previous 
shop , and none of the guys that we interwieved were *that* bad.


From cwitts at gmail.com  Thu May 29 05:02:31 2008
From: cwitts at gmail.com (Chris)
Date: Thu, 29 May 2008 02:02:31 -0700 (PDT)
Subject: Compare 2 files and discard common lines
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <b0fc1a8b-98c0-4bbf-9afb-cf5741eae1f6@t54g2000hsg.googlegroups.com>

On May 29, 10:36?am, loial <jldunn2... at googlemail.com> wrote:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?

How large are the files ? You could load up the smallest file into
memory then while iterating over the other one just do 'if line in
other_files_lines:' and do your processing from there.  By your
description it doesn't sound like you want to iterate over both files
simultaneously and do a line for line comparison because that would
mean if someone plonks an extra newline somewhere it wouldn't gel.


From paul at ulkarodgers.com  Thu May 29 19:50:20 2008
From: paul at ulkarodgers.com (paul at ulkarodgers.com)
Date: Thu, 29 May 2008 16:50:20 -0700 (PDT)
Subject: So you think PythonCard is old? Here's new wine in an old bottle.
References: <9028496e-30de-4853-8f57-b55d14e52358@h1g2000prh.googlegroups.com>
Message-ID: <4c2b01e4-10b3-455d-a29e-bc5bb31a8264@59g2000hsb.googlegroups.com>

Have you shown this stuff to the google AppEngine folks!
Thats being touted as the thing that'll make web-2 easy

but you have to write code (Python) which will turn off 99% of
possible users.

What made Hypercard really great  (and Supercard on DOS, and the new
clones like Revolution) is that it was a drag-n-drop GUI designer, it
"built-in" the data storage (persistence layer is what we call it now)
it was INTEGRATED, (you only had to get the one thing, not heinz-57-
bloody-pieces) and it used an easily-readable interpreted programming
language.

App-Engine has the persistence, and the integration, its missing the
others and without them it'll never be great.

call those guys, they need you!
I need your stuff on their infrastructure. THAT would be worth a case
of champagne.


From ivan.illarionov at gmail.com  Mon May 12 02:56:47 2008
From: ivan.illarionov at gmail.com (Ivan Illarionov)
Date: Mon, 12 May 2008 06:56:47 +0000 (UTC)
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<41078222-aec0-4e8b-8a1f-945cdf814498@m73g2000hsh.googlegroups.com>
	<48275446$0$11628$607ed4bc@cv.net> <87mymw8nr0.fsf@benfinney.id.au>
	<f754960d-e10b-44ce-bb0d-5ab98fafdfd0@m73g2000hsh.googlegroups.com>
	<g08jvd$2k0g$1@news.mtu.ru> <87iqxk6nvs.fsf@benfinney.id.au>
Message-ID: <g08pnf$2lbi$1@news.mtu.ru>

On Mon, 12 May 2008 16:24:23 +1000, Ben Finney wrote:
[...]
> That is also regrettably common in Python code. It still suffers from
> being unnecessarily ambiguous, since there are *also* plenty of loops
> using 'i', 'j', etc. where the loop counter *is* used.
> 
> Differentiating these use cases by appropriate naming is, IMO, worth the
> effort of choosing a meaningful name.

Even if the counter is not used inside the loop's body it's still in 
control of the whole loop and, IMO, any special discriminating and non-
conventional name doesn't worth the added confusion.

-- Ivan


From Lie.1296 at gmail.com  Fri May 16 15:06:22 2008
From: Lie.1296 at gmail.com (Lie)
Date: Fri, 16 May 2008 12:06:22 -0700 (PDT)
Subject: Scanning through Windows registry...
References: <e5043c51-76ef-43ea-b210-d2e05df01cae@a23g2000hsc.googlegroups.com>
	<mailman.645.1210074206.12834.python-list@python.org>
	<ce3c6e41-39ca-45fb-82dd-b6b1746eff09@j22g2000hsf.googlegroups.com>
	<mailman.653.1210080581.12834.python-list@python.org>
	<de9cb501-f7d6-42db-aac9-6e729980b179@x35g2000hsb.googlegroups.com>
	<48216129.5090405@timgolden.me.uk>
	<mailman.698.1210153360.12834.python-list@python.org> 
	<f3879599-5219-407b-a438-ad6530a05b27@d1g2000hsg.googlegroups.com> 
	<2f0e3ef0-c33d-4dc3-819e-1c78e5bccb31@8g2000hse.googlegroups.com> 
	<c31ca749-3085-4679-825f-3a9239b7f21a@l64g2000hse.googlegroups.com> 
	<3a2ea1ec-7fa1-4740-aefa-ff83807fc227@x35g2000hsb.googlegroups.com>
Message-ID: <6895c7ef-7886-4cf4-b558-a869a4bb9d06@z24g2000prf.googlegroups.com>

On May 9, 7:36?pm, Unknown Hero <unknown_hero... at hotmail.com> wrote:
> Ah, never mind, got it to work. Here's the code now. I hope I won't
> run into another problems later :D
>
> <code snippet>
> #Goes through all keys and subkeys in the selected hive (defined as
> root) and replaces the value 'old' with the value 'new'
> #
> #IMPORTANT! You should always back up the registry before attempting
> to modify it.
> #The author of this script CANNOT BE HELD RESPONSIVE for any damage
> caused by running this script.
(snip)

One thing though, the disclaimer should not said the author cannot be
held responsive, or you would be Windows that is not responsive all
the times. I think it should say "responsible".

I'm quite confused though, the code could be made simpler by dozens
using Python's high-level functionalities. Particularly the lengthy
code that checked whether the string contained a substring and replace
the substring with new could be done easily (and faster) using
python's in and replace function. I'll post the code later when I
finished checking places where the codes could be simplified, and I'll
also polish the entry code and a few other things (and pythonify the
code according to the PEP 8's guide lines).


From dannywebster at googlemail.com  Tue May 13 06:28:03 2008
From: dannywebster at googlemail.com (dannywebster at googlemail.com)
Date: Tue, 13 May 2008 03:28:03 -0700 (PDT)
Subject: Best way to delimit a list?
Message-ID: <57129f75-b496-40fc-8b2d-d93ba544d4c5@u6g2000prc.googlegroups.com>

Hi - I have a list returned from popen/readlines, and am wondering how
to go about iterating over each item which was returned (rather than
currently having the whole lot returned).

so far:

>>> f=os.open("./get_hostnames").readlines

returns ['host1 host2 host3 ... hostN\n]'

i'd like to be in a position to iterate through these, grabbing each
host.  I have played with transmuting to a str, and using split, and
this works, but I get the subscript brackets from the list output as
expected, as the list output is now a string literal, and this is not
what I want - and I think it's a bit long-winded to do a search 'n
replace on it - hence why I ask in the subject what's the best way.

>>> f=str(f)
>>> f.split()
["['host1","host2", ... ,"hostN\n']"]


Any help is highly appreciated

ta

dan.


From zerge69 at gmail.com  Sun May 25 02:00:31 2008
From: zerge69 at gmail.com (Zerge)
Date: Sat, 24 May 2008 23:00:31 -0700 (PDT)
Subject: True random number generator
Message-ID: <fc07a939-0c86-4f3d-912a-1b650939c578@j1g2000prb.googlegroups.com>

truerandom.py is a Python module that generates true random numbers
obtained from www.random.org.

Use with the form: mylist=truerandom.getnum(min,max,amount)

mylist will be a list containing the true random numbers.

If for some reason the numbers cannot be generated, the list will
contain -1.

You can download it here:
http://code.google.com/p/truerandom/


From castironpi at gmail.com  Thu May  8 20:07:15 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Thu, 8 May 2008 17:07:15 -0700 (PDT)
Subject: Python GUIs and custom controls
References: <049d1607-c578-48dc-83f3-42cf562449b4@p25g2000hsf.googlegroups.com>
	<mailman.811.1210282241.12834.python-list@python.org>
Message-ID: <d2f81c2a-7b87-4dbe-98f1-ee1d8f7e98cc@i76g2000hsf.googlegroups.com>

On May 8, 4:30?pm, "Chuckk Hubbard" <badmuthahubb... at gmail.com> wrote:
> I likewise don't know enough to compare between toolkits, but another
> one to check out might be pygame. ?If nothing else, it is meant to be
> fast and to handle 3D views.
>
> -Chuckk
>
> On Fri, May 9, 2008 at 12:10 AM, Joe P. Cool <joe.p.c... at googlemail.com> wrote:
>
> > So far I have a little experience with Tkinter and wxPython. I wonder
> > which of the numerous Python GUI kits would be the best choice for a
> > multi platform application that makes heavy use of custom controls, 3D
> > views and the like? Thanks in advance for your hints and advice.
>
> > Joe
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> --http://www.badmuthahubbard.com

I am not holding that programming is profitable (or even a good
experience) without a community to talk to.  If a computer is a
generic man-borne tool, true currency (time) will answer to it as a
tool.

Do note that money tracks experience.  If you're not having a good
experience, back up a step, and have fun with your hands.  Thus*, I
think sound and OS-band controls would be the funnest to start long
threads about.  Just names have to run: fly or float.

*Money floats off its gold standard.  What sounds float, and does
everyone use the Microsoft-103 Dell-brand 15" laptop?  What, not
everyone?

I have been having problems with feedback-buffers in sound files.
Here's a particularly pleasing grid in intervals, and even progressing
chromaticly.

prog= [
( 1, 5, 8 ),
( 1, 5, 10 ),
( 1, 6, 10 ),
( 3, 6, 10 ),
( 3, 6, 12 ),
( 3, 8, 12 ),
( 5, 8, 13 )
]

for i, key in enumerate( 'C2 C#2 D2 D#2 E2 F2 F#2 G2 G#2 A2 A#2 B2
C3'.split( ) ):
...
    snd.play( )

How fast can the drives act to the mouse, and what keys do you want on
your organ?

Att: cough4.wav


From wizzardx at gmail.com  Sun May  4 05:14:59 2008
From: wizzardx at gmail.com (David)
Date: Sun, 4 May 2008 11:14:59 +0200
Subject: using sqlite3 - execute vs. executemany; committing ...
In-Reply-To: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
References: <9fdb569a0805031431r6666e950pc6dbc8aab6e36684@mail.gmail.com>
Message-ID: <18c1e6480805040214m5ecd0b27t9800bfc4a39daec8@mail.gmail.com>

> - Are there any peculiarities with using curs.executemany(...) vs. multiple
> curs.execute(...) ? I read a notice, sqlite3 does internally some caching,
> hence both should be similarly fast, but in my case executemany(...) is
> quite a bit faster

How many times are you calling execute vs a single executemany? The
python call overhead will add up for thousands of calls.

The relevant source code is here if you're interested:

http://svn.python.org/projects/python/trunk/Modules/_sqlite/cursor.c

>  Further, I am not quite sure about the standard usage of the cursor object
> and also the proper commiting the transactions and closing the connection.

Standard usage is here:

http://docs.python.org/lib/module-sqlite3.html

If the database supports transactions then cursors automatically use
transactions. Your changes only get committed when you call .commit().
Otherwise your changes are lost.

In the specific case of sqllite, some statements (like CREATE TABLE,
ALTER TABLE, etc) also cause a commit. This is probably where your
confusion comes from. Since this isn't part of the python DB API spec
(http://www.python.org/dev/peps/pep-0249/) I wouldn't rely on it.
Otherwise you will have problems with other databases.

Also, in your specific case you're using an 'in memory' sqllite db. So
there are less concerns with losing data between db sessions, etc. But
with most databases (on disk, running across the network on a server)
this becomes important.

>  Should one create a cursor of a connection and call the execute ... methods
> of the cursor -
>  or is it better to call the shortcut execute etc. methods of the Connection
> object directly (as suggested in the docs:
> http://docs.python.org/lib/node351.html (or are there specific use cases for
> both approaches)?

I suggest that you use the standard cursor methods instead, so you can
run your code against non-sqllite databases.  The performance etc
should be the same as using the direct method. Like the page says,
it's main benefit is consiseness.

>
> When the transactions should be commited? (creating, altering a table, or
> also selecting the results ?)
>  There seem to be some implicit handling of the transactions (
> http://docs.python.org/lib/sqlite3-Controlling-Transactions.html#sqlite3-Controlling-Transactions
> ); hence I am not sure about the standard usage of these methods; the same
> is true of connection.close() - or are these calls eventually unnecessary?

As a general rule, always use .commit() and .close(). Otherwise:

- No .commit() - you will lose db changes since the last commit or
"non-DML, non-query statement" (in the case of sqllite)
- No .close() - Your database connection will only close when your db
objects are garbage collected.

> conn_tags_DB = sqlite3.connect(':memory:')
>  curs = self.conn_tags_DB.cursor()
>  curs.execute('CREATE TABLE IF NOT EXISTS "%s" ("%s", UNIQUE("%s"))' %
> (self.text_name, index_col_name, index_col_name))
>  curs.execute(u'INSERT OR REPLACE INTO "%s"("%s") VALUES (?)' %
> (self.text_name, index_col_name), (0,))
>  for new_col in act_db_columns[1:]: # adds the needed columns (except of the
> first one: index_col_name)
>      curs.execute('ALTER TABLE "%s" ADD "%s" TEXT' % (self.text_name,
> new_col))
>  curs.executemany('INSERT OR REPLACE INTO "%s" VALUES (%s)' %
> (self.text_name, question_marks), tags_seq)
>  self.conn_tags_DB.commit()
>
> Are there maybe any comments or hints on a more elegant/efficient solution?
>

I think that dynamically creating schema (tables, based on text file
structure is a bad idea. A few reasons:

- This forces you to dynamically generate all your queries dynamically
- Not all strings are valid table/column names
- This forces the app to run as database administrator (maybe not
important for sqllite, but definitely an issue if you change to
another dbm).
- Potentially huge stability/security problems - text files can
potentially break system tables, overwrite users, etc, etc.

You're violating several rules on db design/usage.

I strongly recommend that you use a better database logic. ie, create
tables and records in advance (setup script, as db admin user if
applicable), then only use delete/insert/update/select statements (as
restricted user, if applicable).

If this is too much trouble, then I suggest storing your database in
regular Python structures instead, and use pickle/yaml/etc to write to
disk. Your current version uses a 'in memory' database, so the end
result is the same. You'll get a large performance boost also.

> Now, what's the usual way to access the database? Is it
> possible/wise/standard ... to leave the connection open for the subsequent
> queries during the whole run of the app; could even the cursor eventually be
> present as a class method, or should it rather be created repeatedly with
> each call?  (After populating, the db shouldn't be modified, but only read.)

It depends. If your app is simple, single threaded, then a single
connection (global or passed through args) should be fine. Only use
multiple cursors if you need them (multiple threads, multiple
databases, multiple transaction/db isolation levels, etc).

David.


From mediocre_person at hotmail.com  Fri May  2 14:58:29 2008
From: mediocre_person at hotmail.com (Nick J Chackowsky)
Date: Fri, 02 May 2008 13:58:29 -0500
Subject: list.index crashes when the element is not found
In-Reply-To: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
Message-ID: <491f6$481b6455$547@news.teranews.com>

TkNeo wrote:
> WHAT ?
> 
> This is crazy

Crazy like a fox?

a = [1, 2, 3]
try:
     a.index(99)
except:
     a.append(99)
finally:
     print a.index(99)

MY question: which exception should I actually be catching there?
** Posted from http://www.teranews.com **


From gagsl-py2 at yahoo.com.ar  Fri May  2 15:02:15 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 02 May 2008 16:02:15 -0300
Subject: list.index crashes when the element is not found
References: <b679107b-8236-47bb-91a6-d353cd5620a0@26g2000hsk.googlegroups.com>
Message-ID: <op.uaji512bx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 May 2008 15:25:13 -0300, TkNeo <tarun.kap at gmail.com> escribi?:

> WHAT ?
>
> This is crazy

crashes? Or raises a ValueError exception, which is perfectly normal?

-- 
Gabriel Genellina



From jzgoda at o2.usun.pl  Sat May 24 08:18:13 2008
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 24 May 2008 14:18:13 +0200
Subject: Assignment and comparison in one statement
In-Reply-To: <esujg5x5u5.ln2@joeserver.homelan.net>
References: <esujg5x5u5.ln2@joeserver.homelan.net>
Message-ID: <g191f8$nn7$1@nemesis.news.neostrada.pl>

Johannes Bauer pisze:

> I'm just starting with Python and am extremely unexperienced with it so
> far. Having a strong C/C++ background, I wish to do something like
> 
> if (q = getchar()) {
>     printf("%d\n", q);
> }
> 
> or translated to Python:
> 
> if (p = myfunction()):
>     print p
> 
> However, this "assignment and comparison" is not working. What's the
> "Python way" of doing this kind of thing?

Assignment operation (or, as we prefer calling: "binding value to name")
has no boolean value, because it succeeds always. While call to
myfunction can return any value, binding it to name p has no value at all.

Tell us your objective, so we could show you "proper way" (tm). ;)

-- 
Jarek Zgoda
http://zgodowie.org/

"We read Knuth so you don't have to" - Tim Peters


From Lie.1296 at gmail.com  Wed May 14 02:04:45 2008
From: Lie.1296 at gmail.com (Lie)
Date: Tue, 13 May 2008 23:04:45 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com> 
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com> 
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com> 
	<mailman.1056.1210693836.12834.python-list@python.org>
	<bf75da43-1163-4001-bc0c-7d8faed7b258@p25g2000pri.googlegroups.com>
	<mdOdnfgVSIsm9LfVnZ2dnUVZ_h3inZ2d@earthlink.com>
Message-ID: <141deef4-54dc-48fb-9f7c-d8ed1578b0e9@x19g2000prg.googlegroups.com>

On May 14, 11:25?am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Tue, 13 May 2008 09:36:28 -0700 (PDT), Dave Parker
> <davepar... at flamingthunder.com> declaimed the following in
> comp.lang.python:
>
> > > ... there's something that feels very unnatural about writing English as code.
>
> > I think it is ironic that you think Flaming Thunder is unnatural
> > because it is more English-like, when being English-like was one of
> > Python's goals: "Python was designed to be a highly readable language.
> > It aims toward an uncluttered visual layout, using English keywords
> > frequently where other languages use punctuation."
> >http://en.wikipedia.org/wiki/Python_(programming_language)#Syntax_and...
>
> ? ? ? ? I'd consider the emphasis to be "keywords ... punctuation", whereas
> "English" is just a qualifier...
>
> ? ? ? ? If you want to follow this to the limit, the ^ vs ** would
> disappear...
>
> ? ? ? ? let x be y raised to z

I'm doubting that anyone would rely on a natural language programming
language written by someone who has misunderstood other's post 3-4
times, and have misquoted news story several times because of his
misunderstanding. If he can't even understand English text properly,
how could he write a natural language parser?


From wxPythoner at gmail.com  Tue May 13 06:25:06 2008
From: wxPythoner at gmail.com (wxPythoner at gmail.com)
Date: Tue, 13 May 2008 03:25:06 -0700 (PDT)
Subject: Backslash frowned upon?
Message-ID: <230658ee-4b4e-48e7-b06a-88af33a5167c@25g2000hsx.googlegroups.com>

Why is the  \  backslash character frowned upon? Can I still use it in
Python 3.0 to achieve the same thing it was designed to do?


From fiacre.patrick at gmail.com  Fri May 23 07:20:21 2008
From: fiacre.patrick at gmail.com (Andrew Lee)
Date: Fri, 23 May 2008 07:20:21 -0400
Subject: can python do some kernel stuff?
In-Reply-To: <69nls3F344g2cU1@mid.uni-berlin.de>
References: <983ec0f6-1316-40cd-a4d4-ce9b5e272a60@h1g2000prh.googlegroups.com>
	<48366cfa$0$15168$607ed4bc@cv.net>
	<28c432f0-657c-4272-8cd4-a9081b013279@w5g2000prd.googlegroups.com>
	<69nigsF3499pqU2@mid.uni-berlin.de>
	<4836994e$0$11625$607ed4bc@cv.net>
	<69nls3F344g2cU1@mid.uni-berlin.de>
Message-ID: <4836a876$0$11623$607ed4bc@cv.net>

Diez B. Roggisch wrote:
> Andrew Lee schrieb:
>> Diez B. Roggisch wrote:
>>> Jimmy schrieb:
>>>> On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
>>>>> Jimmy wrote:
>>>>>> Hi to all
>>>>>> python now has grown to a versatile language that can
>>>>>> accomplish tasks for many different purposes. However,
>>>>>> AFAIK, little is known about its ability of kernel coding.
>>>>>> So I am wondering if python can do some kernel coding that
>>>>>> used to be the private garden of C/C++. For example, can python
>>>>>> intercept the input of keyboard on a system level? someone told me
>>>>>> it's a kernel thing, isn't it?
>>>>> http://wiki.python.org/moin/elmer
>>>>
>>>> well, straightly speaking, how can I know a key is pressed on a system-
>>>> level if
>>>> using python?
>>>
>>> What has that todo with kernel programming? You can use e.g. pygame 
>>> to get keystrokes. Or under linux, read (if you are root) the 
>>> keyboard input file - I've done that to support several keyboards 
>>> attached to a machine.
>>>
>>> And the original question: no, python can't be used as kernel 
>>> programming language. Amongst other reasons, performance & the GIL 
>>> prevent that.
>>>
>>> Diez
>>
>> http://www.kernel-panic.it/programming/py-pf/
>>
>> Of course you can code kernel routines in Python -- you are just 
>> calling the underlying C interface.  The GIL means you have to manage 
>> threadsafety on your own -- it doesn't imply kernel programming can 
>> not be done.
> 
> I understood the OP's question as "can one program kernelspace routines 
> in python". Which I don't think is possible. And I don't see how py-pf 
> does that either.
> 
> Diez


OP: "I am wondering if python can do some kernel coding that
used to be the private garden of C/C++."

The answer is yes.  IPC and py-pf are examples.  If you don't think of 
packet filtering as kernel coding, I can understand.  But clearly the 
Python interfaces to fork(), waitpid(), signal(), alarm() and so forth 
are forays into the once private garden of C.


From notnorwegian at yahoo.se  Mon May 26 21:03:14 2008
From: notnorwegian at yahoo.se (notnorwegian at yahoo.se)
Date: Mon, 26 May 2008 18:03:14 -0700 (PDT)
Subject: python raycaster, pycaster, where?
References: <1e8fccc5-21d1-4194-95ff-7f57939f184c@c58g2000hsc.googlegroups.com>
	<mailman.1627.1211837219.12834.python-list@python.org>
Message-ID: <0a414718-cf1b-40fd-8abb-8c4a3e51c743@8g2000hse.googlegroups.com>

On 26 Maj, 23:26, "Dan Upton" <up... at virginia.edu> wrote:
> On Mon, May 26, 2008 at 4:52 PM,  <notnorweg... at yahoo.se> wrote:
> > i tried googling this thing but couldnt find it. i cant find it in
> > pyagme either.
>
> Really?
>
> http://www.google.com/search?q=pycaster
>
> The first link has downloads for it.

quite funny, the first post returns this posted on another forum ...
and then the same links again.

clicking any of the links that dont lead here ar eeither outdated or
broken.


From dickinsm at gmail.com  Thu May 22 11:26:09 2008
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 22 May 2008 08:26:09 -0700 (PDT)
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com> 
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<mailman.1452.1211404691.12834.python-list@python.org>
	<6e4549da-6493-4be5-9ac0-945dd7cca323@q27g2000prf.googlegroups.com>
	<mailman.1454.1211406085.12834.python-list@python.org>
	<f8cdce91-e255-474e-adb1-b7b7a14aeaa5@b5g2000pri.googlegroups.com>
	<69l1teF33eaduU1@mid.uni-berlin.de>
Message-ID: <b504af34-168e-42a8-b5cd-4a03ff8571c4@m3g2000hsc.googlegroups.com>

On May 22, 6:57?am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >
> I wonder how you would accomplish that, given that there is no fix.
>
> http://hal.archives-ouvertes.fr/hal-00128124
>
> Diez

For anyone still following the discussion, I highly
recommend the above mentioned paper;  I found it
extremely helpful.

http://bugs.python.org/issue2937

Mark


From venkat83 at gmail.com  Fri May 16 02:38:21 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Thu, 15 May 2008 23:38:21 -0700 (PDT)
Subject: managing properties/configurations
References: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>
Message-ID: <9976ee1f-1d37-4252-802a-8dd3c3de7d3d@k1g2000prb.googlegroups.com>

Or a better example would be:

I have the params in a config file and import this module:
myconfig.py
a=10
b=30
c=31
d=40

import myconfig
def checkCutoff(self,up,down):
       .............do some processing........
       if (a <= score <= b):
                result="Bad"
       elif (c <= score <= d):
                result="Good"
       .............do some processing........
       return result

Now when i 'manually' make some changes to the value of a,b,c,d then
the the checkCutoff func should refer to the new values.

-Venkat


From gnewsg at gmail.com  Wed May 21 20:10:03 2008
From: gnewsg at gmail.com (Giampaolo Rodola')
Date: Wed, 21 May 2008 17:10:03 -0700 (PDT)
Subject: simple way to touch a file if it does not exist
References: <g12aee$jss$1@registered.motzarella.org>
Message-ID: <ea677d2e-9c44-431b-805c-4eea817cb539@w7g2000hsa.googlegroups.com>

On 22 Mag, 01:15, Nikhil <mnik... at gmail.com> wrote:
> what are the simple ways?
> I could think of os.open(), os.exec(touch file)
>
> are there any simpler methods?

Just use os.path.exists to check for file existence and open() as
replacement for touch.

>>> import os
>>> if not os.path.exists('file'):
...     open('file', 'w').close()
...
>>>


--- Giampaolo
http://code.google.com/p/pyftpdlib/


From bronger at physik.rwth-aachen.de  Sat May  3 17:27:08 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 03 May 2008 23:27:08 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
	<481CB283.107@gmail.com>
	<8oudncYY4Mi1SoHVnZ2dnUVZ_rzinZ2d@speakeasy.net>
Message-ID: <87fxszrscz.fsf@physik.rwth-aachen.de>

Hall?chen!

Erik Max Francis writes:

> Szabolcs Horv?t wrote:
>
>> Arnaud Delobelle wrote:
>>>
>>> sum() works for any sequence of objects with an __add__ method, not
>>> just floats!  Your algorithm is specific to floats.
>>
>> This occurred to me also, but then I tried
>>
>> sum(['abc', 'efg'], '')
>>
>> and it did not work.  Or is this just a special exception to
>> prevent the  misuse of sum to join strings?  (As I said, I'm only
>> an occasional user.)
>
> What you wrote is nonsensical there, no different from 'a' + 1 --
> which is why it quite rightly raises a TypeError.

No, the above expression should yield ''+'abc'+'efg', look for the
signature of sum in the docs.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From upton at virginia.edu  Mon May 26 22:58:30 2008
From: upton at virginia.edu (Dan Upton)
Date: Mon, 26 May 2008 22:58:30 -0400
Subject: sort list doesnt work, key=str still doesnt work
In-Reply-To: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
References: <c8c934b9-e6fc-47a9-95c0-73a6ae402934@x35g2000hsb.googlegroups.com>
Message-ID: <5504f9ac0805261958g2c773072pdb5ecc72366d47fd@mail.gmail.com>

On Mon, May 26, 2008 at 10:46 PM,  <notnorwegian at yahoo.se> wrote:
>>>> x
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>>>> x=sorted([',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse', 'clever', 'handsome'], key=str)
>>>> x
> [',', ',', 'CHAPTER', 'Emma', 'I', 'I', 'VOLUME', 'Woodhouse',
> 'clever', 'handsome']
>>>>
>
> what do i need to do?
> --
> http://mail.python.org/mailman/listinfo/python-list
>

That's correct behavior for what you gave it.  Example from
http://www.python.org/doc/2.4.3/whatsnew/node12.html :

>>> sorted('Monty Python')          # any iterable may be an input
[' ', 'M', 'P', 'h', 'n', 'n', 'o', 'o', 't', 't', 'y', 'y']

It looks like it's sorting based on ASCII value which means all upper
case letters come before any lower case letter.


From roy at panix.com  Sat May 24 09:12:23 2008
From: roy at panix.com (Roy Smith)
Date: Sat, 24 May 2008 09:12:23 -0400
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<84ff733a-e364-437d-9b5d-d8bb14cc692d@m73g2000hsh.googlegroups.com>
Message-ID: <roy-2863AB.09122324052008@70-1-84-166.area1.spcsdns.net>

In article 
<84ff733a-e364-437d-9b5d-d8bb14cc692d at m73g2000hsh.googlegroups.com>,
 John Roth <johnroth1 at gmail.com> wrote:

> > Does the following patch has a chance of being introduced in the
> > standard python distribution?
> 
> I certainly hope not!

I think you're being overly negative here.  Antoon went to the trouble to 
read the sources and post a diff.  At the very least, he deserves a more 
polite response.

But, more than that, I think Antoon's idea has some merit.  I understand 
that the mantra in unit testing is that the tests should be able to be run 
in any order.  Still, it's the job of a library package to make it easy to 
do things, not to enforce policy.  If somebody (for whatever reason) has a 
need to run their tests in a certain order, why is it our job to make it 
hard for them to do that?

In fact, unittest.defaultTestLoader *already* sorts the tests into 
alphabetical order by their name.  So, if somebody wanted to get the tests 
run in order, they could just name their tests "test0001", "test0002", etc.  
In fact, I've done that in the past when I had some (long forgotten) reason 
why I wanted to run a bunch of things in order.  Allowing the tests to be 
sorted by line number order instead of by name just makes it a little 
easier to do the same thing.

If somebody wants that functionality, and is willing to put in the effort 
to write the code to do it, and contribute that back to the community, I 
don't see any reason why it shouldn't be considered.  It would have to be 
done in a way that doesn't change the current behavior (perhaps by shipping 
a subclass of TestLoader which users could use instead of the default).  
I'm not saying that we *need* to include it, just that it's not such a bad 
idea that it deserves responses like "I certainly hope not!"


From kyosohma at gmail.com  Fri May 23 09:25:01 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Fri, 23 May 2008 06:25:01 -0700 (PDT)
Subject: Advice from senior Members
References: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>
Message-ID: <713f2757-a4f6-4685-834e-9f7502334da6@d45g2000hsc.googlegroups.com>

On May 23, 8:02?am, flit <superf... at gmail.com> wrote:
> Hello All,
>
> I am looking for some experience from the senior members.
> Now I am doing a simple desktop application, this application will
> have 3 main functions:
>
> 1- Read information about the desktop system;
> 2- Interact with the user;
> 3- Send information to a server.
>
> The first part, reading information about the desktop system, is
> already done.
> And now I am starting to make the gui for the user, that is when the
> question appear:
> "What is the best way to make it? divide in files? by classes or
> functions?"
> I have now one big file with all functions to get the desktop
> information.
> Should I make one file for the visual functions (wxpython)? another
> for the server?
> Is productive to divide in files? what is the best way?
>
> It seems like a naive question, maybe easy one, but I am willing to
> enjoy the experience from the most senior programmers here.
>
> Thanks

I would investigate the MVC (model-view-controller) architecture. That
is what wxPython advocates as does TurboGears and Django. The idea is
to keep your view (the GUI) separate from the logic (the controller)
and (I think) the model controls the data access.

Anyway, it's explained much better at these sites:

http://wiki.wxpython.org/ModelViewController
http://wiki.wxpython.org/wxPython%20Patterns
http://en.wikipedia.org/wiki/Model-view-controller

I try to keep my GUI code as decoupled from my logic code as possible.

Mike


From ryntech at gmail.com  Fri May  9 09:37:15 2008
From: ryntech at gmail.com (rynt)
Date: Fri, 9 May 2008 06:37:15 -0700 (PDT)
Subject: Web Framework suggestions for a RIA type application for managing lab
	specimens
Message-ID: <b6481874-b90a-414c-a707-06e71fb28516@w8g2000prd.googlegroups.com>

Hello all.

I'm Looking for suggestions for which Python web framework(e.g.
Django, Turbogears,etc.) would work best to develop a cross platform
browser based system to manage lab specimens.

Requirements are:
a. highly secure
b. run on internet or intranet
e. RDBMS read/write intensive
d. be able to work on-line or off-line (with automatic updates to db
when coming back on-line)
e. be able to print reports and labels using a variety of
printers(laser, deskjet, label printers)
f. have a rich set of desktop-like components

Perhaps a web based app isn't the way to go.  Arguments for and
against gratefully accepted.

Pros and Cons for any frameworks gratefully accepted.

Perhaps a framework isn't really what's needed here, but a combination
of different web components and technologies?

Anyway, I'm grateful for any ideas you may be able to give me.

Thanks
Ruben



From duncan.booth at invalid.invalid  Thu May 22 03:53:06 2008
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 May 2008 07:53:06 GMT
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<a9913f2d-0c1a-4492-bf58-5c78813c4458@s50g2000hsb.googlegroups.com>
	<Xns9AA6FDC59536mosornet@161.53.160.65>
	<a02e5269-63ba-4beb-b5b4-f484c7840130@m45g2000hsb.googlegroups.com>
Message-ID: <Xns9AA6596091F47duncanbooth@127.0.0.1>

bukzor <workitharder at gmail.com> wrote:

> On May 21, 4:33 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
>> Andr? <andre.robe... at gmail.com> wrote
>> innews:a9913f2d-0c1a-4492-bf58-5c7 
> 8813c4458 at s50g2000hsb.googlegroups.com:
>>
>> > How about something like the following (untested)
>>
>> > done = False
>> > while not done:
>> >   try:
>> >      some_function()
>> >      done = True
>> >   except:
>> >      some_function2()
>> >      some_function3()
>>
>> Sure, that works, but I was aiming for something more elegant and
>> Pythonic 

Catching only the specific exceptions you think you can handle would be 
more Pythonic: that way things like sys.exit() will still work inside 
some_function.

> 
> It's hard to get around a while loop if you want to conditionally
> repeat something. There's no built-in way to do what you ask.

I prefer a 'for' loop rather than 'while' so I can limit the number of 
retries.

The following may or may not be 'more pythonic', but is something I've 
used. It's a factory to generate decorators which will retry the 
decorated function. You have to specify the maximum number of retries, 
the exceptions which indicate that it is retryable, and an optional 
filter function which can try to do fixups or just specify some 
additional conditions to be tested.

class TooManyRetries(Exception):
    def __init__(self, inner):
        self.inner = inner
    def __str__(self):
        return 'Too many retries: %s' % (str(self.inner),)

def retryable(max_retries, exceptions, filter=None):
    """Creates a decorator which will retry specific exceptions.
    After there have been too many retries it raises TooManyRetries.
    """
    def decorator(f):
        def wrapper(*args, **kw):
            for i in xrange(max_retries):
                try:
                    return f(*args, **kw)
                except exceptions, e:
                    exc_info = sys.exc_info()
                    # Check for retry even the last time in case the
                    # filter wants to do any logging.
                    if filter is not None and filter(e,
                        i==max_retries-1):
                        pass
                    else:
                        raise
            # If we get here we have exceeded the maximum number of
            # retries.
            raise TooManyRetries, e, exc_info[2]

        wrapper.__name__ = f.__name__
        return wrapper
    return decorator

def isConflictError(error, lasttime):
    if (error.code==500
        and error.hdrs['Bobo-Exception-Type']=='ConflictError'):
        timestamp("Conflict Error", error.filename)
        return True
    return False

retryConflict = retryable(3, HTTPError, isConflictError)

# ----- some code showing it in use -----------
from mechanize import Browser
browser = Browser()

submit = retryConflict(browser.submit)
follow_link = retryConflict(browser.follow_link)

@retryConflict
def openpage(message, url, name=None):
    global PASSWORD
    if PASSWORD is None:
        start = time.time()
        PASSWORD = getpass.getpass()
        #PASSWORD = raw_input("password?")
        end = time.time()
        logger.LASTTIME += end-start # Don't include input in timestamp.

    resp = browser.open(url)
    follow_relay()

    if "ourloginpage" in browser.geturl():
        # Not yet logged in
        timestamp("Got login form")
        browser.select_form(nr=0)
        browser["user"] = USERID
        browser["pass"] = PASSWORD
        resp = browser.submit()
        follow_relay()
        if 'query' in [f.name for f in browser.forms()]:
            if name=="query":
                soup = BeautifulSoup(browser.response().read())
                err = soup.find('td', 'tdbodywarning')
                sys.exit(''.join(err.p.contents).strip())

    timestamp(message, name, url)
    return resp


From inhahe at gmail.com  Thu May 22 20:29:00 2008
From: inhahe at gmail.com (inhahe)
Date: Thu, 22 May 2008 20:29:00 -0400
Subject: call f(a, *b) with f(*a, **b) ?
References: <55bc8846-107e-461a-89de-25c83cbcfa27@2g2000hsn.googlegroups.com>
Message-ID: <5coZj.13951$hv2.4218@bignews5.bellsouth.net>


"bukzor" <workitharder at gmail.com> wrote in message 
news:55bc8846-107e-461a-89de-25c83cbcfa27 at 2g2000hsn.googlegroups.com...
> This question seems easy but I can't figure it out.
> Lets say there's a function:
>
> def f(a, *args):
>    print a
>    for b in args: print b
>
> and elsewhere in your program you have a list and a dict like this:
> args = [2, 3]
> kwargs = {'a':1}
>
> I'd like to get f() to print something like the following, but I can't
> figure out how.
> 1
> 2

I think there's no 'standard' way to do this. but:

import inspect
f(*map(kwargs.get, inspect.getargspec(f)[0])+args)

i don't know if it works because i'm afraid to try it.  if it doesn't the 
solution is something similar to that.




From pavlovevidence at gmail.com  Sun May  4 14:13:32 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 4 May 2008 11:13:32 -0700 (PDT)
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1> 
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org> 
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com> 
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com> 
	<mailman.544.1209917025.12834.python-list@python.org>
Message-ID: <035b047f-20fb-4bb0-b76a-61405077976a@d1g2000hsg.googlegroups.com>

On May 4, 12:03 pm, Gary Herron <gher... at islandtraining.com> wrote:
> Alexander Schmolck wrote:
> > Gary Herron <gher... at islandtraining.com> writes:
>
> >> But... It's not!
>
> >> A simple test shows that.   I've attached a tiny test program that shows this
> >> extremely clearly.  Please run it and watch it fail.
>
> > In [7]: run ~/tmp/t.py
> > final count: 2000000
> >   should be: 2000000
>
> > (I took the liberty to correct your test to actually do what I said, namely
> > use a numpy.array; just replace ``count = 0`` with ``import numpy; count =
> > numpy.array(0)``).
>
> The test was meant to simulate the OP's problem, but even with your
> suggestion of using numpy, it *still* fails!


Ok, so numpy scalars don't support += atomically.  Thank you for your
skepticism in discovering this.

However, what I said was not wholly untrue: code in C extensions is
protected by the GIL and thus not interruptable, unless it either
releases the GIL, or calls back into Python code (which is apparently
what numpy scalars do).

To illustrate, a small extension module is included below.  Just to
make things interesting, I added a long busy loop in between reading
and setting the counter, just to give the other thread maximum
opportunity to cut in.

If you were to compile it and run the test, you would find that it
works perfectly.


===========================
/* atomic.c */

#include <Python.h>
#include <structmember.h>

typedef struct {
    PyObject_HEAD
    long value;
} AtomicCounterObject;

static int init(AtomicCounterObject* self, PyObject* args,
                      PyObject* kwargs) {
    self->value = 0;
    return 0;
}

static PyObject* iadd(AtomicCounterObject* self, PyObject* inc) {
    long incval = PyInt_AsLong(inc);
    long store, i;
    static int bigarray[100000];
    if (incval == -1 && PyErr_Occurred()) return 0;

    store = self->value;

    /* Give the thread plenty of time to interrupt */
    for (i = 0; i < 100000; i++) bigarray[i]++;

    self->value = store + incval;

    return (PyObject*)self;
}

static PyObject* toint(AtomicCounterObject* self) {
    return PyInt_FromLong(self->value);
}

static PyNumberMethods ac_as_number = {
    0,                             /*nb_add*/
    0,                             /*nb_subtract*/
    0,                             /*nb_multiply*/
    0,                             /*nb_divide*/
    0,                             /*nb_remainder*/
    0,                             /*nb_divmod*/
    0,                             /*nb_power*/
    0,                             /*nb_negative*/
    0,                             /*nb_positive*/
    0,                             /*nb_absolute*/
    0,                             /*nb_nonzero*/
    0,                             /*nb_invert*/
    0,                             /*nb_lshift*/
    0,                             /*nb_rshift*/
    0,                             /*nb_and*/
    0,                             /*nb_xor*/
    0,                             /*nb_or*/
    0,                             /*nb_coerce*/
    (unaryfunc)toint,              /*nb_int*/
    0,                             /*nb_long*/
    0,                             /*nb_float*/
    0,                             /*nb_oct*/
    0,                             /*nb_hex*/
    (binaryfunc)iadd,              /*nb_inplace_add*/
    0,                             /*nb_inplace_subtract*/
    0,                             /*nb_inplace_multiply*/
    0,                             /*nb_inplace_divide*/
    0,                             /*nb_inplace_remainder*/
    0,                             /*nb_inplace_power*/
    0,                             /*nb_inplace_lshift*/
    0,                             /*nb_inplace_rshift*/
    0,                             /*nb_inplace_and*/
    0,                             /*nb_inplace_xor*/
    0,                             /*nb_inplace_or*/
    0,                             /* nb_floor_divide */
    0,                             /* nb_true_divide */
    0,                             /* nb_inplace_floor_divide */
    0,                             /* nb_inplace_true_divide */
    0,                             /* nb_index */
};

static PyTypeObject AtomicCounterType = {
    PyObject_HEAD_INIT(NULL)
    0,                             /*ob_size*/
    "AtomicCounter",               /*tp_name*/
    sizeof(AtomicCounterObject),   /*tp_basicsize*/
    0,                             /*tp_itemsize*/
    0,                             /*tp_dealloc*/
    0,                             /*tp_print*/
    0,                             /*tp_getattr*/
    0,                             /*tp_setattr*/
    0,                             /*tp_compare*/
    0,                             /*tp_repr*/
    &ac_as_number,                 /*tp_as_number*/
    0,                             /*tp_as_sequence*/
    0,                             /*tp_as_mapping*/
    0,                             /*tp_hash */
    0,                             /*tp_call*/
    0,                             /*tp_str*/
    0,                             /*tp_getattro*/
    0,                             /*tp_setattro*/
    0,                             /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,            /*tp_flags*/
    0,                             /*tp_doc */
    0,                             /*tp_traverse*/
    0,                             /*tp_clear*/
    0,                             /*tp_richcompare*/
    0,                             /*tp_weaklistoffset*/
    0,                             /*tp_iter*/
    0,                             /*tp_iternext*/
    0,                             /*tp_methods*/
    0,                             /*tp_members*/
    0,                             /*tp_getset*/
    0,                             /*tp_base*/
    0,                             /*tp_dict*/
    0,                             /*tp_descr_get*/
    0,                             /*tp_descr_set*/
    0,                             /*tp_dictoffset*/
    (initproc)init,                /*tp_init*/
    0,
    PyType_GenericNew,
};


static PyMethodDef methods[] = {
    {0} /* sentinel */
};


PyMODINIT_FUNC initatomic(void) {
    PyObject* m;
    if (PyType_Ready(&AtomicCounterType) < 0)
        return;
    m = Py_InitModule("atomic", methods);
    if (m == NULL)
        return;
    Py_INCREF(&AtomicCounterType);
    PyModule_AddObject(m, "AtomicCounter", (PyObject
*)&AtomicCounterType);
}

========================
# actest.py

import threading

N = 200000
import atomic; count = atomic.AtomicCounter()

class timer(threading.Thread):
    def run(self):
        global count
        for i in xrange(N):
            count += 1

def test():
    thread1=timer()
    thread2=timer()
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    print 'final count:', count
    print '  should be:', 2*N

if __name__=='__main__':
    test()
========================


Carl Banks


From google at mrabarnett.plus.com  Fri May  9 09:28:10 2008
From: google at mrabarnett.plus.com (MRAB)
Date: Fri, 9 May 2008 06:28:10 -0700 (PDT)
Subject: How can I add spaces where ever I have capital letters?
References: <4878ad7b0805081812l2a3412abh185a832866be2878@mail.gmail.com> 
	<mailman.829.1210298651.12834.python-list@python.org>
Message-ID: <769cd101-8b94-45ad-981e-9dbc754ee0d0@i76g2000hsf.googlegroups.com>

On May 9, 3:04 am, "Eric Wertman" <ewert... at gmail.com> wrote:
> Something like this.  I'm sure there are other ways to do it.
>
> import re
>
> def addspace(m) :
>         return ' ' + m.group(0)
>
> strng = "ModeCommand"
>
> newstr =  re.sub('[A-Z]',addspace,strng)
>
Alternatively:

newstr = re.sub('([A-Z])',r' \1',strng)

> print newstr.strip()
>
> On Thu, May 8, 2008 at 9:12 PM, John Schroeder <jschr... at gmail.com> wrote:
> > I have a string (which I got from the names of my classes) and I would like
> > to print out my CamelCase classes as titles.
>
> > I would like it to do this:
>
> >>>> my_class_name = "ModeCommand"
> > ## Do some magic here
> >>>> my_class_name
> > 'Mode Command'
>
> > Anyone know any easy way to do this?  Thanks.
>


From google at zvis.com  Wed May  7 12:03:55 2008
From: google at zvis.com (Zvi)
Date: Wed, 7 May 2008 09:03:55 -0700 (PDT)
Subject: Problem parsing SOAP envelope with ElementTree
References: <e5c3b1c8-6329-4687-8504-e6a1b7ccaa2e@n1g2000prb.googlegroups.com>
	<ovdUj.119321$rd2.85572@pd7urf3no>
Message-ID: <01a78e46-567c-48c2-848b-b70e3556e187@v26g2000prm.googlegroups.com>

On May 7, 1:12?am, Waldemar Osuch <waldemar.os... at gmail.com> wrote:
Thanks a lot :)
P.S. It was a complete code, I didn't write anything else.


From bj_666 at gmx.net  Tue May 13 03:27:55 2008
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 May 2008 07:27:55 GMT
Subject: Is using range() in for loops really Pythonic?
References: <482657ca$0$25026$607ed4bc@cv.net>
	<48275316$0$11629$607ed4bc@cv.net> <m2wsm037s0.fsf@googlemail.com>
	<3042f24f-f32e-4266-8bf5-41cdb511b78d@m45g2000hsb.googlegroups.com>
	<873aoo6k8z.fsf@benfinney.id.au>
	<efddd210-0b70-4b44-8807-4c7bc125e517@8g2000hse.googlegroups.com>
Message-ID: <68su7rF2uo1qcU2@mid.uni-berlin.de>

On Mon, 12 May 2008 11:23:07 -0700, Carl Banks wrote:

> On May 12, 3:42 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> Because of the precedent of those names, choosing one of those names
>> doesn't make it clear to the reader that the value is never used;
> 
> 
> Why is it even necessary to document this?  This is the thing that
> baffles me the most about this thread.

I do it (with a "special" name) because static source checkers issue a
warning for unused variables.

Ciao,
	Marc 'BlackJack' Rintsch


From Joshuajruss at gmail.com  Sat May 17 05:02:43 2008
From: Joshuajruss at gmail.com (Sanoski)
Date: Sat, 17 May 2008 02:02:43 -0700 (PDT)
Subject: how would you...?
References: <1449c36e-10ce-42f4-bded-99d53a0a2569@a1g2000hsb.googlegroups.com>
	<92880295-482a-4ae1-a746-9056ef58f2f7@l64g2000hse.googlegroups.com>
Message-ID: <82e6d704-95a8-4795-93a3-0650a0eaca27@d45g2000hsc.googlegroups.com>

The reason I ask about text files is the need to save the data
locally, and have it stored in a way where backups can easily be made.
Then if your computer crashes and you lose everything, but you have
the data files it uses backed up, you can just download the program,
extract the backed up data to a specific directory, and then it works
exactly the way it did before you lost it. I suppose a SQLite database
might solve this, but I'm not sure. I'm just getting started, and I
don't know too much about it yet.

I'm also still not sure how to download and associate the pictures
that each entry has for it. The main thing for me now is getting
started. It needs to get information from the web. In this case, it's
a simple XML feed. The one thing that seems that would make it easier
is every post to the feed is very consistent. Each header starts with
the letter A, which stands for Alpike Tech, follow by the name of the
class, the room number, the leading student, and his GPA. All that is
one line of text. But it's also a link to more information. For
example:

A Economics, 312, John Carbroil, 4.0
That's one whole post to the feed. Like I say, it's very simple and
consistent. Which should make this easier.

Eventually I want it to follow that link and grab information from
there too, but I'll worry about that later. Technically, if I figure
this first part out, that problem should take care of itself.





On May 17, 1:08?am, Mensanator <mensana... at aol.com> wrote:
> On May 16, 11:43?pm, Sanoski <Joshuajr... at gmail.com> wrote:
>
>
>
> > I'm pretty new to programming. I've just been studying a few weeks off
> > and on. I know a little, and I'm learning as I go. Programming is so
> > much fun! I really wish I would have gotten into it years ago, but
> > here's my question. I have a longterm project in mind, and I wont to
> > know if it's feasible and how difficult it will be.
>
> > There's an XML feed for my school that some other class designed. It's
> > just a simple idea that lists all classes, room number, and the person
> > with the highest GPA. The feed is set up like this. Each one of the
> > following lines would also be a link to more information about the
> > class, etc.
>
> > Economics, Room 216, James Faker, 3.4
> > Social Studies, Room 231, Brain Fictitious, 3.5
>
> > etc, etc
>
> > The student also has a picture reference that depicts his GPA based on
> > the number. The picture is basically just a graph. I just want to
> > write a program that uses the information on this feed.
>
> > I want it to reach out to this XML feed, record each instance of the
> > above format along with the picture reference of the highest GPA
> > student, download it locally, and then be able to use that information
> > in various was. I figured I'll start by counting each instance. For
> > example, the above would be 2 instances.
>
> > Eventually, I want it to be able to cross reference data you've
> > already downloaded, and be able to compare GPA's, etc. It would have a
> > GUI and everything too, but I am trying to keep it simple right now,
> > and just build onto it as I learn.
>
> > So lets just say this. How do you grab information from the web,
>
> Depends on the web page.
>
> > in this case a feed,
>
> Haven't tried that, just a simple CGI.
>
> > and then use that in calculations?
>
> The key is some type of structure be it database records,
> or a list of lists or whatever. Something that you can iterate
> through, sort, find max element, etc.
>
> > How would you
> > implement such a project?
>
> The example below uses BeautifulSoup. I'm posting it not
> because it matches your problem, but to give you an idea of
> the techniques involved.
>
> > Would you save the information into a text file?
>
> Possibly, but generally no. Text files aren't very useful
> except as a data exchange media.
>
> > Or would you use something else?
>
> Your application lends itself to a database approach.
> Note in my example the database part of the code is disabled.
> Not every one has MS-Access on Windows.
>
> > Should I study up on SQLite?
>
> Yes. The MS-Access code I have can be easily changed to SQLlite.
>
> > Maybe I should study classes.
>
> I don't know, but I've always gotten along without them.
>
> > I'm just not sure. What would be the most effective technique?
>
> Don't know that either as I've only done it once, as follows:
>
> ## ?I was looking in my database of movie grosses I regulary copy
> ## ?from the Internet Movie Database and noticed I was _only_ 120
> ## ?weeks behind in my updates.
> ##
> ## ?Ouch.
> ##
> ## ?Copying a web page, pasting into a text file, running a perl
> ## ?script to convert it into a csv file and manually importing it
> ## ?into Access isn't so bad when you only have a couple to do at
> ## ?a time. Still, it's a labor intensive process and 120 isn't
> ## ?anything to look forwards to.
> ##
> ## ?But I abandoned perl years ago when I took up Python, so I
> ## ?can use Python to completely automate the process now.
> ##
> ## ?Just have to figure out how.
> ##
> ## ?There's 3 main tasks: capture the web page, parse the web page
> ## ?to extract the data and insert the data into the database.
> ##
> ## ?But I only know how to do the last step, using the odnc tools
> ## ?from win32,
>
> ####import dbi
> ####import odbc
> import re
>
> ## ?so I snoop around comp.lang.python to pick up some
> ## ?hints and keywords on how to do the other two tasks.
> ##
> ## ?Documentation on urllib2 was a bit vague, but got the web page
> ## ?after only a ouple mis-steps.
>
> import urllib2
>
> ## ?Unfortunately, HTMLParser remained beyond my grasp (is it
> ## ?my imagination or is the quality of the examples in the
> ## ?doumentation inversely proportional to the subject
> ## ?difficulty?)
> ##
> ## ?Luckily, my bag of hints had a reference to Beautiful Soup,
> ## ?whose web site proclaims:
> ## ? ? ?Beautiful Soup is a Python HTML/XML parser
> ## ? ? ?designed for quick turnaround projects like
> ## ? ? ?screen-scraping.
> ## ?Looks like just what I need, maybe I can figure it out after all.
>
> from BeautifulSoup import BeautifulSoup
>
> target_dates = [['4','6','2008','April']]
>
> ####con = odbc.odbc("IMDB") ?# connect to MS-Access database
> ####cursor = con.cursor()
>
> for d in target_dates:
> ? #
> ? # build url (with CGI parameters) from list of dates needing
> updating
> ? #
> ? the_year = d[2]
> ? the_date = '/'.join([d[0],d[1],d[2]])
> ? print '%10s scraping IMDB:' ?% (the_date),
> ? the_url = ''.join([r'http://www.imdb.com/BusinessThisDay?
> day=',d[1],'&month=',d[3]])
> ? req = urllib2.Request(url=the_url)
> ? f = urllib2.urlopen(req)
> ? www = f.read()
> ? #
> ? # ok, page captured. now make a BeatifulSoup object from it
> ? #
> ? soup = BeautifulSoup(www)
> ? #
> ? # that was easy, much more so than HTMLParser
> ? #
> ? # now, _all_ I have to do is figure out how to parse it
> ? #
> ? # ouch again. this is a lot harder than it looks in the
> ? # documentation. I need to get the data from cells of a
> ? # table nested inside another table and that's hard to
> ? # extrapolate from the examples showing how to find all
> ? # the comments on a web page.
> ? #
> ? # but this looks promising. if I grab all the table rows
> ? # (tr tags), each complete nested table is inside a cell
> ? # of the outer table (whose table tags are lost, but aren't
> ? # needed and whose absence makes extracting the nested
> ? # tables easier (when you do it the stupid way, but hey,
> ? # it works, so I'm sticking with it))
> ? #
> ? tr = soup.tr ? ? ? ? ? ? ? ? ? ? ? ? ?# table rows
> ? tr.extract()
> ? #
> ? # now, I only want the third nested table. how do I get it?
> ? # can't seem to get past the first one, should I be using
> ? # NextSibling or something? <scratches head...>
> ? #
> ? # but wait...I don't need the first two tables, so I can
> ? # simply extract and discard them. and since .extract()
> ? # CUTS the tables, after two extractions the table I want
> ? # IS the first one.
> ? #
> ? the_table = tr.find('table') ? ? ? ? ?# discard
> ? the_table.extract()
> ? the_table = tr.find('table') ? ? ? ? ?# discard
> ? the_table.extract()
> ? the_table = tr.find('table') ? ? ? ? ?# weekly gross
> ? the_table.extract()
> ? #
> ? # of course, the data doesn't start in the first row,
> ? # there's formatting, header rows, etc. looks like it starts
> ? # in tr number [3]
> ? #
> ? ## ?>>> the_table.contents[3].td
> ? ## ?<td><a href="/title/tt0170016/">How the Grinch Stole Christmas
> (2000)</a> </td>
> ? #
> ? # and since tags always imply the first one, the above
> ? # is equivalent to
> ? #
> ? ## ?>>> the_table.contents[3].contents[0]
> ? ## ?<td><a href="/title/tt0170016/">How the Grinch Stole Christmas
> (2000)</a> </td>
> ? #
> ? # and since the title is the first of three cells, the
> ? # reporting year is
> ? #
> ? ## ?>>> the_table.contents[3].contents[1]
> ? ## ?<td> <a href="/Sections/Years/2001">2001</a> </td>
> ? #
> ? # finally, the 3rd cell must contain the gross
> ? #
> ? ## ?>>> the_table.contents[3].contents[2]
> ? ## ?<td align="RIGHT"> 259,674,120</td>
> ? #
> ? # but the contents of the first two cells are anchor tags.
> ? # to get the actual title string, I need the contents of the
> ? # contents. but that's not exactly what I want either,
> ? # I don't want a list, I need a string. and the string isn't
> ? # always in the same place in the list
> ? #
> ? # summarizing, what I need is
> ? #
> ? ## ?print the_table.contents[3].contents[0].contents[0].contents,
> ? ## ?print the_table.contents[3].contents[1].contents[1].contents,
> ? ## ?print the_table.contents[3].contents[2].contents
> ? #
> ? # and that almost works, just a couple more tweaks and I can
> ? # shove it into the database
>
> ? parsed = []
>
> ? for rec in the_table.contents[3:]:
> ? ? the_rec_type = type(rec) ? ? ? ? ? ? ? ? ? ? ?# some rec are
> NavSrings, skip
> ? ? if str(the_rec_type) == "<type 'instance'>":
> ? ? ? #
> ? ? ? # ok, got a real data row
> ? ? ? #
> ? ? ? TITLE_DATE = rec.contents[0].contents[0].contents ? # a list
> inside a tuple
> ? ? ? #
> ? ? ? # and that means we still have to index the contents
> ? ? ? # of the contents of the contents of the contents by
> ? ? ? # adding [0][0] to TITLE_DATE
> ? ? ? #
> ? ? ? YEAR = ?rec.contents[1].contents[1].contents ? ? ? ?# ditto
> ? ? ? #
> ? ? ? # this won't go into the database, just used as a filter to grab
> ? ? ? # the records associated with the posting date and discard
> ? ? ? # the others (which should already be in the database)
> ? ? ? #
> ? ? ? GROSS = rec.contents[2].contents ? ? ? ? ? ? ? ? ? ?# just a
> list
> ? ? ? #
> ? ? ? # one other minor glitch, that film date is part of the title
> ? ? ? # (which is of no use in the database, so it has to be pulled
> out
> ? ? ? # and put in a separate field
> ? ? ? #
> # ? ? ?temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
> (.*)',str(TITLE_DATE[0][0]))
> ? ? ? temp_title = re.search('(.*?)( \()([0-9]{4}.*)(\))
> (.*)',str(TITLE_DATE))
> ? ? ? #
> ? ? ? # which works 99% of the time. unfortunately, the IMDB
> ? ? ? # consitency is somewhat dubious. the date is _supposed_
> ? ? ? # to be at the end of the string, but sometimes it's not.
> ? ? ? # so, usually, there are only 5 groups, but you have to
> ? ? ? # allow for the fact that there may be 6
> ? ? ? #
> ? ? ? try:
> ? ? ? ? the_title = temp_title.group(1) + temp_title.group(5)
> ? ? ? except:
> ? ? ? ? the_title = temp_title.group(1)
> ? ? ? the_gross = str(GROSS[0])
> ? ? ? #
> ? ? ? # and for some unexplained reason, dates will occasionally
> ? ? ? # be 2001/I instead of 2001, so we want to discard the trailing
> ? ? ? # crap, if any
> ? ? ? #
> ? ? ? the_film_year = temp_title.group(3)[:4]
> # ? ? ?if str(YEAR[0][0])==the_year:
> ? ? ? if str(YEAR[0])==the_year:
> ? ? ? ? parsed.append([the_date,the_title,the_film_year,the_gross])
>
> ? print '%3d records found ' % (len(parsed))
> ? #
> ? # wow, now just have to insert all the update...
>
> read more ?



From bruno.42.desthuilliers at websiteburo.invalid  Wed May 28 06:48:02 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 28 May 2008 12:48:02 +0200
Subject: A quick question
In-Reply-To: <mailman.1678.1211970644.12834.python-list@python.org>
References: <mailman.1678.1211970644.12834.python-list@python.org>
Message-ID: <483d385c$0$7233$426a74cc@news.free.fr>

James a ?crit :
> Hey everyone,
> 
> I just started using python and cant figure this out, I'm trying to 
> make a program where someone types in a word and the program gives it 
> back backwards.  For example if the person puts in "cat" I want the 
> program to give it back as "tac" and what it does is prints out 3,2,1.  

This is what you asked for - range() returns a list of integers.

> How can I get these integers to print as letters?

What you want is not to "get these integers as letters", but to get the 
letters in the word in reversed order.

>  This is what I have,
> 
> word = raw_input("Type a word:")
> start = len(word)
> 
> for letter in range(start, 0, -1):
>     print letter  
> 

- The naive version:

for i in range(start-1, -1, -1):
     print word[i]


- The naive version with a native attempt to correct (wrt/ your specs) 
formatting:

drow = ''
for i in range(start-1, -1, -1):
     drow += word[i]
print drow

- The canonical pythonic version:

for letter in reverse(word):
     print letter

- The canonical version with correct (wrt/ your specs) formatting:

print ''.join(reversed(word))


- The Q&D (but working) perlish version:

print word[::-1]


HTH


From a.schmolck at gmail.com  Sun May  4 20:37:38 2008
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Mon, 05 May 2008 01:37:38 +0100
Subject: is +=1 thread safe
References: <4819DA2D.3030508@ggmail.com>
	<Xns9A91A511BFF4duncanbooth@127.0.0.1>
	<481BD50F.5080608@ggmail.com> <yfswsmbf0gm.fsf@gmail.com>
	<mailman.512.1209875483.12834.python-list@python.org>
	<8a0d4152-af47-4c83-bf78-c5ceda7c9fbd@8g2000hse.googlegroups.com>
	<mailman.516.1209885415.12834.python-list@python.org>
	<yfsod7mfcl0.fsf@gmail.com>
	<mailman.544.1209917025.12834.python-list@python.org>
Message-ID: <yfsskwxegbx.fsf@gmail.com>

Gary Herron <gherron at islandtraining.com> writes:

> The test was meant to simulate the OP's problem, but even with your suggestion
> of using numpy, it *still* fails!  

Well, although I haven't tested it extensively, it doesn't appear to fail for
me, with numpy 1.02 and an AMD Athlon(tm) XP 2800+ under linux 2.6, so it is
possible that numpy's implementation has changed wrt. to GIL usage (or that
the platform makes a difference, but that seems less likely):

In [26]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [27]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [28]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [29]: run ~/tmp/t.py
final count: 2000000
  should be: 2000000

In [30]: run ~/tmp/t.py
final count: 10000000
  should be: 10000000

I don't claim to have deep knowledge of threading/GIL issues under python, but
my understanding is that you can certainly write an extension that does this
atomically if required (although the bytecode for immutable and mutable is the
same, I think the problem in the immutable case is that the rebinding that
occurs after the inplaceadd step is to a new object, and hence not a no-op).
This isn't to distract from your and Aahz point downthread: this is inherently
a very brittle way to go about things. On the other hand if you have some
already dodgy legacy code (as the OP indicated) that you want to make work
with a minimum of fuzz, it might still be a reasonable option.

'as


From walterbyrd at iname.com  Mon May 12 22:35:49 2008
From: walterbyrd at iname.com (walterbyrd)
Date: Mon, 12 May 2008 19:35:49 -0700 (PDT)
Subject: frameword vs application server?
References: <789171c4-6bad-4522-830b-c364876589ee@k1g2000prb.googlegroups.com>
	<68r2sbF2tjrl5U1@mid.uni-berlin.de>
Message-ID: <f60f77b5-64c7-42ca-8f7b-717a9a90e834@s33g2000pri.googlegroups.com>

On May 12, 8:34 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:

> As mentioned above - in some aspects, that is not really needed. But if
> you want more of an app-server, have a look at ZOPE, Kamaelia and maybe
> even twisted.

Thanks. Kamaelia reminds me of SOA - loosely coupled software services
talking with each other. Interesting stuff.


From superflit at gmail.com  Fri May 23 09:02:09 2008
From: superflit at gmail.com (flit)
Date: Fri, 23 May 2008 06:02:09 -0700 (PDT)
Subject: Advice from senior Members
Message-ID: <36962062-07d4-4ede-a882-d04ad1fa8e69@b1g2000hsg.googlegroups.com>

Hello All,

I am looking for some experience from the senior members.
Now I am doing a simple desktop application, this application will
have 3 main functions:

1- Read information about the desktop system;
2- Interact with the user;
3- Send information to a server.

The first part, reading information about the desktop system, is
already done.
And now I am starting to make the gui for the user, that is when the
question appear:
"What is the best way to make it? divide in files? by classes or
functions?"
I have now one big file with all functions to get the desktop
information.
Should I make one file for the visual functions (wxpython)? another
for the server?
Is productive to divide in files? what is the best way?

It seems like a naive question, maybe easy one, but I am willing to
enjoy the experience from the most senior programmers here.

Thanks


From steve at holdenweb.com  Thu May  1 15:41:45 2008
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 01 May 2008 15:41:45 -0400
Subject: Python Wins "Favorite Scripting Language" Award
Message-ID: <481A1CF9.1010106@holdenweb.com>

The Linux Journal readers apparently suffer the same ambiguity as the 
rest of us when it comes to defining what the difference between a 
scripting language and a programming language.

They do, however, clearly like Python, which they voted their scripting 
language of 2008. PHP, Bash and Perl came in reasonably close on 
Python's heels, but 28.9% of those voting voted for Python.

See all the awards at

   http://www.linuxjournal.com/article/10065

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/


From jcd at sdf.lonestar.org  Fri May  9 10:02:49 2008
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 09 May 2008 10:02:49 -0400
Subject: Dynamic generation of images (was Re: Custom Classes?)
In-Reply-To: <4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
References: <4dc0cfea0804300902o7493dab2m35999b5b59deace4@mail.gmail.com>
	<1209576920.4990.17.camel@aalcdl07.lib.unc.edu>
	<4dc0cfea0805011531s4574eb0bk8b6aea6ac010c881@mail.gmail.com>
	<1209729679.6589.23.camel@jcd-desktop>
	<4dc0cfea0805020638l59af4bb2o4abdcb12ee88995f@mail.gmail.com>
	<4dc0cfea0805080833l7fc8c711t92fdad94e2014551@mail.gmail.com>
Message-ID: <1210341769.3332.16.camel@aalcdl07.lib.unc.edu>

On Thu, 2008-05-08 at 10:33 -0500, Victor Subervi wrote:
> Okay, trying this again with everything working and no ValueError or
> any other errors, here we go:
> 
> Load this code. Unless you use a similar login() script, you will want
> to edit your own values into the user, passwd, db and host:
> 
> #!/usr/bin/python
> 
> import MySQLdb
> 
> import sys,os
> sys.path.append(os.getcwd())
> from login import login
> user, passwd, db, host = login()
> 
> pic = "pic1"
> w = 20
> x = 0
> d = 6
> y = 1
> 
> getpic = "getpic" + str(w) + ".py"
> try:
>   os.remove(getpic)
> except:
>   pass
> code = """
> #!/usr/local/bin/python
> import cgitb; cgitb.enable()
> import MySQLdb
> import cgi
> import sys,os
> sys.path.append(os.getcwd())
> from login import login
> user, passwd, db, host = login()
> form = cgi.FieldStorage()
> picid = int(form["id"].value)
> x = int(form["x"].value)
> pics =
> {1:'pic1',2:'pic1_thumb',3:'pic2',4:'pic2_thumb',5:'pic3',6:'pic3_thumb',7:'pic4',8:'pic4_thumb',\
> 9:'pic5',10:'pic5_thumb',11:'pic6',12:'pic6_thumb'}
> pic = pics[x]
> db = MySQLdb.connect(host, user, passwd, db)
> cursor= db.cursor()
> sql = "select %s from products where id='%s';" % (pic, str(picid))
> 
> cursor.execute(sql)
> content = cursor.fetchall()[0][0].tostring()
> cursor.close()
> print 'Content-Type: image/jpeg'
> print
> print content
> """
> script = open(getpic, "w")
> script.write(code)
> script.close()
> 
> 
> 
> and then surf to:
> http://whatever.url/getpic20.py?id=6&x=1
> 
> 
> Also, please re-send the link on how to post good questions to the
> list. I cannot find it.
> TIA,
> Victor

Why are you dynamically creating getpic20.py?

Obviously, in the real script, you probably have several of them:
getpic1.py, getpic2.py, etc., but is there any reason you couldn't just
have one getpic.py, and pass the number in as a parameter in your GET
request, like this:

http://localhost/getpic.py?id=6&x=1&w=20

Then you can just have a static getpic.py.  I've stripped out useless
bits:

* You don't use sys or os, so why import them?
* MySQL makes it difficult for me to replicate your behavior, because I 
  don't have your DB setup.  The DB call has been replaced with a
  dictionary of keys into JPG data, pulled from the filesystem.  Change 
  filenames to jpegs on your own hard drive
* login is useless without MySQL.

So your new getpic.py (statically created) looks like this:

~~~ getpic.py ~~~
#!/usr/local/bin/python

import cgitb; cgitb.enable()
import cgi

pics = { 
    1: open('pic.jpg').read(),
    2: open('pic2.jpg').read()
}
# you could just pass the filename, and then you wouldn't have to load
the
# image data in advance, but this more closely mimics the concept of
your DB 
# setup.

form = cgi.FieldStorage()
x = int(form["x"].value)
pic = pics[x]

print 'Content-Type: image/jpeg'
print
print pic
~~~

Then if you want to include your pictures in a web page, you do

~~~ show_pics.html ~~~
<html>
  <head><title>Pictures</title></head>
  <body>
    <h1>pictures</h1>
    <img src='http://example.com/getpic.py?x=1'/>
    <img src='http://example.com/getpic.py?x=2'/>
  </body>
</html>
~~~

This should work just as well when you refactor the script to pull from
the database.

Hope this helps.  Also, the article on asking good questions is
available here:  http://catb.org/~esr/faqs/smart-questions.html





From phil at freehackers.org  Tue May  6 10:31:49 2008
From: phil at freehackers.org (BlueBird)
Date: Tue, 6 May 2008 07:31:49 -0700 (PDT)
Subject: how to use subprocess.Popen execute "find" in windows
References: <5666ed04-8a2f-4dad-b7bc-3e3c3c084f03@f24g2000prh.googlegroups.com>
Message-ID: <aa6b861d-8714-413d-aada-b8a1846a3cb4@x41g2000hsb.googlegroups.com>

On May 6, 11:19 am, clyf... at gmail.com wrote:
> In cmd, I can use find like this.
>
> C:\>netstat -an | find "445"
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
>
> C:\>
>
> And os.system is OK.>>> import os
> >>> os.system('netstat -an | find "445"')
>
>   TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
>   UDP    0.0.0.0:445            *:*
> 0
>
>
>
> But I don't know how to use subprocess.Popen to do this.
>
> from subprocess import Popen, PIPE
>
> p1 = Popen(['netstat', '-an'], stdout = PIPE)
> p2 = Popen(['find',  '"445"'], stdin = p1.stdout, stdout = PIPE)
> print p2.stdout.read()
>

I would say that, according to documentation, the following should
work:
print p2.communicate()[0]


    Philippe


From Graham.Dumpleton at gmail.com  Sat May 17 23:56:51 2008
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Sat, 17 May 2008 20:56:51 -0700 (PDT)
Subject: Arch problems--how do I build PIL to be 64 bit so it plays nicely
	on OS X?
References: <d94878c8-3ea1-4da0-9515-9a8aa7f8210e@x41g2000hsb.googlegroups.com>
Message-ID: <bc6ad6bd-f42a-421f-af45-55a9a23699d1@i36g2000prf.googlegroups.com>

On May 17, 6:16?am, lampshade <mwolff... at gmail.com> wrote:
> Hello,
>
> I'm using python + django to do some web design and I would really
> like to use the python image library as part of this. ?There seems to
> be a problem, however, with apache andmod_pythonbeing 64 bit while
> my python image library(PIL) is only 32 bit.
>
> Does anyone have experience with building the correct architectures so
> that OS X 10.5 plays nicely? ?I think, when it comes down to it, I
> just need PIL at this point to be x86_64 so that it plays with apache
> andmod_python.
>
> Any advice, hand-holding, or sage wisdom?

See:

  http://code.google.com/p/modwsgi/wiki/InstallationOnMacOSX

and also the document it references:

  http://developer.apple.com/releasenotes/OpenSource/PerlExtensionsRelNotes/index.html

Graham


From geonomica at gmail.com  Fri May 23 00:55:41 2008
From: geonomica at gmail.com (gianluca)
Date: Thu, 22 May 2008 21:55:41 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
	<JsWdncqznKjsY6jVnZ2dnUVZ_jadnZ2d@comcast.com>
Message-ID: <8bc14652-a62e-4724-99b8-afee7ce41511@2g2000hsn.googlegroups.com>

On 23 Mag, 01:14, Larry Bates <larry.ba... at websafe.com`> wrote:
> gianluca wrote:
> > Hy,
> > I need help about use dll with ctypes. I've compiled my dll C library
> > and I copied it in c:\windows\system32. When I load it with
> > "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> > python don't see the dll function. with dir(myDLL) I've only this:
> > ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> > '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> > '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> > '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> > '_name']
>
> > Could anybody help me
>
> > Thanks
>
> > Gianluca
>
> Since it isn't python, dir can'd do much introspection on the object to produce
> the type of output you desire.  You have to know the functions (methods) that
> you want to call in your dll and call them.
>
> -Larry Bates


Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
exception like this:

Traceback (most recent call last):
  File "<pyshell#18>", line 1, in <module>
    myDLL.myFUNCT()
  File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
    func = self.__getitem__(name)
  File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: function 'myFUNCT' not found

Thanks for help


From casey.mcginty at gmail.com  Sat May 24 17:40:17 2008
From: casey.mcginty at gmail.com (Casey McGinty)
Date: Sat, 24 May 2008 11:40:17 -1000
Subject: Code correctness, and testing strategies
In-Reply-To: <Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
References: <mailman.1525.1211632496.12834.python-list@python.org>
	<roy-2F30A4.09291024052008@70-1-84-166.area1.spcsdns.net>
	<mailman.1532.1211644302.12834.python-list@python.org>
	<Xns9AA8BAD1431Cduncanbooth@127.0.0.1>
	<mailman.1539.1211660262.12834.python-list@python.org>
	<Xns9AA8E28C4305Dduncanbooth@127.0.0.1>
Message-ID: <ae3f58470805241440i4218403i903c8e1a992abbc5@mail.gmail.com>

> Seriously, 10 hours of testing for code developed in 10 hours? What
> > kind of environment do you write code for? This may be practical for
> > large companies with hordes of full-time testing & QA staff, but not
> > for small companies with just a handful of developers (and where you
> > need to borrow somone from their regular job to do non-developer
> > testing).
>
> I've done plenty of projects using conventional methods in small companies.
> If anything test time equal to development time is a vast underestimate.
>
> Frederick Brooks general rule in Mythical Man Month is a project should
estiamte1/6 coding and1/2 test time. In other words, 1 hour of coding time
should have 3 hours of testing time.

*"In examining conventionally scheduled projects, I have found that few
allowed one-half of the projected schedule for testing, but that most did
indeed spend half of the actual schedule for that purpose. Many of these
were on schedule until and except in system testing." -MMM
*
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From bjourne at gmail.com  Thu May 29 17:08:28 2008
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 29 May 2008 23:08:28 +0200
Subject: Compare 2 files and discard common lines
In-Reply-To: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
References: <8d55718c-6881-4844-b8d1-bbe1c5929f46@x35g2000hsb.googlegroups.com>
Message-ID: <740c3aec0805291408w40eb3ca1ma07be5c62fe5a63d@mail.gmail.com>

Open('3rd', 'w').writelines(set(open('2nd').readlines())-set(open('1st')))

2008/5/29, loial <jldunn2000 at googlemail.com>:
> I have a requirement to compare 2 text files and write to a 3rd file
> only those lines that appear in the 2nd file but not in the 1st file.
>
> Rather than re-invent the wheel I am wondering if anyone has written
> anything already?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
mvh Bj?rn


From inhahe at gmail.com  Sun May 18 01:00:33 2008
From: inhahe at gmail.com (inhahe)
Date: Sun, 18 May 2008 01:00:33 -0400
Subject: help compiling Python on vs 2008!
Message-ID: <8JOXj.48140$3v1.32406@bignews3.bellsouth.net>

"inhahe" <inhahe at gmail.com> wrote in message news:...
> VS2005 seems to be officially supported.  Here's part of the readme file 
> in the PCBuild8 directory in the Python 2.5 source.
>
> "
> Building Python using VC++ 8.0
> -------------------------------------
> This directory is used to build Python for Win32 platforms, e.g. Windows
> 95, 98 and NT.  It requires Microsoft Visual C++ 8.0
> (a.k.a. Visual Studio 2005).  There are two Platforms defined, Win32
> and x64.
> (For other Windows platforms and compilers, see ../PC/readme.txt.)
> "
>
> Although I take your point about sharing resources.  I'm not sure I should 
> bother compiling 2.6, since I'll probably come across/already use modules 
> that I need that don't support 2.6 since it's so new.  So it would be nice 
> to know why following the instructions doesn't work.  Compilers never work 
> for me, though.. even when I follow instructions and they work for 
> everybody else.  It's like a schroedinbug - I just don't expect them to 
> work.  As a matter of principle, though, it /should/ work.. so it's gotta 
> be *somebody's* job to debug this! :P
>

Actually, I was under the impression that the socket module relied on one of 
the external libraries to work, since it didn't work when I compiled it. 
But reading the readme again I realized that the socketmodule is supposed to 
compile out of the box.  So I compiled Python again on VS2005 instead of 
2008 (the error I posted that didn't work on 2008 or 2005 was trying to 
compile one of the external libraries), and the socket module seems to work. 
The external libraries don't seem that important.  So it was partly my 
fault.. but still, the external libraries didn't compile like they said they 
would. =P





From marlin_rowley at hotmail.com  Fri May 16 19:24:46 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 18:24:46 -0500
Subject: numpy.frombuffer != unpack() ??
In-Reply-To: <BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
References: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>
	<g0l1jt$vc$1@ger.gmane.org>
	<BAY135-W2705C8E523ED311ABFFB6B9FC80@phx.gbl>
Message-ID: <BAY135-W29DD96711C9B94BD1F0A339FC80@phx.gbl>

All: Say I have an array: a = (['rrrrggggbbbbaaaa'],['rrrrggggbbbbaaaa']) How do I make it so that I now have: starting with first element (a[0])new_arr[0] = 'r'new_arr[1] = 'g'new_arr[2] = 'b'new_arr[3] = 'a'new_arr[4] = 'r'..... continuing "through" a[1] with the same new_arrnew_arr[N] = 'r'new_arr[N+1] = 'g'.... -M


From: marlin_rowley at hotmail.comTo: robert.kern at gmail.com; python-list at python.orgSubject: RE: numpy.frombuffer != unpack() ??Date: Fri, 16 May 2008 17:31:30 -0500


Thank you!  That solved it! -M

> To: python-list at python.org> From: robert.kern at gmail.com> Subject: Re: numpy.frombuffer != unpack() ??> Date: Fri, 16 May 2008 17:25:00 -0500> > Marlin Rowley wrote:> > All:> > > > I'm getting different floating point values when I use numpy vs. unpack().> > > > frgba = numpy.frombuffer(<string of bytes>, dtype=float32)> > buffer = unpack("!f", byte)> > > > frgba[0] != buffer[0]> > > > why? This is forcing me use the unpack() function since it's giving me > > the correct values. What am I doing wrong?> > Endianness, perhaps? '!' specifies big-endian data (an alias for '>'). Most > likely, you are on a little-endian platform. All of the dtypes in numpy default > to the native-endianness unless specified. If you want to read big-endian data > using numpy, do this:> > frgba = numpy.frombuffer(<string of bytes>, dtype='>f')> > If you have any more problems with numpy, please join us on the numpy mailing > list. When reporting problems, please try to provide a small but complete > snippet of self-contained code, the output that you got, and explain the output > that you expected to get. Thank you.> > http://www.scipy.org/Mailing_Lists> > -- > Robert Kern> > "I have come to believe that the whole world is an enigma, a harmless enigma> that is made terrible by our own mad attempt to interpret it as though it had> an underlying truth."> -- Umberto Eco> > --> http://mail.python.org/mailman/listinfo/python-list

E-mail for the greater good. Join the i?m Initiative from Microsoft. 
_________________________________________________________________
E-mail for the greater good. Join the i?m Initiative from Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood
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From NpOeStPeAdM at nnowslpianmk.com  Sat May 31 03:36:27 2008
From: NpOeStPeAdM at nnowslpianmk.com (Peter Duniho)
Date: Sat, 31 May 2008 00:36:27 -0700
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<rem-2008may08-005@yahoo.com> <g1njc5$p1i$1@reader2.panix.com>
	<op.ubzgobgsut4oq5@pandora.alfanett.no>
	<v-2dnSYQWMbyFN3VnZ2dnUVZ_rmdnZ2d@comcast.com>
	<Zf00k.2464$uE5.1601@flpi144.ffdc.sbc.com>
	<4840ab73$0$90274$14726298@news.sunsite.dk>
	<g1qobk02jbj@news4.newsguy.com>
Message-ID: <op.ub0cq1fy8jd0ej@petes-computer.local>

On Fri, 30 May 2008 22:40:03 -0700, szr <szrRE at szromanMO.comVE> wrote:

> Arne Vajh?j wrote:
>> Stephan Bour wrote:
>>> Lew wrote:
>>> } John Thingstad wrote:
>>> } > Perl is solidly based in the UNIX world on awk, sed, bash and C.
>>> } > I don't like the style, but many do.
>>> }
>>> } Please exclude the Java newsgroups from this discussion.
>>>
>>> Did it ever occur to you that you don't speak for entire news groups?
>>
>> Did it occur to you that there are nothing about Java in the above ?
>
> Looking at the original post, it doesn't appear to be about any specific
> language.

Indeed.  That suggests it's probably off-topic in most, if not all, of the  
newsgroups to which it was posted, inasmuch as they exist for topics  
specific to a given programming language.

Regardless, unless you are actually reading this thread from the c.l.j.p  
newsgroup, I'm not sure I see the point in questioning someone who _is_  
about whether the thread belongs there or not.  Someone who is actually  
following the thread from c.l.j.p can speak up if they feel that Lew is  
overstepping his bounds.  Anyone else has even less justification for  
"speaking for the entire newsgroup" than Lew does, and yet that's what  
you're doing when you question his request.

And if it's a vote you want, mark me down as the third person reading  
c.l.j.p that doesn't feel this thread belongs.  I don't know whether Lew  
speaks for the entire newsgroup, but based on comments so far, it's pretty  
clear that there unanimous agreement among those who have expressed an  
opinion.

If you all in the other newsgroups are happy having the thread there,  
that's great.  Please feel free to continue with your discussion.  But  
please, drop comp.lang.java.programmer from the cross-posting.

Pete


From torriem at gmail.com  Fri May  2 10:53:56 2008
From: torriem at gmail.com (Michael Torrie)
Date: Fri, 02 May 2008 08:53:56 -0600
Subject: Finally had to plonk google gorups.
In-Reply-To: <2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
References: <IJ6dnQ-yor5kl5vVnZ2dnUVZ_oaonZ2d@visi>	<966256b2-fe7c-4ec5-900b-90b285311881@k10g2000prm.googlegroups.com>	<87abjne42n.fsf@physik.rwth-aachen.de>	<2dc0c81b0804300851h63500c54q8570202c9cece332@mail.gmail.com>	<87r6cncp4r.fsf@physik.rwth-aachen.de>	<2dc0c81b0804301029n5db13d7ej8cb71938f1980f7e@mail.gmail.com>
	<2dc0c81b0804301030x7858b8b5y14729ba3632c61b9@mail.gmail.com>
Message-ID: <481B2B04.6060302@gmail.com>

Shawn Milochik wrote:
> How does one "plonk" stuff from Google Groups? Specifically, how
> can this be done in Gmail?

Set up a filter that looks for some phrase in the mail headers that
identifies messages originating from google groups.  Gmail's filters are
fairly flexible.  I'd probably just have it look for certain words.
Look at an e-mail's source (raw view) and particularly check in the
headers for things to filter by.


From __peter__ at web.de  Fri May  9 08:39:43 2008
From: __peter__ at web.de (Peter Otten)
Date: Fri, 09 May 2008 14:39:43 +0200
Subject: Function creation (what happened?)
References: <199c06d7-601c-49f3-a88c-c28f7283e619@25g2000hsx.googlegroups.com>
Message-ID: <g01gmb$ke4$03$1@news.t-online.com>

Viktor wrote:

> Can somebody give me an explanation what happened here (or point me to
> some docs)?
> 
> Code:
> 
> HMMM = None
> 
> def w(fn):
>     print 'fn:', id(fn)
>     HMMM = fn
>     print 'HMMM:', id(HMMM)

This prints the id() of the local (to the function w()) HMMM variable

>     def wrapper(*v, **kw):
>         fn(*v, **kw)
>     wrapper.i = fn
>     print 'wrapper:', id(wrapper)
>     return wrapper
> 
> class A:
>     @w
>     def __init__(self): pass
> 
> print 'A.__init__:', id(A.__init__)
> print 'A.__init__.i:', id(A.__init__.i)
> print 'HMMM:', id(HMMM)

while this prints the id() of the global HMMM variable. Python assumes that
a variable is local to a function if there is an assignment to that
variable anywhere inside that function.

If you want to change the variable (Python-lingo "rebind the name") HMMM
declare it as global in the function:

def w(fn):
    global HMMM
    # ...
    HMMM = fn
    # ...

Otherwise I've no idea what you are trying to do here...

Peter


From daveparker at flamingthunder.com  Wed May 28 09:22:53 2008
From: daveparker at flamingthunder.com (Dave Parker)
Date: Wed, 28 May 2008 06:22:53 -0700 (PDT)
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<20080514215943.14c92f16.johnjsal@NOSPAMgmail.com>
	<b8af78c3-a978-4b06-89b2-2c7467da540f@n1g2000prb.googlegroups.com>
	<94bac166-d13c-44dd-af84-db19e19488b8@w1g2000prd.googlegroups.com> 
	<8cfd3523-8d16-40bc-b904-94a6a36a414d@p25g2000pri.googlegroups.com> 
	<mailman.1490.1211495188.12834.python-list@python.org>
Message-ID: <5c98049e-e62e-4ab1-afed-b0a3e186bd05@w1g2000prd.googlegroups.com>

> Does this mean that Flaming Thunder requires explicit checking rather
> than offering exceptions?

Right now, yes, Flaming Thunder has minimal error handling.  But error
handling is rising on the list of priorities for the next few weeks
(arrays, matrices, and 3D graphics are the hightest).

I think in a month or two, Flaming Thunder will be using catch/throw
exception and error handling.  So, for example:

Set result to catch(read x from "input.txt".).
If result is an error then go to quit.

If not caught, errors will propagate up and if they they hit the top
level, cause the program to write an error message and exit.

Using only catch instead of try/catch has several advantages that I
can see.  1) it gets rid of all the impotent try/catch/throw
statements cluttering up Java, etc.  2) since all Flaming Thunder
statements return values (like C statements), Catch also gives you a
single, uniform, syntactically unambiguous way to embed statements (or
whole statement lists) into expressions -- without causing the
syntactic problems of = statements in if statements or the obfuscation
of question mark notation, etc.  For example:

If catch(set x to y+z.) < 0.1 then go to tinyanswer.

On May 22, 4:19?pm, Brian Quinlan <br... at sweetapp.com> wrote:
> Dave Parker wrote:
> >> Or just:
>
> >> If command is "quit" ...
>
> > Hmmm. ?In Flaming Thunder, I'm using "is" (and "is an", "is a", etc)
> > for assigning and checking types. ?For example, to read data from a
> > file and check for errors:
>
> > ? ? ?Read data from "input.txt".
> > ? ? ?If data is an error then go to ...
>
> Hey Dave,
>
> Does this mean that Flaming Thunder requires explicit checking rather
> than offering exceptions?
>
> Cheers,
> Brian



From gagsl-py2 at yahoo.com.ar  Tue May 27 11:09:13 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 May 2008 12:09:13 -0300
Subject: decorators when?
References: <3m0o34hbb0c6rpr6ec0qh3hlkaagt8pfi5@4ax.com>
	<6a2edeF356g4eU1@mid.uni-berlin.de>
	<as7o349cng9nd2p18sh1n03t56if5aeejp@4ax.com>
Message-ID: <op.ubti1njdx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 May 2008 11:52:25 -0300, David C. Ullrich  
<dullrich at sprynet.com> escribi?:

> Oh. Never mind the details, let's just say that having 2.3 and
> 2.5 installed on the same machine can lead to confusion
> about exactly which one you're running a script under.
> Duh.

You might change the prompt; put these lines in your sitecustomize.py (or  
create it if you don't have one):

import sys
sys.ps1 = 'p23> '
sys.ps2 = ' ... '

> Sorry. Thanks. I don't suppose that decorators are available
> from __future__ somehow in 2.3?

No. But a decorator is only syntax sugar.

@decorator
def f():
   ...

is the same thing as:

def f():
   ...
f = decorator(f)

(just more convenient)

-- 
Gabriel Genellina



From XX.XmcX at XX.XmclaveauX.com  Mon May 12 01:25:48 2008
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 12 May 2008 07:25:48 +0200
Subject: Make Python create a tuple with one element in a clean way
References: <a1e7dda9-509d-4108-9663-78a0b728c242@34g2000hsf.googlegroups.com>
	<77887b15-0bae-43b7-a2ac-d0f079d8c80c@p39g2000prm.googlegroups.com>
Message-ID: <mn.61bd7d8518c3bb84.46195@XX.XmclaveauX.com>

Hi!

> You want 2*(3+4) to return (7,7)?

For have that:  2*(3+4,)




-- 
@-salutations

Michel Claveau




From deets at nospam.web.de  Sun May 18 16:31:44 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 May 2008 22:31:44 +0200
Subject: Showing the method's class in expection's traceback
In-Reply-To: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
References: <79c7d6fb-a6b8-481f-9a36-81b980628710@59g2000hsb.googlegroups.com>
Message-ID: <69bi20F31j4kdU1@mid.uni-berlin.de>

Agustin Villena schrieb:
> Hi!
> 
> is there anyway to show the class of a method in an exception's
> traceback?
> 
> For example, the next code
> 
> class Some(object):
>     def foo(self,x):
>         raise Exception(x)
> 
> obj = Some()
> obj.foo("some arg")
> 
> produces the next traceback
> 
> Traceback (most recent call last):
>   File "<string>", line 231, in run_nodebug
>   File "G:\dev\exceptions\sample.py", line 7, in <module>
>     obj.foo("some arg")
>   File "G:\dev\exceptions\sample.py", line 3, in foo
>     raise Exception(x)
> Exception: some arg
> 
> I want to improve the line
> File "G:\dev\exceptions\sample.py", line 3, in foo
> 
> to
> File "G:\dev\exceptions\sample.py", line 3, in Some.foo
> 
> Is this improvement feasible

It should be. You can get a dictionary of the locals of an exception 
stack frame, of which you could extract the self-parameter's class.

Diez


From larry.bates at websafe.com`  Tue May  6 16:17:24 2008
From: larry.bates at websafe.com` (Larry Bates)
Date: Tue, 06 May 2008 15:17:24 -0500
Subject: read line
In-Reply-To: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
References: <240aafd8-17b7-431a-a529-fdf617703093@c65g2000hsa.googlegroups.com>
Message-ID: <euadncEHXvd6Ib3VnZ2dnUVZ_r6rnZ2d@comcast.com>

moustafa.elmihy at gmail.com wrote:
> hi every body,
> 
> I'm a new python user and I'm making a program to run useing Abaqus
> and there is something I can't do,
> 
> if i have a text file that has a line like this " 10   20  30     40
> 50" and I wana do the coding to put every number of these like 10 or
> 20 in a separate variable .. any suggestions ??
> 
> thanks in advance

The problem with you not actually trying anything and posting it here is that we 
have no real idea if 10, 20, ... 50 should be strings, integers, floats, 
hexadecimal, or decimal "variables".

Assuming you mean integers:

fp=open('textfile.txt')
l=fp.readline()
a,b,c,d,e = [int(x) for x in l.split()]
fp.close()

More likely you need:
values = [int(x) for x in l.split()]

-Larry


From space.captain.face at gmail.com  Thu May 29 21:31:05 2008
From: space.captain.face at gmail.com (Kalibr)
Date: Thu, 29 May 2008 18:31:05 -0700 (PDT)
Subject: Finding file details...
References: <c34183d5-804b-4ee6-97bb-064a15302afb@w8g2000prd.googlegroups.com>
	<mailman.1742.1212075712.12834.python-list@python.org>
Message-ID: <ae37b0a8-1f77-468c-ba8d-a0513d8380f8@b5g2000pri.googlegroups.com>

On May 30, 1:41 am, "Roger Upole" <rup... at hotmail.com> wrote:
>
> You can use the shell COM objects to access media properties
> as shown by Explorer.
>
> import win32com.client
> sh=win32com.client.Dispatch('Shell.Application')
>
> folder= r'M:\Music\Bob Dylan\Highway 61 Revisited'
> ns=sh.NameSpace(folder)
>
> ## the column index for Artist may vary from folder to folder
> for c in range(0,255):
>     colname=ns.GetDetailsOf(None, c)
>     if colname=='Artists':  ## This shows up as just Artist on XP
>         for i in ns.Items():
>             artist=ns.GetDetailsOf(i, c)
>             if artist:
>                 print ns.GetDetailsOf(i, 0), artist
>         break
>
>             Roger

I shall give that a go. (is the module you reference this one?
http://python.net/crew/mhammond/win32/Downloads.html )


From Scott.Daniels at Acm.Org  Thu May  8 08:50:42 2008
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 08 May 2008 05:50:42 -0700
Subject: Problems with os.walk
In-Reply-To: <877ie52p3p.fsf@mulj.homelinux.net>
References: <mailman.738.1210231614.12834.python-list@python.org>
	<877ie52p3p.fsf@mulj.homelinux.net>
Message-ID: <o8Odnc8OtJqxaL_VnZ2dnUVZ_gydnZ2d@pdx.net>

Hrvoje Niksic wrote:
> <Dominique.Holzwarth at ch.delarue.com> writes:
> 
>>     (dirpath, dirnames, filenames) = os.walk(scriptPath)
> 
> You're supposed to loop over values in different directories, like
> this:
> 
> for dirpath, dirnames, filenames in os.walk(scriptPath):
>     ... handle dirpath with dirnames and filenames ...
> 
> The loop will be executed for each subdirectory (direct and indirect)
> of scriptPath.

And if you are simply hand-experimenting, try somthing like:
     generator = os.walk(scriptPath)
     dirpath, dirnames, filenames = generator.next()
     ...
     dirpath, dirnames, filenames = generator.next()
     ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From bruno.42.desthuilliers at websiteburo.invalid  Fri May  9 04:23:38 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Fri, 09 May 2008 10:23:38 +0200
Subject: Which way is faster for a simple web reporting system: django,
	web.py  or cgi
In-Reply-To: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>
References: <5c04fa0a-076f-475e-9147-c1295e86d62b@l42g2000hsc.googlegroups.com>
Message-ID: <48240a09$0$7184$426a74cc@news.free.fr>

idev a ?crit :
> Hi all,
> 
> May be this is a dump question, but it makes me crazy in my research.
> I am not a developer but I have experience with web development (PHP)
> in a past. Most my activities are around database administration and
> design. For most database administration tasks I am using Python. Very
> often I need to come up very quickly with web interface or web
> application to a database, more then less complicated. The standard
> set is:
> 
> * speed of the development (I think a framework is the way, but which
> one?)
> * user authorization (my preferences are sessions)
> * form validation for input data
> * file uploading
> * export data to different format like csv, pdf, xml
> 
> For example I need to create a simple reporting system. Using
> different filters like HTML drop down lists, radio buttons, check
> boxes and etc., I need to generate different output to my team and
> managers.
> 
> I realize that today is very popular and useful, using a framework.
> Which Python framework or solution will be more faster to start (i.e.
> for start, usually I have maximum two weeks, if a project looks like a
> stable I can get three, four weeks), flexible (i.e. using SQL queries
> together with views) and easier in integration: django, web.py, CGI or
> something else?

Given your background and requirements, I'd strongly recommand Django.



From aguirre.adolfo at gmail.com  Wed May  7 16:50:06 2008
From: aguirre.adolfo at gmail.com (adolfo)
Date: Wed, 7 May 2008 13:50:06 -0700 (PDT)
Subject: Looking for Fredrik Lundh; documentation and code examples for 
	elementtree
References: <7ac9f86d-d58b-4dee-b07d-e1b05390e185@e39g2000hsf.googlegroups.com>
Message-ID: <f0ac93eb-1436-4f8f-9987-5d4fe834aab5@8g2000hse.googlegroups.com>

On May 7, 4:43 pm, dj <d.a.aberna... at gmail.com> wrote:
> Hello All,
>
> I am trying to get in touch with Mr. Lundh. I am looking for exmaple
> code regarding the use of elementtree. I have read through most of the
> examples onhttp://effbot.organd I am hoping he can suggest some
> others. Additionally, I am hoping he can give me an example use of the
> comment method. I have tried a couple times, but I can not figure it
> out. Thank you so very much.
>
> DJ

Las address I had of him was: fredrik at pythonware.com good luck,
Adolfo


From jhenRemoveThis at talk21.com  Sat May 10 17:07:33 2008
From: jhenRemoveThis at talk21.com (John Henderson)
Date: Sun, 11 May 2008 07:07:33 +1000
Subject: Python, are you ill?
References: <893925d6-a4f8-4446-9bf3-475302dbaa04@j22g2000hsf.googlegroups.com>
Message-ID: <68mh4lF2rknfoU2@mid.individual.net>

wxPythoner at gmail.com wrote:

> If you are in the interactive prompt of the Python interpreter
> and you do this
> 
> print """Testing\"""   or   print '''Testing\'''
> 
> you get three dots [...] as if Python expects a code block. If
> you press Enter, you get three dots again, and again, and
> again... You can't get out of the code block with pressing the
> Enter key; you have to press Ctrl+Z (if you're in Linux) in
> order to get out of that code block, which then throws you
> back to the Linux command line, but before that it prints this
> line
> 
> [1]+  Stopped                 python
> 
> 
> If you do
> 
> print "Testing\"   or   print 'Testing\'
> 
> you get an error, but not of you use the triple quotes. Is
> that a bug in the interpreter perhaps?

>>> print """testing\"""
"""
testing"""

John


From dkcombs at panix.com  Thu May 29 20:22:36 2008
From: dkcombs at panix.com (David Combs)
Date: Fri, 30 May 2008 00:22:36 +0000 (UTC)
Subject: The Importance of Terminology's Quality
References: <f4abdb41-be28-4628-a2ad-7fb6cea6ed65@u12g2000prd.googlegroups.com>
	<b8637c52-fad4-4b96-a100-510e0228aa3f@y38g2000hsy.googlegroups.com>
	<m17ie4ltos.fsf@dot-app.org> <68i6b5F2soauaU1@mid.individual.net>
Message-ID: <g1nhcc$d5e$1@reader2.panix.com>

In article <68i6b5F2soauaU1 at mid.individual.net>,
Waylen Gumbal <wgumgfy at gmail.com> wrote:
>Sherman Pendley wrote:
>> kodifik at eurogaran.com writes:
>> >
>> > > PLEASE DO NOT | :.:\:\:/:/:.:
>> > > FEED THE TROLLS | :=.' - - '.=:
>> >
>> > I don't think Xah is trolling here (contrary to his/her habit)
>> > but posing an interesting matter of discussion.
>>
>> It might be interesting in the abstract, but any such discussion, when
>> cross-posted to multiple language groups on usenet, will inevitably
>> devolve into a flamewar as proponents of the various languages argue
>> about which language better expresses the ideas being talked about.
>> It's like a law of usenet or something.
>>
>> If Xah wanted an interesting discussion, he could have posted this to
>> one language-neutral group such as comp.programming. He doesn't want
>> that - he wants the multi-group flamefest.
>
>Not everyone follows language-neutral groups (such as comp,programming 
>as you pointed out), so you actually reach more people by cross posting. 
>This is what I don't understand - everyone seems to assume that by cross 
>posting, one intends on start a "flamefest", when in fact most such 
>"flamefests" are started by those who cannot bring themselves to 
>skipping over the topic that they so dislike.
>
>-- 
>wg 

Not one person on the planet agrees with me, I believe, but
it's always seemed to me that an *advantage* to posting to
multiple groups (especially ones generally "interested" in similar
subject matter but NOT subject to huge poster/lurker/answerer overlap,
er, without too many *people* getting multiple copies of the *same*
post) is that it would provide an opportunity of a widely-dispersed
bunch of people to have a *joint* discussion, with comments hopefully
coming in from a *variety* of viewpoints.

David





From lucaspm at dcc.ufba.br  Fri May  9 09:30:25 2008
From: lucaspm at dcc.ufba.br (Lucas Prado Melo)
Date: Fri, 9 May 2008 10:30:25 -0300
Subject: "prove"
In-Reply-To: <9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>
References: <mailman.770.1210254618.12834.python-list@python.org>
	<48240c00$0$7184$426a74cc@news.free.fr>
	<9f4be2240805090625md95b7f5x98daffa7e4f98de@mail.gmail.com>
Message-ID: <9f4be2240805090630m1fa1363ay891c65d2e4395e6@mail.gmail.com>

Thanks for all the answers. I bet I will convince this guy!


From znfmail-pythonlang at yahoo.com  Fri May 30 09:58:16 2008
From: znfmail-pythonlang at yahoo.com (Poppy)
Date: Fri, 30 May 2008 09:58:16 -0400
Subject: convert string containing list to list (or tuple) type
Message-ID: <g1p15p$4jo$1@aioe.org>

I'm reading from a database a column that has a list of codes (comma 
seperated). When I read in the list I have a single value, see code sample 
below values for a, b, and c. These represent possible values in my 
database. I need to loop through each value so I can expand my data from 
this compressed view.

My code below works and creates my desired output but I believe there must 
be a better way this is very messy. My messy function that I'd like to 
replace is lst_codes(codes). Any alternative suggestions?

this is what I begin with
a = ',P,'
b = ',I,G,AQ,ET,K,BF,'
c = ',DZ,'
this is what I want (lists or tuples are fine)
['P']
['I', 'G', 'AQ', 'ET', 'K', 'BF']
['DZ']


def lst_codes(codes):
    """ turn a string of comma seperated codes into a real list object """
    i = 0
    lstD = []
    while i < len(codes):
        a = codes[i]
        b = ","
        if (i + 1) < len(codes):
            b = codes[i + 1]
            i = i + 1
        else:
            b = ","

        if b <> ",":
            lstD.append(a + b)
            i = i + 2
        else:
            lstD.append(a)
            i = i + 1
    return lstD


a = ',P,'
b = ',I,G,AQ,ET,K,BF,'
c = ',DZ,'

for ea in (a,b,c):
    print lst_codes(ea.strip(","))




From nick at craig-wood.com  Fri May 23 09:30:08 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 23 May 2008 08:30:08 -0500
Subject: Calling class method by name passed in variable
References: <d4a6fc07-4eb8-40df-98dc-6e006f856251@l64g2000hse.googlegroups.com>
	<48366fb1$0$4879$426a74cc@news.free.fr>
	<slrng3d34k.3re.nick@irishsea.home.craig-wood.com>
	<4836b62b$0$24427$426a74cc@news.free.fr>
Message-ID: <slrng3dfn3.7jn.nick@irishsea.home.craig-wood.com>

Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>  Nick Craig-Wood a ?crit :
> > Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
> >>> Can someone suggest an efficient way of calling method whose name is
> >>> passed in a variable?
> >>>
> >>  method = getattr(obj, 'method_name', None)
> >>  if callable(method):
> >>       method(args)
> > 
> > I think that that is needless LBYL...
> 
>   From experience, it isn't.

> >    getattr(obj, 'method_name')(args)
> > 
> > Will produce some perfectly good exceptions
> 
>  The problem is that you can't tell (without reading the exception's 
>  message and traceback etc) if the exception happened in you code or 
>  within the called method.

I guess it depends on whether you are expecting it to ever fail or
not.  If a user types in method_name then yes you are right checking
stuff and producing a nice error is good.  However if it is part of
your internal program flow and you never expect it to go wrong in
normal operation then I'd be quite happy with the exception and
backtrace to debug the problem.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From stefan_ml at behnel.de  Fri May  9 06:02:04 2008
From: stefan_ml at behnel.de (Stefan Behnel)
Date: Fri, 09 May 2008 12:02:04 +0200
Subject: xml.etree Syntax of path?
In-Reply-To: <68ij33F2tl90fU1@mid.individual.net>
References: <68ij33F2tl90fU1@mid.individual.net>
Message-ID: <4824211C.8040409@behnel.de>

Thomas Guettler wrote:
> I think the documentation of xml.etree is missing something[1].
> 
> {{{
> find(path)
>     Finds the first toplevel element with given tag. Same as
> getroot().find(path). path is the element to look for.
> }}}
> 
> According to the source etree has limited support for xpath. I think it
> should be documented what 'path' should look like to.

You mean like this?

http://effbot.org/zone/element-xpath.htm

Note that the method is called "find()", not "execute_xpath()" or something.
If you want full XPath support, lxml is your friend.

Stefan


From fuzzyman at gmail.com  Sat May 24 13:10:23 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 10:10:23 -0700 (PDT)
Subject: unittest: Calling tests in liner number order
References: <slrng3d418.2u6.apardon@rcpc42.vub.ac.be>
	<af66b0d4-f77d-4d54-8ee0-94592497d2f2@l64g2000hse.googlegroups.com>
	<roy-89224C.09442224052008@70-1-84-166.area1.spcsdns.net>
	<a2c4d209-e203-4b43-aa57-f9f0248b2409@a70g2000hsh.googlegroups.com>
	<roy-0E13C2.10572924052008@70-1-84-166.area1.spcsdns.net>
Message-ID: <6b034fe0-3bc3-46d3-a8a4-09fcc0080754@j22g2000hsf.googlegroups.com>

On May 24, 3:57?pm, Roy Smith <r... at panix.com> wrote:
> In article
> <a2c4d209-e203-4b43-aa57-f9f0248b2... at a70g2000hsh.googlegroups.com>,
>
> ?Fuzzyman <fuzzy... at gmail.com> wrote:
> > Whilst I understand your point, I think the danger is that you end up
> > with hidden dependencies on the test order - which you're not aware of
> > and that the tests never expose.
>
> Well, yes. ?But, this is no worse than the current situation, where the
> tests are run in alphabetical order by default. ?You could still have
> hidden dependencies and not realize it.

Fair point. I'd still be -1 on the addition of this patch, but +1 on
the addition of a randomizer.

Michael Foord
http://www.ironpythoninaction.com/


From arnodel at googlemail.com  Thu May 15 16:44:38 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 15 May 2008 21:44:38 +0100
Subject: Making Variable Text Output More Pythonic?
References: <015e35b2-165c-4693-bf6c-38ad0cce7553@t12g2000prg.googlegroups.com>
Message-ID: <m2d4nn8fgp.fsf@googlemail.com>

Casey <casey.mcginty at gmail.com> writes:

> Hi,
>
> I have some classes that print variable outputs depending on their
> internal state, like so:
>
> def __str__(self):
>     out = []
>     if self.opt1: out += ['option 1 is %s' % self.opt1']
>     if self.opt2: out += ['option 2 is %s' % self.opt2']
>     ....
>     return '\n'.join(out)
>
> Is there any way to make this cleaner?

Maybe.

Have a dictionary of options rather than individual attributes;
options not in the dictionary are not set. E.g.

mask = {
    'opt1': 'option 1 is %s',
    'opt2': 'option 2 is %s',
    ...
    }

def __str__(self):
    return '\n'.join(mask[o] % v for o,v in self.options.iteritems())

-- 
Arnaud


From asmodai at in-nomine.org  Thu May  1 04:15:13 2008
From: asmodai at in-nomine.org (Jeroen Ruigrok van der Werven)
Date: Thu, 1 May 2008 10:15:13 +0200
Subject: best way to host a membership site
In-Reply-To: <d97d19ef-c484-44b2-b3c6-a186a0f8ca35@2g2000hsn.googlegroups.com>
References: <53034dcc-7346-4f71-889c-3278c9e813ec@w1g2000prd.googlegroups.com>
	<mailman.378.1209566587.12834.python-list@python.org>
	<d97d19ef-c484-44b2-b3c6-a186a0f8ca35@2g2000hsn.googlegroups.com>
Message-ID: <20080501081513.GH78165@nexus.in-nomine.org>

-On [20080430 17:48], Aaron Watters (aaron.watters at gmail.com) wrote:
>Wow.  An initial glance looks great!  I need help with pronunciation,
>though :(.

Werkzeug is supposed to be pronounced in German.
It translates to 'tool'.

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
????? ?????? ??? ?? ??????
http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B
Heaven can wait 'till another day...


From goldnery at gmail.com  Mon May 26 17:40:18 2008
From: goldnery at gmail.com (Gandalf)
Date: Mon, 26 May 2008 14:40:18 -0700 (PDT)
Subject: Keyboard Events
References: <14d057b1-3b62-4efb-bdb2-c20394c7268c@r66g2000hsg.googlegroups.com>
	<y7udnYZjCcI3t6bVnZ2dnUVZ_o7inZ2d@earthlink.com>
Message-ID: <1e920a06-3741-4154-94a1-73b90f659e1b@z72g2000hsb.googlegroups.com>

On May 26, 11:25 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 26 May 2008 12:06:02 -0700 (PDT), Gandalf <goldn... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > I use WX on windows XP and I try to generate an event when the user is
> > clicking the keyboard while the application frame is not in focus.
> > All I manged to do were while the application frame is in focus
> > Can someone please show me how to do it?
>
>         I'm no expert, but I think normal operation is that the operating
> system does not send events to an application unless that application
> has the focus.
>
>         To counter that, though, there is no doubt some way to inform the OS
> that an application is interested in all events, even those not meant
> for it directly.  As such a capability tends to be OS specific, it may
> not be easily exposed. Under Windows, this probably requires getting a
> handle on the "desktop window" and processing messages that it sees
> (without failing to pass them on to whatever other windows are looking
> for them)
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com              wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

Thanks!
Anyone know which library should i learn then?


From s0suk3 at gmail.com  Thu May 22 10:20:11 2008
From: s0suk3 at gmail.com (s0suk3 at gmail.com)
Date: Thu, 22 May 2008 07:20:11 -0700 (PDT)
Subject: Loading contents behind the scenes
References: <32c00225-f231-4f85-9b01-51f0fd0f9392@k13g2000hse.googlegroups.com>
	<slrng3auj7.clh.hat@se-162.se.wtb.tue.nl>
Message-ID: <cca43278-7c77-4680-b45c-0692835fedbe@x41g2000hsb.googlegroups.com>

On May 22, 8:51 am, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2008-05-22, s0s... at gmail.com <s0s... at gmail.com> wrote:
>
> > Hi, I wanted to know how cautious it is to do something like:
>
> > f = file("filename", "rb")
> > f.read()
>
> > for a possibly huge file. When calling f.read(), and not doing
> > anything with the return value, what is Python doing internally? Is it
> > loading the content of the file into memory (regardless of whether it
> > is discarding it immediately)?
>
> I am not a Python interpreter developer, but as user, yes I'd expect that to
> happen. The method doesn't know you are not doing anything with its return
> value.
>
> > In my case, what I'm doing is sending the return value through a
> > socket:
>
> > sock.send(f.read())
>
> > Is that gonna make a difference (memory-wise)? I guess I'm just
> > concerned with whether I can do a file.read() for any file in the
> > system in an efficient and memory-kind way, and with low overhead in
> > general. (For one thing, I'm not loading the contents into a
> > variable.)
>
> Doesn't matter. You allocate a string in which the contents is loaded (the
> return value of 'f.read()', and you hand over (a reference to) that string to
> the 'send()' method.
>
> Note that memory is allocated by data *values*, not by *variables* in Python
> (they are merely references to values).
>
> > Not that I'm saying that loading a huge file into memory will horribly
> > crash the system, but it's good to try to program in the safest way
> > possibly. For example, if you try something like this in the
>
> Depends on your system, and your biggest file.
>
> At a 32 bit platform, anything bigger than about 4GB (usually already at around
> 3GB) will crash the program for the simple reason that you are running out of
> address space to store bytes in.
>
> To fix, read and write blocks by specifying a block-size in the 'read()' call.

I see... Thanks for the reply.

So what would be a good approach to solve that problem? The best I can
think of is something like:

MAX_BUF_SIZE = 100000000  # about 100 MBs

f = file("filename", "rb")
f.seek(0, 2)  # relative to EOF
length = f.tell()
bPos = 0

while bPos < length:
    f.seek(bPos)
    bPos += sock.send(f.read(MAX_BUF_SIZE))


From bruno.42.desthuilliers at websiteburo.invalid  Wed May 21 07:36:37 2008
From: bruno.42.desthuilliers at websiteburo.invalid (Bruno Desthuilliers)
Date: Wed, 21 May 2008 13:36:37 +0200
Subject: Misuse of list comprehensions?
In-Reply-To: <490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
	<5fb0bcfd-0ce0-46cb-b273-7071c7694366@x35g2000hsb.googlegroups.com>
	<b56a93ee-b177-44fb-927a-1e204f491639@t54g2000hsg.googlegroups.com>
	<490e72b3-e73b-4047-be64-9880b73a958e@u12g2000prd.googlegroups.com>
Message-ID: <48340938$0$10773$426a74cc@news.free.fr>

Simon Forman a ?crit :
> On May 20, 8:58 am, Paul McGuire <pt... at austin.rr.com> wrote:
>> On May 20, 10:50 am, s0s... at gmail.com wrote:
>>
>>
>>
>>> You don't need all those conditionals. A set differs from a list
>>> precisely in the fact that each element is unique. And since the
>>> function is expecting "s" to be an iterable object, it can be
>>> constructed even without a for loop:
>>> def compress(s):
>>>     return list(set(s))
>>> That does the trick.
>> Only if order does not need to be maintained.  list(set(s)) will not
>> necessarily keep the unique characters in the order they are seen.
>> We'll have to check with the OP to see if this is important (I just
>> assumed that it was because of the use of list comps).
>>
>> -- Paul
> 
> 
> If order is important, you can use sorted() instead of list() like so:
> 
> def compress(s):
>     new = sorted(set(s), key=s.index)
>     return return ''.join(new)

This won't still preserve the *original* order.



From michele.simionato at gmail.com  Sat May 24 23:35:52 2008
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sat, 24 May 2008 20:35:52 -0700 (PDT)
Subject: class-oriented rather than object-oriented?
References: <92e76dc7-60b2-4ecd-89fc-ec6bf654fc47@y21g2000hsf.googlegroups.com>
Message-ID: <bbd54306-576b-4f7c-93e7-7dcffc5a8572@k30g2000hse.googlegroups.com>

On May 25, 4:34 am, notnorweg... at yahoo.se wrote:
> i have some confusion over this.
>
> sure a class is basically a classification, like for example an animal
> or flower. and an object/instance of that class is then for example a
> cat.
>
> an object is an instance of a class. that i know, i also know how to
> program with classes etc.
>
> i am just confused about the term object-oriented.
>
> wouldnt class-oriented be more fitting? at least for java since what
> you do is divide everything into classes.

Unfortunately there is a lot of confusion in the terminology.
Basically, everybody uses the term "object oriented" with
a different meaning. So, it is not your fault and yes, a
better name for Java would be class-oriented language.

> in python i dont or at leats not as much.
>
> does object-oriented refer to that everything(strings, ints etc) are
> all objects? so there is a class string somewhere in the
> implementation rather than a primitive or somehing?

Yes, this is the common meaning of the sentence
"everything is an object", in the sense that type(x)
gives you the class of x for any x.

> are python functions objects?

Yes.

>>> def f(x): pass
>>> type(f)
<type 'function'>

> can a functional language be object-oriented or an objectoriented
> language be functional?

Yes and not. A *pure* functional language has no mutation,
whereas the basic tenet of object orientation is having
something with a mutable state. In practice, most functional
languages are not pure, and most object oriented language
also allows functional construct.

> one definition of OO is a language that passes messages between
> objects. but not necessarily that is has to pass message sbetween
> classes?

"Passing a message" is another way of saying "calling a
method". In a language such as Python (or Smalltalk, or
Ruby) classes as objects (in the sense that they are
instances of some class, the so-called metaclass)
so you can "pass a message" to the class.
Notice that the message passing methaphor only works
with languages with single dispatch; the Common Lisp
Object System (CLOS), which is based on multiple
dispatch, goes in an entirely different category
(no message passing there). A generic function system
is not an object system in the traditional sense (I
mean the sense of Smalltalk) so it should have a
different name, but the mistake has been made twenty
years ago and there is nothing we can do now.

     Michele Simionato


From renesd at gmail.com  Thu May  1 02:02:57 2008
From: renesd at gmail.com (illume)
Date: Wed, 30 Apr 2008 23:02:57 -0700 (PDT)
Subject: Python 2.6 and wrapping C libraries on Windows
References: <Gy2Sj.3199$PM5.2653@edtnps92>
	<mailman.391.1209583197.12834.python-list@python.org> 
	<_X8Sj.3499$XI1.3261@edtnps91> <cccSj.3526$XI1.939@edtnps91>
Message-ID: <9a4cc17e-deb2-4219-a093-bff5c1a20d5e@s33g2000pri.googlegroups.com>

Hi,

after a little research it appears that win9x is not supported by the
msvcr90.dll run time.

Can you confirm this Lenard?

Has anyone tested the new python binaries that link to msvcr90.dll on
win9x machines?

cheers,




On May 1, 3:05 pm, "L. Lindstrom" <spam-t... at telus.net> wrote:
> L. Lindstrom wrote:
> > Christian Heimes wrote:
> >> L. Lindstrom schrieb:
> [snip]
> >>> [B]esides heap management and FILE pointers, is there any reason SDL, or
> >>> any C dependency, needs to link to the same C run-time as Python? If I
> >>> ensure SDL frees memory it allocates and does not directly access a file
> >>> opened by Python can I just use another C run-time such as msvcrt?
>
> >> Your analysis of the problem and the implication of mixing CRTs is
> >> correct. However ...
>
> >> It should be trivial to modify the build systemof SDL so that the
> >> manifest is integrated into the DLLs. Everything else is a hack. It
> >> *should* work and in reality it *does* work for most cases. But someday
> >> you'll hit a solid wall and get strange and hard to debug segfaults.
>
> [snip]
> > Linking to msvcr90.dll is possible with MinGW. The problem is with the
> > configure scripts. So I can run configure against msvcrt.dll, then
> > switch to mscvr90.dll for make. If this works I will make SDL and a test
> > program available on-line so someone can find the appropriate manifests.
>
> Here is my attempt to link SDL and a test program with msvcr90.dll. It
> can be found athttp://www3.telus.net/len_l/pygame. The md5sum is:
>
> f5b71d9934d35c35a24b668ad8023146 *VC-2008-Run-Time-test.zip
>
> Both lack a manifest. The test program and SDL work when a surrogate
> run-time is provided, a renamed msvcr71.dll . So if someone can show me
> the necessary manifest to make SDL use the C run-time installed by the
> Python 2.6 installer I would appreciate it. SDL is built with MinGW so I
> doubt I can distribute the run-time with it.
>
> --
> Lenard Lindstrom
> "%s@%s.%s" % ('len-l', 'telus', 'net')



From marek at xivilization.net  Tue May 13 00:32:44 2008
From: marek at xivilization.net (Marek Kubica)
Date: Tue, 13 May 2008 04:32:44 +0000 (UTC)
Subject: Python's doc problems: sort
References: <929d5ce9-9063-4e6c-98aa-89526f89fba3@y18g2000pre.googlegroups.com>
Message-ID: <g0b5lc$5jm$2@worf.visyn.net>

On Tue, 29 Apr 2008 19:48:39 -0700, xahlee at gmail.com wrote:

> Python priests: go fuck yourselfs.

In case you have something useful to add, grap the documentation sources 
of Python 2.6 (they were converted from LaTeX to reST now) and send a 
patch to the documentation maintainers. Lamenting about the Python 
documentation is no help to anyone if one is not willing to improve it.

regards,
Marek


From deets at nospam.web.de  Thu May 22 05:57:34 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 22 May 2008 11:57:34 +0200
Subject: Bug in floating-point addition: is anyone else seeing this?
References: <e315234e-0249-44e0-ba78-d2dd265dd453@a70g2000hsh.googlegroups.com>
	<b4681446-bd79-4066-aabc-fc0f854cea6d@t12g2000prg.googlegroups.com>
	<mailman.1450.1211402680.12834.python-list@python.org>
	<8187c3b6-a772-456f-a54f-0af7babb353e@w34g2000prm.googlegroups.com>
	<399b9f4e-3e36-40a5-bf02-ab2b25c1f4ef@d1g2000hsg.googlegroups.com>
	<a3d9e673-5d73-41a0-9541-d95e8646c1e8@l17g2000pri.googlegroups.com>
Message-ID: <69kudcF33qkecU1@mid.uni-berlin.de>

Dave Parker wrote:

> On May 21, 7:01?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
>> The crucial thing is not to slow down the calculations with useless
>> bells and whistles.
> 
> Are you running your simulations on a system that does or does not
> support the "useless bell and whistle" of correct rounding?  If not,
> how do you prevent regression towards 0?
> 
> For example, one of the things that caused the PS3 to be in 3rd place
> behind the Wii and XBox 360 is that to save a cycle or two, the PS3
> cell core does not support rounding of single precision results -- it
> truncates them towards 0.  That led to horrible single-pixel errors in
> the early demos I saw, which in term helped contribute to game release
> delays, which has turned into a major disappointment for Sony.

First of all - calling the PS3 technologically behind the WII (that is on
par with the PS2 wrt to it's computational power) is preposterous.

And that put aside, I don't get why a discussion about single or double
precision floats that SHARE THE SAME ROUNDING BEHAVIOR - just in different
scales - has to do with automatically adapting calculations to higher
precision numbers such as decimals or any other arbitrary precision number
format.

Diez


From dullrich at sprynet.com  Sat May 17 10:29:33 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Sat, 17 May 2008 09:29:33 -0500
Subject: "indexed properties"...
References: <dullrich-12933F.16154114052008@text.giganews.com>
	<mailman.1162.1210859996.12834.python-list@python.org>
	<7o7r245pb3kqk42odihmf95sifpbbv0rqp@4ax.com>
	<mailman.1266.1210994876.12834.python-list@python.org>
Message-ID: <hjlt245hnhrle11khpupg6fppr000f8f51@4ax.com>

On Sat, 17 May 2008 00:27:31 -0300, "Gabriel Genellina"
<gagsl-py2 at yahoo.com.ar> wrote:

>(warning: it's a rather long message)
>
>En Fri, 16 May 2008 12:58:46 -0300, David C. Ullrich  
><dullrich at sprynet.com> escribi?:
>> On Thu, 15 May 2008 10:59:41 -0300, "Gabriel Genellina"
>> <gagsl-py2 at yahoo.com.ar> wrote:
>>> En Wed, 14 May 2008 18:15:41 -0300, David C. Ullrich  
>>> <dullrich at sprynet.com> escribi?:
>>>
>>>> The other day I saw a thread where someone asked
>>>> about overrideable properties and nobody offered
>>>> the advice that properties are Bad. So maybe we've
>>>> got over that. I suppose properties could have
>>>> Bad consequences if a user doesn't know they exist
>>>> and think that a certain property of an object is
>>>> just an ordinary attribute. But that applies to
>>>> almost any aspect of any language.
>>>
>>> Which "bad consequences" are you thinking of?
>>
>> Didn't have anything specific in mind - there I was
>> just playing devil's advocate. I've seen a lot of people
>> here say things like "properties should only be used
>> when refactoring" without any explanation that I could
>> see of why properties were bad things. I was referring
>> to whatever problems they had in mind.
>
>I suppose those people were talking about this usage:
>
>   def getfoo(self): return self._foo
>   def setfoo(self, value): self._foo = value
>   foo = property(getfoo, setfoo)

Yeah. _If_ that's what I had in mind then telling me Python
is not Java would have been a great service. 

If I recall correctly (maybe not, haven't done any OP in
a long time) this is one of many things that OP gets righter
than Java: you can have the "read" or "write" for a property
refer to a method _or_ to an actual field; in the second
case access compiles to the same thing as in direct field
access.

>Just use a plain foo attribute instead. Almost nobody will notice the  
>difference, and it's faster, easier to maintain, easier to test, less  
>magic... But if you *do* have more to do besides handling the _foo  
>attribute, using a property is OK, at least for me. And from your other  
>comments, I can see it's fine for you too.
>
>>>> If a person comes from, say, Object Pascal (Delphi)
>>>> then properties are hard to live without. The
>>>
>>> You should read the article "Python is not Java" if you haven't done it  
>>> yet.
>>> http://dirtsimple.org/2004/12/python-is-not-java.html
>>
>> I suspect you misunderstood my point there. I actually read that
>> article years ago. Been using Python for years. I'd never confuse
>> it with OP, I promise (luckily I don't know any Java and don't
>> intend to). I really didn't express what I meant very well - what
>> I should have said was more like "If you're accustomed to properties
>> from a language like OP they seem like a very useful addition to
>> Python".
>
>Oh, sure. I missed them a lot until they became available in Python. And I  
>even wrote a fake property mixin class for Python 2.1 (horrible and slow!).
>Now I understand better what you're saying.
>
>>   window.pos = (x,y)
>>
>> seems more natural than
>>
>>   window.SetPos(x,y);
>>
>> in these cases the work involved in changing the cell
>> value or the window position is going to make the
>> extra overhead of the property interface irrelevant.
>
>Sure, that looks like a good candidate for using a property.
>
>>> But I prefer to have as little magic as possible on my objects: if it  
>>> says m.row[0] = [1,2,3] I
>>> expect m.row[0] to actually *be* that list (whenever possible), and not  
>>> any other object initialized
>>> from the [1,2,3] arguments. (Maybe this is some overreaction against  
>>> C++ "magic" constructors and such horrible things...)
>>
>> Whatever - the idea here is that m.row[0] is going to walk and quack
>> exactly like that list would, but also do other things that the liist
>> can't do, like you can add two of them.
>>
>> (When you say anobject.aproperty = 2 you also expect aproperty to
>> be 2? But if aproperty is a property that's not necessarily so - this
>> seems like as much an argument against properties in general as
>> against my version. Or perversion, if you like.)
>
>No, I don't necesarily expect it, but I try to maintain that behavior as  
>long as I can; I try to keep things simple and intuitive. This is a rather  
>used idiom:
>
>   items = foo.items = []
>   for x in someiterator:
>     if somecondition:
>       ...
>       items.append(x)
>       ...
>
>That works fine if foo.items is items - but if items were a property that  
>holds its own internal list, the code above would be broken. In that case,  
>replacing a simple attribute with a property would *not* be equivalent;  
>and I try to follow the "principle of least astonishment" and avoid such  
>situations as long as possible.

Right. Except that for the implementation I have in mind this
moring that code will work just fine. foo.items is going to be
a property of foo, so foo.items = [] will ...

Um. I just realized I have no idea what happens if
p = property(getp, setp) and later you say

(*)  avariable = x.p = avalue

I'd hope that this first calls x.setp(avalue) and then
executes avariable = s.getp(). One second please,
while we fire up the other machine...

No, it doesn't do that.

Again, this doesn't have anything to do with lists,
it seems an unfortunate astonishment regarding
properties in general. If p is an attribute then the
effect of (*) is the same as x.p=value; avariable = x.p
but if p is a property that's not so.

In the implementation I have in mind I don't see
how there's going to be any astonishment other
than astonishments that can arise with properties
in general.

Ok, that was your point - even if p is a property
you'd prefer that x.p = value store value and
possibly do other things as well, instead of
storing something other than value.

(I _have_ been astonished at how unastonishing
my Rows are, for example I was surprised to see
that

  def __add__(self, other):
    return Row([x + y for x, y in zip(self, other)])

worked as hoped if self is a Row and other is a
Row _or_ a list.)

Anyway, my m.rows[j] can't be a list, because
I want to be able to say things like
m.rows[0] += c*m.rows[2]. Allowing 
m.rows[j] = [1,2,3] seems convenient, while
requiring m.rows[j] = Row([1,2,3]) fixes
this problem. Hmm.

>(I think that in OP the equivalent of m.row[0] = [1,2,3] isn't very usual  
>- mostly because there isn't a list literal, I presume)
>
>> _A_ workaround would be to simply not have indexedproperties
>> be class attributes, instead saying self.whatever =
>> indexedproprty(whatever) in __init__.
>
>Unfortunately that doesn't work. 

As I found when I tried it. Then I read the docs again a little
more closely...

>Properties get their "magic" when  
>searched in the class namespace - a property set as an instance attribute  
>doesn't behave as a property at all, it's just an attribute as any other.
>
>>> class Matrix2x2(object):
>>>   def __init__(self):
>>>     self.cells = [[0,0], [0,0]]
>>>
>>>   def __setitem__(self, (row, col), value):
>>>     self.cells[row][col] = value
>>>
>>>   def __getitem__(self, (row, col)):
>>>     return self.cells[row][col]
>>>
>>> class AClass(object):
>>>   def __init__(self):
>>>     self.cell = Matrix2x2()
>>
>> Well, something like this is where I was before coming up with
>> the indexedproperty thing. Unless I'm missing something, which
>> has happened before, what you write above can't work, because
>> self.cell has to know what Matrix2x2 created it so it knows
>> what AClass instance to modify when it's modified. (No, we
>> can't just leave the state information in self.cells; think of the
>> case of a Matrix with a row[] property and also a col[]
>> property - they have to be modifying the data stored in
>> the owning matrix.)
>
>The above class works fine in the simple cases I tested it - including the  
>bug involving two AClass instances. Adding "row" and "col" views is rather  
>simple:
>
>class AClass(object):
>   def __init__(self):
>     self.cell = Matrix2x2()
>     self.row = ViewAsRow(self.cell)
>     self.col = ViewAsCol(self.cell)
>
>class ViewAsRow(object):
>   def __init__(self, matrix):
>     self.cells = matrix.cells
>
>   def __getitem__(self, index):
>     return self.cells[index][:]
>
>   def __setitem__(self, index, row):
>     self.cells[index][:] = row
>
>class ViewAsCol(object):
>   def __init__(self, matrix):
>     self.cells = matrix.cells
>
>   def __getitem__(self, index):
>     return [row[index] for row in self.cells]
>
>   def __setitem__(self, index, col):
>     for row, value in zip(self.cells, col):
>       row[index] = value
>
>There is no need for the ViewAsCol nor ViewAsRow classes to know they're  
>being used inside an AClass instance. 

Well, no. But they do need to preserve that reference to that
Matrix2x2 object.

>(A better design would avoid to use  
>matrix.cells - but I was constrained by the original Matrix2x2 design that  
>I didn't want to modify.)
>
>> (again, it doesn't have to be like that in this case,
>> but it does in the case where various "properties"
>> like cells are giving different sorts of access to the
>> same data, which data then has to be stored in AClass.)
>
>But you may have many references to the *same* data and view it in  
>different ways - you don't have to walk thru the intermediate AClass  
>"container" because AClass doesn't "store" data; the data is "stored" in  
>the list itself, AClass instances only contain the name "cell" bound to  
>the Matrix2x2 object.

Well of course. My point was just that it had to be somewhat
more complicated than the original code you gave if we wanted
to have two views of the same data. 

>In OP terms, all objects in Python act like those inheriting from TObject,  
>not like basic types (numbers, char, string...). An important difference  
>is that Python takes care of automatic object deletion when they're no  
>longer used, but in OP you have to manage the object's lifetime yourself.  
>So in OP it is important *who* owns some object; and sharing a TList  
>instance -by example- isn't so frequent because when the list is freed all  
>its references become invalid (so one needs some kind of notification...)
>In Python, on the other side, many objects may have a reference to the  
>same other one, like the Matrix above - it won't disappear until nobody  
>else references it. This sharing behavior may be a Good Thing or a Bad  
>Thing, depending on the circumstances. By example, the ViewAsRow class  
>above *could* return an actual list from the Matrix2x2 instance, but I  
>choose not to, to emphasize that it's a *view* of the underlying data  
>(else, modifications to the returned list would alter the data itself).
>
>> And then that's the point to the indexedproperty;
>> the code passing data back and forth doesn't need
>> to be rewritten with each property, it's all done
>> inside the implementation of the indexedproperty
>> class. I realized that I could just use object attributes
>> instead, but it seems to me that indexedproperty
>> encapsulates the data-passing protcol once and for
>> all instead of requiring it to be redone each time.
>
>I don't understand what you call "data-passing protocol"; as far as I can  
>tell, there is no data-passing, only names refering to the same and unique  
>object instance.

I didn't say what I meant very well. Your ViewAsRow does require
a reference to data held elsewhere; that reference has to be passed
in the constructor and used in __get/setitem__.

I think what I should do is set something up like your thing
above (except that in fact there's no reason for AClass,
it's actually Matrix I care about, AClass just crept into the
discussion because it was in the trivial example in the original),
modified so it stores a list of Row objects instead of a list of
lists.

Then concoct an indexedattribute class (ignoring descriptors) 
that lets me say

class Matrix2x2(object)
  def __init__(self, data):
     ...
     self.rows = indexedattribute(self.getrow, self.setrow)
     self.cols = indexedattribute(self.getcol, self.setcol)

  def getrow(self, index)
    ...

and then compare the two. I suspect that the second
Matrx2x2 is going to be simpler because of things
handled automatically by the indexedattribute class
(counting the code in that class as part of the 
"complexity" doesn't count, since I only write that
class once and get to use it for my matrices and
also my wxGrids...)

Don't hold your breath, I have other things to do
in the next few days. Thanks again for pointing
out the bug in the original. (It might never have
come up - I don't see why I'd use a cell in one
matrix as an index to another matrix. But regardless
it makes the original totally unacceptable, and
if it _did_ come up when I was using it it would
have taken me some time to figure out what the
problem was...)
David C. Ullrich


From corvettecraz92 at gmail.com  Sat May 31 14:44:14 2008
From: corvettecraz92 at gmail.com (corvettecraz92 at gmail.com)
Date: Sat, 31 May 2008 11:44:14 -0700 (PDT)
Subject: Question about files?
Message-ID: <3a260685-b285-43ef-9e2c-c42cfbd4c497@y38g2000hsy.googlegroups.com>

I want to create a program where a user can type what ever they want
to, have it saved to a file, and the be able to re-open it and read
it. How would I do this? Thanks!


From grante at visi.com  Mon May 12 13:50:35 2008
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 May 2008 12:50:35 -0500
Subject: do you fail at FizzBuzz? simple prog test
References: <39709320-66e1-40e9-a351-c769c9a94585@x41g2000hsb.googlegroups.com>
	<g05sh1$20fo$1@news.mtu.ru> <g05ta2$20fo$2@news.mtu.ru>
	<Xns9A9C83F62CA39duncanbooth@127.0.0.1> <48283881@news.mel.dft.com.au>
	<bda97bdd-28d1-4f19-a355-ef312cfb1a41@b1g2000hsg.googlegroups.com>
	<c16029bf-dc37-4975-86c0-b61b4a99fe6a@j22g2000hsf.googlegroups.com>
Message-ID: <1emdnZPhZ6L2HrXVnZ2dnUVZ_j2dnZ2d@posted.visi>

On 2008-05-12, Paul Hankin <paul.hankin at gmail.com> wrote:

> for i in xrange(1, 101):
>     print 'Fizz'*(i%3<1)+'Buzz'*(i%5<1) or i

Doh!  It never occured to me that 'string' * 0 == ''.

-- 
Grant Edwards                   grante             Yow! An air of FRENCH FRIES
                                  at               permeates my nostrils!!
                               visi.com            


From ohad911 at gmail.com  Sat May 24 07:57:37 2008
From: ohad911 at gmail.com (ohad frand)
Date: Sat, 24 May 2008 14:57:37 +0300
Subject: problem with import / namespace
In-Reply-To: <483474E8.8090708@shopzeus.com>
References: <b0d9688e0805210451t1d8389ccj1a7d0e8528c7dc3c@mail.gmail.com>
	<483427BF.6030805@shopzeus.com>
	<b0d9688e0805210745o2740d022r615b1a4092a38e6e@mail.gmail.com>
	<483474E8.8090708@shopzeus.com>
Message-ID: <b0d9688e0805240457r77716c56y94e9b71bf8de5ed9@mail.gmail.com>

Hi Laszlo

Thanks for your reply but it stil didnt work:
i opened python shell, changed active directory to \\one and imported tmp1.
now the correct file is loaded.
now i deleted tmp1
i dir os.chdir(\\two) and imported tmp1 again. now the incorrect file is
loaded (the same one as before).
i did one more trial with sys.path insted of os.chdir() and it didnt work
either (sys.path.append(\\one), import tmp1, del tmp1, sys.path.remove(\\one),
sys.path.append(\\two), import tmp1)
can you please try to do so and see for yourself that something is wrong
here.

The reason why i am not using other names is because i am triyng to build
something that will execute external sw and for that i have no control of
the names of the modules, but this is not important, because python must
give us a way to clear previously imported module

Thanks again
Ohad


On 5/21/08, Laszlo Nagy <gandalf at shopzeus.com> wrote:
>
> ohad frand wrote
>
>> Hi
>> Thanks for the answer.
>> I probably didnt write the problem accurately but it is not as you
>> described.
>> (i already read before the section that you pointed and it didnt help me)
>> the problem is that i dont want to import a file from different directory
>> but only from the same directory.
>> \\1\tmp2.py imports \\1\tmp1.py
>> \\2\tmp2.py imports \\2\tmp2.py
>> but when i execute the following script in the interpreter i get that the
>> second tmp2.py file imports not the file from the same directory but the
>> file that was already imported by the first executed tmp2.py file.
>>
> I think that using absolute names DOES solve the problem.
>
> import two.tmp2  # This will import tmp2.py in "two" folder for sure!
>
> >>> execfile("tmp2.py") <- here the executaion is OK
>> >>> os.chdir("c:\\2")
>> >>> execfile("tmp2.py") <- here the execution is not ok because tmp2.py
>> file imports the tmp1.py file from c:\\1 which is not OK
>>
> Hmm looks like your tmp2.py file is not a module but a whole program. No
> wonder I could not understand you - I thought that "tmp2.py" is a module,
> not a program.
>
> The answer in this case: if tmp2.py is a program then you should either
> manipulate sys.path or chdir to the containing dir, as I told in my former
> post. ( os.split(os.abspath(__file...))) -> then chdir or
> sys.path.insert(0,mydir) )
>
> in between those two execfile commands i tried to do a lot of things but
>> every time python imported the incorrect file for the second execution. (i
>> am not building a package and those names are just examples for the problem,
>> i am not really using 1 and 2 names as dirs)
>>
> Why do you need execfile?
>
>  Laszlo
>
>
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From saikia at unspokenmind.net  Thu May  8 12:07:43 2008
From: saikia at unspokenmind.net (Amitabh Saikia)
Date: Thu, 8 May 2008 09:07:43 -0700
Subject: Running a python code periodically
In-Reply-To: <ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
References: <ee9cd3be0804081053x5c6a0403r31dd6ac47e47f697@mail.gmail.com>
	<ee9cd3be0805080902g48e641bxbcf1d5578620defe@mail.gmail.com>
Message-ID: <237596740805080907x3546ea8q72cf49a80b6ae18e@mail.gmail.com>

write a bash script(to run your program at intervals) and run the bash
script with nohup

- saikia at unspokenmind.net

On Thu, May 8, 2008 at 9:02 AM, Maryam Saeedi <ma.saeedi at gmail.com> wrote:

> I was wondering if you know how can I run a python code once every five
> minutes for a period of time either using python or some other program like
> a bash script.
>
> I have asked this question before and some of you answered me but I still
> have problem. Most of the answers was to use cron and crontab which works on
> my computer but not if I want to do it on department's computer since I do
> not have permission to change those files. Is there any other way which does
> not need administrator permission?
>
> Thanks  a lot,
>
> Maryam
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ohad.frand at percello.com  Tue May 13 03:11:57 2008
From: ohad.frand at percello.com (Ohad Frand)
Date: Tue, 13 May 2008 10:11:57 +0300
Subject: question about python statements
Message-ID: <B9E129828E47994B9B95E1BAABC8868C0B8F22@percello-sbs.percello.local>

Hi Gary

Sorry that I was not clear, I hope that this time I will explain myself
better.

I can get list of all builtin functions in python by dir(__builtins__).
This return a list of string with most known names to python language
such as: 
[... 'issubclass', 'iter', 'len', 'license', 'list', 'locals', 'long',
'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow', 'property',
'quit', 'range', 'raw_input', 'reduce', 'reload'...]

But I don't know how to generate the next list of builtin python
statements:
['assert','break','class','continue','def','del','elif','else','except',
'exec','finally','for','from','global',
'if','import','pass','print','raise','return','try','while','yield']

Thanks,
Ohad Frand

-----Original Message-----
From: Gary Herron [mailto:gherron at islandtraining.com] 
Sent: Monday, May 12, 2008 10:41 PM
To: Ohad Frand
Cc: python-list at python.org
Subject: Re: question about python statements

Ohad Frand wrote:
>
> Hi
>
> I am looking for a way to programmically get a list of all python 
> existing statements that I cannot access by __builtins__ or locals()
>
> (like ["assert","break","class",...])
>
> Thanks,
>
> Ohad
>
>
------------------------------------------------------------------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
Sorry, I've no idea what you mean here. Perhaps you could help us by 
defining what you mean by
"statements that I cannot access by __builtins__ or locals()"

Is there any statement that you *can* access in such a way?

What does it even mean to "access a statement"?

Do you even have a list of "statements" from which we are to work? 
Python is a little unusual in what it considers statements.

Gary Herron






From sturlamolden at yahoo.no  Thu May 22 19:01:14 2008
From: sturlamolden at yahoo.no (sturlamolden)
Date: Thu, 22 May 2008 16:01:14 -0700 (PDT)
Subject: ctypes help
References: <6a3247f6-3ea2-4c8c-b66b-43f31878fb01@z72g2000hsb.googlegroups.com>
Message-ID: <2b32a589-5e72-407a-aa7b-f98d1156c70b@s50g2000hsb.googlegroups.com>

On May 23, 12:33 am, gianluca <geonom... at gmail.com> wrote:
> Hy,
> I need help about use dll with ctypes. I've compiled my dll C library
> and I copied it in c:\windows\system32. When I load it with
> "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> python don't see the dll function. with dir(myDLL) I've only this:
> ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> '_name']

I see nothing wrong here.








From johnjsal at NOSPAMgmail.com  Tue May 20 13:25:07 2008
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 20 May 2008 13:25:07 -0400
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<4832dbd0$0$23017$426a74cc@news.free.fr>
Message-ID: <027e0c78$0$26938$c3e8da3@news.astraweb.com>

"Bruno Desthuilliers" <bruno.42.desthuilliers at websiteburo.invalid> wrote in 
message news:4832dbd0$0$23017$426a74cc at news.free.fr...

>> def compress(s):
>>     new = []
>>     [new.append(c) for c in s if c not in new]
>>     return ''.join(new)
>
> As far as I'm concerned (and I'm a big fan of list-comps, generator 
> expressions etc), this is definitively an abuse. And a waste of resources 
> since it builds  a useless list of 'None'.

I agree with you. After being proud of myself for about 20 seconds, it 
suddenly seemed like an abuse rather than a clever way to do it in one line. 
:) It just looked wrong to have a list comp. without an assignment, etc.

Actually, though, I wasn't so much thinking of the waste of resources as I 
was that what was happening didn't seem to be explicit or evident enough. So 
despite the fact that the for loop with the nested if is the exact same 
code, it just seems more appropriate. 




From Ludwig at armand-miniatur.de  Tue May 20 14:52:30 2008
From: Ludwig at armand-miniatur.de (Ludwig Miniatur)
Date: Tue, 20 May 2008 11:52:30 -0700 (PDT)
Subject: What's wrong with that comment?
Message-ID: <aea9a0a4-35b3-4e35-a45e-9b2a6f0ab4d0@q24g2000prf.googlegroups.com>

Hi, I ran into a funny thing when I played with the python parser, to
build a python call graph for learning...

When I have a (special) python program, that runs without any error it
gives an error, when I try to parse it parser.suite. The error is,
when my program has a comment on the last line after an indented
block. Note that there no newline behind "# comment". With a newline
everything is fine.

For example:
#!/usr/bin/env python

from parser import suite, ast2list
fh = file(__file__)
s = fh.read()
fh.close()
ast = suite(s)

while False:
  print "hello world"
# comment

Looks like a little bug in parser; but what I don't understand is that
I thought parser was build with the current syntax of python.

So, why can python run the script (an it can if you comment out the
line "ast = suite(s)") but parser can't?

Looking forward for answers...

Ludwig


From george.f.rice at gmail.com  Sun May 11 07:48:01 2008
From: george.f.rice at gmail.com (george.f.rice at gmail.com)
Date: Sun, 11 May 2008 04:48:01 -0700 (PDT)
Subject: Some error messages in Python are ugly
References: <1af83e8f-8083-4b5d-95e1-534193d059e5@24g2000hsh.googlegroups.com>
Message-ID: <79906098-5b9b-48f3-a5fe-19ab73b011e7@e39g2000hsf.googlegroups.com>

On May 11, 3:10 am, wxPytho... at gmail.com wrote:
> This really looks ugly for an error message:
>
> [1]+  Stopped                 python
>
> Please explain to me the role of the '+' sign. And why is there such a
> gap between 'Stopped' and 'python'?

I suspect you were running the python command line in a Linux shell
such as bash, and pressed Control-Z.

The message you list above is NOT an error message from Python, but
rather an informational message from the Linux shell. The short answer
is to type "fg" and press Enter twice, and Python will resume
executing.

Here's the long answer.

This message from the Linux shell is telling you that the python
process (application) has been stopped, and is no longer executing.
"[1]" tells you the job number; Linux supports  multiple stopped jobs,
and gives each a number to make it easy for you to give them
commands.  "+" tells you that this is the "active job"; it's at the
top of the queue, and is the job that will respond to your job-related
commands by default (i.e., if you don't supply a job number).

You can list all jobs in the queue by typing "jobs" at the Linux shell
prompt. You can begin running the "active job" again by typing fg
(which means "foreground"); you could also switch the "active job" to
running in the background by typing bg, although that wouldn't be
useful with the Python shell.

You can learn more about managing jobs from the Python shell here:
http://www.slackbasics.org/html/chap-procmgmt.html

Great question!




From wuwei23 at gmail.com  Thu May 22 04:37:43 2008
From: wuwei23 at gmail.com (alex23)
Date: Thu, 22 May 2008 01:37:43 -0700 (PDT)
Subject: Returning to 'try' block after catching an exception
References: <Xns9AA6C693A2A6mosornet@161.53.160.65>
	<485f7ddc-8f50-4483-b591-151f1ae560be@k10g2000prm.googlegroups.com>
	<Xns9AA6686AEABB8mosornet@161.53.160.65>
Message-ID: <b3680690-73c3-47cb-8693-54a207daafcd@x1g2000prh.googlegroups.com>

On May 22, 6:15 pm, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> Because when you expect exception to occur on something like 0.01% of
> cases, and you have 4 or 5 exceptions and the code to test for each
> conditions that cause exceptions is quite long and burried deep inside
> some other code it's much better to do it this way ;). Too bad there's no
> syntactic sugar for doing this kind of try-except loop.

I'm surprised your unit tests let it get to such a state... ;)

How about something like this?

    retry, total_fail = False, False
    try:
        some_function()
    except SomeException:
        some_function2()
        some_function3()
        retry = True
    finally:
        if retry:
            try:
                some_function()
            except SomeException:
                total_fail = True

Using 'finally' seems more explicit about it being part of the
exception handling than using a loop construct.

Actually, this is even more direct:

    try:
        some_function()
    except SomeException:
        some_function2()
        some_function3()
        try:
            some_function()
        except SomeException:
            raise SomeError


From venkat83 at gmail.com  Thu May 15 23:39:06 2008
From: venkat83 at gmail.com (Venkatraman.S.)
Date: Thu, 15 May 2008 20:39:06 -0700 (PDT)
Subject: managing properties/configurations
Message-ID: <408a6c83-8869-4c76-9acf-48cd42075658@y22g2000prd.googlegroups.com>

Hi,

Am sure many would have stumbled on this situation while developing an
application in Python which is highly driven by configuration/
properties.

I have an application (obviously written in Python) wherein the
properties change frequently and the program needs to work according
to the new rules. Since , python is scripting language the idea of a
Properties file(analogous to Java) doesnt make sense to me. However,
at the same time i am looking for some mechanism by which the hot-
patches(i.e, properties can be changed) can be applied easily.

Since the patches(mostly properties change) will be mostly be done by
non-programmers, i do not want them to touch the Py codes,but at the
same time alter the behaviour suitably.(Kindly avoid the advice to
teach Python to the non-programmers :D ).

The following is a *very simple example* of the case wherein the
properties(namely 10,30,31,40) are 'hardcoded' - i want this to be
'away' from the code.

def checkCutoff(self,up,down):
       .............do some processing........
       if (10 <= score <= 30):
       		result="Bad"
       elif (31 <= score <= 40):
       		result="Good"
       .............do some processing........
       return result

If i have to have this as a separate script that stores all the
properties, then how do I make the program fetch the new values
without restarting.

Also, i would be interested in providing a GUI for manging the
properties so that the changes can be applied even more easily - but
at any time i do not want to bring down the program and then
restart(all are hot patches).

Regards,
Venkat


From krumblebunk at gmail.com  Tue May  6 09:37:00 2008
From: krumblebunk at gmail.com (krumblebunk at gmail.com)
Date: Tue, 6 May 2008 06:37:00 -0700 (PDT)
Subject: Comparing strings - akin to Perl's "=~"
References: <eed85242-feda-491b-bca6-d49999b71de1@v26g2000prm.googlegroups.com>
	<slrng20mun.1cu.hat@se-162.se.wtb.tue.nl>
Message-ID: <9a836897-7454-4ddf-b93f-da7b34955389@q27g2000prf.googlegroups.com>

On May 6, 2:23 pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:

....

> Without a explicit Python value of what comes out of the sql query, I can only
> guess. As example, assume the following data:
>
> f = { 1: ['Hostname', 'blabla', 'person', 'john'],
>       2: ['MachineName', 'blabla', 'company', 'something']}
>
> ie a dictionary of column number to rows.
>
> Here you are only interested in the value part, and the code becomes.
>
> for v in f.itervalues():
>   if v[0].startswith('Hostname'):
>      print v[3]

Many thanks for all your replies - this last snippet of code helped
me, extra thanks!

kb.


From ptmcg at austin.rr.com  Sat May 24 09:58:38 2008
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 24 May 2008 06:58:38 -0700 (PDT)
Subject: Assignment and comparison in one statement
References: <esujg5x5u5.ln2@joeserver.homelan.net>
	<10f19bee-1e0a-4401-a03b-18c458388297@s50g2000hsb.googlegroups.com>
	<dp9lg5xvm8.ln2@joeserver.homelan.net>
Message-ID: <d47e9c74-d1c1-4305-86e2-1334ab886e4e@d77g2000hsb.googlegroups.com>

On May 24, 6:12?am, Johannes Bauer <dfnsonfsdu... at gmx.de> wrote:
> Carl Banks schrieb:
>
> > p = myfunction()
> > if p:
> > ? ? print p
>
> > (I recommend doing it this way in C, too.)
>
> This is okay for if-clauses, but sucks for while-loops:
>
> while (fgets(buf, sizeof(buf), f)) {
> ? ? ? ? printf("%s\n", buf);
>
> }
>
> is much shorter than
>
> char *tmp;
> tmp = fgets(buf, sizeof(buf), f);
> while (tmp) {
> ? ? ? ? printf("%s\n", buf);
> ? ? ? ? tmp = fgets(buf, sizeof(buf), f);
>
> }
> > For the case where you want to do this in an elif-clause, look for the
> > recent thread "C-like assignment expression?" which list some
> > workarounds. ?Or just Google this newsgroup for "assignment
> > expression". ?It's one of few minor irritating things in Python
> > syntax.
>
> Alright, I will. Thanks.
>
> Regards,
> Johannes
>
> --
> "Wer etwas kritisiert muss es noch lange nicht selber besser k?nnen. Es
> reicht zu wissen, da? andere es besser k?nnen und andere es auch
> besser machen um einen Vergleich zu bringen." ? ? - ? ? Wolfgang Gerber
> ? ? ? ?in de.sci.electronics <47fa8447$0$11545$9b622... at news.freenet.de>

I posted this to the other thread, but I'm afraid it might get buried
over there.  See if this works for you.

class TestValue(object):
    """Class to support assignment and test in single operation"""
    def __init__(self,v=None):
        self.value = v

    """Add support for quasi-assignment syntax using '<<' in place of
'='."""
    def __lshift__(self,other):
        self.value = other
        return self

    def __bool__(self):
        return bool(self.value)
    __nonzero__ = __bool__


import re

tv = TestValue()
integer = re.compile(r"[-+]?\d+")
real = re.compile(r"[-+]?\d*\.\d+")
word = re.compile(r"\w+")

for inputValue in ("123 abc -3.1".split()):
    if (tv << real.match(inputValue)):
        print "Real", float(tv.value.group())
    elif (tv << integer.match(inputValue)):
        print "Integer", int(tv.value.group())
    elif (tv << word.match(inputValue)):
        print "Word", tv.value.group()

Prints:

Integer 123
Word abc
Real -3.1

In your examples, this could look like:

tv = TestValue()
while (tv << fgets(buf, sizeof(buf), f)) {
         printf("%s\n", tv.value);

or:

if (tv << myfunction()):


What do you think?  Is '<<' close enough to '=' for you?

-- Paul


From Dominique.Holzwarth at ch.delarue.com  Thu May 29 05:29:00 2008
From: Dominique.Holzwarth at ch.delarue.com (Dominique.Holzwarth at ch.delarue.com)
Date: Thu, 29 May 2008 10:29:00 +0100
Subject: Easy install / setuptools
Message-ID: <5213E58D85BC414998FA553C701E386C0EF286455F@SGBD012511.dlrmail.ad.delarue.com>

Hi everyone

I'm trying to figure out the "best" way to distribute my own python packages. Basicly, what I want is to have something like an "installer.exe" (on windows) which puts my package under Python/Lib/site-packages (so that it can be found via the PYTHONPATH).

I've played around a bit with "easy install" and "setuptools" and the .egg format. I've already managed to create a "myPackage.egg" file with setup tools and "install" (it's just a copying) it ito the site-packages directory using "easy install".

What I was wondering now is if there's a way to actually EXTRACT the egg file and put the extracted file (i.e. the .py file) under site-packages. And not the .egg?

The problem with egg files is that you can't use "open(os.path.join(os.path.dirname(__file__),'myFile')" and I'd need to rewrite such code which I'd like to avoid if possible. Also, I don't know whether leaving the python scripts packed inside the egg file is slower for execution or not...

Would be cool if someone could give me some inputs on how to distribute python packages in an easy and effective way :-)

Thx in advance
Dominique


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From marco at sferacarta.com  Thu May  8 10:46:24 2008
From: marco at sferacarta.com (Marco Mariani)
Date: Thu, 08 May 2008 16:46:24 +0200
Subject: source beautifier
Message-ID: <8nEUj.36510$o06.32727@tornado.fastwebnet.it>


Is there a program (free, payware, whatever) like polystyle for 
linux/python?

http://www.polystyle.com/features/python-beautifier.jsp

I've never used it, but the example is quite clear.
I just need it for python -- but it should not force me to use PEP8.



From saluk64007 at gmail.com  Thu May  1 13:44:13 2008
From: saluk64007 at gmail.com (Patrick Mullen)
Date: Thu, 1 May 2008 10:44:13 -0700
Subject: Best way to store config or preferences in a multi-platform way.
In-Reply-To: <fvcuo9$31i9$2@news.mtu.ru>
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<790cec6c-b057-4a2d-bc2c-e683630c1127@w7g2000hsa.googlegroups.com>
	<fvcuo9$31i9$2@news.mtu.ru>
Message-ID: <c3f69bf60805011044o5bfbcd81pd6d8d6766a5c820a@mail.gmail.com>

YAML is a joke if you expect a windows user to be able to hand edit the
data.  Windows users typically expect a .ini file in the application's
directory.  (Usually not the users home directory, even if that may be a
better location).  XML is ok, but .ini is much preferred.

If you have a configuration gui or whatever and the file doesn't need to be
hand edited, it doesn't really matter what format you store it in.  Sqlite
db would be fine in this case.  Still keep the file as a ".yourappname" file
in users home linux directory, and probably do as mentioned above and keep
it in their windows home directory.
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From deets at nospam.web.de  Tue May 13 12:38:32 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 May 2008 18:38:32 +0200
Subject: Python and Flaming Thunder
References: <567f7222-ac10-42aa-8105-0654f63368e6@h1g2000prh.googlegroups.com>
	<2b66a86e-5a05-4262-b3c9-4703b0ae3372@d1g2000hsg.googlegroups.com>
	<eaf60fc6-d335-4ab9-a14e-0a9ea3ed7c30@i36g2000prf.googlegroups.com>
	<a63ee547-f9c4-499d-83d9-106e018a69c2@59g2000hsb.googlegroups.com>
	<bc33c240-aa8f-4ad0-a009-c53b2dd84c40@y22g2000prd.googlegroups.com>
	<5b0e3f70-afde-4480-8713-e7113b1250d7@x35g2000hsb.googlegroups.com>
	<1f537717-00d0-48ee-99b6-7125b96a6133@t12g2000prg.googlegroups.com>
	<68t4o0F2vaoncU1@mid.uni-berlin.de>
	<dc68e5ab-ff38-4d4c-9362-139e75c38768@x19g2000prg.googlegroups.com>
	<2a32179a-9439-449c-bd07-fff6a4075aee@s50g2000hsb.googlegroups.com>
	<7ee5dffd-df8f-46f0-bd78-c81ac0418a9a@d77g2000hsb.googlegroups.com>
	<65ef773e-a1c3-4adb-a18b-e8b8451efe5e@b5g2000pri.googlegroups.com>
	<68trmmF2vjivnU1@mid.uni-berlin.de>
	<f6625824-b556-41c2-986e-4b1f32df5434@n1g2000prb.googlegroups.com>
Message-ID: <68tuhfF2unducU1@mid.uni-berlin.de>

> True.  But in Python, you don't see statically-linked pure-syscall CGI
> scripts being cross-compiled under Windows for ftp'ing up to a Linux
> server.  And you don't see the speed of pure assembly language
> libraries.  And I'll be willing to bet that Flaming Thunder will have
> OO features similar to Python before Python has the features that
> Flaming Thunder already does.

Your bets don't count anything here. These things don't exist, so don't brag
on them being superior.

> For many people, being 5 to 10 times faster at numerical analysis and
> CGI scripting is reason enough to pay $19 per year.  But maybe for
> other people, having slow, inefficient programs and websites is
> acceptable.

Quite a revealing statement I'd say. And unless you don't show any
real-world site running on FT that needs things like sessions, cookies,
database-connectivity, unicode and a ton more of stuff FT doesn't support
out-of-the-box or through 3rd-party-libs, I wouldn't mention "the people"
as well. So far, *all* that you've been showing on your site regarding CGI
are toy-scripts. Nothing more.

>> And what is really expensive is brain-cycles, not cpu-cycles.
> 
> Depends on whether you're the programmer, or the customer.  I've found
> that customers prefer products that are 5 to 10 times faster, instead
> of products that were easy for the developer.

This shows how much you don't know about customers, and their needs. A
customer gives a s**t about 5-10 times faster sites. They care if it is
*fast enough*, but beyond that they don't bother. But what *always* bothers
them is development time & flexibility. Because that directly affects the
price they pay.

And if a average man-day costs $600 (which is not expensive), and the
project is of average size of a couple of man-months - well, you care about
mathematics, do the math yourself what that means that FT lacks anything
but a simple CGI-interface. 

> And I disagree that Flaming Thunder requires more brain-cycles.
> Because it's based on leveraging existing English and math fluency
> (which was one of the original goals of Python, was it not?), I think
> that Flaming Thunder requires fewer brain-cycles because fewer brains
> cells have to be devoted to memorizing language peculiarities.

It does require more, because it lacks all the libs and 3rdparty-libs. And
because it lacks features such as OO and other stuff, it will be harder to
write these as well as use them.

Show me how to beat a quickstarted TurboGears/Django webproject. *Then* you
can talk business here.

> Perhaps.  But if elementary school students can easily understand why
> one programming language gives the answer 100 (Flaming Thunder):
> 
>   Write 10^2.
> 
> but can't understand why another programming language gives the answer
> 8 (Python):
> 
>   Print 10^2
> 
> then I think the comparison moves beyond a matter of taste into the
> realm of measurable ease-of-use.

Who has conducted the research that supports that statement? And since when
is ^ the better operator for "to the power of" that **? Because latex uses
it? I need to see the elementary school students who use that...

Even *if* that would be true, how does a perceived advantage in one field FT
was explicitly created for show that it is the generally better one and
understandable one for more diverse applications?


Diez



From bronger at physik.rwth-aachen.de  Fri May  2 00:53:18 2008
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 02 May 2008 06:53:18 +0200
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com>
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<fvckui$303g$1@news.mtu.ru>
	<slrng1jqth.ltk.jon+usenet@snowy.squish.net>
	<fvctcg$31i9$1@news.mtu.ru>
	<slrng1k5i4.rtj.jon+usenet@snowy.squish.net>
	<fvd91r$1g2$1@news.mtu.ru> <878wytvis5.fsf@physik.rwth-aachen.de>
	<fvdg2b$3ep$1@news.mtu.ru> <874p9hvce5.fsf@physik.rwth-aachen.de>
	<fvdmp8$3ep$3@news.mtu.ru>
Message-ID: <87zlr9tigx.fsf@physik.rwth-aachen.de>

Hall?chen!

Ivan Illarionov writes:

> On Fri, 02 May 2008 01:21:38 +0200, Torsten Bronger wrote:
>
>> [...]
>> 
>> In contrast to many other areas of software, configuration files
>> needn't be compatible with anything except the user's brain.  So
>> even if the rest of the world uses config format X, you can
>> safely stick with config format Y.
>
> There are several reasons for compatibility:
>
> 1. The user or another developer might want to write GUI front-end
> to configure your app. With standard format this would be easier.

The libraries are there after all -- I don't speak about an own
format.

> [...]
>
> 3. Bigger applications that include your sofware as one of its
> components may need to automate configuration process and update
> several config files of different smaller apps from one global
> setting.

If you do something complex like this, porting an application to
another config format is the smallest problem.  Or in other words:
This is not something I'd optimise config handling for.

> That's precisely why first XML and now YAML became popular for
> config files.

I can't speak for YAML, but XML was not used for the config files I
have in mind, but as a machine-readable serialisation format for
apps settings that you can set in the app itself.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
               (See http://ime.webhop.org for further contact info.)


From nick at craig-wood.com  Fri May  2 07:30:03 2008
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 02 May 2008 06:30:03 -0500
Subject: portable fork+exec/spawn
References: <1msaxj5xgfjyf.u0cdrgdllnus$.dlg@40tude.net>
	<8763tx1j5o.fsf@benfinney.id.au>
	<ml9u5tx2w10i.ym9gmtkot622$.dlg@40tude.net>
Message-ID: <slrng1lsu2.o5r.nick@irishsea.home.craig-wood.com>

Brendan Miller <catphive at catphive.net> wrote:
>  On Fri, 02 May 2008 13:25:55 +1000, Ben Finney wrote:
> 
> > URL:http://docs.python.org/lib/module-subprocess.html
> 
>  Awesome. This is exactly what I was hoping existed.

subprocess works well for spawn process, send input, receive output,
read exit code type jobs.

For jobs which require interactivity ie send input, receive output,
send input, receive output, ... it doesn't work well.  There isn't a
good cross platform solution for this yet.  pyexpect works well under
unix and is hopefully being ported to windows soon.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From nc at iname.com  Sun May 25 19:23:12 2008
From: nc at iname.com (NC)
Date: Sun, 25 May 2008 16:23:12 -0700 (PDT)
Subject: php vs python
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>
	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>
	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com> 
	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>
	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>
	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com> 
	<g1cjnb$1p57$1@news.mtu.ru>
Message-ID: <da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>

On May 25, 1:55 pm, Ivan Illarionov <ivan.illario... at gmail.com> wrote:
> On Sun, 25 May 2008 13:28:25 -0700, NC wrote:
>
> > A quick look at the revision log:
>
> > http://byteflow.su/log/
>
> > reveals that the initial commit of 60 or so files has been done
> > on 08/14/07 (10 months ago), a second developer came on board
> > 12/01/07 (seven+ months ago), a third one, on 01/04/08 (six+
> > months ago), a fourth one, on 01/16/08 (also six+ months ago).
> > There are at least nine discernible contributors overall.  Say
> > what you will, but it still looks an awful lot like like two
> > man-years, Django or no Django...
>
> I bet that if they did this with PHP framework they where far
> from where they are now.

The question is, which way?  :)  Jerry Stuckle, with whom I
wholeheartedly argue about half the time we post to the same threads
and argue bitterly the other half of the time, thinks they would be
ahead of where they are now...  :)

> I didn't say that it's not possible to write good code in PHP,

Indeed you didn't.  You did, however, say that development in Python/
Django is inherently faster than development in PHP (your exact words
were, "2 man/year in PHP == 2 man/week in Python/Django", implying a
50-fold difference).  This claim has just been obliterated using the
example you (not I) provided; my estimate of two man-years for
developing WordPress turns out to be fairly close to what has actually
gone into the development of Byteflow.  In other words, so far we have
discovered no evidence of Python's (or PHP's, to be fair) superiority
in terms of developer's productivity.

> IMHO Python language is better designed

That is indeed a matter of opinion.  You like (among other things)
immutable strings, the off-side rule, the idea that everything is an
object, and the fine distinction between mutable lists and immutable
tuples, and I have no problem with you liking these features, as long
as you agree that other people may have reasons to like the
alternatives better.

> Yes, it's possible to write something clean in PHP but it
> would require a lot more work.

In my opinion, it wouldn't, and in my experience, it doesn't.  All you
need is to actually put a designer in charge of design.  Additionally,
there are situations (rapid prototyping, for example) when
maintainability (the requirement behind the "clean code") is simply
not a concern.

Cheers,
NC


From dullrich at sprynet.com  Fri May 30 10:57:25 2008
From: dullrich at sprynet.com (David C. Ullrich)
Date: Fri, 30 May 2008 09:57:25 -0500
Subject: A video introducing Ulipad, an IDE mainly for Python
References: <mailman.1689.1211986714.12834.python-list@python.org>
Message-ID: <dullrich-0FBD1D.09572530052008@text.giganews.com>

In article <mailman.1689.1211986714.12834.python-list at python.org>,
 Dick Moores <rdm at rcblue.com> wrote:

> I've been using Ulipad, a free IDE mainly for Python, and written in 
> wxPython, for a couple of years, and think it's terrific. Now another 
> user, Kelie Feng, has made an 8-minute video showing it off. The 
> visual clarity of the video is remarkable. You can download it 
> (Introducing_Ulipad_2008-05-22.avi), and a codec (tscc.exe) that may 
> be necessary for your player, from <http://www.rcblue.com/u3/>.

I skipped the video and tried Ulipad. Looks very interesting.

The documentation I got is mostly in Chinese. Is there an
English version somewhere?

> Dick Moores

-- 
David C. Ullrich


From petr.poupa at gmail.com  Mon May 12 14:16:08 2008
From: petr.poupa at gmail.com (petr.poupa at gmail.com)
Date: Mon, 12 May 2008 11:16:08 -0700 (PDT)
Subject: Socket and cycle problem
References: <mailman.990.1210612612.12834.python-list@python.org>
Message-ID: <ef31cd3f-21ce-4dd0-b38e-e888d2c14ac6@z72g2000hsb.googlegroups.com>

On 12 Kv?, 19:16, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Mon, 12 May 2008 09:19:48 -0700 (PDT), petr.po... at gmail.com wrote:
>
> > [snip]
>
> >> >Where is the mistake? I dont know.
>
> >> You cannot reconnect a socket.  You need to create a new one for each
> >> connection.  It's also almost certainly the case that the way you are
> >> receiving data is incorrect.  There is no guarantee that you will get
> >> 2048 bytes from socket.recv(2048).  It isn't even guaranteed that all
> >> the bytes written to the socket by the peer will be returned by such
> >> a call.  Instead, you need a framing protocol to determine when all
> >> data has been received.  For example, you might length prefix the
> >> data, or you might insert a delimiter (or a terminator) at the end.  Or
> >> if there is exactly one message to receive, then you should just read
> >> until the recv call returns '', indicating EOF.
>
> >> Jean-Paul
>
> >ok thanks, but I am true greenhorn, so you think that the best way is
> >write new script?
> >Could you send me code if it isnt long, becase I have no idea and
> >unfortunately time as well.
>
> I'm not sure what you want to happen, so I can't write it for you.  I
> suggest you start with Twisted instead of the socket module, though,
> as Twisted provides a higher-level interface to network programming.
>
> You can find some introductory documentation about writing clients here:
>
>  http://twistedmatrix.com/projects/core/documentation/howto/clients.html
>
> Jean-Paul


My script send me via 3883 port (VRPN) data, but only once. I need
listening this port countinously.
So I need  make some loop to print data from 3883 port permanent.
Data that I recevied looks liek this:

receive data from server: 'vrpn: ver. 07.13  0\x00\xe8\x0b\x00\x00'

Do you think its necessary to use Twisted? Do you have any ideas how
to do it with socket modul?

thanks for reply


From pavlovevidence at gmail.com  Fri May  2 12:47:56 2008
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 2 May 2008 09:47:56 -0700 (PDT)
Subject: Best way to store config or preferences in a multi-platform way.
References: <INudna5di9DiNoTVnZ2dnUVZ8h6dnZ2d@giganews.com> 
	<slrng1jh5a.548.nick@irishsea.home.craig-wood.com>
	<mailman.463.1209745852.12834.python-list@python.org>
Message-ID: <747a2d26-b49d-4d9e-bf41-881d57bc0114@b1g2000hsg.googlegroups.com>

On May 2, 12:30 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 01 May 2008 10:30:03 -0300, Nick Craig-Wood <n... at craig-wood.com>
> escribi?:
>
> > As for where to store it, I use os.path.expanduser("~") to find the
> > base directory and a bit of platform specific code.
>
> > Something like this snippet
>
> >     self.is_windows = sys.platform == 'win32'
> >     self.home = os.path.expanduser("~")
> >     if self.is_windows:
> >         self.config_dir = os.path.join(self.home, "Application Data",
> > self.NAME)
> >     else:
> >         self.config_dir = os.path.join(self.home, "."+self.NAME)
> >     if not os.path.isdir(self.config_dir):
> >         os.makedirs(self.config_dir, mode=0700)
> >     self.config_file = os.path.join(self.config_dir, "config")
>
> Please don't do that if you distribute your programs. "Application Data"
> is a localized name, like "Program Files" and all special folders. On my
> Spanish version of Windows, they're "Datos de programa" y "Archivos de
> Programa" respectively, and the user may choose to move them to another
> location.
> Use SHGetFolderPath to obtain the path; see  http://msdn.microsoft.com/en-us/library/bb762181(VS.85).aspx

Thanks for the heads up: wasn't aware those guys were localized.

(Though I wonder why they bothered: Microsoft gives typical users a
guilt trip for putting their own files anywhere other than My
Documents, or Mis Documentos, or whatever.)


Carl Banks


From kyosohma at gmail.com  Thu May  1 16:38:43 2008
From: kyosohma at gmail.com (Mike Driscoll)
Date: Thu, 1 May 2008 13:38:43 -0700 (PDT)
Subject: send gpg encrypted emails (properly mime formatted)
References: <mailman.426.1209664674.12834.python-list@python.org>
Message-ID: <960c5175-e89d-4fec-82d1-57f6073797fb@a70g2000hsh.googlegroups.com>

On May 1, 12:57?pm, Neal Becker <ndbeck... at gmail.com> wrote:
> Any ideas on python packages that could help with sending gpg encrypted
> (properly mime formatted) emails?
>
> My idea is to forward all my emails to a remote imap server, but gpg encrypt
> them to myself in the process.

Take a look at this for the gpg part:

http://wiki.python.org/moin/GnuPrivacyGuard

And the standard library has the email module which does mime
formatting.

Mike


From n00m at narod.ru  Thu May  1 03:35:17 2008
From: n00m at narod.ru (n00m)
Date: Thu, 1 May 2008 00:35:17 -0700 (PDT)
Subject: A bug in difflib module? (find_longest_match)
Message-ID: <8054bd25-5a14-446d-a775-6efca1d5a2a0@m3g2000hsc.googlegroups.com>

from random import randint

s1 = ''
s2 = ''

for i in xrange(1000):
    s1 += chr(randint(97,122))
    s2 += chr(randint(97,122))

print s1[:25]
print s2[:25]

import difflib

s = difflib.SequenceMatcher(None, s1, s2)

print s.find_longest_match(0, len(s1), 0, len(s2))



>>> ============== RESTART ====================
>>>
yymgzldocfaafcborxbpqyade
urvwtnkwfmcduybjqmrleflqx
(0, 0, 0)
>>>

I think it's line #314 in difflib "who's to blame" --


From wuwei23 at gmail.com  Fri May 23 21:40:15 2008
From: wuwei23 at gmail.com (alex23)
Date: Fri, 23 May 2008 18:40:15 -0700 (PDT)
Subject: csv iterator question
References: <9bf8ca4b-5f5e-4c5f-ba3f-892a9430b1dd@t54g2000hsg.googlegroups.com>
Message-ID: <1c55346f-7fe2-488b-936c-e1dadb1c0c05@g16g2000pri.googlegroups.com>

On May 24, 6:36 am, davidj411 <davidj... at gmail.com> wrote:
> but when i try to iterate through it again, it appears to print
> nothing (no error either). the file is exhausted?

No, the iterator is finished. Iterators are generally use-once:

"The intention of the protocol is that once an iterator's next()
method raises StopIteration, it will continue to do so on subsequent
calls. Implementations that do not obey this property are deemed
broken." [http://docs.python.org/lib/typeiter.html]

As well as reading the iterator into a list, you can also create a
copy of the iterator:

>>> import itertools
>>> reader1, reader2 = itertools.tee(csv.reader(open('export.csv')))

Two copies is the default, but you can optionally specify as many as
you like:

>>> m, n, o = itertools.tee(iterator, 3)

- alex23






From szhorvat at gmail.com  Sat May  3 14:44:19 2008
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Sat, 03 May 2008 20:44:19 +0200
Subject: Feature suggestion: sum() ought to use a compensated summation
	algorithm
In-Reply-To: <m2zlr7l20r.fsf@googlemail.com>
References: <fvi54o$26lb$1@toralf.uib.no> <m2zlr7l20r.fsf@googlemail.com>
Message-ID: <481CB283.107@gmail.com>

Arnaud Delobelle wrote:
> 
> sum() works for any sequence of objects with an __add__ method, not
> just floats!  Your algorithm is specific to floats.

This occurred to me also, but then I tried

sum(['abc', 'efg'], '')

and it did not work.  Or is this just a special exception to prevent the 
  misuse of sum to join strings?  (As I said, I'm only an occasional user.)

Generally, sum() seems to be most useful for numeric types (i.e. those 
that form a group with respect to __add__ and __neg__/__sub__), which 
may be either exact (e.g. integers) or inexact (e.g. floating point 
types).  For exact types it does not make sense to use compensated 
summation (though it wouldn't give an incorrect answer, either), and 
sum() cannot decide whether a user-defined type is exact or inexact.

But I guess that it would still be possible to make sum() use 
compensated summation for built-in floating point types (float/complex).

Or, to go further, provide a switch to choose between the two methods, 
and make use compensated summation for float/complex by default.  (But 
perhaps people would consider this last alternative a bit too messy.)

(Just some thoughts ...)


From darcy at druid.net  Mon May 19 12:48:31 2008
From: darcy at druid.net (D'Arcy J.M. Cain)
Date: Mon, 19 May 2008 12:48:31 -0400
Subject: PyGreSQL installation
In-Reply-To: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>
References: <BLU131-DS673CE11A0621B3025461782C50@phx.gbl>
Message-ID: <20080519124831.c8b6aef5.darcy@druid.net>

On Mon, 19 May 2008 18:00:30 +0200
<ervin.ramonllari at hotmail.com> wrote:
> Hi there,
> 
> I'm trying to install PyGreSQL for python 2.4.

I assume that you got the installer from http://www.PyGreSQL.org/.  If
so, please join the PyGreSQL list (see above URL) and explain the
problem there. It's my module but I don't create the Windows package.
Others on that list can probably help you better or create a fixed
installer if that is the problem.

> I googled around and I found that the problem could be the libpq.dll file. Then I copied the libpq.dll to the windows directory as well as in the Python dll's directory but the problem is still there.

It's a guess but perhaps you need to properly install the PostgreSQL
client rather than copying files piecemeal.

-- 
D'Arcy J.M. Cain <darcy at druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


From dmitrey.kroshko at scipy.org  Fri May  9 06:22:51 2008
From: dmitrey.kroshko at scipy.org (dmitrey)
Date: Fri, 9 May 2008 03:22:51 -0700 (PDT)
Subject: How to kill Python interpreter from the command line?
References: <mailman.785.1210261857.12834.python-list@python.org> 
	<637ecc42-63f2-4ab0-b126-83059634f099@s50g2000hsb.googlegroups.com>
Message-ID: <d807e730-38cd-4ea9-a70c-84573b480998@a23g2000hsc.googlegroups.com>

in addition to killall and kill funcs mentioned above you could be
interested in pkill
see "man pkill" from terminal for more details

pkill python

or

pkill pyt

or

pkill <desired_signal> py


From mnordhoff at mattnordhoff.com  Sat May 10 22:34:59 2008
From: mnordhoff at mattnordhoff.com (Matt Nordhoff)
Date: Sun, 11 May 2008 02:34:59 +0000
Subject: Is using range() in for loops really Pythonic?
In-Reply-To: <482657ca$0$25026$607ed4bc@cv.net>
References: <482657ca$0$25026$607ed4bc@cv.net>
Message-ID: <48265B53.2080004@mattnordhoff.com>

John Salerno wrote:
> I know it's popular and very handy, but I'm curious if there are purists
> out there who think that using something like:
> 
> for x in range(10):
>     #do something 10 times
> 
> is unPythonic. The reason I ask is because the structure of the for loop
> seems to be for iterating through a sequence. It seems somewhat
> artificial to use the for loop to do something a certain number of
> times, like above.
> 
> Anyone out there refuse to use it this way, or is it just impossible to
> avoid?

Well, you should use "xrange(10)" instead of "range(10)". While range()
returns a list of every single number, xrange() returns an iterable
object that only generates them on-demand, so xrange(1) and
xrange(sys.maxint) will use the same amount of RAM.

(Not that it matters when it's only 10 items, of course.)

Other than that, "for i in xrange(10)" is a standard Python idiom, even
though it is a bit weird.
-- 


From paul.hankin at gmail.com  Tue May 20 12:08:25 2008
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 20 May 2008 09:08:25 -0700 (PDT)
Subject: Misuse of list comprehensions?
References: <038e4418$0$27258$c3e8da3@news.astraweb.com>
	<6359d72c-f937-46cd-b1ce-b7450671b714@i76g2000hsf.googlegroups.com>
Message-ID: <6102785c-57ef-4bf7-9bd3-394ef6855aa7@z72g2000hsb.googlegroups.com>

On May 20, 3:58 pm, Paul McGuire <pt... at austin.rr.com> wrote:

> def compress(s):
>     seen = set()
>     return ''.join(c for c in s if c not in seen and (seen.add(c) or
> True))

Slightly nicer is to move the set add out of the conditional...

def compress(s):
    seen = set()
    return ''.join(seen.add(c) or c for c in s if c not in seen)

I wouldn't write it this way though :)

--
Paul Hankin


From hat at se-162.se.wtb.tue.nl  Tue May  6 10:26:04 2008
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 06 May 2008 16:26:04 +0200
Subject: Am I missing something with Python not having interfaces?
References: <45de2f7e-484a-4871-bbaa-bf7eed5dfa40@x35g2000hsb.googlegroups.com>
Message-ID: <slrng20qjs.u1t.hat@se-162.se.wtb.tue.nl>

On 2008-05-06, jmDesktop <needin4mation at gmail.com> wrote:
> Studying OOP and noticed that Python does not have Interfaces.  Is
> that correct?  Is my schooling for nought on these OOP concepts if I

Depends on your definition of 'Python does not have Interfaces'. They are not
in the official language, but they do exist. look into zope.interfaces, at
http://www.zope.org/Products/ZopeInterface .

> use Python.  Am I losing something if I don't use the "typical" oop
> constructs found in other languages (Java, C# come to mind.)  I'm

I think you are still thinking with a Java mind-set (no idea about C#, never
programmed with it).

Interfaces mainly exist to formalize TO A COMPILER that an object will provide
certain stuff. In this way, the compiler can catch such errors at compile time.

Python on the other hand does very little at compile time (other than parse
errors). Instead, at run-time it performs the checks that something you want to
use is actually there.
(in the same way that you don't declare variables a priori. You simply use them
and Python creates them for you when needed).

As a result, you get much more light-weight, more dynamic, code, which supports
the RAD nature of Python what makes it so much more productive.

(after a few years Python, you may find the Java way of doing things clunky).


> afraid that if I never use them I'll lose them and when I need them
> for something beside Python, I'll be lost.  Thank you.

You can continue doing everything exactly in the way you do now. Effectively
you would then be programming Java/C# in Python syntax. I believe you would
gain very little by that move.

If you dare let go of your old habits, and embrace the mindset of a new
language, you can learn a lot more, namely that programming can be done in many
different ways (even if all those ways are called OOP).
If you only have a hammer, the whole world looks like a nail. If you have a
whole toolbox, problems become much more diverse (subtle). You learn to use
the right tools for the right problem, and maybe you find new (better) ways of
approaching old problems.


In the process, you may lose details of how something was done in language X,
but that's why they have invented books.

Sincerely,
Albert


From jstucklex at attglobal.net  Tue May 27 22:49:42 2008
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Tue, 27 May 2008 22:49:42 -0400
Subject: php vs python
In-Reply-To: <g1ih0n$1lj$1@news.mtu.ru>
References: <5l%Yj.77$mz3.53@fe101.usenetserver.com>	<bfd523cc-199b-478b-8017-1c43d4529d4b@l17g2000pri.googlegroups.com>	<37b112d8-a3ba-446d-9d2f-d907d93c637b@w8g2000prd.googlegroups.com>	<-t-dnWQ4bZN2MaTVnZ2dnUVZ_qGdnZ2d@comcast.com>	<68cb8bb1-4cc5-4a28-8915-46e7d4e316d9@d1g2000hsg.googlegroups.com>	<d0279b3f-4b4c-4dfb-a1ea-57ebc1d1e972@l17g2000pri.googlegroups.com>	<g1cjnb$1p57$1@news.mtu.ru>	<da1435f1-f3f5-414a-a765-b53ef76b2abf@c19g2000prf.googlegroups.com>	<g1cuvj$1rpd$1@news.mtu.ru>
	<V7OdnSYwdtimnKfVnZ2dnUVZ_radnZ2d@comcast.com>	<g1d1a4$1rpd$2@news.mtu.ru>
	<613388153.20080528051020@freemail.ru>	<g1icn8$r5$1@news.mtu.ru>
	<-o2dnfEz48JGJKHVnZ2dnUVZ_sidnZ2d@comcast.com>	<g1iem8$r5$3@news.mtu.ru>
	<nLqdnQ0paNyxXqHVnZ2dnUVZ_oSdnZ2d@comcast.com>
	<g1ih0n$1lj$1@news.mtu.ru>
Message-ID: <XP-dnY-sxO_KVaHVnZ2dnUVZ_vOdnZ2d@comcast.com>

Ivan Illarionov wrote:
> On Tue, 27 May 2008 22:27:40 -0400, Jerry Stuckle wrote:
> 
>> Ivan Illarionov wrote:
>>> On Tue, 27 May 2008 21:47:55 -0400, Jerry Stuckle wrote:
>>>
>>>> Ivan Illarionov wrote:
>>>>> On Wed, 28 May 2008 05:10:20 +0400, AnrDaemon wrote:
>>>>>
>>>>>> Greetings, Ivan Illarionov.
>>>>>> In reply to Your message dated Monday, May 26, 2008, 04:47:00,
>>>>>>
>>>>>>>> As I've said before - good programmers can write good code in any
>>>>>>>> language.
>>>>>>> Yes, they can. But it may be harder to do for them in one language
>>>>>>> and easier in another.
>>>>>> It's obvious lie. If you have clear mind and you know language
>>>>>> you're using, there are absolutely NOTHING can deny you to write
>>>>>> clear code. Even using forth postfix notation, I have no problem
>>>>>> writing good code, it's as easy as writing bad code. And yes, I do
>>>>>> see the difference.
>>>>> No. Language does matter.
>>>> Not for a good programmer.  Only for half-assed ones.
>>> No. Language does matter
>> Only to half-assed programmers.  Good programmers can write good code in
>> any language they know.
>>
>> Ever seen good assembler?  It can be done - really!  Also fortran,
>> cobol, forth... the list goes on.
> 
> Yeah,
> mov eax, Jerry
> mov killfile, eax

Stoopid troll.  But we already know you can't write good code.  No 
surprise there.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From fuzzyman at gmail.com  Sat May 24 10:14:17 2008
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sat, 24 May 2008 07:14:17 -0700 (PDT)
Subject: Why does python not have a mechanism for data hiding?
References: <52ba2118-d095-48a6-8844-2ee4c2ec2be1@m36g2000hse.googlegroups.com>
	<8763t3by81.fsf@benfinney.id.au>
Message-ID: <5ea78616-e955-4ee0-8e60-a22734ec31be@79g2000hsk.googlegroups.com>

On May 24, 2:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Sh4wn <luckyluk... at gmail.com> writes:
> > first, python is one of my fav languages, and i'll definitely keep
> > developing with it. But, there's 1 one thing what I -really- miss:
> > data hiding. I know member vars are private when you prefix them with
> > 2 underscores, but I hate prefixing my vars, I'd rather add a keyword
> > before it.
>
> From whom are you trying to hide your attributes?

Actually, 'data hiding', although vastly overused by the static crowd
can be a reasonable thing to want.

For example, at Resolver Systems we expose the spreadsheet object
model to our users. It hasa public, documented, API - plus a host of
undocumented internally used methods.

We would really *much* rather hide these, because anything our
customers start using (whether documented or not) we will probably
have to continue supporting and maintaining.

The 'we told you not to use that' approach, when applied to paying
customers doesn't really work... all they see is that you broke their
spreadsheet code by changing your API.

You can make members truly private by proxying, but it is a bit
ungainly.

Michael Foord
http://www.ironpythoninaction.com/


>
> In Python, the philosophy "we're all consenting adults here" applies.
> You shouldn't pretend to know, at the time you write it, all the uses
> to which your code will be put. Barriers such as enforced "private"
> attributes will only cause resentment when people, despite your
> anticipations, *need* to access them and are then forced to hack their
> way around them.
>
> If you want the users of your code to know that an attribute should
> not be used as a public API for the code, use the convention of naming
> the attribute with a single leading underscore. This is a string
> signal that the attribute is part of the implementation, not the
> interface. The reader is then on notice that they should not rely on
> that attribute; but they are not *prohibited* from using it if
> necessary to their ends.
>
> > Python advertises himself as a full OOP language, but why does it
> > miss one of the basic principles of OOP?
>
> Who taught you that enforced restrictions on attribute access was a
> "basic principle" of OO?
>
> Perhaps you're confusing the "encapsulation" and "abstraction"
> principles for enforced access restrictions; they're not.
>
> > Will it ever be added to python?
>
> I hope not.
>
> --
>  \            "Why was I with her? She reminds me of you. In fact, she |
>   `\             reminds me more of you than you do!"  -- Groucho Marx |
> _o__)                                                                  |
> Ben Finney



From toby at tobiah.org  Fri May 30 15:21:50 2008
From: toby at tobiah.org (Tobiah)
Date: Fri, 30 May 2008 12:21:50 -0700
Subject: make a string a list
References: <g1n7an$1dr$1@registered.motzarella.org>
	<87y75srcx7.fsf@benfinney.id.au>
Message-ID: <pan.2008.05.30.19.21.49.303578@tobiah.org>


>> or a string iterable ? How can I do that. I have lots of '\r\n'
>> characters in the string which I think can be easier if it were made
>> into a list and I can easily see if the required value (its a numeral)
>> is present in it or not after some position or after some characters'
>> position.

They already are.  They are quite like lists in many ways:

>>> s = 'abcdefg'
>>> for c in s: print c
...
a
b
c
d
e
f
g
>>> s[3]
'd'
>>> s = "foo\r\n"
>>> s.find("\r")
3
>>> s.replace("\r", "").replace("\n", "")
'foo'
>>>           

** Posted from http://www.teranews.com **


From mal at egenix.com  Tue May  6 04:33:46 2008
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 06 May 2008 10:33:46 +0200
Subject: config files in python
In-Reply-To: <87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
References: <44f9662d-a88d-418c-a11d-b7b472b01fc3@j33g2000pri.googlegroups.com>
	<87332548-4f15-49c3-8c92-4aa20e355747@n1g2000prb.googlegroups.com>
Message-ID: <482017EA.40706@egenix.com>

On 2008-05-06 01:16, Matimus wrote:
> On May 4, 11:35 pm, sandipm <sandip.m... at gmail.com> wrote:
>> Hi,
>>  In my application, I have some configurable information which is used
>> by different processes. currently I have stored configration in a
>> conf.py file as name=value pairs, and I am importing conf.py file to
>> use this variable. it works well
>>
>> import conf
>> print conf.SomeVariable
>>
>> but if I need to change some configuration parameteres,  it would need
>> me to restart processes.
>>
>> I want to store this data in some conf file (txt) and would like to
>> use it same way as I am using these variables as defined in py
>> files.
>>
>> one solution I can think of is writing data as a dictionary into conf
>> file. and then by reading data, apply eval on that data. and update
>> local dict? but this is not a good solution....
>>
>> any pointers?
>>
>> Sandip
> 
> I would load the configuration file using `imp.load_source'. This
> allows you to load the config file by filename, and gets away from the
> issue of accidentally importing a file somewhere else in pythons
> search path. Also, calling imp.load_source will reload the module when
> called a second time.
 >
> http://docs.python.org/lib/module-imp.html

Why not just use execfile() ?

http://www.python.org/doc/2.2.3/lib/built-in-funcs.html

> [conf.py]
> a = 1
> b = 2
> class c:
>     a = "hello"
>     b = "world"
> [/end conf.py]
> 
>>>> conf = imp.load_source("conf", "./conf.py")
>>>> conf.a
> 1
>>>> conf.b
> 2
>>>> conf.c.a
> 'hello'
>>>> conf.c.b
> 'world'
> 
> 
> 
> There are so many ways potential solutions to your problem that,
> without any more details, it is hard to suggest anything.
> 
> Here are some potential solutions:
> 
> ConfigParser - module for handling ini files
> xml - several built-in modules for handling XML files
> sqlite3 - a `lite' SQL database built-in in python 2.5 + (can be used
> for config data)
> windows registry  - _winreg module
> pickle - serialize python objects
> marshal - similar to pickle, only works for simple objects
> 
> Those are just the built-in solutions. If you wanna look at 3rd party
> solutions, prepare for overload. The number of alternative INI parsers
> alone is staggering.
> 
> Also, there are many ways to organize your data and use a solution
> similar to what you are already using.
> 
> I guess what I'm trying to say is... don't roll your own, it would be
> a waste of time, this problem has been solved 100s of times. That is,
> unless you want to do it for fun.
> 
> Matt
> --
> http://mail.python.org/mailman/listinfo/python-list

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 06 2008)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


    eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
     D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
            Registered at Amtsgericht Duesseldorf: HRB 46611


From mishok13 at gmail.com  Tue May 27 10:50:22 2008
From: mishok13 at gmail.com (Andrii V. Mishkovskyi)
Date: Tue, 27 May 2008 17:50:22 +0300
Subject: New chairman
In-Reply-To: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
References: <3720fb99-ac37-469b-b8ce-ece3ed27b8e5@m36g2000hse.googlegroups.com>
Message-ID: <192840a00805270750r5e4b89e9y1a8980714ef86671@mail.gmail.com>

2008/5/27 Sverker Nilsson <sn at sncs.se>:
> seems to be needed
>
> He doesn't seem to care much anyway now
>
> Or if he cares, he have many other assignments

Who are you talking about?

>
> So should we try to elect a new chairman?

Chairman? Elaborate please.

>
> I am probably not eligible. There must be many others.!
>
> Do you dare?consper
>

Hm, are you and castrionpi twin brothers or something?

> S.
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.


From larzluv at hotmail.com  Mon May 12 03:15:00 2008
From: larzluv at hotmail.com (Larry Hale)
Date: Mon, 12 May 2008 00:15:00 -0700 (PDT)
Subject: Module python-magic on/for Windows?
References: <e779c310-310c-4072-a82e-bad09d4d76c7@m44g2000hsc.googlegroups.com>
	<3a66adfe-3fd6-4f23-a6e8-4b219db1a3cd@x41g2000hsb.googlegroups.com> 
	<mailman.957.1210565373.12834.python-list@python.org>
	<d098efb5-c16d-4147-9422-6f0cce0183e1@k37g2000hsf.googlegroups.com>
	<2eb6f620-4aca-469e-9cdd-d6b0174da41e@8g2000hse.googlegroups.com>
Message-ID: <27bc596d-0775-468b-9a1b-fd2513b73812@k37g2000hsf.googlegroups.com>

On May 12, 1:34 am, Larry Hale <larz... at hotmail.com> wrote:

> The file source (previously linked from http://hupp.org/adam/hg/python-magic/)
> has the man pages...


Err...  I meant "http://downloads.sourceforge.net/gnuwin32/file-4.21-
bin.zip?modtime=1180175868&big_mirror=1"!  :)


From marlin_rowley at hotmail.com  Fri May 16 18:15:51 2008
From: marlin_rowley at hotmail.com (Marlin Rowley)
Date: Fri, 16 May 2008 17:15:51 -0500
Subject: numpy.frombuffer != unpack() ??
Message-ID: <BAY135-W51CFA225AA7A677BBA3C159FC80@phx.gbl>

All:
 
I'm getting different floating point values when I use numpy vs. unpack().
 
frgba = numpy.frombuffer(<string of bytes>, dtype=float32)
buffer = unpack("!f", byte)
 
frgba[0] != buffer[0]
 
why?  This is forcing me use the unpack() function since it's giving me the correct values.  What am I doing wrong?
 
-M
 
 
_________________________________________________________________
Change the world with e-mail. Join the i?m Initiative from Microsoft.
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From arnodel at googlemail.com  Fri May  9 07:13:46 2008
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 9 May 2008 04:13:46 -0700 (PDT)
Subject: simple question about Python list
References: <7f1db30b-426f-42ca-bdd3-7264d7e095c6@24g2000hsh.googlegroups.com>
	<ddffdd85-0a47-4d37-bd5c-b9670ec6cef3@a70g2000hsh.googlegroups.com> 
	<ea5910ae-9605-4052-ae39-9d15f8139a75@2g2000hsn.googlegroups.com>
Message-ID: <47abefdf-058e-495f-ae91-3fe0c831ccd7@25g2000hsx.googlegroups.com>



dmitrey wrote:
> Ok, I use Python 2.5 but I try my code to remain Python 2.4 and
> (preferable) 2.3 compatible.
> Are there other solutions?
> D.
>
> On 9 ???, 13:17, Paul Hankin <paul.han... at gmail.com> wrote:
> > On May 9, 11:04?am, dmitrey <dmitrey.kros... at scipy.org> wrote:
> >
> > > list1 = ['elem0', 'elem1', 'elem2', 'elem3', 'elem4', 'elem5']
> > > and
> > > list2 = [0, 2, 4] # integer elements
> >
> > > howto (I mean most simple recipe, of course) form list3 that contains
> > > elements from list1 with indexes from list2, i.e.
> >
> > list3 = [list1[i] for i in list2]
> >
> > --
> > Paul Hankin

This works under python 2.0+, I think.

Before that, you could have written:

list3 = map(list1.__getitem__, list2)

--
Arnaud


From deets at nospam.web.de  Mon May  5 06:22:38 2008
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 May 2008 12:22:38 +0200
Subject: USB HID documentation?
References: <dba38364-f54d-47dc-86f3-a83b9e0b8792@y18g2000pre.googlegroups.com>
Message-ID: <6885g8F2s6gaeU1@mid.uni-berlin.de>

ETP wrote:

> I have a little robot project I'm programming in python using the
> Lynxmotion SSC-32 servo controller via serial.  I'd like to use a USB
> game controller (PS2 style) to control the robot.
> 
> I've read a number of threads about the difficulty of using USB
> without extensive understanding of the way it works, but a few have
> stated that HID is different somehow.  I definitely do not have any
> USB knowledge, and I don't care to get into that.  However, if USB-HID
> is much simpler I would love to learn.
> 
> I have the python extensions for windows:
>      http://sourceforge.net/project/showfiles.php?group_id=78018
> but I haven't found any documentation on how to implement HID in
> python.  Can anyone give me some examples or links?

You seem to misunderstand HID. HID is a protocol over USB (and Bluetooth I
believe) that will create user input device events which are mapped to your
OS input layer. That means that whenever you e.g. attach a keyboard device,
it's keyboard events will generate key-strokes on screen.

There are various kinds of HID-devices, and gamepads/joysticks generate
certain events.

So you need to look up you OS game device API and use that. Then attaching
any compliant HID-device should work.

Diez


From tjreedy at udel.edu  Sat May 24 01:15:17 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 May 2008 01:15:17 -0400
Subject: would this be called bug?
References: <ab143223-2592-4973-943a-a4bd94e25701@u36g2000prf.googlegroups.com>
Message-ID: <g18896$jg3$1@ger.gmane.org>


"Amit Gupta" <emailamit at gmail.com> wrote in message 
news:ab143223-2592-4973-943a-a4bd94e25701 at u36g2000prf.googlegroups.com...
| The code is attached below. Basically I am taking a substring of
| variable m, and using "buffer" instead of slicing.
|
| However, the application of int on that buffer start correctly from
| the offset, but it scans all the way to the end, instead of stopping
| at the length of the buffer.
|
| It works however, if I apply str function to output of buffer
| function.
|
| -A
|
|
| (Pdb) m = "AA1234AA"
| (Pdb) x = buffer(m, 2, 4)
| (Pdb) x
| <read-only buffer for 0x2a9d0c18a0, size 4, offset 2 at 0x2a9d0cb7f0>
| (Pdb) int(x)
| *** ValueError: invalid literal for int() with base 10: '1234AA'
| (Pdb) m = "AA1234AA"
| (Pdb) m = "AA1234"
| (Pdb) x = buffer(m, 2, 4)
| (Pdb) int(x)
| 1234
| (Pdb)

Just so you know, buffer() has been deprecated in 2.x and has been replaced 
in Py3 by memoryview() (I believe) because others have had problems with 
buffer().
Don't know any more.





From castironpi at gmail.com  Wed May 14 14:16:28 2008
From: castironpi at gmail.com (castironpi at gmail.com)
Date: Wed, 14 May 2008 11:16:28 -0700 (PDT)
Subject: I'm stuck in Python!
References: <cb0d232a-6a26-46b1-8bf9-dac625abf9e6@d1g2000hsg.googlegroups.com>
	<ac4a9f2b-e565-4a44-a6a0-2ec7e86fe616@e39g2000hsf.googlegroups.com> 
	<0563506d-bd36-404d-8961-4c4c5d1cc029@t54g2000hsg.googlegroups.com> 
	<V7mWj.65254$%15.28939@bignews7.bellsouth.net>
	<e0307f48-fc2f-40ff-a7e7-3998ae7a8d01@1g2000prg.googlegroups.com>
	<6a0167c3-bd87-4ddc-a161-249b7bf933c2@s50g2000hsb.googlegroups.com> 
	<1f6bc3b5-da44-42a2-82f1-4aec5a6d31b1@c58g2000hsc.googlegroups.com> 
	<499bc2af-6c7d-4ff4-abba-db06f4122cf9@x41g2000hsb.googlegroups.com> 
	<b9405631-c5ce-466b-9013-f9be5f77cd3c@24g2000hsh.googlegroups.com> 
	<0a3717f4-5992-484d-a39c-04f0d2cfec3a@m45g2000hsb.googlegroups.com> 
	<4559b920-f42f-4fdb-afc7-fc6bfc1b9ff1@r66g2000hsg.googlegroups.com> 
	<8c23edae-a957-42c8-82a0-82853467aaa4@s50g2000hsb.googlegroups.com>
Message-ID: <5cedfda6-a64a-456a-ab90-ed33229036a2@b64g2000hsa.googlegroups.com>

On May 14, 1:09?pm, castiro... at gmail.com wrote:
> On May 14, 1:07?pm, castiro... at gmail.com wrote:
>
>
>
>
>
> > On May 14, 1:06?pm, castiro... at gmail.com wrote:
>
> > > On May 14, 1:02?pm, castiro... at gmail.com wrote:
>
> > > > On May 14, 12:51?pm, castiro... at gmail.com wrote:
>
> > > > > On May 14, 5:25?am, castiro... at gmail.com wrote:
>
> > > > > > On May 14, 4:32?am, castiro... at gmail.com wrote:
>
> > > > > > > On May 13, 9:55?pm, alex23 <wuwe... at gmail.com> wrote:
>
> > > > > > > > On May 14, 5:41 am, "inhahe" <inh... at gmail.com> wrote:
>
> > > > > > > > > "George Sakkis" <george.sak... at gmail.com> wrote in message
> > > > > > > > > > You must be new here. It is an AS (Artificial Stupidity) trolling bot,
> > > > > > > > > > you can safely ignore its posts.
>
> > > > > > > > > How does it generate text?
>
> > > > > > > > My guess is by inhaling a lot of intoxicants.
>
> > > > > > > However you know what would be helpful? ?If I could go to the right
> > > > > > > place to start the ring.
>
> > > > > > I have a slightly sinister role on stage. ?Does anyone want to play?
>
> > > > > I'd stay on mutability for the world domination factor. ?Fluent
> > > > > currency is buoyant currency; turn on a local clock, and someone gets
> > > > > some cubic verticals.
>
> > > > > Now if sense-reference is trading on the BDFL, I'm still holding Tron
> > > > > can pretty well win work.- Hide quoted text -
>
> > > > > - Show quoted text -
>
> > > > I have a self-referential on Pygame: it's a Hand Tool object.
> > > > Currently, it decays over time. ?You said 'flip' in the newsgroup, and
> > > > 'check', 'cross', and 'mate'. ?Now who jumps who?- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > If Python can plot in to chess, and Tron rings live, then why not
> > > group it knew?- Hide quoted text -
>
> > > - Show quoted text -
>
> > That would be know. ?Plot and split in too.- Hide quoted text -
>
> > - Show quoted text -
>
> Now can I catch function-type objects from a throw? ?I'm crossing all
> of those.- Hide quoted text -
>
> - Show quoted text -

I have destin and fate and die, growth sustanance and decay.  Now cars
are important, but not logically still.  I am certain I play, so;
where's the ring?


From tjreedy at udel.edu  Fri May 16 20:15:37 2008
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 May 2008 20:15:37 -0400
Subject: default object comparison considered harmful?
References: <slrng2qfv0.9es.hat@se-162.se.wtb.tue.nl>
	<ef210bea-d81e-4bb6-bd0c-656d9a3d1989@b64g2000hsa.googlegroups.com>
Message-ID: <g0l839$gri$1@ger.gmane.org>

| On 16 Mai, 10:03, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
| > Yesterday we found the cause of a bug that has caused problems for a 
long time.
| > It appeared to be the following:
| >
| > class A(object):
| >     pass
| >
| > print min(1.0, A())
| >
| > which is accepted by Python even though the A() object is not numerical 
in
| > nature.
| >
| > The cause of this behavior seems to be the compare operation of the 
object
| > class.
| >
| > Is there a way to disable this behavior in Python (other than deriving 
a new
| > 'object-like' class that doesn't do comparisons?)

Use Python 3! That is one of many improvements. 





From gagsl-py2 at yahoo.com.ar  Mon May 12 02:18:02 2008
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 May 2008 03:18:02 -0300
Subject: Best technology for agent/web server architecture
References: <c496e0a70805080716t5aadee9ax9fae96b693a7f30c@mail.gmail.com>
	<4823268D.1060602@egenix.com>
	<c496e0a70805090141i4eb31d7dn91c4888063b30613@mail.gmail.com>
Message-ID: <op.ua02gchlx6zn5v@a98gizw.cpe.telecentro.net.ar>

> 2008/5/8 M.-A. Lemburg <mal at egenix.com>:
>
>> SOAP would be a good choice if you want to send to data to other
>> servers as well, e.g. Java-based ones.
>>
>> XML-RPC and JSON are better for simple data structures.
>>
>> If you have control over both client and server and don't
>> need to bother with other backends or frontends, Python
>> pickle is the best choice.

En Fri, 09 May 2008 05:41:07 -0300, Florencio Cano <florencio.cano at gmail.com> escribi?:

> I have control over agent and client but I'm not sure how to use
> pickle for this task. Do you suggest to pickle the objects that I want
> to send and send it over a usual socket? I have searched a bit in
> Google and I have seen that Pickle is insecure by default. What do you
> think about this?

"insecure" means that someone could build a specially crafted pickle able to run arbitrary code on the unpickling environment. One way to avoid that is to only accept pickles from trusted sources: using SSL by example.

-- 
Gabriel Genellina



From darkwind.87 at gmail.com  Thu May 29 04:10:58 2008
From: darkwind.87 at gmail.com (Dark Wind)
Date: Thu, 29 May 2008 01:10:58 -0700
Subject: code of a function
Message-ID: <8a6035a00805290110v67ed53d0j8ae9c93b3089565c@mail.gmail.com>

Hi,

Is there any command in Python which gives the code for a function like just
typing the name of a function (say svd) in R returns its code.

Thank you
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From timr at probo.com  Fri May  2 01:32:28 2008
From: timr at probo.com (Tim Roberts)
Date: Fri, 02 May 2008 05:32:28 GMT
Subject: #!/usr/bin/env python   vs.  #!/usr/bin/python
References: <CeuSj.107251$rd2.30692@pd7urf3no>
Message-ID: <ek9l14d5mlm2q70spgulo74k10euukp3it@4ax.com>

Yves Dorfsman <yves at zioup.com> wrote:
>
>On UNIX, some people use
>#!/usr/bin/env python
>
>While other use
>#!/usr/bin/python
>
>Why is one preferred over the other one ?

The /usr/bin/env solution finds the Python interpreter anywhere on the
PATH, whether it be /usr/bin or /usr/local/bin, or whatever.  With
/usr/bin/python, it MUST be in /usr/bin.

Way back when, Python wasn't included in Linux distributions by default, so
it was difficult to predict where it would be.  /usr/bin/env, on the other
hand, is well-established at that location.

These days, since Python is nearly ubiquitous, I suspect it is not so
important.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From http  Fri May 23 06:48:56 2008
From: http (Paul Rubin)
Date: 23 May 2008 03:48:56 -0700
Subject: Python is slow
References: <a725111b-0dce-4923-861a-b7138af602a1@k10g2000prm.googlegroups.com>
	<g14rk0$4pf$1@solaris.cc.vt.edu>
	<4836772e$0$6097$426a74cc@news.free.fr>
	<BqvZj.2718$772.1718@bignews2.bellsouth.net>
Message-ID: <7xk5hll2hz.fsf@ruckus.brouhaha.com>

"inhahe" <inhahe at gmail.com> writes:
> planets are spherical (all implementations of Python are not natively 
> compiled (and you said for whatever definition)), and b) It's a far cry to 
> imagine a planet coming into being that's not spherical (a language as 
> dynamic as Python, or most other scripting languages, would be either 
> extremely difficult or impossible to make a native compiler for).

There are native Python compilers, see psyco and pypy.